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SUNRPC: Remove EXPORT_SYMBOL_GPL() from GSS mech switch
[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
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
6e3cf241
TM		 110 case -NFS4ERR_FILE_OPEN:
111 return -EBUSY;
52567b03 112 default:
1da177e4 113 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 114 __func__, -err);
52567b03 115 break;
1da177e4 116 }
52567b03 117 return -EIO;
1da177e4
LT		 118}
119
120/*
121 * This is our standard bitmap for GETATTR requests.
122 */
1549210f 123const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138};
139
1549210f
TM		 140static const u32 nfs4_pnfs_open_bitmap[3] = {
141 FATTR4_WORD0_TYPE
142 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_SIZE
144 | FATTR4_WORD0_FSID
145 | FATTR4_WORD0_FILEID,
146 FATTR4_WORD1_MODE
147 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
156};
157
e23008ec
AA		 158static const u32 nfs4_open_noattr_bitmap[3] = {
159 FATTR4_WORD0_TYPE
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
162};
163
1da177e4
LT		 164const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
171};
172
4ce79717 173const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 174 FATTR4_WORD0_MAXLINK
175 | FATTR4_WORD0_MAXNAME,
176 0
177};
178
dae100c2 179const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
55b6e774 183 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 186};
187
830b8e33
MN		 188const u32 nfs4_fs_locations_bitmap[2] = {
189 FATTR4_WORD0_TYPE
190 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_SIZE
192 | FATTR4_WORD0_FSID
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
195 FATTR4_WORD1_MODE
196 | FATTR4_WORD1_NUMLINKS
197 | FATTR4_WORD1_OWNER
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
205};
206
bc4785cd 207static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 208 struct nfs4_readdir_arg *readdir)
209{
0dbb4c67 210 __be32 *start, *p;
1da177e4 211
1da177e4 212 if (cookie > 2) {
b7ef1956 213 readdir->cookie = cookie;
1da177e4
LT		 214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 return;
216 }
217
218 readdir->cookie = 0;
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 if (cookie == 2)
221 return;
222
223 /*
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
228 * instead of 1 or 2.
229 */
2b86ce2d 230 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 231
232 if (cookie == 0) {
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
238 p++;
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
4e769b93 242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 243 }
244
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
250 p++;
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
4e769b93 254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 255
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
2b86ce2d 258 kunmap_atomic(start);
1da177e4
LT		 259}
260
65de872e
TM		 261static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
262{
263 int res = 0;
264
265 might_sleep();
266
267 if (*timeout <= 0)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 271 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 272 if (fatal_signal_pending(current))
273 res = -ERESTARTSYS;
274 *timeout <<= 1;
275 return res;
276}
277
278/* This is the error handling routine for processes that are allowed
279 * to sleep.
280 */
b064eca2 281static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 282{
283 struct nfs_client *clp = server->nfs_client;
9e33bed5 284 struct nfs4_state *state = exception->state;
3114ea7a 285 struct inode *inode = exception->inode;
65de872e
TM		 286 int ret = errorcode;
287
288 exception->retry = 0;
289 switch(errorcode) {
290 case 0:
291 return 0;
3114ea7a 292 case -NFS4ERR_OPENMODE:
011e2a7f 293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 294 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 295 exception->retry = 1;
296 return 0;
297 }
298 if (state == NULL)
299 break;
5d422301
TM		 300 ret = nfs4_schedule_stateid_recovery(server, state);
301 if (ret < 0)
302 break;
3114ea7a 303 goto wait_on_recovery;
a1d0b5ee 304 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 307 if (state == NULL)
308 break;
14977489 309 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 310 ret = nfs4_schedule_stateid_recovery(server, state);
311 if (ret < 0)
312 break;
0400a6b0 313 goto wait_on_recovery;
0ced63d1 314 case -NFS4ERR_EXPIRED:
5d422301
TM		 315 if (state != NULL) {
316 ret = nfs4_schedule_stateid_recovery(server, state);
317 if (ret < 0)
318 break;
319 }
65de872e 320 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 321 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 322 nfs4_schedule_lease_recovery(clp);
323 goto wait_on_recovery;
03391693 324#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 325 case -NFS4ERR_BADSESSION:
326 case -NFS4ERR_BADSLOT:
327 case -NFS4ERR_BAD_HIGH_SLOT:
328 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
329 case -NFS4ERR_DEADSESSION:
330 case -NFS4ERR_SEQ_FALSE_RETRY:
331 case -NFS4ERR_SEQ_MISORDERED:
332 dprintk("%s ERROR: %d Reset session\n", __func__,
333 errorcode);
9f594791 334 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 335 goto wait_on_recovery;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 ret = nfs4_delay(server->client, &exception->timeout);
348 if (ret != 0)
349 break;
a8a4ae3a 350 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 351 case -NFS4ERR_OLD_STATEID:
352 exception->retry = 1;
b064eca2
TM		 353 break;
354 case -NFS4ERR_BADOWNER:
355 /* The following works around a Linux server bug! */
356 case -NFS4ERR_BADNAME:
357 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
358 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
359 exception->retry = 1;
360 printk(KERN_WARNING "NFS: v4 server %s "
361 "does not accept raw "
362 "uid/gids. "
363 "Reenabling the idmapper.\n",
364 server->nfs_client->cl_hostname);
365 }
65de872e
TM		 366 }
367 /* We failed to handle the error */
368 return nfs4_map_errors(ret);
0400a6b0 369wait_on_recovery:
a2c0b9e2
TM		 370 ret = nfs4_wait_clnt_recover(clp);
371 if (ret == 0)
372 exception->retry = 1;
373 return ret;
65de872e
TM		 374}
375
376
452e9352 377static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 378{
1da177e4
LT		 379 spin_lock(&clp->cl_lock);
380 if (time_before(clp->cl_last_renewal,timestamp))
381 clp->cl_last_renewal = timestamp;
382 spin_unlock(&clp->cl_lock);
383}
384
452e9352
TM		 385static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
386{
387 do_renew_lease(server->nfs_client, timestamp);
388}
389
cccef3b9
AA		 390#if defined(CONFIG_NFS_V4_1)
391
d185a334 392static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 393{
e3725ec0 394 struct nfs4_session *session;
13615871 395 struct nfs4_slot_table *tbl;
c10e4498 396 bool send_new_highest_used_slotid = false;
13615871 397
dfb4f309 398 if (!res->sr_slot) {
13615871
AA		 399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
691daf3b 401 dprintk("%s: No slot\n", __func__);
35dc1d74 402 return;
13615871 403 }
e3725ec0
TM		 404 tbl = res->sr_slot->table;
405 session = tbl->session;
ea028ac9 406
35dc1d74 407 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 408 /* Be nice to the server: try to ensure that the last transmitted
409 * value for highest_user_slotid <= target_highest_slotid
410 */
411 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
412 send_new_highest_used_slotid = true;
413
b75ad4cd
TM		 414 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
415 send_new_highest_used_slotid = false;
416 goto out_unlock;
417 }
f4af6e2a 418 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 419
420 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
421 send_new_highest_used_slotid = false;
b75ad4cd 422out_unlock:
35dc1d74 423 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 424 res->sr_slot = NULL;
c10e4498
TM		 425 if (send_new_highest_used_slotid)
426 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 427}
428
14516c3a 429static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 430{
e3725ec0 431 struct nfs4_session *session;
933602e3 432 struct nfs4_slot *slot;
14516c3a 433 struct nfs_client *clp;
ac20d163 434 bool interrupted = false;
85563073 435 int ret = 1;
b0df806c 436
468f8613
BS		 437 /* don't increment the sequence number if the task wasn't sent */
438 if (!RPC_WAS_SENT(task))
b0df806c
AA		 439 goto out;
440
933602e3 441 slot = res->sr_slot;
e3725ec0 442 session = slot->table->session;
933602e3 443
ac20d163
TM		 444 if (slot->interrupted) {
445 slot->interrupted = 0;
446 interrupted = true;
447 }
448
691daf3b 449 /* Check the SEQUENCE operation status */
14516c3a
TM		 450 switch (res->sr_status) {
451 case 0:
b0df806c 452 /* Update the slot's sequence and clientid lease timer */
933602e3 453 ++slot->seq_nr;
e3725ec0 454 clp = session->clp;
8e63b6a8 455 do_renew_lease(clp, res->sr_timestamp);
0629e370 456 /* Check sequence flags */
b4410c2f
TM		 457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
464ee9f9 459 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 460 break;
ac20d163
TM		 461 case 1:
462 /*
463 * sr_status remains 1 if an RPC level error occurred.
464 * The server may or may not have processed the sequence
465 * operation..
466 * Mark the slot as having hosted an interrupted RPC call.
467 */
468 slot->interrupted = 1;
469 goto out;
14516c3a
TM		 470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
df2fabff 475 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 476 __func__,
df2fabff 477 slot->slot_nr,
933602e3 478 slot->seq_nr);
14516c3a 479 goto out_retry;
85563073
TM		 480 case -NFS4ERR_BADSLOT:
481 /*
482 * The slot id we used was probably retired. Try again
483 * using a different slot id.
484 */
e8794440
TM		 485 goto retry_nowait;
486 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 487 /*
488 * Was the last operation on this sequence interrupted?
489 * If so, retry after bumping the sequence number.
490 */
491 if (interrupted) {
492 ++slot->seq_nr;
493 goto retry_nowait;
494 }
e8794440
TM		 495 /*
496 * Could this slot have been previously retired?
497 * If so, then the server may be expecting seq_nr = 1!
498 */
8e63b6a8
TM		 499 if (slot->seq_nr != 1) {
500 slot->seq_nr = 1;
501 goto retry_nowait;
502 }
503 break;
e8794440
TM		 504 case -NFS4ERR_SEQ_FALSE_RETRY:
505 ++slot->seq_nr;
506 goto retry_nowait;
14516c3a
TM		 507 default:
508 /* Just update the slot sequence no. */
933602e3 509 ++slot->seq_nr;
b0df806c
AA		 510 }
511out:
512 /* The session may be reset by one of the error handlers. */
513 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 514 nfs41_sequence_free_slot(res);
85563073 515 return ret;
e8794440
TM		 516retry_nowait:
517 if (rpc_restart_call_prepare(task)) {
518 task->tk_status = 0;
519 ret = 0;
520 }
521 goto out;
14516c3a 522out_retry:
d05dd4e9 523 if (!rpc_restart_call(task))
14516c3a
TM		 524 goto out;
525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
526 return 0;
b0df806c
AA		 527}
528
14516c3a
TM		 529static int nfs4_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
df896455 531{
e3725ec0 532 if (res->sr_slot == NULL)
14516c3a
TM		 533 return 1;
534 return nfs41_sequence_done(task, res);
df896455
TM		 535}
536
9d12b216
TM		 537static void nfs41_init_sequence(struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res, int cache_reply)
539{
2b2fa717 540 args->sa_slot = NULL;
9d12b216 541 args->sa_cache_this = 0;
8fe72bac 542 args->sa_privileged = 0;
9d12b216
TM		 543 if (cache_reply)
544 args->sa_cache_this = 1;
9d12b216
TM		 545 res->sr_slot = NULL;
546}
547
8fe72bac
TM		 548static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
549{
550 args->sa_privileged = 1;
551}
552
dc70d7b3 553int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 554 struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res,
ce5039c1
AA		 556 struct rpc_task *task)
557{
fbcd4abc
AA		 558 struct nfs4_slot *slot;
559 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 560
561 dprintk("--> %s\n", __func__);
ce5039c1 562 /* slot already allocated? */
dfb4f309 563 if (res->sr_slot != NULL)
d9afbd1b 564 goto out_success;
ce5039c1 565
fbcd4abc
AA		 566 tbl = &session->fc_slot_table;
567
69d206b5
TM		 568 task->tk_timeout = 0;
569
fbcd4abc 570 spin_lock(&tbl->slot_tbl_lock);
a2118c33 571 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 572 !args->sa_privileged) {
0b1c8fc4 573 /* The state manager will wait until the slot table is empty */
0b1c8fc4 574 dprintk("%s session is draining\n", __func__);
7b939a3f 575 goto out_sleep;
689cf5c1
AB		 576 }
577
2dc03b7f 578 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 579 if (IS_ERR(slot)) {
580 /* If out of memory, try again in 1/4 second */
581 if (slot == ERR_PTR(-ENOMEM))
582 task->tk_timeout = HZ >> 2;
fbcd4abc 583 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 584 goto out_sleep;
fbcd4abc
AA		 585 }
586 spin_unlock(&tbl->slot_tbl_lock);
587
2b2fa717 588 args->sa_slot = slot;
fbcd4abc 589
2dc03b7f
TM		 590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
591 slot->slot_nr, slot->seq_nr);
fbcd4abc 592
dfb4f309 593 res->sr_slot = slot;
8e63b6a8 594 res->sr_timestamp = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
d9afbd1b
TM		 601out_success:
602 rpc_call_start(task);
ce5039c1 603 return 0;
7b939a3f 604out_sleep:
8fe72bac
TM		 605 /* Privileged tasks are queued with top priority */
606 if (args->sa_privileged)
1e1093c7
TM		 607 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
608 NULL, RPC_PRIORITY_PRIVILEGED);
609 else
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 611 spin_unlock(&tbl->slot_tbl_lock);
612 return -EAGAIN;
ce5039c1 613}
dc70d7b3 614EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 615
035168ab 616int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
035168ab 621 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 622 int ret = 0;
623
d9afbd1b
TM		 624 if (session == NULL) {
625 rpc_call_start(task);
035168ab 626 goto out;
d9afbd1b 627 }
035168ab 628
df2fabff 629 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 630 __func__, session->clp, session, res->sr_slot ?
df2fabff 631 res->sr_slot->slot_nr : -1);
ce5039c1 632
9d12b216 633 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 634out:
635 dprintk("<-- %s status=%d\n", __func__, ret);
636 return ret;
637}
638
639struct nfs41_call_sync_data {
035168ab 640 const struct nfs_server *seq_server;
ce5039c1
AA		 641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 643};
644
645static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
646{
647 struct nfs41_call_sync_data *data = calldata;
6ba7db34 648 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 649
035168ab
TM		 650 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
651
d9afbd1b 652 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 653}
654
69ab40c4
AA		 655static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
14516c3a 659 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 660}
661
17280175 662static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 663 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 664 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 665};
666
7c513058
BS		 667static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
ce5039c1
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
8fe72bac 671 struct nfs4_sequence_res *res)
ce5039c1
AA		 672{
673 int ret;
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
035168ab 676 .seq_server = server,
ce5039c1
AA		 677 .seq_args = args,
678 .seq_res = res,
ce5039c1
AA		 679 };
680 struct rpc_task_setup task_setup = {
7c513058 681 .rpc_client = clnt,
ce5039c1
AA		 682 .rpc_message = msg,
683 .callback_ops = &nfs41_call_sync_ops,
684 .callback_data = &data
685 };
686
ce5039c1
AA		 687 task = rpc_run_task(&task_setup);
688 if (IS_ERR(task))
689 ret = PTR_ERR(task);
690 else {
691 ret = task->tk_status;
692 rpc_put_task(task);
693 }
694 return ret;
695}
696
df896455 697#else
8fe72bac 698static
9d12b216
TM		 699void nfs41_init_sequence(struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res, int cache_reply)
701{
702}
703
8fe72bac
TM		 704static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
705{
706}
707
708
14516c3a
TM		 709static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
df896455 711{
14516c3a 712 return 1;
df896455 713}
cccef3b9
AA		 714#endif /* CONFIG_NFS_V4_1 */
715
fd0c0953 716static
7c513058
BS		 717int _nfs4_call_sync(struct rpc_clnt *clnt,
718 struct nfs_server *server,
cccef3b9
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
fd0c0953 721 struct nfs4_sequence_res *res)
cccef3b9 722{
7c513058 723 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 724}
725
fd0c0953 726static
7c513058
BS		 727int nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
e73b83f2
BS		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
fd0c0953 734 nfs41_init_sequence(args, res, cache_reply);
7c513058 735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 736 args, res);
e73b83f2 737}
cccef3b9 738
38478b24 739static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 740{
38478b24 741 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 742
38478b24 743 spin_lock(&dir->i_lock);
359d7d1c 744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 745 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 746 nfs_force_lookup_revalidate(dir);
a9a4a87a 747 dir->i_version = cinfo->after;
de242c0b 748 nfs_fscache_invalidate(dir);
38478b24 749 spin_unlock(&dir->i_lock);
1da177e4
LT		 750}
751
e56e0b78 752struct nfs4_opendata {
c6d00e63 753 struct kref kref;
e56e0b78
TM		 754 struct nfs_openargs o_arg;
755 struct nfs_openres o_res;
cdd4e68b
TM		 756 struct nfs_open_confirmargs c_arg;
757 struct nfs_open_confirmres c_res;
6926afd1
TM		 758 struct nfs4_string owner_name;
759 struct nfs4_string group_name;
e56e0b78 760 struct nfs_fattr f_attr;
e56e0b78 761 struct dentry *dir;
82a2c1b7 762 struct dentry *dentry;
e56e0b78 763 struct nfs4_state_owner *owner;
aac00a8d 764 struct nfs4_state *state;
e56e0b78 765 struct iattr attrs;
26e976a8 766 unsigned long timestamp;
3e309914 767 unsigned int rpc_done : 1;
24ac23ab
TM		 768 int rpc_status;
769 int cancelled;
e56e0b78
TM		 770};
771
49f9a0fa
TM		 772static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
773 int err, struct nfs4_exception *exception)
774{
775 if (err != -EINVAL)
776 return false;
777 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
778 return false;
779 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
780 exception->retry = 1;
781 return true;
782}
783
784static enum open_claim_type4
785nfs4_map_atomic_open_claim(struct nfs_server *server,
786 enum open_claim_type4 claim)
787{
788 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
789 return claim;
790 switch (claim) {
791 default:
792 return claim;
793 case NFS4_OPEN_CLAIM_FH:
794 return NFS4_OPEN_CLAIM_NULL;
795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
796 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
797 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
798 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
799 }
800}
2ced46c2
TM		 801
802static void nfs4_init_opendata_res(struct nfs4_opendata *p)
803{
804 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 805 p->o_res.seqid = p->o_arg.seqid;
806 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 807 p->o_res.server = p->o_arg.server;
5f657530 808 p->o_res.access_request = p->o_arg.access;
2ced46c2 809 nfs_fattr_init(&p->f_attr);
6926afd1 810 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 811}
812
82a2c1b7 813static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 814 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 815 const struct iattr *attrs,
4a1c0893 816 enum open_claim_type4 claim,
8535b2be 817 gfp_t gfp_mask)
e56e0b78 818{
82a2c1b7 819 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 820 struct inode *dir = parent->d_inode;
821 struct nfs_server *server = NFS_SERVER(dir);
822 struct nfs4_opendata *p;
823
8535b2be 824 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 825 if (p == NULL)
826 goto err;
8535b2be 827 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 828 if (p->o_arg.seqid == NULL)
829 goto err_free;
82a2c1b7
AV		 830 nfs_sb_active(dentry->d_sb);
831 p->dentry = dget(dentry);
e56e0b78
TM		 832 p->dir = parent;
833 p->owner = sp;
834 atomic_inc(&sp->so_count);
dc0b027d
TM		 835 p->o_arg.open_flags = flags;
836 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 837 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
838 * will return permission denied for all bits until close */
839 if (!(flags & O_EXCL)) {
840 /* ask server to check for all possible rights as results
841 * are cached */
842 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
843 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 844 }
7539bbab 845 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 846 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
847 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 848 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 849 p->o_arg.server = server;
850 p->o_arg.bitmask = server->attr_bitmask;
1549210f 851 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 852 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
853 switch (p->o_arg.claim) {
4a1c0893
TM		 854 case NFS4_OPEN_CLAIM_NULL:
855 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
856 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
857 p->o_arg.fh = NFS_FH(dir);
858 break;
859 case NFS4_OPEN_CLAIM_PREVIOUS:
860 case NFS4_OPEN_CLAIM_FH:
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
863 p->o_arg.fh = NFS_FH(dentry->d_inode);
864 }
536e43d1 865 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 866 __be32 verf[2];
d77d76ff 867
e56e0b78
TM		 868 p->o_arg.u.attrs = &p->attrs;
869 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 870
871 verf[0] = jiffies;
872 verf[1] = current->pid;
873 memcpy(p->o_arg.u.verifier.data, verf,
874 sizeof(p->o_arg.u.verifier.data));
e56e0b78 875 }
cdd4e68b
TM		 876 p->c_arg.fh = &p->o_res.fh;
877 p->c_arg.stateid = &p->o_res.stateid;
878 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 879 nfs4_init_opendata_res(p);
c6d00e63 880 kref_init(&p->kref);
e56e0b78
TM		 881 return p;
882err_free:
883 kfree(p);
884err:
885 dput(parent);
886 return NULL;
887}
888
c6d00e63 889static void nfs4_opendata_free(struct kref *kref)
e56e0b78 890{
c6d00e63
TM		 891 struct nfs4_opendata *p = container_of(kref,
892 struct nfs4_opendata, kref);
82a2c1b7 893 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 894
895 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 896 if (p->state != NULL)
897 nfs4_put_open_state(p->state);
c6d00e63
TM		 898 nfs4_put_state_owner(p->owner);
899 dput(p->dir);
82a2c1b7
AV		 900 dput(p->dentry);
901 nfs_sb_deactive(sb);
6926afd1 902 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 903 kfree(p);
904}
905
906static void nfs4_opendata_put(struct nfs4_opendata *p)
907{
908 if (p != NULL)
909 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 910}
911
06f814a3
TM		 912static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
913{
06f814a3
TM		 914 int ret;
915
06f814a3 916 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 917 return ret;
918}
919
dc0b027d 920static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 921{
922 int ret = 0;
dc0b027d 923
536e43d1 924 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 925 goto out;
926 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 927 case FMODE_READ:
88069f77
TM		 928 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
929 && state->n_rdonly != 0;
6ee41268
TM		 930 break;
931 case FMODE_WRITE:
88069f77
TM		 932 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
933 && state->n_wronly != 0;
6ee41268
TM		 934 break;
935 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
937 && state->n_rdwr != 0;
6ee41268 938 }
dc0b027d 939out:
6ee41268
TM		 940 return ret;
941}
942
dc0b027d 943static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 944{
652f89f6
TM		 945 if (delegation == NULL)
946 return 0;
dc0b027d 947 if ((delegation->type & fmode) != fmode)
aac00a8d 948 return 0;
15c831bf 949 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 950 return 0;
d25be546
TM		 951 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
952 return 0;
b7391f44 953 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 954 return 1;
955}
956
dc0b027d 957static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 958{
dc0b027d 959 switch (fmode) {
e7616923
TM		 960 case FMODE_WRITE:
961 state->n_wronly++;
962 break;
963 case FMODE_READ:
964 state->n_rdonly++;
965 break;
966 case FMODE_READ|FMODE_WRITE:
967 state->n_rdwr++;
968 }
dc0b027d 969 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 970}
971
dc0b027d 972static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 973{
974 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 975 nfs4_stateid_copy(&state->stateid, stateid);
976 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 977 switch (fmode) {
003707c7
TM		 978 case FMODE_READ:
979 set_bit(NFS_O_RDONLY_STATE, &state->flags);
980 break;
981 case FMODE_WRITE:
982 set_bit(NFS_O_WRONLY_STATE, &state->flags);
983 break;
984 case FMODE_READ|FMODE_WRITE:
985 set_bit(NFS_O_RDWR_STATE, &state->flags);
986 }
e7616923
TM		 987}
988
dc0b027d 989static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 990{
8bda4e4c 991 write_seqlock(&state->seqlock);
dc0b027d 992 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 993 write_sequnlock(&state->seqlock);
003707c7
TM		 994}
995
dc0b027d 996static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 997{
8bda4e4c
TM		 998 /*
999 * Protect the call to nfs4_state_set_mode_locked and
1000 * serialise the stateid update
1001 */
1002 write_seqlock(&state->seqlock);
003707c7 1003 if (deleg_stateid != NULL) {
f597c537 1004 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1005 set_bit(NFS_DELEGATED_STATE, &state->flags);
1006 }
1007 if (open_stateid != NULL)
dc0b027d 1008 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1009 write_sequnlock(&state->seqlock);
1010 spin_lock(&state->owner->so_lock);
dc0b027d 1011 update_open_stateflags(state, fmode);
ec073428 1012 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1013}
1014
dc0b027d 1015static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1016{
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *deleg_cur;
1019 int ret = 0;
1020
dc0b027d 1021 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1022
1023 rcu_read_lock();
1024 deleg_cur = rcu_dereference(nfsi->delegation);
1025 if (deleg_cur == NULL)
1026 goto no_delegation;
1027
1028 spin_lock(&deleg_cur->lock);
1029 if (nfsi->delegation != deleg_cur ||
d25be546 1030 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1031 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1032 goto no_delegation_unlock;
1033
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
f597c537 1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1037 goto no_delegation_unlock;
1038
b7391f44 1039 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1041 ret = 1;
1042no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1044no_delegation:
1045 rcu_read_unlock();
1046
1047 if (!ret && open_stateid != NULL) {
dc0b027d 1048 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1049 ret = 1;
1050 }
1051
1052 return ret;
1053}
1054
1055
dc0b027d 1056static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1057{
1058 struct nfs_delegation *delegation;
1059
1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1063 rcu_read_unlock();
1064 return;
1065 }
1066 rcu_read_unlock();
57ec14c5 1067 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1068}
1069
6ee41268 1070static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1071{
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
536e43d1 1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1076 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1077 nfs4_stateid stateid;
1078 int ret = -EAGAIN;
1079
aac00a8d 1080 for (;;) {
dc0b027d 1081 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1082 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
6ee41268 1085 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1086 goto out_return_state;
1087 }
1088 spin_unlock(&state->owner->so_lock);
1089 }
34310430
TM		 1090 rcu_read_lock();
1091 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1092 if (!can_open_delegated(delegation, fmode)) {
34310430 1093 rcu_read_unlock();
aac00a8d 1094 break;
34310430 1095 }
aac00a8d 1096 /* Save the delegation */
f597c537 1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1098 rcu_read_unlock();
af22f94a 1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1100 if (ret != 0)
1101 goto out;
1102 ret = -EAGAIN;
34310430
TM		 1103
1104 /* Try to update the stateid using the delegation */
dc0b027d 1105 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1106 goto out_return_state;
aac00a8d 1107 }
aac00a8d
TM		 1108out:
1109 return ERR_PTR(ret);
1110out_return_state:
1111 atomic_inc(&state->count);
1112 return state;
1113}
1114
e23008ec
AA		 1115static void
1116nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1117{
1118 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1119 struct nfs_delegation *delegation;
1120 int delegation_flags = 0;
1121
1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1131 clp->cl_hostname);
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140}
1141
1142/*
1143 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1144 * and update the nfs4_state.
1145 */
1146static struct nfs4_state *
1147_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1148{
1149 struct inode *inode = data->state->inode;
1150 struct nfs4_state *state = data->state;
1151 int ret;
1152
1153 if (!data->rpc_done) {
1154 ret = data->rpc_status;
1155 goto err;
1156 }
1157
1158 ret = -ESTALE;
1159 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1160 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1161 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1162 goto err;
1163
1164 ret = -ENOMEM;
1165 state = nfs4_get_open_state(inode, data->owner);
1166 if (state == NULL)
1167 goto err;
1168
1169 ret = nfs_refresh_inode(inode, &data->f_attr);
1170 if (ret)
1171 goto err;
1172
1173 if (data->o_res.delegation_type != 0)
1174 nfs4_opendata_check_deleg(data, state);
1175 update_open_stateid(state, &data->o_res.stateid, NULL,
1176 data->o_arg.fmode);
1177
1178 return state;
1179err:
1180 return ERR_PTR(ret);
1181
1182}
1183
1184static struct nfs4_state *
1185_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1186{
1187 struct inode *inode;
1188 struct nfs4_state *state = NULL;
1b370bc2 1189 int ret;
24ac23ab 1190
aac00a8d 1191 if (!data->rpc_done) {
6ee41268 1192 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1193 goto out;
1194 }
1195
1b370bc2 1196 ret = -EAGAIN;
24ac23ab 1197 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1198 goto err;
24ac23ab 1199 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1200 ret = PTR_ERR(inode);
03f28e3a 1201 if (IS_ERR(inode))
1b370bc2
TM		 1202 goto err;
1203 ret = -ENOMEM;
24ac23ab
TM		 1204 state = nfs4_get_open_state(inode, data->owner);
1205 if (state == NULL)
1b370bc2 1206 goto err_put_inode;
e23008ec
AA		 1207 if (data->o_res.delegation_type != 0)
1208 nfs4_opendata_check_deleg(data, state);
34310430 1209 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1210 data->o_arg.fmode);
24ac23ab 1211 iput(inode);
aac00a8d 1212out:
7aa262b5 1213 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1214 return state;
1b370bc2
TM		 1215err_put_inode:
1216 iput(inode);
1217err:
1218 return ERR_PTR(ret);
24ac23ab
TM		 1219}
1220
e23008ec
AA		 1221static struct nfs4_state *
1222nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1223{
1224 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1225 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1226 return _nfs4_opendata_to_nfs4_state(data);
1227}
1228
864472e9
TM		 1229static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1230{
1231 struct nfs_inode *nfsi = NFS_I(state->inode);
1232 struct nfs_open_context *ctx;
1233
1234 spin_lock(&state->inode->i_lock);
1235 list_for_each_entry(ctx, &nfsi->open_files, list) {
1236 if (ctx->state != state)
1237 continue;
1238 get_nfs_open_context(ctx);
1239 spin_unlock(&state->inode->i_lock);
1240 return ctx;
1241 }
1242 spin_unlock(&state->inode->i_lock);
1243 return ERR_PTR(-ENOENT);
1244}
1245
4a1c0893
TM		 1246static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1247 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1248{
1249 struct nfs4_opendata *opendata;
1250
4a1c0893
TM		 1251 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1252 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1253 if (opendata == NULL)
1254 return ERR_PTR(-ENOMEM);
1255 opendata->state = state;
1256 atomic_inc(&state->count);
1257 return opendata;
1258}
1259
dc0b027d 1260static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1261{
2ced46c2 1262 struct nfs4_state *newstate;
864472e9
TM		 1263 int ret;
1264
dc0b027d
TM		 1265 opendata->o_arg.open_flags = 0;
1266 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1267 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1268 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1269 nfs4_init_opendata_res(opendata);
b257957e 1270 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1271 if (ret != 0)
1272 return ret;
2ced46c2 1273 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1274 if (IS_ERR(newstate))
1275 return PTR_ERR(newstate);
643168c2 1276 nfs4_close_state(newstate, fmode);
2ced46c2 1277 *res = newstate;
864472e9
TM		 1278 return 0;
1279}
1280
1281static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1282{
864472e9 1283 struct nfs4_state *newstate;
864472e9
TM		 1284 int ret;
1285
1286 /* memory barrier prior to reading state->n_* */
2ced46c2 1287 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1288 smp_rmb();
1289 if (state->n_rdwr != 0) {
b0ed9dbc 1290 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1291 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1292 if (ret != 0)
1293 return ret;
2ced46c2
TM		 1294 if (newstate != state)
1295 return -ESTALE;
864472e9
TM		 1296 }
1297 if (state->n_wronly != 0) {
b0ed9dbc 1298 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1299 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1300 if (ret != 0)
1301 return ret;
2ced46c2
TM		 1302 if (newstate != state)
1303 return -ESTALE;
864472e9
TM		 1304 }
1305 if (state->n_rdonly != 0) {
b0ed9dbc 1306 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1308 if (ret != 0)
1309 return ret;
2ced46c2
TM		 1310 if (newstate != state)
1311 return -ESTALE;
864472e9 1312 }
1ac7e2fd
TM		 1313 /*
1314 * We may have performed cached opens for all three recoveries.
1315 * Check if we need to update the current stateid.
1316 */
1317 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1318 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1319 write_seqlock(&state->seqlock);
1ac7e2fd 1320 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1322 write_sequnlock(&state->seqlock);
1ac7e2fd 1323 }
864472e9
TM		 1324 return 0;
1325}
1326
1da177e4
LT		 1327/*
1328 * OPEN_RECLAIM:
1329 * reclaim state on the server after a reboot.
1da177e4 1330 */
539cd03a 1331static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1332{
1ac7e2fd 1333 struct nfs_delegation *delegation;
864472e9 1334 struct nfs4_opendata *opendata;
dc0b027d 1335 fmode_t delegation_type = 0;
1da177e4
LT		 1336 int status;
1337
4a1c0893
TM		 1338 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1339 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1340 if (IS_ERR(opendata))
1341 return PTR_ERR(opendata);
1ac7e2fd
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1344 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1345 delegation_type = delegation->type;
1ac7e2fd 1346 rcu_read_unlock();
864472e9
TM		 1347 opendata->o_arg.u.delegation_type = delegation_type;
1348 status = nfs4_open_recover(opendata, state);
c6d00e63 1349 nfs4_opendata_put(opendata);
1da177e4
LT		 1350 return status;
1351}
1352
539cd03a 1353static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1354{
1355 struct nfs_server *server = NFS_SERVER(state->inode);
1356 struct nfs4_exception exception = { };
1357 int err;
1358 do {
539cd03a 1359 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1360 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1361 continue;
168667c4 1362 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1363 break;
1364 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1365 } while (exception.retry);
1366 return err;
1367}
1368
864472e9
TM		 1369static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1370{
1371 struct nfs_open_context *ctx;
1372 int ret;
1373
1374 ctx = nfs4_state_find_open_context(state);
1375 if (IS_ERR(ctx))
91876b13 1376 return -EAGAIN;
539cd03a 1377 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1378 put_nfs_open_context(ctx);
1379 return ret;
1380}
1381
13437e12 1382static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1383{
e56e0b78 1384 struct nfs4_opendata *opendata;
864472e9 1385 int ret;
1da177e4 1386
4a1c0893 1387 opendata = nfs4_open_recoverdata_alloc(ctx, state,
ccb46e20 1388 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
6f220ed5
TM		 1389 if (IS_ERR(opendata))
1390 return PTR_ERR(opendata);
f597c537 1391 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1392 ret = nfs4_open_recover(opendata, state);
c6d00e63 1393 nfs4_opendata_put(opendata);
864472e9 1394 return ret;
1da177e4
LT		 1395}
1396
13437e12 1397int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1398{
1399 struct nfs4_exception exception = { };
539cd03a 1400 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1401 int err;
1402 do {
13437e12 1403 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1404 switch (err) {
1405 case 0:
965b5d67
TM		 1406 case -ENOENT:
1407 case -ESTALE:
1408 goto out;
bcfa49f6
RL		 1409 case -NFS4ERR_BADSESSION:
1410 case -NFS4ERR_BADSLOT:
1411 case -NFS4ERR_BAD_HIGH_SLOT:
1412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1413 case -NFS4ERR_DEADSESSION:
37380e42 1414 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1415 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1416 err = -EAGAIN;
bcfa49f6 1417 goto out;
1da177e4
LT		 1418 case -NFS4ERR_STALE_CLIENTID:
1419 case -NFS4ERR_STALE_STATEID:
37380e42 1420 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1421 case -NFS4ERR_EXPIRED:
1422 /* Don't recall a delegation if it was lost */
0400a6b0 1423 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1424 err = -EAGAIN;
965b5d67 1425 goto out;
a1d0b5ee 1426 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1427 case -NFS4ERR_ADMIN_REVOKED:
1428 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1429 nfs_inode_find_state_and_recover(state->inode,
1430 stateid);
0400a6b0 1431 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1432 case -ENOMEM:
1433 err = 0;
1434 goto out;
1da177e4 1435 }
37380e42 1436 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1437 err = nfs4_handle_exception(server, err, &exception);
1438 } while (exception.retry);
965b5d67 1439out:
1da177e4
LT		 1440 return err;
1441}
1442
cdd4e68b
TM		 1443static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1444{
1445 struct nfs4_opendata *data = calldata;
1446
1447 data->rpc_status = task->tk_status;
26e976a8 1448 if (data->rpc_status == 0) {
f597c537 1449 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1450 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1451 renew_lease(data->o_res.server, data->timestamp);
3e309914 1452 data->rpc_done = 1;
26e976a8 1453 }
cdd4e68b
TM		 1454}
1455
1456static void nfs4_open_confirm_release(void *calldata)
1457{
1458 struct nfs4_opendata *data = calldata;
1459 struct nfs4_state *state = NULL;
1460
1461 /* If this request hasn't been cancelled, do nothing */
1462 if (data->cancelled == 0)
1463 goto out_free;
1464 /* In case of error, no cleanup! */
3e309914 1465 if (!data->rpc_done)
cdd4e68b 1466 goto out_free;
cdd4e68b 1467 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1468 if (!IS_ERR(state))
643168c2 1469 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1470out_free:
c6d00e63 1471 nfs4_opendata_put(data);
cdd4e68b
TM		 1472}
1473
1474static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1475 .rpc_call_done = nfs4_open_confirm_done,
1476 .rpc_release = nfs4_open_confirm_release,
1477};
1478
1479/*
1480 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1481 */
1482static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1483{
1484 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1485 struct rpc_task *task;
5138fde0
TM		 1486 struct rpc_message msg = {
1487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1488 .rpc_argp = &data->c_arg,
1489 .rpc_resp = &data->c_res,
1490 .rpc_cred = data->owner->so_cred,
1491 };
c970aa85
TM		 1492 struct rpc_task_setup task_setup_data = {
1493 .rpc_client = server->client,
5138fde0 1494 .rpc_message = &msg,
c970aa85
TM		 1495 .callback_ops = &nfs4_open_confirm_ops,
1496 .callback_data = data,
101070ca 1497 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1498 .flags = RPC_TASK_ASYNC,
1499 };
1da177e4
LT		 1500 int status;
1501
c6d00e63 1502 kref_get(&data->kref);
3e309914
TM		 1503 data->rpc_done = 0;
1504 data->rpc_status = 0;
5138fde0 1505 data->timestamp = jiffies;
c970aa85 1506 task = rpc_run_task(&task_setup_data);
7a1218a2 1507 if (IS_ERR(task))
cdd4e68b 1508 return PTR_ERR(task);
cdd4e68b
TM		 1509 status = nfs4_wait_for_completion_rpc_task(task);
1510 if (status != 0) {
1511 data->cancelled = 1;
1512 smp_wmb();
1513 } else
1514 status = data->rpc_status;
e6b3c4db 1515 rpc_put_task(task);
1da177e4
LT		 1516 return status;
1517}
1518
24ac23ab 1519static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1520{
24ac23ab
TM		 1521 struct nfs4_opendata *data = calldata;
1522 struct nfs4_state_owner *sp = data->owner;
5138fde0 1523
24ac23ab 1524 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1525 goto out_wait;
aac00a8d
TM		 1526 /*
1527 * Check if we still need to send an OPEN call, or if we can use
1528 * a delegation instead.
1529 */
1530 if (data->state != NULL) {
1531 struct nfs_delegation *delegation;
1532
dc0b027d 1533 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1534 goto out_no_action;
aac00a8d
TM		 1535 rcu_read_lock();
1536 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1537 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1538 can_open_delegated(delegation, data->o_arg.fmode))
1539 goto unlock_no_action;
aac00a8d
TM		 1540 rcu_read_unlock();
1541 }
95b72eb0 1542 /* Update client id. */
1f0e890d 1543 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1544 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1545 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1546 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1547 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1548 }
26e976a8 1549 data->timestamp = jiffies;
035168ab 1550 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1551 &data->o_arg.seq_args,
2240a9e2
TM		 1552 &data->o_res.seq_res,
1553 task) != 0)
1554 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1555 return;
652f89f6
TM		 1556unlock_no_action:
1557 rcu_read_unlock();
6ee41268
TM		 1558out_no_action:
1559 task->tk_action = NULL;
c8da19b9 1560out_wait:
b75ad4cd 1561 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1562}
1563
24ac23ab
TM		 1564static void nfs4_open_done(struct rpc_task *task, void *calldata)
1565{
1566 struct nfs4_opendata *data = calldata;
1da177e4 1567
24ac23ab 1568 data->rpc_status = task->tk_status;
d898528c 1569
14516c3a
TM		 1570 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1571 return;
d898528c 1572
24ac23ab 1573 if (task->tk_status == 0) {
807d66d8
TM		 1574 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1575 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1576 case S_IFREG:
1577 break;
1578 case S_IFLNK:
24ac23ab 1579 data->rpc_status = -ELOOP;
6f926b5b
TM		 1580 break;
1581 case S_IFDIR:
24ac23ab 1582 data->rpc_status = -EISDIR;
6f926b5b
TM		 1583 break;
1584 default:
24ac23ab 1585 data->rpc_status = -ENOTDIR;
807d66d8 1586 }
6f926b5b 1587 }
26e976a8 1588 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1589 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1590 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1591 }
3e309914 1592 data->rpc_done = 1;
24ac23ab 1593}
6f926b5b 1594
24ac23ab
TM		 1595static void nfs4_open_release(void *calldata)
1596{
1597 struct nfs4_opendata *data = calldata;
1598 struct nfs4_state *state = NULL;
1599
1600 /* If this request hasn't been cancelled, do nothing */
1601 if (data->cancelled == 0)
1602 goto out_free;
1603 /* In case of error, no cleanup! */
3e309914 1604 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1605 goto out_free;
1606 /* In case we need an open_confirm, no cleanup! */
1607 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1608 goto out_free;
24ac23ab 1609 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1610 if (!IS_ERR(state))
643168c2 1611 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1612out_free:
c6d00e63 1613 nfs4_opendata_put(data);
24ac23ab
TM		 1614}
1615
1616static const struct rpc_call_ops nfs4_open_ops = {
1617 .rpc_call_prepare = nfs4_open_prepare,
1618 .rpc_call_done = nfs4_open_done,
1619 .rpc_release = nfs4_open_release,
1620};
1621
b257957e 1622static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1623{
1624 struct inode *dir = data->dir->d_inode;
1625 struct nfs_server *server = NFS_SERVER(dir);
1626 struct nfs_openargs *o_arg = &data->o_arg;
1627 struct nfs_openres *o_res = &data->o_res;
1628 struct rpc_task *task;
5138fde0
TM		 1629 struct rpc_message msg = {
1630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1631 .rpc_argp = o_arg,
1632 .rpc_resp = o_res,
1633 .rpc_cred = data->owner->so_cred,
1634 };
c970aa85
TM		 1635 struct rpc_task_setup task_setup_data = {
1636 .rpc_client = server->client,
5138fde0 1637 .rpc_message = &msg,
c970aa85
TM		 1638 .callback_ops = &nfs4_open_ops,
1639 .callback_data = data,
101070ca 1640 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1641 .flags = RPC_TASK_ASYNC,
1642 };
24ac23ab
TM		 1643 int status;
1644
9d12b216 1645 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1646 kref_get(&data->kref);
3e309914
TM		 1647 data->rpc_done = 0;
1648 data->rpc_status = 0;
2ced46c2 1649 data->cancelled = 0;
b257957e 1650 if (isrecover)
8fe72bac 1651 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1652 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1653 if (IS_ERR(task))
1654 return PTR_ERR(task);
1655 status = nfs4_wait_for_completion_rpc_task(task);
1656 if (status != 0) {
1657 data->cancelled = 1;
1658 smp_wmb();
1659 } else
1660 status = data->rpc_status;
1661 rpc_put_task(task);
1662
1663 return status;
1664}
1665
1666static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1667{
1668 struct inode *dir = data->dir->d_inode;
1669 struct nfs_openres *o_res = &data->o_res;
1670 int status;
1671
1672 status = nfs4_run_open_task(data, 1);
1673 if (status != 0 || !data->rpc_done)
1674 return status;
1675
6926afd1
TM		 1676 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1677
b257957e
AB		 1678 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1679 status = _nfs4_proc_open_confirm(data);
1680 if (status != 0)
1681 return status;
1682 }
1683
1684 return status;
1685}
1686
6168f62c
WAA		 1687static int nfs4_opendata_access(struct rpc_cred *cred,
1688 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1689 struct nfs4_state *state, fmode_t fmode,
1690 int openflags)
6168f62c
WAA		 1691{
1692 struct nfs_access_entry cache;
1693 u32 mask;
1694
1695 /* access call failed or for some reason the server doesn't
1696 * support any access modes -- defer access call until later */
1697 if (opendata->o_res.access_supported == 0)
1698 return 0;
1699
1700 mask = 0;
bbd3a8ee 1701 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1702 * write mode bits, but POSIX allows the creating process to write.
1703 * use openflags to check for exec, because fmode won't
1704 * always have FMODE_EXEC set when file open for exec. */
1705 if (openflags & __FMODE_EXEC) {
1706 /* ONLY check for exec rights */
1707 mask = MAY_EXEC;
1708 } else if (fmode & FMODE_READ)
1709 mask = MAY_READ;
6168f62c
WAA		 1710
1711 cache.cred = cred;
1712 cache.jiffies = jiffies;
1713 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1714 nfs_access_add_cache(state->inode, &cache);
1715
bbd3a8ee 1716 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1717 return 0;
1718
1719 /* even though OPEN succeeded, access is denied. Close the file */
1720 nfs4_close_state(state, fmode);
998f40b5 1721 return -EACCES;
6168f62c
WAA		 1722}
1723
b257957e
AB		 1724/*
1725 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1726 */
1727static int _nfs4_proc_open(struct nfs4_opendata *data)
1728{
1729 struct inode *dir = data->dir->d_inode;
1730 struct nfs_server *server = NFS_SERVER(dir);
1731 struct nfs_openargs *o_arg = &data->o_arg;
1732 struct nfs_openres *o_res = &data->o_res;
1733 int status;
1734
1735 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1736 if (!data->rpc_done)
1737 return status;
1738 if (status != 0) {
1739 if (status == -NFS4ERR_BADNAME &&
1740 !(o_arg->open_flags & O_CREAT))
1741 return -ENOENT;
24ac23ab 1742 return status;
08ef7bd3 1743 }
24ac23ab 1744
6926afd1
TM		 1745 nfs_fattr_map_and_free_names(server, &data->f_attr);
1746
90ff0c54 1747 if (o_arg->open_flags & O_CREAT)
56ae19f3 1748 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1749 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1750 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1751 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1752 status = _nfs4_proc_open_confirm(data);
1da177e4 1753 if (status != 0)
24ac23ab 1754 return status;
1da177e4
LT		 1755 }
1756 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1757 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1758 return 0;
1da177e4
LT		 1759}
1760
d83217c1
AA		 1761static int nfs4_recover_expired_lease(struct nfs_server *server)
1762{
1763 return nfs4_client_recover_expired_lease(server->nfs_client);
1764}
1765
1da177e4
LT		 1766/*
1767 * OPEN_EXPIRED:
1768 * reclaim state on the server after a network partition.
1769 * Assumes caller holds the appropriate lock
1770 */
539cd03a 1771static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1772{
e56e0b78 1773 struct nfs4_opendata *opendata;
864472e9 1774 int ret;
1da177e4 1775
4a1c0893 1776 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1777 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1778 if (IS_ERR(opendata))
1779 return PTR_ERR(opendata);
864472e9 1780 ret = nfs4_open_recover(opendata, state);
35d05778 1781 if (ret == -ESTALE)
3d4ff43d 1782 d_drop(ctx->dentry);
c6d00e63 1783 nfs4_opendata_put(opendata);
864472e9 1784 return ret;
1da177e4
LT		 1785}
1786
a9ed2e25 1787static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1788{
539cd03a 1789 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1790 struct nfs4_exception exception = { };
1791 int err;
1792
1793 do {
539cd03a 1794 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1795 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1796 continue;
a9ed2e25
TM		 1797 switch (err) {
1798 default:
1799 goto out;
1800 case -NFS4ERR_GRACE:
1801 case -NFS4ERR_DELAY:
1802 nfs4_handle_exception(server, err, &exception);
1803 err = 0;
1804 }
202b50dc 1805 } while (exception.retry);
a9ed2e25 1806out:
202b50dc
TM		 1807 return err;
1808}
1809
1da177e4
LT		 1810static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1811{
1da177e4 1812 struct nfs_open_context *ctx;
864472e9 1813 int ret;
1da177e4 1814
864472e9
TM		 1815 ctx = nfs4_state_find_open_context(state);
1816 if (IS_ERR(ctx))
91876b13 1817 return -EAGAIN;
539cd03a 1818 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1819 put_nfs_open_context(ctx);
1820 return ret;
1da177e4
LT		 1821}
1822
f062eb6c 1823#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1824static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1825{
f062eb6c 1826 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1827 nfs4_stateid *stateid = &state->stateid;
1828 int status;
1829
1830 /* If a state reset has been done, test_stateid is unneeded */
1831 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1832 return;
1833
1834 status = nfs41_test_stateid(server, stateid);
1835 if (status != NFS_OK) {
1836 /* Free the stateid unless the server explicitly
1837 * informs us the stateid is unrecognized. */
1838 if (status != -NFS4ERR_BAD_STATEID)
1839 nfs41_free_stateid(server, stateid);
6938867e 1840 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1841
6938867e
BS		 1842 write_seqlock(&state->seqlock);
1843 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1844 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1845 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1846 }
1847}
1848
1849/**
1850 * nfs41_check_open_stateid - possibly free an open stateid
1851 *
1852 * @state: NFSv4 state for an inode
1853 *
1854 * Returns NFS_OK if recovery for this stateid is now finished.
1855 * Otherwise a negative NFS4ERR value is returned.
1856 */
1857static int nfs41_check_open_stateid(struct nfs4_state *state)
1858{
1859 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1860 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1861 int status;
1862
1863 /* If a state reset has been done, test_stateid is unneeded */
1864 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1865 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1866 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1867 return -NFS4ERR_BAD_STATEID;
1868
1869 status = nfs41_test_stateid(server, stateid);
1870 if (status != NFS_OK) {
1871 /* Free the stateid unless the server explicitly
1872 * informs us the stateid is unrecognized. */
1873 if (status != -NFS4ERR_BAD_STATEID)
1874 nfs41_free_stateid(server, stateid);
1875
1876 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1877 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1878 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1879 }
1880 return status;
1881}
1882
1883static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1884{
eb64cf96 1885 int status;
b01dd1d8 1886
3e60ffdd
CL		 1887 nfs41_clear_delegation_stateid(state);
1888 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1889 if (status != NFS_OK)
1890 status = nfs4_open_expired(sp, state);
1891 return status;
f062eb6c
BS		 1892}
1893#endif
1894
aa53ed54
JL		 1895/*
1896 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1897 * fields corresponding to attributes that were used to store the verifier.
1898 * Make sure we clobber those fields in the later setattr call
1899 */
1900static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1901{
1902 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1903 !(sattr->ia_valid & ATTR_ATIME_SET))
1904 sattr->ia_valid |= ATTR_ATIME;
1905
1906 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1907 !(sattr->ia_valid & ATTR_MTIME_SET))
1908 sattr->ia_valid |= ATTR_MTIME;
1909}
1910
c21443c2
TM		 1911static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1912 fmode_t fmode,
1913 int flags,
1914 struct nfs4_state **res)
1915{
1916 struct nfs4_state_owner *sp = opendata->owner;
1917 struct nfs_server *server = sp->so_server;
1918 struct nfs4_state *state;
1919 unsigned int seq;
1920 int ret;
1921
1922 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1923
1924 ret = _nfs4_proc_open(opendata);
1925 if (ret != 0)
1926 goto out;
1927
1928 state = nfs4_opendata_to_nfs4_state(opendata);
1929 ret = PTR_ERR(state);
1930 if (IS_ERR(state))
1931 goto out;
1932 if (server->caps & NFS_CAP_POSIX_LOCK)
1933 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1934
1935 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1936 if (ret != 0)
1937 goto out;
1938
91876b13 1939 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1940 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1941 *res = state;
1942out:
1943 return ret;
1944}
1945
1da177e4 1946/*
24ac23ab 1947 * Returns a referenced nfs4_state
1da177e4 1948 */
82be417a
AA		 1949static int _nfs4_do_open(struct inode *dir,
1950 struct dentry *dentry,
1951 fmode_t fmode,
1952 int flags,
1953 struct iattr *sattr,
1954 struct rpc_cred *cred,
1955 struct nfs4_state **res,
1956 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1957{
1958 struct nfs4_state_owner *sp;
1959 struct nfs4_state *state = NULL;
1960 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1961 struct nfs4_opendata *opendata;
49f9a0fa 1962 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1963 int status;
1da177e4
LT		 1964
1965 /* Protect against reboot recovery conflicts */
1da177e4 1966 status = -ENOMEM;
d1e284d5
TM		 1967 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1968 if (sp == NULL) {
1da177e4
LT		 1969 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1970 goto out_err;
1971 }
58d9714a
TM		 1972 status = nfs4_recover_expired_lease(server);
1973 if (status != 0)
b4454fe1 1974 goto err_put_state_owner;
82a2c1b7
AV		 1975 if (dentry->d_inode != NULL)
1976 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1977 status = -ENOMEM;
49f9a0fa
TM		 1978 if (dentry->d_inode)
1979 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1980 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1981 claim, GFP_KERNEL);
e56e0b78 1982 if (opendata == NULL)
95d35cb4 1983 goto err_put_state_owner;
1da177e4 1984
82be417a
AA		 1985 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1986 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1987 if (!opendata->f_attr.mdsthreshold)
1988 goto err_opendata_put;
1549210f 1989 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1990 }
82a2c1b7
AV		 1991 if (dentry->d_inode != NULL)
1992 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1993
c21443c2 1994 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1995 if (status != 0)
1996 goto err_opendata_put;
1997
0ab64e0e
TM		 1998 if (opendata->o_arg.open_flags & O_EXCL) {
1999 nfs4_exclusive_attrset(opendata, sattr);
2000
2001 nfs_fattr_init(opendata->o_res.f_attr);
2002 status = nfs4_do_setattr(state->inode, cred,
2003 opendata->o_res.f_attr, sattr,
2004 state);
2005 if (status == 0)
2006 nfs_setattr_update_inode(state->inode, sattr);
2007 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2008 }
82be417a
AA		 2009
2010 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2011 *ctx_th = opendata->f_attr.mdsthreshold;
2012 else
2013 kfree(opendata->f_attr.mdsthreshold);
2014 opendata->f_attr.mdsthreshold = NULL;
2015
c6d00e63 2016 nfs4_opendata_put(opendata);
1da177e4 2017 nfs4_put_state_owner(sp);
1da177e4
LT		 2018 *res = state;
2019 return 0;
c6d00e63 2020err_opendata_put:
82be417a 2021 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2022 nfs4_opendata_put(opendata);
e56e0b78
TM		 2023err_put_state_owner:
2024 nfs4_put_state_owner(sp);
1da177e4 2025out_err:
1da177e4
LT		 2026 *res = NULL;
2027 return status;
2028}
2029
2030
82be417a
AA		 2031static struct nfs4_state *nfs4_do_open(struct inode *dir,
2032 struct dentry *dentry,
2033 fmode_t fmode,
2034 int flags,
2035 struct iattr *sattr,
2036 struct rpc_cred *cred,
2037 struct nfs4_threshold **ctx_th)
1da177e4 2038{
49f9a0fa 2039 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2040 struct nfs4_exception exception = { };
2041 struct nfs4_state *res;
2042 int status;
2043
6168f62c 2044 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2045 do {
82be417a
AA		 2046 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2047 &res, ctx_th);
1da177e4
LT		 2048 if (status == 0)
2049 break;
2050 /* NOTE: BAD_SEQID means the server and client disagree about the
2051 * book-keeping w.r.t. state-changing operations
2052 * (OPEN/CLOSE/LOCK/LOCKU...)
2053 * It is actually a sign of a bug on the client or on the server.
2054 *
2055 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2056 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2057 * have unhashed the old state_owner for us, and that we can
2058 * therefore safely retry using a new one. We should still warn
2059 * the user though...
2060 */
2061 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2062 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2063 " returned a bad sequence-id error!\n",
2064 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2065 exception.retry = 1;
2066 continue;
2067 }
550f5747
TM		 2068 /*
2069 * BAD_STATEID on OPEN means that the server cancelled our
2070 * state before it received the OPEN_CONFIRM.
2071 * Recover by retrying the request as per the discussion
2072 * on Page 181 of RFC3530.
2073 */
2074 if (status == -NFS4ERR_BAD_STATEID) {
2075 exception.retry = 1;
2076 continue;
2077 }
aac00a8d
TM		 2078 if (status == -EAGAIN) {
2079 /* We must have found a delegation */
2080 exception.retry = 1;
2081 continue;
2082 }
49f9a0fa
TM		 2083 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2084 continue;
2085 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2086 status, &exception));
2087 } while (exception.retry);
2088 return res;
2089}
2090
659bfcd6
TM		 2091static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2092 struct nfs_fattr *fattr, struct iattr *sattr,
2093 struct nfs4_state *state)
1da177e4 2094{
3e4f6290 2095 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2096 struct nfs_setattrargs arg = {
3e4f6290 2097 .fh = NFS_FH(inode),
1da177e4
LT		 2098 .iap = sattr,
2099 .server = server,
2100 .bitmask = server->attr_bitmask,
2101 };
2102 struct nfs_setattrres res = {
2103 .fattr = fattr,
2104 .server = server,
2105 };
2106 struct rpc_message msg = {
659bfcd6
TM		 2107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2108 .rpc_argp = &arg,
2109 .rpc_resp = &res,
2110 .rpc_cred = cred,
1da177e4 2111 };
26e976a8 2112 unsigned long timestamp = jiffies;
65e4308d 2113 int status;
1da177e4 2114
0e574af1 2115 nfs_fattr_init(fattr);
1da177e4 2116
5d422301 2117 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2118 struct nfs_lockowner lockowner = {
2119 .l_owner = current->files,
2120 .l_pid = current->tgid,
2121 };
4fc8796d 2122 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2123 &lockowner);
4fc8796d
TM		 2124 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2125 FMODE_WRITE)) {
3e4f6290 2126 /* Use that stateid */
08e9eac4 2127 } else
f597c537 2128 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2129
7c513058 2130 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2131 if (status == 0 && state != NULL)
2132 renew_lease(server, timestamp);
65e4308d 2133 return status;
1da177e4
LT		 2134}
2135
659bfcd6
TM		 2136static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2137 struct nfs_fattr *fattr, struct iattr *sattr,
2138 struct nfs4_state *state)
1da177e4 2139{
3e4f6290 2140 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2141 struct nfs4_exception exception = {
2142 .state = state,
3114ea7a 2143 .inode = inode,
a1d0b5ee 2144 };
1da177e4
LT		 2145 int err;
2146 do {
451146be
TM		 2147 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2148 switch (err) {
2149 case -NFS4ERR_OPENMODE:
2150 if (state && !(state->state & FMODE_WRITE)) {
2151 err = -EBADF;
2152 if (sattr->ia_valid & ATTR_OPEN)
2153 err = -EACCES;
2154 goto out;
2155 }
2156 }
2157 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2158 } while (exception.retry);
451146be 2159out:
1da177e4
LT		 2160 return err;
2161}
2162
2163struct nfs4_closedata {
2164 struct inode *inode;
2165 struct nfs4_state *state;
2166 struct nfs_closeargs arg;
2167 struct nfs_closeres res;
516a6af6 2168 struct nfs_fattr fattr;
26e976a8 2169 unsigned long timestamp;
f7e8917a
FI		 2170 bool roc;
2171 u32 roc_barrier;
1da177e4
LT		 2172};
2173
963d8fe5 2174static void nfs4_free_closedata(void *data)
9512135d 2175{
963d8fe5
TM		 2176 struct nfs4_closedata *calldata = data;
2177 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2178 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2179
f7e8917a
FI		 2180 if (calldata->roc)
2181 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2182 nfs4_put_open_state(calldata->state);
2183 nfs_free_seqid(calldata->arg.seqid);
9512135d 2184 nfs4_put_state_owner(sp);
322b2b90 2185 nfs_sb_deactive(sb);
9512135d
TM		 2186 kfree(calldata);
2187}
2188
88069f77
TM		 2189static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2190 fmode_t fmode)
2191{
2192 spin_lock(&state->owner->so_lock);
2193 if (!(fmode & FMODE_READ))
2194 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2195 if (!(fmode & FMODE_WRITE))
2196 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2197 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2198 spin_unlock(&state->owner->so_lock);
2199}
2200
963d8fe5 2201static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2202{
963d8fe5 2203 struct nfs4_closedata *calldata = data;
1da177e4 2204 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2205 struct nfs_server *server = NFS_SERVER(calldata->inode);
2206
a3ca5651 2207 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2208 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2209 return;
1da177e4
LT		 2210 /* hmm. we are done with the inode, and in the process of freeing
2211 * the state_owner. we keep this around to process errors
2212 */
1da177e4
LT		 2213 switch (task->tk_status) {
2214 case 0:
f7e8917a
FI		 2215 if (calldata->roc)
2216 pnfs_roc_set_barrier(state->inode,
2217 calldata->roc_barrier);
45328c35 2218 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2219 renew_lease(server, calldata->timestamp);
88069f77
TM		 2220 nfs4_close_clear_stateid_flags(state,
2221 calldata->arg.fmode);
1da177e4
LT		 2222 break;
2223 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2224 case -NFS4ERR_OLD_STATEID:
2225 case -NFS4ERR_BAD_STATEID:
1da177e4 2226 case -NFS4ERR_EXPIRED:
dc0b027d 2227 if (calldata->arg.fmode == 0)
9e33bed5 2228 break;
1da177e4 2229 default:
72211dbe
TM		 2230 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2231 rpc_restart_call_prepare(task);
1da177e4 2232 }
72211dbe 2233 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2234 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2235 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2236}
2237
4ce70ada 2238static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2239{
4ce70ada 2240 struct nfs4_closedata *calldata = data;
9512135d 2241 struct nfs4_state *state = calldata->state;
7fdab069 2242 struct inode *inode = calldata->inode;
88069f77 2243 int call_close = 0;
9512135d 2244
a3ca5651 2245 dprintk("%s: begin!\n", __func__);
963d8fe5 2246 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2247 goto out_wait;
003707c7 2248
88069f77
TM		 2249 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2250 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2251 spin_lock(&state->owner->so_lock);
003707c7 2252 /* Calculate the change in open mode */
e7616923 2253 if (state->n_rdwr == 0) {
003707c7 2254 if (state->n_rdonly == 0) {
88069f77
TM		 2255 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2256 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2257 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2258 }
2259 if (state->n_wronly == 0) {
88069f77
TM		 2260 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2261 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2262 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2263 }
e7616923 2264 }
5d422301
TM		 2265 if (!nfs4_valid_open_stateid(state))
2266 call_close = 0;
4cecb76f 2267 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2268
2269 if (!call_close) {
963d8fe5 2270 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2271 goto out_no_action;
9512135d 2272 }
88069f77 2273
f7e8917a 2274 if (calldata->arg.fmode == 0) {
88069f77 2275 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2276 if (calldata->roc &&
7fdab069 2277 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2278 goto out_wait;
f7e8917a 2279 }
88069f77 2280
516a6af6 2281 nfs_fattr_init(calldata->res.fattr);
26e976a8 2282 calldata->timestamp = jiffies;
7fdab069 2283 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2284 &calldata->arg.seq_args,
2285 &calldata->res.seq_res,
2240a9e2
TM		 2286 task) != 0)
2287 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2288 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2289 return;
2290out_no_action:
2291 task->tk_action = NULL;
2292out_wait:
2293 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2294}
2295
963d8fe5 2296static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2297 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2298 .rpc_call_done = nfs4_close_done,
2299 .rpc_release = nfs4_free_closedata,
2300};
2301
1da177e4
LT		 2302/*
2303 * It is possible for data to be read/written from a mem-mapped file
2304 * after the sys_close call (which hits the vfs layer as a flush).
2305 * This means that we can't safely call nfsv4 close on a file until
2306 * the inode is cleared. This in turn means that we are not good
2307 * NFSv4 citizens - we do not indicate to the server to update the file's
2308 * share state even when we are done with one of the three share
2309 * stateid's in the inode.
2310 *
2311 * NOTE: Caller must be holding the sp->so_owner semaphore!
2312 */
1f7977c1 2313int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2314{
4a35bd41 2315 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2316 struct nfs4_closedata *calldata;
b39e625b
TM		 2317 struct nfs4_state_owner *sp = state->owner;
2318 struct rpc_task *task;
5138fde0
TM		 2319 struct rpc_message msg = {
2320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2321 .rpc_cred = state->owner->so_cred,
2322 };
c970aa85
TM		 2323 struct rpc_task_setup task_setup_data = {
2324 .rpc_client = server->client,
5138fde0 2325 .rpc_message = &msg,
c970aa85 2326 .callback_ops = &nfs4_close_ops,
101070ca 2327 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2328 .flags = RPC_TASK_ASYNC,
2329 };
9512135d 2330 int status = -ENOMEM;
1da177e4 2331
8535b2be 2332 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2333 if (calldata == NULL)
9512135d 2334 goto out;
9d12b216 2335 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2336 calldata->inode = state->inode;
1da177e4 2337 calldata->state = state;
4a35bd41 2338 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2339 calldata->arg.stateid = &state->open_stateid;
1da177e4 2340 /* Serialization for the sequence id */
8535b2be 2341 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2342 if (calldata->arg.seqid == NULL)
2343 goto out_free_calldata;
dc0b027d 2344 calldata->arg.fmode = 0;
a65318bf 2345 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2346 calldata->res.fattr = &calldata->fattr;
c1d51931 2347 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2348 calldata->res.server = server;
1f7977c1 2349 calldata->roc = pnfs_roc(state->inode);
643168c2 2350 nfs_sb_active(calldata->inode->i_sb);
9512135d 2351
1174dd1f
TM		 2352 msg.rpc_argp = &calldata->arg;
2353 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2354 task_setup_data.callback_data = calldata;
2355 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2356 if (IS_ERR(task))
2357 return PTR_ERR(task);
a49c3c77
TM		 2358 status = 0;
2359 if (wait)
2360 status = rpc_wait_for_completion_task(task);
b39e625b 2361 rpc_put_task(task);
a49c3c77 2362 return status;
9512135d
TM		 2363out_free_calldata:
2364 kfree(calldata);
2365out:
b39e625b
TM		 2366 nfs4_put_open_state(state);
2367 nfs4_put_state_owner(sp);
9512135d 2368 return status;
1da177e4
LT		 2369}
2370
2b484297 2371static struct inode *
cd9a1c0e 2372nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2373{
1da177e4 2374 struct nfs4_state *state;
1da177e4 2375
565277f6 2376 /* Protect against concurrent sillydeletes */
82be417a
AA		 2377 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2378 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2379 if (IS_ERR(state))
2380 return ERR_CAST(state);
cd9a1c0e 2381 ctx->state = state;
f46e0bd3 2382 return igrab(state->inode);
1da177e4
LT		 2383}
2384
1185a552 2385static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2386{
2387 if (ctx->state == NULL)
2388 return;
2389 if (is_sync)
643168c2 2390 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2391 else
643168c2 2392 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2393}
1da177e4
LT		 2394
2395static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2396{
43652ad5
BH		 2397 struct nfs4_server_caps_arg args = {
2398 .fhandle = fhandle,
2399 };
1da177e4
LT		 2400 struct nfs4_server_caps_res res = {};
2401 struct rpc_message msg = {
2402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2403 .rpc_argp = &args,
1da177e4
LT		 2404 .rpc_resp = &res,
2405 };
2406 int status;
2407
7c513058 2408 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2409 if (status == 0) {
2410 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2411 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2412 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2413 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2414 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2415 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2416 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2417 server->caps |= NFS_CAP_ACLS;
2418 if (res.has_links != 0)
2419 server->caps |= NFS_CAP_HARDLINKS;
2420 if (res.has_symlinks != 0)
2421 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2422 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2423 server->caps |= NFS_CAP_FILEID;
2424 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2425 server->caps |= NFS_CAP_MODE;
2426 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2427 server->caps |= NFS_CAP_NLINK;
2428 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2429 server->caps |= NFS_CAP_OWNER;
2430 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2431 server->caps |= NFS_CAP_OWNER_GROUP;
2432 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2433 server->caps |= NFS_CAP_ATIME;
2434 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2435 server->caps |= NFS_CAP_CTIME;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2437 server->caps |= NFS_CAP_MTIME;
2438
a65318bf
TM		 2439 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2440 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2441 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2442 server->acl_bitmask = res.acl_bitmask;
264e6351 2443 server->fh_expire_type = res.fh_expire_type;
1da177e4 2444 }
cccef3b9 2445
1da177e4
LT		 2446 return status;
2447}
2448
55a97593 2449int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2450{
2451 struct nfs4_exception exception = { };
2452 int err;
2453 do {
2454 err = nfs4_handle_exception(server,
2455 _nfs4_server_capabilities(server, fhandle),
2456 &exception);
2457 } while (exception.retry);
2458 return err;
2459}
2460
2461static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2462 struct nfs_fsinfo *info)
2463{
1da177e4
LT		 2464 struct nfs4_lookup_root_arg args = {
2465 .bitmask = nfs4_fattr_bitmap,
2466 };
2467 struct nfs4_lookup_res res = {
2468 .server = server,
0e574af1 2469 .fattr = info->fattr,
1da177e4
LT		 2470 .fh = fhandle,
2471 };
2472 struct rpc_message msg = {
2473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2474 .rpc_argp = &args,
2475 .rpc_resp = &res,
2476 };
008f55d0 2477
0e574af1 2478 nfs_fattr_init(info->fattr);
7c513058 2479 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2480}
2481
2482static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2483 struct nfs_fsinfo *info)
2484{
2485 struct nfs4_exception exception = { };
2486 int err;
2487 do {
fb8a5ba8
BS		 2488 err = _nfs4_lookup_root(server, fhandle, info);
2489 switch (err) {
2490 case 0:
2491 case -NFS4ERR_WRONGSEC:
05e9cfb4 2492 goto out;
fb8a5ba8
BS		 2493 default:
2494 err = nfs4_handle_exception(server, err, &exception);
2495 }
1da177e4 2496 } while (exception.retry);
05e9cfb4 2497out:
1da177e4
LT		 2498 return err;
2499}
2500
8f70e95f
BS		 2501static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2502 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2503{
2504 struct rpc_auth *auth;
2505 int ret;
2506
2507 auth = rpcauth_create(flavor, server->client);
e8d920c5 2508 if (IS_ERR(auth)) {
8f70e95f
BS		 2509 ret = -EIO;
2510 goto out;
2511 }
2512 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2513out:
2514 return ret;
2515}
2516
801a16dc 2517static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2518 struct nfs_fsinfo *info)
1da177e4 2519{
8f70e95f 2520 int i, len, status = 0;
0fabee24 2521 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2522
6a1a1e34 2523 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2524 if (len < 0)
2525 return len;
8f70e95f
BS		 2526
2527 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2528 /* AUTH_UNIX is the default flavor if none was specified,
2529 * thus has already been tried. */
2530 if (flav_array[i] == RPC_AUTH_UNIX)
2531 continue;
2532
8f70e95f 2533 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2534 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2535 continue;
2536 break;
8f70e95f 2537 }
fb8a5ba8
BS		 2538 /*
2539 * -EACCESS could mean that the user doesn't have correct permissions
2540 * to access the mount. It could also mean that we tried to mount
2541 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2542 * existing mount programs don't handle -EACCES very well so it should
2543 * be mapped to -EPERM instead.
2544 */
2545 if (status == -EACCES)
2546 status = -EPERM;
801a16dc
BS		 2547 return status;
2548}
2549
2550/*
2551 * get the file handle for the "/" directory on the server
2552 */
3028eb2b
BS		 2553int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2554 struct nfs_fsinfo *info)
801a16dc 2555{
fca78d6d 2556 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2557 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2558 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2559 /*
2560 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2561 * by nfs4_map_errors() as this function exits.
2562 */
fca78d6d 2563 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2564 if (status == 0)
2565 status = nfs4_server_capabilities(server, fhandle);
2566 if (status == 0)
2567 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2568 return nfs4_map_errors(status);
1da177e4
LT		 2569}
2570
bae36241
BS		 2571static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2572 struct nfs_fsinfo *info)
2573{
2574 int error;
2575 struct nfs_fattr *fattr = info->fattr;
2576
2577 error = nfs4_server_capabilities(server, mntfh);
2578 if (error < 0) {
2579 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2580 return error;
2581 }
2582
2583 error = nfs4_proc_getattr(server, mntfh, fattr);
2584 if (error < 0) {
2585 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2586 return error;
2587 }
2588
2589 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2590 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2591 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2592
2593 return error;
2594}
2595
6b97fd3d
MN		 2596/*
2597 * Get locations and (maybe) other attributes of a referral.
2598 * Note that we'll actually follow the referral later when
2599 * we detect fsid mismatch in inode revalidation
2600 */
f05d147f
BS		 2601static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2602 const struct qstr *name, struct nfs_fattr *fattr,
2603 struct nfs_fh *fhandle)
6b97fd3d
MN		 2604{
2605 int status = -ENOMEM;
2606 struct page *page = NULL;
2607 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2608
2609 page = alloc_page(GFP_KERNEL);
2610 if (page == NULL)
2611 goto out;
2612 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2613 if (locations == NULL)
2614 goto out;
2615
f05d147f 2616 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2617 if (status != 0)
2618 goto out;
2619 /* Make sure server returned a different fsid for the referral */
2620 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2621 dprintk("%s: server did not return a different fsid for"
2622 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2623 status = -EIO;
2624 goto out;
2625 }
533eb461
AA		 2626 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2627 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2628
533eb461 2629 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2630 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2631 memset(fhandle, 0, sizeof(struct nfs_fh));
2632out:
2633 if (page)
2634 __free_page(page);
5d7ca35a 2635 kfree(locations);
6b97fd3d
MN		 2636 return status;
2637}
2638
1da177e4
LT		 2639static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2640{
2641 struct nfs4_getattr_arg args = {
2642 .fh = fhandle,
2643 .bitmask = server->attr_bitmask,
2644 };
2645 struct nfs4_getattr_res res = {
2646 .fattr = fattr,
2647 .server = server,
2648 };
2649 struct rpc_message msg = {
2650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2651 .rpc_argp = &args,
2652 .rpc_resp = &res,
2653 };
2654
0e574af1 2655 nfs_fattr_init(fattr);
7c513058 2656 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2657}
2658
2659static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2660{
2661 struct nfs4_exception exception = { };
2662 int err;
2663 do {
2664 err = nfs4_handle_exception(server,
2665 _nfs4_proc_getattr(server, fhandle, fattr),
2666 &exception);
2667 } while (exception.retry);
2668 return err;
2669}
2670
2671/*
2672 * The file is not closed if it is opened due to the a request to change
2673 * the size of the file. The open call will not be needed once the
2674 * VFS layer lookup-intents are implemented.
2675 *
2676 * Close is called when the inode is destroyed.
2677 * If we haven't opened the file for O_WRONLY, we
2678 * need to in the size_change case to obtain a stateid.
2679 *
2680 * Got race?
2681 * Because OPEN is always done by name in nfsv4, it is
2682 * possible that we opened a different file by the same
2683 * name. We can recognize this race condition, but we
2684 * can't do anything about it besides returning an error.
2685 *
2686 * This will be fixed with VFS changes (lookup-intent).
2687 */
2688static int
2689nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2690 struct iattr *sattr)
2691{
08e9eac4 2692 struct inode *inode = dentry->d_inode;
659bfcd6 2693 struct rpc_cred *cred = NULL;
d530838b 2694 struct nfs4_state *state = NULL;
1da177e4
LT		 2695 int status;
2696
8a1636c4 2697 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2698 pnfs_commit_and_return_layout(inode);
8a1636c4 2699
0e574af1 2700 nfs_fattr_init(fattr);
1da177e4 2701
2669940d
AA		 2702 /* Deal with open(O_TRUNC) */
2703 if (sattr->ia_valid & ATTR_OPEN)
2704 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2705
2706 /* Optimization: if the end result is no change, don't RPC */
2707 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2708 return 0;
2709
d530838b 2710 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2711 if (sattr->ia_valid & ATTR_FILE) {
2712 struct nfs_open_context *ctx;
2713
2714 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2715 if (ctx) {
2716 cred = ctx->cred;
2717 state = ctx->state;
2718 }
659bfcd6 2719 }
08e9eac4 2720
659bfcd6 2721 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2722 if (status == 0)
2723 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2724 return status;
2725}
2726
0c2e53f1
TM		 2727static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2728 const struct qstr *name, struct nfs_fh *fhandle,
2729 struct nfs_fattr *fattr)
2b3de441 2730{
0c2e53f1 2731 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2732 int status;
2733 struct nfs4_lookup_arg args = {
2734 .bitmask = server->attr_bitmask,
0c2e53f1 2735 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2736 .name = name,
2737 };
2738 struct nfs4_lookup_res res = {
2739 .server = server,
2740 .fattr = fattr,
2741 .fh = fhandle,
2742 };
2743 struct rpc_message msg = {
2744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2745 .rpc_argp = &args,
2746 .rpc_resp = &res,
2747 };
2748
2749 nfs_fattr_init(fattr);
2750
1da177e4 2751 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2752 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2753 dprintk("NFS reply lookup: %d\n", status);
2754 return status;
2755}
2756
72de53ec 2757static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2758{
7ebb9315 2759 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2760 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2761 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2762 fattr->nlink = 2;
2763}
2764
72de53ec
BS		 2765static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2766 struct qstr *name, struct nfs_fh *fhandle,
2767 struct nfs_fattr *fattr)
1da177e4
LT		 2768{
2769 struct nfs4_exception exception = { };
72de53ec 2770 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2771 int err;
2772 do {
72de53ec
BS		 2773 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2774 switch (err) {
08ef7bd3 2775 case -NFS4ERR_BADNAME:
72de53ec
BS		 2776 err = -ENOENT;
2777 goto out;
0c2e53f1 2778 case -NFS4ERR_MOVED:
f05d147f 2779 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2780 goto out;
0c2e53f1 2781 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2782 err = -EPERM;
2783 if (client != *clnt)
2784 goto out;
2785
2786 client = nfs4_create_sec_client(client, dir, name);
2787 if (IS_ERR(client))
2788 return PTR_ERR(client);
2789
2790 exception.retry = 1;
2791 break;
2792 default:
2793 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2794 }
1da177e4 2795 } while (exception.retry);
72de53ec
BS		 2796
2797out:
2798 if (err == 0)
2799 *clnt = client;
2800 else if (client != *clnt)
2801 rpc_shutdown_client(client);
2802
1da177e4
LT		 2803 return err;
2804}
2805
80a16b21 2806static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2807 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2808{
2809 int status;
2810 struct rpc_clnt *client = NFS_CLIENT(dir);
2811
2812 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2813 if (client != NFS_CLIENT(dir)) {
2814 rpc_shutdown_client(client);
2815 nfs_fixup_secinfo_attributes(fattr);
2816 }
2817 return status;
2818}
2819
f05d147f
BS		 2820struct rpc_clnt *
2821nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2822 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2823{
2824 int status;
2825 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2826
2827 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2828 if (status < 0) {
2829 rpc_shutdown_client(client);
2830 return ERR_PTR(status);
2831 }
2832 return client;
2833}
2834
1da177e4
LT		 2835static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2836{
76b32999 2837 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2838 struct nfs4_accessargs args = {
2839 .fh = NFS_FH(inode),
a4980e78 2840 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2841 };
2842 struct nfs4_accessres res = {
2843 .server = server,
1da177e4 2844 };
1da177e4
LT		 2845 struct rpc_message msg = {
2846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2847 .rpc_argp = &args,
2848 .rpc_resp = &res,
2849 .rpc_cred = entry->cred,
2850 };
2851 int mode = entry->mask;
2852 int status;
2853
2854 /*
2855 * Determine which access bits we want to ask for...
2856 */
2857 if (mode & MAY_READ)
2858 args.access |= NFS4_ACCESS_READ;
2859 if (S_ISDIR(inode->i_mode)) {
2860 if (mode & MAY_WRITE)
2861 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2862 if (mode & MAY_EXEC)
2863 args.access |= NFS4_ACCESS_LOOKUP;
2864 } else {
2865 if (mode & MAY_WRITE)
2866 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2867 if (mode & MAY_EXEC)
2868 args.access |= NFS4_ACCESS_EXECUTE;
2869 }
c407d41a
TM		 2870
2871 res.fattr = nfs_alloc_fattr();
2872 if (res.fattr == NULL)
2873 return -ENOMEM;
2874
7c513058 2875 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2876 if (!status) {
6168f62c 2877 nfs_access_set_mask(entry, res.access);
c407d41a 2878 nfs_refresh_inode(inode, res.fattr);
1da177e4 2879 }
c407d41a 2880 nfs_free_fattr(res.fattr);
1da177e4
LT		 2881 return status;
2882}
2883
2884static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2885{
2886 struct nfs4_exception exception = { };
2887 int err;
2888 do {
2889 err = nfs4_handle_exception(NFS_SERVER(inode),
2890 _nfs4_proc_access(inode, entry),
2891 &exception);
2892 } while (exception.retry);
2893 return err;
2894}
2895
2896/*
2897 * TODO: For the time being, we don't try to get any attributes
2898 * along with any of the zero-copy operations READ, READDIR,
2899 * READLINK, WRITE.
2900 *
2901 * In the case of the first three, we want to put the GETATTR
2902 * after the read-type operation -- this is because it is hard
2903 * to predict the length of a GETATTR response in v4, and thus
2904 * align the READ data correctly. This means that the GETATTR
2905 * may end up partially falling into the page cache, and we should
2906 * shift it into the 'tail' of the xdr_buf before processing.
2907 * To do this efficiently, we need to know the total length
2908 * of data received, which doesn't seem to be available outside
2909 * of the RPC layer.
2910 *
2911 * In the case of WRITE, we also want to put the GETATTR after
2912 * the operation -- in this case because we want to make sure
140150db 2913 * we get the post-operation mtime and size.
1da177e4
LT		 2914 *
2915 * Both of these changes to the XDR layer would in fact be quite
2916 * minor, but I decided to leave them for a subsequent patch.
2917 */
2918static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2919 unsigned int pgbase, unsigned int pglen)
2920{
2921 struct nfs4_readlink args = {
2922 .fh = NFS_FH(inode),
2923 .pgbase = pgbase,
2924 .pglen = pglen,
2925 .pages = &page,
2926 };
f50c7000 2927 struct nfs4_readlink_res res;
1da177e4
LT		 2928 struct rpc_message msg = {
2929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2930 .rpc_argp = &args,
f50c7000 2931 .rpc_resp = &res,
1da177e4
LT		 2932 };
2933
7c513058 2934 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2935}
2936
2937static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2938 unsigned int pgbase, unsigned int pglen)
2939{
2940 struct nfs4_exception exception = { };
2941 int err;
2942 do {
2943 err = nfs4_handle_exception(NFS_SERVER(inode),
2944 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2945 &exception);
2946 } while (exception.retry);
2947 return err;
2948}
2949
1da177e4 2950/*
8867fe58 2951 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2952 */
1da177e4
LT		 2953static int
2954nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2955 int flags)
1da177e4 2956{
8867fe58 2957 struct nfs_open_context *ctx;
1da177e4 2958 struct nfs4_state *state;
1da177e4
LT		 2959 int status = 0;
2960
8867fe58
MS		 2961 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2962 if (IS_ERR(ctx))
2963 return PTR_ERR(ctx);
2964
a8a5da99 2965 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2966 state = nfs4_do_open(dir, dentry, ctx->mode,
2967 flags, sattr, ctx->cred,
2968 &ctx->mdsthreshold);
d4d9cdcb 2969 d_drop(dentry);
1da177e4
LT		 2970 if (IS_ERR(state)) {
2971 status = PTR_ERR(state);
c0204fd2 2972 goto out;
1da177e4 2973 }
d4d9cdcb 2974 d_add(dentry, igrab(state->inode));
d75340cc 2975 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2976 ctx->state = state;
1da177e4 2977out:
8867fe58 2978 put_nfs_open_context(ctx);
1da177e4
LT		 2979 return status;
2980}
2981
2982static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2983{
16e42959 2984 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2985 struct nfs_removeargs args = {
1da177e4 2986 .fh = NFS_FH(dir),
26fe5750 2987 .name = *name,
16e42959 2988 };
4fdc17b2 2989 struct nfs_removeres res = {
16e42959 2990 .server = server,
1da177e4 2991 };
1da177e4 2992 struct rpc_message msg = {
4fdc17b2
TM		 2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2994 .rpc_argp = &args,
2995 .rpc_resp = &res,
1da177e4 2996 };
778d2817 2997 int status;
1da177e4 2998
7c513058 2999 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3000 if (status == 0)
16e42959 3001 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3002 return status;
3003}
3004
3005static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3006{
3007 struct nfs4_exception exception = { };
3008 int err;
3009 do {
3010 err = nfs4_handle_exception(NFS_SERVER(dir),
3011 _nfs4_proc_remove(dir, name),
3012 &exception);
3013 } while (exception.retry);
3014 return err;
3015}
3016
e4eff1a6 3017static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3018{
e4eff1a6
TM		 3019 struct nfs_server *server = NFS_SERVER(dir);
3020 struct nfs_removeargs *args = msg->rpc_argp;
3021 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3022
e4eff1a6 3023 res->server = server;
1da177e4 3024 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3025 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3026}
3027
34e137cc
BS		 3028static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3029{
d9afbd1b
TM		 3030 nfs4_setup_sequence(NFS_SERVER(data->dir),
3031 &data->args.seq_args,
3032 &data->res.seq_res,
3033 task);
1da177e4
LT		 3034}
3035
e4eff1a6 3036static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3037{
e4eff1a6
TM		 3038 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3039
14516c3a
TM		 3040 if (!nfs4_sequence_done(task, &res->seq_res))
3041 return 0;
9e33bed5 3042 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3043 return 0;
3044 update_changeattr(dir, &res->cinfo);
e4eff1a6 3045 return 1;
1da177e4
LT		 3046}
3047
d3d4152a
JL		 3048static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3049{
3050 struct nfs_server *server = NFS_SERVER(dir);
3051 struct nfs_renameargs *arg = msg->rpc_argp;
3052 struct nfs_renameres *res = msg->rpc_resp;
3053
3054 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3055 res->server = server;
9d12b216 3056 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3057}
3058
c6bfa1a1
BS		 3059static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3060{
d9afbd1b
TM		 3061 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3062 &data->args.seq_args,
3063 &data->res.seq_res,
3064 task);
d3d4152a
JL		 3065}
3066
3067static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3068 struct inode *new_dir)
3069{
3070 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3071
3072 if (!nfs4_sequence_done(task, &res->seq_res))
3073 return 0;
3074 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3075 return 0;
3076
3077 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3078 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3079 return 1;
3080}
3081
1da177e4
LT		 3082static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3083 struct inode *new_dir, struct qstr *new_name)
3084{
6caf2c82 3085 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3086 struct nfs_renameargs arg = {
1da177e4
LT		 3087 .old_dir = NFS_FH(old_dir),
3088 .new_dir = NFS_FH(new_dir),
3089 .old_name = old_name,
3090 .new_name = new_name,
6caf2c82 3091 };
e8582a8b 3092 struct nfs_renameres res = {
6caf2c82 3093 .server = server,
1da177e4 3094 };
1da177e4
LT		 3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3097 .rpc_argp = &arg,
3098 .rpc_resp = &res,
3099 };
011fff72 3100 int status = -ENOMEM;
1da177e4 3101
7c513058 3102 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3103 if (!status) {
3104 update_changeattr(old_dir, &res.old_cinfo);
3105 update_changeattr(new_dir, &res.new_cinfo);
3106 }
3107 return status;
3108}
3109
3110static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3111 struct inode *new_dir, struct qstr *new_name)
3112{
3113 struct nfs4_exception exception = { };
3114 int err;
3115 do {
3116 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3117 _nfs4_proc_rename(old_dir, old_name,
3118 new_dir, new_name),
3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3125{
91ba2eee 3126 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3127 struct nfs4_link_arg arg = {
3128 .fh = NFS_FH(inode),
3129 .dir_fh = NFS_FH(dir),
3130 .name = name,
91ba2eee
TM		 3131 .bitmask = server->attr_bitmask,
3132 };
91ba2eee
TM		 3133 struct nfs4_link_res res = {
3134 .server = server,
1da177e4 3135 };
1da177e4
LT		 3136 struct rpc_message msg = {
3137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3138 .rpc_argp = &arg,
91ba2eee 3139 .rpc_resp = &res,
1da177e4 3140 };
136f2627
TM		 3141 int status = -ENOMEM;
3142
3143 res.fattr = nfs_alloc_fattr();
778d2817 3144 if (res.fattr == NULL)
136f2627 3145 goto out;
1da177e4 3146
7c513058 3147 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3148 if (!status) {
3149 update_changeattr(dir, &res.cinfo);
73a3d07c 3150 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3151 }
136f2627 3152out:
136f2627 3153 nfs_free_fattr(res.fattr);
1da177e4
LT		 3154 return status;
3155}
3156
3157static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3158{
3159 struct nfs4_exception exception = { };
3160 int err;
3161 do {
3162 err = nfs4_handle_exception(NFS_SERVER(inode),
3163 _nfs4_proc_link(inode, dir, name),
3164 &exception);
3165 } while (exception.retry);
3166 return err;
3167}
3168
57dc9a57
TM		 3169struct nfs4_createdata {
3170 struct rpc_message msg;
3171 struct nfs4_create_arg arg;
3172 struct nfs4_create_res res;
3173 struct nfs_fh fh;
3174 struct nfs_fattr fattr;
57dc9a57
TM		 3175};
3176
3177static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3178 struct qstr *name, struct iattr *sattr, u32 ftype)
3179{
3180 struct nfs4_createdata *data;
3181
3182 data = kzalloc(sizeof(*data), GFP_KERNEL);
3183 if (data != NULL) {
3184 struct nfs_server *server = NFS_SERVER(dir);
3185
3186 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3187 data->msg.rpc_argp = &data->arg;
3188 data->msg.rpc_resp = &data->res;
3189 data->arg.dir_fh = NFS_FH(dir);
3190 data->arg.server = server;
3191 data->arg.name = name;
3192 data->arg.attrs = sattr;
3193 data->arg.ftype = ftype;
3194 data->arg.bitmask = server->attr_bitmask;
3195 data->res.server = server;
3196 data->res.fh = &data->fh;
3197 data->res.fattr = &data->fattr;
57dc9a57 3198 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3199 }
3200 return data;
3201}
3202
3203static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3204{
7c513058 3205 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3206 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3207 if (status == 0) {
3208 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3209 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3210 }
3211 return status;
3212}
3213
3214static void nfs4_free_createdata(struct nfs4_createdata *data)
3215{
3216 kfree(data);
3217}
3218
4f390c15 3219static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3220 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3221{
57dc9a57
TM		 3222 struct nfs4_createdata *data;
3223 int status = -ENAMETOOLONG;
1da177e4 3224
94a6d753 3225 if (len > NFS4_MAXPATHLEN)
57dc9a57 3226 goto out;
4f390c15 3227
57dc9a57
TM		 3228 status = -ENOMEM;
3229 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3230 if (data == NULL)
3231 goto out;
3232
3233 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3234 data->arg.u.symlink.pages = &page;
3235 data->arg.u.symlink.len = len;
1da177e4 3236
57dc9a57
TM		 3237 status = nfs4_do_create(dir, dentry, data);
3238
3239 nfs4_free_createdata(data);
3240out:
1da177e4
LT		 3241 return status;
3242}
3243
4f390c15 3244static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3245 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3246{
3247 struct nfs4_exception exception = { };
3248 int err;
3249 do {
3250 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3251 _nfs4_proc_symlink(dir, dentry, page,
3252 len, sattr),
1da177e4
LT		 3253 &exception);
3254 } while (exception.retry);
3255 return err;
3256}
3257
3258static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3259 struct iattr *sattr)
3260{
57dc9a57
TM		 3261 struct nfs4_createdata *data;
3262 int status = -ENOMEM;
1da177e4 3263
57dc9a57
TM		 3264 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3265 if (data == NULL)
3266 goto out;
3267
3268 status = nfs4_do_create(dir, dentry, data);
3269
3270 nfs4_free_createdata(data);
3271out:
1da177e4
LT		 3272 return status;
3273}
3274
3275static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3276 struct iattr *sattr)
3277{
3278 struct nfs4_exception exception = { };
3279 int err;
a8a5da99
AK		 3280
3281 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3282 do {
3283 err = nfs4_handle_exception(NFS_SERVER(dir),
3284 _nfs4_proc_mkdir(dir, dentry, sattr),
3285 &exception);
3286 } while (exception.retry);
3287 return err;
3288}
3289
3290static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3291 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3292{
3293 struct inode *dir = dentry->d_inode;
3294 struct nfs4_readdir_arg args = {
3295 .fh = NFS_FH(dir),
56e4ebf8 3296 .pages = pages,
1da177e4
LT		 3297 .pgbase = 0,
3298 .count = count,
96d25e53 3299 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3300 .plus = plus,
1da177e4
LT		 3301 };
3302 struct nfs4_readdir_res res;
3303 struct rpc_message msg = {
3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3305 .rpc_argp = &args,
3306 .rpc_resp = &res,
3307 .rpc_cred = cred,
3308 };
3309 int status;
3310
3110ff80 3311 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3312 dentry->d_parent->d_name.name,
3313 dentry->d_name.name,
3314 (unsigned long long)cookie);
c3f52af3 3315 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3316 res.pgbase = args.pgbase;
7c513058 3317 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3318 if (status >= 0) {
c3f52af3 3319 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3320 status += args.pgbase;
3321 }
c4812998
TM		 3322
3323 nfs_invalidate_atime(dir);
3324
3110ff80 3325 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3326 return status;
3327}
3328
3329static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3330 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3331{
3332 struct nfs4_exception exception = { };
3333 int err;
3334 do {
3335 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3336 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3337 pages, count, plus),
1da177e4
LT		 3338 &exception);
3339 } while (exception.retry);
3340 return err;
3341}
3342
3343static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3344 struct iattr *sattr, dev_t rdev)
3345{
57dc9a57
TM		 3346 struct nfs4_createdata *data;
3347 int mode = sattr->ia_mode;
3348 int status = -ENOMEM;
1da177e4 3349
57dc9a57
TM		 3350 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3351 if (data == NULL)
3352 goto out;
3353
1da177e4 3354 if (S_ISFIFO(mode))
57dc9a57 3355 data->arg.ftype = NF4FIFO;
1da177e4 3356 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3357 data->arg.ftype = NF4BLK;
3358 data->arg.u.device.specdata1 = MAJOR(rdev);
3359 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3360 }
3361 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3362 data->arg.ftype = NF4CHR;
3363 data->arg.u.device.specdata1 = MAJOR(rdev);
3364 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3365 } else if (!S_ISSOCK(mode)) {
3366 status = -EINVAL;
3367 goto out_free;
1da177e4 3368 }
1da177e4 3369
57dc9a57 3370 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3371out_free:
57dc9a57
TM		 3372 nfs4_free_createdata(data);
3373out:
1da177e4
LT		 3374 return status;
3375}
3376
3377static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3378 struct iattr *sattr, dev_t rdev)
3379{
3380 struct nfs4_exception exception = { };
3381 int err;
a8a5da99
AK		 3382
3383 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3384 do {
3385 err = nfs4_handle_exception(NFS_SERVER(dir),
3386 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3387 &exception);
3388 } while (exception.retry);
3389 return err;
3390}
3391
3392static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3393 struct nfs_fsstat *fsstat)
3394{
3395 struct nfs4_statfs_arg args = {
3396 .fh = fhandle,
3397 .bitmask = server->attr_bitmask,
3398 };
24ad148a
BH		 3399 struct nfs4_statfs_res res = {
3400 .fsstat = fsstat,
3401 };
1da177e4
LT		 3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3404 .rpc_argp = &args,
24ad148a 3405 .rpc_resp = &res,
1da177e4
LT		 3406 };
3407
0e574af1 3408 nfs_fattr_init(fsstat->fattr);
7c513058 3409 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3410}
3411
3412static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3413{
3414 struct nfs4_exception exception = { };
3415 int err;
3416 do {
3417 err = nfs4_handle_exception(server,
3418 _nfs4_proc_statfs(server, fhandle, fsstat),
3419 &exception);
3420 } while (exception.retry);
3421 return err;
3422}
3423
3424static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3425 struct nfs_fsinfo *fsinfo)
3426{
3427 struct nfs4_fsinfo_arg args = {
3428 .fh = fhandle,
3429 .bitmask = server->attr_bitmask,
3430 };
3dda5e43
BH		 3431 struct nfs4_fsinfo_res res = {
3432 .fsinfo = fsinfo,
3433 };
1da177e4
LT		 3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3436 .rpc_argp = &args,
3dda5e43 3437 .rpc_resp = &res,
1da177e4
LT		 3438 };
3439
7c513058 3440 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3441}
3442
3443static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3444{
3445 struct nfs4_exception exception = { };
3446 int err;
3447
3448 do {
3449 err = nfs4_handle_exception(server,
3450 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3451 &exception);
3452 } while (exception.retry);
3453 return err;
3454}
3455
3456static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3457{
e38eb650
BS		 3458 int error;
3459
0e574af1 3460 nfs_fattr_init(fsinfo->fattr);
e38eb650 3461 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3462 if (error == 0) {
3463 /* block layout checks this! */
3464 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3465 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3466 }
e38eb650
BS		 3467
3468 return error;
1da177e4
LT		 3469}
3470
3471static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3472 struct nfs_pathconf *pathconf)
3473{
3474 struct nfs4_pathconf_arg args = {
3475 .fh = fhandle,
3476 .bitmask = server->attr_bitmask,
3477 };
d45b2989
BH		 3478 struct nfs4_pathconf_res res = {
3479 .pathconf = pathconf,
3480 };
1da177e4
LT		 3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3483 .rpc_argp = &args,
d45b2989 3484 .rpc_resp = &res,
1da177e4
LT		 3485 };
3486
3487 /* None of the pathconf attributes are mandatory to implement */
3488 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3489 memset(pathconf, 0, sizeof(*pathconf));
3490 return 0;
3491 }
3492
0e574af1 3493 nfs_fattr_init(pathconf->fattr);
7c513058 3494 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3495}
3496
3497static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3498 struct nfs_pathconf *pathconf)
3499{
3500 struct nfs4_exception exception = { };
3501 int err;
3502
3503 do {
3504 err = nfs4_handle_exception(server,
3505 _nfs4_proc_pathconf(server, fhandle, pathconf),
3506 &exception);
3507 } while (exception.retry);
3508 return err;
3509}
3510
5521abfd 3511int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3512 const struct nfs_open_context *ctx,
3513 const struct nfs_lock_context *l_ctx,
3514 fmode_t fmode)
3515{
3516 const struct nfs_lockowner *lockowner = NULL;
3517
3518 if (l_ctx != NULL)
3519 lockowner = &l_ctx->lockowner;
5521abfd 3520 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3521}
3522EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3523
5521abfd
TM		 3524static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3525 const struct nfs_open_context *ctx,
3526 const struct nfs_lock_context *l_ctx,
3527 fmode_t fmode)
3528{
3529 nfs4_stateid current_stateid;
3530
3531 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3532 return false;
3533 return nfs4_stateid_match(stateid, &current_stateid);
3534}
3535
3536static bool nfs4_error_stateid_expired(int err)
3537{
3538 switch (err) {
3539 case -NFS4ERR_DELEG_REVOKED:
3540 case -NFS4ERR_ADMIN_REVOKED:
3541 case -NFS4ERR_BAD_STATEID:
3542 case -NFS4ERR_STALE_STATEID:
3543 case -NFS4ERR_OLD_STATEID:
3544 case -NFS4ERR_OPENMODE:
3545 case -NFS4ERR_EXPIRED:
3546 return true;
3547 }
3548 return false;
3549}
3550
d20581aa
BH		 3551void __nfs4_read_done_cb(struct nfs_read_data *data)
3552{
cd841605 3553 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3554}
3555
cbdabc7f 3556static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3557{
cd841605 3558 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3559
9e33bed5 3560 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3561 rpc_restart_call_prepare(task);
ec06c096 3562 return -EAGAIN;
1da177e4 3563 }
8850df99 3564
d20581aa 3565 __nfs4_read_done_cb(data);
1da177e4 3566 if (task->tk_status > 0)
ec06c096
TM		 3567 renew_lease(server, data->timestamp);
3568 return 0;
1da177e4
LT		 3569}
3570
5521abfd
TM		 3571static bool nfs4_read_stateid_changed(struct rpc_task *task,
3572 struct nfs_readargs *args)
3573{
3574
3575 if (!nfs4_error_stateid_expired(task->tk_status) ||
3576 nfs4_stateid_is_current(&args->stateid,
3577 args->context,
3578 args->lock_context,
3579 FMODE_READ))
3580 return false;
3581 rpc_restart_call_prepare(task);
3582 return true;
3583}
3584
cbdabc7f
AA		 3585static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3586{
3587
3588 dprintk("--> %s\n", __func__);
3589
3590 if (!nfs4_sequence_done(task, &data->res.seq_res))
3591 return -EAGAIN;
5521abfd
TM		 3592 if (nfs4_read_stateid_changed(task, &data->args))
3593 return -EAGAIN;
d20581aa
BH		 3594 return data->read_done_cb ? data->read_done_cb(task, data) :
3595 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3596}
3597
bdc7f021 3598static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3599{
1da177e4 3600 data->timestamp = jiffies;
cbdabc7f 3601 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3603 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3604}
3605
ea7c3303
BS		 3606static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3607{
9b206149 3608 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3609 &data->args.seq_args,
3610 &data->res.seq_res,
9b206149
TM		 3611 task))
3612 return;
3613 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3614 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3615}
3616
b029bc9b 3617static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3618{
cd841605 3619 struct inode *inode = data->header->inode;
1da177e4 3620
9e33bed5 3621 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3622 rpc_restart_call_prepare(task);
788e7a89 3623 return -EAGAIN;
1da177e4 3624 }
4f9838c7 3625 if (task->tk_status >= 0) {
1da177e4 3626 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3627 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3628 }
788e7a89 3629 return 0;
1da177e4
LT		 3630}
3631
5521abfd
TM		 3632static bool nfs4_write_stateid_changed(struct rpc_task *task,
3633 struct nfs_writeargs *args)
3634{
3635
3636 if (!nfs4_error_stateid_expired(task->tk_status) ||
3637 nfs4_stateid_is_current(&args->stateid,
3638 args->context,
3639 args->lock_context,
3640 FMODE_WRITE))
3641 return false;
3642 rpc_restart_call_prepare(task);
3643 return true;
3644}
3645
b029bc9b
FI		 3646static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3647{
3648 if (!nfs4_sequence_done(task, &data->res.seq_res))
3649 return -EAGAIN;
5521abfd
TM		 3650 if (nfs4_write_stateid_changed(task, &data->args))
3651 return -EAGAIN;
d20581aa
BH		 3652 return data->write_done_cb ? data->write_done_cb(task, data) :
3653 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3654}
3655
5a37f851
TM		 3656static
3657bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3658{
5a37f851
TM		 3659 const struct nfs_pgio_header *hdr = data->header;
3660
3661 /* Don't request attributes for pNFS or O_DIRECT writes */
3662 if (data->ds_clp != NULL || hdr->dreq != NULL)
3663 return false;
3664 /* Otherwise, request attributes if and only if we don't hold
3665 * a delegation
3666 */
011e2a7f 3667 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3668}
a69aef14 3669
bdc7f021 3670static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3671{
cd841605 3672 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3673
5a37f851 3674 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3675 data->args.bitmask = NULL;
3676 data->res.fattr = NULL;
3677 } else
3678 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3679
b029bc9b
FI		 3680 if (!data->write_done_cb)
3681 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3682 data->res.server = server;
1da177e4
LT		 3683 data->timestamp = jiffies;
3684
bdc7f021 3685 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3686 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3687}
3688
c6cb80d0
BS		 3689static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3690{
9b206149 3691 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3692 &data->args.seq_args,
3693 &data->res.seq_res,
9b206149
TM		 3694 task))
3695 return;
3696 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3697 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3698}
3699
0b7c0153 3700static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3701{
d9afbd1b
TM		 3702 nfs4_setup_sequence(NFS_SERVER(data->inode),
3703 &data->args.seq_args,
3704 &data->res.seq_res,
3705 task);
1da177e4
LT		 3706}
3707
0b7c0153 3708static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3709{
1da177e4 3710 struct inode *inode = data->inode;
14516c3a 3711
9e33bed5 3712 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3713 rpc_restart_call_prepare(task);
788e7a89 3714 return -EAGAIN;
1da177e4 3715 }
788e7a89 3716 return 0;
1da177e4
LT		 3717}
3718
0b7c0153 3719static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3720{
3721 if (!nfs4_sequence_done(task, &data->res.seq_res))
3722 return -EAGAIN;
0b7c0153 3723 return data->commit_done_cb(task, data);
5f452431
FI		 3724}
3725
0b7c0153 3726static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3727{
788e7a89 3728 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3729
0b7c0153
FI		 3730 if (data->commit_done_cb == NULL)
3731 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3732 data->res.server = server;
bdc7f021 3733 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3734 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3735}
3736
9bc4e3ca
CL		 3737struct nfs4_renewdata {
3738 struct nfs_client *client;
3739 unsigned long timestamp;
3740};
3741
1da177e4
LT		 3742/*
3743 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3744 * standalone procedure for queueing an asynchronous RENEW.
3745 */
9bc4e3ca 3746static void nfs4_renew_release(void *calldata)
dc96aef9 3747{
9bc4e3ca
CL		 3748 struct nfs4_renewdata *data = calldata;
3749 struct nfs_client *clp = data->client;
dc96aef9 3750
0851de06
AB		 3751 if (atomic_read(&clp->cl_count) > 1)
3752 nfs4_schedule_state_renewal(clp);
3753 nfs_put_client(clp);
9bc4e3ca 3754 kfree(data);
dc96aef9
AB		 3755}
3756
9bc4e3ca 3757static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3758{
9bc4e3ca
CL		 3759 struct nfs4_renewdata *data = calldata;
3760 struct nfs_client *clp = data->client;
3761 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3762
3763 if (task->tk_status < 0) {
95baa25c 3764 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3765 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3766 return;
3767 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3768 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3769 return;
3770 }
3771 nfs4_schedule_path_down_recovery(clp);
1da177e4 3772 }
452e9352 3773 do_renew_lease(clp, timestamp);
1da177e4
LT		 3774}
3775
963d8fe5
TM		 3776static const struct rpc_call_ops nfs4_renew_ops = {
3777 .rpc_call_done = nfs4_renew_done,
dc96aef9 3778 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3779};
3780
2f60ea6b 3781static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3782{
3783 struct rpc_message msg = {
3784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3785 .rpc_argp = clp,
b4454fe1 3786 .rpc_cred = cred,
1da177e4 3787 };
9bc4e3ca 3788 struct nfs4_renewdata *data;
1da177e4 3789
2f60ea6b
TM		 3790 if (renew_flags == 0)
3791 return 0;
0851de06
AB		 3792 if (!atomic_inc_not_zero(&clp->cl_count))
3793 return -EIO;
b569ad34 3794 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3795 if (data == NULL)
3796 return -ENOMEM;
3797 data->client = clp;
3798 data->timestamp = jiffies;
1da177e4 3799 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3800 &nfs4_renew_ops, data);
1da177e4
LT		 3801}
3802
8534d4ec 3803static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3804{
3805 struct rpc_message msg = {
3806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3807 .rpc_argp = clp,
b4454fe1 3808 .rpc_cred = cred,
1da177e4
LT		 3809 };
3810 unsigned long now = jiffies;
3811 int status;
3812
3813 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3814 if (status < 0)
3815 return status;
452e9352 3816 do_renew_lease(clp, now);
1da177e4
LT		 3817 return 0;
3818}
3819
aa1870af
BF		 3820static inline int nfs4_server_supports_acls(struct nfs_server *server)
3821{
3822 return (server->caps & NFS_CAP_ACLS)
3823 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3824 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3825}
3826
21f498c2
TM		 3827/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3828 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3829 * the stack.
3830 */
21f498c2 3831#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3832
e9e3d724
NH		 3833static int buf_to_pages_noslab(const void *buf, size_t buflen,
3834 struct page **pages, unsigned int *pgbase)
3835{
3836 struct page *newpage, **spages;
3837 int rc = 0;
3838 size_t len;
3839 spages = pages;
3840
3841 do {
21f498c2 3842 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3843 newpage = alloc_page(GFP_KERNEL);
3844
3845 if (newpage == NULL)
3846 goto unwind;
3847 memcpy(page_address(newpage), buf, len);
3848 buf += len;
3849 buflen -= len;
3850 *pages++ = newpage;
3851 rc++;
3852 } while (buflen != 0);
3853
3854 return rc;
3855
3856unwind:
3857 for(; rc > 0; rc--)
3858 __free_page(spages[rc-1]);
3859 return -ENOMEM;
3860}
3861
e50a1c2e
BF		 3862struct nfs4_cached_acl {
3863 int cached;
3864 size_t len;
3e9d4154 3865 char data[0];
e50a1c2e
BF		 3866};
3867
3868static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3869{
3870 struct nfs_inode *nfsi = NFS_I(inode);
3871
3872 spin_lock(&inode->i_lock);
3873 kfree(nfsi->nfs4_acl);
3874 nfsi->nfs4_acl = acl;
3875 spin_unlock(&inode->i_lock);
3876}
3877
3878static void nfs4_zap_acl_attr(struct inode *inode)
3879{
3880 nfs4_set_cached_acl(inode, NULL);
3881}
3882
3883static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3884{
3885 struct nfs_inode *nfsi = NFS_I(inode);
3886 struct nfs4_cached_acl *acl;
3887 int ret = -ENOENT;
3888
3889 spin_lock(&inode->i_lock);
3890 acl = nfsi->nfs4_acl;
3891 if (acl == NULL)
3892 goto out;
3893 if (buf == NULL) /* user is just asking for length */
3894 goto out_len;
3895 if (acl->cached == 0)
3896 goto out;
3897 ret = -ERANGE; /* see getxattr(2) man page */
3898 if (acl->len > buflen)
3899 goto out;
3900 memcpy(buf, acl->data, acl->len);
3901out_len:
3902 ret = acl->len;
3903out:
3904 spin_unlock(&inode->i_lock);
3905 return ret;
3906}
3907
5794d21e 3908static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3909{
3910 struct nfs4_cached_acl *acl;
b291f1b1 3911 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3912
1f1ea6c2 3913 if (buflen <= PAGE_SIZE) {
b291f1b1 3914 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3915 if (acl == NULL)
3916 goto out;
3917 acl->cached = 1;
5794d21e 3918 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3919 } else {
3920 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3921 if (acl == NULL)
3922 goto out;
3923 acl->cached = 0;
3924 }
3925 acl->len = acl_len;
3926out:
3927 nfs4_set_cached_acl(inode, acl);
3928}
3929
bf118a34
AA		 3930/*
3931 * The getxattr API returns the required buffer length when called with a
3932 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3933 * the required buf. On a NULL buf, we send a page of data to the server
3934 * guessing that the ACL request can be serviced by a page. If so, we cache
3935 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3936 * the cache. If not so, we throw away the page, and cache the required
3937 * length. The next getxattr call will then produce another round trip to
3938 * the server, this time with the input buf of the required size.
3939 */
16b4289c 3940static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3941{
bf118a34 3942 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3943 struct nfs_getaclargs args = {
3944 .fh = NFS_FH(inode),
3945 .acl_pages = pages,
3946 .acl_len = buflen,
3947 };
663c79b3
BH		 3948 struct nfs_getaclres res = {
3949 .acl_len = buflen,
3950 };
aa1870af
BF		 3951 struct rpc_message msg = {
3952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3953 .rpc_argp = &args,
663c79b3 3954 .rpc_resp = &res,
aa1870af 3955 };
21f498c2
TM		 3956 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3957 int ret = -ENOMEM, i;
aa1870af 3958
bf118a34
AA		 3959 /* As long as we're doing a round trip to the server anyway,
3960 * let's be prepared for a page of acl data. */
3961 if (npages == 0)
3962 npages = 1;
21f498c2
TM		 3963 if (npages > ARRAY_SIZE(pages))
3964 return -ERANGE;
5a006899 3965
bf118a34
AA		 3966 for (i = 0; i < npages; i++) {
3967 pages[i] = alloc_page(GFP_KERNEL);
3968 if (!pages[i])
3969 goto out_free;
e50a1c2e 3970 }
5a006899
SP		 3971
3972 /* for decoding across pages */
3973 res.acl_scratch = alloc_page(GFP_KERNEL);
3974 if (!res.acl_scratch)
3975 goto out_free;
3976
bf118a34
AA		 3977 args.acl_len = npages * PAGE_SIZE;
3978 args.acl_pgbase = 0;
5a006899 3979
de040bec 3980 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3981 __func__, buf, buflen, npages, args.acl_len);
3982 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3983 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3984 if (ret)
3985 goto out_free;
bf118a34 3986
1f1ea6c2
TM		 3987 /* Handle the case where the passed-in buffer is too short */
3988 if (res.acl_flags & NFS4_ACL_TRUNC) {
3989 /* Did the user only issue a request for the acl length? */
3990 if (buf == NULL)
3991 goto out_ok;
e50a1c2e 3992 ret = -ERANGE;
1f1ea6c2 3993 goto out_free;
e50a1c2e 3994 }
1f1ea6c2 3995 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3996 if (buf) {
3997 if (res.acl_len > buflen) {
3998 ret = -ERANGE;
3999 goto out_free;
4000 }
1f1ea6c2 4001 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4002 }
1f1ea6c2
TM		 4003out_ok:
4004 ret = res.acl_len;
e50a1c2e 4005out_free:
bf118a34
AA		 4006 for (i = 0; i < npages; i++)
4007 if (pages[i])
4008 __free_page(pages[i]);
331818f1
TM		 4009 if (res.acl_scratch)
4010 __free_page(res.acl_scratch);
aa1870af
BF		 4011 return ret;
4012}
4013
16b4289c
TM		 4014static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4015{
4016 struct nfs4_exception exception = { };
4017 ssize_t ret;
4018 do {
4019 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4020 if (ret >= 0)
4021 break;
4022 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4023 } while (exception.retry);
4024 return ret;
4025}
4026
e50a1c2e
BF		 4027static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4028{
4029 struct nfs_server *server = NFS_SERVER(inode);
4030 int ret;
4031
4032 if (!nfs4_server_supports_acls(server))
4033 return -EOPNOTSUPP;
4034 ret = nfs_revalidate_inode(server, inode);
4035 if (ret < 0)
4036 return ret;
08a22b39
AK		 4037 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4038 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4039 ret = nfs4_read_cached_acl(inode, buf, buflen);
4040 if (ret != -ENOENT)
bf118a34
AA		 4041 /* -ENOENT is returned if there is no ACL or if there is an ACL
4042 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4043 return ret;
4044 return nfs4_get_acl_uncached(inode, buf, buflen);
4045}
4046
16b4289c 4047static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4048{
4049 struct nfs_server *server = NFS_SERVER(inode);
4050 struct page *pages[NFS4ACL_MAXPAGES];
4051 struct nfs_setaclargs arg = {
4052 .fh = NFS_FH(inode),
4053 .acl_pages = pages,
4054 .acl_len = buflen,
4055 };
73c403a9 4056 struct nfs_setaclres res;
4b580ee3
BF		 4057 struct rpc_message msg = {
4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4059 .rpc_argp = &arg,
73c403a9 4060 .rpc_resp = &res,
4b580ee3 4061 };
21f498c2 4062 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4063 int ret, i;
4b580ee3
BF		 4064
4065 if (!nfs4_server_supports_acls(server))
4066 return -EOPNOTSUPP;
21f498c2
TM		 4067 if (npages > ARRAY_SIZE(pages))
4068 return -ERANGE;
e9e3d724
NH		 4069 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4070 if (i < 0)
4071 return i;
57ec14c5 4072 nfs4_inode_return_delegation(inode);
7c513058 4073 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4074
4075 /*
4076 * Free each page after tx, so the only ref left is
4077 * held by the network stack
4078 */
4079 for (; i > 0; i--)
4080 put_page(pages[i-1]);
4081
08a22b39
AK		 4082 /*
4083 * Acl update can result in inode attribute update.
4084 * so mark the attribute cache invalid.
4085 */
4086 spin_lock(&inode->i_lock);
4087 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4088 spin_unlock(&inode->i_lock);
f41f7418
TM		 4089 nfs_access_zap_cache(inode);
4090 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4091 return ret;
4092}
4093
16b4289c
TM		 4094static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4095{
4096 struct nfs4_exception exception = { };
4097 int err;
4098 do {
4099 err = nfs4_handle_exception(NFS_SERVER(inode),
4100 __nfs4_proc_set_acl(inode, buf, buflen),
4101 &exception);
4102 } while (exception.retry);
4103 return err;
4104}
4105
1da177e4 4106static int
aa5190d0 4107nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4108{
aa5190d0
TM		 4109 struct nfs_client *clp = server->nfs_client;
4110
4111 if (task->tk_status >= 0)
1da177e4
LT		 4112 return 0;
4113 switch(task->tk_status) {
a1d0b5ee 4114 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4115 case -NFS4ERR_ADMIN_REVOKED:
4116 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4117 if (state == NULL)
4118 break;
4119 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4120 case -NFS4ERR_OPENMODE:
4121 if (state == NULL)
4122 break;
5d422301
TM		 4123 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4124 goto stateid_invalid;
0400a6b0 4125 goto wait_on_recovery;
0ced63d1 4126 case -NFS4ERR_EXPIRED:
5d422301
TM		 4127 if (state != NULL) {
4128 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4129 goto stateid_invalid;
4130 }
1da177e4 4131 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4132 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4133 nfs4_schedule_lease_recovery(clp);
4134 goto wait_on_recovery;
4745e315
AA		 4135#if defined(CONFIG_NFS_V4_1)
4136 case -NFS4ERR_BADSESSION:
4137 case -NFS4ERR_BADSLOT:
4138 case -NFS4ERR_BAD_HIGH_SLOT:
4139 case -NFS4ERR_DEADSESSION:
4140 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4141 case -NFS4ERR_SEQ_FALSE_RETRY:
4142 case -NFS4ERR_SEQ_MISORDERED:
4143 dprintk("%s ERROR %d, Reset session\n", __func__,
4144 task->tk_status);
9f594791 4145 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4146 task->tk_status = 0;
4147 return -EAGAIN;
4148#endif /* CONFIG_NFS_V4_1 */
1da177e4 4149 case -NFS4ERR_DELAY:
aa5190d0 4150 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4151 case -NFS4ERR_GRACE:
1da177e4
LT		 4152 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4153 task->tk_status = 0;
4154 return -EAGAIN;
a8a4ae3a 4155 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4156 case -NFS4ERR_OLD_STATEID:
4157 task->tk_status = 0;
4158 return -EAGAIN;
4159 }
4160 task->tk_status = nfs4_map_errors(task->tk_status);
4161 return 0;
5d422301
TM		 4162stateid_invalid:
4163 task->tk_status = -EIO;
4164 return 0;
0400a6b0 4165wait_on_recovery:
a2c0b9e2 4166 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4167 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4168 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4169 task->tk_status = 0;
4170 return -EAGAIN;
1da177e4
LT		 4171}
4172
f092075d
CL		 4173static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4174 nfs4_verifier *bootverf)
cd93710e
CL		 4175{
4176 __be32 verf[2];
4177
2c820d9a
CL		 4178 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4179 /* An impossible timestamp guarantees this value
4180 * will never match a generated boot time. */
4181 verf[0] = 0;
4182 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4183 } else {
f092075d
CL		 4184 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4185 verf[0] = (__be32)nn->boot_time.tv_sec;
4186 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4187 }
cd93710e
CL		 4188 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4189}
4190
e984a55a
CL		 4191static unsigned int
4192nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4193 char *buf, size_t len)
4194{
4195 unsigned int result;
4196
4197 rcu_read_lock();
4198 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4199 clp->cl_ipaddr,
4200 rpc_peeraddr2str(clp->cl_rpcclient,
4201 RPC_DISPLAY_ADDR),
4202 rpc_peeraddr2str(clp->cl_rpcclient,
4203 RPC_DISPLAY_PROTO));
4204 rcu_read_unlock();
4205 return result;
4206}
4207
4208static unsigned int
4209nfs4_init_uniform_client_string(const struct nfs_client *clp,
4210 char *buf, size_t len)
4211{
6f2ea7f2
CL		 4212 char *nodename = clp->cl_rpcclient->cl_nodename;
4213
4214 if (nfs4_client_id_uniquifier[0] != '\0')
4215 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4216 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4217 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4218 nodename);
e984a55a
CL		 4219}
4220
6bbb4ae8
CL		 4221/**
4222 * nfs4_proc_setclientid - Negotiate client ID
4223 * @clp: state data structure
4224 * @program: RPC program for NFSv4 callback service
4225 * @port: IP port number for NFS4 callback service
4226 * @cred: RPC credential to use for this call
4227 * @res: where to place the result
4228 *
4229 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4230 */
bb8b27e5
TM		 4231int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4232 unsigned short port, struct rpc_cred *cred,
4233 struct nfs4_setclientid_res *res)
1da177e4
LT		 4234{
4235 nfs4_verifier sc_verifier;
4236 struct nfs4_setclientid setclientid = {
4237 .sc_verifier = &sc_verifier,
4238 .sc_prog = program,
f4eecd5d 4239 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4240 };
4241 struct rpc_message msg = {
4242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4243 .rpc_argp = &setclientid,
bb8b27e5 4244 .rpc_resp = res,
286d7d6a 4245 .rpc_cred = cred,
1da177e4 4246 };
6bbb4ae8 4247 int status;
1da177e4 4248
de734831 4249 /* nfs_client_id4 */
f092075d 4250 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4251 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4252 setclientid.sc_name_len =
4253 nfs4_init_uniform_client_string(clp,
4254 setclientid.sc_name,
4255 sizeof(setclientid.sc_name));
4256 else
4257 setclientid.sc_name_len =
4258 nfs4_init_nonuniform_client_string(clp,
4259 setclientid.sc_name,
4260 sizeof(setclientid.sc_name));
de734831 4261 /* cb_client4 */
e984a55a 4262 rcu_read_lock();
de734831 4263 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4264 sizeof(setclientid.sc_netid),
4265 rpc_peeraddr2str(clp->cl_rpcclient,
4266 RPC_DISPLAY_NETID));
de734831
CL		 4267 rcu_read_unlock();
4268 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4269 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4270 clp->cl_ipaddr, port >> 8, port & 255);
4271
6bbb4ae8
CL		 4272 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4273 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4274 setclientid.sc_name_len, setclientid.sc_name);
4275 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4276 dprintk("NFS reply setclientid: %d\n", status);
4277 return status;
1da177e4
LT		 4278}
4279
6bbb4ae8
CL		 4280/**
4281 * nfs4_proc_setclientid_confirm - Confirm client ID
4282 * @clp: state data structure
4283 * @res: result of a previous SETCLIENTID
4284 * @cred: RPC credential to use for this call
4285 *
4286 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4287 */
fd954ae1 4288int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4289 struct nfs4_setclientid_res *arg,
4290 struct rpc_cred *cred)
1da177e4
LT		 4291{
4292 struct nfs_fsinfo fsinfo;
4293 struct rpc_message msg = {
4294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4295 .rpc_argp = arg,
1da177e4 4296 .rpc_resp = &fsinfo,
286d7d6a 4297 .rpc_cred = cred,
1da177e4
LT		 4298 };
4299 unsigned long now;
4300 int status;
4301
6bbb4ae8
CL		 4302 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4303 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4304 clp->cl_clientid);
1da177e4 4305 now = jiffies;
1bd714f2 4306 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4307 if (status == 0) {
4308 spin_lock(&clp->cl_lock);
4309 clp->cl_lease_time = fsinfo.lease_time * HZ;
4310 clp->cl_last_renewal = now;
4311 spin_unlock(&clp->cl_lock);
4312 }
6bbb4ae8 4313 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4314 return status;
4315}
4316
fe650407
TM		 4317struct nfs4_delegreturndata {
4318 struct nfs4_delegreturnargs args;
fa178f29 4319 struct nfs4_delegreturnres res;
fe650407
TM		 4320 struct nfs_fh fh;
4321 nfs4_stateid stateid;
26e976a8 4322 unsigned long timestamp;
fa178f29 4323 struct nfs_fattr fattr;
fe650407
TM		 4324 int rpc_status;
4325};
4326
fe650407
TM		 4327static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4328{
4329 struct nfs4_delegreturndata *data = calldata;
938e1010 4330
14516c3a
TM		 4331 if (!nfs4_sequence_done(task, &data->res.seq_res))
4332 return;
938e1010 4333
79708861
RL		 4334 switch (task->tk_status) {
4335 case -NFS4ERR_STALE_STATEID:
4336 case -NFS4ERR_EXPIRED:
4337 case 0:
fa178f29 4338 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4339 break;
4340 default:
4341 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4342 -EAGAIN) {
d00c5d43 4343 rpc_restart_call_prepare(task);
79708861
RL		 4344 return;
4345 }
4346 }
4347 data->rpc_status = task->tk_status;
fe650407
TM		 4348}
4349
4350static void nfs4_delegreturn_release(void *calldata)
4351{
fe650407
TM		 4352 kfree(calldata);
4353}
4354
938e1010
AA		 4355#if defined(CONFIG_NFS_V4_1)
4356static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4357{
4358 struct nfs4_delegreturndata *d_data;
4359
4360 d_data = (struct nfs4_delegreturndata *)data;
4361
d9afbd1b
TM		 4362 nfs4_setup_sequence(d_data->res.server,
4363 &d_data->args.seq_args,
4364 &d_data->res.seq_res,
4365 task);
938e1010
AA		 4366}
4367#endif /* CONFIG_NFS_V4_1 */
4368
c8d149f3 4369static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4370#if defined(CONFIG_NFS_V4_1)
4371 .rpc_call_prepare = nfs4_delegreturn_prepare,
4372#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4373 .rpc_call_done = nfs4_delegreturn_done,
4374 .rpc_release = nfs4_delegreturn_release,
4375};
4376
e6f81075 4377static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4378{
4379 struct nfs4_delegreturndata *data;
fa178f29 4380 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4381 struct rpc_task *task;
5138fde0
TM		 4382 struct rpc_message msg = {
4383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4384 .rpc_cred = cred,
4385 };
c970aa85
TM		 4386 struct rpc_task_setup task_setup_data = {
4387 .rpc_client = server->client,
5138fde0 4388 .rpc_message = &msg,
c970aa85
TM		 4389 .callback_ops = &nfs4_delegreturn_ops,
4390 .flags = RPC_TASK_ASYNC,
4391 };
e6f81075 4392 int status = 0;
fe650407 4393
8535b2be 4394 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4395 if (data == NULL)
4396 return -ENOMEM;
9d12b216 4397 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4398 data->args.fhandle = &data->fh;
4399 data->args.stateid = &data->stateid;
9e907fec 4400 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4401 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4402 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4403 data->res.fattr = &data->fattr;
4404 data->res.server = server;
5138fde0 4405 nfs_fattr_init(data->res.fattr);
26e976a8 4406 data->timestamp = jiffies;
fe650407
TM		 4407 data->rpc_status = 0;
4408
c970aa85 4409 task_setup_data.callback_data = data;
1174dd1f
TM		 4410 msg.rpc_argp = &data->args;
4411 msg.rpc_resp = &data->res;
c970aa85 4412 task = rpc_run_task(&task_setup_data);
7a1218a2 4413 if (IS_ERR(task))
fe650407 4414 return PTR_ERR(task);
e6f81075
TM		 4415 if (!issync)
4416 goto out;
fe650407 4417 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4418 if (status != 0)
4419 goto out;
4420 status = data->rpc_status;
e144cbcc
TM		 4421 if (status == 0)
4422 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4423 else
4424 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4425out:
e6b3c4db 4426 rpc_put_task(task);
fe650407 4427 return status;
1da177e4
LT		 4428}
4429
e6f81075 4430int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4431{
4432 struct nfs_server *server = NFS_SERVER(inode);
4433 struct nfs4_exception exception = { };
4434 int err;
4435 do {
e6f81075 4436 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4437 switch (err) {
4438 case -NFS4ERR_STALE_STATEID:
4439 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4440 case 0:
4441 return 0;
4442 }
4443 err = nfs4_handle_exception(server, err, &exception);
4444 } while (exception.retry);
4445 return err;
4446}
4447
4448#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4449#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4450
4451/*
4452 * sleep, with exponential backoff, and retry the LOCK operation.
4453 */
4454static unsigned long
4455nfs4_set_lock_task_retry(unsigned long timeout)
4456{
d310310c 4457 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4458 timeout <<= 1;
4459 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4460 return NFS4_LOCK_MAXTIMEOUT;
4461 return timeout;
4462}
4463
1da177e4
LT		 4464static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4465{
4466 struct inode *inode = state->inode;
4467 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4468 struct nfs_client *clp = server->nfs_client;
911d1aaf 4469 struct nfs_lockt_args arg = {
1da177e4 4470 .fh = NFS_FH(inode),
911d1aaf 4471 .fl = request,
1da177e4 4472 };
911d1aaf
TM		 4473 struct nfs_lockt_res res = {
4474 .denied = request,
1da177e4
LT		 4475 };
4476 struct rpc_message msg = {
4477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4478 .rpc_argp = &arg,
4479 .rpc_resp = &res,
4480 .rpc_cred = state->owner->so_cred,
4481 };
1da177e4
LT		 4482 struct nfs4_lock_state *lsp;
4483 int status;
4484
911d1aaf 4485 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4486 status = nfs4_set_lock_state(state, request);
4487 if (status != 0)
4488 goto out;
4489 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4490 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4491 arg.lock_owner.s_dev = server->s_dev;
7c513058 4492 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4493 switch (status) {
4494 case 0:
4495 request->fl_type = F_UNLCK;
4496 break;
4497 case -NFS4ERR_DENIED:
4498 status = 0;
1da177e4 4499 }
70cc6487 4500 request->fl_ops->fl_release_private(request);
8d0a8a9d 4501out:
1da177e4
LT		 4502 return status;
4503}
4504
4505static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4506{
4507 struct nfs4_exception exception = { };
4508 int err;
4509
4510 do {
4511 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4512 _nfs4_proc_getlk(state, cmd, request),
4513 &exception);
4514 } while (exception.retry);
4515 return err;
4516}
4517
4518static int do_vfs_lock(struct file *file, struct file_lock *fl)
4519{
4520 int res = 0;
4521 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4522 case FL_POSIX:
4523 res = posix_lock_file_wait(file, fl);
4524 break;
4525 case FL_FLOCK:
4526 res = flock_lock_file_wait(file, fl);
4527 break;
4528 default:
4529 BUG();
4530 }
1da177e4
LT		 4531 return res;
4532}
4533
faf5f49c 4534struct nfs4_unlockdata {
911d1aaf
TM		 4535 struct nfs_locku_args arg;
4536 struct nfs_locku_res res;
faf5f49c
TM		 4537 struct nfs4_lock_state *lsp;
4538 struct nfs_open_context *ctx;
911d1aaf
TM		 4539 struct file_lock fl;
4540 const struct nfs_server *server;
26e976a8 4541 unsigned long timestamp;
faf5f49c
TM		 4542};
4543
911d1aaf
TM		 4544static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4545 struct nfs_open_context *ctx,
4546 struct nfs4_lock_state *lsp,
4547 struct nfs_seqid *seqid)
4548{
4549 struct nfs4_unlockdata *p;
4550 struct inode *inode = lsp->ls_state->inode;
4551
8535b2be 4552 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4553 if (p == NULL)
4554 return NULL;
4555 p->arg.fh = NFS_FH(inode);
4556 p->arg.fl = &p->fl;
4557 p->arg.seqid = seqid;
c1d51931 4558 p->res.seqid = seqid;
911d1aaf
TM		 4559 p->arg.stateid = &lsp->ls_stateid;
4560 p->lsp = lsp;
4561 atomic_inc(&lsp->ls_count);
4562 /* Ensure we don't close file until we're done freeing locks! */
4563 p->ctx = get_nfs_open_context(ctx);
4564 memcpy(&p->fl, fl, sizeof(p->fl));
4565 p->server = NFS_SERVER(inode);
4566 return p;
4567}
4568
06f814a3 4569static void nfs4_locku_release_calldata(void *data)
faf5f49c 4570{
963d8fe5 4571 struct nfs4_unlockdata *calldata = data;
911d1aaf 4572 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4573 nfs4_put_lock_state(calldata->lsp);
4574 put_nfs_open_context(calldata->ctx);
4575 kfree(calldata);
faf5f49c
TM		 4576}
4577
963d8fe5 4578static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4579{
963d8fe5 4580 struct nfs4_unlockdata *calldata = data;
faf5f49c 4581
14516c3a
TM		 4582 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4583 return;
faf5f49c
TM		 4584 switch (task->tk_status) {
4585 case 0:
f597c537
TM		 4586 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4587 &calldata->res.stateid);
26e976a8 4588 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4589 break;
9e33bed5
TM		 4590 case -NFS4ERR_BAD_STATEID:
4591 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4592 case -NFS4ERR_STALE_STATEID:
4593 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4594 break;
4595 default:
9e33bed5 4596 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4597 rpc_restart_call_prepare(task);
faf5f49c 4598 }
2b1bc308 4599 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4600}
4601
4ce70ada 4602static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4603{
4ce70ada 4604 struct nfs4_unlockdata *calldata = data;
faf5f49c 4605
911d1aaf 4606 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4607 goto out_wait;
795a88c9 4608 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4609 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4610 goto out_no_action;
faf5f49c 4611 }
26e976a8 4612 calldata->timestamp = jiffies;
035168ab 4613 if (nfs4_setup_sequence(calldata->server,
a893693c 4614 &calldata->arg.seq_args,
2240a9e2
TM		 4615 &calldata->res.seq_res,
4616 task) != 0)
4617 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4618 return;
4619out_no_action:
4620 task->tk_action = NULL;
4621out_wait:
4622 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4623}
4624
963d8fe5 4625static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4626 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4627 .rpc_call_done = nfs4_locku_done,
06f814a3 4628 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4629};
4630
a5d16a4d
TM		 4631static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4632 struct nfs_open_context *ctx,
4633 struct nfs4_lock_state *lsp,
4634 struct nfs_seqid *seqid)
4635{
4636 struct nfs4_unlockdata *data;
5138fde0
TM		 4637 struct rpc_message msg = {
4638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4639 .rpc_cred = ctx->cred,
4640 };
c970aa85
TM		 4641 struct rpc_task_setup task_setup_data = {
4642 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4643 .rpc_message = &msg,
c970aa85 4644 .callback_ops = &nfs4_locku_ops,
101070ca 4645 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4646 .flags = RPC_TASK_ASYNC,
4647 };
a5d16a4d 4648
137d6aca
FF		 4649 /* Ensure this is an unlock - when canceling a lock, the
4650 * canceled lock is passed in, and it won't be an unlock.
4651 */
4652 fl->fl_type = F_UNLCK;
4653
a5d16a4d
TM		 4654 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4655 if (data == NULL) {
4656 nfs_free_seqid(seqid);
4657 return ERR_PTR(-ENOMEM);
4658 }
4659
9d12b216 4660 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4661 msg.rpc_argp = &data->arg;
4662 msg.rpc_resp = &data->res;
c970aa85
TM		 4663 task_setup_data.callback_data = data;
4664 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4665}
4666
faf5f49c
TM		 4667static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4668{
65b62a29
TM		 4669 struct inode *inode = state->inode;
4670 struct nfs4_state_owner *sp = state->owner;
4671 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4672 struct nfs_seqid *seqid;
1da177e4 4673 struct nfs4_lock_state *lsp;
06f814a3
TM		 4674 struct rpc_task *task;
4675 int status = 0;
536ff0f8 4676 unsigned char fl_flags = request->fl_flags;
faf5f49c 4677
8d0a8a9d 4678 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4679 /* Unlock _before_ we do the RPC call */
4680 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4681 /* Exclude nfs_delegation_claim_locks() */
4682 mutex_lock(&sp->so_delegreturn_mutex);
4683 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4684 down_read(&nfsi->rwsem);
4685 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4686 up_read(&nfsi->rwsem);
65b62a29 4687 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4688 goto out;
19e03c57
TM		 4689 }
4690 up_read(&nfsi->rwsem);
65b62a29 4691 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4692 if (status != 0)
9b073574
TM		 4693 goto out;
4694 /* Is this a delegated lock? */
4695 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4696 goto out;
8d0a8a9d 4697 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4698 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4699 status = -ENOMEM;
911d1aaf 4700 if (seqid == NULL)
9b073574 4701 goto out;
cd3758e3 4702 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4703 status = PTR_ERR(task);
4704 if (IS_ERR(task))
9b073574 4705 goto out;
a5d16a4d 4706 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4707 rpc_put_task(task);
9b073574 4708out:
536ff0f8 4709 request->fl_flags = fl_flags;
1da177e4
LT		 4710 return status;
4711}
4712
a5d16a4d
TM		 4713struct nfs4_lockdata {
4714 struct nfs_lock_args arg;
4715 struct nfs_lock_res res;
4716 struct nfs4_lock_state *lsp;
4717 struct nfs_open_context *ctx;
4718 struct file_lock fl;
26e976a8 4719 unsigned long timestamp;
a5d16a4d
TM		 4720 int rpc_status;
4721 int cancelled;
66179efe 4722 struct nfs_server *server;
a5d16a4d
TM		 4723};
4724
4725static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4726 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4727 gfp_t gfp_mask)
1da177e4 4728{
a5d16a4d
TM		 4729 struct nfs4_lockdata *p;
4730 struct inode *inode = lsp->ls_state->inode;
1da177e4 4731 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4732
8535b2be 4733 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4734 if (p == NULL)
4735 return NULL;
4736
4737 p->arg.fh = NFS_FH(inode);
4738 p->arg.fl = &p->fl;
8535b2be 4739 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4740 if (p->arg.open_seqid == NULL)
4741 goto out_free;
8535b2be 4742 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4743 if (p->arg.lock_seqid == NULL)
2f74c0a0 4744 goto out_free_seqid;
a5d16a4d 4745 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4746 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4747 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4748 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4749 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4750 p->lsp = lsp;
66179efe 4751 p->server = server;
a5d16a4d
TM		 4752 atomic_inc(&lsp->ls_count);
4753 p->ctx = get_nfs_open_context(ctx);
4754 memcpy(&p->fl, fl, sizeof(p->fl));
4755 return p;
2f74c0a0
TM		 4756out_free_seqid:
4757 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4758out_free:
4759 kfree(p);
4760 return NULL;
4761}
4762
4763static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4764{
4765 struct nfs4_lockdata *data = calldata;
4766 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4767
3110ff80 4768 dprintk("%s: begin!\n", __func__);
2f74c0a0 4769 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4770 goto out_wait;
a5d16a4d
TM		 4771 /* Do we need to do an open_to_lock_owner? */
4772 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4773 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4774 goto out_release_lock_seqid;
8fe72bac 4775 }
a5d16a4d
TM		 4776 data->arg.open_stateid = &state->stateid;
4777 data->arg.new_lock_owner = 1;
c1d51931 4778 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4779 } else
4780 data->arg.new_lock_owner = 0;
5d422301
TM		 4781 if (!nfs4_valid_open_stateid(state)) {
4782 data->rpc_status = -EBADF;
4783 task->tk_action = NULL;
4784 goto out_release_open_seqid;
4785 }
26e976a8 4786 data->timestamp = jiffies;
035168ab
TM		 4787 if (nfs4_setup_sequence(data->server,
4788 &data->arg.seq_args,
2240a9e2 4789 &data->res.seq_res,
d9afbd1b 4790 task) == 0)
66179efe 4791 return;
5d422301 4792out_release_open_seqid:
2240a9e2
TM		 4793 nfs_release_seqid(data->arg.open_seqid);
4794out_release_lock_seqid:
4795 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4796out_wait:
4797 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4798 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4799}
4800
a5d16a4d
TM		 4801static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4802{
4803 struct nfs4_lockdata *data = calldata;
4804
3110ff80 4805 dprintk("%s: begin!\n", __func__);
a5d16a4d 4806
14516c3a
TM		 4807 if (!nfs4_sequence_done(task, &data->res.seq_res))
4808 return;
66179efe 4809
a5d16a4d 4810 data->rpc_status = task->tk_status;
a5d16a4d 4811 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4812 if (data->rpc_status == 0)
4813 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4814 else
4815 goto out;
4816 }
4817 if (data->rpc_status == 0) {
f597c537 4818 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4819 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4820 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4821 }
a5d16a4d 4822out:
3110ff80 4823 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4824}
4825
4826static void nfs4_lock_release(void *calldata)
4827{
4828 struct nfs4_lockdata *data = calldata;
4829
3110ff80 4830 dprintk("%s: begin!\n", __func__);
2f74c0a0 4831 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4832 if (data->cancelled != 0) {
4833 struct rpc_task *task;
4834 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4835 data->arg.lock_seqid);
4836 if (!IS_ERR(task))
bf294b41 4837 rpc_put_task_async(task);
3110ff80 4838 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4839 } else
4840 nfs_free_seqid(data->arg.lock_seqid);
4841 nfs4_put_lock_state(data->lsp);
4842 put_nfs_open_context(data->ctx);
4843 kfree(data);
3110ff80 4844 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4845}
4846
4847static const struct rpc_call_ops nfs4_lock_ops = {
4848 .rpc_call_prepare = nfs4_lock_prepare,
4849 .rpc_call_done = nfs4_lock_done,
4850 .rpc_release = nfs4_lock_release,
4851};
4852
2bee72a6
TM		 4853static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4854{
2bee72a6
TM		 4855 switch (error) {
4856 case -NFS4ERR_ADMIN_REVOKED:
4857 case -NFS4ERR_BAD_STATEID:
ecac799a 4858 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4859 if (new_lock_owner != 0 ||
795a88c9 4860 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4861 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4862 break;
4863 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4864 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4865 case -NFS4ERR_EXPIRED:
4866 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4867 };
4868}
4869
afe6c27c 4870static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4871{
4872 struct nfs4_lockdata *data;
4873 struct rpc_task *task;
5138fde0
TM		 4874 struct rpc_message msg = {
4875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4876 .rpc_cred = state->owner->so_cred,
4877 };
c970aa85
TM		 4878 struct rpc_task_setup task_setup_data = {
4879 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4880 .rpc_message = &msg,
c970aa85 4881 .callback_ops = &nfs4_lock_ops,
101070ca 4882 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4883 .flags = RPC_TASK_ASYNC,
4884 };
a5d16a4d
TM		 4885 int ret;
4886
3110ff80 4887 dprintk("%s: begin!\n", __func__);
cd3758e3 4888 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4889 fl->fl_u.nfs4_fl.owner,
4890 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4891 if (data == NULL)
4892 return -ENOMEM;
4893 if (IS_SETLKW(cmd))
4894 data->arg.block = 1;
9d12b216 4895 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4896 msg.rpc_argp = &data->arg;
4897 msg.rpc_resp = &data->res;
c970aa85 4898 task_setup_data.callback_data = data;
8fe72bac
TM		 4899 if (recovery_type > NFS_LOCK_NEW) {
4900 if (recovery_type == NFS_LOCK_RECLAIM)
4901 data->arg.reclaim = NFS_LOCK_RECLAIM;
4902 nfs4_set_sequence_privileged(&data->arg.seq_args);
4903 }
c970aa85 4904 task = rpc_run_task(&task_setup_data);
7a1218a2 4905 if (IS_ERR(task))
a5d16a4d 4906 return PTR_ERR(task);
a5d16a4d
TM		 4907 ret = nfs4_wait_for_completion_rpc_task(task);
4908 if (ret == 0) {
4909 ret = data->rpc_status;
2bee72a6
TM		 4910 if (ret)
4911 nfs4_handle_setlk_error(data->server, data->lsp,
4912 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4913 } else
4914 data->cancelled = 1;
e6b3c4db 4915 rpc_put_task(task);
3110ff80 4916 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4917 return ret;
1da177e4
LT		 4918}
4919
4920static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4921{
202b50dc 4922 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4923 struct nfs4_exception exception = {
4924 .inode = state->inode,
4925 };
202b50dc
TM		 4926 int err;
4927
4928 do {
42a2d13e
TM		 4929 /* Cache the lock if possible... */
4930 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4931 return 0;
afe6c27c 4932 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4933 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4934 break;
4935 nfs4_handle_exception(server, err, &exception);
4936 } while (exception.retry);
4937 return err;
1da177e4
LT		 4938}
4939
4940static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4941{
202b50dc 4942 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4943 struct nfs4_exception exception = {
4944 .inode = state->inode,
4945 };
202b50dc
TM		 4946 int err;
4947
6bfc93ef
TM		 4948 err = nfs4_set_lock_state(state, request);
4949 if (err != 0)
4950 return err;
202b50dc 4951 do {
42a2d13e
TM		 4952 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4953 return 0;
afe6c27c 4954 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4955 switch (err) {
4956 default:
4957 goto out;
4958 case -NFS4ERR_GRACE:
4959 case -NFS4ERR_DELAY:
4960 nfs4_handle_exception(server, err, &exception);
4961 err = 0;
4962 }
202b50dc 4963 } while (exception.retry);
a9ed2e25 4964out:
202b50dc 4965 return err;
1da177e4
LT		 4966}
4967
f062eb6c 4968#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4969/**
4970 * nfs41_check_expired_locks - possibly free a lock stateid
4971 *
4972 * @state: NFSv4 state for an inode
4973 *
4974 * Returns NFS_OK if recovery for this stateid is now finished.
4975 * Otherwise a negative NFS4ERR value is returned.
4976 */
b01dd1d8 4977static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4978{
eb64cf96 4979 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4980 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4981 struct nfs_server *server = NFS_SERVER(state->inode);
4982
b01dd1d8 4983 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4984 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4985 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4986 if (status != NFS_OK) {
3e60ffdd
CL		 4987 /* Free the stateid unless the server
4988 * informs us the stateid is unrecognized. */
89af2739
CL		 4989 if (status != -NFS4ERR_BAD_STATEID)
4990 nfs41_free_stateid(server,
4991 &lsp->ls_stateid);
795a88c9 4992 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4993 ret = status;
4994 }
4995 }
4996 };
4997
4998 return ret;
4999}
5000
5001static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5002{
5003 int status = NFS_OK;
5004
5005 if (test_bit(LK_STATE_IN_USE, &state->flags))
5006 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5007 if (status != NFS_OK)
5008 status = nfs4_lock_expired(state, request);
5009 return status;
f062eb6c
BS		 5010}
5011#endif
5012
1da177e4
LT		 5013static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5014{
9a99af49 5015 struct nfs4_state_owner *sp = state->owner;
19e03c57 5016 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5017 unsigned char fl_flags = request->fl_flags;
9a99af49 5018 unsigned int seq;
8e469ebd 5019 int status = -ENOLCK;
1da177e4 5020
8e469ebd
TM		 5021 if ((fl_flags & FL_POSIX) &&
5022 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5023 goto out;
6bfc93ef 5024 /* Is this a delegated open? */
6bfc93ef
TM		 5025 status = nfs4_set_lock_state(state, request);
5026 if (status != 0)
5027 goto out;
01c3b861
TM		 5028 request->fl_flags |= FL_ACCESS;
5029 status = do_vfs_lock(request->fl_file, request);
5030 if (status < 0)
5031 goto out;
19e03c57 5032 down_read(&nfsi->rwsem);
01c3b861 5033 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5034 /* Yes: cache locks! */
01c3b861 5035 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5036 request->fl_flags = fl_flags & ~FL_SLEEP;
5037 status = do_vfs_lock(request->fl_file, request);
5038 goto out_unlock;
01c3b861 5039 }
9a99af49
TM		 5040 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5041 up_read(&nfsi->rwsem);
afe6c27c 5042 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5043 if (status != 0)
9a99af49
TM		 5044 goto out;
5045 down_read(&nfsi->rwsem);
5046 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5047 status = -NFS4ERR_DELAY;
01c3b861 5048 goto out_unlock;
9a99af49 5049 }
6bfc93ef 5050 /* Note: we always want to sleep here! */
01c3b861 5051 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5052 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5053 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5054 "manager!\n", __func__);
01c3b861 5055out_unlock:
19e03c57 5056 up_read(&nfsi->rwsem);
01c3b861
TM		 5057out:
5058 request->fl_flags = fl_flags;
1da177e4
LT		 5059 return status;
5060}
5061
5062static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5063{
a1d0b5ee
TM		 5064 struct nfs4_exception exception = {
5065 .state = state,
05ffe24f 5066 .inode = state->inode,
a1d0b5ee 5067 };
1da177e4
LT		 5068 int err;
5069
5070 do {
965b5d67
TM		 5071 err = _nfs4_proc_setlk(state, cmd, request);
5072 if (err == -NFS4ERR_DENIED)
5073 err = -EAGAIN;
1da177e4 5074 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5075 err, &exception);
1da177e4
LT		 5076 } while (exception.retry);
5077 return err;
5078}
5079
5080static int
5081nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5082{
5083 struct nfs_open_context *ctx;
5084 struct nfs4_state *state;
5085 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5086 int status;
5087
5088 /* verify open state */
cd3758e3 5089 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5090 state = ctx->state;
5091
5092 if (request->fl_start < 0 || request->fl_end < 0)
5093 return -EINVAL;
5094
d953126a
TM		 5095 if (IS_GETLK(cmd)) {
5096 if (state != NULL)
5097 return nfs4_proc_getlk(state, F_GETLK, request);
5098 return 0;
5099 }
1da177e4
LT		 5100
5101 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5102 return -EINVAL;
5103
d953126a
TM		 5104 if (request->fl_type == F_UNLCK) {
5105 if (state != NULL)
5106 return nfs4_proc_unlck(state, cmd, request);
5107 return 0;
5108 }
1da177e4 5109
d953126a
TM		 5110 if (state == NULL)
5111 return -ENOLCK;
55725513
TM		 5112 /*
5113 * Don't rely on the VFS having checked the file open mode,
5114 * since it won't do this for flock() locks.
5115 */
f44106e2 5116 switch (request->fl_type) {
55725513
TM		 5117 case F_RDLCK:
5118 if (!(filp->f_mode & FMODE_READ))
5119 return -EBADF;
5120 break;
5121 case F_WRLCK:
5122 if (!(filp->f_mode & FMODE_WRITE))
5123 return -EBADF;
5124 }
5125
1da177e4
LT		 5126 do {
5127 status = nfs4_proc_setlk(state, cmd, request);
5128 if ((status != -EAGAIN) || IS_SETLK(cmd))
5129 break;
5130 timeout = nfs4_set_lock_task_retry(timeout);
5131 status = -ERESTARTSYS;
5132 if (signalled())
5133 break;
5134 } while(status < 0);
1da177e4
LT		 5135 return status;
5136}
5137
888e694c
TM		 5138int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5139{
5140 struct nfs_server *server = NFS_SERVER(state->inode);
5141 struct nfs4_exception exception = { };
5142 int err;
5143
5144 err = nfs4_set_lock_state(state, fl);
5145 if (err != 0)
5146 goto out;
5147 do {
afe6c27c 5148 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5149 switch (err) {
5150 default:
a030889a
WAA		 5151 printk(KERN_ERR "NFS: %s: unhandled error "
5152 "%d.\n", __func__, err);
d5122201 5153 case 0:
965b5d67 5154 case -ESTALE:
d5122201 5155 goto out;
d5122201 5156 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5157 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5158 set_bit(NFS_DELEGATED_STATE, &state->flags);
5159 case -NFS4ERR_EXPIRED:
0400a6b0 5160 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5161 err = -EAGAIN;
0400a6b0 5162 goto out;
74e7bb73
RL		 5163 case -NFS4ERR_BADSESSION:
5164 case -NFS4ERR_BADSLOT:
5165 case -NFS4ERR_BAD_HIGH_SLOT:
5166 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5167 case -NFS4ERR_DEADSESSION:
37380e42 5168 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5169 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5170 err = -EAGAIN;
d5122201 5171 goto out;
a1d0b5ee 5172 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5173 case -NFS4ERR_ADMIN_REVOKED:
5174 case -NFS4ERR_BAD_STATEID:
5175 case -NFS4ERR_OPENMODE:
0400a6b0 5176 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5177 err = 0;
5178 goto out;
5179 case -ENOMEM:
5180 case -NFS4ERR_DENIED:
5181 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5182 err = 0;
5183 goto out;
d5122201 5184 }
37380e42 5185 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5186 err = nfs4_handle_exception(server, err, &exception);
5187 } while (exception.retry);
5188out:
5189 return err;
5190}
6b3b5496 5191
cf470c3e
TM		 5192struct nfs_release_lockowner_data {
5193 struct nfs4_lock_state *lsp;
5ae67c4f 5194 struct nfs_server *server;
cf470c3e
TM		 5195 struct nfs_release_lockowner_args args;
5196};
5197
d3c7b7cc
TM		 5198static void nfs4_release_lockowner_release(void *calldata)
5199{
cf470c3e 5200 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5201 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5202 kfree(calldata);
5203}
5204
17280175 5205static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5206 .rpc_release = nfs4_release_lockowner_release,
5207};
5208
cf470c3e 5209int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5210{
5211 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5212 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5213 struct rpc_message msg = {
5214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5215 };
5216
5217 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5218 return -EINVAL;
5219 data = kmalloc(sizeof(*data), GFP_NOFS);
5220 if (!data)
5221 return -ENOMEM;
5222 data->lsp = lsp;
5ae67c4f 5223 data->server = server;
cf470c3e
TM		 5224 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5225 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5226 data->args.lock_owner.s_dev = server->s_dev;
5227 msg.rpc_argp = &data->args;
5228 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5229 return 0;
d3c7b7cc
TM		 5230}
5231
aa1870af
BF		 5232#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5233
64c2ce8b
AK		 5234static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5235 const void *buf, size_t buflen,
5236 int flags, int type)
6b3b5496 5237{
64c2ce8b
AK		 5238 if (strcmp(key, "") != 0)
5239 return -EINVAL;
4b580ee3 5240
64c2ce8b 5241 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5242}
5243
64c2ce8b
AK		 5244static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5245 void *buf, size_t buflen, int type)
6b3b5496 5246{
64c2ce8b
AK		 5247 if (strcmp(key, "") != 0)
5248 return -EINVAL;
aa1870af 5249
64c2ce8b 5250 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5251}
5252
64c2ce8b
AK		 5253static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5254 size_t list_len, const char *name,
5255 size_t name_len, int type)
6b3b5496 5256{
64c2ce8b 5257 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5258
096455a2
BF		 5259 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5260 return 0;
64c2ce8b
AK		 5261
5262 if (list && len <= list_len)
5263 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5264 return len;
6b3b5496
BF		 5265}
5266
533eb461
AA		 5267/*
5268 * nfs_fhget will use either the mounted_on_fileid or the fileid
5269 */
69aaaae1
TM		 5270static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5271{
533eb461
AA		 5272 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5273 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5274 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5275 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5276 return;
5277
5278 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5279 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5280 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5281 fattr->nlink = 2;
5282}
5283
f05d147f
BS		 5284static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5285 const struct qstr *name,
5286 struct nfs4_fs_locations *fs_locations,
5287 struct page *page)
683b57b4
TM		 5288{
5289 struct nfs_server *server = NFS_SERVER(dir);
5290 u32 bitmask[2] = {
361e624f 5291 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5292 };
5293 struct nfs4_fs_locations_arg args = {
5294 .dir_fh = NFS_FH(dir),
c228fd3a 5295 .name = name,
683b57b4
TM		 5296 .page = page,
5297 .bitmask = bitmask,
5298 };
22958463
BH		 5299 struct nfs4_fs_locations_res res = {
5300 .fs_locations = fs_locations,
5301 };
683b57b4
TM		 5302 struct rpc_message msg = {
5303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5304 .rpc_argp = &args,
22958463 5305 .rpc_resp = &res,
683b57b4
TM		 5306 };
5307 int status;
5308
3110ff80 5309 dprintk("%s: start\n", __func__);
533eb461
AA		 5310
5311 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5312 * is not supported */
5313 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5314 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5315 else
5316 bitmask[0] |= FATTR4_WORD0_FILEID;
5317
c228fd3a 5318 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5319 fs_locations->server = server;
830b8e33 5320 fs_locations->nlocations = 0;
f05d147f 5321 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5322 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5323 return status;
5324}
5325
f05d147f
BS		 5326int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5327 const struct qstr *name,
5328 struct nfs4_fs_locations *fs_locations,
5329 struct page *page)
db0a9593
BS		 5330{
5331 struct nfs4_exception exception = { };
5332 int err;
5333 do {
5334 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5335 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5336 &exception);
5337 } while (exception.retry);
5338 return err;
5339}
5340
5a5ea0d4
BS		 5341static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5342{
5343 int status;
5344 struct nfs4_secinfo_arg args = {
5345 .dir_fh = NFS_FH(dir),
5346 .name = name,
5347 };
5348 struct nfs4_secinfo_res res = {
5349 .flavors = flavors,
5350 };
5351 struct rpc_message msg = {
5352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5353 .rpc_argp = &args,
5354 .rpc_resp = &res,
5355 };
5356
5357 dprintk("NFS call secinfo %s\n", name->name);
5358 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5359 dprintk("NFS reply secinfo: %d\n", status);
5360 return status;
5361}
5362
72de53ec
BS		 5363int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5364 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5365{
5366 struct nfs4_exception exception = { };
5367 int err;
5368 do {
5369 err = nfs4_handle_exception(NFS_SERVER(dir),
5370 _nfs4_proc_secinfo(dir, name, flavors),
5371 &exception);
5372 } while (exception.retry);
5373 return err;
5374}
5375
557134a3 5376#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5377/*
5378 * Check the exchange flags returned by the server for invalid flags, having
5379 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5380 * DS flags set.
5381 */
5382static int nfs4_check_cl_exchange_flags(u32 flags)
5383{
5384 if (flags & ~EXCHGID4_FLAG_MASK_R)
5385 goto out_inval;
5386 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5387 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5388 goto out_inval;
5389 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5390 goto out_inval;
5391 return NFS_OK;
5392out_inval:
5393 return -NFS4ERR_INVAL;
5394}
5395
78fe0f41 5396static bool
79d4e1f0
CL		 5397nfs41_same_server_scope(struct nfs41_server_scope *a,
5398 struct nfs41_server_scope *b)
78fe0f41
WAA		 5399{
5400 if (a->server_scope_sz == b->server_scope_sz &&
5401 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5402 return true;
5403
5404 return false;
5405}
5406
7c44f1ae
WAA		 5407/*
5408 * nfs4_proc_bind_conn_to_session()
5409 *
5410 * The 4.1 client currently uses the same TCP connection for the
5411 * fore and backchannel.
5412 */
2cf047c9 5413int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5414{
5415 int status;
5416 struct nfs41_bind_conn_to_session_res res;
5417 struct rpc_message msg = {
5418 .rpc_proc =
5419 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5420 .rpc_argp = clp,
5421 .rpc_resp = &res,
2cf047c9 5422 .rpc_cred = cred,
7c44f1ae
WAA		 5423 };
5424
5425 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5426
5427 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5428 if (unlikely(res.session == NULL)) {
5429 status = -ENOMEM;
5430 goto out;
5431 }
5432
5433 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5434 if (status == 0) {
5435 if (memcmp(res.session->sess_id.data,
5436 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5437 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5438 status = -EIO;
5439 goto out_session;
5440 }
5441 if (res.dir != NFS4_CDFS4_BOTH) {
5442 dprintk("NFS: %s: Unexpected direction from server\n",
5443 __func__);
5444 status = -EIO;
5445 goto out_session;
5446 }
5447 if (res.use_conn_in_rdma_mode) {
5448 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5449 __func__);
5450 status = -EIO;
5451 goto out_session;
5452 }
5453 }
5454out_session:
5455 kfree(res.session);
5456out:
5457 dprintk("<-- %s status= %d\n", __func__, status);
5458 return status;
5459}
5460
99fe60d0
BH		 5461/*
5462 * nfs4_proc_exchange_id()
5463 *
6bbb4ae8
CL		 5464 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5465 *
99fe60d0
BH		 5466 * Since the clientid has expired, all compounds using sessions
5467 * associated with the stale clientid will be returning
5468 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5469 * be in some phase of session reset.
5470 */
4d643d1d 5471int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5472{
5473 nfs4_verifier verifier;
5474 struct nfs41_exchange_id_args args = {
cd93710e 5475 .verifier = &verifier,
99fe60d0 5476 .client = clp,
357f54d6 5477 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5478 };
5479 struct nfs41_exchange_id_res res = {
32b01310 5480 0
99fe60d0
BH		 5481 };
5482 int status;
5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5485 .rpc_argp = &args,
5486 .rpc_resp = &res,
5487 .rpc_cred = cred,
5488 };
99fe60d0 5489
f092075d 5490 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5491 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5492 sizeof(args.id));
6bbb4ae8
CL		 5493 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5494 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5495 args.id_len, args.id);
99fe60d0 5496
acdeb69d 5497 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5498 GFP_NOFS);
acdeb69d 5499 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5500 status = -ENOMEM;
5501 goto out;
5502 }
78fe0f41 5503
79d4e1f0 5504 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5505 GFP_NOFS);
177313f1 5506 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5507 status = -ENOMEM;
acdeb69d 5508 goto out_server_owner;
abe9a6d5 5509 }
78fe0f41 5510
bbafffd2 5511 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5512 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5513 status = -ENOMEM;
5514 goto out_server_scope;
5515 }
5516
1bd714f2 5517 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5518 if (status == 0)
32b01310 5519 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5520
acdeb69d 5521 if (status == 0) {
32b01310
TM		 5522 clp->cl_clientid = res.clientid;
5523 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5524 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5525 clp->cl_seqid = res.seqid;
5526
acdeb69d
CL		 5527 kfree(clp->cl_serverowner);
5528 clp->cl_serverowner = res.server_owner;
5529 res.server_owner = NULL;
78fe0f41 5530
7d2ed9ac 5531 /* use the most recent implementation id */
59155546
CL		 5532 kfree(clp->cl_implid);
5533 clp->cl_implid = res.impl_id;
7d2ed9ac 5534
177313f1 5535 if (clp->cl_serverscope != NULL &&
79d4e1f0 5536 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5537 res.server_scope)) {
5538 dprintk("%s: server_scope mismatch detected\n",
5539 __func__);
5540 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5541 kfree(clp->cl_serverscope);
5542 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5543 }
5544
177313f1 5545 if (clp->cl_serverscope == NULL) {
79d4e1f0 5546 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5547 goto out;
5548 }
32b01310
TM		 5549 } else
5550 kfree(res.impl_id);
7d2ed9ac 5551
acdeb69d
CL		 5552out_server_owner:
5553 kfree(res.server_owner);
7d2ed9ac 5554out_server_scope:
abe9a6d5
WAA		 5555 kfree(res.server_scope);
5556out:
177313f1 5557 if (clp->cl_implid != NULL)
6bbb4ae8 5558 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5559 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5560 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5561 clp->cl_implid->date.seconds,
5562 clp->cl_implid->date.nseconds);
6bbb4ae8 5563 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5564 return status;
5565}
5566
66245539
TM		 5567static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5568 struct rpc_cred *cred)
5569{
5570 struct rpc_message msg = {
5571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5572 .rpc_argp = clp,
5573 .rpc_cred = cred,
5574 };
5575 int status;
5576
5577 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5578 if (status)
02c67525 5579 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5580 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5581 return status;
5582}
5583
5584static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5585 struct rpc_cred *cred)
5586{
5587 unsigned int loop;
5588 int ret;
5589
5590 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5591 ret = _nfs4_proc_destroy_clientid(clp, cred);
5592 switch (ret) {
5593 case -NFS4ERR_DELAY:
5594 case -NFS4ERR_CLIENTID_BUSY:
5595 ssleep(1);
5596 break;
5597 default:
5598 return ret;
5599 }
5600 }
5601 return 0;
5602}
5603
5604int nfs4_destroy_clientid(struct nfs_client *clp)
5605{
5606 struct rpc_cred *cred;
5607 int ret = 0;
5608
5609 if (clp->cl_mvops->minor_version < 1)
5610 goto out;
5611 if (clp->cl_exchange_flags == 0)
5612 goto out;
05f4c350
CL		 5613 if (clp->cl_preserve_clid)
5614 goto out;
66245539
TM		 5615 cred = nfs4_get_exchange_id_cred(clp);
5616 ret = nfs4_proc_destroy_clientid(clp, cred);
5617 if (cred)
5618 put_rpccred(cred);
5619 switch (ret) {
5620 case 0:
5621 case -NFS4ERR_STALE_CLIENTID:
5622 clp->cl_exchange_flags = 0;
5623 }
5624out:
5625 return ret;
5626}
5627
2050f0cc
AA		 5628struct nfs4_get_lease_time_data {
5629 struct nfs4_get_lease_time_args *args;
5630 struct nfs4_get_lease_time_res *res;
5631 struct nfs_client *clp;
5632};
5633
5634static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5635 void *calldata)
5636{
2050f0cc
AA		 5637 struct nfs4_get_lease_time_data *data =
5638 (struct nfs4_get_lease_time_data *)calldata;
5639
5640 dprintk("--> %s\n", __func__);
5641 /* just setup sequence, do not trigger session recovery
5642 since we're invoked within one */
d9afbd1b
TM		 5643 nfs41_setup_sequence(data->clp->cl_session,
5644 &data->args->la_seq_args,
5645 &data->res->lr_seq_res,
5646 task);
2050f0cc
AA		 5647 dprintk("<-- %s\n", __func__);
5648}
5649
5650/*
5651 * Called from nfs4_state_manager thread for session setup, so don't recover
5652 * from sequence operation or clientid errors.
5653 */
5654static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5655{
5656 struct nfs4_get_lease_time_data *data =
5657 (struct nfs4_get_lease_time_data *)calldata;
5658
5659 dprintk("--> %s\n", __func__);
14516c3a
TM		 5660 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5661 return;
2050f0cc
AA		 5662 switch (task->tk_status) {
5663 case -NFS4ERR_DELAY:
5664 case -NFS4ERR_GRACE:
5665 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5666 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5667 task->tk_status = 0;
a8a4ae3a
AA		 5668 /* fall through */
5669 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5670 rpc_restart_call_prepare(task);
2050f0cc
AA		 5671 return;
5672 }
2050f0cc
AA		 5673 dprintk("<-- %s\n", __func__);
5674}
5675
17280175 5676static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5677 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5678 .rpc_call_done = nfs4_get_lease_time_done,
5679};
5680
5681int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5682{
5683 struct rpc_task *task;
5684 struct nfs4_get_lease_time_args args;
5685 struct nfs4_get_lease_time_res res = {
5686 .lr_fsinfo = fsinfo,
5687 };
5688 struct nfs4_get_lease_time_data data = {
5689 .args = &args,
5690 .res = &res,
5691 .clp = clp,
5692 };
5693 struct rpc_message msg = {
5694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5695 .rpc_argp = &args,
5696 .rpc_resp = &res,
5697 };
5698 struct rpc_task_setup task_setup = {
5699 .rpc_client = clp->cl_rpcclient,
5700 .rpc_message = &msg,
5701 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5702 .callback_data = &data,
5703 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5704 };
5705 int status;
5706
9d12b216 5707 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5708 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5709 dprintk("--> %s\n", __func__);
5710 task = rpc_run_task(&task_setup);
5711
5712 if (IS_ERR(task))
5713 status = PTR_ERR(task);
5714 else {
5715 status = task->tk_status;
5716 rpc_put_task(task);
5717 }
5718 dprintk("<-- %s return %d\n", __func__, status);
5719
5720 return status;
5721}
5722
fc931582
AA		 5723/*
5724 * Initialize the values to be used by the client in CREATE_SESSION
5725 * If nfs4_init_session set the fore channel request and response sizes,
5726 * use them.
5727 *
5728 * Set the back channel max_resp_sz_cached to zero to force the client to
5729 * always set csa_cachethis to FALSE because the current implementation
5730 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5731 */
5732static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5733{
5734 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5735 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5736 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5737
5738 if (mxrqst_sz == 0)
5739 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5740 if (mxresp_sz == 0)
5741 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5742 /* Fore channel attributes */
fc931582
AA		 5743 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5744 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5745 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5746 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5747
5748 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5749 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5750 __func__,
5751 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5752 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5753
5754 /* Back channel attributes */
fc931582
AA		 5755 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5756 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5757 args->bc_attrs.max_resp_sz_cached = 0;
5758 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5759 args->bc_attrs.max_reqs = 1;
5760
5761 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5762 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5763 __func__,
5764 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5765 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5766 args->bc_attrs.max_reqs);
5767}
5768
43c2e885 5769static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5770{
43c2e885
BF		 5771 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5772 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5773
43c2e885
BF		 5774 if (rcvd->max_resp_sz > sent->max_resp_sz)
5775 return -EINVAL;
5776 /*
5777 * Our requested max_ops is the minimum we need; we're not
5778 * prepared to break up compounds into smaller pieces than that.
5779 * So, no point even trying to continue if the server won't
5780 * cooperate:
5781 */
5782 if (rcvd->max_ops < sent->max_ops)
5783 return -EINVAL;
5784 if (rcvd->max_reqs == 0)
5785 return -EINVAL;
b4b9a0c1
VG		 5786 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5787 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5788 return 0;
8d35301d
AA		 5789}
5790
43c2e885
BF		 5791static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5792{
5793 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5794 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5795
43c2e885
BF		 5796 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5797 return -EINVAL;
5798 if (rcvd->max_resp_sz < sent->max_resp_sz)
5799 return -EINVAL;
5800 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5801 return -EINVAL;
5802 /* These would render the backchannel useless: */
b4b9a0c1 5803 if (rcvd->max_ops != sent->max_ops)
43c2e885 5804 return -EINVAL;
b4b9a0c1 5805 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5806 return -EINVAL;
5807 return 0;
5808}
8d35301d 5809
8d35301d
AA		 5810static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5811 struct nfs4_session *session)
5812{
43c2e885 5813 int ret;
8d35301d 5814
43c2e885
BF		 5815 ret = nfs4_verify_fore_channel_attrs(args, session);
5816 if (ret)
5817 return ret;
5818 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5819}
5820
848f5bda
TM		 5821static int _nfs4_proc_create_session(struct nfs_client *clp,
5822 struct rpc_cred *cred)
fc931582
AA		 5823{
5824 struct nfs4_session *session = clp->cl_session;
5825 struct nfs41_create_session_args args = {
5826 .client = clp,
5827 .cb_program = NFS4_CALLBACK,
5828 };
5829 struct nfs41_create_session_res res = {
5830 .client = clp,
5831 };
5832 struct rpc_message msg = {
5833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5834 .rpc_argp = &args,
5835 .rpc_resp = &res,
848f5bda 5836 .rpc_cred = cred,
fc931582
AA		 5837 };
5838 int status;
5839
5840 nfs4_init_channel_attrs(&args);
0f91421e 5841 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5842
1bd714f2 5843 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5844
43095d39 5845 if (!status) {
8d35301d
AA		 5846 /* Verify the session's negotiated channel_attrs values */
5847 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5848 /* Increment the clientid slot sequence id */
5849 clp->cl_seqid++;
5850 }
5851
5852 return status;
5853}
5854
5855/*
5856 * Issues a CREATE_SESSION operation to the server.
5857 * It is the responsibility of the caller to verify the session is
5858 * expired before calling this routine.
5859 */
848f5bda 5860int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5861{
5862 int status;
5863 unsigned *ptr;
fc931582
AA		 5864 struct nfs4_session *session = clp->cl_session;
5865
5866 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5867
848f5bda 5868 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5869 if (status)
5870 goto out;
5871
aacd5537
AA		 5872 /* Init or reset the session slot tables */
5873 status = nfs4_setup_session_slot_tables(session);
5874 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5875 if (status)
5876 goto out;
5877
5878 ptr = (unsigned *)&session->sess_id.data[0];
5879 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5880 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5881out:
5882 dprintk("<-- %s\n", __func__);
5883 return status;
5884}
5885
0f3e66c6
AA		 5886/*
5887 * Issue the over-the-wire RPC DESTROY_SESSION.
5888 * The caller must serialize access to this routine.
5889 */
848f5bda
TM		 5890int nfs4_proc_destroy_session(struct nfs4_session *session,
5891 struct rpc_cred *cred)
0f3e66c6 5892{
848f5bda
TM		 5893 struct rpc_message msg = {
5894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5895 .rpc_argp = session,
5896 .rpc_cred = cred,
5897 };
0f3e66c6 5898 int status = 0;
0f3e66c6
AA		 5899
5900 dprintk("--> nfs4_proc_destroy_session\n");
5901
5902 /* session is still being setup */
5903 if (session->clp->cl_cons_state != NFS_CS_READY)
5904 return status;
5905
1bd714f2 5906 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5907
5908 if (status)
08106ac7 5909 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5910 "Session has been destroyed regardless...\n", status);
5911
5912 dprintk("<-- nfs4_proc_destroy_session\n");
5913 return status;
5914}
5915
fc01cea9
AA		 5916/*
5917 * Renew the cl_session lease.
5918 */
d5f8d3fe
TM		 5919struct nfs4_sequence_data {
5920 struct nfs_client *clp;
5921 struct nfs4_sequence_args args;
5922 struct nfs4_sequence_res res;
5923};
5924
dc96aef9
AB		 5925static void nfs41_sequence_release(void *data)
5926{
d5f8d3fe
TM		 5927 struct nfs4_sequence_data *calldata = data;
5928 struct nfs_client *clp = calldata->clp;
dc96aef9 5929
7135840f
AB		 5930 if (atomic_read(&clp->cl_count) > 1)
5931 nfs4_schedule_state_renewal(clp);
5932 nfs_put_client(clp);
d5f8d3fe 5933 kfree(calldata);
dc96aef9
AB		 5934}
5935
aa5190d0
TM		 5936static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5937{
5938 switch(task->tk_status) {
5939 case -NFS4ERR_DELAY:
aa5190d0
TM		 5940 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5941 return -EAGAIN;
5942 default:
0400a6b0 5943 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5944 }
5945 return 0;
5946}
5947
dc96aef9 5948static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5949{
d5f8d3fe
TM		 5950 struct nfs4_sequence_data *calldata = data;
5951 struct nfs_client *clp = calldata->clp;
fc01cea9 5952
14516c3a
TM		 5953 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5954 return;
fc01cea9
AA		 5955
5956 if (task->tk_status < 0) {
5957 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5958 if (atomic_read(&clp->cl_count) == 1)
5959 goto out;
fc01cea9 5960
aa5190d0
TM		 5961 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5962 rpc_restart_call_prepare(task);
fc01cea9
AA		 5963 return;
5964 }
5965 }
fc01cea9 5966 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5967out:
fc01cea9
AA		 5968 dprintk("<-- %s\n", __func__);
5969}
5970
5971static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5972{
d5f8d3fe
TM		 5973 struct nfs4_sequence_data *calldata = data;
5974 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5975 struct nfs4_sequence_args *args;
5976 struct nfs4_sequence_res *res;
5977
fc01cea9
AA		 5978 args = task->tk_msg.rpc_argp;
5979 res = task->tk_msg.rpc_resp;
5980
d9afbd1b 5981 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5982}
5983
5984static const struct rpc_call_ops nfs41_sequence_ops = {
5985 .rpc_call_done = nfs41_sequence_call_done,
5986 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5987 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5988};
5989
8fe72bac
TM		 5990static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5991 struct rpc_cred *cred,
5992 bool is_privileged)
fc01cea9 5993{
d5f8d3fe 5994 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5995 struct rpc_message msg = {
5996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5997 .rpc_cred = cred,
5998 };
71ac6da9
TM		 5999 struct rpc_task_setup task_setup_data = {
6000 .rpc_client = clp->cl_rpcclient,
6001 .rpc_message = &msg,
8fe72bac 6002 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 6003 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6004 };
fc01cea9 6005
7135840f 6006 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6007 return ERR_PTR(-EIO);
dfb4f309 6008 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6009 if (calldata == NULL) {
7135840f 6010 nfs_put_client(clp);
71ac6da9 6011 return ERR_PTR(-ENOMEM);
fc01cea9 6012 }
9d12b216 6013 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6014 if (is_privileged)
6015 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6016 msg.rpc_argp = &calldata->args;
6017 msg.rpc_resp = &calldata->res;
6018 calldata->clp = clp;
71ac6da9 6019 task_setup_data.callback_data = calldata;
fc01cea9 6020
71ac6da9
TM		 6021 return rpc_run_task(&task_setup_data);
6022}
6023
2f60ea6b 6024static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6025{
6026 struct rpc_task *task;
6027 int ret = 0;
6028
2f60ea6b
TM		 6029 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6030 return 0;
8fe72bac 6031 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6032 if (IS_ERR(task))
6033 ret = PTR_ERR(task);
6034 else
bf294b41 6035 rpc_put_task_async(task);
71ac6da9
TM		 6036 dprintk("<-- %s status=%d\n", __func__, ret);
6037 return ret;
6038}
6039
6040static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6041{
6042 struct rpc_task *task;
6043 int ret;
6044
8fe72bac 6045 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6046 if (IS_ERR(task)) {
6047 ret = PTR_ERR(task);
6048 goto out;
6049 }
6050 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6051 if (!ret) {
6052 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6053
6054 if (task->tk_status == 0)
6055 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6056 ret = task->tk_status;
b4410c2f 6057 }
71ac6da9
TM		 6058 rpc_put_task(task);
6059out:
6060 dprintk("<-- %s status=%d\n", __func__, ret);
6061 return ret;
fc01cea9
AA		 6062}
6063
fce5c838
RL		 6064struct nfs4_reclaim_complete_data {
6065 struct nfs_client *clp;
6066 struct nfs41_reclaim_complete_args arg;
6067 struct nfs41_reclaim_complete_res res;
6068};
6069
6070static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6071{
6072 struct nfs4_reclaim_complete_data *calldata = data;
6073
d9afbd1b
TM		 6074 nfs41_setup_sequence(calldata->clp->cl_session,
6075 &calldata->arg.seq_args,
6076 &calldata->res.seq_res,
6077 task);
fce5c838
RL		 6078}
6079
aa5190d0
TM		 6080static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6081{
6082 switch(task->tk_status) {
6083 case 0:
6084 case -NFS4ERR_COMPLETE_ALREADY:
6085 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6086 break;
6087 case -NFS4ERR_DELAY:
aa5190d0 6088 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6089 /* fall through */
6090 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6091 return -EAGAIN;
6092 default:
0400a6b0 6093 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6094 }
6095 return 0;
6096}
6097
fce5c838
RL		 6098static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6099{
6100 struct nfs4_reclaim_complete_data *calldata = data;
6101 struct nfs_client *clp = calldata->clp;
6102 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6103
6104 dprintk("--> %s\n", __func__);
14516c3a
TM		 6105 if (!nfs41_sequence_done(task, res))
6106 return;
fce5c838 6107
aa5190d0
TM		 6108 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6109 rpc_restart_call_prepare(task);
6110 return;
6111 }
fce5c838
RL		 6112 dprintk("<-- %s\n", __func__);
6113}
6114
6115static void nfs4_free_reclaim_complete_data(void *data)
6116{
6117 struct nfs4_reclaim_complete_data *calldata = data;
6118
6119 kfree(calldata);
6120}
6121
6122static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6123 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6124 .rpc_call_done = nfs4_reclaim_complete_done,
6125 .rpc_release = nfs4_free_reclaim_complete_data,
6126};
6127
6128/*
6129 * Issue a global reclaim complete.
6130 */
6131static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6132{
6133 struct nfs4_reclaim_complete_data *calldata;
6134 struct rpc_task *task;
6135 struct rpc_message msg = {
6136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6137 };
6138 struct rpc_task_setup task_setup_data = {
6139 .rpc_client = clp->cl_rpcclient,
6140 .rpc_message = &msg,
6141 .callback_ops = &nfs4_reclaim_complete_call_ops,
6142 .flags = RPC_TASK_ASYNC,
6143 };
6144 int status = -ENOMEM;
6145
6146 dprintk("--> %s\n", __func__);
8535b2be 6147 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6148 if (calldata == NULL)
6149 goto out;
6150 calldata->clp = clp;
6151 calldata->arg.one_fs = 0;
fce5c838 6152
9d12b216 6153 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6154 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6155 msg.rpc_argp = &calldata->arg;
6156 msg.rpc_resp = &calldata->res;
6157 task_setup_data.callback_data = calldata;
6158 task = rpc_run_task(&task_setup_data);
acf82b85 6159 if (IS_ERR(task)) {
fce5c838 6160 status = PTR_ERR(task);
acf82b85
DC		 6161 goto out;
6162 }
c34c32ea
AA		 6163 status = nfs4_wait_for_completion_rpc_task(task);
6164 if (status == 0)
6165 status = task->tk_status;
fce5c838 6166 rpc_put_task(task);
acf82b85 6167 return 0;
fce5c838
RL		 6168out:
6169 dprintk("<-- %s status=%d\n", __func__, status);
6170 return status;
6171}
b1f69b75
AA		 6172
6173static void
6174nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6175{
6176 struct nfs4_layoutget *lgp = calldata;
c31663d4 6177 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6178 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6179
6180 dprintk("--> %s\n", __func__);
c31663d4
FI		 6181 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6182 * right now covering the LAYOUTGET we are about to send.
6183 * However, that is not so catastrophic, and there seems
6184 * to be no way to prevent it completely.
6185 */
6ba7db34 6186 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6187 &lgp->res.seq_res, task))
b1f69b75 6188 return;
cf7d63f1
FI		 6189 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6190 NFS_I(lgp->args.inode)->layout,
6191 lgp->args.ctx->state)) {
6192 rpc_exit(task, NFS4_OK);
cf7d63f1 6193 }
b1f69b75
AA		 6194}
6195
6196static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6197{
6198 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6199 struct inode *inode = lgp->args.inode;
6200 struct nfs_server *server = NFS_SERVER(inode);
6201 struct pnfs_layout_hdr *lo;
6202 struct nfs4_state *state = NULL;
30005121 6203 unsigned long timeo, giveup;
b1f69b75
AA		 6204
6205 dprintk("--> %s\n", __func__);
6206
6ba7db34 6207 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6208 goto out;
b1f69b75
AA		 6209
6210 switch (task->tk_status) {
6211 case 0:
ee314c2a 6212 goto out;
b1f69b75
AA		 6213 case -NFS4ERR_LAYOUTTRYLATER:
6214 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6215 timeo = rpc_get_timeout(task->tk_client);
6216 giveup = lgp->args.timestamp + timeo;
6217 if (time_after(giveup, jiffies))
6218 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6219 break;
6220 case -NFS4ERR_EXPIRED:
6221 case -NFS4ERR_BAD_STATEID:
6222 spin_lock(&inode->i_lock);
6223 lo = NFS_I(inode)->layout;
6224 if (!lo || list_empty(&lo->plh_segs)) {
6225 spin_unlock(&inode->i_lock);
6226 /* If the open stateid was bad, then recover it. */
6227 state = lgp->args.ctx->state;
6228 } else {
6229 LIST_HEAD(head);
6230
6231 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6232 spin_unlock(&inode->i_lock);
6233 /* Mark the bad layout state as invalid, then
6234 * retry using the open stateid. */
6235 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6236 }
6237 }
ee314c2a
TM		 6238 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6239 rpc_restart_call_prepare(task);
6240out:
b1f69b75
AA		 6241 dprintk("<-- %s\n", __func__);
6242}
6243
8554116e
IK		 6244static size_t max_response_pages(struct nfs_server *server)
6245{
6246 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6247 return nfs_page_array_len(0, max_resp_sz);
6248}
6249
6250static void nfs4_free_pages(struct page **pages, size_t size)
6251{
6252 int i;
6253
6254 if (!pages)
6255 return;
6256
6257 for (i = 0; i < size; i++) {
6258 if (!pages[i])
6259 break;
6260 __free_page(pages[i]);
6261 }
6262 kfree(pages);
6263}
6264
6265static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6266{
6267 struct page **pages;
6268 int i;
6269
6270 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6271 if (!pages) {
6272 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6273 return NULL;
6274 }
6275
6276 for (i = 0; i < size; i++) {
6277 pages[i] = alloc_page(gfp_flags);
6278 if (!pages[i]) {
6279 dprintk("%s: failed to allocate page\n", __func__);
6280 nfs4_free_pages(pages, size);
6281 return NULL;
6282 }
6283 }
6284
6285 return pages;
6286}
6287
b1f69b75
AA		 6288static void nfs4_layoutget_release(void *calldata)
6289{
6290 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6291 struct inode *inode = lgp->args.inode;
6292 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6293 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6294
6295 dprintk("--> %s\n", __func__);
8554116e 6296 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6297 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6298 put_nfs_open_context(lgp->args.ctx);
6299 kfree(calldata);
6300 dprintk("<-- %s\n", __func__);
6301}
6302
6303static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6304 .rpc_call_prepare = nfs4_layoutget_prepare,
6305 .rpc_call_done = nfs4_layoutget_done,
6306 .rpc_release = nfs4_layoutget_release,
6307};
6308
a0b0a6e3
TM		 6309struct pnfs_layout_segment *
6310nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6311{
a47970ff
WAA		 6312 struct inode *inode = lgp->args.inode;
6313 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6314 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6315 struct rpc_task *task;
6316 struct rpc_message msg = {
6317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6318 .rpc_argp = &lgp->args,
6319 .rpc_resp = &lgp->res,
6320 };
6321 struct rpc_task_setup task_setup_data = {
6322 .rpc_client = server->client,
6323 .rpc_message = &msg,
6324 .callback_ops = &nfs4_layoutget_call_ops,
6325 .callback_data = lgp,
6326 .flags = RPC_TASK_ASYNC,
6327 };
a0b0a6e3 6328 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6329 int status = 0;
6330
6331 dprintk("--> %s\n", __func__);
6332
8554116e
IK		 6333 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6334 if (!lgp->args.layout.pages) {
6335 nfs4_layoutget_release(lgp);
a0b0a6e3 6336 return ERR_PTR(-ENOMEM);
8554116e
IK		 6337 }
6338 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6339 lgp->args.timestamp = jiffies;
8554116e 6340
35124a09 6341 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6342 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6343 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6344
6345 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6346 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6347
b1f69b75
AA		 6348 task = rpc_run_task(&task_setup_data);
6349 if (IS_ERR(task))
a0b0a6e3 6350 return ERR_CAST(task);
b1f69b75 6351 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6352 if (status == 0)
6353 status = task->tk_status;
085b7a45
WAA		 6354 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6355 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6356 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6357 rpc_put_task(task);
6358 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6359 if (status)
6360 return ERR_PTR(status);
6361 return lseg;
b1f69b75
AA		 6362}
6363
cbe82603
BH		 6364static void
6365nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6366{
6367 struct nfs4_layoutreturn *lrp = calldata;
6368
6369 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6370 nfs41_setup_sequence(lrp->clp->cl_session,
6371 &lrp->args.seq_args,
6372 &lrp->res.seq_res,
6373 task);
cbe82603
BH		 6374}
6375
6376static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6377{
6378 struct nfs4_layoutreturn *lrp = calldata;
6379 struct nfs_server *server;
6380
6381 dprintk("--> %s\n", __func__);
6382
6ba7db34 6383 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6384 return;
6385
6386 server = NFS_SERVER(lrp->args.inode);
6387 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6388 rpc_restart_call_prepare(task);
cbe82603
BH		 6389 return;
6390 }
cbe82603
BH		 6391 dprintk("<-- %s\n", __func__);
6392}
6393
6394static void nfs4_layoutreturn_release(void *calldata)
6395{
6396 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6397 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6398
6399 dprintk("--> %s\n", __func__);
849b286f
TM		 6400 spin_lock(&lo->plh_inode->i_lock);
6401 if (lrp->res.lrs_present)
6402 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6403 lo->plh_block_lgets--;
6404 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6405 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6406 kfree(calldata);
6407 dprintk("<-- %s\n", __func__);
6408}
6409
6410static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6411 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6412 .rpc_call_done = nfs4_layoutreturn_done,
6413 .rpc_release = nfs4_layoutreturn_release,
6414};
6415
6416int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6417{
6418 struct rpc_task *task;
6419 struct rpc_message msg = {
6420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6421 .rpc_argp = &lrp->args,
6422 .rpc_resp = &lrp->res,
6423 };
6424 struct rpc_task_setup task_setup_data = {
6425 .rpc_client = lrp->clp->cl_rpcclient,
6426 .rpc_message = &msg,
6427 .callback_ops = &nfs4_layoutreturn_call_ops,
6428 .callback_data = lrp,
6429 };
6430 int status;
6431
6432 dprintk("--> %s\n", __func__);
9d12b216 6433 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6434 task = rpc_run_task(&task_setup_data);
6435 if (IS_ERR(task))
6436 return PTR_ERR(task);
6437 status = task->tk_status;
6438 dprintk("<-- %s status=%d\n", __func__, status);
6439 rpc_put_task(task);
6440 return status;
6441}
6442
7f11d8d3
AA		 6443/*
6444 * Retrieve the list of Data Server devices from the MDS.
6445 */
6446static int _nfs4_getdevicelist(struct nfs_server *server,
6447 const struct nfs_fh *fh,
6448 struct pnfs_devicelist *devlist)
6449{
6450 struct nfs4_getdevicelist_args args = {
6451 .fh = fh,
6452 .layoutclass = server->pnfs_curr_ld->id,
6453 };
6454 struct nfs4_getdevicelist_res res = {
6455 .devlist = devlist,
6456 };
6457 struct rpc_message msg = {
6458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6459 .rpc_argp = &args,
6460 .rpc_resp = &res,
6461 };
6462 int status;
6463
6464 dprintk("--> %s\n", __func__);
6465 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6466 &res.seq_res, 0);
6467 dprintk("<-- %s status=%d\n", __func__, status);
6468 return status;
6469}
6470
6471int nfs4_proc_getdevicelist(struct nfs_server *server,
6472 const struct nfs_fh *fh,
6473 struct pnfs_devicelist *devlist)
6474{
6475 struct nfs4_exception exception = { };
6476 int err;
6477
6478 do {
6479 err = nfs4_handle_exception(server,
6480 _nfs4_getdevicelist(server, fh, devlist),
6481 &exception);
6482 } while (exception.retry);
6483
6484 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6485 err, devlist->num_devs);
6486
6487 return err;
6488}
6489EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6490
b1f69b75
AA		 6491static int
6492_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6493{
6494 struct nfs4_getdeviceinfo_args args = {
6495 .pdev = pdev,
6496 };
6497 struct nfs4_getdeviceinfo_res res = {
6498 .pdev = pdev,
6499 };
6500 struct rpc_message msg = {
6501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6502 .rpc_argp = &args,
6503 .rpc_resp = &res,
6504 };
6505 int status;
6506
6507 dprintk("--> %s\n", __func__);
7c513058 6508 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6509 dprintk("<-- %s status=%d\n", __func__, status);
6510
6511 return status;
6512}
6513
6514int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6515{
6516 struct nfs4_exception exception = { };
6517 int err;
6518
6519 do {
6520 err = nfs4_handle_exception(server,
6521 _nfs4_proc_getdeviceinfo(server, pdev),
6522 &exception);
6523 } while (exception.retry);
6524 return err;
6525}
6526EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6527
863a3c6c
AA		 6528static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6529{
6530 struct nfs4_layoutcommit_data *data = calldata;
6531 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6532 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6533
d9afbd1b
TM		 6534 nfs41_setup_sequence(session,
6535 &data->args.seq_args,
6536 &data->res.seq_res,
6537 task);
863a3c6c
AA		 6538}
6539
6540static void
6541nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6542{
6543 struct nfs4_layoutcommit_data *data = calldata;
6544 struct nfs_server *server = NFS_SERVER(data->args.inode);
6545
6ba7db34 6546 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6547 return;
6548
6549 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6550 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6551 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6552 case -NFS4ERR_BADLAYOUT: /* no layout */
6553 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6554 task->tk_status = 0;
e59d27e0
TM		 6555 break;
6556 case 0:
863a3c6c
AA		 6557 nfs_post_op_update_inode_force_wcc(data->args.inode,
6558 data->res.fattr);
e59d27e0
TM		 6559 break;
6560 default:
6561 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6562 rpc_restart_call_prepare(task);
6563 return;
6564 }
6565 }
863a3c6c
AA		 6566}
6567
6568static void nfs4_layoutcommit_release(void *calldata)
6569{
6570 struct nfs4_layoutcommit_data *data = calldata;
6571
db29c089 6572 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6573 put_rpccred(data->cred);
6574 kfree(data);
6575}
6576
6577static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6578 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6579 .rpc_call_done = nfs4_layoutcommit_done,
6580 .rpc_release = nfs4_layoutcommit_release,
6581};
6582
6583int
ef311537 6584nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6585{
6586 struct rpc_message msg = {
6587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6588 .rpc_argp = &data->args,
6589 .rpc_resp = &data->res,
6590 .rpc_cred = data->cred,
6591 };
6592 struct rpc_task_setup task_setup_data = {
6593 .task = &data->task,
6594 .rpc_client = NFS_CLIENT(data->args.inode),
6595 .rpc_message = &msg,
6596 .callback_ops = &nfs4_layoutcommit_ops,
6597 .callback_data = data,
6598 .flags = RPC_TASK_ASYNC,
6599 };
6600 struct rpc_task *task;
6601 int status = 0;
6602
6603 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6604 "lbw: %llu inode %lu\n",
6605 data->task.tk_pid, sync,
6606 data->args.lastbytewritten,
6607 data->args.inode->i_ino);
6608
9d12b216 6609 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6610 task = rpc_run_task(&task_setup_data);
6611 if (IS_ERR(task))
6612 return PTR_ERR(task);
ef311537 6613 if (sync == false)
863a3c6c
AA		 6614 goto out;
6615 status = nfs4_wait_for_completion_rpc_task(task);
6616 if (status != 0)
6617 goto out;
6618 status = task->tk_status;
6619out:
6620 dprintk("%s: status %d\n", __func__, status);
6621 rpc_put_task(task);
6622 return status;
6623}
fca78d6d
BS		 6624
6625static int
6626_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6627 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6628{
6629 struct nfs41_secinfo_no_name_args args = {
6630 .style = SECINFO_STYLE_CURRENT_FH,
6631 };
6632 struct nfs4_secinfo_res res = {
6633 .flavors = flavors,
6634 };
6635 struct rpc_message msg = {
6636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6637 .rpc_argp = &args,
6638 .rpc_resp = &res,
6639 };
6640 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6641}
6642
6643static int
6644nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6645 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6646{
6647 struct nfs4_exception exception = { };
6648 int err;
6649 do {
6650 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6651 switch (err) {
6652 case 0:
6653 case -NFS4ERR_WRONGSEC:
6654 case -NFS4ERR_NOTSUPP:
05e9cfb4 6655 goto out;
fca78d6d
BS		 6656 default:
6657 err = nfs4_handle_exception(server, err, &exception);
6658 }
6659 } while (exception.retry);
05e9cfb4 6660out:
fca78d6d
BS		 6661 return err;
6662}
6663
6664static int
6665nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6666 struct nfs_fsinfo *info)
6667{
6668 int err;
6669 struct page *page;
6670 rpc_authflavor_t flavor;
6671 struct nfs4_secinfo_flavors *flavors;
6672
6673 page = alloc_page(GFP_KERNEL);
6674 if (!page) {
6675 err = -ENOMEM;
6676 goto out;
6677 }
6678
6679 flavors = page_address(page);
6680 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6681
6682 /*
6683 * Fall back on "guess and check" method if
6684 * the server doesn't support SECINFO_NO_NAME
6685 */
6686 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6687 err = nfs4_find_root_sec(server, fhandle, info);
6688 goto out_freepage;
6689 }
6690 if (err)
6691 goto out_freepage;
6692
6693 flavor = nfs_find_best_sec(flavors);
6694 if (err == 0)
6695 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6696
6697out_freepage:
6698 put_page(page);
6699 if (err == -EACCES)
6700 return -EPERM;
6701out:
6702 return err;
6703}
1cab0652
BS		 6704
6705static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6706{
6707 int status;
6708 struct nfs41_test_stateid_args args = {
1cab0652 6709 .stateid = stateid,
7d974794
BS		 6710 };
6711 struct nfs41_test_stateid_res res;
6712 struct rpc_message msg = {
6713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6714 .rpc_argp = &args,
6715 .rpc_resp = &res,
6716 };
1cab0652 6717
38527b15 6718 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6719 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6720 nfs4_set_sequence_privileged(&args.seq_args);
6721 status = nfs4_call_sync_sequence(server->client, server, &msg,
6722 &args.seq_args, &res.seq_res);
38527b15
CL		 6723 if (status != NFS_OK) {
6724 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6725 return status;
38527b15
CL		 6726 }
6727 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6728 return -res.status;
7d974794
BS		 6729}
6730
38527b15
CL		 6731/**
6732 * nfs41_test_stateid - perform a TEST_STATEID operation
6733 *
6734 * @server: server / transport on which to perform the operation
6735 * @stateid: state ID to test
6736 *
6737 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6738 * Otherwise a negative NFS4ERR value is returned if the operation
6739 * failed or the state ID is not currently valid.
6740 */
1cab0652 6741static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6742{
6743 struct nfs4_exception exception = { };
6744 int err;
6745 do {
377e507d
CL		 6746 err = _nfs41_test_stateid(server, stateid);
6747 if (err != -NFS4ERR_DELAY)
6748 break;
6749 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6750 } while (exception.retry);
6751 return err;
6752}
9aeda35f 6753
1cab0652 6754static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6755{
9aeda35f 6756 struct nfs41_free_stateid_args args = {
1cab0652 6757 .stateid = stateid,
9aeda35f
BS		 6758 };
6759 struct nfs41_free_stateid_res res;
6760 struct rpc_message msg = {
6761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6762 .rpc_argp = &args,
6763 .rpc_resp = &res,
6764 };
38527b15 6765 int status;
9aeda35f 6766
38527b15 6767 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6768 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6769 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6770 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6771 &args.seq_args, &res.seq_res);
38527b15
CL		 6772 dprintk("NFS reply free_stateid: %d\n", status);
6773 return status;
9aeda35f
BS		 6774}
6775
38527b15
CL		 6776/**
6777 * nfs41_free_stateid - perform a FREE_STATEID operation
6778 *
6779 * @server: server / transport on which to perform the operation
6780 * @stateid: state ID to release
6781 *
6782 * Returns NFS_OK if the server freed "stateid". Otherwise a
6783 * negative NFS4ERR value is returned.
6784 */
1cab0652 6785static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6786{
6787 struct nfs4_exception exception = { };
6788 int err;
6789 do {
377e507d
CL		 6790 err = _nfs4_free_stateid(server, stateid);
6791 if (err != -NFS4ERR_DELAY)
6792 break;
6793 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6794 } while (exception.retry);
6795 return err;
6796}
36281caa
TM		 6797
6798static bool nfs41_match_stateid(const nfs4_stateid *s1,
6799 const nfs4_stateid *s2)
6800{
2d2f24ad 6801 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6802 return false;
6803
2d2f24ad 6804 if (s1->seqid == s2->seqid)
36281caa 6805 return true;
2d2f24ad 6806 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6807 return true;
6808
6809 return false;
6810}
6811
557134a3
AA		 6812#endif /* CONFIG_NFS_V4_1 */
6813
36281caa
TM		 6814static bool nfs4_match_stateid(const nfs4_stateid *s1,
6815 const nfs4_stateid *s2)
6816{
f597c537 6817 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6818}
6819
6820
17280175 6821static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6822 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6823 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6824 .recover_open = nfs4_open_reclaim,
6825 .recover_lock = nfs4_lock_reclaim,
591d71cb 6826 .establish_clid = nfs4_init_clientid,
90a16617 6827 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6828 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6829};
6830
591d71cb 6831#if defined(CONFIG_NFS_V4_1)
17280175 6832static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6833 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6834 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6835 .recover_open = nfs4_open_reclaim,
6836 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6837 .establish_clid = nfs41_init_clientid,
b4b82607 6838 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6839 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6840 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6841};
6842#endif /* CONFIG_NFS_V4_1 */
6843
17280175 6844static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6845 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6846 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6847 .recover_open = nfs4_open_expired,
6848 .recover_lock = nfs4_lock_expired,
6849 .establish_clid = nfs4_init_clientid,
90a16617 6850 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6851};
6852
6853#if defined(CONFIG_NFS_V4_1)
17280175 6854static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6855 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6856 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6857 .recover_open = nfs41_open_expired,
6858 .recover_lock = nfs41_lock_expired,
4d643d1d 6859 .establish_clid = nfs41_init_clientid,
b4b82607 6860 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6861};
591d71cb 6862#endif /* CONFIG_NFS_V4_1 */
1da177e4 6863
17280175 6864static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6865 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6866 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6867 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6868};
6869
6870#if defined(CONFIG_NFS_V4_1)
17280175 6871static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6872 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6873 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6874 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6875};
6876#endif
6877
97dc1359
TM		 6878static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6879 .minor_version = 0,
39c6daae
TM		 6880 .init_caps = NFS_CAP_READDIRPLUS
6881 | NFS_CAP_ATOMIC_OPEN
6882 | NFS_CAP_CHANGE_ATTR
6883 | NFS_CAP_POSIX_LOCK,
97dc1359 6884 .call_sync = _nfs4_call_sync,
36281caa 6885 .match_stateid = nfs4_match_stateid,
fca78d6d 6886 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6887 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6888 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6889 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6890};
6891
6892#if defined(CONFIG_NFS_V4_1)
6893static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6894 .minor_version = 1,
39c6daae
TM		 6895 .init_caps = NFS_CAP_READDIRPLUS
6896 | NFS_CAP_ATOMIC_OPEN
6897 | NFS_CAP_CHANGE_ATTR
3b66486c 6898 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6899 | NFS_CAP_STATEID_NFSV41
6900 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6901 .call_sync = nfs4_call_sync_sequence,
36281caa 6902 .match_stateid = nfs41_match_stateid,
fca78d6d 6903 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6904 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6905 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6906 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6907};
6908#endif
6909
97dc1359
TM		 6910const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6911 [0] = &nfs_v4_0_minor_ops,
6912#if defined(CONFIG_NFS_V4_1)
6913 [1] = &nfs_v4_1_minor_ops,
6914#endif
6915};
6916
73a79706
BS		 6917const struct inode_operations nfs4_dir_inode_operations = {
6918 .create = nfs_create,
6919 .lookup = nfs_lookup,
6920 .atomic_open = nfs_atomic_open,
6921 .link = nfs_link,
6922 .unlink = nfs_unlink,
6923 .symlink = nfs_symlink,
6924 .mkdir = nfs_mkdir,
6925 .rmdir = nfs_rmdir,
6926 .mknod = nfs_mknod,
6927 .rename = nfs_rename,
6928 .permission = nfs_permission,
6929 .getattr = nfs_getattr,
6930 .setattr = nfs_setattr,
6931 .getxattr = generic_getxattr,
6932 .setxattr = generic_setxattr,
6933 .listxattr = generic_listxattr,
6934 .removexattr = generic_removexattr,
6935};
6936
92e1d5be 6937static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6938 .permission = nfs_permission,
6939 .getattr = nfs_getattr,
6940 .setattr = nfs_setattr,
64c2ce8b
AK		 6941 .getxattr = generic_getxattr,
6942 .setxattr = generic_setxattr,
6943 .listxattr = generic_listxattr,
6944 .removexattr = generic_removexattr,
6b3b5496
BF		 6945};
6946
509de811 6947const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6948 .version = 4, /* protocol version */
6949 .dentry_ops = &nfs4_dentry_operations,
6950 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6951 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6952 .file_ops = &nfs4_file_operations,
1da177e4 6953 .getroot = nfs4_proc_get_root,
281cad46 6954 .submount = nfs4_submount,
ff9099f2 6955 .try_mount = nfs4_try_mount,
1da177e4
LT		 6956 .getattr = nfs4_proc_getattr,
6957 .setattr = nfs4_proc_setattr,
6958 .lookup = nfs4_proc_lookup,
6959 .access = nfs4_proc_access,
6960 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6961 .create = nfs4_proc_create,
6962 .remove = nfs4_proc_remove,
6963 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6964 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6965 .unlink_done = nfs4_proc_unlink_done,
6966 .rename = nfs4_proc_rename,
d3d4152a 6967 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6968 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6969 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6970 .link = nfs4_proc_link,
6971 .symlink = nfs4_proc_symlink,
6972 .mkdir = nfs4_proc_mkdir,
6973 .rmdir = nfs4_proc_remove,
6974 .readdir = nfs4_proc_readdir,
6975 .mknod = nfs4_proc_mknod,
6976 .statfs = nfs4_proc_statfs,
6977 .fsinfo = nfs4_proc_fsinfo,
6978 .pathconf = nfs4_proc_pathconf,
e9326dca 6979 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6980 .decode_dirent = nfs4_decode_dirent,
6981 .read_setup = nfs4_proc_read_setup,
1abb5088 6982 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6983 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6984 .read_done = nfs4_read_done,
1da177e4 6985 .write_setup = nfs4_proc_write_setup,
57208fa7 6986 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6987 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6988 .write_done = nfs4_write_done,
1da177e4 6989 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6990 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6991 .commit_done = nfs4_commit_done,
1da177e4 6992 .lock = nfs4_proc_lock,
e50a1c2e 6993 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6994 .close_context = nfs4_close_context,
2b484297 6995 .open_context = nfs4_atomic_open,
011e2a7f 6996 .have_delegation = nfs4_have_delegation,
57ec14c5 6997 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6998 .alloc_client = nfs4_alloc_client,
45a52a02 6999 .init_client = nfs4_init_client,
cdb7eced 7000 .free_client = nfs4_free_client,
1179acc6
BS		 7001 .create_server = nfs4_create_server,
7002 .clone_server = nfs_clone_server,
1da177e4
LT		 7003};
7004
64c2ce8b
AK		 7005static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7006 .prefix = XATTR_NAME_NFSV4_ACL,
7007 .list = nfs4_xattr_list_nfs4_acl,
7008 .get = nfs4_xattr_get_nfs4_acl,
7009 .set = nfs4_xattr_set_nfs4_acl,
7010};
7011
7012const struct xattr_handler *nfs4_xattr_handlers[] = {
7013 &nfs4_xattr_nfs4_acl_handler,
7014 NULL
7015};
7016
1da177e4
LT		 7017/*
7018 * Local variables:
7019 * c-basic-offset: 8
7020 * End:
7021 */
Linux 6.x block layer and io_uring tree(s)