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NFS: Clean up nfs_parse_security_flavors()
[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;
03391693 387#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 388 case -NFS4ERR_BADSESSION:
389 case -NFS4ERR_BADSLOT:
390 case -NFS4ERR_BAD_HIGH_SLOT:
391 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
392 case -NFS4ERR_DEADSESSION:
393 case -NFS4ERR_SEQ_FALSE_RETRY:
394 case -NFS4ERR_SEQ_MISORDERED:
395 dprintk("%s ERROR: %d Reset session\n", __func__,
396 errorcode);
9f594791 397 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 398 goto wait_on_recovery;
03391693 399#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 400 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 401 if (exception->timeout > HZ) {
402 /* We have retried a decent amount, time to
403 * fail
404 */
405 ret = -EBUSY;
406 break;
407 }
65de872e
TM		 408 case -NFS4ERR_GRACE:
409 case -NFS4ERR_DELAY:
410 ret = nfs4_delay(server->client, &exception->timeout);
411 if (ret != 0)
412 break;
a8a4ae3a 413 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 414 case -NFS4ERR_OLD_STATEID:
415 exception->retry = 1;
b064eca2
TM		 416 break;
417 case -NFS4ERR_BADOWNER:
418 /* The following works around a Linux server bug! */
419 case -NFS4ERR_BADNAME:
420 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
421 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
422 exception->retry = 1;
423 printk(KERN_WARNING "NFS: v4 server %s "
424 "does not accept raw "
425 "uid/gids. "
426 "Reenabling the idmapper.\n",
427 server->nfs_client->cl_hostname);
428 }
65de872e
TM		 429 }
430 /* We failed to handle the error */
431 return nfs4_map_errors(ret);
0400a6b0 432wait_on_recovery:
a2c0b9e2
TM		 433 ret = nfs4_wait_clnt_recover(clp);
434 if (ret == 0)
435 exception->retry = 1;
436 return ret;
65de872e
TM		 437}
438
a5250def
WAA		 439/*
440 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
441 * or 'false' otherwise.
442 */
443static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
444{
445 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
446
447 if (flavor == RPC_AUTH_GSS_KRB5I ||
448 flavor == RPC_AUTH_GSS_KRB5P)
449 return true;
450
451 return false;
452}
65de872e 453
452e9352 454static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 455{
1da177e4
LT		 456 spin_lock(&clp->cl_lock);
457 if (time_before(clp->cl_last_renewal,timestamp))
458 clp->cl_last_renewal = timestamp;
459 spin_unlock(&clp->cl_lock);
460}
461
452e9352
TM		 462static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
463{
464 do_renew_lease(server->nfs_client, timestamp);
465}
466
2a3eb2b9
CL		 467struct nfs4_call_sync_data {
468 const struct nfs_server *seq_server;
469 struct nfs4_sequence_args *seq_args;
470 struct nfs4_sequence_res *seq_res;
471};
472
a9c92d6b
CL		 473static void nfs4_init_sequence(struct nfs4_sequence_args *args,
474 struct nfs4_sequence_res *res, int cache_reply)
475{
476 args->sa_slot = NULL;
477 args->sa_cache_this = cache_reply;
478 args->sa_privileged = 0;
479
480 res->sr_slot = NULL;
481}
482
483static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
484{
485 args->sa_privileged = 1;
486}
487
3bd2384a
CL		 488static int nfs40_setup_sequence(const struct nfs_server *server,
489 struct nfs4_sequence_args *args,
490 struct nfs4_sequence_res *res,
491 struct rpc_task *task)
492{
493 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
494 struct nfs4_slot *slot;
495
496 /* slot already allocated? */
497 if (res->sr_slot != NULL)
498 goto out_start;
499
500 spin_lock(&tbl->slot_tbl_lock);
501 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
502 goto out_sleep;
503
504 slot = nfs4_alloc_slot(tbl);
505 if (IS_ERR(slot)) {
506 if (slot == ERR_PTR(-ENOMEM))
507 task->tk_timeout = HZ >> 2;
508 goto out_sleep;
509 }
510 spin_unlock(&tbl->slot_tbl_lock);
511
512 args->sa_slot = slot;
513 res->sr_slot = slot;
514
515out_start:
516 rpc_call_start(task);
517 return 0;
518
519out_sleep:
520 if (args->sa_privileged)
521 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
522 NULL, RPC_PRIORITY_PRIVILEGED);
523 else
524 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
525 spin_unlock(&tbl->slot_tbl_lock);
526 return -EAGAIN;
527}
528
529static int nfs40_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
531{
532 struct nfs4_slot *slot = res->sr_slot;
533 struct nfs4_slot_table *tbl;
534
535 if (!RPC_WAS_SENT(task))
536 goto out;
537
538 tbl = slot->table;
539 spin_lock(&tbl->slot_tbl_lock);
540 if (!nfs41_wake_and_assign_slot(tbl, slot))
541 nfs4_free_slot(tbl, slot);
542 spin_unlock(&tbl->slot_tbl_lock);
543
544 res->sr_slot = NULL;
545out:
546 return 1;
547}
548
cccef3b9
AA		 549#if defined(CONFIG_NFS_V4_1)
550
d185a334 551static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 552{
e3725ec0 553 struct nfs4_session *session;
13615871 554 struct nfs4_slot_table *tbl;
c10e4498 555 bool send_new_highest_used_slotid = false;
13615871 556
dfb4f309 557 if (!res->sr_slot) {
13615871
AA		 558 /* just wake up the next guy waiting since
559 * we may have not consumed a slot after all */
691daf3b 560 dprintk("%s: No slot\n", __func__);
35dc1d74 561 return;
13615871 562 }
e3725ec0
TM		 563 tbl = res->sr_slot->table;
564 session = tbl->session;
ea028ac9 565
35dc1d74 566 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 567 /* Be nice to the server: try to ensure that the last transmitted
568 * value for highest_user_slotid <= target_highest_slotid
569 */
570 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
571 send_new_highest_used_slotid = true;
572
b75ad4cd
TM		 573 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
574 send_new_highest_used_slotid = false;
575 goto out_unlock;
576 }
f4af6e2a 577 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 578
579 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
580 send_new_highest_used_slotid = false;
b75ad4cd 581out_unlock:
35dc1d74 582 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 583 res->sr_slot = NULL;
c10e4498
TM		 584 if (send_new_highest_used_slotid)
585 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 586}
587
14516c3a 588static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 589{
e3725ec0 590 struct nfs4_session *session;
933602e3 591 struct nfs4_slot *slot;
14516c3a 592 struct nfs_client *clp;
ac20d163 593 bool interrupted = false;
85563073 594 int ret = 1;
b0df806c 595
468f8613
BS		 596 /* don't increment the sequence number if the task wasn't sent */
597 if (!RPC_WAS_SENT(task))
b0df806c
AA		 598 goto out;
599
933602e3 600 slot = res->sr_slot;
e3725ec0 601 session = slot->table->session;
933602e3 602
ac20d163
TM		 603 if (slot->interrupted) {
604 slot->interrupted = 0;
605 interrupted = true;
606 }
607
2f92ae34 608 trace_nfs4_sequence_done(session, res);
691daf3b 609 /* Check the SEQUENCE operation status */
14516c3a
TM		 610 switch (res->sr_status) {
611 case 0:
b0df806c 612 /* Update the slot's sequence and clientid lease timer */
933602e3 613 ++slot->seq_nr;
e3725ec0 614 clp = session->clp;
8e63b6a8 615 do_renew_lease(clp, res->sr_timestamp);
0629e370 616 /* Check sequence flags */
b4410c2f
TM		 617 if (res->sr_status_flags != 0)
618 nfs4_schedule_lease_recovery(clp);
464ee9f9 619 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 620 break;
ac20d163
TM		 621 case 1:
622 /*
623 * sr_status remains 1 if an RPC level error occurred.
624 * The server may or may not have processed the sequence
625 * operation..
626 * Mark the slot as having hosted an interrupted RPC call.
627 */
628 slot->interrupted = 1;
629 goto out;
14516c3a
TM		 630 case -NFS4ERR_DELAY:
631 /* The server detected a resend of the RPC call and
632 * returned NFS4ERR_DELAY as per Section 2.10.6.2
633 * of RFC5661.
634 */
df2fabff 635 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 636 __func__,
df2fabff 637 slot->slot_nr,
933602e3 638 slot->seq_nr);
14516c3a 639 goto out_retry;
85563073
TM		 640 case -NFS4ERR_BADSLOT:
641 /*
642 * The slot id we used was probably retired. Try again
643 * using a different slot id.
644 */
e8794440
TM		 645 goto retry_nowait;
646 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 647 /*
648 * Was the last operation on this sequence interrupted?
649 * If so, retry after bumping the sequence number.
650 */
651 if (interrupted) {
652 ++slot->seq_nr;
653 goto retry_nowait;
654 }
e8794440
TM		 655 /*
656 * Could this slot have been previously retired?
657 * If so, then the server may be expecting seq_nr = 1!
658 */
8e63b6a8
TM		 659 if (slot->seq_nr != 1) {
660 slot->seq_nr = 1;
661 goto retry_nowait;
662 }
663 break;
e8794440
TM		 664 case -NFS4ERR_SEQ_FALSE_RETRY:
665 ++slot->seq_nr;
666 goto retry_nowait;
14516c3a
TM		 667 default:
668 /* Just update the slot sequence no. */
933602e3 669 ++slot->seq_nr;
b0df806c
AA		 670 }
671out:
672 /* The session may be reset by one of the error handlers. */
673 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 674 nfs41_sequence_free_slot(res);
85563073 675 return ret;
e8794440
TM		 676retry_nowait:
677 if (rpc_restart_call_prepare(task)) {
678 task->tk_status = 0;
679 ret = 0;
680 }
681 goto out;
14516c3a 682out_retry:
d05dd4e9 683 if (!rpc_restart_call(task))
14516c3a
TM		 684 goto out;
685 rpc_delay(task, NFS4_POLL_RETRY_MAX);
686 return 0;
b0df806c
AA		 687}
688
14516c3a
TM		 689static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
df896455 691{
e3725ec0 692 if (res->sr_slot == NULL)
14516c3a 693 return 1;
3bd2384a
CL		 694 if (!res->sr_slot->table->session)
695 return nfs40_sequence_done(task, res);
14516c3a 696 return nfs41_sequence_done(task, res);
df896455
TM		 697}
698
dc70d7b3 699int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 700 struct nfs4_sequence_args *args,
701 struct nfs4_sequence_res *res,
ce5039c1
AA		 702 struct rpc_task *task)
703{
fbcd4abc
AA		 704 struct nfs4_slot *slot;
705 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 706
707 dprintk("--> %s\n", __func__);
ce5039c1 708 /* slot already allocated? */
dfb4f309 709 if (res->sr_slot != NULL)
d9afbd1b 710 goto out_success;
ce5039c1 711
fbcd4abc
AA		 712 tbl = &session->fc_slot_table;
713
69d206b5
TM		 714 task->tk_timeout = 0;
715
fbcd4abc 716 spin_lock(&tbl->slot_tbl_lock);
774d5f14 717 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 718 !args->sa_privileged) {
0b1c8fc4 719 /* The state manager will wait until the slot table is empty */
0b1c8fc4 720 dprintk("%s session is draining\n", __func__);
7b939a3f 721 goto out_sleep;
689cf5c1
AB		 722 }
723
2dc03b7f 724 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 725 if (IS_ERR(slot)) {
726 /* If out of memory, try again in 1/4 second */
727 if (slot == ERR_PTR(-ENOMEM))
728 task->tk_timeout = HZ >> 2;
fbcd4abc 729 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 730 goto out_sleep;
fbcd4abc
AA		 731 }
732 spin_unlock(&tbl->slot_tbl_lock);
733
2b2fa717 734 args->sa_slot = slot;
fbcd4abc 735
e8d92382 736 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 737 slot->slot_nr, slot->seq_nr);
fbcd4abc 738
dfb4f309 739 res->sr_slot = slot;
8e63b6a8 740 res->sr_timestamp = jiffies;
2a6e26cd 741 res->sr_status_flags = 0;
fbcd4abc
AA		 742 /*
743 * sr_status is only set in decode_sequence, and so will remain
744 * set to 1 if an rpc level failure occurs.
745 */
746 res->sr_status = 1;
2f92ae34 747 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 748out_success:
749 rpc_call_start(task);
ce5039c1 750 return 0;
7b939a3f 751out_sleep:
8fe72bac
TM		 752 /* Privileged tasks are queued with top priority */
753 if (args->sa_privileged)
1e1093c7
TM		 754 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
755 NULL, RPC_PRIORITY_PRIVILEGED);
756 else
757 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 758 spin_unlock(&tbl->slot_tbl_lock);
759 return -EAGAIN;
ce5039c1 760}
dc70d7b3 761EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 762
5a580e0a
CL		 763static int nfs4_setup_sequence(const struct nfs_server *server,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
766 struct rpc_task *task)
ce5039c1 767{
035168ab 768 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 769 int ret = 0;
770
3bd2384a
CL		 771 if (!session)
772 return nfs40_setup_sequence(server, args, res, task);
035168ab 773
e8d92382 774 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 775 __func__, session->clp, session, res->sr_slot ?
e8d92382 776 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 777
9d12b216 778 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 779
ce5039c1
AA		 780 dprintk("<-- %s status=%d\n", __func__, ret);
781 return ret;
782}
783
ce5039c1
AA		 784static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
785{
2a3eb2b9 786 struct nfs4_call_sync_data *data = calldata;
6ba7db34 787 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 788
035168ab
TM		 789 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
790
d9afbd1b 791 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 792}
793
69ab40c4
AA		 794static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
69ab40c4 797
14516c3a 798 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 799}
800
17280175 801static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 802 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 803 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 804};
805
3bd2384a
CL		 806#else /* !CONFIG_NFS_V4_1 */
807
9915ea7e
CL		 808static int nfs4_setup_sequence(const struct nfs_server *server,
809 struct nfs4_sequence_args *args,
810 struct nfs4_sequence_res *res,
811 struct rpc_task *task)
812{
3bd2384a 813 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 814}
815
816static int nfs4_sequence_done(struct rpc_task *task,
817 struct nfs4_sequence_res *res)
818{
3bd2384a 819 return nfs40_sequence_done(task, res);
9915ea7e 820}
3bd2384a
CL		 821
822#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 823
824static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
825{
826 struct nfs4_call_sync_data *data = calldata;
827 nfs4_setup_sequence(data->seq_server,
828 data->seq_args, data->seq_res, task);
829}
830
831static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_sequence_done(task, data->seq_res);
835}
836
837static const struct rpc_call_ops nfs40_call_sync_ops = {
838 .rpc_call_prepare = nfs40_call_sync_prepare,
839 .rpc_call_done = nfs40_call_sync_done,
840};
841
7c513058
BS		 842static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
843 struct nfs_server *server,
ce5039c1
AA		 844 struct rpc_message *msg,
845 struct nfs4_sequence_args *args,
8fe72bac 846 struct nfs4_sequence_res *res)
ce5039c1
AA		 847{
848 int ret;
849 struct rpc_task *task;
9915ea7e 850 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 851 struct nfs4_call_sync_data data = {
035168ab 852 .seq_server = server,
ce5039c1
AA		 853 .seq_args = args,
854 .seq_res = res,
ce5039c1
AA		 855 };
856 struct rpc_task_setup task_setup = {
7c513058 857 .rpc_client = clnt,
ce5039c1 858 .rpc_message = msg,
9915ea7e 859 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 860 .callback_data = &data
861 };
862
ce5039c1
AA		 863 task = rpc_run_task(&task_setup);
864 if (IS_ERR(task))
865 ret = PTR_ERR(task);
866 else {
867 ret = task->tk_status;
868 rpc_put_task(task);
869 }
870 return ret;
871}
872
fd0c0953 873static
7c513058
BS		 874int nfs4_call_sync(struct rpc_clnt *clnt,
875 struct nfs_server *server,
e73b83f2
BS		 876 struct rpc_message *msg,
877 struct nfs4_sequence_args *args,
878 struct nfs4_sequence_res *res,
879 int cache_reply)
880{
a9c92d6b 881 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 882 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 883}
cccef3b9 884
38478b24 885static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 886{
38478b24 887 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 888
38478b24 889 spin_lock(&dir->i_lock);
359d7d1c 890 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 891 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 892 nfs_force_lookup_revalidate(dir);
a9a4a87a 893 dir->i_version = cinfo->after;
de242c0b 894 nfs_fscache_invalidate(dir);
38478b24 895 spin_unlock(&dir->i_lock);
1da177e4
LT		 896}
897
e56e0b78 898struct nfs4_opendata {
c6d00e63 899 struct kref kref;
e56e0b78
TM		 900 struct nfs_openargs o_arg;
901 struct nfs_openres o_res;
cdd4e68b
TM		 902 struct nfs_open_confirmargs c_arg;
903 struct nfs_open_confirmres c_res;
6926afd1
TM		 904 struct nfs4_string owner_name;
905 struct nfs4_string group_name;
e56e0b78 906 struct nfs_fattr f_attr;
1775fd3e 907 struct nfs4_label *f_label;
e56e0b78 908 struct dentry *dir;
82a2c1b7 909 struct dentry *dentry;
e56e0b78 910 struct nfs4_state_owner *owner;
aac00a8d 911 struct nfs4_state *state;
e56e0b78 912 struct iattr attrs;
26e976a8 913 unsigned long timestamp;
3e309914 914 unsigned int rpc_done : 1;
bdeca1b7 915 unsigned int is_recover : 1;
24ac23ab
TM		 916 int rpc_status;
917 int cancelled;
e56e0b78
TM		 918};
919
49f9a0fa
TM		 920static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
921 int err, struct nfs4_exception *exception)
922{
923 if (err != -EINVAL)
924 return false;
925 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
926 return false;
927 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
928 exception->retry = 1;
929 return true;
930}
931
932static enum open_claim_type4
933nfs4_map_atomic_open_claim(struct nfs_server *server,
934 enum open_claim_type4 claim)
935{
936 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
937 return claim;
938 switch (claim) {
939 default:
940 return claim;
941 case NFS4_OPEN_CLAIM_FH:
942 return NFS4_OPEN_CLAIM_NULL;
943 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
944 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
945 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
946 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
947 }
948}
2ced46c2
TM		 949
950static void nfs4_init_opendata_res(struct nfs4_opendata *p)
951{
952 p->o_res.f_attr = &p->f_attr;
1775fd3e 953 p->o_res.f_label = p->f_label;
c1d51931
TM		 954 p->o_res.seqid = p->o_arg.seqid;
955 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 956 p->o_res.server = p->o_arg.server;
5f657530 957 p->o_res.access_request = p->o_arg.access;
2ced46c2 958 nfs_fattr_init(&p->f_attr);
6926afd1 959 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 960}
961
82a2c1b7 962static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 963 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 964 const struct iattr *attrs,
1775fd3e 965 struct nfs4_label *label,
4a1c0893 966 enum open_claim_type4 claim,
8535b2be 967 gfp_t gfp_mask)
e56e0b78 968{
82a2c1b7 969 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 970 struct inode *dir = parent->d_inode;
971 struct nfs_server *server = NFS_SERVER(dir);
972 struct nfs4_opendata *p;
973
8535b2be 974 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 975 if (p == NULL)
976 goto err;
14c43f76
DQ		 977
978 p->f_label = nfs4_label_alloc(server, gfp_mask);
979 if (IS_ERR(p->f_label))
980 goto err_free_p;
981
8535b2be 982 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 983 if (p->o_arg.seqid == NULL)
14c43f76 984 goto err_free_label;
82a2c1b7
AV		 985 nfs_sb_active(dentry->d_sb);
986 p->dentry = dget(dentry);
e56e0b78
TM		 987 p->dir = parent;
988 p->owner = sp;
989 atomic_inc(&sp->so_count);
dc0b027d
TM		 990 p->o_arg.open_flags = flags;
991 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 992 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
993 * will return permission denied for all bits until close */
994 if (!(flags & O_EXCL)) {
995 /* ask server to check for all possible rights as results
996 * are cached */
997 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
998 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 999 }
7539bbab 1000 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1001 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1002 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1003 p->o_arg.name = &dentry->d_name;
e56e0b78 1004 p->o_arg.server = server;
aa9c2669 1005 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1006 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1007 p->o_arg.label = label;
49f9a0fa
TM		 1008 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1009 switch (p->o_arg.claim) {
4a1c0893
TM		 1010 case NFS4_OPEN_CLAIM_NULL:
1011 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1012 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1013 p->o_arg.fh = NFS_FH(dir);
1014 break;
1015 case NFS4_OPEN_CLAIM_PREVIOUS:
1016 case NFS4_OPEN_CLAIM_FH:
1017 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1018 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1019 p->o_arg.fh = NFS_FH(dentry->d_inode);
1020 }
536e43d1 1021 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1022 __u32 verf[2];
d77d76ff 1023
e56e0b78
TM		 1024 p->o_arg.u.attrs = &p->attrs;
1025 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1026
1027 verf[0] = jiffies;
1028 verf[1] = current->pid;
1029 memcpy(p->o_arg.u.verifier.data, verf,
1030 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1031 }
cdd4e68b
TM		 1032 p->c_arg.fh = &p->o_res.fh;
1033 p->c_arg.stateid = &p->o_res.stateid;
1034 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1035 nfs4_init_opendata_res(p);
c6d00e63 1036 kref_init(&p->kref);
e56e0b78 1037 return p;
14c43f76
DQ		 1038
1039err_free_label:
1040 nfs4_label_free(p->f_label);
1041err_free_p:
e56e0b78
TM		 1042 kfree(p);
1043err:
1044 dput(parent);
1045 return NULL;
1046}
1047
c6d00e63 1048static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1049{
c6d00e63
TM		 1050 struct nfs4_opendata *p = container_of(kref,
1051 struct nfs4_opendata, kref);
82a2c1b7 1052 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1053
1054 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1055 if (p->state != NULL)
1056 nfs4_put_open_state(p->state);
c6d00e63 1057 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1058
1059 nfs4_label_free(p->f_label);
1060
c6d00e63 1061 dput(p->dir);
82a2c1b7
AV		 1062 dput(p->dentry);
1063 nfs_sb_deactive(sb);
6926afd1 1064 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1065 kfree(p);
1066}
1067
1068static void nfs4_opendata_put(struct nfs4_opendata *p)
1069{
1070 if (p != NULL)
1071 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1072}
1073
06f814a3
TM		 1074static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1075{
06f814a3
TM		 1076 int ret;
1077
06f814a3 1078 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1079 return ret;
1080}
1081
dc0b027d 1082static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1083{
1084 int ret = 0;
dc0b027d 1085
536e43d1 1086 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1087 goto out;
1088 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1089 case FMODE_READ:
88069f77
TM		 1090 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1091 && state->n_rdonly != 0;
6ee41268
TM		 1092 break;
1093 case FMODE_WRITE:
88069f77
TM		 1094 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1095 && state->n_wronly != 0;
6ee41268
TM		 1096 break;
1097 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1099 && state->n_rdwr != 0;
6ee41268 1100 }
dc0b027d 1101out:
6ee41268
TM		 1102 return ret;
1103}
1104
dc0b027d 1105static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1106{
652f89f6
TM		 1107 if (delegation == NULL)
1108 return 0;
dc0b027d 1109 if ((delegation->type & fmode) != fmode)
aac00a8d 1110 return 0;
15c831bf 1111 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1112 return 0;
d25be546
TM		 1113 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1114 return 0;
b7391f44 1115 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1116 return 1;
1117}
1118
dc0b027d 1119static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1120{
dc0b027d 1121 switch (fmode) {
e7616923
TM		 1122 case FMODE_WRITE:
1123 state->n_wronly++;
1124 break;
1125 case FMODE_READ:
1126 state->n_rdonly++;
1127 break;
1128 case FMODE_READ|FMODE_WRITE:
1129 state->n_rdwr++;
1130 }
dc0b027d 1131 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1132}
1133
dc0b027d 1134static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1135{
1136 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1137 nfs4_stateid_copy(&state->stateid, stateid);
1138 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1139 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1140 switch (fmode) {
003707c7
TM		 1141 case FMODE_READ:
1142 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1143 break;
1144 case FMODE_WRITE:
1145 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1146 break;
1147 case FMODE_READ|FMODE_WRITE:
1148 set_bit(NFS_O_RDWR_STATE, &state->flags);
1149 }
e7616923
TM		 1150}
1151
dc0b027d 1152static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1153{
8bda4e4c 1154 write_seqlock(&state->seqlock);
dc0b027d 1155 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1156 write_sequnlock(&state->seqlock);
003707c7
TM		 1157}
1158
dc0b027d 1159static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1160{
8bda4e4c
TM		 1161 /*
1162 * Protect the call to nfs4_state_set_mode_locked and
1163 * serialise the stateid update
1164 */
1165 write_seqlock(&state->seqlock);
003707c7 1166 if (deleg_stateid != NULL) {
f597c537 1167 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1168 set_bit(NFS_DELEGATED_STATE, &state->flags);
1169 }
1170 if (open_stateid != NULL)
dc0b027d 1171 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1172 write_sequnlock(&state->seqlock);
1173 spin_lock(&state->owner->so_lock);
dc0b027d 1174 update_open_stateflags(state, fmode);
ec073428 1175 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1176}
1177
dc0b027d 1178static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1179{
1180 struct nfs_inode *nfsi = NFS_I(state->inode);
1181 struct nfs_delegation *deleg_cur;
1182 int ret = 0;
1183
dc0b027d 1184 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1185
1186 rcu_read_lock();
1187 deleg_cur = rcu_dereference(nfsi->delegation);
1188 if (deleg_cur == NULL)
1189 goto no_delegation;
1190
1191 spin_lock(&deleg_cur->lock);
17f26b12 1192 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1193 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1194 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1195 goto no_delegation_unlock;
1196
1197 if (delegation == NULL)
1198 delegation = &deleg_cur->stateid;
f597c537 1199 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1200 goto no_delegation_unlock;
1201
b7391f44 1202 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1203 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1204 ret = 1;
1205no_delegation_unlock:
1206 spin_unlock(&deleg_cur->lock);
1207no_delegation:
1208 rcu_read_unlock();
1209
1210 if (!ret && open_stateid != NULL) {
dc0b027d 1211 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1212 ret = 1;
1213 }
1214
1215 return ret;
1216}
1217
1218
dc0b027d 1219static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1220{
1221 struct nfs_delegation *delegation;
1222
1223 rcu_read_lock();
1224 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1225 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1226 rcu_read_unlock();
1227 return;
1228 }
1229 rcu_read_unlock();
57ec14c5 1230 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1231}
1232
6ee41268 1233static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1234{
1235 struct nfs4_state *state = opendata->state;
1236 struct nfs_inode *nfsi = NFS_I(state->inode);
1237 struct nfs_delegation *delegation;
f448badd 1238 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1239 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1240 nfs4_stateid stateid;
1241 int ret = -EAGAIN;
1242
aac00a8d 1243 for (;;) {
dc0b027d 1244 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1245 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1246 if (can_open_cached(state, fmode, open_mode)) {
1247 update_open_stateflags(state, fmode);
6ee41268 1248 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1249 goto out_return_state;
1250 }
1251 spin_unlock(&state->owner->so_lock);
1252 }
34310430
TM		 1253 rcu_read_lock();
1254 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1255 if (!can_open_delegated(delegation, fmode)) {
34310430 1256 rcu_read_unlock();
aac00a8d 1257 break;
34310430 1258 }
aac00a8d 1259 /* Save the delegation */
f597c537 1260 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1261 rcu_read_unlock();
fa332941 1262 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1263 if (!opendata->is_recover) {
1264 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1265 if (ret != 0)
1266 goto out;
1267 }
aac00a8d 1268 ret = -EAGAIN;
34310430
TM		 1269
1270 /* Try to update the stateid using the delegation */
dc0b027d 1271 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1272 goto out_return_state;
aac00a8d 1273 }
aac00a8d
TM		 1274out:
1275 return ERR_PTR(ret);
1276out_return_state:
1277 atomic_inc(&state->count);
1278 return state;
1279}
1280
e23008ec
AA		 1281static void
1282nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1283{
1284 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1285 struct nfs_delegation *delegation;
1286 int delegation_flags = 0;
1287
1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation)
1291 delegation_flags = delegation->flags;
1292 rcu_read_unlock();
1293 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1294 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1295 "returning a delegation for "
1296 "OPEN(CLAIM_DELEGATE_CUR)\n",
1297 clp->cl_hostname);
1298 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1299 nfs_inode_set_delegation(state->inode,
1300 data->owner->so_cred,
1301 &data->o_res);
1302 else
1303 nfs_inode_reclaim_delegation(state->inode,
1304 data->owner->so_cred,
1305 &data->o_res);
1306}
1307
1308/*
1309 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1310 * and update the nfs4_state.
1311 */
1312static struct nfs4_state *
1313_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1314{
1315 struct inode *inode = data->state->inode;
1316 struct nfs4_state *state = data->state;
1317 int ret;
1318
1319 if (!data->rpc_done) {
1320 ret = data->rpc_status;
1321 goto err;
1322 }
1323
1324 ret = -ESTALE;
1325 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1326 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1327 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1328 goto err;
1329
1330 ret = -ENOMEM;
1331 state = nfs4_get_open_state(inode, data->owner);
1332 if (state == NULL)
1333 goto err;
1334
1335 ret = nfs_refresh_inode(inode, &data->f_attr);
1336 if (ret)
1337 goto err;
1338
aa9c2669
DQ		 1339 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1340
e23008ec
AA		 1341 if (data->o_res.delegation_type != 0)
1342 nfs4_opendata_check_deleg(data, state);
1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
1345
1346 return state;
1347err:
1348 return ERR_PTR(ret);
1349
1350}
1351
1352static struct nfs4_state *
1353_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1354{
1355 struct inode *inode;
1356 struct nfs4_state *state = NULL;
1b370bc2 1357 int ret;
24ac23ab 1358
aac00a8d 1359 if (!data->rpc_done) {
6ee41268 1360 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1361 goto out;
1362 }
1363
1b370bc2 1364 ret = -EAGAIN;
24ac23ab 1365 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1366 goto err;
1775fd3e 1367 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1368 ret = PTR_ERR(inode);
03f28e3a 1369 if (IS_ERR(inode))
1b370bc2
TM		 1370 goto err;
1371 ret = -ENOMEM;
24ac23ab
TM		 1372 state = nfs4_get_open_state(inode, data->owner);
1373 if (state == NULL)
1b370bc2 1374 goto err_put_inode;
e23008ec
AA		 1375 if (data->o_res.delegation_type != 0)
1376 nfs4_opendata_check_deleg(data, state);
34310430 1377 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1378 data->o_arg.fmode);
24ac23ab 1379 iput(inode);
aac00a8d 1380out:
7aa262b5 1381 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1382 return state;
1b370bc2
TM		 1383err_put_inode:
1384 iput(inode);
1385err:
1386 return ERR_PTR(ret);
24ac23ab
TM		 1387}
1388
e23008ec
AA		 1389static struct nfs4_state *
1390nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1391{
1392 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1393 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1394 return _nfs4_opendata_to_nfs4_state(data);
1395}
1396
864472e9
TM		 1397static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1398{
1399 struct nfs_inode *nfsi = NFS_I(state->inode);
1400 struct nfs_open_context *ctx;
1401
1402 spin_lock(&state->inode->i_lock);
1403 list_for_each_entry(ctx, &nfsi->open_files, list) {
1404 if (ctx->state != state)
1405 continue;
1406 get_nfs_open_context(ctx);
1407 spin_unlock(&state->inode->i_lock);
1408 return ctx;
1409 }
1410 spin_unlock(&state->inode->i_lock);
1411 return ERR_PTR(-ENOENT);
1412}
1413
4a1c0893
TM		 1414static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1415 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1416{
1417 struct nfs4_opendata *opendata;
1418
4a1c0893 1419 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1420 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1421 if (opendata == NULL)
1422 return ERR_PTR(-ENOMEM);
1423 opendata->state = state;
1424 atomic_inc(&state->count);
1425 return opendata;
1426}
1427
dc0b027d 1428static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1429{
2ced46c2 1430 struct nfs4_state *newstate;
864472e9
TM		 1431 int ret;
1432
dc0b027d
TM		 1433 opendata->o_arg.open_flags = 0;
1434 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1435 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1436 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1437 nfs4_init_opendata_res(opendata);
b257957e 1438 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1439 if (ret != 0)
1440 return ret;
2ced46c2 1441 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1442 if (IS_ERR(newstate))
1443 return PTR_ERR(newstate);
643168c2 1444 nfs4_close_state(newstate, fmode);
2ced46c2 1445 *res = newstate;
864472e9
TM		 1446 return 0;
1447}
1448
1449static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1450{
864472e9 1451 struct nfs4_state *newstate;
864472e9
TM		 1452 int ret;
1453
1454 /* memory barrier prior to reading state->n_* */
2ced46c2 1455 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1456 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1457 smp_rmb();
1458 if (state->n_rdwr != 0) {
b0ed9dbc 1459 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1460 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1461 if (ret != 0)
1462 return ret;
2ced46c2
TM		 1463 if (newstate != state)
1464 return -ESTALE;
864472e9
TM		 1465 }
1466 if (state->n_wronly != 0) {
b0ed9dbc 1467 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1468 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1469 if (ret != 0)
1470 return ret;
2ced46c2
TM		 1471 if (newstate != state)
1472 return -ESTALE;
864472e9
TM		 1473 }
1474 if (state->n_rdonly != 0) {
b0ed9dbc 1475 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1476 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1477 if (ret != 0)
1478 return ret;
2ced46c2
TM		 1479 if (newstate != state)
1480 return -ESTALE;
864472e9 1481 }
1ac7e2fd
TM		 1482 /*
1483 * We may have performed cached opens for all three recoveries.
1484 * Check if we need to update the current stateid.
1485 */
1486 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1487 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1488 write_seqlock(&state->seqlock);
1ac7e2fd 1489 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1490 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1491 write_sequnlock(&state->seqlock);
1ac7e2fd 1492 }
864472e9
TM		 1493 return 0;
1494}
1495
1da177e4
LT		 1496/*
1497 * OPEN_RECLAIM:
1498 * reclaim state on the server after a reboot.
1da177e4 1499 */
539cd03a 1500static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1501{
1ac7e2fd 1502 struct nfs_delegation *delegation;
864472e9 1503 struct nfs4_opendata *opendata;
dc0b027d 1504 fmode_t delegation_type = 0;
1da177e4
LT		 1505 int status;
1506
4a1c0893
TM		 1507 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1508 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1509 if (IS_ERR(opendata))
1510 return PTR_ERR(opendata);
1ac7e2fd
TM		 1511 rcu_read_lock();
1512 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1513 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1514 delegation_type = delegation->type;
1ac7e2fd 1515 rcu_read_unlock();
864472e9
TM		 1516 opendata->o_arg.u.delegation_type = delegation_type;
1517 status = nfs4_open_recover(opendata, state);
c6d00e63 1518 nfs4_opendata_put(opendata);
1da177e4
LT		 1519 return status;
1520}
1521
539cd03a 1522static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1523{
1524 struct nfs_server *server = NFS_SERVER(state->inode);
1525 struct nfs4_exception exception = { };
1526 int err;
1527 do {
539cd03a 1528 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1529 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1530 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1531 continue;
168667c4 1532 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1533 break;
1534 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1535 } while (exception.retry);
1536 return err;
1537}
1538
864472e9
TM		 1539static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1540{
1541 struct nfs_open_context *ctx;
1542 int ret;
1543
1544 ctx = nfs4_state_find_open_context(state);
1545 if (IS_ERR(ctx))
91876b13 1546 return -EAGAIN;
539cd03a 1547 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1548 put_nfs_open_context(ctx);
1549 return ret;
1550}
1551
db4f2e63 1552static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1553{
be76b5b6
TM		 1554 switch (err) {
1555 default:
1556 printk(KERN_ERR "NFS: %s: unhandled error "
1557 "%d.\n", __func__, err);
1558 case 0:
1559 case -ENOENT:
1560 case -ESTALE:
1561 break;
1562 case -NFS4ERR_BADSESSION:
1563 case -NFS4ERR_BADSLOT:
1564 case -NFS4ERR_BAD_HIGH_SLOT:
1565 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1566 case -NFS4ERR_DEADSESSION:
1567 set_bit(NFS_DELEGATED_STATE, &state->flags);
1568 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1569 return -EAGAIN;
1570 case -NFS4ERR_STALE_CLIENTID:
1571 case -NFS4ERR_STALE_STATEID:
1572 set_bit(NFS_DELEGATED_STATE, &state->flags);
1573 case -NFS4ERR_EXPIRED:
1574 /* Don't recall a delegation if it was lost */
1575 nfs4_schedule_lease_recovery(server->nfs_client);
1576 return -EAGAIN;
1577 case -NFS4ERR_DELEG_REVOKED:
1578 case -NFS4ERR_ADMIN_REVOKED:
1579 case -NFS4ERR_BAD_STATEID:
db4f2e63 1580 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1581 nfs_inode_find_state_and_recover(state->inode,
1582 stateid);
1583 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1584 return 0;
1585 case -NFS4ERR_DELAY:
1586 case -NFS4ERR_GRACE:
1587 set_bit(NFS_DELEGATED_STATE, &state->flags);
1588 ssleep(1);
1589 return -EAGAIN;
db4f2e63
TM		 1590 case -ENOMEM:
1591 case -NFS4ERR_DENIED:
1592 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1593 return 0;
be76b5b6 1594 }
1da177e4
LT		 1595 return err;
1596}
1597
db4f2e63
TM		 1598int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1599{
1600 struct nfs_server *server = NFS_SERVER(state->inode);
1601 struct nfs4_opendata *opendata;
1602 int err;
1603
1604 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1605 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1606 if (IS_ERR(opendata))
1607 return PTR_ERR(opendata);
1608 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1609 err = nfs4_open_recover(opendata, state);
1610 nfs4_opendata_put(opendata);
1611 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1612}
1613
be05c860
CL		 1614static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1615{
1616 struct nfs4_opendata *data = calldata;
1617
1618 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1619 &data->o_res.seq_res, task);
1620}
1621
cdd4e68b
TM		 1622static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1623{
1624 struct nfs4_opendata *data = calldata;
1625
be05c860
CL		 1626 nfs40_sequence_done(task, &data->o_res.seq_res);
1627
cdd4e68b 1628 data->rpc_status = task->tk_status;
26e976a8 1629 if (data->rpc_status == 0) {
f597c537 1630 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1631 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1632 renew_lease(data->o_res.server, data->timestamp);
3e309914 1633 data->rpc_done = 1;
26e976a8 1634 }
cdd4e68b
TM		 1635}
1636
1637static void nfs4_open_confirm_release(void *calldata)
1638{
1639 struct nfs4_opendata *data = calldata;
1640 struct nfs4_state *state = NULL;
1641
1642 /* If this request hasn't been cancelled, do nothing */
1643 if (data->cancelled == 0)
1644 goto out_free;
1645 /* In case of error, no cleanup! */
3e309914 1646 if (!data->rpc_done)
cdd4e68b 1647 goto out_free;
cdd4e68b 1648 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1649 if (!IS_ERR(state))
643168c2 1650 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1651out_free:
c6d00e63 1652 nfs4_opendata_put(data);
cdd4e68b
TM		 1653}
1654
1655static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1656 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1657 .rpc_call_done = nfs4_open_confirm_done,
1658 .rpc_release = nfs4_open_confirm_release,
1659};
1660
1661/*
1662 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1663 */
1664static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1665{
1666 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1667 struct rpc_task *task;
5138fde0
TM		 1668 struct rpc_message msg = {
1669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1670 .rpc_argp = &data->c_arg,
1671 .rpc_resp = &data->c_res,
1672 .rpc_cred = data->owner->so_cred,
1673 };
c970aa85
TM		 1674 struct rpc_task_setup task_setup_data = {
1675 .rpc_client = server->client,
5138fde0 1676 .rpc_message = &msg,
c970aa85
TM		 1677 .callback_ops = &nfs4_open_confirm_ops,
1678 .callback_data = data,
101070ca 1679 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1680 .flags = RPC_TASK_ASYNC,
1681 };
1da177e4
LT		 1682 int status;
1683
be05c860 1684 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1685 kref_get(&data->kref);
3e309914
TM		 1686 data->rpc_done = 0;
1687 data->rpc_status = 0;
5138fde0 1688 data->timestamp = jiffies;
c970aa85 1689 task = rpc_run_task(&task_setup_data);
7a1218a2 1690 if (IS_ERR(task))
cdd4e68b 1691 return PTR_ERR(task);
cdd4e68b
TM		 1692 status = nfs4_wait_for_completion_rpc_task(task);
1693 if (status != 0) {
1694 data->cancelled = 1;
1695 smp_wmb();
1696 } else
1697 status = data->rpc_status;
e6b3c4db 1698 rpc_put_task(task);
1da177e4
LT		 1699 return status;
1700}
1701
24ac23ab 1702static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1703{
24ac23ab
TM		 1704 struct nfs4_opendata *data = calldata;
1705 struct nfs4_state_owner *sp = data->owner;
549b19cc 1706 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1707
24ac23ab 1708 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1709 goto out_wait;
aac00a8d
TM		 1710 /*
1711 * Check if we still need to send an OPEN call, or if we can use
1712 * a delegation instead.
1713 */
1714 if (data->state != NULL) {
1715 struct nfs_delegation *delegation;
1716
dc0b027d 1717 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1718 goto out_no_action;
aac00a8d
TM		 1719 rcu_read_lock();
1720 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1721 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1722 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1723 can_open_delegated(delegation, data->o_arg.fmode))
1724 goto unlock_no_action;
aac00a8d
TM		 1725 rcu_read_unlock();
1726 }
95b72eb0 1727 /* Update client id. */
549b19cc 1728 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1729 switch (data->o_arg.claim) {
1730 case NFS4_OPEN_CLAIM_PREVIOUS:
1731 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1732 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1733 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1734 case NFS4_OPEN_CLAIM_FH:
1735 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1736 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1737 }
26e976a8 1738 data->timestamp = jiffies;
035168ab 1739 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1740 &data->o_arg.seq_args,
2240a9e2
TM		 1741 &data->o_res.seq_res,
1742 task) != 0)
1743 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1744
1745 /* Set the create mode (note dependency on the session type) */
1746 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1747 if (data->o_arg.open_flags & O_EXCL) {
1748 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1749 if (nfs4_has_persistent_session(clp))
1750 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1751 else if (clp->cl_mvops->minor_version > 0)
1752 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1753 }
6ee41268 1754 return;
652f89f6
TM		 1755unlock_no_action:
1756 rcu_read_unlock();
6ee41268
TM		 1757out_no_action:
1758 task->tk_action = NULL;
c8da19b9 1759out_wait:
b75ad4cd 1760 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1761}
1762
24ac23ab
TM		 1763static void nfs4_open_done(struct rpc_task *task, void *calldata)
1764{
1765 struct nfs4_opendata *data = calldata;
1da177e4 1766
24ac23ab 1767 data->rpc_status = task->tk_status;
d898528c 1768
14516c3a
TM		 1769 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1770 return;
d898528c 1771
24ac23ab 1772 if (task->tk_status == 0) {
807d66d8
TM		 1773 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1774 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1775 case S_IFREG:
1776 break;
1777 case S_IFLNK:
24ac23ab 1778 data->rpc_status = -ELOOP;
6f926b5b
TM		 1779 break;
1780 case S_IFDIR:
24ac23ab 1781 data->rpc_status = -EISDIR;
6f926b5b
TM		 1782 break;
1783 default:
24ac23ab 1784 data->rpc_status = -ENOTDIR;
807d66d8 1785 }
6f926b5b 1786 }
26e976a8 1787 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1788 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1789 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1790 }
3e309914 1791 data->rpc_done = 1;
24ac23ab 1792}
6f926b5b 1793
24ac23ab
TM		 1794static void nfs4_open_release(void *calldata)
1795{
1796 struct nfs4_opendata *data = calldata;
1797 struct nfs4_state *state = NULL;
1798
1799 /* If this request hasn't been cancelled, do nothing */
1800 if (data->cancelled == 0)
1801 goto out_free;
1802 /* In case of error, no cleanup! */
3e309914 1803 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1804 goto out_free;
1805 /* In case we need an open_confirm, no cleanup! */
1806 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1807 goto out_free;
24ac23ab 1808 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1809 if (!IS_ERR(state))
643168c2 1810 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1811out_free:
c6d00e63 1812 nfs4_opendata_put(data);
24ac23ab
TM		 1813}
1814
1815static const struct rpc_call_ops nfs4_open_ops = {
1816 .rpc_call_prepare = nfs4_open_prepare,
1817 .rpc_call_done = nfs4_open_done,
1818 .rpc_release = nfs4_open_release,
1819};
1820
b257957e 1821static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1822{
1823 struct inode *dir = data->dir->d_inode;
1824 struct nfs_server *server = NFS_SERVER(dir);
1825 struct nfs_openargs *o_arg = &data->o_arg;
1826 struct nfs_openres *o_res = &data->o_res;
1827 struct rpc_task *task;
5138fde0
TM		 1828 struct rpc_message msg = {
1829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1830 .rpc_argp = o_arg,
1831 .rpc_resp = o_res,
1832 .rpc_cred = data->owner->so_cred,
1833 };
c970aa85
TM		 1834 struct rpc_task_setup task_setup_data = {
1835 .rpc_client = server->client,
5138fde0 1836 .rpc_message = &msg,
c970aa85
TM		 1837 .callback_ops = &nfs4_open_ops,
1838 .callback_data = data,
101070ca 1839 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1840 .flags = RPC_TASK_ASYNC,
1841 };
24ac23ab
TM		 1842 int status;
1843
a9c92d6b 1844 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1845 kref_get(&data->kref);
3e309914
TM		 1846 data->rpc_done = 0;
1847 data->rpc_status = 0;
2ced46c2 1848 data->cancelled = 0;
bdeca1b7
TM		 1849 data->is_recover = 0;
1850 if (isrecover) {
8fe72bac 1851 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1852 data->is_recover = 1;
1853 }
c970aa85 1854 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1855 if (IS_ERR(task))
1856 return PTR_ERR(task);
1857 status = nfs4_wait_for_completion_rpc_task(task);
1858 if (status != 0) {
1859 data->cancelled = 1;
1860 smp_wmb();
1861 } else
1862 status = data->rpc_status;
1863 rpc_put_task(task);
1864
1865 return status;
1866}
1867
1868static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1869{
1870 struct inode *dir = data->dir->d_inode;
1871 struct nfs_openres *o_res = &data->o_res;
1872 int status;
1873
1874 status = nfs4_run_open_task(data, 1);
1875 if (status != 0 || !data->rpc_done)
1876 return status;
1877
6926afd1
TM		 1878 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1879
b257957e
AB		 1880 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1881 status = _nfs4_proc_open_confirm(data);
1882 if (status != 0)
1883 return status;
1884 }
1885
1886 return status;
1887}
1888
6168f62c
WAA		 1889static int nfs4_opendata_access(struct rpc_cred *cred,
1890 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1891 struct nfs4_state *state, fmode_t fmode,
1892 int openflags)
6168f62c
WAA		 1893{
1894 struct nfs_access_entry cache;
1895 u32 mask;
1896
1897 /* access call failed or for some reason the server doesn't
1898 * support any access modes -- defer access call until later */
1899 if (opendata->o_res.access_supported == 0)
1900 return 0;
1901
1902 mask = 0;
bbd3a8ee 1903 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1904 * write mode bits, but POSIX allows the creating process to write.
1905 * use openflags to check for exec, because fmode won't
1906 * always have FMODE_EXEC set when file open for exec. */
1907 if (openflags & __FMODE_EXEC) {
1908 /* ONLY check for exec rights */
1909 mask = MAY_EXEC;
1910 } else if (fmode & FMODE_READ)
1911 mask = MAY_READ;
6168f62c
WAA		 1912
1913 cache.cred = cred;
1914 cache.jiffies = jiffies;
1915 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1916 nfs_access_add_cache(state->inode, &cache);
1917
bbd3a8ee 1918 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1919 return 0;
1920
1921 /* even though OPEN succeeded, access is denied. Close the file */
1922 nfs4_close_state(state, fmode);
998f40b5 1923 return -EACCES;
6168f62c
WAA		 1924}
1925
b257957e
AB		 1926/*
1927 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1928 */
1929static int _nfs4_proc_open(struct nfs4_opendata *data)
1930{
1931 struct inode *dir = data->dir->d_inode;
1932 struct nfs_server *server = NFS_SERVER(dir);
1933 struct nfs_openargs *o_arg = &data->o_arg;
1934 struct nfs_openres *o_res = &data->o_res;
1935 int status;
1936
1937 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1938 if (!data->rpc_done)
1939 return status;
1940 if (status != 0) {
1941 if (status == -NFS4ERR_BADNAME &&
1942 !(o_arg->open_flags & O_CREAT))
1943 return -ENOENT;
24ac23ab 1944 return status;
08ef7bd3 1945 }
24ac23ab 1946
6926afd1
TM		 1947 nfs_fattr_map_and_free_names(server, &data->f_attr);
1948
90ff0c54 1949 if (o_arg->open_flags & O_CREAT)
56ae19f3 1950 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1951 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1952 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1953 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1954 status = _nfs4_proc_open_confirm(data);
1da177e4 1955 if (status != 0)
24ac23ab 1956 return status;
1da177e4
LT		 1957 }
1958 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1959 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1960 return 0;
1da177e4
LT		 1961}
1962
d83217c1
AA		 1963static int nfs4_recover_expired_lease(struct nfs_server *server)
1964{
1965 return nfs4_client_recover_expired_lease(server->nfs_client);
1966}
1967
1da177e4
LT		 1968/*
1969 * OPEN_EXPIRED:
1970 * reclaim state on the server after a network partition.
1971 * Assumes caller holds the appropriate lock
1972 */
539cd03a 1973static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1974{
e56e0b78 1975 struct nfs4_opendata *opendata;
864472e9 1976 int ret;
1da177e4 1977
4a1c0893 1978 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1979 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1980 if (IS_ERR(opendata))
1981 return PTR_ERR(opendata);
864472e9 1982 ret = nfs4_open_recover(opendata, state);
35d05778 1983 if (ret == -ESTALE)
3d4ff43d 1984 d_drop(ctx->dentry);
c6d00e63 1985 nfs4_opendata_put(opendata);
864472e9 1986 return ret;
1da177e4
LT		 1987}
1988
a9ed2e25 1989static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1990{
539cd03a 1991 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1992 struct nfs4_exception exception = { };
1993 int err;
1994
1995 do {
539cd03a 1996 err = _nfs4_open_expired(ctx, state);
42113a75 1997 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1998 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1999 continue;
a9ed2e25
TM		 2000 switch (err) {
2001 default:
2002 goto out;
2003 case -NFS4ERR_GRACE:
2004 case -NFS4ERR_DELAY:
2005 nfs4_handle_exception(server, err, &exception);
2006 err = 0;
2007 }
202b50dc 2008 } while (exception.retry);
a9ed2e25 2009out:
202b50dc
TM		 2010 return err;
2011}
2012
1da177e4
LT		 2013static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2014{
1da177e4 2015 struct nfs_open_context *ctx;
864472e9 2016 int ret;
1da177e4 2017
864472e9
TM		 2018 ctx = nfs4_state_find_open_context(state);
2019 if (IS_ERR(ctx))
91876b13 2020 return -EAGAIN;
539cd03a 2021 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2022 put_nfs_open_context(ctx);
2023 return ret;
1da177e4
LT		 2024}
2025
f062eb6c 2026#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2027static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2028{
f062eb6c 2029 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2030 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2031 struct nfs_delegation *delegation;
2032 struct rpc_cred *cred = NULL;
2033 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2034
2035 /* If a state reset has been done, test_stateid is unneeded */
2036 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2037 return;
2038
ab7cb0df
TM		 2039 /* Get the delegation credential for use by test/free_stateid */
2040 rcu_read_lock();
2041 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2042 if (delegation != NULL &&
2043 nfs4_stateid_match(&delegation->stateid, stateid)) {
2044 cred = get_rpccred(delegation->cred);
2045 rcu_read_unlock();
2046 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2047 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2048 } else
2049 rcu_read_unlock();
2050
3e60ffdd
CL		 2051 if (status != NFS_OK) {
2052 /* Free the stateid unless the server explicitly
2053 * informs us the stateid is unrecognized. */
2054 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2055 nfs41_free_stateid(server, stateid, cred);
6938867e 2056 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2057
6938867e
BS		 2058 write_seqlock(&state->seqlock);
2059 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2060 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2061 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2062 }
ab7cb0df
TM		 2063
2064 if (cred != NULL)
2065 put_rpccred(cred);
3e60ffdd
CL		 2066}
2067
2068/**
2069 * nfs41_check_open_stateid - possibly free an open stateid
2070 *
2071 * @state: NFSv4 state for an inode
2072 *
2073 * Returns NFS_OK if recovery for this stateid is now finished.
2074 * Otherwise a negative NFS4ERR value is returned.
2075 */
2076static int nfs41_check_open_stateid(struct nfs4_state *state)
2077{
2078 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2079 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2080 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2081 int status;
2082
2083 /* If a state reset has been done, test_stateid is unneeded */
2084 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2085 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2086 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2087 return -NFS4ERR_BAD_STATEID;
2088
ab7cb0df 2089 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2090 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2091 if (status != NFS_OK) {
2092 /* Free the stateid unless the server explicitly
2093 * informs us the stateid is unrecognized. */
2094 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2095 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2096
2097 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2099 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2100 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2101 }
2102 return status;
2103}
2104
2105static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2106{
eb64cf96 2107 int status;
b01dd1d8 2108
3e60ffdd
CL		 2109 nfs41_clear_delegation_stateid(state);
2110 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2111 if (status != NFS_OK)
2112 status = nfs4_open_expired(sp, state);
2113 return status;
f062eb6c
BS		 2114}
2115#endif
2116
aa53ed54
JL		 2117/*
2118 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2119 * fields corresponding to attributes that were used to store the verifier.
2120 * Make sure we clobber those fields in the later setattr call
2121 */
2122static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2123{
2124 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2125 !(sattr->ia_valid & ATTR_ATIME_SET))
2126 sattr->ia_valid |= ATTR_ATIME;
2127
2128 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2129 !(sattr->ia_valid & ATTR_MTIME_SET))
2130 sattr->ia_valid |= ATTR_MTIME;
2131}
2132
c21443c2
TM		 2133static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2134 fmode_t fmode,
2135 int flags,
3efb9722 2136 struct nfs_open_context *ctx)
c21443c2
TM		 2137{
2138 struct nfs4_state_owner *sp = opendata->owner;
2139 struct nfs_server *server = sp->so_server;
275bb307 2140 struct dentry *dentry;
c21443c2
TM		 2141 struct nfs4_state *state;
2142 unsigned int seq;
2143 int ret;
2144
2145 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2146
2147 ret = _nfs4_proc_open(opendata);
2148 if (ret != 0)
2149 goto out;
2150
2151 state = nfs4_opendata_to_nfs4_state(opendata);
2152 ret = PTR_ERR(state);
2153 if (IS_ERR(state))
2154 goto out;
2155 if (server->caps & NFS_CAP_POSIX_LOCK)
2156 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2157
275bb307
TM		 2158 dentry = opendata->dentry;
2159 if (dentry->d_inode == NULL) {
2160 /* FIXME: Is this d_drop() ever needed? */
2161 d_drop(dentry);
2162 dentry = d_add_unique(dentry, igrab(state->inode));
2163 if (dentry == NULL) {
2164 dentry = opendata->dentry;
2165 } else if (dentry != ctx->dentry) {
2166 dput(ctx->dentry);
2167 ctx->dentry = dget(dentry);
2168 }
2169 nfs_set_verifier(dentry,
2170 nfs_save_change_attribute(opendata->dir->d_inode));
2171 }
2172
c21443c2
TM		 2173 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2174 if (ret != 0)
2175 goto out;
2176
3efb9722 2177 ctx->state = state;
c45ffdd2
TM		 2178 if (dentry->d_inode == state->inode) {
2179 nfs_inode_attach_open_context(ctx);
2180 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2181 nfs4_schedule_stateid_recovery(server, state);
2182 }
c21443c2
TM		 2183out:
2184 return ret;
2185}
2186
1da177e4 2187/*
24ac23ab 2188 * Returns a referenced nfs4_state
1da177e4 2189 */
82be417a 2190static int _nfs4_do_open(struct inode *dir,
4197a055 2191 struct nfs_open_context *ctx,
82be417a
AA		 2192 int flags,
2193 struct iattr *sattr,
959d921f 2194 struct nfs4_label *label)
1da177e4
LT		 2195{
2196 struct nfs4_state_owner *sp;
2197 struct nfs4_state *state = NULL;
2198 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2199 struct nfs4_opendata *opendata;
4197a055
TM		 2200 struct dentry *dentry = ctx->dentry;
2201 struct rpc_cred *cred = ctx->cred;
2202 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2203 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2204 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2205 struct nfs4_label *olabel = NULL;
aac00a8d 2206 int status;
1da177e4
LT		 2207
2208 /* Protect against reboot recovery conflicts */
1da177e4 2209 status = -ENOMEM;
d1e284d5
TM		 2210 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2211 if (sp == NULL) {
1da177e4
LT		 2212 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2213 goto out_err;
2214 }
58d9714a
TM		 2215 status = nfs4_recover_expired_lease(server);
2216 if (status != 0)
b4454fe1 2217 goto err_put_state_owner;
82a2c1b7
AV		 2218 if (dentry->d_inode != NULL)
2219 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2220 status = -ENOMEM;
49f9a0fa
TM		 2221 if (dentry->d_inode)
2222 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2223 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2224 label, claim, GFP_KERNEL);
e56e0b78 2225 if (opendata == NULL)
95d35cb4 2226 goto err_put_state_owner;
1da177e4 2227
14c43f76
DQ		 2228 if (label) {
2229 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2230 if (IS_ERR(olabel)) {
2231 status = PTR_ERR(olabel);
2232 goto err_opendata_put;
2233 }
2234 }
2235
82be417a
AA		 2236 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2237 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2238 if (!opendata->f_attr.mdsthreshold)
14c43f76 2239 goto err_free_label;
1549210f 2240 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2241 }
82a2c1b7
AV		 2242 if (dentry->d_inode != NULL)
2243 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2244
3efb9722 2245 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2246 if (status != 0)
14c43f76 2247 goto err_free_label;
3efb9722 2248 state = ctx->state;
6168f62c 2249
549b19cc
TM		 2250 if ((opendata->o_arg.open_flags & O_EXCL) &&
2251 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2252 nfs4_exclusive_attrset(opendata, sattr);
2253
2254 nfs_fattr_init(opendata->o_res.f_attr);
2255 status = nfs4_do_setattr(state->inode, cred,
2256 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2257 state, label, olabel);
2258 if (status == 0) {
0ab64e0e 2259 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2260 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2261 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2262 }
0ab64e0e 2263 }
82be417a
AA		 2264
2265 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2266 *ctx_th = opendata->f_attr.mdsthreshold;
2267 else
2268 kfree(opendata->f_attr.mdsthreshold);
2269 opendata->f_attr.mdsthreshold = NULL;
2270
14c43f76
DQ		 2271 nfs4_label_free(olabel);
2272
c6d00e63 2273 nfs4_opendata_put(opendata);
1da177e4 2274 nfs4_put_state_owner(sp);
1da177e4 2275 return 0;
14c43f76
DQ		 2276err_free_label:
2277 nfs4_label_free(olabel);
c6d00e63 2278err_opendata_put:
82be417a 2279 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2280 nfs4_opendata_put(opendata);
e56e0b78
TM		 2281err_put_state_owner:
2282 nfs4_put_state_owner(sp);
1da177e4 2283out_err:
1da177e4
LT		 2284 return status;
2285}
2286
2287
82be417a 2288static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2289 struct nfs_open_context *ctx,
82be417a
AA		 2290 int flags,
2291 struct iattr *sattr,
959d921f 2292 struct nfs4_label *label)
1da177e4 2293{
49f9a0fa 2294 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2295 struct nfs4_exception exception = { };
2296 struct nfs4_state *res;
2297 int status;
2298
2299 do {
959d921f 2300 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2301 res = ctx->state;
42113a75 2302 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2303 if (status == 0)
2304 break;
2305 /* NOTE: BAD_SEQID means the server and client disagree about the
2306 * book-keeping w.r.t. state-changing operations
2307 * (OPEN/CLOSE/LOCK/LOCKU...)
2308 * It is actually a sign of a bug on the client or on the server.
2309 *
2310 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2311 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2312 * have unhashed the old state_owner for us, and that we can
2313 * therefore safely retry using a new one. We should still warn
2314 * the user though...
2315 */
2316 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2317 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2318 " returned a bad sequence-id error!\n",
2319 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2320 exception.retry = 1;
2321 continue;
2322 }
550f5747
TM		 2323 /*
2324 * BAD_STATEID on OPEN means that the server cancelled our
2325 * state before it received the OPEN_CONFIRM.
2326 * Recover by retrying the request as per the discussion
2327 * on Page 181 of RFC3530.
2328 */
2329 if (status == -NFS4ERR_BAD_STATEID) {
2330 exception.retry = 1;
2331 continue;
2332 }
aac00a8d
TM		 2333 if (status == -EAGAIN) {
2334 /* We must have found a delegation */
2335 exception.retry = 1;
2336 continue;
2337 }
49f9a0fa
TM		 2338 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2339 continue;
2340 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2341 status, &exception));
2342 } while (exception.retry);
2343 return res;
2344}
2345
659bfcd6
TM		 2346static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2347 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2348 struct nfs4_state *state, struct nfs4_label *ilabel,
2349 struct nfs4_label *olabel)
1da177e4 2350{
3e4f6290 2351 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2352 struct nfs_setattrargs arg = {
3e4f6290 2353 .fh = NFS_FH(inode),
1da177e4
LT		 2354 .iap = sattr,
2355 .server = server,
2356 .bitmask = server->attr_bitmask,
1775fd3e 2357 .label = ilabel,
1da177e4
LT		 2358 };
2359 struct nfs_setattrres res = {
2360 .fattr = fattr,
1775fd3e 2361 .label = olabel,
1da177e4
LT		 2362 .server = server,
2363 };
2364 struct rpc_message msg = {
659bfcd6
TM		 2365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2366 .rpc_argp = &arg,
2367 .rpc_resp = &res,
2368 .rpc_cred = cred,
1da177e4 2369 };
26e976a8 2370 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2371 fmode_t fmode;
2372 bool truncate;
65e4308d 2373 int status;
1da177e4 2374
aa9c2669
DQ		 2375 arg.bitmask = nfs4_bitmask(server, ilabel);
2376 if (ilabel)
2377 arg.bitmask = nfs4_bitmask(server, olabel);
2378
0e574af1 2379 nfs_fattr_init(fattr);
1da177e4 2380
ee3ae84e
TM		 2381 /* Servers should only apply open mode checks for file size changes */
2382 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2383 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2384
2385 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2386 /* Use that stateid */
2387 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2388 struct nfs_lockowner lockowner = {
2389 .l_owner = current->files,
2390 .l_pid = current->tgid,
2391 };
4fc8796d 2392 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2393 &lockowner);
08e9eac4 2394 } else
f597c537 2395 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2396
7c513058 2397 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2398 if (status == 0 && state != NULL)
2399 renew_lease(server, timestamp);
65e4308d 2400 return status;
1da177e4
LT		 2401}
2402
659bfcd6
TM		 2403static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2404 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2405 struct nfs4_state *state, struct nfs4_label *ilabel,
2406 struct nfs4_label *olabel)
1da177e4 2407{
3e4f6290 2408 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2409 struct nfs4_exception exception = {
2410 .state = state,
3114ea7a 2411 .inode = inode,
a1d0b5ee 2412 };
1da177e4
LT		 2413 int err;
2414 do {
1775fd3e 2415 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2416 trace_nfs4_setattr(inode, err);
451146be
TM		 2417 switch (err) {
2418 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2419 if (!(sattr->ia_valid & ATTR_SIZE)) {
2420 pr_warn_once("NFSv4: server %s is incorrectly "
2421 "applying open mode checks to "
2422 "a SETATTR that is not "
2423 "changing file size.\n",
2424 server->nfs_client->cl_hostname);
2425 }
451146be
TM		 2426 if (state && !(state->state & FMODE_WRITE)) {
2427 err = -EBADF;
2428 if (sattr->ia_valid & ATTR_OPEN)
2429 err = -EACCES;
2430 goto out;
2431 }
2432 }
2433 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2434 } while (exception.retry);
451146be 2435out:
1da177e4
LT		 2436 return err;
2437}
2438
2439struct nfs4_closedata {
2440 struct inode *inode;
2441 struct nfs4_state *state;
2442 struct nfs_closeargs arg;
2443 struct nfs_closeres res;
516a6af6 2444 struct nfs_fattr fattr;
26e976a8 2445 unsigned long timestamp;
f7e8917a
FI		 2446 bool roc;
2447 u32 roc_barrier;
1da177e4
LT		 2448};
2449
963d8fe5 2450static void nfs4_free_closedata(void *data)
9512135d 2451{
963d8fe5
TM		 2452 struct nfs4_closedata *calldata = data;
2453 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2454 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2455
f7e8917a
FI		 2456 if (calldata->roc)
2457 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2458 nfs4_put_open_state(calldata->state);
2459 nfs_free_seqid(calldata->arg.seqid);
9512135d 2460 nfs4_put_state_owner(sp);
322b2b90 2461 nfs_sb_deactive(sb);
9512135d
TM		 2462 kfree(calldata);
2463}
2464
88069f77
TM		 2465static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2466 fmode_t fmode)
2467{
2468 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2469 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2470 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2471 case FMODE_WRITE:
88069f77 2472 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2473 break;
2474 case FMODE_READ:
88069f77 2475 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2476 break;
2477 case 0:
2478 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2479 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2480 clear_bit(NFS_OPEN_STATE, &state->flags);
2481 }
88069f77
TM		 2482 spin_unlock(&state->owner->so_lock);
2483}
2484
963d8fe5 2485static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2486{
963d8fe5 2487 struct nfs4_closedata *calldata = data;
1da177e4 2488 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2489 struct nfs_server *server = NFS_SERVER(calldata->inode);
2490
a3ca5651 2491 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2492 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2493 return;
42113a75 2494 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2495 /* hmm. we are done with the inode, and in the process of freeing
2496 * the state_owner. we keep this around to process errors
2497 */
1da177e4
LT		 2498 switch (task->tk_status) {
2499 case 0:
f7e8917a
FI		 2500 if (calldata->roc)
2501 pnfs_roc_set_barrier(state->inode,
2502 calldata->roc_barrier);
45328c35 2503 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2504 renew_lease(server, calldata->timestamp);
88069f77
TM		 2505 nfs4_close_clear_stateid_flags(state,
2506 calldata->arg.fmode);
1da177e4
LT		 2507 break;
2508 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2509 case -NFS4ERR_OLD_STATEID:
2510 case -NFS4ERR_BAD_STATEID:
1da177e4 2511 case -NFS4ERR_EXPIRED:
dc0b027d 2512 if (calldata->arg.fmode == 0)
9e33bed5 2513 break;
1da177e4 2514 default:
72211dbe
TM		 2515 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2516 rpc_restart_call_prepare(task);
1da177e4 2517 }
72211dbe 2518 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2519 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2520 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2521}
2522
4ce70ada 2523static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2524{
4ce70ada 2525 struct nfs4_closedata *calldata = data;
9512135d 2526 struct nfs4_state *state = calldata->state;
7fdab069 2527 struct inode *inode = calldata->inode;
88069f77 2528 int call_close = 0;
9512135d 2529
a3ca5651 2530 dprintk("%s: begin!\n", __func__);
963d8fe5 2531 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2532 goto out_wait;
003707c7 2533
88069f77
TM		 2534 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2535 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2536 spin_lock(&state->owner->so_lock);
003707c7 2537 /* Calculate the change in open mode */
e7616923 2538 if (state->n_rdwr == 0) {
003707c7 2539 if (state->n_rdonly == 0) {
88069f77
TM		 2540 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2541 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2542 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2543 }
2544 if (state->n_wronly == 0) {
88069f77
TM		 2545 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2546 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2547 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2548 }
e7616923 2549 }
5d422301
TM		 2550 if (!nfs4_valid_open_stateid(state))
2551 call_close = 0;
4cecb76f 2552 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2553
2554 if (!call_close) {
963d8fe5 2555 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2556 goto out_no_action;
9512135d 2557 }
88069f77 2558
f7e8917a 2559 if (calldata->arg.fmode == 0) {
88069f77 2560 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2561 if (calldata->roc &&
b9536ad5
AA		 2562 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2563 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2564 goto out_wait;
b9536ad5 2565 }
f7e8917a 2566 }
88069f77 2567
516a6af6 2568 nfs_fattr_init(calldata->res.fattr);
26e976a8 2569 calldata->timestamp = jiffies;
7fdab069 2570 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2571 &calldata->arg.seq_args,
2572 &calldata->res.seq_res,
2240a9e2
TM		 2573 task) != 0)
2574 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2575 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2576 return;
2577out_no_action:
2578 task->tk_action = NULL;
2579out_wait:
2580 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2581}
2582
963d8fe5 2583static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2584 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2585 .rpc_call_done = nfs4_close_done,
2586 .rpc_release = nfs4_free_closedata,
2587};
2588
1da177e4
LT		 2589/*
2590 * It is possible for data to be read/written from a mem-mapped file
2591 * after the sys_close call (which hits the vfs layer as a flush).
2592 * This means that we can't safely call nfsv4 close on a file until
2593 * the inode is cleared. This in turn means that we are not good
2594 * NFSv4 citizens - we do not indicate to the server to update the file's
2595 * share state even when we are done with one of the three share
2596 * stateid's in the inode.
2597 *
2598 * NOTE: Caller must be holding the sp->so_owner semaphore!
2599 */
1f7977c1 2600int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2601{
4a35bd41 2602 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2603 struct nfs4_closedata *calldata;
b39e625b
TM		 2604 struct nfs4_state_owner *sp = state->owner;
2605 struct rpc_task *task;
5138fde0
TM		 2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2608 .rpc_cred = state->owner->so_cred,
2609 };
c970aa85
TM		 2610 struct rpc_task_setup task_setup_data = {
2611 .rpc_client = server->client,
5138fde0 2612 .rpc_message = &msg,
c970aa85 2613 .callback_ops = &nfs4_close_ops,
101070ca 2614 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2615 .flags = RPC_TASK_ASYNC,
2616 };
9512135d 2617 int status = -ENOMEM;
1da177e4 2618
fa940720
WAA		 2619 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2620 &task_setup_data.rpc_client, &msg);
2621
8535b2be 2622 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2623 if (calldata == NULL)
9512135d 2624 goto out;
a9c92d6b 2625 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2626 calldata->inode = state->inode;
1da177e4 2627 calldata->state = state;
4a35bd41 2628 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2629 calldata->arg.stateid = &state->open_stateid;
1da177e4 2630 /* Serialization for the sequence id */
8535b2be 2631 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2632 if (calldata->arg.seqid == NULL)
2633 goto out_free_calldata;
dc0b027d 2634 calldata->arg.fmode = 0;
a65318bf 2635 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2636 calldata->res.fattr = &calldata->fattr;
c1d51931 2637 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2638 calldata->res.server = server;
1f7977c1 2639 calldata->roc = pnfs_roc(state->inode);
643168c2 2640 nfs_sb_active(calldata->inode->i_sb);
9512135d 2641
1174dd1f
TM		 2642 msg.rpc_argp = &calldata->arg;
2643 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2644 task_setup_data.callback_data = calldata;
2645 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2646 if (IS_ERR(task))
2647 return PTR_ERR(task);
a49c3c77
TM		 2648 status = 0;
2649 if (wait)
2650 status = rpc_wait_for_completion_task(task);
b39e625b 2651 rpc_put_task(task);
a49c3c77 2652 return status;
9512135d
TM		 2653out_free_calldata:
2654 kfree(calldata);
2655out:
b39e625b
TM		 2656 nfs4_put_open_state(state);
2657 nfs4_put_state_owner(sp);
9512135d 2658 return status;
1da177e4
LT		 2659}
2660
2b484297 2661static struct inode *
cd9a1c0e 2662nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2663{
1da177e4 2664 struct nfs4_state *state;
aa9c2669
DQ		 2665 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2666
2667 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2668
565277f6 2669 /* Protect against concurrent sillydeletes */
959d921f 2670 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2671
2672 nfs4_label_release_security(label);
2673
f46e0bd3
TM		 2674 if (IS_ERR(state))
2675 return ERR_CAST(state);
275bb307 2676 return state->inode;
1da177e4
LT		 2677}
2678
1185a552 2679static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2680{
2681 if (ctx->state == NULL)
2682 return;
2683 if (is_sync)
643168c2 2684 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2685 else
643168c2 2686 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2687}
1da177e4
LT		 2688
2689static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2690{
43652ad5
BH		 2691 struct nfs4_server_caps_arg args = {
2692 .fhandle = fhandle,
2693 };
1da177e4
LT		 2694 struct nfs4_server_caps_res res = {};
2695 struct rpc_message msg = {
2696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2697 .rpc_argp = &args,
1da177e4
LT		 2698 .rpc_resp = &res,
2699 };
2700 int status;
2701
7c513058 2702 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2703 if (status == 0) {
2704 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2705 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2706 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2707 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2708 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2709 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2710 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2711 server->caps |= NFS_CAP_ACLS;
2712 if (res.has_links != 0)
2713 server->caps |= NFS_CAP_HARDLINKS;
2714 if (res.has_symlinks != 0)
2715 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2716 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2717 server->caps |= NFS_CAP_FILEID;
2718 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2719 server->caps |= NFS_CAP_MODE;
2720 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2721 server->caps |= NFS_CAP_NLINK;
2722 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2723 server->caps |= NFS_CAP_OWNER;
2724 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2725 server->caps |= NFS_CAP_OWNER_GROUP;
2726 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2727 server->caps |= NFS_CAP_ATIME;
2728 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2729 server->caps |= NFS_CAP_CTIME;
2730 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2731 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2732#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2733 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2734 server->caps |= NFS_CAP_SECURITY_LABEL;
2735#endif
2736 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2737 sizeof(server->attr_bitmask));
62ab460c 2738
aa9c2669
DQ		 2739 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2740 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2741 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2742 }
a65318bf
TM		 2743 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2744 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2745 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2746 server->acl_bitmask = res.acl_bitmask;
264e6351 2747 server->fh_expire_type = res.fh_expire_type;
1da177e4 2748 }
cccef3b9 2749
1da177e4
LT		 2750 return status;
2751}
2752
55a97593 2753int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2754{
2755 struct nfs4_exception exception = { };
2756 int err;
2757 do {
2758 err = nfs4_handle_exception(server,
2759 _nfs4_server_capabilities(server, fhandle),
2760 &exception);
2761 } while (exception.retry);
2762 return err;
2763}
2764
2765static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2766 struct nfs_fsinfo *info)
2767{
aa9c2669 2768 u32 bitmask[3];
1da177e4 2769 struct nfs4_lookup_root_arg args = {
aa9c2669 2770 .bitmask = bitmask,
1da177e4
LT		 2771 };
2772 struct nfs4_lookup_res res = {
2773 .server = server,
0e574af1 2774 .fattr = info->fattr,
1da177e4
LT		 2775 .fh = fhandle,
2776 };
2777 struct rpc_message msg = {
2778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2779 .rpc_argp = &args,
2780 .rpc_resp = &res,
2781 };
008f55d0 2782
aa9c2669
DQ		 2783 bitmask[0] = nfs4_fattr_bitmap[0];
2784 bitmask[1] = nfs4_fattr_bitmap[1];
2785 /*
2786 * Process the label in the upcoming getfattr
2787 */
2788 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2789
0e574af1 2790 nfs_fattr_init(info->fattr);
7c513058 2791 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2792}
2793
2794static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2795 struct nfs_fsinfo *info)
2796{
2797 struct nfs4_exception exception = { };
2798 int err;
2799 do {
fb8a5ba8 2800 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2801 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2802 switch (err) {
2803 case 0:
2804 case -NFS4ERR_WRONGSEC:
05e9cfb4 2805 goto out;
fb8a5ba8
BS		 2806 default:
2807 err = nfs4_handle_exception(server, err, &exception);
2808 }
1da177e4 2809 } while (exception.retry);
05e9cfb4 2810out:
1da177e4
LT		 2811 return err;
2812}
2813
8f70e95f
BS		 2814static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2815 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2816{
c2190661
TM		 2817 struct rpc_auth_create_args auth_args = {
2818 .pseudoflavor = flavor,
2819 };
8f70e95f
BS		 2820 struct rpc_auth *auth;
2821 int ret;
2822
c2190661 2823 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2824 if (IS_ERR(auth)) {
75bc8821 2825 ret = -EACCES;
8f70e95f
BS		 2826 goto out;
2827 }
2828 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2829out:
2830 return ret;
2831}
2832
9a744ba3
CL		 2833/*
2834 * Retry pseudoroot lookup with various security flavors. We do this when:
2835 *
2836 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2837 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2838 *
2839 * Returns zero on success, or a negative NFS4ERR value, or a
2840 * negative errno value.
2841 */
801a16dc 2842static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2843 struct nfs_fsinfo *info)
1da177e4 2844{
9a744ba3
CL		 2845 /* Per 3530bis 15.33.5 */
2846 static const rpc_authflavor_t flav_array[] = {
2847 RPC_AUTH_GSS_KRB5P,
2848 RPC_AUTH_GSS_KRB5I,
2849 RPC_AUTH_GSS_KRB5,
c4eafe11 2850 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2851 RPC_AUTH_NULL,
2852 };
2853 int status = -EPERM;
2854 size_t i;
6a1a1e34 2855
9a744ba3 2856 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2857 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2858 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2859 continue;
2860 break;
8f70e95f 2861 }
9a744ba3 2862
fb8a5ba8
BS		 2863 /*
2864 * -EACCESS could mean that the user doesn't have correct permissions
2865 * to access the mount. It could also mean that we tried to mount
2866 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2867 * existing mount programs don't handle -EACCES very well so it should
2868 * be mapped to -EPERM instead.
2869 */
2870 if (status == -EACCES)
2871 status = -EPERM;
801a16dc
BS		 2872 return status;
2873}
2874
2ed4b95b
CL		 2875static int nfs4_do_find_root_sec(struct nfs_server *server,
2876 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2877{
2878 int mv = server->nfs_client->cl_minorversion;
2879 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2880}
2881
2882/**
2883 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2884 * @server: initialized nfs_server handle
2885 * @fhandle: we fill in the pseudo-fs root file handle
2886 * @info: we fill in an FSINFO struct
2887 *
2888 * Returns zero on success, or a negative errno.
801a16dc 2889 */
3028eb2b
BS		 2890int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2891 struct nfs_fsinfo *info)
801a16dc 2892{
2ed4b95b
CL		 2893 int status;
2894
2895 status = nfs4_lookup_root(server, fhandle, info);
2896 if ((status == -NFS4ERR_WRONGSEC) &&
2897 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2898 status = nfs4_do_find_root_sec(server, fhandle, info);
2899
1da177e4
LT		 2900 if (status == 0)
2901 status = nfs4_server_capabilities(server, fhandle);
2902 if (status == 0)
2903 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2904
c12e87f4 2905 return nfs4_map_errors(status);
1da177e4
LT		 2906}
2907
bae36241
BS		 2908static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2909 struct nfs_fsinfo *info)
2910{
2911 int error;
2912 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2913 struct nfs4_label *label = NULL;
bae36241
BS		 2914
2915 error = nfs4_server_capabilities(server, mntfh);
2916 if (error < 0) {
2917 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2918 return error;
2919 }
2920
14c43f76
DQ		 2921 label = nfs4_label_alloc(server, GFP_KERNEL);
2922 if (IS_ERR(label))
2923 return PTR_ERR(label);
2924
1775fd3e 2925 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2926 if (error < 0) {
2927 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2928 goto err_free_label;
bae36241
BS		 2929 }
2930
2931 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2932 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2933 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2934
14c43f76
DQ		 2935err_free_label:
2936 nfs4_label_free(label);
2937
bae36241
BS		 2938 return error;
2939}
2940
6b97fd3d
MN		 2941/*
2942 * Get locations and (maybe) other attributes of a referral.
2943 * Note that we'll actually follow the referral later when
2944 * we detect fsid mismatch in inode revalidation
2945 */
f05d147f
BS		 2946static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2947 const struct qstr *name, struct nfs_fattr *fattr,
2948 struct nfs_fh *fhandle)
6b97fd3d
MN		 2949{
2950 int status = -ENOMEM;
2951 struct page *page = NULL;
2952 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2953
2954 page = alloc_page(GFP_KERNEL);
2955 if (page == NULL)
2956 goto out;
2957 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2958 if (locations == NULL)
2959 goto out;
2960
f05d147f 2961 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2962 if (status != 0)
2963 goto out;
2964 /* Make sure server returned a different fsid for the referral */
2965 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2966 dprintk("%s: server did not return a different fsid for"
2967 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2968 status = -EIO;
2969 goto out;
2970 }
533eb461
AA		 2971 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2972 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2973
533eb461 2974 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2975 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2976 memset(fhandle, 0, sizeof(struct nfs_fh));
2977out:
2978 if (page)
2979 __free_page(page);
5d7ca35a 2980 kfree(locations);
6b97fd3d
MN		 2981 return status;
2982}
2983
1775fd3e
DQ		 2984static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2985 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2986{
2987 struct nfs4_getattr_arg args = {
2988 .fh = fhandle,
2989 .bitmask = server->attr_bitmask,
2990 };
2991 struct nfs4_getattr_res res = {
2992 .fattr = fattr,
1775fd3e 2993 .label = label,
1da177e4
LT		 2994 .server = server,
2995 };
2996 struct rpc_message msg = {
2997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2998 .rpc_argp = &args,
2999 .rpc_resp = &res,
3000 };
aa9c2669
DQ		 3001
3002 args.bitmask = nfs4_bitmask(server, label);
3003
0e574af1 3004 nfs_fattr_init(fattr);
7c513058 3005 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3006}
3007
1775fd3e
DQ		 3008static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3009 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3010{
3011 struct nfs4_exception exception = { };
3012 int err;
3013 do {
b5f875a9
TM		 3014 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3015 trace_nfs4_getattr(server, fhandle, fattr, err);
3016 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3017 &exception);
3018 } while (exception.retry);
3019 return err;
3020}
3021
3022/*
3023 * The file is not closed if it is opened due to the a request to change
3024 * the size of the file. The open call will not be needed once the
3025 * VFS layer lookup-intents are implemented.
3026 *
3027 * Close is called when the inode is destroyed.
3028 * If we haven't opened the file for O_WRONLY, we
3029 * need to in the size_change case to obtain a stateid.
3030 *
3031 * Got race?
3032 * Because OPEN is always done by name in nfsv4, it is
3033 * possible that we opened a different file by the same
3034 * name. We can recognize this race condition, but we
3035 * can't do anything about it besides returning an error.
3036 *
3037 * This will be fixed with VFS changes (lookup-intent).
3038 */
3039static int
3040nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3041 struct iattr *sattr)
3042{
08e9eac4 3043 struct inode *inode = dentry->d_inode;
659bfcd6 3044 struct rpc_cred *cred = NULL;
d530838b 3045 struct nfs4_state *state = NULL;
14c43f76 3046 struct nfs4_label *label = NULL;
1da177e4
LT		 3047 int status;
3048
8a1636c4 3049 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3050 pnfs_commit_and_return_layout(inode);
8a1636c4 3051
0e574af1 3052 nfs_fattr_init(fattr);
1da177e4 3053
2669940d
AA		 3054 /* Deal with open(O_TRUNC) */
3055 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3056 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3057
3058 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3059 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3060 return 0;
3061
d530838b 3062 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3063 if (sattr->ia_valid & ATTR_FILE) {
3064 struct nfs_open_context *ctx;
3065
3066 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3067 if (ctx) {
3068 cred = ctx->cred;
3069 state = ctx->state;
3070 }
659bfcd6 3071 }
08e9eac4 3072
14c43f76
DQ		 3073 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3074 if (IS_ERR(label))
3075 return PTR_ERR(label);
3076
3077 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3078 if (status == 0) {
65e4308d 3079 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3080 nfs_setsecurity(inode, fattr, label);
3081 }
14c43f76 3082 nfs4_label_free(label);
1da177e4
LT		 3083 return status;
3084}
3085
0c2e53f1
TM		 3086static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3087 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3088 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3089{
0c2e53f1 3090 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3091 int status;
3092 struct nfs4_lookup_arg args = {
3093 .bitmask = server->attr_bitmask,
0c2e53f1 3094 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3095 .name = name,
3096 };
3097 struct nfs4_lookup_res res = {
3098 .server = server,
3099 .fattr = fattr,
aa9c2669 3100 .label = label,
2b3de441
DH		 3101 .fh = fhandle,
3102 };
3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3105 .rpc_argp = &args,
3106 .rpc_resp = &res,
3107 };
3108
aa9c2669
DQ		 3109 args.bitmask = nfs4_bitmask(server, label);
3110
2b3de441
DH		 3111 nfs_fattr_init(fattr);
3112
1da177e4 3113 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3114 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3115 dprintk("NFS reply lookup: %d\n", status);
3116 return status;
3117}
3118
72de53ec 3119static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3120{
7ebb9315 3121 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3122 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3123 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3124 fattr->nlink = 2;
3125}
3126
72de53ec
BS		 3127static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3128 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3129 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3130{
3131 struct nfs4_exception exception = { };
72de53ec 3132 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3133 int err;
3134 do {
1775fd3e 3135 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3136 trace_nfs4_lookup(dir, name, err);
72de53ec 3137 switch (err) {
08ef7bd3 3138 case -NFS4ERR_BADNAME:
72de53ec
BS		 3139 err = -ENOENT;
3140 goto out;
0c2e53f1 3141 case -NFS4ERR_MOVED:
f05d147f 3142 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3143 goto out;
0c2e53f1 3144 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3145 err = -EPERM;
3146 if (client != *clnt)
3147 goto out;
3148
3149 client = nfs4_create_sec_client(client, dir, name);
3150 if (IS_ERR(client))
3151 return PTR_ERR(client);
3152
3153 exception.retry = 1;
3154 break;
3155 default:
3156 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3157 }
1da177e4 3158 } while (exception.retry);
72de53ec
BS		 3159
3160out:
3161 if (err == 0)
3162 *clnt = client;
3163 else if (client != *clnt)
3164 rpc_shutdown_client(client);
3165
1da177e4
LT		 3166 return err;
3167}
3168
80a16b21 3169static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3170 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3171 struct nfs4_label *label)
72de53ec
BS		 3172{
3173 int status;
3174 struct rpc_clnt *client = NFS_CLIENT(dir);
3175
1775fd3e 3176 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3177 if (client != NFS_CLIENT(dir)) {
3178 rpc_shutdown_client(client);
3179 nfs_fixup_secinfo_attributes(fattr);
3180 }
3181 return status;
3182}
3183
f05d147f
BS		 3184struct rpc_clnt *
3185nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3186 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3187{
3188 int status;
3189 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3190
1775fd3e 3191 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3192 if (status < 0) {
3193 rpc_shutdown_client(client);
3194 return ERR_PTR(status);
3195 }
3196 return client;
3197}
3198
1da177e4
LT		 3199static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3200{
76b32999 3201 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3202 struct nfs4_accessargs args = {
3203 .fh = NFS_FH(inode),
a4980e78 3204 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3205 };
3206 struct nfs4_accessres res = {
3207 .server = server,
1da177e4 3208 };
1da177e4
LT		 3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3211 .rpc_argp = &args,
3212 .rpc_resp = &res,
3213 .rpc_cred = entry->cred,
3214 };
3215 int mode = entry->mask;
aa9c2669 3216 int status = 0;
1da177e4
LT		 3217
3218 /*
3219 * Determine which access bits we want to ask for...
3220 */
3221 if (mode & MAY_READ)
3222 args.access |= NFS4_ACCESS_READ;
3223 if (S_ISDIR(inode->i_mode)) {
3224 if (mode & MAY_WRITE)
3225 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3226 if (mode & MAY_EXEC)
3227 args.access |= NFS4_ACCESS_LOOKUP;
3228 } else {
3229 if (mode & MAY_WRITE)
3230 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3231 if (mode & MAY_EXEC)
3232 args.access |= NFS4_ACCESS_EXECUTE;
3233 }
c407d41a
TM		 3234
3235 res.fattr = nfs_alloc_fattr();
3236 if (res.fattr == NULL)
3237 return -ENOMEM;
3238
7c513058 3239 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3240 if (!status) {
6168f62c 3241 nfs_access_set_mask(entry, res.access);
c407d41a 3242 nfs_refresh_inode(inode, res.fattr);
1da177e4 3243 }
c407d41a 3244 nfs_free_fattr(res.fattr);
1da177e4
LT		 3245 return status;
3246}
3247
3248static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3249{
3250 struct nfs4_exception exception = { };
3251 int err;
3252 do {
c1578b76
TM		 3253 err = _nfs4_proc_access(inode, entry);
3254 trace_nfs4_access(inode, err);
3255 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3256 &exception);
3257 } while (exception.retry);
3258 return err;
3259}
3260
3261/*
3262 * TODO: For the time being, we don't try to get any attributes
3263 * along with any of the zero-copy operations READ, READDIR,
3264 * READLINK, WRITE.
3265 *
3266 * In the case of the first three, we want to put the GETATTR
3267 * after the read-type operation -- this is because it is hard
3268 * to predict the length of a GETATTR response in v4, and thus
3269 * align the READ data correctly. This means that the GETATTR
3270 * may end up partially falling into the page cache, and we should
3271 * shift it into the 'tail' of the xdr_buf before processing.
3272 * To do this efficiently, we need to know the total length
3273 * of data received, which doesn't seem to be available outside
3274 * of the RPC layer.
3275 *
3276 * In the case of WRITE, we also want to put the GETATTR after
3277 * the operation -- in this case because we want to make sure
140150db 3278 * we get the post-operation mtime and size.
1da177e4
LT		 3279 *
3280 * Both of these changes to the XDR layer would in fact be quite
3281 * minor, but I decided to leave them for a subsequent patch.
3282 */
3283static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3284 unsigned int pgbase, unsigned int pglen)
3285{
3286 struct nfs4_readlink args = {
3287 .fh = NFS_FH(inode),
3288 .pgbase = pgbase,
3289 .pglen = pglen,
3290 .pages = &page,
3291 };
f50c7000 3292 struct nfs4_readlink_res res;
1da177e4
LT		 3293 struct rpc_message msg = {
3294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3295 .rpc_argp = &args,
f50c7000 3296 .rpc_resp = &res,
1da177e4
LT		 3297 };
3298
7c513058 3299 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3300}
3301
3302static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3303 unsigned int pgbase, unsigned int pglen)
3304{
3305 struct nfs4_exception exception = { };
3306 int err;
3307 do {
c1578b76
TM		 3308 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3309 trace_nfs4_readlink(inode, err);
3310 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3311 &exception);
3312 } while (exception.retry);
3313 return err;
3314}
3315
1da177e4 3316/*
8867fe58 3317 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3318 */
1da177e4
LT		 3319static int
3320nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3321 int flags)
1da177e4 3322{
aa9c2669 3323 struct nfs4_label l, *ilabel = NULL;
8867fe58 3324 struct nfs_open_context *ctx;
1da177e4 3325 struct nfs4_state *state;
1da177e4
LT		 3326 int status = 0;
3327
8867fe58
MS		 3328 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3329 if (IS_ERR(ctx))
3330 return PTR_ERR(ctx);
3331
aa9c2669
DQ		 3332 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3333
a8a5da99 3334 sattr->ia_mode &= ~current_umask();
959d921f 3335 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3336 if (IS_ERR(state)) {
3337 status = PTR_ERR(state);
c0204fd2 3338 goto out;
1da177e4 3339 }
1da177e4 3340out:
aa9c2669 3341 nfs4_label_release_security(ilabel);
8867fe58 3342 put_nfs_open_context(ctx);
1da177e4
LT		 3343 return status;
3344}
3345
3346static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3347{
16e42959 3348 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3349 struct nfs_removeargs args = {
1da177e4 3350 .fh = NFS_FH(dir),
26fe5750 3351 .name = *name,
16e42959 3352 };
4fdc17b2 3353 struct nfs_removeres res = {
16e42959 3354 .server = server,
1da177e4 3355 };
1da177e4 3356 struct rpc_message msg = {
4fdc17b2
TM		 3357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3358 .rpc_argp = &args,
3359 .rpc_resp = &res,
1da177e4 3360 };
778d2817 3361 int status;
1da177e4 3362
7c513058 3363 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3364 if (status == 0)
16e42959 3365 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3366 return status;
3367}
3368
3369static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3370{
3371 struct nfs4_exception exception = { };
3372 int err;
3373 do {
078ea3df
TM		 3374 err = _nfs4_proc_remove(dir, name);
3375 trace_nfs4_remove(dir, name, err);
3376 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3377 &exception);
3378 } while (exception.retry);
3379 return err;
3380}
3381
e4eff1a6 3382static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3383{
e4eff1a6
TM		 3384 struct nfs_server *server = NFS_SERVER(dir);
3385 struct nfs_removeargs *args = msg->rpc_argp;
3386 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3387
e4eff1a6 3388 res->server = server;
1da177e4 3389 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3390 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3391
3392 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3393}
3394
34e137cc
BS		 3395static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3396{
d9afbd1b
TM		 3397 nfs4_setup_sequence(NFS_SERVER(data->dir),
3398 &data->args.seq_args,
3399 &data->res.seq_res,
3400 task);
1da177e4
LT		 3401}
3402
e4eff1a6 3403static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3404{
078ea3df
TM		 3405 struct nfs_unlinkdata *data = task->tk_calldata;
3406 struct nfs_removeres *res = &data->res;
e4eff1a6 3407
14516c3a
TM		 3408 if (!nfs4_sequence_done(task, &res->seq_res))
3409 return 0;
9e33bed5 3410 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3411 return 0;
3412 update_changeattr(dir, &res->cinfo);
e4eff1a6 3413 return 1;
1da177e4
LT		 3414}
3415
d3d4152a
JL		 3416static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3417{
3418 struct nfs_server *server = NFS_SERVER(dir);
3419 struct nfs_renameargs *arg = msg->rpc_argp;
3420 struct nfs_renameres *res = msg->rpc_resp;
3421
3422 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3423 res->server = server;
a9c92d6b 3424 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3425}
3426
c6bfa1a1
BS		 3427static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3428{
d9afbd1b
TM		 3429 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3430 &data->args.seq_args,
3431 &data->res.seq_res,
3432 task);
d3d4152a
JL		 3433}
3434
3435static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3436 struct inode *new_dir)
3437{
fbc6f7c2
TM		 3438 struct nfs_renamedata *data = task->tk_calldata;
3439 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3440
3441 if (!nfs4_sequence_done(task, &res->seq_res))
3442 return 0;
3443 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3444 return 0;
3445
3446 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3447 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3448 return 1;
3449}
3450
1da177e4
LT		 3451static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3452 struct inode *new_dir, struct qstr *new_name)
3453{
6caf2c82 3454 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3455 struct nfs_renameargs arg = {
1da177e4
LT		 3456 .old_dir = NFS_FH(old_dir),
3457 .new_dir = NFS_FH(new_dir),
3458 .old_name = old_name,
3459 .new_name = new_name,
6caf2c82 3460 };
e8582a8b 3461 struct nfs_renameres res = {
6caf2c82 3462 .server = server,
1da177e4 3463 };
1da177e4
LT		 3464 struct rpc_message msg = {
3465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3466 .rpc_argp = &arg,
3467 .rpc_resp = &res,
3468 };
011fff72 3469 int status = -ENOMEM;
14c43f76 3470
7c513058 3471 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3472 if (!status) {
3473 update_changeattr(old_dir, &res.old_cinfo);
3474 update_changeattr(new_dir, &res.new_cinfo);
3475 }
3476 return status;
3477}
3478
3479static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3480 struct inode *new_dir, struct qstr *new_name)
3481{
3482 struct nfs4_exception exception = { };
3483 int err;
3484 do {
fbc6f7c2
TM		 3485 err = _nfs4_proc_rename(old_dir, old_name,
3486 new_dir, new_name);
3487 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3488 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3489 &exception);
3490 } while (exception.retry);
3491 return err;
3492}
3493
3494static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3495{
91ba2eee 3496 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3497 struct nfs4_link_arg arg = {
3498 .fh = NFS_FH(inode),
3499 .dir_fh = NFS_FH(dir),
3500 .name = name,
91ba2eee
TM		 3501 .bitmask = server->attr_bitmask,
3502 };
91ba2eee
TM		 3503 struct nfs4_link_res res = {
3504 .server = server,
1775fd3e 3505 .label = NULL,
1da177e4 3506 };
1da177e4
LT		 3507 struct rpc_message msg = {
3508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3509 .rpc_argp = &arg,
91ba2eee 3510 .rpc_resp = &res,
1da177e4 3511 };
136f2627
TM		 3512 int status = -ENOMEM;
3513
3514 res.fattr = nfs_alloc_fattr();
778d2817 3515 if (res.fattr == NULL)
136f2627 3516 goto out;
1da177e4 3517
14c43f76
DQ		 3518 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3519 if (IS_ERR(res.label)) {
3520 status = PTR_ERR(res.label);
3521 goto out;
3522 }
aa9c2669 3523 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3524
7c513058 3525 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3526 if (!status) {
3527 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3528 status = nfs_post_op_update_inode(inode, res.fattr);
3529 if (!status)
3530 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3531 }
14c43f76
DQ		 3532
3533
3534 nfs4_label_free(res.label);
3535
136f2627 3536out:
136f2627 3537 nfs_free_fattr(res.fattr);
1da177e4
LT		 3538 return status;
3539}
3540
3541static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3542{
3543 struct nfs4_exception exception = { };
3544 int err;
3545 do {
3546 err = nfs4_handle_exception(NFS_SERVER(inode),
3547 _nfs4_proc_link(inode, dir, name),
3548 &exception);
3549 } while (exception.retry);
3550 return err;
3551}
3552
57dc9a57
TM		 3553struct nfs4_createdata {
3554 struct rpc_message msg;
3555 struct nfs4_create_arg arg;
3556 struct nfs4_create_res res;
3557 struct nfs_fh fh;
3558 struct nfs_fattr fattr;
1775fd3e 3559 struct nfs4_label *label;
57dc9a57
TM		 3560};
3561
3562static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3563 struct qstr *name, struct iattr *sattr, u32 ftype)
3564{
3565 struct nfs4_createdata *data;
3566
3567 data = kzalloc(sizeof(*data), GFP_KERNEL);
3568 if (data != NULL) {
3569 struct nfs_server *server = NFS_SERVER(dir);
3570
14c43f76
DQ		 3571 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3572 if (IS_ERR(data->label))
3573 goto out_free;
3574
57dc9a57
TM		 3575 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3576 data->msg.rpc_argp = &data->arg;
3577 data->msg.rpc_resp = &data->res;
3578 data->arg.dir_fh = NFS_FH(dir);
3579 data->arg.server = server;
3580 data->arg.name = name;
3581 data->arg.attrs = sattr;
3582 data->arg.ftype = ftype;
aa9c2669 3583 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3584 data->res.server = server;
3585 data->res.fh = &data->fh;
3586 data->res.fattr = &data->fattr;
1775fd3e 3587 data->res.label = data->label;
57dc9a57 3588 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3589 }
3590 return data;
14c43f76
DQ		 3591out_free:
3592 kfree(data);
3593 return NULL;
57dc9a57
TM		 3594}
3595
3596static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3597{
7c513058 3598 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3599 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3600 if (status == 0) {
3601 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3602 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3603 }
3604 return status;
3605}
3606
3607static void nfs4_free_createdata(struct nfs4_createdata *data)
3608{
14c43f76 3609 nfs4_label_free(data->label);
57dc9a57
TM		 3610 kfree(data);
3611}
3612
4f390c15 3613static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3614 struct page *page, unsigned int len, struct iattr *sattr,
3615 struct nfs4_label *label)
1da177e4 3616{
57dc9a57
TM		 3617 struct nfs4_createdata *data;
3618 int status = -ENAMETOOLONG;
1da177e4 3619
94a6d753 3620 if (len > NFS4_MAXPATHLEN)
57dc9a57 3621 goto out;
4f390c15 3622
57dc9a57
TM		 3623 status = -ENOMEM;
3624 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3625 if (data == NULL)
3626 goto out;
3627
3628 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3629 data->arg.u.symlink.pages = &page;
3630 data->arg.u.symlink.len = len;
1775fd3e 3631 data->arg.label = label;
1da177e4 3632
57dc9a57
TM		 3633 status = nfs4_do_create(dir, dentry, data);
3634
3635 nfs4_free_createdata(data);
3636out:
1da177e4
LT		 3637 return status;
3638}
3639
4f390c15 3640static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3641 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3642{
3643 struct nfs4_exception exception = { };
aa9c2669 3644 struct nfs4_label l, *label = NULL;
1da177e4 3645 int err;
aa9c2669
DQ		 3646
3647 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3648
1da177e4 3649 do {
078ea3df
TM		 3650 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3651 trace_nfs4_symlink(dir, &dentry->d_name, err);
3652 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3653 &exception);
3654 } while (exception.retry);
aa9c2669
DQ		 3655
3656 nfs4_label_release_security(label);
1da177e4
LT		 3657 return err;
3658}
3659
3660static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3661 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3662{
57dc9a57
TM		 3663 struct nfs4_createdata *data;
3664 int status = -ENOMEM;
1da177e4 3665
57dc9a57
TM		 3666 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3667 if (data == NULL)
3668 goto out;
3669
1775fd3e 3670 data->arg.label = label;
57dc9a57
TM		 3671 status = nfs4_do_create(dir, dentry, data);
3672
3673 nfs4_free_createdata(data);
3674out:
1da177e4
LT		 3675 return status;
3676}
3677
3678static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3679 struct iattr *sattr)
3680{
3681 struct nfs4_exception exception = { };
aa9c2669 3682 struct nfs4_label l, *label = NULL;
1da177e4 3683 int err;
a8a5da99 3684
aa9c2669
DQ		 3685 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3686
a8a5da99 3687 sattr->ia_mode &= ~current_umask();
1da177e4 3688 do {
078ea3df
TM		 3689 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3690 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3691 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3692 &exception);
3693 } while (exception.retry);
aa9c2669
DQ		 3694 nfs4_label_release_security(label);
3695
1da177e4
LT		 3696 return err;
3697}
3698
3699static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3700 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3701{
3702 struct inode *dir = dentry->d_inode;
3703 struct nfs4_readdir_arg args = {
3704 .fh = NFS_FH(dir),
56e4ebf8 3705 .pages = pages,
1da177e4
LT		 3706 .pgbase = 0,
3707 .count = count,
96d25e53 3708 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3709 .plus = plus,
1da177e4
LT		 3710 };
3711 struct nfs4_readdir_res res;
3712 struct rpc_message msg = {
3713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3714 .rpc_argp = &args,
3715 .rpc_resp = &res,
3716 .rpc_cred = cred,
3717 };
3718 int status;
3719
3110ff80 3720 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3721 dentry->d_parent->d_name.name,
3722 dentry->d_name.name,
3723 (unsigned long long)cookie);
c3f52af3 3724 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3725 res.pgbase = args.pgbase;
7c513058 3726 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3727 if (status >= 0) {
c3f52af3 3728 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3729 status += args.pgbase;
3730 }
c4812998
TM		 3731
3732 nfs_invalidate_atime(dir);
3733
3110ff80 3734 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3735 return status;
3736}
3737
3738static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3739 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3740{
3741 struct nfs4_exception exception = { };
3742 int err;
3743 do {
c1578b76
TM		 3744 err = _nfs4_proc_readdir(dentry, cred, cookie,
3745 pages, count, plus);
3746 trace_nfs4_readdir(dentry->d_inode, err);
3747 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3748 &exception);
3749 } while (exception.retry);
3750 return err;
3751}
3752
3753static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3754 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3755{
57dc9a57
TM		 3756 struct nfs4_createdata *data;
3757 int mode = sattr->ia_mode;
3758 int status = -ENOMEM;
1da177e4 3759
57dc9a57
TM		 3760 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3761 if (data == NULL)
3762 goto out;
3763
1da177e4 3764 if (S_ISFIFO(mode))
57dc9a57 3765 data->arg.ftype = NF4FIFO;
1da177e4 3766 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3767 data->arg.ftype = NF4BLK;
3768 data->arg.u.device.specdata1 = MAJOR(rdev);
3769 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3770 }
3771 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3772 data->arg.ftype = NF4CHR;
3773 data->arg.u.device.specdata1 = MAJOR(rdev);
3774 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3775 } else if (!S_ISSOCK(mode)) {
3776 status = -EINVAL;
3777 goto out_free;
1da177e4 3778 }
1775fd3e 3779
aa9c2669 3780 data->arg.label = label;
57dc9a57 3781 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3782out_free:
57dc9a57
TM		 3783 nfs4_free_createdata(data);
3784out:
1da177e4
LT		 3785 return status;
3786}
3787
3788static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3789 struct iattr *sattr, dev_t rdev)
3790{
3791 struct nfs4_exception exception = { };
aa9c2669 3792 struct nfs4_label l, *label = NULL;
1da177e4 3793 int err;
a8a5da99 3794
aa9c2669
DQ		 3795 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3796
a8a5da99 3797 sattr->ia_mode &= ~current_umask();
1da177e4 3798 do {
078ea3df
TM		 3799 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3800 trace_nfs4_mknod(dir, &dentry->d_name, err);
3801 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3802 &exception);
3803 } while (exception.retry);
aa9c2669
DQ		 3804
3805 nfs4_label_release_security(label);
3806
1da177e4
LT		 3807 return err;
3808}
3809
3810static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3811 struct nfs_fsstat *fsstat)
3812{
3813 struct nfs4_statfs_arg args = {
3814 .fh = fhandle,
3815 .bitmask = server->attr_bitmask,
3816 };
24ad148a
BH		 3817 struct nfs4_statfs_res res = {
3818 .fsstat = fsstat,
3819 };
1da177e4
LT		 3820 struct rpc_message msg = {
3821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3822 .rpc_argp = &args,
24ad148a 3823 .rpc_resp = &res,
1da177e4
LT		 3824 };
3825
0e574af1 3826 nfs_fattr_init(fsstat->fattr);
7c513058 3827 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3828}
3829
3830static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3831{
3832 struct nfs4_exception exception = { };
3833 int err;
3834 do {
3835 err = nfs4_handle_exception(server,
3836 _nfs4_proc_statfs(server, fhandle, fsstat),
3837 &exception);
3838 } while (exception.retry);
3839 return err;
3840}
3841
3842static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3843 struct nfs_fsinfo *fsinfo)
3844{
3845 struct nfs4_fsinfo_arg args = {
3846 .fh = fhandle,
3847 .bitmask = server->attr_bitmask,
3848 };
3dda5e43
BH		 3849 struct nfs4_fsinfo_res res = {
3850 .fsinfo = fsinfo,
3851 };
1da177e4
LT		 3852 struct rpc_message msg = {
3853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3854 .rpc_argp = &args,
3dda5e43 3855 .rpc_resp = &res,
1da177e4
LT		 3856 };
3857
7c513058 3858 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3859}
3860
3861static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3862{
3863 struct nfs4_exception exception = { };
83ca7f5a 3864 unsigned long now = jiffies;
1da177e4
LT		 3865 int err;
3866
3867 do {
83ca7f5a 3868 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3869 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3870 if (err == 0) {
3871 struct nfs_client *clp = server->nfs_client;
3872
3873 spin_lock(&clp->cl_lock);
3874 clp->cl_lease_time = fsinfo->lease_time * HZ;
3875 clp->cl_last_renewal = now;
3876 spin_unlock(&clp->cl_lock);
3877 break;
3878 }
3879 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3880 } while (exception.retry);
3881 return err;
3882}
3883
3884static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3885{
e38eb650
BS		 3886 int error;
3887
0e574af1 3888 nfs_fattr_init(fsinfo->fattr);
e38eb650 3889 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3890 if (error == 0) {
3891 /* block layout checks this! */
3892 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3893 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3894 }
e38eb650
BS		 3895
3896 return error;
1da177e4
LT		 3897}
3898
3899static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3900 struct nfs_pathconf *pathconf)
3901{
3902 struct nfs4_pathconf_arg args = {
3903 .fh = fhandle,
3904 .bitmask = server->attr_bitmask,
3905 };
d45b2989
BH		 3906 struct nfs4_pathconf_res res = {
3907 .pathconf = pathconf,
3908 };
1da177e4
LT		 3909 struct rpc_message msg = {
3910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3911 .rpc_argp = &args,
d45b2989 3912 .rpc_resp = &res,
1da177e4
LT		 3913 };
3914
3915 /* None of the pathconf attributes are mandatory to implement */
3916 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3917 memset(pathconf, 0, sizeof(*pathconf));
3918 return 0;
3919 }
3920
0e574af1 3921 nfs_fattr_init(pathconf->fattr);
7c513058 3922 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
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_exception exception = { };
3929 int err;
3930
3931 do {
3932 err = nfs4_handle_exception(server,
3933 _nfs4_proc_pathconf(server, fhandle, pathconf),
3934 &exception);
3935 } while (exception.retry);
3936 return err;
3937}
3938
5521abfd 3939int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3940 const struct nfs_open_context *ctx,
3941 const struct nfs_lock_context *l_ctx,
3942 fmode_t fmode)
3943{
3944 const struct nfs_lockowner *lockowner = NULL;
3945
3946 if (l_ctx != NULL)
3947 lockowner = &l_ctx->lockowner;
5521abfd 3948 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3949}
3950EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3951
5521abfd
TM		 3952static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3953 const struct nfs_open_context *ctx,
3954 const struct nfs_lock_context *l_ctx,
3955 fmode_t fmode)
3956{
3957 nfs4_stateid current_stateid;
3958
3959 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3960 return false;
3961 return nfs4_stateid_match(stateid, &current_stateid);
3962}
3963
3964static bool nfs4_error_stateid_expired(int err)
3965{
3966 switch (err) {
3967 case -NFS4ERR_DELEG_REVOKED:
3968 case -NFS4ERR_ADMIN_REVOKED:
3969 case -NFS4ERR_BAD_STATEID:
3970 case -NFS4ERR_STALE_STATEID:
3971 case -NFS4ERR_OLD_STATEID:
3972 case -NFS4ERR_OPENMODE:
3973 case -NFS4ERR_EXPIRED:
3974 return true;
3975 }
3976 return false;
3977}
3978
d20581aa
BH		 3979void __nfs4_read_done_cb(struct nfs_read_data *data)
3980{
cd841605 3981 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3982}
3983
cbdabc7f 3984static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3985{
cd841605 3986 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3987
cc668ab3 3988 trace_nfs4_read(data, task->tk_status);
9e33bed5 3989 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3990 rpc_restart_call_prepare(task);
ec06c096 3991 return -EAGAIN;
1da177e4 3992 }
8850df99 3993
d20581aa 3994 __nfs4_read_done_cb(data);
1da177e4 3995 if (task->tk_status > 0)
ec06c096
TM		 3996 renew_lease(server, data->timestamp);
3997 return 0;
1da177e4
LT		 3998}
3999
5521abfd
TM		 4000static bool nfs4_read_stateid_changed(struct rpc_task *task,
4001 struct nfs_readargs *args)
4002{
4003
4004 if (!nfs4_error_stateid_expired(task->tk_status) ||
4005 nfs4_stateid_is_current(&args->stateid,
4006 args->context,
4007 args->lock_context,
4008 FMODE_READ))
4009 return false;
4010 rpc_restart_call_prepare(task);
4011 return true;
4012}
4013
cbdabc7f
AA		 4014static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4015{
4016
4017 dprintk("--> %s\n", __func__);
4018
4019 if (!nfs4_sequence_done(task, &data->res.seq_res))
4020 return -EAGAIN;
5521abfd
TM		 4021 if (nfs4_read_stateid_changed(task, &data->args))
4022 return -EAGAIN;
d20581aa
BH		 4023 return data->read_done_cb ? data->read_done_cb(task, data) :
4024 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4025}
4026
bdc7f021 4027static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4028{
1da177e4 4029 data->timestamp = jiffies;
cbdabc7f 4030 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4031 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4032 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4033}
4034
ef1820f9 4035static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4036{
9b206149 4037 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4038 &data->args.seq_args,
4039 &data->res.seq_res,
9b206149 4040 task))
ef1820f9
N		 4041 return 0;
4042 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4043 data->args.lock_context, FMODE_READ) == -EIO)
4044 return -EIO;
4045 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4046 return -EIO;
4047 return 0;
1da177e4
LT		 4048}
4049
b029bc9b 4050static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4051{
cd841605 4052 struct inode *inode = data->header->inode;
1da177e4 4053
cc668ab3 4054 trace_nfs4_write(data, task->tk_status);
9e33bed5 4055 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4056 rpc_restart_call_prepare(task);
788e7a89 4057 return -EAGAIN;
1da177e4 4058 }
4f9838c7 4059 if (task->tk_status >= 0) {
1da177e4 4060 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4061 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4062 }
788e7a89 4063 return 0;
1da177e4
LT		 4064}
4065
5521abfd
TM		 4066static bool nfs4_write_stateid_changed(struct rpc_task *task,
4067 struct nfs_writeargs *args)
4068{
4069
4070 if (!nfs4_error_stateid_expired(task->tk_status) ||
4071 nfs4_stateid_is_current(&args->stateid,
4072 args->context,
4073 args->lock_context,
4074 FMODE_WRITE))
4075 return false;
4076 rpc_restart_call_prepare(task);
4077 return true;
4078}
4079
b029bc9b
FI		 4080static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4081{
4082 if (!nfs4_sequence_done(task, &data->res.seq_res))
4083 return -EAGAIN;
5521abfd
TM		 4084 if (nfs4_write_stateid_changed(task, &data->args))
4085 return -EAGAIN;
d20581aa
BH		 4086 return data->write_done_cb ? data->write_done_cb(task, data) :
4087 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4088}
4089
5a37f851
TM		 4090static
4091bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4092{
5a37f851
TM		 4093 const struct nfs_pgio_header *hdr = data->header;
4094
4095 /* Don't request attributes for pNFS or O_DIRECT writes */
4096 if (data->ds_clp != NULL || hdr->dreq != NULL)
4097 return false;
4098 /* Otherwise, request attributes if and only if we don't hold
4099 * a delegation
4100 */
011e2a7f 4101 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4102}
a69aef14 4103
bdc7f021 4104static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4105{
cd841605 4106 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4107
5a37f851 4108 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4109 data->args.bitmask = NULL;
4110 data->res.fattr = NULL;
4111 } else
4112 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4113
b029bc9b
FI		 4114 if (!data->write_done_cb)
4115 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4116 data->res.server = server;
1da177e4
LT		 4117 data->timestamp = jiffies;
4118
bdc7f021 4119 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4120 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4121}
4122
ef1820f9 4123static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4124{
9b206149 4125 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4126 &data->args.seq_args,
4127 &data->res.seq_res,
9b206149 4128 task))
ef1820f9
N		 4129 return 0;
4130 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4131 data->args.lock_context, FMODE_WRITE) == -EIO)
4132 return -EIO;
4133 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4134 return -EIO;
4135 return 0;
1da177e4
LT		 4136}
4137
0b7c0153 4138static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4139{
d9afbd1b
TM		 4140 nfs4_setup_sequence(NFS_SERVER(data->inode),
4141 &data->args.seq_args,
4142 &data->res.seq_res,
4143 task);
1da177e4
LT		 4144}
4145
0b7c0153 4146static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4147{
1da177e4 4148 struct inode *inode = data->inode;
14516c3a 4149
cc668ab3 4150 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4151 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4152 rpc_restart_call_prepare(task);
788e7a89 4153 return -EAGAIN;
1da177e4 4154 }
788e7a89 4155 return 0;
1da177e4
LT		 4156}
4157
0b7c0153 4158static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4159{
4160 if (!nfs4_sequence_done(task, &data->res.seq_res))
4161 return -EAGAIN;
0b7c0153 4162 return data->commit_done_cb(task, data);
5f452431
FI		 4163}
4164
0b7c0153 4165static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4166{
788e7a89 4167 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4168
0b7c0153
FI		 4169 if (data->commit_done_cb == NULL)
4170 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4171 data->res.server = server;
bdc7f021 4172 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4173 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4174}
4175
9bc4e3ca
CL		 4176struct nfs4_renewdata {
4177 struct nfs_client *client;
4178 unsigned long timestamp;
4179};
4180
1da177e4
LT		 4181/*
4182 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4183 * standalone procedure for queueing an asynchronous RENEW.
4184 */
9bc4e3ca 4185static void nfs4_renew_release(void *calldata)
dc96aef9 4186{
9bc4e3ca
CL		 4187 struct nfs4_renewdata *data = calldata;
4188 struct nfs_client *clp = data->client;
dc96aef9 4189
0851de06
AB		 4190 if (atomic_read(&clp->cl_count) > 1)
4191 nfs4_schedule_state_renewal(clp);
4192 nfs_put_client(clp);
9bc4e3ca 4193 kfree(data);
dc96aef9
AB		 4194}
4195
9bc4e3ca 4196static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4197{
9bc4e3ca
CL		 4198 struct nfs4_renewdata *data = calldata;
4199 struct nfs_client *clp = data->client;
4200 unsigned long timestamp = data->timestamp;
1da177e4 4201
c6d01c6f 4202 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4203 if (task->tk_status < 0) {
95baa25c 4204 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4205 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4206 return;
4207 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4208 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4209 return;
4210 }
4211 nfs4_schedule_path_down_recovery(clp);
1da177e4 4212 }
452e9352 4213 do_renew_lease(clp, timestamp);
1da177e4
LT		 4214}
4215
963d8fe5
TM		 4216static const struct rpc_call_ops nfs4_renew_ops = {
4217 .rpc_call_done = nfs4_renew_done,
dc96aef9 4218 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4219};
4220
2f60ea6b 4221static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4222{
4223 struct rpc_message msg = {
4224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4225 .rpc_argp = clp,
b4454fe1 4226 .rpc_cred = cred,
1da177e4 4227 };
9bc4e3ca 4228 struct nfs4_renewdata *data;
1da177e4 4229
2f60ea6b
TM		 4230 if (renew_flags == 0)
4231 return 0;
0851de06
AB		 4232 if (!atomic_inc_not_zero(&clp->cl_count))
4233 return -EIO;
b569ad34 4234 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4235 if (data == NULL)
4236 return -ENOMEM;
4237 data->client = clp;
4238 data->timestamp = jiffies;
bc7a05ca 4239 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4240 &nfs4_renew_ops, data);
1da177e4
LT		 4241}
4242
8534d4ec 4243static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4244{
4245 struct rpc_message msg = {
4246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4247 .rpc_argp = clp,
b4454fe1 4248 .rpc_cred = cred,
1da177e4
LT		 4249 };
4250 unsigned long now = jiffies;
4251 int status;
4252
bc7a05ca 4253 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4254 if (status < 0)
4255 return status;
452e9352 4256 do_renew_lease(clp, now);
1da177e4
LT		 4257 return 0;
4258}
4259
aa1870af
BF		 4260static inline int nfs4_server_supports_acls(struct nfs_server *server)
4261{
4262 return (server->caps & NFS_CAP_ACLS)
4263 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4264 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4265}
4266
21f498c2
TM		 4267/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4268 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4269 * the stack.
4270 */
21f498c2 4271#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4272
e9e3d724
NH		 4273static int buf_to_pages_noslab(const void *buf, size_t buflen,
4274 struct page **pages, unsigned int *pgbase)
4275{
4276 struct page *newpage, **spages;
4277 int rc = 0;
4278 size_t len;
4279 spages = pages;
4280
4281 do {
21f498c2 4282 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4283 newpage = alloc_page(GFP_KERNEL);
4284
4285 if (newpage == NULL)
4286 goto unwind;
4287 memcpy(page_address(newpage), buf, len);
4288 buf += len;
4289 buflen -= len;
4290 *pages++ = newpage;
4291 rc++;
4292 } while (buflen != 0);
4293
4294 return rc;
4295
4296unwind:
4297 for(; rc > 0; rc--)
4298 __free_page(spages[rc-1]);
4299 return -ENOMEM;
4300}
4301
e50a1c2e
BF		 4302struct nfs4_cached_acl {
4303 int cached;
4304 size_t len;
3e9d4154 4305 char data[0];
e50a1c2e
BF		 4306};
4307
4308static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4309{
4310 struct nfs_inode *nfsi = NFS_I(inode);
4311
4312 spin_lock(&inode->i_lock);
4313 kfree(nfsi->nfs4_acl);
4314 nfsi->nfs4_acl = acl;
4315 spin_unlock(&inode->i_lock);
4316}
4317
4318static void nfs4_zap_acl_attr(struct inode *inode)
4319{
4320 nfs4_set_cached_acl(inode, NULL);
4321}
4322
4323static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4324{
4325 struct nfs_inode *nfsi = NFS_I(inode);
4326 struct nfs4_cached_acl *acl;
4327 int ret = -ENOENT;
4328
4329 spin_lock(&inode->i_lock);
4330 acl = nfsi->nfs4_acl;
4331 if (acl == NULL)
4332 goto out;
4333 if (buf == NULL) /* user is just asking for length */
4334 goto out_len;
4335 if (acl->cached == 0)
4336 goto out;
4337 ret = -ERANGE; /* see getxattr(2) man page */
4338 if (acl->len > buflen)
4339 goto out;
4340 memcpy(buf, acl->data, acl->len);
4341out_len:
4342 ret = acl->len;
4343out:
4344 spin_unlock(&inode->i_lock);
4345 return ret;
4346}
4347
5794d21e 4348static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4349{
4350 struct nfs4_cached_acl *acl;
b291f1b1 4351 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4352
1f1ea6c2 4353 if (buflen <= PAGE_SIZE) {
b291f1b1 4354 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4355 if (acl == NULL)
4356 goto out;
4357 acl->cached = 1;
5794d21e 4358 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4359 } else {
4360 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4361 if (acl == NULL)
4362 goto out;
4363 acl->cached = 0;
4364 }
4365 acl->len = acl_len;
4366out:
4367 nfs4_set_cached_acl(inode, acl);
4368}
4369
bf118a34
AA		 4370/*
4371 * The getxattr API returns the required buffer length when called with a
4372 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4373 * the required buf. On a NULL buf, we send a page of data to the server
4374 * guessing that the ACL request can be serviced by a page. If so, we cache
4375 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4376 * the cache. If not so, we throw away the page, and cache the required
4377 * length. The next getxattr call will then produce another round trip to
4378 * the server, this time with the input buf of the required size.
4379 */
16b4289c 4380static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4381{
bf118a34 4382 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4383 struct nfs_getaclargs args = {
4384 .fh = NFS_FH(inode),
4385 .acl_pages = pages,
4386 .acl_len = buflen,
4387 };
663c79b3
BH		 4388 struct nfs_getaclres res = {
4389 .acl_len = buflen,
4390 };
aa1870af
BF		 4391 struct rpc_message msg = {
4392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4393 .rpc_argp = &args,
663c79b3 4394 .rpc_resp = &res,
aa1870af 4395 };
21f498c2
TM		 4396 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4397 int ret = -ENOMEM, i;
aa1870af 4398
bf118a34
AA		 4399 /* As long as we're doing a round trip to the server anyway,
4400 * let's be prepared for a page of acl data. */
4401 if (npages == 0)
4402 npages = 1;
21f498c2
TM		 4403 if (npages > ARRAY_SIZE(pages))
4404 return -ERANGE;
5a006899 4405
bf118a34
AA		 4406 for (i = 0; i < npages; i++) {
4407 pages[i] = alloc_page(GFP_KERNEL);
4408 if (!pages[i])
4409 goto out_free;
e50a1c2e 4410 }
5a006899
SP		 4411
4412 /* for decoding across pages */
4413 res.acl_scratch = alloc_page(GFP_KERNEL);
4414 if (!res.acl_scratch)
4415 goto out_free;
4416
bf118a34
AA		 4417 args.acl_len = npages * PAGE_SIZE;
4418 args.acl_pgbase = 0;
5a006899 4419
de040bec 4420 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4421 __func__, buf, buflen, npages, args.acl_len);
4422 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4423 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4424 if (ret)
4425 goto out_free;
bf118a34 4426
1f1ea6c2
TM		 4427 /* Handle the case where the passed-in buffer is too short */
4428 if (res.acl_flags & NFS4_ACL_TRUNC) {
4429 /* Did the user only issue a request for the acl length? */
4430 if (buf == NULL)
4431 goto out_ok;
e50a1c2e 4432 ret = -ERANGE;
1f1ea6c2 4433 goto out_free;
e50a1c2e 4434 }
1f1ea6c2 4435 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4436 if (buf) {
4437 if (res.acl_len > buflen) {
4438 ret = -ERANGE;
4439 goto out_free;
4440 }
1f1ea6c2 4441 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4442 }
1f1ea6c2
TM		 4443out_ok:
4444 ret = res.acl_len;
e50a1c2e 4445out_free:
bf118a34
AA		 4446 for (i = 0; i < npages; i++)
4447 if (pages[i])
4448 __free_page(pages[i]);
331818f1
TM		 4449 if (res.acl_scratch)
4450 __free_page(res.acl_scratch);
aa1870af
BF		 4451 return ret;
4452}
4453
16b4289c
TM		 4454static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4455{
4456 struct nfs4_exception exception = { };
4457 ssize_t ret;
4458 do {
4459 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4460 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4461 if (ret >= 0)
4462 break;
4463 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4464 } while (exception.retry);
4465 return ret;
4466}
4467
e50a1c2e
BF		 4468static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4469{
4470 struct nfs_server *server = NFS_SERVER(inode);
4471 int ret;
4472
4473 if (!nfs4_server_supports_acls(server))
4474 return -EOPNOTSUPP;
4475 ret = nfs_revalidate_inode(server, inode);
4476 if (ret < 0)
4477 return ret;
08a22b39
AK		 4478 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4479 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4480 ret = nfs4_read_cached_acl(inode, buf, buflen);
4481 if (ret != -ENOENT)
bf118a34
AA		 4482 /* -ENOENT is returned if there is no ACL or if there is an ACL
4483 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4484 return ret;
4485 return nfs4_get_acl_uncached(inode, buf, buflen);
4486}
4487
16b4289c 4488static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4489{
4490 struct nfs_server *server = NFS_SERVER(inode);
4491 struct page *pages[NFS4ACL_MAXPAGES];
4492 struct nfs_setaclargs arg = {
4493 .fh = NFS_FH(inode),
4494 .acl_pages = pages,
4495 .acl_len = buflen,
4496 };
73c403a9 4497 struct nfs_setaclres res;
4b580ee3
BF		 4498 struct rpc_message msg = {
4499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4500 .rpc_argp = &arg,
73c403a9 4501 .rpc_resp = &res,
4b580ee3 4502 };
21f498c2 4503 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4504 int ret, i;
4b580ee3
BF		 4505
4506 if (!nfs4_server_supports_acls(server))
4507 return -EOPNOTSUPP;
21f498c2
TM		 4508 if (npages > ARRAY_SIZE(pages))
4509 return -ERANGE;
e9e3d724
NH		 4510 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4511 if (i < 0)
4512 return i;
57ec14c5 4513 nfs4_inode_return_delegation(inode);
7c513058 4514 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4515
4516 /*
4517 * Free each page after tx, so the only ref left is
4518 * held by the network stack
4519 */
4520 for (; i > 0; i--)
4521 put_page(pages[i-1]);
4522
08a22b39
AK		 4523 /*
4524 * Acl update can result in inode attribute update.
4525 * so mark the attribute cache invalid.
4526 */
4527 spin_lock(&inode->i_lock);
4528 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4529 spin_unlock(&inode->i_lock);
f41f7418
TM		 4530 nfs_access_zap_cache(inode);
4531 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4532 return ret;
4533}
4534
16b4289c
TM		 4535static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4536{
4537 struct nfs4_exception exception = { };
4538 int err;
4539 do {
c1578b76
TM		 4540 err = __nfs4_proc_set_acl(inode, buf, buflen);
4541 trace_nfs4_set_acl(inode, err);
4542 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4543 &exception);
4544 } while (exception.retry);
4545 return err;
4546}
4547
aa9c2669
DQ		 4548#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4549static int _nfs4_get_security_label(struct inode *inode, void *buf,
4550 size_t buflen)
4551{
4552 struct nfs_server *server = NFS_SERVER(inode);
4553 struct nfs_fattr fattr;
4554 struct nfs4_label label = {0, 0, buflen, buf};
4555
4556 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4557 struct nfs4_getattr_arg args = {
4558 .fh = NFS_FH(inode),
4559 .bitmask = bitmask,
4560 };
4561 struct nfs4_getattr_res res = {
4562 .fattr = &fattr,
4563 .label = &label,
4564 .server = server,
4565 };
4566 struct rpc_message msg = {
4567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4568 .rpc_argp = &args,
4569 .rpc_resp = &res,
4570 };
4571 int ret;
4572
4573 nfs_fattr_init(&fattr);
4574
4575 ret = rpc_call_sync(server->client, &msg, 0);
4576 if (ret)
4577 return ret;
4578 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4579 return -ENOENT;
4580 if (buflen < label.len)
4581 return -ERANGE;
4582 return 0;
4583}
4584
4585static int nfs4_get_security_label(struct inode *inode, void *buf,
4586 size_t buflen)
4587{
4588 struct nfs4_exception exception = { };
4589 int err;
4590
4591 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4592 return -EOPNOTSUPP;
4593
4594 do {
c1578b76
TM		 4595 err = _nfs4_get_security_label(inode, buf, buflen);
4596 trace_nfs4_get_security_label(inode, err);
4597 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4598 &exception);
4599 } while (exception.retry);
4600 return err;
4601}
4602
4603static int _nfs4_do_set_security_label(struct inode *inode,
4604 struct nfs4_label *ilabel,
4605 struct nfs_fattr *fattr,
4606 struct nfs4_label *olabel)
4607{
4608
4609 struct iattr sattr = {0};
4610 struct nfs_server *server = NFS_SERVER(inode);
4611 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4612 struct nfs_setattrargs args = {
4613 .fh = NFS_FH(inode),
4614 .iap = &sattr,
4615 .server = server,
4616 .bitmask = bitmask,
4617 .label = ilabel,
4618 };
4619 struct nfs_setattrres res = {
4620 .fattr = fattr,
4621 .label = olabel,
4622 .server = server,
4623 };
4624 struct rpc_message msg = {
4625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4626 .rpc_argp = &args,
4627 .rpc_resp = &res,
4628 };
4629 int status;
4630
4631 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4632
4633 status = rpc_call_sync(server->client, &msg, 0);
4634 if (status)
4635 dprintk("%s failed: %d\n", __func__, status);
4636
4637 return status;
4638}
4639
4640static int nfs4_do_set_security_label(struct inode *inode,
4641 struct nfs4_label *ilabel,
4642 struct nfs_fattr *fattr,
4643 struct nfs4_label *olabel)
4644{
4645 struct nfs4_exception exception = { };
4646 int err;
4647
4648 do {
c1578b76
TM		 4649 err = _nfs4_do_set_security_label(inode, ilabel,
4650 fattr, olabel);
4651 trace_nfs4_set_security_label(inode, err);
4652 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4653 &exception);
4654 } while (exception.retry);
4655 return err;
4656}
4657
4658static int
4659nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4660{
4661 struct nfs4_label ilabel, *olabel = NULL;
4662 struct nfs_fattr fattr;
4663 struct rpc_cred *cred;
4664 struct inode *inode = dentry->d_inode;
4665 int status;
4666
4667 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4668 return -EOPNOTSUPP;
4669
4670 nfs_fattr_init(&fattr);
4671
4672 ilabel.pi = 0;
4673 ilabel.lfs = 0;
4674 ilabel.label = (char *)buf;
4675 ilabel.len = buflen;
4676
4677 cred = rpc_lookup_cred();
4678 if (IS_ERR(cred))
4679 return PTR_ERR(cred);
4680
4681 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4682 if (IS_ERR(olabel)) {
4683 status = -PTR_ERR(olabel);
4684 goto out;
4685 }
4686
4687 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4688 if (status == 0)
4689 nfs_setsecurity(inode, &fattr, olabel);
4690
4691 nfs4_label_free(olabel);
4692out:
4693 put_rpccred(cred);
4694 return status;
4695}
4696#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4697
4698
1da177e4 4699static int
aa5190d0 4700nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4701{
aa5190d0
TM		 4702 struct nfs_client *clp = server->nfs_client;
4703
4704 if (task->tk_status >= 0)
1da177e4
LT		 4705 return 0;
4706 switch(task->tk_status) {
a1d0b5ee 4707 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4708 case -NFS4ERR_ADMIN_REVOKED:
4709 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4710 if (state == NULL)
4711 break;
4712 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4713 case -NFS4ERR_OPENMODE:
4714 if (state == NULL)
4715 break;
5d422301
TM		 4716 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4717 goto stateid_invalid;
0400a6b0 4718 goto wait_on_recovery;
0ced63d1 4719 case -NFS4ERR_EXPIRED:
5d422301
TM		 4720 if (state != NULL) {
4721 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4722 goto stateid_invalid;
4723 }
1da177e4 4724 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4725 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4726 nfs4_schedule_lease_recovery(clp);
4727 goto wait_on_recovery;
4745e315
AA		 4728#if defined(CONFIG_NFS_V4_1)
4729 case -NFS4ERR_BADSESSION:
4730 case -NFS4ERR_BADSLOT:
4731 case -NFS4ERR_BAD_HIGH_SLOT:
4732 case -NFS4ERR_DEADSESSION:
4733 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4734 case -NFS4ERR_SEQ_FALSE_RETRY:
4735 case -NFS4ERR_SEQ_MISORDERED:
4736 dprintk("%s ERROR %d, Reset session\n", __func__,
4737 task->tk_status);
9f594791 4738 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4739 task->tk_status = 0;
4740 return -EAGAIN;
4741#endif /* CONFIG_NFS_V4_1 */
1da177e4 4742 case -NFS4ERR_DELAY:
aa5190d0 4743 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4744 case -NFS4ERR_GRACE:
1da177e4
LT		 4745 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4746 task->tk_status = 0;
4747 return -EAGAIN;
a8a4ae3a 4748 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4749 case -NFS4ERR_OLD_STATEID:
4750 task->tk_status = 0;
4751 return -EAGAIN;
4752 }
4753 task->tk_status = nfs4_map_errors(task->tk_status);
4754 return 0;
5d422301
TM		 4755stateid_invalid:
4756 task->tk_status = -EIO;
4757 return 0;
0400a6b0 4758wait_on_recovery:
a2c0b9e2 4759 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4760 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4761 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4762 task->tk_status = 0;
4763 return -EAGAIN;
1da177e4
LT		 4764}
4765
f092075d
CL		 4766static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4767 nfs4_verifier *bootverf)
cd93710e
CL		 4768{
4769 __be32 verf[2];
4770
2c820d9a
CL		 4771 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4772 /* An impossible timestamp guarantees this value
4773 * will never match a generated boot time. */
4774 verf[0] = 0;
17f26b12 4775 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4776 } else {
f092075d 4777 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4778 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4779 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4780 }
cd93710e
CL		 4781 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4782}
4783
e984a55a
CL		 4784static unsigned int
4785nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4786 char *buf, size_t len)
4787{
4788 unsigned int result;
4789
4790 rcu_read_lock();
4791 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4792 clp->cl_ipaddr,
4793 rpc_peeraddr2str(clp->cl_rpcclient,
4794 RPC_DISPLAY_ADDR),
4795 rpc_peeraddr2str(clp->cl_rpcclient,
4796 RPC_DISPLAY_PROTO));
4797 rcu_read_unlock();
4798 return result;
4799}
4800
4801static unsigned int
4802nfs4_init_uniform_client_string(const struct nfs_client *clp,
4803 char *buf, size_t len)
4804{
55b59293 4805 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4806
4807 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4808 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4809 clp->rpc_ops->version,
4810 clp->cl_minorversion,
4811 nfs4_client_id_uniquifier,
4812 nodename);
e984a55a
CL		 4813 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4814 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4815 nodename);
e984a55a
CL		 4816}
4817
6bbb4ae8
CL		 4818/**
4819 * nfs4_proc_setclientid - Negotiate client ID
4820 * @clp: state data structure
4821 * @program: RPC program for NFSv4 callback service
4822 * @port: IP port number for NFS4 callback service
4823 * @cred: RPC credential to use for this call
4824 * @res: where to place the result
4825 *
4826 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4827 */
bb8b27e5
TM		 4828int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4829 unsigned short port, struct rpc_cred *cred,
4830 struct nfs4_setclientid_res *res)
1da177e4
LT		 4831{
4832 nfs4_verifier sc_verifier;
4833 struct nfs4_setclientid setclientid = {
4834 .sc_verifier = &sc_verifier,
4835 .sc_prog = program,
f4eecd5d 4836 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4837 };
4838 struct rpc_message msg = {
4839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4840 .rpc_argp = &setclientid,
bb8b27e5 4841 .rpc_resp = res,
286d7d6a 4842 .rpc_cred = cred,
1da177e4 4843 };
6bbb4ae8 4844 int status;
1da177e4 4845
de734831 4846 /* nfs_client_id4 */
f092075d 4847 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4848 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4849 setclientid.sc_name_len =
4850 nfs4_init_uniform_client_string(clp,
4851 setclientid.sc_name,
4852 sizeof(setclientid.sc_name));
4853 else
4854 setclientid.sc_name_len =
4855 nfs4_init_nonuniform_client_string(clp,
4856 setclientid.sc_name,
4857 sizeof(setclientid.sc_name));
de734831 4858 /* cb_client4 */
e984a55a 4859 rcu_read_lock();
de734831 4860 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4861 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4862 rpc_peeraddr2str(clp->cl_rpcclient,
4863 RPC_DISPLAY_NETID));
de734831
CL		 4864 rcu_read_unlock();
4865 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4866 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4867 clp->cl_ipaddr, port >> 8, port & 255);
4868
6bbb4ae8
CL		 4869 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4870 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4871 setclientid.sc_name_len, setclientid.sc_name);
4872 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4873 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4874 dprintk("NFS reply setclientid: %d\n", status);
4875 return status;
1da177e4
LT		 4876}
4877
6bbb4ae8
CL		 4878/**
4879 * nfs4_proc_setclientid_confirm - Confirm client ID
4880 * @clp: state data structure
4881 * @res: result of a previous SETCLIENTID
4882 * @cred: RPC credential to use for this call
4883 *
4884 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4885 */
fd954ae1 4886int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4887 struct nfs4_setclientid_res *arg,
4888 struct rpc_cred *cred)
1da177e4 4889{
1da177e4
LT		 4890 struct rpc_message msg = {
4891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4892 .rpc_argp = arg,
286d7d6a 4893 .rpc_cred = cred,
1da177e4 4894 };
1da177e4
LT		 4895 int status;
4896
6bbb4ae8
CL		 4897 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4898 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4899 clp->cl_clientid);
1bd714f2 4900 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4901 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4902 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4903 return status;
4904}
4905
fe650407
TM		 4906struct nfs4_delegreturndata {
4907 struct nfs4_delegreturnargs args;
fa178f29 4908 struct nfs4_delegreturnres res;
fe650407
TM		 4909 struct nfs_fh fh;
4910 nfs4_stateid stateid;
26e976a8 4911 unsigned long timestamp;
fa178f29 4912 struct nfs_fattr fattr;
fe650407
TM		 4913 int rpc_status;
4914};
4915
fe650407
TM		 4916static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4917{
4918 struct nfs4_delegreturndata *data = calldata;
938e1010 4919
14516c3a
TM		 4920 if (!nfs4_sequence_done(task, &data->res.seq_res))
4921 return;
938e1010 4922
ca8acf8d 4923 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4924 switch (task->tk_status) {
4925 case -NFS4ERR_STALE_STATEID:
4926 case -NFS4ERR_EXPIRED:
4927 case 0:
fa178f29 4928 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4929 break;
4930 default:
4931 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4932 -EAGAIN) {
d00c5d43 4933 rpc_restart_call_prepare(task);
79708861
RL		 4934 return;
4935 }
4936 }
4937 data->rpc_status = task->tk_status;
fe650407
TM		 4938}
4939
4940static void nfs4_delegreturn_release(void *calldata)
4941{
fe650407
TM		 4942 kfree(calldata);
4943}
4944
938e1010
AA		 4945static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4946{
4947 struct nfs4_delegreturndata *d_data;
4948
4949 d_data = (struct nfs4_delegreturndata *)data;
4950
d9afbd1b
TM		 4951 nfs4_setup_sequence(d_data->res.server,
4952 &d_data->args.seq_args,
4953 &d_data->res.seq_res,
4954 task);
938e1010 4955}
938e1010 4956
c8d149f3 4957static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4958 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4959 .rpc_call_done = nfs4_delegreturn_done,
4960 .rpc_release = nfs4_delegreturn_release,
4961};
4962
e6f81075 4963static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4964{
4965 struct nfs4_delegreturndata *data;
fa178f29 4966 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4967 struct rpc_task *task;
5138fde0
TM		 4968 struct rpc_message msg = {
4969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4970 .rpc_cred = cred,
4971 };
c970aa85
TM		 4972 struct rpc_task_setup task_setup_data = {
4973 .rpc_client = server->client,
5138fde0 4974 .rpc_message = &msg,
c970aa85
TM		 4975 .callback_ops = &nfs4_delegreturn_ops,
4976 .flags = RPC_TASK_ASYNC,
4977 };
e6f81075 4978 int status = 0;
fe650407 4979
8535b2be 4980 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4981 if (data == NULL)
4982 return -ENOMEM;
a9c92d6b 4983 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4984 data->args.fhandle = &data->fh;
4985 data->args.stateid = &data->stateid;
9e907fec 4986 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4987 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4988 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4989 data->res.fattr = &data->fattr;
4990 data->res.server = server;
5138fde0 4991 nfs_fattr_init(data->res.fattr);
26e976a8 4992 data->timestamp = jiffies;
fe650407
TM		 4993 data->rpc_status = 0;
4994
c970aa85 4995 task_setup_data.callback_data = data;
1174dd1f
TM		 4996 msg.rpc_argp = &data->args;
4997 msg.rpc_resp = &data->res;
c970aa85 4998 task = rpc_run_task(&task_setup_data);
7a1218a2 4999 if (IS_ERR(task))
fe650407 5000 return PTR_ERR(task);
e6f81075
TM		 5001 if (!issync)
5002 goto out;
fe650407 5003 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5004 if (status != 0)
5005 goto out;
5006 status = data->rpc_status;
e144cbcc
TM		 5007 if (status == 0)
5008 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5009 else
5010 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5011out:
e6b3c4db 5012 rpc_put_task(task);
fe650407 5013 return status;
1da177e4
LT		 5014}
5015
e6f81075 5016int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5017{
5018 struct nfs_server *server = NFS_SERVER(inode);
5019 struct nfs4_exception exception = { };
5020 int err;
5021 do {
e6f81075 5022 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5023 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5024 switch (err) {
5025 case -NFS4ERR_STALE_STATEID:
5026 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5027 case 0:
5028 return 0;
5029 }
5030 err = nfs4_handle_exception(server, err, &exception);
5031 } while (exception.retry);
5032 return err;
5033}
5034
5035#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5036#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5037
5038/*
5039 * sleep, with exponential backoff, and retry the LOCK operation.
5040 */
5041static unsigned long
5042nfs4_set_lock_task_retry(unsigned long timeout)
5043{
416ad3c9 5044 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5045 timeout <<= 1;
5046 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5047 return NFS4_LOCK_MAXTIMEOUT;
5048 return timeout;
5049}
5050
1da177e4
LT		 5051static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5052{
5053 struct inode *inode = state->inode;
5054 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5055 struct nfs_client *clp = server->nfs_client;
911d1aaf 5056 struct nfs_lockt_args arg = {
1da177e4 5057 .fh = NFS_FH(inode),
911d1aaf 5058 .fl = request,
1da177e4 5059 };
911d1aaf
TM		 5060 struct nfs_lockt_res res = {
5061 .denied = request,
1da177e4
LT		 5062 };
5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5065 .rpc_argp = &arg,
5066 .rpc_resp = &res,
5067 .rpc_cred = state->owner->so_cred,
5068 };
1da177e4
LT		 5069 struct nfs4_lock_state *lsp;
5070 int status;
5071
911d1aaf 5072 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5073 status = nfs4_set_lock_state(state, request);
5074 if (status != 0)
5075 goto out;
5076 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5077 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5078 arg.lock_owner.s_dev = server->s_dev;
7c513058 5079 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5080 switch (status) {
5081 case 0:
5082 request->fl_type = F_UNLCK;
5083 break;
5084 case -NFS4ERR_DENIED:
5085 status = 0;
1da177e4 5086 }
70cc6487 5087 request->fl_ops->fl_release_private(request);
8d0a8a9d 5088out:
1da177e4
LT		 5089 return status;
5090}
5091
5092static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5093{
5094 struct nfs4_exception exception = { };
5095 int err;
5096
5097 do {
d1b748a5
TM		 5098 err = _nfs4_proc_getlk(state, cmd, request);
5099 trace_nfs4_get_lock(request, state, cmd, err);
5100 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5101 &exception);
5102 } while (exception.retry);
5103 return err;
5104}
5105
5106static int do_vfs_lock(struct file *file, struct file_lock *fl)
5107{
5108 int res = 0;
5109 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5110 case FL_POSIX:
5111 res = posix_lock_file_wait(file, fl);
5112 break;
5113 case FL_FLOCK:
5114 res = flock_lock_file_wait(file, fl);
5115 break;
5116 default:
5117 BUG();
5118 }
1da177e4
LT		 5119 return res;
5120}
5121
faf5f49c 5122struct nfs4_unlockdata {
911d1aaf
TM		 5123 struct nfs_locku_args arg;
5124 struct nfs_locku_res res;
faf5f49c
TM		 5125 struct nfs4_lock_state *lsp;
5126 struct nfs_open_context *ctx;
911d1aaf
TM		 5127 struct file_lock fl;
5128 const struct nfs_server *server;
26e976a8 5129 unsigned long timestamp;
faf5f49c
TM		 5130};
5131
911d1aaf
TM		 5132static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5133 struct nfs_open_context *ctx,
5134 struct nfs4_lock_state *lsp,
5135 struct nfs_seqid *seqid)
5136{
5137 struct nfs4_unlockdata *p;
5138 struct inode *inode = lsp->ls_state->inode;
5139
8535b2be 5140 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5141 if (p == NULL)
5142 return NULL;
5143 p->arg.fh = NFS_FH(inode);
5144 p->arg.fl = &p->fl;
5145 p->arg.seqid = seqid;
c1d51931 5146 p->res.seqid = seqid;
911d1aaf
TM		 5147 p->arg.stateid = &lsp->ls_stateid;
5148 p->lsp = lsp;
5149 atomic_inc(&lsp->ls_count);
5150 /* Ensure we don't close file until we're done freeing locks! */
5151 p->ctx = get_nfs_open_context(ctx);
5152 memcpy(&p->fl, fl, sizeof(p->fl));
5153 p->server = NFS_SERVER(inode);
5154 return p;
5155}
5156
06f814a3 5157static void nfs4_locku_release_calldata(void *data)
faf5f49c 5158{
963d8fe5 5159 struct nfs4_unlockdata *calldata = data;
911d1aaf 5160 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5161 nfs4_put_lock_state(calldata->lsp);
5162 put_nfs_open_context(calldata->ctx);
5163 kfree(calldata);
faf5f49c
TM		 5164}
5165
963d8fe5 5166static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5167{
963d8fe5 5168 struct nfs4_unlockdata *calldata = data;
faf5f49c 5169
14516c3a
TM		 5170 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5171 return;
faf5f49c
TM		 5172 switch (task->tk_status) {
5173 case 0:
f597c537
TM		 5174 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5175 &calldata->res.stateid);
26e976a8 5176 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5177 break;
9e33bed5
TM		 5178 case -NFS4ERR_BAD_STATEID:
5179 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5180 case -NFS4ERR_STALE_STATEID:
5181 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5182 break;
5183 default:
9e33bed5 5184 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5185 rpc_restart_call_prepare(task);
faf5f49c 5186 }
2b1bc308 5187 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5188}
5189
4ce70ada 5190static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5191{
4ce70ada 5192 struct nfs4_unlockdata *calldata = data;
faf5f49c 5193
911d1aaf 5194 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5195 goto out_wait;
795a88c9 5196 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5197 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5198 goto out_no_action;
faf5f49c 5199 }
26e976a8 5200 calldata->timestamp = jiffies;
035168ab 5201 if (nfs4_setup_sequence(calldata->server,
a893693c 5202 &calldata->arg.seq_args,
2240a9e2
TM		 5203 &calldata->res.seq_res,
5204 task) != 0)
5205 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5206 return;
5207out_no_action:
5208 task->tk_action = NULL;
5209out_wait:
5210 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5211}
5212
963d8fe5 5213static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5214 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5215 .rpc_call_done = nfs4_locku_done,
06f814a3 5216 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5217};
5218
a5d16a4d
TM		 5219static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5220 struct nfs_open_context *ctx,
5221 struct nfs4_lock_state *lsp,
5222 struct nfs_seqid *seqid)
5223{
5224 struct nfs4_unlockdata *data;
5138fde0
TM		 5225 struct rpc_message msg = {
5226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5227 .rpc_cred = ctx->cred,
5228 };
c970aa85
TM		 5229 struct rpc_task_setup task_setup_data = {
5230 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5231 .rpc_message = &msg,
c970aa85 5232 .callback_ops = &nfs4_locku_ops,
101070ca 5233 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5234 .flags = RPC_TASK_ASYNC,
5235 };
a5d16a4d 5236
fa940720
WAA		 5237 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5238 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5239
137d6aca
FF		 5240 /* Ensure this is an unlock - when canceling a lock, the
5241 * canceled lock is passed in, and it won't be an unlock.
5242 */
5243 fl->fl_type = F_UNLCK;
5244
a5d16a4d
TM		 5245 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5246 if (data == NULL) {
5247 nfs_free_seqid(seqid);
5248 return ERR_PTR(-ENOMEM);
5249 }
5250
a9c92d6b 5251 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5252 msg.rpc_argp = &data->arg;
5253 msg.rpc_resp = &data->res;
c970aa85
TM		 5254 task_setup_data.callback_data = data;
5255 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5256}
5257
faf5f49c
TM		 5258static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5259{
65b62a29
TM		 5260 struct inode *inode = state->inode;
5261 struct nfs4_state_owner *sp = state->owner;
5262 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5263 struct nfs_seqid *seqid;
1da177e4 5264 struct nfs4_lock_state *lsp;
06f814a3
TM		 5265 struct rpc_task *task;
5266 int status = 0;
536ff0f8 5267 unsigned char fl_flags = request->fl_flags;
faf5f49c 5268
8d0a8a9d 5269 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5270 /* Unlock _before_ we do the RPC call */
5271 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5272 /* Exclude nfs_delegation_claim_locks() */
5273 mutex_lock(&sp->so_delegreturn_mutex);
5274 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5275 down_read(&nfsi->rwsem);
5276 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5277 up_read(&nfsi->rwsem);
65b62a29 5278 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5279 goto out;
19e03c57
TM		 5280 }
5281 up_read(&nfsi->rwsem);
65b62a29 5282 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5283 if (status != 0)
9b073574
TM		 5284 goto out;
5285 /* Is this a delegated lock? */
8d0a8a9d 5286 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5287 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5288 goto out;
8535b2be 5289 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5290 status = -ENOMEM;
911d1aaf 5291 if (seqid == NULL)
9b073574 5292 goto out;
cd3758e3 5293 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5294 status = PTR_ERR(task);
5295 if (IS_ERR(task))
9b073574 5296 goto out;
a5d16a4d 5297 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5298 rpc_put_task(task);
9b073574 5299out:
536ff0f8 5300 request->fl_flags = fl_flags;
d1b748a5 5301 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5302 return status;
5303}
5304
a5d16a4d
TM		 5305struct nfs4_lockdata {
5306 struct nfs_lock_args arg;
5307 struct nfs_lock_res res;
5308 struct nfs4_lock_state *lsp;
5309 struct nfs_open_context *ctx;
5310 struct file_lock fl;
26e976a8 5311 unsigned long timestamp;
a5d16a4d
TM		 5312 int rpc_status;
5313 int cancelled;
66179efe 5314 struct nfs_server *server;
a5d16a4d
TM		 5315};
5316
5317static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5318 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5319 gfp_t gfp_mask)
1da177e4 5320{
a5d16a4d
TM		 5321 struct nfs4_lockdata *p;
5322 struct inode *inode = lsp->ls_state->inode;
1da177e4 5323 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5324
8535b2be 5325 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5326 if (p == NULL)
5327 return NULL;
5328
5329 p->arg.fh = NFS_FH(inode);
5330 p->arg.fl = &p->fl;
8535b2be 5331 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5332 if (p->arg.open_seqid == NULL)
5333 goto out_free;
8535b2be 5334 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5335 if (p->arg.lock_seqid == NULL)
2f74c0a0 5336 goto out_free_seqid;
a5d16a4d 5337 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5338 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5339 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5340 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5341 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5342 p->lsp = lsp;
66179efe 5343 p->server = server;
a5d16a4d
TM		 5344 atomic_inc(&lsp->ls_count);
5345 p->ctx = get_nfs_open_context(ctx);
5346 memcpy(&p->fl, fl, sizeof(p->fl));
5347 return p;
2f74c0a0
TM		 5348out_free_seqid:
5349 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5350out_free:
5351 kfree(p);
5352 return NULL;
5353}
5354
5355static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5356{
5357 struct nfs4_lockdata *data = calldata;
5358 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5359
3110ff80 5360 dprintk("%s: begin!\n", __func__);
2f74c0a0 5361 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5362 goto out_wait;
a5d16a4d
TM		 5363 /* Do we need to do an open_to_lock_owner? */
5364 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5365 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5366 goto out_release_lock_seqid;
8fe72bac 5367 }
8e472f33 5368 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5369 data->arg.new_lock_owner = 1;
c1d51931 5370 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5371 } else
5372 data->arg.new_lock_owner = 0;
5d422301
TM		 5373 if (!nfs4_valid_open_stateid(state)) {
5374 data->rpc_status = -EBADF;
5375 task->tk_action = NULL;
5376 goto out_release_open_seqid;
5377 }
26e976a8 5378 data->timestamp = jiffies;
035168ab
TM		 5379 if (nfs4_setup_sequence(data->server,
5380 &data->arg.seq_args,
2240a9e2 5381 &data->res.seq_res,
d9afbd1b 5382 task) == 0)
66179efe 5383 return;
5d422301 5384out_release_open_seqid:
2240a9e2
TM		 5385 nfs_release_seqid(data->arg.open_seqid);
5386out_release_lock_seqid:
5387 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5388out_wait:
5389 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5390 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5391}
5392
a5d16a4d
TM		 5393static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5394{
5395 struct nfs4_lockdata *data = calldata;
5396
3110ff80 5397 dprintk("%s: begin!\n", __func__);
a5d16a4d 5398
14516c3a
TM		 5399 if (!nfs4_sequence_done(task, &data->res.seq_res))
5400 return;
66179efe 5401
a5d16a4d 5402 data->rpc_status = task->tk_status;
a5d16a4d 5403 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5404 if (data->rpc_status == 0)
5405 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5406 else
5407 goto out;
5408 }
5409 if (data->rpc_status == 0) {
f597c537 5410 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5411 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5412 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5413 }
a5d16a4d 5414out:
3110ff80 5415 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5416}
5417
5418static void nfs4_lock_release(void *calldata)
5419{
5420 struct nfs4_lockdata *data = calldata;
5421
3110ff80 5422 dprintk("%s: begin!\n", __func__);
2f74c0a0 5423 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5424 if (data->cancelled != 0) {
5425 struct rpc_task *task;
5426 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5427 data->arg.lock_seqid);
5428 if (!IS_ERR(task))
bf294b41 5429 rpc_put_task_async(task);
3110ff80 5430 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5431 } else
5432 nfs_free_seqid(data->arg.lock_seqid);
5433 nfs4_put_lock_state(data->lsp);
5434 put_nfs_open_context(data->ctx);
5435 kfree(data);
3110ff80 5436 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5437}
5438
5439static const struct rpc_call_ops nfs4_lock_ops = {
5440 .rpc_call_prepare = nfs4_lock_prepare,
5441 .rpc_call_done = nfs4_lock_done,
5442 .rpc_release = nfs4_lock_release,
5443};
5444
2bee72a6
TM		 5445static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5446{
2bee72a6
TM		 5447 switch (error) {
5448 case -NFS4ERR_ADMIN_REVOKED:
5449 case -NFS4ERR_BAD_STATEID:
ecac799a 5450 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5451 if (new_lock_owner != 0 ||
795a88c9 5452 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5453 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5454 break;
5455 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5456 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5457 case -NFS4ERR_EXPIRED:
5458 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5459 };
5460}
5461
afe6c27c 5462static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5463{
5464 struct nfs4_lockdata *data;
5465 struct rpc_task *task;
5138fde0
TM		 5466 struct rpc_message msg = {
5467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5468 .rpc_cred = state->owner->so_cred,
5469 };
c970aa85
TM		 5470 struct rpc_task_setup task_setup_data = {
5471 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5472 .rpc_message = &msg,
c970aa85 5473 .callback_ops = &nfs4_lock_ops,
101070ca 5474 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5475 .flags = RPC_TASK_ASYNC,
5476 };
a5d16a4d
TM		 5477 int ret;
5478
3110ff80 5479 dprintk("%s: begin!\n", __func__);
cd3758e3 5480 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5481 fl->fl_u.nfs4_fl.owner,
5482 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5483 if (data == NULL)
5484 return -ENOMEM;
5485 if (IS_SETLKW(cmd))
5486 data->arg.block = 1;
a9c92d6b 5487 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5488 msg.rpc_argp = &data->arg;
5489 msg.rpc_resp = &data->res;
c970aa85 5490 task_setup_data.callback_data = data;
8fe72bac
TM		 5491 if (recovery_type > NFS_LOCK_NEW) {
5492 if (recovery_type == NFS_LOCK_RECLAIM)
5493 data->arg.reclaim = NFS_LOCK_RECLAIM;
5494 nfs4_set_sequence_privileged(&data->arg.seq_args);
5495 }
c970aa85 5496 task = rpc_run_task(&task_setup_data);
7a1218a2 5497 if (IS_ERR(task))
a5d16a4d 5498 return PTR_ERR(task);
a5d16a4d
TM		 5499 ret = nfs4_wait_for_completion_rpc_task(task);
5500 if (ret == 0) {
5501 ret = data->rpc_status;
2bee72a6
TM		 5502 if (ret)
5503 nfs4_handle_setlk_error(data->server, data->lsp,
5504 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5505 } else
5506 data->cancelled = 1;
e6b3c4db 5507 rpc_put_task(task);
3110ff80 5508 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5509 return ret;
1da177e4
LT		 5510}
5511
5512static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5513{
202b50dc 5514 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5515 struct nfs4_exception exception = {
5516 .inode = state->inode,
5517 };
202b50dc
TM		 5518 int err;
5519
5520 do {
42a2d13e
TM		 5521 /* Cache the lock if possible... */
5522 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5523 return 0;
afe6c27c 5524 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5525 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5526 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5527 break;
5528 nfs4_handle_exception(server, err, &exception);
5529 } while (exception.retry);
5530 return err;
1da177e4
LT		 5531}
5532
5533static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5534{
202b50dc 5535 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5536 struct nfs4_exception exception = {
5537 .inode = state->inode,
5538 };
202b50dc
TM		 5539 int err;
5540
6bfc93ef
TM		 5541 err = nfs4_set_lock_state(state, request);
5542 if (err != 0)
5543 return err;
f6de7a39 5544 if (!recover_lost_locks) {
ef1820f9
N		 5545 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5546 return 0;
5547 }
202b50dc 5548 do {
42a2d13e
TM		 5549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5550 return 0;
afe6c27c 5551 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5552 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5553 switch (err) {
5554 default:
5555 goto out;
5556 case -NFS4ERR_GRACE:
5557 case -NFS4ERR_DELAY:
5558 nfs4_handle_exception(server, err, &exception);
5559 err = 0;
5560 }
202b50dc 5561 } while (exception.retry);
a9ed2e25 5562out:
202b50dc 5563 return err;
1da177e4
LT		 5564}
5565
f062eb6c 5566#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5567/**
5568 * nfs41_check_expired_locks - possibly free a lock stateid
5569 *
5570 * @state: NFSv4 state for an inode
5571 *
5572 * Returns NFS_OK if recovery for this stateid is now finished.
5573 * Otherwise a negative NFS4ERR value is returned.
5574 */
b01dd1d8 5575static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5576{
eb64cf96 5577 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5578 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5579 struct nfs_server *server = NFS_SERVER(state->inode);
5580
b01dd1d8 5581 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5582 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5583 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5584
5585 status = nfs41_test_stateid(server,
5586 &lsp->ls_stateid,
5587 cred);
08cb47fa 5588 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5589 if (status != NFS_OK) {
3e60ffdd
CL		 5590 /* Free the stateid unless the server
5591 * informs us the stateid is unrecognized. */
89af2739
CL		 5592 if (status != -NFS4ERR_BAD_STATEID)
5593 nfs41_free_stateid(server,
ab7cb0df
TM		 5594 &lsp->ls_stateid,
5595 cred);
795a88c9 5596 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5597 ret = status;
5598 }
5599 }
5600 };
5601
5602 return ret;
5603}
5604
5605static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5606{
5607 int status = NFS_OK;
5608
5609 if (test_bit(LK_STATE_IN_USE, &state->flags))
5610 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5611 if (status != NFS_OK)
5612 status = nfs4_lock_expired(state, request);
5613 return status;
f062eb6c
BS		 5614}
5615#endif
5616
1da177e4
LT		 5617static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5618{
9a99af49 5619 struct nfs4_state_owner *sp = state->owner;
19e03c57 5620 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5621 unsigned char fl_flags = request->fl_flags;
9a99af49 5622 unsigned int seq;
8e469ebd 5623 int status = -ENOLCK;
1da177e4 5624
8e469ebd
TM		 5625 if ((fl_flags & FL_POSIX) &&
5626 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5627 goto out;
6bfc93ef 5628 /* Is this a delegated open? */
6bfc93ef
TM		 5629 status = nfs4_set_lock_state(state, request);
5630 if (status != 0)
5631 goto out;
01c3b861
TM		 5632 request->fl_flags |= FL_ACCESS;
5633 status = do_vfs_lock(request->fl_file, request);
5634 if (status < 0)
5635 goto out;
19e03c57 5636 down_read(&nfsi->rwsem);
01c3b861 5637 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5638 /* Yes: cache locks! */
01c3b861 5639 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5640 request->fl_flags = fl_flags & ~FL_SLEEP;
5641 status = do_vfs_lock(request->fl_file, request);
5642 goto out_unlock;
01c3b861 5643 }
9a99af49
TM		 5644 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5645 up_read(&nfsi->rwsem);
afe6c27c 5646 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5647 if (status != 0)
9a99af49
TM		 5648 goto out;
5649 down_read(&nfsi->rwsem);
5650 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5651 status = -NFS4ERR_DELAY;
01c3b861 5652 goto out_unlock;
9a99af49 5653 }
6bfc93ef 5654 /* Note: we always want to sleep here! */
01c3b861 5655 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5656 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5657 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5658 "manager!\n", __func__);
01c3b861 5659out_unlock:
19e03c57 5660 up_read(&nfsi->rwsem);
01c3b861
TM		 5661out:
5662 request->fl_flags = fl_flags;
1da177e4
LT		 5663 return status;
5664}
5665
5666static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5667{
a1d0b5ee
TM		 5668 struct nfs4_exception exception = {
5669 .state = state,
05ffe24f 5670 .inode = state->inode,
a1d0b5ee 5671 };
1da177e4
LT		 5672 int err;
5673
5674 do {
965b5d67 5675 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5676 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5677 if (err == -NFS4ERR_DENIED)
5678 err = -EAGAIN;
1da177e4 5679 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5680 err, &exception);
1da177e4
LT		 5681 } while (exception.retry);
5682 return err;
5683}
5684
5685static int
5686nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5687{
5688 struct nfs_open_context *ctx;
5689 struct nfs4_state *state;
5690 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5691 int status;
5692
5693 /* verify open state */
cd3758e3 5694 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5695 state = ctx->state;
5696
5697 if (request->fl_start < 0 || request->fl_end < 0)
5698 return -EINVAL;
5699
d953126a
TM		 5700 if (IS_GETLK(cmd)) {
5701 if (state != NULL)
5702 return nfs4_proc_getlk(state, F_GETLK, request);
5703 return 0;
5704 }
1da177e4
LT		 5705
5706 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5707 return -EINVAL;
5708
d953126a
TM		 5709 if (request->fl_type == F_UNLCK) {
5710 if (state != NULL)
5711 return nfs4_proc_unlck(state, cmd, request);
5712 return 0;
5713 }
1da177e4 5714
d953126a
TM		 5715 if (state == NULL)
5716 return -ENOLCK;
55725513
TM		 5717 /*
5718 * Don't rely on the VFS having checked the file open mode,
5719 * since it won't do this for flock() locks.
5720 */
f44106e2 5721 switch (request->fl_type) {
55725513
TM		 5722 case F_RDLCK:
5723 if (!(filp->f_mode & FMODE_READ))
5724 return -EBADF;
5725 break;
5726 case F_WRLCK:
5727 if (!(filp->f_mode & FMODE_WRITE))
5728 return -EBADF;
5729 }
5730
1da177e4
LT		 5731 do {
5732 status = nfs4_proc_setlk(state, cmd, request);
5733 if ((status != -EAGAIN) || IS_SETLK(cmd))
5734 break;
5735 timeout = nfs4_set_lock_task_retry(timeout);
5736 status = -ERESTARTSYS;
5737 if (signalled())
5738 break;
5739 } while(status < 0);
1da177e4
LT		 5740 return status;
5741}
5742
db4f2e63 5743int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5744{
5745 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5746 int err;
5747
5748 err = nfs4_set_lock_state(state, fl);
5749 if (err != 0)
db4f2e63 5750 return err;
4a706fa0 5751 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5752 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5753}
6b3b5496 5754
cf470c3e
TM		 5755struct nfs_release_lockowner_data {
5756 struct nfs4_lock_state *lsp;
5ae67c4f 5757 struct nfs_server *server;
cf470c3e 5758 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5759 struct nfs4_sequence_args seq_args;
5760 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5761};
5762
fbd4bfd1
CL		 5763static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5764{
5765 struct nfs_release_lockowner_data *data = calldata;
5766 nfs40_setup_sequence(data->server,
5767 &data->seq_args, &data->seq_res, task);
5768}
5769
5770static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5771{
5772 struct nfs_release_lockowner_data *data = calldata;
5773 nfs40_sequence_done(task, &data->seq_res);
5774}
5775
d3c7b7cc
TM		 5776static void nfs4_release_lockowner_release(void *calldata)
5777{
cf470c3e 5778 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5779 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5780 kfree(calldata);
5781}
5782
17280175 5783static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5784 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5785 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5786 .rpc_release = nfs4_release_lockowner_release,
5787};
5788
c8b2d0bf 5789static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5790{
cf470c3e 5791 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5792 struct rpc_message msg = {
5793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5794 };
5795
5796 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5797 return -EINVAL;
fbd4bfd1 5798
cf470c3e
TM		 5799 data = kmalloc(sizeof(*data), GFP_NOFS);
5800 if (!data)
5801 return -ENOMEM;
fbd4bfd1 5802 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5803 data->lsp = lsp;
5ae67c4f 5804 data->server = server;
cf470c3e
TM		 5805 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5806 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5807 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5808
cf470c3e
TM		 5809 msg.rpc_argp = &data->args;
5810 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5811 return 0;
d3c7b7cc
TM		 5812}
5813
aa1870af
BF		 5814#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5815
64c2ce8b
AK		 5816static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5817 const void *buf, size_t buflen,
5818 int flags, int type)
6b3b5496 5819{
64c2ce8b
AK		 5820 if (strcmp(key, "") != 0)
5821 return -EINVAL;
4b580ee3 5822
64c2ce8b 5823 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5824}
5825
64c2ce8b
AK		 5826static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5827 void *buf, size_t buflen, int type)
6b3b5496 5828{
64c2ce8b
AK		 5829 if (strcmp(key, "") != 0)
5830 return -EINVAL;
aa1870af 5831
64c2ce8b 5832 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5833}
5834
64c2ce8b
AK		 5835static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5836 size_t list_len, const char *name,
5837 size_t name_len, int type)
6b3b5496 5838{
64c2ce8b 5839 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5840
096455a2
BF		 5841 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5842 return 0;
64c2ce8b
AK		 5843
5844 if (list && len <= list_len)
5845 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5846 return len;
6b3b5496
BF		 5847}
5848
c9bccef6
DQ		 5849#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5850static inline int nfs4_server_supports_labels(struct nfs_server *server)
5851{
5852 return server->caps & NFS_CAP_SECURITY_LABEL;
5853}
5854
5855static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5856 const void *buf, size_t buflen,
5857 int flags, int type)
5858{
5859 if (security_ismaclabel(key))
5860 return nfs4_set_security_label(dentry, buf, buflen);
5861
5862 return -EOPNOTSUPP;
5863}
5864
5865static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5866 void *buf, size_t buflen, int type)
5867{
5868 if (security_ismaclabel(key))
5869 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5870 return -EOPNOTSUPP;
5871}
5872
5873static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5874 size_t list_len, const char *name,
5875 size_t name_len, int type)
5876{
5877 size_t len = 0;
5878
5879 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5880 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5881 if (list && len <= list_len)
5882 security_inode_listsecurity(dentry->d_inode, list, len);
5883 }
5884 return len;
5885}
5886
5887static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5888 .prefix = XATTR_SECURITY_PREFIX,
5889 .list = nfs4_xattr_list_nfs4_label,
5890 .get = nfs4_xattr_get_nfs4_label,
5891 .set = nfs4_xattr_set_nfs4_label,
5892};
5893#endif
5894
5895
533eb461
AA		 5896/*
5897 * nfs_fhget will use either the mounted_on_fileid or the fileid
5898 */
69aaaae1
TM		 5899static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5900{
533eb461
AA		 5901 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5902 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5903 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5904 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5905 return;
5906
5907 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5908 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5909 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5910 fattr->nlink = 2;
5911}
5912
f05d147f
BS		 5913static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5914 const struct qstr *name,
5915 struct nfs4_fs_locations *fs_locations,
5916 struct page *page)
683b57b4
TM		 5917{
5918 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5919 u32 bitmask[3] = {
361e624f 5920 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5921 };
5922 struct nfs4_fs_locations_arg args = {
5923 .dir_fh = NFS_FH(dir),
c228fd3a 5924 .name = name,
683b57b4
TM		 5925 .page = page,
5926 .bitmask = bitmask,
5927 };
22958463
BH		 5928 struct nfs4_fs_locations_res res = {
5929 .fs_locations = fs_locations,
5930 };
683b57b4
TM		 5931 struct rpc_message msg = {
5932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5933 .rpc_argp = &args,
22958463 5934 .rpc_resp = &res,
683b57b4
TM		 5935 };
5936 int status;
5937
3110ff80 5938 dprintk("%s: start\n", __func__);
533eb461
AA		 5939
5940 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5941 * is not supported */
5942 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5943 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5944 else
5945 bitmask[0] |= FATTR4_WORD0_FILEID;
5946
c228fd3a 5947 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5948 fs_locations->server = server;
830b8e33 5949 fs_locations->nlocations = 0;
f05d147f 5950 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5951 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5952 return status;
5953}
5954
f05d147f
BS		 5955int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5956 const struct qstr *name,
5957 struct nfs4_fs_locations *fs_locations,
5958 struct page *page)
db0a9593
BS		 5959{
5960 struct nfs4_exception exception = { };
5961 int err;
5962 do {
078ea3df
TM		 5963 err = _nfs4_proc_fs_locations(client, dir, name,
5964 fs_locations, page);
5965 trace_nfs4_get_fs_locations(dir, name, err);
5966 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5967 &exception);
5968 } while (exception.retry);
5969 return err;
5970}
5971
5ec16a85 5972/**
a5250def
WAA		 5973 * If 'use_integrity' is true and the state managment nfs_client
5974 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5975 * and the machine credential as per RFC3530bis and RFC5661 Security
5976 * Considerations sections. Otherwise, just use the user cred with the
5977 * filesystem's rpc_client.
5ec16a85 5978 */
a5250def 5979static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5980{
5981 int status;
5982 struct nfs4_secinfo_arg args = {
5983 .dir_fh = NFS_FH(dir),
5984 .name = name,
5985 };
5986 struct nfs4_secinfo_res res = {
5987 .flavors = flavors,
5988 };
5989 struct rpc_message msg = {
5990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5991 .rpc_argp = &args,
5992 .rpc_resp = &res,
5993 };
a5250def
WAA		 5994 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
5995
5996 if (use_integrity) {
5997 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5998 msg.rpc_cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
5999 }
5a5ea0d4
BS		 6000
6001 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6002
6003 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6004 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6005
a5250def
WAA		 6006 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6007 &res.seq_res, 0);
5a5ea0d4 6008 dprintk("NFS reply secinfo: %d\n", status);
a5250def
WAA		 6009
6010 if (msg.rpc_cred)
6011 put_rpccred(msg.rpc_cred);
6012
5a5ea0d4
BS		 6013 return status;
6014}
6015
72de53ec
BS		 6016int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6017 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6018{
6019 struct nfs4_exception exception = { };
6020 int err;
6021 do {
a5250def
WAA		 6022 err = -NFS4ERR_WRONGSEC;
6023
6024 /* try to use integrity protection with machine cred */
6025 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6026 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6027
6028 /*
6029 * if unable to use integrity protection, or SECINFO with
6030 * integrity protection returns NFS4ERR_WRONGSEC (which is
6031 * disallowed by spec, but exists in deployed servers) use
6032 * the current filesystem's rpc_client and the user cred.
6033 */
6034 if (err == -NFS4ERR_WRONGSEC)
6035 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6036
078ea3df
TM		 6037 trace_nfs4_secinfo(dir, name, err);
6038 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6039 &exception);
6040 } while (exception.retry);
6041 return err;
6042}
6043
557134a3 6044#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6045/*
6046 * Check the exchange flags returned by the server for invalid flags, having
6047 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6048 * DS flags set.
6049 */
6050static int nfs4_check_cl_exchange_flags(u32 flags)
6051{
6052 if (flags & ~EXCHGID4_FLAG_MASK_R)
6053 goto out_inval;
6054 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6055 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6056 goto out_inval;
6057 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6058 goto out_inval;
6059 return NFS_OK;
6060out_inval:
6061 return -NFS4ERR_INVAL;
6062}
6063
78fe0f41 6064static bool
79d4e1f0
CL		 6065nfs41_same_server_scope(struct nfs41_server_scope *a,
6066 struct nfs41_server_scope *b)
78fe0f41
WAA		 6067{
6068 if (a->server_scope_sz == b->server_scope_sz &&
6069 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6070 return true;
6071
6072 return false;
6073}
6074
7c44f1ae
WAA		 6075/*
6076 * nfs4_proc_bind_conn_to_session()
6077 *
6078 * The 4.1 client currently uses the same TCP connection for the
6079 * fore and backchannel.
6080 */
2cf047c9 6081int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6082{
6083 int status;
6084 struct nfs41_bind_conn_to_session_res res;
6085 struct rpc_message msg = {
6086 .rpc_proc =
6087 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6088 .rpc_argp = clp,
6089 .rpc_resp = &res,
2cf047c9 6090 .rpc_cred = cred,
7c44f1ae
WAA		 6091 };
6092
6093 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6094
6095 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6096 if (unlikely(res.session == NULL)) {
6097 status = -ENOMEM;
6098 goto out;
6099 }
6100
6101 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6102 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6103 if (status == 0) {
6104 if (memcmp(res.session->sess_id.data,
6105 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6106 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6107 status = -EIO;
6108 goto out_session;
6109 }
6110 if (res.dir != NFS4_CDFS4_BOTH) {
6111 dprintk("NFS: %s: Unexpected direction from server\n",
6112 __func__);
6113 status = -EIO;
6114 goto out_session;
6115 }
6116 if (res.use_conn_in_rdma_mode) {
6117 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6118 __func__);
6119 status = -EIO;
6120 goto out_session;
6121 }
6122 }
6123out_session:
6124 kfree(res.session);
6125out:
6126 dprintk("<-- %s status= %d\n", __func__, status);
6127 return status;
6128}
6129
99fe60d0 6130/*
fa940720
WAA		 6131 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6132 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6133 */
6134static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6135 .how = SP4_MACH_CRED,
6136 .enforce.u.words = {
6137 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6138 1 << (OP_EXCHANGE_ID - 32) |
6139 1 << (OP_CREATE_SESSION - 32) |
6140 1 << (OP_DESTROY_SESSION - 32) |
6141 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6142 },
6143 .allow.u.words = {
6144 [0] = 1 << (OP_CLOSE) |
8b5bee2e
WAA		 6145 1 << (OP_LOCKU),
6146 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6147 1 << (OP_SECINFO_NO_NAME - 32) |
6148 1 << (OP_TEST_STATEID - 32) |
6149 1 << (OP_FREE_STATEID - 32)
2031cd1a
WAA		 6150 }
6151};
6152
6153/*
6154 * Select the state protection mode for client `clp' given the server results
6155 * from exchange_id in `sp'.
99fe60d0 6156 *
2031cd1a
WAA		 6157 * Returns 0 on success, negative errno otherwise.
6158 */
6159static int nfs4_sp4_select_mode(struct nfs_client *clp,
6160 struct nfs41_state_protection *sp)
6161{
6162 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6163 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6164 1 << (OP_EXCHANGE_ID - 32) |
6165 1 << (OP_CREATE_SESSION - 32) |
6166 1 << (OP_DESTROY_SESSION - 32) |
6167 1 << (OP_DESTROY_CLIENTID - 32)
6168 };
6169 unsigned int i;
6170
6171 if (sp->how == SP4_MACH_CRED) {
6172 /* Print state protect result */
6173 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6174 for (i = 0; i <= LAST_NFS4_OP; i++) {
6175 if (test_bit(i, sp->enforce.u.longs))
6176 dfprintk(MOUNT, " enforce op %d\n", i);
6177 if (test_bit(i, sp->allow.u.longs))
6178 dfprintk(MOUNT, " allow op %d\n", i);
6179 }
6180
6181 /* make sure nothing is on enforce list that isn't supported */
6182 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6183 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6184 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6185 return -EINVAL;
6186 }
6187 }
6188
6189 /*
6190 * Minimal mode - state operations are allowed to use machine
6191 * credential. Note this already happens by default, so the
6192 * client doesn't have to do anything more than the negotiation.
6193 *
6194 * NOTE: we don't care if EXCHANGE_ID is in the list -
6195 * we're already using the machine cred for exchange_id
6196 * and will never use a different cred.
6197 */
6198 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6199 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6200 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6201 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6202 dfprintk(MOUNT, "sp4_mach_cred:\n");
6203 dfprintk(MOUNT, " minimal mode enabled\n");
6204 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6205 } else {
6206 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6207 return -EINVAL;
6208 }
fa940720
WAA		 6209
6210 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6211 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6212 dfprintk(MOUNT, " cleanup mode enabled\n");
6213 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6214 }
8b5bee2e
WAA		 6215
6216 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6217 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6218 dfprintk(MOUNT, " secinfo mode enabled\n");
6219 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6220 }
3787d506
WAA		 6221
6222 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6223 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6224 dfprintk(MOUNT, " stateid mode enabled\n");
6225 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6226 }
8c21c62c
WAA		 6227
6228 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6229 dfprintk(MOUNT, " write mode enabled\n");
6230 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6231 }
6232
6233 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6234 dfprintk(MOUNT, " commit mode enabled\n");
6235 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6236 }
2031cd1a
WAA		 6237 }
6238
6239 return 0;
6240}
6241
6242/*
6243 * _nfs4_proc_exchange_id()
6bbb4ae8 6244 *
2031cd1a 6245 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6246 */
2031cd1a
WAA		 6247static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6248 u32 sp4_how)
99fe60d0
BH		 6249{
6250 nfs4_verifier verifier;
6251 struct nfs41_exchange_id_args args = {
cd93710e 6252 .verifier = &verifier,
99fe60d0 6253 .client = clp,
4f0b429d
TM		 6254 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6255 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6256 };
6257 struct nfs41_exchange_id_res res = {
32b01310 6258 0
99fe60d0
BH		 6259 };
6260 int status;
6261 struct rpc_message msg = {
6262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6263 .rpc_argp = &args,
6264 .rpc_resp = &res,
6265 .rpc_cred = cred,
6266 };
99fe60d0 6267
f092075d 6268 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6269 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6270 sizeof(args.id));
6bbb4ae8
CL		 6271 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6272 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6273 args.id_len, args.id);
99fe60d0 6274
acdeb69d 6275 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6276 GFP_NOFS);
acdeb69d 6277 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6278 status = -ENOMEM;
6279 goto out;
6280 }
78fe0f41 6281
79d4e1f0 6282 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6283 GFP_NOFS);
177313f1 6284 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6285 status = -ENOMEM;
acdeb69d 6286 goto out_server_owner;
abe9a6d5 6287 }
78fe0f41 6288
bbafffd2 6289 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6290 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6291 status = -ENOMEM;
6292 goto out_server_scope;
6293 }
6294
2031cd1a
WAA		 6295 switch (sp4_how) {
6296 case SP4_NONE:
6297 args.state_protect.how = SP4_NONE;
6298 break;
6299
6300 case SP4_MACH_CRED:
6301 args.state_protect = nfs4_sp4_mach_cred_request;
6302 break;
6303
6304 default:
6305 /* unsupported! */
6306 WARN_ON_ONCE(1);
6307 status = -EINVAL;
6308 goto out_server_scope;
6309 }
6310
1bd714f2 6311 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6312 trace_nfs4_exchange_id(clp, status);
177313f1 6313 if (status == 0)
32b01310 6314 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6315
2031cd1a
WAA		 6316 if (status == 0)
6317 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6318
acdeb69d 6319 if (status == 0) {
32b01310
TM		 6320 clp->cl_clientid = res.clientid;
6321 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6322 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6323 clp->cl_seqid = res.seqid;
6324
acdeb69d
CL		 6325 kfree(clp->cl_serverowner);
6326 clp->cl_serverowner = res.server_owner;
6327 res.server_owner = NULL;
78fe0f41 6328
7d2ed9ac 6329 /* use the most recent implementation id */
59155546
CL		 6330 kfree(clp->cl_implid);
6331 clp->cl_implid = res.impl_id;
7d2ed9ac 6332
177313f1 6333 if (clp->cl_serverscope != NULL &&
79d4e1f0 6334 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6335 res.server_scope)) {
6336 dprintk("%s: server_scope mismatch detected\n",
6337 __func__);
6338 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6339 kfree(clp->cl_serverscope);
6340 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6341 }
6342
177313f1 6343 if (clp->cl_serverscope == NULL) {
79d4e1f0 6344 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6345 goto out;
6346 }
32b01310
TM		 6347 } else
6348 kfree(res.impl_id);
7d2ed9ac 6349
acdeb69d
CL		 6350out_server_owner:
6351 kfree(res.server_owner);
7d2ed9ac 6352out_server_scope:
abe9a6d5
WAA		 6353 kfree(res.server_scope);
6354out:
177313f1 6355 if (clp->cl_implid != NULL)
6bbb4ae8 6356 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6357 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6358 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6359 clp->cl_implid->date.seconds,
6360 clp->cl_implid->date.nseconds);
6bbb4ae8 6361 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6362 return status;
6363}
6364
2031cd1a
WAA		 6365/*
6366 * nfs4_proc_exchange_id()
6367 *
6368 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6369 *
6370 * Since the clientid has expired, all compounds using sessions
6371 * associated with the stale clientid will be returning
6372 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6373 * be in some phase of session reset.
6374 *
6375 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6376 */
6377int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6378{
6379 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6380 int status;
6381
6382 /* try SP4_MACH_CRED if krb5i/p */
6383 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6384 authflavor == RPC_AUTH_GSS_KRB5P) {
6385 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6386 if (!status)
6387 return 0;
6388 }
6389
6390 /* try SP4_NONE */
6391 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6392}
6393
66245539
TM		 6394static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6395 struct rpc_cred *cred)
6396{
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6399 .rpc_argp = clp,
6400 .rpc_cred = cred,
6401 };
6402 int status;
6403
6404 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6405 trace_nfs4_destroy_clientid(clp, status);
66245539 6406 if (status)
02c67525 6407 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6408 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6409 return status;
6410}
6411
6412static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6413 struct rpc_cred *cred)
6414{
6415 unsigned int loop;
6416 int ret;
6417
6418 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6419 ret = _nfs4_proc_destroy_clientid(clp, cred);
6420 switch (ret) {
6421 case -NFS4ERR_DELAY:
6422 case -NFS4ERR_CLIENTID_BUSY:
6423 ssleep(1);
6424 break;
6425 default:
6426 return ret;
6427 }
6428 }
6429 return 0;
6430}
6431
6432int nfs4_destroy_clientid(struct nfs_client *clp)
6433{
6434 struct rpc_cred *cred;
6435 int ret = 0;
6436
6437 if (clp->cl_mvops->minor_version < 1)
6438 goto out;
6439 if (clp->cl_exchange_flags == 0)
6440 goto out;
05f4c350
CL		 6441 if (clp->cl_preserve_clid)
6442 goto out;
73d8bde5 6443 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6444 ret = nfs4_proc_destroy_clientid(clp, cred);
6445 if (cred)
6446 put_rpccred(cred);
6447 switch (ret) {
6448 case 0:
6449 case -NFS4ERR_STALE_CLIENTID:
6450 clp->cl_exchange_flags = 0;
6451 }
6452out:
6453 return ret;
6454}
6455
2050f0cc
AA		 6456struct nfs4_get_lease_time_data {
6457 struct nfs4_get_lease_time_args *args;
6458 struct nfs4_get_lease_time_res *res;
6459 struct nfs_client *clp;
6460};
6461
6462static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6463 void *calldata)
6464{
2050f0cc
AA		 6465 struct nfs4_get_lease_time_data *data =
6466 (struct nfs4_get_lease_time_data *)calldata;
6467
6468 dprintk("--> %s\n", __func__);
6469 /* just setup sequence, do not trigger session recovery
6470 since we're invoked within one */
d9afbd1b
TM		 6471 nfs41_setup_sequence(data->clp->cl_session,
6472 &data->args->la_seq_args,
6473 &data->res->lr_seq_res,
6474 task);
2050f0cc
AA		 6475 dprintk("<-- %s\n", __func__);
6476}
6477
6478/*
6479 * Called from nfs4_state_manager thread for session setup, so don't recover
6480 * from sequence operation or clientid errors.
6481 */
6482static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6483{
6484 struct nfs4_get_lease_time_data *data =
6485 (struct nfs4_get_lease_time_data *)calldata;
6486
6487 dprintk("--> %s\n", __func__);
14516c3a
TM		 6488 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6489 return;
2050f0cc
AA		 6490 switch (task->tk_status) {
6491 case -NFS4ERR_DELAY:
6492 case -NFS4ERR_GRACE:
6493 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6494 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6495 task->tk_status = 0;
a8a4ae3a
AA		 6496 /* fall through */
6497 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6498 rpc_restart_call_prepare(task);
2050f0cc
AA		 6499 return;
6500 }
2050f0cc
AA		 6501 dprintk("<-- %s\n", __func__);
6502}
6503
17280175 6504static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6505 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6506 .rpc_call_done = nfs4_get_lease_time_done,
6507};
6508
6509int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6510{
6511 struct rpc_task *task;
6512 struct nfs4_get_lease_time_args args;
6513 struct nfs4_get_lease_time_res res = {
6514 .lr_fsinfo = fsinfo,
6515 };
6516 struct nfs4_get_lease_time_data data = {
6517 .args = &args,
6518 .res = &res,
6519 .clp = clp,
6520 };
6521 struct rpc_message msg = {
6522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6523 .rpc_argp = &args,
6524 .rpc_resp = &res,
6525 };
6526 struct rpc_task_setup task_setup = {
6527 .rpc_client = clp->cl_rpcclient,
6528 .rpc_message = &msg,
6529 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6530 .callback_data = &data,
6531 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6532 };
6533 int status;
6534
a9c92d6b 6535 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6536 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6537 dprintk("--> %s\n", __func__);
6538 task = rpc_run_task(&task_setup);
6539
6540 if (IS_ERR(task))
6541 status = PTR_ERR(task);
6542 else {
6543 status = task->tk_status;
6544 rpc_put_task(task);
6545 }
6546 dprintk("<-- %s return %d\n", __func__, status);
6547
6548 return status;
6549}
6550
fc931582
AA		 6551/*
6552 * Initialize the values to be used by the client in CREATE_SESSION
6553 * If nfs4_init_session set the fore channel request and response sizes,
6554 * use them.
6555 *
6556 * Set the back channel max_resp_sz_cached to zero to force the client to
6557 * always set csa_cachethis to FALSE because the current implementation
6558 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6559 */
6560static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6561{
18aad3d5
AA		 6562 unsigned int max_rqst_sz, max_resp_sz;
6563
6564 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6565 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6566
fc931582 6567 /* Fore channel attributes */
18aad3d5
AA		 6568 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6569 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6570 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6571 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6572
6573 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6574 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6575 __func__,
6576 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6577 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6578
6579 /* Back channel attributes */
fc931582
AA		 6580 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6581 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6582 args->bc_attrs.max_resp_sz_cached = 0;
6583 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6584 args->bc_attrs.max_reqs = 1;
6585
6586 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6587 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6588 __func__,
6589 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6590 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6591 args->bc_attrs.max_reqs);
6592}
6593
43c2e885 6594static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6595{
43c2e885
BF		 6596 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6597 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6598
43c2e885
BF		 6599 if (rcvd->max_resp_sz > sent->max_resp_sz)
6600 return -EINVAL;
6601 /*
6602 * Our requested max_ops is the minimum we need; we're not
6603 * prepared to break up compounds into smaller pieces than that.
6604 * So, no point even trying to continue if the server won't
6605 * cooperate:
6606 */
6607 if (rcvd->max_ops < sent->max_ops)
6608 return -EINVAL;
6609 if (rcvd->max_reqs == 0)
6610 return -EINVAL;
b4b9a0c1
VG		 6611 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6612 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6613 return 0;
8d35301d
AA		 6614}
6615
43c2e885
BF		 6616static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6617{
6618 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6619 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6620
43c2e885
BF		 6621 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6622 return -EINVAL;
6623 if (rcvd->max_resp_sz < sent->max_resp_sz)
6624 return -EINVAL;
6625 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6626 return -EINVAL;
6627 /* These would render the backchannel useless: */
b4b9a0c1 6628 if (rcvd->max_ops != sent->max_ops)
43c2e885 6629 return -EINVAL;
b4b9a0c1 6630 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6631 return -EINVAL;
6632 return 0;
6633}
8d35301d 6634
8d35301d
AA		 6635static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6636 struct nfs4_session *session)
6637{
43c2e885 6638 int ret;
8d35301d 6639
43c2e885
BF		 6640 ret = nfs4_verify_fore_channel_attrs(args, session);
6641 if (ret)
6642 return ret;
6643 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6644}
6645
848f5bda
TM		 6646static int _nfs4_proc_create_session(struct nfs_client *clp,
6647 struct rpc_cred *cred)
fc931582
AA		 6648{
6649 struct nfs4_session *session = clp->cl_session;
6650 struct nfs41_create_session_args args = {
6651 .client = clp,
6652 .cb_program = NFS4_CALLBACK,
6653 };
6654 struct nfs41_create_session_res res = {
6655 .client = clp,
6656 };
6657 struct rpc_message msg = {
6658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6659 .rpc_argp = &args,
6660 .rpc_resp = &res,
848f5bda 6661 .rpc_cred = cred,
fc931582
AA		 6662 };
6663 int status;
6664
6665 nfs4_init_channel_attrs(&args);
0f91421e 6666 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6667
1bd714f2 6668 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6669 trace_nfs4_create_session(clp, status);
fc931582 6670
43095d39 6671 if (!status) {
8d35301d
AA		 6672 /* Verify the session's negotiated channel_attrs values */
6673 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6674 /* Increment the clientid slot sequence id */
6675 clp->cl_seqid++;
6676 }
6677
6678 return status;
6679}
6680
6681/*
6682 * Issues a CREATE_SESSION operation to the server.
6683 * It is the responsibility of the caller to verify the session is
6684 * expired before calling this routine.
6685 */
848f5bda 6686int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6687{
6688 int status;
6689 unsigned *ptr;
fc931582
AA		 6690 struct nfs4_session *session = clp->cl_session;
6691
6692 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6693
848f5bda 6694 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6695 if (status)
6696 goto out;
6697
aacd5537
AA		 6698 /* Init or reset the session slot tables */
6699 status = nfs4_setup_session_slot_tables(session);
6700 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6701 if (status)
6702 goto out;
6703
6704 ptr = (unsigned *)&session->sess_id.data[0];
6705 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6706 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6707out:
6708 dprintk("<-- %s\n", __func__);
6709 return status;
6710}
6711
0f3e66c6
AA		 6712/*
6713 * Issue the over-the-wire RPC DESTROY_SESSION.
6714 * The caller must serialize access to this routine.
6715 */
848f5bda
TM		 6716int nfs4_proc_destroy_session(struct nfs4_session *session,
6717 struct rpc_cred *cred)
0f3e66c6 6718{
848f5bda
TM		 6719 struct rpc_message msg = {
6720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6721 .rpc_argp = session,
6722 .rpc_cred = cred,
6723 };
0f3e66c6 6724 int status = 0;
0f3e66c6
AA		 6725
6726 dprintk("--> nfs4_proc_destroy_session\n");
6727
6728 /* session is still being setup */
6729 if (session->clp->cl_cons_state != NFS_CS_READY)
6730 return status;
6731
1bd714f2 6732 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6733 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6734
6735 if (status)
08106ac7 6736 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6737 "Session has been destroyed regardless...\n", status);
6738
6739 dprintk("<-- nfs4_proc_destroy_session\n");
6740 return status;
6741}
6742
fc01cea9
AA		 6743/*
6744 * Renew the cl_session lease.
6745 */
d5f8d3fe
TM		 6746struct nfs4_sequence_data {
6747 struct nfs_client *clp;
6748 struct nfs4_sequence_args args;
6749 struct nfs4_sequence_res res;
6750};
6751
dc96aef9
AB		 6752static void nfs41_sequence_release(void *data)
6753{
d5f8d3fe
TM		 6754 struct nfs4_sequence_data *calldata = data;
6755 struct nfs_client *clp = calldata->clp;
dc96aef9 6756
7135840f
AB		 6757 if (atomic_read(&clp->cl_count) > 1)
6758 nfs4_schedule_state_renewal(clp);
6759 nfs_put_client(clp);
d5f8d3fe 6760 kfree(calldata);
dc96aef9
AB		 6761}
6762
aa5190d0
TM		 6763static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6764{
6765 switch(task->tk_status) {
6766 case -NFS4ERR_DELAY:
aa5190d0
TM		 6767 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6768 return -EAGAIN;
6769 default:
0400a6b0 6770 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6771 }
6772 return 0;
6773}
6774
dc96aef9 6775static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6776{
d5f8d3fe
TM		 6777 struct nfs4_sequence_data *calldata = data;
6778 struct nfs_client *clp = calldata->clp;
fc01cea9 6779
14516c3a
TM		 6780 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6781 return;
fc01cea9 6782
c6d01c6f 6783 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6784 if (task->tk_status < 0) {
6785 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6786 if (atomic_read(&clp->cl_count) == 1)
6787 goto out;
fc01cea9 6788
aa5190d0
TM		 6789 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6790 rpc_restart_call_prepare(task);
fc01cea9
AA		 6791 return;
6792 }
6793 }
fc01cea9 6794 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6795out:
fc01cea9
AA		 6796 dprintk("<-- %s\n", __func__);
6797}
6798
6799static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6800{
d5f8d3fe
TM		 6801 struct nfs4_sequence_data *calldata = data;
6802 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6803 struct nfs4_sequence_args *args;
6804 struct nfs4_sequence_res *res;
6805
fc01cea9
AA		 6806 args = task->tk_msg.rpc_argp;
6807 res = task->tk_msg.rpc_resp;
6808
d9afbd1b 6809 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6810}
6811
6812static const struct rpc_call_ops nfs41_sequence_ops = {
6813 .rpc_call_done = nfs41_sequence_call_done,
6814 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6815 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6816};
6817
8fe72bac
TM		 6818static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6819 struct rpc_cred *cred,
6820 bool is_privileged)
fc01cea9 6821{
d5f8d3fe 6822 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6823 struct rpc_message msg = {
6824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6825 .rpc_cred = cred,
6826 };
71ac6da9
TM		 6827 struct rpc_task_setup task_setup_data = {
6828 .rpc_client = clp->cl_rpcclient,
6829 .rpc_message = &msg,
8fe72bac 6830 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6831 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6832 };
fc01cea9 6833
7135840f 6834 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6835 return ERR_PTR(-EIO);
dfb4f309 6836 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6837 if (calldata == NULL) {
7135840f 6838 nfs_put_client(clp);
71ac6da9 6839 return ERR_PTR(-ENOMEM);
fc01cea9 6840 }
a9c92d6b 6841 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6842 if (is_privileged)
6843 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6844 msg.rpc_argp = &calldata->args;
6845 msg.rpc_resp = &calldata->res;
6846 calldata->clp = clp;
71ac6da9 6847 task_setup_data.callback_data = calldata;
fc01cea9 6848
71ac6da9
TM		 6849 return rpc_run_task(&task_setup_data);
6850}
6851
2f60ea6b 6852static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6853{
6854 struct rpc_task *task;
6855 int ret = 0;
6856
2f60ea6b
TM		 6857 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6858 return 0;
8fe72bac 6859 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6860 if (IS_ERR(task))
6861 ret = PTR_ERR(task);
6862 else
bf294b41 6863 rpc_put_task_async(task);
71ac6da9
TM		 6864 dprintk("<-- %s status=%d\n", __func__, ret);
6865 return ret;
6866}
6867
6868static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6869{
6870 struct rpc_task *task;
6871 int ret;
6872
8fe72bac 6873 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6874 if (IS_ERR(task)) {
6875 ret = PTR_ERR(task);
6876 goto out;
6877 }
6878 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6879 if (!ret) {
6880 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6881
6882 if (task->tk_status == 0)
6883 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6884 ret = task->tk_status;
b4410c2f 6885 }
71ac6da9
TM		 6886 rpc_put_task(task);
6887out:
6888 dprintk("<-- %s status=%d\n", __func__, ret);
6889 return ret;
fc01cea9
AA		 6890}
6891
fce5c838
RL		 6892struct nfs4_reclaim_complete_data {
6893 struct nfs_client *clp;
6894 struct nfs41_reclaim_complete_args arg;
6895 struct nfs41_reclaim_complete_res res;
6896};
6897
6898static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6899{
6900 struct nfs4_reclaim_complete_data *calldata = data;
6901
d9afbd1b
TM		 6902 nfs41_setup_sequence(calldata->clp->cl_session,
6903 &calldata->arg.seq_args,
6904 &calldata->res.seq_res,
6905 task);
fce5c838
RL		 6906}
6907
aa5190d0
TM		 6908static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6909{
6910 switch(task->tk_status) {
6911 case 0:
6912 case -NFS4ERR_COMPLETE_ALREADY:
6913 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6914 break;
6915 case -NFS4ERR_DELAY:
aa5190d0 6916 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6917 /* fall through */
6918 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6919 return -EAGAIN;
6920 default:
0400a6b0 6921 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6922 }
6923 return 0;
6924}
6925
fce5c838
RL		 6926static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6927{
6928 struct nfs4_reclaim_complete_data *calldata = data;
6929 struct nfs_client *clp = calldata->clp;
6930 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6931
6932 dprintk("--> %s\n", __func__);
14516c3a
TM		 6933 if (!nfs41_sequence_done(task, res))
6934 return;
fce5c838 6935
c6d01c6f 6936 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6937 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6938 rpc_restart_call_prepare(task);
6939 return;
6940 }
fce5c838
RL		 6941 dprintk("<-- %s\n", __func__);
6942}
6943
6944static void nfs4_free_reclaim_complete_data(void *data)
6945{
6946 struct nfs4_reclaim_complete_data *calldata = data;
6947
6948 kfree(calldata);
6949}
6950
6951static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6952 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6953 .rpc_call_done = nfs4_reclaim_complete_done,
6954 .rpc_release = nfs4_free_reclaim_complete_data,
6955};
6956
6957/*
6958 * Issue a global reclaim complete.
6959 */
965e9c23
TM		 6960static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6961 struct rpc_cred *cred)
fce5c838
RL		 6962{
6963 struct nfs4_reclaim_complete_data *calldata;
6964 struct rpc_task *task;
6965 struct rpc_message msg = {
6966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6967 .rpc_cred = cred,
fce5c838
RL		 6968 };
6969 struct rpc_task_setup task_setup_data = {
6970 .rpc_client = clp->cl_rpcclient,
6971 .rpc_message = &msg,
6972 .callback_ops = &nfs4_reclaim_complete_call_ops,
6973 .flags = RPC_TASK_ASYNC,
6974 };
6975 int status = -ENOMEM;
6976
6977 dprintk("--> %s\n", __func__);
8535b2be 6978 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6979 if (calldata == NULL)
6980 goto out;
6981 calldata->clp = clp;
6982 calldata->arg.one_fs = 0;
fce5c838 6983
a9c92d6b 6984 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6985 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6986 msg.rpc_argp = &calldata->arg;
6987 msg.rpc_resp = &calldata->res;
6988 task_setup_data.callback_data = calldata;
6989 task = rpc_run_task(&task_setup_data);
acf82b85 6990 if (IS_ERR(task)) {
fce5c838 6991 status = PTR_ERR(task);
acf82b85
DC		 6992 goto out;
6993 }
c34c32ea
AA		 6994 status = nfs4_wait_for_completion_rpc_task(task);
6995 if (status == 0)
6996 status = task->tk_status;
fce5c838 6997 rpc_put_task(task);
acf82b85 6998 return 0;
fce5c838
RL		 6999out:
7000 dprintk("<-- %s status=%d\n", __func__, status);
7001 return status;
7002}
b1f69b75
AA		 7003
7004static void
7005nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7006{
7007 struct nfs4_layoutget *lgp = calldata;
c31663d4 7008 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7009 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7010
7011 dprintk("--> %s\n", __func__);
c31663d4
FI		 7012 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7013 * right now covering the LAYOUTGET we are about to send.
7014 * However, that is not so catastrophic, and there seems
7015 * to be no way to prevent it completely.
7016 */
6ba7db34 7017 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7018 &lgp->res.seq_res, task))
b1f69b75 7019 return;
cf7d63f1
FI		 7020 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7021 NFS_I(lgp->args.inode)->layout,
7022 lgp->args.ctx->state)) {
7023 rpc_exit(task, NFS4_OK);
cf7d63f1 7024 }
b1f69b75
AA		 7025}
7026
7027static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7028{
7029 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7030 struct inode *inode = lgp->args.inode;
7031 struct nfs_server *server = NFS_SERVER(inode);
7032 struct pnfs_layout_hdr *lo;
7033 struct nfs4_state *state = NULL;
30005121 7034 unsigned long timeo, giveup;
b1f69b75
AA		 7035
7036 dprintk("--> %s\n", __func__);
7037
6ba7db34 7038 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7039 goto out;
b1f69b75
AA		 7040
7041 switch (task->tk_status) {
7042 case 0:
ee314c2a 7043 goto out;
b1f69b75
AA		 7044 case -NFS4ERR_LAYOUTTRYLATER:
7045 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7046 timeo = rpc_get_timeout(task->tk_client);
7047 giveup = lgp->args.timestamp + timeo;
7048 if (time_after(giveup, jiffies))
7049 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7050 break;
7051 case -NFS4ERR_EXPIRED:
7052 case -NFS4ERR_BAD_STATEID:
7053 spin_lock(&inode->i_lock);
7054 lo = NFS_I(inode)->layout;
7055 if (!lo || list_empty(&lo->plh_segs)) {
7056 spin_unlock(&inode->i_lock);
7057 /* If the open stateid was bad, then recover it. */
7058 state = lgp->args.ctx->state;
7059 } else {
7060 LIST_HEAD(head);
7061
7062 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7063 spin_unlock(&inode->i_lock);
7064 /* Mark the bad layout state as invalid, then
7065 * retry using the open stateid. */
7066 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7067 }
7068 }
ee314c2a
TM		 7069 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7070 rpc_restart_call_prepare(task);
7071out:
b1f69b75
AA		 7072 dprintk("<-- %s\n", __func__);
7073}
7074
8554116e
IK		 7075static size_t max_response_pages(struct nfs_server *server)
7076{
7077 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7078 return nfs_page_array_len(0, max_resp_sz);
7079}
7080
7081static void nfs4_free_pages(struct page **pages, size_t size)
7082{
7083 int i;
7084
7085 if (!pages)
7086 return;
7087
7088 for (i = 0; i < size; i++) {
7089 if (!pages[i])
7090 break;
7091 __free_page(pages[i]);
7092 }
7093 kfree(pages);
7094}
7095
7096static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7097{
7098 struct page **pages;
7099 int i;
7100
7101 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7102 if (!pages) {
7103 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7104 return NULL;
7105 }
7106
7107 for (i = 0; i < size; i++) {
7108 pages[i] = alloc_page(gfp_flags);
7109 if (!pages[i]) {
7110 dprintk("%s: failed to allocate page\n", __func__);
7111 nfs4_free_pages(pages, size);
7112 return NULL;
7113 }
7114 }
7115
7116 return pages;
7117}
7118
b1f69b75
AA		 7119static void nfs4_layoutget_release(void *calldata)
7120{
7121 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7122 struct inode *inode = lgp->args.inode;
7123 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7124 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7125
7126 dprintk("--> %s\n", __func__);
8554116e 7127 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7128 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7129 put_nfs_open_context(lgp->args.ctx);
7130 kfree(calldata);
7131 dprintk("<-- %s\n", __func__);
7132}
7133
7134static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7135 .rpc_call_prepare = nfs4_layoutget_prepare,
7136 .rpc_call_done = nfs4_layoutget_done,
7137 .rpc_release = nfs4_layoutget_release,
7138};
7139
a0b0a6e3
TM		 7140struct pnfs_layout_segment *
7141nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7142{
a47970ff
WAA		 7143 struct inode *inode = lgp->args.inode;
7144 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7145 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7146 struct rpc_task *task;
7147 struct rpc_message msg = {
7148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7149 .rpc_argp = &lgp->args,
7150 .rpc_resp = &lgp->res,
6ab59344 7151 .rpc_cred = lgp->cred,
b1f69b75
AA		 7152 };
7153 struct rpc_task_setup task_setup_data = {
7154 .rpc_client = server->client,
7155 .rpc_message = &msg,
7156 .callback_ops = &nfs4_layoutget_call_ops,
7157 .callback_data = lgp,
7158 .flags = RPC_TASK_ASYNC,
7159 };
a0b0a6e3 7160 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7161 int status = 0;
7162
7163 dprintk("--> %s\n", __func__);
7164
8554116e
IK		 7165 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7166 if (!lgp->args.layout.pages) {
7167 nfs4_layoutget_release(lgp);
a0b0a6e3 7168 return ERR_PTR(-ENOMEM);
8554116e
IK		 7169 }
7170 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7171 lgp->args.timestamp = jiffies;
8554116e 7172
35124a09 7173 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7174 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7175 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7176
7177 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7178 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7179
b1f69b75
AA		 7180 task = rpc_run_task(&task_setup_data);
7181 if (IS_ERR(task))
a0b0a6e3 7182 return ERR_CAST(task);
b1f69b75 7183 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7184 if (status == 0)
7185 status = task->tk_status;
1037e6ea
TM		 7186 trace_nfs4_layoutget(lgp->args.ctx,
7187 &lgp->args.range,
7188 &lgp->res.range,
7189 status);
085b7a45
WAA		 7190 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7191 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7192 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7193 rpc_put_task(task);
7194 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7195 if (status)
7196 return ERR_PTR(status);
7197 return lseg;
b1f69b75
AA		 7198}
7199
cbe82603
BH		 7200static void
7201nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7202{
7203 struct nfs4_layoutreturn *lrp = calldata;
7204
7205 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7206 nfs41_setup_sequence(lrp->clp->cl_session,
7207 &lrp->args.seq_args,
7208 &lrp->res.seq_res,
7209 task);
cbe82603
BH		 7210}
7211
7212static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7213{
7214 struct nfs4_layoutreturn *lrp = calldata;
7215 struct nfs_server *server;
7216
7217 dprintk("--> %s\n", __func__);
7218
6ba7db34 7219 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7220 return;
7221
7222 server = NFS_SERVER(lrp->args.inode);
7223 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7224 rpc_restart_call_prepare(task);
cbe82603
BH		 7225 return;
7226 }
cbe82603
BH		 7227 dprintk("<-- %s\n", __func__);
7228}
7229
7230static void nfs4_layoutreturn_release(void *calldata)
7231{
7232 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7233 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7234
7235 dprintk("--> %s\n", __func__);
849b286f
TM		 7236 spin_lock(&lo->plh_inode->i_lock);
7237 if (lrp->res.lrs_present)
7238 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7239 lo->plh_block_lgets--;
7240 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7241 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7242 kfree(calldata);
7243 dprintk("<-- %s\n", __func__);
7244}
7245
7246static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7247 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7248 .rpc_call_done = nfs4_layoutreturn_done,
7249 .rpc_release = nfs4_layoutreturn_release,
7250};
7251
7252int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7253{
7254 struct rpc_task *task;
7255 struct rpc_message msg = {
7256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7257 .rpc_argp = &lrp->args,
7258 .rpc_resp = &lrp->res,
9556000d 7259 .rpc_cred = lrp->cred,
cbe82603
BH		 7260 };
7261 struct rpc_task_setup task_setup_data = {
1771c577 7262 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7263 .rpc_message = &msg,
7264 .callback_ops = &nfs4_layoutreturn_call_ops,
7265 .callback_data = lrp,
7266 };
7267 int status;
7268
7269 dprintk("--> %s\n", __func__);
a9c92d6b 7270 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7271 task = rpc_run_task(&task_setup_data);
7272 if (IS_ERR(task))
7273 return PTR_ERR(task);
7274 status = task->tk_status;
1037e6ea 7275 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7276 dprintk("<-- %s status=%d\n", __func__, status);
7277 rpc_put_task(task);
7278 return status;
7279}
7280
7f11d8d3
AA		 7281/*
7282 * Retrieve the list of Data Server devices from the MDS.
7283 */
7284static int _nfs4_getdevicelist(struct nfs_server *server,
7285 const struct nfs_fh *fh,
7286 struct pnfs_devicelist *devlist)
7287{
7288 struct nfs4_getdevicelist_args args = {
7289 .fh = fh,
7290 .layoutclass = server->pnfs_curr_ld->id,
7291 };
7292 struct nfs4_getdevicelist_res res = {
7293 .devlist = devlist,
7294 };
7295 struct rpc_message msg = {
7296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7297 .rpc_argp = &args,
7298 .rpc_resp = &res,
7299 };
7300 int status;
7301
7302 dprintk("--> %s\n", __func__);
7303 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7304 &res.seq_res, 0);
7305 dprintk("<-- %s status=%d\n", __func__, status);
7306 return status;
7307}
7308
7309int nfs4_proc_getdevicelist(struct nfs_server *server,
7310 const struct nfs_fh *fh,
7311 struct pnfs_devicelist *devlist)
7312{
7313 struct nfs4_exception exception = { };
7314 int err;
7315
7316 do {
7317 err = nfs4_handle_exception(server,
7318 _nfs4_getdevicelist(server, fh, devlist),
7319 &exception);
7320 } while (exception.retry);
7321
7322 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7323 err, devlist->num_devs);
7324
7325 return err;
7326}
7327EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7328
b1f69b75 7329static int
cd5875fe
TM		 7330_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7331 struct pnfs_device *pdev,
7332 struct rpc_cred *cred)
b1f69b75
AA		 7333{
7334 struct nfs4_getdeviceinfo_args args = {
7335 .pdev = pdev,
7336 };
7337 struct nfs4_getdeviceinfo_res res = {
7338 .pdev = pdev,
7339 };
7340 struct rpc_message msg = {
7341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7342 .rpc_argp = &args,
7343 .rpc_resp = &res,
cd5875fe 7344 .rpc_cred = cred,
b1f69b75
AA		 7345 };
7346 int status;
7347
7348 dprintk("--> %s\n", __func__);
7c513058 7349 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7350 dprintk("<-- %s status=%d\n", __func__, status);
7351
7352 return status;
7353}
7354
cd5875fe
TM		 7355int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7356 struct pnfs_device *pdev,
7357 struct rpc_cred *cred)
b1f69b75
AA		 7358{
7359 struct nfs4_exception exception = { };
7360 int err;
7361
7362 do {
7363 err = nfs4_handle_exception(server,
cd5875fe 7364 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7365 &exception);
7366 } while (exception.retry);
7367 return err;
7368}
7369EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7370
863a3c6c
AA		 7371static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7372{
7373 struct nfs4_layoutcommit_data *data = calldata;
7374 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7375 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7376
d9afbd1b
TM		 7377 nfs41_setup_sequence(session,
7378 &data->args.seq_args,
7379 &data->res.seq_res,
7380 task);
863a3c6c
AA		 7381}
7382
7383static void
7384nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7385{
7386 struct nfs4_layoutcommit_data *data = calldata;
7387 struct nfs_server *server = NFS_SERVER(data->args.inode);
7388
6ba7db34 7389 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7390 return;
7391
7392 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7393 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7394 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7395 case -NFS4ERR_BADLAYOUT: /* no layout */
7396 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7397 task->tk_status = 0;
e59d27e0
TM		 7398 break;
7399 case 0:
863a3c6c
AA		 7400 nfs_post_op_update_inode_force_wcc(data->args.inode,
7401 data->res.fattr);
e59d27e0
TM		 7402 break;
7403 default:
7404 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7405 rpc_restart_call_prepare(task);
7406 return;
7407 }
7408 }
863a3c6c
AA		 7409}
7410
7411static void nfs4_layoutcommit_release(void *calldata)
7412{
7413 struct nfs4_layoutcommit_data *data = calldata;
7414
db29c089 7415 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7416 put_rpccred(data->cred);
7417 kfree(data);
7418}
7419
7420static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7421 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7422 .rpc_call_done = nfs4_layoutcommit_done,
7423 .rpc_release = nfs4_layoutcommit_release,
7424};
7425
7426int
ef311537 7427nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7428{
7429 struct rpc_message msg = {
7430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7431 .rpc_argp = &data->args,
7432 .rpc_resp = &data->res,
7433 .rpc_cred = data->cred,
7434 };
7435 struct rpc_task_setup task_setup_data = {
7436 .task = &data->task,
7437 .rpc_client = NFS_CLIENT(data->args.inode),
7438 .rpc_message = &msg,
7439 .callback_ops = &nfs4_layoutcommit_ops,
7440 .callback_data = data,
7441 .flags = RPC_TASK_ASYNC,
7442 };
7443 struct rpc_task *task;
7444 int status = 0;
7445
7446 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7447 "lbw: %llu inode %lu\n",
7448 data->task.tk_pid, sync,
7449 data->args.lastbytewritten,
7450 data->args.inode->i_ino);
7451
a9c92d6b 7452 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7453 task = rpc_run_task(&task_setup_data);
7454 if (IS_ERR(task))
7455 return PTR_ERR(task);
ef311537 7456 if (sync == false)
863a3c6c
AA		 7457 goto out;
7458 status = nfs4_wait_for_completion_rpc_task(task);
7459 if (status != 0)
7460 goto out;
7461 status = task->tk_status;
1037e6ea 7462 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7463out:
7464 dprintk("%s: status %d\n", __func__, status);
7465 rpc_put_task(task);
7466 return status;
7467}
fca78d6d 7468
97431204
AA		 7469/**
7470 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7471 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7472 */
fca78d6d
BS		 7473static int
7474_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7475 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7476{
7477 struct nfs41_secinfo_no_name_args args = {
7478 .style = SECINFO_STYLE_CURRENT_FH,
7479 };
7480 struct nfs4_secinfo_res res = {
7481 .flavors = flavors,
7482 };
7483 struct rpc_message msg = {
7484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7485 .rpc_argp = &args,
7486 .rpc_resp = &res,
7487 };
97431204
AA		 7488 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7489 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7490}
7491
7492static int
7493nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7494 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7495{
7496 struct nfs4_exception exception = { };
7497 int err;
7498 do {
7499 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7500 switch (err) {
7501 case 0:
7502 case -NFS4ERR_WRONGSEC:
7503 case -NFS4ERR_NOTSUPP:
05e9cfb4 7504 goto out;
fca78d6d
BS		 7505 default:
7506 err = nfs4_handle_exception(server, err, &exception);
7507 }
7508 } while (exception.retry);
05e9cfb4 7509out:
fca78d6d
BS		 7510 return err;
7511}
7512
7513static int
7514nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7515 struct nfs_fsinfo *info)
7516{
7517 int err;
7518 struct page *page;
7519 rpc_authflavor_t flavor;
7520 struct nfs4_secinfo_flavors *flavors;
7521
7522 page = alloc_page(GFP_KERNEL);
7523 if (!page) {
7524 err = -ENOMEM;
7525 goto out;
7526 }
7527
7528 flavors = page_address(page);
7529 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7530
7531 /*
7532 * Fall back on "guess and check" method if
7533 * the server doesn't support SECINFO_NO_NAME
7534 */
7535 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7536 err = nfs4_find_root_sec(server, fhandle, info);
7537 goto out_freepage;
7538 }
7539 if (err)
7540 goto out_freepage;
7541
7542 flavor = nfs_find_best_sec(flavors);
7543 if (err == 0)
7544 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7545
7546out_freepage:
7547 put_page(page);
7548 if (err == -EACCES)
7549 return -EPERM;
7550out:
7551 return err;
7552}
1cab0652 7553
ab7cb0df
TM		 7554static int _nfs41_test_stateid(struct nfs_server *server,
7555 nfs4_stateid *stateid,
7556 struct rpc_cred *cred)
7d974794
BS		 7557{
7558 int status;
7559 struct nfs41_test_stateid_args args = {
1cab0652 7560 .stateid = stateid,
7d974794
BS		 7561 };
7562 struct nfs41_test_stateid_res res;
7563 struct rpc_message msg = {
7564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7565 .rpc_argp = &args,
7566 .rpc_resp = &res,
ab7cb0df 7567 .rpc_cred = cred,
7d974794 7568 };
3787d506
WAA		 7569 struct rpc_clnt *rpc_client = server->client;
7570
7571 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7572 &rpc_client, &msg);
1cab0652 7573
38527b15 7574 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7575 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7576 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7577 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7578 &args.seq_args, &res.seq_res);
38527b15
CL		 7579 if (status != NFS_OK) {
7580 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7581 return status;
38527b15
CL		 7582 }
7583 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7584 return -res.status;
7d974794
BS		 7585}
7586
38527b15
CL		 7587/**
7588 * nfs41_test_stateid - perform a TEST_STATEID operation
7589 *
7590 * @server: server / transport on which to perform the operation
7591 * @stateid: state ID to test
ab7cb0df 7592 * @cred: credential
38527b15
CL		 7593 *
7594 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7595 * Otherwise a negative NFS4ERR value is returned if the operation
7596 * failed or the state ID is not currently valid.
7597 */
ab7cb0df
TM		 7598static int nfs41_test_stateid(struct nfs_server *server,
7599 nfs4_stateid *stateid,
7600 struct rpc_cred *cred)
7d974794
BS		 7601{
7602 struct nfs4_exception exception = { };
7603 int err;
7604 do {
ab7cb0df 7605 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7606 if (err != -NFS4ERR_DELAY)
7607 break;
7608 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7609 } while (exception.retry);
7610 return err;
7611}
9aeda35f 7612
7c1d5fae
TM		 7613struct nfs_free_stateid_data {
7614 struct nfs_server *server;
7615 struct nfs41_free_stateid_args args;
9aeda35f 7616 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7617};
7618
7619static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7620{
7621 struct nfs_free_stateid_data *data = calldata;
7622 nfs41_setup_sequence(nfs4_get_session(data->server),
7623 &data->args.seq_args,
7624 &data->res.seq_res,
7625 task);
7626}
7627
7628static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7629{
7630 struct nfs_free_stateid_data *data = calldata;
7631
7632 nfs41_sequence_done(task, &data->res.seq_res);
7633
7634 switch (task->tk_status) {
7635 case -NFS4ERR_DELAY:
7636 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7637 rpc_restart_call_prepare(task);
7638 }
7639}
7640
7641static void nfs41_free_stateid_release(void *calldata)
7642{
7643 kfree(calldata);
7644}
7645
17f26b12 7646static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7647 .rpc_call_prepare = nfs41_free_stateid_prepare,
7648 .rpc_call_done = nfs41_free_stateid_done,
7649 .rpc_release = nfs41_free_stateid_release,
7650};
7651
7652static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7653 nfs4_stateid *stateid,
ab7cb0df 7654 struct rpc_cred *cred,
7c1d5fae
TM		 7655 bool privileged)
7656{
9aeda35f
BS		 7657 struct rpc_message msg = {
7658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7659 .rpc_cred = cred,
9aeda35f 7660 };
7c1d5fae
TM		 7661 struct rpc_task_setup task_setup = {
7662 .rpc_client = server->client,
7663 .rpc_message = &msg,
7664 .callback_ops = &nfs41_free_stateid_ops,
7665 .flags = RPC_TASK_ASYNC,
7666 };
7667 struct nfs_free_stateid_data *data;
9aeda35f 7668
3787d506
WAA		 7669 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7670 &task_setup.rpc_client, &msg);
7671
38527b15 7672 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7673 data = kmalloc(sizeof(*data), GFP_NOFS);
7674 if (!data)
7675 return ERR_PTR(-ENOMEM);
7676 data->server = server;
7677 nfs4_stateid_copy(&data->args.stateid, stateid);
7678
7679 task_setup.callback_data = data;
7680
7681 msg.rpc_argp = &data->args;
7682 msg.rpc_resp = &data->res;
a9c92d6b 7683 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7684 if (privileged)
7685 nfs4_set_sequence_privileged(&data->args.seq_args);
7686
7687 return rpc_run_task(&task_setup);
9aeda35f
BS		 7688}
7689
38527b15
CL		 7690/**
7691 * nfs41_free_stateid - perform a FREE_STATEID operation
7692 *
7693 * @server: server / transport on which to perform the operation
7694 * @stateid: state ID to release
ab7cb0df 7695 * @cred: credential
38527b15
CL		 7696 *
7697 * Returns NFS_OK if the server freed "stateid". Otherwise a
7698 * negative NFS4ERR value is returned.
7699 */
ab7cb0df
TM		 7700static int nfs41_free_stateid(struct nfs_server *server,
7701 nfs4_stateid *stateid,
7702 struct rpc_cred *cred)
9aeda35f 7703{
7c1d5fae
TM		 7704 struct rpc_task *task;
7705 int ret;
7706
ab7cb0df 7707 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7708 if (IS_ERR(task))
7709 return PTR_ERR(task);
7710 ret = rpc_wait_for_completion_task(task);
7711 if (!ret)
7712 ret = task->tk_status;
7713 rpc_put_task(task);
7714 return ret;
9aeda35f 7715}
36281caa 7716
c8b2d0bf
TM		 7717static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7718{
7719 struct rpc_task *task;
ab7cb0df 7720 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7721
ab7cb0df 7722 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7723 nfs4_free_lock_state(server, lsp);
7724 if (IS_ERR(task))
7725 return PTR_ERR(task);
7726 rpc_put_task(task);
7727 return 0;
7728}
7729
36281caa
TM		 7730static bool nfs41_match_stateid(const nfs4_stateid *s1,
7731 const nfs4_stateid *s2)
7732{
2d2f24ad 7733 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7734 return false;
7735
2d2f24ad 7736 if (s1->seqid == s2->seqid)
36281caa 7737 return true;
2d2f24ad 7738 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7739 return true;
7740
7741 return false;
7742}
7743
557134a3
AA		 7744#endif /* CONFIG_NFS_V4_1 */
7745
36281caa
TM		 7746static bool nfs4_match_stateid(const nfs4_stateid *s1,
7747 const nfs4_stateid *s2)
7748{
f597c537 7749 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7750}
7751
7752
17280175 7753static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7754 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7755 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7756 .recover_open = nfs4_open_reclaim,
7757 .recover_lock = nfs4_lock_reclaim,
591d71cb 7758 .establish_clid = nfs4_init_clientid,
05f4c350 7759 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7760};
7761
591d71cb 7762#if defined(CONFIG_NFS_V4_1)
17280175 7763static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7764 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7765 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7766 .recover_open = nfs4_open_reclaim,
7767 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7768 .establish_clid = nfs41_init_clientid,
fce5c838 7769 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7770 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7771};
7772#endif /* CONFIG_NFS_V4_1 */
7773
17280175 7774static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7775 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7776 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7777 .recover_open = nfs4_open_expired,
7778 .recover_lock = nfs4_lock_expired,
7779 .establish_clid = nfs4_init_clientid,
7780};
7781
7782#if defined(CONFIG_NFS_V4_1)
17280175 7783static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7784 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7785 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7786 .recover_open = nfs41_open_expired,
7787 .recover_lock = nfs41_lock_expired,
4d643d1d 7788 .establish_clid = nfs41_init_clientid,
1da177e4 7789};
591d71cb 7790#endif /* CONFIG_NFS_V4_1 */
1da177e4 7791
17280175 7792static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7793 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7794 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7795 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7796};
7797
7798#if defined(CONFIG_NFS_V4_1)
17280175 7799static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7800 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7801 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7802 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7803};
7804#endif
7805
97dc1359
TM		 7806static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7807 .minor_version = 0,
39c6daae
TM		 7808 .init_caps = NFS_CAP_READDIRPLUS
7809 | NFS_CAP_ATOMIC_OPEN
7810 | NFS_CAP_CHANGE_ATTR
7811 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 7812 .init_client = nfs40_init_client,
7813 .shutdown_client = nfs40_shutdown_client,
36281caa 7814 .match_stateid = nfs4_match_stateid,
fca78d6d 7815 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7816 .free_lock_state = nfs4_release_lockowner,
9915ea7e 7817 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 7818 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7819 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7820 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7821};
7822
7823#if defined(CONFIG_NFS_V4_1)
7824static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7825 .minor_version = 1,
39c6daae
TM		 7826 .init_caps = NFS_CAP_READDIRPLUS
7827 | NFS_CAP_ATOMIC_OPEN
7828 | NFS_CAP_CHANGE_ATTR
3b66486c 7829 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7830 | NFS_CAP_STATEID_NFSV41
7831 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7832 .init_client = nfs41_init_client,
7833 .shutdown_client = nfs41_shutdown_client,
36281caa 7834 .match_stateid = nfs41_match_stateid,
fca78d6d 7835 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7836 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7837 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 7838 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7839 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7840 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7841};
7842#endif
7843
42c2c424
SD		 7844#if defined(CONFIG_NFS_V4_2)
7845static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7846 .minor_version = 2,
7017310a
BS		 7847 .init_caps = NFS_CAP_READDIRPLUS
7848 | NFS_CAP_ATOMIC_OPEN
7849 | NFS_CAP_CHANGE_ATTR
7850 | NFS_CAP_POSIX_LOCK
7851 | NFS_CAP_STATEID_NFSV41
7852 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7853 .init_client = nfs41_init_client,
7854 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 7855 .match_stateid = nfs41_match_stateid,
7856 .find_root_sec = nfs41_find_root_sec,
7017310a 7857 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7858 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 7859 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7860 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7861 .state_renewal_ops = &nfs41_state_renewal_ops,
7862};
7863#endif
7864
97dc1359
TM		 7865const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7866 [0] = &nfs_v4_0_minor_ops,
7867#if defined(CONFIG_NFS_V4_1)
7868 [1] = &nfs_v4_1_minor_ops,
7869#endif
42c2c424
SD		 7870#if defined(CONFIG_NFS_V4_2)
7871 [2] = &nfs_v4_2_minor_ops,
7872#endif
97dc1359
TM		 7873};
7874
17f26b12 7875static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7876 .create = nfs_create,
7877 .lookup = nfs_lookup,
7878 .atomic_open = nfs_atomic_open,
7879 .link = nfs_link,
7880 .unlink = nfs_unlink,
7881 .symlink = nfs_symlink,
7882 .mkdir = nfs_mkdir,
7883 .rmdir = nfs_rmdir,
7884 .mknod = nfs_mknod,
7885 .rename = nfs_rename,
7886 .permission = nfs_permission,
7887 .getattr = nfs_getattr,
7888 .setattr = nfs_setattr,
7889 .getxattr = generic_getxattr,
7890 .setxattr = generic_setxattr,
7891 .listxattr = generic_listxattr,
7892 .removexattr = generic_removexattr,
7893};
7894
92e1d5be 7895static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7896 .permission = nfs_permission,
7897 .getattr = nfs_getattr,
7898 .setattr = nfs_setattr,
64c2ce8b
AK		 7899 .getxattr = generic_getxattr,
7900 .setxattr = generic_setxattr,
7901 .listxattr = generic_listxattr,
7902 .removexattr = generic_removexattr,
6b3b5496
BF		 7903};
7904
509de811 7905const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7906 .version = 4, /* protocol version */
7907 .dentry_ops = &nfs4_dentry_operations,
7908 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7909 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7910 .file_ops = &nfs4_file_operations,
1da177e4 7911 .getroot = nfs4_proc_get_root,
281cad46 7912 .submount = nfs4_submount,
ff9099f2 7913 .try_mount = nfs4_try_mount,
1da177e4
LT		 7914 .getattr = nfs4_proc_getattr,
7915 .setattr = nfs4_proc_setattr,
7916 .lookup = nfs4_proc_lookup,
7917 .access = nfs4_proc_access,
7918 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7919 .create = nfs4_proc_create,
7920 .remove = nfs4_proc_remove,
7921 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7922 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7923 .unlink_done = nfs4_proc_unlink_done,
7924 .rename = nfs4_proc_rename,
d3d4152a 7925 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7926 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7927 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7928 .link = nfs4_proc_link,
7929 .symlink = nfs4_proc_symlink,
7930 .mkdir = nfs4_proc_mkdir,
7931 .rmdir = nfs4_proc_remove,
7932 .readdir = nfs4_proc_readdir,
7933 .mknod = nfs4_proc_mknod,
7934 .statfs = nfs4_proc_statfs,
7935 .fsinfo = nfs4_proc_fsinfo,
7936 .pathconf = nfs4_proc_pathconf,
e9326dca 7937 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7938 .decode_dirent = nfs4_decode_dirent,
7939 .read_setup = nfs4_proc_read_setup,
1abb5088 7940 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7941 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7942 .read_done = nfs4_read_done,
1da177e4 7943 .write_setup = nfs4_proc_write_setup,
57208fa7 7944 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7945 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7946 .write_done = nfs4_write_done,
1da177e4 7947 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7948 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7949 .commit_done = nfs4_commit_done,
1da177e4 7950 .lock = nfs4_proc_lock,
e50a1c2e 7951 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7952 .close_context = nfs4_close_context,
2b484297 7953 .open_context = nfs4_atomic_open,
011e2a7f 7954 .have_delegation = nfs4_have_delegation,
57ec14c5 7955 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7956 .alloc_client = nfs4_alloc_client,
45a52a02 7957 .init_client = nfs4_init_client,
cdb7eced 7958 .free_client = nfs4_free_client,
1179acc6
BS		 7959 .create_server = nfs4_create_server,
7960 .clone_server = nfs_clone_server,
1da177e4
LT		 7961};
7962
64c2ce8b
AK		 7963static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7964 .prefix = XATTR_NAME_NFSV4_ACL,
7965 .list = nfs4_xattr_list_nfs4_acl,
7966 .get = nfs4_xattr_get_nfs4_acl,
7967 .set = nfs4_xattr_set_nfs4_acl,
7968};
7969
7970const struct xattr_handler *nfs4_xattr_handlers[] = {
7971 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7972#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7973 &nfs4_xattr_nfs4_label_handler,
7974#endif
64c2ce8b
AK		 7975 NULL
7976};
7977
1da177e4
LT		 7978/*
7979 * Local variables:
7980 * c-basic-offset: 8
7981 * End:
7982 */
Linux 6.x block layer and io_uring tree(s)