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NFSv4: Don't try to recover NFSv4 locks when they are lost.
[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
3bd2384a
CL		 487static int nfs40_setup_sequence(const struct nfs_server *server,
488 struct nfs4_sequence_args *args,
489 struct nfs4_sequence_res *res,
490 struct rpc_task *task)
491{
492 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
493 struct nfs4_slot *slot;
494
495 /* slot already allocated? */
496 if (res->sr_slot != NULL)
497 goto out_start;
498
499 spin_lock(&tbl->slot_tbl_lock);
500 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
501 goto out_sleep;
502
503 slot = nfs4_alloc_slot(tbl);
504 if (IS_ERR(slot)) {
505 if (slot == ERR_PTR(-ENOMEM))
506 task->tk_timeout = HZ >> 2;
507 goto out_sleep;
508 }
509 spin_unlock(&tbl->slot_tbl_lock);
510
511 args->sa_slot = slot;
512 res->sr_slot = slot;
513
514out_start:
515 rpc_call_start(task);
516 return 0;
517
518out_sleep:
519 if (args->sa_privileged)
520 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
521 NULL, RPC_PRIORITY_PRIVILEGED);
522 else
523 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
524 spin_unlock(&tbl->slot_tbl_lock);
525 return -EAGAIN;
526}
527
528static int nfs40_sequence_done(struct rpc_task *task,
529 struct nfs4_sequence_res *res)
530{
531 struct nfs4_slot *slot = res->sr_slot;
532 struct nfs4_slot_table *tbl;
533
534 if (!RPC_WAS_SENT(task))
535 goto out;
536
537 tbl = slot->table;
538 spin_lock(&tbl->slot_tbl_lock);
539 if (!nfs41_wake_and_assign_slot(tbl, slot))
540 nfs4_free_slot(tbl, slot);
541 spin_unlock(&tbl->slot_tbl_lock);
542
543 res->sr_slot = NULL;
544out:
545 return 1;
546}
547
cccef3b9
AA		 548#if defined(CONFIG_NFS_V4_1)
549
d185a334 550static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 551{
e3725ec0 552 struct nfs4_session *session;
13615871 553 struct nfs4_slot_table *tbl;
c10e4498 554 bool send_new_highest_used_slotid = false;
13615871 555
dfb4f309 556 if (!res->sr_slot) {
13615871
AA		 557 /* just wake up the next guy waiting since
558 * we may have not consumed a slot after all */
691daf3b 559 dprintk("%s: No slot\n", __func__);
35dc1d74 560 return;
13615871 561 }
e3725ec0
TM		 562 tbl = res->sr_slot->table;
563 session = tbl->session;
ea028ac9 564
35dc1d74 565 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 566 /* Be nice to the server: try to ensure that the last transmitted
567 * value for highest_user_slotid <= target_highest_slotid
568 */
569 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
570 send_new_highest_used_slotid = true;
571
b75ad4cd
TM		 572 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
573 send_new_highest_used_slotid = false;
574 goto out_unlock;
575 }
f4af6e2a 576 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 577
578 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
579 send_new_highest_used_slotid = false;
b75ad4cd 580out_unlock:
35dc1d74 581 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 582 res->sr_slot = NULL;
c10e4498
TM		 583 if (send_new_highest_used_slotid)
584 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 585}
586
14516c3a 587static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 588{
e3725ec0 589 struct nfs4_session *session;
933602e3 590 struct nfs4_slot *slot;
14516c3a 591 struct nfs_client *clp;
ac20d163 592 bool interrupted = false;
85563073 593 int ret = 1;
b0df806c 594
468f8613
BS		 595 /* don't increment the sequence number if the task wasn't sent */
596 if (!RPC_WAS_SENT(task))
b0df806c
AA		 597 goto out;
598
933602e3 599 slot = res->sr_slot;
e3725ec0 600 session = slot->table->session;
933602e3 601
ac20d163
TM		 602 if (slot->interrupted) {
603 slot->interrupted = 0;
604 interrupted = true;
605 }
606
2f92ae34 607 trace_nfs4_sequence_done(session, res);
691daf3b 608 /* Check the SEQUENCE operation status */
14516c3a
TM		 609 switch (res->sr_status) {
610 case 0:
b0df806c 611 /* Update the slot's sequence and clientid lease timer */
933602e3 612 ++slot->seq_nr;
e3725ec0 613 clp = session->clp;
8e63b6a8 614 do_renew_lease(clp, res->sr_timestamp);
0629e370 615 /* Check sequence flags */
b4410c2f
TM		 616 if (res->sr_status_flags != 0)
617 nfs4_schedule_lease_recovery(clp);
464ee9f9 618 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 619 break;
ac20d163
TM		 620 case 1:
621 /*
622 * sr_status remains 1 if an RPC level error occurred.
623 * The server may or may not have processed the sequence
624 * operation..
625 * Mark the slot as having hosted an interrupted RPC call.
626 */
627 slot->interrupted = 1;
628 goto out;
14516c3a
TM		 629 case -NFS4ERR_DELAY:
630 /* The server detected a resend of the RPC call and
631 * returned NFS4ERR_DELAY as per Section 2.10.6.2
632 * of RFC5661.
633 */
df2fabff 634 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 635 __func__,
df2fabff 636 slot->slot_nr,
933602e3 637 slot->seq_nr);
14516c3a 638 goto out_retry;
85563073
TM		 639 case -NFS4ERR_BADSLOT:
640 /*
641 * The slot id we used was probably retired. Try again
642 * using a different slot id.
643 */
e8794440
TM		 644 goto retry_nowait;
645 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 646 /*
647 * Was the last operation on this sequence interrupted?
648 * If so, retry after bumping the sequence number.
649 */
650 if (interrupted) {
651 ++slot->seq_nr;
652 goto retry_nowait;
653 }
e8794440
TM		 654 /*
655 * Could this slot have been previously retired?
656 * If so, then the server may be expecting seq_nr = 1!
657 */
8e63b6a8
TM		 658 if (slot->seq_nr != 1) {
659 slot->seq_nr = 1;
660 goto retry_nowait;
661 }
662 break;
e8794440
TM		 663 case -NFS4ERR_SEQ_FALSE_RETRY:
664 ++slot->seq_nr;
665 goto retry_nowait;
14516c3a
TM		 666 default:
667 /* Just update the slot sequence no. */
933602e3 668 ++slot->seq_nr;
b0df806c
AA		 669 }
670out:
671 /* The session may be reset by one of the error handlers. */
672 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 673 nfs41_sequence_free_slot(res);
85563073 674 return ret;
e8794440
TM		 675retry_nowait:
676 if (rpc_restart_call_prepare(task)) {
677 task->tk_status = 0;
678 ret = 0;
679 }
680 goto out;
14516c3a 681out_retry:
d05dd4e9 682 if (!rpc_restart_call(task))
14516c3a
TM		 683 goto out;
684 rpc_delay(task, NFS4_POLL_RETRY_MAX);
685 return 0;
b0df806c
AA		 686}
687
14516c3a
TM		 688static int nfs4_sequence_done(struct rpc_task *task,
689 struct nfs4_sequence_res *res)
df896455 690{
e3725ec0 691 if (res->sr_slot == NULL)
14516c3a 692 return 1;
3bd2384a
CL		 693 if (!res->sr_slot->table->session)
694 return nfs40_sequence_done(task, res);
14516c3a 695 return nfs41_sequence_done(task, res);
df896455
TM		 696}
697
dc70d7b3 698int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 699 struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res,
ce5039c1
AA		 701 struct rpc_task *task)
702{
fbcd4abc
AA		 703 struct nfs4_slot *slot;
704 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 705
706 dprintk("--> %s\n", __func__);
ce5039c1 707 /* slot already allocated? */
dfb4f309 708 if (res->sr_slot != NULL)
d9afbd1b 709 goto out_success;
ce5039c1 710
fbcd4abc
AA		 711 tbl = &session->fc_slot_table;
712
69d206b5
TM		 713 task->tk_timeout = 0;
714
fbcd4abc 715 spin_lock(&tbl->slot_tbl_lock);
774d5f14 716 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 717 !args->sa_privileged) {
0b1c8fc4 718 /* The state manager will wait until the slot table is empty */
0b1c8fc4 719 dprintk("%s session is draining\n", __func__);
7b939a3f 720 goto out_sleep;
689cf5c1
AB		 721 }
722
2dc03b7f 723 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 724 if (IS_ERR(slot)) {
725 /* If out of memory, try again in 1/4 second */
726 if (slot == ERR_PTR(-ENOMEM))
727 task->tk_timeout = HZ >> 2;
fbcd4abc 728 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 729 goto out_sleep;
fbcd4abc
AA		 730 }
731 spin_unlock(&tbl->slot_tbl_lock);
732
2b2fa717 733 args->sa_slot = slot;
fbcd4abc 734
e8d92382 735 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 736 slot->slot_nr, slot->seq_nr);
fbcd4abc 737
dfb4f309 738 res->sr_slot = slot;
8e63b6a8 739 res->sr_timestamp = jiffies;
2a6e26cd 740 res->sr_status_flags = 0;
fbcd4abc
AA		 741 /*
742 * sr_status is only set in decode_sequence, and so will remain
743 * set to 1 if an rpc level failure occurs.
744 */
745 res->sr_status = 1;
2f92ae34 746 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 747out_success:
748 rpc_call_start(task);
ce5039c1 749 return 0;
7b939a3f 750out_sleep:
8fe72bac
TM		 751 /* Privileged tasks are queued with top priority */
752 if (args->sa_privileged)
1e1093c7
TM		 753 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
754 NULL, RPC_PRIORITY_PRIVILEGED);
755 else
756 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 757 spin_unlock(&tbl->slot_tbl_lock);
758 return -EAGAIN;
ce5039c1 759}
dc70d7b3 760EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 761
5a580e0a
CL		 762static int nfs4_setup_sequence(const struct nfs_server *server,
763 struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res,
765 struct rpc_task *task)
ce5039c1 766{
035168ab 767 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 768 int ret = 0;
769
3bd2384a
CL		 770 if (!session)
771 return nfs40_setup_sequence(server, args, res, task);
035168ab 772
e8d92382 773 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 774 __func__, session->clp, session, res->sr_slot ?
e8d92382 775 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 776
9d12b216 777 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 778
ce5039c1
AA		 779 dprintk("<-- %s status=%d\n", __func__, ret);
780 return ret;
781}
782
ce5039c1
AA		 783static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
784{
2a3eb2b9 785 struct nfs4_call_sync_data *data = calldata;
6ba7db34 786 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 787
035168ab
TM		 788 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
789
d9afbd1b 790 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 791}
792
69ab40c4
AA		 793static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
794{
2a3eb2b9 795 struct nfs4_call_sync_data *data = calldata;
69ab40c4 796
14516c3a 797 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 798}
799
17280175 800static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 801 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 802 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 803};
804
3bd2384a
CL		 805#else /* !CONFIG_NFS_V4_1 */
806
9915ea7e
CL		 807static int nfs4_setup_sequence(const struct nfs_server *server,
808 struct nfs4_sequence_args *args,
809 struct nfs4_sequence_res *res,
810 struct rpc_task *task)
811{
3bd2384a 812 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 813}
814
815static int nfs4_sequence_done(struct rpc_task *task,
816 struct nfs4_sequence_res *res)
817{
3bd2384a 818 return nfs40_sequence_done(task, res);
9915ea7e 819}
3bd2384a
CL		 820
821#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 822
823static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
824{
825 struct nfs4_call_sync_data *data = calldata;
826 nfs4_setup_sequence(data->seq_server,
827 data->seq_args, data->seq_res, task);
828}
829
830static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
831{
832 struct nfs4_call_sync_data *data = calldata;
833 nfs4_sequence_done(task, data->seq_res);
834}
835
836static const struct rpc_call_ops nfs40_call_sync_ops = {
837 .rpc_call_prepare = nfs40_call_sync_prepare,
838 .rpc_call_done = nfs40_call_sync_done,
839};
840
7c513058
BS		 841static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
842 struct nfs_server *server,
ce5039c1
AA		 843 struct rpc_message *msg,
844 struct nfs4_sequence_args *args,
8fe72bac 845 struct nfs4_sequence_res *res)
ce5039c1
AA		 846{
847 int ret;
848 struct rpc_task *task;
9915ea7e 849 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 850 struct nfs4_call_sync_data data = {
035168ab 851 .seq_server = server,
ce5039c1
AA		 852 .seq_args = args,
853 .seq_res = res,
ce5039c1
AA		 854 };
855 struct rpc_task_setup task_setup = {
7c513058 856 .rpc_client = clnt,
ce5039c1 857 .rpc_message = msg,
9915ea7e 858 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 859 .callback_data = &data
860 };
861
ce5039c1
AA		 862 task = rpc_run_task(&task_setup);
863 if (IS_ERR(task))
864 ret = PTR_ERR(task);
865 else {
866 ret = task->tk_status;
867 rpc_put_task(task);
868 }
869 return ret;
870}
871
fd0c0953 872static
7c513058
BS		 873int nfs4_call_sync(struct rpc_clnt *clnt,
874 struct nfs_server *server,
e73b83f2
BS		 875 struct rpc_message *msg,
876 struct nfs4_sequence_args *args,
877 struct nfs4_sequence_res *res,
878 int cache_reply)
879{
a9c92d6b 880 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 881 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 882}
cccef3b9 883
38478b24 884static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 885{
38478b24 886 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 887
38478b24 888 spin_lock(&dir->i_lock);
359d7d1c 889 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 890 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 891 nfs_force_lookup_revalidate(dir);
a9a4a87a 892 dir->i_version = cinfo->after;
de242c0b 893 nfs_fscache_invalidate(dir);
38478b24 894 spin_unlock(&dir->i_lock);
1da177e4
LT		 895}
896
e56e0b78 897struct nfs4_opendata {
c6d00e63 898 struct kref kref;
e56e0b78
TM		 899 struct nfs_openargs o_arg;
900 struct nfs_openres o_res;
cdd4e68b
TM		 901 struct nfs_open_confirmargs c_arg;
902 struct nfs_open_confirmres c_res;
6926afd1
TM		 903 struct nfs4_string owner_name;
904 struct nfs4_string group_name;
e56e0b78 905 struct nfs_fattr f_attr;
1775fd3e 906 struct nfs4_label *f_label;
e56e0b78 907 struct dentry *dir;
82a2c1b7 908 struct dentry *dentry;
e56e0b78 909 struct nfs4_state_owner *owner;
aac00a8d 910 struct nfs4_state *state;
e56e0b78 911 struct iattr attrs;
26e976a8 912 unsigned long timestamp;
3e309914 913 unsigned int rpc_done : 1;
bdeca1b7 914 unsigned int is_recover : 1;
24ac23ab
TM		 915 int rpc_status;
916 int cancelled;
e56e0b78
TM		 917};
918
49f9a0fa
TM		 919static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
920 int err, struct nfs4_exception *exception)
921{
922 if (err != -EINVAL)
923 return false;
924 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
925 return false;
926 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
927 exception->retry = 1;
928 return true;
929}
930
931static enum open_claim_type4
932nfs4_map_atomic_open_claim(struct nfs_server *server,
933 enum open_claim_type4 claim)
934{
935 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
936 return claim;
937 switch (claim) {
938 default:
939 return claim;
940 case NFS4_OPEN_CLAIM_FH:
941 return NFS4_OPEN_CLAIM_NULL;
942 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
943 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
944 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
945 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
946 }
947}
2ced46c2
TM		 948
949static void nfs4_init_opendata_res(struct nfs4_opendata *p)
950{
951 p->o_res.f_attr = &p->f_attr;
1775fd3e 952 p->o_res.f_label = p->f_label;
c1d51931
TM		 953 p->o_res.seqid = p->o_arg.seqid;
954 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 955 p->o_res.server = p->o_arg.server;
5f657530 956 p->o_res.access_request = p->o_arg.access;
2ced46c2 957 nfs_fattr_init(&p->f_attr);
6926afd1 958 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 959}
960
82a2c1b7 961static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 962 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 963 const struct iattr *attrs,
1775fd3e 964 struct nfs4_label *label,
4a1c0893 965 enum open_claim_type4 claim,
8535b2be 966 gfp_t gfp_mask)
e56e0b78 967{
82a2c1b7 968 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 969 struct inode *dir = parent->d_inode;
970 struct nfs_server *server = NFS_SERVER(dir);
971 struct nfs4_opendata *p;
972
8535b2be 973 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 974 if (p == NULL)
975 goto err;
14c43f76
DQ		 976
977 p->f_label = nfs4_label_alloc(server, gfp_mask);
978 if (IS_ERR(p->f_label))
979 goto err_free_p;
980
8535b2be 981 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 982 if (p->o_arg.seqid == NULL)
14c43f76 983 goto err_free_label;
82a2c1b7
AV		 984 nfs_sb_active(dentry->d_sb);
985 p->dentry = dget(dentry);
e56e0b78
TM		 986 p->dir = parent;
987 p->owner = sp;
988 atomic_inc(&sp->so_count);
dc0b027d
TM		 989 p->o_arg.open_flags = flags;
990 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 991 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
992 * will return permission denied for all bits until close */
993 if (!(flags & O_EXCL)) {
994 /* ask server to check for all possible rights as results
995 * are cached */
996 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
997 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 998 }
7539bbab 999 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1000 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1001 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1002 p->o_arg.name = &dentry->d_name;
e56e0b78 1003 p->o_arg.server = server;
aa9c2669 1004 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1005 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1006 p->o_arg.label = label;
49f9a0fa
TM		 1007 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1008 switch (p->o_arg.claim) {
4a1c0893
TM		 1009 case NFS4_OPEN_CLAIM_NULL:
1010 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1011 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1012 p->o_arg.fh = NFS_FH(dir);
1013 break;
1014 case NFS4_OPEN_CLAIM_PREVIOUS:
1015 case NFS4_OPEN_CLAIM_FH:
1016 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1017 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1018 p->o_arg.fh = NFS_FH(dentry->d_inode);
1019 }
536e43d1 1020 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1021 __u32 verf[2];
d77d76ff 1022
e56e0b78
TM		 1023 p->o_arg.u.attrs = &p->attrs;
1024 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1025
1026 verf[0] = jiffies;
1027 verf[1] = current->pid;
1028 memcpy(p->o_arg.u.verifier.data, verf,
1029 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1030 }
cdd4e68b
TM		 1031 p->c_arg.fh = &p->o_res.fh;
1032 p->c_arg.stateid = &p->o_res.stateid;
1033 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1034 nfs4_init_opendata_res(p);
c6d00e63 1035 kref_init(&p->kref);
e56e0b78 1036 return p;
14c43f76
DQ		 1037
1038err_free_label:
1039 nfs4_label_free(p->f_label);
1040err_free_p:
e56e0b78
TM		 1041 kfree(p);
1042err:
1043 dput(parent);
1044 return NULL;
1045}
1046
c6d00e63 1047static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1048{
c6d00e63
TM		 1049 struct nfs4_opendata *p = container_of(kref,
1050 struct nfs4_opendata, kref);
82a2c1b7 1051 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1052
1053 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1054 if (p->state != NULL)
1055 nfs4_put_open_state(p->state);
c6d00e63 1056 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1057
1058 nfs4_label_free(p->f_label);
1059
c6d00e63 1060 dput(p->dir);
82a2c1b7
AV		 1061 dput(p->dentry);
1062 nfs_sb_deactive(sb);
6926afd1 1063 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1064 kfree(p);
1065}
1066
1067static void nfs4_opendata_put(struct nfs4_opendata *p)
1068{
1069 if (p != NULL)
1070 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1071}
1072
06f814a3
TM		 1073static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1074{
06f814a3
TM		 1075 int ret;
1076
06f814a3 1077 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1078 return ret;
1079}
1080
dc0b027d 1081static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1082{
1083 int ret = 0;
dc0b027d 1084
536e43d1 1085 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1086 goto out;
1087 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1088 case FMODE_READ:
88069f77
TM		 1089 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1090 && state->n_rdonly != 0;
6ee41268
TM		 1091 break;
1092 case FMODE_WRITE:
88069f77
TM		 1093 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1094 && state->n_wronly != 0;
6ee41268
TM		 1095 break;
1096 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1097 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1098 && state->n_rdwr != 0;
6ee41268 1099 }
dc0b027d 1100out:
6ee41268
TM		 1101 return ret;
1102}
1103
dc0b027d 1104static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1105{
652f89f6
TM		 1106 if (delegation == NULL)
1107 return 0;
dc0b027d 1108 if ((delegation->type & fmode) != fmode)
aac00a8d 1109 return 0;
15c831bf 1110 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1111 return 0;
d25be546
TM		 1112 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1113 return 0;
b7391f44 1114 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1115 return 1;
1116}
1117
dc0b027d 1118static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1119{
dc0b027d 1120 switch (fmode) {
e7616923
TM		 1121 case FMODE_WRITE:
1122 state->n_wronly++;
1123 break;
1124 case FMODE_READ:
1125 state->n_rdonly++;
1126 break;
1127 case FMODE_READ|FMODE_WRITE:
1128 state->n_rdwr++;
1129 }
dc0b027d 1130 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1131}
1132
dc0b027d 1133static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1134{
1135 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1136 nfs4_stateid_copy(&state->stateid, stateid);
1137 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1138 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1139 switch (fmode) {
003707c7
TM		 1140 case FMODE_READ:
1141 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1142 break;
1143 case FMODE_WRITE:
1144 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1145 break;
1146 case FMODE_READ|FMODE_WRITE:
1147 set_bit(NFS_O_RDWR_STATE, &state->flags);
1148 }
e7616923
TM		 1149}
1150
dc0b027d 1151static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1152{
8bda4e4c 1153 write_seqlock(&state->seqlock);
dc0b027d 1154 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1155 write_sequnlock(&state->seqlock);
003707c7
TM		 1156}
1157
dc0b027d 1158static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1159{
8bda4e4c
TM		 1160 /*
1161 * Protect the call to nfs4_state_set_mode_locked and
1162 * serialise the stateid update
1163 */
1164 write_seqlock(&state->seqlock);
003707c7 1165 if (deleg_stateid != NULL) {
f597c537 1166 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1167 set_bit(NFS_DELEGATED_STATE, &state->flags);
1168 }
1169 if (open_stateid != NULL)
dc0b027d 1170 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1171 write_sequnlock(&state->seqlock);
1172 spin_lock(&state->owner->so_lock);
dc0b027d 1173 update_open_stateflags(state, fmode);
ec073428 1174 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1175}
1176
dc0b027d 1177static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1178{
1179 struct nfs_inode *nfsi = NFS_I(state->inode);
1180 struct nfs_delegation *deleg_cur;
1181 int ret = 0;
1182
dc0b027d 1183 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1184
1185 rcu_read_lock();
1186 deleg_cur = rcu_dereference(nfsi->delegation);
1187 if (deleg_cur == NULL)
1188 goto no_delegation;
1189
1190 spin_lock(&deleg_cur->lock);
17f26b12 1191 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1192 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1193 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1194 goto no_delegation_unlock;
1195
1196 if (delegation == NULL)
1197 delegation = &deleg_cur->stateid;
f597c537 1198 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1199 goto no_delegation_unlock;
1200
b7391f44 1201 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1202 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1203 ret = 1;
1204no_delegation_unlock:
1205 spin_unlock(&deleg_cur->lock);
1206no_delegation:
1207 rcu_read_unlock();
1208
1209 if (!ret && open_stateid != NULL) {
dc0b027d 1210 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1211 ret = 1;
1212 }
1213
1214 return ret;
1215}
1216
1217
dc0b027d 1218static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1219{
1220 struct nfs_delegation *delegation;
1221
1222 rcu_read_lock();
1223 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1224 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1225 rcu_read_unlock();
1226 return;
1227 }
1228 rcu_read_unlock();
57ec14c5 1229 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1230}
1231
6ee41268 1232static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1233{
1234 struct nfs4_state *state = opendata->state;
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_delegation *delegation;
f448badd 1237 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1238 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1239 nfs4_stateid stateid;
1240 int ret = -EAGAIN;
1241
aac00a8d 1242 for (;;) {
dc0b027d 1243 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1244 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1245 if (can_open_cached(state, fmode, open_mode)) {
1246 update_open_stateflags(state, fmode);
6ee41268 1247 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1248 goto out_return_state;
1249 }
1250 spin_unlock(&state->owner->so_lock);
1251 }
34310430
TM		 1252 rcu_read_lock();
1253 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1254 if (!can_open_delegated(delegation, fmode)) {
34310430 1255 rcu_read_unlock();
aac00a8d 1256 break;
34310430 1257 }
aac00a8d 1258 /* Save the delegation */
f597c537 1259 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1260 rcu_read_unlock();
fa332941 1261 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1262 if (!opendata->is_recover) {
1263 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1264 if (ret != 0)
1265 goto out;
1266 }
aac00a8d 1267 ret = -EAGAIN;
34310430
TM		 1268
1269 /* Try to update the stateid using the delegation */
dc0b027d 1270 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1271 goto out_return_state;
aac00a8d 1272 }
aac00a8d
TM		 1273out:
1274 return ERR_PTR(ret);
1275out_return_state:
1276 atomic_inc(&state->count);
1277 return state;
1278}
1279
e23008ec
AA		 1280static void
1281nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1282{
1283 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1284 struct nfs_delegation *delegation;
1285 int delegation_flags = 0;
1286
1287 rcu_read_lock();
1288 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1289 if (delegation)
1290 delegation_flags = delegation->flags;
1291 rcu_read_unlock();
1292 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1293 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1294 "returning a delegation for "
1295 "OPEN(CLAIM_DELEGATE_CUR)\n",
1296 clp->cl_hostname);
1297 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1298 nfs_inode_set_delegation(state->inode,
1299 data->owner->so_cred,
1300 &data->o_res);
1301 else
1302 nfs_inode_reclaim_delegation(state->inode,
1303 data->owner->so_cred,
1304 &data->o_res);
1305}
1306
1307/*
1308 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1309 * and update the nfs4_state.
1310 */
1311static struct nfs4_state *
1312_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1313{
1314 struct inode *inode = data->state->inode;
1315 struct nfs4_state *state = data->state;
1316 int ret;
1317
1318 if (!data->rpc_done) {
1319 ret = data->rpc_status;
1320 goto err;
1321 }
1322
1323 ret = -ESTALE;
1324 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1325 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1326 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1327 goto err;
1328
1329 ret = -ENOMEM;
1330 state = nfs4_get_open_state(inode, data->owner);
1331 if (state == NULL)
1332 goto err;
1333
1334 ret = nfs_refresh_inode(inode, &data->f_attr);
1335 if (ret)
1336 goto err;
1337
aa9c2669
DQ		 1338 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1339
e23008ec
AA		 1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
1342 update_open_stateid(state, &data->o_res.stateid, NULL,
1343 data->o_arg.fmode);
1344
1345 return state;
1346err:
1347 return ERR_PTR(ret);
1348
1349}
1350
1351static struct nfs4_state *
1352_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1353{
1354 struct inode *inode;
1355 struct nfs4_state *state = NULL;
1b370bc2 1356 int ret;
24ac23ab 1357
aac00a8d 1358 if (!data->rpc_done) {
6ee41268 1359 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1360 goto out;
1361 }
1362
1b370bc2 1363 ret = -EAGAIN;
24ac23ab 1364 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1365 goto err;
1775fd3e 1366 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1367 ret = PTR_ERR(inode);
03f28e3a 1368 if (IS_ERR(inode))
1b370bc2
TM		 1369 goto err;
1370 ret = -ENOMEM;
24ac23ab
TM		 1371 state = nfs4_get_open_state(inode, data->owner);
1372 if (state == NULL)
1b370bc2 1373 goto err_put_inode;
e23008ec
AA		 1374 if (data->o_res.delegation_type != 0)
1375 nfs4_opendata_check_deleg(data, state);
34310430 1376 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1377 data->o_arg.fmode);
24ac23ab 1378 iput(inode);
aac00a8d 1379out:
7aa262b5 1380 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1381 return state;
1b370bc2
TM		 1382err_put_inode:
1383 iput(inode);
1384err:
1385 return ERR_PTR(ret);
24ac23ab
TM		 1386}
1387
e23008ec
AA		 1388static struct nfs4_state *
1389nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1390{
1391 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1392 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1393 return _nfs4_opendata_to_nfs4_state(data);
1394}
1395
864472e9
TM		 1396static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1397{
1398 struct nfs_inode *nfsi = NFS_I(state->inode);
1399 struct nfs_open_context *ctx;
1400
1401 spin_lock(&state->inode->i_lock);
1402 list_for_each_entry(ctx, &nfsi->open_files, list) {
1403 if (ctx->state != state)
1404 continue;
1405 get_nfs_open_context(ctx);
1406 spin_unlock(&state->inode->i_lock);
1407 return ctx;
1408 }
1409 spin_unlock(&state->inode->i_lock);
1410 return ERR_PTR(-ENOENT);
1411}
1412
4a1c0893
TM		 1413static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1414 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1415{
1416 struct nfs4_opendata *opendata;
1417
4a1c0893 1418 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1419 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1420 if (opendata == NULL)
1421 return ERR_PTR(-ENOMEM);
1422 opendata->state = state;
1423 atomic_inc(&state->count);
1424 return opendata;
1425}
1426
dc0b027d 1427static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1428{
2ced46c2 1429 struct nfs4_state *newstate;
864472e9
TM		 1430 int ret;
1431
dc0b027d
TM		 1432 opendata->o_arg.open_flags = 0;
1433 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1434 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1435 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1436 nfs4_init_opendata_res(opendata);
b257957e 1437 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1438 if (ret != 0)
1439 return ret;
2ced46c2 1440 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1441 if (IS_ERR(newstate))
1442 return PTR_ERR(newstate);
643168c2 1443 nfs4_close_state(newstate, fmode);
2ced46c2 1444 *res = newstate;
864472e9
TM		 1445 return 0;
1446}
1447
1448static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1449{
864472e9 1450 struct nfs4_state *newstate;
864472e9
TM		 1451 int ret;
1452
1453 /* memory barrier prior to reading state->n_* */
2ced46c2 1454 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1455 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1456 smp_rmb();
1457 if (state->n_rdwr != 0) {
b0ed9dbc 1458 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1459 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1460 if (ret != 0)
1461 return ret;
2ced46c2
TM		 1462 if (newstate != state)
1463 return -ESTALE;
864472e9
TM		 1464 }
1465 if (state->n_wronly != 0) {
b0ed9dbc 1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1467 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1468 if (ret != 0)
1469 return ret;
2ced46c2
TM		 1470 if (newstate != state)
1471 return -ESTALE;
864472e9
TM		 1472 }
1473 if (state->n_rdonly != 0) {
b0ed9dbc 1474 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1475 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1476 if (ret != 0)
1477 return ret;
2ced46c2
TM		 1478 if (newstate != state)
1479 return -ESTALE;
864472e9 1480 }
1ac7e2fd
TM		 1481 /*
1482 * We may have performed cached opens for all three recoveries.
1483 * Check if we need to update the current stateid.
1484 */
1485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1486 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1487 write_seqlock(&state->seqlock);
1ac7e2fd 1488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1489 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1490 write_sequnlock(&state->seqlock);
1ac7e2fd 1491 }
864472e9
TM		 1492 return 0;
1493}
1494
1da177e4
LT		 1495/*
1496 * OPEN_RECLAIM:
1497 * reclaim state on the server after a reboot.
1da177e4 1498 */
539cd03a 1499static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1500{
1ac7e2fd 1501 struct nfs_delegation *delegation;
864472e9 1502 struct nfs4_opendata *opendata;
dc0b027d 1503 fmode_t delegation_type = 0;
1da177e4
LT		 1504 int status;
1505
4a1c0893
TM		 1506 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1507 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1508 if (IS_ERR(opendata))
1509 return PTR_ERR(opendata);
1ac7e2fd
TM		 1510 rcu_read_lock();
1511 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1512 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1513 delegation_type = delegation->type;
1ac7e2fd 1514 rcu_read_unlock();
864472e9
TM		 1515 opendata->o_arg.u.delegation_type = delegation_type;
1516 status = nfs4_open_recover(opendata, state);
c6d00e63 1517 nfs4_opendata_put(opendata);
1da177e4
LT		 1518 return status;
1519}
1520
539cd03a 1521static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1522{
1523 struct nfs_server *server = NFS_SERVER(state->inode);
1524 struct nfs4_exception exception = { };
1525 int err;
1526 do {
539cd03a 1527 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1528 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1529 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1530 continue;
168667c4 1531 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1532 break;
1533 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1534 } while (exception.retry);
1535 return err;
1536}
1537
864472e9
TM		 1538static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1539{
1540 struct nfs_open_context *ctx;
1541 int ret;
1542
1543 ctx = nfs4_state_find_open_context(state);
1544 if (IS_ERR(ctx))
91876b13 1545 return -EAGAIN;
539cd03a 1546 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1547 put_nfs_open_context(ctx);
1548 return ret;
1549}
1550
db4f2e63 1551static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1552{
be76b5b6
TM		 1553 switch (err) {
1554 default:
1555 printk(KERN_ERR "NFS: %s: unhandled error "
1556 "%d.\n", __func__, err);
1557 case 0:
1558 case -ENOENT:
1559 case -ESTALE:
1560 break;
1561 case -NFS4ERR_BADSESSION:
1562 case -NFS4ERR_BADSLOT:
1563 case -NFS4ERR_BAD_HIGH_SLOT:
1564 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1565 case -NFS4ERR_DEADSESSION:
1566 set_bit(NFS_DELEGATED_STATE, &state->flags);
1567 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1568 return -EAGAIN;
1569 case -NFS4ERR_STALE_CLIENTID:
1570 case -NFS4ERR_STALE_STATEID:
1571 set_bit(NFS_DELEGATED_STATE, &state->flags);
1572 case -NFS4ERR_EXPIRED:
1573 /* Don't recall a delegation if it was lost */
1574 nfs4_schedule_lease_recovery(server->nfs_client);
1575 return -EAGAIN;
1576 case -NFS4ERR_DELEG_REVOKED:
1577 case -NFS4ERR_ADMIN_REVOKED:
1578 case -NFS4ERR_BAD_STATEID:
db4f2e63 1579 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1580 nfs_inode_find_state_and_recover(state->inode,
1581 stateid);
1582 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1583 return 0;
1584 case -NFS4ERR_DELAY:
1585 case -NFS4ERR_GRACE:
1586 set_bit(NFS_DELEGATED_STATE, &state->flags);
1587 ssleep(1);
1588 return -EAGAIN;
db4f2e63
TM		 1589 case -ENOMEM:
1590 case -NFS4ERR_DENIED:
1591 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1592 return 0;
be76b5b6 1593 }
1da177e4
LT		 1594 return err;
1595}
1596
db4f2e63
TM		 1597int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1598{
1599 struct nfs_server *server = NFS_SERVER(state->inode);
1600 struct nfs4_opendata *opendata;
1601 int err;
1602
1603 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1604 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1605 if (IS_ERR(opendata))
1606 return PTR_ERR(opendata);
1607 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1608 err = nfs4_open_recover(opendata, state);
1609 nfs4_opendata_put(opendata);
1610 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1611}
1612
be05c860
CL		 1613static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1614{
1615 struct nfs4_opendata *data = calldata;
1616
1617 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1618 &data->o_res.seq_res, task);
1619}
1620
cdd4e68b
TM		 1621static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1622{
1623 struct nfs4_opendata *data = calldata;
1624
be05c860
CL		 1625 nfs40_sequence_done(task, &data->o_res.seq_res);
1626
cdd4e68b 1627 data->rpc_status = task->tk_status;
26e976a8 1628 if (data->rpc_status == 0) {
f597c537 1629 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1630 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1631 renew_lease(data->o_res.server, data->timestamp);
3e309914 1632 data->rpc_done = 1;
26e976a8 1633 }
cdd4e68b
TM		 1634}
1635
1636static void nfs4_open_confirm_release(void *calldata)
1637{
1638 struct nfs4_opendata *data = calldata;
1639 struct nfs4_state *state = NULL;
1640
1641 /* If this request hasn't been cancelled, do nothing */
1642 if (data->cancelled == 0)
1643 goto out_free;
1644 /* In case of error, no cleanup! */
3e309914 1645 if (!data->rpc_done)
cdd4e68b 1646 goto out_free;
cdd4e68b 1647 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1648 if (!IS_ERR(state))
643168c2 1649 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1650out_free:
c6d00e63 1651 nfs4_opendata_put(data);
cdd4e68b
TM		 1652}
1653
1654static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1655 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1656 .rpc_call_done = nfs4_open_confirm_done,
1657 .rpc_release = nfs4_open_confirm_release,
1658};
1659
1660/*
1661 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1662 */
1663static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1664{
1665 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1666 struct rpc_task *task;
5138fde0
TM		 1667 struct rpc_message msg = {
1668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1669 .rpc_argp = &data->c_arg,
1670 .rpc_resp = &data->c_res,
1671 .rpc_cred = data->owner->so_cred,
1672 };
c970aa85
TM		 1673 struct rpc_task_setup task_setup_data = {
1674 .rpc_client = server->client,
5138fde0 1675 .rpc_message = &msg,
c970aa85
TM		 1676 .callback_ops = &nfs4_open_confirm_ops,
1677 .callback_data = data,
101070ca 1678 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1679 .flags = RPC_TASK_ASYNC,
1680 };
1da177e4
LT		 1681 int status;
1682
be05c860 1683 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1684 kref_get(&data->kref);
3e309914
TM		 1685 data->rpc_done = 0;
1686 data->rpc_status = 0;
5138fde0 1687 data->timestamp = jiffies;
c970aa85 1688 task = rpc_run_task(&task_setup_data);
7a1218a2 1689 if (IS_ERR(task))
cdd4e68b 1690 return PTR_ERR(task);
cdd4e68b
TM		 1691 status = nfs4_wait_for_completion_rpc_task(task);
1692 if (status != 0) {
1693 data->cancelled = 1;
1694 smp_wmb();
1695 } else
1696 status = data->rpc_status;
e6b3c4db 1697 rpc_put_task(task);
1da177e4
LT		 1698 return status;
1699}
1700
24ac23ab 1701static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1702{
24ac23ab
TM		 1703 struct nfs4_opendata *data = calldata;
1704 struct nfs4_state_owner *sp = data->owner;
549b19cc 1705 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1706
24ac23ab 1707 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1708 goto out_wait;
aac00a8d
TM		 1709 /*
1710 * Check if we still need to send an OPEN call, or if we can use
1711 * a delegation instead.
1712 */
1713 if (data->state != NULL) {
1714 struct nfs_delegation *delegation;
1715
dc0b027d 1716 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1717 goto out_no_action;
aac00a8d
TM		 1718 rcu_read_lock();
1719 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1720 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1721 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1722 can_open_delegated(delegation, data->o_arg.fmode))
1723 goto unlock_no_action;
aac00a8d
TM		 1724 rcu_read_unlock();
1725 }
95b72eb0 1726 /* Update client id. */
549b19cc 1727 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1728 switch (data->o_arg.claim) {
1729 case NFS4_OPEN_CLAIM_PREVIOUS:
1730 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1731 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1732 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1733 case NFS4_OPEN_CLAIM_FH:
1734 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1735 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1736 }
26e976a8 1737 data->timestamp = jiffies;
035168ab 1738 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1739 &data->o_arg.seq_args,
2240a9e2
TM		 1740 &data->o_res.seq_res,
1741 task) != 0)
1742 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1743
1744 /* Set the create mode (note dependency on the session type) */
1745 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1746 if (data->o_arg.open_flags & O_EXCL) {
1747 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1748 if (nfs4_has_persistent_session(clp))
1749 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1750 else if (clp->cl_mvops->minor_version > 0)
1751 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1752 }
6ee41268 1753 return;
652f89f6
TM		 1754unlock_no_action:
1755 rcu_read_unlock();
6ee41268
TM		 1756out_no_action:
1757 task->tk_action = NULL;
c8da19b9 1758out_wait:
b75ad4cd 1759 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1760}
1761
24ac23ab
TM		 1762static void nfs4_open_done(struct rpc_task *task, void *calldata)
1763{
1764 struct nfs4_opendata *data = calldata;
1da177e4 1765
24ac23ab 1766 data->rpc_status = task->tk_status;
d898528c 1767
14516c3a
TM		 1768 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1769 return;
d898528c 1770
24ac23ab 1771 if (task->tk_status == 0) {
807d66d8
TM		 1772 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1773 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1774 case S_IFREG:
1775 break;
1776 case S_IFLNK:
24ac23ab 1777 data->rpc_status = -ELOOP;
6f926b5b
TM		 1778 break;
1779 case S_IFDIR:
24ac23ab 1780 data->rpc_status = -EISDIR;
6f926b5b
TM		 1781 break;
1782 default:
24ac23ab 1783 data->rpc_status = -ENOTDIR;
807d66d8 1784 }
6f926b5b 1785 }
26e976a8 1786 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1787 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1788 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1789 }
3e309914 1790 data->rpc_done = 1;
24ac23ab 1791}
6f926b5b 1792
24ac23ab
TM		 1793static void nfs4_open_release(void *calldata)
1794{
1795 struct nfs4_opendata *data = calldata;
1796 struct nfs4_state *state = NULL;
1797
1798 /* If this request hasn't been cancelled, do nothing */
1799 if (data->cancelled == 0)
1800 goto out_free;
1801 /* In case of error, no cleanup! */
3e309914 1802 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1803 goto out_free;
1804 /* In case we need an open_confirm, no cleanup! */
1805 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1806 goto out_free;
24ac23ab 1807 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1808 if (!IS_ERR(state))
643168c2 1809 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1810out_free:
c6d00e63 1811 nfs4_opendata_put(data);
24ac23ab
TM		 1812}
1813
1814static const struct rpc_call_ops nfs4_open_ops = {
1815 .rpc_call_prepare = nfs4_open_prepare,
1816 .rpc_call_done = nfs4_open_done,
1817 .rpc_release = nfs4_open_release,
1818};
1819
b257957e 1820static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1821{
1822 struct inode *dir = data->dir->d_inode;
1823 struct nfs_server *server = NFS_SERVER(dir);
1824 struct nfs_openargs *o_arg = &data->o_arg;
1825 struct nfs_openres *o_res = &data->o_res;
1826 struct rpc_task *task;
5138fde0
TM		 1827 struct rpc_message msg = {
1828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1829 .rpc_argp = o_arg,
1830 .rpc_resp = o_res,
1831 .rpc_cred = data->owner->so_cred,
1832 };
c970aa85
TM		 1833 struct rpc_task_setup task_setup_data = {
1834 .rpc_client = server->client,
5138fde0 1835 .rpc_message = &msg,
c970aa85
TM		 1836 .callback_ops = &nfs4_open_ops,
1837 .callback_data = data,
101070ca 1838 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1839 .flags = RPC_TASK_ASYNC,
1840 };
24ac23ab
TM		 1841 int status;
1842
a9c92d6b 1843 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1844 kref_get(&data->kref);
3e309914
TM		 1845 data->rpc_done = 0;
1846 data->rpc_status = 0;
2ced46c2 1847 data->cancelled = 0;
bdeca1b7
TM		 1848 data->is_recover = 0;
1849 if (isrecover) {
8fe72bac 1850 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1851 data->is_recover = 1;
1852 }
c970aa85 1853 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1854 if (IS_ERR(task))
1855 return PTR_ERR(task);
1856 status = nfs4_wait_for_completion_rpc_task(task);
1857 if (status != 0) {
1858 data->cancelled = 1;
1859 smp_wmb();
1860 } else
1861 status = data->rpc_status;
1862 rpc_put_task(task);
1863
1864 return status;
1865}
1866
1867static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1868{
1869 struct inode *dir = data->dir->d_inode;
1870 struct nfs_openres *o_res = &data->o_res;
1871 int status;
1872
1873 status = nfs4_run_open_task(data, 1);
1874 if (status != 0 || !data->rpc_done)
1875 return status;
1876
6926afd1
TM		 1877 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1878
b257957e
AB		 1879 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1880 status = _nfs4_proc_open_confirm(data);
1881 if (status != 0)
1882 return status;
1883 }
1884
1885 return status;
1886}
1887
6168f62c
WAA		 1888static int nfs4_opendata_access(struct rpc_cred *cred,
1889 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1890 struct nfs4_state *state, fmode_t fmode,
1891 int openflags)
6168f62c
WAA		 1892{
1893 struct nfs_access_entry cache;
1894 u32 mask;
1895
1896 /* access call failed or for some reason the server doesn't
1897 * support any access modes -- defer access call until later */
1898 if (opendata->o_res.access_supported == 0)
1899 return 0;
1900
1901 mask = 0;
bbd3a8ee 1902 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1903 * write mode bits, but POSIX allows the creating process to write.
1904 * use openflags to check for exec, because fmode won't
1905 * always have FMODE_EXEC set when file open for exec. */
1906 if (openflags & __FMODE_EXEC) {
1907 /* ONLY check for exec rights */
1908 mask = MAY_EXEC;
1909 } else if (fmode & FMODE_READ)
1910 mask = MAY_READ;
6168f62c
WAA		 1911
1912 cache.cred = cred;
1913 cache.jiffies = jiffies;
1914 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1915 nfs_access_add_cache(state->inode, &cache);
1916
bbd3a8ee 1917 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1918 return 0;
1919
1920 /* even though OPEN succeeded, access is denied. Close the file */
1921 nfs4_close_state(state, fmode);
998f40b5 1922 return -EACCES;
6168f62c
WAA		 1923}
1924
b257957e
AB		 1925/*
1926 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1927 */
1928static int _nfs4_proc_open(struct nfs4_opendata *data)
1929{
1930 struct inode *dir = data->dir->d_inode;
1931 struct nfs_server *server = NFS_SERVER(dir);
1932 struct nfs_openargs *o_arg = &data->o_arg;
1933 struct nfs_openres *o_res = &data->o_res;
1934 int status;
1935
1936 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1937 if (!data->rpc_done)
1938 return status;
1939 if (status != 0) {
1940 if (status == -NFS4ERR_BADNAME &&
1941 !(o_arg->open_flags & O_CREAT))
1942 return -ENOENT;
24ac23ab 1943 return status;
08ef7bd3 1944 }
24ac23ab 1945
6926afd1
TM		 1946 nfs_fattr_map_and_free_names(server, &data->f_attr);
1947
90ff0c54 1948 if (o_arg->open_flags & O_CREAT)
56ae19f3 1949 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1950 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1951 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1952 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1953 status = _nfs4_proc_open_confirm(data);
1da177e4 1954 if (status != 0)
24ac23ab 1955 return status;
1da177e4
LT		 1956 }
1957 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1958 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1959 return 0;
1da177e4
LT		 1960}
1961
d83217c1
AA		 1962static int nfs4_recover_expired_lease(struct nfs_server *server)
1963{
1964 return nfs4_client_recover_expired_lease(server->nfs_client);
1965}
1966
1da177e4
LT		 1967/*
1968 * OPEN_EXPIRED:
1969 * reclaim state on the server after a network partition.
1970 * Assumes caller holds the appropriate lock
1971 */
539cd03a 1972static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1973{
e56e0b78 1974 struct nfs4_opendata *opendata;
864472e9 1975 int ret;
1da177e4 1976
4a1c0893 1977 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1978 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1979 if (IS_ERR(opendata))
1980 return PTR_ERR(opendata);
864472e9 1981 ret = nfs4_open_recover(opendata, state);
35d05778 1982 if (ret == -ESTALE)
3d4ff43d 1983 d_drop(ctx->dentry);
c6d00e63 1984 nfs4_opendata_put(opendata);
864472e9 1985 return ret;
1da177e4
LT		 1986}
1987
a9ed2e25 1988static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1989{
539cd03a 1990 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1991 struct nfs4_exception exception = { };
1992 int err;
1993
1994 do {
539cd03a 1995 err = _nfs4_open_expired(ctx, state);
42113a75 1996 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1997 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1998 continue;
a9ed2e25
TM		 1999 switch (err) {
2000 default:
2001 goto out;
2002 case -NFS4ERR_GRACE:
2003 case -NFS4ERR_DELAY:
2004 nfs4_handle_exception(server, err, &exception);
2005 err = 0;
2006 }
202b50dc 2007 } while (exception.retry);
a9ed2e25 2008out:
202b50dc
TM		 2009 return err;
2010}
2011
1da177e4
LT		 2012static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2013{
1da177e4 2014 struct nfs_open_context *ctx;
864472e9 2015 int ret;
1da177e4 2016
864472e9
TM		 2017 ctx = nfs4_state_find_open_context(state);
2018 if (IS_ERR(ctx))
91876b13 2019 return -EAGAIN;
539cd03a 2020 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2021 put_nfs_open_context(ctx);
2022 return ret;
1da177e4
LT		 2023}
2024
f062eb6c 2025#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2026static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2027{
f062eb6c 2028 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2029 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2030 struct nfs_delegation *delegation;
2031 struct rpc_cred *cred = NULL;
2032 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2033
2034 /* If a state reset has been done, test_stateid is unneeded */
2035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2036 return;
2037
ab7cb0df
TM		 2038 /* Get the delegation credential for use by test/free_stateid */
2039 rcu_read_lock();
2040 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2041 if (delegation != NULL &&
2042 nfs4_stateid_match(&delegation->stateid, stateid)) {
2043 cred = get_rpccred(delegation->cred);
2044 rcu_read_unlock();
2045 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2046 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2047 } else
2048 rcu_read_unlock();
2049
3e60ffdd
CL		 2050 if (status != NFS_OK) {
2051 /* Free the stateid unless the server explicitly
2052 * informs us the stateid is unrecognized. */
2053 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2054 nfs41_free_stateid(server, stateid, cred);
6938867e 2055 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2056
6938867e
BS		 2057 write_seqlock(&state->seqlock);
2058 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2059 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2060 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2061 }
ab7cb0df
TM		 2062
2063 if (cred != NULL)
2064 put_rpccred(cred);
3e60ffdd
CL		 2065}
2066
2067/**
2068 * nfs41_check_open_stateid - possibly free an open stateid
2069 *
2070 * @state: NFSv4 state for an inode
2071 *
2072 * Returns NFS_OK if recovery for this stateid is now finished.
2073 * Otherwise a negative NFS4ERR value is returned.
2074 */
2075static int nfs41_check_open_stateid(struct nfs4_state *state)
2076{
2077 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2078 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2079 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2080 int status;
2081
2082 /* If a state reset has been done, test_stateid is unneeded */
2083 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2084 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2085 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2086 return -NFS4ERR_BAD_STATEID;
2087
ab7cb0df 2088 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2089 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2090 if (status != NFS_OK) {
2091 /* Free the stateid unless the server explicitly
2092 * informs us the stateid is unrecognized. */
2093 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2094 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2095
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2099 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2100 }
2101 return status;
2102}
2103
2104static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2105{
eb64cf96 2106 int status;
b01dd1d8 2107
3e60ffdd
CL		 2108 nfs41_clear_delegation_stateid(state);
2109 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2110 if (status != NFS_OK)
2111 status = nfs4_open_expired(sp, state);
2112 return status;
f062eb6c
BS		 2113}
2114#endif
2115
aa53ed54
JL		 2116/*
2117 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2118 * fields corresponding to attributes that were used to store the verifier.
2119 * Make sure we clobber those fields in the later setattr call
2120 */
2121static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2122{
2123 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2124 !(sattr->ia_valid & ATTR_ATIME_SET))
2125 sattr->ia_valid |= ATTR_ATIME;
2126
2127 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2128 !(sattr->ia_valid & ATTR_MTIME_SET))
2129 sattr->ia_valid |= ATTR_MTIME;
2130}
2131
c21443c2
TM		 2132static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2133 fmode_t fmode,
2134 int flags,
3efb9722 2135 struct nfs_open_context *ctx)
c21443c2
TM		 2136{
2137 struct nfs4_state_owner *sp = opendata->owner;
2138 struct nfs_server *server = sp->so_server;
275bb307 2139 struct dentry *dentry;
c21443c2
TM		 2140 struct nfs4_state *state;
2141 unsigned int seq;
2142 int ret;
2143
2144 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2145
2146 ret = _nfs4_proc_open(opendata);
2147 if (ret != 0)
2148 goto out;
2149
2150 state = nfs4_opendata_to_nfs4_state(opendata);
2151 ret = PTR_ERR(state);
2152 if (IS_ERR(state))
2153 goto out;
2154 if (server->caps & NFS_CAP_POSIX_LOCK)
2155 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2156
275bb307
TM		 2157 dentry = opendata->dentry;
2158 if (dentry->d_inode == NULL) {
2159 /* FIXME: Is this d_drop() ever needed? */
2160 d_drop(dentry);
2161 dentry = d_add_unique(dentry, igrab(state->inode));
2162 if (dentry == NULL) {
2163 dentry = opendata->dentry;
2164 } else if (dentry != ctx->dentry) {
2165 dput(ctx->dentry);
2166 ctx->dentry = dget(dentry);
2167 }
2168 nfs_set_verifier(dentry,
2169 nfs_save_change_attribute(opendata->dir->d_inode));
2170 }
2171
c21443c2
TM		 2172 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2173 if (ret != 0)
2174 goto out;
2175
3efb9722 2176 ctx->state = state;
c45ffdd2
TM		 2177 if (dentry->d_inode == state->inode) {
2178 nfs_inode_attach_open_context(ctx);
2179 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2180 nfs4_schedule_stateid_recovery(server, state);
2181 }
c21443c2
TM		 2182out:
2183 return ret;
2184}
2185
1da177e4 2186/*
24ac23ab 2187 * Returns a referenced nfs4_state
1da177e4 2188 */
82be417a 2189static int _nfs4_do_open(struct inode *dir,
4197a055 2190 struct nfs_open_context *ctx,
82be417a
AA		 2191 int flags,
2192 struct iattr *sattr,
959d921f 2193 struct nfs4_label *label)
1da177e4
LT		 2194{
2195 struct nfs4_state_owner *sp;
2196 struct nfs4_state *state = NULL;
2197 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2198 struct nfs4_opendata *opendata;
4197a055
TM		 2199 struct dentry *dentry = ctx->dentry;
2200 struct rpc_cred *cred = ctx->cred;
2201 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2202 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2203 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2204 struct nfs4_label *olabel = NULL;
aac00a8d 2205 int status;
1da177e4
LT		 2206
2207 /* Protect against reboot recovery conflicts */
1da177e4 2208 status = -ENOMEM;
d1e284d5
TM		 2209 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2210 if (sp == NULL) {
1da177e4
LT		 2211 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2212 goto out_err;
2213 }
58d9714a
TM		 2214 status = nfs4_recover_expired_lease(server);
2215 if (status != 0)
b4454fe1 2216 goto err_put_state_owner;
82a2c1b7
AV		 2217 if (dentry->d_inode != NULL)
2218 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2219 status = -ENOMEM;
49f9a0fa
TM		 2220 if (dentry->d_inode)
2221 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2222 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2223 label, claim, GFP_KERNEL);
e56e0b78 2224 if (opendata == NULL)
95d35cb4 2225 goto err_put_state_owner;
1da177e4 2226
14c43f76
DQ		 2227 if (label) {
2228 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2229 if (IS_ERR(olabel)) {
2230 status = PTR_ERR(olabel);
2231 goto err_opendata_put;
2232 }
2233 }
2234
82be417a
AA		 2235 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2236 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2237 if (!opendata->f_attr.mdsthreshold)
14c43f76 2238 goto err_free_label;
1549210f 2239 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2240 }
82a2c1b7
AV		 2241 if (dentry->d_inode != NULL)
2242 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2243
3efb9722 2244 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2245 if (status != 0)
14c43f76 2246 goto err_free_label;
3efb9722 2247 state = ctx->state;
6168f62c 2248
549b19cc
TM		 2249 if ((opendata->o_arg.open_flags & O_EXCL) &&
2250 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2251 nfs4_exclusive_attrset(opendata, sattr);
2252
2253 nfs_fattr_init(opendata->o_res.f_attr);
2254 status = nfs4_do_setattr(state->inode, cred,
2255 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2256 state, label, olabel);
2257 if (status == 0) {
0ab64e0e 2258 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2259 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2260 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2261 }
0ab64e0e 2262 }
82be417a
AA		 2263
2264 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2265 *ctx_th = opendata->f_attr.mdsthreshold;
2266 else
2267 kfree(opendata->f_attr.mdsthreshold);
2268 opendata->f_attr.mdsthreshold = NULL;
2269
14c43f76
DQ		 2270 nfs4_label_free(olabel);
2271
c6d00e63 2272 nfs4_opendata_put(opendata);
1da177e4 2273 nfs4_put_state_owner(sp);
1da177e4 2274 return 0;
14c43f76
DQ		 2275err_free_label:
2276 nfs4_label_free(olabel);
c6d00e63 2277err_opendata_put:
82be417a 2278 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2279 nfs4_opendata_put(opendata);
e56e0b78
TM		 2280err_put_state_owner:
2281 nfs4_put_state_owner(sp);
1da177e4 2282out_err:
1da177e4
LT		 2283 return status;
2284}
2285
2286
82be417a 2287static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2288 struct nfs_open_context *ctx,
82be417a
AA		 2289 int flags,
2290 struct iattr *sattr,
959d921f 2291 struct nfs4_label *label)
1da177e4 2292{
49f9a0fa 2293 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2294 struct nfs4_exception exception = { };
2295 struct nfs4_state *res;
2296 int status;
2297
2298 do {
959d921f 2299 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2300 res = ctx->state;
42113a75 2301 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2302 if (status == 0)
2303 break;
2304 /* NOTE: BAD_SEQID means the server and client disagree about the
2305 * book-keeping w.r.t. state-changing operations
2306 * (OPEN/CLOSE/LOCK/LOCKU...)
2307 * It is actually a sign of a bug on the client or on the server.
2308 *
2309 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2310 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2311 * have unhashed the old state_owner for us, and that we can
2312 * therefore safely retry using a new one. We should still warn
2313 * the user though...
2314 */
2315 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2316 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2317 " returned a bad sequence-id error!\n",
2318 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2319 exception.retry = 1;
2320 continue;
2321 }
550f5747
TM		 2322 /*
2323 * BAD_STATEID on OPEN means that the server cancelled our
2324 * state before it received the OPEN_CONFIRM.
2325 * Recover by retrying the request as per the discussion
2326 * on Page 181 of RFC3530.
2327 */
2328 if (status == -NFS4ERR_BAD_STATEID) {
2329 exception.retry = 1;
2330 continue;
2331 }
aac00a8d
TM		 2332 if (status == -EAGAIN) {
2333 /* We must have found a delegation */
2334 exception.retry = 1;
2335 continue;
2336 }
49f9a0fa
TM		 2337 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2338 continue;
2339 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2340 status, &exception));
2341 } while (exception.retry);
2342 return res;
2343}
2344
659bfcd6
TM		 2345static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2346 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2347 struct nfs4_state *state, struct nfs4_label *ilabel,
2348 struct nfs4_label *olabel)
1da177e4 2349{
3e4f6290 2350 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2351 struct nfs_setattrargs arg = {
3e4f6290 2352 .fh = NFS_FH(inode),
1da177e4
LT		 2353 .iap = sattr,
2354 .server = server,
2355 .bitmask = server->attr_bitmask,
1775fd3e 2356 .label = ilabel,
1da177e4
LT		 2357 };
2358 struct nfs_setattrres res = {
2359 .fattr = fattr,
1775fd3e 2360 .label = olabel,
1da177e4
LT		 2361 .server = server,
2362 };
2363 struct rpc_message msg = {
659bfcd6
TM		 2364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2365 .rpc_argp = &arg,
2366 .rpc_resp = &res,
2367 .rpc_cred = cred,
1da177e4 2368 };
26e976a8 2369 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2370 fmode_t fmode;
2371 bool truncate;
65e4308d 2372 int status;
1da177e4 2373
aa9c2669
DQ		 2374 arg.bitmask = nfs4_bitmask(server, ilabel);
2375 if (ilabel)
2376 arg.bitmask = nfs4_bitmask(server, olabel);
2377
0e574af1 2378 nfs_fattr_init(fattr);
1da177e4 2379
ee3ae84e
TM		 2380 /* Servers should only apply open mode checks for file size changes */
2381 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2382 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2383
2384 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2385 /* Use that stateid */
2386 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2387 struct nfs_lockowner lockowner = {
2388 .l_owner = current->files,
2389 .l_pid = current->tgid,
2390 };
4fc8796d 2391 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2392 &lockowner);
08e9eac4 2393 } else
f597c537 2394 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2395
7c513058 2396 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2397 if (status == 0 && state != NULL)
2398 renew_lease(server, timestamp);
65e4308d 2399 return status;
1da177e4
LT		 2400}
2401
659bfcd6
TM		 2402static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2403 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2404 struct nfs4_state *state, struct nfs4_label *ilabel,
2405 struct nfs4_label *olabel)
1da177e4 2406{
3e4f6290 2407 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2408 struct nfs4_exception exception = {
2409 .state = state,
3114ea7a 2410 .inode = inode,
a1d0b5ee 2411 };
1da177e4
LT		 2412 int err;
2413 do {
1775fd3e 2414 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2415 trace_nfs4_setattr(inode, err);
451146be
TM		 2416 switch (err) {
2417 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2418 if (!(sattr->ia_valid & ATTR_SIZE)) {
2419 pr_warn_once("NFSv4: server %s is incorrectly "
2420 "applying open mode checks to "
2421 "a SETATTR that is not "
2422 "changing file size.\n",
2423 server->nfs_client->cl_hostname);
2424 }
451146be
TM		 2425 if (state && !(state->state & FMODE_WRITE)) {
2426 err = -EBADF;
2427 if (sattr->ia_valid & ATTR_OPEN)
2428 err = -EACCES;
2429 goto out;
2430 }
2431 }
2432 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2433 } while (exception.retry);
451146be 2434out:
1da177e4
LT		 2435 return err;
2436}
2437
2438struct nfs4_closedata {
2439 struct inode *inode;
2440 struct nfs4_state *state;
2441 struct nfs_closeargs arg;
2442 struct nfs_closeres res;
516a6af6 2443 struct nfs_fattr fattr;
26e976a8 2444 unsigned long timestamp;
f7e8917a
FI		 2445 bool roc;
2446 u32 roc_barrier;
1da177e4
LT		 2447};
2448
963d8fe5 2449static void nfs4_free_closedata(void *data)
9512135d 2450{
963d8fe5
TM		 2451 struct nfs4_closedata *calldata = data;
2452 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2453 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2454
f7e8917a
FI		 2455 if (calldata->roc)
2456 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2457 nfs4_put_open_state(calldata->state);
2458 nfs_free_seqid(calldata->arg.seqid);
9512135d 2459 nfs4_put_state_owner(sp);
322b2b90 2460 nfs_sb_deactive(sb);
9512135d
TM		 2461 kfree(calldata);
2462}
2463
88069f77
TM		 2464static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2465 fmode_t fmode)
2466{
2467 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2468 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2469 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2470 case FMODE_WRITE:
88069f77 2471 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2472 break;
2473 case FMODE_READ:
88069f77 2474 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2475 break;
2476 case 0:
2477 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2478 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2479 clear_bit(NFS_OPEN_STATE, &state->flags);
2480 }
88069f77
TM		 2481 spin_unlock(&state->owner->so_lock);
2482}
2483
963d8fe5 2484static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2485{
963d8fe5 2486 struct nfs4_closedata *calldata = data;
1da177e4 2487 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2488 struct nfs_server *server = NFS_SERVER(calldata->inode);
2489
a3ca5651 2490 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2491 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2492 return;
42113a75 2493 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2494 /* hmm. we are done with the inode, and in the process of freeing
2495 * the state_owner. we keep this around to process errors
2496 */
1da177e4
LT		 2497 switch (task->tk_status) {
2498 case 0:
f7e8917a
FI		 2499 if (calldata->roc)
2500 pnfs_roc_set_barrier(state->inode,
2501 calldata->roc_barrier);
45328c35 2502 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2503 renew_lease(server, calldata->timestamp);
88069f77
TM		 2504 nfs4_close_clear_stateid_flags(state,
2505 calldata->arg.fmode);
1da177e4
LT		 2506 break;
2507 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2508 case -NFS4ERR_OLD_STATEID:
2509 case -NFS4ERR_BAD_STATEID:
1da177e4 2510 case -NFS4ERR_EXPIRED:
dc0b027d 2511 if (calldata->arg.fmode == 0)
9e33bed5 2512 break;
1da177e4 2513 default:
72211dbe
TM		 2514 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2515 rpc_restart_call_prepare(task);
1da177e4 2516 }
72211dbe 2517 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2518 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2519 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2520}
2521
4ce70ada 2522static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2523{
4ce70ada 2524 struct nfs4_closedata *calldata = data;
9512135d 2525 struct nfs4_state *state = calldata->state;
7fdab069 2526 struct inode *inode = calldata->inode;
88069f77 2527 int call_close = 0;
9512135d 2528
a3ca5651 2529 dprintk("%s: begin!\n", __func__);
963d8fe5 2530 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2531 goto out_wait;
003707c7 2532
88069f77
TM		 2533 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2534 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2535 spin_lock(&state->owner->so_lock);
003707c7 2536 /* Calculate the change in open mode */
e7616923 2537 if (state->n_rdwr == 0) {
003707c7 2538 if (state->n_rdonly == 0) {
88069f77
TM		 2539 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2540 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2541 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2542 }
2543 if (state->n_wronly == 0) {
88069f77
TM		 2544 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2545 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2546 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2547 }
e7616923 2548 }
5d422301
TM		 2549 if (!nfs4_valid_open_stateid(state))
2550 call_close = 0;
4cecb76f 2551 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2552
2553 if (!call_close) {
963d8fe5 2554 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2555 goto out_no_action;
9512135d 2556 }
88069f77 2557
f7e8917a 2558 if (calldata->arg.fmode == 0) {
88069f77 2559 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2560 if (calldata->roc &&
b9536ad5
AA		 2561 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2562 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2563 goto out_wait;
b9536ad5 2564 }
f7e8917a 2565 }
88069f77 2566
516a6af6 2567 nfs_fattr_init(calldata->res.fattr);
26e976a8 2568 calldata->timestamp = jiffies;
7fdab069 2569 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2570 &calldata->arg.seq_args,
2571 &calldata->res.seq_res,
2240a9e2
TM		 2572 task) != 0)
2573 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2574 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2575 return;
2576out_no_action:
2577 task->tk_action = NULL;
2578out_wait:
2579 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2580}
2581
963d8fe5 2582static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2583 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2584 .rpc_call_done = nfs4_close_done,
2585 .rpc_release = nfs4_free_closedata,
2586};
2587
1da177e4
LT		 2588/*
2589 * It is possible for data to be read/written from a mem-mapped file
2590 * after the sys_close call (which hits the vfs layer as a flush).
2591 * This means that we can't safely call nfsv4 close on a file until
2592 * the inode is cleared. This in turn means that we are not good
2593 * NFSv4 citizens - we do not indicate to the server to update the file's
2594 * share state even when we are done with one of the three share
2595 * stateid's in the inode.
2596 *
2597 * NOTE: Caller must be holding the sp->so_owner semaphore!
2598 */
1f7977c1 2599int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2600{
4a35bd41 2601 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2602 struct nfs4_closedata *calldata;
b39e625b
TM		 2603 struct nfs4_state_owner *sp = state->owner;
2604 struct rpc_task *task;
5138fde0
TM		 2605 struct rpc_message msg = {
2606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2607 .rpc_cred = state->owner->so_cred,
2608 };
c970aa85
TM		 2609 struct rpc_task_setup task_setup_data = {
2610 .rpc_client = server->client,
5138fde0 2611 .rpc_message = &msg,
c970aa85 2612 .callback_ops = &nfs4_close_ops,
101070ca 2613 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2614 .flags = RPC_TASK_ASYNC,
2615 };
9512135d 2616 int status = -ENOMEM;
1da177e4 2617
8535b2be 2618 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2619 if (calldata == NULL)
9512135d 2620 goto out;
a9c92d6b 2621 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2622 calldata->inode = state->inode;
1da177e4 2623 calldata->state = state;
4a35bd41 2624 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2625 calldata->arg.stateid = &state->open_stateid;
1da177e4 2626 /* Serialization for the sequence id */
8535b2be 2627 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2628 if (calldata->arg.seqid == NULL)
2629 goto out_free_calldata;
dc0b027d 2630 calldata->arg.fmode = 0;
a65318bf 2631 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2632 calldata->res.fattr = &calldata->fattr;
c1d51931 2633 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2634 calldata->res.server = server;
1f7977c1 2635 calldata->roc = pnfs_roc(state->inode);
643168c2 2636 nfs_sb_active(calldata->inode->i_sb);
9512135d 2637
1174dd1f
TM		 2638 msg.rpc_argp = &calldata->arg;
2639 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2640 task_setup_data.callback_data = calldata;
2641 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2642 if (IS_ERR(task))
2643 return PTR_ERR(task);
a49c3c77
TM		 2644 status = 0;
2645 if (wait)
2646 status = rpc_wait_for_completion_task(task);
b39e625b 2647 rpc_put_task(task);
a49c3c77 2648 return status;
9512135d
TM		 2649out_free_calldata:
2650 kfree(calldata);
2651out:
b39e625b
TM		 2652 nfs4_put_open_state(state);
2653 nfs4_put_state_owner(sp);
9512135d 2654 return status;
1da177e4
LT		 2655}
2656
2b484297 2657static struct inode *
cd9a1c0e 2658nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2659{
1da177e4 2660 struct nfs4_state *state;
aa9c2669
DQ		 2661 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2662
2663 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2664
565277f6 2665 /* Protect against concurrent sillydeletes */
959d921f 2666 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2667
2668 nfs4_label_release_security(label);
2669
f46e0bd3
TM		 2670 if (IS_ERR(state))
2671 return ERR_CAST(state);
275bb307 2672 return state->inode;
1da177e4
LT		 2673}
2674
1185a552 2675static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2676{
2677 if (ctx->state == NULL)
2678 return;
2679 if (is_sync)
643168c2 2680 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2681 else
643168c2 2682 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2683}
1da177e4
LT		 2684
2685static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2686{
43652ad5
BH		 2687 struct nfs4_server_caps_arg args = {
2688 .fhandle = fhandle,
2689 };
1da177e4
LT		 2690 struct nfs4_server_caps_res res = {};
2691 struct rpc_message msg = {
2692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2693 .rpc_argp = &args,
1da177e4
LT		 2694 .rpc_resp = &res,
2695 };
2696 int status;
2697
7c513058 2698 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2699 if (status == 0) {
2700 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2701 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2702 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2703 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2704 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2705 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2706 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2707 server->caps |= NFS_CAP_ACLS;
2708 if (res.has_links != 0)
2709 server->caps |= NFS_CAP_HARDLINKS;
2710 if (res.has_symlinks != 0)
2711 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2712 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2713 server->caps |= NFS_CAP_FILEID;
2714 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2715 server->caps |= NFS_CAP_MODE;
2716 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2717 server->caps |= NFS_CAP_NLINK;
2718 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2719 server->caps |= NFS_CAP_OWNER;
2720 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2721 server->caps |= NFS_CAP_OWNER_GROUP;
2722 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2723 server->caps |= NFS_CAP_ATIME;
2724 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2725 server->caps |= NFS_CAP_CTIME;
2726 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2727 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2728#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2729 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2730 server->caps |= NFS_CAP_SECURITY_LABEL;
2731#endif
2732 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2733 sizeof(server->attr_bitmask));
62ab460c 2734
aa9c2669
DQ		 2735 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2736 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2737 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2738 }
a65318bf
TM		 2739 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2740 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2741 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2742 server->acl_bitmask = res.acl_bitmask;
264e6351 2743 server->fh_expire_type = res.fh_expire_type;
1da177e4 2744 }
cccef3b9 2745
1da177e4
LT		 2746 return status;
2747}
2748
55a97593 2749int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2750{
2751 struct nfs4_exception exception = { };
2752 int err;
2753 do {
2754 err = nfs4_handle_exception(server,
2755 _nfs4_server_capabilities(server, fhandle),
2756 &exception);
2757 } while (exception.retry);
2758 return err;
2759}
2760
2761static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2762 struct nfs_fsinfo *info)
2763{
aa9c2669 2764 u32 bitmask[3];
1da177e4 2765 struct nfs4_lookup_root_arg args = {
aa9c2669 2766 .bitmask = bitmask,
1da177e4
LT		 2767 };
2768 struct nfs4_lookup_res res = {
2769 .server = server,
0e574af1 2770 .fattr = info->fattr,
1da177e4
LT		 2771 .fh = fhandle,
2772 };
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2775 .rpc_argp = &args,
2776 .rpc_resp = &res,
2777 };
008f55d0 2778
aa9c2669
DQ		 2779 bitmask[0] = nfs4_fattr_bitmap[0];
2780 bitmask[1] = nfs4_fattr_bitmap[1];
2781 /*
2782 * Process the label in the upcoming getfattr
2783 */
2784 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2785
0e574af1 2786 nfs_fattr_init(info->fattr);
7c513058 2787 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2788}
2789
2790static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2791 struct nfs_fsinfo *info)
2792{
2793 struct nfs4_exception exception = { };
2794 int err;
2795 do {
fb8a5ba8 2796 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2797 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2798 switch (err) {
2799 case 0:
2800 case -NFS4ERR_WRONGSEC:
05e9cfb4 2801 goto out;
fb8a5ba8
BS		 2802 default:
2803 err = nfs4_handle_exception(server, err, &exception);
2804 }
1da177e4 2805 } while (exception.retry);
05e9cfb4 2806out:
1da177e4
LT		 2807 return err;
2808}
2809
8f70e95f
BS		 2810static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2811 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2812{
c2190661
TM		 2813 struct rpc_auth_create_args auth_args = {
2814 .pseudoflavor = flavor,
2815 };
8f70e95f
BS		 2816 struct rpc_auth *auth;
2817 int ret;
2818
c2190661 2819 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2820 if (IS_ERR(auth)) {
75bc8821 2821 ret = -EACCES;
8f70e95f
BS		 2822 goto out;
2823 }
2824 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2825out:
2826 return ret;
2827}
2828
9a744ba3
CL		 2829/*
2830 * Retry pseudoroot lookup with various security flavors. We do this when:
2831 *
2832 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2833 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2834 *
2835 * Returns zero on success, or a negative NFS4ERR value, or a
2836 * negative errno value.
2837 */
801a16dc 2838static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2839 struct nfs_fsinfo *info)
1da177e4 2840{
9a744ba3
CL		 2841 /* Per 3530bis 15.33.5 */
2842 static const rpc_authflavor_t flav_array[] = {
2843 RPC_AUTH_GSS_KRB5P,
2844 RPC_AUTH_GSS_KRB5I,
2845 RPC_AUTH_GSS_KRB5,
c4eafe11 2846 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2847 RPC_AUTH_NULL,
2848 };
2849 int status = -EPERM;
2850 size_t i;
6a1a1e34 2851
9a744ba3 2852 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2853 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2854 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2855 continue;
2856 break;
8f70e95f 2857 }
9a744ba3 2858
fb8a5ba8
BS		 2859 /*
2860 * -EACCESS could mean that the user doesn't have correct permissions
2861 * to access the mount. It could also mean that we tried to mount
2862 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2863 * existing mount programs don't handle -EACCES very well so it should
2864 * be mapped to -EPERM instead.
2865 */
2866 if (status == -EACCES)
2867 status = -EPERM;
801a16dc
BS		 2868 return status;
2869}
2870
2ed4b95b
CL		 2871static int nfs4_do_find_root_sec(struct nfs_server *server,
2872 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2873{
2874 int mv = server->nfs_client->cl_minorversion;
2875 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2876}
2877
2878/**
2879 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2880 * @server: initialized nfs_server handle
2881 * @fhandle: we fill in the pseudo-fs root file handle
2882 * @info: we fill in an FSINFO struct
2883 *
2884 * Returns zero on success, or a negative errno.
801a16dc 2885 */
3028eb2b
BS		 2886int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2887 struct nfs_fsinfo *info)
801a16dc 2888{
2ed4b95b
CL		 2889 int status;
2890
2891 status = nfs4_lookup_root(server, fhandle, info);
2892 if ((status == -NFS4ERR_WRONGSEC) &&
2893 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2894 status = nfs4_do_find_root_sec(server, fhandle, info);
2895
1da177e4
LT		 2896 if (status == 0)
2897 status = nfs4_server_capabilities(server, fhandle);
2898 if (status == 0)
2899 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2900
c12e87f4 2901 return nfs4_map_errors(status);
1da177e4
LT		 2902}
2903
bae36241
BS		 2904static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2905 struct nfs_fsinfo *info)
2906{
2907 int error;
2908 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2909 struct nfs4_label *label = NULL;
bae36241
BS		 2910
2911 error = nfs4_server_capabilities(server, mntfh);
2912 if (error < 0) {
2913 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2914 return error;
2915 }
2916
14c43f76
DQ		 2917 label = nfs4_label_alloc(server, GFP_KERNEL);
2918 if (IS_ERR(label))
2919 return PTR_ERR(label);
2920
1775fd3e 2921 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2922 if (error < 0) {
2923 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2924 goto err_free_label;
bae36241
BS		 2925 }
2926
2927 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2928 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2929 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2930
14c43f76
DQ		 2931err_free_label:
2932 nfs4_label_free(label);
2933
bae36241
BS		 2934 return error;
2935}
2936
6b97fd3d
MN		 2937/*
2938 * Get locations and (maybe) other attributes of a referral.
2939 * Note that we'll actually follow the referral later when
2940 * we detect fsid mismatch in inode revalidation
2941 */
f05d147f
BS		 2942static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2943 const struct qstr *name, struct nfs_fattr *fattr,
2944 struct nfs_fh *fhandle)
6b97fd3d
MN		 2945{
2946 int status = -ENOMEM;
2947 struct page *page = NULL;
2948 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2949
2950 page = alloc_page(GFP_KERNEL);
2951 if (page == NULL)
2952 goto out;
2953 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2954 if (locations == NULL)
2955 goto out;
2956
f05d147f 2957 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2958 if (status != 0)
2959 goto out;
2960 /* Make sure server returned a different fsid for the referral */
2961 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2962 dprintk("%s: server did not return a different fsid for"
2963 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2964 status = -EIO;
2965 goto out;
2966 }
533eb461
AA		 2967 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2968 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2969
533eb461 2970 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2971 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2972 memset(fhandle, 0, sizeof(struct nfs_fh));
2973out:
2974 if (page)
2975 __free_page(page);
5d7ca35a 2976 kfree(locations);
6b97fd3d
MN		 2977 return status;
2978}
2979
1775fd3e
DQ		 2980static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2981 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2982{
2983 struct nfs4_getattr_arg args = {
2984 .fh = fhandle,
2985 .bitmask = server->attr_bitmask,
2986 };
2987 struct nfs4_getattr_res res = {
2988 .fattr = fattr,
1775fd3e 2989 .label = label,
1da177e4
LT		 2990 .server = server,
2991 };
2992 struct rpc_message msg = {
2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2994 .rpc_argp = &args,
2995 .rpc_resp = &res,
2996 };
aa9c2669
DQ		 2997
2998 args.bitmask = nfs4_bitmask(server, label);
2999
0e574af1 3000 nfs_fattr_init(fattr);
7c513058 3001 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3002}
3003
1775fd3e
DQ		 3004static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3005 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3006{
3007 struct nfs4_exception exception = { };
3008 int err;
3009 do {
b5f875a9
TM		 3010 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3011 trace_nfs4_getattr(server, fhandle, fattr, err);
3012 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3013 &exception);
3014 } while (exception.retry);
3015 return err;
3016}
3017
3018/*
3019 * The file is not closed if it is opened due to the a request to change
3020 * the size of the file. The open call will not be needed once the
3021 * VFS layer lookup-intents are implemented.
3022 *
3023 * Close is called when the inode is destroyed.
3024 * If we haven't opened the file for O_WRONLY, we
3025 * need to in the size_change case to obtain a stateid.
3026 *
3027 * Got race?
3028 * Because OPEN is always done by name in nfsv4, it is
3029 * possible that we opened a different file by the same
3030 * name. We can recognize this race condition, but we
3031 * can't do anything about it besides returning an error.
3032 *
3033 * This will be fixed with VFS changes (lookup-intent).
3034 */
3035static int
3036nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3037 struct iattr *sattr)
3038{
08e9eac4 3039 struct inode *inode = dentry->d_inode;
659bfcd6 3040 struct rpc_cred *cred = NULL;
d530838b 3041 struct nfs4_state *state = NULL;
14c43f76 3042 struct nfs4_label *label = NULL;
1da177e4
LT		 3043 int status;
3044
8a1636c4 3045 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3046 pnfs_commit_and_return_layout(inode);
8a1636c4 3047
0e574af1 3048 nfs_fattr_init(fattr);
1da177e4 3049
2669940d
AA		 3050 /* Deal with open(O_TRUNC) */
3051 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3052 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3053
3054 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3055 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3056 return 0;
3057
d530838b 3058 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3059 if (sattr->ia_valid & ATTR_FILE) {
3060 struct nfs_open_context *ctx;
3061
3062 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3063 if (ctx) {
3064 cred = ctx->cred;
3065 state = ctx->state;
3066 }
659bfcd6 3067 }
08e9eac4 3068
14c43f76
DQ		 3069 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3070 if (IS_ERR(label))
3071 return PTR_ERR(label);
3072
3073 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3074 if (status == 0) {
65e4308d 3075 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3076 nfs_setsecurity(inode, fattr, label);
3077 }
14c43f76 3078 nfs4_label_free(label);
1da177e4
LT		 3079 return status;
3080}
3081
0c2e53f1
TM		 3082static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3083 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3084 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3085{
0c2e53f1 3086 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3087 int status;
3088 struct nfs4_lookup_arg args = {
3089 .bitmask = server->attr_bitmask,
0c2e53f1 3090 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3091 .name = name,
3092 };
3093 struct nfs4_lookup_res res = {
3094 .server = server,
3095 .fattr = fattr,
aa9c2669 3096 .label = label,
2b3de441
DH		 3097 .fh = fhandle,
3098 };
3099 struct rpc_message msg = {
3100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3101 .rpc_argp = &args,
3102 .rpc_resp = &res,
3103 };
3104
aa9c2669
DQ		 3105 args.bitmask = nfs4_bitmask(server, label);
3106
2b3de441
DH		 3107 nfs_fattr_init(fattr);
3108
1da177e4 3109 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3110 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3111 dprintk("NFS reply lookup: %d\n", status);
3112 return status;
3113}
3114
72de53ec 3115static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3116{
7ebb9315 3117 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3118 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3119 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3120 fattr->nlink = 2;
3121}
3122
72de53ec
BS		 3123static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3124 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3125 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3126{
3127 struct nfs4_exception exception = { };
72de53ec 3128 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3129 int err;
3130 do {
1775fd3e 3131 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3132 trace_nfs4_lookup(dir, name, err);
72de53ec 3133 switch (err) {
08ef7bd3 3134 case -NFS4ERR_BADNAME:
72de53ec
BS		 3135 err = -ENOENT;
3136 goto out;
0c2e53f1 3137 case -NFS4ERR_MOVED:
f05d147f 3138 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3139 goto out;
0c2e53f1 3140 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3141 err = -EPERM;
3142 if (client != *clnt)
3143 goto out;
3144
3145 client = nfs4_create_sec_client(client, dir, name);
3146 if (IS_ERR(client))
3147 return PTR_ERR(client);
3148
3149 exception.retry = 1;
3150 break;
3151 default:
3152 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3153 }
1da177e4 3154 } while (exception.retry);
72de53ec
BS		 3155
3156out:
3157 if (err == 0)
3158 *clnt = client;
3159 else if (client != *clnt)
3160 rpc_shutdown_client(client);
3161
1da177e4
LT		 3162 return err;
3163}
3164
80a16b21 3165static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3166 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3167 struct nfs4_label *label)
72de53ec
BS		 3168{
3169 int status;
3170 struct rpc_clnt *client = NFS_CLIENT(dir);
3171
1775fd3e 3172 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3173 if (client != NFS_CLIENT(dir)) {
3174 rpc_shutdown_client(client);
3175 nfs_fixup_secinfo_attributes(fattr);
3176 }
3177 return status;
3178}
3179
f05d147f
BS		 3180struct rpc_clnt *
3181nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3182 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3183{
3184 int status;
3185 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3186
1775fd3e 3187 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3188 if (status < 0) {
3189 rpc_shutdown_client(client);
3190 return ERR_PTR(status);
3191 }
3192 return client;
3193}
3194
1da177e4
LT		 3195static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3196{
76b32999 3197 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3198 struct nfs4_accessargs args = {
3199 .fh = NFS_FH(inode),
a4980e78 3200 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3201 };
3202 struct nfs4_accessres res = {
3203 .server = server,
1da177e4 3204 };
1da177e4
LT		 3205 struct rpc_message msg = {
3206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3207 .rpc_argp = &args,
3208 .rpc_resp = &res,
3209 .rpc_cred = entry->cred,
3210 };
3211 int mode = entry->mask;
aa9c2669 3212 int status = 0;
1da177e4
LT		 3213
3214 /*
3215 * Determine which access bits we want to ask for...
3216 */
3217 if (mode & MAY_READ)
3218 args.access |= NFS4_ACCESS_READ;
3219 if (S_ISDIR(inode->i_mode)) {
3220 if (mode & MAY_WRITE)
3221 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3222 if (mode & MAY_EXEC)
3223 args.access |= NFS4_ACCESS_LOOKUP;
3224 } else {
3225 if (mode & MAY_WRITE)
3226 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3227 if (mode & MAY_EXEC)
3228 args.access |= NFS4_ACCESS_EXECUTE;
3229 }
c407d41a
TM		 3230
3231 res.fattr = nfs_alloc_fattr();
3232 if (res.fattr == NULL)
3233 return -ENOMEM;
3234
7c513058 3235 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3236 if (!status) {
6168f62c 3237 nfs_access_set_mask(entry, res.access);
c407d41a 3238 nfs_refresh_inode(inode, res.fattr);
1da177e4 3239 }
c407d41a 3240 nfs_free_fattr(res.fattr);
1da177e4
LT		 3241 return status;
3242}
3243
3244static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3245{
3246 struct nfs4_exception exception = { };
3247 int err;
3248 do {
c1578b76
TM		 3249 err = _nfs4_proc_access(inode, entry);
3250 trace_nfs4_access(inode, err);
3251 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3252 &exception);
3253 } while (exception.retry);
3254 return err;
3255}
3256
3257/*
3258 * TODO: For the time being, we don't try to get any attributes
3259 * along with any of the zero-copy operations READ, READDIR,
3260 * READLINK, WRITE.
3261 *
3262 * In the case of the first three, we want to put the GETATTR
3263 * after the read-type operation -- this is because it is hard
3264 * to predict the length of a GETATTR response in v4, and thus
3265 * align the READ data correctly. This means that the GETATTR
3266 * may end up partially falling into the page cache, and we should
3267 * shift it into the 'tail' of the xdr_buf before processing.
3268 * To do this efficiently, we need to know the total length
3269 * of data received, which doesn't seem to be available outside
3270 * of the RPC layer.
3271 *
3272 * In the case of WRITE, we also want to put the GETATTR after
3273 * the operation -- in this case because we want to make sure
140150db 3274 * we get the post-operation mtime and size.
1da177e4
LT		 3275 *
3276 * Both of these changes to the XDR layer would in fact be quite
3277 * minor, but I decided to leave them for a subsequent patch.
3278 */
3279static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3280 unsigned int pgbase, unsigned int pglen)
3281{
3282 struct nfs4_readlink args = {
3283 .fh = NFS_FH(inode),
3284 .pgbase = pgbase,
3285 .pglen = pglen,
3286 .pages = &page,
3287 };
f50c7000 3288 struct nfs4_readlink_res res;
1da177e4
LT		 3289 struct rpc_message msg = {
3290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3291 .rpc_argp = &args,
f50c7000 3292 .rpc_resp = &res,
1da177e4
LT		 3293 };
3294
7c513058 3295 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3296}
3297
3298static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3299 unsigned int pgbase, unsigned int pglen)
3300{
3301 struct nfs4_exception exception = { };
3302 int err;
3303 do {
c1578b76
TM		 3304 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3305 trace_nfs4_readlink(inode, err);
3306 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3307 &exception);
3308 } while (exception.retry);
3309 return err;
3310}
3311
1da177e4 3312/*
8867fe58 3313 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3314 */
1da177e4
LT		 3315static int
3316nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3317 int flags)
1da177e4 3318{
aa9c2669 3319 struct nfs4_label l, *ilabel = NULL;
8867fe58 3320 struct nfs_open_context *ctx;
1da177e4 3321 struct nfs4_state *state;
1da177e4
LT		 3322 int status = 0;
3323
8867fe58
MS		 3324 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3325 if (IS_ERR(ctx))
3326 return PTR_ERR(ctx);
3327
aa9c2669
DQ		 3328 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3329
a8a5da99 3330 sattr->ia_mode &= ~current_umask();
959d921f 3331 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3332 if (IS_ERR(state)) {
3333 status = PTR_ERR(state);
c0204fd2 3334 goto out;
1da177e4 3335 }
1da177e4 3336out:
aa9c2669 3337 nfs4_label_release_security(ilabel);
8867fe58 3338 put_nfs_open_context(ctx);
1da177e4
LT		 3339 return status;
3340}
3341
3342static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3343{
16e42959 3344 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3345 struct nfs_removeargs args = {
1da177e4 3346 .fh = NFS_FH(dir),
26fe5750 3347 .name = *name,
16e42959 3348 };
4fdc17b2 3349 struct nfs_removeres res = {
16e42959 3350 .server = server,
1da177e4 3351 };
1da177e4 3352 struct rpc_message msg = {
4fdc17b2
TM		 3353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3354 .rpc_argp = &args,
3355 .rpc_resp = &res,
1da177e4 3356 };
778d2817 3357 int status;
1da177e4 3358
7c513058 3359 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3360 if (status == 0)
16e42959 3361 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3362 return status;
3363}
3364
3365static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3366{
3367 struct nfs4_exception exception = { };
3368 int err;
3369 do {
078ea3df
TM		 3370 err = _nfs4_proc_remove(dir, name);
3371 trace_nfs4_remove(dir, name, err);
3372 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3373 &exception);
3374 } while (exception.retry);
3375 return err;
3376}
3377
e4eff1a6 3378static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3379{
e4eff1a6
TM		 3380 struct nfs_server *server = NFS_SERVER(dir);
3381 struct nfs_removeargs *args = msg->rpc_argp;
3382 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3383
e4eff1a6 3384 res->server = server;
1da177e4 3385 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3386 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3387
3388 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3389}
3390
34e137cc
BS		 3391static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3392{
d9afbd1b
TM		 3393 nfs4_setup_sequence(NFS_SERVER(data->dir),
3394 &data->args.seq_args,
3395 &data->res.seq_res,
3396 task);
1da177e4
LT		 3397}
3398
e4eff1a6 3399static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3400{
078ea3df
TM		 3401 struct nfs_unlinkdata *data = task->tk_calldata;
3402 struct nfs_removeres *res = &data->res;
e4eff1a6 3403
14516c3a
TM		 3404 if (!nfs4_sequence_done(task, &res->seq_res))
3405 return 0;
9e33bed5 3406 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3407 return 0;
3408 update_changeattr(dir, &res->cinfo);
e4eff1a6 3409 return 1;
1da177e4
LT		 3410}
3411
d3d4152a
JL		 3412static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3413{
3414 struct nfs_server *server = NFS_SERVER(dir);
3415 struct nfs_renameargs *arg = msg->rpc_argp;
3416 struct nfs_renameres *res = msg->rpc_resp;
3417
3418 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3419 res->server = server;
a9c92d6b 3420 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3421}
3422
c6bfa1a1
BS		 3423static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3424{
d9afbd1b
TM		 3425 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3426 &data->args.seq_args,
3427 &data->res.seq_res,
3428 task);
d3d4152a
JL		 3429}
3430
3431static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3432 struct inode *new_dir)
3433{
fbc6f7c2
TM		 3434 struct nfs_renamedata *data = task->tk_calldata;
3435 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3436
3437 if (!nfs4_sequence_done(task, &res->seq_res))
3438 return 0;
3439 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3440 return 0;
3441
3442 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3443 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3444 return 1;
3445}
3446
1da177e4
LT		 3447static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3448 struct inode *new_dir, struct qstr *new_name)
3449{
6caf2c82 3450 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3451 struct nfs_renameargs arg = {
1da177e4
LT		 3452 .old_dir = NFS_FH(old_dir),
3453 .new_dir = NFS_FH(new_dir),
3454 .old_name = old_name,
3455 .new_name = new_name,
6caf2c82 3456 };
e8582a8b 3457 struct nfs_renameres res = {
6caf2c82 3458 .server = server,
1da177e4 3459 };
1da177e4
LT		 3460 struct rpc_message msg = {
3461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3462 .rpc_argp = &arg,
3463 .rpc_resp = &res,
3464 };
011fff72 3465 int status = -ENOMEM;
14c43f76 3466
7c513058 3467 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3468 if (!status) {
3469 update_changeattr(old_dir, &res.old_cinfo);
3470 update_changeattr(new_dir, &res.new_cinfo);
3471 }
3472 return status;
3473}
3474
3475static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3476 struct inode *new_dir, struct qstr *new_name)
3477{
3478 struct nfs4_exception exception = { };
3479 int err;
3480 do {
fbc6f7c2
TM		 3481 err = _nfs4_proc_rename(old_dir, old_name,
3482 new_dir, new_name);
3483 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3484 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
3490static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3491{
91ba2eee 3492 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3493 struct nfs4_link_arg arg = {
3494 .fh = NFS_FH(inode),
3495 .dir_fh = NFS_FH(dir),
3496 .name = name,
91ba2eee
TM		 3497 .bitmask = server->attr_bitmask,
3498 };
91ba2eee
TM		 3499 struct nfs4_link_res res = {
3500 .server = server,
1775fd3e 3501 .label = NULL,
1da177e4 3502 };
1da177e4
LT		 3503 struct rpc_message msg = {
3504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3505 .rpc_argp = &arg,
91ba2eee 3506 .rpc_resp = &res,
1da177e4 3507 };
136f2627
TM		 3508 int status = -ENOMEM;
3509
3510 res.fattr = nfs_alloc_fattr();
778d2817 3511 if (res.fattr == NULL)
136f2627 3512 goto out;
1da177e4 3513
14c43f76
DQ		 3514 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3515 if (IS_ERR(res.label)) {
3516 status = PTR_ERR(res.label);
3517 goto out;
3518 }
aa9c2669 3519 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3520
7c513058 3521 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3522 if (!status) {
3523 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3524 status = nfs_post_op_update_inode(inode, res.fattr);
3525 if (!status)
3526 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3527 }
14c43f76
DQ		 3528
3529
3530 nfs4_label_free(res.label);
3531
136f2627 3532out:
136f2627 3533 nfs_free_fattr(res.fattr);
1da177e4
LT		 3534 return status;
3535}
3536
3537static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3538{
3539 struct nfs4_exception exception = { };
3540 int err;
3541 do {
3542 err = nfs4_handle_exception(NFS_SERVER(inode),
3543 _nfs4_proc_link(inode, dir, name),
3544 &exception);
3545 } while (exception.retry);
3546 return err;
3547}
3548
57dc9a57
TM		 3549struct nfs4_createdata {
3550 struct rpc_message msg;
3551 struct nfs4_create_arg arg;
3552 struct nfs4_create_res res;
3553 struct nfs_fh fh;
3554 struct nfs_fattr fattr;
1775fd3e 3555 struct nfs4_label *label;
57dc9a57
TM		 3556};
3557
3558static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3559 struct qstr *name, struct iattr *sattr, u32 ftype)
3560{
3561 struct nfs4_createdata *data;
3562
3563 data = kzalloc(sizeof(*data), GFP_KERNEL);
3564 if (data != NULL) {
3565 struct nfs_server *server = NFS_SERVER(dir);
3566
14c43f76
DQ		 3567 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3568 if (IS_ERR(data->label))
3569 goto out_free;
3570
57dc9a57
TM		 3571 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3572 data->msg.rpc_argp = &data->arg;
3573 data->msg.rpc_resp = &data->res;
3574 data->arg.dir_fh = NFS_FH(dir);
3575 data->arg.server = server;
3576 data->arg.name = name;
3577 data->arg.attrs = sattr;
3578 data->arg.ftype = ftype;
aa9c2669 3579 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3580 data->res.server = server;
3581 data->res.fh = &data->fh;
3582 data->res.fattr = &data->fattr;
1775fd3e 3583 data->res.label = data->label;
57dc9a57 3584 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3585 }
3586 return data;
14c43f76
DQ		 3587out_free:
3588 kfree(data);
3589 return NULL;
57dc9a57
TM		 3590}
3591
3592static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3593{
7c513058 3594 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3595 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3596 if (status == 0) {
3597 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3598 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3599 }
3600 return status;
3601}
3602
3603static void nfs4_free_createdata(struct nfs4_createdata *data)
3604{
14c43f76 3605 nfs4_label_free(data->label);
57dc9a57
TM		 3606 kfree(data);
3607}
3608
4f390c15 3609static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3610 struct page *page, unsigned int len, struct iattr *sattr,
3611 struct nfs4_label *label)
1da177e4 3612{
57dc9a57
TM		 3613 struct nfs4_createdata *data;
3614 int status = -ENAMETOOLONG;
1da177e4 3615
94a6d753 3616 if (len > NFS4_MAXPATHLEN)
57dc9a57 3617 goto out;
4f390c15 3618
57dc9a57
TM		 3619 status = -ENOMEM;
3620 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3621 if (data == NULL)
3622 goto out;
3623
3624 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3625 data->arg.u.symlink.pages = &page;
3626 data->arg.u.symlink.len = len;
1775fd3e 3627 data->arg.label = label;
1da177e4 3628
57dc9a57
TM		 3629 status = nfs4_do_create(dir, dentry, data);
3630
3631 nfs4_free_createdata(data);
3632out:
1da177e4
LT		 3633 return status;
3634}
3635
4f390c15 3636static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3637 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3638{
3639 struct nfs4_exception exception = { };
aa9c2669 3640 struct nfs4_label l, *label = NULL;
1da177e4 3641 int err;
aa9c2669
DQ		 3642
3643 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3644
1da177e4 3645 do {
078ea3df
TM		 3646 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3647 trace_nfs4_symlink(dir, &dentry->d_name, err);
3648 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3649 &exception);
3650 } while (exception.retry);
aa9c2669
DQ		 3651
3652 nfs4_label_release_security(label);
1da177e4
LT		 3653 return err;
3654}
3655
3656static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3657 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3658{
57dc9a57
TM		 3659 struct nfs4_createdata *data;
3660 int status = -ENOMEM;
1da177e4 3661
57dc9a57
TM		 3662 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3663 if (data == NULL)
3664 goto out;
3665
1775fd3e 3666 data->arg.label = label;
57dc9a57
TM		 3667 status = nfs4_do_create(dir, dentry, data);
3668
3669 nfs4_free_createdata(data);
3670out:
1da177e4
LT		 3671 return status;
3672}
3673
3674static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3675 struct iattr *sattr)
3676{
3677 struct nfs4_exception exception = { };
aa9c2669 3678 struct nfs4_label l, *label = NULL;
1da177e4 3679 int err;
a8a5da99 3680
aa9c2669
DQ		 3681 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3682
a8a5da99 3683 sattr->ia_mode &= ~current_umask();
1da177e4 3684 do {
078ea3df
TM		 3685 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3686 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3687 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3688 &exception);
3689 } while (exception.retry);
aa9c2669
DQ		 3690 nfs4_label_release_security(label);
3691
1da177e4
LT		 3692 return err;
3693}
3694
3695static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3696 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3697{
3698 struct inode *dir = dentry->d_inode;
3699 struct nfs4_readdir_arg args = {
3700 .fh = NFS_FH(dir),
56e4ebf8 3701 .pages = pages,
1da177e4
LT		 3702 .pgbase = 0,
3703 .count = count,
96d25e53 3704 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3705 .plus = plus,
1da177e4
LT		 3706 };
3707 struct nfs4_readdir_res res;
3708 struct rpc_message msg = {
3709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3710 .rpc_argp = &args,
3711 .rpc_resp = &res,
3712 .rpc_cred = cred,
3713 };
3714 int status;
3715
3110ff80 3716 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3717 dentry->d_parent->d_name.name,
3718 dentry->d_name.name,
3719 (unsigned long long)cookie);
c3f52af3 3720 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3721 res.pgbase = args.pgbase;
7c513058 3722 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3723 if (status >= 0) {
c3f52af3 3724 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3725 status += args.pgbase;
3726 }
c4812998
TM		 3727
3728 nfs_invalidate_atime(dir);
3729
3110ff80 3730 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3731 return status;
3732}
3733
3734static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3735 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3736{
3737 struct nfs4_exception exception = { };
3738 int err;
3739 do {
c1578b76
TM		 3740 err = _nfs4_proc_readdir(dentry, cred, cookie,
3741 pages, count, plus);
3742 trace_nfs4_readdir(dentry->d_inode, err);
3743 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3744 &exception);
3745 } while (exception.retry);
3746 return err;
3747}
3748
3749static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3750 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3751{
57dc9a57
TM		 3752 struct nfs4_createdata *data;
3753 int mode = sattr->ia_mode;
3754 int status = -ENOMEM;
1da177e4 3755
57dc9a57
TM		 3756 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3757 if (data == NULL)
3758 goto out;
3759
1da177e4 3760 if (S_ISFIFO(mode))
57dc9a57 3761 data->arg.ftype = NF4FIFO;
1da177e4 3762 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3763 data->arg.ftype = NF4BLK;
3764 data->arg.u.device.specdata1 = MAJOR(rdev);
3765 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3766 }
3767 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3768 data->arg.ftype = NF4CHR;
3769 data->arg.u.device.specdata1 = MAJOR(rdev);
3770 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3771 } else if (!S_ISSOCK(mode)) {
3772 status = -EINVAL;
3773 goto out_free;
1da177e4 3774 }
1775fd3e 3775
aa9c2669 3776 data->arg.label = label;
57dc9a57 3777 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3778out_free:
57dc9a57
TM		 3779 nfs4_free_createdata(data);
3780out:
1da177e4
LT		 3781 return status;
3782}
3783
3784static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3785 struct iattr *sattr, dev_t rdev)
3786{
3787 struct nfs4_exception exception = { };
aa9c2669 3788 struct nfs4_label l, *label = NULL;
1da177e4 3789 int err;
a8a5da99 3790
aa9c2669
DQ		 3791 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3792
a8a5da99 3793 sattr->ia_mode &= ~current_umask();
1da177e4 3794 do {
078ea3df
TM		 3795 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3796 trace_nfs4_mknod(dir, &dentry->d_name, err);
3797 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3798 &exception);
3799 } while (exception.retry);
aa9c2669
DQ		 3800
3801 nfs4_label_release_security(label);
3802
1da177e4
LT		 3803 return err;
3804}
3805
3806static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3807 struct nfs_fsstat *fsstat)
3808{
3809 struct nfs4_statfs_arg args = {
3810 .fh = fhandle,
3811 .bitmask = server->attr_bitmask,
3812 };
24ad148a
BH		 3813 struct nfs4_statfs_res res = {
3814 .fsstat = fsstat,
3815 };
1da177e4
LT		 3816 struct rpc_message msg = {
3817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3818 .rpc_argp = &args,
24ad148a 3819 .rpc_resp = &res,
1da177e4
LT		 3820 };
3821
0e574af1 3822 nfs_fattr_init(fsstat->fattr);
7c513058 3823 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3824}
3825
3826static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3827{
3828 struct nfs4_exception exception = { };
3829 int err;
3830 do {
3831 err = nfs4_handle_exception(server,
3832 _nfs4_proc_statfs(server, fhandle, fsstat),
3833 &exception);
3834 } while (exception.retry);
3835 return err;
3836}
3837
3838static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3839 struct nfs_fsinfo *fsinfo)
3840{
3841 struct nfs4_fsinfo_arg args = {
3842 .fh = fhandle,
3843 .bitmask = server->attr_bitmask,
3844 };
3dda5e43
BH		 3845 struct nfs4_fsinfo_res res = {
3846 .fsinfo = fsinfo,
3847 };
1da177e4
LT		 3848 struct rpc_message msg = {
3849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3850 .rpc_argp = &args,
3dda5e43 3851 .rpc_resp = &res,
1da177e4
LT		 3852 };
3853
7c513058 3854 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3855}
3856
3857static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3858{
3859 struct nfs4_exception exception = { };
83ca7f5a 3860 unsigned long now = jiffies;
1da177e4
LT		 3861 int err;
3862
3863 do {
83ca7f5a 3864 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3865 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3866 if (err == 0) {
3867 struct nfs_client *clp = server->nfs_client;
3868
3869 spin_lock(&clp->cl_lock);
3870 clp->cl_lease_time = fsinfo->lease_time * HZ;
3871 clp->cl_last_renewal = now;
3872 spin_unlock(&clp->cl_lock);
3873 break;
3874 }
3875 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3876 } while (exception.retry);
3877 return err;
3878}
3879
3880static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3881{
e38eb650
BS		 3882 int error;
3883
0e574af1 3884 nfs_fattr_init(fsinfo->fattr);
e38eb650 3885 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3886 if (error == 0) {
3887 /* block layout checks this! */
3888 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3889 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3890 }
e38eb650
BS		 3891
3892 return error;
1da177e4
LT		 3893}
3894
3895static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3896 struct nfs_pathconf *pathconf)
3897{
3898 struct nfs4_pathconf_arg args = {
3899 .fh = fhandle,
3900 .bitmask = server->attr_bitmask,
3901 };
d45b2989
BH		 3902 struct nfs4_pathconf_res res = {
3903 .pathconf = pathconf,
3904 };
1da177e4
LT		 3905 struct rpc_message msg = {
3906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3907 .rpc_argp = &args,
d45b2989 3908 .rpc_resp = &res,
1da177e4
LT		 3909 };
3910
3911 /* None of the pathconf attributes are mandatory to implement */
3912 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3913 memset(pathconf, 0, sizeof(*pathconf));
3914 return 0;
3915 }
3916
0e574af1 3917 nfs_fattr_init(pathconf->fattr);
7c513058 3918 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3919}
3920
3921static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3922 struct nfs_pathconf *pathconf)
3923{
3924 struct nfs4_exception exception = { };
3925 int err;
3926
3927 do {
3928 err = nfs4_handle_exception(server,
3929 _nfs4_proc_pathconf(server, fhandle, pathconf),
3930 &exception);
3931 } while (exception.retry);
3932 return err;
3933}
3934
5521abfd 3935int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3936 const struct nfs_open_context *ctx,
3937 const struct nfs_lock_context *l_ctx,
3938 fmode_t fmode)
3939{
3940 const struct nfs_lockowner *lockowner = NULL;
3941
3942 if (l_ctx != NULL)
3943 lockowner = &l_ctx->lockowner;
5521abfd 3944 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3945}
3946EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3947
5521abfd
TM		 3948static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3949 const struct nfs_open_context *ctx,
3950 const struct nfs_lock_context *l_ctx,
3951 fmode_t fmode)
3952{
3953 nfs4_stateid current_stateid;
3954
3955 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3956 return false;
3957 return nfs4_stateid_match(stateid, &current_stateid);
3958}
3959
3960static bool nfs4_error_stateid_expired(int err)
3961{
3962 switch (err) {
3963 case -NFS4ERR_DELEG_REVOKED:
3964 case -NFS4ERR_ADMIN_REVOKED:
3965 case -NFS4ERR_BAD_STATEID:
3966 case -NFS4ERR_STALE_STATEID:
3967 case -NFS4ERR_OLD_STATEID:
3968 case -NFS4ERR_OPENMODE:
3969 case -NFS4ERR_EXPIRED:
3970 return true;
3971 }
3972 return false;
3973}
3974
d20581aa
BH		 3975void __nfs4_read_done_cb(struct nfs_read_data *data)
3976{
cd841605 3977 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3978}
3979
cbdabc7f 3980static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3981{
cd841605 3982 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3983
cc668ab3 3984 trace_nfs4_read(data, task->tk_status);
9e33bed5 3985 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3986 rpc_restart_call_prepare(task);
ec06c096 3987 return -EAGAIN;
1da177e4 3988 }
8850df99 3989
d20581aa 3990 __nfs4_read_done_cb(data);
1da177e4 3991 if (task->tk_status > 0)
ec06c096
TM		 3992 renew_lease(server, data->timestamp);
3993 return 0;
1da177e4
LT		 3994}
3995
5521abfd
TM		 3996static bool nfs4_read_stateid_changed(struct rpc_task *task,
3997 struct nfs_readargs *args)
3998{
3999
4000 if (!nfs4_error_stateid_expired(task->tk_status) ||
4001 nfs4_stateid_is_current(&args->stateid,
4002 args->context,
4003 args->lock_context,
4004 FMODE_READ))
4005 return false;
4006 rpc_restart_call_prepare(task);
4007 return true;
4008}
4009
cbdabc7f
AA		 4010static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4011{
4012
4013 dprintk("--> %s\n", __func__);
4014
4015 if (!nfs4_sequence_done(task, &data->res.seq_res))
4016 return -EAGAIN;
5521abfd
TM		 4017 if (nfs4_read_stateid_changed(task, &data->args))
4018 return -EAGAIN;
d20581aa
BH		 4019 return data->read_done_cb ? data->read_done_cb(task, data) :
4020 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4021}
4022
bdc7f021 4023static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4024{
1da177e4 4025 data->timestamp = jiffies;
cbdabc7f 4026 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4027 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4028 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4029}
4030
ef1820f9 4031static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4032{
9b206149 4033 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4034 &data->args.seq_args,
4035 &data->res.seq_res,
9b206149 4036 task))
ef1820f9
N		 4037 return 0;
4038 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4039 data->args.lock_context, FMODE_READ) == -EIO)
4040 return -EIO;
4041 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4042 return -EIO;
4043 return 0;
1da177e4
LT		 4044}
4045
b029bc9b 4046static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4047{
cd841605 4048 struct inode *inode = data->header->inode;
1da177e4 4049
cc668ab3 4050 trace_nfs4_write(data, task->tk_status);
9e33bed5 4051 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4052 rpc_restart_call_prepare(task);
788e7a89 4053 return -EAGAIN;
1da177e4 4054 }
4f9838c7 4055 if (task->tk_status >= 0) {
1da177e4 4056 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4057 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4058 }
788e7a89 4059 return 0;
1da177e4
LT		 4060}
4061
5521abfd
TM		 4062static bool nfs4_write_stateid_changed(struct rpc_task *task,
4063 struct nfs_writeargs *args)
4064{
4065
4066 if (!nfs4_error_stateid_expired(task->tk_status) ||
4067 nfs4_stateid_is_current(&args->stateid,
4068 args->context,
4069 args->lock_context,
4070 FMODE_WRITE))
4071 return false;
4072 rpc_restart_call_prepare(task);
4073 return true;
4074}
4075
b029bc9b
FI		 4076static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4077{
4078 if (!nfs4_sequence_done(task, &data->res.seq_res))
4079 return -EAGAIN;
5521abfd
TM		 4080 if (nfs4_write_stateid_changed(task, &data->args))
4081 return -EAGAIN;
d20581aa
BH		 4082 return data->write_done_cb ? data->write_done_cb(task, data) :
4083 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4084}
4085
5a37f851
TM		 4086static
4087bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4088{
5a37f851
TM		 4089 const struct nfs_pgio_header *hdr = data->header;
4090
4091 /* Don't request attributes for pNFS or O_DIRECT writes */
4092 if (data->ds_clp != NULL || hdr->dreq != NULL)
4093 return false;
4094 /* Otherwise, request attributes if and only if we don't hold
4095 * a delegation
4096 */
011e2a7f 4097 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4098}
a69aef14 4099
bdc7f021 4100static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4101{
cd841605 4102 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4103
5a37f851 4104 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4105 data->args.bitmask = NULL;
4106 data->res.fattr = NULL;
4107 } else
4108 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4109
b029bc9b
FI		 4110 if (!data->write_done_cb)
4111 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4112 data->res.server = server;
1da177e4
LT		 4113 data->timestamp = jiffies;
4114
bdc7f021 4115 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4116 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4117}
4118
ef1820f9 4119static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4120{
9b206149 4121 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4122 &data->args.seq_args,
4123 &data->res.seq_res,
9b206149 4124 task))
ef1820f9
N		 4125 return 0;
4126 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4127 data->args.lock_context, FMODE_WRITE) == -EIO)
4128 return -EIO;
4129 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4130 return -EIO;
4131 return 0;
1da177e4
LT		 4132}
4133
0b7c0153 4134static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4135{
d9afbd1b
TM		 4136 nfs4_setup_sequence(NFS_SERVER(data->inode),
4137 &data->args.seq_args,
4138 &data->res.seq_res,
4139 task);
1da177e4
LT		 4140}
4141
0b7c0153 4142static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4143{
1da177e4 4144 struct inode *inode = data->inode;
14516c3a 4145
cc668ab3 4146 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4147 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4148 rpc_restart_call_prepare(task);
788e7a89 4149 return -EAGAIN;
1da177e4 4150 }
788e7a89 4151 return 0;
1da177e4
LT		 4152}
4153
0b7c0153 4154static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4155{
4156 if (!nfs4_sequence_done(task, &data->res.seq_res))
4157 return -EAGAIN;
0b7c0153 4158 return data->commit_done_cb(task, data);
5f452431
FI		 4159}
4160
0b7c0153 4161static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4162{
788e7a89 4163 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4164
0b7c0153
FI		 4165 if (data->commit_done_cb == NULL)
4166 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4167 data->res.server = server;
bdc7f021 4168 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4169 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4170}
4171
9bc4e3ca
CL		 4172struct nfs4_renewdata {
4173 struct nfs_client *client;
4174 unsigned long timestamp;
4175};
4176
1da177e4
LT		 4177/*
4178 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4179 * standalone procedure for queueing an asynchronous RENEW.
4180 */
9bc4e3ca 4181static void nfs4_renew_release(void *calldata)
dc96aef9 4182{
9bc4e3ca
CL		 4183 struct nfs4_renewdata *data = calldata;
4184 struct nfs_client *clp = data->client;
dc96aef9 4185
0851de06
AB		 4186 if (atomic_read(&clp->cl_count) > 1)
4187 nfs4_schedule_state_renewal(clp);
4188 nfs_put_client(clp);
9bc4e3ca 4189 kfree(data);
dc96aef9
AB		 4190}
4191
9bc4e3ca 4192static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4193{
9bc4e3ca
CL		 4194 struct nfs4_renewdata *data = calldata;
4195 struct nfs_client *clp = data->client;
4196 unsigned long timestamp = data->timestamp;
1da177e4 4197
c6d01c6f 4198 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4199 if (task->tk_status < 0) {
95baa25c 4200 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4201 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4202 return;
4203 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4204 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4205 return;
4206 }
4207 nfs4_schedule_path_down_recovery(clp);
1da177e4 4208 }
452e9352 4209 do_renew_lease(clp, timestamp);
1da177e4
LT		 4210}
4211
963d8fe5
TM		 4212static const struct rpc_call_ops nfs4_renew_ops = {
4213 .rpc_call_done = nfs4_renew_done,
dc96aef9 4214 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4215};
4216
2f60ea6b 4217static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4218{
4219 struct rpc_message msg = {
4220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4221 .rpc_argp = clp,
b4454fe1 4222 .rpc_cred = cred,
1da177e4 4223 };
9bc4e3ca 4224 struct nfs4_renewdata *data;
1da177e4 4225
2f60ea6b
TM		 4226 if (renew_flags == 0)
4227 return 0;
0851de06
AB		 4228 if (!atomic_inc_not_zero(&clp->cl_count))
4229 return -EIO;
b569ad34 4230 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4231 if (data == NULL)
4232 return -ENOMEM;
4233 data->client = clp;
4234 data->timestamp = jiffies;
bc7a05ca 4235 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4236 &nfs4_renew_ops, data);
1da177e4
LT		 4237}
4238
8534d4ec 4239static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4240{
4241 struct rpc_message msg = {
4242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4243 .rpc_argp = clp,
b4454fe1 4244 .rpc_cred = cred,
1da177e4
LT		 4245 };
4246 unsigned long now = jiffies;
4247 int status;
4248
bc7a05ca 4249 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4250 if (status < 0)
4251 return status;
452e9352 4252 do_renew_lease(clp, now);
1da177e4
LT		 4253 return 0;
4254}
4255
aa1870af
BF		 4256static inline int nfs4_server_supports_acls(struct nfs_server *server)
4257{
4258 return (server->caps & NFS_CAP_ACLS)
4259 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4260 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4261}
4262
21f498c2
TM		 4263/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4264 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4265 * the stack.
4266 */
21f498c2 4267#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4268
e9e3d724
NH		 4269static int buf_to_pages_noslab(const void *buf, size_t buflen,
4270 struct page **pages, unsigned int *pgbase)
4271{
4272 struct page *newpage, **spages;
4273 int rc = 0;
4274 size_t len;
4275 spages = pages;
4276
4277 do {
21f498c2 4278 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4279 newpage = alloc_page(GFP_KERNEL);
4280
4281 if (newpage == NULL)
4282 goto unwind;
4283 memcpy(page_address(newpage), buf, len);
4284 buf += len;
4285 buflen -= len;
4286 *pages++ = newpage;
4287 rc++;
4288 } while (buflen != 0);
4289
4290 return rc;
4291
4292unwind:
4293 for(; rc > 0; rc--)
4294 __free_page(spages[rc-1]);
4295 return -ENOMEM;
4296}
4297
e50a1c2e
BF		 4298struct nfs4_cached_acl {
4299 int cached;
4300 size_t len;
3e9d4154 4301 char data[0];
e50a1c2e
BF		 4302};
4303
4304static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4305{
4306 struct nfs_inode *nfsi = NFS_I(inode);
4307
4308 spin_lock(&inode->i_lock);
4309 kfree(nfsi->nfs4_acl);
4310 nfsi->nfs4_acl = acl;
4311 spin_unlock(&inode->i_lock);
4312}
4313
4314static void nfs4_zap_acl_attr(struct inode *inode)
4315{
4316 nfs4_set_cached_acl(inode, NULL);
4317}
4318
4319static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4320{
4321 struct nfs_inode *nfsi = NFS_I(inode);
4322 struct nfs4_cached_acl *acl;
4323 int ret = -ENOENT;
4324
4325 spin_lock(&inode->i_lock);
4326 acl = nfsi->nfs4_acl;
4327 if (acl == NULL)
4328 goto out;
4329 if (buf == NULL) /* user is just asking for length */
4330 goto out_len;
4331 if (acl->cached == 0)
4332 goto out;
4333 ret = -ERANGE; /* see getxattr(2) man page */
4334 if (acl->len > buflen)
4335 goto out;
4336 memcpy(buf, acl->data, acl->len);
4337out_len:
4338 ret = acl->len;
4339out:
4340 spin_unlock(&inode->i_lock);
4341 return ret;
4342}
4343
5794d21e 4344static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4345{
4346 struct nfs4_cached_acl *acl;
b291f1b1 4347 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4348
1f1ea6c2 4349 if (buflen <= PAGE_SIZE) {
b291f1b1 4350 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4351 if (acl == NULL)
4352 goto out;
4353 acl->cached = 1;
5794d21e 4354 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4355 } else {
4356 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4357 if (acl == NULL)
4358 goto out;
4359 acl->cached = 0;
4360 }
4361 acl->len = acl_len;
4362out:
4363 nfs4_set_cached_acl(inode, acl);
4364}
4365
bf118a34
AA		 4366/*
4367 * The getxattr API returns the required buffer length when called with a
4368 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4369 * the required buf. On a NULL buf, we send a page of data to the server
4370 * guessing that the ACL request can be serviced by a page. If so, we cache
4371 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4372 * the cache. If not so, we throw away the page, and cache the required
4373 * length. The next getxattr call will then produce another round trip to
4374 * the server, this time with the input buf of the required size.
4375 */
16b4289c 4376static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4377{
bf118a34 4378 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4379 struct nfs_getaclargs args = {
4380 .fh = NFS_FH(inode),
4381 .acl_pages = pages,
4382 .acl_len = buflen,
4383 };
663c79b3
BH		 4384 struct nfs_getaclres res = {
4385 .acl_len = buflen,
4386 };
aa1870af
BF		 4387 struct rpc_message msg = {
4388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4389 .rpc_argp = &args,
663c79b3 4390 .rpc_resp = &res,
aa1870af 4391 };
21f498c2
TM		 4392 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4393 int ret = -ENOMEM, i;
aa1870af 4394
bf118a34
AA		 4395 /* As long as we're doing a round trip to the server anyway,
4396 * let's be prepared for a page of acl data. */
4397 if (npages == 0)
4398 npages = 1;
21f498c2
TM		 4399 if (npages > ARRAY_SIZE(pages))
4400 return -ERANGE;
5a006899 4401
bf118a34
AA		 4402 for (i = 0; i < npages; i++) {
4403 pages[i] = alloc_page(GFP_KERNEL);
4404 if (!pages[i])
4405 goto out_free;
e50a1c2e 4406 }
5a006899
SP		 4407
4408 /* for decoding across pages */
4409 res.acl_scratch = alloc_page(GFP_KERNEL);
4410 if (!res.acl_scratch)
4411 goto out_free;
4412
bf118a34
AA		 4413 args.acl_len = npages * PAGE_SIZE;
4414 args.acl_pgbase = 0;
5a006899 4415
de040bec 4416 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4417 __func__, buf, buflen, npages, args.acl_len);
4418 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4419 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4420 if (ret)
4421 goto out_free;
bf118a34 4422
1f1ea6c2
TM		 4423 /* Handle the case where the passed-in buffer is too short */
4424 if (res.acl_flags & NFS4_ACL_TRUNC) {
4425 /* Did the user only issue a request for the acl length? */
4426 if (buf == NULL)
4427 goto out_ok;
e50a1c2e 4428 ret = -ERANGE;
1f1ea6c2 4429 goto out_free;
e50a1c2e 4430 }
1f1ea6c2 4431 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4432 if (buf) {
4433 if (res.acl_len > buflen) {
4434 ret = -ERANGE;
4435 goto out_free;
4436 }
1f1ea6c2 4437 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4438 }
1f1ea6c2
TM		 4439out_ok:
4440 ret = res.acl_len;
e50a1c2e 4441out_free:
bf118a34
AA		 4442 for (i = 0; i < npages; i++)
4443 if (pages[i])
4444 __free_page(pages[i]);
331818f1
TM		 4445 if (res.acl_scratch)
4446 __free_page(res.acl_scratch);
aa1870af
BF		 4447 return ret;
4448}
4449
16b4289c
TM		 4450static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4451{
4452 struct nfs4_exception exception = { };
4453 ssize_t ret;
4454 do {
4455 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4456 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4457 if (ret >= 0)
4458 break;
4459 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4460 } while (exception.retry);
4461 return ret;
4462}
4463
e50a1c2e
BF		 4464static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4465{
4466 struct nfs_server *server = NFS_SERVER(inode);
4467 int ret;
4468
4469 if (!nfs4_server_supports_acls(server))
4470 return -EOPNOTSUPP;
4471 ret = nfs_revalidate_inode(server, inode);
4472 if (ret < 0)
4473 return ret;
08a22b39
AK		 4474 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4475 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4476 ret = nfs4_read_cached_acl(inode, buf, buflen);
4477 if (ret != -ENOENT)
bf118a34
AA		 4478 /* -ENOENT is returned if there is no ACL or if there is an ACL
4479 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4480 return ret;
4481 return nfs4_get_acl_uncached(inode, buf, buflen);
4482}
4483
16b4289c 4484static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4485{
4486 struct nfs_server *server = NFS_SERVER(inode);
4487 struct page *pages[NFS4ACL_MAXPAGES];
4488 struct nfs_setaclargs arg = {
4489 .fh = NFS_FH(inode),
4490 .acl_pages = pages,
4491 .acl_len = buflen,
4492 };
73c403a9 4493 struct nfs_setaclres res;
4b580ee3
BF		 4494 struct rpc_message msg = {
4495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4496 .rpc_argp = &arg,
73c403a9 4497 .rpc_resp = &res,
4b580ee3 4498 };
21f498c2 4499 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4500 int ret, i;
4b580ee3
BF		 4501
4502 if (!nfs4_server_supports_acls(server))
4503 return -EOPNOTSUPP;
21f498c2
TM		 4504 if (npages > ARRAY_SIZE(pages))
4505 return -ERANGE;
e9e3d724
NH		 4506 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4507 if (i < 0)
4508 return i;
57ec14c5 4509 nfs4_inode_return_delegation(inode);
7c513058 4510 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4511
4512 /*
4513 * Free each page after tx, so the only ref left is
4514 * held by the network stack
4515 */
4516 for (; i > 0; i--)
4517 put_page(pages[i-1]);
4518
08a22b39
AK		 4519 /*
4520 * Acl update can result in inode attribute update.
4521 * so mark the attribute cache invalid.
4522 */
4523 spin_lock(&inode->i_lock);
4524 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4525 spin_unlock(&inode->i_lock);
f41f7418
TM		 4526 nfs_access_zap_cache(inode);
4527 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4528 return ret;
4529}
4530
16b4289c
TM		 4531static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4532{
4533 struct nfs4_exception exception = { };
4534 int err;
4535 do {
c1578b76
TM		 4536 err = __nfs4_proc_set_acl(inode, buf, buflen);
4537 trace_nfs4_set_acl(inode, err);
4538 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4539 &exception);
4540 } while (exception.retry);
4541 return err;
4542}
4543
aa9c2669
DQ		 4544#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4545static int _nfs4_get_security_label(struct inode *inode, void *buf,
4546 size_t buflen)
4547{
4548 struct nfs_server *server = NFS_SERVER(inode);
4549 struct nfs_fattr fattr;
4550 struct nfs4_label label = {0, 0, buflen, buf};
4551
4552 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4553 struct nfs4_getattr_arg args = {
4554 .fh = NFS_FH(inode),
4555 .bitmask = bitmask,
4556 };
4557 struct nfs4_getattr_res res = {
4558 .fattr = &fattr,
4559 .label = &label,
4560 .server = server,
4561 };
4562 struct rpc_message msg = {
4563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4564 .rpc_argp = &args,
4565 .rpc_resp = &res,
4566 };
4567 int ret;
4568
4569 nfs_fattr_init(&fattr);
4570
4571 ret = rpc_call_sync(server->client, &msg, 0);
4572 if (ret)
4573 return ret;
4574 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4575 return -ENOENT;
4576 if (buflen < label.len)
4577 return -ERANGE;
4578 return 0;
4579}
4580
4581static int nfs4_get_security_label(struct inode *inode, void *buf,
4582 size_t buflen)
4583{
4584 struct nfs4_exception exception = { };
4585 int err;
4586
4587 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4588 return -EOPNOTSUPP;
4589
4590 do {
c1578b76
TM		 4591 err = _nfs4_get_security_label(inode, buf, buflen);
4592 trace_nfs4_get_security_label(inode, err);
4593 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4594 &exception);
4595 } while (exception.retry);
4596 return err;
4597}
4598
4599static int _nfs4_do_set_security_label(struct inode *inode,
4600 struct nfs4_label *ilabel,
4601 struct nfs_fattr *fattr,
4602 struct nfs4_label *olabel)
4603{
4604
4605 struct iattr sattr = {0};
4606 struct nfs_server *server = NFS_SERVER(inode);
4607 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4608 struct nfs_setattrargs args = {
4609 .fh = NFS_FH(inode),
4610 .iap = &sattr,
4611 .server = server,
4612 .bitmask = bitmask,
4613 .label = ilabel,
4614 };
4615 struct nfs_setattrres res = {
4616 .fattr = fattr,
4617 .label = olabel,
4618 .server = server,
4619 };
4620 struct rpc_message msg = {
4621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4622 .rpc_argp = &args,
4623 .rpc_resp = &res,
4624 };
4625 int status;
4626
4627 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4628
4629 status = rpc_call_sync(server->client, &msg, 0);
4630 if (status)
4631 dprintk("%s failed: %d\n", __func__, status);
4632
4633 return status;
4634}
4635
4636static int nfs4_do_set_security_label(struct inode *inode,
4637 struct nfs4_label *ilabel,
4638 struct nfs_fattr *fattr,
4639 struct nfs4_label *olabel)
4640{
4641 struct nfs4_exception exception = { };
4642 int err;
4643
4644 do {
c1578b76
TM		 4645 err = _nfs4_do_set_security_label(inode, ilabel,
4646 fattr, olabel);
4647 trace_nfs4_set_security_label(inode, err);
4648 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4649 &exception);
4650 } while (exception.retry);
4651 return err;
4652}
4653
4654static int
4655nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4656{
4657 struct nfs4_label ilabel, *olabel = NULL;
4658 struct nfs_fattr fattr;
4659 struct rpc_cred *cred;
4660 struct inode *inode = dentry->d_inode;
4661 int status;
4662
4663 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4664 return -EOPNOTSUPP;
4665
4666 nfs_fattr_init(&fattr);
4667
4668 ilabel.pi = 0;
4669 ilabel.lfs = 0;
4670 ilabel.label = (char *)buf;
4671 ilabel.len = buflen;
4672
4673 cred = rpc_lookup_cred();
4674 if (IS_ERR(cred))
4675 return PTR_ERR(cred);
4676
4677 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4678 if (IS_ERR(olabel)) {
4679 status = -PTR_ERR(olabel);
4680 goto out;
4681 }
4682
4683 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4684 if (status == 0)
4685 nfs_setsecurity(inode, &fattr, olabel);
4686
4687 nfs4_label_free(olabel);
4688out:
4689 put_rpccred(cred);
4690 return status;
4691}
4692#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4693
4694
1da177e4 4695static int
aa5190d0 4696nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4697{
aa5190d0
TM		 4698 struct nfs_client *clp = server->nfs_client;
4699
4700 if (task->tk_status >= 0)
1da177e4
LT		 4701 return 0;
4702 switch(task->tk_status) {
a1d0b5ee 4703 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4704 case -NFS4ERR_ADMIN_REVOKED:
4705 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4706 if (state == NULL)
4707 break;
4708 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4709 case -NFS4ERR_OPENMODE:
4710 if (state == NULL)
4711 break;
5d422301
TM		 4712 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4713 goto stateid_invalid;
0400a6b0 4714 goto wait_on_recovery;
0ced63d1 4715 case -NFS4ERR_EXPIRED:
5d422301
TM		 4716 if (state != NULL) {
4717 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4718 goto stateid_invalid;
4719 }
1da177e4 4720 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4721 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4722 nfs4_schedule_lease_recovery(clp);
4723 goto wait_on_recovery;
4745e315
AA		 4724#if defined(CONFIG_NFS_V4_1)
4725 case -NFS4ERR_BADSESSION:
4726 case -NFS4ERR_BADSLOT:
4727 case -NFS4ERR_BAD_HIGH_SLOT:
4728 case -NFS4ERR_DEADSESSION:
4729 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4730 case -NFS4ERR_SEQ_FALSE_RETRY:
4731 case -NFS4ERR_SEQ_MISORDERED:
4732 dprintk("%s ERROR %d, Reset session\n", __func__,
4733 task->tk_status);
9f594791 4734 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4735 task->tk_status = 0;
4736 return -EAGAIN;
4737#endif /* CONFIG_NFS_V4_1 */
1da177e4 4738 case -NFS4ERR_DELAY:
aa5190d0 4739 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4740 case -NFS4ERR_GRACE:
1da177e4
LT		 4741 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4742 task->tk_status = 0;
4743 return -EAGAIN;
a8a4ae3a 4744 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4745 case -NFS4ERR_OLD_STATEID:
4746 task->tk_status = 0;
4747 return -EAGAIN;
4748 }
4749 task->tk_status = nfs4_map_errors(task->tk_status);
4750 return 0;
5d422301
TM		 4751stateid_invalid:
4752 task->tk_status = -EIO;
4753 return 0;
0400a6b0 4754wait_on_recovery:
a2c0b9e2 4755 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4756 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4757 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4758 task->tk_status = 0;
4759 return -EAGAIN;
1da177e4
LT		 4760}
4761
f092075d
CL		 4762static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4763 nfs4_verifier *bootverf)
cd93710e
CL		 4764{
4765 __be32 verf[2];
4766
2c820d9a
CL		 4767 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4768 /* An impossible timestamp guarantees this value
4769 * will never match a generated boot time. */
4770 verf[0] = 0;
17f26b12 4771 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4772 } else {
f092075d 4773 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4774 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4775 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4776 }
cd93710e
CL		 4777 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4778}
4779
e984a55a
CL		 4780static unsigned int
4781nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4782 char *buf, size_t len)
4783{
4784 unsigned int result;
4785
4786 rcu_read_lock();
4787 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4788 clp->cl_ipaddr,
4789 rpc_peeraddr2str(clp->cl_rpcclient,
4790 RPC_DISPLAY_ADDR),
4791 rpc_peeraddr2str(clp->cl_rpcclient,
4792 RPC_DISPLAY_PROTO));
4793 rcu_read_unlock();
4794 return result;
4795}
4796
4797static unsigned int
4798nfs4_init_uniform_client_string(const struct nfs_client *clp,
4799 char *buf, size_t len)
4800{
55b59293 4801 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4802
4803 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4804 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4805 clp->rpc_ops->version,
4806 clp->cl_minorversion,
4807 nfs4_client_id_uniquifier,
4808 nodename);
e984a55a
CL		 4809 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4810 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4811 nodename);
e984a55a
CL		 4812}
4813
6bbb4ae8
CL		 4814/**
4815 * nfs4_proc_setclientid - Negotiate client ID
4816 * @clp: state data structure
4817 * @program: RPC program for NFSv4 callback service
4818 * @port: IP port number for NFS4 callback service
4819 * @cred: RPC credential to use for this call
4820 * @res: where to place the result
4821 *
4822 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4823 */
bb8b27e5
TM		 4824int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4825 unsigned short port, struct rpc_cred *cred,
4826 struct nfs4_setclientid_res *res)
1da177e4
LT		 4827{
4828 nfs4_verifier sc_verifier;
4829 struct nfs4_setclientid setclientid = {
4830 .sc_verifier = &sc_verifier,
4831 .sc_prog = program,
f4eecd5d 4832 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4833 };
4834 struct rpc_message msg = {
4835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4836 .rpc_argp = &setclientid,
bb8b27e5 4837 .rpc_resp = res,
286d7d6a 4838 .rpc_cred = cred,
1da177e4 4839 };
6bbb4ae8 4840 int status;
1da177e4 4841
de734831 4842 /* nfs_client_id4 */
f092075d 4843 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4844 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4845 setclientid.sc_name_len =
4846 nfs4_init_uniform_client_string(clp,
4847 setclientid.sc_name,
4848 sizeof(setclientid.sc_name));
4849 else
4850 setclientid.sc_name_len =
4851 nfs4_init_nonuniform_client_string(clp,
4852 setclientid.sc_name,
4853 sizeof(setclientid.sc_name));
de734831 4854 /* cb_client4 */
e984a55a 4855 rcu_read_lock();
de734831 4856 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4857 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4858 rpc_peeraddr2str(clp->cl_rpcclient,
4859 RPC_DISPLAY_NETID));
de734831
CL		 4860 rcu_read_unlock();
4861 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4862 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4863 clp->cl_ipaddr, port >> 8, port & 255);
4864
6bbb4ae8
CL		 4865 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4866 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4867 setclientid.sc_name_len, setclientid.sc_name);
4868 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4869 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4870 dprintk("NFS reply setclientid: %d\n", status);
4871 return status;
1da177e4
LT		 4872}
4873
6bbb4ae8
CL		 4874/**
4875 * nfs4_proc_setclientid_confirm - Confirm client ID
4876 * @clp: state data structure
4877 * @res: result of a previous SETCLIENTID
4878 * @cred: RPC credential to use for this call
4879 *
4880 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4881 */
fd954ae1 4882int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4883 struct nfs4_setclientid_res *arg,
4884 struct rpc_cred *cred)
1da177e4 4885{
1da177e4
LT		 4886 struct rpc_message msg = {
4887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4888 .rpc_argp = arg,
286d7d6a 4889 .rpc_cred = cred,
1da177e4 4890 };
1da177e4
LT		 4891 int status;
4892
6bbb4ae8
CL		 4893 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4894 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4895 clp->cl_clientid);
1bd714f2 4896 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4897 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4898 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4899 return status;
4900}
4901
fe650407
TM		 4902struct nfs4_delegreturndata {
4903 struct nfs4_delegreturnargs args;
fa178f29 4904 struct nfs4_delegreturnres res;
fe650407
TM		 4905 struct nfs_fh fh;
4906 nfs4_stateid stateid;
26e976a8 4907 unsigned long timestamp;
fa178f29 4908 struct nfs_fattr fattr;
fe650407
TM		 4909 int rpc_status;
4910};
4911
fe650407
TM		 4912static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4913{
4914 struct nfs4_delegreturndata *data = calldata;
938e1010 4915
14516c3a
TM		 4916 if (!nfs4_sequence_done(task, &data->res.seq_res))
4917 return;
938e1010 4918
ca8acf8d 4919 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4920 switch (task->tk_status) {
4921 case -NFS4ERR_STALE_STATEID:
4922 case -NFS4ERR_EXPIRED:
4923 case 0:
fa178f29 4924 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4925 break;
4926 default:
4927 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4928 -EAGAIN) {
d00c5d43 4929 rpc_restart_call_prepare(task);
79708861
RL		 4930 return;
4931 }
4932 }
4933 data->rpc_status = task->tk_status;
fe650407
TM		 4934}
4935
4936static void nfs4_delegreturn_release(void *calldata)
4937{
fe650407
TM		 4938 kfree(calldata);
4939}
4940
938e1010
AA		 4941static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4942{
4943 struct nfs4_delegreturndata *d_data;
4944
4945 d_data = (struct nfs4_delegreturndata *)data;
4946
d9afbd1b
TM		 4947 nfs4_setup_sequence(d_data->res.server,
4948 &d_data->args.seq_args,
4949 &d_data->res.seq_res,
4950 task);
938e1010 4951}
938e1010 4952
c8d149f3 4953static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4954 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4955 .rpc_call_done = nfs4_delegreturn_done,
4956 .rpc_release = nfs4_delegreturn_release,
4957};
4958
e6f81075 4959static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4960{
4961 struct nfs4_delegreturndata *data;
fa178f29 4962 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4963 struct rpc_task *task;
5138fde0
TM		 4964 struct rpc_message msg = {
4965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4966 .rpc_cred = cred,
4967 };
c970aa85
TM		 4968 struct rpc_task_setup task_setup_data = {
4969 .rpc_client = server->client,
5138fde0 4970 .rpc_message = &msg,
c970aa85
TM		 4971 .callback_ops = &nfs4_delegreturn_ops,
4972 .flags = RPC_TASK_ASYNC,
4973 };
e6f81075 4974 int status = 0;
fe650407 4975
8535b2be 4976 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4977 if (data == NULL)
4978 return -ENOMEM;
a9c92d6b 4979 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4980 data->args.fhandle = &data->fh;
4981 data->args.stateid = &data->stateid;
9e907fec 4982 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4983 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4984 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4985 data->res.fattr = &data->fattr;
4986 data->res.server = server;
5138fde0 4987 nfs_fattr_init(data->res.fattr);
26e976a8 4988 data->timestamp = jiffies;
fe650407
TM		 4989 data->rpc_status = 0;
4990
c970aa85 4991 task_setup_data.callback_data = data;
1174dd1f
TM		 4992 msg.rpc_argp = &data->args;
4993 msg.rpc_resp = &data->res;
c970aa85 4994 task = rpc_run_task(&task_setup_data);
7a1218a2 4995 if (IS_ERR(task))
fe650407 4996 return PTR_ERR(task);
e6f81075
TM		 4997 if (!issync)
4998 goto out;
fe650407 4999 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5000 if (status != 0)
5001 goto out;
5002 status = data->rpc_status;
e144cbcc
TM		 5003 if (status == 0)
5004 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5005 else
5006 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5007out:
e6b3c4db 5008 rpc_put_task(task);
fe650407 5009 return status;
1da177e4
LT		 5010}
5011
e6f81075 5012int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5013{
5014 struct nfs_server *server = NFS_SERVER(inode);
5015 struct nfs4_exception exception = { };
5016 int err;
5017 do {
e6f81075 5018 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5019 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5020 switch (err) {
5021 case -NFS4ERR_STALE_STATEID:
5022 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5023 case 0:
5024 return 0;
5025 }
5026 err = nfs4_handle_exception(server, err, &exception);
5027 } while (exception.retry);
5028 return err;
5029}
5030
5031#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5032#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5033
5034/*
5035 * sleep, with exponential backoff, and retry the LOCK operation.
5036 */
5037static unsigned long
5038nfs4_set_lock_task_retry(unsigned long timeout)
5039{
416ad3c9 5040 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5041 timeout <<= 1;
5042 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5043 return NFS4_LOCK_MAXTIMEOUT;
5044 return timeout;
5045}
5046
1da177e4
LT		 5047static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5048{
5049 struct inode *inode = state->inode;
5050 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5051 struct nfs_client *clp = server->nfs_client;
911d1aaf 5052 struct nfs_lockt_args arg = {
1da177e4 5053 .fh = NFS_FH(inode),
911d1aaf 5054 .fl = request,
1da177e4 5055 };
911d1aaf
TM		 5056 struct nfs_lockt_res res = {
5057 .denied = request,
1da177e4
LT		 5058 };
5059 struct rpc_message msg = {
5060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5061 .rpc_argp = &arg,
5062 .rpc_resp = &res,
5063 .rpc_cred = state->owner->so_cred,
5064 };
1da177e4
LT		 5065 struct nfs4_lock_state *lsp;
5066 int status;
5067
911d1aaf 5068 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5069 status = nfs4_set_lock_state(state, request);
5070 if (status != 0)
5071 goto out;
5072 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5073 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5074 arg.lock_owner.s_dev = server->s_dev;
7c513058 5075 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5076 switch (status) {
5077 case 0:
5078 request->fl_type = F_UNLCK;
5079 break;
5080 case -NFS4ERR_DENIED:
5081 status = 0;
1da177e4 5082 }
70cc6487 5083 request->fl_ops->fl_release_private(request);
8d0a8a9d 5084out:
1da177e4
LT		 5085 return status;
5086}
5087
5088static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5089{
5090 struct nfs4_exception exception = { };
5091 int err;
5092
5093 do {
d1b748a5
TM		 5094 err = _nfs4_proc_getlk(state, cmd, request);
5095 trace_nfs4_get_lock(request, state, cmd, err);
5096 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5097 &exception);
5098 } while (exception.retry);
5099 return err;
5100}
5101
5102static int do_vfs_lock(struct file *file, struct file_lock *fl)
5103{
5104 int res = 0;
5105 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5106 case FL_POSIX:
5107 res = posix_lock_file_wait(file, fl);
5108 break;
5109 case FL_FLOCK:
5110 res = flock_lock_file_wait(file, fl);
5111 break;
5112 default:
5113 BUG();
5114 }
1da177e4
LT		 5115 return res;
5116}
5117
faf5f49c 5118struct nfs4_unlockdata {
911d1aaf
TM		 5119 struct nfs_locku_args arg;
5120 struct nfs_locku_res res;
faf5f49c
TM		 5121 struct nfs4_lock_state *lsp;
5122 struct nfs_open_context *ctx;
911d1aaf
TM		 5123 struct file_lock fl;
5124 const struct nfs_server *server;
26e976a8 5125 unsigned long timestamp;
faf5f49c
TM		 5126};
5127
911d1aaf
TM		 5128static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5129 struct nfs_open_context *ctx,
5130 struct nfs4_lock_state *lsp,
5131 struct nfs_seqid *seqid)
5132{
5133 struct nfs4_unlockdata *p;
5134 struct inode *inode = lsp->ls_state->inode;
5135
8535b2be 5136 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5137 if (p == NULL)
5138 return NULL;
5139 p->arg.fh = NFS_FH(inode);
5140 p->arg.fl = &p->fl;
5141 p->arg.seqid = seqid;
c1d51931 5142 p->res.seqid = seqid;
911d1aaf
TM		 5143 p->arg.stateid = &lsp->ls_stateid;
5144 p->lsp = lsp;
5145 atomic_inc(&lsp->ls_count);
5146 /* Ensure we don't close file until we're done freeing locks! */
5147 p->ctx = get_nfs_open_context(ctx);
5148 memcpy(&p->fl, fl, sizeof(p->fl));
5149 p->server = NFS_SERVER(inode);
5150 return p;
5151}
5152
06f814a3 5153static void nfs4_locku_release_calldata(void *data)
faf5f49c 5154{
963d8fe5 5155 struct nfs4_unlockdata *calldata = data;
911d1aaf 5156 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5157 nfs4_put_lock_state(calldata->lsp);
5158 put_nfs_open_context(calldata->ctx);
5159 kfree(calldata);
faf5f49c
TM		 5160}
5161
963d8fe5 5162static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5163{
963d8fe5 5164 struct nfs4_unlockdata *calldata = data;
faf5f49c 5165
14516c3a
TM		 5166 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5167 return;
faf5f49c
TM		 5168 switch (task->tk_status) {
5169 case 0:
f597c537
TM		 5170 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5171 &calldata->res.stateid);
26e976a8 5172 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5173 break;
9e33bed5
TM		 5174 case -NFS4ERR_BAD_STATEID:
5175 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5176 case -NFS4ERR_STALE_STATEID:
5177 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5178 break;
5179 default:
9e33bed5 5180 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5181 rpc_restart_call_prepare(task);
faf5f49c 5182 }
2b1bc308 5183 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5184}
5185
4ce70ada 5186static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5187{
4ce70ada 5188 struct nfs4_unlockdata *calldata = data;
faf5f49c 5189
911d1aaf 5190 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5191 goto out_wait;
795a88c9 5192 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5193 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5194 goto out_no_action;
faf5f49c 5195 }
26e976a8 5196 calldata->timestamp = jiffies;
035168ab 5197 if (nfs4_setup_sequence(calldata->server,
a893693c 5198 &calldata->arg.seq_args,
2240a9e2
TM		 5199 &calldata->res.seq_res,
5200 task) != 0)
5201 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5202 return;
5203out_no_action:
5204 task->tk_action = NULL;
5205out_wait:
5206 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5207}
5208
963d8fe5 5209static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5210 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5211 .rpc_call_done = nfs4_locku_done,
06f814a3 5212 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5213};
5214
a5d16a4d
TM		 5215static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5216 struct nfs_open_context *ctx,
5217 struct nfs4_lock_state *lsp,
5218 struct nfs_seqid *seqid)
5219{
5220 struct nfs4_unlockdata *data;
5138fde0
TM		 5221 struct rpc_message msg = {
5222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5223 .rpc_cred = ctx->cred,
5224 };
c970aa85
TM		 5225 struct rpc_task_setup task_setup_data = {
5226 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5227 .rpc_message = &msg,
c970aa85 5228 .callback_ops = &nfs4_locku_ops,
101070ca 5229 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5230 .flags = RPC_TASK_ASYNC,
5231 };
a5d16a4d 5232
137d6aca
FF		 5233 /* Ensure this is an unlock - when canceling a lock, the
5234 * canceled lock is passed in, and it won't be an unlock.
5235 */
5236 fl->fl_type = F_UNLCK;
5237
a5d16a4d
TM		 5238 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5239 if (data == NULL) {
5240 nfs_free_seqid(seqid);
5241 return ERR_PTR(-ENOMEM);
5242 }
5243
a9c92d6b 5244 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5245 msg.rpc_argp = &data->arg;
5246 msg.rpc_resp = &data->res;
c970aa85
TM		 5247 task_setup_data.callback_data = data;
5248 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5249}
5250
faf5f49c
TM		 5251static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5252{
65b62a29
TM		 5253 struct inode *inode = state->inode;
5254 struct nfs4_state_owner *sp = state->owner;
5255 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5256 struct nfs_seqid *seqid;
1da177e4 5257 struct nfs4_lock_state *lsp;
06f814a3
TM		 5258 struct rpc_task *task;
5259 int status = 0;
536ff0f8 5260 unsigned char fl_flags = request->fl_flags;
faf5f49c 5261
8d0a8a9d 5262 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5263 /* Unlock _before_ we do the RPC call */
5264 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5265 /* Exclude nfs_delegation_claim_locks() */
5266 mutex_lock(&sp->so_delegreturn_mutex);
5267 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5268 down_read(&nfsi->rwsem);
5269 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5270 up_read(&nfsi->rwsem);
65b62a29 5271 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5272 goto out;
19e03c57
TM		 5273 }
5274 up_read(&nfsi->rwsem);
65b62a29 5275 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5276 if (status != 0)
9b073574
TM		 5277 goto out;
5278 /* Is this a delegated lock? */
8d0a8a9d 5279 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5280 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5281 goto out;
8535b2be 5282 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5283 status = -ENOMEM;
911d1aaf 5284 if (seqid == NULL)
9b073574 5285 goto out;
cd3758e3 5286 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5287 status = PTR_ERR(task);
5288 if (IS_ERR(task))
9b073574 5289 goto out;
a5d16a4d 5290 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5291 rpc_put_task(task);
9b073574 5292out:
536ff0f8 5293 request->fl_flags = fl_flags;
d1b748a5 5294 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5295 return status;
5296}
5297
a5d16a4d
TM		 5298struct nfs4_lockdata {
5299 struct nfs_lock_args arg;
5300 struct nfs_lock_res res;
5301 struct nfs4_lock_state *lsp;
5302 struct nfs_open_context *ctx;
5303 struct file_lock fl;
26e976a8 5304 unsigned long timestamp;
a5d16a4d
TM		 5305 int rpc_status;
5306 int cancelled;
66179efe 5307 struct nfs_server *server;
a5d16a4d
TM		 5308};
5309
5310static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5311 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5312 gfp_t gfp_mask)
1da177e4 5313{
a5d16a4d
TM		 5314 struct nfs4_lockdata *p;
5315 struct inode *inode = lsp->ls_state->inode;
1da177e4 5316 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5317
8535b2be 5318 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5319 if (p == NULL)
5320 return NULL;
5321
5322 p->arg.fh = NFS_FH(inode);
5323 p->arg.fl = &p->fl;
8535b2be 5324 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5325 if (p->arg.open_seqid == NULL)
5326 goto out_free;
8535b2be 5327 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5328 if (p->arg.lock_seqid == NULL)
2f74c0a0 5329 goto out_free_seqid;
a5d16a4d 5330 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5331 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5332 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5333 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5334 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5335 p->lsp = lsp;
66179efe 5336 p->server = server;
a5d16a4d
TM		 5337 atomic_inc(&lsp->ls_count);
5338 p->ctx = get_nfs_open_context(ctx);
5339 memcpy(&p->fl, fl, sizeof(p->fl));
5340 return p;
2f74c0a0
TM		 5341out_free_seqid:
5342 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5343out_free:
5344 kfree(p);
5345 return NULL;
5346}
5347
5348static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5349{
5350 struct nfs4_lockdata *data = calldata;
5351 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5352
3110ff80 5353 dprintk("%s: begin!\n", __func__);
2f74c0a0 5354 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5355 goto out_wait;
a5d16a4d
TM		 5356 /* Do we need to do an open_to_lock_owner? */
5357 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5358 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5359 goto out_release_lock_seqid;
8fe72bac 5360 }
8e472f33 5361 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5362 data->arg.new_lock_owner = 1;
c1d51931 5363 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5364 } else
5365 data->arg.new_lock_owner = 0;
5d422301
TM		 5366 if (!nfs4_valid_open_stateid(state)) {
5367 data->rpc_status = -EBADF;
5368 task->tk_action = NULL;
5369 goto out_release_open_seqid;
5370 }
26e976a8 5371 data->timestamp = jiffies;
035168ab
TM		 5372 if (nfs4_setup_sequence(data->server,
5373 &data->arg.seq_args,
2240a9e2 5374 &data->res.seq_res,
d9afbd1b 5375 task) == 0)
66179efe 5376 return;
5d422301 5377out_release_open_seqid:
2240a9e2
TM		 5378 nfs_release_seqid(data->arg.open_seqid);
5379out_release_lock_seqid:
5380 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5381out_wait:
5382 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5383 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5384}
5385
a5d16a4d
TM		 5386static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5387{
5388 struct nfs4_lockdata *data = calldata;
5389
3110ff80 5390 dprintk("%s: begin!\n", __func__);
a5d16a4d 5391
14516c3a
TM		 5392 if (!nfs4_sequence_done(task, &data->res.seq_res))
5393 return;
66179efe 5394
a5d16a4d 5395 data->rpc_status = task->tk_status;
a5d16a4d 5396 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5397 if (data->rpc_status == 0)
5398 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5399 else
5400 goto out;
5401 }
5402 if (data->rpc_status == 0) {
f597c537 5403 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5404 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5405 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5406 }
a5d16a4d 5407out:
3110ff80 5408 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5409}
5410
5411static void nfs4_lock_release(void *calldata)
5412{
5413 struct nfs4_lockdata *data = calldata;
5414
3110ff80 5415 dprintk("%s: begin!\n", __func__);
2f74c0a0 5416 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5417 if (data->cancelled != 0) {
5418 struct rpc_task *task;
5419 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5420 data->arg.lock_seqid);
5421 if (!IS_ERR(task))
bf294b41 5422 rpc_put_task_async(task);
3110ff80 5423 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5424 } else
5425 nfs_free_seqid(data->arg.lock_seqid);
5426 nfs4_put_lock_state(data->lsp);
5427 put_nfs_open_context(data->ctx);
5428 kfree(data);
3110ff80 5429 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5430}
5431
5432static const struct rpc_call_ops nfs4_lock_ops = {
5433 .rpc_call_prepare = nfs4_lock_prepare,
5434 .rpc_call_done = nfs4_lock_done,
5435 .rpc_release = nfs4_lock_release,
5436};
5437
2bee72a6
TM		 5438static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5439{
2bee72a6
TM		 5440 switch (error) {
5441 case -NFS4ERR_ADMIN_REVOKED:
5442 case -NFS4ERR_BAD_STATEID:
ecac799a 5443 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5444 if (new_lock_owner != 0 ||
795a88c9 5445 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5446 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5447 break;
5448 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5449 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5450 case -NFS4ERR_EXPIRED:
5451 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5452 };
5453}
5454
afe6c27c 5455static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5456{
5457 struct nfs4_lockdata *data;
5458 struct rpc_task *task;
5138fde0
TM		 5459 struct rpc_message msg = {
5460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5461 .rpc_cred = state->owner->so_cred,
5462 };
c970aa85
TM		 5463 struct rpc_task_setup task_setup_data = {
5464 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5465 .rpc_message = &msg,
c970aa85 5466 .callback_ops = &nfs4_lock_ops,
101070ca 5467 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5468 .flags = RPC_TASK_ASYNC,
5469 };
a5d16a4d
TM		 5470 int ret;
5471
3110ff80 5472 dprintk("%s: begin!\n", __func__);
cd3758e3 5473 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5474 fl->fl_u.nfs4_fl.owner,
5475 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5476 if (data == NULL)
5477 return -ENOMEM;
5478 if (IS_SETLKW(cmd))
5479 data->arg.block = 1;
a9c92d6b 5480 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5481 msg.rpc_argp = &data->arg;
5482 msg.rpc_resp = &data->res;
c970aa85 5483 task_setup_data.callback_data = data;
8fe72bac
TM		 5484 if (recovery_type > NFS_LOCK_NEW) {
5485 if (recovery_type == NFS_LOCK_RECLAIM)
5486 data->arg.reclaim = NFS_LOCK_RECLAIM;
5487 nfs4_set_sequence_privileged(&data->arg.seq_args);
5488 }
c970aa85 5489 task = rpc_run_task(&task_setup_data);
7a1218a2 5490 if (IS_ERR(task))
a5d16a4d 5491 return PTR_ERR(task);
a5d16a4d
TM		 5492 ret = nfs4_wait_for_completion_rpc_task(task);
5493 if (ret == 0) {
5494 ret = data->rpc_status;
2bee72a6
TM		 5495 if (ret)
5496 nfs4_handle_setlk_error(data->server, data->lsp,
5497 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5498 } else
5499 data->cancelled = 1;
e6b3c4db 5500 rpc_put_task(task);
3110ff80 5501 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5502 return ret;
1da177e4
LT		 5503}
5504
5505static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5506{
202b50dc 5507 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5508 struct nfs4_exception exception = {
5509 .inode = state->inode,
5510 };
202b50dc
TM		 5511 int err;
5512
5513 do {
42a2d13e
TM		 5514 /* Cache the lock if possible... */
5515 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5516 return 0;
afe6c27c 5517 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5518 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5519 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5520 break;
5521 nfs4_handle_exception(server, err, &exception);
5522 } while (exception.retry);
5523 return err;
1da177e4
LT		 5524}
5525
ef1820f9
N		 5526bool recover_locks = true;
5527module_param(recover_locks, bool, 0644);
5528MODULE_PARM_DESC(recover_locks,
5529 "If the server reports that a lock might be lost, "
5530 "try to recovery it risking corruption.");
5531
1da177e4
LT		 5532static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5533{
202b50dc 5534 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5535 struct nfs4_exception exception = {
5536 .inode = state->inode,
5537 };
202b50dc
TM		 5538 int err;
5539
6bfc93ef
TM		 5540 err = nfs4_set_lock_state(state, request);
5541 if (err != 0)
5542 return err;
ef1820f9
N		 5543 if (!recover_locks) {
5544 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5545 return 0;
5546 }
202b50dc 5547 do {
42a2d13e
TM		 5548 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5549 return 0;
afe6c27c 5550 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5551 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5552 switch (err) {
5553 default:
5554 goto out;
5555 case -NFS4ERR_GRACE:
5556 case -NFS4ERR_DELAY:
5557 nfs4_handle_exception(server, err, &exception);
5558 err = 0;
5559 }
202b50dc 5560 } while (exception.retry);
a9ed2e25 5561out:
202b50dc 5562 return err;
1da177e4
LT		 5563}
5564
f062eb6c 5565#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5566/**
5567 * nfs41_check_expired_locks - possibly free a lock stateid
5568 *
5569 * @state: NFSv4 state for an inode
5570 *
5571 * Returns NFS_OK if recovery for this stateid is now finished.
5572 * Otherwise a negative NFS4ERR value is returned.
5573 */
b01dd1d8 5574static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5575{
eb64cf96 5576 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5577 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5578 struct nfs_server *server = NFS_SERVER(state->inode);
5579
b01dd1d8 5580 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5581 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5582 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5583
5584 status = nfs41_test_stateid(server,
5585 &lsp->ls_stateid,
5586 cred);
08cb47fa 5587 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5588 if (status != NFS_OK) {
3e60ffdd
CL		 5589 /* Free the stateid unless the server
5590 * informs us the stateid is unrecognized. */
89af2739
CL		 5591 if (status != -NFS4ERR_BAD_STATEID)
5592 nfs41_free_stateid(server,
ab7cb0df
TM		 5593 &lsp->ls_stateid,
5594 cred);
795a88c9 5595 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5596 ret = status;
5597 }
5598 }
5599 };
5600
5601 return ret;
5602}
5603
5604static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5605{
5606 int status = NFS_OK;
5607
5608 if (test_bit(LK_STATE_IN_USE, &state->flags))
5609 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5610 if (status != NFS_OK)
5611 status = nfs4_lock_expired(state, request);
5612 return status;
f062eb6c
BS		 5613}
5614#endif
5615
1da177e4
LT		 5616static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5617{
9a99af49 5618 struct nfs4_state_owner *sp = state->owner;
19e03c57 5619 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5620 unsigned char fl_flags = request->fl_flags;
9a99af49 5621 unsigned int seq;
8e469ebd 5622 int status = -ENOLCK;
1da177e4 5623
8e469ebd
TM		 5624 if ((fl_flags & FL_POSIX) &&
5625 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5626 goto out;
6bfc93ef 5627 /* Is this a delegated open? */
6bfc93ef
TM		 5628 status = nfs4_set_lock_state(state, request);
5629 if (status != 0)
5630 goto out;
01c3b861
TM		 5631 request->fl_flags |= FL_ACCESS;
5632 status = do_vfs_lock(request->fl_file, request);
5633 if (status < 0)
5634 goto out;
19e03c57 5635 down_read(&nfsi->rwsem);
01c3b861 5636 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5637 /* Yes: cache locks! */
01c3b861 5638 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5639 request->fl_flags = fl_flags & ~FL_SLEEP;
5640 status = do_vfs_lock(request->fl_file, request);
5641 goto out_unlock;
01c3b861 5642 }
9a99af49
TM		 5643 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5644 up_read(&nfsi->rwsem);
afe6c27c 5645 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5646 if (status != 0)
9a99af49
TM		 5647 goto out;
5648 down_read(&nfsi->rwsem);
5649 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5650 status = -NFS4ERR_DELAY;
01c3b861 5651 goto out_unlock;
9a99af49 5652 }
6bfc93ef 5653 /* Note: we always want to sleep here! */
01c3b861 5654 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5655 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5656 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5657 "manager!\n", __func__);
01c3b861 5658out_unlock:
19e03c57 5659 up_read(&nfsi->rwsem);
01c3b861
TM		 5660out:
5661 request->fl_flags = fl_flags;
1da177e4
LT		 5662 return status;
5663}
5664
5665static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5666{
a1d0b5ee
TM		 5667 struct nfs4_exception exception = {
5668 .state = state,
05ffe24f 5669 .inode = state->inode,
a1d0b5ee 5670 };
1da177e4
LT		 5671 int err;
5672
5673 do {
965b5d67 5674 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5675 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5676 if (err == -NFS4ERR_DENIED)
5677 err = -EAGAIN;
1da177e4 5678 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5679 err, &exception);
1da177e4
LT		 5680 } while (exception.retry);
5681 return err;
5682}
5683
5684static int
5685nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5686{
5687 struct nfs_open_context *ctx;
5688 struct nfs4_state *state;
5689 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5690 int status;
5691
5692 /* verify open state */
cd3758e3 5693 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5694 state = ctx->state;
5695
5696 if (request->fl_start < 0 || request->fl_end < 0)
5697 return -EINVAL;
5698
d953126a
TM		 5699 if (IS_GETLK(cmd)) {
5700 if (state != NULL)
5701 return nfs4_proc_getlk(state, F_GETLK, request);
5702 return 0;
5703 }
1da177e4
LT		 5704
5705 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5706 return -EINVAL;
5707
d953126a
TM		 5708 if (request->fl_type == F_UNLCK) {
5709 if (state != NULL)
5710 return nfs4_proc_unlck(state, cmd, request);
5711 return 0;
5712 }
1da177e4 5713
d953126a
TM		 5714 if (state == NULL)
5715 return -ENOLCK;
55725513
TM		 5716 /*
5717 * Don't rely on the VFS having checked the file open mode,
5718 * since it won't do this for flock() locks.
5719 */
f44106e2 5720 switch (request->fl_type) {
55725513
TM		 5721 case F_RDLCK:
5722 if (!(filp->f_mode & FMODE_READ))
5723 return -EBADF;
5724 break;
5725 case F_WRLCK:
5726 if (!(filp->f_mode & FMODE_WRITE))
5727 return -EBADF;
5728 }
5729
1da177e4
LT		 5730 do {
5731 status = nfs4_proc_setlk(state, cmd, request);
5732 if ((status != -EAGAIN) || IS_SETLK(cmd))
5733 break;
5734 timeout = nfs4_set_lock_task_retry(timeout);
5735 status = -ERESTARTSYS;
5736 if (signalled())
5737 break;
5738 } while(status < 0);
1da177e4
LT		 5739 return status;
5740}
5741
db4f2e63 5742int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5743{
5744 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5745 int err;
5746
5747 err = nfs4_set_lock_state(state, fl);
5748 if (err != 0)
db4f2e63 5749 return err;
4a706fa0 5750 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5751 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5752}
6b3b5496 5753
cf470c3e
TM		 5754struct nfs_release_lockowner_data {
5755 struct nfs4_lock_state *lsp;
5ae67c4f 5756 struct nfs_server *server;
cf470c3e 5757 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5758 struct nfs4_sequence_args seq_args;
5759 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5760};
5761
fbd4bfd1
CL		 5762static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5763{
5764 struct nfs_release_lockowner_data *data = calldata;
5765 nfs40_setup_sequence(data->server,
5766 &data->seq_args, &data->seq_res, task);
5767}
5768
5769static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5770{
5771 struct nfs_release_lockowner_data *data = calldata;
5772 nfs40_sequence_done(task, &data->seq_res);
5773}
5774
d3c7b7cc
TM		 5775static void nfs4_release_lockowner_release(void *calldata)
5776{
cf470c3e 5777 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5778 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5779 kfree(calldata);
5780}
5781
17280175 5782static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5783 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5784 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5785 .rpc_release = nfs4_release_lockowner_release,
5786};
5787
c8b2d0bf 5788static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5789{
cf470c3e 5790 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5791 struct rpc_message msg = {
5792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5793 };
5794
5795 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5796 return -EINVAL;
fbd4bfd1 5797
cf470c3e
TM		 5798 data = kmalloc(sizeof(*data), GFP_NOFS);
5799 if (!data)
5800 return -ENOMEM;
fbd4bfd1 5801 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5802 data->lsp = lsp;
5ae67c4f 5803 data->server = server;
cf470c3e
TM		 5804 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5805 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5806 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5807
cf470c3e
TM		 5808 msg.rpc_argp = &data->args;
5809 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5810 return 0;
d3c7b7cc
TM		 5811}
5812
aa1870af
BF		 5813#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5814
64c2ce8b
AK		 5815static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5816 const void *buf, size_t buflen,
5817 int flags, int type)
6b3b5496 5818{
64c2ce8b
AK		 5819 if (strcmp(key, "") != 0)
5820 return -EINVAL;
4b580ee3 5821
64c2ce8b 5822 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5823}
5824
64c2ce8b
AK		 5825static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5826 void *buf, size_t buflen, int type)
6b3b5496 5827{
64c2ce8b
AK		 5828 if (strcmp(key, "") != 0)
5829 return -EINVAL;
aa1870af 5830
64c2ce8b 5831 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5832}
5833
64c2ce8b
AK		 5834static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5835 size_t list_len, const char *name,
5836 size_t name_len, int type)
6b3b5496 5837{
64c2ce8b 5838 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5839
096455a2
BF		 5840 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5841 return 0;
64c2ce8b
AK		 5842
5843 if (list && len <= list_len)
5844 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5845 return len;
6b3b5496
BF		 5846}
5847
c9bccef6
DQ		 5848#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5849static inline int nfs4_server_supports_labels(struct nfs_server *server)
5850{
5851 return server->caps & NFS_CAP_SECURITY_LABEL;
5852}
5853
5854static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5855 const void *buf, size_t buflen,
5856 int flags, int type)
5857{
5858 if (security_ismaclabel(key))
5859 return nfs4_set_security_label(dentry, buf, buflen);
5860
5861 return -EOPNOTSUPP;
5862}
5863
5864static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5865 void *buf, size_t buflen, int type)
5866{
5867 if (security_ismaclabel(key))
5868 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5869 return -EOPNOTSUPP;
5870}
5871
5872static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5873 size_t list_len, const char *name,
5874 size_t name_len, int type)
5875{
5876 size_t len = 0;
5877
5878 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5879 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5880 if (list && len <= list_len)
5881 security_inode_listsecurity(dentry->d_inode, list, len);
5882 }
5883 return len;
5884}
5885
5886static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5887 .prefix = XATTR_SECURITY_PREFIX,
5888 .list = nfs4_xattr_list_nfs4_label,
5889 .get = nfs4_xattr_get_nfs4_label,
5890 .set = nfs4_xattr_set_nfs4_label,
5891};
5892#endif
5893
5894
533eb461
AA		 5895/*
5896 * nfs_fhget will use either the mounted_on_fileid or the fileid
5897 */
69aaaae1
TM		 5898static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5899{
533eb461
AA		 5900 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5901 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5902 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5903 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5904 return;
5905
5906 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5907 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5908 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5909 fattr->nlink = 2;
5910}
5911
f05d147f
BS		 5912static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5913 const struct qstr *name,
5914 struct nfs4_fs_locations *fs_locations,
5915 struct page *page)
683b57b4
TM		 5916{
5917 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5918 u32 bitmask[3] = {
361e624f 5919 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5920 };
5921 struct nfs4_fs_locations_arg args = {
5922 .dir_fh = NFS_FH(dir),
c228fd3a 5923 .name = name,
683b57b4
TM		 5924 .page = page,
5925 .bitmask = bitmask,
5926 };
22958463
BH		 5927 struct nfs4_fs_locations_res res = {
5928 .fs_locations = fs_locations,
5929 };
683b57b4
TM		 5930 struct rpc_message msg = {
5931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5932 .rpc_argp = &args,
22958463 5933 .rpc_resp = &res,
683b57b4
TM		 5934 };
5935 int status;
5936
3110ff80 5937 dprintk("%s: start\n", __func__);
533eb461
AA		 5938
5939 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5940 * is not supported */
5941 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5942 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5943 else
5944 bitmask[0] |= FATTR4_WORD0_FILEID;
5945
c228fd3a 5946 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5947 fs_locations->server = server;
830b8e33 5948 fs_locations->nlocations = 0;
f05d147f 5949 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5950 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5951 return status;
5952}
5953
f05d147f
BS		 5954int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5955 const struct qstr *name,
5956 struct nfs4_fs_locations *fs_locations,
5957 struct page *page)
db0a9593
BS		 5958{
5959 struct nfs4_exception exception = { };
5960 int err;
5961 do {
078ea3df
TM		 5962 err = _nfs4_proc_fs_locations(client, dir, name,
5963 fs_locations, page);
5964 trace_nfs4_get_fs_locations(dir, name, err);
5965 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5966 &exception);
5967 } while (exception.retry);
5968 return err;
5969}
5970
5ec16a85 5971/**
a5250def
WAA		 5972 * If 'use_integrity' is true and the state managment nfs_client
5973 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5974 * and the machine credential as per RFC3530bis and RFC5661 Security
5975 * Considerations sections. Otherwise, just use the user cred with the
5976 * filesystem's rpc_client.
5ec16a85 5977 */
a5250def 5978static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5979{
5980 int status;
5981 struct nfs4_secinfo_arg args = {
5982 .dir_fh = NFS_FH(dir),
5983 .name = name,
5984 };
5985 struct nfs4_secinfo_res res = {
5986 .flavors = flavors,
5987 };
5988 struct rpc_message msg = {
5989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5990 .rpc_argp = &args,
5991 .rpc_resp = &res,
5992 };
a5250def
WAA		 5993 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
5994
5995 if (use_integrity) {
5996 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5997 msg.rpc_cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
5998 }
5a5ea0d4
BS		 5999
6000 dprintk("NFS call secinfo %s\n", name->name);
a5250def
WAA		 6001 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6002 &res.seq_res, 0);
5a5ea0d4 6003 dprintk("NFS reply secinfo: %d\n", status);
a5250def
WAA		 6004
6005 if (msg.rpc_cred)
6006 put_rpccred(msg.rpc_cred);
6007
5a5ea0d4
BS		 6008 return status;
6009}
6010
72de53ec
BS		 6011int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6012 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6013{
6014 struct nfs4_exception exception = { };
6015 int err;
6016 do {
a5250def
WAA		 6017 err = -NFS4ERR_WRONGSEC;
6018
6019 /* try to use integrity protection with machine cred */
6020 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6021 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6022
6023 /*
6024 * if unable to use integrity protection, or SECINFO with
6025 * integrity protection returns NFS4ERR_WRONGSEC (which is
6026 * disallowed by spec, but exists in deployed servers) use
6027 * the current filesystem's rpc_client and the user cred.
6028 */
6029 if (err == -NFS4ERR_WRONGSEC)
6030 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6031
078ea3df
TM		 6032 trace_nfs4_secinfo(dir, name, err);
6033 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6034 &exception);
6035 } while (exception.retry);
6036 return err;
6037}
6038
557134a3 6039#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6040/*
6041 * Check the exchange flags returned by the server for invalid flags, having
6042 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6043 * DS flags set.
6044 */
6045static int nfs4_check_cl_exchange_flags(u32 flags)
6046{
6047 if (flags & ~EXCHGID4_FLAG_MASK_R)
6048 goto out_inval;
6049 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6050 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6051 goto out_inval;
6052 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6053 goto out_inval;
6054 return NFS_OK;
6055out_inval:
6056 return -NFS4ERR_INVAL;
6057}
6058
78fe0f41 6059static bool
79d4e1f0
CL		 6060nfs41_same_server_scope(struct nfs41_server_scope *a,
6061 struct nfs41_server_scope *b)
78fe0f41
WAA		 6062{
6063 if (a->server_scope_sz == b->server_scope_sz &&
6064 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6065 return true;
6066
6067 return false;
6068}
6069
7c44f1ae
WAA		 6070/*
6071 * nfs4_proc_bind_conn_to_session()
6072 *
6073 * The 4.1 client currently uses the same TCP connection for the
6074 * fore and backchannel.
6075 */
2cf047c9 6076int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6077{
6078 int status;
6079 struct nfs41_bind_conn_to_session_res res;
6080 struct rpc_message msg = {
6081 .rpc_proc =
6082 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6083 .rpc_argp = clp,
6084 .rpc_resp = &res,
2cf047c9 6085 .rpc_cred = cred,
7c44f1ae
WAA		 6086 };
6087
6088 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6089
6090 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6091 if (unlikely(res.session == NULL)) {
6092 status = -ENOMEM;
6093 goto out;
6094 }
6095
6096 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6097 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6098 if (status == 0) {
6099 if (memcmp(res.session->sess_id.data,
6100 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6101 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6102 status = -EIO;
6103 goto out_session;
6104 }
6105 if (res.dir != NFS4_CDFS4_BOTH) {
6106 dprintk("NFS: %s: Unexpected direction from server\n",
6107 __func__);
6108 status = -EIO;
6109 goto out_session;
6110 }
6111 if (res.use_conn_in_rdma_mode) {
6112 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6113 __func__);
6114 status = -EIO;
6115 goto out_session;
6116 }
6117 }
6118out_session:
6119 kfree(res.session);
6120out:
6121 dprintk("<-- %s status= %d\n", __func__, status);
6122 return status;
6123}
6124
99fe60d0
BH		 6125/*
6126 * nfs4_proc_exchange_id()
6127 *
6bbb4ae8
CL		 6128 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6129 *
99fe60d0
BH		 6130 * Since the clientid has expired, all compounds using sessions
6131 * associated with the stale clientid will be returning
6132 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6133 * be in some phase of session reset.
6134 */
4d643d1d 6135int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 6136{
6137 nfs4_verifier verifier;
6138 struct nfs41_exchange_id_args args = {
cd93710e 6139 .verifier = &verifier,
99fe60d0 6140 .client = clp,
4f0b429d
TM		 6141 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6142 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6143 };
6144 struct nfs41_exchange_id_res res = {
32b01310 6145 0
99fe60d0
BH		 6146 };
6147 int status;
6148 struct rpc_message msg = {
6149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6150 .rpc_argp = &args,
6151 .rpc_resp = &res,
6152 .rpc_cred = cred,
6153 };
99fe60d0 6154
f092075d 6155 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6156 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6157 sizeof(args.id));
6bbb4ae8
CL		 6158 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6159 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6160 args.id_len, args.id);
99fe60d0 6161
acdeb69d 6162 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6163 GFP_NOFS);
acdeb69d 6164 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6165 status = -ENOMEM;
6166 goto out;
6167 }
78fe0f41 6168
79d4e1f0 6169 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6170 GFP_NOFS);
177313f1 6171 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6172 status = -ENOMEM;
acdeb69d 6173 goto out_server_owner;
abe9a6d5 6174 }
78fe0f41 6175
bbafffd2 6176 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6177 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6178 status = -ENOMEM;
6179 goto out_server_scope;
6180 }
6181
1bd714f2 6182 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6183 trace_nfs4_exchange_id(clp, status);
177313f1 6184 if (status == 0)
32b01310 6185 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6186
acdeb69d 6187 if (status == 0) {
32b01310
TM		 6188 clp->cl_clientid = res.clientid;
6189 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6190 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6191 clp->cl_seqid = res.seqid;
6192
acdeb69d
CL		 6193 kfree(clp->cl_serverowner);
6194 clp->cl_serverowner = res.server_owner;
6195 res.server_owner = NULL;
78fe0f41 6196
7d2ed9ac 6197 /* use the most recent implementation id */
59155546
CL		 6198 kfree(clp->cl_implid);
6199 clp->cl_implid = res.impl_id;
7d2ed9ac 6200
177313f1 6201 if (clp->cl_serverscope != NULL &&
79d4e1f0 6202 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6203 res.server_scope)) {
6204 dprintk("%s: server_scope mismatch detected\n",
6205 __func__);
6206 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6207 kfree(clp->cl_serverscope);
6208 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6209 }
6210
177313f1 6211 if (clp->cl_serverscope == NULL) {
79d4e1f0 6212 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6213 goto out;
6214 }
32b01310
TM		 6215 } else
6216 kfree(res.impl_id);
7d2ed9ac 6217
acdeb69d
CL		 6218out_server_owner:
6219 kfree(res.server_owner);
7d2ed9ac 6220out_server_scope:
abe9a6d5
WAA		 6221 kfree(res.server_scope);
6222out:
177313f1 6223 if (clp->cl_implid != NULL)
6bbb4ae8 6224 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6225 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6226 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6227 clp->cl_implid->date.seconds,
6228 clp->cl_implid->date.nseconds);
6bbb4ae8 6229 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6230 return status;
6231}
6232
66245539
TM		 6233static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6234 struct rpc_cred *cred)
6235{
6236 struct rpc_message msg = {
6237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6238 .rpc_argp = clp,
6239 .rpc_cred = cred,
6240 };
6241 int status;
6242
6243 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6244 trace_nfs4_destroy_clientid(clp, status);
66245539 6245 if (status)
02c67525 6246 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6247 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6248 return status;
6249}
6250
6251static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6252 struct rpc_cred *cred)
6253{
6254 unsigned int loop;
6255 int ret;
6256
6257 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6258 ret = _nfs4_proc_destroy_clientid(clp, cred);
6259 switch (ret) {
6260 case -NFS4ERR_DELAY:
6261 case -NFS4ERR_CLIENTID_BUSY:
6262 ssleep(1);
6263 break;
6264 default:
6265 return ret;
6266 }
6267 }
6268 return 0;
6269}
6270
6271int nfs4_destroy_clientid(struct nfs_client *clp)
6272{
6273 struct rpc_cred *cred;
6274 int ret = 0;
6275
6276 if (clp->cl_mvops->minor_version < 1)
6277 goto out;
6278 if (clp->cl_exchange_flags == 0)
6279 goto out;
05f4c350
CL		 6280 if (clp->cl_preserve_clid)
6281 goto out;
73d8bde5 6282 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6283 ret = nfs4_proc_destroy_clientid(clp, cred);
6284 if (cred)
6285 put_rpccred(cred);
6286 switch (ret) {
6287 case 0:
6288 case -NFS4ERR_STALE_CLIENTID:
6289 clp->cl_exchange_flags = 0;
6290 }
6291out:
6292 return ret;
6293}
6294
2050f0cc
AA		 6295struct nfs4_get_lease_time_data {
6296 struct nfs4_get_lease_time_args *args;
6297 struct nfs4_get_lease_time_res *res;
6298 struct nfs_client *clp;
6299};
6300
6301static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6302 void *calldata)
6303{
2050f0cc
AA		 6304 struct nfs4_get_lease_time_data *data =
6305 (struct nfs4_get_lease_time_data *)calldata;
6306
6307 dprintk("--> %s\n", __func__);
6308 /* just setup sequence, do not trigger session recovery
6309 since we're invoked within one */
d9afbd1b
TM		 6310 nfs41_setup_sequence(data->clp->cl_session,
6311 &data->args->la_seq_args,
6312 &data->res->lr_seq_res,
6313 task);
2050f0cc
AA		 6314 dprintk("<-- %s\n", __func__);
6315}
6316
6317/*
6318 * Called from nfs4_state_manager thread for session setup, so don't recover
6319 * from sequence operation or clientid errors.
6320 */
6321static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6322{
6323 struct nfs4_get_lease_time_data *data =
6324 (struct nfs4_get_lease_time_data *)calldata;
6325
6326 dprintk("--> %s\n", __func__);
14516c3a
TM		 6327 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6328 return;
2050f0cc
AA		 6329 switch (task->tk_status) {
6330 case -NFS4ERR_DELAY:
6331 case -NFS4ERR_GRACE:
6332 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6333 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6334 task->tk_status = 0;
a8a4ae3a
AA		 6335 /* fall through */
6336 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6337 rpc_restart_call_prepare(task);
2050f0cc
AA		 6338 return;
6339 }
2050f0cc
AA		 6340 dprintk("<-- %s\n", __func__);
6341}
6342
17280175 6343static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6344 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6345 .rpc_call_done = nfs4_get_lease_time_done,
6346};
6347
6348int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6349{
6350 struct rpc_task *task;
6351 struct nfs4_get_lease_time_args args;
6352 struct nfs4_get_lease_time_res res = {
6353 .lr_fsinfo = fsinfo,
6354 };
6355 struct nfs4_get_lease_time_data data = {
6356 .args = &args,
6357 .res = &res,
6358 .clp = clp,
6359 };
6360 struct rpc_message msg = {
6361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6362 .rpc_argp = &args,
6363 .rpc_resp = &res,
6364 };
6365 struct rpc_task_setup task_setup = {
6366 .rpc_client = clp->cl_rpcclient,
6367 .rpc_message = &msg,
6368 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6369 .callback_data = &data,
6370 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6371 };
6372 int status;
6373
a9c92d6b 6374 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6375 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6376 dprintk("--> %s\n", __func__);
6377 task = rpc_run_task(&task_setup);
6378
6379 if (IS_ERR(task))
6380 status = PTR_ERR(task);
6381 else {
6382 status = task->tk_status;
6383 rpc_put_task(task);
6384 }
6385 dprintk("<-- %s return %d\n", __func__, status);
6386
6387 return status;
6388}
6389
fc931582
AA		 6390/*
6391 * Initialize the values to be used by the client in CREATE_SESSION
6392 * If nfs4_init_session set the fore channel request and response sizes,
6393 * use them.
6394 *
6395 * Set the back channel max_resp_sz_cached to zero to force the client to
6396 * always set csa_cachethis to FALSE because the current implementation
6397 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6398 */
6399static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6400{
18aad3d5
AA		 6401 unsigned int max_rqst_sz, max_resp_sz;
6402
6403 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6404 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6405
fc931582 6406 /* Fore channel attributes */
18aad3d5
AA		 6407 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6408 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6409 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6410 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6411
6412 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6413 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6414 __func__,
6415 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6416 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6417
6418 /* Back channel attributes */
fc931582
AA		 6419 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6420 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6421 args->bc_attrs.max_resp_sz_cached = 0;
6422 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6423 args->bc_attrs.max_reqs = 1;
6424
6425 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6426 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6427 __func__,
6428 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6429 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6430 args->bc_attrs.max_reqs);
6431}
6432
43c2e885 6433static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6434{
43c2e885
BF		 6435 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6436 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6437
43c2e885
BF		 6438 if (rcvd->max_resp_sz > sent->max_resp_sz)
6439 return -EINVAL;
6440 /*
6441 * Our requested max_ops is the minimum we need; we're not
6442 * prepared to break up compounds into smaller pieces than that.
6443 * So, no point even trying to continue if the server won't
6444 * cooperate:
6445 */
6446 if (rcvd->max_ops < sent->max_ops)
6447 return -EINVAL;
6448 if (rcvd->max_reqs == 0)
6449 return -EINVAL;
b4b9a0c1
VG		 6450 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6451 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6452 return 0;
8d35301d
AA		 6453}
6454
43c2e885
BF		 6455static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6456{
6457 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6458 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6459
43c2e885
BF		 6460 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6461 return -EINVAL;
6462 if (rcvd->max_resp_sz < sent->max_resp_sz)
6463 return -EINVAL;
6464 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6465 return -EINVAL;
6466 /* These would render the backchannel useless: */
b4b9a0c1 6467 if (rcvd->max_ops != sent->max_ops)
43c2e885 6468 return -EINVAL;
b4b9a0c1 6469 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6470 return -EINVAL;
6471 return 0;
6472}
8d35301d 6473
8d35301d
AA		 6474static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6475 struct nfs4_session *session)
6476{
43c2e885 6477 int ret;
8d35301d 6478
43c2e885
BF		 6479 ret = nfs4_verify_fore_channel_attrs(args, session);
6480 if (ret)
6481 return ret;
6482 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6483}
6484
848f5bda
TM		 6485static int _nfs4_proc_create_session(struct nfs_client *clp,
6486 struct rpc_cred *cred)
fc931582
AA		 6487{
6488 struct nfs4_session *session = clp->cl_session;
6489 struct nfs41_create_session_args args = {
6490 .client = clp,
6491 .cb_program = NFS4_CALLBACK,
6492 };
6493 struct nfs41_create_session_res res = {
6494 .client = clp,
6495 };
6496 struct rpc_message msg = {
6497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6498 .rpc_argp = &args,
6499 .rpc_resp = &res,
848f5bda 6500 .rpc_cred = cred,
fc931582
AA		 6501 };
6502 int status;
6503
6504 nfs4_init_channel_attrs(&args);
0f91421e 6505 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6506
1bd714f2 6507 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6508 trace_nfs4_create_session(clp, status);
fc931582 6509
43095d39 6510 if (!status) {
8d35301d
AA		 6511 /* Verify the session's negotiated channel_attrs values */
6512 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6513 /* Increment the clientid slot sequence id */
6514 clp->cl_seqid++;
6515 }
6516
6517 return status;
6518}
6519
6520/*
6521 * Issues a CREATE_SESSION operation to the server.
6522 * It is the responsibility of the caller to verify the session is
6523 * expired before calling this routine.
6524 */
848f5bda 6525int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6526{
6527 int status;
6528 unsigned *ptr;
fc931582
AA		 6529 struct nfs4_session *session = clp->cl_session;
6530
6531 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6532
848f5bda 6533 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6534 if (status)
6535 goto out;
6536
aacd5537
AA		 6537 /* Init or reset the session slot tables */
6538 status = nfs4_setup_session_slot_tables(session);
6539 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6540 if (status)
6541 goto out;
6542
6543 ptr = (unsigned *)&session->sess_id.data[0];
6544 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6545 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6546out:
6547 dprintk("<-- %s\n", __func__);
6548 return status;
6549}
6550
0f3e66c6
AA		 6551/*
6552 * Issue the over-the-wire RPC DESTROY_SESSION.
6553 * The caller must serialize access to this routine.
6554 */
848f5bda
TM		 6555int nfs4_proc_destroy_session(struct nfs4_session *session,
6556 struct rpc_cred *cred)
0f3e66c6 6557{
848f5bda
TM		 6558 struct rpc_message msg = {
6559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6560 .rpc_argp = session,
6561 .rpc_cred = cred,
6562 };
0f3e66c6 6563 int status = 0;
0f3e66c6
AA		 6564
6565 dprintk("--> nfs4_proc_destroy_session\n");
6566
6567 /* session is still being setup */
6568 if (session->clp->cl_cons_state != NFS_CS_READY)
6569 return status;
6570
1bd714f2 6571 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6572 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6573
6574 if (status)
08106ac7 6575 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6576 "Session has been destroyed regardless...\n", status);
6577
6578 dprintk("<-- nfs4_proc_destroy_session\n");
6579 return status;
6580}
6581
fc01cea9
AA		 6582/*
6583 * Renew the cl_session lease.
6584 */
d5f8d3fe
TM		 6585struct nfs4_sequence_data {
6586 struct nfs_client *clp;
6587 struct nfs4_sequence_args args;
6588 struct nfs4_sequence_res res;
6589};
6590
dc96aef9
AB		 6591static void nfs41_sequence_release(void *data)
6592{
d5f8d3fe
TM		 6593 struct nfs4_sequence_data *calldata = data;
6594 struct nfs_client *clp = calldata->clp;
dc96aef9 6595
7135840f
AB		 6596 if (atomic_read(&clp->cl_count) > 1)
6597 nfs4_schedule_state_renewal(clp);
6598 nfs_put_client(clp);
d5f8d3fe 6599 kfree(calldata);
dc96aef9
AB		 6600}
6601
aa5190d0
TM		 6602static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6603{
6604 switch(task->tk_status) {
6605 case -NFS4ERR_DELAY:
aa5190d0
TM		 6606 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6607 return -EAGAIN;
6608 default:
0400a6b0 6609 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6610 }
6611 return 0;
6612}
6613
dc96aef9 6614static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6615{
d5f8d3fe
TM		 6616 struct nfs4_sequence_data *calldata = data;
6617 struct nfs_client *clp = calldata->clp;
fc01cea9 6618
14516c3a
TM		 6619 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6620 return;
fc01cea9 6621
c6d01c6f 6622 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6623 if (task->tk_status < 0) {
6624 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6625 if (atomic_read(&clp->cl_count) == 1)
6626 goto out;
fc01cea9 6627
aa5190d0
TM		 6628 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6629 rpc_restart_call_prepare(task);
fc01cea9
AA		 6630 return;
6631 }
6632 }
fc01cea9 6633 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6634out:
fc01cea9
AA		 6635 dprintk("<-- %s\n", __func__);
6636}
6637
6638static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6639{
d5f8d3fe
TM		 6640 struct nfs4_sequence_data *calldata = data;
6641 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6642 struct nfs4_sequence_args *args;
6643 struct nfs4_sequence_res *res;
6644
fc01cea9
AA		 6645 args = task->tk_msg.rpc_argp;
6646 res = task->tk_msg.rpc_resp;
6647
d9afbd1b 6648 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6649}
6650
6651static const struct rpc_call_ops nfs41_sequence_ops = {
6652 .rpc_call_done = nfs41_sequence_call_done,
6653 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6654 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6655};
6656
8fe72bac
TM		 6657static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6658 struct rpc_cred *cred,
6659 bool is_privileged)
fc01cea9 6660{
d5f8d3fe 6661 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6662 struct rpc_message msg = {
6663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6664 .rpc_cred = cred,
6665 };
71ac6da9
TM		 6666 struct rpc_task_setup task_setup_data = {
6667 .rpc_client = clp->cl_rpcclient,
6668 .rpc_message = &msg,
8fe72bac 6669 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6670 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6671 };
fc01cea9 6672
7135840f 6673 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6674 return ERR_PTR(-EIO);
dfb4f309 6675 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6676 if (calldata == NULL) {
7135840f 6677 nfs_put_client(clp);
71ac6da9 6678 return ERR_PTR(-ENOMEM);
fc01cea9 6679 }
a9c92d6b 6680 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6681 if (is_privileged)
6682 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6683 msg.rpc_argp = &calldata->args;
6684 msg.rpc_resp = &calldata->res;
6685 calldata->clp = clp;
71ac6da9 6686 task_setup_data.callback_data = calldata;
fc01cea9 6687
71ac6da9
TM		 6688 return rpc_run_task(&task_setup_data);
6689}
6690
2f60ea6b 6691static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6692{
6693 struct rpc_task *task;
6694 int ret = 0;
6695
2f60ea6b
TM		 6696 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6697 return 0;
8fe72bac 6698 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6699 if (IS_ERR(task))
6700 ret = PTR_ERR(task);
6701 else
bf294b41 6702 rpc_put_task_async(task);
71ac6da9
TM		 6703 dprintk("<-- %s status=%d\n", __func__, ret);
6704 return ret;
6705}
6706
6707static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6708{
6709 struct rpc_task *task;
6710 int ret;
6711
8fe72bac 6712 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6713 if (IS_ERR(task)) {
6714 ret = PTR_ERR(task);
6715 goto out;
6716 }
6717 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6718 if (!ret) {
6719 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6720
6721 if (task->tk_status == 0)
6722 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6723 ret = task->tk_status;
b4410c2f 6724 }
71ac6da9
TM		 6725 rpc_put_task(task);
6726out:
6727 dprintk("<-- %s status=%d\n", __func__, ret);
6728 return ret;
fc01cea9
AA		 6729}
6730
fce5c838
RL		 6731struct nfs4_reclaim_complete_data {
6732 struct nfs_client *clp;
6733 struct nfs41_reclaim_complete_args arg;
6734 struct nfs41_reclaim_complete_res res;
6735};
6736
6737static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6738{
6739 struct nfs4_reclaim_complete_data *calldata = data;
6740
d9afbd1b
TM		 6741 nfs41_setup_sequence(calldata->clp->cl_session,
6742 &calldata->arg.seq_args,
6743 &calldata->res.seq_res,
6744 task);
fce5c838
RL		 6745}
6746
aa5190d0
TM		 6747static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6748{
6749 switch(task->tk_status) {
6750 case 0:
6751 case -NFS4ERR_COMPLETE_ALREADY:
6752 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6753 break;
6754 case -NFS4ERR_DELAY:
aa5190d0 6755 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6756 /* fall through */
6757 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6758 return -EAGAIN;
6759 default:
0400a6b0 6760 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6761 }
6762 return 0;
6763}
6764
fce5c838
RL		 6765static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6766{
6767 struct nfs4_reclaim_complete_data *calldata = data;
6768 struct nfs_client *clp = calldata->clp;
6769 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6770
6771 dprintk("--> %s\n", __func__);
14516c3a
TM		 6772 if (!nfs41_sequence_done(task, res))
6773 return;
fce5c838 6774
c6d01c6f 6775 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6776 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6777 rpc_restart_call_prepare(task);
6778 return;
6779 }
fce5c838
RL		 6780 dprintk("<-- %s\n", __func__);
6781}
6782
6783static void nfs4_free_reclaim_complete_data(void *data)
6784{
6785 struct nfs4_reclaim_complete_data *calldata = data;
6786
6787 kfree(calldata);
6788}
6789
6790static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6791 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6792 .rpc_call_done = nfs4_reclaim_complete_done,
6793 .rpc_release = nfs4_free_reclaim_complete_data,
6794};
6795
6796/*
6797 * Issue a global reclaim complete.
6798 */
965e9c23
TM		 6799static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6800 struct rpc_cred *cred)
fce5c838
RL		 6801{
6802 struct nfs4_reclaim_complete_data *calldata;
6803 struct rpc_task *task;
6804 struct rpc_message msg = {
6805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6806 .rpc_cred = cred,
fce5c838
RL		 6807 };
6808 struct rpc_task_setup task_setup_data = {
6809 .rpc_client = clp->cl_rpcclient,
6810 .rpc_message = &msg,
6811 .callback_ops = &nfs4_reclaim_complete_call_ops,
6812 .flags = RPC_TASK_ASYNC,
6813 };
6814 int status = -ENOMEM;
6815
6816 dprintk("--> %s\n", __func__);
8535b2be 6817 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6818 if (calldata == NULL)
6819 goto out;
6820 calldata->clp = clp;
6821 calldata->arg.one_fs = 0;
fce5c838 6822
a9c92d6b 6823 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6824 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6825 msg.rpc_argp = &calldata->arg;
6826 msg.rpc_resp = &calldata->res;
6827 task_setup_data.callback_data = calldata;
6828 task = rpc_run_task(&task_setup_data);
acf82b85 6829 if (IS_ERR(task)) {
fce5c838 6830 status = PTR_ERR(task);
acf82b85
DC		 6831 goto out;
6832 }
c34c32ea
AA		 6833 status = nfs4_wait_for_completion_rpc_task(task);
6834 if (status == 0)
6835 status = task->tk_status;
fce5c838 6836 rpc_put_task(task);
acf82b85 6837 return 0;
fce5c838
RL		 6838out:
6839 dprintk("<-- %s status=%d\n", __func__, status);
6840 return status;
6841}
b1f69b75
AA		 6842
6843static void
6844nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6845{
6846 struct nfs4_layoutget *lgp = calldata;
c31663d4 6847 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6848 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6849
6850 dprintk("--> %s\n", __func__);
c31663d4
FI		 6851 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6852 * right now covering the LAYOUTGET we are about to send.
6853 * However, that is not so catastrophic, and there seems
6854 * to be no way to prevent it completely.
6855 */
6ba7db34 6856 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6857 &lgp->res.seq_res, task))
b1f69b75 6858 return;
cf7d63f1
FI		 6859 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6860 NFS_I(lgp->args.inode)->layout,
6861 lgp->args.ctx->state)) {
6862 rpc_exit(task, NFS4_OK);
cf7d63f1 6863 }
b1f69b75
AA		 6864}
6865
6866static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6867{
6868 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6869 struct inode *inode = lgp->args.inode;
6870 struct nfs_server *server = NFS_SERVER(inode);
6871 struct pnfs_layout_hdr *lo;
6872 struct nfs4_state *state = NULL;
30005121 6873 unsigned long timeo, giveup;
b1f69b75
AA		 6874
6875 dprintk("--> %s\n", __func__);
6876
6ba7db34 6877 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6878 goto out;
b1f69b75
AA		 6879
6880 switch (task->tk_status) {
6881 case 0:
ee314c2a 6882 goto out;
b1f69b75
AA		 6883 case -NFS4ERR_LAYOUTTRYLATER:
6884 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6885 timeo = rpc_get_timeout(task->tk_client);
6886 giveup = lgp->args.timestamp + timeo;
6887 if (time_after(giveup, jiffies))
6888 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6889 break;
6890 case -NFS4ERR_EXPIRED:
6891 case -NFS4ERR_BAD_STATEID:
6892 spin_lock(&inode->i_lock);
6893 lo = NFS_I(inode)->layout;
6894 if (!lo || list_empty(&lo->plh_segs)) {
6895 spin_unlock(&inode->i_lock);
6896 /* If the open stateid was bad, then recover it. */
6897 state = lgp->args.ctx->state;
6898 } else {
6899 LIST_HEAD(head);
6900
6901 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6902 spin_unlock(&inode->i_lock);
6903 /* Mark the bad layout state as invalid, then
6904 * retry using the open stateid. */
6905 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6906 }
6907 }
ee314c2a
TM		 6908 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6909 rpc_restart_call_prepare(task);
6910out:
b1f69b75
AA		 6911 dprintk("<-- %s\n", __func__);
6912}
6913
8554116e
IK		 6914static size_t max_response_pages(struct nfs_server *server)
6915{
6916 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6917 return nfs_page_array_len(0, max_resp_sz);
6918}
6919
6920static void nfs4_free_pages(struct page **pages, size_t size)
6921{
6922 int i;
6923
6924 if (!pages)
6925 return;
6926
6927 for (i = 0; i < size; i++) {
6928 if (!pages[i])
6929 break;
6930 __free_page(pages[i]);
6931 }
6932 kfree(pages);
6933}
6934
6935static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6936{
6937 struct page **pages;
6938 int i;
6939
6940 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6941 if (!pages) {
6942 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6943 return NULL;
6944 }
6945
6946 for (i = 0; i < size; i++) {
6947 pages[i] = alloc_page(gfp_flags);
6948 if (!pages[i]) {
6949 dprintk("%s: failed to allocate page\n", __func__);
6950 nfs4_free_pages(pages, size);
6951 return NULL;
6952 }
6953 }
6954
6955 return pages;
6956}
6957
b1f69b75
AA		 6958static void nfs4_layoutget_release(void *calldata)
6959{
6960 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6961 struct inode *inode = lgp->args.inode;
6962 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6963 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6964
6965 dprintk("--> %s\n", __func__);
8554116e 6966 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6967 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6968 put_nfs_open_context(lgp->args.ctx);
6969 kfree(calldata);
6970 dprintk("<-- %s\n", __func__);
6971}
6972
6973static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6974 .rpc_call_prepare = nfs4_layoutget_prepare,
6975 .rpc_call_done = nfs4_layoutget_done,
6976 .rpc_release = nfs4_layoutget_release,
6977};
6978
a0b0a6e3
TM		 6979struct pnfs_layout_segment *
6980nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6981{
a47970ff
WAA		 6982 struct inode *inode = lgp->args.inode;
6983 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6984 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6985 struct rpc_task *task;
6986 struct rpc_message msg = {
6987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6988 .rpc_argp = &lgp->args,
6989 .rpc_resp = &lgp->res,
6ab59344 6990 .rpc_cred = lgp->cred,
b1f69b75
AA		 6991 };
6992 struct rpc_task_setup task_setup_data = {
6993 .rpc_client = server->client,
6994 .rpc_message = &msg,
6995 .callback_ops = &nfs4_layoutget_call_ops,
6996 .callback_data = lgp,
6997 .flags = RPC_TASK_ASYNC,
6998 };
a0b0a6e3 6999 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7000 int status = 0;
7001
7002 dprintk("--> %s\n", __func__);
7003
8554116e
IK		 7004 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7005 if (!lgp->args.layout.pages) {
7006 nfs4_layoutget_release(lgp);
a0b0a6e3 7007 return ERR_PTR(-ENOMEM);
8554116e
IK		 7008 }
7009 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7010 lgp->args.timestamp = jiffies;
8554116e 7011
35124a09 7012 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7013 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7014 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7015
7016 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7017 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7018
b1f69b75
AA		 7019 task = rpc_run_task(&task_setup_data);
7020 if (IS_ERR(task))
a0b0a6e3 7021 return ERR_CAST(task);
b1f69b75 7022 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7023 if (status == 0)
7024 status = task->tk_status;
1037e6ea
TM		 7025 trace_nfs4_layoutget(lgp->args.ctx,
7026 &lgp->args.range,
7027 &lgp->res.range,
7028 status);
085b7a45
WAA		 7029 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7030 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7031 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7032 rpc_put_task(task);
7033 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7034 if (status)
7035 return ERR_PTR(status);
7036 return lseg;
b1f69b75
AA		 7037}
7038
cbe82603
BH		 7039static void
7040nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7041{
7042 struct nfs4_layoutreturn *lrp = calldata;
7043
7044 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7045 nfs41_setup_sequence(lrp->clp->cl_session,
7046 &lrp->args.seq_args,
7047 &lrp->res.seq_res,
7048 task);
cbe82603
BH		 7049}
7050
7051static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7052{
7053 struct nfs4_layoutreturn *lrp = calldata;
7054 struct nfs_server *server;
7055
7056 dprintk("--> %s\n", __func__);
7057
6ba7db34 7058 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7059 return;
7060
7061 server = NFS_SERVER(lrp->args.inode);
7062 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7063 rpc_restart_call_prepare(task);
cbe82603
BH		 7064 return;
7065 }
cbe82603
BH		 7066 dprintk("<-- %s\n", __func__);
7067}
7068
7069static void nfs4_layoutreturn_release(void *calldata)
7070{
7071 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7072 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7073
7074 dprintk("--> %s\n", __func__);
849b286f
TM		 7075 spin_lock(&lo->plh_inode->i_lock);
7076 if (lrp->res.lrs_present)
7077 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7078 lo->plh_block_lgets--;
7079 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7080 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7081 kfree(calldata);
7082 dprintk("<-- %s\n", __func__);
7083}
7084
7085static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7086 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7087 .rpc_call_done = nfs4_layoutreturn_done,
7088 .rpc_release = nfs4_layoutreturn_release,
7089};
7090
7091int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7092{
7093 struct rpc_task *task;
7094 struct rpc_message msg = {
7095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7096 .rpc_argp = &lrp->args,
7097 .rpc_resp = &lrp->res,
9556000d 7098 .rpc_cred = lrp->cred,
cbe82603
BH		 7099 };
7100 struct rpc_task_setup task_setup_data = {
1771c577 7101 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7102 .rpc_message = &msg,
7103 .callback_ops = &nfs4_layoutreturn_call_ops,
7104 .callback_data = lrp,
7105 };
7106 int status;
7107
7108 dprintk("--> %s\n", __func__);
a9c92d6b 7109 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7110 task = rpc_run_task(&task_setup_data);
7111 if (IS_ERR(task))
7112 return PTR_ERR(task);
7113 status = task->tk_status;
1037e6ea 7114 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7115 dprintk("<-- %s status=%d\n", __func__, status);
7116 rpc_put_task(task);
7117 return status;
7118}
7119
7f11d8d3
AA		 7120/*
7121 * Retrieve the list of Data Server devices from the MDS.
7122 */
7123static int _nfs4_getdevicelist(struct nfs_server *server,
7124 const struct nfs_fh *fh,
7125 struct pnfs_devicelist *devlist)
7126{
7127 struct nfs4_getdevicelist_args args = {
7128 .fh = fh,
7129 .layoutclass = server->pnfs_curr_ld->id,
7130 };
7131 struct nfs4_getdevicelist_res res = {
7132 .devlist = devlist,
7133 };
7134 struct rpc_message msg = {
7135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7136 .rpc_argp = &args,
7137 .rpc_resp = &res,
7138 };
7139 int status;
7140
7141 dprintk("--> %s\n", __func__);
7142 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7143 &res.seq_res, 0);
7144 dprintk("<-- %s status=%d\n", __func__, status);
7145 return status;
7146}
7147
7148int nfs4_proc_getdevicelist(struct nfs_server *server,
7149 const struct nfs_fh *fh,
7150 struct pnfs_devicelist *devlist)
7151{
7152 struct nfs4_exception exception = { };
7153 int err;
7154
7155 do {
7156 err = nfs4_handle_exception(server,
7157 _nfs4_getdevicelist(server, fh, devlist),
7158 &exception);
7159 } while (exception.retry);
7160
7161 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7162 err, devlist->num_devs);
7163
7164 return err;
7165}
7166EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7167
b1f69b75 7168static int
cd5875fe
TM		 7169_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7170 struct pnfs_device *pdev,
7171 struct rpc_cred *cred)
b1f69b75
AA		 7172{
7173 struct nfs4_getdeviceinfo_args args = {
7174 .pdev = pdev,
7175 };
7176 struct nfs4_getdeviceinfo_res res = {
7177 .pdev = pdev,
7178 };
7179 struct rpc_message msg = {
7180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7181 .rpc_argp = &args,
7182 .rpc_resp = &res,
cd5875fe 7183 .rpc_cred = cred,
b1f69b75
AA		 7184 };
7185 int status;
7186
7187 dprintk("--> %s\n", __func__);
7c513058 7188 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7189 dprintk("<-- %s status=%d\n", __func__, status);
7190
7191 return status;
7192}
7193
cd5875fe
TM		 7194int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7195 struct pnfs_device *pdev,
7196 struct rpc_cred *cred)
b1f69b75
AA		 7197{
7198 struct nfs4_exception exception = { };
7199 int err;
7200
7201 do {
7202 err = nfs4_handle_exception(server,
cd5875fe 7203 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7204 &exception);
7205 } while (exception.retry);
7206 return err;
7207}
7208EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7209
863a3c6c
AA		 7210static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7211{
7212 struct nfs4_layoutcommit_data *data = calldata;
7213 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7214 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7215
d9afbd1b
TM		 7216 nfs41_setup_sequence(session,
7217 &data->args.seq_args,
7218 &data->res.seq_res,
7219 task);
863a3c6c
AA		 7220}
7221
7222static void
7223nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7224{
7225 struct nfs4_layoutcommit_data *data = calldata;
7226 struct nfs_server *server = NFS_SERVER(data->args.inode);
7227
6ba7db34 7228 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7229 return;
7230
7231 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7232 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7233 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7234 case -NFS4ERR_BADLAYOUT: /* no layout */
7235 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7236 task->tk_status = 0;
e59d27e0
TM		 7237 break;
7238 case 0:
863a3c6c
AA		 7239 nfs_post_op_update_inode_force_wcc(data->args.inode,
7240 data->res.fattr);
e59d27e0
TM		 7241 break;
7242 default:
7243 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7244 rpc_restart_call_prepare(task);
7245 return;
7246 }
7247 }
863a3c6c
AA		 7248}
7249
7250static void nfs4_layoutcommit_release(void *calldata)
7251{
7252 struct nfs4_layoutcommit_data *data = calldata;
7253
db29c089 7254 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7255 put_rpccred(data->cred);
7256 kfree(data);
7257}
7258
7259static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7260 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7261 .rpc_call_done = nfs4_layoutcommit_done,
7262 .rpc_release = nfs4_layoutcommit_release,
7263};
7264
7265int
ef311537 7266nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7267{
7268 struct rpc_message msg = {
7269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7270 .rpc_argp = &data->args,
7271 .rpc_resp = &data->res,
7272 .rpc_cred = data->cred,
7273 };
7274 struct rpc_task_setup task_setup_data = {
7275 .task = &data->task,
7276 .rpc_client = NFS_CLIENT(data->args.inode),
7277 .rpc_message = &msg,
7278 .callback_ops = &nfs4_layoutcommit_ops,
7279 .callback_data = data,
7280 .flags = RPC_TASK_ASYNC,
7281 };
7282 struct rpc_task *task;
7283 int status = 0;
7284
7285 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7286 "lbw: %llu inode %lu\n",
7287 data->task.tk_pid, sync,
7288 data->args.lastbytewritten,
7289 data->args.inode->i_ino);
7290
a9c92d6b 7291 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7292 task = rpc_run_task(&task_setup_data);
7293 if (IS_ERR(task))
7294 return PTR_ERR(task);
ef311537 7295 if (sync == false)
863a3c6c
AA		 7296 goto out;
7297 status = nfs4_wait_for_completion_rpc_task(task);
7298 if (status != 0)
7299 goto out;
7300 status = task->tk_status;
1037e6ea 7301 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7302out:
7303 dprintk("%s: status %d\n", __func__, status);
7304 rpc_put_task(task);
7305 return status;
7306}
fca78d6d 7307
97431204
AA		 7308/**
7309 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7310 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7311 */
fca78d6d
BS		 7312static int
7313_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7314 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7315{
7316 struct nfs41_secinfo_no_name_args args = {
7317 .style = SECINFO_STYLE_CURRENT_FH,
7318 };
7319 struct nfs4_secinfo_res res = {
7320 .flavors = flavors,
7321 };
7322 struct rpc_message msg = {
7323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7324 .rpc_argp = &args,
7325 .rpc_resp = &res,
7326 };
97431204
AA		 7327 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7328 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7329}
7330
7331static int
7332nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7333 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7334{
7335 struct nfs4_exception exception = { };
7336 int err;
7337 do {
7338 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7339 switch (err) {
7340 case 0:
7341 case -NFS4ERR_WRONGSEC:
7342 case -NFS4ERR_NOTSUPP:
05e9cfb4 7343 goto out;
fca78d6d
BS		 7344 default:
7345 err = nfs4_handle_exception(server, err, &exception);
7346 }
7347 } while (exception.retry);
05e9cfb4 7348out:
fca78d6d
BS		 7349 return err;
7350}
7351
7352static int
7353nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7354 struct nfs_fsinfo *info)
7355{
7356 int err;
7357 struct page *page;
7358 rpc_authflavor_t flavor;
7359 struct nfs4_secinfo_flavors *flavors;
7360
7361 page = alloc_page(GFP_KERNEL);
7362 if (!page) {
7363 err = -ENOMEM;
7364 goto out;
7365 }
7366
7367 flavors = page_address(page);
7368 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7369
7370 /*
7371 * Fall back on "guess and check" method if
7372 * the server doesn't support SECINFO_NO_NAME
7373 */
7374 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7375 err = nfs4_find_root_sec(server, fhandle, info);
7376 goto out_freepage;
7377 }
7378 if (err)
7379 goto out_freepage;
7380
7381 flavor = nfs_find_best_sec(flavors);
7382 if (err == 0)
7383 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7384
7385out_freepage:
7386 put_page(page);
7387 if (err == -EACCES)
7388 return -EPERM;
7389out:
7390 return err;
7391}
1cab0652 7392
ab7cb0df
TM		 7393static int _nfs41_test_stateid(struct nfs_server *server,
7394 nfs4_stateid *stateid,
7395 struct rpc_cred *cred)
7d974794
BS		 7396{
7397 int status;
7398 struct nfs41_test_stateid_args args = {
1cab0652 7399 .stateid = stateid,
7d974794
BS		 7400 };
7401 struct nfs41_test_stateid_res res;
7402 struct rpc_message msg = {
7403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7404 .rpc_argp = &args,
7405 .rpc_resp = &res,
ab7cb0df 7406 .rpc_cred = cred,
7d974794 7407 };
1cab0652 7408
38527b15 7409 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7410 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7411 nfs4_set_sequence_privileged(&args.seq_args);
7412 status = nfs4_call_sync_sequence(server->client, server, &msg,
7413 &args.seq_args, &res.seq_res);
38527b15
CL		 7414 if (status != NFS_OK) {
7415 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7416 return status;
38527b15
CL		 7417 }
7418 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7419 return -res.status;
7d974794
BS		 7420}
7421
38527b15
CL		 7422/**
7423 * nfs41_test_stateid - perform a TEST_STATEID operation
7424 *
7425 * @server: server / transport on which to perform the operation
7426 * @stateid: state ID to test
ab7cb0df 7427 * @cred: credential
38527b15
CL		 7428 *
7429 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7430 * Otherwise a negative NFS4ERR value is returned if the operation
7431 * failed or the state ID is not currently valid.
7432 */
ab7cb0df
TM		 7433static int nfs41_test_stateid(struct nfs_server *server,
7434 nfs4_stateid *stateid,
7435 struct rpc_cred *cred)
7d974794
BS		 7436{
7437 struct nfs4_exception exception = { };
7438 int err;
7439 do {
ab7cb0df 7440 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7441 if (err != -NFS4ERR_DELAY)
7442 break;
7443 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7444 } while (exception.retry);
7445 return err;
7446}
9aeda35f 7447
7c1d5fae
TM		 7448struct nfs_free_stateid_data {
7449 struct nfs_server *server;
7450 struct nfs41_free_stateid_args args;
9aeda35f 7451 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7452};
7453
7454static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7455{
7456 struct nfs_free_stateid_data *data = calldata;
7457 nfs41_setup_sequence(nfs4_get_session(data->server),
7458 &data->args.seq_args,
7459 &data->res.seq_res,
7460 task);
7461}
7462
7463static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7464{
7465 struct nfs_free_stateid_data *data = calldata;
7466
7467 nfs41_sequence_done(task, &data->res.seq_res);
7468
7469 switch (task->tk_status) {
7470 case -NFS4ERR_DELAY:
7471 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7472 rpc_restart_call_prepare(task);
7473 }
7474}
7475
7476static void nfs41_free_stateid_release(void *calldata)
7477{
7478 kfree(calldata);
7479}
7480
17f26b12 7481static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7482 .rpc_call_prepare = nfs41_free_stateid_prepare,
7483 .rpc_call_done = nfs41_free_stateid_done,
7484 .rpc_release = nfs41_free_stateid_release,
7485};
7486
7487static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7488 nfs4_stateid *stateid,
ab7cb0df 7489 struct rpc_cred *cred,
7c1d5fae
TM		 7490 bool privileged)
7491{
9aeda35f
BS		 7492 struct rpc_message msg = {
7493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7494 .rpc_cred = cred,
9aeda35f 7495 };
7c1d5fae
TM		 7496 struct rpc_task_setup task_setup = {
7497 .rpc_client = server->client,
7498 .rpc_message = &msg,
7499 .callback_ops = &nfs41_free_stateid_ops,
7500 .flags = RPC_TASK_ASYNC,
7501 };
7502 struct nfs_free_stateid_data *data;
9aeda35f 7503
38527b15 7504 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7505 data = kmalloc(sizeof(*data), GFP_NOFS);
7506 if (!data)
7507 return ERR_PTR(-ENOMEM);
7508 data->server = server;
7509 nfs4_stateid_copy(&data->args.stateid, stateid);
7510
7511 task_setup.callback_data = data;
7512
7513 msg.rpc_argp = &data->args;
7514 msg.rpc_resp = &data->res;
a9c92d6b 7515 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7516 if (privileged)
7517 nfs4_set_sequence_privileged(&data->args.seq_args);
7518
7519 return rpc_run_task(&task_setup);
9aeda35f
BS		 7520}
7521
38527b15
CL		 7522/**
7523 * nfs41_free_stateid - perform a FREE_STATEID operation
7524 *
7525 * @server: server / transport on which to perform the operation
7526 * @stateid: state ID to release
ab7cb0df 7527 * @cred: credential
38527b15
CL		 7528 *
7529 * Returns NFS_OK if the server freed "stateid". Otherwise a
7530 * negative NFS4ERR value is returned.
7531 */
ab7cb0df
TM		 7532static int nfs41_free_stateid(struct nfs_server *server,
7533 nfs4_stateid *stateid,
7534 struct rpc_cred *cred)
9aeda35f 7535{
7c1d5fae
TM		 7536 struct rpc_task *task;
7537 int ret;
7538
ab7cb0df 7539 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7540 if (IS_ERR(task))
7541 return PTR_ERR(task);
7542 ret = rpc_wait_for_completion_task(task);
7543 if (!ret)
7544 ret = task->tk_status;
7545 rpc_put_task(task);
7546 return ret;
9aeda35f 7547}
36281caa 7548
c8b2d0bf
TM		 7549static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7550{
7551 struct rpc_task *task;
ab7cb0df 7552 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7553
ab7cb0df 7554 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7555 nfs4_free_lock_state(server, lsp);
7556 if (IS_ERR(task))
7557 return PTR_ERR(task);
7558 rpc_put_task(task);
7559 return 0;
7560}
7561
36281caa
TM		 7562static bool nfs41_match_stateid(const nfs4_stateid *s1,
7563 const nfs4_stateid *s2)
7564{
2d2f24ad 7565 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7566 return false;
7567
2d2f24ad 7568 if (s1->seqid == s2->seqid)
36281caa 7569 return true;
2d2f24ad 7570 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7571 return true;
7572
7573 return false;
7574}
7575
557134a3
AA		 7576#endif /* CONFIG_NFS_V4_1 */
7577
36281caa
TM		 7578static bool nfs4_match_stateid(const nfs4_stateid *s1,
7579 const nfs4_stateid *s2)
7580{
f597c537 7581 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7582}
7583
7584
17280175 7585static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7586 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7587 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7588 .recover_open = nfs4_open_reclaim,
7589 .recover_lock = nfs4_lock_reclaim,
591d71cb 7590 .establish_clid = nfs4_init_clientid,
05f4c350 7591 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7592};
7593
591d71cb 7594#if defined(CONFIG_NFS_V4_1)
17280175 7595static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7596 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7597 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7598 .recover_open = nfs4_open_reclaim,
7599 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7600 .establish_clid = nfs41_init_clientid,
fce5c838 7601 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7602 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7603};
7604#endif /* CONFIG_NFS_V4_1 */
7605
17280175 7606static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7607 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7608 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7609 .recover_open = nfs4_open_expired,
7610 .recover_lock = nfs4_lock_expired,
7611 .establish_clid = nfs4_init_clientid,
7612};
7613
7614#if defined(CONFIG_NFS_V4_1)
17280175 7615static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7616 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7617 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7618 .recover_open = nfs41_open_expired,
7619 .recover_lock = nfs41_lock_expired,
4d643d1d 7620 .establish_clid = nfs41_init_clientid,
1da177e4 7621};
591d71cb 7622#endif /* CONFIG_NFS_V4_1 */
1da177e4 7623
17280175 7624static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7625 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7626 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7627 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7628};
7629
7630#if defined(CONFIG_NFS_V4_1)
17280175 7631static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7632 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7633 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7634 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7635};
7636#endif
7637
97dc1359
TM		 7638static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7639 .minor_version = 0,
39c6daae
TM		 7640 .init_caps = NFS_CAP_READDIRPLUS
7641 | NFS_CAP_ATOMIC_OPEN
7642 | NFS_CAP_CHANGE_ATTR
7643 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 7644 .init_client = nfs40_init_client,
7645 .shutdown_client = nfs40_shutdown_client,
36281caa 7646 .match_stateid = nfs4_match_stateid,
fca78d6d 7647 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7648 .free_lock_state = nfs4_release_lockowner,
9915ea7e 7649 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 7650 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7651 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7652 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7653};
7654
7655#if defined(CONFIG_NFS_V4_1)
7656static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7657 .minor_version = 1,
39c6daae
TM		 7658 .init_caps = NFS_CAP_READDIRPLUS
7659 | NFS_CAP_ATOMIC_OPEN
7660 | NFS_CAP_CHANGE_ATTR
3b66486c 7661 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7662 | NFS_CAP_STATEID_NFSV41
7663 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7664 .init_client = nfs41_init_client,
7665 .shutdown_client = nfs41_shutdown_client,
36281caa 7666 .match_stateid = nfs41_match_stateid,
fca78d6d 7667 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7668 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7669 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 7670 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7671 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7672 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7673};
7674#endif
7675
42c2c424
SD		 7676#if defined(CONFIG_NFS_V4_2)
7677static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7678 .minor_version = 2,
7017310a
BS		 7679 .init_caps = NFS_CAP_READDIRPLUS
7680 | NFS_CAP_ATOMIC_OPEN
7681 | NFS_CAP_CHANGE_ATTR
7682 | NFS_CAP_POSIX_LOCK
7683 | NFS_CAP_STATEID_NFSV41
7684 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7685 .init_client = nfs41_init_client,
7686 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 7687 .match_stateid = nfs41_match_stateid,
7688 .find_root_sec = nfs41_find_root_sec,
7017310a 7689 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7690 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 7691 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7692 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7693 .state_renewal_ops = &nfs41_state_renewal_ops,
7694};
7695#endif
7696
97dc1359
TM		 7697const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7698 [0] = &nfs_v4_0_minor_ops,
7699#if defined(CONFIG_NFS_V4_1)
7700 [1] = &nfs_v4_1_minor_ops,
7701#endif
42c2c424
SD		 7702#if defined(CONFIG_NFS_V4_2)
7703 [2] = &nfs_v4_2_minor_ops,
7704#endif
97dc1359
TM		 7705};
7706
17f26b12 7707static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7708 .create = nfs_create,
7709 .lookup = nfs_lookup,
7710 .atomic_open = nfs_atomic_open,
7711 .link = nfs_link,
7712 .unlink = nfs_unlink,
7713 .symlink = nfs_symlink,
7714 .mkdir = nfs_mkdir,
7715 .rmdir = nfs_rmdir,
7716 .mknod = nfs_mknod,
7717 .rename = nfs_rename,
7718 .permission = nfs_permission,
7719 .getattr = nfs_getattr,
7720 .setattr = nfs_setattr,
7721 .getxattr = generic_getxattr,
7722 .setxattr = generic_setxattr,
7723 .listxattr = generic_listxattr,
7724 .removexattr = generic_removexattr,
7725};
7726
92e1d5be 7727static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7728 .permission = nfs_permission,
7729 .getattr = nfs_getattr,
7730 .setattr = nfs_setattr,
64c2ce8b
AK		 7731 .getxattr = generic_getxattr,
7732 .setxattr = generic_setxattr,
7733 .listxattr = generic_listxattr,
7734 .removexattr = generic_removexattr,
6b3b5496
BF		 7735};
7736
509de811 7737const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7738 .version = 4, /* protocol version */
7739 .dentry_ops = &nfs4_dentry_operations,
7740 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7741 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7742 .file_ops = &nfs4_file_operations,
1da177e4 7743 .getroot = nfs4_proc_get_root,
281cad46 7744 .submount = nfs4_submount,
ff9099f2 7745 .try_mount = nfs4_try_mount,
1da177e4
LT		 7746 .getattr = nfs4_proc_getattr,
7747 .setattr = nfs4_proc_setattr,
7748 .lookup = nfs4_proc_lookup,
7749 .access = nfs4_proc_access,
7750 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7751 .create = nfs4_proc_create,
7752 .remove = nfs4_proc_remove,
7753 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7754 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7755 .unlink_done = nfs4_proc_unlink_done,
7756 .rename = nfs4_proc_rename,
d3d4152a 7757 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7758 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7759 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7760 .link = nfs4_proc_link,
7761 .symlink = nfs4_proc_symlink,
7762 .mkdir = nfs4_proc_mkdir,
7763 .rmdir = nfs4_proc_remove,
7764 .readdir = nfs4_proc_readdir,
7765 .mknod = nfs4_proc_mknod,
7766 .statfs = nfs4_proc_statfs,
7767 .fsinfo = nfs4_proc_fsinfo,
7768 .pathconf = nfs4_proc_pathconf,
e9326dca 7769 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7770 .decode_dirent = nfs4_decode_dirent,
7771 .read_setup = nfs4_proc_read_setup,
1abb5088 7772 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7773 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7774 .read_done = nfs4_read_done,
1da177e4 7775 .write_setup = nfs4_proc_write_setup,
57208fa7 7776 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7777 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7778 .write_done = nfs4_write_done,
1da177e4 7779 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7780 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7781 .commit_done = nfs4_commit_done,
1da177e4 7782 .lock = nfs4_proc_lock,
e50a1c2e 7783 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7784 .close_context = nfs4_close_context,
2b484297 7785 .open_context = nfs4_atomic_open,
011e2a7f 7786 .have_delegation = nfs4_have_delegation,
57ec14c5 7787 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7788 .alloc_client = nfs4_alloc_client,
45a52a02 7789 .init_client = nfs4_init_client,
cdb7eced 7790 .free_client = nfs4_free_client,
1179acc6
BS		 7791 .create_server = nfs4_create_server,
7792 .clone_server = nfs_clone_server,
1da177e4
LT		 7793};
7794
64c2ce8b
AK		 7795static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7796 .prefix = XATTR_NAME_NFSV4_ACL,
7797 .list = nfs4_xattr_list_nfs4_acl,
7798 .get = nfs4_xattr_get_nfs4_acl,
7799 .set = nfs4_xattr_set_nfs4_acl,
7800};
7801
7802const struct xattr_handler *nfs4_xattr_handlers[] = {
7803 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7804#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7805 &nfs4_xattr_nfs4_label_handler,
7806#endif
64c2ce8b
AK		 7807 NULL
7808};
7809
1da177e4
LT		 7810/*
7811 * Local variables:
7812 * c-basic-offset: 8
7813 * End:
7814 */
Linux 6.x block layer and io_uring tree(s)