blob: 765a035593638cfd17b4aedd646c0362068343c6 [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
211};
212
Andy Adamsone23008e2012-10-02 21:07:32 -0400213static const u32 nfs4_open_noattr_bitmap[3] = {
214 FATTR4_WORD0_TYPE
215 | FATTR4_WORD0_CHANGE
216 | FATTR4_WORD0_FILEID,
217};
218
David Quigleya09df2c2013-05-22 12:50:41 -0400219const u32 nfs4_statfs_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 FATTR4_WORD0_FILES_AVAIL
221 | FATTR4_WORD0_FILES_FREE
222 | FATTR4_WORD0_FILES_TOTAL,
223 FATTR4_WORD1_SPACE_AVAIL
224 | FATTR4_WORD1_SPACE_FREE
225 | FATTR4_WORD1_SPACE_TOTAL
226};
227
David Quigleya09df2c2013-05-22 12:50:41 -0400228const u32 nfs4_pathconf_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 FATTR4_WORD0_MAXLINK
230 | FATTR4_WORD0_MAXNAME,
231 0
232};
233
Fred Isamandae100c2011-07-30 20:52:37 -0400234const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 | FATTR4_WORD0_MAXREAD
236 | FATTR4_WORD0_MAXWRITE
237 | FATTR4_WORD0_LEASE_TIME,
Ricardo Labiaga55b6e772010-10-12 16:30:06 -0700238 FATTR4_WORD1_TIME_DELTA
Fred Isamandae100c2011-07-30 20:52:37 -0400239 | FATTR4_WORD1_FS_LAYOUT_TYPES,
240 FATTR4_WORD2_LAYOUT_BLKSIZE
Peng Tao2a92ee92015-09-26 02:24:37 +0800241 | FATTR4_WORD2_CLONE_BLKSIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242};
243
David Quigleya09df2c2013-05-22 12:50:41 -0400244const u32 nfs4_fs_locations_bitmap[3] = {
Manoj Naik830b8e32006-06-09 09:34:25 -0400245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
David Quigleya09df2c2013-05-22 12:50:41 -0400260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
Manoj Naik830b8e32006-06-09 09:34:25 -0400261};
262
Al Virobc4785c2006-10-19 23:28:51 -0700263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct nfs4_readdir_arg *readdir)
265{
Al Viro0dbb4c62006-10-19 23:28:49 -0700266 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000269 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
Cong Wang2b86ce22011-11-25 23:14:33 +0800286 start = p = kmap_atomic(*readdir->pages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
David Howells2b0143b2015-03-17 22:25:59 +0000298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
David Howells2b0143b2015-03-17 22:25:59 +0000310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
Cong Wang2b86ce22011-11-25 23:14:33 +0800314 kunmap_atomic(start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
NeilBrown8478eaa2014-09-18 16:09:27 +1000317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
Trond Myklebust65de8722008-12-23 15:21:44 -0500331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
NeilBrown8478eaa2014-09-18 16:09:27 +1000337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
Trond Myklebust65de8722008-12-23 15:21:44 -0500339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
Trond Myklebust65de8722008-12-23 15:21:44 -0500341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400347static int nfs4_do_handle_exception(struct nfs_server *server,
348 int errorcode, struct nfs4_exception *exception)
Trond Myklebust65de8722008-12-23 15:21:44 -0500349{
350 struct nfs_client *clp = server->nfs_client;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500351 struct nfs4_state *state = exception->state;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500352 struct inode *inode = exception->inode;
Trond Myklebust65de8722008-12-23 15:21:44 -0500353 int ret = errorcode;
354
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400355 exception->delay = 0;
356 exception->recovering = 0;
Trond Myklebust65de8722008-12-23 15:21:44 -0500357 exception->retry = 0;
358 switch(errorcode) {
359 case 0:
360 return 0;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500361 case -NFS4ERR_OPENMODE:
Trond Myklebust5ba12442015-06-16 11:26:35 -0400362 case -NFS4ERR_DELEG_REVOKED:
363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
Trond Myklebust4816fda2015-09-20 14:58:42 -0400365 if (inode && nfs_async_inode_return_delegation(inode,
366 NULL) == 0)
367 goto wait_on_recovery;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500368 if (state == NULL)
369 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500373 goto wait_on_recovery;
Trond Myklebust0ced63d2011-05-26 14:26:35 -0400374 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -0400375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500380 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500381 case -NFS4ERR_STALE_CLIENTID:
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
Chuck Lever519ae252013-10-17 14:13:19 -0400384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -0400389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500392#if defined(CONFIG_NFS_V4_1)
Andy Adamson4745e312009-04-01 09:22:42 -0400393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
Trond Myklebust9f594792012-05-27 13:02:53 -0400402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
Bryan Schumaker399f11c2012-10-30 16:06:35 -0400403 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500404#endif /* defined(CONFIG_NFS_V4_1) */
Trond Myklebust65de8722008-12-23 15:21:44 -0500405 case -NFS4ERR_FILE_OPEN:
NeilBrown44ed3552009-12-03 15:58:56 -0500406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500413 case -NFS4ERR_DELAY:
Trond Myklebust2598ed32015-09-20 16:10:18 -0400414 nfs_inc_server_stats(server, NFSIOS_DELAY);
415 case -NFS4ERR_GRACE:
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400416 exception->delay = 1;
417 return 0;
418
Andy Adamsona8a4ae32011-05-03 13:43:03 -0400419 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebust65de8722008-12-23 15:21:44 -0500420 case -NFS4ERR_OLD_STATEID:
421 exception->retry = 1;
Trond Myklebustb064eca22011-02-22 15:44:32 -0800422 break;
423 case -NFS4ERR_BADOWNER:
424 /* The following works around a Linux server bug! */
425 case -NFS4ERR_BADNAME:
426 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
427 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
428 exception->retry = 1;
429 printk(KERN_WARNING "NFS: v4 server %s "
430 "does not accept raw "
431 "uid/gids. "
432 "Reenabling the idmapper.\n",
433 server->nfs_client->cl_hostname);
434 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500435 }
436 /* We failed to handle the error */
437 return nfs4_map_errors(ret);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500438wait_on_recovery:
Trond Myklebustb3c2aa02015-09-20 14:32:45 -0400439 exception->recovering = 1;
440 return 0;
441}
442
443/* This is the error handling routine for processes that are allowed
444 * to sleep.
445 */
446int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
447{
448 struct nfs_client *clp = server->nfs_client;
449 int ret;
450
451 ret = nfs4_do_handle_exception(server, errorcode, exception);
452 if (exception->delay) {
453 ret = nfs4_delay(server->client, &exception->timeout);
454 goto out_retry;
455 }
456 if (exception->recovering) {
457 ret = nfs4_wait_clnt_recover(clp);
458 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
459 return -EIO;
460 goto out_retry;
461 }
462 return ret;
463out_retry:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500464 if (ret == 0)
465 exception->retry = 1;
466 return ret;
Trond Myklebust65de8722008-12-23 15:21:44 -0500467}
468
Trond Myklebust037fc982015-09-20 15:51:00 -0400469static int
470nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
471 int errorcode, struct nfs4_exception *exception)
472{
473 struct nfs_client *clp = server->nfs_client;
474 int ret;
475
476 ret = nfs4_do_handle_exception(server, errorcode, exception);
477 if (exception->delay) {
478 rpc_delay(task, nfs4_update_delay(&exception->timeout));
479 goto out_retry;
480 }
481 if (exception->recovering) {
482 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
483 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
484 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
485 goto out_retry;
486 }
487 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
488 ret = -EIO;
489 return ret;
490out_retry:
491 if (ret == 0)
492 exception->retry = 1;
493 return ret;
494}
495
496static int
497nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
498 struct nfs4_state *state, long *timeout)
499{
500 struct nfs4_exception exception = {
501 .state = state,
502 };
503
504 if (task->tk_status >= 0)
505 return 0;
506 if (timeout)
507 exception.timeout = *timeout;
508 task->tk_status = nfs4_async_handle_exception(task, server,
509 task->tk_status,
510 &exception);
511 if (exception.delay && timeout)
512 *timeout = exception.timeout;
513 if (exception.retry)
514 return -EAGAIN;
515 return 0;
516}
517
Weston Andros Adamsona5250de2013-09-03 15:18:49 -0400518/*
519 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
520 * or 'false' otherwise.
521 */
522static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
523{
524 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
525
526 if (flavor == RPC_AUTH_GSS_KRB5I ||
527 flavor == RPC_AUTH_GSS_KRB5P)
528 return true;
529
530 return false;
531}
Trond Myklebust65de8722008-12-23 15:21:44 -0500532
Trond Myklebust452e9352010-07-31 14:29:06 -0400533static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 spin_lock(&clp->cl_lock);
536 if (time_before(clp->cl_last_renewal,timestamp))
537 clp->cl_last_renewal = timestamp;
538 spin_unlock(&clp->cl_lock);
539}
540
Trond Myklebust452e9352010-07-31 14:29:06 -0400541static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
542{
Trond Myklebustbe824162015-07-05 14:50:46 -0400543 struct nfs_client *clp = server->nfs_client;
544
545 if (!nfs4_has_session(clp))
546 do_renew_lease(clp, timestamp);
Trond Myklebust452e9352010-07-31 14:29:06 -0400547}
548
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400549struct nfs4_call_sync_data {
550 const struct nfs_server *seq_server;
551 struct nfs4_sequence_args *seq_args;
552 struct nfs4_sequence_res *seq_res;
553};
554
Trond Myklebustbe3a5d22015-06-23 19:51:55 +0800555void nfs4_init_sequence(struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res, int cache_reply)
Chuck Levera9c92d62013-08-09 12:48:18 -0400557{
558 args->sa_slot = NULL;
559 args->sa_cache_this = cache_reply;
560 args->sa_privileged = 0;
561
562 res->sr_slot = NULL;
563}
564
565static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
566{
567 args->sa_privileged = 1;
568}
569
Peng Taocb04ad22014-06-11 05:24:15 +0800570int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
571 struct nfs4_sequence_args *args,
572 struct nfs4_sequence_res *res,
573 struct rpc_task *task)
Chuck Lever3bd23842013-08-09 12:49:19 -0400574{
Chuck Lever3bd23842013-08-09 12:49:19 -0400575 struct nfs4_slot *slot;
576
577 /* slot already allocated? */
578 if (res->sr_slot != NULL)
579 goto out_start;
580
581 spin_lock(&tbl->slot_tbl_lock);
582 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
583 goto out_sleep;
584
585 slot = nfs4_alloc_slot(tbl);
586 if (IS_ERR(slot)) {
587 if (slot == ERR_PTR(-ENOMEM))
588 task->tk_timeout = HZ >> 2;
589 goto out_sleep;
590 }
591 spin_unlock(&tbl->slot_tbl_lock);
592
593 args->sa_slot = slot;
594 res->sr_slot = slot;
595
596out_start:
597 rpc_call_start(task);
598 return 0;
599
600out_sleep:
601 if (args->sa_privileged)
602 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
603 NULL, RPC_PRIORITY_PRIVILEGED);
604 else
605 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
606 spin_unlock(&tbl->slot_tbl_lock);
607 return -EAGAIN;
608}
Peng Taocb04ad22014-06-11 05:24:15 +0800609EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
Chuck Lever3bd23842013-08-09 12:49:19 -0400610
611static int nfs40_sequence_done(struct rpc_task *task,
612 struct nfs4_sequence_res *res)
613{
614 struct nfs4_slot *slot = res->sr_slot;
615 struct nfs4_slot_table *tbl;
616
Trond Myklebustcab92c12014-01-29 12:12:15 -0500617 if (slot == NULL)
Chuck Lever3bd23842013-08-09 12:49:19 -0400618 goto out;
619
620 tbl = slot->table;
621 spin_lock(&tbl->slot_tbl_lock);
622 if (!nfs41_wake_and_assign_slot(tbl, slot))
623 nfs4_free_slot(tbl, slot);
624 spin_unlock(&tbl->slot_tbl_lock);
625
626 res->sr_slot = NULL;
627out:
628 return 1;
629}
630
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400631#if defined(CONFIG_NFS_V4_1)
632
Trond Myklebustd185a332010-06-16 09:52:25 -0400633static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
Andy Adamson13615872009-04-01 09:22:17 -0400634{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500635 struct nfs4_session *session;
Andy Adamson13615872009-04-01 09:22:17 -0400636 struct nfs4_slot_table *tbl;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500637 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500638 bool send_new_highest_used_slotid = false;
Andy Adamson13615872009-04-01 09:22:17 -0400639
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500640 tbl = slot->table;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500641 session = tbl->session;
Andy Adamsonea028ac2009-12-04 15:55:38 -0500642
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500643 spin_lock(&tbl->slot_tbl_lock);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500644 /* Be nice to the server: try to ensure that the last transmitted
645 * value for highest_user_slotid <= target_highest_slotid
646 */
647 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
648 send_new_highest_used_slotid = true;
649
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500650 if (nfs41_wake_and_assign_slot(tbl, slot)) {
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500651 send_new_highest_used_slotid = false;
652 goto out_unlock;
653 }
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500654 nfs4_free_slot(tbl, slot);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500655
656 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
657 send_new_highest_used_slotid = false;
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500658out_unlock:
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500659 spin_unlock(&tbl->slot_tbl_lock);
Benny Halevydfb4f3092010-09-24 09:17:01 -0400660 res->sr_slot = NULL;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500661 if (send_new_highest_used_slotid)
Anna Schumaker3f10a6a2015-07-13 14:01:31 -0400662 nfs41_notify_server(session->clp);
Andy Adamson13615872009-04-01 09:22:17 -0400663}
664
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500665int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Andy Adamsonb0df8062009-04-01 09:22:18 -0400666{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500667 struct nfs4_session *session;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500668 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebust14516c32010-07-31 14:29:06 -0400669 struct nfs_client *clp;
Trond Myklebustac20d162012-12-15 15:36:07 -0500670 bool interrupted = false;
Trond Myklebust85563072012-12-11 10:31:12 -0500671 int ret = 1;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400672
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500673 if (slot == NULL)
674 goto out_noaction;
Bryan Schumaker468f8612011-04-18 15:57:32 -0400675 /* don't increment the sequence number if the task wasn't sent */
676 if (!RPC_WAS_SENT(task))
Andy Adamsonb0df8062009-04-01 09:22:18 -0400677 goto out;
678
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500679 session = slot->table->session;
Trond Myklebust933602e2012-11-16 12:12:38 -0500680
Trond Myklebustac20d162012-12-15 15:36:07 -0500681 if (slot->interrupted) {
682 slot->interrupted = 0;
683 interrupted = true;
684 }
685
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400686 trace_nfs4_sequence_done(session, res);
Andy Adamson691daf32009-12-04 15:55:39 -0500687 /* Check the SEQUENCE operation status */
Trond Myklebust14516c32010-07-31 14:29:06 -0400688 switch (res->sr_status) {
689 case 0:
Andy Adamsonb0df8062009-04-01 09:22:18 -0400690 /* Update the slot's sequence and clientid lease timer */
Trond Myklebust933602e2012-11-16 12:12:38 -0500691 ++slot->seq_nr;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500692 clp = session->clp;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500693 do_renew_lease(clp, res->sr_timestamp);
Alexandros Batsakis0629e372009-12-05 13:46:14 -0500694 /* Check sequence flags */
Trond Myklebustb15c7cd2015-07-05 15:01:36 -0400695 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
Trond Myklebust464ee9f2012-11-20 12:49:27 -0500696 nfs41_update_target_slotid(slot->table, slot, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400697 break;
Trond Myklebustac20d162012-12-15 15:36:07 -0500698 case 1:
699 /*
700 * sr_status remains 1 if an RPC level error occurred.
701 * The server may or may not have processed the sequence
702 * operation..
703 * Mark the slot as having hosted an interrupted RPC call.
704 */
705 slot->interrupted = 1;
706 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400707 case -NFS4ERR_DELAY:
708 /* The server detected a resend of the RPC call and
709 * returned NFS4ERR_DELAY as per Section 2.10.6.2
710 * of RFC5661.
711 */
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500712 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400713 __func__,
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500714 slot->slot_nr,
Trond Myklebust933602e2012-11-16 12:12:38 -0500715 slot->seq_nr);
Trond Myklebust14516c32010-07-31 14:29:06 -0400716 goto out_retry;
Trond Myklebust85563072012-12-11 10:31:12 -0500717 case -NFS4ERR_BADSLOT:
718 /*
719 * The slot id we used was probably retired. Try again
720 * using a different slot id.
721 */
Trond Myklebuste8794442012-12-15 13:56:18 -0500722 goto retry_nowait;
723 case -NFS4ERR_SEQ_MISORDERED:
724 /*
Trond Myklebustac20d162012-12-15 15:36:07 -0500725 * Was the last operation on this sequence interrupted?
726 * If so, retry after bumping the sequence number.
727 */
728 if (interrupted) {
729 ++slot->seq_nr;
730 goto retry_nowait;
731 }
732 /*
Trond Myklebuste8794442012-12-15 13:56:18 -0500733 * Could this slot have been previously retired?
734 * If so, then the server may be expecting seq_nr = 1!
735 */
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500736 if (slot->seq_nr != 1) {
737 slot->seq_nr = 1;
738 goto retry_nowait;
739 }
740 break;
Trond Myklebuste8794442012-12-15 13:56:18 -0500741 case -NFS4ERR_SEQ_FALSE_RETRY:
742 ++slot->seq_nr;
743 goto retry_nowait;
Trond Myklebust14516c32010-07-31 14:29:06 -0400744 default:
745 /* Just update the slot sequence no. */
Trond Myklebust933602e2012-11-16 12:12:38 -0500746 ++slot->seq_nr;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400747 }
748out:
749 /* The session may be reset by one of the error handlers. */
750 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
Trond Myklebustd185a332010-06-16 09:52:25 -0400751 nfs41_sequence_free_slot(res);
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500752out_noaction:
Trond Myklebust85563072012-12-11 10:31:12 -0500753 return ret;
Trond Myklebuste8794442012-12-15 13:56:18 -0500754retry_nowait:
755 if (rpc_restart_call_prepare(task)) {
756 task->tk_status = 0;
757 ret = 0;
758 }
759 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400760out_retry:
Trond Myklebustd05dd4e2010-07-31 14:29:07 -0400761 if (!rpc_restart_call(task))
Trond Myklebust14516c32010-07-31 14:29:06 -0400762 goto out;
763 rpc_delay(task, NFS4_POLL_RETRY_MAX);
764 return 0;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400765}
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500766EXPORT_SYMBOL_GPL(nfs41_sequence_done);
Andy Adamsonb0df8062009-04-01 09:22:18 -0400767
Peng Tao2c4b1312014-06-11 05:24:16 +0800768int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400769{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500770 if (res->sr_slot == NULL)
Trond Myklebust14516c32010-07-31 14:29:06 -0400771 return 1;
Chuck Lever3bd23842013-08-09 12:49:19 -0400772 if (!res->sr_slot->table->session)
773 return nfs40_sequence_done(task, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400774 return nfs41_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400775}
Peng Tao2c4b1312014-06-11 05:24:16 +0800776EXPORT_SYMBOL_GPL(nfs4_sequence_done);
Trond Myklebustdf896452010-06-16 09:52:26 -0400777
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000778int nfs41_setup_sequence(struct nfs4_session *session,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400781 struct rpc_task *task)
782{
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400783 struct nfs4_slot *slot;
784 struct nfs4_slot_table *tbl;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400785
786 dprintk("--> %s\n", __func__);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400787 /* slot already allocated? */
Benny Halevydfb4f3092010-09-24 09:17:01 -0400788 if (res->sr_slot != NULL)
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400789 goto out_success;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400790
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400791 tbl = &session->fc_slot_table;
792
Trond Myklebust69d206b2012-11-22 13:21:02 -0500793 task->tk_timeout = 0;
794
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400795 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson774d5f12013-05-20 14:13:50 -0400796 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400797 !args->sa_privileged) {
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500798 /* The state manager will wait until the slot table is empty */
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500799 dprintk("%s session is draining\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400800 goto out_sleep;
Andy Adamsonb069d942009-04-01 09:22:43 -0400801 }
802
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500803 slot = nfs4_alloc_slot(tbl);
Trond Myklebust69d206b2012-11-22 13:21:02 -0500804 if (IS_ERR(slot)) {
805 /* If out of memory, try again in 1/4 second */
806 if (slot == ERR_PTR(-ENOMEM))
807 task->tk_timeout = HZ >> 2;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400808 dprintk("<-- %s: no free slots\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400809 goto out_sleep;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400810 }
811 spin_unlock(&tbl->slot_tbl_lock);
812
Trond Myklebust2b2fa712012-11-16 12:58:36 -0500813 args->sa_slot = slot;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400814
Chuck Levere8d92382013-08-09 12:47:51 -0400815 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500816 slot->slot_nr, slot->seq_nr);
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400817
Benny Halevydfb4f3092010-09-24 09:17:01 -0400818 res->sr_slot = slot;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500819 res->sr_timestamp = jiffies;
Trond Myklebust2a6e26c2010-06-16 09:52:25 -0400820 res->sr_status_flags = 0;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400821 /*
822 * sr_status is only set in decode_sequence, and so will remain
823 * set to 1 if an rpc level failure occurs.
824 */
825 res->sr_status = 1;
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400826 trace_nfs4_setup_sequence(session, args);
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400827out_success:
828 rpc_call_start(task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400829 return 0;
Trond Myklebust7b939a32012-11-01 15:19:46 -0400830out_sleep:
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400831 /* Privileged tasks are queued with top priority */
832 if (args->sa_privileged)
Trond Myklebust1e1093c2012-11-01 16:44:05 -0400833 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
834 NULL, RPC_PRIORITY_PRIVILEGED);
835 else
836 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400837 spin_unlock(&tbl->slot_tbl_lock);
838 return -EAGAIN;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400839}
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000840EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400841
Chuck Lever5a580e02013-08-09 12:48:09 -0400842static int nfs4_setup_sequence(const struct nfs_server *server,
843 struct nfs4_sequence_args *args,
844 struct nfs4_sequence_res *res,
845 struct rpc_task *task)
Andy Adamsonce5039c2009-04-01 09:22:13 -0400846{
Trond Myklebust035168a2010-06-16 09:52:26 -0400847 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400848 int ret = 0;
849
Chuck Lever3bd23842013-08-09 12:49:19 -0400850 if (!session)
Peng Taocb04ad22014-06-11 05:24:15 +0800851 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
852 args, res, task);
Trond Myklebust035168a2010-06-16 09:52:26 -0400853
Chuck Levere8d92382013-08-09 12:47:51 -0400854 dprintk("--> %s clp %p session %p sr_slot %u\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400855 __func__, session->clp, session, res->sr_slot ?
Chuck Levere8d92382013-08-09 12:47:51 -0400856 res->sr_slot->slot_nr : NFS4_NO_SLOT);
Trond Myklebust035168a2010-06-16 09:52:26 -0400857
Trond Myklebust9d12b212012-01-17 22:04:25 -0500858 ret = nfs41_setup_sequence(session, args, res, task);
Chuck Lever3bd23842013-08-09 12:49:19 -0400859
Andy Adamsonce5039c2009-04-01 09:22:13 -0400860 dprintk("<-- %s status=%d\n", __func__, ret);
861 return ret;
862}
863
Andy Adamsonce5039c2009-04-01 09:22:13 -0400864static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
865{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400866 struct nfs4_call_sync_data *data = calldata;
Trond Myklebust6ba7db32012-10-22 20:07:20 -0400867 struct nfs4_session *session = nfs4_get_session(data->seq_server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400868
Trond Myklebust035168a2010-06-16 09:52:26 -0400869 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
870
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400871 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400872}
873
Andy Adamson69ab40c2009-04-01 09:22:19 -0400874static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
875{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400876 struct nfs4_call_sync_data *data = calldata;
Andy Adamson69ab40c2009-04-01 09:22:19 -0400877
Trond Myklebust14516c32010-07-31 14:29:06 -0400878 nfs41_sequence_done(task, data->seq_res);
Andy Adamson69ab40c2009-04-01 09:22:19 -0400879}
880
Trond Myklebust17280172012-03-11 13:11:00 -0400881static const struct rpc_call_ops nfs41_call_sync_ops = {
Andy Adamsonce5039c2009-04-01 09:22:13 -0400882 .rpc_call_prepare = nfs41_call_sync_prepare,
Andy Adamson69ab40c2009-04-01 09:22:19 -0400883 .rpc_call_done = nfs41_call_sync_done,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400884};
885
Chuck Lever3bd23842013-08-09 12:49:19 -0400886#else /* !CONFIG_NFS_V4_1 */
887
Chuck Lever5a580e02013-08-09 12:48:09 -0400888static int nfs4_setup_sequence(const struct nfs_server *server,
889 struct nfs4_sequence_args *args,
890 struct nfs4_sequence_res *res,
891 struct rpc_task *task)
892{
Peng Taocb04ad22014-06-11 05:24:15 +0800893 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
894 args, res, task);
Chuck Lever5a580e02013-08-09 12:48:09 -0400895}
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400896
Peng Tao2c4b1312014-06-11 05:24:16 +0800897int nfs4_sequence_done(struct rpc_task *task,
898 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400899{
Chuck Lever3bd23842013-08-09 12:49:19 -0400900 return nfs40_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400901}
Peng Tao2c4b1312014-06-11 05:24:16 +0800902EXPORT_SYMBOL_GPL(nfs4_sequence_done);
Chuck Lever3bd23842013-08-09 12:49:19 -0400903
904#endif /* !CONFIG_NFS_V4_1 */
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400905
Chuck Lever9915ea72013-08-09 12:48:27 -0400906static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
907{
908 struct nfs4_call_sync_data *data = calldata;
909 nfs4_setup_sequence(data->seq_server,
910 data->seq_args, data->seq_res, task);
911}
912
913static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
914{
915 struct nfs4_call_sync_data *data = calldata;
916 nfs4_sequence_done(task, data->seq_res);
917}
918
919static const struct rpc_call_ops nfs40_call_sync_ops = {
920 .rpc_call_prepare = nfs40_call_sync_prepare,
921 .rpc_call_done = nfs40_call_sync_done,
922};
923
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400924static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
Trond Myklebustad389da2007-06-05 12:30:00 -0400925 struct nfs_server *server,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500926 struct rpc_message *msg,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100927 struct nfs4_sequence_args *args,
928 struct nfs4_sequence_res *res)
Trond Myklebustad389da2007-06-05 12:30:00 -0400929{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100930 int ret;
931 struct rpc_task *task;
Chuck Lever9915ea72013-08-09 12:48:27 -0400932 struct nfs_client *clp = server->nfs_client;
933 struct nfs4_call_sync_data data = {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100934 .seq_server = server,
935 .seq_args = args,
936 .seq_res = res,
937 };
938 struct rpc_task_setup task_setup = {
939 .rpc_client = clnt,
940 .rpc_message = msg,
Chuck Lever9915ea72013-08-09 12:48:27 -0400941 .callback_ops = clp->cl_mvops->call_sync_ops,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100942 .callback_data = &data
943 };
944
945 task = rpc_run_task(&task_setup);
946 if (IS_ERR(task))
947 ret = PTR_ERR(task);
948 else {
949 ret = task->tk_status;
Trond Myklebustad389da2007-06-05 12:30:00 -0400950 rpc_put_task(task);
951 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100952 return ret;
953}
954
Bryan Schumaker7c513052011-03-24 17:12:24 +0000955int nfs4_call_sync(struct rpc_clnt *clnt,
956 struct nfs_server *server,
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000957 struct rpc_message *msg,
958 struct nfs4_sequence_args *args,
959 struct nfs4_sequence_res *res,
960 int cache_reply)
961{
Chuck Levera9c92d62013-08-09 12:48:18 -0400962 nfs4_init_sequence(args, res, cache_reply);
Chuck Lever9915ea72013-08-09 12:48:27 -0400963 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000964}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
966static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
967{
968 struct nfs_inode *nfsi = NFS_I(dir);
969
970 spin_lock(&dir->i_lock);
Trond Myklebust359d7d12012-05-28 10:01:34 -0400971 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700972 if (!cinfo->atomic || cinfo->before != dir->i_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 nfs_force_lookup_revalidate(dir);
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700974 dir->i_version = cinfo->after;
Trond Myklebust3235b402015-02-26 19:52:06 -0500975 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
David Howellsde242c02012-12-20 21:52:38 +0000976 nfs_fscache_invalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 spin_unlock(&dir->i_lock);
978}
979
980struct nfs4_opendata {
981 struct kref kref;
982 struct nfs_openargs o_arg;
983 struct nfs_openres o_res;
984 struct nfs_open_confirmargs c_arg;
985 struct nfs_open_confirmres c_res;
Trond Myklebust6926afd2012-01-07 13:22:46 -0500986 struct nfs4_string owner_name;
987 struct nfs4_string group_name;
Kinglong Meea49c2692015-07-27 15:31:38 +0800988 struct nfs4_label *a_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 struct nfs_fattr f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400990 struct nfs4_label *f_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 struct dentry *dir;
Al Viro82a2c1b2011-06-22 18:30:55 -0400992 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 struct nfs4_state_owner *owner;
994 struct nfs4_state *state;
995 struct iattr attrs;
996 unsigned long timestamp;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400997 unsigned int rpc_done : 1;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -0400998 unsigned int file_created : 1;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -0400999 unsigned int is_recover : 1;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001000 int rpc_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 int cancelled;
1002};
Trond Myklebustdecf4912005-10-27 22:12:39 -04001003
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001004static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1005 int err, struct nfs4_exception *exception)
1006{
1007 if (err != -EINVAL)
1008 return false;
1009 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1010 return false;
1011 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1012 exception->retry = 1;
1013 return true;
1014}
1015
Trond Myklebust6ae37332015-01-30 14:21:14 -05001016static u32
1017nfs4_map_atomic_open_share(struct nfs_server *server,
1018 fmode_t fmode, int openflags)
1019{
1020 u32 res = 0;
1021
1022 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1023 case FMODE_READ:
1024 res = NFS4_SHARE_ACCESS_READ;
1025 break;
1026 case FMODE_WRITE:
1027 res = NFS4_SHARE_ACCESS_WRITE;
1028 break;
1029 case FMODE_READ|FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_BOTH;
1031 }
1032 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1033 goto out;
1034 /* Want no delegation if we're using O_DIRECT */
1035 if (openflags & O_DIRECT)
1036 res |= NFS4_SHARE_WANT_NO_DELEG;
1037out:
1038 return res;
1039}
1040
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001041static enum open_claim_type4
1042nfs4_map_atomic_open_claim(struct nfs_server *server,
1043 enum open_claim_type4 claim)
1044{
1045 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1046 return claim;
1047 switch (claim) {
1048 default:
1049 return claim;
1050 case NFS4_OPEN_CLAIM_FH:
1051 return NFS4_OPEN_CLAIM_NULL;
1052 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1053 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1054 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1055 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1056 }
1057}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
1059static void nfs4_init_opendata_res(struct nfs4_opendata *p)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001060{
1061 p->o_res.f_attr = &p->f_attr;
David Quigley1775fd32013-05-22 12:50:42 -04001062 p->o_res.f_label = p->f_label;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001063 p->o_res.seqid = p->o_arg.seqid;
1064 p->c_res.seqid = p->c_arg.seqid;
1065 p->o_res.server = p->o_arg.server;
Andy Adamson5f657532012-10-03 02:39:34 -04001066 p->o_res.access_request = p->o_arg.access;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001067 nfs_fattr_init(&p->f_attr);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001068 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001069}
1070
Al Viro82a2c1b2011-06-22 18:30:55 -04001071static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001072 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001073 const struct iattr *attrs,
David Quigley1775fd32013-05-22 12:50:42 -04001074 struct nfs4_label *label,
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001075 enum open_claim_type4 claim,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001076 gfp_t gfp_mask)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001077{
Al Viro82a2c1b2011-06-22 18:30:55 -04001078 struct dentry *parent = dget_parent(dentry);
David Howells2b0143b2015-03-17 22:25:59 +00001079 struct inode *dir = d_inode(parent);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001080 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust63f5f792015-01-23 19:19:25 -05001081 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001082 struct nfs4_opendata *p;
1083
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001084 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001085 if (p == NULL)
1086 goto err;
David Quigley14c43f72013-05-22 12:50:43 -04001087
1088 p->f_label = nfs4_label_alloc(server, gfp_mask);
1089 if (IS_ERR(p->f_label))
1090 goto err_free_p;
1091
Kinglong Meea49c2692015-07-27 15:31:38 +08001092 p->a_label = nfs4_label_alloc(server, gfp_mask);
1093 if (IS_ERR(p->a_label))
1094 goto err_free_f;
1095
Trond Myklebust63f5f792015-01-23 19:19:25 -05001096 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1097 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05001098 if (IS_ERR(p->o_arg.seqid))
David Quigley14c43f72013-05-22 12:50:43 -04001099 goto err_free_label;
Al Viro82a2c1b2011-06-22 18:30:55 -04001100 nfs_sb_active(dentry->d_sb);
1101 p->dentry = dget(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001102 p->dir = parent;
1103 p->owner = sp;
1104 atomic_inc(&sp->so_count);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001105 p->o_arg.open_flags = flags;
1106 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
Trond Myklebust6ae37332015-01-30 14:21:14 -05001107 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1108 fmode, flags);
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001109 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1110 * will return permission denied for all bits until close */
1111 if (!(flags & O_EXCL)) {
1112 /* ask server to check for all possible rights as results
1113 * are cached */
1114 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1115 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001116 }
David Howells7539bba2006-08-22 20:06:09 -04001117 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001118 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1119 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
Al Viro82a2c1b2011-06-22 18:30:55 -04001120 p->o_arg.name = &dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001121 p->o_arg.server = server;
David Quigleyaa9c2662013-05-22 12:50:44 -04001122 p->o_arg.bitmask = nfs4_bitmask(server, label);
Trond Myklebust1549210f2012-06-05 09:16:47 -04001123 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
Kinglong Meea49c2692015-07-27 15:31:38 +08001124 p->o_arg.label = nfs4_label_copy(p->a_label, label);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001125 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1126 switch (p->o_arg.claim) {
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001127 case NFS4_OPEN_CLAIM_NULL:
1128 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1129 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1130 p->o_arg.fh = NFS_FH(dir);
1131 break;
1132 case NFS4_OPEN_CLAIM_PREVIOUS:
1133 case NFS4_OPEN_CLAIM_FH:
1134 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1135 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
David Howells2b0143b2015-03-17 22:25:59 +00001136 p->o_arg.fh = NFS_FH(d_inode(dentry));
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001137 }
Trond Myklebust536e43d2012-01-17 22:04:26 -05001138 if (attrs != NULL && attrs->ia_valid != 0) {
Trond Myklebustc281fa9c2013-08-20 21:06:49 -04001139 __u32 verf[2];
Trond Myklebustd77d76f2010-06-16 09:52:27 -04001140
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001141 p->o_arg.u.attrs = &p->attrs;
1142 memcpy(&p->attrs, attrs, sizeof(p->attrs));
Chuck Levercd937102012-03-02 17:14:31 -05001143
1144 verf[0] = jiffies;
1145 verf[1] = current->pid;
1146 memcpy(p->o_arg.u.verifier.data, verf,
1147 sizeof(p->o_arg.u.verifier.data));
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001148 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001149 p->c_arg.fh = &p->o_res.fh;
1150 p->c_arg.stateid = &p->o_res.stateid;
1151 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001152 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001153 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001154 return p;
David Quigley14c43f72013-05-22 12:50:43 -04001155
1156err_free_label:
Kinglong Meea49c2692015-07-27 15:31:38 +08001157 nfs4_label_free(p->a_label);
1158err_free_f:
David Quigley14c43f72013-05-22 12:50:43 -04001159 nfs4_label_free(p->f_label);
1160err_free_p:
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001161 kfree(p);
1162err:
1163 dput(parent);
1164 return NULL;
1165}
1166
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001167static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001168{
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001169 struct nfs4_opendata *p = container_of(kref,
1170 struct nfs4_opendata, kref);
Al Viro82a2c1b2011-06-22 18:30:55 -04001171 struct super_block *sb = p->dentry->d_sb;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001172
1173 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001174 if (p->state != NULL)
1175 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001176 nfs4_put_state_owner(p->owner);
David Quigley14c43f72013-05-22 12:50:43 -04001177
Kinglong Meea49c2692015-07-27 15:31:38 +08001178 nfs4_label_free(p->a_label);
David Quigley14c43f72013-05-22 12:50:43 -04001179 nfs4_label_free(p->f_label);
1180
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001181 dput(p->dir);
Al Viro82a2c1b2011-06-22 18:30:55 -04001182 dput(p->dentry);
1183 nfs_sb_deactive(sb);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001184 nfs_fattr_free_names(&p->f_attr);
Trond Myklebuste911b812014-03-26 13:24:37 -07001185 kfree(p->f_attr.mdsthreshold);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001186 kfree(p);
1187}
1188
1189static void nfs4_opendata_put(struct nfs4_opendata *p)
1190{
1191 if (p != NULL)
1192 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001193}
1194
Trond Myklebust06f814a2006-01-03 09:55:07 +01001195static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1196{
Trond Myklebust06f814a2006-01-03 09:55:07 +01001197 int ret;
1198
Trond Myklebust06f814a2006-01-03 09:55:07 +01001199 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +01001200 return ret;
1201}
1202
Trond Myklebust24311f82015-09-20 10:50:17 -04001203static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1204 fmode_t fmode)
1205{
1206 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1207 case FMODE_READ|FMODE_WRITE:
1208 return state->n_rdwr != 0;
1209 case FMODE_WRITE:
1210 return state->n_wronly != 0;
1211 case FMODE_READ:
1212 return state->n_rdonly != 0;
1213 }
1214 WARN_ON_ONCE(1);
1215 return false;
1216}
1217
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001218static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
Trond Myklebust6ee41262007-07-08 14:11:36 -04001219{
1220 int ret = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001221
Trond Myklebust536e43d2012-01-17 22:04:26 -05001222 if (open_mode & (O_EXCL|O_TRUNC))
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001223 goto out;
1224 switch (mode & (FMODE_READ|FMODE_WRITE)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001225 case FMODE_READ:
Trond Myklebust88069f72009-12-08 08:33:16 -05001226 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1227 && state->n_rdonly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001228 break;
1229 case FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001230 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1231 && state->n_wronly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001232 break;
1233 case FMODE_READ|FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001234 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1235 && state->n_rdwr != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001236 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001237out:
Trond Myklebust6ee41262007-07-08 14:11:36 -04001238 return ret;
1239}
1240
Trond Myklebust2a606182015-08-19 22:30:00 -05001241static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1242 enum open_claim_type4 claim)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001243{
Trond Myklebust652f89f2011-12-09 19:05:58 -05001244 if (delegation == NULL)
1245 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001246 if ((delegation->type & fmode) != fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001247 return 0;
Trond Myklebustd25be542013-02-05 11:43:28 -05001248 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1249 return 0;
Trond Myklebust2a606182015-08-19 22:30:00 -05001250 switch (claim) {
1251 case NFS4_OPEN_CLAIM_NULL:
1252 case NFS4_OPEN_CLAIM_FH:
1253 break;
1254 case NFS4_OPEN_CLAIM_PREVIOUS:
1255 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1256 break;
1257 default:
1258 return 0;
1259 }
Trond Myklebustb7391f42008-12-23 15:21:52 -05001260 nfs_mark_delegation_referenced(delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001261 return 1;
1262}
1263
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001264static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
Trond Myklebuste7616922006-01-03 09:55:13 +01001265{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001266 switch (fmode) {
Trond Myklebuste7616922006-01-03 09:55:13 +01001267 case FMODE_WRITE:
1268 state->n_wronly++;
1269 break;
1270 case FMODE_READ:
1271 state->n_rdonly++;
1272 break;
1273 case FMODE_READ|FMODE_WRITE:
1274 state->n_rdwr++;
1275 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001276 nfs4_state_set_mode_locked(state, state->state | fmode);
Trond Myklebuste7616922006-01-03 09:55:13 +01001277}
1278
Trond Myklebust4f14c192014-02-12 19:15:06 -05001279static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
Trond Myklebust003707c2007-07-05 18:07:55 -04001280{
Trond Myklebust4f14c192014-02-12 19:15:06 -05001281 struct nfs_client *clp = state->owner->so_server->nfs_client;
1282 bool need_recover = false;
1283
1284 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1285 need_recover = true;
1286 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1287 need_recover = true;
1288 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1289 need_recover = true;
1290 if (need_recover)
1291 nfs4_state_mark_reclaim_nograce(clp, state);
1292}
1293
Trond Myklebuste999e802014-02-10 18:20:47 -05001294static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1295 nfs4_stateid *stateid)
1296{
1297 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1298 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001299 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1300 nfs_test_and_clear_all_open_stateid(state);
Trond Myklebuste999e802014-02-10 18:20:47 -05001301 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001302 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001303 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1304 return true;
1305 return false;
1306}
1307
Trond Myklebustf95549c2015-01-23 18:06:09 -05001308static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1309{
Trond Myklebust3c38cbe2015-07-22 13:46:13 -04001310 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1311 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001312 if (state->n_wronly)
1313 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1314 if (state->n_rdonly)
1315 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1316 if (state->n_rdwr)
1317 set_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebust3c38cbe2015-07-22 13:46:13 -04001318 set_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebustf95549c2015-01-23 18:06:09 -05001319}
1320
Trond Myklebust226056c2014-02-11 10:41:07 -05001321static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001322 nfs4_stateid *arg_stateid,
Trond Myklebust226056c2014-02-11 10:41:07 -05001323 nfs4_stateid *stateid, fmode_t fmode)
1324{
1325 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1326 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1327 case FMODE_WRITE:
1328 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1329 break;
1330 case FMODE_READ:
1331 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1332 break;
1333 case 0:
1334 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1335 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1336 clear_bit(NFS_OPEN_STATE, &state->flags);
1337 }
1338 if (stateid == NULL)
1339 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001340 /* Handle races with OPEN */
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001341 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1342 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1343 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
Trond Myklebustf95549c2015-01-23 18:06:09 -05001344 nfs_resync_open_stateid_locked(state);
Trond Myklebust226056c2014-02-11 10:41:07 -05001345 return;
Trond Myklebustf95549c2015-01-23 18:06:09 -05001346 }
Trond Myklebust003707c2007-07-05 18:07:55 -04001347 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001348 nfs4_stateid_copy(&state->stateid, stateid);
1349 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust226056c2014-02-11 10:41:07 -05001350}
1351
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001352static void nfs_clear_open_stateid(struct nfs4_state *state,
1353 nfs4_stateid *arg_stateid,
1354 nfs4_stateid *stateid, fmode_t fmode)
Trond Myklebust226056c2014-02-11 10:41:07 -05001355{
1356 write_seqlock(&state->seqlock);
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07001357 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
Trond Myklebust226056c2014-02-11 10:41:07 -05001358 write_sequnlock(&state->seqlock);
Trond Myklebust4f14c192014-02-12 19:15:06 -05001359 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1360 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust226056c2014-02-11 10:41:07 -05001361}
1362
Trond Myklebust003707c2007-07-05 18:07:55 -04001363static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1364{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001365 switch (fmode) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001366 case FMODE_READ:
1367 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1368 break;
1369 case FMODE_WRITE:
1370 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_READ|FMODE_WRITE:
1373 set_bit(NFS_O_RDWR_STATE, &state->flags);
1374 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001375 if (!nfs_need_update_open_stateid(state, stateid))
1376 return;
1377 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1378 nfs4_stateid_copy(&state->stateid, stateid);
1379 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001380}
1381
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001382static 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 -07001383{
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001384 /*
1385 * Protect the call to nfs4_state_set_mode_locked and
1386 * serialise the stateid update
1387 */
1388 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001389 if (deleg_stateid != NULL) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001390 nfs4_stateid_copy(&state->stateid, deleg_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001391 set_bit(NFS_DELEGATED_STATE, &state->flags);
1392 }
1393 if (open_stateid != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001394 nfs_set_open_stateid_locked(state, open_stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001395 write_sequnlock(&state->seqlock);
1396 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001397 update_open_stateflags(state, fmode);
Trond Myklebustec073422005-10-20 14:22:47 -07001398 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399}
1400
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001401static 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 -05001402{
1403 struct nfs_inode *nfsi = NFS_I(state->inode);
1404 struct nfs_delegation *deleg_cur;
1405 int ret = 0;
1406
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001407 fmode &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust34310432008-12-23 15:21:38 -05001408
1409 rcu_read_lock();
1410 deleg_cur = rcu_dereference(nfsi->delegation);
1411 if (deleg_cur == NULL)
1412 goto no_delegation;
1413
1414 spin_lock(&deleg_cur->lock);
Trond Myklebust17f26b12013-08-21 15:48:42 -04001415 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
Trond Myklebustd25be542013-02-05 11:43:28 -05001416 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001417 (deleg_cur->type & fmode) != fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001418 goto no_delegation_unlock;
1419
1420 if (delegation == NULL)
1421 delegation = &deleg_cur->stateid;
Trond Myklebustf597c532012-03-04 18:13:56 -05001422 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
Trond Myklebust34310432008-12-23 15:21:38 -05001423 goto no_delegation_unlock;
1424
Trond Myklebustb7391f42008-12-23 15:21:52 -05001425 nfs_mark_delegation_referenced(deleg_cur);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001426 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001427 ret = 1;
1428no_delegation_unlock:
1429 spin_unlock(&deleg_cur->lock);
1430no_delegation:
1431 rcu_read_unlock();
1432
1433 if (!ret && open_stateid != NULL) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001434 __update_open_stateid(state, open_stateid, NULL, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001435 ret = 1;
1436 }
Trond Myklebust4f14c192014-02-12 19:15:06 -05001437 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1438 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust34310432008-12-23 15:21:38 -05001439
1440 return ret;
1441}
1442
Trond Myklebust39071e62015-01-24 15:07:56 -05001443static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1444 const nfs4_stateid *stateid)
1445{
1446 struct nfs4_state *state = lsp->ls_state;
1447 bool ret = false;
1448
1449 spin_lock(&state->state_lock);
1450 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1451 goto out_noupdate;
1452 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1453 goto out_noupdate;
1454 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1455 ret = true;
1456out_noupdate:
1457 spin_unlock(&state->state_lock);
1458 return ret;
1459}
Trond Myklebust34310432008-12-23 15:21:38 -05001460
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001461static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001462{
1463 struct nfs_delegation *delegation;
1464
1465 rcu_read_lock();
1466 delegation = rcu_dereference(NFS_I(inode)->delegation);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001467 if (delegation == NULL || (delegation->type & fmode) == fmode) {
Trond Myklebustaac00a82007-07-05 19:02:21 -04001468 rcu_read_unlock();
1469 return;
1470 }
1471 rcu_read_unlock();
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04001472 nfs4_inode_return_delegation(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001473}
1474
Trond Myklebust6ee41262007-07-08 14:11:36 -04001475static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001476{
1477 struct nfs4_state *state = opendata->state;
1478 struct nfs_inode *nfsi = NFS_I(state->inode);
1479 struct nfs_delegation *delegation;
Trond Myklebustf448bad2013-05-29 15:36:40 -04001480 int open_mode = opendata->o_arg.open_flags;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001481 fmode_t fmode = opendata->o_arg.fmode;
Trond Myklebust2a606182015-08-19 22:30:00 -05001482 enum open_claim_type4 claim = opendata->o_arg.claim;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001483 nfs4_stateid stateid;
1484 int ret = -EAGAIN;
1485
Trond Myklebustaac00a82007-07-05 19:02:21 -04001486 for (;;) {
Anna Schumaker61beef752014-09-03 14:15:40 -04001487 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001488 if (can_open_cached(state, fmode, open_mode)) {
Anna Schumaker61beef752014-09-03 14:15:40 -04001489 update_open_stateflags(state, fmode);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001490 spin_unlock(&state->owner->so_lock);
Anna Schumaker61beef752014-09-03 14:15:40 -04001491 goto out_return_state;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001492 }
Anna Schumaker61beef752014-09-03 14:15:40 -04001493 spin_unlock(&state->owner->so_lock);
Trond Myklebust34310432008-12-23 15:21:38 -05001494 rcu_read_lock();
1495 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebust2a606182015-08-19 22:30:00 -05001496 if (!can_open_delegated(delegation, fmode, claim)) {
Trond Myklebust34310432008-12-23 15:21:38 -05001497 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001498 break;
Trond Myklebust34310432008-12-23 15:21:38 -05001499 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001500 /* Save the delegation */
Trond Myklebustf597c532012-03-04 18:13:56 -05001501 nfs4_stateid_copy(&stateid, &delegation->stateid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001502 rcu_read_unlock();
Trond Myklebustfa332942013-04-09 12:56:52 -04001503 nfs_release_seqid(opendata->o_arg.seqid);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001504 if (!opendata->is_recover) {
1505 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1506 if (ret != 0)
1507 goto out;
1508 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001509 ret = -EAGAIN;
Trond Myklebust34310432008-12-23 15:21:38 -05001510
1511 /* Try to update the stateid using the delegation */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001512 if (update_open_stateid(state, NULL, &stateid, fmode))
Trond Myklebust34310432008-12-23 15:21:38 -05001513 goto out_return_state;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001514 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001515out:
1516 return ERR_PTR(ret);
1517out_return_state:
1518 atomic_inc(&state->count);
1519 return state;
1520}
1521
Andy Adamsone23008e2012-10-02 21:07:32 -04001522static void
1523nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1524{
1525 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1526 struct nfs_delegation *delegation;
1527 int delegation_flags = 0;
1528
1529 rcu_read_lock();
1530 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1531 if (delegation)
1532 delegation_flags = delegation->flags;
1533 rcu_read_unlock();
Trond Myklebust72d79ff2015-10-02 11:44:54 -04001534 switch (data->o_arg.claim) {
1535 default:
1536 break;
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001539 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1540 "returning a delegation for "
1541 "OPEN(CLAIM_DELEGATE_CUR)\n",
1542 clp->cl_hostname);
Trond Myklebust72d79ff2015-10-02 11:44:54 -04001543 return;
1544 }
1545 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
Andy Adamsone23008e2012-10-02 21:07:32 -04001546 nfs_inode_set_delegation(state->inode,
1547 data->owner->so_cred,
1548 &data->o_res);
1549 else
1550 nfs_inode_reclaim_delegation(state->inode,
1551 data->owner->so_cred,
1552 &data->o_res);
1553}
1554
1555/*
1556 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1557 * and update the nfs4_state.
1558 */
1559static struct nfs4_state *
1560_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1561{
1562 struct inode *inode = data->state->inode;
1563 struct nfs4_state *state = data->state;
1564 int ret;
1565
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001566 if (!data->rpc_done) {
1567 if (data->rpc_status) {
1568 ret = data->rpc_status;
1569 goto err;
1570 }
1571 /* cached opens have already been processed */
1572 goto update;
Andy Adamsone23008e2012-10-02 21:07:32 -04001573 }
1574
Andy Adamsone23008e2012-10-02 21:07:32 -04001575 ret = nfs_refresh_inode(inode, &data->f_attr);
1576 if (ret)
1577 goto err;
1578
1579 if (data->o_res.delegation_type != 0)
1580 nfs4_opendata_check_deleg(data, state);
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001581update:
Andy Adamsone23008e2012-10-02 21:07:32 -04001582 update_open_stateid(state, &data->o_res.stateid, NULL,
1583 data->o_arg.fmode);
Trond Myklebustd49f0422013-10-28 14:57:12 -04001584 atomic_inc(&state->count);
Andy Adamsone23008e2012-10-02 21:07:32 -04001585
1586 return state;
1587err:
1588 return ERR_PTR(ret);
1589
1590}
1591
1592static struct nfs4_state *
1593_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001594{
1595 struct inode *inode;
1596 struct nfs4_state *state = NULL;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001597 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001598
Trond Myklebustaac00a82007-07-05 19:02:21 -04001599 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001600 state = nfs4_try_open_cached(data);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001601 goto out;
1602 }
1603
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001604 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001605 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001606 goto err;
David Quigley1775fd32013-05-22 12:50:42 -04001607 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001608 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -05001609 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001610 goto err;
1611 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001612 state = nfs4_get_open_state(inode, data->owner);
1613 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001614 goto err_put_inode;
Andy Adamsone23008e2012-10-02 21:07:32 -04001615 if (data->o_res.delegation_type != 0)
1616 nfs4_opendata_check_deleg(data, state);
Trond Myklebust34310432008-12-23 15:21:38 -05001617 update_open_stateid(state, &data->o_res.stateid, NULL,
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001618 data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001619 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001620out:
Trond Myklebust7aa262b52013-02-28 16:19:59 -08001621 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001622 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001623err_put_inode:
1624 iput(inode);
1625err:
1626 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001627}
1628
Andy Adamsone23008e2012-10-02 21:07:32 -04001629static struct nfs4_state *
1630nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1631{
1632 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1633 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1634 return _nfs4_opendata_to_nfs4_state(data);
1635}
1636
Trond Myklebust864472e2006-01-03 09:55:15 +01001637static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1638{
1639 struct nfs_inode *nfsi = NFS_I(state->inode);
1640 struct nfs_open_context *ctx;
1641
1642 spin_lock(&state->inode->i_lock);
1643 list_for_each_entry(ctx, &nfsi->open_files, list) {
1644 if (ctx->state != state)
1645 continue;
1646 get_nfs_open_context(ctx);
1647 spin_unlock(&state->inode->i_lock);
1648 return ctx;
1649 }
1650 spin_unlock(&state->inode->i_lock);
1651 return ERR_PTR(-ENOENT);
1652}
1653
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001654static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1655 struct nfs4_state *state, enum open_claim_type4 claim)
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001656{
1657 struct nfs4_opendata *opendata;
1658
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001659 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
David Quigley1775fd32013-05-22 12:50:42 -04001660 NULL, NULL, claim, GFP_NOFS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001661 if (opendata == NULL)
1662 return ERR_PTR(-ENOMEM);
1663 opendata->state = state;
1664 atomic_inc(&state->count);
1665 return opendata;
1666}
1667
Trond Myklebust24311f82015-09-20 10:50:17 -04001668static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1669 fmode_t fmode)
Trond Myklebust864472e2006-01-03 09:55:15 +01001670{
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001671 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001672 int ret;
1673
Trond Myklebust24311f82015-09-20 10:50:17 -04001674 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
NeilBrown39f897f2015-06-29 14:28:54 +10001675 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001676 opendata->o_arg.open_flags = 0;
1677 opendata->o_arg.fmode = fmode;
Trond Myklebustbe36e182015-02-27 17:04:17 -05001678 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1679 NFS_SB(opendata->dentry->d_sb),
1680 fmode, 0);
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001681 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1682 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1683 nfs4_init_opendata_res(opendata);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001684 ret = _nfs4_recover_proc_open(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001685 if (ret != 0)
1686 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001687 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001688 if (IS_ERR(newstate))
1689 return PTR_ERR(newstate);
Trond Myklebust24311f82015-09-20 10:50:17 -04001690 if (newstate != opendata->state)
1691 ret = -ESTALE;
Al Viro643168c2011-06-22 18:20:23 -04001692 nfs4_close_state(newstate, fmode);
Trond Myklebust24311f82015-09-20 10:50:17 -04001693 return ret;
Trond Myklebust864472e2006-01-03 09:55:15 +01001694}
1695
1696static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1697{
Trond Myklebust864472e2006-01-03 09:55:15 +01001698 int ret;
1699
Trond Myklebust4f14c192014-02-12 19:15:06 -05001700 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1701 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1702 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1703 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001704 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001705 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04001706 clear_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001707 smp_rmb();
Trond Myklebust24311f82015-09-20 10:50:17 -04001708 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1709 if (ret != 0)
1710 return ret;
1711 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1712 if (ret != 0)
1713 return ret;
1714 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1715 if (ret != 0)
1716 return ret;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001717 /*
1718 * We may have performed cached opens for all three recoveries.
1719 * Check if we need to update the current stateid.
1720 */
1721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
Trond Myklebustf597c532012-03-04 18:13:56 -05001722 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001723 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001724 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001725 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001726 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001727 }
Trond Myklebust864472e2006-01-03 09:55:15 +01001728 return 0;
1729}
1730
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731/*
1732 * OPEN_RECLAIM:
1733 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 */
Trond Myklebust539cd032007-06-05 11:46:42 -04001735static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001737 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +01001738 struct nfs4_opendata *opendata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001739 fmode_t delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 int status;
1741
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001742 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1743 NFS4_OPEN_CLAIM_PREVIOUS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001744 if (IS_ERR(opendata))
1745 return PTR_ERR(opendata);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001746 rcu_read_lock();
1747 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust15c831b2008-12-23 15:21:39 -05001748 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -04001749 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001750 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +01001751 opendata->o_arg.u.delegation_type = delegation_type;
1752 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001753 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 return status;
1755}
1756
Trond Myklebust539cd032007-06-05 11:46:42 -04001757static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758{
1759 struct nfs_server *server = NFS_SERVER(state->inode);
1760 struct nfs4_exception exception = { };
1761 int err;
1762 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04001763 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04001764 trace_nfs4_open_reclaim(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001765 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1766 continue;
Trond Myklebust168667c2010-10-19 19:47:49 -04001767 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00001768 break;
1769 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 } while (exception.retry);
1771 return err;
1772}
1773
Trond Myklebust864472e2006-01-03 09:55:15 +01001774static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1775{
1776 struct nfs_open_context *ctx;
1777 int ret;
1778
1779 ctx = nfs4_state_find_open_context(state);
1780 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04001781 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04001782 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001783 put_nfs_open_context(ctx);
1784 return ret;
1785}
1786
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001787static 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 -07001788{
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001789 switch (err) {
1790 default:
1791 printk(KERN_ERR "NFS: %s: unhandled error "
1792 "%d.\n", __func__, err);
1793 case 0:
1794 case -ENOENT:
Trond Myklebust8eee52a2015-06-04 13:51:13 -04001795 case -EAGAIN:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001796 case -ESTALE:
1797 break;
1798 case -NFS4ERR_BADSESSION:
1799 case -NFS4ERR_BADSLOT:
1800 case -NFS4ERR_BAD_HIGH_SLOT:
1801 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1802 case -NFS4ERR_DEADSESSION:
1803 set_bit(NFS_DELEGATED_STATE, &state->flags);
1804 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1805 return -EAGAIN;
1806 case -NFS4ERR_STALE_CLIENTID:
1807 case -NFS4ERR_STALE_STATEID:
1808 set_bit(NFS_DELEGATED_STATE, &state->flags);
1809 case -NFS4ERR_EXPIRED:
1810 /* Don't recall a delegation if it was lost */
1811 nfs4_schedule_lease_recovery(server->nfs_client);
1812 return -EAGAIN;
Chuck Lever352297b2013-10-17 14:13:24 -04001813 case -NFS4ERR_MOVED:
1814 nfs4_schedule_migration_recovery(server);
1815 return -EAGAIN;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04001816 case -NFS4ERR_LEASE_MOVED:
1817 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1818 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001819 case -NFS4ERR_DELEG_REVOKED:
1820 case -NFS4ERR_ADMIN_REVOKED:
1821 case -NFS4ERR_BAD_STATEID:
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001822 case -NFS4ERR_OPENMODE:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001823 nfs_inode_find_state_and_recover(state->inode,
1824 stateid);
1825 nfs4_schedule_stateid_recovery(server, state);
Trond Myklebust869f9df2014-11-10 18:43:56 -05001826 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001827 case -NFS4ERR_DELAY:
1828 case -NFS4ERR_GRACE:
1829 set_bit(NFS_DELEGATED_STATE, &state->flags);
1830 ssleep(1);
1831 return -EAGAIN;
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001832 case -ENOMEM:
1833 case -NFS4ERR_DENIED:
1834 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1835 return 0;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001836 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 return err;
1838}
1839
Trond Myklebust24311f82015-09-20 10:50:17 -04001840int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1841 struct nfs4_state *state, const nfs4_stateid *stateid,
1842 fmode_t type)
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001843{
1844 struct nfs_server *server = NFS_SERVER(state->inode);
1845 struct nfs4_opendata *opendata;
Trond Myklebust24311f82015-09-20 10:50:17 -04001846 int err = 0;
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001847
1848 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1849 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1850 if (IS_ERR(opendata))
1851 return PTR_ERR(opendata);
1852 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
Jeff Layton5e99b532015-10-02 13:14:37 -04001853 write_seqlock(&state->seqlock);
1854 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1855 write_sequnlock(&state->seqlock);
Trond Myklebust24311f82015-09-20 10:50:17 -04001856 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1857 switch (type & (FMODE_READ|FMODE_WRITE)) {
1858 case FMODE_READ|FMODE_WRITE:
1859 case FMODE_WRITE:
1860 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1861 if (err)
1862 break;
1863 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1864 if (err)
1865 break;
1866 case FMODE_READ:
1867 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1868 }
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001869 nfs4_opendata_put(opendata);
1870 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1871}
1872
Chuck Leverbe05c862013-08-09 12:49:47 -04001873static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1874{
1875 struct nfs4_opendata *data = calldata;
1876
Peng Taocb04ad22014-06-11 05:24:15 +08001877 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1878 &data->c_arg.seq_args, &data->c_res.seq_res, task);
Chuck Leverbe05c862013-08-09 12:49:47 -04001879}
1880
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001881static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1882{
1883 struct nfs4_opendata *data = calldata;
1884
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001885 nfs40_sequence_done(task, &data->c_res.seq_res);
Chuck Leverbe05c862013-08-09 12:49:47 -04001886
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001887 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001888 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001889 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
Trond Myklebustbb226292008-01-02 15:19:18 -05001890 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001891 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -04001892 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001893 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001894}
1895
1896static void nfs4_open_confirm_release(void *calldata)
1897{
1898 struct nfs4_opendata *data = calldata;
1899 struct nfs4_state *state = NULL;
1900
1901 /* If this request hasn't been cancelled, do nothing */
1902 if (data->cancelled == 0)
1903 goto out_free;
1904 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001905 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001906 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001907 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001908 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001909 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001910out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001911 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001912}
1913
1914static const struct rpc_call_ops nfs4_open_confirm_ops = {
Chuck Leverbe05c862013-08-09 12:49:47 -04001915 .rpc_call_prepare = nfs4_open_confirm_prepare,
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001916 .rpc_call_done = nfs4_open_confirm_done,
1917 .rpc_release = nfs4_open_confirm_release,
1918};
1919
1920/*
1921 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1922 */
1923static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1924{
David Howells2b0143b2015-03-17 22:25:59 +00001925 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001926 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001927 struct rpc_message msg = {
1928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1929 .rpc_argp = &data->c_arg,
1930 .rpc_resp = &data->c_res,
1931 .rpc_cred = data->owner->so_cred,
1932 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001933 struct rpc_task_setup task_setup_data = {
1934 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001935 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001936 .callback_ops = &nfs4_open_confirm_ops,
1937 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001938 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001939 .flags = RPC_TASK_ASYNC,
1940 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 int status;
1942
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001943 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001944 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001945 data->rpc_done = 0;
1946 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001947 data->timestamp = jiffies;
Benjamin Coddingtone92c1e02015-10-01 09:17:33 -04001948 if (data->is_recover)
1949 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
Trond Myklebustc970aa82007-07-14 15:39:59 -04001950 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05001951 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001952 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001953 status = nfs4_wait_for_completion_rpc_task(task);
1954 if (status != 0) {
1955 data->cancelled = 1;
1956 smp_wmb();
1957 } else
1958 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05001959 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 return status;
1961}
1962
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001963static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964{
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001965 struct nfs4_opendata *data = calldata;
1966 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust549b19c2013-04-16 18:42:34 -04001967 struct nfs_client *clp = sp->so_server->nfs_client;
Trond Myklebust2a606182015-08-19 22:30:00 -05001968 enum open_claim_type4 claim = data->o_arg.claim;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001969
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001970 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001971 goto out_wait;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001972 /*
1973 * Check if we still need to send an OPEN call, or if we can use
1974 * a delegation instead.
1975 */
1976 if (data->state != NULL) {
1977 struct nfs_delegation *delegation;
1978
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001979 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
Trond Myklebust6ee41262007-07-08 14:11:36 -04001980 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001981 rcu_read_lock();
1982 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
Trond Myklebust2a606182015-08-19 22:30:00 -05001983 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
Trond Myklebust652f89f2011-12-09 19:05:58 -05001984 goto unlock_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001985 rcu_read_unlock();
1986 }
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001987 /* Update client id. */
Trond Myklebust549b19c2013-04-16 18:42:34 -04001988 data->o_arg.clientid = clp->cl_clientid;
Trond Myklebust2a606182015-08-19 22:30:00 -05001989 switch (claim) {
1990 default:
1991 break;
Trond Myklebust8188df12013-04-23 14:31:19 -04001992 case NFS4_OPEN_CLAIM_PREVIOUS:
1993 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1994 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001995 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
Trond Myklebust8188df12013-04-23 14:31:19 -04001996 case NFS4_OPEN_CLAIM_FH:
1997 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001998 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1999 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01002000 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04002001 if (nfs4_setup_sequence(data->o_arg.server,
Andy Adamsond8985282009-04-01 09:22:21 -04002002 &data->o_arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002003 &data->o_res.seq_res,
2004 task) != 0)
2005 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust549b19c2013-04-16 18:42:34 -04002006
2007 /* Set the create mode (note dependency on the session type) */
2008 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2009 if (data->o_arg.open_flags & O_EXCL) {
2010 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2011 if (nfs4_has_persistent_session(clp))
2012 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2013 else if (clp->cl_mvops->minor_version > 0)
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2015 }
Trond Myklebust6ee41262007-07-08 14:11:36 -04002016 return;
Trond Myklebust652f89f2011-12-09 19:05:58 -05002017unlock_no_action:
2018 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04002019out_no_action:
2020 task->tk_action = NULL;
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002021out_wait:
Trond Myklebustb75ad4c2012-11-29 17:27:47 -05002022 nfs4_sequence_done(task, &data->o_res.seq_res);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002023}
2024
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002025static void nfs4_open_done(struct rpc_task *task, void *calldata)
2026{
2027 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002029 data->rpc_status = task->tk_status;
Andy Adamsond8985282009-04-01 09:22:21 -04002030
Trond Myklebust14516c32010-07-31 14:29:06 -04002031 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2032 return;
Andy Adamsond8985282009-04-01 09:22:21 -04002033
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002034 if (task->tk_status == 0) {
Trond Myklebust807d66d82012-10-02 17:09:00 -07002035 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2036 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -07002037 case S_IFREG:
2038 break;
2039 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002040 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -07002041 break;
2042 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002043 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -07002044 break;
2045 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002046 data->rpc_status = -ENOTDIR;
Trond Myklebust807d66d82012-10-02 17:09:00 -07002047 }
Trond Myklebust6f926b52005-10-18 14:20:18 -07002048 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01002049 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -04002050 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2051 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -07002052 }
Trond Myklebust3e309912007-07-07 13:19:59 -04002053 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002054}
Trond Myklebust6f926b52005-10-18 14:20:18 -07002055
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002056static void nfs4_open_release(void *calldata)
2057{
2058 struct nfs4_opendata *data = calldata;
2059 struct nfs4_state *state = NULL;
2060
2061 /* If this request hasn't been cancelled, do nothing */
2062 if (data->cancelled == 0)
2063 goto out_free;
2064 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04002065 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002066 goto out_free;
2067 /* In case we need an open_confirm, no cleanup! */
2068 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2069 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002070 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04002071 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04002072 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002073out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002074 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002075}
2076
2077static const struct rpc_call_ops nfs4_open_ops = {
2078 .rpc_call_prepare = nfs4_open_prepare,
2079 .rpc_call_done = nfs4_open_done,
2080 .rpc_release = nfs4_open_release,
2081};
2082
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002083static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002084{
David Howells2b0143b2015-03-17 22:25:59 +00002085 struct inode *dir = d_inode(data->dir);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002086 struct nfs_server *server = NFS_SERVER(dir);
2087 struct nfs_openargs *o_arg = &data->o_arg;
2088 struct nfs_openres *o_res = &data->o_res;
2089 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002090 struct rpc_message msg = {
2091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2092 .rpc_argp = o_arg,
2093 .rpc_resp = o_res,
2094 .rpc_cred = data->owner->so_cred,
2095 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002096 struct rpc_task_setup task_setup_data = {
2097 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002098 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002099 .callback_ops = &nfs4_open_ops,
2100 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05002101 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002102 .flags = RPC_TASK_ASYNC,
2103 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002104 int status;
2105
Chuck Levera9c92d62013-08-09 12:48:18 -04002106 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002107 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04002108 data->rpc_done = 0;
2109 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04002110 data->cancelled = 0;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04002111 data->is_recover = 0;
2112 if (isrecover) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04002113 nfs4_set_sequence_privileged(&o_arg->seq_args);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04002114 data->is_recover = 1;
2115 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04002116 task = rpc_run_task(&task_setup_data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002117 if (IS_ERR(task))
2118 return PTR_ERR(task);
2119 status = nfs4_wait_for_completion_rpc_task(task);
2120 if (status != 0) {
2121 data->cancelled = 1;
2122 smp_wmb();
2123 } else
2124 status = data->rpc_status;
2125 rpc_put_task(task);
2126
2127 return status;
2128}
2129
2130static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2131{
David Howells2b0143b2015-03-17 22:25:59 +00002132 struct inode *dir = d_inode(data->dir);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002133 struct nfs_openres *o_res = &data->o_res;
2134 int status;
2135
2136 status = nfs4_run_open_task(data, 1);
2137 if (status != 0 || !data->rpc_done)
2138 return status;
2139
Trond Myklebust6926afd2012-01-07 13:22:46 -05002140 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2141
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002142 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2143 status = _nfs4_proc_open_confirm(data);
2144 if (status != 0)
2145 return status;
2146 }
2147
2148 return status;
2149}
2150
Trond Myklebustf3792d62014-07-10 08:54:32 -04002151/*
2152 * Additional permission checks in order to distinguish between an
2153 * open for read, and an open for execute. This works around the
2154 * fact that NFSv4 OPEN treats read and execute permissions as being
2155 * the same.
2156 * Note that in the non-execute case, we want to turn off permission
2157 * checking if we just created a new file (POSIX open() semantics).
2158 */
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002159static int nfs4_opendata_access(struct rpc_cred *cred,
2160 struct nfs4_opendata *opendata,
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002161 struct nfs4_state *state, fmode_t fmode,
2162 int openflags)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002163{
2164 struct nfs_access_entry cache;
2165 u32 mask;
2166
2167 /* access call failed or for some reason the server doesn't
2168 * support any access modes -- defer access call until later */
2169 if (opendata->o_res.access_supported == 0)
2170 return 0;
2171
2172 mask = 0;
Trond Myklebustf3792d62014-07-10 08:54:32 -04002173 /*
2174 * Use openflags to check for exec, because fmode won't
2175 * always have FMODE_EXEC set when file open for exec.
2176 */
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002177 if (openflags & __FMODE_EXEC) {
2178 /* ONLY check for exec rights */
2179 mask = MAY_EXEC;
Trond Myklebustf3792d62014-07-10 08:54:32 -04002180 } else if ((fmode & FMODE_READ) && !opendata->file_created)
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05002181 mask = MAY_READ;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002182
2183 cache.cred = cred;
2184 cache.jiffies = jiffies;
2185 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2186 nfs_access_add_cache(state->inode, &cache);
2187
Weston Andros Adamsonbbd3a8e2012-10-02 14:49:51 -07002188 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002189 return 0;
2190
2191 /* even though OPEN succeeded, access is denied. Close the file */
2192 nfs4_close_state(state, fmode);
Weston Andros Adamson998f40b2012-11-02 18:00:56 -04002193 return -EACCES;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002194}
2195
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002196/*
2197 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2198 */
2199static int _nfs4_proc_open(struct nfs4_opendata *data)
2200{
David Howells2b0143b2015-03-17 22:25:59 +00002201 struct inode *dir = d_inode(data->dir);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002202 struct nfs_server *server = NFS_SERVER(dir);
2203 struct nfs_openargs *o_arg = &data->o_arg;
2204 struct nfs_openres *o_res = &data->o_res;
2205 int status;
2206
2207 status = nfs4_run_open_task(data, 0);
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002208 if (!data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002209 return status;
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002210 if (status != 0) {
2211 if (status == -NFS4ERR_BADNAME &&
2212 !(o_arg->open_flags & O_CREAT))
2213 return -ENOENT;
2214 return status;
2215 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002216
Trond Myklebust6926afd2012-01-07 13:22:46 -05002217 nfs_fattr_map_and_free_names(server, &data->f_attr);
2218
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002219 if (o_arg->open_flags & O_CREAT) {
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002220 update_changeattr(dir, &o_res->cinfo);
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002221 if (o_arg->open_flags & O_EXCL)
2222 data->file_created = 1;
2223 else if (o_res->cinfo.before != o_res->cinfo.after)
2224 data->file_created = 1;
2225 }
Trond Myklebust0df5dd42010-04-11 16:48:44 -04002226 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2227 server->caps &= ~NFS_CAP_POSIX_LOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +01002229 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002231 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 }
2233 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Andy Adamson8935ef62014-05-23 06:22:59 -07002234 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002235 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236}
2237
Andy Adamsond83217c2011-03-01 01:34:17 +00002238static int nfs4_recover_expired_lease(struct nfs_server *server)
2239{
2240 return nfs4_client_recover_expired_lease(server->nfs_client);
2241}
2242
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243/*
2244 * OPEN_EXPIRED:
2245 * reclaim state on the server after a network partition.
2246 * Assumes caller holds the appropriate lock
2247 */
Trond Myklebust539cd032007-06-05 11:46:42 -04002248static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249{
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002250 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +01002251 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002253 opendata = nfs4_open_recoverdata_alloc(ctx, state,
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002254 NFS4_OPEN_CLAIM_FH);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04002255 if (IS_ERR(opendata))
2256 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002257 ret = nfs4_open_recover(opendata, state);
Trond Myklebust35d05772008-04-05 15:54:17 -04002258 if (ret == -ESTALE)
Al Viro3d4ff432011-06-22 18:40:12 -04002259 d_drop(ctx->dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002260 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002261 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262}
2263
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002264static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +00002265{
Trond Myklebust539cd032007-06-05 11:46:42 -04002266 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +00002267 struct nfs4_exception exception = { };
2268 int err;
2269
2270 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04002271 err = _nfs4_open_expired(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04002272 trace_nfs4_open_expired(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002273 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2274 continue;
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002275 switch (err) {
2276 default:
2277 goto out;
2278 case -NFS4ERR_GRACE:
2279 case -NFS4ERR_DELAY:
2280 nfs4_handle_exception(server, err, &exception);
2281 err = 0;
2282 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00002283 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002284out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00002285 return err;
2286}
2287
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2289{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01002291 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292
Trond Myklebust864472e2006-01-03 09:55:15 +01002293 ctx = nfs4_state_find_open_context(state);
2294 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04002295 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04002296 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01002297 put_nfs_open_context(ctx);
2298 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299}
2300
Trond Myklebust4dfd4f72014-10-17 15:10:25 +03002301static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2302{
2303 nfs_remove_bad_delegation(state->inode);
2304 write_seqlock(&state->seqlock);
2305 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2306 write_sequnlock(&state->seqlock);
2307 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2308}
2309
2310static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2311{
2312 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2313 nfs_finish_clear_delegation_stateid(state);
2314}
2315
2316static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2317{
2318 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2319 nfs40_clear_delegation_stateid(state);
2320 return nfs4_open_expired(sp, state);
2321}
2322
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002323#if defined(CONFIG_NFS_V4_1)
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002324static void nfs41_check_delegation_stateid(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002325{
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002326 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002327 nfs4_stateid stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002328 struct nfs_delegation *delegation;
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002329 struct rpc_cred *cred;
2330 int status;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002331
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002332 /* Get the delegation credential for use by test/free_stateid */
2333 rcu_read_lock();
2334 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002335 if (delegation == NULL) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002336 rcu_read_unlock();
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002337 return;
2338 }
2339
2340 nfs4_stateid_copy(&stateid, &delegation->stateid);
2341 cred = get_rpccred(delegation->cred);
2342 rcu_read_unlock();
2343 status = nfs41_test_stateid(server, &stateid, cred);
2344 trace_nfs4_test_delegation_stateid(state, NULL, status);
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002345
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002346 if (status != NFS_OK) {
2347 /* Free the stateid unless the server explicitly
2348 * informs us the stateid is unrecognized. */
2349 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002350 nfs41_free_stateid(server, &stateid, cred);
2351 nfs_finish_clear_delegation_stateid(state);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002352 }
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002353
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002354 put_rpccred(cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002355}
2356
2357/**
2358 * nfs41_check_open_stateid - possibly free an open stateid
2359 *
2360 * @state: NFSv4 state for an inode
2361 *
2362 * Returns NFS_OK if recovery for this stateid is now finished.
2363 * Otherwise a negative NFS4ERR value is returned.
2364 */
2365static int nfs41_check_open_stateid(struct nfs4_state *state)
2366{
2367 struct nfs_server *server = NFS_SERVER(state->inode);
Bryan Schumakerfcb6d9c2012-09-26 15:25:53 -04002368 nfs4_stateid *stateid = &state->open_stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002369 struct rpc_cred *cred = state->owner->so_cred;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002370 int status;
2371
2372 /* If a state reset has been done, test_stateid is unneeded */
2373 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2374 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2375 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2376 return -NFS4ERR_BAD_STATEID;
2377
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002378 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002379 trace_nfs4_test_open_stateid(state, NULL, status);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002380 if (status != NFS_OK) {
2381 /* Free the stateid unless the server explicitly
2382 * informs us the stateid is unrecognized. */
2383 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002384 nfs41_free_stateid(server, stateid, cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002385
2386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2387 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2388 clear_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04002389 clear_bit(NFS_OPEN_STATE, &state->flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002390 }
2391 return status;
2392}
2393
2394static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2395{
Chuck Levereb64cf92012-07-11 16:30:05 -04002396 int status;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002397
Trond Myklebust0c116ca2014-11-12 14:44:49 -05002398 nfs41_check_delegation_stateid(state);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002399 status = nfs41_check_open_stateid(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04002400 if (status != NFS_OK)
2401 status = nfs4_open_expired(sp, state);
2402 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002403}
2404#endif
2405
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002407 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2408 * fields corresponding to attributes that were used to store the verifier.
2409 * Make sure we clobber those fields in the later setattr call
2410 */
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002411static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2412 struct iattr *sattr, struct nfs4_label **label)
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002413{
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002414 const u32 *attrset = opendata->o_res.attrset;
2415
2416 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002417 !(sattr->ia_valid & ATTR_ATIME_SET))
2418 sattr->ia_valid |= ATTR_ATIME;
2419
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002420 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002421 !(sattr->ia_valid & ATTR_MTIME_SET))
2422 sattr->ia_valid |= ATTR_MTIME;
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002423
2424 /* Except MODE, it seems harmless of setting twice. */
2425 if ((attrset[1] & FATTR4_WORD1_MODE))
2426 sattr->ia_valid &= ~ATTR_MODE;
2427
2428 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2429 *label = NULL;
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002430}
2431
Trond Myklebustc21443c2013-02-07 14:26:21 -05002432static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2433 fmode_t fmode,
2434 int flags,
Trond Myklebust3efb9722013-05-29 13:17:04 -04002435 struct nfs_open_context *ctx)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002436{
2437 struct nfs4_state_owner *sp = opendata->owner;
2438 struct nfs_server *server = sp->so_server;
Trond Myklebust275bb302013-05-29 13:11:28 -04002439 struct dentry *dentry;
Trond Myklebustc21443c2013-02-07 14:26:21 -05002440 struct nfs4_state *state;
2441 unsigned int seq;
2442 int ret;
2443
2444 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2445
2446 ret = _nfs4_proc_open(opendata);
Trond Myklebustdca780012014-10-23 19:23:03 +03002447 if (ret != 0)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002448 goto out;
2449
2450 state = nfs4_opendata_to_nfs4_state(opendata);
2451 ret = PTR_ERR(state);
2452 if (IS_ERR(state))
2453 goto out;
2454 if (server->caps & NFS_CAP_POSIX_LOCK)
2455 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2456
Trond Myklebust275bb302013-05-29 13:11:28 -04002457 dentry = opendata->dentry;
David Howells2b0143b2015-03-17 22:25:59 +00002458 if (d_really_is_negative(dentry)) {
Trond Myklebust275bb302013-05-29 13:11:28 -04002459 /* FIXME: Is this d_drop() ever needed? */
2460 d_drop(dentry);
2461 dentry = d_add_unique(dentry, igrab(state->inode));
2462 if (dentry == NULL) {
2463 dentry = opendata->dentry;
2464 } else if (dentry != ctx->dentry) {
2465 dput(ctx->dentry);
2466 ctx->dentry = dget(dentry);
2467 }
2468 nfs_set_verifier(dentry,
David Howells2b0143b2015-03-17 22:25:59 +00002469 nfs_save_change_attribute(d_inode(opendata->dir)));
Trond Myklebust275bb302013-05-29 13:11:28 -04002470 }
2471
Trond Myklebustc21443c2013-02-07 14:26:21 -05002472 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2473 if (ret != 0)
2474 goto out;
2475
Trond Myklebust3efb9722013-05-29 13:17:04 -04002476 ctx->state = state;
David Howells2b0143b2015-03-17 22:25:59 +00002477 if (d_inode(dentry) == state->inode) {
Trond Myklebustc45ffdd2013-05-29 13:34:46 -04002478 nfs_inode_attach_open_context(ctx);
2479 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2480 nfs4_schedule_stateid_recovery(server, state);
2481 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002482out:
2483 return ret;
2484}
2485
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002486/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002487 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 */
Andy Adamson82be4172012-05-23 05:02:35 -04002489static int _nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002490 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002491 int flags,
2492 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002493 struct nfs4_label *label,
2494 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495{
2496 struct nfs4_state_owner *sp;
2497 struct nfs4_state *state = NULL;
2498 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002499 struct nfs4_opendata *opendata;
Trond Myklebust4197a052013-05-29 12:37:49 -04002500 struct dentry *dentry = ctx->dentry;
2501 struct rpc_cred *cred = ctx->cred;
2502 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2503 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002504 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
David Quigley1775fd32013-05-22 12:50:42 -04002505 struct nfs4_label *olabel = NULL;
Trond Myklebustaac00a82007-07-05 19:02:21 -04002506 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507
2508 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 status = -ENOMEM;
Trond Myklebustd1e284d2012-01-17 22:04:24 -05002510 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2511 if (sp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2513 goto out_err;
2514 }
Trond Myklebust58d97142006-01-03 09:55:24 +01002515 status = nfs4_recover_expired_lease(server);
2516 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002517 goto err_put_state_owner;
David Howells2b0143b2015-03-17 22:25:59 +00002518 if (d_really_is_positive(dentry))
2519 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
Trond Myklebust58d97142006-01-03 09:55:24 +01002520 status = -ENOMEM;
David Howells2b0143b2015-03-17 22:25:59 +00002521 if (d_really_is_positive(dentry))
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002522 claim = NFS4_OPEN_CLAIM_FH;
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002523 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002524 label, claim, GFP_KERNEL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002525 if (opendata == NULL)
Trond Myklebust95d35cb2008-12-23 15:21:45 -05002526 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527
David Quigley14c43f72013-05-22 12:50:43 -04002528 if (label) {
2529 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2530 if (IS_ERR(olabel)) {
2531 status = PTR_ERR(olabel);
2532 goto err_opendata_put;
2533 }
2534 }
2535
Trond Myklebuste911b812014-03-26 13:24:37 -07002536 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2537 if (!opendata->f_attr.mdsthreshold) {
2538 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2539 if (!opendata->f_attr.mdsthreshold)
2540 goto err_free_label;
2541 }
Trond Myklebust1549210f2012-06-05 09:16:47 -04002542 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
Andy Adamson82be4172012-05-23 05:02:35 -04002543 }
David Howells2b0143b2015-03-17 22:25:59 +00002544 if (d_really_is_positive(dentry))
2545 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
Trond Myklebustaac00a82007-07-05 19:02:21 -04002546
Trond Myklebust3efb9722013-05-29 13:17:04 -04002547 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002548 if (status != 0)
David Quigley14c43f72013-05-22 12:50:43 -04002549 goto err_free_label;
Trond Myklebust3efb9722013-05-29 13:17:04 -04002550 state = ctx->state;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002551
NeilBrownefcbc042015-07-30 13:00:56 +10002552 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
Trond Myklebust549b19c2013-04-16 18:42:34 -04002553 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
Kinglong Mee5334c5b2015-08-26 21:13:37 +08002554 nfs4_exclusive_attrset(opendata, sattr, &label);
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002555
2556 nfs_fattr_init(opendata->o_res.f_attr);
2557 status = nfs4_do_setattr(state->inode, cred,
2558 opendata->o_res.f_attr, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002559 state, label, olabel);
2560 if (status == 0) {
Trond Myklebustf0446362015-02-26 16:09:04 -05002561 nfs_setattr_update_inode(state->inode, sattr,
2562 opendata->o_res.f_attr);
David Quigleyaa9c2662013-05-22 12:50:44 -04002563 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
David Quigley1775fd32013-05-22 12:50:42 -04002564 }
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002565 }
Kinglong Meec5c3fb52015-08-26 21:11:39 +08002566 if (opened && opendata->file_created)
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002567 *opened |= FILE_CREATED;
Andy Adamson82be4172012-05-23 05:02:35 -04002568
Trond Myklebuste911b812014-03-26 13:24:37 -07002569 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
Andy Adamson82be4172012-05-23 05:02:35 -04002570 *ctx_th = opendata->f_attr.mdsthreshold;
Trond Myklebuste911b812014-03-26 13:24:37 -07002571 opendata->f_attr.mdsthreshold = NULL;
2572 }
Andy Adamson82be4172012-05-23 05:02:35 -04002573
David Quigley14c43f72013-05-22 12:50:43 -04002574 nfs4_label_free(olabel);
2575
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002576 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002578 return 0;
David Quigley14c43f72013-05-22 12:50:43 -04002579err_free_label:
2580 nfs4_label_free(olabel);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002581err_opendata_put:
2582 nfs4_opendata_put(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002583err_put_state_owner:
2584 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 return status;
2587}
2588
2589
Andy Adamson82be4172012-05-23 05:02:35 -04002590static struct nfs4_state *nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002591 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002592 int flags,
2593 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002594 struct nfs4_label *label,
2595 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596{
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002597 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598 struct nfs4_exception exception = { };
2599 struct nfs4_state *res;
2600 int status;
2601
2602 do {
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002603 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
Trond Myklebust3efb9722013-05-29 13:17:04 -04002604 res = ctx->state;
Trond Myklebust42113a72013-08-12 16:19:27 -04002605 trace_nfs4_open_file(ctx, flags, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606 if (status == 0)
2607 break;
2608 /* NOTE: BAD_SEQID means the server and client disagree about the
2609 * book-keeping w.r.t. state-changing operations
2610 * (OPEN/CLOSE/LOCK/LOCKU...)
2611 * It is actually a sign of a bug on the client or on the server.
2612 *
2613 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07002614 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 * have unhashed the old state_owner for us, and that we can
2616 * therefore safely retry using a new one. We should still warn
2617 * the user though...
2618 */
2619 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust9a3ba432012-03-12 18:01:48 -04002620 pr_warn_ratelimited("NFS: v4 server %s "
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04002621 " returned a bad sequence-id error!\n",
2622 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623 exception.retry = 1;
2624 continue;
2625 }
Trond Myklebust550f5742005-10-18 14:20:21 -07002626 /*
2627 * BAD_STATEID on OPEN means that the server cancelled our
2628 * state before it received the OPEN_CONFIRM.
2629 * Recover by retrying the request as per the discussion
2630 * on Page 181 of RFC3530.
2631 */
2632 if (status == -NFS4ERR_BAD_STATEID) {
2633 exception.retry = 1;
2634 continue;
2635 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04002636 if (status == -EAGAIN) {
2637 /* We must have found a delegation */
2638 exception.retry = 1;
2639 continue;
2640 }
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002641 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2642 continue;
2643 res = ERR_PTR(nfs4_handle_exception(server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002644 status, &exception));
2645 } while (exception.retry);
2646 return res;
2647}
2648
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002649static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2650 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002651 struct nfs4_state *state, struct nfs4_label *ilabel,
2652 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002653{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002654 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002655 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002656 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657 .iap = sattr,
2658 .server = server,
2659 .bitmask = server->attr_bitmask,
David Quigley1775fd32013-05-22 12:50:42 -04002660 .label = ilabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 };
2662 struct nfs_setattrres res = {
2663 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04002664 .label = olabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665 .server = server,
2666 };
2667 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2669 .rpc_argp = &arg,
2670 .rpc_resp = &res,
2671 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002672 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01002673 unsigned long timestamp = jiffies;
Trond Myklebustee3ae842013-04-29 10:35:36 -04002674 fmode_t fmode;
2675 bool truncate;
Trond Myklebust65e43082005-08-16 11:49:44 -04002676 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677
David Quigleyaa9c2662013-05-22 12:50:44 -04002678 arg.bitmask = nfs4_bitmask(server, ilabel);
2679 if (ilabel)
2680 arg.bitmask = nfs4_bitmask(server, olabel);
2681
Trond Myklebust0e574af2005-10-27 22:12:38 -04002682 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683
Trond Myklebustee3ae842013-04-29 10:35:36 -04002684 /* Servers should only apply open mode checks for file size changes */
2685 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2686 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2687
2688 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2689 /* Use that stateid */
Trond Myklebust0418dae2014-03-04 13:48:16 -05002690 } else if (truncate && state != NULL) {
Trond Myklebust2a369152012-08-13 18:54:45 -04002691 struct nfs_lockowner lockowner = {
2692 .l_owner = current->files,
2693 .l_pid = current->tgid,
2694 };
Trond Myklebust0418dae2014-03-04 13:48:16 -05002695 if (!nfs4_valid_open_stateid(state))
2696 return -EBADF;
2697 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2698 &lockowner) == -EIO)
2699 return -EBADF;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00002700 } else
Trond Myklebustf597c532012-03-04 18:13:56 -05002701 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702
Bryan Schumaker7c513052011-03-24 17:12:24 +00002703 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002704 if (status == 0 && state != NULL)
2705 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04002706 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707}
2708
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002709static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2710 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002711 struct nfs4_state *state, struct nfs4_label *ilabel,
2712 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002714 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002715 struct nfs4_exception exception = {
2716 .state = state,
Trond Myklebust3114ea72012-03-07 16:39:06 -05002717 .inode = inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002718 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 int err;
2720 do {
David Quigley1775fd32013-05-22 12:50:42 -04002721 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
Trond Myklebustc1578b72013-08-12 16:58:42 -04002722 trace_nfs4_setattr(inode, err);
Trond Myklebust451146b2012-04-18 16:29:11 -04002723 switch (err) {
2724 case -NFS4ERR_OPENMODE:
Trond Myklebust721ccfb2013-04-29 11:11:58 -04002725 if (!(sattr->ia_valid & ATTR_SIZE)) {
2726 pr_warn_once("NFSv4: server %s is incorrectly "
2727 "applying open mode checks to "
2728 "a SETATTR that is not "
2729 "changing file size.\n",
2730 server->nfs_client->cl_hostname);
2731 }
Trond Myklebust451146b2012-04-18 16:29:11 -04002732 if (state && !(state->state & FMODE_WRITE)) {
2733 err = -EBADF;
2734 if (sattr->ia_valid & ATTR_OPEN)
2735 err = -EACCES;
2736 goto out;
2737 }
2738 }
2739 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002740 } while (exception.retry);
Trond Myklebust451146b2012-04-18 16:29:11 -04002741out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002742 return err;
2743}
2744
Peng Tao500d7012015-09-22 11:35:22 +08002745static bool
2746nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2747{
2748 if (inode == NULL || !nfs_have_layout(inode))
2749 return false;
2750
2751 return pnfs_wait_on_layoutreturn(inode, task);
2752}
2753
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754struct nfs4_closedata {
2755 struct inode *inode;
2756 struct nfs4_state *state;
2757 struct nfs_closeargs arg;
2758 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002759 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002760 unsigned long timestamp;
Fred Isamanf7e89172011-01-06 11:36:32 +00002761 bool roc;
2762 u32 roc_barrier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763};
2764
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002765static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07002766{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002767 struct nfs4_closedata *calldata = data;
2768 struct nfs4_state_owner *sp = calldata->state->owner;
Al Viro643168c2011-06-22 18:20:23 -04002769 struct super_block *sb = calldata->state->inode->i_sb;
Trond Myklebust95121352005-10-18 14:20:12 -07002770
Fred Isamanf7e89172011-01-06 11:36:32 +00002771 if (calldata->roc)
2772 pnfs_roc_release(calldata->state->inode);
Trond Myklebust95121352005-10-18 14:20:12 -07002773 nfs4_put_open_state(calldata->state);
2774 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07002775 nfs4_put_state_owner(sp);
Trond Myklebust322b2b92013-01-11 16:39:51 -05002776 nfs_sb_deactive(sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002777 kfree(calldata);
2778}
2779
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002780static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002781{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002782 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784 struct nfs_server *server = NFS_SERVER(calldata->inode);
Trond Myklebust412f6c42014-08-25 22:09:08 -04002785 nfs4_stateid *res_stateid = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002786
Chuck Levera3ca5652012-03-01 17:00:40 -05002787 dprintk("%s: begin!\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04002788 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2789 return;
Trond Myklebust42113a72013-08-12 16:19:27 -04002790 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 /* hmm. we are done with the inode, and in the process of freeing
2792 * the state_owner. we keep this around to process errors
2793 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794 switch (task->tk_status) {
2795 case 0:
Trond Myklebust412f6c42014-08-25 22:09:08 -04002796 res_stateid = &calldata->res.stateid;
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002797 if (calldata->roc)
Fred Isamanf7e89172011-01-06 11:36:32 +00002798 pnfs_roc_set_barrier(state->inode,
2799 calldata->roc_barrier);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002800 renew_lease(server, calldata->timestamp);
Trond Myklebust412f6c42014-08-25 22:09:08 -04002801 break;
Trond Myklebust69794ad2013-11-20 12:57:19 -05002802 case -NFS4ERR_ADMIN_REVOKED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002803 case -NFS4ERR_STALE_STATEID:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002804 case -NFS4ERR_OLD_STATEID:
2805 case -NFS4ERR_BAD_STATEID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806 case -NFS4ERR_EXPIRED:
Trond Myklebust566fcec2015-01-23 15:32:46 -05002807 if (!nfs4_stateid_match(&calldata->arg.stateid,
Anna Schumaker369d6b72015-03-02 16:46:09 -05002808 &state->open_stateid)) {
Trond Myklebust566fcec2015-01-23 15:32:46 -05002809 rpc_restart_call_prepare(task);
2810 goto out_release;
2811 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002812 if (calldata->arg.fmode == 0)
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002813 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10002815 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
Trond Myklebust72211db2009-12-15 14:47:36 -05002816 rpc_restart_call_prepare(task);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002817 goto out_release;
2818 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002819 }
Trond Myklebust4a1e2fe2015-08-30 18:37:59 -07002820 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2821 res_stateid, calldata->arg.fmode);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002822out_release:
Trond Myklebust72211db2009-12-15 14:47:36 -05002823 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebust516a6af2005-10-27 22:12:41 -04002824 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Chuck Levera3ca5652012-03-01 17:00:40 -05002825 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002826}
2827
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002828static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002830 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07002831 struct nfs4_state *state = calldata->state;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002832 struct inode *inode = calldata->inode;
Trond Myklebustaee7af32014-08-25 22:33:12 -04002833 bool is_rdonly, is_wronly, is_rdwr;
Trond Myklebust88069f72009-12-08 08:33:16 -05002834 int call_close = 0;
Trond Myklebust95121352005-10-18 14:20:12 -07002835
Chuck Levera3ca5652012-03-01 17:00:40 -05002836 dprintk("%s: begin!\n", __func__);
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002837 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002838 goto out_wait;
Trond Myklebust003707c2007-07-05 18:07:55 -04002839
Trond Myklebust88069f72009-12-08 08:33:16 -05002840 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust4cecb762005-11-04 15:32:58 -05002841 spin_lock(&state->owner->so_lock);
Trond Myklebustaee7af32014-08-25 22:33:12 -04002842 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2843 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2844 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
Anna Schumaker369d6b72015-03-02 16:46:09 -05002845 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04002846 /* Calculate the change in open mode */
Trond Myklebustcd9288f2014-09-18 11:51:32 -04002847 calldata->arg.fmode = 0;
Trond Myklebuste7616922006-01-03 09:55:13 +01002848 if (state->n_rdwr == 0) {
Trond Myklebustcd9288f2014-09-18 11:51:32 -04002849 if (state->n_rdonly == 0)
2850 call_close |= is_rdonly;
2851 else if (is_rdonly)
2852 calldata->arg.fmode |= FMODE_READ;
2853 if (state->n_wronly == 0)
2854 call_close |= is_wronly;
2855 else if (is_wronly)
2856 calldata->arg.fmode |= FMODE_WRITE;
2857 } else if (is_rdwr)
2858 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2859
2860 if (calldata->arg.fmode == 0)
2861 call_close |= is_rdwr;
2862
Trond Myklebust5d422302013-03-14 16:57:48 -04002863 if (!nfs4_valid_open_stateid(state))
2864 call_close = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002865 spin_unlock(&state->owner->so_lock);
Trond Myklebust88069f72009-12-08 08:33:16 -05002866
2867 if (!call_close) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002868 /* Note: exit _without_ calling nfs4_close_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002869 goto out_no_action;
Trond Myklebust95121352005-10-18 14:20:12 -07002870 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002871
Peng Tao500d7012015-09-22 11:35:22 +08002872 if (nfs4_wait_on_layoutreturn(inode, task)) {
2873 nfs_release_seqid(calldata->arg.seqid);
2874 goto out_wait;
2875 }
2876
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002877 if (calldata->arg.fmode == 0)
Trond Myklebust88069f72009-12-08 08:33:16 -05002878 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
Trond Myklebust3c13cb52015-08-18 23:45:13 -05002879 if (calldata->roc)
2880 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2881
Trond Myklebust6ae37332015-01-30 14:21:14 -05002882 calldata->arg.share_access =
2883 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2884 calldata->arg.fmode, 0);
Trond Myklebust88069f72009-12-08 08:33:16 -05002885
Trond Myklebust516a6af2005-10-27 22:12:41 -04002886 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002887 calldata->timestamp = jiffies;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002888 if (nfs4_setup_sequence(NFS_SERVER(inode),
Trond Myklebust9d12b212012-01-17 22:04:25 -05002889 &calldata->arg.seq_args,
2890 &calldata->res.seq_res,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002891 task) != 0)
2892 nfs_release_seqid(calldata->arg.seqid);
Chuck Levera3ca5652012-03-01 17:00:40 -05002893 dprintk("%s: done!\n", __func__);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002894 return;
2895out_no_action:
2896 task->tk_action = NULL;
2897out_wait:
2898 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002899}
2900
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002901static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002902 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002903 .rpc_call_done = nfs4_close_done,
2904 .rpc_release = nfs4_free_closedata,
2905};
2906
Peng Taofe08c542014-07-03 13:05:01 +08002907static bool nfs4_roc(struct inode *inode)
2908{
Trond Myklebust40dd4b72015-01-24 13:54:37 -05002909 if (!nfs_have_layout(inode))
Peng Taofe08c542014-07-03 13:05:01 +08002910 return false;
Peng Taofe08c542014-07-03 13:05:01 +08002911 return pnfs_roc(inode);
2912}
2913
Linus Torvalds1da177e2005-04-16 15:20:36 -07002914/*
2915 * It is possible for data to be read/written from a mem-mapped file
2916 * after the sys_close call (which hits the vfs layer as a flush).
2917 * This means that we can't safely call nfsv4 close on a file until
2918 * the inode is cleared. This in turn means that we are not good
2919 * NFSv4 citizens - we do not indicate to the server to update the file's
2920 * share state even when we are done with one of the three share
2921 * stateid's in the inode.
2922 *
2923 * NOTE: Caller must be holding the sp->so_owner semaphore!
2924 */
Trond Myklebust1f7977c2012-09-20 20:31:51 -04002925int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002927 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust63f5f792015-01-23 19:19:25 -05002928 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04002930 struct nfs4_state_owner *sp = state->owner;
2931 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2934 .rpc_cred = state->owner->so_cred,
2935 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002936 struct rpc_task_setup task_setup_data = {
2937 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002938 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002939 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05002940 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002941 .flags = RPC_TASK_ASYNC,
2942 };
Trond Myklebust95121352005-10-18 14:20:12 -07002943 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04002945 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2946 &task_setup_data.rpc_client, &msg);
2947
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002948 calldata = kzalloc(sizeof(*calldata), gfp_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002949 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07002950 goto out;
Chuck Levera9c92d62013-08-09 12:48:18 -04002951 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002952 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002954 calldata->arg.fh = NFS_FH(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955 /* Serialization for the sequence id */
Trond Myklebust63f5f792015-01-23 19:19:25 -05002956 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2957 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05002958 if (IS_ERR(calldata->arg.seqid))
Trond Myklebust95121352005-10-18 14:20:12 -07002959 goto out_free_calldata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002960 calldata->arg.fmode = 0;
Trond Myklebusta65318b2009-03-11 14:10:28 -04002961 calldata->arg.bitmask = server->cache_consistency_bitmask;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002962 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04002963 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002964 calldata->res.server = server;
Peng Taofe08c542014-07-03 13:05:01 +08002965 calldata->roc = nfs4_roc(state->inode);
Al Viro643168c2011-06-22 18:20:23 -04002966 nfs_sb_active(calldata->inode->i_sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002967
Trond Myklebust1174dd12010-12-21 10:52:24 -05002968 msg.rpc_argp = &calldata->arg;
2969 msg.rpc_resp = &calldata->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04002970 task_setup_data.callback_data = calldata;
2971 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002972 if (IS_ERR(task))
2973 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002974 status = 0;
2975 if (wait)
2976 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002977 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002978 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07002979out_free_calldata:
2980 kfree(calldata);
2981out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04002982 nfs4_put_open_state(state);
2983 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07002984 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002985}
2986
Trond Myklebust2b484292010-09-17 10:56:51 -04002987static struct inode *
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002988nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2989 int open_flags, struct iattr *attr, int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 struct nfs4_state *state;
David Quigleyaa9c2662013-05-22 12:50:44 -04002992 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2993
2994 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995
Trond Myklebust565277f2007-10-15 18:17:53 -04002996 /* Protect against concurrent sillydeletes */
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002997 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
David Quigleyaa9c2662013-05-22 12:50:44 -04002998
2999 nfs4_label_release_security(label);
3000
Trond Myklebustf46e0bd2010-09-17 10:56:50 -04003001 if (IS_ERR(state))
3002 return ERR_CAST(state);
Trond Myklebust275bb302013-05-29 13:11:28 -04003003 return state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003004}
3005
Trond Myklebust1185a552009-12-03 15:54:02 -05003006static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003007{
3008 if (ctx->state == NULL)
3009 return;
3010 if (is_sync)
Al Viro643168c2011-06-22 18:20:23 -04003011 nfs4_close_sync(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003012 else
Al Viro643168c2011-06-22 18:20:23 -04003013 nfs4_close_state(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003014}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003015
Trond Myklebustb944dba2013-11-04 15:20:20 -05003016#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3017#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
J. Bruce Fields999e5682014-06-03 17:33:35 -04003018#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
Trond Myklebustb944dba2013-11-04 15:20:20 -05003019
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3021{
Kinglong Mee8c612822015-08-26 21:12:58 +08003022 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
Benny Halevy43652ad2009-04-01 09:21:54 -04003023 struct nfs4_server_caps_arg args = {
3024 .fhandle = fhandle,
Kinglong Mee8c612822015-08-26 21:12:58 +08003025 .bitmask = bitmask,
Benny Halevy43652ad2009-04-01 09:21:54 -04003026 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027 struct nfs4_server_caps_res res = {};
3028 struct rpc_message msg = {
3029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
Benny Halevy43652ad2009-04-01 09:21:54 -04003030 .rpc_argp = &args,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031 .rpc_resp = &res,
3032 };
3033 int status;
3034
Kinglong Mee8c612822015-08-26 21:12:58 +08003035 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3036 FATTR4_WORD0_FH_EXPIRE_TYPE |
3037 FATTR4_WORD0_LINK_SUPPORT |
3038 FATTR4_WORD0_SYMLINK_SUPPORT |
3039 FATTR4_WORD0_ACLSUPPORT;
3040 if (minorversion)
3041 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3042
Bryan Schumaker7c513052011-03-24 17:12:24 +00003043 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044 if (status == 0) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05003045 /* Sanity check the server answers */
Kinglong Mee8c612822015-08-26 21:12:58 +08003046 switch (minorversion) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05003047 case 0:
3048 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3049 res.attr_bitmask[2] = 0;
3050 break;
3051 case 1:
3052 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3053 break;
3054 case 2:
3055 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3056 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003058 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3059 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3060 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3061 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
Trond Myklebustb944dba2013-11-04 15:20:20 -05003062 NFS_CAP_CTIME|NFS_CAP_MTIME|
3063 NFS_CAP_SECURITY_LABEL);
Malahal Naineni7dd7d952014-01-23 08:54:55 -06003064 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3065 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003066 server->caps |= NFS_CAP_ACLS;
3067 if (res.has_links != 0)
3068 server->caps |= NFS_CAP_HARDLINKS;
3069 if (res.has_symlinks != 0)
3070 server->caps |= NFS_CAP_SYMLINKS;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003071 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3072 server->caps |= NFS_CAP_FILEID;
3073 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3074 server->caps |= NFS_CAP_MODE;
3075 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3076 server->caps |= NFS_CAP_NLINK;
3077 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3078 server->caps |= NFS_CAP_OWNER;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3080 server->caps |= NFS_CAP_OWNER_GROUP;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3082 server->caps |= NFS_CAP_ATIME;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3084 server->caps |= NFS_CAP_CTIME;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3086 server->caps |= NFS_CAP_MTIME;
David Quigleyaa9c2662013-05-22 12:50:44 -04003087#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3088 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3089 server->caps |= NFS_CAP_SECURITY_LABEL;
3090#endif
3091 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3092 sizeof(server->attr_bitmask));
Trond Myklebustb944dba2013-11-04 15:20:20 -05003093 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04003094
Trond Myklebusta65318b2009-03-11 14:10:28 -04003095 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3096 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3097 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
Trond Myklebustb944dba2013-11-04 15:20:20 -05003098 server->cache_consistency_bitmask[2] = 0;
Kinglong Mee8c612822015-08-26 21:12:58 +08003099 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3100 sizeof(server->exclcreat_bitmask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003101 server->acl_bitmask = res.acl_bitmask;
Chuck Lever264e6352012-03-01 17:02:05 -05003102 server->fh_expire_type = res.fh_expire_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103 }
Andy Adamsoncccef3b2009-04-01 09:22:03 -04003104
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105 return status;
3106}
3107
Trond Myklebust55a97592006-06-09 09:34:19 -04003108int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109{
3110 struct nfs4_exception exception = { };
3111 int err;
3112 do {
3113 err = nfs4_handle_exception(server,
3114 _nfs4_server_capabilities(server, fhandle),
3115 &exception);
3116 } while (exception.retry);
3117 return err;
3118}
3119
3120static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3121 struct nfs_fsinfo *info)
3122{
David Quigleyaa9c2662013-05-22 12:50:44 -04003123 u32 bitmask[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003124 struct nfs4_lookup_root_arg args = {
David Quigleyaa9c2662013-05-22 12:50:44 -04003125 .bitmask = bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126 };
3127 struct nfs4_lookup_res res = {
3128 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04003129 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 .fh = fhandle,
3131 };
3132 struct rpc_message msg = {
3133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3134 .rpc_argp = &args,
3135 .rpc_resp = &res,
3136 };
Benny Halevy008f55d2009-04-01 09:22:50 -04003137
David Quigleyaa9c2662013-05-22 12:50:44 -04003138 bitmask[0] = nfs4_fattr_bitmap[0];
3139 bitmask[1] = nfs4_fattr_bitmap[1];
3140 /*
3141 * Process the label in the upcoming getfattr
3142 */
3143 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3144
Trond Myklebust0e574af2005-10-27 22:12:38 -04003145 nfs_fattr_init(info->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003147}
3148
3149static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3150 struct nfs_fsinfo *info)
3151{
3152 struct nfs4_exception exception = { };
3153 int err;
3154 do {
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003155 err = _nfs4_lookup_root(server, fhandle, info);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003156 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003157 switch (err) {
3158 case 0:
3159 case -NFS4ERR_WRONGSEC:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04003160 goto out;
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003161 default:
3162 err = nfs4_handle_exception(server, err, &exception);
3163 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003164 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04003165out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003166 return err;
3167}
3168
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003169static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3170 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3171{
Trond Myklebustc2190662013-08-26 19:23:04 -04003172 struct rpc_auth_create_args auth_args = {
3173 .pseudoflavor = flavor,
3174 };
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003175 struct rpc_auth *auth;
3176 int ret;
3177
Trond Myklebustc2190662013-08-26 19:23:04 -04003178 auth = rpcauth_create(&auth_args, server->client);
Wei Yongjune8d920c2012-09-21 12:27:41 +08003179 if (IS_ERR(auth)) {
Chuck Lever75bc8822013-03-16 15:55:36 -04003180 ret = -EACCES;
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003181 goto out;
3182 }
3183 ret = nfs4_lookup_root(server, fhandle, info);
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003184out:
3185 return ret;
3186}
3187
Chuck Lever9a744ba2013-03-16 15:56:02 -04003188/*
3189 * Retry pseudoroot lookup with various security flavors. We do this when:
3190 *
3191 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3192 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3193 *
3194 * Returns zero on success, or a negative NFS4ERR value, or a
3195 * negative errno value.
3196 */
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003197static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04003198 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003199{
Chuck Lever9a744ba2013-03-16 15:56:02 -04003200 /* Per 3530bis 15.33.5 */
3201 static const rpc_authflavor_t flav_array[] = {
3202 RPC_AUTH_GSS_KRB5P,
3203 RPC_AUTH_GSS_KRB5I,
3204 RPC_AUTH_GSS_KRB5,
Chuck Leverc4eafe12013-03-16 15:56:11 -04003205 RPC_AUTH_UNIX, /* courtesy */
Chuck Lever9a744ba2013-03-16 15:56:02 -04003206 RPC_AUTH_NULL,
3207 };
3208 int status = -EPERM;
3209 size_t i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04003211 if (server->auth_info.flavor_len > 0) {
3212 /* try each flavor specified by user */
3213 for (i = 0; i < server->auth_info.flavor_len; i++) {
3214 status = nfs4_lookup_root_sec(server, fhandle, info,
3215 server->auth_info.flavors[i]);
3216 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3217 continue;
3218 break;
3219 }
3220 } else {
3221 /* no flavors specified by user, try default list */
3222 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3223 status = nfs4_lookup_root_sec(server, fhandle, info,
3224 flav_array[i]);
3225 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3226 continue;
3227 break;
3228 }
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003229 }
Chuck Lever9a744ba2013-03-16 15:56:02 -04003230
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003231 /*
3232 * -EACCESS could mean that the user doesn't have correct permissions
3233 * to access the mount. It could also mean that we tried to mount
3234 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3235 * existing mount programs don't handle -EACCES very well so it should
3236 * be mapped to -EPERM instead.
3237 */
3238 if (status == -EACCES)
3239 status = -EPERM;
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003240 return status;
3241}
3242
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003243static int nfs4_do_find_root_sec(struct nfs_server *server,
3244 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3245{
3246 int mv = server->nfs_client->cl_minorversion;
3247 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3248}
3249
3250/**
3251 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3252 * @server: initialized nfs_server handle
3253 * @fhandle: we fill in the pseudo-fs root file handle
3254 * @info: we fill in an FSINFO struct
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003255 * @auth_probe: probe the auth flavours
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003256 *
3257 * Returns zero on success, or a negative errno.
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003258 */
Bryan Schumaker3028eb22012-05-10 15:07:30 -04003259int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003260 struct nfs_fsinfo *info,
3261 bool auth_probe)
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003262{
Andre Przywarac7757072015-04-23 17:17:40 +01003263 int status = 0;
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003264
Andre Przywarac7757072015-04-23 17:17:40 +01003265 if (!auth_probe)
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003266 status = nfs4_lookup_root(server, fhandle, info);
Andre Przywarac7757072015-04-23 17:17:40 +01003267
3268 if (auth_probe || status == NFS4ERR_WRONGSEC)
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003269 status = nfs4_do_find_root_sec(server, fhandle, info);
3270
Linus Torvalds1da177e2005-04-16 15:20:36 -07003271 if (status == 0)
3272 status = nfs4_server_capabilities(server, fhandle);
3273 if (status == 0)
3274 status = nfs4_do_fsinfo(server, fhandle, info);
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003275
Trond Myklebustc12e87f2006-03-13 21:20:47 -08003276 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003277}
3278
Bryan Schumakerbae36242012-05-10 15:07:31 -04003279static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3280 struct nfs_fsinfo *info)
3281{
3282 int error;
3283 struct nfs_fattr *fattr = info->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003284 struct nfs4_label *label = NULL;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003285
3286 error = nfs4_server_capabilities(server, mntfh);
3287 if (error < 0) {
3288 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3289 return error;
3290 }
3291
David Quigley14c43f72013-05-22 12:50:43 -04003292 label = nfs4_label_alloc(server, GFP_KERNEL);
3293 if (IS_ERR(label))
3294 return PTR_ERR(label);
3295
David Quigley1775fd32013-05-22 12:50:42 -04003296 error = nfs4_proc_getattr(server, mntfh, fattr, label);
Bryan Schumakerbae36242012-05-10 15:07:31 -04003297 if (error < 0) {
3298 dprintk("nfs4_get_root: getattr error = %d\n", -error);
David Quigley14c43f72013-05-22 12:50:43 -04003299 goto err_free_label;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003300 }
3301
3302 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3303 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3304 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3305
David Quigley14c43f72013-05-22 12:50:43 -04003306err_free_label:
3307 nfs4_label_free(label);
3308
Bryan Schumakerbae36242012-05-10 15:07:31 -04003309 return error;
3310}
3311
Manoj Naik6b97fd32006-06-09 09:34:29 -04003312/*
3313 * Get locations and (maybe) other attributes of a referral.
3314 * Note that we'll actually follow the referral later when
3315 * we detect fsid mismatch in inode revalidation
3316 */
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003317static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3318 const struct qstr *name, struct nfs_fattr *fattr,
3319 struct nfs_fh *fhandle)
Manoj Naik6b97fd32006-06-09 09:34:29 -04003320{
3321 int status = -ENOMEM;
3322 struct page *page = NULL;
3323 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003324
3325 page = alloc_page(GFP_KERNEL);
3326 if (page == NULL)
3327 goto out;
3328 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3329 if (locations == NULL)
3330 goto out;
3331
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003332 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003333 if (status != 0)
3334 goto out;
Chuck Lever519ae252013-10-17 14:13:19 -04003335
3336 /*
3337 * If the fsid didn't change, this is a migration event, not a
3338 * referral. Cause us to drop into the exception handler, which
3339 * will kick off migration recovery.
3340 */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003341 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Andy Adamson533eb462011-06-13 18:25:56 -04003342 dprintk("%s: server did not return a different fsid for"
3343 " a referral at %s\n", __func__, name->name);
Chuck Lever519ae252013-10-17 14:13:19 -04003344 status = -NFS4ERR_MOVED;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003345 goto out;
3346 }
Andy Adamson533eb462011-06-13 18:25:56 -04003347 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3348 nfs_fixup_referral_attributes(&locations->fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003349
Andy Adamson533eb462011-06-13 18:25:56 -04003350 /* replace the lookup nfs_fattr with the locations nfs_fattr */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003351 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
Manoj Naik6b97fd32006-06-09 09:34:29 -04003352 memset(fhandle, 0, sizeof(struct nfs_fh));
3353out:
3354 if (page)
3355 __free_page(page);
Davidlohr Bueso5d7ca352010-08-11 12:42:15 -04003356 kfree(locations);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003357 return status;
3358}
3359
David Quigley1775fd32013-05-22 12:50:42 -04003360static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362{
3363 struct nfs4_getattr_arg args = {
3364 .fh = fhandle,
3365 .bitmask = server->attr_bitmask,
3366 };
3367 struct nfs4_getattr_res res = {
3368 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04003369 .label = label,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003370 .server = server,
3371 };
3372 struct rpc_message msg = {
3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3374 .rpc_argp = &args,
3375 .rpc_resp = &res,
3376 };
David Quigleyaa9c2662013-05-22 12:50:44 -04003377
3378 args.bitmask = nfs4_bitmask(server, label);
3379
Trond Myklebust0e574af2005-10-27 22:12:38 -04003380 nfs_fattr_init(fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003381 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003382}
3383
David Quigley1775fd32013-05-22 12:50:42 -04003384static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3385 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003386{
3387 struct nfs4_exception exception = { };
3388 int err;
3389 do {
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003390 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3391 trace_nfs4_getattr(server, fhandle, fattr, err);
3392 err = nfs4_handle_exception(server, err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393 &exception);
3394 } while (exception.retry);
3395 return err;
3396}
3397
3398/*
3399 * The file is not closed if it is opened due to the a request to change
3400 * the size of the file. The open call will not be needed once the
3401 * VFS layer lookup-intents are implemented.
3402 *
3403 * Close is called when the inode is destroyed.
3404 * If we haven't opened the file for O_WRONLY, we
3405 * need to in the size_change case to obtain a stateid.
3406 *
3407 * Got race?
3408 * Because OPEN is always done by name in nfsv4, it is
3409 * possible that we opened a different file by the same
3410 * name. We can recognize this race condition, but we
3411 * can't do anything about it besides returning an error.
3412 *
3413 * This will be fixed with VFS changes (lookup-intent).
3414 */
3415static int
3416nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3417 struct iattr *sattr)
3418{
David Howells2b0143b2015-03-17 22:25:59 +00003419 struct inode *inode = d_inode(dentry);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003420 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05003421 struct nfs4_state *state = NULL;
David Quigley14c43f72013-05-22 12:50:43 -04003422 struct nfs4_label *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003423 int status;
3424
Peng Tao88ac8152014-09-12 11:04:10 +08003425 if (pnfs_ld_layoutret_on_setattr(inode) &&
3426 sattr->ia_valid & ATTR_SIZE &&
3427 sattr->ia_size < i_size_read(inode))
Trond Myklebust24028672013-03-20 13:23:33 -04003428 pnfs_commit_and_return_layout(inode);
Benny Halevy8a1636c2010-07-14 15:43:57 -04003429
Trond Myklebust0e574af2005-10-27 22:12:38 -04003430 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431
Andy Adamson26699402012-05-30 16:12:24 -04003432 /* Deal with open(O_TRUNC) */
3433 if (sattr->ia_valid & ATTR_OPEN)
Nadav Shemercc7936f2013-07-21 17:21:43 +03003434 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
Andy Adamson26699402012-05-30 16:12:24 -04003435
3436 /* Optimization: if the end result is no change, don't RPC */
Nadav Shemercc7936f2013-07-21 17:21:43 +03003437 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
Andy Adamson26699402012-05-30 16:12:24 -04003438 return 0;
3439
Trond Myklebustd5308382005-11-04 15:33:38 -05003440 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003441 if (sattr->ia_valid & ATTR_FILE) {
3442 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003443
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003444 ctx = nfs_file_open_context(sattr->ia_file);
Neil Brown504e5182008-10-16 14:15:16 +11003445 if (ctx) {
3446 cred = ctx->cred;
3447 state = ctx->state;
3448 }
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003449 }
3450
David Quigley14c43f72013-05-22 12:50:43 -04003451 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3452 if (IS_ERR(label))
3453 return PTR_ERR(label);
3454
3455 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
David Quigleyaa9c2662013-05-22 12:50:44 -04003456 if (status == 0) {
Trond Myklebustf0446362015-02-26 16:09:04 -05003457 nfs_setattr_update_inode(inode, sattr, fattr);
David Quigleyaa9c2662013-05-22 12:50:44 -04003458 nfs_setsecurity(inode, fattr, label);
3459 }
David Quigley14c43f72013-05-22 12:50:43 -04003460 nfs4_label_free(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003461 return status;
3462}
3463
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003464static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3465 const struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003466 struct nfs_fattr *fattr, struct nfs4_label *label)
David Howells2b3de442006-08-22 20:06:09 -04003467{
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003468 struct nfs_server *server = NFS_SERVER(dir);
David Howells2b3de442006-08-22 20:06:09 -04003469 int status;
3470 struct nfs4_lookup_arg args = {
3471 .bitmask = server->attr_bitmask,
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003472 .dir_fh = NFS_FH(dir),
David Howells2b3de442006-08-22 20:06:09 -04003473 .name = name,
3474 };
3475 struct nfs4_lookup_res res = {
3476 .server = server,
3477 .fattr = fattr,
David Quigleyaa9c2662013-05-22 12:50:44 -04003478 .label = label,
David Howells2b3de442006-08-22 20:06:09 -04003479 .fh = fhandle,
3480 };
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3483 .rpc_argp = &args,
3484 .rpc_resp = &res,
3485 };
3486
David Quigleyaa9c2662013-05-22 12:50:44 -04003487 args.bitmask = nfs4_bitmask(server, label);
3488
David Howells2b3de442006-08-22 20:06:09 -04003489 nfs_fattr_init(fattr);
3490
Linus Torvalds1da177e2005-04-16 15:20:36 -07003491 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003492 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493 dprintk("NFS reply lookup: %d\n", status);
3494 return status;
3495}
3496
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003497static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003498{
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003499 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003500 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003501 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3502 fattr->nlink = 2;
3503}
3504
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003505static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3506 struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003507 struct nfs_fattr *fattr, struct nfs4_label *label)
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003508{
3509 struct nfs4_exception exception = { };
3510 struct rpc_clnt *client = *clnt;
3511 int err;
3512 do {
David Quigley1775fd32013-05-22 12:50:42 -04003513 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003514 trace_nfs4_lookup(dir, name, err);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003515 switch (err) {
3516 case -NFS4ERR_BADNAME:
3517 err = -ENOENT;
3518 goto out;
3519 case -NFS4ERR_MOVED:
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003520 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
Dominique Martinetc86c90c2015-06-04 17:04:17 +02003521 if (err == -NFS4ERR_MOVED)
3522 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003523 goto out;
3524 case -NFS4ERR_WRONGSEC:
3525 err = -EPERM;
3526 if (client != *clnt)
3527 goto out;
Andy Adamson66b06862014-06-12 15:02:32 -04003528 client = nfs4_negotiate_security(client, dir, name);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003529 if (IS_ERR(client))
3530 return PTR_ERR(client);
3531
3532 exception.retry = 1;
3533 break;
3534 default:
3535 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3536 }
3537 } while (exception.retry);
3538
3539out:
3540 if (err == 0)
3541 *clnt = client;
3542 else if (client != *clnt)
3543 rpc_shutdown_client(client);
3544
3545 return err;
3546}
3547
Bryan Schumaker80a16b22012-04-27 13:27:46 -04003548static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
David Quigley1775fd32013-05-22 12:50:42 -04003549 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3550 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003551{
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003552 int status;
3553 struct rpc_clnt *client = NFS_CLIENT(dir);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003554
David Quigley1775fd32013-05-22 12:50:42 -04003555 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003556 if (client != NFS_CLIENT(dir)) {
3557 rpc_shutdown_client(client);
3558 nfs_fixup_secinfo_attributes(fattr);
3559 }
3560 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003561}
3562
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003563struct rpc_clnt *
3564nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3565 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3566{
Trond Myklebustb72888c2013-08-07 20:38:07 -04003567 struct rpc_clnt *client = NFS_CLIENT(dir);
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003568 int status;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003569
David Quigley1775fd32013-05-22 12:50:42 -04003570 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003571 if (status < 0)
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003572 return ERR_PTR(status);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003573 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003574}
3575
Linus Torvalds1da177e2005-04-16 15:20:36 -07003576static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3577{
Trond Myklebust76b32992007-08-10 17:45:11 -04003578 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003579 struct nfs4_accessargs args = {
3580 .fh = NFS_FH(inode),
Trond Myklebusta4980e72012-01-30 15:43:56 -05003581 .bitmask = server->cache_consistency_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582 };
Trond Myklebust76b32992007-08-10 17:45:11 -04003583 struct nfs4_accessres res = {
3584 .server = server,
Trond Myklebust76b32992007-08-10 17:45:11 -04003585 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3588 .rpc_argp = &args,
3589 .rpc_resp = &res,
3590 .rpc_cred = entry->cred,
3591 };
3592 int mode = entry->mask;
David Quigleyaa9c2662013-05-22 12:50:44 -04003593 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003594
3595 /*
3596 * Determine which access bits we want to ask for...
3597 */
3598 if (mode & MAY_READ)
3599 args.access |= NFS4_ACCESS_READ;
3600 if (S_ISDIR(inode->i_mode)) {
3601 if (mode & MAY_WRITE)
3602 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3603 if (mode & MAY_EXEC)
3604 args.access |= NFS4_ACCESS_LOOKUP;
3605 } else {
3606 if (mode & MAY_WRITE)
3607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3608 if (mode & MAY_EXEC)
3609 args.access |= NFS4_ACCESS_EXECUTE;
3610 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003611
3612 res.fattr = nfs_alloc_fattr();
3613 if (res.fattr == NULL)
3614 return -ENOMEM;
3615
Bryan Schumaker7c513052011-03-24 17:12:24 +00003616 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003617 if (!status) {
Weston Andros Adamson6168f622012-09-10 14:00:46 -04003618 nfs_access_set_mask(entry, res.access);
Trond Myklebustc407d412010-04-16 16:22:48 -04003619 nfs_refresh_inode(inode, res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003621 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003622 return status;
3623}
3624
3625static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3626{
3627 struct nfs4_exception exception = { };
3628 int err;
3629 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003630 err = _nfs4_proc_access(inode, entry);
3631 trace_nfs4_access(inode, err);
3632 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003633 &exception);
3634 } while (exception.retry);
3635 return err;
3636}
3637
3638/*
3639 * TODO: For the time being, we don't try to get any attributes
3640 * along with any of the zero-copy operations READ, READDIR,
3641 * READLINK, WRITE.
3642 *
3643 * In the case of the first three, we want to put the GETATTR
3644 * after the read-type operation -- this is because it is hard
3645 * to predict the length of a GETATTR response in v4, and thus
3646 * align the READ data correctly. This means that the GETATTR
3647 * may end up partially falling into the page cache, and we should
3648 * shift it into the 'tail' of the xdr_buf before processing.
3649 * To do this efficiently, we need to know the total length
3650 * of data received, which doesn't seem to be available outside
3651 * of the RPC layer.
3652 *
3653 * In the case of WRITE, we also want to put the GETATTR after
3654 * the operation -- in this case because we want to make sure
Trond Myklebust140150d2012-06-05 15:20:25 -04003655 * we get the post-operation mtime and size.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003656 *
3657 * Both of these changes to the XDR layer would in fact be quite
3658 * minor, but I decided to leave them for a subsequent patch.
3659 */
3660static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3661 unsigned int pgbase, unsigned int pglen)
3662{
3663 struct nfs4_readlink args = {
3664 .fh = NFS_FH(inode),
3665 .pgbase = pgbase,
3666 .pglen = pglen,
3667 .pages = &page,
3668 };
Benny Halevyf50c7002009-04-01 09:21:55 -04003669 struct nfs4_readlink_res res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670 struct rpc_message msg = {
3671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3672 .rpc_argp = &args,
Benny Halevyf50c7002009-04-01 09:21:55 -04003673 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674 };
3675
Bryan Schumaker7c513052011-03-24 17:12:24 +00003676 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 -07003677}
3678
3679static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3680 unsigned int pgbase, unsigned int pglen)
3681{
3682 struct nfs4_exception exception = { };
3683 int err;
3684 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003685 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3686 trace_nfs4_readlink(inode, err);
3687 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 &exception);
3689 } while (exception.retry);
3690 return err;
3691}
3692
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693/*
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003694 * This is just for mknod. open(O_CREAT) will always do ->open_context().
Linus Torvalds1da177e2005-04-16 15:20:36 -07003695 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003696static int
3697nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003698 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699{
David Quigleyaa9c2662013-05-22 12:50:44 -04003700 struct nfs4_label l, *ilabel = NULL;
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003701 struct nfs_open_context *ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703 int status = 0;
3704
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003705 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3706 if (IS_ERR(ctx))
3707 return PTR_ERR(ctx);
3708
David Quigleyaa9c2662013-05-22 12:50:44 -04003709 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3710
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003711 sattr->ia_mode &= ~current_umask();
Kinglong Meec5c3fb52015-08-26 21:11:39 +08003712 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003713 if (IS_ERR(state)) {
3714 status = PTR_ERR(state);
Trond Myklebustc0204fd2010-09-17 10:56:51 -04003715 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003716 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717out:
David Quigleyaa9c2662013-05-22 12:50:44 -04003718 nfs4_label_release_security(ilabel);
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003719 put_nfs_open_context(ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720 return status;
3721}
3722
3723static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3724{
Trond Myklebust16e42952005-10-27 22:12:44 -04003725 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003726 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727 .fh = NFS_FH(dir),
Linus Torvalds26fe5752012-05-10 13:14:12 -07003728 .name = *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003730 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04003731 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04003732 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003733 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3735 .rpc_argp = &args,
3736 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003737 };
Trond Myklebust778d2812012-04-27 13:48:19 -04003738 int status;
Trond Myklebustd3468902010-04-16 16:22:50 -04003739
Bryan Schumaker7c513052011-03-24 17:12:24 +00003740 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
Trond Myklebust778d2812012-04-27 13:48:19 -04003741 if (status == 0)
Trond Myklebust16e42952005-10-27 22:12:44 -04003742 update_changeattr(dir, &res.cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003743 return status;
3744}
3745
3746static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3747{
3748 struct nfs4_exception exception = { };
3749 int err;
3750 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003751 err = _nfs4_proc_remove(dir, name);
3752 trace_nfs4_remove(dir, name, err);
3753 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003754 &exception);
3755 } while (exception.retry);
3756 return err;
3757}
3758
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003759static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003760{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003761 struct nfs_server *server = NFS_SERVER(dir);
3762 struct nfs_removeargs *args = msg->rpc_argp;
3763 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003764
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003765 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Chuck Levera9c92d62013-08-09 12:48:18 -04003767 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04003768
3769 nfs_fattr_init(res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770}
3771
Bryan Schumaker34e137c2012-03-19 14:54:41 -04003772static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3773{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003774 nfs4_setup_sequence(NFS_SERVER(data->dir),
3775 &data->args.seq_args,
3776 &data->res.seq_res,
3777 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003778}
3779
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003780static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781{
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003782 struct nfs_unlinkdata *data = task->tk_calldata;
3783 struct nfs_removeres *res = &data->res;
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003784
Trond Myklebust14516c32010-07-31 14:29:06 -04003785 if (!nfs4_sequence_done(task, &res->seq_res))
3786 return 0;
NeilBrown8478eaa2014-09-18 16:09:27 +10003787 if (nfs4_async_handle_error(task, res->server, NULL,
3788 &data->timeout) == -EAGAIN)
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003789 return 0;
3790 update_changeattr(dir, &res->cinfo);
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003791 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792}
3793
Jeff Laytond3d41522010-09-17 17:31:57 -04003794static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3795{
3796 struct nfs_server *server = NFS_SERVER(dir);
3797 struct nfs_renameargs *arg = msg->rpc_argp;
3798 struct nfs_renameres *res = msg->rpc_resp;
3799
3800 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
Jeff Laytond3d41522010-09-17 17:31:57 -04003801 res->server = server;
Chuck Levera9c92d62013-08-09 12:48:18 -04003802 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
Jeff Laytond3d41522010-09-17 17:31:57 -04003803}
3804
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04003805static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3806{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003807 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3808 &data->args.seq_args,
3809 &data->res.seq_res,
3810 task);
Jeff Laytond3d41522010-09-17 17:31:57 -04003811}
3812
3813static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3814 struct inode *new_dir)
3815{
Trond Myklebustfbc6f7c2013-08-12 17:08:26 -04003816 struct nfs_renamedata *data = task->tk_calldata;
3817 struct nfs_renameres *res = &data->res;
Jeff Laytond3d41522010-09-17 17:31:57 -04003818
3819 if (!nfs4_sequence_done(task, &res->seq_res))
3820 return 0;
NeilBrown8478eaa2014-09-18 16:09:27 +10003821 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
Jeff Laytond3d41522010-09-17 17:31:57 -04003822 return 0;
3823
3824 update_changeattr(old_dir, &res->old_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003825 update_changeattr(new_dir, &res->new_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003826 return 1;
3827}
3828
Linus Torvalds1da177e2005-04-16 15:20:36 -07003829static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3830{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003831 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003832 struct nfs4_link_arg arg = {
3833 .fh = NFS_FH(inode),
3834 .dir_fh = NFS_FH(dir),
3835 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003836 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003838 struct nfs4_link_res res = {
3839 .server = server,
David Quigley1775fd32013-05-22 12:50:42 -04003840 .label = NULL,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003841 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003842 struct rpc_message msg = {
3843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3844 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003845 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003846 };
Trond Myklebust136f2622010-04-16 16:22:49 -04003847 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848
Trond Myklebust136f2622010-04-16 16:22:49 -04003849 res.fattr = nfs_alloc_fattr();
Trond Myklebust778d2812012-04-27 13:48:19 -04003850 if (res.fattr == NULL)
Trond Myklebust136f2622010-04-16 16:22:49 -04003851 goto out;
3852
David Quigley14c43f72013-05-22 12:50:43 -04003853 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3854 if (IS_ERR(res.label)) {
3855 status = PTR_ERR(res.label);
3856 goto out;
3857 }
David Quigleyaa9c2662013-05-22 12:50:44 -04003858 arg.bitmask = nfs4_bitmask(server, res.label);
David Quigley14c43f72013-05-22 12:50:43 -04003859
Bryan Schumaker7c513052011-03-24 17:12:24 +00003860 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003861 if (!status) {
3862 update_changeattr(dir, &res.cinfo);
David Quigleyaa9c2662013-05-22 12:50:44 -04003863 status = nfs_post_op_update_inode(inode, res.fattr);
3864 if (!status)
3865 nfs_setsecurity(inode, res.fattr, res.label);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003866 }
David Quigley14c43f72013-05-22 12:50:43 -04003867
3868
3869 nfs4_label_free(res.label);
3870
Trond Myklebust136f2622010-04-16 16:22:49 -04003871out:
Trond Myklebust136f2622010-04-16 16:22:49 -04003872 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873 return status;
3874}
3875
3876static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3877{
3878 struct nfs4_exception exception = { };
3879 int err;
3880 do {
3881 err = nfs4_handle_exception(NFS_SERVER(inode),
3882 _nfs4_proc_link(inode, dir, name),
3883 &exception);
3884 } while (exception.retry);
3885 return err;
3886}
3887
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003888struct nfs4_createdata {
3889 struct rpc_message msg;
3890 struct nfs4_create_arg arg;
3891 struct nfs4_create_res res;
3892 struct nfs_fh fh;
3893 struct nfs_fattr fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003894 struct nfs4_label *label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003895};
3896
3897static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3898 struct qstr *name, struct iattr *sattr, u32 ftype)
3899{
3900 struct nfs4_createdata *data;
3901
3902 data = kzalloc(sizeof(*data), GFP_KERNEL);
3903 if (data != NULL) {
3904 struct nfs_server *server = NFS_SERVER(dir);
3905
David Quigley14c43f72013-05-22 12:50:43 -04003906 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3907 if (IS_ERR(data->label))
3908 goto out_free;
3909
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003910 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3911 data->msg.rpc_argp = &data->arg;
3912 data->msg.rpc_resp = &data->res;
3913 data->arg.dir_fh = NFS_FH(dir);
3914 data->arg.server = server;
3915 data->arg.name = name;
3916 data->arg.attrs = sattr;
3917 data->arg.ftype = ftype;
David Quigleyaa9c2662013-05-22 12:50:44 -04003918 data->arg.bitmask = nfs4_bitmask(server, data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003919 data->res.server = server;
3920 data->res.fh = &data->fh;
3921 data->res.fattr = &data->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003922 data->res.label = data->label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003923 nfs_fattr_init(data->res.fattr);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003924 }
3925 return data;
David Quigley14c43f72013-05-22 12:50:43 -04003926out_free:
3927 kfree(data);
3928 return NULL;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003929}
3930
3931static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3932{
Bryan Schumaker7c513052011-03-24 17:12:24 +00003933 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
Bryan Schumakere73b83f2011-03-24 17:12:23 +00003934 &data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003935 if (status == 0) {
3936 update_changeattr(dir, &data->res.dir_cinfo);
David Quigley1775fd32013-05-22 12:50:42 -04003937 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003938 }
3939 return status;
3940}
3941
3942static void nfs4_free_createdata(struct nfs4_createdata *data)
3943{
David Quigley14c43f72013-05-22 12:50:43 -04003944 nfs4_label_free(data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003945 kfree(data);
3946}
3947
Chuck Lever4f390c12006-08-22 20:06:22 -04003948static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003949 struct page *page, unsigned int len, struct iattr *sattr,
3950 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003951{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003952 struct nfs4_createdata *data;
3953 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954
Chuck Lever94a6d752006-08-22 20:06:23 -04003955 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003956 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04003957
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003958 status = -ENOMEM;
3959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3960 if (data == NULL)
3961 goto out;
3962
3963 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3964 data->arg.u.symlink.pages = &page;
3965 data->arg.u.symlink.len = len;
David Quigley1775fd32013-05-22 12:50:42 -04003966 data->arg.label = label;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003967
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003968 status = nfs4_do_create(dir, dentry, data);
3969
3970 nfs4_free_createdata(data);
3971out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003972 return status;
3973}
3974
Chuck Lever4f390c12006-08-22 20:06:22 -04003975static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04003976 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003977{
3978 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003979 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980 int err;
David Quigleyaa9c2662013-05-22 12:50:44 -04003981
3982 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3983
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003985 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3986 trace_nfs4_symlink(dir, &dentry->d_name, err);
3987 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003988 &exception);
3989 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003990
3991 nfs4_label_release_security(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003992 return err;
3993}
3994
3995static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003996 struct iattr *sattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003997{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003998 struct nfs4_createdata *data;
3999 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004000
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4002 if (data == NULL)
4003 goto out;
4004
David Quigley1775fd32013-05-22 12:50:42 -04004005 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004006 status = nfs4_do_create(dir, dentry, data);
4007
4008 nfs4_free_createdata(data);
4009out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004010 return status;
4011}
4012
4013static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4014 struct iattr *sattr)
4015{
4016 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04004017 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004019
David Quigleyaa9c2662013-05-22 12:50:44 -04004020 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4021
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004022 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004023 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04004024 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4025 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4026 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004027 &exception);
4028 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04004029 nfs4_label_release_security(label);
4030
Linus Torvalds1da177e2005-04-16 15:20:36 -07004031 return err;
4032}
4033
4034static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004035 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004036{
David Howells2b0143b2015-03-17 22:25:59 +00004037 struct inode *dir = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004038 struct nfs4_readdir_arg args = {
4039 .fh = NFS_FH(dir),
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004040 .pages = pages,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004041 .pgbase = 0,
4042 .count = count,
David Howells2b0143b2015-03-17 22:25:59 +00004043 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
Bryan Schumaker82f2e542010-10-21 16:33:18 -04004044 .plus = plus,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004045 };
4046 struct nfs4_readdir_res res;
4047 struct rpc_message msg = {
4048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4049 .rpc_argp = &args,
4050 .rpc_resp = &res,
4051 .rpc_cred = cred,
4052 };
4053 int status;
4054
Al Viro6de14722013-09-16 10:53:17 -04004055 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4056 dentry,
Trond Myklebusteadf4592005-06-22 17:16:39 +00004057 (unsigned long long)cookie);
Trond Myklebustc3f52af2012-09-03 14:56:02 -04004058 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004059 res.pgbase = args.pgbase;
Bryan Schumaker7c513052011-03-24 17:12:24 +00004060 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 -05004061 if (status >= 0) {
Trond Myklebustc3f52af2012-09-03 14:56:02 -04004062 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustac396122010-11-15 20:26:22 -05004063 status += args.pgbase;
4064 }
Trond Myklebustc4812992007-09-28 17:11:45 -04004065
4066 nfs_invalidate_atime(dir);
4067
Harvey Harrison3110ff82008-05-02 13:42:44 -07004068 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069 return status;
4070}
4071
4072static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04004073 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004074{
4075 struct nfs4_exception exception = { };
4076 int err;
4077 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004078 err = _nfs4_proc_readdir(dentry, cred, cookie,
4079 pages, count, plus);
David Howells2b0143b2015-03-17 22:25:59 +00004080 trace_nfs4_readdir(d_inode(dentry), err);
4081 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004082 &exception);
4083 } while (exception.retry);
4084 return err;
4085}
4086
4087static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
David Quigleyaa9c2662013-05-22 12:50:44 -04004088 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004089{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004090 struct nfs4_createdata *data;
4091 int mode = sattr->ia_mode;
4092 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004094 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4095 if (data == NULL)
4096 goto out;
4097
Linus Torvalds1da177e2005-04-16 15:20:36 -07004098 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004099 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004100 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004101 data->arg.ftype = NF4BLK;
4102 data->arg.u.device.specdata1 = MAJOR(rdev);
4103 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004104 }
4105 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004106 data->arg.ftype = NF4CHR;
4107 data->arg.u.device.specdata1 = MAJOR(rdev);
4108 data->arg.u.device.specdata2 = MINOR(rdev);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04004109 } else if (!S_ISSOCK(mode)) {
4110 status = -EINVAL;
4111 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004112 }
David Quigley1775fd32013-05-22 12:50:42 -04004113
David Quigleyaa9c2662013-05-22 12:50:44 -04004114 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004115 status = nfs4_do_create(dir, dentry, data);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04004116out_free:
Trond Myklebust57dc9a52008-06-20 15:35:32 -04004117 nfs4_free_createdata(data);
4118out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004119 return status;
4120}
4121
4122static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4123 struct iattr *sattr, dev_t rdev)
4124{
4125 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04004126 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004127 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004128
David Quigleyaa9c2662013-05-22 12:50:44 -04004129 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4130
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00004131 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004132 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04004133 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4134 trace_nfs4_mknod(dir, &dentry->d_name, err);
4135 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004136 &exception);
4137 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04004138
4139 nfs4_label_release_security(label);
4140
Linus Torvalds1da177e2005-04-16 15:20:36 -07004141 return err;
4142}
4143
4144static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4145 struct nfs_fsstat *fsstat)
4146{
4147 struct nfs4_statfs_arg args = {
4148 .fh = fhandle,
4149 .bitmask = server->attr_bitmask,
4150 };
Benny Halevy24ad1482009-04-01 09:21:56 -04004151 struct nfs4_statfs_res res = {
4152 .fsstat = fsstat,
4153 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004154 struct rpc_message msg = {
4155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4156 .rpc_argp = &args,
Benny Halevy24ad1482009-04-01 09:21:56 -04004157 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004158 };
4159
Trond Myklebust0e574af2005-10-27 22:12:38 -04004160 nfs_fattr_init(fsstat->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004161 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004162}
4163
4164static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4165{
4166 struct nfs4_exception exception = { };
4167 int err;
4168 do {
4169 err = nfs4_handle_exception(server,
4170 _nfs4_proc_statfs(server, fhandle, fsstat),
4171 &exception);
4172 } while (exception.retry);
4173 return err;
4174}
4175
4176static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4177 struct nfs_fsinfo *fsinfo)
4178{
4179 struct nfs4_fsinfo_arg args = {
4180 .fh = fhandle,
4181 .bitmask = server->attr_bitmask,
4182 };
Benny Halevy3dda5e42009-04-01 09:21:57 -04004183 struct nfs4_fsinfo_res res = {
4184 .fsinfo = fsinfo,
4185 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004186 struct rpc_message msg = {
4187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4188 .rpc_argp = &args,
Benny Halevy3dda5e42009-04-01 09:21:57 -04004189 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190 };
4191
Bryan Schumaker7c513052011-03-24 17:12:24 +00004192 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193}
4194
4195static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4196{
4197 struct nfs4_exception exception = { };
Chuck Lever83ca7f52013-03-16 15:55:53 -04004198 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004199 int err;
4200
4201 do {
Chuck Lever83ca7f52013-03-16 15:55:53 -04004202 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04004203 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
Chuck Lever83ca7f52013-03-16 15:55:53 -04004204 if (err == 0) {
4205 struct nfs_client *clp = server->nfs_client;
4206
4207 spin_lock(&clp->cl_lock);
4208 clp->cl_lease_time = fsinfo->lease_time * HZ;
4209 clp->cl_last_renewal = now;
4210 spin_unlock(&clp->cl_lock);
4211 break;
4212 }
4213 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004214 } while (exception.retry);
4215 return err;
4216}
4217
4218static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4219{
Bryan Schumakere38eb652012-06-20 15:53:40 -04004220 int error;
4221
Trond Myklebust0e574af2005-10-27 22:12:38 -04004222 nfs_fattr_init(fsinfo->fattr);
Bryan Schumakere38eb652012-06-20 15:53:40 -04004223 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
Peng Taodc182542012-08-24 00:27:49 +08004224 if (error == 0) {
4225 /* block layout checks this! */
4226 server->pnfs_blksize = fsinfo->blksize;
Bryan Schumakere38eb652012-06-20 15:53:40 -04004227 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
Peng Taodc182542012-08-24 00:27:49 +08004228 }
Bryan Schumakere38eb652012-06-20 15:53:40 -04004229
4230 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231}
4232
4233static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4234 struct nfs_pathconf *pathconf)
4235{
4236 struct nfs4_pathconf_arg args = {
4237 .fh = fhandle,
4238 .bitmask = server->attr_bitmask,
4239 };
Benny Halevyd45b2982009-04-01 09:21:58 -04004240 struct nfs4_pathconf_res res = {
4241 .pathconf = pathconf,
4242 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243 struct rpc_message msg = {
4244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4245 .rpc_argp = &args,
Benny Halevyd45b2982009-04-01 09:21:58 -04004246 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004247 };
4248
4249 /* None of the pathconf attributes are mandatory to implement */
4250 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4251 memset(pathconf, 0, sizeof(*pathconf));
4252 return 0;
4253 }
4254
Trond Myklebust0e574af2005-10-27 22:12:38 -04004255 nfs_fattr_init(pathconf->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004256 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004257}
4258
4259static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4260 struct nfs_pathconf *pathconf)
4261{
4262 struct nfs4_exception exception = { };
4263 int err;
4264
4265 do {
4266 err = nfs4_handle_exception(server,
4267 _nfs4_proc_pathconf(server, fhandle, pathconf),
4268 &exception);
4269 } while (exception.retry);
4270 return err;
4271}
4272
Trond Myklebust5521abf2013-03-16 20:54:34 -04004273int nfs4_set_rw_stateid(nfs4_stateid *stateid,
Trond Myklebust9b206142013-03-17 15:52:00 -04004274 const struct nfs_open_context *ctx,
4275 const struct nfs_lock_context *l_ctx,
4276 fmode_t fmode)
4277{
4278 const struct nfs_lockowner *lockowner = NULL;
4279
4280 if (l_ctx != NULL)
4281 lockowner = &l_ctx->lockowner;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004282 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
Trond Myklebust9b206142013-03-17 15:52:00 -04004283}
4284EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4285
Trond Myklebust5521abf2013-03-16 20:54:34 -04004286static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4287 const struct nfs_open_context *ctx,
4288 const struct nfs_lock_context *l_ctx,
4289 fmode_t fmode)
4290{
4291 nfs4_stateid current_stateid;
4292
Trond Myklebuste1253be2014-03-05 08:44:23 -05004293 /* If the current stateid represents a lost lock, then exit */
4294 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4295 return true;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004296 return nfs4_stateid_match(stateid, &current_stateid);
4297}
4298
4299static bool nfs4_error_stateid_expired(int err)
4300{
4301 switch (err) {
4302 case -NFS4ERR_DELEG_REVOKED:
4303 case -NFS4ERR_ADMIN_REVOKED:
4304 case -NFS4ERR_BAD_STATEID:
4305 case -NFS4ERR_STALE_STATEID:
4306 case -NFS4ERR_OLD_STATEID:
4307 case -NFS4ERR_OPENMODE:
4308 case -NFS4ERR_EXPIRED:
4309 return true;
4310 }
4311 return false;
4312}
4313
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004314void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
Benny Halevyd20581a2011-05-22 19:52:03 +03004315{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004316 nfs_invalidate_atime(hdr->inode);
Benny Halevyd20581a2011-05-22 19:52:03 +03004317}
4318
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004319static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004321 struct nfs_server *server = NFS_SERVER(hdr->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004323 trace_nfs4_read(hdr, task->tk_status);
4324 if (nfs4_async_handle_error(task, server,
NeilBrown8478eaa2014-09-18 16:09:27 +10004325 hdr->args.context->state,
4326 NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004327 rpc_restart_call_prepare(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05004328 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004329 }
Trond Myklebust8850df92007-09-28 17:20:07 -04004330
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004331 __nfs4_read_done_cb(hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332 if (task->tk_status > 0)
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004333 renew_lease(server, hdr->timestamp);
Trond Myklebustec06c092006-03-20 13:44:27 -05004334 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004335}
4336
Trond Myklebust5521abf2013-03-16 20:54:34 -04004337static bool nfs4_read_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004338 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004339{
4340
4341 if (!nfs4_error_stateid_expired(task->tk_status) ||
4342 nfs4_stateid_is_current(&args->stateid,
4343 args->context,
4344 args->lock_context,
4345 FMODE_READ))
4346 return false;
4347 rpc_restart_call_prepare(task);
4348 return true;
4349}
4350
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004351static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004352{
4353
4354 dprintk("--> %s\n", __func__);
4355
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004356 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004357 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004358 if (nfs4_read_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004359 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004360 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4361 nfs4_read_done_cb(task, hdr);
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004362}
4363
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004364static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4365 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004366{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004367 hdr->timestamp = jiffies;
4368 hdr->pgio_done_cb = nfs4_read_done_cb;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004369 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004370 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004371}
4372
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004373static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4374 struct nfs_pgio_header *hdr)
Bryan Schumakerea7c3302012-03-19 14:54:40 -04004375{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004376 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4377 &hdr->args.seq_args,
4378 &hdr->res.seq_res,
Trond Myklebust9b206142013-03-17 15:52:00 -04004379 task))
NeilBrownef1820f2013-09-04 17:04:49 +10004380 return 0;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004381 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4382 hdr->args.lock_context,
4383 hdr->rw_ops->rw_mode) == -EIO)
NeilBrownef1820f2013-09-04 17:04:49 +10004384 return -EIO;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004385 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
NeilBrownef1820f2013-09-04 17:04:49 +10004386 return -EIO;
4387 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388}
4389
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004390static int nfs4_write_done_cb(struct rpc_task *task,
4391 struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004393 struct inode *inode = hdr->inode;
NeilBrown8478eaa2014-09-18 16:09:27 +10004394
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004395 trace_nfs4_write(hdr, task->tk_status);
4396 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
NeilBrown8478eaa2014-09-18 16:09:27 +10004397 hdr->args.context->state,
4398 NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004399 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004400 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004401 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004402 if (task->tk_status >= 0) {
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004403 renew_lease(NFS_SERVER(inode), hdr->timestamp);
Trond Myklebusta08a8cd2015-02-26 17:36:09 -05004404 nfs_writeback_update_inode(hdr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004405 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004406 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407}
4408
Trond Myklebust5521abf2013-03-16 20:54:34 -04004409static bool nfs4_write_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004410 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004411{
4412
4413 if (!nfs4_error_stateid_expired(task->tk_status) ||
4414 nfs4_stateid_is_current(&args->stateid,
4415 args->context,
4416 args->lock_context,
4417 FMODE_WRITE))
4418 return false;
4419 rpc_restart_call_prepare(task);
4420 return true;
4421}
4422
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004423static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Fred Isamanb029bc92011-03-03 15:13:42 +00004424{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004425 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Fred Isamanb029bc92011-03-03 15:13:42 +00004426 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004427 if (nfs4_write_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004428 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004429 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4430 nfs4_write_done_cb(task, hdr);
Fred Isamanb029bc92011-03-03 15:13:42 +00004431}
4432
Trond Myklebust5a37f852012-04-28 14:55:16 -04004433static
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004434bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
Fred Isamana69aef12011-03-03 15:13:47 +00004435{
Trond Myklebust5a37f852012-04-28 14:55:16 -04004436 /* Don't request attributes for pNFS or O_DIRECT writes */
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004437 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
Trond Myklebust5a37f852012-04-28 14:55:16 -04004438 return false;
4439 /* Otherwise, request attributes if and only if we don't hold
4440 * a delegation
4441 */
Bryan Schumaker011e2a72012-06-20 15:53:43 -04004442 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
Fred Isamana69aef12011-03-03 15:13:47 +00004443}
Fred Isamana69aef12011-03-03 15:13:47 +00004444
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004445static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4446 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004447{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004448 struct nfs_server *server = NFS_SERVER(hdr->inode);
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004449
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004450 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4451 hdr->args.bitmask = NULL;
4452 hdr->res.fattr = NULL;
Fred Isaman7ffd1062011-03-03 15:13:46 +00004453 } else
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004454 hdr->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust5a37f852012-04-28 14:55:16 -04004455
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004456 if (!hdr->pgio_done_cb)
4457 hdr->pgio_done_cb = nfs4_write_done_cb;
4458 hdr->res.server = server;
4459 hdr->timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004460
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004462 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004463}
4464
Fred Isaman0b7c0152012-04-20 14:47:39 -04004465static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4466{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04004467 nfs4_setup_sequence(NFS_SERVER(data->inode),
4468 &data->args.seq_args,
4469 &data->res.seq_res,
4470 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004471}
4472
Fred Isaman0b7c0152012-04-20 14:47:39 -04004473static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004474{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004475 struct inode *inode = data->inode;
Trond Myklebust14516c32010-07-31 14:29:06 -04004476
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004477 trace_nfs4_commit(data, task->tk_status);
NeilBrown8478eaa2014-09-18 16:09:27 +10004478 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4479 NULL, NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004480 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004481 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004482 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004483 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484}
4485
Fred Isaman0b7c0152012-04-20 14:47:39 -04004486static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
Fred Isaman5f452432011-03-23 13:27:46 +00004487{
4488 if (!nfs4_sequence_done(task, &data->res.seq_res))
4489 return -EAGAIN;
Fred Isaman0b7c0152012-04-20 14:47:39 -04004490 return data->commit_done_cb(task, data);
Fred Isaman5f452432011-03-23 13:27:46 +00004491}
4492
Fred Isaman0b7c0152012-04-20 14:47:39 -04004493static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004494{
Trond Myklebust788e7a82006-03-20 13:44:27 -05004495 struct nfs_server *server = NFS_SERVER(data->inode);
Fred Isaman988b6dc2011-03-23 13:27:52 +00004496
Fred Isaman0b7c0152012-04-20 14:47:39 -04004497 if (data->commit_done_cb == NULL)
4498 data->commit_done_cb = nfs4_commit_done_cb;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004499 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004500 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Chuck Levera9c92d62013-08-09 12:48:18 -04004501 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004502}
4503
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004504struct nfs4_renewdata {
4505 struct nfs_client *client;
4506 unsigned long timestamp;
4507};
4508
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509/*
4510 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4511 * standalone procedure for queueing an asynchronous RENEW.
4512 */
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004513static void nfs4_renew_release(void *calldata)
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004514{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004515 struct nfs4_renewdata *data = calldata;
4516 struct nfs_client *clp = data->client;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004517
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004518 if (atomic_read(&clp->cl_count) > 1)
4519 nfs4_schedule_state_renewal(clp);
4520 nfs_put_client(clp);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004521 kfree(data);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004522}
4523
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004524static void nfs4_renew_done(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004525{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004526 struct nfs4_renewdata *data = calldata;
4527 struct nfs_client *clp = data->client;
4528 unsigned long timestamp = data->timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004529
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004530 trace_nfs4_renew_async(clp, task->tk_status);
Chuck Leverf8aba1e2013-10-17 14:13:53 -04004531 switch (task->tk_status) {
4532 case 0:
4533 break;
4534 case -NFS4ERR_LEASE_MOVED:
4535 nfs4_schedule_lease_moved_recovery(clp);
4536 break;
4537 default:
Trond Myklebust95baa252009-05-26 14:51:00 -04004538 /* Unless we're shutting down, schedule state recovery! */
Trond Myklebust042b60b2011-08-24 15:07:37 -04004539 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4540 return;
4541 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004542 nfs4_schedule_lease_recovery(clp);
Trond Myklebust042b60b2011-08-24 15:07:37 -04004543 return;
4544 }
4545 nfs4_schedule_path_down_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004546 }
Trond Myklebust452e9352010-07-31 14:29:06 -04004547 do_renew_lease(clp, timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548}
4549
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004550static const struct rpc_call_ops nfs4_renew_ops = {
4551 .rpc_call_done = nfs4_renew_done,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004552 .rpc_release = nfs4_renew_release,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004553};
4554
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004555static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004556{
4557 struct rpc_message msg = {
4558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4559 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004560 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004561 };
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004562 struct nfs4_renewdata *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004563
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004564 if (renew_flags == 0)
4565 return 0;
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004566 if (!atomic_inc_not_zero(&clp->cl_count))
4567 return -EIO;
Trond Myklebustb569ad32011-08-24 15:07:35 -04004568 data = kmalloc(sizeof(*data), GFP_NOFS);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004569 if (data == NULL)
4570 return -ENOMEM;
4571 data->client = clp;
4572 data->timestamp = jiffies;
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004573 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004574 &nfs4_renew_ops, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004575}
4576
Trond Myklebust8534d4e2011-08-24 15:07:37 -04004577static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578{
4579 struct rpc_message msg = {
4580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4581 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004582 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004583 };
4584 unsigned long now = jiffies;
4585 int status;
4586
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004588 if (status < 0)
4589 return status;
Trond Myklebust452e9352010-07-31 14:29:06 -04004590 do_renew_lease(clp, now);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004591 return 0;
4592}
4593
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004594static inline int nfs4_server_supports_acls(struct nfs_server *server)
4595{
Malahal Naineni7dd7d952014-01-23 08:54:55 -06004596 return server->caps & NFS_CAP_ACLS;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004597}
4598
Trond Myklebust21f498c2012-08-24 10:59:25 -04004599/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4600 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004601 * the stack.
4602 */
Trond Myklebust21f498c2012-08-24 10:59:25 -04004603#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004604
Neil Hormane9e3d722011-03-04 19:26:03 -05004605static int buf_to_pages_noslab(const void *buf, size_t buflen,
Andreas Gruenbacher8fbcf232015-11-03 18:25:34 +01004606 struct page **pages)
Neil Hormane9e3d722011-03-04 19:26:03 -05004607{
4608 struct page *newpage, **spages;
4609 int rc = 0;
4610 size_t len;
4611 spages = pages;
4612
4613 do {
Trond Myklebust21f498c2012-08-24 10:59:25 -04004614 len = min_t(size_t, PAGE_SIZE, buflen);
Neil Hormane9e3d722011-03-04 19:26:03 -05004615 newpage = alloc_page(GFP_KERNEL);
4616
4617 if (newpage == NULL)
4618 goto unwind;
4619 memcpy(page_address(newpage), buf, len);
4620 buf += len;
4621 buflen -= len;
4622 *pages++ = newpage;
4623 rc++;
4624 } while (buflen != 0);
4625
4626 return rc;
4627
4628unwind:
4629 for(; rc > 0; rc--)
4630 __free_page(spages[rc-1]);
4631 return -ENOMEM;
4632}
4633
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004634struct nfs4_cached_acl {
4635 int cached;
4636 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00004637 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004638};
4639
4640static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004641{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004642 struct nfs_inode *nfsi = NFS_I(inode);
4643
4644 spin_lock(&inode->i_lock);
4645 kfree(nfsi->nfs4_acl);
4646 nfsi->nfs4_acl = acl;
4647 spin_unlock(&inode->i_lock);
4648}
4649
4650static void nfs4_zap_acl_attr(struct inode *inode)
4651{
4652 nfs4_set_cached_acl(inode, NULL);
4653}
4654
4655static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4656{
4657 struct nfs_inode *nfsi = NFS_I(inode);
4658 struct nfs4_cached_acl *acl;
4659 int ret = -ENOENT;
4660
4661 spin_lock(&inode->i_lock);
4662 acl = nfsi->nfs4_acl;
4663 if (acl == NULL)
4664 goto out;
4665 if (buf == NULL) /* user is just asking for length */
4666 goto out_len;
4667 if (acl->cached == 0)
4668 goto out;
4669 ret = -ERANGE; /* see getxattr(2) man page */
4670 if (acl->len > buflen)
4671 goto out;
4672 memcpy(buf, acl->data, acl->len);
4673out_len:
4674 ret = acl->len;
4675out:
4676 spin_unlock(&inode->i_lock);
4677 return ret;
4678}
4679
Sachin Prabhu5794d212012-04-17 14:36:40 +01004680static 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 +00004681{
4682 struct nfs4_cached_acl *acl;
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004683 size_t buflen = sizeof(*acl) + acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004684
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004685 if (buflen <= PAGE_SIZE) {
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004686 acl = kmalloc(buflen, GFP_KERNEL);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004687 if (acl == NULL)
4688 goto out;
4689 acl->cached = 1;
Sachin Prabhu5794d212012-04-17 14:36:40 +01004690 _copy_from_pages(acl->data, pages, pgbase, acl_len);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004691 } else {
4692 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4693 if (acl == NULL)
4694 goto out;
4695 acl->cached = 0;
4696 }
4697 acl->len = acl_len;
4698out:
4699 nfs4_set_cached_acl(inode, acl);
4700}
4701
Andy Adamsonbf118a32011-12-07 11:55:27 -05004702/*
4703 * The getxattr API returns the required buffer length when called with a
4704 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4705 * the required buf. On a NULL buf, we send a page of data to the server
4706 * guessing that the ACL request can be serviced by a page. If so, we cache
4707 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4708 * the cache. If not so, we throw away the page, and cache the required
4709 * length. The next getxattr call will then produce another round trip to
4710 * the server, this time with the input buf of the required size.
4711 */
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004712static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004713{
Andy Adamsonbf118a32011-12-07 11:55:27 -05004714 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004715 struct nfs_getaclargs args = {
4716 .fh = NFS_FH(inode),
4717 .acl_pages = pages,
4718 .acl_len = buflen,
4719 };
Benny Halevy663c79b2009-04-01 09:21:59 -04004720 struct nfs_getaclres res = {
4721 .acl_len = buflen,
4722 };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4725 .rpc_argp = &args,
Benny Halevy663c79b2009-04-01 09:21:59 -04004726 .rpc_resp = &res,
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004727 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004728 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4729 int ret = -ENOMEM, i;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004730
Andy Adamsonbf118a32011-12-07 11:55:27 -05004731 /* As long as we're doing a round trip to the server anyway,
4732 * let's be prepared for a page of acl data. */
4733 if (npages == 0)
4734 npages = 1;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004735 if (npages > ARRAY_SIZE(pages))
4736 return -ERANGE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004737
Andy Adamsonbf118a32011-12-07 11:55:27 -05004738 for (i = 0; i < npages; i++) {
4739 pages[i] = alloc_page(GFP_KERNEL);
4740 if (!pages[i])
4741 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004742 }
Sachin Prabhu5a006892012-04-17 14:35:39 +01004743
4744 /* for decoding across pages */
4745 res.acl_scratch = alloc_page(GFP_KERNEL);
4746 if (!res.acl_scratch)
4747 goto out_free;
4748
Andy Adamsonbf118a32011-12-07 11:55:27 -05004749 args.acl_len = npages * PAGE_SIZE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004750
Peng Taode040be2012-01-10 22:42:47 +08004751 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
Andy Adamsonbf118a32011-12-07 11:55:27 -05004752 __func__, buf, buflen, npages, args.acl_len);
4753 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4754 &msg, &args.seq_args, &res.seq_res, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004755 if (ret)
4756 goto out_free;
Andy Adamsonbf118a32011-12-07 11:55:27 -05004757
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004758 /* Handle the case where the passed-in buffer is too short */
4759 if (res.acl_flags & NFS4_ACL_TRUNC) {
4760 /* Did the user only issue a request for the acl length? */
4761 if (buf == NULL)
4762 goto out_ok;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004763 ret = -ERANGE;
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004764 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004765 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004766 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004767 if (buf) {
4768 if (res.acl_len > buflen) {
4769 ret = -ERANGE;
4770 goto out_free;
4771 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004772 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004773 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004774out_ok:
4775 ret = res.acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004776out_free:
Andy Adamsonbf118a32011-12-07 11:55:27 -05004777 for (i = 0; i < npages; i++)
4778 if (pages[i])
4779 __free_page(pages[i]);
Trond Myklebust331818f2012-02-03 18:30:53 -05004780 if (res.acl_scratch)
4781 __free_page(res.acl_scratch);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004782 return ret;
4783}
4784
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004785static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4786{
4787 struct nfs4_exception exception = { };
4788 ssize_t ret;
4789 do {
4790 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
Trond Myklebustc1578b72013-08-12 16:58:42 -04004791 trace_nfs4_get_acl(inode, ret);
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004792 if (ret >= 0)
4793 break;
4794 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4795 } while (exception.retry);
4796 return ret;
4797}
4798
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004799static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4800{
4801 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004802 int ret;
4803
4804 if (!nfs4_server_supports_acls(server))
4805 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004806 ret = nfs_revalidate_inode(server, inode);
4807 if (ret < 0)
4808 return ret;
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004809 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4810 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004811 ret = nfs4_read_cached_acl(inode, buf, buflen);
4812 if (ret != -ENOENT)
Andy Adamsonbf118a32011-12-07 11:55:27 -05004813 /* -ENOENT is returned if there is no ACL or if there is an ACL
4814 * but no cached acl data, just the acl length */
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004815 return ret;
4816 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004817}
4818
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004819static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004820{
4821 struct nfs_server *server = NFS_SERVER(inode);
4822 struct page *pages[NFS4ACL_MAXPAGES];
4823 struct nfs_setaclargs arg = {
4824 .fh = NFS_FH(inode),
4825 .acl_pages = pages,
4826 .acl_len = buflen,
4827 };
Benny Halevy73c403a2009-04-01 09:22:01 -04004828 struct nfs_setaclres res;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004829 struct rpc_message msg = {
4830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4831 .rpc_argp = &arg,
Benny Halevy73c403a2009-04-01 09:22:01 -04004832 .rpc_resp = &res,
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004833 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004834 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
Neil Hormane9e3d722011-03-04 19:26:03 -05004835 int ret, i;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004836
4837 if (!nfs4_server_supports_acls(server))
4838 return -EOPNOTSUPP;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004839 if (npages > ARRAY_SIZE(pages))
4840 return -ERANGE;
Andreas Gruenbacher8fbcf232015-11-03 18:25:34 +01004841 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
Neil Hormane9e3d722011-03-04 19:26:03 -05004842 if (i < 0)
4843 return i;
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04004844 nfs4_inode_return_delegation(inode);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004845 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Neil Hormane9e3d722011-03-04 19:26:03 -05004846
4847 /*
4848 * Free each page after tx, so the only ref left is
4849 * held by the network stack
4850 */
4851 for (; i > 0; i--)
4852 put_page(pages[i-1]);
4853
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004854 /*
4855 * Acl update can result in inode attribute update.
4856 * so mark the attribute cache invalid.
4857 */
4858 spin_lock(&inode->i_lock);
4859 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4860 spin_unlock(&inode->i_lock);
Trond Myklebustf41f7412008-06-11 17:39:04 -04004861 nfs_access_zap_cache(inode);
4862 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004863 return ret;
4864}
4865
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004866static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4867{
4868 struct nfs4_exception exception = { };
4869 int err;
4870 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004871 err = __nfs4_proc_set_acl(inode, buf, buflen);
4872 trace_nfs4_set_acl(inode, err);
4873 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004874 &exception);
4875 } while (exception.retry);
4876 return err;
4877}
4878
David Quigleyaa9c2662013-05-22 12:50:44 -04004879#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4880static int _nfs4_get_security_label(struct inode *inode, void *buf,
4881 size_t buflen)
4882{
4883 struct nfs_server *server = NFS_SERVER(inode);
4884 struct nfs_fattr fattr;
4885 struct nfs4_label label = {0, 0, buflen, buf};
4886
4887 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004888 struct nfs4_getattr_arg arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004889 .fh = NFS_FH(inode),
4890 .bitmask = bitmask,
4891 };
4892 struct nfs4_getattr_res res = {
4893 .fattr = &fattr,
4894 .label = &label,
4895 .server = server,
4896 };
4897 struct rpc_message msg = {
4898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004899 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004900 .rpc_resp = &res,
4901 };
4902 int ret;
4903
4904 nfs_fattr_init(&fattr);
4905
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004906 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
David Quigleyaa9c2662013-05-22 12:50:44 -04004907 if (ret)
4908 return ret;
4909 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4910 return -ENOENT;
4911 if (buflen < label.len)
4912 return -ERANGE;
4913 return 0;
4914}
4915
4916static int nfs4_get_security_label(struct inode *inode, void *buf,
4917 size_t buflen)
4918{
4919 struct nfs4_exception exception = { };
4920 int err;
4921
4922 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4923 return -EOPNOTSUPP;
4924
4925 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004926 err = _nfs4_get_security_label(inode, buf, buflen);
4927 trace_nfs4_get_security_label(inode, err);
4928 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004929 &exception);
4930 } while (exception.retry);
4931 return err;
4932}
4933
4934static int _nfs4_do_set_security_label(struct inode *inode,
4935 struct nfs4_label *ilabel,
4936 struct nfs_fattr *fattr,
4937 struct nfs4_label *olabel)
4938{
4939
4940 struct iattr sattr = {0};
4941 struct nfs_server *server = NFS_SERVER(inode);
4942 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Jeff Layton12207f62013-11-01 10:49:32 -04004943 struct nfs_setattrargs arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004944 .fh = NFS_FH(inode),
4945 .iap = &sattr,
4946 .server = server,
4947 .bitmask = bitmask,
4948 .label = ilabel,
4949 };
4950 struct nfs_setattrres res = {
4951 .fattr = fattr,
4952 .label = olabel,
4953 .server = server,
4954 };
4955 struct rpc_message msg = {
4956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
Jeff Layton12207f62013-11-01 10:49:32 -04004957 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004958 .rpc_resp = &res,
4959 };
4960 int status;
4961
Jeff Layton12207f62013-11-01 10:49:32 -04004962 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
David Quigleyaa9c2662013-05-22 12:50:44 -04004963
Jeff Layton12207f62013-11-01 10:49:32 -04004964 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04004965 if (status)
4966 dprintk("%s failed: %d\n", __func__, status);
4967
4968 return status;
4969}
4970
4971static int nfs4_do_set_security_label(struct inode *inode,
4972 struct nfs4_label *ilabel,
4973 struct nfs_fattr *fattr,
4974 struct nfs4_label *olabel)
4975{
4976 struct nfs4_exception exception = { };
4977 int err;
4978
4979 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004980 err = _nfs4_do_set_security_label(inode, ilabel,
4981 fattr, olabel);
4982 trace_nfs4_set_security_label(inode, err);
4983 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004984 &exception);
4985 } while (exception.retry);
4986 return err;
4987}
4988
4989static int
4990nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4991{
4992 struct nfs4_label ilabel, *olabel = NULL;
4993 struct nfs_fattr fattr;
4994 struct rpc_cred *cred;
David Howells2b0143b2015-03-17 22:25:59 +00004995 struct inode *inode = d_inode(dentry);
David Quigleyaa9c2662013-05-22 12:50:44 -04004996 int status;
4997
4998 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4999 return -EOPNOTSUPP;
5000
5001 nfs_fattr_init(&fattr);
5002
5003 ilabel.pi = 0;
5004 ilabel.lfs = 0;
5005 ilabel.label = (char *)buf;
5006 ilabel.len = buflen;
5007
5008 cred = rpc_lookup_cred();
5009 if (IS_ERR(cred))
5010 return PTR_ERR(cred);
5011
5012 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5013 if (IS_ERR(olabel)) {
5014 status = -PTR_ERR(olabel);
5015 goto out;
5016 }
5017
5018 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5019 if (status == 0)
5020 nfs_setsecurity(inode, &fattr, olabel);
5021
5022 nfs4_label_free(olabel);
5023out:
5024 put_rpccred(cred);
5025 return status;
5026}
5027#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5028
5029
Chuck Leverf0920752012-05-21 22:45:41 -04005030static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5031 nfs4_verifier *bootverf)
Chuck Levercd937102012-03-02 17:14:31 -05005032{
5033 __be32 verf[2];
5034
Chuck Lever2c820d92012-05-21 22:45:33 -04005035 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5036 /* An impossible timestamp guarantees this value
5037 * will never match a generated boot time. */
5038 verf[0] = 0;
Trond Myklebust17f26b12013-08-21 15:48:42 -04005039 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
Chuck Lever2c820d92012-05-21 22:45:33 -04005040 } else {
Chuck Leverf0920752012-05-21 22:45:41 -04005041 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Trond Myklebust17f26b12013-08-21 15:48:42 -04005042 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5043 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
Chuck Lever2c820d92012-05-21 22:45:33 -04005044 }
Chuck Levercd937102012-03-02 17:14:31 -05005045 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5046}
5047
Jeff Laytona3192682015-06-09 19:43:59 -04005048static int
5049nfs4_init_nonuniform_client_string(struct nfs_client *clp)
Chuck Levere984a552012-09-14 17:24:21 -04005050{
Jeff Laytona3192682015-06-09 19:43:59 -04005051 int result;
5052 size_t len;
5053 char *str;
Chuck Levere984a552012-09-14 17:24:21 -04005054
Trond Myklebustceb3a162015-01-03 15:16:04 -05005055 if (clp->cl_owner_id != NULL)
Jeff Laytona3192682015-06-09 19:43:59 -04005056 return 0;
Kinglong Mee4a3e5772015-08-31 10:53:43 +08005057
Jeff Laytona3192682015-06-09 19:43:59 -04005058 rcu_read_lock();
Kinglong Mee4a703162015-08-31 10:53:33 +08005059 len = 14 + strlen(clp->cl_ipaddr) + 1 +
Jeff Laytona3192682015-06-09 19:43:59 -04005060 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5061 1 +
5062 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5063 1;
5064 rcu_read_unlock();
5065
5066 if (len > NFS4_OPAQUE_LIMIT + 1)
5067 return -EINVAL;
5068
5069 /*
5070 * Since this string is allocated at mount time, and held until the
5071 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5072 * about a memory-reclaim deadlock.
5073 */
5074 str = kmalloc(len, GFP_KERNEL);
5075 if (!str)
5076 return -ENOMEM;
Trond Myklebustceb3a162015-01-03 15:16:04 -05005077
Chuck Levere984a552012-09-14 17:24:21 -04005078 rcu_read_lock();
Jeff Laytona3192682015-06-09 19:43:59 -04005079 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5080 clp->cl_ipaddr,
5081 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5082 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
Chuck Levere984a552012-09-14 17:24:21 -04005083 rcu_read_unlock();
Jeff Laytona3192682015-06-09 19:43:59 -04005084
Jeff Laytona3192682015-06-09 19:43:59 -04005085 clp->cl_owner_id = str;
5086 return 0;
Chuck Levere984a552012-09-14 17:24:21 -04005087}
5088
Jeff Layton873e3852015-06-09 19:44:00 -04005089static int
5090nfs4_init_uniquifier_client_string(struct nfs_client *clp)
Chuck Levere984a552012-09-14 17:24:21 -04005091{
Jeff Layton873e3852015-06-09 19:44:00 -04005092 int result;
5093 size_t len;
5094 char *str;
5095
5096 len = 10 + 10 + 1 + 10 + 1 +
5097 strlen(nfs4_client_id_uniquifier) + 1 +
5098 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5099
5100 if (len > NFS4_OPAQUE_LIMIT + 1)
5101 return -EINVAL;
5102
5103 /*
5104 * Since this string is allocated at mount time, and held until the
5105 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5106 * about a memory-reclaim deadlock.
5107 */
5108 str = kmalloc(len, GFP_KERNEL);
5109 if (!str)
5110 return -ENOMEM;
5111
5112 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5113 clp->rpc_ops->version, clp->cl_minorversion,
5114 nfs4_client_id_uniquifier,
5115 clp->cl_rpcclient->cl_nodename);
Jeff Layton873e3852015-06-09 19:44:00 -04005116 clp->cl_owner_id = str;
5117 return 0;
5118}
5119
5120static int
5121nfs4_init_uniform_client_string(struct nfs_client *clp)
5122{
5123 int result;
5124 size_t len;
5125 char *str;
Trond Myklebustceb3a162015-01-03 15:16:04 -05005126
5127 if (clp->cl_owner_id != NULL)
Jeff Layton873e3852015-06-09 19:44:00 -04005128 return 0;
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04005129
5130 if (nfs4_client_id_uniquifier[0] != '\0')
Jeff Layton873e3852015-06-09 19:44:00 -04005131 return nfs4_init_uniquifier_client_string(clp);
5132
5133 len = 10 + 10 + 1 + 10 + 1 +
5134 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5135
5136 if (len > NFS4_OPAQUE_LIMIT + 1)
5137 return -EINVAL;
5138
5139 /*
5140 * Since this string is allocated at mount time, and held until the
5141 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5142 * about a memory-reclaim deadlock.
5143 */
5144 str = kmalloc(len, GFP_KERNEL);
5145 if (!str)
5146 return -ENOMEM;
5147
5148 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5149 clp->rpc_ops->version, clp->cl_minorversion,
5150 clp->cl_rpcclient->cl_nodename);
Jeff Layton873e3852015-06-09 19:44:00 -04005151 clp->cl_owner_id = str;
5152 return 0;
Chuck Levere984a552012-09-14 17:24:21 -04005153}
5154
Chuck Lever706cb8d2014-03-12 12:51:47 -04005155/*
5156 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5157 * services. Advertise one based on the address family of the
5158 * clientaddr.
5159 */
5160static unsigned int
5161nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5162{
5163 if (strchr(clp->cl_ipaddr, ':') != NULL)
5164 return scnprintf(buf, len, "tcp6");
5165 else
5166 return scnprintf(buf, len, "tcp");
5167}
5168
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005169static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5170{
5171 struct nfs4_setclientid *sc = calldata;
5172
5173 if (task->tk_status == 0)
5174 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5175}
5176
5177static const struct rpc_call_ops nfs4_setclientid_ops = {
5178 .rpc_call_done = nfs4_setclientid_done,
5179};
5180
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005181/**
5182 * nfs4_proc_setclientid - Negotiate client ID
5183 * @clp: state data structure
5184 * @program: RPC program for NFSv4 callback service
5185 * @port: IP port number for NFS4 callback service
5186 * @cred: RPC credential to use for this call
5187 * @res: where to place the result
5188 *
5189 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5190 */
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005191int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5192 unsigned short port, struct rpc_cred *cred,
5193 struct nfs4_setclientid_res *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005194{
5195 nfs4_verifier sc_verifier;
5196 struct nfs4_setclientid setclientid = {
5197 .sc_verifier = &sc_verifier,
5198 .sc_prog = program,
Jeff Layton3a6bb732015-06-09 19:43:57 -04005199 .sc_clnt = clp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005200 };
5201 struct rpc_message msg = {
5202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5203 .rpc_argp = &setclientid,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005204 .rpc_resp = res,
Trond Myklebust286d7d62006-01-03 09:55:26 +01005205 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005206 };
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005207 struct rpc_task *task;
5208 struct rpc_task_setup task_setup_data = {
5209 .rpc_client = clp->cl_rpcclient,
5210 .rpc_message = &msg,
5211 .callback_ops = &nfs4_setclientid_ops,
5212 .callback_data = &setclientid,
5213 .flags = RPC_TASK_TIMEOUT,
5214 };
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005215 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005216
Chuck Leverde734832012-07-11 16:30:50 -04005217 /* nfs_client_id4 */
Chuck Leverf0920752012-05-21 22:45:41 -04005218 nfs4_init_boot_verifier(clp, &sc_verifier);
Jeff Layton873e3852015-06-09 19:44:00 -04005219
5220 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5221 status = nfs4_init_uniform_client_string(clp);
5222 else
Jeff Laytona3192682015-06-09 19:43:59 -04005223 status = nfs4_init_nonuniform_client_string(clp);
Jeff Layton873e3852015-06-09 19:44:00 -04005224
5225 if (status)
5226 goto out;
Jeff Layton3a6bb732015-06-09 19:43:57 -04005227
Chuck Leverde734832012-07-11 16:30:50 -04005228 /* cb_client4 */
Chuck Lever706cb8d2014-03-12 12:51:47 -04005229 setclientid.sc_netid_len =
5230 nfs4_init_callback_netid(clp,
5231 setclientid.sc_netid,
5232 sizeof(setclientid.sc_netid));
Chuck Leverde734832012-07-11 16:30:50 -04005233 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05005234 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07005235 clp->cl_ipaddr, port >> 8, port & 255);
5236
Jeff Layton3a6bb732015-06-09 19:43:57 -04005237 dprintk("NFS call setclientid auth=%s, '%s'\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005238 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Jeff Layton3a6bb732015-06-09 19:43:57 -04005239 clp->cl_owner_id);
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005240 task = rpc_run_task(&task_setup_data);
5241 if (IS_ERR(task)) {
5242 status = PTR_ERR(task);
5243 goto out;
5244 }
5245 status = task->tk_status;
5246 if (setclientid.sc_cred) {
5247 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5248 put_rpccred(setclientid.sc_cred);
5249 }
5250 rpc_put_task(task);
5251out:
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005252 trace_nfs4_setclientid(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005253 dprintk("NFS reply setclientid: %d\n", status);
5254 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005255}
5256
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005257/**
5258 * nfs4_proc_setclientid_confirm - Confirm client ID
5259 * @clp: state data structure
5260 * @res: result of a previous SETCLIENTID
5261 * @cred: RPC credential to use for this call
5262 *
5263 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5264 */
Trond Myklebustfd954ae2011-04-24 14:28:18 -04005265int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005266 struct nfs4_setclientid_res *arg,
5267 struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005268{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005269 struct rpc_message msg = {
5270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005271 .rpc_argp = arg,
Trond Myklebust286d7d62006-01-03 09:55:26 +01005272 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005273 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005274 int status;
5275
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005276 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5277 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5278 clp->cl_clientid);
Trond Myklebust1bd714f2011-04-24 14:29:33 -04005279 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005280 trace_nfs4_setclientid_confirm(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005281 dprintk("NFS reply setclientid_confirm: %d\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005282 return status;
5283}
5284
Trond Myklebustfe650402006-01-03 09:55:18 +01005285struct nfs4_delegreturndata {
5286 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005287 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01005288 struct nfs_fh fh;
5289 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005290 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005291 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01005292 int rpc_status;
Peng Tao039b7562014-07-03 13:05:02 +08005293 struct inode *inode;
5294 bool roc;
5295 u32 roc_barrier;
Trond Myklebustfe650402006-01-03 09:55:18 +01005296};
5297
Trond Myklebustfe650402006-01-03 09:55:18 +01005298static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5299{
5300 struct nfs4_delegreturndata *data = calldata;
Andy Adamson938e1012009-04-01 09:22:28 -04005301
Trond Myklebust14516c32010-07-31 14:29:06 -04005302 if (!nfs4_sequence_done(task, &data->res.seq_res))
5303 return;
Andy Adamson938e1012009-04-01 09:22:28 -04005304
Trond Myklebustca8acf82013-08-13 10:36:56 -04005305 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005306 switch (task->tk_status) {
Ricardo Labiaga79708862009-12-07 09:23:21 -05005307 case 0:
Trond Myklebustfa178f22006-01-03 09:55:38 +01005308 renew_lease(data->res.server, data->timestamp);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005309 case -NFS4ERR_ADMIN_REVOKED:
5310 case -NFS4ERR_DELEG_REVOKED:
5311 case -NFS4ERR_BAD_STATEID:
5312 case -NFS4ERR_OLD_STATEID:
5313 case -NFS4ERR_STALE_STATEID:
5314 case -NFS4ERR_EXPIRED:
5315 task->tk_status = 0;
Peng Tao039b7562014-07-03 13:05:02 +08005316 if (data->roc)
5317 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005318 break;
Ricardo Labiaga79708862009-12-07 09:23:21 -05005319 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10005320 if (nfs4_async_handle_error(task, data->res.server,
5321 NULL, NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005322 rpc_restart_call_prepare(task);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005323 return;
5324 }
5325 }
5326 data->rpc_status = task->tk_status;
Trond Myklebustfe650402006-01-03 09:55:18 +01005327}
5328
5329static void nfs4_delegreturn_release(void *calldata)
5330{
Peng Tao039b7562014-07-03 13:05:02 +08005331 struct nfs4_delegreturndata *data = calldata;
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005332 struct inode *inode = data->inode;
Peng Tao039b7562014-07-03 13:05:02 +08005333
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005334 if (inode) {
5335 if (data->roc)
5336 pnfs_roc_release(inode);
5337 nfs_iput_and_deactive(inode);
5338 }
Trond Myklebustfe650402006-01-03 09:55:18 +01005339 kfree(calldata);
5340}
5341
Andy Adamson938e1012009-04-01 09:22:28 -04005342static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5343{
5344 struct nfs4_delegreturndata *d_data;
5345
5346 d_data = (struct nfs4_delegreturndata *)data;
5347
Peng Tao500d7012015-09-22 11:35:22 +08005348 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5349 return;
5350
Trond Myklebust4ff376f2015-08-18 23:23:21 -05005351 if (d_data->roc)
5352 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
Peng Tao039b7562014-07-03 13:05:02 +08005353
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005354 nfs4_setup_sequence(d_data->res.server,
5355 &d_data->args.seq_args,
5356 &d_data->res.seq_res,
5357 task);
Andy Adamson938e1012009-04-01 09:22:28 -04005358}
Andy Adamson938e1012009-04-01 09:22:28 -04005359
Jesper Juhlc8d149f2006-03-20 13:44:07 -05005360static const struct rpc_call_ops nfs4_delegreturn_ops = {
Andy Adamson938e1012009-04-01 09:22:28 -04005361 .rpc_call_prepare = nfs4_delegreturn_prepare,
Trond Myklebustfe650402006-01-03 09:55:18 +01005362 .rpc_call_done = nfs4_delegreturn_done,
5363 .rpc_release = nfs4_delegreturn_release,
5364};
5365
Trond Myklebuste6f81072008-01-24 18:14:34 -05005366static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01005367{
5368 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005369 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005370 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005371 struct rpc_message msg = {
5372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5373 .rpc_cred = cred,
5374 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005375 struct rpc_task_setup task_setup_data = {
5376 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04005377 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005378 .callback_ops = &nfs4_delegreturn_ops,
5379 .flags = RPC_TASK_ASYNC,
5380 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05005381 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01005382
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005383 data = kzalloc(sizeof(*data), GFP_NOFS);
Trond Myklebustfe650402006-01-03 09:55:18 +01005384 if (data == NULL)
5385 return -ENOMEM;
Chuck Levera9c92d62013-08-09 12:48:18 -04005386 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Trond Myklebustfe650402006-01-03 09:55:18 +01005387 data->args.fhandle = &data->fh;
5388 data->args.stateid = &data->stateid;
Trond Myklebust9e907fe2012-04-27 13:48:17 -04005389 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01005390 nfs_copy_fh(&data->fh, NFS_FH(inode));
Trond Myklebustf597c532012-03-04 18:13:56 -05005391 nfs4_stateid_copy(&data->stateid, stateid);
Trond Myklebustfa178f22006-01-03 09:55:38 +01005392 data->res.fattr = &data->fattr;
5393 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005394 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005395 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01005396 data->rpc_status = 0;
Trond Myklebustea7c38f2015-02-05 15:13:24 -05005397 data->inode = nfs_igrab_and_active(inode);
5398 if (data->inode)
5399 data->roc = nfs4_roc(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005400
Trond Myklebustc970aa82007-07-14 15:39:59 -04005401 task_setup_data.callback_data = data;
Trond Myklebust1174dd12010-12-21 10:52:24 -05005402 msg.rpc_argp = &data->args;
5403 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005404 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005405 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01005406 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005407 if (!issync)
5408 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01005409 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005410 if (status != 0)
5411 goto out;
5412 status = data->rpc_status;
Trond Myklebuste144cbc2012-04-28 16:05:03 -04005413 if (status == 0)
5414 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5415 else
5416 nfs_refresh_inode(inode, &data->fattr);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005417out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005418 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01005419 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005420}
5421
Trond Myklebuste6f81072008-01-24 18:14:34 -05005422int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005423{
5424 struct nfs_server *server = NFS_SERVER(inode);
5425 struct nfs4_exception exception = { };
5426 int err;
5427 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05005428 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Trond Myklebustca8acf82013-08-13 10:36:56 -04005429 trace_nfs4_delegreturn(inode, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005430 switch (err) {
5431 case -NFS4ERR_STALE_STATEID:
5432 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005433 case 0:
5434 return 0;
5435 }
5436 err = nfs4_handle_exception(server, err, &exception);
5437 } while (exception.retry);
5438 return err;
5439}
5440
5441#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5442#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5443
5444/*
5445 * sleep, with exponential backoff, and retry the LOCK operation.
5446 */
5447static unsigned long
5448nfs4_set_lock_task_retry(unsigned long timeout)
5449{
Colin Cross416ad3c2013-05-06 23:50:06 +00005450 freezable_schedule_timeout_killable_unsafe(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005451 timeout <<= 1;
5452 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5453 return NFS4_LOCK_MAXTIMEOUT;
5454 return timeout;
5455}
5456
Linus Torvalds1da177e2005-04-16 15:20:36 -07005457static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5458{
5459 struct inode *inode = state->inode;
5460 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04005461 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005462 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005463 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005464 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005465 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005466 struct nfs_lockt_res res = {
5467 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005468 };
5469 struct rpc_message msg = {
5470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5471 .rpc_argp = &arg,
5472 .rpc_resp = &res,
5473 .rpc_cred = state->owner->so_cred,
5474 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005475 struct nfs4_lock_state *lsp;
5476 int status;
5477
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005478 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005479 status = nfs4_set_lock_state(state, request);
5480 if (status != 0)
5481 goto out;
5482 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005483 arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005484 arg.lock_owner.s_dev = server->s_dev;
Bryan Schumaker7c513052011-03-24 17:12:24 +00005485 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005486 switch (status) {
5487 case 0:
5488 request->fl_type = F_UNLCK;
5489 break;
5490 case -NFS4ERR_DENIED:
5491 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005492 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05005493 request->fl_ops->fl_release_private(request);
Trond Myklebusta6f951d2013-10-01 14:24:58 -04005494 request->fl_ops = NULL;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005495out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005496 return status;
5497}
5498
5499static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5500{
5501 struct nfs4_exception exception = { };
5502 int err;
5503
5504 do {
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005505 err = _nfs4_proc_getlk(state, cmd, request);
5506 trace_nfs4_get_lock(request, state, cmd, err);
5507 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005508 &exception);
5509 } while (exception.retry);
5510 return err;
5511}
5512
Jeff Layton83bfff22015-07-11 06:43:03 -04005513static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005514{
Benjamin Coddington4f656362015-10-22 13:38:14 -04005515 return locks_lock_inode_wait(inode, fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005516}
5517
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005518struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005519 struct nfs_locku_args arg;
5520 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005521 struct nfs4_lock_state *lsp;
5522 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005523 struct file_lock fl;
Trond Myklebust516285eb2015-09-20 16:15:24 -04005524 struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005525 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005526};
5527
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005528static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5529 struct nfs_open_context *ctx,
5530 struct nfs4_lock_state *lsp,
5531 struct nfs_seqid *seqid)
5532{
5533 struct nfs4_unlockdata *p;
5534 struct inode *inode = lsp->ls_state->inode;
5535
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005536 p = kzalloc(sizeof(*p), GFP_NOFS);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005537 if (p == NULL)
5538 return NULL;
5539 p->arg.fh = NFS_FH(inode);
5540 p->arg.fl = &p->fl;
5541 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005542 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005543 p->lsp = lsp;
5544 atomic_inc(&lsp->ls_count);
5545 /* Ensure we don't close file until we're done freeing locks! */
5546 p->ctx = get_nfs_open_context(ctx);
5547 memcpy(&p->fl, fl, sizeof(p->fl));
5548 p->server = NFS_SERVER(inode);
5549 return p;
5550}
5551
Trond Myklebust06f814a2006-01-03 09:55:07 +01005552static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005553{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005554 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005555 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005556 nfs4_put_lock_state(calldata->lsp);
5557 put_nfs_open_context(calldata->ctx);
5558 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005559}
5560
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005561static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005562{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005563 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005564
Trond Myklebust14516c32010-07-31 14:29:06 -04005565 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5566 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005567 switch (task->tk_status) {
5568 case 0:
Trond Myklebust26e976a2006-01-03 09:55:21 +01005569 renew_lease(calldata->server, calldata->timestamp);
Jeff Layton83bfff22015-07-11 06:43:03 -04005570 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005571 if (nfs4_update_lock_stateid(calldata->lsp,
5572 &calldata->res.stateid))
5573 break;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005574 case -NFS4ERR_BAD_STATEID:
5575 case -NFS4ERR_OLD_STATEID:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005576 case -NFS4ERR_STALE_STATEID:
5577 case -NFS4ERR_EXPIRED:
Trond Myklebust425c1d42015-01-24 14:57:53 -05005578 if (!nfs4_stateid_match(&calldata->arg.stateid,
5579 &calldata->lsp->ls_stateid))
5580 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005581 break;
5582 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10005583 if (nfs4_async_handle_error(task, calldata->server,
5584 NULL, NULL) == -EAGAIN)
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005585 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005586 }
Trond Myklebust2b1bc302012-10-29 18:53:23 -04005587 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005588}
5589
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005590static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005591{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005592 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005593
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005594 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005595 goto out_wait;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005596 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005597 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005598 /* Note: exit _without_ running nfs4_locku_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005599 goto out_no_action;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005600 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005601 calldata->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005602 if (nfs4_setup_sequence(calldata->server,
Andy Adamsona8936932009-04-01 09:22:23 -04005603 &calldata->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005604 &calldata->res.seq_res,
5605 task) != 0)
5606 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005607 return;
5608out_no_action:
5609 task->tk_action = NULL;
5610out_wait:
5611 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005612}
5613
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005614static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005615 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005616 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01005617 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005618};
5619
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005620static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5621 struct nfs_open_context *ctx,
5622 struct nfs4_lock_state *lsp,
5623 struct nfs_seqid *seqid)
5624{
5625 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005626 struct rpc_message msg = {
5627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5628 .rpc_cred = ctx->cred,
5629 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005630 struct rpc_task_setup task_setup_data = {
5631 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005632 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005633 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005634 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005635 .flags = RPC_TASK_ASYNC,
5636 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005637
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04005638 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5639 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5640
Frank Filz137d6ac2007-07-09 15:32:29 -07005641 /* Ensure this is an unlock - when canceling a lock, the
5642 * canceled lock is passed in, and it won't be an unlock.
5643 */
5644 fl->fl_type = F_UNLCK;
5645
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005646 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5647 if (data == NULL) {
5648 nfs_free_seqid(seqid);
5649 return ERR_PTR(-ENOMEM);
5650 }
5651
Chuck Levera9c92d62013-08-09 12:48:18 -04005652 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005653 msg.rpc_argp = &data->arg;
5654 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005655 task_setup_data.callback_data = data;
5656 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005657}
5658
Linus Torvalds1da177e2005-04-16 15:20:36 -07005659static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5660{
Trond Myklebust65b62a22013-02-07 10:54:07 -05005661 struct inode *inode = state->inode;
5662 struct nfs4_state_owner *sp = state->owner;
5663 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005664 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005665 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01005666 struct rpc_task *task;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005667 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005668 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005669 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005670
Trond Myklebust9b073572006-06-29 16:38:34 -04005671 status = nfs4_set_lock_state(state, request);
5672 /* Unlock _before_ we do the RPC call */
5673 request->fl_flags |= FL_EXISTS;
Trond Myklebust65b62a22013-02-07 10:54:07 -05005674 /* Exclude nfs_delegation_claim_locks() */
5675 mutex_lock(&sp->so_delegreturn_mutex);
5676 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005677 down_read(&nfsi->rwsem);
Jeff Layton83bfff22015-07-11 06:43:03 -04005678 if (do_vfs_lock(inode, request) == -ENOENT) {
Trond Myklebust19e03c52008-12-23 15:21:44 -05005679 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005680 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005681 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005682 }
5683 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005684 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005685 if (status != 0)
5686 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005687 /* Is this a delegated lock? */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005688 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebustc5a2a152013-04-30 12:43:42 -04005689 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5690 goto out;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005691 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5692 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
Trond Myklebust9b073572006-06-29 16:38:34 -04005693 status = -ENOMEM;
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005694 if (IS_ERR(seqid))
Trond Myklebust9b073572006-06-29 16:38:34 -04005695 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005696 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005697 status = PTR_ERR(task);
5698 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04005699 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005700 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005701 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04005702out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005703 request->fl_flags = fl_flags;
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005704 trace_nfs4_unlock(request, state, F_SETLK, status);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005705 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005706}
5707
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005708struct nfs4_lockdata {
5709 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005710 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005711 struct nfs4_lock_state *lsp;
5712 struct nfs_open_context *ctx;
5713 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005714 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005715 int rpc_status;
5716 int cancelled;
Andy Adamson66179ef2009-04-01 09:22:22 -04005717 struct nfs_server *server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005718};
5719
5720static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005721 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5722 gfp_t gfp_mask)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005723{
5724 struct nfs4_lockdata *p;
5725 struct inode *inode = lsp->ls_state->inode;
5726 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustb4019c02015-01-24 14:19:19 -05005727 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005728
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005729 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005730 if (p == NULL)
5731 return NULL;
5732
5733 p->arg.fh = NFS_FH(inode);
5734 p->arg.fl = &p->fl;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005735 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005736 if (IS_ERR(p->arg.open_seqid))
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005737 goto out_free;
Trond Myklebustb4019c02015-01-24 14:19:19 -05005738 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5739 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05005740 if (IS_ERR(p->arg.lock_seqid))
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005741 goto out_free_seqid;
David Howells7539bba2006-08-22 20:06:09 -04005742 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005743 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005744 p->arg.lock_owner.s_dev = server->s_dev;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005745 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005746 p->lsp = lsp;
Andy Adamson66179ef2009-04-01 09:22:22 -04005747 p->server = server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005748 atomic_inc(&lsp->ls_count);
5749 p->ctx = get_nfs_open_context(ctx);
Jeff Laytonfeaff8e2015-05-12 15:48:10 -04005750 get_file(fl->fl_file);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005751 memcpy(&p->fl, fl, sizeof(p->fl));
5752 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005753out_free_seqid:
5754 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005755out_free:
5756 kfree(p);
5757 return NULL;
5758}
5759
5760static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5761{
5762 struct nfs4_lockdata *data = calldata;
5763 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005764
Harvey Harrison3110ff82008-05-02 13:42:44 -07005765 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005766 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005767 goto out_wait;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005768 /* Do we need to do an open_to_lock_owner? */
Trond Myklebust6b447532015-01-24 18:38:15 -05005769 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005770 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005771 goto out_release_lock_seqid;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005772 }
Trond Myklebust425c1d42015-01-24 14:57:53 -05005773 nfs4_stateid_copy(&data->arg.open_stateid,
5774 &state->open_stateid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005775 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005776 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005777 } else {
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005778 data->arg.new_lock_owner = 0;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005779 nfs4_stateid_copy(&data->arg.lock_stateid,
5780 &data->lsp->ls_stateid);
5781 }
Trond Myklebust5d422302013-03-14 16:57:48 -04005782 if (!nfs4_valid_open_stateid(state)) {
5783 data->rpc_status = -EBADF;
5784 task->tk_action = NULL;
5785 goto out_release_open_seqid;
5786 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005787 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005788 if (nfs4_setup_sequence(data->server,
5789 &data->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005790 &data->res.seq_res,
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005791 task) == 0)
Andy Adamson66179ef2009-04-01 09:22:22 -04005792 return;
Trond Myklebust5d422302013-03-14 16:57:48 -04005793out_release_open_seqid:
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005794 nfs_release_seqid(data->arg.open_seqid);
5795out_release_lock_seqid:
5796 nfs_release_seqid(data->arg.lock_seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005797out_wait:
5798 nfs4_sequence_done(task, &data->res.seq_res);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005799 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08005800}
5801
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005802static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5803{
5804 struct nfs4_lockdata *data = calldata;
Trond Myklebust39071e62015-01-24 15:07:56 -05005805 struct nfs4_lock_state *lsp = data->lsp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005806
Harvey Harrison3110ff82008-05-02 13:42:44 -07005807 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005808
Trond Myklebust14516c32010-07-31 14:29:06 -04005809 if (!nfs4_sequence_done(task, &data->res.seq_res))
5810 return;
Andy Adamson66179ef2009-04-01 09:22:22 -04005811
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005812 data->rpc_status = task->tk_status;
Trond Myklebust425c1d42015-01-24 14:57:53 -05005813 switch (task->tk_status) {
5814 case 0:
David Howells2b0143b2015-03-17 22:25:59 +00005815 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
Trond Myklebust39071e62015-01-24 15:07:56 -05005816 data->timestamp);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005817 if (data->arg.new_lock) {
5818 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
Jeff Layton83bfff22015-07-11 06:43:03 -04005819 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
Trond Myklebustc69899a2015-01-24 16:03:52 -05005820 rpc_restart_call_prepare(task);
5821 break;
5822 }
5823 }
Trond Myklebust39071e62015-01-24 15:07:56 -05005824 if (data->arg.new_lock_owner != 0) {
5825 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5826 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5827 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5828 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5829 rpc_restart_call_prepare(task);
Trond Myklebust425c1d42015-01-24 14:57:53 -05005830 break;
5831 case -NFS4ERR_BAD_STATEID:
5832 case -NFS4ERR_OLD_STATEID:
5833 case -NFS4ERR_STALE_STATEID:
5834 case -NFS4ERR_EXPIRED:
5835 if (data->arg.new_lock_owner != 0) {
5836 if (!nfs4_stateid_match(&data->arg.open_stateid,
5837 &lsp->ls_state->open_stateid))
5838 rpc_restart_call_prepare(task);
5839 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5840 &lsp->ls_stateid))
5841 rpc_restart_call_prepare(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005842 }
Harvey Harrison3110ff82008-05-02 13:42:44 -07005843 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005844}
5845
5846static void nfs4_lock_release(void *calldata)
5847{
5848 struct nfs4_lockdata *data = calldata;
5849
Harvey Harrison3110ff82008-05-02 13:42:44 -07005850 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005851 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005852 if (data->cancelled != 0) {
5853 struct rpc_task *task;
5854 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5855 data->arg.lock_seqid);
5856 if (!IS_ERR(task))
Trond Myklebustbf294b42011-02-21 11:05:41 -08005857 rpc_put_task_async(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005858 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005859 } else
5860 nfs_free_seqid(data->arg.lock_seqid);
5861 nfs4_put_lock_state(data->lsp);
5862 put_nfs_open_context(data->ctx);
Jeff Laytonfeaff8e2015-05-12 15:48:10 -04005863 fput(data->fl.fl_file);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005864 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005865 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005866}
5867
5868static const struct rpc_call_ops nfs4_lock_ops = {
5869 .rpc_call_prepare = nfs4_lock_prepare,
5870 .rpc_call_done = nfs4_lock_done,
5871 .rpc_release = nfs4_lock_release,
5872};
5873
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005874static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5875{
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005876 switch (error) {
5877 case -NFS4ERR_ADMIN_REVOKED:
5878 case -NFS4ERR_BAD_STATEID:
Trond Myklebustecac7992011-03-09 16:00:56 -05005879 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005880 if (new_lock_owner != 0 ||
Trond Myklebust795a88c2012-09-10 13:26:49 -04005881 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
Trond Myklebustecac7992011-03-09 16:00:56 -05005882 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005883 break;
5884 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005885 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebustecac7992011-03-09 16:00:56 -05005886 case -NFS4ERR_EXPIRED:
5887 nfs4_schedule_lease_recovery(server->nfs_client);
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005888 };
5889}
5890
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005891static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005892{
5893 struct nfs4_lockdata *data;
5894 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5897 .rpc_cred = state->owner->so_cred,
5898 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005899 struct rpc_task_setup task_setup_data = {
5900 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005901 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005902 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005903 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005904 .flags = RPC_TASK_ASYNC,
5905 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005906 int ret;
5907
Harvey Harrison3110ff82008-05-02 13:42:44 -07005908 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005909 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005910 fl->fl_u.nfs4_fl.owner,
5911 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005912 if (data == NULL)
5913 return -ENOMEM;
5914 if (IS_SETLKW(cmd))
5915 data->arg.block = 1;
Chuck Levera9c92d62013-08-09 12:48:18 -04005916 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005917 msg.rpc_argp = &data->arg;
5918 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005919 task_setup_data.callback_data = data;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005920 if (recovery_type > NFS_LOCK_NEW) {
5921 if (recovery_type == NFS_LOCK_RECLAIM)
5922 data->arg.reclaim = NFS_LOCK_RECLAIM;
5923 nfs4_set_sequence_privileged(&data->arg.seq_args);
Trond Myklebustc69899a2015-01-24 16:03:52 -05005924 } else
5925 data->arg.new_lock = 1;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005926 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005927 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005928 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005929 ret = nfs4_wait_for_completion_rpc_task(task);
5930 if (ret == 0) {
5931 ret = data->rpc_status;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005932 if (ret)
5933 nfs4_handle_setlk_error(data->server, data->lsp,
5934 data->arg.new_lock_owner, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005935 } else
5936 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005937 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005938 dprintk("%s: done, ret = %d!\n", __func__, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005939 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005940}
5941
5942static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5943{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005944 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005945 struct nfs4_exception exception = {
5946 .inode = state->inode,
5947 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005948 int err;
5949
5950 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005951 /* Cache the lock if possible... */
5952 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5953 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005954 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005955 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
Trond Myklebust168667c2010-10-19 19:47:49 -04005956 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00005957 break;
5958 nfs4_handle_exception(server, err, &exception);
5959 } while (exception.retry);
5960 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005961}
5962
5963static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5964{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005965 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005966 struct nfs4_exception exception = {
5967 .inode = state->inode,
5968 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005969 int err;
5970
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005971 err = nfs4_set_lock_state(state, request);
5972 if (err != 0)
5973 return err;
Trond Myklebustf6de7a32013-09-04 10:08:54 -04005974 if (!recover_lost_locks) {
NeilBrownef1820f2013-09-04 17:04:49 +10005975 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5976 return 0;
5977 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005978 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5980 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005981 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005982 trace_nfs4_lock_expired(request, state, F_SETLK, err);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005983 switch (err) {
5984 default:
5985 goto out;
5986 case -NFS4ERR_GRACE:
5987 case -NFS4ERR_DELAY:
5988 nfs4_handle_exception(server, err, &exception);
5989 err = 0;
5990 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005991 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005992out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00005993 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005994}
5995
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005996#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04005997/**
5998 * nfs41_check_expired_locks - possibly free a lock stateid
5999 *
6000 * @state: NFSv4 state for an inode
6001 *
6002 * Returns NFS_OK if recovery for this stateid is now finished.
6003 * Otherwise a negative NFS4ERR value is returned.
6004 */
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006005static int nfs41_check_expired_locks(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006006{
Chuck Levereb64cf92012-07-11 16:30:05 -04006007 int status, ret = -NFS4ERR_BAD_STATEID;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006008 struct nfs4_lock_state *lsp;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006009 struct nfs_server *server = NFS_SERVER(state->inode);
6010
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006011 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
Trond Myklebust795a88c2012-09-10 13:26:49 -04006012 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04006013 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6014
6015 status = nfs41_test_stateid(server,
6016 &lsp->ls_stateid,
6017 cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04006018 trace_nfs4_test_lock_stateid(state, lsp, status);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006019 if (status != NFS_OK) {
Chuck Lever3e60ffd2012-07-11 16:30:14 -04006020 /* Free the stateid unless the server
6021 * informs us the stateid is unrecognized. */
Chuck Lever89af2732012-07-11 16:29:56 -04006022 if (status != -NFS4ERR_BAD_STATEID)
6023 nfs41_free_stateid(server,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04006024 &lsp->ls_stateid,
6025 cred);
Trond Myklebust795a88c2012-09-10 13:26:49 -04006026 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05006027 ret = status;
6028 }
6029 }
6030 };
6031
6032 return ret;
6033}
6034
6035static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6036{
6037 int status = NFS_OK;
6038
6039 if (test_bit(LK_STATE_IN_USE, &state->flags))
6040 status = nfs41_check_expired_locks(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04006041 if (status != NFS_OK)
6042 status = nfs4_lock_expired(state, request);
6043 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04006044}
6045#endif
6046
Linus Torvalds1da177e2005-04-16 15:20:36 -07006047static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6048{
Trond Myklebust19e03c52008-12-23 15:21:44 -05006049 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006050 unsigned char fl_flags = request->fl_flags;
Trond Myklebust8e469eb2010-01-26 15:42:30 -05006051 int status = -ENOLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006052
Trond Myklebust8e469eb2010-01-26 15:42:30 -05006053 if ((fl_flags & FL_POSIX) &&
6054 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6055 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05006056 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05006057 status = nfs4_set_lock_state(state, request);
6058 if (status != 0)
6059 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04006060 request->fl_flags |= FL_ACCESS;
Jeff Layton83bfff22015-07-11 06:43:03 -04006061 status = do_vfs_lock(state->inode, request);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006062 if (status < 0)
6063 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05006064 down_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006065 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust01c3b862006-06-29 16:38:39 -04006066 /* Yes: cache locks! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04006067 /* ...but avoid races with delegation recall... */
Trond Myklebust19e03c52008-12-23 15:21:44 -05006068 request->fl_flags = fl_flags & ~FL_SLEEP;
Jeff Layton83bfff22015-07-11 06:43:03 -04006069 status = do_vfs_lock(state->inode, request);
Trond Myklebustc69899a2015-01-24 16:03:52 -05006070 up_read(&nfsi->rwsem);
6071 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04006072 }
Trond Myklebust9a99af492013-02-04 20:17:49 -05006073 up_read(&nfsi->rwsem);
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08006074 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
Trond Myklebust01c3b862006-06-29 16:38:39 -04006075out:
6076 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006077 return status;
6078}
6079
6080static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6081{
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05006082 struct nfs4_exception exception = {
6083 .state = state,
Trond Myklebust05ffe242012-04-18 12:20:10 -04006084 .inode = state->inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05006085 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07006086 int err;
6087
6088 do {
Trond Myklebust965b5d62009-06-17 13:22:59 -07006089 err = _nfs4_proc_setlk(state, cmd, request);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04006090 trace_nfs4_set_lock(request, state, cmd, err);
Trond Myklebust965b5d62009-06-17 13:22:59 -07006091 if (err == -NFS4ERR_DENIED)
6092 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006093 err = nfs4_handle_exception(NFS_SERVER(state->inode),
Trond Myklebust965b5d62009-06-17 13:22:59 -07006094 err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006095 } while (exception.retry);
6096 return err;
6097}
6098
6099static int
6100nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6101{
6102 struct nfs_open_context *ctx;
6103 struct nfs4_state *state;
6104 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6105 int status;
6106
6107 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04006108 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006109 state = ctx->state;
6110
6111 if (request->fl_start < 0 || request->fl_end < 0)
6112 return -EINVAL;
6113
Trond Myklebustd9531262009-07-21 19:22:38 -04006114 if (IS_GETLK(cmd)) {
6115 if (state != NULL)
6116 return nfs4_proc_getlk(state, F_GETLK, request);
6117 return 0;
6118 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006119
6120 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6121 return -EINVAL;
6122
Trond Myklebustd9531262009-07-21 19:22:38 -04006123 if (request->fl_type == F_UNLCK) {
6124 if (state != NULL)
6125 return nfs4_proc_unlck(state, cmd, request);
6126 return 0;
6127 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006128
Trond Myklebustd9531262009-07-21 19:22:38 -04006129 if (state == NULL)
6130 return -ENOLCK;
Trond Myklebust55725512012-04-18 12:48:35 -04006131 /*
6132 * Don't rely on the VFS having checked the file open mode,
6133 * since it won't do this for flock() locks.
6134 */
Jeff Laytonf44106e2012-07-23 15:49:56 -04006135 switch (request->fl_type) {
Trond Myklebust55725512012-04-18 12:48:35 -04006136 case F_RDLCK:
6137 if (!(filp->f_mode & FMODE_READ))
6138 return -EBADF;
6139 break;
6140 case F_WRLCK:
6141 if (!(filp->f_mode & FMODE_WRITE))
6142 return -EBADF;
6143 }
6144
Linus Torvalds1da177e2005-04-16 15:20:36 -07006145 do {
6146 status = nfs4_proc_setlk(state, cmd, request);
6147 if ((status != -EAGAIN) || IS_SETLK(cmd))
6148 break;
6149 timeout = nfs4_set_lock_task_retry(timeout);
6150 status = -ERESTARTSYS;
6151 if (signalled())
6152 break;
6153 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006154 return status;
6155}
6156
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006157int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
Trond Myklebust888e6942005-11-04 15:38:11 -05006158{
6159 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust888e6942005-11-04 15:38:11 -05006160 int err;
6161
6162 err = nfs4_set_lock_state(state, fl);
6163 if (err != 0)
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006164 return err;
Trond Myklebust4a706fa2013-04-01 14:47:22 -04006165 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04006166 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
Trond Myklebust888e6942005-11-04 15:38:11 -05006167}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006168
Trond Myklebustcf470c32012-03-07 13:49:12 -05006169struct nfs_release_lockowner_data {
6170 struct nfs4_lock_state *lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006171 struct nfs_server *server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006172 struct nfs_release_lockowner_args args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006173 struct nfs_release_lockowner_res res;
Chuck Lever60ea6812013-10-17 14:13:47 -04006174 unsigned long timestamp;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006175};
6176
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006177static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6178{
6179 struct nfs_release_lockowner_data *data = calldata;
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006180 struct nfs_server *server = data->server;
Peng Taocb04ad22014-06-11 05:24:15 +08006181 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6182 &data->args.seq_args, &data->res.seq_res, task);
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006183 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
Chuck Lever60ea6812013-10-17 14:13:47 -04006184 data->timestamp = jiffies;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006185}
6186
6187static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6188{
6189 struct nfs_release_lockowner_data *data = calldata;
Chuck Lever60ea6812013-10-17 14:13:47 -04006190 struct nfs_server *server = data->server;
6191
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006192 nfs40_sequence_done(task, &data->res.seq_res);
Chuck Lever60ea6812013-10-17 14:13:47 -04006193
6194 switch (task->tk_status) {
6195 case 0:
6196 renew_lease(server, data->timestamp);
6197 break;
6198 case -NFS4ERR_STALE_CLIENTID:
6199 case -NFS4ERR_EXPIRED:
Kinglong Mee5b53dc82014-08-04 16:18:16 +08006200 nfs4_schedule_lease_recovery(server->nfs_client);
6201 break;
Chuck Lever60ea6812013-10-17 14:13:47 -04006202 case -NFS4ERR_LEASE_MOVED:
6203 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10006204 if (nfs4_async_handle_error(task, server,
6205 NULL, NULL) == -EAGAIN)
Chuck Lever60ea6812013-10-17 14:13:47 -04006206 rpc_restart_call_prepare(task);
6207 }
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006208}
6209
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006210static void nfs4_release_lockowner_release(void *calldata)
6211{
Trond Myklebustcf470c32012-03-07 13:49:12 -05006212 struct nfs_release_lockowner_data *data = calldata;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006213 nfs4_free_lock_state(data->server, data->lsp);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006214 kfree(calldata);
6215}
6216
Trond Myklebust17280172012-03-11 13:11:00 -04006217static const struct rpc_call_ops nfs4_release_lockowner_ops = {
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006218 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6219 .rpc_call_done = nfs4_release_lockowner_done,
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006220 .rpc_release = nfs4_release_lockowner_release,
6221};
6222
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006223static void
6224nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006225{
Trond Myklebustcf470c32012-03-07 13:49:12 -05006226 struct nfs_release_lockowner_data *data;
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006227 struct rpc_message msg = {
6228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6229 };
6230
6231 if (server->nfs_client->cl_mvops->minor_version != 0)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006232 return;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006233
Trond Myklebustcf470c32012-03-07 13:49:12 -05006234 data = kmalloc(sizeof(*data), GFP_NOFS);
6235 if (!data)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006236 return;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006237 data->lsp = lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006238 data->server = server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006239 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6240 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6241 data->args.lock_owner.s_dev = server->s_dev;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006242
Trond Myklebustcf470c32012-03-07 13:49:12 -05006243 msg.rpc_argp = &data->args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006244 msg.rpc_resp = &data->res;
6245 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebustcf470c32012-03-07 13:49:12 -05006246 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006247}
6248
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006249#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6250
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006251static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6252 struct dentry *dentry, const char *key,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006253 const void *buf, size_t buflen,
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006254 int flags)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006255{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006256 if (strcmp(key, "") != 0)
6257 return -EINVAL;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00006258
David Howells2b0143b2015-03-17 22:25:59 +00006259 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006260}
6261
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006262static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6263 struct dentry *dentry, const char *key,
6264 void *buf, size_t buflen)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006265{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006266 if (strcmp(key, "") != 0)
6267 return -EINVAL;
J. Bruce Fieldsaa1870a2005-06-22 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 Gruenbacherd9a82a02015-10-04 19:18:51 +02006272static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
6273 struct dentry *dentry, char *list,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006274 size_t list_len, const char *name,
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006275 size_t name_len)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006276{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006277 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006278
David Howells2b0143b2015-03-17 22:25:59 +00006279 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
J. Bruce Fields096455a2006-03-20 23:23:42 -05006280 return 0;
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006281
6282 if (list && len <= list_len)
6283 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006284 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006285}
6286
David Quigleyc9bccef2013-05-22 12:50:45 -04006287#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6288static inline int nfs4_server_supports_labels(struct nfs_server *server)
6289{
6290 return server->caps & NFS_CAP_SECURITY_LABEL;
6291}
6292
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006293static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6294 struct dentry *dentry, const char *key,
6295 const void *buf, size_t buflen,
6296 int flags)
David Quigleyc9bccef2013-05-22 12:50:45 -04006297{
6298 if (security_ismaclabel(key))
6299 return nfs4_set_security_label(dentry, buf, buflen);
6300
6301 return -EOPNOTSUPP;
6302}
6303
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006304static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6305 struct dentry *dentry, const char *key,
6306 void *buf, size_t buflen)
David Quigleyc9bccef2013-05-22 12:50:45 -04006307{
6308 if (security_ismaclabel(key))
David Howells2b0143b2015-03-17 22:25:59 +00006309 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
David Quigleyc9bccef2013-05-22 12:50:45 -04006310 return -EOPNOTSUPP;
6311}
6312
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02006313static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
6314 struct dentry *dentry, char *list,
6315 size_t list_len, const char *name,
6316 size_t name_len)
David Quigleyc9bccef2013-05-22 12:50:45 -04006317{
6318 size_t len = 0;
6319
David Howells2b0143b2015-03-17 22:25:59 +00006320 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6321 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
David Quigleyc9bccef2013-05-22 12:50:45 -04006322 if (list && len <= list_len)
David Howells2b0143b2015-03-17 22:25:59 +00006323 security_inode_listsecurity(d_inode(dentry), list, len);
David Quigleyc9bccef2013-05-22 12:50:45 -04006324 }
6325 return len;
6326}
6327
6328static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6329 .prefix = XATTR_SECURITY_PREFIX,
6330 .list = nfs4_xattr_list_nfs4_label,
6331 .get = nfs4_xattr_get_nfs4_label,
6332 .set = nfs4_xattr_set_nfs4_label,
6333};
6334#endif
6335
6336
Andy Adamson533eb462011-06-13 18:25:56 -04006337/*
6338 * nfs_fhget will use either the mounted_on_fileid or the fileid
6339 */
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006340static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6341{
Andy Adamson533eb462011-06-13 18:25:56 -04006342 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6343 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6344 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Chuck Lever81934dd2012-03-01 17:01:57 -05006345 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006346 return;
6347
6348 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Chuck Lever81934dd2012-03-01 17:01:57 -05006349 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006350 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6351 fattr->nlink = 2;
6352}
6353
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006354static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6355 const struct qstr *name,
6356 struct nfs4_fs_locations *fs_locations,
6357 struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04006358{
6359 struct nfs_server *server = NFS_SERVER(dir);
David Quigleya09df2c2013-05-22 12:50:41 -04006360 u32 bitmask[3] = {
Manoj Naik361e6242006-06-09 09:34:24 -04006361 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006362 };
6363 struct nfs4_fs_locations_arg args = {
6364 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05006365 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006366 .page = page,
6367 .bitmask = bitmask,
6368 };
Benny Halevy22958462009-04-01 09:22:02 -04006369 struct nfs4_fs_locations_res res = {
6370 .fs_locations = fs_locations,
6371 };
Trond Myklebust683b57b2006-06-09 09:34:22 -04006372 struct rpc_message msg = {
6373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6374 .rpc_argp = &args,
Benny Halevy22958462009-04-01 09:22:02 -04006375 .rpc_resp = &res,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006376 };
6377 int status;
6378
Harvey Harrison3110ff82008-05-02 13:42:44 -07006379 dprintk("%s: start\n", __func__);
Andy Adamson533eb462011-06-13 18:25:56 -04006380
6381 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6382 * is not supported */
6383 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6384 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6385 else
6386 bitmask[0] |= FATTR4_WORD0_FILEID;
6387
Trond Myklebustc228fd32007-01-13 02:28:11 -05006388 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006389 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04006390 fs_locations->nlocations = 0;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006391 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -07006392 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006393 return status;
6394}
6395
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006396int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6397 const struct qstr *name,
6398 struct nfs4_fs_locations *fs_locations,
6399 struct page *page)
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006400{
6401 struct nfs4_exception exception = { };
6402 int err;
6403 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006404 err = _nfs4_proc_fs_locations(client, dir, name,
6405 fs_locations, page);
6406 trace_nfs4_get_fs_locations(dir, name, err);
6407 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006408 &exception);
6409 } while (exception.retry);
6410 return err;
6411}
6412
Chuck Leverb03d7352013-10-17 14:12:50 -04006413/*
6414 * This operation also signals the server that this client is
6415 * performing migration recovery. The server can stop returning
6416 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6417 * appended to this compound to identify the client ID which is
6418 * performing recovery.
6419 */
6420static int _nfs40_proc_get_locations(struct inode *inode,
6421 struct nfs4_fs_locations *locations,
6422 struct page *page, struct rpc_cred *cred)
6423{
6424 struct nfs_server *server = NFS_SERVER(inode);
6425 struct rpc_clnt *clnt = server->client;
6426 u32 bitmask[2] = {
6427 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6428 };
6429 struct nfs4_fs_locations_arg args = {
6430 .clientid = server->nfs_client->cl_clientid,
6431 .fh = NFS_FH(inode),
6432 .page = page,
6433 .bitmask = bitmask,
6434 .migration = 1, /* skip LOOKUP */
6435 .renew = 1, /* append RENEW */
6436 };
6437 struct nfs4_fs_locations_res res = {
6438 .fs_locations = locations,
6439 .migration = 1,
6440 .renew = 1,
6441 };
6442 struct rpc_message msg = {
6443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6444 .rpc_argp = &args,
6445 .rpc_resp = &res,
6446 .rpc_cred = cred,
6447 };
6448 unsigned long now = jiffies;
6449 int status;
6450
6451 nfs_fattr_init(&locations->fattr);
6452 locations->server = server;
6453 locations->nlocations = 0;
6454
6455 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6456 nfs4_set_sequence_privileged(&args.seq_args);
6457 status = nfs4_call_sync_sequence(clnt, server, &msg,
6458 &args.seq_args, &res.seq_res);
6459 if (status)
6460 return status;
6461
6462 renew_lease(server, now);
6463 return 0;
6464}
6465
6466#ifdef CONFIG_NFS_V4_1
6467
6468/*
6469 * This operation also signals the server that this client is
6470 * performing migration recovery. The server can stop asserting
6471 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6472 * performing this operation is identified in the SEQUENCE
6473 * operation in this compound.
6474 *
6475 * When the client supports GETATTR(fs_locations_info), it can
6476 * be plumbed in here.
6477 */
6478static int _nfs41_proc_get_locations(struct inode *inode,
6479 struct nfs4_fs_locations *locations,
6480 struct page *page, struct rpc_cred *cred)
6481{
6482 struct nfs_server *server = NFS_SERVER(inode);
6483 struct rpc_clnt *clnt = server->client;
6484 u32 bitmask[2] = {
6485 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6486 };
6487 struct nfs4_fs_locations_arg args = {
6488 .fh = NFS_FH(inode),
6489 .page = page,
6490 .bitmask = bitmask,
6491 .migration = 1, /* skip LOOKUP */
6492 };
6493 struct nfs4_fs_locations_res res = {
6494 .fs_locations = locations,
6495 .migration = 1,
6496 };
6497 struct rpc_message msg = {
6498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6499 .rpc_argp = &args,
6500 .rpc_resp = &res,
6501 .rpc_cred = cred,
6502 };
6503 int status;
6504
6505 nfs_fattr_init(&locations->fattr);
6506 locations->server = server;
6507 locations->nlocations = 0;
6508
6509 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6510 nfs4_set_sequence_privileged(&args.seq_args);
6511 status = nfs4_call_sync_sequence(clnt, server, &msg,
6512 &args.seq_args, &res.seq_res);
6513 if (status == NFS4_OK &&
6514 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6515 status = -NFS4ERR_LEASE_MOVED;
6516 return status;
6517}
6518
6519#endif /* CONFIG_NFS_V4_1 */
6520
6521/**
6522 * nfs4_proc_get_locations - discover locations for a migrated FSID
6523 * @inode: inode on FSID that is migrating
6524 * @locations: result of query
6525 * @page: buffer
6526 * @cred: credential to use for this operation
6527 *
6528 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6529 * operation failed, or a negative errno if a local error occurred.
6530 *
6531 * On success, "locations" is filled in, but if the server has
6532 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6533 * asserted.
6534 *
6535 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6536 * from this client that require migration recovery.
6537 */
6538int nfs4_proc_get_locations(struct inode *inode,
6539 struct nfs4_fs_locations *locations,
6540 struct page *page, struct rpc_cred *cred)
6541{
6542 struct nfs_server *server = NFS_SERVER(inode);
6543 struct nfs_client *clp = server->nfs_client;
6544 const struct nfs4_mig_recovery_ops *ops =
6545 clp->cl_mvops->mig_recovery_ops;
6546 struct nfs4_exception exception = { };
6547 int status;
6548
6549 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6550 (unsigned long long)server->fsid.major,
6551 (unsigned long long)server->fsid.minor,
6552 clp->cl_hostname);
6553 nfs_display_fhandle(NFS_FH(inode), __func__);
6554
6555 do {
6556 status = ops->get_locations(inode, locations, page, cred);
6557 if (status != -NFS4ERR_DELAY)
6558 break;
6559 nfs4_handle_exception(server, status, &exception);
6560 } while (exception.retry);
6561 return status;
6562}
6563
Chuck Lever44c99932013-10-17 14:13:30 -04006564/*
6565 * This operation also signals the server that this client is
6566 * performing "lease moved" recovery. The server can stop
6567 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6568 * is appended to this compound to identify the client ID which is
6569 * performing recovery.
6570 */
6571static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6572{
6573 struct nfs_server *server = NFS_SERVER(inode);
6574 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6575 struct rpc_clnt *clnt = server->client;
6576 struct nfs4_fsid_present_arg args = {
6577 .fh = NFS_FH(inode),
6578 .clientid = clp->cl_clientid,
6579 .renew = 1, /* append RENEW */
6580 };
6581 struct nfs4_fsid_present_res res = {
6582 .renew = 1,
6583 };
6584 struct rpc_message msg = {
6585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6586 .rpc_argp = &args,
6587 .rpc_resp = &res,
6588 .rpc_cred = cred,
6589 };
6590 unsigned long now = jiffies;
6591 int status;
6592
6593 res.fh = nfs_alloc_fhandle();
6594 if (res.fh == NULL)
6595 return -ENOMEM;
6596
6597 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6598 nfs4_set_sequence_privileged(&args.seq_args);
6599 status = nfs4_call_sync_sequence(clnt, server, &msg,
6600 &args.seq_args, &res.seq_res);
6601 nfs_free_fhandle(res.fh);
6602 if (status)
6603 return status;
6604
6605 do_renew_lease(clp, now);
6606 return 0;
6607}
6608
6609#ifdef CONFIG_NFS_V4_1
6610
6611/*
6612 * This operation also signals the server that this client is
6613 * performing "lease moved" recovery. The server can stop asserting
6614 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6615 * this operation is identified in the SEQUENCE operation in this
6616 * compound.
6617 */
6618static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6619{
6620 struct nfs_server *server = NFS_SERVER(inode);
6621 struct rpc_clnt *clnt = server->client;
6622 struct nfs4_fsid_present_arg args = {
6623 .fh = NFS_FH(inode),
6624 };
6625 struct nfs4_fsid_present_res res = {
6626 };
6627 struct rpc_message msg = {
6628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6629 .rpc_argp = &args,
6630 .rpc_resp = &res,
6631 .rpc_cred = cred,
6632 };
6633 int status;
6634
6635 res.fh = nfs_alloc_fhandle();
6636 if (res.fh == NULL)
6637 return -ENOMEM;
6638
6639 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6640 nfs4_set_sequence_privileged(&args.seq_args);
6641 status = nfs4_call_sync_sequence(clnt, server, &msg,
6642 &args.seq_args, &res.seq_res);
6643 nfs_free_fhandle(res.fh);
6644 if (status == NFS4_OK &&
6645 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6646 status = -NFS4ERR_LEASE_MOVED;
6647 return status;
6648}
6649
6650#endif /* CONFIG_NFS_V4_1 */
6651
6652/**
6653 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6654 * @inode: inode on FSID to check
6655 * @cred: credential to use for this operation
6656 *
6657 * Server indicates whether the FSID is present, moved, or not
6658 * recognized. This operation is necessary to clear a LEASE_MOVED
6659 * condition for this client ID.
6660 *
6661 * Returns NFS4_OK if the FSID is present on this server,
6662 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6663 * NFS4ERR code if some error occurred on the server, or a
6664 * negative errno if a local failure occurred.
6665 */
6666int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6667{
6668 struct nfs_server *server = NFS_SERVER(inode);
6669 struct nfs_client *clp = server->nfs_client;
6670 const struct nfs4_mig_recovery_ops *ops =
6671 clp->cl_mvops->mig_recovery_ops;
6672 struct nfs4_exception exception = { };
6673 int status;
6674
6675 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6676 (unsigned long long)server->fsid.major,
6677 (unsigned long long)server->fsid.minor,
6678 clp->cl_hostname);
6679 nfs_display_fhandle(NFS_FH(inode), __func__);
6680
6681 do {
6682 status = ops->fsid_present(inode, cred);
6683 if (status != -NFS4ERR_DELAY)
6684 break;
6685 nfs4_handle_exception(server, status, &exception);
6686 } while (exception.retry);
6687 return status;
6688}
6689
Andy Adamson5ec16a82013-08-08 10:57:55 -04006690/**
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006691 * If 'use_integrity' is true and the state managment nfs_client
6692 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6693 * and the machine credential as per RFC3530bis and RFC5661 Security
6694 * Considerations sections. Otherwise, just use the user cred with the
6695 * filesystem's rpc_client.
Andy Adamson5ec16a82013-08-08 10:57:55 -04006696 */
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006697static 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 +00006698{
6699 int status;
6700 struct nfs4_secinfo_arg args = {
6701 .dir_fh = NFS_FH(dir),
6702 .name = name,
6703 };
6704 struct nfs4_secinfo_res res = {
6705 .flavors = flavors,
6706 };
6707 struct rpc_message msg = {
6708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6709 .rpc_argp = &args,
6710 .rpc_resp = &res,
6711 };
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006712 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006713 struct rpc_cred *cred = NULL;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006714
6715 if (use_integrity) {
6716 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006717 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6718 msg.rpc_cred = cred;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006719 }
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006720
6721 dprintk("NFS call secinfo %s\n", name->name);
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006722
6723 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6724 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6725
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006726 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6727 &res.seq_res, 0);
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006728 dprintk("NFS reply secinfo: %d\n", status);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006729
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006730 if (cred)
6731 put_rpccred(cred);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006732
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006733 return status;
6734}
6735
Bryan Schumaker72de53e2012-04-27 13:27:40 -04006736int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6737 struct nfs4_secinfo_flavors *flavors)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006738{
6739 struct nfs4_exception exception = { };
6740 int err;
6741 do {
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006742 err = -NFS4ERR_WRONGSEC;
6743
6744 /* try to use integrity protection with machine cred */
6745 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6746 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6747
6748 /*
6749 * if unable to use integrity protection, or SECINFO with
6750 * integrity protection returns NFS4ERR_WRONGSEC (which is
6751 * disallowed by spec, but exists in deployed servers) use
6752 * the current filesystem's rpc_client and the user cred.
6753 */
6754 if (err == -NFS4ERR_WRONGSEC)
6755 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6756
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006757 trace_nfs4_secinfo(dir, name, err);
6758 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006759 &exception);
6760 } while (exception.retry);
6761 return err;
6762}
6763
Andy Adamson557134a2009-04-01 09:21:53 -04006764#ifdef CONFIG_NFS_V4_1
Benny Halevy99fe60d2009-04-01 09:22:29 -04006765/*
Andy Adamson357f54d2010-12-14 10:11:57 -05006766 * Check the exchange flags returned by the server for invalid flags, having
6767 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6768 * DS flags set.
6769 */
6770static int nfs4_check_cl_exchange_flags(u32 flags)
6771{
6772 if (flags & ~EXCHGID4_FLAG_MASK_R)
6773 goto out_inval;
6774 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6775 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6776 goto out_inval;
6777 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6778 goto out_inval;
6779 return NFS_OK;
6780out_inval:
6781 return -NFS4ERR_INVAL;
6782}
6783
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006784static bool
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006785nfs41_same_server_scope(struct nfs41_server_scope *a,
6786 struct nfs41_server_scope *b)
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006787{
6788 if (a->server_scope_sz == b->server_scope_sz &&
6789 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6790 return true;
6791
6792 return false;
6793}
6794
Andy Adamson357f54d2010-12-14 10:11:57 -05006795/*
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006796 * nfs4_proc_bind_conn_to_session()
6797 *
6798 * The 4.1 client currently uses the same TCP connection for the
6799 * fore and backchannel.
6800 */
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006801int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006802{
6803 int status;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006804 struct nfs41_bind_conn_to_session_args args = {
6805 .client = clp,
6806 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6807 };
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006808 struct nfs41_bind_conn_to_session_res res;
6809 struct rpc_message msg = {
6810 .rpc_proc =
6811 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
Trond Myklebust71a097c2015-02-18 09:27:18 -08006812 .rpc_argp = &args,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006813 .rpc_resp = &res,
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006814 .rpc_cred = cred,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006815 };
6816
6817 dprintk("--> %s\n", __func__);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006818
Trond Myklebust71a097c2015-02-18 09:27:18 -08006819 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6820 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6821 args.dir = NFS4_CDFC4_FORE;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006822
6823 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006824 trace_nfs4_bind_conn_to_session(clp, status);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006825 if (status == 0) {
Trond Myklebust71a097c2015-02-18 09:27:18 -08006826 if (memcmp(res.sessionid.data,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006827 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6828 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6829 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006830 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006831 }
Trond Myklebust71a097c2015-02-18 09:27:18 -08006832 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006833 dprintk("NFS: %s: Unexpected direction from server\n",
6834 __func__);
6835 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006836 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006837 }
Trond Myklebust71a097c2015-02-18 09:27:18 -08006838 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006839 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6840 __func__);
6841 status = -EIO;
Trond Myklebust71a097c2015-02-18 09:27:18 -08006842 goto out;
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006843 }
6844 }
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006845out:
6846 dprintk("<-- %s status= %d\n", __func__, status);
6847 return status;
6848}
6849
6850/*
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006851 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6852 * and operations we'd like to see to enable certain features in the allow map
Benny Halevy99fe60d2009-04-01 09:22:29 -04006853 */
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006854static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6855 .how = SP4_MACH_CRED,
6856 .enforce.u.words = {
6857 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6858 1 << (OP_EXCHANGE_ID - 32) |
6859 1 << (OP_CREATE_SESSION - 32) |
6860 1 << (OP_DESTROY_SESSION - 32) |
6861 1 << (OP_DESTROY_CLIENTID - 32)
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006862 },
6863 .allow.u.words = {
6864 [0] = 1 << (OP_CLOSE) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006865 1 << (OP_LOCKU) |
6866 1 << (OP_COMMIT),
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006867 [1] = 1 << (OP_SECINFO - 32) |
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006868 1 << (OP_SECINFO_NO_NAME - 32) |
6869 1 << (OP_TEST_STATEID - 32) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006870 1 << (OP_FREE_STATEID - 32) |
6871 1 << (OP_WRITE - 32)
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006872 }
6873};
6874
6875/*
6876 * Select the state protection mode for client `clp' given the server results
6877 * from exchange_id in `sp'.
6878 *
6879 * Returns 0 on success, negative errno otherwise.
6880 */
6881static int nfs4_sp4_select_mode(struct nfs_client *clp,
6882 struct nfs41_state_protection *sp)
6883{
6884 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6885 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6886 1 << (OP_EXCHANGE_ID - 32) |
6887 1 << (OP_CREATE_SESSION - 32) |
6888 1 << (OP_DESTROY_SESSION - 32) |
6889 1 << (OP_DESTROY_CLIENTID - 32)
6890 };
6891 unsigned int i;
6892
6893 if (sp->how == SP4_MACH_CRED) {
6894 /* Print state protect result */
6895 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6896 for (i = 0; i <= LAST_NFS4_OP; i++) {
6897 if (test_bit(i, sp->enforce.u.longs))
6898 dfprintk(MOUNT, " enforce op %d\n", i);
6899 if (test_bit(i, sp->allow.u.longs))
6900 dfprintk(MOUNT, " allow op %d\n", i);
6901 }
6902
6903 /* make sure nothing is on enforce list that isn't supported */
6904 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6905 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6906 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6907 return -EINVAL;
6908 }
6909 }
6910
6911 /*
6912 * Minimal mode - state operations are allowed to use machine
6913 * credential. Note this already happens by default, so the
6914 * client doesn't have to do anything more than the negotiation.
6915 *
6916 * NOTE: we don't care if EXCHANGE_ID is in the list -
6917 * we're already using the machine cred for exchange_id
6918 * and will never use a different cred.
6919 */
6920 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6921 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6922 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6923 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6924 dfprintk(MOUNT, "sp4_mach_cred:\n");
6925 dfprintk(MOUNT, " minimal mode enabled\n");
6926 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6927 } else {
6928 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6929 return -EINVAL;
6930 }
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006931
6932 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6933 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6934 dfprintk(MOUNT, " cleanup mode enabled\n");
6935 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6936 }
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006937
6938 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6939 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6940 dfprintk(MOUNT, " secinfo mode enabled\n");
6941 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6942 }
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006943
6944 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6945 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6946 dfprintk(MOUNT, " stateid mode enabled\n");
6947 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6948 }
Weston Andros Adamson8c21c622013-08-13 16:37:37 -04006949
6950 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6951 dfprintk(MOUNT, " write mode enabled\n");
6952 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6953 }
6954
6955 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6956 dfprintk(MOUNT, " commit mode enabled\n");
6957 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6958 }
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006959 }
6960
6961 return 0;
6962}
6963
6964/*
6965 * _nfs4_proc_exchange_id()
6966 *
6967 * Wrapper for EXCHANGE_ID operation.
6968 */
6969static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6970 u32 sp4_how)
Benny Halevy99fe60d2009-04-01 09:22:29 -04006971{
6972 nfs4_verifier verifier;
6973 struct nfs41_exchange_id_args args = {
Chuck Levercd937102012-03-02 17:14:31 -05006974 .verifier = &verifier,
Benny Halevy99fe60d2009-04-01 09:22:29 -04006975 .client = clp,
Chuck Levercd3fade2013-10-17 14:14:04 -04006976#ifdef CONFIG_NFS_V4_1_MIGRATION
Trond Myklebust4f0b4292013-05-20 12:24:03 -04006977 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
Chuck Levercd3fade2013-10-17 14:14:04 -04006978 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6979 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6980#else
6981 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6982 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6983#endif
Benny Halevy99fe60d2009-04-01 09:22:29 -04006984 };
6985 struct nfs41_exchange_id_res res = {
Trond Myklebust32b01312012-05-26 13:41:04 -04006986 0
Benny Halevy99fe60d2009-04-01 09:22:29 -04006987 };
6988 int status;
6989 struct rpc_message msg = {
6990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6991 .rpc_argp = &args,
6992 .rpc_resp = &res,
6993 .rpc_cred = cred,
6994 };
Benny Halevy99fe60d2009-04-01 09:22:29 -04006995
Chuck Leverf0920752012-05-21 22:45:41 -04006996 nfs4_init_boot_verifier(clp, &verifier);
Jeff Layton873e3852015-06-09 19:44:00 -04006997
6998 status = nfs4_init_uniform_client_string(clp);
6999 if (status)
Jeff Layton3a6bb732015-06-09 19:43:57 -04007000 goto out;
Jeff Layton3a6bb732015-06-09 19:43:57 -04007001
7002 dprintk("NFS call exchange_id auth=%s, '%s'\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007003 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Jeff Layton3a6bb732015-06-09 19:43:57 -04007004 clp->cl_owner_id);
Benny Halevy99fe60d2009-04-01 09:22:29 -04007005
Chuck Leveracdeb692012-05-21 22:46:16 -04007006 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007007 GFP_NOFS);
Chuck Leveracdeb692012-05-21 22:46:16 -04007008 if (unlikely(res.server_owner == NULL)) {
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007009 status = -ENOMEM;
7010 goto out;
7011 }
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007012
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007013 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007014 GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04007015 if (unlikely(res.server_scope == NULL)) {
Benny Halevy99fe60d2009-04-01 09:22:29 -04007016 status = -ENOMEM;
Chuck Leveracdeb692012-05-21 22:46:16 -04007017 goto out_server_owner;
Benny Halevy99fe60d2009-04-01 09:22:29 -04007018 }
7019
Trond Myklebustbbafffd2012-05-24 16:31:39 -04007020 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04007021 if (unlikely(res.impl_id == NULL)) {
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007022 status = -ENOMEM;
7023 goto out_server_scope;
7024 }
7025
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007026 switch (sp4_how) {
7027 case SP4_NONE:
7028 args.state_protect.how = SP4_NONE;
7029 break;
7030
7031 case SP4_MACH_CRED:
7032 args.state_protect = nfs4_sp4_mach_cred_request;
7033 break;
7034
7035 default:
7036 /* unsupported! */
7037 WARN_ON_ONCE(1);
7038 status = -EINVAL;
Kinglong Mee6b559702015-07-01 11:54:53 +08007039 goto out_impl_id;
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007040 }
7041
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007042 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007043 trace_nfs4_exchange_id(clp, status);
Chuck Lever177313f2012-05-21 22:44:58 -04007044 if (status == 0)
Trond Myklebust32b01312012-05-26 13:41:04 -04007045 status = nfs4_check_cl_exchange_flags(res.flags);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007046
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007047 if (status == 0)
7048 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7049
Chuck Lever177313f2012-05-21 22:44:58 -04007050 if (status == 0) {
Trond Myklebust32b01312012-05-26 13:41:04 -04007051 clp->cl_clientid = res.clientid;
Trond Myklebuste11259f2015-03-03 20:35:31 -05007052 clp->cl_exchange_flags = res.flags;
7053 /* Client ID is not confirmed */
7054 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7055 clear_bit(NFS4_SESSION_ESTABLISHED,
7056 &clp->cl_session->session_state);
Trond Myklebust32b01312012-05-26 13:41:04 -04007057 clp->cl_seqid = res.seqid;
Trond Myklebuste11259f2015-03-03 20:35:31 -05007058 }
Trond Myklebust32b01312012-05-26 13:41:04 -04007059
Chuck Leveracdeb692012-05-21 22:46:16 -04007060 kfree(clp->cl_serverowner);
7061 clp->cl_serverowner = res.server_owner;
7062 res.server_owner = NULL;
Chuck Leveracdeb692012-05-21 22:46:16 -04007063
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007064 /* use the most recent implementation id */
Chuck Lever59155542012-05-21 22:44:41 -04007065 kfree(clp->cl_implid);
7066 clp->cl_implid = res.impl_id;
Kinglong Mee6b559702015-07-01 11:54:53 +08007067 res.impl_id = NULL;
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007068
Chuck Lever177313f2012-05-21 22:44:58 -04007069 if (clp->cl_serverscope != NULL &&
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007070 !nfs41_same_server_scope(clp->cl_serverscope,
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007071 res.server_scope)) {
7072 dprintk("%s: server_scope mismatch detected\n",
7073 __func__);
7074 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007075 kfree(clp->cl_serverscope);
7076 clp->cl_serverscope = NULL;
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04007077 }
7078
Chuck Lever177313f2012-05-21 22:44:58 -04007079 if (clp->cl_serverscope == NULL) {
Chuck Lever79d4e1f2012-05-21 22:44:31 -04007080 clp->cl_serverscope = res.server_scope;
Kinglong Mee6b559702015-07-01 11:54:53 +08007081 res.server_scope = NULL;
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007082 }
Kinglong Mee6b559702015-07-01 11:54:53 +08007083 }
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007084
Kinglong Mee6b559702015-07-01 11:54:53 +08007085out_impl_id:
7086 kfree(res.impl_id);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007087out_server_scope:
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007088 kfree(res.server_scope);
Kinglong Mee6b559702015-07-01 11:54:53 +08007089out_server_owner:
7090 kfree(res.server_owner);
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05007091out:
Chuck Lever177313f2012-05-21 22:44:58 -04007092 if (clp->cl_implid != NULL)
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007093 dprintk("NFS reply exchange_id: Server Implementation ID: "
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05007094 "domain: %s, name: %s, date: %llu,%u\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007095 clp->cl_implid->domain, clp->cl_implid->name,
Chuck Lever59155542012-05-21 22:44:41 -04007096 clp->cl_implid->date.seconds,
7097 clp->cl_implid->date.nseconds);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04007098 dprintk("NFS reply exchange_id: %d\n", status);
Benny Halevy99fe60d2009-04-01 09:22:29 -04007099 return status;
7100}
7101
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04007102/*
7103 * nfs4_proc_exchange_id()
7104 *
7105 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7106 *
7107 * Since the clientid has expired, all compounds using sessions
7108 * associated with the stale clientid will be returning
7109 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7110 * be in some phase of session reset.
7111 *
7112 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7113 */
7114int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7115{
7116 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7117 int status;
7118
7119 /* try SP4_MACH_CRED if krb5i/p */
7120 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7121 authflavor == RPC_AUTH_GSS_KRB5P) {
7122 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7123 if (!status)
7124 return 0;
7125 }
7126
7127 /* try SP4_NONE */
7128 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7129}
7130
Trond Myklebust66245532012-05-25 17:18:09 -04007131static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7132 struct rpc_cred *cred)
7133{
7134 struct rpc_message msg = {
7135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7136 .rpc_argp = clp,
7137 .rpc_cred = cred,
7138 };
7139 int status;
7140
7141 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007142 trace_nfs4_destroy_clientid(clp, status);
Trond Myklebust66245532012-05-25 17:18:09 -04007143 if (status)
Trond Myklebust02c67522012-06-07 13:45:53 -04007144 dprintk("NFS: Got error %d from the server %s on "
Trond Myklebust66245532012-05-25 17:18:09 -04007145 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7146 return status;
7147}
7148
7149static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7150 struct rpc_cred *cred)
7151{
7152 unsigned int loop;
7153 int ret;
7154
7155 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7156 ret = _nfs4_proc_destroy_clientid(clp, cred);
7157 switch (ret) {
7158 case -NFS4ERR_DELAY:
7159 case -NFS4ERR_CLIENTID_BUSY:
7160 ssleep(1);
7161 break;
7162 default:
7163 return ret;
7164 }
7165 }
7166 return 0;
7167}
7168
7169int nfs4_destroy_clientid(struct nfs_client *clp)
7170{
7171 struct rpc_cred *cred;
7172 int ret = 0;
7173
7174 if (clp->cl_mvops->minor_version < 1)
7175 goto out;
7176 if (clp->cl_exchange_flags == 0)
7177 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -04007178 if (clp->cl_preserve_clid)
7179 goto out;
Chuck Lever73d8bde2013-07-24 12:28:37 -04007180 cred = nfs4_get_clid_cred(clp);
Trond Myklebust66245532012-05-25 17:18:09 -04007181 ret = nfs4_proc_destroy_clientid(clp, cred);
7182 if (cred)
7183 put_rpccred(cred);
7184 switch (ret) {
7185 case 0:
7186 case -NFS4ERR_STALE_CLIENTID:
7187 clp->cl_exchange_flags = 0;
7188 }
7189out:
7190 return ret;
7191}
7192
Andy Adamson2050f0c2009-04-01 09:22:30 -04007193struct nfs4_get_lease_time_data {
7194 struct nfs4_get_lease_time_args *args;
7195 struct nfs4_get_lease_time_res *res;
7196 struct nfs_client *clp;
7197};
7198
7199static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7200 void *calldata)
7201{
Andy Adamson2050f0c2009-04-01 09:22:30 -04007202 struct nfs4_get_lease_time_data *data =
7203 (struct nfs4_get_lease_time_data *)calldata;
7204
7205 dprintk("--> %s\n", __func__);
7206 /* just setup sequence, do not trigger session recovery
7207 since we're invoked within one */
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007208 nfs41_setup_sequence(data->clp->cl_session,
7209 &data->args->la_seq_args,
7210 &data->res->lr_seq_res,
7211 task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007212 dprintk("<-- %s\n", __func__);
7213}
7214
7215/*
7216 * Called from nfs4_state_manager thread for session setup, so don't recover
7217 * from sequence operation or clientid errors.
7218 */
7219static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7220{
7221 struct nfs4_get_lease_time_data *data =
7222 (struct nfs4_get_lease_time_data *)calldata;
7223
7224 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007225 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7226 return;
Andy Adamson2050f0c2009-04-01 09:22:30 -04007227 switch (task->tk_status) {
7228 case -NFS4ERR_DELAY:
7229 case -NFS4ERR_GRACE:
7230 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7231 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7232 task->tk_status = 0;
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007233 /* fall through */
7234 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustd00c5d42011-10-19 12:17:29 -07007235 rpc_restart_call_prepare(task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007236 return;
7237 }
Andy Adamson2050f0c2009-04-01 09:22:30 -04007238 dprintk("<-- %s\n", __func__);
7239}
7240
Trond Myklebust17280172012-03-11 13:11:00 -04007241static const struct rpc_call_ops nfs4_get_lease_time_ops = {
Andy Adamson2050f0c2009-04-01 09:22:30 -04007242 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7243 .rpc_call_done = nfs4_get_lease_time_done,
7244};
7245
7246int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7247{
7248 struct rpc_task *task;
7249 struct nfs4_get_lease_time_args args;
7250 struct nfs4_get_lease_time_res res = {
7251 .lr_fsinfo = fsinfo,
7252 };
7253 struct nfs4_get_lease_time_data data = {
7254 .args = &args,
7255 .res = &res,
7256 .clp = clp,
7257 };
7258 struct rpc_message msg = {
7259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7260 .rpc_argp = &args,
7261 .rpc_resp = &res,
7262 };
7263 struct rpc_task_setup task_setup = {
7264 .rpc_client = clp->cl_rpcclient,
7265 .rpc_message = &msg,
7266 .callback_ops = &nfs4_get_lease_time_ops,
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007267 .callback_data = &data,
7268 .flags = RPC_TASK_TIMEOUT,
Andy Adamson2050f0c2009-04-01 09:22:30 -04007269 };
7270 int status;
7271
Chuck Levera9c92d62013-08-09 12:48:18 -04007272 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007273 nfs4_set_sequence_privileged(&args.la_seq_args);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007274 dprintk("--> %s\n", __func__);
7275 task = rpc_run_task(&task_setup);
7276
7277 if (IS_ERR(task))
7278 status = PTR_ERR(task);
7279 else {
7280 status = task->tk_status;
7281 rpc_put_task(task);
7282 }
7283 dprintk("<-- %s return %d\n", __func__, status);
7284
7285 return status;
7286}
7287
Andy Adamsonfc931582009-04-01 09:22:31 -04007288/*
7289 * Initialize the values to be used by the client in CREATE_SESSION
7290 * If nfs4_init_session set the fore channel request and response sizes,
7291 * use them.
7292 *
7293 * Set the back channel max_resp_sz_cached to zero to force the client to
7294 * always set csa_cachethis to FALSE because the current implementation
7295 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7296 */
7297static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7298{
Andy Adamson18aad3d2013-06-26 12:21:49 -04007299 unsigned int max_rqst_sz, max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007300
Andy Adamson18aad3d2013-06-26 12:21:49 -04007301 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7302 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7303
Andy Adamsonfc931582009-04-01 09:22:31 -04007304 /* Fore channel attributes */
Andy Adamson18aad3d2013-06-26 12:21:49 -04007305 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7306 args->fc_attrs.max_resp_sz = max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007307 args->fc_attrs.max_ops = NFS4_MAX_OPS;
Trond Myklebustef159e92012-02-06 19:50:40 -05007308 args->fc_attrs.max_reqs = max_session_slots;
Andy Adamsonfc931582009-04-01 09:22:31 -04007309
7310 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
Mike Sager8e0d46e2009-12-17 12:06:26 -05007311 "max_ops=%u max_reqs=%u\n",
Andy Adamsonfc931582009-04-01 09:22:31 -04007312 __func__,
7313 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
Mike Sager8e0d46e2009-12-17 12:06:26 -05007314 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
Andy Adamsonfc931582009-04-01 09:22:31 -04007315
7316 /* Back channel attributes */
Andy Adamsonfc931582009-04-01 09:22:31 -04007317 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7318 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7319 args->bc_attrs.max_resp_sz_cached = 0;
7320 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7321 args->bc_attrs.max_reqs = 1;
7322
7323 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7324 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7325 __func__,
7326 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7327 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7328 args->bc_attrs.max_reqs);
7329}
7330
Trond Myklebust79969dd2015-02-18 11:30:18 -08007331static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7332 struct nfs41_create_session_res *res)
Andy Adamson8d353012009-04-01 09:22:32 -04007333{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007334 struct nfs4_channel_attrs *sent = &args->fc_attrs;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007335 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007336
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007337 if (rcvd->max_resp_sz > sent->max_resp_sz)
7338 return -EINVAL;
7339 /*
7340 * Our requested max_ops is the minimum we need; we're not
7341 * prepared to break up compounds into smaller pieces than that.
7342 * So, no point even trying to continue if the server won't
7343 * cooperate:
7344 */
7345 if (rcvd->max_ops < sent->max_ops)
7346 return -EINVAL;
7347 if (rcvd->max_reqs == 0)
7348 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007349 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7350 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007351 return 0;
Andy Adamson8d353012009-04-01 09:22:32 -04007352}
7353
Trond Myklebust79969dd2015-02-18 11:30:18 -08007354static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7355 struct nfs41_create_session_res *res)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007356{
7357 struct nfs4_channel_attrs *sent = &args->bc_attrs;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007358 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
Andy Adamson8d353012009-04-01 09:22:32 -04007359
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007360 if (!(res->flags & SESSION4_BACK_CHAN))
7361 goto out;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007362 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7363 return -EINVAL;
7364 if (rcvd->max_resp_sz < sent->max_resp_sz)
7365 return -EINVAL;
7366 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7367 return -EINVAL;
7368 /* These would render the backchannel useless: */
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007369 if (rcvd->max_ops != sent->max_ops)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007370 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007371 if (rcvd->max_reqs != sent->max_reqs)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007372 return -EINVAL;
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007373out:
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007374 return 0;
7375}
Andy Adamson8d353012009-04-01 09:22:32 -04007376
Andy Adamson8d353012009-04-01 09:22:32 -04007377static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
Trond Myklebust79969dd2015-02-18 11:30:18 -08007378 struct nfs41_create_session_res *res)
Andy Adamson8d353012009-04-01 09:22:32 -04007379{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007380 int ret;
Andy Adamson8d353012009-04-01 09:22:32 -04007381
Trond Myklebust79969dd2015-02-18 11:30:18 -08007382 ret = nfs4_verify_fore_channel_attrs(args, res);
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007383 if (ret)
7384 return ret;
Trond Myklebust79969dd2015-02-18 11:30:18 -08007385 return nfs4_verify_back_channel_attrs(args, res);
7386}
7387
7388static void nfs4_update_session(struct nfs4_session *session,
7389 struct nfs41_create_session_res *res)
7390{
7391 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
Trond Myklebuste11259f2015-03-03 20:35:31 -05007392 /* Mark client id and session as being confirmed */
7393 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7394 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
Trond Myklebust79969dd2015-02-18 11:30:18 -08007395 session->flags = res->flags;
7396 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
Trond Myklebustb1c0df52015-02-18 11:34:58 -08007397 if (res->flags & SESSION4_BACK_CHAN)
7398 memcpy(&session->bc_attrs, &res->bc_attrs,
7399 sizeof(session->bc_attrs));
Andy Adamson8d353012009-04-01 09:22:32 -04007400}
7401
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007402static int _nfs4_proc_create_session(struct nfs_client *clp,
7403 struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007404{
7405 struct nfs4_session *session = clp->cl_session;
7406 struct nfs41_create_session_args args = {
7407 .client = clp,
Trond Myklebust79969dd2015-02-18 11:30:18 -08007408 .clientid = clp->cl_clientid,
7409 .seqid = clp->cl_seqid,
Andy Adamsonfc931582009-04-01 09:22:31 -04007410 .cb_program = NFS4_CALLBACK,
7411 };
Trond Myklebust79969dd2015-02-18 11:30:18 -08007412 struct nfs41_create_session_res res;
7413
Andy Adamsonfc931582009-04-01 09:22:31 -04007414 struct rpc_message msg = {
7415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7416 .rpc_argp = &args,
7417 .rpc_resp = &res,
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007418 .rpc_cred = cred,
Andy Adamsonfc931582009-04-01 09:22:31 -04007419 };
7420 int status;
7421
7422 nfs4_init_channel_attrs(&args);
Andy Adamson0f914212009-04-01 09:23:16 -04007423 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
Andy Adamsonfc931582009-04-01 09:22:31 -04007424
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007425 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007426 trace_nfs4_create_session(clp, status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007427
Trond Myklebust43095d32012-11-20 11:13:12 -05007428 if (!status) {
Andy Adamson8d353012009-04-01 09:22:32 -04007429 /* Verify the session's negotiated channel_attrs values */
Trond Myklebust79969dd2015-02-18 11:30:18 -08007430 status = nfs4_verify_channel_attrs(&args, &res);
Andy Adamsonfc931582009-04-01 09:22:31 -04007431 /* Increment the clientid slot sequence id */
Trond Myklebust79969dd2015-02-18 11:30:18 -08007432 if (clp->cl_seqid == res.seqid)
7433 clp->cl_seqid++;
7434 if (status)
7435 goto out;
7436 nfs4_update_session(session, &res);
Andy Adamsonfc931582009-04-01 09:22:31 -04007437 }
Trond Myklebust79969dd2015-02-18 11:30:18 -08007438out:
Andy Adamsonfc931582009-04-01 09:22:31 -04007439 return status;
7440}
7441
7442/*
7443 * Issues a CREATE_SESSION operation to the server.
7444 * It is the responsibility of the caller to verify the session is
7445 * expired before calling this routine.
7446 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007447int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007448{
7449 int status;
7450 unsigned *ptr;
Andy Adamsonfc931582009-04-01 09:22:31 -04007451 struct nfs4_session *session = clp->cl_session;
7452
7453 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7454
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007455 status = _nfs4_proc_create_session(clp, cred);
Andy Adamsonfc931582009-04-01 09:22:31 -04007456 if (status)
7457 goto out;
7458
Andy Adamsonaacd5532011-11-09 13:58:21 -05007459 /* Init or reset the session slot tables */
7460 status = nfs4_setup_session_slot_tables(session);
7461 dprintk("slot table setup returned %d\n", status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007462 if (status)
7463 goto out;
7464
7465 ptr = (unsigned *)&session->sess_id.data[0];
7466 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7467 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
Andy Adamsonfc931582009-04-01 09:22:31 -04007468out:
7469 dprintk("<-- %s\n", __func__);
7470 return status;
7471}
7472
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007473/*
7474 * Issue the over-the-wire RPC DESTROY_SESSION.
7475 * The caller must serialize access to this routine.
7476 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007477int nfs4_proc_destroy_session(struct nfs4_session *session,
7478 struct rpc_cred *cred)
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007479{
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007480 struct rpc_message msg = {
7481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7482 .rpc_argp = session,
7483 .rpc_cred = cred,
7484 };
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007485 int status = 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007486
7487 dprintk("--> nfs4_proc_destroy_session\n");
7488
7489 /* session is still being setup */
Trond Myklebuste11259f2015-03-03 20:35:31 -05007490 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7491 return 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007492
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007493 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007494 trace_nfs4_destroy_session(session->clp, status);
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007495
7496 if (status)
Trond Myklebust08106ac2012-06-05 10:08:24 -04007497 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007498 "Session has been destroyed regardless...\n", status);
7499
7500 dprintk("<-- nfs4_proc_destroy_session\n");
7501 return status;
7502}
7503
Trond Myklebust7b38c362012-05-23 13:23:31 -04007504/*
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007505 * Renew the cl_session lease.
7506 */
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007507struct nfs4_sequence_data {
7508 struct nfs_client *clp;
7509 struct nfs4_sequence_args args;
7510 struct nfs4_sequence_res res;
7511};
7512
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007513static void nfs41_sequence_release(void *data)
7514{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007515 struct nfs4_sequence_data *calldata = data;
7516 struct nfs_client *clp = calldata->clp;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007517
Alexandros Batsakis71358402010-02-05 03:45:05 -08007518 if (atomic_read(&clp->cl_count) > 1)
7519 nfs4_schedule_state_renewal(clp);
7520 nfs_put_client(clp);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007521 kfree(calldata);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007522}
7523
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007524static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7525{
7526 switch(task->tk_status) {
7527 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007528 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7529 return -EAGAIN;
7530 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007531 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007532 }
7533 return 0;
7534}
7535
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007536static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007537{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007538 struct nfs4_sequence_data *calldata = data;
7539 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007540
Trond Myklebust14516c32010-07-31 14:29:06 -04007541 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7542 return;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007543
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007544 trace_nfs4_sequence(clp, task->tk_status);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007545 if (task->tk_status < 0) {
7546 dprintk("%s ERROR %d\n", __func__, task->tk_status);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007547 if (atomic_read(&clp->cl_count) == 1)
7548 goto out;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007549
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007550 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7551 rpc_restart_call_prepare(task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007552 return;
7553 }
7554 }
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007555 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007556out:
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007557 dprintk("<-- %s\n", __func__);
7558}
7559
7560static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7561{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007562 struct nfs4_sequence_data *calldata = data;
7563 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007564 struct nfs4_sequence_args *args;
7565 struct nfs4_sequence_res *res;
7566
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007567 args = task->tk_msg.rpc_argp;
7568 res = task->tk_msg.rpc_resp;
7569
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007570 nfs41_setup_sequence(clp->cl_session, args, res, task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007571}
7572
7573static const struct rpc_call_ops nfs41_sequence_ops = {
7574 .rpc_call_done = nfs41_sequence_call_done,
7575 .rpc_call_prepare = nfs41_sequence_prepare,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007576 .rpc_release = nfs41_sequence_release,
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007577};
7578
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007579static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7580 struct rpc_cred *cred,
7581 bool is_privileged)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007582{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007583 struct nfs4_sequence_data *calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007584 struct rpc_message msg = {
7585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7586 .rpc_cred = cred,
7587 };
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007588 struct rpc_task_setup task_setup_data = {
7589 .rpc_client = clp->cl_rpcclient,
7590 .rpc_message = &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007591 .callback_ops = &nfs41_sequence_ops,
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04007592 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007593 };
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007594
Alexandros Batsakis71358402010-02-05 03:45:05 -08007595 if (!atomic_inc_not_zero(&clp->cl_count))
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007596 return ERR_PTR(-EIO);
Benny Halevydfb4f3092010-09-24 09:17:01 -04007597 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007598 if (calldata == NULL) {
Alexandros Batsakis71358402010-02-05 03:45:05 -08007599 nfs_put_client(clp);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007600 return ERR_PTR(-ENOMEM);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007601 }
Chuck Levera9c92d62013-08-09 12:48:18 -04007602 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007603 if (is_privileged)
7604 nfs4_set_sequence_privileged(&calldata->args);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007605 msg.rpc_argp = &calldata->args;
7606 msg.rpc_resp = &calldata->res;
7607 calldata->clp = clp;
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007608 task_setup_data.callback_data = calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007609
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007610 return rpc_run_task(&task_setup_data);
7611}
7612
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007613static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007614{
7615 struct rpc_task *task;
7616 int ret = 0;
7617
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007618 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
Andy Adamsond1f456b2014-09-29 12:31:57 -04007619 return -EAGAIN;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007620 task = _nfs41_proc_sequence(clp, cred, false);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007621 if (IS_ERR(task))
7622 ret = PTR_ERR(task);
7623 else
Trond Myklebustbf294b42011-02-21 11:05:41 -08007624 rpc_put_task_async(task);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007625 dprintk("<-- %s status=%d\n", __func__, ret);
7626 return ret;
7627}
7628
7629static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7630{
7631 struct rpc_task *task;
7632 int ret;
7633
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007634 task = _nfs41_proc_sequence(clp, cred, true);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007635 if (IS_ERR(task)) {
7636 ret = PTR_ERR(task);
7637 goto out;
7638 }
7639 ret = rpc_wait_for_completion_task(task);
Trond Myklebustbe824162015-07-05 14:50:46 -04007640 if (!ret)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007641 ret = task->tk_status;
7642 rpc_put_task(task);
7643out:
7644 dprintk("<-- %s status=%d\n", __func__, ret);
7645 return ret;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007646}
7647
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007648struct nfs4_reclaim_complete_data {
7649 struct nfs_client *clp;
7650 struct nfs41_reclaim_complete_args arg;
7651 struct nfs41_reclaim_complete_res res;
7652};
7653
7654static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7655{
7656 struct nfs4_reclaim_complete_data *calldata = data;
7657
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007658 nfs41_setup_sequence(calldata->clp->cl_session,
7659 &calldata->arg.seq_args,
7660 &calldata->res.seq_res,
7661 task);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007662}
7663
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007664static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7665{
7666 switch(task->tk_status) {
7667 case 0:
7668 case -NFS4ERR_COMPLETE_ALREADY:
7669 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7670 break;
7671 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007672 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007673 /* fall through */
7674 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007675 return -EAGAIN;
7676 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007677 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007678 }
7679 return 0;
7680}
7681
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007682static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7683{
7684 struct nfs4_reclaim_complete_data *calldata = data;
7685 struct nfs_client *clp = calldata->clp;
7686 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7687
7688 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007689 if (!nfs41_sequence_done(task, res))
7690 return;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007691
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007692 trace_nfs4_reclaim_complete(clp, task->tk_status);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007693 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7694 rpc_restart_call_prepare(task);
7695 return;
7696 }
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007697 dprintk("<-- %s\n", __func__);
7698}
7699
7700static void nfs4_free_reclaim_complete_data(void *data)
7701{
7702 struct nfs4_reclaim_complete_data *calldata = data;
7703
7704 kfree(calldata);
7705}
7706
7707static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7708 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7709 .rpc_call_done = nfs4_reclaim_complete_done,
7710 .rpc_release = nfs4_free_reclaim_complete_data,
7711};
7712
7713/*
7714 * Issue a global reclaim complete.
7715 */
Trond Myklebust965e9c22013-05-20 11:05:17 -04007716static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7717 struct rpc_cred *cred)
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007718{
7719 struct nfs4_reclaim_complete_data *calldata;
7720 struct rpc_task *task;
7721 struct rpc_message msg = {
7722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
Trond Myklebust965e9c22013-05-20 11:05:17 -04007723 .rpc_cred = cred,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007724 };
7725 struct rpc_task_setup task_setup_data = {
7726 .rpc_client = clp->cl_rpcclient,
7727 .rpc_message = &msg,
7728 .callback_ops = &nfs4_reclaim_complete_call_ops,
7729 .flags = RPC_TASK_ASYNC,
7730 };
7731 int status = -ENOMEM;
7732
7733 dprintk("--> %s\n", __func__);
Trond Myklebust8535b2b2010-05-13 12:51:01 -04007734 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007735 if (calldata == NULL)
7736 goto out;
7737 calldata->clp = clp;
7738 calldata->arg.one_fs = 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007739
Chuck Levera9c92d62013-08-09 12:48:18 -04007740 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007741 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007742 msg.rpc_argp = &calldata->arg;
7743 msg.rpc_resp = &calldata->res;
7744 task_setup_data.callback_data = calldata;
7745 task = rpc_run_task(&task_setup_data);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007746 if (IS_ERR(task)) {
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007747 status = PTR_ERR(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007748 goto out;
7749 }
Andy Adamsonc34c32e2011-03-09 13:13:46 -05007750 status = nfs4_wait_for_completion_rpc_task(task);
7751 if (status == 0)
7752 status = task->tk_status;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007753 rpc_put_task(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007754 return 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007755out:
7756 dprintk("<-- %s status=%d\n", __func__, status);
7757 return status;
7758}
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007759
7760static void
7761nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7762{
7763 struct nfs4_layoutget *lgp = calldata;
Fred Isamanc31663d2011-01-06 11:36:24 +00007764 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007765 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007766
7767 dprintk("--> %s\n", __func__);
Fred Isamanc31663d2011-01-06 11:36:24 +00007768 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7769 * right now covering the LAYOUTGET we are about to send.
7770 * However, that is not so catastrophic, and there seems
7771 * to be no way to prevent it completely.
7772 */
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007773 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
Trond Myklebust9d12b212012-01-17 22:04:25 -05007774 &lgp->res.seq_res, task))
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007775 return;
Fred Isamancf7d63f2011-01-06 11:36:25 +00007776 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7777 NFS_I(lgp->args.inode)->layout,
Peng Taoce6ab4f2014-09-06 00:53:24 +08007778 &lgp->args.range,
Fred Isamancf7d63f2011-01-06 11:36:25 +00007779 lgp->args.ctx->state)) {
7780 rpc_exit(task, NFS4_OK);
Fred Isamancf7d63f2011-01-06 11:36:25 +00007781 }
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007782}
7783
7784static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7785{
7786 struct nfs4_layoutget *lgp = calldata;
Trond Myklebustee314c22012-10-01 17:25:48 -07007787 struct inode *inode = lgp->args.inode;
7788 struct nfs_server *server = NFS_SERVER(inode);
7789 struct pnfs_layout_hdr *lo;
7790 struct nfs4_state *state = NULL;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007791 unsigned long timeo, now, giveup;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007792
Boaz Harroshed7e5422014-01-22 20:34:54 +02007793 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007794
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007795 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
Trond Myklebustee314c22012-10-01 17:25:48 -07007796 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007797
7798 switch (task->tk_status) {
7799 case 0:
Trond Myklebustee314c22012-10-01 17:25:48 -07007800 goto out;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007801 /*
Trond Myklebust21b874c2015-08-31 01:19:22 -07007802 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7803 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7804 */
7805 case -NFS4ERR_BADLAYOUT:
7806 goto out_overflow;
7807 /*
Boaz Harroshed7e5422014-01-22 20:34:54 +02007808 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
Trond Myklebust21b874c2015-08-31 01:19:22 -07007809 * (or clients) writing to the same RAID stripe except when
7810 * the minlength argument is 0 (see RFC5661 section 18.43.3).
Boaz Harroshed7e5422014-01-22 20:34:54 +02007811 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007812 case -NFS4ERR_LAYOUTTRYLATER:
Trond Myklebust21b874c2015-08-31 01:19:22 -07007813 if (lgp->args.minlength == 0)
7814 goto out_overflow;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007815 /*
7816 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7817 * existing layout before getting a new one).
7818 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007819 case -NFS4ERR_RECALLCONFLICT:
Weston Andros Adamson30005122013-02-28 20:30:10 -05007820 timeo = rpc_get_timeout(task->tk_client);
7821 giveup = lgp->args.timestamp + timeo;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007822 now = jiffies;
7823 if (time_after(giveup, now)) {
7824 unsigned long delay;
7825
7826 /* Delay for:
7827 * - Not less then NFS4_POLL_RETRY_MIN.
7828 * - One last time a jiffie before we give up
7829 * - exponential backoff (time_now minus start_attempt)
7830 */
7831 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7832 min((giveup - now - 1),
7833 now - lgp->args.timestamp));
7834
7835 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7836 __func__, delay);
7837 rpc_delay(task, delay);
Trond Myklebust2259f962015-09-20 13:30:30 -04007838 /* Do not call nfs4_async_handle_error() */
7839 goto out_restart;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007840 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007841 break;
7842 case -NFS4ERR_EXPIRED:
7843 case -NFS4ERR_BAD_STATEID:
7844 spin_lock(&inode->i_lock);
Trond Myklebust2259f962015-09-20 13:30:30 -04007845 if (nfs4_stateid_match(&lgp->args.stateid,
7846 &lgp->args.ctx->state->stateid)) {
Trond Myklebustee314c22012-10-01 17:25:48 -07007847 spin_unlock(&inode->i_lock);
7848 /* If the open stateid was bad, then recover it. */
7849 state = lgp->args.ctx->state;
Trond Myklebust2259f962015-09-20 13:30:30 -04007850 break;
7851 }
7852 lo = NFS_I(inode)->layout;
7853 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7854 &lo->plh_stateid)) {
Trond Myklebustee314c22012-10-01 17:25:48 -07007855 LIST_HEAD(head);
7856
Christoph Hellwigdefb8462014-08-21 11:09:21 -05007857 /*
7858 * Mark the bad layout state as invalid, then retry
7859 * with the current stateid.
7860 */
Kinglong Mee8714d462015-09-20 23:04:22 +08007861 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
Trond Myklebustee314c22012-10-01 17:25:48 -07007862 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7863 spin_unlock(&inode->i_lock);
Trond Myklebustee314c22012-10-01 17:25:48 -07007864 pnfs_free_lseg_list(&head);
Trond Myklebust2259f962015-09-20 13:30:30 -04007865 } else
7866 spin_unlock(&inode->i_lock);
7867 goto out_restart;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007868 }
NeilBrown8478eaa2014-09-18 16:09:27 +10007869 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
Trond Myklebust2259f962015-09-20 13:30:30 -04007870 goto out_restart;
Trond Myklebustee314c22012-10-01 17:25:48 -07007871out:
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007872 dprintk("<-- %s\n", __func__);
Trond Myklebust21b874c2015-08-31 01:19:22 -07007873 return;
Trond Myklebust2259f962015-09-20 13:30:30 -04007874out_restart:
7875 task->tk_status = 0;
7876 rpc_restart_call_prepare(task);
7877 return;
Trond Myklebust21b874c2015-08-31 01:19:22 -07007878out_overflow:
7879 task->tk_status = -EOVERFLOW;
7880 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007881}
7882
Idan Kedar85541162012-08-02 11:47:10 +03007883static size_t max_response_pages(struct nfs_server *server)
7884{
7885 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7886 return nfs_page_array_len(0, max_resp_sz);
7887}
7888
7889static void nfs4_free_pages(struct page **pages, size_t size)
7890{
7891 int i;
7892
7893 if (!pages)
7894 return;
7895
7896 for (i = 0; i < size; i++) {
7897 if (!pages[i])
7898 break;
7899 __free_page(pages[i]);
7900 }
7901 kfree(pages);
7902}
7903
7904static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7905{
7906 struct page **pages;
7907 int i;
7908
7909 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7910 if (!pages) {
7911 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7912 return NULL;
7913 }
7914
7915 for (i = 0; i < size; i++) {
7916 pages[i] = alloc_page(gfp_flags);
7917 if (!pages[i]) {
7918 dprintk("%s: failed to allocate page\n", __func__);
7919 nfs4_free_pages(pages, size);
7920 return NULL;
7921 }
7922 }
7923
7924 return pages;
7925}
7926
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007927static void nfs4_layoutget_release(void *calldata)
7928{
7929 struct nfs4_layoutget *lgp = calldata;
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007930 struct inode *inode = lgp->args.inode;
7931 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007932 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007933
7934 dprintk("--> %s\n", __func__);
Idan Kedar85541162012-08-02 11:47:10 +03007935 nfs4_free_pages(lgp->args.layout.pages, max_pages);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007936 pnfs_put_layout_hdr(NFS_I(inode)->layout);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007937 put_nfs_open_context(lgp->args.ctx);
7938 kfree(calldata);
7939 dprintk("<-- %s\n", __func__);
7940}
7941
7942static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7943 .rpc_call_prepare = nfs4_layoutget_prepare,
7944 .rpc_call_done = nfs4_layoutget_done,
7945 .rpc_release = nfs4_layoutget_release,
7946};
7947
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007948struct pnfs_layout_segment *
7949nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007950{
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007951 struct inode *inode = lgp->args.inode;
7952 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007953 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007954 struct rpc_task *task;
7955 struct rpc_message msg = {
7956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7957 .rpc_argp = &lgp->args,
7958 .rpc_resp = &lgp->res,
Trond Myklebust6ab59342013-05-20 10:49:34 -04007959 .rpc_cred = lgp->cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007960 };
7961 struct rpc_task_setup task_setup_data = {
7962 .rpc_client = server->client,
7963 .rpc_message = &msg,
7964 .callback_ops = &nfs4_layoutget_call_ops,
7965 .callback_data = lgp,
7966 .flags = RPC_TASK_ASYNC,
7967 };
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007968 struct pnfs_layout_segment *lseg = NULL;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007969 int status = 0;
7970
7971 dprintk("--> %s\n", __func__);
7972
Peng Tao4bd5a982014-11-17 11:05:17 +08007973 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7974 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7975
Idan Kedar85541162012-08-02 11:47:10 +03007976 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7977 if (!lgp->args.layout.pages) {
7978 nfs4_layoutget_release(lgp);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007979 return ERR_PTR(-ENOMEM);
Idan Kedar85541162012-08-02 11:47:10 +03007980 }
7981 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
Weston Andros Adamson30005122013-02-28 20:30:10 -05007982 lgp->args.timestamp = jiffies;
Idan Kedar85541162012-08-02 11:47:10 +03007983
Weston Andros Adamson35124a02011-03-24 16:48:21 -04007984 lgp->res.layoutp = &lgp->args.layout;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007985 lgp->res.seq_res.sr_slot = NULL;
Chuck Levera9c92d62013-08-09 12:48:18 -04007986 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007987
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007988 task = rpc_run_task(&task_setup_data);
7989 if (IS_ERR(task))
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007990 return ERR_CAST(task);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007991 status = nfs4_wait_for_completion_rpc_task(task);
Fred Isamanc31663d2011-01-06 11:36:24 +00007992 if (status == 0)
7993 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007994 trace_nfs4_layoutget(lgp->args.ctx,
7995 &lgp->args.range,
7996 &lgp->res.range,
7997 status);
Weston Andros Adamson085b7a42013-02-15 16:03:46 -05007998 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7999 if (status == 0 && lgp->res.layoutp->len)
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008000 lseg = pnfs_layout_process(lgp);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008001 rpc_put_task(task);
8002 dprintk("<-- %s status=%d\n", __func__, status);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04008003 if (status)
8004 return ERR_PTR(status);
8005 return lseg;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008006}
8007
Benny Halevycbe82602011-05-22 19:52:37 +03008008static void
8009nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8010{
8011 struct nfs4_layoutreturn *lrp = calldata;
8012
8013 dprintk("--> %s\n", __func__);
Trond Myklebustd9afbd12012-10-22 20:28:44 -04008014 nfs41_setup_sequence(lrp->clp->cl_session,
8015 &lrp->args.seq_args,
8016 &lrp->res.seq_res,
8017 task);
Benny Halevycbe82602011-05-22 19:52:37 +03008018}
8019
8020static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8021{
8022 struct nfs4_layoutreturn *lrp = calldata;
8023 struct nfs_server *server;
8024
8025 dprintk("--> %s\n", __func__);
8026
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008027 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
Benny Halevycbe82602011-05-22 19:52:37 +03008028 return;
8029
8030 server = NFS_SERVER(lrp->args.inode);
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05008031 switch (task->tk_status) {
8032 default:
8033 task->tk_status = 0;
8034 case 0:
8035 break;
8036 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10008037 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05008038 break;
Trond Myklebustd00c5d42011-10-19 12:17:29 -07008039 rpc_restart_call_prepare(task);
Benny Halevycbe82602011-05-22 19:52:37 +03008040 return;
8041 }
Benny Halevycbe82602011-05-22 19:52:37 +03008042 dprintk("<-- %s\n", __func__);
8043}
8044
8045static void nfs4_layoutreturn_release(void *calldata)
8046{
8047 struct nfs4_layoutreturn *lrp = calldata;
Trond Myklebust849b2862012-09-24 14:18:39 -04008048 struct pnfs_layout_hdr *lo = lrp->args.layout;
Trond Myklebustc5d73712015-07-09 17:58:39 +02008049 LIST_HEAD(freeme);
Benny Halevycbe82602011-05-22 19:52:37 +03008050
8051 dprintk("--> %s\n", __func__);
Trond Myklebust849b2862012-09-24 14:18:39 -04008052 spin_lock(&lo->plh_inode->i_lock);
8053 if (lrp->res.lrs_present)
8054 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
Trond Myklebustc5d73712015-07-09 17:58:39 +02008055 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
Tom Haynesd67ae822014-12-11 17:02:04 -05008056 pnfs_clear_layoutreturn_waitbit(lo);
Trond Myklebust849b2862012-09-24 14:18:39 -04008057 lo->plh_block_lgets--;
8058 spin_unlock(&lo->plh_inode->i_lock);
Trond Myklebustc5d73712015-07-09 17:58:39 +02008059 pnfs_free_lseg_list(&freeme);
Trond Myklebust70c3bd22012-09-18 20:51:13 -04008060 pnfs_put_layout_hdr(lrp->args.layout);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008061 nfs_iput_and_deactive(lrp->inode);
Benny Halevycbe82602011-05-22 19:52:37 +03008062 kfree(calldata);
8063 dprintk("<-- %s\n", __func__);
8064}
8065
8066static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8067 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8068 .rpc_call_done = nfs4_layoutreturn_done,
8069 .rpc_release = nfs4_layoutreturn_release,
8070};
8071
Peng Tao6c166052014-11-17 09:30:40 +08008072int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
Benny Halevycbe82602011-05-22 19:52:37 +03008073{
8074 struct rpc_task *task;
8075 struct rpc_message msg = {
8076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8077 .rpc_argp = &lrp->args,
8078 .rpc_resp = &lrp->res,
Trond Myklebust95560002013-05-20 10:43:47 -04008079 .rpc_cred = lrp->cred,
Benny Halevycbe82602011-05-22 19:52:37 +03008080 };
8081 struct rpc_task_setup task_setup_data = {
Andy Adamson1771c572013-07-22 12:42:05 -04008082 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
Benny Halevycbe82602011-05-22 19:52:37 +03008083 .rpc_message = &msg,
8084 .callback_ops = &nfs4_layoutreturn_call_ops,
8085 .callback_data = lrp,
8086 };
Peng Tao6c166052014-11-17 09:30:40 +08008087 int status = 0;
Benny Halevycbe82602011-05-22 19:52:37 +03008088
8089 dprintk("--> %s\n", __func__);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008090 if (!sync) {
8091 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8092 if (!lrp->inode) {
8093 nfs4_layoutreturn_release(lrp);
8094 return -EAGAIN;
8095 }
8096 task_setup_data.flags |= RPC_TASK_ASYNC;
8097 }
Chuck Levera9c92d62013-08-09 12:48:18 -04008098 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
Benny Halevycbe82602011-05-22 19:52:37 +03008099 task = rpc_run_task(&task_setup_data);
8100 if (IS_ERR(task))
8101 return PTR_ERR(task);
Trond Myklebust5a0ec8ac2015-02-05 16:35:16 -05008102 if (sync)
8103 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04008104 trace_nfs4_layoutreturn(lrp->args.inode, status);
Benny Halevycbe82602011-05-22 19:52:37 +03008105 dprintk("<-- %s status=%d\n", __func__, status);
8106 rpc_put_task(task);
8107 return status;
8108}
8109
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008110static int
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008111_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8112 struct pnfs_device *pdev,
8113 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008114{
8115 struct nfs4_getdeviceinfo_args args = {
8116 .pdev = pdev,
Trond Myklebust4e590802015-03-09 14:01:25 -04008117 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8118 NOTIFY_DEVICEID4_DELETE,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008119 };
8120 struct nfs4_getdeviceinfo_res res = {
8121 .pdev = pdev,
8122 };
8123 struct rpc_message msg = {
8124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8125 .rpc_argp = &args,
8126 .rpc_resp = &res,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008127 .rpc_cred = cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008128 };
8129 int status;
8130
8131 dprintk("--> %s\n", __func__);
Bryan Schumaker7c513052011-03-24 17:12:24 +00008132 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Trond Myklebust4e590802015-03-09 14:01:25 -04008133 if (res.notification & ~args.notify_types)
8134 dprintk("%s: unsupported notification\n", __func__);
Trond Myklebustdf526992015-03-09 14:48:32 -04008135 if (res.notification != args.notify_types)
8136 pdev->nocache = 1;
Trond Myklebust4e590802015-03-09 14:01:25 -04008137
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008138 dprintk("<-- %s status=%d\n", __func__, status);
8139
8140 return status;
8141}
8142
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008143int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8144 struct pnfs_device *pdev,
8145 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008146{
8147 struct nfs4_exception exception = { };
8148 int err;
8149
8150 do {
8151 err = nfs4_handle_exception(server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04008152 _nfs4_proc_getdeviceinfo(server, pdev, cred),
Andy Adamsonb1f69b72010-10-20 00:18:03 -04008153 &exception);
8154 } while (exception.retry);
8155 return err;
8156}
8157EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8158
Andy Adamson863a3c62011-03-23 13:27:54 +00008159static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8160{
8161 struct nfs4_layoutcommit_data *data = calldata;
8162 struct nfs_server *server = NFS_SERVER(data->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008163 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamson863a3c62011-03-23 13:27:54 +00008164
Trond Myklebustd9afbd12012-10-22 20:28:44 -04008165 nfs41_setup_sequence(session,
8166 &data->args.seq_args,
8167 &data->res.seq_res,
8168 task);
Andy Adamson863a3c62011-03-23 13:27:54 +00008169}
8170
8171static void
8172nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8173{
8174 struct nfs4_layoutcommit_data *data = calldata;
8175 struct nfs_server *server = NFS_SERVER(data->args.inode);
8176
Trond Myklebust6ba7db32012-10-22 20:07:20 -04008177 if (!nfs41_sequence_done(task, &data->res.seq_res))
Andy Adamson863a3c62011-03-23 13:27:54 +00008178 return;
8179
8180 switch (task->tk_status) { /* Just ignore these failures */
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008181 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8182 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8183 case -NFS4ERR_BADLAYOUT: /* no layout */
8184 case -NFS4ERR_GRACE: /* loca_recalim always false */
Andy Adamson863a3c62011-03-23 13:27:54 +00008185 task->tk_status = 0;
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008186 case 0:
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008187 break;
8188 default:
NeilBrown8478eaa2014-09-18 16:09:27 +10008189 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
Trond Myklebuste59d27e2012-03-27 18:22:19 -04008190 rpc_restart_call_prepare(task);
8191 return;
8192 }
8193 }
Andy Adamson863a3c62011-03-23 13:27:54 +00008194}
8195
8196static void nfs4_layoutcommit_release(void *calldata)
8197{
8198 struct nfs4_layoutcommit_data *data = calldata;
8199
Andy Adamsondb29c082011-07-30 20:52:38 -04008200 pnfs_cleanup_layoutcommit(data);
Trond Myklebustd8c951c2014-01-13 12:08:11 -05008201 nfs_post_op_update_inode_force_wcc(data->args.inode,
8202 data->res.fattr);
Andy Adamson863a3c62011-03-23 13:27:54 +00008203 put_rpccred(data->cred);
Trond Myklebust472e2592015-02-05 16:50:30 -05008204 nfs_iput_and_deactive(data->inode);
Andy Adamson863a3c62011-03-23 13:27:54 +00008205 kfree(data);
8206}
8207
8208static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8209 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8210 .rpc_call_done = nfs4_layoutcommit_done,
8211 .rpc_release = nfs4_layoutcommit_release,
8212};
8213
8214int
Andy Adamsonef311532011-03-12 02:58:10 -05008215nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +00008216{
8217 struct rpc_message msg = {
8218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8219 .rpc_argp = &data->args,
8220 .rpc_resp = &data->res,
8221 .rpc_cred = data->cred,
8222 };
8223 struct rpc_task_setup task_setup_data = {
8224 .task = &data->task,
8225 .rpc_client = NFS_CLIENT(data->args.inode),
8226 .rpc_message = &msg,
8227 .callback_ops = &nfs4_layoutcommit_ops,
8228 .callback_data = data,
Andy Adamson863a3c62011-03-23 13:27:54 +00008229 };
8230 struct rpc_task *task;
8231 int status = 0;
8232
Kinglong Meeb4839eb2015-07-01 12:00:13 +08008233 dprintk("NFS: initiating layoutcommit call. sync %d "
8234 "lbw: %llu inode %lu\n", sync,
Andy Adamson863a3c62011-03-23 13:27:54 +00008235 data->args.lastbytewritten,
8236 data->args.inode->i_ino);
8237
Trond Myklebust472e2592015-02-05 16:50:30 -05008238 if (!sync) {
8239 data->inode = nfs_igrab_and_active(data->args.inode);
8240 if (data->inode == NULL) {
8241 nfs4_layoutcommit_release(data);
8242 return -EAGAIN;
8243 }
8244 task_setup_data.flags = RPC_TASK_ASYNC;
8245 }
Chuck Levera9c92d62013-08-09 12:48:18 -04008246 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Andy Adamson863a3c62011-03-23 13:27:54 +00008247 task = rpc_run_task(&task_setup_data);
8248 if (IS_ERR(task))
8249 return PTR_ERR(task);
Trond Myklebust472e2592015-02-05 16:50:30 -05008250 if (sync)
8251 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04008252 trace_nfs4_layoutcommit(data->args.inode, status);
Andy Adamson863a3c62011-03-23 13:27:54 +00008253 dprintk("%s: status %d\n", __func__, status);
8254 rpc_put_task(task);
8255 return status;
8256}
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008257
Andy Adamson97431202013-08-08 10:57:56 -04008258/**
8259 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8260 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8261 */
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008262static int
8263_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008264 struct nfs_fsinfo *info,
8265 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008266{
8267 struct nfs41_secinfo_no_name_args args = {
8268 .style = SECINFO_STYLE_CURRENT_FH,
8269 };
8270 struct nfs4_secinfo_res res = {
8271 .flavors = flavors,
8272 };
8273 struct rpc_message msg = {
8274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8275 .rpc_argp = &args,
8276 .rpc_resp = &res,
8277 };
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008278 struct rpc_clnt *clnt = server->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008279 struct rpc_cred *cred = NULL;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008280 int status;
8281
8282 if (use_integrity) {
8283 clnt = server->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008284 cred = nfs4_get_clid_cred(server->nfs_client);
8285 msg.rpc_cred = cred;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008286 }
8287
8288 dprintk("--> %s\n", __func__);
8289 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8290 &res.seq_res, 0);
8291 dprintk("<-- %s status=%d\n", __func__, status);
8292
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008293 if (cred)
8294 put_rpccred(cred);
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008295
8296 return status;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008297}
8298
8299static int
8300nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8301 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8302{
8303 struct nfs4_exception exception = { };
8304 int err;
8305 do {
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008306 /* first try using integrity protection */
8307 err = -NFS4ERR_WRONGSEC;
8308
8309 /* try to use integrity protection with machine cred */
8310 if (_nfs4_is_integrity_protected(server->nfs_client))
8311 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8312 flavors, true);
8313
8314 /*
8315 * if unable to use integrity protection, or SECINFO with
8316 * integrity protection returns NFS4ERR_WRONGSEC (which is
8317 * disallowed by spec, but exists in deployed servers) use
8318 * the current filesystem's rpc_client and the user cred.
8319 */
8320 if (err == -NFS4ERR_WRONGSEC)
8321 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8322 flavors, false);
8323
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008324 switch (err) {
8325 case 0:
8326 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008327 case -ENOTSUPP:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008328 goto out;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008329 default:
8330 err = nfs4_handle_exception(server, err, &exception);
8331 }
8332 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008333out:
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008334 return err;
8335}
8336
8337static int
8338nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8339 struct nfs_fsinfo *info)
8340{
8341 int err;
8342 struct page *page;
Anna Schumaker367156d2013-09-25 17:02:48 -04008343 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008344 struct nfs4_secinfo_flavors *flavors;
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008345 struct nfs4_secinfo4 *secinfo;
8346 int i;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008347
8348 page = alloc_page(GFP_KERNEL);
8349 if (!page) {
8350 err = -ENOMEM;
8351 goto out;
8352 }
8353
8354 flavors = page_address(page);
8355 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8356
8357 /*
8358 * Fall back on "guess and check" method if
8359 * the server doesn't support SECINFO_NO_NAME
8360 */
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008361 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008362 err = nfs4_find_root_sec(server, fhandle, info);
8363 goto out_freepage;
8364 }
8365 if (err)
8366 goto out_freepage;
8367
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008368 for (i = 0; i < flavors->num_flavors; i++) {
8369 secinfo = &flavors->flavors[i];
8370
8371 switch (secinfo->flavor) {
8372 case RPC_AUTH_NULL:
8373 case RPC_AUTH_UNIX:
8374 case RPC_AUTH_GSS:
8375 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8376 &secinfo->flavor_info);
8377 break;
8378 default:
8379 flavor = RPC_AUTH_MAXFLAVOR;
8380 break;
8381 }
8382
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04008383 if (!nfs_auth_info_match(&server->auth_info, flavor))
8384 flavor = RPC_AUTH_MAXFLAVOR;
8385
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008386 if (flavor != RPC_AUTH_MAXFLAVOR) {
8387 err = nfs4_lookup_root_sec(server, fhandle,
8388 info, flavor);
8389 if (!err)
8390 break;
8391 }
8392 }
8393
8394 if (flavor == RPC_AUTH_MAXFLAVOR)
8395 err = -EPERM;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008396
8397out_freepage:
8398 put_page(page);
8399 if (err == -EACCES)
8400 return -EPERM;
8401out:
8402 return err;
8403}
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008404
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008405static int _nfs41_test_stateid(struct nfs_server *server,
8406 nfs4_stateid *stateid,
8407 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008408{
8409 int status;
8410 struct nfs41_test_stateid_args args = {
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008411 .stateid = stateid,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008412 };
8413 struct nfs41_test_stateid_res res;
8414 struct rpc_message msg = {
8415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8416 .rpc_argp = &args,
8417 .rpc_resp = &res,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008418 .rpc_cred = cred,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008419 };
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008420 struct rpc_clnt *rpc_client = server->client;
8421
8422 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8423 &rpc_client, &msg);
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008424
Chuck Lever38527b12012-07-11 16:30:23 -04008425 dprintk("NFS call test_stateid %p\n", stateid);
Chuck Levera9c92d62013-08-09 12:48:18 -04008426 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008427 nfs4_set_sequence_privileged(&args.seq_args);
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008428 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008429 &args.seq_args, &res.seq_res);
Chuck Lever38527b12012-07-11 16:30:23 -04008430 if (status != NFS_OK) {
8431 dprintk("NFS reply test_stateid: failed, %d\n", status);
Chuck Lever377e5072012-07-11 16:29:45 -04008432 return status;
Chuck Lever38527b12012-07-11 16:30:23 -04008433 }
8434 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
Chuck Lever377e5072012-07-11 16:29:45 -04008435 return -res.status;
Bryan Schumaker7d974792011-06-02 14:59:08 -04008436}
8437
Chuck Lever38527b12012-07-11 16:30:23 -04008438/**
8439 * nfs41_test_stateid - perform a TEST_STATEID operation
8440 *
8441 * @server: server / transport on which to perform the operation
8442 * @stateid: state ID to test
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008443 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008444 *
8445 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8446 * Otherwise a negative NFS4ERR value is returned if the operation
8447 * failed or the state ID is not currently valid.
8448 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008449static int nfs41_test_stateid(struct nfs_server *server,
8450 nfs4_stateid *stateid,
8451 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008452{
8453 struct nfs4_exception exception = { };
8454 int err;
8455 do {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008456 err = _nfs41_test_stateid(server, stateid, cred);
Chuck Lever377e5072012-07-11 16:29:45 -04008457 if (err != -NFS4ERR_DELAY)
8458 break;
8459 nfs4_handle_exception(server, err, &exception);
Bryan Schumaker7d974792011-06-02 14:59:08 -04008460 } while (exception.retry);
8461 return err;
8462}
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008463
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008464struct nfs_free_stateid_data {
8465 struct nfs_server *server;
8466 struct nfs41_free_stateid_args args;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008467 struct nfs41_free_stateid_res res;
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008468};
8469
8470static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8471{
8472 struct nfs_free_stateid_data *data = calldata;
8473 nfs41_setup_sequence(nfs4_get_session(data->server),
8474 &data->args.seq_args,
8475 &data->res.seq_res,
8476 task);
8477}
8478
8479static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8480{
8481 struct nfs_free_stateid_data *data = calldata;
8482
8483 nfs41_sequence_done(task, &data->res.seq_res);
8484
8485 switch (task->tk_status) {
8486 case -NFS4ERR_DELAY:
NeilBrown8478eaa2014-09-18 16:09:27 +10008487 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008488 rpc_restart_call_prepare(task);
8489 }
8490}
8491
8492static void nfs41_free_stateid_release(void *calldata)
8493{
8494 kfree(calldata);
8495}
8496
Trond Myklebust17f26b12013-08-21 15:48:42 -04008497static const struct rpc_call_ops nfs41_free_stateid_ops = {
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008498 .rpc_call_prepare = nfs41_free_stateid_prepare,
8499 .rpc_call_done = nfs41_free_stateid_done,
8500 .rpc_release = nfs41_free_stateid_release,
8501};
8502
8503static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8504 nfs4_stateid *stateid,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008505 struct rpc_cred *cred,
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008506 bool privileged)
8507{
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008508 struct rpc_message msg = {
8509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008510 .rpc_cred = cred,
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008511 };
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008512 struct rpc_task_setup task_setup = {
8513 .rpc_client = server->client,
8514 .rpc_message = &msg,
8515 .callback_ops = &nfs41_free_stateid_ops,
8516 .flags = RPC_TASK_ASYNC,
8517 };
8518 struct nfs_free_stateid_data *data;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008519
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008520 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8521 &task_setup.rpc_client, &msg);
8522
Chuck Lever38527b12012-07-11 16:30:23 -04008523 dprintk("NFS call free_stateid %p\n", stateid);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008524 data = kmalloc(sizeof(*data), GFP_NOFS);
8525 if (!data)
8526 return ERR_PTR(-ENOMEM);
8527 data->server = server;
8528 nfs4_stateid_copy(&data->args.stateid, stateid);
8529
8530 task_setup.callback_data = data;
8531
8532 msg.rpc_argp = &data->args;
8533 msg.rpc_resp = &data->res;
Chuck Levera9c92d62013-08-09 12:48:18 -04008534 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008535 if (privileged)
8536 nfs4_set_sequence_privileged(&data->args.seq_args);
8537
8538 return rpc_run_task(&task_setup);
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008539}
8540
Chuck Lever38527b12012-07-11 16:30:23 -04008541/**
8542 * nfs41_free_stateid - perform a FREE_STATEID operation
8543 *
8544 * @server: server / transport on which to perform the operation
8545 * @stateid: state ID to release
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008546 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008547 *
8548 * Returns NFS_OK if the server freed "stateid". Otherwise a
8549 * negative NFS4ERR value is returned.
8550 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008551static int nfs41_free_stateid(struct nfs_server *server,
8552 nfs4_stateid *stateid,
8553 struct rpc_cred *cred)
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008554{
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008555 struct rpc_task *task;
8556 int ret;
8557
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008558 task = _nfs41_free_stateid(server, stateid, cred, true);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008559 if (IS_ERR(task))
8560 return PTR_ERR(task);
8561 ret = rpc_wait_for_completion_task(task);
8562 if (!ret)
8563 ret = task->tk_status;
8564 rpc_put_task(task);
8565 return ret;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008566}
Trond Myklebust36281ca2012-03-04 18:13:56 -05008567
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008568static void
8569nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008570{
8571 struct rpc_task *task;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008572 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008573
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008574 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008575 nfs4_free_lock_state(server, lsp);
8576 if (IS_ERR(task))
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008577 return;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008578 rpc_put_task(task);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008579}
8580
Trond Myklebust36281ca2012-03-04 18:13:56 -05008581static bool nfs41_match_stateid(const nfs4_stateid *s1,
8582 const nfs4_stateid *s2)
8583{
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008584 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008585 return false;
8586
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008587 if (s1->seqid == s2->seqid)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008588 return true;
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008589 if (s1->seqid == 0 || s2->seqid == 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008590 return true;
8591
8592 return false;
8593}
8594
Andy Adamson557134a2009-04-01 09:21:53 -04008595#endif /* CONFIG_NFS_V4_1 */
8596
Trond Myklebust36281ca2012-03-04 18:13:56 -05008597static bool nfs4_match_stateid(const nfs4_stateid *s1,
8598 const nfs4_stateid *s2)
8599{
Trond Myklebustf597c532012-03-04 18:13:56 -05008600 return nfs4_stateid_match(s1, s2);
Trond Myklebust36281ca2012-03-04 18:13:56 -05008601}
8602
8603
Trond Myklebust17280172012-03-11 13:11:00 -04008604static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008605 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008606 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008607 .recover_open = nfs4_open_reclaim,
8608 .recover_lock = nfs4_lock_reclaim,
Andy Adamson591d71c2009-04-01 09:22:47 -04008609 .establish_clid = nfs4_init_clientid,
Chuck Lever05f4c352012-09-14 17:24:32 -04008610 .detect_trunking = nfs40_discover_server_trunking,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008611};
8612
Andy Adamson591d71c2009-04-01 09:22:47 -04008613#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008614static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008615 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8616 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8617 .recover_open = nfs4_open_reclaim,
8618 .recover_lock = nfs4_lock_reclaim,
Andy Adamson4d643d12009-12-04 15:52:24 -05008619 .establish_clid = nfs41_init_clientid,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05008620 .reclaim_complete = nfs41_proc_reclaim_complete,
Chuck Lever05f4c352012-09-14 17:24:32 -04008621 .detect_trunking = nfs41_discover_server_trunking,
Andy Adamson591d71c2009-04-01 09:22:47 -04008622};
8623#endif /* CONFIG_NFS_V4_1 */
8624
Trond Myklebust17280172012-03-11 13:11:00 -04008625static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008626 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008627 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Trond Myklebust4dfd4f72014-10-17 15:10:25 +03008628 .recover_open = nfs40_open_expired,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008629 .recover_lock = nfs4_lock_expired,
Andy Adamson591d71c2009-04-01 09:22:47 -04008630 .establish_clid = nfs4_init_clientid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008631};
8632
Andy Adamson591d71c2009-04-01 09:22:47 -04008633#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008634static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008635 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8636 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Bryan Schumakerf062eb62011-06-02 14:59:10 -04008637 .recover_open = nfs41_open_expired,
8638 .recover_lock = nfs41_lock_expired,
Andy Adamson4d643d12009-12-04 15:52:24 -05008639 .establish_clid = nfs41_init_clientid,
Andy Adamson591d71c2009-04-01 09:22:47 -04008640};
8641#endif /* CONFIG_NFS_V4_1 */
8642
Trond Myklebust17280172012-03-11 13:11:00 -04008643static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008644 .sched_state_renewal = nfs4_proc_async_renew,
Andy Adamsona7b72102009-04-01 09:22:46 -04008645 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008646 .renew_lease = nfs4_proc_renew,
Benny Halevy29fba382009-04-01 09:22:44 -04008647};
8648
8649#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008650static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008651 .sched_state_renewal = nfs41_proc_async_sequence,
Andy Adamsona7b72102009-04-01 09:22:46 -04008652 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008653 .renew_lease = nfs4_proc_sequence,
Benny Halevy29fba382009-04-01 09:22:44 -04008654};
8655#endif
8656
Chuck Leverec011fe2013-10-17 14:12:39 -04008657static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008658 .get_locations = _nfs40_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008659 .fsid_present = _nfs40_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008660};
8661
8662#if defined(CONFIG_NFS_V4_1)
8663static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008664 .get_locations = _nfs41_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008665 .fsid_present = _nfs41_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008666};
8667#endif /* CONFIG_NFS_V4_1 */
8668
Trond Myklebust97dc1352010-06-16 09:52:26 -04008669static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8670 .minor_version = 0,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008671 .init_caps = NFS_CAP_READDIRPLUS
8672 | NFS_CAP_ATOMIC_OPEN
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008673 | NFS_CAP_POSIX_LOCK,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008674 .init_client = nfs40_init_client,
8675 .shutdown_client = nfs40_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008676 .match_stateid = nfs4_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008677 .find_root_sec = nfs4_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008678 .free_lock_state = nfs4_release_lockowner,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008679 .alloc_seqid = nfs_alloc_seqid,
Chuck Lever9915ea72013-08-09 12:48:27 -04008680 .call_sync_ops = &nfs40_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008681 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8682 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8683 .state_renewal_ops = &nfs40_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008684 .mig_recovery_ops = &nfs40_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008685};
8686
8687#if defined(CONFIG_NFS_V4_1)
Trond Myklebust63f5f792015-01-23 19:19:25 -05008688static struct nfs_seqid *
8689nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8690{
8691 return NULL;
8692}
8693
Trond Myklebust97dc1352010-06-16 09:52:26 -04008694static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8695 .minor_version = 1,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008696 .init_caps = NFS_CAP_READDIRPLUS
8697 | NFS_CAP_ATOMIC_OPEN
Trond Myklebust3b664862013-03-17 15:31:15 -04008698 | NFS_CAP_POSIX_LOCK
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04008699 | NFS_CAP_STATEID_NFSV41
Anna Schumakere9831202014-10-22 15:53:10 -04008700 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008701 .init_client = nfs41_init_client,
8702 .shutdown_client = nfs41_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008703 .match_stateid = nfs41_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008704 .find_root_sec = nfs41_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008705 .free_lock_state = nfs41_free_lock_state,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008706 .alloc_seqid = nfs_alloc_no_seqid,
Chuck Lever9915ea72013-08-09 12:48:27 -04008707 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008708 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8709 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8710 .state_renewal_ops = &nfs41_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008711 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008712};
8713#endif
8714
Steve Dickson42c2c422013-05-22 12:50:38 -04008715#if defined(CONFIG_NFS_V4_2)
8716static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8717 .minor_version = 2,
Bryan Schumaker70173102013-06-19 13:41:43 -04008718 .init_caps = NFS_CAP_READDIRPLUS
8719 | NFS_CAP_ATOMIC_OPEN
Bryan Schumaker70173102013-06-19 13:41:43 -04008720 | NFS_CAP_POSIX_LOCK
8721 | NFS_CAP_STATEID_NFSV41
Anna Schumakere9831202014-10-22 15:53:10 -04008722 | NFS_CAP_ATOMIC_OPEN_V1
Anna Schumakerf4ac1672014-11-25 13:18:15 -05008723 | NFS_CAP_ALLOCATE
Anna Schumaker624bd5b2014-11-25 13:18:16 -05008724 | NFS_CAP_DEALLOCATE
Trond Myklebust6c5a0d82015-06-27 11:45:46 -04008725 | NFS_CAP_SEEK
Peng Taoe5341f32015-09-26 02:24:35 +08008726 | NFS_CAP_LAYOUTSTATS
8727 | NFS_CAP_CLONE,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008728 .init_client = nfs41_init_client,
8729 .shutdown_client = nfs41_shutdown_client,
Steve Dickson42c2c422013-05-22 12:50:38 -04008730 .match_stateid = nfs41_match_stateid,
8731 .find_root_sec = nfs41_find_root_sec,
Bryan Schumaker70173102013-06-19 13:41:43 -04008732 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008733 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebust63f5f792015-01-23 19:19:25 -05008734 .alloc_seqid = nfs_alloc_no_seqid,
Steve Dickson42c2c422013-05-22 12:50:38 -04008735 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8736 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8737 .state_renewal_ops = &nfs41_state_renewal_ops,
Kinglong Mee18e3b732015-08-15 21:52:10 +08008738 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Steve Dickson42c2c422013-05-22 12:50:38 -04008739};
8740#endif
8741
Trond Myklebust97dc1352010-06-16 09:52:26 -04008742const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8743 [0] = &nfs_v4_0_minor_ops,
8744#if defined(CONFIG_NFS_V4_1)
8745 [1] = &nfs_v4_1_minor_ops,
8746#endif
Steve Dickson42c2c422013-05-22 12:50:38 -04008747#if defined(CONFIG_NFS_V4_2)
8748 [2] = &nfs_v4_2_minor_ops,
8749#endif
Trond Myklebust97dc1352010-06-16 09:52:26 -04008750};
8751
Trond Myklebust17f26b12013-08-21 15:48:42 -04008752static const struct inode_operations nfs4_dir_inode_operations = {
Bryan Schumaker73a79702012-07-16 16:39:12 -04008753 .create = nfs_create,
8754 .lookup = nfs_lookup,
8755 .atomic_open = nfs_atomic_open,
8756 .link = nfs_link,
8757 .unlink = nfs_unlink,
8758 .symlink = nfs_symlink,
8759 .mkdir = nfs_mkdir,
8760 .rmdir = nfs_rmdir,
8761 .mknod = nfs_mknod,
8762 .rename = nfs_rename,
8763 .permission = nfs_permission,
8764 .getattr = nfs_getattr,
8765 .setattr = nfs_setattr,
8766 .getxattr = generic_getxattr,
8767 .setxattr = generic_setxattr,
8768 .listxattr = generic_listxattr,
8769 .removexattr = generic_removexattr,
8770};
8771
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08008772static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008773 .permission = nfs_permission,
8774 .getattr = nfs_getattr,
8775 .setattr = nfs_setattr,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008776 .getxattr = generic_getxattr,
8777 .setxattr = generic_setxattr,
8778 .listxattr = generic_listxattr,
8779 .removexattr = generic_removexattr,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008780};
8781
David Howells509de812006-08-22 20:06:11 -04008782const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07008783 .version = 4, /* protocol version */
8784 .dentry_ops = &nfs4_dentry_operations,
8785 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008786 .file_inode_ops = &nfs4_file_inode_operations,
Jeff Layton1788ea62011-11-04 13:31:21 -04008787 .file_ops = &nfs4_file_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008788 .getroot = nfs4_proc_get_root,
Bryan Schumaker281cad42012-04-27 13:27:45 -04008789 .submount = nfs4_submount,
Bryan Schumakerff9099f22012-07-30 16:05:18 -04008790 .try_mount = nfs4_try_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008791 .getattr = nfs4_proc_getattr,
8792 .setattr = nfs4_proc_setattr,
8793 .lookup = nfs4_proc_lookup,
8794 .access = nfs4_proc_access,
8795 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008796 .create = nfs4_proc_create,
8797 .remove = nfs4_proc_remove,
8798 .unlink_setup = nfs4_proc_unlink_setup,
Bryan Schumaker34e137c2012-03-19 14:54:41 -04008799 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008800 .unlink_done = nfs4_proc_unlink_done,
Jeff Laytond3d41522010-09-17 17:31:57 -04008801 .rename_setup = nfs4_proc_rename_setup,
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04008802 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
Jeff Laytond3d41522010-09-17 17:31:57 -04008803 .rename_done = nfs4_proc_rename_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008804 .link = nfs4_proc_link,
8805 .symlink = nfs4_proc_symlink,
8806 .mkdir = nfs4_proc_mkdir,
8807 .rmdir = nfs4_proc_remove,
8808 .readdir = nfs4_proc_readdir,
8809 .mknod = nfs4_proc_mknod,
8810 .statfs = nfs4_proc_statfs,
8811 .fsinfo = nfs4_proc_fsinfo,
8812 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04008813 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008814 .decode_dirent = nfs4_decode_dirent,
Anna Schumakera4cdda52014-05-06 09:12:31 -04008815 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008816 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05008817 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008818 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008819 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008820 .commit_setup = nfs4_proc_commit_setup,
Fred Isaman0b7c0152012-04-20 14:47:39 -04008821 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008822 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008823 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00008824 .clear_acl_cache = nfs4_zap_acl_attr,
Trond Myklebust7fe5c392009-03-19 15:35:50 -04008825 .close_context = nfs4_close_context,
Trond Myklebust2b484292010-09-17 10:56:51 -04008826 .open_context = nfs4_atomic_open,
Bryan Schumaker011e2a72012-06-20 15:53:43 -04008827 .have_delegation = nfs4_have_delegation,
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04008828 .return_delegation = nfs4_inode_return_delegation,
Bryan Schumaker6663ee72012-06-20 15:53:46 -04008829 .alloc_client = nfs4_alloc_client,
Andy Adamson45a52a02011-03-01 01:34:08 +00008830 .init_client = nfs4_init_client,
Bryan Schumakercdb7ece2012-06-20 15:53:45 -04008831 .free_client = nfs4_free_client,
Bryan Schumaker1179acc2012-07-30 16:05:19 -04008832 .create_server = nfs4_create_server,
8833 .clone_server = nfs_clone_server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008834};
8835
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008836static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8837 .prefix = XATTR_NAME_NFSV4_ACL,
8838 .list = nfs4_xattr_list_nfs4_acl,
8839 .get = nfs4_xattr_get_nfs4_acl,
8840 .set = nfs4_xattr_set_nfs4_acl,
8841};
8842
8843const struct xattr_handler *nfs4_xattr_handlers[] = {
8844 &nfs4_xattr_nfs4_acl_handler,
David Quigleyc9bccef2013-05-22 12:50:45 -04008845#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8846 &nfs4_xattr_nfs4_label_handler,
8847#endif
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008848 NULL
8849};
8850
Linus Torvalds1da177e2005-04-16 15:20:36 -07008851/*
8852 * Local variables:
8853 * c-basic-offset: 8
8854 * End:
8855 */