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NFSv4: Update list of irrecoverable errors on DELEGRETURN
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
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;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
542 if (!RPC_WAS_SENT(task))
543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
dfb4f309 564 if (!res->sr_slot) {
13615871
AA		 565 /* just wake up the next guy waiting since
566 * we may have not consumed a slot after all */
691daf3b 567 dprintk("%s: No slot\n", __func__);
35dc1d74 568 return;
13615871 569 }
e3725ec0
TM		 570 tbl = res->sr_slot->table;
571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
b75ad4cd
TM		 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
f4af6e2a 584 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
14516c3a 595static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
933602e3 598 struct nfs4_slot *slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
933602e3 607 slot = res->sr_slot;
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c
AA		 694}
695
14516c3a
TM		 696static int nfs4_sequence_done(struct rpc_task *task,
697 struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455
TM		 704}
705
dc70d7b3 706int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 707 struct nfs4_sequence_args *args,
708 struct nfs4_sequence_res *res,
ce5039c1
AA		 709 struct rpc_task *task)
710{
fbcd4abc
AA		 711 struct nfs4_slot *slot;
712 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 713
714 dprintk("--> %s\n", __func__);
ce5039c1 715 /* slot already allocated? */
dfb4f309 716 if (res->sr_slot != NULL)
d9afbd1b 717 goto out_success;
ce5039c1 718
fbcd4abc
AA		 719 tbl = &session->fc_slot_table;
720
69d206b5
TM		 721 task->tk_timeout = 0;
722
fbcd4abc 723 spin_lock(&tbl->slot_tbl_lock);
774d5f14 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 725 !args->sa_privileged) {
0b1c8fc4 726 /* The state manager will wait until the slot table is empty */
0b1c8fc4 727 dprintk("%s session is draining\n", __func__);
7b939a3f 728 goto out_sleep;
689cf5c1
AB		 729 }
730
2dc03b7f 731 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 732 if (IS_ERR(slot)) {
733 /* If out of memory, try again in 1/4 second */
734 if (slot == ERR_PTR(-ENOMEM))
735 task->tk_timeout = HZ >> 2;
fbcd4abc 736 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 737 goto out_sleep;
fbcd4abc
AA		 738 }
739 spin_unlock(&tbl->slot_tbl_lock);
740
2b2fa717 741 args->sa_slot = slot;
fbcd4abc 742
e8d92382 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 744 slot->slot_nr, slot->seq_nr);
fbcd4abc 745
dfb4f309 746 res->sr_slot = slot;
8e63b6a8 747 res->sr_timestamp = jiffies;
2a6e26cd 748 res->sr_status_flags = 0;
fbcd4abc
AA		 749 /*
750 * sr_status is only set in decode_sequence, and so will remain
751 * set to 1 if an rpc level failure occurs.
752 */
753 res->sr_status = 1;
2f92ae34 754 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 755out_success:
756 rpc_call_start(task);
ce5039c1 757 return 0;
7b939a3f 758out_sleep:
8fe72bac
TM		 759 /* Privileged tasks are queued with top priority */
760 if (args->sa_privileged)
1e1093c7
TM		 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
762 NULL, RPC_PRIORITY_PRIVILEGED);
763 else
764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 765 spin_unlock(&tbl->slot_tbl_lock);
766 return -EAGAIN;
ce5039c1 767}
dc70d7b3 768EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 769
5a580e0a
CL		 770static int nfs4_setup_sequence(const struct nfs_server *server,
771 struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res,
773 struct rpc_task *task)
ce5039c1 774{
035168ab 775 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 776 int ret = 0;
777
3bd2384a
CL		 778 if (!session)
779 return nfs40_setup_sequence(server, args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
3bd2384a 820 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 821}
822
823static int nfs4_sequence_done(struct rpc_task *task,
824 struct nfs4_sequence_res *res)
825{
3bd2384a 826 return nfs40_sequence_done(task, res);
9915ea7e 827}
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
fd0c0953 880static
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1073 kfree(p);
1074}
1075
1076static void nfs4_opendata_put(struct nfs4_opendata *p)
1077{
1078 if (p != NULL)
1079 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1080}
1081
06f814a3
TM		 1082static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1083{
06f814a3
TM		 1084 int ret;
1085
06f814a3 1086 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1087 return ret;
1088}
1089
dc0b027d 1090static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1091{
1092 int ret = 0;
dc0b027d 1093
536e43d1 1094 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1095 goto out;
1096 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1097 case FMODE_READ:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1099 && state->n_rdonly != 0;
6ee41268
TM		 1100 break;
1101 case FMODE_WRITE:
88069f77
TM		 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1103 && state->n_wronly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1107 && state->n_rdwr != 0;
6ee41268 1108 }
dc0b027d 1109out:
6ee41268
TM		 1110 return ret;
1111}
1112
dc0b027d 1113static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1114{
652f89f6
TM		 1115 if (delegation == NULL)
1116 return 0;
dc0b027d 1117 if ((delegation->type & fmode) != fmode)
aac00a8d 1118 return 0;
15c831bf 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1120 return 0;
d25be546
TM		 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 return 0;
b7391f44 1123 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1124 return 1;
1125}
1126
dc0b027d 1127static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1128{
dc0b027d 1129 switch (fmode) {
e7616923
TM		 1130 case FMODE_WRITE:
1131 state->n_wronly++;
1132 break;
1133 case FMODE_READ:
1134 state->n_rdonly++;
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 state->n_rdwr++;
1138 }
dc0b027d 1139 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1140}
1141
dc0b027d 1142static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1143{
1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1145 nfs4_stateid_copy(&state->stateid, stateid);
1146 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1147 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1148 switch (fmode) {
003707c7
TM		 1149 case FMODE_READ:
1150 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 break;
1152 case FMODE_WRITE:
1153 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 set_bit(NFS_O_RDWR_STATE, &state->flags);
1157 }
e7616923
TM		 1158}
1159
dc0b027d 1160static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1161{
8bda4e4c 1162 write_seqlock(&state->seqlock);
dc0b027d 1163 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1164 write_sequnlock(&state->seqlock);
003707c7
TM		 1165}
1166
dc0b027d 1167static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1168{
8bda4e4c
TM		 1169 /*
1170 * Protect the call to nfs4_state_set_mode_locked and
1171 * serialise the stateid update
1172 */
1173 write_seqlock(&state->seqlock);
003707c7 1174 if (deleg_stateid != NULL) {
f597c537 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1176 set_bit(NFS_DELEGATED_STATE, &state->flags);
1177 }
1178 if (open_stateid != NULL)
dc0b027d 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1180 write_sequnlock(&state->seqlock);
1181 spin_lock(&state->owner->so_lock);
dc0b027d 1182 update_open_stateflags(state, fmode);
ec073428 1183 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1184}
1185
dc0b027d 1186static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_delegation *deleg_cur;
1190 int ret = 0;
1191
dc0b027d 1192 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1193
1194 rcu_read_lock();
1195 deleg_cur = rcu_dereference(nfsi->delegation);
1196 if (deleg_cur == NULL)
1197 goto no_delegation;
1198
1199 spin_lock(&deleg_cur->lock);
17f26b12 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1202 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1203 goto no_delegation_unlock;
1204
1205 if (delegation == NULL)
1206 delegation = &deleg_cur->stateid;
f597c537 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1208 goto no_delegation_unlock;
1209
b7391f44 1210 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1212 ret = 1;
1213no_delegation_unlock:
1214 spin_unlock(&deleg_cur->lock);
1215no_delegation:
1216 rcu_read_unlock();
1217
1218 if (!ret && open_stateid != NULL) {
dc0b027d 1219 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1220 ret = 1;
1221 }
1222
1223 return ret;
1224}
1225
1226
dc0b027d 1227static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1228{
1229 struct nfs_delegation *delegation;
1230
1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1234 rcu_read_unlock();
1235 return;
1236 }
1237 rcu_read_unlock();
57ec14c5 1238 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1239}
1240
6ee41268 1241static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1242{
1243 struct nfs4_state *state = opendata->state;
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *delegation;
f448badd 1246 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1247 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1248 nfs4_stateid stateid;
1249 int ret = -EAGAIN;
1250
aac00a8d 1251 for (;;) {
dc0b027d 1252 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1253 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1254 if (can_open_cached(state, fmode, open_mode)) {
1255 update_open_stateflags(state, fmode);
6ee41268 1256 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1257 goto out_return_state;
1258 }
1259 spin_unlock(&state->owner->so_lock);
1260 }
34310430
TM		 1261 rcu_read_lock();
1262 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1263 if (!can_open_delegated(delegation, fmode)) {
34310430 1264 rcu_read_unlock();
aac00a8d 1265 break;
34310430 1266 }
aac00a8d 1267 /* Save the delegation */
f597c537 1268 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1269 rcu_read_unlock();
fa332941 1270 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1271 if (!opendata->is_recover) {
1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1273 if (ret != 0)
1274 goto out;
1275 }
aac00a8d 1276 ret = -EAGAIN;
34310430
TM		 1277
1278 /* Try to update the stateid using the delegation */
dc0b027d 1279 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1280 goto out_return_state;
aac00a8d 1281 }
aac00a8d
TM		 1282out:
1283 return ERR_PTR(ret);
1284out_return_state:
1285 atomic_inc(&state->count);
1286 return state;
1287}
1288
e23008ec
AA		 1289static void
1290nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1291{
1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1293 struct nfs_delegation *delegation;
1294 int delegation_flags = 0;
1295
1296 rcu_read_lock();
1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1298 if (delegation)
1299 delegation_flags = delegation->flags;
1300 rcu_read_unlock();
1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1303 "returning a delegation for "
1304 "OPEN(CLAIM_DELEGATE_CUR)\n",
1305 clp->cl_hostname);
1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1307 nfs_inode_set_delegation(state->inode,
1308 data->owner->so_cred,
1309 &data->o_res);
1310 else
1311 nfs_inode_reclaim_delegation(state->inode,
1312 data->owner->so_cred,
1313 &data->o_res);
1314}
1315
1316/*
1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1318 * and update the nfs4_state.
1319 */
1320static struct nfs4_state *
1321_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1322{
1323 struct inode *inode = data->state->inode;
1324 struct nfs4_state *state = data->state;
1325 int ret;
1326
d2bfda2e
WAA		 1327 if (!data->rpc_done) {
1328 if (data->rpc_status) {
1329 ret = data->rpc_status;
1330 goto err;
1331 }
1332 /* cached opens have already been processed */
1333 goto update;
e23008ec
AA		 1334 }
1335
e23008ec
AA		 1336 ret = nfs_refresh_inode(inode, &data->f_attr);
1337 if (ret)
1338 goto err;
1339
1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1342update:
e23008ec
AA		 1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
d49f042a 1345 atomic_inc(&state->count);
e23008ec
AA		 1346
1347 return state;
1348err:
1349 return ERR_PTR(ret);
1350
1351}
1352
1353static struct nfs4_state *
1354_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1355{
1356 struct inode *inode;
1357 struct nfs4_state *state = NULL;
1b370bc2 1358 int ret;
24ac23ab 1359
aac00a8d 1360 if (!data->rpc_done) {
6ee41268 1361 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1362 goto out;
1363 }
1364
1b370bc2 1365 ret = -EAGAIN;
24ac23ab 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1367 goto err;
1775fd3e 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1369 ret = PTR_ERR(inode);
03f28e3a 1370 if (IS_ERR(inode))
1b370bc2
TM		 1371 goto err;
1372 ret = -ENOMEM;
24ac23ab
TM		 1373 state = nfs4_get_open_state(inode, data->owner);
1374 if (state == NULL)
1b370bc2 1375 goto err_put_inode;
e23008ec
AA		 1376 if (data->o_res.delegation_type != 0)
1377 nfs4_opendata_check_deleg(data, state);
34310430 1378 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1379 data->o_arg.fmode);
24ac23ab 1380 iput(inode);
aac00a8d 1381out:
7aa262b5 1382 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1383 return state;
1b370bc2
TM		 1384err_put_inode:
1385 iput(inode);
1386err:
1387 return ERR_PTR(ret);
24ac23ab
TM		 1388}
1389
e23008ec
AA		 1390static struct nfs4_state *
1391nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1394 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1395 return _nfs4_opendata_to_nfs4_state(data);
1396}
1397
864472e9
TM		 1398static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1399{
1400 struct nfs_inode *nfsi = NFS_I(state->inode);
1401 struct nfs_open_context *ctx;
1402
1403 spin_lock(&state->inode->i_lock);
1404 list_for_each_entry(ctx, &nfsi->open_files, list) {
1405 if (ctx->state != state)
1406 continue;
1407 get_nfs_open_context(ctx);
1408 spin_unlock(&state->inode->i_lock);
1409 return ctx;
1410 }
1411 spin_unlock(&state->inode->i_lock);
1412 return ERR_PTR(-ENOENT);
1413}
1414
4a1c0893
TM		 1415static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1416 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1417{
1418 struct nfs4_opendata *opendata;
1419
4a1c0893 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1421 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1422 if (opendata == NULL)
1423 return ERR_PTR(-ENOMEM);
1424 opendata->state = state;
1425 atomic_inc(&state->count);
1426 return opendata;
1427}
1428
dc0b027d 1429static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1430{
2ced46c2 1431 struct nfs4_state *newstate;
864472e9
TM		 1432 int ret;
1433
dc0b027d
TM		 1434 opendata->o_arg.open_flags = 0;
1435 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1438 nfs4_init_opendata_res(opendata);
b257957e 1439 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1440 if (ret != 0)
1441 return ret;
2ced46c2 1442 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1443 if (IS_ERR(newstate))
1444 return PTR_ERR(newstate);
643168c2 1445 nfs4_close_state(newstate, fmode);
2ced46c2 1446 *res = newstate;
864472e9
TM		 1447 return 0;
1448}
1449
1450static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1451{
864472e9 1452 struct nfs4_state *newstate;
864472e9
TM		 1453 int ret;
1454
1455 /* memory barrier prior to reading state->n_* */
2ced46c2 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1457 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1458 smp_rmb();
1459 if (state->n_rdwr != 0) {
b0ed9dbc 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1462 if (ret != 0)
1463 return ret;
2ced46c2
TM		 1464 if (newstate != state)
1465 return -ESTALE;
864472e9
TM		 1466 }
1467 if (state->n_wronly != 0) {
b0ed9dbc 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1470 if (ret != 0)
1471 return ret;
2ced46c2
TM		 1472 if (newstate != state)
1473 return -ESTALE;
864472e9
TM		 1474 }
1475 if (state->n_rdonly != 0) {
b0ed9dbc 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1478 if (ret != 0)
1479 return ret;
2ced46c2
TM		 1480 if (newstate != state)
1481 return -ESTALE;
864472e9 1482 }
1ac7e2fd
TM		 1483 /*
1484 * We may have performed cached opens for all three recoveries.
1485 * Check if we need to update the current stateid.
1486 */
1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1489 write_seqlock(&state->seqlock);
1ac7e2fd 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1492 write_sequnlock(&state->seqlock);
1ac7e2fd 1493 }
864472e9
TM		 1494 return 0;
1495}
1496
1da177e4
LT		 1497/*
1498 * OPEN_RECLAIM:
1499 * reclaim state on the server after a reboot.
1da177e4 1500 */
539cd03a 1501static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1502{
1ac7e2fd 1503 struct nfs_delegation *delegation;
864472e9 1504 struct nfs4_opendata *opendata;
dc0b027d 1505 fmode_t delegation_type = 0;
1da177e4
LT		 1506 int status;
1507
4a1c0893
TM		 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1509 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1510 if (IS_ERR(opendata))
1511 return PTR_ERR(opendata);
1ac7e2fd
TM		 1512 rcu_read_lock();
1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1515 delegation_type = delegation->type;
1ac7e2fd 1516 rcu_read_unlock();
864472e9
TM		 1517 opendata->o_arg.u.delegation_type = delegation_type;
1518 status = nfs4_open_recover(opendata, state);
c6d00e63 1519 nfs4_opendata_put(opendata);
1da177e4
LT		 1520 return status;
1521}
1522
539cd03a 1523static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1524{
1525 struct nfs_server *server = NFS_SERVER(state->inode);
1526 struct nfs4_exception exception = { };
1527 int err;
1528 do {
539cd03a 1529 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1530 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1532 continue;
168667c4 1533 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1534 break;
1535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1536 } while (exception.retry);
1537 return err;
1538}
1539
864472e9
TM		 1540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1541{
1542 struct nfs_open_context *ctx;
1543 int ret;
1544
1545 ctx = nfs4_state_find_open_context(state);
1546 if (IS_ERR(ctx))
91876b13 1547 return -EAGAIN;
539cd03a 1548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1549 put_nfs_open_context(ctx);
1550 return ret;
1551}
1552
db4f2e63 1553static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1554{
be76b5b6
TM		 1555 switch (err) {
1556 default:
1557 printk(KERN_ERR "NFS: %s: unhandled error "
1558 "%d.\n", __func__, err);
1559 case 0:
1560 case -ENOENT:
1561 case -ESTALE:
1562 break;
1563 case -NFS4ERR_BADSESSION:
1564 case -NFS4ERR_BADSLOT:
1565 case -NFS4ERR_BAD_HIGH_SLOT:
1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1567 case -NFS4ERR_DEADSESSION:
1568 set_bit(NFS_DELEGATED_STATE, &state->flags);
1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1570 return -EAGAIN;
1571 case -NFS4ERR_STALE_CLIENTID:
1572 case -NFS4ERR_STALE_STATEID:
1573 set_bit(NFS_DELEGATED_STATE, &state->flags);
1574 case -NFS4ERR_EXPIRED:
1575 /* Don't recall a delegation if it was lost */
1576 nfs4_schedule_lease_recovery(server->nfs_client);
1577 return -EAGAIN;
352297b9
CL		 1578 case -NFS4ERR_MOVED:
1579 nfs4_schedule_migration_recovery(server);
1580 return -EAGAIN;
8ef2f8d4
CL		 1581 case -NFS4ERR_LEASE_MOVED:
1582 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1583 return -EAGAIN;
be76b5b6
TM		 1584 case -NFS4ERR_DELEG_REVOKED:
1585 case -NFS4ERR_ADMIN_REVOKED:
1586 case -NFS4ERR_BAD_STATEID:
db4f2e63 1587 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1588 nfs_inode_find_state_and_recover(state->inode,
1589 stateid);
1590 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1591 return 0;
1592 case -NFS4ERR_DELAY:
1593 case -NFS4ERR_GRACE:
1594 set_bit(NFS_DELEGATED_STATE, &state->flags);
1595 ssleep(1);
1596 return -EAGAIN;
db4f2e63
TM		 1597 case -ENOMEM:
1598 case -NFS4ERR_DENIED:
1599 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1600 return 0;
be76b5b6 1601 }
1da177e4
LT		 1602 return err;
1603}
1604
db4f2e63
TM		 1605int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1606{
1607 struct nfs_server *server = NFS_SERVER(state->inode);
1608 struct nfs4_opendata *opendata;
1609 int err;
1610
1611 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1612 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1613 if (IS_ERR(opendata))
1614 return PTR_ERR(opendata);
1615 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1616 err = nfs4_open_recover(opendata, state);
1617 nfs4_opendata_put(opendata);
1618 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1619}
1620
be05c860
CL		 1621static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1622{
1623 struct nfs4_opendata *data = calldata;
1624
1625 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1626 &data->o_res.seq_res, task);
1627}
1628
cdd4e68b
TM		 1629static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1630{
1631 struct nfs4_opendata *data = calldata;
1632
be05c860
CL		 1633 nfs40_sequence_done(task, &data->o_res.seq_res);
1634
cdd4e68b 1635 data->rpc_status = task->tk_status;
26e976a8 1636 if (data->rpc_status == 0) {
f597c537 1637 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1638 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1639 renew_lease(data->o_res.server, data->timestamp);
3e309914 1640 data->rpc_done = 1;
26e976a8 1641 }
cdd4e68b
TM		 1642}
1643
1644static void nfs4_open_confirm_release(void *calldata)
1645{
1646 struct nfs4_opendata *data = calldata;
1647 struct nfs4_state *state = NULL;
1648
1649 /* If this request hasn't been cancelled, do nothing */
1650 if (data->cancelled == 0)
1651 goto out_free;
1652 /* In case of error, no cleanup! */
3e309914 1653 if (!data->rpc_done)
cdd4e68b 1654 goto out_free;
cdd4e68b 1655 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1656 if (!IS_ERR(state))
643168c2 1657 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1658out_free:
c6d00e63 1659 nfs4_opendata_put(data);
cdd4e68b
TM		 1660}
1661
1662static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1663 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1664 .rpc_call_done = nfs4_open_confirm_done,
1665 .rpc_release = nfs4_open_confirm_release,
1666};
1667
1668/*
1669 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1670 */
1671static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1672{
1673 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1674 struct rpc_task *task;
5138fde0
TM		 1675 struct rpc_message msg = {
1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1677 .rpc_argp = &data->c_arg,
1678 .rpc_resp = &data->c_res,
1679 .rpc_cred = data->owner->so_cred,
1680 };
c970aa85
TM		 1681 struct rpc_task_setup task_setup_data = {
1682 .rpc_client = server->client,
5138fde0 1683 .rpc_message = &msg,
c970aa85
TM		 1684 .callback_ops = &nfs4_open_confirm_ops,
1685 .callback_data = data,
101070ca 1686 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1687 .flags = RPC_TASK_ASYNC,
1688 };
1da177e4
LT		 1689 int status;
1690
be05c860 1691 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1692 kref_get(&data->kref);
3e309914
TM		 1693 data->rpc_done = 0;
1694 data->rpc_status = 0;
5138fde0 1695 data->timestamp = jiffies;
c970aa85 1696 task = rpc_run_task(&task_setup_data);
7a1218a2 1697 if (IS_ERR(task))
cdd4e68b 1698 return PTR_ERR(task);
cdd4e68b
TM		 1699 status = nfs4_wait_for_completion_rpc_task(task);
1700 if (status != 0) {
1701 data->cancelled = 1;
1702 smp_wmb();
1703 } else
1704 status = data->rpc_status;
e6b3c4db 1705 rpc_put_task(task);
1da177e4
LT		 1706 return status;
1707}
1708
24ac23ab 1709static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1710{
24ac23ab
TM		 1711 struct nfs4_opendata *data = calldata;
1712 struct nfs4_state_owner *sp = data->owner;
549b19cc 1713 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1714
24ac23ab 1715 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1716 goto out_wait;
aac00a8d
TM		 1717 /*
1718 * Check if we still need to send an OPEN call, or if we can use
1719 * a delegation instead.
1720 */
1721 if (data->state != NULL) {
1722 struct nfs_delegation *delegation;
1723
dc0b027d 1724 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1725 goto out_no_action;
aac00a8d
TM		 1726 rcu_read_lock();
1727 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1728 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1729 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1730 can_open_delegated(delegation, data->o_arg.fmode))
1731 goto unlock_no_action;
aac00a8d
TM		 1732 rcu_read_unlock();
1733 }
95b72eb0 1734 /* Update client id. */
549b19cc 1735 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1736 switch (data->o_arg.claim) {
1737 case NFS4_OPEN_CLAIM_PREVIOUS:
1738 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1739 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1740 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1741 case NFS4_OPEN_CLAIM_FH:
1742 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1743 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1744 }
26e976a8 1745 data->timestamp = jiffies;
035168ab 1746 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1747 &data->o_arg.seq_args,
2240a9e2
TM		 1748 &data->o_res.seq_res,
1749 task) != 0)
1750 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1751
1752 /* Set the create mode (note dependency on the session type) */
1753 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1754 if (data->o_arg.open_flags & O_EXCL) {
1755 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1756 if (nfs4_has_persistent_session(clp))
1757 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1758 else if (clp->cl_mvops->minor_version > 0)
1759 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1760 }
6ee41268 1761 return;
652f89f6
TM		 1762unlock_no_action:
1763 rcu_read_unlock();
6ee41268
TM		 1764out_no_action:
1765 task->tk_action = NULL;
c8da19b9 1766out_wait:
b75ad4cd 1767 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1768}
1769
24ac23ab
TM		 1770static void nfs4_open_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1da177e4 1773
24ac23ab 1774 data->rpc_status = task->tk_status;
d898528c 1775
14516c3a
TM		 1776 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1777 return;
d898528c 1778
24ac23ab 1779 if (task->tk_status == 0) {
807d66d8
TM		 1780 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1781 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1782 case S_IFREG:
1783 break;
1784 case S_IFLNK:
24ac23ab 1785 data->rpc_status = -ELOOP;
6f926b5b
TM		 1786 break;
1787 case S_IFDIR:
24ac23ab 1788 data->rpc_status = -EISDIR;
6f926b5b
TM		 1789 break;
1790 default:
24ac23ab 1791 data->rpc_status = -ENOTDIR;
807d66d8 1792 }
6f926b5b 1793 }
26e976a8 1794 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1795 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1796 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1797 }
3e309914 1798 data->rpc_done = 1;
24ac23ab 1799}
6f926b5b 1800
24ac23ab
TM		 1801static void nfs4_open_release(void *calldata)
1802{
1803 struct nfs4_opendata *data = calldata;
1804 struct nfs4_state *state = NULL;
1805
1806 /* If this request hasn't been cancelled, do nothing */
1807 if (data->cancelled == 0)
1808 goto out_free;
1809 /* In case of error, no cleanup! */
3e309914 1810 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1811 goto out_free;
1812 /* In case we need an open_confirm, no cleanup! */
1813 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1814 goto out_free;
24ac23ab 1815 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1816 if (!IS_ERR(state))
643168c2 1817 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1818out_free:
c6d00e63 1819 nfs4_opendata_put(data);
24ac23ab
TM		 1820}
1821
1822static const struct rpc_call_ops nfs4_open_ops = {
1823 .rpc_call_prepare = nfs4_open_prepare,
1824 .rpc_call_done = nfs4_open_done,
1825 .rpc_release = nfs4_open_release,
1826};
1827
b257957e 1828static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1829{
1830 struct inode *dir = data->dir->d_inode;
1831 struct nfs_server *server = NFS_SERVER(dir);
1832 struct nfs_openargs *o_arg = &data->o_arg;
1833 struct nfs_openres *o_res = &data->o_res;
1834 struct rpc_task *task;
5138fde0
TM		 1835 struct rpc_message msg = {
1836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1837 .rpc_argp = o_arg,
1838 .rpc_resp = o_res,
1839 .rpc_cred = data->owner->so_cred,
1840 };
c970aa85
TM		 1841 struct rpc_task_setup task_setup_data = {
1842 .rpc_client = server->client,
5138fde0 1843 .rpc_message = &msg,
c970aa85
TM		 1844 .callback_ops = &nfs4_open_ops,
1845 .callback_data = data,
101070ca 1846 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1847 .flags = RPC_TASK_ASYNC,
1848 };
24ac23ab
TM		 1849 int status;
1850
a9c92d6b 1851 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1852 kref_get(&data->kref);
3e309914
TM		 1853 data->rpc_done = 0;
1854 data->rpc_status = 0;
2ced46c2 1855 data->cancelled = 0;
bdeca1b7
TM		 1856 data->is_recover = 0;
1857 if (isrecover) {
8fe72bac 1858 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1859 data->is_recover = 1;
1860 }
c970aa85 1861 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1862 if (IS_ERR(task))
1863 return PTR_ERR(task);
1864 status = nfs4_wait_for_completion_rpc_task(task);
1865 if (status != 0) {
1866 data->cancelled = 1;
1867 smp_wmb();
1868 } else
1869 status = data->rpc_status;
1870 rpc_put_task(task);
1871
1872 return status;
1873}
1874
1875static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1876{
1877 struct inode *dir = data->dir->d_inode;
1878 struct nfs_openres *o_res = &data->o_res;
1879 int status;
1880
1881 status = nfs4_run_open_task(data, 1);
1882 if (status != 0 || !data->rpc_done)
1883 return status;
1884
6926afd1
TM		 1885 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1886
b257957e
AB		 1887 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1888 status = _nfs4_proc_open_confirm(data);
1889 if (status != 0)
1890 return status;
1891 }
1892
1893 return status;
1894}
1895
6168f62c
WAA		 1896static int nfs4_opendata_access(struct rpc_cred *cred,
1897 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1898 struct nfs4_state *state, fmode_t fmode,
1899 int openflags)
6168f62c
WAA		 1900{
1901 struct nfs_access_entry cache;
1902 u32 mask;
1903
1904 /* access call failed or for some reason the server doesn't
1905 * support any access modes -- defer access call until later */
1906 if (opendata->o_res.access_supported == 0)
1907 return 0;
1908
1909 mask = 0;
bbd3a8ee 1910 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1911 * write mode bits, but POSIX allows the creating process to write.
1912 * use openflags to check for exec, because fmode won't
1913 * always have FMODE_EXEC set when file open for exec. */
1914 if (openflags & __FMODE_EXEC) {
1915 /* ONLY check for exec rights */
1916 mask = MAY_EXEC;
1917 } else if (fmode & FMODE_READ)
1918 mask = MAY_READ;
6168f62c
WAA		 1919
1920 cache.cred = cred;
1921 cache.jiffies = jiffies;
1922 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1923 nfs_access_add_cache(state->inode, &cache);
1924
bbd3a8ee 1925 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1926 return 0;
1927
1928 /* even though OPEN succeeded, access is denied. Close the file */
1929 nfs4_close_state(state, fmode);
998f40b5 1930 return -EACCES;
6168f62c
WAA		 1931}
1932
b257957e
AB		 1933/*
1934 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1935 */
1936static int _nfs4_proc_open(struct nfs4_opendata *data)
1937{
1938 struct inode *dir = data->dir->d_inode;
1939 struct nfs_server *server = NFS_SERVER(dir);
1940 struct nfs_openargs *o_arg = &data->o_arg;
1941 struct nfs_openres *o_res = &data->o_res;
1942 int status;
1943
1944 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1945 if (!data->rpc_done)
1946 return status;
1947 if (status != 0) {
1948 if (status == -NFS4ERR_BADNAME &&
1949 !(o_arg->open_flags & O_CREAT))
1950 return -ENOENT;
24ac23ab 1951 return status;
08ef7bd3 1952 }
24ac23ab 1953
6926afd1
TM		 1954 nfs_fattr_map_and_free_names(server, &data->f_attr);
1955
5bc2afc2 1956 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1957 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1958 if (o_arg->open_flags & O_EXCL)
1959 data->file_created = 1;
1960 else if (o_res->cinfo.before != o_res->cinfo.after)
1961 data->file_created = 1;
1962 }
0df5dd4a
TM		 1963 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1964 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1965 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1966 status = _nfs4_proc_open_confirm(data);
1da177e4 1967 if (status != 0)
24ac23ab 1968 return status;
1da177e4
LT		 1969 }
1970 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1971 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1972 return 0;
1da177e4
LT		 1973}
1974
d83217c1
AA		 1975static int nfs4_recover_expired_lease(struct nfs_server *server)
1976{
1977 return nfs4_client_recover_expired_lease(server->nfs_client);
1978}
1979
1da177e4
LT		 1980/*
1981 * OPEN_EXPIRED:
1982 * reclaim state on the server after a network partition.
1983 * Assumes caller holds the appropriate lock
1984 */
539cd03a 1985static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1986{
e56e0b78 1987 struct nfs4_opendata *opendata;
864472e9 1988 int ret;
1da177e4 1989
4a1c0893 1990 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1991 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1992 if (IS_ERR(opendata))
1993 return PTR_ERR(opendata);
864472e9 1994 ret = nfs4_open_recover(opendata, state);
35d05778 1995 if (ret == -ESTALE)
3d4ff43d 1996 d_drop(ctx->dentry);
c6d00e63 1997 nfs4_opendata_put(opendata);
864472e9 1998 return ret;
1da177e4
LT		 1999}
2000
a9ed2e25 2001static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2002{
539cd03a 2003 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2004 struct nfs4_exception exception = { };
2005 int err;
2006
2007 do {
539cd03a 2008 err = _nfs4_open_expired(ctx, state);
42113a75 2009 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2010 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2011 continue;
a9ed2e25
TM		 2012 switch (err) {
2013 default:
2014 goto out;
2015 case -NFS4ERR_GRACE:
2016 case -NFS4ERR_DELAY:
2017 nfs4_handle_exception(server, err, &exception);
2018 err = 0;
2019 }
202b50dc 2020 } while (exception.retry);
a9ed2e25 2021out:
202b50dc
TM		 2022 return err;
2023}
2024
1da177e4
LT		 2025static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2026{
1da177e4 2027 struct nfs_open_context *ctx;
864472e9 2028 int ret;
1da177e4 2029
864472e9
TM		 2030 ctx = nfs4_state_find_open_context(state);
2031 if (IS_ERR(ctx))
91876b13 2032 return -EAGAIN;
539cd03a 2033 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2034 put_nfs_open_context(ctx);
2035 return ret;
1da177e4
LT		 2036}
2037
f062eb6c 2038#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2039static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2040{
f062eb6c 2041 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2042 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2043 struct nfs_delegation *delegation;
2044 struct rpc_cred *cred = NULL;
2045 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2046
2047 /* If a state reset has been done, test_stateid is unneeded */
2048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2049 return;
2050
ab7cb0df
TM		 2051 /* Get the delegation credential for use by test/free_stateid */
2052 rcu_read_lock();
2053 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2054 if (delegation != NULL &&
2055 nfs4_stateid_match(&delegation->stateid, stateid)) {
2056 cred = get_rpccred(delegation->cred);
2057 rcu_read_unlock();
2058 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2059 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2060 } else
2061 rcu_read_unlock();
2062
3e60ffdd
CL		 2063 if (status != NFS_OK) {
2064 /* Free the stateid unless the server explicitly
2065 * informs us the stateid is unrecognized. */
2066 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2067 nfs41_free_stateid(server, stateid, cred);
6938867e 2068 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2069
6938867e
BS		 2070 write_seqlock(&state->seqlock);
2071 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2072 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2073 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2074 }
ab7cb0df
TM		 2075
2076 if (cred != NULL)
2077 put_rpccred(cred);
3e60ffdd
CL		 2078}
2079
2080/**
2081 * nfs41_check_open_stateid - possibly free an open stateid
2082 *
2083 * @state: NFSv4 state for an inode
2084 *
2085 * Returns NFS_OK if recovery for this stateid is now finished.
2086 * Otherwise a negative NFS4ERR value is returned.
2087 */
2088static int nfs41_check_open_stateid(struct nfs4_state *state)
2089{
2090 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2091 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2092 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2093 int status;
2094
2095 /* If a state reset has been done, test_stateid is unneeded */
2096 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2097 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2098 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2099 return -NFS4ERR_BAD_STATEID;
2100
ab7cb0df 2101 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2102 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2103 if (status != NFS_OK) {
2104 /* Free the stateid unless the server explicitly
2105 * informs us the stateid is unrecognized. */
2106 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2107 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2108
2109 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2110 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2111 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2112 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2113 }
2114 return status;
2115}
2116
2117static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2118{
eb64cf96 2119 int status;
b01dd1d8 2120
3e60ffdd
CL		 2121 nfs41_clear_delegation_stateid(state);
2122 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2123 if (status != NFS_OK)
2124 status = nfs4_open_expired(sp, state);
2125 return status;
f062eb6c
BS		 2126}
2127#endif
2128
aa53ed54
JL		 2129/*
2130 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2131 * fields corresponding to attributes that were used to store the verifier.
2132 * Make sure we clobber those fields in the later setattr call
2133 */
2134static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2135{
2136 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2137 !(sattr->ia_valid & ATTR_ATIME_SET))
2138 sattr->ia_valid |= ATTR_ATIME;
2139
2140 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2141 !(sattr->ia_valid & ATTR_MTIME_SET))
2142 sattr->ia_valid |= ATTR_MTIME;
2143}
2144
c21443c2
TM		 2145static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2146 fmode_t fmode,
2147 int flags,
3efb9722 2148 struct nfs_open_context *ctx)
c21443c2
TM		 2149{
2150 struct nfs4_state_owner *sp = opendata->owner;
2151 struct nfs_server *server = sp->so_server;
275bb307 2152 struct dentry *dentry;
c21443c2
TM		 2153 struct nfs4_state *state;
2154 unsigned int seq;
2155 int ret;
2156
2157 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2158
2159 ret = _nfs4_proc_open(opendata);
2160 if (ret != 0)
2161 goto out;
2162
2163 state = nfs4_opendata_to_nfs4_state(opendata);
2164 ret = PTR_ERR(state);
2165 if (IS_ERR(state))
2166 goto out;
2167 if (server->caps & NFS_CAP_POSIX_LOCK)
2168 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2169
275bb307
TM		 2170 dentry = opendata->dentry;
2171 if (dentry->d_inode == NULL) {
2172 /* FIXME: Is this d_drop() ever needed? */
2173 d_drop(dentry);
2174 dentry = d_add_unique(dentry, igrab(state->inode));
2175 if (dentry == NULL) {
2176 dentry = opendata->dentry;
2177 } else if (dentry != ctx->dentry) {
2178 dput(ctx->dentry);
2179 ctx->dentry = dget(dentry);
2180 }
2181 nfs_set_verifier(dentry,
2182 nfs_save_change_attribute(opendata->dir->d_inode));
2183 }
2184
c21443c2
TM		 2185 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2186 if (ret != 0)
2187 goto out;
2188
3efb9722 2189 ctx->state = state;
c45ffdd2
TM		 2190 if (dentry->d_inode == state->inode) {
2191 nfs_inode_attach_open_context(ctx);
2192 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2193 nfs4_schedule_stateid_recovery(server, state);
2194 }
c21443c2
TM		 2195out:
2196 return ret;
2197}
2198
1da177e4 2199/*
24ac23ab 2200 * Returns a referenced nfs4_state
1da177e4 2201 */
82be417a 2202static int _nfs4_do_open(struct inode *dir,
4197a055 2203 struct nfs_open_context *ctx,
82be417a
AA		 2204 int flags,
2205 struct iattr *sattr,
5bc2afc2
TM		 2206 struct nfs4_label *label,
2207 int *opened)
1da177e4
LT		 2208{
2209 struct nfs4_state_owner *sp;
2210 struct nfs4_state *state = NULL;
2211 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2212 struct nfs4_opendata *opendata;
4197a055
TM		 2213 struct dentry *dentry = ctx->dentry;
2214 struct rpc_cred *cred = ctx->cred;
2215 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2216 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2217 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2218 struct nfs4_label *olabel = NULL;
aac00a8d 2219 int status;
1da177e4
LT		 2220
2221 /* Protect against reboot recovery conflicts */
1da177e4 2222 status = -ENOMEM;
d1e284d5
TM		 2223 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2224 if (sp == NULL) {
1da177e4
LT		 2225 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2226 goto out_err;
2227 }
58d9714a
TM		 2228 status = nfs4_recover_expired_lease(server);
2229 if (status != 0)
b4454fe1 2230 goto err_put_state_owner;
82a2c1b7
AV		 2231 if (dentry->d_inode != NULL)
2232 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2233 status = -ENOMEM;
49f9a0fa
TM		 2234 if (dentry->d_inode)
2235 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2236 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2237 label, claim, GFP_KERNEL);
e56e0b78 2238 if (opendata == NULL)
95d35cb4 2239 goto err_put_state_owner;
1da177e4 2240
14c43f76
DQ		 2241 if (label) {
2242 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2243 if (IS_ERR(olabel)) {
2244 status = PTR_ERR(olabel);
2245 goto err_opendata_put;
2246 }
2247 }
2248
82be417a
AA		 2249 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2250 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2251 if (!opendata->f_attr.mdsthreshold)
14c43f76 2252 goto err_free_label;
1549210f 2253 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2254 }
82a2c1b7
AV		 2255 if (dentry->d_inode != NULL)
2256 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2257
3efb9722 2258 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2259 if (status != 0)
14c43f76 2260 goto err_free_label;
3efb9722 2261 state = ctx->state;
6168f62c 2262
549b19cc
TM		 2263 if ((opendata->o_arg.open_flags & O_EXCL) &&
2264 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2265 nfs4_exclusive_attrset(opendata, sattr);
2266
2267 nfs_fattr_init(opendata->o_res.f_attr);
2268 status = nfs4_do_setattr(state->inode, cred,
2269 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2270 state, label, olabel);
2271 if (status == 0) {
0ab64e0e 2272 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2273 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2274 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2275 }
0ab64e0e 2276 }
5bc2afc2
TM		 2277 if (opendata->file_created)
2278 *opened |= FILE_CREATED;
82be417a
AA		 2279
2280 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2281 *ctx_th = opendata->f_attr.mdsthreshold;
2282 else
2283 kfree(opendata->f_attr.mdsthreshold);
2284 opendata->f_attr.mdsthreshold = NULL;
2285
14c43f76
DQ		 2286 nfs4_label_free(olabel);
2287
c6d00e63 2288 nfs4_opendata_put(opendata);
1da177e4 2289 nfs4_put_state_owner(sp);
1da177e4 2290 return 0;
14c43f76
DQ		 2291err_free_label:
2292 nfs4_label_free(olabel);
c6d00e63 2293err_opendata_put:
82be417a 2294 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2295 nfs4_opendata_put(opendata);
e56e0b78
TM		 2296err_put_state_owner:
2297 nfs4_put_state_owner(sp);
1da177e4 2298out_err:
1da177e4
LT		 2299 return status;
2300}
2301
2302
82be417a 2303static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2304 struct nfs_open_context *ctx,
82be417a
AA		 2305 int flags,
2306 struct iattr *sattr,
5bc2afc2
TM		 2307 struct nfs4_label *label,
2308 int *opened)
1da177e4 2309{
49f9a0fa 2310 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2311 struct nfs4_exception exception = { };
2312 struct nfs4_state *res;
2313 int status;
2314
2315 do {
5bc2afc2 2316 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2317 res = ctx->state;
42113a75 2318 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2319 if (status == 0)
2320 break;
2321 /* NOTE: BAD_SEQID means the server and client disagree about the
2322 * book-keeping w.r.t. state-changing operations
2323 * (OPEN/CLOSE/LOCK/LOCKU...)
2324 * It is actually a sign of a bug on the client or on the server.
2325 *
2326 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2327 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2328 * have unhashed the old state_owner for us, and that we can
2329 * therefore safely retry using a new one. We should still warn
2330 * the user though...
2331 */
2332 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2333 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2334 " returned a bad sequence-id error!\n",
2335 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2336 exception.retry = 1;
2337 continue;
2338 }
550f5747
TM		 2339 /*
2340 * BAD_STATEID on OPEN means that the server cancelled our
2341 * state before it received the OPEN_CONFIRM.
2342 * Recover by retrying the request as per the discussion
2343 * on Page 181 of RFC3530.
2344 */
2345 if (status == -NFS4ERR_BAD_STATEID) {
2346 exception.retry = 1;
2347 continue;
2348 }
aac00a8d
TM		 2349 if (status == -EAGAIN) {
2350 /* We must have found a delegation */
2351 exception.retry = 1;
2352 continue;
2353 }
49f9a0fa
TM		 2354 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2355 continue;
2356 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2357 status, &exception));
2358 } while (exception.retry);
2359 return res;
2360}
2361
659bfcd6
TM		 2362static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2363 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2364 struct nfs4_state *state, struct nfs4_label *ilabel,
2365 struct nfs4_label *olabel)
1da177e4 2366{
3e4f6290 2367 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2368 struct nfs_setattrargs arg = {
3e4f6290 2369 .fh = NFS_FH(inode),
1da177e4
LT		 2370 .iap = sattr,
2371 .server = server,
2372 .bitmask = server->attr_bitmask,
1775fd3e 2373 .label = ilabel,
1da177e4
LT		 2374 };
2375 struct nfs_setattrres res = {
2376 .fattr = fattr,
1775fd3e 2377 .label = olabel,
1da177e4
LT		 2378 .server = server,
2379 };
2380 struct rpc_message msg = {
659bfcd6
TM		 2381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2382 .rpc_argp = &arg,
2383 .rpc_resp = &res,
2384 .rpc_cred = cred,
1da177e4 2385 };
26e976a8 2386 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2387 fmode_t fmode;
2388 bool truncate;
65e4308d 2389 int status;
1da177e4 2390
aa9c2669
DQ		 2391 arg.bitmask = nfs4_bitmask(server, ilabel);
2392 if (ilabel)
2393 arg.bitmask = nfs4_bitmask(server, olabel);
2394
0e574af1 2395 nfs_fattr_init(fattr);
1da177e4 2396
ee3ae84e
TM		 2397 /* Servers should only apply open mode checks for file size changes */
2398 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2399 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2400
2401 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2402 /* Use that stateid */
2403 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2404 struct nfs_lockowner lockowner = {
2405 .l_owner = current->files,
2406 .l_pid = current->tgid,
2407 };
4fc8796d 2408 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2409 &lockowner);
08e9eac4 2410 } else
f597c537 2411 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2412
7c513058 2413 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2414 if (status == 0 && state != NULL)
2415 renew_lease(server, timestamp);
65e4308d 2416 return status;
1da177e4
LT		 2417}
2418
659bfcd6
TM		 2419static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2420 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2421 struct nfs4_state *state, struct nfs4_label *ilabel,
2422 struct nfs4_label *olabel)
1da177e4 2423{
3e4f6290 2424 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2425 struct nfs4_exception exception = {
2426 .state = state,
3114ea7a 2427 .inode = inode,
a1d0b5ee 2428 };
1da177e4
LT		 2429 int err;
2430 do {
1775fd3e 2431 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2432 trace_nfs4_setattr(inode, err);
451146be
TM		 2433 switch (err) {
2434 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2435 if (!(sattr->ia_valid & ATTR_SIZE)) {
2436 pr_warn_once("NFSv4: server %s is incorrectly "
2437 "applying open mode checks to "
2438 "a SETATTR that is not "
2439 "changing file size.\n",
2440 server->nfs_client->cl_hostname);
2441 }
451146be
TM		 2442 if (state && !(state->state & FMODE_WRITE)) {
2443 err = -EBADF;
2444 if (sattr->ia_valid & ATTR_OPEN)
2445 err = -EACCES;
2446 goto out;
2447 }
2448 }
2449 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2450 } while (exception.retry);
451146be 2451out:
1da177e4
LT		 2452 return err;
2453}
2454
2455struct nfs4_closedata {
2456 struct inode *inode;
2457 struct nfs4_state *state;
2458 struct nfs_closeargs arg;
2459 struct nfs_closeres res;
516a6af6 2460 struct nfs_fattr fattr;
26e976a8 2461 unsigned long timestamp;
f7e8917a
FI		 2462 bool roc;
2463 u32 roc_barrier;
1da177e4
LT		 2464};
2465
963d8fe5 2466static void nfs4_free_closedata(void *data)
9512135d 2467{
963d8fe5
TM		 2468 struct nfs4_closedata *calldata = data;
2469 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2470 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2471
f7e8917a
FI		 2472 if (calldata->roc)
2473 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2474 nfs4_put_open_state(calldata->state);
2475 nfs_free_seqid(calldata->arg.seqid);
9512135d 2476 nfs4_put_state_owner(sp);
322b2b90 2477 nfs_sb_deactive(sb);
9512135d
TM		 2478 kfree(calldata);
2479}
2480
88069f77
TM		 2481static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2482 fmode_t fmode)
2483{
2484 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2485 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2486 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2487 case FMODE_WRITE:
88069f77 2488 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2489 break;
2490 case FMODE_READ:
88069f77 2491 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2492 break;
2493 case 0:
2494 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2495 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2496 clear_bit(NFS_OPEN_STATE, &state->flags);
2497 }
88069f77
TM		 2498 spin_unlock(&state->owner->so_lock);
2499}
2500
963d8fe5 2501static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2502{
963d8fe5 2503 struct nfs4_closedata *calldata = data;
1da177e4 2504 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2505 struct nfs_server *server = NFS_SERVER(calldata->inode);
2506
a3ca5651 2507 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2508 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2509 return;
42113a75 2510 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2511 /* hmm. we are done with the inode, and in the process of freeing
2512 * the state_owner. we keep this around to process errors
2513 */
1da177e4
LT		 2514 switch (task->tk_status) {
2515 case 0:
f7e8917a
FI		 2516 if (calldata->roc)
2517 pnfs_roc_set_barrier(state->inode,
2518 calldata->roc_barrier);
45328c35 2519 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2520 renew_lease(server, calldata->timestamp);
88069f77
TM		 2521 nfs4_close_clear_stateid_flags(state,
2522 calldata->arg.fmode);
1da177e4
LT		 2523 break;
2524 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2525 case -NFS4ERR_OLD_STATEID:
2526 case -NFS4ERR_BAD_STATEID:
1da177e4 2527 case -NFS4ERR_EXPIRED:
dc0b027d 2528 if (calldata->arg.fmode == 0)
9e33bed5 2529 break;
1da177e4 2530 default:
72211dbe
TM		 2531 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2532 rpc_restart_call_prepare(task);
1da177e4 2533 }
72211dbe 2534 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2535 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2536 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2537}
2538
4ce70ada 2539static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2540{
4ce70ada 2541 struct nfs4_closedata *calldata = data;
9512135d 2542 struct nfs4_state *state = calldata->state;
7fdab069 2543 struct inode *inode = calldata->inode;
88069f77 2544 int call_close = 0;
9512135d 2545
a3ca5651 2546 dprintk("%s: begin!\n", __func__);
963d8fe5 2547 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2548 goto out_wait;
003707c7 2549
88069f77
TM		 2550 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2551 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2552 spin_lock(&state->owner->so_lock);
003707c7 2553 /* Calculate the change in open mode */
e7616923 2554 if (state->n_rdwr == 0) {
003707c7 2555 if (state->n_rdonly == 0) {
88069f77
TM		 2556 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2557 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2558 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2559 }
2560 if (state->n_wronly == 0) {
88069f77
TM		 2561 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2562 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2563 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2564 }
e7616923 2565 }
5d422301
TM		 2566 if (!nfs4_valid_open_stateid(state))
2567 call_close = 0;
4cecb76f 2568 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2569
2570 if (!call_close) {
963d8fe5 2571 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2572 goto out_no_action;
9512135d 2573 }
88069f77 2574
f7e8917a 2575 if (calldata->arg.fmode == 0) {
88069f77 2576 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2577 if (calldata->roc &&
b9536ad5
AA		 2578 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2579 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2580 goto out_wait;
b9536ad5 2581 }
f7e8917a 2582 }
88069f77 2583
516a6af6 2584 nfs_fattr_init(calldata->res.fattr);
26e976a8 2585 calldata->timestamp = jiffies;
7fdab069 2586 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2587 &calldata->arg.seq_args,
2588 &calldata->res.seq_res,
2240a9e2
TM		 2589 task) != 0)
2590 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2591 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2592 return;
2593out_no_action:
2594 task->tk_action = NULL;
2595out_wait:
2596 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2597}
2598
963d8fe5 2599static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2600 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2601 .rpc_call_done = nfs4_close_done,
2602 .rpc_release = nfs4_free_closedata,
2603};
2604
1da177e4
LT		 2605/*
2606 * It is possible for data to be read/written from a mem-mapped file
2607 * after the sys_close call (which hits the vfs layer as a flush).
2608 * This means that we can't safely call nfsv4 close on a file until
2609 * the inode is cleared. This in turn means that we are not good
2610 * NFSv4 citizens - we do not indicate to the server to update the file's
2611 * share state even when we are done with one of the three share
2612 * stateid's in the inode.
2613 *
2614 * NOTE: Caller must be holding the sp->so_owner semaphore!
2615 */
1f7977c1 2616int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2617{
4a35bd41 2618 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2619 struct nfs4_closedata *calldata;
b39e625b
TM		 2620 struct nfs4_state_owner *sp = state->owner;
2621 struct rpc_task *task;
5138fde0
TM		 2622 struct rpc_message msg = {
2623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2624 .rpc_cred = state->owner->so_cred,
2625 };
c970aa85
TM		 2626 struct rpc_task_setup task_setup_data = {
2627 .rpc_client = server->client,
5138fde0 2628 .rpc_message = &msg,
c970aa85 2629 .callback_ops = &nfs4_close_ops,
101070ca 2630 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2631 .flags = RPC_TASK_ASYNC,
2632 };
9512135d 2633 int status = -ENOMEM;
1da177e4 2634
fa940720
WAA		 2635 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2636 &task_setup_data.rpc_client, &msg);
2637
8535b2be 2638 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2639 if (calldata == NULL)
9512135d 2640 goto out;
a9c92d6b 2641 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2642 calldata->inode = state->inode;
1da177e4 2643 calldata->state = state;
4a35bd41 2644 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2645 calldata->arg.stateid = &state->open_stateid;
1da177e4 2646 /* Serialization for the sequence id */
8535b2be 2647 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2648 if (calldata->arg.seqid == NULL)
2649 goto out_free_calldata;
dc0b027d 2650 calldata->arg.fmode = 0;
a65318bf 2651 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2652 calldata->res.fattr = &calldata->fattr;
c1d51931 2653 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2654 calldata->res.server = server;
1f7977c1 2655 calldata->roc = pnfs_roc(state->inode);
643168c2 2656 nfs_sb_active(calldata->inode->i_sb);
9512135d 2657
1174dd1f
TM		 2658 msg.rpc_argp = &calldata->arg;
2659 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2660 task_setup_data.callback_data = calldata;
2661 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2662 if (IS_ERR(task))
2663 return PTR_ERR(task);
a49c3c77
TM		 2664 status = 0;
2665 if (wait)
2666 status = rpc_wait_for_completion_task(task);
b39e625b 2667 rpc_put_task(task);
a49c3c77 2668 return status;
9512135d
TM		 2669out_free_calldata:
2670 kfree(calldata);
2671out:
b39e625b
TM		 2672 nfs4_put_open_state(state);
2673 nfs4_put_state_owner(sp);
9512135d 2674 return status;
1da177e4
LT		 2675}
2676
2b484297 2677static struct inode *
5bc2afc2
TM		 2678nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2679 int open_flags, struct iattr *attr, int *opened)
1da177e4 2680{
1da177e4 2681 struct nfs4_state *state;
aa9c2669
DQ		 2682 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2683
2684 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2685
565277f6 2686 /* Protect against concurrent sillydeletes */
5bc2afc2 2687 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2688
2689 nfs4_label_release_security(label);
2690
f46e0bd3
TM		 2691 if (IS_ERR(state))
2692 return ERR_CAST(state);
275bb307 2693 return state->inode;
1da177e4
LT		 2694}
2695
1185a552 2696static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2697{
2698 if (ctx->state == NULL)
2699 return;
2700 if (is_sync)
643168c2 2701 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2702 else
643168c2 2703 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2704}
1da177e4 2705
b944dba3
TM		 2706#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2707#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2708#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
2709
1da177e4
LT		 2710static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2711{
43652ad5
BH		 2712 struct nfs4_server_caps_arg args = {
2713 .fhandle = fhandle,
2714 };
1da177e4
LT		 2715 struct nfs4_server_caps_res res = {};
2716 struct rpc_message msg = {
2717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2718 .rpc_argp = &args,
1da177e4
LT		 2719 .rpc_resp = &res,
2720 };
2721 int status;
2722
7c513058 2723 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2724 if (status == 0) {
b944dba3
TM		 2725 /* Sanity check the server answers */
2726 switch (server->nfs_client->cl_minorversion) {
2727 case 0:
2728 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2729 res.attr_bitmask[2] = 0;
2730 break;
2731 case 1:
2732 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2733 break;
2734 case 2:
2735 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2736 }
1da177e4 2737 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2738 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2739 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2740 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2741 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2742 NFS_CAP_CTIME|NFS_CAP_MTIME|
2743 NFS_CAP_SECURITY_LABEL);
1da177e4
LT		 2744 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2745 server->caps |= NFS_CAP_ACLS;
2746 if (res.has_links != 0)
2747 server->caps |= NFS_CAP_HARDLINKS;
2748 if (res.has_symlinks != 0)
2749 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2750 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2751 server->caps |= NFS_CAP_FILEID;
2752 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2753 server->caps |= NFS_CAP_MODE;
2754 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2755 server->caps |= NFS_CAP_NLINK;
2756 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2757 server->caps |= NFS_CAP_OWNER;
2758 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2759 server->caps |= NFS_CAP_OWNER_GROUP;
2760 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2761 server->caps |= NFS_CAP_ATIME;
2762 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2763 server->caps |= NFS_CAP_CTIME;
2764 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2765 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2766#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2767 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2768 server->caps |= NFS_CAP_SECURITY_LABEL;
2769#endif
2770 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2771 sizeof(server->attr_bitmask));
b944dba3 2772 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2773
a65318bf
TM		 2774 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2775 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2776 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2777 server->cache_consistency_bitmask[2] = 0;
1da177e4 2778 server->acl_bitmask = res.acl_bitmask;
264e6351 2779 server->fh_expire_type = res.fh_expire_type;
1da177e4 2780 }
cccef3b9 2781
1da177e4
LT		 2782 return status;
2783}
2784
55a97593 2785int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2786{
2787 struct nfs4_exception exception = { };
2788 int err;
2789 do {
2790 err = nfs4_handle_exception(server,
2791 _nfs4_server_capabilities(server, fhandle),
2792 &exception);
2793 } while (exception.retry);
2794 return err;
2795}
2796
2797static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2798 struct nfs_fsinfo *info)
2799{
aa9c2669 2800 u32 bitmask[3];
1da177e4 2801 struct nfs4_lookup_root_arg args = {
aa9c2669 2802 .bitmask = bitmask,
1da177e4
LT		 2803 };
2804 struct nfs4_lookup_res res = {
2805 .server = server,
0e574af1 2806 .fattr = info->fattr,
1da177e4
LT		 2807 .fh = fhandle,
2808 };
2809 struct rpc_message msg = {
2810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2811 .rpc_argp = &args,
2812 .rpc_resp = &res,
2813 };
008f55d0 2814
aa9c2669
DQ		 2815 bitmask[0] = nfs4_fattr_bitmap[0];
2816 bitmask[1] = nfs4_fattr_bitmap[1];
2817 /*
2818 * Process the label in the upcoming getfattr
2819 */
2820 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2821
0e574af1 2822 nfs_fattr_init(info->fattr);
7c513058 2823 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2824}
2825
2826static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2827 struct nfs_fsinfo *info)
2828{
2829 struct nfs4_exception exception = { };
2830 int err;
2831 do {
fb8a5ba8 2832 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2833 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2834 switch (err) {
2835 case 0:
2836 case -NFS4ERR_WRONGSEC:
05e9cfb4 2837 goto out;
fb8a5ba8
BS		 2838 default:
2839 err = nfs4_handle_exception(server, err, &exception);
2840 }
1da177e4 2841 } while (exception.retry);
05e9cfb4 2842out:
1da177e4
LT		 2843 return err;
2844}
2845
8f70e95f
BS		 2846static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2847 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2848{
c2190661
TM		 2849 struct rpc_auth_create_args auth_args = {
2850 .pseudoflavor = flavor,
2851 };
8f70e95f
BS		 2852 struct rpc_auth *auth;
2853 int ret;
2854
c2190661 2855 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2856 if (IS_ERR(auth)) {
75bc8821 2857 ret = -EACCES;
8f70e95f
BS		 2858 goto out;
2859 }
2860 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2861out:
2862 return ret;
2863}
2864
9a744ba3
CL		 2865/*
2866 * Retry pseudoroot lookup with various security flavors. We do this when:
2867 *
2868 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2869 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2870 *
2871 * Returns zero on success, or a negative NFS4ERR value, or a
2872 * negative errno value.
2873 */
801a16dc 2874static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2875 struct nfs_fsinfo *info)
1da177e4 2876{
9a744ba3
CL		 2877 /* Per 3530bis 15.33.5 */
2878 static const rpc_authflavor_t flav_array[] = {
2879 RPC_AUTH_GSS_KRB5P,
2880 RPC_AUTH_GSS_KRB5I,
2881 RPC_AUTH_GSS_KRB5,
c4eafe11 2882 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2883 RPC_AUTH_NULL,
2884 };
2885 int status = -EPERM;
2886 size_t i;
6a1a1e34 2887
4d4b69dd
WAA		 2888 if (server->auth_info.flavor_len > 0) {
2889 /* try each flavor specified by user */
2890 for (i = 0; i < server->auth_info.flavor_len; i++) {
2891 status = nfs4_lookup_root_sec(server, fhandle, info,
2892 server->auth_info.flavors[i]);
2893 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2894 continue;
2895 break;
2896 }
2897 } else {
2898 /* no flavors specified by user, try default list */
2899 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2900 status = nfs4_lookup_root_sec(server, fhandle, info,
2901 flav_array[i]);
2902 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2903 continue;
2904 break;
2905 }
8f70e95f 2906 }
9a744ba3 2907
fb8a5ba8
BS		 2908 /*
2909 * -EACCESS could mean that the user doesn't have correct permissions
2910 * to access the mount. It could also mean that we tried to mount
2911 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2912 * existing mount programs don't handle -EACCES very well so it should
2913 * be mapped to -EPERM instead.
2914 */
2915 if (status == -EACCES)
2916 status = -EPERM;
801a16dc
BS		 2917 return status;
2918}
2919
2ed4b95b
CL		 2920static int nfs4_do_find_root_sec(struct nfs_server *server,
2921 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2922{
2923 int mv = server->nfs_client->cl_minorversion;
2924 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2925}
2926
2927/**
2928 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2929 * @server: initialized nfs_server handle
2930 * @fhandle: we fill in the pseudo-fs root file handle
2931 * @info: we fill in an FSINFO struct
5e6b1990 2932 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2933 *
2934 * Returns zero on success, or a negative errno.
801a16dc 2935 */
3028eb2b 2936int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2937 struct nfs_fsinfo *info,
2938 bool auth_probe)
801a16dc 2939{
2ed4b95b
CL		 2940 int status;
2941
5e6b1990
TM		 2942 switch (auth_probe) {
2943 case false:
2944 status = nfs4_lookup_root(server, fhandle, info);
2945 if (status != -NFS4ERR_WRONGSEC)
2946 break;
5e6b1990 2947 default:
2ed4b95b 2948 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2949 }
2ed4b95b 2950
1da177e4
LT		 2951 if (status == 0)
2952 status = nfs4_server_capabilities(server, fhandle);
2953 if (status == 0)
2954 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2955
c12e87f4 2956 return nfs4_map_errors(status);
1da177e4
LT		 2957}
2958
bae36241
BS		 2959static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2960 struct nfs_fsinfo *info)
2961{
2962 int error;
2963 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2964 struct nfs4_label *label = NULL;
bae36241
BS		 2965
2966 error = nfs4_server_capabilities(server, mntfh);
2967 if (error < 0) {
2968 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2969 return error;
2970 }
2971
14c43f76
DQ		 2972 label = nfs4_label_alloc(server, GFP_KERNEL);
2973 if (IS_ERR(label))
2974 return PTR_ERR(label);
2975
1775fd3e 2976 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2977 if (error < 0) {
2978 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2979 goto err_free_label;
bae36241
BS		 2980 }
2981
2982 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2983 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2984 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2985
14c43f76
DQ		 2986err_free_label:
2987 nfs4_label_free(label);
2988
bae36241
BS		 2989 return error;
2990}
2991
6b97fd3d
MN		 2992/*
2993 * Get locations and (maybe) other attributes of a referral.
2994 * Note that we'll actually follow the referral later when
2995 * we detect fsid mismatch in inode revalidation
2996 */
f05d147f
BS		 2997static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2998 const struct qstr *name, struct nfs_fattr *fattr,
2999 struct nfs_fh *fhandle)
6b97fd3d
MN		 3000{
3001 int status = -ENOMEM;
3002 struct page *page = NULL;
3003 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3004
3005 page = alloc_page(GFP_KERNEL);
3006 if (page == NULL)
3007 goto out;
3008 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3009 if (locations == NULL)
3010 goto out;
3011
f05d147f 3012 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3013 if (status != 0)
3014 goto out;
519ae255
CL		 3015
3016 /*
3017 * If the fsid didn't change, this is a migration event, not a
3018 * referral. Cause us to drop into the exception handler, which
3019 * will kick off migration recovery.
3020 */
6b97fd3d 3021 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3022 dprintk("%s: server did not return a different fsid for"
3023 " a referral at %s\n", __func__, name->name);
519ae255 3024 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3025 goto out;
3026 }
533eb461
AA		 3027 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3028 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3029
533eb461 3030 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3031 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3032 memset(fhandle, 0, sizeof(struct nfs_fh));
3033out:
3034 if (page)
3035 __free_page(page);
5d7ca35a 3036 kfree(locations);
6b97fd3d
MN		 3037 return status;
3038}
3039
1775fd3e
DQ		 3040static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3041 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3042{
3043 struct nfs4_getattr_arg args = {
3044 .fh = fhandle,
3045 .bitmask = server->attr_bitmask,
3046 };
3047 struct nfs4_getattr_res res = {
3048 .fattr = fattr,
1775fd3e 3049 .label = label,
1da177e4
LT		 3050 .server = server,
3051 };
3052 struct rpc_message msg = {
3053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3054 .rpc_argp = &args,
3055 .rpc_resp = &res,
3056 };
aa9c2669
DQ		 3057
3058 args.bitmask = nfs4_bitmask(server, label);
3059
0e574af1 3060 nfs_fattr_init(fattr);
7c513058 3061 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3062}
3063
1775fd3e
DQ		 3064static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3065 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3066{
3067 struct nfs4_exception exception = { };
3068 int err;
3069 do {
b5f875a9
TM		 3070 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3071 trace_nfs4_getattr(server, fhandle, fattr, err);
3072 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3073 &exception);
3074 } while (exception.retry);
3075 return err;
3076}
3077
3078/*
3079 * The file is not closed if it is opened due to the a request to change
3080 * the size of the file. The open call will not be needed once the
3081 * VFS layer lookup-intents are implemented.
3082 *
3083 * Close is called when the inode is destroyed.
3084 * If we haven't opened the file for O_WRONLY, we
3085 * need to in the size_change case to obtain a stateid.
3086 *
3087 * Got race?
3088 * Because OPEN is always done by name in nfsv4, it is
3089 * possible that we opened a different file by the same
3090 * name. We can recognize this race condition, but we
3091 * can't do anything about it besides returning an error.
3092 *
3093 * This will be fixed with VFS changes (lookup-intent).
3094 */
3095static int
3096nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3097 struct iattr *sattr)
3098{
08e9eac4 3099 struct inode *inode = dentry->d_inode;
659bfcd6 3100 struct rpc_cred *cred = NULL;
d530838b 3101 struct nfs4_state *state = NULL;
14c43f76 3102 struct nfs4_label *label = NULL;
1da177e4
LT		 3103 int status;
3104
8a1636c4 3105 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3106 pnfs_commit_and_return_layout(inode);
8a1636c4 3107
0e574af1 3108 nfs_fattr_init(fattr);
1da177e4 3109
2669940d
AA		 3110 /* Deal with open(O_TRUNC) */
3111 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3112 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3113
3114 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3115 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3116 return 0;
3117
d530838b 3118 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3119 if (sattr->ia_valid & ATTR_FILE) {
3120 struct nfs_open_context *ctx;
3121
3122 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3123 if (ctx) {
3124 cred = ctx->cred;
3125 state = ctx->state;
3126 }
659bfcd6 3127 }
08e9eac4 3128
14c43f76
DQ		 3129 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3130 if (IS_ERR(label))
3131 return PTR_ERR(label);
3132
3133 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3134 if (status == 0) {
65e4308d 3135 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3136 nfs_setsecurity(inode, fattr, label);
3137 }
14c43f76 3138 nfs4_label_free(label);
1da177e4
LT		 3139 return status;
3140}
3141
0c2e53f1
TM		 3142static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3143 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3144 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3145{
0c2e53f1 3146 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3147 int status;
3148 struct nfs4_lookup_arg args = {
3149 .bitmask = server->attr_bitmask,
0c2e53f1 3150 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3151 .name = name,
3152 };
3153 struct nfs4_lookup_res res = {
3154 .server = server,
3155 .fattr = fattr,
aa9c2669 3156 .label = label,
2b3de441
DH		 3157 .fh = fhandle,
3158 };
3159 struct rpc_message msg = {
3160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3161 .rpc_argp = &args,
3162 .rpc_resp = &res,
3163 };
3164
aa9c2669
DQ		 3165 args.bitmask = nfs4_bitmask(server, label);
3166
2b3de441
DH		 3167 nfs_fattr_init(fattr);
3168
1da177e4 3169 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3170 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3171 dprintk("NFS reply lookup: %d\n", status);
3172 return status;
3173}
3174
72de53ec 3175static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3176{
7ebb9315 3177 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3178 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3179 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3180 fattr->nlink = 2;
3181}
3182
72de53ec
BS		 3183static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3184 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3185 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3186{
3187 struct nfs4_exception exception = { };
72de53ec 3188 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3189 int err;
3190 do {
1775fd3e 3191 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3192 trace_nfs4_lookup(dir, name, err);
72de53ec 3193 switch (err) {
08ef7bd3 3194 case -NFS4ERR_BADNAME:
72de53ec
BS		 3195 err = -ENOENT;
3196 goto out;
0c2e53f1 3197 case -NFS4ERR_MOVED:
f05d147f 3198 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3199 goto out;
0c2e53f1 3200 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3201 err = -EPERM;
3202 if (client != *clnt)
3203 goto out;
72de53ec
BS		 3204 client = nfs4_create_sec_client(client, dir, name);
3205 if (IS_ERR(client))
3206 return PTR_ERR(client);
3207
3208 exception.retry = 1;
3209 break;
3210 default:
3211 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3212 }
1da177e4 3213 } while (exception.retry);
72de53ec
BS		 3214
3215out:
3216 if (err == 0)
3217 *clnt = client;
3218 else if (client != *clnt)
3219 rpc_shutdown_client(client);
3220
1da177e4
LT		 3221 return err;
3222}
3223
80a16b21 3224static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3225 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3226 struct nfs4_label *label)
72de53ec
BS		 3227{
3228 int status;
3229 struct rpc_clnt *client = NFS_CLIENT(dir);
3230
1775fd3e 3231 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3232 if (client != NFS_CLIENT(dir)) {
3233 rpc_shutdown_client(client);
3234 nfs_fixup_secinfo_attributes(fattr);
3235 }
3236 return status;
3237}
3238
f05d147f
BS		 3239struct rpc_clnt *
3240nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3241 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3242{
b72888cb 3243 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3244 int status;
f05d147f 3245
1775fd3e 3246 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3247 if (status < 0)
f05d147f 3248 return ERR_PTR(status);
b72888cb 3249 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3250}
3251
1da177e4
LT		 3252static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3253{
76b32999 3254 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3255 struct nfs4_accessargs args = {
3256 .fh = NFS_FH(inode),
a4980e78 3257 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3258 };
3259 struct nfs4_accessres res = {
3260 .server = server,
1da177e4 3261 };
1da177e4
LT		 3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3264 .rpc_argp = &args,
3265 .rpc_resp = &res,
3266 .rpc_cred = entry->cred,
3267 };
3268 int mode = entry->mask;
aa9c2669 3269 int status = 0;
1da177e4
LT		 3270
3271 /*
3272 * Determine which access bits we want to ask for...
3273 */
3274 if (mode & MAY_READ)
3275 args.access |= NFS4_ACCESS_READ;
3276 if (S_ISDIR(inode->i_mode)) {
3277 if (mode & MAY_WRITE)
3278 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3279 if (mode & MAY_EXEC)
3280 args.access |= NFS4_ACCESS_LOOKUP;
3281 } else {
3282 if (mode & MAY_WRITE)
3283 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3284 if (mode & MAY_EXEC)
3285 args.access |= NFS4_ACCESS_EXECUTE;
3286 }
c407d41a
TM		 3287
3288 res.fattr = nfs_alloc_fattr();
3289 if (res.fattr == NULL)
3290 return -ENOMEM;
3291
7c513058 3292 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3293 if (!status) {
6168f62c 3294 nfs_access_set_mask(entry, res.access);
c407d41a 3295 nfs_refresh_inode(inode, res.fattr);
1da177e4 3296 }
c407d41a 3297 nfs_free_fattr(res.fattr);
1da177e4
LT		 3298 return status;
3299}
3300
3301static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3302{
3303 struct nfs4_exception exception = { };
3304 int err;
3305 do {
c1578b76
TM		 3306 err = _nfs4_proc_access(inode, entry);
3307 trace_nfs4_access(inode, err);
3308 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3309 &exception);
3310 } while (exception.retry);
3311 return err;
3312}
3313
3314/*
3315 * TODO: For the time being, we don't try to get any attributes
3316 * along with any of the zero-copy operations READ, READDIR,
3317 * READLINK, WRITE.
3318 *
3319 * In the case of the first three, we want to put the GETATTR
3320 * after the read-type operation -- this is because it is hard
3321 * to predict the length of a GETATTR response in v4, and thus
3322 * align the READ data correctly. This means that the GETATTR
3323 * may end up partially falling into the page cache, and we should
3324 * shift it into the 'tail' of the xdr_buf before processing.
3325 * To do this efficiently, we need to know the total length
3326 * of data received, which doesn't seem to be available outside
3327 * of the RPC layer.
3328 *
3329 * In the case of WRITE, we also want to put the GETATTR after
3330 * the operation -- in this case because we want to make sure
140150db 3331 * we get the post-operation mtime and size.
1da177e4
LT		 3332 *
3333 * Both of these changes to the XDR layer would in fact be quite
3334 * minor, but I decided to leave them for a subsequent patch.
3335 */
3336static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3337 unsigned int pgbase, unsigned int pglen)
3338{
3339 struct nfs4_readlink args = {
3340 .fh = NFS_FH(inode),
3341 .pgbase = pgbase,
3342 .pglen = pglen,
3343 .pages = &page,
3344 };
f50c7000 3345 struct nfs4_readlink_res res;
1da177e4
LT		 3346 struct rpc_message msg = {
3347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3348 .rpc_argp = &args,
f50c7000 3349 .rpc_resp = &res,
1da177e4
LT		 3350 };
3351
7c513058 3352 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3353}
3354
3355static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3356 unsigned int pgbase, unsigned int pglen)
3357{
3358 struct nfs4_exception exception = { };
3359 int err;
3360 do {
c1578b76
TM		 3361 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3362 trace_nfs4_readlink(inode, err);
3363 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3364 &exception);
3365 } while (exception.retry);
3366 return err;
3367}
3368
1da177e4 3369/*
8867fe58 3370 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3371 */
1da177e4
LT		 3372static int
3373nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3374 int flags)
1da177e4 3375{
aa9c2669 3376 struct nfs4_label l, *ilabel = NULL;
8867fe58 3377 struct nfs_open_context *ctx;
1da177e4 3378 struct nfs4_state *state;
5bc2afc2 3379 int opened = 0;
1da177e4
LT		 3380 int status = 0;
3381
8867fe58
MS		 3382 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3383 if (IS_ERR(ctx))
3384 return PTR_ERR(ctx);
3385
aa9c2669
DQ		 3386 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3387
a8a5da99 3388 sattr->ia_mode &= ~current_umask();
5bc2afc2 3389 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3390 if (IS_ERR(state)) {
3391 status = PTR_ERR(state);
c0204fd2 3392 goto out;
1da177e4 3393 }
1da177e4 3394out:
aa9c2669 3395 nfs4_label_release_security(ilabel);
8867fe58 3396 put_nfs_open_context(ctx);
1da177e4
LT		 3397 return status;
3398}
3399
3400static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3401{
16e42959 3402 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3403 struct nfs_removeargs args = {
1da177e4 3404 .fh = NFS_FH(dir),
26fe5750 3405 .name = *name,
16e42959 3406 };
4fdc17b2 3407 struct nfs_removeres res = {
16e42959 3408 .server = server,
1da177e4 3409 };
1da177e4 3410 struct rpc_message msg = {
4fdc17b2
TM		 3411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3412 .rpc_argp = &args,
3413 .rpc_resp = &res,
1da177e4 3414 };
778d2817 3415 int status;
1da177e4 3416
7c513058 3417 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3418 if (status == 0)
16e42959 3419 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3420 return status;
3421}
3422
3423static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3424{
3425 struct nfs4_exception exception = { };
3426 int err;
3427 do {
078ea3df
TM		 3428 err = _nfs4_proc_remove(dir, name);
3429 trace_nfs4_remove(dir, name, err);
3430 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3431 &exception);
3432 } while (exception.retry);
3433 return err;
3434}
3435
e4eff1a6 3436static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3437{
e4eff1a6
TM		 3438 struct nfs_server *server = NFS_SERVER(dir);
3439 struct nfs_removeargs *args = msg->rpc_argp;
3440 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3441
e4eff1a6 3442 res->server = server;
1da177e4 3443 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3444 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3445
3446 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3447}
3448
34e137cc
BS		 3449static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3450{
d9afbd1b
TM		 3451 nfs4_setup_sequence(NFS_SERVER(data->dir),
3452 &data->args.seq_args,
3453 &data->res.seq_res,
3454 task);
1da177e4
LT		 3455}
3456
e4eff1a6 3457static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3458{
078ea3df
TM		 3459 struct nfs_unlinkdata *data = task->tk_calldata;
3460 struct nfs_removeres *res = &data->res;
e4eff1a6 3461
14516c3a
TM		 3462 if (!nfs4_sequence_done(task, &res->seq_res))
3463 return 0;
9e33bed5 3464 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3465 return 0;
3466 update_changeattr(dir, &res->cinfo);
e4eff1a6 3467 return 1;
1da177e4
LT		 3468}
3469
d3d4152a
JL		 3470static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3471{
3472 struct nfs_server *server = NFS_SERVER(dir);
3473 struct nfs_renameargs *arg = msg->rpc_argp;
3474 struct nfs_renameres *res = msg->rpc_resp;
3475
3476 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3477 res->server = server;
a9c92d6b 3478 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3479}
3480
c6bfa1a1
BS		 3481static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3482{
d9afbd1b
TM		 3483 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3484 &data->args.seq_args,
3485 &data->res.seq_res,
3486 task);
d3d4152a
JL		 3487}
3488
3489static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3490 struct inode *new_dir)
3491{
fbc6f7c2
TM		 3492 struct nfs_renamedata *data = task->tk_calldata;
3493 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3494
3495 if (!nfs4_sequence_done(task, &res->seq_res))
3496 return 0;
3497 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3498 return 0;
3499
3500 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3501 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3502 return 1;
3503}
3504
1da177e4
LT		 3505static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3506 struct inode *new_dir, struct qstr *new_name)
3507{
6caf2c82 3508 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3509 struct nfs_renameargs arg = {
1da177e4
LT		 3510 .old_dir = NFS_FH(old_dir),
3511 .new_dir = NFS_FH(new_dir),
3512 .old_name = old_name,
3513 .new_name = new_name,
6caf2c82 3514 };
e8582a8b 3515 struct nfs_renameres res = {
6caf2c82 3516 .server = server,
1da177e4 3517 };
1da177e4
LT		 3518 struct rpc_message msg = {
3519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3520 .rpc_argp = &arg,
3521 .rpc_resp = &res,
3522 };
011fff72 3523 int status = -ENOMEM;
14c43f76 3524
7c513058 3525 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3526 if (!status) {
3527 update_changeattr(old_dir, &res.old_cinfo);
3528 update_changeattr(new_dir, &res.new_cinfo);
3529 }
3530 return status;
3531}
3532
3533static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3534 struct inode *new_dir, struct qstr *new_name)
3535{
3536 struct nfs4_exception exception = { };
3537 int err;
3538 do {
fbc6f7c2
TM		 3539 err = _nfs4_proc_rename(old_dir, old_name,
3540 new_dir, new_name);
3541 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3542 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3543 &exception);
3544 } while (exception.retry);
3545 return err;
3546}
3547
3548static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3549{
91ba2eee 3550 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3551 struct nfs4_link_arg arg = {
3552 .fh = NFS_FH(inode),
3553 .dir_fh = NFS_FH(dir),
3554 .name = name,
91ba2eee
TM		 3555 .bitmask = server->attr_bitmask,
3556 };
91ba2eee
TM		 3557 struct nfs4_link_res res = {
3558 .server = server,
1775fd3e 3559 .label = NULL,
1da177e4 3560 };
1da177e4
LT		 3561 struct rpc_message msg = {
3562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3563 .rpc_argp = &arg,
91ba2eee 3564 .rpc_resp = &res,
1da177e4 3565 };
136f2627
TM		 3566 int status = -ENOMEM;
3567
3568 res.fattr = nfs_alloc_fattr();
778d2817 3569 if (res.fattr == NULL)
136f2627 3570 goto out;
1da177e4 3571
14c43f76
DQ		 3572 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3573 if (IS_ERR(res.label)) {
3574 status = PTR_ERR(res.label);
3575 goto out;
3576 }
aa9c2669 3577 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3578
7c513058 3579 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3580 if (!status) {
3581 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3582 status = nfs_post_op_update_inode(inode, res.fattr);
3583 if (!status)
3584 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3585 }
14c43f76
DQ		 3586
3587
3588 nfs4_label_free(res.label);
3589
136f2627 3590out:
136f2627 3591 nfs_free_fattr(res.fattr);
1da177e4
LT		 3592 return status;
3593}
3594
3595static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3596{
3597 struct nfs4_exception exception = { };
3598 int err;
3599 do {
3600 err = nfs4_handle_exception(NFS_SERVER(inode),
3601 _nfs4_proc_link(inode, dir, name),
3602 &exception);
3603 } while (exception.retry);
3604 return err;
3605}
3606
57dc9a57
TM		 3607struct nfs4_createdata {
3608 struct rpc_message msg;
3609 struct nfs4_create_arg arg;
3610 struct nfs4_create_res res;
3611 struct nfs_fh fh;
3612 struct nfs_fattr fattr;
1775fd3e 3613 struct nfs4_label *label;
57dc9a57
TM		 3614};
3615
3616static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3617 struct qstr *name, struct iattr *sattr, u32 ftype)
3618{
3619 struct nfs4_createdata *data;
3620
3621 data = kzalloc(sizeof(*data), GFP_KERNEL);
3622 if (data != NULL) {
3623 struct nfs_server *server = NFS_SERVER(dir);
3624
14c43f76
DQ		 3625 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3626 if (IS_ERR(data->label))
3627 goto out_free;
3628
57dc9a57
TM		 3629 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3630 data->msg.rpc_argp = &data->arg;
3631 data->msg.rpc_resp = &data->res;
3632 data->arg.dir_fh = NFS_FH(dir);
3633 data->arg.server = server;
3634 data->arg.name = name;
3635 data->arg.attrs = sattr;
3636 data->arg.ftype = ftype;
aa9c2669 3637 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3638 data->res.server = server;
3639 data->res.fh = &data->fh;
3640 data->res.fattr = &data->fattr;
1775fd3e 3641 data->res.label = data->label;
57dc9a57 3642 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3643 }
3644 return data;
14c43f76
DQ		 3645out_free:
3646 kfree(data);
3647 return NULL;
57dc9a57
TM		 3648}
3649
3650static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3651{
7c513058 3652 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3653 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3654 if (status == 0) {
3655 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3656 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3657 }
3658 return status;
3659}
3660
3661static void nfs4_free_createdata(struct nfs4_createdata *data)
3662{
14c43f76 3663 nfs4_label_free(data->label);
57dc9a57
TM		 3664 kfree(data);
3665}
3666
4f390c15 3667static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3668 struct page *page, unsigned int len, struct iattr *sattr,
3669 struct nfs4_label *label)
1da177e4 3670{
57dc9a57
TM		 3671 struct nfs4_createdata *data;
3672 int status = -ENAMETOOLONG;
1da177e4 3673
94a6d753 3674 if (len > NFS4_MAXPATHLEN)
57dc9a57 3675 goto out;
4f390c15 3676
57dc9a57
TM		 3677 status = -ENOMEM;
3678 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3679 if (data == NULL)
3680 goto out;
3681
3682 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3683 data->arg.u.symlink.pages = &page;
3684 data->arg.u.symlink.len = len;
1775fd3e 3685 data->arg.label = label;
1da177e4 3686
57dc9a57
TM		 3687 status = nfs4_do_create(dir, dentry, data);
3688
3689 nfs4_free_createdata(data);
3690out:
1da177e4
LT		 3691 return status;
3692}
3693
4f390c15 3694static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3695 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3696{
3697 struct nfs4_exception exception = { };
aa9c2669 3698 struct nfs4_label l, *label = NULL;
1da177e4 3699 int err;
aa9c2669
DQ		 3700
3701 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3702
1da177e4 3703 do {
078ea3df
TM		 3704 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3705 trace_nfs4_symlink(dir, &dentry->d_name, err);
3706 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3707 &exception);
3708 } while (exception.retry);
aa9c2669
DQ		 3709
3710 nfs4_label_release_security(label);
1da177e4
LT		 3711 return err;
3712}
3713
3714static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3715 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3716{
57dc9a57
TM		 3717 struct nfs4_createdata *data;
3718 int status = -ENOMEM;
1da177e4 3719
57dc9a57
TM		 3720 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3721 if (data == NULL)
3722 goto out;
3723
1775fd3e 3724 data->arg.label = label;
57dc9a57
TM		 3725 status = nfs4_do_create(dir, dentry, data);
3726
3727 nfs4_free_createdata(data);
3728out:
1da177e4
LT		 3729 return status;
3730}
3731
3732static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3733 struct iattr *sattr)
3734{
3735 struct nfs4_exception exception = { };
aa9c2669 3736 struct nfs4_label l, *label = NULL;
1da177e4 3737 int err;
a8a5da99 3738
aa9c2669
DQ		 3739 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3740
a8a5da99 3741 sattr->ia_mode &= ~current_umask();
1da177e4 3742 do {
078ea3df
TM		 3743 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3744 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3745 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3746 &exception);
3747 } while (exception.retry);
aa9c2669
DQ		 3748 nfs4_label_release_security(label);
3749
1da177e4
LT		 3750 return err;
3751}
3752
3753static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3754 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3755{
3756 struct inode *dir = dentry->d_inode;
3757 struct nfs4_readdir_arg args = {
3758 .fh = NFS_FH(dir),
56e4ebf8 3759 .pages = pages,
1da177e4
LT		 3760 .pgbase = 0,
3761 .count = count,
96d25e53 3762 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3763 .plus = plus,
1da177e4
LT		 3764 };
3765 struct nfs4_readdir_res res;
3766 struct rpc_message msg = {
3767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3768 .rpc_argp = &args,
3769 .rpc_resp = &res,
3770 .rpc_cred = cred,
3771 };
3772 int status;
3773
3110ff80 3774 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3775 dentry->d_parent->d_name.name,
3776 dentry->d_name.name,
3777 (unsigned long long)cookie);
c3f52af3 3778 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3779 res.pgbase = args.pgbase;
7c513058 3780 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3781 if (status >= 0) {
c3f52af3 3782 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3783 status += args.pgbase;
3784 }
c4812998
TM		 3785
3786 nfs_invalidate_atime(dir);
3787
3110ff80 3788 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3789 return status;
3790}
3791
3792static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3793 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3794{
3795 struct nfs4_exception exception = { };
3796 int err;
3797 do {
c1578b76
TM		 3798 err = _nfs4_proc_readdir(dentry, cred, cookie,
3799 pages, count, plus);
3800 trace_nfs4_readdir(dentry->d_inode, err);
3801 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3802 &exception);
3803 } while (exception.retry);
3804 return err;
3805}
3806
3807static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3808 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3809{
57dc9a57
TM		 3810 struct nfs4_createdata *data;
3811 int mode = sattr->ia_mode;
3812 int status = -ENOMEM;
1da177e4 3813
57dc9a57
TM		 3814 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3815 if (data == NULL)
3816 goto out;
3817
1da177e4 3818 if (S_ISFIFO(mode))
57dc9a57 3819 data->arg.ftype = NF4FIFO;
1da177e4 3820 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3821 data->arg.ftype = NF4BLK;
3822 data->arg.u.device.specdata1 = MAJOR(rdev);
3823 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3824 }
3825 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3826 data->arg.ftype = NF4CHR;
3827 data->arg.u.device.specdata1 = MAJOR(rdev);
3828 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3829 } else if (!S_ISSOCK(mode)) {
3830 status = -EINVAL;
3831 goto out_free;
1da177e4 3832 }
1775fd3e 3833
aa9c2669 3834 data->arg.label = label;
57dc9a57 3835 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3836out_free:
57dc9a57
TM		 3837 nfs4_free_createdata(data);
3838out:
1da177e4
LT		 3839 return status;
3840}
3841
3842static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3843 struct iattr *sattr, dev_t rdev)
3844{
3845 struct nfs4_exception exception = { };
aa9c2669 3846 struct nfs4_label l, *label = NULL;
1da177e4 3847 int err;
a8a5da99 3848
aa9c2669
DQ		 3849 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3850
a8a5da99 3851 sattr->ia_mode &= ~current_umask();
1da177e4 3852 do {
078ea3df
TM		 3853 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3854 trace_nfs4_mknod(dir, &dentry->d_name, err);
3855 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3856 &exception);
3857 } while (exception.retry);
aa9c2669
DQ		 3858
3859 nfs4_label_release_security(label);
3860
1da177e4
LT		 3861 return err;
3862}
3863
3864static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3865 struct nfs_fsstat *fsstat)
3866{
3867 struct nfs4_statfs_arg args = {
3868 .fh = fhandle,
3869 .bitmask = server->attr_bitmask,
3870 };
24ad148a
BH		 3871 struct nfs4_statfs_res res = {
3872 .fsstat = fsstat,
3873 };
1da177e4
LT		 3874 struct rpc_message msg = {
3875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3876 .rpc_argp = &args,
24ad148a 3877 .rpc_resp = &res,
1da177e4
LT		 3878 };
3879
0e574af1 3880 nfs_fattr_init(fsstat->fattr);
7c513058 3881 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3882}
3883
3884static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3885{
3886 struct nfs4_exception exception = { };
3887 int err;
3888 do {
3889 err = nfs4_handle_exception(server,
3890 _nfs4_proc_statfs(server, fhandle, fsstat),
3891 &exception);
3892 } while (exception.retry);
3893 return err;
3894}
3895
3896static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3897 struct nfs_fsinfo *fsinfo)
3898{
3899 struct nfs4_fsinfo_arg args = {
3900 .fh = fhandle,
3901 .bitmask = server->attr_bitmask,
3902 };
3dda5e43
BH		 3903 struct nfs4_fsinfo_res res = {
3904 .fsinfo = fsinfo,
3905 };
1da177e4
LT		 3906 struct rpc_message msg = {
3907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3908 .rpc_argp = &args,
3dda5e43 3909 .rpc_resp = &res,
1da177e4
LT		 3910 };
3911
7c513058 3912 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3913}
3914
3915static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3916{
3917 struct nfs4_exception exception = { };
83ca7f5a 3918 unsigned long now = jiffies;
1da177e4
LT		 3919 int err;
3920
3921 do {
83ca7f5a 3922 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3923 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3924 if (err == 0) {
3925 struct nfs_client *clp = server->nfs_client;
3926
3927 spin_lock(&clp->cl_lock);
3928 clp->cl_lease_time = fsinfo->lease_time * HZ;
3929 clp->cl_last_renewal = now;
3930 spin_unlock(&clp->cl_lock);
3931 break;
3932 }
3933 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3934 } while (exception.retry);
3935 return err;
3936}
3937
3938static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3939{
e38eb650
BS		 3940 int error;
3941
0e574af1 3942 nfs_fattr_init(fsinfo->fattr);
e38eb650 3943 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3944 if (error == 0) {
3945 /* block layout checks this! */
3946 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3947 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3948 }
e38eb650
BS		 3949
3950 return error;
1da177e4
LT		 3951}
3952
3953static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3954 struct nfs_pathconf *pathconf)
3955{
3956 struct nfs4_pathconf_arg args = {
3957 .fh = fhandle,
3958 .bitmask = server->attr_bitmask,
3959 };
d45b2989
BH		 3960 struct nfs4_pathconf_res res = {
3961 .pathconf = pathconf,
3962 };
1da177e4
LT		 3963 struct rpc_message msg = {
3964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3965 .rpc_argp = &args,
d45b2989 3966 .rpc_resp = &res,
1da177e4
LT		 3967 };
3968
3969 /* None of the pathconf attributes are mandatory to implement */
3970 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3971 memset(pathconf, 0, sizeof(*pathconf));
3972 return 0;
3973 }
3974
0e574af1 3975 nfs_fattr_init(pathconf->fattr);
7c513058 3976 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3977}
3978
3979static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3980 struct nfs_pathconf *pathconf)
3981{
3982 struct nfs4_exception exception = { };
3983 int err;
3984
3985 do {
3986 err = nfs4_handle_exception(server,
3987 _nfs4_proc_pathconf(server, fhandle, pathconf),
3988 &exception);
3989 } while (exception.retry);
3990 return err;
3991}
3992
5521abfd 3993int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3994 const struct nfs_open_context *ctx,
3995 const struct nfs_lock_context *l_ctx,
3996 fmode_t fmode)
3997{
3998 const struct nfs_lockowner *lockowner = NULL;
3999
4000 if (l_ctx != NULL)
4001 lockowner = &l_ctx->lockowner;
5521abfd 4002 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4003}
4004EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4005
5521abfd
TM		 4006static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4007 const struct nfs_open_context *ctx,
4008 const struct nfs_lock_context *l_ctx,
4009 fmode_t fmode)
4010{
4011 nfs4_stateid current_stateid;
4012
4013 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
4014 return false;
4015 return nfs4_stateid_match(stateid, &current_stateid);
4016}
4017
4018static bool nfs4_error_stateid_expired(int err)
4019{
4020 switch (err) {
4021 case -NFS4ERR_DELEG_REVOKED:
4022 case -NFS4ERR_ADMIN_REVOKED:
4023 case -NFS4ERR_BAD_STATEID:
4024 case -NFS4ERR_STALE_STATEID:
4025 case -NFS4ERR_OLD_STATEID:
4026 case -NFS4ERR_OPENMODE:
4027 case -NFS4ERR_EXPIRED:
4028 return true;
4029 }
4030 return false;
4031}
4032
d20581aa
BH		 4033void __nfs4_read_done_cb(struct nfs_read_data *data)
4034{
cd841605 4035 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4036}
4037
cbdabc7f 4038static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4039{
cd841605 4040 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4041
cc668ab3 4042 trace_nfs4_read(data, task->tk_status);
9e33bed5 4043 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4044 rpc_restart_call_prepare(task);
ec06c096 4045 return -EAGAIN;
1da177e4 4046 }
8850df99 4047
d20581aa 4048 __nfs4_read_done_cb(data);
1da177e4 4049 if (task->tk_status > 0)
ec06c096
TM		 4050 renew_lease(server, data->timestamp);
4051 return 0;
1da177e4
LT		 4052}
4053
5521abfd
TM		 4054static bool nfs4_read_stateid_changed(struct rpc_task *task,
4055 struct nfs_readargs *args)
4056{
4057
4058 if (!nfs4_error_stateid_expired(task->tk_status) ||
4059 nfs4_stateid_is_current(&args->stateid,
4060 args->context,
4061 args->lock_context,
4062 FMODE_READ))
4063 return false;
4064 rpc_restart_call_prepare(task);
4065 return true;
4066}
4067
cbdabc7f
AA		 4068static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4069{
4070
4071 dprintk("--> %s\n", __func__);
4072
4073 if (!nfs4_sequence_done(task, &data->res.seq_res))
4074 return -EAGAIN;
5521abfd
TM		 4075 if (nfs4_read_stateid_changed(task, &data->args))
4076 return -EAGAIN;
d20581aa
BH		 4077 return data->read_done_cb ? data->read_done_cb(task, data) :
4078 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4079}
4080
bdc7f021 4081static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4082{
1da177e4 4083 data->timestamp = jiffies;
cbdabc7f 4084 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4085 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4086 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4087}
4088
ef1820f9 4089static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4090{
9b206149 4091 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4092 &data->args.seq_args,
4093 &data->res.seq_res,
9b206149 4094 task))
ef1820f9
N		 4095 return 0;
4096 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4097 data->args.lock_context, FMODE_READ) == -EIO)
4098 return -EIO;
4099 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4100 return -EIO;
4101 return 0;
1da177e4
LT		 4102}
4103
b029bc9b 4104static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4105{
cd841605 4106 struct inode *inode = data->header->inode;
1da177e4 4107
cc668ab3 4108 trace_nfs4_write(data, task->tk_status);
9e33bed5 4109 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4110 rpc_restart_call_prepare(task);
788e7a89 4111 return -EAGAIN;
1da177e4 4112 }
4f9838c7 4113 if (task->tk_status >= 0) {
1da177e4 4114 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4115 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4116 }
788e7a89 4117 return 0;
1da177e4
LT		 4118}
4119
5521abfd
TM		 4120static bool nfs4_write_stateid_changed(struct rpc_task *task,
4121 struct nfs_writeargs *args)
4122{
4123
4124 if (!nfs4_error_stateid_expired(task->tk_status) ||
4125 nfs4_stateid_is_current(&args->stateid,
4126 args->context,
4127 args->lock_context,
4128 FMODE_WRITE))
4129 return false;
4130 rpc_restart_call_prepare(task);
4131 return true;
4132}
4133
b029bc9b
FI		 4134static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4135{
4136 if (!nfs4_sequence_done(task, &data->res.seq_res))
4137 return -EAGAIN;
5521abfd
TM		 4138 if (nfs4_write_stateid_changed(task, &data->args))
4139 return -EAGAIN;
d20581aa
BH		 4140 return data->write_done_cb ? data->write_done_cb(task, data) :
4141 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4142}
4143
5a37f851
TM		 4144static
4145bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4146{
5a37f851
TM		 4147 const struct nfs_pgio_header *hdr = data->header;
4148
4149 /* Don't request attributes for pNFS or O_DIRECT writes */
4150 if (data->ds_clp != NULL || hdr->dreq != NULL)
4151 return false;
4152 /* Otherwise, request attributes if and only if we don't hold
4153 * a delegation
4154 */
011e2a7f 4155 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4156}
a69aef14 4157
bdc7f021 4158static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4159{
cd841605 4160 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4161
5a37f851 4162 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4163 data->args.bitmask = NULL;
4164 data->res.fattr = NULL;
4165 } else
4166 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4167
b029bc9b
FI		 4168 if (!data->write_done_cb)
4169 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4170 data->res.server = server;
1da177e4
LT		 4171 data->timestamp = jiffies;
4172
bdc7f021 4173 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4174 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4175}
4176
ef1820f9 4177static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4178{
9b206149 4179 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4180 &data->args.seq_args,
4181 &data->res.seq_res,
9b206149 4182 task))
ef1820f9
N		 4183 return 0;
4184 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4185 data->args.lock_context, FMODE_WRITE) == -EIO)
4186 return -EIO;
4187 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4188 return -EIO;
4189 return 0;
1da177e4
LT		 4190}
4191
0b7c0153 4192static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4193{
d9afbd1b
TM		 4194 nfs4_setup_sequence(NFS_SERVER(data->inode),
4195 &data->args.seq_args,
4196 &data->res.seq_res,
4197 task);
1da177e4
LT		 4198}
4199
0b7c0153 4200static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4201{
1da177e4 4202 struct inode *inode = data->inode;
14516c3a 4203
cc668ab3 4204 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4205 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4206 rpc_restart_call_prepare(task);
788e7a89 4207 return -EAGAIN;
1da177e4 4208 }
788e7a89 4209 return 0;
1da177e4
LT		 4210}
4211
0b7c0153 4212static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4213{
4214 if (!nfs4_sequence_done(task, &data->res.seq_res))
4215 return -EAGAIN;
0b7c0153 4216 return data->commit_done_cb(task, data);
5f452431
FI		 4217}
4218
0b7c0153 4219static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4220{
788e7a89 4221 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4222
0b7c0153
FI		 4223 if (data->commit_done_cb == NULL)
4224 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4225 data->res.server = server;
bdc7f021 4226 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4227 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4228}
4229
9bc4e3ca
CL		 4230struct nfs4_renewdata {
4231 struct nfs_client *client;
4232 unsigned long timestamp;
4233};
4234
1da177e4
LT		 4235/*
4236 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4237 * standalone procedure for queueing an asynchronous RENEW.
4238 */
9bc4e3ca 4239static void nfs4_renew_release(void *calldata)
dc96aef9 4240{
9bc4e3ca
CL		 4241 struct nfs4_renewdata *data = calldata;
4242 struct nfs_client *clp = data->client;
dc96aef9 4243
0851de06
AB		 4244 if (atomic_read(&clp->cl_count) > 1)
4245 nfs4_schedule_state_renewal(clp);
4246 nfs_put_client(clp);
9bc4e3ca 4247 kfree(data);
dc96aef9
AB		 4248}
4249
9bc4e3ca 4250static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4251{
9bc4e3ca
CL		 4252 struct nfs4_renewdata *data = calldata;
4253 struct nfs_client *clp = data->client;
4254 unsigned long timestamp = data->timestamp;
1da177e4 4255
c6d01c6f 4256 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4257 switch (task->tk_status) {
4258 case 0:
4259 break;
4260 case -NFS4ERR_LEASE_MOVED:
4261 nfs4_schedule_lease_moved_recovery(clp);
4262 break;
4263 default:
95baa25c 4264 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4265 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4266 return;
4267 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4268 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4269 return;
4270 }
4271 nfs4_schedule_path_down_recovery(clp);
1da177e4 4272 }
452e9352 4273 do_renew_lease(clp, timestamp);
1da177e4
LT		 4274}
4275
963d8fe5
TM		 4276static const struct rpc_call_ops nfs4_renew_ops = {
4277 .rpc_call_done = nfs4_renew_done,
dc96aef9 4278 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4279};
4280
2f60ea6b 4281static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4282{
4283 struct rpc_message msg = {
4284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4285 .rpc_argp = clp,
b4454fe1 4286 .rpc_cred = cred,
1da177e4 4287 };
9bc4e3ca 4288 struct nfs4_renewdata *data;
1da177e4 4289
2f60ea6b
TM		 4290 if (renew_flags == 0)
4291 return 0;
0851de06
AB		 4292 if (!atomic_inc_not_zero(&clp->cl_count))
4293 return -EIO;
b569ad34 4294 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4295 if (data == NULL)
4296 return -ENOMEM;
4297 data->client = clp;
4298 data->timestamp = jiffies;
bc7a05ca 4299 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4300 &nfs4_renew_ops, data);
1da177e4
LT		 4301}
4302
8534d4ec 4303static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4304{
4305 struct rpc_message msg = {
4306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4307 .rpc_argp = clp,
b4454fe1 4308 .rpc_cred = cred,
1da177e4
LT		 4309 };
4310 unsigned long now = jiffies;
4311 int status;
4312
bc7a05ca 4313 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4314 if (status < 0)
4315 return status;
452e9352 4316 do_renew_lease(clp, now);
1da177e4
LT		 4317 return 0;
4318}
4319
aa1870af
BF		 4320static inline int nfs4_server_supports_acls(struct nfs_server *server)
4321{
4322 return (server->caps & NFS_CAP_ACLS)
4323 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4324 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4325}
4326
21f498c2
TM		 4327/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4328 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4329 * the stack.
4330 */
21f498c2 4331#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4332
e9e3d724
NH		 4333static int buf_to_pages_noslab(const void *buf, size_t buflen,
4334 struct page **pages, unsigned int *pgbase)
4335{
4336 struct page *newpage, **spages;
4337 int rc = 0;
4338 size_t len;
4339 spages = pages;
4340
4341 do {
21f498c2 4342 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4343 newpage = alloc_page(GFP_KERNEL);
4344
4345 if (newpage == NULL)
4346 goto unwind;
4347 memcpy(page_address(newpage), buf, len);
4348 buf += len;
4349 buflen -= len;
4350 *pages++ = newpage;
4351 rc++;
4352 } while (buflen != 0);
4353
4354 return rc;
4355
4356unwind:
4357 for(; rc > 0; rc--)
4358 __free_page(spages[rc-1]);
4359 return -ENOMEM;
4360}
4361
e50a1c2e
BF		 4362struct nfs4_cached_acl {
4363 int cached;
4364 size_t len;
3e9d4154 4365 char data[0];
e50a1c2e
BF		 4366};
4367
4368static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4369{
4370 struct nfs_inode *nfsi = NFS_I(inode);
4371
4372 spin_lock(&inode->i_lock);
4373 kfree(nfsi->nfs4_acl);
4374 nfsi->nfs4_acl = acl;
4375 spin_unlock(&inode->i_lock);
4376}
4377
4378static void nfs4_zap_acl_attr(struct inode *inode)
4379{
4380 nfs4_set_cached_acl(inode, NULL);
4381}
4382
4383static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4384{
4385 struct nfs_inode *nfsi = NFS_I(inode);
4386 struct nfs4_cached_acl *acl;
4387 int ret = -ENOENT;
4388
4389 spin_lock(&inode->i_lock);
4390 acl = nfsi->nfs4_acl;
4391 if (acl == NULL)
4392 goto out;
4393 if (buf == NULL) /* user is just asking for length */
4394 goto out_len;
4395 if (acl->cached == 0)
4396 goto out;
4397 ret = -ERANGE; /* see getxattr(2) man page */
4398 if (acl->len > buflen)
4399 goto out;
4400 memcpy(buf, acl->data, acl->len);
4401out_len:
4402 ret = acl->len;
4403out:
4404 spin_unlock(&inode->i_lock);
4405 return ret;
4406}
4407
5794d21e 4408static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4409{
4410 struct nfs4_cached_acl *acl;
b291f1b1 4411 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4412
1f1ea6c2 4413 if (buflen <= PAGE_SIZE) {
b291f1b1 4414 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4415 if (acl == NULL)
4416 goto out;
4417 acl->cached = 1;
5794d21e 4418 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4419 } else {
4420 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4421 if (acl == NULL)
4422 goto out;
4423 acl->cached = 0;
4424 }
4425 acl->len = acl_len;
4426out:
4427 nfs4_set_cached_acl(inode, acl);
4428}
4429
bf118a34
AA		 4430/*
4431 * The getxattr API returns the required buffer length when called with a
4432 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4433 * the required buf. On a NULL buf, we send a page of data to the server
4434 * guessing that the ACL request can be serviced by a page. If so, we cache
4435 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4436 * the cache. If not so, we throw away the page, and cache the required
4437 * length. The next getxattr call will then produce another round trip to
4438 * the server, this time with the input buf of the required size.
4439 */
16b4289c 4440static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4441{
bf118a34 4442 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4443 struct nfs_getaclargs args = {
4444 .fh = NFS_FH(inode),
4445 .acl_pages = pages,
4446 .acl_len = buflen,
4447 };
663c79b3
BH		 4448 struct nfs_getaclres res = {
4449 .acl_len = buflen,
4450 };
aa1870af
BF		 4451 struct rpc_message msg = {
4452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4453 .rpc_argp = &args,
663c79b3 4454 .rpc_resp = &res,
aa1870af 4455 };
21f498c2
TM		 4456 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4457 int ret = -ENOMEM, i;
aa1870af 4458
bf118a34
AA		 4459 /* As long as we're doing a round trip to the server anyway,
4460 * let's be prepared for a page of acl data. */
4461 if (npages == 0)
4462 npages = 1;
21f498c2
TM		 4463 if (npages > ARRAY_SIZE(pages))
4464 return -ERANGE;
5a006899 4465
bf118a34
AA		 4466 for (i = 0; i < npages; i++) {
4467 pages[i] = alloc_page(GFP_KERNEL);
4468 if (!pages[i])
4469 goto out_free;
e50a1c2e 4470 }
5a006899
SP		 4471
4472 /* for decoding across pages */
4473 res.acl_scratch = alloc_page(GFP_KERNEL);
4474 if (!res.acl_scratch)
4475 goto out_free;
4476
bf118a34
AA		 4477 args.acl_len = npages * PAGE_SIZE;
4478 args.acl_pgbase = 0;
5a006899 4479
de040bec 4480 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4481 __func__, buf, buflen, npages, args.acl_len);
4482 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4483 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4484 if (ret)
4485 goto out_free;
bf118a34 4486
1f1ea6c2
TM		 4487 /* Handle the case where the passed-in buffer is too short */
4488 if (res.acl_flags & NFS4_ACL_TRUNC) {
4489 /* Did the user only issue a request for the acl length? */
4490 if (buf == NULL)
4491 goto out_ok;
e50a1c2e 4492 ret = -ERANGE;
1f1ea6c2 4493 goto out_free;
e50a1c2e 4494 }
1f1ea6c2 4495 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4496 if (buf) {
4497 if (res.acl_len > buflen) {
4498 ret = -ERANGE;
4499 goto out_free;
4500 }
1f1ea6c2 4501 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4502 }
1f1ea6c2
TM		 4503out_ok:
4504 ret = res.acl_len;
e50a1c2e 4505out_free:
bf118a34
AA		 4506 for (i = 0; i < npages; i++)
4507 if (pages[i])
4508 __free_page(pages[i]);
331818f1
TM		 4509 if (res.acl_scratch)
4510 __free_page(res.acl_scratch);
aa1870af
BF		 4511 return ret;
4512}
4513
16b4289c
TM		 4514static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4515{
4516 struct nfs4_exception exception = { };
4517 ssize_t ret;
4518 do {
4519 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4520 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4521 if (ret >= 0)
4522 break;
4523 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4524 } while (exception.retry);
4525 return ret;
4526}
4527
e50a1c2e
BF		 4528static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4529{
4530 struct nfs_server *server = NFS_SERVER(inode);
4531 int ret;
4532
4533 if (!nfs4_server_supports_acls(server))
4534 return -EOPNOTSUPP;
4535 ret = nfs_revalidate_inode(server, inode);
4536 if (ret < 0)
4537 return ret;
08a22b39
AK		 4538 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4539 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4540 ret = nfs4_read_cached_acl(inode, buf, buflen);
4541 if (ret != -ENOENT)
bf118a34
AA		 4542 /* -ENOENT is returned if there is no ACL or if there is an ACL
4543 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4544 return ret;
4545 return nfs4_get_acl_uncached(inode, buf, buflen);
4546}
4547
16b4289c 4548static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4549{
4550 struct nfs_server *server = NFS_SERVER(inode);
4551 struct page *pages[NFS4ACL_MAXPAGES];
4552 struct nfs_setaclargs arg = {
4553 .fh = NFS_FH(inode),
4554 .acl_pages = pages,
4555 .acl_len = buflen,
4556 };
73c403a9 4557 struct nfs_setaclres res;
4b580ee3
BF		 4558 struct rpc_message msg = {
4559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4560 .rpc_argp = &arg,
73c403a9 4561 .rpc_resp = &res,
4b580ee3 4562 };
21f498c2 4563 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4564 int ret, i;
4b580ee3
BF		 4565
4566 if (!nfs4_server_supports_acls(server))
4567 return -EOPNOTSUPP;
21f498c2
TM		 4568 if (npages > ARRAY_SIZE(pages))
4569 return -ERANGE;
e9e3d724
NH		 4570 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4571 if (i < 0)
4572 return i;
57ec14c5 4573 nfs4_inode_return_delegation(inode);
7c513058 4574 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4575
4576 /*
4577 * Free each page after tx, so the only ref left is
4578 * held by the network stack
4579 */
4580 for (; i > 0; i--)
4581 put_page(pages[i-1]);
4582
08a22b39
AK		 4583 /*
4584 * Acl update can result in inode attribute update.
4585 * so mark the attribute cache invalid.
4586 */
4587 spin_lock(&inode->i_lock);
4588 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4589 spin_unlock(&inode->i_lock);
f41f7418
TM		 4590 nfs_access_zap_cache(inode);
4591 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4592 return ret;
4593}
4594
16b4289c
TM		 4595static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4596{
4597 struct nfs4_exception exception = { };
4598 int err;
4599 do {
c1578b76
TM		 4600 err = __nfs4_proc_set_acl(inode, buf, buflen);
4601 trace_nfs4_set_acl(inode, err);
4602 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4603 &exception);
4604 } while (exception.retry);
4605 return err;
4606}
4607
aa9c2669
DQ		 4608#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4609static int _nfs4_get_security_label(struct inode *inode, void *buf,
4610 size_t buflen)
4611{
4612 struct nfs_server *server = NFS_SERVER(inode);
4613 struct nfs_fattr fattr;
4614 struct nfs4_label label = {0, 0, buflen, buf};
4615
4616 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4617 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4618 .fh = NFS_FH(inode),
4619 .bitmask = bitmask,
4620 };
4621 struct nfs4_getattr_res res = {
4622 .fattr = &fattr,
4623 .label = &label,
4624 .server = server,
4625 };
4626 struct rpc_message msg = {
4627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4628 .rpc_argp = &arg,
aa9c2669
DQ		 4629 .rpc_resp = &res,
4630 };
4631 int ret;
4632
4633 nfs_fattr_init(&fattr);
4634
fcb63a9b 4635 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4636 if (ret)
4637 return ret;
4638 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4639 return -ENOENT;
4640 if (buflen < label.len)
4641 return -ERANGE;
4642 return 0;
4643}
4644
4645static int nfs4_get_security_label(struct inode *inode, void *buf,
4646 size_t buflen)
4647{
4648 struct nfs4_exception exception = { };
4649 int err;
4650
4651 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4652 return -EOPNOTSUPP;
4653
4654 do {
c1578b76
TM		 4655 err = _nfs4_get_security_label(inode, buf, buflen);
4656 trace_nfs4_get_security_label(inode, err);
4657 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4658 &exception);
4659 } while (exception.retry);
4660 return err;
4661}
4662
4663static int _nfs4_do_set_security_label(struct inode *inode,
4664 struct nfs4_label *ilabel,
4665 struct nfs_fattr *fattr,
4666 struct nfs4_label *olabel)
4667{
4668
4669 struct iattr sattr = {0};
4670 struct nfs_server *server = NFS_SERVER(inode);
4671 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4672 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4673 .fh = NFS_FH(inode),
4674 .iap = &sattr,
4675 .server = server,
4676 .bitmask = bitmask,
4677 .label = ilabel,
4678 };
4679 struct nfs_setattrres res = {
4680 .fattr = fattr,
4681 .label = olabel,
4682 .server = server,
4683 };
4684 struct rpc_message msg = {
4685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4686 .rpc_argp = &arg,
aa9c2669
DQ		 4687 .rpc_resp = &res,
4688 };
4689 int status;
4690
12207f69 4691 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4692
12207f69 4693 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4694 if (status)
4695 dprintk("%s failed: %d\n", __func__, status);
4696
4697 return status;
4698}
4699
4700static int nfs4_do_set_security_label(struct inode *inode,
4701 struct nfs4_label *ilabel,
4702 struct nfs_fattr *fattr,
4703 struct nfs4_label *olabel)
4704{
4705 struct nfs4_exception exception = { };
4706 int err;
4707
4708 do {
c1578b76
TM		 4709 err = _nfs4_do_set_security_label(inode, ilabel,
4710 fattr, olabel);
4711 trace_nfs4_set_security_label(inode, err);
4712 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4713 &exception);
4714 } while (exception.retry);
4715 return err;
4716}
4717
4718static int
4719nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4720{
4721 struct nfs4_label ilabel, *olabel = NULL;
4722 struct nfs_fattr fattr;
4723 struct rpc_cred *cred;
4724 struct inode *inode = dentry->d_inode;
4725 int status;
4726
4727 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4728 return -EOPNOTSUPP;
4729
4730 nfs_fattr_init(&fattr);
4731
4732 ilabel.pi = 0;
4733 ilabel.lfs = 0;
4734 ilabel.label = (char *)buf;
4735 ilabel.len = buflen;
4736
4737 cred = rpc_lookup_cred();
4738 if (IS_ERR(cred))
4739 return PTR_ERR(cred);
4740
4741 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4742 if (IS_ERR(olabel)) {
4743 status = -PTR_ERR(olabel);
4744 goto out;
4745 }
4746
4747 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4748 if (status == 0)
4749 nfs_setsecurity(inode, &fattr, olabel);
4750
4751 nfs4_label_free(olabel);
4752out:
4753 put_rpccred(cred);
4754 return status;
4755}
4756#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4757
4758
1da177e4 4759static int
aa5190d0 4760nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4761{
aa5190d0
TM		 4762 struct nfs_client *clp = server->nfs_client;
4763
4764 if (task->tk_status >= 0)
1da177e4
LT		 4765 return 0;
4766 switch(task->tk_status) {
a1d0b5ee 4767 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4768 case -NFS4ERR_ADMIN_REVOKED:
4769 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4770 if (state == NULL)
4771 break;
4772 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4773 case -NFS4ERR_OPENMODE:
4774 if (state == NULL)
4775 break;
5d422301 4776 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4777 goto recovery_failed;
0400a6b0 4778 goto wait_on_recovery;
0ced63d1 4779 case -NFS4ERR_EXPIRED:
5d422301
TM		 4780 if (state != NULL) {
4781 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4782 goto recovery_failed;
5d422301 4783 }
1da177e4 4784 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4785 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4786 nfs4_schedule_lease_recovery(clp);
4787 goto wait_on_recovery;
519ae255
CL		 4788 case -NFS4ERR_MOVED:
4789 if (nfs4_schedule_migration_recovery(server) < 0)
4790 goto recovery_failed;
4791 goto wait_on_recovery;
8ef2f8d4
CL		 4792 case -NFS4ERR_LEASE_MOVED:
4793 nfs4_schedule_lease_moved_recovery(clp);
4794 goto wait_on_recovery;
4745e315
AA		 4795#if defined(CONFIG_NFS_V4_1)
4796 case -NFS4ERR_BADSESSION:
4797 case -NFS4ERR_BADSLOT:
4798 case -NFS4ERR_BAD_HIGH_SLOT:
4799 case -NFS4ERR_DEADSESSION:
4800 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4801 case -NFS4ERR_SEQ_FALSE_RETRY:
4802 case -NFS4ERR_SEQ_MISORDERED:
4803 dprintk("%s ERROR %d, Reset session\n", __func__,
4804 task->tk_status);
9f594791 4805 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4806 goto wait_on_recovery;
4745e315 4807#endif /* CONFIG_NFS_V4_1 */
1da177e4 4808 case -NFS4ERR_DELAY:
aa5190d0 4809 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4810 case -NFS4ERR_GRACE:
1da177e4 4811 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4812 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4813 case -NFS4ERR_OLD_STATEID:
f1478c13 4814 goto restart_call;
1da177e4
LT		 4815 }
4816 task->tk_status = nfs4_map_errors(task->tk_status);
4817 return 0;
9f51a78e 4818recovery_failed:
5d422301
TM		 4819 task->tk_status = -EIO;
4820 return 0;
0400a6b0 4821wait_on_recovery:
a2c0b9e2 4822 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4823 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4824 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4825 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4826 goto recovery_failed;
f1478c13 4827restart_call:
a2c0b9e2
TM		 4828 task->tk_status = 0;
4829 return -EAGAIN;
1da177e4
LT		 4830}
4831
f092075d
CL		 4832static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4833 nfs4_verifier *bootverf)
cd93710e
CL		 4834{
4835 __be32 verf[2];
4836
2c820d9a
CL		 4837 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4838 /* An impossible timestamp guarantees this value
4839 * will never match a generated boot time. */
4840 verf[0] = 0;
17f26b12 4841 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4842 } else {
f092075d 4843 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4844 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4845 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4846 }
cd93710e
CL		 4847 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4848}
4849
e984a55a
CL		 4850static unsigned int
4851nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4852 char *buf, size_t len)
4853{
4854 unsigned int result;
4855
4856 rcu_read_lock();
4857 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4858 clp->cl_ipaddr,
4859 rpc_peeraddr2str(clp->cl_rpcclient,
4860 RPC_DISPLAY_ADDR),
4861 rpc_peeraddr2str(clp->cl_rpcclient,
4862 RPC_DISPLAY_PROTO));
4863 rcu_read_unlock();
4864 return result;
4865}
4866
4867static unsigned int
4868nfs4_init_uniform_client_string(const struct nfs_client *clp,
4869 char *buf, size_t len)
4870{
55b59293 4871 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4872
4873 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4874 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4875 clp->rpc_ops->version,
4876 clp->cl_minorversion,
4877 nfs4_client_id_uniquifier,
4878 nodename);
e984a55a
CL		 4879 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4880 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4881 nodename);
e984a55a
CL		 4882}
4883
6bbb4ae8
CL		 4884/**
4885 * nfs4_proc_setclientid - Negotiate client ID
4886 * @clp: state data structure
4887 * @program: RPC program for NFSv4 callback service
4888 * @port: IP port number for NFS4 callback service
4889 * @cred: RPC credential to use for this call
4890 * @res: where to place the result
4891 *
4892 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4893 */
bb8b27e5
TM		 4894int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4895 unsigned short port, struct rpc_cred *cred,
4896 struct nfs4_setclientid_res *res)
1da177e4
LT		 4897{
4898 nfs4_verifier sc_verifier;
4899 struct nfs4_setclientid setclientid = {
4900 .sc_verifier = &sc_verifier,
4901 .sc_prog = program,
f4eecd5d 4902 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4903 };
4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4906 .rpc_argp = &setclientid,
bb8b27e5 4907 .rpc_resp = res,
286d7d6a 4908 .rpc_cred = cred,
1da177e4 4909 };
6bbb4ae8 4910 int status;
1da177e4 4911
de734831 4912 /* nfs_client_id4 */
f092075d 4913 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4914 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4915 setclientid.sc_name_len =
4916 nfs4_init_uniform_client_string(clp,
4917 setclientid.sc_name,
4918 sizeof(setclientid.sc_name));
4919 else
4920 setclientid.sc_name_len =
4921 nfs4_init_nonuniform_client_string(clp,
4922 setclientid.sc_name,
4923 sizeof(setclientid.sc_name));
de734831 4924 /* cb_client4 */
e984a55a 4925 rcu_read_lock();
de734831 4926 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4927 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4928 rpc_peeraddr2str(clp->cl_rpcclient,
4929 RPC_DISPLAY_NETID));
de734831
CL		 4930 rcu_read_unlock();
4931 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4932 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4933 clp->cl_ipaddr, port >> 8, port & 255);
4934
6bbb4ae8
CL		 4935 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4936 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4937 setclientid.sc_name_len, setclientid.sc_name);
4938 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4939 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4940 dprintk("NFS reply setclientid: %d\n", status);
4941 return status;
1da177e4
LT		 4942}
4943
6bbb4ae8
CL		 4944/**
4945 * nfs4_proc_setclientid_confirm - Confirm client ID
4946 * @clp: state data structure
4947 * @res: result of a previous SETCLIENTID
4948 * @cred: RPC credential to use for this call
4949 *
4950 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4951 */
fd954ae1 4952int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4953 struct nfs4_setclientid_res *arg,
4954 struct rpc_cred *cred)
1da177e4 4955{
1da177e4
LT		 4956 struct rpc_message msg = {
4957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4958 .rpc_argp = arg,
286d7d6a 4959 .rpc_cred = cred,
1da177e4 4960 };
1da177e4
LT		 4961 int status;
4962
6bbb4ae8
CL		 4963 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4964 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4965 clp->cl_clientid);
1bd714f2 4966 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4967 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4968 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4969 return status;
4970}
4971
fe650407
TM		 4972struct nfs4_delegreturndata {
4973 struct nfs4_delegreturnargs args;
fa178f29 4974 struct nfs4_delegreturnres res;
fe650407
TM		 4975 struct nfs_fh fh;
4976 nfs4_stateid stateid;
26e976a8 4977 unsigned long timestamp;
fa178f29 4978 struct nfs_fattr fattr;
fe650407
TM		 4979 int rpc_status;
4980};
4981
fe650407
TM		 4982static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4983{
4984 struct nfs4_delegreturndata *data = calldata;
938e1010 4985
14516c3a
TM		 4986 if (!nfs4_sequence_done(task, &data->res.seq_res))
4987 return;
938e1010 4988
ca8acf8d 4989 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 4990 switch (task->tk_status) {
79708861 4991 case 0:
fa178f29 4992 renew_lease(data->res.server, data->timestamp);
79708861 4993 break;
c97cf606
TM		 4994 case -NFS4ERR_ADMIN_REVOKED:
4995 case -NFS4ERR_DELEG_REVOKED:
4996 case -NFS4ERR_BAD_STATEID:
4997 case -NFS4ERR_OLD_STATEID:
4998 case -NFS4ERR_STALE_STATEID:
4999 case -NFS4ERR_EXPIRED:
5000 task->tk_status = 0;
5001 break;
79708861
RL		 5002 default:
5003 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5004 -EAGAIN) {
d00c5d43 5005 rpc_restart_call_prepare(task);
79708861
RL		 5006 return;
5007 }
5008 }
5009 data->rpc_status = task->tk_status;
fe650407
TM		 5010}
5011
5012static void nfs4_delegreturn_release(void *calldata)
5013{
fe650407
TM		 5014 kfree(calldata);
5015}
5016
938e1010
AA		 5017static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5018{
5019 struct nfs4_delegreturndata *d_data;
5020
5021 d_data = (struct nfs4_delegreturndata *)data;
5022
d9afbd1b
TM		 5023 nfs4_setup_sequence(d_data->res.server,
5024 &d_data->args.seq_args,
5025 &d_data->res.seq_res,
5026 task);
938e1010 5027}
938e1010 5028
c8d149f3 5029static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5030 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5031 .rpc_call_done = nfs4_delegreturn_done,
5032 .rpc_release = nfs4_delegreturn_release,
5033};
5034
e6f81075 5035static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5036{
5037 struct nfs4_delegreturndata *data;
fa178f29 5038 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5039 struct rpc_task *task;
5138fde0
TM		 5040 struct rpc_message msg = {
5041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5042 .rpc_cred = cred,
5043 };
c970aa85
TM		 5044 struct rpc_task_setup task_setup_data = {
5045 .rpc_client = server->client,
5138fde0 5046 .rpc_message = &msg,
c970aa85
TM		 5047 .callback_ops = &nfs4_delegreturn_ops,
5048 .flags = RPC_TASK_ASYNC,
5049 };
e6f81075 5050 int status = 0;
fe650407 5051
8535b2be 5052 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5053 if (data == NULL)
5054 return -ENOMEM;
a9c92d6b 5055 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5056 data->args.fhandle = &data->fh;
5057 data->args.stateid = &data->stateid;
9e907fec 5058 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5059 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5060 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5061 data->res.fattr = &data->fattr;
5062 data->res.server = server;
5138fde0 5063 nfs_fattr_init(data->res.fattr);
26e976a8 5064 data->timestamp = jiffies;
fe650407
TM		 5065 data->rpc_status = 0;
5066
c970aa85 5067 task_setup_data.callback_data = data;
1174dd1f
TM		 5068 msg.rpc_argp = &data->args;
5069 msg.rpc_resp = &data->res;
c970aa85 5070 task = rpc_run_task(&task_setup_data);
7a1218a2 5071 if (IS_ERR(task))
fe650407 5072 return PTR_ERR(task);
e6f81075
TM		 5073 if (!issync)
5074 goto out;
fe650407 5075 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5076 if (status != 0)
5077 goto out;
5078 status = data->rpc_status;
e144cbcc
TM		 5079 if (status == 0)
5080 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5081 else
5082 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5083out:
e6b3c4db 5084 rpc_put_task(task);
fe650407 5085 return status;
1da177e4
LT		 5086}
5087
e6f81075 5088int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5089{
5090 struct nfs_server *server = NFS_SERVER(inode);
5091 struct nfs4_exception exception = { };
5092 int err;
5093 do {
e6f81075 5094 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5095 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5096 switch (err) {
5097 case -NFS4ERR_STALE_STATEID:
5098 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5099 case 0:
5100 return 0;
5101 }
5102 err = nfs4_handle_exception(server, err, &exception);
5103 } while (exception.retry);
5104 return err;
5105}
5106
5107#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5108#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5109
5110/*
5111 * sleep, with exponential backoff, and retry the LOCK operation.
5112 */
5113static unsigned long
5114nfs4_set_lock_task_retry(unsigned long timeout)
5115{
416ad3c9 5116 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5117 timeout <<= 1;
5118 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5119 return NFS4_LOCK_MAXTIMEOUT;
5120 return timeout;
5121}
5122
1da177e4
LT		 5123static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5124{
5125 struct inode *inode = state->inode;
5126 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5127 struct nfs_client *clp = server->nfs_client;
911d1aaf 5128 struct nfs_lockt_args arg = {
1da177e4 5129 .fh = NFS_FH(inode),
911d1aaf 5130 .fl = request,
1da177e4 5131 };
911d1aaf
TM		 5132 struct nfs_lockt_res res = {
5133 .denied = request,
1da177e4
LT		 5134 };
5135 struct rpc_message msg = {
5136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5137 .rpc_argp = &arg,
5138 .rpc_resp = &res,
5139 .rpc_cred = state->owner->so_cred,
5140 };
1da177e4
LT		 5141 struct nfs4_lock_state *lsp;
5142 int status;
5143
911d1aaf 5144 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5145 status = nfs4_set_lock_state(state, request);
5146 if (status != 0)
5147 goto out;
5148 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5149 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5150 arg.lock_owner.s_dev = server->s_dev;
7c513058 5151 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5152 switch (status) {
5153 case 0:
5154 request->fl_type = F_UNLCK;
5155 break;
5156 case -NFS4ERR_DENIED:
5157 status = 0;
1da177e4 5158 }
70cc6487 5159 request->fl_ops->fl_release_private(request);
a6f951dd 5160 request->fl_ops = NULL;
8d0a8a9d 5161out:
1da177e4
LT		 5162 return status;
5163}
5164
5165static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5166{
5167 struct nfs4_exception exception = { };
5168 int err;
5169
5170 do {
d1b748a5
TM		 5171 err = _nfs4_proc_getlk(state, cmd, request);
5172 trace_nfs4_get_lock(request, state, cmd, err);
5173 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5174 &exception);
5175 } while (exception.retry);
5176 return err;
5177}
5178
5179static int do_vfs_lock(struct file *file, struct file_lock *fl)
5180{
5181 int res = 0;
5182 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5183 case FL_POSIX:
5184 res = posix_lock_file_wait(file, fl);
5185 break;
5186 case FL_FLOCK:
5187 res = flock_lock_file_wait(file, fl);
5188 break;
5189 default:
5190 BUG();
5191 }
1da177e4
LT		 5192 return res;
5193}
5194
faf5f49c 5195struct nfs4_unlockdata {
911d1aaf
TM		 5196 struct nfs_locku_args arg;
5197 struct nfs_locku_res res;
faf5f49c
TM		 5198 struct nfs4_lock_state *lsp;
5199 struct nfs_open_context *ctx;
911d1aaf
TM		 5200 struct file_lock fl;
5201 const struct nfs_server *server;
26e976a8 5202 unsigned long timestamp;
faf5f49c
TM		 5203};
5204
911d1aaf
TM		 5205static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5206 struct nfs_open_context *ctx,
5207 struct nfs4_lock_state *lsp,
5208 struct nfs_seqid *seqid)
5209{
5210 struct nfs4_unlockdata *p;
5211 struct inode *inode = lsp->ls_state->inode;
5212
8535b2be 5213 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5214 if (p == NULL)
5215 return NULL;
5216 p->arg.fh = NFS_FH(inode);
5217 p->arg.fl = &p->fl;
5218 p->arg.seqid = seqid;
c1d51931 5219 p->res.seqid = seqid;
911d1aaf
TM		 5220 p->arg.stateid = &lsp->ls_stateid;
5221 p->lsp = lsp;
5222 atomic_inc(&lsp->ls_count);
5223 /* Ensure we don't close file until we're done freeing locks! */
5224 p->ctx = get_nfs_open_context(ctx);
5225 memcpy(&p->fl, fl, sizeof(p->fl));
5226 p->server = NFS_SERVER(inode);
5227 return p;
5228}
5229
06f814a3 5230static void nfs4_locku_release_calldata(void *data)
faf5f49c 5231{
963d8fe5 5232 struct nfs4_unlockdata *calldata = data;
911d1aaf 5233 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5234 nfs4_put_lock_state(calldata->lsp);
5235 put_nfs_open_context(calldata->ctx);
5236 kfree(calldata);
faf5f49c
TM		 5237}
5238
963d8fe5 5239static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5240{
963d8fe5 5241 struct nfs4_unlockdata *calldata = data;
faf5f49c 5242
14516c3a
TM		 5243 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5244 return;
faf5f49c
TM		 5245 switch (task->tk_status) {
5246 case 0:
f597c537
TM		 5247 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5248 &calldata->res.stateid);
26e976a8 5249 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5250 break;
9e33bed5
TM		 5251 case -NFS4ERR_BAD_STATEID:
5252 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5253 case -NFS4ERR_STALE_STATEID:
5254 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5255 break;
5256 default:
9e33bed5 5257 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5258 rpc_restart_call_prepare(task);
faf5f49c 5259 }
2b1bc308 5260 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5261}
5262
4ce70ada 5263static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5264{
4ce70ada 5265 struct nfs4_unlockdata *calldata = data;
faf5f49c 5266
911d1aaf 5267 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5268 goto out_wait;
795a88c9 5269 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5270 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5271 goto out_no_action;
faf5f49c 5272 }
26e976a8 5273 calldata->timestamp = jiffies;
035168ab 5274 if (nfs4_setup_sequence(calldata->server,
a893693c 5275 &calldata->arg.seq_args,
2240a9e2
TM		 5276 &calldata->res.seq_res,
5277 task) != 0)
5278 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5279 return;
5280out_no_action:
5281 task->tk_action = NULL;
5282out_wait:
5283 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5284}
5285
963d8fe5 5286static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5287 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5288 .rpc_call_done = nfs4_locku_done,
06f814a3 5289 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5290};
5291
a5d16a4d
TM		 5292static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5293 struct nfs_open_context *ctx,
5294 struct nfs4_lock_state *lsp,
5295 struct nfs_seqid *seqid)
5296{
5297 struct nfs4_unlockdata *data;
5138fde0
TM		 5298 struct rpc_message msg = {
5299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5300 .rpc_cred = ctx->cred,
5301 };
c970aa85
TM		 5302 struct rpc_task_setup task_setup_data = {
5303 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5304 .rpc_message = &msg,
c970aa85 5305 .callback_ops = &nfs4_locku_ops,
101070ca 5306 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5307 .flags = RPC_TASK_ASYNC,
5308 };
a5d16a4d 5309
fa940720
WAA		 5310 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5311 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5312
137d6aca
FF		 5313 /* Ensure this is an unlock - when canceling a lock, the
5314 * canceled lock is passed in, and it won't be an unlock.
5315 */
5316 fl->fl_type = F_UNLCK;
5317
a5d16a4d
TM		 5318 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5319 if (data == NULL) {
5320 nfs_free_seqid(seqid);
5321 return ERR_PTR(-ENOMEM);
5322 }
5323
a9c92d6b 5324 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5325 msg.rpc_argp = &data->arg;
5326 msg.rpc_resp = &data->res;
c970aa85
TM		 5327 task_setup_data.callback_data = data;
5328 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5329}
5330
faf5f49c
TM		 5331static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5332{
65b62a29
TM		 5333 struct inode *inode = state->inode;
5334 struct nfs4_state_owner *sp = state->owner;
5335 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5336 struct nfs_seqid *seqid;
1da177e4 5337 struct nfs4_lock_state *lsp;
06f814a3
TM		 5338 struct rpc_task *task;
5339 int status = 0;
536ff0f8 5340 unsigned char fl_flags = request->fl_flags;
faf5f49c 5341
8d0a8a9d 5342 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5343 /* Unlock _before_ we do the RPC call */
5344 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5345 /* Exclude nfs_delegation_claim_locks() */
5346 mutex_lock(&sp->so_delegreturn_mutex);
5347 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5348 down_read(&nfsi->rwsem);
5349 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5350 up_read(&nfsi->rwsem);
65b62a29 5351 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5352 goto out;
19e03c57
TM		 5353 }
5354 up_read(&nfsi->rwsem);
65b62a29 5355 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5356 if (status != 0)
9b073574
TM		 5357 goto out;
5358 /* Is this a delegated lock? */
8d0a8a9d 5359 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5360 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5361 goto out;
8535b2be 5362 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5363 status = -ENOMEM;
911d1aaf 5364 if (seqid == NULL)
9b073574 5365 goto out;
cd3758e3 5366 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5367 status = PTR_ERR(task);
5368 if (IS_ERR(task))
9b073574 5369 goto out;
a5d16a4d 5370 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5371 rpc_put_task(task);
9b073574 5372out:
536ff0f8 5373 request->fl_flags = fl_flags;
d1b748a5 5374 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5375 return status;
5376}
5377
a5d16a4d
TM		 5378struct nfs4_lockdata {
5379 struct nfs_lock_args arg;
5380 struct nfs_lock_res res;
5381 struct nfs4_lock_state *lsp;
5382 struct nfs_open_context *ctx;
5383 struct file_lock fl;
26e976a8 5384 unsigned long timestamp;
a5d16a4d
TM		 5385 int rpc_status;
5386 int cancelled;
66179efe 5387 struct nfs_server *server;
a5d16a4d
TM		 5388};
5389
5390static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5391 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5392 gfp_t gfp_mask)
1da177e4 5393{
a5d16a4d
TM		 5394 struct nfs4_lockdata *p;
5395 struct inode *inode = lsp->ls_state->inode;
1da177e4 5396 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5397
8535b2be 5398 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5399 if (p == NULL)
5400 return NULL;
5401
5402 p->arg.fh = NFS_FH(inode);
5403 p->arg.fl = &p->fl;
8535b2be 5404 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5405 if (p->arg.open_seqid == NULL)
5406 goto out_free;
8535b2be 5407 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5408 if (p->arg.lock_seqid == NULL)
2f74c0a0 5409 goto out_free_seqid;
a5d16a4d 5410 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5411 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5412 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5413 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5414 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5415 p->lsp = lsp;
66179efe 5416 p->server = server;
a5d16a4d
TM		 5417 atomic_inc(&lsp->ls_count);
5418 p->ctx = get_nfs_open_context(ctx);
5419 memcpy(&p->fl, fl, sizeof(p->fl));
5420 return p;
2f74c0a0
TM		 5421out_free_seqid:
5422 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5423out_free:
5424 kfree(p);
5425 return NULL;
5426}
5427
5428static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5429{
5430 struct nfs4_lockdata *data = calldata;
5431 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5432
3110ff80 5433 dprintk("%s: begin!\n", __func__);
2f74c0a0 5434 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5435 goto out_wait;
a5d16a4d
TM		 5436 /* Do we need to do an open_to_lock_owner? */
5437 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5438 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5439 goto out_release_lock_seqid;
8fe72bac 5440 }
8e472f33 5441 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5442 data->arg.new_lock_owner = 1;
c1d51931 5443 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5444 } else
5445 data->arg.new_lock_owner = 0;
5d422301
TM		 5446 if (!nfs4_valid_open_stateid(state)) {
5447 data->rpc_status = -EBADF;
5448 task->tk_action = NULL;
5449 goto out_release_open_seqid;
5450 }
26e976a8 5451 data->timestamp = jiffies;
035168ab
TM		 5452 if (nfs4_setup_sequence(data->server,
5453 &data->arg.seq_args,
2240a9e2 5454 &data->res.seq_res,
d9afbd1b 5455 task) == 0)
66179efe 5456 return;
5d422301 5457out_release_open_seqid:
2240a9e2
TM		 5458 nfs_release_seqid(data->arg.open_seqid);
5459out_release_lock_seqid:
5460 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5461out_wait:
5462 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5463 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5464}
5465
a5d16a4d
TM		 5466static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5467{
5468 struct nfs4_lockdata *data = calldata;
5469
3110ff80 5470 dprintk("%s: begin!\n", __func__);
a5d16a4d 5471
14516c3a
TM		 5472 if (!nfs4_sequence_done(task, &data->res.seq_res))
5473 return;
66179efe 5474
a5d16a4d 5475 data->rpc_status = task->tk_status;
a5d16a4d 5476 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5477 if (data->rpc_status == 0)
5478 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5479 else
5480 goto out;
5481 }
5482 if (data->rpc_status == 0) {
f597c537 5483 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5484 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5485 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5486 }
a5d16a4d 5487out:
3110ff80 5488 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5489}
5490
5491static void nfs4_lock_release(void *calldata)
5492{
5493 struct nfs4_lockdata *data = calldata;
5494
3110ff80 5495 dprintk("%s: begin!\n", __func__);
2f74c0a0 5496 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5497 if (data->cancelled != 0) {
5498 struct rpc_task *task;
5499 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5500 data->arg.lock_seqid);
5501 if (!IS_ERR(task))
bf294b41 5502 rpc_put_task_async(task);
3110ff80 5503 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5504 } else
5505 nfs_free_seqid(data->arg.lock_seqid);
5506 nfs4_put_lock_state(data->lsp);
5507 put_nfs_open_context(data->ctx);
5508 kfree(data);
3110ff80 5509 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5510}
5511
5512static const struct rpc_call_ops nfs4_lock_ops = {
5513 .rpc_call_prepare = nfs4_lock_prepare,
5514 .rpc_call_done = nfs4_lock_done,
5515 .rpc_release = nfs4_lock_release,
5516};
5517
2bee72a6
TM		 5518static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5519{
2bee72a6
TM		 5520 switch (error) {
5521 case -NFS4ERR_ADMIN_REVOKED:
5522 case -NFS4ERR_BAD_STATEID:
ecac799a 5523 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5524 if (new_lock_owner != 0 ||
795a88c9 5525 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5526 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5527 break;
5528 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5529 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5530 case -NFS4ERR_EXPIRED:
5531 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5532 };
5533}
5534
afe6c27c 5535static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5536{
5537 struct nfs4_lockdata *data;
5538 struct rpc_task *task;
5138fde0
TM		 5539 struct rpc_message msg = {
5540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5541 .rpc_cred = state->owner->so_cred,
5542 };
c970aa85
TM		 5543 struct rpc_task_setup task_setup_data = {
5544 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5545 .rpc_message = &msg,
c970aa85 5546 .callback_ops = &nfs4_lock_ops,
101070ca 5547 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5548 .flags = RPC_TASK_ASYNC,
5549 };
a5d16a4d
TM		 5550 int ret;
5551
3110ff80 5552 dprintk("%s: begin!\n", __func__);
cd3758e3 5553 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5554 fl->fl_u.nfs4_fl.owner,
5555 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5556 if (data == NULL)
5557 return -ENOMEM;
5558 if (IS_SETLKW(cmd))
5559 data->arg.block = 1;
a9c92d6b 5560 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5561 msg.rpc_argp = &data->arg;
5562 msg.rpc_resp = &data->res;
c970aa85 5563 task_setup_data.callback_data = data;
8fe72bac
TM		 5564 if (recovery_type > NFS_LOCK_NEW) {
5565 if (recovery_type == NFS_LOCK_RECLAIM)
5566 data->arg.reclaim = NFS_LOCK_RECLAIM;
5567 nfs4_set_sequence_privileged(&data->arg.seq_args);
5568 }
c970aa85 5569 task = rpc_run_task(&task_setup_data);
7a1218a2 5570 if (IS_ERR(task))
a5d16a4d 5571 return PTR_ERR(task);
a5d16a4d
TM		 5572 ret = nfs4_wait_for_completion_rpc_task(task);
5573 if (ret == 0) {
5574 ret = data->rpc_status;
2bee72a6
TM		 5575 if (ret)
5576 nfs4_handle_setlk_error(data->server, data->lsp,
5577 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5578 } else
5579 data->cancelled = 1;
e6b3c4db 5580 rpc_put_task(task);
3110ff80 5581 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5582 return ret;
1da177e4
LT		 5583}
5584
5585static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5586{
202b50dc 5587 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5588 struct nfs4_exception exception = {
5589 .inode = state->inode,
5590 };
202b50dc
TM		 5591 int err;
5592
5593 do {
42a2d13e
TM		 5594 /* Cache the lock if possible... */
5595 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5596 return 0;
afe6c27c 5597 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5598 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5599 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5600 break;
5601 nfs4_handle_exception(server, err, &exception);
5602 } while (exception.retry);
5603 return err;
1da177e4
LT		 5604}
5605
5606static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5607{
202b50dc 5608 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5609 struct nfs4_exception exception = {
5610 .inode = state->inode,
5611 };
202b50dc
TM		 5612 int err;
5613
6bfc93ef
TM		 5614 err = nfs4_set_lock_state(state, request);
5615 if (err != 0)
5616 return err;
f6de7a39 5617 if (!recover_lost_locks) {
ef1820f9
N		 5618 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5619 return 0;
5620 }
202b50dc 5621 do {
42a2d13e
TM		 5622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5623 return 0;
afe6c27c 5624 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5625 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5626 switch (err) {
5627 default:
5628 goto out;
5629 case -NFS4ERR_GRACE:
5630 case -NFS4ERR_DELAY:
5631 nfs4_handle_exception(server, err, &exception);
5632 err = 0;
5633 }
202b50dc 5634 } while (exception.retry);
a9ed2e25 5635out:
202b50dc 5636 return err;
1da177e4
LT		 5637}
5638
f062eb6c 5639#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5640/**
5641 * nfs41_check_expired_locks - possibly free a lock stateid
5642 *
5643 * @state: NFSv4 state for an inode
5644 *
5645 * Returns NFS_OK if recovery for this stateid is now finished.
5646 * Otherwise a negative NFS4ERR value is returned.
5647 */
b01dd1d8 5648static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5649{
eb64cf96 5650 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5651 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5652 struct nfs_server *server = NFS_SERVER(state->inode);
5653
b01dd1d8 5654 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5655 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5656 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5657
5658 status = nfs41_test_stateid(server,
5659 &lsp->ls_stateid,
5660 cred);
08cb47fa 5661 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5662 if (status != NFS_OK) {
3e60ffdd
CL		 5663 /* Free the stateid unless the server
5664 * informs us the stateid is unrecognized. */
89af2739
CL		 5665 if (status != -NFS4ERR_BAD_STATEID)
5666 nfs41_free_stateid(server,
ab7cb0df
TM		 5667 &lsp->ls_stateid,
5668 cred);
795a88c9 5669 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5670 ret = status;
5671 }
5672 }
5673 };
5674
5675 return ret;
5676}
5677
5678static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5679{
5680 int status = NFS_OK;
5681
5682 if (test_bit(LK_STATE_IN_USE, &state->flags))
5683 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5684 if (status != NFS_OK)
5685 status = nfs4_lock_expired(state, request);
5686 return status;
f062eb6c
BS		 5687}
5688#endif
5689
1da177e4
LT		 5690static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5691{
9a99af49 5692 struct nfs4_state_owner *sp = state->owner;
19e03c57 5693 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5694 unsigned char fl_flags = request->fl_flags;
9a99af49 5695 unsigned int seq;
8e469ebd 5696 int status = -ENOLCK;
1da177e4 5697
8e469ebd
TM		 5698 if ((fl_flags & FL_POSIX) &&
5699 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5700 goto out;
6bfc93ef 5701 /* Is this a delegated open? */
6bfc93ef
TM		 5702 status = nfs4_set_lock_state(state, request);
5703 if (status != 0)
5704 goto out;
01c3b861
TM		 5705 request->fl_flags |= FL_ACCESS;
5706 status = do_vfs_lock(request->fl_file, request);
5707 if (status < 0)
5708 goto out;
19e03c57 5709 down_read(&nfsi->rwsem);
01c3b861 5710 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5711 /* Yes: cache locks! */
01c3b861 5712 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5713 request->fl_flags = fl_flags & ~FL_SLEEP;
5714 status = do_vfs_lock(request->fl_file, request);
5715 goto out_unlock;
01c3b861 5716 }
9a99af49
TM		 5717 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5718 up_read(&nfsi->rwsem);
afe6c27c 5719 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5720 if (status != 0)
9a99af49
TM		 5721 goto out;
5722 down_read(&nfsi->rwsem);
5723 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5724 status = -NFS4ERR_DELAY;
01c3b861 5725 goto out_unlock;
9a99af49 5726 }
6bfc93ef 5727 /* Note: we always want to sleep here! */
01c3b861 5728 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5729 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5730 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5731 "manager!\n", __func__);
01c3b861 5732out_unlock:
19e03c57 5733 up_read(&nfsi->rwsem);
01c3b861
TM		 5734out:
5735 request->fl_flags = fl_flags;
1da177e4
LT		 5736 return status;
5737}
5738
5739static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5740{
a1d0b5ee
TM		 5741 struct nfs4_exception exception = {
5742 .state = state,
05ffe24f 5743 .inode = state->inode,
a1d0b5ee 5744 };
1da177e4
LT		 5745 int err;
5746
5747 do {
965b5d67 5748 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5749 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5750 if (err == -NFS4ERR_DENIED)
5751 err = -EAGAIN;
1da177e4 5752 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5753 err, &exception);
1da177e4
LT		 5754 } while (exception.retry);
5755 return err;
5756}
5757
5758static int
5759nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5760{
5761 struct nfs_open_context *ctx;
5762 struct nfs4_state *state;
5763 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5764 int status;
5765
5766 /* verify open state */
cd3758e3 5767 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5768 state = ctx->state;
5769
5770 if (request->fl_start < 0 || request->fl_end < 0)
5771 return -EINVAL;
5772
d953126a
TM		 5773 if (IS_GETLK(cmd)) {
5774 if (state != NULL)
5775 return nfs4_proc_getlk(state, F_GETLK, request);
5776 return 0;
5777 }
1da177e4
LT		 5778
5779 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5780 return -EINVAL;
5781
d953126a
TM		 5782 if (request->fl_type == F_UNLCK) {
5783 if (state != NULL)
5784 return nfs4_proc_unlck(state, cmd, request);
5785 return 0;
5786 }
1da177e4 5787
d953126a
TM		 5788 if (state == NULL)
5789 return -ENOLCK;
55725513
TM		 5790 /*
5791 * Don't rely on the VFS having checked the file open mode,
5792 * since it won't do this for flock() locks.
5793 */
f44106e2 5794 switch (request->fl_type) {
55725513
TM		 5795 case F_RDLCK:
5796 if (!(filp->f_mode & FMODE_READ))
5797 return -EBADF;
5798 break;
5799 case F_WRLCK:
5800 if (!(filp->f_mode & FMODE_WRITE))
5801 return -EBADF;
5802 }
5803
1da177e4
LT		 5804 do {
5805 status = nfs4_proc_setlk(state, cmd, request);
5806 if ((status != -EAGAIN) || IS_SETLK(cmd))
5807 break;
5808 timeout = nfs4_set_lock_task_retry(timeout);
5809 status = -ERESTARTSYS;
5810 if (signalled())
5811 break;
5812 } while(status < 0);
1da177e4
LT		 5813 return status;
5814}
5815
db4f2e63 5816int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5817{
5818 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5819 int err;
5820
5821 err = nfs4_set_lock_state(state, fl);
5822 if (err != 0)
db4f2e63 5823 return err;
4a706fa0 5824 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5825 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5826}
6b3b5496 5827
cf470c3e
TM		 5828struct nfs_release_lockowner_data {
5829 struct nfs4_lock_state *lsp;
5ae67c4f 5830 struct nfs_server *server;
cf470c3e 5831 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5832 struct nfs4_sequence_args seq_args;
5833 struct nfs4_sequence_res seq_res;
60ea6812 5834 unsigned long timestamp;
cf470c3e
TM		 5835};
5836
fbd4bfd1
CL		 5837static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5838{
5839 struct nfs_release_lockowner_data *data = calldata;
5840 nfs40_setup_sequence(data->server,
5841 &data->seq_args, &data->seq_res, task);
60ea6812 5842 data->timestamp = jiffies;
fbd4bfd1
CL		 5843}
5844
5845static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5846{
5847 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5848 struct nfs_server *server = data->server;
5849
fbd4bfd1 5850 nfs40_sequence_done(task, &data->seq_res);
60ea6812
CL		 5851
5852 switch (task->tk_status) {
5853 case 0:
5854 renew_lease(server, data->timestamp);
5855 break;
5856 case -NFS4ERR_STALE_CLIENTID:
5857 case -NFS4ERR_EXPIRED:
5858 case -NFS4ERR_LEASE_MOVED:
5859 case -NFS4ERR_DELAY:
5860 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5861 rpc_restart_call_prepare(task);
5862 }
fbd4bfd1
CL		 5863}
5864
d3c7b7cc
TM		 5865static void nfs4_release_lockowner_release(void *calldata)
5866{
cf470c3e 5867 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5868 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5869 kfree(calldata);
5870}
5871
17280175 5872static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5873 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5874 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5875 .rpc_release = nfs4_release_lockowner_release,
5876};
5877
c8b2d0bf 5878static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5879{
cf470c3e 5880 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5881 struct rpc_message msg = {
5882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5883 };
5884
5885 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5886 return -EINVAL;
fbd4bfd1 5887
cf470c3e
TM		 5888 data = kmalloc(sizeof(*data), GFP_NOFS);
5889 if (!data)
5890 return -ENOMEM;
fbd4bfd1 5891 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5892 data->lsp = lsp;
5ae67c4f 5893 data->server = server;
cf470c3e
TM		 5894 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5895 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5896 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5897
cf470c3e
TM		 5898 msg.rpc_argp = &data->args;
5899 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5900 return 0;
d3c7b7cc
TM		 5901}
5902
aa1870af
BF		 5903#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5904
64c2ce8b
AK		 5905static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5906 const void *buf, size_t buflen,
5907 int flags, int type)
6b3b5496 5908{
64c2ce8b
AK		 5909 if (strcmp(key, "") != 0)
5910 return -EINVAL;
4b580ee3 5911
64c2ce8b 5912 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5913}
5914
64c2ce8b
AK		 5915static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5916 void *buf, size_t buflen, int type)
6b3b5496 5917{
64c2ce8b
AK		 5918 if (strcmp(key, "") != 0)
5919 return -EINVAL;
aa1870af 5920
64c2ce8b 5921 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5922}
5923
64c2ce8b
AK		 5924static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5925 size_t list_len, const char *name,
5926 size_t name_len, int type)
6b3b5496 5927{
64c2ce8b 5928 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5929
096455a2
BF		 5930 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5931 return 0;
64c2ce8b
AK		 5932
5933 if (list && len <= list_len)
5934 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5935 return len;
6b3b5496
BF		 5936}
5937
c9bccef6
DQ		 5938#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5939static inline int nfs4_server_supports_labels(struct nfs_server *server)
5940{
5941 return server->caps & NFS_CAP_SECURITY_LABEL;
5942}
5943
5944static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5945 const void *buf, size_t buflen,
5946 int flags, int type)
5947{
5948 if (security_ismaclabel(key))
5949 return nfs4_set_security_label(dentry, buf, buflen);
5950
5951 return -EOPNOTSUPP;
5952}
5953
5954static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5955 void *buf, size_t buflen, int type)
5956{
5957 if (security_ismaclabel(key))
5958 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5959 return -EOPNOTSUPP;
5960}
5961
5962static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5963 size_t list_len, const char *name,
5964 size_t name_len, int type)
5965{
5966 size_t len = 0;
5967
5968 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5969 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5970 if (list && len <= list_len)
5971 security_inode_listsecurity(dentry->d_inode, list, len);
5972 }
5973 return len;
5974}
5975
5976static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5977 .prefix = XATTR_SECURITY_PREFIX,
5978 .list = nfs4_xattr_list_nfs4_label,
5979 .get = nfs4_xattr_get_nfs4_label,
5980 .set = nfs4_xattr_set_nfs4_label,
5981};
5982#endif
5983
5984
533eb461
AA		 5985/*
5986 * nfs_fhget will use either the mounted_on_fileid or the fileid
5987 */
69aaaae1
TM		 5988static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5989{
533eb461
AA		 5990 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5991 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5992 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5993 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5994 return;
5995
5996 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5997 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5998 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5999 fattr->nlink = 2;
6000}
6001
f05d147f
BS		 6002static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6003 const struct qstr *name,
6004 struct nfs4_fs_locations *fs_locations,
6005 struct page *page)
683b57b4
TM		 6006{
6007 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6008 u32 bitmask[3] = {
361e624f 6009 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6010 };
6011 struct nfs4_fs_locations_arg args = {
6012 .dir_fh = NFS_FH(dir),
c228fd3a 6013 .name = name,
683b57b4
TM		 6014 .page = page,
6015 .bitmask = bitmask,
6016 };
22958463
BH		 6017 struct nfs4_fs_locations_res res = {
6018 .fs_locations = fs_locations,
6019 };
683b57b4
TM		 6020 struct rpc_message msg = {
6021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6022 .rpc_argp = &args,
22958463 6023 .rpc_resp = &res,
683b57b4
TM		 6024 };
6025 int status;
6026
3110ff80 6027 dprintk("%s: start\n", __func__);
533eb461
AA		 6028
6029 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6030 * is not supported */
6031 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6032 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6033 else
6034 bitmask[0] |= FATTR4_WORD0_FILEID;
6035
c228fd3a 6036 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6037 fs_locations->server = server;
830b8e33 6038 fs_locations->nlocations = 0;
f05d147f 6039 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6040 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6041 return status;
6042}
6043
f05d147f
BS		 6044int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6045 const struct qstr *name,
6046 struct nfs4_fs_locations *fs_locations,
6047 struct page *page)
db0a9593
BS		 6048{
6049 struct nfs4_exception exception = { };
6050 int err;
6051 do {
078ea3df
TM		 6052 err = _nfs4_proc_fs_locations(client, dir, name,
6053 fs_locations, page);
6054 trace_nfs4_get_fs_locations(dir, name, err);
6055 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6056 &exception);
6057 } while (exception.retry);
6058 return err;
6059}
6060
b03d735b
CL		 6061/*
6062 * This operation also signals the server that this client is
6063 * performing migration recovery. The server can stop returning
6064 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6065 * appended to this compound to identify the client ID which is
6066 * performing recovery.
6067 */
6068static int _nfs40_proc_get_locations(struct inode *inode,
6069 struct nfs4_fs_locations *locations,
6070 struct page *page, struct rpc_cred *cred)
6071{
6072 struct nfs_server *server = NFS_SERVER(inode);
6073 struct rpc_clnt *clnt = server->client;
6074 u32 bitmask[2] = {
6075 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6076 };
6077 struct nfs4_fs_locations_arg args = {
6078 .clientid = server->nfs_client->cl_clientid,
6079 .fh = NFS_FH(inode),
6080 .page = page,
6081 .bitmask = bitmask,
6082 .migration = 1, /* skip LOOKUP */
6083 .renew = 1, /* append RENEW */
6084 };
6085 struct nfs4_fs_locations_res res = {
6086 .fs_locations = locations,
6087 .migration = 1,
6088 .renew = 1,
6089 };
6090 struct rpc_message msg = {
6091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6092 .rpc_argp = &args,
6093 .rpc_resp = &res,
6094 .rpc_cred = cred,
6095 };
6096 unsigned long now = jiffies;
6097 int status;
6098
6099 nfs_fattr_init(&locations->fattr);
6100 locations->server = server;
6101 locations->nlocations = 0;
6102
6103 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6104 nfs4_set_sequence_privileged(&args.seq_args);
6105 status = nfs4_call_sync_sequence(clnt, server, &msg,
6106 &args.seq_args, &res.seq_res);
6107 if (status)
6108 return status;
6109
6110 renew_lease(server, now);
6111 return 0;
6112}
6113
6114#ifdef CONFIG_NFS_V4_1
6115
6116/*
6117 * This operation also signals the server that this client is
6118 * performing migration recovery. The server can stop asserting
6119 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6120 * performing this operation is identified in the SEQUENCE
6121 * operation in this compound.
6122 *
6123 * When the client supports GETATTR(fs_locations_info), it can
6124 * be plumbed in here.
6125 */
6126static int _nfs41_proc_get_locations(struct inode *inode,
6127 struct nfs4_fs_locations *locations,
6128 struct page *page, struct rpc_cred *cred)
6129{
6130 struct nfs_server *server = NFS_SERVER(inode);
6131 struct rpc_clnt *clnt = server->client;
6132 u32 bitmask[2] = {
6133 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6134 };
6135 struct nfs4_fs_locations_arg args = {
6136 .fh = NFS_FH(inode),
6137 .page = page,
6138 .bitmask = bitmask,
6139 .migration = 1, /* skip LOOKUP */
6140 };
6141 struct nfs4_fs_locations_res res = {
6142 .fs_locations = locations,
6143 .migration = 1,
6144 };
6145 struct rpc_message msg = {
6146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6147 .rpc_argp = &args,
6148 .rpc_resp = &res,
6149 .rpc_cred = cred,
6150 };
6151 int status;
6152
6153 nfs_fattr_init(&locations->fattr);
6154 locations->server = server;
6155 locations->nlocations = 0;
6156
6157 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6158 nfs4_set_sequence_privileged(&args.seq_args);
6159 status = nfs4_call_sync_sequence(clnt, server, &msg,
6160 &args.seq_args, &res.seq_res);
6161 if (status == NFS4_OK &&
6162 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6163 status = -NFS4ERR_LEASE_MOVED;
6164 return status;
6165}
6166
6167#endif /* CONFIG_NFS_V4_1 */
6168
6169/**
6170 * nfs4_proc_get_locations - discover locations for a migrated FSID
6171 * @inode: inode on FSID that is migrating
6172 * @locations: result of query
6173 * @page: buffer
6174 * @cred: credential to use for this operation
6175 *
6176 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6177 * operation failed, or a negative errno if a local error occurred.
6178 *
6179 * On success, "locations" is filled in, but if the server has
6180 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6181 * asserted.
6182 *
6183 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6184 * from this client that require migration recovery.
6185 */
6186int nfs4_proc_get_locations(struct inode *inode,
6187 struct nfs4_fs_locations *locations,
6188 struct page *page, struct rpc_cred *cred)
6189{
6190 struct nfs_server *server = NFS_SERVER(inode);
6191 struct nfs_client *clp = server->nfs_client;
6192 const struct nfs4_mig_recovery_ops *ops =
6193 clp->cl_mvops->mig_recovery_ops;
6194 struct nfs4_exception exception = { };
6195 int status;
6196
6197 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6198 (unsigned long long)server->fsid.major,
6199 (unsigned long long)server->fsid.minor,
6200 clp->cl_hostname);
6201 nfs_display_fhandle(NFS_FH(inode), __func__);
6202
6203 do {
6204 status = ops->get_locations(inode, locations, page, cred);
6205 if (status != -NFS4ERR_DELAY)
6206 break;
6207 nfs4_handle_exception(server, status, &exception);
6208 } while (exception.retry);
6209 return status;
6210}
6211
44c99933
CL		 6212/*
6213 * This operation also signals the server that this client is
6214 * performing "lease moved" recovery. The server can stop
6215 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6216 * is appended to this compound to identify the client ID which is
6217 * performing recovery.
6218 */
6219static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6220{
6221 struct nfs_server *server = NFS_SERVER(inode);
6222 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6223 struct rpc_clnt *clnt = server->client;
6224 struct nfs4_fsid_present_arg args = {
6225 .fh = NFS_FH(inode),
6226 .clientid = clp->cl_clientid,
6227 .renew = 1, /* append RENEW */
6228 };
6229 struct nfs4_fsid_present_res res = {
6230 .renew = 1,
6231 };
6232 struct rpc_message msg = {
6233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6234 .rpc_argp = &args,
6235 .rpc_resp = &res,
6236 .rpc_cred = cred,
6237 };
6238 unsigned long now = jiffies;
6239 int status;
6240
6241 res.fh = nfs_alloc_fhandle();
6242 if (res.fh == NULL)
6243 return -ENOMEM;
6244
6245 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6246 nfs4_set_sequence_privileged(&args.seq_args);
6247 status = nfs4_call_sync_sequence(clnt, server, &msg,
6248 &args.seq_args, &res.seq_res);
6249 nfs_free_fhandle(res.fh);
6250 if (status)
6251 return status;
6252
6253 do_renew_lease(clp, now);
6254 return 0;
6255}
6256
6257#ifdef CONFIG_NFS_V4_1
6258
6259/*
6260 * This operation also signals the server that this client is
6261 * performing "lease moved" recovery. The server can stop asserting
6262 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6263 * this operation is identified in the SEQUENCE operation in this
6264 * compound.
6265 */
6266static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6267{
6268 struct nfs_server *server = NFS_SERVER(inode);
6269 struct rpc_clnt *clnt = server->client;
6270 struct nfs4_fsid_present_arg args = {
6271 .fh = NFS_FH(inode),
6272 };
6273 struct nfs4_fsid_present_res res = {
6274 };
6275 struct rpc_message msg = {
6276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6277 .rpc_argp = &args,
6278 .rpc_resp = &res,
6279 .rpc_cred = cred,
6280 };
6281 int status;
6282
6283 res.fh = nfs_alloc_fhandle();
6284 if (res.fh == NULL)
6285 return -ENOMEM;
6286
6287 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6288 nfs4_set_sequence_privileged(&args.seq_args);
6289 status = nfs4_call_sync_sequence(clnt, server, &msg,
6290 &args.seq_args, &res.seq_res);
6291 nfs_free_fhandle(res.fh);
6292 if (status == NFS4_OK &&
6293 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6294 status = -NFS4ERR_LEASE_MOVED;
6295 return status;
6296}
6297
6298#endif /* CONFIG_NFS_V4_1 */
6299
6300/**
6301 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6302 * @inode: inode on FSID to check
6303 * @cred: credential to use for this operation
6304 *
6305 * Server indicates whether the FSID is present, moved, or not
6306 * recognized. This operation is necessary to clear a LEASE_MOVED
6307 * condition for this client ID.
6308 *
6309 * Returns NFS4_OK if the FSID is present on this server,
6310 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6311 * NFS4ERR code if some error occurred on the server, or a
6312 * negative errno if a local failure occurred.
6313 */
6314int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6315{
6316 struct nfs_server *server = NFS_SERVER(inode);
6317 struct nfs_client *clp = server->nfs_client;
6318 const struct nfs4_mig_recovery_ops *ops =
6319 clp->cl_mvops->mig_recovery_ops;
6320 struct nfs4_exception exception = { };
6321 int status;
6322
6323 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6324 (unsigned long long)server->fsid.major,
6325 (unsigned long long)server->fsid.minor,
6326 clp->cl_hostname);
6327 nfs_display_fhandle(NFS_FH(inode), __func__);
6328
6329 do {
6330 status = ops->fsid_present(inode, cred);
6331 if (status != -NFS4ERR_DELAY)
6332 break;
6333 nfs4_handle_exception(server, status, &exception);
6334 } while (exception.retry);
6335 return status;
6336}
6337
5ec16a85 6338/**
a5250def
WAA		 6339 * If 'use_integrity' is true and the state managment nfs_client
6340 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6341 * and the machine credential as per RFC3530bis and RFC5661 Security
6342 * Considerations sections. Otherwise, just use the user cred with the
6343 * filesystem's rpc_client.
5ec16a85 6344 */
a5250def 6345static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6346{
6347 int status;
6348 struct nfs4_secinfo_arg args = {
6349 .dir_fh = NFS_FH(dir),
6350 .name = name,
6351 };
6352 struct nfs4_secinfo_res res = {
6353 .flavors = flavors,
6354 };
6355 struct rpc_message msg = {
6356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6357 .rpc_argp = &args,
6358 .rpc_resp = &res,
6359 };
a5250def 6360 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6361 struct rpc_cred *cred = NULL;
a5250def
WAA		 6362
6363 if (use_integrity) {
6364 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6365 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6366 msg.rpc_cred = cred;
a5250def 6367 }
5a5ea0d4
BS		 6368
6369 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6370
6371 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6372 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6373
a5250def
WAA		 6374 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6375 &res.seq_res, 0);
5a5ea0d4 6376 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6377
7cb852df
WAA		 6378 if (cred)
6379 put_rpccred(cred);
a5250def 6380
5a5ea0d4
BS		 6381 return status;
6382}
6383
72de53ec
BS		 6384int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6385 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6386{
6387 struct nfs4_exception exception = { };
6388 int err;
6389 do {
a5250def
WAA		 6390 err = -NFS4ERR_WRONGSEC;
6391
6392 /* try to use integrity protection with machine cred */
6393 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6394 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6395
6396 /*
6397 * if unable to use integrity protection, or SECINFO with
6398 * integrity protection returns NFS4ERR_WRONGSEC (which is
6399 * disallowed by spec, but exists in deployed servers) use
6400 * the current filesystem's rpc_client and the user cred.
6401 */
6402 if (err == -NFS4ERR_WRONGSEC)
6403 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6404
078ea3df
TM		 6405 trace_nfs4_secinfo(dir, name, err);
6406 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6407 &exception);
6408 } while (exception.retry);
6409 return err;
6410}
6411
557134a3 6412#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6413/*
6414 * Check the exchange flags returned by the server for invalid flags, having
6415 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6416 * DS flags set.
6417 */
6418static int nfs4_check_cl_exchange_flags(u32 flags)
6419{
6420 if (flags & ~EXCHGID4_FLAG_MASK_R)
6421 goto out_inval;
6422 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6423 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6424 goto out_inval;
6425 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6426 goto out_inval;
6427 return NFS_OK;
6428out_inval:
6429 return -NFS4ERR_INVAL;
6430}
6431
78fe0f41 6432static bool
79d4e1f0
CL		 6433nfs41_same_server_scope(struct nfs41_server_scope *a,
6434 struct nfs41_server_scope *b)
78fe0f41
WAA		 6435{
6436 if (a->server_scope_sz == b->server_scope_sz &&
6437 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6438 return true;
6439
6440 return false;
6441}
6442
7c44f1ae
WAA		 6443/*
6444 * nfs4_proc_bind_conn_to_session()
6445 *
6446 * The 4.1 client currently uses the same TCP connection for the
6447 * fore and backchannel.
6448 */
2cf047c9 6449int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6450{
6451 int status;
6452 struct nfs41_bind_conn_to_session_res res;
6453 struct rpc_message msg = {
6454 .rpc_proc =
6455 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6456 .rpc_argp = clp,
6457 .rpc_resp = &res,
2cf047c9 6458 .rpc_cred = cred,
7c44f1ae
WAA		 6459 };
6460
6461 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6462
6463 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6464 if (unlikely(res.session == NULL)) {
6465 status = -ENOMEM;
6466 goto out;
6467 }
6468
6469 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6470 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6471 if (status == 0) {
6472 if (memcmp(res.session->sess_id.data,
6473 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6474 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6475 status = -EIO;
6476 goto out_session;
6477 }
6478 if (res.dir != NFS4_CDFS4_BOTH) {
6479 dprintk("NFS: %s: Unexpected direction from server\n",
6480 __func__);
6481 status = -EIO;
6482 goto out_session;
6483 }
6484 if (res.use_conn_in_rdma_mode) {
6485 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6486 __func__);
6487 status = -EIO;
6488 goto out_session;
6489 }
6490 }
6491out_session:
6492 kfree(res.session);
6493out:
6494 dprintk("<-- %s status= %d\n", __func__, status);
6495 return status;
6496}
6497
99fe60d0 6498/*
fa940720
WAA		 6499 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6500 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6501 */
6502static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6503 .how = SP4_MACH_CRED,
6504 .enforce.u.words = {
6505 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6506 1 << (OP_EXCHANGE_ID - 32) |
6507 1 << (OP_CREATE_SESSION - 32) |
6508 1 << (OP_DESTROY_SESSION - 32) |
6509 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6510 },
6511 .allow.u.words = {
6512 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6513 1 << (OP_LOCKU) |
6514 1 << (OP_COMMIT),
8b5bee2e 6515 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6516 1 << (OP_SECINFO_NO_NAME - 32) |
6517 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6518 1 << (OP_FREE_STATEID - 32) |
6519 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6520 }
6521};
6522
6523/*
6524 * Select the state protection mode for client `clp' given the server results
6525 * from exchange_id in `sp'.
99fe60d0 6526 *
2031cd1a
WAA		 6527 * Returns 0 on success, negative errno otherwise.
6528 */
6529static int nfs4_sp4_select_mode(struct nfs_client *clp,
6530 struct nfs41_state_protection *sp)
6531{
6532 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6533 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6534 1 << (OP_EXCHANGE_ID - 32) |
6535 1 << (OP_CREATE_SESSION - 32) |
6536 1 << (OP_DESTROY_SESSION - 32) |
6537 1 << (OP_DESTROY_CLIENTID - 32)
6538 };
6539 unsigned int i;
6540
6541 if (sp->how == SP4_MACH_CRED) {
6542 /* Print state protect result */
6543 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6544 for (i = 0; i <= LAST_NFS4_OP; i++) {
6545 if (test_bit(i, sp->enforce.u.longs))
6546 dfprintk(MOUNT, " enforce op %d\n", i);
6547 if (test_bit(i, sp->allow.u.longs))
6548 dfprintk(MOUNT, " allow op %d\n", i);
6549 }
6550
6551 /* make sure nothing is on enforce list that isn't supported */
6552 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6553 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6554 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6555 return -EINVAL;
6556 }
6557 }
6558
6559 /*
6560 * Minimal mode - state operations are allowed to use machine
6561 * credential. Note this already happens by default, so the
6562 * client doesn't have to do anything more than the negotiation.
6563 *
6564 * NOTE: we don't care if EXCHANGE_ID is in the list -
6565 * we're already using the machine cred for exchange_id
6566 * and will never use a different cred.
6567 */
6568 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6569 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6570 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6571 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6572 dfprintk(MOUNT, "sp4_mach_cred:\n");
6573 dfprintk(MOUNT, " minimal mode enabled\n");
6574 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6575 } else {
6576 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6577 return -EINVAL;
6578 }
fa940720
WAA		 6579
6580 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6581 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6582 dfprintk(MOUNT, " cleanup mode enabled\n");
6583 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6584 }
8b5bee2e
WAA		 6585
6586 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6587 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6588 dfprintk(MOUNT, " secinfo mode enabled\n");
6589 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6590 }
3787d506
WAA		 6591
6592 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6593 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6594 dfprintk(MOUNT, " stateid mode enabled\n");
6595 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6596 }
8c21c62c
WAA		 6597
6598 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6599 dfprintk(MOUNT, " write mode enabled\n");
6600 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6601 }
6602
6603 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6604 dfprintk(MOUNT, " commit mode enabled\n");
6605 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6606 }
2031cd1a
WAA		 6607 }
6608
6609 return 0;
6610}
6611
6612/*
6613 * _nfs4_proc_exchange_id()
6bbb4ae8 6614 *
2031cd1a 6615 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6616 */
2031cd1a
WAA		 6617static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6618 u32 sp4_how)
99fe60d0
BH		 6619{
6620 nfs4_verifier verifier;
6621 struct nfs41_exchange_id_args args = {
cd93710e 6622 .verifier = &verifier,
99fe60d0 6623 .client = clp,
cd3fadec 6624#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6625 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6626 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6627 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6628#else
6629 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6630 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6631#endif
99fe60d0
BH		 6632 };
6633 struct nfs41_exchange_id_res res = {
32b01310 6634 0
99fe60d0
BH		 6635 };
6636 int status;
6637 struct rpc_message msg = {
6638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6639 .rpc_argp = &args,
6640 .rpc_resp = &res,
6641 .rpc_cred = cred,
6642 };
99fe60d0 6643
f092075d 6644 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6645 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6646 sizeof(args.id));
6bbb4ae8
CL		 6647 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6648 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6649 args.id_len, args.id);
99fe60d0 6650
acdeb69d 6651 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6652 GFP_NOFS);
acdeb69d 6653 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6654 status = -ENOMEM;
6655 goto out;
6656 }
78fe0f41 6657
79d4e1f0 6658 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6659 GFP_NOFS);
177313f1 6660 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6661 status = -ENOMEM;
acdeb69d 6662 goto out_server_owner;
abe9a6d5 6663 }
78fe0f41 6664
bbafffd2 6665 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6666 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6667 status = -ENOMEM;
6668 goto out_server_scope;
6669 }
6670
2031cd1a
WAA		 6671 switch (sp4_how) {
6672 case SP4_NONE:
6673 args.state_protect.how = SP4_NONE;
6674 break;
6675
6676 case SP4_MACH_CRED:
6677 args.state_protect = nfs4_sp4_mach_cred_request;
6678 break;
6679
6680 default:
6681 /* unsupported! */
6682 WARN_ON_ONCE(1);
6683 status = -EINVAL;
6684 goto out_server_scope;
6685 }
6686
1bd714f2 6687 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6688 trace_nfs4_exchange_id(clp, status);
177313f1 6689 if (status == 0)
32b01310 6690 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6691
2031cd1a
WAA		 6692 if (status == 0)
6693 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6694
acdeb69d 6695 if (status == 0) {
32b01310
TM		 6696 clp->cl_clientid = res.clientid;
6697 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6698 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6699 clp->cl_seqid = res.seqid;
6700
acdeb69d
CL		 6701 kfree(clp->cl_serverowner);
6702 clp->cl_serverowner = res.server_owner;
6703 res.server_owner = NULL;
78fe0f41 6704
7d2ed9ac 6705 /* use the most recent implementation id */
59155546
CL		 6706 kfree(clp->cl_implid);
6707 clp->cl_implid = res.impl_id;
7d2ed9ac 6708
177313f1 6709 if (clp->cl_serverscope != NULL &&
79d4e1f0 6710 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6711 res.server_scope)) {
6712 dprintk("%s: server_scope mismatch detected\n",
6713 __func__);
6714 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6715 kfree(clp->cl_serverscope);
6716 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6717 }
6718
177313f1 6719 if (clp->cl_serverscope == NULL) {
79d4e1f0 6720 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6721 goto out;
6722 }
32b01310
TM		 6723 } else
6724 kfree(res.impl_id);
7d2ed9ac 6725
acdeb69d
CL		 6726out_server_owner:
6727 kfree(res.server_owner);
7d2ed9ac 6728out_server_scope:
abe9a6d5
WAA		 6729 kfree(res.server_scope);
6730out:
177313f1 6731 if (clp->cl_implid != NULL)
6bbb4ae8 6732 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6733 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6734 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6735 clp->cl_implid->date.seconds,
6736 clp->cl_implid->date.nseconds);
6bbb4ae8 6737 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6738 return status;
6739}
6740
2031cd1a
WAA		 6741/*
6742 * nfs4_proc_exchange_id()
6743 *
6744 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6745 *
6746 * Since the clientid has expired, all compounds using sessions
6747 * associated with the stale clientid will be returning
6748 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6749 * be in some phase of session reset.
6750 *
6751 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6752 */
6753int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6754{
6755 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6756 int status;
6757
6758 /* try SP4_MACH_CRED if krb5i/p */
6759 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6760 authflavor == RPC_AUTH_GSS_KRB5P) {
6761 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6762 if (!status)
6763 return 0;
6764 }
6765
6766 /* try SP4_NONE */
6767 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6768}
6769
66245539
TM		 6770static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6771 struct rpc_cred *cred)
6772{
6773 struct rpc_message msg = {
6774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6775 .rpc_argp = clp,
6776 .rpc_cred = cred,
6777 };
6778 int status;
6779
6780 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6781 trace_nfs4_destroy_clientid(clp, status);
66245539 6782 if (status)
02c67525 6783 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6784 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6785 return status;
6786}
6787
6788static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6789 struct rpc_cred *cred)
6790{
6791 unsigned int loop;
6792 int ret;
6793
6794 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6795 ret = _nfs4_proc_destroy_clientid(clp, cred);
6796 switch (ret) {
6797 case -NFS4ERR_DELAY:
6798 case -NFS4ERR_CLIENTID_BUSY:
6799 ssleep(1);
6800 break;
6801 default:
6802 return ret;
6803 }
6804 }
6805 return 0;
6806}
6807
6808int nfs4_destroy_clientid(struct nfs_client *clp)
6809{
6810 struct rpc_cred *cred;
6811 int ret = 0;
6812
6813 if (clp->cl_mvops->minor_version < 1)
6814 goto out;
6815 if (clp->cl_exchange_flags == 0)
6816 goto out;
05f4c350
CL		 6817 if (clp->cl_preserve_clid)
6818 goto out;
73d8bde5 6819 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6820 ret = nfs4_proc_destroy_clientid(clp, cred);
6821 if (cred)
6822 put_rpccred(cred);
6823 switch (ret) {
6824 case 0:
6825 case -NFS4ERR_STALE_CLIENTID:
6826 clp->cl_exchange_flags = 0;
6827 }
6828out:
6829 return ret;
6830}
6831
2050f0cc
AA		 6832struct nfs4_get_lease_time_data {
6833 struct nfs4_get_lease_time_args *args;
6834 struct nfs4_get_lease_time_res *res;
6835 struct nfs_client *clp;
6836};
6837
6838static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6839 void *calldata)
6840{
2050f0cc
AA		 6841 struct nfs4_get_lease_time_data *data =
6842 (struct nfs4_get_lease_time_data *)calldata;
6843
6844 dprintk("--> %s\n", __func__);
6845 /* just setup sequence, do not trigger session recovery
6846 since we're invoked within one */
d9afbd1b
TM		 6847 nfs41_setup_sequence(data->clp->cl_session,
6848 &data->args->la_seq_args,
6849 &data->res->lr_seq_res,
6850 task);
2050f0cc
AA		 6851 dprintk("<-- %s\n", __func__);
6852}
6853
6854/*
6855 * Called from nfs4_state_manager thread for session setup, so don't recover
6856 * from sequence operation or clientid errors.
6857 */
6858static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6859{
6860 struct nfs4_get_lease_time_data *data =
6861 (struct nfs4_get_lease_time_data *)calldata;
6862
6863 dprintk("--> %s\n", __func__);
14516c3a
TM		 6864 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6865 return;
2050f0cc
AA		 6866 switch (task->tk_status) {
6867 case -NFS4ERR_DELAY:
6868 case -NFS4ERR_GRACE:
6869 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6870 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6871 task->tk_status = 0;
a8a4ae3a
AA		 6872 /* fall through */
6873 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6874 rpc_restart_call_prepare(task);
2050f0cc
AA		 6875 return;
6876 }
2050f0cc
AA		 6877 dprintk("<-- %s\n", __func__);
6878}
6879
17280175 6880static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6881 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6882 .rpc_call_done = nfs4_get_lease_time_done,
6883};
6884
6885int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6886{
6887 struct rpc_task *task;
6888 struct nfs4_get_lease_time_args args;
6889 struct nfs4_get_lease_time_res res = {
6890 .lr_fsinfo = fsinfo,
6891 };
6892 struct nfs4_get_lease_time_data data = {
6893 .args = &args,
6894 .res = &res,
6895 .clp = clp,
6896 };
6897 struct rpc_message msg = {
6898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6899 .rpc_argp = &args,
6900 .rpc_resp = &res,
6901 };
6902 struct rpc_task_setup task_setup = {
6903 .rpc_client = clp->cl_rpcclient,
6904 .rpc_message = &msg,
6905 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6906 .callback_data = &data,
6907 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6908 };
6909 int status;
6910
a9c92d6b 6911 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6912 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6913 dprintk("--> %s\n", __func__);
6914 task = rpc_run_task(&task_setup);
6915
6916 if (IS_ERR(task))
6917 status = PTR_ERR(task);
6918 else {
6919 status = task->tk_status;
6920 rpc_put_task(task);
6921 }
6922 dprintk("<-- %s return %d\n", __func__, status);
6923
6924 return status;
6925}
6926
fc931582
AA		 6927/*
6928 * Initialize the values to be used by the client in CREATE_SESSION
6929 * If nfs4_init_session set the fore channel request and response sizes,
6930 * use them.
6931 *
6932 * Set the back channel max_resp_sz_cached to zero to force the client to
6933 * always set csa_cachethis to FALSE because the current implementation
6934 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6935 */
6936static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6937{
18aad3d5
AA		 6938 unsigned int max_rqst_sz, max_resp_sz;
6939
6940 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6941 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6942
fc931582 6943 /* Fore channel attributes */
18aad3d5
AA		 6944 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6945 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6946 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6947 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6948
6949 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6950 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6951 __func__,
6952 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6953 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6954
6955 /* Back channel attributes */
fc931582
AA		 6956 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6957 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6958 args->bc_attrs.max_resp_sz_cached = 0;
6959 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6960 args->bc_attrs.max_reqs = 1;
6961
6962 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6963 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6964 __func__,
6965 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6966 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6967 args->bc_attrs.max_reqs);
6968}
6969
43c2e885 6970static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6971{
43c2e885
BF		 6972 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6973 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6974
43c2e885
BF		 6975 if (rcvd->max_resp_sz > sent->max_resp_sz)
6976 return -EINVAL;
6977 /*
6978 * Our requested max_ops is the minimum we need; we're not
6979 * prepared to break up compounds into smaller pieces than that.
6980 * So, no point even trying to continue if the server won't
6981 * cooperate:
6982 */
6983 if (rcvd->max_ops < sent->max_ops)
6984 return -EINVAL;
6985 if (rcvd->max_reqs == 0)
6986 return -EINVAL;
b4b9a0c1
VG		 6987 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6988 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6989 return 0;
8d35301d
AA		 6990}
6991
43c2e885
BF		 6992static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6993{
6994 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6995 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6996
43c2e885
BF		 6997 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6998 return -EINVAL;
6999 if (rcvd->max_resp_sz < sent->max_resp_sz)
7000 return -EINVAL;
7001 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7002 return -EINVAL;
7003 /* These would render the backchannel useless: */
b4b9a0c1 7004 if (rcvd->max_ops != sent->max_ops)
43c2e885 7005 return -EINVAL;
b4b9a0c1 7006 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7007 return -EINVAL;
7008 return 0;
7009}
8d35301d 7010
8d35301d
AA		 7011static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7012 struct nfs4_session *session)
7013{
43c2e885 7014 int ret;
8d35301d 7015
43c2e885
BF		 7016 ret = nfs4_verify_fore_channel_attrs(args, session);
7017 if (ret)
7018 return ret;
7019 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7020}
7021
848f5bda
TM		 7022static int _nfs4_proc_create_session(struct nfs_client *clp,
7023 struct rpc_cred *cred)
fc931582
AA		 7024{
7025 struct nfs4_session *session = clp->cl_session;
7026 struct nfs41_create_session_args args = {
7027 .client = clp,
7028 .cb_program = NFS4_CALLBACK,
7029 };
7030 struct nfs41_create_session_res res = {
7031 .client = clp,
7032 };
7033 struct rpc_message msg = {
7034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7035 .rpc_argp = &args,
7036 .rpc_resp = &res,
848f5bda 7037 .rpc_cred = cred,
fc931582
AA		 7038 };
7039 int status;
7040
7041 nfs4_init_channel_attrs(&args);
0f91421e 7042 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7043
1bd714f2 7044 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7045 trace_nfs4_create_session(clp, status);
fc931582 7046
43095d39 7047 if (!status) {
8d35301d
AA		 7048 /* Verify the session's negotiated channel_attrs values */
7049 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7050 /* Increment the clientid slot sequence id */
7051 clp->cl_seqid++;
7052 }
7053
7054 return status;
7055}
7056
7057/*
7058 * Issues a CREATE_SESSION operation to the server.
7059 * It is the responsibility of the caller to verify the session is
7060 * expired before calling this routine.
7061 */
848f5bda 7062int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7063{
7064 int status;
7065 unsigned *ptr;
fc931582
AA		 7066 struct nfs4_session *session = clp->cl_session;
7067
7068 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7069
848f5bda 7070 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7071 if (status)
7072 goto out;
7073
aacd5537
AA		 7074 /* Init or reset the session slot tables */
7075 status = nfs4_setup_session_slot_tables(session);
7076 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7077 if (status)
7078 goto out;
7079
7080 ptr = (unsigned *)&session->sess_id.data[0];
7081 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7082 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7083out:
7084 dprintk("<-- %s\n", __func__);
7085 return status;
7086}
7087
0f3e66c6
AA		 7088/*
7089 * Issue the over-the-wire RPC DESTROY_SESSION.
7090 * The caller must serialize access to this routine.
7091 */
848f5bda
TM		 7092int nfs4_proc_destroy_session(struct nfs4_session *session,
7093 struct rpc_cred *cred)
0f3e66c6 7094{
848f5bda
TM		 7095 struct rpc_message msg = {
7096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7097 .rpc_argp = session,
7098 .rpc_cred = cred,
7099 };
0f3e66c6 7100 int status = 0;
0f3e66c6
AA		 7101
7102 dprintk("--> nfs4_proc_destroy_session\n");
7103
7104 /* session is still being setup */
7105 if (session->clp->cl_cons_state != NFS_CS_READY)
7106 return status;
7107
1bd714f2 7108 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7109 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7110
7111 if (status)
08106ac7 7112 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7113 "Session has been destroyed regardless...\n", status);
7114
7115 dprintk("<-- nfs4_proc_destroy_session\n");
7116 return status;
7117}
7118
fc01cea9
AA		 7119/*
7120 * Renew the cl_session lease.
7121 */
d5f8d3fe
TM		 7122struct nfs4_sequence_data {
7123 struct nfs_client *clp;
7124 struct nfs4_sequence_args args;
7125 struct nfs4_sequence_res res;
7126};
7127
dc96aef9
AB		 7128static void nfs41_sequence_release(void *data)
7129{
d5f8d3fe
TM		 7130 struct nfs4_sequence_data *calldata = data;
7131 struct nfs_client *clp = calldata->clp;
dc96aef9 7132
7135840f
AB		 7133 if (atomic_read(&clp->cl_count) > 1)
7134 nfs4_schedule_state_renewal(clp);
7135 nfs_put_client(clp);
d5f8d3fe 7136 kfree(calldata);
dc96aef9
AB		 7137}
7138
aa5190d0
TM		 7139static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7140{
7141 switch(task->tk_status) {
7142 case -NFS4ERR_DELAY:
aa5190d0
TM		 7143 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7144 return -EAGAIN;
7145 default:
0400a6b0 7146 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7147 }
7148 return 0;
7149}
7150
dc96aef9 7151static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7152{
d5f8d3fe
TM		 7153 struct nfs4_sequence_data *calldata = data;
7154 struct nfs_client *clp = calldata->clp;
fc01cea9 7155
14516c3a
TM		 7156 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7157 return;
fc01cea9 7158
c6d01c6f 7159 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7160 if (task->tk_status < 0) {
7161 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7162 if (atomic_read(&clp->cl_count) == 1)
7163 goto out;
fc01cea9 7164
aa5190d0
TM		 7165 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7166 rpc_restart_call_prepare(task);
fc01cea9
AA		 7167 return;
7168 }
7169 }
fc01cea9 7170 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7171out:
fc01cea9
AA		 7172 dprintk("<-- %s\n", __func__);
7173}
7174
7175static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7176{
d5f8d3fe
TM		 7177 struct nfs4_sequence_data *calldata = data;
7178 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7179 struct nfs4_sequence_args *args;
7180 struct nfs4_sequence_res *res;
7181
fc01cea9
AA		 7182 args = task->tk_msg.rpc_argp;
7183 res = task->tk_msg.rpc_resp;
7184
d9afbd1b 7185 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7186}
7187
7188static const struct rpc_call_ops nfs41_sequence_ops = {
7189 .rpc_call_done = nfs41_sequence_call_done,
7190 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7191 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7192};
7193
8fe72bac
TM		 7194static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7195 struct rpc_cred *cred,
7196 bool is_privileged)
fc01cea9 7197{
d5f8d3fe 7198 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7199 struct rpc_message msg = {
7200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7201 .rpc_cred = cred,
7202 };
71ac6da9
TM		 7203 struct rpc_task_setup task_setup_data = {
7204 .rpc_client = clp->cl_rpcclient,
7205 .rpc_message = &msg,
8fe72bac 7206 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7207 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7208 };
fc01cea9 7209
7135840f 7210 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7211 return ERR_PTR(-EIO);
dfb4f309 7212 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7213 if (calldata == NULL) {
7135840f 7214 nfs_put_client(clp);
71ac6da9 7215 return ERR_PTR(-ENOMEM);
fc01cea9 7216 }
a9c92d6b 7217 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7218 if (is_privileged)
7219 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7220 msg.rpc_argp = &calldata->args;
7221 msg.rpc_resp = &calldata->res;
7222 calldata->clp = clp;
71ac6da9 7223 task_setup_data.callback_data = calldata;
fc01cea9 7224
71ac6da9
TM		 7225 return rpc_run_task(&task_setup_data);
7226}
7227
2f60ea6b 7228static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7229{
7230 struct rpc_task *task;
7231 int ret = 0;
7232
2f60ea6b
TM		 7233 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7234 return 0;
8fe72bac 7235 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7236 if (IS_ERR(task))
7237 ret = PTR_ERR(task);
7238 else
bf294b41 7239 rpc_put_task_async(task);
71ac6da9
TM		 7240 dprintk("<-- %s status=%d\n", __func__, ret);
7241 return ret;
7242}
7243
7244static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7245{
7246 struct rpc_task *task;
7247 int ret;
7248
8fe72bac 7249 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7250 if (IS_ERR(task)) {
7251 ret = PTR_ERR(task);
7252 goto out;
7253 }
7254 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7255 if (!ret) {
7256 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7257
7258 if (task->tk_status == 0)
7259 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7260 ret = task->tk_status;
b4410c2f 7261 }
71ac6da9
TM		 7262 rpc_put_task(task);
7263out:
7264 dprintk("<-- %s status=%d\n", __func__, ret);
7265 return ret;
fc01cea9
AA		 7266}
7267
fce5c838
RL		 7268struct nfs4_reclaim_complete_data {
7269 struct nfs_client *clp;
7270 struct nfs41_reclaim_complete_args arg;
7271 struct nfs41_reclaim_complete_res res;
7272};
7273
7274static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7275{
7276 struct nfs4_reclaim_complete_data *calldata = data;
7277
d9afbd1b
TM		 7278 nfs41_setup_sequence(calldata->clp->cl_session,
7279 &calldata->arg.seq_args,
7280 &calldata->res.seq_res,
7281 task);
fce5c838
RL		 7282}
7283
aa5190d0
TM		 7284static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7285{
7286 switch(task->tk_status) {
7287 case 0:
7288 case -NFS4ERR_COMPLETE_ALREADY:
7289 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7290 break;
7291 case -NFS4ERR_DELAY:
aa5190d0 7292 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7293 /* fall through */
7294 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7295 return -EAGAIN;
7296 default:
0400a6b0 7297 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7298 }
7299 return 0;
7300}
7301
fce5c838
RL		 7302static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7303{
7304 struct nfs4_reclaim_complete_data *calldata = data;
7305 struct nfs_client *clp = calldata->clp;
7306 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7307
7308 dprintk("--> %s\n", __func__);
14516c3a
TM		 7309 if (!nfs41_sequence_done(task, res))
7310 return;
fce5c838 7311
c6d01c6f 7312 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7313 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7314 rpc_restart_call_prepare(task);
7315 return;
7316 }
fce5c838
RL		 7317 dprintk("<-- %s\n", __func__);
7318}
7319
7320static void nfs4_free_reclaim_complete_data(void *data)
7321{
7322 struct nfs4_reclaim_complete_data *calldata = data;
7323
7324 kfree(calldata);
7325}
7326
7327static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7328 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7329 .rpc_call_done = nfs4_reclaim_complete_done,
7330 .rpc_release = nfs4_free_reclaim_complete_data,
7331};
7332
7333/*
7334 * Issue a global reclaim complete.
7335 */
965e9c23
TM		 7336static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7337 struct rpc_cred *cred)
fce5c838
RL		 7338{
7339 struct nfs4_reclaim_complete_data *calldata;
7340 struct rpc_task *task;
7341 struct rpc_message msg = {
7342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7343 .rpc_cred = cred,
fce5c838
RL		 7344 };
7345 struct rpc_task_setup task_setup_data = {
7346 .rpc_client = clp->cl_rpcclient,
7347 .rpc_message = &msg,
7348 .callback_ops = &nfs4_reclaim_complete_call_ops,
7349 .flags = RPC_TASK_ASYNC,
7350 };
7351 int status = -ENOMEM;
7352
7353 dprintk("--> %s\n", __func__);
8535b2be 7354 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7355 if (calldata == NULL)
7356 goto out;
7357 calldata->clp = clp;
7358 calldata->arg.one_fs = 0;
fce5c838 7359
a9c92d6b 7360 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7361 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7362 msg.rpc_argp = &calldata->arg;
7363 msg.rpc_resp = &calldata->res;
7364 task_setup_data.callback_data = calldata;
7365 task = rpc_run_task(&task_setup_data);
acf82b85 7366 if (IS_ERR(task)) {
fce5c838 7367 status = PTR_ERR(task);
acf82b85
DC		 7368 goto out;
7369 }
c34c32ea
AA		 7370 status = nfs4_wait_for_completion_rpc_task(task);
7371 if (status == 0)
7372 status = task->tk_status;
fce5c838 7373 rpc_put_task(task);
acf82b85 7374 return 0;
fce5c838
RL		 7375out:
7376 dprintk("<-- %s status=%d\n", __func__, status);
7377 return status;
7378}
b1f69b75
AA		 7379
7380static void
7381nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7382{
7383 struct nfs4_layoutget *lgp = calldata;
c31663d4 7384 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7385 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7386
7387 dprintk("--> %s\n", __func__);
c31663d4
FI		 7388 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7389 * right now covering the LAYOUTGET we are about to send.
7390 * However, that is not so catastrophic, and there seems
7391 * to be no way to prevent it completely.
7392 */
6ba7db34 7393 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7394 &lgp->res.seq_res, task))
b1f69b75 7395 return;
cf7d63f1
FI		 7396 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7397 NFS_I(lgp->args.inode)->layout,
7398 lgp->args.ctx->state)) {
7399 rpc_exit(task, NFS4_OK);
cf7d63f1 7400 }
b1f69b75
AA		 7401}
7402
7403static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7404{
7405 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7406 struct inode *inode = lgp->args.inode;
7407 struct nfs_server *server = NFS_SERVER(inode);
7408 struct pnfs_layout_hdr *lo;
7409 struct nfs4_state *state = NULL;
30005121 7410 unsigned long timeo, giveup;
b1f69b75
AA		 7411
7412 dprintk("--> %s\n", __func__);
7413
6ba7db34 7414 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7415 goto out;
b1f69b75
AA		 7416
7417 switch (task->tk_status) {
7418 case 0:
ee314c2a 7419 goto out;
b1f69b75
AA		 7420 case -NFS4ERR_LAYOUTTRYLATER:
7421 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7422 timeo = rpc_get_timeout(task->tk_client);
7423 giveup = lgp->args.timestamp + timeo;
7424 if (time_after(giveup, jiffies))
7425 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7426 break;
7427 case -NFS4ERR_EXPIRED:
7428 case -NFS4ERR_BAD_STATEID:
7429 spin_lock(&inode->i_lock);
7430 lo = NFS_I(inode)->layout;
7431 if (!lo || list_empty(&lo->plh_segs)) {
7432 spin_unlock(&inode->i_lock);
7433 /* If the open stateid was bad, then recover it. */
7434 state = lgp->args.ctx->state;
7435 } else {
7436 LIST_HEAD(head);
7437
7438 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7439 spin_unlock(&inode->i_lock);
7440 /* Mark the bad layout state as invalid, then
7441 * retry using the open stateid. */
7442 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7443 }
7444 }
ee314c2a
TM		 7445 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7446 rpc_restart_call_prepare(task);
7447out:
b1f69b75
AA		 7448 dprintk("<-- %s\n", __func__);
7449}
7450
8554116e
IK		 7451static size_t max_response_pages(struct nfs_server *server)
7452{
7453 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7454 return nfs_page_array_len(0, max_resp_sz);
7455}
7456
7457static void nfs4_free_pages(struct page **pages, size_t size)
7458{
7459 int i;
7460
7461 if (!pages)
7462 return;
7463
7464 for (i = 0; i < size; i++) {
7465 if (!pages[i])
7466 break;
7467 __free_page(pages[i]);
7468 }
7469 kfree(pages);
7470}
7471
7472static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7473{
7474 struct page **pages;
7475 int i;
7476
7477 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7478 if (!pages) {
7479 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7480 return NULL;
7481 }
7482
7483 for (i = 0; i < size; i++) {
7484 pages[i] = alloc_page(gfp_flags);
7485 if (!pages[i]) {
7486 dprintk("%s: failed to allocate page\n", __func__);
7487 nfs4_free_pages(pages, size);
7488 return NULL;
7489 }
7490 }
7491
7492 return pages;
7493}
7494
b1f69b75
AA		 7495static void nfs4_layoutget_release(void *calldata)
7496{
7497 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7498 struct inode *inode = lgp->args.inode;
7499 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7500 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7501
7502 dprintk("--> %s\n", __func__);
8554116e 7503 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7504 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7505 put_nfs_open_context(lgp->args.ctx);
7506 kfree(calldata);
7507 dprintk("<-- %s\n", __func__);
7508}
7509
7510static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7511 .rpc_call_prepare = nfs4_layoutget_prepare,
7512 .rpc_call_done = nfs4_layoutget_done,
7513 .rpc_release = nfs4_layoutget_release,
7514};
7515
a0b0a6e3
TM		 7516struct pnfs_layout_segment *
7517nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7518{
a47970ff
WAA		 7519 struct inode *inode = lgp->args.inode;
7520 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7521 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7522 struct rpc_task *task;
7523 struct rpc_message msg = {
7524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7525 .rpc_argp = &lgp->args,
7526 .rpc_resp = &lgp->res,
6ab59344 7527 .rpc_cred = lgp->cred,
b1f69b75
AA		 7528 };
7529 struct rpc_task_setup task_setup_data = {
7530 .rpc_client = server->client,
7531 .rpc_message = &msg,
7532 .callback_ops = &nfs4_layoutget_call_ops,
7533 .callback_data = lgp,
7534 .flags = RPC_TASK_ASYNC,
7535 };
a0b0a6e3 7536 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7537 int status = 0;
7538
7539 dprintk("--> %s\n", __func__);
7540
8554116e
IK		 7541 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7542 if (!lgp->args.layout.pages) {
7543 nfs4_layoutget_release(lgp);
a0b0a6e3 7544 return ERR_PTR(-ENOMEM);
8554116e
IK		 7545 }
7546 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7547 lgp->args.timestamp = jiffies;
8554116e 7548
35124a09 7549 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7550 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7551 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7552
7553 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7554 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7555
b1f69b75
AA		 7556 task = rpc_run_task(&task_setup_data);
7557 if (IS_ERR(task))
a0b0a6e3 7558 return ERR_CAST(task);
b1f69b75 7559 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7560 if (status == 0)
7561 status = task->tk_status;
1037e6ea
TM		 7562 trace_nfs4_layoutget(lgp->args.ctx,
7563 &lgp->args.range,
7564 &lgp->res.range,
7565 status);
085b7a45
WAA		 7566 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7567 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7568 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7569 rpc_put_task(task);
7570 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7571 if (status)
7572 return ERR_PTR(status);
7573 return lseg;
b1f69b75
AA		 7574}
7575
cbe82603
BH		 7576static void
7577nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7578{
7579 struct nfs4_layoutreturn *lrp = calldata;
7580
7581 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7582 nfs41_setup_sequence(lrp->clp->cl_session,
7583 &lrp->args.seq_args,
7584 &lrp->res.seq_res,
7585 task);
cbe82603
BH		 7586}
7587
7588static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7589{
7590 struct nfs4_layoutreturn *lrp = calldata;
7591 struct nfs_server *server;
7592
7593 dprintk("--> %s\n", __func__);
7594
6ba7db34 7595 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7596 return;
7597
7598 server = NFS_SERVER(lrp->args.inode);
7599 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7600 rpc_restart_call_prepare(task);
cbe82603
BH		 7601 return;
7602 }
cbe82603
BH		 7603 dprintk("<-- %s\n", __func__);
7604}
7605
7606static void nfs4_layoutreturn_release(void *calldata)
7607{
7608 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7609 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7610
7611 dprintk("--> %s\n", __func__);
849b286f
TM		 7612 spin_lock(&lo->plh_inode->i_lock);
7613 if (lrp->res.lrs_present)
7614 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7615 lo->plh_block_lgets--;
7616 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7617 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7618 kfree(calldata);
7619 dprintk("<-- %s\n", __func__);
7620}
7621
7622static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7623 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7624 .rpc_call_done = nfs4_layoutreturn_done,
7625 .rpc_release = nfs4_layoutreturn_release,
7626};
7627
7628int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7629{
7630 struct rpc_task *task;
7631 struct rpc_message msg = {
7632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7633 .rpc_argp = &lrp->args,
7634 .rpc_resp = &lrp->res,
9556000d 7635 .rpc_cred = lrp->cred,
cbe82603
BH		 7636 };
7637 struct rpc_task_setup task_setup_data = {
1771c577 7638 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7639 .rpc_message = &msg,
7640 .callback_ops = &nfs4_layoutreturn_call_ops,
7641 .callback_data = lrp,
7642 };
7643 int status;
7644
7645 dprintk("--> %s\n", __func__);
a9c92d6b 7646 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7647 task = rpc_run_task(&task_setup_data);
7648 if (IS_ERR(task))
7649 return PTR_ERR(task);
7650 status = task->tk_status;
1037e6ea 7651 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7652 dprintk("<-- %s status=%d\n", __func__, status);
7653 rpc_put_task(task);
7654 return status;
7655}
7656
7f11d8d3
AA		 7657/*
7658 * Retrieve the list of Data Server devices from the MDS.
7659 */
7660static int _nfs4_getdevicelist(struct nfs_server *server,
7661 const struct nfs_fh *fh,
7662 struct pnfs_devicelist *devlist)
7663{
7664 struct nfs4_getdevicelist_args args = {
7665 .fh = fh,
7666 .layoutclass = server->pnfs_curr_ld->id,
7667 };
7668 struct nfs4_getdevicelist_res res = {
7669 .devlist = devlist,
7670 };
7671 struct rpc_message msg = {
7672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7673 .rpc_argp = &args,
7674 .rpc_resp = &res,
7675 };
7676 int status;
7677
7678 dprintk("--> %s\n", __func__);
7679 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7680 &res.seq_res, 0);
7681 dprintk("<-- %s status=%d\n", __func__, status);
7682 return status;
7683}
7684
7685int nfs4_proc_getdevicelist(struct nfs_server *server,
7686 const struct nfs_fh *fh,
7687 struct pnfs_devicelist *devlist)
7688{
7689 struct nfs4_exception exception = { };
7690 int err;
7691
7692 do {
7693 err = nfs4_handle_exception(server,
7694 _nfs4_getdevicelist(server, fh, devlist),
7695 &exception);
7696 } while (exception.retry);
7697
7698 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7699 err, devlist->num_devs);
7700
7701 return err;
7702}
7703EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7704
b1f69b75 7705static int
cd5875fe
TM		 7706_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7707 struct pnfs_device *pdev,
7708 struct rpc_cred *cred)
b1f69b75
AA		 7709{
7710 struct nfs4_getdeviceinfo_args args = {
7711 .pdev = pdev,
7712 };
7713 struct nfs4_getdeviceinfo_res res = {
7714 .pdev = pdev,
7715 };
7716 struct rpc_message msg = {
7717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7718 .rpc_argp = &args,
7719 .rpc_resp = &res,
cd5875fe 7720 .rpc_cred = cred,
b1f69b75
AA		 7721 };
7722 int status;
7723
7724 dprintk("--> %s\n", __func__);
7c513058 7725 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7726 dprintk("<-- %s status=%d\n", __func__, status);
7727
7728 return status;
7729}
7730
cd5875fe
TM		 7731int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7732 struct pnfs_device *pdev,
7733 struct rpc_cred *cred)
b1f69b75
AA		 7734{
7735 struct nfs4_exception exception = { };
7736 int err;
7737
7738 do {
7739 err = nfs4_handle_exception(server,
cd5875fe 7740 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7741 &exception);
7742 } while (exception.retry);
7743 return err;
7744}
7745EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7746
863a3c6c
AA		 7747static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7748{
7749 struct nfs4_layoutcommit_data *data = calldata;
7750 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7751 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7752
d9afbd1b
TM		 7753 nfs41_setup_sequence(session,
7754 &data->args.seq_args,
7755 &data->res.seq_res,
7756 task);
863a3c6c
AA		 7757}
7758
7759static void
7760nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7761{
7762 struct nfs4_layoutcommit_data *data = calldata;
7763 struct nfs_server *server = NFS_SERVER(data->args.inode);
7764
6ba7db34 7765 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7766 return;
7767
7768 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7769 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7770 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7771 case -NFS4ERR_BADLAYOUT: /* no layout */
7772 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7773 task->tk_status = 0;
e59d27e0
TM		 7774 break;
7775 case 0:
863a3c6c
AA		 7776 nfs_post_op_update_inode_force_wcc(data->args.inode,
7777 data->res.fattr);
e59d27e0
TM		 7778 break;
7779 default:
7780 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7781 rpc_restart_call_prepare(task);
7782 return;
7783 }
7784 }
863a3c6c
AA		 7785}
7786
7787static void nfs4_layoutcommit_release(void *calldata)
7788{
7789 struct nfs4_layoutcommit_data *data = calldata;
7790
db29c089 7791 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7792 put_rpccred(data->cred);
7793 kfree(data);
7794}
7795
7796static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7797 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7798 .rpc_call_done = nfs4_layoutcommit_done,
7799 .rpc_release = nfs4_layoutcommit_release,
7800};
7801
7802int
ef311537 7803nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7804{
7805 struct rpc_message msg = {
7806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7807 .rpc_argp = &data->args,
7808 .rpc_resp = &data->res,
7809 .rpc_cred = data->cred,
7810 };
7811 struct rpc_task_setup task_setup_data = {
7812 .task = &data->task,
7813 .rpc_client = NFS_CLIENT(data->args.inode),
7814 .rpc_message = &msg,
7815 .callback_ops = &nfs4_layoutcommit_ops,
7816 .callback_data = data,
7817 .flags = RPC_TASK_ASYNC,
7818 };
7819 struct rpc_task *task;
7820 int status = 0;
7821
7822 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7823 "lbw: %llu inode %lu\n",
7824 data->task.tk_pid, sync,
7825 data->args.lastbytewritten,
7826 data->args.inode->i_ino);
7827
a9c92d6b 7828 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7829 task = rpc_run_task(&task_setup_data);
7830 if (IS_ERR(task))
7831 return PTR_ERR(task);
ef311537 7832 if (sync == false)
863a3c6c
AA		 7833 goto out;
7834 status = nfs4_wait_for_completion_rpc_task(task);
7835 if (status != 0)
7836 goto out;
7837 status = task->tk_status;
1037e6ea 7838 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7839out:
7840 dprintk("%s: status %d\n", __func__, status);
7841 rpc_put_task(task);
7842 return status;
7843}
fca78d6d 7844
97431204
AA		 7845/**
7846 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7847 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7848 */
fca78d6d
BS		 7849static int
7850_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7851 struct nfs_fsinfo *info,
7852 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7853{
7854 struct nfs41_secinfo_no_name_args args = {
7855 .style = SECINFO_STYLE_CURRENT_FH,
7856 };
7857 struct nfs4_secinfo_res res = {
7858 .flavors = flavors,
7859 };
7860 struct rpc_message msg = {
7861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7862 .rpc_argp = &args,
7863 .rpc_resp = &res,
7864 };
b1b3e136 7865 struct rpc_clnt *clnt = server->client;
7cb852df 7866 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7867 int status;
7868
7869 if (use_integrity) {
7870 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7871 cred = nfs4_get_clid_cred(server->nfs_client);
7872 msg.rpc_cred = cred;
b1b3e136
WAA		 7873 }
7874
7875 dprintk("--> %s\n", __func__);
7876 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7877 &res.seq_res, 0);
7878 dprintk("<-- %s status=%d\n", __func__, status);
7879
7cb852df
WAA		 7880 if (cred)
7881 put_rpccred(cred);
b1b3e136
WAA		 7882
7883 return status;
fca78d6d
BS		 7884}
7885
7886static int
7887nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7888 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7889{
7890 struct nfs4_exception exception = { };
7891 int err;
7892 do {
b1b3e136
WAA		 7893 /* first try using integrity protection */
7894 err = -NFS4ERR_WRONGSEC;
7895
7896 /* try to use integrity protection with machine cred */
7897 if (_nfs4_is_integrity_protected(server->nfs_client))
7898 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7899 flavors, true);
7900
7901 /*
7902 * if unable to use integrity protection, or SECINFO with
7903 * integrity protection returns NFS4ERR_WRONGSEC (which is
7904 * disallowed by spec, but exists in deployed servers) use
7905 * the current filesystem's rpc_client and the user cred.
7906 */
7907 if (err == -NFS4ERR_WRONGSEC)
7908 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7909 flavors, false);
7910
fca78d6d
BS		 7911 switch (err) {
7912 case 0:
7913 case -NFS4ERR_WRONGSEC:
7914 case -NFS4ERR_NOTSUPP:
05e9cfb4 7915 goto out;
fca78d6d
BS		 7916 default:
7917 err = nfs4_handle_exception(server, err, &exception);
7918 }
7919 } while (exception.retry);
05e9cfb4 7920out:
fca78d6d
BS		 7921 return err;
7922}
7923
7924static int
7925nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7926 struct nfs_fsinfo *info)
7927{
7928 int err;
7929 struct page *page;
367156d9 7930 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7931 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7932 struct nfs4_secinfo4 *secinfo;
7933 int i;
fca78d6d
BS		 7934
7935 page = alloc_page(GFP_KERNEL);
7936 if (!page) {
7937 err = -ENOMEM;
7938 goto out;
7939 }
7940
7941 flavors = page_address(page);
7942 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7943
7944 /*
7945 * Fall back on "guess and check" method if
7946 * the server doesn't support SECINFO_NO_NAME
7947 */
7948 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7949 err = nfs4_find_root_sec(server, fhandle, info);
7950 goto out_freepage;
7951 }
7952 if (err)
7953 goto out_freepage;
7954
58a8cf12
WAA		 7955 for (i = 0; i < flavors->num_flavors; i++) {
7956 secinfo = &flavors->flavors[i];
7957
7958 switch (secinfo->flavor) {
7959 case RPC_AUTH_NULL:
7960 case RPC_AUTH_UNIX:
7961 case RPC_AUTH_GSS:
7962 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7963 &secinfo->flavor_info);
7964 break;
7965 default:
7966 flavor = RPC_AUTH_MAXFLAVOR;
7967 break;
7968 }
7969
4d4b69dd
WAA		 7970 if (!nfs_auth_info_match(&server->auth_info, flavor))
7971 flavor = RPC_AUTH_MAXFLAVOR;
7972
58a8cf12
WAA		 7973 if (flavor != RPC_AUTH_MAXFLAVOR) {
7974 err = nfs4_lookup_root_sec(server, fhandle,
7975 info, flavor);
7976 if (!err)
7977 break;
7978 }
7979 }
7980
7981 if (flavor == RPC_AUTH_MAXFLAVOR)
7982 err = -EPERM;
fca78d6d
BS		 7983
7984out_freepage:
7985 put_page(page);
7986 if (err == -EACCES)
7987 return -EPERM;
7988out:
7989 return err;
7990}
1cab0652 7991
ab7cb0df
TM		 7992static int _nfs41_test_stateid(struct nfs_server *server,
7993 nfs4_stateid *stateid,
7994 struct rpc_cred *cred)
7d974794
BS		 7995{
7996 int status;
7997 struct nfs41_test_stateid_args args = {
1cab0652 7998 .stateid = stateid,
7d974794
BS		 7999 };
8000 struct nfs41_test_stateid_res res;
8001 struct rpc_message msg = {
8002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8003 .rpc_argp = &args,
8004 .rpc_resp = &res,
ab7cb0df 8005 .rpc_cred = cred,
7d974794 8006 };
3787d506
WAA		 8007 struct rpc_clnt *rpc_client = server->client;
8008
8009 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8010 &rpc_client, &msg);
1cab0652 8011
38527b15 8012 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8013 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8014 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8015 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8016 &args.seq_args, &res.seq_res);
38527b15
CL		 8017 if (status != NFS_OK) {
8018 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8019 return status;
38527b15
CL		 8020 }
8021 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8022 return -res.status;
7d974794
BS		 8023}
8024
38527b15
CL		 8025/**
8026 * nfs41_test_stateid - perform a TEST_STATEID operation
8027 *
8028 * @server: server / transport on which to perform the operation
8029 * @stateid: state ID to test
ab7cb0df 8030 * @cred: credential
38527b15
CL		 8031 *
8032 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8033 * Otherwise a negative NFS4ERR value is returned if the operation
8034 * failed or the state ID is not currently valid.
8035 */
ab7cb0df
TM		 8036static int nfs41_test_stateid(struct nfs_server *server,
8037 nfs4_stateid *stateid,
8038 struct rpc_cred *cred)
7d974794
BS		 8039{
8040 struct nfs4_exception exception = { };
8041 int err;
8042 do {
ab7cb0df 8043 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8044 if (err != -NFS4ERR_DELAY)
8045 break;
8046 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8047 } while (exception.retry);
8048 return err;
8049}
9aeda35f 8050
7c1d5fae
TM		 8051struct nfs_free_stateid_data {
8052 struct nfs_server *server;
8053 struct nfs41_free_stateid_args args;
9aeda35f 8054 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8055};
8056
8057static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8058{
8059 struct nfs_free_stateid_data *data = calldata;
8060 nfs41_setup_sequence(nfs4_get_session(data->server),
8061 &data->args.seq_args,
8062 &data->res.seq_res,
8063 task);
8064}
8065
8066static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8067{
8068 struct nfs_free_stateid_data *data = calldata;
8069
8070 nfs41_sequence_done(task, &data->res.seq_res);
8071
8072 switch (task->tk_status) {
8073 case -NFS4ERR_DELAY:
8074 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8075 rpc_restart_call_prepare(task);
8076 }
8077}
8078
8079static void nfs41_free_stateid_release(void *calldata)
8080{
8081 kfree(calldata);
8082}
8083
17f26b12 8084static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8085 .rpc_call_prepare = nfs41_free_stateid_prepare,
8086 .rpc_call_done = nfs41_free_stateid_done,
8087 .rpc_release = nfs41_free_stateid_release,
8088};
8089
8090static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8091 nfs4_stateid *stateid,
ab7cb0df 8092 struct rpc_cred *cred,
7c1d5fae
TM		 8093 bool privileged)
8094{
9aeda35f
BS		 8095 struct rpc_message msg = {
8096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8097 .rpc_cred = cred,
9aeda35f 8098 };
7c1d5fae
TM		 8099 struct rpc_task_setup task_setup = {
8100 .rpc_client = server->client,
8101 .rpc_message = &msg,
8102 .callback_ops = &nfs41_free_stateid_ops,
8103 .flags = RPC_TASK_ASYNC,
8104 };
8105 struct nfs_free_stateid_data *data;
9aeda35f 8106
3787d506
WAA		 8107 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8108 &task_setup.rpc_client, &msg);
8109
38527b15 8110 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8111 data = kmalloc(sizeof(*data), GFP_NOFS);
8112 if (!data)
8113 return ERR_PTR(-ENOMEM);
8114 data->server = server;
8115 nfs4_stateid_copy(&data->args.stateid, stateid);
8116
8117 task_setup.callback_data = data;
8118
8119 msg.rpc_argp = &data->args;
8120 msg.rpc_resp = &data->res;
a9c92d6b 8121 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8122 if (privileged)
8123 nfs4_set_sequence_privileged(&data->args.seq_args);
8124
8125 return rpc_run_task(&task_setup);
9aeda35f
BS		 8126}
8127
38527b15
CL		 8128/**
8129 * nfs41_free_stateid - perform a FREE_STATEID operation
8130 *
8131 * @server: server / transport on which to perform the operation
8132 * @stateid: state ID to release
ab7cb0df 8133 * @cred: credential
38527b15
CL		 8134 *
8135 * Returns NFS_OK if the server freed "stateid". Otherwise a
8136 * negative NFS4ERR value is returned.
8137 */
ab7cb0df
TM		 8138static int nfs41_free_stateid(struct nfs_server *server,
8139 nfs4_stateid *stateid,
8140 struct rpc_cred *cred)
9aeda35f 8141{
7c1d5fae
TM		 8142 struct rpc_task *task;
8143 int ret;
8144
ab7cb0df 8145 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8146 if (IS_ERR(task))
8147 return PTR_ERR(task);
8148 ret = rpc_wait_for_completion_task(task);
8149 if (!ret)
8150 ret = task->tk_status;
8151 rpc_put_task(task);
8152 return ret;
9aeda35f 8153}
36281caa 8154
c8b2d0bf
TM		 8155static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8156{
8157 struct rpc_task *task;
ab7cb0df 8158 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8159
ab7cb0df 8160 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8161 nfs4_free_lock_state(server, lsp);
8162 if (IS_ERR(task))
8163 return PTR_ERR(task);
8164 rpc_put_task(task);
8165 return 0;
8166}
8167
36281caa
TM		 8168static bool nfs41_match_stateid(const nfs4_stateid *s1,
8169 const nfs4_stateid *s2)
8170{
2d2f24ad 8171 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8172 return false;
8173
2d2f24ad 8174 if (s1->seqid == s2->seqid)
36281caa 8175 return true;
2d2f24ad 8176 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8177 return true;
8178
8179 return false;
8180}
8181
557134a3
AA		 8182#endif /* CONFIG_NFS_V4_1 */
8183
36281caa
TM		 8184static bool nfs4_match_stateid(const nfs4_stateid *s1,
8185 const nfs4_stateid *s2)
8186{
f597c537 8187 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8188}
8189
8190
17280175 8191static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8192 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8193 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8194 .recover_open = nfs4_open_reclaim,
8195 .recover_lock = nfs4_lock_reclaim,
591d71cb 8196 .establish_clid = nfs4_init_clientid,
05f4c350 8197 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8198};
8199
591d71cb 8200#if defined(CONFIG_NFS_V4_1)
17280175 8201static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8202 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8203 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8204 .recover_open = nfs4_open_reclaim,
8205 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8206 .establish_clid = nfs41_init_clientid,
fce5c838 8207 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8208 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8209};
8210#endif /* CONFIG_NFS_V4_1 */
8211
17280175 8212static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8213 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8214 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8215 .recover_open = nfs4_open_expired,
8216 .recover_lock = nfs4_lock_expired,
8217 .establish_clid = nfs4_init_clientid,
8218};
8219
8220#if defined(CONFIG_NFS_V4_1)
17280175 8221static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8222 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8223 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8224 .recover_open = nfs41_open_expired,
8225 .recover_lock = nfs41_lock_expired,
4d643d1d 8226 .establish_clid = nfs41_init_clientid,
1da177e4 8227};
591d71cb 8228#endif /* CONFIG_NFS_V4_1 */
1da177e4 8229
17280175 8230static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8231 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8232 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8233 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8234};
8235
8236#if defined(CONFIG_NFS_V4_1)
17280175 8237static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8238 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8239 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8240 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8241};
8242#endif
8243
ec011fe8 8244static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8245 .get_locations = _nfs40_proc_get_locations,
44c99933 8246 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8247};
8248
8249#if defined(CONFIG_NFS_V4_1)
8250static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8251 .get_locations = _nfs41_proc_get_locations,
44c99933 8252 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8253};
8254#endif /* CONFIG_NFS_V4_1 */
8255
97dc1359
TM		 8256static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8257 .minor_version = 0,
39c6daae
TM		 8258 .init_caps = NFS_CAP_READDIRPLUS
8259 | NFS_CAP_ATOMIC_OPEN
8260 | NFS_CAP_CHANGE_ATTR
8261 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8262 .init_client = nfs40_init_client,
8263 .shutdown_client = nfs40_shutdown_client,
36281caa 8264 .match_stateid = nfs4_match_stateid,
fca78d6d 8265 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8266 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8267 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8268 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8269 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8270 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8271 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8272};
8273
8274#if defined(CONFIG_NFS_V4_1)
8275static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8276 .minor_version = 1,
39c6daae
TM		 8277 .init_caps = NFS_CAP_READDIRPLUS
8278 | NFS_CAP_ATOMIC_OPEN
8279 | NFS_CAP_CHANGE_ATTR
3b66486c 8280 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8281 | NFS_CAP_STATEID_NFSV41
8282 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8283 .init_client = nfs41_init_client,
8284 .shutdown_client = nfs41_shutdown_client,
36281caa 8285 .match_stateid = nfs41_match_stateid,
fca78d6d 8286 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8287 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8288 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8289 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8290 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8291 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8292 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8293};
8294#endif
8295
42c2c424
SD		 8296#if defined(CONFIG_NFS_V4_2)
8297static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8298 .minor_version = 2,
7017310a
BS		 8299 .init_caps = NFS_CAP_READDIRPLUS
8300 | NFS_CAP_ATOMIC_OPEN
8301 | NFS_CAP_CHANGE_ATTR
8302 | NFS_CAP_POSIX_LOCK
8303 | NFS_CAP_STATEID_NFSV41
8304 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8305 .init_client = nfs41_init_client,
8306 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8307 .match_stateid = nfs41_match_stateid,
8308 .find_root_sec = nfs41_find_root_sec,
7017310a 8309 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8310 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8311 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8312 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8313 .state_renewal_ops = &nfs41_state_renewal_ops,
8314};
8315#endif
8316
97dc1359
TM		 8317const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8318 [0] = &nfs_v4_0_minor_ops,
8319#if defined(CONFIG_NFS_V4_1)
8320 [1] = &nfs_v4_1_minor_ops,
8321#endif
42c2c424
SD		 8322#if defined(CONFIG_NFS_V4_2)
8323 [2] = &nfs_v4_2_minor_ops,
8324#endif
97dc1359
TM		 8325};
8326
17f26b12 8327static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8328 .create = nfs_create,
8329 .lookup = nfs_lookup,
8330 .atomic_open = nfs_atomic_open,
8331 .link = nfs_link,
8332 .unlink = nfs_unlink,
8333 .symlink = nfs_symlink,
8334 .mkdir = nfs_mkdir,
8335 .rmdir = nfs_rmdir,
8336 .mknod = nfs_mknod,
8337 .rename = nfs_rename,
8338 .permission = nfs_permission,
8339 .getattr = nfs_getattr,
8340 .setattr = nfs_setattr,
8341 .getxattr = generic_getxattr,
8342 .setxattr = generic_setxattr,
8343 .listxattr = generic_listxattr,
8344 .removexattr = generic_removexattr,
8345};
8346
92e1d5be 8347static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8348 .permission = nfs_permission,
8349 .getattr = nfs_getattr,
8350 .setattr = nfs_setattr,
64c2ce8b
AK		 8351 .getxattr = generic_getxattr,
8352 .setxattr = generic_setxattr,
8353 .listxattr = generic_listxattr,
8354 .removexattr = generic_removexattr,
6b3b5496
BF		 8355};
8356
509de811 8357const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8358 .version = 4, /* protocol version */
8359 .dentry_ops = &nfs4_dentry_operations,
8360 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8361 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8362 .file_ops = &nfs4_file_operations,
1da177e4 8363 .getroot = nfs4_proc_get_root,
281cad46 8364 .submount = nfs4_submount,
ff9099f2 8365 .try_mount = nfs4_try_mount,
1da177e4
LT		 8366 .getattr = nfs4_proc_getattr,
8367 .setattr = nfs4_proc_setattr,
8368 .lookup = nfs4_proc_lookup,
8369 .access = nfs4_proc_access,
8370 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8371 .create = nfs4_proc_create,
8372 .remove = nfs4_proc_remove,
8373 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8374 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8375 .unlink_done = nfs4_proc_unlink_done,
8376 .rename = nfs4_proc_rename,
d3d4152a 8377 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8378 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8379 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8380 .link = nfs4_proc_link,
8381 .symlink = nfs4_proc_symlink,
8382 .mkdir = nfs4_proc_mkdir,
8383 .rmdir = nfs4_proc_remove,
8384 .readdir = nfs4_proc_readdir,
8385 .mknod = nfs4_proc_mknod,
8386 .statfs = nfs4_proc_statfs,
8387 .fsinfo = nfs4_proc_fsinfo,
8388 .pathconf = nfs4_proc_pathconf,
e9326dca 8389 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8390 .decode_dirent = nfs4_decode_dirent,
8391 .read_setup = nfs4_proc_read_setup,
1abb5088 8392 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8393 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8394 .read_done = nfs4_read_done,
1da177e4 8395 .write_setup = nfs4_proc_write_setup,
57208fa7 8396 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8397 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8398 .write_done = nfs4_write_done,
1da177e4 8399 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8400 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8401 .commit_done = nfs4_commit_done,
1da177e4 8402 .lock = nfs4_proc_lock,
e50a1c2e 8403 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8404 .close_context = nfs4_close_context,
2b484297 8405 .open_context = nfs4_atomic_open,
011e2a7f 8406 .have_delegation = nfs4_have_delegation,
57ec14c5 8407 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8408 .alloc_client = nfs4_alloc_client,
45a52a02 8409 .init_client = nfs4_init_client,
cdb7eced 8410 .free_client = nfs4_free_client,
1179acc6
BS		 8411 .create_server = nfs4_create_server,
8412 .clone_server = nfs_clone_server,
1da177e4
LT		 8413};
8414
64c2ce8b
AK		 8415static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8416 .prefix = XATTR_NAME_NFSV4_ACL,
8417 .list = nfs4_xattr_list_nfs4_acl,
8418 .get = nfs4_xattr_get_nfs4_acl,
8419 .set = nfs4_xattr_set_nfs4_acl,
8420};
8421
8422const struct xattr_handler *nfs4_xattr_handlers[] = {
8423 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8424#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8425 &nfs4_xattr_nfs4_label_handler,
8426#endif
64c2ce8b
AK		 8427 NULL
8428};
8429
1da177e4
LT		 8430/*
8431 * Local variables:
8432 * c-basic-offset: 8
8433 * End:
8434 */
Linux 6.x block layer and io_uring tree(s)