blob: 75ae8d22f067d55b7edfe77bbb44d2b0067880f8 [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>
41#include <linux/string.h>
Trond Myklebust652f89f2011-12-09 19:05:58 -050042#include <linux/ratelimit.h>
43#include <linux/printk.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090044#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
Bryan Schumaker9b7160c2011-04-13 14:31:30 -040050#include <linux/nfs_mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/namei.h>
Trond Myklebust02a913a2005-10-18 14:20:17 -070052#include <linux/mount.h>
Benny Halevy99fe60d2009-04-01 09:22:29 -040053#include <linux/module.h>
Trond Myklebust6926afd2012-01-07 13:22:46 -050054#include <linux/nfs_idmap.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"
Trond Myklebust73e39aa2012-11-26 12:49:34 -050066#include "nfs4session.h"
David Howellsde242c02012-12-20 21:52:38 +000067#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Trond Myklebustc6d01c62013-08-09 11:51:26 -040069#include "nfs4trace.h"
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#define NFSDBG_FACILITY NFSDBG_PROC
72
Trond Myklebust2066fe82006-09-15 08:30:46 -040073#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#define NFS4_POLL_RETRY_MAX (15*HZ)
75
Trond Myklebustcdd4e682006-01-03 09:55:12 +010076struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010077static int _nfs4_proc_open(struct nfs4_opendata *data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -080078static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Trond Myklebust9e33bed2008-12-23 15:21:46 -050080static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
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;
Weston Andros Adamson6168f622012-09-10 14:00:46 -0400161 case -NFS4ERR_ACCESS:
162 return -EACCES;
Trond Myklebust6e3cf242013-03-23 15:22:45 -0400163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
Trond Myklebust52567b02009-10-23 14:46:42 -0400165 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 dprintk("%s could not handle NFSv4 error %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700167 __func__, -err);
Trond Myklebust52567b02009-10-23 14:46:42 -0400168 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 }
Trond Myklebust52567b02009-10-23 14:46:42 -0400170 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
Trond Myklebust1549210f2012-06-05 09:16:47 -0400176const u32 nfs4_fattr_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
David Quigleyaa9c2662013-05-22 12:50:44 -0400190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194};
195
Trond Myklebust1549210f2012-06-05 09:16:47 -0400196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
Andy Adamsone23008e2012-10-02 21:07:32 -0400214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
David Quigleya09df2c2013-05-22 12:50:41 -0400220const u32 nfs4_statfs_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
David Quigleya09df2c2013-05-22 12:50:41 -0400229const u32 nfs4_pathconf_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
Fred Isamandae100c2011-07-30 20:52:37 -0400235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
Ricardo Labiaga55b6e772010-10-12 16:30:06 -0700239 FATTR4_WORD1_TIME_DELTA
Fred Isamandae100c2011-07-30 20:52:37 -0400240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_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 */
Peter Staubach4e769b92007-08-03 15:07:10 -0400298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
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 */
Peter Staubach4e769b92007-08-03 15:07:10 -0400310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
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
Trond Myklebust65de8722008-12-23 15:21:44 -0500317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
Colin Cross416ad3c2013-05-06 23:50:06 +0000327 freezable_schedule_timeout_killable_unsafe(*timeout);
Trond Myklebust65de8722008-12-23 15:21:44 -0500328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
Trond Myklebustb064eca22011-02-22 15:44:32 -0800337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Trond Myklebust65de8722008-12-23 15:21:44 -0500338{
339 struct nfs_client *clp = server->nfs_client;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500340 struct nfs4_state *state = exception->state;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500341 struct inode *inode = exception->inode;
Trond Myklebust65de8722008-12-23 15:21:44 -0500342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500348 case -NFS4ERR_OPENMODE:
Bryan Schumaker011e2a72012-06-20 15:53:43 -0400349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
Bryan Schumaker57ec14c2012-06-20 15:53:44 -0400350 nfs4_inode_return_delegation(inode);
Trond Myklebust3114ea72012-03-07 16:39:06 -0500351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500359 goto wait_on_recovery;
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -0500360 case -NFS4ERR_DELEG_REVOKED:
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
Trond Myklebustb570a972013-04-12 15:04:51 -0400363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
Trond Myklebust9e33bed2008-12-23 15:21:46 -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 Myklebust0400a6b2011-03-09 16:00:53 -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_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
Andy Adamsona8a4ae32011-05-03 13:43:03 -0400418 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebust65de8722008-12-23 15:21:44 -0500419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
Trond Myklebustb064eca22011-02-22 15:44:32 -0800421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500437wait_on_recovery:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500438 ret = nfs4_wait_clnt_recover(clp);
Chuck Lever519ae252013-10-17 14:13:19 -0400439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
Trond Myklebust65de8722008-12-23 15:21:44 -0500444}
445
Weston Andros Adamsona5250de2013-09-03 15:18:49 -0400446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
Trond Myklebust65de8722008-12-23 15:21:44 -0500460
Trond Myklebust452e9352010-07-31 14:29:06 -0400461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
Trond Myklebust452e9352010-07-31 14:29:06 -0400469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
Chuck Levera9c92d62013-08-09 12:48:18 -0400480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
Chuck Lever3bd23842013-08-09 12:49:19 -0400495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
Trond Myklebustcab92c12014-01-29 12:12:15 -0500542 if (slot == NULL)
Chuck Lever3bd23842013-08-09 12:49:19 -0400543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400556#if defined(CONFIG_NFS_V4_1)
557
Trond Myklebustd185a332010-06-16 09:52:25 -0400558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
Andy Adamson13615872009-04-01 09:22:17 -0400559{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500560 struct nfs4_session *session;
Andy Adamson13615872009-04-01 09:22:17 -0400561 struct nfs4_slot_table *tbl;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500562 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500563 bool send_new_highest_used_slotid = false;
Andy Adamson13615872009-04-01 09:22:17 -0400564
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500565 tbl = slot->table;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500566 session = tbl->session;
Andy Adamsonea028ac2009-12-04 15:55:38 -0500567
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500568 spin_lock(&tbl->slot_tbl_lock);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500579 nfs4_free_slot(tbl, slot);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500583out_unlock:
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500584 spin_unlock(&tbl->slot_tbl_lock);
Benny Halevydfb4f3092010-09-24 09:17:01 -0400585 res->sr_slot = NULL;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
Andy Adamson13615872009-04-01 09:22:17 -0400588}
589
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Andy Adamsonb0df8062009-04-01 09:22:18 -0400591{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500592 struct nfs4_session *session;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500593 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebust14516c32010-07-31 14:29:06 -0400594 struct nfs_client *clp;
Trond Myklebustac20d162012-12-15 15:36:07 -0500595 bool interrupted = false;
Trond Myklebust85563072012-12-11 10:31:12 -0500596 int ret = 1;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400597
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500598 if (slot == NULL)
599 goto out_noaction;
Bryan Schumaker468f8612011-04-18 15:57:32 -0400600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
Andy Adamsonb0df8062009-04-01 09:22:18 -0400602 goto out;
603
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500604 session = slot->table->session;
Trond Myklebust933602e2012-11-16 12:12:38 -0500605
Trond Myklebustac20d162012-12-15 15:36:07 -0500606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400611 trace_nfs4_sequence_done(session, res);
Andy Adamson691daf32009-12-04 15:55:39 -0500612 /* Check the SEQUENCE operation status */
Trond Myklebust14516c32010-07-31 14:29:06 -0400613 switch (res->sr_status) {
614 case 0:
Andy Adamsonb0df8062009-04-01 09:22:18 -0400615 /* Update the slot's sequence and clientid lease timer */
Trond Myklebust933602e2012-11-16 12:12:38 -0500616 ++slot->seq_nr;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500617 clp = session->clp;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500618 do_renew_lease(clp, res->sr_timestamp);
Alexandros Batsakis0629e372009-12-05 13:46:14 -0500619 /* Check sequence flags */
Trond Myklebustb4410c22011-03-09 16:00:55 -0500620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
Trond Myklebust464ee9f2012-11-20 12:49:27 -0500622 nfs41_update_target_slotid(slot->table, slot, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400623 break;
Trond Myklebustac20d162012-12-15 15:36:07 -0500624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400639 __func__,
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500640 slot->slot_nr,
Trond Myklebust933602e2012-11-16 12:12:38 -0500641 slot->seq_nr);
Trond Myklebust14516c32010-07-31 14:29:06 -0400642 goto out_retry;
Trond Myklebust85563072012-12-11 10:31:12 -0500643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
Trond Myklebuste8794442012-12-15 13:56:18 -0500648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
650 /*
Trond Myklebustac20d162012-12-15 15:36:07 -0500651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
658 /*
Trond Myklebuste8794442012-12-15 13:56:18 -0500659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
Trond Myklebuste8794442012-12-15 13:56:18 -0500667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
Trond Myklebust14516c32010-07-31 14:29:06 -0400670 default:
671 /* Just update the slot sequence no. */
Trond Myklebust933602e2012-11-16 12:12:38 -0500672 ++slot->seq_nr;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
Trond Myklebustd185a332010-06-16 09:52:25 -0400677 nfs41_sequence_free_slot(res);
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500678out_noaction:
Trond Myklebust85563072012-12-11 10:31:12 -0500679 return ret;
Trond Myklebuste8794442012-12-15 13:56:18 -0500680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400686out_retry:
Trond Myklebustd05dd4e2010-07-31 14:29:07 -0400687 if (!rpc_restart_call(task))
Trond Myklebust14516c32010-07-31 14:29:06 -0400688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400691}
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
Andy Adamsonb0df8062009-04-01 09:22:18 -0400693
Trond Myklebust14516c32010-07-31 14:29:06 -0400694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400696{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500697 if (res->sr_slot == NULL)
Trond Myklebust14516c32010-07-31 14:29:06 -0400698 return 1;
Chuck Lever3bd23842013-08-09 12:49:19 -0400699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400701 return nfs41_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400702}
703
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000704int nfs41_setup_sequence(struct nfs4_session *session,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400707 struct rpc_task *task)
708{
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400711
712 dprintk("--> %s\n", __func__);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400713 /* slot already allocated? */
Benny Halevydfb4f3092010-09-24 09:17:01 -0400714 if (res->sr_slot != NULL)
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400715 goto out_success;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400716
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400717 tbl = &session->fc_slot_table;
718
Trond Myklebust69d206b2012-11-22 13:21:02 -0500719 task->tk_timeout = 0;
720
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400721 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson774d5f12013-05-20 14:13:50 -0400722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400723 !args->sa_privileged) {
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500724 /* The state manager will wait until the slot table is empty */
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500725 dprintk("%s session is draining\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400726 goto out_sleep;
Andy Adamsonb069d942009-04-01 09:22:43 -0400727 }
728
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500729 slot = nfs4_alloc_slot(tbl);
Trond Myklebust69d206b2012-11-22 13:21:02 -0500730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400734 dprintk("<-- %s: no free slots\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400735 goto out_sleep;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
Trond Myklebust2b2fa712012-11-16 12:58:36 -0500739 args->sa_slot = slot;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400740
Chuck Levere8d92382013-08-09 12:47:51 -0400741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500742 slot->slot_nr, slot->seq_nr);
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400743
Benny Halevydfb4f3092010-09-24 09:17:01 -0400744 res->sr_slot = slot;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500745 res->sr_timestamp = jiffies;
Trond Myklebust2a6e26c2010-06-16 09:52:25 -0400746 res->sr_status_flags = 0;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400752 trace_nfs4_setup_sequence(session, args);
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400753out_success:
754 rpc_call_start(task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400755 return 0;
Trond Myklebust7b939a32012-11-01 15:19:46 -0400756out_sleep:
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
Trond Myklebust1e1093c2012-11-01 16:44:05 -0400759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400765}
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400767
Chuck Lever5a580e02013-08-09 12:48:09 -0400768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
Andy Adamsonce5039c2009-04-01 09:22:13 -0400772{
Trond Myklebust035168a2010-06-16 09:52:26 -0400773 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400774 int ret = 0;
775
Chuck Lever3bd23842013-08-09 12:49:19 -0400776 if (!session)
777 return nfs40_setup_sequence(server, args, res, task);
Trond Myklebust035168a2010-06-16 09:52:26 -0400778
Chuck Levere8d92382013-08-09 12:47:51 -0400779 dprintk("--> %s clp %p session %p sr_slot %u\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400780 __func__, session->clp, session, res->sr_slot ?
Chuck Levere8d92382013-08-09 12:47:51 -0400781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
Trond Myklebust035168a2010-06-16 09:52:26 -0400782
Trond Myklebust9d12b212012-01-17 22:04:25 -0500783 ret = nfs41_setup_sequence(session, args, res, task);
Chuck Lever3bd23842013-08-09 12:49:19 -0400784
Andy Adamsonce5039c2009-04-01 09:22:13 -0400785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
Andy Adamsonce5039c2009-04-01 09:22:13 -0400789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400791 struct nfs4_call_sync_data *data = calldata;
Trond Myklebust6ba7db32012-10-22 20:07:20 -0400792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400793
Trond Myklebust035168a2010-06-16 09:52:26 -0400794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400797}
798
Andy Adamson69ab40c2009-04-01 09:22:19 -0400799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400801 struct nfs4_call_sync_data *data = calldata;
Andy Adamson69ab40c2009-04-01 09:22:19 -0400802
Trond Myklebust14516c32010-07-31 14:29:06 -0400803 nfs41_sequence_done(task, data->seq_res);
Andy Adamson69ab40c2009-04-01 09:22:19 -0400804}
805
Trond Myklebust17280172012-03-11 13:11:00 -0400806static const struct rpc_call_ops nfs41_call_sync_ops = {
Andy Adamsonce5039c2009-04-01 09:22:13 -0400807 .rpc_call_prepare = nfs41_call_sync_prepare,
Andy Adamson69ab40c2009-04-01 09:22:19 -0400808 .rpc_call_done = nfs41_call_sync_done,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400809};
810
Chuck Lever3bd23842013-08-09 12:49:19 -0400811#else /* !CONFIG_NFS_V4_1 */
812
Chuck Lever5a580e02013-08-09 12:48:09 -0400813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
Chuck Lever3bd23842013-08-09 12:49:19 -0400818 return nfs40_setup_sequence(server, args, res, task);
Chuck Lever5a580e02013-08-09 12:48:09 -0400819}
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400820
Trond Myklebust14516c32010-07-31 14:29:06 -0400821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400823{
Chuck Lever3bd23842013-08-09 12:49:19 -0400824 return nfs40_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400825}
Chuck Lever3bd23842013-08-09 12:49:19 -0400826
827#endif /* !CONFIG_NFS_V4_1 */
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400828
Chuck Lever9915ea72013-08-09 12:48:27 -0400829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
Trond Myklebustad389da2007-06-05 12:30:00 -0400848 struct nfs_server *server,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500849 struct rpc_message *msg,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100850 struct nfs4_sequence_args *args,
851 struct nfs4_sequence_res *res)
Trond Myklebustad389da2007-06-05 12:30:00 -0400852{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100853 int ret;
854 struct rpc_task *task;
Chuck Lever9915ea72013-08-09 12:48:27 -0400855 struct nfs_client *clp = server->nfs_client;
856 struct nfs4_call_sync_data data = {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100857 .seq_server = server,
858 .seq_args = args,
859 .seq_res = res,
860 };
861 struct rpc_task_setup task_setup = {
862 .rpc_client = clnt,
863 .rpc_message = msg,
Chuck Lever9915ea72013-08-09 12:48:27 -0400864 .callback_ops = clp->cl_mvops->call_sync_ops,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100865 .callback_data = &data
866 };
867
868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
Trond Myklebustad389da2007-06-05 12:30:00 -0400873 rpc_put_task(task);
874 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100875 return ret;
876}
877
Trond Myklebustfd0c0952012-11-01 14:43:38 -0400878static
Bryan Schumaker7c513052011-03-24 17:12:24 +0000879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
Chuck Levera9c92d62013-08-09 12:48:18 -0400886 nfs4_init_sequence(args, res, cache_reply);
Chuck Lever9915ea72013-08-09 12:48:27 -0400887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000888}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
891{
892 struct nfs_inode *nfsi = NFS_I(dir);
893
894 spin_lock(&dir->i_lock);
Trond Myklebust359d7d12012-05-28 10:01:34 -0400895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700896 if (!cinfo->atomic || cinfo->before != dir->i_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 nfs_force_lookup_revalidate(dir);
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700898 dir->i_version = cinfo->after;
David Howellsde242c02012-12-20 21:52:38 +0000899 nfs_fscache_invalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 spin_unlock(&dir->i_lock);
901}
902
903struct nfs4_opendata {
904 struct kref kref;
905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
Trond Myklebust6926afd2012-01-07 13:22:46 -0500909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 struct nfs_fattr f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400912 struct nfs4_label *f_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 struct dentry *dir;
Al Viro82a2c1b2011-06-22 18:30:55 -0400914 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 struct nfs4_state_owner *owner;
916 struct nfs4_state *state;
917 struct iattr attrs;
918 unsigned long timestamp;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400919 unsigned int rpc_done : 1;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -0400920 unsigned int file_created : 1;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -0400921 unsigned int is_recover : 1;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400922 int rpc_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 int cancelled;
924};
Trond Myklebustdecf4912005-10-27 22:12:39 -0400925
Trond Myklebust49f9a0f2013-03-15 16:44:28 -0400926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100957{
958 p->o_res.f_attr = &p->f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400959 p->o_res.f_label = p->f_label;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
962 p->o_res.server = p->o_arg.server;
Andy Adamson5f657532012-10-03 02:39:34 -0400963 p->o_res.access_request = p->o_arg.access;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100964 nfs_fattr_init(&p->f_attr);
Trond Myklebust6926afd2012-01-07 13:22:46 -0500965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100966}
967
Al Viro82a2c1b2011-06-22 18:30:55 -0400968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400970 const struct iattr *attrs,
David Quigley1775fd32013-05-22 12:50:42 -0400971 struct nfs4_label *label,
Trond Myklebust4a1c0892013-03-15 14:57:33 -0400972 enum open_claim_type4 claim,
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400973 gfp_t gfp_mask)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100974{
Al Viro82a2c1b2011-06-22 18:30:55 -0400975 struct dentry *parent = dget_parent(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400980 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100981 if (p == NULL)
982 goto err;
David Quigley14c43f72013-05-22 12:50:43 -0400983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100989 if (p->o_arg.seqid == NULL)
David Quigley14c43f72013-05-22 12:50:43 -0400990 goto err_free_label;
Al Viro82a2c1b2011-06-22 18:30:55 -0400991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -0700998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001005 }
David Howells7539bba2006-08-22 20:06:09 -04001006 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
Al Viro82a2c1b2011-06-22 18:30:55 -04001009 p->o_arg.name = &dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001010 p->o_arg.server = server;
David Quigleyaa9c2662013-05-22 12:50:44 -04001011 p->o_arg.bitmask = nfs4_bitmask(server, label);
Trond Myklebust1549210f2012-06-05 09:16:47 -04001012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
David Quigley1775fd32013-05-22 12:50:42 -04001013 p->o_arg.label = label;
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
Trond Myklebust536e43d2012-01-17 22:04:26 -05001027 if (attrs != NULL && attrs->ia_valid != 0) {
Trond Myklebustc281fa9c2013-08-20 21:06:49 -04001028 __u32 verf[2];
Trond Myklebustd77d76f2010-06-16 09:52:27 -04001029
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
Chuck Levercd937102012-03-02 17:14:31 -05001032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001037 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001041 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001042 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001043 return p;
David Quigley14c43f72013-05-22 12:50:43 -04001044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001054static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001055{
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
Al Viro82a2c1b2011-06-22 18:30:55 -04001058 struct super_block *sb = p->dentry->d_sb;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001059
1060 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001063 nfs4_put_state_owner(p->owner);
David Quigley14c43f72013-05-22 12:50:43 -04001064
1065 nfs4_label_free(p->f_label);
1066
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001067 dput(p->dir);
Al Viro82a2c1b2011-06-22 18:30:55 -04001068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001070 nfs_fattr_free_names(&p->f_attr);
Trond Myklebuste911b812014-03-26 13:24:37 -07001071 kfree(p->f_attr.mdsthreshold);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001072 kfree(p);
1073}
1074
1075static void nfs4_opendata_put(struct nfs4_opendata *p)
1076{
1077 if (p != NULL)
1078 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001079}
1080
Trond Myklebust06f814a2006-01-03 09:55:07 +01001081static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1082{
Trond Myklebust06f814a2006-01-03 09:55:07 +01001083 int ret;
1084
Trond Myklebust06f814a2006-01-03 09:55:07 +01001085 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +01001086 return ret;
1087}
1088
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001089static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
Trond Myklebust6ee41262007-07-08 14:11:36 -04001090{
1091 int ret = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001092
Trond Myklebust536e43d2012-01-17 22:04:26 -05001093 if (open_mode & (O_EXCL|O_TRUNC))
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001094 goto out;
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001096 case FMODE_READ:
Trond Myklebust88069f72009-12-08 08:33:16 -05001097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001099 break;
1100 case FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001103 break;
1104 case FMODE_READ|FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001107 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001108out:
Trond Myklebust6ee41262007-07-08 14:11:36 -04001109 return ret;
1110}
1111
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001112static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001113{
Trond Myklebust652f89f2011-12-09 19:05:58 -05001114 if (delegation == NULL)
1115 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001116 if ((delegation->type & fmode) != fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001117 return 0;
Trond Myklebust15c831b2008-12-23 15:21:39 -05001118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
Trond Myklebustaac00a82007-07-05 19:02:21 -04001119 return 0;
Trond Myklebustd25be542013-02-05 11:43:28 -05001120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
Trond Myklebustb7391f42008-12-23 15:21:52 -05001122 nfs_mark_delegation_referenced(delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001123 return 1;
1124}
1125
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
Trond Myklebuste7616922006-01-03 09:55:13 +01001127{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001128 switch (fmode) {
Trond Myklebuste7616922006-01-03 09:55:13 +01001129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001138 nfs4_state_set_mode_locked(state, state->state | fmode);
Trond Myklebuste7616922006-01-03 09:55:13 +01001139}
1140
Trond Myklebust4f14c192014-02-12 19:15:06 -05001141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
Trond Myklebust003707c2007-07-05 18:07:55 -04001142{
Trond Myklebust4f14c192014-02-12 19:15:06 -05001143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
Trond Myklebuste999e802014-02-10 18:20:47 -05001156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
Trond Myklebuste999e802014-02-10 18:20:47 -05001163 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001164 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
Trond Myklebust226056c2014-02-11 10:41:07 -05001170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
1172{
1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
Trond Myklebust003707c2007-07-05 18:07:55 -04001190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust226056c2014-02-11 10:41:07 -05001193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
Trond Myklebust4f14c192014-02-12 19:15:06 -05001200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust226056c2014-02-11 10:41:07 -05001202}
1203
Trond Myklebust003707c2007-07-05 18:07:55 -04001204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1205{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001206 switch (fmode) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001221}
1222
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001223static 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 -07001224{
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001230 if (deleg_stateid != NULL) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001238 update_open_stateflags(state, fmode);
Trond Myklebustec073422005-10-20 14:22:47 -07001239 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240}
1241
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001242static 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 -05001243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001248 fmode &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust34310432008-12-23 15:21:38 -05001249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
Trond Myklebust17f26b12013-08-21 15:48:42 -04001256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
Trond Myklebustd25be542013-02-05 11:43:28 -05001257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001258 (deleg_cur->type & fmode) != fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
Trond Myklebustf597c532012-03-04 18:13:56 -05001263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
Trond Myklebust34310432008-12-23 15:21:38 -05001264 goto no_delegation_unlock;
1265
Trond Myklebustb7391f42008-12-23 15:21:52 -05001266 nfs_mark_delegation_referenced(deleg_cur);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001275 __update_open_stateid(state, open_stateid, NULL, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001276 ret = 1;
1277 }
Trond Myklebust4f14c192014-02-12 19:15:06 -05001278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust34310432008-12-23 15:21:38 -05001280
1281 return ret;
1282}
1283
1284
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
Trond Myklebustaac00a82007-07-05 19:02:21 -04001292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04001296 nfs4_inode_return_delegation(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001297}
1298
Trond Myklebust6ee41262007-07-08 14:11:36 -04001299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
Trond Myklebustf448bad2013-05-29 15:36:40 -04001304 int open_mode = opendata->o_arg.open_flags;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001305 fmode_t fmode = opendata->o_arg.fmode;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
Trond Myklebustaac00a82007-07-05 19:02:21 -04001309 for (;;) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001310 if (can_open_cached(state, fmode, open_mode)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001311 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001314 spin_unlock(&state->owner->so_lock);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001315 goto out_return_state;
1316 }
1317 spin_unlock(&state->owner->so_lock);
1318 }
Trond Myklebust34310432008-12-23 15:21:38 -05001319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebust652f89f2011-12-09 19:05:58 -05001321 if (!can_open_delegated(delegation, fmode)) {
Trond Myklebust34310432008-12-23 15:21:38 -05001322 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001323 break;
Trond Myklebust34310432008-12-23 15:21:38 -05001324 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001325 /* Save the delegation */
Trond Myklebustf597c532012-03-04 18:13:56 -05001326 nfs4_stateid_copy(&stateid, &delegation->stateid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001327 rcu_read_unlock();
Trond Myklebustfa332942013-04-09 12:56:52 -04001328 nfs_release_seqid(opendata->o_arg.seqid);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001334 ret = -EAGAIN;
Trond Myklebust34310432008-12-23 15:21:38 -05001335
1336 /* Try to update the stateid using the delegation */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001337 if (update_open_stateid(state, NULL, &stateid, fmode))
Trond Myklebust34310432008-12-23 15:21:38 -05001338 goto out_return_state;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001339 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
Andy Adamsone23008e2012-10-02 21:07:32 -04001347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
Andy Adamsone23008e2012-10-02 21:07:32 -04001392 }
1393
Andy Adamsone23008e2012-10-02 21:07:32 -04001394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001400update:
Andy Adamsone23008e2012-10-02 21:07:32 -04001401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
Trond Myklebustd49f0422013-10-28 14:57:12 -04001403 atomic_inc(&state->count);
Andy Adamsone23008e2012-10-02 21:07:32 -04001404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001416 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001417
Trond Myklebustaac00a82007-07-05 19:02:21 -04001418 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001419 state = nfs4_try_open_cached(data);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001420 goto out;
1421 }
1422
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001423 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001425 goto err;
David Quigley1775fd32013-05-22 12:50:42 -04001426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001427 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -05001428 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001429 goto err;
1430 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001433 goto err_put_inode;
Andy Adamsone23008e2012-10-02 21:07:32 -04001434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
Trond Myklebust34310432008-12-23 15:21:38 -05001436 update_open_stateid(state, &data->o_res.stateid, NULL,
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001437 data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001438 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001439out:
Trond Myklebust7aa262b52013-02-28 16:19:59 -08001440 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001441 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001446}
1447
Andy Adamsone23008e2012-10-02 21:07:32 -04001448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
Trond Myklebust864472e2006-01-03 09:55:15 +01001456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001475{
1476 struct nfs4_opendata *opendata;
1477
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
David Quigley1775fd32013-05-22 12:50:42 -04001479 NULL, NULL, claim, GFP_NOFS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
Trond Myklebust864472e2006-01-03 09:55:15 +01001488{
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001489 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001490 int ret;
1491
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001497 ret = _nfs4_recover_proc_open(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001498 if (ret != 0)
1499 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001500 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
Al Viro643168c2011-06-22 18:20:23 -04001503 nfs4_close_state(newstate, fmode);
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001504 *res = newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
Trond Myklebust864472e2006-01-03 09:55:15 +01001510 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001511 int ret;
1512
Trond Myklebust4f14c192014-02-12 19:15:06 -05001513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001517 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04001519 clear_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001520 smp_rmb();
1521 if (state->n_rdwr != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001523 if (ret != 0)
1524 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001525 if (newstate != state)
1526 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001527 }
1528 if (state->n_wronly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001530 if (ret != 0)
1531 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001532 if (newstate != state)
1533 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001534 }
1535 if (state->n_rdonly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001537 if (ret != 0)
1538 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001539 if (newstate != state)
1540 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001541 }
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
Trond Myklebustf597c532012-03-04 18:13:56 -05001547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001548 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001551 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001552 }
Trond Myklebust864472e2006-01-03 09:55:15 +01001553 return 0;
1554}
1555
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 */
Trond Myklebust539cd032007-06-05 11:46:42 -04001560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001562 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +01001563 struct nfs4_opendata *opendata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001564 fmode_t delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 int status;
1566
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust15c831b2008-12-23 15:21:39 -05001573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -04001574 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001575 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +01001576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001578 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 return status;
1580}
1581
Trond Myklebust539cd032007-06-05 11:46:42 -04001582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04001588 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04001589 trace_nfs4_open_reclaim(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
Trond Myklebust168667c2010-10-19 19:47:49 -04001592 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00001593 break;
1594 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 } while (exception.retry);
1596 return err;
1597}
1598
Trond Myklebust864472e2006-01-03 09:55:15 +01001599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04001606 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04001607 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04001612static 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 -07001613{
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
Chuck Lever352297b2013-10-17 14:13:24 -04001637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04001640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04001646 case -NFS4ERR_OPENMODE:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001650 return 0;
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04001656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001660 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 return err;
1662}
1663
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04001664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
Chuck Leverbe05c862013-08-09 12:49:47 -04001680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
Chuck Leverbe05c862013-08-09 12:49:47 -04001686}
1687
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001692 nfs40_sequence_done(task, &data->c_res.seq_res);
Chuck Leverbe05c862013-08-09 12:49:47 -04001693
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001694 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001695 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
Trond Myklebustbb226292008-01-02 15:19:18 -05001697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001698 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -04001699 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001700 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001712 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001713 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001714 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001715 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001716 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001717out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001718 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
Chuck Leverbe05c862013-08-09 12:49:47 -04001722 .rpc_call_prepare = nfs4_open_confirm_prepare,
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001742 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001745 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001746 .flags = RPC_TASK_ASYNC,
1747 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 int status;
1749
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001751 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001752 data->rpc_done = 0;
1753 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001754 data->timestamp = jiffies;
Trond Myklebustc970aa82007-07-14 15:39:59 -04001755 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05001756 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001757 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05001764 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 return status;
1766}
1767
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769{
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust549b19c2013-04-16 18:42:34 -04001772 struct nfs_client *clp = sp->so_server->nfs_client;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001773
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001775 goto out_wait;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
Trond Myklebust6ee41262007-07-08 14:11:36 -04001784 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
Trond Myklebust652f89f2011-12-09 19:05:58 -05001787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
Trond Myklebustcd4c9be2013-04-23 14:46:25 -04001788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
Trond Myklebust652f89f2011-12-09 19:05:58 -05001789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001791 rcu_read_unlock();
1792 }
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001793 /* Update client id. */
Trond Myklebust549b19c2013-04-16 18:42:34 -04001794 data->o_arg.clientid = clp->cl_clientid;
Trond Myklebust8188df12013-04-23 14:31:19 -04001795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
Trond Myklebust8188df12013-04-23 14:31:19 -04001800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001804 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04001805 if (nfs4_setup_sequence(data->o_arg.server,
Andy Adamsond8985282009-04-01 09:22:21 -04001806 &data->o_arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04001807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust549b19c2013-04-16 18:42:34 -04001810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
Trond Myklebust6ee41262007-07-08 14:11:36 -04001820 return;
Trond Myklebust652f89f2011-12-09 19:05:58 -05001821unlock_no_action:
1822 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001823out_no_action:
1824 task->tk_action = NULL;
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001825out_wait:
Trond Myklebustb75ad4c2012-11-29 17:27:47 -05001826 nfs4_sequence_done(task, &data->o_res.seq_res);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001827}
1828
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001833 data->rpc_status = task->tk_status;
Andy Adamsond8985282009-04-01 09:22:21 -04001834
Trond Myklebust14516c32010-07-31 14:29:06 -04001835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
Andy Adamsond8985282009-04-01 09:22:21 -04001837
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001838 if (task->tk_status == 0) {
Trond Myklebust807d66d82012-10-02 17:09:00 -07001839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -07001841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001844 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -07001845 break;
1846 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001847 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -07001848 break;
1849 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001850 data->rpc_status = -ENOTDIR;
Trond Myklebust807d66d82012-10-02 17:09:00 -07001851 }
Trond Myklebust6f926b52005-10-18 14:20:18 -07001852 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001853 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -04001854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -07001856 }
Trond Myklebust3e309912007-07-07 13:19:59 -04001857 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001858}
Trond Myklebust6f926b52005-10-18 14:20:18 -07001859
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001869 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001874 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001875 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001876 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001877out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001878 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001902 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001905 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001906 .flags = RPC_TASK_ASYNC,
1907 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001908 int status;
1909
Chuck Levera9c92d62013-08-09 12:48:18 -04001910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001911 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001912 data->rpc_done = 0;
1913 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001914 data->cancelled = 0;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001915 data->is_recover = 0;
1916 if (isrecover) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04001917 nfs4_set_sequence_privileged(&o_arg->seq_args);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001918 data->is_recover = 1;
1919 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04001920 task = rpc_run_task(&task_setup_data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
Trond Myklebust6926afd2012-01-07 13:22:46 -05001944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
Trond Myklebustf3792d62014-07-10 08:54:32 -04001955/*
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1959 * the same.
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1962 */
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001963static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05001965 struct nfs4_state *state, fmode_t fmode,
1966 int openflags)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001967{
1968 struct nfs_access_entry cache;
1969 u32 mask;
1970
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1974 return 0;
1975
1976 mask = 0;
Trond Myklebustf3792d62014-07-10 08:54:32 -04001977 /*
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1980 */
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05001981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1983 mask = MAY_EXEC;
Trond Myklebustf3792d62014-07-10 08:54:32 -04001984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05001985 mask = MAY_READ;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001986
1987 cache.cred = cred;
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1991
Weston Andros Adamsonbbd3a8e2012-10-02 14:49:51 -07001992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001993 return 0;
1994
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
Weston Andros Adamson998f40b2012-11-02 18:00:56 -04001997 return -EACCES;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001998}
1999
Alexandros Batsakisb2579572009-12-14 21:27:57 -08002000/*
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2002 */
2003static int _nfs4_proc_open(struct nfs4_opendata *data)
2004{
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 0);
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002012 if (!data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002013 return status;
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002014 if (status != 0) {
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2017 return -ENOENT;
2018 return status;
2019 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002020
Trond Myklebust6926afd2012-01-07 13:22:46 -05002021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2022
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002023 if (o_arg->open_flags & O_CREAT) {
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002024 update_changeattr(dir, &o_res->cinfo);
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2029 }
Trond Myklebust0df5dd42010-04-11 16:48:44 -04002030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +01002033 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002035 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 }
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Andy Adamson8935ef62014-05-23 06:22:59 -07002038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002039 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040}
2041
Andy Adamsond83217c2011-03-01 01:34:17 +00002042static int nfs4_recover_expired_lease(struct nfs_server *server)
2043{
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2045}
2046
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047/*
2048 * OPEN_EXPIRED:
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2051 */
Trond Myklebust539cd032007-06-05 11:46:42 -04002052static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053{
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002054 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +01002055 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002058 NFS4_OPEN_CLAIM_FH);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04002059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002061 ret = nfs4_open_recover(opendata, state);
Trond Myklebust35d05772008-04-05 15:54:17 -04002062 if (ret == -ESTALE)
Al Viro3d4ff432011-06-22 18:40:12 -04002063 d_drop(ctx->dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002064 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002065 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066}
2067
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002068static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +00002069{
Trond Myklebust539cd032007-06-05 11:46:42 -04002070 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +00002071 struct nfs4_exception exception = { };
2072 int err;
2073
2074 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04002075 err = _nfs4_open_expired(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04002076 trace_nfs4_open_expired(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2078 continue;
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002079 switch (err) {
2080 default:
2081 goto out;
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2085 err = 0;
2086 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00002087 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002088out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00002089 return err;
2090}
2091
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01002095 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096
Trond Myklebust864472e2006-01-03 09:55:15 +01002097 ctx = nfs4_state_find_open_context(state);
2098 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04002099 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04002100 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01002101 put_nfs_open_context(ctx);
2102 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103}
2104
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002105#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002106static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002107{
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002108 struct nfs_server *server = NFS_SERVER(state->inode);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002109 nfs4_stateid *stateid = &state->stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002110 struct nfs_delegation *delegation;
2111 struct rpc_cred *cred = NULL;
2112 int status = -NFS4ERR_BAD_STATEID;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002113
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002114 /* If a state reset has been done, test_stateid is unneeded */
2115 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2116 return;
2117
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002118 /* Get the delegation credential for use by test/free_stateid */
2119 rcu_read_lock();
2120 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2121 if (delegation != NULL &&
2122 nfs4_stateid_match(&delegation->stateid, stateid)) {
2123 cred = get_rpccred(delegation->cred);
2124 rcu_read_unlock();
2125 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002126 trace_nfs4_test_delegation_stateid(state, NULL, status);
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002127 } else
2128 rcu_read_unlock();
2129
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002130 if (status != NFS_OK) {
2131 /* Free the stateid unless the server explicitly
2132 * informs us the stateid is unrecognized. */
2133 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002134 nfs41_free_stateid(server, stateid, cred);
Bryan Schumaker69388672012-09-26 15:25:52 -04002135 nfs_remove_bad_delegation(state->inode);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002136
Bryan Schumaker69388672012-09-26 15:25:52 -04002137 write_seqlock(&state->seqlock);
2138 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2139 write_sequnlock(&state->seqlock);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002140 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2141 }
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002142
2143 if (cred != NULL)
2144 put_rpccred(cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002145}
2146
2147/**
2148 * nfs41_check_open_stateid - possibly free an open stateid
2149 *
2150 * @state: NFSv4 state for an inode
2151 *
2152 * Returns NFS_OK if recovery for this stateid is now finished.
2153 * Otherwise a negative NFS4ERR value is returned.
2154 */
2155static int nfs41_check_open_stateid(struct nfs4_state *state)
2156{
2157 struct nfs_server *server = NFS_SERVER(state->inode);
Bryan Schumakerfcb6d9c2012-09-26 15:25:53 -04002158 nfs4_stateid *stateid = &state->open_stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002159 struct rpc_cred *cred = state->owner->so_cred;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002160 int status;
2161
2162 /* If a state reset has been done, test_stateid is unneeded */
2163 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2164 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2165 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2166 return -NFS4ERR_BAD_STATEID;
2167
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002168 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002169 trace_nfs4_test_open_stateid(state, NULL, status);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002170 if (status != NFS_OK) {
2171 /* Free the stateid unless the server explicitly
2172 * informs us the stateid is unrecognized. */
2173 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002174 nfs41_free_stateid(server, stateid, cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002175
2176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2178 clear_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04002179 clear_bit(NFS_OPEN_STATE, &state->flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002180 }
2181 return status;
2182}
2183
2184static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2185{
Chuck Levereb64cf92012-07-11 16:30:05 -04002186 int status;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002187
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002188 nfs41_clear_delegation_stateid(state);
2189 status = nfs41_check_open_stateid(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04002190 if (status != NFS_OK)
2191 status = nfs4_open_expired(sp, state);
2192 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002193}
2194#endif
2195
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002197 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2198 * fields corresponding to attributes that were used to store the verifier.
2199 * Make sure we clobber those fields in the later setattr call
2200 */
2201static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2202{
2203 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2204 !(sattr->ia_valid & ATTR_ATIME_SET))
2205 sattr->ia_valid |= ATTR_ATIME;
2206
2207 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2208 !(sattr->ia_valid & ATTR_MTIME_SET))
2209 sattr->ia_valid |= ATTR_MTIME;
2210}
2211
Trond Myklebustc21443c2013-02-07 14:26:21 -05002212static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2213 fmode_t fmode,
2214 int flags,
Trond Myklebust3efb9722013-05-29 13:17:04 -04002215 struct nfs_open_context *ctx)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002216{
2217 struct nfs4_state_owner *sp = opendata->owner;
2218 struct nfs_server *server = sp->so_server;
Trond Myklebust275bb302013-05-29 13:11:28 -04002219 struct dentry *dentry;
Trond Myklebustc21443c2013-02-07 14:26:21 -05002220 struct nfs4_state *state;
2221 unsigned int seq;
2222 int ret;
2223
2224 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2225
2226 ret = _nfs4_proc_open(opendata);
NeilBrown4fa2c542014-07-21 13:28:28 +10002227 if (ret != 0) {
2228 if (ret == -ENOENT) {
2229 d_drop(opendata->dentry);
2230 d_add(opendata->dentry, NULL);
2231 nfs_set_verifier(opendata->dentry,
2232 nfs_save_change_attribute(opendata->dir->d_inode));
2233 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002234 goto out;
NeilBrown4fa2c542014-07-21 13:28:28 +10002235 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002236
2237 state = nfs4_opendata_to_nfs4_state(opendata);
2238 ret = PTR_ERR(state);
2239 if (IS_ERR(state))
2240 goto out;
2241 if (server->caps & NFS_CAP_POSIX_LOCK)
2242 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2243
Trond Myklebust275bb302013-05-29 13:11:28 -04002244 dentry = opendata->dentry;
2245 if (dentry->d_inode == NULL) {
2246 /* FIXME: Is this d_drop() ever needed? */
2247 d_drop(dentry);
2248 dentry = d_add_unique(dentry, igrab(state->inode));
2249 if (dentry == NULL) {
2250 dentry = opendata->dentry;
2251 } else if (dentry != ctx->dentry) {
2252 dput(ctx->dentry);
2253 ctx->dentry = dget(dentry);
2254 }
2255 nfs_set_verifier(dentry,
2256 nfs_save_change_attribute(opendata->dir->d_inode));
2257 }
2258
Trond Myklebustc21443c2013-02-07 14:26:21 -05002259 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2260 if (ret != 0)
2261 goto out;
2262
Trond Myklebust3efb9722013-05-29 13:17:04 -04002263 ctx->state = state;
Trond Myklebustc45ffdd2013-05-29 13:34:46 -04002264 if (dentry->d_inode == state->inode) {
2265 nfs_inode_attach_open_context(ctx);
2266 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2267 nfs4_schedule_stateid_recovery(server, state);
2268 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002269out:
2270 return ret;
2271}
2272
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002273/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002274 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 */
Andy Adamson82be4172012-05-23 05:02:35 -04002276static int _nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002277 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002278 int flags,
2279 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002280 struct nfs4_label *label,
2281 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282{
2283 struct nfs4_state_owner *sp;
2284 struct nfs4_state *state = NULL;
2285 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002286 struct nfs4_opendata *opendata;
Trond Myklebust4197a052013-05-29 12:37:49 -04002287 struct dentry *dentry = ctx->dentry;
2288 struct rpc_cred *cred = ctx->cred;
2289 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2290 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002291 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
David Quigley1775fd32013-05-22 12:50:42 -04002292 struct nfs4_label *olabel = NULL;
Trond Myklebustaac00a82007-07-05 19:02:21 -04002293 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294
2295 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296 status = -ENOMEM;
Trond Myklebustd1e284d2012-01-17 22:04:24 -05002297 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2298 if (sp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2300 goto out_err;
2301 }
Trond Myklebust58d97142006-01-03 09:55:24 +01002302 status = nfs4_recover_expired_lease(server);
2303 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002304 goto err_put_state_owner;
Al Viro82a2c1b2011-06-22 18:30:55 -04002305 if (dentry->d_inode != NULL)
2306 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
Trond Myklebust58d97142006-01-03 09:55:24 +01002307 status = -ENOMEM;
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002308 if (dentry->d_inode)
2309 claim = NFS4_OPEN_CLAIM_FH;
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002310 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002311 label, claim, GFP_KERNEL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002312 if (opendata == NULL)
Trond Myklebust95d35cb2008-12-23 15:21:45 -05002313 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314
David Quigley14c43f72013-05-22 12:50:43 -04002315 if (label) {
2316 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2317 if (IS_ERR(olabel)) {
2318 status = PTR_ERR(olabel);
2319 goto err_opendata_put;
2320 }
2321 }
2322
Trond Myklebuste911b812014-03-26 13:24:37 -07002323 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2324 if (!opendata->f_attr.mdsthreshold) {
2325 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2326 if (!opendata->f_attr.mdsthreshold)
2327 goto err_free_label;
2328 }
Trond Myklebust1549210f2012-06-05 09:16:47 -04002329 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
Andy Adamson82be4172012-05-23 05:02:35 -04002330 }
Al Viro82a2c1b2011-06-22 18:30:55 -04002331 if (dentry->d_inode != NULL)
2332 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
Trond Myklebustaac00a82007-07-05 19:02:21 -04002333
Trond Myklebust3efb9722013-05-29 13:17:04 -04002334 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002335 if (status != 0)
David Quigley14c43f72013-05-22 12:50:43 -04002336 goto err_free_label;
Trond Myklebust3efb9722013-05-29 13:17:04 -04002337 state = ctx->state;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002338
Trond Myklebust549b19c2013-04-16 18:42:34 -04002339 if ((opendata->o_arg.open_flags & O_EXCL) &&
2340 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002341 nfs4_exclusive_attrset(opendata, sattr);
2342
2343 nfs_fattr_init(opendata->o_res.f_attr);
2344 status = nfs4_do_setattr(state->inode, cred,
2345 opendata->o_res.f_attr, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002346 state, label, olabel);
2347 if (status == 0) {
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002348 nfs_setattr_update_inode(state->inode, sattr);
David Quigley1775fd32013-05-22 12:50:42 -04002349 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
David Quigleyaa9c2662013-05-22 12:50:44 -04002350 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
David Quigley1775fd32013-05-22 12:50:42 -04002351 }
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002352 }
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002353 if (opendata->file_created)
2354 *opened |= FILE_CREATED;
Andy Adamson82be4172012-05-23 05:02:35 -04002355
Trond Myklebuste911b812014-03-26 13:24:37 -07002356 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
Andy Adamson82be4172012-05-23 05:02:35 -04002357 *ctx_th = opendata->f_attr.mdsthreshold;
Trond Myklebuste911b812014-03-26 13:24:37 -07002358 opendata->f_attr.mdsthreshold = NULL;
2359 }
Andy Adamson82be4172012-05-23 05:02:35 -04002360
David Quigley14c43f72013-05-22 12:50:43 -04002361 nfs4_label_free(olabel);
2362
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002363 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 return 0;
David Quigley14c43f72013-05-22 12:50:43 -04002366err_free_label:
2367 nfs4_label_free(olabel);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002368err_opendata_put:
2369 nfs4_opendata_put(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002370err_put_state_owner:
2371 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 return status;
2374}
2375
2376
Andy Adamson82be4172012-05-23 05:02:35 -04002377static struct nfs4_state *nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002378 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002379 int flags,
2380 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002381 struct nfs4_label *label,
2382 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383{
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002384 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 struct nfs4_exception exception = { };
2386 struct nfs4_state *res;
2387 int status;
2388
2389 do {
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002390 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
Trond Myklebust3efb9722013-05-29 13:17:04 -04002391 res = ctx->state;
Trond Myklebust42113a72013-08-12 16:19:27 -04002392 trace_nfs4_open_file(ctx, flags, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 if (status == 0)
2394 break;
2395 /* NOTE: BAD_SEQID means the server and client disagree about the
2396 * book-keeping w.r.t. state-changing operations
2397 * (OPEN/CLOSE/LOCK/LOCKU...)
2398 * It is actually a sign of a bug on the client or on the server.
2399 *
2400 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07002401 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 * have unhashed the old state_owner for us, and that we can
2403 * therefore safely retry using a new one. We should still warn
2404 * the user though...
2405 */
2406 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust9a3ba432012-03-12 18:01:48 -04002407 pr_warn_ratelimited("NFS: v4 server %s "
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04002408 " returned a bad sequence-id error!\n",
2409 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410 exception.retry = 1;
2411 continue;
2412 }
Trond Myklebust550f5742005-10-18 14:20:21 -07002413 /*
2414 * BAD_STATEID on OPEN means that the server cancelled our
2415 * state before it received the OPEN_CONFIRM.
2416 * Recover by retrying the request as per the discussion
2417 * on Page 181 of RFC3530.
2418 */
2419 if (status == -NFS4ERR_BAD_STATEID) {
2420 exception.retry = 1;
2421 continue;
2422 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04002423 if (status == -EAGAIN) {
2424 /* We must have found a delegation */
2425 exception.retry = 1;
2426 continue;
2427 }
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002428 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2429 continue;
2430 res = ERR_PTR(nfs4_handle_exception(server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 status, &exception));
2432 } while (exception.retry);
2433 return res;
2434}
2435
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002436static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2437 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002438 struct nfs4_state *state, struct nfs4_label *ilabel,
2439 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002441 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002443 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444 .iap = sattr,
2445 .server = server,
2446 .bitmask = server->attr_bitmask,
David Quigley1775fd32013-05-22 12:50:42 -04002447 .label = ilabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 };
2449 struct nfs_setattrres res = {
2450 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04002451 .label = olabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452 .server = server,
2453 };
2454 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2456 .rpc_argp = &arg,
2457 .rpc_resp = &res,
2458 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01002460 unsigned long timestamp = jiffies;
Trond Myklebustee3ae842013-04-29 10:35:36 -04002461 fmode_t fmode;
2462 bool truncate;
Trond Myklebust65e43082005-08-16 11:49:44 -04002463 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464
David Quigleyaa9c2662013-05-22 12:50:44 -04002465 arg.bitmask = nfs4_bitmask(server, ilabel);
2466 if (ilabel)
2467 arg.bitmask = nfs4_bitmask(server, olabel);
2468
Trond Myklebust0e574af2005-10-27 22:12:38 -04002469 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470
Trond Myklebustee3ae842013-04-29 10:35:36 -04002471 /* Servers should only apply open mode checks for file size changes */
2472 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2473 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2474
2475 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2476 /* Use that stateid */
Trond Myklebust0418dae12014-03-04 13:48:16 -05002477 } else if (truncate && state != NULL) {
Trond Myklebust2a369152012-08-13 18:54:45 -04002478 struct nfs_lockowner lockowner = {
2479 .l_owner = current->files,
2480 .l_pid = current->tgid,
2481 };
Trond Myklebust0418dae12014-03-04 13:48:16 -05002482 if (!nfs4_valid_open_stateid(state))
2483 return -EBADF;
2484 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2485 &lockowner) == -EIO)
2486 return -EBADF;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00002487 } else
Trond Myklebustf597c532012-03-04 18:13:56 -05002488 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489
Bryan Schumaker7c513052011-03-24 17:12:24 +00002490 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002491 if (status == 0 && state != NULL)
2492 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04002493 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494}
2495
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002496static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2497 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002498 struct nfs4_state *state, struct nfs4_label *ilabel,
2499 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002501 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002502 struct nfs4_exception exception = {
2503 .state = state,
Trond Myklebust3114ea72012-03-07 16:39:06 -05002504 .inode = inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002505 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 int err;
2507 do {
David Quigley1775fd32013-05-22 12:50:42 -04002508 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
Trond Myklebustc1578b72013-08-12 16:58:42 -04002509 trace_nfs4_setattr(inode, err);
Trond Myklebust451146b2012-04-18 16:29:11 -04002510 switch (err) {
2511 case -NFS4ERR_OPENMODE:
Trond Myklebust721ccfb2013-04-29 11:11:58 -04002512 if (!(sattr->ia_valid & ATTR_SIZE)) {
2513 pr_warn_once("NFSv4: server %s is incorrectly "
2514 "applying open mode checks to "
2515 "a SETATTR that is not "
2516 "changing file size.\n",
2517 server->nfs_client->cl_hostname);
2518 }
Trond Myklebust451146b2012-04-18 16:29:11 -04002519 if (state && !(state->state & FMODE_WRITE)) {
2520 err = -EBADF;
2521 if (sattr->ia_valid & ATTR_OPEN)
2522 err = -EACCES;
2523 goto out;
2524 }
2525 }
2526 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 } while (exception.retry);
Trond Myklebust451146b2012-04-18 16:29:11 -04002528out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 return err;
2530}
2531
2532struct nfs4_closedata {
2533 struct inode *inode;
2534 struct nfs4_state *state;
2535 struct nfs_closeargs arg;
2536 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002537 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002538 unsigned long timestamp;
Fred Isamanf7e89172011-01-06 11:36:32 +00002539 bool roc;
2540 u32 roc_barrier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541};
2542
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002543static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07002544{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state_owner *sp = calldata->state->owner;
Al Viro643168c2011-06-22 18:20:23 -04002547 struct super_block *sb = calldata->state->inode->i_sb;
Trond Myklebust95121352005-10-18 14:20:12 -07002548
Fred Isamanf7e89172011-01-06 11:36:32 +00002549 if (calldata->roc)
2550 pnfs_roc_release(calldata->state->inode);
Trond Myklebust95121352005-10-18 14:20:12 -07002551 nfs4_put_open_state(calldata->state);
2552 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07002553 nfs4_put_state_owner(sp);
Trond Myklebust322b2b92013-01-11 16:39:51 -05002554 nfs_sb_deactive(sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002555 kfree(calldata);
2556}
2557
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002558static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002560 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 struct nfs_server *server = NFS_SERVER(calldata->inode);
2563
Chuck Levera3ca5652012-03-01 17:00:40 -05002564 dprintk("%s: begin!\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04002565 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2566 return;
Trond Myklebust42113a72013-08-12 16:19:27 -04002567 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568 /* hmm. we are done with the inode, and in the process of freeing
2569 * the state_owner. we keep this around to process errors
2570 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 switch (task->tk_status) {
2572 case 0:
Fred Isamanf7e89172011-01-06 11:36:32 +00002573 if (calldata->roc)
2574 pnfs_roc_set_barrier(state->inode,
2575 calldata->roc_barrier);
Trond Myklebust226056c2014-02-11 10:41:07 -05002576 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002577 renew_lease(server, calldata->timestamp);
Trond Myklebust226056c2014-02-11 10:41:07 -05002578 goto out_release;
Trond Myklebust69794ad2013-11-20 12:57:19 -05002579 case -NFS4ERR_ADMIN_REVOKED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580 case -NFS4ERR_STALE_STATEID:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002581 case -NFS4ERR_OLD_STATEID:
2582 case -NFS4ERR_BAD_STATEID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583 case -NFS4ERR_EXPIRED:
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002584 if (calldata->arg.fmode == 0)
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002585 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586 default:
Trond Myklebust69794ad2013-11-20 12:57:19 -05002587 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
Trond Myklebust72211db2009-12-15 14:47:36 -05002588 rpc_restart_call_prepare(task);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002589 goto out_release;
2590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591 }
Trond Myklebust226056c2014-02-11 10:41:07 -05002592 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002593out_release:
Trond Myklebust72211db2009-12-15 14:47:36 -05002594 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebust516a6af2005-10-27 22:12:41 -04002595 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Chuck Levera3ca5652012-03-01 17:00:40 -05002596 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597}
2598
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002599static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002601 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07002602 struct nfs4_state *state = calldata->state;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002603 struct inode *inode = calldata->inode;
Trond Myklebust88069f72009-12-08 08:33:16 -05002604 int call_close = 0;
Trond Myklebust95121352005-10-18 14:20:12 -07002605
Chuck Levera3ca5652012-03-01 17:00:40 -05002606 dprintk("%s: begin!\n", __func__);
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002607 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002608 goto out_wait;
Trond Myklebust003707c2007-07-05 18:07:55 -04002609
Trond Myklebust88069f72009-12-08 08:33:16 -05002610 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2611 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002612 spin_lock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04002613 /* Calculate the change in open mode */
Trond Myklebuste7616922006-01-03 09:55:13 +01002614 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04002615 if (state->n_rdonly == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002616 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2617 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2618 calldata->arg.fmode &= ~FMODE_READ;
Trond Myklebust003707c2007-07-05 18:07:55 -04002619 }
2620 if (state->n_wronly == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002621 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2622 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2623 calldata->arg.fmode &= ~FMODE_WRITE;
Trond Myklebust003707c2007-07-05 18:07:55 -04002624 }
Trond Myklebuste7616922006-01-03 09:55:13 +01002625 }
Trond Myklebust5d422302013-03-14 16:57:48 -04002626 if (!nfs4_valid_open_stateid(state))
2627 call_close = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002628 spin_unlock(&state->owner->so_lock);
Trond Myklebust88069f72009-12-08 08:33:16 -05002629
2630 if (!call_close) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002631 /* Note: exit _without_ calling nfs4_close_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002632 goto out_no_action;
Trond Myklebust95121352005-10-18 14:20:12 -07002633 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002634
Fred Isamanf7e89172011-01-06 11:36:32 +00002635 if (calldata->arg.fmode == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
Fred Isamanf7e89172011-01-06 11:36:32 +00002637 if (calldata->roc &&
Andy Adamsonb9536ad2013-04-11 09:28:45 -04002638 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2639 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002640 goto out_wait;
Andy Adamsonb9536ad2013-04-11 09:28:45 -04002641 }
Fred Isamanf7e89172011-01-06 11:36:32 +00002642 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002643
Trond Myklebust516a6af2005-10-27 22:12:41 -04002644 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002645 calldata->timestamp = jiffies;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002646 if (nfs4_setup_sequence(NFS_SERVER(inode),
Trond Myklebust9d12b212012-01-17 22:04:25 -05002647 &calldata->arg.seq_args,
2648 &calldata->res.seq_res,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002649 task) != 0)
2650 nfs_release_seqid(calldata->arg.seqid);
Chuck Levera3ca5652012-03-01 17:00:40 -05002651 dprintk("%s: done!\n", __func__);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002652 return;
2653out_no_action:
2654 task->tk_action = NULL;
2655out_wait:
2656 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657}
2658
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002659static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002660 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002661 .rpc_call_done = nfs4_close_done,
2662 .rpc_release = nfs4_free_closedata,
2663};
2664
Peng Taofe08c542014-07-03 13:05:01 +08002665static bool nfs4_state_has_opener(struct nfs4_state *state)
2666{
2667 /* first check existing openers */
2668 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2669 state->n_rdonly != 0)
2670 return true;
2671
2672 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2673 state->n_wronly != 0)
2674 return true;
2675
2676 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2677 state->n_rdwr != 0)
2678 return true;
2679
2680 return false;
2681}
2682
2683static bool nfs4_roc(struct inode *inode)
2684{
2685 struct nfs_inode *nfsi = NFS_I(inode);
2686 struct nfs_open_context *ctx;
2687 struct nfs4_state *state;
2688
2689 spin_lock(&inode->i_lock);
2690 list_for_each_entry(ctx, &nfsi->open_files, list) {
2691 state = ctx->state;
2692 if (state == NULL)
2693 continue;
2694 if (nfs4_state_has_opener(state)) {
2695 spin_unlock(&inode->i_lock);
2696 return false;
2697 }
2698 }
2699 spin_unlock(&inode->i_lock);
2700
2701 if (nfs4_check_delegation(inode, FMODE_READ))
2702 return false;
2703
2704 return pnfs_roc(inode);
2705}
2706
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707/*
2708 * It is possible for data to be read/written from a mem-mapped file
2709 * after the sys_close call (which hits the vfs layer as a flush).
2710 * This means that we can't safely call nfsv4 close on a file until
2711 * the inode is cleared. This in turn means that we are not good
2712 * NFSv4 citizens - we do not indicate to the server to update the file's
2713 * share state even when we are done with one of the three share
2714 * stateid's in the inode.
2715 *
2716 * NOTE: Caller must be holding the sp->so_owner semaphore!
2717 */
Trond Myklebust1f7977c2012-09-20 20:31:51 -04002718int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002720 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04002722 struct nfs4_state_owner *sp = state->owner;
2723 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2726 .rpc_cred = state->owner->so_cred,
2727 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002728 struct rpc_task_setup task_setup_data = {
2729 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002730 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002731 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05002732 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002733 .flags = RPC_TASK_ASYNC,
2734 };
Trond Myklebust95121352005-10-18 14:20:12 -07002735 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002736
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04002737 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2738 &task_setup_data.rpc_client, &msg);
2739
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002740 calldata = kzalloc(sizeof(*calldata), gfp_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07002742 goto out;
Chuck Levera9c92d62013-08-09 12:48:18 -04002743 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002744 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002746 calldata->arg.fh = NFS_FH(state->inode);
Trond Myklebust003707c2007-07-05 18:07:55 -04002747 calldata->arg.stateid = &state->open_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748 /* Serialization for the sequence id */
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002749 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
Trond Myklebust95121352005-10-18 14:20:12 -07002750 if (calldata->arg.seqid == NULL)
2751 goto out_free_calldata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002752 calldata->arg.fmode = 0;
Trond Myklebusta65318b2009-03-11 14:10:28 -04002753 calldata->arg.bitmask = server->cache_consistency_bitmask;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002754 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04002755 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002756 calldata->res.server = server;
Peng Taofe08c542014-07-03 13:05:01 +08002757 calldata->roc = nfs4_roc(state->inode);
Al Viro643168c2011-06-22 18:20:23 -04002758 nfs_sb_active(calldata->inode->i_sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002759
Trond Myklebust1174dd12010-12-21 10:52:24 -05002760 msg.rpc_argp = &calldata->arg;
2761 msg.rpc_resp = &calldata->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04002762 task_setup_data.callback_data = calldata;
2763 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002764 if (IS_ERR(task))
2765 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002766 status = 0;
2767 if (wait)
2768 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002769 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002770 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07002771out_free_calldata:
2772 kfree(calldata);
2773out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04002774 nfs4_put_open_state(state);
2775 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07002776 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002777}
2778
Trond Myklebust2b484292010-09-17 10:56:51 -04002779static struct inode *
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002780nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2781 int open_flags, struct iattr *attr, int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 struct nfs4_state *state;
David Quigleyaa9c2662013-05-22 12:50:44 -04002784 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2785
2786 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787
Trond Myklebust565277f2007-10-15 18:17:53 -04002788 /* Protect against concurrent sillydeletes */
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002789 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
David Quigleyaa9c2662013-05-22 12:50:44 -04002790
2791 nfs4_label_release_security(label);
2792
Trond Myklebustf46e0bd2010-09-17 10:56:50 -04002793 if (IS_ERR(state))
2794 return ERR_CAST(state);
Trond Myklebust275bb302013-05-29 13:11:28 -04002795 return state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796}
2797
Trond Myklebust1185a552009-12-03 15:54:02 -05002798static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002799{
2800 if (ctx->state == NULL)
2801 return;
2802 if (is_sync)
Al Viro643168c2011-06-22 18:20:23 -04002803 nfs4_close_sync(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002804 else
Al Viro643168c2011-06-22 18:20:23 -04002805 nfs4_close_state(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002806}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002807
Trond Myklebustb944dba2013-11-04 15:20:20 -05002808#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2809#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
J. Bruce Fields999e5682014-06-03 17:33:35 -04002810#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
Trond Myklebustb944dba2013-11-04 15:20:20 -05002811
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2813{
Benny Halevy43652ad2009-04-01 09:21:54 -04002814 struct nfs4_server_caps_arg args = {
2815 .fhandle = fhandle,
2816 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002817 struct nfs4_server_caps_res res = {};
2818 struct rpc_message msg = {
2819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
Benny Halevy43652ad2009-04-01 09:21:54 -04002820 .rpc_argp = &args,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 .rpc_resp = &res,
2822 };
2823 int status;
2824
Bryan Schumaker7c513052011-03-24 17:12:24 +00002825 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002826 if (status == 0) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05002827 /* Sanity check the server answers */
2828 switch (server->nfs_client->cl_minorversion) {
2829 case 0:
2830 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2831 res.attr_bitmask[2] = 0;
2832 break;
2833 case 1:
2834 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2835 break;
2836 case 2:
2837 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2838 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
Trond Myklebust62ab4602009-08-09 15:06:19 -04002840 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2841 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2842 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2843 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
Trond Myklebustb944dba2013-11-04 15:20:20 -05002844 NFS_CAP_CTIME|NFS_CAP_MTIME|
2845 NFS_CAP_SECURITY_LABEL);
Malahal Naineni7dd7d952014-01-23 08:54:55 -06002846 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2847 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848 server->caps |= NFS_CAP_ACLS;
2849 if (res.has_links != 0)
2850 server->caps |= NFS_CAP_HARDLINKS;
2851 if (res.has_symlinks != 0)
2852 server->caps |= NFS_CAP_SYMLINKS;
Trond Myklebust62ab4602009-08-09 15:06:19 -04002853 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2854 server->caps |= NFS_CAP_FILEID;
2855 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2856 server->caps |= NFS_CAP_MODE;
2857 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2858 server->caps |= NFS_CAP_NLINK;
2859 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2860 server->caps |= NFS_CAP_OWNER;
2861 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2862 server->caps |= NFS_CAP_OWNER_GROUP;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2864 server->caps |= NFS_CAP_ATIME;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2866 server->caps |= NFS_CAP_CTIME;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2868 server->caps |= NFS_CAP_MTIME;
David Quigleyaa9c2662013-05-22 12:50:44 -04002869#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2870 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2871 server->caps |= NFS_CAP_SECURITY_LABEL;
2872#endif
2873 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2874 sizeof(server->attr_bitmask));
Trond Myklebustb944dba2013-11-04 15:20:20 -05002875 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
Trond Myklebust62ab4602009-08-09 15:06:19 -04002876
Trond Myklebusta65318b2009-03-11 14:10:28 -04002877 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2878 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2879 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
Trond Myklebustb944dba2013-11-04 15:20:20 -05002880 server->cache_consistency_bitmask[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881 server->acl_bitmask = res.acl_bitmask;
Chuck Lever264e6352012-03-01 17:02:05 -05002882 server->fh_expire_type = res.fh_expire_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002883 }
Andy Adamsoncccef3b2009-04-01 09:22:03 -04002884
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 return status;
2886}
2887
Trond Myklebust55a97592006-06-09 09:34:19 -04002888int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002889{
2890 struct nfs4_exception exception = { };
2891 int err;
2892 do {
2893 err = nfs4_handle_exception(server,
2894 _nfs4_server_capabilities(server, fhandle),
2895 &exception);
2896 } while (exception.retry);
2897 return err;
2898}
2899
2900static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2901 struct nfs_fsinfo *info)
2902{
David Quigleyaa9c2662013-05-22 12:50:44 -04002903 u32 bitmask[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002904 struct nfs4_lookup_root_arg args = {
David Quigleyaa9c2662013-05-22 12:50:44 -04002905 .bitmask = bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906 };
2907 struct nfs4_lookup_res res = {
2908 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04002909 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 .fh = fhandle,
2911 };
2912 struct rpc_message msg = {
2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2914 .rpc_argp = &args,
2915 .rpc_resp = &res,
2916 };
Benny Halevy008f55d2009-04-01 09:22:50 -04002917
David Quigleyaa9c2662013-05-22 12:50:44 -04002918 bitmask[0] = nfs4_fattr_bitmap[0];
2919 bitmask[1] = nfs4_fattr_bitmap[1];
2920 /*
2921 * Process the label in the upcoming getfattr
2922 */
2923 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2924
Trond Myklebust0e574af2005-10-27 22:12:38 -04002925 nfs_fattr_init(info->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00002926 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927}
2928
2929static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_fsinfo *info)
2931{
2932 struct nfs4_exception exception = { };
2933 int err;
2934 do {
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002935 err = _nfs4_lookup_root(server, fhandle, info);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04002936 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002937 switch (err) {
2938 case 0:
2939 case -NFS4ERR_WRONGSEC:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04002940 goto out;
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002941 default:
2942 err = nfs4_handle_exception(server, err, &exception);
2943 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04002945out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946 return err;
2947}
2948
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002949static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2950 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2951{
Trond Myklebustc2190662013-08-26 19:23:04 -04002952 struct rpc_auth_create_args auth_args = {
2953 .pseudoflavor = flavor,
2954 };
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002955 struct rpc_auth *auth;
2956 int ret;
2957
Trond Myklebustc2190662013-08-26 19:23:04 -04002958 auth = rpcauth_create(&auth_args, server->client);
Wei Yongjune8d920c2012-09-21 12:27:41 +08002959 if (IS_ERR(auth)) {
Chuck Lever75bc8822013-03-16 15:55:36 -04002960 ret = -EACCES;
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002961 goto out;
2962 }
2963 ret = nfs4_lookup_root(server, fhandle, info);
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002964out:
2965 return ret;
2966}
2967
Chuck Lever9a744ba2013-03-16 15:56:02 -04002968/*
2969 * Retry pseudoroot lookup with various security flavors. We do this when:
2970 *
2971 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2972 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2973 *
2974 * Returns zero on success, or a negative NFS4ERR value, or a
2975 * negative errno value.
2976 */
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04002977static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04002978 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002979{
Chuck Lever9a744ba2013-03-16 15:56:02 -04002980 /* Per 3530bis 15.33.5 */
2981 static const rpc_authflavor_t flav_array[] = {
2982 RPC_AUTH_GSS_KRB5P,
2983 RPC_AUTH_GSS_KRB5I,
2984 RPC_AUTH_GSS_KRB5,
Chuck Leverc4eafe12013-03-16 15:56:11 -04002985 RPC_AUTH_UNIX, /* courtesy */
Chuck Lever9a744ba2013-03-16 15:56:02 -04002986 RPC_AUTH_NULL,
2987 };
2988 int status = -EPERM;
2989 size_t i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04002991 if (server->auth_info.flavor_len > 0) {
2992 /* try each flavor specified by user */
2993 for (i = 0; i < server->auth_info.flavor_len; i++) {
2994 status = nfs4_lookup_root_sec(server, fhandle, info,
2995 server->auth_info.flavors[i]);
2996 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2997 continue;
2998 break;
2999 }
3000 } else {
3001 /* no flavors specified by user, try default list */
3002 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3003 status = nfs4_lookup_root_sec(server, fhandle, info,
3004 flav_array[i]);
3005 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3006 continue;
3007 break;
3008 }
Bryan Schumaker8f70e952011-03-24 17:12:31 +00003009 }
Chuck Lever9a744ba2013-03-16 15:56:02 -04003010
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04003011 /*
3012 * -EACCESS could mean that the user doesn't have correct permissions
3013 * to access the mount. It could also mean that we tried to mount
3014 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3015 * existing mount programs don't handle -EACCES very well so it should
3016 * be mapped to -EPERM instead.
3017 */
3018 if (status == -EACCES)
3019 status = -EPERM;
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003020 return status;
3021}
3022
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003023static int nfs4_do_find_root_sec(struct nfs_server *server,
3024 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3025{
3026 int mv = server->nfs_client->cl_minorversion;
3027 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3028}
3029
3030/**
3031 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3032 * @server: initialized nfs_server handle
3033 * @fhandle: we fill in the pseudo-fs root file handle
3034 * @info: we fill in an FSINFO struct
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003035 * @auth_probe: probe the auth flavours
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003036 *
3037 * Returns zero on success, or a negative errno.
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003038 */
Bryan Schumaker3028eb22012-05-10 15:07:30 -04003039int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003040 struct nfs_fsinfo *info,
3041 bool auth_probe)
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04003042{
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003043 int status;
3044
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003045 switch (auth_probe) {
3046 case false:
3047 status = nfs4_lookup_root(server, fhandle, info);
3048 if (status != -NFS4ERR_WRONGSEC)
3049 break;
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003050 default:
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003051 status = nfs4_do_find_root_sec(server, fhandle, info);
Trond Myklebust5e6b1992013-09-07 12:58:57 -04003052 }
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003053
Linus Torvalds1da177e2005-04-16 15:20:36 -07003054 if (status == 0)
3055 status = nfs4_server_capabilities(server, fhandle);
3056 if (status == 0)
3057 status = nfs4_do_fsinfo(server, fhandle, info);
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003058
Trond Myklebustc12e87f2006-03-13 21:20:47 -08003059 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003060}
3061
Bryan Schumakerbae36242012-05-10 15:07:31 -04003062static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3063 struct nfs_fsinfo *info)
3064{
3065 int error;
3066 struct nfs_fattr *fattr = info->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003067 struct nfs4_label *label = NULL;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003068
3069 error = nfs4_server_capabilities(server, mntfh);
3070 if (error < 0) {
3071 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3072 return error;
3073 }
3074
David Quigley14c43f72013-05-22 12:50:43 -04003075 label = nfs4_label_alloc(server, GFP_KERNEL);
3076 if (IS_ERR(label))
3077 return PTR_ERR(label);
3078
David Quigley1775fd32013-05-22 12:50:42 -04003079 error = nfs4_proc_getattr(server, mntfh, fattr, label);
Bryan Schumakerbae36242012-05-10 15:07:31 -04003080 if (error < 0) {
3081 dprintk("nfs4_get_root: getattr error = %d\n", -error);
David Quigley14c43f72013-05-22 12:50:43 -04003082 goto err_free_label;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003083 }
3084
3085 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3086 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3087 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3088
David Quigley14c43f72013-05-22 12:50:43 -04003089err_free_label:
3090 nfs4_label_free(label);
3091
Bryan Schumakerbae36242012-05-10 15:07:31 -04003092 return error;
3093}
3094
Manoj Naik6b97fd32006-06-09 09:34:29 -04003095/*
3096 * Get locations and (maybe) other attributes of a referral.
3097 * Note that we'll actually follow the referral later when
3098 * we detect fsid mismatch in inode revalidation
3099 */
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003100static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3101 const struct qstr *name, struct nfs_fattr *fattr,
3102 struct nfs_fh *fhandle)
Manoj Naik6b97fd32006-06-09 09:34:29 -04003103{
3104 int status = -ENOMEM;
3105 struct page *page = NULL;
3106 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003107
3108 page = alloc_page(GFP_KERNEL);
3109 if (page == NULL)
3110 goto out;
3111 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3112 if (locations == NULL)
3113 goto out;
3114
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003115 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003116 if (status != 0)
3117 goto out;
Chuck Lever519ae252013-10-17 14:13:19 -04003118
3119 /*
3120 * If the fsid didn't change, this is a migration event, not a
3121 * referral. Cause us to drop into the exception handler, which
3122 * will kick off migration recovery.
3123 */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003124 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Andy Adamson533eb462011-06-13 18:25:56 -04003125 dprintk("%s: server did not return a different fsid for"
3126 " a referral at %s\n", __func__, name->name);
Chuck Lever519ae252013-10-17 14:13:19 -04003127 status = -NFS4ERR_MOVED;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003128 goto out;
3129 }
Andy Adamson533eb462011-06-13 18:25:56 -04003130 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3131 nfs_fixup_referral_attributes(&locations->fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003132
Andy Adamson533eb462011-06-13 18:25:56 -04003133 /* replace the lookup nfs_fattr with the locations nfs_fattr */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003134 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
Manoj Naik6b97fd32006-06-09 09:34:29 -04003135 memset(fhandle, 0, sizeof(struct nfs_fh));
3136out:
3137 if (page)
3138 __free_page(page);
Davidlohr Bueso5d7ca352010-08-11 12:42:15 -04003139 kfree(locations);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003140 return status;
3141}
3142
David Quigley1775fd32013-05-22 12:50:42 -04003143static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3144 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145{
3146 struct nfs4_getattr_arg args = {
3147 .fh = fhandle,
3148 .bitmask = server->attr_bitmask,
3149 };
3150 struct nfs4_getattr_res res = {
3151 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04003152 .label = label,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153 .server = server,
3154 };
3155 struct rpc_message msg = {
3156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3157 .rpc_argp = &args,
3158 .rpc_resp = &res,
3159 };
David Quigleyaa9c2662013-05-22 12:50:44 -04003160
3161 args.bitmask = nfs4_bitmask(server, label);
3162
Trond Myklebust0e574af2005-10-27 22:12:38 -04003163 nfs_fattr_init(fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003164 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165}
3166
David Quigley1775fd32013-05-22 12:50:42 -04003167static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3168 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003169{
3170 struct nfs4_exception exception = { };
3171 int err;
3172 do {
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003173 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3174 trace_nfs4_getattr(server, fhandle, fattr, err);
3175 err = nfs4_handle_exception(server, err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176 &exception);
3177 } while (exception.retry);
3178 return err;
3179}
3180
3181/*
3182 * The file is not closed if it is opened due to the a request to change
3183 * the size of the file. The open call will not be needed once the
3184 * VFS layer lookup-intents are implemented.
3185 *
3186 * Close is called when the inode is destroyed.
3187 * If we haven't opened the file for O_WRONLY, we
3188 * need to in the size_change case to obtain a stateid.
3189 *
3190 * Got race?
3191 * Because OPEN is always done by name in nfsv4, it is
3192 * possible that we opened a different file by the same
3193 * name. We can recognize this race condition, but we
3194 * can't do anything about it besides returning an error.
3195 *
3196 * This will be fixed with VFS changes (lookup-intent).
3197 */
3198static int
3199nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3200 struct iattr *sattr)
3201{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003202 struct inode *inode = dentry->d_inode;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003203 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05003204 struct nfs4_state *state = NULL;
David Quigley14c43f72013-05-22 12:50:43 -04003205 struct nfs4_label *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206 int status;
3207
Benny Halevy8a1636c2010-07-14 15:43:57 -04003208 if (pnfs_ld_layoutret_on_setattr(inode))
Trond Myklebust24028672013-03-20 13:23:33 -04003209 pnfs_commit_and_return_layout(inode);
Benny Halevy8a1636c2010-07-14 15:43:57 -04003210
Trond Myklebust0e574af2005-10-27 22:12:38 -04003211 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212
Andy Adamson26699402012-05-30 16:12:24 -04003213 /* Deal with open(O_TRUNC) */
3214 if (sattr->ia_valid & ATTR_OPEN)
Nadav Shemercc7936f2013-07-21 17:21:43 +03003215 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
Andy Adamson26699402012-05-30 16:12:24 -04003216
3217 /* Optimization: if the end result is no change, don't RPC */
Nadav Shemercc7936f2013-07-21 17:21:43 +03003218 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
Andy Adamson26699402012-05-30 16:12:24 -04003219 return 0;
3220
Trond Myklebustd5308382005-11-04 15:33:38 -05003221 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003222 if (sattr->ia_valid & ATTR_FILE) {
3223 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003224
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003225 ctx = nfs_file_open_context(sattr->ia_file);
Neil Brown504e5182008-10-16 14:15:16 +11003226 if (ctx) {
3227 cred = ctx->cred;
3228 state = ctx->state;
3229 }
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003230 }
3231
David Quigley14c43f72013-05-22 12:50:43 -04003232 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3233 if (IS_ERR(label))
3234 return PTR_ERR(label);
3235
3236 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
David Quigleyaa9c2662013-05-22 12:50:44 -04003237 if (status == 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -04003238 nfs_setattr_update_inode(inode, sattr);
David Quigleyaa9c2662013-05-22 12:50:44 -04003239 nfs_setsecurity(inode, fattr, label);
3240 }
David Quigley14c43f72013-05-22 12:50:43 -04003241 nfs4_label_free(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242 return status;
3243}
3244
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003245static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3246 const struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003247 struct nfs_fattr *fattr, struct nfs4_label *label)
David Howells2b3de442006-08-22 20:06:09 -04003248{
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003249 struct nfs_server *server = NFS_SERVER(dir);
David Howells2b3de442006-08-22 20:06:09 -04003250 int status;
3251 struct nfs4_lookup_arg args = {
3252 .bitmask = server->attr_bitmask,
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003253 .dir_fh = NFS_FH(dir),
David Howells2b3de442006-08-22 20:06:09 -04003254 .name = name,
3255 };
3256 struct nfs4_lookup_res res = {
3257 .server = server,
3258 .fattr = fattr,
David Quigleyaa9c2662013-05-22 12:50:44 -04003259 .label = label,
David Howells2b3de442006-08-22 20:06:09 -04003260 .fh = fhandle,
3261 };
3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3264 .rpc_argp = &args,
3265 .rpc_resp = &res,
3266 };
3267
David Quigleyaa9c2662013-05-22 12:50:44 -04003268 args.bitmask = nfs4_bitmask(server, label);
3269
David Howells2b3de442006-08-22 20:06:09 -04003270 nfs_fattr_init(fattr);
3271
Linus Torvalds1da177e2005-04-16 15:20:36 -07003272 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003273 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274 dprintk("NFS reply lookup: %d\n", status);
3275 return status;
3276}
3277
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003278static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003279{
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003280 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003281 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003282 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3283 fattr->nlink = 2;
3284}
3285
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003286static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3287 struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003288 struct nfs_fattr *fattr, struct nfs4_label *label)
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003289{
3290 struct nfs4_exception exception = { };
3291 struct rpc_clnt *client = *clnt;
3292 int err;
3293 do {
David Quigley1775fd32013-05-22 12:50:42 -04003294 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003295 trace_nfs4_lookup(dir, name, err);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003296 switch (err) {
3297 case -NFS4ERR_BADNAME:
3298 err = -ENOENT;
3299 goto out;
3300 case -NFS4ERR_MOVED:
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003301 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003302 goto out;
3303 case -NFS4ERR_WRONGSEC:
3304 err = -EPERM;
3305 if (client != *clnt)
3306 goto out;
Andy Adamson66b06862014-06-12 15:02:32 -04003307 client = nfs4_negotiate_security(client, dir, name);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003308 if (IS_ERR(client))
3309 return PTR_ERR(client);
3310
3311 exception.retry = 1;
3312 break;
3313 default:
3314 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3315 }
3316 } while (exception.retry);
3317
3318out:
3319 if (err == 0)
3320 *clnt = client;
3321 else if (client != *clnt)
3322 rpc_shutdown_client(client);
3323
3324 return err;
3325}
3326
Bryan Schumaker80a16b22012-04-27 13:27:46 -04003327static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
David Quigley1775fd32013-05-22 12:50:42 -04003328 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3329 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003330{
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003331 int status;
3332 struct rpc_clnt *client = NFS_CLIENT(dir);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003333
David Quigley1775fd32013-05-22 12:50:42 -04003334 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003335 if (client != NFS_CLIENT(dir)) {
3336 rpc_shutdown_client(client);
3337 nfs_fixup_secinfo_attributes(fattr);
3338 }
3339 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003340}
3341
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003342struct rpc_clnt *
3343nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3344 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3345{
Trond Myklebustb72888c2013-08-07 20:38:07 -04003346 struct rpc_clnt *client = NFS_CLIENT(dir);
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003347 int status;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003348
David Quigley1775fd32013-05-22 12:50:42 -04003349 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003350 if (status < 0)
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003351 return ERR_PTR(status);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003352 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003353}
3354
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3356{
Trond Myklebust76b32992007-08-10 17:45:11 -04003357 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358 struct nfs4_accessargs args = {
3359 .fh = NFS_FH(inode),
Trond Myklebusta4980e72012-01-30 15:43:56 -05003360 .bitmask = server->cache_consistency_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361 };
Trond Myklebust76b32992007-08-10 17:45:11 -04003362 struct nfs4_accessres res = {
3363 .server = server,
Trond Myklebust76b32992007-08-10 17:45:11 -04003364 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003365 struct rpc_message msg = {
3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3367 .rpc_argp = &args,
3368 .rpc_resp = &res,
3369 .rpc_cred = entry->cred,
3370 };
3371 int mode = entry->mask;
David Quigleyaa9c2662013-05-22 12:50:44 -04003372 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373
3374 /*
3375 * Determine which access bits we want to ask for...
3376 */
3377 if (mode & MAY_READ)
3378 args.access |= NFS4_ACCESS_READ;
3379 if (S_ISDIR(inode->i_mode)) {
3380 if (mode & MAY_WRITE)
3381 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3382 if (mode & MAY_EXEC)
3383 args.access |= NFS4_ACCESS_LOOKUP;
3384 } else {
3385 if (mode & MAY_WRITE)
3386 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3387 if (mode & MAY_EXEC)
3388 args.access |= NFS4_ACCESS_EXECUTE;
3389 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003390
3391 res.fattr = nfs_alloc_fattr();
3392 if (res.fattr == NULL)
3393 return -ENOMEM;
3394
Bryan Schumaker7c513052011-03-24 17:12:24 +00003395 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 if (!status) {
Weston Andros Adamson6168f622012-09-10 14:00:46 -04003397 nfs_access_set_mask(entry, res.access);
Trond Myklebustc407d412010-04-16 16:22:48 -04003398 nfs_refresh_inode(inode, res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003400 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401 return status;
3402}
3403
3404static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3405{
3406 struct nfs4_exception exception = { };
3407 int err;
3408 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003409 err = _nfs4_proc_access(inode, entry);
3410 trace_nfs4_access(inode, err);
3411 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003412 &exception);
3413 } while (exception.retry);
3414 return err;
3415}
3416
3417/*
3418 * TODO: For the time being, we don't try to get any attributes
3419 * along with any of the zero-copy operations READ, READDIR,
3420 * READLINK, WRITE.
3421 *
3422 * In the case of the first three, we want to put the GETATTR
3423 * after the read-type operation -- this is because it is hard
3424 * to predict the length of a GETATTR response in v4, and thus
3425 * align the READ data correctly. This means that the GETATTR
3426 * may end up partially falling into the page cache, and we should
3427 * shift it into the 'tail' of the xdr_buf before processing.
3428 * To do this efficiently, we need to know the total length
3429 * of data received, which doesn't seem to be available outside
3430 * of the RPC layer.
3431 *
3432 * In the case of WRITE, we also want to put the GETATTR after
3433 * the operation -- in this case because we want to make sure
Trond Myklebust140150d2012-06-05 15:20:25 -04003434 * we get the post-operation mtime and size.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003435 *
3436 * Both of these changes to the XDR layer would in fact be quite
3437 * minor, but I decided to leave them for a subsequent patch.
3438 */
3439static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3440 unsigned int pgbase, unsigned int pglen)
3441{
3442 struct nfs4_readlink args = {
3443 .fh = NFS_FH(inode),
3444 .pgbase = pgbase,
3445 .pglen = pglen,
3446 .pages = &page,
3447 };
Benny Halevyf50c7002009-04-01 09:21:55 -04003448 struct nfs4_readlink_res res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449 struct rpc_message msg = {
3450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3451 .rpc_argp = &args,
Benny Halevyf50c7002009-04-01 09:21:55 -04003452 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003453 };
3454
Bryan Schumaker7c513052011-03-24 17:12:24 +00003455 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 -07003456}
3457
3458static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3459 unsigned int pgbase, unsigned int pglen)
3460{
3461 struct nfs4_exception exception = { };
3462 int err;
3463 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003464 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3465 trace_nfs4_readlink(inode, err);
3466 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003467 &exception);
3468 } while (exception.retry);
3469 return err;
3470}
3471
Linus Torvalds1da177e2005-04-16 15:20:36 -07003472/*
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003473 * This is just for mknod. open(O_CREAT) will always do ->open_context().
Linus Torvalds1da177e2005-04-16 15:20:36 -07003474 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475static int
3476nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003477 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003478{
David Quigleyaa9c2662013-05-22 12:50:44 -04003479 struct nfs4_label l, *ilabel = NULL;
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003480 struct nfs_open_context *ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003481 struct nfs4_state *state;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04003482 int opened = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483 int status = 0;
3484
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003485 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3486 if (IS_ERR(ctx))
3487 return PTR_ERR(ctx);
3488
David Quigleyaa9c2662013-05-22 12:50:44 -04003489 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3490
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003491 sattr->ia_mode &= ~current_umask();
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04003492 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493 if (IS_ERR(state)) {
3494 status = PTR_ERR(state);
Trond Myklebustc0204fd2010-09-17 10:56:51 -04003495 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003497out:
David Quigleyaa9c2662013-05-22 12:50:44 -04003498 nfs4_label_release_security(ilabel);
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003499 put_nfs_open_context(ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 return status;
3501}
3502
3503static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3504{
Trond Myklebust16e42952005-10-27 22:12:44 -04003505 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003506 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507 .fh = NFS_FH(dir),
Linus Torvalds26fe5752012-05-10 13:14:12 -07003508 .name = *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003510 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04003511 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04003512 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003513 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3515 .rpc_argp = &args,
3516 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003517 };
Trond Myklebust778d2812012-04-27 13:48:19 -04003518 int status;
Trond Myklebustd3468902010-04-16 16:22:50 -04003519
Bryan Schumaker7c513052011-03-24 17:12:24 +00003520 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
Trond Myklebust778d2812012-04-27 13:48:19 -04003521 if (status == 0)
Trond Myklebust16e42952005-10-27 22:12:44 -04003522 update_changeattr(dir, &res.cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003523 return status;
3524}
3525
3526static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3527{
3528 struct nfs4_exception exception = { };
3529 int err;
3530 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003531 err = _nfs4_proc_remove(dir, name);
3532 trace_nfs4_remove(dir, name, err);
3533 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003534 &exception);
3535 } while (exception.retry);
3536 return err;
3537}
3538
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003539static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003540{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003541 struct nfs_server *server = NFS_SERVER(dir);
3542 struct nfs_removeargs *args = msg->rpc_argp;
3543 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003544
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003545 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003546 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Chuck Levera9c92d62013-08-09 12:48:18 -04003547 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04003548
3549 nfs_fattr_init(res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003550}
3551
Bryan Schumaker34e137c2012-03-19 14:54:41 -04003552static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3553{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003554 nfs4_setup_sequence(NFS_SERVER(data->dir),
3555 &data->args.seq_args,
3556 &data->res.seq_res,
3557 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003558}
3559
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003560static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003561{
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003562 struct nfs_unlinkdata *data = task->tk_calldata;
3563 struct nfs_removeres *res = &data->res;
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003564
Trond Myklebust14516c32010-07-31 14:29:06 -04003565 if (!nfs4_sequence_done(task, &res->seq_res))
3566 return 0;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05003567 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003568 return 0;
3569 update_changeattr(dir, &res->cinfo);
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003570 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003571}
3572
Jeff Laytond3d41522010-09-17 17:31:57 -04003573static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3574{
3575 struct nfs_server *server = NFS_SERVER(dir);
3576 struct nfs_renameargs *arg = msg->rpc_argp;
3577 struct nfs_renameres *res = msg->rpc_resp;
3578
3579 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
Jeff Laytond3d41522010-09-17 17:31:57 -04003580 res->server = server;
Chuck Levera9c92d62013-08-09 12:48:18 -04003581 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
Jeff Laytond3d41522010-09-17 17:31:57 -04003582}
3583
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04003584static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3585{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003586 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3587 &data->args.seq_args,
3588 &data->res.seq_res,
3589 task);
Jeff Laytond3d41522010-09-17 17:31:57 -04003590}
3591
3592static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3593 struct inode *new_dir)
3594{
Trond Myklebustfbc6f7c2013-08-12 17:08:26 -04003595 struct nfs_renamedata *data = task->tk_calldata;
3596 struct nfs_renameres *res = &data->res;
Jeff Laytond3d41522010-09-17 17:31:57 -04003597
3598 if (!nfs4_sequence_done(task, &res->seq_res))
3599 return 0;
3600 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3601 return 0;
3602
3603 update_changeattr(old_dir, &res->old_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003604 update_changeattr(new_dir, &res->new_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003605 return 1;
3606}
3607
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3609{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003610 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611 struct nfs4_link_arg arg = {
3612 .fh = NFS_FH(inode),
3613 .dir_fh = NFS_FH(dir),
3614 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003615 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003616 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003617 struct nfs4_link_res res = {
3618 .server = server,
David Quigley1775fd32013-05-22 12:50:42 -04003619 .label = NULL,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003620 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003621 struct rpc_message msg = {
3622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3623 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003624 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625 };
Trond Myklebust136f2622010-04-16 16:22:49 -04003626 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627
Trond Myklebust136f2622010-04-16 16:22:49 -04003628 res.fattr = nfs_alloc_fattr();
Trond Myklebust778d2812012-04-27 13:48:19 -04003629 if (res.fattr == NULL)
Trond Myklebust136f2622010-04-16 16:22:49 -04003630 goto out;
3631
David Quigley14c43f72013-05-22 12:50:43 -04003632 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3633 if (IS_ERR(res.label)) {
3634 status = PTR_ERR(res.label);
3635 goto out;
3636 }
David Quigleyaa9c2662013-05-22 12:50:44 -04003637 arg.bitmask = nfs4_bitmask(server, res.label);
David Quigley14c43f72013-05-22 12:50:43 -04003638
Bryan Schumaker7c513052011-03-24 17:12:24 +00003639 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003640 if (!status) {
3641 update_changeattr(dir, &res.cinfo);
David Quigleyaa9c2662013-05-22 12:50:44 -04003642 status = nfs_post_op_update_inode(inode, res.fattr);
3643 if (!status)
3644 nfs_setsecurity(inode, res.fattr, res.label);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003645 }
David Quigley14c43f72013-05-22 12:50:43 -04003646
3647
3648 nfs4_label_free(res.label);
3649
Trond Myklebust136f2622010-04-16 16:22:49 -04003650out:
Trond Myklebust136f2622010-04-16 16:22:49 -04003651 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003652 return status;
3653}
3654
3655static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3656{
3657 struct nfs4_exception exception = { };
3658 int err;
3659 do {
3660 err = nfs4_handle_exception(NFS_SERVER(inode),
3661 _nfs4_proc_link(inode, dir, name),
3662 &exception);
3663 } while (exception.retry);
3664 return err;
3665}
3666
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003667struct nfs4_createdata {
3668 struct rpc_message msg;
3669 struct nfs4_create_arg arg;
3670 struct nfs4_create_res res;
3671 struct nfs_fh fh;
3672 struct nfs_fattr fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003673 struct nfs4_label *label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003674};
3675
3676static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3677 struct qstr *name, struct iattr *sattr, u32 ftype)
3678{
3679 struct nfs4_createdata *data;
3680
3681 data = kzalloc(sizeof(*data), GFP_KERNEL);
3682 if (data != NULL) {
3683 struct nfs_server *server = NFS_SERVER(dir);
3684
David Quigley14c43f72013-05-22 12:50:43 -04003685 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3686 if (IS_ERR(data->label))
3687 goto out_free;
3688
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003689 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3690 data->msg.rpc_argp = &data->arg;
3691 data->msg.rpc_resp = &data->res;
3692 data->arg.dir_fh = NFS_FH(dir);
3693 data->arg.server = server;
3694 data->arg.name = name;
3695 data->arg.attrs = sattr;
3696 data->arg.ftype = ftype;
David Quigleyaa9c2662013-05-22 12:50:44 -04003697 data->arg.bitmask = nfs4_bitmask(server, data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003698 data->res.server = server;
3699 data->res.fh = &data->fh;
3700 data->res.fattr = &data->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003701 data->res.label = data->label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003702 nfs_fattr_init(data->res.fattr);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003703 }
3704 return data;
David Quigley14c43f72013-05-22 12:50:43 -04003705out_free:
3706 kfree(data);
3707 return NULL;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003708}
3709
3710static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3711{
Bryan Schumaker7c513052011-03-24 17:12:24 +00003712 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
Bryan Schumakere73b83f2011-03-24 17:12:23 +00003713 &data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003714 if (status == 0) {
3715 update_changeattr(dir, &data->res.dir_cinfo);
David Quigley1775fd32013-05-22 12:50:42 -04003716 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003717 }
3718 return status;
3719}
3720
3721static void nfs4_free_createdata(struct nfs4_createdata *data)
3722{
David Quigley14c43f72013-05-22 12:50:43 -04003723 nfs4_label_free(data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003724 kfree(data);
3725}
3726
Chuck Lever4f390c12006-08-22 20:06:22 -04003727static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003728 struct page *page, unsigned int len, struct iattr *sattr,
3729 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003730{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003731 struct nfs4_createdata *data;
3732 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003733
Chuck Lever94a6d752006-08-22 20:06:23 -04003734 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003735 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04003736
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003737 status = -ENOMEM;
3738 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3739 if (data == NULL)
3740 goto out;
3741
3742 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3743 data->arg.u.symlink.pages = &page;
3744 data->arg.u.symlink.len = len;
David Quigley1775fd32013-05-22 12:50:42 -04003745 data->arg.label = label;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003746
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003747 status = nfs4_do_create(dir, dentry, data);
3748
3749 nfs4_free_createdata(data);
3750out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003751 return status;
3752}
3753
Chuck Lever4f390c12006-08-22 20:06:22 -04003754static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04003755 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003756{
3757 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003758 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 int err;
David Quigleyaa9c2662013-05-22 12:50:44 -04003760
3761 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3762
Linus Torvalds1da177e2005-04-16 15:20:36 -07003763 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003764 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3765 trace_nfs4_symlink(dir, &dentry->d_name, err);
3766 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767 &exception);
3768 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003769
3770 nfs4_label_release_security(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003771 return err;
3772}
3773
3774static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003775 struct iattr *sattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003777 struct nfs4_createdata *data;
3778 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003779
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003780 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3781 if (data == NULL)
3782 goto out;
3783
David Quigley1775fd32013-05-22 12:50:42 -04003784 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003785 status = nfs4_do_create(dir, dentry, data);
3786
3787 nfs4_free_createdata(data);
3788out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003789 return status;
3790}
3791
3792static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3793 struct iattr *sattr)
3794{
3795 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003796 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003797 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003798
David Quigleyaa9c2662013-05-22 12:50:44 -04003799 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3800
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003801 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003803 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3804 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3805 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806 &exception);
3807 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003808 nfs4_label_release_security(label);
3809
Linus Torvalds1da177e2005-04-16 15:20:36 -07003810 return err;
3811}
3812
3813static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003814 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815{
3816 struct inode *dir = dentry->d_inode;
3817 struct nfs4_readdir_arg args = {
3818 .fh = NFS_FH(dir),
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003819 .pages = pages,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003820 .pgbase = 0,
3821 .count = count,
Trond Myklebust96d25e52009-11-11 16:15:42 +09003822 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
Bryan Schumaker82f2e542010-10-21 16:33:18 -04003823 .plus = plus,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824 };
3825 struct nfs4_readdir_res res;
3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3828 .rpc_argp = &args,
3829 .rpc_resp = &res,
3830 .rpc_cred = cred,
3831 };
3832 int status;
3833
Al Viro6de14722013-09-16 10:53:17 -04003834 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3835 dentry,
Trond Myklebusteadf4592005-06-22 17:16:39 +00003836 (unsigned long long)cookie);
Trond Myklebustc3f52af2012-09-03 14:56:02 -04003837 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003838 res.pgbase = args.pgbase;
Bryan Schumaker7c513052011-03-24 17:12:24 +00003839 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 -05003840 if (status >= 0) {
Trond Myklebustc3f52af2012-09-03 14:56:02 -04003841 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustac396122010-11-15 20:26:22 -05003842 status += args.pgbase;
3843 }
Trond Myklebustc4812992007-09-28 17:11:45 -04003844
3845 nfs_invalidate_atime(dir);
3846
Harvey Harrison3110ff82008-05-02 13:42:44 -07003847 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848 return status;
3849}
3850
3851static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003852 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003853{
3854 struct nfs4_exception exception = { };
3855 int err;
3856 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003857 err = _nfs4_proc_readdir(dentry, cred, cookie,
3858 pages, count, plus);
3859 trace_nfs4_readdir(dentry->d_inode, err);
3860 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003861 &exception);
3862 } while (exception.retry);
3863 return err;
3864}
3865
3866static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
David Quigleyaa9c2662013-05-22 12:50:44 -04003867 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003869 struct nfs4_createdata *data;
3870 int mode = sattr->ia_mode;
3871 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003872
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003873 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3874 if (data == NULL)
3875 goto out;
3876
Linus Torvalds1da177e2005-04-16 15:20:36 -07003877 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003878 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003880 data->arg.ftype = NF4BLK;
3881 data->arg.u.device.specdata1 = MAJOR(rdev);
3882 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003883 }
3884 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003885 data->arg.ftype = NF4CHR;
3886 data->arg.u.device.specdata1 = MAJOR(rdev);
3887 data->arg.u.device.specdata2 = MINOR(rdev);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04003888 } else if (!S_ISSOCK(mode)) {
3889 status = -EINVAL;
3890 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003891 }
David Quigley1775fd32013-05-22 12:50:42 -04003892
David Quigleyaa9c2662013-05-22 12:50:44 -04003893 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003894 status = nfs4_do_create(dir, dentry, data);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04003895out_free:
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003896 nfs4_free_createdata(data);
3897out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003898 return status;
3899}
3900
3901static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3902 struct iattr *sattr, dev_t rdev)
3903{
3904 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003905 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003906 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003907
David Quigleyaa9c2662013-05-22 12:50:44 -04003908 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3909
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003910 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003911 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003912 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3913 trace_nfs4_mknod(dir, &dentry->d_name, err);
3914 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003915 &exception);
3916 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003917
3918 nfs4_label_release_security(label);
3919
Linus Torvalds1da177e2005-04-16 15:20:36 -07003920 return err;
3921}
3922
3923static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3924 struct nfs_fsstat *fsstat)
3925{
3926 struct nfs4_statfs_arg args = {
3927 .fh = fhandle,
3928 .bitmask = server->attr_bitmask,
3929 };
Benny Halevy24ad1482009-04-01 09:21:56 -04003930 struct nfs4_statfs_res res = {
3931 .fsstat = fsstat,
3932 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003933 struct rpc_message msg = {
3934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3935 .rpc_argp = &args,
Benny Halevy24ad1482009-04-01 09:21:56 -04003936 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003937 };
3938
Trond Myklebust0e574af2005-10-27 22:12:38 -04003939 nfs_fattr_init(fsstat->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003940 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003941}
3942
3943static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3944{
3945 struct nfs4_exception exception = { };
3946 int err;
3947 do {
3948 err = nfs4_handle_exception(server,
3949 _nfs4_proc_statfs(server, fhandle, fsstat),
3950 &exception);
3951 } while (exception.retry);
3952 return err;
3953}
3954
3955static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3956 struct nfs_fsinfo *fsinfo)
3957{
3958 struct nfs4_fsinfo_arg args = {
3959 .fh = fhandle,
3960 .bitmask = server->attr_bitmask,
3961 };
Benny Halevy3dda5e42009-04-01 09:21:57 -04003962 struct nfs4_fsinfo_res res = {
3963 .fsinfo = fsinfo,
3964 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3967 .rpc_argp = &args,
Benny Halevy3dda5e42009-04-01 09:21:57 -04003968 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003969 };
3970
Bryan Schumaker7c513052011-03-24 17:12:24 +00003971 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003972}
3973
3974static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3975{
3976 struct nfs4_exception exception = { };
Chuck Lever83ca7f52013-03-16 15:55:53 -04003977 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003978 int err;
3979
3980 do {
Chuck Lever83ca7f52013-03-16 15:55:53 -04003981 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003982 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
Chuck Lever83ca7f52013-03-16 15:55:53 -04003983 if (err == 0) {
3984 struct nfs_client *clp = server->nfs_client;
3985
3986 spin_lock(&clp->cl_lock);
3987 clp->cl_lease_time = fsinfo->lease_time * HZ;
3988 clp->cl_last_renewal = now;
3989 spin_unlock(&clp->cl_lock);
3990 break;
3991 }
3992 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003993 } while (exception.retry);
3994 return err;
3995}
3996
3997static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3998{
Bryan Schumakere38eb652012-06-20 15:53:40 -04003999 int error;
4000
Trond Myklebust0e574af2005-10-27 22:12:38 -04004001 nfs_fattr_init(fsinfo->fattr);
Bryan Schumakere38eb652012-06-20 15:53:40 -04004002 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
Peng Taodc182542012-08-24 00:27:49 +08004003 if (error == 0) {
4004 /* block layout checks this! */
4005 server->pnfs_blksize = fsinfo->blksize;
Bryan Schumakere38eb652012-06-20 15:53:40 -04004006 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
Peng Taodc182542012-08-24 00:27:49 +08004007 }
Bryan Schumakere38eb652012-06-20 15:53:40 -04004008
4009 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004010}
4011
4012static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4013 struct nfs_pathconf *pathconf)
4014{
4015 struct nfs4_pathconf_arg args = {
4016 .fh = fhandle,
4017 .bitmask = server->attr_bitmask,
4018 };
Benny Halevyd45b2982009-04-01 09:21:58 -04004019 struct nfs4_pathconf_res res = {
4020 .pathconf = pathconf,
4021 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4024 .rpc_argp = &args,
Benny Halevyd45b2982009-04-01 09:21:58 -04004025 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026 };
4027
4028 /* None of the pathconf attributes are mandatory to implement */
4029 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4030 memset(pathconf, 0, sizeof(*pathconf));
4031 return 0;
4032 }
4033
Trond Myklebust0e574af2005-10-27 22:12:38 -04004034 nfs_fattr_init(pathconf->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004035 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004036}
4037
4038static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4039 struct nfs_pathconf *pathconf)
4040{
4041 struct nfs4_exception exception = { };
4042 int err;
4043
4044 do {
4045 err = nfs4_handle_exception(server,
4046 _nfs4_proc_pathconf(server, fhandle, pathconf),
4047 &exception);
4048 } while (exception.retry);
4049 return err;
4050}
4051
Trond Myklebust5521abf2013-03-16 20:54:34 -04004052int nfs4_set_rw_stateid(nfs4_stateid *stateid,
Trond Myklebust9b206142013-03-17 15:52:00 -04004053 const struct nfs_open_context *ctx,
4054 const struct nfs_lock_context *l_ctx,
4055 fmode_t fmode)
4056{
4057 const struct nfs_lockowner *lockowner = NULL;
4058
4059 if (l_ctx != NULL)
4060 lockowner = &l_ctx->lockowner;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004061 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
Trond Myklebust9b206142013-03-17 15:52:00 -04004062}
4063EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4064
Trond Myklebust5521abf2013-03-16 20:54:34 -04004065static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4066 const struct nfs_open_context *ctx,
4067 const struct nfs_lock_context *l_ctx,
4068 fmode_t fmode)
4069{
4070 nfs4_stateid current_stateid;
4071
Trond Myklebuste1253be2014-03-05 08:44:23 -05004072 /* If the current stateid represents a lost lock, then exit */
4073 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4074 return true;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004075 return nfs4_stateid_match(stateid, &current_stateid);
4076}
4077
4078static bool nfs4_error_stateid_expired(int err)
4079{
4080 switch (err) {
4081 case -NFS4ERR_DELEG_REVOKED:
4082 case -NFS4ERR_ADMIN_REVOKED:
4083 case -NFS4ERR_BAD_STATEID:
4084 case -NFS4ERR_STALE_STATEID:
4085 case -NFS4ERR_OLD_STATEID:
4086 case -NFS4ERR_OPENMODE:
4087 case -NFS4ERR_EXPIRED:
4088 return true;
4089 }
4090 return false;
4091}
4092
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004093void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
Benny Halevyd20581a2011-05-22 19:52:03 +03004094{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004095 nfs_invalidate_atime(hdr->inode);
Benny Halevyd20581a2011-05-22 19:52:03 +03004096}
4097
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004098static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004099{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004100 struct nfs_server *server = NFS_SERVER(hdr->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004101
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004102 trace_nfs4_read(hdr, task->tk_status);
4103 if (nfs4_async_handle_error(task, server,
4104 hdr->args.context->state) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004105 rpc_restart_call_prepare(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05004106 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004107 }
Trond Myklebust8850df92007-09-28 17:20:07 -04004108
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004109 __nfs4_read_done_cb(hdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110 if (task->tk_status > 0)
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004111 renew_lease(server, hdr->timestamp);
Trond Myklebustec06c092006-03-20 13:44:27 -05004112 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004113}
4114
Trond Myklebust5521abf2013-03-16 20:54:34 -04004115static bool nfs4_read_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004116 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004117{
4118
4119 if (!nfs4_error_stateid_expired(task->tk_status) ||
4120 nfs4_stateid_is_current(&args->stateid,
4121 args->context,
4122 args->lock_context,
4123 FMODE_READ))
4124 return false;
4125 rpc_restart_call_prepare(task);
4126 return true;
4127}
4128
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004129static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Andy Adamsoncbdabc72011-03-01 01:34:20 +00004130{
4131
4132 dprintk("--> %s\n", __func__);
4133
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004134 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Andy Adamsoncbdabc72011-03-01 01:34:20 +00004135 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004136 if (nfs4_read_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004137 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004138 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4139 nfs4_read_done_cb(task, hdr);
Andy Adamsoncbdabc72011-03-01 01:34:20 +00004140}
4141
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004142static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4143 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004144{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004145 hdr->timestamp = jiffies;
4146 hdr->pgio_done_cb = nfs4_read_done_cb;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004147 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004148 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004149}
4150
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004151static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4152 struct nfs_pgio_header *hdr)
Bryan Schumakerea7c3302012-03-19 14:54:40 -04004153{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004154 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4155 &hdr->args.seq_args,
4156 &hdr->res.seq_res,
Trond Myklebust9b206142013-03-17 15:52:00 -04004157 task))
NeilBrownef1820f2013-09-04 17:04:49 +10004158 return 0;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004159 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4160 hdr->args.lock_context,
4161 hdr->rw_ops->rw_mode) == -EIO)
NeilBrownef1820f2013-09-04 17:04:49 +10004162 return -EIO;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004163 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
NeilBrownef1820f2013-09-04 17:04:49 +10004164 return -EIO;
4165 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004166}
4167
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004168static int nfs4_write_done_cb(struct rpc_task *task,
4169 struct nfs_pgio_header *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004170{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004171 struct inode *inode = hdr->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004172
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004173 trace_nfs4_write(hdr, task->tk_status);
4174 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4175 hdr->args.context->state) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004176 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004177 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004178 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004179 if (task->tk_status >= 0) {
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004180 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4181 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004182 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004183 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004184}
4185
Trond Myklebust5521abf2013-03-16 20:54:34 -04004186static bool nfs4_write_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004187 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004188{
4189
4190 if (!nfs4_error_stateid_expired(task->tk_status) ||
4191 nfs4_stateid_is_current(&args->stateid,
4192 args->context,
4193 args->lock_context,
4194 FMODE_WRITE))
4195 return false;
4196 rpc_restart_call_prepare(task);
4197 return true;
4198}
4199
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004200static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
Fred Isamanb029bc92011-03-03 15:13:42 +00004201{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004202 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
Fred Isamanb029bc92011-03-03 15:13:42 +00004203 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004204 if (nfs4_write_stateid_changed(task, &hdr->args))
Trond Myklebust5521abf2013-03-16 20:54:34 -04004205 return -EAGAIN;
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004206 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4207 nfs4_write_done_cb(task, hdr);
Fred Isamanb029bc92011-03-03 15:13:42 +00004208}
4209
Trond Myklebust5a37f852012-04-28 14:55:16 -04004210static
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004211bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
Fred Isamana69aef12011-03-03 15:13:47 +00004212{
Trond Myklebust5a37f852012-04-28 14:55:16 -04004213 /* Don't request attributes for pNFS or O_DIRECT writes */
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004214 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
Trond Myklebust5a37f852012-04-28 14:55:16 -04004215 return false;
4216 /* Otherwise, request attributes if and only if we don't hold
4217 * a delegation
4218 */
Bryan Schumaker011e2a72012-06-20 15:53:43 -04004219 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
Fred Isamana69aef12011-03-03 15:13:47 +00004220}
Fred Isamana69aef12011-03-03 15:13:47 +00004221
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004222static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4223 struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004224{
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004225 struct nfs_server *server = NFS_SERVER(hdr->inode);
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004226
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004227 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4228 hdr->args.bitmask = NULL;
4229 hdr->res.fattr = NULL;
Fred Isaman7ffd1062011-03-03 15:13:46 +00004230 } else
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004231 hdr->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust5a37f852012-04-28 14:55:16 -04004232
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004233 if (!hdr->pgio_done_cb)
4234 hdr->pgio_done_cb = nfs4_write_done_cb;
4235 hdr->res.server = server;
4236 hdr->timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004237
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004238 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -04004239 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004240}
4241
Fred Isaman0b7c0152012-04-20 14:47:39 -04004242static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4243{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04004244 nfs4_setup_sequence(NFS_SERVER(data->inode),
4245 &data->args.seq_args,
4246 &data->res.seq_res,
4247 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004248}
4249
Fred Isaman0b7c0152012-04-20 14:47:39 -04004250static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004251{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004252 struct inode *inode = data->inode;
Trond Myklebust14516c32010-07-31 14:29:06 -04004253
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004254 trace_nfs4_commit(data, task->tk_status);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004255 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004256 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004257 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004258 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004259 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004260}
4261
Fred Isaman0b7c0152012-04-20 14:47:39 -04004262static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
Fred Isaman5f452432011-03-23 13:27:46 +00004263{
4264 if (!nfs4_sequence_done(task, &data->res.seq_res))
4265 return -EAGAIN;
Fred Isaman0b7c0152012-04-20 14:47:39 -04004266 return data->commit_done_cb(task, data);
Fred Isaman5f452432011-03-23 13:27:46 +00004267}
4268
Fred Isaman0b7c0152012-04-20 14:47:39 -04004269static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270{
Trond Myklebust788e7a82006-03-20 13:44:27 -05004271 struct nfs_server *server = NFS_SERVER(data->inode);
Fred Isaman988b6dc2011-03-23 13:27:52 +00004272
Fred Isaman0b7c0152012-04-20 14:47:39 -04004273 if (data->commit_done_cb == NULL)
4274 data->commit_done_cb = nfs4_commit_done_cb;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004275 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004276 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Chuck Levera9c92d62013-08-09 12:48:18 -04004277 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004278}
4279
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004280struct nfs4_renewdata {
4281 struct nfs_client *client;
4282 unsigned long timestamp;
4283};
4284
Linus Torvalds1da177e2005-04-16 15:20:36 -07004285/*
4286 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4287 * standalone procedure for queueing an asynchronous RENEW.
4288 */
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004289static void nfs4_renew_release(void *calldata)
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004290{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004291 struct nfs4_renewdata *data = calldata;
4292 struct nfs_client *clp = data->client;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004293
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004294 if (atomic_read(&clp->cl_count) > 1)
4295 nfs4_schedule_state_renewal(clp);
4296 nfs_put_client(clp);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004297 kfree(data);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004298}
4299
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004300static void nfs4_renew_done(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004301{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004302 struct nfs4_renewdata *data = calldata;
4303 struct nfs_client *clp = data->client;
4304 unsigned long timestamp = data->timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004305
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004306 trace_nfs4_renew_async(clp, task->tk_status);
Chuck Leverf8aba1e2013-10-17 14:13:53 -04004307 switch (task->tk_status) {
4308 case 0:
4309 break;
4310 case -NFS4ERR_LEASE_MOVED:
4311 nfs4_schedule_lease_moved_recovery(clp);
4312 break;
4313 default:
Trond Myklebust95baa252009-05-26 14:51:00 -04004314 /* Unless we're shutting down, schedule state recovery! */
Trond Myklebust042b60b2011-08-24 15:07:37 -04004315 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4316 return;
4317 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004318 nfs4_schedule_lease_recovery(clp);
Trond Myklebust042b60b2011-08-24 15:07:37 -04004319 return;
4320 }
4321 nfs4_schedule_path_down_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322 }
Trond Myklebust452e9352010-07-31 14:29:06 -04004323 do_renew_lease(clp, timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004324}
4325
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004326static const struct rpc_call_ops nfs4_renew_ops = {
4327 .rpc_call_done = nfs4_renew_done,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004328 .rpc_release = nfs4_renew_release,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004329};
4330
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004331static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332{
4333 struct rpc_message msg = {
4334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4335 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004336 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337 };
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004338 struct nfs4_renewdata *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004339
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004340 if (renew_flags == 0)
4341 return 0;
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004342 if (!atomic_inc_not_zero(&clp->cl_count))
4343 return -EIO;
Trond Myklebustb569ad32011-08-24 15:07:35 -04004344 data = kmalloc(sizeof(*data), GFP_NOFS);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004345 if (data == NULL)
4346 return -ENOMEM;
4347 data->client = clp;
4348 data->timestamp = jiffies;
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004349 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004350 &nfs4_renew_ops, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004351}
4352
Trond Myklebust8534d4e2011-08-24 15:07:37 -04004353static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004354{
4355 struct rpc_message msg = {
4356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4357 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004358 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004359 };
4360 unsigned long now = jiffies;
4361 int status;
4362
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004363 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364 if (status < 0)
4365 return status;
Trond Myklebust452e9352010-07-31 14:29:06 -04004366 do_renew_lease(clp, now);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004367 return 0;
4368}
4369
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004370static inline int nfs4_server_supports_acls(struct nfs_server *server)
4371{
Malahal Naineni7dd7d952014-01-23 08:54:55 -06004372 return server->caps & NFS_CAP_ACLS;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004373}
4374
Trond Myklebust21f498c2012-08-24 10:59:25 -04004375/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4376 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004377 * the stack.
4378 */
Trond Myklebust21f498c2012-08-24 10:59:25 -04004379#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004380
Neil Hormane9e3d722011-03-04 19:26:03 -05004381static int buf_to_pages_noslab(const void *buf, size_t buflen,
4382 struct page **pages, unsigned int *pgbase)
4383{
4384 struct page *newpage, **spages;
4385 int rc = 0;
4386 size_t len;
4387 spages = pages;
4388
4389 do {
Trond Myklebust21f498c2012-08-24 10:59:25 -04004390 len = min_t(size_t, PAGE_SIZE, buflen);
Neil Hormane9e3d722011-03-04 19:26:03 -05004391 newpage = alloc_page(GFP_KERNEL);
4392
4393 if (newpage == NULL)
4394 goto unwind;
4395 memcpy(page_address(newpage), buf, len);
4396 buf += len;
4397 buflen -= len;
4398 *pages++ = newpage;
4399 rc++;
4400 } while (buflen != 0);
4401
4402 return rc;
4403
4404unwind:
4405 for(; rc > 0; rc--)
4406 __free_page(spages[rc-1]);
4407 return -ENOMEM;
4408}
4409
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004410struct nfs4_cached_acl {
4411 int cached;
4412 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00004413 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004414};
4415
4416static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004417{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004418 struct nfs_inode *nfsi = NFS_I(inode);
4419
4420 spin_lock(&inode->i_lock);
4421 kfree(nfsi->nfs4_acl);
4422 nfsi->nfs4_acl = acl;
4423 spin_unlock(&inode->i_lock);
4424}
4425
4426static void nfs4_zap_acl_attr(struct inode *inode)
4427{
4428 nfs4_set_cached_acl(inode, NULL);
4429}
4430
4431static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4432{
4433 struct nfs_inode *nfsi = NFS_I(inode);
4434 struct nfs4_cached_acl *acl;
4435 int ret = -ENOENT;
4436
4437 spin_lock(&inode->i_lock);
4438 acl = nfsi->nfs4_acl;
4439 if (acl == NULL)
4440 goto out;
4441 if (buf == NULL) /* user is just asking for length */
4442 goto out_len;
4443 if (acl->cached == 0)
4444 goto out;
4445 ret = -ERANGE; /* see getxattr(2) man page */
4446 if (acl->len > buflen)
4447 goto out;
4448 memcpy(buf, acl->data, acl->len);
4449out_len:
4450 ret = acl->len;
4451out:
4452 spin_unlock(&inode->i_lock);
4453 return ret;
4454}
4455
Sachin Prabhu5794d212012-04-17 14:36:40 +01004456static 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 +00004457{
4458 struct nfs4_cached_acl *acl;
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004459 size_t buflen = sizeof(*acl) + acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004460
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004461 if (buflen <= PAGE_SIZE) {
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004462 acl = kmalloc(buflen, GFP_KERNEL);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004463 if (acl == NULL)
4464 goto out;
4465 acl->cached = 1;
Sachin Prabhu5794d212012-04-17 14:36:40 +01004466 _copy_from_pages(acl->data, pages, pgbase, acl_len);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004467 } else {
4468 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4469 if (acl == NULL)
4470 goto out;
4471 acl->cached = 0;
4472 }
4473 acl->len = acl_len;
4474out:
4475 nfs4_set_cached_acl(inode, acl);
4476}
4477
Andy Adamsonbf118a32011-12-07 11:55:27 -05004478/*
4479 * The getxattr API returns the required buffer length when called with a
4480 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4481 * the required buf. On a NULL buf, we send a page of data to the server
4482 * guessing that the ACL request can be serviced by a page. If so, we cache
4483 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4484 * the cache. If not so, we throw away the page, and cache the required
4485 * length. The next getxattr call will then produce another round trip to
4486 * the server, this time with the input buf of the required size.
4487 */
Trond Myklebust16b42892006-08-24 12:27:15 -04004488static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004489{
Andy Adamsonbf118a32011-12-07 11:55:27 -05004490 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004491 struct nfs_getaclargs args = {
4492 .fh = NFS_FH(inode),
4493 .acl_pages = pages,
4494 .acl_len = buflen,
4495 };
Benny Halevy663c79b2009-04-01 09:21:59 -04004496 struct nfs_getaclres res = {
4497 .acl_len = buflen,
4498 };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004499 struct rpc_message msg = {
4500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4501 .rpc_argp = &args,
Benny Halevy663c79b2009-04-01 09:21:59 -04004502 .rpc_resp = &res,
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004503 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004504 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4505 int ret = -ENOMEM, i;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004506
Andy Adamsonbf118a32011-12-07 11:55:27 -05004507 /* As long as we're doing a round trip to the server anyway,
4508 * let's be prepared for a page of acl data. */
4509 if (npages == 0)
4510 npages = 1;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004511 if (npages > ARRAY_SIZE(pages))
4512 return -ERANGE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004513
Andy Adamsonbf118a32011-12-07 11:55:27 -05004514 for (i = 0; i < npages; i++) {
4515 pages[i] = alloc_page(GFP_KERNEL);
4516 if (!pages[i])
4517 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004518 }
Sachin Prabhu5a006892012-04-17 14:35:39 +01004519
4520 /* for decoding across pages */
4521 res.acl_scratch = alloc_page(GFP_KERNEL);
4522 if (!res.acl_scratch)
4523 goto out_free;
4524
Andy Adamsonbf118a32011-12-07 11:55:27 -05004525 args.acl_len = npages * PAGE_SIZE;
4526 args.acl_pgbase = 0;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004527
Peng Taode040be2012-01-10 22:42:47 +08004528 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
Andy Adamsonbf118a32011-12-07 11:55:27 -05004529 __func__, buf, buflen, npages, args.acl_len);
4530 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4531 &msg, &args.seq_args, &res.seq_res, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004532 if (ret)
4533 goto out_free;
Andy Adamsonbf118a32011-12-07 11:55:27 -05004534
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004535 /* Handle the case where the passed-in buffer is too short */
4536 if (res.acl_flags & NFS4_ACL_TRUNC) {
4537 /* Did the user only issue a request for the acl length? */
4538 if (buf == NULL)
4539 goto out_ok;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004540 ret = -ERANGE;
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004541 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004542 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004543 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004544 if (buf) {
4545 if (res.acl_len > buflen) {
4546 ret = -ERANGE;
4547 goto out_free;
4548 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004549 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004550 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004551out_ok:
4552 ret = res.acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004553out_free:
Andy Adamsonbf118a32011-12-07 11:55:27 -05004554 for (i = 0; i < npages; i++)
4555 if (pages[i])
4556 __free_page(pages[i]);
Trond Myklebust331818f2012-02-03 18:30:53 -05004557 if (res.acl_scratch)
4558 __free_page(res.acl_scratch);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004559 return ret;
4560}
4561
Trond Myklebust16b42892006-08-24 12:27:15 -04004562static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4563{
4564 struct nfs4_exception exception = { };
4565 ssize_t ret;
4566 do {
4567 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
Trond Myklebustc1578b72013-08-12 16:58:42 -04004568 trace_nfs4_get_acl(inode, ret);
Trond Myklebust16b42892006-08-24 12:27:15 -04004569 if (ret >= 0)
4570 break;
4571 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4572 } while (exception.retry);
4573 return ret;
4574}
4575
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004576static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4577{
4578 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004579 int ret;
4580
4581 if (!nfs4_server_supports_acls(server))
4582 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004583 ret = nfs_revalidate_inode(server, inode);
4584 if (ret < 0)
4585 return ret;
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004586 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4587 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004588 ret = nfs4_read_cached_acl(inode, buf, buflen);
4589 if (ret != -ENOENT)
Andy Adamsonbf118a32011-12-07 11:55:27 -05004590 /* -ENOENT is returned if there is no ACL or if there is an ACL
4591 * but no cached acl data, just the acl length */
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004592 return ret;
4593 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004594}
4595
Trond Myklebust16b42892006-08-24 12:27:15 -04004596static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004597{
4598 struct nfs_server *server = NFS_SERVER(inode);
4599 struct page *pages[NFS4ACL_MAXPAGES];
4600 struct nfs_setaclargs arg = {
4601 .fh = NFS_FH(inode),
4602 .acl_pages = pages,
4603 .acl_len = buflen,
4604 };
Benny Halevy73c403a2009-04-01 09:22:01 -04004605 struct nfs_setaclres res;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004606 struct rpc_message msg = {
4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4608 .rpc_argp = &arg,
Benny Halevy73c403a2009-04-01 09:22:01 -04004609 .rpc_resp = &res,
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004610 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004611 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
Neil Hormane9e3d722011-03-04 19:26:03 -05004612 int ret, i;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004613
4614 if (!nfs4_server_supports_acls(server))
4615 return -EOPNOTSUPP;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004616 if (npages > ARRAY_SIZE(pages))
4617 return -ERANGE;
Neil Hormane9e3d722011-03-04 19:26:03 -05004618 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4619 if (i < 0)
4620 return i;
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04004621 nfs4_inode_return_delegation(inode);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004622 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Neil Hormane9e3d722011-03-04 19:26:03 -05004623
4624 /*
4625 * Free each page after tx, so the only ref left is
4626 * held by the network stack
4627 */
4628 for (; i > 0; i--)
4629 put_page(pages[i-1]);
4630
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004631 /*
4632 * Acl update can result in inode attribute update.
4633 * so mark the attribute cache invalid.
4634 */
4635 spin_lock(&inode->i_lock);
4636 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4637 spin_unlock(&inode->i_lock);
Trond Myklebustf41f7412008-06-11 17:39:04 -04004638 nfs_access_zap_cache(inode);
4639 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004640 return ret;
4641}
4642
Trond Myklebust16b42892006-08-24 12:27:15 -04004643static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4644{
4645 struct nfs4_exception exception = { };
4646 int err;
4647 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004648 err = __nfs4_proc_set_acl(inode, buf, buflen);
4649 trace_nfs4_set_acl(inode, err);
4650 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Trond Myklebust16b42892006-08-24 12:27:15 -04004651 &exception);
4652 } while (exception.retry);
4653 return err;
4654}
4655
David Quigleyaa9c2662013-05-22 12:50:44 -04004656#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4657static int _nfs4_get_security_label(struct inode *inode, void *buf,
4658 size_t buflen)
4659{
4660 struct nfs_server *server = NFS_SERVER(inode);
4661 struct nfs_fattr fattr;
4662 struct nfs4_label label = {0, 0, buflen, buf};
4663
4664 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004665 struct nfs4_getattr_arg arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004666 .fh = NFS_FH(inode),
4667 .bitmask = bitmask,
4668 };
4669 struct nfs4_getattr_res res = {
4670 .fattr = &fattr,
4671 .label = &label,
4672 .server = server,
4673 };
4674 struct rpc_message msg = {
4675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004676 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004677 .rpc_resp = &res,
4678 };
4679 int ret;
4680
4681 nfs_fattr_init(&fattr);
4682
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004683 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
David Quigleyaa9c2662013-05-22 12:50:44 -04004684 if (ret)
4685 return ret;
4686 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4687 return -ENOENT;
4688 if (buflen < label.len)
4689 return -ERANGE;
4690 return 0;
4691}
4692
4693static int nfs4_get_security_label(struct inode *inode, void *buf,
4694 size_t buflen)
4695{
4696 struct nfs4_exception exception = { };
4697 int err;
4698
4699 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4700 return -EOPNOTSUPP;
4701
4702 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004703 err = _nfs4_get_security_label(inode, buf, buflen);
4704 trace_nfs4_get_security_label(inode, err);
4705 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004706 &exception);
4707 } while (exception.retry);
4708 return err;
4709}
4710
4711static int _nfs4_do_set_security_label(struct inode *inode,
4712 struct nfs4_label *ilabel,
4713 struct nfs_fattr *fattr,
4714 struct nfs4_label *olabel)
4715{
4716
4717 struct iattr sattr = {0};
4718 struct nfs_server *server = NFS_SERVER(inode);
4719 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Jeff Layton12207f62013-11-01 10:49:32 -04004720 struct nfs_setattrargs arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004721 .fh = NFS_FH(inode),
4722 .iap = &sattr,
4723 .server = server,
4724 .bitmask = bitmask,
4725 .label = ilabel,
4726 };
4727 struct nfs_setattrres res = {
4728 .fattr = fattr,
4729 .label = olabel,
4730 .server = server,
4731 };
4732 struct rpc_message msg = {
4733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
Jeff Layton12207f62013-11-01 10:49:32 -04004734 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004735 .rpc_resp = &res,
4736 };
4737 int status;
4738
Jeff Layton12207f62013-11-01 10:49:32 -04004739 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
David Quigleyaa9c2662013-05-22 12:50:44 -04004740
Jeff Layton12207f62013-11-01 10:49:32 -04004741 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04004742 if (status)
4743 dprintk("%s failed: %d\n", __func__, status);
4744
4745 return status;
4746}
4747
4748static int nfs4_do_set_security_label(struct inode *inode,
4749 struct nfs4_label *ilabel,
4750 struct nfs_fattr *fattr,
4751 struct nfs4_label *olabel)
4752{
4753 struct nfs4_exception exception = { };
4754 int err;
4755
4756 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004757 err = _nfs4_do_set_security_label(inode, ilabel,
4758 fattr, olabel);
4759 trace_nfs4_set_security_label(inode, err);
4760 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004761 &exception);
4762 } while (exception.retry);
4763 return err;
4764}
4765
4766static int
4767nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4768{
4769 struct nfs4_label ilabel, *olabel = NULL;
4770 struct nfs_fattr fattr;
4771 struct rpc_cred *cred;
4772 struct inode *inode = dentry->d_inode;
4773 int status;
4774
4775 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4776 return -EOPNOTSUPP;
4777
4778 nfs_fattr_init(&fattr);
4779
4780 ilabel.pi = 0;
4781 ilabel.lfs = 0;
4782 ilabel.label = (char *)buf;
4783 ilabel.len = buflen;
4784
4785 cred = rpc_lookup_cred();
4786 if (IS_ERR(cred))
4787 return PTR_ERR(cred);
4788
4789 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4790 if (IS_ERR(olabel)) {
4791 status = -PTR_ERR(olabel);
4792 goto out;
4793 }
4794
4795 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4796 if (status == 0)
4797 nfs_setsecurity(inode, &fattr, olabel);
4798
4799 nfs4_label_free(olabel);
4800out:
4801 put_rpccred(cred);
4802 return status;
4803}
4804#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4805
4806
Linus Torvalds1da177e2005-04-16 15:20:36 -07004807static int
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004808nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004809{
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004810 struct nfs_client *clp = server->nfs_client;
4811
4812 if (task->tk_status >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004813 return 0;
4814 switch(task->tk_status) {
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05004815 case -NFS4ERR_DELEG_REVOKED:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004816 case -NFS4ERR_ADMIN_REVOKED:
4817 case -NFS4ERR_BAD_STATEID:
Trond Myklebust14977482012-03-27 18:31:25 -04004818 if (state == NULL)
4819 break;
4820 nfs_remove_bad_delegation(state->inode);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004821 case -NFS4ERR_OPENMODE:
4822 if (state == NULL)
4823 break;
Trond Myklebust5d422302013-03-14 16:57:48 -04004824 if (nfs4_schedule_stateid_recovery(server, state) < 0)
Chuck Lever9f51a782013-10-17 14:13:13 -04004825 goto recovery_failed;
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004826 goto wait_on_recovery;
Trond Myklebust0ced63d2011-05-26 14:26:35 -04004827 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -04004828 if (state != NULL) {
4829 if (nfs4_schedule_stateid_recovery(server, state) < 0)
Chuck Lever9f51a782013-10-17 14:13:13 -04004830 goto recovery_failed;
Trond Myklebust5d422302013-03-14 16:57:48 -04004831 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004832 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004833 case -NFS4ERR_STALE_CLIENTID:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004834 nfs4_schedule_lease_recovery(clp);
4835 goto wait_on_recovery;
Chuck Lever519ae252013-10-17 14:13:19 -04004836 case -NFS4ERR_MOVED:
4837 if (nfs4_schedule_migration_recovery(server) < 0)
4838 goto recovery_failed;
4839 goto wait_on_recovery;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04004840 case -NFS4ERR_LEASE_MOVED:
4841 nfs4_schedule_lease_moved_recovery(clp);
4842 goto wait_on_recovery;
Andy Adamson4745e312009-04-01 09:22:42 -04004843#if defined(CONFIG_NFS_V4_1)
4844 case -NFS4ERR_BADSESSION:
4845 case -NFS4ERR_BADSLOT:
4846 case -NFS4ERR_BAD_HIGH_SLOT:
4847 case -NFS4ERR_DEADSESSION:
4848 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4849 case -NFS4ERR_SEQ_FALSE_RETRY:
4850 case -NFS4ERR_SEQ_MISORDERED:
4851 dprintk("%s ERROR %d, Reset session\n", __func__,
4852 task->tk_status);
Trond Myklebust9f594792012-05-27 13:02:53 -04004853 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
Andy Adamson4a82fd72013-11-15 16:36:16 -05004854 goto wait_on_recovery;
Andy Adamson4745e312009-04-01 09:22:42 -04004855#endif /* CONFIG_NFS_V4_1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004856 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004857 nfs_inc_server_stats(server, NFSIOS_DELAY);
Chuck Lever006ea732006-03-20 13:44:14 -05004858 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004859 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04004860 case -NFS4ERR_RETRY_UNCACHED_REP:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004861 case -NFS4ERR_OLD_STATEID:
Chuck Leverf1478c12013-10-17 14:13:07 -04004862 goto restart_call;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004863 }
4864 task->tk_status = nfs4_map_errors(task->tk_status);
4865 return 0;
Chuck Lever9f51a782013-10-17 14:13:13 -04004866recovery_failed:
Trond Myklebust5d422302013-03-14 16:57:48 -04004867 task->tk_status = -EIO;
4868 return 0;
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004869wait_on_recovery:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004870 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004871 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4872 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
Chuck Lever519ae252013-10-17 14:13:19 -04004873 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4874 goto recovery_failed;
Chuck Leverf1478c12013-10-17 14:13:07 -04004875restart_call:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004876 task->tk_status = 0;
4877 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004878}
4879
Chuck Leverf0920752012-05-21 22:45:41 -04004880static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4881 nfs4_verifier *bootverf)
Chuck Levercd937102012-03-02 17:14:31 -05004882{
4883 __be32 verf[2];
4884
Chuck Lever2c820d92012-05-21 22:45:33 -04004885 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4886 /* An impossible timestamp guarantees this value
4887 * will never match a generated boot time. */
4888 verf[0] = 0;
Trond Myklebust17f26b12013-08-21 15:48:42 -04004889 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
Chuck Lever2c820d92012-05-21 22:45:33 -04004890 } else {
Chuck Leverf0920752012-05-21 22:45:41 -04004891 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Trond Myklebust17f26b12013-08-21 15:48:42 -04004892 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4893 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
Chuck Lever2c820d92012-05-21 22:45:33 -04004894 }
Chuck Levercd937102012-03-02 17:14:31 -05004895 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4896}
4897
Chuck Levere984a552012-09-14 17:24:21 -04004898static unsigned int
4899nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4900 char *buf, size_t len)
4901{
4902 unsigned int result;
4903
4904 rcu_read_lock();
4905 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4906 clp->cl_ipaddr,
4907 rpc_peeraddr2str(clp->cl_rpcclient,
4908 RPC_DISPLAY_ADDR),
4909 rpc_peeraddr2str(clp->cl_rpcclient,
4910 RPC_DISPLAY_PROTO));
4911 rcu_read_unlock();
4912 return result;
4913}
4914
4915static unsigned int
4916nfs4_init_uniform_client_string(const struct nfs_client *clp,
4917 char *buf, size_t len)
4918{
Trond Myklebust55b59292013-07-24 16:36:35 -04004919 const char *nodename = clp->cl_rpcclient->cl_nodename;
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04004920
4921 if (nfs4_client_id_uniquifier[0] != '\0')
Trond Myklebust55b59292013-07-24 16:36:35 -04004922 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4923 clp->rpc_ops->version,
4924 clp->cl_minorversion,
4925 nfs4_client_id_uniquifier,
4926 nodename);
Chuck Levere984a552012-09-14 17:24:21 -04004927 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4928 clp->rpc_ops->version, clp->cl_minorversion,
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04004929 nodename);
Chuck Levere984a552012-09-14 17:24:21 -04004930}
4931
Chuck Lever706cb8d2014-03-12 12:51:47 -04004932/*
4933 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4934 * services. Advertise one based on the address family of the
4935 * clientaddr.
4936 */
4937static unsigned int
4938nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4939{
4940 if (strchr(clp->cl_ipaddr, ':') != NULL)
4941 return scnprintf(buf, len, "tcp6");
4942 else
4943 return scnprintf(buf, len, "tcp");
4944}
4945
Jeff Laytonf11b2a12014-06-21 20:52:17 -04004946static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4947{
4948 struct nfs4_setclientid *sc = calldata;
4949
4950 if (task->tk_status == 0)
4951 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4952}
4953
4954static const struct rpc_call_ops nfs4_setclientid_ops = {
4955 .rpc_call_done = nfs4_setclientid_done,
4956};
4957
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004958/**
4959 * nfs4_proc_setclientid - Negotiate client ID
4960 * @clp: state data structure
4961 * @program: RPC program for NFSv4 callback service
4962 * @port: IP port number for NFS4 callback service
4963 * @cred: RPC credential to use for this call
4964 * @res: where to place the result
4965 *
4966 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4967 */
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004968int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4969 unsigned short port, struct rpc_cred *cred,
4970 struct nfs4_setclientid_res *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004971{
4972 nfs4_verifier sc_verifier;
4973 struct nfs4_setclientid setclientid = {
4974 .sc_verifier = &sc_verifier,
4975 .sc_prog = program,
Andy Adamsonf4eecd52011-01-06 02:04:30 +00004976 .sc_cb_ident = clp->cl_cb_ident,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004977 };
4978 struct rpc_message msg = {
4979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4980 .rpc_argp = &setclientid,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004981 .rpc_resp = res,
Trond Myklebust286d7d62006-01-03 09:55:26 +01004982 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004983 };
Jeff Laytonf11b2a12014-06-21 20:52:17 -04004984 struct rpc_task *task;
4985 struct rpc_task_setup task_setup_data = {
4986 .rpc_client = clp->cl_rpcclient,
4987 .rpc_message = &msg,
4988 .callback_ops = &nfs4_setclientid_ops,
4989 .callback_data = &setclientid,
4990 .flags = RPC_TASK_TIMEOUT,
4991 };
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004992 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004993
Chuck Leverde734832012-07-11 16:30:50 -04004994 /* nfs_client_id4 */
Chuck Leverf0920752012-05-21 22:45:41 -04004995 nfs4_init_boot_verifier(clp, &sc_verifier);
Chuck Levere984a552012-09-14 17:24:21 -04004996 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4997 setclientid.sc_name_len =
4998 nfs4_init_uniform_client_string(clp,
4999 setclientid.sc_name,
5000 sizeof(setclientid.sc_name));
5001 else
5002 setclientid.sc_name_len =
5003 nfs4_init_nonuniform_client_string(clp,
5004 setclientid.sc_name,
5005 sizeof(setclientid.sc_name));
Chuck Leverde734832012-07-11 16:30:50 -04005006 /* cb_client4 */
Chuck Lever706cb8d2014-03-12 12:51:47 -04005007 setclientid.sc_netid_len =
5008 nfs4_init_callback_netid(clp,
5009 setclientid.sc_netid,
5010 sizeof(setclientid.sc_netid));
Chuck Leverde734832012-07-11 16:30:50 -04005011 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05005012 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07005013 clp->cl_ipaddr, port >> 8, port & 255);
5014
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005015 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5016 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5017 setclientid.sc_name_len, setclientid.sc_name);
Jeff Laytonf11b2a12014-06-21 20:52:17 -04005018 task = rpc_run_task(&task_setup_data);
5019 if (IS_ERR(task)) {
5020 status = PTR_ERR(task);
5021 goto out;
5022 }
5023 status = task->tk_status;
5024 if (setclientid.sc_cred) {
5025 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5026 put_rpccred(setclientid.sc_cred);
5027 }
5028 rpc_put_task(task);
5029out:
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005030 trace_nfs4_setclientid(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005031 dprintk("NFS reply setclientid: %d\n", status);
5032 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005033}
5034
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005035/**
5036 * nfs4_proc_setclientid_confirm - Confirm client ID
5037 * @clp: state data structure
5038 * @res: result of a previous SETCLIENTID
5039 * @cred: RPC credential to use for this call
5040 *
5041 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5042 */
Trond Myklebustfd954ae2011-04-24 14:28:18 -04005043int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005044 struct nfs4_setclientid_res *arg,
5045 struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005046{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005047 struct rpc_message msg = {
5048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04005049 .rpc_argp = arg,
Trond Myklebust286d7d62006-01-03 09:55:26 +01005050 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005051 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005052 int status;
5053
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005054 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5055 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5056 clp->cl_clientid);
Trond Myklebust1bd714f2011-04-24 14:29:33 -04005057 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04005058 trace_nfs4_setclientid_confirm(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04005059 dprintk("NFS reply setclientid_confirm: %d\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005060 return status;
5061}
5062
Trond Myklebustfe650402006-01-03 09:55:18 +01005063struct nfs4_delegreturndata {
5064 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005065 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01005066 struct nfs_fh fh;
5067 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005068 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005069 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01005070 int rpc_status;
Peng Tao039b7562014-07-03 13:05:02 +08005071 struct inode *inode;
5072 bool roc;
5073 u32 roc_barrier;
Trond Myklebustfe650402006-01-03 09:55:18 +01005074};
5075
Trond Myklebustfe650402006-01-03 09:55:18 +01005076static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5077{
5078 struct nfs4_delegreturndata *data = calldata;
Andy Adamson938e1012009-04-01 09:22:28 -04005079
Trond Myklebust14516c32010-07-31 14:29:06 -04005080 if (!nfs4_sequence_done(task, &data->res.seq_res))
5081 return;
Andy Adamson938e1012009-04-01 09:22:28 -04005082
Trond Myklebustca8acf82013-08-13 10:36:56 -04005083 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005084 switch (task->tk_status) {
Ricardo Labiaga79708862009-12-07 09:23:21 -05005085 case 0:
Trond Myklebustfa178f22006-01-03 09:55:38 +01005086 renew_lease(data->res.server, data->timestamp);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005087 case -NFS4ERR_ADMIN_REVOKED:
5088 case -NFS4ERR_DELEG_REVOKED:
5089 case -NFS4ERR_BAD_STATEID:
5090 case -NFS4ERR_OLD_STATEID:
5091 case -NFS4ERR_STALE_STATEID:
5092 case -NFS4ERR_EXPIRED:
5093 task->tk_status = 0;
Peng Tao039b7562014-07-03 13:05:02 +08005094 if (data->roc)
5095 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
Trond Myklebustc97cf602013-11-19 16:34:14 -05005096 break;
Ricardo Labiaga79708862009-12-07 09:23:21 -05005097 default:
5098 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5099 -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005100 rpc_restart_call_prepare(task);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005101 return;
5102 }
5103 }
5104 data->rpc_status = task->tk_status;
Trond Myklebustfe650402006-01-03 09:55:18 +01005105}
5106
5107static void nfs4_delegreturn_release(void *calldata)
5108{
Peng Tao039b7562014-07-03 13:05:02 +08005109 struct nfs4_delegreturndata *data = calldata;
5110
5111 if (data->roc)
5112 pnfs_roc_release(data->inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005113 kfree(calldata);
5114}
5115
Andy Adamson938e1012009-04-01 09:22:28 -04005116static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5117{
5118 struct nfs4_delegreturndata *d_data;
5119
5120 d_data = (struct nfs4_delegreturndata *)data;
5121
Peng Tao039b7562014-07-03 13:05:02 +08005122 if (d_data->roc &&
5123 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5124 return;
5125
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005126 nfs4_setup_sequence(d_data->res.server,
5127 &d_data->args.seq_args,
5128 &d_data->res.seq_res,
5129 task);
Andy Adamson938e1012009-04-01 09:22:28 -04005130}
Andy Adamson938e1012009-04-01 09:22:28 -04005131
Jesper Juhlc8d149f2006-03-20 13:44:07 -05005132static const struct rpc_call_ops nfs4_delegreturn_ops = {
Andy Adamson938e1012009-04-01 09:22:28 -04005133 .rpc_call_prepare = nfs4_delegreturn_prepare,
Trond Myklebustfe650402006-01-03 09:55:18 +01005134 .rpc_call_done = nfs4_delegreturn_done,
5135 .rpc_release = nfs4_delegreturn_release,
5136};
5137
Trond Myklebuste6f81072008-01-24 18:14:34 -05005138static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01005139{
5140 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005141 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005142 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005143 struct rpc_message msg = {
5144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5145 .rpc_cred = cred,
5146 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005147 struct rpc_task_setup task_setup_data = {
5148 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04005149 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005150 .callback_ops = &nfs4_delegreturn_ops,
5151 .flags = RPC_TASK_ASYNC,
5152 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05005153 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01005154
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005155 data = kzalloc(sizeof(*data), GFP_NOFS);
Trond Myklebustfe650402006-01-03 09:55:18 +01005156 if (data == NULL)
5157 return -ENOMEM;
Chuck Levera9c92d62013-08-09 12:48:18 -04005158 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Trond Myklebustfe650402006-01-03 09:55:18 +01005159 data->args.fhandle = &data->fh;
5160 data->args.stateid = &data->stateid;
Trond Myklebust9e907fe2012-04-27 13:48:17 -04005161 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01005162 nfs_copy_fh(&data->fh, NFS_FH(inode));
Trond Myklebustf597c532012-03-04 18:13:56 -05005163 nfs4_stateid_copy(&data->stateid, stateid);
Trond Myklebustfa178f22006-01-03 09:55:38 +01005164 data->res.fattr = &data->fattr;
5165 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005166 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005167 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01005168 data->rpc_status = 0;
Peng Tao039b7562014-07-03 13:05:02 +08005169 data->inode = inode;
5170 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5171 pnfs_roc(inode) : false;
Trond Myklebustfe650402006-01-03 09:55:18 +01005172
Trond Myklebustc970aa82007-07-14 15:39:59 -04005173 task_setup_data.callback_data = data;
Trond Myklebust1174dd12010-12-21 10:52:24 -05005174 msg.rpc_argp = &data->args;
5175 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005176 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005177 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01005178 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005179 if (!issync)
5180 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01005181 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005182 if (status != 0)
5183 goto out;
5184 status = data->rpc_status;
Trond Myklebuste144cbc2012-04-28 16:05:03 -04005185 if (status == 0)
5186 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5187 else
5188 nfs_refresh_inode(inode, &data->fattr);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005189out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005190 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01005191 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005192}
5193
Trond Myklebuste6f81072008-01-24 18:14:34 -05005194int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005195{
5196 struct nfs_server *server = NFS_SERVER(inode);
5197 struct nfs4_exception exception = { };
5198 int err;
5199 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05005200 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Trond Myklebustca8acf82013-08-13 10:36:56 -04005201 trace_nfs4_delegreturn(inode, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005202 switch (err) {
5203 case -NFS4ERR_STALE_STATEID:
5204 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005205 case 0:
5206 return 0;
5207 }
5208 err = nfs4_handle_exception(server, err, &exception);
5209 } while (exception.retry);
5210 return err;
5211}
5212
5213#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5214#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5215
5216/*
5217 * sleep, with exponential backoff, and retry the LOCK operation.
5218 */
5219static unsigned long
5220nfs4_set_lock_task_retry(unsigned long timeout)
5221{
Colin Cross416ad3c2013-05-06 23:50:06 +00005222 freezable_schedule_timeout_killable_unsafe(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005223 timeout <<= 1;
5224 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5225 return NFS4_LOCK_MAXTIMEOUT;
5226 return timeout;
5227}
5228
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5230{
5231 struct inode *inode = state->inode;
5232 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04005233 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005234 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005235 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005236 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005237 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005238 struct nfs_lockt_res res = {
5239 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005240 };
5241 struct rpc_message msg = {
5242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5243 .rpc_argp = &arg,
5244 .rpc_resp = &res,
5245 .rpc_cred = state->owner->so_cred,
5246 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005247 struct nfs4_lock_state *lsp;
5248 int status;
5249
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005250 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005251 status = nfs4_set_lock_state(state, request);
5252 if (status != 0)
5253 goto out;
5254 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005255 arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005256 arg.lock_owner.s_dev = server->s_dev;
Bryan Schumaker7c513052011-03-24 17:12:24 +00005257 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005258 switch (status) {
5259 case 0:
5260 request->fl_type = F_UNLCK;
5261 break;
5262 case -NFS4ERR_DENIED:
5263 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005264 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05005265 request->fl_ops->fl_release_private(request);
Trond Myklebusta6f951d2013-10-01 14:24:58 -04005266 request->fl_ops = NULL;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005267out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005268 return status;
5269}
5270
5271static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5272{
5273 struct nfs4_exception exception = { };
5274 int err;
5275
5276 do {
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005277 err = _nfs4_proc_getlk(state, cmd, request);
5278 trace_nfs4_get_lock(request, state, cmd, err);
5279 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005280 &exception);
5281 } while (exception.retry);
5282 return err;
5283}
5284
5285static int do_vfs_lock(struct file *file, struct file_lock *fl)
5286{
5287 int res = 0;
5288 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5289 case FL_POSIX:
5290 res = posix_lock_file_wait(file, fl);
5291 break;
5292 case FL_FLOCK:
5293 res = flock_lock_file_wait(file, fl);
5294 break;
5295 default:
5296 BUG();
5297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005298 return res;
5299}
5300
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005301struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005302 struct nfs_locku_args arg;
5303 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005304 struct nfs4_lock_state *lsp;
5305 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005306 struct file_lock fl;
5307 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005308 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005309};
5310
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005311static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5312 struct nfs_open_context *ctx,
5313 struct nfs4_lock_state *lsp,
5314 struct nfs_seqid *seqid)
5315{
5316 struct nfs4_unlockdata *p;
5317 struct inode *inode = lsp->ls_state->inode;
5318
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005319 p = kzalloc(sizeof(*p), GFP_NOFS);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005320 if (p == NULL)
5321 return NULL;
5322 p->arg.fh = NFS_FH(inode);
5323 p->arg.fl = &p->fl;
5324 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005325 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005326 p->arg.stateid = &lsp->ls_stateid;
5327 p->lsp = lsp;
5328 atomic_inc(&lsp->ls_count);
5329 /* Ensure we don't close file until we're done freeing locks! */
5330 p->ctx = get_nfs_open_context(ctx);
5331 memcpy(&p->fl, fl, sizeof(p->fl));
5332 p->server = NFS_SERVER(inode);
5333 return p;
5334}
5335
Trond Myklebust06f814a2006-01-03 09:55:07 +01005336static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005337{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005338 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005339 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005340 nfs4_put_lock_state(calldata->lsp);
5341 put_nfs_open_context(calldata->ctx);
5342 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005343}
5344
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005345static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005346{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005347 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005348
Trond Myklebust14516c32010-07-31 14:29:06 -04005349 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5350 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005351 switch (task->tk_status) {
5352 case 0:
Trond Myklebustf597c532012-03-04 18:13:56 -05005353 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5354 &calldata->res.stateid);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005355 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005356 break;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005357 case -NFS4ERR_BAD_STATEID:
5358 case -NFS4ERR_OLD_STATEID:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005359 case -NFS4ERR_STALE_STATEID:
5360 case -NFS4ERR_EXPIRED:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005361 break;
5362 default:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005363 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005364 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005365 }
Trond Myklebust2b1bc302012-10-29 18:53:23 -04005366 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005367}
5368
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005369static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005370{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005371 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005373 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005374 goto out_wait;
Trond Myklebust795a88c2012-09-10 13:26:49 -04005375 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005376 /* Note: exit _without_ running nfs4_locku_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005377 goto out_no_action;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005378 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005379 calldata->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005380 if (nfs4_setup_sequence(calldata->server,
Andy Adamsona8936932009-04-01 09:22:23 -04005381 &calldata->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005382 &calldata->res.seq_res,
5383 task) != 0)
5384 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005385 return;
5386out_no_action:
5387 task->tk_action = NULL;
5388out_wait:
5389 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005390}
5391
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005392static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005393 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005394 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01005395 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005396};
5397
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005398static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5399 struct nfs_open_context *ctx,
5400 struct nfs4_lock_state *lsp,
5401 struct nfs_seqid *seqid)
5402{
5403 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005404 struct rpc_message msg = {
5405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5406 .rpc_cred = ctx->cred,
5407 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005408 struct rpc_task_setup task_setup_data = {
5409 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005410 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005411 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005412 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005413 .flags = RPC_TASK_ASYNC,
5414 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005415
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04005416 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5417 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5418
Frank Filz137d6ac2007-07-09 15:32:29 -07005419 /* Ensure this is an unlock - when canceling a lock, the
5420 * canceled lock is passed in, and it won't be an unlock.
5421 */
5422 fl->fl_type = F_UNLCK;
5423
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005424 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5425 if (data == NULL) {
5426 nfs_free_seqid(seqid);
5427 return ERR_PTR(-ENOMEM);
5428 }
5429
Chuck Levera9c92d62013-08-09 12:48:18 -04005430 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005431 msg.rpc_argp = &data->arg;
5432 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005433 task_setup_data.callback_data = data;
5434 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005435}
5436
Linus Torvalds1da177e2005-04-16 15:20:36 -07005437static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5438{
Trond Myklebust65b62a22013-02-07 10:54:07 -05005439 struct inode *inode = state->inode;
5440 struct nfs4_state_owner *sp = state->owner;
5441 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005442 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005443 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01005444 struct rpc_task *task;
5445 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005446 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005447
Trond Myklebust9b073572006-06-29 16:38:34 -04005448 status = nfs4_set_lock_state(state, request);
5449 /* Unlock _before_ we do the RPC call */
5450 request->fl_flags |= FL_EXISTS;
Trond Myklebust65b62a22013-02-07 10:54:07 -05005451 /* Exclude nfs_delegation_claim_locks() */
5452 mutex_lock(&sp->so_delegreturn_mutex);
5453 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005454 down_read(&nfsi->rwsem);
5455 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5456 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005457 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005458 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005459 }
5460 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005461 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005462 if (status != 0)
5463 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005464 /* Is this a delegated lock? */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005465 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebustc5a2a152013-04-30 12:43:42 -04005466 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5467 goto out;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005468 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
Trond Myklebust9b073572006-06-29 16:38:34 -04005469 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005470 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04005471 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005472 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005473 status = PTR_ERR(task);
5474 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04005475 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005476 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005477 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04005478out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005479 request->fl_flags = fl_flags;
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005480 trace_nfs4_unlock(request, state, F_SETLK, status);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005481 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005482}
5483
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005484struct nfs4_lockdata {
5485 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005486 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005487 struct nfs4_lock_state *lsp;
5488 struct nfs_open_context *ctx;
5489 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005490 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005491 int rpc_status;
5492 int cancelled;
Andy Adamson66179ef2009-04-01 09:22:22 -04005493 struct nfs_server *server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005494};
5495
5496static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005497 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5498 gfp_t gfp_mask)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005499{
5500 struct nfs4_lockdata *p;
5501 struct inode *inode = lsp->ls_state->inode;
5502 struct nfs_server *server = NFS_SERVER(inode);
5503
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005504 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005505 if (p == NULL)
5506 return NULL;
5507
5508 p->arg.fh = NFS_FH(inode);
5509 p->arg.fl = &p->fl;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005510 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005511 if (p->arg.open_seqid == NULL)
5512 goto out_free;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005513 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005514 if (p->arg.lock_seqid == NULL)
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005515 goto out_free_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005516 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04005517 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005518 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005519 p->arg.lock_owner.s_dev = server->s_dev;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005520 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005521 p->lsp = lsp;
Andy Adamson66179ef2009-04-01 09:22:22 -04005522 p->server = server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005523 atomic_inc(&lsp->ls_count);
5524 p->ctx = get_nfs_open_context(ctx);
5525 memcpy(&p->fl, fl, sizeof(p->fl));
5526 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005527out_free_seqid:
5528 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005529out_free:
5530 kfree(p);
5531 return NULL;
5532}
5533
5534static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5535{
5536 struct nfs4_lockdata *data = calldata;
5537 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005538
Harvey Harrison3110ff82008-05-02 13:42:44 -07005539 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005540 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005541 goto out_wait;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005542 /* Do we need to do an open_to_lock_owner? */
5543 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005544 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005545 goto out_release_lock_seqid;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005546 }
Trond Myklebust8e472f32013-04-20 01:30:53 -04005547 data->arg.open_stateid = &state->open_stateid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005548 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005549 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005550 } else
5551 data->arg.new_lock_owner = 0;
Trond Myklebust5d422302013-03-14 16:57:48 -04005552 if (!nfs4_valid_open_stateid(state)) {
5553 data->rpc_status = -EBADF;
5554 task->tk_action = NULL;
5555 goto out_release_open_seqid;
5556 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005557 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005558 if (nfs4_setup_sequence(data->server,
5559 &data->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005560 &data->res.seq_res,
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005561 task) == 0)
Andy Adamson66179ef2009-04-01 09:22:22 -04005562 return;
Trond Myklebust5d422302013-03-14 16:57:48 -04005563out_release_open_seqid:
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005564 nfs_release_seqid(data->arg.open_seqid);
5565out_release_lock_seqid:
5566 nfs_release_seqid(data->arg.lock_seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005567out_wait:
5568 nfs4_sequence_done(task, &data->res.seq_res);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005569 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08005570}
5571
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005572static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5573{
5574 struct nfs4_lockdata *data = calldata;
5575
Harvey Harrison3110ff82008-05-02 13:42:44 -07005576 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005577
Trond Myklebust14516c32010-07-31 14:29:06 -04005578 if (!nfs4_sequence_done(task, &data->res.seq_res))
5579 return;
Andy Adamson66179ef2009-04-01 09:22:22 -04005580
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005581 data->rpc_status = task->tk_status;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005582 if (data->arg.new_lock_owner != 0) {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005583 if (data->rpc_status == 0)
5584 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5585 else
5586 goto out;
5587 }
5588 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05005589 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005590 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
Al Viro3d4ff432011-06-22 18:40:12 -04005591 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005592 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005593out:
Harvey Harrison3110ff82008-05-02 13:42:44 -07005594 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005595}
5596
5597static void nfs4_lock_release(void *calldata)
5598{
5599 struct nfs4_lockdata *data = calldata;
5600
Harvey Harrison3110ff82008-05-02 13:42:44 -07005601 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005602 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005603 if (data->cancelled != 0) {
5604 struct rpc_task *task;
5605 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5606 data->arg.lock_seqid);
5607 if (!IS_ERR(task))
Trond Myklebustbf294b42011-02-21 11:05:41 -08005608 rpc_put_task_async(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005609 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005610 } else
5611 nfs_free_seqid(data->arg.lock_seqid);
5612 nfs4_put_lock_state(data->lsp);
5613 put_nfs_open_context(data->ctx);
5614 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005615 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005616}
5617
5618static const struct rpc_call_ops nfs4_lock_ops = {
5619 .rpc_call_prepare = nfs4_lock_prepare,
5620 .rpc_call_done = nfs4_lock_done,
5621 .rpc_release = nfs4_lock_release,
5622};
5623
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005624static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5625{
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005626 switch (error) {
5627 case -NFS4ERR_ADMIN_REVOKED:
5628 case -NFS4ERR_BAD_STATEID:
Trond Myklebustecac7992011-03-09 16:00:56 -05005629 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005630 if (new_lock_owner != 0 ||
Trond Myklebust795a88c2012-09-10 13:26:49 -04005631 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
Trond Myklebustecac7992011-03-09 16:00:56 -05005632 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005633 break;
5634 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005635 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebustecac7992011-03-09 16:00:56 -05005636 case -NFS4ERR_EXPIRED:
5637 nfs4_schedule_lease_recovery(server->nfs_client);
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005638 };
5639}
5640
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005641static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005642{
5643 struct nfs4_lockdata *data;
5644 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005645 struct rpc_message msg = {
5646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5647 .rpc_cred = state->owner->so_cred,
5648 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005649 struct rpc_task_setup task_setup_data = {
5650 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005651 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005652 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005653 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005654 .flags = RPC_TASK_ASYNC,
5655 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005656 int ret;
5657
Harvey Harrison3110ff82008-05-02 13:42:44 -07005658 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005659 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005660 fl->fl_u.nfs4_fl.owner,
5661 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005662 if (data == NULL)
5663 return -ENOMEM;
5664 if (IS_SETLKW(cmd))
5665 data->arg.block = 1;
Chuck Levera9c92d62013-08-09 12:48:18 -04005666 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005667 msg.rpc_argp = &data->arg;
5668 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005669 task_setup_data.callback_data = data;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005670 if (recovery_type > NFS_LOCK_NEW) {
5671 if (recovery_type == NFS_LOCK_RECLAIM)
5672 data->arg.reclaim = NFS_LOCK_RECLAIM;
5673 nfs4_set_sequence_privileged(&data->arg.seq_args);
5674 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04005675 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005676 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005677 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005678 ret = nfs4_wait_for_completion_rpc_task(task);
5679 if (ret == 0) {
5680 ret = data->rpc_status;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005681 if (ret)
5682 nfs4_handle_setlk_error(data->server, data->lsp,
5683 data->arg.new_lock_owner, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005684 } else
5685 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005686 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005687 dprintk("%s: done, ret = %d!\n", __func__, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005688 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005689}
5690
5691static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5692{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005693 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005694 struct nfs4_exception exception = {
5695 .inode = state->inode,
5696 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005697 int err;
5698
5699 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005700 /* Cache the lock if possible... */
5701 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5702 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005703 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005704 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
Trond Myklebust168667c2010-10-19 19:47:49 -04005705 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00005706 break;
5707 nfs4_handle_exception(server, err, &exception);
5708 } while (exception.retry);
5709 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005710}
5711
5712static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5713{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005714 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005715 struct nfs4_exception exception = {
5716 .inode = state->inode,
5717 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005718 int err;
5719
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005720 err = nfs4_set_lock_state(state, request);
5721 if (err != 0)
5722 return err;
Trond Myklebustf6de7a32013-09-04 10:08:54 -04005723 if (!recover_lost_locks) {
NeilBrownef1820f2013-09-04 17:04:49 +10005724 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5725 return 0;
5726 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005727 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5729 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005730 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005731 trace_nfs4_lock_expired(request, state, F_SETLK, err);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005732 switch (err) {
5733 default:
5734 goto out;
5735 case -NFS4ERR_GRACE:
5736 case -NFS4ERR_DELAY:
5737 nfs4_handle_exception(server, err, &exception);
5738 err = 0;
5739 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005740 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005741out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00005742 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005743}
5744
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005745#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04005746/**
5747 * nfs41_check_expired_locks - possibly free a lock stateid
5748 *
5749 * @state: NFSv4 state for an inode
5750 *
5751 * Returns NFS_OK if recovery for this stateid is now finished.
5752 * Otherwise a negative NFS4ERR value is returned.
5753 */
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005754static int nfs41_check_expired_locks(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005755{
Chuck Levereb64cf92012-07-11 16:30:05 -04005756 int status, ret = -NFS4ERR_BAD_STATEID;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005757 struct nfs4_lock_state *lsp;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005758 struct nfs_server *server = NFS_SERVER(state->inode);
5759
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005760 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
Trond Myklebust795a88c2012-09-10 13:26:49 -04005761 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04005762 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5763
5764 status = nfs41_test_stateid(server,
5765 &lsp->ls_stateid,
5766 cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04005767 trace_nfs4_test_lock_stateid(state, lsp, status);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005768 if (status != NFS_OK) {
Chuck Lever3e60ffd2012-07-11 16:30:14 -04005769 /* Free the stateid unless the server
5770 * informs us the stateid is unrecognized. */
Chuck Lever89af2732012-07-11 16:29:56 -04005771 if (status != -NFS4ERR_BAD_STATEID)
5772 nfs41_free_stateid(server,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04005773 &lsp->ls_stateid,
5774 cred);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005775 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005776 ret = status;
5777 }
5778 }
5779 };
5780
5781 return ret;
5782}
5783
5784static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5785{
5786 int status = NFS_OK;
5787
5788 if (test_bit(LK_STATE_IN_USE, &state->flags))
5789 status = nfs41_check_expired_locks(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04005790 if (status != NFS_OK)
5791 status = nfs4_lock_expired(state, request);
5792 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005793}
5794#endif
5795
Linus Torvalds1da177e2005-04-16 15:20:36 -07005796static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5797{
Trond Myklebust9a99af42013-02-04 20:17:49 -05005798 struct nfs4_state_owner *sp = state->owner;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005799 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005800 unsigned char fl_flags = request->fl_flags;
Trond Myklebust9a99af42013-02-04 20:17:49 -05005801 unsigned int seq;
Trond Myklebust8e469eb2010-01-26 15:42:30 -05005802 int status = -ENOLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005803
Trond Myklebust8e469eb2010-01-26 15:42:30 -05005804 if ((fl_flags & FL_POSIX) &&
5805 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5806 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005807 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005808 status = nfs4_set_lock_state(state, request);
5809 if (status != 0)
5810 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005811 request->fl_flags |= FL_ACCESS;
5812 status = do_vfs_lock(request->fl_file, request);
5813 if (status < 0)
5814 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005815 down_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005816 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust01c3b862006-06-29 16:38:39 -04005817 /* Yes: cache locks! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04005818 /* ...but avoid races with delegation recall... */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005819 request->fl_flags = fl_flags & ~FL_SLEEP;
5820 status = do_vfs_lock(request->fl_file, request);
5821 goto out_unlock;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005822 }
Trond Myklebust9a99af42013-02-04 20:17:49 -05005823 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5824 up_read(&nfsi->rwsem);
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005825 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005826 if (status != 0)
Trond Myklebust9a99af42013-02-04 20:17:49 -05005827 goto out;
5828 down_read(&nfsi->rwsem);
5829 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5830 status = -NFS4ERR_DELAY;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005831 goto out_unlock;
Trond Myklebust9a99af42013-02-04 20:17:49 -05005832 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005833 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04005834 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005835 if (do_vfs_lock(request->fl_file, request) < 0)
Weston Andros Adamsona0308892012-01-26 13:32:23 -05005836 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5837 "manager!\n", __func__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005838out_unlock:
Trond Myklebust19e03c52008-12-23 15:21:44 -05005839 up_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005840out:
5841 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005842 return status;
5843}
5844
5845static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5846{
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05005847 struct nfs4_exception exception = {
5848 .state = state,
Trond Myklebust05ffe242012-04-18 12:20:10 -04005849 .inode = state->inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05005850 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005851 int err;
5852
5853 do {
Trond Myklebust965b5d62009-06-17 13:22:59 -07005854 err = _nfs4_proc_setlk(state, cmd, request);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005855 trace_nfs4_set_lock(request, state, cmd, err);
Trond Myklebust965b5d62009-06-17 13:22:59 -07005856 if (err == -NFS4ERR_DENIED)
5857 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005858 err = nfs4_handle_exception(NFS_SERVER(state->inode),
Trond Myklebust965b5d62009-06-17 13:22:59 -07005859 err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005860 } while (exception.retry);
5861 return err;
5862}
5863
5864static int
5865nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5866{
5867 struct nfs_open_context *ctx;
5868 struct nfs4_state *state;
5869 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5870 int status;
5871
5872 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005873 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005874 state = ctx->state;
5875
5876 if (request->fl_start < 0 || request->fl_end < 0)
5877 return -EINVAL;
5878
Trond Myklebustd9531262009-07-21 19:22:38 -04005879 if (IS_GETLK(cmd)) {
5880 if (state != NULL)
5881 return nfs4_proc_getlk(state, F_GETLK, request);
5882 return 0;
5883 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005884
5885 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5886 return -EINVAL;
5887
Trond Myklebustd9531262009-07-21 19:22:38 -04005888 if (request->fl_type == F_UNLCK) {
5889 if (state != NULL)
5890 return nfs4_proc_unlck(state, cmd, request);
5891 return 0;
5892 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005893
Trond Myklebustd9531262009-07-21 19:22:38 -04005894 if (state == NULL)
5895 return -ENOLCK;
Trond Myklebust55725512012-04-18 12:48:35 -04005896 /*
5897 * Don't rely on the VFS having checked the file open mode,
5898 * since it won't do this for flock() locks.
5899 */
Jeff Laytonf44106e2012-07-23 15:49:56 -04005900 switch (request->fl_type) {
Trond Myklebust55725512012-04-18 12:48:35 -04005901 case F_RDLCK:
5902 if (!(filp->f_mode & FMODE_READ))
5903 return -EBADF;
5904 break;
5905 case F_WRLCK:
5906 if (!(filp->f_mode & FMODE_WRITE))
5907 return -EBADF;
5908 }
5909
Linus Torvalds1da177e2005-04-16 15:20:36 -07005910 do {
5911 status = nfs4_proc_setlk(state, cmd, request);
5912 if ((status != -EAGAIN) || IS_SETLK(cmd))
5913 break;
5914 timeout = nfs4_set_lock_task_retry(timeout);
5915 status = -ERESTARTSYS;
5916 if (signalled())
5917 break;
5918 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005919 return status;
5920}
5921
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04005922int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
Trond Myklebust888e6942005-11-04 15:38:11 -05005923{
5924 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust888e6942005-11-04 15:38:11 -05005925 int err;
5926
5927 err = nfs4_set_lock_state(state, fl);
5928 if (err != 0)
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04005929 return err;
Trond Myklebust4a706fa2013-04-01 14:47:22 -04005930 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
Trond Myklebustdb4f2e62013-04-01 15:56:46 -04005931 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
Trond Myklebust888e6942005-11-04 15:38:11 -05005932}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005933
Trond Myklebustcf470c32012-03-07 13:49:12 -05005934struct nfs_release_lockowner_data {
5935 struct nfs4_lock_state *lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04005936 struct nfs_server *server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05005937 struct nfs_release_lockowner_args args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005938 struct nfs_release_lockowner_res res;
Chuck Lever60ea6812013-10-17 14:13:47 -04005939 unsigned long timestamp;
Trond Myklebustcf470c32012-03-07 13:49:12 -05005940};
5941
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005942static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5943{
5944 struct nfs_release_lockowner_data *data = calldata;
Kinglong Mee5b53dc82014-08-04 16:18:16 +08005945 struct nfs_server *server = data->server;
5946 nfs40_setup_sequence(server, &data->args.seq_args,
5947 &data->res.seq_res, task);
5948 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
Chuck Lever60ea6812013-10-17 14:13:47 -04005949 data->timestamp = jiffies;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005950}
5951
5952static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5953{
5954 struct nfs_release_lockowner_data *data = calldata;
Chuck Lever60ea6812013-10-17 14:13:47 -04005955 struct nfs_server *server = data->server;
5956
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005957 nfs40_sequence_done(task, &data->res.seq_res);
Chuck Lever60ea6812013-10-17 14:13:47 -04005958
5959 switch (task->tk_status) {
5960 case 0:
5961 renew_lease(server, data->timestamp);
5962 break;
5963 case -NFS4ERR_STALE_CLIENTID:
5964 case -NFS4ERR_EXPIRED:
Kinglong Mee5b53dc82014-08-04 16:18:16 +08005965 nfs4_schedule_lease_recovery(server->nfs_client);
5966 break;
Chuck Lever60ea6812013-10-17 14:13:47 -04005967 case -NFS4ERR_LEASE_MOVED:
5968 case -NFS4ERR_DELAY:
5969 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5970 rpc_restart_call_prepare(task);
5971 }
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005972}
5973
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005974static void nfs4_release_lockowner_release(void *calldata)
5975{
Trond Myklebustcf470c32012-03-07 13:49:12 -05005976 struct nfs_release_lockowner_data *data = calldata;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04005977 nfs4_free_lock_state(data->server, data->lsp);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005978 kfree(calldata);
5979}
5980
Trond Myklebust17280172012-03-11 13:11:00 -04005981static const struct rpc_call_ops nfs4_release_lockowner_ops = {
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005982 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5983 .rpc_call_done = nfs4_release_lockowner_done,
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005984 .rpc_release = nfs4_release_lockowner_release,
5985};
5986
Jeff Laytonf1cdae82014-05-01 06:28:47 -04005987static void
5988nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005989{
Trond Myklebustcf470c32012-03-07 13:49:12 -05005990 struct nfs_release_lockowner_data *data;
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005991 struct rpc_message msg = {
5992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5993 };
5994
5995 if (server->nfs_client->cl_mvops->minor_version != 0)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04005996 return;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005997
Trond Myklebustcf470c32012-03-07 13:49:12 -05005998 data = kmalloc(sizeof(*data), GFP_NOFS);
5999 if (!data)
Jeff Laytonf1cdae82014-05-01 06:28:47 -04006000 return;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006001 data->lsp = lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04006002 data->server = server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05006003 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6004 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6005 data->args.lock_owner.s_dev = server->s_dev;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04006006
Trond Myklebustcf470c32012-03-07 13:49:12 -05006007 msg.rpc_argp = &data->args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08006008 msg.rpc_resp = &data->res;
6009 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebustcf470c32012-03-07 13:49:12 -05006010 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04006011}
6012
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006013#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6014
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006015static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6016 const void *buf, size_t buflen,
6017 int flags, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006018{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006019 if (strcmp(key, "") != 0)
6020 return -EINVAL;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00006021
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006022 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006023}
6024
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006025static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6026 void *buf, size_t buflen, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006027{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006028 if (strcmp(key, "") != 0)
6029 return -EINVAL;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006030
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006031 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006032}
6033
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006034static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6035 size_t list_len, const char *name,
6036 size_t name_len, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006037{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006038 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006039
J. Bruce Fields096455a2006-03-20 23:23:42 -05006040 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6041 return 0;
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00006042
6043 if (list && len <= list_len)
6044 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00006045 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00006046}
6047
David Quigleyc9bccef2013-05-22 12:50:45 -04006048#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6049static inline int nfs4_server_supports_labels(struct nfs_server *server)
6050{
6051 return server->caps & NFS_CAP_SECURITY_LABEL;
6052}
6053
6054static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6055 const void *buf, size_t buflen,
6056 int flags, int type)
6057{
6058 if (security_ismaclabel(key))
6059 return nfs4_set_security_label(dentry, buf, buflen);
6060
6061 return -EOPNOTSUPP;
6062}
6063
6064static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6065 void *buf, size_t buflen, int type)
6066{
6067 if (security_ismaclabel(key))
6068 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6069 return -EOPNOTSUPP;
6070}
6071
6072static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6073 size_t list_len, const char *name,
6074 size_t name_len, int type)
6075{
6076 size_t len = 0;
6077
6078 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6079 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6080 if (list && len <= list_len)
6081 security_inode_listsecurity(dentry->d_inode, list, len);
6082 }
6083 return len;
6084}
6085
6086static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6087 .prefix = XATTR_SECURITY_PREFIX,
6088 .list = nfs4_xattr_list_nfs4_label,
6089 .get = nfs4_xattr_get_nfs4_label,
6090 .set = nfs4_xattr_set_nfs4_label,
6091};
6092#endif
6093
6094
Andy Adamson533eb462011-06-13 18:25:56 -04006095/*
6096 * nfs_fhget will use either the mounted_on_fileid or the fileid
6097 */
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006098static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6099{
Andy Adamson533eb462011-06-13 18:25:56 -04006100 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6101 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6102 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Chuck Lever81934dd2012-03-01 17:01:57 -05006103 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006104 return;
6105
6106 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Chuck Lever81934dd2012-03-01 17:01:57 -05006107 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
Trond Myklebust69aaaae2009-03-11 14:10:28 -04006108 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6109 fattr->nlink = 2;
6110}
6111
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006112static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6113 const struct qstr *name,
6114 struct nfs4_fs_locations *fs_locations,
6115 struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04006116{
6117 struct nfs_server *server = NFS_SERVER(dir);
David Quigleya09df2c2013-05-22 12:50:41 -04006118 u32 bitmask[3] = {
Manoj Naik361e6242006-06-09 09:34:24 -04006119 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006120 };
6121 struct nfs4_fs_locations_arg args = {
6122 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05006123 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006124 .page = page,
6125 .bitmask = bitmask,
6126 };
Benny Halevy22958462009-04-01 09:22:02 -04006127 struct nfs4_fs_locations_res res = {
6128 .fs_locations = fs_locations,
6129 };
Trond Myklebust683b57b2006-06-09 09:34:22 -04006130 struct rpc_message msg = {
6131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6132 .rpc_argp = &args,
Benny Halevy22958462009-04-01 09:22:02 -04006133 .rpc_resp = &res,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006134 };
6135 int status;
6136
Harvey Harrison3110ff82008-05-02 13:42:44 -07006137 dprintk("%s: start\n", __func__);
Andy Adamson533eb462011-06-13 18:25:56 -04006138
6139 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6140 * is not supported */
6141 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6142 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6143 else
6144 bitmask[0] |= FATTR4_WORD0_FILEID;
6145
Trond Myklebustc228fd32007-01-13 02:28:11 -05006146 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006147 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04006148 fs_locations->nlocations = 0;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006149 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -07006150 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006151 return status;
6152}
6153
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006154int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6155 const struct qstr *name,
6156 struct nfs4_fs_locations *fs_locations,
6157 struct page *page)
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006158{
6159 struct nfs4_exception exception = { };
6160 int err;
6161 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006162 err = _nfs4_proc_fs_locations(client, dir, name,
6163 fs_locations, page);
6164 trace_nfs4_get_fs_locations(dir, name, err);
6165 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006166 &exception);
6167 } while (exception.retry);
6168 return err;
6169}
6170
Chuck Leverb03d7352013-10-17 14:12:50 -04006171/*
6172 * This operation also signals the server that this client is
6173 * performing migration recovery. The server can stop returning
6174 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6175 * appended to this compound to identify the client ID which is
6176 * performing recovery.
6177 */
6178static int _nfs40_proc_get_locations(struct inode *inode,
6179 struct nfs4_fs_locations *locations,
6180 struct page *page, struct rpc_cred *cred)
6181{
6182 struct nfs_server *server = NFS_SERVER(inode);
6183 struct rpc_clnt *clnt = server->client;
6184 u32 bitmask[2] = {
6185 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6186 };
6187 struct nfs4_fs_locations_arg args = {
6188 .clientid = server->nfs_client->cl_clientid,
6189 .fh = NFS_FH(inode),
6190 .page = page,
6191 .bitmask = bitmask,
6192 .migration = 1, /* skip LOOKUP */
6193 .renew = 1, /* append RENEW */
6194 };
6195 struct nfs4_fs_locations_res res = {
6196 .fs_locations = locations,
6197 .migration = 1,
6198 .renew = 1,
6199 };
6200 struct rpc_message msg = {
6201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6202 .rpc_argp = &args,
6203 .rpc_resp = &res,
6204 .rpc_cred = cred,
6205 };
6206 unsigned long now = jiffies;
6207 int status;
6208
6209 nfs_fattr_init(&locations->fattr);
6210 locations->server = server;
6211 locations->nlocations = 0;
6212
6213 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6214 nfs4_set_sequence_privileged(&args.seq_args);
6215 status = nfs4_call_sync_sequence(clnt, server, &msg,
6216 &args.seq_args, &res.seq_res);
6217 if (status)
6218 return status;
6219
6220 renew_lease(server, now);
6221 return 0;
6222}
6223
6224#ifdef CONFIG_NFS_V4_1
6225
6226/*
6227 * This operation also signals the server that this client is
6228 * performing migration recovery. The server can stop asserting
6229 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6230 * performing this operation is identified in the SEQUENCE
6231 * operation in this compound.
6232 *
6233 * When the client supports GETATTR(fs_locations_info), it can
6234 * be plumbed in here.
6235 */
6236static int _nfs41_proc_get_locations(struct inode *inode,
6237 struct nfs4_fs_locations *locations,
6238 struct page *page, struct rpc_cred *cred)
6239{
6240 struct nfs_server *server = NFS_SERVER(inode);
6241 struct rpc_clnt *clnt = server->client;
6242 u32 bitmask[2] = {
6243 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6244 };
6245 struct nfs4_fs_locations_arg args = {
6246 .fh = NFS_FH(inode),
6247 .page = page,
6248 .bitmask = bitmask,
6249 .migration = 1, /* skip LOOKUP */
6250 };
6251 struct nfs4_fs_locations_res res = {
6252 .fs_locations = locations,
6253 .migration = 1,
6254 };
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6257 .rpc_argp = &args,
6258 .rpc_resp = &res,
6259 .rpc_cred = cred,
6260 };
6261 int status;
6262
6263 nfs_fattr_init(&locations->fattr);
6264 locations->server = server;
6265 locations->nlocations = 0;
6266
6267 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6268 nfs4_set_sequence_privileged(&args.seq_args);
6269 status = nfs4_call_sync_sequence(clnt, server, &msg,
6270 &args.seq_args, &res.seq_res);
6271 if (status == NFS4_OK &&
6272 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6273 status = -NFS4ERR_LEASE_MOVED;
6274 return status;
6275}
6276
6277#endif /* CONFIG_NFS_V4_1 */
6278
6279/**
6280 * nfs4_proc_get_locations - discover locations for a migrated FSID
6281 * @inode: inode on FSID that is migrating
6282 * @locations: result of query
6283 * @page: buffer
6284 * @cred: credential to use for this operation
6285 *
6286 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6287 * operation failed, or a negative errno if a local error occurred.
6288 *
6289 * On success, "locations" is filled in, but if the server has
6290 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6291 * asserted.
6292 *
6293 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6294 * from this client that require migration recovery.
6295 */
6296int nfs4_proc_get_locations(struct inode *inode,
6297 struct nfs4_fs_locations *locations,
6298 struct page *page, struct rpc_cred *cred)
6299{
6300 struct nfs_server *server = NFS_SERVER(inode);
6301 struct nfs_client *clp = server->nfs_client;
6302 const struct nfs4_mig_recovery_ops *ops =
6303 clp->cl_mvops->mig_recovery_ops;
6304 struct nfs4_exception exception = { };
6305 int status;
6306
6307 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6308 (unsigned long long)server->fsid.major,
6309 (unsigned long long)server->fsid.minor,
6310 clp->cl_hostname);
6311 nfs_display_fhandle(NFS_FH(inode), __func__);
6312
6313 do {
6314 status = ops->get_locations(inode, locations, page, cred);
6315 if (status != -NFS4ERR_DELAY)
6316 break;
6317 nfs4_handle_exception(server, status, &exception);
6318 } while (exception.retry);
6319 return status;
6320}
6321
Chuck Lever44c99932013-10-17 14:13:30 -04006322/*
6323 * This operation also signals the server that this client is
6324 * performing "lease moved" recovery. The server can stop
6325 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6326 * is appended to this compound to identify the client ID which is
6327 * performing recovery.
6328 */
6329static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6330{
6331 struct nfs_server *server = NFS_SERVER(inode);
6332 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6333 struct rpc_clnt *clnt = server->client;
6334 struct nfs4_fsid_present_arg args = {
6335 .fh = NFS_FH(inode),
6336 .clientid = clp->cl_clientid,
6337 .renew = 1, /* append RENEW */
6338 };
6339 struct nfs4_fsid_present_res res = {
6340 .renew = 1,
6341 };
6342 struct rpc_message msg = {
6343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6344 .rpc_argp = &args,
6345 .rpc_resp = &res,
6346 .rpc_cred = cred,
6347 };
6348 unsigned long now = jiffies;
6349 int status;
6350
6351 res.fh = nfs_alloc_fhandle();
6352 if (res.fh == NULL)
6353 return -ENOMEM;
6354
6355 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6356 nfs4_set_sequence_privileged(&args.seq_args);
6357 status = nfs4_call_sync_sequence(clnt, server, &msg,
6358 &args.seq_args, &res.seq_res);
6359 nfs_free_fhandle(res.fh);
6360 if (status)
6361 return status;
6362
6363 do_renew_lease(clp, now);
6364 return 0;
6365}
6366
6367#ifdef CONFIG_NFS_V4_1
6368
6369/*
6370 * This operation also signals the server that this client is
6371 * performing "lease moved" recovery. The server can stop asserting
6372 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6373 * this operation is identified in the SEQUENCE operation in this
6374 * compound.
6375 */
6376static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6377{
6378 struct nfs_server *server = NFS_SERVER(inode);
6379 struct rpc_clnt *clnt = server->client;
6380 struct nfs4_fsid_present_arg args = {
6381 .fh = NFS_FH(inode),
6382 };
6383 struct nfs4_fsid_present_res res = {
6384 };
6385 struct rpc_message msg = {
6386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6387 .rpc_argp = &args,
6388 .rpc_resp = &res,
6389 .rpc_cred = cred,
6390 };
6391 int status;
6392
6393 res.fh = nfs_alloc_fhandle();
6394 if (res.fh == NULL)
6395 return -ENOMEM;
6396
6397 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6398 nfs4_set_sequence_privileged(&args.seq_args);
6399 status = nfs4_call_sync_sequence(clnt, server, &msg,
6400 &args.seq_args, &res.seq_res);
6401 nfs_free_fhandle(res.fh);
6402 if (status == NFS4_OK &&
6403 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6404 status = -NFS4ERR_LEASE_MOVED;
6405 return status;
6406}
6407
6408#endif /* CONFIG_NFS_V4_1 */
6409
6410/**
6411 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6412 * @inode: inode on FSID to check
6413 * @cred: credential to use for this operation
6414 *
6415 * Server indicates whether the FSID is present, moved, or not
6416 * recognized. This operation is necessary to clear a LEASE_MOVED
6417 * condition for this client ID.
6418 *
6419 * Returns NFS4_OK if the FSID is present on this server,
6420 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6421 * NFS4ERR code if some error occurred on the server, or a
6422 * negative errno if a local failure occurred.
6423 */
6424int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6425{
6426 struct nfs_server *server = NFS_SERVER(inode);
6427 struct nfs_client *clp = server->nfs_client;
6428 const struct nfs4_mig_recovery_ops *ops =
6429 clp->cl_mvops->mig_recovery_ops;
6430 struct nfs4_exception exception = { };
6431 int status;
6432
6433 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6434 (unsigned long long)server->fsid.major,
6435 (unsigned long long)server->fsid.minor,
6436 clp->cl_hostname);
6437 nfs_display_fhandle(NFS_FH(inode), __func__);
6438
6439 do {
6440 status = ops->fsid_present(inode, cred);
6441 if (status != -NFS4ERR_DELAY)
6442 break;
6443 nfs4_handle_exception(server, status, &exception);
6444 } while (exception.retry);
6445 return status;
6446}
6447
Andy Adamson5ec16a82013-08-08 10:57:55 -04006448/**
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006449 * If 'use_integrity' is true and the state managment nfs_client
6450 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6451 * and the machine credential as per RFC3530bis and RFC5661 Security
6452 * Considerations sections. Otherwise, just use the user cred with the
6453 * filesystem's rpc_client.
Andy Adamson5ec16a82013-08-08 10:57:55 -04006454 */
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006455static 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 +00006456{
6457 int status;
6458 struct nfs4_secinfo_arg args = {
6459 .dir_fh = NFS_FH(dir),
6460 .name = name,
6461 };
6462 struct nfs4_secinfo_res res = {
6463 .flavors = flavors,
6464 };
6465 struct rpc_message msg = {
6466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6467 .rpc_argp = &args,
6468 .rpc_resp = &res,
6469 };
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006470 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006471 struct rpc_cred *cred = NULL;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006472
6473 if (use_integrity) {
6474 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006475 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6476 msg.rpc_cred = cred;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006477 }
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006478
6479 dprintk("NFS call secinfo %s\n", name->name);
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006480
6481 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6482 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6483
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006484 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6485 &res.seq_res, 0);
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006486 dprintk("NFS reply secinfo: %d\n", status);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006487
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006488 if (cred)
6489 put_rpccred(cred);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006490
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006491 return status;
6492}
6493
Bryan Schumaker72de53e2012-04-27 13:27:40 -04006494int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6495 struct nfs4_secinfo_flavors *flavors)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006496{
6497 struct nfs4_exception exception = { };
6498 int err;
6499 do {
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006500 err = -NFS4ERR_WRONGSEC;
6501
6502 /* try to use integrity protection with machine cred */
6503 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6504 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6505
6506 /*
6507 * if unable to use integrity protection, or SECINFO with
6508 * integrity protection returns NFS4ERR_WRONGSEC (which is
6509 * disallowed by spec, but exists in deployed servers) use
6510 * the current filesystem's rpc_client and the user cred.
6511 */
6512 if (err == -NFS4ERR_WRONGSEC)
6513 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6514
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006515 trace_nfs4_secinfo(dir, name, err);
6516 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006517 &exception);
6518 } while (exception.retry);
6519 return err;
6520}
6521
Andy Adamson557134a2009-04-01 09:21:53 -04006522#ifdef CONFIG_NFS_V4_1
Benny Halevy99fe60d2009-04-01 09:22:29 -04006523/*
Andy Adamson357f54d2010-12-14 10:11:57 -05006524 * Check the exchange flags returned by the server for invalid flags, having
6525 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6526 * DS flags set.
6527 */
6528static int nfs4_check_cl_exchange_flags(u32 flags)
6529{
6530 if (flags & ~EXCHGID4_FLAG_MASK_R)
6531 goto out_inval;
6532 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6533 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6534 goto out_inval;
6535 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6536 goto out_inval;
6537 return NFS_OK;
6538out_inval:
6539 return -NFS4ERR_INVAL;
6540}
6541
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006542static bool
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006543nfs41_same_server_scope(struct nfs41_server_scope *a,
6544 struct nfs41_server_scope *b)
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006545{
6546 if (a->server_scope_sz == b->server_scope_sz &&
6547 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6548 return true;
6549
6550 return false;
6551}
6552
Andy Adamson357f54d2010-12-14 10:11:57 -05006553/*
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006554 * nfs4_proc_bind_conn_to_session()
6555 *
6556 * The 4.1 client currently uses the same TCP connection for the
6557 * fore and backchannel.
6558 */
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006559int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006560{
6561 int status;
6562 struct nfs41_bind_conn_to_session_res res;
6563 struct rpc_message msg = {
6564 .rpc_proc =
6565 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6566 .rpc_argp = clp,
6567 .rpc_resp = &res,
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006568 .rpc_cred = cred,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006569 };
6570
6571 dprintk("--> %s\n", __func__);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006572
6573 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6574 if (unlikely(res.session == NULL)) {
6575 status = -ENOMEM;
6576 goto out;
6577 }
6578
6579 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006580 trace_nfs4_bind_conn_to_session(clp, status);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006581 if (status == 0) {
6582 if (memcmp(res.session->sess_id.data,
6583 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6584 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6585 status = -EIO;
6586 goto out_session;
6587 }
6588 if (res.dir != NFS4_CDFS4_BOTH) {
6589 dprintk("NFS: %s: Unexpected direction from server\n",
6590 __func__);
6591 status = -EIO;
6592 goto out_session;
6593 }
6594 if (res.use_conn_in_rdma_mode) {
6595 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6596 __func__);
6597 status = -EIO;
6598 goto out_session;
6599 }
6600 }
6601out_session:
6602 kfree(res.session);
6603out:
6604 dprintk("<-- %s status= %d\n", __func__, status);
6605 return status;
6606}
6607
6608/*
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006609 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6610 * and operations we'd like to see to enable certain features in the allow map
Benny Halevy99fe60d2009-04-01 09:22:29 -04006611 */
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006612static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6613 .how = SP4_MACH_CRED,
6614 .enforce.u.words = {
6615 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6616 1 << (OP_EXCHANGE_ID - 32) |
6617 1 << (OP_CREATE_SESSION - 32) |
6618 1 << (OP_DESTROY_SESSION - 32) |
6619 1 << (OP_DESTROY_CLIENTID - 32)
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006620 },
6621 .allow.u.words = {
6622 [0] = 1 << (OP_CLOSE) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006623 1 << (OP_LOCKU) |
6624 1 << (OP_COMMIT),
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006625 [1] = 1 << (OP_SECINFO - 32) |
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006626 1 << (OP_SECINFO_NO_NAME - 32) |
6627 1 << (OP_TEST_STATEID - 32) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006628 1 << (OP_FREE_STATEID - 32) |
6629 1 << (OP_WRITE - 32)
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006630 }
6631};
6632
6633/*
6634 * Select the state protection mode for client `clp' given the server results
6635 * from exchange_id in `sp'.
6636 *
6637 * Returns 0 on success, negative errno otherwise.
6638 */
6639static int nfs4_sp4_select_mode(struct nfs_client *clp,
6640 struct nfs41_state_protection *sp)
6641{
6642 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6643 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6644 1 << (OP_EXCHANGE_ID - 32) |
6645 1 << (OP_CREATE_SESSION - 32) |
6646 1 << (OP_DESTROY_SESSION - 32) |
6647 1 << (OP_DESTROY_CLIENTID - 32)
6648 };
6649 unsigned int i;
6650
6651 if (sp->how == SP4_MACH_CRED) {
6652 /* Print state protect result */
6653 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6654 for (i = 0; i <= LAST_NFS4_OP; i++) {
6655 if (test_bit(i, sp->enforce.u.longs))
6656 dfprintk(MOUNT, " enforce op %d\n", i);
6657 if (test_bit(i, sp->allow.u.longs))
6658 dfprintk(MOUNT, " allow op %d\n", i);
6659 }
6660
6661 /* make sure nothing is on enforce list that isn't supported */
6662 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6663 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6664 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6665 return -EINVAL;
6666 }
6667 }
6668
6669 /*
6670 * Minimal mode - state operations are allowed to use machine
6671 * credential. Note this already happens by default, so the
6672 * client doesn't have to do anything more than the negotiation.
6673 *
6674 * NOTE: we don't care if EXCHANGE_ID is in the list -
6675 * we're already using the machine cred for exchange_id
6676 * and will never use a different cred.
6677 */
6678 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6679 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6680 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6681 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6682 dfprintk(MOUNT, "sp4_mach_cred:\n");
6683 dfprintk(MOUNT, " minimal mode enabled\n");
6684 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6685 } else {
6686 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6687 return -EINVAL;
6688 }
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006689
6690 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6691 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6692 dfprintk(MOUNT, " cleanup mode enabled\n");
6693 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6694 }
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006695
6696 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6697 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6698 dfprintk(MOUNT, " secinfo mode enabled\n");
6699 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6700 }
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006701
6702 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6703 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " stateid mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6706 }
Weston Andros Adamson8c21c622013-08-13 16:37:37 -04006707
6708 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6709 dfprintk(MOUNT, " write mode enabled\n");
6710 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6711 }
6712
6713 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6714 dfprintk(MOUNT, " commit mode enabled\n");
6715 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6716 }
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006717 }
6718
6719 return 0;
6720}
6721
6722/*
6723 * _nfs4_proc_exchange_id()
6724 *
6725 * Wrapper for EXCHANGE_ID operation.
6726 */
6727static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6728 u32 sp4_how)
Benny Halevy99fe60d2009-04-01 09:22:29 -04006729{
6730 nfs4_verifier verifier;
6731 struct nfs41_exchange_id_args args = {
Chuck Levercd937102012-03-02 17:14:31 -05006732 .verifier = &verifier,
Benny Halevy99fe60d2009-04-01 09:22:29 -04006733 .client = clp,
Chuck Levercd3fade2013-10-17 14:14:04 -04006734#ifdef CONFIG_NFS_V4_1_MIGRATION
Trond Myklebust4f0b4292013-05-20 12:24:03 -04006735 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
Chuck Levercd3fade2013-10-17 14:14:04 -04006736 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6737 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6738#else
6739 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6740 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6741#endif
Benny Halevy99fe60d2009-04-01 09:22:29 -04006742 };
6743 struct nfs41_exchange_id_res res = {
Trond Myklebust32b01312012-05-26 13:41:04 -04006744 0
Benny Halevy99fe60d2009-04-01 09:22:29 -04006745 };
6746 int status;
6747 struct rpc_message msg = {
6748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6749 .rpc_argp = &args,
6750 .rpc_resp = &res,
6751 .rpc_cred = cred,
6752 };
Benny Halevy99fe60d2009-04-01 09:22:29 -04006753
Chuck Leverf0920752012-05-21 22:45:41 -04006754 nfs4_init_boot_verifier(clp, &verifier);
Chuck Levere984a552012-09-14 17:24:21 -04006755 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6756 sizeof(args.id));
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006757 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6758 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6759 args.id_len, args.id);
Benny Halevy99fe60d2009-04-01 09:22:29 -04006760
Chuck Leveracdeb692012-05-21 22:46:16 -04006761 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006762 GFP_NOFS);
Chuck Leveracdeb692012-05-21 22:46:16 -04006763 if (unlikely(res.server_owner == NULL)) {
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006764 status = -ENOMEM;
6765 goto out;
6766 }
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006767
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006768 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006769 GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04006770 if (unlikely(res.server_scope == NULL)) {
Benny Halevy99fe60d2009-04-01 09:22:29 -04006771 status = -ENOMEM;
Chuck Leveracdeb692012-05-21 22:46:16 -04006772 goto out_server_owner;
Benny Halevy99fe60d2009-04-01 09:22:29 -04006773 }
6774
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006775 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04006776 if (unlikely(res.impl_id == NULL)) {
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006777 status = -ENOMEM;
6778 goto out_server_scope;
6779 }
6780
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006781 switch (sp4_how) {
6782 case SP4_NONE:
6783 args.state_protect.how = SP4_NONE;
6784 break;
6785
6786 case SP4_MACH_CRED:
6787 args.state_protect = nfs4_sp4_mach_cred_request;
6788 break;
6789
6790 default:
6791 /* unsupported! */
6792 WARN_ON_ONCE(1);
6793 status = -EINVAL;
6794 goto out_server_scope;
6795 }
6796
Trond Myklebust1bd714f2011-04-24 14:29:33 -04006797 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006798 trace_nfs4_exchange_id(clp, status);
Chuck Lever177313f2012-05-21 22:44:58 -04006799 if (status == 0)
Trond Myklebust32b01312012-05-26 13:41:04 -04006800 status = nfs4_check_cl_exchange_flags(res.flags);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006801
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006802 if (status == 0)
6803 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6804
Chuck Lever177313f2012-05-21 22:44:58 -04006805 if (status == 0) {
Trond Myklebust32b01312012-05-26 13:41:04 -04006806 clp->cl_clientid = res.clientid;
6807 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6808 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6809 clp->cl_seqid = res.seqid;
6810
Chuck Leveracdeb692012-05-21 22:46:16 -04006811 kfree(clp->cl_serverowner);
6812 clp->cl_serverowner = res.server_owner;
6813 res.server_owner = NULL;
Chuck Leveracdeb692012-05-21 22:46:16 -04006814
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006815 /* use the most recent implementation id */
Chuck Lever59155542012-05-21 22:44:41 -04006816 kfree(clp->cl_implid);
6817 clp->cl_implid = res.impl_id;
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006818
Chuck Lever177313f2012-05-21 22:44:58 -04006819 if (clp->cl_serverscope != NULL &&
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006820 !nfs41_same_server_scope(clp->cl_serverscope,
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006821 res.server_scope)) {
6822 dprintk("%s: server_scope mismatch detected\n",
6823 __func__);
6824 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006825 kfree(clp->cl_serverscope);
6826 clp->cl_serverscope = NULL;
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006827 }
6828
Chuck Lever177313f2012-05-21 22:44:58 -04006829 if (clp->cl_serverscope == NULL) {
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006830 clp->cl_serverscope = res.server_scope;
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006831 goto out;
6832 }
Trond Myklebust32b01312012-05-26 13:41:04 -04006833 } else
6834 kfree(res.impl_id);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006835
Chuck Leveracdeb692012-05-21 22:46:16 -04006836out_server_owner:
6837 kfree(res.server_owner);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006838out_server_scope:
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006839 kfree(res.server_scope);
6840out:
Chuck Lever177313f2012-05-21 22:44:58 -04006841 if (clp->cl_implid != NULL)
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006842 dprintk("NFS reply exchange_id: Server Implementation ID: "
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006843 "domain: %s, name: %s, date: %llu,%u\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006844 clp->cl_implid->domain, clp->cl_implid->name,
Chuck Lever59155542012-05-21 22:44:41 -04006845 clp->cl_implid->date.seconds,
6846 clp->cl_implid->date.nseconds);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006847 dprintk("NFS reply exchange_id: %d\n", status);
Benny Halevy99fe60d2009-04-01 09:22:29 -04006848 return status;
6849}
6850
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006851/*
6852 * nfs4_proc_exchange_id()
6853 *
6854 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6855 *
6856 * Since the clientid has expired, all compounds using sessions
6857 * associated with the stale clientid will be returning
6858 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6859 * be in some phase of session reset.
6860 *
6861 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6862 */
6863int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6864{
6865 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6866 int status;
6867
6868 /* try SP4_MACH_CRED if krb5i/p */
6869 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6870 authflavor == RPC_AUTH_GSS_KRB5P) {
6871 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6872 if (!status)
6873 return 0;
6874 }
6875
6876 /* try SP4_NONE */
6877 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6878}
6879
Trond Myklebust66245532012-05-25 17:18:09 -04006880static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6881 struct rpc_cred *cred)
6882{
6883 struct rpc_message msg = {
6884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6885 .rpc_argp = clp,
6886 .rpc_cred = cred,
6887 };
6888 int status;
6889
6890 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006891 trace_nfs4_destroy_clientid(clp, status);
Trond Myklebust66245532012-05-25 17:18:09 -04006892 if (status)
Trond Myklebust02c67522012-06-07 13:45:53 -04006893 dprintk("NFS: Got error %d from the server %s on "
Trond Myklebust66245532012-05-25 17:18:09 -04006894 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6895 return status;
6896}
6897
6898static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6899 struct rpc_cred *cred)
6900{
6901 unsigned int loop;
6902 int ret;
6903
6904 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6905 ret = _nfs4_proc_destroy_clientid(clp, cred);
6906 switch (ret) {
6907 case -NFS4ERR_DELAY:
6908 case -NFS4ERR_CLIENTID_BUSY:
6909 ssleep(1);
6910 break;
6911 default:
6912 return ret;
6913 }
6914 }
6915 return 0;
6916}
6917
6918int nfs4_destroy_clientid(struct nfs_client *clp)
6919{
6920 struct rpc_cred *cred;
6921 int ret = 0;
6922
6923 if (clp->cl_mvops->minor_version < 1)
6924 goto out;
6925 if (clp->cl_exchange_flags == 0)
6926 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -04006927 if (clp->cl_preserve_clid)
6928 goto out;
Chuck Lever73d8bde2013-07-24 12:28:37 -04006929 cred = nfs4_get_clid_cred(clp);
Trond Myklebust66245532012-05-25 17:18:09 -04006930 ret = nfs4_proc_destroy_clientid(clp, cred);
6931 if (cred)
6932 put_rpccred(cred);
6933 switch (ret) {
6934 case 0:
6935 case -NFS4ERR_STALE_CLIENTID:
6936 clp->cl_exchange_flags = 0;
6937 }
6938out:
6939 return ret;
6940}
6941
Andy Adamson2050f0c2009-04-01 09:22:30 -04006942struct nfs4_get_lease_time_data {
6943 struct nfs4_get_lease_time_args *args;
6944 struct nfs4_get_lease_time_res *res;
6945 struct nfs_client *clp;
6946};
6947
6948static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6949 void *calldata)
6950{
Andy Adamson2050f0c2009-04-01 09:22:30 -04006951 struct nfs4_get_lease_time_data *data =
6952 (struct nfs4_get_lease_time_data *)calldata;
6953
6954 dprintk("--> %s\n", __func__);
6955 /* just setup sequence, do not trigger session recovery
6956 since we're invoked within one */
Trond Myklebustd9afbd12012-10-22 20:28:44 -04006957 nfs41_setup_sequence(data->clp->cl_session,
6958 &data->args->la_seq_args,
6959 &data->res->lr_seq_res,
6960 task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04006961 dprintk("<-- %s\n", __func__);
6962}
6963
6964/*
6965 * Called from nfs4_state_manager thread for session setup, so don't recover
6966 * from sequence operation or clientid errors.
6967 */
6968static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6969{
6970 struct nfs4_get_lease_time_data *data =
6971 (struct nfs4_get_lease_time_data *)calldata;
6972
6973 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04006974 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6975 return;
Andy Adamson2050f0c2009-04-01 09:22:30 -04006976 switch (task->tk_status) {
6977 case -NFS4ERR_DELAY:
6978 case -NFS4ERR_GRACE:
6979 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6980 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6981 task->tk_status = 0;
Andy Adamsona8a4ae32011-05-03 13:43:03 -04006982 /* fall through */
6983 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustd00c5d42011-10-19 12:17:29 -07006984 rpc_restart_call_prepare(task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04006985 return;
6986 }
Andy Adamson2050f0c2009-04-01 09:22:30 -04006987 dprintk("<-- %s\n", __func__);
6988}
6989
Trond Myklebust17280172012-03-11 13:11:00 -04006990static const struct rpc_call_ops nfs4_get_lease_time_ops = {
Andy Adamson2050f0c2009-04-01 09:22:30 -04006991 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6992 .rpc_call_done = nfs4_get_lease_time_done,
6993};
6994
6995int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6996{
6997 struct rpc_task *task;
6998 struct nfs4_get_lease_time_args args;
6999 struct nfs4_get_lease_time_res res = {
7000 .lr_fsinfo = fsinfo,
7001 };
7002 struct nfs4_get_lease_time_data data = {
7003 .args = &args,
7004 .res = &res,
7005 .clp = clp,
7006 };
7007 struct rpc_message msg = {
7008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7009 .rpc_argp = &args,
7010 .rpc_resp = &res,
7011 };
7012 struct rpc_task_setup task_setup = {
7013 .rpc_client = clp->cl_rpcclient,
7014 .rpc_message = &msg,
7015 .callback_ops = &nfs4_get_lease_time_ops,
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007016 .callback_data = &data,
7017 .flags = RPC_TASK_TIMEOUT,
Andy Adamson2050f0c2009-04-01 09:22:30 -04007018 };
7019 int status;
7020
Chuck Levera9c92d62013-08-09 12:48:18 -04007021 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007022 nfs4_set_sequence_privileged(&args.la_seq_args);
Andy Adamson2050f0c2009-04-01 09:22:30 -04007023 dprintk("--> %s\n", __func__);
7024 task = rpc_run_task(&task_setup);
7025
7026 if (IS_ERR(task))
7027 status = PTR_ERR(task);
7028 else {
7029 status = task->tk_status;
7030 rpc_put_task(task);
7031 }
7032 dprintk("<-- %s return %d\n", __func__, status);
7033
7034 return status;
7035}
7036
Andy Adamsonfc931582009-04-01 09:22:31 -04007037/*
7038 * Initialize the values to be used by the client in CREATE_SESSION
7039 * If nfs4_init_session set the fore channel request and response sizes,
7040 * use them.
7041 *
7042 * Set the back channel max_resp_sz_cached to zero to force the client to
7043 * always set csa_cachethis to FALSE because the current implementation
7044 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7045 */
7046static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7047{
Andy Adamson18aad3d2013-06-26 12:21:49 -04007048 unsigned int max_rqst_sz, max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007049
Andy Adamson18aad3d2013-06-26 12:21:49 -04007050 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7051 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7052
Andy Adamsonfc931582009-04-01 09:22:31 -04007053 /* Fore channel attributes */
Andy Adamson18aad3d2013-06-26 12:21:49 -04007054 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7055 args->fc_attrs.max_resp_sz = max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04007056 args->fc_attrs.max_ops = NFS4_MAX_OPS;
Trond Myklebustef159e92012-02-06 19:50:40 -05007057 args->fc_attrs.max_reqs = max_session_slots;
Andy Adamsonfc931582009-04-01 09:22:31 -04007058
7059 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
Mike Sager8e0d46e2009-12-17 12:06:26 -05007060 "max_ops=%u max_reqs=%u\n",
Andy Adamsonfc931582009-04-01 09:22:31 -04007061 __func__,
7062 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
Mike Sager8e0d46e2009-12-17 12:06:26 -05007063 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
Andy Adamsonfc931582009-04-01 09:22:31 -04007064
7065 /* Back channel attributes */
Andy Adamsonfc931582009-04-01 09:22:31 -04007066 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7067 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7068 args->bc_attrs.max_resp_sz_cached = 0;
7069 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7070 args->bc_attrs.max_reqs = 1;
7071
7072 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7073 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7074 __func__,
7075 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7076 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7077 args->bc_attrs.max_reqs);
7078}
7079
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007080static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
Andy Adamson8d353012009-04-01 09:22:32 -04007081{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007082 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7083 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7084
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007085 if (rcvd->max_resp_sz > sent->max_resp_sz)
7086 return -EINVAL;
7087 /*
7088 * Our requested max_ops is the minimum we need; we're not
7089 * prepared to break up compounds into smaller pieces than that.
7090 * So, no point even trying to continue if the server won't
7091 * cooperate:
7092 */
7093 if (rcvd->max_ops < sent->max_ops)
7094 return -EINVAL;
7095 if (rcvd->max_reqs == 0)
7096 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007097 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7098 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007099 return 0;
Andy Adamson8d353012009-04-01 09:22:32 -04007100}
7101
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007102static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7103{
7104 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7105 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
Andy Adamson8d353012009-04-01 09:22:32 -04007106
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007107 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7108 return -EINVAL;
7109 if (rcvd->max_resp_sz < sent->max_resp_sz)
7110 return -EINVAL;
7111 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7112 return -EINVAL;
7113 /* These would render the backchannel useless: */
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007114 if (rcvd->max_ops != sent->max_ops)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007115 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007116 if (rcvd->max_reqs != sent->max_reqs)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007117 return -EINVAL;
7118 return 0;
7119}
Andy Adamson8d353012009-04-01 09:22:32 -04007120
Andy Adamson8d353012009-04-01 09:22:32 -04007121static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7122 struct nfs4_session *session)
7123{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007124 int ret;
Andy Adamson8d353012009-04-01 09:22:32 -04007125
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007126 ret = nfs4_verify_fore_channel_attrs(args, session);
7127 if (ret)
7128 return ret;
7129 return nfs4_verify_back_channel_attrs(args, session);
Andy Adamson8d353012009-04-01 09:22:32 -04007130}
7131
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007132static int _nfs4_proc_create_session(struct nfs_client *clp,
7133 struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007134{
7135 struct nfs4_session *session = clp->cl_session;
7136 struct nfs41_create_session_args args = {
7137 .client = clp,
7138 .cb_program = NFS4_CALLBACK,
7139 };
7140 struct nfs41_create_session_res res = {
7141 .client = clp,
7142 };
7143 struct rpc_message msg = {
7144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7145 .rpc_argp = &args,
7146 .rpc_resp = &res,
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007147 .rpc_cred = cred,
Andy Adamsonfc931582009-04-01 09:22:31 -04007148 };
7149 int status;
7150
7151 nfs4_init_channel_attrs(&args);
Andy Adamson0f914212009-04-01 09:23:16 -04007152 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
Andy Adamsonfc931582009-04-01 09:22:31 -04007153
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007154 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007155 trace_nfs4_create_session(clp, status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007156
Trond Myklebust43095d32012-11-20 11:13:12 -05007157 if (!status) {
Andy Adamson8d353012009-04-01 09:22:32 -04007158 /* Verify the session's negotiated channel_attrs values */
7159 status = nfs4_verify_channel_attrs(&args, session);
Andy Adamsonfc931582009-04-01 09:22:31 -04007160 /* Increment the clientid slot sequence id */
7161 clp->cl_seqid++;
7162 }
7163
7164 return status;
7165}
7166
7167/*
7168 * Issues a CREATE_SESSION operation to the server.
7169 * It is the responsibility of the caller to verify the session is
7170 * expired before calling this routine.
7171 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007172int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007173{
7174 int status;
7175 unsigned *ptr;
Andy Adamsonfc931582009-04-01 09:22:31 -04007176 struct nfs4_session *session = clp->cl_session;
7177
7178 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7179
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007180 status = _nfs4_proc_create_session(clp, cred);
Andy Adamsonfc931582009-04-01 09:22:31 -04007181 if (status)
7182 goto out;
7183
Andy Adamsonaacd5532011-11-09 13:58:21 -05007184 /* Init or reset the session slot tables */
7185 status = nfs4_setup_session_slot_tables(session);
7186 dprintk("slot table setup returned %d\n", status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007187 if (status)
7188 goto out;
7189
7190 ptr = (unsigned *)&session->sess_id.data[0];
7191 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7192 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
Andy Adamsonfc931582009-04-01 09:22:31 -04007193out:
7194 dprintk("<-- %s\n", __func__);
7195 return status;
7196}
7197
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007198/*
7199 * Issue the over-the-wire RPC DESTROY_SESSION.
7200 * The caller must serialize access to this routine.
7201 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007202int nfs4_proc_destroy_session(struct nfs4_session *session,
7203 struct rpc_cred *cred)
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007204{
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007205 struct rpc_message msg = {
7206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7207 .rpc_argp = session,
7208 .rpc_cred = cred,
7209 };
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007210 int status = 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007211
7212 dprintk("--> nfs4_proc_destroy_session\n");
7213
7214 /* session is still being setup */
7215 if (session->clp->cl_cons_state != NFS_CS_READY)
7216 return status;
7217
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007218 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007219 trace_nfs4_destroy_session(session->clp, status);
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007220
7221 if (status)
Trond Myklebust08106ac2012-06-05 10:08:24 -04007222 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007223 "Session has been destroyed regardless...\n", status);
7224
7225 dprintk("<-- nfs4_proc_destroy_session\n");
7226 return status;
7227}
7228
Trond Myklebust7b38c362012-05-23 13:23:31 -04007229/*
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007230 * Renew the cl_session lease.
7231 */
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007232struct nfs4_sequence_data {
7233 struct nfs_client *clp;
7234 struct nfs4_sequence_args args;
7235 struct nfs4_sequence_res res;
7236};
7237
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007238static void nfs41_sequence_release(void *data)
7239{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007240 struct nfs4_sequence_data *calldata = data;
7241 struct nfs_client *clp = calldata->clp;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007242
Alexandros Batsakis71358402010-02-05 03:45:05 -08007243 if (atomic_read(&clp->cl_count) > 1)
7244 nfs4_schedule_state_renewal(clp);
7245 nfs_put_client(clp);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007246 kfree(calldata);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007247}
7248
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007249static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7250{
7251 switch(task->tk_status) {
7252 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007253 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7254 return -EAGAIN;
7255 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007256 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007257 }
7258 return 0;
7259}
7260
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007261static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007262{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007263 struct nfs4_sequence_data *calldata = data;
7264 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007265
Trond Myklebust14516c32010-07-31 14:29:06 -04007266 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7267 return;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007268
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007269 trace_nfs4_sequence(clp, task->tk_status);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007270 if (task->tk_status < 0) {
7271 dprintk("%s ERROR %d\n", __func__, task->tk_status);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007272 if (atomic_read(&clp->cl_count) == 1)
7273 goto out;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007274
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007275 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7276 rpc_restart_call_prepare(task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007277 return;
7278 }
7279 }
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007280 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007281out:
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007282 dprintk("<-- %s\n", __func__);
7283}
7284
7285static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7286{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007287 struct nfs4_sequence_data *calldata = data;
7288 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007289 struct nfs4_sequence_args *args;
7290 struct nfs4_sequence_res *res;
7291
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007292 args = task->tk_msg.rpc_argp;
7293 res = task->tk_msg.rpc_resp;
7294
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007295 nfs41_setup_sequence(clp->cl_session, args, res, task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007296}
7297
7298static const struct rpc_call_ops nfs41_sequence_ops = {
7299 .rpc_call_done = nfs41_sequence_call_done,
7300 .rpc_call_prepare = nfs41_sequence_prepare,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007301 .rpc_release = nfs41_sequence_release,
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007302};
7303
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007304static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7305 struct rpc_cred *cred,
7306 bool is_privileged)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007307{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007308 struct nfs4_sequence_data *calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007309 struct rpc_message msg = {
7310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7311 .rpc_cred = cred,
7312 };
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007313 struct rpc_task_setup task_setup_data = {
7314 .rpc_client = clp->cl_rpcclient,
7315 .rpc_message = &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007316 .callback_ops = &nfs41_sequence_ops,
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04007317 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007318 };
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007319
Alexandros Batsakis71358402010-02-05 03:45:05 -08007320 if (!atomic_inc_not_zero(&clp->cl_count))
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007321 return ERR_PTR(-EIO);
Benny Halevydfb4f3092010-09-24 09:17:01 -04007322 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007323 if (calldata == NULL) {
Alexandros Batsakis71358402010-02-05 03:45:05 -08007324 nfs_put_client(clp);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007325 return ERR_PTR(-ENOMEM);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007326 }
Chuck Levera9c92d62013-08-09 12:48:18 -04007327 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007328 if (is_privileged)
7329 nfs4_set_sequence_privileged(&calldata->args);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007330 msg.rpc_argp = &calldata->args;
7331 msg.rpc_resp = &calldata->res;
7332 calldata->clp = clp;
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007333 task_setup_data.callback_data = calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007334
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007335 return rpc_run_task(&task_setup_data);
7336}
7337
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007338static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007339{
7340 struct rpc_task *task;
7341 int ret = 0;
7342
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007343 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7344 return 0;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007345 task = _nfs41_proc_sequence(clp, cred, false);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007346 if (IS_ERR(task))
7347 ret = PTR_ERR(task);
7348 else
Trond Myklebustbf294b42011-02-21 11:05:41 -08007349 rpc_put_task_async(task);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007350 dprintk("<-- %s status=%d\n", __func__, ret);
7351 return ret;
7352}
7353
7354static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7355{
7356 struct rpc_task *task;
7357 int ret;
7358
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007359 task = _nfs41_proc_sequence(clp, cred, true);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007360 if (IS_ERR(task)) {
7361 ret = PTR_ERR(task);
7362 goto out;
7363 }
7364 ret = rpc_wait_for_completion_task(task);
Trond Myklebustb4410c22011-03-09 16:00:55 -05007365 if (!ret) {
7366 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7367
7368 if (task->tk_status == 0)
7369 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007370 ret = task->tk_status;
Trond Myklebustb4410c22011-03-09 16:00:55 -05007371 }
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007372 rpc_put_task(task);
7373out:
7374 dprintk("<-- %s status=%d\n", __func__, ret);
7375 return ret;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007376}
7377
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007378struct nfs4_reclaim_complete_data {
7379 struct nfs_client *clp;
7380 struct nfs41_reclaim_complete_args arg;
7381 struct nfs41_reclaim_complete_res res;
7382};
7383
7384static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7385{
7386 struct nfs4_reclaim_complete_data *calldata = data;
7387
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007388 nfs41_setup_sequence(calldata->clp->cl_session,
7389 &calldata->arg.seq_args,
7390 &calldata->res.seq_res,
7391 task);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007392}
7393
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007394static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7395{
7396 switch(task->tk_status) {
7397 case 0:
7398 case -NFS4ERR_COMPLETE_ALREADY:
7399 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7400 break;
7401 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007402 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007403 /* fall through */
7404 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007405 return -EAGAIN;
7406 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007407 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007408 }
7409 return 0;
7410}
7411
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007412static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7413{
7414 struct nfs4_reclaim_complete_data *calldata = data;
7415 struct nfs_client *clp = calldata->clp;
7416 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7417
7418 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007419 if (!nfs41_sequence_done(task, res))
7420 return;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007421
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007422 trace_nfs4_reclaim_complete(clp, task->tk_status);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007423 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7424 rpc_restart_call_prepare(task);
7425 return;
7426 }
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007427 dprintk("<-- %s\n", __func__);
7428}
7429
7430static void nfs4_free_reclaim_complete_data(void *data)
7431{
7432 struct nfs4_reclaim_complete_data *calldata = data;
7433
7434 kfree(calldata);
7435}
7436
7437static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7438 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7439 .rpc_call_done = nfs4_reclaim_complete_done,
7440 .rpc_release = nfs4_free_reclaim_complete_data,
7441};
7442
7443/*
7444 * Issue a global reclaim complete.
7445 */
Trond Myklebust965e9c22013-05-20 11:05:17 -04007446static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7447 struct rpc_cred *cred)
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007448{
7449 struct nfs4_reclaim_complete_data *calldata;
7450 struct rpc_task *task;
7451 struct rpc_message msg = {
7452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
Trond Myklebust965e9c22013-05-20 11:05:17 -04007453 .rpc_cred = cred,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007454 };
7455 struct rpc_task_setup task_setup_data = {
7456 .rpc_client = clp->cl_rpcclient,
7457 .rpc_message = &msg,
7458 .callback_ops = &nfs4_reclaim_complete_call_ops,
7459 .flags = RPC_TASK_ASYNC,
7460 };
7461 int status = -ENOMEM;
7462
7463 dprintk("--> %s\n", __func__);
Trond Myklebust8535b2b2010-05-13 12:51:01 -04007464 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007465 if (calldata == NULL)
7466 goto out;
7467 calldata->clp = clp;
7468 calldata->arg.one_fs = 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007469
Chuck Levera9c92d62013-08-09 12:48:18 -04007470 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007471 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007472 msg.rpc_argp = &calldata->arg;
7473 msg.rpc_resp = &calldata->res;
7474 task_setup_data.callback_data = calldata;
7475 task = rpc_run_task(&task_setup_data);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007476 if (IS_ERR(task)) {
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007477 status = PTR_ERR(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007478 goto out;
7479 }
Andy Adamsonc34c32e2011-03-09 13:13:46 -05007480 status = nfs4_wait_for_completion_rpc_task(task);
7481 if (status == 0)
7482 status = task->tk_status;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007483 rpc_put_task(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007484 return 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007485out:
7486 dprintk("<-- %s status=%d\n", __func__, status);
7487 return status;
7488}
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007489
7490static void
7491nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7492{
7493 struct nfs4_layoutget *lgp = calldata;
Fred Isamanc31663d2011-01-06 11:36:24 +00007494 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007495 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007496
7497 dprintk("--> %s\n", __func__);
Fred Isamanc31663d2011-01-06 11:36:24 +00007498 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7499 * right now covering the LAYOUTGET we are about to send.
7500 * However, that is not so catastrophic, and there seems
7501 * to be no way to prevent it completely.
7502 */
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007503 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
Trond Myklebust9d12b212012-01-17 22:04:25 -05007504 &lgp->res.seq_res, task))
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007505 return;
Fred Isamancf7d63f2011-01-06 11:36:25 +00007506 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7507 NFS_I(lgp->args.inode)->layout,
7508 lgp->args.ctx->state)) {
7509 rpc_exit(task, NFS4_OK);
Fred Isamancf7d63f2011-01-06 11:36:25 +00007510 }
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007511}
7512
7513static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7514{
7515 struct nfs4_layoutget *lgp = calldata;
Trond Myklebustee314c22012-10-01 17:25:48 -07007516 struct inode *inode = lgp->args.inode;
7517 struct nfs_server *server = NFS_SERVER(inode);
7518 struct pnfs_layout_hdr *lo;
7519 struct nfs4_state *state = NULL;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007520 unsigned long timeo, now, giveup;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007521
Boaz Harroshed7e5422014-01-22 20:34:54 +02007522 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007523
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007524 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
Trond Myklebustee314c22012-10-01 17:25:48 -07007525 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007526
7527 switch (task->tk_status) {
7528 case 0:
Trond Myklebustee314c22012-10-01 17:25:48 -07007529 goto out;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007530 /*
7531 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7532 * (or clients) writing to the same RAID stripe
7533 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007534 case -NFS4ERR_LAYOUTTRYLATER:
Boaz Harroshed7e5422014-01-22 20:34:54 +02007535 /*
7536 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7537 * existing layout before getting a new one).
7538 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007539 case -NFS4ERR_RECALLCONFLICT:
Weston Andros Adamson30005122013-02-28 20:30:10 -05007540 timeo = rpc_get_timeout(task->tk_client);
7541 giveup = lgp->args.timestamp + timeo;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007542 now = jiffies;
7543 if (time_after(giveup, now)) {
7544 unsigned long delay;
7545
7546 /* Delay for:
7547 * - Not less then NFS4_POLL_RETRY_MIN.
7548 * - One last time a jiffie before we give up
7549 * - exponential backoff (time_now minus start_attempt)
7550 */
7551 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7552 min((giveup - now - 1),
7553 now - lgp->args.timestamp));
7554
7555 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7556 __func__, delay);
7557 rpc_delay(task, delay);
7558 task->tk_status = 0;
7559 rpc_restart_call_prepare(task);
7560 goto out; /* Do not call nfs4_async_handle_error() */
7561 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007562 break;
7563 case -NFS4ERR_EXPIRED:
7564 case -NFS4ERR_BAD_STATEID:
7565 spin_lock(&inode->i_lock);
7566 lo = NFS_I(inode)->layout;
7567 if (!lo || list_empty(&lo->plh_segs)) {
7568 spin_unlock(&inode->i_lock);
7569 /* If the open stateid was bad, then recover it. */
7570 state = lgp->args.ctx->state;
7571 } else {
7572 LIST_HEAD(head);
7573
7574 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7575 spin_unlock(&inode->i_lock);
7576 /* Mark the bad layout state as invalid, then
7577 * retry using the open stateid. */
7578 pnfs_free_lseg_list(&head);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007579 }
7580 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007581 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7582 rpc_restart_call_prepare(task);
7583out:
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007584 dprintk("<-- %s\n", __func__);
7585}
7586
Idan Kedar85541162012-08-02 11:47:10 +03007587static size_t max_response_pages(struct nfs_server *server)
7588{
7589 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7590 return nfs_page_array_len(0, max_resp_sz);
7591}
7592
7593static void nfs4_free_pages(struct page **pages, size_t size)
7594{
7595 int i;
7596
7597 if (!pages)
7598 return;
7599
7600 for (i = 0; i < size; i++) {
7601 if (!pages[i])
7602 break;
7603 __free_page(pages[i]);
7604 }
7605 kfree(pages);
7606}
7607
7608static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7609{
7610 struct page **pages;
7611 int i;
7612
7613 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7614 if (!pages) {
7615 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7616 return NULL;
7617 }
7618
7619 for (i = 0; i < size; i++) {
7620 pages[i] = alloc_page(gfp_flags);
7621 if (!pages[i]) {
7622 dprintk("%s: failed to allocate page\n", __func__);
7623 nfs4_free_pages(pages, size);
7624 return NULL;
7625 }
7626 }
7627
7628 return pages;
7629}
7630
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007631static void nfs4_layoutget_release(void *calldata)
7632{
7633 struct nfs4_layoutget *lgp = calldata;
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007634 struct inode *inode = lgp->args.inode;
7635 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007636 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007637
7638 dprintk("--> %s\n", __func__);
Idan Kedar85541162012-08-02 11:47:10 +03007639 nfs4_free_pages(lgp->args.layout.pages, max_pages);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007640 pnfs_put_layout_hdr(NFS_I(inode)->layout);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007641 put_nfs_open_context(lgp->args.ctx);
7642 kfree(calldata);
7643 dprintk("<-- %s\n", __func__);
7644}
7645
7646static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7647 .rpc_call_prepare = nfs4_layoutget_prepare,
7648 .rpc_call_done = nfs4_layoutget_done,
7649 .rpc_release = nfs4_layoutget_release,
7650};
7651
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007652struct pnfs_layout_segment *
7653nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007654{
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007655 struct inode *inode = lgp->args.inode;
7656 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007657 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007658 struct rpc_task *task;
7659 struct rpc_message msg = {
7660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7661 .rpc_argp = &lgp->args,
7662 .rpc_resp = &lgp->res,
Trond Myklebust6ab59342013-05-20 10:49:34 -04007663 .rpc_cred = lgp->cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007664 };
7665 struct rpc_task_setup task_setup_data = {
7666 .rpc_client = server->client,
7667 .rpc_message = &msg,
7668 .callback_ops = &nfs4_layoutget_call_ops,
7669 .callback_data = lgp,
7670 .flags = RPC_TASK_ASYNC,
7671 };
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007672 struct pnfs_layout_segment *lseg = NULL;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007673 int status = 0;
7674
7675 dprintk("--> %s\n", __func__);
7676
Idan Kedar85541162012-08-02 11:47:10 +03007677 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7678 if (!lgp->args.layout.pages) {
7679 nfs4_layoutget_release(lgp);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007680 return ERR_PTR(-ENOMEM);
Idan Kedar85541162012-08-02 11:47:10 +03007681 }
7682 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
Weston Andros Adamson30005122013-02-28 20:30:10 -05007683 lgp->args.timestamp = jiffies;
Idan Kedar85541162012-08-02 11:47:10 +03007684
Weston Andros Adamson35124a02011-03-24 16:48:21 -04007685 lgp->res.layoutp = &lgp->args.layout;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007686 lgp->res.seq_res.sr_slot = NULL;
Chuck Levera9c92d62013-08-09 12:48:18 -04007687 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007688
7689 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7690 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7691
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007692 task = rpc_run_task(&task_setup_data);
7693 if (IS_ERR(task))
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007694 return ERR_CAST(task);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007695 status = nfs4_wait_for_completion_rpc_task(task);
Fred Isamanc31663d2011-01-06 11:36:24 +00007696 if (status == 0)
7697 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007698 trace_nfs4_layoutget(lgp->args.ctx,
7699 &lgp->args.range,
7700 &lgp->res.range,
7701 status);
Weston Andros Adamson085b7a42013-02-15 16:03:46 -05007702 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7703 if (status == 0 && lgp->res.layoutp->len)
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007704 lseg = pnfs_layout_process(lgp);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007705 rpc_put_task(task);
7706 dprintk("<-- %s status=%d\n", __func__, status);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007707 if (status)
7708 return ERR_PTR(status);
7709 return lseg;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007710}
7711
Benny Halevycbe82602011-05-22 19:52:37 +03007712static void
7713nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7714{
7715 struct nfs4_layoutreturn *lrp = calldata;
7716
7717 dprintk("--> %s\n", __func__);
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007718 nfs41_setup_sequence(lrp->clp->cl_session,
7719 &lrp->args.seq_args,
7720 &lrp->res.seq_res,
7721 task);
Benny Halevycbe82602011-05-22 19:52:37 +03007722}
7723
7724static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7725{
7726 struct nfs4_layoutreturn *lrp = calldata;
7727 struct nfs_server *server;
7728
7729 dprintk("--> %s\n", __func__);
7730
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007731 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
Benny Halevycbe82602011-05-22 19:52:37 +03007732 return;
7733
7734 server = NFS_SERVER(lrp->args.inode);
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05007735 switch (task->tk_status) {
7736 default:
7737 task->tk_status = 0;
7738 case 0:
7739 break;
7740 case -NFS4ERR_DELAY:
7741 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7742 break;
Trond Myklebustd00c5d42011-10-19 12:17:29 -07007743 rpc_restart_call_prepare(task);
Benny Halevycbe82602011-05-22 19:52:37 +03007744 return;
7745 }
Benny Halevycbe82602011-05-22 19:52:37 +03007746 dprintk("<-- %s\n", __func__);
7747}
7748
7749static void nfs4_layoutreturn_release(void *calldata)
7750{
7751 struct nfs4_layoutreturn *lrp = calldata;
Trond Myklebust849b2862012-09-24 14:18:39 -04007752 struct pnfs_layout_hdr *lo = lrp->args.layout;
Benny Halevycbe82602011-05-22 19:52:37 +03007753
7754 dprintk("--> %s\n", __func__);
Trond Myklebust849b2862012-09-24 14:18:39 -04007755 spin_lock(&lo->plh_inode->i_lock);
7756 if (lrp->res.lrs_present)
7757 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7758 lo->plh_block_lgets--;
7759 spin_unlock(&lo->plh_inode->i_lock);
Trond Myklebust70c3bd22012-09-18 20:51:13 -04007760 pnfs_put_layout_hdr(lrp->args.layout);
Benny Halevycbe82602011-05-22 19:52:37 +03007761 kfree(calldata);
7762 dprintk("<-- %s\n", __func__);
7763}
7764
7765static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7766 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7767 .rpc_call_done = nfs4_layoutreturn_done,
7768 .rpc_release = nfs4_layoutreturn_release,
7769};
7770
7771int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7772{
7773 struct rpc_task *task;
7774 struct rpc_message msg = {
7775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7776 .rpc_argp = &lrp->args,
7777 .rpc_resp = &lrp->res,
Trond Myklebust95560002013-05-20 10:43:47 -04007778 .rpc_cred = lrp->cred,
Benny Halevycbe82602011-05-22 19:52:37 +03007779 };
7780 struct rpc_task_setup task_setup_data = {
Andy Adamson1771c572013-07-22 12:42:05 -04007781 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
Benny Halevycbe82602011-05-22 19:52:37 +03007782 .rpc_message = &msg,
7783 .callback_ops = &nfs4_layoutreturn_call_ops,
7784 .callback_data = lrp,
7785 };
7786 int status;
7787
7788 dprintk("--> %s\n", __func__);
Chuck Levera9c92d62013-08-09 12:48:18 -04007789 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
Benny Halevycbe82602011-05-22 19:52:37 +03007790 task = rpc_run_task(&task_setup_data);
7791 if (IS_ERR(task))
7792 return PTR_ERR(task);
7793 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007794 trace_nfs4_layoutreturn(lrp->args.inode, status);
Benny Halevycbe82602011-05-22 19:52:37 +03007795 dprintk("<-- %s status=%d\n", __func__, status);
7796 rpc_put_task(task);
7797 return status;
7798}
7799
Andy Adamson7f11d8d2011-07-30 20:52:35 -04007800/*
7801 * Retrieve the list of Data Server devices from the MDS.
7802 */
7803static int _nfs4_getdevicelist(struct nfs_server *server,
7804 const struct nfs_fh *fh,
7805 struct pnfs_devicelist *devlist)
7806{
7807 struct nfs4_getdevicelist_args args = {
7808 .fh = fh,
7809 .layoutclass = server->pnfs_curr_ld->id,
7810 };
7811 struct nfs4_getdevicelist_res res = {
7812 .devlist = devlist,
7813 };
7814 struct rpc_message msg = {
7815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7816 .rpc_argp = &args,
7817 .rpc_resp = &res,
7818 };
7819 int status;
7820
7821 dprintk("--> %s\n", __func__);
7822 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7823 &res.seq_res, 0);
7824 dprintk("<-- %s status=%d\n", __func__, status);
7825 return status;
7826}
7827
7828int nfs4_proc_getdevicelist(struct nfs_server *server,
7829 const struct nfs_fh *fh,
7830 struct pnfs_devicelist *devlist)
7831{
7832 struct nfs4_exception exception = { };
7833 int err;
7834
7835 do {
7836 err = nfs4_handle_exception(server,
7837 _nfs4_getdevicelist(server, fh, devlist),
7838 &exception);
7839 } while (exception.retry);
7840
7841 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7842 err, devlist->num_devs);
7843
7844 return err;
7845}
7846EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7847
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007848static int
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007849_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7850 struct pnfs_device *pdev,
7851 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007852{
7853 struct nfs4_getdeviceinfo_args args = {
7854 .pdev = pdev,
7855 };
7856 struct nfs4_getdeviceinfo_res res = {
7857 .pdev = pdev,
7858 };
7859 struct rpc_message msg = {
7860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7861 .rpc_argp = &args,
7862 .rpc_resp = &res,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007863 .rpc_cred = cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007864 };
7865 int status;
7866
7867 dprintk("--> %s\n", __func__);
Bryan Schumaker7c513052011-03-24 17:12:24 +00007868 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007869 dprintk("<-- %s status=%d\n", __func__, status);
7870
7871 return status;
7872}
7873
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007874int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7875 struct pnfs_device *pdev,
7876 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007877{
7878 struct nfs4_exception exception = { };
7879 int err;
7880
7881 do {
7882 err = nfs4_handle_exception(server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007883 _nfs4_proc_getdeviceinfo(server, pdev, cred),
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007884 &exception);
7885 } while (exception.retry);
7886 return err;
7887}
7888EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7889
Andy Adamson863a3c62011-03-23 13:27:54 +00007890static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7891{
7892 struct nfs4_layoutcommit_data *data = calldata;
7893 struct nfs_server *server = NFS_SERVER(data->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007894 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamson863a3c62011-03-23 13:27:54 +00007895
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007896 nfs41_setup_sequence(session,
7897 &data->args.seq_args,
7898 &data->res.seq_res,
7899 task);
Andy Adamson863a3c62011-03-23 13:27:54 +00007900}
7901
7902static void
7903nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7904{
7905 struct nfs4_layoutcommit_data *data = calldata;
7906 struct nfs_server *server = NFS_SERVER(data->args.inode);
7907
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007908 if (!nfs41_sequence_done(task, &data->res.seq_res))
Andy Adamson863a3c62011-03-23 13:27:54 +00007909 return;
7910
7911 switch (task->tk_status) { /* Just ignore these failures */
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007912 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7913 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7914 case -NFS4ERR_BADLAYOUT: /* no layout */
7915 case -NFS4ERR_GRACE: /* loca_recalim always false */
Andy Adamson863a3c62011-03-23 13:27:54 +00007916 task->tk_status = 0;
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007917 case 0:
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007918 break;
7919 default:
7920 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7921 rpc_restart_call_prepare(task);
7922 return;
7923 }
7924 }
Andy Adamson863a3c62011-03-23 13:27:54 +00007925}
7926
7927static void nfs4_layoutcommit_release(void *calldata)
7928{
7929 struct nfs4_layoutcommit_data *data = calldata;
7930
Andy Adamsondb29c082011-07-30 20:52:38 -04007931 pnfs_cleanup_layoutcommit(data);
Trond Myklebustd8c951c2014-01-13 12:08:11 -05007932 nfs_post_op_update_inode_force_wcc(data->args.inode,
7933 data->res.fattr);
Andy Adamson863a3c62011-03-23 13:27:54 +00007934 put_rpccred(data->cred);
7935 kfree(data);
7936}
7937
7938static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7939 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7940 .rpc_call_done = nfs4_layoutcommit_done,
7941 .rpc_release = nfs4_layoutcommit_release,
7942};
7943
7944int
Andy Adamsonef311532011-03-12 02:58:10 -05007945nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +00007946{
7947 struct rpc_message msg = {
7948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7949 .rpc_argp = &data->args,
7950 .rpc_resp = &data->res,
7951 .rpc_cred = data->cred,
7952 };
7953 struct rpc_task_setup task_setup_data = {
7954 .task = &data->task,
7955 .rpc_client = NFS_CLIENT(data->args.inode),
7956 .rpc_message = &msg,
7957 .callback_ops = &nfs4_layoutcommit_ops,
7958 .callback_data = data,
7959 .flags = RPC_TASK_ASYNC,
7960 };
7961 struct rpc_task *task;
7962 int status = 0;
7963
7964 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7965 "lbw: %llu inode %lu\n",
7966 data->task.tk_pid, sync,
7967 data->args.lastbytewritten,
7968 data->args.inode->i_ino);
7969
Chuck Levera9c92d62013-08-09 12:48:18 -04007970 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Andy Adamson863a3c62011-03-23 13:27:54 +00007971 task = rpc_run_task(&task_setup_data);
7972 if (IS_ERR(task))
7973 return PTR_ERR(task);
Andy Adamsonef311532011-03-12 02:58:10 -05007974 if (sync == false)
Andy Adamson863a3c62011-03-23 13:27:54 +00007975 goto out;
7976 status = nfs4_wait_for_completion_rpc_task(task);
7977 if (status != 0)
7978 goto out;
7979 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007980 trace_nfs4_layoutcommit(data->args.inode, status);
Andy Adamson863a3c62011-03-23 13:27:54 +00007981out:
7982 dprintk("%s: status %d\n", __func__, status);
7983 rpc_put_task(task);
7984 return status;
7985}
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007986
Andy Adamson97431202013-08-08 10:57:56 -04007987/**
7988 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7989 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7990 */
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007991static int
7992_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007993 struct nfs_fsinfo *info,
7994 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007995{
7996 struct nfs41_secinfo_no_name_args args = {
7997 .style = SECINFO_STYLE_CURRENT_FH,
7998 };
7999 struct nfs4_secinfo_res res = {
8000 .flavors = flavors,
8001 };
8002 struct rpc_message msg = {
8003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8004 .rpc_argp = &args,
8005 .rpc_resp = &res,
8006 };
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008007 struct rpc_clnt *clnt = server->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008008 struct rpc_cred *cred = NULL;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008009 int status;
8010
8011 if (use_integrity) {
8012 clnt = server->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008013 cred = nfs4_get_clid_cred(server->nfs_client);
8014 msg.rpc_cred = cred;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008015 }
8016
8017 dprintk("--> %s\n", __func__);
8018 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8019 &res.seq_res, 0);
8020 dprintk("<-- %s status=%d\n", __func__, status);
8021
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04008022 if (cred)
8023 put_rpccred(cred);
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008024
8025 return status;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008026}
8027
8028static int
8029nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8030 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8031{
8032 struct nfs4_exception exception = { };
8033 int err;
8034 do {
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04008035 /* first try using integrity protection */
8036 err = -NFS4ERR_WRONGSEC;
8037
8038 /* try to use integrity protection with machine cred */
8039 if (_nfs4_is_integrity_protected(server->nfs_client))
8040 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8041 flavors, true);
8042
8043 /*
8044 * if unable to use integrity protection, or SECINFO with
8045 * integrity protection returns NFS4ERR_WRONGSEC (which is
8046 * disallowed by spec, but exists in deployed servers) use
8047 * the current filesystem's rpc_client and the user cred.
8048 */
8049 if (err == -NFS4ERR_WRONGSEC)
8050 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8051 flavors, false);
8052
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008053 switch (err) {
8054 case 0:
8055 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008056 case -ENOTSUPP:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008057 goto out;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008058 default:
8059 err = nfs4_handle_exception(server, err, &exception);
8060 }
8061 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04008062out:
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008063 return err;
8064}
8065
8066static int
8067nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8068 struct nfs_fsinfo *info)
8069{
8070 int err;
8071 struct page *page;
Anna Schumaker367156d2013-09-25 17:02:48 -04008072 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008073 struct nfs4_secinfo_flavors *flavors;
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008074 struct nfs4_secinfo4 *secinfo;
8075 int i;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008076
8077 page = alloc_page(GFP_KERNEL);
8078 if (!page) {
8079 err = -ENOMEM;
8080 goto out;
8081 }
8082
8083 flavors = page_address(page);
8084 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8085
8086 /*
8087 * Fall back on "guess and check" method if
8088 * the server doesn't support SECINFO_NO_NAME
8089 */
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05008090 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008091 err = nfs4_find_root_sec(server, fhandle, info);
8092 goto out_freepage;
8093 }
8094 if (err)
8095 goto out_freepage;
8096
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008097 for (i = 0; i < flavors->num_flavors; i++) {
8098 secinfo = &flavors->flavors[i];
8099
8100 switch (secinfo->flavor) {
8101 case RPC_AUTH_NULL:
8102 case RPC_AUTH_UNIX:
8103 case RPC_AUTH_GSS:
8104 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8105 &secinfo->flavor_info);
8106 break;
8107 default:
8108 flavor = RPC_AUTH_MAXFLAVOR;
8109 break;
8110 }
8111
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04008112 if (!nfs_auth_info_match(&server->auth_info, flavor))
8113 flavor = RPC_AUTH_MAXFLAVOR;
8114
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008115 if (flavor != RPC_AUTH_MAXFLAVOR) {
8116 err = nfs4_lookup_root_sec(server, fhandle,
8117 info, flavor);
8118 if (!err)
8119 break;
8120 }
8121 }
8122
8123 if (flavor == RPC_AUTH_MAXFLAVOR)
8124 err = -EPERM;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008125
8126out_freepage:
8127 put_page(page);
8128 if (err == -EACCES)
8129 return -EPERM;
8130out:
8131 return err;
8132}
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008133
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008134static int _nfs41_test_stateid(struct nfs_server *server,
8135 nfs4_stateid *stateid,
8136 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008137{
8138 int status;
8139 struct nfs41_test_stateid_args args = {
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008140 .stateid = stateid,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008141 };
8142 struct nfs41_test_stateid_res res;
8143 struct rpc_message msg = {
8144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8145 .rpc_argp = &args,
8146 .rpc_resp = &res,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008147 .rpc_cred = cred,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008148 };
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008149 struct rpc_clnt *rpc_client = server->client;
8150
8151 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8152 &rpc_client, &msg);
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008153
Chuck Lever38527b12012-07-11 16:30:23 -04008154 dprintk("NFS call test_stateid %p\n", stateid);
Chuck Levera9c92d62013-08-09 12:48:18 -04008155 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008156 nfs4_set_sequence_privileged(&args.seq_args);
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008157 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008158 &args.seq_args, &res.seq_res);
Chuck Lever38527b12012-07-11 16:30:23 -04008159 if (status != NFS_OK) {
8160 dprintk("NFS reply test_stateid: failed, %d\n", status);
Chuck Lever377e5072012-07-11 16:29:45 -04008161 return status;
Chuck Lever38527b12012-07-11 16:30:23 -04008162 }
8163 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
Chuck Lever377e5072012-07-11 16:29:45 -04008164 return -res.status;
Bryan Schumaker7d974792011-06-02 14:59:08 -04008165}
8166
Chuck Lever38527b12012-07-11 16:30:23 -04008167/**
8168 * nfs41_test_stateid - perform a TEST_STATEID operation
8169 *
8170 * @server: server / transport on which to perform the operation
8171 * @stateid: state ID to test
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008172 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008173 *
8174 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8175 * Otherwise a negative NFS4ERR value is returned if the operation
8176 * failed or the state ID is not currently valid.
8177 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008178static int nfs41_test_stateid(struct nfs_server *server,
8179 nfs4_stateid *stateid,
8180 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008181{
8182 struct nfs4_exception exception = { };
8183 int err;
8184 do {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008185 err = _nfs41_test_stateid(server, stateid, cred);
Chuck Lever377e5072012-07-11 16:29:45 -04008186 if (err != -NFS4ERR_DELAY)
8187 break;
8188 nfs4_handle_exception(server, err, &exception);
Bryan Schumaker7d974792011-06-02 14:59:08 -04008189 } while (exception.retry);
8190 return err;
8191}
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008192
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008193struct nfs_free_stateid_data {
8194 struct nfs_server *server;
8195 struct nfs41_free_stateid_args args;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008196 struct nfs41_free_stateid_res res;
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008197};
8198
8199static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8200{
8201 struct nfs_free_stateid_data *data = calldata;
8202 nfs41_setup_sequence(nfs4_get_session(data->server),
8203 &data->args.seq_args,
8204 &data->res.seq_res,
8205 task);
8206}
8207
8208static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8209{
8210 struct nfs_free_stateid_data *data = calldata;
8211
8212 nfs41_sequence_done(task, &data->res.seq_res);
8213
8214 switch (task->tk_status) {
8215 case -NFS4ERR_DELAY:
8216 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8217 rpc_restart_call_prepare(task);
8218 }
8219}
8220
8221static void nfs41_free_stateid_release(void *calldata)
8222{
8223 kfree(calldata);
8224}
8225
Trond Myklebust17f26b12013-08-21 15:48:42 -04008226static const struct rpc_call_ops nfs41_free_stateid_ops = {
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008227 .rpc_call_prepare = nfs41_free_stateid_prepare,
8228 .rpc_call_done = nfs41_free_stateid_done,
8229 .rpc_release = nfs41_free_stateid_release,
8230};
8231
8232static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8233 nfs4_stateid *stateid,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008234 struct rpc_cred *cred,
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008235 bool privileged)
8236{
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008237 struct rpc_message msg = {
8238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008239 .rpc_cred = cred,
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008240 };
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008241 struct rpc_task_setup task_setup = {
8242 .rpc_client = server->client,
8243 .rpc_message = &msg,
8244 .callback_ops = &nfs41_free_stateid_ops,
8245 .flags = RPC_TASK_ASYNC,
8246 };
8247 struct nfs_free_stateid_data *data;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008248
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008249 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8250 &task_setup.rpc_client, &msg);
8251
Chuck Lever38527b12012-07-11 16:30:23 -04008252 dprintk("NFS call free_stateid %p\n", stateid);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008253 data = kmalloc(sizeof(*data), GFP_NOFS);
8254 if (!data)
8255 return ERR_PTR(-ENOMEM);
8256 data->server = server;
8257 nfs4_stateid_copy(&data->args.stateid, stateid);
8258
8259 task_setup.callback_data = data;
8260
8261 msg.rpc_argp = &data->args;
8262 msg.rpc_resp = &data->res;
Chuck Levera9c92d62013-08-09 12:48:18 -04008263 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008264 if (privileged)
8265 nfs4_set_sequence_privileged(&data->args.seq_args);
8266
8267 return rpc_run_task(&task_setup);
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008268}
8269
Chuck Lever38527b12012-07-11 16:30:23 -04008270/**
8271 * nfs41_free_stateid - perform a FREE_STATEID operation
8272 *
8273 * @server: server / transport on which to perform the operation
8274 * @stateid: state ID to release
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008275 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008276 *
8277 * Returns NFS_OK if the server freed "stateid". Otherwise a
8278 * negative NFS4ERR value is returned.
8279 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008280static int nfs41_free_stateid(struct nfs_server *server,
8281 nfs4_stateid *stateid,
8282 struct rpc_cred *cred)
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008283{
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008284 struct rpc_task *task;
8285 int ret;
8286
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008287 task = _nfs41_free_stateid(server, stateid, cred, true);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008288 if (IS_ERR(task))
8289 return PTR_ERR(task);
8290 ret = rpc_wait_for_completion_task(task);
8291 if (!ret)
8292 ret = task->tk_status;
8293 rpc_put_task(task);
8294 return ret;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008295}
Trond Myklebust36281ca2012-03-04 18:13:56 -05008296
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008297static void
8298nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008299{
8300 struct rpc_task *task;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008301 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008302
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008303 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008304 nfs4_free_lock_state(server, lsp);
8305 if (IS_ERR(task))
Jeff Laytonf1cdae82014-05-01 06:28:47 -04008306 return;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008307 rpc_put_task(task);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008308}
8309
Trond Myklebust36281ca2012-03-04 18:13:56 -05008310static bool nfs41_match_stateid(const nfs4_stateid *s1,
8311 const nfs4_stateid *s2)
8312{
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008313 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008314 return false;
8315
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008316 if (s1->seqid == s2->seqid)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008317 return true;
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008318 if (s1->seqid == 0 || s2->seqid == 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008319 return true;
8320
8321 return false;
8322}
8323
Andy Adamson557134a2009-04-01 09:21:53 -04008324#endif /* CONFIG_NFS_V4_1 */
8325
Trond Myklebust36281ca2012-03-04 18:13:56 -05008326static bool nfs4_match_stateid(const nfs4_stateid *s1,
8327 const nfs4_stateid *s2)
8328{
Trond Myklebustf597c532012-03-04 18:13:56 -05008329 return nfs4_stateid_match(s1, s2);
Trond Myklebust36281ca2012-03-04 18:13:56 -05008330}
8331
8332
Trond Myklebust17280172012-03-11 13:11:00 -04008333static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008334 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008335 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008336 .recover_open = nfs4_open_reclaim,
8337 .recover_lock = nfs4_lock_reclaim,
Andy Adamson591d71c2009-04-01 09:22:47 -04008338 .establish_clid = nfs4_init_clientid,
Chuck Lever05f4c352012-09-14 17:24:32 -04008339 .detect_trunking = nfs40_discover_server_trunking,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008340};
8341
Andy Adamson591d71c2009-04-01 09:22:47 -04008342#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008343static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008344 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8345 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8346 .recover_open = nfs4_open_reclaim,
8347 .recover_lock = nfs4_lock_reclaim,
Andy Adamson4d643d12009-12-04 15:52:24 -05008348 .establish_clid = nfs41_init_clientid,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05008349 .reclaim_complete = nfs41_proc_reclaim_complete,
Chuck Lever05f4c352012-09-14 17:24:32 -04008350 .detect_trunking = nfs41_discover_server_trunking,
Andy Adamson591d71c2009-04-01 09:22:47 -04008351};
8352#endif /* CONFIG_NFS_V4_1 */
8353
Trond Myklebust17280172012-03-11 13:11:00 -04008354static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008355 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008356 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008357 .recover_open = nfs4_open_expired,
8358 .recover_lock = nfs4_lock_expired,
Andy Adamson591d71c2009-04-01 09:22:47 -04008359 .establish_clid = nfs4_init_clientid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008360};
8361
Andy Adamson591d71c2009-04-01 09:22:47 -04008362#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008363static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008364 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8365 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Bryan Schumakerf062eb62011-06-02 14:59:10 -04008366 .recover_open = nfs41_open_expired,
8367 .recover_lock = nfs41_lock_expired,
Andy Adamson4d643d12009-12-04 15:52:24 -05008368 .establish_clid = nfs41_init_clientid,
Andy Adamson591d71c2009-04-01 09:22:47 -04008369};
8370#endif /* CONFIG_NFS_V4_1 */
8371
Trond Myklebust17280172012-03-11 13:11:00 -04008372static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008373 .sched_state_renewal = nfs4_proc_async_renew,
Andy Adamsona7b72102009-04-01 09:22:46 -04008374 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008375 .renew_lease = nfs4_proc_renew,
Benny Halevy29fba382009-04-01 09:22:44 -04008376};
8377
8378#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008379static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008380 .sched_state_renewal = nfs41_proc_async_sequence,
Andy Adamsona7b72102009-04-01 09:22:46 -04008381 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008382 .renew_lease = nfs4_proc_sequence,
Benny Halevy29fba382009-04-01 09:22:44 -04008383};
8384#endif
8385
Chuck Leverec011fe2013-10-17 14:12:39 -04008386static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008387 .get_locations = _nfs40_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008388 .fsid_present = _nfs40_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008389};
8390
8391#if defined(CONFIG_NFS_V4_1)
8392static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008393 .get_locations = _nfs41_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008394 .fsid_present = _nfs41_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008395};
8396#endif /* CONFIG_NFS_V4_1 */
8397
Trond Myklebust97dc1352010-06-16 09:52:26 -04008398static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8399 .minor_version = 0,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008400 .init_caps = NFS_CAP_READDIRPLUS
8401 | NFS_CAP_ATOMIC_OPEN
8402 | NFS_CAP_CHANGE_ATTR
8403 | NFS_CAP_POSIX_LOCK,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008404 .init_client = nfs40_init_client,
8405 .shutdown_client = nfs40_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008406 .match_stateid = nfs4_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008407 .find_root_sec = nfs4_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008408 .free_lock_state = nfs4_release_lockowner,
Chuck Lever9915ea72013-08-09 12:48:27 -04008409 .call_sync_ops = &nfs40_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008410 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8411 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8412 .state_renewal_ops = &nfs40_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008413 .mig_recovery_ops = &nfs40_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008414};
8415
8416#if defined(CONFIG_NFS_V4_1)
8417static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8418 .minor_version = 1,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008419 .init_caps = NFS_CAP_READDIRPLUS
8420 | NFS_CAP_ATOMIC_OPEN
8421 | NFS_CAP_CHANGE_ATTR
Trond Myklebust3b664862013-03-17 15:31:15 -04008422 | NFS_CAP_POSIX_LOCK
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04008423 | NFS_CAP_STATEID_NFSV41
8424 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008425 .init_client = nfs41_init_client,
8426 .shutdown_client = nfs41_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008427 .match_stateid = nfs41_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008428 .find_root_sec = nfs41_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008429 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008430 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008431 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8432 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8433 .state_renewal_ops = &nfs41_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008434 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008435};
8436#endif
8437
Steve Dickson42c2c422013-05-22 12:50:38 -04008438#if defined(CONFIG_NFS_V4_2)
8439static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8440 .minor_version = 2,
Bryan Schumaker70173102013-06-19 13:41:43 -04008441 .init_caps = NFS_CAP_READDIRPLUS
8442 | NFS_CAP_ATOMIC_OPEN
8443 | NFS_CAP_CHANGE_ATTR
8444 | NFS_CAP_POSIX_LOCK
8445 | NFS_CAP_STATEID_NFSV41
8446 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008447 .init_client = nfs41_init_client,
8448 .shutdown_client = nfs41_shutdown_client,
Steve Dickson42c2c422013-05-22 12:50:38 -04008449 .match_stateid = nfs41_match_stateid,
8450 .find_root_sec = nfs41_find_root_sec,
Bryan Schumaker70173102013-06-19 13:41:43 -04008451 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008452 .call_sync_ops = &nfs41_call_sync_ops,
Steve Dickson42c2c422013-05-22 12:50:38 -04008453 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8454 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8455 .state_renewal_ops = &nfs41_state_renewal_ops,
8456};
8457#endif
8458
Trond Myklebust97dc1352010-06-16 09:52:26 -04008459const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8460 [0] = &nfs_v4_0_minor_ops,
8461#if defined(CONFIG_NFS_V4_1)
8462 [1] = &nfs_v4_1_minor_ops,
8463#endif
Steve Dickson42c2c422013-05-22 12:50:38 -04008464#if defined(CONFIG_NFS_V4_2)
8465 [2] = &nfs_v4_2_minor_ops,
8466#endif
Trond Myklebust97dc1352010-06-16 09:52:26 -04008467};
8468
Trond Myklebust17f26b12013-08-21 15:48:42 -04008469static const struct inode_operations nfs4_dir_inode_operations = {
Bryan Schumaker73a79702012-07-16 16:39:12 -04008470 .create = nfs_create,
8471 .lookup = nfs_lookup,
8472 .atomic_open = nfs_atomic_open,
8473 .link = nfs_link,
8474 .unlink = nfs_unlink,
8475 .symlink = nfs_symlink,
8476 .mkdir = nfs_mkdir,
8477 .rmdir = nfs_rmdir,
8478 .mknod = nfs_mknod,
8479 .rename = nfs_rename,
8480 .permission = nfs_permission,
8481 .getattr = nfs_getattr,
8482 .setattr = nfs_setattr,
8483 .getxattr = generic_getxattr,
8484 .setxattr = generic_setxattr,
8485 .listxattr = generic_listxattr,
8486 .removexattr = generic_removexattr,
8487};
8488
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08008489static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008490 .permission = nfs_permission,
8491 .getattr = nfs_getattr,
8492 .setattr = nfs_setattr,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008493 .getxattr = generic_getxattr,
8494 .setxattr = generic_setxattr,
8495 .listxattr = generic_listxattr,
8496 .removexattr = generic_removexattr,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008497};
8498
David Howells509de812006-08-22 20:06:11 -04008499const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07008500 .version = 4, /* protocol version */
8501 .dentry_ops = &nfs4_dentry_operations,
8502 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008503 .file_inode_ops = &nfs4_file_inode_operations,
Jeff Layton1788ea62011-11-04 13:31:21 -04008504 .file_ops = &nfs4_file_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008505 .getroot = nfs4_proc_get_root,
Bryan Schumaker281cad42012-04-27 13:27:45 -04008506 .submount = nfs4_submount,
Bryan Schumakerff9099f22012-07-30 16:05:18 -04008507 .try_mount = nfs4_try_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008508 .getattr = nfs4_proc_getattr,
8509 .setattr = nfs4_proc_setattr,
8510 .lookup = nfs4_proc_lookup,
8511 .access = nfs4_proc_access,
8512 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008513 .create = nfs4_proc_create,
8514 .remove = nfs4_proc_remove,
8515 .unlink_setup = nfs4_proc_unlink_setup,
Bryan Schumaker34e137c2012-03-19 14:54:41 -04008516 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008517 .unlink_done = nfs4_proc_unlink_done,
Jeff Laytond3d41522010-09-17 17:31:57 -04008518 .rename_setup = nfs4_proc_rename_setup,
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04008519 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
Jeff Laytond3d41522010-09-17 17:31:57 -04008520 .rename_done = nfs4_proc_rename_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008521 .link = nfs4_proc_link,
8522 .symlink = nfs4_proc_symlink,
8523 .mkdir = nfs4_proc_mkdir,
8524 .rmdir = nfs4_proc_remove,
8525 .readdir = nfs4_proc_readdir,
8526 .mknod = nfs4_proc_mknod,
8527 .statfs = nfs4_proc_statfs,
8528 .fsinfo = nfs4_proc_fsinfo,
8529 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04008530 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008531 .decode_dirent = nfs4_decode_dirent,
Anna Schumakera4cdda52014-05-06 09:12:31 -04008532 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008533 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05008534 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008535 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008536 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008537 .commit_setup = nfs4_proc_commit_setup,
Fred Isaman0b7c0152012-04-20 14:47:39 -04008538 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008539 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008540 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00008541 .clear_acl_cache = nfs4_zap_acl_attr,
Trond Myklebust7fe5c392009-03-19 15:35:50 -04008542 .close_context = nfs4_close_context,
Trond Myklebust2b484292010-09-17 10:56:51 -04008543 .open_context = nfs4_atomic_open,
Bryan Schumaker011e2a72012-06-20 15:53:43 -04008544 .have_delegation = nfs4_have_delegation,
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04008545 .return_delegation = nfs4_inode_return_delegation,
Bryan Schumaker6663ee72012-06-20 15:53:46 -04008546 .alloc_client = nfs4_alloc_client,
Andy Adamson45a52a02011-03-01 01:34:08 +00008547 .init_client = nfs4_init_client,
Bryan Schumakercdb7ece2012-06-20 15:53:45 -04008548 .free_client = nfs4_free_client,
Bryan Schumaker1179acc2012-07-30 16:05:19 -04008549 .create_server = nfs4_create_server,
8550 .clone_server = nfs_clone_server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008551};
8552
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008553static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8554 .prefix = XATTR_NAME_NFSV4_ACL,
8555 .list = nfs4_xattr_list_nfs4_acl,
8556 .get = nfs4_xattr_get_nfs4_acl,
8557 .set = nfs4_xattr_set_nfs4_acl,
8558};
8559
8560const struct xattr_handler *nfs4_xattr_handlers[] = {
8561 &nfs4_xattr_nfs4_acl_handler,
David Quigleyc9bccef2013-05-22 12:50:45 -04008562#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8563 &nfs4_xattr_nfs4_label_handler,
8564#endif
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008565 NULL
8566};
8567
Linus Torvalds1da177e2005-04-16 15:20:36 -07008568/*
8569 * Local variables:
8570 * c-basic-offset: 8
8571 * End:
8572 */