projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Common versions of sequence helper functions
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
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>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#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>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static 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);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static 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 *);
f062eb6c 93#endif
aa9c2669
DQ		 94
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
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315
BS		 154 case -NFS4ERR_WRONGSEC:
155 return -EPERM;
3ddeb7c5
TM		 156 case -NFS4ERR_BADOWNER:
157 case -NFS4ERR_BADNAME:
158 return -EINVAL;
fb13bfa7
TM		 159 case -NFS4ERR_SHARE_DENIED:
160 return -EACCES;
f25efd85
SD		 161 case -NFS4ERR_MINOR_VERS_MISMATCH:
162 return -EPROTONOSUPPORT;
6168f62c
WAA		 163 case -NFS4ERR_ACCESS:
164 return -EACCES;
6e3cf241
TM		 165 case -NFS4ERR_FILE_OPEN:
166 return -EBUSY;
52567b03 167 default:
1da177e4 168 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 169 __func__, -err);
52567b03 170 break;
1da177e4 171 }
52567b03 172 return -EIO;
1da177e4
LT		 173}
174
175/*
176 * This is our standard bitmap for GETATTR requests.
177 */
1549210f 178const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 179 FATTR4_WORD0_TYPE
180 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_SIZE
182 | FATTR4_WORD0_FSID
183 | FATTR4_WORD0_FILEID,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 192 | FATTR4_WORD1_TIME_MODIFY,
193#ifdef CONFIG_NFS_V4_SECURITY_LABEL
194 FATTR4_WORD2_SECURITY_LABEL
195#endif
1da177e4
LT		 196};
197
1549210f
TM		 198static const u32 nfs4_pnfs_open_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY,
213 FATTR4_WORD2_MDSTHRESHOLD
214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 244};
245
a09df2ca 246const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 247 FATTR4_WORD0_TYPE
248 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_SIZE
250 | FATTR4_WORD0_FSID
251 | FATTR4_WORD0_FILEID
252 | FATTR4_WORD0_FS_LOCATIONS,
253 FATTR4_WORD1_MODE
254 | FATTR4_WORD1_NUMLINKS
255 | FATTR4_WORD1_OWNER
256 | FATTR4_WORD1_OWNER_GROUP
257 | FATTR4_WORD1_RAWDEV
258 | FATTR4_WORD1_SPACE_USED
259 | FATTR4_WORD1_TIME_ACCESS
260 | FATTR4_WORD1_TIME_METADATA
261 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 262 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 263};
264
bc4785cd 265static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 266 struct nfs4_readdir_arg *readdir)
267{
0dbb4c67 268 __be32 *start, *p;
1da177e4 269
1da177e4 270 if (cookie > 2) {
b7ef1956 271 readdir->cookie = cookie;
1da177e4
LT		 272 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 return;
274 }
275
276 readdir->cookie = 0;
277 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 if (cookie == 2)
279 return;
280
281 /*
282 * NFSv4 servers do not return entries for '.' and '..'
283 * Therefore, we fake these entries here. We let '.'
284 * have cookie 0 and '..' have cookie 1. Note that
285 * when talking to the server, we always send cookie 0
286 * instead of 1 or 2.
287 */
2b86ce2d 288 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 289
290 if (cookie == 0) {
291 *p++ = xdr_one; /* next */
292 *p++ = xdr_zero; /* cookie, first word */
293 *p++ = xdr_one; /* cookie, second word */
294 *p++ = xdr_one; /* entry len */
295 memcpy(p, ".\0\0\0", 4); /* entry */
296 p++;
297 *p++ = xdr_one; /* bitmap length */
298 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
299 *p++ = htonl(8); /* attribute buffer length */
4e769b93 300 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 301 }
302
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_two; /* cookie, second word */
306 *p++ = xdr_two; /* entry len */
307 memcpy(p, "..\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
4e769b93 312 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 313
314 readdir->pgbase = (char *)p - (char *)start;
315 readdir->count -= readdir->pgbase;
2b86ce2d 316 kunmap_atomic(start);
1da177e4
LT		 317}
318
65de872e
TM		 319static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
320{
321 int res = 0;
322
323 might_sleep();
324
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 329 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 330 if (fatal_signal_pending(current))
331 res = -ERESTARTSYS;
332 *timeout <<= 1;
333 return res;
334}
335
336/* This is the error handling routine for processes that are allowed
337 * to sleep.
338 */
b064eca2 339static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 340{
341 struct nfs_client *clp = server->nfs_client;
9e33bed5 342 struct nfs4_state *state = exception->state;
3114ea7a 343 struct inode *inode = exception->inode;
65de872e
TM		 344 int ret = errorcode;
345
346 exception->retry = 0;
347 switch(errorcode) {
348 case 0:
349 return 0;
3114ea7a 350 case -NFS4ERR_OPENMODE:
011e2a7f 351 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 352 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 353 exception->retry = 1;
354 return 0;
355 }
356 if (state == NULL)
357 break;
5d422301
TM		 358 ret = nfs4_schedule_stateid_recovery(server, state);
359 if (ret < 0)
360 break;
3114ea7a 361 goto wait_on_recovery;
a1d0b5ee 362 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 365 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
366 nfs_remove_bad_delegation(inode);
367 exception->retry = 1;
368 break;
369 }
9e33bed5
TM		 370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
0400a6b0 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
03391693 386#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 387 case -NFS4ERR_BADSESSION:
388 case -NFS4ERR_BADSLOT:
389 case -NFS4ERR_BAD_HIGH_SLOT:
390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
391 case -NFS4ERR_DEADSESSION:
392 case -NFS4ERR_SEQ_FALSE_RETRY:
393 case -NFS4ERR_SEQ_MISORDERED:
394 dprintk("%s ERROR: %d Reset session\n", __func__,
395 errorcode);
9f594791 396 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 397 goto wait_on_recovery;
03391693 398#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 399 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 400 if (exception->timeout > HZ) {
401 /* We have retried a decent amount, time to
402 * fail
403 */
404 ret = -EBUSY;
405 break;
406 }
65de872e
TM		 407 case -NFS4ERR_GRACE:
408 case -NFS4ERR_DELAY:
409 ret = nfs4_delay(server->client, &exception->timeout);
410 if (ret != 0)
411 break;
a8a4ae3a 412 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 413 case -NFS4ERR_OLD_STATEID:
414 exception->retry = 1;
b064eca2
TM		 415 break;
416 case -NFS4ERR_BADOWNER:
417 /* The following works around a Linux server bug! */
418 case -NFS4ERR_BADNAME:
419 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
420 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
421 exception->retry = 1;
422 printk(KERN_WARNING "NFS: v4 server %s "
423 "does not accept raw "
424 "uid/gids. "
425 "Reenabling the idmapper.\n",
426 server->nfs_client->cl_hostname);
427 }
65de872e
TM		 428 }
429 /* We failed to handle the error */
430 return nfs4_map_errors(ret);
0400a6b0 431wait_on_recovery:
a2c0b9e2
TM		 432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret == 0)
434 exception->retry = 1;
435 return ret;
65de872e
TM		 436}
437
a5250def
WAA		 438/*
439 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
440 * or 'false' otherwise.
441 */
442static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
443{
444 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
445
446 if (flavor == RPC_AUTH_GSS_KRB5I ||
447 flavor == RPC_AUTH_GSS_KRB5P)
448 return true;
449
450 return false;
451}
65de872e 452
452e9352 453static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 454{
1da177e4
LT		 455 spin_lock(&clp->cl_lock);
456 if (time_before(clp->cl_last_renewal,timestamp))
457 clp->cl_last_renewal = timestamp;
458 spin_unlock(&clp->cl_lock);
459}
460
452e9352
TM		 461static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
462{
463 do_renew_lease(server->nfs_client, timestamp);
464}
465
2a3eb2b9
CL		 466struct nfs4_call_sync_data {
467 const struct nfs_server *seq_server;
468 struct nfs4_sequence_args *seq_args;
469 struct nfs4_sequence_res *seq_res;
470};
471
a9c92d6b
CL		 472static void nfs4_init_sequence(struct nfs4_sequence_args *args,
473 struct nfs4_sequence_res *res, int cache_reply)
474{
475 args->sa_slot = NULL;
476 args->sa_cache_this = cache_reply;
477 args->sa_privileged = 0;
478
479 res->sr_slot = NULL;
480}
481
482static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
483{
484 args->sa_privileged = 1;
485}
486
cccef3b9
AA		 487#if defined(CONFIG_NFS_V4_1)
488
d185a334 489static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 490{
e3725ec0 491 struct nfs4_session *session;
13615871 492 struct nfs4_slot_table *tbl;
c10e4498 493 bool send_new_highest_used_slotid = false;
13615871 494
dfb4f309 495 if (!res->sr_slot) {
13615871
AA		 496 /* just wake up the next guy waiting since
497 * we may have not consumed a slot after all */
691daf3b 498 dprintk("%s: No slot\n", __func__);
35dc1d74 499 return;
13615871 500 }
e3725ec0
TM		 501 tbl = res->sr_slot->table;
502 session = tbl->session;
ea028ac9 503
35dc1d74 504 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 505 /* Be nice to the server: try to ensure that the last transmitted
506 * value for highest_user_slotid <= target_highest_slotid
507 */
508 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
509 send_new_highest_used_slotid = true;
510
b75ad4cd
TM		 511 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
512 send_new_highest_used_slotid = false;
513 goto out_unlock;
514 }
f4af6e2a 515 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 516
517 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
518 send_new_highest_used_slotid = false;
b75ad4cd 519out_unlock:
35dc1d74 520 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 521 res->sr_slot = NULL;
c10e4498
TM		 522 if (send_new_highest_used_slotid)
523 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 524}
525
14516c3a 526static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 527{
e3725ec0 528 struct nfs4_session *session;
933602e3 529 struct nfs4_slot *slot;
14516c3a 530 struct nfs_client *clp;
ac20d163 531 bool interrupted = false;
85563073 532 int ret = 1;
b0df806c 533
468f8613
BS		 534 /* don't increment the sequence number if the task wasn't sent */
535 if (!RPC_WAS_SENT(task))
b0df806c
AA		 536 goto out;
537
933602e3 538 slot = res->sr_slot;
e3725ec0 539 session = slot->table->session;
933602e3 540
ac20d163
TM		 541 if (slot->interrupted) {
542 slot->interrupted = 0;
543 interrupted = true;
544 }
545
2f92ae34 546 trace_nfs4_sequence_done(session, res);
691daf3b 547 /* Check the SEQUENCE operation status */
14516c3a
TM		 548 switch (res->sr_status) {
549 case 0:
b0df806c 550 /* Update the slot's sequence and clientid lease timer */
933602e3 551 ++slot->seq_nr;
e3725ec0 552 clp = session->clp;
8e63b6a8 553 do_renew_lease(clp, res->sr_timestamp);
0629e370 554 /* Check sequence flags */
b4410c2f
TM		 555 if (res->sr_status_flags != 0)
556 nfs4_schedule_lease_recovery(clp);
464ee9f9 557 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 558 break;
ac20d163
TM		 559 case 1:
560 /*
561 * sr_status remains 1 if an RPC level error occurred.
562 * The server may or may not have processed the sequence
563 * operation..
564 * Mark the slot as having hosted an interrupted RPC call.
565 */
566 slot->interrupted = 1;
567 goto out;
14516c3a
TM		 568 case -NFS4ERR_DELAY:
569 /* The server detected a resend of the RPC call and
570 * returned NFS4ERR_DELAY as per Section 2.10.6.2
571 * of RFC5661.
572 */
df2fabff 573 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 574 __func__,
df2fabff 575 slot->slot_nr,
933602e3 576 slot->seq_nr);
14516c3a 577 goto out_retry;
85563073
TM		 578 case -NFS4ERR_BADSLOT:
579 /*
580 * The slot id we used was probably retired. Try again
581 * using a different slot id.
582 */
e8794440
TM		 583 goto retry_nowait;
584 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 585 /*
586 * Was the last operation on this sequence interrupted?
587 * If so, retry after bumping the sequence number.
588 */
589 if (interrupted) {
590 ++slot->seq_nr;
591 goto retry_nowait;
592 }
e8794440
TM		 593 /*
594 * Could this slot have been previously retired?
595 * If so, then the server may be expecting seq_nr = 1!
596 */
8e63b6a8
TM		 597 if (slot->seq_nr != 1) {
598 slot->seq_nr = 1;
599 goto retry_nowait;
600 }
601 break;
e8794440
TM		 602 case -NFS4ERR_SEQ_FALSE_RETRY:
603 ++slot->seq_nr;
604 goto retry_nowait;
14516c3a
TM		 605 default:
606 /* Just update the slot sequence no. */
933602e3 607 ++slot->seq_nr;
b0df806c
AA		 608 }
609out:
610 /* The session may be reset by one of the error handlers. */
611 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 612 nfs41_sequence_free_slot(res);
85563073 613 return ret;
e8794440
TM		 614retry_nowait:
615 if (rpc_restart_call_prepare(task)) {
616 task->tk_status = 0;
617 ret = 0;
618 }
619 goto out;
14516c3a 620out_retry:
d05dd4e9 621 if (!rpc_restart_call(task))
14516c3a
TM		 622 goto out;
623 rpc_delay(task, NFS4_POLL_RETRY_MAX);
624 return 0;
b0df806c
AA		 625}
626
14516c3a
TM		 627static int nfs4_sequence_done(struct rpc_task *task,
628 struct nfs4_sequence_res *res)
df896455 629{
e3725ec0 630 if (res->sr_slot == NULL)
14516c3a
TM		 631 return 1;
632 return nfs41_sequence_done(task, res);
df896455
TM		 633}
634
dc70d7b3 635int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 636 struct nfs4_sequence_args *args,
637 struct nfs4_sequence_res *res,
ce5039c1
AA		 638 struct rpc_task *task)
639{
fbcd4abc
AA		 640 struct nfs4_slot *slot;
641 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 642
643 dprintk("--> %s\n", __func__);
ce5039c1 644 /* slot already allocated? */
dfb4f309 645 if (res->sr_slot != NULL)
d9afbd1b 646 goto out_success;
ce5039c1 647
fbcd4abc
AA		 648 tbl = &session->fc_slot_table;
649
69d206b5
TM		 650 task->tk_timeout = 0;
651
fbcd4abc 652 spin_lock(&tbl->slot_tbl_lock);
774d5f14 653 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 654 !args->sa_privileged) {
0b1c8fc4 655 /* The state manager will wait until the slot table is empty */
0b1c8fc4 656 dprintk("%s session is draining\n", __func__);
7b939a3f 657 goto out_sleep;
689cf5c1
AB		 658 }
659
2dc03b7f 660 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 661 if (IS_ERR(slot)) {
662 /* If out of memory, try again in 1/4 second */
663 if (slot == ERR_PTR(-ENOMEM))
664 task->tk_timeout = HZ >> 2;
fbcd4abc 665 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 666 goto out_sleep;
fbcd4abc
AA		 667 }
668 spin_unlock(&tbl->slot_tbl_lock);
669
2b2fa717 670 args->sa_slot = slot;
fbcd4abc 671
e8d92382 672 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 673 slot->slot_nr, slot->seq_nr);
fbcd4abc 674
dfb4f309 675 res->sr_slot = slot;
8e63b6a8 676 res->sr_timestamp = jiffies;
2a6e26cd 677 res->sr_status_flags = 0;
fbcd4abc
AA		 678 /*
679 * sr_status is only set in decode_sequence, and so will remain
680 * set to 1 if an rpc level failure occurs.
681 */
682 res->sr_status = 1;
2f92ae34 683 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 684out_success:
685 rpc_call_start(task);
ce5039c1 686 return 0;
7b939a3f 687out_sleep:
8fe72bac
TM		 688 /* Privileged tasks are queued with top priority */
689 if (args->sa_privileged)
1e1093c7
TM		 690 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
691 NULL, RPC_PRIORITY_PRIVILEGED);
692 else
693 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 694 spin_unlock(&tbl->slot_tbl_lock);
695 return -EAGAIN;
ce5039c1 696}
dc70d7b3 697EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 698
5a580e0a
CL		 699static int nfs4_setup_sequence(const struct nfs_server *server,
700 struct nfs4_sequence_args *args,
701 struct nfs4_sequence_res *res,
702 struct rpc_task *task)
ce5039c1 703{
035168ab 704 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 705 int ret = 0;
706
d9afbd1b
TM		 707 if (session == NULL) {
708 rpc_call_start(task);
035168ab 709 goto out;
d9afbd1b 710 }
035168ab 711
e8d92382 712 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 713 __func__, session->clp, session, res->sr_slot ?
e8d92382 714 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 715
9d12b216 716 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 717out:
718 dprintk("<-- %s status=%d\n", __func__, ret);
719 return ret;
720}
721
ce5039c1
AA		 722static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
723{
2a3eb2b9 724 struct nfs4_call_sync_data *data = calldata;
6ba7db34 725 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 726
035168ab
TM		 727 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
728
d9afbd1b 729 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 730}
731
69ab40c4
AA		 732static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
733{
2a3eb2b9 734 struct nfs4_call_sync_data *data = calldata;
69ab40c4 735
14516c3a 736 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 737}
738
17280175 739static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 740 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 741 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 742};
743
7c513058
BS		 744static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
745 struct nfs_server *server,
ce5039c1
AA		 746 struct rpc_message *msg,
747 struct nfs4_sequence_args *args,
8fe72bac 748 struct nfs4_sequence_res *res)
ce5039c1
AA		 749{
750 int ret;
751 struct rpc_task *task;
2a3eb2b9 752 struct nfs4_call_sync_data data = {
035168ab 753 .seq_server = server,
ce5039c1
AA		 754 .seq_args = args,
755 .seq_res = res,
ce5039c1
AA		 756 };
757 struct rpc_task_setup task_setup = {
7c513058 758 .rpc_client = clnt,
ce5039c1
AA		 759 .rpc_message = msg,
760 .callback_ops = &nfs41_call_sync_ops,
761 .callback_data = &data
762 };
763
ce5039c1
AA		 764 task = rpc_run_task(&task_setup);
765 if (IS_ERR(task))
766 ret = PTR_ERR(task);
767 else {
768 ret = task->tk_status;
769 rpc_put_task(task);
770 }
771 return ret;
772}
773
df896455 774#else
5a580e0a
CL		 775static int nfs4_setup_sequence(const struct nfs_server *server,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 struct rpc_task *task)
779{
780 rpc_call_start(task);
781 return 0;
782}
8fe72bac 783
14516c3a
TM		 784static int nfs4_sequence_done(struct rpc_task *task,
785 struct nfs4_sequence_res *res)
df896455 786{
14516c3a 787 return 1;
df896455 788}
cccef3b9
AA		 789#endif /* CONFIG_NFS_V4_1 */
790
fd0c0953 791static
7c513058
BS		 792int _nfs4_call_sync(struct rpc_clnt *clnt,
793 struct nfs_server *server,
cccef3b9
AA		 794 struct rpc_message *msg,
795 struct nfs4_sequence_args *args,
fd0c0953 796 struct nfs4_sequence_res *res)
cccef3b9 797{
7c513058 798 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 799}
800
fd0c0953 801static
7c513058
BS		 802int nfs4_call_sync(struct rpc_clnt *clnt,
803 struct nfs_server *server,
e73b83f2
BS		 804 struct rpc_message *msg,
805 struct nfs4_sequence_args *args,
806 struct nfs4_sequence_res *res,
807 int cache_reply)
808{
a9c92d6b 809 nfs4_init_sequence(args, res, cache_reply);
7c513058 810 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 811 args, res);
e73b83f2 812}
cccef3b9 813
38478b24 814static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 815{
38478b24 816 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 817
38478b24 818 spin_lock(&dir->i_lock);
359d7d1c 819 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 820 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 821 nfs_force_lookup_revalidate(dir);
a9a4a87a 822 dir->i_version = cinfo->after;
de242c0b 823 nfs_fscache_invalidate(dir);
38478b24 824 spin_unlock(&dir->i_lock);
1da177e4
LT		 825}
826
e56e0b78 827struct nfs4_opendata {
c6d00e63 828 struct kref kref;
e56e0b78
TM		 829 struct nfs_openargs o_arg;
830 struct nfs_openres o_res;
cdd4e68b
TM		 831 struct nfs_open_confirmargs c_arg;
832 struct nfs_open_confirmres c_res;
6926afd1
TM		 833 struct nfs4_string owner_name;
834 struct nfs4_string group_name;
e56e0b78 835 struct nfs_fattr f_attr;
1775fd3e 836 struct nfs4_label *f_label;
e56e0b78 837 struct dentry *dir;
82a2c1b7 838 struct dentry *dentry;
e56e0b78 839 struct nfs4_state_owner *owner;
aac00a8d 840 struct nfs4_state *state;
e56e0b78 841 struct iattr attrs;
26e976a8 842 unsigned long timestamp;
3e309914 843 unsigned int rpc_done : 1;
bdeca1b7 844 unsigned int is_recover : 1;
24ac23ab
TM		 845 int rpc_status;
846 int cancelled;
e56e0b78
TM		 847};
848
49f9a0fa
TM		 849static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
850 int err, struct nfs4_exception *exception)
851{
852 if (err != -EINVAL)
853 return false;
854 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
855 return false;
856 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
857 exception->retry = 1;
858 return true;
859}
860
861static enum open_claim_type4
862nfs4_map_atomic_open_claim(struct nfs_server *server,
863 enum open_claim_type4 claim)
864{
865 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
866 return claim;
867 switch (claim) {
868 default:
869 return claim;
870 case NFS4_OPEN_CLAIM_FH:
871 return NFS4_OPEN_CLAIM_NULL;
872 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
873 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
874 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
875 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
876 }
877}
2ced46c2
TM		 878
879static void nfs4_init_opendata_res(struct nfs4_opendata *p)
880{
881 p->o_res.f_attr = &p->f_attr;
1775fd3e 882 p->o_res.f_label = p->f_label;
c1d51931
TM		 883 p->o_res.seqid = p->o_arg.seqid;
884 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 885 p->o_res.server = p->o_arg.server;
5f657530 886 p->o_res.access_request = p->o_arg.access;
2ced46c2 887 nfs_fattr_init(&p->f_attr);
6926afd1 888 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 889}
890
82a2c1b7 891static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 892 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 893 const struct iattr *attrs,
1775fd3e 894 struct nfs4_label *label,
4a1c0893 895 enum open_claim_type4 claim,
8535b2be 896 gfp_t gfp_mask)
e56e0b78 897{
82a2c1b7 898 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 899 struct inode *dir = parent->d_inode;
900 struct nfs_server *server = NFS_SERVER(dir);
901 struct nfs4_opendata *p;
902
8535b2be 903 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 904 if (p == NULL)
905 goto err;
14c43f76
DQ		 906
907 p->f_label = nfs4_label_alloc(server, gfp_mask);
908 if (IS_ERR(p->f_label))
909 goto err_free_p;
910
8535b2be 911 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 912 if (p->o_arg.seqid == NULL)
14c43f76 913 goto err_free_label;
82a2c1b7
AV		 914 nfs_sb_active(dentry->d_sb);
915 p->dentry = dget(dentry);
e56e0b78
TM		 916 p->dir = parent;
917 p->owner = sp;
918 atomic_inc(&sp->so_count);
dc0b027d
TM		 919 p->o_arg.open_flags = flags;
920 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 921 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
922 * will return permission denied for all bits until close */
923 if (!(flags & O_EXCL)) {
924 /* ask server to check for all possible rights as results
925 * are cached */
926 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
927 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 928 }
7539bbab 929 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 930 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
931 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 932 p->o_arg.name = &dentry->d_name;
e56e0b78 933 p->o_arg.server = server;
aa9c2669 934 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 935 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 936 p->o_arg.label = label;
49f9a0fa
TM		 937 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
938 switch (p->o_arg.claim) {
4a1c0893
TM		 939 case NFS4_OPEN_CLAIM_NULL:
940 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
941 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
942 p->o_arg.fh = NFS_FH(dir);
943 break;
944 case NFS4_OPEN_CLAIM_PREVIOUS:
945 case NFS4_OPEN_CLAIM_FH:
946 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
947 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
948 p->o_arg.fh = NFS_FH(dentry->d_inode);
949 }
536e43d1 950 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 951 __u32 verf[2];
d77d76ff 952
e56e0b78
TM		 953 p->o_arg.u.attrs = &p->attrs;
954 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 955
956 verf[0] = jiffies;
957 verf[1] = current->pid;
958 memcpy(p->o_arg.u.verifier.data, verf,
959 sizeof(p->o_arg.u.verifier.data));
e56e0b78 960 }
cdd4e68b
TM		 961 p->c_arg.fh = &p->o_res.fh;
962 p->c_arg.stateid = &p->o_res.stateid;
963 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 964 nfs4_init_opendata_res(p);
c6d00e63 965 kref_init(&p->kref);
e56e0b78 966 return p;
14c43f76
DQ		 967
968err_free_label:
969 nfs4_label_free(p->f_label);
970err_free_p:
e56e0b78
TM		 971 kfree(p);
972err:
973 dput(parent);
974 return NULL;
975}
976
c6d00e63 977static void nfs4_opendata_free(struct kref *kref)
e56e0b78 978{
c6d00e63
TM		 979 struct nfs4_opendata *p = container_of(kref,
980 struct nfs4_opendata, kref);
82a2c1b7 981 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 982
983 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 984 if (p->state != NULL)
985 nfs4_put_open_state(p->state);
c6d00e63 986 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 987
988 nfs4_label_free(p->f_label);
989
c6d00e63 990 dput(p->dir);
82a2c1b7
AV		 991 dput(p->dentry);
992 nfs_sb_deactive(sb);
6926afd1 993 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 994 kfree(p);
995}
996
997static void nfs4_opendata_put(struct nfs4_opendata *p)
998{
999 if (p != NULL)
1000 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1001}
1002
06f814a3
TM		 1003static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1004{
06f814a3
TM		 1005 int ret;
1006
06f814a3 1007 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1008 return ret;
1009}
1010
dc0b027d 1011static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1012{
1013 int ret = 0;
dc0b027d 1014
536e43d1 1015 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1016 goto out;
1017 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1018 case FMODE_READ:
88069f77
TM		 1019 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1020 && state->n_rdonly != 0;
6ee41268
TM		 1021 break;
1022 case FMODE_WRITE:
88069f77
TM		 1023 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1024 && state->n_wronly != 0;
6ee41268
TM		 1025 break;
1026 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1027 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1028 && state->n_rdwr != 0;
6ee41268 1029 }
dc0b027d 1030out:
6ee41268
TM		 1031 return ret;
1032}
1033
dc0b027d 1034static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1035{
652f89f6
TM		 1036 if (delegation == NULL)
1037 return 0;
dc0b027d 1038 if ((delegation->type & fmode) != fmode)
aac00a8d 1039 return 0;
15c831bf 1040 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1041 return 0;
d25be546
TM		 1042 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1043 return 0;
b7391f44 1044 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1045 return 1;
1046}
1047
dc0b027d 1048static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1049{
dc0b027d 1050 switch (fmode) {
e7616923
TM		 1051 case FMODE_WRITE:
1052 state->n_wronly++;
1053 break;
1054 case FMODE_READ:
1055 state->n_rdonly++;
1056 break;
1057 case FMODE_READ|FMODE_WRITE:
1058 state->n_rdwr++;
1059 }
dc0b027d 1060 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1061}
1062
dc0b027d 1063static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1064{
1065 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1066 nfs4_stateid_copy(&state->stateid, stateid);
1067 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1068 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1069 switch (fmode) {
003707c7
TM		 1070 case FMODE_READ:
1071 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1072 break;
1073 case FMODE_WRITE:
1074 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1075 break;
1076 case FMODE_READ|FMODE_WRITE:
1077 set_bit(NFS_O_RDWR_STATE, &state->flags);
1078 }
e7616923
TM		 1079}
1080
dc0b027d 1081static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1082{
8bda4e4c 1083 write_seqlock(&state->seqlock);
dc0b027d 1084 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1085 write_sequnlock(&state->seqlock);
003707c7
TM		 1086}
1087
dc0b027d 1088static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1089{
8bda4e4c
TM		 1090 /*
1091 * Protect the call to nfs4_state_set_mode_locked and
1092 * serialise the stateid update
1093 */
1094 write_seqlock(&state->seqlock);
003707c7 1095 if (deleg_stateid != NULL) {
f597c537 1096 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1097 set_bit(NFS_DELEGATED_STATE, &state->flags);
1098 }
1099 if (open_stateid != NULL)
dc0b027d 1100 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1101 write_sequnlock(&state->seqlock);
1102 spin_lock(&state->owner->so_lock);
dc0b027d 1103 update_open_stateflags(state, fmode);
ec073428 1104 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1105}
1106
dc0b027d 1107static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1108{
1109 struct nfs_inode *nfsi = NFS_I(state->inode);
1110 struct nfs_delegation *deleg_cur;
1111 int ret = 0;
1112
dc0b027d 1113 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1114
1115 rcu_read_lock();
1116 deleg_cur = rcu_dereference(nfsi->delegation);
1117 if (deleg_cur == NULL)
1118 goto no_delegation;
1119
1120 spin_lock(&deleg_cur->lock);
17f26b12 1121 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1122 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1123 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1124 goto no_delegation_unlock;
1125
1126 if (delegation == NULL)
1127 delegation = &deleg_cur->stateid;
f597c537 1128 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1129 goto no_delegation_unlock;
1130
b7391f44 1131 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1132 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1133 ret = 1;
1134no_delegation_unlock:
1135 spin_unlock(&deleg_cur->lock);
1136no_delegation:
1137 rcu_read_unlock();
1138
1139 if (!ret && open_stateid != NULL) {
dc0b027d 1140 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1141 ret = 1;
1142 }
1143
1144 return ret;
1145}
1146
1147
dc0b027d 1148static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1149{
1150 struct nfs_delegation *delegation;
1151
1152 rcu_read_lock();
1153 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1154 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1155 rcu_read_unlock();
1156 return;
1157 }
1158 rcu_read_unlock();
57ec14c5 1159 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1160}
1161
6ee41268 1162static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1163{
1164 struct nfs4_state *state = opendata->state;
1165 struct nfs_inode *nfsi = NFS_I(state->inode);
1166 struct nfs_delegation *delegation;
f448badd 1167 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1168 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1169 nfs4_stateid stateid;
1170 int ret = -EAGAIN;
1171
aac00a8d 1172 for (;;) {
dc0b027d 1173 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1174 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1175 if (can_open_cached(state, fmode, open_mode)) {
1176 update_open_stateflags(state, fmode);
6ee41268 1177 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1178 goto out_return_state;
1179 }
1180 spin_unlock(&state->owner->so_lock);
1181 }
34310430
TM		 1182 rcu_read_lock();
1183 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1184 if (!can_open_delegated(delegation, fmode)) {
34310430 1185 rcu_read_unlock();
aac00a8d 1186 break;
34310430 1187 }
aac00a8d 1188 /* Save the delegation */
f597c537 1189 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1190 rcu_read_unlock();
fa332941 1191 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1192 if (!opendata->is_recover) {
1193 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1194 if (ret != 0)
1195 goto out;
1196 }
aac00a8d 1197 ret = -EAGAIN;
34310430
TM		 1198
1199 /* Try to update the stateid using the delegation */
dc0b027d 1200 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1201 goto out_return_state;
aac00a8d 1202 }
aac00a8d
TM		 1203out:
1204 return ERR_PTR(ret);
1205out_return_state:
1206 atomic_inc(&state->count);
1207 return state;
1208}
1209
e23008ec
AA		 1210static void
1211nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1212{
1213 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1214 struct nfs_delegation *delegation;
1215 int delegation_flags = 0;
1216
1217 rcu_read_lock();
1218 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1219 if (delegation)
1220 delegation_flags = delegation->flags;
1221 rcu_read_unlock();
1222 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1223 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1224 "returning a delegation for "
1225 "OPEN(CLAIM_DELEGATE_CUR)\n",
1226 clp->cl_hostname);
1227 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1228 nfs_inode_set_delegation(state->inode,
1229 data->owner->so_cred,
1230 &data->o_res);
1231 else
1232 nfs_inode_reclaim_delegation(state->inode,
1233 data->owner->so_cred,
1234 &data->o_res);
1235}
1236
1237/*
1238 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1239 * and update the nfs4_state.
1240 */
1241static struct nfs4_state *
1242_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1243{
1244 struct inode *inode = data->state->inode;
1245 struct nfs4_state *state = data->state;
1246 int ret;
1247
1248 if (!data->rpc_done) {
1249 ret = data->rpc_status;
1250 goto err;
1251 }
1252
1253 ret = -ESTALE;
1254 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1255 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1256 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1257 goto err;
1258
1259 ret = -ENOMEM;
1260 state = nfs4_get_open_state(inode, data->owner);
1261 if (state == NULL)
1262 goto err;
1263
1264 ret = nfs_refresh_inode(inode, &data->f_attr);
1265 if (ret)
1266 goto err;
1267
aa9c2669
DQ		 1268 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1269
e23008ec
AA		 1270 if (data->o_res.delegation_type != 0)
1271 nfs4_opendata_check_deleg(data, state);
1272 update_open_stateid(state, &data->o_res.stateid, NULL,
1273 data->o_arg.fmode);
1274
1275 return state;
1276err:
1277 return ERR_PTR(ret);
1278
1279}
1280
1281static struct nfs4_state *
1282_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1283{
1284 struct inode *inode;
1285 struct nfs4_state *state = NULL;
1b370bc2 1286 int ret;
24ac23ab 1287
aac00a8d 1288 if (!data->rpc_done) {
6ee41268 1289 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1290 goto out;
1291 }
1292
1b370bc2 1293 ret = -EAGAIN;
24ac23ab 1294 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1295 goto err;
1775fd3e 1296 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1297 ret = PTR_ERR(inode);
03f28e3a 1298 if (IS_ERR(inode))
1b370bc2
TM		 1299 goto err;
1300 ret = -ENOMEM;
24ac23ab
TM		 1301 state = nfs4_get_open_state(inode, data->owner);
1302 if (state == NULL)
1b370bc2 1303 goto err_put_inode;
e23008ec
AA		 1304 if (data->o_res.delegation_type != 0)
1305 nfs4_opendata_check_deleg(data, state);
34310430 1306 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1307 data->o_arg.fmode);
24ac23ab 1308 iput(inode);
aac00a8d 1309out:
7aa262b5 1310 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1311 return state;
1b370bc2
TM		 1312err_put_inode:
1313 iput(inode);
1314err:
1315 return ERR_PTR(ret);
24ac23ab
TM		 1316}
1317
e23008ec
AA		 1318static struct nfs4_state *
1319nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1320{
1321 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1322 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1323 return _nfs4_opendata_to_nfs4_state(data);
1324}
1325
864472e9
TM		 1326static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1327{
1328 struct nfs_inode *nfsi = NFS_I(state->inode);
1329 struct nfs_open_context *ctx;
1330
1331 spin_lock(&state->inode->i_lock);
1332 list_for_each_entry(ctx, &nfsi->open_files, list) {
1333 if (ctx->state != state)
1334 continue;
1335 get_nfs_open_context(ctx);
1336 spin_unlock(&state->inode->i_lock);
1337 return ctx;
1338 }
1339 spin_unlock(&state->inode->i_lock);
1340 return ERR_PTR(-ENOENT);
1341}
1342
4a1c0893
TM		 1343static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1344 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1345{
1346 struct nfs4_opendata *opendata;
1347
4a1c0893 1348 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1349 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1350 if (opendata == NULL)
1351 return ERR_PTR(-ENOMEM);
1352 opendata->state = state;
1353 atomic_inc(&state->count);
1354 return opendata;
1355}
1356
dc0b027d 1357static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1358{
2ced46c2 1359 struct nfs4_state *newstate;
864472e9
TM		 1360 int ret;
1361
dc0b027d
TM		 1362 opendata->o_arg.open_flags = 0;
1363 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1364 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1365 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1366 nfs4_init_opendata_res(opendata);
b257957e 1367 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1368 if (ret != 0)
1369 return ret;
2ced46c2 1370 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1371 if (IS_ERR(newstate))
1372 return PTR_ERR(newstate);
643168c2 1373 nfs4_close_state(newstate, fmode);
2ced46c2 1374 *res = newstate;
864472e9
TM		 1375 return 0;
1376}
1377
1378static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1379{
864472e9 1380 struct nfs4_state *newstate;
864472e9
TM		 1381 int ret;
1382
1383 /* memory barrier prior to reading state->n_* */
2ced46c2 1384 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1385 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1386 smp_rmb();
1387 if (state->n_rdwr != 0) {
b0ed9dbc 1388 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1389 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1390 if (ret != 0)
1391 return ret;
2ced46c2
TM		 1392 if (newstate != state)
1393 return -ESTALE;
864472e9
TM		 1394 }
1395 if (state->n_wronly != 0) {
b0ed9dbc 1396 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1397 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1398 if (ret != 0)
1399 return ret;
2ced46c2
TM		 1400 if (newstate != state)
1401 return -ESTALE;
864472e9
TM		 1402 }
1403 if (state->n_rdonly != 0) {
b0ed9dbc 1404 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1405 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1406 if (ret != 0)
1407 return ret;
2ced46c2
TM		 1408 if (newstate != state)
1409 return -ESTALE;
864472e9 1410 }
1ac7e2fd
TM		 1411 /*
1412 * We may have performed cached opens for all three recoveries.
1413 * Check if we need to update the current stateid.
1414 */
1415 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1416 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1417 write_seqlock(&state->seqlock);
1ac7e2fd 1418 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1419 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1420 write_sequnlock(&state->seqlock);
1ac7e2fd 1421 }
864472e9
TM		 1422 return 0;
1423}
1424
1da177e4
LT		 1425/*
1426 * OPEN_RECLAIM:
1427 * reclaim state on the server after a reboot.
1da177e4 1428 */
539cd03a 1429static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1430{
1ac7e2fd 1431 struct nfs_delegation *delegation;
864472e9 1432 struct nfs4_opendata *opendata;
dc0b027d 1433 fmode_t delegation_type = 0;
1da177e4
LT		 1434 int status;
1435
4a1c0893
TM		 1436 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1437 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1438 if (IS_ERR(opendata))
1439 return PTR_ERR(opendata);
1ac7e2fd
TM		 1440 rcu_read_lock();
1441 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1442 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1443 delegation_type = delegation->type;
1ac7e2fd 1444 rcu_read_unlock();
864472e9
TM		 1445 opendata->o_arg.u.delegation_type = delegation_type;
1446 status = nfs4_open_recover(opendata, state);
c6d00e63 1447 nfs4_opendata_put(opendata);
1da177e4
LT		 1448 return status;
1449}
1450
539cd03a 1451static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1452{
1453 struct nfs_server *server = NFS_SERVER(state->inode);
1454 struct nfs4_exception exception = { };
1455 int err;
1456 do {
539cd03a 1457 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1458 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1459 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1460 continue;
168667c4 1461 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1462 break;
1463 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1464 } while (exception.retry);
1465 return err;
1466}
1467
864472e9
TM		 1468static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1469{
1470 struct nfs_open_context *ctx;
1471 int ret;
1472
1473 ctx = nfs4_state_find_open_context(state);
1474 if (IS_ERR(ctx))
91876b13 1475 return -EAGAIN;
539cd03a 1476 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1477 put_nfs_open_context(ctx);
1478 return ret;
1479}
1480
db4f2e63 1481static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1482{
be76b5b6
TM		 1483 switch (err) {
1484 default:
1485 printk(KERN_ERR "NFS: %s: unhandled error "
1486 "%d.\n", __func__, err);
1487 case 0:
1488 case -ENOENT:
1489 case -ESTALE:
1490 break;
1491 case -NFS4ERR_BADSESSION:
1492 case -NFS4ERR_BADSLOT:
1493 case -NFS4ERR_BAD_HIGH_SLOT:
1494 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1495 case -NFS4ERR_DEADSESSION:
1496 set_bit(NFS_DELEGATED_STATE, &state->flags);
1497 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1498 return -EAGAIN;
1499 case -NFS4ERR_STALE_CLIENTID:
1500 case -NFS4ERR_STALE_STATEID:
1501 set_bit(NFS_DELEGATED_STATE, &state->flags);
1502 case -NFS4ERR_EXPIRED:
1503 /* Don't recall a delegation if it was lost */
1504 nfs4_schedule_lease_recovery(server->nfs_client);
1505 return -EAGAIN;
1506 case -NFS4ERR_DELEG_REVOKED:
1507 case -NFS4ERR_ADMIN_REVOKED:
1508 case -NFS4ERR_BAD_STATEID:
db4f2e63 1509 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1510 nfs_inode_find_state_and_recover(state->inode,
1511 stateid);
1512 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1513 return 0;
1514 case -NFS4ERR_DELAY:
1515 case -NFS4ERR_GRACE:
1516 set_bit(NFS_DELEGATED_STATE, &state->flags);
1517 ssleep(1);
1518 return -EAGAIN;
db4f2e63
TM		 1519 case -ENOMEM:
1520 case -NFS4ERR_DENIED:
1521 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1522 return 0;
be76b5b6 1523 }
1da177e4
LT		 1524 return err;
1525}
1526
db4f2e63
TM		 1527int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1528{
1529 struct nfs_server *server = NFS_SERVER(state->inode);
1530 struct nfs4_opendata *opendata;
1531 int err;
1532
1533 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1534 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1535 if (IS_ERR(opendata))
1536 return PTR_ERR(opendata);
1537 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1538 err = nfs4_open_recover(opendata, state);
1539 nfs4_opendata_put(opendata);
1540 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1541}
1542
cdd4e68b
TM		 1543static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1544{
1545 struct nfs4_opendata *data = calldata;
1546
1547 data->rpc_status = task->tk_status;
26e976a8 1548 if (data->rpc_status == 0) {
f597c537 1549 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1550 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1551 renew_lease(data->o_res.server, data->timestamp);
3e309914 1552 data->rpc_done = 1;
26e976a8 1553 }
cdd4e68b
TM		 1554}
1555
1556static void nfs4_open_confirm_release(void *calldata)
1557{
1558 struct nfs4_opendata *data = calldata;
1559 struct nfs4_state *state = NULL;
1560
1561 /* If this request hasn't been cancelled, do nothing */
1562 if (data->cancelled == 0)
1563 goto out_free;
1564 /* In case of error, no cleanup! */
3e309914 1565 if (!data->rpc_done)
cdd4e68b 1566 goto out_free;
cdd4e68b 1567 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1568 if (!IS_ERR(state))
643168c2 1569 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1570out_free:
c6d00e63 1571 nfs4_opendata_put(data);
cdd4e68b
TM		 1572}
1573
1574static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1575 .rpc_call_done = nfs4_open_confirm_done,
1576 .rpc_release = nfs4_open_confirm_release,
1577};
1578
1579/*
1580 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1581 */
1582static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1583{
1584 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1585 struct rpc_task *task;
5138fde0
TM		 1586 struct rpc_message msg = {
1587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1588 .rpc_argp = &data->c_arg,
1589 .rpc_resp = &data->c_res,
1590 .rpc_cred = data->owner->so_cred,
1591 };
c970aa85
TM		 1592 struct rpc_task_setup task_setup_data = {
1593 .rpc_client = server->client,
5138fde0 1594 .rpc_message = &msg,
c970aa85
TM		 1595 .callback_ops = &nfs4_open_confirm_ops,
1596 .callback_data = data,
101070ca 1597 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1598 .flags = RPC_TASK_ASYNC,
1599 };
1da177e4
LT		 1600 int status;
1601
c6d00e63 1602 kref_get(&data->kref);
3e309914
TM		 1603 data->rpc_done = 0;
1604 data->rpc_status = 0;
5138fde0 1605 data->timestamp = jiffies;
c970aa85 1606 task = rpc_run_task(&task_setup_data);
7a1218a2 1607 if (IS_ERR(task))
cdd4e68b 1608 return PTR_ERR(task);
cdd4e68b
TM		 1609 status = nfs4_wait_for_completion_rpc_task(task);
1610 if (status != 0) {
1611 data->cancelled = 1;
1612 smp_wmb();
1613 } else
1614 status = data->rpc_status;
e6b3c4db 1615 rpc_put_task(task);
1da177e4
LT		 1616 return status;
1617}
1618
24ac23ab 1619static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1620{
24ac23ab
TM		 1621 struct nfs4_opendata *data = calldata;
1622 struct nfs4_state_owner *sp = data->owner;
549b19cc 1623 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1624
24ac23ab 1625 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1626 goto out_wait;
aac00a8d
TM		 1627 /*
1628 * Check if we still need to send an OPEN call, or if we can use
1629 * a delegation instead.
1630 */
1631 if (data->state != NULL) {
1632 struct nfs_delegation *delegation;
1633
dc0b027d 1634 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1635 goto out_no_action;
aac00a8d
TM		 1636 rcu_read_lock();
1637 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1638 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1639 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1640 can_open_delegated(delegation, data->o_arg.fmode))
1641 goto unlock_no_action;
aac00a8d
TM		 1642 rcu_read_unlock();
1643 }
95b72eb0 1644 /* Update client id. */
549b19cc 1645 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1646 switch (data->o_arg.claim) {
1647 case NFS4_OPEN_CLAIM_PREVIOUS:
1648 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1649 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1650 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1651 case NFS4_OPEN_CLAIM_FH:
1652 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1653 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1654 }
26e976a8 1655 data->timestamp = jiffies;
035168ab 1656 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1657 &data->o_arg.seq_args,
2240a9e2
TM		 1658 &data->o_res.seq_res,
1659 task) != 0)
1660 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1661
1662 /* Set the create mode (note dependency on the session type) */
1663 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1664 if (data->o_arg.open_flags & O_EXCL) {
1665 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1666 if (nfs4_has_persistent_session(clp))
1667 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1668 else if (clp->cl_mvops->minor_version > 0)
1669 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1670 }
6ee41268 1671 return;
652f89f6
TM		 1672unlock_no_action:
1673 rcu_read_unlock();
6ee41268
TM		 1674out_no_action:
1675 task->tk_action = NULL;
c8da19b9 1676out_wait:
b75ad4cd 1677 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1678}
1679
24ac23ab
TM		 1680static void nfs4_open_done(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1da177e4 1683
24ac23ab 1684 data->rpc_status = task->tk_status;
d898528c 1685
14516c3a
TM		 1686 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1687 return;
d898528c 1688
24ac23ab 1689 if (task->tk_status == 0) {
807d66d8
TM		 1690 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1691 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1692 case S_IFREG:
1693 break;
1694 case S_IFLNK:
24ac23ab 1695 data->rpc_status = -ELOOP;
6f926b5b
TM		 1696 break;
1697 case S_IFDIR:
24ac23ab 1698 data->rpc_status = -EISDIR;
6f926b5b
TM		 1699 break;
1700 default:
24ac23ab 1701 data->rpc_status = -ENOTDIR;
807d66d8 1702 }
6f926b5b 1703 }
26e976a8 1704 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1705 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1706 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1707 }
3e309914 1708 data->rpc_done = 1;
24ac23ab 1709}
6f926b5b 1710
24ac23ab
TM		 1711static void nfs4_open_release(void *calldata)
1712{
1713 struct nfs4_opendata *data = calldata;
1714 struct nfs4_state *state = NULL;
1715
1716 /* If this request hasn't been cancelled, do nothing */
1717 if (data->cancelled == 0)
1718 goto out_free;
1719 /* In case of error, no cleanup! */
3e309914 1720 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1721 goto out_free;
1722 /* In case we need an open_confirm, no cleanup! */
1723 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1724 goto out_free;
24ac23ab 1725 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1726 if (!IS_ERR(state))
643168c2 1727 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1728out_free:
c6d00e63 1729 nfs4_opendata_put(data);
24ac23ab
TM		 1730}
1731
1732static const struct rpc_call_ops nfs4_open_ops = {
1733 .rpc_call_prepare = nfs4_open_prepare,
1734 .rpc_call_done = nfs4_open_done,
1735 .rpc_release = nfs4_open_release,
1736};
1737
b257957e 1738static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1739{
1740 struct inode *dir = data->dir->d_inode;
1741 struct nfs_server *server = NFS_SERVER(dir);
1742 struct nfs_openargs *o_arg = &data->o_arg;
1743 struct nfs_openres *o_res = &data->o_res;
1744 struct rpc_task *task;
5138fde0
TM		 1745 struct rpc_message msg = {
1746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1747 .rpc_argp = o_arg,
1748 .rpc_resp = o_res,
1749 .rpc_cred = data->owner->so_cred,
1750 };
c970aa85
TM		 1751 struct rpc_task_setup task_setup_data = {
1752 .rpc_client = server->client,
5138fde0 1753 .rpc_message = &msg,
c970aa85
TM		 1754 .callback_ops = &nfs4_open_ops,
1755 .callback_data = data,
101070ca 1756 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1757 .flags = RPC_TASK_ASYNC,
1758 };
24ac23ab
TM		 1759 int status;
1760
a9c92d6b 1761 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1762 kref_get(&data->kref);
3e309914
TM		 1763 data->rpc_done = 0;
1764 data->rpc_status = 0;
2ced46c2 1765 data->cancelled = 0;
bdeca1b7
TM		 1766 data->is_recover = 0;
1767 if (isrecover) {
8fe72bac 1768 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1769 data->is_recover = 1;
1770 }
c970aa85 1771 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1772 if (IS_ERR(task))
1773 return PTR_ERR(task);
1774 status = nfs4_wait_for_completion_rpc_task(task);
1775 if (status != 0) {
1776 data->cancelled = 1;
1777 smp_wmb();
1778 } else
1779 status = data->rpc_status;
1780 rpc_put_task(task);
1781
1782 return status;
1783}
1784
1785static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1786{
1787 struct inode *dir = data->dir->d_inode;
1788 struct nfs_openres *o_res = &data->o_res;
1789 int status;
1790
1791 status = nfs4_run_open_task(data, 1);
1792 if (status != 0 || !data->rpc_done)
1793 return status;
1794
6926afd1
TM		 1795 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1796
b257957e
AB		 1797 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1798 status = _nfs4_proc_open_confirm(data);
1799 if (status != 0)
1800 return status;
1801 }
1802
1803 return status;
1804}
1805
6168f62c
WAA		 1806static int nfs4_opendata_access(struct rpc_cred *cred,
1807 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1808 struct nfs4_state *state, fmode_t fmode,
1809 int openflags)
6168f62c
WAA		 1810{
1811 struct nfs_access_entry cache;
1812 u32 mask;
1813
1814 /* access call failed or for some reason the server doesn't
1815 * support any access modes -- defer access call until later */
1816 if (opendata->o_res.access_supported == 0)
1817 return 0;
1818
1819 mask = 0;
bbd3a8ee 1820 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1821 * write mode bits, but POSIX allows the creating process to write.
1822 * use openflags to check for exec, because fmode won't
1823 * always have FMODE_EXEC set when file open for exec. */
1824 if (openflags & __FMODE_EXEC) {
1825 /* ONLY check for exec rights */
1826 mask = MAY_EXEC;
1827 } else if (fmode & FMODE_READ)
1828 mask = MAY_READ;
6168f62c
WAA		 1829
1830 cache.cred = cred;
1831 cache.jiffies = jiffies;
1832 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1833 nfs_access_add_cache(state->inode, &cache);
1834
bbd3a8ee 1835 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1836 return 0;
1837
1838 /* even though OPEN succeeded, access is denied. Close the file */
1839 nfs4_close_state(state, fmode);
998f40b5 1840 return -EACCES;
6168f62c
WAA		 1841}
1842
b257957e
AB		 1843/*
1844 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1845 */
1846static int _nfs4_proc_open(struct nfs4_opendata *data)
1847{
1848 struct inode *dir = data->dir->d_inode;
1849 struct nfs_server *server = NFS_SERVER(dir);
1850 struct nfs_openargs *o_arg = &data->o_arg;
1851 struct nfs_openres *o_res = &data->o_res;
1852 int status;
1853
1854 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1855 if (!data->rpc_done)
1856 return status;
1857 if (status != 0) {
1858 if (status == -NFS4ERR_BADNAME &&
1859 !(o_arg->open_flags & O_CREAT))
1860 return -ENOENT;
24ac23ab 1861 return status;
08ef7bd3 1862 }
24ac23ab 1863
6926afd1
TM		 1864 nfs_fattr_map_and_free_names(server, &data->f_attr);
1865
90ff0c54 1866 if (o_arg->open_flags & O_CREAT)
56ae19f3 1867 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1868 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1869 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1870 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1871 status = _nfs4_proc_open_confirm(data);
1da177e4 1872 if (status != 0)
24ac23ab 1873 return status;
1da177e4
LT		 1874 }
1875 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1876 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1877 return 0;
1da177e4
LT		 1878}
1879
d83217c1
AA		 1880static int nfs4_recover_expired_lease(struct nfs_server *server)
1881{
1882 return nfs4_client_recover_expired_lease(server->nfs_client);
1883}
1884
1da177e4
LT		 1885/*
1886 * OPEN_EXPIRED:
1887 * reclaim state on the server after a network partition.
1888 * Assumes caller holds the appropriate lock
1889 */
539cd03a 1890static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1891{
e56e0b78 1892 struct nfs4_opendata *opendata;
864472e9 1893 int ret;
1da177e4 1894
4a1c0893 1895 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1896 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1897 if (IS_ERR(opendata))
1898 return PTR_ERR(opendata);
864472e9 1899 ret = nfs4_open_recover(opendata, state);
35d05778 1900 if (ret == -ESTALE)
3d4ff43d 1901 d_drop(ctx->dentry);
c6d00e63 1902 nfs4_opendata_put(opendata);
864472e9 1903 return ret;
1da177e4
LT		 1904}
1905
a9ed2e25 1906static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1907{
539cd03a 1908 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1909 struct nfs4_exception exception = { };
1910 int err;
1911
1912 do {
539cd03a 1913 err = _nfs4_open_expired(ctx, state);
42113a75 1914 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1915 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1916 continue;
a9ed2e25
TM		 1917 switch (err) {
1918 default:
1919 goto out;
1920 case -NFS4ERR_GRACE:
1921 case -NFS4ERR_DELAY:
1922 nfs4_handle_exception(server, err, &exception);
1923 err = 0;
1924 }
202b50dc 1925 } while (exception.retry);
a9ed2e25 1926out:
202b50dc
TM		 1927 return err;
1928}
1929
1da177e4
LT		 1930static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1931{
1da177e4 1932 struct nfs_open_context *ctx;
864472e9 1933 int ret;
1da177e4 1934
864472e9
TM		 1935 ctx = nfs4_state_find_open_context(state);
1936 if (IS_ERR(ctx))
91876b13 1937 return -EAGAIN;
539cd03a 1938 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1939 put_nfs_open_context(ctx);
1940 return ret;
1da177e4
LT		 1941}
1942
f062eb6c 1943#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1944static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1945{
f062eb6c 1946 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1947 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1948 struct nfs_delegation *delegation;
1949 struct rpc_cred *cred = NULL;
1950 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1951
1952 /* If a state reset has been done, test_stateid is unneeded */
1953 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1954 return;
1955
ab7cb0df
TM		 1956 /* Get the delegation credential for use by test/free_stateid */
1957 rcu_read_lock();
1958 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1959 if (delegation != NULL &&
1960 nfs4_stateid_match(&delegation->stateid, stateid)) {
1961 cred = get_rpccred(delegation->cred);
1962 rcu_read_unlock();
1963 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 1964 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 1965 } else
1966 rcu_read_unlock();
1967
3e60ffdd
CL		 1968 if (status != NFS_OK) {
1969 /* Free the stateid unless the server explicitly
1970 * informs us the stateid is unrecognized. */
1971 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1972 nfs41_free_stateid(server, stateid, cred);
6938867e 1973 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1974
6938867e
BS		 1975 write_seqlock(&state->seqlock);
1976 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1977 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1978 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1979 }
ab7cb0df
TM		 1980
1981 if (cred != NULL)
1982 put_rpccred(cred);
3e60ffdd
CL		 1983}
1984
1985/**
1986 * nfs41_check_open_stateid - possibly free an open stateid
1987 *
1988 * @state: NFSv4 state for an inode
1989 *
1990 * Returns NFS_OK if recovery for this stateid is now finished.
1991 * Otherwise a negative NFS4ERR value is returned.
1992 */
1993static int nfs41_check_open_stateid(struct nfs4_state *state)
1994{
1995 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1996 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1997 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1998 int status;
1999
2000 /* If a state reset has been done, test_stateid is unneeded */
2001 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2002 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2003 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2004 return -NFS4ERR_BAD_STATEID;
2005
ab7cb0df 2006 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2007 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2008 if (status != NFS_OK) {
2009 /* Free the stateid unless the server explicitly
2010 * informs us the stateid is unrecognized. */
2011 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2012 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2013
2014 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2015 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2016 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2017 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2018 }
2019 return status;
2020}
2021
2022static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2023{
eb64cf96 2024 int status;
b01dd1d8 2025
3e60ffdd
CL		 2026 nfs41_clear_delegation_stateid(state);
2027 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2028 if (status != NFS_OK)
2029 status = nfs4_open_expired(sp, state);
2030 return status;
f062eb6c
BS		 2031}
2032#endif
2033
aa53ed54
JL		 2034/*
2035 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2036 * fields corresponding to attributes that were used to store the verifier.
2037 * Make sure we clobber those fields in the later setattr call
2038 */
2039static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2040{
2041 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2042 !(sattr->ia_valid & ATTR_ATIME_SET))
2043 sattr->ia_valid |= ATTR_ATIME;
2044
2045 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2046 !(sattr->ia_valid & ATTR_MTIME_SET))
2047 sattr->ia_valid |= ATTR_MTIME;
2048}
2049
c21443c2
TM		 2050static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2051 fmode_t fmode,
2052 int flags,
3efb9722 2053 struct nfs_open_context *ctx)
c21443c2
TM		 2054{
2055 struct nfs4_state_owner *sp = opendata->owner;
2056 struct nfs_server *server = sp->so_server;
275bb307 2057 struct dentry *dentry;
c21443c2
TM		 2058 struct nfs4_state *state;
2059 unsigned int seq;
2060 int ret;
2061
2062 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2063
2064 ret = _nfs4_proc_open(opendata);
2065 if (ret != 0)
2066 goto out;
2067
2068 state = nfs4_opendata_to_nfs4_state(opendata);
2069 ret = PTR_ERR(state);
2070 if (IS_ERR(state))
2071 goto out;
2072 if (server->caps & NFS_CAP_POSIX_LOCK)
2073 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2074
275bb307
TM		 2075 dentry = opendata->dentry;
2076 if (dentry->d_inode == NULL) {
2077 /* FIXME: Is this d_drop() ever needed? */
2078 d_drop(dentry);
2079 dentry = d_add_unique(dentry, igrab(state->inode));
2080 if (dentry == NULL) {
2081 dentry = opendata->dentry;
2082 } else if (dentry != ctx->dentry) {
2083 dput(ctx->dentry);
2084 ctx->dentry = dget(dentry);
2085 }
2086 nfs_set_verifier(dentry,
2087 nfs_save_change_attribute(opendata->dir->d_inode));
2088 }
2089
c21443c2
TM		 2090 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2091 if (ret != 0)
2092 goto out;
2093
3efb9722 2094 ctx->state = state;
c45ffdd2
TM		 2095 if (dentry->d_inode == state->inode) {
2096 nfs_inode_attach_open_context(ctx);
2097 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2098 nfs4_schedule_stateid_recovery(server, state);
2099 }
c21443c2
TM		 2100out:
2101 return ret;
2102}
2103
1da177e4 2104/*
24ac23ab 2105 * Returns a referenced nfs4_state
1da177e4 2106 */
82be417a 2107static int _nfs4_do_open(struct inode *dir,
4197a055 2108 struct nfs_open_context *ctx,
82be417a
AA		 2109 int flags,
2110 struct iattr *sattr,
959d921f 2111 struct nfs4_label *label)
1da177e4
LT		 2112{
2113 struct nfs4_state_owner *sp;
2114 struct nfs4_state *state = NULL;
2115 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2116 struct nfs4_opendata *opendata;
4197a055
TM		 2117 struct dentry *dentry = ctx->dentry;
2118 struct rpc_cred *cred = ctx->cred;
2119 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2120 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2121 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2122 struct nfs4_label *olabel = NULL;
aac00a8d 2123 int status;
1da177e4
LT		 2124
2125 /* Protect against reboot recovery conflicts */
1da177e4 2126 status = -ENOMEM;
d1e284d5
TM		 2127 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2128 if (sp == NULL) {
1da177e4
LT		 2129 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2130 goto out_err;
2131 }
58d9714a
TM		 2132 status = nfs4_recover_expired_lease(server);
2133 if (status != 0)
b4454fe1 2134 goto err_put_state_owner;
82a2c1b7
AV		 2135 if (dentry->d_inode != NULL)
2136 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2137 status = -ENOMEM;
49f9a0fa
TM		 2138 if (dentry->d_inode)
2139 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2140 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2141 label, claim, GFP_KERNEL);
e56e0b78 2142 if (opendata == NULL)
95d35cb4 2143 goto err_put_state_owner;
1da177e4 2144
14c43f76
DQ		 2145 if (label) {
2146 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2147 if (IS_ERR(olabel)) {
2148 status = PTR_ERR(olabel);
2149 goto err_opendata_put;
2150 }
2151 }
2152
82be417a
AA		 2153 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2154 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2155 if (!opendata->f_attr.mdsthreshold)
14c43f76 2156 goto err_free_label;
1549210f 2157 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2158 }
82a2c1b7
AV		 2159 if (dentry->d_inode != NULL)
2160 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2161
3efb9722 2162 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2163 if (status != 0)
14c43f76 2164 goto err_free_label;
3efb9722 2165 state = ctx->state;
6168f62c 2166
549b19cc
TM		 2167 if ((opendata->o_arg.open_flags & O_EXCL) &&
2168 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2169 nfs4_exclusive_attrset(opendata, sattr);
2170
2171 nfs_fattr_init(opendata->o_res.f_attr);
2172 status = nfs4_do_setattr(state->inode, cred,
2173 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2174 state, label, olabel);
2175 if (status == 0) {
0ab64e0e 2176 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2177 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2178 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2179 }
0ab64e0e 2180 }
82be417a
AA		 2181
2182 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2183 *ctx_th = opendata->f_attr.mdsthreshold;
2184 else
2185 kfree(opendata->f_attr.mdsthreshold);
2186 opendata->f_attr.mdsthreshold = NULL;
2187
14c43f76
DQ		 2188 nfs4_label_free(olabel);
2189
c6d00e63 2190 nfs4_opendata_put(opendata);
1da177e4 2191 nfs4_put_state_owner(sp);
1da177e4 2192 return 0;
14c43f76
DQ		 2193err_free_label:
2194 nfs4_label_free(olabel);
c6d00e63 2195err_opendata_put:
82be417a 2196 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2197 nfs4_opendata_put(opendata);
e56e0b78
TM		 2198err_put_state_owner:
2199 nfs4_put_state_owner(sp);
1da177e4 2200out_err:
1da177e4
LT		 2201 return status;
2202}
2203
2204
82be417a 2205static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2206 struct nfs_open_context *ctx,
82be417a
AA		 2207 int flags,
2208 struct iattr *sattr,
959d921f 2209 struct nfs4_label *label)
1da177e4 2210{
49f9a0fa 2211 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2212 struct nfs4_exception exception = { };
2213 struct nfs4_state *res;
2214 int status;
2215
2216 do {
959d921f 2217 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2218 res = ctx->state;
42113a75 2219 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2220 if (status == 0)
2221 break;
2222 /* NOTE: BAD_SEQID means the server and client disagree about the
2223 * book-keeping w.r.t. state-changing operations
2224 * (OPEN/CLOSE/LOCK/LOCKU...)
2225 * It is actually a sign of a bug on the client or on the server.
2226 *
2227 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2228 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2229 * have unhashed the old state_owner for us, and that we can
2230 * therefore safely retry using a new one. We should still warn
2231 * the user though...
2232 */
2233 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2234 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2235 " returned a bad sequence-id error!\n",
2236 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2237 exception.retry = 1;
2238 continue;
2239 }
550f5747
TM		 2240 /*
2241 * BAD_STATEID on OPEN means that the server cancelled our
2242 * state before it received the OPEN_CONFIRM.
2243 * Recover by retrying the request as per the discussion
2244 * on Page 181 of RFC3530.
2245 */
2246 if (status == -NFS4ERR_BAD_STATEID) {
2247 exception.retry = 1;
2248 continue;
2249 }
aac00a8d
TM		 2250 if (status == -EAGAIN) {
2251 /* We must have found a delegation */
2252 exception.retry = 1;
2253 continue;
2254 }
49f9a0fa
TM		 2255 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2256 continue;
2257 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2258 status, &exception));
2259 } while (exception.retry);
2260 return res;
2261}
2262
659bfcd6
TM		 2263static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2264 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2265 struct nfs4_state *state, struct nfs4_label *ilabel,
2266 struct nfs4_label *olabel)
1da177e4 2267{
3e4f6290 2268 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2269 struct nfs_setattrargs arg = {
3e4f6290 2270 .fh = NFS_FH(inode),
1da177e4
LT		 2271 .iap = sattr,
2272 .server = server,
2273 .bitmask = server->attr_bitmask,
1775fd3e 2274 .label = ilabel,
1da177e4
LT		 2275 };
2276 struct nfs_setattrres res = {
2277 .fattr = fattr,
1775fd3e 2278 .label = olabel,
1da177e4
LT		 2279 .server = server,
2280 };
2281 struct rpc_message msg = {
659bfcd6
TM		 2282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2283 .rpc_argp = &arg,
2284 .rpc_resp = &res,
2285 .rpc_cred = cred,
1da177e4 2286 };
26e976a8 2287 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2288 fmode_t fmode;
2289 bool truncate;
65e4308d 2290 int status;
1da177e4 2291
aa9c2669
DQ		 2292 arg.bitmask = nfs4_bitmask(server, ilabel);
2293 if (ilabel)
2294 arg.bitmask = nfs4_bitmask(server, olabel);
2295
0e574af1 2296 nfs_fattr_init(fattr);
1da177e4 2297
ee3ae84e
TM		 2298 /* Servers should only apply open mode checks for file size changes */
2299 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2300 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2301
2302 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2303 /* Use that stateid */
2304 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2305 struct nfs_lockowner lockowner = {
2306 .l_owner = current->files,
2307 .l_pid = current->tgid,
2308 };
4fc8796d 2309 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2310 &lockowner);
08e9eac4 2311 } else
f597c537 2312 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2313
7c513058 2314 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2315 if (status == 0 && state != NULL)
2316 renew_lease(server, timestamp);
65e4308d 2317 return status;
1da177e4
LT		 2318}
2319
659bfcd6
TM		 2320static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2321 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2322 struct nfs4_state *state, struct nfs4_label *ilabel,
2323 struct nfs4_label *olabel)
1da177e4 2324{
3e4f6290 2325 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2326 struct nfs4_exception exception = {
2327 .state = state,
3114ea7a 2328 .inode = inode,
a1d0b5ee 2329 };
1da177e4
LT		 2330 int err;
2331 do {
1775fd3e 2332 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2333 trace_nfs4_setattr(inode, err);
451146be
TM		 2334 switch (err) {
2335 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2336 if (!(sattr->ia_valid & ATTR_SIZE)) {
2337 pr_warn_once("NFSv4: server %s is incorrectly "
2338 "applying open mode checks to "
2339 "a SETATTR that is not "
2340 "changing file size.\n",
2341 server->nfs_client->cl_hostname);
2342 }
451146be
TM		 2343 if (state && !(state->state & FMODE_WRITE)) {
2344 err = -EBADF;
2345 if (sattr->ia_valid & ATTR_OPEN)
2346 err = -EACCES;
2347 goto out;
2348 }
2349 }
2350 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2351 } while (exception.retry);
451146be 2352out:
1da177e4
LT		 2353 return err;
2354}
2355
2356struct nfs4_closedata {
2357 struct inode *inode;
2358 struct nfs4_state *state;
2359 struct nfs_closeargs arg;
2360 struct nfs_closeres res;
516a6af6 2361 struct nfs_fattr fattr;
26e976a8 2362 unsigned long timestamp;
f7e8917a
FI		 2363 bool roc;
2364 u32 roc_barrier;
1da177e4
LT		 2365};
2366
963d8fe5 2367static void nfs4_free_closedata(void *data)
9512135d 2368{
963d8fe5
TM		 2369 struct nfs4_closedata *calldata = data;
2370 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2371 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2372
f7e8917a
FI		 2373 if (calldata->roc)
2374 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2375 nfs4_put_open_state(calldata->state);
2376 nfs_free_seqid(calldata->arg.seqid);
9512135d 2377 nfs4_put_state_owner(sp);
322b2b90 2378 nfs_sb_deactive(sb);
9512135d
TM		 2379 kfree(calldata);
2380}
2381
88069f77
TM		 2382static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2383 fmode_t fmode)
2384{
2385 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2386 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2387 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2388 case FMODE_WRITE:
88069f77 2389 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2390 break;
2391 case FMODE_READ:
88069f77 2392 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2393 break;
2394 case 0:
2395 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2396 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2397 clear_bit(NFS_OPEN_STATE, &state->flags);
2398 }
88069f77
TM		 2399 spin_unlock(&state->owner->so_lock);
2400}
2401
963d8fe5 2402static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2403{
963d8fe5 2404 struct nfs4_closedata *calldata = data;
1da177e4 2405 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2406 struct nfs_server *server = NFS_SERVER(calldata->inode);
2407
a3ca5651 2408 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2409 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2410 return;
42113a75 2411 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2412 /* hmm. we are done with the inode, and in the process of freeing
2413 * the state_owner. we keep this around to process errors
2414 */
1da177e4
LT		 2415 switch (task->tk_status) {
2416 case 0:
f7e8917a
FI		 2417 if (calldata->roc)
2418 pnfs_roc_set_barrier(state->inode,
2419 calldata->roc_barrier);
45328c35 2420 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2421 renew_lease(server, calldata->timestamp);
88069f77
TM		 2422 nfs4_close_clear_stateid_flags(state,
2423 calldata->arg.fmode);
1da177e4
LT		 2424 break;
2425 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2426 case -NFS4ERR_OLD_STATEID:
2427 case -NFS4ERR_BAD_STATEID:
1da177e4 2428 case -NFS4ERR_EXPIRED:
dc0b027d 2429 if (calldata->arg.fmode == 0)
9e33bed5 2430 break;
1da177e4 2431 default:
72211dbe
TM		 2432 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2433 rpc_restart_call_prepare(task);
1da177e4 2434 }
72211dbe 2435 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2436 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2437 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2438}
2439
4ce70ada 2440static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2441{
4ce70ada 2442 struct nfs4_closedata *calldata = data;
9512135d 2443 struct nfs4_state *state = calldata->state;
7fdab069 2444 struct inode *inode = calldata->inode;
88069f77 2445 int call_close = 0;
9512135d 2446
a3ca5651 2447 dprintk("%s: begin!\n", __func__);
963d8fe5 2448 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2449 goto out_wait;
003707c7 2450
88069f77
TM		 2451 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2452 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2453 spin_lock(&state->owner->so_lock);
003707c7 2454 /* Calculate the change in open mode */
e7616923 2455 if (state->n_rdwr == 0) {
003707c7 2456 if (state->n_rdonly == 0) {
88069f77
TM		 2457 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2458 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2459 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2460 }
2461 if (state->n_wronly == 0) {
88069f77
TM		 2462 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2463 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2464 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2465 }
e7616923 2466 }
5d422301
TM		 2467 if (!nfs4_valid_open_stateid(state))
2468 call_close = 0;
4cecb76f 2469 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2470
2471 if (!call_close) {
963d8fe5 2472 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2473 goto out_no_action;
9512135d 2474 }
88069f77 2475
f7e8917a 2476 if (calldata->arg.fmode == 0) {
88069f77 2477 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2478 if (calldata->roc &&
b9536ad5
AA		 2479 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2480 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2481 goto out_wait;
b9536ad5 2482 }
f7e8917a 2483 }
88069f77 2484
516a6af6 2485 nfs_fattr_init(calldata->res.fattr);
26e976a8 2486 calldata->timestamp = jiffies;
7fdab069 2487 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2488 &calldata->arg.seq_args,
2489 &calldata->res.seq_res,
2240a9e2
TM		 2490 task) != 0)
2491 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2492 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2493 return;
2494out_no_action:
2495 task->tk_action = NULL;
2496out_wait:
2497 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2498}
2499
963d8fe5 2500static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2501 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2502 .rpc_call_done = nfs4_close_done,
2503 .rpc_release = nfs4_free_closedata,
2504};
2505
1da177e4
LT		 2506/*
2507 * It is possible for data to be read/written from a mem-mapped file
2508 * after the sys_close call (which hits the vfs layer as a flush).
2509 * This means that we can't safely call nfsv4 close on a file until
2510 * the inode is cleared. This in turn means that we are not good
2511 * NFSv4 citizens - we do not indicate to the server to update the file's
2512 * share state even when we are done with one of the three share
2513 * stateid's in the inode.
2514 *
2515 * NOTE: Caller must be holding the sp->so_owner semaphore!
2516 */
1f7977c1 2517int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2518{
4a35bd41 2519 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2520 struct nfs4_closedata *calldata;
b39e625b
TM		 2521 struct nfs4_state_owner *sp = state->owner;
2522 struct rpc_task *task;
5138fde0
TM		 2523 struct rpc_message msg = {
2524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2525 .rpc_cred = state->owner->so_cred,
2526 };
c970aa85
TM		 2527 struct rpc_task_setup task_setup_data = {
2528 .rpc_client = server->client,
5138fde0 2529 .rpc_message = &msg,
c970aa85 2530 .callback_ops = &nfs4_close_ops,
101070ca 2531 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2532 .flags = RPC_TASK_ASYNC,
2533 };
9512135d 2534 int status = -ENOMEM;
1da177e4 2535
8535b2be 2536 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2537 if (calldata == NULL)
9512135d 2538 goto out;
a9c92d6b 2539 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2540 calldata->inode = state->inode;
1da177e4 2541 calldata->state = state;
4a35bd41 2542 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2543 calldata->arg.stateid = &state->open_stateid;
1da177e4 2544 /* Serialization for the sequence id */
8535b2be 2545 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2546 if (calldata->arg.seqid == NULL)
2547 goto out_free_calldata;
dc0b027d 2548 calldata->arg.fmode = 0;
a65318bf 2549 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2550 calldata->res.fattr = &calldata->fattr;
c1d51931 2551 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2552 calldata->res.server = server;
1f7977c1 2553 calldata->roc = pnfs_roc(state->inode);
643168c2 2554 nfs_sb_active(calldata->inode->i_sb);
9512135d 2555
1174dd1f
TM		 2556 msg.rpc_argp = &calldata->arg;
2557 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2558 task_setup_data.callback_data = calldata;
2559 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2560 if (IS_ERR(task))
2561 return PTR_ERR(task);
a49c3c77
TM		 2562 status = 0;
2563 if (wait)
2564 status = rpc_wait_for_completion_task(task);
b39e625b 2565 rpc_put_task(task);
a49c3c77 2566 return status;
9512135d
TM		 2567out_free_calldata:
2568 kfree(calldata);
2569out:
b39e625b
TM		 2570 nfs4_put_open_state(state);
2571 nfs4_put_state_owner(sp);
9512135d 2572 return status;
1da177e4
LT		 2573}
2574
2b484297 2575static struct inode *
cd9a1c0e 2576nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2577{
1da177e4 2578 struct nfs4_state *state;
aa9c2669
DQ		 2579 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2580
2581 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2582
565277f6 2583 /* Protect against concurrent sillydeletes */
959d921f 2584 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2585
2586 nfs4_label_release_security(label);
2587
f46e0bd3
TM		 2588 if (IS_ERR(state))
2589 return ERR_CAST(state);
275bb307 2590 return state->inode;
1da177e4
LT		 2591}
2592
1185a552 2593static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2594{
2595 if (ctx->state == NULL)
2596 return;
2597 if (is_sync)
643168c2 2598 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2599 else
643168c2 2600 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2601}
1da177e4
LT		 2602
2603static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2604{
43652ad5
BH		 2605 struct nfs4_server_caps_arg args = {
2606 .fhandle = fhandle,
2607 };
1da177e4
LT		 2608 struct nfs4_server_caps_res res = {};
2609 struct rpc_message msg = {
2610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2611 .rpc_argp = &args,
1da177e4
LT		 2612 .rpc_resp = &res,
2613 };
2614 int status;
2615
7c513058 2616 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2617 if (status == 0) {
2618 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2619 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2620 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2621 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2622 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2623 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2624 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2625 server->caps |= NFS_CAP_ACLS;
2626 if (res.has_links != 0)
2627 server->caps |= NFS_CAP_HARDLINKS;
2628 if (res.has_symlinks != 0)
2629 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2630 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2631 server->caps |= NFS_CAP_FILEID;
2632 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2633 server->caps |= NFS_CAP_MODE;
2634 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2635 server->caps |= NFS_CAP_NLINK;
2636 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2637 server->caps |= NFS_CAP_OWNER;
2638 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2639 server->caps |= NFS_CAP_OWNER_GROUP;
2640 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2641 server->caps |= NFS_CAP_ATIME;
2642 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2643 server->caps |= NFS_CAP_CTIME;
2644 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2645 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2646#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2647 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2648 server->caps |= NFS_CAP_SECURITY_LABEL;
2649#endif
2650 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2651 sizeof(server->attr_bitmask));
62ab460c 2652
aa9c2669
DQ		 2653 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2654 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2655 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2656 }
a65318bf
TM		 2657 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2658 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2659 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2660 server->acl_bitmask = res.acl_bitmask;
264e6351 2661 server->fh_expire_type = res.fh_expire_type;
1da177e4 2662 }
cccef3b9 2663
1da177e4
LT		 2664 return status;
2665}
2666
55a97593 2667int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2668{
2669 struct nfs4_exception exception = { };
2670 int err;
2671 do {
2672 err = nfs4_handle_exception(server,
2673 _nfs4_server_capabilities(server, fhandle),
2674 &exception);
2675 } while (exception.retry);
2676 return err;
2677}
2678
2679static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2680 struct nfs_fsinfo *info)
2681{
aa9c2669 2682 u32 bitmask[3];
1da177e4 2683 struct nfs4_lookup_root_arg args = {
aa9c2669 2684 .bitmask = bitmask,
1da177e4
LT		 2685 };
2686 struct nfs4_lookup_res res = {
2687 .server = server,
0e574af1 2688 .fattr = info->fattr,
1da177e4
LT		 2689 .fh = fhandle,
2690 };
2691 struct rpc_message msg = {
2692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2693 .rpc_argp = &args,
2694 .rpc_resp = &res,
2695 };
008f55d0 2696
aa9c2669
DQ		 2697 bitmask[0] = nfs4_fattr_bitmap[0];
2698 bitmask[1] = nfs4_fattr_bitmap[1];
2699 /*
2700 * Process the label in the upcoming getfattr
2701 */
2702 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2703
0e574af1 2704 nfs_fattr_init(info->fattr);
7c513058 2705 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2706}
2707
2708static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2709 struct nfs_fsinfo *info)
2710{
2711 struct nfs4_exception exception = { };
2712 int err;
2713 do {
fb8a5ba8 2714 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2715 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2716 switch (err) {
2717 case 0:
2718 case -NFS4ERR_WRONGSEC:
05e9cfb4 2719 goto out;
fb8a5ba8
BS		 2720 default:
2721 err = nfs4_handle_exception(server, err, &exception);
2722 }
1da177e4 2723 } while (exception.retry);
05e9cfb4 2724out:
1da177e4
LT		 2725 return err;
2726}
2727
8f70e95f
BS		 2728static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2729 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2730{
c2190661
TM		 2731 struct rpc_auth_create_args auth_args = {
2732 .pseudoflavor = flavor,
2733 };
8f70e95f
BS		 2734 struct rpc_auth *auth;
2735 int ret;
2736
c2190661 2737 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2738 if (IS_ERR(auth)) {
75bc8821 2739 ret = -EACCES;
8f70e95f
BS		 2740 goto out;
2741 }
2742 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2743out:
2744 return ret;
2745}
2746
9a744ba3
CL		 2747/*
2748 * Retry pseudoroot lookup with various security flavors. We do this when:
2749 *
2750 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2751 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2752 *
2753 * Returns zero on success, or a negative NFS4ERR value, or a
2754 * negative errno value.
2755 */
801a16dc 2756static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2757 struct nfs_fsinfo *info)
1da177e4 2758{
9a744ba3
CL		 2759 /* Per 3530bis 15.33.5 */
2760 static const rpc_authflavor_t flav_array[] = {
2761 RPC_AUTH_GSS_KRB5P,
2762 RPC_AUTH_GSS_KRB5I,
2763 RPC_AUTH_GSS_KRB5,
c4eafe11 2764 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2765 RPC_AUTH_NULL,
2766 };
2767 int status = -EPERM;
2768 size_t i;
6a1a1e34 2769
9a744ba3 2770 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2771 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2772 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2773 continue;
2774 break;
8f70e95f 2775 }
9a744ba3 2776
fb8a5ba8
BS		 2777 /*
2778 * -EACCESS could mean that the user doesn't have correct permissions
2779 * to access the mount. It could also mean that we tried to mount
2780 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2781 * existing mount programs don't handle -EACCES very well so it should
2782 * be mapped to -EPERM instead.
2783 */
2784 if (status == -EACCES)
2785 status = -EPERM;
801a16dc
BS		 2786 return status;
2787}
2788
2ed4b95b
CL		 2789static int nfs4_do_find_root_sec(struct nfs_server *server,
2790 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2791{
2792 int mv = server->nfs_client->cl_minorversion;
2793 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2794}
2795
2796/**
2797 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2798 * @server: initialized nfs_server handle
2799 * @fhandle: we fill in the pseudo-fs root file handle
2800 * @info: we fill in an FSINFO struct
2801 *
2802 * Returns zero on success, or a negative errno.
801a16dc 2803 */
3028eb2b
BS		 2804int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2805 struct nfs_fsinfo *info)
801a16dc 2806{
2ed4b95b
CL		 2807 int status;
2808
2809 status = nfs4_lookup_root(server, fhandle, info);
2810 if ((status == -NFS4ERR_WRONGSEC) &&
2811 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2812 status = nfs4_do_find_root_sec(server, fhandle, info);
2813
1da177e4
LT		 2814 if (status == 0)
2815 status = nfs4_server_capabilities(server, fhandle);
2816 if (status == 0)
2817 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2818
c12e87f4 2819 return nfs4_map_errors(status);
1da177e4
LT		 2820}
2821
bae36241
BS		 2822static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2823 struct nfs_fsinfo *info)
2824{
2825 int error;
2826 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2827 struct nfs4_label *label = NULL;
bae36241
BS		 2828
2829 error = nfs4_server_capabilities(server, mntfh);
2830 if (error < 0) {
2831 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2832 return error;
2833 }
2834
14c43f76
DQ		 2835 label = nfs4_label_alloc(server, GFP_KERNEL);
2836 if (IS_ERR(label))
2837 return PTR_ERR(label);
2838
1775fd3e 2839 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2840 if (error < 0) {
2841 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2842 goto err_free_label;
bae36241
BS		 2843 }
2844
2845 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2846 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2847 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2848
14c43f76
DQ		 2849err_free_label:
2850 nfs4_label_free(label);
2851
bae36241
BS		 2852 return error;
2853}
2854
6b97fd3d
MN		 2855/*
2856 * Get locations and (maybe) other attributes of a referral.
2857 * Note that we'll actually follow the referral later when
2858 * we detect fsid mismatch in inode revalidation
2859 */
f05d147f
BS		 2860static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2861 const struct qstr *name, struct nfs_fattr *fattr,
2862 struct nfs_fh *fhandle)
6b97fd3d
MN		 2863{
2864 int status = -ENOMEM;
2865 struct page *page = NULL;
2866 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2867
2868 page = alloc_page(GFP_KERNEL);
2869 if (page == NULL)
2870 goto out;
2871 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2872 if (locations == NULL)
2873 goto out;
2874
f05d147f 2875 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2876 if (status != 0)
2877 goto out;
2878 /* Make sure server returned a different fsid for the referral */
2879 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2880 dprintk("%s: server did not return a different fsid for"
2881 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2882 status = -EIO;
2883 goto out;
2884 }
533eb461
AA		 2885 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2886 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2887
533eb461 2888 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2889 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2890 memset(fhandle, 0, sizeof(struct nfs_fh));
2891out:
2892 if (page)
2893 __free_page(page);
5d7ca35a 2894 kfree(locations);
6b97fd3d
MN		 2895 return status;
2896}
2897
1775fd3e
DQ		 2898static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2899 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2900{
2901 struct nfs4_getattr_arg args = {
2902 .fh = fhandle,
2903 .bitmask = server->attr_bitmask,
2904 };
2905 struct nfs4_getattr_res res = {
2906 .fattr = fattr,
1775fd3e 2907 .label = label,
1da177e4
LT		 2908 .server = server,
2909 };
2910 struct rpc_message msg = {
2911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2912 .rpc_argp = &args,
2913 .rpc_resp = &res,
2914 };
aa9c2669
DQ		 2915
2916 args.bitmask = nfs4_bitmask(server, label);
2917
0e574af1 2918 nfs_fattr_init(fattr);
7c513058 2919 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2920}
2921
1775fd3e
DQ		 2922static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2924{
2925 struct nfs4_exception exception = { };
2926 int err;
2927 do {
b5f875a9
TM		 2928 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2929 trace_nfs4_getattr(server, fhandle, fattr, err);
2930 err = nfs4_handle_exception(server, err,
1da177e4
LT		 2931 &exception);
2932 } while (exception.retry);
2933 return err;
2934}
2935
2936/*
2937 * The file is not closed if it is opened due to the a request to change
2938 * the size of the file. The open call will not be needed once the
2939 * VFS layer lookup-intents are implemented.
2940 *
2941 * Close is called when the inode is destroyed.
2942 * If we haven't opened the file for O_WRONLY, we
2943 * need to in the size_change case to obtain a stateid.
2944 *
2945 * Got race?
2946 * Because OPEN is always done by name in nfsv4, it is
2947 * possible that we opened a different file by the same
2948 * name. We can recognize this race condition, but we
2949 * can't do anything about it besides returning an error.
2950 *
2951 * This will be fixed with VFS changes (lookup-intent).
2952 */
2953static int
2954nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2955 struct iattr *sattr)
2956{
08e9eac4 2957 struct inode *inode = dentry->d_inode;
659bfcd6 2958 struct rpc_cred *cred = NULL;
d530838b 2959 struct nfs4_state *state = NULL;
14c43f76 2960 struct nfs4_label *label = NULL;
1da177e4
LT		 2961 int status;
2962
8a1636c4 2963 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2964 pnfs_commit_and_return_layout(inode);
8a1636c4 2965
0e574af1 2966 nfs_fattr_init(fattr);
1da177e4 2967
2669940d
AA		 2968 /* Deal with open(O_TRUNC) */
2969 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2970 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2971
2972 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2973 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2974 return 0;
2975
d530838b 2976 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2977 if (sattr->ia_valid & ATTR_FILE) {
2978 struct nfs_open_context *ctx;
2979
2980 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2981 if (ctx) {
2982 cred = ctx->cred;
2983 state = ctx->state;
2984 }
659bfcd6 2985 }
08e9eac4 2986
14c43f76
DQ		 2987 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2988 if (IS_ERR(label))
2989 return PTR_ERR(label);
2990
2991 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2992 if (status == 0) {
65e4308d 2993 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2994 nfs_setsecurity(inode, fattr, label);
2995 }
14c43f76 2996 nfs4_label_free(label);
1da177e4
LT		 2997 return status;
2998}
2999
0c2e53f1
TM		 3000static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3001 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3002 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3003{
0c2e53f1 3004 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3005 int status;
3006 struct nfs4_lookup_arg args = {
3007 .bitmask = server->attr_bitmask,
0c2e53f1 3008 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3009 .name = name,
3010 };
3011 struct nfs4_lookup_res res = {
3012 .server = server,
3013 .fattr = fattr,
aa9c2669 3014 .label = label,
2b3de441
DH		 3015 .fh = fhandle,
3016 };
3017 struct rpc_message msg = {
3018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3019 .rpc_argp = &args,
3020 .rpc_resp = &res,
3021 };
3022
aa9c2669
DQ		 3023 args.bitmask = nfs4_bitmask(server, label);
3024
2b3de441
DH		 3025 nfs_fattr_init(fattr);
3026
1da177e4 3027 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3028 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3029 dprintk("NFS reply lookup: %d\n", status);
3030 return status;
3031}
3032
72de53ec 3033static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3034{
7ebb9315 3035 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3036 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3037 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3038 fattr->nlink = 2;
3039}
3040
72de53ec
BS		 3041static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3042 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3043 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3044{
3045 struct nfs4_exception exception = { };
72de53ec 3046 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3047 int err;
3048 do {
1775fd3e 3049 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3050 trace_nfs4_lookup(dir, name, err);
72de53ec 3051 switch (err) {
08ef7bd3 3052 case -NFS4ERR_BADNAME:
72de53ec
BS		 3053 err = -ENOENT;
3054 goto out;
0c2e53f1 3055 case -NFS4ERR_MOVED:
f05d147f 3056 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3057 goto out;
0c2e53f1 3058 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3059 err = -EPERM;
3060 if (client != *clnt)
3061 goto out;
3062
3063 client = nfs4_create_sec_client(client, dir, name);
3064 if (IS_ERR(client))
3065 return PTR_ERR(client);
3066
3067 exception.retry = 1;
3068 break;
3069 default:
3070 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3071 }
1da177e4 3072 } while (exception.retry);
72de53ec
BS		 3073
3074out:
3075 if (err == 0)
3076 *clnt = client;
3077 else if (client != *clnt)
3078 rpc_shutdown_client(client);
3079
1da177e4
LT		 3080 return err;
3081}
3082
80a16b21 3083static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3084 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3085 struct nfs4_label *label)
72de53ec
BS		 3086{
3087 int status;
3088 struct rpc_clnt *client = NFS_CLIENT(dir);
3089
1775fd3e 3090 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3091 if (client != NFS_CLIENT(dir)) {
3092 rpc_shutdown_client(client);
3093 nfs_fixup_secinfo_attributes(fattr);
3094 }
3095 return status;
3096}
3097
f05d147f
BS		 3098struct rpc_clnt *
3099nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3100 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3101{
3102 int status;
3103 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3104
1775fd3e 3105 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3106 if (status < 0) {
3107 rpc_shutdown_client(client);
3108 return ERR_PTR(status);
3109 }
3110 return client;
3111}
3112
1da177e4
LT		 3113static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3114{
76b32999 3115 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3116 struct nfs4_accessargs args = {
3117 .fh = NFS_FH(inode),
a4980e78 3118 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3119 };
3120 struct nfs4_accessres res = {
3121 .server = server,
1da177e4 3122 };
1da177e4
LT		 3123 struct rpc_message msg = {
3124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3125 .rpc_argp = &args,
3126 .rpc_resp = &res,
3127 .rpc_cred = entry->cred,
3128 };
3129 int mode = entry->mask;
aa9c2669 3130 int status = 0;
1da177e4
LT		 3131
3132 /*
3133 * Determine which access bits we want to ask for...
3134 */
3135 if (mode & MAY_READ)
3136 args.access |= NFS4_ACCESS_READ;
3137 if (S_ISDIR(inode->i_mode)) {
3138 if (mode & MAY_WRITE)
3139 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3140 if (mode & MAY_EXEC)
3141 args.access |= NFS4_ACCESS_LOOKUP;
3142 } else {
3143 if (mode & MAY_WRITE)
3144 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3145 if (mode & MAY_EXEC)
3146 args.access |= NFS4_ACCESS_EXECUTE;
3147 }
c407d41a
TM		 3148
3149 res.fattr = nfs_alloc_fattr();
3150 if (res.fattr == NULL)
3151 return -ENOMEM;
3152
7c513058 3153 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3154 if (!status) {
6168f62c 3155 nfs_access_set_mask(entry, res.access);
c407d41a 3156 nfs_refresh_inode(inode, res.fattr);
1da177e4 3157 }
c407d41a 3158 nfs_free_fattr(res.fattr);
1da177e4
LT		 3159 return status;
3160}
3161
3162static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3163{
3164 struct nfs4_exception exception = { };
3165 int err;
3166 do {
c1578b76
TM		 3167 err = _nfs4_proc_access(inode, entry);
3168 trace_nfs4_access(inode, err);
3169 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3170 &exception);
3171 } while (exception.retry);
3172 return err;
3173}
3174
3175/*
3176 * TODO: For the time being, we don't try to get any attributes
3177 * along with any of the zero-copy operations READ, READDIR,
3178 * READLINK, WRITE.
3179 *
3180 * In the case of the first three, we want to put the GETATTR
3181 * after the read-type operation -- this is because it is hard
3182 * to predict the length of a GETATTR response in v4, and thus
3183 * align the READ data correctly. This means that the GETATTR
3184 * may end up partially falling into the page cache, and we should
3185 * shift it into the 'tail' of the xdr_buf before processing.
3186 * To do this efficiently, we need to know the total length
3187 * of data received, which doesn't seem to be available outside
3188 * of the RPC layer.
3189 *
3190 * In the case of WRITE, we also want to put the GETATTR after
3191 * the operation -- in this case because we want to make sure
140150db 3192 * we get the post-operation mtime and size.
1da177e4
LT		 3193 *
3194 * Both of these changes to the XDR layer would in fact be quite
3195 * minor, but I decided to leave them for a subsequent patch.
3196 */
3197static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3198 unsigned int pgbase, unsigned int pglen)
3199{
3200 struct nfs4_readlink args = {
3201 .fh = NFS_FH(inode),
3202 .pgbase = pgbase,
3203 .pglen = pglen,
3204 .pages = &page,
3205 };
f50c7000 3206 struct nfs4_readlink_res res;
1da177e4
LT		 3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3209 .rpc_argp = &args,
f50c7000 3210 .rpc_resp = &res,
1da177e4
LT		 3211 };
3212
7c513058 3213 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3214}
3215
3216static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3217 unsigned int pgbase, unsigned int pglen)
3218{
3219 struct nfs4_exception exception = { };
3220 int err;
3221 do {
c1578b76
TM		 3222 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3223 trace_nfs4_readlink(inode, err);
3224 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3225 &exception);
3226 } while (exception.retry);
3227 return err;
3228}
3229
1da177e4 3230/*
8867fe58 3231 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3232 */
1da177e4
LT		 3233static int
3234nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3235 int flags)
1da177e4 3236{
aa9c2669 3237 struct nfs4_label l, *ilabel = NULL;
8867fe58 3238 struct nfs_open_context *ctx;
1da177e4 3239 struct nfs4_state *state;
1da177e4
LT		 3240 int status = 0;
3241
8867fe58
MS		 3242 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3243 if (IS_ERR(ctx))
3244 return PTR_ERR(ctx);
3245
aa9c2669
DQ		 3246 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3247
a8a5da99 3248 sattr->ia_mode &= ~current_umask();
959d921f 3249 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3250 if (IS_ERR(state)) {
3251 status = PTR_ERR(state);
c0204fd2 3252 goto out;
1da177e4 3253 }
1da177e4 3254out:
aa9c2669 3255 nfs4_label_release_security(ilabel);
8867fe58 3256 put_nfs_open_context(ctx);
1da177e4
LT		 3257 return status;
3258}
3259
3260static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3261{
16e42959 3262 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3263 struct nfs_removeargs args = {
1da177e4 3264 .fh = NFS_FH(dir),
26fe5750 3265 .name = *name,
16e42959 3266 };
4fdc17b2 3267 struct nfs_removeres res = {
16e42959 3268 .server = server,
1da177e4 3269 };
1da177e4 3270 struct rpc_message msg = {
4fdc17b2
TM		 3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3272 .rpc_argp = &args,
3273 .rpc_resp = &res,
1da177e4 3274 };
778d2817 3275 int status;
1da177e4 3276
7c513058 3277 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3278 if (status == 0)
16e42959 3279 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3280 return status;
3281}
3282
3283static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3284{
3285 struct nfs4_exception exception = { };
3286 int err;
3287 do {
078ea3df
TM		 3288 err = _nfs4_proc_remove(dir, name);
3289 trace_nfs4_remove(dir, name, err);
3290 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3291 &exception);
3292 } while (exception.retry);
3293 return err;
3294}
3295
e4eff1a6 3296static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3297{
e4eff1a6
TM		 3298 struct nfs_server *server = NFS_SERVER(dir);
3299 struct nfs_removeargs *args = msg->rpc_argp;
3300 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3301
e4eff1a6 3302 res->server = server;
1da177e4 3303 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3304 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3305
3306 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3307}
3308
34e137cc
BS		 3309static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3310{
d9afbd1b
TM		 3311 nfs4_setup_sequence(NFS_SERVER(data->dir),
3312 &data->args.seq_args,
3313 &data->res.seq_res,
3314 task);
1da177e4
LT		 3315}
3316
e4eff1a6 3317static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3318{
078ea3df
TM		 3319 struct nfs_unlinkdata *data = task->tk_calldata;
3320 struct nfs_removeres *res = &data->res;
e4eff1a6 3321
14516c3a
TM		 3322 if (!nfs4_sequence_done(task, &res->seq_res))
3323 return 0;
9e33bed5 3324 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3325 return 0;
3326 update_changeattr(dir, &res->cinfo);
e4eff1a6 3327 return 1;
1da177e4
LT		 3328}
3329
d3d4152a
JL		 3330static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3331{
3332 struct nfs_server *server = NFS_SERVER(dir);
3333 struct nfs_renameargs *arg = msg->rpc_argp;
3334 struct nfs_renameres *res = msg->rpc_resp;
3335
3336 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3337 res->server = server;
a9c92d6b 3338 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3339}
3340
c6bfa1a1
BS		 3341static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3342{
d9afbd1b
TM		 3343 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3344 &data->args.seq_args,
3345 &data->res.seq_res,
3346 task);
d3d4152a
JL		 3347}
3348
3349static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3350 struct inode *new_dir)
3351{
fbc6f7c2
TM		 3352 struct nfs_renamedata *data = task->tk_calldata;
3353 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3354
3355 if (!nfs4_sequence_done(task, &res->seq_res))
3356 return 0;
3357 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3358 return 0;
3359
3360 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3361 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3362 return 1;
3363}
3364
1da177e4
LT		 3365static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3366 struct inode *new_dir, struct qstr *new_name)
3367{
6caf2c82 3368 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3369 struct nfs_renameargs arg = {
1da177e4
LT		 3370 .old_dir = NFS_FH(old_dir),
3371 .new_dir = NFS_FH(new_dir),
3372 .old_name = old_name,
3373 .new_name = new_name,
6caf2c82 3374 };
e8582a8b 3375 struct nfs_renameres res = {
6caf2c82 3376 .server = server,
1da177e4 3377 };
1da177e4
LT		 3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3380 .rpc_argp = &arg,
3381 .rpc_resp = &res,
3382 };
011fff72 3383 int status = -ENOMEM;
14c43f76 3384
7c513058 3385 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3386 if (!status) {
3387 update_changeattr(old_dir, &res.old_cinfo);
3388 update_changeattr(new_dir, &res.new_cinfo);
3389 }
3390 return status;
3391}
3392
3393static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3394 struct inode *new_dir, struct qstr *new_name)
3395{
3396 struct nfs4_exception exception = { };
3397 int err;
3398 do {
fbc6f7c2
TM		 3399 err = _nfs4_proc_rename(old_dir, old_name,
3400 new_dir, new_name);
3401 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3402 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3403 &exception);
3404 } while (exception.retry);
3405 return err;
3406}
3407
3408static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3409{
91ba2eee 3410 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3411 struct nfs4_link_arg arg = {
3412 .fh = NFS_FH(inode),
3413 .dir_fh = NFS_FH(dir),
3414 .name = name,
91ba2eee
TM		 3415 .bitmask = server->attr_bitmask,
3416 };
91ba2eee
TM		 3417 struct nfs4_link_res res = {
3418 .server = server,
1775fd3e 3419 .label = NULL,
1da177e4 3420 };
1da177e4
LT		 3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3423 .rpc_argp = &arg,
91ba2eee 3424 .rpc_resp = &res,
1da177e4 3425 };
136f2627
TM		 3426 int status = -ENOMEM;
3427
3428 res.fattr = nfs_alloc_fattr();
778d2817 3429 if (res.fattr == NULL)
136f2627 3430 goto out;
1da177e4 3431
14c43f76
DQ		 3432 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3433 if (IS_ERR(res.label)) {
3434 status = PTR_ERR(res.label);
3435 goto out;
3436 }
aa9c2669 3437 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3438
7c513058 3439 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3440 if (!status) {
3441 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3442 status = nfs_post_op_update_inode(inode, res.fattr);
3443 if (!status)
3444 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3445 }
14c43f76
DQ		 3446
3447
3448 nfs4_label_free(res.label);
3449
136f2627 3450out:
136f2627 3451 nfs_free_fattr(res.fattr);
1da177e4
LT		 3452 return status;
3453}
3454
3455static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3456{
3457 struct nfs4_exception exception = { };
3458 int err;
3459 do {
3460 err = nfs4_handle_exception(NFS_SERVER(inode),
3461 _nfs4_proc_link(inode, dir, name),
3462 &exception);
3463 } while (exception.retry);
3464 return err;
3465}
3466
57dc9a57
TM		 3467struct nfs4_createdata {
3468 struct rpc_message msg;
3469 struct nfs4_create_arg arg;
3470 struct nfs4_create_res res;
3471 struct nfs_fh fh;
3472 struct nfs_fattr fattr;
1775fd3e 3473 struct nfs4_label *label;
57dc9a57
TM		 3474};
3475
3476static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3477 struct qstr *name, struct iattr *sattr, u32 ftype)
3478{
3479 struct nfs4_createdata *data;
3480
3481 data = kzalloc(sizeof(*data), GFP_KERNEL);
3482 if (data != NULL) {
3483 struct nfs_server *server = NFS_SERVER(dir);
3484
14c43f76
DQ		 3485 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3486 if (IS_ERR(data->label))
3487 goto out_free;
3488
57dc9a57
TM		 3489 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3490 data->msg.rpc_argp = &data->arg;
3491 data->msg.rpc_resp = &data->res;
3492 data->arg.dir_fh = NFS_FH(dir);
3493 data->arg.server = server;
3494 data->arg.name = name;
3495 data->arg.attrs = sattr;
3496 data->arg.ftype = ftype;
aa9c2669 3497 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3498 data->res.server = server;
3499 data->res.fh = &data->fh;
3500 data->res.fattr = &data->fattr;
1775fd3e 3501 data->res.label = data->label;
57dc9a57 3502 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3503 }
3504 return data;
14c43f76
DQ		 3505out_free:
3506 kfree(data);
3507 return NULL;
57dc9a57
TM		 3508}
3509
3510static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3511{
7c513058 3512 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3513 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3514 if (status == 0) {
3515 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3516 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3517 }
3518 return status;
3519}
3520
3521static void nfs4_free_createdata(struct nfs4_createdata *data)
3522{
14c43f76 3523 nfs4_label_free(data->label);
57dc9a57
TM		 3524 kfree(data);
3525}
3526
4f390c15 3527static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3528 struct page *page, unsigned int len, struct iattr *sattr,
3529 struct nfs4_label *label)
1da177e4 3530{
57dc9a57
TM		 3531 struct nfs4_createdata *data;
3532 int status = -ENAMETOOLONG;
1da177e4 3533
94a6d753 3534 if (len > NFS4_MAXPATHLEN)
57dc9a57 3535 goto out;
4f390c15 3536
57dc9a57
TM		 3537 status = -ENOMEM;
3538 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3539 if (data == NULL)
3540 goto out;
3541
3542 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3543 data->arg.u.symlink.pages = &page;
3544 data->arg.u.symlink.len = len;
1775fd3e 3545 data->arg.label = label;
1da177e4 3546
57dc9a57
TM		 3547 status = nfs4_do_create(dir, dentry, data);
3548
3549 nfs4_free_createdata(data);
3550out:
1da177e4
LT		 3551 return status;
3552}
3553
4f390c15 3554static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3555 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3556{
3557 struct nfs4_exception exception = { };
aa9c2669 3558 struct nfs4_label l, *label = NULL;
1da177e4 3559 int err;
aa9c2669
DQ		 3560
3561 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3562
1da177e4 3563 do {
078ea3df
TM		 3564 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3565 trace_nfs4_symlink(dir, &dentry->d_name, err);
3566 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3567 &exception);
3568 } while (exception.retry);
aa9c2669
DQ		 3569
3570 nfs4_label_release_security(label);
1da177e4
LT		 3571 return err;
3572}
3573
3574static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3575 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3576{
57dc9a57
TM		 3577 struct nfs4_createdata *data;
3578 int status = -ENOMEM;
1da177e4 3579
57dc9a57
TM		 3580 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3581 if (data == NULL)
3582 goto out;
3583
1775fd3e 3584 data->arg.label = label;
57dc9a57
TM		 3585 status = nfs4_do_create(dir, dentry, data);
3586
3587 nfs4_free_createdata(data);
3588out:
1da177e4
LT		 3589 return status;
3590}
3591
3592static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3593 struct iattr *sattr)
3594{
3595 struct nfs4_exception exception = { };
aa9c2669 3596 struct nfs4_label l, *label = NULL;
1da177e4 3597 int err;
a8a5da99 3598
aa9c2669
DQ		 3599 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3600
a8a5da99 3601 sattr->ia_mode &= ~current_umask();
1da177e4 3602 do {
078ea3df
TM		 3603 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3604 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3605 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3606 &exception);
3607 } while (exception.retry);
aa9c2669
DQ		 3608 nfs4_label_release_security(label);
3609
1da177e4
LT		 3610 return err;
3611}
3612
3613static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3614 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3615{
3616 struct inode *dir = dentry->d_inode;
3617 struct nfs4_readdir_arg args = {
3618 .fh = NFS_FH(dir),
56e4ebf8 3619 .pages = pages,
1da177e4
LT		 3620 .pgbase = 0,
3621 .count = count,
96d25e53 3622 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3623 .plus = plus,
1da177e4
LT		 3624 };
3625 struct nfs4_readdir_res res;
3626 struct rpc_message msg = {
3627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3628 .rpc_argp = &args,
3629 .rpc_resp = &res,
3630 .rpc_cred = cred,
3631 };
3632 int status;
3633
3110ff80 3634 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3635 dentry->d_parent->d_name.name,
3636 dentry->d_name.name,
3637 (unsigned long long)cookie);
c3f52af3 3638 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3639 res.pgbase = args.pgbase;
7c513058 3640 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3641 if (status >= 0) {
c3f52af3 3642 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3643 status += args.pgbase;
3644 }
c4812998
TM		 3645
3646 nfs_invalidate_atime(dir);
3647
3110ff80 3648 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3649 return status;
3650}
3651
3652static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3653 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3654{
3655 struct nfs4_exception exception = { };
3656 int err;
3657 do {
c1578b76
TM		 3658 err = _nfs4_proc_readdir(dentry, cred, cookie,
3659 pages, count, plus);
3660 trace_nfs4_readdir(dentry->d_inode, err);
3661 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3662 &exception);
3663 } while (exception.retry);
3664 return err;
3665}
3666
3667static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3668 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3669{
57dc9a57
TM		 3670 struct nfs4_createdata *data;
3671 int mode = sattr->ia_mode;
3672 int status = -ENOMEM;
1da177e4 3673
57dc9a57
TM		 3674 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3675 if (data == NULL)
3676 goto out;
3677
1da177e4 3678 if (S_ISFIFO(mode))
57dc9a57 3679 data->arg.ftype = NF4FIFO;
1da177e4 3680 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3681 data->arg.ftype = NF4BLK;
3682 data->arg.u.device.specdata1 = MAJOR(rdev);
3683 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3684 }
3685 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3686 data->arg.ftype = NF4CHR;
3687 data->arg.u.device.specdata1 = MAJOR(rdev);
3688 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3689 } else if (!S_ISSOCK(mode)) {
3690 status = -EINVAL;
3691 goto out_free;
1da177e4 3692 }
1775fd3e 3693
aa9c2669 3694 data->arg.label = label;
57dc9a57 3695 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3696out_free:
57dc9a57
TM		 3697 nfs4_free_createdata(data);
3698out:
1da177e4
LT		 3699 return status;
3700}
3701
3702static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3703 struct iattr *sattr, dev_t rdev)
3704{
3705 struct nfs4_exception exception = { };
aa9c2669 3706 struct nfs4_label l, *label = NULL;
1da177e4 3707 int err;
a8a5da99 3708
aa9c2669
DQ		 3709 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3710
a8a5da99 3711 sattr->ia_mode &= ~current_umask();
1da177e4 3712 do {
078ea3df
TM		 3713 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3714 trace_nfs4_mknod(dir, &dentry->d_name, err);
3715 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3716 &exception);
3717 } while (exception.retry);
aa9c2669
DQ		 3718
3719 nfs4_label_release_security(label);
3720
1da177e4
LT		 3721 return err;
3722}
3723
3724static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3725 struct nfs_fsstat *fsstat)
3726{
3727 struct nfs4_statfs_arg args = {
3728 .fh = fhandle,
3729 .bitmask = server->attr_bitmask,
3730 };
24ad148a
BH		 3731 struct nfs4_statfs_res res = {
3732 .fsstat = fsstat,
3733 };
1da177e4
LT		 3734 struct rpc_message msg = {
3735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3736 .rpc_argp = &args,
24ad148a 3737 .rpc_resp = &res,
1da177e4
LT		 3738 };
3739
0e574af1 3740 nfs_fattr_init(fsstat->fattr);
7c513058 3741 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3742}
3743
3744static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3745{
3746 struct nfs4_exception exception = { };
3747 int err;
3748 do {
3749 err = nfs4_handle_exception(server,
3750 _nfs4_proc_statfs(server, fhandle, fsstat),
3751 &exception);
3752 } while (exception.retry);
3753 return err;
3754}
3755
3756static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3757 struct nfs_fsinfo *fsinfo)
3758{
3759 struct nfs4_fsinfo_arg args = {
3760 .fh = fhandle,
3761 .bitmask = server->attr_bitmask,
3762 };
3dda5e43
BH		 3763 struct nfs4_fsinfo_res res = {
3764 .fsinfo = fsinfo,
3765 };
1da177e4
LT		 3766 struct rpc_message msg = {
3767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3768 .rpc_argp = &args,
3dda5e43 3769 .rpc_resp = &res,
1da177e4
LT		 3770 };
3771
7c513058 3772 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3773}
3774
3775static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3776{
3777 struct nfs4_exception exception = { };
83ca7f5a 3778 unsigned long now = jiffies;
1da177e4
LT		 3779 int err;
3780
3781 do {
83ca7f5a 3782 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3783 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3784 if (err == 0) {
3785 struct nfs_client *clp = server->nfs_client;
3786
3787 spin_lock(&clp->cl_lock);
3788 clp->cl_lease_time = fsinfo->lease_time * HZ;
3789 clp->cl_last_renewal = now;
3790 spin_unlock(&clp->cl_lock);
3791 break;
3792 }
3793 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3794 } while (exception.retry);
3795 return err;
3796}
3797
3798static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3799{
e38eb650
BS		 3800 int error;
3801
0e574af1 3802 nfs_fattr_init(fsinfo->fattr);
e38eb650 3803 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3804 if (error == 0) {
3805 /* block layout checks this! */
3806 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3807 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3808 }
e38eb650
BS		 3809
3810 return error;
1da177e4
LT		 3811}
3812
3813static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3814 struct nfs_pathconf *pathconf)
3815{
3816 struct nfs4_pathconf_arg args = {
3817 .fh = fhandle,
3818 .bitmask = server->attr_bitmask,
3819 };
d45b2989
BH		 3820 struct nfs4_pathconf_res res = {
3821 .pathconf = pathconf,
3822 };
1da177e4
LT		 3823 struct rpc_message msg = {
3824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3825 .rpc_argp = &args,
d45b2989 3826 .rpc_resp = &res,
1da177e4
LT		 3827 };
3828
3829 /* None of the pathconf attributes are mandatory to implement */
3830 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3831 memset(pathconf, 0, sizeof(*pathconf));
3832 return 0;
3833 }
3834
0e574af1 3835 nfs_fattr_init(pathconf->fattr);
7c513058 3836 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3837}
3838
3839static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3840 struct nfs_pathconf *pathconf)
3841{
3842 struct nfs4_exception exception = { };
3843 int err;
3844
3845 do {
3846 err = nfs4_handle_exception(server,
3847 _nfs4_proc_pathconf(server, fhandle, pathconf),
3848 &exception);
3849 } while (exception.retry);
3850 return err;
3851}
3852
5521abfd 3853int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3854 const struct nfs_open_context *ctx,
3855 const struct nfs_lock_context *l_ctx,
3856 fmode_t fmode)
3857{
3858 const struct nfs_lockowner *lockowner = NULL;
3859
3860 if (l_ctx != NULL)
3861 lockowner = &l_ctx->lockowner;
5521abfd 3862 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3863}
3864EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3865
5521abfd
TM		 3866static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3867 const struct nfs_open_context *ctx,
3868 const struct nfs_lock_context *l_ctx,
3869 fmode_t fmode)
3870{
3871 nfs4_stateid current_stateid;
3872
3873 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3874 return false;
3875 return nfs4_stateid_match(stateid, &current_stateid);
3876}
3877
3878static bool nfs4_error_stateid_expired(int err)
3879{
3880 switch (err) {
3881 case -NFS4ERR_DELEG_REVOKED:
3882 case -NFS4ERR_ADMIN_REVOKED:
3883 case -NFS4ERR_BAD_STATEID:
3884 case -NFS4ERR_STALE_STATEID:
3885 case -NFS4ERR_OLD_STATEID:
3886 case -NFS4ERR_OPENMODE:
3887 case -NFS4ERR_EXPIRED:
3888 return true;
3889 }
3890 return false;
3891}
3892
d20581aa
BH		 3893void __nfs4_read_done_cb(struct nfs_read_data *data)
3894{
cd841605 3895 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3896}
3897
cbdabc7f 3898static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3899{
cd841605 3900 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3901
cc668ab3 3902 trace_nfs4_read(data, task->tk_status);
9e33bed5 3903 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3904 rpc_restart_call_prepare(task);
ec06c096 3905 return -EAGAIN;
1da177e4 3906 }
8850df99 3907
d20581aa 3908 __nfs4_read_done_cb(data);
1da177e4 3909 if (task->tk_status > 0)
ec06c096
TM		 3910 renew_lease(server, data->timestamp);
3911 return 0;
1da177e4
LT		 3912}
3913
5521abfd
TM		 3914static bool nfs4_read_stateid_changed(struct rpc_task *task,
3915 struct nfs_readargs *args)
3916{
3917
3918 if (!nfs4_error_stateid_expired(task->tk_status) ||
3919 nfs4_stateid_is_current(&args->stateid,
3920 args->context,
3921 args->lock_context,
3922 FMODE_READ))
3923 return false;
3924 rpc_restart_call_prepare(task);
3925 return true;
3926}
3927
cbdabc7f
AA		 3928static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3929{
3930
3931 dprintk("--> %s\n", __func__);
3932
3933 if (!nfs4_sequence_done(task, &data->res.seq_res))
3934 return -EAGAIN;
5521abfd
TM		 3935 if (nfs4_read_stateid_changed(task, &data->args))
3936 return -EAGAIN;
d20581aa
BH		 3937 return data->read_done_cb ? data->read_done_cb(task, data) :
3938 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3939}
3940
bdc7f021 3941static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3942{
1da177e4 3943 data->timestamp = jiffies;
cbdabc7f 3944 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3945 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 3946 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3947}
3948
ea7c3303
BS		 3949static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3950{
9b206149 3951 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3952 &data->args.seq_args,
3953 &data->res.seq_res,
9b206149
TM		 3954 task))
3955 return;
3956 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3957 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3958}
3959
b029bc9b 3960static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3961{
cd841605 3962 struct inode *inode = data->header->inode;
1da177e4 3963
cc668ab3 3964 trace_nfs4_write(data, task->tk_status);
9e33bed5 3965 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3966 rpc_restart_call_prepare(task);
788e7a89 3967 return -EAGAIN;
1da177e4 3968 }
4f9838c7 3969 if (task->tk_status >= 0) {
1da177e4 3970 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3971 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3972 }
788e7a89 3973 return 0;
1da177e4
LT		 3974}
3975
5521abfd
TM		 3976static bool nfs4_write_stateid_changed(struct rpc_task *task,
3977 struct nfs_writeargs *args)
3978{
3979
3980 if (!nfs4_error_stateid_expired(task->tk_status) ||
3981 nfs4_stateid_is_current(&args->stateid,
3982 args->context,
3983 args->lock_context,
3984 FMODE_WRITE))
3985 return false;
3986 rpc_restart_call_prepare(task);
3987 return true;
3988}
3989
b029bc9b
FI		 3990static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3991{
3992 if (!nfs4_sequence_done(task, &data->res.seq_res))
3993 return -EAGAIN;
5521abfd
TM		 3994 if (nfs4_write_stateid_changed(task, &data->args))
3995 return -EAGAIN;
d20581aa
BH		 3996 return data->write_done_cb ? data->write_done_cb(task, data) :
3997 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3998}
3999
5a37f851
TM		 4000static
4001bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4002{
5a37f851
TM		 4003 const struct nfs_pgio_header *hdr = data->header;
4004
4005 /* Don't request attributes for pNFS or O_DIRECT writes */
4006 if (data->ds_clp != NULL || hdr->dreq != NULL)
4007 return false;
4008 /* Otherwise, request attributes if and only if we don't hold
4009 * a delegation
4010 */
011e2a7f 4011 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4012}
a69aef14 4013
bdc7f021 4014static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4015{
cd841605 4016 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4017
5a37f851 4018 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4019 data->args.bitmask = NULL;
4020 data->res.fattr = NULL;
4021 } else
4022 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4023
b029bc9b
FI		 4024 if (!data->write_done_cb)
4025 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4026 data->res.server = server;
1da177e4
LT		 4027 data->timestamp = jiffies;
4028
bdc7f021 4029 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4030 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4031}
4032
c6cb80d0
BS		 4033static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4034{
9b206149 4035 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4036 &data->args.seq_args,
4037 &data->res.seq_res,
9b206149
TM		 4038 task))
4039 return;
4040 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4041 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4042}
4043
0b7c0153 4044static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4045{
d9afbd1b
TM		 4046 nfs4_setup_sequence(NFS_SERVER(data->inode),
4047 &data->args.seq_args,
4048 &data->res.seq_res,
4049 task);
1da177e4
LT		 4050}
4051
0b7c0153 4052static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4053{
1da177e4 4054 struct inode *inode = data->inode;
14516c3a 4055
cc668ab3 4056 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4057 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4058 rpc_restart_call_prepare(task);
788e7a89 4059 return -EAGAIN;
1da177e4 4060 }
788e7a89 4061 return 0;
1da177e4
LT		 4062}
4063
0b7c0153 4064static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4065{
4066 if (!nfs4_sequence_done(task, &data->res.seq_res))
4067 return -EAGAIN;
0b7c0153 4068 return data->commit_done_cb(task, data);
5f452431
FI		 4069}
4070
0b7c0153 4071static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4072{
788e7a89 4073 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4074
0b7c0153
FI		 4075 if (data->commit_done_cb == NULL)
4076 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4077 data->res.server = server;
bdc7f021 4078 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4079 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4080}
4081
9bc4e3ca
CL		 4082struct nfs4_renewdata {
4083 struct nfs_client *client;
4084 unsigned long timestamp;
4085};
4086
1da177e4
LT		 4087/*
4088 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4089 * standalone procedure for queueing an asynchronous RENEW.
4090 */
9bc4e3ca 4091static void nfs4_renew_release(void *calldata)
dc96aef9 4092{
9bc4e3ca
CL		 4093 struct nfs4_renewdata *data = calldata;
4094 struct nfs_client *clp = data->client;
dc96aef9 4095
0851de06
AB		 4096 if (atomic_read(&clp->cl_count) > 1)
4097 nfs4_schedule_state_renewal(clp);
4098 nfs_put_client(clp);
9bc4e3ca 4099 kfree(data);
dc96aef9
AB		 4100}
4101
9bc4e3ca 4102static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4103{
9bc4e3ca
CL		 4104 struct nfs4_renewdata *data = calldata;
4105 struct nfs_client *clp = data->client;
4106 unsigned long timestamp = data->timestamp;
1da177e4 4107
c6d01c6f 4108 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4109 if (task->tk_status < 0) {
95baa25c 4110 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4111 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4112 return;
4113 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4114 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4115 return;
4116 }
4117 nfs4_schedule_path_down_recovery(clp);
1da177e4 4118 }
452e9352 4119 do_renew_lease(clp, timestamp);
1da177e4
LT		 4120}
4121
963d8fe5
TM		 4122static const struct rpc_call_ops nfs4_renew_ops = {
4123 .rpc_call_done = nfs4_renew_done,
dc96aef9 4124 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4125};
4126
2f60ea6b 4127static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4128{
4129 struct rpc_message msg = {
4130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4131 .rpc_argp = clp,
b4454fe1 4132 .rpc_cred = cred,
1da177e4 4133 };
9bc4e3ca 4134 struct nfs4_renewdata *data;
1da177e4 4135
2f60ea6b
TM		 4136 if (renew_flags == 0)
4137 return 0;
0851de06
AB		 4138 if (!atomic_inc_not_zero(&clp->cl_count))
4139 return -EIO;
b569ad34 4140 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4141 if (data == NULL)
4142 return -ENOMEM;
4143 data->client = clp;
4144 data->timestamp = jiffies;
bc7a05ca 4145 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4146 &nfs4_renew_ops, data);
1da177e4
LT		 4147}
4148
8534d4ec 4149static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4150{
4151 struct rpc_message msg = {
4152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4153 .rpc_argp = clp,
b4454fe1 4154 .rpc_cred = cred,
1da177e4
LT		 4155 };
4156 unsigned long now = jiffies;
4157 int status;
4158
bc7a05ca 4159 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4160 if (status < 0)
4161 return status;
452e9352 4162 do_renew_lease(clp, now);
1da177e4
LT		 4163 return 0;
4164}
4165
aa1870af
BF		 4166static inline int nfs4_server_supports_acls(struct nfs_server *server)
4167{
4168 return (server->caps & NFS_CAP_ACLS)
4169 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4170 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4171}
4172
21f498c2
TM		 4173/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4174 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4175 * the stack.
4176 */
21f498c2 4177#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4178
e9e3d724
NH		 4179static int buf_to_pages_noslab(const void *buf, size_t buflen,
4180 struct page **pages, unsigned int *pgbase)
4181{
4182 struct page *newpage, **spages;
4183 int rc = 0;
4184 size_t len;
4185 spages = pages;
4186
4187 do {
21f498c2 4188 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4189 newpage = alloc_page(GFP_KERNEL);
4190
4191 if (newpage == NULL)
4192 goto unwind;
4193 memcpy(page_address(newpage), buf, len);
4194 buf += len;
4195 buflen -= len;
4196 *pages++ = newpage;
4197 rc++;
4198 } while (buflen != 0);
4199
4200 return rc;
4201
4202unwind:
4203 for(; rc > 0; rc--)
4204 __free_page(spages[rc-1]);
4205 return -ENOMEM;
4206}
4207
e50a1c2e
BF		 4208struct nfs4_cached_acl {
4209 int cached;
4210 size_t len;
3e9d4154 4211 char data[0];
e50a1c2e
BF		 4212};
4213
4214static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4215{
4216 struct nfs_inode *nfsi = NFS_I(inode);
4217
4218 spin_lock(&inode->i_lock);
4219 kfree(nfsi->nfs4_acl);
4220 nfsi->nfs4_acl = acl;
4221 spin_unlock(&inode->i_lock);
4222}
4223
4224static void nfs4_zap_acl_attr(struct inode *inode)
4225{
4226 nfs4_set_cached_acl(inode, NULL);
4227}
4228
4229static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4230{
4231 struct nfs_inode *nfsi = NFS_I(inode);
4232 struct nfs4_cached_acl *acl;
4233 int ret = -ENOENT;
4234
4235 spin_lock(&inode->i_lock);
4236 acl = nfsi->nfs4_acl;
4237 if (acl == NULL)
4238 goto out;
4239 if (buf == NULL) /* user is just asking for length */
4240 goto out_len;
4241 if (acl->cached == 0)
4242 goto out;
4243 ret = -ERANGE; /* see getxattr(2) man page */
4244 if (acl->len > buflen)
4245 goto out;
4246 memcpy(buf, acl->data, acl->len);
4247out_len:
4248 ret = acl->len;
4249out:
4250 spin_unlock(&inode->i_lock);
4251 return ret;
4252}
4253
5794d21e 4254static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4255{
4256 struct nfs4_cached_acl *acl;
b291f1b1 4257 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4258
1f1ea6c2 4259 if (buflen <= PAGE_SIZE) {
b291f1b1 4260 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4261 if (acl == NULL)
4262 goto out;
4263 acl->cached = 1;
5794d21e 4264 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4265 } else {
4266 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4267 if (acl == NULL)
4268 goto out;
4269 acl->cached = 0;
4270 }
4271 acl->len = acl_len;
4272out:
4273 nfs4_set_cached_acl(inode, acl);
4274}
4275
bf118a34
AA		 4276/*
4277 * The getxattr API returns the required buffer length when called with a
4278 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4279 * the required buf. On a NULL buf, we send a page of data to the server
4280 * guessing that the ACL request can be serviced by a page. If so, we cache
4281 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4282 * the cache. If not so, we throw away the page, and cache the required
4283 * length. The next getxattr call will then produce another round trip to
4284 * the server, this time with the input buf of the required size.
4285 */
16b4289c 4286static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4287{
bf118a34 4288 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4289 struct nfs_getaclargs args = {
4290 .fh = NFS_FH(inode),
4291 .acl_pages = pages,
4292 .acl_len = buflen,
4293 };
663c79b3
BH		 4294 struct nfs_getaclres res = {
4295 .acl_len = buflen,
4296 };
aa1870af
BF		 4297 struct rpc_message msg = {
4298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4299 .rpc_argp = &args,
663c79b3 4300 .rpc_resp = &res,
aa1870af 4301 };
21f498c2
TM		 4302 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4303 int ret = -ENOMEM, i;
aa1870af 4304
bf118a34
AA		 4305 /* As long as we're doing a round trip to the server anyway,
4306 * let's be prepared for a page of acl data. */
4307 if (npages == 0)
4308 npages = 1;
21f498c2
TM		 4309 if (npages > ARRAY_SIZE(pages))
4310 return -ERANGE;
5a006899 4311
bf118a34
AA		 4312 for (i = 0; i < npages; i++) {
4313 pages[i] = alloc_page(GFP_KERNEL);
4314 if (!pages[i])
4315 goto out_free;
e50a1c2e 4316 }
5a006899
SP		 4317
4318 /* for decoding across pages */
4319 res.acl_scratch = alloc_page(GFP_KERNEL);
4320 if (!res.acl_scratch)
4321 goto out_free;
4322
bf118a34
AA		 4323 args.acl_len = npages * PAGE_SIZE;
4324 args.acl_pgbase = 0;
5a006899 4325
de040bec 4326 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4327 __func__, buf, buflen, npages, args.acl_len);
4328 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4329 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4330 if (ret)
4331 goto out_free;
bf118a34 4332
1f1ea6c2
TM		 4333 /* Handle the case where the passed-in buffer is too short */
4334 if (res.acl_flags & NFS4_ACL_TRUNC) {
4335 /* Did the user only issue a request for the acl length? */
4336 if (buf == NULL)
4337 goto out_ok;
e50a1c2e 4338 ret = -ERANGE;
1f1ea6c2 4339 goto out_free;
e50a1c2e 4340 }
1f1ea6c2 4341 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4342 if (buf) {
4343 if (res.acl_len > buflen) {
4344 ret = -ERANGE;
4345 goto out_free;
4346 }
1f1ea6c2 4347 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4348 }
1f1ea6c2
TM		 4349out_ok:
4350 ret = res.acl_len;
e50a1c2e 4351out_free:
bf118a34
AA		 4352 for (i = 0; i < npages; i++)
4353 if (pages[i])
4354 __free_page(pages[i]);
331818f1
TM		 4355 if (res.acl_scratch)
4356 __free_page(res.acl_scratch);
aa1870af
BF		 4357 return ret;
4358}
4359
16b4289c
TM		 4360static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4361{
4362 struct nfs4_exception exception = { };
4363 ssize_t ret;
4364 do {
4365 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4366 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4367 if (ret >= 0)
4368 break;
4369 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4370 } while (exception.retry);
4371 return ret;
4372}
4373
e50a1c2e
BF		 4374static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4375{
4376 struct nfs_server *server = NFS_SERVER(inode);
4377 int ret;
4378
4379 if (!nfs4_server_supports_acls(server))
4380 return -EOPNOTSUPP;
4381 ret = nfs_revalidate_inode(server, inode);
4382 if (ret < 0)
4383 return ret;
08a22b39
AK		 4384 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4385 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4386 ret = nfs4_read_cached_acl(inode, buf, buflen);
4387 if (ret != -ENOENT)
bf118a34
AA		 4388 /* -ENOENT is returned if there is no ACL or if there is an ACL
4389 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4390 return ret;
4391 return nfs4_get_acl_uncached(inode, buf, buflen);
4392}
4393
16b4289c 4394static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4395{
4396 struct nfs_server *server = NFS_SERVER(inode);
4397 struct page *pages[NFS4ACL_MAXPAGES];
4398 struct nfs_setaclargs arg = {
4399 .fh = NFS_FH(inode),
4400 .acl_pages = pages,
4401 .acl_len = buflen,
4402 };
73c403a9 4403 struct nfs_setaclres res;
4b580ee3
BF		 4404 struct rpc_message msg = {
4405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4406 .rpc_argp = &arg,
73c403a9 4407 .rpc_resp = &res,
4b580ee3 4408 };
21f498c2 4409 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4410 int ret, i;
4b580ee3
BF		 4411
4412 if (!nfs4_server_supports_acls(server))
4413 return -EOPNOTSUPP;
21f498c2
TM		 4414 if (npages > ARRAY_SIZE(pages))
4415 return -ERANGE;
e9e3d724
NH		 4416 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4417 if (i < 0)
4418 return i;
57ec14c5 4419 nfs4_inode_return_delegation(inode);
7c513058 4420 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4421
4422 /*
4423 * Free each page after tx, so the only ref left is
4424 * held by the network stack
4425 */
4426 for (; i > 0; i--)
4427 put_page(pages[i-1]);
4428
08a22b39
AK		 4429 /*
4430 * Acl update can result in inode attribute update.
4431 * so mark the attribute cache invalid.
4432 */
4433 spin_lock(&inode->i_lock);
4434 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4435 spin_unlock(&inode->i_lock);
f41f7418
TM		 4436 nfs_access_zap_cache(inode);
4437 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4438 return ret;
4439}
4440
16b4289c
TM		 4441static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4442{
4443 struct nfs4_exception exception = { };
4444 int err;
4445 do {
c1578b76
TM		 4446 err = __nfs4_proc_set_acl(inode, buf, buflen);
4447 trace_nfs4_set_acl(inode, err);
4448 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4449 &exception);
4450 } while (exception.retry);
4451 return err;
4452}
4453
aa9c2669
DQ		 4454#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4455static int _nfs4_get_security_label(struct inode *inode, void *buf,
4456 size_t buflen)
4457{
4458 struct nfs_server *server = NFS_SERVER(inode);
4459 struct nfs_fattr fattr;
4460 struct nfs4_label label = {0, 0, buflen, buf};
4461
4462 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4463 struct nfs4_getattr_arg args = {
4464 .fh = NFS_FH(inode),
4465 .bitmask = bitmask,
4466 };
4467 struct nfs4_getattr_res res = {
4468 .fattr = &fattr,
4469 .label = &label,
4470 .server = server,
4471 };
4472 struct rpc_message msg = {
4473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4474 .rpc_argp = &args,
4475 .rpc_resp = &res,
4476 };
4477 int ret;
4478
4479 nfs_fattr_init(&fattr);
4480
4481 ret = rpc_call_sync(server->client, &msg, 0);
4482 if (ret)
4483 return ret;
4484 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4485 return -ENOENT;
4486 if (buflen < label.len)
4487 return -ERANGE;
4488 return 0;
4489}
4490
4491static int nfs4_get_security_label(struct inode *inode, void *buf,
4492 size_t buflen)
4493{
4494 struct nfs4_exception exception = { };
4495 int err;
4496
4497 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4498 return -EOPNOTSUPP;
4499
4500 do {
c1578b76
TM		 4501 err = _nfs4_get_security_label(inode, buf, buflen);
4502 trace_nfs4_get_security_label(inode, err);
4503 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4504 &exception);
4505 } while (exception.retry);
4506 return err;
4507}
4508
4509static int _nfs4_do_set_security_label(struct inode *inode,
4510 struct nfs4_label *ilabel,
4511 struct nfs_fattr *fattr,
4512 struct nfs4_label *olabel)
4513{
4514
4515 struct iattr sattr = {0};
4516 struct nfs_server *server = NFS_SERVER(inode);
4517 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4518 struct nfs_setattrargs args = {
4519 .fh = NFS_FH(inode),
4520 .iap = &sattr,
4521 .server = server,
4522 .bitmask = bitmask,
4523 .label = ilabel,
4524 };
4525 struct nfs_setattrres res = {
4526 .fattr = fattr,
4527 .label = olabel,
4528 .server = server,
4529 };
4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4532 .rpc_argp = &args,
4533 .rpc_resp = &res,
4534 };
4535 int status;
4536
4537 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4538
4539 status = rpc_call_sync(server->client, &msg, 0);
4540 if (status)
4541 dprintk("%s failed: %d\n", __func__, status);
4542
4543 return status;
4544}
4545
4546static int nfs4_do_set_security_label(struct inode *inode,
4547 struct nfs4_label *ilabel,
4548 struct nfs_fattr *fattr,
4549 struct nfs4_label *olabel)
4550{
4551 struct nfs4_exception exception = { };
4552 int err;
4553
4554 do {
c1578b76
TM		 4555 err = _nfs4_do_set_security_label(inode, ilabel,
4556 fattr, olabel);
4557 trace_nfs4_set_security_label(inode, err);
4558 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4559 &exception);
4560 } while (exception.retry);
4561 return err;
4562}
4563
4564static int
4565nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4566{
4567 struct nfs4_label ilabel, *olabel = NULL;
4568 struct nfs_fattr fattr;
4569 struct rpc_cred *cred;
4570 struct inode *inode = dentry->d_inode;
4571 int status;
4572
4573 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4574 return -EOPNOTSUPP;
4575
4576 nfs_fattr_init(&fattr);
4577
4578 ilabel.pi = 0;
4579 ilabel.lfs = 0;
4580 ilabel.label = (char *)buf;
4581 ilabel.len = buflen;
4582
4583 cred = rpc_lookup_cred();
4584 if (IS_ERR(cred))
4585 return PTR_ERR(cred);
4586
4587 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4588 if (IS_ERR(olabel)) {
4589 status = -PTR_ERR(olabel);
4590 goto out;
4591 }
4592
4593 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4594 if (status == 0)
4595 nfs_setsecurity(inode, &fattr, olabel);
4596
4597 nfs4_label_free(olabel);
4598out:
4599 put_rpccred(cred);
4600 return status;
4601}
4602#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4603
4604
1da177e4 4605static int
aa5190d0 4606nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4607{
aa5190d0
TM		 4608 struct nfs_client *clp = server->nfs_client;
4609
4610 if (task->tk_status >= 0)
1da177e4
LT		 4611 return 0;
4612 switch(task->tk_status) {
a1d0b5ee 4613 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4614 case -NFS4ERR_ADMIN_REVOKED:
4615 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4616 if (state == NULL)
4617 break;
4618 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4619 case -NFS4ERR_OPENMODE:
4620 if (state == NULL)
4621 break;
5d422301
TM		 4622 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4623 goto stateid_invalid;
0400a6b0 4624 goto wait_on_recovery;
0ced63d1 4625 case -NFS4ERR_EXPIRED:
5d422301
TM		 4626 if (state != NULL) {
4627 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4628 goto stateid_invalid;
4629 }
1da177e4 4630 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4631 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4632 nfs4_schedule_lease_recovery(clp);
4633 goto wait_on_recovery;
4745e315
AA		 4634#if defined(CONFIG_NFS_V4_1)
4635 case -NFS4ERR_BADSESSION:
4636 case -NFS4ERR_BADSLOT:
4637 case -NFS4ERR_BAD_HIGH_SLOT:
4638 case -NFS4ERR_DEADSESSION:
4639 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4640 case -NFS4ERR_SEQ_FALSE_RETRY:
4641 case -NFS4ERR_SEQ_MISORDERED:
4642 dprintk("%s ERROR %d, Reset session\n", __func__,
4643 task->tk_status);
9f594791 4644 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4645 task->tk_status = 0;
4646 return -EAGAIN;
4647#endif /* CONFIG_NFS_V4_1 */
1da177e4 4648 case -NFS4ERR_DELAY:
aa5190d0 4649 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4650 case -NFS4ERR_GRACE:
1da177e4
LT		 4651 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4652 task->tk_status = 0;
4653 return -EAGAIN;
a8a4ae3a 4654 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4655 case -NFS4ERR_OLD_STATEID:
4656 task->tk_status = 0;
4657 return -EAGAIN;
4658 }
4659 task->tk_status = nfs4_map_errors(task->tk_status);
4660 return 0;
5d422301
TM		 4661stateid_invalid:
4662 task->tk_status = -EIO;
4663 return 0;
0400a6b0 4664wait_on_recovery:
a2c0b9e2 4665 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4666 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4667 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4668 task->tk_status = 0;
4669 return -EAGAIN;
1da177e4
LT		 4670}
4671
f092075d
CL		 4672static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4673 nfs4_verifier *bootverf)
cd93710e
CL		 4674{
4675 __be32 verf[2];
4676
2c820d9a
CL		 4677 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4678 /* An impossible timestamp guarantees this value
4679 * will never match a generated boot time. */
4680 verf[0] = 0;
17f26b12 4681 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4682 } else {
f092075d 4683 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4684 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4685 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4686 }
cd93710e
CL		 4687 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4688}
4689
e984a55a
CL		 4690static unsigned int
4691nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4692 char *buf, size_t len)
4693{
4694 unsigned int result;
4695
4696 rcu_read_lock();
4697 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4698 clp->cl_ipaddr,
4699 rpc_peeraddr2str(clp->cl_rpcclient,
4700 RPC_DISPLAY_ADDR),
4701 rpc_peeraddr2str(clp->cl_rpcclient,
4702 RPC_DISPLAY_PROTO));
4703 rcu_read_unlock();
4704 return result;
4705}
4706
4707static unsigned int
4708nfs4_init_uniform_client_string(const struct nfs_client *clp,
4709 char *buf, size_t len)
4710{
55b59293 4711 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4712
4713 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4714 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4715 clp->rpc_ops->version,
4716 clp->cl_minorversion,
4717 nfs4_client_id_uniquifier,
4718 nodename);
e984a55a
CL		 4719 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4720 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4721 nodename);
e984a55a
CL		 4722}
4723
6bbb4ae8
CL		 4724/**
4725 * nfs4_proc_setclientid - Negotiate client ID
4726 * @clp: state data structure
4727 * @program: RPC program for NFSv4 callback service
4728 * @port: IP port number for NFS4 callback service
4729 * @cred: RPC credential to use for this call
4730 * @res: where to place the result
4731 *
4732 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4733 */
bb8b27e5
TM		 4734int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4735 unsigned short port, struct rpc_cred *cred,
4736 struct nfs4_setclientid_res *res)
1da177e4
LT		 4737{
4738 nfs4_verifier sc_verifier;
4739 struct nfs4_setclientid setclientid = {
4740 .sc_verifier = &sc_verifier,
4741 .sc_prog = program,
f4eecd5d 4742 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4743 };
4744 struct rpc_message msg = {
4745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4746 .rpc_argp = &setclientid,
bb8b27e5 4747 .rpc_resp = res,
286d7d6a 4748 .rpc_cred = cred,
1da177e4 4749 };
6bbb4ae8 4750 int status;
1da177e4 4751
de734831 4752 /* nfs_client_id4 */
f092075d 4753 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4754 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4755 setclientid.sc_name_len =
4756 nfs4_init_uniform_client_string(clp,
4757 setclientid.sc_name,
4758 sizeof(setclientid.sc_name));
4759 else
4760 setclientid.sc_name_len =
4761 nfs4_init_nonuniform_client_string(clp,
4762 setclientid.sc_name,
4763 sizeof(setclientid.sc_name));
de734831 4764 /* cb_client4 */
e984a55a 4765 rcu_read_lock();
de734831 4766 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4767 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4768 rpc_peeraddr2str(clp->cl_rpcclient,
4769 RPC_DISPLAY_NETID));
de734831
CL		 4770 rcu_read_unlock();
4771 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4772 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4773 clp->cl_ipaddr, port >> 8, port & 255);
4774
6bbb4ae8
CL		 4775 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4776 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4777 setclientid.sc_name_len, setclientid.sc_name);
4778 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4779 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4780 dprintk("NFS reply setclientid: %d\n", status);
4781 return status;
1da177e4
LT		 4782}
4783
6bbb4ae8
CL		 4784/**
4785 * nfs4_proc_setclientid_confirm - Confirm client ID
4786 * @clp: state data structure
4787 * @res: result of a previous SETCLIENTID
4788 * @cred: RPC credential to use for this call
4789 *
4790 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4791 */
fd954ae1 4792int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4793 struct nfs4_setclientid_res *arg,
4794 struct rpc_cred *cred)
1da177e4 4795{
1da177e4
LT		 4796 struct rpc_message msg = {
4797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4798 .rpc_argp = arg,
286d7d6a 4799 .rpc_cred = cred,
1da177e4 4800 };
1da177e4
LT		 4801 int status;
4802
6bbb4ae8
CL		 4803 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4804 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4805 clp->cl_clientid);
1bd714f2 4806 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4807 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4808 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4809 return status;
4810}
4811
fe650407
TM		 4812struct nfs4_delegreturndata {
4813 struct nfs4_delegreturnargs args;
fa178f29 4814 struct nfs4_delegreturnres res;
fe650407
TM		 4815 struct nfs_fh fh;
4816 nfs4_stateid stateid;
26e976a8 4817 unsigned long timestamp;
fa178f29 4818 struct nfs_fattr fattr;
fe650407
TM		 4819 int rpc_status;
4820};
4821
fe650407
TM		 4822static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4823{
4824 struct nfs4_delegreturndata *data = calldata;
938e1010 4825
14516c3a
TM		 4826 if (!nfs4_sequence_done(task, &data->res.seq_res))
4827 return;
938e1010 4828
ca8acf8d 4829 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4830 switch (task->tk_status) {
4831 case -NFS4ERR_STALE_STATEID:
4832 case -NFS4ERR_EXPIRED:
4833 case 0:
fa178f29 4834 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4835 break;
4836 default:
4837 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4838 -EAGAIN) {
d00c5d43 4839 rpc_restart_call_prepare(task);
79708861
RL		 4840 return;
4841 }
4842 }
4843 data->rpc_status = task->tk_status;
fe650407
TM		 4844}
4845
4846static void nfs4_delegreturn_release(void *calldata)
4847{
fe650407
TM		 4848 kfree(calldata);
4849}
4850
938e1010
AA		 4851#if defined(CONFIG_NFS_V4_1)
4852static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4853{
4854 struct nfs4_delegreturndata *d_data;
4855
4856 d_data = (struct nfs4_delegreturndata *)data;
4857
d9afbd1b
TM		 4858 nfs4_setup_sequence(d_data->res.server,
4859 &d_data->args.seq_args,
4860 &d_data->res.seq_res,
4861 task);
938e1010
AA		 4862}
4863#endif /* CONFIG_NFS_V4_1 */
4864
c8d149f3 4865static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4866#if defined(CONFIG_NFS_V4_1)
4867 .rpc_call_prepare = nfs4_delegreturn_prepare,
4868#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4869 .rpc_call_done = nfs4_delegreturn_done,
4870 .rpc_release = nfs4_delegreturn_release,
4871};
4872
e6f81075 4873static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4874{
4875 struct nfs4_delegreturndata *data;
fa178f29 4876 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4877 struct rpc_task *task;
5138fde0
TM		 4878 struct rpc_message msg = {
4879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4880 .rpc_cred = cred,
4881 };
c970aa85
TM		 4882 struct rpc_task_setup task_setup_data = {
4883 .rpc_client = server->client,
5138fde0 4884 .rpc_message = &msg,
c970aa85
TM		 4885 .callback_ops = &nfs4_delegreturn_ops,
4886 .flags = RPC_TASK_ASYNC,
4887 };
e6f81075 4888 int status = 0;
fe650407 4889
8535b2be 4890 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4891 if (data == NULL)
4892 return -ENOMEM;
a9c92d6b 4893 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4894 data->args.fhandle = &data->fh;
4895 data->args.stateid = &data->stateid;
9e907fec 4896 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4897 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4898 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4899 data->res.fattr = &data->fattr;
4900 data->res.server = server;
5138fde0 4901 nfs_fattr_init(data->res.fattr);
26e976a8 4902 data->timestamp = jiffies;
fe650407
TM		 4903 data->rpc_status = 0;
4904
c970aa85 4905 task_setup_data.callback_data = data;
1174dd1f
TM		 4906 msg.rpc_argp = &data->args;
4907 msg.rpc_resp = &data->res;
c970aa85 4908 task = rpc_run_task(&task_setup_data);
7a1218a2 4909 if (IS_ERR(task))
fe650407 4910 return PTR_ERR(task);
e6f81075
TM		 4911 if (!issync)
4912 goto out;
fe650407 4913 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4914 if (status != 0)
4915 goto out;
4916 status = data->rpc_status;
e144cbcc
TM		 4917 if (status == 0)
4918 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4919 else
4920 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4921out:
e6b3c4db 4922 rpc_put_task(task);
fe650407 4923 return status;
1da177e4
LT		 4924}
4925
e6f81075 4926int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4927{
4928 struct nfs_server *server = NFS_SERVER(inode);
4929 struct nfs4_exception exception = { };
4930 int err;
4931 do {
e6f81075 4932 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4933 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4934 switch (err) {
4935 case -NFS4ERR_STALE_STATEID:
4936 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4937 case 0:
4938 return 0;
4939 }
4940 err = nfs4_handle_exception(server, err, &exception);
4941 } while (exception.retry);
4942 return err;
4943}
4944
4945#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4946#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4947
4948/*
4949 * sleep, with exponential backoff, and retry the LOCK operation.
4950 */
4951static unsigned long
4952nfs4_set_lock_task_retry(unsigned long timeout)
4953{
416ad3c9 4954 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4955 timeout <<= 1;
4956 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4957 return NFS4_LOCK_MAXTIMEOUT;
4958 return timeout;
4959}
4960
1da177e4
LT		 4961static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4962{
4963 struct inode *inode = state->inode;
4964 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4965 struct nfs_client *clp = server->nfs_client;
911d1aaf 4966 struct nfs_lockt_args arg = {
1da177e4 4967 .fh = NFS_FH(inode),
911d1aaf 4968 .fl = request,
1da177e4 4969 };
911d1aaf
TM		 4970 struct nfs_lockt_res res = {
4971 .denied = request,
1da177e4
LT		 4972 };
4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4975 .rpc_argp = &arg,
4976 .rpc_resp = &res,
4977 .rpc_cred = state->owner->so_cred,
4978 };
1da177e4
LT		 4979 struct nfs4_lock_state *lsp;
4980 int status;
4981
911d1aaf 4982 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4983 status = nfs4_set_lock_state(state, request);
4984 if (status != 0)
4985 goto out;
4986 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4987 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4988 arg.lock_owner.s_dev = server->s_dev;
7c513058 4989 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4990 switch (status) {
4991 case 0:
4992 request->fl_type = F_UNLCK;
4993 break;
4994 case -NFS4ERR_DENIED:
4995 status = 0;
1da177e4 4996 }
70cc6487 4997 request->fl_ops->fl_release_private(request);
8d0a8a9d 4998out:
1da177e4
LT		 4999 return status;
5000}
5001
5002static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5003{
5004 struct nfs4_exception exception = { };
5005 int err;
5006
5007 do {
d1b748a5
TM		 5008 err = _nfs4_proc_getlk(state, cmd, request);
5009 trace_nfs4_get_lock(request, state, cmd, err);
5010 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5011 &exception);
5012 } while (exception.retry);
5013 return err;
5014}
5015
5016static int do_vfs_lock(struct file *file, struct file_lock *fl)
5017{
5018 int res = 0;
5019 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5020 case FL_POSIX:
5021 res = posix_lock_file_wait(file, fl);
5022 break;
5023 case FL_FLOCK:
5024 res = flock_lock_file_wait(file, fl);
5025 break;
5026 default:
5027 BUG();
5028 }
1da177e4
LT		 5029 return res;
5030}
5031
faf5f49c 5032struct nfs4_unlockdata {
911d1aaf
TM		 5033 struct nfs_locku_args arg;
5034 struct nfs_locku_res res;
faf5f49c
TM		 5035 struct nfs4_lock_state *lsp;
5036 struct nfs_open_context *ctx;
911d1aaf
TM		 5037 struct file_lock fl;
5038 const struct nfs_server *server;
26e976a8 5039 unsigned long timestamp;
faf5f49c
TM		 5040};
5041
911d1aaf
TM		 5042static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5043 struct nfs_open_context *ctx,
5044 struct nfs4_lock_state *lsp,
5045 struct nfs_seqid *seqid)
5046{
5047 struct nfs4_unlockdata *p;
5048 struct inode *inode = lsp->ls_state->inode;
5049
8535b2be 5050 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5051 if (p == NULL)
5052 return NULL;
5053 p->arg.fh = NFS_FH(inode);
5054 p->arg.fl = &p->fl;
5055 p->arg.seqid = seqid;
c1d51931 5056 p->res.seqid = seqid;
911d1aaf
TM		 5057 p->arg.stateid = &lsp->ls_stateid;
5058 p->lsp = lsp;
5059 atomic_inc(&lsp->ls_count);
5060 /* Ensure we don't close file until we're done freeing locks! */
5061 p->ctx = get_nfs_open_context(ctx);
5062 memcpy(&p->fl, fl, sizeof(p->fl));
5063 p->server = NFS_SERVER(inode);
5064 return p;
5065}
5066
06f814a3 5067static void nfs4_locku_release_calldata(void *data)
faf5f49c 5068{
963d8fe5 5069 struct nfs4_unlockdata *calldata = data;
911d1aaf 5070 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5071 nfs4_put_lock_state(calldata->lsp);
5072 put_nfs_open_context(calldata->ctx);
5073 kfree(calldata);
faf5f49c
TM		 5074}
5075
963d8fe5 5076static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5077{
963d8fe5 5078 struct nfs4_unlockdata *calldata = data;
faf5f49c 5079
14516c3a
TM		 5080 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5081 return;
faf5f49c
TM		 5082 switch (task->tk_status) {
5083 case 0:
f597c537
TM		 5084 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5085 &calldata->res.stateid);
26e976a8 5086 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5087 break;
9e33bed5
TM		 5088 case -NFS4ERR_BAD_STATEID:
5089 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5090 case -NFS4ERR_STALE_STATEID:
5091 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5092 break;
5093 default:
9e33bed5 5094 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5095 rpc_restart_call_prepare(task);
faf5f49c 5096 }
2b1bc308 5097 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5098}
5099
4ce70ada 5100static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5101{
4ce70ada 5102 struct nfs4_unlockdata *calldata = data;
faf5f49c 5103
911d1aaf 5104 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5105 goto out_wait;
795a88c9 5106 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5107 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5108 goto out_no_action;
faf5f49c 5109 }
26e976a8 5110 calldata->timestamp = jiffies;
035168ab 5111 if (nfs4_setup_sequence(calldata->server,
a893693c 5112 &calldata->arg.seq_args,
2240a9e2
TM		 5113 &calldata->res.seq_res,
5114 task) != 0)
5115 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5116 return;
5117out_no_action:
5118 task->tk_action = NULL;
5119out_wait:
5120 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5121}
5122
963d8fe5 5123static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5124 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5125 .rpc_call_done = nfs4_locku_done,
06f814a3 5126 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5127};
5128
a5d16a4d
TM		 5129static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5130 struct nfs_open_context *ctx,
5131 struct nfs4_lock_state *lsp,
5132 struct nfs_seqid *seqid)
5133{
5134 struct nfs4_unlockdata *data;
5138fde0
TM		 5135 struct rpc_message msg = {
5136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5137 .rpc_cred = ctx->cred,
5138 };
c970aa85
TM		 5139 struct rpc_task_setup task_setup_data = {
5140 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5141 .rpc_message = &msg,
c970aa85 5142 .callback_ops = &nfs4_locku_ops,
101070ca 5143 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5144 .flags = RPC_TASK_ASYNC,
5145 };
a5d16a4d 5146
137d6aca
FF		 5147 /* Ensure this is an unlock - when canceling a lock, the
5148 * canceled lock is passed in, and it won't be an unlock.
5149 */
5150 fl->fl_type = F_UNLCK;
5151
a5d16a4d
TM		 5152 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5153 if (data == NULL) {
5154 nfs_free_seqid(seqid);
5155 return ERR_PTR(-ENOMEM);
5156 }
5157
a9c92d6b 5158 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5159 msg.rpc_argp = &data->arg;
5160 msg.rpc_resp = &data->res;
c970aa85
TM		 5161 task_setup_data.callback_data = data;
5162 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5163}
5164
faf5f49c
TM		 5165static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5166{
65b62a29
TM		 5167 struct inode *inode = state->inode;
5168 struct nfs4_state_owner *sp = state->owner;
5169 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5170 struct nfs_seqid *seqid;
1da177e4 5171 struct nfs4_lock_state *lsp;
06f814a3
TM		 5172 struct rpc_task *task;
5173 int status = 0;
536ff0f8 5174 unsigned char fl_flags = request->fl_flags;
faf5f49c 5175
8d0a8a9d 5176 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5177 /* Unlock _before_ we do the RPC call */
5178 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5179 /* Exclude nfs_delegation_claim_locks() */
5180 mutex_lock(&sp->so_delegreturn_mutex);
5181 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5182 down_read(&nfsi->rwsem);
5183 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5184 up_read(&nfsi->rwsem);
65b62a29 5185 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5186 goto out;
19e03c57
TM		 5187 }
5188 up_read(&nfsi->rwsem);
65b62a29 5189 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5190 if (status != 0)
9b073574
TM		 5191 goto out;
5192 /* Is this a delegated lock? */
8d0a8a9d 5193 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5194 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5195 goto out;
8535b2be 5196 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5197 status = -ENOMEM;
911d1aaf 5198 if (seqid == NULL)
9b073574 5199 goto out;
cd3758e3 5200 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5201 status = PTR_ERR(task);
5202 if (IS_ERR(task))
9b073574 5203 goto out;
a5d16a4d 5204 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5205 rpc_put_task(task);
9b073574 5206out:
536ff0f8 5207 request->fl_flags = fl_flags;
d1b748a5 5208 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5209 return status;
5210}
5211
a5d16a4d
TM		 5212struct nfs4_lockdata {
5213 struct nfs_lock_args arg;
5214 struct nfs_lock_res res;
5215 struct nfs4_lock_state *lsp;
5216 struct nfs_open_context *ctx;
5217 struct file_lock fl;
26e976a8 5218 unsigned long timestamp;
a5d16a4d
TM		 5219 int rpc_status;
5220 int cancelled;
66179efe 5221 struct nfs_server *server;
a5d16a4d
TM		 5222};
5223
5224static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5225 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5226 gfp_t gfp_mask)
1da177e4 5227{
a5d16a4d
TM		 5228 struct nfs4_lockdata *p;
5229 struct inode *inode = lsp->ls_state->inode;
1da177e4 5230 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5231
8535b2be 5232 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5233 if (p == NULL)
5234 return NULL;
5235
5236 p->arg.fh = NFS_FH(inode);
5237 p->arg.fl = &p->fl;
8535b2be 5238 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5239 if (p->arg.open_seqid == NULL)
5240 goto out_free;
8535b2be 5241 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5242 if (p->arg.lock_seqid == NULL)
2f74c0a0 5243 goto out_free_seqid;
a5d16a4d 5244 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5245 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5246 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5247 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5248 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5249 p->lsp = lsp;
66179efe 5250 p->server = server;
a5d16a4d
TM		 5251 atomic_inc(&lsp->ls_count);
5252 p->ctx = get_nfs_open_context(ctx);
5253 memcpy(&p->fl, fl, sizeof(p->fl));
5254 return p;
2f74c0a0
TM		 5255out_free_seqid:
5256 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5257out_free:
5258 kfree(p);
5259 return NULL;
5260}
5261
5262static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5263{
5264 struct nfs4_lockdata *data = calldata;
5265 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5266
3110ff80 5267 dprintk("%s: begin!\n", __func__);
2f74c0a0 5268 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5269 goto out_wait;
a5d16a4d
TM		 5270 /* Do we need to do an open_to_lock_owner? */
5271 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5272 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5273 goto out_release_lock_seqid;
8fe72bac 5274 }
8e472f33 5275 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5276 data->arg.new_lock_owner = 1;
c1d51931 5277 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5278 } else
5279 data->arg.new_lock_owner = 0;
5d422301
TM		 5280 if (!nfs4_valid_open_stateid(state)) {
5281 data->rpc_status = -EBADF;
5282 task->tk_action = NULL;
5283 goto out_release_open_seqid;
5284 }
26e976a8 5285 data->timestamp = jiffies;
035168ab
TM		 5286 if (nfs4_setup_sequence(data->server,
5287 &data->arg.seq_args,
2240a9e2 5288 &data->res.seq_res,
d9afbd1b 5289 task) == 0)
66179efe 5290 return;
5d422301 5291out_release_open_seqid:
2240a9e2
TM		 5292 nfs_release_seqid(data->arg.open_seqid);
5293out_release_lock_seqid:
5294 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5295out_wait:
5296 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5297 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5298}
5299
a5d16a4d
TM		 5300static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5301{
5302 struct nfs4_lockdata *data = calldata;
5303
3110ff80 5304 dprintk("%s: begin!\n", __func__);
a5d16a4d 5305
14516c3a
TM		 5306 if (!nfs4_sequence_done(task, &data->res.seq_res))
5307 return;
66179efe 5308
a5d16a4d 5309 data->rpc_status = task->tk_status;
a5d16a4d 5310 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5311 if (data->rpc_status == 0)
5312 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5313 else
5314 goto out;
5315 }
5316 if (data->rpc_status == 0) {
f597c537 5317 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5318 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5319 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5320 }
a5d16a4d 5321out:
3110ff80 5322 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5323}
5324
5325static void nfs4_lock_release(void *calldata)
5326{
5327 struct nfs4_lockdata *data = calldata;
5328
3110ff80 5329 dprintk("%s: begin!\n", __func__);
2f74c0a0 5330 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5331 if (data->cancelled != 0) {
5332 struct rpc_task *task;
5333 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5334 data->arg.lock_seqid);
5335 if (!IS_ERR(task))
bf294b41 5336 rpc_put_task_async(task);
3110ff80 5337 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5338 } else
5339 nfs_free_seqid(data->arg.lock_seqid);
5340 nfs4_put_lock_state(data->lsp);
5341 put_nfs_open_context(data->ctx);
5342 kfree(data);
3110ff80 5343 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5344}
5345
5346static const struct rpc_call_ops nfs4_lock_ops = {
5347 .rpc_call_prepare = nfs4_lock_prepare,
5348 .rpc_call_done = nfs4_lock_done,
5349 .rpc_release = nfs4_lock_release,
5350};
5351
2bee72a6
TM		 5352static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5353{
2bee72a6
TM		 5354 switch (error) {
5355 case -NFS4ERR_ADMIN_REVOKED:
5356 case -NFS4ERR_BAD_STATEID:
ecac799a 5357 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5358 if (new_lock_owner != 0 ||
795a88c9 5359 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5360 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5361 break;
5362 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5363 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5364 case -NFS4ERR_EXPIRED:
5365 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5366 };
5367}
5368
afe6c27c 5369static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5370{
5371 struct nfs4_lockdata *data;
5372 struct rpc_task *task;
5138fde0
TM		 5373 struct rpc_message msg = {
5374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5375 .rpc_cred = state->owner->so_cred,
5376 };
c970aa85
TM		 5377 struct rpc_task_setup task_setup_data = {
5378 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5379 .rpc_message = &msg,
c970aa85 5380 .callback_ops = &nfs4_lock_ops,
101070ca 5381 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5382 .flags = RPC_TASK_ASYNC,
5383 };
a5d16a4d
TM		 5384 int ret;
5385
3110ff80 5386 dprintk("%s: begin!\n", __func__);
cd3758e3 5387 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5388 fl->fl_u.nfs4_fl.owner,
5389 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5390 if (data == NULL)
5391 return -ENOMEM;
5392 if (IS_SETLKW(cmd))
5393 data->arg.block = 1;
a9c92d6b 5394 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5395 msg.rpc_argp = &data->arg;
5396 msg.rpc_resp = &data->res;
c970aa85 5397 task_setup_data.callback_data = data;
8fe72bac
TM		 5398 if (recovery_type > NFS_LOCK_NEW) {
5399 if (recovery_type == NFS_LOCK_RECLAIM)
5400 data->arg.reclaim = NFS_LOCK_RECLAIM;
5401 nfs4_set_sequence_privileged(&data->arg.seq_args);
5402 }
c970aa85 5403 task = rpc_run_task(&task_setup_data);
7a1218a2 5404 if (IS_ERR(task))
a5d16a4d 5405 return PTR_ERR(task);
a5d16a4d
TM		 5406 ret = nfs4_wait_for_completion_rpc_task(task);
5407 if (ret == 0) {
5408 ret = data->rpc_status;
2bee72a6
TM		 5409 if (ret)
5410 nfs4_handle_setlk_error(data->server, data->lsp,
5411 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5412 } else
5413 data->cancelled = 1;
e6b3c4db 5414 rpc_put_task(task);
3110ff80 5415 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5416 return ret;
1da177e4
LT		 5417}
5418
5419static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5420{
202b50dc 5421 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5422 struct nfs4_exception exception = {
5423 .inode = state->inode,
5424 };
202b50dc
TM		 5425 int err;
5426
5427 do {
42a2d13e
TM		 5428 /* Cache the lock if possible... */
5429 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5430 return 0;
afe6c27c 5431 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5432 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5433 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5434 break;
5435 nfs4_handle_exception(server, err, &exception);
5436 } while (exception.retry);
5437 return err;
1da177e4
LT		 5438}
5439
5440static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5441{
202b50dc 5442 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5443 struct nfs4_exception exception = {
5444 .inode = state->inode,
5445 };
202b50dc
TM		 5446 int err;
5447
6bfc93ef
TM		 5448 err = nfs4_set_lock_state(state, request);
5449 if (err != 0)
5450 return err;
202b50dc 5451 do {
42a2d13e
TM		 5452 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5453 return 0;
afe6c27c 5454 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5455 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5456 switch (err) {
5457 default:
5458 goto out;
5459 case -NFS4ERR_GRACE:
5460 case -NFS4ERR_DELAY:
5461 nfs4_handle_exception(server, err, &exception);
5462 err = 0;
5463 }
202b50dc 5464 } while (exception.retry);
a9ed2e25 5465out:
202b50dc 5466 return err;
1da177e4
LT		 5467}
5468
f062eb6c 5469#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5470/**
5471 * nfs41_check_expired_locks - possibly free a lock stateid
5472 *
5473 * @state: NFSv4 state for an inode
5474 *
5475 * Returns NFS_OK if recovery for this stateid is now finished.
5476 * Otherwise a negative NFS4ERR value is returned.
5477 */
b01dd1d8 5478static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5479{
eb64cf96 5480 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5481 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5482 struct nfs_server *server = NFS_SERVER(state->inode);
5483
b01dd1d8 5484 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5485 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5486 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5487
5488 status = nfs41_test_stateid(server,
5489 &lsp->ls_stateid,
5490 cred);
08cb47fa 5491 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5492 if (status != NFS_OK) {
3e60ffdd
CL		 5493 /* Free the stateid unless the server
5494 * informs us the stateid is unrecognized. */
89af2739
CL		 5495 if (status != -NFS4ERR_BAD_STATEID)
5496 nfs41_free_stateid(server,
ab7cb0df
TM		 5497 &lsp->ls_stateid,
5498 cred);
795a88c9 5499 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5500 ret = status;
5501 }
5502 }
5503 };
5504
5505 return ret;
5506}
5507
5508static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5509{
5510 int status = NFS_OK;
5511
5512 if (test_bit(LK_STATE_IN_USE, &state->flags))
5513 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5514 if (status != NFS_OK)
5515 status = nfs4_lock_expired(state, request);
5516 return status;
f062eb6c
BS		 5517}
5518#endif
5519
1da177e4
LT		 5520static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5521{
9a99af49 5522 struct nfs4_state_owner *sp = state->owner;
19e03c57 5523 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5524 unsigned char fl_flags = request->fl_flags;
9a99af49 5525 unsigned int seq;
8e469ebd 5526 int status = -ENOLCK;
1da177e4 5527
8e469ebd
TM		 5528 if ((fl_flags & FL_POSIX) &&
5529 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5530 goto out;
6bfc93ef 5531 /* Is this a delegated open? */
6bfc93ef
TM		 5532 status = nfs4_set_lock_state(state, request);
5533 if (status != 0)
5534 goto out;
01c3b861
TM		 5535 request->fl_flags |= FL_ACCESS;
5536 status = do_vfs_lock(request->fl_file, request);
5537 if (status < 0)
5538 goto out;
19e03c57 5539 down_read(&nfsi->rwsem);
01c3b861 5540 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5541 /* Yes: cache locks! */
01c3b861 5542 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5543 request->fl_flags = fl_flags & ~FL_SLEEP;
5544 status = do_vfs_lock(request->fl_file, request);
5545 goto out_unlock;
01c3b861 5546 }
9a99af49
TM		 5547 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5548 up_read(&nfsi->rwsem);
afe6c27c 5549 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5550 if (status != 0)
9a99af49
TM		 5551 goto out;
5552 down_read(&nfsi->rwsem);
5553 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5554 status = -NFS4ERR_DELAY;
01c3b861 5555 goto out_unlock;
9a99af49 5556 }
6bfc93ef 5557 /* Note: we always want to sleep here! */
01c3b861 5558 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5559 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5560 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5561 "manager!\n", __func__);
01c3b861 5562out_unlock:
19e03c57 5563 up_read(&nfsi->rwsem);
01c3b861
TM		 5564out:
5565 request->fl_flags = fl_flags;
1da177e4
LT		 5566 return status;
5567}
5568
5569static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5570{
a1d0b5ee
TM		 5571 struct nfs4_exception exception = {
5572 .state = state,
05ffe24f 5573 .inode = state->inode,
a1d0b5ee 5574 };
1da177e4
LT		 5575 int err;
5576
5577 do {
965b5d67 5578 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5579 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5580 if (err == -NFS4ERR_DENIED)
5581 err = -EAGAIN;
1da177e4 5582 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5583 err, &exception);
1da177e4
LT		 5584 } while (exception.retry);
5585 return err;
5586}
5587
5588static int
5589nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5590{
5591 struct nfs_open_context *ctx;
5592 struct nfs4_state *state;
5593 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5594 int status;
5595
5596 /* verify open state */
cd3758e3 5597 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5598 state = ctx->state;
5599
5600 if (request->fl_start < 0 || request->fl_end < 0)
5601 return -EINVAL;
5602
d953126a
TM		 5603 if (IS_GETLK(cmd)) {
5604 if (state != NULL)
5605 return nfs4_proc_getlk(state, F_GETLK, request);
5606 return 0;
5607 }
1da177e4
LT		 5608
5609 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5610 return -EINVAL;
5611
d953126a
TM		 5612 if (request->fl_type == F_UNLCK) {
5613 if (state != NULL)
5614 return nfs4_proc_unlck(state, cmd, request);
5615 return 0;
5616 }
1da177e4 5617
d953126a
TM		 5618 if (state == NULL)
5619 return -ENOLCK;
55725513
TM		 5620 /*
5621 * Don't rely on the VFS having checked the file open mode,
5622 * since it won't do this for flock() locks.
5623 */
f44106e2 5624 switch (request->fl_type) {
55725513
TM		 5625 case F_RDLCK:
5626 if (!(filp->f_mode & FMODE_READ))
5627 return -EBADF;
5628 break;
5629 case F_WRLCK:
5630 if (!(filp->f_mode & FMODE_WRITE))
5631 return -EBADF;
5632 }
5633
1da177e4
LT		 5634 do {
5635 status = nfs4_proc_setlk(state, cmd, request);
5636 if ((status != -EAGAIN) || IS_SETLK(cmd))
5637 break;
5638 timeout = nfs4_set_lock_task_retry(timeout);
5639 status = -ERESTARTSYS;
5640 if (signalled())
5641 break;
5642 } while(status < 0);
1da177e4
LT		 5643 return status;
5644}
5645
db4f2e63 5646int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5647{
5648 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5649 int err;
5650
5651 err = nfs4_set_lock_state(state, fl);
5652 if (err != 0)
db4f2e63 5653 return err;
4a706fa0 5654 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5655 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5656}
6b3b5496 5657
cf470c3e
TM		 5658struct nfs_release_lockowner_data {
5659 struct nfs4_lock_state *lsp;
5ae67c4f 5660 struct nfs_server *server;
cf470c3e
TM		 5661 struct nfs_release_lockowner_args args;
5662};
5663
d3c7b7cc
TM		 5664static void nfs4_release_lockowner_release(void *calldata)
5665{
cf470c3e 5666 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5667 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5668 kfree(calldata);
5669}
5670
17280175 5671static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5672 .rpc_release = nfs4_release_lockowner_release,
5673};
5674
c8b2d0bf 5675static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5676{
cf470c3e 5677 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5678 struct rpc_message msg = {
5679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5680 };
5681
5682 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5683 return -EINVAL;
5684 data = kmalloc(sizeof(*data), GFP_NOFS);
5685 if (!data)
5686 return -ENOMEM;
5687 data->lsp = lsp;
5ae67c4f 5688 data->server = server;
cf470c3e
TM		 5689 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5690 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5691 data->args.lock_owner.s_dev = server->s_dev;
5692 msg.rpc_argp = &data->args;
5693 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5694 return 0;
d3c7b7cc
TM		 5695}
5696
aa1870af
BF		 5697#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5698
64c2ce8b
AK		 5699static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5700 const void *buf, size_t buflen,
5701 int flags, int type)
6b3b5496 5702{
64c2ce8b
AK		 5703 if (strcmp(key, "") != 0)
5704 return -EINVAL;
4b580ee3 5705
64c2ce8b 5706 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5707}
5708
64c2ce8b
AK		 5709static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5710 void *buf, size_t buflen, int type)
6b3b5496 5711{
64c2ce8b
AK		 5712 if (strcmp(key, "") != 0)
5713 return -EINVAL;
aa1870af 5714
64c2ce8b 5715 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5716}
5717
64c2ce8b
AK		 5718static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5719 size_t list_len, const char *name,
5720 size_t name_len, int type)
6b3b5496 5721{
64c2ce8b 5722 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5723
096455a2
BF		 5724 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5725 return 0;
64c2ce8b
AK		 5726
5727 if (list && len <= list_len)
5728 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5729 return len;
6b3b5496
BF		 5730}
5731
c9bccef6
DQ		 5732#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5733static inline int nfs4_server_supports_labels(struct nfs_server *server)
5734{
5735 return server->caps & NFS_CAP_SECURITY_LABEL;
5736}
5737
5738static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5739 const void *buf, size_t buflen,
5740 int flags, int type)
5741{
5742 if (security_ismaclabel(key))
5743 return nfs4_set_security_label(dentry, buf, buflen);
5744
5745 return -EOPNOTSUPP;
5746}
5747
5748static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5749 void *buf, size_t buflen, int type)
5750{
5751 if (security_ismaclabel(key))
5752 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5753 return -EOPNOTSUPP;
5754}
5755
5756static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5757 size_t list_len, const char *name,
5758 size_t name_len, int type)
5759{
5760 size_t len = 0;
5761
5762 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5763 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5764 if (list && len <= list_len)
5765 security_inode_listsecurity(dentry->d_inode, list, len);
5766 }
5767 return len;
5768}
5769
5770static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5771 .prefix = XATTR_SECURITY_PREFIX,
5772 .list = nfs4_xattr_list_nfs4_label,
5773 .get = nfs4_xattr_get_nfs4_label,
5774 .set = nfs4_xattr_set_nfs4_label,
5775};
5776#endif
5777
5778
533eb461
AA		 5779/*
5780 * nfs_fhget will use either the mounted_on_fileid or the fileid
5781 */
69aaaae1
TM		 5782static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5783{
533eb461
AA		 5784 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5785 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5786 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5787 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5788 return;
5789
5790 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5791 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5792 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5793 fattr->nlink = 2;
5794}
5795
f05d147f
BS		 5796static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5797 const struct qstr *name,
5798 struct nfs4_fs_locations *fs_locations,
5799 struct page *page)
683b57b4
TM		 5800{
5801 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5802 u32 bitmask[3] = {
361e624f 5803 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5804 };
5805 struct nfs4_fs_locations_arg args = {
5806 .dir_fh = NFS_FH(dir),
c228fd3a 5807 .name = name,
683b57b4
TM		 5808 .page = page,
5809 .bitmask = bitmask,
5810 };
22958463
BH		 5811 struct nfs4_fs_locations_res res = {
5812 .fs_locations = fs_locations,
5813 };
683b57b4
TM		 5814 struct rpc_message msg = {
5815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5816 .rpc_argp = &args,
22958463 5817 .rpc_resp = &res,
683b57b4
TM		 5818 };
5819 int status;
5820
3110ff80 5821 dprintk("%s: start\n", __func__);
533eb461
AA		 5822
5823 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5824 * is not supported */
5825 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5826 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5827 else
5828 bitmask[0] |= FATTR4_WORD0_FILEID;
5829
c228fd3a 5830 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5831 fs_locations->server = server;
830b8e33 5832 fs_locations->nlocations = 0;
f05d147f 5833 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5834 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5835 return status;
5836}
5837
f05d147f
BS		 5838int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5839 const struct qstr *name,
5840 struct nfs4_fs_locations *fs_locations,
5841 struct page *page)
db0a9593
BS		 5842{
5843 struct nfs4_exception exception = { };
5844 int err;
5845 do {
078ea3df
TM		 5846 err = _nfs4_proc_fs_locations(client, dir, name,
5847 fs_locations, page);
5848 trace_nfs4_get_fs_locations(dir, name, err);
5849 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5850 &exception);
5851 } while (exception.retry);
5852 return err;
5853}
5854
5ec16a85 5855/**
a5250def
WAA		 5856 * If 'use_integrity' is true and the state managment nfs_client
5857 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5858 * and the machine credential as per RFC3530bis and RFC5661 Security
5859 * Considerations sections. Otherwise, just use the user cred with the
5860 * filesystem's rpc_client.
5ec16a85 5861 */
a5250def 5862static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5863{
5864 int status;
5865 struct nfs4_secinfo_arg args = {
5866 .dir_fh = NFS_FH(dir),
5867 .name = name,
5868 };
5869 struct nfs4_secinfo_res res = {
5870 .flavors = flavors,
5871 };
5872 struct rpc_message msg = {
5873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5874 .rpc_argp = &args,
5875 .rpc_resp = &res,
5876 };
a5250def
WAA		 5877 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
5878
5879 if (use_integrity) {
5880 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5881 msg.rpc_cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
5882 }
5a5ea0d4
BS		 5883
5884 dprintk("NFS call secinfo %s\n", name->name);
a5250def
WAA		 5885 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
5886 &res.seq_res, 0);
5a5ea0d4 5887 dprintk("NFS reply secinfo: %d\n", status);
a5250def
WAA		 5888
5889 if (msg.rpc_cred)
5890 put_rpccred(msg.rpc_cred);
5891
5a5ea0d4
BS		 5892 return status;
5893}
5894
72de53ec
BS		 5895int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5896 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5897{
5898 struct nfs4_exception exception = { };
5899 int err;
5900 do {
a5250def
WAA		 5901 err = -NFS4ERR_WRONGSEC;
5902
5903 /* try to use integrity protection with machine cred */
5904 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
5905 err = _nfs4_proc_secinfo(dir, name, flavors, true);
5906
5907 /*
5908 * if unable to use integrity protection, or SECINFO with
5909 * integrity protection returns NFS4ERR_WRONGSEC (which is
5910 * disallowed by spec, but exists in deployed servers) use
5911 * the current filesystem's rpc_client and the user cred.
5912 */
5913 if (err == -NFS4ERR_WRONGSEC)
5914 err = _nfs4_proc_secinfo(dir, name, flavors, false);
5915
078ea3df
TM		 5916 trace_nfs4_secinfo(dir, name, err);
5917 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5918 &exception);
5919 } while (exception.retry);
5920 return err;
5921}
5922
557134a3 5923#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5924/*
5925 * Check the exchange flags returned by the server for invalid flags, having
5926 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5927 * DS flags set.
5928 */
5929static int nfs4_check_cl_exchange_flags(u32 flags)
5930{
5931 if (flags & ~EXCHGID4_FLAG_MASK_R)
5932 goto out_inval;
5933 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5934 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5935 goto out_inval;
5936 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5937 goto out_inval;
5938 return NFS_OK;
5939out_inval:
5940 return -NFS4ERR_INVAL;
5941}
5942
78fe0f41 5943static bool
79d4e1f0
CL		 5944nfs41_same_server_scope(struct nfs41_server_scope *a,
5945 struct nfs41_server_scope *b)
78fe0f41
WAA		 5946{
5947 if (a->server_scope_sz == b->server_scope_sz &&
5948 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5949 return true;
5950
5951 return false;
5952}
5953
7c44f1ae
WAA		 5954/*
5955 * nfs4_proc_bind_conn_to_session()
5956 *
5957 * The 4.1 client currently uses the same TCP connection for the
5958 * fore and backchannel.
5959 */
2cf047c9 5960int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5961{
5962 int status;
5963 struct nfs41_bind_conn_to_session_res res;
5964 struct rpc_message msg = {
5965 .rpc_proc =
5966 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5967 .rpc_argp = clp,
5968 .rpc_resp = &res,
2cf047c9 5969 .rpc_cred = cred,
7c44f1ae
WAA		 5970 };
5971
5972 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5973
5974 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5975 if (unlikely(res.session == NULL)) {
5976 status = -ENOMEM;
5977 goto out;
5978 }
5979
5980 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5981 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5982 if (status == 0) {
5983 if (memcmp(res.session->sess_id.data,
5984 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5985 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5986 status = -EIO;
5987 goto out_session;
5988 }
5989 if (res.dir != NFS4_CDFS4_BOTH) {
5990 dprintk("NFS: %s: Unexpected direction from server\n",
5991 __func__);
5992 status = -EIO;
5993 goto out_session;
5994 }
5995 if (res.use_conn_in_rdma_mode) {
5996 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5997 __func__);
5998 status = -EIO;
5999 goto out_session;
6000 }
6001 }
6002out_session:
6003 kfree(res.session);
6004out:
6005 dprintk("<-- %s status= %d\n", __func__, status);
6006 return status;
6007}
6008
99fe60d0
BH		 6009/*
6010 * nfs4_proc_exchange_id()
6011 *
6bbb4ae8
CL		 6012 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6013 *
99fe60d0
BH		 6014 * Since the clientid has expired, all compounds using sessions
6015 * associated with the stale clientid will be returning
6016 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6017 * be in some phase of session reset.
6018 */
4d643d1d 6019int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 6020{
6021 nfs4_verifier verifier;
6022 struct nfs41_exchange_id_args args = {
cd93710e 6023 .verifier = &verifier,
99fe60d0 6024 .client = clp,
4f0b429d
TM		 6025 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6026 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6027 };
6028 struct nfs41_exchange_id_res res = {
32b01310 6029 0
99fe60d0
BH		 6030 };
6031 int status;
6032 struct rpc_message msg = {
6033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6034 .rpc_argp = &args,
6035 .rpc_resp = &res,
6036 .rpc_cred = cred,
6037 };
99fe60d0 6038
f092075d 6039 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6040 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6041 sizeof(args.id));
6bbb4ae8
CL		 6042 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6043 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6044 args.id_len, args.id);
99fe60d0 6045
acdeb69d 6046 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6047 GFP_NOFS);
acdeb69d 6048 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6049 status = -ENOMEM;
6050 goto out;
6051 }
78fe0f41 6052
79d4e1f0 6053 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6054 GFP_NOFS);
177313f1 6055 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6056 status = -ENOMEM;
acdeb69d 6057 goto out_server_owner;
abe9a6d5 6058 }
78fe0f41 6059
bbafffd2 6060 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6061 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6062 status = -ENOMEM;
6063 goto out_server_scope;
6064 }
6065
1bd714f2 6066 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6067 trace_nfs4_exchange_id(clp, status);
177313f1 6068 if (status == 0)
32b01310 6069 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6070
acdeb69d 6071 if (status == 0) {
32b01310
TM		 6072 clp->cl_clientid = res.clientid;
6073 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6074 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6075 clp->cl_seqid = res.seqid;
6076
acdeb69d
CL		 6077 kfree(clp->cl_serverowner);
6078 clp->cl_serverowner = res.server_owner;
6079 res.server_owner = NULL;
78fe0f41 6080
7d2ed9ac 6081 /* use the most recent implementation id */
59155546
CL		 6082 kfree(clp->cl_implid);
6083 clp->cl_implid = res.impl_id;
7d2ed9ac 6084
177313f1 6085 if (clp->cl_serverscope != NULL &&
79d4e1f0 6086 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6087 res.server_scope)) {
6088 dprintk("%s: server_scope mismatch detected\n",
6089 __func__);
6090 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6091 kfree(clp->cl_serverscope);
6092 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6093 }
6094
177313f1 6095 if (clp->cl_serverscope == NULL) {
79d4e1f0 6096 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6097 goto out;
6098 }
32b01310
TM		 6099 } else
6100 kfree(res.impl_id);
7d2ed9ac 6101
acdeb69d
CL		 6102out_server_owner:
6103 kfree(res.server_owner);
7d2ed9ac 6104out_server_scope:
abe9a6d5
WAA		 6105 kfree(res.server_scope);
6106out:
177313f1 6107 if (clp->cl_implid != NULL)
6bbb4ae8 6108 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6109 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6110 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6111 clp->cl_implid->date.seconds,
6112 clp->cl_implid->date.nseconds);
6bbb4ae8 6113 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6114 return status;
6115}
6116
66245539
TM		 6117static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6118 struct rpc_cred *cred)
6119{
6120 struct rpc_message msg = {
6121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6122 .rpc_argp = clp,
6123 .rpc_cred = cred,
6124 };
6125 int status;
6126
6127 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6128 trace_nfs4_destroy_clientid(clp, status);
66245539 6129 if (status)
02c67525 6130 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6131 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6132 return status;
6133}
6134
6135static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6136 struct rpc_cred *cred)
6137{
6138 unsigned int loop;
6139 int ret;
6140
6141 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6142 ret = _nfs4_proc_destroy_clientid(clp, cred);
6143 switch (ret) {
6144 case -NFS4ERR_DELAY:
6145 case -NFS4ERR_CLIENTID_BUSY:
6146 ssleep(1);
6147 break;
6148 default:
6149 return ret;
6150 }
6151 }
6152 return 0;
6153}
6154
6155int nfs4_destroy_clientid(struct nfs_client *clp)
6156{
6157 struct rpc_cred *cred;
6158 int ret = 0;
6159
6160 if (clp->cl_mvops->minor_version < 1)
6161 goto out;
6162 if (clp->cl_exchange_flags == 0)
6163 goto out;
05f4c350
CL		 6164 if (clp->cl_preserve_clid)
6165 goto out;
73d8bde5 6166 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6167 ret = nfs4_proc_destroy_clientid(clp, cred);
6168 if (cred)
6169 put_rpccred(cred);
6170 switch (ret) {
6171 case 0:
6172 case -NFS4ERR_STALE_CLIENTID:
6173 clp->cl_exchange_flags = 0;
6174 }
6175out:
6176 return ret;
6177}
6178
2050f0cc
AA		 6179struct nfs4_get_lease_time_data {
6180 struct nfs4_get_lease_time_args *args;
6181 struct nfs4_get_lease_time_res *res;
6182 struct nfs_client *clp;
6183};
6184
6185static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6186 void *calldata)
6187{
2050f0cc
AA		 6188 struct nfs4_get_lease_time_data *data =
6189 (struct nfs4_get_lease_time_data *)calldata;
6190
6191 dprintk("--> %s\n", __func__);
6192 /* just setup sequence, do not trigger session recovery
6193 since we're invoked within one */
d9afbd1b
TM		 6194 nfs41_setup_sequence(data->clp->cl_session,
6195 &data->args->la_seq_args,
6196 &data->res->lr_seq_res,
6197 task);
2050f0cc
AA		 6198 dprintk("<-- %s\n", __func__);
6199}
6200
6201/*
6202 * Called from nfs4_state_manager thread for session setup, so don't recover
6203 * from sequence operation or clientid errors.
6204 */
6205static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6206{
6207 struct nfs4_get_lease_time_data *data =
6208 (struct nfs4_get_lease_time_data *)calldata;
6209
6210 dprintk("--> %s\n", __func__);
14516c3a
TM		 6211 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6212 return;
2050f0cc
AA		 6213 switch (task->tk_status) {
6214 case -NFS4ERR_DELAY:
6215 case -NFS4ERR_GRACE:
6216 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6217 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6218 task->tk_status = 0;
a8a4ae3a
AA		 6219 /* fall through */
6220 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6221 rpc_restart_call_prepare(task);
2050f0cc
AA		 6222 return;
6223 }
2050f0cc
AA		 6224 dprintk("<-- %s\n", __func__);
6225}
6226
17280175 6227static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6228 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6229 .rpc_call_done = nfs4_get_lease_time_done,
6230};
6231
6232int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6233{
6234 struct rpc_task *task;
6235 struct nfs4_get_lease_time_args args;
6236 struct nfs4_get_lease_time_res res = {
6237 .lr_fsinfo = fsinfo,
6238 };
6239 struct nfs4_get_lease_time_data data = {
6240 .args = &args,
6241 .res = &res,
6242 .clp = clp,
6243 };
6244 struct rpc_message msg = {
6245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6246 .rpc_argp = &args,
6247 .rpc_resp = &res,
6248 };
6249 struct rpc_task_setup task_setup = {
6250 .rpc_client = clp->cl_rpcclient,
6251 .rpc_message = &msg,
6252 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6253 .callback_data = &data,
6254 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6255 };
6256 int status;
6257
a9c92d6b 6258 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6259 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6260 dprintk("--> %s\n", __func__);
6261 task = rpc_run_task(&task_setup);
6262
6263 if (IS_ERR(task))
6264 status = PTR_ERR(task);
6265 else {
6266 status = task->tk_status;
6267 rpc_put_task(task);
6268 }
6269 dprintk("<-- %s return %d\n", __func__, status);
6270
6271 return status;
6272}
6273
fc931582
AA		 6274/*
6275 * Initialize the values to be used by the client in CREATE_SESSION
6276 * If nfs4_init_session set the fore channel request and response sizes,
6277 * use them.
6278 *
6279 * Set the back channel max_resp_sz_cached to zero to force the client to
6280 * always set csa_cachethis to FALSE because the current implementation
6281 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6282 */
6283static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6284{
18aad3d5
AA		 6285 unsigned int max_rqst_sz, max_resp_sz;
6286
6287 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6288 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6289
fc931582 6290 /* Fore channel attributes */
18aad3d5
AA		 6291 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6292 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6293 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6294 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6295
6296 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6297 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6298 __func__,
6299 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6300 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6301
6302 /* Back channel attributes */
fc931582
AA		 6303 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6304 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6305 args->bc_attrs.max_resp_sz_cached = 0;
6306 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6307 args->bc_attrs.max_reqs = 1;
6308
6309 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6310 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6311 __func__,
6312 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6313 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6314 args->bc_attrs.max_reqs);
6315}
6316
43c2e885 6317static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6318{
43c2e885
BF		 6319 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6320 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6321
43c2e885
BF		 6322 if (rcvd->max_resp_sz > sent->max_resp_sz)
6323 return -EINVAL;
6324 /*
6325 * Our requested max_ops is the minimum we need; we're not
6326 * prepared to break up compounds into smaller pieces than that.
6327 * So, no point even trying to continue if the server won't
6328 * cooperate:
6329 */
6330 if (rcvd->max_ops < sent->max_ops)
6331 return -EINVAL;
6332 if (rcvd->max_reqs == 0)
6333 return -EINVAL;
b4b9a0c1
VG		 6334 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6335 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6336 return 0;
8d35301d
AA		 6337}
6338
43c2e885
BF		 6339static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6340{
6341 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6342 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6343
43c2e885
BF		 6344 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6345 return -EINVAL;
6346 if (rcvd->max_resp_sz < sent->max_resp_sz)
6347 return -EINVAL;
6348 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6349 return -EINVAL;
6350 /* These would render the backchannel useless: */
b4b9a0c1 6351 if (rcvd->max_ops != sent->max_ops)
43c2e885 6352 return -EINVAL;
b4b9a0c1 6353 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6354 return -EINVAL;
6355 return 0;
6356}
8d35301d 6357
8d35301d
AA		 6358static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6359 struct nfs4_session *session)
6360{
43c2e885 6361 int ret;
8d35301d 6362
43c2e885
BF		 6363 ret = nfs4_verify_fore_channel_attrs(args, session);
6364 if (ret)
6365 return ret;
6366 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6367}
6368
848f5bda
TM		 6369static int _nfs4_proc_create_session(struct nfs_client *clp,
6370 struct rpc_cred *cred)
fc931582
AA		 6371{
6372 struct nfs4_session *session = clp->cl_session;
6373 struct nfs41_create_session_args args = {
6374 .client = clp,
6375 .cb_program = NFS4_CALLBACK,
6376 };
6377 struct nfs41_create_session_res res = {
6378 .client = clp,
6379 };
6380 struct rpc_message msg = {
6381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6382 .rpc_argp = &args,
6383 .rpc_resp = &res,
848f5bda 6384 .rpc_cred = cred,
fc931582
AA		 6385 };
6386 int status;
6387
6388 nfs4_init_channel_attrs(&args);
0f91421e 6389 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6390
1bd714f2 6391 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6392 trace_nfs4_create_session(clp, status);
fc931582 6393
43095d39 6394 if (!status) {
8d35301d
AA		 6395 /* Verify the session's negotiated channel_attrs values */
6396 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6397 /* Increment the clientid slot sequence id */
6398 clp->cl_seqid++;
6399 }
6400
6401 return status;
6402}
6403
6404/*
6405 * Issues a CREATE_SESSION operation to the server.
6406 * It is the responsibility of the caller to verify the session is
6407 * expired before calling this routine.
6408 */
848f5bda 6409int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6410{
6411 int status;
6412 unsigned *ptr;
fc931582
AA		 6413 struct nfs4_session *session = clp->cl_session;
6414
6415 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6416
848f5bda 6417 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6418 if (status)
6419 goto out;
6420
aacd5537
AA		 6421 /* Init or reset the session slot tables */
6422 status = nfs4_setup_session_slot_tables(session);
6423 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6424 if (status)
6425 goto out;
6426
6427 ptr = (unsigned *)&session->sess_id.data[0];
6428 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6429 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6430out:
6431 dprintk("<-- %s\n", __func__);
6432 return status;
6433}
6434
0f3e66c6
AA		 6435/*
6436 * Issue the over-the-wire RPC DESTROY_SESSION.
6437 * The caller must serialize access to this routine.
6438 */
848f5bda
TM		 6439int nfs4_proc_destroy_session(struct nfs4_session *session,
6440 struct rpc_cred *cred)
0f3e66c6 6441{
848f5bda
TM		 6442 struct rpc_message msg = {
6443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6444 .rpc_argp = session,
6445 .rpc_cred = cred,
6446 };
0f3e66c6 6447 int status = 0;
0f3e66c6
AA		 6448
6449 dprintk("--> nfs4_proc_destroy_session\n");
6450
6451 /* session is still being setup */
6452 if (session->clp->cl_cons_state != NFS_CS_READY)
6453 return status;
6454
1bd714f2 6455 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6456 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6457
6458 if (status)
08106ac7 6459 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6460 "Session has been destroyed regardless...\n", status);
6461
6462 dprintk("<-- nfs4_proc_destroy_session\n");
6463 return status;
6464}
6465
fc01cea9
AA		 6466/*
6467 * Renew the cl_session lease.
6468 */
d5f8d3fe
TM		 6469struct nfs4_sequence_data {
6470 struct nfs_client *clp;
6471 struct nfs4_sequence_args args;
6472 struct nfs4_sequence_res res;
6473};
6474
dc96aef9
AB		 6475static void nfs41_sequence_release(void *data)
6476{
d5f8d3fe
TM		 6477 struct nfs4_sequence_data *calldata = data;
6478 struct nfs_client *clp = calldata->clp;
dc96aef9 6479
7135840f
AB		 6480 if (atomic_read(&clp->cl_count) > 1)
6481 nfs4_schedule_state_renewal(clp);
6482 nfs_put_client(clp);
d5f8d3fe 6483 kfree(calldata);
dc96aef9
AB		 6484}
6485
aa5190d0
TM		 6486static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6487{
6488 switch(task->tk_status) {
6489 case -NFS4ERR_DELAY:
aa5190d0
TM		 6490 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6491 return -EAGAIN;
6492 default:
0400a6b0 6493 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6494 }
6495 return 0;
6496}
6497
dc96aef9 6498static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6499{
d5f8d3fe
TM		 6500 struct nfs4_sequence_data *calldata = data;
6501 struct nfs_client *clp = calldata->clp;
fc01cea9 6502
14516c3a
TM		 6503 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6504 return;
fc01cea9 6505
c6d01c6f 6506 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6507 if (task->tk_status < 0) {
6508 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6509 if (atomic_read(&clp->cl_count) == 1)
6510 goto out;
fc01cea9 6511
aa5190d0
TM		 6512 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6513 rpc_restart_call_prepare(task);
fc01cea9
AA		 6514 return;
6515 }
6516 }
fc01cea9 6517 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6518out:
fc01cea9
AA		 6519 dprintk("<-- %s\n", __func__);
6520}
6521
6522static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6523{
d5f8d3fe
TM		 6524 struct nfs4_sequence_data *calldata = data;
6525 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6526 struct nfs4_sequence_args *args;
6527 struct nfs4_sequence_res *res;
6528
fc01cea9
AA		 6529 args = task->tk_msg.rpc_argp;
6530 res = task->tk_msg.rpc_resp;
6531
d9afbd1b 6532 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6533}
6534
6535static const struct rpc_call_ops nfs41_sequence_ops = {
6536 .rpc_call_done = nfs41_sequence_call_done,
6537 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6538 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6539};
6540
8fe72bac
TM		 6541static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6542 struct rpc_cred *cred,
6543 bool is_privileged)
fc01cea9 6544{
d5f8d3fe 6545 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6546 struct rpc_message msg = {
6547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6548 .rpc_cred = cred,
6549 };
71ac6da9
TM		 6550 struct rpc_task_setup task_setup_data = {
6551 .rpc_client = clp->cl_rpcclient,
6552 .rpc_message = &msg,
8fe72bac 6553 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6554 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6555 };
fc01cea9 6556
7135840f 6557 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6558 return ERR_PTR(-EIO);
dfb4f309 6559 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6560 if (calldata == NULL) {
7135840f 6561 nfs_put_client(clp);
71ac6da9 6562 return ERR_PTR(-ENOMEM);
fc01cea9 6563 }
a9c92d6b 6564 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6565 if (is_privileged)
6566 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6567 msg.rpc_argp = &calldata->args;
6568 msg.rpc_resp = &calldata->res;
6569 calldata->clp = clp;
71ac6da9 6570 task_setup_data.callback_data = calldata;
fc01cea9 6571
71ac6da9
TM		 6572 return rpc_run_task(&task_setup_data);
6573}
6574
2f60ea6b 6575static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6576{
6577 struct rpc_task *task;
6578 int ret = 0;
6579
2f60ea6b
TM		 6580 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6581 return 0;
8fe72bac 6582 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6583 if (IS_ERR(task))
6584 ret = PTR_ERR(task);
6585 else
bf294b41 6586 rpc_put_task_async(task);
71ac6da9
TM		 6587 dprintk("<-- %s status=%d\n", __func__, ret);
6588 return ret;
6589}
6590
6591static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6592{
6593 struct rpc_task *task;
6594 int ret;
6595
8fe72bac 6596 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6597 if (IS_ERR(task)) {
6598 ret = PTR_ERR(task);
6599 goto out;
6600 }
6601 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6602 if (!ret) {
6603 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6604
6605 if (task->tk_status == 0)
6606 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6607 ret = task->tk_status;
b4410c2f 6608 }
71ac6da9
TM		 6609 rpc_put_task(task);
6610out:
6611 dprintk("<-- %s status=%d\n", __func__, ret);
6612 return ret;
fc01cea9
AA		 6613}
6614
fce5c838
RL		 6615struct nfs4_reclaim_complete_data {
6616 struct nfs_client *clp;
6617 struct nfs41_reclaim_complete_args arg;
6618 struct nfs41_reclaim_complete_res res;
6619};
6620
6621static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6622{
6623 struct nfs4_reclaim_complete_data *calldata = data;
6624
d9afbd1b
TM		 6625 nfs41_setup_sequence(calldata->clp->cl_session,
6626 &calldata->arg.seq_args,
6627 &calldata->res.seq_res,
6628 task);
fce5c838
RL		 6629}
6630
aa5190d0
TM		 6631static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6632{
6633 switch(task->tk_status) {
6634 case 0:
6635 case -NFS4ERR_COMPLETE_ALREADY:
6636 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6637 break;
6638 case -NFS4ERR_DELAY:
aa5190d0 6639 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6640 /* fall through */
6641 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6642 return -EAGAIN;
6643 default:
0400a6b0 6644 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6645 }
6646 return 0;
6647}
6648
fce5c838
RL		 6649static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6650{
6651 struct nfs4_reclaim_complete_data *calldata = data;
6652 struct nfs_client *clp = calldata->clp;
6653 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6654
6655 dprintk("--> %s\n", __func__);
14516c3a
TM		 6656 if (!nfs41_sequence_done(task, res))
6657 return;
fce5c838 6658
c6d01c6f 6659 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6660 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6661 rpc_restart_call_prepare(task);
6662 return;
6663 }
fce5c838
RL		 6664 dprintk("<-- %s\n", __func__);
6665}
6666
6667static void nfs4_free_reclaim_complete_data(void *data)
6668{
6669 struct nfs4_reclaim_complete_data *calldata = data;
6670
6671 kfree(calldata);
6672}
6673
6674static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6675 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6676 .rpc_call_done = nfs4_reclaim_complete_done,
6677 .rpc_release = nfs4_free_reclaim_complete_data,
6678};
6679
6680/*
6681 * Issue a global reclaim complete.
6682 */
965e9c23
TM		 6683static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6684 struct rpc_cred *cred)
fce5c838
RL		 6685{
6686 struct nfs4_reclaim_complete_data *calldata;
6687 struct rpc_task *task;
6688 struct rpc_message msg = {
6689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6690 .rpc_cred = cred,
fce5c838
RL		 6691 };
6692 struct rpc_task_setup task_setup_data = {
6693 .rpc_client = clp->cl_rpcclient,
6694 .rpc_message = &msg,
6695 .callback_ops = &nfs4_reclaim_complete_call_ops,
6696 .flags = RPC_TASK_ASYNC,
6697 };
6698 int status = -ENOMEM;
6699
6700 dprintk("--> %s\n", __func__);
8535b2be 6701 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6702 if (calldata == NULL)
6703 goto out;
6704 calldata->clp = clp;
6705 calldata->arg.one_fs = 0;
fce5c838 6706
a9c92d6b 6707 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6708 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6709 msg.rpc_argp = &calldata->arg;
6710 msg.rpc_resp = &calldata->res;
6711 task_setup_data.callback_data = calldata;
6712 task = rpc_run_task(&task_setup_data);
acf82b85 6713 if (IS_ERR(task)) {
fce5c838 6714 status = PTR_ERR(task);
acf82b85
DC		 6715 goto out;
6716 }
c34c32ea
AA		 6717 status = nfs4_wait_for_completion_rpc_task(task);
6718 if (status == 0)
6719 status = task->tk_status;
fce5c838 6720 rpc_put_task(task);
acf82b85 6721 return 0;
fce5c838
RL		 6722out:
6723 dprintk("<-- %s status=%d\n", __func__, status);
6724 return status;
6725}
b1f69b75
AA		 6726
6727static void
6728nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6729{
6730 struct nfs4_layoutget *lgp = calldata;
c31663d4 6731 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6732 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6733
6734 dprintk("--> %s\n", __func__);
c31663d4
FI		 6735 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6736 * right now covering the LAYOUTGET we are about to send.
6737 * However, that is not so catastrophic, and there seems
6738 * to be no way to prevent it completely.
6739 */
6ba7db34 6740 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6741 &lgp->res.seq_res, task))
b1f69b75 6742 return;
cf7d63f1
FI		 6743 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6744 NFS_I(lgp->args.inode)->layout,
6745 lgp->args.ctx->state)) {
6746 rpc_exit(task, NFS4_OK);
cf7d63f1 6747 }
b1f69b75
AA		 6748}
6749
6750static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6751{
6752 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6753 struct inode *inode = lgp->args.inode;
6754 struct nfs_server *server = NFS_SERVER(inode);
6755 struct pnfs_layout_hdr *lo;
6756 struct nfs4_state *state = NULL;
30005121 6757 unsigned long timeo, giveup;
b1f69b75
AA		 6758
6759 dprintk("--> %s\n", __func__);
6760
6ba7db34 6761 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6762 goto out;
b1f69b75
AA		 6763
6764 switch (task->tk_status) {
6765 case 0:
ee314c2a 6766 goto out;
b1f69b75
AA		 6767 case -NFS4ERR_LAYOUTTRYLATER:
6768 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6769 timeo = rpc_get_timeout(task->tk_client);
6770 giveup = lgp->args.timestamp + timeo;
6771 if (time_after(giveup, jiffies))
6772 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6773 break;
6774 case -NFS4ERR_EXPIRED:
6775 case -NFS4ERR_BAD_STATEID:
6776 spin_lock(&inode->i_lock);
6777 lo = NFS_I(inode)->layout;
6778 if (!lo || list_empty(&lo->plh_segs)) {
6779 spin_unlock(&inode->i_lock);
6780 /* If the open stateid was bad, then recover it. */
6781 state = lgp->args.ctx->state;
6782 } else {
6783 LIST_HEAD(head);
6784
6785 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6786 spin_unlock(&inode->i_lock);
6787 /* Mark the bad layout state as invalid, then
6788 * retry using the open stateid. */
6789 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6790 }
6791 }
ee314c2a
TM		 6792 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6793 rpc_restart_call_prepare(task);
6794out:
b1f69b75
AA		 6795 dprintk("<-- %s\n", __func__);
6796}
6797
8554116e
IK		 6798static size_t max_response_pages(struct nfs_server *server)
6799{
6800 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6801 return nfs_page_array_len(0, max_resp_sz);
6802}
6803
6804static void nfs4_free_pages(struct page **pages, size_t size)
6805{
6806 int i;
6807
6808 if (!pages)
6809 return;
6810
6811 for (i = 0; i < size; i++) {
6812 if (!pages[i])
6813 break;
6814 __free_page(pages[i]);
6815 }
6816 kfree(pages);
6817}
6818
6819static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6820{
6821 struct page **pages;
6822 int i;
6823
6824 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6825 if (!pages) {
6826 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6827 return NULL;
6828 }
6829
6830 for (i = 0; i < size; i++) {
6831 pages[i] = alloc_page(gfp_flags);
6832 if (!pages[i]) {
6833 dprintk("%s: failed to allocate page\n", __func__);
6834 nfs4_free_pages(pages, size);
6835 return NULL;
6836 }
6837 }
6838
6839 return pages;
6840}
6841
b1f69b75
AA		 6842static void nfs4_layoutget_release(void *calldata)
6843{
6844 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6845 struct inode *inode = lgp->args.inode;
6846 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6847 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6848
6849 dprintk("--> %s\n", __func__);
8554116e 6850 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6851 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6852 put_nfs_open_context(lgp->args.ctx);
6853 kfree(calldata);
6854 dprintk("<-- %s\n", __func__);
6855}
6856
6857static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6858 .rpc_call_prepare = nfs4_layoutget_prepare,
6859 .rpc_call_done = nfs4_layoutget_done,
6860 .rpc_release = nfs4_layoutget_release,
6861};
6862
a0b0a6e3
TM		 6863struct pnfs_layout_segment *
6864nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6865{
a47970ff
WAA		 6866 struct inode *inode = lgp->args.inode;
6867 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6868 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6869 struct rpc_task *task;
6870 struct rpc_message msg = {
6871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6872 .rpc_argp = &lgp->args,
6873 .rpc_resp = &lgp->res,
6ab59344 6874 .rpc_cred = lgp->cred,
b1f69b75
AA		 6875 };
6876 struct rpc_task_setup task_setup_data = {
6877 .rpc_client = server->client,
6878 .rpc_message = &msg,
6879 .callback_ops = &nfs4_layoutget_call_ops,
6880 .callback_data = lgp,
6881 .flags = RPC_TASK_ASYNC,
6882 };
a0b0a6e3 6883 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6884 int status = 0;
6885
6886 dprintk("--> %s\n", __func__);
6887
8554116e
IK		 6888 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6889 if (!lgp->args.layout.pages) {
6890 nfs4_layoutget_release(lgp);
a0b0a6e3 6891 return ERR_PTR(-ENOMEM);
8554116e
IK		 6892 }
6893 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6894 lgp->args.timestamp = jiffies;
8554116e 6895
35124a09 6896 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6897 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 6898 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6899
6900 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6901 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6902
b1f69b75
AA		 6903 task = rpc_run_task(&task_setup_data);
6904 if (IS_ERR(task))
a0b0a6e3 6905 return ERR_CAST(task);
b1f69b75 6906 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6907 if (status == 0)
6908 status = task->tk_status;
1037e6ea
TM		 6909 trace_nfs4_layoutget(lgp->args.ctx,
6910 &lgp->args.range,
6911 &lgp->res.range,
6912 status);
085b7a45
WAA		 6913 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6914 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6915 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6916 rpc_put_task(task);
6917 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6918 if (status)
6919 return ERR_PTR(status);
6920 return lseg;
b1f69b75
AA		 6921}
6922
cbe82603
BH		 6923static void
6924nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6925{
6926 struct nfs4_layoutreturn *lrp = calldata;
6927
6928 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6929 nfs41_setup_sequence(lrp->clp->cl_session,
6930 &lrp->args.seq_args,
6931 &lrp->res.seq_res,
6932 task);
cbe82603
BH		 6933}
6934
6935static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6936{
6937 struct nfs4_layoutreturn *lrp = calldata;
6938 struct nfs_server *server;
6939
6940 dprintk("--> %s\n", __func__);
6941
6ba7db34 6942 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6943 return;
6944
6945 server = NFS_SERVER(lrp->args.inode);
6946 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6947 rpc_restart_call_prepare(task);
cbe82603
BH		 6948 return;
6949 }
cbe82603
BH		 6950 dprintk("<-- %s\n", __func__);
6951}
6952
6953static void nfs4_layoutreturn_release(void *calldata)
6954{
6955 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6956 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6957
6958 dprintk("--> %s\n", __func__);
849b286f
TM		 6959 spin_lock(&lo->plh_inode->i_lock);
6960 if (lrp->res.lrs_present)
6961 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6962 lo->plh_block_lgets--;
6963 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6964 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6965 kfree(calldata);
6966 dprintk("<-- %s\n", __func__);
6967}
6968
6969static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6970 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6971 .rpc_call_done = nfs4_layoutreturn_done,
6972 .rpc_release = nfs4_layoutreturn_release,
6973};
6974
6975int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6976{
6977 struct rpc_task *task;
6978 struct rpc_message msg = {
6979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6980 .rpc_argp = &lrp->args,
6981 .rpc_resp = &lrp->res,
9556000d 6982 .rpc_cred = lrp->cred,
cbe82603
BH		 6983 };
6984 struct rpc_task_setup task_setup_data = {
1771c577 6985 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6986 .rpc_message = &msg,
6987 .callback_ops = &nfs4_layoutreturn_call_ops,
6988 .callback_data = lrp,
6989 };
6990 int status;
6991
6992 dprintk("--> %s\n", __func__);
a9c92d6b 6993 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6994 task = rpc_run_task(&task_setup_data);
6995 if (IS_ERR(task))
6996 return PTR_ERR(task);
6997 status = task->tk_status;
1037e6ea 6998 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 6999 dprintk("<-- %s status=%d\n", __func__, status);
7000 rpc_put_task(task);
7001 return status;
7002}
7003
7f11d8d3
AA		 7004/*
7005 * Retrieve the list of Data Server devices from the MDS.
7006 */
7007static int _nfs4_getdevicelist(struct nfs_server *server,
7008 const struct nfs_fh *fh,
7009 struct pnfs_devicelist *devlist)
7010{
7011 struct nfs4_getdevicelist_args args = {
7012 .fh = fh,
7013 .layoutclass = server->pnfs_curr_ld->id,
7014 };
7015 struct nfs4_getdevicelist_res res = {
7016 .devlist = devlist,
7017 };
7018 struct rpc_message msg = {
7019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7020 .rpc_argp = &args,
7021 .rpc_resp = &res,
7022 };
7023 int status;
7024
7025 dprintk("--> %s\n", __func__);
7026 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7027 &res.seq_res, 0);
7028 dprintk("<-- %s status=%d\n", __func__, status);
7029 return status;
7030}
7031
7032int nfs4_proc_getdevicelist(struct nfs_server *server,
7033 const struct nfs_fh *fh,
7034 struct pnfs_devicelist *devlist)
7035{
7036 struct nfs4_exception exception = { };
7037 int err;
7038
7039 do {
7040 err = nfs4_handle_exception(server,
7041 _nfs4_getdevicelist(server, fh, devlist),
7042 &exception);
7043 } while (exception.retry);
7044
7045 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7046 err, devlist->num_devs);
7047
7048 return err;
7049}
7050EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7051
b1f69b75 7052static int
cd5875fe
TM		 7053_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7054 struct pnfs_device *pdev,
7055 struct rpc_cred *cred)
b1f69b75
AA		 7056{
7057 struct nfs4_getdeviceinfo_args args = {
7058 .pdev = pdev,
7059 };
7060 struct nfs4_getdeviceinfo_res res = {
7061 .pdev = pdev,
7062 };
7063 struct rpc_message msg = {
7064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7065 .rpc_argp = &args,
7066 .rpc_resp = &res,
cd5875fe 7067 .rpc_cred = cred,
b1f69b75
AA		 7068 };
7069 int status;
7070
7071 dprintk("--> %s\n", __func__);
7c513058 7072 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7073 dprintk("<-- %s status=%d\n", __func__, status);
7074
7075 return status;
7076}
7077
cd5875fe
TM		 7078int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7079 struct pnfs_device *pdev,
7080 struct rpc_cred *cred)
b1f69b75
AA		 7081{
7082 struct nfs4_exception exception = { };
7083 int err;
7084
7085 do {
7086 err = nfs4_handle_exception(server,
cd5875fe 7087 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7088 &exception);
7089 } while (exception.retry);
7090 return err;
7091}
7092EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7093
863a3c6c
AA		 7094static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7095{
7096 struct nfs4_layoutcommit_data *data = calldata;
7097 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7098 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7099
d9afbd1b
TM		 7100 nfs41_setup_sequence(session,
7101 &data->args.seq_args,
7102 &data->res.seq_res,
7103 task);
863a3c6c
AA		 7104}
7105
7106static void
7107nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7108{
7109 struct nfs4_layoutcommit_data *data = calldata;
7110 struct nfs_server *server = NFS_SERVER(data->args.inode);
7111
6ba7db34 7112 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7113 return;
7114
7115 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7116 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7117 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7118 case -NFS4ERR_BADLAYOUT: /* no layout */
7119 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7120 task->tk_status = 0;
e59d27e0
TM		 7121 break;
7122 case 0:
863a3c6c
AA		 7123 nfs_post_op_update_inode_force_wcc(data->args.inode,
7124 data->res.fattr);
e59d27e0
TM		 7125 break;
7126 default:
7127 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7128 rpc_restart_call_prepare(task);
7129 return;
7130 }
7131 }
863a3c6c
AA		 7132}
7133
7134static void nfs4_layoutcommit_release(void *calldata)
7135{
7136 struct nfs4_layoutcommit_data *data = calldata;
7137
db29c089 7138 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7139 put_rpccred(data->cred);
7140 kfree(data);
7141}
7142
7143static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7144 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7145 .rpc_call_done = nfs4_layoutcommit_done,
7146 .rpc_release = nfs4_layoutcommit_release,
7147};
7148
7149int
ef311537 7150nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7151{
7152 struct rpc_message msg = {
7153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7154 .rpc_argp = &data->args,
7155 .rpc_resp = &data->res,
7156 .rpc_cred = data->cred,
7157 };
7158 struct rpc_task_setup task_setup_data = {
7159 .task = &data->task,
7160 .rpc_client = NFS_CLIENT(data->args.inode),
7161 .rpc_message = &msg,
7162 .callback_ops = &nfs4_layoutcommit_ops,
7163 .callback_data = data,
7164 .flags = RPC_TASK_ASYNC,
7165 };
7166 struct rpc_task *task;
7167 int status = 0;
7168
7169 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7170 "lbw: %llu inode %lu\n",
7171 data->task.tk_pid, sync,
7172 data->args.lastbytewritten,
7173 data->args.inode->i_ino);
7174
a9c92d6b 7175 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7176 task = rpc_run_task(&task_setup_data);
7177 if (IS_ERR(task))
7178 return PTR_ERR(task);
ef311537 7179 if (sync == false)
863a3c6c
AA		 7180 goto out;
7181 status = nfs4_wait_for_completion_rpc_task(task);
7182 if (status != 0)
7183 goto out;
7184 status = task->tk_status;
1037e6ea 7185 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7186out:
7187 dprintk("%s: status %d\n", __func__, status);
7188 rpc_put_task(task);
7189 return status;
7190}
fca78d6d 7191
97431204
AA		 7192/**
7193 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7194 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7195 */
fca78d6d
BS		 7196static int
7197_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7198 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7199{
7200 struct nfs41_secinfo_no_name_args args = {
7201 .style = SECINFO_STYLE_CURRENT_FH,
7202 };
7203 struct nfs4_secinfo_res res = {
7204 .flavors = flavors,
7205 };
7206 struct rpc_message msg = {
7207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7208 .rpc_argp = &args,
7209 .rpc_resp = &res,
7210 };
97431204
AA		 7211 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7212 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7213}
7214
7215static int
7216nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7217 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7218{
7219 struct nfs4_exception exception = { };
7220 int err;
7221 do {
7222 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7223 switch (err) {
7224 case 0:
7225 case -NFS4ERR_WRONGSEC:
7226 case -NFS4ERR_NOTSUPP:
05e9cfb4 7227 goto out;
fca78d6d
BS		 7228 default:
7229 err = nfs4_handle_exception(server, err, &exception);
7230 }
7231 } while (exception.retry);
05e9cfb4 7232out:
fca78d6d
BS		 7233 return err;
7234}
7235
7236static int
7237nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7238 struct nfs_fsinfo *info)
7239{
7240 int err;
7241 struct page *page;
7242 rpc_authflavor_t flavor;
7243 struct nfs4_secinfo_flavors *flavors;
7244
7245 page = alloc_page(GFP_KERNEL);
7246 if (!page) {
7247 err = -ENOMEM;
7248 goto out;
7249 }
7250
7251 flavors = page_address(page);
7252 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7253
7254 /*
7255 * Fall back on "guess and check" method if
7256 * the server doesn't support SECINFO_NO_NAME
7257 */
7258 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7259 err = nfs4_find_root_sec(server, fhandle, info);
7260 goto out_freepage;
7261 }
7262 if (err)
7263 goto out_freepage;
7264
7265 flavor = nfs_find_best_sec(flavors);
7266 if (err == 0)
7267 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7268
7269out_freepage:
7270 put_page(page);
7271 if (err == -EACCES)
7272 return -EPERM;
7273out:
7274 return err;
7275}
1cab0652 7276
ab7cb0df
TM		 7277static int _nfs41_test_stateid(struct nfs_server *server,
7278 nfs4_stateid *stateid,
7279 struct rpc_cred *cred)
7d974794
BS		 7280{
7281 int status;
7282 struct nfs41_test_stateid_args args = {
1cab0652 7283 .stateid = stateid,
7d974794
BS		 7284 };
7285 struct nfs41_test_stateid_res res;
7286 struct rpc_message msg = {
7287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7288 .rpc_argp = &args,
7289 .rpc_resp = &res,
ab7cb0df 7290 .rpc_cred = cred,
7d974794 7291 };
1cab0652 7292
38527b15 7293 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7294 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7295 nfs4_set_sequence_privileged(&args.seq_args);
7296 status = nfs4_call_sync_sequence(server->client, server, &msg,
7297 &args.seq_args, &res.seq_res);
38527b15
CL		 7298 if (status != NFS_OK) {
7299 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7300 return status;
38527b15
CL		 7301 }
7302 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7303 return -res.status;
7d974794
BS		 7304}
7305
38527b15
CL		 7306/**
7307 * nfs41_test_stateid - perform a TEST_STATEID operation
7308 *
7309 * @server: server / transport on which to perform the operation
7310 * @stateid: state ID to test
ab7cb0df 7311 * @cred: credential
38527b15
CL		 7312 *
7313 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7314 * Otherwise a negative NFS4ERR value is returned if the operation
7315 * failed or the state ID is not currently valid.
7316 */
ab7cb0df
TM		 7317static int nfs41_test_stateid(struct nfs_server *server,
7318 nfs4_stateid *stateid,
7319 struct rpc_cred *cred)
7d974794
BS		 7320{
7321 struct nfs4_exception exception = { };
7322 int err;
7323 do {
ab7cb0df 7324 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7325 if (err != -NFS4ERR_DELAY)
7326 break;
7327 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7328 } while (exception.retry);
7329 return err;
7330}
9aeda35f 7331
7c1d5fae
TM		 7332struct nfs_free_stateid_data {
7333 struct nfs_server *server;
7334 struct nfs41_free_stateid_args args;
9aeda35f 7335 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7336};
7337
7338static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7339{
7340 struct nfs_free_stateid_data *data = calldata;
7341 nfs41_setup_sequence(nfs4_get_session(data->server),
7342 &data->args.seq_args,
7343 &data->res.seq_res,
7344 task);
7345}
7346
7347static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7348{
7349 struct nfs_free_stateid_data *data = calldata;
7350
7351 nfs41_sequence_done(task, &data->res.seq_res);
7352
7353 switch (task->tk_status) {
7354 case -NFS4ERR_DELAY:
7355 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7356 rpc_restart_call_prepare(task);
7357 }
7358}
7359
7360static void nfs41_free_stateid_release(void *calldata)
7361{
7362 kfree(calldata);
7363}
7364
17f26b12 7365static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7366 .rpc_call_prepare = nfs41_free_stateid_prepare,
7367 .rpc_call_done = nfs41_free_stateid_done,
7368 .rpc_release = nfs41_free_stateid_release,
7369};
7370
7371static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7372 nfs4_stateid *stateid,
ab7cb0df 7373 struct rpc_cred *cred,
7c1d5fae
TM		 7374 bool privileged)
7375{
9aeda35f
BS		 7376 struct rpc_message msg = {
7377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7378 .rpc_cred = cred,
9aeda35f 7379 };
7c1d5fae
TM		 7380 struct rpc_task_setup task_setup = {
7381 .rpc_client = server->client,
7382 .rpc_message = &msg,
7383 .callback_ops = &nfs41_free_stateid_ops,
7384 .flags = RPC_TASK_ASYNC,
7385 };
7386 struct nfs_free_stateid_data *data;
9aeda35f 7387
38527b15 7388 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7389 data = kmalloc(sizeof(*data), GFP_NOFS);
7390 if (!data)
7391 return ERR_PTR(-ENOMEM);
7392 data->server = server;
7393 nfs4_stateid_copy(&data->args.stateid, stateid);
7394
7395 task_setup.callback_data = data;
7396
7397 msg.rpc_argp = &data->args;
7398 msg.rpc_resp = &data->res;
a9c92d6b 7399 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7400 if (privileged)
7401 nfs4_set_sequence_privileged(&data->args.seq_args);
7402
7403 return rpc_run_task(&task_setup);
9aeda35f
BS		 7404}
7405
38527b15
CL		 7406/**
7407 * nfs41_free_stateid - perform a FREE_STATEID operation
7408 *
7409 * @server: server / transport on which to perform the operation
7410 * @stateid: state ID to release
ab7cb0df 7411 * @cred: credential
38527b15
CL		 7412 *
7413 * Returns NFS_OK if the server freed "stateid". Otherwise a
7414 * negative NFS4ERR value is returned.
7415 */
ab7cb0df
TM		 7416static int nfs41_free_stateid(struct nfs_server *server,
7417 nfs4_stateid *stateid,
7418 struct rpc_cred *cred)
9aeda35f 7419{
7c1d5fae
TM		 7420 struct rpc_task *task;
7421 int ret;
7422
ab7cb0df 7423 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7424 if (IS_ERR(task))
7425 return PTR_ERR(task);
7426 ret = rpc_wait_for_completion_task(task);
7427 if (!ret)
7428 ret = task->tk_status;
7429 rpc_put_task(task);
7430 return ret;
9aeda35f 7431}
36281caa 7432
c8b2d0bf
TM		 7433static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7434{
7435 struct rpc_task *task;
ab7cb0df 7436 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7437
ab7cb0df 7438 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7439 nfs4_free_lock_state(server, lsp);
7440 if (IS_ERR(task))
7441 return PTR_ERR(task);
7442 rpc_put_task(task);
7443 return 0;
7444}
7445
36281caa
TM		 7446static bool nfs41_match_stateid(const nfs4_stateid *s1,
7447 const nfs4_stateid *s2)
7448{
2d2f24ad 7449 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7450 return false;
7451
2d2f24ad 7452 if (s1->seqid == s2->seqid)
36281caa 7453 return true;
2d2f24ad 7454 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7455 return true;
7456
7457 return false;
7458}
7459
557134a3
AA		 7460#endif /* CONFIG_NFS_V4_1 */
7461
36281caa
TM		 7462static bool nfs4_match_stateid(const nfs4_stateid *s1,
7463 const nfs4_stateid *s2)
7464{
f597c537 7465 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7466}
7467
7468
17280175 7469static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7470 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7471 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7472 .recover_open = nfs4_open_reclaim,
7473 .recover_lock = nfs4_lock_reclaim,
591d71cb 7474 .establish_clid = nfs4_init_clientid,
05f4c350 7475 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7476};
7477
591d71cb 7478#if defined(CONFIG_NFS_V4_1)
17280175 7479static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7480 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7481 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7482 .recover_open = nfs4_open_reclaim,
7483 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7484 .establish_clid = nfs41_init_clientid,
fce5c838 7485 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7486 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7487};
7488#endif /* CONFIG_NFS_V4_1 */
7489
17280175 7490static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7491 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7492 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7493 .recover_open = nfs4_open_expired,
7494 .recover_lock = nfs4_lock_expired,
7495 .establish_clid = nfs4_init_clientid,
7496};
7497
7498#if defined(CONFIG_NFS_V4_1)
17280175 7499static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7500 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7501 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7502 .recover_open = nfs41_open_expired,
7503 .recover_lock = nfs41_lock_expired,
4d643d1d 7504 .establish_clid = nfs41_init_clientid,
1da177e4 7505};
591d71cb 7506#endif /* CONFIG_NFS_V4_1 */
1da177e4 7507
17280175 7508static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7509 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7510 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7511 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7512};
7513
7514#if defined(CONFIG_NFS_V4_1)
17280175 7515static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7516 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7517 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7518 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7519};
7520#endif
7521
97dc1359
TM		 7522static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7523 .minor_version = 0,
39c6daae
TM		 7524 .init_caps = NFS_CAP_READDIRPLUS
7525 | NFS_CAP_ATOMIC_OPEN
7526 | NFS_CAP_CHANGE_ATTR
7527 | NFS_CAP_POSIX_LOCK,
97dc1359 7528 .call_sync = _nfs4_call_sync,
36281caa 7529 .match_stateid = nfs4_match_stateid,
fca78d6d 7530 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7531 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7532 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7533 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7534 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7535};
7536
7537#if defined(CONFIG_NFS_V4_1)
7538static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7539 .minor_version = 1,
39c6daae
TM		 7540 .init_caps = NFS_CAP_READDIRPLUS
7541 | NFS_CAP_ATOMIC_OPEN
7542 | NFS_CAP_CHANGE_ATTR
3b66486c 7543 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7544 | NFS_CAP_STATEID_NFSV41
7545 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7546 .call_sync = nfs4_call_sync_sequence,
36281caa 7547 .match_stateid = nfs41_match_stateid,
fca78d6d 7548 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7549 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7550 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7551 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7552 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7553};
7554#endif
7555
42c2c424
SD		 7556#if defined(CONFIG_NFS_V4_2)
7557static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7558 .minor_version = 2,
7017310a
BS		 7559 .init_caps = NFS_CAP_READDIRPLUS
7560 | NFS_CAP_ATOMIC_OPEN
7561 | NFS_CAP_CHANGE_ATTR
7562 | NFS_CAP_POSIX_LOCK
7563 | NFS_CAP_STATEID_NFSV41
7564 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7565 .call_sync = nfs4_call_sync_sequence,
7566 .match_stateid = nfs41_match_stateid,
7567 .find_root_sec = nfs41_find_root_sec,
7017310a 7568 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7569 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7570 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7571 .state_renewal_ops = &nfs41_state_renewal_ops,
7572};
7573#endif
7574
97dc1359
TM		 7575const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7576 [0] = &nfs_v4_0_minor_ops,
7577#if defined(CONFIG_NFS_V4_1)
7578 [1] = &nfs_v4_1_minor_ops,
7579#endif
42c2c424
SD		 7580#if defined(CONFIG_NFS_V4_2)
7581 [2] = &nfs_v4_2_minor_ops,
7582#endif
97dc1359
TM		 7583};
7584
17f26b12 7585static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7586 .create = nfs_create,
7587 .lookup = nfs_lookup,
7588 .atomic_open = nfs_atomic_open,
7589 .link = nfs_link,
7590 .unlink = nfs_unlink,
7591 .symlink = nfs_symlink,
7592 .mkdir = nfs_mkdir,
7593 .rmdir = nfs_rmdir,
7594 .mknod = nfs_mknod,
7595 .rename = nfs_rename,
7596 .permission = nfs_permission,
7597 .getattr = nfs_getattr,
7598 .setattr = nfs_setattr,
7599 .getxattr = generic_getxattr,
7600 .setxattr = generic_setxattr,
7601 .listxattr = generic_listxattr,
7602 .removexattr = generic_removexattr,
7603};
7604
92e1d5be 7605static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7606 .permission = nfs_permission,
7607 .getattr = nfs_getattr,
7608 .setattr = nfs_setattr,
64c2ce8b
AK		 7609 .getxattr = generic_getxattr,
7610 .setxattr = generic_setxattr,
7611 .listxattr = generic_listxattr,
7612 .removexattr = generic_removexattr,
6b3b5496
BF		 7613};
7614
509de811 7615const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7616 .version = 4, /* protocol version */
7617 .dentry_ops = &nfs4_dentry_operations,
7618 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7619 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7620 .file_ops = &nfs4_file_operations,
1da177e4 7621 .getroot = nfs4_proc_get_root,
281cad46 7622 .submount = nfs4_submount,
ff9099f2 7623 .try_mount = nfs4_try_mount,
1da177e4
LT		 7624 .getattr = nfs4_proc_getattr,
7625 .setattr = nfs4_proc_setattr,
7626 .lookup = nfs4_proc_lookup,
7627 .access = nfs4_proc_access,
7628 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7629 .create = nfs4_proc_create,
7630 .remove = nfs4_proc_remove,
7631 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7632 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7633 .unlink_done = nfs4_proc_unlink_done,
7634 .rename = nfs4_proc_rename,
d3d4152a 7635 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7636 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7637 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7638 .link = nfs4_proc_link,
7639 .symlink = nfs4_proc_symlink,
7640 .mkdir = nfs4_proc_mkdir,
7641 .rmdir = nfs4_proc_remove,
7642 .readdir = nfs4_proc_readdir,
7643 .mknod = nfs4_proc_mknod,
7644 .statfs = nfs4_proc_statfs,
7645 .fsinfo = nfs4_proc_fsinfo,
7646 .pathconf = nfs4_proc_pathconf,
e9326dca 7647 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7648 .decode_dirent = nfs4_decode_dirent,
7649 .read_setup = nfs4_proc_read_setup,
1abb5088 7650 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7651 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7652 .read_done = nfs4_read_done,
1da177e4 7653 .write_setup = nfs4_proc_write_setup,
57208fa7 7654 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7655 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7656 .write_done = nfs4_write_done,
1da177e4 7657 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7658 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7659 .commit_done = nfs4_commit_done,
1da177e4 7660 .lock = nfs4_proc_lock,
e50a1c2e 7661 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7662 .close_context = nfs4_close_context,
2b484297 7663 .open_context = nfs4_atomic_open,
011e2a7f 7664 .have_delegation = nfs4_have_delegation,
57ec14c5 7665 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7666 .alloc_client = nfs4_alloc_client,
45a52a02 7667 .init_client = nfs4_init_client,
cdb7eced 7668 .free_client = nfs4_free_client,
1179acc6
BS		 7669 .create_server = nfs4_create_server,
7670 .clone_server = nfs_clone_server,
1da177e4
LT		 7671};
7672
64c2ce8b
AK		 7673static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7674 .prefix = XATTR_NAME_NFSV4_ACL,
7675 .list = nfs4_xattr_list_nfs4_acl,
7676 .get = nfs4_xattr_get_nfs4_acl,
7677 .set = nfs4_xattr_set_nfs4_acl,
7678};
7679
7680const struct xattr_handler *nfs4_xattr_handlers[] = {
7681 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7682#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7683 &nfs4_xattr_nfs4_label_handler,
7684#endif
64c2ce8b
AK		 7685 NULL
7686};
7687
1da177e4
LT		 7688/*
7689 * Local variables:
7690 * c-basic-offset: 8
7691 * End:
7692 */
Linux 6.x block layer and io_uring tree(s)