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NFSv4.1: Ensure that test_stateid and free_stateid use correct credentials
[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
ab7cb0df
TM		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
87 struct rpc_cred *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
89 struct rpc_cred *);
f062eb6c 90#endif
1da177e4 91/* Prevent leaks of NFSv4 errors into userland */
46f72f57 92static int nfs4_map_errors(int err)
1da177e4 93{
52567b03
TM		 94 if (err >= -1000)
95 return err;
96 switch (err) {
97 case -NFS4ERR_RESOURCE:
30005121
WAA		 98 case -NFS4ERR_LAYOUTTRYLATER:
99 case -NFS4ERR_RECALLCONFLICT:
52567b03 100 return -EREMOTEIO;
7ebb9315
BS		 101 case -NFS4ERR_WRONGSEC:
102 return -EPERM;
3ddeb7c5
TM		 103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
105 return -EINVAL;
fb13bfa7
TM		 106 case -NFS4ERR_SHARE_DENIED:
107 return -EACCES;
f25efd85
SD		 108 case -NFS4ERR_MINOR_VERS_MISMATCH:
109 return -EPROTONOSUPPORT;
6168f62c
WAA		 110 case -NFS4ERR_ACCESS:
111 return -EACCES;
6e3cf241
TM		 112 case -NFS4ERR_FILE_OPEN:
113 return -EBUSY;
52567b03 114 default:
1da177e4 115 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 116 __func__, -err);
52567b03 117 break;
1da177e4 118 }
52567b03 119 return -EIO;
1da177e4
LT		 120}
121
122/*
123 * This is our standard bitmap for GETATTR requests.
124 */
1549210f 125const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 126 FATTR4_WORD0_TYPE
127 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_SIZE
129 | FATTR4_WORD0_FSID
130 | FATTR4_WORD0_FILEID,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140};
141
1549210f
TM		 142static const u32 nfs4_pnfs_open_bitmap[3] = {
143 FATTR4_WORD0_TYPE
144 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_SIZE
146 | FATTR4_WORD0_FSID
147 | FATTR4_WORD0_FILEID,
148 FATTR4_WORD1_MODE
149 | FATTR4_WORD1_NUMLINKS
150 | FATTR4_WORD1_OWNER
151 | FATTR4_WORD1_OWNER_GROUP
152 | FATTR4_WORD1_RAWDEV
153 | FATTR4_WORD1_SPACE_USED
154 | FATTR4_WORD1_TIME_ACCESS
155 | FATTR4_WORD1_TIME_METADATA
156 | FATTR4_WORD1_TIME_MODIFY,
157 FATTR4_WORD2_MDSTHRESHOLD
158};
159
e23008ec
AA		 160static const u32 nfs4_open_noattr_bitmap[3] = {
161 FATTR4_WORD0_TYPE
162 | FATTR4_WORD0_CHANGE
163 | FATTR4_WORD0_FILEID,
164};
165
1da177e4
LT		 166const u32 nfs4_statfs_bitmap[2] = {
167 FATTR4_WORD0_FILES_AVAIL
168 | FATTR4_WORD0_FILES_FREE
169 | FATTR4_WORD0_FILES_TOTAL,
170 FATTR4_WORD1_SPACE_AVAIL
171 | FATTR4_WORD1_SPACE_FREE
172 | FATTR4_WORD1_SPACE_TOTAL
173};
174
4ce79717 175const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 176 FATTR4_WORD0_MAXLINK
177 | FATTR4_WORD0_MAXNAME,
178 0
179};
180
dae100c2 181const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 182 | FATTR4_WORD0_MAXREAD
183 | FATTR4_WORD0_MAXWRITE
184 | FATTR4_WORD0_LEASE_TIME,
55b6e774 185 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 186 | FATTR4_WORD1_FS_LAYOUT_TYPES,
187 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 188};
189
830b8e33
MN		 190const u32 nfs4_fs_locations_bitmap[2] = {
191 FATTR4_WORD0_TYPE
192 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_SIZE
194 | FATTR4_WORD0_FSID
195 | FATTR4_WORD0_FILEID
196 | FATTR4_WORD0_FS_LOCATIONS,
197 FATTR4_WORD1_MODE
198 | FATTR4_WORD1_NUMLINKS
199 | FATTR4_WORD1_OWNER
200 | FATTR4_WORD1_OWNER_GROUP
201 | FATTR4_WORD1_RAWDEV
202 | FATTR4_WORD1_SPACE_USED
203 | FATTR4_WORD1_TIME_ACCESS
204 | FATTR4_WORD1_TIME_METADATA
205 | FATTR4_WORD1_TIME_MODIFY
206 | FATTR4_WORD1_MOUNTED_ON_FILEID
207};
208
bc4785cd 209static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 210 struct nfs4_readdir_arg *readdir)
211{
0dbb4c67 212 __be32 *start, *p;
1da177e4 213
1da177e4 214 if (cookie > 2) {
b7ef1956 215 readdir->cookie = cookie;
1da177e4
LT		 216 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
217 return;
218 }
219
220 readdir->cookie = 0;
221 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
222 if (cookie == 2)
223 return;
224
225 /*
226 * NFSv4 servers do not return entries for '.' and '..'
227 * Therefore, we fake these entries here. We let '.'
228 * have cookie 0 and '..' have cookie 1. Note that
229 * when talking to the server, we always send cookie 0
230 * instead of 1 or 2.
231 */
2b86ce2d 232 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 233
234 if (cookie == 0) {
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_one; /* cookie, second word */
238 *p++ = xdr_one; /* entry len */
239 memcpy(p, ".\0\0\0", 4); /* entry */
240 p++;
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
4e769b93 244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 245 }
246
247 *p++ = xdr_one; /* next */
248 *p++ = xdr_zero; /* cookie, first word */
249 *p++ = xdr_two; /* cookie, second word */
250 *p++ = xdr_two; /* entry len */
251 memcpy(p, "..\0\0", 4); /* entry */
252 p++;
253 *p++ = xdr_one; /* bitmap length */
254 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
255 *p++ = htonl(8); /* attribute buffer length */
4e769b93 256 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 257
258 readdir->pgbase = (char *)p - (char *)start;
259 readdir->count -= readdir->pgbase;
2b86ce2d 260 kunmap_atomic(start);
1da177e4
LT		 261}
262
65de872e
TM		 263static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
264{
265 int res = 0;
266
267 might_sleep();
268
269 if (*timeout <= 0)
270 *timeout = NFS4_POLL_RETRY_MIN;
271 if (*timeout > NFS4_POLL_RETRY_MAX)
272 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 273 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 274 if (fatal_signal_pending(current))
275 res = -ERESTARTSYS;
276 *timeout <<= 1;
277 return res;
278}
279
280/* This is the error handling routine for processes that are allowed
281 * to sleep.
282 */
b064eca2 283static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 284{
285 struct nfs_client *clp = server->nfs_client;
9e33bed5 286 struct nfs4_state *state = exception->state;
3114ea7a 287 struct inode *inode = exception->inode;
65de872e
TM		 288 int ret = errorcode;
289
290 exception->retry = 0;
291 switch(errorcode) {
292 case 0:
293 return 0;
3114ea7a 294 case -NFS4ERR_OPENMODE:
011e2a7f 295 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 296 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 297 exception->retry = 1;
298 return 0;
299 }
300 if (state == NULL)
301 break;
5d422301
TM		 302 ret = nfs4_schedule_stateid_recovery(server, state);
303 if (ret < 0)
304 break;
3114ea7a 305 goto wait_on_recovery;
a1d0b5ee 306 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 307 case -NFS4ERR_ADMIN_REVOKED:
308 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 309 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
310 nfs_remove_bad_delegation(inode);
311 exception->retry = 1;
312 break;
313 }
9e33bed5
TM		 314 if (state == NULL)
315 break;
5d422301
TM		 316 ret = nfs4_schedule_stateid_recovery(server, state);
317 if (ret < 0)
318 break;
0400a6b0 319 goto wait_on_recovery;
0ced63d1 320 case -NFS4ERR_EXPIRED:
5d422301
TM		 321 if (state != NULL) {
322 ret = nfs4_schedule_stateid_recovery(server, state);
323 if (ret < 0)
324 break;
325 }
65de872e 326 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 327 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
03391693 330#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
339 errorcode);
9f594791 340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 341 goto wait_on_recovery;
03391693 342#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 343 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
346 * fail
347 */
348 ret = -EBUSY;
349 break;
350 }
65de872e
TM		 351 case -NFS4ERR_GRACE:
352 case -NFS4ERR_DELAY:
353 ret = nfs4_delay(server->client, &exception->timeout);
354 if (ret != 0)
355 break;
a8a4ae3a 356 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 357 case -NFS4ERR_OLD_STATEID:
358 exception->retry = 1;
b064eca2
TM		 359 break;
360 case -NFS4ERR_BADOWNER:
361 /* The following works around a Linux server bug! */
362 case -NFS4ERR_BADNAME:
363 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
364 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
365 exception->retry = 1;
366 printk(KERN_WARNING "NFS: v4 server %s "
367 "does not accept raw "
368 "uid/gids. "
369 "Reenabling the idmapper.\n",
370 server->nfs_client->cl_hostname);
371 }
65de872e
TM		 372 }
373 /* We failed to handle the error */
374 return nfs4_map_errors(ret);
0400a6b0 375wait_on_recovery:
a2c0b9e2
TM		 376 ret = nfs4_wait_clnt_recover(clp);
377 if (ret == 0)
378 exception->retry = 1;
379 return ret;
65de872e
TM		 380}
381
382
452e9352 383static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 384{
1da177e4
LT		 385 spin_lock(&clp->cl_lock);
386 if (time_before(clp->cl_last_renewal,timestamp))
387 clp->cl_last_renewal = timestamp;
388 spin_unlock(&clp->cl_lock);
389}
390
452e9352
TM		 391static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
392{
393 do_renew_lease(server->nfs_client, timestamp);
394}
395
cccef3b9
AA		 396#if defined(CONFIG_NFS_V4_1)
397
d185a334 398static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 399{
e3725ec0 400 struct nfs4_session *session;
13615871 401 struct nfs4_slot_table *tbl;
c10e4498 402 bool send_new_highest_used_slotid = false;
13615871 403
dfb4f309 404 if (!res->sr_slot) {
13615871
AA		 405 /* just wake up the next guy waiting since
406 * we may have not consumed a slot after all */
691daf3b 407 dprintk("%s: No slot\n", __func__);
35dc1d74 408 return;
13615871 409 }
e3725ec0
TM		 410 tbl = res->sr_slot->table;
411 session = tbl->session;
ea028ac9 412
35dc1d74 413 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 414 /* Be nice to the server: try to ensure that the last transmitted
415 * value for highest_user_slotid <= target_highest_slotid
416 */
417 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
418 send_new_highest_used_slotid = true;
419
b75ad4cd
TM		 420 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
421 send_new_highest_used_slotid = false;
422 goto out_unlock;
423 }
f4af6e2a 424 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 425
426 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
427 send_new_highest_used_slotid = false;
b75ad4cd 428out_unlock:
35dc1d74 429 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 430 res->sr_slot = NULL;
c10e4498
TM		 431 if (send_new_highest_used_slotid)
432 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 433}
434
14516c3a 435static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 436{
e3725ec0 437 struct nfs4_session *session;
933602e3 438 struct nfs4_slot *slot;
14516c3a 439 struct nfs_client *clp;
ac20d163 440 bool interrupted = false;
85563073 441 int ret = 1;
b0df806c 442
468f8613
BS		 443 /* don't increment the sequence number if the task wasn't sent */
444 if (!RPC_WAS_SENT(task))
b0df806c
AA		 445 goto out;
446
933602e3 447 slot = res->sr_slot;
e3725ec0 448 session = slot->table->session;
933602e3 449
ac20d163
TM		 450 if (slot->interrupted) {
451 slot->interrupted = 0;
452 interrupted = true;
453 }
454
691daf3b 455 /* Check the SEQUENCE operation status */
14516c3a
TM		 456 switch (res->sr_status) {
457 case 0:
b0df806c 458 /* Update the slot's sequence and clientid lease timer */
933602e3 459 ++slot->seq_nr;
e3725ec0 460 clp = session->clp;
8e63b6a8 461 do_renew_lease(clp, res->sr_timestamp);
0629e370 462 /* Check sequence flags */
b4410c2f
TM		 463 if (res->sr_status_flags != 0)
464 nfs4_schedule_lease_recovery(clp);
464ee9f9 465 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 466 break;
ac20d163
TM		 467 case 1:
468 /*
469 * sr_status remains 1 if an RPC level error occurred.
470 * The server may or may not have processed the sequence
471 * operation..
472 * Mark the slot as having hosted an interrupted RPC call.
473 */
474 slot->interrupted = 1;
475 goto out;
14516c3a
TM		 476 case -NFS4ERR_DELAY:
477 /* The server detected a resend of the RPC call and
478 * returned NFS4ERR_DELAY as per Section 2.10.6.2
479 * of RFC5661.
480 */
df2fabff 481 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 482 __func__,
df2fabff 483 slot->slot_nr,
933602e3 484 slot->seq_nr);
14516c3a 485 goto out_retry;
85563073
TM		 486 case -NFS4ERR_BADSLOT:
487 /*
488 * The slot id we used was probably retired. Try again
489 * using a different slot id.
490 */
e8794440
TM		 491 goto retry_nowait;
492 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 493 /*
494 * Was the last operation on this sequence interrupted?
495 * If so, retry after bumping the sequence number.
496 */
497 if (interrupted) {
498 ++slot->seq_nr;
499 goto retry_nowait;
500 }
e8794440
TM		 501 /*
502 * Could this slot have been previously retired?
503 * If so, then the server may be expecting seq_nr = 1!
504 */
8e63b6a8
TM		 505 if (slot->seq_nr != 1) {
506 slot->seq_nr = 1;
507 goto retry_nowait;
508 }
509 break;
e8794440
TM		 510 case -NFS4ERR_SEQ_FALSE_RETRY:
511 ++slot->seq_nr;
512 goto retry_nowait;
14516c3a
TM		 513 default:
514 /* Just update the slot sequence no. */
933602e3 515 ++slot->seq_nr;
b0df806c
AA		 516 }
517out:
518 /* The session may be reset by one of the error handlers. */
519 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 520 nfs41_sequence_free_slot(res);
85563073 521 return ret;
e8794440
TM		 522retry_nowait:
523 if (rpc_restart_call_prepare(task)) {
524 task->tk_status = 0;
525 ret = 0;
526 }
527 goto out;
14516c3a 528out_retry:
d05dd4e9 529 if (!rpc_restart_call(task))
14516c3a
TM		 530 goto out;
531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
532 return 0;
b0df806c
AA		 533}
534
14516c3a
TM		 535static int nfs4_sequence_done(struct rpc_task *task,
536 struct nfs4_sequence_res *res)
df896455 537{
e3725ec0 538 if (res->sr_slot == NULL)
14516c3a
TM		 539 return 1;
540 return nfs41_sequence_done(task, res);
df896455
TM		 541}
542
9d12b216
TM		 543static void nfs41_init_sequence(struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res, int cache_reply)
545{
2b2fa717 546 args->sa_slot = NULL;
9d12b216 547 args->sa_cache_this = 0;
8fe72bac 548 args->sa_privileged = 0;
9d12b216
TM		 549 if (cache_reply)
550 args->sa_cache_this = 1;
9d12b216
TM		 551 res->sr_slot = NULL;
552}
553
8fe72bac
TM		 554static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
555{
556 args->sa_privileged = 1;
557}
558
dc70d7b3 559int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 560 struct nfs4_sequence_args *args,
561 struct nfs4_sequence_res *res,
ce5039c1
AA		 562 struct rpc_task *task)
563{
fbcd4abc
AA		 564 struct nfs4_slot *slot;
565 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 566
567 dprintk("--> %s\n", __func__);
ce5039c1 568 /* slot already allocated? */
dfb4f309 569 if (res->sr_slot != NULL)
d9afbd1b 570 goto out_success;
ce5039c1 571
fbcd4abc
AA		 572 tbl = &session->fc_slot_table;
573
69d206b5
TM		 574 task->tk_timeout = 0;
575
fbcd4abc 576 spin_lock(&tbl->slot_tbl_lock);
774d5f14 577 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 578 !args->sa_privileged) {
0b1c8fc4 579 /* The state manager will wait until the slot table is empty */
0b1c8fc4 580 dprintk("%s session is draining\n", __func__);
7b939a3f 581 goto out_sleep;
689cf5c1
AB		 582 }
583
2dc03b7f 584 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 585 if (IS_ERR(slot)) {
586 /* If out of memory, try again in 1/4 second */
587 if (slot == ERR_PTR(-ENOMEM))
588 task->tk_timeout = HZ >> 2;
fbcd4abc 589 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 590 goto out_sleep;
fbcd4abc
AA		 591 }
592 spin_unlock(&tbl->slot_tbl_lock);
593
2b2fa717 594 args->sa_slot = slot;
fbcd4abc 595
2dc03b7f
TM		 596 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
597 slot->slot_nr, slot->seq_nr);
fbcd4abc 598
dfb4f309 599 res->sr_slot = slot;
8e63b6a8 600 res->sr_timestamp = jiffies;
2a6e26cd 601 res->sr_status_flags = 0;
fbcd4abc
AA		 602 /*
603 * sr_status is only set in decode_sequence, and so will remain
604 * set to 1 if an rpc level failure occurs.
605 */
606 res->sr_status = 1;
d9afbd1b
TM		 607out_success:
608 rpc_call_start(task);
ce5039c1 609 return 0;
7b939a3f 610out_sleep:
8fe72bac
TM		 611 /* Privileged tasks are queued with top priority */
612 if (args->sa_privileged)
1e1093c7
TM		 613 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
614 NULL, RPC_PRIORITY_PRIVILEGED);
615 else
616 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 617 spin_unlock(&tbl->slot_tbl_lock);
618 return -EAGAIN;
ce5039c1 619}
dc70d7b3 620EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 621
035168ab 622int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 623 struct nfs4_sequence_args *args,
624 struct nfs4_sequence_res *res,
ce5039c1
AA		 625 struct rpc_task *task)
626{
035168ab 627 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 628 int ret = 0;
629
d9afbd1b
TM		 630 if (session == NULL) {
631 rpc_call_start(task);
035168ab 632 goto out;
d9afbd1b 633 }
035168ab 634
df2fabff 635 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 636 __func__, session->clp, session, res->sr_slot ?
df2fabff 637 res->sr_slot->slot_nr : -1);
ce5039c1 638
9d12b216 639 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 640out:
641 dprintk("<-- %s status=%d\n", __func__, ret);
642 return ret;
643}
644
645struct nfs41_call_sync_data {
035168ab 646 const struct nfs_server *seq_server;
ce5039c1
AA		 647 struct nfs4_sequence_args *seq_args;
648 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 649};
650
651static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
652{
653 struct nfs41_call_sync_data *data = calldata;
6ba7db34 654 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 655
035168ab
TM		 656 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
657
d9afbd1b 658 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 659}
660
69ab40c4
AA		 661static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
662{
663 struct nfs41_call_sync_data *data = calldata;
664
14516c3a 665 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 666}
667
17280175 668static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 669 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 670 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 671};
672
7c513058
BS		 673static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
674 struct nfs_server *server,
ce5039c1
AA		 675 struct rpc_message *msg,
676 struct nfs4_sequence_args *args,
8fe72bac 677 struct nfs4_sequence_res *res)
ce5039c1
AA		 678{
679 int ret;
680 struct rpc_task *task;
681 struct nfs41_call_sync_data data = {
035168ab 682 .seq_server = server,
ce5039c1
AA		 683 .seq_args = args,
684 .seq_res = res,
ce5039c1
AA		 685 };
686 struct rpc_task_setup task_setup = {
7c513058 687 .rpc_client = clnt,
ce5039c1
AA		 688 .rpc_message = msg,
689 .callback_ops = &nfs41_call_sync_ops,
690 .callback_data = &data
691 };
692
ce5039c1
AA		 693 task = rpc_run_task(&task_setup);
694 if (IS_ERR(task))
695 ret = PTR_ERR(task);
696 else {
697 ret = task->tk_status;
698 rpc_put_task(task);
699 }
700 return ret;
701}
702
df896455 703#else
8fe72bac 704static
9d12b216
TM		 705void nfs41_init_sequence(struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res, int cache_reply)
707{
708}
709
8fe72bac
TM		 710static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
711{
712}
713
714
14516c3a
TM		 715static int nfs4_sequence_done(struct rpc_task *task,
716 struct nfs4_sequence_res *res)
df896455 717{
14516c3a 718 return 1;
df896455 719}
cccef3b9
AA		 720#endif /* CONFIG_NFS_V4_1 */
721
fd0c0953 722static
7c513058
BS		 723int _nfs4_call_sync(struct rpc_clnt *clnt,
724 struct nfs_server *server,
cccef3b9
AA		 725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
fd0c0953 727 struct nfs4_sequence_res *res)
cccef3b9 728{
7c513058 729 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 730}
731
fd0c0953 732static
7c513058
BS		 733int nfs4_call_sync(struct rpc_clnt *clnt,
734 struct nfs_server *server,
e73b83f2
BS		 735 struct rpc_message *msg,
736 struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res,
738 int cache_reply)
739{
fd0c0953 740 nfs41_init_sequence(args, res, cache_reply);
7c513058 741 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 742 args, res);
e73b83f2 743}
cccef3b9 744
38478b24 745static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 746{
38478b24 747 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 748
38478b24 749 spin_lock(&dir->i_lock);
359d7d1c 750 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 751 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 752 nfs_force_lookup_revalidate(dir);
a9a4a87a 753 dir->i_version = cinfo->after;
de242c0b 754 nfs_fscache_invalidate(dir);
38478b24 755 spin_unlock(&dir->i_lock);
1da177e4
LT		 756}
757
e56e0b78 758struct nfs4_opendata {
c6d00e63 759 struct kref kref;
e56e0b78
TM		 760 struct nfs_openargs o_arg;
761 struct nfs_openres o_res;
cdd4e68b
TM		 762 struct nfs_open_confirmargs c_arg;
763 struct nfs_open_confirmres c_res;
6926afd1
TM		 764 struct nfs4_string owner_name;
765 struct nfs4_string group_name;
e56e0b78 766 struct nfs_fattr f_attr;
e56e0b78 767 struct dentry *dir;
82a2c1b7 768 struct dentry *dentry;
e56e0b78 769 struct nfs4_state_owner *owner;
aac00a8d 770 struct nfs4_state *state;
e56e0b78 771 struct iattr attrs;
26e976a8 772 unsigned long timestamp;
3e309914 773 unsigned int rpc_done : 1;
bdeca1b7 774 unsigned int is_recover : 1;
24ac23ab
TM		 775 int rpc_status;
776 int cancelled;
e56e0b78
TM		 777};
778
49f9a0fa
TM		 779static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
780 int err, struct nfs4_exception *exception)
781{
782 if (err != -EINVAL)
783 return false;
784 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
785 return false;
786 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
787 exception->retry = 1;
788 return true;
789}
790
791static enum open_claim_type4
792nfs4_map_atomic_open_claim(struct nfs_server *server,
793 enum open_claim_type4 claim)
794{
795 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
796 return claim;
797 switch (claim) {
798 default:
799 return claim;
800 case NFS4_OPEN_CLAIM_FH:
801 return NFS4_OPEN_CLAIM_NULL;
802 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
804 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
805 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
806 }
807}
2ced46c2
TM		 808
809static void nfs4_init_opendata_res(struct nfs4_opendata *p)
810{
811 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 812 p->o_res.seqid = p->o_arg.seqid;
813 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 814 p->o_res.server = p->o_arg.server;
5f657530 815 p->o_res.access_request = p->o_arg.access;
2ced46c2 816 nfs_fattr_init(&p->f_attr);
6926afd1 817 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 818}
819
82a2c1b7 820static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 821 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 822 const struct iattr *attrs,
4a1c0893 823 enum open_claim_type4 claim,
8535b2be 824 gfp_t gfp_mask)
e56e0b78 825{
82a2c1b7 826 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 827 struct inode *dir = parent->d_inode;
828 struct nfs_server *server = NFS_SERVER(dir);
829 struct nfs4_opendata *p;
830
8535b2be 831 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 832 if (p == NULL)
833 goto err;
8535b2be 834 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 835 if (p->o_arg.seqid == NULL)
836 goto err_free;
82a2c1b7
AV		 837 nfs_sb_active(dentry->d_sb);
838 p->dentry = dget(dentry);
e56e0b78
TM		 839 p->dir = parent;
840 p->owner = sp;
841 atomic_inc(&sp->so_count);
dc0b027d
TM		 842 p->o_arg.open_flags = flags;
843 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 844 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
845 * will return permission denied for all bits until close */
846 if (!(flags & O_EXCL)) {
847 /* ask server to check for all possible rights as results
848 * are cached */
849 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
850 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 851 }
7539bbab 852 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 853 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
854 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 855 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 856 p->o_arg.server = server;
857 p->o_arg.bitmask = server->attr_bitmask;
1549210f 858 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 859 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
860 switch (p->o_arg.claim) {
4a1c0893
TM		 861 case NFS4_OPEN_CLAIM_NULL:
862 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
863 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
864 p->o_arg.fh = NFS_FH(dir);
865 break;
866 case NFS4_OPEN_CLAIM_PREVIOUS:
867 case NFS4_OPEN_CLAIM_FH:
868 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
869 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
870 p->o_arg.fh = NFS_FH(dentry->d_inode);
871 }
536e43d1 872 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 873 __be32 verf[2];
d77d76ff 874
e56e0b78
TM		 875 p->o_arg.u.attrs = &p->attrs;
876 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 877
878 verf[0] = jiffies;
879 verf[1] = current->pid;
880 memcpy(p->o_arg.u.verifier.data, verf,
881 sizeof(p->o_arg.u.verifier.data));
e56e0b78 882 }
cdd4e68b
TM		 883 p->c_arg.fh = &p->o_res.fh;
884 p->c_arg.stateid = &p->o_res.stateid;
885 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 886 nfs4_init_opendata_res(p);
c6d00e63 887 kref_init(&p->kref);
e56e0b78
TM		 888 return p;
889err_free:
890 kfree(p);
891err:
892 dput(parent);
893 return NULL;
894}
895
c6d00e63 896static void nfs4_opendata_free(struct kref *kref)
e56e0b78 897{
c6d00e63
TM		 898 struct nfs4_opendata *p = container_of(kref,
899 struct nfs4_opendata, kref);
82a2c1b7 900 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 901
902 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 903 if (p->state != NULL)
904 nfs4_put_open_state(p->state);
c6d00e63
TM		 905 nfs4_put_state_owner(p->owner);
906 dput(p->dir);
82a2c1b7
AV		 907 dput(p->dentry);
908 nfs_sb_deactive(sb);
6926afd1 909 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 910 kfree(p);
911}
912
913static void nfs4_opendata_put(struct nfs4_opendata *p)
914{
915 if (p != NULL)
916 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 917}
918
06f814a3
TM		 919static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
920{
06f814a3
TM		 921 int ret;
922
06f814a3 923 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 924 return ret;
925}
926
dc0b027d 927static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 928{
929 int ret = 0;
dc0b027d 930
536e43d1 931 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 932 goto out;
933 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 934 case FMODE_READ:
88069f77
TM		 935 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
936 && state->n_rdonly != 0;
6ee41268
TM		 937 break;
938 case FMODE_WRITE:
88069f77
TM		 939 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
940 && state->n_wronly != 0;
6ee41268
TM		 941 break;
942 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 943 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
944 && state->n_rdwr != 0;
6ee41268 945 }
dc0b027d 946out:
6ee41268
TM		 947 return ret;
948}
949
dc0b027d 950static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 951{
652f89f6
TM		 952 if (delegation == NULL)
953 return 0;
dc0b027d 954 if ((delegation->type & fmode) != fmode)
aac00a8d 955 return 0;
15c831bf 956 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 957 return 0;
d25be546
TM		 958 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
959 return 0;
b7391f44 960 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 961 return 1;
962}
963
dc0b027d 964static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 965{
dc0b027d 966 switch (fmode) {
e7616923
TM		 967 case FMODE_WRITE:
968 state->n_wronly++;
969 break;
970 case FMODE_READ:
971 state->n_rdonly++;
972 break;
973 case FMODE_READ|FMODE_WRITE:
974 state->n_rdwr++;
975 }
dc0b027d 976 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 977}
978
dc0b027d 979static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 980{
981 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 982 nfs4_stateid_copy(&state->stateid, stateid);
983 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 984 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 985 switch (fmode) {
003707c7
TM		 986 case FMODE_READ:
987 set_bit(NFS_O_RDONLY_STATE, &state->flags);
988 break;
989 case FMODE_WRITE:
990 set_bit(NFS_O_WRONLY_STATE, &state->flags);
991 break;
992 case FMODE_READ|FMODE_WRITE:
993 set_bit(NFS_O_RDWR_STATE, &state->flags);
994 }
e7616923
TM		 995}
996
dc0b027d 997static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 998{
8bda4e4c 999 write_seqlock(&state->seqlock);
dc0b027d 1000 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1001 write_sequnlock(&state->seqlock);
003707c7
TM		 1002}
1003
dc0b027d 1004static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1005{
8bda4e4c
TM		 1006 /*
1007 * Protect the call to nfs4_state_set_mode_locked and
1008 * serialise the stateid update
1009 */
1010 write_seqlock(&state->seqlock);
003707c7 1011 if (deleg_stateid != NULL) {
f597c537 1012 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1013 set_bit(NFS_DELEGATED_STATE, &state->flags);
1014 }
1015 if (open_stateid != NULL)
dc0b027d 1016 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1017 write_sequnlock(&state->seqlock);
1018 spin_lock(&state->owner->so_lock);
dc0b027d 1019 update_open_stateflags(state, fmode);
ec073428 1020 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1021}
1022
dc0b027d 1023static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1024{
1025 struct nfs_inode *nfsi = NFS_I(state->inode);
1026 struct nfs_delegation *deleg_cur;
1027 int ret = 0;
1028
dc0b027d 1029 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1030
1031 rcu_read_lock();
1032 deleg_cur = rcu_dereference(nfsi->delegation);
1033 if (deleg_cur == NULL)
1034 goto no_delegation;
1035
1036 spin_lock(&deleg_cur->lock);
1037 if (nfsi->delegation != deleg_cur ||
d25be546 1038 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1039 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1040 goto no_delegation_unlock;
1041
1042 if (delegation == NULL)
1043 delegation = &deleg_cur->stateid;
f597c537 1044 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1045 goto no_delegation_unlock;
1046
b7391f44 1047 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1048 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1049 ret = 1;
1050no_delegation_unlock:
1051 spin_unlock(&deleg_cur->lock);
1052no_delegation:
1053 rcu_read_unlock();
1054
1055 if (!ret && open_stateid != NULL) {
dc0b027d 1056 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1057 ret = 1;
1058 }
1059
1060 return ret;
1061}
1062
1063
dc0b027d 1064static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1065{
1066 struct nfs_delegation *delegation;
1067
1068 rcu_read_lock();
1069 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1070 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1071 rcu_read_unlock();
1072 return;
1073 }
1074 rcu_read_unlock();
57ec14c5 1075 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1076}
1077
6ee41268 1078static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1079{
1080 struct nfs4_state *state = opendata->state;
1081 struct nfs_inode *nfsi = NFS_I(state->inode);
1082 struct nfs_delegation *delegation;
f448badd 1083 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1084 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1085 nfs4_stateid stateid;
1086 int ret = -EAGAIN;
1087
aac00a8d 1088 for (;;) {
dc0b027d 1089 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1090 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1091 if (can_open_cached(state, fmode, open_mode)) {
1092 update_open_stateflags(state, fmode);
6ee41268 1093 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1094 goto out_return_state;
1095 }
1096 spin_unlock(&state->owner->so_lock);
1097 }
34310430
TM		 1098 rcu_read_lock();
1099 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1100 if (!can_open_delegated(delegation, fmode)) {
34310430 1101 rcu_read_unlock();
aac00a8d 1102 break;
34310430 1103 }
aac00a8d 1104 /* Save the delegation */
f597c537 1105 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1106 rcu_read_unlock();
fa332941 1107 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1108 if (!opendata->is_recover) {
1109 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1110 if (ret != 0)
1111 goto out;
1112 }
aac00a8d 1113 ret = -EAGAIN;
34310430
TM		 1114
1115 /* Try to update the stateid using the delegation */
dc0b027d 1116 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1117 goto out_return_state;
aac00a8d 1118 }
aac00a8d
TM		 1119out:
1120 return ERR_PTR(ret);
1121out_return_state:
1122 atomic_inc(&state->count);
1123 return state;
1124}
1125
e23008ec
AA		 1126static void
1127nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1128{
1129 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1130 struct nfs_delegation *delegation;
1131 int delegation_flags = 0;
1132
1133 rcu_read_lock();
1134 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1135 if (delegation)
1136 delegation_flags = delegation->flags;
1137 rcu_read_unlock();
1138 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1139 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1140 "returning a delegation for "
1141 "OPEN(CLAIM_DELEGATE_CUR)\n",
1142 clp->cl_hostname);
1143 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1144 nfs_inode_set_delegation(state->inode,
1145 data->owner->so_cred,
1146 &data->o_res);
1147 else
1148 nfs_inode_reclaim_delegation(state->inode,
1149 data->owner->so_cred,
1150 &data->o_res);
1151}
1152
1153/*
1154 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1155 * and update the nfs4_state.
1156 */
1157static struct nfs4_state *
1158_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1159{
1160 struct inode *inode = data->state->inode;
1161 struct nfs4_state *state = data->state;
1162 int ret;
1163
1164 if (!data->rpc_done) {
1165 ret = data->rpc_status;
1166 goto err;
1167 }
1168
1169 ret = -ESTALE;
1170 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1171 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1172 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1173 goto err;
1174
1175 ret = -ENOMEM;
1176 state = nfs4_get_open_state(inode, data->owner);
1177 if (state == NULL)
1178 goto err;
1179
1180 ret = nfs_refresh_inode(inode, &data->f_attr);
1181 if (ret)
1182 goto err;
1183
1184 if (data->o_res.delegation_type != 0)
1185 nfs4_opendata_check_deleg(data, state);
1186 update_open_stateid(state, &data->o_res.stateid, NULL,
1187 data->o_arg.fmode);
1188
1189 return state;
1190err:
1191 return ERR_PTR(ret);
1192
1193}
1194
1195static struct nfs4_state *
1196_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1197{
1198 struct inode *inode;
1199 struct nfs4_state *state = NULL;
1b370bc2 1200 int ret;
24ac23ab 1201
aac00a8d 1202 if (!data->rpc_done) {
6ee41268 1203 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1204 goto out;
1205 }
1206
1b370bc2 1207 ret = -EAGAIN;
24ac23ab 1208 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1209 goto err;
24ac23ab 1210 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1211 ret = PTR_ERR(inode);
03f28e3a 1212 if (IS_ERR(inode))
1b370bc2
TM		 1213 goto err;
1214 ret = -ENOMEM;
24ac23ab
TM		 1215 state = nfs4_get_open_state(inode, data->owner);
1216 if (state == NULL)
1b370bc2 1217 goto err_put_inode;
e23008ec
AA		 1218 if (data->o_res.delegation_type != 0)
1219 nfs4_opendata_check_deleg(data, state);
34310430 1220 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1221 data->o_arg.fmode);
24ac23ab 1222 iput(inode);
aac00a8d 1223out:
7aa262b5 1224 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1225 return state;
1b370bc2
TM		 1226err_put_inode:
1227 iput(inode);
1228err:
1229 return ERR_PTR(ret);
24ac23ab
TM		 1230}
1231
e23008ec
AA		 1232static struct nfs4_state *
1233nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1234{
1235 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1236 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1237 return _nfs4_opendata_to_nfs4_state(data);
1238}
1239
864472e9
TM		 1240static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1241{
1242 struct nfs_inode *nfsi = NFS_I(state->inode);
1243 struct nfs_open_context *ctx;
1244
1245 spin_lock(&state->inode->i_lock);
1246 list_for_each_entry(ctx, &nfsi->open_files, list) {
1247 if (ctx->state != state)
1248 continue;
1249 get_nfs_open_context(ctx);
1250 spin_unlock(&state->inode->i_lock);
1251 return ctx;
1252 }
1253 spin_unlock(&state->inode->i_lock);
1254 return ERR_PTR(-ENOENT);
1255}
1256
4a1c0893
TM		 1257static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1258 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1259{
1260 struct nfs4_opendata *opendata;
1261
4a1c0893
TM		 1262 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1263 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1264 if (opendata == NULL)
1265 return ERR_PTR(-ENOMEM);
1266 opendata->state = state;
1267 atomic_inc(&state->count);
1268 return opendata;
1269}
1270
dc0b027d 1271static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1272{
2ced46c2 1273 struct nfs4_state *newstate;
864472e9
TM		 1274 int ret;
1275
dc0b027d
TM		 1276 opendata->o_arg.open_flags = 0;
1277 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1278 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1279 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1280 nfs4_init_opendata_res(opendata);
b257957e 1281 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1282 if (ret != 0)
1283 return ret;
2ced46c2 1284 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1285 if (IS_ERR(newstate))
1286 return PTR_ERR(newstate);
643168c2 1287 nfs4_close_state(newstate, fmode);
2ced46c2 1288 *res = newstate;
864472e9
TM		 1289 return 0;
1290}
1291
1292static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1293{
864472e9 1294 struct nfs4_state *newstate;
864472e9
TM		 1295 int ret;
1296
1297 /* memory barrier prior to reading state->n_* */
2ced46c2 1298 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1299 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1300 smp_rmb();
1301 if (state->n_rdwr != 0) {
b0ed9dbc 1302 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1303 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1304 if (ret != 0)
1305 return ret;
2ced46c2
TM		 1306 if (newstate != state)
1307 return -ESTALE;
864472e9
TM		 1308 }
1309 if (state->n_wronly != 0) {
b0ed9dbc 1310 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1311 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1312 if (ret != 0)
1313 return ret;
2ced46c2
TM		 1314 if (newstate != state)
1315 return -ESTALE;
864472e9
TM		 1316 }
1317 if (state->n_rdonly != 0) {
b0ed9dbc 1318 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1319 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1320 if (ret != 0)
1321 return ret;
2ced46c2
TM		 1322 if (newstate != state)
1323 return -ESTALE;
864472e9 1324 }
1ac7e2fd
TM		 1325 /*
1326 * We may have performed cached opens for all three recoveries.
1327 * Check if we need to update the current stateid.
1328 */
1329 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1330 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1331 write_seqlock(&state->seqlock);
1ac7e2fd 1332 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1333 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1334 write_sequnlock(&state->seqlock);
1ac7e2fd 1335 }
864472e9
TM		 1336 return 0;
1337}
1338
1da177e4
LT		 1339/*
1340 * OPEN_RECLAIM:
1341 * reclaim state on the server after a reboot.
1da177e4 1342 */
539cd03a 1343static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1344{
1ac7e2fd 1345 struct nfs_delegation *delegation;
864472e9 1346 struct nfs4_opendata *opendata;
dc0b027d 1347 fmode_t delegation_type = 0;
1da177e4
LT		 1348 int status;
1349
4a1c0893
TM		 1350 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1351 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1352 if (IS_ERR(opendata))
1353 return PTR_ERR(opendata);
1ac7e2fd
TM		 1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1356 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1357 delegation_type = delegation->type;
1ac7e2fd 1358 rcu_read_unlock();
864472e9
TM		 1359 opendata->o_arg.u.delegation_type = delegation_type;
1360 status = nfs4_open_recover(opendata, state);
c6d00e63 1361 nfs4_opendata_put(opendata);
1da177e4
LT		 1362 return status;
1363}
1364
539cd03a 1365static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1366{
1367 struct nfs_server *server = NFS_SERVER(state->inode);
1368 struct nfs4_exception exception = { };
1369 int err;
1370 do {
539cd03a 1371 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1372 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1373 continue;
168667c4 1374 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1375 break;
1376 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1377 } while (exception.retry);
1378 return err;
1379}
1380
864472e9
TM		 1381static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1382{
1383 struct nfs_open_context *ctx;
1384 int ret;
1385
1386 ctx = nfs4_state_find_open_context(state);
1387 if (IS_ERR(ctx))
91876b13 1388 return -EAGAIN;
539cd03a 1389 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1390 put_nfs_open_context(ctx);
1391 return ret;
1392}
1393
db4f2e63 1394static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1395{
be76b5b6
TM		 1396 switch (err) {
1397 default:
1398 printk(KERN_ERR "NFS: %s: unhandled error "
1399 "%d.\n", __func__, err);
1400 case 0:
1401 case -ENOENT:
1402 case -ESTALE:
1403 break;
1404 case -NFS4ERR_BADSESSION:
1405 case -NFS4ERR_BADSLOT:
1406 case -NFS4ERR_BAD_HIGH_SLOT:
1407 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1408 case -NFS4ERR_DEADSESSION:
1409 set_bit(NFS_DELEGATED_STATE, &state->flags);
1410 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1411 return -EAGAIN;
1412 case -NFS4ERR_STALE_CLIENTID:
1413 case -NFS4ERR_STALE_STATEID:
1414 set_bit(NFS_DELEGATED_STATE, &state->flags);
1415 case -NFS4ERR_EXPIRED:
1416 /* Don't recall a delegation if it was lost */
1417 nfs4_schedule_lease_recovery(server->nfs_client);
1418 return -EAGAIN;
1419 case -NFS4ERR_DELEG_REVOKED:
1420 case -NFS4ERR_ADMIN_REVOKED:
1421 case -NFS4ERR_BAD_STATEID:
db4f2e63 1422 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1423 nfs_inode_find_state_and_recover(state->inode,
1424 stateid);
1425 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1426 return 0;
1427 case -NFS4ERR_DELAY:
1428 case -NFS4ERR_GRACE:
1429 set_bit(NFS_DELEGATED_STATE, &state->flags);
1430 ssleep(1);
1431 return -EAGAIN;
db4f2e63
TM		 1432 case -ENOMEM:
1433 case -NFS4ERR_DENIED:
1434 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1435 return 0;
be76b5b6 1436 }
1da177e4
LT		 1437 return err;
1438}
1439
db4f2e63
TM		 1440int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1441{
1442 struct nfs_server *server = NFS_SERVER(state->inode);
1443 struct nfs4_opendata *opendata;
1444 int err;
1445
1446 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1447 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1448 if (IS_ERR(opendata))
1449 return PTR_ERR(opendata);
1450 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1451 err = nfs4_open_recover(opendata, state);
1452 nfs4_opendata_put(opendata);
1453 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1454}
1455
cdd4e68b
TM		 1456static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1457{
1458 struct nfs4_opendata *data = calldata;
1459
1460 data->rpc_status = task->tk_status;
26e976a8 1461 if (data->rpc_status == 0) {
f597c537 1462 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1463 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1464 renew_lease(data->o_res.server, data->timestamp);
3e309914 1465 data->rpc_done = 1;
26e976a8 1466 }
cdd4e68b
TM		 1467}
1468
1469static void nfs4_open_confirm_release(void *calldata)
1470{
1471 struct nfs4_opendata *data = calldata;
1472 struct nfs4_state *state = NULL;
1473
1474 /* If this request hasn't been cancelled, do nothing */
1475 if (data->cancelled == 0)
1476 goto out_free;
1477 /* In case of error, no cleanup! */
3e309914 1478 if (!data->rpc_done)
cdd4e68b 1479 goto out_free;
cdd4e68b 1480 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1481 if (!IS_ERR(state))
643168c2 1482 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1483out_free:
c6d00e63 1484 nfs4_opendata_put(data);
cdd4e68b
TM		 1485}
1486
1487static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1488 .rpc_call_done = nfs4_open_confirm_done,
1489 .rpc_release = nfs4_open_confirm_release,
1490};
1491
1492/*
1493 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1494 */
1495static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1496{
1497 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1498 struct rpc_task *task;
5138fde0
TM		 1499 struct rpc_message msg = {
1500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1501 .rpc_argp = &data->c_arg,
1502 .rpc_resp = &data->c_res,
1503 .rpc_cred = data->owner->so_cred,
1504 };
c970aa85
TM		 1505 struct rpc_task_setup task_setup_data = {
1506 .rpc_client = server->client,
5138fde0 1507 .rpc_message = &msg,
c970aa85
TM		 1508 .callback_ops = &nfs4_open_confirm_ops,
1509 .callback_data = data,
101070ca 1510 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1511 .flags = RPC_TASK_ASYNC,
1512 };
1da177e4
LT		 1513 int status;
1514
c6d00e63 1515 kref_get(&data->kref);
3e309914
TM		 1516 data->rpc_done = 0;
1517 data->rpc_status = 0;
5138fde0 1518 data->timestamp = jiffies;
c970aa85 1519 task = rpc_run_task(&task_setup_data);
7a1218a2 1520 if (IS_ERR(task))
cdd4e68b 1521 return PTR_ERR(task);
cdd4e68b
TM		 1522 status = nfs4_wait_for_completion_rpc_task(task);
1523 if (status != 0) {
1524 data->cancelled = 1;
1525 smp_wmb();
1526 } else
1527 status = data->rpc_status;
e6b3c4db 1528 rpc_put_task(task);
1da177e4
LT		 1529 return status;
1530}
1531
24ac23ab 1532static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1533{
24ac23ab
TM		 1534 struct nfs4_opendata *data = calldata;
1535 struct nfs4_state_owner *sp = data->owner;
549b19cc 1536 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1537
24ac23ab 1538 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1539 goto out_wait;
aac00a8d
TM		 1540 /*
1541 * Check if we still need to send an OPEN call, or if we can use
1542 * a delegation instead.
1543 */
1544 if (data->state != NULL) {
1545 struct nfs_delegation *delegation;
1546
dc0b027d 1547 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1548 goto out_no_action;
aac00a8d
TM		 1549 rcu_read_lock();
1550 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1551 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1552 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1553 can_open_delegated(delegation, data->o_arg.fmode))
1554 goto unlock_no_action;
aac00a8d
TM		 1555 rcu_read_unlock();
1556 }
95b72eb0 1557 /* Update client id. */
549b19cc 1558 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1559 switch (data->o_arg.claim) {
1560 case NFS4_OPEN_CLAIM_PREVIOUS:
1561 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1562 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1563 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1564 case NFS4_OPEN_CLAIM_FH:
1565 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1566 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1567 }
26e976a8 1568 data->timestamp = jiffies;
035168ab 1569 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1570 &data->o_arg.seq_args,
2240a9e2
TM		 1571 &data->o_res.seq_res,
1572 task) != 0)
1573 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1574
1575 /* Set the create mode (note dependency on the session type) */
1576 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1577 if (data->o_arg.open_flags & O_EXCL) {
1578 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1579 if (nfs4_has_persistent_session(clp))
1580 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1581 else if (clp->cl_mvops->minor_version > 0)
1582 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1583 }
6ee41268 1584 return;
652f89f6
TM		 1585unlock_no_action:
1586 rcu_read_unlock();
6ee41268
TM		 1587out_no_action:
1588 task->tk_action = NULL;
c8da19b9 1589out_wait:
b75ad4cd 1590 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1591}
1592
24ac23ab
TM		 1593static void nfs4_open_done(struct rpc_task *task, void *calldata)
1594{
1595 struct nfs4_opendata *data = calldata;
1da177e4 1596
24ac23ab 1597 data->rpc_status = task->tk_status;
d898528c 1598
14516c3a
TM		 1599 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1600 return;
d898528c 1601
24ac23ab 1602 if (task->tk_status == 0) {
807d66d8
TM		 1603 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1604 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1605 case S_IFREG:
1606 break;
1607 case S_IFLNK:
24ac23ab 1608 data->rpc_status = -ELOOP;
6f926b5b
TM		 1609 break;
1610 case S_IFDIR:
24ac23ab 1611 data->rpc_status = -EISDIR;
6f926b5b
TM		 1612 break;
1613 default:
24ac23ab 1614 data->rpc_status = -ENOTDIR;
807d66d8 1615 }
6f926b5b 1616 }
26e976a8 1617 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1618 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1619 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1620 }
3e309914 1621 data->rpc_done = 1;
24ac23ab 1622}
6f926b5b 1623
24ac23ab
TM		 1624static void nfs4_open_release(void *calldata)
1625{
1626 struct nfs4_opendata *data = calldata;
1627 struct nfs4_state *state = NULL;
1628
1629 /* If this request hasn't been cancelled, do nothing */
1630 if (data->cancelled == 0)
1631 goto out_free;
1632 /* In case of error, no cleanup! */
3e309914 1633 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1634 goto out_free;
1635 /* In case we need an open_confirm, no cleanup! */
1636 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1637 goto out_free;
24ac23ab 1638 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1639 if (!IS_ERR(state))
643168c2 1640 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1641out_free:
c6d00e63 1642 nfs4_opendata_put(data);
24ac23ab
TM		 1643}
1644
1645static const struct rpc_call_ops nfs4_open_ops = {
1646 .rpc_call_prepare = nfs4_open_prepare,
1647 .rpc_call_done = nfs4_open_done,
1648 .rpc_release = nfs4_open_release,
1649};
1650
b257957e 1651static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1652{
1653 struct inode *dir = data->dir->d_inode;
1654 struct nfs_server *server = NFS_SERVER(dir);
1655 struct nfs_openargs *o_arg = &data->o_arg;
1656 struct nfs_openres *o_res = &data->o_res;
1657 struct rpc_task *task;
5138fde0
TM		 1658 struct rpc_message msg = {
1659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1660 .rpc_argp = o_arg,
1661 .rpc_resp = o_res,
1662 .rpc_cred = data->owner->so_cred,
1663 };
c970aa85
TM		 1664 struct rpc_task_setup task_setup_data = {
1665 .rpc_client = server->client,
5138fde0 1666 .rpc_message = &msg,
c970aa85
TM		 1667 .callback_ops = &nfs4_open_ops,
1668 .callback_data = data,
101070ca 1669 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1670 .flags = RPC_TASK_ASYNC,
1671 };
24ac23ab
TM		 1672 int status;
1673
9d12b216 1674 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1675 kref_get(&data->kref);
3e309914
TM		 1676 data->rpc_done = 0;
1677 data->rpc_status = 0;
2ced46c2 1678 data->cancelled = 0;
bdeca1b7
TM		 1679 data->is_recover = 0;
1680 if (isrecover) {
8fe72bac 1681 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1682 data->is_recover = 1;
1683 }
c970aa85 1684 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1685 if (IS_ERR(task))
1686 return PTR_ERR(task);
1687 status = nfs4_wait_for_completion_rpc_task(task);
1688 if (status != 0) {
1689 data->cancelled = 1;
1690 smp_wmb();
1691 } else
1692 status = data->rpc_status;
1693 rpc_put_task(task);
1694
1695 return status;
1696}
1697
1698static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1699{
1700 struct inode *dir = data->dir->d_inode;
1701 struct nfs_openres *o_res = &data->o_res;
1702 int status;
1703
1704 status = nfs4_run_open_task(data, 1);
1705 if (status != 0 || !data->rpc_done)
1706 return status;
1707
6926afd1
TM		 1708 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1709
b257957e
AB		 1710 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1711 status = _nfs4_proc_open_confirm(data);
1712 if (status != 0)
1713 return status;
1714 }
1715
1716 return status;
1717}
1718
6168f62c
WAA		 1719static int nfs4_opendata_access(struct rpc_cred *cred,
1720 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1721 struct nfs4_state *state, fmode_t fmode,
1722 int openflags)
6168f62c
WAA		 1723{
1724 struct nfs_access_entry cache;
1725 u32 mask;
1726
1727 /* access call failed or for some reason the server doesn't
1728 * support any access modes -- defer access call until later */
1729 if (opendata->o_res.access_supported == 0)
1730 return 0;
1731
1732 mask = 0;
bbd3a8ee 1733 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1734 * write mode bits, but POSIX allows the creating process to write.
1735 * use openflags to check for exec, because fmode won't
1736 * always have FMODE_EXEC set when file open for exec. */
1737 if (openflags & __FMODE_EXEC) {
1738 /* ONLY check for exec rights */
1739 mask = MAY_EXEC;
1740 } else if (fmode & FMODE_READ)
1741 mask = MAY_READ;
6168f62c
WAA		 1742
1743 cache.cred = cred;
1744 cache.jiffies = jiffies;
1745 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1746 nfs_access_add_cache(state->inode, &cache);
1747
bbd3a8ee 1748 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1749 return 0;
1750
1751 /* even though OPEN succeeded, access is denied. Close the file */
1752 nfs4_close_state(state, fmode);
998f40b5 1753 return -EACCES;
6168f62c
WAA		 1754}
1755
b257957e
AB		 1756/*
1757 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1758 */
1759static int _nfs4_proc_open(struct nfs4_opendata *data)
1760{
1761 struct inode *dir = data->dir->d_inode;
1762 struct nfs_server *server = NFS_SERVER(dir);
1763 struct nfs_openargs *o_arg = &data->o_arg;
1764 struct nfs_openres *o_res = &data->o_res;
1765 int status;
1766
1767 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1768 if (!data->rpc_done)
1769 return status;
1770 if (status != 0) {
1771 if (status == -NFS4ERR_BADNAME &&
1772 !(o_arg->open_flags & O_CREAT))
1773 return -ENOENT;
24ac23ab 1774 return status;
08ef7bd3 1775 }
24ac23ab 1776
6926afd1
TM		 1777 nfs_fattr_map_and_free_names(server, &data->f_attr);
1778
90ff0c54 1779 if (o_arg->open_flags & O_CREAT)
56ae19f3 1780 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1781 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1782 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1783 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1784 status = _nfs4_proc_open_confirm(data);
1da177e4 1785 if (status != 0)
24ac23ab 1786 return status;
1da177e4
LT		 1787 }
1788 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1789 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1790 return 0;
1da177e4
LT		 1791}
1792
d83217c1
AA		 1793static int nfs4_recover_expired_lease(struct nfs_server *server)
1794{
1795 return nfs4_client_recover_expired_lease(server->nfs_client);
1796}
1797
1da177e4
LT		 1798/*
1799 * OPEN_EXPIRED:
1800 * reclaim state on the server after a network partition.
1801 * Assumes caller holds the appropriate lock
1802 */
539cd03a 1803static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1804{
e56e0b78 1805 struct nfs4_opendata *opendata;
864472e9 1806 int ret;
1da177e4 1807
4a1c0893 1808 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1809 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1810 if (IS_ERR(opendata))
1811 return PTR_ERR(opendata);
864472e9 1812 ret = nfs4_open_recover(opendata, state);
35d05778 1813 if (ret == -ESTALE)
3d4ff43d 1814 d_drop(ctx->dentry);
c6d00e63 1815 nfs4_opendata_put(opendata);
864472e9 1816 return ret;
1da177e4
LT		 1817}
1818
a9ed2e25 1819static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1820{
539cd03a 1821 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1822 struct nfs4_exception exception = { };
1823 int err;
1824
1825 do {
539cd03a 1826 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1827 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1828 continue;
a9ed2e25
TM		 1829 switch (err) {
1830 default:
1831 goto out;
1832 case -NFS4ERR_GRACE:
1833 case -NFS4ERR_DELAY:
1834 nfs4_handle_exception(server, err, &exception);
1835 err = 0;
1836 }
202b50dc 1837 } while (exception.retry);
a9ed2e25 1838out:
202b50dc
TM		 1839 return err;
1840}
1841
1da177e4
LT		 1842static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1843{
1da177e4 1844 struct nfs_open_context *ctx;
864472e9 1845 int ret;
1da177e4 1846
864472e9
TM		 1847 ctx = nfs4_state_find_open_context(state);
1848 if (IS_ERR(ctx))
91876b13 1849 return -EAGAIN;
539cd03a 1850 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1851 put_nfs_open_context(ctx);
1852 return ret;
1da177e4
LT		 1853}
1854
f062eb6c 1855#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1856static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1857{
f062eb6c 1858 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1859 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1860 struct nfs_delegation *delegation;
1861 struct rpc_cred *cred = NULL;
1862 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1863
1864 /* If a state reset has been done, test_stateid is unneeded */
1865 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1866 return;
1867
ab7cb0df
TM		 1868 /* Get the delegation credential for use by test/free_stateid */
1869 rcu_read_lock();
1870 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1871 if (delegation != NULL &&
1872 nfs4_stateid_match(&delegation->stateid, stateid)) {
1873 cred = get_rpccred(delegation->cred);
1874 rcu_read_unlock();
1875 status = nfs41_test_stateid(server, stateid, cred);
1876 } else
1877 rcu_read_unlock();
1878
3e60ffdd
CL		 1879 if (status != NFS_OK) {
1880 /* Free the stateid unless the server explicitly
1881 * informs us the stateid is unrecognized. */
1882 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1883 nfs41_free_stateid(server, stateid, cred);
6938867e 1884 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1885
6938867e
BS		 1886 write_seqlock(&state->seqlock);
1887 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1888 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1889 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1890 }
ab7cb0df
TM		 1891
1892 if (cred != NULL)
1893 put_rpccred(cred);
3e60ffdd
CL		 1894}
1895
1896/**
1897 * nfs41_check_open_stateid - possibly free an open stateid
1898 *
1899 * @state: NFSv4 state for an inode
1900 *
1901 * Returns NFS_OK if recovery for this stateid is now finished.
1902 * Otherwise a negative NFS4ERR value is returned.
1903 */
1904static int nfs41_check_open_stateid(struct nfs4_state *state)
1905{
1906 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1907 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1908 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1909 int status;
1910
1911 /* If a state reset has been done, test_stateid is unneeded */
1912 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1913 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1914 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1915 return -NFS4ERR_BAD_STATEID;
1916
ab7cb0df 1917 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1918 if (status != NFS_OK) {
1919 /* Free the stateid unless the server explicitly
1920 * informs us the stateid is unrecognized. */
1921 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1922 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1923
1924 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1925 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1926 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1927 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1928 }
1929 return status;
1930}
1931
1932static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1933{
eb64cf96 1934 int status;
b01dd1d8 1935
3e60ffdd
CL		 1936 nfs41_clear_delegation_stateid(state);
1937 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1938 if (status != NFS_OK)
1939 status = nfs4_open_expired(sp, state);
1940 return status;
f062eb6c
BS		 1941}
1942#endif
1943
aa53ed54
JL		 1944/*
1945 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1946 * fields corresponding to attributes that were used to store the verifier.
1947 * Make sure we clobber those fields in the later setattr call
1948 */
1949static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1950{
1951 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1952 !(sattr->ia_valid & ATTR_ATIME_SET))
1953 sattr->ia_valid |= ATTR_ATIME;
1954
1955 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1956 !(sattr->ia_valid & ATTR_MTIME_SET))
1957 sattr->ia_valid |= ATTR_MTIME;
1958}
1959
c21443c2
TM		 1960static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1961 fmode_t fmode,
1962 int flags,
1963 struct nfs4_state **res)
1964{
1965 struct nfs4_state_owner *sp = opendata->owner;
1966 struct nfs_server *server = sp->so_server;
1967 struct nfs4_state *state;
1968 unsigned int seq;
1969 int ret;
1970
1971 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1972
1973 ret = _nfs4_proc_open(opendata);
1974 if (ret != 0)
1975 goto out;
1976
1977 state = nfs4_opendata_to_nfs4_state(opendata);
1978 ret = PTR_ERR(state);
1979 if (IS_ERR(state))
1980 goto out;
1981 if (server->caps & NFS_CAP_POSIX_LOCK)
1982 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1983
1984 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1985 if (ret != 0)
1986 goto out;
1987
91876b13 1988 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1989 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1990 *res = state;
1991out:
1992 return ret;
1993}
1994
1da177e4 1995/*
24ac23ab 1996 * Returns a referenced nfs4_state
1da177e4 1997 */
82be417a
AA		 1998static int _nfs4_do_open(struct inode *dir,
1999 struct dentry *dentry,
2000 fmode_t fmode,
2001 int flags,
2002 struct iattr *sattr,
2003 struct rpc_cred *cred,
2004 struct nfs4_state **res,
2005 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2006{
2007 struct nfs4_state_owner *sp;
2008 struct nfs4_state *state = NULL;
2009 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2010 struct nfs4_opendata *opendata;
49f9a0fa 2011 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 2012 int status;
1da177e4
LT		 2013
2014 /* Protect against reboot recovery conflicts */
1da177e4 2015 status = -ENOMEM;
d1e284d5
TM		 2016 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2017 if (sp == NULL) {
1da177e4
LT		 2018 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2019 goto out_err;
2020 }
58d9714a
TM		 2021 status = nfs4_recover_expired_lease(server);
2022 if (status != 0)
b4454fe1 2023 goto err_put_state_owner;
82a2c1b7
AV		 2024 if (dentry->d_inode != NULL)
2025 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2026 status = -ENOMEM;
49f9a0fa
TM		 2027 if (dentry->d_inode)
2028 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2029 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2030 claim, GFP_KERNEL);
e56e0b78 2031 if (opendata == NULL)
95d35cb4 2032 goto err_put_state_owner;
1da177e4 2033
82be417a
AA		 2034 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2035 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2036 if (!opendata->f_attr.mdsthreshold)
2037 goto err_opendata_put;
1549210f 2038 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2039 }
82a2c1b7
AV		 2040 if (dentry->d_inode != NULL)
2041 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2042
c21443c2 2043 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2044 if (status != 0)
2045 goto err_opendata_put;
2046
549b19cc
TM		 2047 if ((opendata->o_arg.open_flags & O_EXCL) &&
2048 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2049 nfs4_exclusive_attrset(opendata, sattr);
2050
2051 nfs_fattr_init(opendata->o_res.f_attr);
2052 status = nfs4_do_setattr(state->inode, cred,
2053 opendata->o_res.f_attr, sattr,
2054 state);
2055 if (status == 0)
2056 nfs_setattr_update_inode(state->inode, sattr);
2057 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2058 }
82be417a
AA		 2059
2060 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2061 *ctx_th = opendata->f_attr.mdsthreshold;
2062 else
2063 kfree(opendata->f_attr.mdsthreshold);
2064 opendata->f_attr.mdsthreshold = NULL;
2065
c6d00e63 2066 nfs4_opendata_put(opendata);
1da177e4 2067 nfs4_put_state_owner(sp);
1da177e4
LT		 2068 *res = state;
2069 return 0;
c6d00e63 2070err_opendata_put:
82be417a 2071 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2072 nfs4_opendata_put(opendata);
e56e0b78
TM		 2073err_put_state_owner:
2074 nfs4_put_state_owner(sp);
1da177e4 2075out_err:
1da177e4
LT		 2076 *res = NULL;
2077 return status;
2078}
2079
2080
82be417a
AA		 2081static struct nfs4_state *nfs4_do_open(struct inode *dir,
2082 struct dentry *dentry,
2083 fmode_t fmode,
2084 int flags,
2085 struct iattr *sattr,
2086 struct rpc_cred *cred,
2087 struct nfs4_threshold **ctx_th)
1da177e4 2088{
49f9a0fa 2089 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2090 struct nfs4_exception exception = { };
2091 struct nfs4_state *res;
2092 int status;
2093
6168f62c 2094 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2095 do {
82be417a
AA		 2096 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2097 &res, ctx_th);
1da177e4
LT		 2098 if (status == 0)
2099 break;
2100 /* NOTE: BAD_SEQID means the server and client disagree about the
2101 * book-keeping w.r.t. state-changing operations
2102 * (OPEN/CLOSE/LOCK/LOCKU...)
2103 * It is actually a sign of a bug on the client or on the server.
2104 *
2105 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2106 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2107 * have unhashed the old state_owner for us, and that we can
2108 * therefore safely retry using a new one. We should still warn
2109 * the user though...
2110 */
2111 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2112 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2113 " returned a bad sequence-id error!\n",
2114 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2115 exception.retry = 1;
2116 continue;
2117 }
550f5747
TM		 2118 /*
2119 * BAD_STATEID on OPEN means that the server cancelled our
2120 * state before it received the OPEN_CONFIRM.
2121 * Recover by retrying the request as per the discussion
2122 * on Page 181 of RFC3530.
2123 */
2124 if (status == -NFS4ERR_BAD_STATEID) {
2125 exception.retry = 1;
2126 continue;
2127 }
aac00a8d
TM		 2128 if (status == -EAGAIN) {
2129 /* We must have found a delegation */
2130 exception.retry = 1;
2131 continue;
2132 }
49f9a0fa
TM		 2133 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2134 continue;
2135 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2136 status, &exception));
2137 } while (exception.retry);
2138 return res;
2139}
2140
659bfcd6
TM		 2141static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2142 struct nfs_fattr *fattr, struct iattr *sattr,
2143 struct nfs4_state *state)
1da177e4 2144{
3e4f6290 2145 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2146 struct nfs_setattrargs arg = {
3e4f6290 2147 .fh = NFS_FH(inode),
1da177e4
LT		 2148 .iap = sattr,
2149 .server = server,
2150 .bitmask = server->attr_bitmask,
2151 };
2152 struct nfs_setattrres res = {
2153 .fattr = fattr,
2154 .server = server,
2155 };
2156 struct rpc_message msg = {
659bfcd6
TM		 2157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2158 .rpc_argp = &arg,
2159 .rpc_resp = &res,
2160 .rpc_cred = cred,
1da177e4 2161 };
26e976a8 2162 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2163 fmode_t fmode;
2164 bool truncate;
65e4308d 2165 int status;
1da177e4 2166
0e574af1 2167 nfs_fattr_init(fattr);
1da177e4 2168
ee3ae84e
TM		 2169 /* Servers should only apply open mode checks for file size changes */
2170 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2171 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2172
2173 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2174 /* Use that stateid */
2175 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2176 struct nfs_lockowner lockowner = {
2177 .l_owner = current->files,
2178 .l_pid = current->tgid,
2179 };
4fc8796d 2180 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2181 &lockowner);
08e9eac4 2182 } else
f597c537 2183 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2184
7c513058 2185 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2186 if (status == 0 && state != NULL)
2187 renew_lease(server, timestamp);
65e4308d 2188 return status;
1da177e4
LT		 2189}
2190
659bfcd6
TM		 2191static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2192 struct nfs_fattr *fattr, struct iattr *sattr,
2193 struct nfs4_state *state)
1da177e4 2194{
3e4f6290 2195 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2196 struct nfs4_exception exception = {
2197 .state = state,
3114ea7a 2198 .inode = inode,
a1d0b5ee 2199 };
1da177e4
LT		 2200 int err;
2201 do {
451146be
TM		 2202 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2203 switch (err) {
2204 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2205 if (!(sattr->ia_valid & ATTR_SIZE)) {
2206 pr_warn_once("NFSv4: server %s is incorrectly "
2207 "applying open mode checks to "
2208 "a SETATTR that is not "
2209 "changing file size.\n",
2210 server->nfs_client->cl_hostname);
2211 }
451146be
TM		 2212 if (state && !(state->state & FMODE_WRITE)) {
2213 err = -EBADF;
2214 if (sattr->ia_valid & ATTR_OPEN)
2215 err = -EACCES;
2216 goto out;
2217 }
2218 }
2219 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2220 } while (exception.retry);
451146be 2221out:
1da177e4
LT		 2222 return err;
2223}
2224
2225struct nfs4_closedata {
2226 struct inode *inode;
2227 struct nfs4_state *state;
2228 struct nfs_closeargs arg;
2229 struct nfs_closeres res;
516a6af6 2230 struct nfs_fattr fattr;
26e976a8 2231 unsigned long timestamp;
f7e8917a
FI		 2232 bool roc;
2233 u32 roc_barrier;
1da177e4
LT		 2234};
2235
963d8fe5 2236static void nfs4_free_closedata(void *data)
9512135d 2237{
963d8fe5
TM		 2238 struct nfs4_closedata *calldata = data;
2239 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2240 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2241
f7e8917a
FI		 2242 if (calldata->roc)
2243 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2244 nfs4_put_open_state(calldata->state);
2245 nfs_free_seqid(calldata->arg.seqid);
9512135d 2246 nfs4_put_state_owner(sp);
322b2b90 2247 nfs_sb_deactive(sb);
9512135d
TM		 2248 kfree(calldata);
2249}
2250
88069f77
TM		 2251static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2252 fmode_t fmode)
2253{
2254 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2255 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2256 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2257 case FMODE_WRITE:
88069f77 2258 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2259 break;
2260 case FMODE_READ:
88069f77 2261 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2262 break;
2263 case 0:
2264 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2265 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2266 clear_bit(NFS_OPEN_STATE, &state->flags);
2267 }
88069f77
TM		 2268 spin_unlock(&state->owner->so_lock);
2269}
2270
963d8fe5 2271static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2272{
963d8fe5 2273 struct nfs4_closedata *calldata = data;
1da177e4 2274 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2275 struct nfs_server *server = NFS_SERVER(calldata->inode);
2276
a3ca5651 2277 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2278 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2279 return;
1da177e4
LT		 2280 /* hmm. we are done with the inode, and in the process of freeing
2281 * the state_owner. we keep this around to process errors
2282 */
1da177e4
LT		 2283 switch (task->tk_status) {
2284 case 0:
f7e8917a
FI		 2285 if (calldata->roc)
2286 pnfs_roc_set_barrier(state->inode,
2287 calldata->roc_barrier);
45328c35 2288 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2289 renew_lease(server, calldata->timestamp);
88069f77
TM		 2290 nfs4_close_clear_stateid_flags(state,
2291 calldata->arg.fmode);
1da177e4
LT		 2292 break;
2293 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2294 case -NFS4ERR_OLD_STATEID:
2295 case -NFS4ERR_BAD_STATEID:
1da177e4 2296 case -NFS4ERR_EXPIRED:
dc0b027d 2297 if (calldata->arg.fmode == 0)
9e33bed5 2298 break;
1da177e4 2299 default:
72211dbe
TM		 2300 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2301 rpc_restart_call_prepare(task);
1da177e4 2302 }
72211dbe 2303 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2304 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2305 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2306}
2307
4ce70ada 2308static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2309{
4ce70ada 2310 struct nfs4_closedata *calldata = data;
9512135d 2311 struct nfs4_state *state = calldata->state;
7fdab069 2312 struct inode *inode = calldata->inode;
88069f77 2313 int call_close = 0;
9512135d 2314
a3ca5651 2315 dprintk("%s: begin!\n", __func__);
963d8fe5 2316 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2317 goto out_wait;
003707c7 2318
88069f77
TM		 2319 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2320 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2321 spin_lock(&state->owner->so_lock);
003707c7 2322 /* Calculate the change in open mode */
e7616923 2323 if (state->n_rdwr == 0) {
003707c7 2324 if (state->n_rdonly == 0) {
88069f77
TM		 2325 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2326 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2327 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2328 }
2329 if (state->n_wronly == 0) {
88069f77
TM		 2330 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2331 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2332 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2333 }
e7616923 2334 }
5d422301
TM		 2335 if (!nfs4_valid_open_stateid(state))
2336 call_close = 0;
4cecb76f 2337 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2338
2339 if (!call_close) {
963d8fe5 2340 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2341 goto out_no_action;
9512135d 2342 }
88069f77 2343
f7e8917a 2344 if (calldata->arg.fmode == 0) {
88069f77 2345 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2346 if (calldata->roc &&
b9536ad5
AA		 2347 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2348 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2349 goto out_wait;
b9536ad5 2350 }
f7e8917a 2351 }
88069f77 2352
516a6af6 2353 nfs_fattr_init(calldata->res.fattr);
26e976a8 2354 calldata->timestamp = jiffies;
7fdab069 2355 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2356 &calldata->arg.seq_args,
2357 &calldata->res.seq_res,
2240a9e2
TM		 2358 task) != 0)
2359 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2360 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2361 return;
2362out_no_action:
2363 task->tk_action = NULL;
2364out_wait:
2365 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2366}
2367
963d8fe5 2368static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2369 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2370 .rpc_call_done = nfs4_close_done,
2371 .rpc_release = nfs4_free_closedata,
2372};
2373
1da177e4
LT		 2374/*
2375 * It is possible for data to be read/written from a mem-mapped file
2376 * after the sys_close call (which hits the vfs layer as a flush).
2377 * This means that we can't safely call nfsv4 close on a file until
2378 * the inode is cleared. This in turn means that we are not good
2379 * NFSv4 citizens - we do not indicate to the server to update the file's
2380 * share state even when we are done with one of the three share
2381 * stateid's in the inode.
2382 *
2383 * NOTE: Caller must be holding the sp->so_owner semaphore!
2384 */
1f7977c1 2385int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2386{
4a35bd41 2387 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2388 struct nfs4_closedata *calldata;
b39e625b
TM		 2389 struct nfs4_state_owner *sp = state->owner;
2390 struct rpc_task *task;
5138fde0
TM		 2391 struct rpc_message msg = {
2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2393 .rpc_cred = state->owner->so_cred,
2394 };
c970aa85
TM		 2395 struct rpc_task_setup task_setup_data = {
2396 .rpc_client = server->client,
5138fde0 2397 .rpc_message = &msg,
c970aa85 2398 .callback_ops = &nfs4_close_ops,
101070ca 2399 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2400 .flags = RPC_TASK_ASYNC,
2401 };
9512135d 2402 int status = -ENOMEM;
1da177e4 2403
8535b2be 2404 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2405 if (calldata == NULL)
9512135d 2406 goto out;
9d12b216 2407 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2408 calldata->inode = state->inode;
1da177e4 2409 calldata->state = state;
4a35bd41 2410 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2411 calldata->arg.stateid = &state->open_stateid;
1da177e4 2412 /* Serialization for the sequence id */
8535b2be 2413 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2414 if (calldata->arg.seqid == NULL)
2415 goto out_free_calldata;
dc0b027d 2416 calldata->arg.fmode = 0;
a65318bf 2417 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2418 calldata->res.fattr = &calldata->fattr;
c1d51931 2419 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2420 calldata->res.server = server;
1f7977c1 2421 calldata->roc = pnfs_roc(state->inode);
643168c2 2422 nfs_sb_active(calldata->inode->i_sb);
9512135d 2423
1174dd1f
TM		 2424 msg.rpc_argp = &calldata->arg;
2425 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2426 task_setup_data.callback_data = calldata;
2427 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2428 if (IS_ERR(task))
2429 return PTR_ERR(task);
a49c3c77
TM		 2430 status = 0;
2431 if (wait)
2432 status = rpc_wait_for_completion_task(task);
b39e625b 2433 rpc_put_task(task);
a49c3c77 2434 return status;
9512135d
TM		 2435out_free_calldata:
2436 kfree(calldata);
2437out:
b39e625b
TM		 2438 nfs4_put_open_state(state);
2439 nfs4_put_state_owner(sp);
9512135d 2440 return status;
1da177e4
LT		 2441}
2442
2b484297 2443static struct inode *
cd9a1c0e 2444nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2445{
1da177e4 2446 struct nfs4_state *state;
1da177e4 2447
565277f6 2448 /* Protect against concurrent sillydeletes */
82be417a
AA		 2449 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2450 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2451 if (IS_ERR(state))
2452 return ERR_CAST(state);
cd9a1c0e 2453 ctx->state = state;
f46e0bd3 2454 return igrab(state->inode);
1da177e4
LT		 2455}
2456
1185a552 2457static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2458{
2459 if (ctx->state == NULL)
2460 return;
2461 if (is_sync)
643168c2 2462 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2463 else
643168c2 2464 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2465}
1da177e4
LT		 2466
2467static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2468{
43652ad5
BH		 2469 struct nfs4_server_caps_arg args = {
2470 .fhandle = fhandle,
2471 };
1da177e4
LT		 2472 struct nfs4_server_caps_res res = {};
2473 struct rpc_message msg = {
2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2475 .rpc_argp = &args,
1da177e4
LT		 2476 .rpc_resp = &res,
2477 };
2478 int status;
2479
7c513058 2480 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2481 if (status == 0) {
2482 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2483 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2484 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2485 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2486 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2487 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2488 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2489 server->caps |= NFS_CAP_ACLS;
2490 if (res.has_links != 0)
2491 server->caps |= NFS_CAP_HARDLINKS;
2492 if (res.has_symlinks != 0)
2493 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2494 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2495 server->caps |= NFS_CAP_FILEID;
2496 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2497 server->caps |= NFS_CAP_MODE;
2498 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2499 server->caps |= NFS_CAP_NLINK;
2500 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2501 server->caps |= NFS_CAP_OWNER;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2503 server->caps |= NFS_CAP_OWNER_GROUP;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2505 server->caps |= NFS_CAP_ATIME;
2506 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2507 server->caps |= NFS_CAP_CTIME;
2508 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2509 server->caps |= NFS_CAP_MTIME;
2510
a65318bf
TM		 2511 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2512 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2513 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2514 server->acl_bitmask = res.acl_bitmask;
264e6351 2515 server->fh_expire_type = res.fh_expire_type;
1da177e4 2516 }
cccef3b9 2517
1da177e4
LT		 2518 return status;
2519}
2520
55a97593 2521int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2522{
2523 struct nfs4_exception exception = { };
2524 int err;
2525 do {
2526 err = nfs4_handle_exception(server,
2527 _nfs4_server_capabilities(server, fhandle),
2528 &exception);
2529 } while (exception.retry);
2530 return err;
2531}
2532
2533static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2534 struct nfs_fsinfo *info)
2535{
1da177e4
LT		 2536 struct nfs4_lookup_root_arg args = {
2537 .bitmask = nfs4_fattr_bitmap,
2538 };
2539 struct nfs4_lookup_res res = {
2540 .server = server,
0e574af1 2541 .fattr = info->fattr,
1da177e4
LT		 2542 .fh = fhandle,
2543 };
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2546 .rpc_argp = &args,
2547 .rpc_resp = &res,
2548 };
008f55d0 2549
0e574af1 2550 nfs_fattr_init(info->fattr);
7c513058 2551 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2552}
2553
2554static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2555 struct nfs_fsinfo *info)
2556{
2557 struct nfs4_exception exception = { };
2558 int err;
2559 do {
fb8a5ba8
BS		 2560 err = _nfs4_lookup_root(server, fhandle, info);
2561 switch (err) {
2562 case 0:
2563 case -NFS4ERR_WRONGSEC:
05e9cfb4 2564 goto out;
fb8a5ba8
BS		 2565 default:
2566 err = nfs4_handle_exception(server, err, &exception);
2567 }
1da177e4 2568 } while (exception.retry);
05e9cfb4 2569out:
1da177e4
LT		 2570 return err;
2571}
2572
8f70e95f
BS		 2573static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2574 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2575{
2576 struct rpc_auth *auth;
2577 int ret;
2578
2579 auth = rpcauth_create(flavor, server->client);
e8d920c5 2580 if (IS_ERR(auth)) {
75bc8821 2581 ret = -EACCES;
8f70e95f
BS		 2582 goto out;
2583 }
2584 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2585out:
2586 return ret;
2587}
2588
9a744ba3
CL		 2589/*
2590 * Retry pseudoroot lookup with various security flavors. We do this when:
2591 *
2592 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2593 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2594 *
2595 * Returns zero on success, or a negative NFS4ERR value, or a
2596 * negative errno value.
2597 */
801a16dc 2598static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2599 struct nfs_fsinfo *info)
1da177e4 2600{
9a744ba3
CL		 2601 /* Per 3530bis 15.33.5 */
2602 static const rpc_authflavor_t flav_array[] = {
2603 RPC_AUTH_GSS_KRB5P,
2604 RPC_AUTH_GSS_KRB5I,
2605 RPC_AUTH_GSS_KRB5,
c4eafe11 2606 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2607 RPC_AUTH_NULL,
2608 };
2609 int status = -EPERM;
2610 size_t i;
6a1a1e34 2611
9a744ba3 2612 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2613 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2614 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2615 continue;
2616 break;
8f70e95f 2617 }
9a744ba3 2618
fb8a5ba8
BS		 2619 /*
2620 * -EACCESS could mean that the user doesn't have correct permissions
2621 * to access the mount. It could also mean that we tried to mount
2622 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2623 * existing mount programs don't handle -EACCES very well so it should
2624 * be mapped to -EPERM instead.
2625 */
2626 if (status == -EACCES)
2627 status = -EPERM;
801a16dc
BS		 2628 return status;
2629}
2630
2ed4b95b
CL		 2631static int nfs4_do_find_root_sec(struct nfs_server *server,
2632 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2633{
2634 int mv = server->nfs_client->cl_minorversion;
2635 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2636}
2637
2638/**
2639 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2640 * @server: initialized nfs_server handle
2641 * @fhandle: we fill in the pseudo-fs root file handle
2642 * @info: we fill in an FSINFO struct
2643 *
2644 * Returns zero on success, or a negative errno.
801a16dc 2645 */
3028eb2b
BS		 2646int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2647 struct nfs_fsinfo *info)
801a16dc 2648{
2ed4b95b
CL		 2649 int status;
2650
2651 status = nfs4_lookup_root(server, fhandle, info);
2652 if ((status == -NFS4ERR_WRONGSEC) &&
2653 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2654 status = nfs4_do_find_root_sec(server, fhandle, info);
2655
1da177e4
LT		 2656 if (status == 0)
2657 status = nfs4_server_capabilities(server, fhandle);
2658 if (status == 0)
2659 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2660
c12e87f4 2661 return nfs4_map_errors(status);
1da177e4
LT		 2662}
2663
bae36241
BS		 2664static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2665 struct nfs_fsinfo *info)
2666{
2667 int error;
2668 struct nfs_fattr *fattr = info->fattr;
2669
2670 error = nfs4_server_capabilities(server, mntfh);
2671 if (error < 0) {
2672 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2673 return error;
2674 }
2675
2676 error = nfs4_proc_getattr(server, mntfh, fattr);
2677 if (error < 0) {
2678 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2679 return error;
2680 }
2681
2682 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2683 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2684 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2685
2686 return error;
2687}
2688
6b97fd3d
MN		 2689/*
2690 * Get locations and (maybe) other attributes of a referral.
2691 * Note that we'll actually follow the referral later when
2692 * we detect fsid mismatch in inode revalidation
2693 */
f05d147f
BS		 2694static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2695 const struct qstr *name, struct nfs_fattr *fattr,
2696 struct nfs_fh *fhandle)
6b97fd3d
MN		 2697{
2698 int status = -ENOMEM;
2699 struct page *page = NULL;
2700 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2701
2702 page = alloc_page(GFP_KERNEL);
2703 if (page == NULL)
2704 goto out;
2705 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2706 if (locations == NULL)
2707 goto out;
2708
f05d147f 2709 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2710 if (status != 0)
2711 goto out;
2712 /* Make sure server returned a different fsid for the referral */
2713 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2714 dprintk("%s: server did not return a different fsid for"
2715 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2716 status = -EIO;
2717 goto out;
2718 }
533eb461
AA		 2719 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2720 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2721
533eb461 2722 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2723 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2724 memset(fhandle, 0, sizeof(struct nfs_fh));
2725out:
2726 if (page)
2727 __free_page(page);
5d7ca35a 2728 kfree(locations);
6b97fd3d
MN		 2729 return status;
2730}
2731
1da177e4
LT		 2732static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2733{
2734 struct nfs4_getattr_arg args = {
2735 .fh = fhandle,
2736 .bitmask = server->attr_bitmask,
2737 };
2738 struct nfs4_getattr_res res = {
2739 .fattr = fattr,
2740 .server = server,
2741 };
2742 struct rpc_message msg = {
2743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2744 .rpc_argp = &args,
2745 .rpc_resp = &res,
2746 };
2747
0e574af1 2748 nfs_fattr_init(fattr);
7c513058 2749 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2750}
2751
2752static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2753{
2754 struct nfs4_exception exception = { };
2755 int err;
2756 do {
2757 err = nfs4_handle_exception(server,
2758 _nfs4_proc_getattr(server, fhandle, fattr),
2759 &exception);
2760 } while (exception.retry);
2761 return err;
2762}
2763
2764/*
2765 * The file is not closed if it is opened due to the a request to change
2766 * the size of the file. The open call will not be needed once the
2767 * VFS layer lookup-intents are implemented.
2768 *
2769 * Close is called when the inode is destroyed.
2770 * If we haven't opened the file for O_WRONLY, we
2771 * need to in the size_change case to obtain a stateid.
2772 *
2773 * Got race?
2774 * Because OPEN is always done by name in nfsv4, it is
2775 * possible that we opened a different file by the same
2776 * name. We can recognize this race condition, but we
2777 * can't do anything about it besides returning an error.
2778 *
2779 * This will be fixed with VFS changes (lookup-intent).
2780 */
2781static int
2782nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2783 struct iattr *sattr)
2784{
08e9eac4 2785 struct inode *inode = dentry->d_inode;
659bfcd6 2786 struct rpc_cred *cred = NULL;
d530838b 2787 struct nfs4_state *state = NULL;
1da177e4
LT		 2788 int status;
2789
8a1636c4 2790 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2791 pnfs_commit_and_return_layout(inode);
8a1636c4 2792
0e574af1 2793 nfs_fattr_init(fattr);
1da177e4 2794
2669940d
AA		 2795 /* Deal with open(O_TRUNC) */
2796 if (sattr->ia_valid & ATTR_OPEN)
2797 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2798
2799 /* Optimization: if the end result is no change, don't RPC */
2800 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2801 return 0;
2802
d530838b 2803 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2804 if (sattr->ia_valid & ATTR_FILE) {
2805 struct nfs_open_context *ctx;
2806
2807 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2808 if (ctx) {
2809 cred = ctx->cred;
2810 state = ctx->state;
2811 }
659bfcd6 2812 }
08e9eac4 2813
659bfcd6 2814 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2815 if (status == 0)
2816 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2817 return status;
2818}
2819
0c2e53f1
TM		 2820static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2821 const struct qstr *name, struct nfs_fh *fhandle,
2822 struct nfs_fattr *fattr)
2b3de441 2823{
0c2e53f1 2824 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2825 int status;
2826 struct nfs4_lookup_arg args = {
2827 .bitmask = server->attr_bitmask,
0c2e53f1 2828 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2829 .name = name,
2830 };
2831 struct nfs4_lookup_res res = {
2832 .server = server,
2833 .fattr = fattr,
2834 .fh = fhandle,
2835 };
2836 struct rpc_message msg = {
2837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2838 .rpc_argp = &args,
2839 .rpc_resp = &res,
2840 };
2841
2842 nfs_fattr_init(fattr);
2843
1da177e4 2844 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2845 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2846 dprintk("NFS reply lookup: %d\n", status);
2847 return status;
2848}
2849
72de53ec 2850static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2851{
7ebb9315 2852 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2853 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2854 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2855 fattr->nlink = 2;
2856}
2857
72de53ec
BS		 2858static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2859 struct qstr *name, struct nfs_fh *fhandle,
2860 struct nfs_fattr *fattr)
1da177e4
LT		 2861{
2862 struct nfs4_exception exception = { };
72de53ec 2863 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2864 int err;
2865 do {
72de53ec
BS		 2866 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2867 switch (err) {
08ef7bd3 2868 case -NFS4ERR_BADNAME:
72de53ec
BS		 2869 err = -ENOENT;
2870 goto out;
0c2e53f1 2871 case -NFS4ERR_MOVED:
f05d147f 2872 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2873 goto out;
0c2e53f1 2874 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2875 err = -EPERM;
2876 if (client != *clnt)
2877 goto out;
2878
2879 client = nfs4_create_sec_client(client, dir, name);
2880 if (IS_ERR(client))
2881 return PTR_ERR(client);
2882
2883 exception.retry = 1;
2884 break;
2885 default:
2886 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2887 }
1da177e4 2888 } while (exception.retry);
72de53ec
BS		 2889
2890out:
2891 if (err == 0)
2892 *clnt = client;
2893 else if (client != *clnt)
2894 rpc_shutdown_client(client);
2895
1da177e4
LT		 2896 return err;
2897}
2898
80a16b21 2899static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2900 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2901{
2902 int status;
2903 struct rpc_clnt *client = NFS_CLIENT(dir);
2904
2905 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2906 if (client != NFS_CLIENT(dir)) {
2907 rpc_shutdown_client(client);
2908 nfs_fixup_secinfo_attributes(fattr);
2909 }
2910 return status;
2911}
2912
f05d147f
BS		 2913struct rpc_clnt *
2914nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2915 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2916{
2917 int status;
2918 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2919
2920 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2921 if (status < 0) {
2922 rpc_shutdown_client(client);
2923 return ERR_PTR(status);
2924 }
2925 return client;
2926}
2927
1da177e4
LT		 2928static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2929{
76b32999 2930 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2931 struct nfs4_accessargs args = {
2932 .fh = NFS_FH(inode),
a4980e78 2933 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2934 };
2935 struct nfs4_accessres res = {
2936 .server = server,
1da177e4 2937 };
1da177e4
LT		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2940 .rpc_argp = &args,
2941 .rpc_resp = &res,
2942 .rpc_cred = entry->cred,
2943 };
2944 int mode = entry->mask;
2945 int status;
2946
2947 /*
2948 * Determine which access bits we want to ask for...
2949 */
2950 if (mode & MAY_READ)
2951 args.access |= NFS4_ACCESS_READ;
2952 if (S_ISDIR(inode->i_mode)) {
2953 if (mode & MAY_WRITE)
2954 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2955 if (mode & MAY_EXEC)
2956 args.access |= NFS4_ACCESS_LOOKUP;
2957 } else {
2958 if (mode & MAY_WRITE)
2959 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2960 if (mode & MAY_EXEC)
2961 args.access |= NFS4_ACCESS_EXECUTE;
2962 }
c407d41a
TM		 2963
2964 res.fattr = nfs_alloc_fattr();
2965 if (res.fattr == NULL)
2966 return -ENOMEM;
2967
7c513058 2968 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2969 if (!status) {
6168f62c 2970 nfs_access_set_mask(entry, res.access);
c407d41a 2971 nfs_refresh_inode(inode, res.fattr);
1da177e4 2972 }
c407d41a 2973 nfs_free_fattr(res.fattr);
1da177e4
LT		 2974 return status;
2975}
2976
2977static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2978{
2979 struct nfs4_exception exception = { };
2980 int err;
2981 do {
2982 err = nfs4_handle_exception(NFS_SERVER(inode),
2983 _nfs4_proc_access(inode, entry),
2984 &exception);
2985 } while (exception.retry);
2986 return err;
2987}
2988
2989/*
2990 * TODO: For the time being, we don't try to get any attributes
2991 * along with any of the zero-copy operations READ, READDIR,
2992 * READLINK, WRITE.
2993 *
2994 * In the case of the first three, we want to put the GETATTR
2995 * after the read-type operation -- this is because it is hard
2996 * to predict the length of a GETATTR response in v4, and thus
2997 * align the READ data correctly. This means that the GETATTR
2998 * may end up partially falling into the page cache, and we should
2999 * shift it into the 'tail' of the xdr_buf before processing.
3000 * To do this efficiently, we need to know the total length
3001 * of data received, which doesn't seem to be available outside
3002 * of the RPC layer.
3003 *
3004 * In the case of WRITE, we also want to put the GETATTR after
3005 * the operation -- in this case because we want to make sure
140150db 3006 * we get the post-operation mtime and size.
1da177e4
LT		 3007 *
3008 * Both of these changes to the XDR layer would in fact be quite
3009 * minor, but I decided to leave them for a subsequent patch.
3010 */
3011static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3012 unsigned int pgbase, unsigned int pglen)
3013{
3014 struct nfs4_readlink args = {
3015 .fh = NFS_FH(inode),
3016 .pgbase = pgbase,
3017 .pglen = pglen,
3018 .pages = &page,
3019 };
f50c7000 3020 struct nfs4_readlink_res res;
1da177e4
LT		 3021 struct rpc_message msg = {
3022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3023 .rpc_argp = &args,
f50c7000 3024 .rpc_resp = &res,
1da177e4
LT		 3025 };
3026
7c513058 3027 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3028}
3029
3030static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3031 unsigned int pgbase, unsigned int pglen)
3032{
3033 struct nfs4_exception exception = { };
3034 int err;
3035 do {
3036 err = nfs4_handle_exception(NFS_SERVER(inode),
3037 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3038 &exception);
3039 } while (exception.retry);
3040 return err;
3041}
3042
1da177e4 3043/*
8867fe58 3044 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3045 */
1da177e4
LT		 3046static int
3047nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3048 int flags)
1da177e4 3049{
8867fe58 3050 struct nfs_open_context *ctx;
1da177e4 3051 struct nfs4_state *state;
1da177e4
LT		 3052 int status = 0;
3053
8867fe58
MS		 3054 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3055 if (IS_ERR(ctx))
3056 return PTR_ERR(ctx);
3057
a8a5da99 3058 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3059 state = nfs4_do_open(dir, dentry, ctx->mode,
3060 flags, sattr, ctx->cred,
3061 &ctx->mdsthreshold);
d4d9cdcb 3062 d_drop(dentry);
1da177e4
LT		 3063 if (IS_ERR(state)) {
3064 status = PTR_ERR(state);
c0204fd2 3065 goto out;
1da177e4 3066 }
d4d9cdcb 3067 d_add(dentry, igrab(state->inode));
d75340cc 3068 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3069 ctx->state = state;
1da177e4 3070out:
8867fe58 3071 put_nfs_open_context(ctx);
1da177e4
LT		 3072 return status;
3073}
3074
3075static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3076{
16e42959 3077 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3078 struct nfs_removeargs args = {
1da177e4 3079 .fh = NFS_FH(dir),
26fe5750 3080 .name = *name,
16e42959 3081 };
4fdc17b2 3082 struct nfs_removeres res = {
16e42959 3083 .server = server,
1da177e4 3084 };
1da177e4 3085 struct rpc_message msg = {
4fdc17b2
TM		 3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3087 .rpc_argp = &args,
3088 .rpc_resp = &res,
1da177e4 3089 };
778d2817 3090 int status;
1da177e4 3091
7c513058 3092 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3093 if (status == 0)
16e42959 3094 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3095 return status;
3096}
3097
3098static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3099{
3100 struct nfs4_exception exception = { };
3101 int err;
3102 do {
3103 err = nfs4_handle_exception(NFS_SERVER(dir),
3104 _nfs4_proc_remove(dir, name),
3105 &exception);
3106 } while (exception.retry);
3107 return err;
3108}
3109
e4eff1a6 3110static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3111{
e4eff1a6
TM		 3112 struct nfs_server *server = NFS_SERVER(dir);
3113 struct nfs_removeargs *args = msg->rpc_argp;
3114 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3115
e4eff1a6 3116 res->server = server;
1da177e4 3117 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3118 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3119}
3120
34e137cc
BS		 3121static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3122{
d9afbd1b
TM		 3123 nfs4_setup_sequence(NFS_SERVER(data->dir),
3124 &data->args.seq_args,
3125 &data->res.seq_res,
3126 task);
1da177e4
LT		 3127}
3128
e4eff1a6 3129static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3130{
e4eff1a6
TM		 3131 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3132
14516c3a
TM		 3133 if (!nfs4_sequence_done(task, &res->seq_res))
3134 return 0;
9e33bed5 3135 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3136 return 0;
3137 update_changeattr(dir, &res->cinfo);
e4eff1a6 3138 return 1;
1da177e4
LT		 3139}
3140
d3d4152a
JL		 3141static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3142{
3143 struct nfs_server *server = NFS_SERVER(dir);
3144 struct nfs_renameargs *arg = msg->rpc_argp;
3145 struct nfs_renameres *res = msg->rpc_resp;
3146
3147 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3148 res->server = server;
9d12b216 3149 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3150}
3151
c6bfa1a1
BS		 3152static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3153{
d9afbd1b
TM		 3154 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3155 &data->args.seq_args,
3156 &data->res.seq_res,
3157 task);
d3d4152a
JL		 3158}
3159
3160static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3161 struct inode *new_dir)
3162{
3163 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3164
3165 if (!nfs4_sequence_done(task, &res->seq_res))
3166 return 0;
3167 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3168 return 0;
3169
3170 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3171 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3172 return 1;
3173}
3174
1da177e4
LT		 3175static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3176 struct inode *new_dir, struct qstr *new_name)
3177{
6caf2c82 3178 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3179 struct nfs_renameargs arg = {
1da177e4
LT		 3180 .old_dir = NFS_FH(old_dir),
3181 .new_dir = NFS_FH(new_dir),
3182 .old_name = old_name,
3183 .new_name = new_name,
6caf2c82 3184 };
e8582a8b 3185 struct nfs_renameres res = {
6caf2c82 3186 .server = server,
1da177e4 3187 };
1da177e4
LT		 3188 struct rpc_message msg = {
3189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3190 .rpc_argp = &arg,
3191 .rpc_resp = &res,
3192 };
011fff72 3193 int status = -ENOMEM;
1da177e4 3194
7c513058 3195 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3196 if (!status) {
3197 update_changeattr(old_dir, &res.old_cinfo);
3198 update_changeattr(new_dir, &res.new_cinfo);
3199 }
3200 return status;
3201}
3202
3203static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3204 struct inode *new_dir, struct qstr *new_name)
3205{
3206 struct nfs4_exception exception = { };
3207 int err;
3208 do {
3209 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3210 _nfs4_proc_rename(old_dir, old_name,
3211 new_dir, new_name),
3212 &exception);
3213 } while (exception.retry);
3214 return err;
3215}
3216
3217static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3218{
91ba2eee 3219 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3220 struct nfs4_link_arg arg = {
3221 .fh = NFS_FH(inode),
3222 .dir_fh = NFS_FH(dir),
3223 .name = name,
91ba2eee
TM		 3224 .bitmask = server->attr_bitmask,
3225 };
91ba2eee
TM		 3226 struct nfs4_link_res res = {
3227 .server = server,
1da177e4 3228 };
1da177e4
LT		 3229 struct rpc_message msg = {
3230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3231 .rpc_argp = &arg,
91ba2eee 3232 .rpc_resp = &res,
1da177e4 3233 };
136f2627
TM		 3234 int status = -ENOMEM;
3235
3236 res.fattr = nfs_alloc_fattr();
778d2817 3237 if (res.fattr == NULL)
136f2627 3238 goto out;
1da177e4 3239
7c513058 3240 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3241 if (!status) {
3242 update_changeattr(dir, &res.cinfo);
73a3d07c 3243 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3244 }
136f2627 3245out:
136f2627 3246 nfs_free_fattr(res.fattr);
1da177e4
LT		 3247 return status;
3248}
3249
3250static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3251{
3252 struct nfs4_exception exception = { };
3253 int err;
3254 do {
3255 err = nfs4_handle_exception(NFS_SERVER(inode),
3256 _nfs4_proc_link(inode, dir, name),
3257 &exception);
3258 } while (exception.retry);
3259 return err;
3260}
3261
57dc9a57
TM		 3262struct nfs4_createdata {
3263 struct rpc_message msg;
3264 struct nfs4_create_arg arg;
3265 struct nfs4_create_res res;
3266 struct nfs_fh fh;
3267 struct nfs_fattr fattr;
57dc9a57
TM		 3268};
3269
3270static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3271 struct qstr *name, struct iattr *sattr, u32 ftype)
3272{
3273 struct nfs4_createdata *data;
3274
3275 data = kzalloc(sizeof(*data), GFP_KERNEL);
3276 if (data != NULL) {
3277 struct nfs_server *server = NFS_SERVER(dir);
3278
3279 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3280 data->msg.rpc_argp = &data->arg;
3281 data->msg.rpc_resp = &data->res;
3282 data->arg.dir_fh = NFS_FH(dir);
3283 data->arg.server = server;
3284 data->arg.name = name;
3285 data->arg.attrs = sattr;
3286 data->arg.ftype = ftype;
3287 data->arg.bitmask = server->attr_bitmask;
3288 data->res.server = server;
3289 data->res.fh = &data->fh;
3290 data->res.fattr = &data->fattr;
57dc9a57 3291 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3292 }
3293 return data;
3294}
3295
3296static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3297{
7c513058 3298 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3299 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3300 if (status == 0) {
3301 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3302 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3303 }
3304 return status;
3305}
3306
3307static void nfs4_free_createdata(struct nfs4_createdata *data)
3308{
3309 kfree(data);
3310}
3311
4f390c15 3312static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3313 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3314{
57dc9a57
TM		 3315 struct nfs4_createdata *data;
3316 int status = -ENAMETOOLONG;
1da177e4 3317
94a6d753 3318 if (len > NFS4_MAXPATHLEN)
57dc9a57 3319 goto out;
4f390c15 3320
57dc9a57
TM		 3321 status = -ENOMEM;
3322 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3323 if (data == NULL)
3324 goto out;
3325
3326 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3327 data->arg.u.symlink.pages = &page;
3328 data->arg.u.symlink.len = len;
1da177e4 3329
57dc9a57
TM		 3330 status = nfs4_do_create(dir, dentry, data);
3331
3332 nfs4_free_createdata(data);
3333out:
1da177e4
LT		 3334 return status;
3335}
3336
4f390c15 3337static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3338 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3339{
3340 struct nfs4_exception exception = { };
3341 int err;
3342 do {
3343 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3344 _nfs4_proc_symlink(dir, dentry, page,
3345 len, sattr),
1da177e4
LT		 3346 &exception);
3347 } while (exception.retry);
3348 return err;
3349}
3350
3351static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3352 struct iattr *sattr)
3353{
57dc9a57
TM		 3354 struct nfs4_createdata *data;
3355 int status = -ENOMEM;
1da177e4 3356
57dc9a57
TM		 3357 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3358 if (data == NULL)
3359 goto out;
3360
3361 status = nfs4_do_create(dir, dentry, data);
3362
3363 nfs4_free_createdata(data);
3364out:
1da177e4
LT		 3365 return status;
3366}
3367
3368static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3369 struct iattr *sattr)
3370{
3371 struct nfs4_exception exception = { };
3372 int err;
a8a5da99
AK		 3373
3374 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3375 do {
3376 err = nfs4_handle_exception(NFS_SERVER(dir),
3377 _nfs4_proc_mkdir(dir, dentry, sattr),
3378 &exception);
3379 } while (exception.retry);
3380 return err;
3381}
3382
3383static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3384 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3385{
3386 struct inode *dir = dentry->d_inode;
3387 struct nfs4_readdir_arg args = {
3388 .fh = NFS_FH(dir),
56e4ebf8 3389 .pages = pages,
1da177e4
LT		 3390 .pgbase = 0,
3391 .count = count,
96d25e53 3392 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3393 .plus = plus,
1da177e4
LT		 3394 };
3395 struct nfs4_readdir_res res;
3396 struct rpc_message msg = {
3397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3398 .rpc_argp = &args,
3399 .rpc_resp = &res,
3400 .rpc_cred = cred,
3401 };
3402 int status;
3403
3110ff80 3404 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3405 dentry->d_parent->d_name.name,
3406 dentry->d_name.name,
3407 (unsigned long long)cookie);
c3f52af3 3408 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3409 res.pgbase = args.pgbase;
7c513058 3410 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3411 if (status >= 0) {
c3f52af3 3412 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3413 status += args.pgbase;
3414 }
c4812998
TM		 3415
3416 nfs_invalidate_atime(dir);
3417
3110ff80 3418 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3419 return status;
3420}
3421
3422static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3423 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3424{
3425 struct nfs4_exception exception = { };
3426 int err;
3427 do {
3428 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3429 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3430 pages, count, plus),
1da177e4
LT		 3431 &exception);
3432 } while (exception.retry);
3433 return err;
3434}
3435
3436static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3437 struct iattr *sattr, dev_t rdev)
3438{
57dc9a57
TM		 3439 struct nfs4_createdata *data;
3440 int mode = sattr->ia_mode;
3441 int status = -ENOMEM;
1da177e4 3442
57dc9a57
TM		 3443 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3444 if (data == NULL)
3445 goto out;
3446
1da177e4 3447 if (S_ISFIFO(mode))
57dc9a57 3448 data->arg.ftype = NF4FIFO;
1da177e4 3449 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3450 data->arg.ftype = NF4BLK;
3451 data->arg.u.device.specdata1 = MAJOR(rdev);
3452 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3453 }
3454 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3455 data->arg.ftype = NF4CHR;
3456 data->arg.u.device.specdata1 = MAJOR(rdev);
3457 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3458 } else if (!S_ISSOCK(mode)) {
3459 status = -EINVAL;
3460 goto out_free;
1da177e4 3461 }
1da177e4 3462
57dc9a57 3463 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3464out_free:
57dc9a57
TM		 3465 nfs4_free_createdata(data);
3466out:
1da177e4
LT		 3467 return status;
3468}
3469
3470static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3471 struct iattr *sattr, dev_t rdev)
3472{
3473 struct nfs4_exception exception = { };
3474 int err;
a8a5da99
AK		 3475
3476 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3477 do {
3478 err = nfs4_handle_exception(NFS_SERVER(dir),
3479 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3480 &exception);
3481 } while (exception.retry);
3482 return err;
3483}
3484
3485static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3486 struct nfs_fsstat *fsstat)
3487{
3488 struct nfs4_statfs_arg args = {
3489 .fh = fhandle,
3490 .bitmask = server->attr_bitmask,
3491 };
24ad148a
BH		 3492 struct nfs4_statfs_res res = {
3493 .fsstat = fsstat,
3494 };
1da177e4
LT		 3495 struct rpc_message msg = {
3496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3497 .rpc_argp = &args,
24ad148a 3498 .rpc_resp = &res,
1da177e4
LT		 3499 };
3500
0e574af1 3501 nfs_fattr_init(fsstat->fattr);
7c513058 3502 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3503}
3504
3505static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3506{
3507 struct nfs4_exception exception = { };
3508 int err;
3509 do {
3510 err = nfs4_handle_exception(server,
3511 _nfs4_proc_statfs(server, fhandle, fsstat),
3512 &exception);
3513 } while (exception.retry);
3514 return err;
3515}
3516
3517static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3518 struct nfs_fsinfo *fsinfo)
3519{
3520 struct nfs4_fsinfo_arg args = {
3521 .fh = fhandle,
3522 .bitmask = server->attr_bitmask,
3523 };
3dda5e43
BH		 3524 struct nfs4_fsinfo_res res = {
3525 .fsinfo = fsinfo,
3526 };
1da177e4
LT		 3527 struct rpc_message msg = {
3528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3529 .rpc_argp = &args,
3dda5e43 3530 .rpc_resp = &res,
1da177e4
LT		 3531 };
3532
7c513058 3533 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3534}
3535
3536static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3537{
3538 struct nfs4_exception exception = { };
83ca7f5a 3539 unsigned long now = jiffies;
1da177e4
LT		 3540 int err;
3541
3542 do {
83ca7f5a
CL		 3543 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3544 if (err == 0) {
3545 struct nfs_client *clp = server->nfs_client;
3546
3547 spin_lock(&clp->cl_lock);
3548 clp->cl_lease_time = fsinfo->lease_time * HZ;
3549 clp->cl_last_renewal = now;
3550 spin_unlock(&clp->cl_lock);
3551 break;
3552 }
3553 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3554 } while (exception.retry);
3555 return err;
3556}
3557
3558static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3559{
e38eb650
BS		 3560 int error;
3561
0e574af1 3562 nfs_fattr_init(fsinfo->fattr);
e38eb650 3563 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3564 if (error == 0) {
3565 /* block layout checks this! */
3566 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3567 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3568 }
e38eb650
BS		 3569
3570 return error;
1da177e4
LT		 3571}
3572
3573static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3574 struct nfs_pathconf *pathconf)
3575{
3576 struct nfs4_pathconf_arg args = {
3577 .fh = fhandle,
3578 .bitmask = server->attr_bitmask,
3579 };
d45b2989
BH		 3580 struct nfs4_pathconf_res res = {
3581 .pathconf = pathconf,
3582 };
1da177e4
LT		 3583 struct rpc_message msg = {
3584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3585 .rpc_argp = &args,
d45b2989 3586 .rpc_resp = &res,
1da177e4
LT		 3587 };
3588
3589 /* None of the pathconf attributes are mandatory to implement */
3590 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3591 memset(pathconf, 0, sizeof(*pathconf));
3592 return 0;
3593 }
3594
0e574af1 3595 nfs_fattr_init(pathconf->fattr);
7c513058 3596 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3597}
3598
3599static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3600 struct nfs_pathconf *pathconf)
3601{
3602 struct nfs4_exception exception = { };
3603 int err;
3604
3605 do {
3606 err = nfs4_handle_exception(server,
3607 _nfs4_proc_pathconf(server, fhandle, pathconf),
3608 &exception);
3609 } while (exception.retry);
3610 return err;
3611}
3612
5521abfd 3613int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3614 const struct nfs_open_context *ctx,
3615 const struct nfs_lock_context *l_ctx,
3616 fmode_t fmode)
3617{
3618 const struct nfs_lockowner *lockowner = NULL;
3619
3620 if (l_ctx != NULL)
3621 lockowner = &l_ctx->lockowner;
5521abfd 3622 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3623}
3624EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3625
5521abfd
TM		 3626static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3627 const struct nfs_open_context *ctx,
3628 const struct nfs_lock_context *l_ctx,
3629 fmode_t fmode)
3630{
3631 nfs4_stateid current_stateid;
3632
3633 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3634 return false;
3635 return nfs4_stateid_match(stateid, &current_stateid);
3636}
3637
3638static bool nfs4_error_stateid_expired(int err)
3639{
3640 switch (err) {
3641 case -NFS4ERR_DELEG_REVOKED:
3642 case -NFS4ERR_ADMIN_REVOKED:
3643 case -NFS4ERR_BAD_STATEID:
3644 case -NFS4ERR_STALE_STATEID:
3645 case -NFS4ERR_OLD_STATEID:
3646 case -NFS4ERR_OPENMODE:
3647 case -NFS4ERR_EXPIRED:
3648 return true;
3649 }
3650 return false;
3651}
3652
d20581aa
BH		 3653void __nfs4_read_done_cb(struct nfs_read_data *data)
3654{
cd841605 3655 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3656}
3657
cbdabc7f 3658static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3659{
cd841605 3660 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3661
9e33bed5 3662 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3663 rpc_restart_call_prepare(task);
ec06c096 3664 return -EAGAIN;
1da177e4 3665 }
8850df99 3666
d20581aa 3667 __nfs4_read_done_cb(data);
1da177e4 3668 if (task->tk_status > 0)
ec06c096
TM		 3669 renew_lease(server, data->timestamp);
3670 return 0;
1da177e4
LT		 3671}
3672
5521abfd
TM		 3673static bool nfs4_read_stateid_changed(struct rpc_task *task,
3674 struct nfs_readargs *args)
3675{
3676
3677 if (!nfs4_error_stateid_expired(task->tk_status) ||
3678 nfs4_stateid_is_current(&args->stateid,
3679 args->context,
3680 args->lock_context,
3681 FMODE_READ))
3682 return false;
3683 rpc_restart_call_prepare(task);
3684 return true;
3685}
3686
cbdabc7f
AA		 3687static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3688{
3689
3690 dprintk("--> %s\n", __func__);
3691
3692 if (!nfs4_sequence_done(task, &data->res.seq_res))
3693 return -EAGAIN;
5521abfd
TM		 3694 if (nfs4_read_stateid_changed(task, &data->args))
3695 return -EAGAIN;
d20581aa
BH		 3696 return data->read_done_cb ? data->read_done_cb(task, data) :
3697 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3698}
3699
bdc7f021 3700static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3701{
1da177e4 3702 data->timestamp = jiffies;
cbdabc7f 3703 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3704 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3705 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3706}
3707
ea7c3303
BS		 3708static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3709{
9b206149 3710 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3711 &data->args.seq_args,
3712 &data->res.seq_res,
9b206149
TM		 3713 task))
3714 return;
3715 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3716 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3717}
3718
b029bc9b 3719static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3720{
cd841605 3721 struct inode *inode = data->header->inode;
1da177e4 3722
9e33bed5 3723 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3724 rpc_restart_call_prepare(task);
788e7a89 3725 return -EAGAIN;
1da177e4 3726 }
4f9838c7 3727 if (task->tk_status >= 0) {
1da177e4 3728 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3729 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3730 }
788e7a89 3731 return 0;
1da177e4
LT		 3732}
3733
5521abfd
TM		 3734static bool nfs4_write_stateid_changed(struct rpc_task *task,
3735 struct nfs_writeargs *args)
3736{
3737
3738 if (!nfs4_error_stateid_expired(task->tk_status) ||
3739 nfs4_stateid_is_current(&args->stateid,
3740 args->context,
3741 args->lock_context,
3742 FMODE_WRITE))
3743 return false;
3744 rpc_restart_call_prepare(task);
3745 return true;
3746}
3747
b029bc9b
FI		 3748static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3749{
3750 if (!nfs4_sequence_done(task, &data->res.seq_res))
3751 return -EAGAIN;
5521abfd
TM		 3752 if (nfs4_write_stateid_changed(task, &data->args))
3753 return -EAGAIN;
d20581aa
BH		 3754 return data->write_done_cb ? data->write_done_cb(task, data) :
3755 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3756}
3757
5a37f851
TM		 3758static
3759bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3760{
5a37f851
TM		 3761 const struct nfs_pgio_header *hdr = data->header;
3762
3763 /* Don't request attributes for pNFS or O_DIRECT writes */
3764 if (data->ds_clp != NULL || hdr->dreq != NULL)
3765 return false;
3766 /* Otherwise, request attributes if and only if we don't hold
3767 * a delegation
3768 */
011e2a7f 3769 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3770}
a69aef14 3771
bdc7f021 3772static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3773{
cd841605 3774 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3775
5a37f851 3776 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3777 data->args.bitmask = NULL;
3778 data->res.fattr = NULL;
3779 } else
3780 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3781
b029bc9b
FI		 3782 if (!data->write_done_cb)
3783 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3784 data->res.server = server;
1da177e4
LT		 3785 data->timestamp = jiffies;
3786
bdc7f021 3787 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3788 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3789}
3790
c6cb80d0
BS		 3791static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3792{
9b206149 3793 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3794 &data->args.seq_args,
3795 &data->res.seq_res,
9b206149
TM		 3796 task))
3797 return;
3798 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3799 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3800}
3801
0b7c0153 3802static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3803{
d9afbd1b
TM		 3804 nfs4_setup_sequence(NFS_SERVER(data->inode),
3805 &data->args.seq_args,
3806 &data->res.seq_res,
3807 task);
1da177e4
LT		 3808}
3809
0b7c0153 3810static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3811{
1da177e4 3812 struct inode *inode = data->inode;
14516c3a 3813
9e33bed5 3814 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3815 rpc_restart_call_prepare(task);
788e7a89 3816 return -EAGAIN;
1da177e4 3817 }
788e7a89 3818 return 0;
1da177e4
LT		 3819}
3820
0b7c0153 3821static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3822{
3823 if (!nfs4_sequence_done(task, &data->res.seq_res))
3824 return -EAGAIN;
0b7c0153 3825 return data->commit_done_cb(task, data);
5f452431
FI		 3826}
3827
0b7c0153 3828static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3829{
788e7a89 3830 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3831
0b7c0153
FI		 3832 if (data->commit_done_cb == NULL)
3833 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3834 data->res.server = server;
bdc7f021 3835 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3836 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3837}
3838
9bc4e3ca
CL		 3839struct nfs4_renewdata {
3840 struct nfs_client *client;
3841 unsigned long timestamp;
3842};
3843
1da177e4
LT		 3844/*
3845 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3846 * standalone procedure for queueing an asynchronous RENEW.
3847 */
9bc4e3ca 3848static void nfs4_renew_release(void *calldata)
dc96aef9 3849{
9bc4e3ca
CL		 3850 struct nfs4_renewdata *data = calldata;
3851 struct nfs_client *clp = data->client;
dc96aef9 3852
0851de06
AB		 3853 if (atomic_read(&clp->cl_count) > 1)
3854 nfs4_schedule_state_renewal(clp);
3855 nfs_put_client(clp);
9bc4e3ca 3856 kfree(data);
dc96aef9
AB		 3857}
3858
9bc4e3ca 3859static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3860{
9bc4e3ca
CL		 3861 struct nfs4_renewdata *data = calldata;
3862 struct nfs_client *clp = data->client;
3863 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3864
3865 if (task->tk_status < 0) {
95baa25c 3866 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3867 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3868 return;
3869 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3870 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3871 return;
3872 }
3873 nfs4_schedule_path_down_recovery(clp);
1da177e4 3874 }
452e9352 3875 do_renew_lease(clp, timestamp);
1da177e4
LT		 3876}
3877
963d8fe5
TM		 3878static const struct rpc_call_ops nfs4_renew_ops = {
3879 .rpc_call_done = nfs4_renew_done,
dc96aef9 3880 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3881};
3882
2f60ea6b 3883static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3884{
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3887 .rpc_argp = clp,
b4454fe1 3888 .rpc_cred = cred,
1da177e4 3889 };
9bc4e3ca 3890 struct nfs4_renewdata *data;
1da177e4 3891
2f60ea6b
TM		 3892 if (renew_flags == 0)
3893 return 0;
0851de06
AB		 3894 if (!atomic_inc_not_zero(&clp->cl_count))
3895 return -EIO;
b569ad34 3896 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3897 if (data == NULL)
3898 return -ENOMEM;
3899 data->client = clp;
3900 data->timestamp = jiffies;
bc7a05ca 3901 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3902 &nfs4_renew_ops, data);
1da177e4
LT		 3903}
3904
8534d4ec 3905static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3906{
3907 struct rpc_message msg = {
3908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3909 .rpc_argp = clp,
b4454fe1 3910 .rpc_cred = cred,
1da177e4
LT		 3911 };
3912 unsigned long now = jiffies;
3913 int status;
3914
bc7a05ca 3915 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3916 if (status < 0)
3917 return status;
452e9352 3918 do_renew_lease(clp, now);
1da177e4
LT		 3919 return 0;
3920}
3921
aa1870af
BF		 3922static inline int nfs4_server_supports_acls(struct nfs_server *server)
3923{
3924 return (server->caps & NFS_CAP_ACLS)
3925 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3926 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3927}
3928
21f498c2
TM		 3929/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3930 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3931 * the stack.
3932 */
21f498c2 3933#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3934
e9e3d724
NH		 3935static int buf_to_pages_noslab(const void *buf, size_t buflen,
3936 struct page **pages, unsigned int *pgbase)
3937{
3938 struct page *newpage, **spages;
3939 int rc = 0;
3940 size_t len;
3941 spages = pages;
3942
3943 do {
21f498c2 3944 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3945 newpage = alloc_page(GFP_KERNEL);
3946
3947 if (newpage == NULL)
3948 goto unwind;
3949 memcpy(page_address(newpage), buf, len);
3950 buf += len;
3951 buflen -= len;
3952 *pages++ = newpage;
3953 rc++;
3954 } while (buflen != 0);
3955
3956 return rc;
3957
3958unwind:
3959 for(; rc > 0; rc--)
3960 __free_page(spages[rc-1]);
3961 return -ENOMEM;
3962}
3963
e50a1c2e
BF		 3964struct nfs4_cached_acl {
3965 int cached;
3966 size_t len;
3e9d4154 3967 char data[0];
e50a1c2e
BF		 3968};
3969
3970static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3971{
3972 struct nfs_inode *nfsi = NFS_I(inode);
3973
3974 spin_lock(&inode->i_lock);
3975 kfree(nfsi->nfs4_acl);
3976 nfsi->nfs4_acl = acl;
3977 spin_unlock(&inode->i_lock);
3978}
3979
3980static void nfs4_zap_acl_attr(struct inode *inode)
3981{
3982 nfs4_set_cached_acl(inode, NULL);
3983}
3984
3985static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3986{
3987 struct nfs_inode *nfsi = NFS_I(inode);
3988 struct nfs4_cached_acl *acl;
3989 int ret = -ENOENT;
3990
3991 spin_lock(&inode->i_lock);
3992 acl = nfsi->nfs4_acl;
3993 if (acl == NULL)
3994 goto out;
3995 if (buf == NULL) /* user is just asking for length */
3996 goto out_len;
3997 if (acl->cached == 0)
3998 goto out;
3999 ret = -ERANGE; /* see getxattr(2) man page */
4000 if (acl->len > buflen)
4001 goto out;
4002 memcpy(buf, acl->data, acl->len);
4003out_len:
4004 ret = acl->len;
4005out:
4006 spin_unlock(&inode->i_lock);
4007 return ret;
4008}
4009
5794d21e 4010static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4011{
4012 struct nfs4_cached_acl *acl;
b291f1b1 4013 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4014
1f1ea6c2 4015 if (buflen <= PAGE_SIZE) {
b291f1b1 4016 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4017 if (acl == NULL)
4018 goto out;
4019 acl->cached = 1;
5794d21e 4020 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4021 } else {
4022 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4023 if (acl == NULL)
4024 goto out;
4025 acl->cached = 0;
4026 }
4027 acl->len = acl_len;
4028out:
4029 nfs4_set_cached_acl(inode, acl);
4030}
4031
bf118a34
AA		 4032/*
4033 * The getxattr API returns the required buffer length when called with a
4034 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4035 * the required buf. On a NULL buf, we send a page of data to the server
4036 * guessing that the ACL request can be serviced by a page. If so, we cache
4037 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4038 * the cache. If not so, we throw away the page, and cache the required
4039 * length. The next getxattr call will then produce another round trip to
4040 * the server, this time with the input buf of the required size.
4041 */
16b4289c 4042static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4043{
bf118a34 4044 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4045 struct nfs_getaclargs args = {
4046 .fh = NFS_FH(inode),
4047 .acl_pages = pages,
4048 .acl_len = buflen,
4049 };
663c79b3
BH		 4050 struct nfs_getaclres res = {
4051 .acl_len = buflen,
4052 };
aa1870af
BF		 4053 struct rpc_message msg = {
4054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4055 .rpc_argp = &args,
663c79b3 4056 .rpc_resp = &res,
aa1870af 4057 };
21f498c2
TM		 4058 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4059 int ret = -ENOMEM, i;
aa1870af 4060
bf118a34
AA		 4061 /* As long as we're doing a round trip to the server anyway,
4062 * let's be prepared for a page of acl data. */
4063 if (npages == 0)
4064 npages = 1;
21f498c2
TM		 4065 if (npages > ARRAY_SIZE(pages))
4066 return -ERANGE;
5a006899 4067
bf118a34
AA		 4068 for (i = 0; i < npages; i++) {
4069 pages[i] = alloc_page(GFP_KERNEL);
4070 if (!pages[i])
4071 goto out_free;
e50a1c2e 4072 }
5a006899
SP		 4073
4074 /* for decoding across pages */
4075 res.acl_scratch = alloc_page(GFP_KERNEL);
4076 if (!res.acl_scratch)
4077 goto out_free;
4078
bf118a34
AA		 4079 args.acl_len = npages * PAGE_SIZE;
4080 args.acl_pgbase = 0;
5a006899 4081
de040bec 4082 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4083 __func__, buf, buflen, npages, args.acl_len);
4084 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4085 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4086 if (ret)
4087 goto out_free;
bf118a34 4088
1f1ea6c2
TM		 4089 /* Handle the case where the passed-in buffer is too short */
4090 if (res.acl_flags & NFS4_ACL_TRUNC) {
4091 /* Did the user only issue a request for the acl length? */
4092 if (buf == NULL)
4093 goto out_ok;
e50a1c2e 4094 ret = -ERANGE;
1f1ea6c2 4095 goto out_free;
e50a1c2e 4096 }
1f1ea6c2 4097 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4098 if (buf) {
4099 if (res.acl_len > buflen) {
4100 ret = -ERANGE;
4101 goto out_free;
4102 }
1f1ea6c2 4103 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4104 }
1f1ea6c2
TM		 4105out_ok:
4106 ret = res.acl_len;
e50a1c2e 4107out_free:
bf118a34
AA		 4108 for (i = 0; i < npages; i++)
4109 if (pages[i])
4110 __free_page(pages[i]);
331818f1
TM		 4111 if (res.acl_scratch)
4112 __free_page(res.acl_scratch);
aa1870af
BF		 4113 return ret;
4114}
4115
16b4289c
TM		 4116static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4117{
4118 struct nfs4_exception exception = { };
4119 ssize_t ret;
4120 do {
4121 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4122 if (ret >= 0)
4123 break;
4124 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4125 } while (exception.retry);
4126 return ret;
4127}
4128
e50a1c2e
BF		 4129static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4130{
4131 struct nfs_server *server = NFS_SERVER(inode);
4132 int ret;
4133
4134 if (!nfs4_server_supports_acls(server))
4135 return -EOPNOTSUPP;
4136 ret = nfs_revalidate_inode(server, inode);
4137 if (ret < 0)
4138 return ret;
08a22b39
AK		 4139 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4140 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4141 ret = nfs4_read_cached_acl(inode, buf, buflen);
4142 if (ret != -ENOENT)
bf118a34
AA		 4143 /* -ENOENT is returned if there is no ACL or if there is an ACL
4144 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4145 return ret;
4146 return nfs4_get_acl_uncached(inode, buf, buflen);
4147}
4148
16b4289c 4149static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4150{
4151 struct nfs_server *server = NFS_SERVER(inode);
4152 struct page *pages[NFS4ACL_MAXPAGES];
4153 struct nfs_setaclargs arg = {
4154 .fh = NFS_FH(inode),
4155 .acl_pages = pages,
4156 .acl_len = buflen,
4157 };
73c403a9 4158 struct nfs_setaclres res;
4b580ee3
BF		 4159 struct rpc_message msg = {
4160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4161 .rpc_argp = &arg,
73c403a9 4162 .rpc_resp = &res,
4b580ee3 4163 };
21f498c2 4164 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4165 int ret, i;
4b580ee3
BF		 4166
4167 if (!nfs4_server_supports_acls(server))
4168 return -EOPNOTSUPP;
21f498c2
TM		 4169 if (npages > ARRAY_SIZE(pages))
4170 return -ERANGE;
e9e3d724
NH		 4171 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4172 if (i < 0)
4173 return i;
57ec14c5 4174 nfs4_inode_return_delegation(inode);
7c513058 4175 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4176
4177 /*
4178 * Free each page after tx, so the only ref left is
4179 * held by the network stack
4180 */
4181 for (; i > 0; i--)
4182 put_page(pages[i-1]);
4183
08a22b39
AK		 4184 /*
4185 * Acl update can result in inode attribute update.
4186 * so mark the attribute cache invalid.
4187 */
4188 spin_lock(&inode->i_lock);
4189 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4190 spin_unlock(&inode->i_lock);
f41f7418
TM		 4191 nfs_access_zap_cache(inode);
4192 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4193 return ret;
4194}
4195
16b4289c
TM		 4196static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4197{
4198 struct nfs4_exception exception = { };
4199 int err;
4200 do {
4201 err = nfs4_handle_exception(NFS_SERVER(inode),
4202 __nfs4_proc_set_acl(inode, buf, buflen),
4203 &exception);
4204 } while (exception.retry);
4205 return err;
4206}
4207
1da177e4 4208static int
aa5190d0 4209nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4210{
aa5190d0
TM		 4211 struct nfs_client *clp = server->nfs_client;
4212
4213 if (task->tk_status >= 0)
1da177e4
LT		 4214 return 0;
4215 switch(task->tk_status) {
a1d0b5ee 4216 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4217 case -NFS4ERR_ADMIN_REVOKED:
4218 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4219 if (state == NULL)
4220 break;
4221 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4222 case -NFS4ERR_OPENMODE:
4223 if (state == NULL)
4224 break;
5d422301
TM		 4225 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4226 goto stateid_invalid;
0400a6b0 4227 goto wait_on_recovery;
0ced63d1 4228 case -NFS4ERR_EXPIRED:
5d422301
TM		 4229 if (state != NULL) {
4230 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4231 goto stateid_invalid;
4232 }
1da177e4 4233 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4234 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4235 nfs4_schedule_lease_recovery(clp);
4236 goto wait_on_recovery;
4745e315
AA		 4237#if defined(CONFIG_NFS_V4_1)
4238 case -NFS4ERR_BADSESSION:
4239 case -NFS4ERR_BADSLOT:
4240 case -NFS4ERR_BAD_HIGH_SLOT:
4241 case -NFS4ERR_DEADSESSION:
4242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4243 case -NFS4ERR_SEQ_FALSE_RETRY:
4244 case -NFS4ERR_SEQ_MISORDERED:
4245 dprintk("%s ERROR %d, Reset session\n", __func__,
4246 task->tk_status);
9f594791 4247 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4248 task->tk_status = 0;
4249 return -EAGAIN;
4250#endif /* CONFIG_NFS_V4_1 */
1da177e4 4251 case -NFS4ERR_DELAY:
aa5190d0 4252 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4253 case -NFS4ERR_GRACE:
1da177e4
LT		 4254 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4255 task->tk_status = 0;
4256 return -EAGAIN;
a8a4ae3a 4257 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4258 case -NFS4ERR_OLD_STATEID:
4259 task->tk_status = 0;
4260 return -EAGAIN;
4261 }
4262 task->tk_status = nfs4_map_errors(task->tk_status);
4263 return 0;
5d422301
TM		 4264stateid_invalid:
4265 task->tk_status = -EIO;
4266 return 0;
0400a6b0 4267wait_on_recovery:
a2c0b9e2 4268 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4269 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4270 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4271 task->tk_status = 0;
4272 return -EAGAIN;
1da177e4
LT		 4273}
4274
f092075d
CL		 4275static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4276 nfs4_verifier *bootverf)
cd93710e
CL		 4277{
4278 __be32 verf[2];
4279
2c820d9a
CL		 4280 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4281 /* An impossible timestamp guarantees this value
4282 * will never match a generated boot time. */
4283 verf[0] = 0;
4284 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4285 } else {
f092075d
CL		 4286 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4287 verf[0] = (__be32)nn->boot_time.tv_sec;
4288 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4289 }
cd93710e
CL		 4290 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4291}
4292
e984a55a
CL		 4293static unsigned int
4294nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4295 char *buf, size_t len)
4296{
4297 unsigned int result;
4298
4299 rcu_read_lock();
4300 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4301 clp->cl_ipaddr,
4302 rpc_peeraddr2str(clp->cl_rpcclient,
4303 RPC_DISPLAY_ADDR),
4304 rpc_peeraddr2str(clp->cl_rpcclient,
4305 RPC_DISPLAY_PROTO));
4306 rcu_read_unlock();
4307 return result;
4308}
4309
4310static unsigned int
4311nfs4_init_uniform_client_string(const struct nfs_client *clp,
4312 char *buf, size_t len)
4313{
6f2ea7f2
CL		 4314 char *nodename = clp->cl_rpcclient->cl_nodename;
4315
4316 if (nfs4_client_id_uniquifier[0] != '\0')
4317 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4318 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4319 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4320 nodename);
e984a55a
CL		 4321}
4322
6bbb4ae8
CL		 4323/**
4324 * nfs4_proc_setclientid - Negotiate client ID
4325 * @clp: state data structure
4326 * @program: RPC program for NFSv4 callback service
4327 * @port: IP port number for NFS4 callback service
4328 * @cred: RPC credential to use for this call
4329 * @res: where to place the result
4330 *
4331 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4332 */
bb8b27e5
TM		 4333int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4334 unsigned short port, struct rpc_cred *cred,
4335 struct nfs4_setclientid_res *res)
1da177e4
LT		 4336{
4337 nfs4_verifier sc_verifier;
4338 struct nfs4_setclientid setclientid = {
4339 .sc_verifier = &sc_verifier,
4340 .sc_prog = program,
f4eecd5d 4341 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4342 };
4343 struct rpc_message msg = {
4344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4345 .rpc_argp = &setclientid,
bb8b27e5 4346 .rpc_resp = res,
286d7d6a 4347 .rpc_cred = cred,
1da177e4 4348 };
6bbb4ae8 4349 int status;
1da177e4 4350
de734831 4351 /* nfs_client_id4 */
f092075d 4352 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4353 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4354 setclientid.sc_name_len =
4355 nfs4_init_uniform_client_string(clp,
4356 setclientid.sc_name,
4357 sizeof(setclientid.sc_name));
4358 else
4359 setclientid.sc_name_len =
4360 nfs4_init_nonuniform_client_string(clp,
4361 setclientid.sc_name,
4362 sizeof(setclientid.sc_name));
de734831 4363 /* cb_client4 */
e984a55a 4364 rcu_read_lock();
de734831 4365 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4366 sizeof(setclientid.sc_netid),
4367 rpc_peeraddr2str(clp->cl_rpcclient,
4368 RPC_DISPLAY_NETID));
de734831
CL		 4369 rcu_read_unlock();
4370 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4371 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4372 clp->cl_ipaddr, port >> 8, port & 255);
4373
6bbb4ae8
CL		 4374 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4375 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4376 setclientid.sc_name_len, setclientid.sc_name);
4377 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4378 dprintk("NFS reply setclientid: %d\n", status);
4379 return status;
1da177e4
LT		 4380}
4381
6bbb4ae8
CL		 4382/**
4383 * nfs4_proc_setclientid_confirm - Confirm client ID
4384 * @clp: state data structure
4385 * @res: result of a previous SETCLIENTID
4386 * @cred: RPC credential to use for this call
4387 *
4388 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4389 */
fd954ae1 4390int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4391 struct nfs4_setclientid_res *arg,
4392 struct rpc_cred *cred)
1da177e4 4393{
1da177e4
LT		 4394 struct rpc_message msg = {
4395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4396 .rpc_argp = arg,
286d7d6a 4397 .rpc_cred = cred,
1da177e4 4398 };
1da177e4
LT		 4399 int status;
4400
6bbb4ae8
CL		 4401 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4402 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4403 clp->cl_clientid);
1bd714f2 4404 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4405 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4406 return status;
4407}
4408
fe650407
TM		 4409struct nfs4_delegreturndata {
4410 struct nfs4_delegreturnargs args;
fa178f29 4411 struct nfs4_delegreturnres res;
fe650407
TM		 4412 struct nfs_fh fh;
4413 nfs4_stateid stateid;
26e976a8 4414 unsigned long timestamp;
fa178f29 4415 struct nfs_fattr fattr;
fe650407
TM		 4416 int rpc_status;
4417};
4418
fe650407
TM		 4419static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4420{
4421 struct nfs4_delegreturndata *data = calldata;
938e1010 4422
14516c3a
TM		 4423 if (!nfs4_sequence_done(task, &data->res.seq_res))
4424 return;
938e1010 4425
79708861
RL		 4426 switch (task->tk_status) {
4427 case -NFS4ERR_STALE_STATEID:
4428 case -NFS4ERR_EXPIRED:
4429 case 0:
fa178f29 4430 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4431 break;
4432 default:
4433 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4434 -EAGAIN) {
d00c5d43 4435 rpc_restart_call_prepare(task);
79708861
RL		 4436 return;
4437 }
4438 }
4439 data->rpc_status = task->tk_status;
fe650407
TM		 4440}
4441
4442static void nfs4_delegreturn_release(void *calldata)
4443{
fe650407
TM		 4444 kfree(calldata);
4445}
4446
938e1010
AA		 4447#if defined(CONFIG_NFS_V4_1)
4448static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4449{
4450 struct nfs4_delegreturndata *d_data;
4451
4452 d_data = (struct nfs4_delegreturndata *)data;
4453
d9afbd1b
TM		 4454 nfs4_setup_sequence(d_data->res.server,
4455 &d_data->args.seq_args,
4456 &d_data->res.seq_res,
4457 task);
938e1010
AA		 4458}
4459#endif /* CONFIG_NFS_V4_1 */
4460
c8d149f3 4461static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4462#if defined(CONFIG_NFS_V4_1)
4463 .rpc_call_prepare = nfs4_delegreturn_prepare,
4464#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4465 .rpc_call_done = nfs4_delegreturn_done,
4466 .rpc_release = nfs4_delegreturn_release,
4467};
4468
e6f81075 4469static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4470{
4471 struct nfs4_delegreturndata *data;
fa178f29 4472 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4473 struct rpc_task *task;
5138fde0
TM		 4474 struct rpc_message msg = {
4475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4476 .rpc_cred = cred,
4477 };
c970aa85
TM		 4478 struct rpc_task_setup task_setup_data = {
4479 .rpc_client = server->client,
5138fde0 4480 .rpc_message = &msg,
c970aa85
TM		 4481 .callback_ops = &nfs4_delegreturn_ops,
4482 .flags = RPC_TASK_ASYNC,
4483 };
e6f81075 4484 int status = 0;
fe650407 4485
8535b2be 4486 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4487 if (data == NULL)
4488 return -ENOMEM;
9d12b216 4489 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4490 data->args.fhandle = &data->fh;
4491 data->args.stateid = &data->stateid;
9e907fec 4492 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4493 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4494 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4495 data->res.fattr = &data->fattr;
4496 data->res.server = server;
5138fde0 4497 nfs_fattr_init(data->res.fattr);
26e976a8 4498 data->timestamp = jiffies;
fe650407
TM		 4499 data->rpc_status = 0;
4500
c970aa85 4501 task_setup_data.callback_data = data;
1174dd1f
TM		 4502 msg.rpc_argp = &data->args;
4503 msg.rpc_resp = &data->res;
c970aa85 4504 task = rpc_run_task(&task_setup_data);
7a1218a2 4505 if (IS_ERR(task))
fe650407 4506 return PTR_ERR(task);
e6f81075
TM		 4507 if (!issync)
4508 goto out;
fe650407 4509 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4510 if (status != 0)
4511 goto out;
4512 status = data->rpc_status;
e144cbcc
TM		 4513 if (status == 0)
4514 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4515 else
4516 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4517out:
e6b3c4db 4518 rpc_put_task(task);
fe650407 4519 return status;
1da177e4
LT		 4520}
4521
e6f81075 4522int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4523{
4524 struct nfs_server *server = NFS_SERVER(inode);
4525 struct nfs4_exception exception = { };
4526 int err;
4527 do {
e6f81075 4528 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4529 switch (err) {
4530 case -NFS4ERR_STALE_STATEID:
4531 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4532 case 0:
4533 return 0;
4534 }
4535 err = nfs4_handle_exception(server, err, &exception);
4536 } while (exception.retry);
4537 return err;
4538}
4539
4540#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4541#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4542
4543/*
4544 * sleep, with exponential backoff, and retry the LOCK operation.
4545 */
4546static unsigned long
4547nfs4_set_lock_task_retry(unsigned long timeout)
4548{
d310310c 4549 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4550 timeout <<= 1;
4551 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4552 return NFS4_LOCK_MAXTIMEOUT;
4553 return timeout;
4554}
4555
1da177e4
LT		 4556static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4557{
4558 struct inode *inode = state->inode;
4559 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4560 struct nfs_client *clp = server->nfs_client;
911d1aaf 4561 struct nfs_lockt_args arg = {
1da177e4 4562 .fh = NFS_FH(inode),
911d1aaf 4563 .fl = request,
1da177e4 4564 };
911d1aaf
TM		 4565 struct nfs_lockt_res res = {
4566 .denied = request,
1da177e4
LT		 4567 };
4568 struct rpc_message msg = {
4569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4570 .rpc_argp = &arg,
4571 .rpc_resp = &res,
4572 .rpc_cred = state->owner->so_cred,
4573 };
1da177e4
LT		 4574 struct nfs4_lock_state *lsp;
4575 int status;
4576
911d1aaf 4577 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4578 status = nfs4_set_lock_state(state, request);
4579 if (status != 0)
4580 goto out;
4581 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4582 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4583 arg.lock_owner.s_dev = server->s_dev;
7c513058 4584 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4585 switch (status) {
4586 case 0:
4587 request->fl_type = F_UNLCK;
4588 break;
4589 case -NFS4ERR_DENIED:
4590 status = 0;
1da177e4 4591 }
70cc6487 4592 request->fl_ops->fl_release_private(request);
8d0a8a9d 4593out:
1da177e4
LT		 4594 return status;
4595}
4596
4597static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4598{
4599 struct nfs4_exception exception = { };
4600 int err;
4601
4602 do {
4603 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4604 _nfs4_proc_getlk(state, cmd, request),
4605 &exception);
4606 } while (exception.retry);
4607 return err;
4608}
4609
4610static int do_vfs_lock(struct file *file, struct file_lock *fl)
4611{
4612 int res = 0;
4613 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4614 case FL_POSIX:
4615 res = posix_lock_file_wait(file, fl);
4616 break;
4617 case FL_FLOCK:
4618 res = flock_lock_file_wait(file, fl);
4619 break;
4620 default:
4621 BUG();
4622 }
1da177e4
LT		 4623 return res;
4624}
4625
faf5f49c 4626struct nfs4_unlockdata {
911d1aaf
TM		 4627 struct nfs_locku_args arg;
4628 struct nfs_locku_res res;
faf5f49c
TM		 4629 struct nfs4_lock_state *lsp;
4630 struct nfs_open_context *ctx;
911d1aaf
TM		 4631 struct file_lock fl;
4632 const struct nfs_server *server;
26e976a8 4633 unsigned long timestamp;
faf5f49c
TM		 4634};
4635
911d1aaf
TM		 4636static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4637 struct nfs_open_context *ctx,
4638 struct nfs4_lock_state *lsp,
4639 struct nfs_seqid *seqid)
4640{
4641 struct nfs4_unlockdata *p;
4642 struct inode *inode = lsp->ls_state->inode;
4643
8535b2be 4644 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4645 if (p == NULL)
4646 return NULL;
4647 p->arg.fh = NFS_FH(inode);
4648 p->arg.fl = &p->fl;
4649 p->arg.seqid = seqid;
c1d51931 4650 p->res.seqid = seqid;
911d1aaf
TM		 4651 p->arg.stateid = &lsp->ls_stateid;
4652 p->lsp = lsp;
4653 atomic_inc(&lsp->ls_count);
4654 /* Ensure we don't close file until we're done freeing locks! */
4655 p->ctx = get_nfs_open_context(ctx);
4656 memcpy(&p->fl, fl, sizeof(p->fl));
4657 p->server = NFS_SERVER(inode);
4658 return p;
4659}
4660
06f814a3 4661static void nfs4_locku_release_calldata(void *data)
faf5f49c 4662{
963d8fe5 4663 struct nfs4_unlockdata *calldata = data;
911d1aaf 4664 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4665 nfs4_put_lock_state(calldata->lsp);
4666 put_nfs_open_context(calldata->ctx);
4667 kfree(calldata);
faf5f49c
TM		 4668}
4669
963d8fe5 4670static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4671{
963d8fe5 4672 struct nfs4_unlockdata *calldata = data;
faf5f49c 4673
14516c3a
TM		 4674 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4675 return;
faf5f49c
TM		 4676 switch (task->tk_status) {
4677 case 0:
f597c537
TM		 4678 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4679 &calldata->res.stateid);
26e976a8 4680 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4681 break;
9e33bed5
TM		 4682 case -NFS4ERR_BAD_STATEID:
4683 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4684 case -NFS4ERR_STALE_STATEID:
4685 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4686 break;
4687 default:
9e33bed5 4688 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4689 rpc_restart_call_prepare(task);
faf5f49c 4690 }
2b1bc308 4691 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4692}
4693
4ce70ada 4694static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4695{
4ce70ada 4696 struct nfs4_unlockdata *calldata = data;
faf5f49c 4697
911d1aaf 4698 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4699 goto out_wait;
795a88c9 4700 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4701 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4702 goto out_no_action;
faf5f49c 4703 }
26e976a8 4704 calldata->timestamp = jiffies;
035168ab 4705 if (nfs4_setup_sequence(calldata->server,
a893693c 4706 &calldata->arg.seq_args,
2240a9e2
TM		 4707 &calldata->res.seq_res,
4708 task) != 0)
4709 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4710 return;
4711out_no_action:
4712 task->tk_action = NULL;
4713out_wait:
4714 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4715}
4716
963d8fe5 4717static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4718 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4719 .rpc_call_done = nfs4_locku_done,
06f814a3 4720 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4721};
4722
a5d16a4d
TM		 4723static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4724 struct nfs_open_context *ctx,
4725 struct nfs4_lock_state *lsp,
4726 struct nfs_seqid *seqid)
4727{
4728 struct nfs4_unlockdata *data;
5138fde0
TM		 4729 struct rpc_message msg = {
4730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4731 .rpc_cred = ctx->cred,
4732 };
c970aa85
TM		 4733 struct rpc_task_setup task_setup_data = {
4734 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4735 .rpc_message = &msg,
c970aa85 4736 .callback_ops = &nfs4_locku_ops,
101070ca 4737 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4738 .flags = RPC_TASK_ASYNC,
4739 };
a5d16a4d 4740
137d6aca
FF		 4741 /* Ensure this is an unlock - when canceling a lock, the
4742 * canceled lock is passed in, and it won't be an unlock.
4743 */
4744 fl->fl_type = F_UNLCK;
4745
a5d16a4d
TM		 4746 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4747 if (data == NULL) {
4748 nfs_free_seqid(seqid);
4749 return ERR_PTR(-ENOMEM);
4750 }
4751
9d12b216 4752 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4753 msg.rpc_argp = &data->arg;
4754 msg.rpc_resp = &data->res;
c970aa85
TM		 4755 task_setup_data.callback_data = data;
4756 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4757}
4758
faf5f49c
TM		 4759static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4760{
65b62a29
TM		 4761 struct inode *inode = state->inode;
4762 struct nfs4_state_owner *sp = state->owner;
4763 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4764 struct nfs_seqid *seqid;
1da177e4 4765 struct nfs4_lock_state *lsp;
06f814a3
TM		 4766 struct rpc_task *task;
4767 int status = 0;
536ff0f8 4768 unsigned char fl_flags = request->fl_flags;
faf5f49c 4769
8d0a8a9d 4770 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4771 /* Unlock _before_ we do the RPC call */
4772 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4773 /* Exclude nfs_delegation_claim_locks() */
4774 mutex_lock(&sp->so_delegreturn_mutex);
4775 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4776 down_read(&nfsi->rwsem);
4777 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4778 up_read(&nfsi->rwsem);
65b62a29 4779 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4780 goto out;
19e03c57
TM		 4781 }
4782 up_read(&nfsi->rwsem);
65b62a29 4783 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4784 if (status != 0)
9b073574
TM		 4785 goto out;
4786 /* Is this a delegated lock? */
8d0a8a9d 4787 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4788 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4789 goto out;
8535b2be 4790 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4791 status = -ENOMEM;
911d1aaf 4792 if (seqid == NULL)
9b073574 4793 goto out;
cd3758e3 4794 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4795 status = PTR_ERR(task);
4796 if (IS_ERR(task))
9b073574 4797 goto out;
a5d16a4d 4798 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4799 rpc_put_task(task);
9b073574 4800out:
536ff0f8 4801 request->fl_flags = fl_flags;
1da177e4
LT		 4802 return status;
4803}
4804
a5d16a4d
TM		 4805struct nfs4_lockdata {
4806 struct nfs_lock_args arg;
4807 struct nfs_lock_res res;
4808 struct nfs4_lock_state *lsp;
4809 struct nfs_open_context *ctx;
4810 struct file_lock fl;
26e976a8 4811 unsigned long timestamp;
a5d16a4d
TM		 4812 int rpc_status;
4813 int cancelled;
66179efe 4814 struct nfs_server *server;
a5d16a4d
TM		 4815};
4816
4817static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4818 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4819 gfp_t gfp_mask)
1da177e4 4820{
a5d16a4d
TM		 4821 struct nfs4_lockdata *p;
4822 struct inode *inode = lsp->ls_state->inode;
1da177e4 4823 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4824
8535b2be 4825 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4826 if (p == NULL)
4827 return NULL;
4828
4829 p->arg.fh = NFS_FH(inode);
4830 p->arg.fl = &p->fl;
8535b2be 4831 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4832 if (p->arg.open_seqid == NULL)
4833 goto out_free;
8535b2be 4834 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4835 if (p->arg.lock_seqid == NULL)
2f74c0a0 4836 goto out_free_seqid;
a5d16a4d 4837 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4838 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4839 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4840 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4841 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4842 p->lsp = lsp;
66179efe 4843 p->server = server;
a5d16a4d
TM		 4844 atomic_inc(&lsp->ls_count);
4845 p->ctx = get_nfs_open_context(ctx);
4846 memcpy(&p->fl, fl, sizeof(p->fl));
4847 return p;
2f74c0a0
TM		 4848out_free_seqid:
4849 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4850out_free:
4851 kfree(p);
4852 return NULL;
4853}
4854
4855static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4856{
4857 struct nfs4_lockdata *data = calldata;
4858 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4859
3110ff80 4860 dprintk("%s: begin!\n", __func__);
2f74c0a0 4861 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4862 goto out_wait;
a5d16a4d
TM		 4863 /* Do we need to do an open_to_lock_owner? */
4864 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4865 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4866 goto out_release_lock_seqid;
8fe72bac 4867 }
8e472f33 4868 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4869 data->arg.new_lock_owner = 1;
c1d51931 4870 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4871 } else
4872 data->arg.new_lock_owner = 0;
5d422301
TM		 4873 if (!nfs4_valid_open_stateid(state)) {
4874 data->rpc_status = -EBADF;
4875 task->tk_action = NULL;
4876 goto out_release_open_seqid;
4877 }
26e976a8 4878 data->timestamp = jiffies;
035168ab
TM		 4879 if (nfs4_setup_sequence(data->server,
4880 &data->arg.seq_args,
2240a9e2 4881 &data->res.seq_res,
d9afbd1b 4882 task) == 0)
66179efe 4883 return;
5d422301 4884out_release_open_seqid:
2240a9e2
TM		 4885 nfs_release_seqid(data->arg.open_seqid);
4886out_release_lock_seqid:
4887 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4888out_wait:
4889 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4890 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4891}
4892
a5d16a4d
TM		 4893static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4894{
4895 struct nfs4_lockdata *data = calldata;
4896
3110ff80 4897 dprintk("%s: begin!\n", __func__);
a5d16a4d 4898
14516c3a
TM		 4899 if (!nfs4_sequence_done(task, &data->res.seq_res))
4900 return;
66179efe 4901
a5d16a4d 4902 data->rpc_status = task->tk_status;
a5d16a4d 4903 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4904 if (data->rpc_status == 0)
4905 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4906 else
4907 goto out;
4908 }
4909 if (data->rpc_status == 0) {
f597c537 4910 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4911 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4912 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4913 }
a5d16a4d 4914out:
3110ff80 4915 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4916}
4917
4918static void nfs4_lock_release(void *calldata)
4919{
4920 struct nfs4_lockdata *data = calldata;
4921
3110ff80 4922 dprintk("%s: begin!\n", __func__);
2f74c0a0 4923 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4924 if (data->cancelled != 0) {
4925 struct rpc_task *task;
4926 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4927 data->arg.lock_seqid);
4928 if (!IS_ERR(task))
bf294b41 4929 rpc_put_task_async(task);
3110ff80 4930 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4931 } else
4932 nfs_free_seqid(data->arg.lock_seqid);
4933 nfs4_put_lock_state(data->lsp);
4934 put_nfs_open_context(data->ctx);
4935 kfree(data);
3110ff80 4936 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4937}
4938
4939static const struct rpc_call_ops nfs4_lock_ops = {
4940 .rpc_call_prepare = nfs4_lock_prepare,
4941 .rpc_call_done = nfs4_lock_done,
4942 .rpc_release = nfs4_lock_release,
4943};
4944
2bee72a6
TM		 4945static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4946{
2bee72a6
TM		 4947 switch (error) {
4948 case -NFS4ERR_ADMIN_REVOKED:
4949 case -NFS4ERR_BAD_STATEID:
ecac799a 4950 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4951 if (new_lock_owner != 0 ||
795a88c9 4952 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4953 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4954 break;
4955 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4956 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4957 case -NFS4ERR_EXPIRED:
4958 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4959 };
4960}
4961
afe6c27c 4962static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4963{
4964 struct nfs4_lockdata *data;
4965 struct rpc_task *task;
5138fde0
TM		 4966 struct rpc_message msg = {
4967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4968 .rpc_cred = state->owner->so_cred,
4969 };
c970aa85
TM		 4970 struct rpc_task_setup task_setup_data = {
4971 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4972 .rpc_message = &msg,
c970aa85 4973 .callback_ops = &nfs4_lock_ops,
101070ca 4974 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4975 .flags = RPC_TASK_ASYNC,
4976 };
a5d16a4d
TM		 4977 int ret;
4978
3110ff80 4979 dprintk("%s: begin!\n", __func__);
cd3758e3 4980 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4981 fl->fl_u.nfs4_fl.owner,
4982 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4983 if (data == NULL)
4984 return -ENOMEM;
4985 if (IS_SETLKW(cmd))
4986 data->arg.block = 1;
9d12b216 4987 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4988 msg.rpc_argp = &data->arg;
4989 msg.rpc_resp = &data->res;
c970aa85 4990 task_setup_data.callback_data = data;
8fe72bac
TM		 4991 if (recovery_type > NFS_LOCK_NEW) {
4992 if (recovery_type == NFS_LOCK_RECLAIM)
4993 data->arg.reclaim = NFS_LOCK_RECLAIM;
4994 nfs4_set_sequence_privileged(&data->arg.seq_args);
4995 }
c970aa85 4996 task = rpc_run_task(&task_setup_data);
7a1218a2 4997 if (IS_ERR(task))
a5d16a4d 4998 return PTR_ERR(task);
a5d16a4d
TM		 4999 ret = nfs4_wait_for_completion_rpc_task(task);
5000 if (ret == 0) {
5001 ret = data->rpc_status;
2bee72a6
TM		 5002 if (ret)
5003 nfs4_handle_setlk_error(data->server, data->lsp,
5004 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5005 } else
5006 data->cancelled = 1;
e6b3c4db 5007 rpc_put_task(task);
3110ff80 5008 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5009 return ret;
1da177e4
LT		 5010}
5011
5012static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5013{
202b50dc 5014 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5015 struct nfs4_exception exception = {
5016 .inode = state->inode,
5017 };
202b50dc
TM		 5018 int err;
5019
5020 do {
42a2d13e
TM		 5021 /* Cache the lock if possible... */
5022 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5023 return 0;
afe6c27c 5024 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5025 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5026 break;
5027 nfs4_handle_exception(server, err, &exception);
5028 } while (exception.retry);
5029 return err;
1da177e4
LT		 5030}
5031
5032static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5033{
202b50dc 5034 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5035 struct nfs4_exception exception = {
5036 .inode = state->inode,
5037 };
202b50dc
TM		 5038 int err;
5039
6bfc93ef
TM		 5040 err = nfs4_set_lock_state(state, request);
5041 if (err != 0)
5042 return err;
202b50dc 5043 do {
42a2d13e
TM		 5044 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5045 return 0;
afe6c27c 5046 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5047 switch (err) {
5048 default:
5049 goto out;
5050 case -NFS4ERR_GRACE:
5051 case -NFS4ERR_DELAY:
5052 nfs4_handle_exception(server, err, &exception);
5053 err = 0;
5054 }
202b50dc 5055 } while (exception.retry);
a9ed2e25 5056out:
202b50dc 5057 return err;
1da177e4
LT		 5058}
5059
f062eb6c 5060#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5061/**
5062 * nfs41_check_expired_locks - possibly free a lock stateid
5063 *
5064 * @state: NFSv4 state for an inode
5065 *
5066 * Returns NFS_OK if recovery for this stateid is now finished.
5067 * Otherwise a negative NFS4ERR value is returned.
5068 */
b01dd1d8 5069static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5070{
eb64cf96 5071 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5072 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5073 struct nfs_server *server = NFS_SERVER(state->inode);
5074
b01dd1d8 5075 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5076 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5077 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5078
5079 status = nfs41_test_stateid(server,
5080 &lsp->ls_stateid,
5081 cred);
b01dd1d8 5082 if (status != NFS_OK) {
3e60ffdd
CL		 5083 /* Free the stateid unless the server
5084 * informs us the stateid is unrecognized. */
89af2739
CL		 5085 if (status != -NFS4ERR_BAD_STATEID)
5086 nfs41_free_stateid(server,
ab7cb0df
TM		 5087 &lsp->ls_stateid,
5088 cred);
795a88c9 5089 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5090 ret = status;
5091 }
5092 }
5093 };
5094
5095 return ret;
5096}
5097
5098static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5099{
5100 int status = NFS_OK;
5101
5102 if (test_bit(LK_STATE_IN_USE, &state->flags))
5103 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5104 if (status != NFS_OK)
5105 status = nfs4_lock_expired(state, request);
5106 return status;
f062eb6c
BS		 5107}
5108#endif
5109
1da177e4
LT		 5110static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5111{
9a99af49 5112 struct nfs4_state_owner *sp = state->owner;
19e03c57 5113 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5114 unsigned char fl_flags = request->fl_flags;
9a99af49 5115 unsigned int seq;
8e469ebd 5116 int status = -ENOLCK;
1da177e4 5117
8e469ebd
TM		 5118 if ((fl_flags & FL_POSIX) &&
5119 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5120 goto out;
6bfc93ef 5121 /* Is this a delegated open? */
6bfc93ef
TM		 5122 status = nfs4_set_lock_state(state, request);
5123 if (status != 0)
5124 goto out;
01c3b861
TM		 5125 request->fl_flags |= FL_ACCESS;
5126 status = do_vfs_lock(request->fl_file, request);
5127 if (status < 0)
5128 goto out;
19e03c57 5129 down_read(&nfsi->rwsem);
01c3b861 5130 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5131 /* Yes: cache locks! */
01c3b861 5132 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5133 request->fl_flags = fl_flags & ~FL_SLEEP;
5134 status = do_vfs_lock(request->fl_file, request);
5135 goto out_unlock;
01c3b861 5136 }
9a99af49
TM		 5137 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5138 up_read(&nfsi->rwsem);
afe6c27c 5139 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5140 if (status != 0)
9a99af49
TM		 5141 goto out;
5142 down_read(&nfsi->rwsem);
5143 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5144 status = -NFS4ERR_DELAY;
01c3b861 5145 goto out_unlock;
9a99af49 5146 }
6bfc93ef 5147 /* Note: we always want to sleep here! */
01c3b861 5148 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5149 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5150 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5151 "manager!\n", __func__);
01c3b861 5152out_unlock:
19e03c57 5153 up_read(&nfsi->rwsem);
01c3b861
TM		 5154out:
5155 request->fl_flags = fl_flags;
1da177e4
LT		 5156 return status;
5157}
5158
5159static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5160{
a1d0b5ee
TM		 5161 struct nfs4_exception exception = {
5162 .state = state,
05ffe24f 5163 .inode = state->inode,
a1d0b5ee 5164 };
1da177e4
LT		 5165 int err;
5166
5167 do {
965b5d67
TM		 5168 err = _nfs4_proc_setlk(state, cmd, request);
5169 if (err == -NFS4ERR_DENIED)
5170 err = -EAGAIN;
1da177e4 5171 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5172 err, &exception);
1da177e4
LT		 5173 } while (exception.retry);
5174 return err;
5175}
5176
5177static int
5178nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5179{
5180 struct nfs_open_context *ctx;
5181 struct nfs4_state *state;
5182 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5183 int status;
5184
5185 /* verify open state */
cd3758e3 5186 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5187 state = ctx->state;
5188
5189 if (request->fl_start < 0 || request->fl_end < 0)
5190 return -EINVAL;
5191
d953126a
TM		 5192 if (IS_GETLK(cmd)) {
5193 if (state != NULL)
5194 return nfs4_proc_getlk(state, F_GETLK, request);
5195 return 0;
5196 }
1da177e4
LT		 5197
5198 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5199 return -EINVAL;
5200
d953126a
TM		 5201 if (request->fl_type == F_UNLCK) {
5202 if (state != NULL)
5203 return nfs4_proc_unlck(state, cmd, request);
5204 return 0;
5205 }
1da177e4 5206
d953126a
TM		 5207 if (state == NULL)
5208 return -ENOLCK;
55725513
TM		 5209 /*
5210 * Don't rely on the VFS having checked the file open mode,
5211 * since it won't do this for flock() locks.
5212 */
f44106e2 5213 switch (request->fl_type) {
55725513
TM		 5214 case F_RDLCK:
5215 if (!(filp->f_mode & FMODE_READ))
5216 return -EBADF;
5217 break;
5218 case F_WRLCK:
5219 if (!(filp->f_mode & FMODE_WRITE))
5220 return -EBADF;
5221 }
5222
1da177e4
LT		 5223 do {
5224 status = nfs4_proc_setlk(state, cmd, request);
5225 if ((status != -EAGAIN) || IS_SETLK(cmd))
5226 break;
5227 timeout = nfs4_set_lock_task_retry(timeout);
5228 status = -ERESTARTSYS;
5229 if (signalled())
5230 break;
5231 } while(status < 0);
1da177e4
LT		 5232 return status;
5233}
5234
db4f2e63 5235int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5236{
5237 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5238 int err;
5239
5240 err = nfs4_set_lock_state(state, fl);
5241 if (err != 0)
db4f2e63 5242 return err;
4a706fa0 5243 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5244 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5245}
6b3b5496 5246
cf470c3e
TM		 5247struct nfs_release_lockowner_data {
5248 struct nfs4_lock_state *lsp;
5ae67c4f 5249 struct nfs_server *server;
cf470c3e
TM		 5250 struct nfs_release_lockowner_args args;
5251};
5252
d3c7b7cc
TM		 5253static void nfs4_release_lockowner_release(void *calldata)
5254{
cf470c3e 5255 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5256 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5257 kfree(calldata);
5258}
5259
17280175 5260static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5261 .rpc_release = nfs4_release_lockowner_release,
5262};
5263
c8b2d0bf 5264static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5265{
cf470c3e 5266 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5267 struct rpc_message msg = {
5268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5269 };
5270
5271 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5272 return -EINVAL;
5273 data = kmalloc(sizeof(*data), GFP_NOFS);
5274 if (!data)
5275 return -ENOMEM;
5276 data->lsp = lsp;
5ae67c4f 5277 data->server = server;
cf470c3e
TM		 5278 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5279 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5280 data->args.lock_owner.s_dev = server->s_dev;
5281 msg.rpc_argp = &data->args;
5282 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5283 return 0;
d3c7b7cc
TM		 5284}
5285
aa1870af
BF		 5286#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5287
64c2ce8b
AK		 5288static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5289 const void *buf, size_t buflen,
5290 int flags, int type)
6b3b5496 5291{
64c2ce8b
AK		 5292 if (strcmp(key, "") != 0)
5293 return -EINVAL;
4b580ee3 5294
64c2ce8b 5295 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5296}
5297
64c2ce8b
AK		 5298static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5299 void *buf, size_t buflen, int type)
6b3b5496 5300{
64c2ce8b
AK		 5301 if (strcmp(key, "") != 0)
5302 return -EINVAL;
aa1870af 5303
64c2ce8b 5304 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5305}
5306
64c2ce8b
AK		 5307static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5308 size_t list_len, const char *name,
5309 size_t name_len, int type)
6b3b5496 5310{
64c2ce8b 5311 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5312
096455a2
BF		 5313 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5314 return 0;
64c2ce8b
AK		 5315
5316 if (list && len <= list_len)
5317 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5318 return len;
6b3b5496
BF		 5319}
5320
533eb461
AA		 5321/*
5322 * nfs_fhget will use either the mounted_on_fileid or the fileid
5323 */
69aaaae1
TM		 5324static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5325{
533eb461
AA		 5326 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5327 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5328 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5329 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5330 return;
5331
5332 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5333 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5334 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5335 fattr->nlink = 2;
5336}
5337
f05d147f
BS		 5338static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5339 const struct qstr *name,
5340 struct nfs4_fs_locations *fs_locations,
5341 struct page *page)
683b57b4
TM		 5342{
5343 struct nfs_server *server = NFS_SERVER(dir);
5344 u32 bitmask[2] = {
361e624f 5345 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5346 };
5347 struct nfs4_fs_locations_arg args = {
5348 .dir_fh = NFS_FH(dir),
c228fd3a 5349 .name = name,
683b57b4
TM		 5350 .page = page,
5351 .bitmask = bitmask,
5352 };
22958463
BH		 5353 struct nfs4_fs_locations_res res = {
5354 .fs_locations = fs_locations,
5355 };
683b57b4
TM		 5356 struct rpc_message msg = {
5357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5358 .rpc_argp = &args,
22958463 5359 .rpc_resp = &res,
683b57b4
TM		 5360 };
5361 int status;
5362
3110ff80 5363 dprintk("%s: start\n", __func__);
533eb461
AA		 5364
5365 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5366 * is not supported */
5367 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5368 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5369 else
5370 bitmask[0] |= FATTR4_WORD0_FILEID;
5371
c228fd3a 5372 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5373 fs_locations->server = server;
830b8e33 5374 fs_locations->nlocations = 0;
f05d147f 5375 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5376 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5377 return status;
5378}
5379
f05d147f
BS		 5380int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5381 const struct qstr *name,
5382 struct nfs4_fs_locations *fs_locations,
5383 struct page *page)
db0a9593
BS		 5384{
5385 struct nfs4_exception exception = { };
5386 int err;
5387 do {
5388 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5389 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5390 &exception);
5391 } while (exception.retry);
5392 return err;
5393}
5394
5a5ea0d4
BS		 5395static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5396{
5397 int status;
5398 struct nfs4_secinfo_arg args = {
5399 .dir_fh = NFS_FH(dir),
5400 .name = name,
5401 };
5402 struct nfs4_secinfo_res res = {
5403 .flavors = flavors,
5404 };
5405 struct rpc_message msg = {
5406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5407 .rpc_argp = &args,
5408 .rpc_resp = &res,
5409 };
5410
5411 dprintk("NFS call secinfo %s\n", name->name);
5412 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5413 dprintk("NFS reply secinfo: %d\n", status);
5414 return status;
5415}
5416
72de53ec
BS		 5417int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5418 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5419{
5420 struct nfs4_exception exception = { };
5421 int err;
5422 do {
5423 err = nfs4_handle_exception(NFS_SERVER(dir),
5424 _nfs4_proc_secinfo(dir, name, flavors),
5425 &exception);
5426 } while (exception.retry);
5427 return err;
5428}
5429
557134a3 5430#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5431/*
5432 * Check the exchange flags returned by the server for invalid flags, having
5433 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5434 * DS flags set.
5435 */
5436static int nfs4_check_cl_exchange_flags(u32 flags)
5437{
5438 if (flags & ~EXCHGID4_FLAG_MASK_R)
5439 goto out_inval;
5440 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5441 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5442 goto out_inval;
5443 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5444 goto out_inval;
5445 return NFS_OK;
5446out_inval:
5447 return -NFS4ERR_INVAL;
5448}
5449
78fe0f41 5450static bool
79d4e1f0
CL		 5451nfs41_same_server_scope(struct nfs41_server_scope *a,
5452 struct nfs41_server_scope *b)
78fe0f41
WAA		 5453{
5454 if (a->server_scope_sz == b->server_scope_sz &&
5455 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5456 return true;
5457
5458 return false;
5459}
5460
7c44f1ae
WAA		 5461/*
5462 * nfs4_proc_bind_conn_to_session()
5463 *
5464 * The 4.1 client currently uses the same TCP connection for the
5465 * fore and backchannel.
5466 */
2cf047c9 5467int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5468{
5469 int status;
5470 struct nfs41_bind_conn_to_session_res res;
5471 struct rpc_message msg = {
5472 .rpc_proc =
5473 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5474 .rpc_argp = clp,
5475 .rpc_resp = &res,
2cf047c9 5476 .rpc_cred = cred,
7c44f1ae
WAA		 5477 };
5478
5479 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5480
5481 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5482 if (unlikely(res.session == NULL)) {
5483 status = -ENOMEM;
5484 goto out;
5485 }
5486
5487 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5488 if (status == 0) {
5489 if (memcmp(res.session->sess_id.data,
5490 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5491 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5492 status = -EIO;
5493 goto out_session;
5494 }
5495 if (res.dir != NFS4_CDFS4_BOTH) {
5496 dprintk("NFS: %s: Unexpected direction from server\n",
5497 __func__);
5498 status = -EIO;
5499 goto out_session;
5500 }
5501 if (res.use_conn_in_rdma_mode) {
5502 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5503 __func__);
5504 status = -EIO;
5505 goto out_session;
5506 }
5507 }
5508out_session:
5509 kfree(res.session);
5510out:
5511 dprintk("<-- %s status= %d\n", __func__, status);
5512 return status;
5513}
5514
99fe60d0
BH		 5515/*
5516 * nfs4_proc_exchange_id()
5517 *
6bbb4ae8
CL		 5518 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5519 *
99fe60d0
BH		 5520 * Since the clientid has expired, all compounds using sessions
5521 * associated with the stale clientid will be returning
5522 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5523 * be in some phase of session reset.
5524 */
4d643d1d 5525int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5526{
5527 nfs4_verifier verifier;
5528 struct nfs41_exchange_id_args args = {
cd93710e 5529 .verifier = &verifier,
99fe60d0 5530 .client = clp,
357f54d6 5531 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5532 };
5533 struct nfs41_exchange_id_res res = {
32b01310 5534 0
99fe60d0
BH		 5535 };
5536 int status;
5537 struct rpc_message msg = {
5538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5539 .rpc_argp = &args,
5540 .rpc_resp = &res,
5541 .rpc_cred = cred,
5542 };
99fe60d0 5543
f092075d 5544 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5545 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5546 sizeof(args.id));
6bbb4ae8
CL		 5547 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5548 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5549 args.id_len, args.id);
99fe60d0 5550
acdeb69d 5551 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5552 GFP_NOFS);
acdeb69d 5553 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5554 status = -ENOMEM;
5555 goto out;
5556 }
78fe0f41 5557
79d4e1f0 5558 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5559 GFP_NOFS);
177313f1 5560 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5561 status = -ENOMEM;
acdeb69d 5562 goto out_server_owner;
abe9a6d5 5563 }
78fe0f41 5564
bbafffd2 5565 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5566 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5567 status = -ENOMEM;
5568 goto out_server_scope;
5569 }
5570
1bd714f2 5571 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5572 if (status == 0)
32b01310 5573 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5574
acdeb69d 5575 if (status == 0) {
32b01310
TM		 5576 clp->cl_clientid = res.clientid;
5577 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5578 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5579 clp->cl_seqid = res.seqid;
5580
acdeb69d
CL		 5581 kfree(clp->cl_serverowner);
5582 clp->cl_serverowner = res.server_owner;
5583 res.server_owner = NULL;
78fe0f41 5584
7d2ed9ac 5585 /* use the most recent implementation id */
59155546
CL		 5586 kfree(clp->cl_implid);
5587 clp->cl_implid = res.impl_id;
7d2ed9ac 5588
177313f1 5589 if (clp->cl_serverscope != NULL &&
79d4e1f0 5590 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5591 res.server_scope)) {
5592 dprintk("%s: server_scope mismatch detected\n",
5593 __func__);
5594 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5595 kfree(clp->cl_serverscope);
5596 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5597 }
5598
177313f1 5599 if (clp->cl_serverscope == NULL) {
79d4e1f0 5600 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5601 goto out;
5602 }
32b01310
TM		 5603 } else
5604 kfree(res.impl_id);
7d2ed9ac 5605
acdeb69d
CL		 5606out_server_owner:
5607 kfree(res.server_owner);
7d2ed9ac 5608out_server_scope:
abe9a6d5
WAA		 5609 kfree(res.server_scope);
5610out:
177313f1 5611 if (clp->cl_implid != NULL)
6bbb4ae8 5612 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5613 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5614 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5615 clp->cl_implid->date.seconds,
5616 clp->cl_implid->date.nseconds);
6bbb4ae8 5617 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5618 return status;
5619}
5620
66245539
TM		 5621static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5622 struct rpc_cred *cred)
5623{
5624 struct rpc_message msg = {
5625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5626 .rpc_argp = clp,
5627 .rpc_cred = cred,
5628 };
5629 int status;
5630
5631 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5632 if (status)
02c67525 5633 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5634 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5635 return status;
5636}
5637
5638static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5639 struct rpc_cred *cred)
5640{
5641 unsigned int loop;
5642 int ret;
5643
5644 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5645 ret = _nfs4_proc_destroy_clientid(clp, cred);
5646 switch (ret) {
5647 case -NFS4ERR_DELAY:
5648 case -NFS4ERR_CLIENTID_BUSY:
5649 ssleep(1);
5650 break;
5651 default:
5652 return ret;
5653 }
5654 }
5655 return 0;
5656}
5657
5658int nfs4_destroy_clientid(struct nfs_client *clp)
5659{
5660 struct rpc_cred *cred;
5661 int ret = 0;
5662
5663 if (clp->cl_mvops->minor_version < 1)
5664 goto out;
5665 if (clp->cl_exchange_flags == 0)
5666 goto out;
05f4c350
CL		 5667 if (clp->cl_preserve_clid)
5668 goto out;
66245539
TM		 5669 cred = nfs4_get_exchange_id_cred(clp);
5670 ret = nfs4_proc_destroy_clientid(clp, cred);
5671 if (cred)
5672 put_rpccred(cred);
5673 switch (ret) {
5674 case 0:
5675 case -NFS4ERR_STALE_CLIENTID:
5676 clp->cl_exchange_flags = 0;
5677 }
5678out:
5679 return ret;
5680}
5681
2050f0cc
AA		 5682struct nfs4_get_lease_time_data {
5683 struct nfs4_get_lease_time_args *args;
5684 struct nfs4_get_lease_time_res *res;
5685 struct nfs_client *clp;
5686};
5687
5688static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5689 void *calldata)
5690{
2050f0cc
AA		 5691 struct nfs4_get_lease_time_data *data =
5692 (struct nfs4_get_lease_time_data *)calldata;
5693
5694 dprintk("--> %s\n", __func__);
5695 /* just setup sequence, do not trigger session recovery
5696 since we're invoked within one */
d9afbd1b
TM		 5697 nfs41_setup_sequence(data->clp->cl_session,
5698 &data->args->la_seq_args,
5699 &data->res->lr_seq_res,
5700 task);
2050f0cc
AA		 5701 dprintk("<-- %s\n", __func__);
5702}
5703
5704/*
5705 * Called from nfs4_state_manager thread for session setup, so don't recover
5706 * from sequence operation or clientid errors.
5707 */
5708static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5709{
5710 struct nfs4_get_lease_time_data *data =
5711 (struct nfs4_get_lease_time_data *)calldata;
5712
5713 dprintk("--> %s\n", __func__);
14516c3a
TM		 5714 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5715 return;
2050f0cc
AA		 5716 switch (task->tk_status) {
5717 case -NFS4ERR_DELAY:
5718 case -NFS4ERR_GRACE:
5719 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5720 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5721 task->tk_status = 0;
a8a4ae3a
AA		 5722 /* fall through */
5723 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5724 rpc_restart_call_prepare(task);
2050f0cc
AA		 5725 return;
5726 }
2050f0cc
AA		 5727 dprintk("<-- %s\n", __func__);
5728}
5729
17280175 5730static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5731 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5732 .rpc_call_done = nfs4_get_lease_time_done,
5733};
5734
5735int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5736{
5737 struct rpc_task *task;
5738 struct nfs4_get_lease_time_args args;
5739 struct nfs4_get_lease_time_res res = {
5740 .lr_fsinfo = fsinfo,
5741 };
5742 struct nfs4_get_lease_time_data data = {
5743 .args = &args,
5744 .res = &res,
5745 .clp = clp,
5746 };
5747 struct rpc_message msg = {
5748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5749 .rpc_argp = &args,
5750 .rpc_resp = &res,
5751 };
5752 struct rpc_task_setup task_setup = {
5753 .rpc_client = clp->cl_rpcclient,
5754 .rpc_message = &msg,
5755 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5756 .callback_data = &data,
5757 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5758 };
5759 int status;
5760
9d12b216 5761 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5762 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5763 dprintk("--> %s\n", __func__);
5764 task = rpc_run_task(&task_setup);
5765
5766 if (IS_ERR(task))
5767 status = PTR_ERR(task);
5768 else {
5769 status = task->tk_status;
5770 rpc_put_task(task);
5771 }
5772 dprintk("<-- %s return %d\n", __func__, status);
5773
5774 return status;
5775}
5776
fc931582
AA		 5777/*
5778 * Initialize the values to be used by the client in CREATE_SESSION
5779 * If nfs4_init_session set the fore channel request and response sizes,
5780 * use them.
5781 *
5782 * Set the back channel max_resp_sz_cached to zero to force the client to
5783 * always set csa_cachethis to FALSE because the current implementation
5784 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5785 */
5786static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5787{
5788 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5789 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5790 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5791
5792 if (mxrqst_sz == 0)
5793 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5794 if (mxresp_sz == 0)
5795 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5796 /* Fore channel attributes */
fc931582
AA		 5797 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5798 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5799 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5800 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5801
5802 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5803 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5804 __func__,
5805 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5806 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5807
5808 /* Back channel attributes */
fc931582
AA		 5809 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5810 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5811 args->bc_attrs.max_resp_sz_cached = 0;
5812 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5813 args->bc_attrs.max_reqs = 1;
5814
5815 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5816 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5817 __func__,
5818 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5819 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5820 args->bc_attrs.max_reqs);
5821}
5822
43c2e885 5823static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5824{
43c2e885
BF		 5825 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5826 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5827
43c2e885
BF		 5828 if (rcvd->max_resp_sz > sent->max_resp_sz)
5829 return -EINVAL;
5830 /*
5831 * Our requested max_ops is the minimum we need; we're not
5832 * prepared to break up compounds into smaller pieces than that.
5833 * So, no point even trying to continue if the server won't
5834 * cooperate:
5835 */
5836 if (rcvd->max_ops < sent->max_ops)
5837 return -EINVAL;
5838 if (rcvd->max_reqs == 0)
5839 return -EINVAL;
b4b9a0c1
VG		 5840 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5841 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5842 return 0;
8d35301d
AA		 5843}
5844
43c2e885
BF		 5845static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5846{
5847 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5848 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5849
43c2e885
BF		 5850 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5851 return -EINVAL;
5852 if (rcvd->max_resp_sz < sent->max_resp_sz)
5853 return -EINVAL;
5854 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5855 return -EINVAL;
5856 /* These would render the backchannel useless: */
b4b9a0c1 5857 if (rcvd->max_ops != sent->max_ops)
43c2e885 5858 return -EINVAL;
b4b9a0c1 5859 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5860 return -EINVAL;
5861 return 0;
5862}
8d35301d 5863
8d35301d
AA		 5864static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5865 struct nfs4_session *session)
5866{
43c2e885 5867 int ret;
8d35301d 5868
43c2e885
BF		 5869 ret = nfs4_verify_fore_channel_attrs(args, session);
5870 if (ret)
5871 return ret;
5872 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5873}
5874
848f5bda
TM		 5875static int _nfs4_proc_create_session(struct nfs_client *clp,
5876 struct rpc_cred *cred)
fc931582
AA		 5877{
5878 struct nfs4_session *session = clp->cl_session;
5879 struct nfs41_create_session_args args = {
5880 .client = clp,
5881 .cb_program = NFS4_CALLBACK,
5882 };
5883 struct nfs41_create_session_res res = {
5884 .client = clp,
5885 };
5886 struct rpc_message msg = {
5887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5888 .rpc_argp = &args,
5889 .rpc_resp = &res,
848f5bda 5890 .rpc_cred = cred,
fc931582
AA		 5891 };
5892 int status;
5893
5894 nfs4_init_channel_attrs(&args);
0f91421e 5895 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5896
1bd714f2 5897 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5898
43095d39 5899 if (!status) {
8d35301d
AA		 5900 /* Verify the session's negotiated channel_attrs values */
5901 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5902 /* Increment the clientid slot sequence id */
5903 clp->cl_seqid++;
5904 }
5905
5906 return status;
5907}
5908
5909/*
5910 * Issues a CREATE_SESSION operation to the server.
5911 * It is the responsibility of the caller to verify the session is
5912 * expired before calling this routine.
5913 */
848f5bda 5914int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5915{
5916 int status;
5917 unsigned *ptr;
fc931582
AA		 5918 struct nfs4_session *session = clp->cl_session;
5919
5920 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5921
848f5bda 5922 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5923 if (status)
5924 goto out;
5925
aacd5537
AA		 5926 /* Init or reset the session slot tables */
5927 status = nfs4_setup_session_slot_tables(session);
5928 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5929 if (status)
5930 goto out;
5931
5932 ptr = (unsigned *)&session->sess_id.data[0];
5933 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5934 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5935out:
5936 dprintk("<-- %s\n", __func__);
5937 return status;
5938}
5939
0f3e66c6
AA		 5940/*
5941 * Issue the over-the-wire RPC DESTROY_SESSION.
5942 * The caller must serialize access to this routine.
5943 */
848f5bda
TM		 5944int nfs4_proc_destroy_session(struct nfs4_session *session,
5945 struct rpc_cred *cred)
0f3e66c6 5946{
848f5bda
TM		 5947 struct rpc_message msg = {
5948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5949 .rpc_argp = session,
5950 .rpc_cred = cred,
5951 };
0f3e66c6 5952 int status = 0;
0f3e66c6
AA		 5953
5954 dprintk("--> nfs4_proc_destroy_session\n");
5955
5956 /* session is still being setup */
5957 if (session->clp->cl_cons_state != NFS_CS_READY)
5958 return status;
5959
1bd714f2 5960 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5961
5962 if (status)
08106ac7 5963 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5964 "Session has been destroyed regardless...\n", status);
5965
5966 dprintk("<-- nfs4_proc_destroy_session\n");
5967 return status;
5968}
5969
fc01cea9
AA		 5970/*
5971 * Renew the cl_session lease.
5972 */
d5f8d3fe
TM		 5973struct nfs4_sequence_data {
5974 struct nfs_client *clp;
5975 struct nfs4_sequence_args args;
5976 struct nfs4_sequence_res res;
5977};
5978
dc96aef9
AB		 5979static void nfs41_sequence_release(void *data)
5980{
d5f8d3fe
TM		 5981 struct nfs4_sequence_data *calldata = data;
5982 struct nfs_client *clp = calldata->clp;
dc96aef9 5983
7135840f
AB		 5984 if (atomic_read(&clp->cl_count) > 1)
5985 nfs4_schedule_state_renewal(clp);
5986 nfs_put_client(clp);
d5f8d3fe 5987 kfree(calldata);
dc96aef9
AB		 5988}
5989
aa5190d0
TM		 5990static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5991{
5992 switch(task->tk_status) {
5993 case -NFS4ERR_DELAY:
aa5190d0
TM		 5994 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5995 return -EAGAIN;
5996 default:
0400a6b0 5997 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5998 }
5999 return 0;
6000}
6001
dc96aef9 6002static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6003{
d5f8d3fe
TM		 6004 struct nfs4_sequence_data *calldata = data;
6005 struct nfs_client *clp = calldata->clp;
fc01cea9 6006
14516c3a
TM		 6007 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6008 return;
fc01cea9
AA		 6009
6010 if (task->tk_status < 0) {
6011 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6012 if (atomic_read(&clp->cl_count) == 1)
6013 goto out;
fc01cea9 6014
aa5190d0
TM		 6015 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6016 rpc_restart_call_prepare(task);
fc01cea9
AA		 6017 return;
6018 }
6019 }
fc01cea9 6020 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6021out:
fc01cea9
AA		 6022 dprintk("<-- %s\n", __func__);
6023}
6024
6025static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6026{
d5f8d3fe
TM		 6027 struct nfs4_sequence_data *calldata = data;
6028 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6029 struct nfs4_sequence_args *args;
6030 struct nfs4_sequence_res *res;
6031
fc01cea9
AA		 6032 args = task->tk_msg.rpc_argp;
6033 res = task->tk_msg.rpc_resp;
6034
d9afbd1b 6035 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6036}
6037
6038static const struct rpc_call_ops nfs41_sequence_ops = {
6039 .rpc_call_done = nfs41_sequence_call_done,
6040 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6041 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6042};
6043
8fe72bac
TM		 6044static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6045 struct rpc_cred *cred,
6046 bool is_privileged)
fc01cea9 6047{
d5f8d3fe 6048 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6049 struct rpc_message msg = {
6050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6051 .rpc_cred = cred,
6052 };
71ac6da9
TM		 6053 struct rpc_task_setup task_setup_data = {
6054 .rpc_client = clp->cl_rpcclient,
6055 .rpc_message = &msg,
8fe72bac 6056 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6057 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6058 };
fc01cea9 6059
7135840f 6060 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6061 return ERR_PTR(-EIO);
dfb4f309 6062 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6063 if (calldata == NULL) {
7135840f 6064 nfs_put_client(clp);
71ac6da9 6065 return ERR_PTR(-ENOMEM);
fc01cea9 6066 }
9d12b216 6067 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6068 if (is_privileged)
6069 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6070 msg.rpc_argp = &calldata->args;
6071 msg.rpc_resp = &calldata->res;
6072 calldata->clp = clp;
71ac6da9 6073 task_setup_data.callback_data = calldata;
fc01cea9 6074
71ac6da9
TM		 6075 return rpc_run_task(&task_setup_data);
6076}
6077
2f60ea6b 6078static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6079{
6080 struct rpc_task *task;
6081 int ret = 0;
6082
2f60ea6b
TM		 6083 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6084 return 0;
8fe72bac 6085 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6086 if (IS_ERR(task))
6087 ret = PTR_ERR(task);
6088 else
bf294b41 6089 rpc_put_task_async(task);
71ac6da9
TM		 6090 dprintk("<-- %s status=%d\n", __func__, ret);
6091 return ret;
6092}
6093
6094static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6095{
6096 struct rpc_task *task;
6097 int ret;
6098
8fe72bac 6099 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6100 if (IS_ERR(task)) {
6101 ret = PTR_ERR(task);
6102 goto out;
6103 }
6104 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6105 if (!ret) {
6106 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6107
6108 if (task->tk_status == 0)
6109 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6110 ret = task->tk_status;
b4410c2f 6111 }
71ac6da9
TM		 6112 rpc_put_task(task);
6113out:
6114 dprintk("<-- %s status=%d\n", __func__, ret);
6115 return ret;
fc01cea9
AA		 6116}
6117
fce5c838
RL		 6118struct nfs4_reclaim_complete_data {
6119 struct nfs_client *clp;
6120 struct nfs41_reclaim_complete_args arg;
6121 struct nfs41_reclaim_complete_res res;
6122};
6123
6124static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6125{
6126 struct nfs4_reclaim_complete_data *calldata = data;
6127
d9afbd1b
TM		 6128 nfs41_setup_sequence(calldata->clp->cl_session,
6129 &calldata->arg.seq_args,
6130 &calldata->res.seq_res,
6131 task);
fce5c838
RL		 6132}
6133
aa5190d0
TM		 6134static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6135{
6136 switch(task->tk_status) {
6137 case 0:
6138 case -NFS4ERR_COMPLETE_ALREADY:
6139 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6140 break;
6141 case -NFS4ERR_DELAY:
aa5190d0 6142 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6143 /* fall through */
6144 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6145 return -EAGAIN;
6146 default:
0400a6b0 6147 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6148 }
6149 return 0;
6150}
6151
fce5c838
RL		 6152static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6153{
6154 struct nfs4_reclaim_complete_data *calldata = data;
6155 struct nfs_client *clp = calldata->clp;
6156 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6157
6158 dprintk("--> %s\n", __func__);
14516c3a
TM		 6159 if (!nfs41_sequence_done(task, res))
6160 return;
fce5c838 6161
aa5190d0
TM		 6162 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6163 rpc_restart_call_prepare(task);
6164 return;
6165 }
fce5c838
RL		 6166 dprintk("<-- %s\n", __func__);
6167}
6168
6169static void nfs4_free_reclaim_complete_data(void *data)
6170{
6171 struct nfs4_reclaim_complete_data *calldata = data;
6172
6173 kfree(calldata);
6174}
6175
6176static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6177 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6178 .rpc_call_done = nfs4_reclaim_complete_done,
6179 .rpc_release = nfs4_free_reclaim_complete_data,
6180};
6181
6182/*
6183 * Issue a global reclaim complete.
6184 */
965e9c23
TM		 6185static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6186 struct rpc_cred *cred)
fce5c838
RL		 6187{
6188 struct nfs4_reclaim_complete_data *calldata;
6189 struct rpc_task *task;
6190 struct rpc_message msg = {
6191 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6192 .rpc_cred = cred,
fce5c838
RL		 6193 };
6194 struct rpc_task_setup task_setup_data = {
6195 .rpc_client = clp->cl_rpcclient,
6196 .rpc_message = &msg,
6197 .callback_ops = &nfs4_reclaim_complete_call_ops,
6198 .flags = RPC_TASK_ASYNC,
6199 };
6200 int status = -ENOMEM;
6201
6202 dprintk("--> %s\n", __func__);
8535b2be 6203 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6204 if (calldata == NULL)
6205 goto out;
6206 calldata->clp = clp;
6207 calldata->arg.one_fs = 0;
fce5c838 6208
9d12b216 6209 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6210 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6211 msg.rpc_argp = &calldata->arg;
6212 msg.rpc_resp = &calldata->res;
6213 task_setup_data.callback_data = calldata;
6214 task = rpc_run_task(&task_setup_data);
acf82b85 6215 if (IS_ERR(task)) {
fce5c838 6216 status = PTR_ERR(task);
acf82b85
DC		 6217 goto out;
6218 }
c34c32ea
AA		 6219 status = nfs4_wait_for_completion_rpc_task(task);
6220 if (status == 0)
6221 status = task->tk_status;
fce5c838 6222 rpc_put_task(task);
acf82b85 6223 return 0;
fce5c838
RL		 6224out:
6225 dprintk("<-- %s status=%d\n", __func__, status);
6226 return status;
6227}
b1f69b75
AA		 6228
6229static void
6230nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6231{
6232 struct nfs4_layoutget *lgp = calldata;
c31663d4 6233 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6234 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6235
6236 dprintk("--> %s\n", __func__);
c31663d4
FI		 6237 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6238 * right now covering the LAYOUTGET we are about to send.
6239 * However, that is not so catastrophic, and there seems
6240 * to be no way to prevent it completely.
6241 */
6ba7db34 6242 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6243 &lgp->res.seq_res, task))
b1f69b75 6244 return;
cf7d63f1
FI		 6245 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6246 NFS_I(lgp->args.inode)->layout,
6247 lgp->args.ctx->state)) {
6248 rpc_exit(task, NFS4_OK);
cf7d63f1 6249 }
b1f69b75
AA		 6250}
6251
6252static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6253{
6254 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6255 struct inode *inode = lgp->args.inode;
6256 struct nfs_server *server = NFS_SERVER(inode);
6257 struct pnfs_layout_hdr *lo;
6258 struct nfs4_state *state = NULL;
30005121 6259 unsigned long timeo, giveup;
b1f69b75
AA		 6260
6261 dprintk("--> %s\n", __func__);
6262
6ba7db34 6263 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6264 goto out;
b1f69b75
AA		 6265
6266 switch (task->tk_status) {
6267 case 0:
ee314c2a 6268 goto out;
b1f69b75
AA		 6269 case -NFS4ERR_LAYOUTTRYLATER:
6270 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6271 timeo = rpc_get_timeout(task->tk_client);
6272 giveup = lgp->args.timestamp + timeo;
6273 if (time_after(giveup, jiffies))
6274 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6275 break;
6276 case -NFS4ERR_EXPIRED:
6277 case -NFS4ERR_BAD_STATEID:
6278 spin_lock(&inode->i_lock);
6279 lo = NFS_I(inode)->layout;
6280 if (!lo || list_empty(&lo->plh_segs)) {
6281 spin_unlock(&inode->i_lock);
6282 /* If the open stateid was bad, then recover it. */
6283 state = lgp->args.ctx->state;
6284 } else {
6285 LIST_HEAD(head);
6286
6287 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6288 spin_unlock(&inode->i_lock);
6289 /* Mark the bad layout state as invalid, then
6290 * retry using the open stateid. */
6291 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6292 }
6293 }
ee314c2a
TM		 6294 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6295 rpc_restart_call_prepare(task);
6296out:
b1f69b75
AA		 6297 dprintk("<-- %s\n", __func__);
6298}
6299
8554116e
IK		 6300static size_t max_response_pages(struct nfs_server *server)
6301{
6302 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6303 return nfs_page_array_len(0, max_resp_sz);
6304}
6305
6306static void nfs4_free_pages(struct page **pages, size_t size)
6307{
6308 int i;
6309
6310 if (!pages)
6311 return;
6312
6313 for (i = 0; i < size; i++) {
6314 if (!pages[i])
6315 break;
6316 __free_page(pages[i]);
6317 }
6318 kfree(pages);
6319}
6320
6321static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6322{
6323 struct page **pages;
6324 int i;
6325
6326 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6327 if (!pages) {
6328 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6329 return NULL;
6330 }
6331
6332 for (i = 0; i < size; i++) {
6333 pages[i] = alloc_page(gfp_flags);
6334 if (!pages[i]) {
6335 dprintk("%s: failed to allocate page\n", __func__);
6336 nfs4_free_pages(pages, size);
6337 return NULL;
6338 }
6339 }
6340
6341 return pages;
6342}
6343
b1f69b75
AA		 6344static void nfs4_layoutget_release(void *calldata)
6345{
6346 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6347 struct inode *inode = lgp->args.inode;
6348 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6349 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6350
6351 dprintk("--> %s\n", __func__);
8554116e 6352 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6353 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6354 put_nfs_open_context(lgp->args.ctx);
6355 kfree(calldata);
6356 dprintk("<-- %s\n", __func__);
6357}
6358
6359static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6360 .rpc_call_prepare = nfs4_layoutget_prepare,
6361 .rpc_call_done = nfs4_layoutget_done,
6362 .rpc_release = nfs4_layoutget_release,
6363};
6364
a0b0a6e3
TM		 6365struct pnfs_layout_segment *
6366nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6367{
a47970ff
WAA		 6368 struct inode *inode = lgp->args.inode;
6369 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6370 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6371 struct rpc_task *task;
6372 struct rpc_message msg = {
6373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6374 .rpc_argp = &lgp->args,
6375 .rpc_resp = &lgp->res,
6ab59344 6376 .rpc_cred = lgp->cred,
b1f69b75
AA		 6377 };
6378 struct rpc_task_setup task_setup_data = {
6379 .rpc_client = server->client,
6380 .rpc_message = &msg,
6381 .callback_ops = &nfs4_layoutget_call_ops,
6382 .callback_data = lgp,
6383 .flags = RPC_TASK_ASYNC,
6384 };
a0b0a6e3 6385 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6386 int status = 0;
6387
6388 dprintk("--> %s\n", __func__);
6389
8554116e
IK		 6390 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6391 if (!lgp->args.layout.pages) {
6392 nfs4_layoutget_release(lgp);
a0b0a6e3 6393 return ERR_PTR(-ENOMEM);
8554116e
IK		 6394 }
6395 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6396 lgp->args.timestamp = jiffies;
8554116e 6397
35124a09 6398 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6399 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6400 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6401
6402 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6403 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6404
b1f69b75
AA		 6405 task = rpc_run_task(&task_setup_data);
6406 if (IS_ERR(task))
a0b0a6e3 6407 return ERR_CAST(task);
b1f69b75 6408 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6409 if (status == 0)
6410 status = task->tk_status;
085b7a45
WAA		 6411 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6412 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6413 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6414 rpc_put_task(task);
6415 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6416 if (status)
6417 return ERR_PTR(status);
6418 return lseg;
b1f69b75
AA		 6419}
6420
cbe82603
BH		 6421static void
6422nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6423{
6424 struct nfs4_layoutreturn *lrp = calldata;
6425
6426 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6427 nfs41_setup_sequence(lrp->clp->cl_session,
6428 &lrp->args.seq_args,
6429 &lrp->res.seq_res,
6430 task);
cbe82603
BH		 6431}
6432
6433static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6434{
6435 struct nfs4_layoutreturn *lrp = calldata;
6436 struct nfs_server *server;
6437
6438 dprintk("--> %s\n", __func__);
6439
6ba7db34 6440 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6441 return;
6442
6443 server = NFS_SERVER(lrp->args.inode);
6444 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6445 rpc_restart_call_prepare(task);
cbe82603
BH		 6446 return;
6447 }
cbe82603
BH		 6448 dprintk("<-- %s\n", __func__);
6449}
6450
6451static void nfs4_layoutreturn_release(void *calldata)
6452{
6453 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6454 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6455
6456 dprintk("--> %s\n", __func__);
849b286f
TM		 6457 spin_lock(&lo->plh_inode->i_lock);
6458 if (lrp->res.lrs_present)
6459 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6460 lo->plh_block_lgets--;
6461 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6462 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6463 kfree(calldata);
6464 dprintk("<-- %s\n", __func__);
6465}
6466
6467static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6468 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6469 .rpc_call_done = nfs4_layoutreturn_done,
6470 .rpc_release = nfs4_layoutreturn_release,
6471};
6472
6473int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6474{
6475 struct rpc_task *task;
6476 struct rpc_message msg = {
6477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6478 .rpc_argp = &lrp->args,
6479 .rpc_resp = &lrp->res,
9556000d 6480 .rpc_cred = lrp->cred,
cbe82603
BH		 6481 };
6482 struct rpc_task_setup task_setup_data = {
6483 .rpc_client = lrp->clp->cl_rpcclient,
6484 .rpc_message = &msg,
6485 .callback_ops = &nfs4_layoutreturn_call_ops,
6486 .callback_data = lrp,
6487 };
6488 int status;
6489
6490 dprintk("--> %s\n", __func__);
9d12b216 6491 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6492 task = rpc_run_task(&task_setup_data);
6493 if (IS_ERR(task))
6494 return PTR_ERR(task);
6495 status = task->tk_status;
6496 dprintk("<-- %s status=%d\n", __func__, status);
6497 rpc_put_task(task);
6498 return status;
6499}
6500
7f11d8d3
AA		 6501/*
6502 * Retrieve the list of Data Server devices from the MDS.
6503 */
6504static int _nfs4_getdevicelist(struct nfs_server *server,
6505 const struct nfs_fh *fh,
6506 struct pnfs_devicelist *devlist)
6507{
6508 struct nfs4_getdevicelist_args args = {
6509 .fh = fh,
6510 .layoutclass = server->pnfs_curr_ld->id,
6511 };
6512 struct nfs4_getdevicelist_res res = {
6513 .devlist = devlist,
6514 };
6515 struct rpc_message msg = {
6516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6517 .rpc_argp = &args,
6518 .rpc_resp = &res,
6519 };
6520 int status;
6521
6522 dprintk("--> %s\n", __func__);
6523 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6524 &res.seq_res, 0);
6525 dprintk("<-- %s status=%d\n", __func__, status);
6526 return status;
6527}
6528
6529int nfs4_proc_getdevicelist(struct nfs_server *server,
6530 const struct nfs_fh *fh,
6531 struct pnfs_devicelist *devlist)
6532{
6533 struct nfs4_exception exception = { };
6534 int err;
6535
6536 do {
6537 err = nfs4_handle_exception(server,
6538 _nfs4_getdevicelist(server, fh, devlist),
6539 &exception);
6540 } while (exception.retry);
6541
6542 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6543 err, devlist->num_devs);
6544
6545 return err;
6546}
6547EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6548
b1f69b75
AA		 6549static int
6550_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6551{
6552 struct nfs4_getdeviceinfo_args args = {
6553 .pdev = pdev,
6554 };
6555 struct nfs4_getdeviceinfo_res res = {
6556 .pdev = pdev,
6557 };
6558 struct rpc_message msg = {
6559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6560 .rpc_argp = &args,
6561 .rpc_resp = &res,
6562 };
6563 int status;
6564
6565 dprintk("--> %s\n", __func__);
7c513058 6566 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6567 dprintk("<-- %s status=%d\n", __func__, status);
6568
6569 return status;
6570}
6571
6572int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6573{
6574 struct nfs4_exception exception = { };
6575 int err;
6576
6577 do {
6578 err = nfs4_handle_exception(server,
6579 _nfs4_proc_getdeviceinfo(server, pdev),
6580 &exception);
6581 } while (exception.retry);
6582 return err;
6583}
6584EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6585
863a3c6c
AA		 6586static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6587{
6588 struct nfs4_layoutcommit_data *data = calldata;
6589 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6590 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6591
d9afbd1b
TM		 6592 nfs41_setup_sequence(session,
6593 &data->args.seq_args,
6594 &data->res.seq_res,
6595 task);
863a3c6c
AA		 6596}
6597
6598static void
6599nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6600{
6601 struct nfs4_layoutcommit_data *data = calldata;
6602 struct nfs_server *server = NFS_SERVER(data->args.inode);
6603
6ba7db34 6604 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6605 return;
6606
6607 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6608 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6609 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6610 case -NFS4ERR_BADLAYOUT: /* no layout */
6611 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6612 task->tk_status = 0;
e59d27e0
TM		 6613 break;
6614 case 0:
863a3c6c
AA		 6615 nfs_post_op_update_inode_force_wcc(data->args.inode,
6616 data->res.fattr);
e59d27e0
TM		 6617 break;
6618 default:
6619 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6620 rpc_restart_call_prepare(task);
6621 return;
6622 }
6623 }
863a3c6c
AA		 6624}
6625
6626static void nfs4_layoutcommit_release(void *calldata)
6627{
6628 struct nfs4_layoutcommit_data *data = calldata;
6629
db29c089 6630 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6631 put_rpccred(data->cred);
6632 kfree(data);
6633}
6634
6635static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6636 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6637 .rpc_call_done = nfs4_layoutcommit_done,
6638 .rpc_release = nfs4_layoutcommit_release,
6639};
6640
6641int
ef311537 6642nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6643{
6644 struct rpc_message msg = {
6645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6646 .rpc_argp = &data->args,
6647 .rpc_resp = &data->res,
6648 .rpc_cred = data->cred,
6649 };
6650 struct rpc_task_setup task_setup_data = {
6651 .task = &data->task,
6652 .rpc_client = NFS_CLIENT(data->args.inode),
6653 .rpc_message = &msg,
6654 .callback_ops = &nfs4_layoutcommit_ops,
6655 .callback_data = data,
6656 .flags = RPC_TASK_ASYNC,
6657 };
6658 struct rpc_task *task;
6659 int status = 0;
6660
6661 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6662 "lbw: %llu inode %lu\n",
6663 data->task.tk_pid, sync,
6664 data->args.lastbytewritten,
6665 data->args.inode->i_ino);
6666
9d12b216 6667 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6668 task = rpc_run_task(&task_setup_data);
6669 if (IS_ERR(task))
6670 return PTR_ERR(task);
ef311537 6671 if (sync == false)
863a3c6c
AA		 6672 goto out;
6673 status = nfs4_wait_for_completion_rpc_task(task);
6674 if (status != 0)
6675 goto out;
6676 status = task->tk_status;
6677out:
6678 dprintk("%s: status %d\n", __func__, status);
6679 rpc_put_task(task);
6680 return status;
6681}
fca78d6d
BS		 6682
6683static int
6684_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6685 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6686{
6687 struct nfs41_secinfo_no_name_args args = {
6688 .style = SECINFO_STYLE_CURRENT_FH,
6689 };
6690 struct nfs4_secinfo_res res = {
6691 .flavors = flavors,
6692 };
6693 struct rpc_message msg = {
6694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6695 .rpc_argp = &args,
6696 .rpc_resp = &res,
6697 };
6698 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6699}
6700
6701static int
6702nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6703 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6704{
6705 struct nfs4_exception exception = { };
6706 int err;
6707 do {
6708 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6709 switch (err) {
6710 case 0:
6711 case -NFS4ERR_WRONGSEC:
6712 case -NFS4ERR_NOTSUPP:
05e9cfb4 6713 goto out;
fca78d6d
BS		 6714 default:
6715 err = nfs4_handle_exception(server, err, &exception);
6716 }
6717 } while (exception.retry);
05e9cfb4 6718out:
fca78d6d
BS		 6719 return err;
6720}
6721
6722static int
6723nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6724 struct nfs_fsinfo *info)
6725{
6726 int err;
6727 struct page *page;
6728 rpc_authflavor_t flavor;
6729 struct nfs4_secinfo_flavors *flavors;
6730
6731 page = alloc_page(GFP_KERNEL);
6732 if (!page) {
6733 err = -ENOMEM;
6734 goto out;
6735 }
6736
6737 flavors = page_address(page);
6738 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6739
6740 /*
6741 * Fall back on "guess and check" method if
6742 * the server doesn't support SECINFO_NO_NAME
6743 */
6744 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6745 err = nfs4_find_root_sec(server, fhandle, info);
6746 goto out_freepage;
6747 }
6748 if (err)
6749 goto out_freepage;
6750
6751 flavor = nfs_find_best_sec(flavors);
6752 if (err == 0)
6753 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6754
6755out_freepage:
6756 put_page(page);
6757 if (err == -EACCES)
6758 return -EPERM;
6759out:
6760 return err;
6761}
1cab0652 6762
ab7cb0df
TM		 6763static int _nfs41_test_stateid(struct nfs_server *server,
6764 nfs4_stateid *stateid,
6765 struct rpc_cred *cred)
7d974794
BS		 6766{
6767 int status;
6768 struct nfs41_test_stateid_args args = {
1cab0652 6769 .stateid = stateid,
7d974794
BS		 6770 };
6771 struct nfs41_test_stateid_res res;
6772 struct rpc_message msg = {
6773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6774 .rpc_argp = &args,
6775 .rpc_resp = &res,
ab7cb0df 6776 .rpc_cred = cred,
7d974794 6777 };
1cab0652 6778
38527b15 6779 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6780 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6781 nfs4_set_sequence_privileged(&args.seq_args);
6782 status = nfs4_call_sync_sequence(server->client, server, &msg,
6783 &args.seq_args, &res.seq_res);
38527b15
CL		 6784 if (status != NFS_OK) {
6785 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6786 return status;
38527b15
CL		 6787 }
6788 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6789 return -res.status;
7d974794
BS		 6790}
6791
38527b15
CL		 6792/**
6793 * nfs41_test_stateid - perform a TEST_STATEID operation
6794 *
6795 * @server: server / transport on which to perform the operation
6796 * @stateid: state ID to test
ab7cb0df 6797 * @cred: credential
38527b15
CL		 6798 *
6799 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6800 * Otherwise a negative NFS4ERR value is returned if the operation
6801 * failed or the state ID is not currently valid.
6802 */
ab7cb0df
TM		 6803static int nfs41_test_stateid(struct nfs_server *server,
6804 nfs4_stateid *stateid,
6805 struct rpc_cred *cred)
7d974794
BS		 6806{
6807 struct nfs4_exception exception = { };
6808 int err;
6809 do {
ab7cb0df 6810 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 6811 if (err != -NFS4ERR_DELAY)
6812 break;
6813 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6814 } while (exception.retry);
6815 return err;
6816}
9aeda35f 6817
7c1d5fae
TM		 6818struct nfs_free_stateid_data {
6819 struct nfs_server *server;
6820 struct nfs41_free_stateid_args args;
9aeda35f 6821 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6822};
6823
6824static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6825{
6826 struct nfs_free_stateid_data *data = calldata;
6827 nfs41_setup_sequence(nfs4_get_session(data->server),
6828 &data->args.seq_args,
6829 &data->res.seq_res,
6830 task);
6831}
6832
6833static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6834{
6835 struct nfs_free_stateid_data *data = calldata;
6836
6837 nfs41_sequence_done(task, &data->res.seq_res);
6838
6839 switch (task->tk_status) {
6840 case -NFS4ERR_DELAY:
6841 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6842 rpc_restart_call_prepare(task);
6843 }
6844}
6845
6846static void nfs41_free_stateid_release(void *calldata)
6847{
6848 kfree(calldata);
6849}
6850
6851const struct rpc_call_ops nfs41_free_stateid_ops = {
6852 .rpc_call_prepare = nfs41_free_stateid_prepare,
6853 .rpc_call_done = nfs41_free_stateid_done,
6854 .rpc_release = nfs41_free_stateid_release,
6855};
6856
6857static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6858 nfs4_stateid *stateid,
ab7cb0df 6859 struct rpc_cred *cred,
7c1d5fae
TM		 6860 bool privileged)
6861{
9aeda35f
BS		 6862 struct rpc_message msg = {
6863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 6864 .rpc_cred = cred,
9aeda35f 6865 };
7c1d5fae
TM		 6866 struct rpc_task_setup task_setup = {
6867 .rpc_client = server->client,
6868 .rpc_message = &msg,
6869 .callback_ops = &nfs41_free_stateid_ops,
6870 .flags = RPC_TASK_ASYNC,
6871 };
6872 struct nfs_free_stateid_data *data;
9aeda35f 6873
38527b15 6874 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6875 data = kmalloc(sizeof(*data), GFP_NOFS);
6876 if (!data)
6877 return ERR_PTR(-ENOMEM);
6878 data->server = server;
6879 nfs4_stateid_copy(&data->args.stateid, stateid);
6880
6881 task_setup.callback_data = data;
6882
6883 msg.rpc_argp = &data->args;
6884 msg.rpc_resp = &data->res;
6885 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6886 if (privileged)
6887 nfs4_set_sequence_privileged(&data->args.seq_args);
6888
6889 return rpc_run_task(&task_setup);
9aeda35f
BS		 6890}
6891
38527b15
CL		 6892/**
6893 * nfs41_free_stateid - perform a FREE_STATEID operation
6894 *
6895 * @server: server / transport on which to perform the operation
6896 * @stateid: state ID to release
ab7cb0df 6897 * @cred: credential
38527b15
CL		 6898 *
6899 * Returns NFS_OK if the server freed "stateid". Otherwise a
6900 * negative NFS4ERR value is returned.
6901 */
ab7cb0df
TM		 6902static int nfs41_free_stateid(struct nfs_server *server,
6903 nfs4_stateid *stateid,
6904 struct rpc_cred *cred)
9aeda35f 6905{
7c1d5fae
TM		 6906 struct rpc_task *task;
6907 int ret;
6908
ab7cb0df 6909 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 6910 if (IS_ERR(task))
6911 return PTR_ERR(task);
6912 ret = rpc_wait_for_completion_task(task);
6913 if (!ret)
6914 ret = task->tk_status;
6915 rpc_put_task(task);
6916 return ret;
9aeda35f 6917}
36281caa 6918
c8b2d0bf
TM		 6919static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6920{
6921 struct rpc_task *task;
ab7cb0df 6922 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 6923
ab7cb0df 6924 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 6925 nfs4_free_lock_state(server, lsp);
6926 if (IS_ERR(task))
6927 return PTR_ERR(task);
6928 rpc_put_task(task);
6929 return 0;
6930}
6931
36281caa
TM		 6932static bool nfs41_match_stateid(const nfs4_stateid *s1,
6933 const nfs4_stateid *s2)
6934{
2d2f24ad 6935 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6936 return false;
6937
2d2f24ad 6938 if (s1->seqid == s2->seqid)
36281caa 6939 return true;
2d2f24ad 6940 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6941 return true;
6942
6943 return false;
6944}
6945
557134a3
AA		 6946#endif /* CONFIG_NFS_V4_1 */
6947
36281caa
TM		 6948static bool nfs4_match_stateid(const nfs4_stateid *s1,
6949 const nfs4_stateid *s2)
6950{
f597c537 6951 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6952}
6953
6954
17280175 6955static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6956 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6957 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6958 .recover_open = nfs4_open_reclaim,
6959 .recover_lock = nfs4_lock_reclaim,
591d71cb 6960 .establish_clid = nfs4_init_clientid,
90a16617 6961 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6962 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6963};
6964
591d71cb 6965#if defined(CONFIG_NFS_V4_1)
17280175 6966static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6967 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6968 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6969 .recover_open = nfs4_open_reclaim,
6970 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6971 .establish_clid = nfs41_init_clientid,
b4b82607 6972 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6973 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6974 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6975};
6976#endif /* CONFIG_NFS_V4_1 */
6977
17280175 6978static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6979 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6980 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6981 .recover_open = nfs4_open_expired,
6982 .recover_lock = nfs4_lock_expired,
6983 .establish_clid = nfs4_init_clientid,
90a16617 6984 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6985};
6986
6987#if defined(CONFIG_NFS_V4_1)
17280175 6988static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6989 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6990 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6991 .recover_open = nfs41_open_expired,
6992 .recover_lock = nfs41_lock_expired,
4d643d1d 6993 .establish_clid = nfs41_init_clientid,
b4b82607 6994 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6995};
591d71cb 6996#endif /* CONFIG_NFS_V4_1 */
1da177e4 6997
17280175 6998static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6999 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7000 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7001 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7002};
7003
7004#if defined(CONFIG_NFS_V4_1)
17280175 7005static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7006 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7007 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7008 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7009};
7010#endif
7011
97dc1359
TM		 7012static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7013 .minor_version = 0,
39c6daae
TM		 7014 .init_caps = NFS_CAP_READDIRPLUS
7015 | NFS_CAP_ATOMIC_OPEN
7016 | NFS_CAP_CHANGE_ATTR
7017 | NFS_CAP_POSIX_LOCK,
97dc1359 7018 .call_sync = _nfs4_call_sync,
36281caa 7019 .match_stateid = nfs4_match_stateid,
fca78d6d 7020 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7021 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7022 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7023 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7024 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7025};
7026
7027#if defined(CONFIG_NFS_V4_1)
7028static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7029 .minor_version = 1,
39c6daae
TM		 7030 .init_caps = NFS_CAP_READDIRPLUS
7031 | NFS_CAP_ATOMIC_OPEN
7032 | NFS_CAP_CHANGE_ATTR
3b66486c 7033 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7034 | NFS_CAP_STATEID_NFSV41
7035 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7036 .call_sync = nfs4_call_sync_sequence,
36281caa 7037 .match_stateid = nfs41_match_stateid,
fca78d6d 7038 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7039 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7040 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7041 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7042 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7043};
7044#endif
7045
97dc1359
TM		 7046const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7047 [0] = &nfs_v4_0_minor_ops,
7048#if defined(CONFIG_NFS_V4_1)
7049 [1] = &nfs_v4_1_minor_ops,
7050#endif
7051};
7052
73a79706
BS		 7053const struct inode_operations nfs4_dir_inode_operations = {
7054 .create = nfs_create,
7055 .lookup = nfs_lookup,
7056 .atomic_open = nfs_atomic_open,
7057 .link = nfs_link,
7058 .unlink = nfs_unlink,
7059 .symlink = nfs_symlink,
7060 .mkdir = nfs_mkdir,
7061 .rmdir = nfs_rmdir,
7062 .mknod = nfs_mknod,
7063 .rename = nfs_rename,
7064 .permission = nfs_permission,
7065 .getattr = nfs_getattr,
7066 .setattr = nfs_setattr,
7067 .getxattr = generic_getxattr,
7068 .setxattr = generic_setxattr,
7069 .listxattr = generic_listxattr,
7070 .removexattr = generic_removexattr,
7071};
7072
92e1d5be 7073static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7074 .permission = nfs_permission,
7075 .getattr = nfs_getattr,
7076 .setattr = nfs_setattr,
64c2ce8b
AK		 7077 .getxattr = generic_getxattr,
7078 .setxattr = generic_setxattr,
7079 .listxattr = generic_listxattr,
7080 .removexattr = generic_removexattr,
6b3b5496
BF		 7081};
7082
509de811 7083const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7084 .version = 4, /* protocol version */
7085 .dentry_ops = &nfs4_dentry_operations,
7086 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7087 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7088 .file_ops = &nfs4_file_operations,
1da177e4 7089 .getroot = nfs4_proc_get_root,
281cad46 7090 .submount = nfs4_submount,
ff9099f2 7091 .try_mount = nfs4_try_mount,
1da177e4
LT		 7092 .getattr = nfs4_proc_getattr,
7093 .setattr = nfs4_proc_setattr,
7094 .lookup = nfs4_proc_lookup,
7095 .access = nfs4_proc_access,
7096 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7097 .create = nfs4_proc_create,
7098 .remove = nfs4_proc_remove,
7099 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7100 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7101 .unlink_done = nfs4_proc_unlink_done,
7102 .rename = nfs4_proc_rename,
d3d4152a 7103 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7104 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7105 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7106 .link = nfs4_proc_link,
7107 .symlink = nfs4_proc_symlink,
7108 .mkdir = nfs4_proc_mkdir,
7109 .rmdir = nfs4_proc_remove,
7110 .readdir = nfs4_proc_readdir,
7111 .mknod = nfs4_proc_mknod,
7112 .statfs = nfs4_proc_statfs,
7113 .fsinfo = nfs4_proc_fsinfo,
7114 .pathconf = nfs4_proc_pathconf,
e9326dca 7115 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7116 .decode_dirent = nfs4_decode_dirent,
7117 .read_setup = nfs4_proc_read_setup,
1abb5088 7118 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7119 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7120 .read_done = nfs4_read_done,
1da177e4 7121 .write_setup = nfs4_proc_write_setup,
57208fa7 7122 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7123 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7124 .write_done = nfs4_write_done,
1da177e4 7125 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7126 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7127 .commit_done = nfs4_commit_done,
1da177e4 7128 .lock = nfs4_proc_lock,
e50a1c2e 7129 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7130 .close_context = nfs4_close_context,
2b484297 7131 .open_context = nfs4_atomic_open,
011e2a7f 7132 .have_delegation = nfs4_have_delegation,
57ec14c5 7133 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7134 .alloc_client = nfs4_alloc_client,
45a52a02 7135 .init_client = nfs4_init_client,
cdb7eced 7136 .free_client = nfs4_free_client,
1179acc6
BS		 7137 .create_server = nfs4_create_server,
7138 .clone_server = nfs_clone_server,
1da177e4
LT		 7139};
7140
64c2ce8b
AK		 7141static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7142 .prefix = XATTR_NAME_NFSV4_ACL,
7143 .list = nfs4_xattr_list_nfs4_acl,
7144 .get = nfs4_xattr_get_nfs4_acl,
7145 .set = nfs4_xattr_set_nfs4_acl,
7146};
7147
7148const struct xattr_handler *nfs4_xattr_handlers[] = {
7149 &nfs4_xattr_nfs4_acl_handler,
7150 NULL
7151};
7152
1da177e4
LT		 7153/*
7154 * Local variables:
7155 * c-basic-offset: 8
7156 * End:
7157 */
Linux 6.x block layer and io_uring tree(s)