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NFSv4: Cleanup: pass the nfs_open_context to nfs4_do_open
[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 1998static int _nfs4_do_open(struct inode *dir,
4197a055 1999 struct nfs_open_context *ctx,
82be417a
AA		 2000 int flags,
2001 struct iattr *sattr,
4197a055 2002 struct nfs4_state **res)
1da177e4
LT		 2003{
2004 struct nfs4_state_owner *sp;
2005 struct nfs4_state *state = NULL;
2006 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2007 struct nfs4_opendata *opendata;
4197a055
TM		 2008 struct dentry *dentry = ctx->dentry;
2009 struct rpc_cred *cred = ctx->cred;
2010 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2011 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2012 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 2013 int status;
1da177e4
LT		 2014
2015 /* Protect against reboot recovery conflicts */
1da177e4 2016 status = -ENOMEM;
d1e284d5
TM		 2017 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2018 if (sp == NULL) {
1da177e4
LT		 2019 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2020 goto out_err;
2021 }
58d9714a
TM		 2022 status = nfs4_recover_expired_lease(server);
2023 if (status != 0)
b4454fe1 2024 goto err_put_state_owner;
82a2c1b7
AV		 2025 if (dentry->d_inode != NULL)
2026 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2027 status = -ENOMEM;
49f9a0fa
TM		 2028 if (dentry->d_inode)
2029 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2030 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2031 claim, GFP_KERNEL);
e56e0b78 2032 if (opendata == NULL)
95d35cb4 2033 goto err_put_state_owner;
1da177e4 2034
82be417a
AA		 2035 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2036 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2037 if (!opendata->f_attr.mdsthreshold)
2038 goto err_opendata_put;
1549210f 2039 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2040 }
82a2c1b7
AV		 2041 if (dentry->d_inode != NULL)
2042 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2043
c21443c2 2044 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2045 if (status != 0)
2046 goto err_opendata_put;
2047
549b19cc
TM		 2048 if ((opendata->o_arg.open_flags & O_EXCL) &&
2049 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2050 nfs4_exclusive_attrset(opendata, sattr);
2051
2052 nfs_fattr_init(opendata->o_res.f_attr);
2053 status = nfs4_do_setattr(state->inode, cred,
2054 opendata->o_res.f_attr, sattr,
2055 state);
2056 if (status == 0)
2057 nfs_setattr_update_inode(state->inode, sattr);
2058 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2059 }
82be417a
AA		 2060
2061 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2062 *ctx_th = opendata->f_attr.mdsthreshold;
2063 else
2064 kfree(opendata->f_attr.mdsthreshold);
2065 opendata->f_attr.mdsthreshold = NULL;
2066
c6d00e63 2067 nfs4_opendata_put(opendata);
1da177e4 2068 nfs4_put_state_owner(sp);
1da177e4
LT		 2069 *res = state;
2070 return 0;
c6d00e63 2071err_opendata_put:
82be417a 2072 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2073 nfs4_opendata_put(opendata);
e56e0b78
TM		 2074err_put_state_owner:
2075 nfs4_put_state_owner(sp);
1da177e4 2076out_err:
1da177e4
LT		 2077 *res = NULL;
2078 return status;
2079}
2080
2081
82be417a 2082static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2083 struct nfs_open_context *ctx,
82be417a 2084 int flags,
4197a055 2085 struct iattr *sattr)
1da177e4 2086{
49f9a0fa 2087 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2088 struct nfs4_exception exception = { };
2089 struct nfs4_state *res;
2090 int status;
2091
2092 do {
4197a055 2093 status = _nfs4_do_open(dir, ctx, flags, sattr, &res);
1da177e4
LT		 2094 if (status == 0)
2095 break;
2096 /* NOTE: BAD_SEQID means the server and client disagree about the
2097 * book-keeping w.r.t. state-changing operations
2098 * (OPEN/CLOSE/LOCK/LOCKU...)
2099 * It is actually a sign of a bug on the client or on the server.
2100 *
2101 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2102 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2103 * have unhashed the old state_owner for us, and that we can
2104 * therefore safely retry using a new one. We should still warn
2105 * the user though...
2106 */
2107 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2108 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2109 " returned a bad sequence-id error!\n",
2110 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2111 exception.retry = 1;
2112 continue;
2113 }
550f5747
TM		 2114 /*
2115 * BAD_STATEID on OPEN means that the server cancelled our
2116 * state before it received the OPEN_CONFIRM.
2117 * Recover by retrying the request as per the discussion
2118 * on Page 181 of RFC3530.
2119 */
2120 if (status == -NFS4ERR_BAD_STATEID) {
2121 exception.retry = 1;
2122 continue;
2123 }
aac00a8d
TM		 2124 if (status == -EAGAIN) {
2125 /* We must have found a delegation */
2126 exception.retry = 1;
2127 continue;
2128 }
49f9a0fa
TM		 2129 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2130 continue;
2131 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2132 status, &exception));
2133 } while (exception.retry);
2134 return res;
2135}
2136
659bfcd6
TM		 2137static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2138 struct nfs_fattr *fattr, struct iattr *sattr,
2139 struct nfs4_state *state)
1da177e4 2140{
3e4f6290 2141 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2142 struct nfs_setattrargs arg = {
3e4f6290 2143 .fh = NFS_FH(inode),
1da177e4
LT		 2144 .iap = sattr,
2145 .server = server,
2146 .bitmask = server->attr_bitmask,
2147 };
2148 struct nfs_setattrres res = {
2149 .fattr = fattr,
2150 .server = server,
2151 };
2152 struct rpc_message msg = {
659bfcd6
TM		 2153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2154 .rpc_argp = &arg,
2155 .rpc_resp = &res,
2156 .rpc_cred = cred,
1da177e4 2157 };
26e976a8 2158 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2159 fmode_t fmode;
2160 bool truncate;
65e4308d 2161 int status;
1da177e4 2162
0e574af1 2163 nfs_fattr_init(fattr);
1da177e4 2164
ee3ae84e
TM		 2165 /* Servers should only apply open mode checks for file size changes */
2166 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2167 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2168
2169 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2170 /* Use that stateid */
2171 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2172 struct nfs_lockowner lockowner = {
2173 .l_owner = current->files,
2174 .l_pid = current->tgid,
2175 };
4fc8796d 2176 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2177 &lockowner);
08e9eac4 2178 } else
f597c537 2179 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2180
7c513058 2181 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2182 if (status == 0 && state != NULL)
2183 renew_lease(server, timestamp);
65e4308d 2184 return status;
1da177e4
LT		 2185}
2186
659bfcd6
TM		 2187static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2188 struct nfs_fattr *fattr, struct iattr *sattr,
2189 struct nfs4_state *state)
1da177e4 2190{
3e4f6290 2191 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2192 struct nfs4_exception exception = {
2193 .state = state,
3114ea7a 2194 .inode = inode,
a1d0b5ee 2195 };
1da177e4
LT		 2196 int err;
2197 do {
451146be
TM		 2198 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2199 switch (err) {
2200 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2201 if (!(sattr->ia_valid & ATTR_SIZE)) {
2202 pr_warn_once("NFSv4: server %s is incorrectly "
2203 "applying open mode checks to "
2204 "a SETATTR that is not "
2205 "changing file size.\n",
2206 server->nfs_client->cl_hostname);
2207 }
451146be
TM		 2208 if (state && !(state->state & FMODE_WRITE)) {
2209 err = -EBADF;
2210 if (sattr->ia_valid & ATTR_OPEN)
2211 err = -EACCES;
2212 goto out;
2213 }
2214 }
2215 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2216 } while (exception.retry);
451146be 2217out:
1da177e4
LT		 2218 return err;
2219}
2220
2221struct nfs4_closedata {
2222 struct inode *inode;
2223 struct nfs4_state *state;
2224 struct nfs_closeargs arg;
2225 struct nfs_closeres res;
516a6af6 2226 struct nfs_fattr fattr;
26e976a8 2227 unsigned long timestamp;
f7e8917a
FI		 2228 bool roc;
2229 u32 roc_barrier;
1da177e4
LT		 2230};
2231
963d8fe5 2232static void nfs4_free_closedata(void *data)
9512135d 2233{
963d8fe5
TM		 2234 struct nfs4_closedata *calldata = data;
2235 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2236 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2237
f7e8917a
FI		 2238 if (calldata->roc)
2239 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2240 nfs4_put_open_state(calldata->state);
2241 nfs_free_seqid(calldata->arg.seqid);
9512135d 2242 nfs4_put_state_owner(sp);
322b2b90 2243 nfs_sb_deactive(sb);
9512135d
TM		 2244 kfree(calldata);
2245}
2246
88069f77
TM		 2247static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2248 fmode_t fmode)
2249{
2250 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2251 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2252 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2253 case FMODE_WRITE:
88069f77 2254 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2255 break;
2256 case FMODE_READ:
88069f77 2257 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2258 break;
2259 case 0:
2260 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2261 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2262 clear_bit(NFS_OPEN_STATE, &state->flags);
2263 }
88069f77
TM		 2264 spin_unlock(&state->owner->so_lock);
2265}
2266
963d8fe5 2267static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2268{
963d8fe5 2269 struct nfs4_closedata *calldata = data;
1da177e4 2270 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2271 struct nfs_server *server = NFS_SERVER(calldata->inode);
2272
a3ca5651 2273 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2274 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2275 return;
1da177e4
LT		 2276 /* hmm. we are done with the inode, and in the process of freeing
2277 * the state_owner. we keep this around to process errors
2278 */
1da177e4
LT		 2279 switch (task->tk_status) {
2280 case 0:
f7e8917a
FI		 2281 if (calldata->roc)
2282 pnfs_roc_set_barrier(state->inode,
2283 calldata->roc_barrier);
45328c35 2284 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2285 renew_lease(server, calldata->timestamp);
88069f77
TM		 2286 nfs4_close_clear_stateid_flags(state,
2287 calldata->arg.fmode);
1da177e4
LT		 2288 break;
2289 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2290 case -NFS4ERR_OLD_STATEID:
2291 case -NFS4ERR_BAD_STATEID:
1da177e4 2292 case -NFS4ERR_EXPIRED:
dc0b027d 2293 if (calldata->arg.fmode == 0)
9e33bed5 2294 break;
1da177e4 2295 default:
72211dbe
TM		 2296 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2297 rpc_restart_call_prepare(task);
1da177e4 2298 }
72211dbe 2299 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2300 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2301 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2302}
2303
4ce70ada 2304static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2305{
4ce70ada 2306 struct nfs4_closedata *calldata = data;
9512135d 2307 struct nfs4_state *state = calldata->state;
7fdab069 2308 struct inode *inode = calldata->inode;
88069f77 2309 int call_close = 0;
9512135d 2310
a3ca5651 2311 dprintk("%s: begin!\n", __func__);
963d8fe5 2312 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2313 goto out_wait;
003707c7 2314
88069f77
TM		 2315 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2316 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2317 spin_lock(&state->owner->so_lock);
003707c7 2318 /* Calculate the change in open mode */
e7616923 2319 if (state->n_rdwr == 0) {
003707c7 2320 if (state->n_rdonly == 0) {
88069f77
TM		 2321 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2322 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2323 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2324 }
2325 if (state->n_wronly == 0) {
88069f77
TM		 2326 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2327 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2328 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2329 }
e7616923 2330 }
5d422301
TM		 2331 if (!nfs4_valid_open_stateid(state))
2332 call_close = 0;
4cecb76f 2333 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2334
2335 if (!call_close) {
963d8fe5 2336 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2337 goto out_no_action;
9512135d 2338 }
88069f77 2339
f7e8917a 2340 if (calldata->arg.fmode == 0) {
88069f77 2341 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2342 if (calldata->roc &&
b9536ad5
AA		 2343 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2344 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2345 goto out_wait;
b9536ad5 2346 }
f7e8917a 2347 }
88069f77 2348
516a6af6 2349 nfs_fattr_init(calldata->res.fattr);
26e976a8 2350 calldata->timestamp = jiffies;
7fdab069 2351 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2352 &calldata->arg.seq_args,
2353 &calldata->res.seq_res,
2240a9e2
TM		 2354 task) != 0)
2355 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2356 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2357 return;
2358out_no_action:
2359 task->tk_action = NULL;
2360out_wait:
2361 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2362}
2363
963d8fe5 2364static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2365 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2366 .rpc_call_done = nfs4_close_done,
2367 .rpc_release = nfs4_free_closedata,
2368};
2369
1da177e4
LT		 2370/*
2371 * It is possible for data to be read/written from a mem-mapped file
2372 * after the sys_close call (which hits the vfs layer as a flush).
2373 * This means that we can't safely call nfsv4 close on a file until
2374 * the inode is cleared. This in turn means that we are not good
2375 * NFSv4 citizens - we do not indicate to the server to update the file's
2376 * share state even when we are done with one of the three share
2377 * stateid's in the inode.
2378 *
2379 * NOTE: Caller must be holding the sp->so_owner semaphore!
2380 */
1f7977c1 2381int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2382{
4a35bd41 2383 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2384 struct nfs4_closedata *calldata;
b39e625b
TM		 2385 struct nfs4_state_owner *sp = state->owner;
2386 struct rpc_task *task;
5138fde0
TM		 2387 struct rpc_message msg = {
2388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2389 .rpc_cred = state->owner->so_cred,
2390 };
c970aa85
TM		 2391 struct rpc_task_setup task_setup_data = {
2392 .rpc_client = server->client,
5138fde0 2393 .rpc_message = &msg,
c970aa85 2394 .callback_ops = &nfs4_close_ops,
101070ca 2395 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2396 .flags = RPC_TASK_ASYNC,
2397 };
9512135d 2398 int status = -ENOMEM;
1da177e4 2399
8535b2be 2400 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2401 if (calldata == NULL)
9512135d 2402 goto out;
9d12b216 2403 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2404 calldata->inode = state->inode;
1da177e4 2405 calldata->state = state;
4a35bd41 2406 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2407 calldata->arg.stateid = &state->open_stateid;
1da177e4 2408 /* Serialization for the sequence id */
8535b2be 2409 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2410 if (calldata->arg.seqid == NULL)
2411 goto out_free_calldata;
dc0b027d 2412 calldata->arg.fmode = 0;
a65318bf 2413 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2414 calldata->res.fattr = &calldata->fattr;
c1d51931 2415 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2416 calldata->res.server = server;
1f7977c1 2417 calldata->roc = pnfs_roc(state->inode);
643168c2 2418 nfs_sb_active(calldata->inode->i_sb);
9512135d 2419
1174dd1f
TM		 2420 msg.rpc_argp = &calldata->arg;
2421 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2422 task_setup_data.callback_data = calldata;
2423 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2424 if (IS_ERR(task))
2425 return PTR_ERR(task);
a49c3c77
TM		 2426 status = 0;
2427 if (wait)
2428 status = rpc_wait_for_completion_task(task);
b39e625b 2429 rpc_put_task(task);
a49c3c77 2430 return status;
9512135d
TM		 2431out_free_calldata:
2432 kfree(calldata);
2433out:
b39e625b
TM		 2434 nfs4_put_open_state(state);
2435 nfs4_put_state_owner(sp);
9512135d 2436 return status;
1da177e4
LT		 2437}
2438
2b484297 2439static struct inode *
cd9a1c0e 2440nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2441{
1da177e4 2442 struct nfs4_state *state;
1da177e4 2443
565277f6 2444 /* Protect against concurrent sillydeletes */
4197a055 2445 state = nfs4_do_open(dir, ctx, open_flags, attr);
f46e0bd3
TM		 2446 if (IS_ERR(state))
2447 return ERR_CAST(state);
cd9a1c0e 2448 ctx->state = state;
f46e0bd3 2449 return igrab(state->inode);
1da177e4
LT		 2450}
2451
1185a552 2452static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2453{
2454 if (ctx->state == NULL)
2455 return;
2456 if (is_sync)
643168c2 2457 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2458 else
643168c2 2459 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2460}
1da177e4
LT		 2461
2462static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2463{
43652ad5
BH		 2464 struct nfs4_server_caps_arg args = {
2465 .fhandle = fhandle,
2466 };
1da177e4
LT		 2467 struct nfs4_server_caps_res res = {};
2468 struct rpc_message msg = {
2469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2470 .rpc_argp = &args,
1da177e4
LT		 2471 .rpc_resp = &res,
2472 };
2473 int status;
2474
7c513058 2475 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2476 if (status == 0) {
2477 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2478 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2479 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2480 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2481 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2482 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2483 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2484 server->caps |= NFS_CAP_ACLS;
2485 if (res.has_links != 0)
2486 server->caps |= NFS_CAP_HARDLINKS;
2487 if (res.has_symlinks != 0)
2488 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2489 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2490 server->caps |= NFS_CAP_FILEID;
2491 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2492 server->caps |= NFS_CAP_MODE;
2493 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2494 server->caps |= NFS_CAP_NLINK;
2495 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2496 server->caps |= NFS_CAP_OWNER;
2497 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2498 server->caps |= NFS_CAP_OWNER_GROUP;
2499 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2500 server->caps |= NFS_CAP_ATIME;
2501 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2502 server->caps |= NFS_CAP_CTIME;
2503 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2504 server->caps |= NFS_CAP_MTIME;
2505
a65318bf
TM		 2506 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2507 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2508 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2509 server->acl_bitmask = res.acl_bitmask;
264e6351 2510 server->fh_expire_type = res.fh_expire_type;
1da177e4 2511 }
cccef3b9 2512
1da177e4
LT		 2513 return status;
2514}
2515
55a97593 2516int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2517{
2518 struct nfs4_exception exception = { };
2519 int err;
2520 do {
2521 err = nfs4_handle_exception(server,
2522 _nfs4_server_capabilities(server, fhandle),
2523 &exception);
2524 } while (exception.retry);
2525 return err;
2526}
2527
2528static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2529 struct nfs_fsinfo *info)
2530{
1da177e4
LT		 2531 struct nfs4_lookup_root_arg args = {
2532 .bitmask = nfs4_fattr_bitmap,
2533 };
2534 struct nfs4_lookup_res res = {
2535 .server = server,
0e574af1 2536 .fattr = info->fattr,
1da177e4
LT		 2537 .fh = fhandle,
2538 };
2539 struct rpc_message msg = {
2540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2541 .rpc_argp = &args,
2542 .rpc_resp = &res,
2543 };
008f55d0 2544
0e574af1 2545 nfs_fattr_init(info->fattr);
7c513058 2546 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2547}
2548
2549static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2550 struct nfs_fsinfo *info)
2551{
2552 struct nfs4_exception exception = { };
2553 int err;
2554 do {
fb8a5ba8
BS		 2555 err = _nfs4_lookup_root(server, fhandle, info);
2556 switch (err) {
2557 case 0:
2558 case -NFS4ERR_WRONGSEC:
05e9cfb4 2559 goto out;
fb8a5ba8
BS		 2560 default:
2561 err = nfs4_handle_exception(server, err, &exception);
2562 }
1da177e4 2563 } while (exception.retry);
05e9cfb4 2564out:
1da177e4
LT		 2565 return err;
2566}
2567
8f70e95f
BS		 2568static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2569 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2570{
2571 struct rpc_auth *auth;
2572 int ret;
2573
2574 auth = rpcauth_create(flavor, server->client);
e8d920c5 2575 if (IS_ERR(auth)) {
75bc8821 2576 ret = -EACCES;
8f70e95f
BS		 2577 goto out;
2578 }
2579 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2580out:
2581 return ret;
2582}
2583
9a744ba3
CL		 2584/*
2585 * Retry pseudoroot lookup with various security flavors. We do this when:
2586 *
2587 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2588 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2589 *
2590 * Returns zero on success, or a negative NFS4ERR value, or a
2591 * negative errno value.
2592 */
801a16dc 2593static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2594 struct nfs_fsinfo *info)
1da177e4 2595{
9a744ba3
CL		 2596 /* Per 3530bis 15.33.5 */
2597 static const rpc_authflavor_t flav_array[] = {
2598 RPC_AUTH_GSS_KRB5P,
2599 RPC_AUTH_GSS_KRB5I,
2600 RPC_AUTH_GSS_KRB5,
c4eafe11 2601 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2602 RPC_AUTH_NULL,
2603 };
2604 int status = -EPERM;
2605 size_t i;
6a1a1e34 2606
9a744ba3 2607 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2608 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2609 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2610 continue;
2611 break;
8f70e95f 2612 }
9a744ba3 2613
fb8a5ba8
BS		 2614 /*
2615 * -EACCESS could mean that the user doesn't have correct permissions
2616 * to access the mount. It could also mean that we tried to mount
2617 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2618 * existing mount programs don't handle -EACCES very well so it should
2619 * be mapped to -EPERM instead.
2620 */
2621 if (status == -EACCES)
2622 status = -EPERM;
801a16dc
BS		 2623 return status;
2624}
2625
2ed4b95b
CL		 2626static int nfs4_do_find_root_sec(struct nfs_server *server,
2627 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2628{
2629 int mv = server->nfs_client->cl_minorversion;
2630 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2631}
2632
2633/**
2634 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2635 * @server: initialized nfs_server handle
2636 * @fhandle: we fill in the pseudo-fs root file handle
2637 * @info: we fill in an FSINFO struct
2638 *
2639 * Returns zero on success, or a negative errno.
801a16dc 2640 */
3028eb2b
BS		 2641int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2642 struct nfs_fsinfo *info)
801a16dc 2643{
2ed4b95b
CL		 2644 int status;
2645
2646 status = nfs4_lookup_root(server, fhandle, info);
2647 if ((status == -NFS4ERR_WRONGSEC) &&
2648 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2649 status = nfs4_do_find_root_sec(server, fhandle, info);
2650
1da177e4
LT		 2651 if (status == 0)
2652 status = nfs4_server_capabilities(server, fhandle);
2653 if (status == 0)
2654 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2655
c12e87f4 2656 return nfs4_map_errors(status);
1da177e4
LT		 2657}
2658
bae36241
BS		 2659static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2660 struct nfs_fsinfo *info)
2661{
2662 int error;
2663 struct nfs_fattr *fattr = info->fattr;
2664
2665 error = nfs4_server_capabilities(server, mntfh);
2666 if (error < 0) {
2667 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2668 return error;
2669 }
2670
2671 error = nfs4_proc_getattr(server, mntfh, fattr);
2672 if (error < 0) {
2673 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2674 return error;
2675 }
2676
2677 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2678 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2679 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2680
2681 return error;
2682}
2683
6b97fd3d
MN		 2684/*
2685 * Get locations and (maybe) other attributes of a referral.
2686 * Note that we'll actually follow the referral later when
2687 * we detect fsid mismatch in inode revalidation
2688 */
f05d147f
BS		 2689static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2690 const struct qstr *name, struct nfs_fattr *fattr,
2691 struct nfs_fh *fhandle)
6b97fd3d
MN		 2692{
2693 int status = -ENOMEM;
2694 struct page *page = NULL;
2695 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2696
2697 page = alloc_page(GFP_KERNEL);
2698 if (page == NULL)
2699 goto out;
2700 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2701 if (locations == NULL)
2702 goto out;
2703
f05d147f 2704 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2705 if (status != 0)
2706 goto out;
2707 /* Make sure server returned a different fsid for the referral */
2708 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2709 dprintk("%s: server did not return a different fsid for"
2710 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2711 status = -EIO;
2712 goto out;
2713 }
533eb461
AA		 2714 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2715 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2716
533eb461 2717 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2718 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2719 memset(fhandle, 0, sizeof(struct nfs_fh));
2720out:
2721 if (page)
2722 __free_page(page);
5d7ca35a 2723 kfree(locations);
6b97fd3d
MN		 2724 return status;
2725}
2726
1da177e4
LT		 2727static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2728{
2729 struct nfs4_getattr_arg args = {
2730 .fh = fhandle,
2731 .bitmask = server->attr_bitmask,
2732 };
2733 struct nfs4_getattr_res res = {
2734 .fattr = fattr,
2735 .server = server,
2736 };
2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2739 .rpc_argp = &args,
2740 .rpc_resp = &res,
2741 };
2742
0e574af1 2743 nfs_fattr_init(fattr);
7c513058 2744 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2745}
2746
2747static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2748{
2749 struct nfs4_exception exception = { };
2750 int err;
2751 do {
2752 err = nfs4_handle_exception(server,
2753 _nfs4_proc_getattr(server, fhandle, fattr),
2754 &exception);
2755 } while (exception.retry);
2756 return err;
2757}
2758
2759/*
2760 * The file is not closed if it is opened due to the a request to change
2761 * the size of the file. The open call will not be needed once the
2762 * VFS layer lookup-intents are implemented.
2763 *
2764 * Close is called when the inode is destroyed.
2765 * If we haven't opened the file for O_WRONLY, we
2766 * need to in the size_change case to obtain a stateid.
2767 *
2768 * Got race?
2769 * Because OPEN is always done by name in nfsv4, it is
2770 * possible that we opened a different file by the same
2771 * name. We can recognize this race condition, but we
2772 * can't do anything about it besides returning an error.
2773 *
2774 * This will be fixed with VFS changes (lookup-intent).
2775 */
2776static int
2777nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2778 struct iattr *sattr)
2779{
08e9eac4 2780 struct inode *inode = dentry->d_inode;
659bfcd6 2781 struct rpc_cred *cred = NULL;
d530838b 2782 struct nfs4_state *state = NULL;
1da177e4
LT		 2783 int status;
2784
8a1636c4 2785 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2786 pnfs_commit_and_return_layout(inode);
8a1636c4 2787
0e574af1 2788 nfs_fattr_init(fattr);
1da177e4 2789
2669940d
AA		 2790 /* Deal with open(O_TRUNC) */
2791 if (sattr->ia_valid & ATTR_OPEN)
2792 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2793
2794 /* Optimization: if the end result is no change, don't RPC */
2795 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2796 return 0;
2797
d530838b 2798 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2799 if (sattr->ia_valid & ATTR_FILE) {
2800 struct nfs_open_context *ctx;
2801
2802 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2803 if (ctx) {
2804 cred = ctx->cred;
2805 state = ctx->state;
2806 }
659bfcd6 2807 }
08e9eac4 2808
659bfcd6 2809 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2810 if (status == 0)
2811 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2812 return status;
2813}
2814
0c2e53f1
TM		 2815static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2816 const struct qstr *name, struct nfs_fh *fhandle,
2817 struct nfs_fattr *fattr)
2b3de441 2818{
0c2e53f1 2819 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2820 int status;
2821 struct nfs4_lookup_arg args = {
2822 .bitmask = server->attr_bitmask,
0c2e53f1 2823 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2824 .name = name,
2825 };
2826 struct nfs4_lookup_res res = {
2827 .server = server,
2828 .fattr = fattr,
2829 .fh = fhandle,
2830 };
2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2833 .rpc_argp = &args,
2834 .rpc_resp = &res,
2835 };
2836
2837 nfs_fattr_init(fattr);
2838
1da177e4 2839 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2840 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2841 dprintk("NFS reply lookup: %d\n", status);
2842 return status;
2843}
2844
72de53ec 2845static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2846{
7ebb9315 2847 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2848 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2849 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2850 fattr->nlink = 2;
2851}
2852
72de53ec
BS		 2853static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2854 struct qstr *name, struct nfs_fh *fhandle,
2855 struct nfs_fattr *fattr)
1da177e4
LT		 2856{
2857 struct nfs4_exception exception = { };
72de53ec 2858 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2859 int err;
2860 do {
72de53ec
BS		 2861 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2862 switch (err) {
08ef7bd3 2863 case -NFS4ERR_BADNAME:
72de53ec
BS		 2864 err = -ENOENT;
2865 goto out;
0c2e53f1 2866 case -NFS4ERR_MOVED:
f05d147f 2867 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2868 goto out;
0c2e53f1 2869 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2870 err = -EPERM;
2871 if (client != *clnt)
2872 goto out;
2873
2874 client = nfs4_create_sec_client(client, dir, name);
2875 if (IS_ERR(client))
2876 return PTR_ERR(client);
2877
2878 exception.retry = 1;
2879 break;
2880 default:
2881 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2882 }
1da177e4 2883 } while (exception.retry);
72de53ec
BS		 2884
2885out:
2886 if (err == 0)
2887 *clnt = client;
2888 else if (client != *clnt)
2889 rpc_shutdown_client(client);
2890
1da177e4
LT		 2891 return err;
2892}
2893
80a16b21 2894static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2895 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2896{
2897 int status;
2898 struct rpc_clnt *client = NFS_CLIENT(dir);
2899
2900 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2901 if (client != NFS_CLIENT(dir)) {
2902 rpc_shutdown_client(client);
2903 nfs_fixup_secinfo_attributes(fattr);
2904 }
2905 return status;
2906}
2907
f05d147f
BS		 2908struct rpc_clnt *
2909nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2910 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2911{
2912 int status;
2913 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2914
2915 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2916 if (status < 0) {
2917 rpc_shutdown_client(client);
2918 return ERR_PTR(status);
2919 }
2920 return client;
2921}
2922
1da177e4
LT		 2923static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2924{
76b32999 2925 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2926 struct nfs4_accessargs args = {
2927 .fh = NFS_FH(inode),
a4980e78 2928 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2929 };
2930 struct nfs4_accessres res = {
2931 .server = server,
1da177e4 2932 };
1da177e4
LT		 2933 struct rpc_message msg = {
2934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2935 .rpc_argp = &args,
2936 .rpc_resp = &res,
2937 .rpc_cred = entry->cred,
2938 };
2939 int mode = entry->mask;
2940 int status;
2941
2942 /*
2943 * Determine which access bits we want to ask for...
2944 */
2945 if (mode & MAY_READ)
2946 args.access |= NFS4_ACCESS_READ;
2947 if (S_ISDIR(inode->i_mode)) {
2948 if (mode & MAY_WRITE)
2949 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2950 if (mode & MAY_EXEC)
2951 args.access |= NFS4_ACCESS_LOOKUP;
2952 } else {
2953 if (mode & MAY_WRITE)
2954 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2955 if (mode & MAY_EXEC)
2956 args.access |= NFS4_ACCESS_EXECUTE;
2957 }
c407d41a
TM		 2958
2959 res.fattr = nfs_alloc_fattr();
2960 if (res.fattr == NULL)
2961 return -ENOMEM;
2962
7c513058 2963 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2964 if (!status) {
6168f62c 2965 nfs_access_set_mask(entry, res.access);
c407d41a 2966 nfs_refresh_inode(inode, res.fattr);
1da177e4 2967 }
c407d41a 2968 nfs_free_fattr(res.fattr);
1da177e4
LT		 2969 return status;
2970}
2971
2972static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2973{
2974 struct nfs4_exception exception = { };
2975 int err;
2976 do {
2977 err = nfs4_handle_exception(NFS_SERVER(inode),
2978 _nfs4_proc_access(inode, entry),
2979 &exception);
2980 } while (exception.retry);
2981 return err;
2982}
2983
2984/*
2985 * TODO: For the time being, we don't try to get any attributes
2986 * along with any of the zero-copy operations READ, READDIR,
2987 * READLINK, WRITE.
2988 *
2989 * In the case of the first three, we want to put the GETATTR
2990 * after the read-type operation -- this is because it is hard
2991 * to predict the length of a GETATTR response in v4, and thus
2992 * align the READ data correctly. This means that the GETATTR
2993 * may end up partially falling into the page cache, and we should
2994 * shift it into the 'tail' of the xdr_buf before processing.
2995 * To do this efficiently, we need to know the total length
2996 * of data received, which doesn't seem to be available outside
2997 * of the RPC layer.
2998 *
2999 * In the case of WRITE, we also want to put the GETATTR after
3000 * the operation -- in this case because we want to make sure
140150db 3001 * we get the post-operation mtime and size.
1da177e4
LT		 3002 *
3003 * Both of these changes to the XDR layer would in fact be quite
3004 * minor, but I decided to leave them for a subsequent patch.
3005 */
3006static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3007 unsigned int pgbase, unsigned int pglen)
3008{
3009 struct nfs4_readlink args = {
3010 .fh = NFS_FH(inode),
3011 .pgbase = pgbase,
3012 .pglen = pglen,
3013 .pages = &page,
3014 };
f50c7000 3015 struct nfs4_readlink_res res;
1da177e4
LT		 3016 struct rpc_message msg = {
3017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3018 .rpc_argp = &args,
f50c7000 3019 .rpc_resp = &res,
1da177e4
LT		 3020 };
3021
7c513058 3022 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3023}
3024
3025static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3026 unsigned int pgbase, unsigned int pglen)
3027{
3028 struct nfs4_exception exception = { };
3029 int err;
3030 do {
3031 err = nfs4_handle_exception(NFS_SERVER(inode),
3032 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3033 &exception);
3034 } while (exception.retry);
3035 return err;
3036}
3037
1da177e4 3038/*
8867fe58 3039 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3040 */
1da177e4
LT		 3041static int
3042nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3043 int flags)
1da177e4 3044{
8867fe58 3045 struct nfs_open_context *ctx;
1da177e4 3046 struct nfs4_state *state;
1da177e4
LT		 3047 int status = 0;
3048
8867fe58
MS		 3049 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3050 if (IS_ERR(ctx))
3051 return PTR_ERR(ctx);
3052
a8a5da99 3053 sattr->ia_mode &= ~current_umask();
4197a055 3054 state = nfs4_do_open(dir, ctx, flags, sattr);
d4d9cdcb 3055 d_drop(dentry);
1da177e4
LT		 3056 if (IS_ERR(state)) {
3057 status = PTR_ERR(state);
c0204fd2 3058 goto out;
1da177e4 3059 }
d4d9cdcb 3060 d_add(dentry, igrab(state->inode));
d75340cc 3061 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3062 ctx->state = state;
1da177e4 3063out:
8867fe58 3064 put_nfs_open_context(ctx);
1da177e4
LT		 3065 return status;
3066}
3067
3068static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3069{
16e42959 3070 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3071 struct nfs_removeargs args = {
1da177e4 3072 .fh = NFS_FH(dir),
26fe5750 3073 .name = *name,
16e42959 3074 };
4fdc17b2 3075 struct nfs_removeres res = {
16e42959 3076 .server = server,
1da177e4 3077 };
1da177e4 3078 struct rpc_message msg = {
4fdc17b2
TM		 3079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3080 .rpc_argp = &args,
3081 .rpc_resp = &res,
1da177e4 3082 };
778d2817 3083 int status;
1da177e4 3084
7c513058 3085 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3086 if (status == 0)
16e42959 3087 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3088 return status;
3089}
3090
3091static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3092{
3093 struct nfs4_exception exception = { };
3094 int err;
3095 do {
3096 err = nfs4_handle_exception(NFS_SERVER(dir),
3097 _nfs4_proc_remove(dir, name),
3098 &exception);
3099 } while (exception.retry);
3100 return err;
3101}
3102
e4eff1a6 3103static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3104{
e4eff1a6
TM		 3105 struct nfs_server *server = NFS_SERVER(dir);
3106 struct nfs_removeargs *args = msg->rpc_argp;
3107 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3108
e4eff1a6 3109 res->server = server;
1da177e4 3110 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3111 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3112}
3113
34e137cc
BS		 3114static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3115{
d9afbd1b
TM		 3116 nfs4_setup_sequence(NFS_SERVER(data->dir),
3117 &data->args.seq_args,
3118 &data->res.seq_res,
3119 task);
1da177e4
LT		 3120}
3121
e4eff1a6 3122static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3123{
e4eff1a6
TM		 3124 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3125
14516c3a
TM		 3126 if (!nfs4_sequence_done(task, &res->seq_res))
3127 return 0;
9e33bed5 3128 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3129 return 0;
3130 update_changeattr(dir, &res->cinfo);
e4eff1a6 3131 return 1;
1da177e4
LT		 3132}
3133
d3d4152a
JL		 3134static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3135{
3136 struct nfs_server *server = NFS_SERVER(dir);
3137 struct nfs_renameargs *arg = msg->rpc_argp;
3138 struct nfs_renameres *res = msg->rpc_resp;
3139
3140 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3141 res->server = server;
9d12b216 3142 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3143}
3144
c6bfa1a1
BS		 3145static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3146{
d9afbd1b
TM		 3147 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3148 &data->args.seq_args,
3149 &data->res.seq_res,
3150 task);
d3d4152a
JL		 3151}
3152
3153static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3154 struct inode *new_dir)
3155{
3156 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3157
3158 if (!nfs4_sequence_done(task, &res->seq_res))
3159 return 0;
3160 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3161 return 0;
3162
3163 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3164 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3165 return 1;
3166}
3167
1da177e4
LT		 3168static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3169 struct inode *new_dir, struct qstr *new_name)
3170{
6caf2c82 3171 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3172 struct nfs_renameargs arg = {
1da177e4
LT		 3173 .old_dir = NFS_FH(old_dir),
3174 .new_dir = NFS_FH(new_dir),
3175 .old_name = old_name,
3176 .new_name = new_name,
6caf2c82 3177 };
e8582a8b 3178 struct nfs_renameres res = {
6caf2c82 3179 .server = server,
1da177e4 3180 };
1da177e4
LT		 3181 struct rpc_message msg = {
3182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3183 .rpc_argp = &arg,
3184 .rpc_resp = &res,
3185 };
011fff72 3186 int status = -ENOMEM;
1da177e4 3187
7c513058 3188 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3189 if (!status) {
3190 update_changeattr(old_dir, &res.old_cinfo);
3191 update_changeattr(new_dir, &res.new_cinfo);
3192 }
3193 return status;
3194}
3195
3196static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3197 struct inode *new_dir, struct qstr *new_name)
3198{
3199 struct nfs4_exception exception = { };
3200 int err;
3201 do {
3202 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3203 _nfs4_proc_rename(old_dir, old_name,
3204 new_dir, new_name),
3205 &exception);
3206 } while (exception.retry);
3207 return err;
3208}
3209
3210static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3211{
91ba2eee 3212 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3213 struct nfs4_link_arg arg = {
3214 .fh = NFS_FH(inode),
3215 .dir_fh = NFS_FH(dir),
3216 .name = name,
91ba2eee
TM		 3217 .bitmask = server->attr_bitmask,
3218 };
91ba2eee
TM		 3219 struct nfs4_link_res res = {
3220 .server = server,
1da177e4 3221 };
1da177e4
LT		 3222 struct rpc_message msg = {
3223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3224 .rpc_argp = &arg,
91ba2eee 3225 .rpc_resp = &res,
1da177e4 3226 };
136f2627
TM		 3227 int status = -ENOMEM;
3228
3229 res.fattr = nfs_alloc_fattr();
778d2817 3230 if (res.fattr == NULL)
136f2627 3231 goto out;
1da177e4 3232
7c513058 3233 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3234 if (!status) {
3235 update_changeattr(dir, &res.cinfo);
73a3d07c 3236 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3237 }
136f2627 3238out:
136f2627 3239 nfs_free_fattr(res.fattr);
1da177e4
LT		 3240 return status;
3241}
3242
3243static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3244{
3245 struct nfs4_exception exception = { };
3246 int err;
3247 do {
3248 err = nfs4_handle_exception(NFS_SERVER(inode),
3249 _nfs4_proc_link(inode, dir, name),
3250 &exception);
3251 } while (exception.retry);
3252 return err;
3253}
3254
57dc9a57
TM		 3255struct nfs4_createdata {
3256 struct rpc_message msg;
3257 struct nfs4_create_arg arg;
3258 struct nfs4_create_res res;
3259 struct nfs_fh fh;
3260 struct nfs_fattr fattr;
57dc9a57
TM		 3261};
3262
3263static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3264 struct qstr *name, struct iattr *sattr, u32 ftype)
3265{
3266 struct nfs4_createdata *data;
3267
3268 data = kzalloc(sizeof(*data), GFP_KERNEL);
3269 if (data != NULL) {
3270 struct nfs_server *server = NFS_SERVER(dir);
3271
3272 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3273 data->msg.rpc_argp = &data->arg;
3274 data->msg.rpc_resp = &data->res;
3275 data->arg.dir_fh = NFS_FH(dir);
3276 data->arg.server = server;
3277 data->arg.name = name;
3278 data->arg.attrs = sattr;
3279 data->arg.ftype = ftype;
3280 data->arg.bitmask = server->attr_bitmask;
3281 data->res.server = server;
3282 data->res.fh = &data->fh;
3283 data->res.fattr = &data->fattr;
57dc9a57 3284 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3285 }
3286 return data;
3287}
3288
3289static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3290{
7c513058 3291 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3292 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3293 if (status == 0) {
3294 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3295 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3296 }
3297 return status;
3298}
3299
3300static void nfs4_free_createdata(struct nfs4_createdata *data)
3301{
3302 kfree(data);
3303}
3304
4f390c15 3305static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3306 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3307{
57dc9a57
TM		 3308 struct nfs4_createdata *data;
3309 int status = -ENAMETOOLONG;
1da177e4 3310
94a6d753 3311 if (len > NFS4_MAXPATHLEN)
57dc9a57 3312 goto out;
4f390c15 3313
57dc9a57
TM		 3314 status = -ENOMEM;
3315 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3316 if (data == NULL)
3317 goto out;
3318
3319 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3320 data->arg.u.symlink.pages = &page;
3321 data->arg.u.symlink.len = len;
1da177e4 3322
57dc9a57
TM		 3323 status = nfs4_do_create(dir, dentry, data);
3324
3325 nfs4_free_createdata(data);
3326out:
1da177e4
LT		 3327 return status;
3328}
3329
4f390c15 3330static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3331 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3332{
3333 struct nfs4_exception exception = { };
3334 int err;
3335 do {
3336 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3337 _nfs4_proc_symlink(dir, dentry, page,
3338 len, sattr),
1da177e4
LT		 3339 &exception);
3340 } while (exception.retry);
3341 return err;
3342}
3343
3344static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3345 struct iattr *sattr)
3346{
57dc9a57
TM		 3347 struct nfs4_createdata *data;
3348 int status = -ENOMEM;
1da177e4 3349
57dc9a57
TM		 3350 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3351 if (data == NULL)
3352 goto out;
3353
3354 status = nfs4_do_create(dir, dentry, data);
3355
3356 nfs4_free_createdata(data);
3357out:
1da177e4
LT		 3358 return status;
3359}
3360
3361static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3362 struct iattr *sattr)
3363{
3364 struct nfs4_exception exception = { };
3365 int err;
a8a5da99
AK		 3366
3367 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3368 do {
3369 err = nfs4_handle_exception(NFS_SERVER(dir),
3370 _nfs4_proc_mkdir(dir, dentry, sattr),
3371 &exception);
3372 } while (exception.retry);
3373 return err;
3374}
3375
3376static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3377 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3378{
3379 struct inode *dir = dentry->d_inode;
3380 struct nfs4_readdir_arg args = {
3381 .fh = NFS_FH(dir),
56e4ebf8 3382 .pages = pages,
1da177e4
LT		 3383 .pgbase = 0,
3384 .count = count,
96d25e53 3385 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3386 .plus = plus,
1da177e4
LT		 3387 };
3388 struct nfs4_readdir_res res;
3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3391 .rpc_argp = &args,
3392 .rpc_resp = &res,
3393 .rpc_cred = cred,
3394 };
3395 int status;
3396
3110ff80 3397 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3398 dentry->d_parent->d_name.name,
3399 dentry->d_name.name,
3400 (unsigned long long)cookie);
c3f52af3 3401 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3402 res.pgbase = args.pgbase;
7c513058 3403 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3404 if (status >= 0) {
c3f52af3 3405 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3406 status += args.pgbase;
3407 }
c4812998
TM		 3408
3409 nfs_invalidate_atime(dir);
3410
3110ff80 3411 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3412 return status;
3413}
3414
3415static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3416 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3417{
3418 struct nfs4_exception exception = { };
3419 int err;
3420 do {
3421 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3422 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3423 pages, count, plus),
1da177e4
LT		 3424 &exception);
3425 } while (exception.retry);
3426 return err;
3427}
3428
3429static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3430 struct iattr *sattr, dev_t rdev)
3431{
57dc9a57
TM		 3432 struct nfs4_createdata *data;
3433 int mode = sattr->ia_mode;
3434 int status = -ENOMEM;
1da177e4 3435
57dc9a57
TM		 3436 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3437 if (data == NULL)
3438 goto out;
3439
1da177e4 3440 if (S_ISFIFO(mode))
57dc9a57 3441 data->arg.ftype = NF4FIFO;
1da177e4 3442 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3443 data->arg.ftype = NF4BLK;
3444 data->arg.u.device.specdata1 = MAJOR(rdev);
3445 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3446 }
3447 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3448 data->arg.ftype = NF4CHR;
3449 data->arg.u.device.specdata1 = MAJOR(rdev);
3450 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3451 } else if (!S_ISSOCK(mode)) {
3452 status = -EINVAL;
3453 goto out_free;
1da177e4 3454 }
1da177e4 3455
57dc9a57 3456 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3457out_free:
57dc9a57
TM		 3458 nfs4_free_createdata(data);
3459out:
1da177e4
LT		 3460 return status;
3461}
3462
3463static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3464 struct iattr *sattr, dev_t rdev)
3465{
3466 struct nfs4_exception exception = { };
3467 int err;
a8a5da99
AK		 3468
3469 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3470 do {
3471 err = nfs4_handle_exception(NFS_SERVER(dir),
3472 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3473 &exception);
3474 } while (exception.retry);
3475 return err;
3476}
3477
3478static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3479 struct nfs_fsstat *fsstat)
3480{
3481 struct nfs4_statfs_arg args = {
3482 .fh = fhandle,
3483 .bitmask = server->attr_bitmask,
3484 };
24ad148a
BH		 3485 struct nfs4_statfs_res res = {
3486 .fsstat = fsstat,
3487 };
1da177e4
LT		 3488 struct rpc_message msg = {
3489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3490 .rpc_argp = &args,
24ad148a 3491 .rpc_resp = &res,
1da177e4
LT		 3492 };
3493
0e574af1 3494 nfs_fattr_init(fsstat->fattr);
7c513058 3495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3496}
3497
3498static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3499{
3500 struct nfs4_exception exception = { };
3501 int err;
3502 do {
3503 err = nfs4_handle_exception(server,
3504 _nfs4_proc_statfs(server, fhandle, fsstat),
3505 &exception);
3506 } while (exception.retry);
3507 return err;
3508}
3509
3510static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3511 struct nfs_fsinfo *fsinfo)
3512{
3513 struct nfs4_fsinfo_arg args = {
3514 .fh = fhandle,
3515 .bitmask = server->attr_bitmask,
3516 };
3dda5e43
BH		 3517 struct nfs4_fsinfo_res res = {
3518 .fsinfo = fsinfo,
3519 };
1da177e4
LT		 3520 struct rpc_message msg = {
3521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3522 .rpc_argp = &args,
3dda5e43 3523 .rpc_resp = &res,
1da177e4
LT		 3524 };
3525
7c513058 3526 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3527}
3528
3529static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3530{
3531 struct nfs4_exception exception = { };
83ca7f5a 3532 unsigned long now = jiffies;
1da177e4
LT		 3533 int err;
3534
3535 do {
83ca7f5a
CL		 3536 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3537 if (err == 0) {
3538 struct nfs_client *clp = server->nfs_client;
3539
3540 spin_lock(&clp->cl_lock);
3541 clp->cl_lease_time = fsinfo->lease_time * HZ;
3542 clp->cl_last_renewal = now;
3543 spin_unlock(&clp->cl_lock);
3544 break;
3545 }
3546 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3547 } while (exception.retry);
3548 return err;
3549}
3550
3551static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3552{
e38eb650
BS		 3553 int error;
3554
0e574af1 3555 nfs_fattr_init(fsinfo->fattr);
e38eb650 3556 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3557 if (error == 0) {
3558 /* block layout checks this! */
3559 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3560 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3561 }
e38eb650
BS		 3562
3563 return error;
1da177e4
LT		 3564}
3565
3566static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3567 struct nfs_pathconf *pathconf)
3568{
3569 struct nfs4_pathconf_arg args = {
3570 .fh = fhandle,
3571 .bitmask = server->attr_bitmask,
3572 };
d45b2989
BH		 3573 struct nfs4_pathconf_res res = {
3574 .pathconf = pathconf,
3575 };
1da177e4
LT		 3576 struct rpc_message msg = {
3577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3578 .rpc_argp = &args,
d45b2989 3579 .rpc_resp = &res,
1da177e4
LT		 3580 };
3581
3582 /* None of the pathconf attributes are mandatory to implement */
3583 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3584 memset(pathconf, 0, sizeof(*pathconf));
3585 return 0;
3586 }
3587
0e574af1 3588 nfs_fattr_init(pathconf->fattr);
7c513058 3589 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3590}
3591
3592static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3593 struct nfs_pathconf *pathconf)
3594{
3595 struct nfs4_exception exception = { };
3596 int err;
3597
3598 do {
3599 err = nfs4_handle_exception(server,
3600 _nfs4_proc_pathconf(server, fhandle, pathconf),
3601 &exception);
3602 } while (exception.retry);
3603 return err;
3604}
3605
5521abfd 3606int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3607 const struct nfs_open_context *ctx,
3608 const struct nfs_lock_context *l_ctx,
3609 fmode_t fmode)
3610{
3611 const struct nfs_lockowner *lockowner = NULL;
3612
3613 if (l_ctx != NULL)
3614 lockowner = &l_ctx->lockowner;
5521abfd 3615 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3616}
3617EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3618
5521abfd
TM		 3619static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3620 const struct nfs_open_context *ctx,
3621 const struct nfs_lock_context *l_ctx,
3622 fmode_t fmode)
3623{
3624 nfs4_stateid current_stateid;
3625
3626 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3627 return false;
3628 return nfs4_stateid_match(stateid, &current_stateid);
3629}
3630
3631static bool nfs4_error_stateid_expired(int err)
3632{
3633 switch (err) {
3634 case -NFS4ERR_DELEG_REVOKED:
3635 case -NFS4ERR_ADMIN_REVOKED:
3636 case -NFS4ERR_BAD_STATEID:
3637 case -NFS4ERR_STALE_STATEID:
3638 case -NFS4ERR_OLD_STATEID:
3639 case -NFS4ERR_OPENMODE:
3640 case -NFS4ERR_EXPIRED:
3641 return true;
3642 }
3643 return false;
3644}
3645
d20581aa
BH		 3646void __nfs4_read_done_cb(struct nfs_read_data *data)
3647{
cd841605 3648 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3649}
3650
cbdabc7f 3651static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3652{
cd841605 3653 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3654
9e33bed5 3655 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3656 rpc_restart_call_prepare(task);
ec06c096 3657 return -EAGAIN;
1da177e4 3658 }
8850df99 3659
d20581aa 3660 __nfs4_read_done_cb(data);
1da177e4 3661 if (task->tk_status > 0)
ec06c096
TM		 3662 renew_lease(server, data->timestamp);
3663 return 0;
1da177e4
LT		 3664}
3665
5521abfd
TM		 3666static bool nfs4_read_stateid_changed(struct rpc_task *task,
3667 struct nfs_readargs *args)
3668{
3669
3670 if (!nfs4_error_stateid_expired(task->tk_status) ||
3671 nfs4_stateid_is_current(&args->stateid,
3672 args->context,
3673 args->lock_context,
3674 FMODE_READ))
3675 return false;
3676 rpc_restart_call_prepare(task);
3677 return true;
3678}
3679
cbdabc7f
AA		 3680static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3681{
3682
3683 dprintk("--> %s\n", __func__);
3684
3685 if (!nfs4_sequence_done(task, &data->res.seq_res))
3686 return -EAGAIN;
5521abfd
TM		 3687 if (nfs4_read_stateid_changed(task, &data->args))
3688 return -EAGAIN;
d20581aa
BH		 3689 return data->read_done_cb ? data->read_done_cb(task, data) :
3690 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3691}
3692
bdc7f021 3693static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3694{
1da177e4 3695 data->timestamp = jiffies;
cbdabc7f 3696 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3697 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3698 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3699}
3700
ea7c3303
BS		 3701static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3702{
9b206149 3703 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3704 &data->args.seq_args,
3705 &data->res.seq_res,
9b206149
TM		 3706 task))
3707 return;
3708 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3709 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3710}
3711
b029bc9b 3712static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3713{
cd841605 3714 struct inode *inode = data->header->inode;
1da177e4 3715
9e33bed5 3716 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3717 rpc_restart_call_prepare(task);
788e7a89 3718 return -EAGAIN;
1da177e4 3719 }
4f9838c7 3720 if (task->tk_status >= 0) {
1da177e4 3721 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3722 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3723 }
788e7a89 3724 return 0;
1da177e4
LT		 3725}
3726
5521abfd
TM		 3727static bool nfs4_write_stateid_changed(struct rpc_task *task,
3728 struct nfs_writeargs *args)
3729{
3730
3731 if (!nfs4_error_stateid_expired(task->tk_status) ||
3732 nfs4_stateid_is_current(&args->stateid,
3733 args->context,
3734 args->lock_context,
3735 FMODE_WRITE))
3736 return false;
3737 rpc_restart_call_prepare(task);
3738 return true;
3739}
3740
b029bc9b
FI		 3741static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3742{
3743 if (!nfs4_sequence_done(task, &data->res.seq_res))
3744 return -EAGAIN;
5521abfd
TM		 3745 if (nfs4_write_stateid_changed(task, &data->args))
3746 return -EAGAIN;
d20581aa
BH		 3747 return data->write_done_cb ? data->write_done_cb(task, data) :
3748 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3749}
3750
5a37f851
TM		 3751static
3752bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3753{
5a37f851
TM		 3754 const struct nfs_pgio_header *hdr = data->header;
3755
3756 /* Don't request attributes for pNFS or O_DIRECT writes */
3757 if (data->ds_clp != NULL || hdr->dreq != NULL)
3758 return false;
3759 /* Otherwise, request attributes if and only if we don't hold
3760 * a delegation
3761 */
011e2a7f 3762 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3763}
a69aef14 3764
bdc7f021 3765static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3766{
cd841605 3767 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3768
5a37f851 3769 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3770 data->args.bitmask = NULL;
3771 data->res.fattr = NULL;
3772 } else
3773 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3774
b029bc9b
FI		 3775 if (!data->write_done_cb)
3776 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3777 data->res.server = server;
1da177e4
LT		 3778 data->timestamp = jiffies;
3779
bdc7f021 3780 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3781 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3782}
3783
c6cb80d0
BS		 3784static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3785{
9b206149 3786 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3787 &data->args.seq_args,
3788 &data->res.seq_res,
9b206149
TM		 3789 task))
3790 return;
3791 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3792 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3793}
3794
0b7c0153 3795static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3796{
d9afbd1b
TM		 3797 nfs4_setup_sequence(NFS_SERVER(data->inode),
3798 &data->args.seq_args,
3799 &data->res.seq_res,
3800 task);
1da177e4
LT		 3801}
3802
0b7c0153 3803static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3804{
1da177e4 3805 struct inode *inode = data->inode;
14516c3a 3806
9e33bed5 3807 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3808 rpc_restart_call_prepare(task);
788e7a89 3809 return -EAGAIN;
1da177e4 3810 }
788e7a89 3811 return 0;
1da177e4
LT		 3812}
3813
0b7c0153 3814static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3815{
3816 if (!nfs4_sequence_done(task, &data->res.seq_res))
3817 return -EAGAIN;
0b7c0153 3818 return data->commit_done_cb(task, data);
5f452431
FI		 3819}
3820
0b7c0153 3821static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3822{
788e7a89 3823 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3824
0b7c0153
FI		 3825 if (data->commit_done_cb == NULL)
3826 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3827 data->res.server = server;
bdc7f021 3828 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3829 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3830}
3831
9bc4e3ca
CL		 3832struct nfs4_renewdata {
3833 struct nfs_client *client;
3834 unsigned long timestamp;
3835};
3836
1da177e4
LT		 3837/*
3838 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3839 * standalone procedure for queueing an asynchronous RENEW.
3840 */
9bc4e3ca 3841static void nfs4_renew_release(void *calldata)
dc96aef9 3842{
9bc4e3ca
CL		 3843 struct nfs4_renewdata *data = calldata;
3844 struct nfs_client *clp = data->client;
dc96aef9 3845
0851de06
AB		 3846 if (atomic_read(&clp->cl_count) > 1)
3847 nfs4_schedule_state_renewal(clp);
3848 nfs_put_client(clp);
9bc4e3ca 3849 kfree(data);
dc96aef9
AB		 3850}
3851
9bc4e3ca 3852static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3853{
9bc4e3ca
CL		 3854 struct nfs4_renewdata *data = calldata;
3855 struct nfs_client *clp = data->client;
3856 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3857
3858 if (task->tk_status < 0) {
95baa25c 3859 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3860 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3861 return;
3862 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3863 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3864 return;
3865 }
3866 nfs4_schedule_path_down_recovery(clp);
1da177e4 3867 }
452e9352 3868 do_renew_lease(clp, timestamp);
1da177e4
LT		 3869}
3870
963d8fe5
TM		 3871static const struct rpc_call_ops nfs4_renew_ops = {
3872 .rpc_call_done = nfs4_renew_done,
dc96aef9 3873 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3874};
3875
2f60ea6b 3876static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3877{
3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3880 .rpc_argp = clp,
b4454fe1 3881 .rpc_cred = cred,
1da177e4 3882 };
9bc4e3ca 3883 struct nfs4_renewdata *data;
1da177e4 3884
2f60ea6b
TM		 3885 if (renew_flags == 0)
3886 return 0;
0851de06
AB		 3887 if (!atomic_inc_not_zero(&clp->cl_count))
3888 return -EIO;
b569ad34 3889 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3890 if (data == NULL)
3891 return -ENOMEM;
3892 data->client = clp;
3893 data->timestamp = jiffies;
bc7a05ca 3894 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3895 &nfs4_renew_ops, data);
1da177e4
LT		 3896}
3897
8534d4ec 3898static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3899{
3900 struct rpc_message msg = {
3901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3902 .rpc_argp = clp,
b4454fe1 3903 .rpc_cred = cred,
1da177e4
LT		 3904 };
3905 unsigned long now = jiffies;
3906 int status;
3907
bc7a05ca 3908 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3909 if (status < 0)
3910 return status;
452e9352 3911 do_renew_lease(clp, now);
1da177e4
LT		 3912 return 0;
3913}
3914
aa1870af
BF		 3915static inline int nfs4_server_supports_acls(struct nfs_server *server)
3916{
3917 return (server->caps & NFS_CAP_ACLS)
3918 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3919 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3920}
3921
21f498c2
TM		 3922/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3923 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3924 * the stack.
3925 */
21f498c2 3926#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3927
e9e3d724
NH		 3928static int buf_to_pages_noslab(const void *buf, size_t buflen,
3929 struct page **pages, unsigned int *pgbase)
3930{
3931 struct page *newpage, **spages;
3932 int rc = 0;
3933 size_t len;
3934 spages = pages;
3935
3936 do {
21f498c2 3937 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3938 newpage = alloc_page(GFP_KERNEL);
3939
3940 if (newpage == NULL)
3941 goto unwind;
3942 memcpy(page_address(newpage), buf, len);
3943 buf += len;
3944 buflen -= len;
3945 *pages++ = newpage;
3946 rc++;
3947 } while (buflen != 0);
3948
3949 return rc;
3950
3951unwind:
3952 for(; rc > 0; rc--)
3953 __free_page(spages[rc-1]);
3954 return -ENOMEM;
3955}
3956
e50a1c2e
BF		 3957struct nfs4_cached_acl {
3958 int cached;
3959 size_t len;
3e9d4154 3960 char data[0];
e50a1c2e
BF		 3961};
3962
3963static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3964{
3965 struct nfs_inode *nfsi = NFS_I(inode);
3966
3967 spin_lock(&inode->i_lock);
3968 kfree(nfsi->nfs4_acl);
3969 nfsi->nfs4_acl = acl;
3970 spin_unlock(&inode->i_lock);
3971}
3972
3973static void nfs4_zap_acl_attr(struct inode *inode)
3974{
3975 nfs4_set_cached_acl(inode, NULL);
3976}
3977
3978static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3979{
3980 struct nfs_inode *nfsi = NFS_I(inode);
3981 struct nfs4_cached_acl *acl;
3982 int ret = -ENOENT;
3983
3984 spin_lock(&inode->i_lock);
3985 acl = nfsi->nfs4_acl;
3986 if (acl == NULL)
3987 goto out;
3988 if (buf == NULL) /* user is just asking for length */
3989 goto out_len;
3990 if (acl->cached == 0)
3991 goto out;
3992 ret = -ERANGE; /* see getxattr(2) man page */
3993 if (acl->len > buflen)
3994 goto out;
3995 memcpy(buf, acl->data, acl->len);
3996out_len:
3997 ret = acl->len;
3998out:
3999 spin_unlock(&inode->i_lock);
4000 return ret;
4001}
4002
5794d21e 4003static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4004{
4005 struct nfs4_cached_acl *acl;
b291f1b1 4006 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4007
1f1ea6c2 4008 if (buflen <= PAGE_SIZE) {
b291f1b1 4009 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4010 if (acl == NULL)
4011 goto out;
4012 acl->cached = 1;
5794d21e 4013 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4014 } else {
4015 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4016 if (acl == NULL)
4017 goto out;
4018 acl->cached = 0;
4019 }
4020 acl->len = acl_len;
4021out:
4022 nfs4_set_cached_acl(inode, acl);
4023}
4024
bf118a34
AA		 4025/*
4026 * The getxattr API returns the required buffer length when called with a
4027 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4028 * the required buf. On a NULL buf, we send a page of data to the server
4029 * guessing that the ACL request can be serviced by a page. If so, we cache
4030 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4031 * the cache. If not so, we throw away the page, and cache the required
4032 * length. The next getxattr call will then produce another round trip to
4033 * the server, this time with the input buf of the required size.
4034 */
16b4289c 4035static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4036{
bf118a34 4037 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4038 struct nfs_getaclargs args = {
4039 .fh = NFS_FH(inode),
4040 .acl_pages = pages,
4041 .acl_len = buflen,
4042 };
663c79b3
BH		 4043 struct nfs_getaclres res = {
4044 .acl_len = buflen,
4045 };
aa1870af
BF		 4046 struct rpc_message msg = {
4047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4048 .rpc_argp = &args,
663c79b3 4049 .rpc_resp = &res,
aa1870af 4050 };
21f498c2
TM		 4051 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4052 int ret = -ENOMEM, i;
aa1870af 4053
bf118a34
AA		 4054 /* As long as we're doing a round trip to the server anyway,
4055 * let's be prepared for a page of acl data. */
4056 if (npages == 0)
4057 npages = 1;
21f498c2
TM		 4058 if (npages > ARRAY_SIZE(pages))
4059 return -ERANGE;
5a006899 4060
bf118a34
AA		 4061 for (i = 0; i < npages; i++) {
4062 pages[i] = alloc_page(GFP_KERNEL);
4063 if (!pages[i])
4064 goto out_free;
e50a1c2e 4065 }
5a006899
SP		 4066
4067 /* for decoding across pages */
4068 res.acl_scratch = alloc_page(GFP_KERNEL);
4069 if (!res.acl_scratch)
4070 goto out_free;
4071
bf118a34
AA		 4072 args.acl_len = npages * PAGE_SIZE;
4073 args.acl_pgbase = 0;
5a006899 4074
de040bec 4075 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4076 __func__, buf, buflen, npages, args.acl_len);
4077 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4078 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4079 if (ret)
4080 goto out_free;
bf118a34 4081
1f1ea6c2
TM		 4082 /* Handle the case where the passed-in buffer is too short */
4083 if (res.acl_flags & NFS4_ACL_TRUNC) {
4084 /* Did the user only issue a request for the acl length? */
4085 if (buf == NULL)
4086 goto out_ok;
e50a1c2e 4087 ret = -ERANGE;
1f1ea6c2 4088 goto out_free;
e50a1c2e 4089 }
1f1ea6c2 4090 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4091 if (buf) {
4092 if (res.acl_len > buflen) {
4093 ret = -ERANGE;
4094 goto out_free;
4095 }
1f1ea6c2 4096 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4097 }
1f1ea6c2
TM		 4098out_ok:
4099 ret = res.acl_len;
e50a1c2e 4100out_free:
bf118a34
AA		 4101 for (i = 0; i < npages; i++)
4102 if (pages[i])
4103 __free_page(pages[i]);
331818f1
TM		 4104 if (res.acl_scratch)
4105 __free_page(res.acl_scratch);
aa1870af
BF		 4106 return ret;
4107}
4108
16b4289c
TM		 4109static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4110{
4111 struct nfs4_exception exception = { };
4112 ssize_t ret;
4113 do {
4114 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4115 if (ret >= 0)
4116 break;
4117 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4118 } while (exception.retry);
4119 return ret;
4120}
4121
e50a1c2e
BF		 4122static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4123{
4124 struct nfs_server *server = NFS_SERVER(inode);
4125 int ret;
4126
4127 if (!nfs4_server_supports_acls(server))
4128 return -EOPNOTSUPP;
4129 ret = nfs_revalidate_inode(server, inode);
4130 if (ret < 0)
4131 return ret;
08a22b39
AK		 4132 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4133 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4134 ret = nfs4_read_cached_acl(inode, buf, buflen);
4135 if (ret != -ENOENT)
bf118a34
AA		 4136 /* -ENOENT is returned if there is no ACL or if there is an ACL
4137 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4138 return ret;
4139 return nfs4_get_acl_uncached(inode, buf, buflen);
4140}
4141
16b4289c 4142static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4143{
4144 struct nfs_server *server = NFS_SERVER(inode);
4145 struct page *pages[NFS4ACL_MAXPAGES];
4146 struct nfs_setaclargs arg = {
4147 .fh = NFS_FH(inode),
4148 .acl_pages = pages,
4149 .acl_len = buflen,
4150 };
73c403a9 4151 struct nfs_setaclres res;
4b580ee3
BF		 4152 struct rpc_message msg = {
4153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4154 .rpc_argp = &arg,
73c403a9 4155 .rpc_resp = &res,
4b580ee3 4156 };
21f498c2 4157 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4158 int ret, i;
4b580ee3
BF		 4159
4160 if (!nfs4_server_supports_acls(server))
4161 return -EOPNOTSUPP;
21f498c2
TM		 4162 if (npages > ARRAY_SIZE(pages))
4163 return -ERANGE;
e9e3d724
NH		 4164 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4165 if (i < 0)
4166 return i;
57ec14c5 4167 nfs4_inode_return_delegation(inode);
7c513058 4168 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4169
4170 /*
4171 * Free each page after tx, so the only ref left is
4172 * held by the network stack
4173 */
4174 for (; i > 0; i--)
4175 put_page(pages[i-1]);
4176
08a22b39
AK		 4177 /*
4178 * Acl update can result in inode attribute update.
4179 * so mark the attribute cache invalid.
4180 */
4181 spin_lock(&inode->i_lock);
4182 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4183 spin_unlock(&inode->i_lock);
f41f7418
TM		 4184 nfs_access_zap_cache(inode);
4185 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4186 return ret;
4187}
4188
16b4289c
TM		 4189static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4190{
4191 struct nfs4_exception exception = { };
4192 int err;
4193 do {
4194 err = nfs4_handle_exception(NFS_SERVER(inode),
4195 __nfs4_proc_set_acl(inode, buf, buflen),
4196 &exception);
4197 } while (exception.retry);
4198 return err;
4199}
4200
1da177e4 4201static int
aa5190d0 4202nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4203{
aa5190d0
TM		 4204 struct nfs_client *clp = server->nfs_client;
4205
4206 if (task->tk_status >= 0)
1da177e4
LT		 4207 return 0;
4208 switch(task->tk_status) {
a1d0b5ee 4209 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4210 case -NFS4ERR_ADMIN_REVOKED:
4211 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4212 if (state == NULL)
4213 break;
4214 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4215 case -NFS4ERR_OPENMODE:
4216 if (state == NULL)
4217 break;
5d422301
TM		 4218 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4219 goto stateid_invalid;
0400a6b0 4220 goto wait_on_recovery;
0ced63d1 4221 case -NFS4ERR_EXPIRED:
5d422301
TM		 4222 if (state != NULL) {
4223 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4224 goto stateid_invalid;
4225 }
1da177e4 4226 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4227 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4228 nfs4_schedule_lease_recovery(clp);
4229 goto wait_on_recovery;
4745e315
AA		 4230#if defined(CONFIG_NFS_V4_1)
4231 case -NFS4ERR_BADSESSION:
4232 case -NFS4ERR_BADSLOT:
4233 case -NFS4ERR_BAD_HIGH_SLOT:
4234 case -NFS4ERR_DEADSESSION:
4235 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4236 case -NFS4ERR_SEQ_FALSE_RETRY:
4237 case -NFS4ERR_SEQ_MISORDERED:
4238 dprintk("%s ERROR %d, Reset session\n", __func__,
4239 task->tk_status);
9f594791 4240 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4241 task->tk_status = 0;
4242 return -EAGAIN;
4243#endif /* CONFIG_NFS_V4_1 */
1da177e4 4244 case -NFS4ERR_DELAY:
aa5190d0 4245 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4246 case -NFS4ERR_GRACE:
1da177e4
LT		 4247 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4248 task->tk_status = 0;
4249 return -EAGAIN;
a8a4ae3a 4250 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4251 case -NFS4ERR_OLD_STATEID:
4252 task->tk_status = 0;
4253 return -EAGAIN;
4254 }
4255 task->tk_status = nfs4_map_errors(task->tk_status);
4256 return 0;
5d422301
TM		 4257stateid_invalid:
4258 task->tk_status = -EIO;
4259 return 0;
0400a6b0 4260wait_on_recovery:
a2c0b9e2 4261 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4262 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4263 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4264 task->tk_status = 0;
4265 return -EAGAIN;
1da177e4
LT		 4266}
4267
f092075d
CL		 4268static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4269 nfs4_verifier *bootverf)
cd93710e
CL		 4270{
4271 __be32 verf[2];
4272
2c820d9a
CL		 4273 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4274 /* An impossible timestamp guarantees this value
4275 * will never match a generated boot time. */
4276 verf[0] = 0;
4277 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4278 } else {
f092075d
CL		 4279 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4280 verf[0] = (__be32)nn->boot_time.tv_sec;
4281 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4282 }
cd93710e
CL		 4283 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4284}
4285
e984a55a
CL		 4286static unsigned int
4287nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4288 char *buf, size_t len)
4289{
4290 unsigned int result;
4291
4292 rcu_read_lock();
4293 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4294 clp->cl_ipaddr,
4295 rpc_peeraddr2str(clp->cl_rpcclient,
4296 RPC_DISPLAY_ADDR),
4297 rpc_peeraddr2str(clp->cl_rpcclient,
4298 RPC_DISPLAY_PROTO));
4299 rcu_read_unlock();
4300 return result;
4301}
4302
4303static unsigned int
4304nfs4_init_uniform_client_string(const struct nfs_client *clp,
4305 char *buf, size_t len)
4306{
6f2ea7f2
CL		 4307 char *nodename = clp->cl_rpcclient->cl_nodename;
4308
4309 if (nfs4_client_id_uniquifier[0] != '\0')
4310 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4311 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4312 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4313 nodename);
e984a55a
CL		 4314}
4315
6bbb4ae8
CL		 4316/**
4317 * nfs4_proc_setclientid - Negotiate client ID
4318 * @clp: state data structure
4319 * @program: RPC program for NFSv4 callback service
4320 * @port: IP port number for NFS4 callback service
4321 * @cred: RPC credential to use for this call
4322 * @res: where to place the result
4323 *
4324 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4325 */
bb8b27e5
TM		 4326int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4327 unsigned short port, struct rpc_cred *cred,
4328 struct nfs4_setclientid_res *res)
1da177e4
LT		 4329{
4330 nfs4_verifier sc_verifier;
4331 struct nfs4_setclientid setclientid = {
4332 .sc_verifier = &sc_verifier,
4333 .sc_prog = program,
f4eecd5d 4334 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4335 };
4336 struct rpc_message msg = {
4337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4338 .rpc_argp = &setclientid,
bb8b27e5 4339 .rpc_resp = res,
286d7d6a 4340 .rpc_cred = cred,
1da177e4 4341 };
6bbb4ae8 4342 int status;
1da177e4 4343
de734831 4344 /* nfs_client_id4 */
f092075d 4345 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4346 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4347 setclientid.sc_name_len =
4348 nfs4_init_uniform_client_string(clp,
4349 setclientid.sc_name,
4350 sizeof(setclientid.sc_name));
4351 else
4352 setclientid.sc_name_len =
4353 nfs4_init_nonuniform_client_string(clp,
4354 setclientid.sc_name,
4355 sizeof(setclientid.sc_name));
de734831 4356 /* cb_client4 */
e984a55a 4357 rcu_read_lock();
de734831 4358 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4359 sizeof(setclientid.sc_netid),
4360 rpc_peeraddr2str(clp->cl_rpcclient,
4361 RPC_DISPLAY_NETID));
de734831
CL		 4362 rcu_read_unlock();
4363 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4364 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4365 clp->cl_ipaddr, port >> 8, port & 255);
4366
6bbb4ae8
CL		 4367 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4368 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4369 setclientid.sc_name_len, setclientid.sc_name);
4370 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4371 dprintk("NFS reply setclientid: %d\n", status);
4372 return status;
1da177e4
LT		 4373}
4374
6bbb4ae8
CL		 4375/**
4376 * nfs4_proc_setclientid_confirm - Confirm client ID
4377 * @clp: state data structure
4378 * @res: result of a previous SETCLIENTID
4379 * @cred: RPC credential to use for this call
4380 *
4381 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4382 */
fd954ae1 4383int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4384 struct nfs4_setclientid_res *arg,
4385 struct rpc_cred *cred)
1da177e4 4386{
1da177e4
LT		 4387 struct rpc_message msg = {
4388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4389 .rpc_argp = arg,
286d7d6a 4390 .rpc_cred = cred,
1da177e4 4391 };
1da177e4
LT		 4392 int status;
4393
6bbb4ae8
CL		 4394 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4395 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4396 clp->cl_clientid);
1bd714f2 4397 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4398 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4399 return status;
4400}
4401
fe650407
TM		 4402struct nfs4_delegreturndata {
4403 struct nfs4_delegreturnargs args;
fa178f29 4404 struct nfs4_delegreturnres res;
fe650407
TM		 4405 struct nfs_fh fh;
4406 nfs4_stateid stateid;
26e976a8 4407 unsigned long timestamp;
fa178f29 4408 struct nfs_fattr fattr;
fe650407
TM		 4409 int rpc_status;
4410};
4411
fe650407
TM		 4412static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4413{
4414 struct nfs4_delegreturndata *data = calldata;
938e1010 4415
14516c3a
TM		 4416 if (!nfs4_sequence_done(task, &data->res.seq_res))
4417 return;
938e1010 4418
79708861
RL		 4419 switch (task->tk_status) {
4420 case -NFS4ERR_STALE_STATEID:
4421 case -NFS4ERR_EXPIRED:
4422 case 0:
fa178f29 4423 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4424 break;
4425 default:
4426 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4427 -EAGAIN) {
d00c5d43 4428 rpc_restart_call_prepare(task);
79708861
RL		 4429 return;
4430 }
4431 }
4432 data->rpc_status = task->tk_status;
fe650407
TM		 4433}
4434
4435static void nfs4_delegreturn_release(void *calldata)
4436{
fe650407
TM		 4437 kfree(calldata);
4438}
4439
938e1010
AA		 4440#if defined(CONFIG_NFS_V4_1)
4441static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4442{
4443 struct nfs4_delegreturndata *d_data;
4444
4445 d_data = (struct nfs4_delegreturndata *)data;
4446
d9afbd1b
TM		 4447 nfs4_setup_sequence(d_data->res.server,
4448 &d_data->args.seq_args,
4449 &d_data->res.seq_res,
4450 task);
938e1010
AA		 4451}
4452#endif /* CONFIG_NFS_V4_1 */
4453
c8d149f3 4454static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4455#if defined(CONFIG_NFS_V4_1)
4456 .rpc_call_prepare = nfs4_delegreturn_prepare,
4457#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4458 .rpc_call_done = nfs4_delegreturn_done,
4459 .rpc_release = nfs4_delegreturn_release,
4460};
4461
e6f81075 4462static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4463{
4464 struct nfs4_delegreturndata *data;
fa178f29 4465 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4466 struct rpc_task *task;
5138fde0
TM		 4467 struct rpc_message msg = {
4468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4469 .rpc_cred = cred,
4470 };
c970aa85
TM		 4471 struct rpc_task_setup task_setup_data = {
4472 .rpc_client = server->client,
5138fde0 4473 .rpc_message = &msg,
c970aa85
TM		 4474 .callback_ops = &nfs4_delegreturn_ops,
4475 .flags = RPC_TASK_ASYNC,
4476 };
e6f81075 4477 int status = 0;
fe650407 4478
8535b2be 4479 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4480 if (data == NULL)
4481 return -ENOMEM;
9d12b216 4482 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4483 data->args.fhandle = &data->fh;
4484 data->args.stateid = &data->stateid;
9e907fec 4485 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4486 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4487 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4488 data->res.fattr = &data->fattr;
4489 data->res.server = server;
5138fde0 4490 nfs_fattr_init(data->res.fattr);
26e976a8 4491 data->timestamp = jiffies;
fe650407
TM		 4492 data->rpc_status = 0;
4493
c970aa85 4494 task_setup_data.callback_data = data;
1174dd1f
TM		 4495 msg.rpc_argp = &data->args;
4496 msg.rpc_resp = &data->res;
c970aa85 4497 task = rpc_run_task(&task_setup_data);
7a1218a2 4498 if (IS_ERR(task))
fe650407 4499 return PTR_ERR(task);
e6f81075
TM		 4500 if (!issync)
4501 goto out;
fe650407 4502 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4503 if (status != 0)
4504 goto out;
4505 status = data->rpc_status;
e144cbcc
TM		 4506 if (status == 0)
4507 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4508 else
4509 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4510out:
e6b3c4db 4511 rpc_put_task(task);
fe650407 4512 return status;
1da177e4
LT		 4513}
4514
e6f81075 4515int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4516{
4517 struct nfs_server *server = NFS_SERVER(inode);
4518 struct nfs4_exception exception = { };
4519 int err;
4520 do {
e6f81075 4521 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4522 switch (err) {
4523 case -NFS4ERR_STALE_STATEID:
4524 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4525 case 0:
4526 return 0;
4527 }
4528 err = nfs4_handle_exception(server, err, &exception);
4529 } while (exception.retry);
4530 return err;
4531}
4532
4533#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4534#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4535
4536/*
4537 * sleep, with exponential backoff, and retry the LOCK operation.
4538 */
4539static unsigned long
4540nfs4_set_lock_task_retry(unsigned long timeout)
4541{
d310310c 4542 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4543 timeout <<= 1;
4544 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4545 return NFS4_LOCK_MAXTIMEOUT;
4546 return timeout;
4547}
4548
1da177e4
LT		 4549static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4550{
4551 struct inode *inode = state->inode;
4552 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4553 struct nfs_client *clp = server->nfs_client;
911d1aaf 4554 struct nfs_lockt_args arg = {
1da177e4 4555 .fh = NFS_FH(inode),
911d1aaf 4556 .fl = request,
1da177e4 4557 };
911d1aaf
TM		 4558 struct nfs_lockt_res res = {
4559 .denied = request,
1da177e4
LT		 4560 };
4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4563 .rpc_argp = &arg,
4564 .rpc_resp = &res,
4565 .rpc_cred = state->owner->so_cred,
4566 };
1da177e4
LT		 4567 struct nfs4_lock_state *lsp;
4568 int status;
4569
911d1aaf 4570 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4571 status = nfs4_set_lock_state(state, request);
4572 if (status != 0)
4573 goto out;
4574 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4575 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4576 arg.lock_owner.s_dev = server->s_dev;
7c513058 4577 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4578 switch (status) {
4579 case 0:
4580 request->fl_type = F_UNLCK;
4581 break;
4582 case -NFS4ERR_DENIED:
4583 status = 0;
1da177e4 4584 }
70cc6487 4585 request->fl_ops->fl_release_private(request);
8d0a8a9d 4586out:
1da177e4
LT		 4587 return status;
4588}
4589
4590static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4591{
4592 struct nfs4_exception exception = { };
4593 int err;
4594
4595 do {
4596 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4597 _nfs4_proc_getlk(state, cmd, request),
4598 &exception);
4599 } while (exception.retry);
4600 return err;
4601}
4602
4603static int do_vfs_lock(struct file *file, struct file_lock *fl)
4604{
4605 int res = 0;
4606 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4607 case FL_POSIX:
4608 res = posix_lock_file_wait(file, fl);
4609 break;
4610 case FL_FLOCK:
4611 res = flock_lock_file_wait(file, fl);
4612 break;
4613 default:
4614 BUG();
4615 }
1da177e4
LT		 4616 return res;
4617}
4618
faf5f49c 4619struct nfs4_unlockdata {
911d1aaf
TM		 4620 struct nfs_locku_args arg;
4621 struct nfs_locku_res res;
faf5f49c
TM		 4622 struct nfs4_lock_state *lsp;
4623 struct nfs_open_context *ctx;
911d1aaf
TM		 4624 struct file_lock fl;
4625 const struct nfs_server *server;
26e976a8 4626 unsigned long timestamp;
faf5f49c
TM		 4627};
4628
911d1aaf
TM		 4629static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4630 struct nfs_open_context *ctx,
4631 struct nfs4_lock_state *lsp,
4632 struct nfs_seqid *seqid)
4633{
4634 struct nfs4_unlockdata *p;
4635 struct inode *inode = lsp->ls_state->inode;
4636
8535b2be 4637 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4638 if (p == NULL)
4639 return NULL;
4640 p->arg.fh = NFS_FH(inode);
4641 p->arg.fl = &p->fl;
4642 p->arg.seqid = seqid;
c1d51931 4643 p->res.seqid = seqid;
911d1aaf
TM		 4644 p->arg.stateid = &lsp->ls_stateid;
4645 p->lsp = lsp;
4646 atomic_inc(&lsp->ls_count);
4647 /* Ensure we don't close file until we're done freeing locks! */
4648 p->ctx = get_nfs_open_context(ctx);
4649 memcpy(&p->fl, fl, sizeof(p->fl));
4650 p->server = NFS_SERVER(inode);
4651 return p;
4652}
4653
06f814a3 4654static void nfs4_locku_release_calldata(void *data)
faf5f49c 4655{
963d8fe5 4656 struct nfs4_unlockdata *calldata = data;
911d1aaf 4657 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4658 nfs4_put_lock_state(calldata->lsp);
4659 put_nfs_open_context(calldata->ctx);
4660 kfree(calldata);
faf5f49c
TM		 4661}
4662
963d8fe5 4663static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4664{
963d8fe5 4665 struct nfs4_unlockdata *calldata = data;
faf5f49c 4666
14516c3a
TM		 4667 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4668 return;
faf5f49c
TM		 4669 switch (task->tk_status) {
4670 case 0:
f597c537
TM		 4671 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4672 &calldata->res.stateid);
26e976a8 4673 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4674 break;
9e33bed5
TM		 4675 case -NFS4ERR_BAD_STATEID:
4676 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4677 case -NFS4ERR_STALE_STATEID:
4678 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4679 break;
4680 default:
9e33bed5 4681 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4682 rpc_restart_call_prepare(task);
faf5f49c 4683 }
2b1bc308 4684 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4685}
4686
4ce70ada 4687static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4688{
4ce70ada 4689 struct nfs4_unlockdata *calldata = data;
faf5f49c 4690
911d1aaf 4691 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4692 goto out_wait;
795a88c9 4693 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4694 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4695 goto out_no_action;
faf5f49c 4696 }
26e976a8 4697 calldata->timestamp = jiffies;
035168ab 4698 if (nfs4_setup_sequence(calldata->server,
a893693c 4699 &calldata->arg.seq_args,
2240a9e2
TM		 4700 &calldata->res.seq_res,
4701 task) != 0)
4702 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4703 return;
4704out_no_action:
4705 task->tk_action = NULL;
4706out_wait:
4707 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4708}
4709
963d8fe5 4710static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4711 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4712 .rpc_call_done = nfs4_locku_done,
06f814a3 4713 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4714};
4715
a5d16a4d
TM		 4716static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4717 struct nfs_open_context *ctx,
4718 struct nfs4_lock_state *lsp,
4719 struct nfs_seqid *seqid)
4720{
4721 struct nfs4_unlockdata *data;
5138fde0
TM		 4722 struct rpc_message msg = {
4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4724 .rpc_cred = ctx->cred,
4725 };
c970aa85
TM		 4726 struct rpc_task_setup task_setup_data = {
4727 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4728 .rpc_message = &msg,
c970aa85 4729 .callback_ops = &nfs4_locku_ops,
101070ca 4730 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4731 .flags = RPC_TASK_ASYNC,
4732 };
a5d16a4d 4733
137d6aca
FF		 4734 /* Ensure this is an unlock - when canceling a lock, the
4735 * canceled lock is passed in, and it won't be an unlock.
4736 */
4737 fl->fl_type = F_UNLCK;
4738
a5d16a4d
TM		 4739 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4740 if (data == NULL) {
4741 nfs_free_seqid(seqid);
4742 return ERR_PTR(-ENOMEM);
4743 }
4744
9d12b216 4745 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4746 msg.rpc_argp = &data->arg;
4747 msg.rpc_resp = &data->res;
c970aa85
TM		 4748 task_setup_data.callback_data = data;
4749 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4750}
4751
faf5f49c
TM		 4752static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4753{
65b62a29
TM		 4754 struct inode *inode = state->inode;
4755 struct nfs4_state_owner *sp = state->owner;
4756 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4757 struct nfs_seqid *seqid;
1da177e4 4758 struct nfs4_lock_state *lsp;
06f814a3
TM		 4759 struct rpc_task *task;
4760 int status = 0;
536ff0f8 4761 unsigned char fl_flags = request->fl_flags;
faf5f49c 4762
8d0a8a9d 4763 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4764 /* Unlock _before_ we do the RPC call */
4765 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4766 /* Exclude nfs_delegation_claim_locks() */
4767 mutex_lock(&sp->so_delegreturn_mutex);
4768 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4769 down_read(&nfsi->rwsem);
4770 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4771 up_read(&nfsi->rwsem);
65b62a29 4772 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4773 goto out;
19e03c57
TM		 4774 }
4775 up_read(&nfsi->rwsem);
65b62a29 4776 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4777 if (status != 0)
9b073574
TM		 4778 goto out;
4779 /* Is this a delegated lock? */
8d0a8a9d 4780 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4781 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4782 goto out;
8535b2be 4783 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4784 status = -ENOMEM;
911d1aaf 4785 if (seqid == NULL)
9b073574 4786 goto out;
cd3758e3 4787 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4788 status = PTR_ERR(task);
4789 if (IS_ERR(task))
9b073574 4790 goto out;
a5d16a4d 4791 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4792 rpc_put_task(task);
9b073574 4793out:
536ff0f8 4794 request->fl_flags = fl_flags;
1da177e4
LT		 4795 return status;
4796}
4797
a5d16a4d
TM		 4798struct nfs4_lockdata {
4799 struct nfs_lock_args arg;
4800 struct nfs_lock_res res;
4801 struct nfs4_lock_state *lsp;
4802 struct nfs_open_context *ctx;
4803 struct file_lock fl;
26e976a8 4804 unsigned long timestamp;
a5d16a4d
TM		 4805 int rpc_status;
4806 int cancelled;
66179efe 4807 struct nfs_server *server;
a5d16a4d
TM		 4808};
4809
4810static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4811 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4812 gfp_t gfp_mask)
1da177e4 4813{
a5d16a4d
TM		 4814 struct nfs4_lockdata *p;
4815 struct inode *inode = lsp->ls_state->inode;
1da177e4 4816 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4817
8535b2be 4818 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4819 if (p == NULL)
4820 return NULL;
4821
4822 p->arg.fh = NFS_FH(inode);
4823 p->arg.fl = &p->fl;
8535b2be 4824 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4825 if (p->arg.open_seqid == NULL)
4826 goto out_free;
8535b2be 4827 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4828 if (p->arg.lock_seqid == NULL)
2f74c0a0 4829 goto out_free_seqid;
a5d16a4d 4830 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4831 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4832 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4833 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4834 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4835 p->lsp = lsp;
66179efe 4836 p->server = server;
a5d16a4d
TM		 4837 atomic_inc(&lsp->ls_count);
4838 p->ctx = get_nfs_open_context(ctx);
4839 memcpy(&p->fl, fl, sizeof(p->fl));
4840 return p;
2f74c0a0
TM		 4841out_free_seqid:
4842 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4843out_free:
4844 kfree(p);
4845 return NULL;
4846}
4847
4848static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4849{
4850 struct nfs4_lockdata *data = calldata;
4851 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4852
3110ff80 4853 dprintk("%s: begin!\n", __func__);
2f74c0a0 4854 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4855 goto out_wait;
a5d16a4d
TM		 4856 /* Do we need to do an open_to_lock_owner? */
4857 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4858 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4859 goto out_release_lock_seqid;
8fe72bac 4860 }
8e472f33 4861 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4862 data->arg.new_lock_owner = 1;
c1d51931 4863 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4864 } else
4865 data->arg.new_lock_owner = 0;
5d422301
TM		 4866 if (!nfs4_valid_open_stateid(state)) {
4867 data->rpc_status = -EBADF;
4868 task->tk_action = NULL;
4869 goto out_release_open_seqid;
4870 }
26e976a8 4871 data->timestamp = jiffies;
035168ab
TM		 4872 if (nfs4_setup_sequence(data->server,
4873 &data->arg.seq_args,
2240a9e2 4874 &data->res.seq_res,
d9afbd1b 4875 task) == 0)
66179efe 4876 return;
5d422301 4877out_release_open_seqid:
2240a9e2
TM		 4878 nfs_release_seqid(data->arg.open_seqid);
4879out_release_lock_seqid:
4880 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4881out_wait:
4882 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4883 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4884}
4885
a5d16a4d
TM		 4886static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4887{
4888 struct nfs4_lockdata *data = calldata;
4889
3110ff80 4890 dprintk("%s: begin!\n", __func__);
a5d16a4d 4891
14516c3a
TM		 4892 if (!nfs4_sequence_done(task, &data->res.seq_res))
4893 return;
66179efe 4894
a5d16a4d 4895 data->rpc_status = task->tk_status;
a5d16a4d 4896 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4897 if (data->rpc_status == 0)
4898 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4899 else
4900 goto out;
4901 }
4902 if (data->rpc_status == 0) {
f597c537 4903 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4904 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4905 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4906 }
a5d16a4d 4907out:
3110ff80 4908 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4909}
4910
4911static void nfs4_lock_release(void *calldata)
4912{
4913 struct nfs4_lockdata *data = calldata;
4914
3110ff80 4915 dprintk("%s: begin!\n", __func__);
2f74c0a0 4916 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4917 if (data->cancelled != 0) {
4918 struct rpc_task *task;
4919 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4920 data->arg.lock_seqid);
4921 if (!IS_ERR(task))
bf294b41 4922 rpc_put_task_async(task);
3110ff80 4923 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4924 } else
4925 nfs_free_seqid(data->arg.lock_seqid);
4926 nfs4_put_lock_state(data->lsp);
4927 put_nfs_open_context(data->ctx);
4928 kfree(data);
3110ff80 4929 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4930}
4931
4932static const struct rpc_call_ops nfs4_lock_ops = {
4933 .rpc_call_prepare = nfs4_lock_prepare,
4934 .rpc_call_done = nfs4_lock_done,
4935 .rpc_release = nfs4_lock_release,
4936};
4937
2bee72a6
TM		 4938static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4939{
2bee72a6
TM		 4940 switch (error) {
4941 case -NFS4ERR_ADMIN_REVOKED:
4942 case -NFS4ERR_BAD_STATEID:
ecac799a 4943 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4944 if (new_lock_owner != 0 ||
795a88c9 4945 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4946 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4947 break;
4948 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4949 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4950 case -NFS4ERR_EXPIRED:
4951 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4952 };
4953}
4954
afe6c27c 4955static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4956{
4957 struct nfs4_lockdata *data;
4958 struct rpc_task *task;
5138fde0
TM		 4959 struct rpc_message msg = {
4960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4961 .rpc_cred = state->owner->so_cred,
4962 };
c970aa85
TM		 4963 struct rpc_task_setup task_setup_data = {
4964 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4965 .rpc_message = &msg,
c970aa85 4966 .callback_ops = &nfs4_lock_ops,
101070ca 4967 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4968 .flags = RPC_TASK_ASYNC,
4969 };
a5d16a4d
TM		 4970 int ret;
4971
3110ff80 4972 dprintk("%s: begin!\n", __func__);
cd3758e3 4973 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4974 fl->fl_u.nfs4_fl.owner,
4975 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4976 if (data == NULL)
4977 return -ENOMEM;
4978 if (IS_SETLKW(cmd))
4979 data->arg.block = 1;
9d12b216 4980 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4981 msg.rpc_argp = &data->arg;
4982 msg.rpc_resp = &data->res;
c970aa85 4983 task_setup_data.callback_data = data;
8fe72bac
TM		 4984 if (recovery_type > NFS_LOCK_NEW) {
4985 if (recovery_type == NFS_LOCK_RECLAIM)
4986 data->arg.reclaim = NFS_LOCK_RECLAIM;
4987 nfs4_set_sequence_privileged(&data->arg.seq_args);
4988 }
c970aa85 4989 task = rpc_run_task(&task_setup_data);
7a1218a2 4990 if (IS_ERR(task))
a5d16a4d 4991 return PTR_ERR(task);
a5d16a4d
TM		 4992 ret = nfs4_wait_for_completion_rpc_task(task);
4993 if (ret == 0) {
4994 ret = data->rpc_status;
2bee72a6
TM		 4995 if (ret)
4996 nfs4_handle_setlk_error(data->server, data->lsp,
4997 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4998 } else
4999 data->cancelled = 1;
e6b3c4db 5000 rpc_put_task(task);
3110ff80 5001 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5002 return ret;
1da177e4
LT		 5003}
5004
5005static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5006{
202b50dc 5007 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5008 struct nfs4_exception exception = {
5009 .inode = state->inode,
5010 };
202b50dc
TM		 5011 int err;
5012
5013 do {
42a2d13e
TM		 5014 /* Cache the lock if possible... */
5015 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5016 return 0;
afe6c27c 5017 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5018 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5019 break;
5020 nfs4_handle_exception(server, err, &exception);
5021 } while (exception.retry);
5022 return err;
1da177e4
LT		 5023}
5024
5025static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5026{
202b50dc 5027 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5028 struct nfs4_exception exception = {
5029 .inode = state->inode,
5030 };
202b50dc
TM		 5031 int err;
5032
6bfc93ef
TM		 5033 err = nfs4_set_lock_state(state, request);
5034 if (err != 0)
5035 return err;
202b50dc 5036 do {
42a2d13e
TM		 5037 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5038 return 0;
afe6c27c 5039 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5040 switch (err) {
5041 default:
5042 goto out;
5043 case -NFS4ERR_GRACE:
5044 case -NFS4ERR_DELAY:
5045 nfs4_handle_exception(server, err, &exception);
5046 err = 0;
5047 }
202b50dc 5048 } while (exception.retry);
a9ed2e25 5049out:
202b50dc 5050 return err;
1da177e4
LT		 5051}
5052
f062eb6c 5053#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5054/**
5055 * nfs41_check_expired_locks - possibly free a lock stateid
5056 *
5057 * @state: NFSv4 state for an inode
5058 *
5059 * Returns NFS_OK if recovery for this stateid is now finished.
5060 * Otherwise a negative NFS4ERR value is returned.
5061 */
b01dd1d8 5062static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5063{
eb64cf96 5064 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5065 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5066 struct nfs_server *server = NFS_SERVER(state->inode);
5067
b01dd1d8 5068 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5069 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5070 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5071
5072 status = nfs41_test_stateid(server,
5073 &lsp->ls_stateid,
5074 cred);
b01dd1d8 5075 if (status != NFS_OK) {
3e60ffdd
CL		 5076 /* Free the stateid unless the server
5077 * informs us the stateid is unrecognized. */
89af2739
CL		 5078 if (status != -NFS4ERR_BAD_STATEID)
5079 nfs41_free_stateid(server,
ab7cb0df
TM		 5080 &lsp->ls_stateid,
5081 cred);
795a88c9 5082 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5083 ret = status;
5084 }
5085 }
5086 };
5087
5088 return ret;
5089}
5090
5091static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5092{
5093 int status = NFS_OK;
5094
5095 if (test_bit(LK_STATE_IN_USE, &state->flags))
5096 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5097 if (status != NFS_OK)
5098 status = nfs4_lock_expired(state, request);
5099 return status;
f062eb6c
BS		 5100}
5101#endif
5102
1da177e4
LT		 5103static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5104{
9a99af49 5105 struct nfs4_state_owner *sp = state->owner;
19e03c57 5106 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5107 unsigned char fl_flags = request->fl_flags;
9a99af49 5108 unsigned int seq;
8e469ebd 5109 int status = -ENOLCK;
1da177e4 5110
8e469ebd
TM		 5111 if ((fl_flags & FL_POSIX) &&
5112 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5113 goto out;
6bfc93ef 5114 /* Is this a delegated open? */
6bfc93ef
TM		 5115 status = nfs4_set_lock_state(state, request);
5116 if (status != 0)
5117 goto out;
01c3b861
TM		 5118 request->fl_flags |= FL_ACCESS;
5119 status = do_vfs_lock(request->fl_file, request);
5120 if (status < 0)
5121 goto out;
19e03c57 5122 down_read(&nfsi->rwsem);
01c3b861 5123 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5124 /* Yes: cache locks! */
01c3b861 5125 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5126 request->fl_flags = fl_flags & ~FL_SLEEP;
5127 status = do_vfs_lock(request->fl_file, request);
5128 goto out_unlock;
01c3b861 5129 }
9a99af49
TM		 5130 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5131 up_read(&nfsi->rwsem);
afe6c27c 5132 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5133 if (status != 0)
9a99af49
TM		 5134 goto out;
5135 down_read(&nfsi->rwsem);
5136 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5137 status = -NFS4ERR_DELAY;
01c3b861 5138 goto out_unlock;
9a99af49 5139 }
6bfc93ef 5140 /* Note: we always want to sleep here! */
01c3b861 5141 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5142 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5143 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5144 "manager!\n", __func__);
01c3b861 5145out_unlock:
19e03c57 5146 up_read(&nfsi->rwsem);
01c3b861
TM		 5147out:
5148 request->fl_flags = fl_flags;
1da177e4
LT		 5149 return status;
5150}
5151
5152static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5153{
a1d0b5ee
TM		 5154 struct nfs4_exception exception = {
5155 .state = state,
05ffe24f 5156 .inode = state->inode,
a1d0b5ee 5157 };
1da177e4
LT		 5158 int err;
5159
5160 do {
965b5d67
TM		 5161 err = _nfs4_proc_setlk(state, cmd, request);
5162 if (err == -NFS4ERR_DENIED)
5163 err = -EAGAIN;
1da177e4 5164 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5165 err, &exception);
1da177e4
LT		 5166 } while (exception.retry);
5167 return err;
5168}
5169
5170static int
5171nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5172{
5173 struct nfs_open_context *ctx;
5174 struct nfs4_state *state;
5175 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5176 int status;
5177
5178 /* verify open state */
cd3758e3 5179 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5180 state = ctx->state;
5181
5182 if (request->fl_start < 0 || request->fl_end < 0)
5183 return -EINVAL;
5184
d953126a
TM		 5185 if (IS_GETLK(cmd)) {
5186 if (state != NULL)
5187 return nfs4_proc_getlk(state, F_GETLK, request);
5188 return 0;
5189 }
1da177e4
LT		 5190
5191 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5192 return -EINVAL;
5193
d953126a
TM		 5194 if (request->fl_type == F_UNLCK) {
5195 if (state != NULL)
5196 return nfs4_proc_unlck(state, cmd, request);
5197 return 0;
5198 }
1da177e4 5199
d953126a
TM		 5200 if (state == NULL)
5201 return -ENOLCK;
55725513
TM		 5202 /*
5203 * Don't rely on the VFS having checked the file open mode,
5204 * since it won't do this for flock() locks.
5205 */
f44106e2 5206 switch (request->fl_type) {
55725513
TM		 5207 case F_RDLCK:
5208 if (!(filp->f_mode & FMODE_READ))
5209 return -EBADF;
5210 break;
5211 case F_WRLCK:
5212 if (!(filp->f_mode & FMODE_WRITE))
5213 return -EBADF;
5214 }
5215
1da177e4
LT		 5216 do {
5217 status = nfs4_proc_setlk(state, cmd, request);
5218 if ((status != -EAGAIN) || IS_SETLK(cmd))
5219 break;
5220 timeout = nfs4_set_lock_task_retry(timeout);
5221 status = -ERESTARTSYS;
5222 if (signalled())
5223 break;
5224 } while(status < 0);
1da177e4
LT		 5225 return status;
5226}
5227
db4f2e63 5228int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5229{
5230 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5231 int err;
5232
5233 err = nfs4_set_lock_state(state, fl);
5234 if (err != 0)
db4f2e63 5235 return err;
4a706fa0 5236 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5237 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5238}
6b3b5496 5239
cf470c3e
TM		 5240struct nfs_release_lockowner_data {
5241 struct nfs4_lock_state *lsp;
5ae67c4f 5242 struct nfs_server *server;
cf470c3e
TM		 5243 struct nfs_release_lockowner_args args;
5244};
5245
d3c7b7cc
TM		 5246static void nfs4_release_lockowner_release(void *calldata)
5247{
cf470c3e 5248 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5249 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5250 kfree(calldata);
5251}
5252
17280175 5253static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5254 .rpc_release = nfs4_release_lockowner_release,
5255};
5256
c8b2d0bf 5257static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5258{
cf470c3e 5259 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5260 struct rpc_message msg = {
5261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5262 };
5263
5264 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5265 return -EINVAL;
5266 data = kmalloc(sizeof(*data), GFP_NOFS);
5267 if (!data)
5268 return -ENOMEM;
5269 data->lsp = lsp;
5ae67c4f 5270 data->server = server;
cf470c3e
TM		 5271 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5272 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5273 data->args.lock_owner.s_dev = server->s_dev;
5274 msg.rpc_argp = &data->args;
5275 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5276 return 0;
d3c7b7cc
TM		 5277}
5278
aa1870af
BF		 5279#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5280
64c2ce8b
AK		 5281static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5282 const void *buf, size_t buflen,
5283 int flags, int type)
6b3b5496 5284{
64c2ce8b
AK		 5285 if (strcmp(key, "") != 0)
5286 return -EINVAL;
4b580ee3 5287
64c2ce8b 5288 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5289}
5290
64c2ce8b
AK		 5291static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5292 void *buf, size_t buflen, int type)
6b3b5496 5293{
64c2ce8b
AK		 5294 if (strcmp(key, "") != 0)
5295 return -EINVAL;
aa1870af 5296
64c2ce8b 5297 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5298}
5299
64c2ce8b
AK		 5300static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5301 size_t list_len, const char *name,
5302 size_t name_len, int type)
6b3b5496 5303{
64c2ce8b 5304 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5305
096455a2
BF		 5306 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5307 return 0;
64c2ce8b
AK		 5308
5309 if (list && len <= list_len)
5310 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5311 return len;
6b3b5496
BF		 5312}
5313
533eb461
AA		 5314/*
5315 * nfs_fhget will use either the mounted_on_fileid or the fileid
5316 */
69aaaae1
TM		 5317static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5318{
533eb461
AA		 5319 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5320 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5321 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5322 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5323 return;
5324
5325 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5326 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5327 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5328 fattr->nlink = 2;
5329}
5330
f05d147f
BS		 5331static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5332 const struct qstr *name,
5333 struct nfs4_fs_locations *fs_locations,
5334 struct page *page)
683b57b4
TM		 5335{
5336 struct nfs_server *server = NFS_SERVER(dir);
5337 u32 bitmask[2] = {
361e624f 5338 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5339 };
5340 struct nfs4_fs_locations_arg args = {
5341 .dir_fh = NFS_FH(dir),
c228fd3a 5342 .name = name,
683b57b4
TM		 5343 .page = page,
5344 .bitmask = bitmask,
5345 };
22958463
BH		 5346 struct nfs4_fs_locations_res res = {
5347 .fs_locations = fs_locations,
5348 };
683b57b4
TM		 5349 struct rpc_message msg = {
5350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5351 .rpc_argp = &args,
22958463 5352 .rpc_resp = &res,
683b57b4
TM		 5353 };
5354 int status;
5355
3110ff80 5356 dprintk("%s: start\n", __func__);
533eb461
AA		 5357
5358 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5359 * is not supported */
5360 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5361 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5362 else
5363 bitmask[0] |= FATTR4_WORD0_FILEID;
5364
c228fd3a 5365 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5366 fs_locations->server = server;
830b8e33 5367 fs_locations->nlocations = 0;
f05d147f 5368 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5369 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5370 return status;
5371}
5372
f05d147f
BS		 5373int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5374 const struct qstr *name,
5375 struct nfs4_fs_locations *fs_locations,
5376 struct page *page)
db0a9593
BS		 5377{
5378 struct nfs4_exception exception = { };
5379 int err;
5380 do {
5381 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5382 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5383 &exception);
5384 } while (exception.retry);
5385 return err;
5386}
5387
5a5ea0d4
BS		 5388static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5389{
5390 int status;
5391 struct nfs4_secinfo_arg args = {
5392 .dir_fh = NFS_FH(dir),
5393 .name = name,
5394 };
5395 struct nfs4_secinfo_res res = {
5396 .flavors = flavors,
5397 };
5398 struct rpc_message msg = {
5399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5400 .rpc_argp = &args,
5401 .rpc_resp = &res,
5402 };
5403
5404 dprintk("NFS call secinfo %s\n", name->name);
5405 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5406 dprintk("NFS reply secinfo: %d\n", status);
5407 return status;
5408}
5409
72de53ec
BS		 5410int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5411 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5412{
5413 struct nfs4_exception exception = { };
5414 int err;
5415 do {
5416 err = nfs4_handle_exception(NFS_SERVER(dir),
5417 _nfs4_proc_secinfo(dir, name, flavors),
5418 &exception);
5419 } while (exception.retry);
5420 return err;
5421}
5422
557134a3 5423#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5424/*
5425 * Check the exchange flags returned by the server for invalid flags, having
5426 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5427 * DS flags set.
5428 */
5429static int nfs4_check_cl_exchange_flags(u32 flags)
5430{
5431 if (flags & ~EXCHGID4_FLAG_MASK_R)
5432 goto out_inval;
5433 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5434 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5435 goto out_inval;
5436 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5437 goto out_inval;
5438 return NFS_OK;
5439out_inval:
5440 return -NFS4ERR_INVAL;
5441}
5442
78fe0f41 5443static bool
79d4e1f0
CL		 5444nfs41_same_server_scope(struct nfs41_server_scope *a,
5445 struct nfs41_server_scope *b)
78fe0f41
WAA		 5446{
5447 if (a->server_scope_sz == b->server_scope_sz &&
5448 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5449 return true;
5450
5451 return false;
5452}
5453
7c44f1ae
WAA		 5454/*
5455 * nfs4_proc_bind_conn_to_session()
5456 *
5457 * The 4.1 client currently uses the same TCP connection for the
5458 * fore and backchannel.
5459 */
2cf047c9 5460int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5461{
5462 int status;
5463 struct nfs41_bind_conn_to_session_res res;
5464 struct rpc_message msg = {
5465 .rpc_proc =
5466 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5467 .rpc_argp = clp,
5468 .rpc_resp = &res,
2cf047c9 5469 .rpc_cred = cred,
7c44f1ae
WAA		 5470 };
5471
5472 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5473
5474 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5475 if (unlikely(res.session == NULL)) {
5476 status = -ENOMEM;
5477 goto out;
5478 }
5479
5480 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5481 if (status == 0) {
5482 if (memcmp(res.session->sess_id.data,
5483 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5484 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5485 status = -EIO;
5486 goto out_session;
5487 }
5488 if (res.dir != NFS4_CDFS4_BOTH) {
5489 dprintk("NFS: %s: Unexpected direction from server\n",
5490 __func__);
5491 status = -EIO;
5492 goto out_session;
5493 }
5494 if (res.use_conn_in_rdma_mode) {
5495 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5496 __func__);
5497 status = -EIO;
5498 goto out_session;
5499 }
5500 }
5501out_session:
5502 kfree(res.session);
5503out:
5504 dprintk("<-- %s status= %d\n", __func__, status);
5505 return status;
5506}
5507
99fe60d0
BH		 5508/*
5509 * nfs4_proc_exchange_id()
5510 *
6bbb4ae8
CL		 5511 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5512 *
99fe60d0
BH		 5513 * Since the clientid has expired, all compounds using sessions
5514 * associated with the stale clientid will be returning
5515 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5516 * be in some phase of session reset.
5517 */
4d643d1d 5518int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5519{
5520 nfs4_verifier verifier;
5521 struct nfs41_exchange_id_args args = {
cd93710e 5522 .verifier = &verifier,
99fe60d0 5523 .client = clp,
4f0b429d
TM		 5524 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5525 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5526 };
5527 struct nfs41_exchange_id_res res = {
32b01310 5528 0
99fe60d0
BH		 5529 };
5530 int status;
5531 struct rpc_message msg = {
5532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5533 .rpc_argp = &args,
5534 .rpc_resp = &res,
5535 .rpc_cred = cred,
5536 };
99fe60d0 5537
f092075d 5538 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5539 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5540 sizeof(args.id));
6bbb4ae8
CL		 5541 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5542 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5543 args.id_len, args.id);
99fe60d0 5544
acdeb69d 5545 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5546 GFP_NOFS);
acdeb69d 5547 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5548 status = -ENOMEM;
5549 goto out;
5550 }
78fe0f41 5551
79d4e1f0 5552 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5553 GFP_NOFS);
177313f1 5554 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5555 status = -ENOMEM;
acdeb69d 5556 goto out_server_owner;
abe9a6d5 5557 }
78fe0f41 5558
bbafffd2 5559 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5560 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5561 status = -ENOMEM;
5562 goto out_server_scope;
5563 }
5564
1bd714f2 5565 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5566 if (status == 0)
32b01310 5567 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5568
acdeb69d 5569 if (status == 0) {
32b01310
TM		 5570 clp->cl_clientid = res.clientid;
5571 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5572 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5573 clp->cl_seqid = res.seqid;
5574
acdeb69d
CL		 5575 kfree(clp->cl_serverowner);
5576 clp->cl_serverowner = res.server_owner;
5577 res.server_owner = NULL;
78fe0f41 5578
7d2ed9ac 5579 /* use the most recent implementation id */
59155546
CL		 5580 kfree(clp->cl_implid);
5581 clp->cl_implid = res.impl_id;
7d2ed9ac 5582
177313f1 5583 if (clp->cl_serverscope != NULL &&
79d4e1f0 5584 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5585 res.server_scope)) {
5586 dprintk("%s: server_scope mismatch detected\n",
5587 __func__);
5588 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5589 kfree(clp->cl_serverscope);
5590 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5591 }
5592
177313f1 5593 if (clp->cl_serverscope == NULL) {
79d4e1f0 5594 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5595 goto out;
5596 }
32b01310
TM		 5597 } else
5598 kfree(res.impl_id);
7d2ed9ac 5599
acdeb69d
CL		 5600out_server_owner:
5601 kfree(res.server_owner);
7d2ed9ac 5602out_server_scope:
abe9a6d5
WAA		 5603 kfree(res.server_scope);
5604out:
177313f1 5605 if (clp->cl_implid != NULL)
6bbb4ae8 5606 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5607 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5608 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5609 clp->cl_implid->date.seconds,
5610 clp->cl_implid->date.nseconds);
6bbb4ae8 5611 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5612 return status;
5613}
5614
66245539
TM		 5615static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5616 struct rpc_cred *cred)
5617{
5618 struct rpc_message msg = {
5619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5620 .rpc_argp = clp,
5621 .rpc_cred = cred,
5622 };
5623 int status;
5624
5625 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5626 if (status)
02c67525 5627 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5628 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5629 return status;
5630}
5631
5632static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5633 struct rpc_cred *cred)
5634{
5635 unsigned int loop;
5636 int ret;
5637
5638 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5639 ret = _nfs4_proc_destroy_clientid(clp, cred);
5640 switch (ret) {
5641 case -NFS4ERR_DELAY:
5642 case -NFS4ERR_CLIENTID_BUSY:
5643 ssleep(1);
5644 break;
5645 default:
5646 return ret;
5647 }
5648 }
5649 return 0;
5650}
5651
5652int nfs4_destroy_clientid(struct nfs_client *clp)
5653{
5654 struct rpc_cred *cred;
5655 int ret = 0;
5656
5657 if (clp->cl_mvops->minor_version < 1)
5658 goto out;
5659 if (clp->cl_exchange_flags == 0)
5660 goto out;
05f4c350
CL		 5661 if (clp->cl_preserve_clid)
5662 goto out;
66245539
TM		 5663 cred = nfs4_get_exchange_id_cred(clp);
5664 ret = nfs4_proc_destroy_clientid(clp, cred);
5665 if (cred)
5666 put_rpccred(cred);
5667 switch (ret) {
5668 case 0:
5669 case -NFS4ERR_STALE_CLIENTID:
5670 clp->cl_exchange_flags = 0;
5671 }
5672out:
5673 return ret;
5674}
5675
2050f0cc
AA		 5676struct nfs4_get_lease_time_data {
5677 struct nfs4_get_lease_time_args *args;
5678 struct nfs4_get_lease_time_res *res;
5679 struct nfs_client *clp;
5680};
5681
5682static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5683 void *calldata)
5684{
2050f0cc
AA		 5685 struct nfs4_get_lease_time_data *data =
5686 (struct nfs4_get_lease_time_data *)calldata;
5687
5688 dprintk("--> %s\n", __func__);
5689 /* just setup sequence, do not trigger session recovery
5690 since we're invoked within one */
d9afbd1b
TM		 5691 nfs41_setup_sequence(data->clp->cl_session,
5692 &data->args->la_seq_args,
5693 &data->res->lr_seq_res,
5694 task);
2050f0cc
AA		 5695 dprintk("<-- %s\n", __func__);
5696}
5697
5698/*
5699 * Called from nfs4_state_manager thread for session setup, so don't recover
5700 * from sequence operation or clientid errors.
5701 */
5702static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5703{
5704 struct nfs4_get_lease_time_data *data =
5705 (struct nfs4_get_lease_time_data *)calldata;
5706
5707 dprintk("--> %s\n", __func__);
14516c3a
TM		 5708 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5709 return;
2050f0cc
AA		 5710 switch (task->tk_status) {
5711 case -NFS4ERR_DELAY:
5712 case -NFS4ERR_GRACE:
5713 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5714 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5715 task->tk_status = 0;
a8a4ae3a
AA		 5716 /* fall through */
5717 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5718 rpc_restart_call_prepare(task);
2050f0cc
AA		 5719 return;
5720 }
2050f0cc
AA		 5721 dprintk("<-- %s\n", __func__);
5722}
5723
17280175 5724static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5725 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5726 .rpc_call_done = nfs4_get_lease_time_done,
5727};
5728
5729int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5730{
5731 struct rpc_task *task;
5732 struct nfs4_get_lease_time_args args;
5733 struct nfs4_get_lease_time_res res = {
5734 .lr_fsinfo = fsinfo,
5735 };
5736 struct nfs4_get_lease_time_data data = {
5737 .args = &args,
5738 .res = &res,
5739 .clp = clp,
5740 };
5741 struct rpc_message msg = {
5742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5743 .rpc_argp = &args,
5744 .rpc_resp = &res,
5745 };
5746 struct rpc_task_setup task_setup = {
5747 .rpc_client = clp->cl_rpcclient,
5748 .rpc_message = &msg,
5749 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5750 .callback_data = &data,
5751 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5752 };
5753 int status;
5754
9d12b216 5755 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5756 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5757 dprintk("--> %s\n", __func__);
5758 task = rpc_run_task(&task_setup);
5759
5760 if (IS_ERR(task))
5761 status = PTR_ERR(task);
5762 else {
5763 status = task->tk_status;
5764 rpc_put_task(task);
5765 }
5766 dprintk("<-- %s return %d\n", __func__, status);
5767
5768 return status;
5769}
5770
fc931582
AA		 5771/*
5772 * Initialize the values to be used by the client in CREATE_SESSION
5773 * If nfs4_init_session set the fore channel request and response sizes,
5774 * use them.
5775 *
5776 * Set the back channel max_resp_sz_cached to zero to force the client to
5777 * always set csa_cachethis to FALSE because the current implementation
5778 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5779 */
5780static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5781{
5782 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5783 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5784 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5785
5786 if (mxrqst_sz == 0)
5787 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5788 if (mxresp_sz == 0)
5789 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5790 /* Fore channel attributes */
fc931582
AA		 5791 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5792 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5793 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5794 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5795
5796 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5797 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5798 __func__,
5799 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5800 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5801
5802 /* Back channel attributes */
fc931582
AA		 5803 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5804 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5805 args->bc_attrs.max_resp_sz_cached = 0;
5806 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5807 args->bc_attrs.max_reqs = 1;
5808
5809 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5810 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5811 __func__,
5812 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5813 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5814 args->bc_attrs.max_reqs);
5815}
5816
43c2e885 5817static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5818{
43c2e885
BF		 5819 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5820 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5821
43c2e885
BF		 5822 if (rcvd->max_resp_sz > sent->max_resp_sz)
5823 return -EINVAL;
5824 /*
5825 * Our requested max_ops is the minimum we need; we're not
5826 * prepared to break up compounds into smaller pieces than that.
5827 * So, no point even trying to continue if the server won't
5828 * cooperate:
5829 */
5830 if (rcvd->max_ops < sent->max_ops)
5831 return -EINVAL;
5832 if (rcvd->max_reqs == 0)
5833 return -EINVAL;
b4b9a0c1
VG		 5834 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5835 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5836 return 0;
8d35301d
AA		 5837}
5838
43c2e885
BF		 5839static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5840{
5841 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5842 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5843
43c2e885
BF		 5844 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5845 return -EINVAL;
5846 if (rcvd->max_resp_sz < sent->max_resp_sz)
5847 return -EINVAL;
5848 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5849 return -EINVAL;
5850 /* These would render the backchannel useless: */
b4b9a0c1 5851 if (rcvd->max_ops != sent->max_ops)
43c2e885 5852 return -EINVAL;
b4b9a0c1 5853 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5854 return -EINVAL;
5855 return 0;
5856}
8d35301d 5857
8d35301d
AA		 5858static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5859 struct nfs4_session *session)
5860{
43c2e885 5861 int ret;
8d35301d 5862
43c2e885
BF		 5863 ret = nfs4_verify_fore_channel_attrs(args, session);
5864 if (ret)
5865 return ret;
5866 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5867}
5868
848f5bda
TM		 5869static int _nfs4_proc_create_session(struct nfs_client *clp,
5870 struct rpc_cred *cred)
fc931582
AA		 5871{
5872 struct nfs4_session *session = clp->cl_session;
5873 struct nfs41_create_session_args args = {
5874 .client = clp,
5875 .cb_program = NFS4_CALLBACK,
5876 };
5877 struct nfs41_create_session_res res = {
5878 .client = clp,
5879 };
5880 struct rpc_message msg = {
5881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5882 .rpc_argp = &args,
5883 .rpc_resp = &res,
848f5bda 5884 .rpc_cred = cred,
fc931582
AA		 5885 };
5886 int status;
5887
5888 nfs4_init_channel_attrs(&args);
0f91421e 5889 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5890
1bd714f2 5891 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5892
43095d39 5893 if (!status) {
8d35301d
AA		 5894 /* Verify the session's negotiated channel_attrs values */
5895 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5896 /* Increment the clientid slot sequence id */
5897 clp->cl_seqid++;
5898 }
5899
5900 return status;
5901}
5902
5903/*
5904 * Issues a CREATE_SESSION operation to the server.
5905 * It is the responsibility of the caller to verify the session is
5906 * expired before calling this routine.
5907 */
848f5bda 5908int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5909{
5910 int status;
5911 unsigned *ptr;
fc931582
AA		 5912 struct nfs4_session *session = clp->cl_session;
5913
5914 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5915
848f5bda 5916 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5917 if (status)
5918 goto out;
5919
aacd5537
AA		 5920 /* Init or reset the session slot tables */
5921 status = nfs4_setup_session_slot_tables(session);
5922 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5923 if (status)
5924 goto out;
5925
5926 ptr = (unsigned *)&session->sess_id.data[0];
5927 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5928 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5929out:
5930 dprintk("<-- %s\n", __func__);
5931 return status;
5932}
5933
0f3e66c6
AA		 5934/*
5935 * Issue the over-the-wire RPC DESTROY_SESSION.
5936 * The caller must serialize access to this routine.
5937 */
848f5bda
TM		 5938int nfs4_proc_destroy_session(struct nfs4_session *session,
5939 struct rpc_cred *cred)
0f3e66c6 5940{
848f5bda
TM		 5941 struct rpc_message msg = {
5942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5943 .rpc_argp = session,
5944 .rpc_cred = cred,
5945 };
0f3e66c6 5946 int status = 0;
0f3e66c6
AA		 5947
5948 dprintk("--> nfs4_proc_destroy_session\n");
5949
5950 /* session is still being setup */
5951 if (session->clp->cl_cons_state != NFS_CS_READY)
5952 return status;
5953
1bd714f2 5954 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5955
5956 if (status)
08106ac7 5957 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5958 "Session has been destroyed regardless...\n", status);
5959
5960 dprintk("<-- nfs4_proc_destroy_session\n");
5961 return status;
5962}
5963
fc01cea9
AA		 5964/*
5965 * Renew the cl_session lease.
5966 */
d5f8d3fe
TM		 5967struct nfs4_sequence_data {
5968 struct nfs_client *clp;
5969 struct nfs4_sequence_args args;
5970 struct nfs4_sequence_res res;
5971};
5972
dc96aef9
AB		 5973static void nfs41_sequence_release(void *data)
5974{
d5f8d3fe
TM		 5975 struct nfs4_sequence_data *calldata = data;
5976 struct nfs_client *clp = calldata->clp;
dc96aef9 5977
7135840f
AB		 5978 if (atomic_read(&clp->cl_count) > 1)
5979 nfs4_schedule_state_renewal(clp);
5980 nfs_put_client(clp);
d5f8d3fe 5981 kfree(calldata);
dc96aef9
AB		 5982}
5983
aa5190d0
TM		 5984static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5985{
5986 switch(task->tk_status) {
5987 case -NFS4ERR_DELAY:
aa5190d0
TM		 5988 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5989 return -EAGAIN;
5990 default:
0400a6b0 5991 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5992 }
5993 return 0;
5994}
5995
dc96aef9 5996static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5997{
d5f8d3fe
TM		 5998 struct nfs4_sequence_data *calldata = data;
5999 struct nfs_client *clp = calldata->clp;
fc01cea9 6000
14516c3a
TM		 6001 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6002 return;
fc01cea9
AA		 6003
6004 if (task->tk_status < 0) {
6005 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6006 if (atomic_read(&clp->cl_count) == 1)
6007 goto out;
fc01cea9 6008
aa5190d0
TM		 6009 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6010 rpc_restart_call_prepare(task);
fc01cea9
AA		 6011 return;
6012 }
6013 }
fc01cea9 6014 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6015out:
fc01cea9
AA		 6016 dprintk("<-- %s\n", __func__);
6017}
6018
6019static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6020{
d5f8d3fe
TM		 6021 struct nfs4_sequence_data *calldata = data;
6022 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6023 struct nfs4_sequence_args *args;
6024 struct nfs4_sequence_res *res;
6025
fc01cea9
AA		 6026 args = task->tk_msg.rpc_argp;
6027 res = task->tk_msg.rpc_resp;
6028
d9afbd1b 6029 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6030}
6031
6032static const struct rpc_call_ops nfs41_sequence_ops = {
6033 .rpc_call_done = nfs41_sequence_call_done,
6034 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6035 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6036};
6037
8fe72bac
TM		 6038static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6039 struct rpc_cred *cred,
6040 bool is_privileged)
fc01cea9 6041{
d5f8d3fe 6042 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6043 struct rpc_message msg = {
6044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6045 .rpc_cred = cred,
6046 };
71ac6da9
TM		 6047 struct rpc_task_setup task_setup_data = {
6048 .rpc_client = clp->cl_rpcclient,
6049 .rpc_message = &msg,
8fe72bac 6050 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6051 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6052 };
fc01cea9 6053
7135840f 6054 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6055 return ERR_PTR(-EIO);
dfb4f309 6056 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6057 if (calldata == NULL) {
7135840f 6058 nfs_put_client(clp);
71ac6da9 6059 return ERR_PTR(-ENOMEM);
fc01cea9 6060 }
9d12b216 6061 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6062 if (is_privileged)
6063 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6064 msg.rpc_argp = &calldata->args;
6065 msg.rpc_resp = &calldata->res;
6066 calldata->clp = clp;
71ac6da9 6067 task_setup_data.callback_data = calldata;
fc01cea9 6068
71ac6da9
TM		 6069 return rpc_run_task(&task_setup_data);
6070}
6071
2f60ea6b 6072static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6073{
6074 struct rpc_task *task;
6075 int ret = 0;
6076
2f60ea6b
TM		 6077 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6078 return 0;
8fe72bac 6079 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6080 if (IS_ERR(task))
6081 ret = PTR_ERR(task);
6082 else
bf294b41 6083 rpc_put_task_async(task);
71ac6da9
TM		 6084 dprintk("<-- %s status=%d\n", __func__, ret);
6085 return ret;
6086}
6087
6088static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6089{
6090 struct rpc_task *task;
6091 int ret;
6092
8fe72bac 6093 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6094 if (IS_ERR(task)) {
6095 ret = PTR_ERR(task);
6096 goto out;
6097 }
6098 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6099 if (!ret) {
6100 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6101
6102 if (task->tk_status == 0)
6103 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6104 ret = task->tk_status;
b4410c2f 6105 }
71ac6da9
TM		 6106 rpc_put_task(task);
6107out:
6108 dprintk("<-- %s status=%d\n", __func__, ret);
6109 return ret;
fc01cea9
AA		 6110}
6111
fce5c838
RL		 6112struct nfs4_reclaim_complete_data {
6113 struct nfs_client *clp;
6114 struct nfs41_reclaim_complete_args arg;
6115 struct nfs41_reclaim_complete_res res;
6116};
6117
6118static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6119{
6120 struct nfs4_reclaim_complete_data *calldata = data;
6121
d9afbd1b
TM		 6122 nfs41_setup_sequence(calldata->clp->cl_session,
6123 &calldata->arg.seq_args,
6124 &calldata->res.seq_res,
6125 task);
fce5c838
RL		 6126}
6127
aa5190d0
TM		 6128static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6129{
6130 switch(task->tk_status) {
6131 case 0:
6132 case -NFS4ERR_COMPLETE_ALREADY:
6133 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6134 break;
6135 case -NFS4ERR_DELAY:
aa5190d0 6136 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6137 /* fall through */
6138 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6139 return -EAGAIN;
6140 default:
0400a6b0 6141 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6142 }
6143 return 0;
6144}
6145
fce5c838
RL		 6146static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6147{
6148 struct nfs4_reclaim_complete_data *calldata = data;
6149 struct nfs_client *clp = calldata->clp;
6150 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6151
6152 dprintk("--> %s\n", __func__);
14516c3a
TM		 6153 if (!nfs41_sequence_done(task, res))
6154 return;
fce5c838 6155
aa5190d0
TM		 6156 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6157 rpc_restart_call_prepare(task);
6158 return;
6159 }
fce5c838
RL		 6160 dprintk("<-- %s\n", __func__);
6161}
6162
6163static void nfs4_free_reclaim_complete_data(void *data)
6164{
6165 struct nfs4_reclaim_complete_data *calldata = data;
6166
6167 kfree(calldata);
6168}
6169
6170static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6171 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6172 .rpc_call_done = nfs4_reclaim_complete_done,
6173 .rpc_release = nfs4_free_reclaim_complete_data,
6174};
6175
6176/*
6177 * Issue a global reclaim complete.
6178 */
965e9c23
TM		 6179static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6180 struct rpc_cred *cred)
fce5c838
RL		 6181{
6182 struct nfs4_reclaim_complete_data *calldata;
6183 struct rpc_task *task;
6184 struct rpc_message msg = {
6185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6186 .rpc_cred = cred,
fce5c838
RL		 6187 };
6188 struct rpc_task_setup task_setup_data = {
6189 .rpc_client = clp->cl_rpcclient,
6190 .rpc_message = &msg,
6191 .callback_ops = &nfs4_reclaim_complete_call_ops,
6192 .flags = RPC_TASK_ASYNC,
6193 };
6194 int status = -ENOMEM;
6195
6196 dprintk("--> %s\n", __func__);
8535b2be 6197 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6198 if (calldata == NULL)
6199 goto out;
6200 calldata->clp = clp;
6201 calldata->arg.one_fs = 0;
fce5c838 6202
9d12b216 6203 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6204 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6205 msg.rpc_argp = &calldata->arg;
6206 msg.rpc_resp = &calldata->res;
6207 task_setup_data.callback_data = calldata;
6208 task = rpc_run_task(&task_setup_data);
acf82b85 6209 if (IS_ERR(task)) {
fce5c838 6210 status = PTR_ERR(task);
acf82b85
DC		 6211 goto out;
6212 }
c34c32ea
AA		 6213 status = nfs4_wait_for_completion_rpc_task(task);
6214 if (status == 0)
6215 status = task->tk_status;
fce5c838 6216 rpc_put_task(task);
acf82b85 6217 return 0;
fce5c838
RL		 6218out:
6219 dprintk("<-- %s status=%d\n", __func__, status);
6220 return status;
6221}
b1f69b75
AA		 6222
6223static void
6224nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6225{
6226 struct nfs4_layoutget *lgp = calldata;
c31663d4 6227 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6228 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6229
6230 dprintk("--> %s\n", __func__);
c31663d4
FI		 6231 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6232 * right now covering the LAYOUTGET we are about to send.
6233 * However, that is not so catastrophic, and there seems
6234 * to be no way to prevent it completely.
6235 */
6ba7db34 6236 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6237 &lgp->res.seq_res, task))
b1f69b75 6238 return;
cf7d63f1
FI		 6239 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6240 NFS_I(lgp->args.inode)->layout,
6241 lgp->args.ctx->state)) {
6242 rpc_exit(task, NFS4_OK);
cf7d63f1 6243 }
b1f69b75
AA		 6244}
6245
6246static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6247{
6248 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6249 struct inode *inode = lgp->args.inode;
6250 struct nfs_server *server = NFS_SERVER(inode);
6251 struct pnfs_layout_hdr *lo;
6252 struct nfs4_state *state = NULL;
30005121 6253 unsigned long timeo, giveup;
b1f69b75
AA		 6254
6255 dprintk("--> %s\n", __func__);
6256
6ba7db34 6257 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6258 goto out;
b1f69b75
AA		 6259
6260 switch (task->tk_status) {
6261 case 0:
ee314c2a 6262 goto out;
b1f69b75
AA		 6263 case -NFS4ERR_LAYOUTTRYLATER:
6264 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6265 timeo = rpc_get_timeout(task->tk_client);
6266 giveup = lgp->args.timestamp + timeo;
6267 if (time_after(giveup, jiffies))
6268 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6269 break;
6270 case -NFS4ERR_EXPIRED:
6271 case -NFS4ERR_BAD_STATEID:
6272 spin_lock(&inode->i_lock);
6273 lo = NFS_I(inode)->layout;
6274 if (!lo || list_empty(&lo->plh_segs)) {
6275 spin_unlock(&inode->i_lock);
6276 /* If the open stateid was bad, then recover it. */
6277 state = lgp->args.ctx->state;
6278 } else {
6279 LIST_HEAD(head);
6280
6281 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6282 spin_unlock(&inode->i_lock);
6283 /* Mark the bad layout state as invalid, then
6284 * retry using the open stateid. */
6285 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6286 }
6287 }
ee314c2a
TM		 6288 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6289 rpc_restart_call_prepare(task);
6290out:
b1f69b75
AA		 6291 dprintk("<-- %s\n", __func__);
6292}
6293
8554116e
IK		 6294static size_t max_response_pages(struct nfs_server *server)
6295{
6296 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6297 return nfs_page_array_len(0, max_resp_sz);
6298}
6299
6300static void nfs4_free_pages(struct page **pages, size_t size)
6301{
6302 int i;
6303
6304 if (!pages)
6305 return;
6306
6307 for (i = 0; i < size; i++) {
6308 if (!pages[i])
6309 break;
6310 __free_page(pages[i]);
6311 }
6312 kfree(pages);
6313}
6314
6315static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6316{
6317 struct page **pages;
6318 int i;
6319
6320 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6321 if (!pages) {
6322 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6323 return NULL;
6324 }
6325
6326 for (i = 0; i < size; i++) {
6327 pages[i] = alloc_page(gfp_flags);
6328 if (!pages[i]) {
6329 dprintk("%s: failed to allocate page\n", __func__);
6330 nfs4_free_pages(pages, size);
6331 return NULL;
6332 }
6333 }
6334
6335 return pages;
6336}
6337
b1f69b75
AA		 6338static void nfs4_layoutget_release(void *calldata)
6339{
6340 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6341 struct inode *inode = lgp->args.inode;
6342 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6343 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6344
6345 dprintk("--> %s\n", __func__);
8554116e 6346 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6347 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6348 put_nfs_open_context(lgp->args.ctx);
6349 kfree(calldata);
6350 dprintk("<-- %s\n", __func__);
6351}
6352
6353static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6354 .rpc_call_prepare = nfs4_layoutget_prepare,
6355 .rpc_call_done = nfs4_layoutget_done,
6356 .rpc_release = nfs4_layoutget_release,
6357};
6358
a0b0a6e3
TM		 6359struct pnfs_layout_segment *
6360nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6361{
a47970ff
WAA		 6362 struct inode *inode = lgp->args.inode;
6363 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6364 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6365 struct rpc_task *task;
6366 struct rpc_message msg = {
6367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6368 .rpc_argp = &lgp->args,
6369 .rpc_resp = &lgp->res,
6ab59344 6370 .rpc_cred = lgp->cred,
b1f69b75
AA		 6371 };
6372 struct rpc_task_setup task_setup_data = {
6373 .rpc_client = server->client,
6374 .rpc_message = &msg,
6375 .callback_ops = &nfs4_layoutget_call_ops,
6376 .callback_data = lgp,
6377 .flags = RPC_TASK_ASYNC,
6378 };
a0b0a6e3 6379 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6380 int status = 0;
6381
6382 dprintk("--> %s\n", __func__);
6383
8554116e
IK		 6384 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6385 if (!lgp->args.layout.pages) {
6386 nfs4_layoutget_release(lgp);
a0b0a6e3 6387 return ERR_PTR(-ENOMEM);
8554116e
IK		 6388 }
6389 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6390 lgp->args.timestamp = jiffies;
8554116e 6391
35124a09 6392 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6393 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6394 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6395
6396 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6397 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6398
b1f69b75
AA		 6399 task = rpc_run_task(&task_setup_data);
6400 if (IS_ERR(task))
a0b0a6e3 6401 return ERR_CAST(task);
b1f69b75 6402 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6403 if (status == 0)
6404 status = task->tk_status;
085b7a45
WAA		 6405 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6406 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6407 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6408 rpc_put_task(task);
6409 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6410 if (status)
6411 return ERR_PTR(status);
6412 return lseg;
b1f69b75
AA		 6413}
6414
cbe82603
BH		 6415static void
6416nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6417{
6418 struct nfs4_layoutreturn *lrp = calldata;
6419
6420 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6421 nfs41_setup_sequence(lrp->clp->cl_session,
6422 &lrp->args.seq_args,
6423 &lrp->res.seq_res,
6424 task);
cbe82603
BH		 6425}
6426
6427static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6428{
6429 struct nfs4_layoutreturn *lrp = calldata;
6430 struct nfs_server *server;
6431
6432 dprintk("--> %s\n", __func__);
6433
6ba7db34 6434 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6435 return;
6436
6437 server = NFS_SERVER(lrp->args.inode);
6438 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6439 rpc_restart_call_prepare(task);
cbe82603
BH		 6440 return;
6441 }
cbe82603
BH		 6442 dprintk("<-- %s\n", __func__);
6443}
6444
6445static void nfs4_layoutreturn_release(void *calldata)
6446{
6447 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6448 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6449
6450 dprintk("--> %s\n", __func__);
849b286f
TM		 6451 spin_lock(&lo->plh_inode->i_lock);
6452 if (lrp->res.lrs_present)
6453 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6454 lo->plh_block_lgets--;
6455 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6456 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6457 kfree(calldata);
6458 dprintk("<-- %s\n", __func__);
6459}
6460
6461static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6462 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6463 .rpc_call_done = nfs4_layoutreturn_done,
6464 .rpc_release = nfs4_layoutreturn_release,
6465};
6466
6467int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6468{
6469 struct rpc_task *task;
6470 struct rpc_message msg = {
6471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6472 .rpc_argp = &lrp->args,
6473 .rpc_resp = &lrp->res,
9556000d 6474 .rpc_cred = lrp->cred,
cbe82603
BH		 6475 };
6476 struct rpc_task_setup task_setup_data = {
6477 .rpc_client = lrp->clp->cl_rpcclient,
6478 .rpc_message = &msg,
6479 .callback_ops = &nfs4_layoutreturn_call_ops,
6480 .callback_data = lrp,
6481 };
6482 int status;
6483
6484 dprintk("--> %s\n", __func__);
9d12b216 6485 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6486 task = rpc_run_task(&task_setup_data);
6487 if (IS_ERR(task))
6488 return PTR_ERR(task);
6489 status = task->tk_status;
6490 dprintk("<-- %s status=%d\n", __func__, status);
6491 rpc_put_task(task);
6492 return status;
6493}
6494
7f11d8d3
AA		 6495/*
6496 * Retrieve the list of Data Server devices from the MDS.
6497 */
6498static int _nfs4_getdevicelist(struct nfs_server *server,
6499 const struct nfs_fh *fh,
6500 struct pnfs_devicelist *devlist)
6501{
6502 struct nfs4_getdevicelist_args args = {
6503 .fh = fh,
6504 .layoutclass = server->pnfs_curr_ld->id,
6505 };
6506 struct nfs4_getdevicelist_res res = {
6507 .devlist = devlist,
6508 };
6509 struct rpc_message msg = {
6510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6511 .rpc_argp = &args,
6512 .rpc_resp = &res,
6513 };
6514 int status;
6515
6516 dprintk("--> %s\n", __func__);
6517 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6518 &res.seq_res, 0);
6519 dprintk("<-- %s status=%d\n", __func__, status);
6520 return status;
6521}
6522
6523int nfs4_proc_getdevicelist(struct nfs_server *server,
6524 const struct nfs_fh *fh,
6525 struct pnfs_devicelist *devlist)
6526{
6527 struct nfs4_exception exception = { };
6528 int err;
6529
6530 do {
6531 err = nfs4_handle_exception(server,
6532 _nfs4_getdevicelist(server, fh, devlist),
6533 &exception);
6534 } while (exception.retry);
6535
6536 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6537 err, devlist->num_devs);
6538
6539 return err;
6540}
6541EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6542
b1f69b75 6543static int
cd5875fe
TM		 6544_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6545 struct pnfs_device *pdev,
6546 struct rpc_cred *cred)
b1f69b75
AA		 6547{
6548 struct nfs4_getdeviceinfo_args args = {
6549 .pdev = pdev,
6550 };
6551 struct nfs4_getdeviceinfo_res res = {
6552 .pdev = pdev,
6553 };
6554 struct rpc_message msg = {
6555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6556 .rpc_argp = &args,
6557 .rpc_resp = &res,
cd5875fe 6558 .rpc_cred = cred,
b1f69b75
AA		 6559 };
6560 int status;
6561
6562 dprintk("--> %s\n", __func__);
7c513058 6563 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6564 dprintk("<-- %s status=%d\n", __func__, status);
6565
6566 return status;
6567}
6568
cd5875fe
TM		 6569int nfs4_proc_getdeviceinfo(struct nfs_server *server,
6570 struct pnfs_device *pdev,
6571 struct rpc_cred *cred)
b1f69b75
AA		 6572{
6573 struct nfs4_exception exception = { };
6574 int err;
6575
6576 do {
6577 err = nfs4_handle_exception(server,
cd5875fe 6578 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 6579 &exception);
6580 } while (exception.retry);
6581 return err;
6582}
6583EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6584
863a3c6c
AA		 6585static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6586{
6587 struct nfs4_layoutcommit_data *data = calldata;
6588 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6589 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6590
d9afbd1b
TM		 6591 nfs41_setup_sequence(session,
6592 &data->args.seq_args,
6593 &data->res.seq_res,
6594 task);
863a3c6c
AA		 6595}
6596
6597static void
6598nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6599{
6600 struct nfs4_layoutcommit_data *data = calldata;
6601 struct nfs_server *server = NFS_SERVER(data->args.inode);
6602
6ba7db34 6603 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6604 return;
6605
6606 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6607 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6608 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6609 case -NFS4ERR_BADLAYOUT: /* no layout */
6610 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6611 task->tk_status = 0;
e59d27e0
TM		 6612 break;
6613 case 0:
863a3c6c
AA		 6614 nfs_post_op_update_inode_force_wcc(data->args.inode,
6615 data->res.fattr);
e59d27e0
TM		 6616 break;
6617 default:
6618 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6619 rpc_restart_call_prepare(task);
6620 return;
6621 }
6622 }
863a3c6c
AA		 6623}
6624
6625static void nfs4_layoutcommit_release(void *calldata)
6626{
6627 struct nfs4_layoutcommit_data *data = calldata;
6628
db29c089 6629 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6630 put_rpccred(data->cred);
6631 kfree(data);
6632}
6633
6634static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6635 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6636 .rpc_call_done = nfs4_layoutcommit_done,
6637 .rpc_release = nfs4_layoutcommit_release,
6638};
6639
6640int
ef311537 6641nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6642{
6643 struct rpc_message msg = {
6644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6645 .rpc_argp = &data->args,
6646 .rpc_resp = &data->res,
6647 .rpc_cred = data->cred,
6648 };
6649 struct rpc_task_setup task_setup_data = {
6650 .task = &data->task,
6651 .rpc_client = NFS_CLIENT(data->args.inode),
6652 .rpc_message = &msg,
6653 .callback_ops = &nfs4_layoutcommit_ops,
6654 .callback_data = data,
6655 .flags = RPC_TASK_ASYNC,
6656 };
6657 struct rpc_task *task;
6658 int status = 0;
6659
6660 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6661 "lbw: %llu inode %lu\n",
6662 data->task.tk_pid, sync,
6663 data->args.lastbytewritten,
6664 data->args.inode->i_ino);
6665
9d12b216 6666 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6667 task = rpc_run_task(&task_setup_data);
6668 if (IS_ERR(task))
6669 return PTR_ERR(task);
ef311537 6670 if (sync == false)
863a3c6c
AA		 6671 goto out;
6672 status = nfs4_wait_for_completion_rpc_task(task);
6673 if (status != 0)
6674 goto out;
6675 status = task->tk_status;
6676out:
6677 dprintk("%s: status %d\n", __func__, status);
6678 rpc_put_task(task);
6679 return status;
6680}
fca78d6d
BS		 6681
6682static int
6683_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6684 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6685{
6686 struct nfs41_secinfo_no_name_args args = {
6687 .style = SECINFO_STYLE_CURRENT_FH,
6688 };
6689 struct nfs4_secinfo_res res = {
6690 .flavors = flavors,
6691 };
6692 struct rpc_message msg = {
6693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6694 .rpc_argp = &args,
6695 .rpc_resp = &res,
6696 };
6697 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6698}
6699
6700static int
6701nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6702 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6703{
6704 struct nfs4_exception exception = { };
6705 int err;
6706 do {
6707 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6708 switch (err) {
6709 case 0:
6710 case -NFS4ERR_WRONGSEC:
6711 case -NFS4ERR_NOTSUPP:
05e9cfb4 6712 goto out;
fca78d6d
BS		 6713 default:
6714 err = nfs4_handle_exception(server, err, &exception);
6715 }
6716 } while (exception.retry);
05e9cfb4 6717out:
fca78d6d
BS		 6718 return err;
6719}
6720
6721static int
6722nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6723 struct nfs_fsinfo *info)
6724{
6725 int err;
6726 struct page *page;
6727 rpc_authflavor_t flavor;
6728 struct nfs4_secinfo_flavors *flavors;
6729
6730 page = alloc_page(GFP_KERNEL);
6731 if (!page) {
6732 err = -ENOMEM;
6733 goto out;
6734 }
6735
6736 flavors = page_address(page);
6737 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6738
6739 /*
6740 * Fall back on "guess and check" method if
6741 * the server doesn't support SECINFO_NO_NAME
6742 */
6743 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6744 err = nfs4_find_root_sec(server, fhandle, info);
6745 goto out_freepage;
6746 }
6747 if (err)
6748 goto out_freepage;
6749
6750 flavor = nfs_find_best_sec(flavors);
6751 if (err == 0)
6752 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6753
6754out_freepage:
6755 put_page(page);
6756 if (err == -EACCES)
6757 return -EPERM;
6758out:
6759 return err;
6760}
1cab0652 6761
ab7cb0df
TM		 6762static int _nfs41_test_stateid(struct nfs_server *server,
6763 nfs4_stateid *stateid,
6764 struct rpc_cred *cred)
7d974794
BS		 6765{
6766 int status;
6767 struct nfs41_test_stateid_args args = {
1cab0652 6768 .stateid = stateid,
7d974794
BS		 6769 };
6770 struct nfs41_test_stateid_res res;
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6773 .rpc_argp = &args,
6774 .rpc_resp = &res,
ab7cb0df 6775 .rpc_cred = cred,
7d974794 6776 };
1cab0652 6777
38527b15 6778 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6779 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6780 nfs4_set_sequence_privileged(&args.seq_args);
6781 status = nfs4_call_sync_sequence(server->client, server, &msg,
6782 &args.seq_args, &res.seq_res);
38527b15
CL		 6783 if (status != NFS_OK) {
6784 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6785 return status;
38527b15
CL		 6786 }
6787 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6788 return -res.status;
7d974794
BS		 6789}
6790
38527b15
CL		 6791/**
6792 * nfs41_test_stateid - perform a TEST_STATEID operation
6793 *
6794 * @server: server / transport on which to perform the operation
6795 * @stateid: state ID to test
ab7cb0df 6796 * @cred: credential
38527b15
CL		 6797 *
6798 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6799 * Otherwise a negative NFS4ERR value is returned if the operation
6800 * failed or the state ID is not currently valid.
6801 */
ab7cb0df
TM		 6802static int nfs41_test_stateid(struct nfs_server *server,
6803 nfs4_stateid *stateid,
6804 struct rpc_cred *cred)
7d974794
BS		 6805{
6806 struct nfs4_exception exception = { };
6807 int err;
6808 do {
ab7cb0df 6809 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 6810 if (err != -NFS4ERR_DELAY)
6811 break;
6812 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6813 } while (exception.retry);
6814 return err;
6815}
9aeda35f 6816
7c1d5fae
TM		 6817struct nfs_free_stateid_data {
6818 struct nfs_server *server;
6819 struct nfs41_free_stateid_args args;
9aeda35f 6820 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6821};
6822
6823static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6824{
6825 struct nfs_free_stateid_data *data = calldata;
6826 nfs41_setup_sequence(nfs4_get_session(data->server),
6827 &data->args.seq_args,
6828 &data->res.seq_res,
6829 task);
6830}
6831
6832static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6833{
6834 struct nfs_free_stateid_data *data = calldata;
6835
6836 nfs41_sequence_done(task, &data->res.seq_res);
6837
6838 switch (task->tk_status) {
6839 case -NFS4ERR_DELAY:
6840 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6841 rpc_restart_call_prepare(task);
6842 }
6843}
6844
6845static void nfs41_free_stateid_release(void *calldata)
6846{
6847 kfree(calldata);
6848}
6849
6850const struct rpc_call_ops nfs41_free_stateid_ops = {
6851 .rpc_call_prepare = nfs41_free_stateid_prepare,
6852 .rpc_call_done = nfs41_free_stateid_done,
6853 .rpc_release = nfs41_free_stateid_release,
6854};
6855
6856static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6857 nfs4_stateid *stateid,
ab7cb0df 6858 struct rpc_cred *cred,
7c1d5fae
TM		 6859 bool privileged)
6860{
9aeda35f
BS		 6861 struct rpc_message msg = {
6862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 6863 .rpc_cred = cred,
9aeda35f 6864 };
7c1d5fae
TM		 6865 struct rpc_task_setup task_setup = {
6866 .rpc_client = server->client,
6867 .rpc_message = &msg,
6868 .callback_ops = &nfs41_free_stateid_ops,
6869 .flags = RPC_TASK_ASYNC,
6870 };
6871 struct nfs_free_stateid_data *data;
9aeda35f 6872
38527b15 6873 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6874 data = kmalloc(sizeof(*data), GFP_NOFS);
6875 if (!data)
6876 return ERR_PTR(-ENOMEM);
6877 data->server = server;
6878 nfs4_stateid_copy(&data->args.stateid, stateid);
6879
6880 task_setup.callback_data = data;
6881
6882 msg.rpc_argp = &data->args;
6883 msg.rpc_resp = &data->res;
6884 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6885 if (privileged)
6886 nfs4_set_sequence_privileged(&data->args.seq_args);
6887
6888 return rpc_run_task(&task_setup);
9aeda35f
BS		 6889}
6890
38527b15
CL		 6891/**
6892 * nfs41_free_stateid - perform a FREE_STATEID operation
6893 *
6894 * @server: server / transport on which to perform the operation
6895 * @stateid: state ID to release
ab7cb0df 6896 * @cred: credential
38527b15
CL		 6897 *
6898 * Returns NFS_OK if the server freed "stateid". Otherwise a
6899 * negative NFS4ERR value is returned.
6900 */
ab7cb0df
TM		 6901static int nfs41_free_stateid(struct nfs_server *server,
6902 nfs4_stateid *stateid,
6903 struct rpc_cred *cred)
9aeda35f 6904{
7c1d5fae
TM		 6905 struct rpc_task *task;
6906 int ret;
6907
ab7cb0df 6908 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 6909 if (IS_ERR(task))
6910 return PTR_ERR(task);
6911 ret = rpc_wait_for_completion_task(task);
6912 if (!ret)
6913 ret = task->tk_status;
6914 rpc_put_task(task);
6915 return ret;
9aeda35f 6916}
36281caa 6917
c8b2d0bf
TM		 6918static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6919{
6920 struct rpc_task *task;
ab7cb0df 6921 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 6922
ab7cb0df 6923 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 6924 nfs4_free_lock_state(server, lsp);
6925 if (IS_ERR(task))
6926 return PTR_ERR(task);
6927 rpc_put_task(task);
6928 return 0;
6929}
6930
36281caa
TM		 6931static bool nfs41_match_stateid(const nfs4_stateid *s1,
6932 const nfs4_stateid *s2)
6933{
2d2f24ad 6934 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6935 return false;
6936
2d2f24ad 6937 if (s1->seqid == s2->seqid)
36281caa 6938 return true;
2d2f24ad 6939 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6940 return true;
6941
6942 return false;
6943}
6944
557134a3
AA		 6945#endif /* CONFIG_NFS_V4_1 */
6946
36281caa
TM		 6947static bool nfs4_match_stateid(const nfs4_stateid *s1,
6948 const nfs4_stateid *s2)
6949{
f597c537 6950 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6951}
6952
6953
17280175 6954static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6955 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6956 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6957 .recover_open = nfs4_open_reclaim,
6958 .recover_lock = nfs4_lock_reclaim,
591d71cb 6959 .establish_clid = nfs4_init_clientid,
90a16617 6960 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6961 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6962};
6963
591d71cb 6964#if defined(CONFIG_NFS_V4_1)
17280175 6965static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6966 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6967 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6968 .recover_open = nfs4_open_reclaim,
6969 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6970 .establish_clid = nfs41_init_clientid,
b4b82607 6971 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6972 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6973 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6974};
6975#endif /* CONFIG_NFS_V4_1 */
6976
17280175 6977static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6978 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6979 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6980 .recover_open = nfs4_open_expired,
6981 .recover_lock = nfs4_lock_expired,
6982 .establish_clid = nfs4_init_clientid,
90a16617 6983 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6984};
6985
6986#if defined(CONFIG_NFS_V4_1)
17280175 6987static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6988 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6989 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6990 .recover_open = nfs41_open_expired,
6991 .recover_lock = nfs41_lock_expired,
4d643d1d 6992 .establish_clid = nfs41_init_clientid,
b4b82607 6993 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6994};
591d71cb 6995#endif /* CONFIG_NFS_V4_1 */
1da177e4 6996
17280175 6997static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6998 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6999 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7000 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7001};
7002
7003#if defined(CONFIG_NFS_V4_1)
17280175 7004static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7005 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7006 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7007 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7008};
7009#endif
7010
97dc1359
TM		 7011static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7012 .minor_version = 0,
39c6daae
TM		 7013 .init_caps = NFS_CAP_READDIRPLUS
7014 | NFS_CAP_ATOMIC_OPEN
7015 | NFS_CAP_CHANGE_ATTR
7016 | NFS_CAP_POSIX_LOCK,
97dc1359 7017 .call_sync = _nfs4_call_sync,
36281caa 7018 .match_stateid = nfs4_match_stateid,
fca78d6d 7019 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7020 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7021 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7022 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7023 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7024};
7025
7026#if defined(CONFIG_NFS_V4_1)
7027static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7028 .minor_version = 1,
39c6daae
TM		 7029 .init_caps = NFS_CAP_READDIRPLUS
7030 | NFS_CAP_ATOMIC_OPEN
7031 | NFS_CAP_CHANGE_ATTR
3b66486c 7032 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7033 | NFS_CAP_STATEID_NFSV41
7034 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7035 .call_sync = nfs4_call_sync_sequence,
36281caa 7036 .match_stateid = nfs41_match_stateid,
fca78d6d 7037 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7038 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7039 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7040 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7041 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7042};
7043#endif
7044
97dc1359
TM		 7045const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7046 [0] = &nfs_v4_0_minor_ops,
7047#if defined(CONFIG_NFS_V4_1)
7048 [1] = &nfs_v4_1_minor_ops,
7049#endif
7050};
7051
73a79706
BS		 7052const struct inode_operations nfs4_dir_inode_operations = {
7053 .create = nfs_create,
7054 .lookup = nfs_lookup,
7055 .atomic_open = nfs_atomic_open,
7056 .link = nfs_link,
7057 .unlink = nfs_unlink,
7058 .symlink = nfs_symlink,
7059 .mkdir = nfs_mkdir,
7060 .rmdir = nfs_rmdir,
7061 .mknod = nfs_mknod,
7062 .rename = nfs_rename,
7063 .permission = nfs_permission,
7064 .getattr = nfs_getattr,
7065 .setattr = nfs_setattr,
7066 .getxattr = generic_getxattr,
7067 .setxattr = generic_setxattr,
7068 .listxattr = generic_listxattr,
7069 .removexattr = generic_removexattr,
7070};
7071
92e1d5be 7072static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7073 .permission = nfs_permission,
7074 .getattr = nfs_getattr,
7075 .setattr = nfs_setattr,
64c2ce8b
AK		 7076 .getxattr = generic_getxattr,
7077 .setxattr = generic_setxattr,
7078 .listxattr = generic_listxattr,
7079 .removexattr = generic_removexattr,
6b3b5496
BF		 7080};
7081
509de811 7082const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7083 .version = 4, /* protocol version */
7084 .dentry_ops = &nfs4_dentry_operations,
7085 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7086 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7087 .file_ops = &nfs4_file_operations,
1da177e4 7088 .getroot = nfs4_proc_get_root,
281cad46 7089 .submount = nfs4_submount,
ff9099f2 7090 .try_mount = nfs4_try_mount,
1da177e4
LT		 7091 .getattr = nfs4_proc_getattr,
7092 .setattr = nfs4_proc_setattr,
7093 .lookup = nfs4_proc_lookup,
7094 .access = nfs4_proc_access,
7095 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7096 .create = nfs4_proc_create,
7097 .remove = nfs4_proc_remove,
7098 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7099 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7100 .unlink_done = nfs4_proc_unlink_done,
7101 .rename = nfs4_proc_rename,
d3d4152a 7102 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7103 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7104 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7105 .link = nfs4_proc_link,
7106 .symlink = nfs4_proc_symlink,
7107 .mkdir = nfs4_proc_mkdir,
7108 .rmdir = nfs4_proc_remove,
7109 .readdir = nfs4_proc_readdir,
7110 .mknod = nfs4_proc_mknod,
7111 .statfs = nfs4_proc_statfs,
7112 .fsinfo = nfs4_proc_fsinfo,
7113 .pathconf = nfs4_proc_pathconf,
e9326dca 7114 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7115 .decode_dirent = nfs4_decode_dirent,
7116 .read_setup = nfs4_proc_read_setup,
1abb5088 7117 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7118 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7119 .read_done = nfs4_read_done,
1da177e4 7120 .write_setup = nfs4_proc_write_setup,
57208fa7 7121 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7122 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7123 .write_done = nfs4_write_done,
1da177e4 7124 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7125 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7126 .commit_done = nfs4_commit_done,
1da177e4 7127 .lock = nfs4_proc_lock,
e50a1c2e 7128 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7129 .close_context = nfs4_close_context,
2b484297 7130 .open_context = nfs4_atomic_open,
011e2a7f 7131 .have_delegation = nfs4_have_delegation,
57ec14c5 7132 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7133 .alloc_client = nfs4_alloc_client,
45a52a02 7134 .init_client = nfs4_init_client,
cdb7eced 7135 .free_client = nfs4_free_client,
1179acc6
BS		 7136 .create_server = nfs4_create_server,
7137 .clone_server = nfs_clone_server,
1da177e4
LT		 7138};
7139
64c2ce8b
AK		 7140static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7141 .prefix = XATTR_NAME_NFSV4_ACL,
7142 .list = nfs4_xattr_list_nfs4_acl,
7143 .get = nfs4_xattr_get_nfs4_acl,
7144 .set = nfs4_xattr_set_nfs4_acl,
7145};
7146
7147const struct xattr_handler *nfs4_xattr_handlers[] = {
7148 &nfs4_xattr_nfs4_acl_handler,
7149 NULL
7150};
7151
1da177e4
LT		 7152/*
7153 * Local variables:
7154 * c-basic-offset: 8
7155 * End:
7156 */
Linux 6.x block layer and io_uring tree(s)