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NFSv4.1: Allow parallel OPEN/OPEN_DOWNGRADE/CLOSE
[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 *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
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
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 188 | FATTR4_WORD1_TIME_MODIFY,
189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
191#endif
1da177e4
LT		 192};
193
1549210f
TM		 194static const u32 nfs4_pnfs_open_bitmap[3] = {
195 FATTR4_WORD0_TYPE
196 | FATTR4_WORD0_CHANGE
197 | FATTR4_WORD0_SIZE
198 | FATTR4_WORD0_FSID
199 | FATTR4_WORD0_FILEID,
200 FATTR4_WORD1_MODE
201 | FATTR4_WORD1_NUMLINKS
202 | FATTR4_WORD1_OWNER
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
210};
211
e23008ec
AA		 212static const u32 nfs4_open_noattr_bitmap[3] = {
213 FATTR4_WORD0_TYPE
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
216};
217
a09df2ca 218const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
225};
226
a09df2ca 227const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 228 FATTR4_WORD0_MAXLINK
229 | FATTR4_WORD0_MAXNAME,
230 0
231};
232
dae100c2 233const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
55b6e774 237 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 240};
241
a09df2ca 242const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 243 FATTR4_WORD0_TYPE
244 | FATTR4_WORD0_CHANGE
245 | FATTR4_WORD0_SIZE
246 | FATTR4_WORD0_FSID
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
249 FATTR4_WORD1_MODE
250 | FATTR4_WORD1_NUMLINKS
251 | FATTR4_WORD1_OWNER
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 259};
260
bc4785cd 261static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 262 struct nfs4_readdir_arg *readdir)
263{
0dbb4c67 264 __be32 *start, *p;
1da177e4 265
1da177e4 266 if (cookie > 2) {
b7ef1956 267 readdir->cookie = cookie;
1da177e4
LT		 268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
269 return;
270 }
271
272 readdir->cookie = 0;
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
274 if (cookie == 2)
275 return;
276
277 /*
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
282 * instead of 1 or 2.
283 */
2b86ce2d 284 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 285
286 if (cookie == 0) {
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
292 p++;
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
4e769b93 296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 297 }
298
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
304 p++;
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
4e769b93 308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 309
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
2b86ce2d 312 kunmap_atomic(start);
1da177e4
LT		 313}
314
8478eaa1
N		 315static long nfs4_update_delay(long *timeout)
316{
317 long ret;
318 if (!timeout)
319 return NFS4_POLL_RETRY_MAX;
320 if (*timeout <= 0)
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
324 ret = *timeout;
325 *timeout <<= 1;
326 return ret;
327}
328
65de872e
TM		 329static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
330{
331 int res = 0;
332
333 might_sleep();
334
8478eaa1
N		 335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
65de872e
TM		 337 if (fatal_signal_pending(current))
338 res = -ERESTARTSYS;
65de872e
TM		 339 return res;
340}
341
342/* This is the error handling routine for processes that are allowed
343 * to sleep.
344 */
f4ac1674 345int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 346{
347 struct nfs_client *clp = server->nfs_client;
9e33bed5 348 struct nfs4_state *state = exception->state;
3114ea7a 349 struct inode *inode = exception->inode;
65de872e
TM		 350 int ret = errorcode;
351
352 exception->retry = 0;
353 switch(errorcode) {
354 case 0:
355 return 0;
3114ea7a 356 case -NFS4ERR_OPENMODE:
011e2a7f 357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 358 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 359 exception->retry = 1;
360 return 0;
361 }
362 if (state == NULL)
363 break;
5d422301
TM		 364 ret = nfs4_schedule_stateid_recovery(server, state);
365 if (ret < 0)
366 break;
3114ea7a 367 goto wait_on_recovery;
a1d0b5ee 368 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e
TM		 416 case -NFS4ERR_GRACE:
417 case -NFS4ERR_DELAY:
418 ret = nfs4_delay(server->client, &exception->timeout);
419 if (ret != 0)
420 break;
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
a2c0b9e2 441 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
443 return -EIO;
a2c0b9e2
TM		 444 if (ret == 0)
445 exception->retry = 1;
446 return ret;
65de872e
TM		 447}
448
a5250def
WAA		 449/*
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
452 */
453static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
454{
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
456
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
459 return true;
460
461 return false;
462}
65de872e 463
452e9352 464static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 465{
1da177e4
LT		 466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
470}
471
452e9352
TM		 472static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
473{
474 do_renew_lease(server->nfs_client, timestamp);
475}
476
2a3eb2b9
CL		 477struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
481};
482
a9c92d6b
CL		 483static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
485{
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
489
490 res->sr_slot = NULL;
491}
492
493static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
494{
495 args->sa_privileged = 1;
496}
497
3bd2384a
CL		 498static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
502{
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
505
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
508 goto out_start;
509
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
512 goto out_sleep;
513
514 slot = nfs4_alloc_slot(tbl);
515 if (IS_ERR(slot)) {
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
518 goto out_sleep;
519 }
520 spin_unlock(&tbl->slot_tbl_lock);
521
522 args->sa_slot = slot;
523 res->sr_slot = slot;
524
525out_start:
526 rpc_call_start(task);
527 return 0;
528
529out_sleep:
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
533 else
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 return -EAGAIN;
537}
538
539static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
541{
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
544
cab92c19 545 if (slot == NULL)
3bd2384a
CL		 546 goto out;
547
548 tbl = slot->table;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
553
554 res->sr_slot = NULL;
555out:
556 return 1;
557}
558
cccef3b9
AA		 559#if defined(CONFIG_NFS_V4_1)
560
d185a334 561static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 562{
e3725ec0 563 struct nfs4_session *session;
13615871 564 struct nfs4_slot_table *tbl;
a13ce7c6 565 struct nfs4_slot *slot = res->sr_slot;
c10e4498 566 bool send_new_highest_used_slotid = false;
13615871 567
a13ce7c6 568 tbl = slot->table;
e3725ec0 569 session = tbl->session;
ea028ac9 570
35dc1d74 571 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
574 */
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
577
a13ce7c6 578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 579 send_new_highest_used_slotid = false;
580 goto out_unlock;
581 }
a13ce7c6 582 nfs4_free_slot(tbl, slot);
c10e4498
TM		 583
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
b75ad4cd 586out_unlock:
35dc1d74 587 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 588 res->sr_slot = NULL;
c10e4498
TM		 589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 591}
592
f9c96fcc 593int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 594{
e3725ec0 595 struct nfs4_session *session;
a13ce7c6 596 struct nfs4_slot *slot = res->sr_slot;
14516c3a 597 struct nfs_client *clp;
ac20d163 598 bool interrupted = false;
85563073 599 int ret = 1;
b0df806c 600
a13ce7c6
TM		 601 if (slot == NULL)
602 goto out_noaction;
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
e3725ec0 607 session = slot->table->session;
933602e3 608
ac20d163
TM		 609 if (slot->interrupted) {
610 slot->interrupted = 0;
611 interrupted = true;
612 }
613
2f92ae34 614 trace_nfs4_sequence_done(session, res);
691daf3b 615 /* Check the SEQUENCE operation status */
14516c3a
TM		 616 switch (res->sr_status) {
617 case 0:
b0df806c 618 /* Update the slot's sequence and clientid lease timer */
933602e3 619 ++slot->seq_nr;
e3725ec0 620 clp = session->clp;
8e63b6a8 621 do_renew_lease(clp, res->sr_timestamp);
0629e370 622 /* Check sequence flags */
b4410c2f
TM		 623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
464ee9f9 625 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 626 break;
ac20d163
TM		 627 case 1:
628 /*
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
631 * operation..
632 * Mark the slot as having hosted an interrupted RPC call.
633 */
634 slot->interrupted = 1;
635 goto out;
14516c3a
TM		 636 case -NFS4ERR_DELAY:
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
639 * of RFC5661.
640 */
df2fabff 641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 642 __func__,
df2fabff 643 slot->slot_nr,
933602e3 644 slot->seq_nr);
14516c3a 645 goto out_retry;
85563073
TM		 646 case -NFS4ERR_BADSLOT:
647 /*
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
650 */
e8794440
TM		 651 goto retry_nowait;
652 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 653 /*
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
656 */
657 if (interrupted) {
658 ++slot->seq_nr;
659 goto retry_nowait;
660 }
e8794440
TM		 661 /*
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
664 */
8e63b6a8
TM		 665 if (slot->seq_nr != 1) {
666 slot->seq_nr = 1;
667 goto retry_nowait;
668 }
669 break;
e8794440
TM		 670 case -NFS4ERR_SEQ_FALSE_RETRY:
671 ++slot->seq_nr;
672 goto retry_nowait;
14516c3a
TM		 673 default:
674 /* Just update the slot sequence no. */
933602e3 675 ++slot->seq_nr;
b0df806c
AA		 676 }
677out:
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 680 nfs41_sequence_free_slot(res);
a13ce7c6 681out_noaction:
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c 694}
f9c96fcc 695EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 696
14516c3a
TM		 697static int nfs4_sequence_done(struct rpc_task *task,
698 struct nfs4_sequence_res *res)
df896455 699{
e3725ec0 700 if (res->sr_slot == NULL)
14516c3a 701 return 1;
3bd2384a
CL		 702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
14516c3a 704 return nfs41_sequence_done(task, res);
df896455
TM		 705}
706
dc70d7b3 707int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
ce5039c1
AA		 710 struct rpc_task *task)
711{
fbcd4abc
AA		 712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 714
715 dprintk("--> %s\n", __func__);
ce5039c1 716 /* slot already allocated? */
dfb4f309 717 if (res->sr_slot != NULL)
d9afbd1b 718 goto out_success;
ce5039c1 719
fbcd4abc
AA		 720 tbl = &session->fc_slot_table;
721
69d206b5
TM		 722 task->tk_timeout = 0;
723
fbcd4abc 724 spin_lock(&tbl->slot_tbl_lock);
774d5f14 725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 726 !args->sa_privileged) {
0b1c8fc4 727 /* The state manager will wait until the slot table is empty */
0b1c8fc4 728 dprintk("%s session is draining\n", __func__);
7b939a3f 729 goto out_sleep;
689cf5c1
AB		 730 }
731
2dc03b7f 732 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 733 if (IS_ERR(slot)) {
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
fbcd4abc 737 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 738 goto out_sleep;
fbcd4abc
AA		 739 }
740 spin_unlock(&tbl->slot_tbl_lock);
741
2b2fa717 742 args->sa_slot = slot;
fbcd4abc 743
e8d92382 744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 745 slot->slot_nr, slot->seq_nr);
fbcd4abc 746
dfb4f309 747 res->sr_slot = slot;
8e63b6a8 748 res->sr_timestamp = jiffies;
2a6e26cd 749 res->sr_status_flags = 0;
fbcd4abc
AA		 750 /*
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
753 */
754 res->sr_status = 1;
2f92ae34 755 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 756out_success:
757 rpc_call_start(task);
ce5039c1 758 return 0;
7b939a3f 759out_sleep:
8fe72bac
TM		 760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
1e1093c7
TM		 762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
764 else
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 766 spin_unlock(&tbl->slot_tbl_lock);
767 return -EAGAIN;
ce5039c1 768}
dc70d7b3 769EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 770
5a580e0a
CL		 771static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
ce5039c1 775{
035168ab 776 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 777 int ret = 0;
778
3bd2384a
CL		 779 if (!session)
780 return nfs40_setup_sequence(server, args, res, task);
035168ab 781
e8d92382 782 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 783 __func__, session->clp, session, res->sr_slot ?
e8d92382 784 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 785
9d12b216 786 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 787
ce5039c1
AA		 788 dprintk("<-- %s status=%d\n", __func__, ret);
789 return ret;
790}
791
ce5039c1
AA		 792static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
793{
2a3eb2b9 794 struct nfs4_call_sync_data *data = calldata;
6ba7db34 795 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 796
035168ab
TM		 797 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
798
d9afbd1b 799 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 800}
801
69ab40c4
AA		 802static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
803{
2a3eb2b9 804 struct nfs4_call_sync_data *data = calldata;
69ab40c4 805
14516c3a 806 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 807}
808
17280175 809static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 810 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 811 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 812};
813
3bd2384a
CL		 814#else /* !CONFIG_NFS_V4_1 */
815
9915ea7e
CL		 816static int nfs4_setup_sequence(const struct nfs_server *server,
817 struct nfs4_sequence_args *args,
818 struct nfs4_sequence_res *res,
819 struct rpc_task *task)
820{
3bd2384a 821 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 822}
823
824static int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
3bd2384a
CL		 829
830#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 831
832static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
833{
834 struct nfs4_call_sync_data *data = calldata;
835 nfs4_setup_sequence(data->seq_server,
836 data->seq_args, data->seq_res, task);
837}
838
839static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_sequence_done(task, data->seq_res);
843}
844
845static const struct rpc_call_ops nfs40_call_sync_ops = {
846 .rpc_call_prepare = nfs40_call_sync_prepare,
847 .rpc_call_done = nfs40_call_sync_done,
848};
849
7c513058
BS		 850static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
851 struct nfs_server *server,
ce5039c1
AA		 852 struct rpc_message *msg,
853 struct nfs4_sequence_args *args,
8fe72bac 854 struct nfs4_sequence_res *res)
ce5039c1
AA		 855{
856 int ret;
857 struct rpc_task *task;
9915ea7e 858 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 859 struct nfs4_call_sync_data data = {
035168ab 860 .seq_server = server,
ce5039c1
AA		 861 .seq_args = args,
862 .seq_res = res,
ce5039c1
AA		 863 };
864 struct rpc_task_setup task_setup = {
7c513058 865 .rpc_client = clnt,
ce5039c1 866 .rpc_message = msg,
9915ea7e 867 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 868 .callback_data = &data
869 };
870
ce5039c1
AA		 871 task = rpc_run_task(&task_setup);
872 if (IS_ERR(task))
873 ret = PTR_ERR(task);
874 else {
875 ret = task->tk_status;
876 rpc_put_task(task);
877 }
878 return ret;
879}
880
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 980 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 981 struct nfs4_opendata *p;
982
8535b2be 983 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 984 if (p == NULL)
985 goto err;
14c43f76
DQ		 986
987 p->f_label = nfs4_label_alloc(server, gfp_mask);
988 if (IS_ERR(p->f_label))
989 goto err_free_p;
990
63f5f796
TM		 991 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
992 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 993 if (IS_ERR(p->o_arg.seqid))
14c43f76 994 goto err_free_label;
82a2c1b7
AV		 995 nfs_sb_active(dentry->d_sb);
996 p->dentry = dget(dentry);
e56e0b78
TM		 997 p->dir = parent;
998 p->owner = sp;
999 atomic_inc(&sp->so_count);
dc0b027d
TM		 1000 p->o_arg.open_flags = flags;
1001 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1002 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1003 * will return permission denied for all bits until close */
1004 if (!(flags & O_EXCL)) {
1005 /* ask server to check for all possible rights as results
1006 * are cached */
1007 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1008 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1009 }
7539bbab 1010 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1011 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1012 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1013 p->o_arg.name = &dentry->d_name;
e56e0b78 1014 p->o_arg.server = server;
aa9c2669 1015 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1016 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1017 p->o_arg.label = label;
49f9a0fa
TM		 1018 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1019 switch (p->o_arg.claim) {
4a1c0893
TM		 1020 case NFS4_OPEN_CLAIM_NULL:
1021 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1022 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1023 p->o_arg.fh = NFS_FH(dir);
1024 break;
1025 case NFS4_OPEN_CLAIM_PREVIOUS:
1026 case NFS4_OPEN_CLAIM_FH:
1027 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1028 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1029 p->o_arg.fh = NFS_FH(dentry->d_inode);
1030 }
536e43d1 1031 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1032 __u32 verf[2];
d77d76ff 1033
e56e0b78
TM		 1034 p->o_arg.u.attrs = &p->attrs;
1035 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1036
1037 verf[0] = jiffies;
1038 verf[1] = current->pid;
1039 memcpy(p->o_arg.u.verifier.data, verf,
1040 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1041 }
cdd4e68b
TM		 1042 p->c_arg.fh = &p->o_res.fh;
1043 p->c_arg.stateid = &p->o_res.stateid;
1044 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1045 nfs4_init_opendata_res(p);
c6d00e63 1046 kref_init(&p->kref);
e56e0b78 1047 return p;
14c43f76
DQ		 1048
1049err_free_label:
1050 nfs4_label_free(p->f_label);
1051err_free_p:
e56e0b78
TM		 1052 kfree(p);
1053err:
1054 dput(parent);
1055 return NULL;
1056}
1057
c6d00e63 1058static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1059{
c6d00e63
TM		 1060 struct nfs4_opendata *p = container_of(kref,
1061 struct nfs4_opendata, kref);
82a2c1b7 1062 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1063
1064 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1065 if (p->state != NULL)
1066 nfs4_put_open_state(p->state);
c6d00e63 1067 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1068
1069 nfs4_label_free(p->f_label);
1070
c6d00e63 1071 dput(p->dir);
82a2c1b7
AV		 1072 dput(p->dentry);
1073 nfs_sb_deactive(sb);
6926afd1 1074 nfs_fattr_free_names(&p->f_attr);
e911b815 1075 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1076 kfree(p);
1077}
1078
1079static void nfs4_opendata_put(struct nfs4_opendata *p)
1080{
1081 if (p != NULL)
1082 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1083}
1084
06f814a3
TM		 1085static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1086{
06f814a3
TM		 1087 int ret;
1088
06f814a3 1089 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1090 return ret;
1091}
1092
dc0b027d 1093static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1094{
1095 int ret = 0;
dc0b027d 1096
536e43d1 1097 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1098 goto out;
1099 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1100 case FMODE_READ:
88069f77
TM		 1101 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1102 && state->n_rdonly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1106 && state->n_wronly != 0;
6ee41268
TM		 1107 break;
1108 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1109 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1110 && state->n_rdwr != 0;
6ee41268 1111 }
dc0b027d 1112out:
6ee41268
TM		 1113 return ret;
1114}
1115
dc0b027d 1116static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1117{
652f89f6
TM		 1118 if (delegation == NULL)
1119 return 0;
dc0b027d 1120 if ((delegation->type & fmode) != fmode)
aac00a8d 1121 return 0;
d25be546
TM		 1122 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1123 return 0;
b7391f44 1124 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1125 return 1;
1126}
1127
dc0b027d 1128static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1129{
dc0b027d 1130 switch (fmode) {
e7616923
TM		 1131 case FMODE_WRITE:
1132 state->n_wronly++;
1133 break;
1134 case FMODE_READ:
1135 state->n_rdonly++;
1136 break;
1137 case FMODE_READ|FMODE_WRITE:
1138 state->n_rdwr++;
1139 }
dc0b027d 1140 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1141}
1142
4f14c194
TM		 1143static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1144{
1145 struct nfs_client *clp = state->owner->so_server->nfs_client;
1146 bool need_recover = false;
1147
1148 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1151 need_recover = true;
1152 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1153 need_recover = true;
1154 if (need_recover)
1155 nfs4_state_mark_reclaim_nograce(clp, state);
1156}
1157
e999e80e
TM		 1158static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1159 nfs4_stateid *stateid)
1160{
1161 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1162 return true;
4f14c194
TM		 1163 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1164 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1165 return true;
4f14c194 1166 }
e999e80e
TM		 1167 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1168 return true;
1169 return false;
1170}
1171
f95549cf
TM		 1172static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1173{
1174 if (state->n_wronly)
1175 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1176 if (state->n_rdonly)
1177 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1178 if (state->n_rdwr)
1179 set_bit(NFS_O_RDWR_STATE, &state->flags);
1180}
1181
226056c5
TM		 1182static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1183 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1184{
226056c5
TM		 1185 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1186 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1187 case FMODE_WRITE:
1188 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1189 break;
1190 case FMODE_READ:
1191 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1192 break;
1193 case 0:
1194 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1195 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1196 clear_bit(NFS_OPEN_STATE, &state->flags);
1197 }
1198 if (stateid == NULL)
1199 return;
f95549cf
TM		 1200 /* Handle races with OPEN */
1201 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1202 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1203 nfs_resync_open_stateid_locked(state);
226056c5 1204 return;
f95549cf 1205 }
003707c7 1206 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1207 nfs4_stateid_copy(&state->stateid, stateid);
1208 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1209}
1210
1211static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1212{
1213 write_seqlock(&state->seqlock);
1214 nfs_clear_open_stateid_locked(state, stateid, fmode);
1215 write_sequnlock(&state->seqlock);
4f14c194
TM		 1216 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1217 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1218}
1219
dc0b027d 1220static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1221{
dc0b027d 1222 switch (fmode) {
003707c7
TM		 1223 case FMODE_READ:
1224 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1225 break;
1226 case FMODE_WRITE:
1227 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1228 break;
1229 case FMODE_READ|FMODE_WRITE:
1230 set_bit(NFS_O_RDWR_STATE, &state->flags);
1231 }
e999e80e
TM		 1232 if (!nfs_need_update_open_stateid(state, stateid))
1233 return;
1234 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1235 nfs4_stateid_copy(&state->stateid, stateid);
1236 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1237}
1238
dc0b027d 1239static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1240{
8bda4e4c
TM		 1241 /*
1242 * Protect the call to nfs4_state_set_mode_locked and
1243 * serialise the stateid update
1244 */
1245 write_seqlock(&state->seqlock);
003707c7 1246 if (deleg_stateid != NULL) {
f597c537 1247 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1248 set_bit(NFS_DELEGATED_STATE, &state->flags);
1249 }
1250 if (open_stateid != NULL)
dc0b027d 1251 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1252 write_sequnlock(&state->seqlock);
1253 spin_lock(&state->owner->so_lock);
dc0b027d 1254 update_open_stateflags(state, fmode);
ec073428 1255 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1256}
1257
dc0b027d 1258static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1259{
1260 struct nfs_inode *nfsi = NFS_I(state->inode);
1261 struct nfs_delegation *deleg_cur;
1262 int ret = 0;
1263
dc0b027d 1264 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1265
1266 rcu_read_lock();
1267 deleg_cur = rcu_dereference(nfsi->delegation);
1268 if (deleg_cur == NULL)
1269 goto no_delegation;
1270
1271 spin_lock(&deleg_cur->lock);
17f26b12 1272 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1273 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1274 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1275 goto no_delegation_unlock;
1276
1277 if (delegation == NULL)
1278 delegation = &deleg_cur->stateid;
f597c537 1279 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1280 goto no_delegation_unlock;
1281
b7391f44 1282 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1283 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1284 ret = 1;
1285no_delegation_unlock:
1286 spin_unlock(&deleg_cur->lock);
1287no_delegation:
1288 rcu_read_unlock();
1289
1290 if (!ret && open_stateid != NULL) {
dc0b027d 1291 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1292 ret = 1;
1293 }
4f14c194
TM		 1294 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1295 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1296
1297 return ret;
1298}
1299
1300
dc0b027d 1301static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1302{
1303 struct nfs_delegation *delegation;
1304
1305 rcu_read_lock();
1306 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1307 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1308 rcu_read_unlock();
1309 return;
1310 }
1311 rcu_read_unlock();
57ec14c5 1312 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1313}
1314
6ee41268 1315static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1316{
1317 struct nfs4_state *state = opendata->state;
1318 struct nfs_inode *nfsi = NFS_I(state->inode);
1319 struct nfs_delegation *delegation;
f448badd 1320 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1321 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1322 nfs4_stateid stateid;
1323 int ret = -EAGAIN;
1324
aac00a8d 1325 for (;;) {
61beef75 1326 spin_lock(&state->owner->so_lock);
dc0b027d 1327 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1328 update_open_stateflags(state, fmode);
6ee41268 1329 spin_unlock(&state->owner->so_lock);
61beef75 1330 goto out_return_state;
6ee41268 1331 }
61beef75 1332 spin_unlock(&state->owner->so_lock);
34310430
TM		 1333 rcu_read_lock();
1334 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1335 if (!can_open_delegated(delegation, fmode)) {
34310430 1336 rcu_read_unlock();
aac00a8d 1337 break;
34310430 1338 }
aac00a8d 1339 /* Save the delegation */
f597c537 1340 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1341 rcu_read_unlock();
fa332941 1342 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1343 if (!opendata->is_recover) {
1344 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1345 if (ret != 0)
1346 goto out;
1347 }
aac00a8d 1348 ret = -EAGAIN;
34310430
TM		 1349
1350 /* Try to update the stateid using the delegation */
dc0b027d 1351 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1352 goto out_return_state;
aac00a8d 1353 }
aac00a8d
TM		 1354out:
1355 return ERR_PTR(ret);
1356out_return_state:
1357 atomic_inc(&state->count);
1358 return state;
1359}
1360
e23008ec
AA		 1361static void
1362nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1363{
1364 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1365 struct nfs_delegation *delegation;
1366 int delegation_flags = 0;
1367
1368 rcu_read_lock();
1369 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1370 if (delegation)
1371 delegation_flags = delegation->flags;
1372 rcu_read_unlock();
1373 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1374 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1375 "returning a delegation for "
1376 "OPEN(CLAIM_DELEGATE_CUR)\n",
1377 clp->cl_hostname);
1378 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1379 nfs_inode_set_delegation(state->inode,
1380 data->owner->so_cred,
1381 &data->o_res);
1382 else
1383 nfs_inode_reclaim_delegation(state->inode,
1384 data->owner->so_cred,
1385 &data->o_res);
1386}
1387
1388/*
1389 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1390 * and update the nfs4_state.
1391 */
1392static struct nfs4_state *
1393_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1394{
1395 struct inode *inode = data->state->inode;
1396 struct nfs4_state *state = data->state;
1397 int ret;
1398
d2bfda2e
WAA		 1399 if (!data->rpc_done) {
1400 if (data->rpc_status) {
1401 ret = data->rpc_status;
1402 goto err;
1403 }
1404 /* cached opens have already been processed */
1405 goto update;
e23008ec
AA		 1406 }
1407
e23008ec
AA		 1408 ret = nfs_refresh_inode(inode, &data->f_attr);
1409 if (ret)
1410 goto err;
1411
1412 if (data->o_res.delegation_type != 0)
1413 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1414update:
e23008ec
AA		 1415 update_open_stateid(state, &data->o_res.stateid, NULL,
1416 data->o_arg.fmode);
d49f042a 1417 atomic_inc(&state->count);
e23008ec
AA		 1418
1419 return state;
1420err:
1421 return ERR_PTR(ret);
1422
1423}
1424
1425static struct nfs4_state *
1426_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1427{
1428 struct inode *inode;
1429 struct nfs4_state *state = NULL;
1b370bc2 1430 int ret;
24ac23ab 1431
aac00a8d 1432 if (!data->rpc_done) {
6ee41268 1433 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1434 goto out;
1435 }
1436
1b370bc2 1437 ret = -EAGAIN;
24ac23ab 1438 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1439 goto err;
1775fd3e 1440 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1441 ret = PTR_ERR(inode);
03f28e3a 1442 if (IS_ERR(inode))
1b370bc2
TM		 1443 goto err;
1444 ret = -ENOMEM;
24ac23ab
TM		 1445 state = nfs4_get_open_state(inode, data->owner);
1446 if (state == NULL)
1b370bc2 1447 goto err_put_inode;
e23008ec
AA		 1448 if (data->o_res.delegation_type != 0)
1449 nfs4_opendata_check_deleg(data, state);
34310430 1450 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1451 data->o_arg.fmode);
24ac23ab 1452 iput(inode);
aac00a8d 1453out:
7aa262b5 1454 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1455 return state;
1b370bc2
TM		 1456err_put_inode:
1457 iput(inode);
1458err:
1459 return ERR_PTR(ret);
24ac23ab
TM		 1460}
1461
e23008ec
AA		 1462static struct nfs4_state *
1463nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1464{
1465 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1466 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1467 return _nfs4_opendata_to_nfs4_state(data);
1468}
1469
864472e9
TM		 1470static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1471{
1472 struct nfs_inode *nfsi = NFS_I(state->inode);
1473 struct nfs_open_context *ctx;
1474
1475 spin_lock(&state->inode->i_lock);
1476 list_for_each_entry(ctx, &nfsi->open_files, list) {
1477 if (ctx->state != state)
1478 continue;
1479 get_nfs_open_context(ctx);
1480 spin_unlock(&state->inode->i_lock);
1481 return ctx;
1482 }
1483 spin_unlock(&state->inode->i_lock);
1484 return ERR_PTR(-ENOENT);
1485}
1486
4a1c0893
TM		 1487static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1488 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1489{
1490 struct nfs4_opendata *opendata;
1491
4a1c0893 1492 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1493 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1494 if (opendata == NULL)
1495 return ERR_PTR(-ENOMEM);
1496 opendata->state = state;
1497 atomic_inc(&state->count);
1498 return opendata;
1499}
1500
dc0b027d 1501static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1502{
2ced46c2 1503 struct nfs4_state *newstate;
864472e9
TM		 1504 int ret;
1505
dc0b027d
TM		 1506 opendata->o_arg.open_flags = 0;
1507 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1508 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1509 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1510 nfs4_init_opendata_res(opendata);
b257957e 1511 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1512 if (ret != 0)
1513 return ret;
2ced46c2 1514 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1515 if (IS_ERR(newstate))
1516 return PTR_ERR(newstate);
643168c2 1517 nfs4_close_state(newstate, fmode);
2ced46c2 1518 *res = newstate;
864472e9
TM		 1519 return 0;
1520}
1521
1522static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1523{
864472e9 1524 struct nfs4_state *newstate;
864472e9
TM		 1525 int ret;
1526
4f14c194
TM		 1527 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1528 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1529 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1530 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1531 /* memory barrier prior to reading state->n_* */
2ced46c2 1532 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1533 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1534 smp_rmb();
1535 if (state->n_rdwr != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9
TM		 1541 }
1542 if (state->n_wronly != 0) {
2ced46c2 1543 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1544 if (ret != 0)
1545 return ret;
2ced46c2
TM		 1546 if (newstate != state)
1547 return -ESTALE;
864472e9
TM		 1548 }
1549 if (state->n_rdonly != 0) {
2ced46c2 1550 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1551 if (ret != 0)
1552 return ret;
2ced46c2
TM		 1553 if (newstate != state)
1554 return -ESTALE;
864472e9 1555 }
1ac7e2fd
TM		 1556 /*
1557 * We may have performed cached opens for all three recoveries.
1558 * Check if we need to update the current stateid.
1559 */
1560 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1561 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1562 write_seqlock(&state->seqlock);
1ac7e2fd 1563 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1564 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1565 write_sequnlock(&state->seqlock);
1ac7e2fd 1566 }
864472e9
TM		 1567 return 0;
1568}
1569
1da177e4
LT		 1570/*
1571 * OPEN_RECLAIM:
1572 * reclaim state on the server after a reboot.
1da177e4 1573 */
539cd03a 1574static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1575{
1ac7e2fd 1576 struct nfs_delegation *delegation;
864472e9 1577 struct nfs4_opendata *opendata;
dc0b027d 1578 fmode_t delegation_type = 0;
1da177e4
LT		 1579 int status;
1580
4a1c0893
TM		 1581 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1582 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1583 if (IS_ERR(opendata))
1584 return PTR_ERR(opendata);
1ac7e2fd
TM		 1585 rcu_read_lock();
1586 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1587 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1588 delegation_type = delegation->type;
1ac7e2fd 1589 rcu_read_unlock();
864472e9
TM		 1590 opendata->o_arg.u.delegation_type = delegation_type;
1591 status = nfs4_open_recover(opendata, state);
c6d00e63 1592 nfs4_opendata_put(opendata);
1da177e4
LT		 1593 return status;
1594}
1595
539cd03a 1596static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1597{
1598 struct nfs_server *server = NFS_SERVER(state->inode);
1599 struct nfs4_exception exception = { };
1600 int err;
1601 do {
539cd03a 1602 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1603 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1604 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1605 continue;
168667c4 1606 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1607 break;
1608 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1609 } while (exception.retry);
1610 return err;
1611}
1612
864472e9
TM		 1613static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1614{
1615 struct nfs_open_context *ctx;
1616 int ret;
1617
1618 ctx = nfs4_state_find_open_context(state);
1619 if (IS_ERR(ctx))
91876b13 1620 return -EAGAIN;
539cd03a 1621 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1622 put_nfs_open_context(ctx);
1623 return ret;
1624}
1625
db4f2e63 1626static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1627{
be76b5b6
TM		 1628 switch (err) {
1629 default:
1630 printk(KERN_ERR "NFS: %s: unhandled error "
1631 "%d.\n", __func__, err);
1632 case 0:
1633 case -ENOENT:
1634 case -ESTALE:
1635 break;
1636 case -NFS4ERR_BADSESSION:
1637 case -NFS4ERR_BADSLOT:
1638 case -NFS4ERR_BAD_HIGH_SLOT:
1639 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1640 case -NFS4ERR_DEADSESSION:
1641 set_bit(NFS_DELEGATED_STATE, &state->flags);
1642 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1643 return -EAGAIN;
1644 case -NFS4ERR_STALE_CLIENTID:
1645 case -NFS4ERR_STALE_STATEID:
1646 set_bit(NFS_DELEGATED_STATE, &state->flags);
1647 case -NFS4ERR_EXPIRED:
1648 /* Don't recall a delegation if it was lost */
1649 nfs4_schedule_lease_recovery(server->nfs_client);
1650 return -EAGAIN;
352297b9
CL		 1651 case -NFS4ERR_MOVED:
1652 nfs4_schedule_migration_recovery(server);
1653 return -EAGAIN;
8ef2f8d4
CL		 1654 case -NFS4ERR_LEASE_MOVED:
1655 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1656 return -EAGAIN;
be76b5b6
TM		 1657 case -NFS4ERR_DELEG_REVOKED:
1658 case -NFS4ERR_ADMIN_REVOKED:
1659 case -NFS4ERR_BAD_STATEID:
db4f2e63 1660 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1661 nfs_inode_find_state_and_recover(state->inode,
1662 stateid);
1663 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1664 return -EAGAIN;
be76b5b6
TM		 1665 case -NFS4ERR_DELAY:
1666 case -NFS4ERR_GRACE:
1667 set_bit(NFS_DELEGATED_STATE, &state->flags);
1668 ssleep(1);
1669 return -EAGAIN;
db4f2e63
TM		 1670 case -ENOMEM:
1671 case -NFS4ERR_DENIED:
1672 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1673 return 0;
be76b5b6 1674 }
1da177e4
LT		 1675 return err;
1676}
1677
db4f2e63
TM		 1678int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1679{
1680 struct nfs_server *server = NFS_SERVER(state->inode);
1681 struct nfs4_opendata *opendata;
1682 int err;
1683
1684 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1685 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1686 if (IS_ERR(opendata))
1687 return PTR_ERR(opendata);
1688 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1689 err = nfs4_open_recover(opendata, state);
1690 nfs4_opendata_put(opendata);
1691 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1692}
1693
be05c860
CL		 1694static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1695{
1696 struct nfs4_opendata *data = calldata;
1697
17ead6c8
TM		 1698 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1699 &data->c_res.seq_res, task);
be05c860
CL		 1700}
1701
cdd4e68b
TM		 1702static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1703{
1704 struct nfs4_opendata *data = calldata;
1705
17ead6c8 1706 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1707
cdd4e68b 1708 data->rpc_status = task->tk_status;
26e976a8 1709 if (data->rpc_status == 0) {
f597c537 1710 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1711 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1712 renew_lease(data->o_res.server, data->timestamp);
3e309914 1713 data->rpc_done = 1;
26e976a8 1714 }
cdd4e68b
TM		 1715}
1716
1717static void nfs4_open_confirm_release(void *calldata)
1718{
1719 struct nfs4_opendata *data = calldata;
1720 struct nfs4_state *state = NULL;
1721
1722 /* If this request hasn't been cancelled, do nothing */
1723 if (data->cancelled == 0)
1724 goto out_free;
1725 /* In case of error, no cleanup! */
3e309914 1726 if (!data->rpc_done)
cdd4e68b 1727 goto out_free;
cdd4e68b 1728 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1729 if (!IS_ERR(state))
643168c2 1730 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1731out_free:
c6d00e63 1732 nfs4_opendata_put(data);
cdd4e68b
TM		 1733}
1734
1735static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1736 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1737 .rpc_call_done = nfs4_open_confirm_done,
1738 .rpc_release = nfs4_open_confirm_release,
1739};
1740
1741/*
1742 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1743 */
1744static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1745{
1746 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1747 struct rpc_task *task;
5138fde0
TM		 1748 struct rpc_message msg = {
1749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1750 .rpc_argp = &data->c_arg,
1751 .rpc_resp = &data->c_res,
1752 .rpc_cred = data->owner->so_cred,
1753 };
c970aa85
TM		 1754 struct rpc_task_setup task_setup_data = {
1755 .rpc_client = server->client,
5138fde0 1756 .rpc_message = &msg,
c970aa85
TM		 1757 .callback_ops = &nfs4_open_confirm_ops,
1758 .callback_data = data,
101070ca 1759 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1760 .flags = RPC_TASK_ASYNC,
1761 };
1da177e4
LT		 1762 int status;
1763
17ead6c8 1764 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1765 kref_get(&data->kref);
3e309914
TM		 1766 data->rpc_done = 0;
1767 data->rpc_status = 0;
5138fde0 1768 data->timestamp = jiffies;
c970aa85 1769 task = rpc_run_task(&task_setup_data);
7a1218a2 1770 if (IS_ERR(task))
cdd4e68b 1771 return PTR_ERR(task);
cdd4e68b
TM		 1772 status = nfs4_wait_for_completion_rpc_task(task);
1773 if (status != 0) {
1774 data->cancelled = 1;
1775 smp_wmb();
1776 } else
1777 status = data->rpc_status;
e6b3c4db 1778 rpc_put_task(task);
1da177e4
LT		 1779 return status;
1780}
1781
24ac23ab 1782static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1783{
24ac23ab
TM		 1784 struct nfs4_opendata *data = calldata;
1785 struct nfs4_state_owner *sp = data->owner;
549b19cc 1786 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1787
24ac23ab 1788 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1789 goto out_wait;
aac00a8d
TM		 1790 /*
1791 * Check if we still need to send an OPEN call, or if we can use
1792 * a delegation instead.
1793 */
1794 if (data->state != NULL) {
1795 struct nfs_delegation *delegation;
1796
dc0b027d 1797 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1798 goto out_no_action;
aac00a8d
TM		 1799 rcu_read_lock();
1800 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1801 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1802 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1803 can_open_delegated(delegation, data->o_arg.fmode))
1804 goto unlock_no_action;
aac00a8d
TM		 1805 rcu_read_unlock();
1806 }
95b72eb0 1807 /* Update client id. */
549b19cc 1808 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1809 switch (data->o_arg.claim) {
1810 case NFS4_OPEN_CLAIM_PREVIOUS:
1811 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1812 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1813 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1814 case NFS4_OPEN_CLAIM_FH:
1815 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1816 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1817 }
26e976a8 1818 data->timestamp = jiffies;
035168ab 1819 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1820 &data->o_arg.seq_args,
2240a9e2
TM		 1821 &data->o_res.seq_res,
1822 task) != 0)
1823 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1824
1825 /* Set the create mode (note dependency on the session type) */
1826 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1827 if (data->o_arg.open_flags & O_EXCL) {
1828 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1829 if (nfs4_has_persistent_session(clp))
1830 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1831 else if (clp->cl_mvops->minor_version > 0)
1832 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1833 }
6ee41268 1834 return;
652f89f6
TM		 1835unlock_no_action:
1836 rcu_read_unlock();
6ee41268
TM		 1837out_no_action:
1838 task->tk_action = NULL;
c8da19b9 1839out_wait:
b75ad4cd 1840 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1841}
1842
24ac23ab
TM		 1843static void nfs4_open_done(struct rpc_task *task, void *calldata)
1844{
1845 struct nfs4_opendata *data = calldata;
1da177e4 1846
24ac23ab 1847 data->rpc_status = task->tk_status;
d898528c 1848
14516c3a
TM		 1849 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1850 return;
d898528c 1851
24ac23ab 1852 if (task->tk_status == 0) {
807d66d8
TM		 1853 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1854 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1855 case S_IFREG:
1856 break;
1857 case S_IFLNK:
24ac23ab 1858 data->rpc_status = -ELOOP;
6f926b5b
TM		 1859 break;
1860 case S_IFDIR:
24ac23ab 1861 data->rpc_status = -EISDIR;
6f926b5b
TM		 1862 break;
1863 default:
24ac23ab 1864 data->rpc_status = -ENOTDIR;
807d66d8 1865 }
6f926b5b 1866 }
26e976a8 1867 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1868 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1869 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1870 }
3e309914 1871 data->rpc_done = 1;
24ac23ab 1872}
6f926b5b 1873
24ac23ab
TM		 1874static void nfs4_open_release(void *calldata)
1875{
1876 struct nfs4_opendata *data = calldata;
1877 struct nfs4_state *state = NULL;
1878
1879 /* If this request hasn't been cancelled, do nothing */
1880 if (data->cancelled == 0)
1881 goto out_free;
1882 /* In case of error, no cleanup! */
3e309914 1883 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1884 goto out_free;
1885 /* In case we need an open_confirm, no cleanup! */
1886 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1887 goto out_free;
24ac23ab 1888 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1889 if (!IS_ERR(state))
643168c2 1890 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1891out_free:
c6d00e63 1892 nfs4_opendata_put(data);
24ac23ab
TM		 1893}
1894
1895static const struct rpc_call_ops nfs4_open_ops = {
1896 .rpc_call_prepare = nfs4_open_prepare,
1897 .rpc_call_done = nfs4_open_done,
1898 .rpc_release = nfs4_open_release,
1899};
1900
b257957e 1901static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1902{
1903 struct inode *dir = data->dir->d_inode;
1904 struct nfs_server *server = NFS_SERVER(dir);
1905 struct nfs_openargs *o_arg = &data->o_arg;
1906 struct nfs_openres *o_res = &data->o_res;
1907 struct rpc_task *task;
5138fde0
TM		 1908 struct rpc_message msg = {
1909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1910 .rpc_argp = o_arg,
1911 .rpc_resp = o_res,
1912 .rpc_cred = data->owner->so_cred,
1913 };
c970aa85
TM		 1914 struct rpc_task_setup task_setup_data = {
1915 .rpc_client = server->client,
5138fde0 1916 .rpc_message = &msg,
c970aa85
TM		 1917 .callback_ops = &nfs4_open_ops,
1918 .callback_data = data,
101070ca 1919 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1920 .flags = RPC_TASK_ASYNC,
1921 };
24ac23ab
TM		 1922 int status;
1923
a9c92d6b 1924 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1925 kref_get(&data->kref);
3e309914
TM		 1926 data->rpc_done = 0;
1927 data->rpc_status = 0;
2ced46c2 1928 data->cancelled = 0;
bdeca1b7
TM		 1929 data->is_recover = 0;
1930 if (isrecover) {
8fe72bac 1931 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1932 data->is_recover = 1;
1933 }
c970aa85 1934 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1935 if (IS_ERR(task))
1936 return PTR_ERR(task);
1937 status = nfs4_wait_for_completion_rpc_task(task);
1938 if (status != 0) {
1939 data->cancelled = 1;
1940 smp_wmb();
1941 } else
1942 status = data->rpc_status;
1943 rpc_put_task(task);
1944
1945 return status;
1946}
1947
1948static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1949{
1950 struct inode *dir = data->dir->d_inode;
1951 struct nfs_openres *o_res = &data->o_res;
1952 int status;
1953
1954 status = nfs4_run_open_task(data, 1);
1955 if (status != 0 || !data->rpc_done)
1956 return status;
1957
6926afd1
TM		 1958 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1959
b257957e
AB		 1960 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1961 status = _nfs4_proc_open_confirm(data);
1962 if (status != 0)
1963 return status;
1964 }
1965
1966 return status;
1967}
1968
f3792d63
TM		 1969/*
1970 * Additional permission checks in order to distinguish between an
1971 * open for read, and an open for execute. This works around the
1972 * fact that NFSv4 OPEN treats read and execute permissions as being
1973 * the same.
1974 * Note that in the non-execute case, we want to turn off permission
1975 * checking if we just created a new file (POSIX open() semantics).
1976 */
6168f62c
WAA		 1977static int nfs4_opendata_access(struct rpc_cred *cred,
1978 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1979 struct nfs4_state *state, fmode_t fmode,
1980 int openflags)
6168f62c
WAA		 1981{
1982 struct nfs_access_entry cache;
1983 u32 mask;
1984
1985 /* access call failed or for some reason the server doesn't
1986 * support any access modes -- defer access call until later */
1987 if (opendata->o_res.access_supported == 0)
1988 return 0;
1989
1990 mask = 0;
f3792d63
TM		 1991 /*
1992 * Use openflags to check for exec, because fmode won't
1993 * always have FMODE_EXEC set when file open for exec.
1994 */
f8d9a897
WAA		 1995 if (openflags & __FMODE_EXEC) {
1996 /* ONLY check for exec rights */
1997 mask = MAY_EXEC;
f3792d63 1998 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1999 mask = MAY_READ;
6168f62c
WAA		 2000
2001 cache.cred = cred;
2002 cache.jiffies = jiffies;
2003 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2004 nfs_access_add_cache(state->inode, &cache);
2005
bbd3a8ee 2006 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2007 return 0;
2008
2009 /* even though OPEN succeeded, access is denied. Close the file */
2010 nfs4_close_state(state, fmode);
998f40b5 2011 return -EACCES;
6168f62c
WAA		 2012}
2013
b257957e
AB		 2014/*
2015 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2016 */
2017static int _nfs4_proc_open(struct nfs4_opendata *data)
2018{
2019 struct inode *dir = data->dir->d_inode;
2020 struct nfs_server *server = NFS_SERVER(dir);
2021 struct nfs_openargs *o_arg = &data->o_arg;
2022 struct nfs_openres *o_res = &data->o_res;
2023 int status;
2024
2025 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2026 if (!data->rpc_done)
2027 return status;
2028 if (status != 0) {
2029 if (status == -NFS4ERR_BADNAME &&
2030 !(o_arg->open_flags & O_CREAT))
2031 return -ENOENT;
24ac23ab 2032 return status;
08ef7bd3 2033 }
24ac23ab 2034
6926afd1
TM		 2035 nfs_fattr_map_and_free_names(server, &data->f_attr);
2036
5bc2afc2 2037 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2038 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2039 if (o_arg->open_flags & O_EXCL)
2040 data->file_created = 1;
2041 else if (o_res->cinfo.before != o_res->cinfo.after)
2042 data->file_created = 1;
2043 }
0df5dd4a
TM		 2044 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2045 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2046 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2047 status = _nfs4_proc_open_confirm(data);
1da177e4 2048 if (status != 0)
24ac23ab 2049 return status;
1da177e4
LT		 2050 }
2051 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2052 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2053 return 0;
1da177e4
LT		 2054}
2055
d83217c1
AA		 2056static int nfs4_recover_expired_lease(struct nfs_server *server)
2057{
2058 return nfs4_client_recover_expired_lease(server->nfs_client);
2059}
2060
1da177e4
LT		 2061/*
2062 * OPEN_EXPIRED:
2063 * reclaim state on the server after a network partition.
2064 * Assumes caller holds the appropriate lock
2065 */
539cd03a 2066static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2067{
e56e0b78 2068 struct nfs4_opendata *opendata;
864472e9 2069 int ret;
1da177e4 2070
4a1c0893 2071 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2072 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2073 if (IS_ERR(opendata))
2074 return PTR_ERR(opendata);
864472e9 2075 ret = nfs4_open_recover(opendata, state);
35d05778 2076 if (ret == -ESTALE)
3d4ff43d 2077 d_drop(ctx->dentry);
c6d00e63 2078 nfs4_opendata_put(opendata);
864472e9 2079 return ret;
1da177e4
LT		 2080}
2081
a9ed2e25 2082static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2083{
539cd03a 2084 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2085 struct nfs4_exception exception = { };
2086 int err;
2087
2088 do {
539cd03a 2089 err = _nfs4_open_expired(ctx, state);
42113a75 2090 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2091 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2092 continue;
a9ed2e25
TM		 2093 switch (err) {
2094 default:
2095 goto out;
2096 case -NFS4ERR_GRACE:
2097 case -NFS4ERR_DELAY:
2098 nfs4_handle_exception(server, err, &exception);
2099 err = 0;
2100 }
202b50dc 2101 } while (exception.retry);
a9ed2e25 2102out:
202b50dc
TM		 2103 return err;
2104}
2105
1da177e4
LT		 2106static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2107{
1da177e4 2108 struct nfs_open_context *ctx;
864472e9 2109 int ret;
1da177e4 2110
864472e9
TM		 2111 ctx = nfs4_state_find_open_context(state);
2112 if (IS_ERR(ctx))
91876b13 2113 return -EAGAIN;
539cd03a 2114 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2115 put_nfs_open_context(ctx);
2116 return ret;
1da177e4
LT		 2117}
2118
4dfd4f7a
TM		 2119static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2120{
2121 nfs_remove_bad_delegation(state->inode);
2122 write_seqlock(&state->seqlock);
2123 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2124 write_sequnlock(&state->seqlock);
2125 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2126}
2127
2128static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2129{
2130 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2131 nfs_finish_clear_delegation_stateid(state);
2132}
2133
2134static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2135{
2136 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2137 nfs40_clear_delegation_stateid(state);
2138 return nfs4_open_expired(sp, state);
2139}
2140
f062eb6c 2141#if defined(CONFIG_NFS_V4_1)
0c116cad 2142static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2143{
f062eb6c 2144 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2145 nfs4_stateid stateid;
ab7cb0df 2146 struct nfs_delegation *delegation;
0c116cad
TM		 2147 struct rpc_cred *cred;
2148 int status;
3e60ffdd 2149
ab7cb0df
TM		 2150 /* Get the delegation credential for use by test/free_stateid */
2151 rcu_read_lock();
2152 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2153 if (delegation == NULL) {
ab7cb0df 2154 rcu_read_unlock();
0c116cad
TM		 2155 return;
2156 }
2157
2158 nfs4_stateid_copy(&stateid, &delegation->stateid);
2159 cred = get_rpccred(delegation->cred);
2160 rcu_read_unlock();
2161 status = nfs41_test_stateid(server, &stateid, cred);
2162 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2163
3e60ffdd
CL		 2164 if (status != NFS_OK) {
2165 /* Free the stateid unless the server explicitly
2166 * informs us the stateid is unrecognized. */
2167 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2168 nfs41_free_stateid(server, &stateid, cred);
2169 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2170 }
ab7cb0df 2171
0c116cad 2172 put_rpccred(cred);
3e60ffdd
CL		 2173}
2174
2175/**
2176 * nfs41_check_open_stateid - possibly free an open stateid
2177 *
2178 * @state: NFSv4 state for an inode
2179 *
2180 * Returns NFS_OK if recovery for this stateid is now finished.
2181 * Otherwise a negative NFS4ERR value is returned.
2182 */
2183static int nfs41_check_open_stateid(struct nfs4_state *state)
2184{
2185 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2186 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2187 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2188 int status;
2189
2190 /* If a state reset has been done, test_stateid is unneeded */
2191 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2192 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2193 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2194 return -NFS4ERR_BAD_STATEID;
2195
ab7cb0df 2196 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2197 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2198 if (status != NFS_OK) {
2199 /* Free the stateid unless the server explicitly
2200 * informs us the stateid is unrecognized. */
2201 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2202 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2203
2204 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2205 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2206 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2207 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2208 }
2209 return status;
2210}
2211
2212static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2213{
eb64cf96 2214 int status;
b01dd1d8 2215
0c116cad 2216 nfs41_check_delegation_stateid(state);
3e60ffdd 2217 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2218 if (status != NFS_OK)
2219 status = nfs4_open_expired(sp, state);
2220 return status;
f062eb6c
BS		 2221}
2222#endif
2223
aa53ed54
JL		 2224/*
2225 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2226 * fields corresponding to attributes that were used to store the verifier.
2227 * Make sure we clobber those fields in the later setattr call
2228 */
2229static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2230{
2231 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2232 !(sattr->ia_valid & ATTR_ATIME_SET))
2233 sattr->ia_valid |= ATTR_ATIME;
2234
2235 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2236 !(sattr->ia_valid & ATTR_MTIME_SET))
2237 sattr->ia_valid |= ATTR_MTIME;
2238}
2239
c21443c2
TM		 2240static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2241 fmode_t fmode,
2242 int flags,
3efb9722 2243 struct nfs_open_context *ctx)
c21443c2
TM		 2244{
2245 struct nfs4_state_owner *sp = opendata->owner;
2246 struct nfs_server *server = sp->so_server;
275bb307 2247 struct dentry *dentry;
c21443c2
TM		 2248 struct nfs4_state *state;
2249 unsigned int seq;
2250 int ret;
2251
2252 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2253
2254 ret = _nfs4_proc_open(opendata);
dca78001 2255 if (ret != 0)
c21443c2
TM		 2256 goto out;
2257
2258 state = nfs4_opendata_to_nfs4_state(opendata);
2259 ret = PTR_ERR(state);
2260 if (IS_ERR(state))
2261 goto out;
2262 if (server->caps & NFS_CAP_POSIX_LOCK)
2263 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2264
275bb307
TM		 2265 dentry = opendata->dentry;
2266 if (dentry->d_inode == NULL) {
2267 /* FIXME: Is this d_drop() ever needed? */
2268 d_drop(dentry);
2269 dentry = d_add_unique(dentry, igrab(state->inode));
2270 if (dentry == NULL) {
2271 dentry = opendata->dentry;
2272 } else if (dentry != ctx->dentry) {
2273 dput(ctx->dentry);
2274 ctx->dentry = dget(dentry);
2275 }
2276 nfs_set_verifier(dentry,
2277 nfs_save_change_attribute(opendata->dir->d_inode));
2278 }
2279
c21443c2
TM		 2280 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2281 if (ret != 0)
2282 goto out;
2283
3efb9722 2284 ctx->state = state;
c45ffdd2
TM		 2285 if (dentry->d_inode == state->inode) {
2286 nfs_inode_attach_open_context(ctx);
2287 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2288 nfs4_schedule_stateid_recovery(server, state);
2289 }
c21443c2
TM		 2290out:
2291 return ret;
2292}
2293
1da177e4 2294/*
24ac23ab 2295 * Returns a referenced nfs4_state
1da177e4 2296 */
82be417a 2297static int _nfs4_do_open(struct inode *dir,
4197a055 2298 struct nfs_open_context *ctx,
82be417a
AA		 2299 int flags,
2300 struct iattr *sattr,
5bc2afc2
TM		 2301 struct nfs4_label *label,
2302 int *opened)
1da177e4
LT		 2303{
2304 struct nfs4_state_owner *sp;
2305 struct nfs4_state *state = NULL;
2306 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2307 struct nfs4_opendata *opendata;
4197a055
TM		 2308 struct dentry *dentry = ctx->dentry;
2309 struct rpc_cred *cred = ctx->cred;
2310 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2311 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2312 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2313 struct nfs4_label *olabel = NULL;
aac00a8d 2314 int status;
1da177e4
LT		 2315
2316 /* Protect against reboot recovery conflicts */
1da177e4 2317 status = -ENOMEM;
d1e284d5
TM		 2318 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2319 if (sp == NULL) {
1da177e4
LT		 2320 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2321 goto out_err;
2322 }
58d9714a
TM		 2323 status = nfs4_recover_expired_lease(server);
2324 if (status != 0)
b4454fe1 2325 goto err_put_state_owner;
82a2c1b7
AV		 2326 if (dentry->d_inode != NULL)
2327 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2328 status = -ENOMEM;
49f9a0fa
TM		 2329 if (dentry->d_inode)
2330 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2331 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2332 label, claim, GFP_KERNEL);
e56e0b78 2333 if (opendata == NULL)
95d35cb4 2334 goto err_put_state_owner;
1da177e4 2335
14c43f76
DQ		 2336 if (label) {
2337 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2338 if (IS_ERR(olabel)) {
2339 status = PTR_ERR(olabel);
2340 goto err_opendata_put;
2341 }
2342 }
2343
e911b815
TM		 2344 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2345 if (!opendata->f_attr.mdsthreshold) {
2346 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2347 if (!opendata->f_attr.mdsthreshold)
2348 goto err_free_label;
2349 }
1549210f 2350 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2351 }
82a2c1b7
AV		 2352 if (dentry->d_inode != NULL)
2353 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2354
3efb9722 2355 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2356 if (status != 0)
14c43f76 2357 goto err_free_label;
3efb9722 2358 state = ctx->state;
6168f62c 2359
549b19cc
TM		 2360 if ((opendata->o_arg.open_flags & O_EXCL) &&
2361 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2362 nfs4_exclusive_attrset(opendata, sattr);
2363
2364 nfs_fattr_init(opendata->o_res.f_attr);
2365 status = nfs4_do_setattr(state->inode, cred,
2366 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2367 state, label, olabel);
2368 if (status == 0) {
0ab64e0e 2369 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2370 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2371 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2372 }
0ab64e0e 2373 }
5bc2afc2
TM		 2374 if (opendata->file_created)
2375 *opened |= FILE_CREATED;
82be417a 2376
e911b815 2377 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2378 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2379 opendata->f_attr.mdsthreshold = NULL;
2380 }
82be417a 2381
14c43f76
DQ		 2382 nfs4_label_free(olabel);
2383
c6d00e63 2384 nfs4_opendata_put(opendata);
1da177e4 2385 nfs4_put_state_owner(sp);
1da177e4 2386 return 0;
14c43f76
DQ		 2387err_free_label:
2388 nfs4_label_free(olabel);
c6d00e63
TM		 2389err_opendata_put:
2390 nfs4_opendata_put(opendata);
e56e0b78
TM		 2391err_put_state_owner:
2392 nfs4_put_state_owner(sp);
1da177e4 2393out_err:
1da177e4
LT		 2394 return status;
2395}
2396
2397
82be417a 2398static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2399 struct nfs_open_context *ctx,
82be417a
AA		 2400 int flags,
2401 struct iattr *sattr,
5bc2afc2
TM		 2402 struct nfs4_label *label,
2403 int *opened)
1da177e4 2404{
49f9a0fa 2405 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2406 struct nfs4_exception exception = { };
2407 struct nfs4_state *res;
2408 int status;
2409
2410 do {
5bc2afc2 2411 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2412 res = ctx->state;
42113a75 2413 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2414 if (status == 0)
2415 break;
2416 /* NOTE: BAD_SEQID means the server and client disagree about the
2417 * book-keeping w.r.t. state-changing operations
2418 * (OPEN/CLOSE/LOCK/LOCKU...)
2419 * It is actually a sign of a bug on the client or on the server.
2420 *
2421 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2422 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2423 * have unhashed the old state_owner for us, and that we can
2424 * therefore safely retry using a new one. We should still warn
2425 * the user though...
2426 */
2427 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2428 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2429 " returned a bad sequence-id error!\n",
2430 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2431 exception.retry = 1;
2432 continue;
2433 }
550f5747
TM		 2434 /*
2435 * BAD_STATEID on OPEN means that the server cancelled our
2436 * state before it received the OPEN_CONFIRM.
2437 * Recover by retrying the request as per the discussion
2438 * on Page 181 of RFC3530.
2439 */
2440 if (status == -NFS4ERR_BAD_STATEID) {
2441 exception.retry = 1;
2442 continue;
2443 }
aac00a8d
TM		 2444 if (status == -EAGAIN) {
2445 /* We must have found a delegation */
2446 exception.retry = 1;
2447 continue;
2448 }
49f9a0fa
TM		 2449 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2450 continue;
2451 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2452 status, &exception));
2453 } while (exception.retry);
2454 return res;
2455}
2456
659bfcd6
TM		 2457static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2458 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2459 struct nfs4_state *state, struct nfs4_label *ilabel,
2460 struct nfs4_label *olabel)
1da177e4 2461{
3e4f6290 2462 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2463 struct nfs_setattrargs arg = {
3e4f6290 2464 .fh = NFS_FH(inode),
1da177e4
LT		 2465 .iap = sattr,
2466 .server = server,
2467 .bitmask = server->attr_bitmask,
1775fd3e 2468 .label = ilabel,
1da177e4
LT		 2469 };
2470 struct nfs_setattrres res = {
2471 .fattr = fattr,
1775fd3e 2472 .label = olabel,
1da177e4
LT		 2473 .server = server,
2474 };
2475 struct rpc_message msg = {
659bfcd6
TM		 2476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2477 .rpc_argp = &arg,
2478 .rpc_resp = &res,
2479 .rpc_cred = cred,
1da177e4 2480 };
26e976a8 2481 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2482 fmode_t fmode;
2483 bool truncate;
65e4308d 2484 int status;
1da177e4 2485
aa9c2669
DQ		 2486 arg.bitmask = nfs4_bitmask(server, ilabel);
2487 if (ilabel)
2488 arg.bitmask = nfs4_bitmask(server, olabel);
2489
0e574af1 2490 nfs_fattr_init(fattr);
1da177e4 2491
ee3ae84e
TM		 2492 /* Servers should only apply open mode checks for file size changes */
2493 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2494 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2495
2496 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2497 /* Use that stateid */
0418dae1 2498 } else if (truncate && state != NULL) {
2a369153
TM		 2499 struct nfs_lockowner lockowner = {
2500 .l_owner = current->files,
2501 .l_pid = current->tgid,
2502 };
0418dae1
TM		 2503 if (!nfs4_valid_open_stateid(state))
2504 return -EBADF;
2505 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2506 &lockowner) == -EIO)
2507 return -EBADF;
08e9eac4 2508 } else
f597c537 2509 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2510
7c513058 2511 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2512 if (status == 0 && state != NULL)
2513 renew_lease(server, timestamp);
65e4308d 2514 return status;
1da177e4
LT		 2515}
2516
659bfcd6
TM		 2517static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2518 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2519 struct nfs4_state *state, struct nfs4_label *ilabel,
2520 struct nfs4_label *olabel)
1da177e4 2521{
3e4f6290 2522 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2523 struct nfs4_exception exception = {
2524 .state = state,
3114ea7a 2525 .inode = inode,
a1d0b5ee 2526 };
1da177e4
LT		 2527 int err;
2528 do {
1775fd3e 2529 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2530 trace_nfs4_setattr(inode, err);
451146be
TM		 2531 switch (err) {
2532 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2533 if (!(sattr->ia_valid & ATTR_SIZE)) {
2534 pr_warn_once("NFSv4: server %s is incorrectly "
2535 "applying open mode checks to "
2536 "a SETATTR that is not "
2537 "changing file size.\n",
2538 server->nfs_client->cl_hostname);
2539 }
451146be
TM		 2540 if (state && !(state->state & FMODE_WRITE)) {
2541 err = -EBADF;
2542 if (sattr->ia_valid & ATTR_OPEN)
2543 err = -EACCES;
2544 goto out;
2545 }
2546 }
2547 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2548 } while (exception.retry);
451146be 2549out:
1da177e4
LT		 2550 return err;
2551}
2552
2553struct nfs4_closedata {
2554 struct inode *inode;
2555 struct nfs4_state *state;
2556 struct nfs_closeargs arg;
2557 struct nfs_closeres res;
516a6af6 2558 struct nfs_fattr fattr;
26e976a8 2559 unsigned long timestamp;
f7e8917a
FI		 2560 bool roc;
2561 u32 roc_barrier;
1da177e4
LT		 2562};
2563
963d8fe5 2564static void nfs4_free_closedata(void *data)
9512135d 2565{
963d8fe5
TM		 2566 struct nfs4_closedata *calldata = data;
2567 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2568 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2569
f7e8917a
FI		 2570 if (calldata->roc)
2571 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2572 nfs4_put_open_state(calldata->state);
2573 nfs_free_seqid(calldata->arg.seqid);
9512135d 2574 nfs4_put_state_owner(sp);
322b2b90 2575 nfs_sb_deactive(sb);
9512135d
TM		 2576 kfree(calldata);
2577}
2578
963d8fe5 2579static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2580{
963d8fe5 2581 struct nfs4_closedata *calldata = data;
1da177e4 2582 struct nfs4_state *state = calldata->state;
1da177e4 2583 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2584 nfs4_stateid *res_stateid = NULL;
1da177e4 2585
a3ca5651 2586 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2587 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2588 return;
42113a75 2589 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2590 /* hmm. we are done with the inode, and in the process of freeing
2591 * the state_owner. we keep this around to process errors
2592 */
1da177e4
LT		 2593 switch (task->tk_status) {
2594 case 0:
412f6c4c
TM		 2595 res_stateid = &calldata->res.stateid;
2596 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2597 pnfs_roc_set_barrier(state->inode,
2598 calldata->roc_barrier);
26e976a8 2599 renew_lease(server, calldata->timestamp);
412f6c4c 2600 break;
69794ad7 2601 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2602 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2603 case -NFS4ERR_OLD_STATEID:
2604 case -NFS4ERR_BAD_STATEID:
1da177e4 2605 case -NFS4ERR_EXPIRED:
566fcec6
TM		 2606 if (!nfs4_stateid_match(&calldata->arg.stateid,
2607 &state->stateid)) {
2608 rpc_restart_call_prepare(task);
2609 goto out_release;
2610 }
dc0b027d 2611 if (calldata->arg.fmode == 0)
9e33bed5 2612 break;
1da177e4 2613 default:
8478eaa1 2614 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2615 rpc_restart_call_prepare(task);
69794ad7
TM		 2616 goto out_release;
2617 }
1da177e4 2618 }
412f6c4c 2619 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2620out_release:
72211dbe 2621 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2622 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2623 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2624}
2625
4ce70ada 2626static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2627{
4ce70ada 2628 struct nfs4_closedata *calldata = data;
9512135d 2629 struct nfs4_state *state = calldata->state;
7fdab069 2630 struct inode *inode = calldata->inode;
aee7af35 2631 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2632 int call_close = 0;
9512135d 2633
a3ca5651 2634 dprintk("%s: begin!\n", __func__);
963d8fe5 2635 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2636 goto out_wait;
003707c7 2637
88069f77 2638 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2639 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2640 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2641 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2642 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
566fcec6 2643 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
003707c7 2644 /* Calculate the change in open mode */
cd9288ff 2645 calldata->arg.fmode = 0;
e7616923 2646 if (state->n_rdwr == 0) {
cd9288ff
TM		 2647 if (state->n_rdonly == 0)
2648 call_close |= is_rdonly;
2649 else if (is_rdonly)
2650 calldata->arg.fmode |= FMODE_READ;
2651 if (state->n_wronly == 0)
2652 call_close |= is_wronly;
2653 else if (is_wronly)
2654 calldata->arg.fmode |= FMODE_WRITE;
2655 } else if (is_rdwr)
2656 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2657
2658 if (calldata->arg.fmode == 0)
2659 call_close |= is_rdwr;
2660
5d422301
TM		 2661 if (!nfs4_valid_open_stateid(state))
2662 call_close = 0;
4cecb76f 2663 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2664
2665 if (!call_close) {
963d8fe5 2666 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2667 goto out_no_action;
9512135d 2668 }
88069f77 2669
f7e8917a 2670 if (calldata->arg.fmode == 0) {
88069f77 2671 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2672 if (calldata->roc &&
b9536ad5
AA		 2673 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2674 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2675 goto out_wait;
b9536ad5 2676 }
f7e8917a 2677 }
88069f77 2678
516a6af6 2679 nfs_fattr_init(calldata->res.fattr);
26e976a8 2680 calldata->timestamp = jiffies;
7fdab069 2681 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2682 &calldata->arg.seq_args,
2683 &calldata->res.seq_res,
2240a9e2
TM		 2684 task) != 0)
2685 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2686 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2687 return;
2688out_no_action:
2689 task->tk_action = NULL;
2690out_wait:
2691 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2692}
2693
963d8fe5 2694static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2695 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2696 .rpc_call_done = nfs4_close_done,
2697 .rpc_release = nfs4_free_closedata,
2698};
2699
fe08c546
PT		 2700static bool nfs4_state_has_opener(struct nfs4_state *state)
2701{
2702 /* first check existing openers */
2703 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2704 state->n_rdonly != 0)
2705 return true;
2706
2707 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2708 state->n_wronly != 0)
2709 return true;
2710
2711 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2712 state->n_rdwr != 0)
2713 return true;
2714
2715 return false;
2716}
2717
2718static bool nfs4_roc(struct inode *inode)
2719{
2720 struct nfs_inode *nfsi = NFS_I(inode);
2721 struct nfs_open_context *ctx;
2722 struct nfs4_state *state;
2723
2724 spin_lock(&inode->i_lock);
2725 list_for_each_entry(ctx, &nfsi->open_files, list) {
2726 state = ctx->state;
2727 if (state == NULL)
2728 continue;
2729 if (nfs4_state_has_opener(state)) {
2730 spin_unlock(&inode->i_lock);
2731 return false;
2732 }
2733 }
2734 spin_unlock(&inode->i_lock);
2735
2736 if (nfs4_check_delegation(inode, FMODE_READ))
2737 return false;
2738
2739 return pnfs_roc(inode);
2740}
2741
1da177e4
LT		 2742/*
2743 * It is possible for data to be read/written from a mem-mapped file
2744 * after the sys_close call (which hits the vfs layer as a flush).
2745 * This means that we can't safely call nfsv4 close on a file until
2746 * the inode is cleared. This in turn means that we are not good
2747 * NFSv4 citizens - we do not indicate to the server to update the file's
2748 * share state even when we are done with one of the three share
2749 * stateid's in the inode.
2750 *
2751 * NOTE: Caller must be holding the sp->so_owner semaphore!
2752 */
1f7977c1 2753int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2754{
4a35bd41 2755 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2757 struct nfs4_closedata *calldata;
b39e625b
TM		 2758 struct nfs4_state_owner *sp = state->owner;
2759 struct rpc_task *task;
5138fde0
TM		 2760 struct rpc_message msg = {
2761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2762 .rpc_cred = state->owner->so_cred,
2763 };
c970aa85
TM		 2764 struct rpc_task_setup task_setup_data = {
2765 .rpc_client = server->client,
5138fde0 2766 .rpc_message = &msg,
c970aa85 2767 .callback_ops = &nfs4_close_ops,
101070ca 2768 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2769 .flags = RPC_TASK_ASYNC,
2770 };
9512135d 2771 int status = -ENOMEM;
1da177e4 2772
fa940720
WAA		 2773 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2774 &task_setup_data.rpc_client, &msg);
2775
8535b2be 2776 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2777 if (calldata == NULL)
9512135d 2778 goto out;
a9c92d6b 2779 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2780 calldata->inode = state->inode;
1da177e4 2781 calldata->state = state;
4a35bd41 2782 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2783 /* Serialization for the sequence id */
63f5f796
TM		 2784 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2785 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2786 if (IS_ERR(calldata->arg.seqid))
9512135d 2787 goto out_free_calldata;
dc0b027d 2788 calldata->arg.fmode = 0;
a65318bf 2789 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2790 calldata->res.fattr = &calldata->fattr;
c1d51931 2791 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2792 calldata->res.server = server;
fe08c546 2793 calldata->roc = nfs4_roc(state->inode);
643168c2 2794 nfs_sb_active(calldata->inode->i_sb);
9512135d 2795
1174dd1f
TM		 2796 msg.rpc_argp = &calldata->arg;
2797 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2798 task_setup_data.callback_data = calldata;
2799 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2800 if (IS_ERR(task))
2801 return PTR_ERR(task);
a49c3c77
TM		 2802 status = 0;
2803 if (wait)
2804 status = rpc_wait_for_completion_task(task);
b39e625b 2805 rpc_put_task(task);
a49c3c77 2806 return status;
9512135d
TM		 2807out_free_calldata:
2808 kfree(calldata);
2809out:
b39e625b
TM		 2810 nfs4_put_open_state(state);
2811 nfs4_put_state_owner(sp);
9512135d 2812 return status;
1da177e4
LT		 2813}
2814
2b484297 2815static struct inode *
5bc2afc2
TM		 2816nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2817 int open_flags, struct iattr *attr, int *opened)
1da177e4 2818{
1da177e4 2819 struct nfs4_state *state;
aa9c2669
DQ		 2820 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2821
2822 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2823
565277f6 2824 /* Protect against concurrent sillydeletes */
5bc2afc2 2825 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2826
2827 nfs4_label_release_security(label);
2828
f46e0bd3
TM		 2829 if (IS_ERR(state))
2830 return ERR_CAST(state);
275bb307 2831 return state->inode;
1da177e4
LT		 2832}
2833
1185a552 2834static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2835{
2836 if (ctx->state == NULL)
2837 return;
2838 if (is_sync)
643168c2 2839 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2840 else
643168c2 2841 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2842}
1da177e4 2843
b944dba3
TM		 2844#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2845#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2846#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2847
1da177e4
LT		 2848static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2849{
43652ad5
BH		 2850 struct nfs4_server_caps_arg args = {
2851 .fhandle = fhandle,
2852 };
1da177e4
LT		 2853 struct nfs4_server_caps_res res = {};
2854 struct rpc_message msg = {
2855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2856 .rpc_argp = &args,
1da177e4
LT		 2857 .rpc_resp = &res,
2858 };
2859 int status;
2860
7c513058 2861 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2862 if (status == 0) {
b944dba3
TM		 2863 /* Sanity check the server answers */
2864 switch (server->nfs_client->cl_minorversion) {
2865 case 0:
2866 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2867 res.attr_bitmask[2] = 0;
2868 break;
2869 case 1:
2870 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2871 break;
2872 case 2:
2873 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2874 }
1da177e4 2875 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2876 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2877 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2878 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2879 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2880 NFS_CAP_CTIME|NFS_CAP_MTIME|
2881 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2882 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2883 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2884 server->caps |= NFS_CAP_ACLS;
2885 if (res.has_links != 0)
2886 server->caps |= NFS_CAP_HARDLINKS;
2887 if (res.has_symlinks != 0)
2888 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2889 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2890 server->caps |= NFS_CAP_FILEID;
2891 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2892 server->caps |= NFS_CAP_MODE;
2893 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2894 server->caps |= NFS_CAP_NLINK;
2895 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2896 server->caps |= NFS_CAP_OWNER;
2897 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2898 server->caps |= NFS_CAP_OWNER_GROUP;
2899 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2900 server->caps |= NFS_CAP_ATIME;
2901 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2902 server->caps |= NFS_CAP_CTIME;
2903 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2904 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2905#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2906 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2907 server->caps |= NFS_CAP_SECURITY_LABEL;
2908#endif
2909 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2910 sizeof(server->attr_bitmask));
b944dba3 2911 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2912
a65318bf
TM		 2913 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2914 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2915 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2916 server->cache_consistency_bitmask[2] = 0;
1da177e4 2917 server->acl_bitmask = res.acl_bitmask;
264e6351 2918 server->fh_expire_type = res.fh_expire_type;
1da177e4 2919 }
cccef3b9 2920
1da177e4
LT		 2921 return status;
2922}
2923
55a97593 2924int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2925{
2926 struct nfs4_exception exception = { };
2927 int err;
2928 do {
2929 err = nfs4_handle_exception(server,
2930 _nfs4_server_capabilities(server, fhandle),
2931 &exception);
2932 } while (exception.retry);
2933 return err;
2934}
2935
2936static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2937 struct nfs_fsinfo *info)
2938{
aa9c2669 2939 u32 bitmask[3];
1da177e4 2940 struct nfs4_lookup_root_arg args = {
aa9c2669 2941 .bitmask = bitmask,
1da177e4
LT		 2942 };
2943 struct nfs4_lookup_res res = {
2944 .server = server,
0e574af1 2945 .fattr = info->fattr,
1da177e4
LT		 2946 .fh = fhandle,
2947 };
2948 struct rpc_message msg = {
2949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2950 .rpc_argp = &args,
2951 .rpc_resp = &res,
2952 };
008f55d0 2953
aa9c2669
DQ		 2954 bitmask[0] = nfs4_fattr_bitmap[0];
2955 bitmask[1] = nfs4_fattr_bitmap[1];
2956 /*
2957 * Process the label in the upcoming getfattr
2958 */
2959 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2960
0e574af1 2961 nfs_fattr_init(info->fattr);
7c513058 2962 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2963}
2964
2965static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2966 struct nfs_fsinfo *info)
2967{
2968 struct nfs4_exception exception = { };
2969 int err;
2970 do {
fb8a5ba8 2971 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2972 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2973 switch (err) {
2974 case 0:
2975 case -NFS4ERR_WRONGSEC:
05e9cfb4 2976 goto out;
fb8a5ba8
BS		 2977 default:
2978 err = nfs4_handle_exception(server, err, &exception);
2979 }
1da177e4 2980 } while (exception.retry);
05e9cfb4 2981out:
1da177e4
LT		 2982 return err;
2983}
2984
8f70e95f
BS		 2985static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2986 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2987{
c2190661
TM		 2988 struct rpc_auth_create_args auth_args = {
2989 .pseudoflavor = flavor,
2990 };
8f70e95f
BS		 2991 struct rpc_auth *auth;
2992 int ret;
2993
c2190661 2994 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2995 if (IS_ERR(auth)) {
75bc8821 2996 ret = -EACCES;
8f70e95f
BS		 2997 goto out;
2998 }
2999 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3000out:
3001 return ret;
3002}
3003
9a744ba3
CL		 3004/*
3005 * Retry pseudoroot lookup with various security flavors. We do this when:
3006 *
3007 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3008 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3009 *
3010 * Returns zero on success, or a negative NFS4ERR value, or a
3011 * negative errno value.
3012 */
801a16dc 3013static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3014 struct nfs_fsinfo *info)
1da177e4 3015{
9a744ba3
CL		 3016 /* Per 3530bis 15.33.5 */
3017 static const rpc_authflavor_t flav_array[] = {
3018 RPC_AUTH_GSS_KRB5P,
3019 RPC_AUTH_GSS_KRB5I,
3020 RPC_AUTH_GSS_KRB5,
c4eafe11 3021 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3022 RPC_AUTH_NULL,
3023 };
3024 int status = -EPERM;
3025 size_t i;
6a1a1e34 3026
4d4b69dd
WAA		 3027 if (server->auth_info.flavor_len > 0) {
3028 /* try each flavor specified by user */
3029 for (i = 0; i < server->auth_info.flavor_len; i++) {
3030 status = nfs4_lookup_root_sec(server, fhandle, info,
3031 server->auth_info.flavors[i]);
3032 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3033 continue;
3034 break;
3035 }
3036 } else {
3037 /* no flavors specified by user, try default list */
3038 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3039 status = nfs4_lookup_root_sec(server, fhandle, info,
3040 flav_array[i]);
3041 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3042 continue;
3043 break;
3044 }
8f70e95f 3045 }
9a744ba3 3046
fb8a5ba8
BS		 3047 /*
3048 * -EACCESS could mean that the user doesn't have correct permissions
3049 * to access the mount. It could also mean that we tried to mount
3050 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3051 * existing mount programs don't handle -EACCES very well so it should
3052 * be mapped to -EPERM instead.
3053 */
3054 if (status == -EACCES)
3055 status = -EPERM;
801a16dc
BS		 3056 return status;
3057}
3058
2ed4b95b
CL		 3059static int nfs4_do_find_root_sec(struct nfs_server *server,
3060 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3061{
3062 int mv = server->nfs_client->cl_minorversion;
3063 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3064}
3065
3066/**
3067 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3068 * @server: initialized nfs_server handle
3069 * @fhandle: we fill in the pseudo-fs root file handle
3070 * @info: we fill in an FSINFO struct
5e6b1990 3071 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3072 *
3073 * Returns zero on success, or a negative errno.
801a16dc 3074 */
3028eb2b 3075int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3076 struct nfs_fsinfo *info,
3077 bool auth_probe)
801a16dc 3078{
2ed4b95b
CL		 3079 int status;
3080
5e6b1990
TM		 3081 switch (auth_probe) {
3082 case false:
3083 status = nfs4_lookup_root(server, fhandle, info);
3084 if (status != -NFS4ERR_WRONGSEC)
3085 break;
5e6b1990 3086 default:
2ed4b95b 3087 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3088 }
2ed4b95b 3089
1da177e4
LT		 3090 if (status == 0)
3091 status = nfs4_server_capabilities(server, fhandle);
3092 if (status == 0)
3093 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3094
c12e87f4 3095 return nfs4_map_errors(status);
1da177e4
LT		 3096}
3097
bae36241
BS		 3098static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3099 struct nfs_fsinfo *info)
3100{
3101 int error;
3102 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3103 struct nfs4_label *label = NULL;
bae36241
BS		 3104
3105 error = nfs4_server_capabilities(server, mntfh);
3106 if (error < 0) {
3107 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3108 return error;
3109 }
3110
14c43f76
DQ		 3111 label = nfs4_label_alloc(server, GFP_KERNEL);
3112 if (IS_ERR(label))
3113 return PTR_ERR(label);
3114
1775fd3e 3115 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3116 if (error < 0) {
3117 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3118 goto err_free_label;
bae36241
BS		 3119 }
3120
3121 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3122 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3123 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3124
14c43f76
DQ		 3125err_free_label:
3126 nfs4_label_free(label);
3127
bae36241
BS		 3128 return error;
3129}
3130
6b97fd3d
MN		 3131/*
3132 * Get locations and (maybe) other attributes of a referral.
3133 * Note that we'll actually follow the referral later when
3134 * we detect fsid mismatch in inode revalidation
3135 */
f05d147f
BS		 3136static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3137 const struct qstr *name, struct nfs_fattr *fattr,
3138 struct nfs_fh *fhandle)
6b97fd3d
MN		 3139{
3140 int status = -ENOMEM;
3141 struct page *page = NULL;
3142 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3143
3144 page = alloc_page(GFP_KERNEL);
3145 if (page == NULL)
3146 goto out;
3147 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3148 if (locations == NULL)
3149 goto out;
3150
f05d147f 3151 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3152 if (status != 0)
3153 goto out;
519ae255
CL		 3154
3155 /*
3156 * If the fsid didn't change, this is a migration event, not a
3157 * referral. Cause us to drop into the exception handler, which
3158 * will kick off migration recovery.
3159 */
6b97fd3d 3160 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3161 dprintk("%s: server did not return a different fsid for"
3162 " a referral at %s\n", __func__, name->name);
519ae255 3163 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3164 goto out;
3165 }
533eb461
AA		 3166 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3167 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3168
533eb461 3169 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3170 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3171 memset(fhandle, 0, sizeof(struct nfs_fh));
3172out:
3173 if (page)
3174 __free_page(page);
5d7ca35a 3175 kfree(locations);
6b97fd3d
MN		 3176 return status;
3177}
3178
1775fd3e
DQ		 3179static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3180 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3181{
3182 struct nfs4_getattr_arg args = {
3183 .fh = fhandle,
3184 .bitmask = server->attr_bitmask,
3185 };
3186 struct nfs4_getattr_res res = {
3187 .fattr = fattr,
1775fd3e 3188 .label = label,
1da177e4
LT		 3189 .server = server,
3190 };
3191 struct rpc_message msg = {
3192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3193 .rpc_argp = &args,
3194 .rpc_resp = &res,
3195 };
aa9c2669
DQ		 3196
3197 args.bitmask = nfs4_bitmask(server, label);
3198
0e574af1 3199 nfs_fattr_init(fattr);
7c513058 3200 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3201}
3202
1775fd3e
DQ		 3203static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3204 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3205{
3206 struct nfs4_exception exception = { };
3207 int err;
3208 do {
b5f875a9
TM		 3209 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3210 trace_nfs4_getattr(server, fhandle, fattr, err);
3211 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3212 &exception);
3213 } while (exception.retry);
3214 return err;
3215}
3216
3217/*
3218 * The file is not closed if it is opened due to the a request to change
3219 * the size of the file. The open call will not be needed once the
3220 * VFS layer lookup-intents are implemented.
3221 *
3222 * Close is called when the inode is destroyed.
3223 * If we haven't opened the file for O_WRONLY, we
3224 * need to in the size_change case to obtain a stateid.
3225 *
3226 * Got race?
3227 * Because OPEN is always done by name in nfsv4, it is
3228 * possible that we opened a different file by the same
3229 * name. We can recognize this race condition, but we
3230 * can't do anything about it besides returning an error.
3231 *
3232 * This will be fixed with VFS changes (lookup-intent).
3233 */
3234static int
3235nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3236 struct iattr *sattr)
3237{
08e9eac4 3238 struct inode *inode = dentry->d_inode;
659bfcd6 3239 struct rpc_cred *cred = NULL;
d530838b 3240 struct nfs4_state *state = NULL;
14c43f76 3241 struct nfs4_label *label = NULL;
1da177e4
LT		 3242 int status;
3243
88ac815c
PT		 3244 if (pnfs_ld_layoutret_on_setattr(inode) &&
3245 sattr->ia_valid & ATTR_SIZE &&
3246 sattr->ia_size < i_size_read(inode))
24028672 3247 pnfs_commit_and_return_layout(inode);
8a1636c4 3248
0e574af1 3249 nfs_fattr_init(fattr);
1da177e4 3250
2669940d
AA		 3251 /* Deal with open(O_TRUNC) */
3252 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3253 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3254
3255 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3256 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3257 return 0;
3258
d530838b 3259 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3260 if (sattr->ia_valid & ATTR_FILE) {
3261 struct nfs_open_context *ctx;
3262
3263 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3264 if (ctx) {
3265 cred = ctx->cred;
3266 state = ctx->state;
3267 }
659bfcd6 3268 }
08e9eac4 3269
14c43f76
DQ		 3270 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3271 if (IS_ERR(label))
3272 return PTR_ERR(label);
3273
3274 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3275 if (status == 0) {
65e4308d 3276 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3277 nfs_setsecurity(inode, fattr, label);
3278 }
14c43f76 3279 nfs4_label_free(label);
1da177e4
LT		 3280 return status;
3281}
3282
0c2e53f1
TM		 3283static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3284 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3285 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3286{
0c2e53f1 3287 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3288 int status;
3289 struct nfs4_lookup_arg args = {
3290 .bitmask = server->attr_bitmask,
0c2e53f1 3291 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3292 .name = name,
3293 };
3294 struct nfs4_lookup_res res = {
3295 .server = server,
3296 .fattr = fattr,
aa9c2669 3297 .label = label,
2b3de441
DH		 3298 .fh = fhandle,
3299 };
3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3302 .rpc_argp = &args,
3303 .rpc_resp = &res,
3304 };
3305
aa9c2669
DQ		 3306 args.bitmask = nfs4_bitmask(server, label);
3307
2b3de441
DH		 3308 nfs_fattr_init(fattr);
3309
1da177e4 3310 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3311 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3312 dprintk("NFS reply lookup: %d\n", status);
3313 return status;
3314}
3315
72de53ec 3316static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3317{
7ebb9315 3318 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3319 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3320 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3321 fattr->nlink = 2;
3322}
3323
72de53ec
BS		 3324static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3325 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3326 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3327{
3328 struct nfs4_exception exception = { };
72de53ec 3329 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3330 int err;
3331 do {
1775fd3e 3332 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3333 trace_nfs4_lookup(dir, name, err);
72de53ec 3334 switch (err) {
08ef7bd3 3335 case -NFS4ERR_BADNAME:
72de53ec
BS		 3336 err = -ENOENT;
3337 goto out;
0c2e53f1 3338 case -NFS4ERR_MOVED:
f05d147f 3339 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3340 goto out;
0c2e53f1 3341 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3342 err = -EPERM;
3343 if (client != *clnt)
3344 goto out;
66b06860 3345 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3346 if (IS_ERR(client))
3347 return PTR_ERR(client);
3348
3349 exception.retry = 1;
3350 break;
3351 default:
3352 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3353 }
1da177e4 3354 } while (exception.retry);
72de53ec
BS		 3355
3356out:
3357 if (err == 0)
3358 *clnt = client;
3359 else if (client != *clnt)
3360 rpc_shutdown_client(client);
3361
1da177e4
LT		 3362 return err;
3363}
3364
80a16b21 3365static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3366 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3367 struct nfs4_label *label)
72de53ec
BS		 3368{
3369 int status;
3370 struct rpc_clnt *client = NFS_CLIENT(dir);
3371
1775fd3e 3372 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3373 if (client != NFS_CLIENT(dir)) {
3374 rpc_shutdown_client(client);
3375 nfs_fixup_secinfo_attributes(fattr);
3376 }
3377 return status;
3378}
3379
f05d147f
BS		 3380struct rpc_clnt *
3381nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3382 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3383{
b72888cb 3384 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3385 int status;
f05d147f 3386
1775fd3e 3387 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3388 if (status < 0)
f05d147f 3389 return ERR_PTR(status);
b72888cb 3390 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3391}
3392
1da177e4
LT		 3393static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3394{
76b32999 3395 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3396 struct nfs4_accessargs args = {
3397 .fh = NFS_FH(inode),
a4980e78 3398 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3399 };
3400 struct nfs4_accessres res = {
3401 .server = server,
1da177e4 3402 };
1da177e4
LT		 3403 struct rpc_message msg = {
3404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3405 .rpc_argp = &args,
3406 .rpc_resp = &res,
3407 .rpc_cred = entry->cred,
3408 };
3409 int mode = entry->mask;
aa9c2669 3410 int status = 0;
1da177e4
LT		 3411
3412 /*
3413 * Determine which access bits we want to ask for...
3414 */
3415 if (mode & MAY_READ)
3416 args.access |= NFS4_ACCESS_READ;
3417 if (S_ISDIR(inode->i_mode)) {
3418 if (mode & MAY_WRITE)
3419 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3420 if (mode & MAY_EXEC)
3421 args.access |= NFS4_ACCESS_LOOKUP;
3422 } else {
3423 if (mode & MAY_WRITE)
3424 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3425 if (mode & MAY_EXEC)
3426 args.access |= NFS4_ACCESS_EXECUTE;
3427 }
c407d41a
TM		 3428
3429 res.fattr = nfs_alloc_fattr();
3430 if (res.fattr == NULL)
3431 return -ENOMEM;
3432
7c513058 3433 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3434 if (!status) {
6168f62c 3435 nfs_access_set_mask(entry, res.access);
c407d41a 3436 nfs_refresh_inode(inode, res.fattr);
1da177e4 3437 }
c407d41a 3438 nfs_free_fattr(res.fattr);
1da177e4
LT		 3439 return status;
3440}
3441
3442static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3443{
3444 struct nfs4_exception exception = { };
3445 int err;
3446 do {
c1578b76
TM		 3447 err = _nfs4_proc_access(inode, entry);
3448 trace_nfs4_access(inode, err);
3449 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3450 &exception);
3451 } while (exception.retry);
3452 return err;
3453}
3454
3455/*
3456 * TODO: For the time being, we don't try to get any attributes
3457 * along with any of the zero-copy operations READ, READDIR,
3458 * READLINK, WRITE.
3459 *
3460 * In the case of the first three, we want to put the GETATTR
3461 * after the read-type operation -- this is because it is hard
3462 * to predict the length of a GETATTR response in v4, and thus
3463 * align the READ data correctly. This means that the GETATTR
3464 * may end up partially falling into the page cache, and we should
3465 * shift it into the 'tail' of the xdr_buf before processing.
3466 * To do this efficiently, we need to know the total length
3467 * of data received, which doesn't seem to be available outside
3468 * of the RPC layer.
3469 *
3470 * In the case of WRITE, we also want to put the GETATTR after
3471 * the operation -- in this case because we want to make sure
140150db 3472 * we get the post-operation mtime and size.
1da177e4
LT		 3473 *
3474 * Both of these changes to the XDR layer would in fact be quite
3475 * minor, but I decided to leave them for a subsequent patch.
3476 */
3477static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3478 unsigned int pgbase, unsigned int pglen)
3479{
3480 struct nfs4_readlink args = {
3481 .fh = NFS_FH(inode),
3482 .pgbase = pgbase,
3483 .pglen = pglen,
3484 .pages = &page,
3485 };
f50c7000 3486 struct nfs4_readlink_res res;
1da177e4
LT		 3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3489 .rpc_argp = &args,
f50c7000 3490 .rpc_resp = &res,
1da177e4
LT		 3491 };
3492
7c513058 3493 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3494}
3495
3496static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3497 unsigned int pgbase, unsigned int pglen)
3498{
3499 struct nfs4_exception exception = { };
3500 int err;
3501 do {
c1578b76
TM		 3502 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3503 trace_nfs4_readlink(inode, err);
3504 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3505 &exception);
3506 } while (exception.retry);
3507 return err;
3508}
3509
1da177e4 3510/*
8867fe58 3511 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3512 */
1da177e4
LT		 3513static int
3514nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3515 int flags)
1da177e4 3516{
aa9c2669 3517 struct nfs4_label l, *ilabel = NULL;
8867fe58 3518 struct nfs_open_context *ctx;
1da177e4 3519 struct nfs4_state *state;
5bc2afc2 3520 int opened = 0;
1da177e4
LT		 3521 int status = 0;
3522
8867fe58
MS		 3523 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3524 if (IS_ERR(ctx))
3525 return PTR_ERR(ctx);
3526
aa9c2669
DQ		 3527 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3528
a8a5da99 3529 sattr->ia_mode &= ~current_umask();
5bc2afc2 3530 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3531 if (IS_ERR(state)) {
3532 status = PTR_ERR(state);
c0204fd2 3533 goto out;
1da177e4 3534 }
1da177e4 3535out:
aa9c2669 3536 nfs4_label_release_security(ilabel);
8867fe58 3537 put_nfs_open_context(ctx);
1da177e4
LT		 3538 return status;
3539}
3540
3541static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3542{
16e42959 3543 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3544 struct nfs_removeargs args = {
1da177e4 3545 .fh = NFS_FH(dir),
26fe5750 3546 .name = *name,
16e42959 3547 };
4fdc17b2 3548 struct nfs_removeres res = {
16e42959 3549 .server = server,
1da177e4 3550 };
1da177e4 3551 struct rpc_message msg = {
4fdc17b2
TM		 3552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3553 .rpc_argp = &args,
3554 .rpc_resp = &res,
1da177e4 3555 };
778d2817 3556 int status;
1da177e4 3557
7c513058 3558 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3559 if (status == 0)
16e42959 3560 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3561 return status;
3562}
3563
3564static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3565{
3566 struct nfs4_exception exception = { };
3567 int err;
3568 do {
078ea3df
TM		 3569 err = _nfs4_proc_remove(dir, name);
3570 trace_nfs4_remove(dir, name, err);
3571 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3572 &exception);
3573 } while (exception.retry);
3574 return err;
3575}
3576
e4eff1a6 3577static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3578{
e4eff1a6
TM		 3579 struct nfs_server *server = NFS_SERVER(dir);
3580 struct nfs_removeargs *args = msg->rpc_argp;
3581 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3582
e4eff1a6 3583 res->server = server;
1da177e4 3584 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3585 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3586
3587 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3588}
3589
34e137cc
BS		 3590static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3591{
d9afbd1b
TM		 3592 nfs4_setup_sequence(NFS_SERVER(data->dir),
3593 &data->args.seq_args,
3594 &data->res.seq_res,
3595 task);
1da177e4
LT		 3596}
3597
e4eff1a6 3598static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3599{
078ea3df
TM		 3600 struct nfs_unlinkdata *data = task->tk_calldata;
3601 struct nfs_removeres *res = &data->res;
e4eff1a6 3602
14516c3a
TM		 3603 if (!nfs4_sequence_done(task, &res->seq_res))
3604 return 0;
8478eaa1
N		 3605 if (nfs4_async_handle_error(task, res->server, NULL,
3606 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3607 return 0;
3608 update_changeattr(dir, &res->cinfo);
e4eff1a6 3609 return 1;
1da177e4
LT		 3610}
3611
d3d4152a
JL		 3612static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3613{
3614 struct nfs_server *server = NFS_SERVER(dir);
3615 struct nfs_renameargs *arg = msg->rpc_argp;
3616 struct nfs_renameres *res = msg->rpc_resp;
3617
3618 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3619 res->server = server;
a9c92d6b 3620 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3621}
3622
c6bfa1a1
BS		 3623static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3624{
d9afbd1b
TM		 3625 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3626 &data->args.seq_args,
3627 &data->res.seq_res,
3628 task);
d3d4152a
JL		 3629}
3630
3631static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3632 struct inode *new_dir)
3633{
fbc6f7c2
TM		 3634 struct nfs_renamedata *data = task->tk_calldata;
3635 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3636
3637 if (!nfs4_sequence_done(task, &res->seq_res))
3638 return 0;
8478eaa1 3639 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3640 return 0;
3641
3642 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3643 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3644 return 1;
3645}
3646
1da177e4
LT		 3647static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3648{
91ba2eee 3649 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3650 struct nfs4_link_arg arg = {
3651 .fh = NFS_FH(inode),
3652 .dir_fh = NFS_FH(dir),
3653 .name = name,
91ba2eee
TM		 3654 .bitmask = server->attr_bitmask,
3655 };
91ba2eee
TM		 3656 struct nfs4_link_res res = {
3657 .server = server,
1775fd3e 3658 .label = NULL,
1da177e4 3659 };
1da177e4
LT		 3660 struct rpc_message msg = {
3661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3662 .rpc_argp = &arg,
91ba2eee 3663 .rpc_resp = &res,
1da177e4 3664 };
136f2627
TM		 3665 int status = -ENOMEM;
3666
3667 res.fattr = nfs_alloc_fattr();
778d2817 3668 if (res.fattr == NULL)
136f2627 3669 goto out;
1da177e4 3670
14c43f76
DQ		 3671 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3672 if (IS_ERR(res.label)) {
3673 status = PTR_ERR(res.label);
3674 goto out;
3675 }
aa9c2669 3676 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3677
7c513058 3678 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3679 if (!status) {
3680 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3681 status = nfs_post_op_update_inode(inode, res.fattr);
3682 if (!status)
3683 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3684 }
14c43f76
DQ		 3685
3686
3687 nfs4_label_free(res.label);
3688
136f2627 3689out:
136f2627 3690 nfs_free_fattr(res.fattr);
1da177e4
LT		 3691 return status;
3692}
3693
3694static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3695{
3696 struct nfs4_exception exception = { };
3697 int err;
3698 do {
3699 err = nfs4_handle_exception(NFS_SERVER(inode),
3700 _nfs4_proc_link(inode, dir, name),
3701 &exception);
3702 } while (exception.retry);
3703 return err;
3704}
3705
57dc9a57
TM		 3706struct nfs4_createdata {
3707 struct rpc_message msg;
3708 struct nfs4_create_arg arg;
3709 struct nfs4_create_res res;
3710 struct nfs_fh fh;
3711 struct nfs_fattr fattr;
1775fd3e 3712 struct nfs4_label *label;
57dc9a57
TM		 3713};
3714
3715static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3716 struct qstr *name, struct iattr *sattr, u32 ftype)
3717{
3718 struct nfs4_createdata *data;
3719
3720 data = kzalloc(sizeof(*data), GFP_KERNEL);
3721 if (data != NULL) {
3722 struct nfs_server *server = NFS_SERVER(dir);
3723
14c43f76
DQ		 3724 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3725 if (IS_ERR(data->label))
3726 goto out_free;
3727
57dc9a57
TM		 3728 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3729 data->msg.rpc_argp = &data->arg;
3730 data->msg.rpc_resp = &data->res;
3731 data->arg.dir_fh = NFS_FH(dir);
3732 data->arg.server = server;
3733 data->arg.name = name;
3734 data->arg.attrs = sattr;
3735 data->arg.ftype = ftype;
aa9c2669 3736 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3737 data->res.server = server;
3738 data->res.fh = &data->fh;
3739 data->res.fattr = &data->fattr;
1775fd3e 3740 data->res.label = data->label;
57dc9a57 3741 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3742 }
3743 return data;
14c43f76
DQ		 3744out_free:
3745 kfree(data);
3746 return NULL;
57dc9a57
TM		 3747}
3748
3749static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3750{
7c513058 3751 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3752 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3753 if (status == 0) {
3754 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3755 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3756 }
3757 return status;
3758}
3759
3760static void nfs4_free_createdata(struct nfs4_createdata *data)
3761{
14c43f76 3762 nfs4_label_free(data->label);
57dc9a57
TM		 3763 kfree(data);
3764}
3765
4f390c15 3766static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3767 struct page *page, unsigned int len, struct iattr *sattr,
3768 struct nfs4_label *label)
1da177e4 3769{
57dc9a57
TM		 3770 struct nfs4_createdata *data;
3771 int status = -ENAMETOOLONG;
1da177e4 3772
94a6d753 3773 if (len > NFS4_MAXPATHLEN)
57dc9a57 3774 goto out;
4f390c15 3775
57dc9a57
TM		 3776 status = -ENOMEM;
3777 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3778 if (data == NULL)
3779 goto out;
3780
3781 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3782 data->arg.u.symlink.pages = &page;
3783 data->arg.u.symlink.len = len;
1775fd3e 3784 data->arg.label = label;
1da177e4 3785
57dc9a57
TM		 3786 status = nfs4_do_create(dir, dentry, data);
3787
3788 nfs4_free_createdata(data);
3789out:
1da177e4
LT		 3790 return status;
3791}
3792
4f390c15 3793static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3794 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3795{
3796 struct nfs4_exception exception = { };
aa9c2669 3797 struct nfs4_label l, *label = NULL;
1da177e4 3798 int err;
aa9c2669
DQ		 3799
3800 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3801
1da177e4 3802 do {
078ea3df
TM		 3803 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3804 trace_nfs4_symlink(dir, &dentry->d_name, err);
3805 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3806 &exception);
3807 } while (exception.retry);
aa9c2669
DQ		 3808
3809 nfs4_label_release_security(label);
1da177e4
LT		 3810 return err;
3811}
3812
3813static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3814 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3815{
57dc9a57
TM		 3816 struct nfs4_createdata *data;
3817 int status = -ENOMEM;
1da177e4 3818
57dc9a57
TM		 3819 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3820 if (data == NULL)
3821 goto out;
3822
1775fd3e 3823 data->arg.label = label;
57dc9a57
TM		 3824 status = nfs4_do_create(dir, dentry, data);
3825
3826 nfs4_free_createdata(data);
3827out:
1da177e4
LT		 3828 return status;
3829}
3830
3831static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3832 struct iattr *sattr)
3833{
3834 struct nfs4_exception exception = { };
aa9c2669 3835 struct nfs4_label l, *label = NULL;
1da177e4 3836 int err;
a8a5da99 3837
aa9c2669
DQ		 3838 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3839
a8a5da99 3840 sattr->ia_mode &= ~current_umask();
1da177e4 3841 do {
078ea3df
TM		 3842 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3843 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3844 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3845 &exception);
3846 } while (exception.retry);
aa9c2669
DQ		 3847 nfs4_label_release_security(label);
3848
1da177e4
LT		 3849 return err;
3850}
3851
3852static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3853 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3854{
3855 struct inode *dir = dentry->d_inode;
3856 struct nfs4_readdir_arg args = {
3857 .fh = NFS_FH(dir),
56e4ebf8 3858 .pages = pages,
1da177e4
LT		 3859 .pgbase = 0,
3860 .count = count,
96d25e53 3861 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3862 .plus = plus,
1da177e4
LT		 3863 };
3864 struct nfs4_readdir_res res;
3865 struct rpc_message msg = {
3866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3867 .rpc_argp = &args,
3868 .rpc_resp = &res,
3869 .rpc_cred = cred,
3870 };
3871 int status;
3872
6de1472f
AV		 3873 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3874 dentry,
eadf4598 3875 (unsigned long long)cookie);
c3f52af3 3876 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3877 res.pgbase = args.pgbase;
7c513058 3878 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3879 if (status >= 0) {
c3f52af3 3880 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3881 status += args.pgbase;
3882 }
c4812998
TM		 3883
3884 nfs_invalidate_atime(dir);
3885
3110ff80 3886 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3887 return status;
3888}
3889
3890static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3891 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3892{
3893 struct nfs4_exception exception = { };
3894 int err;
3895 do {
c1578b76
TM		 3896 err = _nfs4_proc_readdir(dentry, cred, cookie,
3897 pages, count, plus);
3898 trace_nfs4_readdir(dentry->d_inode, err);
3899 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3900 &exception);
3901 } while (exception.retry);
3902 return err;
3903}
3904
3905static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3906 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3907{
57dc9a57
TM		 3908 struct nfs4_createdata *data;
3909 int mode = sattr->ia_mode;
3910 int status = -ENOMEM;
1da177e4 3911
57dc9a57
TM		 3912 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3913 if (data == NULL)
3914 goto out;
3915
1da177e4 3916 if (S_ISFIFO(mode))
57dc9a57 3917 data->arg.ftype = NF4FIFO;
1da177e4 3918 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3919 data->arg.ftype = NF4BLK;
3920 data->arg.u.device.specdata1 = MAJOR(rdev);
3921 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3922 }
3923 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3924 data->arg.ftype = NF4CHR;
3925 data->arg.u.device.specdata1 = MAJOR(rdev);
3926 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3927 } else if (!S_ISSOCK(mode)) {
3928 status = -EINVAL;
3929 goto out_free;
1da177e4 3930 }
1775fd3e 3931
aa9c2669 3932 data->arg.label = label;
57dc9a57 3933 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3934out_free:
57dc9a57
TM		 3935 nfs4_free_createdata(data);
3936out:
1da177e4
LT		 3937 return status;
3938}
3939
3940static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3941 struct iattr *sattr, dev_t rdev)
3942{
3943 struct nfs4_exception exception = { };
aa9c2669 3944 struct nfs4_label l, *label = NULL;
1da177e4 3945 int err;
a8a5da99 3946
aa9c2669
DQ		 3947 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3948
a8a5da99 3949 sattr->ia_mode &= ~current_umask();
1da177e4 3950 do {
078ea3df
TM		 3951 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3952 trace_nfs4_mknod(dir, &dentry->d_name, err);
3953 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3954 &exception);
3955 } while (exception.retry);
aa9c2669
DQ		 3956
3957 nfs4_label_release_security(label);
3958
1da177e4
LT		 3959 return err;
3960}
3961
3962static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3963 struct nfs_fsstat *fsstat)
3964{
3965 struct nfs4_statfs_arg args = {
3966 .fh = fhandle,
3967 .bitmask = server->attr_bitmask,
3968 };
24ad148a
BH		 3969 struct nfs4_statfs_res res = {
3970 .fsstat = fsstat,
3971 };
1da177e4
LT		 3972 struct rpc_message msg = {
3973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3974 .rpc_argp = &args,
24ad148a 3975 .rpc_resp = &res,
1da177e4
LT		 3976 };
3977
0e574af1 3978 nfs_fattr_init(fsstat->fattr);
7c513058 3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3980}
3981
3982static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3983{
3984 struct nfs4_exception exception = { };
3985 int err;
3986 do {
3987 err = nfs4_handle_exception(server,
3988 _nfs4_proc_statfs(server, fhandle, fsstat),
3989 &exception);
3990 } while (exception.retry);
3991 return err;
3992}
3993
3994static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3995 struct nfs_fsinfo *fsinfo)
3996{
3997 struct nfs4_fsinfo_arg args = {
3998 .fh = fhandle,
3999 .bitmask = server->attr_bitmask,
4000 };
3dda5e43
BH		 4001 struct nfs4_fsinfo_res res = {
4002 .fsinfo = fsinfo,
4003 };
1da177e4
LT		 4004 struct rpc_message msg = {
4005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4006 .rpc_argp = &args,
3dda5e43 4007 .rpc_resp = &res,
1da177e4
LT		 4008 };
4009
7c513058 4010 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4011}
4012
4013static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4014{
4015 struct nfs4_exception exception = { };
83ca7f5a 4016 unsigned long now = jiffies;
1da177e4
LT		 4017 int err;
4018
4019 do {
83ca7f5a 4020 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4021 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4022 if (err == 0) {
4023 struct nfs_client *clp = server->nfs_client;
4024
4025 spin_lock(&clp->cl_lock);
4026 clp->cl_lease_time = fsinfo->lease_time * HZ;
4027 clp->cl_last_renewal = now;
4028 spin_unlock(&clp->cl_lock);
4029 break;
4030 }
4031 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4032 } while (exception.retry);
4033 return err;
4034}
4035
4036static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4037{
e38eb650
BS		 4038 int error;
4039
0e574af1 4040 nfs_fattr_init(fsinfo->fattr);
e38eb650 4041 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4042 if (error == 0) {
4043 /* block layout checks this! */
4044 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4045 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4046 }
e38eb650
BS		 4047
4048 return error;
1da177e4
LT		 4049}
4050
4051static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4052 struct nfs_pathconf *pathconf)
4053{
4054 struct nfs4_pathconf_arg args = {
4055 .fh = fhandle,
4056 .bitmask = server->attr_bitmask,
4057 };
d45b2989
BH		 4058 struct nfs4_pathconf_res res = {
4059 .pathconf = pathconf,
4060 };
1da177e4
LT		 4061 struct rpc_message msg = {
4062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4063 .rpc_argp = &args,
d45b2989 4064 .rpc_resp = &res,
1da177e4
LT		 4065 };
4066
4067 /* None of the pathconf attributes are mandatory to implement */
4068 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4069 memset(pathconf, 0, sizeof(*pathconf));
4070 return 0;
4071 }
4072
0e574af1 4073 nfs_fattr_init(pathconf->fattr);
7c513058 4074 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4075}
4076
4077static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4078 struct nfs_pathconf *pathconf)
4079{
4080 struct nfs4_exception exception = { };
4081 int err;
4082
4083 do {
4084 err = nfs4_handle_exception(server,
4085 _nfs4_proc_pathconf(server, fhandle, pathconf),
4086 &exception);
4087 } while (exception.retry);
4088 return err;
4089}
4090
5521abfd 4091int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4092 const struct nfs_open_context *ctx,
4093 const struct nfs_lock_context *l_ctx,
4094 fmode_t fmode)
4095{
4096 const struct nfs_lockowner *lockowner = NULL;
4097
4098 if (l_ctx != NULL)
4099 lockowner = &l_ctx->lockowner;
5521abfd 4100 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4101}
4102EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4103
5521abfd
TM		 4104static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4105 const struct nfs_open_context *ctx,
4106 const struct nfs_lock_context *l_ctx,
4107 fmode_t fmode)
4108{
4109 nfs4_stateid current_stateid;
4110
e1253be0
TM		 4111 /* If the current stateid represents a lost lock, then exit */
4112 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4113 return true;
5521abfd
TM		 4114 return nfs4_stateid_match(stateid, &current_stateid);
4115}
4116
4117static bool nfs4_error_stateid_expired(int err)
4118{
4119 switch (err) {
4120 case -NFS4ERR_DELEG_REVOKED:
4121 case -NFS4ERR_ADMIN_REVOKED:
4122 case -NFS4ERR_BAD_STATEID:
4123 case -NFS4ERR_STALE_STATEID:
4124 case -NFS4ERR_OLD_STATEID:
4125 case -NFS4ERR_OPENMODE:
4126 case -NFS4ERR_EXPIRED:
4127 return true;
4128 }
4129 return false;
4130}
4131
d45f60c6 4132void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4133{
d45f60c6 4134 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4135}
4136
d45f60c6 4137static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4138{
d45f60c6 4139 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4140
d45f60c6
WAA		 4141 trace_nfs4_read(hdr, task->tk_status);
4142 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4143 hdr->args.context->state,
4144 NULL) == -EAGAIN) {
d00c5d43 4145 rpc_restart_call_prepare(task);
ec06c096 4146 return -EAGAIN;
1da177e4 4147 }
8850df99 4148
d45f60c6 4149 __nfs4_read_done_cb(hdr);
1da177e4 4150 if (task->tk_status > 0)
d45f60c6 4151 renew_lease(server, hdr->timestamp);
ec06c096 4152 return 0;
1da177e4
LT		 4153}
4154
5521abfd 4155static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4156 struct nfs_pgio_args *args)
5521abfd
TM		 4157{
4158
4159 if (!nfs4_error_stateid_expired(task->tk_status) ||
4160 nfs4_stateid_is_current(&args->stateid,
4161 args->context,
4162 args->lock_context,
4163 FMODE_READ))
4164 return false;
4165 rpc_restart_call_prepare(task);
4166 return true;
4167}
4168
d45f60c6 4169static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4170{
4171
4172 dprintk("--> %s\n", __func__);
4173
d45f60c6 4174 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4175 return -EAGAIN;
d45f60c6 4176 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4177 return -EAGAIN;
d45f60c6
WAA		 4178 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4179 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4180}
4181
d45f60c6
WAA		 4182static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4183 struct rpc_message *msg)
1da177e4 4184{
d45f60c6
WAA		 4185 hdr->timestamp = jiffies;
4186 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4187 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4188 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4189}
4190
d45f60c6
WAA		 4191static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4192 struct nfs_pgio_header *hdr)
ea7c3303 4193{
d45f60c6
WAA		 4194 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4195 &hdr->args.seq_args,
4196 &hdr->res.seq_res,
9b206149 4197 task))
ef1820f9 4198 return 0;
d45f60c6
WAA		 4199 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4200 hdr->args.lock_context,
4201 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4202 return -EIO;
d45f60c6 4203 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4204 return -EIO;
4205 return 0;
1da177e4
LT		 4206}
4207
d45f60c6
WAA		 4208static int nfs4_write_done_cb(struct rpc_task *task,
4209 struct nfs_pgio_header *hdr)
1da177e4 4210{
d45f60c6 4211 struct inode *inode = hdr->inode;
8478eaa1 4212
d45f60c6
WAA		 4213 trace_nfs4_write(hdr, task->tk_status);
4214 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4215 hdr->args.context->state,
4216 NULL) == -EAGAIN) {
d00c5d43 4217 rpc_restart_call_prepare(task);
788e7a89 4218 return -EAGAIN;
1da177e4 4219 }
4f9838c7 4220 if (task->tk_status >= 0) {
d45f60c6
WAA		 4221 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4222 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4223 }
788e7a89 4224 return 0;
1da177e4
LT		 4225}
4226
5521abfd 4227static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4228 struct nfs_pgio_args *args)
5521abfd
TM		 4229{
4230
4231 if (!nfs4_error_stateid_expired(task->tk_status) ||
4232 nfs4_stateid_is_current(&args->stateid,
4233 args->context,
4234 args->lock_context,
4235 FMODE_WRITE))
4236 return false;
4237 rpc_restart_call_prepare(task);
4238 return true;
4239}
4240
d45f60c6 4241static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4242{
d45f60c6 4243 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4244 return -EAGAIN;
d45f60c6 4245 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4246 return -EAGAIN;
d45f60c6
WAA		 4247 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4248 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4249}
4250
5a37f851 4251static
d45f60c6 4252bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4253{
5a37f851 4254 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4255 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4256 return false;
4257 /* Otherwise, request attributes if and only if we don't hold
4258 * a delegation
4259 */
011e2a7f 4260 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4261}
a69aef14 4262
d45f60c6
WAA		 4263static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4264 struct rpc_message *msg)
1da177e4 4265{
d45f60c6 4266 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4267
d45f60c6
WAA		 4268 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4269 hdr->args.bitmask = NULL;
4270 hdr->res.fattr = NULL;
7ffd1064 4271 } else
d45f60c6 4272 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4273
d45f60c6
WAA		 4274 if (!hdr->pgio_done_cb)
4275 hdr->pgio_done_cb = nfs4_write_done_cb;
4276 hdr->res.server = server;
4277 hdr->timestamp = jiffies;
1da177e4 4278
bdc7f021 4279 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4280 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4281}
4282
0b7c0153 4283static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4284{
d9afbd1b
TM		 4285 nfs4_setup_sequence(NFS_SERVER(data->inode),
4286 &data->args.seq_args,
4287 &data->res.seq_res,
4288 task);
1da177e4
LT		 4289}
4290
0b7c0153 4291static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4292{
1da177e4 4293 struct inode *inode = data->inode;
14516c3a 4294
cc668ab3 4295 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4296 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4297 NULL, NULL) == -EAGAIN) {
d00c5d43 4298 rpc_restart_call_prepare(task);
788e7a89 4299 return -EAGAIN;
1da177e4 4300 }
788e7a89 4301 return 0;
1da177e4
LT		 4302}
4303
0b7c0153 4304static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4305{
4306 if (!nfs4_sequence_done(task, &data->res.seq_res))
4307 return -EAGAIN;
0b7c0153 4308 return data->commit_done_cb(task, data);
5f452431
FI		 4309}
4310
0b7c0153 4311static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4312{
788e7a89 4313 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4314
0b7c0153
FI		 4315 if (data->commit_done_cb == NULL)
4316 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4317 data->res.server = server;
bdc7f021 4318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4319 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4320}
4321
9bc4e3ca
CL		 4322struct nfs4_renewdata {
4323 struct nfs_client *client;
4324 unsigned long timestamp;
4325};
4326
1da177e4
LT		 4327/*
4328 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4329 * standalone procedure for queueing an asynchronous RENEW.
4330 */
9bc4e3ca 4331static void nfs4_renew_release(void *calldata)
dc96aef9 4332{
9bc4e3ca
CL		 4333 struct nfs4_renewdata *data = calldata;
4334 struct nfs_client *clp = data->client;
dc96aef9 4335
0851de06
AB		 4336 if (atomic_read(&clp->cl_count) > 1)
4337 nfs4_schedule_state_renewal(clp);
4338 nfs_put_client(clp);
9bc4e3ca 4339 kfree(data);
dc96aef9
AB		 4340}
4341
9bc4e3ca 4342static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4343{
9bc4e3ca
CL		 4344 struct nfs4_renewdata *data = calldata;
4345 struct nfs_client *clp = data->client;
4346 unsigned long timestamp = data->timestamp;
1da177e4 4347
c6d01c6f 4348 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4349 switch (task->tk_status) {
4350 case 0:
4351 break;
4352 case -NFS4ERR_LEASE_MOVED:
4353 nfs4_schedule_lease_moved_recovery(clp);
4354 break;
4355 default:
95baa25c 4356 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4357 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4358 return;
4359 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4360 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4361 return;
4362 }
4363 nfs4_schedule_path_down_recovery(clp);
1da177e4 4364 }
452e9352 4365 do_renew_lease(clp, timestamp);
1da177e4
LT		 4366}
4367
963d8fe5
TM		 4368static const struct rpc_call_ops nfs4_renew_ops = {
4369 .rpc_call_done = nfs4_renew_done,
dc96aef9 4370 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4371};
4372
2f60ea6b 4373static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4374{
4375 struct rpc_message msg = {
4376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4377 .rpc_argp = clp,
b4454fe1 4378 .rpc_cred = cred,
1da177e4 4379 };
9bc4e3ca 4380 struct nfs4_renewdata *data;
1da177e4 4381
2f60ea6b
TM		 4382 if (renew_flags == 0)
4383 return 0;
0851de06
AB		 4384 if (!atomic_inc_not_zero(&clp->cl_count))
4385 return -EIO;
b569ad34 4386 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4387 if (data == NULL)
4388 return -ENOMEM;
4389 data->client = clp;
4390 data->timestamp = jiffies;
bc7a05ca 4391 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4392 &nfs4_renew_ops, data);
1da177e4
LT		 4393}
4394
8534d4ec 4395static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4396{
4397 struct rpc_message msg = {
4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4399 .rpc_argp = clp,
b4454fe1 4400 .rpc_cred = cred,
1da177e4
LT		 4401 };
4402 unsigned long now = jiffies;
4403 int status;
4404
bc7a05ca 4405 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4406 if (status < 0)
4407 return status;
452e9352 4408 do_renew_lease(clp, now);
1da177e4
LT		 4409 return 0;
4410}
4411
aa1870af
BF		 4412static inline int nfs4_server_supports_acls(struct nfs_server *server)
4413{
7dd7d959 4414 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4415}
4416
21f498c2
TM		 4417/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4418 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4419 * the stack.
4420 */
21f498c2 4421#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4422
e9e3d724
NH		 4423static int buf_to_pages_noslab(const void *buf, size_t buflen,
4424 struct page **pages, unsigned int *pgbase)
4425{
4426 struct page *newpage, **spages;
4427 int rc = 0;
4428 size_t len;
4429 spages = pages;
4430
4431 do {
21f498c2 4432 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4433 newpage = alloc_page(GFP_KERNEL);
4434
4435 if (newpage == NULL)
4436 goto unwind;
4437 memcpy(page_address(newpage), buf, len);
4438 buf += len;
4439 buflen -= len;
4440 *pages++ = newpage;
4441 rc++;
4442 } while (buflen != 0);
4443
4444 return rc;
4445
4446unwind:
4447 for(; rc > 0; rc--)
4448 __free_page(spages[rc-1]);
4449 return -ENOMEM;
4450}
4451
e50a1c2e
BF		 4452struct nfs4_cached_acl {
4453 int cached;
4454 size_t len;
3e9d4154 4455 char data[0];
e50a1c2e
BF		 4456};
4457
4458static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4459{
4460 struct nfs_inode *nfsi = NFS_I(inode);
4461
4462 spin_lock(&inode->i_lock);
4463 kfree(nfsi->nfs4_acl);
4464 nfsi->nfs4_acl = acl;
4465 spin_unlock(&inode->i_lock);
4466}
4467
4468static void nfs4_zap_acl_attr(struct inode *inode)
4469{
4470 nfs4_set_cached_acl(inode, NULL);
4471}
4472
4473static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4474{
4475 struct nfs_inode *nfsi = NFS_I(inode);
4476 struct nfs4_cached_acl *acl;
4477 int ret = -ENOENT;
4478
4479 spin_lock(&inode->i_lock);
4480 acl = nfsi->nfs4_acl;
4481 if (acl == NULL)
4482 goto out;
4483 if (buf == NULL) /* user is just asking for length */
4484 goto out_len;
4485 if (acl->cached == 0)
4486 goto out;
4487 ret = -ERANGE; /* see getxattr(2) man page */
4488 if (acl->len > buflen)
4489 goto out;
4490 memcpy(buf, acl->data, acl->len);
4491out_len:
4492 ret = acl->len;
4493out:
4494 spin_unlock(&inode->i_lock);
4495 return ret;
4496}
4497
5794d21e 4498static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4499{
4500 struct nfs4_cached_acl *acl;
b291f1b1 4501 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4502
1f1ea6c2 4503 if (buflen <= PAGE_SIZE) {
b291f1b1 4504 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4505 if (acl == NULL)
4506 goto out;
4507 acl->cached = 1;
5794d21e 4508 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4509 } else {
4510 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4511 if (acl == NULL)
4512 goto out;
4513 acl->cached = 0;
4514 }
4515 acl->len = acl_len;
4516out:
4517 nfs4_set_cached_acl(inode, acl);
4518}
4519
bf118a34
AA		 4520/*
4521 * The getxattr API returns the required buffer length when called with a
4522 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4523 * the required buf. On a NULL buf, we send a page of data to the server
4524 * guessing that the ACL request can be serviced by a page. If so, we cache
4525 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4526 * the cache. If not so, we throw away the page, and cache the required
4527 * length. The next getxattr call will then produce another round trip to
4528 * the server, this time with the input buf of the required size.
4529 */
16b4289c 4530static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4531{
bf118a34 4532 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4533 struct nfs_getaclargs args = {
4534 .fh = NFS_FH(inode),
4535 .acl_pages = pages,
4536 .acl_len = buflen,
4537 };
663c79b3
BH		 4538 struct nfs_getaclres res = {
4539 .acl_len = buflen,
4540 };
aa1870af
BF		 4541 struct rpc_message msg = {
4542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4543 .rpc_argp = &args,
663c79b3 4544 .rpc_resp = &res,
aa1870af 4545 };
21f498c2
TM		 4546 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4547 int ret = -ENOMEM, i;
aa1870af 4548
bf118a34
AA		 4549 /* As long as we're doing a round trip to the server anyway,
4550 * let's be prepared for a page of acl data. */
4551 if (npages == 0)
4552 npages = 1;
21f498c2
TM		 4553 if (npages > ARRAY_SIZE(pages))
4554 return -ERANGE;
5a006899 4555
bf118a34
AA		 4556 for (i = 0; i < npages; i++) {
4557 pages[i] = alloc_page(GFP_KERNEL);
4558 if (!pages[i])
4559 goto out_free;
e50a1c2e 4560 }
5a006899
SP		 4561
4562 /* for decoding across pages */
4563 res.acl_scratch = alloc_page(GFP_KERNEL);
4564 if (!res.acl_scratch)
4565 goto out_free;
4566
bf118a34
AA		 4567 args.acl_len = npages * PAGE_SIZE;
4568 args.acl_pgbase = 0;
5a006899 4569
de040bec 4570 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4571 __func__, buf, buflen, npages, args.acl_len);
4572 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4573 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4574 if (ret)
4575 goto out_free;
bf118a34 4576
1f1ea6c2
TM		 4577 /* Handle the case where the passed-in buffer is too short */
4578 if (res.acl_flags & NFS4_ACL_TRUNC) {
4579 /* Did the user only issue a request for the acl length? */
4580 if (buf == NULL)
4581 goto out_ok;
e50a1c2e 4582 ret = -ERANGE;
1f1ea6c2 4583 goto out_free;
e50a1c2e 4584 }
1f1ea6c2 4585 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4586 if (buf) {
4587 if (res.acl_len > buflen) {
4588 ret = -ERANGE;
4589 goto out_free;
4590 }
1f1ea6c2 4591 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4592 }
1f1ea6c2
TM		 4593out_ok:
4594 ret = res.acl_len;
e50a1c2e 4595out_free:
bf118a34
AA		 4596 for (i = 0; i < npages; i++)
4597 if (pages[i])
4598 __free_page(pages[i]);
331818f1
TM		 4599 if (res.acl_scratch)
4600 __free_page(res.acl_scratch);
aa1870af
BF		 4601 return ret;
4602}
4603
16b4289c
TM		 4604static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4605{
4606 struct nfs4_exception exception = { };
4607 ssize_t ret;
4608 do {
4609 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4610 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4611 if (ret >= 0)
4612 break;
4613 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4614 } while (exception.retry);
4615 return ret;
4616}
4617
e50a1c2e
BF		 4618static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4619{
4620 struct nfs_server *server = NFS_SERVER(inode);
4621 int ret;
4622
4623 if (!nfs4_server_supports_acls(server))
4624 return -EOPNOTSUPP;
4625 ret = nfs_revalidate_inode(server, inode);
4626 if (ret < 0)
4627 return ret;
08a22b39
AK		 4628 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4629 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4630 ret = nfs4_read_cached_acl(inode, buf, buflen);
4631 if (ret != -ENOENT)
bf118a34
AA		 4632 /* -ENOENT is returned if there is no ACL or if there is an ACL
4633 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4634 return ret;
4635 return nfs4_get_acl_uncached(inode, buf, buflen);
4636}
4637
16b4289c 4638static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4639{
4640 struct nfs_server *server = NFS_SERVER(inode);
4641 struct page *pages[NFS4ACL_MAXPAGES];
4642 struct nfs_setaclargs arg = {
4643 .fh = NFS_FH(inode),
4644 .acl_pages = pages,
4645 .acl_len = buflen,
4646 };
73c403a9 4647 struct nfs_setaclres res;
4b580ee3
BF		 4648 struct rpc_message msg = {
4649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4650 .rpc_argp = &arg,
73c403a9 4651 .rpc_resp = &res,
4b580ee3 4652 };
21f498c2 4653 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4654 int ret, i;
4b580ee3
BF		 4655
4656 if (!nfs4_server_supports_acls(server))
4657 return -EOPNOTSUPP;
21f498c2
TM		 4658 if (npages > ARRAY_SIZE(pages))
4659 return -ERANGE;
e9e3d724
NH		 4660 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4661 if (i < 0)
4662 return i;
57ec14c5 4663 nfs4_inode_return_delegation(inode);
7c513058 4664 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4665
4666 /*
4667 * Free each page after tx, so the only ref left is
4668 * held by the network stack
4669 */
4670 for (; i > 0; i--)
4671 put_page(pages[i-1]);
4672
08a22b39
AK		 4673 /*
4674 * Acl update can result in inode attribute update.
4675 * so mark the attribute cache invalid.
4676 */
4677 spin_lock(&inode->i_lock);
4678 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4679 spin_unlock(&inode->i_lock);
f41f7418
TM		 4680 nfs_access_zap_cache(inode);
4681 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4682 return ret;
4683}
4684
16b4289c
TM		 4685static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4686{
4687 struct nfs4_exception exception = { };
4688 int err;
4689 do {
c1578b76
TM		 4690 err = __nfs4_proc_set_acl(inode, buf, buflen);
4691 trace_nfs4_set_acl(inode, err);
4692 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4693 &exception);
4694 } while (exception.retry);
4695 return err;
4696}
4697
aa9c2669
DQ		 4698#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4699static int _nfs4_get_security_label(struct inode *inode, void *buf,
4700 size_t buflen)
4701{
4702 struct nfs_server *server = NFS_SERVER(inode);
4703 struct nfs_fattr fattr;
4704 struct nfs4_label label = {0, 0, buflen, buf};
4705
4706 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4707 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4708 .fh = NFS_FH(inode),
4709 .bitmask = bitmask,
4710 };
4711 struct nfs4_getattr_res res = {
4712 .fattr = &fattr,
4713 .label = &label,
4714 .server = server,
4715 };
4716 struct rpc_message msg = {
4717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4718 .rpc_argp = &arg,
aa9c2669
DQ		 4719 .rpc_resp = &res,
4720 };
4721 int ret;
4722
4723 nfs_fattr_init(&fattr);
4724
fcb63a9b 4725 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4726 if (ret)
4727 return ret;
4728 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4729 return -ENOENT;
4730 if (buflen < label.len)
4731 return -ERANGE;
4732 return 0;
4733}
4734
4735static int nfs4_get_security_label(struct inode *inode, void *buf,
4736 size_t buflen)
4737{
4738 struct nfs4_exception exception = { };
4739 int err;
4740
4741 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4742 return -EOPNOTSUPP;
4743
4744 do {
c1578b76
TM		 4745 err = _nfs4_get_security_label(inode, buf, buflen);
4746 trace_nfs4_get_security_label(inode, err);
4747 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4748 &exception);
4749 } while (exception.retry);
4750 return err;
4751}
4752
4753static int _nfs4_do_set_security_label(struct inode *inode,
4754 struct nfs4_label *ilabel,
4755 struct nfs_fattr *fattr,
4756 struct nfs4_label *olabel)
4757{
4758
4759 struct iattr sattr = {0};
4760 struct nfs_server *server = NFS_SERVER(inode);
4761 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4762 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4763 .fh = NFS_FH(inode),
4764 .iap = &sattr,
4765 .server = server,
4766 .bitmask = bitmask,
4767 .label = ilabel,
4768 };
4769 struct nfs_setattrres res = {
4770 .fattr = fattr,
4771 .label = olabel,
4772 .server = server,
4773 };
4774 struct rpc_message msg = {
4775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4776 .rpc_argp = &arg,
aa9c2669
DQ		 4777 .rpc_resp = &res,
4778 };
4779 int status;
4780
12207f69 4781 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4782
12207f69 4783 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4784 if (status)
4785 dprintk("%s failed: %d\n", __func__, status);
4786
4787 return status;
4788}
4789
4790static int nfs4_do_set_security_label(struct inode *inode,
4791 struct nfs4_label *ilabel,
4792 struct nfs_fattr *fattr,
4793 struct nfs4_label *olabel)
4794{
4795 struct nfs4_exception exception = { };
4796 int err;
4797
4798 do {
c1578b76
TM		 4799 err = _nfs4_do_set_security_label(inode, ilabel,
4800 fattr, olabel);
4801 trace_nfs4_set_security_label(inode, err);
4802 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4803 &exception);
4804 } while (exception.retry);
4805 return err;
4806}
4807
4808static int
4809nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4810{
4811 struct nfs4_label ilabel, *olabel = NULL;
4812 struct nfs_fattr fattr;
4813 struct rpc_cred *cred;
4814 struct inode *inode = dentry->d_inode;
4815 int status;
4816
4817 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4818 return -EOPNOTSUPP;
4819
4820 nfs_fattr_init(&fattr);
4821
4822 ilabel.pi = 0;
4823 ilabel.lfs = 0;
4824 ilabel.label = (char *)buf;
4825 ilabel.len = buflen;
4826
4827 cred = rpc_lookup_cred();
4828 if (IS_ERR(cred))
4829 return PTR_ERR(cred);
4830
4831 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4832 if (IS_ERR(olabel)) {
4833 status = -PTR_ERR(olabel);
4834 goto out;
4835 }
4836
4837 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4838 if (status == 0)
4839 nfs_setsecurity(inode, &fattr, olabel);
4840
4841 nfs4_label_free(olabel);
4842out:
4843 put_rpccred(cred);
4844 return status;
4845}
4846#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4847
4848
1da177e4 4849static int
8478eaa1
N		 4850nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4851 struct nfs4_state *state, long *timeout)
1da177e4 4852{
aa5190d0
TM		 4853 struct nfs_client *clp = server->nfs_client;
4854
4855 if (task->tk_status >= 0)
1da177e4
LT		 4856 return 0;
4857 switch(task->tk_status) {
a1d0b5ee 4858 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4859 case -NFS4ERR_ADMIN_REVOKED:
4860 case -NFS4ERR_BAD_STATEID:
4861 case -NFS4ERR_OPENMODE:
4862 if (state == NULL)
4863 break;
5d422301 4864 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4865 goto recovery_failed;
0400a6b0 4866 goto wait_on_recovery;
0ced63d1 4867 case -NFS4ERR_EXPIRED:
5d422301
TM		 4868 if (state != NULL) {
4869 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4870 goto recovery_failed;
5d422301 4871 }
1da177e4 4872 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4873 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4874 nfs4_schedule_lease_recovery(clp);
4875 goto wait_on_recovery;
519ae255
CL		 4876 case -NFS4ERR_MOVED:
4877 if (nfs4_schedule_migration_recovery(server) < 0)
4878 goto recovery_failed;
4879 goto wait_on_recovery;
8ef2f8d4
CL		 4880 case -NFS4ERR_LEASE_MOVED:
4881 nfs4_schedule_lease_moved_recovery(clp);
4882 goto wait_on_recovery;
4745e315
AA		 4883#if defined(CONFIG_NFS_V4_1)
4884 case -NFS4ERR_BADSESSION:
4885 case -NFS4ERR_BADSLOT:
4886 case -NFS4ERR_BAD_HIGH_SLOT:
4887 case -NFS4ERR_DEADSESSION:
4888 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4889 case -NFS4ERR_SEQ_FALSE_RETRY:
4890 case -NFS4ERR_SEQ_MISORDERED:
4891 dprintk("%s ERROR %d, Reset session\n", __func__,
4892 task->tk_status);
9f594791 4893 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4894 goto wait_on_recovery;
4745e315 4895#endif /* CONFIG_NFS_V4_1 */
1da177e4 4896 case -NFS4ERR_DELAY:
aa5190d0 4897 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4898 rpc_delay(task, nfs4_update_delay(timeout));
4899 goto restart_call;
006ea73e 4900 case -NFS4ERR_GRACE:
1da177e4 4901 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4902 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4903 case -NFS4ERR_OLD_STATEID:
f1478c13 4904 goto restart_call;
1da177e4
LT		 4905 }
4906 task->tk_status = nfs4_map_errors(task->tk_status);
4907 return 0;
9f51a78e 4908recovery_failed:
5d422301
TM		 4909 task->tk_status = -EIO;
4910 return 0;
0400a6b0 4911wait_on_recovery:
a2c0b9e2 4912 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4913 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4914 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4915 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4916 goto recovery_failed;
f1478c13 4917restart_call:
a2c0b9e2
TM		 4918 task->tk_status = 0;
4919 return -EAGAIN;
1da177e4
LT		 4920}
4921
f092075d
CL		 4922static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4923 nfs4_verifier *bootverf)
cd93710e
CL		 4924{
4925 __be32 verf[2];
4926
2c820d9a
CL		 4927 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4928 /* An impossible timestamp guarantees this value
4929 * will never match a generated boot time. */
4930 verf[0] = 0;
17f26b12 4931 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4932 } else {
f092075d 4933 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4934 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4935 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4936 }
cd93710e
CL		 4937 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4938}
4939
e984a55a 4940static unsigned int
ceb3a16c 4941nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4942 char *buf, size_t len)
4943{
4944 unsigned int result;
4945
ceb3a16c
TM		 4946 if (clp->cl_owner_id != NULL)
4947 return strlcpy(buf, clp->cl_owner_id, len);
4948
e984a55a
CL		 4949 rcu_read_lock();
4950 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4951 clp->cl_ipaddr,
4952 rpc_peeraddr2str(clp->cl_rpcclient,
4953 RPC_DISPLAY_ADDR),
4954 rpc_peeraddr2str(clp->cl_rpcclient,
4955 RPC_DISPLAY_PROTO));
4956 rcu_read_unlock();
ceb3a16c 4957 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4958 return result;
4959}
4960
4961static unsigned int
ceb3a16c 4962nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4963 char *buf, size_t len)
4964{
55b59293 4965 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4966 unsigned int result;
4967
4968 if (clp->cl_owner_id != NULL)
4969 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4970
4971 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4972 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4973 clp->rpc_ops->version,
4974 clp->cl_minorversion,
4975 nfs4_client_id_uniquifier,
4976 nodename);
ceb3a16c
TM		 4977 else
4978 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4979 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4980 nodename);
ceb3a16c
TM		 4981 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4982 return result;
e984a55a
CL		 4983}
4984
706cb8db
CL		 4985/*
4986 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4987 * services. Advertise one based on the address family of the
4988 * clientaddr.
4989 */
4990static unsigned int
4991nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4992{
4993 if (strchr(clp->cl_ipaddr, ':') != NULL)
4994 return scnprintf(buf, len, "tcp6");
4995 else
4996 return scnprintf(buf, len, "tcp");
4997}
4998
f11b2a1c
JL		 4999static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5000{
5001 struct nfs4_setclientid *sc = calldata;
5002
5003 if (task->tk_status == 0)
5004 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5005}
5006
5007static const struct rpc_call_ops nfs4_setclientid_ops = {
5008 .rpc_call_done = nfs4_setclientid_done,
5009};
5010
6bbb4ae8
CL		 5011/**
5012 * nfs4_proc_setclientid - Negotiate client ID
5013 * @clp: state data structure
5014 * @program: RPC program for NFSv4 callback service
5015 * @port: IP port number for NFS4 callback service
5016 * @cred: RPC credential to use for this call
5017 * @res: where to place the result
5018 *
5019 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5020 */
bb8b27e5
TM		 5021int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5022 unsigned short port, struct rpc_cred *cred,
5023 struct nfs4_setclientid_res *res)
1da177e4
LT		 5024{
5025 nfs4_verifier sc_verifier;
5026 struct nfs4_setclientid setclientid = {
5027 .sc_verifier = &sc_verifier,
5028 .sc_prog = program,
f4eecd5d 5029 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5030 };
5031 struct rpc_message msg = {
5032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5033 .rpc_argp = &setclientid,
bb8b27e5 5034 .rpc_resp = res,
286d7d6a 5035 .rpc_cred = cred,
1da177e4 5036 };
f11b2a1c
JL		 5037 struct rpc_task *task;
5038 struct rpc_task_setup task_setup_data = {
5039 .rpc_client = clp->cl_rpcclient,
5040 .rpc_message = &msg,
5041 .callback_ops = &nfs4_setclientid_ops,
5042 .callback_data = &setclientid,
5043 .flags = RPC_TASK_TIMEOUT,
5044 };
6bbb4ae8 5045 int status;
1da177e4 5046
de734831 5047 /* nfs_client_id4 */
f092075d 5048 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5049 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5050 setclientid.sc_name_len =
5051 nfs4_init_uniform_client_string(clp,
5052 setclientid.sc_name,
5053 sizeof(setclientid.sc_name));
5054 else
5055 setclientid.sc_name_len =
5056 nfs4_init_nonuniform_client_string(clp,
5057 setclientid.sc_name,
5058 sizeof(setclientid.sc_name));
de734831 5059 /* cb_client4 */
706cb8db
CL		 5060 setclientid.sc_netid_len =
5061 nfs4_init_callback_netid(clp,
5062 setclientid.sc_netid,
5063 sizeof(setclientid.sc_netid));
de734831 5064 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5065 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5066 clp->cl_ipaddr, port >> 8, port & 255);
5067
6bbb4ae8
CL		 5068 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5069 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5070 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5071 task = rpc_run_task(&task_setup_data);
5072 if (IS_ERR(task)) {
5073 status = PTR_ERR(task);
5074 goto out;
5075 }
5076 status = task->tk_status;
5077 if (setclientid.sc_cred) {
5078 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5079 put_rpccred(setclientid.sc_cred);
5080 }
5081 rpc_put_task(task);
5082out:
c6d01c6f 5083 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5084 dprintk("NFS reply setclientid: %d\n", status);
5085 return status;
1da177e4
LT		 5086}
5087
6bbb4ae8
CL		 5088/**
5089 * nfs4_proc_setclientid_confirm - Confirm client ID
5090 * @clp: state data structure
5091 * @res: result of a previous SETCLIENTID
5092 * @cred: RPC credential to use for this call
5093 *
5094 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5095 */
fd954ae1 5096int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5097 struct nfs4_setclientid_res *arg,
5098 struct rpc_cred *cred)
1da177e4 5099{
1da177e4
LT		 5100 struct rpc_message msg = {
5101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5102 .rpc_argp = arg,
286d7d6a 5103 .rpc_cred = cred,
1da177e4 5104 };
1da177e4
LT		 5105 int status;
5106
6bbb4ae8
CL		 5107 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5108 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5109 clp->cl_clientid);
1bd714f2 5110 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5111 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5112 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5113 return status;
5114}
5115
fe650407
TM		 5116struct nfs4_delegreturndata {
5117 struct nfs4_delegreturnargs args;
fa178f29 5118 struct nfs4_delegreturnres res;
fe650407
TM		 5119 struct nfs_fh fh;
5120 nfs4_stateid stateid;
26e976a8 5121 unsigned long timestamp;
fa178f29 5122 struct nfs_fattr fattr;
fe650407 5123 int rpc_status;
039b756a
PT		 5124 struct inode *inode;
5125 bool roc;
5126 u32 roc_barrier;
fe650407
TM		 5127};
5128
fe650407
TM		 5129static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5130{
5131 struct nfs4_delegreturndata *data = calldata;
938e1010 5132
14516c3a
TM		 5133 if (!nfs4_sequence_done(task, &data->res.seq_res))
5134 return;
938e1010 5135
ca8acf8d 5136 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5137 switch (task->tk_status) {
79708861 5138 case 0:
fa178f29 5139 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5140 case -NFS4ERR_ADMIN_REVOKED:
5141 case -NFS4ERR_DELEG_REVOKED:
5142 case -NFS4ERR_BAD_STATEID:
5143 case -NFS4ERR_OLD_STATEID:
5144 case -NFS4ERR_STALE_STATEID:
5145 case -NFS4ERR_EXPIRED:
5146 task->tk_status = 0;
039b756a
PT		 5147 if (data->roc)
5148 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5149 break;
79708861 5150 default:
8478eaa1
N		 5151 if (nfs4_async_handle_error(task, data->res.server,
5152 NULL, NULL) == -EAGAIN) {
d00c5d43 5153 rpc_restart_call_prepare(task);
79708861
RL		 5154 return;
5155 }
5156 }
5157 data->rpc_status = task->tk_status;
fe650407
TM		 5158}
5159
5160static void nfs4_delegreturn_release(void *calldata)
5161{
039b756a
PT		 5162 struct nfs4_delegreturndata *data = calldata;
5163
5164 if (data->roc)
5165 pnfs_roc_release(data->inode);
fe650407
TM		 5166 kfree(calldata);
5167}
5168
938e1010
AA		 5169static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5170{
5171 struct nfs4_delegreturndata *d_data;
5172
5173 d_data = (struct nfs4_delegreturndata *)data;
5174
039b756a
PT		 5175 if (d_data->roc &&
5176 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5177 return;
5178
d9afbd1b
TM		 5179 nfs4_setup_sequence(d_data->res.server,
5180 &d_data->args.seq_args,
5181 &d_data->res.seq_res,
5182 task);
938e1010 5183}
938e1010 5184
c8d149f3 5185static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5186 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5187 .rpc_call_done = nfs4_delegreturn_done,
5188 .rpc_release = nfs4_delegreturn_release,
5189};
5190
e6f81075 5191static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5192{
5193 struct nfs4_delegreturndata *data;
fa178f29 5194 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5195 struct rpc_task *task;
5138fde0
TM		 5196 struct rpc_message msg = {
5197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5198 .rpc_cred = cred,
5199 };
c970aa85
TM		 5200 struct rpc_task_setup task_setup_data = {
5201 .rpc_client = server->client,
5138fde0 5202 .rpc_message = &msg,
c970aa85
TM		 5203 .callback_ops = &nfs4_delegreturn_ops,
5204 .flags = RPC_TASK_ASYNC,
5205 };
e6f81075 5206 int status = 0;
fe650407 5207
8535b2be 5208 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5209 if (data == NULL)
5210 return -ENOMEM;
a9c92d6b 5211 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5212 data->args.fhandle = &data->fh;
5213 data->args.stateid = &data->stateid;
9e907fec 5214 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5215 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5216 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5217 data->res.fattr = &data->fattr;
5218 data->res.server = server;
5138fde0 5219 nfs_fattr_init(data->res.fattr);
26e976a8 5220 data->timestamp = jiffies;
fe650407 5221 data->rpc_status = 0;
039b756a
PT		 5222 data->inode = inode;
5223 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5224 pnfs_roc(inode) : false;
fe650407 5225
c970aa85 5226 task_setup_data.callback_data = data;
1174dd1f
TM		 5227 msg.rpc_argp = &data->args;
5228 msg.rpc_resp = &data->res;
c970aa85 5229 task = rpc_run_task(&task_setup_data);
7a1218a2 5230 if (IS_ERR(task))
fe650407 5231 return PTR_ERR(task);
e6f81075
TM		 5232 if (!issync)
5233 goto out;
fe650407 5234 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5235 if (status != 0)
5236 goto out;
5237 status = data->rpc_status;
e144cbcc
TM		 5238 if (status == 0)
5239 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5240 else
5241 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5242out:
e6b3c4db 5243 rpc_put_task(task);
fe650407 5244 return status;
1da177e4
LT		 5245}
5246
e6f81075 5247int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5248{
5249 struct nfs_server *server = NFS_SERVER(inode);
5250 struct nfs4_exception exception = { };
5251 int err;
5252 do {
e6f81075 5253 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5254 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5255 switch (err) {
5256 case -NFS4ERR_STALE_STATEID:
5257 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5258 case 0:
5259 return 0;
5260 }
5261 err = nfs4_handle_exception(server, err, &exception);
5262 } while (exception.retry);
5263 return err;
5264}
5265
5266#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5267#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5268
5269/*
5270 * sleep, with exponential backoff, and retry the LOCK operation.
5271 */
5272static unsigned long
5273nfs4_set_lock_task_retry(unsigned long timeout)
5274{
416ad3c9 5275 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5276 timeout <<= 1;
5277 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5278 return NFS4_LOCK_MAXTIMEOUT;
5279 return timeout;
5280}
5281
1da177e4
LT		 5282static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5283{
5284 struct inode *inode = state->inode;
5285 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5286 struct nfs_client *clp = server->nfs_client;
911d1aaf 5287 struct nfs_lockt_args arg = {
1da177e4 5288 .fh = NFS_FH(inode),
911d1aaf 5289 .fl = request,
1da177e4 5290 };
911d1aaf
TM		 5291 struct nfs_lockt_res res = {
5292 .denied = request,
1da177e4
LT		 5293 };
5294 struct rpc_message msg = {
5295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5296 .rpc_argp = &arg,
5297 .rpc_resp = &res,
5298 .rpc_cred = state->owner->so_cred,
5299 };
1da177e4
LT		 5300 struct nfs4_lock_state *lsp;
5301 int status;
5302
911d1aaf 5303 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5304 status = nfs4_set_lock_state(state, request);
5305 if (status != 0)
5306 goto out;
5307 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5308 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5309 arg.lock_owner.s_dev = server->s_dev;
7c513058 5310 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5311 switch (status) {
5312 case 0:
5313 request->fl_type = F_UNLCK;
5314 break;
5315 case -NFS4ERR_DENIED:
5316 status = 0;
1da177e4 5317 }
70cc6487 5318 request->fl_ops->fl_release_private(request);
a6f951dd 5319 request->fl_ops = NULL;
8d0a8a9d 5320out:
1da177e4
LT		 5321 return status;
5322}
5323
5324static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5325{
5326 struct nfs4_exception exception = { };
5327 int err;
5328
5329 do {
d1b748a5
TM		 5330 err = _nfs4_proc_getlk(state, cmd, request);
5331 trace_nfs4_get_lock(request, state, cmd, err);
5332 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5333 &exception);
5334 } while (exception.retry);
5335 return err;
5336}
5337
5338static int do_vfs_lock(struct file *file, struct file_lock *fl)
5339{
5340 int res = 0;
5341 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5342 case FL_POSIX:
5343 res = posix_lock_file_wait(file, fl);
5344 break;
5345 case FL_FLOCK:
5346 res = flock_lock_file_wait(file, fl);
5347 break;
5348 default:
5349 BUG();
5350 }
1da177e4
LT		 5351 return res;
5352}
5353
faf5f49c 5354struct nfs4_unlockdata {
911d1aaf
TM		 5355 struct nfs_locku_args arg;
5356 struct nfs_locku_res res;
faf5f49c
TM		 5357 struct nfs4_lock_state *lsp;
5358 struct nfs_open_context *ctx;
911d1aaf
TM		 5359 struct file_lock fl;
5360 const struct nfs_server *server;
26e976a8 5361 unsigned long timestamp;
faf5f49c
TM		 5362};
5363
911d1aaf
TM		 5364static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5365 struct nfs_open_context *ctx,
5366 struct nfs4_lock_state *lsp,
5367 struct nfs_seqid *seqid)
5368{
5369 struct nfs4_unlockdata *p;
5370 struct inode *inode = lsp->ls_state->inode;
5371
8535b2be 5372 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5373 if (p == NULL)
5374 return NULL;
5375 p->arg.fh = NFS_FH(inode);
5376 p->arg.fl = &p->fl;
5377 p->arg.seqid = seqid;
c1d51931 5378 p->res.seqid = seqid;
911d1aaf
TM		 5379 p->arg.stateid = &lsp->ls_stateid;
5380 p->lsp = lsp;
5381 atomic_inc(&lsp->ls_count);
5382 /* Ensure we don't close file until we're done freeing locks! */
5383 p->ctx = get_nfs_open_context(ctx);
5384 memcpy(&p->fl, fl, sizeof(p->fl));
5385 p->server = NFS_SERVER(inode);
5386 return p;
5387}
5388
06f814a3 5389static void nfs4_locku_release_calldata(void *data)
faf5f49c 5390{
963d8fe5 5391 struct nfs4_unlockdata *calldata = data;
911d1aaf 5392 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5393 nfs4_put_lock_state(calldata->lsp);
5394 put_nfs_open_context(calldata->ctx);
5395 kfree(calldata);
faf5f49c
TM		 5396}
5397
963d8fe5 5398static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5399{
963d8fe5 5400 struct nfs4_unlockdata *calldata = data;
faf5f49c 5401
14516c3a
TM		 5402 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5403 return;
faf5f49c
TM		 5404 switch (task->tk_status) {
5405 case 0:
f597c537
TM		 5406 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5407 &calldata->res.stateid);
26e976a8 5408 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5409 break;
9e33bed5
TM		 5410 case -NFS4ERR_BAD_STATEID:
5411 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5412 case -NFS4ERR_STALE_STATEID:
5413 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5414 break;
5415 default:
8478eaa1
N		 5416 if (nfs4_async_handle_error(task, calldata->server,
5417 NULL, NULL) == -EAGAIN)
d00c5d43 5418 rpc_restart_call_prepare(task);
faf5f49c 5419 }
2b1bc308 5420 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5421}
5422
4ce70ada 5423static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5424{
4ce70ada 5425 struct nfs4_unlockdata *calldata = data;
faf5f49c 5426
911d1aaf 5427 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5428 goto out_wait;
795a88c9 5429 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5430 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5431 goto out_no_action;
faf5f49c 5432 }
26e976a8 5433 calldata->timestamp = jiffies;
035168ab 5434 if (nfs4_setup_sequence(calldata->server,
a893693c 5435 &calldata->arg.seq_args,
2240a9e2
TM		 5436 &calldata->res.seq_res,
5437 task) != 0)
5438 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5439 return;
5440out_no_action:
5441 task->tk_action = NULL;
5442out_wait:
5443 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5444}
5445
963d8fe5 5446static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5447 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5448 .rpc_call_done = nfs4_locku_done,
06f814a3 5449 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5450};
5451
a5d16a4d
TM		 5452static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5453 struct nfs_open_context *ctx,
5454 struct nfs4_lock_state *lsp,
5455 struct nfs_seqid *seqid)
5456{
5457 struct nfs4_unlockdata *data;
5138fde0
TM		 5458 struct rpc_message msg = {
5459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5460 .rpc_cred = ctx->cred,
5461 };
c970aa85
TM		 5462 struct rpc_task_setup task_setup_data = {
5463 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5464 .rpc_message = &msg,
c970aa85 5465 .callback_ops = &nfs4_locku_ops,
101070ca 5466 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5467 .flags = RPC_TASK_ASYNC,
5468 };
a5d16a4d 5469
fa940720
WAA		 5470 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5471 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5472
137d6aca
FF		 5473 /* Ensure this is an unlock - when canceling a lock, the
5474 * canceled lock is passed in, and it won't be an unlock.
5475 */
5476 fl->fl_type = F_UNLCK;
5477
a5d16a4d
TM		 5478 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5479 if (data == NULL) {
5480 nfs_free_seqid(seqid);
5481 return ERR_PTR(-ENOMEM);
5482 }
5483
a9c92d6b 5484 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5485 msg.rpc_argp = &data->arg;
5486 msg.rpc_resp = &data->res;
c970aa85
TM		 5487 task_setup_data.callback_data = data;
5488 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5489}
5490
faf5f49c
TM		 5491static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5492{
65b62a29
TM		 5493 struct inode *inode = state->inode;
5494 struct nfs4_state_owner *sp = state->owner;
5495 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5496 struct nfs_seqid *seqid;
1da177e4 5497 struct nfs4_lock_state *lsp;
06f814a3
TM		 5498 struct rpc_task *task;
5499 int status = 0;
536ff0f8 5500 unsigned char fl_flags = request->fl_flags;
faf5f49c 5501
8d0a8a9d 5502 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5503 /* Unlock _before_ we do the RPC call */
5504 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5505 /* Exclude nfs_delegation_claim_locks() */
5506 mutex_lock(&sp->so_delegreturn_mutex);
5507 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5508 down_read(&nfsi->rwsem);
5509 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5510 up_read(&nfsi->rwsem);
65b62a29 5511 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5512 goto out;
19e03c57
TM		 5513 }
5514 up_read(&nfsi->rwsem);
65b62a29 5515 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5516 if (status != 0)
9b073574
TM		 5517 goto out;
5518 /* Is this a delegated lock? */
8d0a8a9d 5519 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5520 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5521 goto out;
8535b2be 5522 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5523 status = -ENOMEM;
badc76dd 5524 if (IS_ERR(seqid))
9b073574 5525 goto out;
cd3758e3 5526 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5527 status = PTR_ERR(task);
5528 if (IS_ERR(task))
9b073574 5529 goto out;
a5d16a4d 5530 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5531 rpc_put_task(task);
9b073574 5532out:
536ff0f8 5533 request->fl_flags = fl_flags;
d1b748a5 5534 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5535 return status;
5536}
5537
a5d16a4d
TM		 5538struct nfs4_lockdata {
5539 struct nfs_lock_args arg;
5540 struct nfs_lock_res res;
5541 struct nfs4_lock_state *lsp;
5542 struct nfs_open_context *ctx;
5543 struct file_lock fl;
26e976a8 5544 unsigned long timestamp;
a5d16a4d
TM		 5545 int rpc_status;
5546 int cancelled;
66179efe 5547 struct nfs_server *server;
a5d16a4d
TM		 5548};
5549
5550static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5551 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5552 gfp_t gfp_mask)
1da177e4 5553{
a5d16a4d
TM		 5554 struct nfs4_lockdata *p;
5555 struct inode *inode = lsp->ls_state->inode;
1da177e4 5556 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5557
8535b2be 5558 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5559 if (p == NULL)
5560 return NULL;
5561
5562 p->arg.fh = NFS_FH(inode);
5563 p->arg.fl = &p->fl;
8535b2be 5564 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5565 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5566 goto out_free;
8535b2be 5567 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5568 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5569 goto out_free_seqid;
a5d16a4d 5570 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5571 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5572 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5573 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5574 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5575 p->lsp = lsp;
66179efe 5576 p->server = server;
a5d16a4d
TM		 5577 atomic_inc(&lsp->ls_count);
5578 p->ctx = get_nfs_open_context(ctx);
5579 memcpy(&p->fl, fl, sizeof(p->fl));
5580 return p;
2f74c0a0
TM		 5581out_free_seqid:
5582 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5583out_free:
5584 kfree(p);
5585 return NULL;
5586}
5587
5588static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5589{
5590 struct nfs4_lockdata *data = calldata;
5591 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5592
3110ff80 5593 dprintk("%s: begin!\n", __func__);
2f74c0a0 5594 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5595 goto out_wait;
a5d16a4d
TM		 5596 /* Do we need to do an open_to_lock_owner? */
5597 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5598 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5599 goto out_release_lock_seqid;
8fe72bac 5600 }
8e472f33 5601 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5602 data->arg.new_lock_owner = 1;
c1d51931 5603 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5604 } else
5605 data->arg.new_lock_owner = 0;
5d422301
TM		 5606 if (!nfs4_valid_open_stateid(state)) {
5607 data->rpc_status = -EBADF;
5608 task->tk_action = NULL;
5609 goto out_release_open_seqid;
5610 }
26e976a8 5611 data->timestamp = jiffies;
035168ab
TM		 5612 if (nfs4_setup_sequence(data->server,
5613 &data->arg.seq_args,
2240a9e2 5614 &data->res.seq_res,
d9afbd1b 5615 task) == 0)
66179efe 5616 return;
5d422301 5617out_release_open_seqid:
2240a9e2
TM		 5618 nfs_release_seqid(data->arg.open_seqid);
5619out_release_lock_seqid:
5620 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5621out_wait:
5622 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5623 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5624}
5625
a5d16a4d
TM		 5626static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5627{
5628 struct nfs4_lockdata *data = calldata;
5629
3110ff80 5630 dprintk("%s: begin!\n", __func__);
a5d16a4d 5631
14516c3a
TM		 5632 if (!nfs4_sequence_done(task, &data->res.seq_res))
5633 return;
66179efe 5634
a5d16a4d 5635 data->rpc_status = task->tk_status;
a5d16a4d 5636 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5637 if (data->rpc_status == 0)
5638 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5639 else
5640 goto out;
5641 }
5642 if (data->rpc_status == 0) {
f597c537 5643 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5644 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5645 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5646 }
a5d16a4d 5647out:
3110ff80 5648 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5649}
5650
5651static void nfs4_lock_release(void *calldata)
5652{
5653 struct nfs4_lockdata *data = calldata;
5654
3110ff80 5655 dprintk("%s: begin!\n", __func__);
2f74c0a0 5656 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5657 if (data->cancelled != 0) {
5658 struct rpc_task *task;
5659 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5660 data->arg.lock_seqid);
5661 if (!IS_ERR(task))
bf294b41 5662 rpc_put_task_async(task);
3110ff80 5663 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5664 } else
5665 nfs_free_seqid(data->arg.lock_seqid);
5666 nfs4_put_lock_state(data->lsp);
5667 put_nfs_open_context(data->ctx);
5668 kfree(data);
3110ff80 5669 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5670}
5671
5672static const struct rpc_call_ops nfs4_lock_ops = {
5673 .rpc_call_prepare = nfs4_lock_prepare,
5674 .rpc_call_done = nfs4_lock_done,
5675 .rpc_release = nfs4_lock_release,
5676};
5677
2bee72a6
TM		 5678static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5679{
2bee72a6
TM		 5680 switch (error) {
5681 case -NFS4ERR_ADMIN_REVOKED:
5682 case -NFS4ERR_BAD_STATEID:
ecac799a 5683 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5684 if (new_lock_owner != 0 ||
795a88c9 5685 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5686 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5687 break;
5688 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5689 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5690 case -NFS4ERR_EXPIRED:
5691 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5692 };
5693}
5694
afe6c27c 5695static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5696{
5697 struct nfs4_lockdata *data;
5698 struct rpc_task *task;
5138fde0
TM		 5699 struct rpc_message msg = {
5700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5701 .rpc_cred = state->owner->so_cred,
5702 };
c970aa85
TM		 5703 struct rpc_task_setup task_setup_data = {
5704 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5705 .rpc_message = &msg,
c970aa85 5706 .callback_ops = &nfs4_lock_ops,
101070ca 5707 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5708 .flags = RPC_TASK_ASYNC,
5709 };
a5d16a4d
TM		 5710 int ret;
5711
3110ff80 5712 dprintk("%s: begin!\n", __func__);
cd3758e3 5713 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5714 fl->fl_u.nfs4_fl.owner,
5715 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5716 if (data == NULL)
5717 return -ENOMEM;
5718 if (IS_SETLKW(cmd))
5719 data->arg.block = 1;
a9c92d6b 5720 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5721 msg.rpc_argp = &data->arg;
5722 msg.rpc_resp = &data->res;
c970aa85 5723 task_setup_data.callback_data = data;
8fe72bac
TM		 5724 if (recovery_type > NFS_LOCK_NEW) {
5725 if (recovery_type == NFS_LOCK_RECLAIM)
5726 data->arg.reclaim = NFS_LOCK_RECLAIM;
5727 nfs4_set_sequence_privileged(&data->arg.seq_args);
5728 }
c970aa85 5729 task = rpc_run_task(&task_setup_data);
7a1218a2 5730 if (IS_ERR(task))
a5d16a4d 5731 return PTR_ERR(task);
a5d16a4d
TM		 5732 ret = nfs4_wait_for_completion_rpc_task(task);
5733 if (ret == 0) {
5734 ret = data->rpc_status;
2bee72a6
TM		 5735 if (ret)
5736 nfs4_handle_setlk_error(data->server, data->lsp,
5737 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5738 } else
5739 data->cancelled = 1;
e6b3c4db 5740 rpc_put_task(task);
3110ff80 5741 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5742 return ret;
1da177e4
LT		 5743}
5744
5745static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5746{
202b50dc 5747 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5748 struct nfs4_exception exception = {
5749 .inode = state->inode,
5750 };
202b50dc
TM		 5751 int err;
5752
5753 do {
42a2d13e
TM		 5754 /* Cache the lock if possible... */
5755 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5756 return 0;
afe6c27c 5757 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5758 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5759 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5760 break;
5761 nfs4_handle_exception(server, err, &exception);
5762 } while (exception.retry);
5763 return err;
1da177e4
LT		 5764}
5765
5766static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5767{
202b50dc 5768 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5769 struct nfs4_exception exception = {
5770 .inode = state->inode,
5771 };
202b50dc
TM		 5772 int err;
5773
6bfc93ef
TM		 5774 err = nfs4_set_lock_state(state, request);
5775 if (err != 0)
5776 return err;
f6de7a39 5777 if (!recover_lost_locks) {
ef1820f9
N		 5778 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5779 return 0;
5780 }
202b50dc 5781 do {
42a2d13e
TM		 5782 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5783 return 0;
afe6c27c 5784 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5785 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5786 switch (err) {
5787 default:
5788 goto out;
5789 case -NFS4ERR_GRACE:
5790 case -NFS4ERR_DELAY:
5791 nfs4_handle_exception(server, err, &exception);
5792 err = 0;
5793 }
202b50dc 5794 } while (exception.retry);
a9ed2e25 5795out:
202b50dc 5796 return err;
1da177e4
LT		 5797}
5798
f062eb6c 5799#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5800/**
5801 * nfs41_check_expired_locks - possibly free a lock stateid
5802 *
5803 * @state: NFSv4 state for an inode
5804 *
5805 * Returns NFS_OK if recovery for this stateid is now finished.
5806 * Otherwise a negative NFS4ERR value is returned.
5807 */
b01dd1d8 5808static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5809{
eb64cf96 5810 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5811 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5812 struct nfs_server *server = NFS_SERVER(state->inode);
5813
b01dd1d8 5814 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5815 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5816 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5817
5818 status = nfs41_test_stateid(server,
5819 &lsp->ls_stateid,
5820 cred);
08cb47fa 5821 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5822 if (status != NFS_OK) {
3e60ffdd
CL		 5823 /* Free the stateid unless the server
5824 * informs us the stateid is unrecognized. */
89af2739
CL		 5825 if (status != -NFS4ERR_BAD_STATEID)
5826 nfs41_free_stateid(server,
ab7cb0df
TM		 5827 &lsp->ls_stateid,
5828 cred);
795a88c9 5829 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5830 ret = status;
5831 }
5832 }
5833 };
5834
5835 return ret;
5836}
5837
5838static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5839{
5840 int status = NFS_OK;
5841
5842 if (test_bit(LK_STATE_IN_USE, &state->flags))
5843 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5844 if (status != NFS_OK)
5845 status = nfs4_lock_expired(state, request);
5846 return status;
f062eb6c
BS		 5847}
5848#endif
5849
1da177e4
LT		 5850static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5851{
9a99af49 5852 struct nfs4_state_owner *sp = state->owner;
19e03c57 5853 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5854 unsigned char fl_flags = request->fl_flags;
9a99af49 5855 unsigned int seq;
8e469ebd 5856 int status = -ENOLCK;
1da177e4 5857
8e469ebd
TM		 5858 if ((fl_flags & FL_POSIX) &&
5859 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5860 goto out;
6bfc93ef 5861 /* Is this a delegated open? */
6bfc93ef
TM		 5862 status = nfs4_set_lock_state(state, request);
5863 if (status != 0)
5864 goto out;
01c3b861
TM		 5865 request->fl_flags |= FL_ACCESS;
5866 status = do_vfs_lock(request->fl_file, request);
5867 if (status < 0)
5868 goto out;
19e03c57 5869 down_read(&nfsi->rwsem);
01c3b861 5870 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5871 /* Yes: cache locks! */
01c3b861 5872 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5873 request->fl_flags = fl_flags & ~FL_SLEEP;
5874 status = do_vfs_lock(request->fl_file, request);
5875 goto out_unlock;
01c3b861 5876 }
9a99af49
TM		 5877 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5878 up_read(&nfsi->rwsem);
afe6c27c 5879 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5880 if (status != 0)
9a99af49
TM		 5881 goto out;
5882 down_read(&nfsi->rwsem);
5883 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5884 status = -NFS4ERR_DELAY;
01c3b861 5885 goto out_unlock;
9a99af49 5886 }
6bfc93ef 5887 /* Note: we always want to sleep here! */
01c3b861 5888 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5889 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5890 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5891 "manager!\n", __func__);
01c3b861 5892out_unlock:
19e03c57 5893 up_read(&nfsi->rwsem);
01c3b861
TM		 5894out:
5895 request->fl_flags = fl_flags;
1da177e4
LT		 5896 return status;
5897}
5898
5899static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5900{
a1d0b5ee
TM		 5901 struct nfs4_exception exception = {
5902 .state = state,
05ffe24f 5903 .inode = state->inode,
a1d0b5ee 5904 };
1da177e4
LT		 5905 int err;
5906
5907 do {
965b5d67 5908 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5909 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5910 if (err == -NFS4ERR_DENIED)
5911 err = -EAGAIN;
1da177e4 5912 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5913 err, &exception);
1da177e4
LT		 5914 } while (exception.retry);
5915 return err;
5916}
5917
5918static int
5919nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5920{
5921 struct nfs_open_context *ctx;
5922 struct nfs4_state *state;
5923 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5924 int status;
5925
5926 /* verify open state */
cd3758e3 5927 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5928 state = ctx->state;
5929
5930 if (request->fl_start < 0 || request->fl_end < 0)
5931 return -EINVAL;
5932
d953126a
TM		 5933 if (IS_GETLK(cmd)) {
5934 if (state != NULL)
5935 return nfs4_proc_getlk(state, F_GETLK, request);
5936 return 0;
5937 }
1da177e4
LT		 5938
5939 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5940 return -EINVAL;
5941
d953126a
TM		 5942 if (request->fl_type == F_UNLCK) {
5943 if (state != NULL)
5944 return nfs4_proc_unlck(state, cmd, request);
5945 return 0;
5946 }
1da177e4 5947
d953126a
TM		 5948 if (state == NULL)
5949 return -ENOLCK;
55725513
TM		 5950 /*
5951 * Don't rely on the VFS having checked the file open mode,
5952 * since it won't do this for flock() locks.
5953 */
f44106e2 5954 switch (request->fl_type) {
55725513
TM		 5955 case F_RDLCK:
5956 if (!(filp->f_mode & FMODE_READ))
5957 return -EBADF;
5958 break;
5959 case F_WRLCK:
5960 if (!(filp->f_mode & FMODE_WRITE))
5961 return -EBADF;
5962 }
5963
1da177e4
LT		 5964 do {
5965 status = nfs4_proc_setlk(state, cmd, request);
5966 if ((status != -EAGAIN) || IS_SETLK(cmd))
5967 break;
5968 timeout = nfs4_set_lock_task_retry(timeout);
5969 status = -ERESTARTSYS;
5970 if (signalled())
5971 break;
5972 } while(status < 0);
1da177e4
LT		 5973 return status;
5974}
5975
db4f2e63 5976int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5977{
5978 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5979 int err;
5980
5981 err = nfs4_set_lock_state(state, fl);
5982 if (err != 0)
db4f2e63 5983 return err;
4a706fa0 5984 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5985 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5986}
6b3b5496 5987
cf470c3e
TM		 5988struct nfs_release_lockowner_data {
5989 struct nfs4_lock_state *lsp;
5ae67c4f 5990 struct nfs_server *server;
cf470c3e 5991 struct nfs_release_lockowner_args args;
b7e63a10 5992 struct nfs_release_lockowner_res res;
60ea6812 5993 unsigned long timestamp;
cf470c3e
TM		 5994};
5995
fbd4bfd1
CL		 5996static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5997{
5998 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5999 struct nfs_server *server = data->server;
6000 nfs40_setup_sequence(server, &data->args.seq_args,
6001 &data->res.seq_res, task);
6002 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6003 data->timestamp = jiffies;
fbd4bfd1
CL		 6004}
6005
6006static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6007{
6008 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6009 struct nfs_server *server = data->server;
6010
b7e63a10 6011 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6012
6013 switch (task->tk_status) {
6014 case 0:
6015 renew_lease(server, data->timestamp);
6016 break;
6017 case -NFS4ERR_STALE_CLIENTID:
6018 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6019 nfs4_schedule_lease_recovery(server->nfs_client);
6020 break;
60ea6812
CL		 6021 case -NFS4ERR_LEASE_MOVED:
6022 case -NFS4ERR_DELAY:
8478eaa1
N		 6023 if (nfs4_async_handle_error(task, server,
6024 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6025 rpc_restart_call_prepare(task);
6026 }
fbd4bfd1
CL		 6027}
6028
d3c7b7cc
TM		 6029static void nfs4_release_lockowner_release(void *calldata)
6030{
cf470c3e 6031 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6032 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6033 kfree(calldata);
6034}
6035
17280175 6036static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6037 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6038 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6039 .rpc_release = nfs4_release_lockowner_release,
6040};
6041
f1cdae87
JL		 6042static void
6043nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6044{
cf470c3e 6045 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6046 struct rpc_message msg = {
6047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6048 };
6049
6050 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6051 return;
fbd4bfd1 6052
cf470c3e
TM		 6053 data = kmalloc(sizeof(*data), GFP_NOFS);
6054 if (!data)
f1cdae87 6055 return;
cf470c3e 6056 data->lsp = lsp;
5ae67c4f 6057 data->server = server;
cf470c3e
TM		 6058 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6059 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6060 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6061
cf470c3e 6062 msg.rpc_argp = &data->args;
b7e63a10
TM		 6063 msg.rpc_resp = &data->res;
6064 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6065 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6066}
6067
aa1870af
BF		 6068#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6069
64c2ce8b
AK		 6070static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6071 const void *buf, size_t buflen,
6072 int flags, int type)
6b3b5496 6073{
64c2ce8b
AK		 6074 if (strcmp(key, "") != 0)
6075 return -EINVAL;
4b580ee3 6076
64c2ce8b 6077 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6078}
6079
64c2ce8b
AK		 6080static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6081 void *buf, size_t buflen, int type)
6b3b5496 6082{
64c2ce8b
AK		 6083 if (strcmp(key, "") != 0)
6084 return -EINVAL;
aa1870af 6085
64c2ce8b 6086 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6087}
6088
64c2ce8b
AK		 6089static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6090 size_t list_len, const char *name,
6091 size_t name_len, int type)
6b3b5496 6092{
64c2ce8b 6093 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6094
096455a2
BF		 6095 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6096 return 0;
64c2ce8b
AK		 6097
6098 if (list && len <= list_len)
6099 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6100 return len;
6b3b5496
BF		 6101}
6102
c9bccef6
DQ		 6103#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6104static inline int nfs4_server_supports_labels(struct nfs_server *server)
6105{
6106 return server->caps & NFS_CAP_SECURITY_LABEL;
6107}
6108
6109static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6110 const void *buf, size_t buflen,
6111 int flags, int type)
6112{
6113 if (security_ismaclabel(key))
6114 return nfs4_set_security_label(dentry, buf, buflen);
6115
6116 return -EOPNOTSUPP;
6117}
6118
6119static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6120 void *buf, size_t buflen, int type)
6121{
6122 if (security_ismaclabel(key))
6123 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6124 return -EOPNOTSUPP;
6125}
6126
6127static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6128 size_t list_len, const char *name,
6129 size_t name_len, int type)
6130{
6131 size_t len = 0;
6132
6133 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6134 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6135 if (list && len <= list_len)
6136 security_inode_listsecurity(dentry->d_inode, list, len);
6137 }
6138 return len;
6139}
6140
6141static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6142 .prefix = XATTR_SECURITY_PREFIX,
6143 .list = nfs4_xattr_list_nfs4_label,
6144 .get = nfs4_xattr_get_nfs4_label,
6145 .set = nfs4_xattr_set_nfs4_label,
6146};
6147#endif
6148
6149
533eb461
AA		 6150/*
6151 * nfs_fhget will use either the mounted_on_fileid or the fileid
6152 */
69aaaae1
TM		 6153static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6154{
533eb461
AA		 6155 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6156 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6157 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6158 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6159 return;
6160
6161 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6162 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6163 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6164 fattr->nlink = 2;
6165}
6166
f05d147f
BS		 6167static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6168 const struct qstr *name,
6169 struct nfs4_fs_locations *fs_locations,
6170 struct page *page)
683b57b4
TM		 6171{
6172 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6173 u32 bitmask[3] = {
361e624f 6174 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6175 };
6176 struct nfs4_fs_locations_arg args = {
6177 .dir_fh = NFS_FH(dir),
c228fd3a 6178 .name = name,
683b57b4
TM		 6179 .page = page,
6180 .bitmask = bitmask,
6181 };
22958463
BH		 6182 struct nfs4_fs_locations_res res = {
6183 .fs_locations = fs_locations,
6184 };
683b57b4
TM		 6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6187 .rpc_argp = &args,
22958463 6188 .rpc_resp = &res,
683b57b4
TM		 6189 };
6190 int status;
6191
3110ff80 6192 dprintk("%s: start\n", __func__);
533eb461
AA		 6193
6194 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6195 * is not supported */
6196 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6197 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6198 else
6199 bitmask[0] |= FATTR4_WORD0_FILEID;
6200
c228fd3a 6201 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6202 fs_locations->server = server;
830b8e33 6203 fs_locations->nlocations = 0;
f05d147f 6204 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6205 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6206 return status;
6207}
6208
f05d147f
BS		 6209int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6210 const struct qstr *name,
6211 struct nfs4_fs_locations *fs_locations,
6212 struct page *page)
db0a9593
BS		 6213{
6214 struct nfs4_exception exception = { };
6215 int err;
6216 do {
078ea3df
TM		 6217 err = _nfs4_proc_fs_locations(client, dir, name,
6218 fs_locations, page);
6219 trace_nfs4_get_fs_locations(dir, name, err);
6220 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6221 &exception);
6222 } while (exception.retry);
6223 return err;
6224}
6225
b03d735b
CL		 6226/*
6227 * This operation also signals the server that this client is
6228 * performing migration recovery. The server can stop returning
6229 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6230 * appended to this compound to identify the client ID which is
6231 * performing recovery.
6232 */
6233static int _nfs40_proc_get_locations(struct inode *inode,
6234 struct nfs4_fs_locations *locations,
6235 struct page *page, struct rpc_cred *cred)
6236{
6237 struct nfs_server *server = NFS_SERVER(inode);
6238 struct rpc_clnt *clnt = server->client;
6239 u32 bitmask[2] = {
6240 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6241 };
6242 struct nfs4_fs_locations_arg args = {
6243 .clientid = server->nfs_client->cl_clientid,
6244 .fh = NFS_FH(inode),
6245 .page = page,
6246 .bitmask = bitmask,
6247 .migration = 1, /* skip LOOKUP */
6248 .renew = 1, /* append RENEW */
6249 };
6250 struct nfs4_fs_locations_res res = {
6251 .fs_locations = locations,
6252 .migration = 1,
6253 .renew = 1,
6254 };
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6257 .rpc_argp = &args,
6258 .rpc_resp = &res,
6259 .rpc_cred = cred,
6260 };
6261 unsigned long now = jiffies;
6262 int status;
6263
6264 nfs_fattr_init(&locations->fattr);
6265 locations->server = server;
6266 locations->nlocations = 0;
6267
6268 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6269 nfs4_set_sequence_privileged(&args.seq_args);
6270 status = nfs4_call_sync_sequence(clnt, server, &msg,
6271 &args.seq_args, &res.seq_res);
6272 if (status)
6273 return status;
6274
6275 renew_lease(server, now);
6276 return 0;
6277}
6278
6279#ifdef CONFIG_NFS_V4_1
6280
6281/*
6282 * This operation also signals the server that this client is
6283 * performing migration recovery. The server can stop asserting
6284 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6285 * performing this operation is identified in the SEQUENCE
6286 * operation in this compound.
6287 *
6288 * When the client supports GETATTR(fs_locations_info), it can
6289 * be plumbed in here.
6290 */
6291static int _nfs41_proc_get_locations(struct inode *inode,
6292 struct nfs4_fs_locations *locations,
6293 struct page *page, struct rpc_cred *cred)
6294{
6295 struct nfs_server *server = NFS_SERVER(inode);
6296 struct rpc_clnt *clnt = server->client;
6297 u32 bitmask[2] = {
6298 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6299 };
6300 struct nfs4_fs_locations_arg args = {
6301 .fh = NFS_FH(inode),
6302 .page = page,
6303 .bitmask = bitmask,
6304 .migration = 1, /* skip LOOKUP */
6305 };
6306 struct nfs4_fs_locations_res res = {
6307 .fs_locations = locations,
6308 .migration = 1,
6309 };
6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6312 .rpc_argp = &args,
6313 .rpc_resp = &res,
6314 .rpc_cred = cred,
6315 };
6316 int status;
6317
6318 nfs_fattr_init(&locations->fattr);
6319 locations->server = server;
6320 locations->nlocations = 0;
6321
6322 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6323 nfs4_set_sequence_privileged(&args.seq_args);
6324 status = nfs4_call_sync_sequence(clnt, server, &msg,
6325 &args.seq_args, &res.seq_res);
6326 if (status == NFS4_OK &&
6327 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6328 status = -NFS4ERR_LEASE_MOVED;
6329 return status;
6330}
6331
6332#endif /* CONFIG_NFS_V4_1 */
6333
6334/**
6335 * nfs4_proc_get_locations - discover locations for a migrated FSID
6336 * @inode: inode on FSID that is migrating
6337 * @locations: result of query
6338 * @page: buffer
6339 * @cred: credential to use for this operation
6340 *
6341 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6342 * operation failed, or a negative errno if a local error occurred.
6343 *
6344 * On success, "locations" is filled in, but if the server has
6345 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6346 * asserted.
6347 *
6348 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6349 * from this client that require migration recovery.
6350 */
6351int nfs4_proc_get_locations(struct inode *inode,
6352 struct nfs4_fs_locations *locations,
6353 struct page *page, struct rpc_cred *cred)
6354{
6355 struct nfs_server *server = NFS_SERVER(inode);
6356 struct nfs_client *clp = server->nfs_client;
6357 const struct nfs4_mig_recovery_ops *ops =
6358 clp->cl_mvops->mig_recovery_ops;
6359 struct nfs4_exception exception = { };
6360 int status;
6361
6362 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6363 (unsigned long long)server->fsid.major,
6364 (unsigned long long)server->fsid.minor,
6365 clp->cl_hostname);
6366 nfs_display_fhandle(NFS_FH(inode), __func__);
6367
6368 do {
6369 status = ops->get_locations(inode, locations, page, cred);
6370 if (status != -NFS4ERR_DELAY)
6371 break;
6372 nfs4_handle_exception(server, status, &exception);
6373 } while (exception.retry);
6374 return status;
6375}
6376
44c99933
CL		 6377/*
6378 * This operation also signals the server that this client is
6379 * performing "lease moved" recovery. The server can stop
6380 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6381 * is appended to this compound to identify the client ID which is
6382 * performing recovery.
6383 */
6384static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6385{
6386 struct nfs_server *server = NFS_SERVER(inode);
6387 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6388 struct rpc_clnt *clnt = server->client;
6389 struct nfs4_fsid_present_arg args = {
6390 .fh = NFS_FH(inode),
6391 .clientid = clp->cl_clientid,
6392 .renew = 1, /* append RENEW */
6393 };
6394 struct nfs4_fsid_present_res res = {
6395 .renew = 1,
6396 };
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6399 .rpc_argp = &args,
6400 .rpc_resp = &res,
6401 .rpc_cred = cred,
6402 };
6403 unsigned long now = jiffies;
6404 int status;
6405
6406 res.fh = nfs_alloc_fhandle();
6407 if (res.fh == NULL)
6408 return -ENOMEM;
6409
6410 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6411 nfs4_set_sequence_privileged(&args.seq_args);
6412 status = nfs4_call_sync_sequence(clnt, server, &msg,
6413 &args.seq_args, &res.seq_res);
6414 nfs_free_fhandle(res.fh);
6415 if (status)
6416 return status;
6417
6418 do_renew_lease(clp, now);
6419 return 0;
6420}
6421
6422#ifdef CONFIG_NFS_V4_1
6423
6424/*
6425 * This operation also signals the server that this client is
6426 * performing "lease moved" recovery. The server can stop asserting
6427 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6428 * this operation is identified in the SEQUENCE operation in this
6429 * compound.
6430 */
6431static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6432{
6433 struct nfs_server *server = NFS_SERVER(inode);
6434 struct rpc_clnt *clnt = server->client;
6435 struct nfs4_fsid_present_arg args = {
6436 .fh = NFS_FH(inode),
6437 };
6438 struct nfs4_fsid_present_res res = {
6439 };
6440 struct rpc_message msg = {
6441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6442 .rpc_argp = &args,
6443 .rpc_resp = &res,
6444 .rpc_cred = cred,
6445 };
6446 int status;
6447
6448 res.fh = nfs_alloc_fhandle();
6449 if (res.fh == NULL)
6450 return -ENOMEM;
6451
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 nfs_free_fhandle(res.fh);
6457 if (status == NFS4_OK &&
6458 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6459 status = -NFS4ERR_LEASE_MOVED;
6460 return status;
6461}
6462
6463#endif /* CONFIG_NFS_V4_1 */
6464
6465/**
6466 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6467 * @inode: inode on FSID to check
6468 * @cred: credential to use for this operation
6469 *
6470 * Server indicates whether the FSID is present, moved, or not
6471 * recognized. This operation is necessary to clear a LEASE_MOVED
6472 * condition for this client ID.
6473 *
6474 * Returns NFS4_OK if the FSID is present on this server,
6475 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6476 * NFS4ERR code if some error occurred on the server, or a
6477 * negative errno if a local failure occurred.
6478 */
6479int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6480{
6481 struct nfs_server *server = NFS_SERVER(inode);
6482 struct nfs_client *clp = server->nfs_client;
6483 const struct nfs4_mig_recovery_ops *ops =
6484 clp->cl_mvops->mig_recovery_ops;
6485 struct nfs4_exception exception = { };
6486 int status;
6487
6488 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6489 (unsigned long long)server->fsid.major,
6490 (unsigned long long)server->fsid.minor,
6491 clp->cl_hostname);
6492 nfs_display_fhandle(NFS_FH(inode), __func__);
6493
6494 do {
6495 status = ops->fsid_present(inode, cred);
6496 if (status != -NFS4ERR_DELAY)
6497 break;
6498 nfs4_handle_exception(server, status, &exception);
6499 } while (exception.retry);
6500 return status;
6501}
6502
5ec16a85 6503/**
a5250def
WAA		 6504 * If 'use_integrity' is true and the state managment nfs_client
6505 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6506 * and the machine credential as per RFC3530bis and RFC5661 Security
6507 * Considerations sections. Otherwise, just use the user cred with the
6508 * filesystem's rpc_client.
5ec16a85 6509 */
a5250def 6510static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6511{
6512 int status;
6513 struct nfs4_secinfo_arg args = {
6514 .dir_fh = NFS_FH(dir),
6515 .name = name,
6516 };
6517 struct nfs4_secinfo_res res = {
6518 .flavors = flavors,
6519 };
6520 struct rpc_message msg = {
6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6522 .rpc_argp = &args,
6523 .rpc_resp = &res,
6524 };
a5250def 6525 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6526 struct rpc_cred *cred = NULL;
a5250def
WAA		 6527
6528 if (use_integrity) {
6529 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6530 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6531 msg.rpc_cred = cred;
a5250def 6532 }
5a5ea0d4
BS		 6533
6534 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6535
6536 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6537 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6538
a5250def
WAA		 6539 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6540 &res.seq_res, 0);
5a5ea0d4 6541 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6542
7cb852df
WAA		 6543 if (cred)
6544 put_rpccred(cred);
a5250def 6545
5a5ea0d4
BS		 6546 return status;
6547}
6548
72de53ec
BS		 6549int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6550 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6551{
6552 struct nfs4_exception exception = { };
6553 int err;
6554 do {
a5250def
WAA		 6555 err = -NFS4ERR_WRONGSEC;
6556
6557 /* try to use integrity protection with machine cred */
6558 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6559 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6560
6561 /*
6562 * if unable to use integrity protection, or SECINFO with
6563 * integrity protection returns NFS4ERR_WRONGSEC (which is
6564 * disallowed by spec, but exists in deployed servers) use
6565 * the current filesystem's rpc_client and the user cred.
6566 */
6567 if (err == -NFS4ERR_WRONGSEC)
6568 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6569
078ea3df
TM		 6570 trace_nfs4_secinfo(dir, name, err);
6571 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6572 &exception);
6573 } while (exception.retry);
6574 return err;
6575}
6576
557134a3 6577#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6578/*
6579 * Check the exchange flags returned by the server for invalid flags, having
6580 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6581 * DS flags set.
6582 */
6583static int nfs4_check_cl_exchange_flags(u32 flags)
6584{
6585 if (flags & ~EXCHGID4_FLAG_MASK_R)
6586 goto out_inval;
6587 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6588 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6589 goto out_inval;
6590 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6591 goto out_inval;
6592 return NFS_OK;
6593out_inval:
6594 return -NFS4ERR_INVAL;
6595}
6596
78fe0f41 6597static bool
79d4e1f0
CL		 6598nfs41_same_server_scope(struct nfs41_server_scope *a,
6599 struct nfs41_server_scope *b)
78fe0f41
WAA		 6600{
6601 if (a->server_scope_sz == b->server_scope_sz &&
6602 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6603 return true;
6604
6605 return false;
6606}
6607
7c44f1ae
WAA		 6608/*
6609 * nfs4_proc_bind_conn_to_session()
6610 *
6611 * The 4.1 client currently uses the same TCP connection for the
6612 * fore and backchannel.
6613 */
2cf047c9 6614int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6615{
6616 int status;
6617 struct nfs41_bind_conn_to_session_res res;
6618 struct rpc_message msg = {
6619 .rpc_proc =
6620 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6621 .rpc_argp = clp,
6622 .rpc_resp = &res,
2cf047c9 6623 .rpc_cred = cred,
7c44f1ae
WAA		 6624 };
6625
6626 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6627
6628 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6629 if (unlikely(res.session == NULL)) {
6630 status = -ENOMEM;
6631 goto out;
6632 }
6633
6634 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6635 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6636 if (status == 0) {
6637 if (memcmp(res.session->sess_id.data,
6638 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6639 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6640 status = -EIO;
6641 goto out_session;
6642 }
6643 if (res.dir != NFS4_CDFS4_BOTH) {
6644 dprintk("NFS: %s: Unexpected direction from server\n",
6645 __func__);
6646 status = -EIO;
6647 goto out_session;
6648 }
6649 if (res.use_conn_in_rdma_mode) {
6650 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6651 __func__);
6652 status = -EIO;
6653 goto out_session;
6654 }
6655 }
6656out_session:
6657 kfree(res.session);
6658out:
6659 dprintk("<-- %s status= %d\n", __func__, status);
6660 return status;
6661}
6662
99fe60d0 6663/*
fa940720
WAA		 6664 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6665 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6666 */
6667static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6668 .how = SP4_MACH_CRED,
6669 .enforce.u.words = {
6670 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6671 1 << (OP_EXCHANGE_ID - 32) |
6672 1 << (OP_CREATE_SESSION - 32) |
6673 1 << (OP_DESTROY_SESSION - 32) |
6674 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6675 },
6676 .allow.u.words = {
6677 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6678 1 << (OP_LOCKU) |
6679 1 << (OP_COMMIT),
8b5bee2e 6680 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6681 1 << (OP_SECINFO_NO_NAME - 32) |
6682 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6683 1 << (OP_FREE_STATEID - 32) |
6684 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6685 }
6686};
6687
6688/*
6689 * Select the state protection mode for client `clp' given the server results
6690 * from exchange_id in `sp'.
99fe60d0 6691 *
2031cd1a
WAA		 6692 * Returns 0 on success, negative errno otherwise.
6693 */
6694static int nfs4_sp4_select_mode(struct nfs_client *clp,
6695 struct nfs41_state_protection *sp)
6696{
6697 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6698 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6699 1 << (OP_EXCHANGE_ID - 32) |
6700 1 << (OP_CREATE_SESSION - 32) |
6701 1 << (OP_DESTROY_SESSION - 32) |
6702 1 << (OP_DESTROY_CLIENTID - 32)
6703 };
6704 unsigned int i;
6705
6706 if (sp->how == SP4_MACH_CRED) {
6707 /* Print state protect result */
6708 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6709 for (i = 0; i <= LAST_NFS4_OP; i++) {
6710 if (test_bit(i, sp->enforce.u.longs))
6711 dfprintk(MOUNT, " enforce op %d\n", i);
6712 if (test_bit(i, sp->allow.u.longs))
6713 dfprintk(MOUNT, " allow op %d\n", i);
6714 }
6715
6716 /* make sure nothing is on enforce list that isn't supported */
6717 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6718 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6719 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6720 return -EINVAL;
6721 }
6722 }
6723
6724 /*
6725 * Minimal mode - state operations are allowed to use machine
6726 * credential. Note this already happens by default, so the
6727 * client doesn't have to do anything more than the negotiation.
6728 *
6729 * NOTE: we don't care if EXCHANGE_ID is in the list -
6730 * we're already using the machine cred for exchange_id
6731 * and will never use a different cred.
6732 */
6733 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6734 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6735 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6736 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6737 dfprintk(MOUNT, "sp4_mach_cred:\n");
6738 dfprintk(MOUNT, " minimal mode enabled\n");
6739 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6740 } else {
6741 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6742 return -EINVAL;
6743 }
fa940720
WAA		 6744
6745 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6746 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6747 dfprintk(MOUNT, " cleanup mode enabled\n");
6748 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6749 }
8b5bee2e
WAA		 6750
6751 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6752 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6753 dfprintk(MOUNT, " secinfo mode enabled\n");
6754 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6755 }
3787d506
WAA		 6756
6757 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6758 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6759 dfprintk(MOUNT, " stateid mode enabled\n");
6760 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6761 }
8c21c62c
WAA		 6762
6763 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6764 dfprintk(MOUNT, " write mode enabled\n");
6765 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6766 }
6767
6768 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6769 dfprintk(MOUNT, " commit mode enabled\n");
6770 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6771 }
2031cd1a
WAA		 6772 }
6773
6774 return 0;
6775}
6776
6777/*
6778 * _nfs4_proc_exchange_id()
6bbb4ae8 6779 *
2031cd1a 6780 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6781 */
2031cd1a
WAA		 6782static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6783 u32 sp4_how)
99fe60d0
BH		 6784{
6785 nfs4_verifier verifier;
6786 struct nfs41_exchange_id_args args = {
cd93710e 6787 .verifier = &verifier,
99fe60d0 6788 .client = clp,
cd3fadec 6789#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6790 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6791 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6792 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6793#else
6794 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6795 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6796#endif
99fe60d0
BH		 6797 };
6798 struct nfs41_exchange_id_res res = {
32b01310 6799 0
99fe60d0
BH		 6800 };
6801 int status;
6802 struct rpc_message msg = {
6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6804 .rpc_argp = &args,
6805 .rpc_resp = &res,
6806 .rpc_cred = cred,
6807 };
99fe60d0 6808
f092075d 6809 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6810 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6811 sizeof(args.id));
6bbb4ae8
CL		 6812 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6813 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6814 args.id_len, args.id);
99fe60d0 6815
acdeb69d 6816 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6817 GFP_NOFS);
acdeb69d 6818 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6819 status = -ENOMEM;
6820 goto out;
6821 }
78fe0f41 6822
79d4e1f0 6823 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6824 GFP_NOFS);
177313f1 6825 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6826 status = -ENOMEM;
acdeb69d 6827 goto out_server_owner;
abe9a6d5 6828 }
78fe0f41 6829
bbafffd2 6830 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6831 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6832 status = -ENOMEM;
6833 goto out_server_scope;
6834 }
6835
2031cd1a
WAA		 6836 switch (sp4_how) {
6837 case SP4_NONE:
6838 args.state_protect.how = SP4_NONE;
6839 break;
6840
6841 case SP4_MACH_CRED:
6842 args.state_protect = nfs4_sp4_mach_cred_request;
6843 break;
6844
6845 default:
6846 /* unsupported! */
6847 WARN_ON_ONCE(1);
6848 status = -EINVAL;
6849 goto out_server_scope;
6850 }
6851
1bd714f2 6852 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6853 trace_nfs4_exchange_id(clp, status);
177313f1 6854 if (status == 0)
32b01310 6855 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6856
2031cd1a
WAA		 6857 if (status == 0)
6858 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6859
acdeb69d 6860 if (status == 0) {
32b01310
TM		 6861 clp->cl_clientid = res.clientid;
6862 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6863 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6864 clp->cl_seqid = res.seqid;
6865
acdeb69d
CL		 6866 kfree(clp->cl_serverowner);
6867 clp->cl_serverowner = res.server_owner;
6868 res.server_owner = NULL;
78fe0f41 6869
7d2ed9ac 6870 /* use the most recent implementation id */
59155546
CL		 6871 kfree(clp->cl_implid);
6872 clp->cl_implid = res.impl_id;
7d2ed9ac 6873
177313f1 6874 if (clp->cl_serverscope != NULL &&
79d4e1f0 6875 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6876 res.server_scope)) {
6877 dprintk("%s: server_scope mismatch detected\n",
6878 __func__);
6879 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6880 kfree(clp->cl_serverscope);
6881 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6882 }
6883
177313f1 6884 if (clp->cl_serverscope == NULL) {
79d4e1f0 6885 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6886 goto out;
6887 }
32b01310
TM		 6888 } else
6889 kfree(res.impl_id);
7d2ed9ac 6890
acdeb69d
CL		 6891out_server_owner:
6892 kfree(res.server_owner);
7d2ed9ac 6893out_server_scope:
abe9a6d5
WAA		 6894 kfree(res.server_scope);
6895out:
177313f1 6896 if (clp->cl_implid != NULL)
6bbb4ae8 6897 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6898 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6899 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6900 clp->cl_implid->date.seconds,
6901 clp->cl_implid->date.nseconds);
6bbb4ae8 6902 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6903 return status;
6904}
6905
2031cd1a
WAA		 6906/*
6907 * nfs4_proc_exchange_id()
6908 *
6909 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6910 *
6911 * Since the clientid has expired, all compounds using sessions
6912 * associated with the stale clientid will be returning
6913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6914 * be in some phase of session reset.
6915 *
6916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6917 */
6918int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6919{
6920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6921 int status;
6922
6923 /* try SP4_MACH_CRED if krb5i/p */
6924 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6925 authflavor == RPC_AUTH_GSS_KRB5P) {
6926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6927 if (!status)
6928 return 0;
6929 }
6930
6931 /* try SP4_NONE */
6932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6933}
6934
66245539
TM		 6935static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6936 struct rpc_cred *cred)
6937{
6938 struct rpc_message msg = {
6939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6940 .rpc_argp = clp,
6941 .rpc_cred = cred,
6942 };
6943 int status;
6944
6945 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6946 trace_nfs4_destroy_clientid(clp, status);
66245539 6947 if (status)
02c67525 6948 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6949 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6950 return status;
6951}
6952
6953static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6954 struct rpc_cred *cred)
6955{
6956 unsigned int loop;
6957 int ret;
6958
6959 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6960 ret = _nfs4_proc_destroy_clientid(clp, cred);
6961 switch (ret) {
6962 case -NFS4ERR_DELAY:
6963 case -NFS4ERR_CLIENTID_BUSY:
6964 ssleep(1);
6965 break;
6966 default:
6967 return ret;
6968 }
6969 }
6970 return 0;
6971}
6972
6973int nfs4_destroy_clientid(struct nfs_client *clp)
6974{
6975 struct rpc_cred *cred;
6976 int ret = 0;
6977
6978 if (clp->cl_mvops->minor_version < 1)
6979 goto out;
6980 if (clp->cl_exchange_flags == 0)
6981 goto out;
05f4c350
CL		 6982 if (clp->cl_preserve_clid)
6983 goto out;
73d8bde5 6984 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6985 ret = nfs4_proc_destroy_clientid(clp, cred);
6986 if (cred)
6987 put_rpccred(cred);
6988 switch (ret) {
6989 case 0:
6990 case -NFS4ERR_STALE_CLIENTID:
6991 clp->cl_exchange_flags = 0;
6992 }
6993out:
6994 return ret;
6995}
6996
2050f0cc
AA		 6997struct nfs4_get_lease_time_data {
6998 struct nfs4_get_lease_time_args *args;
6999 struct nfs4_get_lease_time_res *res;
7000 struct nfs_client *clp;
7001};
7002
7003static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7004 void *calldata)
7005{
2050f0cc
AA		 7006 struct nfs4_get_lease_time_data *data =
7007 (struct nfs4_get_lease_time_data *)calldata;
7008
7009 dprintk("--> %s\n", __func__);
7010 /* just setup sequence, do not trigger session recovery
7011 since we're invoked within one */
d9afbd1b
TM		 7012 nfs41_setup_sequence(data->clp->cl_session,
7013 &data->args->la_seq_args,
7014 &data->res->lr_seq_res,
7015 task);
2050f0cc
AA		 7016 dprintk("<-- %s\n", __func__);
7017}
7018
7019/*
7020 * Called from nfs4_state_manager thread for session setup, so don't recover
7021 * from sequence operation or clientid errors.
7022 */
7023static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7024{
7025 struct nfs4_get_lease_time_data *data =
7026 (struct nfs4_get_lease_time_data *)calldata;
7027
7028 dprintk("--> %s\n", __func__);
14516c3a
TM		 7029 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7030 return;
2050f0cc
AA		 7031 switch (task->tk_status) {
7032 case -NFS4ERR_DELAY:
7033 case -NFS4ERR_GRACE:
7034 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7035 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7036 task->tk_status = 0;
a8a4ae3a
AA		 7037 /* fall through */
7038 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7039 rpc_restart_call_prepare(task);
2050f0cc
AA		 7040 return;
7041 }
2050f0cc
AA		 7042 dprintk("<-- %s\n", __func__);
7043}
7044
17280175 7045static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7046 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7047 .rpc_call_done = nfs4_get_lease_time_done,
7048};
7049
7050int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7051{
7052 struct rpc_task *task;
7053 struct nfs4_get_lease_time_args args;
7054 struct nfs4_get_lease_time_res res = {
7055 .lr_fsinfo = fsinfo,
7056 };
7057 struct nfs4_get_lease_time_data data = {
7058 .args = &args,
7059 .res = &res,
7060 .clp = clp,
7061 };
7062 struct rpc_message msg = {
7063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7064 .rpc_argp = &args,
7065 .rpc_resp = &res,
7066 };
7067 struct rpc_task_setup task_setup = {
7068 .rpc_client = clp->cl_rpcclient,
7069 .rpc_message = &msg,
7070 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7071 .callback_data = &data,
7072 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7073 };
7074 int status;
7075
a9c92d6b 7076 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7077 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7078 dprintk("--> %s\n", __func__);
7079 task = rpc_run_task(&task_setup);
7080
7081 if (IS_ERR(task))
7082 status = PTR_ERR(task);
7083 else {
7084 status = task->tk_status;
7085 rpc_put_task(task);
7086 }
7087 dprintk("<-- %s return %d\n", __func__, status);
7088
7089 return status;
7090}
7091
fc931582
AA		 7092/*
7093 * Initialize the values to be used by the client in CREATE_SESSION
7094 * If nfs4_init_session set the fore channel request and response sizes,
7095 * use them.
7096 *
7097 * Set the back channel max_resp_sz_cached to zero to force the client to
7098 * always set csa_cachethis to FALSE because the current implementation
7099 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7100 */
7101static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7102{
18aad3d5
AA		 7103 unsigned int max_rqst_sz, max_resp_sz;
7104
7105 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7106 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7107
fc931582 7108 /* Fore channel attributes */
18aad3d5
AA		 7109 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7110 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7111 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7112 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7113
7114 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7115 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7116 __func__,
7117 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7118 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7119
7120 /* Back channel attributes */
fc931582
AA		 7121 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7122 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7123 args->bc_attrs.max_resp_sz_cached = 0;
7124 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7125 args->bc_attrs.max_reqs = 1;
7126
7127 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7128 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7129 __func__,
7130 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7131 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7132 args->bc_attrs.max_reqs);
7133}
7134
43c2e885 7135static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7136{
43c2e885
BF		 7137 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7138 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7139
43c2e885
BF		 7140 if (rcvd->max_resp_sz > sent->max_resp_sz)
7141 return -EINVAL;
7142 /*
7143 * Our requested max_ops is the minimum we need; we're not
7144 * prepared to break up compounds into smaller pieces than that.
7145 * So, no point even trying to continue if the server won't
7146 * cooperate:
7147 */
7148 if (rcvd->max_ops < sent->max_ops)
7149 return -EINVAL;
7150 if (rcvd->max_reqs == 0)
7151 return -EINVAL;
b4b9a0c1
VG		 7152 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7153 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7154 return 0;
8d35301d
AA		 7155}
7156
43c2e885
BF		 7157static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7158{
7159 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7160 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7161
43c2e885
BF		 7162 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7163 return -EINVAL;
7164 if (rcvd->max_resp_sz < sent->max_resp_sz)
7165 return -EINVAL;
7166 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7167 return -EINVAL;
7168 /* These would render the backchannel useless: */
b4b9a0c1 7169 if (rcvd->max_ops != sent->max_ops)
43c2e885 7170 return -EINVAL;
b4b9a0c1 7171 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7172 return -EINVAL;
7173 return 0;
7174}
8d35301d 7175
8d35301d
AA		 7176static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7177 struct nfs4_session *session)
7178{
43c2e885 7179 int ret;
8d35301d 7180
43c2e885
BF		 7181 ret = nfs4_verify_fore_channel_attrs(args, session);
7182 if (ret)
7183 return ret;
7184 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7185}
7186
848f5bda
TM		 7187static int _nfs4_proc_create_session(struct nfs_client *clp,
7188 struct rpc_cred *cred)
fc931582
AA		 7189{
7190 struct nfs4_session *session = clp->cl_session;
7191 struct nfs41_create_session_args args = {
7192 .client = clp,
7193 .cb_program = NFS4_CALLBACK,
7194 };
7195 struct nfs41_create_session_res res = {
7196 .client = clp,
7197 };
7198 struct rpc_message msg = {
7199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7200 .rpc_argp = &args,
7201 .rpc_resp = &res,
848f5bda 7202 .rpc_cred = cred,
fc931582
AA		 7203 };
7204 int status;
7205
7206 nfs4_init_channel_attrs(&args);
0f91421e 7207 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7208
1bd714f2 7209 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7210 trace_nfs4_create_session(clp, status);
fc931582 7211
43095d39 7212 if (!status) {
8d35301d
AA		 7213 /* Verify the session's negotiated channel_attrs values */
7214 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7215 /* Increment the clientid slot sequence id */
7216 clp->cl_seqid++;
7217 }
7218
7219 return status;
7220}
7221
7222/*
7223 * Issues a CREATE_SESSION operation to the server.
7224 * It is the responsibility of the caller to verify the session is
7225 * expired before calling this routine.
7226 */
848f5bda 7227int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7228{
7229 int status;
7230 unsigned *ptr;
fc931582
AA		 7231 struct nfs4_session *session = clp->cl_session;
7232
7233 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7234
848f5bda 7235 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7236 if (status)
7237 goto out;
7238
aacd5537
AA		 7239 /* Init or reset the session slot tables */
7240 status = nfs4_setup_session_slot_tables(session);
7241 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7242 if (status)
7243 goto out;
7244
7245 ptr = (unsigned *)&session->sess_id.data[0];
7246 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7247 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7248out:
7249 dprintk("<-- %s\n", __func__);
7250 return status;
7251}
7252
0f3e66c6
AA		 7253/*
7254 * Issue the over-the-wire RPC DESTROY_SESSION.
7255 * The caller must serialize access to this routine.
7256 */
848f5bda
TM		 7257int nfs4_proc_destroy_session(struct nfs4_session *session,
7258 struct rpc_cred *cred)
0f3e66c6 7259{
848f5bda
TM		 7260 struct rpc_message msg = {
7261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7262 .rpc_argp = session,
7263 .rpc_cred = cred,
7264 };
0f3e66c6 7265 int status = 0;
0f3e66c6
AA		 7266
7267 dprintk("--> nfs4_proc_destroy_session\n");
7268
7269 /* session is still being setup */
7270 if (session->clp->cl_cons_state != NFS_CS_READY)
7271 return status;
7272
1bd714f2 7273 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7274 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7275
7276 if (status)
08106ac7 7277 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7278 "Session has been destroyed regardless...\n", status);
7279
7280 dprintk("<-- nfs4_proc_destroy_session\n");
7281 return status;
7282}
7283
fc01cea9
AA		 7284/*
7285 * Renew the cl_session lease.
7286 */
d5f8d3fe
TM		 7287struct nfs4_sequence_data {
7288 struct nfs_client *clp;
7289 struct nfs4_sequence_args args;
7290 struct nfs4_sequence_res res;
7291};
7292
dc96aef9
AB		 7293static void nfs41_sequence_release(void *data)
7294{
d5f8d3fe
TM		 7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
dc96aef9 7297
7135840f
AB		 7298 if (atomic_read(&clp->cl_count) > 1)
7299 nfs4_schedule_state_renewal(clp);
7300 nfs_put_client(clp);
d5f8d3fe 7301 kfree(calldata);
dc96aef9
AB		 7302}
7303
aa5190d0
TM		 7304static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7305{
7306 switch(task->tk_status) {
7307 case -NFS4ERR_DELAY:
aa5190d0
TM		 7308 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7309 return -EAGAIN;
7310 default:
0400a6b0 7311 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7312 }
7313 return 0;
7314}
7315
dc96aef9 7316static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7317{
d5f8d3fe
TM		 7318 struct nfs4_sequence_data *calldata = data;
7319 struct nfs_client *clp = calldata->clp;
fc01cea9 7320
14516c3a
TM		 7321 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7322 return;
fc01cea9 7323
c6d01c6f 7324 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7325 if (task->tk_status < 0) {
7326 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7327 if (atomic_read(&clp->cl_count) == 1)
7328 goto out;
fc01cea9 7329
aa5190d0
TM		 7330 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7331 rpc_restart_call_prepare(task);
fc01cea9
AA		 7332 return;
7333 }
7334 }
fc01cea9 7335 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7336out:
fc01cea9
AA		 7337 dprintk("<-- %s\n", __func__);
7338}
7339
7340static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7341{
d5f8d3fe
TM		 7342 struct nfs4_sequence_data *calldata = data;
7343 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7344 struct nfs4_sequence_args *args;
7345 struct nfs4_sequence_res *res;
7346
fc01cea9
AA		 7347 args = task->tk_msg.rpc_argp;
7348 res = task->tk_msg.rpc_resp;
7349
d9afbd1b 7350 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7351}
7352
7353static const struct rpc_call_ops nfs41_sequence_ops = {
7354 .rpc_call_done = nfs41_sequence_call_done,
7355 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7356 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7357};
7358
8fe72bac
TM		 7359static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7360 struct rpc_cred *cred,
7361 bool is_privileged)
fc01cea9 7362{
d5f8d3fe 7363 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7364 struct rpc_message msg = {
7365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7366 .rpc_cred = cred,
7367 };
71ac6da9
TM		 7368 struct rpc_task_setup task_setup_data = {
7369 .rpc_client = clp->cl_rpcclient,
7370 .rpc_message = &msg,
8fe72bac 7371 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7372 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7373 };
fc01cea9 7374
7135840f 7375 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7376 return ERR_PTR(-EIO);
dfb4f309 7377 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7378 if (calldata == NULL) {
7135840f 7379 nfs_put_client(clp);
71ac6da9 7380 return ERR_PTR(-ENOMEM);
fc01cea9 7381 }
a9c92d6b 7382 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7383 if (is_privileged)
7384 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7385 msg.rpc_argp = &calldata->args;
7386 msg.rpc_resp = &calldata->res;
7387 calldata->clp = clp;
71ac6da9 7388 task_setup_data.callback_data = calldata;
fc01cea9 7389
71ac6da9
TM		 7390 return rpc_run_task(&task_setup_data);
7391}
7392
2f60ea6b 7393static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7394{
7395 struct rpc_task *task;
7396 int ret = 0;
7397
2f60ea6b 7398 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7399 return -EAGAIN;
8fe72bac 7400 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7401 if (IS_ERR(task))
7402 ret = PTR_ERR(task);
7403 else
bf294b41 7404 rpc_put_task_async(task);
71ac6da9
TM		 7405 dprintk("<-- %s status=%d\n", __func__, ret);
7406 return ret;
7407}
7408
7409static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7410{
7411 struct rpc_task *task;
7412 int ret;
7413
8fe72bac 7414 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7415 if (IS_ERR(task)) {
7416 ret = PTR_ERR(task);
7417 goto out;
7418 }
7419 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7420 if (!ret) {
7421 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7422
7423 if (task->tk_status == 0)
7424 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7425 ret = task->tk_status;
b4410c2f 7426 }
71ac6da9
TM		 7427 rpc_put_task(task);
7428out:
7429 dprintk("<-- %s status=%d\n", __func__, ret);
7430 return ret;
fc01cea9
AA		 7431}
7432
fce5c838
RL		 7433struct nfs4_reclaim_complete_data {
7434 struct nfs_client *clp;
7435 struct nfs41_reclaim_complete_args arg;
7436 struct nfs41_reclaim_complete_res res;
7437};
7438
7439static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7440{
7441 struct nfs4_reclaim_complete_data *calldata = data;
7442
d9afbd1b
TM		 7443 nfs41_setup_sequence(calldata->clp->cl_session,
7444 &calldata->arg.seq_args,
7445 &calldata->res.seq_res,
7446 task);
fce5c838
RL		 7447}
7448
aa5190d0
TM		 7449static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7450{
7451 switch(task->tk_status) {
7452 case 0:
7453 case -NFS4ERR_COMPLETE_ALREADY:
7454 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7455 break;
7456 case -NFS4ERR_DELAY:
aa5190d0 7457 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7458 /* fall through */
7459 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7460 return -EAGAIN;
7461 default:
0400a6b0 7462 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7463 }
7464 return 0;
7465}
7466
fce5c838
RL		 7467static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7468{
7469 struct nfs4_reclaim_complete_data *calldata = data;
7470 struct nfs_client *clp = calldata->clp;
7471 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7472
7473 dprintk("--> %s\n", __func__);
14516c3a
TM		 7474 if (!nfs41_sequence_done(task, res))
7475 return;
fce5c838 7476
c6d01c6f 7477 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7478 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7479 rpc_restart_call_prepare(task);
7480 return;
7481 }
fce5c838
RL		 7482 dprintk("<-- %s\n", __func__);
7483}
7484
7485static void nfs4_free_reclaim_complete_data(void *data)
7486{
7487 struct nfs4_reclaim_complete_data *calldata = data;
7488
7489 kfree(calldata);
7490}
7491
7492static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7493 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7494 .rpc_call_done = nfs4_reclaim_complete_done,
7495 .rpc_release = nfs4_free_reclaim_complete_data,
7496};
7497
7498/*
7499 * Issue a global reclaim complete.
7500 */
965e9c23
TM		 7501static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7502 struct rpc_cred *cred)
fce5c838
RL		 7503{
7504 struct nfs4_reclaim_complete_data *calldata;
7505 struct rpc_task *task;
7506 struct rpc_message msg = {
7507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7508 .rpc_cred = cred,
fce5c838
RL		 7509 };
7510 struct rpc_task_setup task_setup_data = {
7511 .rpc_client = clp->cl_rpcclient,
7512 .rpc_message = &msg,
7513 .callback_ops = &nfs4_reclaim_complete_call_ops,
7514 .flags = RPC_TASK_ASYNC,
7515 };
7516 int status = -ENOMEM;
7517
7518 dprintk("--> %s\n", __func__);
8535b2be 7519 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7520 if (calldata == NULL)
7521 goto out;
7522 calldata->clp = clp;
7523 calldata->arg.one_fs = 0;
fce5c838 7524
a9c92d6b 7525 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7526 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7527 msg.rpc_argp = &calldata->arg;
7528 msg.rpc_resp = &calldata->res;
7529 task_setup_data.callback_data = calldata;
7530 task = rpc_run_task(&task_setup_data);
acf82b85 7531 if (IS_ERR(task)) {
fce5c838 7532 status = PTR_ERR(task);
acf82b85
DC		 7533 goto out;
7534 }
c34c32ea
AA		 7535 status = nfs4_wait_for_completion_rpc_task(task);
7536 if (status == 0)
7537 status = task->tk_status;
fce5c838 7538 rpc_put_task(task);
acf82b85 7539 return 0;
fce5c838
RL		 7540out:
7541 dprintk("<-- %s status=%d\n", __func__, status);
7542 return status;
7543}
b1f69b75
AA		 7544
7545static void
7546nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7547{
7548 struct nfs4_layoutget *lgp = calldata;
c31663d4 7549 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7550 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7551
7552 dprintk("--> %s\n", __func__);
c31663d4
FI		 7553 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7554 * right now covering the LAYOUTGET we are about to send.
7555 * However, that is not so catastrophic, and there seems
7556 * to be no way to prevent it completely.
7557 */
6ba7db34 7558 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7559 &lgp->res.seq_res, task))
b1f69b75 7560 return;
cf7d63f1
FI		 7561 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7562 NFS_I(lgp->args.inode)->layout,
7563 lgp->args.ctx->state)) {
7564 rpc_exit(task, NFS4_OK);
cf7d63f1 7565 }
b1f69b75
AA		 7566}
7567
7568static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7569{
7570 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7571 struct inode *inode = lgp->args.inode;
7572 struct nfs_server *server = NFS_SERVER(inode);
7573 struct pnfs_layout_hdr *lo;
7574 struct nfs4_state *state = NULL;
ed7e5423 7575 unsigned long timeo, now, giveup;
b1f69b75 7576
ed7e5423 7577 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7578
6ba7db34 7579 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7580 goto out;
b1f69b75
AA		 7581
7582 switch (task->tk_status) {
7583 case 0:
ee314c2a 7584 goto out;
ed7e5423
BH		 7585 /*
7586 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7587 * (or clients) writing to the same RAID stripe
7588 */
b1f69b75 7589 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7590 /*
7591 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7592 * existing layout before getting a new one).
7593 */
b1f69b75 7594 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7595 timeo = rpc_get_timeout(task->tk_client);
7596 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7597 now = jiffies;
7598 if (time_after(giveup, now)) {
7599 unsigned long delay;
7600
7601 /* Delay for:
7602 * - Not less then NFS4_POLL_RETRY_MIN.
7603 * - One last time a jiffie before we give up
7604 * - exponential backoff (time_now minus start_attempt)
7605 */
7606 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7607 min((giveup - now - 1),
7608 now - lgp->args.timestamp));
7609
7610 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7611 __func__, delay);
7612 rpc_delay(task, delay);
7613 task->tk_status = 0;
7614 rpc_restart_call_prepare(task);
7615 goto out; /* Do not call nfs4_async_handle_error() */
7616 }
ee314c2a
TM		 7617 break;
7618 case -NFS4ERR_EXPIRED:
7619 case -NFS4ERR_BAD_STATEID:
7620 spin_lock(&inode->i_lock);
7621 lo = NFS_I(inode)->layout;
7622 if (!lo || list_empty(&lo->plh_segs)) {
7623 spin_unlock(&inode->i_lock);
7624 /* If the open stateid was bad, then recover it. */
7625 state = lgp->args.ctx->state;
7626 } else {
7627 LIST_HEAD(head);
7628
defb8460
CH		 7629 /*
7630 * Mark the bad layout state as invalid, then retry
7631 * with the current stateid.
7632 */
ee314c2a
TM		 7633 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7634 spin_unlock(&inode->i_lock);
ee314c2a 7635 pnfs_free_lseg_list(&head);
defb8460
CH		 7636
7637 task->tk_status = 0;
7638 rpc_restart_call_prepare(task);
b1f69b75
AA		 7639 }
7640 }
8478eaa1 7641 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7642 rpc_restart_call_prepare(task);
7643out:
b1f69b75
AA		 7644 dprintk("<-- %s\n", __func__);
7645}
7646
8554116e
IK		 7647static size_t max_response_pages(struct nfs_server *server)
7648{
7649 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7650 return nfs_page_array_len(0, max_resp_sz);
7651}
7652
7653static void nfs4_free_pages(struct page **pages, size_t size)
7654{
7655 int i;
7656
7657 if (!pages)
7658 return;
7659
7660 for (i = 0; i < size; i++) {
7661 if (!pages[i])
7662 break;
7663 __free_page(pages[i]);
7664 }
7665 kfree(pages);
7666}
7667
7668static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7669{
7670 struct page **pages;
7671 int i;
7672
7673 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7674 if (!pages) {
7675 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7676 return NULL;
7677 }
7678
7679 for (i = 0; i < size; i++) {
7680 pages[i] = alloc_page(gfp_flags);
7681 if (!pages[i]) {
7682 dprintk("%s: failed to allocate page\n", __func__);
7683 nfs4_free_pages(pages, size);
7684 return NULL;
7685 }
7686 }
7687
7688 return pages;
7689}
7690
b1f69b75
AA		 7691static void nfs4_layoutget_release(void *calldata)
7692{
7693 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7694 struct inode *inode = lgp->args.inode;
7695 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7696 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7697
7698 dprintk("--> %s\n", __func__);
8554116e 7699 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7700 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7701 put_nfs_open_context(lgp->args.ctx);
7702 kfree(calldata);
7703 dprintk("<-- %s\n", __func__);
7704}
7705
7706static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7707 .rpc_call_prepare = nfs4_layoutget_prepare,
7708 .rpc_call_done = nfs4_layoutget_done,
7709 .rpc_release = nfs4_layoutget_release,
7710};
7711
a0b0a6e3
TM		 7712struct pnfs_layout_segment *
7713nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7714{
a47970ff
WAA		 7715 struct inode *inode = lgp->args.inode;
7716 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7717 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7718 struct rpc_task *task;
7719 struct rpc_message msg = {
7720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7721 .rpc_argp = &lgp->args,
7722 .rpc_resp = &lgp->res,
6ab59344 7723 .rpc_cred = lgp->cred,
b1f69b75
AA		 7724 };
7725 struct rpc_task_setup task_setup_data = {
7726 .rpc_client = server->client,
7727 .rpc_message = &msg,
7728 .callback_ops = &nfs4_layoutget_call_ops,
7729 .callback_data = lgp,
7730 .flags = RPC_TASK_ASYNC,
7731 };
a0b0a6e3 7732 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7733 int status = 0;
7734
7735 dprintk("--> %s\n", __func__);
7736
4bd5a980
PT		 7737 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7738 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7739
8554116e
IK		 7740 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7741 if (!lgp->args.layout.pages) {
7742 nfs4_layoutget_release(lgp);
a0b0a6e3 7743 return ERR_PTR(-ENOMEM);
8554116e
IK		 7744 }
7745 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7746 lgp->args.timestamp = jiffies;
8554116e 7747
35124a09 7748 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7749 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7750 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7751
b1f69b75
AA		 7752 task = rpc_run_task(&task_setup_data);
7753 if (IS_ERR(task))
a0b0a6e3 7754 return ERR_CAST(task);
b1f69b75 7755 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7756 if (status == 0)
7757 status = task->tk_status;
1037e6ea
TM		 7758 trace_nfs4_layoutget(lgp->args.ctx,
7759 &lgp->args.range,
7760 &lgp->res.range,
7761 status);
085b7a45
WAA		 7762 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7763 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7764 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7765 rpc_put_task(task);
7766 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7767 if (status)
7768 return ERR_PTR(status);
7769 return lseg;
b1f69b75
AA		 7770}
7771
cbe82603
BH		 7772static void
7773nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7774{
7775 struct nfs4_layoutreturn *lrp = calldata;
7776
7777 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7778 nfs41_setup_sequence(lrp->clp->cl_session,
7779 &lrp->args.seq_args,
7780 &lrp->res.seq_res,
7781 task);
cbe82603
BH		 7782}
7783
7784static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7785{
7786 struct nfs4_layoutreturn *lrp = calldata;
7787 struct nfs_server *server;
7788
7789 dprintk("--> %s\n", __func__);
7790
6ba7db34 7791 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7792 return;
7793
7794 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7795 switch (task->tk_status) {
7796 default:
7797 task->tk_status = 0;
7798 case 0:
7799 break;
7800 case -NFS4ERR_DELAY:
8478eaa1 7801 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7802 break;
d00c5d43 7803 rpc_restart_call_prepare(task);
cbe82603
BH		 7804 return;
7805 }
cbe82603
BH		 7806 dprintk("<-- %s\n", __func__);
7807}
7808
7809static void nfs4_layoutreturn_release(void *calldata)
7810{
7811 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7812 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7813
7814 dprintk("--> %s\n", __func__);
849b286f
TM		 7815 spin_lock(&lo->plh_inode->i_lock);
7816 if (lrp->res.lrs_present)
7817 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7818 lo->plh_block_lgets--;
7819 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7820 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7821 kfree(calldata);
7822 dprintk("<-- %s\n", __func__);
7823}
7824
7825static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7826 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7827 .rpc_call_done = nfs4_layoutreturn_done,
7828 .rpc_release = nfs4_layoutreturn_release,
7829};
7830
7831int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7832{
7833 struct rpc_task *task;
7834 struct rpc_message msg = {
7835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7836 .rpc_argp = &lrp->args,
7837 .rpc_resp = &lrp->res,
9556000d 7838 .rpc_cred = lrp->cred,
cbe82603
BH		 7839 };
7840 struct rpc_task_setup task_setup_data = {
1771c577 7841 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7842 .rpc_message = &msg,
7843 .callback_ops = &nfs4_layoutreturn_call_ops,
7844 .callback_data = lrp,
7845 };
7846 int status;
7847
7848 dprintk("--> %s\n", __func__);
a9c92d6b 7849 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7850 task = rpc_run_task(&task_setup_data);
7851 if (IS_ERR(task))
7852 return PTR_ERR(task);
7853 status = task->tk_status;
1037e6ea 7854 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7855 dprintk("<-- %s status=%d\n", __func__, status);
7856 rpc_put_task(task);
7857 return status;
7858}
7859
b1f69b75 7860static int
cd5875fe
TM		 7861_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7862 struct pnfs_device *pdev,
7863 struct rpc_cred *cred)
b1f69b75
AA		 7864{
7865 struct nfs4_getdeviceinfo_args args = {
7866 .pdev = pdev,
7867 };
7868 struct nfs4_getdeviceinfo_res res = {
7869 .pdev = pdev,
7870 };
7871 struct rpc_message msg = {
7872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7873 .rpc_argp = &args,
7874 .rpc_resp = &res,
cd5875fe 7875 .rpc_cred = cred,
b1f69b75
AA		 7876 };
7877 int status;
7878
7879 dprintk("--> %s\n", __func__);
7c513058 7880 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7881 dprintk("<-- %s status=%d\n", __func__, status);
7882
7883 return status;
7884}
7885
cd5875fe
TM		 7886int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7887 struct pnfs_device *pdev,
7888 struct rpc_cred *cred)
b1f69b75
AA		 7889{
7890 struct nfs4_exception exception = { };
7891 int err;
7892
7893 do {
7894 err = nfs4_handle_exception(server,
cd5875fe 7895 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7896 &exception);
7897 } while (exception.retry);
7898 return err;
7899}
7900EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7901
863a3c6c
AA		 7902static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7903{
7904 struct nfs4_layoutcommit_data *data = calldata;
7905 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7906 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7907
d9afbd1b
TM		 7908 nfs41_setup_sequence(session,
7909 &data->args.seq_args,
7910 &data->res.seq_res,
7911 task);
863a3c6c
AA		 7912}
7913
7914static void
7915nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7916{
7917 struct nfs4_layoutcommit_data *data = calldata;
7918 struct nfs_server *server = NFS_SERVER(data->args.inode);
7919
6ba7db34 7920 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7921 return;
7922
7923 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7924 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7925 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7926 case -NFS4ERR_BADLAYOUT: /* no layout */
7927 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7928 task->tk_status = 0;
e59d27e0 7929 case 0:
e59d27e0
TM		 7930 break;
7931 default:
8478eaa1 7932 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7933 rpc_restart_call_prepare(task);
7934 return;
7935 }
7936 }
863a3c6c
AA		 7937}
7938
7939static void nfs4_layoutcommit_release(void *calldata)
7940{
7941 struct nfs4_layoutcommit_data *data = calldata;
7942
db29c089 7943 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7944 nfs_post_op_update_inode_force_wcc(data->args.inode,
7945 data->res.fattr);
863a3c6c
AA		 7946 put_rpccred(data->cred);
7947 kfree(data);
7948}
7949
7950static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7951 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7952 .rpc_call_done = nfs4_layoutcommit_done,
7953 .rpc_release = nfs4_layoutcommit_release,
7954};
7955
7956int
ef311537 7957nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7958{
7959 struct rpc_message msg = {
7960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7961 .rpc_argp = &data->args,
7962 .rpc_resp = &data->res,
7963 .rpc_cred = data->cred,
7964 };
7965 struct rpc_task_setup task_setup_data = {
7966 .task = &data->task,
7967 .rpc_client = NFS_CLIENT(data->args.inode),
7968 .rpc_message = &msg,
7969 .callback_ops = &nfs4_layoutcommit_ops,
7970 .callback_data = data,
7971 .flags = RPC_TASK_ASYNC,
7972 };
7973 struct rpc_task *task;
7974 int status = 0;
7975
7976 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7977 "lbw: %llu inode %lu\n",
7978 data->task.tk_pid, sync,
7979 data->args.lastbytewritten,
7980 data->args.inode->i_ino);
7981
a9c92d6b 7982 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7983 task = rpc_run_task(&task_setup_data);
7984 if (IS_ERR(task))
7985 return PTR_ERR(task);
ef311537 7986 if (sync == false)
863a3c6c
AA		 7987 goto out;
7988 status = nfs4_wait_for_completion_rpc_task(task);
7989 if (status != 0)
7990 goto out;
7991 status = task->tk_status;
1037e6ea 7992 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7993out:
7994 dprintk("%s: status %d\n", __func__, status);
7995 rpc_put_task(task);
7996 return status;
7997}
fca78d6d 7998
97431204
AA		 7999/**
8000 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8001 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8002 */
fca78d6d
BS		 8003static int
8004_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8005 struct nfs_fsinfo *info,
8006 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8007{
8008 struct nfs41_secinfo_no_name_args args = {
8009 .style = SECINFO_STYLE_CURRENT_FH,
8010 };
8011 struct nfs4_secinfo_res res = {
8012 .flavors = flavors,
8013 };
8014 struct rpc_message msg = {
8015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8016 .rpc_argp = &args,
8017 .rpc_resp = &res,
8018 };
b1b3e136 8019 struct rpc_clnt *clnt = server->client;
7cb852df 8020 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8021 int status;
8022
8023 if (use_integrity) {
8024 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8025 cred = nfs4_get_clid_cred(server->nfs_client);
8026 msg.rpc_cred = cred;
b1b3e136
WAA		 8027 }
8028
8029 dprintk("--> %s\n", __func__);
8030 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8031 &res.seq_res, 0);
8032 dprintk("<-- %s status=%d\n", __func__, status);
8033
7cb852df
WAA		 8034 if (cred)
8035 put_rpccred(cred);
b1b3e136
WAA		 8036
8037 return status;
fca78d6d
BS		 8038}
8039
8040static int
8041nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8042 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8043{
8044 struct nfs4_exception exception = { };
8045 int err;
8046 do {
b1b3e136
WAA		 8047 /* first try using integrity protection */
8048 err = -NFS4ERR_WRONGSEC;
8049
8050 /* try to use integrity protection with machine cred */
8051 if (_nfs4_is_integrity_protected(server->nfs_client))
8052 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8053 flavors, true);
8054
8055 /*
8056 * if unable to use integrity protection, or SECINFO with
8057 * integrity protection returns NFS4ERR_WRONGSEC (which is
8058 * disallowed by spec, but exists in deployed servers) use
8059 * the current filesystem's rpc_client and the user cred.
8060 */
8061 if (err == -NFS4ERR_WRONGSEC)
8062 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8063 flavors, false);
8064
fca78d6d
BS		 8065 switch (err) {
8066 case 0:
8067 case -NFS4ERR_WRONGSEC:
78b19bae 8068 case -ENOTSUPP:
05e9cfb4 8069 goto out;
fca78d6d
BS		 8070 default:
8071 err = nfs4_handle_exception(server, err, &exception);
8072 }
8073 } while (exception.retry);
05e9cfb4 8074out:
fca78d6d
BS		 8075 return err;
8076}
8077
8078static int
8079nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8080 struct nfs_fsinfo *info)
8081{
8082 int err;
8083 struct page *page;
367156d9 8084 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8085 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8086 struct nfs4_secinfo4 *secinfo;
8087 int i;
fca78d6d
BS		 8088
8089 page = alloc_page(GFP_KERNEL);
8090 if (!page) {
8091 err = -ENOMEM;
8092 goto out;
8093 }
8094
8095 flavors = page_address(page);
8096 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8097
8098 /*
8099 * Fall back on "guess and check" method if
8100 * the server doesn't support SECINFO_NO_NAME
8101 */
78b19bae 8102 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8103 err = nfs4_find_root_sec(server, fhandle, info);
8104 goto out_freepage;
8105 }
8106 if (err)
8107 goto out_freepage;
8108
58a8cf12
WAA		 8109 for (i = 0; i < flavors->num_flavors; i++) {
8110 secinfo = &flavors->flavors[i];
8111
8112 switch (secinfo->flavor) {
8113 case RPC_AUTH_NULL:
8114 case RPC_AUTH_UNIX:
8115 case RPC_AUTH_GSS:
8116 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8117 &secinfo->flavor_info);
8118 break;
8119 default:
8120 flavor = RPC_AUTH_MAXFLAVOR;
8121 break;
8122 }
8123
4d4b69dd
WAA		 8124 if (!nfs_auth_info_match(&server->auth_info, flavor))
8125 flavor = RPC_AUTH_MAXFLAVOR;
8126
58a8cf12
WAA		 8127 if (flavor != RPC_AUTH_MAXFLAVOR) {
8128 err = nfs4_lookup_root_sec(server, fhandle,
8129 info, flavor);
8130 if (!err)
8131 break;
8132 }
8133 }
8134
8135 if (flavor == RPC_AUTH_MAXFLAVOR)
8136 err = -EPERM;
fca78d6d
BS		 8137
8138out_freepage:
8139 put_page(page);
8140 if (err == -EACCES)
8141 return -EPERM;
8142out:
8143 return err;
8144}
1cab0652 8145
ab7cb0df
TM		 8146static int _nfs41_test_stateid(struct nfs_server *server,
8147 nfs4_stateid *stateid,
8148 struct rpc_cred *cred)
7d974794
BS		 8149{
8150 int status;
8151 struct nfs41_test_stateid_args args = {
1cab0652 8152 .stateid = stateid,
7d974794
BS		 8153 };
8154 struct nfs41_test_stateid_res res;
8155 struct rpc_message msg = {
8156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8157 .rpc_argp = &args,
8158 .rpc_resp = &res,
ab7cb0df 8159 .rpc_cred = cred,
7d974794 8160 };
3787d506
WAA		 8161 struct rpc_clnt *rpc_client = server->client;
8162
8163 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8164 &rpc_client, &msg);
1cab0652 8165
38527b15 8166 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8167 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8168 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8169 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8170 &args.seq_args, &res.seq_res);
38527b15
CL		 8171 if (status != NFS_OK) {
8172 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8173 return status;
38527b15
CL		 8174 }
8175 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8176 return -res.status;
7d974794
BS		 8177}
8178
38527b15
CL		 8179/**
8180 * nfs41_test_stateid - perform a TEST_STATEID operation
8181 *
8182 * @server: server / transport on which to perform the operation
8183 * @stateid: state ID to test
ab7cb0df 8184 * @cred: credential
38527b15
CL		 8185 *
8186 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8187 * Otherwise a negative NFS4ERR value is returned if the operation
8188 * failed or the state ID is not currently valid.
8189 */
ab7cb0df
TM		 8190static int nfs41_test_stateid(struct nfs_server *server,
8191 nfs4_stateid *stateid,
8192 struct rpc_cred *cred)
7d974794
BS		 8193{
8194 struct nfs4_exception exception = { };
8195 int err;
8196 do {
ab7cb0df 8197 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8198 if (err != -NFS4ERR_DELAY)
8199 break;
8200 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8201 } while (exception.retry);
8202 return err;
8203}
9aeda35f 8204
7c1d5fae
TM		 8205struct nfs_free_stateid_data {
8206 struct nfs_server *server;
8207 struct nfs41_free_stateid_args args;
9aeda35f 8208 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8209};
8210
8211static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8212{
8213 struct nfs_free_stateid_data *data = calldata;
8214 nfs41_setup_sequence(nfs4_get_session(data->server),
8215 &data->args.seq_args,
8216 &data->res.seq_res,
8217 task);
8218}
8219
8220static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8221{
8222 struct nfs_free_stateid_data *data = calldata;
8223
8224 nfs41_sequence_done(task, &data->res.seq_res);
8225
8226 switch (task->tk_status) {
8227 case -NFS4ERR_DELAY:
8478eaa1 8228 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8229 rpc_restart_call_prepare(task);
8230 }
8231}
8232
8233static void nfs41_free_stateid_release(void *calldata)
8234{
8235 kfree(calldata);
8236}
8237
17f26b12 8238static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8239 .rpc_call_prepare = nfs41_free_stateid_prepare,
8240 .rpc_call_done = nfs41_free_stateid_done,
8241 .rpc_release = nfs41_free_stateid_release,
8242};
8243
8244static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8245 nfs4_stateid *stateid,
ab7cb0df 8246 struct rpc_cred *cred,
7c1d5fae
TM		 8247 bool privileged)
8248{
9aeda35f
BS		 8249 struct rpc_message msg = {
8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8251 .rpc_cred = cred,
9aeda35f 8252 };
7c1d5fae
TM		 8253 struct rpc_task_setup task_setup = {
8254 .rpc_client = server->client,
8255 .rpc_message = &msg,
8256 .callback_ops = &nfs41_free_stateid_ops,
8257 .flags = RPC_TASK_ASYNC,
8258 };
8259 struct nfs_free_stateid_data *data;
9aeda35f 8260
3787d506
WAA		 8261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8262 &task_setup.rpc_client, &msg);
8263
38527b15 8264 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8265 data = kmalloc(sizeof(*data), GFP_NOFS);
8266 if (!data)
8267 return ERR_PTR(-ENOMEM);
8268 data->server = server;
8269 nfs4_stateid_copy(&data->args.stateid, stateid);
8270
8271 task_setup.callback_data = data;
8272
8273 msg.rpc_argp = &data->args;
8274 msg.rpc_resp = &data->res;
a9c92d6b 8275 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8276 if (privileged)
8277 nfs4_set_sequence_privileged(&data->args.seq_args);
8278
8279 return rpc_run_task(&task_setup);
9aeda35f
BS		 8280}
8281
38527b15
CL		 8282/**
8283 * nfs41_free_stateid - perform a FREE_STATEID operation
8284 *
8285 * @server: server / transport on which to perform the operation
8286 * @stateid: state ID to release
ab7cb0df 8287 * @cred: credential
38527b15
CL		 8288 *
8289 * Returns NFS_OK if the server freed "stateid". Otherwise a
8290 * negative NFS4ERR value is returned.
8291 */
ab7cb0df
TM		 8292static int nfs41_free_stateid(struct nfs_server *server,
8293 nfs4_stateid *stateid,
8294 struct rpc_cred *cred)
9aeda35f 8295{
7c1d5fae
TM		 8296 struct rpc_task *task;
8297 int ret;
8298
ab7cb0df 8299 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8300 if (IS_ERR(task))
8301 return PTR_ERR(task);
8302 ret = rpc_wait_for_completion_task(task);
8303 if (!ret)
8304 ret = task->tk_status;
8305 rpc_put_task(task);
8306 return ret;
9aeda35f 8307}
36281caa 8308
f1cdae87
JL		 8309static void
8310nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8311{
8312 struct rpc_task *task;
ab7cb0df 8313 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8314
ab7cb0df 8315 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8316 nfs4_free_lock_state(server, lsp);
8317 if (IS_ERR(task))
f1cdae87 8318 return;
c8b2d0bf 8319 rpc_put_task(task);
c8b2d0bf
TM		 8320}
8321
36281caa
TM		 8322static bool nfs41_match_stateid(const nfs4_stateid *s1,
8323 const nfs4_stateid *s2)
8324{
2d2f24ad 8325 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8326 return false;
8327
2d2f24ad 8328 if (s1->seqid == s2->seqid)
36281caa 8329 return true;
2d2f24ad 8330 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8331 return true;
8332
8333 return false;
8334}
8335
557134a3
AA		 8336#endif /* CONFIG_NFS_V4_1 */
8337
36281caa
TM		 8338static bool nfs4_match_stateid(const nfs4_stateid *s1,
8339 const nfs4_stateid *s2)
8340{
f597c537 8341 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8342}
8343
8344
17280175 8345static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8346 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8347 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8348 .recover_open = nfs4_open_reclaim,
8349 .recover_lock = nfs4_lock_reclaim,
591d71cb 8350 .establish_clid = nfs4_init_clientid,
05f4c350 8351 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8352};
8353
591d71cb 8354#if defined(CONFIG_NFS_V4_1)
17280175 8355static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8356 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8357 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8358 .recover_open = nfs4_open_reclaim,
8359 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8360 .establish_clid = nfs41_init_clientid,
fce5c838 8361 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8362 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8363};
8364#endif /* CONFIG_NFS_V4_1 */
8365
17280175 8366static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8367 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8368 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8369 .recover_open = nfs40_open_expired,
591d71cb
AA		 8370 .recover_lock = nfs4_lock_expired,
8371 .establish_clid = nfs4_init_clientid,
8372};
8373
8374#if defined(CONFIG_NFS_V4_1)
17280175 8375static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8376 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8377 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8378 .recover_open = nfs41_open_expired,
8379 .recover_lock = nfs41_lock_expired,
4d643d1d 8380 .establish_clid = nfs41_init_clientid,
1da177e4 8381};
591d71cb 8382#endif /* CONFIG_NFS_V4_1 */
1da177e4 8383
17280175 8384static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8385 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8386 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8387 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8388};
8389
8390#if defined(CONFIG_NFS_V4_1)
17280175 8391static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8392 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8393 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8394 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8395};
8396#endif
8397
ec011fe8 8398static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8399 .get_locations = _nfs40_proc_get_locations,
44c99933 8400 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8401};
8402
8403#if defined(CONFIG_NFS_V4_1)
8404static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8405 .get_locations = _nfs41_proc_get_locations,
44c99933 8406 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8407};
8408#endif /* CONFIG_NFS_V4_1 */
8409
97dc1359
TM		 8410static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8411 .minor_version = 0,
39c6daae
TM		 8412 .init_caps = NFS_CAP_READDIRPLUS
8413 | NFS_CAP_ATOMIC_OPEN
8414 | NFS_CAP_CHANGE_ATTR
8415 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8416 .init_client = nfs40_init_client,
8417 .shutdown_client = nfs40_shutdown_client,
36281caa 8418 .match_stateid = nfs4_match_stateid,
fca78d6d 8419 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8420 .free_lock_state = nfs4_release_lockowner,
63f5f796 8421 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8422 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8423 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8424 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8425 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8426 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8427};
8428
8429#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8430static struct nfs_seqid *
8431nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8432{
8433 return NULL;
8434}
8435
97dc1359
TM		 8436static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8437 .minor_version = 1,
39c6daae
TM		 8438 .init_caps = NFS_CAP_READDIRPLUS
8439 | NFS_CAP_ATOMIC_OPEN
8440 | NFS_CAP_CHANGE_ATTR
3b66486c 8441 | NFS_CAP_POSIX_LOCK
49f9a0fa 8442 | NFS_CAP_STATEID_NFSV41
e983120e 8443 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8444 .init_client = nfs41_init_client,
8445 .shutdown_client = nfs41_shutdown_client,
36281caa 8446 .match_stateid = nfs41_match_stateid,
fca78d6d 8447 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8448 .free_lock_state = nfs41_free_lock_state,
63f5f796 8449 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8450 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8451 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8452 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8453 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8454 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8455};
8456#endif
8457
42c2c424
SD		 8458#if defined(CONFIG_NFS_V4_2)
8459static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8460 .minor_version = 2,
7017310a
BS		 8461 .init_caps = NFS_CAP_READDIRPLUS
8462 | NFS_CAP_ATOMIC_OPEN
8463 | NFS_CAP_CHANGE_ATTR
8464 | NFS_CAP_POSIX_LOCK
8465 | NFS_CAP_STATEID_NFSV41
e983120e 8466 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8467 | NFS_CAP_ALLOCATE
624bd5b7 8468 | NFS_CAP_DEALLOCATE
e983120e 8469 | NFS_CAP_SEEK,
abf79bb3
CL		 8470 .init_client = nfs41_init_client,
8471 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8472 .match_stateid = nfs41_match_stateid,
8473 .find_root_sec = nfs41_find_root_sec,
7017310a 8474 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8475 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8476 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8477 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8478 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8479 .state_renewal_ops = &nfs41_state_renewal_ops,
8480};
8481#endif
8482
97dc1359
TM		 8483const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8484 [0] = &nfs_v4_0_minor_ops,
8485#if defined(CONFIG_NFS_V4_1)
8486 [1] = &nfs_v4_1_minor_ops,
8487#endif
42c2c424
SD		 8488#if defined(CONFIG_NFS_V4_2)
8489 [2] = &nfs_v4_2_minor_ops,
8490#endif
97dc1359
TM		 8491};
8492
17f26b12 8493static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8494 .create = nfs_create,
8495 .lookup = nfs_lookup,
8496 .atomic_open = nfs_atomic_open,
8497 .link = nfs_link,
8498 .unlink = nfs_unlink,
8499 .symlink = nfs_symlink,
8500 .mkdir = nfs_mkdir,
8501 .rmdir = nfs_rmdir,
8502 .mknod = nfs_mknod,
8503 .rename = nfs_rename,
8504 .permission = nfs_permission,
8505 .getattr = nfs_getattr,
8506 .setattr = nfs_setattr,
8507 .getxattr = generic_getxattr,
8508 .setxattr = generic_setxattr,
8509 .listxattr = generic_listxattr,
8510 .removexattr = generic_removexattr,
8511};
8512
92e1d5be 8513static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8514 .permission = nfs_permission,
8515 .getattr = nfs_getattr,
8516 .setattr = nfs_setattr,
64c2ce8b
AK		 8517 .getxattr = generic_getxattr,
8518 .setxattr = generic_setxattr,
8519 .listxattr = generic_listxattr,
8520 .removexattr = generic_removexattr,
6b3b5496
BF		 8521};
8522
509de811 8523const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8524 .version = 4, /* protocol version */
8525 .dentry_ops = &nfs4_dentry_operations,
8526 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8527 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8528 .file_ops = &nfs4_file_operations,
1da177e4 8529 .getroot = nfs4_proc_get_root,
281cad46 8530 .submount = nfs4_submount,
ff9099f2 8531 .try_mount = nfs4_try_mount,
1da177e4
LT		 8532 .getattr = nfs4_proc_getattr,
8533 .setattr = nfs4_proc_setattr,
8534 .lookup = nfs4_proc_lookup,
8535 .access = nfs4_proc_access,
8536 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8537 .create = nfs4_proc_create,
8538 .remove = nfs4_proc_remove,
8539 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8540 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8541 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8542 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8543 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8544 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8545 .link = nfs4_proc_link,
8546 .symlink = nfs4_proc_symlink,
8547 .mkdir = nfs4_proc_mkdir,
8548 .rmdir = nfs4_proc_remove,
8549 .readdir = nfs4_proc_readdir,
8550 .mknod = nfs4_proc_mknod,
8551 .statfs = nfs4_proc_statfs,
8552 .fsinfo = nfs4_proc_fsinfo,
8553 .pathconf = nfs4_proc_pathconf,
e9326dca 8554 .set_capabilities = nfs4_server_capabilities,
1da177e4 8555 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8556 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8557 .read_setup = nfs4_proc_read_setup,
ec06c096 8558 .read_done = nfs4_read_done,
1da177e4 8559 .write_setup = nfs4_proc_write_setup,
788e7a89 8560 .write_done = nfs4_write_done,
1da177e4 8561 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8562 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8563 .commit_done = nfs4_commit_done,
1da177e4 8564 .lock = nfs4_proc_lock,
e50a1c2e 8565 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8566 .close_context = nfs4_close_context,
2b484297 8567 .open_context = nfs4_atomic_open,
011e2a7f 8568 .have_delegation = nfs4_have_delegation,
57ec14c5 8569 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8570 .alloc_client = nfs4_alloc_client,
45a52a02 8571 .init_client = nfs4_init_client,
cdb7eced 8572 .free_client = nfs4_free_client,
1179acc6
BS		 8573 .create_server = nfs4_create_server,
8574 .clone_server = nfs_clone_server,
1da177e4
LT		 8575};
8576
64c2ce8b
AK		 8577static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8578 .prefix = XATTR_NAME_NFSV4_ACL,
8579 .list = nfs4_xattr_list_nfs4_acl,
8580 .get = nfs4_xattr_get_nfs4_acl,
8581 .set = nfs4_xattr_set_nfs4_acl,
8582};
8583
8584const struct xattr_handler *nfs4_xattr_handlers[] = {
8585 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8586#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8587 &nfs4_xattr_nfs4_label_handler,
8588#endif
64c2ce8b
AK		 8589 NULL
8590};
8591
1da177e4
LT		 8592/*
8593 * Local variables:
8594 * c-basic-offset: 8
8595 * End:
8596 */
Linux 6.x block layer and io_uring tree(s)