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NFS: Add migration recovery callouts in nfs4proc.c
[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 154 case -NFS4ERR_WRONGSEC:
8897538e 155 case -NFS4ERR_WRONG_CRED:
7ebb9315 156 return -EPERM;
3ddeb7c5
TM		 157 case -NFS4ERR_BADOWNER:
158 case -NFS4ERR_BADNAME:
159 return -EINVAL;
fb13bfa7
TM		 160 case -NFS4ERR_SHARE_DENIED:
161 return -EACCES;
f25efd85
SD		 162 case -NFS4ERR_MINOR_VERS_MISMATCH:
163 return -EPROTONOSUPPORT;
6168f62c
WAA		 164 case -NFS4ERR_ACCESS:
165 return -EACCES;
6e3cf241
TM		 166 case -NFS4ERR_FILE_OPEN:
167 return -EBUSY;
52567b03 168 default:
1da177e4 169 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 170 __func__, -err);
52567b03 171 break;
1da177e4 172 }
52567b03 173 return -EIO;
1da177e4
LT		 174}
175
176/*
177 * This is our standard bitmap for GETATTR requests.
178 */
1549210f 179const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID,
185 FATTR4_WORD1_MODE
186 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER
188 | FATTR4_WORD1_OWNER_GROUP
189 | FATTR4_WORD1_RAWDEV
190 | FATTR4_WORD1_SPACE_USED
191 | FATTR4_WORD1_TIME_ACCESS
192 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 193 | FATTR4_WORD1_TIME_MODIFY,
194#ifdef CONFIG_NFS_V4_SECURITY_LABEL
195 FATTR4_WORD2_SECURITY_LABEL
196#endif
1da177e4
LT		 197};
198
1549210f
TM		 199static const u32 nfs4_pnfs_open_bitmap[3] = {
200 FATTR4_WORD0_TYPE
201 | FATTR4_WORD0_CHANGE
202 | FATTR4_WORD0_SIZE
203 | FATTR4_WORD0_FSID
204 | FATTR4_WORD0_FILEID,
205 FATTR4_WORD1_MODE
206 | FATTR4_WORD1_NUMLINKS
207 | FATTR4_WORD1_OWNER
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY,
214 FATTR4_WORD2_MDSTHRESHOLD
215};
216
e23008ec
AA		 217static const u32 nfs4_open_noattr_bitmap[3] = {
218 FATTR4_WORD0_TYPE
219 | FATTR4_WORD0_CHANGE
220 | FATTR4_WORD0_FILEID,
221};
222
a09df2ca 223const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 224 FATTR4_WORD0_FILES_AVAIL
225 | FATTR4_WORD0_FILES_FREE
226 | FATTR4_WORD0_FILES_TOTAL,
227 FATTR4_WORD1_SPACE_AVAIL
228 | FATTR4_WORD1_SPACE_FREE
229 | FATTR4_WORD1_SPACE_TOTAL
230};
231
a09df2ca 232const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 233 FATTR4_WORD0_MAXLINK
234 | FATTR4_WORD0_MAXNAME,
235 0
236};
237
dae100c2 238const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 239 | FATTR4_WORD0_MAXREAD
240 | FATTR4_WORD0_MAXWRITE
241 | FATTR4_WORD0_LEASE_TIME,
55b6e774 242 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 243 | FATTR4_WORD1_FS_LAYOUT_TYPES,
244 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
4e769b93 301 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
4e769b93 313 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
65de872e
TM		 320static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
321{
322 int res = 0;
323
324 might_sleep();
325
326 if (*timeout <= 0)
327 *timeout = NFS4_POLL_RETRY_MIN;
328 if (*timeout > NFS4_POLL_RETRY_MAX)
329 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 330 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 331 if (fatal_signal_pending(current))
332 res = -ERESTARTSYS;
333 *timeout <<= 1;
334 return res;
335}
336
337/* This is the error handling routine for processes that are allowed
338 * to sleep.
339 */
b064eca2 340static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 341{
342 struct nfs_client *clp = server->nfs_client;
9e33bed5 343 struct nfs4_state *state = exception->state;
3114ea7a 344 struct inode *inode = exception->inode;
65de872e
TM		 345 int ret = errorcode;
346
347 exception->retry = 0;
348 switch(errorcode) {
349 case 0:
350 return 0;
3114ea7a 351 case -NFS4ERR_OPENMODE:
011e2a7f 352 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 353 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 354 exception->retry = 1;
355 return 0;
356 }
357 if (state == NULL)
358 break;
5d422301
TM		 359 ret = nfs4_schedule_stateid_recovery(server, state);
360 if (ret < 0)
361 break;
3114ea7a 362 goto wait_on_recovery;
a1d0b5ee 363 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 364 case -NFS4ERR_ADMIN_REVOKED:
365 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 366 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
367 nfs_remove_bad_delegation(inode);
368 exception->retry = 1;
369 break;
370 }
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
542 if (!RPC_WAS_SENT(task))
543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
dfb4f309 564 if (!res->sr_slot) {
13615871
AA		 565 /* just wake up the next guy waiting since
566 * we may have not consumed a slot after all */
691daf3b 567 dprintk("%s: No slot\n", __func__);
35dc1d74 568 return;
13615871 569 }
e3725ec0
TM		 570 tbl = res->sr_slot->table;
571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
b75ad4cd
TM		 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
f4af6e2a 584 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
14516c3a 595static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
933602e3 598 struct nfs4_slot *slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
933602e3 607 slot = res->sr_slot;
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c
AA		 694}
695
14516c3a
TM		 696static int nfs4_sequence_done(struct rpc_task *task,
697 struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455
TM		 704}
705
dc70d7b3 706int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 707 struct nfs4_sequence_args *args,
708 struct nfs4_sequence_res *res,
ce5039c1
AA		 709 struct rpc_task *task)
710{
fbcd4abc
AA		 711 struct nfs4_slot *slot;
712 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 713
714 dprintk("--> %s\n", __func__);
ce5039c1 715 /* slot already allocated? */
dfb4f309 716 if (res->sr_slot != NULL)
d9afbd1b 717 goto out_success;
ce5039c1 718
fbcd4abc
AA		 719 tbl = &session->fc_slot_table;
720
69d206b5
TM		 721 task->tk_timeout = 0;
722
fbcd4abc 723 spin_lock(&tbl->slot_tbl_lock);
774d5f14 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 725 !args->sa_privileged) {
0b1c8fc4 726 /* The state manager will wait until the slot table is empty */
0b1c8fc4 727 dprintk("%s session is draining\n", __func__);
7b939a3f 728 goto out_sleep;
689cf5c1
AB		 729 }
730
2dc03b7f 731 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 732 if (IS_ERR(slot)) {
733 /* If out of memory, try again in 1/4 second */
734 if (slot == ERR_PTR(-ENOMEM))
735 task->tk_timeout = HZ >> 2;
fbcd4abc 736 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 737 goto out_sleep;
fbcd4abc
AA		 738 }
739 spin_unlock(&tbl->slot_tbl_lock);
740
2b2fa717 741 args->sa_slot = slot;
fbcd4abc 742
e8d92382 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 744 slot->slot_nr, slot->seq_nr);
fbcd4abc 745
dfb4f309 746 res->sr_slot = slot;
8e63b6a8 747 res->sr_timestamp = jiffies;
2a6e26cd 748 res->sr_status_flags = 0;
fbcd4abc
AA		 749 /*
750 * sr_status is only set in decode_sequence, and so will remain
751 * set to 1 if an rpc level failure occurs.
752 */
753 res->sr_status = 1;
2f92ae34 754 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 755out_success:
756 rpc_call_start(task);
ce5039c1 757 return 0;
7b939a3f 758out_sleep:
8fe72bac
TM		 759 /* Privileged tasks are queued with top priority */
760 if (args->sa_privileged)
1e1093c7
TM		 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
762 NULL, RPC_PRIORITY_PRIVILEGED);
763 else
764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 765 spin_unlock(&tbl->slot_tbl_lock);
766 return -EAGAIN;
ce5039c1 767}
dc70d7b3 768EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 769
5a580e0a
CL		 770static int nfs4_setup_sequence(const struct nfs_server *server,
771 struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res,
773 struct rpc_task *task)
ce5039c1 774{
035168ab 775 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 776 int ret = 0;
777
3bd2384a
CL		 778 if (!session)
779 return nfs40_setup_sequence(server, args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
3bd2384a 820 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 821}
822
823static int nfs4_sequence_done(struct rpc_task *task,
824 struct nfs4_sequence_res *res)
825{
3bd2384a 826 return nfs40_sequence_done(task, res);
9915ea7e 827}
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
fd0c0953 880static
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1073 kfree(p);
1074}
1075
1076static void nfs4_opendata_put(struct nfs4_opendata *p)
1077{
1078 if (p != NULL)
1079 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1080}
1081
06f814a3
TM		 1082static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1083{
06f814a3
TM		 1084 int ret;
1085
06f814a3 1086 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1087 return ret;
1088}
1089
dc0b027d 1090static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1091{
1092 int ret = 0;
dc0b027d 1093
536e43d1 1094 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1095 goto out;
1096 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1097 case FMODE_READ:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1099 && state->n_rdonly != 0;
6ee41268
TM		 1100 break;
1101 case FMODE_WRITE:
88069f77
TM		 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1103 && state->n_wronly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1107 && state->n_rdwr != 0;
6ee41268 1108 }
dc0b027d 1109out:
6ee41268
TM		 1110 return ret;
1111}
1112
dc0b027d 1113static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1114{
652f89f6
TM		 1115 if (delegation == NULL)
1116 return 0;
dc0b027d 1117 if ((delegation->type & fmode) != fmode)
aac00a8d 1118 return 0;
15c831bf 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1120 return 0;
d25be546
TM		 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 return 0;
b7391f44 1123 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1124 return 1;
1125}
1126
dc0b027d 1127static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1128{
dc0b027d 1129 switch (fmode) {
e7616923
TM		 1130 case FMODE_WRITE:
1131 state->n_wronly++;
1132 break;
1133 case FMODE_READ:
1134 state->n_rdonly++;
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 state->n_rdwr++;
1138 }
dc0b027d 1139 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1140}
1141
dc0b027d 1142static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1143{
1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1145 nfs4_stateid_copy(&state->stateid, stateid);
1146 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1147 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1148 switch (fmode) {
003707c7
TM		 1149 case FMODE_READ:
1150 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 break;
1152 case FMODE_WRITE:
1153 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 set_bit(NFS_O_RDWR_STATE, &state->flags);
1157 }
e7616923
TM		 1158}
1159
dc0b027d 1160static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1161{
8bda4e4c 1162 write_seqlock(&state->seqlock);
dc0b027d 1163 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1164 write_sequnlock(&state->seqlock);
003707c7
TM		 1165}
1166
dc0b027d 1167static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1168{
8bda4e4c
TM		 1169 /*
1170 * Protect the call to nfs4_state_set_mode_locked and
1171 * serialise the stateid update
1172 */
1173 write_seqlock(&state->seqlock);
003707c7 1174 if (deleg_stateid != NULL) {
f597c537 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1176 set_bit(NFS_DELEGATED_STATE, &state->flags);
1177 }
1178 if (open_stateid != NULL)
dc0b027d 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1180 write_sequnlock(&state->seqlock);
1181 spin_lock(&state->owner->so_lock);
dc0b027d 1182 update_open_stateflags(state, fmode);
ec073428 1183 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1184}
1185
dc0b027d 1186static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_delegation *deleg_cur;
1190 int ret = 0;
1191
dc0b027d 1192 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1193
1194 rcu_read_lock();
1195 deleg_cur = rcu_dereference(nfsi->delegation);
1196 if (deleg_cur == NULL)
1197 goto no_delegation;
1198
1199 spin_lock(&deleg_cur->lock);
17f26b12 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1202 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1203 goto no_delegation_unlock;
1204
1205 if (delegation == NULL)
1206 delegation = &deleg_cur->stateid;
f597c537 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1208 goto no_delegation_unlock;
1209
b7391f44 1210 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1212 ret = 1;
1213no_delegation_unlock:
1214 spin_unlock(&deleg_cur->lock);
1215no_delegation:
1216 rcu_read_unlock();
1217
1218 if (!ret && open_stateid != NULL) {
dc0b027d 1219 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1220 ret = 1;
1221 }
1222
1223 return ret;
1224}
1225
1226
dc0b027d 1227static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1228{
1229 struct nfs_delegation *delegation;
1230
1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1234 rcu_read_unlock();
1235 return;
1236 }
1237 rcu_read_unlock();
57ec14c5 1238 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1239}
1240
6ee41268 1241static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1242{
1243 struct nfs4_state *state = opendata->state;
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *delegation;
f448badd 1246 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1247 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1248 nfs4_stateid stateid;
1249 int ret = -EAGAIN;
1250
aac00a8d 1251 for (;;) {
dc0b027d 1252 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1253 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1254 if (can_open_cached(state, fmode, open_mode)) {
1255 update_open_stateflags(state, fmode);
6ee41268 1256 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1257 goto out_return_state;
1258 }
1259 spin_unlock(&state->owner->so_lock);
1260 }
34310430
TM		 1261 rcu_read_lock();
1262 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1263 if (!can_open_delegated(delegation, fmode)) {
34310430 1264 rcu_read_unlock();
aac00a8d 1265 break;
34310430 1266 }
aac00a8d 1267 /* Save the delegation */
f597c537 1268 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1269 rcu_read_unlock();
fa332941 1270 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1271 if (!opendata->is_recover) {
1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1273 if (ret != 0)
1274 goto out;
1275 }
aac00a8d 1276 ret = -EAGAIN;
34310430
TM		 1277
1278 /* Try to update the stateid using the delegation */
dc0b027d 1279 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1280 goto out_return_state;
aac00a8d 1281 }
aac00a8d
TM		 1282out:
1283 return ERR_PTR(ret);
1284out_return_state:
1285 atomic_inc(&state->count);
1286 return state;
1287}
1288
e23008ec
AA		 1289static void
1290nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1291{
1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1293 struct nfs_delegation *delegation;
1294 int delegation_flags = 0;
1295
1296 rcu_read_lock();
1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1298 if (delegation)
1299 delegation_flags = delegation->flags;
1300 rcu_read_unlock();
1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1303 "returning a delegation for "
1304 "OPEN(CLAIM_DELEGATE_CUR)\n",
1305 clp->cl_hostname);
1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1307 nfs_inode_set_delegation(state->inode,
1308 data->owner->so_cred,
1309 &data->o_res);
1310 else
1311 nfs_inode_reclaim_delegation(state->inode,
1312 data->owner->so_cred,
1313 &data->o_res);
1314}
1315
1316/*
1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1318 * and update the nfs4_state.
1319 */
1320static struct nfs4_state *
1321_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1322{
1323 struct inode *inode = data->state->inode;
1324 struct nfs4_state *state = data->state;
1325 int ret;
1326
d2bfda2e
WAA		 1327 if (!data->rpc_done) {
1328 if (data->rpc_status) {
1329 ret = data->rpc_status;
1330 goto err;
1331 }
1332 /* cached opens have already been processed */
1333 goto update;
e23008ec
AA		 1334 }
1335
e23008ec
AA		 1336 ret = nfs_refresh_inode(inode, &data->f_attr);
1337 if (ret)
1338 goto err;
1339
1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1342update:
e23008ec
AA		 1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
d49f042a 1345 atomic_inc(&state->count);
e23008ec
AA		 1346
1347 return state;
1348err:
1349 return ERR_PTR(ret);
1350
1351}
1352
1353static struct nfs4_state *
1354_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1355{
1356 struct inode *inode;
1357 struct nfs4_state *state = NULL;
1b370bc2 1358 int ret;
24ac23ab 1359
aac00a8d 1360 if (!data->rpc_done) {
6ee41268 1361 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1362 goto out;
1363 }
1364
1b370bc2 1365 ret = -EAGAIN;
24ac23ab 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1367 goto err;
1775fd3e 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1369 ret = PTR_ERR(inode);
03f28e3a 1370 if (IS_ERR(inode))
1b370bc2
TM		 1371 goto err;
1372 ret = -ENOMEM;
24ac23ab
TM		 1373 state = nfs4_get_open_state(inode, data->owner);
1374 if (state == NULL)
1b370bc2 1375 goto err_put_inode;
e23008ec
AA		 1376 if (data->o_res.delegation_type != 0)
1377 nfs4_opendata_check_deleg(data, state);
34310430 1378 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1379 data->o_arg.fmode);
24ac23ab 1380 iput(inode);
aac00a8d 1381out:
7aa262b5 1382 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1383 return state;
1b370bc2
TM		 1384err_put_inode:
1385 iput(inode);
1386err:
1387 return ERR_PTR(ret);
24ac23ab
TM		 1388}
1389
e23008ec
AA		 1390static struct nfs4_state *
1391nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1394 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1395 return _nfs4_opendata_to_nfs4_state(data);
1396}
1397
864472e9
TM		 1398static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1399{
1400 struct nfs_inode *nfsi = NFS_I(state->inode);
1401 struct nfs_open_context *ctx;
1402
1403 spin_lock(&state->inode->i_lock);
1404 list_for_each_entry(ctx, &nfsi->open_files, list) {
1405 if (ctx->state != state)
1406 continue;
1407 get_nfs_open_context(ctx);
1408 spin_unlock(&state->inode->i_lock);
1409 return ctx;
1410 }
1411 spin_unlock(&state->inode->i_lock);
1412 return ERR_PTR(-ENOENT);
1413}
1414
4a1c0893
TM		 1415static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1416 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1417{
1418 struct nfs4_opendata *opendata;
1419
4a1c0893 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1421 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1422 if (opendata == NULL)
1423 return ERR_PTR(-ENOMEM);
1424 opendata->state = state;
1425 atomic_inc(&state->count);
1426 return opendata;
1427}
1428
dc0b027d 1429static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1430{
2ced46c2 1431 struct nfs4_state *newstate;
864472e9
TM		 1432 int ret;
1433
dc0b027d
TM		 1434 opendata->o_arg.open_flags = 0;
1435 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1438 nfs4_init_opendata_res(opendata);
b257957e 1439 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1440 if (ret != 0)
1441 return ret;
2ced46c2 1442 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1443 if (IS_ERR(newstate))
1444 return PTR_ERR(newstate);
643168c2 1445 nfs4_close_state(newstate, fmode);
2ced46c2 1446 *res = newstate;
864472e9
TM		 1447 return 0;
1448}
1449
1450static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1451{
864472e9 1452 struct nfs4_state *newstate;
864472e9
TM		 1453 int ret;
1454
1455 /* memory barrier prior to reading state->n_* */
2ced46c2 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1457 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1458 smp_rmb();
1459 if (state->n_rdwr != 0) {
b0ed9dbc 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1462 if (ret != 0)
1463 return ret;
2ced46c2
TM		 1464 if (newstate != state)
1465 return -ESTALE;
864472e9
TM		 1466 }
1467 if (state->n_wronly != 0) {
b0ed9dbc 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1470 if (ret != 0)
1471 return ret;
2ced46c2
TM		 1472 if (newstate != state)
1473 return -ESTALE;
864472e9
TM		 1474 }
1475 if (state->n_rdonly != 0) {
b0ed9dbc 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1478 if (ret != 0)
1479 return ret;
2ced46c2
TM		 1480 if (newstate != state)
1481 return -ESTALE;
864472e9 1482 }
1ac7e2fd
TM		 1483 /*
1484 * We may have performed cached opens for all three recoveries.
1485 * Check if we need to update the current stateid.
1486 */
1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1489 write_seqlock(&state->seqlock);
1ac7e2fd 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1492 write_sequnlock(&state->seqlock);
1ac7e2fd 1493 }
864472e9
TM		 1494 return 0;
1495}
1496
1da177e4
LT		 1497/*
1498 * OPEN_RECLAIM:
1499 * reclaim state on the server after a reboot.
1da177e4 1500 */
539cd03a 1501static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1502{
1ac7e2fd 1503 struct nfs_delegation *delegation;
864472e9 1504 struct nfs4_opendata *opendata;
dc0b027d 1505 fmode_t delegation_type = 0;
1da177e4
LT		 1506 int status;
1507
4a1c0893
TM		 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1509 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1510 if (IS_ERR(opendata))
1511 return PTR_ERR(opendata);
1ac7e2fd
TM		 1512 rcu_read_lock();
1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1515 delegation_type = delegation->type;
1ac7e2fd 1516 rcu_read_unlock();
864472e9
TM		 1517 opendata->o_arg.u.delegation_type = delegation_type;
1518 status = nfs4_open_recover(opendata, state);
c6d00e63 1519 nfs4_opendata_put(opendata);
1da177e4
LT		 1520 return status;
1521}
1522
539cd03a 1523static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1524{
1525 struct nfs_server *server = NFS_SERVER(state->inode);
1526 struct nfs4_exception exception = { };
1527 int err;
1528 do {
539cd03a 1529 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1530 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1532 continue;
168667c4 1533 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1534 break;
1535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1536 } while (exception.retry);
1537 return err;
1538}
1539
864472e9
TM		 1540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1541{
1542 struct nfs_open_context *ctx;
1543 int ret;
1544
1545 ctx = nfs4_state_find_open_context(state);
1546 if (IS_ERR(ctx))
91876b13 1547 return -EAGAIN;
539cd03a 1548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1549 put_nfs_open_context(ctx);
1550 return ret;
1551}
1552
db4f2e63 1553static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1554{
be76b5b6
TM		 1555 switch (err) {
1556 default:
1557 printk(KERN_ERR "NFS: %s: unhandled error "
1558 "%d.\n", __func__, err);
1559 case 0:
1560 case -ENOENT:
1561 case -ESTALE:
1562 break;
1563 case -NFS4ERR_BADSESSION:
1564 case -NFS4ERR_BADSLOT:
1565 case -NFS4ERR_BAD_HIGH_SLOT:
1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1567 case -NFS4ERR_DEADSESSION:
1568 set_bit(NFS_DELEGATED_STATE, &state->flags);
1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1570 return -EAGAIN;
1571 case -NFS4ERR_STALE_CLIENTID:
1572 case -NFS4ERR_STALE_STATEID:
1573 set_bit(NFS_DELEGATED_STATE, &state->flags);
1574 case -NFS4ERR_EXPIRED:
1575 /* Don't recall a delegation if it was lost */
1576 nfs4_schedule_lease_recovery(server->nfs_client);
1577 return -EAGAIN;
1578 case -NFS4ERR_DELEG_REVOKED:
1579 case -NFS4ERR_ADMIN_REVOKED:
1580 case -NFS4ERR_BAD_STATEID:
db4f2e63 1581 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1582 nfs_inode_find_state_and_recover(state->inode,
1583 stateid);
1584 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1585 return 0;
1586 case -NFS4ERR_DELAY:
1587 case -NFS4ERR_GRACE:
1588 set_bit(NFS_DELEGATED_STATE, &state->flags);
1589 ssleep(1);
1590 return -EAGAIN;
db4f2e63
TM		 1591 case -ENOMEM:
1592 case -NFS4ERR_DENIED:
1593 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1594 return 0;
be76b5b6 1595 }
1da177e4
LT		 1596 return err;
1597}
1598
db4f2e63
TM		 1599int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1600{
1601 struct nfs_server *server = NFS_SERVER(state->inode);
1602 struct nfs4_opendata *opendata;
1603 int err;
1604
1605 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1606 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1607 if (IS_ERR(opendata))
1608 return PTR_ERR(opendata);
1609 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1610 err = nfs4_open_recover(opendata, state);
1611 nfs4_opendata_put(opendata);
1612 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1613}
1614
be05c860
CL		 1615static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1616{
1617 struct nfs4_opendata *data = calldata;
1618
1619 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1620 &data->o_res.seq_res, task);
1621}
1622
cdd4e68b
TM		 1623static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1624{
1625 struct nfs4_opendata *data = calldata;
1626
be05c860
CL		 1627 nfs40_sequence_done(task, &data->o_res.seq_res);
1628
cdd4e68b 1629 data->rpc_status = task->tk_status;
26e976a8 1630 if (data->rpc_status == 0) {
f597c537 1631 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1632 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1633 renew_lease(data->o_res.server, data->timestamp);
3e309914 1634 data->rpc_done = 1;
26e976a8 1635 }
cdd4e68b
TM		 1636}
1637
1638static void nfs4_open_confirm_release(void *calldata)
1639{
1640 struct nfs4_opendata *data = calldata;
1641 struct nfs4_state *state = NULL;
1642
1643 /* If this request hasn't been cancelled, do nothing */
1644 if (data->cancelled == 0)
1645 goto out_free;
1646 /* In case of error, no cleanup! */
3e309914 1647 if (!data->rpc_done)
cdd4e68b 1648 goto out_free;
cdd4e68b 1649 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1650 if (!IS_ERR(state))
643168c2 1651 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1652out_free:
c6d00e63 1653 nfs4_opendata_put(data);
cdd4e68b
TM		 1654}
1655
1656static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1657 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1658 .rpc_call_done = nfs4_open_confirm_done,
1659 .rpc_release = nfs4_open_confirm_release,
1660};
1661
1662/*
1663 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1664 */
1665static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1666{
1667 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1668 struct rpc_task *task;
5138fde0
TM		 1669 struct rpc_message msg = {
1670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1671 .rpc_argp = &data->c_arg,
1672 .rpc_resp = &data->c_res,
1673 .rpc_cred = data->owner->so_cred,
1674 };
c970aa85
TM		 1675 struct rpc_task_setup task_setup_data = {
1676 .rpc_client = server->client,
5138fde0 1677 .rpc_message = &msg,
c970aa85
TM		 1678 .callback_ops = &nfs4_open_confirm_ops,
1679 .callback_data = data,
101070ca 1680 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1681 .flags = RPC_TASK_ASYNC,
1682 };
1da177e4
LT		 1683 int status;
1684
be05c860 1685 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1686 kref_get(&data->kref);
3e309914
TM		 1687 data->rpc_done = 0;
1688 data->rpc_status = 0;
5138fde0 1689 data->timestamp = jiffies;
c970aa85 1690 task = rpc_run_task(&task_setup_data);
7a1218a2 1691 if (IS_ERR(task))
cdd4e68b 1692 return PTR_ERR(task);
cdd4e68b
TM		 1693 status = nfs4_wait_for_completion_rpc_task(task);
1694 if (status != 0) {
1695 data->cancelled = 1;
1696 smp_wmb();
1697 } else
1698 status = data->rpc_status;
e6b3c4db 1699 rpc_put_task(task);
1da177e4
LT		 1700 return status;
1701}
1702
24ac23ab 1703static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1704{
24ac23ab
TM		 1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state_owner *sp = data->owner;
549b19cc 1707 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1708
24ac23ab 1709 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1710 goto out_wait;
aac00a8d
TM		 1711 /*
1712 * Check if we still need to send an OPEN call, or if we can use
1713 * a delegation instead.
1714 */
1715 if (data->state != NULL) {
1716 struct nfs_delegation *delegation;
1717
dc0b027d 1718 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1719 goto out_no_action;
aac00a8d
TM		 1720 rcu_read_lock();
1721 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1722 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1723 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1724 can_open_delegated(delegation, data->o_arg.fmode))
1725 goto unlock_no_action;
aac00a8d
TM		 1726 rcu_read_unlock();
1727 }
95b72eb0 1728 /* Update client id. */
549b19cc 1729 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1730 switch (data->o_arg.claim) {
1731 case NFS4_OPEN_CLAIM_PREVIOUS:
1732 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1733 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1734 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1735 case NFS4_OPEN_CLAIM_FH:
1736 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1737 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1738 }
26e976a8 1739 data->timestamp = jiffies;
035168ab 1740 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1741 &data->o_arg.seq_args,
2240a9e2
TM		 1742 &data->o_res.seq_res,
1743 task) != 0)
1744 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1745
1746 /* Set the create mode (note dependency on the session type) */
1747 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1748 if (data->o_arg.open_flags & O_EXCL) {
1749 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1750 if (nfs4_has_persistent_session(clp))
1751 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1752 else if (clp->cl_mvops->minor_version > 0)
1753 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1754 }
6ee41268 1755 return;
652f89f6
TM		 1756unlock_no_action:
1757 rcu_read_unlock();
6ee41268
TM		 1758out_no_action:
1759 task->tk_action = NULL;
c8da19b9 1760out_wait:
b75ad4cd 1761 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1762}
1763
24ac23ab
TM		 1764static void nfs4_open_done(struct rpc_task *task, void *calldata)
1765{
1766 struct nfs4_opendata *data = calldata;
1da177e4 1767
24ac23ab 1768 data->rpc_status = task->tk_status;
d898528c 1769
14516c3a
TM		 1770 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1771 return;
d898528c 1772
24ac23ab 1773 if (task->tk_status == 0) {
807d66d8
TM		 1774 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1775 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1776 case S_IFREG:
1777 break;
1778 case S_IFLNK:
24ac23ab 1779 data->rpc_status = -ELOOP;
6f926b5b
TM		 1780 break;
1781 case S_IFDIR:
24ac23ab 1782 data->rpc_status = -EISDIR;
6f926b5b
TM		 1783 break;
1784 default:
24ac23ab 1785 data->rpc_status = -ENOTDIR;
807d66d8 1786 }
6f926b5b 1787 }
26e976a8 1788 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1789 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1790 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1791 }
3e309914 1792 data->rpc_done = 1;
24ac23ab 1793}
6f926b5b 1794
24ac23ab
TM		 1795static void nfs4_open_release(void *calldata)
1796{
1797 struct nfs4_opendata *data = calldata;
1798 struct nfs4_state *state = NULL;
1799
1800 /* If this request hasn't been cancelled, do nothing */
1801 if (data->cancelled == 0)
1802 goto out_free;
1803 /* In case of error, no cleanup! */
3e309914 1804 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1805 goto out_free;
1806 /* In case we need an open_confirm, no cleanup! */
1807 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1808 goto out_free;
24ac23ab 1809 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1810 if (!IS_ERR(state))
643168c2 1811 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1812out_free:
c6d00e63 1813 nfs4_opendata_put(data);
24ac23ab
TM		 1814}
1815
1816static const struct rpc_call_ops nfs4_open_ops = {
1817 .rpc_call_prepare = nfs4_open_prepare,
1818 .rpc_call_done = nfs4_open_done,
1819 .rpc_release = nfs4_open_release,
1820};
1821
b257957e 1822static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1823{
1824 struct inode *dir = data->dir->d_inode;
1825 struct nfs_server *server = NFS_SERVER(dir);
1826 struct nfs_openargs *o_arg = &data->o_arg;
1827 struct nfs_openres *o_res = &data->o_res;
1828 struct rpc_task *task;
5138fde0
TM		 1829 struct rpc_message msg = {
1830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1831 .rpc_argp = o_arg,
1832 .rpc_resp = o_res,
1833 .rpc_cred = data->owner->so_cred,
1834 };
c970aa85
TM		 1835 struct rpc_task_setup task_setup_data = {
1836 .rpc_client = server->client,
5138fde0 1837 .rpc_message = &msg,
c970aa85
TM		 1838 .callback_ops = &nfs4_open_ops,
1839 .callback_data = data,
101070ca 1840 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1841 .flags = RPC_TASK_ASYNC,
1842 };
24ac23ab
TM		 1843 int status;
1844
a9c92d6b 1845 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1846 kref_get(&data->kref);
3e309914
TM		 1847 data->rpc_done = 0;
1848 data->rpc_status = 0;
2ced46c2 1849 data->cancelled = 0;
bdeca1b7
TM		 1850 data->is_recover = 0;
1851 if (isrecover) {
8fe72bac 1852 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1853 data->is_recover = 1;
1854 }
c970aa85 1855 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1856 if (IS_ERR(task))
1857 return PTR_ERR(task);
1858 status = nfs4_wait_for_completion_rpc_task(task);
1859 if (status != 0) {
1860 data->cancelled = 1;
1861 smp_wmb();
1862 } else
1863 status = data->rpc_status;
1864 rpc_put_task(task);
1865
1866 return status;
1867}
1868
1869static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1870{
1871 struct inode *dir = data->dir->d_inode;
1872 struct nfs_openres *o_res = &data->o_res;
1873 int status;
1874
1875 status = nfs4_run_open_task(data, 1);
1876 if (status != 0 || !data->rpc_done)
1877 return status;
1878
6926afd1
TM		 1879 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1880
b257957e
AB		 1881 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1882 status = _nfs4_proc_open_confirm(data);
1883 if (status != 0)
1884 return status;
1885 }
1886
1887 return status;
1888}
1889
6168f62c
WAA		 1890static int nfs4_opendata_access(struct rpc_cred *cred,
1891 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1892 struct nfs4_state *state, fmode_t fmode,
1893 int openflags)
6168f62c
WAA		 1894{
1895 struct nfs_access_entry cache;
1896 u32 mask;
1897
1898 /* access call failed or for some reason the server doesn't
1899 * support any access modes -- defer access call until later */
1900 if (opendata->o_res.access_supported == 0)
1901 return 0;
1902
1903 mask = 0;
bbd3a8ee 1904 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1905 * write mode bits, but POSIX allows the creating process to write.
1906 * use openflags to check for exec, because fmode won't
1907 * always have FMODE_EXEC set when file open for exec. */
1908 if (openflags & __FMODE_EXEC) {
1909 /* ONLY check for exec rights */
1910 mask = MAY_EXEC;
1911 } else if (fmode & FMODE_READ)
1912 mask = MAY_READ;
6168f62c
WAA		 1913
1914 cache.cred = cred;
1915 cache.jiffies = jiffies;
1916 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1917 nfs_access_add_cache(state->inode, &cache);
1918
bbd3a8ee 1919 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1920 return 0;
1921
1922 /* even though OPEN succeeded, access is denied. Close the file */
1923 nfs4_close_state(state, fmode);
998f40b5 1924 return -EACCES;
6168f62c
WAA		 1925}
1926
b257957e
AB		 1927/*
1928 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1929 */
1930static int _nfs4_proc_open(struct nfs4_opendata *data)
1931{
1932 struct inode *dir = data->dir->d_inode;
1933 struct nfs_server *server = NFS_SERVER(dir);
1934 struct nfs_openargs *o_arg = &data->o_arg;
1935 struct nfs_openres *o_res = &data->o_res;
1936 int status;
1937
1938 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1939 if (!data->rpc_done)
1940 return status;
1941 if (status != 0) {
1942 if (status == -NFS4ERR_BADNAME &&
1943 !(o_arg->open_flags & O_CREAT))
1944 return -ENOENT;
24ac23ab 1945 return status;
08ef7bd3 1946 }
24ac23ab 1947
6926afd1
TM		 1948 nfs_fattr_map_and_free_names(server, &data->f_attr);
1949
5bc2afc2 1950 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1951 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1952 if (o_arg->open_flags & O_EXCL)
1953 data->file_created = 1;
1954 else if (o_res->cinfo.before != o_res->cinfo.after)
1955 data->file_created = 1;
1956 }
0df5dd4a
TM		 1957 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1958 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1959 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1960 status = _nfs4_proc_open_confirm(data);
1da177e4 1961 if (status != 0)
24ac23ab 1962 return status;
1da177e4
LT		 1963 }
1964 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1965 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1966 return 0;
1da177e4
LT		 1967}
1968
d83217c1
AA		 1969static int nfs4_recover_expired_lease(struct nfs_server *server)
1970{
1971 return nfs4_client_recover_expired_lease(server->nfs_client);
1972}
1973
1da177e4
LT		 1974/*
1975 * OPEN_EXPIRED:
1976 * reclaim state on the server after a network partition.
1977 * Assumes caller holds the appropriate lock
1978 */
539cd03a 1979static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1980{
e56e0b78 1981 struct nfs4_opendata *opendata;
864472e9 1982 int ret;
1da177e4 1983
4a1c0893 1984 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1985 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1986 if (IS_ERR(opendata))
1987 return PTR_ERR(opendata);
864472e9 1988 ret = nfs4_open_recover(opendata, state);
35d05778 1989 if (ret == -ESTALE)
3d4ff43d 1990 d_drop(ctx->dentry);
c6d00e63 1991 nfs4_opendata_put(opendata);
864472e9 1992 return ret;
1da177e4
LT		 1993}
1994
a9ed2e25 1995static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1996{
539cd03a 1997 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1998 struct nfs4_exception exception = { };
1999 int err;
2000
2001 do {
539cd03a 2002 err = _nfs4_open_expired(ctx, state);
42113a75 2003 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2004 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2005 continue;
a9ed2e25
TM		 2006 switch (err) {
2007 default:
2008 goto out;
2009 case -NFS4ERR_GRACE:
2010 case -NFS4ERR_DELAY:
2011 nfs4_handle_exception(server, err, &exception);
2012 err = 0;
2013 }
202b50dc 2014 } while (exception.retry);
a9ed2e25 2015out:
202b50dc
TM		 2016 return err;
2017}
2018
1da177e4
LT		 2019static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2020{
1da177e4 2021 struct nfs_open_context *ctx;
864472e9 2022 int ret;
1da177e4 2023
864472e9
TM		 2024 ctx = nfs4_state_find_open_context(state);
2025 if (IS_ERR(ctx))
91876b13 2026 return -EAGAIN;
539cd03a 2027 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2028 put_nfs_open_context(ctx);
2029 return ret;
1da177e4
LT		 2030}
2031
f062eb6c 2032#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2033static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2034{
f062eb6c 2035 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2036 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2037 struct nfs_delegation *delegation;
2038 struct rpc_cred *cred = NULL;
2039 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2040
2041 /* If a state reset has been done, test_stateid is unneeded */
2042 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2043 return;
2044
ab7cb0df
TM		 2045 /* Get the delegation credential for use by test/free_stateid */
2046 rcu_read_lock();
2047 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2048 if (delegation != NULL &&
2049 nfs4_stateid_match(&delegation->stateid, stateid)) {
2050 cred = get_rpccred(delegation->cred);
2051 rcu_read_unlock();
2052 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2053 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2054 } else
2055 rcu_read_unlock();
2056
3e60ffdd
CL		 2057 if (status != NFS_OK) {
2058 /* Free the stateid unless the server explicitly
2059 * informs us the stateid is unrecognized. */
2060 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2061 nfs41_free_stateid(server, stateid, cred);
6938867e 2062 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2063
6938867e
BS		 2064 write_seqlock(&state->seqlock);
2065 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2066 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2067 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2068 }
ab7cb0df
TM		 2069
2070 if (cred != NULL)
2071 put_rpccred(cred);
3e60ffdd
CL		 2072}
2073
2074/**
2075 * nfs41_check_open_stateid - possibly free an open stateid
2076 *
2077 * @state: NFSv4 state for an inode
2078 *
2079 * Returns NFS_OK if recovery for this stateid is now finished.
2080 * Otherwise a negative NFS4ERR value is returned.
2081 */
2082static int nfs41_check_open_stateid(struct nfs4_state *state)
2083{
2084 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2085 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2086 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2087 int status;
2088
2089 /* If a state reset has been done, test_stateid is unneeded */
2090 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2091 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2092 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2093 return -NFS4ERR_BAD_STATEID;
2094
ab7cb0df 2095 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2096 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2097 if (status != NFS_OK) {
2098 /* Free the stateid unless the server explicitly
2099 * informs us the stateid is unrecognized. */
2100 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2101 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2102
2103 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2104 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2105 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2106 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2107 }
2108 return status;
2109}
2110
2111static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2112{
eb64cf96 2113 int status;
b01dd1d8 2114
3e60ffdd
CL		 2115 nfs41_clear_delegation_stateid(state);
2116 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2117 if (status != NFS_OK)
2118 status = nfs4_open_expired(sp, state);
2119 return status;
f062eb6c
BS		 2120}
2121#endif
2122
aa53ed54
JL		 2123/*
2124 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2125 * fields corresponding to attributes that were used to store the verifier.
2126 * Make sure we clobber those fields in the later setattr call
2127 */
2128static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2129{
2130 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2131 !(sattr->ia_valid & ATTR_ATIME_SET))
2132 sattr->ia_valid |= ATTR_ATIME;
2133
2134 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2135 !(sattr->ia_valid & ATTR_MTIME_SET))
2136 sattr->ia_valid |= ATTR_MTIME;
2137}
2138
c21443c2
TM		 2139static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2140 fmode_t fmode,
2141 int flags,
3efb9722 2142 struct nfs_open_context *ctx)
c21443c2
TM		 2143{
2144 struct nfs4_state_owner *sp = opendata->owner;
2145 struct nfs_server *server = sp->so_server;
275bb307 2146 struct dentry *dentry;
c21443c2
TM		 2147 struct nfs4_state *state;
2148 unsigned int seq;
2149 int ret;
2150
2151 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2152
2153 ret = _nfs4_proc_open(opendata);
2154 if (ret != 0)
2155 goto out;
2156
2157 state = nfs4_opendata_to_nfs4_state(opendata);
2158 ret = PTR_ERR(state);
2159 if (IS_ERR(state))
2160 goto out;
2161 if (server->caps & NFS_CAP_POSIX_LOCK)
2162 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2163
275bb307
TM		 2164 dentry = opendata->dentry;
2165 if (dentry->d_inode == NULL) {
2166 /* FIXME: Is this d_drop() ever needed? */
2167 d_drop(dentry);
2168 dentry = d_add_unique(dentry, igrab(state->inode));
2169 if (dentry == NULL) {
2170 dentry = opendata->dentry;
2171 } else if (dentry != ctx->dentry) {
2172 dput(ctx->dentry);
2173 ctx->dentry = dget(dentry);
2174 }
2175 nfs_set_verifier(dentry,
2176 nfs_save_change_attribute(opendata->dir->d_inode));
2177 }
2178
c21443c2
TM		 2179 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2180 if (ret != 0)
2181 goto out;
2182
3efb9722 2183 ctx->state = state;
c45ffdd2
TM		 2184 if (dentry->d_inode == state->inode) {
2185 nfs_inode_attach_open_context(ctx);
2186 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2187 nfs4_schedule_stateid_recovery(server, state);
2188 }
c21443c2
TM		 2189out:
2190 return ret;
2191}
2192
1da177e4 2193/*
24ac23ab 2194 * Returns a referenced nfs4_state
1da177e4 2195 */
82be417a 2196static int _nfs4_do_open(struct inode *dir,
4197a055 2197 struct nfs_open_context *ctx,
82be417a
AA		 2198 int flags,
2199 struct iattr *sattr,
5bc2afc2
TM		 2200 struct nfs4_label *label,
2201 int *opened)
1da177e4
LT		 2202{
2203 struct nfs4_state_owner *sp;
2204 struct nfs4_state *state = NULL;
2205 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2206 struct nfs4_opendata *opendata;
4197a055
TM		 2207 struct dentry *dentry = ctx->dentry;
2208 struct rpc_cred *cred = ctx->cred;
2209 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2210 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2211 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2212 struct nfs4_label *olabel = NULL;
aac00a8d 2213 int status;
1da177e4
LT		 2214
2215 /* Protect against reboot recovery conflicts */
1da177e4 2216 status = -ENOMEM;
d1e284d5
TM		 2217 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2218 if (sp == NULL) {
1da177e4
LT		 2219 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2220 goto out_err;
2221 }
58d9714a
TM		 2222 status = nfs4_recover_expired_lease(server);
2223 if (status != 0)
b4454fe1 2224 goto err_put_state_owner;
82a2c1b7
AV		 2225 if (dentry->d_inode != NULL)
2226 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2227 status = -ENOMEM;
49f9a0fa
TM		 2228 if (dentry->d_inode)
2229 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2230 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2231 label, claim, GFP_KERNEL);
e56e0b78 2232 if (opendata == NULL)
95d35cb4 2233 goto err_put_state_owner;
1da177e4 2234
14c43f76
DQ		 2235 if (label) {
2236 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2237 if (IS_ERR(olabel)) {
2238 status = PTR_ERR(olabel);
2239 goto err_opendata_put;
2240 }
2241 }
2242
82be417a
AA		 2243 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2244 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2245 if (!opendata->f_attr.mdsthreshold)
14c43f76 2246 goto err_free_label;
1549210f 2247 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2248 }
82a2c1b7
AV		 2249 if (dentry->d_inode != NULL)
2250 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2251
3efb9722 2252 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2253 if (status != 0)
14c43f76 2254 goto err_free_label;
3efb9722 2255 state = ctx->state;
6168f62c 2256
549b19cc
TM		 2257 if ((opendata->o_arg.open_flags & O_EXCL) &&
2258 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2259 nfs4_exclusive_attrset(opendata, sattr);
2260
2261 nfs_fattr_init(opendata->o_res.f_attr);
2262 status = nfs4_do_setattr(state->inode, cred,
2263 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2264 state, label, olabel);
2265 if (status == 0) {
0ab64e0e 2266 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2267 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2268 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2269 }
0ab64e0e 2270 }
5bc2afc2
TM		 2271 if (opendata->file_created)
2272 *opened |= FILE_CREATED;
82be417a
AA		 2273
2274 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2275 *ctx_th = opendata->f_attr.mdsthreshold;
2276 else
2277 kfree(opendata->f_attr.mdsthreshold);
2278 opendata->f_attr.mdsthreshold = NULL;
2279
14c43f76
DQ		 2280 nfs4_label_free(olabel);
2281
c6d00e63 2282 nfs4_opendata_put(opendata);
1da177e4 2283 nfs4_put_state_owner(sp);
1da177e4 2284 return 0;
14c43f76
DQ		 2285err_free_label:
2286 nfs4_label_free(olabel);
c6d00e63 2287err_opendata_put:
82be417a 2288 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2289 nfs4_opendata_put(opendata);
e56e0b78
TM		 2290err_put_state_owner:
2291 nfs4_put_state_owner(sp);
1da177e4 2292out_err:
1da177e4
LT		 2293 return status;
2294}
2295
2296
82be417a 2297static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2298 struct nfs_open_context *ctx,
82be417a
AA		 2299 int flags,
2300 struct iattr *sattr,
5bc2afc2
TM		 2301 struct nfs4_label *label,
2302 int *opened)
1da177e4 2303{
49f9a0fa 2304 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2305 struct nfs4_exception exception = { };
2306 struct nfs4_state *res;
2307 int status;
2308
2309 do {
5bc2afc2 2310 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2311 res = ctx->state;
42113a75 2312 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2313 if (status == 0)
2314 break;
2315 /* NOTE: BAD_SEQID means the server and client disagree about the
2316 * book-keeping w.r.t. state-changing operations
2317 * (OPEN/CLOSE/LOCK/LOCKU...)
2318 * It is actually a sign of a bug on the client or on the server.
2319 *
2320 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2321 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2322 * have unhashed the old state_owner for us, and that we can
2323 * therefore safely retry using a new one. We should still warn
2324 * the user though...
2325 */
2326 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2327 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2328 " returned a bad sequence-id error!\n",
2329 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2330 exception.retry = 1;
2331 continue;
2332 }
550f5747
TM		 2333 /*
2334 * BAD_STATEID on OPEN means that the server cancelled our
2335 * state before it received the OPEN_CONFIRM.
2336 * Recover by retrying the request as per the discussion
2337 * on Page 181 of RFC3530.
2338 */
2339 if (status == -NFS4ERR_BAD_STATEID) {
2340 exception.retry = 1;
2341 continue;
2342 }
aac00a8d
TM		 2343 if (status == -EAGAIN) {
2344 /* We must have found a delegation */
2345 exception.retry = 1;
2346 continue;
2347 }
49f9a0fa
TM		 2348 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2349 continue;
2350 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2351 status, &exception));
2352 } while (exception.retry);
2353 return res;
2354}
2355
659bfcd6
TM		 2356static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2357 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2358 struct nfs4_state *state, struct nfs4_label *ilabel,
2359 struct nfs4_label *olabel)
1da177e4 2360{
3e4f6290 2361 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2362 struct nfs_setattrargs arg = {
3e4f6290 2363 .fh = NFS_FH(inode),
1da177e4
LT		 2364 .iap = sattr,
2365 .server = server,
2366 .bitmask = server->attr_bitmask,
1775fd3e 2367 .label = ilabel,
1da177e4
LT		 2368 };
2369 struct nfs_setattrres res = {
2370 .fattr = fattr,
1775fd3e 2371 .label = olabel,
1da177e4
LT		 2372 .server = server,
2373 };
2374 struct rpc_message msg = {
659bfcd6
TM		 2375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2376 .rpc_argp = &arg,
2377 .rpc_resp = &res,
2378 .rpc_cred = cred,
1da177e4 2379 };
26e976a8 2380 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2381 fmode_t fmode;
2382 bool truncate;
65e4308d 2383 int status;
1da177e4 2384
aa9c2669
DQ		 2385 arg.bitmask = nfs4_bitmask(server, ilabel);
2386 if (ilabel)
2387 arg.bitmask = nfs4_bitmask(server, olabel);
2388
0e574af1 2389 nfs_fattr_init(fattr);
1da177e4 2390
ee3ae84e
TM		 2391 /* Servers should only apply open mode checks for file size changes */
2392 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2393 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2394
2395 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2396 /* Use that stateid */
2397 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2398 struct nfs_lockowner lockowner = {
2399 .l_owner = current->files,
2400 .l_pid = current->tgid,
2401 };
4fc8796d 2402 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2403 &lockowner);
08e9eac4 2404 } else
f597c537 2405 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2406
7c513058 2407 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2408 if (status == 0 && state != NULL)
2409 renew_lease(server, timestamp);
65e4308d 2410 return status;
1da177e4
LT		 2411}
2412
659bfcd6
TM		 2413static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2414 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2415 struct nfs4_state *state, struct nfs4_label *ilabel,
2416 struct nfs4_label *olabel)
1da177e4 2417{
3e4f6290 2418 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2419 struct nfs4_exception exception = {
2420 .state = state,
3114ea7a 2421 .inode = inode,
a1d0b5ee 2422 };
1da177e4
LT		 2423 int err;
2424 do {
1775fd3e 2425 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2426 trace_nfs4_setattr(inode, err);
451146be
TM		 2427 switch (err) {
2428 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2429 if (!(sattr->ia_valid & ATTR_SIZE)) {
2430 pr_warn_once("NFSv4: server %s is incorrectly "
2431 "applying open mode checks to "
2432 "a SETATTR that is not "
2433 "changing file size.\n",
2434 server->nfs_client->cl_hostname);
2435 }
451146be
TM		 2436 if (state && !(state->state & FMODE_WRITE)) {
2437 err = -EBADF;
2438 if (sattr->ia_valid & ATTR_OPEN)
2439 err = -EACCES;
2440 goto out;
2441 }
2442 }
2443 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2444 } while (exception.retry);
451146be 2445out:
1da177e4
LT		 2446 return err;
2447}
2448
2449struct nfs4_closedata {
2450 struct inode *inode;
2451 struct nfs4_state *state;
2452 struct nfs_closeargs arg;
2453 struct nfs_closeres res;
516a6af6 2454 struct nfs_fattr fattr;
26e976a8 2455 unsigned long timestamp;
f7e8917a
FI		 2456 bool roc;
2457 u32 roc_barrier;
1da177e4
LT		 2458};
2459
963d8fe5 2460static void nfs4_free_closedata(void *data)
9512135d 2461{
963d8fe5
TM		 2462 struct nfs4_closedata *calldata = data;
2463 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2464 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2465
f7e8917a
FI		 2466 if (calldata->roc)
2467 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2468 nfs4_put_open_state(calldata->state);
2469 nfs_free_seqid(calldata->arg.seqid);
9512135d 2470 nfs4_put_state_owner(sp);
322b2b90 2471 nfs_sb_deactive(sb);
9512135d
TM		 2472 kfree(calldata);
2473}
2474
88069f77
TM		 2475static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2476 fmode_t fmode)
2477{
2478 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2479 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2480 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2481 case FMODE_WRITE:
88069f77 2482 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2483 break;
2484 case FMODE_READ:
88069f77 2485 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2486 break;
2487 case 0:
2488 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2489 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2490 clear_bit(NFS_OPEN_STATE, &state->flags);
2491 }
88069f77
TM		 2492 spin_unlock(&state->owner->so_lock);
2493}
2494
963d8fe5 2495static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2496{
963d8fe5 2497 struct nfs4_closedata *calldata = data;
1da177e4 2498 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2499 struct nfs_server *server = NFS_SERVER(calldata->inode);
2500
a3ca5651 2501 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2502 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2503 return;
42113a75 2504 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2505 /* hmm. we are done with the inode, and in the process of freeing
2506 * the state_owner. we keep this around to process errors
2507 */
1da177e4
LT		 2508 switch (task->tk_status) {
2509 case 0:
f7e8917a
FI		 2510 if (calldata->roc)
2511 pnfs_roc_set_barrier(state->inode,
2512 calldata->roc_barrier);
45328c35 2513 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2514 renew_lease(server, calldata->timestamp);
88069f77
TM		 2515 nfs4_close_clear_stateid_flags(state,
2516 calldata->arg.fmode);
1da177e4
LT		 2517 break;
2518 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2519 case -NFS4ERR_OLD_STATEID:
2520 case -NFS4ERR_BAD_STATEID:
1da177e4 2521 case -NFS4ERR_EXPIRED:
dc0b027d 2522 if (calldata->arg.fmode == 0)
9e33bed5 2523 break;
1da177e4 2524 default:
72211dbe
TM		 2525 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2526 rpc_restart_call_prepare(task);
1da177e4 2527 }
72211dbe 2528 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2529 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2530 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2531}
2532
4ce70ada 2533static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2534{
4ce70ada 2535 struct nfs4_closedata *calldata = data;
9512135d 2536 struct nfs4_state *state = calldata->state;
7fdab069 2537 struct inode *inode = calldata->inode;
88069f77 2538 int call_close = 0;
9512135d 2539
a3ca5651 2540 dprintk("%s: begin!\n", __func__);
963d8fe5 2541 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2542 goto out_wait;
003707c7 2543
88069f77
TM		 2544 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2545 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2546 spin_lock(&state->owner->so_lock);
003707c7 2547 /* Calculate the change in open mode */
e7616923 2548 if (state->n_rdwr == 0) {
003707c7 2549 if (state->n_rdonly == 0) {
88069f77
TM		 2550 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2551 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2552 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2553 }
2554 if (state->n_wronly == 0) {
88069f77
TM		 2555 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2556 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2557 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2558 }
e7616923 2559 }
5d422301
TM		 2560 if (!nfs4_valid_open_stateid(state))
2561 call_close = 0;
4cecb76f 2562 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2563
2564 if (!call_close) {
963d8fe5 2565 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2566 goto out_no_action;
9512135d 2567 }
88069f77 2568
f7e8917a 2569 if (calldata->arg.fmode == 0) {
88069f77 2570 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2571 if (calldata->roc &&
b9536ad5
AA		 2572 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2573 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2574 goto out_wait;
b9536ad5 2575 }
f7e8917a 2576 }
88069f77 2577
516a6af6 2578 nfs_fattr_init(calldata->res.fattr);
26e976a8 2579 calldata->timestamp = jiffies;
7fdab069 2580 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2581 &calldata->arg.seq_args,
2582 &calldata->res.seq_res,
2240a9e2
TM		 2583 task) != 0)
2584 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2585 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2586 return;
2587out_no_action:
2588 task->tk_action = NULL;
2589out_wait:
2590 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2591}
2592
963d8fe5 2593static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2594 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2595 .rpc_call_done = nfs4_close_done,
2596 .rpc_release = nfs4_free_closedata,
2597};
2598
1da177e4
LT		 2599/*
2600 * It is possible for data to be read/written from a mem-mapped file
2601 * after the sys_close call (which hits the vfs layer as a flush).
2602 * This means that we can't safely call nfsv4 close on a file until
2603 * the inode is cleared. This in turn means that we are not good
2604 * NFSv4 citizens - we do not indicate to the server to update the file's
2605 * share state even when we are done with one of the three share
2606 * stateid's in the inode.
2607 *
2608 * NOTE: Caller must be holding the sp->so_owner semaphore!
2609 */
1f7977c1 2610int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2611{
4a35bd41 2612 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2613 struct nfs4_closedata *calldata;
b39e625b
TM		 2614 struct nfs4_state_owner *sp = state->owner;
2615 struct rpc_task *task;
5138fde0
TM		 2616 struct rpc_message msg = {
2617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2618 .rpc_cred = state->owner->so_cred,
2619 };
c970aa85
TM		 2620 struct rpc_task_setup task_setup_data = {
2621 .rpc_client = server->client,
5138fde0 2622 .rpc_message = &msg,
c970aa85 2623 .callback_ops = &nfs4_close_ops,
101070ca 2624 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2625 .flags = RPC_TASK_ASYNC,
2626 };
9512135d 2627 int status = -ENOMEM;
1da177e4 2628
fa940720
WAA		 2629 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2630 &task_setup_data.rpc_client, &msg);
2631
8535b2be 2632 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2633 if (calldata == NULL)
9512135d 2634 goto out;
a9c92d6b 2635 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2636 calldata->inode = state->inode;
1da177e4 2637 calldata->state = state;
4a35bd41 2638 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2639 calldata->arg.stateid = &state->open_stateid;
1da177e4 2640 /* Serialization for the sequence id */
8535b2be 2641 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2642 if (calldata->arg.seqid == NULL)
2643 goto out_free_calldata;
dc0b027d 2644 calldata->arg.fmode = 0;
a65318bf 2645 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2646 calldata->res.fattr = &calldata->fattr;
c1d51931 2647 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2648 calldata->res.server = server;
1f7977c1 2649 calldata->roc = pnfs_roc(state->inode);
643168c2 2650 nfs_sb_active(calldata->inode->i_sb);
9512135d 2651
1174dd1f
TM		 2652 msg.rpc_argp = &calldata->arg;
2653 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2654 task_setup_data.callback_data = calldata;
2655 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2656 if (IS_ERR(task))
2657 return PTR_ERR(task);
a49c3c77
TM		 2658 status = 0;
2659 if (wait)
2660 status = rpc_wait_for_completion_task(task);
b39e625b 2661 rpc_put_task(task);
a49c3c77 2662 return status;
9512135d
TM		 2663out_free_calldata:
2664 kfree(calldata);
2665out:
b39e625b
TM		 2666 nfs4_put_open_state(state);
2667 nfs4_put_state_owner(sp);
9512135d 2668 return status;
1da177e4
LT		 2669}
2670
2b484297 2671static struct inode *
5bc2afc2
TM		 2672nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2673 int open_flags, struct iattr *attr, int *opened)
1da177e4 2674{
1da177e4 2675 struct nfs4_state *state;
aa9c2669
DQ		 2676 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2677
2678 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2679
565277f6 2680 /* Protect against concurrent sillydeletes */
5bc2afc2 2681 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2682
2683 nfs4_label_release_security(label);
2684
f46e0bd3
TM		 2685 if (IS_ERR(state))
2686 return ERR_CAST(state);
275bb307 2687 return state->inode;
1da177e4
LT		 2688}
2689
1185a552 2690static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2691{
2692 if (ctx->state == NULL)
2693 return;
2694 if (is_sync)
643168c2 2695 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2696 else
643168c2 2697 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2698}
1da177e4
LT		 2699
2700static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2701{
43652ad5
BH		 2702 struct nfs4_server_caps_arg args = {
2703 .fhandle = fhandle,
2704 };
1da177e4
LT		 2705 struct nfs4_server_caps_res res = {};
2706 struct rpc_message msg = {
2707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2708 .rpc_argp = &args,
1da177e4
LT		 2709 .rpc_resp = &res,
2710 };
2711 int status;
2712
7c513058 2713 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2714 if (status == 0) {
2715 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2716 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2717 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2718 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2719 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2720 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2721 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2722 server->caps |= NFS_CAP_ACLS;
2723 if (res.has_links != 0)
2724 server->caps |= NFS_CAP_HARDLINKS;
2725 if (res.has_symlinks != 0)
2726 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2727 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2728 server->caps |= NFS_CAP_FILEID;
2729 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2730 server->caps |= NFS_CAP_MODE;
2731 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2732 server->caps |= NFS_CAP_NLINK;
2733 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2734 server->caps |= NFS_CAP_OWNER;
2735 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2736 server->caps |= NFS_CAP_OWNER_GROUP;
2737 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2738 server->caps |= NFS_CAP_ATIME;
2739 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2740 server->caps |= NFS_CAP_CTIME;
2741 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2742 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2743#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2744 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2745 server->caps |= NFS_CAP_SECURITY_LABEL;
2746#endif
2747 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2748 sizeof(server->attr_bitmask));
62ab460c 2749
aa9c2669
DQ		 2750 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2751 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2752 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2753 }
a65318bf
TM		 2754 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2755 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2756 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2757 server->acl_bitmask = res.acl_bitmask;
264e6351 2758 server->fh_expire_type = res.fh_expire_type;
1da177e4 2759 }
cccef3b9 2760
1da177e4
LT		 2761 return status;
2762}
2763
55a97593 2764int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2765{
2766 struct nfs4_exception exception = { };
2767 int err;
2768 do {
2769 err = nfs4_handle_exception(server,
2770 _nfs4_server_capabilities(server, fhandle),
2771 &exception);
2772 } while (exception.retry);
2773 return err;
2774}
2775
2776static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2777 struct nfs_fsinfo *info)
2778{
aa9c2669 2779 u32 bitmask[3];
1da177e4 2780 struct nfs4_lookup_root_arg args = {
aa9c2669 2781 .bitmask = bitmask,
1da177e4
LT		 2782 };
2783 struct nfs4_lookup_res res = {
2784 .server = server,
0e574af1 2785 .fattr = info->fattr,
1da177e4
LT		 2786 .fh = fhandle,
2787 };
2788 struct rpc_message msg = {
2789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2790 .rpc_argp = &args,
2791 .rpc_resp = &res,
2792 };
008f55d0 2793
aa9c2669
DQ		 2794 bitmask[0] = nfs4_fattr_bitmap[0];
2795 bitmask[1] = nfs4_fattr_bitmap[1];
2796 /*
2797 * Process the label in the upcoming getfattr
2798 */
2799 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2800
0e574af1 2801 nfs_fattr_init(info->fattr);
7c513058 2802 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2803}
2804
2805static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2806 struct nfs_fsinfo *info)
2807{
2808 struct nfs4_exception exception = { };
2809 int err;
2810 do {
fb8a5ba8 2811 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2812 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2813 switch (err) {
2814 case 0:
2815 case -NFS4ERR_WRONGSEC:
05e9cfb4 2816 goto out;
fb8a5ba8
BS		 2817 default:
2818 err = nfs4_handle_exception(server, err, &exception);
2819 }
1da177e4 2820 } while (exception.retry);
05e9cfb4 2821out:
1da177e4
LT		 2822 return err;
2823}
2824
8f70e95f
BS		 2825static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2826 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2827{
c2190661
TM		 2828 struct rpc_auth_create_args auth_args = {
2829 .pseudoflavor = flavor,
2830 };
8f70e95f
BS		 2831 struct rpc_auth *auth;
2832 int ret;
2833
c2190661 2834 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2835 if (IS_ERR(auth)) {
75bc8821 2836 ret = -EACCES;
8f70e95f
BS		 2837 goto out;
2838 }
2839 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2840out:
2841 return ret;
2842}
2843
9a744ba3
CL		 2844/*
2845 * Retry pseudoroot lookup with various security flavors. We do this when:
2846 *
2847 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2848 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2849 *
2850 * Returns zero on success, or a negative NFS4ERR value, or a
2851 * negative errno value.
2852 */
801a16dc 2853static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2854 struct nfs_fsinfo *info)
1da177e4 2855{
9a744ba3
CL		 2856 /* Per 3530bis 15.33.5 */
2857 static const rpc_authflavor_t flav_array[] = {
2858 RPC_AUTH_GSS_KRB5P,
2859 RPC_AUTH_GSS_KRB5I,
2860 RPC_AUTH_GSS_KRB5,
c4eafe11 2861 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2862 RPC_AUTH_NULL,
2863 };
2864 int status = -EPERM;
2865 size_t i;
6a1a1e34 2866
9a744ba3 2867 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2868 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2869 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2870 continue;
2871 break;
8f70e95f 2872 }
9a744ba3 2873
fb8a5ba8
BS		 2874 /*
2875 * -EACCESS could mean that the user doesn't have correct permissions
2876 * to access the mount. It could also mean that we tried to mount
2877 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2878 * existing mount programs don't handle -EACCES very well so it should
2879 * be mapped to -EPERM instead.
2880 */
2881 if (status == -EACCES)
2882 status = -EPERM;
801a16dc
BS		 2883 return status;
2884}
2885
2ed4b95b
CL		 2886static int nfs4_do_find_root_sec(struct nfs_server *server,
2887 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2888{
2889 int mv = server->nfs_client->cl_minorversion;
2890 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2891}
2892
2893/**
2894 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2895 * @server: initialized nfs_server handle
2896 * @fhandle: we fill in the pseudo-fs root file handle
2897 * @info: we fill in an FSINFO struct
5e6b1990 2898 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2899 *
2900 * Returns zero on success, or a negative errno.
801a16dc 2901 */
3028eb2b 2902int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2903 struct nfs_fsinfo *info,
2904 bool auth_probe)
801a16dc 2905{
2ed4b95b
CL		 2906 int status;
2907
5e6b1990
TM		 2908 switch (auth_probe) {
2909 case false:
2910 status = nfs4_lookup_root(server, fhandle, info);
2911 if (status != -NFS4ERR_WRONGSEC)
2912 break;
2913 /* Did user force a 'sec=' mount option? */
2914 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2915 break;
2916 default:
2ed4b95b 2917 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2918 }
2ed4b95b 2919
1da177e4
LT		 2920 if (status == 0)
2921 status = nfs4_server_capabilities(server, fhandle);
2922 if (status == 0)
2923 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2924
c12e87f4 2925 return nfs4_map_errors(status);
1da177e4
LT		 2926}
2927
bae36241
BS		 2928static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2929 struct nfs_fsinfo *info)
2930{
2931 int error;
2932 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2933 struct nfs4_label *label = NULL;
bae36241
BS		 2934
2935 error = nfs4_server_capabilities(server, mntfh);
2936 if (error < 0) {
2937 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2938 return error;
2939 }
2940
14c43f76
DQ		 2941 label = nfs4_label_alloc(server, GFP_KERNEL);
2942 if (IS_ERR(label))
2943 return PTR_ERR(label);
2944
1775fd3e 2945 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2946 if (error < 0) {
2947 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2948 goto err_free_label;
bae36241
BS		 2949 }
2950
2951 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2952 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2953 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2954
14c43f76
DQ		 2955err_free_label:
2956 nfs4_label_free(label);
2957
bae36241
BS		 2958 return error;
2959}
2960
6b97fd3d
MN		 2961/*
2962 * Get locations and (maybe) other attributes of a referral.
2963 * Note that we'll actually follow the referral later when
2964 * we detect fsid mismatch in inode revalidation
2965 */
f05d147f
BS		 2966static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2967 const struct qstr *name, struct nfs_fattr *fattr,
2968 struct nfs_fh *fhandle)
6b97fd3d
MN		 2969{
2970 int status = -ENOMEM;
2971 struct page *page = NULL;
2972 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2973
2974 page = alloc_page(GFP_KERNEL);
2975 if (page == NULL)
2976 goto out;
2977 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2978 if (locations == NULL)
2979 goto out;
2980
f05d147f 2981 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2982 if (status != 0)
2983 goto out;
519ae255
CL		 2984
2985 /*
2986 * If the fsid didn't change, this is a migration event, not a
2987 * referral. Cause us to drop into the exception handler, which
2988 * will kick off migration recovery.
2989 */
6b97fd3d 2990 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2991 dprintk("%s: server did not return a different fsid for"
2992 " a referral at %s\n", __func__, name->name);
519ae255 2993 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 2994 goto out;
2995 }
533eb461
AA		 2996 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2997 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2998
533eb461 2999 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3000 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3001 memset(fhandle, 0, sizeof(struct nfs_fh));
3002out:
3003 if (page)
3004 __free_page(page);
5d7ca35a 3005 kfree(locations);
6b97fd3d
MN		 3006 return status;
3007}
3008
1775fd3e
DQ		 3009static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3010 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3011{
3012 struct nfs4_getattr_arg args = {
3013 .fh = fhandle,
3014 .bitmask = server->attr_bitmask,
3015 };
3016 struct nfs4_getattr_res res = {
3017 .fattr = fattr,
1775fd3e 3018 .label = label,
1da177e4
LT		 3019 .server = server,
3020 };
3021 struct rpc_message msg = {
3022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3023 .rpc_argp = &args,
3024 .rpc_resp = &res,
3025 };
aa9c2669
DQ		 3026
3027 args.bitmask = nfs4_bitmask(server, label);
3028
0e574af1 3029 nfs_fattr_init(fattr);
7c513058 3030 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3031}
3032
1775fd3e
DQ		 3033static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3034 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3035{
3036 struct nfs4_exception exception = { };
3037 int err;
3038 do {
b5f875a9
TM		 3039 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3040 trace_nfs4_getattr(server, fhandle, fattr, err);
3041 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3042 &exception);
3043 } while (exception.retry);
3044 return err;
3045}
3046
3047/*
3048 * The file is not closed if it is opened due to the a request to change
3049 * the size of the file. The open call will not be needed once the
3050 * VFS layer lookup-intents are implemented.
3051 *
3052 * Close is called when the inode is destroyed.
3053 * If we haven't opened the file for O_WRONLY, we
3054 * need to in the size_change case to obtain a stateid.
3055 *
3056 * Got race?
3057 * Because OPEN is always done by name in nfsv4, it is
3058 * possible that we opened a different file by the same
3059 * name. We can recognize this race condition, but we
3060 * can't do anything about it besides returning an error.
3061 *
3062 * This will be fixed with VFS changes (lookup-intent).
3063 */
3064static int
3065nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3066 struct iattr *sattr)
3067{
08e9eac4 3068 struct inode *inode = dentry->d_inode;
659bfcd6 3069 struct rpc_cred *cred = NULL;
d530838b 3070 struct nfs4_state *state = NULL;
14c43f76 3071 struct nfs4_label *label = NULL;
1da177e4
LT		 3072 int status;
3073
8a1636c4 3074 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3075 pnfs_commit_and_return_layout(inode);
8a1636c4 3076
0e574af1 3077 nfs_fattr_init(fattr);
1da177e4 3078
2669940d
AA		 3079 /* Deal with open(O_TRUNC) */
3080 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3081 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3082
3083 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3084 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3085 return 0;
3086
d530838b 3087 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3088 if (sattr->ia_valid & ATTR_FILE) {
3089 struct nfs_open_context *ctx;
3090
3091 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3092 if (ctx) {
3093 cred = ctx->cred;
3094 state = ctx->state;
3095 }
659bfcd6 3096 }
08e9eac4 3097
14c43f76
DQ		 3098 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3099 if (IS_ERR(label))
3100 return PTR_ERR(label);
3101
3102 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3103 if (status == 0) {
65e4308d 3104 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3105 nfs_setsecurity(inode, fattr, label);
3106 }
14c43f76 3107 nfs4_label_free(label);
1da177e4
LT		 3108 return status;
3109}
3110
0c2e53f1
TM		 3111static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3112 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3113 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3114{
0c2e53f1 3115 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3116 int status;
3117 struct nfs4_lookup_arg args = {
3118 .bitmask = server->attr_bitmask,
0c2e53f1 3119 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3120 .name = name,
3121 };
3122 struct nfs4_lookup_res res = {
3123 .server = server,
3124 .fattr = fattr,
aa9c2669 3125 .label = label,
2b3de441
DH		 3126 .fh = fhandle,
3127 };
3128 struct rpc_message msg = {
3129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3130 .rpc_argp = &args,
3131 .rpc_resp = &res,
3132 };
3133
aa9c2669
DQ		 3134 args.bitmask = nfs4_bitmask(server, label);
3135
2b3de441
DH		 3136 nfs_fattr_init(fattr);
3137
1da177e4 3138 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3139 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3140 dprintk("NFS reply lookup: %d\n", status);
3141 return status;
3142}
3143
72de53ec 3144static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3145{
7ebb9315 3146 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3147 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3148 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3149 fattr->nlink = 2;
3150}
3151
72de53ec
BS		 3152static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3153 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3154 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3155{
3156 struct nfs4_exception exception = { };
72de53ec 3157 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3158 int err;
3159 do {
1775fd3e 3160 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3161 trace_nfs4_lookup(dir, name, err);
72de53ec 3162 switch (err) {
08ef7bd3 3163 case -NFS4ERR_BADNAME:
72de53ec
BS		 3164 err = -ENOENT;
3165 goto out;
0c2e53f1 3166 case -NFS4ERR_MOVED:
f05d147f 3167 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3168 goto out;
0c2e53f1 3169 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3170 err = -EPERM;
3171 if (client != *clnt)
3172 goto out;
41d058c3
TM		 3173 /* No security negotiation if the user specified 'sec=' */
3174 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3175 goto out;
72de53ec
BS		 3176 client = nfs4_create_sec_client(client, dir, name);
3177 if (IS_ERR(client))
3178 return PTR_ERR(client);
3179
3180 exception.retry = 1;
3181 break;
3182 default:
3183 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3184 }
1da177e4 3185 } while (exception.retry);
72de53ec
BS		 3186
3187out:
3188 if (err == 0)
3189 *clnt = client;
3190 else if (client != *clnt)
3191 rpc_shutdown_client(client);
3192
1da177e4
LT		 3193 return err;
3194}
3195
80a16b21 3196static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3197 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3198 struct nfs4_label *label)
72de53ec
BS		 3199{
3200 int status;
3201 struct rpc_clnt *client = NFS_CLIENT(dir);
3202
1775fd3e 3203 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3204 if (client != NFS_CLIENT(dir)) {
3205 rpc_shutdown_client(client);
3206 nfs_fixup_secinfo_attributes(fattr);
3207 }
3208 return status;
3209}
3210
f05d147f
BS		 3211struct rpc_clnt *
3212nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3213 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3214{
b72888cb 3215 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3216 int status;
f05d147f 3217
1775fd3e 3218 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3219 if (status < 0)
f05d147f 3220 return ERR_PTR(status);
b72888cb 3221 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3222}
3223
1da177e4
LT		 3224static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3225{
76b32999 3226 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3227 struct nfs4_accessargs args = {
3228 .fh = NFS_FH(inode),
a4980e78 3229 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3230 };
3231 struct nfs4_accessres res = {
3232 .server = server,
1da177e4 3233 };
1da177e4
LT		 3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3236 .rpc_argp = &args,
3237 .rpc_resp = &res,
3238 .rpc_cred = entry->cred,
3239 };
3240 int mode = entry->mask;
aa9c2669 3241 int status = 0;
1da177e4
LT		 3242
3243 /*
3244 * Determine which access bits we want to ask for...
3245 */
3246 if (mode & MAY_READ)
3247 args.access |= NFS4_ACCESS_READ;
3248 if (S_ISDIR(inode->i_mode)) {
3249 if (mode & MAY_WRITE)
3250 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3251 if (mode & MAY_EXEC)
3252 args.access |= NFS4_ACCESS_LOOKUP;
3253 } else {
3254 if (mode & MAY_WRITE)
3255 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3256 if (mode & MAY_EXEC)
3257 args.access |= NFS4_ACCESS_EXECUTE;
3258 }
c407d41a
TM		 3259
3260 res.fattr = nfs_alloc_fattr();
3261 if (res.fattr == NULL)
3262 return -ENOMEM;
3263
7c513058 3264 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3265 if (!status) {
6168f62c 3266 nfs_access_set_mask(entry, res.access);
c407d41a 3267 nfs_refresh_inode(inode, res.fattr);
1da177e4 3268 }
c407d41a 3269 nfs_free_fattr(res.fattr);
1da177e4
LT		 3270 return status;
3271}
3272
3273static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3274{
3275 struct nfs4_exception exception = { };
3276 int err;
3277 do {
c1578b76
TM		 3278 err = _nfs4_proc_access(inode, entry);
3279 trace_nfs4_access(inode, err);
3280 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3281 &exception);
3282 } while (exception.retry);
3283 return err;
3284}
3285
3286/*
3287 * TODO: For the time being, we don't try to get any attributes
3288 * along with any of the zero-copy operations READ, READDIR,
3289 * READLINK, WRITE.
3290 *
3291 * In the case of the first three, we want to put the GETATTR
3292 * after the read-type operation -- this is because it is hard
3293 * to predict the length of a GETATTR response in v4, and thus
3294 * align the READ data correctly. This means that the GETATTR
3295 * may end up partially falling into the page cache, and we should
3296 * shift it into the 'tail' of the xdr_buf before processing.
3297 * To do this efficiently, we need to know the total length
3298 * of data received, which doesn't seem to be available outside
3299 * of the RPC layer.
3300 *
3301 * In the case of WRITE, we also want to put the GETATTR after
3302 * the operation -- in this case because we want to make sure
140150db 3303 * we get the post-operation mtime and size.
1da177e4
LT		 3304 *
3305 * Both of these changes to the XDR layer would in fact be quite
3306 * minor, but I decided to leave them for a subsequent patch.
3307 */
3308static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3309 unsigned int pgbase, unsigned int pglen)
3310{
3311 struct nfs4_readlink args = {
3312 .fh = NFS_FH(inode),
3313 .pgbase = pgbase,
3314 .pglen = pglen,
3315 .pages = &page,
3316 };
f50c7000 3317 struct nfs4_readlink_res res;
1da177e4
LT		 3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3320 .rpc_argp = &args,
f50c7000 3321 .rpc_resp = &res,
1da177e4
LT		 3322 };
3323
7c513058 3324 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3325}
3326
3327static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3328 unsigned int pgbase, unsigned int pglen)
3329{
3330 struct nfs4_exception exception = { };
3331 int err;
3332 do {
c1578b76
TM		 3333 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3334 trace_nfs4_readlink(inode, err);
3335 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3336 &exception);
3337 } while (exception.retry);
3338 return err;
3339}
3340
1da177e4 3341/*
8867fe58 3342 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3343 */
1da177e4
LT		 3344static int
3345nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3346 int flags)
1da177e4 3347{
aa9c2669 3348 struct nfs4_label l, *ilabel = NULL;
8867fe58 3349 struct nfs_open_context *ctx;
1da177e4 3350 struct nfs4_state *state;
5bc2afc2 3351 int opened = 0;
1da177e4
LT		 3352 int status = 0;
3353
8867fe58
MS		 3354 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3355 if (IS_ERR(ctx))
3356 return PTR_ERR(ctx);
3357
aa9c2669
DQ		 3358 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3359
a8a5da99 3360 sattr->ia_mode &= ~current_umask();
5bc2afc2 3361 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3362 if (IS_ERR(state)) {
3363 status = PTR_ERR(state);
c0204fd2 3364 goto out;
1da177e4 3365 }
1da177e4 3366out:
aa9c2669 3367 nfs4_label_release_security(ilabel);
8867fe58 3368 put_nfs_open_context(ctx);
1da177e4
LT		 3369 return status;
3370}
3371
3372static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3373{
16e42959 3374 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3375 struct nfs_removeargs args = {
1da177e4 3376 .fh = NFS_FH(dir),
26fe5750 3377 .name = *name,
16e42959 3378 };
4fdc17b2 3379 struct nfs_removeres res = {
16e42959 3380 .server = server,
1da177e4 3381 };
1da177e4 3382 struct rpc_message msg = {
4fdc17b2
TM		 3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3384 .rpc_argp = &args,
3385 .rpc_resp = &res,
1da177e4 3386 };
778d2817 3387 int status;
1da177e4 3388
7c513058 3389 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3390 if (status == 0)
16e42959 3391 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3392 return status;
3393}
3394
3395static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3396{
3397 struct nfs4_exception exception = { };
3398 int err;
3399 do {
078ea3df
TM		 3400 err = _nfs4_proc_remove(dir, name);
3401 trace_nfs4_remove(dir, name, err);
3402 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3403 &exception);
3404 } while (exception.retry);
3405 return err;
3406}
3407
e4eff1a6 3408static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3409{
e4eff1a6
TM		 3410 struct nfs_server *server = NFS_SERVER(dir);
3411 struct nfs_removeargs *args = msg->rpc_argp;
3412 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3413
e4eff1a6 3414 res->server = server;
1da177e4 3415 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3416 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3417
3418 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3419}
3420
34e137cc
BS		 3421static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3422{
d9afbd1b
TM		 3423 nfs4_setup_sequence(NFS_SERVER(data->dir),
3424 &data->args.seq_args,
3425 &data->res.seq_res,
3426 task);
1da177e4
LT		 3427}
3428
e4eff1a6 3429static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3430{
078ea3df
TM		 3431 struct nfs_unlinkdata *data = task->tk_calldata;
3432 struct nfs_removeres *res = &data->res;
e4eff1a6 3433
14516c3a
TM		 3434 if (!nfs4_sequence_done(task, &res->seq_res))
3435 return 0;
9e33bed5 3436 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3437 return 0;
3438 update_changeattr(dir, &res->cinfo);
e4eff1a6 3439 return 1;
1da177e4
LT		 3440}
3441
d3d4152a
JL		 3442static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3443{
3444 struct nfs_server *server = NFS_SERVER(dir);
3445 struct nfs_renameargs *arg = msg->rpc_argp;
3446 struct nfs_renameres *res = msg->rpc_resp;
3447
3448 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3449 res->server = server;
a9c92d6b 3450 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3451}
3452
c6bfa1a1
BS		 3453static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3454{
d9afbd1b
TM		 3455 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3456 &data->args.seq_args,
3457 &data->res.seq_res,
3458 task);
d3d4152a
JL		 3459}
3460
3461static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3462 struct inode *new_dir)
3463{
fbc6f7c2
TM		 3464 struct nfs_renamedata *data = task->tk_calldata;
3465 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3466
3467 if (!nfs4_sequence_done(task, &res->seq_res))
3468 return 0;
3469 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3470 return 0;
3471
3472 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3473 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3474 return 1;
3475}
3476
1da177e4
LT		 3477static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3478 struct inode *new_dir, struct qstr *new_name)
3479{
6caf2c82 3480 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3481 struct nfs_renameargs arg = {
1da177e4
LT		 3482 .old_dir = NFS_FH(old_dir),
3483 .new_dir = NFS_FH(new_dir),
3484 .old_name = old_name,
3485 .new_name = new_name,
6caf2c82 3486 };
e8582a8b 3487 struct nfs_renameres res = {
6caf2c82 3488 .server = server,
1da177e4 3489 };
1da177e4
LT		 3490 struct rpc_message msg = {
3491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3492 .rpc_argp = &arg,
3493 .rpc_resp = &res,
3494 };
011fff72 3495 int status = -ENOMEM;
14c43f76 3496
7c513058 3497 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3498 if (!status) {
3499 update_changeattr(old_dir, &res.old_cinfo);
3500 update_changeattr(new_dir, &res.new_cinfo);
3501 }
3502 return status;
3503}
3504
3505static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3506 struct inode *new_dir, struct qstr *new_name)
3507{
3508 struct nfs4_exception exception = { };
3509 int err;
3510 do {
fbc6f7c2
TM		 3511 err = _nfs4_proc_rename(old_dir, old_name,
3512 new_dir, new_name);
3513 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3514 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3515 &exception);
3516 } while (exception.retry);
3517 return err;
3518}
3519
3520static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3521{
91ba2eee 3522 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3523 struct nfs4_link_arg arg = {
3524 .fh = NFS_FH(inode),
3525 .dir_fh = NFS_FH(dir),
3526 .name = name,
91ba2eee
TM		 3527 .bitmask = server->attr_bitmask,
3528 };
91ba2eee
TM		 3529 struct nfs4_link_res res = {
3530 .server = server,
1775fd3e 3531 .label = NULL,
1da177e4 3532 };
1da177e4
LT		 3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3535 .rpc_argp = &arg,
91ba2eee 3536 .rpc_resp = &res,
1da177e4 3537 };
136f2627
TM		 3538 int status = -ENOMEM;
3539
3540 res.fattr = nfs_alloc_fattr();
778d2817 3541 if (res.fattr == NULL)
136f2627 3542 goto out;
1da177e4 3543
14c43f76
DQ		 3544 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3545 if (IS_ERR(res.label)) {
3546 status = PTR_ERR(res.label);
3547 goto out;
3548 }
aa9c2669 3549 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3550
7c513058 3551 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3552 if (!status) {
3553 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3554 status = nfs_post_op_update_inode(inode, res.fattr);
3555 if (!status)
3556 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3557 }
14c43f76
DQ		 3558
3559
3560 nfs4_label_free(res.label);
3561
136f2627 3562out:
136f2627 3563 nfs_free_fattr(res.fattr);
1da177e4
LT		 3564 return status;
3565}
3566
3567static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3568{
3569 struct nfs4_exception exception = { };
3570 int err;
3571 do {
3572 err = nfs4_handle_exception(NFS_SERVER(inode),
3573 _nfs4_proc_link(inode, dir, name),
3574 &exception);
3575 } while (exception.retry);
3576 return err;
3577}
3578
57dc9a57
TM		 3579struct nfs4_createdata {
3580 struct rpc_message msg;
3581 struct nfs4_create_arg arg;
3582 struct nfs4_create_res res;
3583 struct nfs_fh fh;
3584 struct nfs_fattr fattr;
1775fd3e 3585 struct nfs4_label *label;
57dc9a57
TM		 3586};
3587
3588static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3589 struct qstr *name, struct iattr *sattr, u32 ftype)
3590{
3591 struct nfs4_createdata *data;
3592
3593 data = kzalloc(sizeof(*data), GFP_KERNEL);
3594 if (data != NULL) {
3595 struct nfs_server *server = NFS_SERVER(dir);
3596
14c43f76
DQ		 3597 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3598 if (IS_ERR(data->label))
3599 goto out_free;
3600
57dc9a57
TM		 3601 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3602 data->msg.rpc_argp = &data->arg;
3603 data->msg.rpc_resp = &data->res;
3604 data->arg.dir_fh = NFS_FH(dir);
3605 data->arg.server = server;
3606 data->arg.name = name;
3607 data->arg.attrs = sattr;
3608 data->arg.ftype = ftype;
aa9c2669 3609 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3610 data->res.server = server;
3611 data->res.fh = &data->fh;
3612 data->res.fattr = &data->fattr;
1775fd3e 3613 data->res.label = data->label;
57dc9a57 3614 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3615 }
3616 return data;
14c43f76
DQ		 3617out_free:
3618 kfree(data);
3619 return NULL;
57dc9a57
TM		 3620}
3621
3622static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3623{
7c513058 3624 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3625 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3626 if (status == 0) {
3627 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3628 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3629 }
3630 return status;
3631}
3632
3633static void nfs4_free_createdata(struct nfs4_createdata *data)
3634{
14c43f76 3635 nfs4_label_free(data->label);
57dc9a57
TM		 3636 kfree(data);
3637}
3638
4f390c15 3639static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3640 struct page *page, unsigned int len, struct iattr *sattr,
3641 struct nfs4_label *label)
1da177e4 3642{
57dc9a57
TM		 3643 struct nfs4_createdata *data;
3644 int status = -ENAMETOOLONG;
1da177e4 3645
94a6d753 3646 if (len > NFS4_MAXPATHLEN)
57dc9a57 3647 goto out;
4f390c15 3648
57dc9a57
TM		 3649 status = -ENOMEM;
3650 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3651 if (data == NULL)
3652 goto out;
3653
3654 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3655 data->arg.u.symlink.pages = &page;
3656 data->arg.u.symlink.len = len;
1775fd3e 3657 data->arg.label = label;
1da177e4 3658
57dc9a57
TM		 3659 status = nfs4_do_create(dir, dentry, data);
3660
3661 nfs4_free_createdata(data);
3662out:
1da177e4
LT		 3663 return status;
3664}
3665
4f390c15 3666static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3667 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3668{
3669 struct nfs4_exception exception = { };
aa9c2669 3670 struct nfs4_label l, *label = NULL;
1da177e4 3671 int err;
aa9c2669
DQ		 3672
3673 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3674
1da177e4 3675 do {
078ea3df
TM		 3676 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3677 trace_nfs4_symlink(dir, &dentry->d_name, err);
3678 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3679 &exception);
3680 } while (exception.retry);
aa9c2669
DQ		 3681
3682 nfs4_label_release_security(label);
1da177e4
LT		 3683 return err;
3684}
3685
3686static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3687 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3688{
57dc9a57
TM		 3689 struct nfs4_createdata *data;
3690 int status = -ENOMEM;
1da177e4 3691
57dc9a57
TM		 3692 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3693 if (data == NULL)
3694 goto out;
3695
1775fd3e 3696 data->arg.label = label;
57dc9a57
TM		 3697 status = nfs4_do_create(dir, dentry, data);
3698
3699 nfs4_free_createdata(data);
3700out:
1da177e4
LT		 3701 return status;
3702}
3703
3704static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3705 struct iattr *sattr)
3706{
3707 struct nfs4_exception exception = { };
aa9c2669 3708 struct nfs4_label l, *label = NULL;
1da177e4 3709 int err;
a8a5da99 3710
aa9c2669
DQ		 3711 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3712
a8a5da99 3713 sattr->ia_mode &= ~current_umask();
1da177e4 3714 do {
078ea3df
TM		 3715 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3716 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3717 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3718 &exception);
3719 } while (exception.retry);
aa9c2669
DQ		 3720 nfs4_label_release_security(label);
3721
1da177e4
LT		 3722 return err;
3723}
3724
3725static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3726 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3727{
3728 struct inode *dir = dentry->d_inode;
3729 struct nfs4_readdir_arg args = {
3730 .fh = NFS_FH(dir),
56e4ebf8 3731 .pages = pages,
1da177e4
LT		 3732 .pgbase = 0,
3733 .count = count,
96d25e53 3734 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3735 .plus = plus,
1da177e4
LT		 3736 };
3737 struct nfs4_readdir_res res;
3738 struct rpc_message msg = {
3739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3740 .rpc_argp = &args,
3741 .rpc_resp = &res,
3742 .rpc_cred = cred,
3743 };
3744 int status;
3745
3110ff80 3746 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3747 dentry->d_parent->d_name.name,
3748 dentry->d_name.name,
3749 (unsigned long long)cookie);
c3f52af3 3750 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3751 res.pgbase = args.pgbase;
7c513058 3752 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3753 if (status >= 0) {
c3f52af3 3754 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3755 status += args.pgbase;
3756 }
c4812998
TM		 3757
3758 nfs_invalidate_atime(dir);
3759
3110ff80 3760 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3761 return status;
3762}
3763
3764static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3765 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3766{
3767 struct nfs4_exception exception = { };
3768 int err;
3769 do {
c1578b76
TM		 3770 err = _nfs4_proc_readdir(dentry, cred, cookie,
3771 pages, count, plus);
3772 trace_nfs4_readdir(dentry->d_inode, err);
3773 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3774 &exception);
3775 } while (exception.retry);
3776 return err;
3777}
3778
3779static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3780 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3781{
57dc9a57
TM		 3782 struct nfs4_createdata *data;
3783 int mode = sattr->ia_mode;
3784 int status = -ENOMEM;
1da177e4 3785
57dc9a57
TM		 3786 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3787 if (data == NULL)
3788 goto out;
3789
1da177e4 3790 if (S_ISFIFO(mode))
57dc9a57 3791 data->arg.ftype = NF4FIFO;
1da177e4 3792 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3793 data->arg.ftype = NF4BLK;
3794 data->arg.u.device.specdata1 = MAJOR(rdev);
3795 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3796 }
3797 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3798 data->arg.ftype = NF4CHR;
3799 data->arg.u.device.specdata1 = MAJOR(rdev);
3800 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3801 } else if (!S_ISSOCK(mode)) {
3802 status = -EINVAL;
3803 goto out_free;
1da177e4 3804 }
1775fd3e 3805
aa9c2669 3806 data->arg.label = label;
57dc9a57 3807 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3808out_free:
57dc9a57
TM		 3809 nfs4_free_createdata(data);
3810out:
1da177e4
LT		 3811 return status;
3812}
3813
3814static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3815 struct iattr *sattr, dev_t rdev)
3816{
3817 struct nfs4_exception exception = { };
aa9c2669 3818 struct nfs4_label l, *label = NULL;
1da177e4 3819 int err;
a8a5da99 3820
aa9c2669
DQ		 3821 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3822
a8a5da99 3823 sattr->ia_mode &= ~current_umask();
1da177e4 3824 do {
078ea3df
TM		 3825 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3826 trace_nfs4_mknod(dir, &dentry->d_name, err);
3827 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3828 &exception);
3829 } while (exception.retry);
aa9c2669
DQ		 3830
3831 nfs4_label_release_security(label);
3832
1da177e4
LT		 3833 return err;
3834}
3835
3836static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3837 struct nfs_fsstat *fsstat)
3838{
3839 struct nfs4_statfs_arg args = {
3840 .fh = fhandle,
3841 .bitmask = server->attr_bitmask,
3842 };
24ad148a
BH		 3843 struct nfs4_statfs_res res = {
3844 .fsstat = fsstat,
3845 };
1da177e4
LT		 3846 struct rpc_message msg = {
3847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3848 .rpc_argp = &args,
24ad148a 3849 .rpc_resp = &res,
1da177e4
LT		 3850 };
3851
0e574af1 3852 nfs_fattr_init(fsstat->fattr);
7c513058 3853 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3854}
3855
3856static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3857{
3858 struct nfs4_exception exception = { };
3859 int err;
3860 do {
3861 err = nfs4_handle_exception(server,
3862 _nfs4_proc_statfs(server, fhandle, fsstat),
3863 &exception);
3864 } while (exception.retry);
3865 return err;
3866}
3867
3868static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3869 struct nfs_fsinfo *fsinfo)
3870{
3871 struct nfs4_fsinfo_arg args = {
3872 .fh = fhandle,
3873 .bitmask = server->attr_bitmask,
3874 };
3dda5e43
BH		 3875 struct nfs4_fsinfo_res res = {
3876 .fsinfo = fsinfo,
3877 };
1da177e4
LT		 3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3880 .rpc_argp = &args,
3dda5e43 3881 .rpc_resp = &res,
1da177e4
LT		 3882 };
3883
7c513058 3884 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3885}
3886
3887static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3888{
3889 struct nfs4_exception exception = { };
83ca7f5a 3890 unsigned long now = jiffies;
1da177e4
LT		 3891 int err;
3892
3893 do {
83ca7f5a 3894 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3895 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3896 if (err == 0) {
3897 struct nfs_client *clp = server->nfs_client;
3898
3899 spin_lock(&clp->cl_lock);
3900 clp->cl_lease_time = fsinfo->lease_time * HZ;
3901 clp->cl_last_renewal = now;
3902 spin_unlock(&clp->cl_lock);
3903 break;
3904 }
3905 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3906 } while (exception.retry);
3907 return err;
3908}
3909
3910static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3911{
e38eb650
BS		 3912 int error;
3913
0e574af1 3914 nfs_fattr_init(fsinfo->fattr);
e38eb650 3915 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3916 if (error == 0) {
3917 /* block layout checks this! */
3918 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3919 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3920 }
e38eb650
BS		 3921
3922 return error;
1da177e4
LT		 3923}
3924
3925static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3926 struct nfs_pathconf *pathconf)
3927{
3928 struct nfs4_pathconf_arg args = {
3929 .fh = fhandle,
3930 .bitmask = server->attr_bitmask,
3931 };
d45b2989
BH		 3932 struct nfs4_pathconf_res res = {
3933 .pathconf = pathconf,
3934 };
1da177e4
LT		 3935 struct rpc_message msg = {
3936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3937 .rpc_argp = &args,
d45b2989 3938 .rpc_resp = &res,
1da177e4
LT		 3939 };
3940
3941 /* None of the pathconf attributes are mandatory to implement */
3942 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3943 memset(pathconf, 0, sizeof(*pathconf));
3944 return 0;
3945 }
3946
0e574af1 3947 nfs_fattr_init(pathconf->fattr);
7c513058 3948 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3949}
3950
3951static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3952 struct nfs_pathconf *pathconf)
3953{
3954 struct nfs4_exception exception = { };
3955 int err;
3956
3957 do {
3958 err = nfs4_handle_exception(server,
3959 _nfs4_proc_pathconf(server, fhandle, pathconf),
3960 &exception);
3961 } while (exception.retry);
3962 return err;
3963}
3964
5521abfd 3965int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3966 const struct nfs_open_context *ctx,
3967 const struct nfs_lock_context *l_ctx,
3968 fmode_t fmode)
3969{
3970 const struct nfs_lockowner *lockowner = NULL;
3971
3972 if (l_ctx != NULL)
3973 lockowner = &l_ctx->lockowner;
5521abfd 3974 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3975}
3976EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3977
5521abfd
TM		 3978static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3979 const struct nfs_open_context *ctx,
3980 const struct nfs_lock_context *l_ctx,
3981 fmode_t fmode)
3982{
3983 nfs4_stateid current_stateid;
3984
3985 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3986 return false;
3987 return nfs4_stateid_match(stateid, &current_stateid);
3988}
3989
3990static bool nfs4_error_stateid_expired(int err)
3991{
3992 switch (err) {
3993 case -NFS4ERR_DELEG_REVOKED:
3994 case -NFS4ERR_ADMIN_REVOKED:
3995 case -NFS4ERR_BAD_STATEID:
3996 case -NFS4ERR_STALE_STATEID:
3997 case -NFS4ERR_OLD_STATEID:
3998 case -NFS4ERR_OPENMODE:
3999 case -NFS4ERR_EXPIRED:
4000 return true;
4001 }
4002 return false;
4003}
4004
d20581aa
BH		 4005void __nfs4_read_done_cb(struct nfs_read_data *data)
4006{
cd841605 4007 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4008}
4009
cbdabc7f 4010static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4011{
cd841605 4012 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4013
cc668ab3 4014 trace_nfs4_read(data, task->tk_status);
9e33bed5 4015 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4016 rpc_restart_call_prepare(task);
ec06c096 4017 return -EAGAIN;
1da177e4 4018 }
8850df99 4019
d20581aa 4020 __nfs4_read_done_cb(data);
1da177e4 4021 if (task->tk_status > 0)
ec06c096
TM		 4022 renew_lease(server, data->timestamp);
4023 return 0;
1da177e4
LT		 4024}
4025
5521abfd
TM		 4026static bool nfs4_read_stateid_changed(struct rpc_task *task,
4027 struct nfs_readargs *args)
4028{
4029
4030 if (!nfs4_error_stateid_expired(task->tk_status) ||
4031 nfs4_stateid_is_current(&args->stateid,
4032 args->context,
4033 args->lock_context,
4034 FMODE_READ))
4035 return false;
4036 rpc_restart_call_prepare(task);
4037 return true;
4038}
4039
cbdabc7f
AA		 4040static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4041{
4042
4043 dprintk("--> %s\n", __func__);
4044
4045 if (!nfs4_sequence_done(task, &data->res.seq_res))
4046 return -EAGAIN;
5521abfd
TM		 4047 if (nfs4_read_stateid_changed(task, &data->args))
4048 return -EAGAIN;
d20581aa
BH		 4049 return data->read_done_cb ? data->read_done_cb(task, data) :
4050 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4051}
4052
bdc7f021 4053static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4054{
1da177e4 4055 data->timestamp = jiffies;
cbdabc7f 4056 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4057 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4058 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4059}
4060
ef1820f9 4061static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4062{
9b206149 4063 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4064 &data->args.seq_args,
4065 &data->res.seq_res,
9b206149 4066 task))
ef1820f9
N		 4067 return 0;
4068 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4069 data->args.lock_context, FMODE_READ) == -EIO)
4070 return -EIO;
4071 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4072 return -EIO;
4073 return 0;
1da177e4
LT		 4074}
4075
b029bc9b 4076static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4077{
cd841605 4078 struct inode *inode = data->header->inode;
1da177e4 4079
cc668ab3 4080 trace_nfs4_write(data, task->tk_status);
9e33bed5 4081 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4082 rpc_restart_call_prepare(task);
788e7a89 4083 return -EAGAIN;
1da177e4 4084 }
4f9838c7 4085 if (task->tk_status >= 0) {
1da177e4 4086 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4087 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4088 }
788e7a89 4089 return 0;
1da177e4
LT		 4090}
4091
5521abfd
TM		 4092static bool nfs4_write_stateid_changed(struct rpc_task *task,
4093 struct nfs_writeargs *args)
4094{
4095
4096 if (!nfs4_error_stateid_expired(task->tk_status) ||
4097 nfs4_stateid_is_current(&args->stateid,
4098 args->context,
4099 args->lock_context,
4100 FMODE_WRITE))
4101 return false;
4102 rpc_restart_call_prepare(task);
4103 return true;
4104}
4105
b029bc9b
FI		 4106static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4107{
4108 if (!nfs4_sequence_done(task, &data->res.seq_res))
4109 return -EAGAIN;
5521abfd
TM		 4110 if (nfs4_write_stateid_changed(task, &data->args))
4111 return -EAGAIN;
d20581aa
BH		 4112 return data->write_done_cb ? data->write_done_cb(task, data) :
4113 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4114}
4115
5a37f851
TM		 4116static
4117bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4118{
5a37f851
TM		 4119 const struct nfs_pgio_header *hdr = data->header;
4120
4121 /* Don't request attributes for pNFS or O_DIRECT writes */
4122 if (data->ds_clp != NULL || hdr->dreq != NULL)
4123 return false;
4124 /* Otherwise, request attributes if and only if we don't hold
4125 * a delegation
4126 */
011e2a7f 4127 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4128}
a69aef14 4129
bdc7f021 4130static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4131{
cd841605 4132 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4133
5a37f851 4134 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4135 data->args.bitmask = NULL;
4136 data->res.fattr = NULL;
4137 } else
4138 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4139
b029bc9b
FI		 4140 if (!data->write_done_cb)
4141 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4142 data->res.server = server;
1da177e4
LT		 4143 data->timestamp = jiffies;
4144
bdc7f021 4145 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4146 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4147}
4148
ef1820f9 4149static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4150{
9b206149 4151 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4152 &data->args.seq_args,
4153 &data->res.seq_res,
9b206149 4154 task))
ef1820f9
N		 4155 return 0;
4156 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4157 data->args.lock_context, FMODE_WRITE) == -EIO)
4158 return -EIO;
4159 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4160 return -EIO;
4161 return 0;
1da177e4
LT		 4162}
4163
0b7c0153 4164static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4165{
d9afbd1b
TM		 4166 nfs4_setup_sequence(NFS_SERVER(data->inode),
4167 &data->args.seq_args,
4168 &data->res.seq_res,
4169 task);
1da177e4
LT		 4170}
4171
0b7c0153 4172static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4173{
1da177e4 4174 struct inode *inode = data->inode;
14516c3a 4175
cc668ab3 4176 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4177 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4178 rpc_restart_call_prepare(task);
788e7a89 4179 return -EAGAIN;
1da177e4 4180 }
788e7a89 4181 return 0;
1da177e4
LT		 4182}
4183
0b7c0153 4184static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4185{
4186 if (!nfs4_sequence_done(task, &data->res.seq_res))
4187 return -EAGAIN;
0b7c0153 4188 return data->commit_done_cb(task, data);
5f452431
FI		 4189}
4190
0b7c0153 4191static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4192{
788e7a89 4193 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4194
0b7c0153
FI		 4195 if (data->commit_done_cb == NULL)
4196 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4197 data->res.server = server;
bdc7f021 4198 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4199 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4200}
4201
9bc4e3ca
CL		 4202struct nfs4_renewdata {
4203 struct nfs_client *client;
4204 unsigned long timestamp;
4205};
4206
1da177e4
LT		 4207/*
4208 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4209 * standalone procedure for queueing an asynchronous RENEW.
4210 */
9bc4e3ca 4211static void nfs4_renew_release(void *calldata)
dc96aef9 4212{
9bc4e3ca
CL		 4213 struct nfs4_renewdata *data = calldata;
4214 struct nfs_client *clp = data->client;
dc96aef9 4215
0851de06
AB		 4216 if (atomic_read(&clp->cl_count) > 1)
4217 nfs4_schedule_state_renewal(clp);
4218 nfs_put_client(clp);
9bc4e3ca 4219 kfree(data);
dc96aef9
AB		 4220}
4221
9bc4e3ca 4222static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4223{
9bc4e3ca
CL		 4224 struct nfs4_renewdata *data = calldata;
4225 struct nfs_client *clp = data->client;
4226 unsigned long timestamp = data->timestamp;
1da177e4 4227
c6d01c6f 4228 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4229 if (task->tk_status < 0) {
95baa25c 4230 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4231 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4232 return;
4233 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4234 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4235 return;
4236 }
4237 nfs4_schedule_path_down_recovery(clp);
1da177e4 4238 }
452e9352 4239 do_renew_lease(clp, timestamp);
1da177e4
LT		 4240}
4241
963d8fe5
TM		 4242static const struct rpc_call_ops nfs4_renew_ops = {
4243 .rpc_call_done = nfs4_renew_done,
dc96aef9 4244 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4245};
4246
2f60ea6b 4247static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4248{
4249 struct rpc_message msg = {
4250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4251 .rpc_argp = clp,
b4454fe1 4252 .rpc_cred = cred,
1da177e4 4253 };
9bc4e3ca 4254 struct nfs4_renewdata *data;
1da177e4 4255
2f60ea6b
TM		 4256 if (renew_flags == 0)
4257 return 0;
0851de06
AB		 4258 if (!atomic_inc_not_zero(&clp->cl_count))
4259 return -EIO;
b569ad34 4260 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4261 if (data == NULL)
4262 return -ENOMEM;
4263 data->client = clp;
4264 data->timestamp = jiffies;
bc7a05ca 4265 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4266 &nfs4_renew_ops, data);
1da177e4
LT		 4267}
4268
8534d4ec 4269static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4270{
4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4273 .rpc_argp = clp,
b4454fe1 4274 .rpc_cred = cred,
1da177e4
LT		 4275 };
4276 unsigned long now = jiffies;
4277 int status;
4278
bc7a05ca 4279 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4280 if (status < 0)
4281 return status;
452e9352 4282 do_renew_lease(clp, now);
1da177e4
LT		 4283 return 0;
4284}
4285
aa1870af
BF		 4286static inline int nfs4_server_supports_acls(struct nfs_server *server)
4287{
4288 return (server->caps & NFS_CAP_ACLS)
4289 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4290 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4291}
4292
21f498c2
TM		 4293/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4294 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4295 * the stack.
4296 */
21f498c2 4297#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4298
e9e3d724
NH		 4299static int buf_to_pages_noslab(const void *buf, size_t buflen,
4300 struct page **pages, unsigned int *pgbase)
4301{
4302 struct page *newpage, **spages;
4303 int rc = 0;
4304 size_t len;
4305 spages = pages;
4306
4307 do {
21f498c2 4308 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4309 newpage = alloc_page(GFP_KERNEL);
4310
4311 if (newpage == NULL)
4312 goto unwind;
4313 memcpy(page_address(newpage), buf, len);
4314 buf += len;
4315 buflen -= len;
4316 *pages++ = newpage;
4317 rc++;
4318 } while (buflen != 0);
4319
4320 return rc;
4321
4322unwind:
4323 for(; rc > 0; rc--)
4324 __free_page(spages[rc-1]);
4325 return -ENOMEM;
4326}
4327
e50a1c2e
BF		 4328struct nfs4_cached_acl {
4329 int cached;
4330 size_t len;
3e9d4154 4331 char data[0];
e50a1c2e
BF		 4332};
4333
4334static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4335{
4336 struct nfs_inode *nfsi = NFS_I(inode);
4337
4338 spin_lock(&inode->i_lock);
4339 kfree(nfsi->nfs4_acl);
4340 nfsi->nfs4_acl = acl;
4341 spin_unlock(&inode->i_lock);
4342}
4343
4344static void nfs4_zap_acl_attr(struct inode *inode)
4345{
4346 nfs4_set_cached_acl(inode, NULL);
4347}
4348
4349static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4350{
4351 struct nfs_inode *nfsi = NFS_I(inode);
4352 struct nfs4_cached_acl *acl;
4353 int ret = -ENOENT;
4354
4355 spin_lock(&inode->i_lock);
4356 acl = nfsi->nfs4_acl;
4357 if (acl == NULL)
4358 goto out;
4359 if (buf == NULL) /* user is just asking for length */
4360 goto out_len;
4361 if (acl->cached == 0)
4362 goto out;
4363 ret = -ERANGE; /* see getxattr(2) man page */
4364 if (acl->len > buflen)
4365 goto out;
4366 memcpy(buf, acl->data, acl->len);
4367out_len:
4368 ret = acl->len;
4369out:
4370 spin_unlock(&inode->i_lock);
4371 return ret;
4372}
4373
5794d21e 4374static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4375{
4376 struct nfs4_cached_acl *acl;
b291f1b1 4377 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4378
1f1ea6c2 4379 if (buflen <= PAGE_SIZE) {
b291f1b1 4380 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4381 if (acl == NULL)
4382 goto out;
4383 acl->cached = 1;
5794d21e 4384 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4385 } else {
4386 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4387 if (acl == NULL)
4388 goto out;
4389 acl->cached = 0;
4390 }
4391 acl->len = acl_len;
4392out:
4393 nfs4_set_cached_acl(inode, acl);
4394}
4395
bf118a34
AA		 4396/*
4397 * The getxattr API returns the required buffer length when called with a
4398 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4399 * the required buf. On a NULL buf, we send a page of data to the server
4400 * guessing that the ACL request can be serviced by a page. If so, we cache
4401 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4402 * the cache. If not so, we throw away the page, and cache the required
4403 * length. The next getxattr call will then produce another round trip to
4404 * the server, this time with the input buf of the required size.
4405 */
16b4289c 4406static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4407{
bf118a34 4408 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4409 struct nfs_getaclargs args = {
4410 .fh = NFS_FH(inode),
4411 .acl_pages = pages,
4412 .acl_len = buflen,
4413 };
663c79b3
BH		 4414 struct nfs_getaclres res = {
4415 .acl_len = buflen,
4416 };
aa1870af
BF		 4417 struct rpc_message msg = {
4418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4419 .rpc_argp = &args,
663c79b3 4420 .rpc_resp = &res,
aa1870af 4421 };
21f498c2
TM		 4422 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4423 int ret = -ENOMEM, i;
aa1870af 4424
bf118a34
AA		 4425 /* As long as we're doing a round trip to the server anyway,
4426 * let's be prepared for a page of acl data. */
4427 if (npages == 0)
4428 npages = 1;
21f498c2
TM		 4429 if (npages > ARRAY_SIZE(pages))
4430 return -ERANGE;
5a006899 4431
bf118a34
AA		 4432 for (i = 0; i < npages; i++) {
4433 pages[i] = alloc_page(GFP_KERNEL);
4434 if (!pages[i])
4435 goto out_free;
e50a1c2e 4436 }
5a006899
SP		 4437
4438 /* for decoding across pages */
4439 res.acl_scratch = alloc_page(GFP_KERNEL);
4440 if (!res.acl_scratch)
4441 goto out_free;
4442
bf118a34
AA		 4443 args.acl_len = npages * PAGE_SIZE;
4444 args.acl_pgbase = 0;
5a006899 4445
de040bec 4446 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4447 __func__, buf, buflen, npages, args.acl_len);
4448 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4449 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4450 if (ret)
4451 goto out_free;
bf118a34 4452
1f1ea6c2
TM		 4453 /* Handle the case where the passed-in buffer is too short */
4454 if (res.acl_flags & NFS4_ACL_TRUNC) {
4455 /* Did the user only issue a request for the acl length? */
4456 if (buf == NULL)
4457 goto out_ok;
e50a1c2e 4458 ret = -ERANGE;
1f1ea6c2 4459 goto out_free;
e50a1c2e 4460 }
1f1ea6c2 4461 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4462 if (buf) {
4463 if (res.acl_len > buflen) {
4464 ret = -ERANGE;
4465 goto out_free;
4466 }
1f1ea6c2 4467 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4468 }
1f1ea6c2
TM		 4469out_ok:
4470 ret = res.acl_len;
e50a1c2e 4471out_free:
bf118a34
AA		 4472 for (i = 0; i < npages; i++)
4473 if (pages[i])
4474 __free_page(pages[i]);
331818f1
TM		 4475 if (res.acl_scratch)
4476 __free_page(res.acl_scratch);
aa1870af
BF		 4477 return ret;
4478}
4479
16b4289c
TM		 4480static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4481{
4482 struct nfs4_exception exception = { };
4483 ssize_t ret;
4484 do {
4485 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4486 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4487 if (ret >= 0)
4488 break;
4489 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4490 } while (exception.retry);
4491 return ret;
4492}
4493
e50a1c2e
BF		 4494static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4495{
4496 struct nfs_server *server = NFS_SERVER(inode);
4497 int ret;
4498
4499 if (!nfs4_server_supports_acls(server))
4500 return -EOPNOTSUPP;
4501 ret = nfs_revalidate_inode(server, inode);
4502 if (ret < 0)
4503 return ret;
08a22b39
AK		 4504 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4505 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4506 ret = nfs4_read_cached_acl(inode, buf, buflen);
4507 if (ret != -ENOENT)
bf118a34
AA		 4508 /* -ENOENT is returned if there is no ACL or if there is an ACL
4509 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4510 return ret;
4511 return nfs4_get_acl_uncached(inode, buf, buflen);
4512}
4513
16b4289c 4514static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4515{
4516 struct nfs_server *server = NFS_SERVER(inode);
4517 struct page *pages[NFS4ACL_MAXPAGES];
4518 struct nfs_setaclargs arg = {
4519 .fh = NFS_FH(inode),
4520 .acl_pages = pages,
4521 .acl_len = buflen,
4522 };
73c403a9 4523 struct nfs_setaclres res;
4b580ee3
BF		 4524 struct rpc_message msg = {
4525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4526 .rpc_argp = &arg,
73c403a9 4527 .rpc_resp = &res,
4b580ee3 4528 };
21f498c2 4529 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4530 int ret, i;
4b580ee3
BF		 4531
4532 if (!nfs4_server_supports_acls(server))
4533 return -EOPNOTSUPP;
21f498c2
TM		 4534 if (npages > ARRAY_SIZE(pages))
4535 return -ERANGE;
e9e3d724
NH		 4536 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4537 if (i < 0)
4538 return i;
57ec14c5 4539 nfs4_inode_return_delegation(inode);
7c513058 4540 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4541
4542 /*
4543 * Free each page after tx, so the only ref left is
4544 * held by the network stack
4545 */
4546 for (; i > 0; i--)
4547 put_page(pages[i-1]);
4548
08a22b39
AK		 4549 /*
4550 * Acl update can result in inode attribute update.
4551 * so mark the attribute cache invalid.
4552 */
4553 spin_lock(&inode->i_lock);
4554 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4555 spin_unlock(&inode->i_lock);
f41f7418
TM		 4556 nfs_access_zap_cache(inode);
4557 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4558 return ret;
4559}
4560
16b4289c
TM		 4561static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4562{
4563 struct nfs4_exception exception = { };
4564 int err;
4565 do {
c1578b76
TM		 4566 err = __nfs4_proc_set_acl(inode, buf, buflen);
4567 trace_nfs4_set_acl(inode, err);
4568 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4569 &exception);
4570 } while (exception.retry);
4571 return err;
4572}
4573
aa9c2669
DQ		 4574#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4575static int _nfs4_get_security_label(struct inode *inode, void *buf,
4576 size_t buflen)
4577{
4578 struct nfs_server *server = NFS_SERVER(inode);
4579 struct nfs_fattr fattr;
4580 struct nfs4_label label = {0, 0, buflen, buf};
4581
4582 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4583 struct nfs4_getattr_arg args = {
4584 .fh = NFS_FH(inode),
4585 .bitmask = bitmask,
4586 };
4587 struct nfs4_getattr_res res = {
4588 .fattr = &fattr,
4589 .label = &label,
4590 .server = server,
4591 };
4592 struct rpc_message msg = {
4593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4594 .rpc_argp = &args,
4595 .rpc_resp = &res,
4596 };
4597 int ret;
4598
4599 nfs_fattr_init(&fattr);
4600
4601 ret = rpc_call_sync(server->client, &msg, 0);
4602 if (ret)
4603 return ret;
4604 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4605 return -ENOENT;
4606 if (buflen < label.len)
4607 return -ERANGE;
4608 return 0;
4609}
4610
4611static int nfs4_get_security_label(struct inode *inode, void *buf,
4612 size_t buflen)
4613{
4614 struct nfs4_exception exception = { };
4615 int err;
4616
4617 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4618 return -EOPNOTSUPP;
4619
4620 do {
c1578b76
TM		 4621 err = _nfs4_get_security_label(inode, buf, buflen);
4622 trace_nfs4_get_security_label(inode, err);
4623 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4624 &exception);
4625 } while (exception.retry);
4626 return err;
4627}
4628
4629static int _nfs4_do_set_security_label(struct inode *inode,
4630 struct nfs4_label *ilabel,
4631 struct nfs_fattr *fattr,
4632 struct nfs4_label *olabel)
4633{
4634
4635 struct iattr sattr = {0};
4636 struct nfs_server *server = NFS_SERVER(inode);
4637 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4638 struct nfs_setattrargs args = {
4639 .fh = NFS_FH(inode),
4640 .iap = &sattr,
4641 .server = server,
4642 .bitmask = bitmask,
4643 .label = ilabel,
4644 };
4645 struct nfs_setattrres res = {
4646 .fattr = fattr,
4647 .label = olabel,
4648 .server = server,
4649 };
4650 struct rpc_message msg = {
4651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4652 .rpc_argp = &args,
4653 .rpc_resp = &res,
4654 };
4655 int status;
4656
4657 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4658
4659 status = rpc_call_sync(server->client, &msg, 0);
4660 if (status)
4661 dprintk("%s failed: %d\n", __func__, status);
4662
4663 return status;
4664}
4665
4666static int nfs4_do_set_security_label(struct inode *inode,
4667 struct nfs4_label *ilabel,
4668 struct nfs_fattr *fattr,
4669 struct nfs4_label *olabel)
4670{
4671 struct nfs4_exception exception = { };
4672 int err;
4673
4674 do {
c1578b76
TM		 4675 err = _nfs4_do_set_security_label(inode, ilabel,
4676 fattr, olabel);
4677 trace_nfs4_set_security_label(inode, err);
4678 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4679 &exception);
4680 } while (exception.retry);
4681 return err;
4682}
4683
4684static int
4685nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4686{
4687 struct nfs4_label ilabel, *olabel = NULL;
4688 struct nfs_fattr fattr;
4689 struct rpc_cred *cred;
4690 struct inode *inode = dentry->d_inode;
4691 int status;
4692
4693 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4694 return -EOPNOTSUPP;
4695
4696 nfs_fattr_init(&fattr);
4697
4698 ilabel.pi = 0;
4699 ilabel.lfs = 0;
4700 ilabel.label = (char *)buf;
4701 ilabel.len = buflen;
4702
4703 cred = rpc_lookup_cred();
4704 if (IS_ERR(cred))
4705 return PTR_ERR(cred);
4706
4707 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4708 if (IS_ERR(olabel)) {
4709 status = -PTR_ERR(olabel);
4710 goto out;
4711 }
4712
4713 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4714 if (status == 0)
4715 nfs_setsecurity(inode, &fattr, olabel);
4716
4717 nfs4_label_free(olabel);
4718out:
4719 put_rpccred(cred);
4720 return status;
4721}
4722#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4723
4724
1da177e4 4725static int
aa5190d0 4726nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4727{
aa5190d0
TM		 4728 struct nfs_client *clp = server->nfs_client;
4729
4730 if (task->tk_status >= 0)
1da177e4
LT		 4731 return 0;
4732 switch(task->tk_status) {
a1d0b5ee 4733 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4734 case -NFS4ERR_ADMIN_REVOKED:
4735 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4736 if (state == NULL)
4737 break;
4738 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4739 case -NFS4ERR_OPENMODE:
4740 if (state == NULL)
4741 break;
5d422301 4742 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4743 goto recovery_failed;
0400a6b0 4744 goto wait_on_recovery;
0ced63d1 4745 case -NFS4ERR_EXPIRED:
5d422301
TM		 4746 if (state != NULL) {
4747 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4748 goto recovery_failed;
5d422301 4749 }
1da177e4 4750 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4751 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4752 nfs4_schedule_lease_recovery(clp);
4753 goto wait_on_recovery;
519ae255
CL		 4754 case -NFS4ERR_MOVED:
4755 if (nfs4_schedule_migration_recovery(server) < 0)
4756 goto recovery_failed;
4757 goto wait_on_recovery;
4745e315
AA		 4758#if defined(CONFIG_NFS_V4_1)
4759 case -NFS4ERR_BADSESSION:
4760 case -NFS4ERR_BADSLOT:
4761 case -NFS4ERR_BAD_HIGH_SLOT:
4762 case -NFS4ERR_DEADSESSION:
4763 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4764 case -NFS4ERR_SEQ_FALSE_RETRY:
4765 case -NFS4ERR_SEQ_MISORDERED:
4766 dprintk("%s ERROR %d, Reset session\n", __func__,
4767 task->tk_status);
9f594791 4768 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
f1478c13 4769 goto restart_call;
4745e315 4770#endif /* CONFIG_NFS_V4_1 */
1da177e4 4771 case -NFS4ERR_DELAY:
aa5190d0 4772 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4773 case -NFS4ERR_GRACE:
1da177e4 4774 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4775 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4776 case -NFS4ERR_OLD_STATEID:
f1478c13 4777 goto restart_call;
1da177e4
LT		 4778 }
4779 task->tk_status = nfs4_map_errors(task->tk_status);
4780 return 0;
9f51a78e 4781recovery_failed:
5d422301
TM		 4782 task->tk_status = -EIO;
4783 return 0;
0400a6b0 4784wait_on_recovery:
a2c0b9e2 4785 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4786 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4787 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4788 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4789 goto recovery_failed;
f1478c13 4790restart_call:
a2c0b9e2
TM		 4791 task->tk_status = 0;
4792 return -EAGAIN;
1da177e4
LT		 4793}
4794
f092075d
CL		 4795static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4796 nfs4_verifier *bootverf)
cd93710e
CL		 4797{
4798 __be32 verf[2];
4799
2c820d9a
CL		 4800 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4801 /* An impossible timestamp guarantees this value
4802 * will never match a generated boot time. */
4803 verf[0] = 0;
17f26b12 4804 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4805 } else {
f092075d 4806 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4807 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4808 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4809 }
cd93710e
CL		 4810 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4811}
4812
e984a55a
CL		 4813static unsigned int
4814nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4815 char *buf, size_t len)
4816{
4817 unsigned int result;
4818
4819 rcu_read_lock();
4820 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4821 clp->cl_ipaddr,
4822 rpc_peeraddr2str(clp->cl_rpcclient,
4823 RPC_DISPLAY_ADDR),
4824 rpc_peeraddr2str(clp->cl_rpcclient,
4825 RPC_DISPLAY_PROTO));
4826 rcu_read_unlock();
4827 return result;
4828}
4829
4830static unsigned int
4831nfs4_init_uniform_client_string(const struct nfs_client *clp,
4832 char *buf, size_t len)
4833{
55b59293 4834 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4835
4836 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4837 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4838 clp->rpc_ops->version,
4839 clp->cl_minorversion,
4840 nfs4_client_id_uniquifier,
4841 nodename);
e984a55a
CL		 4842 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4843 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4844 nodename);
e984a55a
CL		 4845}
4846
6bbb4ae8
CL		 4847/**
4848 * nfs4_proc_setclientid - Negotiate client ID
4849 * @clp: state data structure
4850 * @program: RPC program for NFSv4 callback service
4851 * @port: IP port number for NFS4 callback service
4852 * @cred: RPC credential to use for this call
4853 * @res: where to place the result
4854 *
4855 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4856 */
bb8b27e5
TM		 4857int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4858 unsigned short port, struct rpc_cred *cred,
4859 struct nfs4_setclientid_res *res)
1da177e4
LT		 4860{
4861 nfs4_verifier sc_verifier;
4862 struct nfs4_setclientid setclientid = {
4863 .sc_verifier = &sc_verifier,
4864 .sc_prog = program,
f4eecd5d 4865 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4866 };
4867 struct rpc_message msg = {
4868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4869 .rpc_argp = &setclientid,
bb8b27e5 4870 .rpc_resp = res,
286d7d6a 4871 .rpc_cred = cred,
1da177e4 4872 };
6bbb4ae8 4873 int status;
1da177e4 4874
de734831 4875 /* nfs_client_id4 */
f092075d 4876 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4877 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4878 setclientid.sc_name_len =
4879 nfs4_init_uniform_client_string(clp,
4880 setclientid.sc_name,
4881 sizeof(setclientid.sc_name));
4882 else
4883 setclientid.sc_name_len =
4884 nfs4_init_nonuniform_client_string(clp,
4885 setclientid.sc_name,
4886 sizeof(setclientid.sc_name));
de734831 4887 /* cb_client4 */
e984a55a 4888 rcu_read_lock();
de734831 4889 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4890 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4891 rpc_peeraddr2str(clp->cl_rpcclient,
4892 RPC_DISPLAY_NETID));
de734831
CL		 4893 rcu_read_unlock();
4894 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4895 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4896 clp->cl_ipaddr, port >> 8, port & 255);
4897
6bbb4ae8
CL		 4898 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4899 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4900 setclientid.sc_name_len, setclientid.sc_name);
4901 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4902 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4903 dprintk("NFS reply setclientid: %d\n", status);
4904 return status;
1da177e4
LT		 4905}
4906
6bbb4ae8
CL		 4907/**
4908 * nfs4_proc_setclientid_confirm - Confirm client ID
4909 * @clp: state data structure
4910 * @res: result of a previous SETCLIENTID
4911 * @cred: RPC credential to use for this call
4912 *
4913 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4914 */
fd954ae1 4915int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4916 struct nfs4_setclientid_res *arg,
4917 struct rpc_cred *cred)
1da177e4 4918{
1da177e4
LT		 4919 struct rpc_message msg = {
4920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4921 .rpc_argp = arg,
286d7d6a 4922 .rpc_cred = cred,
1da177e4 4923 };
1da177e4
LT		 4924 int status;
4925
6bbb4ae8
CL		 4926 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4927 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4928 clp->cl_clientid);
1bd714f2 4929 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4930 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4931 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4932 return status;
4933}
4934
fe650407
TM		 4935struct nfs4_delegreturndata {
4936 struct nfs4_delegreturnargs args;
fa178f29 4937 struct nfs4_delegreturnres res;
fe650407
TM		 4938 struct nfs_fh fh;
4939 nfs4_stateid stateid;
26e976a8 4940 unsigned long timestamp;
fa178f29 4941 struct nfs_fattr fattr;
fe650407
TM		 4942 int rpc_status;
4943};
4944
fe650407
TM		 4945static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4946{
4947 struct nfs4_delegreturndata *data = calldata;
938e1010 4948
14516c3a
TM		 4949 if (!nfs4_sequence_done(task, &data->res.seq_res))
4950 return;
938e1010 4951
ca8acf8d 4952 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4953 switch (task->tk_status) {
4954 case -NFS4ERR_STALE_STATEID:
4955 case -NFS4ERR_EXPIRED:
4956 case 0:
fa178f29 4957 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4958 break;
4959 default:
4960 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4961 -EAGAIN) {
d00c5d43 4962 rpc_restart_call_prepare(task);
79708861
RL		 4963 return;
4964 }
4965 }
4966 data->rpc_status = task->tk_status;
fe650407
TM		 4967}
4968
4969static void nfs4_delegreturn_release(void *calldata)
4970{
fe650407
TM		 4971 kfree(calldata);
4972}
4973
938e1010
AA		 4974static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4975{
4976 struct nfs4_delegreturndata *d_data;
4977
4978 d_data = (struct nfs4_delegreturndata *)data;
4979
d9afbd1b
TM		 4980 nfs4_setup_sequence(d_data->res.server,
4981 &d_data->args.seq_args,
4982 &d_data->res.seq_res,
4983 task);
938e1010 4984}
938e1010 4985
c8d149f3 4986static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4987 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4988 .rpc_call_done = nfs4_delegreturn_done,
4989 .rpc_release = nfs4_delegreturn_release,
4990};
4991
e6f81075 4992static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4993{
4994 struct nfs4_delegreturndata *data;
fa178f29 4995 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4996 struct rpc_task *task;
5138fde0
TM		 4997 struct rpc_message msg = {
4998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4999 .rpc_cred = cred,
5000 };
c970aa85
TM		 5001 struct rpc_task_setup task_setup_data = {
5002 .rpc_client = server->client,
5138fde0 5003 .rpc_message = &msg,
c970aa85
TM		 5004 .callback_ops = &nfs4_delegreturn_ops,
5005 .flags = RPC_TASK_ASYNC,
5006 };
e6f81075 5007 int status = 0;
fe650407 5008
8535b2be 5009 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5010 if (data == NULL)
5011 return -ENOMEM;
a9c92d6b 5012 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5013 data->args.fhandle = &data->fh;
5014 data->args.stateid = &data->stateid;
9e907fec 5015 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5016 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5017 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5018 data->res.fattr = &data->fattr;
5019 data->res.server = server;
5138fde0 5020 nfs_fattr_init(data->res.fattr);
26e976a8 5021 data->timestamp = jiffies;
fe650407
TM		 5022 data->rpc_status = 0;
5023
c970aa85 5024 task_setup_data.callback_data = data;
1174dd1f
TM		 5025 msg.rpc_argp = &data->args;
5026 msg.rpc_resp = &data->res;
c970aa85 5027 task = rpc_run_task(&task_setup_data);
7a1218a2 5028 if (IS_ERR(task))
fe650407 5029 return PTR_ERR(task);
e6f81075
TM		 5030 if (!issync)
5031 goto out;
fe650407 5032 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5033 if (status != 0)
5034 goto out;
5035 status = data->rpc_status;
e144cbcc
TM		 5036 if (status == 0)
5037 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5038 else
5039 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5040out:
e6b3c4db 5041 rpc_put_task(task);
fe650407 5042 return status;
1da177e4
LT		 5043}
5044
e6f81075 5045int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5046{
5047 struct nfs_server *server = NFS_SERVER(inode);
5048 struct nfs4_exception exception = { };
5049 int err;
5050 do {
e6f81075 5051 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5052 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5053 switch (err) {
5054 case -NFS4ERR_STALE_STATEID:
5055 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5056 case 0:
5057 return 0;
5058 }
5059 err = nfs4_handle_exception(server, err, &exception);
5060 } while (exception.retry);
5061 return err;
5062}
5063
5064#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5065#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5066
5067/*
5068 * sleep, with exponential backoff, and retry the LOCK operation.
5069 */
5070static unsigned long
5071nfs4_set_lock_task_retry(unsigned long timeout)
5072{
416ad3c9 5073 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5074 timeout <<= 1;
5075 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5076 return NFS4_LOCK_MAXTIMEOUT;
5077 return timeout;
5078}
5079
1da177e4
LT		 5080static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5081{
5082 struct inode *inode = state->inode;
5083 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5084 struct nfs_client *clp = server->nfs_client;
911d1aaf 5085 struct nfs_lockt_args arg = {
1da177e4 5086 .fh = NFS_FH(inode),
911d1aaf 5087 .fl = request,
1da177e4 5088 };
911d1aaf
TM		 5089 struct nfs_lockt_res res = {
5090 .denied = request,
1da177e4
LT		 5091 };
5092 struct rpc_message msg = {
5093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5094 .rpc_argp = &arg,
5095 .rpc_resp = &res,
5096 .rpc_cred = state->owner->so_cred,
5097 };
1da177e4
LT		 5098 struct nfs4_lock_state *lsp;
5099 int status;
5100
911d1aaf 5101 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5102 status = nfs4_set_lock_state(state, request);
5103 if (status != 0)
5104 goto out;
5105 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5106 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5107 arg.lock_owner.s_dev = server->s_dev;
7c513058 5108 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5109 switch (status) {
5110 case 0:
5111 request->fl_type = F_UNLCK;
5112 break;
5113 case -NFS4ERR_DENIED:
5114 status = 0;
1da177e4 5115 }
70cc6487 5116 request->fl_ops->fl_release_private(request);
a6f951dd 5117 request->fl_ops = NULL;
8d0a8a9d 5118out:
1da177e4
LT		 5119 return status;
5120}
5121
5122static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5123{
5124 struct nfs4_exception exception = { };
5125 int err;
5126
5127 do {
d1b748a5
TM		 5128 err = _nfs4_proc_getlk(state, cmd, request);
5129 trace_nfs4_get_lock(request, state, cmd, err);
5130 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5131 &exception);
5132 } while (exception.retry);
5133 return err;
5134}
5135
5136static int do_vfs_lock(struct file *file, struct file_lock *fl)
5137{
5138 int res = 0;
5139 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5140 case FL_POSIX:
5141 res = posix_lock_file_wait(file, fl);
5142 break;
5143 case FL_FLOCK:
5144 res = flock_lock_file_wait(file, fl);
5145 break;
5146 default:
5147 BUG();
5148 }
1da177e4
LT		 5149 return res;
5150}
5151
faf5f49c 5152struct nfs4_unlockdata {
911d1aaf
TM		 5153 struct nfs_locku_args arg;
5154 struct nfs_locku_res res;
faf5f49c
TM		 5155 struct nfs4_lock_state *lsp;
5156 struct nfs_open_context *ctx;
911d1aaf
TM		 5157 struct file_lock fl;
5158 const struct nfs_server *server;
26e976a8 5159 unsigned long timestamp;
faf5f49c
TM		 5160};
5161
911d1aaf
TM		 5162static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5163 struct nfs_open_context *ctx,
5164 struct nfs4_lock_state *lsp,
5165 struct nfs_seqid *seqid)
5166{
5167 struct nfs4_unlockdata *p;
5168 struct inode *inode = lsp->ls_state->inode;
5169
8535b2be 5170 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5171 if (p == NULL)
5172 return NULL;
5173 p->arg.fh = NFS_FH(inode);
5174 p->arg.fl = &p->fl;
5175 p->arg.seqid = seqid;
c1d51931 5176 p->res.seqid = seqid;
911d1aaf
TM		 5177 p->arg.stateid = &lsp->ls_stateid;
5178 p->lsp = lsp;
5179 atomic_inc(&lsp->ls_count);
5180 /* Ensure we don't close file until we're done freeing locks! */
5181 p->ctx = get_nfs_open_context(ctx);
5182 memcpy(&p->fl, fl, sizeof(p->fl));
5183 p->server = NFS_SERVER(inode);
5184 return p;
5185}
5186
06f814a3 5187static void nfs4_locku_release_calldata(void *data)
faf5f49c 5188{
963d8fe5 5189 struct nfs4_unlockdata *calldata = data;
911d1aaf 5190 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5191 nfs4_put_lock_state(calldata->lsp);
5192 put_nfs_open_context(calldata->ctx);
5193 kfree(calldata);
faf5f49c
TM		 5194}
5195
963d8fe5 5196static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5197{
963d8fe5 5198 struct nfs4_unlockdata *calldata = data;
faf5f49c 5199
14516c3a
TM		 5200 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5201 return;
faf5f49c
TM		 5202 switch (task->tk_status) {
5203 case 0:
f597c537
TM		 5204 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5205 &calldata->res.stateid);
26e976a8 5206 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5207 break;
9e33bed5
TM		 5208 case -NFS4ERR_BAD_STATEID:
5209 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5210 case -NFS4ERR_STALE_STATEID:
5211 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5212 break;
5213 default:
9e33bed5 5214 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5215 rpc_restart_call_prepare(task);
faf5f49c 5216 }
2b1bc308 5217 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5218}
5219
4ce70ada 5220static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5221{
4ce70ada 5222 struct nfs4_unlockdata *calldata = data;
faf5f49c 5223
911d1aaf 5224 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5225 goto out_wait;
795a88c9 5226 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5227 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5228 goto out_no_action;
faf5f49c 5229 }
26e976a8 5230 calldata->timestamp = jiffies;
035168ab 5231 if (nfs4_setup_sequence(calldata->server,
a893693c 5232 &calldata->arg.seq_args,
2240a9e2
TM		 5233 &calldata->res.seq_res,
5234 task) != 0)
5235 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5236 return;
5237out_no_action:
5238 task->tk_action = NULL;
5239out_wait:
5240 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5241}
5242
963d8fe5 5243static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5244 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5245 .rpc_call_done = nfs4_locku_done,
06f814a3 5246 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5247};
5248
a5d16a4d
TM		 5249static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5250 struct nfs_open_context *ctx,
5251 struct nfs4_lock_state *lsp,
5252 struct nfs_seqid *seqid)
5253{
5254 struct nfs4_unlockdata *data;
5138fde0
TM		 5255 struct rpc_message msg = {
5256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5257 .rpc_cred = ctx->cred,
5258 };
c970aa85
TM		 5259 struct rpc_task_setup task_setup_data = {
5260 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5261 .rpc_message = &msg,
c970aa85 5262 .callback_ops = &nfs4_locku_ops,
101070ca 5263 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5264 .flags = RPC_TASK_ASYNC,
5265 };
a5d16a4d 5266
fa940720
WAA		 5267 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5268 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5269
137d6aca
FF		 5270 /* Ensure this is an unlock - when canceling a lock, the
5271 * canceled lock is passed in, and it won't be an unlock.
5272 */
5273 fl->fl_type = F_UNLCK;
5274
a5d16a4d
TM		 5275 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5276 if (data == NULL) {
5277 nfs_free_seqid(seqid);
5278 return ERR_PTR(-ENOMEM);
5279 }
5280
a9c92d6b 5281 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5282 msg.rpc_argp = &data->arg;
5283 msg.rpc_resp = &data->res;
c970aa85
TM		 5284 task_setup_data.callback_data = data;
5285 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5286}
5287
faf5f49c
TM		 5288static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5289{
65b62a29
TM		 5290 struct inode *inode = state->inode;
5291 struct nfs4_state_owner *sp = state->owner;
5292 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5293 struct nfs_seqid *seqid;
1da177e4 5294 struct nfs4_lock_state *lsp;
06f814a3
TM		 5295 struct rpc_task *task;
5296 int status = 0;
536ff0f8 5297 unsigned char fl_flags = request->fl_flags;
faf5f49c 5298
8d0a8a9d 5299 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5300 /* Unlock _before_ we do the RPC call */
5301 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5302 /* Exclude nfs_delegation_claim_locks() */
5303 mutex_lock(&sp->so_delegreturn_mutex);
5304 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5305 down_read(&nfsi->rwsem);
5306 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5307 up_read(&nfsi->rwsem);
65b62a29 5308 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5309 goto out;
19e03c57
TM		 5310 }
5311 up_read(&nfsi->rwsem);
65b62a29 5312 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5313 if (status != 0)
9b073574
TM		 5314 goto out;
5315 /* Is this a delegated lock? */
8d0a8a9d 5316 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5317 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5318 goto out;
8535b2be 5319 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5320 status = -ENOMEM;
911d1aaf 5321 if (seqid == NULL)
9b073574 5322 goto out;
cd3758e3 5323 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5324 status = PTR_ERR(task);
5325 if (IS_ERR(task))
9b073574 5326 goto out;
a5d16a4d 5327 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5328 rpc_put_task(task);
9b073574 5329out:
536ff0f8 5330 request->fl_flags = fl_flags;
d1b748a5 5331 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5332 return status;
5333}
5334
a5d16a4d
TM		 5335struct nfs4_lockdata {
5336 struct nfs_lock_args arg;
5337 struct nfs_lock_res res;
5338 struct nfs4_lock_state *lsp;
5339 struct nfs_open_context *ctx;
5340 struct file_lock fl;
26e976a8 5341 unsigned long timestamp;
a5d16a4d
TM		 5342 int rpc_status;
5343 int cancelled;
66179efe 5344 struct nfs_server *server;
a5d16a4d
TM		 5345};
5346
5347static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5348 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5349 gfp_t gfp_mask)
1da177e4 5350{
a5d16a4d
TM		 5351 struct nfs4_lockdata *p;
5352 struct inode *inode = lsp->ls_state->inode;
1da177e4 5353 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5354
8535b2be 5355 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5356 if (p == NULL)
5357 return NULL;
5358
5359 p->arg.fh = NFS_FH(inode);
5360 p->arg.fl = &p->fl;
8535b2be 5361 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5362 if (p->arg.open_seqid == NULL)
5363 goto out_free;
8535b2be 5364 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5365 if (p->arg.lock_seqid == NULL)
2f74c0a0 5366 goto out_free_seqid;
a5d16a4d 5367 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5368 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5369 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5370 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5371 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5372 p->lsp = lsp;
66179efe 5373 p->server = server;
a5d16a4d
TM		 5374 atomic_inc(&lsp->ls_count);
5375 p->ctx = get_nfs_open_context(ctx);
5376 memcpy(&p->fl, fl, sizeof(p->fl));
5377 return p;
2f74c0a0
TM		 5378out_free_seqid:
5379 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5380out_free:
5381 kfree(p);
5382 return NULL;
5383}
5384
5385static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5386{
5387 struct nfs4_lockdata *data = calldata;
5388 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5389
3110ff80 5390 dprintk("%s: begin!\n", __func__);
2f74c0a0 5391 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5392 goto out_wait;
a5d16a4d
TM		 5393 /* Do we need to do an open_to_lock_owner? */
5394 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5395 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5396 goto out_release_lock_seqid;
8fe72bac 5397 }
8e472f33 5398 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5399 data->arg.new_lock_owner = 1;
c1d51931 5400 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5401 } else
5402 data->arg.new_lock_owner = 0;
5d422301
TM		 5403 if (!nfs4_valid_open_stateid(state)) {
5404 data->rpc_status = -EBADF;
5405 task->tk_action = NULL;
5406 goto out_release_open_seqid;
5407 }
26e976a8 5408 data->timestamp = jiffies;
035168ab
TM		 5409 if (nfs4_setup_sequence(data->server,
5410 &data->arg.seq_args,
2240a9e2 5411 &data->res.seq_res,
d9afbd1b 5412 task) == 0)
66179efe 5413 return;
5d422301 5414out_release_open_seqid:
2240a9e2
TM		 5415 nfs_release_seqid(data->arg.open_seqid);
5416out_release_lock_seqid:
5417 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5418out_wait:
5419 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5420 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5421}
5422
a5d16a4d
TM		 5423static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5424{
5425 struct nfs4_lockdata *data = calldata;
5426
3110ff80 5427 dprintk("%s: begin!\n", __func__);
a5d16a4d 5428
14516c3a
TM		 5429 if (!nfs4_sequence_done(task, &data->res.seq_res))
5430 return;
66179efe 5431
a5d16a4d 5432 data->rpc_status = task->tk_status;
a5d16a4d 5433 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5434 if (data->rpc_status == 0)
5435 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5436 else
5437 goto out;
5438 }
5439 if (data->rpc_status == 0) {
f597c537 5440 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5441 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5442 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5443 }
a5d16a4d 5444out:
3110ff80 5445 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5446}
5447
5448static void nfs4_lock_release(void *calldata)
5449{
5450 struct nfs4_lockdata *data = calldata;
5451
3110ff80 5452 dprintk("%s: begin!\n", __func__);
2f74c0a0 5453 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5454 if (data->cancelled != 0) {
5455 struct rpc_task *task;
5456 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5457 data->arg.lock_seqid);
5458 if (!IS_ERR(task))
bf294b41 5459 rpc_put_task_async(task);
3110ff80 5460 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5461 } else
5462 nfs_free_seqid(data->arg.lock_seqid);
5463 nfs4_put_lock_state(data->lsp);
5464 put_nfs_open_context(data->ctx);
5465 kfree(data);
3110ff80 5466 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5467}
5468
5469static const struct rpc_call_ops nfs4_lock_ops = {
5470 .rpc_call_prepare = nfs4_lock_prepare,
5471 .rpc_call_done = nfs4_lock_done,
5472 .rpc_release = nfs4_lock_release,
5473};
5474
2bee72a6
TM		 5475static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5476{
2bee72a6
TM		 5477 switch (error) {
5478 case -NFS4ERR_ADMIN_REVOKED:
5479 case -NFS4ERR_BAD_STATEID:
ecac799a 5480 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5481 if (new_lock_owner != 0 ||
795a88c9 5482 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5483 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5484 break;
5485 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5486 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5487 case -NFS4ERR_EXPIRED:
5488 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5489 };
5490}
5491
afe6c27c 5492static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5493{
5494 struct nfs4_lockdata *data;
5495 struct rpc_task *task;
5138fde0
TM		 5496 struct rpc_message msg = {
5497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5498 .rpc_cred = state->owner->so_cred,
5499 };
c970aa85
TM		 5500 struct rpc_task_setup task_setup_data = {
5501 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5502 .rpc_message = &msg,
c970aa85 5503 .callback_ops = &nfs4_lock_ops,
101070ca 5504 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5505 .flags = RPC_TASK_ASYNC,
5506 };
a5d16a4d
TM		 5507 int ret;
5508
3110ff80 5509 dprintk("%s: begin!\n", __func__);
cd3758e3 5510 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5511 fl->fl_u.nfs4_fl.owner,
5512 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5513 if (data == NULL)
5514 return -ENOMEM;
5515 if (IS_SETLKW(cmd))
5516 data->arg.block = 1;
a9c92d6b 5517 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5518 msg.rpc_argp = &data->arg;
5519 msg.rpc_resp = &data->res;
c970aa85 5520 task_setup_data.callback_data = data;
8fe72bac
TM		 5521 if (recovery_type > NFS_LOCK_NEW) {
5522 if (recovery_type == NFS_LOCK_RECLAIM)
5523 data->arg.reclaim = NFS_LOCK_RECLAIM;
5524 nfs4_set_sequence_privileged(&data->arg.seq_args);
5525 }
c970aa85 5526 task = rpc_run_task(&task_setup_data);
7a1218a2 5527 if (IS_ERR(task))
a5d16a4d 5528 return PTR_ERR(task);
a5d16a4d
TM		 5529 ret = nfs4_wait_for_completion_rpc_task(task);
5530 if (ret == 0) {
5531 ret = data->rpc_status;
2bee72a6
TM		 5532 if (ret)
5533 nfs4_handle_setlk_error(data->server, data->lsp,
5534 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5535 } else
5536 data->cancelled = 1;
e6b3c4db 5537 rpc_put_task(task);
3110ff80 5538 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5539 return ret;
1da177e4
LT		 5540}
5541
5542static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5543{
202b50dc 5544 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5545 struct nfs4_exception exception = {
5546 .inode = state->inode,
5547 };
202b50dc
TM		 5548 int err;
5549
5550 do {
42a2d13e
TM		 5551 /* Cache the lock if possible... */
5552 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5553 return 0;
afe6c27c 5554 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5555 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5556 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5557 break;
5558 nfs4_handle_exception(server, err, &exception);
5559 } while (exception.retry);
5560 return err;
1da177e4
LT		 5561}
5562
5563static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5564{
202b50dc 5565 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5566 struct nfs4_exception exception = {
5567 .inode = state->inode,
5568 };
202b50dc
TM		 5569 int err;
5570
6bfc93ef
TM		 5571 err = nfs4_set_lock_state(state, request);
5572 if (err != 0)
5573 return err;
f6de7a39 5574 if (!recover_lost_locks) {
ef1820f9
N		 5575 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5576 return 0;
5577 }
202b50dc 5578 do {
42a2d13e
TM		 5579 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5580 return 0;
afe6c27c 5581 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5582 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5583 switch (err) {
5584 default:
5585 goto out;
5586 case -NFS4ERR_GRACE:
5587 case -NFS4ERR_DELAY:
5588 nfs4_handle_exception(server, err, &exception);
5589 err = 0;
5590 }
202b50dc 5591 } while (exception.retry);
a9ed2e25 5592out:
202b50dc 5593 return err;
1da177e4
LT		 5594}
5595
f062eb6c 5596#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5597/**
5598 * nfs41_check_expired_locks - possibly free a lock stateid
5599 *
5600 * @state: NFSv4 state for an inode
5601 *
5602 * Returns NFS_OK if recovery for this stateid is now finished.
5603 * Otherwise a negative NFS4ERR value is returned.
5604 */
b01dd1d8 5605static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5606{
eb64cf96 5607 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5608 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5609 struct nfs_server *server = NFS_SERVER(state->inode);
5610
b01dd1d8 5611 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5612 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5613 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5614
5615 status = nfs41_test_stateid(server,
5616 &lsp->ls_stateid,
5617 cred);
08cb47fa 5618 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5619 if (status != NFS_OK) {
3e60ffdd
CL		 5620 /* Free the stateid unless the server
5621 * informs us the stateid is unrecognized. */
89af2739
CL		 5622 if (status != -NFS4ERR_BAD_STATEID)
5623 nfs41_free_stateid(server,
ab7cb0df
TM		 5624 &lsp->ls_stateid,
5625 cred);
795a88c9 5626 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5627 ret = status;
5628 }
5629 }
5630 };
5631
5632 return ret;
5633}
5634
5635static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5636{
5637 int status = NFS_OK;
5638
5639 if (test_bit(LK_STATE_IN_USE, &state->flags))
5640 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5641 if (status != NFS_OK)
5642 status = nfs4_lock_expired(state, request);
5643 return status;
f062eb6c
BS		 5644}
5645#endif
5646
1da177e4
LT		 5647static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5648{
9a99af49 5649 struct nfs4_state_owner *sp = state->owner;
19e03c57 5650 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5651 unsigned char fl_flags = request->fl_flags;
9a99af49 5652 unsigned int seq;
8e469ebd 5653 int status = -ENOLCK;
1da177e4 5654
8e469ebd
TM		 5655 if ((fl_flags & FL_POSIX) &&
5656 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5657 goto out;
6bfc93ef 5658 /* Is this a delegated open? */
6bfc93ef
TM		 5659 status = nfs4_set_lock_state(state, request);
5660 if (status != 0)
5661 goto out;
01c3b861
TM		 5662 request->fl_flags |= FL_ACCESS;
5663 status = do_vfs_lock(request->fl_file, request);
5664 if (status < 0)
5665 goto out;
19e03c57 5666 down_read(&nfsi->rwsem);
01c3b861 5667 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5668 /* Yes: cache locks! */
01c3b861 5669 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5670 request->fl_flags = fl_flags & ~FL_SLEEP;
5671 status = do_vfs_lock(request->fl_file, request);
5672 goto out_unlock;
01c3b861 5673 }
9a99af49
TM		 5674 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5675 up_read(&nfsi->rwsem);
afe6c27c 5676 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5677 if (status != 0)
9a99af49
TM		 5678 goto out;
5679 down_read(&nfsi->rwsem);
5680 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5681 status = -NFS4ERR_DELAY;
01c3b861 5682 goto out_unlock;
9a99af49 5683 }
6bfc93ef 5684 /* Note: we always want to sleep here! */
01c3b861 5685 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5686 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5687 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5688 "manager!\n", __func__);
01c3b861 5689out_unlock:
19e03c57 5690 up_read(&nfsi->rwsem);
01c3b861
TM		 5691out:
5692 request->fl_flags = fl_flags;
1da177e4
LT		 5693 return status;
5694}
5695
5696static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5697{
a1d0b5ee
TM		 5698 struct nfs4_exception exception = {
5699 .state = state,
05ffe24f 5700 .inode = state->inode,
a1d0b5ee 5701 };
1da177e4
LT		 5702 int err;
5703
5704 do {
965b5d67 5705 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5706 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5707 if (err == -NFS4ERR_DENIED)
5708 err = -EAGAIN;
1da177e4 5709 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5710 err, &exception);
1da177e4
LT		 5711 } while (exception.retry);
5712 return err;
5713}
5714
5715static int
5716nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5717{
5718 struct nfs_open_context *ctx;
5719 struct nfs4_state *state;
5720 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5721 int status;
5722
5723 /* verify open state */
cd3758e3 5724 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5725 state = ctx->state;
5726
5727 if (request->fl_start < 0 || request->fl_end < 0)
5728 return -EINVAL;
5729
d953126a
TM		 5730 if (IS_GETLK(cmd)) {
5731 if (state != NULL)
5732 return nfs4_proc_getlk(state, F_GETLK, request);
5733 return 0;
5734 }
1da177e4
LT		 5735
5736 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5737 return -EINVAL;
5738
d953126a
TM		 5739 if (request->fl_type == F_UNLCK) {
5740 if (state != NULL)
5741 return nfs4_proc_unlck(state, cmd, request);
5742 return 0;
5743 }
1da177e4 5744
d953126a
TM		 5745 if (state == NULL)
5746 return -ENOLCK;
55725513
TM		 5747 /*
5748 * Don't rely on the VFS having checked the file open mode,
5749 * since it won't do this for flock() locks.
5750 */
f44106e2 5751 switch (request->fl_type) {
55725513
TM		 5752 case F_RDLCK:
5753 if (!(filp->f_mode & FMODE_READ))
5754 return -EBADF;
5755 break;
5756 case F_WRLCK:
5757 if (!(filp->f_mode & FMODE_WRITE))
5758 return -EBADF;
5759 }
5760
1da177e4
LT		 5761 do {
5762 status = nfs4_proc_setlk(state, cmd, request);
5763 if ((status != -EAGAIN) || IS_SETLK(cmd))
5764 break;
5765 timeout = nfs4_set_lock_task_retry(timeout);
5766 status = -ERESTARTSYS;
5767 if (signalled())
5768 break;
5769 } while(status < 0);
1da177e4
LT		 5770 return status;
5771}
5772
db4f2e63 5773int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5774{
5775 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5776 int err;
5777
5778 err = nfs4_set_lock_state(state, fl);
5779 if (err != 0)
db4f2e63 5780 return err;
4a706fa0 5781 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5782 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5783}
6b3b5496 5784
cf470c3e
TM		 5785struct nfs_release_lockowner_data {
5786 struct nfs4_lock_state *lsp;
5ae67c4f 5787 struct nfs_server *server;
cf470c3e 5788 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5789 struct nfs4_sequence_args seq_args;
5790 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5791};
5792
fbd4bfd1
CL		 5793static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5794{
5795 struct nfs_release_lockowner_data *data = calldata;
5796 nfs40_setup_sequence(data->server,
5797 &data->seq_args, &data->seq_res, task);
5798}
5799
5800static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5801{
5802 struct nfs_release_lockowner_data *data = calldata;
5803 nfs40_sequence_done(task, &data->seq_res);
5804}
5805
d3c7b7cc
TM		 5806static void nfs4_release_lockowner_release(void *calldata)
5807{
cf470c3e 5808 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5809 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5810 kfree(calldata);
5811}
5812
17280175 5813static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5814 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5815 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5816 .rpc_release = nfs4_release_lockowner_release,
5817};
5818
c8b2d0bf 5819static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5820{
cf470c3e 5821 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5822 struct rpc_message msg = {
5823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5824 };
5825
5826 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5827 return -EINVAL;
fbd4bfd1 5828
cf470c3e
TM		 5829 data = kmalloc(sizeof(*data), GFP_NOFS);
5830 if (!data)
5831 return -ENOMEM;
fbd4bfd1 5832 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5833 data->lsp = lsp;
5ae67c4f 5834 data->server = server;
cf470c3e
TM		 5835 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5836 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5837 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5838
cf470c3e
TM		 5839 msg.rpc_argp = &data->args;
5840 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5841 return 0;
d3c7b7cc
TM		 5842}
5843
aa1870af
BF		 5844#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5845
64c2ce8b
AK		 5846static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5847 const void *buf, size_t buflen,
5848 int flags, int type)
6b3b5496 5849{
64c2ce8b
AK		 5850 if (strcmp(key, "") != 0)
5851 return -EINVAL;
4b580ee3 5852
64c2ce8b 5853 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5854}
5855
64c2ce8b
AK		 5856static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5857 void *buf, size_t buflen, int type)
6b3b5496 5858{
64c2ce8b
AK		 5859 if (strcmp(key, "") != 0)
5860 return -EINVAL;
aa1870af 5861
64c2ce8b 5862 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5863}
5864
64c2ce8b
AK		 5865static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5866 size_t list_len, const char *name,
5867 size_t name_len, int type)
6b3b5496 5868{
64c2ce8b 5869 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5870
096455a2
BF		 5871 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5872 return 0;
64c2ce8b
AK		 5873
5874 if (list && len <= list_len)
5875 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5876 return len;
6b3b5496
BF		 5877}
5878
c9bccef6
DQ		 5879#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5880static inline int nfs4_server_supports_labels(struct nfs_server *server)
5881{
5882 return server->caps & NFS_CAP_SECURITY_LABEL;
5883}
5884
5885static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5886 const void *buf, size_t buflen,
5887 int flags, int type)
5888{
5889 if (security_ismaclabel(key))
5890 return nfs4_set_security_label(dentry, buf, buflen);
5891
5892 return -EOPNOTSUPP;
5893}
5894
5895static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5896 void *buf, size_t buflen, int type)
5897{
5898 if (security_ismaclabel(key))
5899 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5900 return -EOPNOTSUPP;
5901}
5902
5903static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5904 size_t list_len, const char *name,
5905 size_t name_len, int type)
5906{
5907 size_t len = 0;
5908
5909 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5910 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5911 if (list && len <= list_len)
5912 security_inode_listsecurity(dentry->d_inode, list, len);
5913 }
5914 return len;
5915}
5916
5917static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5918 .prefix = XATTR_SECURITY_PREFIX,
5919 .list = nfs4_xattr_list_nfs4_label,
5920 .get = nfs4_xattr_get_nfs4_label,
5921 .set = nfs4_xattr_set_nfs4_label,
5922};
5923#endif
5924
5925
533eb461
AA		 5926/*
5927 * nfs_fhget will use either the mounted_on_fileid or the fileid
5928 */
69aaaae1
TM		 5929static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5930{
533eb461
AA		 5931 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5932 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5933 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5934 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5935 return;
5936
5937 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5938 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5939 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5940 fattr->nlink = 2;
5941}
5942
f05d147f
BS		 5943static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5944 const struct qstr *name,
5945 struct nfs4_fs_locations *fs_locations,
5946 struct page *page)
683b57b4
TM		 5947{
5948 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5949 u32 bitmask[3] = {
361e624f 5950 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5951 };
5952 struct nfs4_fs_locations_arg args = {
5953 .dir_fh = NFS_FH(dir),
c228fd3a 5954 .name = name,
683b57b4
TM		 5955 .page = page,
5956 .bitmask = bitmask,
5957 };
22958463
BH		 5958 struct nfs4_fs_locations_res res = {
5959 .fs_locations = fs_locations,
5960 };
683b57b4
TM		 5961 struct rpc_message msg = {
5962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5963 .rpc_argp = &args,
22958463 5964 .rpc_resp = &res,
683b57b4
TM		 5965 };
5966 int status;
5967
3110ff80 5968 dprintk("%s: start\n", __func__);
533eb461
AA		 5969
5970 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5971 * is not supported */
5972 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5973 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5974 else
5975 bitmask[0] |= FATTR4_WORD0_FILEID;
5976
c228fd3a 5977 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5978 fs_locations->server = server;
830b8e33 5979 fs_locations->nlocations = 0;
f05d147f 5980 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5981 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5982 return status;
5983}
5984
f05d147f
BS		 5985int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5986 const struct qstr *name,
5987 struct nfs4_fs_locations *fs_locations,
5988 struct page *page)
db0a9593
BS		 5989{
5990 struct nfs4_exception exception = { };
5991 int err;
5992 do {
078ea3df
TM		 5993 err = _nfs4_proc_fs_locations(client, dir, name,
5994 fs_locations, page);
5995 trace_nfs4_get_fs_locations(dir, name, err);
5996 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5997 &exception);
5998 } while (exception.retry);
5999 return err;
6000}
6001
b03d735b
CL		 6002/*
6003 * This operation also signals the server that this client is
6004 * performing migration recovery. The server can stop returning
6005 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6006 * appended to this compound to identify the client ID which is
6007 * performing recovery.
6008 */
6009static int _nfs40_proc_get_locations(struct inode *inode,
6010 struct nfs4_fs_locations *locations,
6011 struct page *page, struct rpc_cred *cred)
6012{
6013 struct nfs_server *server = NFS_SERVER(inode);
6014 struct rpc_clnt *clnt = server->client;
6015 u32 bitmask[2] = {
6016 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6017 };
6018 struct nfs4_fs_locations_arg args = {
6019 .clientid = server->nfs_client->cl_clientid,
6020 .fh = NFS_FH(inode),
6021 .page = page,
6022 .bitmask = bitmask,
6023 .migration = 1, /* skip LOOKUP */
6024 .renew = 1, /* append RENEW */
6025 };
6026 struct nfs4_fs_locations_res res = {
6027 .fs_locations = locations,
6028 .migration = 1,
6029 .renew = 1,
6030 };
6031 struct rpc_message msg = {
6032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6033 .rpc_argp = &args,
6034 .rpc_resp = &res,
6035 .rpc_cred = cred,
6036 };
6037 unsigned long now = jiffies;
6038 int status;
6039
6040 nfs_fattr_init(&locations->fattr);
6041 locations->server = server;
6042 locations->nlocations = 0;
6043
6044 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6045 nfs4_set_sequence_privileged(&args.seq_args);
6046 status = nfs4_call_sync_sequence(clnt, server, &msg,
6047 &args.seq_args, &res.seq_res);
6048 if (status)
6049 return status;
6050
6051 renew_lease(server, now);
6052 return 0;
6053}
6054
6055#ifdef CONFIG_NFS_V4_1
6056
6057/*
6058 * This operation also signals the server that this client is
6059 * performing migration recovery. The server can stop asserting
6060 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6061 * performing this operation is identified in the SEQUENCE
6062 * operation in this compound.
6063 *
6064 * When the client supports GETATTR(fs_locations_info), it can
6065 * be plumbed in here.
6066 */
6067static int _nfs41_proc_get_locations(struct inode *inode,
6068 struct nfs4_fs_locations *locations,
6069 struct page *page, struct rpc_cred *cred)
6070{
6071 struct nfs_server *server = NFS_SERVER(inode);
6072 struct rpc_clnt *clnt = server->client;
6073 u32 bitmask[2] = {
6074 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6075 };
6076 struct nfs4_fs_locations_arg args = {
6077 .fh = NFS_FH(inode),
6078 .page = page,
6079 .bitmask = bitmask,
6080 .migration = 1, /* skip LOOKUP */
6081 };
6082 struct nfs4_fs_locations_res res = {
6083 .fs_locations = locations,
6084 .migration = 1,
6085 };
6086 struct rpc_message msg = {
6087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6088 .rpc_argp = &args,
6089 .rpc_resp = &res,
6090 .rpc_cred = cred,
6091 };
6092 int status;
6093
6094 nfs_fattr_init(&locations->fattr);
6095 locations->server = server;
6096 locations->nlocations = 0;
6097
6098 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6099 nfs4_set_sequence_privileged(&args.seq_args);
6100 status = nfs4_call_sync_sequence(clnt, server, &msg,
6101 &args.seq_args, &res.seq_res);
6102 if (status == NFS4_OK &&
6103 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6104 status = -NFS4ERR_LEASE_MOVED;
6105 return status;
6106}
6107
6108#endif /* CONFIG_NFS_V4_1 */
6109
6110/**
6111 * nfs4_proc_get_locations - discover locations for a migrated FSID
6112 * @inode: inode on FSID that is migrating
6113 * @locations: result of query
6114 * @page: buffer
6115 * @cred: credential to use for this operation
6116 *
6117 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6118 * operation failed, or a negative errno if a local error occurred.
6119 *
6120 * On success, "locations" is filled in, but if the server has
6121 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6122 * asserted.
6123 *
6124 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6125 * from this client that require migration recovery.
6126 */
6127int nfs4_proc_get_locations(struct inode *inode,
6128 struct nfs4_fs_locations *locations,
6129 struct page *page, struct rpc_cred *cred)
6130{
6131 struct nfs_server *server = NFS_SERVER(inode);
6132 struct nfs_client *clp = server->nfs_client;
6133 const struct nfs4_mig_recovery_ops *ops =
6134 clp->cl_mvops->mig_recovery_ops;
6135 struct nfs4_exception exception = { };
6136 int status;
6137
6138 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6139 (unsigned long long)server->fsid.major,
6140 (unsigned long long)server->fsid.minor,
6141 clp->cl_hostname);
6142 nfs_display_fhandle(NFS_FH(inode), __func__);
6143
6144 do {
6145 status = ops->get_locations(inode, locations, page, cred);
6146 if (status != -NFS4ERR_DELAY)
6147 break;
6148 nfs4_handle_exception(server, status, &exception);
6149 } while (exception.retry);
6150 return status;
6151}
6152
5ec16a85 6153/**
a5250def
WAA		 6154 * If 'use_integrity' is true and the state managment nfs_client
6155 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6156 * and the machine credential as per RFC3530bis and RFC5661 Security
6157 * Considerations sections. Otherwise, just use the user cred with the
6158 * filesystem's rpc_client.
5ec16a85 6159 */
a5250def 6160static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6161{
6162 int status;
6163 struct nfs4_secinfo_arg args = {
6164 .dir_fh = NFS_FH(dir),
6165 .name = name,
6166 };
6167 struct nfs4_secinfo_res res = {
6168 .flavors = flavors,
6169 };
6170 struct rpc_message msg = {
6171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6172 .rpc_argp = &args,
6173 .rpc_resp = &res,
6174 };
a5250def 6175 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6176 struct rpc_cred *cred = NULL;
a5250def
WAA		 6177
6178 if (use_integrity) {
6179 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6180 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6181 msg.rpc_cred = cred;
a5250def 6182 }
5a5ea0d4
BS		 6183
6184 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6185
6186 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6187 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6188
a5250def
WAA		 6189 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6190 &res.seq_res, 0);
5a5ea0d4 6191 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6192
7cb852df
WAA		 6193 if (cred)
6194 put_rpccred(cred);
a5250def 6195
5a5ea0d4
BS		 6196 return status;
6197}
6198
72de53ec
BS		 6199int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6200 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6201{
6202 struct nfs4_exception exception = { };
6203 int err;
6204 do {
a5250def
WAA		 6205 err = -NFS4ERR_WRONGSEC;
6206
6207 /* try to use integrity protection with machine cred */
6208 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6209 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6210
6211 /*
6212 * if unable to use integrity protection, or SECINFO with
6213 * integrity protection returns NFS4ERR_WRONGSEC (which is
6214 * disallowed by spec, but exists in deployed servers) use
6215 * the current filesystem's rpc_client and the user cred.
6216 */
6217 if (err == -NFS4ERR_WRONGSEC)
6218 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6219
078ea3df
TM		 6220 trace_nfs4_secinfo(dir, name, err);
6221 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6222 &exception);
6223 } while (exception.retry);
6224 return err;
6225}
6226
557134a3 6227#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6228/*
6229 * Check the exchange flags returned by the server for invalid flags, having
6230 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6231 * DS flags set.
6232 */
6233static int nfs4_check_cl_exchange_flags(u32 flags)
6234{
6235 if (flags & ~EXCHGID4_FLAG_MASK_R)
6236 goto out_inval;
6237 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6238 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6239 goto out_inval;
6240 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6241 goto out_inval;
6242 return NFS_OK;
6243out_inval:
6244 return -NFS4ERR_INVAL;
6245}
6246
78fe0f41 6247static bool
79d4e1f0
CL		 6248nfs41_same_server_scope(struct nfs41_server_scope *a,
6249 struct nfs41_server_scope *b)
78fe0f41
WAA		 6250{
6251 if (a->server_scope_sz == b->server_scope_sz &&
6252 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6253 return true;
6254
6255 return false;
6256}
6257
7c44f1ae
WAA		 6258/*
6259 * nfs4_proc_bind_conn_to_session()
6260 *
6261 * The 4.1 client currently uses the same TCP connection for the
6262 * fore and backchannel.
6263 */
2cf047c9 6264int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6265{
6266 int status;
6267 struct nfs41_bind_conn_to_session_res res;
6268 struct rpc_message msg = {
6269 .rpc_proc =
6270 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6271 .rpc_argp = clp,
6272 .rpc_resp = &res,
2cf047c9 6273 .rpc_cred = cred,
7c44f1ae
WAA		 6274 };
6275
6276 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6277
6278 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6279 if (unlikely(res.session == NULL)) {
6280 status = -ENOMEM;
6281 goto out;
6282 }
6283
6284 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6285 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6286 if (status == 0) {
6287 if (memcmp(res.session->sess_id.data,
6288 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6289 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6290 status = -EIO;
6291 goto out_session;
6292 }
6293 if (res.dir != NFS4_CDFS4_BOTH) {
6294 dprintk("NFS: %s: Unexpected direction from server\n",
6295 __func__);
6296 status = -EIO;
6297 goto out_session;
6298 }
6299 if (res.use_conn_in_rdma_mode) {
6300 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6301 __func__);
6302 status = -EIO;
6303 goto out_session;
6304 }
6305 }
6306out_session:
6307 kfree(res.session);
6308out:
6309 dprintk("<-- %s status= %d\n", __func__, status);
6310 return status;
6311}
6312
99fe60d0 6313/*
fa940720
WAA		 6314 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6315 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6316 */
6317static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6318 .how = SP4_MACH_CRED,
6319 .enforce.u.words = {
6320 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6321 1 << (OP_EXCHANGE_ID - 32) |
6322 1 << (OP_CREATE_SESSION - 32) |
6323 1 << (OP_DESTROY_SESSION - 32) |
6324 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6325 },
6326 .allow.u.words = {
6327 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6328 1 << (OP_LOCKU) |
6329 1 << (OP_COMMIT),
8b5bee2e 6330 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6331 1 << (OP_SECINFO_NO_NAME - 32) |
6332 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6333 1 << (OP_FREE_STATEID - 32) |
6334 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6335 }
6336};
6337
6338/*
6339 * Select the state protection mode for client `clp' given the server results
6340 * from exchange_id in `sp'.
99fe60d0 6341 *
2031cd1a
WAA		 6342 * Returns 0 on success, negative errno otherwise.
6343 */
6344static int nfs4_sp4_select_mode(struct nfs_client *clp,
6345 struct nfs41_state_protection *sp)
6346{
6347 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6348 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6349 1 << (OP_EXCHANGE_ID - 32) |
6350 1 << (OP_CREATE_SESSION - 32) |
6351 1 << (OP_DESTROY_SESSION - 32) |
6352 1 << (OP_DESTROY_CLIENTID - 32)
6353 };
6354 unsigned int i;
6355
6356 if (sp->how == SP4_MACH_CRED) {
6357 /* Print state protect result */
6358 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6359 for (i = 0; i <= LAST_NFS4_OP; i++) {
6360 if (test_bit(i, sp->enforce.u.longs))
6361 dfprintk(MOUNT, " enforce op %d\n", i);
6362 if (test_bit(i, sp->allow.u.longs))
6363 dfprintk(MOUNT, " allow op %d\n", i);
6364 }
6365
6366 /* make sure nothing is on enforce list that isn't supported */
6367 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6368 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6369 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6370 return -EINVAL;
6371 }
6372 }
6373
6374 /*
6375 * Minimal mode - state operations are allowed to use machine
6376 * credential. Note this already happens by default, so the
6377 * client doesn't have to do anything more than the negotiation.
6378 *
6379 * NOTE: we don't care if EXCHANGE_ID is in the list -
6380 * we're already using the machine cred for exchange_id
6381 * and will never use a different cred.
6382 */
6383 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6384 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6385 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6386 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6387 dfprintk(MOUNT, "sp4_mach_cred:\n");
6388 dfprintk(MOUNT, " minimal mode enabled\n");
6389 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6390 } else {
6391 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6392 return -EINVAL;
6393 }
fa940720
WAA		 6394
6395 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6396 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6397 dfprintk(MOUNT, " cleanup mode enabled\n");
6398 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6399 }
8b5bee2e
WAA		 6400
6401 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6402 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6403 dfprintk(MOUNT, " secinfo mode enabled\n");
6404 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6405 }
3787d506
WAA		 6406
6407 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6408 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6409 dfprintk(MOUNT, " stateid mode enabled\n");
6410 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6411 }
8c21c62c
WAA		 6412
6413 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6414 dfprintk(MOUNT, " write mode enabled\n");
6415 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6416 }
6417
6418 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6419 dfprintk(MOUNT, " commit mode enabled\n");
6420 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6421 }
2031cd1a
WAA		 6422 }
6423
6424 return 0;
6425}
6426
6427/*
6428 * _nfs4_proc_exchange_id()
6bbb4ae8 6429 *
2031cd1a 6430 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6431 */
2031cd1a
WAA		 6432static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6433 u32 sp4_how)
99fe60d0
BH		 6434{
6435 nfs4_verifier verifier;
6436 struct nfs41_exchange_id_args args = {
cd93710e 6437 .verifier = &verifier,
99fe60d0 6438 .client = clp,
4f0b429d
TM		 6439 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6440 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6441 };
6442 struct nfs41_exchange_id_res res = {
32b01310 6443 0
99fe60d0
BH		 6444 };
6445 int status;
6446 struct rpc_message msg = {
6447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6448 .rpc_argp = &args,
6449 .rpc_resp = &res,
6450 .rpc_cred = cred,
6451 };
99fe60d0 6452
f092075d 6453 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6454 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6455 sizeof(args.id));
6bbb4ae8
CL		 6456 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6457 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6458 args.id_len, args.id);
99fe60d0 6459
acdeb69d 6460 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6461 GFP_NOFS);
acdeb69d 6462 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6463 status = -ENOMEM;
6464 goto out;
6465 }
78fe0f41 6466
79d4e1f0 6467 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6468 GFP_NOFS);
177313f1 6469 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6470 status = -ENOMEM;
acdeb69d 6471 goto out_server_owner;
abe9a6d5 6472 }
78fe0f41 6473
bbafffd2 6474 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6475 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6476 status = -ENOMEM;
6477 goto out_server_scope;
6478 }
6479
2031cd1a
WAA		 6480 switch (sp4_how) {
6481 case SP4_NONE:
6482 args.state_protect.how = SP4_NONE;
6483 break;
6484
6485 case SP4_MACH_CRED:
6486 args.state_protect = nfs4_sp4_mach_cred_request;
6487 break;
6488
6489 default:
6490 /* unsupported! */
6491 WARN_ON_ONCE(1);
6492 status = -EINVAL;
6493 goto out_server_scope;
6494 }
6495
1bd714f2 6496 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6497 trace_nfs4_exchange_id(clp, status);
177313f1 6498 if (status == 0)
32b01310 6499 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6500
2031cd1a
WAA		 6501 if (status == 0)
6502 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6503
acdeb69d 6504 if (status == 0) {
32b01310
TM		 6505 clp->cl_clientid = res.clientid;
6506 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6507 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6508 clp->cl_seqid = res.seqid;
6509
acdeb69d
CL		 6510 kfree(clp->cl_serverowner);
6511 clp->cl_serverowner = res.server_owner;
6512 res.server_owner = NULL;
78fe0f41 6513
7d2ed9ac 6514 /* use the most recent implementation id */
59155546
CL		 6515 kfree(clp->cl_implid);
6516 clp->cl_implid = res.impl_id;
7d2ed9ac 6517
177313f1 6518 if (clp->cl_serverscope != NULL &&
79d4e1f0 6519 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6520 res.server_scope)) {
6521 dprintk("%s: server_scope mismatch detected\n",
6522 __func__);
6523 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6524 kfree(clp->cl_serverscope);
6525 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6526 }
6527
177313f1 6528 if (clp->cl_serverscope == NULL) {
79d4e1f0 6529 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6530 goto out;
6531 }
32b01310
TM		 6532 } else
6533 kfree(res.impl_id);
7d2ed9ac 6534
acdeb69d
CL		 6535out_server_owner:
6536 kfree(res.server_owner);
7d2ed9ac 6537out_server_scope:
abe9a6d5
WAA		 6538 kfree(res.server_scope);
6539out:
177313f1 6540 if (clp->cl_implid != NULL)
6bbb4ae8 6541 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6542 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6543 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6544 clp->cl_implid->date.seconds,
6545 clp->cl_implid->date.nseconds);
6bbb4ae8 6546 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6547 return status;
6548}
6549
2031cd1a
WAA		 6550/*
6551 * nfs4_proc_exchange_id()
6552 *
6553 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6554 *
6555 * Since the clientid has expired, all compounds using sessions
6556 * associated with the stale clientid will be returning
6557 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6558 * be in some phase of session reset.
6559 *
6560 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6561 */
6562int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6563{
6564 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6565 int status;
6566
6567 /* try SP4_MACH_CRED if krb5i/p */
6568 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6569 authflavor == RPC_AUTH_GSS_KRB5P) {
6570 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6571 if (!status)
6572 return 0;
6573 }
6574
6575 /* try SP4_NONE */
6576 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6577}
6578
66245539
TM		 6579static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6580 struct rpc_cred *cred)
6581{
6582 struct rpc_message msg = {
6583 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6584 .rpc_argp = clp,
6585 .rpc_cred = cred,
6586 };
6587 int status;
6588
6589 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6590 trace_nfs4_destroy_clientid(clp, status);
66245539 6591 if (status)
02c67525 6592 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6593 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6594 return status;
6595}
6596
6597static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6598 struct rpc_cred *cred)
6599{
6600 unsigned int loop;
6601 int ret;
6602
6603 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6604 ret = _nfs4_proc_destroy_clientid(clp, cred);
6605 switch (ret) {
6606 case -NFS4ERR_DELAY:
6607 case -NFS4ERR_CLIENTID_BUSY:
6608 ssleep(1);
6609 break;
6610 default:
6611 return ret;
6612 }
6613 }
6614 return 0;
6615}
6616
6617int nfs4_destroy_clientid(struct nfs_client *clp)
6618{
6619 struct rpc_cred *cred;
6620 int ret = 0;
6621
6622 if (clp->cl_mvops->minor_version < 1)
6623 goto out;
6624 if (clp->cl_exchange_flags == 0)
6625 goto out;
05f4c350
CL		 6626 if (clp->cl_preserve_clid)
6627 goto out;
73d8bde5 6628 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6629 ret = nfs4_proc_destroy_clientid(clp, cred);
6630 if (cred)
6631 put_rpccred(cred);
6632 switch (ret) {
6633 case 0:
6634 case -NFS4ERR_STALE_CLIENTID:
6635 clp->cl_exchange_flags = 0;
6636 }
6637out:
6638 return ret;
6639}
6640
2050f0cc
AA		 6641struct nfs4_get_lease_time_data {
6642 struct nfs4_get_lease_time_args *args;
6643 struct nfs4_get_lease_time_res *res;
6644 struct nfs_client *clp;
6645};
6646
6647static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6648 void *calldata)
6649{
2050f0cc
AA		 6650 struct nfs4_get_lease_time_data *data =
6651 (struct nfs4_get_lease_time_data *)calldata;
6652
6653 dprintk("--> %s\n", __func__);
6654 /* just setup sequence, do not trigger session recovery
6655 since we're invoked within one */
d9afbd1b
TM		 6656 nfs41_setup_sequence(data->clp->cl_session,
6657 &data->args->la_seq_args,
6658 &data->res->lr_seq_res,
6659 task);
2050f0cc
AA		 6660 dprintk("<-- %s\n", __func__);
6661}
6662
6663/*
6664 * Called from nfs4_state_manager thread for session setup, so don't recover
6665 * from sequence operation or clientid errors.
6666 */
6667static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6668{
6669 struct nfs4_get_lease_time_data *data =
6670 (struct nfs4_get_lease_time_data *)calldata;
6671
6672 dprintk("--> %s\n", __func__);
14516c3a
TM		 6673 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6674 return;
2050f0cc
AA		 6675 switch (task->tk_status) {
6676 case -NFS4ERR_DELAY:
6677 case -NFS4ERR_GRACE:
6678 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6679 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6680 task->tk_status = 0;
a8a4ae3a
AA		 6681 /* fall through */
6682 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6683 rpc_restart_call_prepare(task);
2050f0cc
AA		 6684 return;
6685 }
2050f0cc
AA		 6686 dprintk("<-- %s\n", __func__);
6687}
6688
17280175 6689static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6690 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6691 .rpc_call_done = nfs4_get_lease_time_done,
6692};
6693
6694int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6695{
6696 struct rpc_task *task;
6697 struct nfs4_get_lease_time_args args;
6698 struct nfs4_get_lease_time_res res = {
6699 .lr_fsinfo = fsinfo,
6700 };
6701 struct nfs4_get_lease_time_data data = {
6702 .args = &args,
6703 .res = &res,
6704 .clp = clp,
6705 };
6706 struct rpc_message msg = {
6707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6708 .rpc_argp = &args,
6709 .rpc_resp = &res,
6710 };
6711 struct rpc_task_setup task_setup = {
6712 .rpc_client = clp->cl_rpcclient,
6713 .rpc_message = &msg,
6714 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6715 .callback_data = &data,
6716 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6717 };
6718 int status;
6719
a9c92d6b 6720 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6721 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6722 dprintk("--> %s\n", __func__);
6723 task = rpc_run_task(&task_setup);
6724
6725 if (IS_ERR(task))
6726 status = PTR_ERR(task);
6727 else {
6728 status = task->tk_status;
6729 rpc_put_task(task);
6730 }
6731 dprintk("<-- %s return %d\n", __func__, status);
6732
6733 return status;
6734}
6735
fc931582
AA		 6736/*
6737 * Initialize the values to be used by the client in CREATE_SESSION
6738 * If nfs4_init_session set the fore channel request and response sizes,
6739 * use them.
6740 *
6741 * Set the back channel max_resp_sz_cached to zero to force the client to
6742 * always set csa_cachethis to FALSE because the current implementation
6743 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6744 */
6745static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6746{
18aad3d5
AA		 6747 unsigned int max_rqst_sz, max_resp_sz;
6748
6749 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6750 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6751
fc931582 6752 /* Fore channel attributes */
18aad3d5
AA		 6753 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6754 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6755 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6756 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6757
6758 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6759 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6760 __func__,
6761 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6762 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6763
6764 /* Back channel attributes */
fc931582
AA		 6765 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6766 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6767 args->bc_attrs.max_resp_sz_cached = 0;
6768 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6769 args->bc_attrs.max_reqs = 1;
6770
6771 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6772 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6773 __func__,
6774 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6775 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6776 args->bc_attrs.max_reqs);
6777}
6778
43c2e885 6779static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6780{
43c2e885
BF		 6781 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6782 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6783
43c2e885
BF		 6784 if (rcvd->max_resp_sz > sent->max_resp_sz)
6785 return -EINVAL;
6786 /*
6787 * Our requested max_ops is the minimum we need; we're not
6788 * prepared to break up compounds into smaller pieces than that.
6789 * So, no point even trying to continue if the server won't
6790 * cooperate:
6791 */
6792 if (rcvd->max_ops < sent->max_ops)
6793 return -EINVAL;
6794 if (rcvd->max_reqs == 0)
6795 return -EINVAL;
b4b9a0c1
VG		 6796 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6797 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6798 return 0;
8d35301d
AA		 6799}
6800
43c2e885
BF		 6801static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6802{
6803 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6804 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6805
43c2e885
BF		 6806 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6807 return -EINVAL;
6808 if (rcvd->max_resp_sz < sent->max_resp_sz)
6809 return -EINVAL;
6810 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6811 return -EINVAL;
6812 /* These would render the backchannel useless: */
b4b9a0c1 6813 if (rcvd->max_ops != sent->max_ops)
43c2e885 6814 return -EINVAL;
b4b9a0c1 6815 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6816 return -EINVAL;
6817 return 0;
6818}
8d35301d 6819
8d35301d
AA		 6820static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6821 struct nfs4_session *session)
6822{
43c2e885 6823 int ret;
8d35301d 6824
43c2e885
BF		 6825 ret = nfs4_verify_fore_channel_attrs(args, session);
6826 if (ret)
6827 return ret;
6828 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6829}
6830
848f5bda
TM		 6831static int _nfs4_proc_create_session(struct nfs_client *clp,
6832 struct rpc_cred *cred)
fc931582
AA		 6833{
6834 struct nfs4_session *session = clp->cl_session;
6835 struct nfs41_create_session_args args = {
6836 .client = clp,
6837 .cb_program = NFS4_CALLBACK,
6838 };
6839 struct nfs41_create_session_res res = {
6840 .client = clp,
6841 };
6842 struct rpc_message msg = {
6843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6844 .rpc_argp = &args,
6845 .rpc_resp = &res,
848f5bda 6846 .rpc_cred = cred,
fc931582
AA		 6847 };
6848 int status;
6849
6850 nfs4_init_channel_attrs(&args);
0f91421e 6851 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6852
1bd714f2 6853 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6854 trace_nfs4_create_session(clp, status);
fc931582 6855
43095d39 6856 if (!status) {
8d35301d
AA		 6857 /* Verify the session's negotiated channel_attrs values */
6858 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6859 /* Increment the clientid slot sequence id */
6860 clp->cl_seqid++;
6861 }
6862
6863 return status;
6864}
6865
6866/*
6867 * Issues a CREATE_SESSION operation to the server.
6868 * It is the responsibility of the caller to verify the session is
6869 * expired before calling this routine.
6870 */
848f5bda 6871int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6872{
6873 int status;
6874 unsigned *ptr;
fc931582
AA		 6875 struct nfs4_session *session = clp->cl_session;
6876
6877 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6878
848f5bda 6879 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6880 if (status)
6881 goto out;
6882
aacd5537
AA		 6883 /* Init or reset the session slot tables */
6884 status = nfs4_setup_session_slot_tables(session);
6885 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6886 if (status)
6887 goto out;
6888
6889 ptr = (unsigned *)&session->sess_id.data[0];
6890 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6891 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6892out:
6893 dprintk("<-- %s\n", __func__);
6894 return status;
6895}
6896
0f3e66c6
AA		 6897/*
6898 * Issue the over-the-wire RPC DESTROY_SESSION.
6899 * The caller must serialize access to this routine.
6900 */
848f5bda
TM		 6901int nfs4_proc_destroy_session(struct nfs4_session *session,
6902 struct rpc_cred *cred)
0f3e66c6 6903{
848f5bda
TM		 6904 struct rpc_message msg = {
6905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6906 .rpc_argp = session,
6907 .rpc_cred = cred,
6908 };
0f3e66c6 6909 int status = 0;
0f3e66c6
AA		 6910
6911 dprintk("--> nfs4_proc_destroy_session\n");
6912
6913 /* session is still being setup */
6914 if (session->clp->cl_cons_state != NFS_CS_READY)
6915 return status;
6916
1bd714f2 6917 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6918 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6919
6920 if (status)
08106ac7 6921 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6922 "Session has been destroyed regardless...\n", status);
6923
6924 dprintk("<-- nfs4_proc_destroy_session\n");
6925 return status;
6926}
6927
fc01cea9
AA		 6928/*
6929 * Renew the cl_session lease.
6930 */
d5f8d3fe
TM		 6931struct nfs4_sequence_data {
6932 struct nfs_client *clp;
6933 struct nfs4_sequence_args args;
6934 struct nfs4_sequence_res res;
6935};
6936
dc96aef9
AB		 6937static void nfs41_sequence_release(void *data)
6938{
d5f8d3fe
TM		 6939 struct nfs4_sequence_data *calldata = data;
6940 struct nfs_client *clp = calldata->clp;
dc96aef9 6941
7135840f
AB		 6942 if (atomic_read(&clp->cl_count) > 1)
6943 nfs4_schedule_state_renewal(clp);
6944 nfs_put_client(clp);
d5f8d3fe 6945 kfree(calldata);
dc96aef9
AB		 6946}
6947
aa5190d0
TM		 6948static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6949{
6950 switch(task->tk_status) {
6951 case -NFS4ERR_DELAY:
aa5190d0
TM		 6952 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6953 return -EAGAIN;
6954 default:
0400a6b0 6955 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6956 }
6957 return 0;
6958}
6959
dc96aef9 6960static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6961{
d5f8d3fe
TM		 6962 struct nfs4_sequence_data *calldata = data;
6963 struct nfs_client *clp = calldata->clp;
fc01cea9 6964
14516c3a
TM		 6965 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6966 return;
fc01cea9 6967
c6d01c6f 6968 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6969 if (task->tk_status < 0) {
6970 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6971 if (atomic_read(&clp->cl_count) == 1)
6972 goto out;
fc01cea9 6973
aa5190d0
TM		 6974 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6975 rpc_restart_call_prepare(task);
fc01cea9
AA		 6976 return;
6977 }
6978 }
fc01cea9 6979 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6980out:
fc01cea9
AA		 6981 dprintk("<-- %s\n", __func__);
6982}
6983
6984static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6985{
d5f8d3fe
TM		 6986 struct nfs4_sequence_data *calldata = data;
6987 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6988 struct nfs4_sequence_args *args;
6989 struct nfs4_sequence_res *res;
6990
fc01cea9
AA		 6991 args = task->tk_msg.rpc_argp;
6992 res = task->tk_msg.rpc_resp;
6993
d9afbd1b 6994 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6995}
6996
6997static const struct rpc_call_ops nfs41_sequence_ops = {
6998 .rpc_call_done = nfs41_sequence_call_done,
6999 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7000 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7001};
7002
8fe72bac
TM		 7003static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7004 struct rpc_cred *cred,
7005 bool is_privileged)
fc01cea9 7006{
d5f8d3fe 7007 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7008 struct rpc_message msg = {
7009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7010 .rpc_cred = cred,
7011 };
71ac6da9
TM		 7012 struct rpc_task_setup task_setup_data = {
7013 .rpc_client = clp->cl_rpcclient,
7014 .rpc_message = &msg,
8fe72bac 7015 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7016 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7017 };
fc01cea9 7018
7135840f 7019 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7020 return ERR_PTR(-EIO);
dfb4f309 7021 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7022 if (calldata == NULL) {
7135840f 7023 nfs_put_client(clp);
71ac6da9 7024 return ERR_PTR(-ENOMEM);
fc01cea9 7025 }
a9c92d6b 7026 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7027 if (is_privileged)
7028 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7029 msg.rpc_argp = &calldata->args;
7030 msg.rpc_resp = &calldata->res;
7031 calldata->clp = clp;
71ac6da9 7032 task_setup_data.callback_data = calldata;
fc01cea9 7033
71ac6da9
TM		 7034 return rpc_run_task(&task_setup_data);
7035}
7036
2f60ea6b 7037static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7038{
7039 struct rpc_task *task;
7040 int ret = 0;
7041
2f60ea6b
TM		 7042 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7043 return 0;
8fe72bac 7044 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7045 if (IS_ERR(task))
7046 ret = PTR_ERR(task);
7047 else
bf294b41 7048 rpc_put_task_async(task);
71ac6da9
TM		 7049 dprintk("<-- %s status=%d\n", __func__, ret);
7050 return ret;
7051}
7052
7053static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7054{
7055 struct rpc_task *task;
7056 int ret;
7057
8fe72bac 7058 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7059 if (IS_ERR(task)) {
7060 ret = PTR_ERR(task);
7061 goto out;
7062 }
7063 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7064 if (!ret) {
7065 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7066
7067 if (task->tk_status == 0)
7068 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7069 ret = task->tk_status;
b4410c2f 7070 }
71ac6da9
TM		 7071 rpc_put_task(task);
7072out:
7073 dprintk("<-- %s status=%d\n", __func__, ret);
7074 return ret;
fc01cea9
AA		 7075}
7076
fce5c838
RL		 7077struct nfs4_reclaim_complete_data {
7078 struct nfs_client *clp;
7079 struct nfs41_reclaim_complete_args arg;
7080 struct nfs41_reclaim_complete_res res;
7081};
7082
7083static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7084{
7085 struct nfs4_reclaim_complete_data *calldata = data;
7086
d9afbd1b
TM		 7087 nfs41_setup_sequence(calldata->clp->cl_session,
7088 &calldata->arg.seq_args,
7089 &calldata->res.seq_res,
7090 task);
fce5c838
RL		 7091}
7092
aa5190d0
TM		 7093static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7094{
7095 switch(task->tk_status) {
7096 case 0:
7097 case -NFS4ERR_COMPLETE_ALREADY:
7098 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7099 break;
7100 case -NFS4ERR_DELAY:
aa5190d0 7101 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7102 /* fall through */
7103 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7104 return -EAGAIN;
7105 default:
0400a6b0 7106 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7107 }
7108 return 0;
7109}
7110
fce5c838
RL		 7111static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7112{
7113 struct nfs4_reclaim_complete_data *calldata = data;
7114 struct nfs_client *clp = calldata->clp;
7115 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7116
7117 dprintk("--> %s\n", __func__);
14516c3a
TM		 7118 if (!nfs41_sequence_done(task, res))
7119 return;
fce5c838 7120
c6d01c6f 7121 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7122 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7123 rpc_restart_call_prepare(task);
7124 return;
7125 }
fce5c838
RL		 7126 dprintk("<-- %s\n", __func__);
7127}
7128
7129static void nfs4_free_reclaim_complete_data(void *data)
7130{
7131 struct nfs4_reclaim_complete_data *calldata = data;
7132
7133 kfree(calldata);
7134}
7135
7136static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7137 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7138 .rpc_call_done = nfs4_reclaim_complete_done,
7139 .rpc_release = nfs4_free_reclaim_complete_data,
7140};
7141
7142/*
7143 * Issue a global reclaim complete.
7144 */
965e9c23
TM		 7145static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7146 struct rpc_cred *cred)
fce5c838
RL		 7147{
7148 struct nfs4_reclaim_complete_data *calldata;
7149 struct rpc_task *task;
7150 struct rpc_message msg = {
7151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7152 .rpc_cred = cred,
fce5c838
RL		 7153 };
7154 struct rpc_task_setup task_setup_data = {
7155 .rpc_client = clp->cl_rpcclient,
7156 .rpc_message = &msg,
7157 .callback_ops = &nfs4_reclaim_complete_call_ops,
7158 .flags = RPC_TASK_ASYNC,
7159 };
7160 int status = -ENOMEM;
7161
7162 dprintk("--> %s\n", __func__);
8535b2be 7163 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7164 if (calldata == NULL)
7165 goto out;
7166 calldata->clp = clp;
7167 calldata->arg.one_fs = 0;
fce5c838 7168
a9c92d6b 7169 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7170 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7171 msg.rpc_argp = &calldata->arg;
7172 msg.rpc_resp = &calldata->res;
7173 task_setup_data.callback_data = calldata;
7174 task = rpc_run_task(&task_setup_data);
acf82b85 7175 if (IS_ERR(task)) {
fce5c838 7176 status = PTR_ERR(task);
acf82b85
DC		 7177 goto out;
7178 }
c34c32ea
AA		 7179 status = nfs4_wait_for_completion_rpc_task(task);
7180 if (status == 0)
7181 status = task->tk_status;
fce5c838 7182 rpc_put_task(task);
acf82b85 7183 return 0;
fce5c838
RL		 7184out:
7185 dprintk("<-- %s status=%d\n", __func__, status);
7186 return status;
7187}
b1f69b75
AA		 7188
7189static void
7190nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7191{
7192 struct nfs4_layoutget *lgp = calldata;
c31663d4 7193 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7194 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7195
7196 dprintk("--> %s\n", __func__);
c31663d4
FI		 7197 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7198 * right now covering the LAYOUTGET we are about to send.
7199 * However, that is not so catastrophic, and there seems
7200 * to be no way to prevent it completely.
7201 */
6ba7db34 7202 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7203 &lgp->res.seq_res, task))
b1f69b75 7204 return;
cf7d63f1
FI		 7205 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7206 NFS_I(lgp->args.inode)->layout,
7207 lgp->args.ctx->state)) {
7208 rpc_exit(task, NFS4_OK);
cf7d63f1 7209 }
b1f69b75
AA		 7210}
7211
7212static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7213{
7214 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7215 struct inode *inode = lgp->args.inode;
7216 struct nfs_server *server = NFS_SERVER(inode);
7217 struct pnfs_layout_hdr *lo;
7218 struct nfs4_state *state = NULL;
30005121 7219 unsigned long timeo, giveup;
b1f69b75
AA		 7220
7221 dprintk("--> %s\n", __func__);
7222
6ba7db34 7223 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7224 goto out;
b1f69b75
AA		 7225
7226 switch (task->tk_status) {
7227 case 0:
ee314c2a 7228 goto out;
b1f69b75
AA		 7229 case -NFS4ERR_LAYOUTTRYLATER:
7230 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7231 timeo = rpc_get_timeout(task->tk_client);
7232 giveup = lgp->args.timestamp + timeo;
7233 if (time_after(giveup, jiffies))
7234 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7235 break;
7236 case -NFS4ERR_EXPIRED:
7237 case -NFS4ERR_BAD_STATEID:
7238 spin_lock(&inode->i_lock);
7239 lo = NFS_I(inode)->layout;
7240 if (!lo || list_empty(&lo->plh_segs)) {
7241 spin_unlock(&inode->i_lock);
7242 /* If the open stateid was bad, then recover it. */
7243 state = lgp->args.ctx->state;
7244 } else {
7245 LIST_HEAD(head);
7246
7247 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7248 spin_unlock(&inode->i_lock);
7249 /* Mark the bad layout state as invalid, then
7250 * retry using the open stateid. */
7251 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7252 }
7253 }
ee314c2a
TM		 7254 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7255 rpc_restart_call_prepare(task);
7256out:
b1f69b75
AA		 7257 dprintk("<-- %s\n", __func__);
7258}
7259
8554116e
IK		 7260static size_t max_response_pages(struct nfs_server *server)
7261{
7262 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7263 return nfs_page_array_len(0, max_resp_sz);
7264}
7265
7266static void nfs4_free_pages(struct page **pages, size_t size)
7267{
7268 int i;
7269
7270 if (!pages)
7271 return;
7272
7273 for (i = 0; i < size; i++) {
7274 if (!pages[i])
7275 break;
7276 __free_page(pages[i]);
7277 }
7278 kfree(pages);
7279}
7280
7281static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7282{
7283 struct page **pages;
7284 int i;
7285
7286 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7287 if (!pages) {
7288 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7289 return NULL;
7290 }
7291
7292 for (i = 0; i < size; i++) {
7293 pages[i] = alloc_page(gfp_flags);
7294 if (!pages[i]) {
7295 dprintk("%s: failed to allocate page\n", __func__);
7296 nfs4_free_pages(pages, size);
7297 return NULL;
7298 }
7299 }
7300
7301 return pages;
7302}
7303
b1f69b75
AA		 7304static void nfs4_layoutget_release(void *calldata)
7305{
7306 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7307 struct inode *inode = lgp->args.inode;
7308 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7309 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7310
7311 dprintk("--> %s\n", __func__);
8554116e 7312 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7313 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7314 put_nfs_open_context(lgp->args.ctx);
7315 kfree(calldata);
7316 dprintk("<-- %s\n", __func__);
7317}
7318
7319static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7320 .rpc_call_prepare = nfs4_layoutget_prepare,
7321 .rpc_call_done = nfs4_layoutget_done,
7322 .rpc_release = nfs4_layoutget_release,
7323};
7324
a0b0a6e3
TM		 7325struct pnfs_layout_segment *
7326nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7327{
a47970ff
WAA		 7328 struct inode *inode = lgp->args.inode;
7329 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7330 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7331 struct rpc_task *task;
7332 struct rpc_message msg = {
7333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7334 .rpc_argp = &lgp->args,
7335 .rpc_resp = &lgp->res,
6ab59344 7336 .rpc_cred = lgp->cred,
b1f69b75
AA		 7337 };
7338 struct rpc_task_setup task_setup_data = {
7339 .rpc_client = server->client,
7340 .rpc_message = &msg,
7341 .callback_ops = &nfs4_layoutget_call_ops,
7342 .callback_data = lgp,
7343 .flags = RPC_TASK_ASYNC,
7344 };
a0b0a6e3 7345 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7346 int status = 0;
7347
7348 dprintk("--> %s\n", __func__);
7349
8554116e
IK		 7350 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7351 if (!lgp->args.layout.pages) {
7352 nfs4_layoutget_release(lgp);
a0b0a6e3 7353 return ERR_PTR(-ENOMEM);
8554116e
IK		 7354 }
7355 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7356 lgp->args.timestamp = jiffies;
8554116e 7357
35124a09 7358 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7359 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7360 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7361
7362 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7363 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7364
b1f69b75
AA		 7365 task = rpc_run_task(&task_setup_data);
7366 if (IS_ERR(task))
a0b0a6e3 7367 return ERR_CAST(task);
b1f69b75 7368 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7369 if (status == 0)
7370 status = task->tk_status;
1037e6ea
TM		 7371 trace_nfs4_layoutget(lgp->args.ctx,
7372 &lgp->args.range,
7373 &lgp->res.range,
7374 status);
085b7a45
WAA		 7375 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7376 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7377 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7378 rpc_put_task(task);
7379 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7380 if (status)
7381 return ERR_PTR(status);
7382 return lseg;
b1f69b75
AA		 7383}
7384
cbe82603
BH		 7385static void
7386nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7387{
7388 struct nfs4_layoutreturn *lrp = calldata;
7389
7390 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7391 nfs41_setup_sequence(lrp->clp->cl_session,
7392 &lrp->args.seq_args,
7393 &lrp->res.seq_res,
7394 task);
cbe82603
BH		 7395}
7396
7397static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7398{
7399 struct nfs4_layoutreturn *lrp = calldata;
7400 struct nfs_server *server;
7401
7402 dprintk("--> %s\n", __func__);
7403
6ba7db34 7404 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7405 return;
7406
7407 server = NFS_SERVER(lrp->args.inode);
7408 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7409 rpc_restart_call_prepare(task);
cbe82603
BH		 7410 return;
7411 }
cbe82603
BH		 7412 dprintk("<-- %s\n", __func__);
7413}
7414
7415static void nfs4_layoutreturn_release(void *calldata)
7416{
7417 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7418 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7419
7420 dprintk("--> %s\n", __func__);
849b286f
TM		 7421 spin_lock(&lo->plh_inode->i_lock);
7422 if (lrp->res.lrs_present)
7423 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7424 lo->plh_block_lgets--;
7425 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7426 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7427 kfree(calldata);
7428 dprintk("<-- %s\n", __func__);
7429}
7430
7431static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7432 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7433 .rpc_call_done = nfs4_layoutreturn_done,
7434 .rpc_release = nfs4_layoutreturn_release,
7435};
7436
7437int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7438{
7439 struct rpc_task *task;
7440 struct rpc_message msg = {
7441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7442 .rpc_argp = &lrp->args,
7443 .rpc_resp = &lrp->res,
9556000d 7444 .rpc_cred = lrp->cred,
cbe82603
BH		 7445 };
7446 struct rpc_task_setup task_setup_data = {
1771c577 7447 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7448 .rpc_message = &msg,
7449 .callback_ops = &nfs4_layoutreturn_call_ops,
7450 .callback_data = lrp,
7451 };
7452 int status;
7453
7454 dprintk("--> %s\n", __func__);
a9c92d6b 7455 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7456 task = rpc_run_task(&task_setup_data);
7457 if (IS_ERR(task))
7458 return PTR_ERR(task);
7459 status = task->tk_status;
1037e6ea 7460 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7461 dprintk("<-- %s status=%d\n", __func__, status);
7462 rpc_put_task(task);
7463 return status;
7464}
7465
7f11d8d3
AA		 7466/*
7467 * Retrieve the list of Data Server devices from the MDS.
7468 */
7469static int _nfs4_getdevicelist(struct nfs_server *server,
7470 const struct nfs_fh *fh,
7471 struct pnfs_devicelist *devlist)
7472{
7473 struct nfs4_getdevicelist_args args = {
7474 .fh = fh,
7475 .layoutclass = server->pnfs_curr_ld->id,
7476 };
7477 struct nfs4_getdevicelist_res res = {
7478 .devlist = devlist,
7479 };
7480 struct rpc_message msg = {
7481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7482 .rpc_argp = &args,
7483 .rpc_resp = &res,
7484 };
7485 int status;
7486
7487 dprintk("--> %s\n", __func__);
7488 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7489 &res.seq_res, 0);
7490 dprintk("<-- %s status=%d\n", __func__, status);
7491 return status;
7492}
7493
7494int nfs4_proc_getdevicelist(struct nfs_server *server,
7495 const struct nfs_fh *fh,
7496 struct pnfs_devicelist *devlist)
7497{
7498 struct nfs4_exception exception = { };
7499 int err;
7500
7501 do {
7502 err = nfs4_handle_exception(server,
7503 _nfs4_getdevicelist(server, fh, devlist),
7504 &exception);
7505 } while (exception.retry);
7506
7507 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7508 err, devlist->num_devs);
7509
7510 return err;
7511}
7512EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7513
b1f69b75 7514static int
cd5875fe
TM		 7515_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7516 struct pnfs_device *pdev,
7517 struct rpc_cred *cred)
b1f69b75
AA		 7518{
7519 struct nfs4_getdeviceinfo_args args = {
7520 .pdev = pdev,
7521 };
7522 struct nfs4_getdeviceinfo_res res = {
7523 .pdev = pdev,
7524 };
7525 struct rpc_message msg = {
7526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7527 .rpc_argp = &args,
7528 .rpc_resp = &res,
cd5875fe 7529 .rpc_cred = cred,
b1f69b75
AA		 7530 };
7531 int status;
7532
7533 dprintk("--> %s\n", __func__);
7c513058 7534 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7535 dprintk("<-- %s status=%d\n", __func__, status);
7536
7537 return status;
7538}
7539
cd5875fe
TM		 7540int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7541 struct pnfs_device *pdev,
7542 struct rpc_cred *cred)
b1f69b75
AA		 7543{
7544 struct nfs4_exception exception = { };
7545 int err;
7546
7547 do {
7548 err = nfs4_handle_exception(server,
cd5875fe 7549 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7550 &exception);
7551 } while (exception.retry);
7552 return err;
7553}
7554EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7555
863a3c6c
AA		 7556static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7557{
7558 struct nfs4_layoutcommit_data *data = calldata;
7559 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7560 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7561
d9afbd1b
TM		 7562 nfs41_setup_sequence(session,
7563 &data->args.seq_args,
7564 &data->res.seq_res,
7565 task);
863a3c6c
AA		 7566}
7567
7568static void
7569nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7570{
7571 struct nfs4_layoutcommit_data *data = calldata;
7572 struct nfs_server *server = NFS_SERVER(data->args.inode);
7573
6ba7db34 7574 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7575 return;
7576
7577 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7578 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7579 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7580 case -NFS4ERR_BADLAYOUT: /* no layout */
7581 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7582 task->tk_status = 0;
e59d27e0
TM		 7583 break;
7584 case 0:
863a3c6c
AA		 7585 nfs_post_op_update_inode_force_wcc(data->args.inode,
7586 data->res.fattr);
e59d27e0
TM		 7587 break;
7588 default:
7589 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7590 rpc_restart_call_prepare(task);
7591 return;
7592 }
7593 }
863a3c6c
AA		 7594}
7595
7596static void nfs4_layoutcommit_release(void *calldata)
7597{
7598 struct nfs4_layoutcommit_data *data = calldata;
7599
db29c089 7600 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7601 put_rpccred(data->cred);
7602 kfree(data);
7603}
7604
7605static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7606 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7607 .rpc_call_done = nfs4_layoutcommit_done,
7608 .rpc_release = nfs4_layoutcommit_release,
7609};
7610
7611int
ef311537 7612nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7613{
7614 struct rpc_message msg = {
7615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7616 .rpc_argp = &data->args,
7617 .rpc_resp = &data->res,
7618 .rpc_cred = data->cred,
7619 };
7620 struct rpc_task_setup task_setup_data = {
7621 .task = &data->task,
7622 .rpc_client = NFS_CLIENT(data->args.inode),
7623 .rpc_message = &msg,
7624 .callback_ops = &nfs4_layoutcommit_ops,
7625 .callback_data = data,
7626 .flags = RPC_TASK_ASYNC,
7627 };
7628 struct rpc_task *task;
7629 int status = 0;
7630
7631 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7632 "lbw: %llu inode %lu\n",
7633 data->task.tk_pid, sync,
7634 data->args.lastbytewritten,
7635 data->args.inode->i_ino);
7636
a9c92d6b 7637 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7638 task = rpc_run_task(&task_setup_data);
7639 if (IS_ERR(task))
7640 return PTR_ERR(task);
ef311537 7641 if (sync == false)
863a3c6c
AA		 7642 goto out;
7643 status = nfs4_wait_for_completion_rpc_task(task);
7644 if (status != 0)
7645 goto out;
7646 status = task->tk_status;
1037e6ea 7647 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7648out:
7649 dprintk("%s: status %d\n", __func__, status);
7650 rpc_put_task(task);
7651 return status;
7652}
fca78d6d 7653
97431204
AA		 7654/**
7655 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7656 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7657 */
fca78d6d
BS		 7658static int
7659_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7660 struct nfs_fsinfo *info,
7661 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7662{
7663 struct nfs41_secinfo_no_name_args args = {
7664 .style = SECINFO_STYLE_CURRENT_FH,
7665 };
7666 struct nfs4_secinfo_res res = {
7667 .flavors = flavors,
7668 };
7669 struct rpc_message msg = {
7670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7671 .rpc_argp = &args,
7672 .rpc_resp = &res,
7673 };
b1b3e136 7674 struct rpc_clnt *clnt = server->client;
7cb852df 7675 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7676 int status;
7677
7678 if (use_integrity) {
7679 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7680 cred = nfs4_get_clid_cred(server->nfs_client);
7681 msg.rpc_cred = cred;
b1b3e136
WAA		 7682 }
7683
7684 dprintk("--> %s\n", __func__);
7685 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7686 &res.seq_res, 0);
7687 dprintk("<-- %s status=%d\n", __func__, status);
7688
7cb852df
WAA		 7689 if (cred)
7690 put_rpccred(cred);
b1b3e136
WAA		 7691
7692 return status;
fca78d6d
BS		 7693}
7694
7695static int
7696nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7697 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7698{
7699 struct nfs4_exception exception = { };
7700 int err;
7701 do {
b1b3e136
WAA		 7702 /* first try using integrity protection */
7703 err = -NFS4ERR_WRONGSEC;
7704
7705 /* try to use integrity protection with machine cred */
7706 if (_nfs4_is_integrity_protected(server->nfs_client))
7707 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7708 flavors, true);
7709
7710 /*
7711 * if unable to use integrity protection, or SECINFO with
7712 * integrity protection returns NFS4ERR_WRONGSEC (which is
7713 * disallowed by spec, but exists in deployed servers) use
7714 * the current filesystem's rpc_client and the user cred.
7715 */
7716 if (err == -NFS4ERR_WRONGSEC)
7717 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7718 flavors, false);
7719
fca78d6d
BS		 7720 switch (err) {
7721 case 0:
7722 case -NFS4ERR_WRONGSEC:
7723 case -NFS4ERR_NOTSUPP:
05e9cfb4 7724 goto out;
fca78d6d
BS		 7725 default:
7726 err = nfs4_handle_exception(server, err, &exception);
7727 }
7728 } while (exception.retry);
05e9cfb4 7729out:
fca78d6d
BS		 7730 return err;
7731}
7732
7733static int
7734nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7735 struct nfs_fsinfo *info)
7736{
7737 int err;
7738 struct page *page;
367156d9 7739 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7740 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7741 struct nfs4_secinfo4 *secinfo;
7742 int i;
fca78d6d
BS		 7743
7744 page = alloc_page(GFP_KERNEL);
7745 if (!page) {
7746 err = -ENOMEM;
7747 goto out;
7748 }
7749
7750 flavors = page_address(page);
7751 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7752
7753 /*
7754 * Fall back on "guess and check" method if
7755 * the server doesn't support SECINFO_NO_NAME
7756 */
7757 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7758 err = nfs4_find_root_sec(server, fhandle, info);
7759 goto out_freepage;
7760 }
7761 if (err)
7762 goto out_freepage;
7763
58a8cf12
WAA		 7764 for (i = 0; i < flavors->num_flavors; i++) {
7765 secinfo = &flavors->flavors[i];
7766
7767 switch (secinfo->flavor) {
7768 case RPC_AUTH_NULL:
7769 case RPC_AUTH_UNIX:
7770 case RPC_AUTH_GSS:
7771 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7772 &secinfo->flavor_info);
7773 break;
7774 default:
7775 flavor = RPC_AUTH_MAXFLAVOR;
7776 break;
7777 }
7778
7779 if (flavor != RPC_AUTH_MAXFLAVOR) {
7780 err = nfs4_lookup_root_sec(server, fhandle,
7781 info, flavor);
7782 if (!err)
7783 break;
7784 }
7785 }
7786
7787 if (flavor == RPC_AUTH_MAXFLAVOR)
7788 err = -EPERM;
fca78d6d
BS		 7789
7790out_freepage:
7791 put_page(page);
7792 if (err == -EACCES)
7793 return -EPERM;
7794out:
7795 return err;
7796}
1cab0652 7797
ab7cb0df
TM		 7798static int _nfs41_test_stateid(struct nfs_server *server,
7799 nfs4_stateid *stateid,
7800 struct rpc_cred *cred)
7d974794
BS		 7801{
7802 int status;
7803 struct nfs41_test_stateid_args args = {
1cab0652 7804 .stateid = stateid,
7d974794
BS		 7805 };
7806 struct nfs41_test_stateid_res res;
7807 struct rpc_message msg = {
7808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7809 .rpc_argp = &args,
7810 .rpc_resp = &res,
ab7cb0df 7811 .rpc_cred = cred,
7d974794 7812 };
3787d506
WAA		 7813 struct rpc_clnt *rpc_client = server->client;
7814
7815 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7816 &rpc_client, &msg);
1cab0652 7817
38527b15 7818 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7819 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7820 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7821 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7822 &args.seq_args, &res.seq_res);
38527b15
CL		 7823 if (status != NFS_OK) {
7824 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7825 return status;
38527b15
CL		 7826 }
7827 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7828 return -res.status;
7d974794
BS		 7829}
7830
38527b15
CL		 7831/**
7832 * nfs41_test_stateid - perform a TEST_STATEID operation
7833 *
7834 * @server: server / transport on which to perform the operation
7835 * @stateid: state ID to test
ab7cb0df 7836 * @cred: credential
38527b15
CL		 7837 *
7838 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7839 * Otherwise a negative NFS4ERR value is returned if the operation
7840 * failed or the state ID is not currently valid.
7841 */
ab7cb0df
TM		 7842static int nfs41_test_stateid(struct nfs_server *server,
7843 nfs4_stateid *stateid,
7844 struct rpc_cred *cred)
7d974794
BS		 7845{
7846 struct nfs4_exception exception = { };
7847 int err;
7848 do {
ab7cb0df 7849 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7850 if (err != -NFS4ERR_DELAY)
7851 break;
7852 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7853 } while (exception.retry);
7854 return err;
7855}
9aeda35f 7856
7c1d5fae
TM		 7857struct nfs_free_stateid_data {
7858 struct nfs_server *server;
7859 struct nfs41_free_stateid_args args;
9aeda35f 7860 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7861};
7862
7863static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7864{
7865 struct nfs_free_stateid_data *data = calldata;
7866 nfs41_setup_sequence(nfs4_get_session(data->server),
7867 &data->args.seq_args,
7868 &data->res.seq_res,
7869 task);
7870}
7871
7872static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7873{
7874 struct nfs_free_stateid_data *data = calldata;
7875
7876 nfs41_sequence_done(task, &data->res.seq_res);
7877
7878 switch (task->tk_status) {
7879 case -NFS4ERR_DELAY:
7880 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7881 rpc_restart_call_prepare(task);
7882 }
7883}
7884
7885static void nfs41_free_stateid_release(void *calldata)
7886{
7887 kfree(calldata);
7888}
7889
17f26b12 7890static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7891 .rpc_call_prepare = nfs41_free_stateid_prepare,
7892 .rpc_call_done = nfs41_free_stateid_done,
7893 .rpc_release = nfs41_free_stateid_release,
7894};
7895
7896static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7897 nfs4_stateid *stateid,
ab7cb0df 7898 struct rpc_cred *cred,
7c1d5fae
TM		 7899 bool privileged)
7900{
9aeda35f
BS		 7901 struct rpc_message msg = {
7902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7903 .rpc_cred = cred,
9aeda35f 7904 };
7c1d5fae
TM		 7905 struct rpc_task_setup task_setup = {
7906 .rpc_client = server->client,
7907 .rpc_message = &msg,
7908 .callback_ops = &nfs41_free_stateid_ops,
7909 .flags = RPC_TASK_ASYNC,
7910 };
7911 struct nfs_free_stateid_data *data;
9aeda35f 7912
3787d506
WAA		 7913 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7914 &task_setup.rpc_client, &msg);
7915
38527b15 7916 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7917 data = kmalloc(sizeof(*data), GFP_NOFS);
7918 if (!data)
7919 return ERR_PTR(-ENOMEM);
7920 data->server = server;
7921 nfs4_stateid_copy(&data->args.stateid, stateid);
7922
7923 task_setup.callback_data = data;
7924
7925 msg.rpc_argp = &data->args;
7926 msg.rpc_resp = &data->res;
a9c92d6b 7927 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7928 if (privileged)
7929 nfs4_set_sequence_privileged(&data->args.seq_args);
7930
7931 return rpc_run_task(&task_setup);
9aeda35f
BS		 7932}
7933
38527b15
CL		 7934/**
7935 * nfs41_free_stateid - perform a FREE_STATEID operation
7936 *
7937 * @server: server / transport on which to perform the operation
7938 * @stateid: state ID to release
ab7cb0df 7939 * @cred: credential
38527b15
CL		 7940 *
7941 * Returns NFS_OK if the server freed "stateid". Otherwise a
7942 * negative NFS4ERR value is returned.
7943 */
ab7cb0df
TM		 7944static int nfs41_free_stateid(struct nfs_server *server,
7945 nfs4_stateid *stateid,
7946 struct rpc_cred *cred)
9aeda35f 7947{
7c1d5fae
TM		 7948 struct rpc_task *task;
7949 int ret;
7950
ab7cb0df 7951 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7952 if (IS_ERR(task))
7953 return PTR_ERR(task);
7954 ret = rpc_wait_for_completion_task(task);
7955 if (!ret)
7956 ret = task->tk_status;
7957 rpc_put_task(task);
7958 return ret;
9aeda35f 7959}
36281caa 7960
c8b2d0bf
TM		 7961static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7962{
7963 struct rpc_task *task;
ab7cb0df 7964 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7965
ab7cb0df 7966 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7967 nfs4_free_lock_state(server, lsp);
7968 if (IS_ERR(task))
7969 return PTR_ERR(task);
7970 rpc_put_task(task);
7971 return 0;
7972}
7973
36281caa
TM		 7974static bool nfs41_match_stateid(const nfs4_stateid *s1,
7975 const nfs4_stateid *s2)
7976{
2d2f24ad 7977 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7978 return false;
7979
2d2f24ad 7980 if (s1->seqid == s2->seqid)
36281caa 7981 return true;
2d2f24ad 7982 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7983 return true;
7984
7985 return false;
7986}
7987
557134a3
AA		 7988#endif /* CONFIG_NFS_V4_1 */
7989
36281caa
TM		 7990static bool nfs4_match_stateid(const nfs4_stateid *s1,
7991 const nfs4_stateid *s2)
7992{
f597c537 7993 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7994}
7995
7996
17280175 7997static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7998 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7999 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8000 .recover_open = nfs4_open_reclaim,
8001 .recover_lock = nfs4_lock_reclaim,
591d71cb 8002 .establish_clid = nfs4_init_clientid,
05f4c350 8003 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8004};
8005
591d71cb 8006#if defined(CONFIG_NFS_V4_1)
17280175 8007static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8008 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8009 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8010 .recover_open = nfs4_open_reclaim,
8011 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8012 .establish_clid = nfs41_init_clientid,
fce5c838 8013 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8014 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8015};
8016#endif /* CONFIG_NFS_V4_1 */
8017
17280175 8018static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8019 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8020 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8021 .recover_open = nfs4_open_expired,
8022 .recover_lock = nfs4_lock_expired,
8023 .establish_clid = nfs4_init_clientid,
8024};
8025
8026#if defined(CONFIG_NFS_V4_1)
17280175 8027static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8028 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8029 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8030 .recover_open = nfs41_open_expired,
8031 .recover_lock = nfs41_lock_expired,
4d643d1d 8032 .establish_clid = nfs41_init_clientid,
1da177e4 8033};
591d71cb 8034#endif /* CONFIG_NFS_V4_1 */
1da177e4 8035
17280175 8036static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8037 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8038 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8039 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8040};
8041
8042#if defined(CONFIG_NFS_V4_1)
17280175 8043static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8044 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8045 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8046 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8047};
8048#endif
8049
ec011fe8 8050static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8051 .get_locations = _nfs40_proc_get_locations,
ec011fe8
CL		 8052};
8053
8054#if defined(CONFIG_NFS_V4_1)
8055static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8056 .get_locations = _nfs41_proc_get_locations,
ec011fe8
CL		 8057};
8058#endif /* CONFIG_NFS_V4_1 */
8059
97dc1359
TM		 8060static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8061 .minor_version = 0,
39c6daae
TM		 8062 .init_caps = NFS_CAP_READDIRPLUS
8063 | NFS_CAP_ATOMIC_OPEN
8064 | NFS_CAP_CHANGE_ATTR
8065 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8066 .init_client = nfs40_init_client,
8067 .shutdown_client = nfs40_shutdown_client,
36281caa 8068 .match_stateid = nfs4_match_stateid,
fca78d6d 8069 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8070 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8071 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8072 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8073 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8074 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8075 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8076};
8077
8078#if defined(CONFIG_NFS_V4_1)
8079static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8080 .minor_version = 1,
39c6daae
TM		 8081 .init_caps = NFS_CAP_READDIRPLUS
8082 | NFS_CAP_ATOMIC_OPEN
8083 | NFS_CAP_CHANGE_ATTR
3b66486c 8084 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8085 | NFS_CAP_STATEID_NFSV41
8086 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8087 .init_client = nfs41_init_client,
8088 .shutdown_client = nfs41_shutdown_client,
36281caa 8089 .match_stateid = nfs41_match_stateid,
fca78d6d 8090 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8091 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8092 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8093 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8094 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8095 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8096 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8097};
8098#endif
8099
42c2c424
SD		 8100#if defined(CONFIG_NFS_V4_2)
8101static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8102 .minor_version = 2,
7017310a
BS		 8103 .init_caps = NFS_CAP_READDIRPLUS
8104 | NFS_CAP_ATOMIC_OPEN
8105 | NFS_CAP_CHANGE_ATTR
8106 | NFS_CAP_POSIX_LOCK
8107 | NFS_CAP_STATEID_NFSV41
8108 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8109 .init_client = nfs41_init_client,
8110 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8111 .match_stateid = nfs41_match_stateid,
8112 .find_root_sec = nfs41_find_root_sec,
7017310a 8113 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8114 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8115 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8116 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8117 .state_renewal_ops = &nfs41_state_renewal_ops,
8118};
8119#endif
8120
97dc1359
TM		 8121const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8122 [0] = &nfs_v4_0_minor_ops,
8123#if defined(CONFIG_NFS_V4_1)
8124 [1] = &nfs_v4_1_minor_ops,
8125#endif
42c2c424
SD		 8126#if defined(CONFIG_NFS_V4_2)
8127 [2] = &nfs_v4_2_minor_ops,
8128#endif
97dc1359
TM		 8129};
8130
17f26b12 8131static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8132 .create = nfs_create,
8133 .lookup = nfs_lookup,
8134 .atomic_open = nfs_atomic_open,
8135 .link = nfs_link,
8136 .unlink = nfs_unlink,
8137 .symlink = nfs_symlink,
8138 .mkdir = nfs_mkdir,
8139 .rmdir = nfs_rmdir,
8140 .mknod = nfs_mknod,
8141 .rename = nfs_rename,
8142 .permission = nfs_permission,
8143 .getattr = nfs_getattr,
8144 .setattr = nfs_setattr,
8145 .getxattr = generic_getxattr,
8146 .setxattr = generic_setxattr,
8147 .listxattr = generic_listxattr,
8148 .removexattr = generic_removexattr,
8149};
8150
92e1d5be 8151static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8152 .permission = nfs_permission,
8153 .getattr = nfs_getattr,
8154 .setattr = nfs_setattr,
64c2ce8b
AK		 8155 .getxattr = generic_getxattr,
8156 .setxattr = generic_setxattr,
8157 .listxattr = generic_listxattr,
8158 .removexattr = generic_removexattr,
6b3b5496
BF		 8159};
8160
509de811 8161const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8162 .version = 4, /* protocol version */
8163 .dentry_ops = &nfs4_dentry_operations,
8164 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8165 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8166 .file_ops = &nfs4_file_operations,
1da177e4 8167 .getroot = nfs4_proc_get_root,
281cad46 8168 .submount = nfs4_submount,
ff9099f2 8169 .try_mount = nfs4_try_mount,
1da177e4
LT		 8170 .getattr = nfs4_proc_getattr,
8171 .setattr = nfs4_proc_setattr,
8172 .lookup = nfs4_proc_lookup,
8173 .access = nfs4_proc_access,
8174 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8175 .create = nfs4_proc_create,
8176 .remove = nfs4_proc_remove,
8177 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8178 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8179 .unlink_done = nfs4_proc_unlink_done,
8180 .rename = nfs4_proc_rename,
d3d4152a 8181 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8182 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8183 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8184 .link = nfs4_proc_link,
8185 .symlink = nfs4_proc_symlink,
8186 .mkdir = nfs4_proc_mkdir,
8187 .rmdir = nfs4_proc_remove,
8188 .readdir = nfs4_proc_readdir,
8189 .mknod = nfs4_proc_mknod,
8190 .statfs = nfs4_proc_statfs,
8191 .fsinfo = nfs4_proc_fsinfo,
8192 .pathconf = nfs4_proc_pathconf,
e9326dca 8193 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8194 .decode_dirent = nfs4_decode_dirent,
8195 .read_setup = nfs4_proc_read_setup,
1abb5088 8196 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8197 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8198 .read_done = nfs4_read_done,
1da177e4 8199 .write_setup = nfs4_proc_write_setup,
57208fa7 8200 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8201 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8202 .write_done = nfs4_write_done,
1da177e4 8203 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8204 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8205 .commit_done = nfs4_commit_done,
1da177e4 8206 .lock = nfs4_proc_lock,
e50a1c2e 8207 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8208 .close_context = nfs4_close_context,
2b484297 8209 .open_context = nfs4_atomic_open,
011e2a7f 8210 .have_delegation = nfs4_have_delegation,
57ec14c5 8211 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8212 .alloc_client = nfs4_alloc_client,
45a52a02 8213 .init_client = nfs4_init_client,
cdb7eced 8214 .free_client = nfs4_free_client,
1179acc6
BS		 8215 .create_server = nfs4_create_server,
8216 .clone_server = nfs_clone_server,
1da177e4
LT		 8217};
8218
64c2ce8b
AK		 8219static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8220 .prefix = XATTR_NAME_NFSV4_ACL,
8221 .list = nfs4_xattr_list_nfs4_acl,
8222 .get = nfs4_xattr_get_nfs4_acl,
8223 .set = nfs4_xattr_set_nfs4_acl,
8224};
8225
8226const struct xattr_handler *nfs4_xattr_handlers[] = {
8227 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8228#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8229 &nfs4_xattr_nfs4_label_handler,
8230#endif
64c2ce8b
AK		 8231 NULL
8232};
8233
1da177e4
LT		 8234/*
8235 * Local variables:
8236 * c-basic-offset: 8
8237 * End:
8238 */
Linux 6.x block layer and io_uring tree(s)