blob: 327b8c34d3606e5d234f006fd26a3293f12b1d36 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/delay.h>
40#include <linux/errno.h>
Jeff Laytonfeaff8e2015-05-12 15:48:10 -040041#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/string.h>
Trond Myklebust652f89f2011-12-09 19:05:58 -050043#include <linux/ratelimit.h>
44#include <linux/printk.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090045#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
Bryan Schumaker9b7160c2011-04-13 14:31:30 -040051#include <linux/nfs_mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <linux/namei.h>
Trond Myklebust02a913a2005-10-18 14:20:17 -070053#include <linux/mount.h>
Benny Halevy99fe60d2009-04-01 09:22:29 -040054#include <linux/module.h>
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +000055#include <linux/xattr.h>
Andy Adamsonc7a360b2011-01-25 19:15:32 -050056#include <linux/utsname.h>
Jeff Laytond3103102011-12-01 22:44:39 +010057#include <linux/freezer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Trond Myklebust4ce79712005-06-22 17:16:21 +000059#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include "delegation.h"
Trond Myklebust101070c2008-02-19 20:04:23 -050061#include "internal.h"
Chuck Lever006ea732006-03-20 13:44:14 -050062#include "iostat.h"
Andy Adamsonfc931582009-04-01 09:22:31 -040063#include "callback.h"
Andy Adamsonb1f69b72010-10-20 00:18:03 -040064#include "pnfs.h"
Chuck Leverf0920752012-05-21 22:45:41 -040065#include "netns.h"
Anna Schumaker40c64c22015-04-15 13:00:05 -040066#include "nfs4idmap.h"
Trond Myklebust73e39aa2012-11-26 12:49:34 -050067#include "nfs4session.h"
David Howellsde242c02012-12-20 21:52:38 +000068#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Trond Myklebustc6d01c62013-08-09 11:51:26 -040070#include "nfs4trace.h"
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#define NFSDBG_FACILITY NFSDBG_PROC
73
Trond Myklebust2066fe82006-09-15 08:30:46 -040074#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#define NFS4_POLL_RETRY_MAX (15*HZ)
76
Trond Myklebustcdd4e682006-01-03 09:55:12 +010077struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010078static int _nfs4_proc_open(struct nfs4_opendata *data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -080079static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Chuck Lever81934dd2012-03-01 17:01:57 -050081static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
David Quigley1775fd32013-05-22 12:50:42 -040082static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
Trond Myklebust0ab64e02010-04-16 16:22:51 -040084static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -040086 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
Bryan Schumakerf062eb62011-06-02 14:59:10 -040088#ifdef CONFIG_NFS_V4_1
Trond Myklebustab7cb0d2013-05-20 11:20:27 -040089static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
Bryan Schumakerf062eb62011-06-02 14:59:10 -040093#endif
David Quigleyaa9c2662013-05-22 12:50:44 -040094
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
David Quigleyaa9c2662013-05-22 12:50:44 -0400108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141/* Prevent leaks of NFSv4 errors into userland */
WANG Cong46f72f52008-12-30 16:35:55 -0500142static int nfs4_map_errors(int err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Trond Myklebust52567b02009-10-23 14:46:42 -0400144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
Weston Andros Adamson30005122013-02-28 20:30:10 -0500148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
Trond Myklebust52567b02009-10-23 14:46:42 -0400150 return -EREMOTEIO;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +0000151 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson88975382013-08-13 16:37:38 -0400152 case -NFS4ERR_WRONG_CRED:
Bryan Schumaker7ebb9312011-03-24 17:12:30 +0000153 return -EPERM;
Trond Myklebust3ddeb7c2011-02-22 15:44:31 -0800154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
Trond Myklebustfb13bfa2012-05-28 11:36:28 -0400157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
Steve Dicksonf25efd82012-06-06 14:12:07 -0400159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
Trond Myklebust6e3cf242013-03-23 15:22:45 -0400161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
Trond Myklebust52567b02009-10-23 14:46:42 -0400163 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 dprintk("%s could not handle NFSv4 error %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700165 __func__, -err);
Trond Myklebust52567b02009-10-23 14:46:42 -0400166 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
Trond Myklebust52567b02009-10-23 14:46:42 -0400168 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
Trond Myklebust1549210f2012-06-05 09:16:47 -0400174const u32 nfs4_fattr_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
Anna Schumakerea96d1e2015-04-03 14:35:59 -0400188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
David Quigleyaa9c2662013-05-22 12:50:44 -0400190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193};
194
Trond Myklebust1549210f2012-06-05 09:16:47 -0400195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
Trond Myklebust95864c92015-12-26 15:06:03 -0500211#ifdef CONFIG_NFS_V4_SECURITY_LABEL
212 | FATTR4_WORD2_SECURITY_LABEL
213#endif
Trond Myklebust1549210f2012-06-05 09:16:47 -0400214};
215
Andy Adamsone23008e2012-10-02 21:07:32 -0400216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
David Quigleya09df2c2013-05-22 12:50:41 -0400222const u32 nfs4_statfs_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
David Quigleya09df2c2013-05-22 12:50:41 -0400231const u32 nfs4_pathconf_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
Fred Isamandae100c2011-07-30 20:52:37 -0400237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
Ricardo Labiaga55b6e772010-10-12 16:30:06 -0700241 FATTR4_WORD1_TIME_DELTA
Fred Isamandae100c2011-07-30 20:52:37 -0400242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
Peng Tao2a92ee92015-09-26 02:24:37 +0800244 | FATTR4_WORD2_CLONE_BLKSIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245};
246
David Quigleya09df2c2013-05-22 12:50:41 -0400247const u32 nfs4_fs_locations_bitmap[3] = {
Manoj Naik830b8e32006-06-09 09:34:25 -0400248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
David Quigleya09df2c2013-05-22 12:50:41 -0400263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
Manoj Naik830b8e32006-06-09 09:34:25 -0400264};
265
Al Virobc4785c2006-10-19 23:28:51 -0700266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 struct nfs4_readdir_arg *readdir)
268{
Al Viro0dbb4c62006-10-19 23:28:49 -0700269 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000272 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
Cong Wang2b86ce22011-11-25 23:14:33 +0800289 start = p = kmap_atomic(*readdir->pages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
David Howells2b0143b2015-03-17 22:25:59 +0000301 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
David Howells2b0143b2015-03-17 22:25:59 +0000313 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
Cong Wang2b86ce22011-11-25 23:14:33 +0800317 kunmap_atomic(start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
NeilBrown8478eaa2014-09-18 16:09:27 +1000320static long nfs4_update_delay(long *timeout)
321{
322 long ret;
323 if (!timeout)
324 return NFS4_POLL_RETRY_MAX;
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
329 ret = *timeout;
330 *timeout <<= 1;
331 return ret;
332}
333
Trond Myklebust65de8722008-12-23 15:21:44 -0500334static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335{
336 int res = 0;
337
338 might_sleep();
339
NeilBrown8478eaa2014-09-18 16:09:27 +1000340 freezable_schedule_timeout_killable_unsafe(
341 nfs4_update_delay(timeout));
Trond Myklebust65de8722008-12-23 15:21:44 -0500342 if (fatal_signal_pending(current))
343 res = -ERESTARTSYS;
Trond Myklebust65de8722008-12-23 15:21:44 -0500344 return res;
345}
346
347/* This is the error handling routine for processes that are allowed
348 * to sleep.
349 */
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400350static int nfs4_do_handle_exception(struct nfs_server *server,
351 int errorcode, struct nfs4_exception *exception)
Trond Myklebust65de8722008-12-23 15:21:44 -0500352{
353 struct nfs_client *clp = server->nfs_client;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500354 struct nfs4_state *state = exception->state;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500355 struct inode *inode = exception->inode;
Trond Myklebust65de8722008-12-23 15:21:44 -0500356 int ret = errorcode;
357
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400358 exception->delay = 0;
359 exception->recovering = 0;
Trond Myklebust65de8722008-12-23 15:21:44 -0500360 exception->retry = 0;
361 switch(errorcode) {
362 case 0:
363 return 0;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500364 case -NFS4ERR_OPENMODE:
Trond Myklebust5ba12442015-06-16 11:26:35 -0400365 case -NFS4ERR_DELEG_REVOKED:
366 case -NFS4ERR_ADMIN_REVOKED:
367 case -NFS4ERR_BAD_STATEID:
Trond Myklebust4816fda2015-09-20 14:58:42 -0400368 if (inode && nfs_async_inode_return_delegation(inode,
369 NULL) == 0)
370 goto wait_on_recovery;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500371 if (state == NULL)
372 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500376 goto wait_on_recovery;
Trond Myklebust0ced63d2011-05-26 14:26:35 -0400377 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -0400378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500383 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500384 case -NFS4ERR_STALE_CLIENTID:
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
Chuck Lever519ae252013-10-17 14:13:19 -0400387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -0400392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500395#if defined(CONFIG_NFS_V4_1)
Andy Adamson4745e312009-04-01 09:22:42 -0400396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
Trond Myklebust9f594792012-05-27 13:02:53 -0400405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
Bryan Schumaker399f11c2012-10-30 16:06:35 -0400406 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500407#endif /* defined(CONFIG_NFS_V4_1) */
Trond Myklebust65de8722008-12-23 15:21:44 -0500408 case -NFS4ERR_FILE_OPEN:
NeilBrown44ed3552009-12-03 15:58:56 -0500409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500416 case -NFS4ERR_DELAY:
Trond Myklebust2598ed32015-09-20 16:10:18 -0400417 nfs_inc_server_stats(server, NFSIOS_DELAY);
418 case -NFS4ERR_GRACE:
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400419 exception->delay = 1;
420 return 0;
421
Andy Adamsona8a4ae32011-05-03 13:43:03 -0400422 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebust65de8722008-12-23 15:21:44 -0500423 case -NFS4ERR_OLD_STATEID:
424 exception->retry = 1;
Trond Myklebustb064eca22011-02-22 15:44:32 -0800425 break;
426 case -NFS4ERR_BADOWNER:
427 /* The following works around a Linux server bug! */
428 case -NFS4ERR_BADNAME:
429 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
430 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
431 exception->retry = 1;
432 printk(KERN_WARNING "NFS: v4 server %s "
433 "does not accept raw "
434 "uid/gids. "
435 "Reenabling the idmapper.\n",
436 server->nfs_client->cl_hostname);
437 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500438 }
439 /* We failed to handle the error */
440 return nfs4_map_errors(ret);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500441wait_on_recovery:
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400442 exception->recovering = 1;
443 return 0;
444}
445
446/* This is the error handling routine for processes that are allowed
447 * to sleep.
448 */
449int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
450{
451 struct nfs_client *clp = server->nfs_client;
452 int ret;
453
454 ret = nfs4_do_handle_exception(server, errorcode, exception);
455 if (exception->delay) {
456 ret = nfs4_delay(server->client, &exception->timeout);
457 goto out_retry;
458 }
459 if (exception->recovering) {
460 ret = nfs4_wait_clnt_recover(clp);
461 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
462 return -EIO;
463 goto out_retry;
464 }
465 return ret;
466out_retry:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500467 if (ret == 0)
468 exception->retry = 1;
469 return ret;
Trond Myklebust65de8722008-12-23 15:21:44 -0500470}
471
Trond Myklebust037fc982015-09-20 15:51:00 -0400472static int
473nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
474 int errorcode, struct nfs4_exception *exception)
475{
476 struct nfs_client *clp = server->nfs_client;
477 int ret;
478
479 ret = nfs4_do_handle_exception(server, errorcode, exception);
480 if (exception->delay) {
481 rpc_delay(task, nfs4_update_delay(&exception->timeout));
482 goto out_retry;
483 }
484 if (exception->recovering) {
485 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
486 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
487 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
488 goto out_retry;
489 }
490 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
491 ret = -EIO;
492 return ret;
493out_retry:
494 if (ret == 0)
495 exception->retry = 1;
496 return ret;
497}
498
499static int
500nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
501 struct nfs4_state *state, long *timeout)
502{
503 struct nfs4_exception exception = {
504 .state = state,
505 };
506
507 if (task->tk_status >= 0)
508 return 0;
509 if (timeout)
510 exception.timeout = *timeout;
511 task->tk_status = nfs4_async_handle_exception(task, server,
512 task->tk_status,
513 &exception);
514 if (exception.delay && timeout)
515 *timeout = exception.timeout;
516 if (exception.retry)
517 return -EAGAIN;
518 return 0;
519}
520
Weston Andros Adamsona5250de2013-09-03 15:18:49 -0400521/*
522 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
523 * or 'false' otherwise.
524 */
525static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
526{
527 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
528
529 if (flavor == RPC_AUTH_GSS_KRB5I ||
530 flavor == RPC_AUTH_GSS_KRB5P)
531 return true;
532
533 return false;
534}
Trond Myklebust65de8722008-12-23 15:21:44 -0500535
Trond Myklebust452e9352010-07-31 14:29:06 -0400536static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 spin_lock(&clp->cl_lock);
539 if (time_before(clp->cl_last_renewal,timestamp))
540 clp->cl_last_renewal = timestamp;
541 spin_unlock(&clp->cl_lock);
542}
543
Trond Myklebust452e9352010-07-31 14:29:06 -0400544static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
545{
Trond Myklebustbe824162015-07-05 14:50:46 -0400546 struct nfs_client *clp = server->nfs_client;
547
548 if (!nfs4_has_session(clp))
549 do_renew_lease(clp, timestamp);
Trond Myklebust452e9352010-07-31 14:29:06 -0400550}
551
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400552struct nfs4_call_sync_data {
553 const struct nfs_server *seq_server;
554 struct nfs4_sequence_args *seq_args;
555 struct nfs4_sequence_res *seq_res;
556};
557
Trond Myklebustbe3a5d22015-06-23 19:51:55 +0800558void nfs4_init_sequence(struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res, int cache_reply)
Chuck Levera9c92d62013-08-09 12:48:18 -0400560{
561 args->sa_slot = NULL;
562 args->sa_cache_this = cache_reply;
563 args->sa_privileged = 0;
564
565 res->sr_slot = NULL;
566}
567
568static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
569{
570 args->sa_privileged = 1;
571}
572
Peng Taocb04ad22014-06-11 05:24:15 +0800573int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
574 struct nfs4_sequence_args *args,
575 struct nfs4_sequence_res *res,
576 struct rpc_task *task)
Chuck Lever3bd23842013-08-09 12:49:19 -0400577{
Chuck Lever3bd23842013-08-09 12:49:19 -0400578 struct nfs4_slot *slot;
579
580 /* slot already allocated? */
581 if (res->sr_slot != NULL)
582 goto out_start;
583
584 spin_lock(&tbl->slot_tbl_lock);
585 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
586 goto out_sleep;
587
588 slot = nfs4_alloc_slot(tbl);
589 if (IS_ERR(slot)) {
590 if (slot == ERR_PTR(-ENOMEM))
591 task->tk_timeout = HZ >> 2;
592 goto out_sleep;
593 }
594 spin_unlock(&tbl->slot_tbl_lock);
595
596 args->sa_slot = slot;
597 res->sr_slot = slot;
598
599out_start:
600 rpc_call_start(task);
601 return 0;
602
603out_sleep:
604 if (args->sa_privileged)
605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
611}
Peng Taocb04ad22014-06-11 05:24:15 +0800612EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
Chuck Lever3bd23842013-08-09 12:49:19 -0400613
614static int nfs40_sequence_done(struct rpc_task *task,
615 struct nfs4_sequence_res *res)
616{
617 struct nfs4_slot *slot = res->sr_slot;
618 struct nfs4_slot_table *tbl;
619
Trond Myklebustcab92c12014-01-29 12:12:15 -0500620 if (slot == NULL)
Chuck Lever3bd23842013-08-09 12:49:19 -0400621 goto out;
622
623 tbl = slot->table;
624 spin_lock(&tbl->slot_tbl_lock);
625 if (!nfs41_wake_and_assign_slot(tbl, slot))
626 nfs4_free_slot(tbl, slot);
627 spin_unlock(&tbl->slot_tbl_lock);
628
629 res->sr_slot = NULL;
630out:
631 return 1;
632}
633
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400634#if defined(CONFIG_NFS_V4_1)
635
Trond Myklebustd185a332010-06-16 09:52:25 -0400636static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
Andy Adamson13615872009-04-01 09:22:17 -0400637{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500638 struct nfs4_session *session;
Andy Adamson13615872009-04-01 09:22:17 -0400639 struct nfs4_slot_table *tbl;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500640 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500641 bool send_new_highest_used_slotid = false;
Andy Adamson13615872009-04-01 09:22:17 -0400642
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500643 tbl = slot->table;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500644 session = tbl->session;
Andy Adamsonea028ac2009-12-04 15:55:38 -0500645
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500646 spin_lock(&tbl->slot_tbl_lock);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500647 /* Be nice to the server: try to ensure that the last transmitted
648 * value for highest_user_slotid <= target_highest_slotid
649 */
650 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
651 send_new_highest_used_slotid = true;
652
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500653 if (nfs41_wake_and_assign_slot(tbl, slot)) {
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500654 send_new_highest_used_slotid = false;
655 goto out_unlock;
656 }
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500657 nfs4_free_slot(tbl, slot);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500658
659 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
660 send_new_highest_used_slotid = false;
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500661out_unlock:
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500662 spin_unlock(&tbl->slot_tbl_lock);
Benny Halevydfb4f3092010-09-24 09:17:01 -0400663 res->sr_slot = NULL;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500664 if (send_new_highest_used_slotid)
Anna Schumaker3f10a6a2015-07-13 14:01:31 -0400665 nfs41_notify_server(session->clp);
Andy Adamson13615872009-04-01 09:22:17 -0400666}
667
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500668int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Andy Adamsonb0df8062009-04-01 09:22:18 -0400669{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500670 struct nfs4_session *session;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500671 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebust14516c32010-07-31 14:29:06 -0400672 struct nfs_client *clp;
Trond Myklebustac20d162012-12-15 15:36:07 -0500673 bool interrupted = false;
Trond Myklebust85563072012-12-11 10:31:12 -0500674 int ret = 1;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400675
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500676 if (slot == NULL)
677 goto out_noaction;
Bryan Schumaker468f8612011-04-18 15:57:32 -0400678 /* don't increment the sequence number if the task wasn't sent */
679 if (!RPC_WAS_SENT(task))
Andy Adamsonb0df8062009-04-01 09:22:18 -0400680 goto out;
681
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500682 session = slot->table->session;
Trond Myklebust933602e2012-11-16 12:12:38 -0500683
Trond Myklebustac20d162012-12-15 15:36:07 -0500684 if (slot->interrupted) {
685 slot->interrupted = 0;
686 interrupted = true;
687 }
688
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400689 trace_nfs4_sequence_done(session, res);
Andy Adamson691daf32009-12-04 15:55:39 -0500690 /* Check the SEQUENCE operation status */
Trond Myklebust14516c32010-07-31 14:29:06 -0400691 switch (res->sr_status) {
692 case 0:
Andy Adamsonb0df8062009-04-01 09:22:18 -0400693 /* Update the slot's sequence and clientid lease timer */
Trond Myklebust933602e2012-11-16 12:12:38 -0500694 ++slot->seq_nr;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500695 clp = session->clp;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500696 do_renew_lease(clp, res->sr_timestamp);
Alexandros Batsakis0629e372009-12-05 13:46:14 -0500697 /* Check sequence flags */
Trond Myklebustb15c7cd2015-07-05 15:01:36 -0400698 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
Trond Myklebust464ee9f2012-11-20 12:49:27 -0500699 nfs41_update_target_slotid(slot->table, slot, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400700 break;
Trond Myklebustac20d162012-12-15 15:36:07 -0500701 case 1:
702 /*
703 * sr_status remains 1 if an RPC level error occurred.
704 * The server may or may not have processed the sequence
705 * operation..
706 * Mark the slot as having hosted an interrupted RPC call.
707 */
708 slot->interrupted = 1;
709 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400710 case -NFS4ERR_DELAY:
711 /* The server detected a resend of the RPC call and
712 * returned NFS4ERR_DELAY as per Section 2.10.6.2
713 * of RFC5661.
714 */
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500715 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400716 __func__,
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500717 slot->slot_nr,
Trond Myklebust933602e2012-11-16 12:12:38 -0500718 slot->seq_nr);
Trond Myklebust14516c32010-07-31 14:29:06 -0400719 goto out_retry;
Trond Myklebust85563072012-12-11 10:31:12 -0500720 case -NFS4ERR_BADSLOT:
721 /*
722 * The slot id we used was probably retired. Try again
723 * using a different slot id.
724 */
Trond Myklebuste8794442012-12-15 13:56:18 -0500725 goto retry_nowait;
726 case -NFS4ERR_SEQ_MISORDERED:
727 /*
Trond Myklebustac20d162012-12-15 15:36:07 -0500728 * Was the last operation on this sequence interrupted?
729 * If so, retry after bumping the sequence number.
730 */
731 if (interrupted) {
732 ++slot->seq_nr;
733 goto retry_nowait;
734 }
735 /*
Trond Myklebuste8794442012-12-15 13:56:18 -0500736 * Could this slot have been previously retired?
737 * If so, then the server may be expecting seq_nr = 1!
738 */
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500739 if (slot->seq_nr != 1) {
740 slot->seq_nr = 1;
741 goto retry_nowait;
742 }
743 break;
Trond Myklebuste8794442012-12-15 13:56:18 -0500744 case -NFS4ERR_SEQ_FALSE_RETRY:
745 ++slot->seq_nr;
746 goto retry_nowait;
Trond Myklebust14516c32010-07-31 14:29:06 -0400747 default:
748 /* Just update the slot sequence no. */
Trond Myklebust933602e2012-11-16 12:12:38 -0500749 ++slot->seq_nr;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400750 }
751out:
752 /* The session may be reset by one of the error handlers. */
753 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
Trond Myklebustd185a332010-06-16 09:52:25 -0400754 nfs41_sequence_free_slot(res);
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500755out_noaction:
Trond Myklebust85563072012-12-11 10:31:12 -0500756 return ret;
Trond Myklebuste8794442012-12-15 13:56:18 -0500757retry_nowait:
758 if (rpc_restart_call_prepare(task)) {
759 task->tk_status = 0;
760 ret = 0;
761 }
762 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400763out_retry:
Trond Myklebustd05dd4e2010-07-31 14:29:07 -0400764 if (!rpc_restart_call(task))
Trond Myklebust14516c32010-07-31 14:29:06 -0400765 goto out;
766 rpc_delay(task, NFS4_POLL_RETRY_MAX);
767 return 0;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400768}
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500769EXPORT_SYMBOL_GPL(nfs41_sequence_done);
Andy Adamsonb0df8062009-04-01 09:22:18 -0400770
Peng Tao2c4b1312014-06-11 05:24:16 +0800771int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400772{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500773 if (res->sr_slot == NULL)
Trond Myklebust14516c32010-07-31 14:29:06 -0400774 return 1;
Chuck Lever3bd23842013-08-09 12:49:19 -0400775 if (!res->sr_slot->table->session)
776 return nfs40_sequence_done(task, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400777 return nfs41_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400778}
Peng Tao2c4b1312014-06-11 05:24:16 +0800779EXPORT_SYMBOL_GPL(nfs4_sequence_done);
Trond Myklebustdf896452010-06-16 09:52:26 -0400780
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000781int nfs41_setup_sequence(struct nfs4_session *session,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400782 struct nfs4_sequence_args *args,
783 struct nfs4_sequence_res *res,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400784 struct rpc_task *task)
785{
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400786 struct nfs4_slot *slot;
787 struct nfs4_slot_table *tbl;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400788
789 dprintk("--> %s\n", __func__);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400790 /* slot already allocated? */
Benny Halevydfb4f3092010-09-24 09:17:01 -0400791 if (res->sr_slot != NULL)
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400792 goto out_success;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400793
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400794 tbl = &session->fc_slot_table;
795
Trond Myklebust69d206b2012-11-22 13:21:02 -0500796 task->tk_timeout = 0;
797
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400798 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson774d5f12013-05-20 14:13:50 -0400799 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400800 !args->sa_privileged) {
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500801 /* The state manager will wait until the slot table is empty */
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500802 dprintk("%s session is draining\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400803 goto out_sleep;
Andy Adamsonb069d942009-04-01 09:22:43 -0400804 }
805
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500806 slot = nfs4_alloc_slot(tbl);
Trond Myklebust69d206b2012-11-22 13:21:02 -0500807 if (IS_ERR(slot)) {
808 /* If out of memory, try again in 1/4 second */
809 if (slot == ERR_PTR(-ENOMEM))
810 task->tk_timeout = HZ >> 2;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400811 dprintk("<-- %s: no free slots\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400812 goto out_sleep;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400813 }
814 spin_unlock(&tbl->slot_tbl_lock);
815
Trond Myklebust2b2fa712012-11-16 12:58:36 -0500816 args->sa_slot = slot;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400817
Chuck Levere8d92382013-08-09 12:47:51 -0400818 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500819 slot->slot_nr, slot->seq_nr);
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400820
Benny Halevydfb4f3092010-09-24 09:17:01 -0400821 res->sr_slot = slot;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500822 res->sr_timestamp = jiffies;
Trond Myklebust2a6e26c2010-06-16 09:52:25 -0400823 res->sr_status_flags = 0;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400824 /*
825 * sr_status is only set in decode_sequence, and so will remain
826 * set to 1 if an rpc level failure occurs.
827 */
828 res->sr_status = 1;
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400829 trace_nfs4_setup_sequence(session, args);
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400830out_success:
831 rpc_call_start(task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400832 return 0;
Trond Myklebust7b939a32012-11-01 15:19:46 -0400833out_sleep:
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400834 /* Privileged tasks are queued with top priority */
835 if (args->sa_privileged)
Trond Myklebust1e1093c2012-11-01 16:44:05 -0400836 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
837 NULL, RPC_PRIORITY_PRIVILEGED);
838 else
839 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400840 spin_unlock(&tbl->slot_tbl_lock);
841 return -EAGAIN;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400842}
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000843EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400844
Chuck Lever5a580e02013-08-09 12:48:09 -0400845static int nfs4_setup_sequence(const struct nfs_server *server,
846 struct nfs4_sequence_args *args,
847 struct nfs4_sequence_res *res,
848 struct rpc_task *task)
Andy Adamsonce5039c2009-04-01 09:22:13 -0400849{
Trond Myklebust035168a2010-06-16 09:52:26 -0400850 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400851 int ret = 0;
852
Chuck Lever3bd23842013-08-09 12:49:19 -0400853 if (!session)
Peng Taocb04ad22014-06-11 05:24:15 +0800854 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
855 args, res, task);
Trond Myklebust035168a2010-06-16 09:52:26 -0400856
Chuck Levere8d92382013-08-09 12:47:51 -0400857 dprintk("--> %s clp %p session %p sr_slot %u\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400858 __func__, session->clp, session, res->sr_slot ?
Chuck Levere8d92382013-08-09 12:47:51 -0400859 res->sr_slot->slot_nr : NFS4_NO_SLOT);
Trond Myklebust035168a2010-06-16 09:52:26 -0400860
Trond Myklebust9d12b212012-01-17 22:04:25 -0500861 ret = nfs41_setup_sequence(session, args, res, task);
Chuck Lever3bd23842013-08-09 12:49:19 -0400862
Andy Adamsonce5039c2009-04-01 09:22:13 -0400863 dprintk("<-- %s status=%d\n", __func__, ret);
864 return ret;
865}
866
Andy Adamsonce5039c2009-04-01 09:22:13 -0400867static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
868{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400869 struct nfs4_call_sync_data *data = calldata;
Trond Myklebust6ba7db32012-10-22 20:07:20 -0400870 struct nfs4_session *session = nfs4_get_session(data->seq_server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400871
Trond Myklebust035168a2010-06-16 09:52:26 -0400872 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
873
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400874 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400875}
876
Andy Adamson69ab40c2009-04-01 09:22:19 -0400877static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
878{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400879 struct nfs4_call_sync_data *data = calldata;
Andy Adamson69ab40c2009-04-01 09:22:19 -0400880
Trond Myklebust14516c32010-07-31 14:29:06 -0400881 nfs41_sequence_done(task, data->seq_res);
Andy Adamson69ab40c2009-04-01 09:22:19 -0400882}
883
Trond Myklebust17280172012-03-11 13:11:00 -0400884static const struct rpc_call_ops nfs41_call_sync_ops = {
Andy Adamsonce5039c2009-04-01 09:22:13 -0400885 .rpc_call_prepare = nfs41_call_sync_prepare,
Andy Adamson69ab40c2009-04-01 09:22:19 -0400886 .rpc_call_done = nfs41_call_sync_done,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400887};
888
Chuck Lever3bd23842013-08-09 12:49:19 -0400889#else /* !CONFIG_NFS_V4_1 */
890
Chuck Lever5a580e02013-08-09 12:48:09 -0400891static int nfs4_setup_sequence(const struct nfs_server *server,
892 struct nfs4_sequence_args *args,
893 struct nfs4_sequence_res *res,
894 struct rpc_task *task)
895{
Peng Taocb04ad22014-06-11 05:24:15 +0800896 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
897 args, res, task);
Chuck Lever5a580e02013-08-09 12:48:09 -0400898}
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400899
Peng Tao2c4b1312014-06-11 05:24:16 +0800900int nfs4_sequence_done(struct rpc_task *task,
901 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400902{
Chuck Lever3bd23842013-08-09 12:49:19 -0400903 return nfs40_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400904}
Peng Tao2c4b1312014-06-11 05:24:16 +0800905EXPORT_SYMBOL_GPL(nfs4_sequence_done);
Chuck Lever3bd23842013-08-09 12:49:19 -0400906
907#endif /* !CONFIG_NFS_V4_1 */
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400908
Chuck Lever9915ea72013-08-09 12:48:27 -0400909static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
910{
911 struct nfs4_call_sync_data *data = calldata;
912 nfs4_setup_sequence(data->seq_server,
913 data->seq_args, data->seq_res, task);
914}
915
916static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
917{
918 struct nfs4_call_sync_data *data = calldata;
919 nfs4_sequence_done(task, data->seq_res);
920}
921
922static const struct rpc_call_ops nfs40_call_sync_ops = {
923 .rpc_call_prepare = nfs40_call_sync_prepare,
924 .rpc_call_done = nfs40_call_sync_done,
925};
926
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400927static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
Trond Myklebustad389da2007-06-05 12:30:00 -0400928 struct nfs_server *server,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500929 struct rpc_message *msg,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100930 struct nfs4_sequence_args *args,
931 struct nfs4_sequence_res *res)
Trond Myklebustad389da2007-06-05 12:30:00 -0400932{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100933 int ret;
934 struct rpc_task *task;
Chuck Lever9915ea72013-08-09 12:48:27 -0400935 struct nfs_client *clp = server->nfs_client;
936 struct nfs4_call_sync_data data = {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100937 .seq_server = server,
938 .seq_args = args,
939 .seq_res = res,
940 };
941 struct rpc_task_setup task_setup = {
942 .rpc_client = clnt,
943 .rpc_message = msg,
Chuck Lever9915ea72013-08-09 12:48:27 -0400944 .callback_ops = clp->cl_mvops->call_sync_ops,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100945 .callback_data = &data
946 };
947
948 task = rpc_run_task(&task_setup);
949 if (IS_ERR(task))
950 ret = PTR_ERR(task);
951 else {
952 ret = task->tk_status;
Trond Myklebustad389da2007-06-05 12:30:00 -0400953 rpc_put_task(task);
954 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100955 return ret;
956}
957
Bryan Schumaker7c513052011-03-24 17:12:24 +0000958int nfs4_call_sync(struct rpc_clnt *clnt,
959 struct nfs_server *server,
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res,
963 int cache_reply)
964{
Chuck Levera9c92d62013-08-09 12:48:18 -0400965 nfs4_init_sequence(args, res, cache_reply);
Chuck Lever9915ea72013-08-09 12:48:27 -0400966 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000967}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
969static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
970{
971 struct nfs_inode *nfsi = NFS_I(dir);
972
973 spin_lock(&dir->i_lock);
Trond Myklebust359d7d12012-05-28 10:01:34 -0400974 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700975 if (!cinfo->atomic || cinfo->before != dir->i_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 nfs_force_lookup_revalidate(dir);
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700977 dir->i_version = cinfo->after;
Trond Myklebust3235b402015-02-26 19:52:06 -0500978 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
David Howellsde242c02012-12-20 21:52:38 +0000979 nfs_fscache_invalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 spin_unlock(&dir->i_lock);
981}
982
983struct nfs4_opendata {
984 struct kref kref;
985 struct nfs_openargs o_arg;
986 struct nfs_openres o_res;
987 struct nfs_open_confirmargs c_arg;
988 struct nfs_open_confirmres c_res;
Trond Myklebust6926afd2012-01-07 13:22:46 -0500989 struct nfs4_string owner_name;
990 struct nfs4_string group_name;
Kinglong Meea49c2692015-07-27 15:31:38 +0800991 struct nfs4_label *a_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 struct nfs_fattr f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400993 struct nfs4_label *f_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 struct dentry *dir;
Al Viro82a2c1b2011-06-22 18:30:55 -0400995 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 struct nfs4_state_owner *owner;
997 struct nfs4_state *state;
998 struct iattr attrs;
999 unsigned long timestamp;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001000 unsigned int rpc_done : 1;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04001001 unsigned int file_created : 1;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001002 unsigned int is_recover : 1;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001003 int rpc_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 int cancelled;
1005};
Trond Myklebustdecf4912005-10-27 22:12:39 -04001006
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001007static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1008 int err, struct nfs4_exception *exception)
1009{
1010 if (err != -EINVAL)
1011 return false;
1012 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1013 return false;
1014 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1015 exception->retry = 1;
1016 return true;
1017}
1018
Trond Myklebust6ae37332015-01-30 14:21:14 -05001019static u32
1020nfs4_map_atomic_open_share(struct nfs_server *server,
1021 fmode_t fmode, int openflags)
1022{
1023 u32 res = 0;
1024
1025 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1026 case FMODE_READ:
1027 res = NFS4_SHARE_ACCESS_READ;
1028 break;
1029 case FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_WRITE;
1031 break;
1032 case FMODE_READ|FMODE_WRITE:
1033 res = NFS4_SHARE_ACCESS_BOTH;
1034 }
1035 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1036 goto out;
1037 /* Want no delegation if we're using O_DIRECT */
1038 if (openflags & O_DIRECT)
1039 res |= NFS4_SHARE_WANT_NO_DELEG;
1040out:
1041 return res;
1042}
1043
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001044static enum open_claim_type4
1045nfs4_map_atomic_open_claim(struct nfs_server *server,
1046 enum open_claim_type4 claim)
1047{
1048 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1049 return claim;
1050 switch (claim) {
1051 default:
1052 return claim;
1053 case NFS4_OPEN_CLAIM_FH:
1054 return NFS4_OPEN_CLAIM_NULL;
1055 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1056 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1058 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1059 }
1060}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062static void nfs4_init_opendata_res(struct nfs4_opendata *p)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001063{
1064 p->o_res.f_attr = &p->f_attr;
David Quigley1775fd32013-05-22 12:50:42 -04001065 p->o_res.f_label = p->f_label;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001066 p->o_res.seqid = p->o_arg.seqid;
1067 p->c_res.seqid = p->c_arg.seqid;
1068 p->o_res.server = p->o_arg.server;
Andy Adamson5f657532012-10-03 02:39:34 -04001069 p->o_res.access_request = p->o_arg.access;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001070 nfs_fattr_init(&p->f_attr);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001071 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001072}
1073
Al Viro82a2c1b2011-06-22 18:30:55 -04001074static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001075 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001076 const struct iattr *attrs,
David Quigley1775fd32013-05-22 12:50:42 -04001077 struct nfs4_label *label,
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001078 enum open_claim_type4 claim,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001079 gfp_t gfp_mask)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001080{
Al Viro82a2c1b2011-06-22 18:30:55 -04001081 struct dentry *parent = dget_parent(dentry);
David Howells2b0143b2015-03-17 22:25:59 +00001082 struct inode *dir = d_inode(parent);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001083 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust63f5f792015-01-23 19:19:25 -05001084 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001085 struct nfs4_opendata *p;
1086
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001087 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001088 if (p == NULL)
1089 goto err;
David Quigley14c43f72013-05-22 12:50:43 -04001090
1091 p->f_label = nfs4_label_alloc(server, gfp_mask);
1092 if (IS_ERR(p->f_label))
1093 goto err_free_p;
1094
Kinglong Meea49c2692015-07-27 15:31:38 +08001095 p->a_label = nfs4_label_alloc(server, gfp_mask);
1096 if (IS_ERR(p->a_label))
1097 goto err_free_f;
1098
Trond Myklebust63f5f792015-01-23 19:19:25 -05001099 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1100 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05001101 if (IS_ERR(p->o_arg.seqid))
David Quigley14c43f72013-05-22 12:50:43 -04001102 goto err_free_label;
Al Viro82a2c1b2011-06-22 18:30:55 -04001103 nfs_sb_active(dentry->d_sb);
1104 p->dentry = dget(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001105 p->dir = parent;
1106 p->owner = sp;
1107 atomic_inc(&sp->so_count);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001108 p->o_arg.open_flags = flags;
1109 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
Trond Myklebust6ae37332015-01-30 14:21:14 -05001110 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1111 fmode, flags);
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001112 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1113 * will return permission denied for all bits until close */
1114 if (!(flags & O_EXCL)) {
1115 /* ask server to check for all possible rights as results
1116 * are cached */
1117 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1118 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001119 }
David Howells7539bba2006-08-22 20:06:09 -04001120 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001121 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1122 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
Al Viro82a2c1b2011-06-22 18:30:55 -04001123 p->o_arg.name = &dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001124 p->o_arg.server = server;
David Quigleyaa9c2662013-05-22 12:50:44 -04001125 p->o_arg.bitmask = nfs4_bitmask(server, label);
Trond Myklebust1549210f2012-06-05 09:16:47 -04001126 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
Kinglong Meea49c2692015-07-27 15:31:38 +08001127 p->o_arg.label = nfs4_label_copy(p->a_label, label);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001128 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1129 switch (p->o_arg.claim) {
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001130 case NFS4_OPEN_CLAIM_NULL:
1131 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1132 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1133 p->o_arg.fh = NFS_FH(dir);
1134 break;
1135 case NFS4_OPEN_CLAIM_PREVIOUS:
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1138 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
David Howells2b0143b2015-03-17 22:25:59 +00001139 p->o_arg.fh = NFS_FH(d_inode(dentry));
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001140 }
Trond Myklebust536e43d2012-01-17 22:04:26 -05001141 if (attrs != NULL && attrs->ia_valid != 0) {
Trond Myklebustc281fa9c2013-08-20 21:06:49 -04001142 __u32 verf[2];
Trond Myklebustd77d76f2010-06-16 09:52:27 -04001143
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001144 p->o_arg.u.attrs = &p->attrs;
1145 memcpy(&p->attrs, attrs, sizeof(p->attrs));
Chuck Levercd937102012-03-02 17:14:31 -05001146
1147 verf[0] = jiffies;
1148 verf[1] = current->pid;
1149 memcpy(p->o_arg.u.verifier.data, verf,
1150 sizeof(p->o_arg.u.verifier.data));
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001151 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001152 p->c_arg.fh = &p->o_res.fh;
1153 p->c_arg.stateid = &p->o_res.stateid;
1154 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001155 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001156 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001157 return p;
David Quigley14c43f72013-05-22 12:50:43 -04001158
1159err_free_label:
Kinglong Meea49c2692015-07-27 15:31:38 +08001160 nfs4_label_free(p->a_label);
1161err_free_f:
David Quigley14c43f72013-05-22 12:50:43 -04001162 nfs4_label_free(p->f_label);
1163err_free_p:
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001164 kfree(p);
1165err:
1166 dput(parent);
1167 return NULL;
1168}
1169
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001170static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001171{
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001172 struct nfs4_opendata *p = container_of(kref,
1173 struct nfs4_opendata, kref);
Al Viro82a2c1b2011-06-22 18:30:55 -04001174 struct super_block *sb = p->dentry->d_sb;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001175
1176 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001177 if (p->state != NULL)
1178 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001179 nfs4_put_state_owner(p->owner);
David Quigley14c43f72013-05-22 12:50:43 -04001180
Kinglong Meea49c2692015-07-27 15:31:38 +08001181 nfs4_label_free(p->a_label);
David Quigley14c43f72013-05-22 12:50:43 -04001182 nfs4_label_free(p->f_label);
1183
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001184 dput(p->dir);
Al Viro82a2c1b2011-06-22 18:30:55 -04001185 dput(p->dentry);
1186 nfs_sb_deactive(sb);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001187 nfs_fattr_free_names(&p->f_attr);
Trond Myklebuste911b812014-03-26 13:24:37 -07001188 kfree(p->f_attr.mdsthreshold);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001189 kfree(p);
1190}
1191
1192static void nfs4_opendata_put(struct nfs4_opendata *p)
1193{
1194 if (p != NULL)
1195 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001196}
1197
Trond Myklebust06f814a2006-01-03 09:55:07 +01001198static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1199{
Trond Myklebust06f814a2006-01-03 09:55:07 +01001200 int ret;
1201
Trond Myklebust06f814a2006-01-03 09:55:07 +01001202 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +01001203 return ret;
1204}
1205
Trond Myklebust24311f82015-09-20 10:50:17 -04001206static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1207 fmode_t fmode)
1208{
1209 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1210 case FMODE_READ|FMODE_WRITE:
1211 return state->n_rdwr != 0;
1212 case FMODE_WRITE:
1213 return state->n_wronly != 0;
1214 case FMODE_READ:
1215 return state->n_rdonly != 0;
1216 }
1217 WARN_ON_ONCE(1);
1218 return false;
1219}
1220
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001221static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
Trond Myklebust6ee41262007-07-08 14:11:36 -04001222{
1223 int ret = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001224
Trond Myklebust536e43d2012-01-17 22:04:26 -05001225 if (open_mode & (O_EXCL|O_TRUNC))
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001226 goto out;
1227 switch (mode & (FMODE_READ|FMODE_WRITE)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001228 case FMODE_READ:
Trond Myklebust88069f72009-12-08 08:33:16 -05001229 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1230 && state->n_rdonly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001231 break;
1232 case FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001233 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1234 && state->n_wronly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001235 break;
1236 case FMODE_READ|FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001237 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1238 && state->n_rdwr != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001239 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001240out:
Trond Myklebust6ee41262007-07-08 14:11:36 -04001241 return ret;
1242}
1243
Trond Myklebust2a606182015-08-19 22:30:00 -05001244static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1245 enum open_claim_type4 claim)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001246{
Trond Myklebust652f89f2011-12-09 19:05:58 -05001247 if (delegation == NULL)
1248 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001249 if ((delegation->type & fmode) != fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001250 return 0;
Trond Myklebustd25be542013-02-05 11:43:28 -05001251 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1252 return 0;
Trond Myklebust2a606182015-08-19 22:30:00 -05001253 switch (claim) {
1254 case NFS4_OPEN_CLAIM_NULL:
1255 case NFS4_OPEN_CLAIM_FH:
1256 break;
1257 case NFS4_OPEN_CLAIM_PREVIOUS:
1258 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1259 break;
1260 default:
1261 return 0;
1262 }
Trond Myklebustb7391f42008-12-23 15:21:52 -05001263 nfs_mark_delegation_referenced(delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001264 return 1;
1265}
1266
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001267static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
Trond Myklebuste7616922006-01-03 09:55:13 +01001268{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001269 switch (fmode) {
Trond Myklebuste7616922006-01-03 09:55:13 +01001270 case FMODE_WRITE:
1271 state->n_wronly++;
1272 break;
1273 case FMODE_READ:
1274 state->n_rdonly++;
1275 break;
1276 case FMODE_READ|FMODE_WRITE:
1277 state->n_rdwr++;
1278 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001279 nfs4_state_set_mode_locked(state, state->state | fmode);
Trond Myklebuste7616922006-01-03 09:55:13 +01001280}
1281
Trond Myklebust4f14c192014-02-12 19:15:06 -05001282static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
Trond Myklebust003707c2007-07-05 18:07:55 -04001283{
Trond Myklebust4f14c192014-02-12 19:15:06 -05001284 struct nfs_client *clp = state->owner->so_server->nfs_client;
1285 bool need_recover = false;
1286
1287 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1288 need_recover = true;
1289 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1290 need_recover = true;
1291 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1292 need_recover = true;
1293 if (need_recover)
1294 nfs4_state_mark_reclaim_nograce(clp, state);
1295}
1296
Trond Myklebuste999e802014-02-10 18:20:47 -05001297static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1298 nfs4_stateid *stateid)
1299{
1300 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1301 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001302 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1303 nfs_test_and_clear_all_open_stateid(state);
Trond Myklebuste999e802014-02-10 18:20:47 -05001304 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001305 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001306 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1307 return true;
1308 return false;
1309}
1310
Trond Myklebustf95549c2015-01-23 18:06:09 -05001311static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1312{
Trond Myklebust3c38cbe2015-07-22 13:46:13 -04001313 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1314 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001315 if (state->n_wronly)
1316 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1317 if (state->n_rdonly)
1318 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1319 if (state->n_rdwr)
1320 set_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebust3c38cbe2015-07-22 13:46:13 -04001321 set_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebustf95549c2015-01-23 18:06:09 -05001322}
1323
Trond Myklebust226056c2014-02-11 10:41:07 -05001324static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001325 nfs4_stateid *arg_stateid,
Trond Myklebust226056c2014-02-11 10:41:07 -05001326 nfs4_stateid *stateid, fmode_t fmode)
1327{
1328 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1329 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1330 case FMODE_WRITE:
1331 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1332 break;
1333 case FMODE_READ:
1334 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1335 break;
1336 case 0:
1337 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1338 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1339 clear_bit(NFS_OPEN_STATE, &state->flags);
1340 }
1341 if (stateid == NULL)
1342 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001343 /* Handle races with OPEN */
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001344 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1345 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1346 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
Trond Myklebustf95549c2015-01-23 18:06:09 -05001347 nfs_resync_open_stateid_locked(state);
Trond Myklebust226056c2014-02-11 10:41:07 -05001348 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001349 }
Trond Myklebust003707c2007-07-05 18:07:55 -04001350 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001351 nfs4_stateid_copy(&state->stateid, stateid);
1352 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust226056c2014-02-11 10:41:07 -05001353}
1354
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001355static void nfs_clear_open_stateid(struct nfs4_state *state,
1356 nfs4_stateid *arg_stateid,
1357 nfs4_stateid *stateid, fmode_t fmode)
Trond Myklebust226056c2014-02-11 10:41:07 -05001358{
1359 write_seqlock(&state->seqlock);
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001360 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
Trond Myklebust226056c2014-02-11 10:41:07 -05001361 write_sequnlock(&state->seqlock);
Trond Myklebust4f14c192014-02-12 19:15:06 -05001362 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1363 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust226056c2014-02-11 10:41:07 -05001364}
1365
Trond Myklebust003707c2007-07-05 18:07:55 -04001366static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1367{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001368 switch (fmode) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001369 case FMODE_READ:
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_WRITE:
1373 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1374 break;
1375 case FMODE_READ|FMODE_WRITE:
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001378 if (!nfs_need_update_open_stateid(state, stateid))
1379 return;
1380 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1381 nfs4_stateid_copy(&state->stateid, stateid);
1382 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001383}
1384
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001385static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386{
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001387 /*
1388 * Protect the call to nfs4_state_set_mode_locked and
1389 * serialise the stateid update
1390 */
Andrew Elble361cad32015-12-02 09:20:57 -05001391 spin_lock(&state->owner->so_lock);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001392 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001393 if (deleg_stateid != NULL) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001394 nfs4_stateid_copy(&state->stateid, deleg_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001395 set_bit(NFS_DELEGATED_STATE, &state->flags);
1396 }
1397 if (open_stateid != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001398 nfs_set_open_stateid_locked(state, open_stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001399 write_sequnlock(&state->seqlock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001400 update_open_stateflags(state, fmode);
Trond Myklebustec073422005-10-20 14:22:47 -07001401 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402}
1403
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001404static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001405{
1406 struct nfs_inode *nfsi = NFS_I(state->inode);
1407 struct nfs_delegation *deleg_cur;
1408 int ret = 0;
1409
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001410 fmode &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust34310432008-12-23 15:21:38 -05001411
1412 rcu_read_lock();
1413 deleg_cur = rcu_dereference(nfsi->delegation);
1414 if (deleg_cur == NULL)
1415 goto no_delegation;
1416
1417 spin_lock(&deleg_cur->lock);
Trond Myklebust17f26b12013-08-21 15:48:42 -04001418 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
Trond Myklebustd25be542013-02-05 11:43:28 -05001419 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001420 (deleg_cur->type & fmode) != fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001421 goto no_delegation_unlock;
1422
1423 if (delegation == NULL)
1424 delegation = &deleg_cur->stateid;
Trond Myklebustf597c532012-03-04 18:13:56 -05001425 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
Trond Myklebust34310432008-12-23 15:21:38 -05001426 goto no_delegation_unlock;
1427
Trond Myklebustb7391f42008-12-23 15:21:52 -05001428 nfs_mark_delegation_referenced(deleg_cur);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001429 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001430 ret = 1;
1431no_delegation_unlock:
1432 spin_unlock(&deleg_cur->lock);
1433no_delegation:
1434 rcu_read_unlock();
1435
1436 if (!ret && open_stateid != NULL) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001437 __update_open_stateid(state, open_stateid, NULL, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001438 ret = 1;
1439 }
Trond Myklebust4f14c192014-02-12 19:15:06 -05001440 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1441 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust34310432008-12-23 15:21:38 -05001442
1443 return ret;
1444}
1445
Trond Myklebust39071e62015-01-24 15:07:56 -05001446static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1447 const nfs4_stateid *stateid)
1448{
1449 struct nfs4_state *state = lsp->ls_state;
1450 bool ret = false;
1451
1452 spin_lock(&state->state_lock);
1453 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1454 goto out_noupdate;
1455 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1456 goto out_noupdate;
1457 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1458 ret = true;
1459out_noupdate:
1460 spin_unlock(&state->state_lock);
1461 return ret;
1462}
Trond Myklebust34310432008-12-23 15:21:38 -05001463
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001464static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001465{
1466 struct nfs_delegation *delegation;
1467
1468 rcu_read_lock();
1469 delegation = rcu_dereference(NFS_I(inode)->delegation);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001470 if (delegation == NULL || (delegation->type & fmode) == fmode) {
Trond Myklebustaac00a82007-07-05 19:02:21 -04001471 rcu_read_unlock();
1472 return;
1473 }
1474 rcu_read_unlock();
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04001475 nfs4_inode_return_delegation(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001476}
1477
Trond Myklebust6ee41262007-07-08 14:11:36 -04001478static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001479{
1480 struct nfs4_state *state = opendata->state;
1481 struct nfs_inode *nfsi = NFS_I(state->inode);
1482 struct nfs_delegation *delegation;
Trond Myklebustf448bad2013-05-29 15:36:40 -04001483 int open_mode = opendata->o_arg.open_flags;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001484 fmode_t fmode = opendata->o_arg.fmode;
Trond Myklebust2a606182015-08-19 22:30:00 -05001485 enum open_claim_type4 claim = opendata->o_arg.claim;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001486 nfs4_stateid stateid;
1487 int ret = -EAGAIN;
1488
Trond Myklebustaac00a82007-07-05 19:02:21 -04001489 for (;;) {
Anna Schumaker61beef752014-09-03 14:15:40 -04001490 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001491 if (can_open_cached(state, fmode, open_mode)) {
Anna Schumaker61beef752014-09-03 14:15:40 -04001492 update_open_stateflags(state, fmode);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001493 spin_unlock(&state->owner->so_lock);
Anna Schumaker61beef752014-09-03 14:15:40 -04001494 goto out_return_state;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001495 }
Anna Schumaker61beef752014-09-03 14:15:40 -04001496 spin_unlock(&state->owner->so_lock);
Trond Myklebust34310432008-12-23 15:21:38 -05001497 rcu_read_lock();
1498 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebust2a606182015-08-19 22:30:00 -05001499 if (!can_open_delegated(delegation, fmode, claim)) {
Trond Myklebust34310432008-12-23 15:21:38 -05001500 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001501 break;
Trond Myklebust34310432008-12-23 15:21:38 -05001502 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001503 /* Save the delegation */
Trond Myklebustf597c532012-03-04 18:13:56 -05001504 nfs4_stateid_copy(&stateid, &delegation->stateid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001505 rcu_read_unlock();
Trond Myklebustfa332942013-04-09 12:56:52 -04001506 nfs_release_seqid(opendata->o_arg.seqid);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001507 if (!opendata->is_recover) {
1508 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1509 if (ret != 0)
1510 goto out;
1511 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001512 ret = -EAGAIN;
Trond Myklebust34310432008-12-23 15:21:38 -05001513
1514 /* Try to update the stateid using the delegation */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001515 if (update_open_stateid(state, NULL, &stateid, fmode))
Trond Myklebust34310432008-12-23 15:21:38 -05001516 goto out_return_state;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001517 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001518out:
1519 return ERR_PTR(ret);
1520out_return_state:
1521 atomic_inc(&state->count);
1522 return state;
1523}
1524
Andy Adamsone23008e2012-10-02 21:07:32 -04001525static void
1526nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1527{
1528 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1529 struct nfs_delegation *delegation;
1530 int delegation_flags = 0;
1531
1532 rcu_read_lock();
1533 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1534 if (delegation)
1535 delegation_flags = delegation->flags;
1536 rcu_read_unlock();
Trond Myklebust72d79ff2015-10-02 11:44:54 -04001537 switch (data->o_arg.claim) {
1538 default:
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1541 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001542 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1543 "returning a delegation for "
1544 "OPEN(CLAIM_DELEGATE_CUR)\n",
1545 clp->cl_hostname);
Trond Myklebust72d79ff2015-10-02 11:44:54 -04001546 return;
1547 }
1548 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
Andy Adamsone23008e2012-10-02 21:07:32 -04001549 nfs_inode_set_delegation(state->inode,
1550 data->owner->so_cred,
1551 &data->o_res);
1552 else
1553 nfs_inode_reclaim_delegation(state->inode,
1554 data->owner->so_cred,
1555 &data->o_res);
1556}
1557
1558/*
1559 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1560 * and update the nfs4_state.
1561 */
1562static struct nfs4_state *
1563_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1564{
1565 struct inode *inode = data->state->inode;
1566 struct nfs4_state *state = data->state;
1567 int ret;
1568
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001569 if (!data->rpc_done) {
1570 if (data->rpc_status) {
1571 ret = data->rpc_status;
1572 goto err;
1573 }
1574 /* cached opens have already been processed */
1575 goto update;
Andy Adamsone23008e2012-10-02 21:07:32 -04001576 }
1577
Andy Adamsone23008e2012-10-02 21:07:32 -04001578 ret = nfs_refresh_inode(inode, &data->f_attr);
1579 if (ret)
1580 goto err;
1581
1582 if (data->o_res.delegation_type != 0)
1583 nfs4_opendata_check_deleg(data, state);
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001584update:
Andy Adamsone23008e2012-10-02 21:07:32 -04001585 update_open_stateid(state, &data->o_res.stateid, NULL,
1586 data->o_arg.fmode);
Trond Myklebustd49f0422013-10-28 14:57:12 -04001587 atomic_inc(&state->count);
Andy Adamsone23008e2012-10-02 21:07:32 -04001588
1589 return state;
1590err:
1591 return ERR_PTR(ret);
1592
1593}
1594
1595static struct nfs4_state *
1596_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001597{
1598 struct inode *inode;
1599 struct nfs4_state *state = NULL;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001600 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001601
Trond Myklebustaac00a82007-07-05 19:02:21 -04001602 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001603 state = nfs4_try_open_cached(data);
Olga Kornievskaia9759b0f2015-11-24 13:29:42 -05001604 trace_nfs4_cached_open(data->state);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001605 goto out;
1606 }
1607
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001608 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001609 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001610 goto err;
David Quigley1775fd32013-05-22 12:50:42 -04001611 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001612 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -05001613 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001614 goto err;
1615 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001616 state = nfs4_get_open_state(inode, data->owner);
1617 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001618 goto err_put_inode;
Andy Adamsone23008e2012-10-02 21:07:32 -04001619 if (data->o_res.delegation_type != 0)
1620 nfs4_opendata_check_deleg(data, state);
Trond Myklebust34310432008-12-23 15:21:38 -05001621 update_open_stateid(state, &data->o_res.stateid, NULL,
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001622 data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001623 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001624out:
Trond Myklebust7aa262b52013-02-28 16:19:59 -08001625 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001626 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001627err_put_inode:
1628 iput(inode);
1629err:
1630 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001631}
1632
Andy Adamsone23008e2012-10-02 21:07:32 -04001633static struct nfs4_state *
1634nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1635{
1636 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1637 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1638 return _nfs4_opendata_to_nfs4_state(data);
1639}
1640
Trond Myklebust864472e2006-01-03 09:55:15 +01001641static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1642{
1643 struct nfs_inode *nfsi = NFS_I(state->inode);
1644 struct nfs_open_context *ctx;
1645
1646 spin_lock(&state->inode->i_lock);
1647 list_for_each_entry(ctx, &nfsi->open_files, list) {
1648 if (ctx->state != state)
1649 continue;
1650 get_nfs_open_context(ctx);
1651 spin_unlock(&state->inode->i_lock);
1652 return ctx;
1653 }
1654 spin_unlock(&state->inode->i_lock);
1655 return ERR_PTR(-ENOENT);
1656}
1657
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001658static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1659 struct nfs4_state *state, enum open_claim_type4 claim)
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001660{
1661 struct nfs4_opendata *opendata;
1662
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001663 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
David Quigley1775fd32013-05-22 12:50:42 -04001664 NULL, NULL, claim, GFP_NOFS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001665 if (opendata == NULL)
1666 return ERR_PTR(-ENOMEM);
1667 opendata->state = state;
1668 atomic_inc(&state->count);
1669 return opendata;
1670}
1671
Trond Myklebust24311f82015-09-20 10:50:17 -04001672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1673 fmode_t fmode)
Trond Myklebust864472e2006-01-03 09:55:15 +01001674{
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001675 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001676 int ret;
1677
Trond Myklebust24311f82015-09-20 10:50:17 -04001678 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
NeilBrown39f897f2015-06-29 14:28:54 +10001679 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001680 opendata->o_arg.open_flags = 0;
1681 opendata->o_arg.fmode = fmode;
Trond Myklebustbe36e182015-02-27 17:04:17 -05001682 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1683 NFS_SB(opendata->dentry->d_sb),
1684 fmode, 0);
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001685 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1686 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1687 nfs4_init_opendata_res(opendata);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001688 ret = _nfs4_recover_proc_open(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001689 if (ret != 0)
1690 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001691 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001692 if (IS_ERR(newstate))
1693 return PTR_ERR(newstate);
Trond Myklebust24311f82015-09-20 10:50:17 -04001694 if (newstate != opendata->state)
1695 ret = -ESTALE;
Al Viro643168c2011-06-22 18:20:23 -04001696 nfs4_close_state(newstate, fmode);
Trond Myklebust24311f82015-09-20 10:50:17 -04001697 return ret;
Trond Myklebust864472e2006-01-03 09:55:15 +01001698}
1699
1700static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1701{
Trond Myklebust864472e2006-01-03 09:55:15 +01001702 int ret;
1703
Trond Myklebust4f14c192014-02-12 19:15:06 -05001704 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1705 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1706 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1707 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001708 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001709 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04001710 clear_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001711 smp_rmb();
Trond Myklebust24311f82015-09-20 10:50:17 -04001712 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1713 if (ret != 0)
1714 return ret;
1715 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1716 if (ret != 0)
1717 return ret;
1718 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1719 if (ret != 0)
1720 return ret;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001721 /*
1722 * We may have performed cached opens for all three recoveries.
1723 * Check if we need to update the current stateid.
1724 */
1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
Trond Myklebustf597c532012-03-04 18:13:56 -05001726 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001727 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001729 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001730 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001731 }
Trond Myklebust864472e2006-01-03 09:55:15 +01001732 return 0;
1733}
1734
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735/*
1736 * OPEN_RECLAIM:
1737 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 */
Trond Myklebust539cd032007-06-05 11:46:42 -04001739static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001741 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +01001742 struct nfs4_opendata *opendata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001743 fmode_t delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 int status;
1745
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001746 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1747 NFS4_OPEN_CLAIM_PREVIOUS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001748 if (IS_ERR(opendata))
1749 return PTR_ERR(opendata);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001750 rcu_read_lock();
1751 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust15c831b2008-12-23 15:21:39 -05001752 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -04001753 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001754 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +01001755 opendata->o_arg.u.delegation_type = delegation_type;
1756 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001757 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758 return status;
1759}
1760
Trond Myklebust539cd032007-06-05 11:46:42 -04001761static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 struct nfs4_exception exception = { };
1765 int err;
1766 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04001767 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04001768 trace_nfs4_open_reclaim(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001769 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1770 continue;
Trond Myklebust168667c2010-10-19 19:47:49 -04001771 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00001772 break;
1773 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 } while (exception.retry);
1775 return err;
1776}
1777
Trond Myklebust864472e2006-01-03 09:55:15 +01001778static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1779{
1780 struct nfs_open_context *ctx;
1781 int ret;
1782
1783 ctx = nfs4_state_find_open_context(state);
1784 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04001785 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04001786 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001787 put_nfs_open_context(ctx);
1788 return ret;
1789}
1790
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001791static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792{
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001793 switch (err) {
1794 default:
1795 printk(KERN_ERR "NFS: %s: unhandled error "
1796 "%d.\n", __func__, err);
1797 case 0:
1798 case -ENOENT:
Trond Myklebust8eee52a2015-06-04 13:51:13 -04001799 case -EAGAIN:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001800 case -ESTALE:
1801 break;
1802 case -NFS4ERR_BADSESSION:
1803 case -NFS4ERR_BADSLOT:
1804 case -NFS4ERR_BAD_HIGH_SLOT:
1805 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1806 case -NFS4ERR_DEADSESSION:
1807 set_bit(NFS_DELEGATED_STATE, &state->flags);
1808 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1809 return -EAGAIN;
1810 case -NFS4ERR_STALE_CLIENTID:
1811 case -NFS4ERR_STALE_STATEID:
1812 set_bit(NFS_DELEGATED_STATE, &state->flags);
1813 case -NFS4ERR_EXPIRED:
1814 /* Don't recall a delegation if it was lost */
1815 nfs4_schedule_lease_recovery(server->nfs_client);
1816 return -EAGAIN;
Chuck Lever352297b2013-10-17 14:13:24 -04001817 case -NFS4ERR_MOVED:
1818 nfs4_schedule_migration_recovery(server);
1819 return -EAGAIN;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04001820 case -NFS4ERR_LEASE_MOVED:
1821 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1822 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001823 case -NFS4ERR_DELEG_REVOKED:
1824 case -NFS4ERR_ADMIN_REVOKED:
1825 case -NFS4ERR_BAD_STATEID:
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001826 case -NFS4ERR_OPENMODE:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001827 nfs_inode_find_state_and_recover(state->inode,
1828 stateid);
1829 nfs4_schedule_stateid_recovery(server, state);
Trond Myklebust869f9df2014-11-10 18:43:56 -05001830 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001831 case -NFS4ERR_DELAY:
1832 case -NFS4ERR_GRACE:
1833 set_bit(NFS_DELEGATED_STATE, &state->flags);
1834 ssleep(1);
1835 return -EAGAIN;
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001836 case -ENOMEM:
1837 case -NFS4ERR_DENIED:
1838 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1839 return 0;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001840 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 return err;
1842}
1843
Trond Myklebust24311f82015-09-20 10:50:17 -04001844int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1845 struct nfs4_state *state, const nfs4_stateid *stateid,
1846 fmode_t type)
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001847{
1848 struct nfs_server *server = NFS_SERVER(state->inode);
1849 struct nfs4_opendata *opendata;
Trond Myklebust24311f82015-09-20 10:50:17 -04001850 int err = 0;
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001851
1852 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1853 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1854 if (IS_ERR(opendata))
1855 return PTR_ERR(opendata);
1856 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
Jeff Layton5e99b532015-10-02 13:14:37 -04001857 write_seqlock(&state->seqlock);
1858 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1859 write_sequnlock(&state->seqlock);
Trond Myklebust24311f82015-09-20 10:50:17 -04001860 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1861 switch (type & (FMODE_READ|FMODE_WRITE)) {
1862 case FMODE_READ|FMODE_WRITE:
1863 case FMODE_WRITE:
1864 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1865 if (err)
1866 break;
1867 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1868 if (err)
1869 break;
1870 case FMODE_READ:
1871 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1872 }
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001873 nfs4_opendata_put(opendata);
1874 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1875}
1876
Chuck Leverbe05c862013-08-09 12:49:47 -04001877static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1878{
1879 struct nfs4_opendata *data = calldata;
1880
Peng Taocb04ad22014-06-11 05:24:15 +08001881 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1882 &data->c_arg.seq_args, &data->c_res.seq_res, task);
Chuck Leverbe05c862013-08-09 12:49:47 -04001883}
1884
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001885static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1886{
1887 struct nfs4_opendata *data = calldata;
1888
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001889 nfs40_sequence_done(task, &data->c_res.seq_res);
Chuck Leverbe05c862013-08-09 12:49:47 -04001890
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001891 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001892 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001893 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
Trond Myklebustbb226292008-01-02 15:19:18 -05001894 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001895 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -04001896 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001897 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001898}
1899
1900static void nfs4_open_confirm_release(void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1903 struct nfs4_state *state = NULL;
1904
1905 /* If this request hasn't been cancelled, do nothing */
1906 if (data->cancelled == 0)
1907 goto out_free;
1908 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001909 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001910 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001911 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001912 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001913 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001914out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001915 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001916}
1917
1918static const struct rpc_call_ops nfs4_open_confirm_ops = {
Chuck Leverbe05c862013-08-09 12:49:47 -04001919 .rpc_call_prepare = nfs4_open_confirm_prepare,
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001920 .rpc_call_done = nfs4_open_confirm_done,
1921 .rpc_release = nfs4_open_confirm_release,
1922};
1923
1924/*
1925 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1926 */
1927static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1928{
David Howells2b0143b2015-03-17 22:25:59 +00001929 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001930 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001931 struct rpc_message msg = {
1932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1933 .rpc_argp = &data->c_arg,
1934 .rpc_resp = &data->c_res,
1935 .rpc_cred = data->owner->so_cred,
1936 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001937 struct rpc_task_setup task_setup_data = {
1938 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001939 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001940 .callback_ops = &nfs4_open_confirm_ops,
1941 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001942 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001943 .flags = RPC_TASK_ASYNC,
1944 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 int status;
1946
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001947 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001948 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001949 data->rpc_done = 0;
1950 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001951 data->timestamp = jiffies;
Benjamin Coddingtone92c1e02015-10-01 09:17:33 -04001952 if (data->is_recover)
1953 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
Trond Myklebustc970aa82007-07-14 15:39:59 -04001954 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05001955 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001956 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001957 status = nfs4_wait_for_completion_rpc_task(task);
1958 if (status != 0) {
1959 data->cancelled = 1;
1960 smp_wmb();
1961 } else
1962 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05001963 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 return status;
1965}
1966
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001967static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001969 struct nfs4_opendata *data = calldata;
1970 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust549b19c2013-04-16 18:42:34 -04001971 struct nfs_client *clp = sp->so_server->nfs_client;
Trond Myklebust2a606182015-08-19 22:30:00 -05001972 enum open_claim_type4 claim = data->o_arg.claim;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001973
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001974 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001975 goto out_wait;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001976 /*
1977 * Check if we still need to send an OPEN call, or if we can use
1978 * a delegation instead.
1979 */
1980 if (data->state != NULL) {
1981 struct nfs_delegation *delegation;
1982
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001983 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
Trond Myklebust6ee41262007-07-08 14:11:36 -04001984 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001985 rcu_read_lock();
1986 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
Trond Myklebust2a606182015-08-19 22:30:00 -05001987 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
Trond Myklebust652f89f2011-12-09 19:05:58 -05001988 goto unlock_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001989 rcu_read_unlock();
1990 }
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001991 /* Update client id. */
Trond Myklebust549b19c2013-04-16 18:42:34 -04001992 data->o_arg.clientid = clp->cl_clientid;
Trond Myklebust2a606182015-08-19 22:30:00 -05001993 switch (claim) {
1994 default:
1995 break;
Trond Myklebust8188df12013-04-23 14:31:19 -04001996 case NFS4_OPEN_CLAIM_PREVIOUS:
1997 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1998 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001999 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
Trond Myklebust8188df12013-04-23 14:31:19 -04002000 case NFS4_OPEN_CLAIM_FH:
2001 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -04002002 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2003 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01002004 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04002005 if (nfs4_setup_sequence(data->o_arg.server,
Andy Adamsond8985282009-04-01 09:22:21 -04002006 &data->o_arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002007 &data->o_res.seq_res,
2008 task) != 0)
2009 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust549b19c2013-04-16 18:42:34 -04002010
2011 /* Set the create mode (note dependency on the session type) */
2012 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2013 if (data->o_arg.open_flags & O_EXCL) {
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2015 if (nfs4_has_persistent_session(clp))
2016 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2017 else if (clp->cl_mvops->minor_version > 0)
2018 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2019 }
Trond Myklebust6ee41262007-07-08 14:11:36 -04002020 return;
Trond Myklebust652f89f2011-12-09 19:05:58 -05002021unlock_no_action:
Olga Kornievskaia9759b0f2015-11-24 13:29:42 -05002022 trace_nfs4_cached_open(data->state);
Trond Myklebust652f89f2011-12-09 19:05:58 -05002023 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04002024out_no_action:
2025 task->tk_action = NULL;
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002026out_wait:
Trond Myklebustb75ad4c2012-11-29 17:27:47 -05002027 nfs4_sequence_done(task, &data->o_res.seq_res);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002028}
2029
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002030static void nfs4_open_done(struct rpc_task *task, void *calldata)
2031{
2032 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002034 data->rpc_status = task->tk_status;
Andy Adamsond8985282009-04-01 09:22:21 -04002035
Trond Myklebust14516c32010-07-31 14:29:06 -04002036 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2037 return;
Andy Adamsond8985282009-04-01 09:22:21 -04002038
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002039 if (task->tk_status == 0) {
Trond Myklebust807d66d82012-10-02 17:09:00 -07002040 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2041 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -07002042 case S_IFREG:
2043 break;
2044 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002045 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -07002046 break;
2047 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002048 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -07002049 break;
2050 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002051 data->rpc_status = -ENOTDIR;
Trond Myklebust807d66d82012-10-02 17:09:00 -07002052 }
Trond Myklebust6f926b52005-10-18 14:20:18 -07002053 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01002054 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -04002055 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2056 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -07002057 }
Trond Myklebust3e309912007-07-07 13:19:59 -04002058 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002059}
Trond Myklebust6f926b52005-10-18 14:20:18 -07002060
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002061static void nfs4_open_release(void *calldata)
2062{
2063 struct nfs4_opendata *data = calldata;
2064 struct nfs4_state *state = NULL;
2065
2066 /* If this request hasn't been cancelled, do nothing */
2067 if (data->cancelled == 0)
2068 goto out_free;
2069 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04002070 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002071 goto out_free;
2072 /* In case we need an open_confirm, no cleanup! */
2073 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2074 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002075 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04002076 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04002077 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002078out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002079 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002080}
2081
2082static const struct rpc_call_ops nfs4_open_ops = {
2083 .rpc_call_prepare = nfs4_open_prepare,
2084 .rpc_call_done = nfs4_open_done,
2085 .rpc_release = nfs4_open_release,
2086};
2087
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002088static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002089{
David Howells2b0143b2015-03-17 22:25:59 +00002090 struct inode *dir = d_inode(data->dir);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002091 struct nfs_server *server = NFS_SERVER(dir);
2092 struct nfs_openargs *o_arg = &data->o_arg;
2093 struct nfs_openres *o_res = &data->o_res;
2094 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002095 struct rpc_message msg = {
2096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2097 .rpc_argp = o_arg,
2098 .rpc_resp = o_res,
2099 .rpc_cred = data->owner->so_cred,
2100 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002101 struct rpc_task_setup task_setup_data = {
2102 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002103 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002104 .callback_ops = &nfs4_open_ops,
2105 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05002106 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002107 .flags = RPC_TASK_ASYNC,
2108 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002109 int status;
2110
Chuck Levera9c92d62013-08-09 12:48:18 -04002111 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002112 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04002113 data->rpc_done = 0;
2114 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04002115 data->cancelled = 0;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04002116 data->is_recover = 0;
2117 if (isrecover) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04002118 nfs4_set_sequence_privileged(&o_arg->seq_args);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04002119 data->is_recover = 1;
2120 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04002121 task = rpc_run_task(&task_setup_data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002122 if (IS_ERR(task))
2123 return PTR_ERR(task);
2124 status = nfs4_wait_for_completion_rpc_task(task);
2125 if (status != 0) {
2126 data->cancelled = 1;
2127 smp_wmb();
2128 } else
2129 status = data->rpc_status;
2130 rpc_put_task(task);
2131
2132 return status;
2133}
2134
2135static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2136{
David Howells2b0143b2015-03-17 22:25:59 +00002137 struct inode *dir = d_inode(data->dir);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002138 struct nfs_openres *o_res = &data->o_res;
2139 int status;
2140
2141 status = nfs4_run_open_task(data, 1);
2142 if (status != 0 || !data->rpc_done)
2143 return status;
2144
Trond Myklebust6926afd2012-01-07 13:22:46 -05002145 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2146
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002147 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2148 status = _nfs4_proc_open_confirm(data);
2149 if (status != 0)
2150 return status;
2151 }
2152
2153 return status;
2154}
2155
Trond Myklebustf3792d62014-07-10 08:54:32 -04002156/*
2157 * Additional permission checks in order to distinguish between an
2158 * open for read, and an open for execute. This works around the
2159 * fact that NFSv4 OPEN treats read and execute permissions as being
2160 * the same.
2161 * Note that in the non-execute case, we want to turn off permission
2162 * checking if we just created a new file (POSIX open() semantics).
2163 */
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002164static int nfs4_opendata_access(struct rpc_cred *cred,
2165 struct nfs4_opendata *opendata,
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002166 struct nfs4_state *state, fmode_t fmode,
2167 int openflags)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002168{
2169 struct nfs_access_entry cache;
2170 u32 mask;
2171
2172 /* access call failed or for some reason the server doesn't
2173 * support any access modes -- defer access call until later */
2174 if (opendata->o_res.access_supported == 0)
2175 return 0;
2176
2177 mask = 0;
Trond Myklebustf3792d62014-07-10 08:54:32 -04002178 /*
2179 * Use openflags to check for exec, because fmode won't
2180 * always have FMODE_EXEC set when file open for exec.
2181 */
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002182 if (openflags & __FMODE_EXEC) {
2183 /* ONLY check for exec rights */
2184 mask = MAY_EXEC;
Trond Myklebustf3792d62014-07-10 08:54:32 -04002185 } else if ((fmode & FMODE_READ) && !opendata->file_created)
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002186 mask = MAY_READ;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002187
2188 cache.cred = cred;
2189 cache.jiffies = jiffies;
2190 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2191 nfs_access_add_cache(state->inode, &cache);
2192
Weston Andros Adamsonbbd3a8e2012-10-02 14:49:51 -07002193 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002194 return 0;
2195
2196 /* even though OPEN succeeded, access is denied. Close the file */
2197 nfs4_close_state(state, fmode);
Weston Andros Adamson998f40b2012-11-02 18:00:56 -04002198 return -EACCES;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002199}
2200
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002201/*
2202 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2203 */
2204static int _nfs4_proc_open(struct nfs4_opendata *data)
2205{
David Howells2b0143b2015-03-17 22:25:59 +00002206 struct inode *dir = d_inode(data->dir);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002207 struct nfs_server *server = NFS_SERVER(dir);
2208 struct nfs_openargs *o_arg = &data->o_arg;
2209 struct nfs_openres *o_res = &data->o_res;
2210 int status;
2211
2212 status = nfs4_run_open_task(data, 0);
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002213 if (!data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002214 return status;
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002215 if (status != 0) {
2216 if (status == -NFS4ERR_BADNAME &&
2217 !(o_arg->open_flags & O_CREAT))
2218 return -ENOENT;
2219 return status;
2220 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002221
Trond Myklebust6926afd2012-01-07 13:22:46 -05002222 nfs_fattr_map_and_free_names(server, &data->f_attr);
2223
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002224 if (o_arg->open_flags & O_CREAT) {
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002225 update_changeattr(dir, &o_res->cinfo);
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002226 if (o_arg->open_flags & O_EXCL)
2227 data->file_created = 1;
2228 else if (o_res->cinfo.before != o_res->cinfo.after)
2229 data->file_created = 1;
2230 }
Trond Myklebust0df5dd42010-04-11 16:48:44 -04002231 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2232 server->caps &= ~NFS_CAP_POSIX_LOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +01002234 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002236 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237 }
2238 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Andy Adamson8935ef62014-05-23 06:22:59 -07002239 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002240 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241}
2242
Andy Adamsond83217c2011-03-01 01:34:17 +00002243static int nfs4_recover_expired_lease(struct nfs_server *server)
2244{
2245 return nfs4_client_recover_expired_lease(server->nfs_client);
2246}
2247
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248/*
2249 * OPEN_EXPIRED:
2250 * reclaim state on the server after a network partition.
2251 * Assumes caller holds the appropriate lock
2252 */
Trond Myklebust539cd032007-06-05 11:46:42 -04002253static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254{
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002255 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +01002256 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002258 opendata = nfs4_open_recoverdata_alloc(ctx, state,
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002259 NFS4_OPEN_CLAIM_FH);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04002260 if (IS_ERR(opendata))
2261 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002262 ret = nfs4_open_recover(opendata, state);
Trond Myklebust35d05772008-04-05 15:54:17 -04002263 if (ret == -ESTALE)
Al Viro3d4ff432011-06-22 18:40:12 -04002264 d_drop(ctx->dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002265 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002266 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267}
2268
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002269static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +00002270{
Trond Myklebust539cd032007-06-05 11:46:42 -04002271 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +00002272 struct nfs4_exception exception = { };
2273 int err;
2274
2275 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04002276 err = _nfs4_open_expired(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04002277 trace_nfs4_open_expired(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002278 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2279 continue;
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002280 switch (err) {
2281 default:
2282 goto out;
2283 case -NFS4ERR_GRACE:
2284 case -NFS4ERR_DELAY:
2285 nfs4_handle_exception(server, err, &exception);
2286 err = 0;
2287 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00002288 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002289out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00002290 return err;
2291}
2292
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2294{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01002296 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002297
Trond Myklebust864472e2006-01-03 09:55:15 +01002298 ctx = nfs4_state_find_open_context(state);
2299 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04002300 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04002301 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01002302 put_nfs_open_context(ctx);
2303 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304}
2305
Trond Myklebust4dfd4f72014-10-17 15:10:25 +03002306static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2307{
2308 nfs_remove_bad_delegation(state->inode);
2309 write_seqlock(&state->seqlock);
2310 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2311 write_sequnlock(&state->seqlock);
2312 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2313}
2314
2315static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2316{
2317 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2318 nfs_finish_clear_delegation_stateid(state);
2319}
2320
2321static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2322{
2323 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2324 nfs40_clear_delegation_stateid(state);
2325 return nfs4_open_expired(sp, state);
2326}
2327
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002328#if defined(CONFIG_NFS_V4_1)
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002329static void nfs41_check_delegation_stateid(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002330{
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002331 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002332 nfs4_stateid stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002333 struct nfs_delegation *delegation;
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002334 struct rpc_cred *cred;
2335 int status;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002336
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002337 /* Get the delegation credential for use by test/free_stateid */
2338 rcu_read_lock();
2339 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002340 if (delegation == NULL) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002341 rcu_read_unlock();
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002342 return;
2343 }
2344
2345 nfs4_stateid_copy(&stateid, &delegation->stateid);
2346 cred = get_rpccred(delegation->cred);
2347 rcu_read_unlock();
2348 status = nfs41_test_stateid(server, &stateid, cred);
2349 trace_nfs4_test_delegation_stateid(state, NULL, status);
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002350
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002351 if (status != NFS_OK) {
2352 /* Free the stateid unless the server explicitly
2353 * informs us the stateid is unrecognized. */
2354 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002355 nfs41_free_stateid(server, &stateid, cred);
2356 nfs_finish_clear_delegation_stateid(state);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002357 }
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002358
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002359 put_rpccred(cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002360}
2361
2362/**
2363 * nfs41_check_open_stateid - possibly free an open stateid
2364 *
2365 * @state: NFSv4 state for an inode
2366 *
2367 * Returns NFS_OK if recovery for this stateid is now finished.
2368 * Otherwise a negative NFS4ERR value is returned.
2369 */
2370static int nfs41_check_open_stateid(struct nfs4_state *state)
2371{
2372 struct nfs_server *server = NFS_SERVER(state->inode);
Bryan Schumakerfcb6d9c2012-09-26 15:25:53 -04002373 nfs4_stateid *stateid = &state->open_stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002374 struct rpc_cred *cred = state->owner->so_cred;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002375 int status;
2376
2377 /* If a state reset has been done, test_stateid is unneeded */
2378 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2379 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2380 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2381 return -NFS4ERR_BAD_STATEID;
2382
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002383 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002384 trace_nfs4_test_open_stateid(state, NULL, status);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002385 if (status != NFS_OK) {
2386 /* Free the stateid unless the server explicitly
2387 * informs us the stateid is unrecognized. */
2388 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002389 nfs41_free_stateid(server, stateid, cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002390
2391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2392 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2393 clear_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04002394 clear_bit(NFS_OPEN_STATE, &state->flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002395 }
2396 return status;
2397}
2398
2399static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2400{
Chuck Levereb64cf92012-07-11 16:30:05 -04002401 int status;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002402
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002403 nfs41_check_delegation_stateid(state);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002404 status = nfs41_check_open_stateid(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04002405 if (status != NFS_OK)
2406 status = nfs4_open_expired(sp, state);
2407 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002408}
2409#endif
2410
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002412 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2413 * fields corresponding to attributes that were used to store the verifier.
2414 * Make sure we clobber those fields in the later setattr call
2415 */
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002416static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2417 struct iattr *sattr, struct nfs4_label **label)
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002418{
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002419 const u32 *attrset = opendata->o_res.attrset;
2420
2421 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002422 !(sattr->ia_valid & ATTR_ATIME_SET))
2423 sattr->ia_valid |= ATTR_ATIME;
2424
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002425 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002426 !(sattr->ia_valid & ATTR_MTIME_SET))
2427 sattr->ia_valid |= ATTR_MTIME;
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002428
2429 /* Except MODE, it seems harmless of setting twice. */
2430 if ((attrset[1] & FATTR4_WORD1_MODE))
2431 sattr->ia_valid &= ~ATTR_MODE;
2432
2433 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2434 *label = NULL;
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002435}
2436
Trond Myklebustc21443c2013-02-07 14:26:21 -05002437static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2438 fmode_t fmode,
2439 int flags,
Trond Myklebust3efb9722013-05-29 13:17:04 -04002440 struct nfs_open_context *ctx)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002441{
2442 struct nfs4_state_owner *sp = opendata->owner;
2443 struct nfs_server *server = sp->so_server;
Trond Myklebust275bb302013-05-29 13:11:28 -04002444 struct dentry *dentry;
Trond Myklebustc21443c2013-02-07 14:26:21 -05002445 struct nfs4_state *state;
2446 unsigned int seq;
2447 int ret;
2448
2449 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2450
2451 ret = _nfs4_proc_open(opendata);
Trond Myklebustdca780012014-10-23 19:23:03 +03002452 if (ret != 0)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002453 goto out;
2454
2455 state = nfs4_opendata_to_nfs4_state(opendata);
2456 ret = PTR_ERR(state);
2457 if (IS_ERR(state))
2458 goto out;
2459 if (server->caps & NFS_CAP_POSIX_LOCK)
2460 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2461
Trond Myklebust275bb302013-05-29 13:11:28 -04002462 dentry = opendata->dentry;
David Howells2b0143b2015-03-17 22:25:59 +00002463 if (d_really_is_negative(dentry)) {
Al Viro668d0cd2016-03-08 12:44:17 -05002464 struct dentry *alias;
Trond Myklebust275bb302013-05-29 13:11:28 -04002465 d_drop(dentry);
Al Viro668d0cd2016-03-08 12:44:17 -05002466 alias = d_exact_alias(dentry, state->inode);
2467 if (!alias)
2468 alias = d_splice_alias(igrab(state->inode), dentry);
2469 /* d_splice_alias() can't fail here - it's a non-directory */
2470 if (alias) {
Trond Myklebust275bb302013-05-29 13:11:28 -04002471 dput(ctx->dentry);
Al Viro668d0cd2016-03-08 12:44:17 -05002472 ctx->dentry = dentry = alias;
Trond Myklebust275bb302013-05-29 13:11:28 -04002473 }
2474 nfs_set_verifier(dentry,
David Howells2b0143b2015-03-17 22:25:59 +00002475 nfs_save_change_attribute(d_inode(opendata->dir)));
Trond Myklebust275bb302013-05-29 13:11:28 -04002476 }
2477
Trond Myklebustc21443c2013-02-07 14:26:21 -05002478 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2479 if (ret != 0)
2480 goto out;
2481
Trond Myklebust3efb9722013-05-29 13:17:04 -04002482 ctx->state = state;
David Howells2b0143b2015-03-17 22:25:59 +00002483 if (d_inode(dentry) == state->inode) {
Trond Myklebustc45ffdd2013-05-29 13:34:46 -04002484 nfs_inode_attach_open_context(ctx);
2485 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2486 nfs4_schedule_stateid_recovery(server, state);
2487 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002488out:
2489 return ret;
2490}
2491
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002492/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002493 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 */
Andy Adamson82be4172012-05-23 05:02:35 -04002495static int _nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002496 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002497 int flags,
2498 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002499 struct nfs4_label *label,
2500 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501{
2502 struct nfs4_state_owner *sp;
2503 struct nfs4_state *state = NULL;
2504 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002505 struct nfs4_opendata *opendata;
Trond Myklebust4197a052013-05-29 12:37:49 -04002506 struct dentry *dentry = ctx->dentry;
2507 struct rpc_cred *cred = ctx->cred;
2508 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2509 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002510 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
David Quigley1775fd32013-05-22 12:50:42 -04002511 struct nfs4_label *olabel = NULL;
Trond Myklebustaac00a82007-07-05 19:02:21 -04002512 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513
2514 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515 status = -ENOMEM;
Trond Myklebustd1e284d2012-01-17 22:04:24 -05002516 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2517 if (sp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2519 goto out_err;
2520 }
Trond Myklebust58d97142006-01-03 09:55:24 +01002521 status = nfs4_recover_expired_lease(server);
2522 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002523 goto err_put_state_owner;
David Howells2b0143b2015-03-17 22:25:59 +00002524 if (d_really_is_positive(dentry))
2525 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
Trond Myklebust58d97142006-01-03 09:55:24 +01002526 status = -ENOMEM;
David Howells2b0143b2015-03-17 22:25:59 +00002527 if (d_really_is_positive(dentry))
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002528 claim = NFS4_OPEN_CLAIM_FH;
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002529 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002530 label, claim, GFP_KERNEL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002531 if (opendata == NULL)
Trond Myklebust95d35cb2008-12-23 15:21:45 -05002532 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533
David Quigley14c43f72013-05-22 12:50:43 -04002534 if (label) {
2535 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2536 if (IS_ERR(olabel)) {
2537 status = PTR_ERR(olabel);
2538 goto err_opendata_put;
2539 }
2540 }
2541
Trond Myklebuste911b812014-03-26 13:24:37 -07002542 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2543 if (!opendata->f_attr.mdsthreshold) {
2544 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2545 if (!opendata->f_attr.mdsthreshold)
2546 goto err_free_label;
2547 }
Trond Myklebust1549210f2012-06-05 09:16:47 -04002548 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
Andy Adamson82be4172012-05-23 05:02:35 -04002549 }
David Howells2b0143b2015-03-17 22:25:59 +00002550 if (d_really_is_positive(dentry))
2551 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
Trond Myklebustaac00a82007-07-05 19:02:21 -04002552
Trond Myklebust3efb9722013-05-29 13:17:04 -04002553 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002554 if (status != 0)
David Quigley14c43f72013-05-22 12:50:43 -04002555 goto err_free_label;
Trond Myklebust3efb9722013-05-29 13:17:04 -04002556 state = ctx->state;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002557
NeilBrownefcbc042015-07-30 13:00:56 +10002558 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
Trond Myklebust549b19c2013-04-16 18:42:34 -04002559 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002560 nfs4_exclusive_attrset(opendata, sattr, &label);
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002561
2562 nfs_fattr_init(opendata->o_res.f_attr);
2563 status = nfs4_do_setattr(state->inode, cred,
2564 opendata->o_res.f_attr, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002565 state, label, olabel);
2566 if (status == 0) {
Trond Myklebustf0446362015-02-26 16:09:04 -05002567 nfs_setattr_update_inode(state->inode, sattr,
2568 opendata->o_res.f_attr);
David Quigleyaa9c2662013-05-22 12:50:44 -04002569 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
David Quigley1775fd32013-05-22 12:50:42 -04002570 }
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002571 }
Kinglong Meec5c3fb52015-08-26 21:11:39 +08002572 if (opened && opendata->file_created)
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002573 *opened |= FILE_CREATED;
Andy Adamson82be4172012-05-23 05:02:35 -04002574
Trond Myklebuste911b812014-03-26 13:24:37 -07002575 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
Andy Adamson82be4172012-05-23 05:02:35 -04002576 *ctx_th = opendata->f_attr.mdsthreshold;
Trond Myklebuste911b812014-03-26 13:24:37 -07002577 opendata->f_attr.mdsthreshold = NULL;
2578 }
Andy Adamson82be4172012-05-23 05:02:35 -04002579
David Quigley14c43f72013-05-22 12:50:43 -04002580 nfs4_label_free(olabel);
2581
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002582 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002584 return 0;
David Quigley14c43f72013-05-22 12:50:43 -04002585err_free_label:
2586 nfs4_label_free(olabel);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002587err_opendata_put:
2588 nfs4_opendata_put(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002589err_put_state_owner:
2590 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 return status;
2593}
2594
2595
Andy Adamson82be4172012-05-23 05:02:35 -04002596static struct nfs4_state *nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002597 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002598 int flags,
2599 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002600 struct nfs4_label *label,
2601 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602{
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002603 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002604 struct nfs4_exception exception = { };
2605 struct nfs4_state *res;
2606 int status;
2607
2608 do {
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002609 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
Trond Myklebust3efb9722013-05-29 13:17:04 -04002610 res = ctx->state;
Trond Myklebust42113a72013-08-12 16:19:27 -04002611 trace_nfs4_open_file(ctx, flags, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612 if (status == 0)
2613 break;
2614 /* NOTE: BAD_SEQID means the server and client disagree about the
2615 * book-keeping w.r.t. state-changing operations
2616 * (OPEN/CLOSE/LOCK/LOCKU...)
2617 * It is actually a sign of a bug on the client or on the server.
2618 *
2619 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07002620 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 * have unhashed the old state_owner for us, and that we can
2622 * therefore safely retry using a new one. We should still warn
2623 * the user though...
2624 */
2625 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust9a3ba432012-03-12 18:01:48 -04002626 pr_warn_ratelimited("NFS: v4 server %s "
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04002627 " returned a bad sequence-id error!\n",
2628 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 exception.retry = 1;
2630 continue;
2631 }
Trond Myklebust550f5742005-10-18 14:20:21 -07002632 /*
2633 * BAD_STATEID on OPEN means that the server cancelled our
2634 * state before it received the OPEN_CONFIRM.
2635 * Recover by retrying the request as per the discussion
2636 * on Page 181 of RFC3530.
2637 */
2638 if (status == -NFS4ERR_BAD_STATEID) {
2639 exception.retry = 1;
2640 continue;
2641 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04002642 if (status == -EAGAIN) {
2643 /* We must have found a delegation */
2644 exception.retry = 1;
2645 continue;
2646 }
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002647 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2648 continue;
2649 res = ERR_PTR(nfs4_handle_exception(server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002650 status, &exception));
2651 } while (exception.retry);
2652 return res;
2653}
2654
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002655static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2656 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002657 struct nfs4_state *state, struct nfs4_label *ilabel,
2658 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002660 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002662 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 .iap = sattr,
2664 .server = server,
2665 .bitmask = server->attr_bitmask,
David Quigley1775fd32013-05-22 12:50:42 -04002666 .label = ilabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667 };
2668 struct nfs_setattrres res = {
2669 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04002670 .label = olabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002671 .server = server,
2672 };
2673 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2675 .rpc_argp = &arg,
2676 .rpc_resp = &res,
2677 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01002679 unsigned long timestamp = jiffies;
Trond Myklebustee3ae842013-04-29 10:35:36 -04002680 fmode_t fmode;
2681 bool truncate;
Trond Myklebust65e43082005-08-16 11:49:44 -04002682 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683
David Quigleyaa9c2662013-05-22 12:50:44 -04002684 arg.bitmask = nfs4_bitmask(server, ilabel);
2685 if (ilabel)
2686 arg.bitmask = nfs4_bitmask(server, olabel);
2687
Trond Myklebust0e574af2005-10-27 22:12:38 -04002688 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689
Trond Myklebustee3ae842013-04-29 10:35:36 -04002690 /* Servers should only apply open mode checks for file size changes */
2691 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2692 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2693
2694 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2695 /* Use that stateid */
Trond Myklebust0418dae2014-03-04 13:48:16 -05002696 } else if (truncate && state != NULL) {
Trond Myklebust2a369152012-08-13 18:54:45 -04002697 struct nfs_lockowner lockowner = {
2698 .l_owner = current->files,
2699 .l_pid = current->tgid,
2700 };
Trond Myklebust0418dae2014-03-04 13:48:16 -05002701 if (!nfs4_valid_open_stateid(state))
2702 return -EBADF;
2703 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2704 &lockowner) == -EIO)
2705 return -EBADF;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00002706 } else
Trond Myklebustf597c532012-03-04 18:13:56 -05002707 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002708
Bryan Schumaker7c513052011-03-24 17:12:24 +00002709 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002710 if (status == 0 && state != NULL)
2711 renew_lease(server, timestamp);
Olga Kornievskaia48c95792015-11-24 13:29:41 -05002712 trace_nfs4_setattr(inode, &arg.stateid, status);
Trond Myklebust65e43082005-08-16 11:49:44 -04002713 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714}
2715
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002716static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2717 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002718 struct nfs4_state *state, struct nfs4_label *ilabel,
2719 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002721 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002722 struct nfs4_exception exception = {
2723 .state = state,
Trond Myklebust3114ea72012-03-07 16:39:06 -05002724 .inode = inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002725 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 int err;
2727 do {
David Quigley1775fd32013-05-22 12:50:42 -04002728 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
Trond Myklebust451146b2012-04-18 16:29:11 -04002729 switch (err) {
2730 case -NFS4ERR_OPENMODE:
Trond Myklebust721ccfb2013-04-29 11:11:58 -04002731 if (!(sattr->ia_valid & ATTR_SIZE)) {
2732 pr_warn_once("NFSv4: server %s is incorrectly "
2733 "applying open mode checks to "
2734 "a SETATTR that is not "
2735 "changing file size.\n",
2736 server->nfs_client->cl_hostname);
2737 }
Trond Myklebust451146b2012-04-18 16:29:11 -04002738 if (state && !(state->state & FMODE_WRITE)) {
2739 err = -EBADF;
2740 if (sattr->ia_valid & ATTR_OPEN)
2741 err = -EACCES;
2742 goto out;
2743 }
2744 }
2745 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 } while (exception.retry);
Trond Myklebust451146b2012-04-18 16:29:11 -04002747out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748 return err;
2749}
2750
Peng Tao500d7012015-09-22 11:35:22 +08002751static bool
2752nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2753{
2754 if (inode == NULL || !nfs_have_layout(inode))
2755 return false;
2756
2757 return pnfs_wait_on_layoutreturn(inode, task);
2758}
2759
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760struct nfs4_closedata {
2761 struct inode *inode;
2762 struct nfs4_state *state;
2763 struct nfs_closeargs arg;
2764 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002765 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002766 unsigned long timestamp;
Fred Isamanf7e89172011-01-06 11:36:32 +00002767 bool roc;
2768 u32 roc_barrier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769};
2770
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002771static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07002772{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002773 struct nfs4_closedata *calldata = data;
2774 struct nfs4_state_owner *sp = calldata->state->owner;
Al Viro643168c2011-06-22 18:20:23 -04002775 struct super_block *sb = calldata->state->inode->i_sb;
Trond Myklebust95121352005-10-18 14:20:12 -07002776
Fred Isamanf7e89172011-01-06 11:36:32 +00002777 if (calldata->roc)
2778 pnfs_roc_release(calldata->state->inode);
Trond Myklebust95121352005-10-18 14:20:12 -07002779 nfs4_put_open_state(calldata->state);
2780 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07002781 nfs4_put_state_owner(sp);
Trond Myklebust322b2b92013-01-11 16:39:51 -05002782 nfs_sb_deactive(sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002783 kfree(calldata);
2784}
2785
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002786static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002788 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790 struct nfs_server *server = NFS_SERVER(calldata->inode);
Trond Myklebust412f6c42014-08-25 22:09:08 -04002791 nfs4_stateid *res_stateid = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792
Chuck Levera3ca5652012-03-01 17:00:40 -05002793 dprintk("%s: begin!\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04002794 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2795 return;
Trond Myklebust42113a72013-08-12 16:19:27 -04002796 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002797 /* hmm. we are done with the inode, and in the process of freeing
2798 * the state_owner. we keep this around to process errors
2799 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002800 switch (task->tk_status) {
2801 case 0:
Trond Myklebust412f6c42014-08-25 22:09:08 -04002802 res_stateid = &calldata->res.stateid;
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002803 if (calldata->roc)
Fred Isamanf7e89172011-01-06 11:36:32 +00002804 pnfs_roc_set_barrier(state->inode,
2805 calldata->roc_barrier);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002806 renew_lease(server, calldata->timestamp);
Trond Myklebust412f6c42014-08-25 22:09:08 -04002807 break;
Trond Myklebust69794ad2013-11-20 12:57:19 -05002808 case -NFS4ERR_ADMIN_REVOKED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809 case -NFS4ERR_STALE_STATEID:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002810 case -NFS4ERR_OLD_STATEID:
2811 case -NFS4ERR_BAD_STATEID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 case -NFS4ERR_EXPIRED:
Trond Myklebust566fcec2015-01-23 15:32:46 -05002813 if (!nfs4_stateid_match(&calldata->arg.stateid,
Anna Schumaker369d6b72015-03-02 16:46:09 -05002814 &state->open_stateid)) {
Trond Myklebust566fcec2015-01-23 15:32:46 -05002815 rpc_restart_call_prepare(task);
2816 goto out_release;
2817 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002818 if (calldata->arg.fmode == 0)
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002819 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002820 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10002821 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
Trond Myklebust72211db2009-12-15 14:47:36 -05002822 rpc_restart_call_prepare(task);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002823 goto out_release;
2824 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825 }
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07002826 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2827 res_stateid, calldata->arg.fmode);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002828out_release:
Trond Myklebust72211db2009-12-15 14:47:36 -05002829 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebust516a6af2005-10-27 22:12:41 -04002830 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Chuck Levera3ca5652012-03-01 17:00:40 -05002831 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832}
2833
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002834static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002836 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07002837 struct nfs4_state *state = calldata->state;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002838 struct inode *inode = calldata->inode;
Trond Myklebustaee7af32014-08-25 22:33:12 -04002839 bool is_rdonly, is_wronly, is_rdwr;
Trond Myklebust88069f72009-12-08 08:33:16 -05002840 int call_close = 0;
Trond Myklebust95121352005-10-18 14:20:12 -07002841
Chuck Levera3ca5652012-03-01 17:00:40 -05002842 dprintk("%s: begin!\n", __func__);
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002843 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002844 goto out_wait;
Trond Myklebust003707c2007-07-05 18:07:55 -04002845
Trond Myklebust88069f72009-12-08 08:33:16 -05002846 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust4cecb762005-11-04 15:32:58 -05002847 spin_lock(&state->owner->so_lock);
Trond Myklebustaee7af32014-08-25 22:33:12 -04002848 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2849 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2850 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
Anna Schumaker369d6b72015-03-02 16:46:09 -05002851 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04002852 /* Calculate the change in open mode */
Trond Myklebustcd9288f2014-09-18 11:51:32 -04002853 calldata->arg.fmode = 0;
Trond Myklebuste7616922006-01-03 09:55:13 +01002854 if (state->n_rdwr == 0) {
Trond Myklebustcd9288f2014-09-18 11:51:32 -04002855 if (state->n_rdonly == 0)
2856 call_close |= is_rdonly;
2857 else if (is_rdonly)
2858 calldata->arg.fmode |= FMODE_READ;
2859 if (state->n_wronly == 0)
2860 call_close |= is_wronly;
2861 else if (is_wronly)
2862 calldata->arg.fmode |= FMODE_WRITE;
2863 } else if (is_rdwr)
2864 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2865
2866 if (calldata->arg.fmode == 0)
2867 call_close |= is_rdwr;
2868
Trond Myklebust5d422302013-03-14 16:57:48 -04002869 if (!nfs4_valid_open_stateid(state))
2870 call_close = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002871 spin_unlock(&state->owner->so_lock);
Trond Myklebust88069f72009-12-08 08:33:16 -05002872
2873 if (!call_close) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002874 /* Note: exit _without_ calling nfs4_close_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002875 goto out_no_action;
Trond Myklebust95121352005-10-18 14:20:12 -07002876 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002877
Peng Tao500d7012015-09-22 11:35:22 +08002878 if (nfs4_wait_on_layoutreturn(inode, task)) {
2879 nfs_release_seqid(calldata->arg.seqid);
2880 goto out_wait;
2881 }
2882
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002883 if (calldata->arg.fmode == 0)
Trond Myklebust88069f72009-12-08 08:33:16 -05002884 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002885 if (calldata->roc)
2886 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2887
Trond Myklebust6ae37332015-01-30 14:21:14 -05002888 calldata->arg.share_access =
2889 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2890 calldata->arg.fmode, 0);
Trond Myklebust88069f72009-12-08 08:33:16 -05002891
Trond Myklebust516a6af2005-10-27 22:12:41 -04002892 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002893 calldata->timestamp = jiffies;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002894 if (nfs4_setup_sequence(NFS_SERVER(inode),
Trond Myklebust9d12b212012-01-17 22:04:25 -05002895 &calldata->arg.seq_args,
2896 &calldata->res.seq_res,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002897 task) != 0)
2898 nfs_release_seqid(calldata->arg.seqid);
Chuck Levera3ca5652012-03-01 17:00:40 -05002899 dprintk("%s: done!\n", __func__);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002900 return;
2901out_no_action:
2902 task->tk_action = NULL;
2903out_wait:
2904 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002905}
2906
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002907static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002908 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002909 .rpc_call_done = nfs4_close_done,
2910 .rpc_release = nfs4_free_closedata,
2911};
2912
Peng Taofe08c542014-07-03 13:05:01 +08002913static bool nfs4_roc(struct inode *inode)
2914{
Trond Myklebust40dd4b72015-01-24 13:54:37 -05002915 if (!nfs_have_layout(inode))
Peng Taofe08c542014-07-03 13:05:01 +08002916 return false;
Peng Taofe08c542014-07-03 13:05:01 +08002917 return pnfs_roc(inode);
2918}
2919
Linus Torvalds1da177e2005-04-16 15:20:36 -07002920/*
2921 * It is possible for data to be read/written from a mem-mapped file
2922 * after the sys_close call (which hits the vfs layer as a flush).
2923 * This means that we can't safely call nfsv4 close on a file until
2924 * the inode is cleared. This in turn means that we are not good
2925 * NFSv4 citizens - we do not indicate to the server to update the file's
2926 * share state even when we are done with one of the three share
2927 * stateid's in the inode.
2928 *
2929 * NOTE: Caller must be holding the sp->so_owner semaphore!
2930 */
Trond Myklebust1f7977c2012-09-20 20:31:51 -04002931int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002932{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002933 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust63f5f792015-01-23 19:19:25 -05002934 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002935 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04002936 struct nfs4_state_owner *sp = state->owner;
2937 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2940 .rpc_cred = state->owner->so_cred,
2941 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002942 struct rpc_task_setup task_setup_data = {
2943 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002944 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002945 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05002946 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002947 .flags = RPC_TASK_ASYNC,
2948 };
Trond Myklebust95121352005-10-18 14:20:12 -07002949 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04002951 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2952 &task_setup_data.rpc_client, &msg);
2953
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002954 calldata = kzalloc(sizeof(*calldata), gfp_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07002956 goto out;
Chuck Levera9c92d62013-08-09 12:48:18 -04002957 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002958 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002960 calldata->arg.fh = NFS_FH(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 /* Serialization for the sequence id */
Trond Myklebust63f5f792015-01-23 19:19:25 -05002962 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2963 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05002964 if (IS_ERR(calldata->arg.seqid))
Trond Myklebust95121352005-10-18 14:20:12 -07002965 goto out_free_calldata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002966 calldata->arg.fmode = 0;
Trond Myklebusta65318b2009-03-11 14:10:28 -04002967 calldata->arg.bitmask = server->cache_consistency_bitmask;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002968 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04002969 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002970 calldata->res.server = server;
Peng Taofe08c542014-07-03 13:05:01 +08002971 calldata->roc = nfs4_roc(state->inode);
Al Viro643168c2011-06-22 18:20:23 -04002972 nfs_sb_active(calldata->inode->i_sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002973
Trond Myklebust1174dd12010-12-21 10:52:24 -05002974 msg.rpc_argp = &calldata->arg;
2975 msg.rpc_resp = &calldata->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04002976 task_setup_data.callback_data = calldata;
2977 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002978 if (IS_ERR(task))
2979 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002980 status = 0;
2981 if (wait)
2982 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002983 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002984 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07002985out_free_calldata:
2986 kfree(calldata);
2987out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04002988 nfs4_put_open_state(state);
2989 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07002990 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991}
2992
Trond Myklebust2b484292010-09-17 10:56:51 -04002993static struct inode *
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002994nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2995 int open_flags, struct iattr *attr, int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 struct nfs4_state *state;
David Quigleyaa9c2662013-05-22 12:50:44 -04002998 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2999
3000 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001
Trond Myklebust565277f2007-10-15 18:17:53 -04003002 /* Protect against concurrent sillydeletes */
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04003003 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
David Quigleyaa9c2662013-05-22 12:50:44 -04003004
3005 nfs4_label_release_security(label);
3006
Trond Myklebustf46e0bd2010-09-17 10:56:50 -04003007 if (IS_ERR(state))
3008 return ERR_CAST(state);
Trond Myklebust275bb302013-05-29 13:11:28 -04003009 return state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003010}
3011
Trond Myklebust1185a552009-12-03 15:54:02 -05003012static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003013{
3014 if (ctx->state == NULL)
3015 return;
3016 if (is_sync)
Al Viro643168c2011-06-22 18:20:23 -04003017 nfs4_close_sync(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003018 else
Al Viro643168c2011-06-22 18:20:23 -04003019 nfs4_close_state(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003020}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021
Trond Myklebustb944dba2013-11-04 15:20:20 -05003022#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3023#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
J. Bruce Fields999e5682014-06-03 17:33:35 -04003024#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
Trond Myklebustb944dba2013-11-04 15:20:20 -05003025
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3027{
Kinglong Mee8c612822015-08-26 21:12:58 +08003028 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
Benny Halevy43652ad2009-04-01 09:21:54 -04003029 struct nfs4_server_caps_arg args = {
3030 .fhandle = fhandle,
Kinglong Mee8c612822015-08-26 21:12:58 +08003031 .bitmask = bitmask,
Benny Halevy43652ad2009-04-01 09:21:54 -04003032 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003033 struct nfs4_server_caps_res res = {};
3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
Benny Halevy43652ad2009-04-01 09:21:54 -04003036 .rpc_argp = &args,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003037 .rpc_resp = &res,
3038 };
3039 int status;
3040
Kinglong Mee8c612822015-08-26 21:12:58 +08003041 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3042 FATTR4_WORD0_FH_EXPIRE_TYPE |
3043 FATTR4_WORD0_LINK_SUPPORT |
3044 FATTR4_WORD0_SYMLINK_SUPPORT |
3045 FATTR4_WORD0_ACLSUPPORT;
3046 if (minorversion)
3047 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3048
Bryan Schumaker7c513052011-03-24 17:12:24 +00003049 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050 if (status == 0) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05003051 /* Sanity check the server answers */
Kinglong Mee8c612822015-08-26 21:12:58 +08003052 switch (minorversion) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05003053 case 0:
3054 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3055 res.attr_bitmask[2] = 0;
3056 break;
3057 case 1:
3058 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3059 break;
3060 case 2:
3061 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003063 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003064 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3065 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3066 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3067 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
Trond Myklebustb944dba2013-11-04 15:20:20 -05003068 NFS_CAP_CTIME|NFS_CAP_MTIME|
3069 NFS_CAP_SECURITY_LABEL);
Malahal Naineni7dd7d952014-01-23 08:54:55 -06003070 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3071 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072 server->caps |= NFS_CAP_ACLS;
3073 if (res.has_links != 0)
3074 server->caps |= NFS_CAP_HARDLINKS;
3075 if (res.has_symlinks != 0)
3076 server->caps |= NFS_CAP_SYMLINKS;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003077 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3078 server->caps |= NFS_CAP_FILEID;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3080 server->caps |= NFS_CAP_MODE;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3082 server->caps |= NFS_CAP_NLINK;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3084 server->caps |= NFS_CAP_OWNER;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3086 server->caps |= NFS_CAP_OWNER_GROUP;
3087 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3088 server->caps |= NFS_CAP_ATIME;
3089 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3090 server->caps |= NFS_CAP_CTIME;
3091 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3092 server->caps |= NFS_CAP_MTIME;
David Quigleyaa9c2662013-05-22 12:50:44 -04003093#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3094 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3095 server->caps |= NFS_CAP_SECURITY_LABEL;
3096#endif
3097 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3098 sizeof(server->attr_bitmask));
Trond Myklebustb944dba2013-11-04 15:20:20 -05003099 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003100
Trond Myklebusta65318b2009-03-11 14:10:28 -04003101 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3102 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3103 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
Trond Myklebustb944dba2013-11-04 15:20:20 -05003104 server->cache_consistency_bitmask[2] = 0;
Kinglong Mee8c612822015-08-26 21:12:58 +08003105 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3106 sizeof(server->exclcreat_bitmask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107 server->acl_bitmask = res.acl_bitmask;
Chuck Lever264e6352012-03-01 17:02:05 -05003108 server->fh_expire_type = res.fh_expire_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 }
Andy Adamsoncccef3b2009-04-01 09:22:03 -04003110
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111 return status;
3112}
3113
Trond Myklebust55a97592006-06-09 09:34:19 -04003114int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115{
3116 struct nfs4_exception exception = { };
3117 int err;
3118 do {
3119 err = nfs4_handle_exception(server,
3120 _nfs4_server_capabilities(server, fhandle),
3121 &exception);
3122 } while (exception.retry);
3123 return err;
3124}
3125
3126static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3127 struct nfs_fsinfo *info)
3128{
David Quigleyaa9c2662013-05-22 12:50:44 -04003129 u32 bitmask[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 struct nfs4_lookup_root_arg args = {
David Quigleyaa9c2662013-05-22 12:50:44 -04003131 .bitmask = bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132 };
3133 struct nfs4_lookup_res res = {
3134 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04003135 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003136 .fh = fhandle,
3137 };
3138 struct rpc_message msg = {
3139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3140 .rpc_argp = &args,
3141 .rpc_resp = &res,
3142 };
Benny Halevy008f55d2009-04-01 09:22:50 -04003143
David Quigleyaa9c2662013-05-22 12:50:44 -04003144 bitmask[0] = nfs4_fattr_bitmap[0];
3145 bitmask[1] = nfs4_fattr_bitmap[1];
3146 /*
3147 * Process the label in the upcoming getfattr
3148 */
3149 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3150
Trond Myklebust0e574af2005-10-27 22:12:38 -04003151 nfs_fattr_init(info->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003152 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153}
3154
3155static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3156 struct nfs_fsinfo *info)
3157{
3158 struct nfs4_exception exception = { };
3159 int err;
3160 do {
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003161 err = _nfs4_lookup_root(server, fhandle, info);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003162 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003163 switch (err) {
3164 case 0:
3165 case -NFS4ERR_WRONGSEC:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04003166 goto out;
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003167 default:
3168 err = nfs4_handle_exception(server, err, &exception);
3169 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04003171out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172 return err;
3173}
3174
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003175static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3177{
Trond Myklebustc2190662013-08-26 19:23:04 -04003178 struct rpc_auth_create_args auth_args = {
3179 .pseudoflavor = flavor,
3180 };
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003181 struct rpc_auth *auth;
3182 int ret;
3183
Trond Myklebustc2190662013-08-26 19:23:04 -04003184 auth = rpcauth_create(&auth_args, server->client);
Wei Yongjune8d920c2012-09-21 12:27:41 +08003185 if (IS_ERR(auth)) {
Chuck Lever75bc8822013-03-16 15:55:36 -04003186 ret = -EACCES;
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003187 goto out;
3188 }
3189 ret = nfs4_lookup_root(server, fhandle, info);
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003190out:
3191 return ret;
3192}
3193
Chuck Lever9a744ba2013-03-16 15:56:02 -04003194/*
3195 * Retry pseudoroot lookup with various security flavors. We do this when:
3196 *
3197 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3198 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3199 *
3200 * Returns zero on success, or a negative NFS4ERR value, or a
3201 * negative errno value.
3202 */
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003203static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04003204 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003205{
Chuck Lever9a744ba2013-03-16 15:56:02 -04003206 /* Per 3530bis 15.33.5 */
3207 static const rpc_authflavor_t flav_array[] = {
3208 RPC_AUTH_GSS_KRB5P,
3209 RPC_AUTH_GSS_KRB5I,
3210 RPC_AUTH_GSS_KRB5,
Chuck Leverc4eafe12013-03-16 15:56:11 -04003211 RPC_AUTH_UNIX, /* courtesy */
Chuck Lever9a744ba2013-03-16 15:56:02 -04003212 RPC_AUTH_NULL,
3213 };
3214 int status = -EPERM;
3215 size_t i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04003217 if (server->auth_info.flavor_len > 0) {
3218 /* try each flavor specified by user */
3219 for (i = 0; i < server->auth_info.flavor_len; i++) {
3220 status = nfs4_lookup_root_sec(server, fhandle, info,
3221 server->auth_info.flavors[i]);
3222 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3223 continue;
3224 break;
3225 }
3226 } else {
3227 /* no flavors specified by user, try default list */
3228 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3229 status = nfs4_lookup_root_sec(server, fhandle, info,
3230 flav_array[i]);
3231 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3232 continue;
3233 break;
3234 }
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003235 }
Chuck Lever9a744ba2013-03-16 15:56:02 -04003236
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003237 /*
3238 * -EACCESS could mean that the user doesn't have correct permissions
3239 * to access the mount. It could also mean that we tried to mount
3240 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3241 * existing mount programs don't handle -EACCES very well so it should
3242 * be mapped to -EPERM instead.
3243 */
3244 if (status == -EACCES)
3245 status = -EPERM;
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003246 return status;
3247}
3248
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003249static int nfs4_do_find_root_sec(struct nfs_server *server,
3250 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3251{
3252 int mv = server->nfs_client->cl_minorversion;
3253 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3254}
3255
3256/**
3257 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3258 * @server: initialized nfs_server handle
3259 * @fhandle: we fill in the pseudo-fs root file handle
3260 * @info: we fill in an FSINFO struct
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003261 * @auth_probe: probe the auth flavours
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003262 *
3263 * Returns zero on success, or a negative errno.
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003264 */
Bryan Schumaker3028eb22012-05-10 15:07:30 -04003265int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003266 struct nfs_fsinfo *info,
3267 bool auth_probe)
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003268{
Andre Przywarac7757072015-04-23 17:17:40 +01003269 int status = 0;
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003270
Andre Przywarac7757072015-04-23 17:17:40 +01003271 if (!auth_probe)
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003272 status = nfs4_lookup_root(server, fhandle, info);
Andre Przywarac7757072015-04-23 17:17:40 +01003273
3274 if (auth_probe || status == NFS4ERR_WRONGSEC)
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003275 status = nfs4_do_find_root_sec(server, fhandle, info);
3276
Linus Torvalds1da177e2005-04-16 15:20:36 -07003277 if (status == 0)
3278 status = nfs4_server_capabilities(server, fhandle);
3279 if (status == 0)
3280 status = nfs4_do_fsinfo(server, fhandle, info);
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003281
Trond Myklebustc12e87f2006-03-13 21:20:47 -08003282 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283}
3284
Bryan Schumakerbae36242012-05-10 15:07:31 -04003285static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3286 struct nfs_fsinfo *info)
3287{
3288 int error;
3289 struct nfs_fattr *fattr = info->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003290 struct nfs4_label *label = NULL;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003291
3292 error = nfs4_server_capabilities(server, mntfh);
3293 if (error < 0) {
3294 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3295 return error;
3296 }
3297
David Quigley14c43f72013-05-22 12:50:43 -04003298 label = nfs4_label_alloc(server, GFP_KERNEL);
3299 if (IS_ERR(label))
3300 return PTR_ERR(label);
3301
David Quigley1775fd32013-05-22 12:50:42 -04003302 error = nfs4_proc_getattr(server, mntfh, fattr, label);
Bryan Schumakerbae36242012-05-10 15:07:31 -04003303 if (error < 0) {
3304 dprintk("nfs4_get_root: getattr error = %d\n", -error);
David Quigley14c43f72013-05-22 12:50:43 -04003305 goto err_free_label;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003306 }
3307
3308 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3309 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3310 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3311
David Quigley14c43f72013-05-22 12:50:43 -04003312err_free_label:
3313 nfs4_label_free(label);
3314
Bryan Schumakerbae36242012-05-10 15:07:31 -04003315 return error;
3316}
3317
Manoj Naik6b97fd32006-06-09 09:34:29 -04003318/*
3319 * Get locations and (maybe) other attributes of a referral.
3320 * Note that we'll actually follow the referral later when
3321 * we detect fsid mismatch in inode revalidation
3322 */
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003323static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3324 const struct qstr *name, struct nfs_fattr *fattr,
3325 struct nfs_fh *fhandle)
Manoj Naik6b97fd32006-06-09 09:34:29 -04003326{
3327 int status = -ENOMEM;
3328 struct page *page = NULL;
3329 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003330
3331 page = alloc_page(GFP_KERNEL);
3332 if (page == NULL)
3333 goto out;
3334 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3335 if (locations == NULL)
3336 goto out;
3337
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003338 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003339 if (status != 0)
3340 goto out;
Chuck Lever519ae252013-10-17 14:13:19 -04003341
3342 /*
3343 * If the fsid didn't change, this is a migration event, not a
3344 * referral. Cause us to drop into the exception handler, which
3345 * will kick off migration recovery.
3346 */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003347 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Andy Adamson533eb462011-06-13 18:25:56 -04003348 dprintk("%s: server did not return a different fsid for"
3349 " a referral at %s\n", __func__, name->name);
Chuck Lever519ae252013-10-17 14:13:19 -04003350 status = -NFS4ERR_MOVED;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003351 goto out;
3352 }
Andy Adamson533eb462011-06-13 18:25:56 -04003353 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3354 nfs_fixup_referral_attributes(&locations->fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003355
Andy Adamson533eb462011-06-13 18:25:56 -04003356 /* replace the lookup nfs_fattr with the locations nfs_fattr */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003357 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
Manoj Naik6b97fd32006-06-09 09:34:29 -04003358 memset(fhandle, 0, sizeof(struct nfs_fh));
3359out:
3360 if (page)
3361 __free_page(page);
Davidlohr Bueso5d7ca352010-08-11 12:42:15 -04003362 kfree(locations);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003363 return status;
3364}
3365
David Quigley1775fd32013-05-22 12:50:42 -04003366static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3367 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368{
3369 struct nfs4_getattr_arg args = {
3370 .fh = fhandle,
3371 .bitmask = server->attr_bitmask,
3372 };
3373 struct nfs4_getattr_res res = {
3374 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04003375 .label = label,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003376 .server = server,
3377 };
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3380 .rpc_argp = &args,
3381 .rpc_resp = &res,
3382 };
David Quigleyaa9c2662013-05-22 12:50:44 -04003383
3384 args.bitmask = nfs4_bitmask(server, label);
3385
Trond Myklebust0e574af2005-10-27 22:12:38 -04003386 nfs_fattr_init(fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003387 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388}
3389
David Quigley1775fd32013-05-22 12:50:42 -04003390static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3391 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392{
3393 struct nfs4_exception exception = { };
3394 int err;
3395 do {
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003396 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3397 trace_nfs4_getattr(server, fhandle, fattr, err);
3398 err = nfs4_handle_exception(server, err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399 &exception);
3400 } while (exception.retry);
3401 return err;
3402}
3403
3404/*
3405 * The file is not closed if it is opened due to the a request to change
3406 * the size of the file. The open call will not be needed once the
3407 * VFS layer lookup-intents are implemented.
3408 *
3409 * Close is called when the inode is destroyed.
3410 * If we haven't opened the file for O_WRONLY, we
3411 * need to in the size_change case to obtain a stateid.
3412 *
3413 * Got race?
3414 * Because OPEN is always done by name in nfsv4, it is
3415 * possible that we opened a different file by the same
3416 * name. We can recognize this race condition, but we
3417 * can't do anything about it besides returning an error.
3418 *
3419 * This will be fixed with VFS changes (lookup-intent).
3420 */
3421static int
3422nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3423 struct iattr *sattr)
3424{
David Howells2b0143b2015-03-17 22:25:59 +00003425 struct inode *inode = d_inode(dentry);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003426 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05003427 struct nfs4_state *state = NULL;
David Quigley14c43f72013-05-22 12:50:43 -04003428 struct nfs4_label *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003429 int status;
3430
Peng Tao88ac8152014-09-12 11:04:10 +08003431 if (pnfs_ld_layoutret_on_setattr(inode) &&
3432 sattr->ia_valid & ATTR_SIZE &&
3433 sattr->ia_size < i_size_read(inode))
Trond Myklebust24028672013-03-20 13:23:33 -04003434 pnfs_commit_and_return_layout(inode);
Benny Halevy8a1636c2010-07-14 15:43:57 -04003435
Trond Myklebust0e574af2005-10-27 22:12:38 -04003436 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437
Andy Adamson26699402012-05-30 16:12:24 -04003438 /* Deal with open(O_TRUNC) */
3439 if (sattr->ia_valid & ATTR_OPEN)
Nadav Shemercc7936f2013-07-21 17:21:43 +03003440 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
Andy Adamson26699402012-05-30 16:12:24 -04003441
3442 /* Optimization: if the end result is no change, don't RPC */
Nadav Shemercc7936f2013-07-21 17:21:43 +03003443 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
Andy Adamson26699402012-05-30 16:12:24 -04003444 return 0;
3445
Trond Myklebustd5308382005-11-04 15:33:38 -05003446 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003447 if (sattr->ia_valid & ATTR_FILE) {
3448 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003449
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003450 ctx = nfs_file_open_context(sattr->ia_file);
Neil Brown504e5182008-10-16 14:15:16 +11003451 if (ctx) {
3452 cred = ctx->cred;
3453 state = ctx->state;
3454 }
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003455 }
3456
David Quigley14c43f72013-05-22 12:50:43 -04003457 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3458 if (IS_ERR(label))
3459 return PTR_ERR(label);
3460
3461 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
David Quigleyaa9c2662013-05-22 12:50:44 -04003462 if (status == 0) {
Trond Myklebustf0446362015-02-26 16:09:04 -05003463 nfs_setattr_update_inode(inode, sattr, fattr);
David Quigleyaa9c2662013-05-22 12:50:44 -04003464 nfs_setsecurity(inode, fattr, label);
3465 }
David Quigley14c43f72013-05-22 12:50:43 -04003466 nfs4_label_free(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003467 return status;
3468}
3469
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003470static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3471 const struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003472 struct nfs_fattr *fattr, struct nfs4_label *label)
David Howells2b3de442006-08-22 20:06:09 -04003473{
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003474 struct nfs_server *server = NFS_SERVER(dir);
David Howells2b3de442006-08-22 20:06:09 -04003475 int status;
3476 struct nfs4_lookup_arg args = {
3477 .bitmask = server->attr_bitmask,
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003478 .dir_fh = NFS_FH(dir),
David Howells2b3de442006-08-22 20:06:09 -04003479 .name = name,
3480 };
3481 struct nfs4_lookup_res res = {
3482 .server = server,
3483 .fattr = fattr,
David Quigleyaa9c2662013-05-22 12:50:44 -04003484 .label = label,
David Howells2b3de442006-08-22 20:06:09 -04003485 .fh = fhandle,
3486 };
3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3489 .rpc_argp = &args,
3490 .rpc_resp = &res,
3491 };
3492
David Quigleyaa9c2662013-05-22 12:50:44 -04003493 args.bitmask = nfs4_bitmask(server, label);
3494
David Howells2b3de442006-08-22 20:06:09 -04003495 nfs_fattr_init(fattr);
3496
Linus Torvalds1da177e2005-04-16 15:20:36 -07003497 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003498 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003499 dprintk("NFS reply lookup: %d\n", status);
3500 return status;
3501}
3502
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003503static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003504{
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003505 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003506 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003507 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3508 fattr->nlink = 2;
3509}
3510
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003511static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3512 struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003513 struct nfs_fattr *fattr, struct nfs4_label *label)
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003514{
3515 struct nfs4_exception exception = { };
3516 struct rpc_clnt *client = *clnt;
3517 int err;
3518 do {
David Quigley1775fd32013-05-22 12:50:42 -04003519 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003520 trace_nfs4_lookup(dir, name, err);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003521 switch (err) {
3522 case -NFS4ERR_BADNAME:
3523 err = -ENOENT;
3524 goto out;
3525 case -NFS4ERR_MOVED:
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003526 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
Dominique Martinetc86c90c2015-06-04 17:04:17 +02003527 if (err == -NFS4ERR_MOVED)
3528 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003529 goto out;
3530 case -NFS4ERR_WRONGSEC:
3531 err = -EPERM;
3532 if (client != *clnt)
3533 goto out;
Andy Adamson66b06862014-06-12 15:02:32 -04003534 client = nfs4_negotiate_security(client, dir, name);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003535 if (IS_ERR(client))
3536 return PTR_ERR(client);
3537
3538 exception.retry = 1;
3539 break;
3540 default:
3541 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3542 }
3543 } while (exception.retry);
3544
3545out:
3546 if (err == 0)
3547 *clnt = client;
3548 else if (client != *clnt)
3549 rpc_shutdown_client(client);
3550
3551 return err;
3552}
3553
Bryan Schumaker80a16b22012-04-27 13:27:46 -04003554static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
David Quigley1775fd32013-05-22 12:50:42 -04003555 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3556 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003557{
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003558 int status;
3559 struct rpc_clnt *client = NFS_CLIENT(dir);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003560
David Quigley1775fd32013-05-22 12:50:42 -04003561 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003562 if (client != NFS_CLIENT(dir)) {
3563 rpc_shutdown_client(client);
3564 nfs_fixup_secinfo_attributes(fattr);
3565 }
3566 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003567}
3568
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003569struct rpc_clnt *
3570nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3571 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3572{
Trond Myklebustb72888c2013-08-07 20:38:07 -04003573 struct rpc_clnt *client = NFS_CLIENT(dir);
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003574 int status;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003575
David Quigley1775fd32013-05-22 12:50:42 -04003576 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003577 if (status < 0)
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003578 return ERR_PTR(status);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003579 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003580}
3581
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3583{
Trond Myklebust76b32992007-08-10 17:45:11 -04003584 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003585 struct nfs4_accessargs args = {
3586 .fh = NFS_FH(inode),
Trond Myklebusta4980e72012-01-30 15:43:56 -05003587 .bitmask = server->cache_consistency_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588 };
Trond Myklebust76b32992007-08-10 17:45:11 -04003589 struct nfs4_accessres res = {
3590 .server = server,
Trond Myklebust76b32992007-08-10 17:45:11 -04003591 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003592 struct rpc_message msg = {
3593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3594 .rpc_argp = &args,
3595 .rpc_resp = &res,
3596 .rpc_cred = entry->cred,
3597 };
3598 int mode = entry->mask;
David Quigleyaa9c2662013-05-22 12:50:44 -04003599 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003600
3601 /*
3602 * Determine which access bits we want to ask for...
3603 */
3604 if (mode & MAY_READ)
3605 args.access |= NFS4_ACCESS_READ;
3606 if (S_ISDIR(inode->i_mode)) {
3607 if (mode & MAY_WRITE)
3608 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3609 if (mode & MAY_EXEC)
3610 args.access |= NFS4_ACCESS_LOOKUP;
3611 } else {
3612 if (mode & MAY_WRITE)
3613 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3614 if (mode & MAY_EXEC)
3615 args.access |= NFS4_ACCESS_EXECUTE;
3616 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003617
3618 res.fattr = nfs_alloc_fattr();
3619 if (res.fattr == NULL)
3620 return -ENOMEM;
3621
Bryan Schumaker7c513052011-03-24 17:12:24 +00003622 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623 if (!status) {
Weston Andros Adamson6168f622012-09-10 14:00:46 -04003624 nfs_access_set_mask(entry, res.access);
Trond Myklebustc407d412010-04-16 16:22:48 -04003625 nfs_refresh_inode(inode, res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003627 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003628 return status;
3629}
3630
3631static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3632{
3633 struct nfs4_exception exception = { };
3634 int err;
3635 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003636 err = _nfs4_proc_access(inode, entry);
3637 trace_nfs4_access(inode, err);
3638 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 &exception);
3640 } while (exception.retry);
3641 return err;
3642}
3643
3644/*
3645 * TODO: For the time being, we don't try to get any attributes
3646 * along with any of the zero-copy operations READ, READDIR,
3647 * READLINK, WRITE.
3648 *
3649 * In the case of the first three, we want to put the GETATTR
3650 * after the read-type operation -- this is because it is hard
3651 * to predict the length of a GETATTR response in v4, and thus
3652 * align the READ data correctly. This means that the GETATTR
3653 * may end up partially falling into the page cache, and we should
3654 * shift it into the 'tail' of the xdr_buf before processing.
3655 * To do this efficiently, we need to know the total length
3656 * of data received, which doesn't seem to be available outside
3657 * of the RPC layer.
3658 *
3659 * In the case of WRITE, we also want to put the GETATTR after
3660 * the operation -- in this case because we want to make sure
Trond Myklebust140150d2012-06-05 15:20:25 -04003661 * we get the post-operation mtime and size.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003662 *
3663 * Both of these changes to the XDR layer would in fact be quite
3664 * minor, but I decided to leave them for a subsequent patch.
3665 */
3666static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3667 unsigned int pgbase, unsigned int pglen)
3668{
3669 struct nfs4_readlink args = {
3670 .fh = NFS_FH(inode),
3671 .pgbase = pgbase,
3672 .pglen = pglen,
3673 .pages = &page,
3674 };
Benny Halevyf50c7002009-04-01 09:21:55 -04003675 struct nfs4_readlink_res res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676 struct rpc_message msg = {
3677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3678 .rpc_argp = &args,
Benny Halevyf50c7002009-04-01 09:21:55 -04003679 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003680 };
3681
Bryan Schumaker7c513052011-03-24 17:12:24 +00003682 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683}
3684
3685static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3686 unsigned int pgbase, unsigned int pglen)
3687{
3688 struct nfs4_exception exception = { };
3689 int err;
3690 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003691 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3692 trace_nfs4_readlink(inode, err);
3693 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003694 &exception);
3695 } while (exception.retry);
3696 return err;
3697}
3698
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699/*
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003700 * This is just for mknod. open(O_CREAT) will always do ->open_context().
Linus Torvalds1da177e2005-04-16 15:20:36 -07003701 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702static int
3703nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003704 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003705{
David Quigleyaa9c2662013-05-22 12:50:44 -04003706 struct nfs4_label l, *ilabel = NULL;
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003707 struct nfs_open_context *ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003708 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709 int status = 0;
3710
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003711 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3712 if (IS_ERR(ctx))
3713 return PTR_ERR(ctx);
3714
David Quigleyaa9c2662013-05-22 12:50:44 -04003715 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3716
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003717 sattr->ia_mode &= ~current_umask();
Kinglong Meec5c3fb52015-08-26 21:11:39 +08003718 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719 if (IS_ERR(state)) {
3720 status = PTR_ERR(state);
Trond Myklebustc0204fd2010-09-17 10:56:51 -04003721 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723out:
David Quigleyaa9c2662013-05-22 12:50:44 -04003724 nfs4_label_release_security(ilabel);
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003725 put_nfs_open_context(ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003726 return status;
3727}
3728
3729static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3730{
Trond Myklebust16e42952005-10-27 22:12:44 -04003731 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003732 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003733 .fh = NFS_FH(dir),
Linus Torvalds26fe5752012-05-10 13:14:12 -07003734 .name = *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003736 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04003737 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04003738 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003739 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3741 .rpc_argp = &args,
3742 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003743 };
Trond Myklebust778d2812012-04-27 13:48:19 -04003744 int status;
Trond Myklebustd3468902010-04-16 16:22:50 -04003745
Bryan Schumaker7c513052011-03-24 17:12:24 +00003746 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
Trond Myklebust778d2812012-04-27 13:48:19 -04003747 if (status == 0)
Trond Myklebust16e42952005-10-27 22:12:44 -04003748 update_changeattr(dir, &res.cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003749 return status;
3750}
3751
3752static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3753{
3754 struct nfs4_exception exception = { };
3755 int err;
3756 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003757 err = _nfs4_proc_remove(dir, name);
3758 trace_nfs4_remove(dir, name, err);
3759 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003760 &exception);
3761 } while (exception.retry);
3762 return err;
3763}
3764
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003765static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003767 struct nfs_server *server = NFS_SERVER(dir);
3768 struct nfs_removeargs *args = msg->rpc_argp;
3769 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003771 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003772 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Chuck Levera9c92d62013-08-09 12:48:18 -04003773 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04003774
3775 nfs_fattr_init(res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776}
3777
Bryan Schumaker34e137c2012-03-19 14:54:41 -04003778static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3779{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003780 nfs4_setup_sequence(NFS_SERVER(data->dir),
3781 &data->args.seq_args,
3782 &data->res.seq_res,
3783 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003784}
3785
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003786static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003787{
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003788 struct nfs_unlinkdata *data = task->tk_calldata;
3789 struct nfs_removeres *res = &data->res;
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003790
Trond Myklebust14516c32010-07-31 14:29:06 -04003791 if (!nfs4_sequence_done(task, &res->seq_res))
3792 return 0;
NeilBrown8478eaa2014-09-18 16:09:27 +10003793 if (nfs4_async_handle_error(task, res->server, NULL,
3794 &data->timeout) == -EAGAIN)
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003795 return 0;
3796 update_changeattr(dir, &res->cinfo);
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003797 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003798}
3799
Jeff Laytond3d41522010-09-17 17:31:57 -04003800static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3801{
3802 struct nfs_server *server = NFS_SERVER(dir);
3803 struct nfs_renameargs *arg = msg->rpc_argp;
3804 struct nfs_renameres *res = msg->rpc_resp;
3805
3806 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
Jeff Laytond3d41522010-09-17 17:31:57 -04003807 res->server = server;
Chuck Levera9c92d62013-08-09 12:48:18 -04003808 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
Jeff Laytond3d41522010-09-17 17:31:57 -04003809}
3810
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04003811static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3812{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003813 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3814 &data->args.seq_args,
3815 &data->res.seq_res,
3816 task);
Jeff Laytond3d41522010-09-17 17:31:57 -04003817}
3818
3819static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3820 struct inode *new_dir)
3821{
Trond Myklebustfbc6f7c2013-08-12 17:08:26 -04003822 struct nfs_renamedata *data = task->tk_calldata;
3823 struct nfs_renameres *res = &data->res;
Jeff Laytond3d41522010-09-17 17:31:57 -04003824
3825 if (!nfs4_sequence_done(task, &res->seq_res))
3826 return 0;
NeilBrown8478eaa2014-09-18 16:09:27 +10003827 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
Jeff Laytond3d41522010-09-17 17:31:57 -04003828 return 0;
3829
3830 update_changeattr(old_dir, &res->old_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003831 update_changeattr(new_dir, &res->new_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003832 return 1;
3833}
3834
Linus Torvalds1da177e2005-04-16 15:20:36 -07003835static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3836{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003837 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003838 struct nfs4_link_arg arg = {
3839 .fh = NFS_FH(inode),
3840 .dir_fh = NFS_FH(dir),
3841 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003842 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003843 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003844 struct nfs4_link_res res = {
3845 .server = server,
David Quigley1775fd32013-05-22 12:50:42 -04003846 .label = NULL,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003847 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848 struct rpc_message msg = {
3849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3850 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003851 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003852 };
Trond Myklebust136f2622010-04-16 16:22:49 -04003853 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854
Trond Myklebust136f2622010-04-16 16:22:49 -04003855 res.fattr = nfs_alloc_fattr();
Trond Myklebust778d2812012-04-27 13:48:19 -04003856 if (res.fattr == NULL)
Trond Myklebust136f2622010-04-16 16:22:49 -04003857 goto out;
3858
David Quigley14c43f72013-05-22 12:50:43 -04003859 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3860 if (IS_ERR(res.label)) {
3861 status = PTR_ERR(res.label);
3862 goto out;
3863 }
David Quigleyaa9c2662013-05-22 12:50:44 -04003864 arg.bitmask = nfs4_bitmask(server, res.label);
David Quigley14c43f72013-05-22 12:50:43 -04003865
Bryan Schumaker7c513052011-03-24 17:12:24 +00003866 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003867 if (!status) {
3868 update_changeattr(dir, &res.cinfo);
David Quigleyaa9c2662013-05-22 12:50:44 -04003869 status = nfs_post_op_update_inode(inode, res.fattr);
3870 if (!status)
3871 nfs_setsecurity(inode, res.fattr, res.label);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003872 }
David Quigley14c43f72013-05-22 12:50:43 -04003873
3874
3875 nfs4_label_free(res.label);
3876
Trond Myklebust136f2622010-04-16 16:22:49 -04003877out:
Trond Myklebust136f2622010-04-16 16:22:49 -04003878 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879 return status;
3880}
3881
3882static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3883{
3884 struct nfs4_exception exception = { };
3885 int err;
3886 do {
3887 err = nfs4_handle_exception(NFS_SERVER(inode),
3888 _nfs4_proc_link(inode, dir, name),
3889 &exception);
3890 } while (exception.retry);
3891 return err;
3892}
3893
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003894struct nfs4_createdata {
3895 struct rpc_message msg;
3896 struct nfs4_create_arg arg;
3897 struct nfs4_create_res res;
3898 struct nfs_fh fh;
3899 struct nfs_fattr fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003900 struct nfs4_label *label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003901};
3902
3903static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3904 struct qstr *name, struct iattr *sattr, u32 ftype)
3905{
3906 struct nfs4_createdata *data;
3907
3908 data = kzalloc(sizeof(*data), GFP_KERNEL);
3909 if (data != NULL) {
3910 struct nfs_server *server = NFS_SERVER(dir);
3911
David Quigley14c43f72013-05-22 12:50:43 -04003912 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3913 if (IS_ERR(data->label))
3914 goto out_free;
3915
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003916 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3917 data->msg.rpc_argp = &data->arg;
3918 data->msg.rpc_resp = &data->res;
3919 data->arg.dir_fh = NFS_FH(dir);
3920 data->arg.server = server;
3921 data->arg.name = name;
3922 data->arg.attrs = sattr;
3923 data->arg.ftype = ftype;
David Quigleyaa9c2662013-05-22 12:50:44 -04003924 data->arg.bitmask = nfs4_bitmask(server, data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003925 data->res.server = server;
3926 data->res.fh = &data->fh;
3927 data->res.fattr = &data->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003928 data->res.label = data->label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003929 nfs_fattr_init(data->res.fattr);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003930 }
3931 return data;
David Quigley14c43f72013-05-22 12:50:43 -04003932out_free:
3933 kfree(data);
3934 return NULL;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003935}
3936
3937static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3938{
Bryan Schumaker7c513052011-03-24 17:12:24 +00003939 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
Bryan Schumakere73b83f2011-03-24 17:12:23 +00003940 &data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003941 if (status == 0) {
3942 update_changeattr(dir, &data->res.dir_cinfo);
David Quigley1775fd32013-05-22 12:50:42 -04003943 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003944 }
3945 return status;
3946}
3947
3948static void nfs4_free_createdata(struct nfs4_createdata *data)
3949{
David Quigley14c43f72013-05-22 12:50:43 -04003950 nfs4_label_free(data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003951 kfree(data);
3952}
3953
Chuck Lever4f390c12006-08-22 20:06:22 -04003954static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003955 struct page *page, unsigned int len, struct iattr *sattr,
3956 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003957{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003958 struct nfs4_createdata *data;
3959 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003960
Chuck Lever94a6d752006-08-22 20:06:23 -04003961 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003962 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04003963
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003964 status = -ENOMEM;
3965 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3966 if (data == NULL)
3967 goto out;
3968
3969 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3970 data->arg.u.symlink.pages = &page;
3971 data->arg.u.symlink.len = len;
David Quigley1775fd32013-05-22 12:50:42 -04003972 data->arg.label = label;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003974 status = nfs4_do_create(dir, dentry, data);
3975
3976 nfs4_free_createdata(data);
3977out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003978 return status;
3979}
3980
Chuck Lever4f390c12006-08-22 20:06:22 -04003981static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04003982 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003983{
3984 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003985 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986 int err;
David Quigleyaa9c2662013-05-22 12:50:44 -04003987
3988 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3989
Linus Torvalds1da177e2005-04-16 15:20:36 -07003990 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003991 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3992 trace_nfs4_symlink(dir, &dentry->d_name, err);
3993 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003994 &exception);
3995 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003996
3997 nfs4_label_release_security(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003998 return err;
3999}
4000
4001static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04004002 struct iattr *sattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004003{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004004 struct nfs4_createdata *data;
4005 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004006
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004007 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4008 if (data == NULL)
4009 goto out;
4010
David Quigley1775fd32013-05-22 12:50:42 -04004011 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004012 status = nfs4_do_create(dir, dentry, data);
4013
4014 nfs4_free_createdata(data);
4015out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004016 return status;
4017}
4018
4019static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4020 struct iattr *sattr)
4021{
4022 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04004023 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004025
David Quigleyaa9c2662013-05-22 12:50:44 -04004026 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4027
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004028 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004029 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04004030 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4031 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4032 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004033 &exception);
4034 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04004035 nfs4_label_release_security(label);
4036
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037 return err;
4038}
4039
4040static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004041 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042{
David Howells2b0143b2015-03-17 22:25:59 +00004043 struct inode *dir = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004044 struct nfs4_readdir_arg args = {
4045 .fh = NFS_FH(dir),
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004046 .pages = pages,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004047 .pgbase = 0,
4048 .count = count,
David Howells2b0143b2015-03-17 22:25:59 +00004049 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
Bryan Schumaker82f2e542010-10-21 16:33:18 -04004050 .plus = plus,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004051 };
4052 struct nfs4_readdir_res res;
4053 struct rpc_message msg = {
4054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4055 .rpc_argp = &args,
4056 .rpc_resp = &res,
4057 .rpc_cred = cred,
4058 };
4059 int status;
4060
Al Viro6de14722013-09-16 10:53:17 -04004061 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4062 dentry,
Trond Myklebusteadf4592005-06-22 17:16:39 +00004063 (unsigned long long)cookie);
Trond Myklebustc3f52af2012-09-03 14:56:02 -04004064 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004065 res.pgbase = args.pgbase;
Bryan Schumaker7c513052011-03-24 17:12:24 +00004066 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
Trond Myklebustac396122010-11-15 20:26:22 -05004067 if (status >= 0) {
Trond Myklebustc3f52af2012-09-03 14:56:02 -04004068 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustac396122010-11-15 20:26:22 -05004069 status += args.pgbase;
4070 }
Trond Myklebustc4812992007-09-28 17:11:45 -04004071
4072 nfs_invalidate_atime(dir);
4073
Harvey Harrison3110ff82008-05-02 13:42:44 -07004074 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075 return status;
4076}
4077
4078static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004079 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080{
4081 struct nfs4_exception exception = { };
4082 int err;
4083 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004084 err = _nfs4_proc_readdir(dentry, cred, cookie,
4085 pages, count, plus);
David Howells2b0143b2015-03-17 22:25:59 +00004086 trace_nfs4_readdir(d_inode(dentry), err);
4087 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088 &exception);
4089 } while (exception.retry);
4090 return err;
4091}
4092
4093static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
David Quigleyaa9c2662013-05-22 12:50:44 -04004094 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004096 struct nfs4_createdata *data;
4097 int mode = sattr->ia_mode;
4098 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004099
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004100 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4101 if (data == NULL)
4102 goto out;
4103
Linus Torvalds1da177e2005-04-16 15:20:36 -07004104 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004105 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004106 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004107 data->arg.ftype = NF4BLK;
4108 data->arg.u.device.specdata1 = MAJOR(rdev);
4109 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110 }
4111 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004112 data->arg.ftype = NF4CHR;
4113 data->arg.u.device.specdata1 = MAJOR(rdev);
4114 data->arg.u.device.specdata2 = MINOR(rdev);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04004115 } else if (!S_ISSOCK(mode)) {
4116 status = -EINVAL;
4117 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004118 }
David Quigley1775fd32013-05-22 12:50:42 -04004119
David Quigleyaa9c2662013-05-22 12:50:44 -04004120 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004121 status = nfs4_do_create(dir, dentry, data);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04004122out_free:
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004123 nfs4_free_createdata(data);
4124out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004125 return status;
4126}
4127
4128static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4129 struct iattr *sattr, dev_t rdev)
4130{
4131 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04004132 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004133 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004134
David Quigleyaa9c2662013-05-22 12:50:44 -04004135 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4136
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004137 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004138 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04004139 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4140 trace_nfs4_mknod(dir, &dentry->d_name, err);
4141 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004142 &exception);
4143 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04004144
4145 nfs4_label_release_security(label);
4146
Linus Torvalds1da177e2005-04-16 15:20:36 -07004147 return err;
4148}
4149
4150static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4151 struct nfs_fsstat *fsstat)
4152{
4153 struct nfs4_statfs_arg args = {
4154 .fh = fhandle,
4155 .bitmask = server->attr_bitmask,
4156 };
Benny Halevy24ad1482009-04-01 09:21:56 -04004157 struct nfs4_statfs_res res = {
4158 .fsstat = fsstat,
4159 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004160 struct rpc_message msg = {
4161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4162 .rpc_argp = &args,
Benny Halevy24ad1482009-04-01 09:21:56 -04004163 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004164 };
4165
Trond Myklebust0e574af2005-10-27 22:12:38 -04004166 nfs_fattr_init(fsstat->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004167 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004168}
4169
4170static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4171{
4172 struct nfs4_exception exception = { };
4173 int err;
4174 do {
4175 err = nfs4_handle_exception(server,
4176 _nfs4_proc_statfs(server, fhandle, fsstat),
4177 &exception);
4178 } while (exception.retry);
4179 return err;
4180}
4181
4182static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4183 struct nfs_fsinfo *fsinfo)
4184{
4185 struct nfs4_fsinfo_arg args = {
4186 .fh = fhandle,
4187 .bitmask = server->attr_bitmask,
4188 };
Benny Halevy3dda5e42009-04-01 09:21:57 -04004189 struct nfs4_fsinfo_res res = {
4190 .fsinfo = fsinfo,
4191 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004192 struct rpc_message msg = {
4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4194 .rpc_argp = &args,
Benny Halevy3dda5e42009-04-01 09:21:57 -04004195 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004196 };
4197
Bryan Schumaker7c513052011-03-24 17:12:24 +00004198 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004199}
4200
4201static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4202{
4203 struct nfs4_exception exception = { };
Chuck Lever83ca7f52013-03-16 15:55:53 -04004204 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205 int err;
4206
4207 do {
Chuck Lever83ca7f52013-03-16 15:55:53 -04004208 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04004209 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
Chuck Lever83ca7f52013-03-16 15:55:53 -04004210 if (err == 0) {
4211 struct nfs_client *clp = server->nfs_client;
4212
4213 spin_lock(&clp->cl_lock);
4214 clp->cl_lease_time = fsinfo->lease_time * HZ;
4215 clp->cl_last_renewal = now;
4216 spin_unlock(&clp->cl_lock);
4217 break;
4218 }
4219 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004220 } while (exception.retry);
4221 return err;
4222}
4223
4224static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4225{
Bryan Schumakere38eb652012-06-20 15:53:40 -04004226 int error;
4227
Trond Myklebust0e574af2005-10-27 22:12:38 -04004228 nfs_fattr_init(fsinfo->fattr);
Bryan Schumakere38eb652012-06-20 15:53:40 -04004229 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
Peng Taodc182542012-08-24 00:27:49 +08004230 if (error == 0) {
4231 /* block layout checks this! */
4232 server->pnfs_blksize = fsinfo->blksize;
Bryan Schumakere38eb652012-06-20 15:53:40 -04004233 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
Peng Taodc182542012-08-24 00:27:49 +08004234 }
Bryan Schumakere38eb652012-06-20 15:53:40 -04004235
4236 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004237}
4238
4239static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4240 struct nfs_pathconf *pathconf)
4241{
4242 struct nfs4_pathconf_arg args = {
4243 .fh = fhandle,
4244 .bitmask = server->attr_bitmask,
4245 };
Benny Halevyd45b2982009-04-01 09:21:58 -04004246 struct nfs4_pathconf_res res = {
4247 .pathconf = pathconf,
4248 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004249 struct rpc_message msg = {
4250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4251 .rpc_argp = &args,
Benny Halevyd45b2982009-04-01 09:21:58 -04004252 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004253 };
4254
4255 /* None of the pathconf attributes are mandatory to implement */
4256 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4257 memset(pathconf, 0, sizeof(*pathconf));
4258 return 0;
4259 }
4260
Trond Myklebust0e574af2005-10-27 22:12:38 -04004261 nfs_fattr_init(pathconf->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004262 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263}
4264
4265static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4266 struct nfs_pathconf *pathconf)
4267{
4268 struct nfs4_exception exception = { };
4269 int err;
4270
4271 do {
4272 err = nfs4_handle_exception(server,
4273 _nfs4_proc_pathconf(server, fhandle, pathconf),
4274 &exception);
4275 } while (exception.retry);
4276 return err;
4277}
4278
Trond Myklebust5521abf2013-03-16 20:54:34 -04004279int nfs4_set_rw_stateid(nfs4_stateid *stateid,
Trond Myklebust9b206142013-03-17 15:52:00 -04004280 const struct nfs_open_context *ctx,
4281 const struct nfs_lock_context *l_ctx,
4282 fmode_t fmode)
4283{
4284 const struct nfs_lockowner *lockowner = NULL;
4285
4286 if (l_ctx != NULL)
4287 lockowner = &l_ctx->lockowner;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004288 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
Trond Myklebust9b206142013-03-17 15:52:00 -04004289}
4290EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4291
Trond Myklebust5521abf2013-03-16 20:54:34 -04004292static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4293 const struct nfs_open_context *ctx,
4294 const struct nfs_lock_context *l_ctx,
4295 fmode_t fmode)
4296{
4297 nfs4_stateid current_stateid;
4298
Trond Myklebuste1253be2014-03-05 08:44:23 -05004299 /* If the current stateid represents a lost lock, then exit */
4300 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4301 return true;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004302 return nfs4_stateid_match(stateid, &current_stateid);
4303}
4304
4305static bool nfs4_error_stateid_expired(int err)
4306{
4307 switch (err) {
4308 case -NFS4ERR_DELEG_REVOKED:
4309 case -NFS4ERR_ADMIN_REVOKED:
4310 case -NFS4ERR_BAD_STATEID:
4311 case -NFS4ERR_STALE_STATEID:
4312 case -NFS4ERR_OLD_STATEID:
4313 case -NFS4ERR_OPENMODE:
4314 case -NFS4ERR_EXPIRED:
4315 return true;
4316 }
4317 return false;
4318}
4319
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004320void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
Benny Halevyd20581a2011-05-22 19:52:03 +03004321{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004322 nfs_invalidate_atime(hdr->inode);
Benny Halevyd20581a2011-05-22 19:52:03 +03004323}
4324
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004325static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004326{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004327 struct nfs_server *server = NFS_SERVER(hdr->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004329 trace_nfs4_read(hdr, task->tk_status);
4330 if (nfs4_async_handle_error(task, server,
NeilBrown8478eaa2014-09-18 16:09:27 +10004331 hdr->args.context->state,
4332 NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004333 rpc_restart_call_prepare(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05004334 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004335 }
Trond Myklebust8850df92007-09-28 17:20:07 -04004336
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004337 __nfs4_read_done_cb(hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338 if (task->tk_status > 0)
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004339 renew_lease(server, hdr->timestamp);
Trond Myklebustec06c092006-03-20 13:44:27 -05004340 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004341}
4342
Trond Myklebust5521abf2013-03-16 20:54:34 -04004343static bool nfs4_read_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004344 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004345{
4346
4347 if (!nfs4_error_stateid_expired(task->tk_status) ||
4348 nfs4_stateid_is_current(&args->stateid,
4349 args->context,
4350 args->lock_context,
4351 FMODE_READ))
4352 return false;
4353 rpc_restart_call_prepare(task);
4354 return true;
4355}
4356
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004357static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004358{
4359
4360 dprintk("--> %s\n", __func__);
4361
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004362 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004363 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004364 if (nfs4_read_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004365 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004366 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4367 nfs4_read_done_cb(task, hdr);
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004368}
4369
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004370static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4371 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004372{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004373 hdr->timestamp = jiffies;
4374 hdr->pgio_done_cb = nfs4_read_done_cb;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004375 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004376 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004377}
4378
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004379static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4380 struct nfs_pgio_header *hdr)
Bryan Schumakerea7c3302012-03-19 14:54:40 -04004381{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004382 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4383 &hdr->args.seq_args,
4384 &hdr->res.seq_res,
Trond Myklebust9b206142013-03-17 15:52:00 -04004385 task))
NeilBrownef1820f2013-09-04 17:04:49 +10004386 return 0;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004387 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4388 hdr->args.lock_context,
4389 hdr->rw_ops->rw_mode) == -EIO)
NeilBrownef1820f2013-09-04 17:04:49 +10004390 return -EIO;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004391 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
NeilBrownef1820f2013-09-04 17:04:49 +10004392 return -EIO;
4393 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004394}
4395
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004396static int nfs4_write_done_cb(struct rpc_task *task,
4397 struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004398{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004399 struct inode *inode = hdr->inode;
NeilBrown8478eaa2014-09-18 16:09:27 +10004400
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004401 trace_nfs4_write(hdr, task->tk_status);
4402 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
NeilBrown8478eaa2014-09-18 16:09:27 +10004403 hdr->args.context->state,
4404 NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004405 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004406 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004408 if (task->tk_status >= 0) {
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004409 renew_lease(NFS_SERVER(inode), hdr->timestamp);
Trond Myklebusta08a8cd2015-02-26 17:36:09 -05004410 nfs_writeback_update_inode(hdr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004411 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004412 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413}
4414
Trond Myklebust5521abf2013-03-16 20:54:34 -04004415static bool nfs4_write_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004416 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004417{
4418
4419 if (!nfs4_error_stateid_expired(task->tk_status) ||
4420 nfs4_stateid_is_current(&args->stateid,
4421 args->context,
4422 args->lock_context,
4423 FMODE_WRITE))
4424 return false;
4425 rpc_restart_call_prepare(task);
4426 return true;
4427}
4428
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004429static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Fred Isamanb029bc92011-03-03 15:13:42 +00004430{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004431 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Fred Isamanb029bc92011-03-03 15:13:42 +00004432 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004433 if (nfs4_write_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004434 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004435 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4436 nfs4_write_done_cb(task, hdr);
Fred Isamanb029bc92011-03-03 15:13:42 +00004437}
4438
Trond Myklebust5a37f852012-04-28 14:55:16 -04004439static
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004440bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
Fred Isamana69aef12011-03-03 15:13:47 +00004441{
Trond Myklebust5a37f852012-04-28 14:55:16 -04004442 /* Don't request attributes for pNFS or O_DIRECT writes */
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004443 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
Trond Myklebust5a37f852012-04-28 14:55:16 -04004444 return false;
4445 /* Otherwise, request attributes if and only if we don't hold
4446 * a delegation
4447 */
Bryan Schumaker011e2a72012-06-20 15:53:43 -04004448 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
Fred Isamana69aef12011-03-03 15:13:47 +00004449}
Fred Isamana69aef12011-03-03 15:13:47 +00004450
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004451static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4452 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004453{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004454 struct nfs_server *server = NFS_SERVER(hdr->inode);
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004455
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004456 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4457 hdr->args.bitmask = NULL;
4458 hdr->res.fattr = NULL;
Fred Isaman7ffd1062011-03-03 15:13:46 +00004459 } else
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004460 hdr->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust5a37f852012-04-28 14:55:16 -04004461
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004462 if (!hdr->pgio_done_cb)
4463 hdr->pgio_done_cb = nfs4_write_done_cb;
4464 hdr->res.server = server;
4465 hdr->timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004466
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004467 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004468 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469}
4470
Fred Isaman0b7c0152012-04-20 14:47:39 -04004471static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4472{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04004473 nfs4_setup_sequence(NFS_SERVER(data->inode),
4474 &data->args.seq_args,
4475 &data->res.seq_res,
4476 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004477}
4478
Fred Isaman0b7c0152012-04-20 14:47:39 -04004479static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004480{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004481 struct inode *inode = data->inode;
Trond Myklebust14516c32010-07-31 14:29:06 -04004482
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004483 trace_nfs4_commit(data, task->tk_status);
NeilBrown8478eaa2014-09-18 16:09:27 +10004484 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4485 NULL, NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004486 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004487 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004488 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004489 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004490}
4491
Fred Isaman0b7c0152012-04-20 14:47:39 -04004492static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
Fred Isaman5f452432011-03-23 13:27:46 +00004493{
4494 if (!nfs4_sequence_done(task, &data->res.seq_res))
4495 return -EAGAIN;
Fred Isaman0b7c0152012-04-20 14:47:39 -04004496 return data->commit_done_cb(task, data);
Fred Isaman5f452432011-03-23 13:27:46 +00004497}
4498
Fred Isaman0b7c0152012-04-20 14:47:39 -04004499static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004500{
Trond Myklebust788e7a82006-03-20 13:44:27 -05004501 struct nfs_server *server = NFS_SERVER(data->inode);
Fred Isaman988b6dc2011-03-23 13:27:52 +00004502
Fred Isaman0b7c0152012-04-20 14:47:39 -04004503 if (data->commit_done_cb == NULL)
4504 data->commit_done_cb = nfs4_commit_done_cb;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004505 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004506 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Chuck Levera9c92d62013-08-09 12:48:18 -04004507 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508}
4509
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004510struct nfs4_renewdata {
4511 struct nfs_client *client;
4512 unsigned long timestamp;
4513};
4514
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515/*
4516 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4517 * standalone procedure for queueing an asynchronous RENEW.
4518 */
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004519static void nfs4_renew_release(void *calldata)
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004520{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004521 struct nfs4_renewdata *data = calldata;
4522 struct nfs_client *clp = data->client;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004523
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004524 if (atomic_read(&clp->cl_count) > 1)
4525 nfs4_schedule_state_renewal(clp);
4526 nfs_put_client(clp);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004527 kfree(data);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004528}
4529
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004530static void nfs4_renew_done(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004531{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004532 struct nfs4_renewdata *data = calldata;
4533 struct nfs_client *clp = data->client;
4534 unsigned long timestamp = data->timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004536 trace_nfs4_renew_async(clp, task->tk_status);
Chuck Leverf8aba1e2013-10-17 14:13:53 -04004537 switch (task->tk_status) {
4538 case 0:
4539 break;
4540 case -NFS4ERR_LEASE_MOVED:
4541 nfs4_schedule_lease_moved_recovery(clp);
4542 break;
4543 default:
Trond Myklebust95baa252009-05-26 14:51:00 -04004544 /* Unless we're shutting down, schedule state recovery! */
Trond Myklebust042b60b2011-08-24 15:07:37 -04004545 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4546 return;
4547 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004548 nfs4_schedule_lease_recovery(clp);
Trond Myklebust042b60b2011-08-24 15:07:37 -04004549 return;
4550 }
4551 nfs4_schedule_path_down_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004552 }
Trond Myklebust452e9352010-07-31 14:29:06 -04004553 do_renew_lease(clp, timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004554}
4555
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004556static const struct rpc_call_ops nfs4_renew_ops = {
4557 .rpc_call_done = nfs4_renew_done,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004558 .rpc_release = nfs4_renew_release,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004559};
4560
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004561static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004562{
4563 struct rpc_message msg = {
4564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4565 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004566 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567 };
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004568 struct nfs4_renewdata *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004569
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004570 if (renew_flags == 0)
4571 return 0;
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004572 if (!atomic_inc_not_zero(&clp->cl_count))
4573 return -EIO;
Trond Myklebustb569ad32011-08-24 15:07:35 -04004574 data = kmalloc(sizeof(*data), GFP_NOFS);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004575 if (data == NULL)
4576 return -ENOMEM;
4577 data->client = clp;
4578 data->timestamp = jiffies;
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004579 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004580 &nfs4_renew_ops, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004581}
4582
Trond Myklebust8534d4e2011-08-24 15:07:37 -04004583static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004584{
4585 struct rpc_message msg = {
4586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4587 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004588 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004589 };
4590 unsigned long now = jiffies;
4591 int status;
4592
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004593 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004594 if (status < 0)
4595 return status;
Trond Myklebust452e9352010-07-31 14:29:06 -04004596 do_renew_lease(clp, now);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597 return 0;
4598}
4599
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004600static inline int nfs4_server_supports_acls(struct nfs_server *server)
4601{
Malahal Naineni7dd7d952014-01-23 08:54:55 -06004602 return server->caps & NFS_CAP_ACLS;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004603}
4604
Trond Myklebust21f498c2012-08-24 10:59:25 -04004605/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4606 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004607 * the stack.
4608 */
Trond Myklebust21f498c2012-08-24 10:59:25 -04004609#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004610
Neil Hormane9e3d722011-03-04 19:26:03 -05004611static int buf_to_pages_noslab(const void *buf, size_t buflen,
Andreas Gruenbacher8fbcf232015-11-03 18:25:34 +01004612 struct page **pages)
Neil Hormane9e3d722011-03-04 19:26:03 -05004613{
4614 struct page *newpage, **spages;
4615 int rc = 0;
4616 size_t len;
4617 spages = pages;
4618
4619 do {
Trond Myklebust21f498c2012-08-24 10:59:25 -04004620 len = min_t(size_t, PAGE_SIZE, buflen);
Neil Hormane9e3d722011-03-04 19:26:03 -05004621 newpage = alloc_page(GFP_KERNEL);
4622
4623 if (newpage == NULL)
4624 goto unwind;
4625 memcpy(page_address(newpage), buf, len);
4626 buf += len;
4627 buflen -= len;
4628 *pages++ = newpage;
4629 rc++;
4630 } while (buflen != 0);
4631
4632 return rc;
4633
4634unwind:
4635 for(; rc > 0; rc--)
4636 __free_page(spages[rc-1]);
4637 return -ENOMEM;
4638}
4639
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004640struct nfs4_cached_acl {
4641 int cached;
4642 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00004643 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004644};
4645
4646static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004647{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004648 struct nfs_inode *nfsi = NFS_I(inode);
4649
4650 spin_lock(&inode->i_lock);
4651 kfree(nfsi->nfs4_acl);
4652 nfsi->nfs4_acl = acl;
4653 spin_unlock(&inode->i_lock);
4654}
4655
4656static void nfs4_zap_acl_attr(struct inode *inode)
4657{
4658 nfs4_set_cached_acl(inode, NULL);
4659}
4660
4661static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4662{
4663 struct nfs_inode *nfsi = NFS_I(inode);
4664 struct nfs4_cached_acl *acl;
4665 int ret = -ENOENT;
4666
4667 spin_lock(&inode->i_lock);
4668 acl = nfsi->nfs4_acl;
4669 if (acl == NULL)
4670 goto out;
4671 if (buf == NULL) /* user is just asking for length */
4672 goto out_len;
4673 if (acl->cached == 0)
4674 goto out;
4675 ret = -ERANGE; /* see getxattr(2) man page */
4676 if (acl->len > buflen)
4677 goto out;
4678 memcpy(buf, acl->data, acl->len);
4679out_len:
4680 ret = acl->len;
4681out:
4682 spin_unlock(&inode->i_lock);
4683 return ret;
4684}
4685
Sachin Prabhu5794d212012-04-17 14:36:40 +01004686static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004687{
4688 struct nfs4_cached_acl *acl;
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004689 size_t buflen = sizeof(*acl) + acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004690
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004691 if (buflen <= PAGE_SIZE) {
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004692 acl = kmalloc(buflen, GFP_KERNEL);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004693 if (acl == NULL)
4694 goto out;
4695 acl->cached = 1;
Sachin Prabhu5794d212012-04-17 14:36:40 +01004696 _copy_from_pages(acl->data, pages, pgbase, acl_len);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004697 } else {
4698 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4699 if (acl == NULL)
4700 goto out;
4701 acl->cached = 0;
4702 }
4703 acl->len = acl_len;
4704out:
4705 nfs4_set_cached_acl(inode, acl);
4706}
4707
Andy Adamsonbf118a32011-12-07 11:55:27 -05004708/*
4709 * The getxattr API returns the required buffer length when called with a
4710 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4711 * the required buf. On a NULL buf, we send a page of data to the server
4712 * guessing that the ACL request can be serviced by a page. If so, we cache
4713 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4714 * the cache. If not so, we throw away the page, and cache the required
4715 * length. The next getxattr call will then produce another round trip to
4716 * the server, this time with the input buf of the required size.
4717 */
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004718static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004719{
Andy Adamsonbf118a32011-12-07 11:55:27 -05004720 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004721 struct nfs_getaclargs args = {
4722 .fh = NFS_FH(inode),
4723 .acl_pages = pages,
4724 .acl_len = buflen,
4725 };
Benny Halevy663c79b2009-04-01 09:21:59 -04004726 struct nfs_getaclres res = {
4727 .acl_len = buflen,
4728 };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004729 struct rpc_message msg = {
4730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4731 .rpc_argp = &args,
Benny Halevy663c79b2009-04-01 09:21:59 -04004732 .rpc_resp = &res,
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004733 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004734 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4735 int ret = -ENOMEM, i;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004736
Andy Adamsonbf118a32011-12-07 11:55:27 -05004737 /* As long as we're doing a round trip to the server anyway,
4738 * let's be prepared for a page of acl data. */
4739 if (npages == 0)
4740 npages = 1;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004741 if (npages > ARRAY_SIZE(pages))
4742 return -ERANGE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004743
Andy Adamsonbf118a32011-12-07 11:55:27 -05004744 for (i = 0; i < npages; i++) {
4745 pages[i] = alloc_page(GFP_KERNEL);
4746 if (!pages[i])
4747 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004748 }
Sachin Prabhu5a006892012-04-17 14:35:39 +01004749
4750 /* for decoding across pages */
4751 res.acl_scratch = alloc_page(GFP_KERNEL);
4752 if (!res.acl_scratch)
4753 goto out_free;
4754
Andy Adamsonbf118a32011-12-07 11:55:27 -05004755 args.acl_len = npages * PAGE_SIZE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004756
Peng Taode040be2012-01-10 22:42:47 +08004757 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
Andy Adamsonbf118a32011-12-07 11:55:27 -05004758 __func__, buf, buflen, npages, args.acl_len);
4759 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4760 &msg, &args.seq_args, &res.seq_res, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004761 if (ret)
4762 goto out_free;
Andy Adamsonbf118a32011-12-07 11:55:27 -05004763
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004764 /* Handle the case where the passed-in buffer is too short */
4765 if (res.acl_flags & NFS4_ACL_TRUNC) {
4766 /* Did the user only issue a request for the acl length? */
4767 if (buf == NULL)
4768 goto out_ok;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004769 ret = -ERANGE;
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004770 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004771 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004772 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004773 if (buf) {
4774 if (res.acl_len > buflen) {
4775 ret = -ERANGE;
4776 goto out_free;
4777 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004778 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004779 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004780out_ok:
4781 ret = res.acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004782out_free:
Andy Adamsonbf118a32011-12-07 11:55:27 -05004783 for (i = 0; i < npages; i++)
4784 if (pages[i])
4785 __free_page(pages[i]);
Trond Myklebust331818f2012-02-03 18:30:53 -05004786 if (res.acl_scratch)
4787 __free_page(res.acl_scratch);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004788 return ret;
4789}
4790
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004791static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4792{
4793 struct nfs4_exception exception = { };
4794 ssize_t ret;
4795 do {
4796 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
Trond Myklebustc1578b72013-08-12 16:58:42 -04004797 trace_nfs4_get_acl(inode, ret);
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004798 if (ret >= 0)
4799 break;
4800 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4801 } while (exception.retry);
4802 return ret;
4803}
4804
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004805static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4806{
4807 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004808 int ret;
4809
4810 if (!nfs4_server_supports_acls(server))
4811 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004812 ret = nfs_revalidate_inode(server, inode);
4813 if (ret < 0)
4814 return ret;
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004815 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4816 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004817 ret = nfs4_read_cached_acl(inode, buf, buflen);
4818 if (ret != -ENOENT)
Andy Adamsonbf118a32011-12-07 11:55:27 -05004819 /* -ENOENT is returned if there is no ACL or if there is an ACL
4820 * but no cached acl data, just the acl length */
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004821 return ret;
4822 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004823}
4824
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004825static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004826{
4827 struct nfs_server *server = NFS_SERVER(inode);
4828 struct page *pages[NFS4ACL_MAXPAGES];
4829 struct nfs_setaclargs arg = {
4830 .fh = NFS_FH(inode),
4831 .acl_pages = pages,
4832 .acl_len = buflen,
4833 };
Benny Halevy73c403a2009-04-01 09:22:01 -04004834 struct nfs_setaclres res;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004835 struct rpc_message msg = {
4836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4837 .rpc_argp = &arg,
Benny Halevy73c403a2009-04-01 09:22:01 -04004838 .rpc_resp = &res,
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004839 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004840 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
Neil Hormane9e3d722011-03-04 19:26:03 -05004841 int ret, i;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004842
4843 if (!nfs4_server_supports_acls(server))
4844 return -EOPNOTSUPP;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004845 if (npages > ARRAY_SIZE(pages))
4846 return -ERANGE;
Andreas Gruenbacher8fbcf232015-11-03 18:25:34 +01004847 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
Neil Hormane9e3d722011-03-04 19:26:03 -05004848 if (i < 0)
4849 return i;
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04004850 nfs4_inode_return_delegation(inode);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004851 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Neil Hormane9e3d722011-03-04 19:26:03 -05004852
4853 /*
4854 * Free each page after tx, so the only ref left is
4855 * held by the network stack
4856 */
4857 for (; i > 0; i--)
4858 put_page(pages[i-1]);
4859
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004860 /*
4861 * Acl update can result in inode attribute update.
4862 * so mark the attribute cache invalid.
4863 */
4864 spin_lock(&inode->i_lock);
4865 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4866 spin_unlock(&inode->i_lock);
Trond Myklebustf41f7412008-06-11 17:39:04 -04004867 nfs_access_zap_cache(inode);
4868 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004869 return ret;
4870}
4871
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004872static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4873{
4874 struct nfs4_exception exception = { };
4875 int err;
4876 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004877 err = __nfs4_proc_set_acl(inode, buf, buflen);
4878 trace_nfs4_set_acl(inode, err);
4879 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004880 &exception);
4881 } while (exception.retry);
4882 return err;
4883}
4884
David Quigleyaa9c2662013-05-22 12:50:44 -04004885#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4886static int _nfs4_get_security_label(struct inode *inode, void *buf,
4887 size_t buflen)
4888{
4889 struct nfs_server *server = NFS_SERVER(inode);
4890 struct nfs_fattr fattr;
4891 struct nfs4_label label = {0, 0, buflen, buf};
4892
4893 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004894 struct nfs4_getattr_arg arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004895 .fh = NFS_FH(inode),
4896 .bitmask = bitmask,
4897 };
4898 struct nfs4_getattr_res res = {
4899 .fattr = &fattr,
4900 .label = &label,
4901 .server = server,
4902 };
4903 struct rpc_message msg = {
4904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004905 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004906 .rpc_resp = &res,
4907 };
4908 int ret;
4909
4910 nfs_fattr_init(&fattr);
4911
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004912 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
David Quigleyaa9c2662013-05-22 12:50:44 -04004913 if (ret)
4914 return ret;
4915 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4916 return -ENOENT;
4917 if (buflen < label.len)
4918 return -ERANGE;
4919 return 0;
4920}
4921
4922static int nfs4_get_security_label(struct inode *inode, void *buf,
4923 size_t buflen)
4924{
4925 struct nfs4_exception exception = { };
4926 int err;
4927
4928 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4929 return -EOPNOTSUPP;
4930
4931 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004932 err = _nfs4_get_security_label(inode, buf, buflen);
4933 trace_nfs4_get_security_label(inode, err);
4934 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004935 &exception);
4936 } while (exception.retry);
4937 return err;
4938}
4939
4940static int _nfs4_do_set_security_label(struct inode *inode,
4941 struct nfs4_label *ilabel,
4942 struct nfs_fattr *fattr,
4943 struct nfs4_label *olabel)
4944{
4945
4946 struct iattr sattr = {0};
4947 struct nfs_server *server = NFS_SERVER(inode);
4948 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Jeff Layton12207f62013-11-01 10:49:32 -04004949 struct nfs_setattrargs arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004950 .fh = NFS_FH(inode),
4951 .iap = &sattr,
4952 .server = server,
4953 .bitmask = bitmask,
4954 .label = ilabel,
4955 };
4956 struct nfs_setattrres res = {
4957 .fattr = fattr,
4958 .label = olabel,
4959 .server = server,
4960 };
4961 struct rpc_message msg = {
4962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
Jeff Layton12207f62013-11-01 10:49:32 -04004963 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004964 .rpc_resp = &res,
4965 };
4966 int status;
4967
Jeff Layton12207f62013-11-01 10:49:32 -04004968 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
David Quigleyaa9c2662013-05-22 12:50:44 -04004969
Jeff Layton12207f62013-11-01 10:49:32 -04004970 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04004971 if (status)
4972 dprintk("%s failed: %d\n", __func__, status);
4973
4974 return status;
4975}
4976
4977static int nfs4_do_set_security_label(struct inode *inode,
4978 struct nfs4_label *ilabel,
4979 struct nfs_fattr *fattr,
4980 struct nfs4_label *olabel)
4981{
4982 struct nfs4_exception exception = { };
4983 int err;
4984
4985 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004986 err = _nfs4_do_set_security_label(inode, ilabel,
4987 fattr, olabel);
4988 trace_nfs4_set_security_label(inode, err);
4989 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004990 &exception);
4991 } while (exception.retry);
4992 return err;
4993}
4994
4995static int
4996nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4997{
4998 struct nfs4_label ilabel, *olabel = NULL;
4999 struct nfs_fattr fattr;
5000 struct rpc_cred *cred;
David Howells2b0143b2015-03-17 22:25:59 +00005001 struct inode *inode = d_inode(dentry);
David Quigleyaa9c2662013-05-22 12:50:44 -04005002 int status;
5003
5004 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5005 return -EOPNOTSUPP;
5006
5007 nfs_fattr_init(&fattr);
5008
5009 ilabel.pi = 0;
5010 ilabel.lfs = 0;
5011 ilabel.label = (char *)buf;
5012 ilabel.len = buflen;
5013
5014 cred = rpc_lookup_cred();
5015 if (IS_ERR(cred))
5016 return PTR_ERR(cred);
5017
5018 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5019 if (IS_ERR(olabel)) {
5020 status = -PTR_ERR(olabel);
5021 goto out;
5022 }
5023
5024 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5025 if (status == 0)
5026 nfs_setsecurity(inode, &fattr, olabel);
5027
5028 nfs4_label_free(olabel);
5029out:
5030 put_rpccred(cred);
5031 return status;
5032}
5033#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5034
5035
Chuck Leverf0920752012-05-21 22:45:41 -04005036static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5037 nfs4_verifier *bootverf)
Chuck Levercd937102012-03-02 17:14:31 -05005038{
5039 __be32 verf[2];
5040
Chuck Lever2c820d92012-05-21 22:45:33 -04005041 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5042 /* An impossible timestamp guarantees this value
5043 * will never match a generated boot time. */
5044 verf[0] = 0;
Trond Myklebust17f26b12013-08-21 15:48:42 -04005045 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
Chuck Lever2c820d92012-05-21 22:45:33 -04005046 } else {
Chuck Leverf0920752012-05-21 22:45:41 -04005047 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Trond Myklebust17f26b12013-08-21 15:48:42 -04005048 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5049 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
Chuck Lever2c820d92012-05-21 22:45:33 -04005050 }
Chuck Levercd937102012-03-02 17:14:31 -05005051 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5052}
5053
Jeff Laytona3192682015-06-09 19:43:59 -04005054static int
5055nfs4_init_nonuniform_client_string(struct nfs_client *clp)
Chuck Levere984a552012-09-14 17:24:21 -04005056{
Jeff Laytona3192682015-06-09 19:43:59 -04005057 size_t len;
5058 char *str;
Chuck Levere984a552012-09-14 17:24:21 -04005059
Trond Myklebustceb3a162015-01-03 15:16:04 -05005060 if (clp->cl_owner_id != NULL)
Jeff Laytona3192682015-06-09 19:43:59 -04005061 return 0;
Kinglong Mee4a3e5772015-08-31 10:53:43 +08005062
Jeff Laytona3192682015-06-09 19:43:59 -04005063 rcu_read_lock();
Kinglong Mee4a703162015-08-31 10:53:33 +08005064 len = 14 + strlen(clp->cl_ipaddr) + 1 +
Jeff Laytona3192682015-06-09 19:43:59 -04005065 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5066 1 +
5067 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5068 1;
5069 rcu_read_unlock();
5070
5071 if (len > NFS4_OPAQUE_LIMIT + 1)
5072 return -EINVAL;
5073
5074 /*
5075 * Since this string is allocated at mount time, and held until the
5076 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5077 * about a memory-reclaim deadlock.
5078 */
5079 str = kmalloc(len, GFP_KERNEL);
5080 if (!str)
5081 return -ENOMEM;
Trond Myklebustceb3a162015-01-03 15:16:04 -05005082
Chuck Levere984a552012-09-14 17:24:21 -04005083 rcu_read_lock();
Trond Myklebustf2dd4362015-10-08 11:33:17 -04005084 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
Jeff Laytona3192682015-06-09 19:43:59 -04005085 clp->cl_ipaddr,
5086 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5087 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
Chuck Levere984a552012-09-14 17:24:21 -04005088 rcu_read_unlock();
Jeff Laytona3192682015-06-09 19:43:59 -04005089
Jeff Laytona3192682015-06-09 19:43:59 -04005090 clp->cl_owner_id = str;
5091 return 0;
Chuck Levere984a552012-09-14 17:24:21 -04005092}
5093
Jeff Layton873e3852015-06-09 19:44:00 -04005094static int
5095nfs4_init_uniquifier_client_string(struct nfs_client *clp)
Chuck Levere984a552012-09-14 17:24:21 -04005096{
Jeff Layton873e3852015-06-09 19:44:00 -04005097 size_t len;
5098 char *str;
5099
5100 len = 10 + 10 + 1 + 10 + 1 +
5101 strlen(nfs4_client_id_uniquifier) + 1 +
5102 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5103
5104 if (len > NFS4_OPAQUE_LIMIT + 1)
5105 return -EINVAL;
5106
5107 /*
5108 * Since this string is allocated at mount time, and held until the
5109 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5110 * about a memory-reclaim deadlock.
5111 */
5112 str = kmalloc(len, GFP_KERNEL);
5113 if (!str)
5114 return -ENOMEM;
5115
Trond Myklebustf2dd4362015-10-08 11:33:17 -04005116 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
Jeff Layton873e3852015-06-09 19:44:00 -04005117 clp->rpc_ops->version, clp->cl_minorversion,
5118 nfs4_client_id_uniquifier,
5119 clp->cl_rpcclient->cl_nodename);
Jeff Layton873e3852015-06-09 19:44:00 -04005120 clp->cl_owner_id = str;
5121 return 0;
5122}
5123
5124static int
5125nfs4_init_uniform_client_string(struct nfs_client *clp)
5126{
Jeff Layton873e3852015-06-09 19:44:00 -04005127 size_t len;
5128 char *str;
Trond Myklebustceb3a162015-01-03 15:16:04 -05005129
5130 if (clp->cl_owner_id != NULL)
Jeff Layton873e3852015-06-09 19:44:00 -04005131 return 0;
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04005132
5133 if (nfs4_client_id_uniquifier[0] != '\0')
Jeff Layton873e3852015-06-09 19:44:00 -04005134 return nfs4_init_uniquifier_client_string(clp);
5135
5136 len = 10 + 10 + 1 + 10 + 1 +
5137 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5138
5139 if (len > NFS4_OPAQUE_LIMIT + 1)
5140 return -EINVAL;
5141
5142 /*
5143 * Since this string is allocated at mount time, and held until the
5144 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5145 * about a memory-reclaim deadlock.
5146 */
5147 str = kmalloc(len, GFP_KERNEL);
5148 if (!str)
5149 return -ENOMEM;
5150
Trond Myklebustf2dd4362015-10-08 11:33:17 -04005151 scnprintf(str, len, "Linux NFSv%u.%u %s",
Jeff Layton873e3852015-06-09 19:44:00 -04005152 clp->rpc_ops->version, clp->cl_minorversion,
5153 clp->cl_rpcclient->cl_nodename);
Jeff Layton873e3852015-06-09 19:44:00 -04005154 clp->cl_owner_id = str;
5155 return 0;
Chuck Levere984a552012-09-14 17:24:21 -04005156}
5157
Chuck Lever706cb8d2014-03-12 12:51:47 -04005158/*
5159 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5160 * services. Advertise one based on the address family of the
5161 * clientaddr.
5162 */
5163static unsigned int
5164nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5165{
5166 if (strchr(clp->cl_ipaddr, ':') != NULL)
5167 return scnprintf(buf, len, "tcp6");
5168 else
5169 return scnprintf(buf, len, "tcp");
5170}
5171
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005172static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5173{
5174 struct nfs4_setclientid *sc = calldata;
5175
5176 if (task->tk_status == 0)
5177 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5178}
5179
5180static const struct rpc_call_ops nfs4_setclientid_ops = {
5181 .rpc_call_done = nfs4_setclientid_done,
5182};
5183
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005184/**
5185 * nfs4_proc_setclientid - Negotiate client ID
5186 * @clp: state data structure
5187 * @program: RPC program for NFSv4 callback service
5188 * @port: IP port number for NFS4 callback service
5189 * @cred: RPC credential to use for this call
5190 * @res: where to place the result
5191 *
5192 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5193 */
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005194int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5195 unsigned short port, struct rpc_cred *cred,
5196 struct nfs4_setclientid_res *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005197{
5198 nfs4_verifier sc_verifier;
5199 struct nfs4_setclientid setclientid = {
5200 .sc_verifier = &sc_verifier,
5201 .sc_prog = program,
Jeff Layton3a6bb732015-06-09 19:43:57 -04005202 .sc_clnt = clp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005203 };
5204 struct rpc_message msg = {
5205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5206 .rpc_argp = &setclientid,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005207 .rpc_resp = res,
Trond Myklebust286d7d62006-01-03 09:55:26 +01005208 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005209 };
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005210 struct rpc_task *task;
5211 struct rpc_task_setup task_setup_data = {
5212 .rpc_client = clp->cl_rpcclient,
5213 .rpc_message = &msg,
5214 .callback_ops = &nfs4_setclientid_ops,
5215 .callback_data = &setclientid,
5216 .flags = RPC_TASK_TIMEOUT,
5217 };
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005218 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005219
Chuck Leverde734832012-07-11 16:30:50 -04005220 /* nfs_client_id4 */
Chuck Leverf0920752012-05-21 22:45:41 -04005221 nfs4_init_boot_verifier(clp, &sc_verifier);
Jeff Layton873e3852015-06-09 19:44:00 -04005222
5223 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5224 status = nfs4_init_uniform_client_string(clp);
5225 else
Jeff Laytona3192682015-06-09 19:43:59 -04005226 status = nfs4_init_nonuniform_client_string(clp);
Jeff Layton873e3852015-06-09 19:44:00 -04005227
5228 if (status)
5229 goto out;
Jeff Layton3a6bb732015-06-09 19:43:57 -04005230
Chuck Leverde734832012-07-11 16:30:50 -04005231 /* cb_client4 */
Chuck Lever706cb8d2014-03-12 12:51:47 -04005232 setclientid.sc_netid_len =
5233 nfs4_init_callback_netid(clp,
5234 setclientid.sc_netid,
5235 sizeof(setclientid.sc_netid));
Chuck Leverde734832012-07-11 16:30:50 -04005236 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05005237 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07005238 clp->cl_ipaddr, port >> 8, port & 255);
5239
Jeff Layton3a6bb732015-06-09 19:43:57 -04005240 dprintk("NFS call setclientid auth=%s, '%s'\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005241 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Jeff Layton3a6bb732015-06-09 19:43:57 -04005242 clp->cl_owner_id);
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005243 task = rpc_run_task(&task_setup_data);
5244 if (IS_ERR(task)) {
5245 status = PTR_ERR(task);
5246 goto out;
5247 }
5248 status = task->tk_status;
5249 if (setclientid.sc_cred) {
5250 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5251 put_rpccred(setclientid.sc_cred);
5252 }
5253 rpc_put_task(task);
5254out:
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005255 trace_nfs4_setclientid(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005256 dprintk("NFS reply setclientid: %d\n", status);
5257 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005258}
5259
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005260/**
5261 * nfs4_proc_setclientid_confirm - Confirm client ID
5262 * @clp: state data structure
5263 * @res: result of a previous SETCLIENTID
5264 * @cred: RPC credential to use for this call
5265 *
5266 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5267 */
Trond Myklebustfd954ae2011-04-24 14:28:18 -04005268int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005269 struct nfs4_setclientid_res *arg,
5270 struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005271{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005272 struct rpc_message msg = {
5273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005274 .rpc_argp = arg,
Trond Myklebust286d7d62006-01-03 09:55:26 +01005275 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005276 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005277 int status;
5278
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005279 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5280 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5281 clp->cl_clientid);
Trond Myklebust1bd714f2011-04-24 14:29:33 -04005282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005283 trace_nfs4_setclientid_confirm(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005284 dprintk("NFS reply setclientid_confirm: %d\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005285 return status;
5286}
5287
Trond Myklebustfe650402006-01-03 09:55:18 +01005288struct nfs4_delegreturndata {
5289 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005290 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01005291 struct nfs_fh fh;
5292 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005293 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005294 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01005295 int rpc_status;
Peng Tao039b7562014-07-03 13:05:02 +08005296 struct inode *inode;
5297 bool roc;
5298 u32 roc_barrier;
Trond Myklebustfe650402006-01-03 09:55:18 +01005299};
5300
Trond Myklebustfe650402006-01-03 09:55:18 +01005301static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5302{
5303 struct nfs4_delegreturndata *data = calldata;
Andy Adamson938e1012009-04-01 09:22:28 -04005304
Trond Myklebust14516c32010-07-31 14:29:06 -04005305 if (!nfs4_sequence_done(task, &data->res.seq_res))
5306 return;
Andy Adamson938e1012009-04-01 09:22:28 -04005307
Trond Myklebustca8acf82013-08-13 10:36:56 -04005308 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005309 switch (task->tk_status) {
Ricardo Labiaga79708862009-12-07 09:23:21 -05005310 case 0:
Trond Myklebustfa178f22006-01-03 09:55:38 +01005311 renew_lease(data->res.server, data->timestamp);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005312 case -NFS4ERR_ADMIN_REVOKED:
5313 case -NFS4ERR_DELEG_REVOKED:
5314 case -NFS4ERR_BAD_STATEID:
5315 case -NFS4ERR_OLD_STATEID:
5316 case -NFS4ERR_STALE_STATEID:
5317 case -NFS4ERR_EXPIRED:
5318 task->tk_status = 0;
Peng Tao039b7562014-07-03 13:05:02 +08005319 if (data->roc)
5320 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005321 break;
Ricardo Labiaga79708862009-12-07 09:23:21 -05005322 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10005323 if (nfs4_async_handle_error(task, data->res.server,
5324 NULL, NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005325 rpc_restart_call_prepare(task);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005326 return;
5327 }
5328 }
5329 data->rpc_status = task->tk_status;
Trond Myklebustfe650402006-01-03 09:55:18 +01005330}
5331
5332static void nfs4_delegreturn_release(void *calldata)
5333{
Peng Tao039b7562014-07-03 13:05:02 +08005334 struct nfs4_delegreturndata *data = calldata;
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005335 struct inode *inode = data->inode;
Peng Tao039b7562014-07-03 13:05:02 +08005336
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005337 if (inode) {
5338 if (data->roc)
5339 pnfs_roc_release(inode);
5340 nfs_iput_and_deactive(inode);
5341 }
Trond Myklebustfe650402006-01-03 09:55:18 +01005342 kfree(calldata);
5343}
5344
Andy Adamson938e1012009-04-01 09:22:28 -04005345static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5346{
5347 struct nfs4_delegreturndata *d_data;
5348
5349 d_data = (struct nfs4_delegreturndata *)data;
5350
Peng Tao500d7012015-09-22 11:35:22 +08005351 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5352 return;
5353
Trond Myklebust4ff376f2015-08-18 23:23:21 -05005354 if (d_data->roc)
5355 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
Peng Tao039b7562014-07-03 13:05:02 +08005356
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005357 nfs4_setup_sequence(d_data->res.server,
5358 &d_data->args.seq_args,
5359 &d_data->res.seq_res,
5360 task);
Andy Adamson938e1012009-04-01 09:22:28 -04005361}
Andy Adamson938e1012009-04-01 09:22:28 -04005362
Jesper Juhlc8d149f2006-03-20 13:44:07 -05005363static const struct rpc_call_ops nfs4_delegreturn_ops = {
Andy Adamson938e1012009-04-01 09:22:28 -04005364 .rpc_call_prepare = nfs4_delegreturn_prepare,
Trond Myklebustfe650402006-01-03 09:55:18 +01005365 .rpc_call_done = nfs4_delegreturn_done,
5366 .rpc_release = nfs4_delegreturn_release,
5367};
5368
Trond Myklebuste6f81072008-01-24 18:14:34 -05005369static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01005370{
5371 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005372 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005373 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005374 struct rpc_message msg = {
5375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5376 .rpc_cred = cred,
5377 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005378 struct rpc_task_setup task_setup_data = {
5379 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04005380 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005381 .callback_ops = &nfs4_delegreturn_ops,
5382 .flags = RPC_TASK_ASYNC,
5383 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05005384 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01005385
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005386 data = kzalloc(sizeof(*data), GFP_NOFS);
Trond Myklebustfe650402006-01-03 09:55:18 +01005387 if (data == NULL)
5388 return -ENOMEM;
Chuck Levera9c92d62013-08-09 12:48:18 -04005389 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Andrew Elble99ade3c2015-12-02 09:39:51 -05005390
5391 nfs4_state_protect(server->nfs_client,
5392 NFS_SP4_MACH_CRED_CLEANUP,
5393 &task_setup_data.rpc_client, &msg);
5394
Trond Myklebustfe650402006-01-03 09:55:18 +01005395 data->args.fhandle = &data->fh;
5396 data->args.stateid = &data->stateid;
Trond Myklebust9e907fe2012-04-27 13:48:17 -04005397 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01005398 nfs_copy_fh(&data->fh, NFS_FH(inode));
Trond Myklebustf597c532012-03-04 18:13:56 -05005399 nfs4_stateid_copy(&data->stateid, stateid);
Trond Myklebustfa178f22006-01-03 09:55:38 +01005400 data->res.fattr = &data->fattr;
5401 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005402 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005403 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01005404 data->rpc_status = 0;
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005405 data->inode = nfs_igrab_and_active(inode);
5406 if (data->inode)
5407 data->roc = nfs4_roc(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005408
Trond Myklebustc970aa82007-07-14 15:39:59 -04005409 task_setup_data.callback_data = data;
Trond Myklebust1174dd12010-12-21 10:52:24 -05005410 msg.rpc_argp = &data->args;
5411 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005412 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005413 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01005414 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005415 if (!issync)
5416 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01005417 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005418 if (status != 0)
5419 goto out;
5420 status = data->rpc_status;
Trond Myklebuste144cbc2012-04-28 16:05:03 -04005421 if (status == 0)
5422 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5423 else
5424 nfs_refresh_inode(inode, &data->fattr);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005425out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005426 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01005427 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005428}
5429
Trond Myklebuste6f81072008-01-24 18:14:34 -05005430int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005431{
5432 struct nfs_server *server = NFS_SERVER(inode);
5433 struct nfs4_exception exception = { };
5434 int err;
5435 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05005436 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Olga Kornievskaia48c95792015-11-24 13:29:41 -05005437 trace_nfs4_delegreturn(inode, stateid, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005438 switch (err) {
5439 case -NFS4ERR_STALE_STATEID:
5440 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005441 case 0:
5442 return 0;
5443 }
5444 err = nfs4_handle_exception(server, err, &exception);
5445 } while (exception.retry);
5446 return err;
5447}
5448
5449#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5450#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5451
5452/*
5453 * sleep, with exponential backoff, and retry the LOCK operation.
5454 */
5455static unsigned long
5456nfs4_set_lock_task_retry(unsigned long timeout)
5457{
Colin Cross416ad3c2013-05-06 23:50:06 +00005458 freezable_schedule_timeout_killable_unsafe(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005459 timeout <<= 1;
5460 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5461 return NFS4_LOCK_MAXTIMEOUT;
5462 return timeout;
5463}
5464
Linus Torvalds1da177e2005-04-16 15:20:36 -07005465static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5466{
5467 struct inode *inode = state->inode;
5468 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04005469 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005470 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005471 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005472 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005473 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005474 struct nfs_lockt_res res = {
5475 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005476 };
5477 struct rpc_message msg = {
5478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5479 .rpc_argp = &arg,
5480 .rpc_resp = &res,
5481 .rpc_cred = state->owner->so_cred,
5482 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005483 struct nfs4_lock_state *lsp;
5484 int status;
5485
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005486 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005487 status = nfs4_set_lock_state(state, request);
5488 if (status != 0)
5489 goto out;
5490 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005491 arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005492 arg.lock_owner.s_dev = server->s_dev;
Bryan Schumaker7c513052011-03-24 17:12:24 +00005493 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005494 switch (status) {
5495 case 0:
5496 request->fl_type = F_UNLCK;
5497 break;
5498 case -NFS4ERR_DENIED:
5499 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005500 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05005501 request->fl_ops->fl_release_private(request);
Trond Myklebusta6f951d2013-10-01 14:24:58 -04005502 request->fl_ops = NULL;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005503out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005504 return status;
5505}
5506
5507static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5508{
5509 struct nfs4_exception exception = { };
5510 int err;
5511
5512 do {
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005513 err = _nfs4_proc_getlk(state, cmd, request);
5514 trace_nfs4_get_lock(request, state, cmd, err);
5515 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005516 &exception);
5517 } while (exception.retry);
5518 return err;
5519}
5520
Jeff Layton83bfff22015-07-11 06:43:03 -04005521static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005522{
Benjamin Coddington4f656362015-10-22 13:38:14 -04005523 return locks_lock_inode_wait(inode, fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005524}
5525
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005526struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005527 struct nfs_locku_args arg;
5528 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005529 struct nfs4_lock_state *lsp;
5530 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005531 struct file_lock fl;
Trond Myklebust516285eb2015-09-20 16:15:24 -04005532 struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005533 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005534};
5535
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005536static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5537 struct nfs_open_context *ctx,
5538 struct nfs4_lock_state *lsp,
5539 struct nfs_seqid *seqid)
5540{
5541 struct nfs4_unlockdata *p;
5542 struct inode *inode = lsp->ls_state->inode;
5543
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005544 p = kzalloc(sizeof(*p), GFP_NOFS);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005545 if (p == NULL)
5546 return NULL;
5547 p->arg.fh = NFS_FH(inode);
5548 p->arg.fl = &p->fl;
5549 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005550 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005551 p->lsp = lsp;
5552 atomic_inc(&lsp->ls_count);
5553 /* Ensure we don't close file until we're done freeing locks! */
5554 p->ctx = get_nfs_open_context(ctx);
5555 memcpy(&p->fl, fl, sizeof(p->fl));
5556 p->server = NFS_SERVER(inode);
5557 return p;
5558}
5559
Trond Myklebust06f814a2006-01-03 09:55:07 +01005560static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005561{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005562 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005563 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005564 nfs4_put_lock_state(calldata->lsp);
5565 put_nfs_open_context(calldata->ctx);
5566 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005567}
5568
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005569static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005570{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005571 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005572
Trond Myklebust14516c32010-07-31 14:29:06 -04005573 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5574 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005575 switch (task->tk_status) {
5576 case 0:
Trond Myklebust26e976a2006-01-03 09:55:21 +01005577 renew_lease(calldata->server, calldata->timestamp);
Jeff Layton83bfff22015-07-11 06:43:03 -04005578 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005579 if (nfs4_update_lock_stateid(calldata->lsp,
5580 &calldata->res.stateid))
5581 break;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005582 case -NFS4ERR_BAD_STATEID:
5583 case -NFS4ERR_OLD_STATEID:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005584 case -NFS4ERR_STALE_STATEID:
5585 case -NFS4ERR_EXPIRED:
Trond Myklebust425c1d42015-01-24 14:57:53 -05005586 if (!nfs4_stateid_match(&calldata->arg.stateid,
5587 &calldata->lsp->ls_stateid))
5588 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005589 break;
5590 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10005591 if (nfs4_async_handle_error(task, calldata->server,
5592 NULL, NULL) == -EAGAIN)
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005593 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005594 }
Trond Myklebust2b1bc302012-10-29 18:53:23 -04005595 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005596}
5597
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005598static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005599{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005600 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005601
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005602 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005603 goto out_wait;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005604 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005605 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005606 /* Note: exit _without_ running nfs4_locku_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005607 goto out_no_action;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005608 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005609 calldata->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005610 if (nfs4_setup_sequence(calldata->server,
Andy Adamsona8936932009-04-01 09:22:23 -04005611 &calldata->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005612 &calldata->res.seq_res,
5613 task) != 0)
5614 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005615 return;
5616out_no_action:
5617 task->tk_action = NULL;
5618out_wait:
5619 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005620}
5621
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005622static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005623 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005624 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01005625 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005626};
5627
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005628static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5629 struct nfs_open_context *ctx,
5630 struct nfs4_lock_state *lsp,
5631 struct nfs_seqid *seqid)
5632{
5633 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005634 struct rpc_message msg = {
5635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5636 .rpc_cred = ctx->cred,
5637 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005638 struct rpc_task_setup task_setup_data = {
5639 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005640 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005641 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005642 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005643 .flags = RPC_TASK_ASYNC,
5644 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005645
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04005646 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5647 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5648
Frank Filz137d6ac2007-07-09 15:32:29 -07005649 /* Ensure this is an unlock - when canceling a lock, the
5650 * canceled lock is passed in, and it won't be an unlock.
5651 */
5652 fl->fl_type = F_UNLCK;
5653
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005654 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5655 if (data == NULL) {
5656 nfs_free_seqid(seqid);
5657 return ERR_PTR(-ENOMEM);
5658 }
5659
Chuck Levera9c92d62013-08-09 12:48:18 -04005660 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005661 msg.rpc_argp = &data->arg;
5662 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005663 task_setup_data.callback_data = data;
5664 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005665}
5666
Linus Torvalds1da177e2005-04-16 15:20:36 -07005667static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5668{
Trond Myklebust65b62a22013-02-07 10:54:07 -05005669 struct inode *inode = state->inode;
5670 struct nfs4_state_owner *sp = state->owner;
5671 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005672 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005673 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01005674 struct rpc_task *task;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005675 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005676 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005677 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005678
Trond Myklebust9b073572006-06-29 16:38:34 -04005679 status = nfs4_set_lock_state(state, request);
5680 /* Unlock _before_ we do the RPC call */
5681 request->fl_flags |= FL_EXISTS;
Trond Myklebust65b62a22013-02-07 10:54:07 -05005682 /* Exclude nfs_delegation_claim_locks() */
5683 mutex_lock(&sp->so_delegreturn_mutex);
5684 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005685 down_read(&nfsi->rwsem);
Jeff Layton83bfff22015-07-11 06:43:03 -04005686 if (do_vfs_lock(inode, request) == -ENOENT) {
Trond Myklebust19e03c52008-12-23 15:21:44 -05005687 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005688 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005689 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005690 }
5691 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005692 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005693 if (status != 0)
5694 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005695 /* Is this a delegated lock? */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005696 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebustc5a2a152013-04-30 12:43:42 -04005697 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5698 goto out;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005699 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5700 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
Trond Myklebust9b073572006-06-29 16:38:34 -04005701 status = -ENOMEM;
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005702 if (IS_ERR(seqid))
Trond Myklebust9b073572006-06-29 16:38:34 -04005703 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005704 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005705 status = PTR_ERR(task);
5706 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04005707 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005708 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005709 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04005710out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005711 request->fl_flags = fl_flags;
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005712 trace_nfs4_unlock(request, state, F_SETLK, status);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005713 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005714}
5715
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005716struct nfs4_lockdata {
5717 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005718 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005719 struct nfs4_lock_state *lsp;
5720 struct nfs_open_context *ctx;
5721 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005722 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005723 int rpc_status;
5724 int cancelled;
Andy Adamson66179ef2009-04-01 09:22:22 -04005725 struct nfs_server *server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005726};
5727
5728static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005729 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5730 gfp_t gfp_mask)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005731{
5732 struct nfs4_lockdata *p;
5733 struct inode *inode = lsp->ls_state->inode;
5734 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustb4019c02015-01-24 14:19:19 -05005735 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005736
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005737 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005738 if (p == NULL)
5739 return NULL;
5740
5741 p->arg.fh = NFS_FH(inode);
5742 p->arg.fl = &p->fl;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005743 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005744 if (IS_ERR(p->arg.open_seqid))
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005745 goto out_free;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005746 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5747 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005748 if (IS_ERR(p->arg.lock_seqid))
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005749 goto out_free_seqid;
David Howells7539bba2006-08-22 20:06:09 -04005750 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005751 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005752 p->arg.lock_owner.s_dev = server->s_dev;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005753 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005754 p->lsp = lsp;
Andy Adamson66179ef2009-04-01 09:22:22 -04005755 p->server = server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005756 atomic_inc(&lsp->ls_count);
5757 p->ctx = get_nfs_open_context(ctx);
Jeff Laytonfeaff8e2015-05-12 15:48:10 -04005758 get_file(fl->fl_file);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005759 memcpy(&p->fl, fl, sizeof(p->fl));
5760 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005761out_free_seqid:
5762 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005763out_free:
5764 kfree(p);
5765 return NULL;
5766}
5767
5768static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5769{
5770 struct nfs4_lockdata *data = calldata;
5771 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005772
Harvey Harrison3110ff82008-05-02 13:42:44 -07005773 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005774 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005775 goto out_wait;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005776 /* Do we need to do an open_to_lock_owner? */
Trond Myklebust6b447532015-01-24 18:38:15 -05005777 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005778 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005779 goto out_release_lock_seqid;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005780 }
Trond Myklebust425c1d42015-01-24 14:57:53 -05005781 nfs4_stateid_copy(&data->arg.open_stateid,
5782 &state->open_stateid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005783 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005784 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005785 } else {
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005786 data->arg.new_lock_owner = 0;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005787 nfs4_stateid_copy(&data->arg.lock_stateid,
5788 &data->lsp->ls_stateid);
5789 }
Trond Myklebust5d422302013-03-14 16:57:48 -04005790 if (!nfs4_valid_open_stateid(state)) {
5791 data->rpc_status = -EBADF;
5792 task->tk_action = NULL;
5793 goto out_release_open_seqid;
5794 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005795 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005796 if (nfs4_setup_sequence(data->server,
5797 &data->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005798 &data->res.seq_res,
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005799 task) == 0)
Andy Adamson66179ef2009-04-01 09:22:22 -04005800 return;
Trond Myklebust5d422302013-03-14 16:57:48 -04005801out_release_open_seqid:
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005802 nfs_release_seqid(data->arg.open_seqid);
5803out_release_lock_seqid:
5804 nfs_release_seqid(data->arg.lock_seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005805out_wait:
5806 nfs4_sequence_done(task, &data->res.seq_res);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005807 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08005808}
5809
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005810static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5811{
5812 struct nfs4_lockdata *data = calldata;
Trond Myklebust39071e62015-01-24 15:07:56 -05005813 struct nfs4_lock_state *lsp = data->lsp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005814
Harvey Harrison3110ff82008-05-02 13:42:44 -07005815 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005816
Trond Myklebust14516c32010-07-31 14:29:06 -04005817 if (!nfs4_sequence_done(task, &data->res.seq_res))
5818 return;
Andy Adamson66179ef2009-04-01 09:22:22 -04005819
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005820 data->rpc_status = task->tk_status;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005821 switch (task->tk_status) {
5822 case 0:
David Howells2b0143b2015-03-17 22:25:59 +00005823 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
Trond Myklebust39071e62015-01-24 15:07:56 -05005824 data->timestamp);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005825 if (data->arg.new_lock) {
5826 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
Jeff Layton83bfff22015-07-11 06:43:03 -04005827 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
Trond Myklebustc69899a2015-01-24 16:03:52 -05005828 rpc_restart_call_prepare(task);
5829 break;
5830 }
5831 }
Trond Myklebust39071e62015-01-24 15:07:56 -05005832 if (data->arg.new_lock_owner != 0) {
5833 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5834 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5835 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5836 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5837 rpc_restart_call_prepare(task);
Trond Myklebust425c1d42015-01-24 14:57:53 -05005838 break;
5839 case -NFS4ERR_BAD_STATEID:
5840 case -NFS4ERR_OLD_STATEID:
5841 case -NFS4ERR_STALE_STATEID:
5842 case -NFS4ERR_EXPIRED:
5843 if (data->arg.new_lock_owner != 0) {
5844 if (!nfs4_stateid_match(&data->arg.open_stateid,
5845 &lsp->ls_state->open_stateid))
5846 rpc_restart_call_prepare(task);
5847 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5848 &lsp->ls_stateid))
5849 rpc_restart_call_prepare(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005850 }
Harvey Harrison3110ff82008-05-02 13:42:44 -07005851 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005852}
5853
5854static void nfs4_lock_release(void *calldata)
5855{
5856 struct nfs4_lockdata *data = calldata;
5857
Harvey Harrison3110ff82008-05-02 13:42:44 -07005858 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005859 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005860 if (data->cancelled != 0) {
5861 struct rpc_task *task;
5862 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5863 data->arg.lock_seqid);
5864 if (!IS_ERR(task))
Trond Myklebustbf294b42011-02-21 11:05:41 -08005865 rpc_put_task_async(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005866 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005867 } else
5868 nfs_free_seqid(data->arg.lock_seqid);
5869 nfs4_put_lock_state(data->lsp);
5870 put_nfs_open_context(data->ctx);
Jeff Laytonfeaff8e2015-05-12 15:48:10 -04005871 fput(data->fl.fl_file);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005872 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005873 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005874}
5875
5876static const struct rpc_call_ops nfs4_lock_ops = {
5877 .rpc_call_prepare = nfs4_lock_prepare,
5878 .rpc_call_done = nfs4_lock_done,
5879 .rpc_release = nfs4_lock_release,
5880};
5881
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005882static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5883{
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005884 switch (error) {
5885 case -NFS4ERR_ADMIN_REVOKED:
5886 case -NFS4ERR_BAD_STATEID:
Trond Myklebustecac7992011-03-09 16:00:56 -05005887 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005888 if (new_lock_owner != 0 ||
Trond Myklebust795a88c2012-09-10 13:26:49 -04005889 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
Trond Myklebustecac7992011-03-09 16:00:56 -05005890 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005891 break;
5892 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005893 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebustecac7992011-03-09 16:00:56 -05005894 case -NFS4ERR_EXPIRED:
5895 nfs4_schedule_lease_recovery(server->nfs_client);
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005896 };
5897}
5898
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005899static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005900{
5901 struct nfs4_lockdata *data;
5902 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005903 struct rpc_message msg = {
5904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5905 .rpc_cred = state->owner->so_cred,
5906 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005907 struct rpc_task_setup task_setup_data = {
5908 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005909 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005910 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005911 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005912 .flags = RPC_TASK_ASYNC,
5913 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005914 int ret;
5915
Harvey Harrison3110ff82008-05-02 13:42:44 -07005916 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005917 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005918 fl->fl_u.nfs4_fl.owner,
5919 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005920 if (data == NULL)
5921 return -ENOMEM;
5922 if (IS_SETLKW(cmd))
5923 data->arg.block = 1;
Chuck Levera9c92d62013-08-09 12:48:18 -04005924 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005925 msg.rpc_argp = &data->arg;
5926 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005927 task_setup_data.callback_data = data;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005928 if (recovery_type > NFS_LOCK_NEW) {
5929 if (recovery_type == NFS_LOCK_RECLAIM)
5930 data->arg.reclaim = NFS_LOCK_RECLAIM;
5931 nfs4_set_sequence_privileged(&data->arg.seq_args);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005932 } else
5933 data->arg.new_lock = 1;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005934 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005935 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005936 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005937 ret = nfs4_wait_for_completion_rpc_task(task);
5938 if (ret == 0) {
5939 ret = data->rpc_status;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005940 if (ret)
5941 nfs4_handle_setlk_error(data->server, data->lsp,
5942 data->arg.new_lock_owner, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005943 } else
5944 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005945 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005946 dprintk("%s: done, ret = %d!\n", __func__, ret);
Olga Kornievskaia48c95792015-11-24 13:29:41 -05005947 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005948 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005949}
5950
5951static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5952{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005953 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005954 struct nfs4_exception exception = {
5955 .inode = state->inode,
5956 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005957 int err;
5958
5959 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005960 /* Cache the lock if possible... */
5961 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5962 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005963 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
Trond Myklebust168667c2010-10-19 19:47:49 -04005964 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00005965 break;
5966 nfs4_handle_exception(server, err, &exception);
5967 } while (exception.retry);
5968 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005969}
5970
5971static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5972{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005973 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005974 struct nfs4_exception exception = {
5975 .inode = state->inode,
5976 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005977 int err;
5978
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005979 err = nfs4_set_lock_state(state, request);
5980 if (err != 0)
5981 return err;
Trond Myklebustf6de7a32013-09-04 10:08:54 -04005982 if (!recover_lost_locks) {
NeilBrownef1820f2013-09-04 17:04:49 +10005983 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5984 return 0;
5985 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005986 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005987 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5988 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005989 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005990 switch (err) {
5991 default:
5992 goto out;
5993 case -NFS4ERR_GRACE:
5994 case -NFS4ERR_DELAY:
5995 nfs4_handle_exception(server, err, &exception);
5996 err = 0;
5997 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005998 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005999out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00006000 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006001}
6002
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006003#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04006004/**
6005 * nfs41_check_expired_locks - possibly free a lock stateid
6006 *
6007 * @state: NFSv4 state for an inode
6008 *
6009 * Returns NFS_OK if recovery for this stateid is now finished.
6010 * Otherwise a negative NFS4ERR value is returned.
6011 */
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006012static int nfs41_check_expired_locks(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006013{
Chuck Levereb64cf92012-07-11 16:30:05 -04006014 int status, ret = -NFS4ERR_BAD_STATEID;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006015 struct nfs4_lock_state *lsp;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006016 struct nfs_server *server = NFS_SERVER(state->inode);
6017
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006018 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
Trond Myklebust795a88c2012-09-10 13:26:49 -04006019 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04006020 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6021
6022 status = nfs41_test_stateid(server,
6023 &lsp->ls_stateid,
6024 cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04006025 trace_nfs4_test_lock_stateid(state, lsp, status);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006026 if (status != NFS_OK) {
Chuck Lever3e60ffd2012-07-11 16:30:14 -04006027 /* Free the stateid unless the server
6028 * informs us the stateid is unrecognized. */
Chuck Lever89af2732012-07-11 16:29:56 -04006029 if (status != -NFS4ERR_BAD_STATEID)
6030 nfs41_free_stateid(server,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04006031 &lsp->ls_stateid,
6032 cred);
Trond Myklebust795a88c2012-09-10 13:26:49 -04006033 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006034 ret = status;
6035 }
6036 }
6037 };
6038
6039 return ret;
6040}
6041
6042static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6043{
6044 int status = NFS_OK;
6045
6046 if (test_bit(LK_STATE_IN_USE, &state->flags))
6047 status = nfs41_check_expired_locks(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04006048 if (status != NFS_OK)
6049 status = nfs4_lock_expired(state, request);
6050 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006051}
6052#endif
6053
Linus Torvalds1da177e2005-04-16 15:20:36 -07006054static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6055{
Trond Myklebust19e03c52008-12-23 15:21:44 -05006056 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006057 unsigned char fl_flags = request->fl_flags;
Trond Myklebust8e469eb2010-01-26 15:42:30 -05006058 int status = -ENOLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006059
Trond Myklebust8e469eb2010-01-26 15:42:30 -05006060 if ((fl_flags & FL_POSIX) &&
6061 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6062 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05006063 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05006064 status = nfs4_set_lock_state(state, request);
6065 if (status != 0)
6066 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04006067 request->fl_flags |= FL_ACCESS;
Jeff Layton83bfff22015-07-11 06:43:03 -04006068 status = do_vfs_lock(state->inode, request);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006069 if (status < 0)
6070 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05006071 down_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006072 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust01c3b862006-06-29 16:38:39 -04006073 /* Yes: cache locks! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04006074 /* ...but avoid races with delegation recall... */
Trond Myklebust19e03c52008-12-23 15:21:44 -05006075 request->fl_flags = fl_flags & ~FL_SLEEP;
Jeff Layton83bfff22015-07-11 06:43:03 -04006076 status = do_vfs_lock(state->inode, request);
Trond Myklebustc69899a2015-01-24 16:03:52 -05006077 up_read(&nfsi->rwsem);
6078 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04006079 }
Trond Myklebust9a99af492013-02-04 20:17:49 -05006080 up_read(&nfsi->rwsem);
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08006081 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006082out:
6083 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006084 return status;
6085}
6086
6087static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6088{
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05006089 struct nfs4_exception exception = {
6090 .state = state,
Trond Myklebust05ffe242012-04-18 12:20:10 -04006091 .inode = state->inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05006092 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07006093 int err;
6094
6095 do {
Trond Myklebust965b5d62009-06-17 13:22:59 -07006096 err = _nfs4_proc_setlk(state, cmd, request);
6097 if (err == -NFS4ERR_DENIED)
6098 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006099 err = nfs4_handle_exception(NFS_SERVER(state->inode),
Trond Myklebust965b5d62009-06-17 13:22:59 -07006100 err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006101 } while (exception.retry);
6102 return err;
6103}
6104
6105static int
6106nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6107{
6108 struct nfs_open_context *ctx;
6109 struct nfs4_state *state;
6110 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6111 int status;
6112
6113 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04006114 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006115 state = ctx->state;
6116
6117 if (request->fl_start < 0 || request->fl_end < 0)
6118 return -EINVAL;
6119
Trond Myklebustd9531262009-07-21 19:22:38 -04006120 if (IS_GETLK(cmd)) {
6121 if (state != NULL)
6122 return nfs4_proc_getlk(state, F_GETLK, request);
6123 return 0;
6124 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006125
6126 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6127 return -EINVAL;
6128
Trond Myklebustd9531262009-07-21 19:22:38 -04006129 if (request->fl_type == F_UNLCK) {
6130 if (state != NULL)
6131 return nfs4_proc_unlck(state, cmd, request);
6132 return 0;
6133 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006134
Trond Myklebustd9531262009-07-21 19:22:38 -04006135 if (state == NULL)
6136 return -ENOLCK;
Trond Myklebust55725512012-04-18 12:48:35 -04006137 /*
6138 * Don't rely on the VFS having checked the file open mode,
6139 * since it won't do this for flock() locks.
6140 */
Jeff Laytonf44106e2012-07-23 15:49:56 -04006141 switch (request->fl_type) {
Trond Myklebust55725512012-04-18 12:48:35 -04006142 case F_RDLCK:
6143 if (!(filp->f_mode & FMODE_READ))
6144 return -EBADF;
6145 break;
6146 case F_WRLCK:
6147 if (!(filp->f_mode & FMODE_WRITE))
6148 return -EBADF;
6149 }
6150
Linus Torvalds1da177e2005-04-16 15:20:36 -07006151 do {
6152 status = nfs4_proc_setlk(state, cmd, request);
6153 if ((status != -EAGAIN) || IS_SETLK(cmd))
6154 break;
6155 timeout = nfs4_set_lock_task_retry(timeout);
6156 status = -ERESTARTSYS;
6157 if (signalled())
6158 break;
6159 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006160 return status;
6161}
6162
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006163int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
Trond Myklebust888e6942005-11-04 15:38:11 -05006164{
6165 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust888e6942005-11-04 15:38:11 -05006166 int err;
6167
6168 err = nfs4_set_lock_state(state, fl);
6169 if (err != 0)
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006170 return err;
Trond Myklebust4a706fa2013-04-01 14:47:22 -04006171 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006172 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
Trond Myklebust888e6942005-11-04 15:38:11 -05006173}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006174
Trond Myklebustcf470c32012-03-07 13:49:12 -05006175struct nfs_release_lockowner_data {
6176 struct nfs4_lock_state *lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006177 struct nfs_server *server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006178 struct nfs_release_lockowner_args args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006179 struct nfs_release_lockowner_res res;
Chuck Lever60ea6812013-10-17 14:13:47 -04006180 unsigned long timestamp;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006181};
6182
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006183static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6184{
6185 struct nfs_release_lockowner_data *data = calldata;
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006186 struct nfs_server *server = data->server;
Peng Taocb04ad22014-06-11 05:24:15 +08006187 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6188 &data->args.seq_args, &data->res.seq_res, task);
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006189 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
Chuck Lever60ea6812013-10-17 14:13:47 -04006190 data->timestamp = jiffies;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006191}
6192
6193static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6194{
6195 struct nfs_release_lockowner_data *data = calldata;
Chuck Lever60ea6812013-10-17 14:13:47 -04006196 struct nfs_server *server = data->server;
6197
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006198 nfs40_sequence_done(task, &data->res.seq_res);
Chuck Lever60ea6812013-10-17 14:13:47 -04006199
6200 switch (task->tk_status) {
6201 case 0:
6202 renew_lease(server, data->timestamp);
6203 break;
6204 case -NFS4ERR_STALE_CLIENTID:
6205 case -NFS4ERR_EXPIRED:
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006206 nfs4_schedule_lease_recovery(server->nfs_client);
6207 break;
Chuck Lever60ea6812013-10-17 14:13:47 -04006208 case -NFS4ERR_LEASE_MOVED:
6209 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10006210 if (nfs4_async_handle_error(task, server,
6211 NULL, NULL) == -EAGAIN)
Chuck Lever60ea6812013-10-17 14:13:47 -04006212 rpc_restart_call_prepare(task);
6213 }
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006214}
6215
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006216static void nfs4_release_lockowner_release(void *calldata)
6217{
Trond Myklebustcf470c32012-03-07 13:49:12 -05006218 struct nfs_release_lockowner_data *data = calldata;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006219 nfs4_free_lock_state(data->server, data->lsp);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006220 kfree(calldata);
6221}
6222
Trond Myklebust17280172012-03-11 13:11:00 -04006223static const struct rpc_call_ops nfs4_release_lockowner_ops = {
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006224 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6225 .rpc_call_done = nfs4_release_lockowner_done,
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006226 .rpc_release = nfs4_release_lockowner_release,
6227};
6228
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006229static void
6230nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006231{
Trond Myklebustcf470c32012-03-07 13:49:12 -05006232 struct nfs_release_lockowner_data *data;
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006233 struct rpc_message msg = {
6234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6235 };
6236
6237 if (server->nfs_client->cl_mvops->minor_version != 0)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006238 return;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006239
Trond Myklebustcf470c32012-03-07 13:49:12 -05006240 data = kmalloc(sizeof(*data), GFP_NOFS);
6241 if (!data)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006242 return;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006243 data->lsp = lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006244 data->server = server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006245 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6246 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6247 data->args.lock_owner.s_dev = server->s_dev;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006248
Trond Myklebustcf470c32012-03-07 13:49:12 -05006249 msg.rpc_argp = &data->args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006250 msg.rpc_resp = &data->res;
6251 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebustcf470c32012-03-07 13:49:12 -05006252 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006253}
6254
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006255#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6256
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006257static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6258 struct dentry *dentry, const char *key,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006259 const void *buf, size_t buflen,
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006260 int flags)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006261{
David Howells2b0143b2015-03-17 22:25:59 +00006262 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006263}
6264
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006265static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6266 struct dentry *dentry, const char *key,
6267 void *buf, size_t buflen)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006268{
David Howells2b0143b2015-03-17 22:25:59 +00006269 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006270}
6271
Andreas Gruenbacher764a5c62015-12-02 14:44:43 +01006272static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006273{
Andreas Gruenbacher764a5c62015-12-02 14:44:43 +01006274 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006275}
6276
David Quigleyc9bccef2013-05-22 12:50:45 -04006277#ifdef CONFIG_NFS_V4_SECURITY_LABEL
David Quigleyc9bccef2013-05-22 12:50:45 -04006278
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006279static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6280 struct dentry *dentry, const char *key,
6281 const void *buf, size_t buflen,
6282 int flags)
David Quigleyc9bccef2013-05-22 12:50:45 -04006283{
6284 if (security_ismaclabel(key))
6285 return nfs4_set_security_label(dentry, buf, buflen);
6286
6287 return -EOPNOTSUPP;
6288}
6289
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006290static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6291 struct dentry *dentry, const char *key,
6292 void *buf, size_t buflen)
David Quigleyc9bccef2013-05-22 12:50:45 -04006293{
6294 if (security_ismaclabel(key))
David Howells2b0143b2015-03-17 22:25:59 +00006295 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
David Quigleyc9bccef2013-05-22 12:50:45 -04006296 return -EOPNOTSUPP;
6297}
6298
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01006299static ssize_t
6300nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
David Quigleyc9bccef2013-05-22 12:50:45 -04006301{
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01006302 int len = 0;
David Quigleyc9bccef2013-05-22 12:50:45 -04006303
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01006304 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6305 len = security_inode_listsecurity(inode, list, list_len);
6306 if (list_len && len > list_len)
6307 return -ERANGE;
David Quigleyc9bccef2013-05-22 12:50:45 -04006308 }
6309 return len;
6310}
6311
6312static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6313 .prefix = XATTR_SECURITY_PREFIX,
David Quigleyc9bccef2013-05-22 12:50:45 -04006314 .get = nfs4_xattr_get_nfs4_label,
6315 .set = nfs4_xattr_set_nfs4_label,
6316};
David Quigleyc9bccef2013-05-22 12:50:45 -04006317
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01006318#else
6319
6320static ssize_t
6321nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6322{
6323 return 0;
6324}
6325
6326#endif
David Quigleyc9bccef2013-05-22 12:50:45 -04006327
Andy Adamson533eb462011-06-13 18:25:56 -04006328/*
6329 * nfs_fhget will use either the mounted_on_fileid or the fileid
6330 */
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006331static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6332{
Andy Adamson533eb462011-06-13 18:25:56 -04006333 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6334 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6335 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Chuck Lever81934dd2012-03-01 17:01:57 -05006336 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006337 return;
6338
6339 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Chuck Lever81934dd2012-03-01 17:01:57 -05006340 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006341 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6342 fattr->nlink = 2;
6343}
6344
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006345static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6346 const struct qstr *name,
6347 struct nfs4_fs_locations *fs_locations,
6348 struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04006349{
6350 struct nfs_server *server = NFS_SERVER(dir);
David Quigleya09df2c2013-05-22 12:50:41 -04006351 u32 bitmask[3] = {
Manoj Naik361e6242006-06-09 09:34:24 -04006352 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006353 };
6354 struct nfs4_fs_locations_arg args = {
6355 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05006356 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006357 .page = page,
6358 .bitmask = bitmask,
6359 };
Benny Halevy22958462009-04-01 09:22:02 -04006360 struct nfs4_fs_locations_res res = {
6361 .fs_locations = fs_locations,
6362 };
Trond Myklebust683b57b2006-06-09 09:34:22 -04006363 struct rpc_message msg = {
6364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6365 .rpc_argp = &args,
Benny Halevy22958462009-04-01 09:22:02 -04006366 .rpc_resp = &res,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006367 };
6368 int status;
6369
Harvey Harrison3110ff82008-05-02 13:42:44 -07006370 dprintk("%s: start\n", __func__);
Andy Adamson533eb462011-06-13 18:25:56 -04006371
6372 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6373 * is not supported */
6374 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6375 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6376 else
6377 bitmask[0] |= FATTR4_WORD0_FILEID;
6378
Trond Myklebustc228fd32007-01-13 02:28:11 -05006379 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006380 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04006381 fs_locations->nlocations = 0;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006382 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -07006383 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006384 return status;
6385}
6386
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006387int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6388 const struct qstr *name,
6389 struct nfs4_fs_locations *fs_locations,
6390 struct page *page)
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006391{
6392 struct nfs4_exception exception = { };
6393 int err;
6394 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006395 err = _nfs4_proc_fs_locations(client, dir, name,
6396 fs_locations, page);
6397 trace_nfs4_get_fs_locations(dir, name, err);
6398 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006399 &exception);
6400 } while (exception.retry);
6401 return err;
6402}
6403
Chuck Leverb03d7352013-10-17 14:12:50 -04006404/*
6405 * This operation also signals the server that this client is
6406 * performing migration recovery. The server can stop returning
6407 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6408 * appended to this compound to identify the client ID which is
6409 * performing recovery.
6410 */
6411static int _nfs40_proc_get_locations(struct inode *inode,
6412 struct nfs4_fs_locations *locations,
6413 struct page *page, struct rpc_cred *cred)
6414{
6415 struct nfs_server *server = NFS_SERVER(inode);
6416 struct rpc_clnt *clnt = server->client;
6417 u32 bitmask[2] = {
6418 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6419 };
6420 struct nfs4_fs_locations_arg args = {
6421 .clientid = server->nfs_client->cl_clientid,
6422 .fh = NFS_FH(inode),
6423 .page = page,
6424 .bitmask = bitmask,
6425 .migration = 1, /* skip LOOKUP */
6426 .renew = 1, /* append RENEW */
6427 };
6428 struct nfs4_fs_locations_res res = {
6429 .fs_locations = locations,
6430 .migration = 1,
6431 .renew = 1,
6432 };
6433 struct rpc_message msg = {
6434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6435 .rpc_argp = &args,
6436 .rpc_resp = &res,
6437 .rpc_cred = cred,
6438 };
6439 unsigned long now = jiffies;
6440 int status;
6441
6442 nfs_fattr_init(&locations->fattr);
6443 locations->server = server;
6444 locations->nlocations = 0;
6445
6446 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6447 nfs4_set_sequence_privileged(&args.seq_args);
6448 status = nfs4_call_sync_sequence(clnt, server, &msg,
6449 &args.seq_args, &res.seq_res);
6450 if (status)
6451 return status;
6452
6453 renew_lease(server, now);
6454 return 0;
6455}
6456
6457#ifdef CONFIG_NFS_V4_1
6458
6459/*
6460 * This operation also signals the server that this client is
6461 * performing migration recovery. The server can stop asserting
6462 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6463 * performing this operation is identified in the SEQUENCE
6464 * operation in this compound.
6465 *
6466 * When the client supports GETATTR(fs_locations_info), it can
6467 * be plumbed in here.
6468 */
6469static int _nfs41_proc_get_locations(struct inode *inode,
6470 struct nfs4_fs_locations *locations,
6471 struct page *page, struct rpc_cred *cred)
6472{
6473 struct nfs_server *server = NFS_SERVER(inode);
6474 struct rpc_clnt *clnt = server->client;
6475 u32 bitmask[2] = {
6476 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6477 };
6478 struct nfs4_fs_locations_arg args = {
6479 .fh = NFS_FH(inode),
6480 .page = page,
6481 .bitmask = bitmask,
6482 .migration = 1, /* skip LOOKUP */
6483 };
6484 struct nfs4_fs_locations_res res = {
6485 .fs_locations = locations,
6486 .migration = 1,
6487 };
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6490 .rpc_argp = &args,
6491 .rpc_resp = &res,
6492 .rpc_cred = cred,
6493 };
6494 int status;
6495
6496 nfs_fattr_init(&locations->fattr);
6497 locations->server = server;
6498 locations->nlocations = 0;
6499
6500 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6501 nfs4_set_sequence_privileged(&args.seq_args);
6502 status = nfs4_call_sync_sequence(clnt, server, &msg,
6503 &args.seq_args, &res.seq_res);
6504 if (status == NFS4_OK &&
6505 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6506 status = -NFS4ERR_LEASE_MOVED;
6507 return status;
6508}
6509
6510#endif /* CONFIG_NFS_V4_1 */
6511
6512/**
6513 * nfs4_proc_get_locations - discover locations for a migrated FSID
6514 * @inode: inode on FSID that is migrating
6515 * @locations: result of query
6516 * @page: buffer
6517 * @cred: credential to use for this operation
6518 *
6519 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6520 * operation failed, or a negative errno if a local error occurred.
6521 *
6522 * On success, "locations" is filled in, but if the server has
6523 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6524 * asserted.
6525 *
6526 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6527 * from this client that require migration recovery.
6528 */
6529int nfs4_proc_get_locations(struct inode *inode,
6530 struct nfs4_fs_locations *locations,
6531 struct page *page, struct rpc_cred *cred)
6532{
6533 struct nfs_server *server = NFS_SERVER(inode);
6534 struct nfs_client *clp = server->nfs_client;
6535 const struct nfs4_mig_recovery_ops *ops =
6536 clp->cl_mvops->mig_recovery_ops;
6537 struct nfs4_exception exception = { };
6538 int status;
6539
6540 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6541 (unsigned long long)server->fsid.major,
6542 (unsigned long long)server->fsid.minor,
6543 clp->cl_hostname);
6544 nfs_display_fhandle(NFS_FH(inode), __func__);
6545
6546 do {
6547 status = ops->get_locations(inode, locations, page, cred);
6548 if (status != -NFS4ERR_DELAY)
6549 break;
6550 nfs4_handle_exception(server, status, &exception);
6551 } while (exception.retry);
6552 return status;
6553}
6554
Chuck Lever44c99932013-10-17 14:13:30 -04006555/*
6556 * This operation also signals the server that this client is
6557 * performing "lease moved" recovery. The server can stop
6558 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6559 * is appended to this compound to identify the client ID which is
6560 * performing recovery.
6561 */
6562static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6563{
6564 struct nfs_server *server = NFS_SERVER(inode);
6565 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6566 struct rpc_clnt *clnt = server->client;
6567 struct nfs4_fsid_present_arg args = {
6568 .fh = NFS_FH(inode),
6569 .clientid = clp->cl_clientid,
6570 .renew = 1, /* append RENEW */
6571 };
6572 struct nfs4_fsid_present_res res = {
6573 .renew = 1,
6574 };
6575 struct rpc_message msg = {
6576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6577 .rpc_argp = &args,
6578 .rpc_resp = &res,
6579 .rpc_cred = cred,
6580 };
6581 unsigned long now = jiffies;
6582 int status;
6583
6584 res.fh = nfs_alloc_fhandle();
6585 if (res.fh == NULL)
6586 return -ENOMEM;
6587
6588 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6589 nfs4_set_sequence_privileged(&args.seq_args);
6590 status = nfs4_call_sync_sequence(clnt, server, &msg,
6591 &args.seq_args, &res.seq_res);
6592 nfs_free_fhandle(res.fh);
6593 if (status)
6594 return status;
6595
6596 do_renew_lease(clp, now);
6597 return 0;
6598}
6599
6600#ifdef CONFIG_NFS_V4_1
6601
6602/*
6603 * This operation also signals the server that this client is
6604 * performing "lease moved" recovery. The server can stop asserting
6605 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6606 * this operation is identified in the SEQUENCE operation in this
6607 * compound.
6608 */
6609static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6610{
6611 struct nfs_server *server = NFS_SERVER(inode);
6612 struct rpc_clnt *clnt = server->client;
6613 struct nfs4_fsid_present_arg args = {
6614 .fh = NFS_FH(inode),
6615 };
6616 struct nfs4_fsid_present_res res = {
6617 };
6618 struct rpc_message msg = {
6619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6620 .rpc_argp = &args,
6621 .rpc_resp = &res,
6622 .rpc_cred = cred,
6623 };
6624 int status;
6625
6626 res.fh = nfs_alloc_fhandle();
6627 if (res.fh == NULL)
6628 return -ENOMEM;
6629
6630 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6631 nfs4_set_sequence_privileged(&args.seq_args);
6632 status = nfs4_call_sync_sequence(clnt, server, &msg,
6633 &args.seq_args, &res.seq_res);
6634 nfs_free_fhandle(res.fh);
6635 if (status == NFS4_OK &&
6636 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6637 status = -NFS4ERR_LEASE_MOVED;
6638 return status;
6639}
6640
6641#endif /* CONFIG_NFS_V4_1 */
6642
6643/**
6644 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6645 * @inode: inode on FSID to check
6646 * @cred: credential to use for this operation
6647 *
6648 * Server indicates whether the FSID is present, moved, or not
6649 * recognized. This operation is necessary to clear a LEASE_MOVED
6650 * condition for this client ID.
6651 *
6652 * Returns NFS4_OK if the FSID is present on this server,
6653 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6654 * NFS4ERR code if some error occurred on the server, or a
6655 * negative errno if a local failure occurred.
6656 */
6657int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6658{
6659 struct nfs_server *server = NFS_SERVER(inode);
6660 struct nfs_client *clp = server->nfs_client;
6661 const struct nfs4_mig_recovery_ops *ops =
6662 clp->cl_mvops->mig_recovery_ops;
6663 struct nfs4_exception exception = { };
6664 int status;
6665
6666 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6667 (unsigned long long)server->fsid.major,
6668 (unsigned long long)server->fsid.minor,
6669 clp->cl_hostname);
6670 nfs_display_fhandle(NFS_FH(inode), __func__);
6671
6672 do {
6673 status = ops->fsid_present(inode, cred);
6674 if (status != -NFS4ERR_DELAY)
6675 break;
6676 nfs4_handle_exception(server, status, &exception);
6677 } while (exception.retry);
6678 return status;
6679}
6680
Andy Adamson5ec16a82013-08-08 10:57:55 -04006681/**
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006682 * If 'use_integrity' is true and the state managment nfs_client
6683 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6684 * and the machine credential as per RFC3530bis and RFC5661 Security
6685 * Considerations sections. Otherwise, just use the user cred with the
6686 * filesystem's rpc_client.
Andy Adamson5ec16a82013-08-08 10:57:55 -04006687 */
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006688static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006689{
6690 int status;
6691 struct nfs4_secinfo_arg args = {
6692 .dir_fh = NFS_FH(dir),
6693 .name = name,
6694 };
6695 struct nfs4_secinfo_res res = {
6696 .flavors = flavors,
6697 };
6698 struct rpc_message msg = {
6699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6700 .rpc_argp = &args,
6701 .rpc_resp = &res,
6702 };
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006703 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006704 struct rpc_cred *cred = NULL;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006705
6706 if (use_integrity) {
6707 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006708 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6709 msg.rpc_cred = cred;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006710 }
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006711
6712 dprintk("NFS call secinfo %s\n", name->name);
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006713
6714 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6715 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6716
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006717 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6718 &res.seq_res, 0);
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006719 dprintk("NFS reply secinfo: %d\n", status);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006720
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006721 if (cred)
6722 put_rpccred(cred);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006723
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006724 return status;
6725}
6726
Bryan Schumaker72de53e2012-04-27 13:27:40 -04006727int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6728 struct nfs4_secinfo_flavors *flavors)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006729{
6730 struct nfs4_exception exception = { };
6731 int err;
6732 do {
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006733 err = -NFS4ERR_WRONGSEC;
6734
6735 /* try to use integrity protection with machine cred */
6736 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6737 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6738
6739 /*
6740 * if unable to use integrity protection, or SECINFO with
6741 * integrity protection returns NFS4ERR_WRONGSEC (which is
6742 * disallowed by spec, but exists in deployed servers) use
6743 * the current filesystem's rpc_client and the user cred.
6744 */
6745 if (err == -NFS4ERR_WRONGSEC)
6746 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6747
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006748 trace_nfs4_secinfo(dir, name, err);
6749 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006750 &exception);
6751 } while (exception.retry);
6752 return err;
6753}
6754
Andy Adamson557134a2009-04-01 09:21:53 -04006755#ifdef CONFIG_NFS_V4_1
Benny Halevy99fe60d2009-04-01 09:22:29 -04006756/*
Andy Adamson357f54d2010-12-14 10:11:57 -05006757 * Check the exchange flags returned by the server for invalid flags, having
6758 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6759 * DS flags set.
6760 */
6761static int nfs4_check_cl_exchange_flags(u32 flags)
6762{
6763 if (flags & ~EXCHGID4_FLAG_MASK_R)
6764 goto out_inval;
6765 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6766 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6767 goto out_inval;
6768 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6769 goto out_inval;
6770 return NFS_OK;
6771out_inval:
6772 return -NFS4ERR_INVAL;
6773}
6774
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006775static bool
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006776nfs41_same_server_scope(struct nfs41_server_scope *a,
6777 struct nfs41_server_scope *b)
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006778{
6779 if (a->server_scope_sz == b->server_scope_sz &&
6780 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6781 return true;
6782
6783 return false;
6784}
6785
Andy Adamson02a95de2016-02-05 16:08:37 -05006786static void
6787nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6788{
6789}
6790
6791static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6792 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6793};
6794
Andy Adamson357f54d2010-12-14 10:11:57 -05006795/*
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006796 * nfs4_proc_bind_one_conn_to_session()
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006797 *
6798 * The 4.1 client currently uses the same TCP connection for the
6799 * fore and backchannel.
6800 */
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006801static
6802int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6803 struct rpc_xprt *xprt,
6804 struct nfs_client *clp,
6805 struct rpc_cred *cred)
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006806{
6807 int status;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006808 struct nfs41_bind_conn_to_session_args args = {
6809 .client = clp,
6810 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6811 };
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006812 struct nfs41_bind_conn_to_session_res res;
6813 struct rpc_message msg = {
6814 .rpc_proc =
6815 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
Trond Myklebust71a097c2015-02-18 09:27:18 -08006816 .rpc_argp = &args,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006817 .rpc_resp = &res,
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006818 .rpc_cred = cred,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006819 };
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006820 struct rpc_task_setup task_setup_data = {
6821 .rpc_client = clnt,
6822 .rpc_xprt = xprt,
Andy Adamson02a95de2016-02-05 16:08:37 -05006823 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006824 .rpc_message = &msg,
6825 .flags = RPC_TASK_TIMEOUT,
6826 };
6827 struct rpc_task *task;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006828
6829 dprintk("--> %s\n", __func__);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006830
Trond Myklebust71a097c2015-02-18 09:27:18 -08006831 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6832 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6833 args.dir = NFS4_CDFC4_FORE;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006834
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006835 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6836 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6837 args.dir = NFS4_CDFC4_FORE;
6838
6839 task = rpc_run_task(&task_setup_data);
6840 if (!IS_ERR(task)) {
6841 status = task->tk_status;
6842 rpc_put_task(task);
6843 } else
6844 status = PTR_ERR(task);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006845 trace_nfs4_bind_conn_to_session(clp, status);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006846 if (status == 0) {
Trond Myklebust71a097c2015-02-18 09:27:18 -08006847 if (memcmp(res.sessionid.data,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006848 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6849 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6850 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006851 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006852 }
Trond Myklebust71a097c2015-02-18 09:27:18 -08006853 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006854 dprintk("NFS: %s: Unexpected direction from server\n",
6855 __func__);
6856 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006857 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006858 }
Trond Myklebust71a097c2015-02-18 09:27:18 -08006859 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006860 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6861 __func__);
6862 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006863 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006864 }
6865 }
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006866out:
6867 dprintk("<-- %s status= %d\n", __func__, status);
6868 return status;
6869}
6870
Trond Myklebustd9ddbf52016-01-30 22:58:24 -05006871struct rpc_bind_conn_calldata {
6872 struct nfs_client *clp;
6873 struct rpc_cred *cred;
6874};
6875
6876static int
6877nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6878 struct rpc_xprt *xprt,
6879 void *calldata)
6880{
6881 struct rpc_bind_conn_calldata *p = calldata;
6882
6883 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6884}
6885
6886int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6887{
6888 struct rpc_bind_conn_calldata data = {
6889 .clp = clp,
6890 .cred = cred,
6891 };
6892 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6893 nfs4_proc_bind_conn_to_session_callback, &data);
6894}
6895
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006896/*
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006897 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6898 * and operations we'd like to see to enable certain features in the allow map
Benny Halevy99fe60d2009-04-01 09:22:29 -04006899 */
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006900static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6901 .how = SP4_MACH_CRED,
6902 .enforce.u.words = {
6903 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6904 1 << (OP_EXCHANGE_ID - 32) |
6905 1 << (OP_CREATE_SESSION - 32) |
6906 1 << (OP_DESTROY_SESSION - 32) |
6907 1 << (OP_DESTROY_CLIENTID - 32)
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006908 },
6909 .allow.u.words = {
6910 [0] = 1 << (OP_CLOSE) |
Andrew Elble99ade3c2015-12-02 09:39:51 -05006911 1 << (OP_OPEN_DOWNGRADE) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006912 1 << (OP_LOCKU) |
Andrew Elble99ade3c2015-12-02 09:39:51 -05006913 1 << (OP_DELEGRETURN) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006914 1 << (OP_COMMIT),
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006915 [1] = 1 << (OP_SECINFO - 32) |
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006916 1 << (OP_SECINFO_NO_NAME - 32) |
Andrew Elble99ade3c2015-12-02 09:39:51 -05006917 1 << (OP_LAYOUTRETURN - 32) |
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006918 1 << (OP_TEST_STATEID - 32) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006919 1 << (OP_FREE_STATEID - 32) |
6920 1 << (OP_WRITE - 32)
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006921 }
6922};
6923
6924/*
6925 * Select the state protection mode for client `clp' given the server results
6926 * from exchange_id in `sp'.
6927 *
6928 * Returns 0 on success, negative errno otherwise.
6929 */
6930static int nfs4_sp4_select_mode(struct nfs_client *clp,
6931 struct nfs41_state_protection *sp)
6932{
6933 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6934 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6935 1 << (OP_EXCHANGE_ID - 32) |
6936 1 << (OP_CREATE_SESSION - 32) |
6937 1 << (OP_DESTROY_SESSION - 32) |
6938 1 << (OP_DESTROY_CLIENTID - 32)
6939 };
6940 unsigned int i;
6941
6942 if (sp->how == SP4_MACH_CRED) {
6943 /* Print state protect result */
6944 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6945 for (i = 0; i <= LAST_NFS4_OP; i++) {
6946 if (test_bit(i, sp->enforce.u.longs))
6947 dfprintk(MOUNT, " enforce op %d\n", i);
6948 if (test_bit(i, sp->allow.u.longs))
6949 dfprintk(MOUNT, " allow op %d\n", i);
6950 }
6951
6952 /* make sure nothing is on enforce list that isn't supported */
6953 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6954 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6955 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6956 return -EINVAL;
6957 }
6958 }
6959
6960 /*
6961 * Minimal mode - state operations are allowed to use machine
6962 * credential. Note this already happens by default, so the
6963 * client doesn't have to do anything more than the negotiation.
6964 *
6965 * NOTE: we don't care if EXCHANGE_ID is in the list -
6966 * we're already using the machine cred for exchange_id
6967 * and will never use a different cred.
6968 */
6969 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6970 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6971 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6972 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6973 dfprintk(MOUNT, "sp4_mach_cred:\n");
6974 dfprintk(MOUNT, " minimal mode enabled\n");
6975 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6976 } else {
6977 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6978 return -EINVAL;
6979 }
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006980
6981 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
Andrew Elble99ade3c2015-12-02 09:39:51 -05006982 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
6983 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006984 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6985 dfprintk(MOUNT, " cleanup mode enabled\n");
6986 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6987 }
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006988
Andrew Elble99ade3c2015-12-02 09:39:51 -05006989 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
6990 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
6991 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
6992 &clp->cl_sp4_flags);
6993 }
6994
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006995 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6996 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6997 dfprintk(MOUNT, " secinfo mode enabled\n");
6998 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6999 }
Weston Andros Adamson3787d502013-08-13 16:37:36 -04007000
7001 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7002 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7003 dfprintk(MOUNT, " stateid mode enabled\n");
7004 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7005 }
Weston Andros Adamson8c21c622013-08-13 16:37:37 -04007006
7007 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7008 dfprintk(MOUNT, " write mode enabled\n");
7009 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7010 }
7011
7012 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7013 dfprintk(MOUNT, " commit mode enabled\n");
7014 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7015 }
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007016 }
7017
7018 return 0;
7019}
7020
7021/*
7022 * _nfs4_proc_exchange_id()
7023 *
7024 * Wrapper for EXCHANGE_ID operation.
7025 */
7026static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7027 u32 sp4_how)
Benny Halevy99fe60d2009-04-01 09:22:29 -04007028{
7029 nfs4_verifier verifier;
7030 struct nfs41_exchange_id_args args = {
Chuck Levercd937102012-03-02 17:14:31 -05007031 .verifier = &verifier,
Benny Halevy99fe60d2009-04-01 09:22:29 -04007032 .client = clp,
Chuck Levercd3fade2013-10-17 14:14:04 -04007033#ifdef CONFIG_NFS_V4_1_MIGRATION
Trond Myklebust4f0b4292013-05-20 12:24:03 -04007034 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
Chuck Levercd3fade2013-10-17 14:14:04 -04007035 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7036 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7037#else
7038 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7039 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7040#endif
Benny Halevy99fe60d2009-04-01 09:22:29 -04007041 };
7042 struct nfs41_exchange_id_res res = {
Trond Myklebust32b01312012-05-26 13:41:04 -04007043 0
Benny Halevy99fe60d2009-04-01 09:22:29 -04007044 };
7045 int status;
7046 struct rpc_message msg = {
7047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7048 .rpc_argp = &args,
7049 .rpc_resp = &res,
7050 .rpc_cred = cred,
7051 };
Benny Halevy99fe60d2009-04-01 09:22:29 -04007052
Chuck Leverf0920752012-05-21 22:45:41 -04007053 nfs4_init_boot_verifier(clp, &verifier);
Jeff Layton873e3852015-06-09 19:44:00 -04007054
7055 status = nfs4_init_uniform_client_string(clp);
7056 if (status)
Jeff Layton3a6bb732015-06-09 19:43:57 -04007057 goto out;
Jeff Layton3a6bb732015-06-09 19:43:57 -04007058
7059 dprintk("NFS call exchange_id auth=%s, '%s'\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007060 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Jeff Layton3a6bb732015-06-09 19:43:57 -04007061 clp->cl_owner_id);
Benny Halevy99fe60d2009-04-01 09:22:29 -04007062
Chuck Leveracdeb692012-05-21 22:46:16 -04007063 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007064 GFP_NOFS);
Chuck Leveracdeb692012-05-21 22:46:16 -04007065 if (unlikely(res.server_owner == NULL)) {
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007066 status = -ENOMEM;
7067 goto out;
7068 }
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007069
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007070 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007071 GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04007072 if (unlikely(res.server_scope == NULL)) {
Benny Halevy99fe60d2009-04-01 09:22:29 -04007073 status = -ENOMEM;
Chuck Leveracdeb692012-05-21 22:46:16 -04007074 goto out_server_owner;
Benny Halevy99fe60d2009-04-01 09:22:29 -04007075 }
7076
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007077 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04007078 if (unlikely(res.impl_id == NULL)) {
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007079 status = -ENOMEM;
7080 goto out_server_scope;
7081 }
7082
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007083 switch (sp4_how) {
7084 case SP4_NONE:
7085 args.state_protect.how = SP4_NONE;
7086 break;
7087
7088 case SP4_MACH_CRED:
7089 args.state_protect = nfs4_sp4_mach_cred_request;
7090 break;
7091
7092 default:
7093 /* unsupported! */
7094 WARN_ON_ONCE(1);
7095 status = -EINVAL;
Kinglong Mee6b559702015-07-01 11:54:53 +08007096 goto out_impl_id;
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007097 }
7098
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007099 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007100 trace_nfs4_exchange_id(clp, status);
Chuck Lever177313f2012-05-21 22:44:58 -04007101 if (status == 0)
Trond Myklebust32b01312012-05-26 13:41:04 -04007102 status = nfs4_check_cl_exchange_flags(res.flags);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007103
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007104 if (status == 0)
7105 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7106
Chuck Lever177313f2012-05-21 22:44:58 -04007107 if (status == 0) {
Trond Myklebust32b01312012-05-26 13:41:04 -04007108 clp->cl_clientid = res.clientid;
Trond Myklebuste11259f2015-03-03 20:35:31 -05007109 clp->cl_exchange_flags = res.flags;
7110 /* Client ID is not confirmed */
7111 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7112 clear_bit(NFS4_SESSION_ESTABLISHED,
7113 &clp->cl_session->session_state);
Trond Myklebust32b01312012-05-26 13:41:04 -04007114 clp->cl_seqid = res.seqid;
Trond Myklebuste11259f2015-03-03 20:35:31 -05007115 }
Trond Myklebust32b01312012-05-26 13:41:04 -04007116
Chuck Leveracdeb692012-05-21 22:46:16 -04007117 kfree(clp->cl_serverowner);
7118 clp->cl_serverowner = res.server_owner;
7119 res.server_owner = NULL;
Chuck Leveracdeb692012-05-21 22:46:16 -04007120
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007121 /* use the most recent implementation id */
Chuck Lever59155542012-05-21 22:44:41 -04007122 kfree(clp->cl_implid);
7123 clp->cl_implid = res.impl_id;
Kinglong Mee6b559702015-07-01 11:54:53 +08007124 res.impl_id = NULL;
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007125
Chuck Lever177313f2012-05-21 22:44:58 -04007126 if (clp->cl_serverscope != NULL &&
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007127 !nfs41_same_server_scope(clp->cl_serverscope,
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007128 res.server_scope)) {
7129 dprintk("%s: server_scope mismatch detected\n",
7130 __func__);
7131 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007132 kfree(clp->cl_serverscope);
7133 clp->cl_serverscope = NULL;
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007134 }
7135
Chuck Lever177313f2012-05-21 22:44:58 -04007136 if (clp->cl_serverscope == NULL) {
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007137 clp->cl_serverscope = res.server_scope;
Kinglong Mee6b559702015-07-01 11:54:53 +08007138 res.server_scope = NULL;
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007139 }
Kinglong Mee6b559702015-07-01 11:54:53 +08007140 }
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007141
Kinglong Mee6b559702015-07-01 11:54:53 +08007142out_impl_id:
7143 kfree(res.impl_id);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007144out_server_scope:
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007145 kfree(res.server_scope);
Kinglong Mee6b559702015-07-01 11:54:53 +08007146out_server_owner:
7147 kfree(res.server_owner);
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007148out:
Chuck Lever177313f2012-05-21 22:44:58 -04007149 if (clp->cl_implid != NULL)
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007150 dprintk("NFS reply exchange_id: Server Implementation ID: "
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007151 "domain: %s, name: %s, date: %llu,%u\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007152 clp->cl_implid->domain, clp->cl_implid->name,
Chuck Lever59155542012-05-21 22:44:41 -04007153 clp->cl_implid->date.seconds,
7154 clp->cl_implid->date.nseconds);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007155 dprintk("NFS reply exchange_id: %d\n", status);
Benny Halevy99fe60d2009-04-01 09:22:29 -04007156 return status;
7157}
7158
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007159/*
7160 * nfs4_proc_exchange_id()
7161 *
7162 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7163 *
7164 * Since the clientid has expired, all compounds using sessions
7165 * associated with the stale clientid will be returning
7166 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7167 * be in some phase of session reset.
7168 *
7169 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7170 */
7171int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7172{
7173 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7174 int status;
7175
7176 /* try SP4_MACH_CRED if krb5i/p */
7177 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7178 authflavor == RPC_AUTH_GSS_KRB5P) {
7179 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7180 if (!status)
7181 return 0;
7182 }
7183
7184 /* try SP4_NONE */
7185 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7186}
7187
Trond Myklebust66245532012-05-25 17:18:09 -04007188static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7189 struct rpc_cred *cred)
7190{
7191 struct rpc_message msg = {
7192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7193 .rpc_argp = clp,
7194 .rpc_cred = cred,
7195 };
7196 int status;
7197
7198 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007199 trace_nfs4_destroy_clientid(clp, status);
Trond Myklebust66245532012-05-25 17:18:09 -04007200 if (status)
Trond Myklebust02c67522012-06-07 13:45:53 -04007201 dprintk("NFS: Got error %d from the server %s on "
Trond Myklebust66245532012-05-25 17:18:09 -04007202 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7203 return status;
7204}
7205
7206static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7207 struct rpc_cred *cred)
7208{
7209 unsigned int loop;
7210 int ret;
7211
7212 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7213 ret = _nfs4_proc_destroy_clientid(clp, cred);
7214 switch (ret) {
7215 case -NFS4ERR_DELAY:
7216 case -NFS4ERR_CLIENTID_BUSY:
7217 ssleep(1);
7218 break;
7219 default:
7220 return ret;
7221 }
7222 }
7223 return 0;
7224}
7225
7226int nfs4_destroy_clientid(struct nfs_client *clp)
7227{
7228 struct rpc_cred *cred;
7229 int ret = 0;
7230
7231 if (clp->cl_mvops->minor_version < 1)
7232 goto out;
7233 if (clp->cl_exchange_flags == 0)
7234 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -04007235 if (clp->cl_preserve_clid)
7236 goto out;
Chuck Lever73d8bde2013-07-24 12:28:37 -04007237 cred = nfs4_get_clid_cred(clp);
Trond Myklebust66245532012-05-25 17:18:09 -04007238 ret = nfs4_proc_destroy_clientid(clp, cred);
7239 if (cred)
7240 put_rpccred(cred);
7241 switch (ret) {
7242 case 0:
7243 case -NFS4ERR_STALE_CLIENTID:
7244 clp->cl_exchange_flags = 0;
7245 }
7246out:
7247 return ret;
7248}
7249
Andy Adamson2050f0c2009-04-01 09:22:30 -04007250struct nfs4_get_lease_time_data {
7251 struct nfs4_get_lease_time_args *args;
7252 struct nfs4_get_lease_time_res *res;
7253 struct nfs_client *clp;
7254};
7255
7256static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7257 void *calldata)
7258{
Andy Adamson2050f0c2009-04-01 09:22:30 -04007259 struct nfs4_get_lease_time_data *data =
7260 (struct nfs4_get_lease_time_data *)calldata;
7261
7262 dprintk("--> %s\n", __func__);
7263 /* just setup sequence, do not trigger session recovery
7264 since we're invoked within one */
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007265 nfs41_setup_sequence(data->clp->cl_session,
7266 &data->args->la_seq_args,
7267 &data->res->lr_seq_res,
7268 task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007269 dprintk("<-- %s\n", __func__);
7270}
7271
7272/*
7273 * Called from nfs4_state_manager thread for session setup, so don't recover
7274 * from sequence operation or clientid errors.
7275 */
7276static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7277{
7278 struct nfs4_get_lease_time_data *data =
7279 (struct nfs4_get_lease_time_data *)calldata;
7280
7281 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007282 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7283 return;
Andy Adamson2050f0c2009-04-01 09:22:30 -04007284 switch (task->tk_status) {
7285 case -NFS4ERR_DELAY:
7286 case -NFS4ERR_GRACE:
7287 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7288 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7289 task->tk_status = 0;
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007290 /* fall through */
7291 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustd00c5d42011-10-19 12:17:29 -07007292 rpc_restart_call_prepare(task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007293 return;
7294 }
Andy Adamson2050f0c2009-04-01 09:22:30 -04007295 dprintk("<-- %s\n", __func__);
7296}
7297
Trond Myklebust17280172012-03-11 13:11:00 -04007298static const struct rpc_call_ops nfs4_get_lease_time_ops = {
Andy Adamson2050f0c2009-04-01 09:22:30 -04007299 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7300 .rpc_call_done = nfs4_get_lease_time_done,
7301};
7302
7303int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7304{
7305 struct rpc_task *task;
7306 struct nfs4_get_lease_time_args args;
7307 struct nfs4_get_lease_time_res res = {
7308 .lr_fsinfo = fsinfo,
7309 };
7310 struct nfs4_get_lease_time_data data = {
7311 .args = &args,
7312 .res = &res,
7313 .clp = clp,
7314 };
7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7317 .rpc_argp = &args,
7318 .rpc_resp = &res,
7319 };
7320 struct rpc_task_setup task_setup = {
7321 .rpc_client = clp->cl_rpcclient,
7322 .rpc_message = &msg,
7323 .callback_ops = &nfs4_get_lease_time_ops,
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007324 .callback_data = &data,
7325 .flags = RPC_TASK_TIMEOUT,
Andy Adamson2050f0c2009-04-01 09:22:30 -04007326 };
7327 int status;
7328
Chuck Levera9c92d62013-08-09 12:48:18 -04007329 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007330 nfs4_set_sequence_privileged(&args.la_seq_args);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007331 dprintk("--> %s\n", __func__);
7332 task = rpc_run_task(&task_setup);
7333
7334 if (IS_ERR(task))
7335 status = PTR_ERR(task);
7336 else {
7337 status = task->tk_status;
7338 rpc_put_task(task);
7339 }
7340 dprintk("<-- %s return %d\n", __func__, status);
7341
7342 return status;
7343}
7344
Andy Adamsonfc931582009-04-01 09:22:31 -04007345/*
7346 * Initialize the values to be used by the client in CREATE_SESSION
7347 * If nfs4_init_session set the fore channel request and response sizes,
7348 * use them.
7349 *
7350 * Set the back channel max_resp_sz_cached to zero to force the client to
7351 * always set csa_cachethis to FALSE because the current implementation
7352 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7353 */
7354static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7355{
Andy Adamson18aad3d2013-06-26 12:21:49 -04007356 unsigned int max_rqst_sz, max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007357
Andy Adamson18aad3d2013-06-26 12:21:49 -04007358 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7359 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7360
Andy Adamsonfc931582009-04-01 09:22:31 -04007361 /* Fore channel attributes */
Andy Adamson18aad3d2013-06-26 12:21:49 -04007362 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7363 args->fc_attrs.max_resp_sz = max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007364 args->fc_attrs.max_ops = NFS4_MAX_OPS;
Trond Myklebustef159e92012-02-06 19:50:40 -05007365 args->fc_attrs.max_reqs = max_session_slots;
Andy Adamsonfc931582009-04-01 09:22:31 -04007366
7367 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
Mike Sager8e0d46e2009-12-17 12:06:26 -05007368 "max_ops=%u max_reqs=%u\n",
Andy Adamsonfc931582009-04-01 09:22:31 -04007369 __func__,
7370 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
Mike Sager8e0d46e2009-12-17 12:06:26 -05007371 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
Andy Adamsonfc931582009-04-01 09:22:31 -04007372
7373 /* Back channel attributes */
Andy Adamsonfc931582009-04-01 09:22:31 -04007374 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7375 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7376 args->bc_attrs.max_resp_sz_cached = 0;
7377 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
Trond Myklebustf4f58ed2016-01-23 14:12:52 -05007378 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
Andy Adamsonfc931582009-04-01 09:22:31 -04007379
7380 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7381 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7382 __func__,
7383 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7384 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7385 args->bc_attrs.max_reqs);
7386}
7387
Trond Myklebust79969dd2015-02-18 11:30:18 -08007388static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7389 struct nfs41_create_session_res *res)
Andy Adamson8d353012009-04-01 09:22:32 -04007390{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007391 struct nfs4_channel_attrs *sent = &args->fc_attrs;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007392 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007393
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007394 if (rcvd->max_resp_sz > sent->max_resp_sz)
7395 return -EINVAL;
7396 /*
7397 * Our requested max_ops is the minimum we need; we're not
7398 * prepared to break up compounds into smaller pieces than that.
7399 * So, no point even trying to continue if the server won't
7400 * cooperate:
7401 */
7402 if (rcvd->max_ops < sent->max_ops)
7403 return -EINVAL;
7404 if (rcvd->max_reqs == 0)
7405 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007406 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7407 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007408 return 0;
Andy Adamson8d353012009-04-01 09:22:32 -04007409}
7410
Trond Myklebust79969dd2015-02-18 11:30:18 -08007411static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7412 struct nfs41_create_session_res *res)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007413{
7414 struct nfs4_channel_attrs *sent = &args->bc_attrs;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007415 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
Andy Adamson8d353012009-04-01 09:22:32 -04007416
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007417 if (!(res->flags & SESSION4_BACK_CHAN))
7418 goto out;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007419 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7420 return -EINVAL;
7421 if (rcvd->max_resp_sz < sent->max_resp_sz)
7422 return -EINVAL;
7423 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7424 return -EINVAL;
7425 /* These would render the backchannel useless: */
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007426 if (rcvd->max_ops != sent->max_ops)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007427 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007428 if (rcvd->max_reqs != sent->max_reqs)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007429 return -EINVAL;
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007430out:
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007431 return 0;
7432}
Andy Adamson8d353012009-04-01 09:22:32 -04007433
Andy Adamson8d353012009-04-01 09:22:32 -04007434static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
Trond Myklebust79969dd2015-02-18 11:30:18 -08007435 struct nfs41_create_session_res *res)
Andy Adamson8d353012009-04-01 09:22:32 -04007436{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007437 int ret;
Andy Adamson8d353012009-04-01 09:22:32 -04007438
Trond Myklebust79969dd2015-02-18 11:30:18 -08007439 ret = nfs4_verify_fore_channel_attrs(args, res);
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007440 if (ret)
7441 return ret;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007442 return nfs4_verify_back_channel_attrs(args, res);
7443}
7444
7445static void nfs4_update_session(struct nfs4_session *session,
7446 struct nfs41_create_session_res *res)
7447{
7448 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
Trond Myklebuste11259f2015-03-03 20:35:31 -05007449 /* Mark client id and session as being confirmed */
7450 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7451 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
Trond Myklebust79969dd2015-02-18 11:30:18 -08007452 session->flags = res->flags;
7453 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007454 if (res->flags & SESSION4_BACK_CHAN)
7455 memcpy(&session->bc_attrs, &res->bc_attrs,
7456 sizeof(session->bc_attrs));
Andy Adamson8d353012009-04-01 09:22:32 -04007457}
7458
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007459static int _nfs4_proc_create_session(struct nfs_client *clp,
7460 struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007461{
7462 struct nfs4_session *session = clp->cl_session;
7463 struct nfs41_create_session_args args = {
7464 .client = clp,
Trond Myklebust79969dd2015-02-18 11:30:18 -08007465 .clientid = clp->cl_clientid,
7466 .seqid = clp->cl_seqid,
Andy Adamsonfc931582009-04-01 09:22:31 -04007467 .cb_program = NFS4_CALLBACK,
7468 };
Trond Myklebust79969dd2015-02-18 11:30:18 -08007469 struct nfs41_create_session_res res;
7470
Andy Adamsonfc931582009-04-01 09:22:31 -04007471 struct rpc_message msg = {
7472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7473 .rpc_argp = &args,
7474 .rpc_resp = &res,
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007475 .rpc_cred = cred,
Andy Adamsonfc931582009-04-01 09:22:31 -04007476 };
7477 int status;
7478
7479 nfs4_init_channel_attrs(&args);
Andy Adamson0f914212009-04-01 09:23:16 -04007480 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
Andy Adamsonfc931582009-04-01 09:22:31 -04007481
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007482 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007483 trace_nfs4_create_session(clp, status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007484
Trond Myklebust43095d32012-11-20 11:13:12 -05007485 if (!status) {
Andy Adamson8d353012009-04-01 09:22:32 -04007486 /* Verify the session's negotiated channel_attrs values */
Trond Myklebust79969dd2015-02-18 11:30:18 -08007487 status = nfs4_verify_channel_attrs(&args, &res);
Andy Adamsonfc931582009-04-01 09:22:31 -04007488 /* Increment the clientid slot sequence id */
Trond Myklebust79969dd2015-02-18 11:30:18 -08007489 if (clp->cl_seqid == res.seqid)
7490 clp->cl_seqid++;
7491 if (status)
7492 goto out;
7493 nfs4_update_session(session, &res);
Andy Adamsonfc931582009-04-01 09:22:31 -04007494 }
Trond Myklebust79969dd2015-02-18 11:30:18 -08007495out:
Andy Adamsonfc931582009-04-01 09:22:31 -04007496 return status;
7497}
7498
7499/*
7500 * Issues a CREATE_SESSION operation to the server.
7501 * It is the responsibility of the caller to verify the session is
7502 * expired before calling this routine.
7503 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007504int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007505{
7506 int status;
7507 unsigned *ptr;
Andy Adamsonfc931582009-04-01 09:22:31 -04007508 struct nfs4_session *session = clp->cl_session;
7509
7510 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7511
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007512 status = _nfs4_proc_create_session(clp, cred);
Andy Adamsonfc931582009-04-01 09:22:31 -04007513 if (status)
7514 goto out;
7515
Andy Adamsonaacd5532011-11-09 13:58:21 -05007516 /* Init or reset the session slot tables */
7517 status = nfs4_setup_session_slot_tables(session);
7518 dprintk("slot table setup returned %d\n", status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007519 if (status)
7520 goto out;
7521
7522 ptr = (unsigned *)&session->sess_id.data[0];
7523 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7524 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
Andy Adamsonfc931582009-04-01 09:22:31 -04007525out:
7526 dprintk("<-- %s\n", __func__);
7527 return status;
7528}
7529
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007530/*
7531 * Issue the over-the-wire RPC DESTROY_SESSION.
7532 * The caller must serialize access to this routine.
7533 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007534int nfs4_proc_destroy_session(struct nfs4_session *session,
7535 struct rpc_cred *cred)
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007536{
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007537 struct rpc_message msg = {
7538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7539 .rpc_argp = session,
7540 .rpc_cred = cred,
7541 };
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007542 int status = 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007543
7544 dprintk("--> nfs4_proc_destroy_session\n");
7545
7546 /* session is still being setup */
Trond Myklebuste11259f2015-03-03 20:35:31 -05007547 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7548 return 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007549
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007550 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007551 trace_nfs4_destroy_session(session->clp, status);
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007552
7553 if (status)
Trond Myklebust08106ac2012-06-05 10:08:24 -04007554 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007555 "Session has been destroyed regardless...\n", status);
7556
7557 dprintk("<-- nfs4_proc_destroy_session\n");
7558 return status;
7559}
7560
Trond Myklebust7b38c362012-05-23 13:23:31 -04007561/*
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007562 * Renew the cl_session lease.
7563 */
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007564struct nfs4_sequence_data {
7565 struct nfs_client *clp;
7566 struct nfs4_sequence_args args;
7567 struct nfs4_sequence_res res;
7568};
7569
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007570static void nfs41_sequence_release(void *data)
7571{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007572 struct nfs4_sequence_data *calldata = data;
7573 struct nfs_client *clp = calldata->clp;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007574
Alexandros Batsakis71358402010-02-05 03:45:05 -08007575 if (atomic_read(&clp->cl_count) > 1)
7576 nfs4_schedule_state_renewal(clp);
7577 nfs_put_client(clp);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007578 kfree(calldata);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007579}
7580
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007581static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7582{
7583 switch(task->tk_status) {
7584 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007585 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7586 return -EAGAIN;
7587 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007588 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007589 }
7590 return 0;
7591}
7592
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007593static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007594{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007595 struct nfs4_sequence_data *calldata = data;
7596 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007597
Trond Myklebust14516c32010-07-31 14:29:06 -04007598 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7599 return;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007600
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007601 trace_nfs4_sequence(clp, task->tk_status);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007602 if (task->tk_status < 0) {
7603 dprintk("%s ERROR %d\n", __func__, task->tk_status);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007604 if (atomic_read(&clp->cl_count) == 1)
7605 goto out;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007606
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007607 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7608 rpc_restart_call_prepare(task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007609 return;
7610 }
7611 }
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007612 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007613out:
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007614 dprintk("<-- %s\n", __func__);
7615}
7616
7617static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7618{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007619 struct nfs4_sequence_data *calldata = data;
7620 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007621 struct nfs4_sequence_args *args;
7622 struct nfs4_sequence_res *res;
7623
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007624 args = task->tk_msg.rpc_argp;
7625 res = task->tk_msg.rpc_resp;
7626
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007627 nfs41_setup_sequence(clp->cl_session, args, res, task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007628}
7629
7630static const struct rpc_call_ops nfs41_sequence_ops = {
7631 .rpc_call_done = nfs41_sequence_call_done,
7632 .rpc_call_prepare = nfs41_sequence_prepare,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007633 .rpc_release = nfs41_sequence_release,
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007634};
7635
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007636static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7637 struct rpc_cred *cred,
7638 bool is_privileged)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007639{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007640 struct nfs4_sequence_data *calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007641 struct rpc_message msg = {
7642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7643 .rpc_cred = cred,
7644 };
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007645 struct rpc_task_setup task_setup_data = {
7646 .rpc_client = clp->cl_rpcclient,
7647 .rpc_message = &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007648 .callback_ops = &nfs41_sequence_ops,
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04007649 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007650 };
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007651
Alexandros Batsakis71358402010-02-05 03:45:05 -08007652 if (!atomic_inc_not_zero(&clp->cl_count))
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007653 return ERR_PTR(-EIO);
Benny Halevydfb4f3092010-09-24 09:17:01 -04007654 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007655 if (calldata == NULL) {
Alexandros Batsakis71358402010-02-05 03:45:05 -08007656 nfs_put_client(clp);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007657 return ERR_PTR(-ENOMEM);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007658 }
Chuck Levera9c92d62013-08-09 12:48:18 -04007659 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007660 if (is_privileged)
7661 nfs4_set_sequence_privileged(&calldata->args);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007662 msg.rpc_argp = &calldata->args;
7663 msg.rpc_resp = &calldata->res;
7664 calldata->clp = clp;
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007665 task_setup_data.callback_data = calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007666
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007667 return rpc_run_task(&task_setup_data);
7668}
7669
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007670static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007671{
7672 struct rpc_task *task;
7673 int ret = 0;
7674
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007675 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
Andy Adamsond1f456b2014-09-29 12:31:57 -04007676 return -EAGAIN;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007677 task = _nfs41_proc_sequence(clp, cred, false);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007678 if (IS_ERR(task))
7679 ret = PTR_ERR(task);
7680 else
Trond Myklebustbf294b42011-02-21 11:05:41 -08007681 rpc_put_task_async(task);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007682 dprintk("<-- %s status=%d\n", __func__, ret);
7683 return ret;
7684}
7685
7686static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7687{
7688 struct rpc_task *task;
7689 int ret;
7690
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007691 task = _nfs41_proc_sequence(clp, cred, true);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007692 if (IS_ERR(task)) {
7693 ret = PTR_ERR(task);
7694 goto out;
7695 }
7696 ret = rpc_wait_for_completion_task(task);
Trond Myklebustbe824162015-07-05 14:50:46 -04007697 if (!ret)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007698 ret = task->tk_status;
7699 rpc_put_task(task);
7700out:
7701 dprintk("<-- %s status=%d\n", __func__, ret);
7702 return ret;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007703}
7704
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007705struct nfs4_reclaim_complete_data {
7706 struct nfs_client *clp;
7707 struct nfs41_reclaim_complete_args arg;
7708 struct nfs41_reclaim_complete_res res;
7709};
7710
7711static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7712{
7713 struct nfs4_reclaim_complete_data *calldata = data;
7714
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007715 nfs41_setup_sequence(calldata->clp->cl_session,
7716 &calldata->arg.seq_args,
7717 &calldata->res.seq_res,
7718 task);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007719}
7720
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007721static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7722{
7723 switch(task->tk_status) {
7724 case 0:
7725 case -NFS4ERR_COMPLETE_ALREADY:
7726 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7727 break;
7728 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007729 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007730 /* fall through */
7731 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007732 return -EAGAIN;
7733 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007734 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007735 }
7736 return 0;
7737}
7738
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007739static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7740{
7741 struct nfs4_reclaim_complete_data *calldata = data;
7742 struct nfs_client *clp = calldata->clp;
7743 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7744
7745 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007746 if (!nfs41_sequence_done(task, res))
7747 return;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007748
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007749 trace_nfs4_reclaim_complete(clp, task->tk_status);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007750 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7751 rpc_restart_call_prepare(task);
7752 return;
7753 }
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007754 dprintk("<-- %s\n", __func__);
7755}
7756
7757static void nfs4_free_reclaim_complete_data(void *data)
7758{
7759 struct nfs4_reclaim_complete_data *calldata = data;
7760
7761 kfree(calldata);
7762}
7763
7764static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7765 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7766 .rpc_call_done = nfs4_reclaim_complete_done,
7767 .rpc_release = nfs4_free_reclaim_complete_data,
7768};
7769
7770/*
7771 * Issue a global reclaim complete.
7772 */
Trond Myklebust965e9c22013-05-20 11:05:17 -04007773static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7774 struct rpc_cred *cred)
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007775{
7776 struct nfs4_reclaim_complete_data *calldata;
7777 struct rpc_task *task;
7778 struct rpc_message msg = {
7779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
Trond Myklebust965e9c22013-05-20 11:05:17 -04007780 .rpc_cred = cred,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007781 };
7782 struct rpc_task_setup task_setup_data = {
7783 .rpc_client = clp->cl_rpcclient,
7784 .rpc_message = &msg,
7785 .callback_ops = &nfs4_reclaim_complete_call_ops,
7786 .flags = RPC_TASK_ASYNC,
7787 };
7788 int status = -ENOMEM;
7789
7790 dprintk("--> %s\n", __func__);
Trond Myklebust8535b2b2010-05-13 12:51:01 -04007791 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007792 if (calldata == NULL)
7793 goto out;
7794 calldata->clp = clp;
7795 calldata->arg.one_fs = 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007796
Chuck Levera9c92d62013-08-09 12:48:18 -04007797 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007798 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007799 msg.rpc_argp = &calldata->arg;
7800 msg.rpc_resp = &calldata->res;
7801 task_setup_data.callback_data = calldata;
7802 task = rpc_run_task(&task_setup_data);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007803 if (IS_ERR(task)) {
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007804 status = PTR_ERR(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007805 goto out;
7806 }
Andy Adamsonc34c32e2011-03-09 13:13:46 -05007807 status = nfs4_wait_for_completion_rpc_task(task);
7808 if (status == 0)
7809 status = task->tk_status;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007810 rpc_put_task(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007811 return 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007812out:
7813 dprintk("<-- %s status=%d\n", __func__, status);
7814 return status;
7815}
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007816
7817static void
7818nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7819{
7820 struct nfs4_layoutget *lgp = calldata;
Fred Isamanc31663d2011-01-06 11:36:24 +00007821 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007822 struct nfs4_session *session = nfs4_get_session(server);
Trond Myklebustab7d7632015-12-28 10:32:11 -05007823 int ret;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007824
7825 dprintk("--> %s\n", __func__);
Fred Isamanc31663d2011-01-06 11:36:24 +00007826 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7827 * right now covering the LAYOUTGET we are about to send.
7828 * However, that is not so catastrophic, and there seems
7829 * to be no way to prevent it completely.
7830 */
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007831 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
Trond Myklebust9d12b212012-01-17 22:04:25 -05007832 &lgp->res.seq_res, task))
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007833 return;
Trond Myklebustab7d7632015-12-28 10:32:11 -05007834 ret = pnfs_choose_layoutget_stateid(&lgp->args.stateid,
Fred Isamancf7d63f2011-01-06 11:36:25 +00007835 NFS_I(lgp->args.inode)->layout,
Peng Taoce6ab4f2014-09-06 00:53:24 +08007836 &lgp->args.range,
Trond Myklebustab7d7632015-12-28 10:32:11 -05007837 lgp->args.ctx->state);
7838 if (ret < 0)
7839 rpc_exit(task, ret);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007840}
7841
7842static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7843{
7844 struct nfs4_layoutget *lgp = calldata;
Trond Myklebustee314c22012-10-01 17:25:48 -07007845 struct inode *inode = lgp->args.inode;
7846 struct nfs_server *server = NFS_SERVER(inode);
7847 struct pnfs_layout_hdr *lo;
7848 struct nfs4_state *state = NULL;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007849 unsigned long timeo, now, giveup;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007850
Boaz Harroshed7e5422014-01-22 20:34:54 +02007851 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007852
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007853 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
Trond Myklebustee314c22012-10-01 17:25:48 -07007854 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007855
7856 switch (task->tk_status) {
7857 case 0:
Trond Myklebustee314c22012-10-01 17:25:48 -07007858 goto out;
Peng Tao7c1e6e52015-12-05 17:01:01 +08007859
7860 /*
7861 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7862 * on the file. set tk_status to -ENODATA to tell upper layer to
7863 * retry go inband.
7864 */
7865 case -NFS4ERR_LAYOUTUNAVAILABLE:
7866 task->tk_status = -ENODATA;
7867 goto out;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007868 /*
Trond Myklebust21b874c2015-08-31 01:19:22 -07007869 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7870 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7871 */
7872 case -NFS4ERR_BADLAYOUT:
7873 goto out_overflow;
7874 /*
Boaz Harroshed7e5422014-01-22 20:34:54 +02007875 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
Trond Myklebust21b874c2015-08-31 01:19:22 -07007876 * (or clients) writing to the same RAID stripe except when
7877 * the minlength argument is 0 (see RFC5661 section 18.43.3).
Boaz Harroshed7e5422014-01-22 20:34:54 +02007878 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007879 case -NFS4ERR_LAYOUTTRYLATER:
Trond Myklebust21b874c2015-08-31 01:19:22 -07007880 if (lgp->args.minlength == 0)
7881 goto out_overflow;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007882 /*
7883 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7884 * existing layout before getting a new one).
7885 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007886 case -NFS4ERR_RECALLCONFLICT:
Weston Andros Adamson30005122013-02-28 20:30:10 -05007887 timeo = rpc_get_timeout(task->tk_client);
7888 giveup = lgp->args.timestamp + timeo;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007889 now = jiffies;
7890 if (time_after(giveup, now)) {
7891 unsigned long delay;
7892
7893 /* Delay for:
7894 * - Not less then NFS4_POLL_RETRY_MIN.
7895 * - One last time a jiffie before we give up
7896 * - exponential backoff (time_now minus start_attempt)
7897 */
7898 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7899 min((giveup - now - 1),
7900 now - lgp->args.timestamp));
7901
7902 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7903 __func__, delay);
7904 rpc_delay(task, delay);
Trond Myklebust2259f962015-09-20 13:30:30 -04007905 /* Do not call nfs4_async_handle_error() */
7906 goto out_restart;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007907 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007908 break;
7909 case -NFS4ERR_EXPIRED:
7910 case -NFS4ERR_BAD_STATEID:
7911 spin_lock(&inode->i_lock);
Trond Myklebust2259f962015-09-20 13:30:30 -04007912 if (nfs4_stateid_match(&lgp->args.stateid,
7913 &lgp->args.ctx->state->stateid)) {
Trond Myklebustee314c22012-10-01 17:25:48 -07007914 spin_unlock(&inode->i_lock);
7915 /* If the open stateid was bad, then recover it. */
7916 state = lgp->args.ctx->state;
Trond Myklebust2259f962015-09-20 13:30:30 -04007917 break;
7918 }
7919 lo = NFS_I(inode)->layout;
7920 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7921 &lo->plh_stateid)) {
Trond Myklebustee314c22012-10-01 17:25:48 -07007922 LIST_HEAD(head);
7923
Christoph Hellwigdefb8462014-08-21 11:09:21 -05007924 /*
7925 * Mark the bad layout state as invalid, then retry
7926 * with the current stateid.
7927 */
Kinglong Mee8714d462015-09-20 23:04:22 +08007928 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
Trond Myklebustee314c22012-10-01 17:25:48 -07007929 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7930 spin_unlock(&inode->i_lock);
Trond Myklebustee314c22012-10-01 17:25:48 -07007931 pnfs_free_lseg_list(&head);
Trond Myklebust2259f962015-09-20 13:30:30 -04007932 } else
7933 spin_unlock(&inode->i_lock);
7934 goto out_restart;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007935 }
Jeff Layton91ab4b42015-11-19 14:30:26 -05007936 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
Trond Myklebust2259f962015-09-20 13:30:30 -04007937 goto out_restart;
Trond Myklebustee314c22012-10-01 17:25:48 -07007938out:
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007939 dprintk("<-- %s\n", __func__);
Trond Myklebust21b874c2015-08-31 01:19:22 -07007940 return;
Trond Myklebust2259f962015-09-20 13:30:30 -04007941out_restart:
7942 task->tk_status = 0;
7943 rpc_restart_call_prepare(task);
7944 return;
Trond Myklebust21b874c2015-08-31 01:19:22 -07007945out_overflow:
7946 task->tk_status = -EOVERFLOW;
7947 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007948}
7949
Idan Kedar85541162012-08-02 11:47:10 +03007950static size_t max_response_pages(struct nfs_server *server)
7951{
7952 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7953 return nfs_page_array_len(0, max_resp_sz);
7954}
7955
7956static void nfs4_free_pages(struct page **pages, size_t size)
7957{
7958 int i;
7959
7960 if (!pages)
7961 return;
7962
7963 for (i = 0; i < size; i++) {
7964 if (!pages[i])
7965 break;
7966 __free_page(pages[i]);
7967 }
7968 kfree(pages);
7969}
7970
7971static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7972{
7973 struct page **pages;
7974 int i;
7975
7976 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7977 if (!pages) {
7978 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7979 return NULL;
7980 }
7981
7982 for (i = 0; i < size; i++) {
7983 pages[i] = alloc_page(gfp_flags);
7984 if (!pages[i]) {
7985 dprintk("%s: failed to allocate page\n", __func__);
7986 nfs4_free_pages(pages, size);
7987 return NULL;
7988 }
7989 }
7990
7991 return pages;
7992}
7993
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007994static void nfs4_layoutget_release(void *calldata)
7995{
7996 struct nfs4_layoutget *lgp = calldata;
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007997 struct inode *inode = lgp->args.inode;
7998 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007999 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008000
8001 dprintk("--> %s\n", __func__);
Idan Kedar85541162012-08-02 11:47:10 +03008002 nfs4_free_pages(lgp->args.layout.pages, max_pages);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05008003 pnfs_put_layout_hdr(NFS_I(inode)->layout);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008004 put_nfs_open_context(lgp->args.ctx);
8005 kfree(calldata);
8006 dprintk("<-- %s\n", __func__);
8007}
8008
8009static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8010 .rpc_call_prepare = nfs4_layoutget_prepare,
8011 .rpc_call_done = nfs4_layoutget_done,
8012 .rpc_release = nfs4_layoutget_release,
8013};
8014
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008015struct pnfs_layout_segment *
8016nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008017{
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05008018 struct inode *inode = lgp->args.inode;
8019 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03008020 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008021 struct rpc_task *task;
8022 struct rpc_message msg = {
8023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8024 .rpc_argp = &lgp->args,
8025 .rpc_resp = &lgp->res,
Trond Myklebust6ab59342013-05-20 10:49:34 -04008026 .rpc_cred = lgp->cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008027 };
8028 struct rpc_task_setup task_setup_data = {
8029 .rpc_client = server->client,
8030 .rpc_message = &msg,
8031 .callback_ops = &nfs4_layoutget_call_ops,
8032 .callback_data = lgp,
8033 .flags = RPC_TASK_ASYNC,
8034 };
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008035 struct pnfs_layout_segment *lseg = NULL;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008036 int status = 0;
8037
8038 dprintk("--> %s\n", __func__);
8039
Peng Tao4bd5a982014-11-17 11:05:17 +08008040 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8041 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8042
Idan Kedar85541162012-08-02 11:47:10 +03008043 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8044 if (!lgp->args.layout.pages) {
8045 nfs4_layoutget_release(lgp);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008046 return ERR_PTR(-ENOMEM);
Idan Kedar85541162012-08-02 11:47:10 +03008047 }
8048 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
Weston Andros Adamson30005122013-02-28 20:30:10 -05008049 lgp->args.timestamp = jiffies;
Idan Kedar85541162012-08-02 11:47:10 +03008050
Weston Andros Adamson35124a02011-03-24 16:48:21 -04008051 lgp->res.layoutp = &lgp->args.layout;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008052 lgp->res.seq_res.sr_slot = NULL;
Chuck Levera9c92d62013-08-09 12:48:18 -04008053 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05008054
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008055 task = rpc_run_task(&task_setup_data);
8056 if (IS_ERR(task))
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008057 return ERR_CAST(task);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008058 status = nfs4_wait_for_completion_rpc_task(task);
Fred Isamanc31663d2011-01-06 11:36:24 +00008059 if (status == 0)
8060 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04008061 trace_nfs4_layoutget(lgp->args.ctx,
8062 &lgp->args.range,
8063 &lgp->res.range,
Olga Kornievskaia48c95792015-11-24 13:29:41 -05008064 &lgp->res.stateid,
Trond Myklebust1037e6e2013-08-14 16:36:51 -04008065 status);
Weston Andros Adamson085b7a42013-02-15 16:03:46 -05008066 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8067 if (status == 0 && lgp->res.layoutp->len)
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008068 lseg = pnfs_layout_process(lgp);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008069 rpc_put_task(task);
8070 dprintk("<-- %s status=%d\n", __func__, status);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008071 if (status)
8072 return ERR_PTR(status);
8073 return lseg;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008074}
8075
Benny Halevycbe82602011-05-22 19:52:37 +03008076static void
8077nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8078{
8079 struct nfs4_layoutreturn *lrp = calldata;
8080
8081 dprintk("--> %s\n", __func__);
Trond Myklebustd9afbd12012-10-22 20:28:44 -04008082 nfs41_setup_sequence(lrp->clp->cl_session,
8083 &lrp->args.seq_args,
8084 &lrp->res.seq_res,
8085 task);
Benny Halevycbe82602011-05-22 19:52:37 +03008086}
8087
8088static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8089{
8090 struct nfs4_layoutreturn *lrp = calldata;
8091 struct nfs_server *server;
8092
8093 dprintk("--> %s\n", __func__);
8094
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008095 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
Benny Halevycbe82602011-05-22 19:52:37 +03008096 return;
8097
8098 server = NFS_SERVER(lrp->args.inode);
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05008099 switch (task->tk_status) {
8100 default:
8101 task->tk_status = 0;
8102 case 0:
8103 break;
8104 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10008105 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05008106 break;
Trond Myklebustd00c5d42011-10-19 12:17:29 -07008107 rpc_restart_call_prepare(task);
Benny Halevycbe82602011-05-22 19:52:37 +03008108 return;
8109 }
Benny Halevycbe82602011-05-22 19:52:37 +03008110 dprintk("<-- %s\n", __func__);
8111}
8112
8113static void nfs4_layoutreturn_release(void *calldata)
8114{
8115 struct nfs4_layoutreturn *lrp = calldata;
Trond Myklebust849b2862012-09-24 14:18:39 -04008116 struct pnfs_layout_hdr *lo = lrp->args.layout;
Trond Myklebustc5d73712015-07-09 17:58:39 +02008117 LIST_HEAD(freeme);
Benny Halevycbe82602011-05-22 19:52:37 +03008118
8119 dprintk("--> %s\n", __func__);
Trond Myklebust849b2862012-09-24 14:18:39 -04008120 spin_lock(&lo->plh_inode->i_lock);
Trond Myklebust0654cc72015-12-28 11:48:14 -05008121 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8122 pnfs_mark_layout_returned_if_empty(lo);
Trond Myklebust849b2862012-09-24 14:18:39 -04008123 if (lrp->res.lrs_present)
8124 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
Tom Haynesd67ae822014-12-11 17:02:04 -05008125 pnfs_clear_layoutreturn_waitbit(lo);
Trond Myklebust849b2862012-09-24 14:18:39 -04008126 spin_unlock(&lo->plh_inode->i_lock);
Trond Myklebustc5d73712015-07-09 17:58:39 +02008127 pnfs_free_lseg_list(&freeme);
Trond Myklebust70c3bd22012-09-18 20:51:13 -04008128 pnfs_put_layout_hdr(lrp->args.layout);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008129 nfs_iput_and_deactive(lrp->inode);
Benny Halevycbe82602011-05-22 19:52:37 +03008130 kfree(calldata);
8131 dprintk("<-- %s\n", __func__);
8132}
8133
8134static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8135 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8136 .rpc_call_done = nfs4_layoutreturn_done,
8137 .rpc_release = nfs4_layoutreturn_release,
8138};
8139
Peng Tao6c166052014-11-17 09:30:40 +08008140int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
Benny Halevycbe82602011-05-22 19:52:37 +03008141{
8142 struct rpc_task *task;
8143 struct rpc_message msg = {
8144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8145 .rpc_argp = &lrp->args,
8146 .rpc_resp = &lrp->res,
Trond Myklebust95560002013-05-20 10:43:47 -04008147 .rpc_cred = lrp->cred,
Benny Halevycbe82602011-05-22 19:52:37 +03008148 };
8149 struct rpc_task_setup task_setup_data = {
Andy Adamson1771c572013-07-22 12:42:05 -04008150 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
Benny Halevycbe82602011-05-22 19:52:37 +03008151 .rpc_message = &msg,
8152 .callback_ops = &nfs4_layoutreturn_call_ops,
8153 .callback_data = lrp,
8154 };
Peng Tao6c166052014-11-17 09:30:40 +08008155 int status = 0;
Benny Halevycbe82602011-05-22 19:52:37 +03008156
Andrew Elble99ade3c2015-12-02 09:39:51 -05008157 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8158 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8159 &task_setup_data.rpc_client, &msg);
8160
Benny Halevycbe82602011-05-22 19:52:37 +03008161 dprintk("--> %s\n", __func__);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008162 if (!sync) {
8163 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8164 if (!lrp->inode) {
8165 nfs4_layoutreturn_release(lrp);
8166 return -EAGAIN;
8167 }
8168 task_setup_data.flags |= RPC_TASK_ASYNC;
8169 }
Chuck Levera9c92d62013-08-09 12:48:18 -04008170 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
Benny Halevycbe82602011-05-22 19:52:37 +03008171 task = rpc_run_task(&task_setup_data);
8172 if (IS_ERR(task))
8173 return PTR_ERR(task);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008174 if (sync)
8175 status = task->tk_status;
Olga Kornievskaia48c95792015-11-24 13:29:41 -05008176 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
Benny Halevycbe82602011-05-22 19:52:37 +03008177 dprintk("<-- %s status=%d\n", __func__, status);
8178 rpc_put_task(task);
8179 return status;
8180}
8181
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008182static int
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008183_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8184 struct pnfs_device *pdev,
8185 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008186{
8187 struct nfs4_getdeviceinfo_args args = {
8188 .pdev = pdev,
Trond Myklebust4e590802015-03-09 14:01:25 -04008189 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8190 NOTIFY_DEVICEID4_DELETE,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008191 };
8192 struct nfs4_getdeviceinfo_res res = {
8193 .pdev = pdev,
8194 };
8195 struct rpc_message msg = {
8196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8197 .rpc_argp = &args,
8198 .rpc_resp = &res,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008199 .rpc_cred = cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008200 };
8201 int status;
8202
8203 dprintk("--> %s\n", __func__);
Bryan Schumaker7c513052011-03-24 17:12:24 +00008204 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Trond Myklebust4e590802015-03-09 14:01:25 -04008205 if (res.notification & ~args.notify_types)
8206 dprintk("%s: unsupported notification\n", __func__);
Trond Myklebustdf526992015-03-09 14:48:32 -04008207 if (res.notification != args.notify_types)
8208 pdev->nocache = 1;
Trond Myklebust4e590802015-03-09 14:01:25 -04008209
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008210 dprintk("<-- %s status=%d\n", __func__, status);
8211
8212 return status;
8213}
8214
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008215int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8216 struct pnfs_device *pdev,
8217 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008218{
8219 struct nfs4_exception exception = { };
8220 int err;
8221
8222 do {
8223 err = nfs4_handle_exception(server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008224 _nfs4_proc_getdeviceinfo(server, pdev, cred),
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008225 &exception);
8226 } while (exception.retry);
8227 return err;
8228}
8229EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8230
Andy Adamson863a3c62011-03-23 13:27:54 +00008231static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8232{
8233 struct nfs4_layoutcommit_data *data = calldata;
8234 struct nfs_server *server = NFS_SERVER(data->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008235 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamson863a3c62011-03-23 13:27:54 +00008236
Trond Myklebustd9afbd12012-10-22 20:28:44 -04008237 nfs41_setup_sequence(session,
8238 &data->args.seq_args,
8239 &data->res.seq_res,
8240 task);
Andy Adamson863a3c62011-03-23 13:27:54 +00008241}
8242
8243static void
8244nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8245{
8246 struct nfs4_layoutcommit_data *data = calldata;
8247 struct nfs_server *server = NFS_SERVER(data->args.inode);
8248
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008249 if (!nfs41_sequence_done(task, &data->res.seq_res))
Andy Adamson863a3c62011-03-23 13:27:54 +00008250 return;
8251
8252 switch (task->tk_status) { /* Just ignore these failures */
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008253 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8254 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8255 case -NFS4ERR_BADLAYOUT: /* no layout */
8256 case -NFS4ERR_GRACE: /* loca_recalim always false */
Andy Adamson863a3c62011-03-23 13:27:54 +00008257 task->tk_status = 0;
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008258 case 0:
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008259 break;
8260 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10008261 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008262 rpc_restart_call_prepare(task);
8263 return;
8264 }
8265 }
Andy Adamson863a3c62011-03-23 13:27:54 +00008266}
8267
8268static void nfs4_layoutcommit_release(void *calldata)
8269{
8270 struct nfs4_layoutcommit_data *data = calldata;
8271
Andy Adamsondb29c082011-07-30 20:52:38 -04008272 pnfs_cleanup_layoutcommit(data);
Trond Myklebustd8c951c2014-01-13 12:08:11 -05008273 nfs_post_op_update_inode_force_wcc(data->args.inode,
8274 data->res.fattr);
Andy Adamson863a3c62011-03-23 13:27:54 +00008275 put_rpccred(data->cred);
Trond Myklebust472e2592015-02-05 16:50:30 -05008276 nfs_iput_and_deactive(data->inode);
Andy Adamson863a3c62011-03-23 13:27:54 +00008277 kfree(data);
8278}
8279
8280static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8281 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8282 .rpc_call_done = nfs4_layoutcommit_done,
8283 .rpc_release = nfs4_layoutcommit_release,
8284};
8285
8286int
Andy Adamsonef311532011-03-12 02:58:10 -05008287nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +00008288{
8289 struct rpc_message msg = {
8290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8291 .rpc_argp = &data->args,
8292 .rpc_resp = &data->res,
8293 .rpc_cred = data->cred,
8294 };
8295 struct rpc_task_setup task_setup_data = {
8296 .task = &data->task,
8297 .rpc_client = NFS_CLIENT(data->args.inode),
8298 .rpc_message = &msg,
8299 .callback_ops = &nfs4_layoutcommit_ops,
8300 .callback_data = data,
Andy Adamson863a3c62011-03-23 13:27:54 +00008301 };
8302 struct rpc_task *task;
8303 int status = 0;
8304
Kinglong Meeb4839eb2015-07-01 12:00:13 +08008305 dprintk("NFS: initiating layoutcommit call. sync %d "
8306 "lbw: %llu inode %lu\n", sync,
Andy Adamson863a3c62011-03-23 13:27:54 +00008307 data->args.lastbytewritten,
8308 data->args.inode->i_ino);
8309
Trond Myklebust472e2592015-02-05 16:50:30 -05008310 if (!sync) {
8311 data->inode = nfs_igrab_and_active(data->args.inode);
8312 if (data->inode == NULL) {
8313 nfs4_layoutcommit_release(data);
8314 return -EAGAIN;
8315 }
8316 task_setup_data.flags = RPC_TASK_ASYNC;
8317 }
Chuck Levera9c92d62013-08-09 12:48:18 -04008318 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Andy Adamson863a3c62011-03-23 13:27:54 +00008319 task = rpc_run_task(&task_setup_data);
8320 if (IS_ERR(task))
8321 return PTR_ERR(task);
Trond Myklebust472e2592015-02-05 16:50:30 -05008322 if (sync)
8323 status = task->tk_status;
Olga Kornievskaia48c95792015-11-24 13:29:41 -05008324 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
Andy Adamson863a3c62011-03-23 13:27:54 +00008325 dprintk("%s: status %d\n", __func__, status);
8326 rpc_put_task(task);
8327 return status;
8328}
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008329
Andy Adamson97431202013-08-08 10:57:56 -04008330/**
8331 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8332 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8333 */
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008334static int
8335_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008336 struct nfs_fsinfo *info,
8337 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008338{
8339 struct nfs41_secinfo_no_name_args args = {
8340 .style = SECINFO_STYLE_CURRENT_FH,
8341 };
8342 struct nfs4_secinfo_res res = {
8343 .flavors = flavors,
8344 };
8345 struct rpc_message msg = {
8346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8347 .rpc_argp = &args,
8348 .rpc_resp = &res,
8349 };
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008350 struct rpc_clnt *clnt = server->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008351 struct rpc_cred *cred = NULL;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008352 int status;
8353
8354 if (use_integrity) {
8355 clnt = server->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008356 cred = nfs4_get_clid_cred(server->nfs_client);
8357 msg.rpc_cred = cred;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008358 }
8359
8360 dprintk("--> %s\n", __func__);
8361 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8362 &res.seq_res, 0);
8363 dprintk("<-- %s status=%d\n", __func__, status);
8364
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008365 if (cred)
8366 put_rpccred(cred);
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008367
8368 return status;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008369}
8370
8371static int
8372nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8373 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8374{
8375 struct nfs4_exception exception = { };
8376 int err;
8377 do {
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008378 /* first try using integrity protection */
8379 err = -NFS4ERR_WRONGSEC;
8380
8381 /* try to use integrity protection with machine cred */
8382 if (_nfs4_is_integrity_protected(server->nfs_client))
8383 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8384 flavors, true);
8385
8386 /*
8387 * if unable to use integrity protection, or SECINFO with
8388 * integrity protection returns NFS4ERR_WRONGSEC (which is
8389 * disallowed by spec, but exists in deployed servers) use
8390 * the current filesystem's rpc_client and the user cred.
8391 */
8392 if (err == -NFS4ERR_WRONGSEC)
8393 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8394 flavors, false);
8395
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008396 switch (err) {
8397 case 0:
8398 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008399 case -ENOTSUPP:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008400 goto out;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008401 default:
8402 err = nfs4_handle_exception(server, err, &exception);
8403 }
8404 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008405out:
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008406 return err;
8407}
8408
8409static int
8410nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8411 struct nfs_fsinfo *info)
8412{
8413 int err;
8414 struct page *page;
Anna Schumaker367156d2013-09-25 17:02:48 -04008415 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008416 struct nfs4_secinfo_flavors *flavors;
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008417 struct nfs4_secinfo4 *secinfo;
8418 int i;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008419
8420 page = alloc_page(GFP_KERNEL);
8421 if (!page) {
8422 err = -ENOMEM;
8423 goto out;
8424 }
8425
8426 flavors = page_address(page);
8427 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8428
8429 /*
8430 * Fall back on "guess and check" method if
8431 * the server doesn't support SECINFO_NO_NAME
8432 */
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008433 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008434 err = nfs4_find_root_sec(server, fhandle, info);
8435 goto out_freepage;
8436 }
8437 if (err)
8438 goto out_freepage;
8439
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008440 for (i = 0; i < flavors->num_flavors; i++) {
8441 secinfo = &flavors->flavors[i];
8442
8443 switch (secinfo->flavor) {
8444 case RPC_AUTH_NULL:
8445 case RPC_AUTH_UNIX:
8446 case RPC_AUTH_GSS:
8447 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8448 &secinfo->flavor_info);
8449 break;
8450 default:
8451 flavor = RPC_AUTH_MAXFLAVOR;
8452 break;
8453 }
8454
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04008455 if (!nfs_auth_info_match(&server->auth_info, flavor))
8456 flavor = RPC_AUTH_MAXFLAVOR;
8457
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008458 if (flavor != RPC_AUTH_MAXFLAVOR) {
8459 err = nfs4_lookup_root_sec(server, fhandle,
8460 info, flavor);
8461 if (!err)
8462 break;
8463 }
8464 }
8465
8466 if (flavor == RPC_AUTH_MAXFLAVOR)
8467 err = -EPERM;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008468
8469out_freepage:
8470 put_page(page);
8471 if (err == -EACCES)
8472 return -EPERM;
8473out:
8474 return err;
8475}
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008476
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008477static int _nfs41_test_stateid(struct nfs_server *server,
8478 nfs4_stateid *stateid,
8479 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008480{
8481 int status;
8482 struct nfs41_test_stateid_args args = {
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008483 .stateid = stateid,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008484 };
8485 struct nfs41_test_stateid_res res;
8486 struct rpc_message msg = {
8487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8488 .rpc_argp = &args,
8489 .rpc_resp = &res,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008490 .rpc_cred = cred,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008491 };
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008492 struct rpc_clnt *rpc_client = server->client;
8493
8494 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8495 &rpc_client, &msg);
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008496
Chuck Lever38527b12012-07-11 16:30:23 -04008497 dprintk("NFS call test_stateid %p\n", stateid);
Chuck Levera9c92d62013-08-09 12:48:18 -04008498 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008499 nfs4_set_sequence_privileged(&args.seq_args);
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008500 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008501 &args.seq_args, &res.seq_res);
Chuck Lever38527b12012-07-11 16:30:23 -04008502 if (status != NFS_OK) {
8503 dprintk("NFS reply test_stateid: failed, %d\n", status);
Chuck Lever377e5072012-07-11 16:29:45 -04008504 return status;
Chuck Lever38527b12012-07-11 16:30:23 -04008505 }
8506 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
Chuck Lever377e5072012-07-11 16:29:45 -04008507 return -res.status;
Bryan Schumaker7d974792011-06-02 14:59:08 -04008508}
8509
Chuck Lever38527b12012-07-11 16:30:23 -04008510/**
8511 * nfs41_test_stateid - perform a TEST_STATEID operation
8512 *
8513 * @server: server / transport on which to perform the operation
8514 * @stateid: state ID to test
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008515 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008516 *
8517 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8518 * Otherwise a negative NFS4ERR value is returned if the operation
8519 * failed or the state ID is not currently valid.
8520 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008521static int nfs41_test_stateid(struct nfs_server *server,
8522 nfs4_stateid *stateid,
8523 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008524{
8525 struct nfs4_exception exception = { };
8526 int err;
8527 do {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008528 err = _nfs41_test_stateid(server, stateid, cred);
Chuck Lever377e5072012-07-11 16:29:45 -04008529 if (err != -NFS4ERR_DELAY)
8530 break;
8531 nfs4_handle_exception(server, err, &exception);
Bryan Schumaker7d974792011-06-02 14:59:08 -04008532 } while (exception.retry);
8533 return err;
8534}
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008535
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008536struct nfs_free_stateid_data {
8537 struct nfs_server *server;
8538 struct nfs41_free_stateid_args args;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008539 struct nfs41_free_stateid_res res;
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008540};
8541
8542static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8543{
8544 struct nfs_free_stateid_data *data = calldata;
8545 nfs41_setup_sequence(nfs4_get_session(data->server),
8546 &data->args.seq_args,
8547 &data->res.seq_res,
8548 task);
8549}
8550
8551static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8552{
8553 struct nfs_free_stateid_data *data = calldata;
8554
8555 nfs41_sequence_done(task, &data->res.seq_res);
8556
8557 switch (task->tk_status) {
8558 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10008559 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008560 rpc_restart_call_prepare(task);
8561 }
8562}
8563
8564static void nfs41_free_stateid_release(void *calldata)
8565{
8566 kfree(calldata);
8567}
8568
Trond Myklebust17f26b12013-08-21 15:48:42 -04008569static const struct rpc_call_ops nfs41_free_stateid_ops = {
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008570 .rpc_call_prepare = nfs41_free_stateid_prepare,
8571 .rpc_call_done = nfs41_free_stateid_done,
8572 .rpc_release = nfs41_free_stateid_release,
8573};
8574
8575static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8576 nfs4_stateid *stateid,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008577 struct rpc_cred *cred,
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008578 bool privileged)
8579{
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008580 struct rpc_message msg = {
8581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008582 .rpc_cred = cred,
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008583 };
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008584 struct rpc_task_setup task_setup = {
8585 .rpc_client = server->client,
8586 .rpc_message = &msg,
8587 .callback_ops = &nfs41_free_stateid_ops,
8588 .flags = RPC_TASK_ASYNC,
8589 };
8590 struct nfs_free_stateid_data *data;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008591
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008592 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8593 &task_setup.rpc_client, &msg);
8594
Chuck Lever38527b12012-07-11 16:30:23 -04008595 dprintk("NFS call free_stateid %p\n", stateid);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008596 data = kmalloc(sizeof(*data), GFP_NOFS);
8597 if (!data)
8598 return ERR_PTR(-ENOMEM);
8599 data->server = server;
8600 nfs4_stateid_copy(&data->args.stateid, stateid);
8601
8602 task_setup.callback_data = data;
8603
8604 msg.rpc_argp = &data->args;
8605 msg.rpc_resp = &data->res;
Chuck Levera9c92d62013-08-09 12:48:18 -04008606 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008607 if (privileged)
8608 nfs4_set_sequence_privileged(&data->args.seq_args);
8609
8610 return rpc_run_task(&task_setup);
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008611}
8612
Chuck Lever38527b12012-07-11 16:30:23 -04008613/**
8614 * nfs41_free_stateid - perform a FREE_STATEID operation
8615 *
8616 * @server: server / transport on which to perform the operation
8617 * @stateid: state ID to release
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008618 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008619 *
8620 * Returns NFS_OK if the server freed "stateid". Otherwise a
8621 * negative NFS4ERR value is returned.
8622 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008623static int nfs41_free_stateid(struct nfs_server *server,
8624 nfs4_stateid *stateid,
8625 struct rpc_cred *cred)
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008626{
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008627 struct rpc_task *task;
8628 int ret;
8629
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008630 task = _nfs41_free_stateid(server, stateid, cred, true);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008631 if (IS_ERR(task))
8632 return PTR_ERR(task);
8633 ret = rpc_wait_for_completion_task(task);
8634 if (!ret)
8635 ret = task->tk_status;
8636 rpc_put_task(task);
8637 return ret;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008638}
Trond Myklebust36281ca2012-03-04 18:13:56 -05008639
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008640static void
8641nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008642{
8643 struct rpc_task *task;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008644 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008645
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008646 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008647 nfs4_free_lock_state(server, lsp);
8648 if (IS_ERR(task))
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008649 return;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008650 rpc_put_task(task);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008651}
8652
Trond Myklebust36281ca2012-03-04 18:13:56 -05008653static bool nfs41_match_stateid(const nfs4_stateid *s1,
8654 const nfs4_stateid *s2)
8655{
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008656 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008657 return false;
8658
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008659 if (s1->seqid == s2->seqid)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008660 return true;
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008661 if (s1->seqid == 0 || s2->seqid == 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008662 return true;
8663
8664 return false;
8665}
8666
Andy Adamson557134a2009-04-01 09:21:53 -04008667#endif /* CONFIG_NFS_V4_1 */
8668
Trond Myklebust36281ca2012-03-04 18:13:56 -05008669static bool nfs4_match_stateid(const nfs4_stateid *s1,
8670 const nfs4_stateid *s2)
8671{
Trond Myklebustf597c532012-03-04 18:13:56 -05008672 return nfs4_stateid_match(s1, s2);
Trond Myklebust36281ca2012-03-04 18:13:56 -05008673}
8674
8675
Trond Myklebust17280172012-03-11 13:11:00 -04008676static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008677 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008678 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008679 .recover_open = nfs4_open_reclaim,
8680 .recover_lock = nfs4_lock_reclaim,
Andy Adamson591d71c2009-04-01 09:22:47 -04008681 .establish_clid = nfs4_init_clientid,
Chuck Lever05f4c352012-09-14 17:24:32 -04008682 .detect_trunking = nfs40_discover_server_trunking,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008683};
8684
Andy Adamson591d71c2009-04-01 09:22:47 -04008685#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008686static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008687 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8688 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8689 .recover_open = nfs4_open_reclaim,
8690 .recover_lock = nfs4_lock_reclaim,
Andy Adamson4d643d12009-12-04 15:52:24 -05008691 .establish_clid = nfs41_init_clientid,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05008692 .reclaim_complete = nfs41_proc_reclaim_complete,
Chuck Lever05f4c352012-09-14 17:24:32 -04008693 .detect_trunking = nfs41_discover_server_trunking,
Andy Adamson591d71c2009-04-01 09:22:47 -04008694};
8695#endif /* CONFIG_NFS_V4_1 */
8696
Trond Myklebust17280172012-03-11 13:11:00 -04008697static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008698 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008699 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Trond Myklebust4dfd4f72014-10-17 15:10:25 +03008700 .recover_open = nfs40_open_expired,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008701 .recover_lock = nfs4_lock_expired,
Andy Adamson591d71c2009-04-01 09:22:47 -04008702 .establish_clid = nfs4_init_clientid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008703};
8704
Andy Adamson591d71c2009-04-01 09:22:47 -04008705#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008706static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008707 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8708 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Bryan Schumakerf062eb62011-06-02 14:59:10 -04008709 .recover_open = nfs41_open_expired,
8710 .recover_lock = nfs41_lock_expired,
Andy Adamson4d643d12009-12-04 15:52:24 -05008711 .establish_clid = nfs41_init_clientid,
Andy Adamson591d71c2009-04-01 09:22:47 -04008712};
8713#endif /* CONFIG_NFS_V4_1 */
8714
Trond Myklebust17280172012-03-11 13:11:00 -04008715static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008716 .sched_state_renewal = nfs4_proc_async_renew,
Andy Adamsona7b72102009-04-01 09:22:46 -04008717 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008718 .renew_lease = nfs4_proc_renew,
Benny Halevy29fba382009-04-01 09:22:44 -04008719};
8720
8721#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008722static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008723 .sched_state_renewal = nfs41_proc_async_sequence,
Andy Adamsona7b72102009-04-01 09:22:46 -04008724 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008725 .renew_lease = nfs4_proc_sequence,
Benny Halevy29fba382009-04-01 09:22:44 -04008726};
8727#endif
8728
Chuck Leverec011fe2013-10-17 14:12:39 -04008729static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008730 .get_locations = _nfs40_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008731 .fsid_present = _nfs40_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008732};
8733
8734#if defined(CONFIG_NFS_V4_1)
8735static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008736 .get_locations = _nfs41_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008737 .fsid_present = _nfs41_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008738};
8739#endif /* CONFIG_NFS_V4_1 */
8740
Trond Myklebust97dc1352010-06-16 09:52:26 -04008741static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8742 .minor_version = 0,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008743 .init_caps = NFS_CAP_READDIRPLUS
8744 | NFS_CAP_ATOMIC_OPEN
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008745 | NFS_CAP_POSIX_LOCK,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008746 .init_client = nfs40_init_client,
8747 .shutdown_client = nfs40_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008748 .match_stateid = nfs4_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008749 .find_root_sec = nfs4_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008750 .free_lock_state = nfs4_release_lockowner,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008751 .alloc_seqid = nfs_alloc_seqid,
Chuck Lever9915ea72013-08-09 12:48:27 -04008752 .call_sync_ops = &nfs40_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008753 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8754 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8755 .state_renewal_ops = &nfs40_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008756 .mig_recovery_ops = &nfs40_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008757};
8758
8759#if defined(CONFIG_NFS_V4_1)
Trond Myklebust63f5f792015-01-23 19:19:25 -05008760static struct nfs_seqid *
8761nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8762{
8763 return NULL;
8764}
8765
Trond Myklebust97dc1352010-06-16 09:52:26 -04008766static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8767 .minor_version = 1,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008768 .init_caps = NFS_CAP_READDIRPLUS
8769 | NFS_CAP_ATOMIC_OPEN
Trond Myklebust3b664862013-03-17 15:31:15 -04008770 | NFS_CAP_POSIX_LOCK
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04008771 | NFS_CAP_STATEID_NFSV41
Anna Schumakere9831202014-10-22 15:53:10 -04008772 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008773 .init_client = nfs41_init_client,
8774 .shutdown_client = nfs41_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008775 .match_stateid = nfs41_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008776 .find_root_sec = nfs41_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008777 .free_lock_state = nfs41_free_lock_state,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008778 .alloc_seqid = nfs_alloc_no_seqid,
Chuck Lever9915ea72013-08-09 12:48:27 -04008779 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008780 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8781 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8782 .state_renewal_ops = &nfs41_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008783 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008784};
8785#endif
8786
Steve Dickson42c2c422013-05-22 12:50:38 -04008787#if defined(CONFIG_NFS_V4_2)
8788static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8789 .minor_version = 2,
Bryan Schumaker70173102013-06-19 13:41:43 -04008790 .init_caps = NFS_CAP_READDIRPLUS
8791 | NFS_CAP_ATOMIC_OPEN
Bryan Schumaker70173102013-06-19 13:41:43 -04008792 | NFS_CAP_POSIX_LOCK
8793 | NFS_CAP_STATEID_NFSV41
Anna Schumakere9831202014-10-22 15:53:10 -04008794 | NFS_CAP_ATOMIC_OPEN_V1
Anna Schumakerf4ac1672014-11-25 13:18:15 -05008795 | NFS_CAP_ALLOCATE
Anna Schumaker624bd5b2014-11-25 13:18:16 -05008796 | NFS_CAP_DEALLOCATE
Trond Myklebust6c5a0d82015-06-27 11:45:46 -04008797 | NFS_CAP_SEEK
Peng Taoe5341f32015-09-26 02:24:35 +08008798 | NFS_CAP_LAYOUTSTATS
8799 | NFS_CAP_CLONE,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008800 .init_client = nfs41_init_client,
8801 .shutdown_client = nfs41_shutdown_client,
Steve Dickson42c2c422013-05-22 12:50:38 -04008802 .match_stateid = nfs41_match_stateid,
8803 .find_root_sec = nfs41_find_root_sec,
Bryan Schumaker70173102013-06-19 13:41:43 -04008804 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008805 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008806 .alloc_seqid = nfs_alloc_no_seqid,
Steve Dickson42c2c422013-05-22 12:50:38 -04008807 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8808 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8809 .state_renewal_ops = &nfs41_state_renewal_ops,
Kinglong Mee18e3b732015-08-15 21:52:10 +08008810 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Steve Dickson42c2c422013-05-22 12:50:38 -04008811};
8812#endif
8813
Trond Myklebust97dc1352010-06-16 09:52:26 -04008814const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8815 [0] = &nfs_v4_0_minor_ops,
8816#if defined(CONFIG_NFS_V4_1)
8817 [1] = &nfs_v4_1_minor_ops,
8818#endif
Steve Dickson42c2c422013-05-22 12:50:38 -04008819#if defined(CONFIG_NFS_V4_2)
8820 [2] = &nfs_v4_2_minor_ops,
8821#endif
Trond Myklebust97dc1352010-06-16 09:52:26 -04008822};
8823
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01008824ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8825{
8826 ssize_t error, error2;
8827
8828 error = generic_listxattr(dentry, list, size);
8829 if (error < 0)
8830 return error;
8831 if (list) {
8832 list += error;
8833 size -= error;
8834 }
8835
8836 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8837 if (error2 < 0)
8838 return error2;
8839 return error + error2;
8840}
8841
Trond Myklebust17f26b12013-08-21 15:48:42 -04008842static const struct inode_operations nfs4_dir_inode_operations = {
Bryan Schumaker73a79702012-07-16 16:39:12 -04008843 .create = nfs_create,
8844 .lookup = nfs_lookup,
8845 .atomic_open = nfs_atomic_open,
8846 .link = nfs_link,
8847 .unlink = nfs_unlink,
8848 .symlink = nfs_symlink,
8849 .mkdir = nfs_mkdir,
8850 .rmdir = nfs_rmdir,
8851 .mknod = nfs_mknod,
8852 .rename = nfs_rename,
8853 .permission = nfs_permission,
8854 .getattr = nfs_getattr,
8855 .setattr = nfs_setattr,
8856 .getxattr = generic_getxattr,
8857 .setxattr = generic_setxattr,
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01008858 .listxattr = nfs4_listxattr,
Bryan Schumaker73a79702012-07-16 16:39:12 -04008859 .removexattr = generic_removexattr,
8860};
8861
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08008862static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008863 .permission = nfs_permission,
8864 .getattr = nfs_getattr,
8865 .setattr = nfs_setattr,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008866 .getxattr = generic_getxattr,
8867 .setxattr = generic_setxattr,
Andreas Gruenbacherc4803c42015-12-02 14:44:41 +01008868 .listxattr = nfs4_listxattr,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008869 .removexattr = generic_removexattr,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008870};
8871
David Howells509de812006-08-22 20:06:11 -04008872const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07008873 .version = 4, /* protocol version */
8874 .dentry_ops = &nfs4_dentry_operations,
8875 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008876 .file_inode_ops = &nfs4_file_inode_operations,
Jeff Layton1788ea62011-11-04 13:31:21 -04008877 .file_ops = &nfs4_file_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008878 .getroot = nfs4_proc_get_root,
Bryan Schumaker281cad42012-04-27 13:27:45 -04008879 .submount = nfs4_submount,
Bryan Schumakerff9099f22012-07-30 16:05:18 -04008880 .try_mount = nfs4_try_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008881 .getattr = nfs4_proc_getattr,
8882 .setattr = nfs4_proc_setattr,
8883 .lookup = nfs4_proc_lookup,
8884 .access = nfs4_proc_access,
8885 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008886 .create = nfs4_proc_create,
8887 .remove = nfs4_proc_remove,
8888 .unlink_setup = nfs4_proc_unlink_setup,
Bryan Schumaker34e137c2012-03-19 14:54:41 -04008889 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008890 .unlink_done = nfs4_proc_unlink_done,
Jeff Laytond3d41522010-09-17 17:31:57 -04008891 .rename_setup = nfs4_proc_rename_setup,
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04008892 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
Jeff Laytond3d41522010-09-17 17:31:57 -04008893 .rename_done = nfs4_proc_rename_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008894 .link = nfs4_proc_link,
8895 .symlink = nfs4_proc_symlink,
8896 .mkdir = nfs4_proc_mkdir,
8897 .rmdir = nfs4_proc_remove,
8898 .readdir = nfs4_proc_readdir,
8899 .mknod = nfs4_proc_mknod,
8900 .statfs = nfs4_proc_statfs,
8901 .fsinfo = nfs4_proc_fsinfo,
8902 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04008903 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008904 .decode_dirent = nfs4_decode_dirent,
Anna Schumakera4cdda52014-05-06 09:12:31 -04008905 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008906 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05008907 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008908 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008909 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008910 .commit_setup = nfs4_proc_commit_setup,
Fred Isaman0b7c0152012-04-20 14:47:39 -04008911 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008912 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008913 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00008914 .clear_acl_cache = nfs4_zap_acl_attr,
Trond Myklebust7fe5c392009-03-19 15:35:50 -04008915 .close_context = nfs4_close_context,
Trond Myklebust2b484292010-09-17 10:56:51 -04008916 .open_context = nfs4_atomic_open,
Bryan Schumaker011e2a72012-06-20 15:53:43 -04008917 .have_delegation = nfs4_have_delegation,
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04008918 .return_delegation = nfs4_inode_return_delegation,
Bryan Schumaker6663ee72012-06-20 15:53:46 -04008919 .alloc_client = nfs4_alloc_client,
Andy Adamson45a52a02011-03-01 01:34:08 +00008920 .init_client = nfs4_init_client,
Bryan Schumakercdb7ece2012-06-20 15:53:45 -04008921 .free_client = nfs4_free_client,
Bryan Schumaker1179acc2012-07-30 16:05:19 -04008922 .create_server = nfs4_create_server,
8923 .clone_server = nfs_clone_server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008924};
8925
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008926static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
Andreas Gruenbacher98e9cb52015-12-02 14:44:36 +01008927 .name = XATTR_NAME_NFSV4_ACL,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008928 .list = nfs4_xattr_list_nfs4_acl,
8929 .get = nfs4_xattr_get_nfs4_acl,
8930 .set = nfs4_xattr_set_nfs4_acl,
8931};
8932
8933const struct xattr_handler *nfs4_xattr_handlers[] = {
8934 &nfs4_xattr_nfs4_acl_handler,
David Quigleyc9bccef2013-05-22 12:50:45 -04008935#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8936 &nfs4_xattr_nfs4_label_handler,
8937#endif
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008938 NULL
8939};
8940
Linus Torvalds1da177e2005-04-16 15:20:36 -07008941/*
8942 * Local variables:
8943 * c-basic-offset: 8
8944 * End:
8945 */