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nfs: have NFSv3 try server-specified auth flavors in turn
[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,
3efb9722 1963 struct nfs_open_context *ctx)
c21443c2
TM		 1964{
1965 struct nfs4_state_owner *sp = opendata->owner;
1966 struct nfs_server *server = sp->so_server;
275bb307 1967 struct dentry *dentry;
c21443c2
TM		 1968 struct nfs4_state *state;
1969 unsigned int seq;
1970 int ret;
1971
1972 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1973
1974 ret = _nfs4_proc_open(opendata);
1975 if (ret != 0)
1976 goto out;
1977
1978 state = nfs4_opendata_to_nfs4_state(opendata);
1979 ret = PTR_ERR(state);
1980 if (IS_ERR(state))
1981 goto out;
1982 if (server->caps & NFS_CAP_POSIX_LOCK)
1983 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1984
275bb307
TM		 1985 dentry = opendata->dentry;
1986 if (dentry->d_inode == NULL) {
1987 /* FIXME: Is this d_drop() ever needed? */
1988 d_drop(dentry);
1989 dentry = d_add_unique(dentry, igrab(state->inode));
1990 if (dentry == NULL) {
1991 dentry = opendata->dentry;
1992 } else if (dentry != ctx->dentry) {
1993 dput(ctx->dentry);
1994 ctx->dentry = dget(dentry);
1995 }
1996 nfs_set_verifier(dentry,
1997 nfs_save_change_attribute(opendata->dir->d_inode));
1998 }
1999
c21443c2
TM		 2000 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2001 if (ret != 0)
2002 goto out;
2003
3efb9722 2004 ctx->state = state;
c45ffdd2
TM		 2005 if (dentry->d_inode == state->inode) {
2006 nfs_inode_attach_open_context(ctx);
2007 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2008 nfs4_schedule_stateid_recovery(server, state);
2009 }
c21443c2
TM		 2010out:
2011 return ret;
2012}
2013
1da177e4 2014/*
24ac23ab 2015 * Returns a referenced nfs4_state
1da177e4 2016 */
82be417a 2017static int _nfs4_do_open(struct inode *dir,
4197a055 2018 struct nfs_open_context *ctx,
82be417a 2019 int flags,
3efb9722 2020 struct iattr *sattr)
1da177e4
LT		 2021{
2022 struct nfs4_state_owner *sp;
2023 struct nfs4_state *state = NULL;
2024 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2025 struct nfs4_opendata *opendata;
4197a055
TM		 2026 struct dentry *dentry = ctx->dentry;
2027 struct rpc_cred *cred = ctx->cred;
2028 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2029 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2030 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 2031 int status;
1da177e4
LT		 2032
2033 /* Protect against reboot recovery conflicts */
1da177e4 2034 status = -ENOMEM;
d1e284d5
TM		 2035 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2036 if (sp == NULL) {
1da177e4
LT		 2037 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2038 goto out_err;
2039 }
58d9714a
TM		 2040 status = nfs4_recover_expired_lease(server);
2041 if (status != 0)
b4454fe1 2042 goto err_put_state_owner;
82a2c1b7
AV		 2043 if (dentry->d_inode != NULL)
2044 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2045 status = -ENOMEM;
49f9a0fa
TM		 2046 if (dentry->d_inode)
2047 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2048 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2049 claim, GFP_KERNEL);
e56e0b78 2050 if (opendata == NULL)
95d35cb4 2051 goto err_put_state_owner;
1da177e4 2052
82be417a
AA		 2053 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2054 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2055 if (!opendata->f_attr.mdsthreshold)
2056 goto err_opendata_put;
1549210f 2057 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2058 }
82a2c1b7
AV		 2059 if (dentry->d_inode != NULL)
2060 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2061
3efb9722 2062 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c
WAA		 2063 if (status != 0)
2064 goto err_opendata_put;
3efb9722 2065 state = ctx->state;
6168f62c 2066
549b19cc
TM		 2067 if ((opendata->o_arg.open_flags & O_EXCL) &&
2068 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2069 nfs4_exclusive_attrset(opendata, sattr);
2070
2071 nfs_fattr_init(opendata->o_res.f_attr);
2072 status = nfs4_do_setattr(state->inode, cred,
2073 opendata->o_res.f_attr, sattr,
2074 state);
2075 if (status == 0)
2076 nfs_setattr_update_inode(state->inode, sattr);
2077 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2078 }
82be417a
AA		 2079
2080 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2081 *ctx_th = opendata->f_attr.mdsthreshold;
2082 else
2083 kfree(opendata->f_attr.mdsthreshold);
2084 opendata->f_attr.mdsthreshold = NULL;
2085
c6d00e63 2086 nfs4_opendata_put(opendata);
1da177e4 2087 nfs4_put_state_owner(sp);
1da177e4 2088 return 0;
c6d00e63 2089err_opendata_put:
82be417a 2090 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2091 nfs4_opendata_put(opendata);
e56e0b78
TM		 2092err_put_state_owner:
2093 nfs4_put_state_owner(sp);
1da177e4 2094out_err:
1da177e4
LT		 2095 return status;
2096}
2097
2098
82be417a 2099static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2100 struct nfs_open_context *ctx,
82be417a 2101 int flags,
4197a055 2102 struct iattr *sattr)
1da177e4 2103{
49f9a0fa 2104 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2105 struct nfs4_exception exception = { };
2106 struct nfs4_state *res;
2107 int status;
2108
2109 do {
3efb9722
TM		 2110 status = _nfs4_do_open(dir, ctx, flags, sattr);
2111 res = ctx->state;
1da177e4
LT		 2112 if (status == 0)
2113 break;
2114 /* NOTE: BAD_SEQID means the server and client disagree about the
2115 * book-keeping w.r.t. state-changing operations
2116 * (OPEN/CLOSE/LOCK/LOCKU...)
2117 * It is actually a sign of a bug on the client or on the server.
2118 *
2119 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2120 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2121 * have unhashed the old state_owner for us, and that we can
2122 * therefore safely retry using a new one. We should still warn
2123 * the user though...
2124 */
2125 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2126 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2127 " returned a bad sequence-id error!\n",
2128 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2129 exception.retry = 1;
2130 continue;
2131 }
550f5747
TM		 2132 /*
2133 * BAD_STATEID on OPEN means that the server cancelled our
2134 * state before it received the OPEN_CONFIRM.
2135 * Recover by retrying the request as per the discussion
2136 * on Page 181 of RFC3530.
2137 */
2138 if (status == -NFS4ERR_BAD_STATEID) {
2139 exception.retry = 1;
2140 continue;
2141 }
aac00a8d
TM		 2142 if (status == -EAGAIN) {
2143 /* We must have found a delegation */
2144 exception.retry = 1;
2145 continue;
2146 }
49f9a0fa
TM		 2147 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2148 continue;
2149 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2150 status, &exception));
2151 } while (exception.retry);
2152 return res;
2153}
2154
659bfcd6
TM		 2155static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2156 struct nfs_fattr *fattr, struct iattr *sattr,
2157 struct nfs4_state *state)
1da177e4 2158{
3e4f6290 2159 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2160 struct nfs_setattrargs arg = {
3e4f6290 2161 .fh = NFS_FH(inode),
1da177e4
LT		 2162 .iap = sattr,
2163 .server = server,
2164 .bitmask = server->attr_bitmask,
2165 };
2166 struct nfs_setattrres res = {
2167 .fattr = fattr,
2168 .server = server,
2169 };
2170 struct rpc_message msg = {
659bfcd6
TM		 2171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2172 .rpc_argp = &arg,
2173 .rpc_resp = &res,
2174 .rpc_cred = cred,
1da177e4 2175 };
26e976a8 2176 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2177 fmode_t fmode;
2178 bool truncate;
65e4308d 2179 int status;
1da177e4 2180
0e574af1 2181 nfs_fattr_init(fattr);
1da177e4 2182
ee3ae84e
TM		 2183 /* Servers should only apply open mode checks for file size changes */
2184 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2185 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2186
2187 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2188 /* Use that stateid */
2189 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2190 struct nfs_lockowner lockowner = {
2191 .l_owner = current->files,
2192 .l_pid = current->tgid,
2193 };
4fc8796d 2194 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2195 &lockowner);
08e9eac4 2196 } else
f597c537 2197 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2198
7c513058 2199 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2200 if (status == 0 && state != NULL)
2201 renew_lease(server, timestamp);
65e4308d 2202 return status;
1da177e4
LT		 2203}
2204
659bfcd6
TM		 2205static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2206 struct nfs_fattr *fattr, struct iattr *sattr,
2207 struct nfs4_state *state)
1da177e4 2208{
3e4f6290 2209 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2210 struct nfs4_exception exception = {
2211 .state = state,
3114ea7a 2212 .inode = inode,
a1d0b5ee 2213 };
1da177e4
LT		 2214 int err;
2215 do {
451146be
TM		 2216 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2217 switch (err) {
2218 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2219 if (!(sattr->ia_valid & ATTR_SIZE)) {
2220 pr_warn_once("NFSv4: server %s is incorrectly "
2221 "applying open mode checks to "
2222 "a SETATTR that is not "
2223 "changing file size.\n",
2224 server->nfs_client->cl_hostname);
2225 }
451146be
TM		 2226 if (state && !(state->state & FMODE_WRITE)) {
2227 err = -EBADF;
2228 if (sattr->ia_valid & ATTR_OPEN)
2229 err = -EACCES;
2230 goto out;
2231 }
2232 }
2233 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2234 } while (exception.retry);
451146be 2235out:
1da177e4
LT		 2236 return err;
2237}
2238
2239struct nfs4_closedata {
2240 struct inode *inode;
2241 struct nfs4_state *state;
2242 struct nfs_closeargs arg;
2243 struct nfs_closeres res;
516a6af6 2244 struct nfs_fattr fattr;
26e976a8 2245 unsigned long timestamp;
f7e8917a
FI		 2246 bool roc;
2247 u32 roc_barrier;
1da177e4
LT		 2248};
2249
963d8fe5 2250static void nfs4_free_closedata(void *data)
9512135d 2251{
963d8fe5
TM		 2252 struct nfs4_closedata *calldata = data;
2253 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2254 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2255
f7e8917a
FI		 2256 if (calldata->roc)
2257 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2258 nfs4_put_open_state(calldata->state);
2259 nfs_free_seqid(calldata->arg.seqid);
9512135d 2260 nfs4_put_state_owner(sp);
322b2b90 2261 nfs_sb_deactive(sb);
9512135d
TM		 2262 kfree(calldata);
2263}
2264
88069f77
TM		 2265static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2266 fmode_t fmode)
2267{
2268 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2269 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2270 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2271 case FMODE_WRITE:
88069f77 2272 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2273 break;
2274 case FMODE_READ:
88069f77 2275 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2276 break;
2277 case 0:
2278 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2279 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2280 clear_bit(NFS_OPEN_STATE, &state->flags);
2281 }
88069f77
TM		 2282 spin_unlock(&state->owner->so_lock);
2283}
2284
963d8fe5 2285static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2286{
963d8fe5 2287 struct nfs4_closedata *calldata = data;
1da177e4 2288 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2289 struct nfs_server *server = NFS_SERVER(calldata->inode);
2290
a3ca5651 2291 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2292 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2293 return;
1da177e4
LT		 2294 /* hmm. we are done with the inode, and in the process of freeing
2295 * the state_owner. we keep this around to process errors
2296 */
1da177e4
LT		 2297 switch (task->tk_status) {
2298 case 0:
f7e8917a
FI		 2299 if (calldata->roc)
2300 pnfs_roc_set_barrier(state->inode,
2301 calldata->roc_barrier);
45328c35 2302 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2303 renew_lease(server, calldata->timestamp);
88069f77
TM		 2304 nfs4_close_clear_stateid_flags(state,
2305 calldata->arg.fmode);
1da177e4
LT		 2306 break;
2307 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2308 case -NFS4ERR_OLD_STATEID:
2309 case -NFS4ERR_BAD_STATEID:
1da177e4 2310 case -NFS4ERR_EXPIRED:
dc0b027d 2311 if (calldata->arg.fmode == 0)
9e33bed5 2312 break;
1da177e4 2313 default:
72211dbe
TM		 2314 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2315 rpc_restart_call_prepare(task);
1da177e4 2316 }
72211dbe 2317 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2318 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2319 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2320}
2321
4ce70ada 2322static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2323{
4ce70ada 2324 struct nfs4_closedata *calldata = data;
9512135d 2325 struct nfs4_state *state = calldata->state;
7fdab069 2326 struct inode *inode = calldata->inode;
88069f77 2327 int call_close = 0;
9512135d 2328
a3ca5651 2329 dprintk("%s: begin!\n", __func__);
963d8fe5 2330 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2331 goto out_wait;
003707c7 2332
88069f77
TM		 2333 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2334 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2335 spin_lock(&state->owner->so_lock);
003707c7 2336 /* Calculate the change in open mode */
e7616923 2337 if (state->n_rdwr == 0) {
003707c7 2338 if (state->n_rdonly == 0) {
88069f77
TM		 2339 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2340 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2341 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2342 }
2343 if (state->n_wronly == 0) {
88069f77
TM		 2344 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2345 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2346 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2347 }
e7616923 2348 }
5d422301
TM		 2349 if (!nfs4_valid_open_stateid(state))
2350 call_close = 0;
4cecb76f 2351 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2352
2353 if (!call_close) {
963d8fe5 2354 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2355 goto out_no_action;
9512135d 2356 }
88069f77 2357
f7e8917a 2358 if (calldata->arg.fmode == 0) {
88069f77 2359 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2360 if (calldata->roc &&
b9536ad5
AA		 2361 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2362 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2363 goto out_wait;
b9536ad5 2364 }
f7e8917a 2365 }
88069f77 2366
516a6af6 2367 nfs_fattr_init(calldata->res.fattr);
26e976a8 2368 calldata->timestamp = jiffies;
7fdab069 2369 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2370 &calldata->arg.seq_args,
2371 &calldata->res.seq_res,
2240a9e2
TM		 2372 task) != 0)
2373 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2374 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2375 return;
2376out_no_action:
2377 task->tk_action = NULL;
2378out_wait:
2379 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2380}
2381
963d8fe5 2382static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2383 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2384 .rpc_call_done = nfs4_close_done,
2385 .rpc_release = nfs4_free_closedata,
2386};
2387
1da177e4
LT		 2388/*
2389 * It is possible for data to be read/written from a mem-mapped file
2390 * after the sys_close call (which hits the vfs layer as a flush).
2391 * This means that we can't safely call nfsv4 close on a file until
2392 * the inode is cleared. This in turn means that we are not good
2393 * NFSv4 citizens - we do not indicate to the server to update the file's
2394 * share state even when we are done with one of the three share
2395 * stateid's in the inode.
2396 *
2397 * NOTE: Caller must be holding the sp->so_owner semaphore!
2398 */
1f7977c1 2399int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2400{
4a35bd41 2401 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2402 struct nfs4_closedata *calldata;
b39e625b
TM		 2403 struct nfs4_state_owner *sp = state->owner;
2404 struct rpc_task *task;
5138fde0
TM		 2405 struct rpc_message msg = {
2406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2407 .rpc_cred = state->owner->so_cred,
2408 };
c970aa85
TM		 2409 struct rpc_task_setup task_setup_data = {
2410 .rpc_client = server->client,
5138fde0 2411 .rpc_message = &msg,
c970aa85 2412 .callback_ops = &nfs4_close_ops,
101070ca 2413 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2414 .flags = RPC_TASK_ASYNC,
2415 };
9512135d 2416 int status = -ENOMEM;
1da177e4 2417
8535b2be 2418 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2419 if (calldata == NULL)
9512135d 2420 goto out;
9d12b216 2421 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2422 calldata->inode = state->inode;
1da177e4 2423 calldata->state = state;
4a35bd41 2424 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2425 calldata->arg.stateid = &state->open_stateid;
1da177e4 2426 /* Serialization for the sequence id */
8535b2be 2427 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2428 if (calldata->arg.seqid == NULL)
2429 goto out_free_calldata;
dc0b027d 2430 calldata->arg.fmode = 0;
a65318bf 2431 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2432 calldata->res.fattr = &calldata->fattr;
c1d51931 2433 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2434 calldata->res.server = server;
1f7977c1 2435 calldata->roc = pnfs_roc(state->inode);
643168c2 2436 nfs_sb_active(calldata->inode->i_sb);
9512135d 2437
1174dd1f
TM		 2438 msg.rpc_argp = &calldata->arg;
2439 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2440 task_setup_data.callback_data = calldata;
2441 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2442 if (IS_ERR(task))
2443 return PTR_ERR(task);
a49c3c77
TM		 2444 status = 0;
2445 if (wait)
2446 status = rpc_wait_for_completion_task(task);
b39e625b 2447 rpc_put_task(task);
a49c3c77 2448 return status;
9512135d
TM		 2449out_free_calldata:
2450 kfree(calldata);
2451out:
b39e625b
TM		 2452 nfs4_put_open_state(state);
2453 nfs4_put_state_owner(sp);
9512135d 2454 return status;
1da177e4
LT		 2455}
2456
2b484297 2457static struct inode *
cd9a1c0e 2458nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2459{
1da177e4 2460 struct nfs4_state *state;
1da177e4 2461
565277f6 2462 /* Protect against concurrent sillydeletes */
4197a055 2463 state = nfs4_do_open(dir, ctx, open_flags, attr);
f46e0bd3
TM		 2464 if (IS_ERR(state))
2465 return ERR_CAST(state);
275bb307 2466 return state->inode;
1da177e4
LT		 2467}
2468
1185a552 2469static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2470{
2471 if (ctx->state == NULL)
2472 return;
2473 if (is_sync)
643168c2 2474 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2475 else
643168c2 2476 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2477}
1da177e4
LT		 2478
2479static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2480{
43652ad5
BH		 2481 struct nfs4_server_caps_arg args = {
2482 .fhandle = fhandle,
2483 };
1da177e4
LT		 2484 struct nfs4_server_caps_res res = {};
2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2487 .rpc_argp = &args,
1da177e4
LT		 2488 .rpc_resp = &res,
2489 };
2490 int status;
2491
7c513058 2492 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2493 if (status == 0) {
2494 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2495 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2496 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2497 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2498 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2499 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2500 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2501 server->caps |= NFS_CAP_ACLS;
2502 if (res.has_links != 0)
2503 server->caps |= NFS_CAP_HARDLINKS;
2504 if (res.has_symlinks != 0)
2505 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2506 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2507 server->caps |= NFS_CAP_FILEID;
2508 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2509 server->caps |= NFS_CAP_MODE;
2510 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2511 server->caps |= NFS_CAP_NLINK;
2512 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2513 server->caps |= NFS_CAP_OWNER;
2514 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2515 server->caps |= NFS_CAP_OWNER_GROUP;
2516 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2517 server->caps |= NFS_CAP_ATIME;
2518 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2519 server->caps |= NFS_CAP_CTIME;
2520 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2521 server->caps |= NFS_CAP_MTIME;
2522
a65318bf
TM		 2523 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2524 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2525 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2526 server->acl_bitmask = res.acl_bitmask;
264e6351 2527 server->fh_expire_type = res.fh_expire_type;
1da177e4 2528 }
cccef3b9 2529
1da177e4
LT		 2530 return status;
2531}
2532
55a97593 2533int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
2538 err = nfs4_handle_exception(server,
2539 _nfs4_server_capabilities(server, fhandle),
2540 &exception);
2541 } while (exception.retry);
2542 return err;
2543}
2544
2545static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2546 struct nfs_fsinfo *info)
2547{
1da177e4
LT		 2548 struct nfs4_lookup_root_arg args = {
2549 .bitmask = nfs4_fattr_bitmap,
2550 };
2551 struct nfs4_lookup_res res = {
2552 .server = server,
0e574af1 2553 .fattr = info->fattr,
1da177e4
LT		 2554 .fh = fhandle,
2555 };
2556 struct rpc_message msg = {
2557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2558 .rpc_argp = &args,
2559 .rpc_resp = &res,
2560 };
008f55d0 2561
0e574af1 2562 nfs_fattr_init(info->fattr);
7c513058 2563 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2564}
2565
2566static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2567 struct nfs_fsinfo *info)
2568{
2569 struct nfs4_exception exception = { };
2570 int err;
2571 do {
fb8a5ba8
BS		 2572 err = _nfs4_lookup_root(server, fhandle, info);
2573 switch (err) {
2574 case 0:
2575 case -NFS4ERR_WRONGSEC:
05e9cfb4 2576 goto out;
fb8a5ba8
BS		 2577 default:
2578 err = nfs4_handle_exception(server, err, &exception);
2579 }
1da177e4 2580 } while (exception.retry);
05e9cfb4 2581out:
1da177e4
LT		 2582 return err;
2583}
2584
8f70e95f
BS		 2585static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2586 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2587{
2588 struct rpc_auth *auth;
2589 int ret;
2590
2591 auth = rpcauth_create(flavor, server->client);
e8d920c5 2592 if (IS_ERR(auth)) {
75bc8821 2593 ret = -EACCES;
8f70e95f
BS		 2594 goto out;
2595 }
2596 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2597out:
2598 return ret;
2599}
2600
9a744ba3
CL		 2601/*
2602 * Retry pseudoroot lookup with various security flavors. We do this when:
2603 *
2604 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2605 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2606 *
2607 * Returns zero on success, or a negative NFS4ERR value, or a
2608 * negative errno value.
2609 */
801a16dc 2610static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2611 struct nfs_fsinfo *info)
1da177e4 2612{
9a744ba3
CL		 2613 /* Per 3530bis 15.33.5 */
2614 static const rpc_authflavor_t flav_array[] = {
2615 RPC_AUTH_GSS_KRB5P,
2616 RPC_AUTH_GSS_KRB5I,
2617 RPC_AUTH_GSS_KRB5,
c4eafe11 2618 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2619 RPC_AUTH_NULL,
2620 };
2621 int status = -EPERM;
2622 size_t i;
6a1a1e34 2623
9a744ba3 2624 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2625 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2626 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2627 continue;
2628 break;
8f70e95f 2629 }
9a744ba3 2630
fb8a5ba8
BS		 2631 /*
2632 * -EACCESS could mean that the user doesn't have correct permissions
2633 * to access the mount. It could also mean that we tried to mount
2634 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2635 * existing mount programs don't handle -EACCES very well so it should
2636 * be mapped to -EPERM instead.
2637 */
2638 if (status == -EACCES)
2639 status = -EPERM;
801a16dc
BS		 2640 return status;
2641}
2642
2ed4b95b
CL		 2643static int nfs4_do_find_root_sec(struct nfs_server *server,
2644 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2645{
2646 int mv = server->nfs_client->cl_minorversion;
2647 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2648}
2649
2650/**
2651 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2652 * @server: initialized nfs_server handle
2653 * @fhandle: we fill in the pseudo-fs root file handle
2654 * @info: we fill in an FSINFO struct
2655 *
2656 * Returns zero on success, or a negative errno.
801a16dc 2657 */
3028eb2b
BS		 2658int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2659 struct nfs_fsinfo *info)
801a16dc 2660{
2ed4b95b
CL		 2661 int status;
2662
2663 status = nfs4_lookup_root(server, fhandle, info);
2664 if ((status == -NFS4ERR_WRONGSEC) &&
2665 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2666 status = nfs4_do_find_root_sec(server, fhandle, info);
2667
1da177e4
LT		 2668 if (status == 0)
2669 status = nfs4_server_capabilities(server, fhandle);
2670 if (status == 0)
2671 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2672
c12e87f4 2673 return nfs4_map_errors(status);
1da177e4
LT		 2674}
2675
bae36241
BS		 2676static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2677 struct nfs_fsinfo *info)
2678{
2679 int error;
2680 struct nfs_fattr *fattr = info->fattr;
2681
2682 error = nfs4_server_capabilities(server, mntfh);
2683 if (error < 0) {
2684 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2685 return error;
2686 }
2687
2688 error = nfs4_proc_getattr(server, mntfh, fattr);
2689 if (error < 0) {
2690 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2691 return error;
2692 }
2693
2694 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2695 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2696 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2697
2698 return error;
2699}
2700
6b97fd3d
MN		 2701/*
2702 * Get locations and (maybe) other attributes of a referral.
2703 * Note that we'll actually follow the referral later when
2704 * we detect fsid mismatch in inode revalidation
2705 */
f05d147f
BS		 2706static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2707 const struct qstr *name, struct nfs_fattr *fattr,
2708 struct nfs_fh *fhandle)
6b97fd3d
MN		 2709{
2710 int status = -ENOMEM;
2711 struct page *page = NULL;
2712 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2713
2714 page = alloc_page(GFP_KERNEL);
2715 if (page == NULL)
2716 goto out;
2717 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2718 if (locations == NULL)
2719 goto out;
2720
f05d147f 2721 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2722 if (status != 0)
2723 goto out;
2724 /* Make sure server returned a different fsid for the referral */
2725 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2726 dprintk("%s: server did not return a different fsid for"
2727 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2728 status = -EIO;
2729 goto out;
2730 }
533eb461
AA		 2731 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2732 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2733
533eb461 2734 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2735 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2736 memset(fhandle, 0, sizeof(struct nfs_fh));
2737out:
2738 if (page)
2739 __free_page(page);
5d7ca35a 2740 kfree(locations);
6b97fd3d
MN		 2741 return status;
2742}
2743
1da177e4
LT		 2744static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2745{
2746 struct nfs4_getattr_arg args = {
2747 .fh = fhandle,
2748 .bitmask = server->attr_bitmask,
2749 };
2750 struct nfs4_getattr_res res = {
2751 .fattr = fattr,
2752 .server = server,
2753 };
2754 struct rpc_message msg = {
2755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2756 .rpc_argp = &args,
2757 .rpc_resp = &res,
2758 };
2759
0e574af1 2760 nfs_fattr_init(fattr);
7c513058 2761 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2762}
2763
2764static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2765{
2766 struct nfs4_exception exception = { };
2767 int err;
2768 do {
2769 err = nfs4_handle_exception(server,
2770 _nfs4_proc_getattr(server, fhandle, fattr),
2771 &exception);
2772 } while (exception.retry);
2773 return err;
2774}
2775
2776/*
2777 * The file is not closed if it is opened due to the a request to change
2778 * the size of the file. The open call will not be needed once the
2779 * VFS layer lookup-intents are implemented.
2780 *
2781 * Close is called when the inode is destroyed.
2782 * If we haven't opened the file for O_WRONLY, we
2783 * need to in the size_change case to obtain a stateid.
2784 *
2785 * Got race?
2786 * Because OPEN is always done by name in nfsv4, it is
2787 * possible that we opened a different file by the same
2788 * name. We can recognize this race condition, but we
2789 * can't do anything about it besides returning an error.
2790 *
2791 * This will be fixed with VFS changes (lookup-intent).
2792 */
2793static int
2794nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2795 struct iattr *sattr)
2796{
08e9eac4 2797 struct inode *inode = dentry->d_inode;
659bfcd6 2798 struct rpc_cred *cred = NULL;
d530838b 2799 struct nfs4_state *state = NULL;
1da177e4
LT		 2800 int status;
2801
8a1636c4 2802 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2803 pnfs_commit_and_return_layout(inode);
8a1636c4 2804
0e574af1 2805 nfs_fattr_init(fattr);
1da177e4 2806
2669940d
AA		 2807 /* Deal with open(O_TRUNC) */
2808 if (sattr->ia_valid & ATTR_OPEN)
2809 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2810
2811 /* Optimization: if the end result is no change, don't RPC */
2812 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2813 return 0;
2814
d530838b 2815 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2816 if (sattr->ia_valid & ATTR_FILE) {
2817 struct nfs_open_context *ctx;
2818
2819 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2820 if (ctx) {
2821 cred = ctx->cred;
2822 state = ctx->state;
2823 }
659bfcd6 2824 }
08e9eac4 2825
659bfcd6 2826 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2827 if (status == 0)
2828 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2829 return status;
2830}
2831
0c2e53f1
TM		 2832static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2833 const struct qstr *name, struct nfs_fh *fhandle,
2834 struct nfs_fattr *fattr)
2b3de441 2835{
0c2e53f1 2836 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2837 int status;
2838 struct nfs4_lookup_arg args = {
2839 .bitmask = server->attr_bitmask,
0c2e53f1 2840 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2841 .name = name,
2842 };
2843 struct nfs4_lookup_res res = {
2844 .server = server,
2845 .fattr = fattr,
2846 .fh = fhandle,
2847 };
2848 struct rpc_message msg = {
2849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2850 .rpc_argp = &args,
2851 .rpc_resp = &res,
2852 };
2853
2854 nfs_fattr_init(fattr);
2855
1da177e4 2856 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2857 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2858 dprintk("NFS reply lookup: %d\n", status);
2859 return status;
2860}
2861
72de53ec 2862static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2863{
7ebb9315 2864 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2865 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2866 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2867 fattr->nlink = 2;
2868}
2869
72de53ec
BS		 2870static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2871 struct qstr *name, struct nfs_fh *fhandle,
2872 struct nfs_fattr *fattr)
1da177e4
LT		 2873{
2874 struct nfs4_exception exception = { };
72de53ec 2875 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2876 int err;
2877 do {
72de53ec
BS		 2878 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2879 switch (err) {
08ef7bd3 2880 case -NFS4ERR_BADNAME:
72de53ec
BS		 2881 err = -ENOENT;
2882 goto out;
0c2e53f1 2883 case -NFS4ERR_MOVED:
f05d147f 2884 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2885 goto out;
0c2e53f1 2886 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2887 err = -EPERM;
2888 if (client != *clnt)
2889 goto out;
2890
2891 client = nfs4_create_sec_client(client, dir, name);
2892 if (IS_ERR(client))
2893 return PTR_ERR(client);
2894
2895 exception.retry = 1;
2896 break;
2897 default:
2898 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2899 }
1da177e4 2900 } while (exception.retry);
72de53ec
BS		 2901
2902out:
2903 if (err == 0)
2904 *clnt = client;
2905 else if (client != *clnt)
2906 rpc_shutdown_client(client);
2907
1da177e4
LT		 2908 return err;
2909}
2910
80a16b21 2911static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2912 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2913{
2914 int status;
2915 struct rpc_clnt *client = NFS_CLIENT(dir);
2916
2917 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2918 if (client != NFS_CLIENT(dir)) {
2919 rpc_shutdown_client(client);
2920 nfs_fixup_secinfo_attributes(fattr);
2921 }
2922 return status;
2923}
2924
f05d147f
BS		 2925struct rpc_clnt *
2926nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2927 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2928{
2929 int status;
2930 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2931
2932 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2933 if (status < 0) {
2934 rpc_shutdown_client(client);
2935 return ERR_PTR(status);
2936 }
2937 return client;
2938}
2939
1da177e4
LT		 2940static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2941{
76b32999 2942 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2943 struct nfs4_accessargs args = {
2944 .fh = NFS_FH(inode),
a4980e78 2945 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2946 };
2947 struct nfs4_accessres res = {
2948 .server = server,
1da177e4 2949 };
1da177e4
LT		 2950 struct rpc_message msg = {
2951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2952 .rpc_argp = &args,
2953 .rpc_resp = &res,
2954 .rpc_cred = entry->cred,
2955 };
2956 int mode = entry->mask;
2957 int status;
2958
2959 /*
2960 * Determine which access bits we want to ask for...
2961 */
2962 if (mode & MAY_READ)
2963 args.access |= NFS4_ACCESS_READ;
2964 if (S_ISDIR(inode->i_mode)) {
2965 if (mode & MAY_WRITE)
2966 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2967 if (mode & MAY_EXEC)
2968 args.access |= NFS4_ACCESS_LOOKUP;
2969 } else {
2970 if (mode & MAY_WRITE)
2971 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2972 if (mode & MAY_EXEC)
2973 args.access |= NFS4_ACCESS_EXECUTE;
2974 }
c407d41a
TM		 2975
2976 res.fattr = nfs_alloc_fattr();
2977 if (res.fattr == NULL)
2978 return -ENOMEM;
2979
7c513058 2980 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2981 if (!status) {
6168f62c 2982 nfs_access_set_mask(entry, res.access);
c407d41a 2983 nfs_refresh_inode(inode, res.fattr);
1da177e4 2984 }
c407d41a 2985 nfs_free_fattr(res.fattr);
1da177e4
LT		 2986 return status;
2987}
2988
2989static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2990{
2991 struct nfs4_exception exception = { };
2992 int err;
2993 do {
2994 err = nfs4_handle_exception(NFS_SERVER(inode),
2995 _nfs4_proc_access(inode, entry),
2996 &exception);
2997 } while (exception.retry);
2998 return err;
2999}
3000
3001/*
3002 * TODO: For the time being, we don't try to get any attributes
3003 * along with any of the zero-copy operations READ, READDIR,
3004 * READLINK, WRITE.
3005 *
3006 * In the case of the first three, we want to put the GETATTR
3007 * after the read-type operation -- this is because it is hard
3008 * to predict the length of a GETATTR response in v4, and thus
3009 * align the READ data correctly. This means that the GETATTR
3010 * may end up partially falling into the page cache, and we should
3011 * shift it into the 'tail' of the xdr_buf before processing.
3012 * To do this efficiently, we need to know the total length
3013 * of data received, which doesn't seem to be available outside
3014 * of the RPC layer.
3015 *
3016 * In the case of WRITE, we also want to put the GETATTR after
3017 * the operation -- in this case because we want to make sure
140150db 3018 * we get the post-operation mtime and size.
1da177e4
LT		 3019 *
3020 * Both of these changes to the XDR layer would in fact be quite
3021 * minor, but I decided to leave them for a subsequent patch.
3022 */
3023static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3024 unsigned int pgbase, unsigned int pglen)
3025{
3026 struct nfs4_readlink args = {
3027 .fh = NFS_FH(inode),
3028 .pgbase = pgbase,
3029 .pglen = pglen,
3030 .pages = &page,
3031 };
f50c7000 3032 struct nfs4_readlink_res res;
1da177e4
LT		 3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3035 .rpc_argp = &args,
f50c7000 3036 .rpc_resp = &res,
1da177e4
LT		 3037 };
3038
7c513058 3039 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3040}
3041
3042static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3043 unsigned int pgbase, unsigned int pglen)
3044{
3045 struct nfs4_exception exception = { };
3046 int err;
3047 do {
3048 err = nfs4_handle_exception(NFS_SERVER(inode),
3049 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3050 &exception);
3051 } while (exception.retry);
3052 return err;
3053}
3054
1da177e4 3055/*
8867fe58 3056 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3057 */
1da177e4
LT		 3058static int
3059nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3060 int flags)
1da177e4 3061{
8867fe58 3062 struct nfs_open_context *ctx;
1da177e4 3063 struct nfs4_state *state;
1da177e4
LT		 3064 int status = 0;
3065
8867fe58
MS		 3066 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3067 if (IS_ERR(ctx))
3068 return PTR_ERR(ctx);
3069
a8a5da99 3070 sattr->ia_mode &= ~current_umask();
4197a055 3071 state = nfs4_do_open(dir, ctx, flags, sattr);
1da177e4
LT		 3072 if (IS_ERR(state)) {
3073 status = PTR_ERR(state);
c0204fd2 3074 goto out;
1da177e4 3075 }
1da177e4 3076out:
8867fe58 3077 put_nfs_open_context(ctx);
1da177e4
LT		 3078 return status;
3079}
3080
3081static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3082{
16e42959 3083 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3084 struct nfs_removeargs args = {
1da177e4 3085 .fh = NFS_FH(dir),
26fe5750 3086 .name = *name,
16e42959 3087 };
4fdc17b2 3088 struct nfs_removeres res = {
16e42959 3089 .server = server,
1da177e4 3090 };
1da177e4 3091 struct rpc_message msg = {
4fdc17b2
TM		 3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3093 .rpc_argp = &args,
3094 .rpc_resp = &res,
1da177e4 3095 };
778d2817 3096 int status;
1da177e4 3097
7c513058 3098 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3099 if (status == 0)
16e42959 3100 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3101 return status;
3102}
3103
3104static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3105{
3106 struct nfs4_exception exception = { };
3107 int err;
3108 do {
3109 err = nfs4_handle_exception(NFS_SERVER(dir),
3110 _nfs4_proc_remove(dir, name),
3111 &exception);
3112 } while (exception.retry);
3113 return err;
3114}
3115
e4eff1a6 3116static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3117{
e4eff1a6
TM		 3118 struct nfs_server *server = NFS_SERVER(dir);
3119 struct nfs_removeargs *args = msg->rpc_argp;
3120 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3121
e4eff1a6 3122 res->server = server;
1da177e4 3123 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3124 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3125}
3126
34e137cc
BS		 3127static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3128{
d9afbd1b
TM		 3129 nfs4_setup_sequence(NFS_SERVER(data->dir),
3130 &data->args.seq_args,
3131 &data->res.seq_res,
3132 task);
1da177e4
LT		 3133}
3134
e4eff1a6 3135static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3136{
e4eff1a6
TM		 3137 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3138
14516c3a
TM		 3139 if (!nfs4_sequence_done(task, &res->seq_res))
3140 return 0;
9e33bed5 3141 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3142 return 0;
3143 update_changeattr(dir, &res->cinfo);
e4eff1a6 3144 return 1;
1da177e4
LT		 3145}
3146
d3d4152a
JL		 3147static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3148{
3149 struct nfs_server *server = NFS_SERVER(dir);
3150 struct nfs_renameargs *arg = msg->rpc_argp;
3151 struct nfs_renameres *res = msg->rpc_resp;
3152
3153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3154 res->server = server;
9d12b216 3155 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3156}
3157
c6bfa1a1
BS		 3158static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3159{
d9afbd1b
TM		 3160 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3161 &data->args.seq_args,
3162 &data->res.seq_res,
3163 task);
d3d4152a
JL		 3164}
3165
3166static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3167 struct inode *new_dir)
3168{
3169 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3170
3171 if (!nfs4_sequence_done(task, &res->seq_res))
3172 return 0;
3173 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3174 return 0;
3175
3176 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3177 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3178 return 1;
3179}
3180
1da177e4
LT		 3181static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3182 struct inode *new_dir, struct qstr *new_name)
3183{
6caf2c82 3184 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3185 struct nfs_renameargs arg = {
1da177e4
LT		 3186 .old_dir = NFS_FH(old_dir),
3187 .new_dir = NFS_FH(new_dir),
3188 .old_name = old_name,
3189 .new_name = new_name,
6caf2c82 3190 };
e8582a8b 3191 struct nfs_renameres res = {
6caf2c82 3192 .server = server,
1da177e4 3193 };
1da177e4
LT		 3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3196 .rpc_argp = &arg,
3197 .rpc_resp = &res,
3198 };
011fff72 3199 int status = -ENOMEM;
1da177e4 3200
7c513058 3201 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3202 if (!status) {
3203 update_changeattr(old_dir, &res.old_cinfo);
3204 update_changeattr(new_dir, &res.new_cinfo);
3205 }
3206 return status;
3207}
3208
3209static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3210 struct inode *new_dir, struct qstr *new_name)
3211{
3212 struct nfs4_exception exception = { };
3213 int err;
3214 do {
3215 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3216 _nfs4_proc_rename(old_dir, old_name,
3217 new_dir, new_name),
3218 &exception);
3219 } while (exception.retry);
3220 return err;
3221}
3222
3223static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3224{
91ba2eee 3225 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3226 struct nfs4_link_arg arg = {
3227 .fh = NFS_FH(inode),
3228 .dir_fh = NFS_FH(dir),
3229 .name = name,
91ba2eee
TM		 3230 .bitmask = server->attr_bitmask,
3231 };
91ba2eee
TM		 3232 struct nfs4_link_res res = {
3233 .server = server,
1da177e4 3234 };
1da177e4
LT		 3235 struct rpc_message msg = {
3236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3237 .rpc_argp = &arg,
91ba2eee 3238 .rpc_resp = &res,
1da177e4 3239 };
136f2627
TM		 3240 int status = -ENOMEM;
3241
3242 res.fattr = nfs_alloc_fattr();
778d2817 3243 if (res.fattr == NULL)
136f2627 3244 goto out;
1da177e4 3245
7c513058 3246 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3247 if (!status) {
3248 update_changeattr(dir, &res.cinfo);
73a3d07c 3249 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3250 }
136f2627 3251out:
136f2627 3252 nfs_free_fattr(res.fattr);
1da177e4
LT		 3253 return status;
3254}
3255
3256static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3257{
3258 struct nfs4_exception exception = { };
3259 int err;
3260 do {
3261 err = nfs4_handle_exception(NFS_SERVER(inode),
3262 _nfs4_proc_link(inode, dir, name),
3263 &exception);
3264 } while (exception.retry);
3265 return err;
3266}
3267
57dc9a57
TM		 3268struct nfs4_createdata {
3269 struct rpc_message msg;
3270 struct nfs4_create_arg arg;
3271 struct nfs4_create_res res;
3272 struct nfs_fh fh;
3273 struct nfs_fattr fattr;
57dc9a57
TM		 3274};
3275
3276static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3277 struct qstr *name, struct iattr *sattr, u32 ftype)
3278{
3279 struct nfs4_createdata *data;
3280
3281 data = kzalloc(sizeof(*data), GFP_KERNEL);
3282 if (data != NULL) {
3283 struct nfs_server *server = NFS_SERVER(dir);
3284
3285 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3286 data->msg.rpc_argp = &data->arg;
3287 data->msg.rpc_resp = &data->res;
3288 data->arg.dir_fh = NFS_FH(dir);
3289 data->arg.server = server;
3290 data->arg.name = name;
3291 data->arg.attrs = sattr;
3292 data->arg.ftype = ftype;
3293 data->arg.bitmask = server->attr_bitmask;
3294 data->res.server = server;
3295 data->res.fh = &data->fh;
3296 data->res.fattr = &data->fattr;
57dc9a57 3297 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3298 }
3299 return data;
3300}
3301
3302static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3303{
7c513058 3304 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3305 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3306 if (status == 0) {
3307 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3308 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3309 }
3310 return status;
3311}
3312
3313static void nfs4_free_createdata(struct nfs4_createdata *data)
3314{
3315 kfree(data);
3316}
3317
4f390c15 3318static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3319 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3320{
57dc9a57
TM		 3321 struct nfs4_createdata *data;
3322 int status = -ENAMETOOLONG;
1da177e4 3323
94a6d753 3324 if (len > NFS4_MAXPATHLEN)
57dc9a57 3325 goto out;
4f390c15 3326
57dc9a57
TM		 3327 status = -ENOMEM;
3328 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3329 if (data == NULL)
3330 goto out;
3331
3332 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3333 data->arg.u.symlink.pages = &page;
3334 data->arg.u.symlink.len = len;
1da177e4 3335
57dc9a57
TM		 3336 status = nfs4_do_create(dir, dentry, data);
3337
3338 nfs4_free_createdata(data);
3339out:
1da177e4
LT		 3340 return status;
3341}
3342
4f390c15 3343static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3344 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3345{
3346 struct nfs4_exception exception = { };
3347 int err;
3348 do {
3349 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3350 _nfs4_proc_symlink(dir, dentry, page,
3351 len, sattr),
1da177e4
LT		 3352 &exception);
3353 } while (exception.retry);
3354 return err;
3355}
3356
3357static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3358 struct iattr *sattr)
3359{
57dc9a57
TM		 3360 struct nfs4_createdata *data;
3361 int status = -ENOMEM;
1da177e4 3362
57dc9a57
TM		 3363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3364 if (data == NULL)
3365 goto out;
3366
3367 status = nfs4_do_create(dir, dentry, data);
3368
3369 nfs4_free_createdata(data);
3370out:
1da177e4
LT		 3371 return status;
3372}
3373
3374static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3375 struct iattr *sattr)
3376{
3377 struct nfs4_exception exception = { };
3378 int err;
a8a5da99
AK		 3379
3380 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3381 do {
3382 err = nfs4_handle_exception(NFS_SERVER(dir),
3383 _nfs4_proc_mkdir(dir, dentry, sattr),
3384 &exception);
3385 } while (exception.retry);
3386 return err;
3387}
3388
3389static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3390 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3391{
3392 struct inode *dir = dentry->d_inode;
3393 struct nfs4_readdir_arg args = {
3394 .fh = NFS_FH(dir),
56e4ebf8 3395 .pages = pages,
1da177e4
LT		 3396 .pgbase = 0,
3397 .count = count,
96d25e53 3398 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3399 .plus = plus,
1da177e4
LT		 3400 };
3401 struct nfs4_readdir_res res;
3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3404 .rpc_argp = &args,
3405 .rpc_resp = &res,
3406 .rpc_cred = cred,
3407 };
3408 int status;
3409
3110ff80 3410 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3411 dentry->d_parent->d_name.name,
3412 dentry->d_name.name,
3413 (unsigned long long)cookie);
c3f52af3 3414 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3415 res.pgbase = args.pgbase;
7c513058 3416 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3417 if (status >= 0) {
c3f52af3 3418 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3419 status += args.pgbase;
3420 }
c4812998
TM		 3421
3422 nfs_invalidate_atime(dir);
3423
3110ff80 3424 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3425 return status;
3426}
3427
3428static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3429 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3430{
3431 struct nfs4_exception exception = { };
3432 int err;
3433 do {
3434 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3435 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3436 pages, count, plus),
1da177e4
LT		 3437 &exception);
3438 } while (exception.retry);
3439 return err;
3440}
3441
3442static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3443 struct iattr *sattr, dev_t rdev)
3444{
57dc9a57
TM		 3445 struct nfs4_createdata *data;
3446 int mode = sattr->ia_mode;
3447 int status = -ENOMEM;
1da177e4 3448
57dc9a57
TM		 3449 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3450 if (data == NULL)
3451 goto out;
3452
1da177e4 3453 if (S_ISFIFO(mode))
57dc9a57 3454 data->arg.ftype = NF4FIFO;
1da177e4 3455 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3456 data->arg.ftype = NF4BLK;
3457 data->arg.u.device.specdata1 = MAJOR(rdev);
3458 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3459 }
3460 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3461 data->arg.ftype = NF4CHR;
3462 data->arg.u.device.specdata1 = MAJOR(rdev);
3463 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3464 } else if (!S_ISSOCK(mode)) {
3465 status = -EINVAL;
3466 goto out_free;
1da177e4 3467 }
1da177e4 3468
57dc9a57 3469 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3470out_free:
57dc9a57
TM		 3471 nfs4_free_createdata(data);
3472out:
1da177e4
LT		 3473 return status;
3474}
3475
3476static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3477 struct iattr *sattr, dev_t rdev)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
a8a5da99
AK		 3481
3482 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3483 do {
3484 err = nfs4_handle_exception(NFS_SERVER(dir),
3485 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3486 &exception);
3487 } while (exception.retry);
3488 return err;
3489}
3490
3491static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3492 struct nfs_fsstat *fsstat)
3493{
3494 struct nfs4_statfs_arg args = {
3495 .fh = fhandle,
3496 .bitmask = server->attr_bitmask,
3497 };
24ad148a
BH		 3498 struct nfs4_statfs_res res = {
3499 .fsstat = fsstat,
3500 };
1da177e4
LT		 3501 struct rpc_message msg = {
3502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3503 .rpc_argp = &args,
24ad148a 3504 .rpc_resp = &res,
1da177e4
LT		 3505 };
3506
0e574af1 3507 nfs_fattr_init(fsstat->fattr);
7c513058 3508 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3509}
3510
3511static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3512{
3513 struct nfs4_exception exception = { };
3514 int err;
3515 do {
3516 err = nfs4_handle_exception(server,
3517 _nfs4_proc_statfs(server, fhandle, fsstat),
3518 &exception);
3519 } while (exception.retry);
3520 return err;
3521}
3522
3523static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3524 struct nfs_fsinfo *fsinfo)
3525{
3526 struct nfs4_fsinfo_arg args = {
3527 .fh = fhandle,
3528 .bitmask = server->attr_bitmask,
3529 };
3dda5e43
BH		 3530 struct nfs4_fsinfo_res res = {
3531 .fsinfo = fsinfo,
3532 };
1da177e4
LT		 3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3535 .rpc_argp = &args,
3dda5e43 3536 .rpc_resp = &res,
1da177e4
LT		 3537 };
3538
7c513058 3539 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3540}
3541
3542static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3543{
3544 struct nfs4_exception exception = { };
83ca7f5a 3545 unsigned long now = jiffies;
1da177e4
LT		 3546 int err;
3547
3548 do {
83ca7f5a
CL		 3549 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3550 if (err == 0) {
3551 struct nfs_client *clp = server->nfs_client;
3552
3553 spin_lock(&clp->cl_lock);
3554 clp->cl_lease_time = fsinfo->lease_time * HZ;
3555 clp->cl_last_renewal = now;
3556 spin_unlock(&clp->cl_lock);
3557 break;
3558 }
3559 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3560 } while (exception.retry);
3561 return err;
3562}
3563
3564static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3565{
e38eb650
BS		 3566 int error;
3567
0e574af1 3568 nfs_fattr_init(fsinfo->fattr);
e38eb650 3569 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3570 if (error == 0) {
3571 /* block layout checks this! */
3572 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3573 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3574 }
e38eb650
BS		 3575
3576 return error;
1da177e4
LT		 3577}
3578
3579static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3580 struct nfs_pathconf *pathconf)
3581{
3582 struct nfs4_pathconf_arg args = {
3583 .fh = fhandle,
3584 .bitmask = server->attr_bitmask,
3585 };
d45b2989
BH		 3586 struct nfs4_pathconf_res res = {
3587 .pathconf = pathconf,
3588 };
1da177e4
LT		 3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3591 .rpc_argp = &args,
d45b2989 3592 .rpc_resp = &res,
1da177e4
LT		 3593 };
3594
3595 /* None of the pathconf attributes are mandatory to implement */
3596 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3597 memset(pathconf, 0, sizeof(*pathconf));
3598 return 0;
3599 }
3600
0e574af1 3601 nfs_fattr_init(pathconf->fattr);
7c513058 3602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3603}
3604
3605static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3606 struct nfs_pathconf *pathconf)
3607{
3608 struct nfs4_exception exception = { };
3609 int err;
3610
3611 do {
3612 err = nfs4_handle_exception(server,
3613 _nfs4_proc_pathconf(server, fhandle, pathconf),
3614 &exception);
3615 } while (exception.retry);
3616 return err;
3617}
3618
5521abfd 3619int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3620 const struct nfs_open_context *ctx,
3621 const struct nfs_lock_context *l_ctx,
3622 fmode_t fmode)
3623{
3624 const struct nfs_lockowner *lockowner = NULL;
3625
3626 if (l_ctx != NULL)
3627 lockowner = &l_ctx->lockowner;
5521abfd 3628 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3629}
3630EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3631
5521abfd
TM		 3632static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3633 const struct nfs_open_context *ctx,
3634 const struct nfs_lock_context *l_ctx,
3635 fmode_t fmode)
3636{
3637 nfs4_stateid current_stateid;
3638
3639 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3640 return false;
3641 return nfs4_stateid_match(stateid, &current_stateid);
3642}
3643
3644static bool nfs4_error_stateid_expired(int err)
3645{
3646 switch (err) {
3647 case -NFS4ERR_DELEG_REVOKED:
3648 case -NFS4ERR_ADMIN_REVOKED:
3649 case -NFS4ERR_BAD_STATEID:
3650 case -NFS4ERR_STALE_STATEID:
3651 case -NFS4ERR_OLD_STATEID:
3652 case -NFS4ERR_OPENMODE:
3653 case -NFS4ERR_EXPIRED:
3654 return true;
3655 }
3656 return false;
3657}
3658
d20581aa
BH		 3659void __nfs4_read_done_cb(struct nfs_read_data *data)
3660{
cd841605 3661 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3662}
3663
cbdabc7f 3664static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3665{
cd841605 3666 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3667
9e33bed5 3668 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3669 rpc_restart_call_prepare(task);
ec06c096 3670 return -EAGAIN;
1da177e4 3671 }
8850df99 3672
d20581aa 3673 __nfs4_read_done_cb(data);
1da177e4 3674 if (task->tk_status > 0)
ec06c096
TM		 3675 renew_lease(server, data->timestamp);
3676 return 0;
1da177e4
LT		 3677}
3678
5521abfd
TM		 3679static bool nfs4_read_stateid_changed(struct rpc_task *task,
3680 struct nfs_readargs *args)
3681{
3682
3683 if (!nfs4_error_stateid_expired(task->tk_status) ||
3684 nfs4_stateid_is_current(&args->stateid,
3685 args->context,
3686 args->lock_context,
3687 FMODE_READ))
3688 return false;
3689 rpc_restart_call_prepare(task);
3690 return true;
3691}
3692
cbdabc7f
AA		 3693static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3694{
3695
3696 dprintk("--> %s\n", __func__);
3697
3698 if (!nfs4_sequence_done(task, &data->res.seq_res))
3699 return -EAGAIN;
5521abfd
TM		 3700 if (nfs4_read_stateid_changed(task, &data->args))
3701 return -EAGAIN;
d20581aa
BH		 3702 return data->read_done_cb ? data->read_done_cb(task, data) :
3703 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3704}
3705
bdc7f021 3706static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3707{
1da177e4 3708 data->timestamp = jiffies;
cbdabc7f 3709 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3710 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3711 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3712}
3713
ea7c3303
BS		 3714static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3715{
9b206149 3716 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3717 &data->args.seq_args,
3718 &data->res.seq_res,
9b206149
TM		 3719 task))
3720 return;
3721 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3722 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3723}
3724
b029bc9b 3725static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3726{
cd841605 3727 struct inode *inode = data->header->inode;
1da177e4 3728
9e33bed5 3729 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3730 rpc_restart_call_prepare(task);
788e7a89 3731 return -EAGAIN;
1da177e4 3732 }
4f9838c7 3733 if (task->tk_status >= 0) {
1da177e4 3734 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3735 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3736 }
788e7a89 3737 return 0;
1da177e4
LT		 3738}
3739
5521abfd
TM		 3740static bool nfs4_write_stateid_changed(struct rpc_task *task,
3741 struct nfs_writeargs *args)
3742{
3743
3744 if (!nfs4_error_stateid_expired(task->tk_status) ||
3745 nfs4_stateid_is_current(&args->stateid,
3746 args->context,
3747 args->lock_context,
3748 FMODE_WRITE))
3749 return false;
3750 rpc_restart_call_prepare(task);
3751 return true;
3752}
3753
b029bc9b
FI		 3754static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3755{
3756 if (!nfs4_sequence_done(task, &data->res.seq_res))
3757 return -EAGAIN;
5521abfd
TM		 3758 if (nfs4_write_stateid_changed(task, &data->args))
3759 return -EAGAIN;
d20581aa
BH		 3760 return data->write_done_cb ? data->write_done_cb(task, data) :
3761 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3762}
3763
5a37f851
TM		 3764static
3765bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3766{
5a37f851
TM		 3767 const struct nfs_pgio_header *hdr = data->header;
3768
3769 /* Don't request attributes for pNFS or O_DIRECT writes */
3770 if (data->ds_clp != NULL || hdr->dreq != NULL)
3771 return false;
3772 /* Otherwise, request attributes if and only if we don't hold
3773 * a delegation
3774 */
011e2a7f 3775 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3776}
a69aef14 3777
bdc7f021 3778static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3779{
cd841605 3780 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3781
5a37f851 3782 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3783 data->args.bitmask = NULL;
3784 data->res.fattr = NULL;
3785 } else
3786 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3787
b029bc9b
FI		 3788 if (!data->write_done_cb)
3789 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3790 data->res.server = server;
1da177e4
LT		 3791 data->timestamp = jiffies;
3792
bdc7f021 3793 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3794 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3795}
3796
c6cb80d0
BS		 3797static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3798{
9b206149 3799 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3800 &data->args.seq_args,
3801 &data->res.seq_res,
9b206149
TM		 3802 task))
3803 return;
3804 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3805 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3806}
3807
0b7c0153 3808static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3809{
d9afbd1b
TM		 3810 nfs4_setup_sequence(NFS_SERVER(data->inode),
3811 &data->args.seq_args,
3812 &data->res.seq_res,
3813 task);
1da177e4
LT		 3814}
3815
0b7c0153 3816static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3817{
1da177e4 3818 struct inode *inode = data->inode;
14516c3a 3819
9e33bed5 3820 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3821 rpc_restart_call_prepare(task);
788e7a89 3822 return -EAGAIN;
1da177e4 3823 }
788e7a89 3824 return 0;
1da177e4
LT		 3825}
3826
0b7c0153 3827static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3828{
3829 if (!nfs4_sequence_done(task, &data->res.seq_res))
3830 return -EAGAIN;
0b7c0153 3831 return data->commit_done_cb(task, data);
5f452431
FI		 3832}
3833
0b7c0153 3834static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3835{
788e7a89 3836 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3837
0b7c0153
FI		 3838 if (data->commit_done_cb == NULL)
3839 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3840 data->res.server = server;
bdc7f021 3841 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3842 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3843}
3844
9bc4e3ca
CL		 3845struct nfs4_renewdata {
3846 struct nfs_client *client;
3847 unsigned long timestamp;
3848};
3849
1da177e4
LT		 3850/*
3851 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3852 * standalone procedure for queueing an asynchronous RENEW.
3853 */
9bc4e3ca 3854static void nfs4_renew_release(void *calldata)
dc96aef9 3855{
9bc4e3ca
CL		 3856 struct nfs4_renewdata *data = calldata;
3857 struct nfs_client *clp = data->client;
dc96aef9 3858
0851de06
AB		 3859 if (atomic_read(&clp->cl_count) > 1)
3860 nfs4_schedule_state_renewal(clp);
3861 nfs_put_client(clp);
9bc4e3ca 3862 kfree(data);
dc96aef9
AB		 3863}
3864
9bc4e3ca 3865static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3866{
9bc4e3ca
CL		 3867 struct nfs4_renewdata *data = calldata;
3868 struct nfs_client *clp = data->client;
3869 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3870
3871 if (task->tk_status < 0) {
95baa25c 3872 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3873 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3874 return;
3875 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3876 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3877 return;
3878 }
3879 nfs4_schedule_path_down_recovery(clp);
1da177e4 3880 }
452e9352 3881 do_renew_lease(clp, timestamp);
1da177e4
LT		 3882}
3883
963d8fe5
TM		 3884static const struct rpc_call_ops nfs4_renew_ops = {
3885 .rpc_call_done = nfs4_renew_done,
dc96aef9 3886 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3887};
3888
2f60ea6b 3889static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3890{
3891 struct rpc_message msg = {
3892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3893 .rpc_argp = clp,
b4454fe1 3894 .rpc_cred = cred,
1da177e4 3895 };
9bc4e3ca 3896 struct nfs4_renewdata *data;
1da177e4 3897
2f60ea6b
TM		 3898 if (renew_flags == 0)
3899 return 0;
0851de06
AB		 3900 if (!atomic_inc_not_zero(&clp->cl_count))
3901 return -EIO;
b569ad34 3902 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3903 if (data == NULL)
3904 return -ENOMEM;
3905 data->client = clp;
3906 data->timestamp = jiffies;
bc7a05ca 3907 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3908 &nfs4_renew_ops, data);
1da177e4
LT		 3909}
3910
8534d4ec 3911static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3912{
3913 struct rpc_message msg = {
3914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3915 .rpc_argp = clp,
b4454fe1 3916 .rpc_cred = cred,
1da177e4
LT		 3917 };
3918 unsigned long now = jiffies;
3919 int status;
3920
bc7a05ca 3921 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3922 if (status < 0)
3923 return status;
452e9352 3924 do_renew_lease(clp, now);
1da177e4
LT		 3925 return 0;
3926}
3927
aa1870af
BF		 3928static inline int nfs4_server_supports_acls(struct nfs_server *server)
3929{
3930 return (server->caps & NFS_CAP_ACLS)
3931 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3932 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3933}
3934
21f498c2
TM		 3935/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3936 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3937 * the stack.
3938 */
21f498c2 3939#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3940
e9e3d724
NH		 3941static int buf_to_pages_noslab(const void *buf, size_t buflen,
3942 struct page **pages, unsigned int *pgbase)
3943{
3944 struct page *newpage, **spages;
3945 int rc = 0;
3946 size_t len;
3947 spages = pages;
3948
3949 do {
21f498c2 3950 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3951 newpage = alloc_page(GFP_KERNEL);
3952
3953 if (newpage == NULL)
3954 goto unwind;
3955 memcpy(page_address(newpage), buf, len);
3956 buf += len;
3957 buflen -= len;
3958 *pages++ = newpage;
3959 rc++;
3960 } while (buflen != 0);
3961
3962 return rc;
3963
3964unwind:
3965 for(; rc > 0; rc--)
3966 __free_page(spages[rc-1]);
3967 return -ENOMEM;
3968}
3969
e50a1c2e
BF		 3970struct nfs4_cached_acl {
3971 int cached;
3972 size_t len;
3e9d4154 3973 char data[0];
e50a1c2e
BF		 3974};
3975
3976static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3977{
3978 struct nfs_inode *nfsi = NFS_I(inode);
3979
3980 spin_lock(&inode->i_lock);
3981 kfree(nfsi->nfs4_acl);
3982 nfsi->nfs4_acl = acl;
3983 spin_unlock(&inode->i_lock);
3984}
3985
3986static void nfs4_zap_acl_attr(struct inode *inode)
3987{
3988 nfs4_set_cached_acl(inode, NULL);
3989}
3990
3991static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3992{
3993 struct nfs_inode *nfsi = NFS_I(inode);
3994 struct nfs4_cached_acl *acl;
3995 int ret = -ENOENT;
3996
3997 spin_lock(&inode->i_lock);
3998 acl = nfsi->nfs4_acl;
3999 if (acl == NULL)
4000 goto out;
4001 if (buf == NULL) /* user is just asking for length */
4002 goto out_len;
4003 if (acl->cached == 0)
4004 goto out;
4005 ret = -ERANGE; /* see getxattr(2) man page */
4006 if (acl->len > buflen)
4007 goto out;
4008 memcpy(buf, acl->data, acl->len);
4009out_len:
4010 ret = acl->len;
4011out:
4012 spin_unlock(&inode->i_lock);
4013 return ret;
4014}
4015
5794d21e 4016static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4017{
4018 struct nfs4_cached_acl *acl;
b291f1b1 4019 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4020
1f1ea6c2 4021 if (buflen <= PAGE_SIZE) {
b291f1b1 4022 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4023 if (acl == NULL)
4024 goto out;
4025 acl->cached = 1;
5794d21e 4026 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4027 } else {
4028 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4029 if (acl == NULL)
4030 goto out;
4031 acl->cached = 0;
4032 }
4033 acl->len = acl_len;
4034out:
4035 nfs4_set_cached_acl(inode, acl);
4036}
4037
bf118a34
AA		 4038/*
4039 * The getxattr API returns the required buffer length when called with a
4040 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4041 * the required buf. On a NULL buf, we send a page of data to the server
4042 * guessing that the ACL request can be serviced by a page. If so, we cache
4043 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4044 * the cache. If not so, we throw away the page, and cache the required
4045 * length. The next getxattr call will then produce another round trip to
4046 * the server, this time with the input buf of the required size.
4047 */
16b4289c 4048static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4049{
bf118a34 4050 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4051 struct nfs_getaclargs args = {
4052 .fh = NFS_FH(inode),
4053 .acl_pages = pages,
4054 .acl_len = buflen,
4055 };
663c79b3
BH		 4056 struct nfs_getaclres res = {
4057 .acl_len = buflen,
4058 };
aa1870af
BF		 4059 struct rpc_message msg = {
4060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4061 .rpc_argp = &args,
663c79b3 4062 .rpc_resp = &res,
aa1870af 4063 };
21f498c2
TM		 4064 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4065 int ret = -ENOMEM, i;
aa1870af 4066
bf118a34
AA		 4067 /* As long as we're doing a round trip to the server anyway,
4068 * let's be prepared for a page of acl data. */
4069 if (npages == 0)
4070 npages = 1;
21f498c2
TM		 4071 if (npages > ARRAY_SIZE(pages))
4072 return -ERANGE;
5a006899 4073
bf118a34
AA		 4074 for (i = 0; i < npages; i++) {
4075 pages[i] = alloc_page(GFP_KERNEL);
4076 if (!pages[i])
4077 goto out_free;
e50a1c2e 4078 }
5a006899
SP		 4079
4080 /* for decoding across pages */
4081 res.acl_scratch = alloc_page(GFP_KERNEL);
4082 if (!res.acl_scratch)
4083 goto out_free;
4084
bf118a34
AA		 4085 args.acl_len = npages * PAGE_SIZE;
4086 args.acl_pgbase = 0;
5a006899 4087
de040bec 4088 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4089 __func__, buf, buflen, npages, args.acl_len);
4090 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4091 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4092 if (ret)
4093 goto out_free;
bf118a34 4094
1f1ea6c2
TM		 4095 /* Handle the case where the passed-in buffer is too short */
4096 if (res.acl_flags & NFS4_ACL_TRUNC) {
4097 /* Did the user only issue a request for the acl length? */
4098 if (buf == NULL)
4099 goto out_ok;
e50a1c2e 4100 ret = -ERANGE;
1f1ea6c2 4101 goto out_free;
e50a1c2e 4102 }
1f1ea6c2 4103 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4104 if (buf) {
4105 if (res.acl_len > buflen) {
4106 ret = -ERANGE;
4107 goto out_free;
4108 }
1f1ea6c2 4109 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4110 }
1f1ea6c2
TM		 4111out_ok:
4112 ret = res.acl_len;
e50a1c2e 4113out_free:
bf118a34
AA		 4114 for (i = 0; i < npages; i++)
4115 if (pages[i])
4116 __free_page(pages[i]);
331818f1
TM		 4117 if (res.acl_scratch)
4118 __free_page(res.acl_scratch);
aa1870af
BF		 4119 return ret;
4120}
4121
16b4289c
TM		 4122static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4123{
4124 struct nfs4_exception exception = { };
4125 ssize_t ret;
4126 do {
4127 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4128 if (ret >= 0)
4129 break;
4130 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4131 } while (exception.retry);
4132 return ret;
4133}
4134
e50a1c2e
BF		 4135static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4136{
4137 struct nfs_server *server = NFS_SERVER(inode);
4138 int ret;
4139
4140 if (!nfs4_server_supports_acls(server))
4141 return -EOPNOTSUPP;
4142 ret = nfs_revalidate_inode(server, inode);
4143 if (ret < 0)
4144 return ret;
08a22b39
AK		 4145 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4146 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4147 ret = nfs4_read_cached_acl(inode, buf, buflen);
4148 if (ret != -ENOENT)
bf118a34
AA		 4149 /* -ENOENT is returned if there is no ACL or if there is an ACL
4150 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4151 return ret;
4152 return nfs4_get_acl_uncached(inode, buf, buflen);
4153}
4154
16b4289c 4155static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4156{
4157 struct nfs_server *server = NFS_SERVER(inode);
4158 struct page *pages[NFS4ACL_MAXPAGES];
4159 struct nfs_setaclargs arg = {
4160 .fh = NFS_FH(inode),
4161 .acl_pages = pages,
4162 .acl_len = buflen,
4163 };
73c403a9 4164 struct nfs_setaclres res;
4b580ee3
BF		 4165 struct rpc_message msg = {
4166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4167 .rpc_argp = &arg,
73c403a9 4168 .rpc_resp = &res,
4b580ee3 4169 };
21f498c2 4170 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4171 int ret, i;
4b580ee3
BF		 4172
4173 if (!nfs4_server_supports_acls(server))
4174 return -EOPNOTSUPP;
21f498c2
TM		 4175 if (npages > ARRAY_SIZE(pages))
4176 return -ERANGE;
e9e3d724
NH		 4177 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4178 if (i < 0)
4179 return i;
57ec14c5 4180 nfs4_inode_return_delegation(inode);
7c513058 4181 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4182
4183 /*
4184 * Free each page after tx, so the only ref left is
4185 * held by the network stack
4186 */
4187 for (; i > 0; i--)
4188 put_page(pages[i-1]);
4189
08a22b39
AK		 4190 /*
4191 * Acl update can result in inode attribute update.
4192 * so mark the attribute cache invalid.
4193 */
4194 spin_lock(&inode->i_lock);
4195 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4196 spin_unlock(&inode->i_lock);
f41f7418
TM		 4197 nfs_access_zap_cache(inode);
4198 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4199 return ret;
4200}
4201
16b4289c
TM		 4202static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4203{
4204 struct nfs4_exception exception = { };
4205 int err;
4206 do {
4207 err = nfs4_handle_exception(NFS_SERVER(inode),
4208 __nfs4_proc_set_acl(inode, buf, buflen),
4209 &exception);
4210 } while (exception.retry);
4211 return err;
4212}
4213
1da177e4 4214static int
aa5190d0 4215nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4216{
aa5190d0
TM		 4217 struct nfs_client *clp = server->nfs_client;
4218
4219 if (task->tk_status >= 0)
1da177e4
LT		 4220 return 0;
4221 switch(task->tk_status) {
a1d0b5ee 4222 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4223 case -NFS4ERR_ADMIN_REVOKED:
4224 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4225 if (state == NULL)
4226 break;
4227 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4228 case -NFS4ERR_OPENMODE:
4229 if (state == NULL)
4230 break;
5d422301
TM		 4231 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4232 goto stateid_invalid;
0400a6b0 4233 goto wait_on_recovery;
0ced63d1 4234 case -NFS4ERR_EXPIRED:
5d422301
TM		 4235 if (state != NULL) {
4236 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4237 goto stateid_invalid;
4238 }
1da177e4 4239 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4240 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4241 nfs4_schedule_lease_recovery(clp);
4242 goto wait_on_recovery;
4745e315
AA		 4243#if defined(CONFIG_NFS_V4_1)
4244 case -NFS4ERR_BADSESSION:
4245 case -NFS4ERR_BADSLOT:
4246 case -NFS4ERR_BAD_HIGH_SLOT:
4247 case -NFS4ERR_DEADSESSION:
4248 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4249 case -NFS4ERR_SEQ_FALSE_RETRY:
4250 case -NFS4ERR_SEQ_MISORDERED:
4251 dprintk("%s ERROR %d, Reset session\n", __func__,
4252 task->tk_status);
9f594791 4253 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4254 task->tk_status = 0;
4255 return -EAGAIN;
4256#endif /* CONFIG_NFS_V4_1 */
1da177e4 4257 case -NFS4ERR_DELAY:
aa5190d0 4258 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4259 case -NFS4ERR_GRACE:
1da177e4
LT		 4260 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4261 task->tk_status = 0;
4262 return -EAGAIN;
a8a4ae3a 4263 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4264 case -NFS4ERR_OLD_STATEID:
4265 task->tk_status = 0;
4266 return -EAGAIN;
4267 }
4268 task->tk_status = nfs4_map_errors(task->tk_status);
4269 return 0;
5d422301
TM		 4270stateid_invalid:
4271 task->tk_status = -EIO;
4272 return 0;
0400a6b0 4273wait_on_recovery:
a2c0b9e2 4274 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4275 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4276 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4277 task->tk_status = 0;
4278 return -EAGAIN;
1da177e4
LT		 4279}
4280
f092075d
CL		 4281static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4282 nfs4_verifier *bootverf)
cd93710e
CL		 4283{
4284 __be32 verf[2];
4285
2c820d9a
CL		 4286 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4287 /* An impossible timestamp guarantees this value
4288 * will never match a generated boot time. */
4289 verf[0] = 0;
4290 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4291 } else {
f092075d
CL		 4292 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4293 verf[0] = (__be32)nn->boot_time.tv_sec;
4294 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4295 }
cd93710e
CL		 4296 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4297}
4298
e984a55a
CL		 4299static unsigned int
4300nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4301 char *buf, size_t len)
4302{
4303 unsigned int result;
4304
4305 rcu_read_lock();
4306 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4307 clp->cl_ipaddr,
4308 rpc_peeraddr2str(clp->cl_rpcclient,
4309 RPC_DISPLAY_ADDR),
4310 rpc_peeraddr2str(clp->cl_rpcclient,
4311 RPC_DISPLAY_PROTO));
4312 rcu_read_unlock();
4313 return result;
4314}
4315
4316static unsigned int
4317nfs4_init_uniform_client_string(const struct nfs_client *clp,
4318 char *buf, size_t len)
4319{
6f2ea7f2
CL		 4320 char *nodename = clp->cl_rpcclient->cl_nodename;
4321
4322 if (nfs4_client_id_uniquifier[0] != '\0')
4323 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4324 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4325 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4326 nodename);
e984a55a
CL		 4327}
4328
6bbb4ae8
CL		 4329/**
4330 * nfs4_proc_setclientid - Negotiate client ID
4331 * @clp: state data structure
4332 * @program: RPC program for NFSv4 callback service
4333 * @port: IP port number for NFS4 callback service
4334 * @cred: RPC credential to use for this call
4335 * @res: where to place the result
4336 *
4337 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4338 */
bb8b27e5
TM		 4339int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4340 unsigned short port, struct rpc_cred *cred,
4341 struct nfs4_setclientid_res *res)
1da177e4
LT		 4342{
4343 nfs4_verifier sc_verifier;
4344 struct nfs4_setclientid setclientid = {
4345 .sc_verifier = &sc_verifier,
4346 .sc_prog = program,
f4eecd5d 4347 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4348 };
4349 struct rpc_message msg = {
4350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4351 .rpc_argp = &setclientid,
bb8b27e5 4352 .rpc_resp = res,
286d7d6a 4353 .rpc_cred = cred,
1da177e4 4354 };
6bbb4ae8 4355 int status;
1da177e4 4356
de734831 4357 /* nfs_client_id4 */
f092075d 4358 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4359 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4360 setclientid.sc_name_len =
4361 nfs4_init_uniform_client_string(clp,
4362 setclientid.sc_name,
4363 sizeof(setclientid.sc_name));
4364 else
4365 setclientid.sc_name_len =
4366 nfs4_init_nonuniform_client_string(clp,
4367 setclientid.sc_name,
4368 sizeof(setclientid.sc_name));
de734831 4369 /* cb_client4 */
e984a55a 4370 rcu_read_lock();
de734831 4371 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4372 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4373 rpc_peeraddr2str(clp->cl_rpcclient,
4374 RPC_DISPLAY_NETID));
de734831
CL		 4375 rcu_read_unlock();
4376 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4377 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4378 clp->cl_ipaddr, port >> 8, port & 255);
4379
6bbb4ae8
CL		 4380 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4381 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4382 setclientid.sc_name_len, setclientid.sc_name);
4383 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4384 dprintk("NFS reply setclientid: %d\n", status);
4385 return status;
1da177e4
LT		 4386}
4387
6bbb4ae8
CL		 4388/**
4389 * nfs4_proc_setclientid_confirm - Confirm client ID
4390 * @clp: state data structure
4391 * @res: result of a previous SETCLIENTID
4392 * @cred: RPC credential to use for this call
4393 *
4394 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4395 */
fd954ae1 4396int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4397 struct nfs4_setclientid_res *arg,
4398 struct rpc_cred *cred)
1da177e4 4399{
1da177e4
LT		 4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4402 .rpc_argp = arg,
286d7d6a 4403 .rpc_cred = cred,
1da177e4 4404 };
1da177e4
LT		 4405 int status;
4406
6bbb4ae8
CL		 4407 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4408 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4409 clp->cl_clientid);
1bd714f2 4410 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4411 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4412 return status;
4413}
4414
fe650407
TM		 4415struct nfs4_delegreturndata {
4416 struct nfs4_delegreturnargs args;
fa178f29 4417 struct nfs4_delegreturnres res;
fe650407
TM		 4418 struct nfs_fh fh;
4419 nfs4_stateid stateid;
26e976a8 4420 unsigned long timestamp;
fa178f29 4421 struct nfs_fattr fattr;
fe650407
TM		 4422 int rpc_status;
4423};
4424
fe650407
TM		 4425static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4426{
4427 struct nfs4_delegreturndata *data = calldata;
938e1010 4428
14516c3a
TM		 4429 if (!nfs4_sequence_done(task, &data->res.seq_res))
4430 return;
938e1010 4431
79708861
RL		 4432 switch (task->tk_status) {
4433 case -NFS4ERR_STALE_STATEID:
4434 case -NFS4ERR_EXPIRED:
4435 case 0:
fa178f29 4436 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4437 break;
4438 default:
4439 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4440 -EAGAIN) {
d00c5d43 4441 rpc_restart_call_prepare(task);
79708861
RL		 4442 return;
4443 }
4444 }
4445 data->rpc_status = task->tk_status;
fe650407
TM		 4446}
4447
4448static void nfs4_delegreturn_release(void *calldata)
4449{
fe650407
TM		 4450 kfree(calldata);
4451}
4452
938e1010
AA		 4453#if defined(CONFIG_NFS_V4_1)
4454static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4455{
4456 struct nfs4_delegreturndata *d_data;
4457
4458 d_data = (struct nfs4_delegreturndata *)data;
4459
d9afbd1b
TM		 4460 nfs4_setup_sequence(d_data->res.server,
4461 &d_data->args.seq_args,
4462 &d_data->res.seq_res,
4463 task);
938e1010
AA		 4464}
4465#endif /* CONFIG_NFS_V4_1 */
4466
c8d149f3 4467static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4468#if defined(CONFIG_NFS_V4_1)
4469 .rpc_call_prepare = nfs4_delegreturn_prepare,
4470#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4471 .rpc_call_done = nfs4_delegreturn_done,
4472 .rpc_release = nfs4_delegreturn_release,
4473};
4474
e6f81075 4475static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4476{
4477 struct nfs4_delegreturndata *data;
fa178f29 4478 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4479 struct rpc_task *task;
5138fde0
TM		 4480 struct rpc_message msg = {
4481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4482 .rpc_cred = cred,
4483 };
c970aa85
TM		 4484 struct rpc_task_setup task_setup_data = {
4485 .rpc_client = server->client,
5138fde0 4486 .rpc_message = &msg,
c970aa85
TM		 4487 .callback_ops = &nfs4_delegreturn_ops,
4488 .flags = RPC_TASK_ASYNC,
4489 };
e6f81075 4490 int status = 0;
fe650407 4491
8535b2be 4492 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4493 if (data == NULL)
4494 return -ENOMEM;
9d12b216 4495 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4496 data->args.fhandle = &data->fh;
4497 data->args.stateid = &data->stateid;
9e907fec 4498 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4499 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4500 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4501 data->res.fattr = &data->fattr;
4502 data->res.server = server;
5138fde0 4503 nfs_fattr_init(data->res.fattr);
26e976a8 4504 data->timestamp = jiffies;
fe650407
TM		 4505 data->rpc_status = 0;
4506
c970aa85 4507 task_setup_data.callback_data = data;
1174dd1f
TM		 4508 msg.rpc_argp = &data->args;
4509 msg.rpc_resp = &data->res;
c970aa85 4510 task = rpc_run_task(&task_setup_data);
7a1218a2 4511 if (IS_ERR(task))
fe650407 4512 return PTR_ERR(task);
e6f81075
TM		 4513 if (!issync)
4514 goto out;
fe650407 4515 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4516 if (status != 0)
4517 goto out;
4518 status = data->rpc_status;
e144cbcc
TM		 4519 if (status == 0)
4520 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4521 else
4522 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4523out:
e6b3c4db 4524 rpc_put_task(task);
fe650407 4525 return status;
1da177e4
LT		 4526}
4527
e6f81075 4528int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4529{
4530 struct nfs_server *server = NFS_SERVER(inode);
4531 struct nfs4_exception exception = { };
4532 int err;
4533 do {
e6f81075 4534 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4535 switch (err) {
4536 case -NFS4ERR_STALE_STATEID:
4537 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4538 case 0:
4539 return 0;
4540 }
4541 err = nfs4_handle_exception(server, err, &exception);
4542 } while (exception.retry);
4543 return err;
4544}
4545
4546#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4547#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4548
4549/*
4550 * sleep, with exponential backoff, and retry the LOCK operation.
4551 */
4552static unsigned long
4553nfs4_set_lock_task_retry(unsigned long timeout)
4554{
d310310c 4555 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4556 timeout <<= 1;
4557 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4558 return NFS4_LOCK_MAXTIMEOUT;
4559 return timeout;
4560}
4561
1da177e4
LT		 4562static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4563{
4564 struct inode *inode = state->inode;
4565 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4566 struct nfs_client *clp = server->nfs_client;
911d1aaf 4567 struct nfs_lockt_args arg = {
1da177e4 4568 .fh = NFS_FH(inode),
911d1aaf 4569 .fl = request,
1da177e4 4570 };
911d1aaf
TM		 4571 struct nfs_lockt_res res = {
4572 .denied = request,
1da177e4
LT		 4573 };
4574 struct rpc_message msg = {
4575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4576 .rpc_argp = &arg,
4577 .rpc_resp = &res,
4578 .rpc_cred = state->owner->so_cred,
4579 };
1da177e4
LT		 4580 struct nfs4_lock_state *lsp;
4581 int status;
4582
911d1aaf 4583 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4584 status = nfs4_set_lock_state(state, request);
4585 if (status != 0)
4586 goto out;
4587 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4588 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4589 arg.lock_owner.s_dev = server->s_dev;
7c513058 4590 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4591 switch (status) {
4592 case 0:
4593 request->fl_type = F_UNLCK;
4594 break;
4595 case -NFS4ERR_DENIED:
4596 status = 0;
1da177e4 4597 }
70cc6487 4598 request->fl_ops->fl_release_private(request);
8d0a8a9d 4599out:
1da177e4
LT		 4600 return status;
4601}
4602
4603static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4604{
4605 struct nfs4_exception exception = { };
4606 int err;
4607
4608 do {
4609 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4610 _nfs4_proc_getlk(state, cmd, request),
4611 &exception);
4612 } while (exception.retry);
4613 return err;
4614}
4615
4616static int do_vfs_lock(struct file *file, struct file_lock *fl)
4617{
4618 int res = 0;
4619 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4620 case FL_POSIX:
4621 res = posix_lock_file_wait(file, fl);
4622 break;
4623 case FL_FLOCK:
4624 res = flock_lock_file_wait(file, fl);
4625 break;
4626 default:
4627 BUG();
4628 }
1da177e4
LT		 4629 return res;
4630}
4631
faf5f49c 4632struct nfs4_unlockdata {
911d1aaf
TM		 4633 struct nfs_locku_args arg;
4634 struct nfs_locku_res res;
faf5f49c
TM		 4635 struct nfs4_lock_state *lsp;
4636 struct nfs_open_context *ctx;
911d1aaf
TM		 4637 struct file_lock fl;
4638 const struct nfs_server *server;
26e976a8 4639 unsigned long timestamp;
faf5f49c
TM		 4640};
4641
911d1aaf
TM		 4642static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4643 struct nfs_open_context *ctx,
4644 struct nfs4_lock_state *lsp,
4645 struct nfs_seqid *seqid)
4646{
4647 struct nfs4_unlockdata *p;
4648 struct inode *inode = lsp->ls_state->inode;
4649
8535b2be 4650 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4651 if (p == NULL)
4652 return NULL;
4653 p->arg.fh = NFS_FH(inode);
4654 p->arg.fl = &p->fl;
4655 p->arg.seqid = seqid;
c1d51931 4656 p->res.seqid = seqid;
911d1aaf
TM		 4657 p->arg.stateid = &lsp->ls_stateid;
4658 p->lsp = lsp;
4659 atomic_inc(&lsp->ls_count);
4660 /* Ensure we don't close file until we're done freeing locks! */
4661 p->ctx = get_nfs_open_context(ctx);
4662 memcpy(&p->fl, fl, sizeof(p->fl));
4663 p->server = NFS_SERVER(inode);
4664 return p;
4665}
4666
06f814a3 4667static void nfs4_locku_release_calldata(void *data)
faf5f49c 4668{
963d8fe5 4669 struct nfs4_unlockdata *calldata = data;
911d1aaf 4670 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4671 nfs4_put_lock_state(calldata->lsp);
4672 put_nfs_open_context(calldata->ctx);
4673 kfree(calldata);
faf5f49c
TM		 4674}
4675
963d8fe5 4676static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4677{
963d8fe5 4678 struct nfs4_unlockdata *calldata = data;
faf5f49c 4679
14516c3a
TM		 4680 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4681 return;
faf5f49c
TM		 4682 switch (task->tk_status) {
4683 case 0:
f597c537
TM		 4684 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4685 &calldata->res.stateid);
26e976a8 4686 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4687 break;
9e33bed5
TM		 4688 case -NFS4ERR_BAD_STATEID:
4689 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4690 case -NFS4ERR_STALE_STATEID:
4691 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4692 break;
4693 default:
9e33bed5 4694 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4695 rpc_restart_call_prepare(task);
faf5f49c 4696 }
2b1bc308 4697 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4698}
4699
4ce70ada 4700static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4701{
4ce70ada 4702 struct nfs4_unlockdata *calldata = data;
faf5f49c 4703
911d1aaf 4704 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4705 goto out_wait;
795a88c9 4706 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4707 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4708 goto out_no_action;
faf5f49c 4709 }
26e976a8 4710 calldata->timestamp = jiffies;
035168ab 4711 if (nfs4_setup_sequence(calldata->server,
a893693c 4712 &calldata->arg.seq_args,
2240a9e2
TM		 4713 &calldata->res.seq_res,
4714 task) != 0)
4715 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4716 return;
4717out_no_action:
4718 task->tk_action = NULL;
4719out_wait:
4720 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4721}
4722
963d8fe5 4723static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4724 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4725 .rpc_call_done = nfs4_locku_done,
06f814a3 4726 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4727};
4728
a5d16a4d
TM		 4729static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4730 struct nfs_open_context *ctx,
4731 struct nfs4_lock_state *lsp,
4732 struct nfs_seqid *seqid)
4733{
4734 struct nfs4_unlockdata *data;
5138fde0
TM		 4735 struct rpc_message msg = {
4736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4737 .rpc_cred = ctx->cred,
4738 };
c970aa85
TM		 4739 struct rpc_task_setup task_setup_data = {
4740 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4741 .rpc_message = &msg,
c970aa85 4742 .callback_ops = &nfs4_locku_ops,
101070ca 4743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4744 .flags = RPC_TASK_ASYNC,
4745 };
a5d16a4d 4746
137d6aca
FF		 4747 /* Ensure this is an unlock - when canceling a lock, the
4748 * canceled lock is passed in, and it won't be an unlock.
4749 */
4750 fl->fl_type = F_UNLCK;
4751
a5d16a4d
TM		 4752 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4753 if (data == NULL) {
4754 nfs_free_seqid(seqid);
4755 return ERR_PTR(-ENOMEM);
4756 }
4757
9d12b216 4758 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4759 msg.rpc_argp = &data->arg;
4760 msg.rpc_resp = &data->res;
c970aa85
TM		 4761 task_setup_data.callback_data = data;
4762 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4763}
4764
faf5f49c
TM		 4765static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4766{
65b62a29
TM		 4767 struct inode *inode = state->inode;
4768 struct nfs4_state_owner *sp = state->owner;
4769 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4770 struct nfs_seqid *seqid;
1da177e4 4771 struct nfs4_lock_state *lsp;
06f814a3
TM		 4772 struct rpc_task *task;
4773 int status = 0;
536ff0f8 4774 unsigned char fl_flags = request->fl_flags;
faf5f49c 4775
8d0a8a9d 4776 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4777 /* Unlock _before_ we do the RPC call */
4778 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4779 /* Exclude nfs_delegation_claim_locks() */
4780 mutex_lock(&sp->so_delegreturn_mutex);
4781 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4782 down_read(&nfsi->rwsem);
4783 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4784 up_read(&nfsi->rwsem);
65b62a29 4785 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4786 goto out;
19e03c57
TM		 4787 }
4788 up_read(&nfsi->rwsem);
65b62a29 4789 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4790 if (status != 0)
9b073574
TM		 4791 goto out;
4792 /* Is this a delegated lock? */
8d0a8a9d 4793 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4794 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4795 goto out;
8535b2be 4796 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4797 status = -ENOMEM;
911d1aaf 4798 if (seqid == NULL)
9b073574 4799 goto out;
cd3758e3 4800 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4801 status = PTR_ERR(task);
4802 if (IS_ERR(task))
9b073574 4803 goto out;
a5d16a4d 4804 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4805 rpc_put_task(task);
9b073574 4806out:
536ff0f8 4807 request->fl_flags = fl_flags;
1da177e4
LT		 4808 return status;
4809}
4810
a5d16a4d
TM		 4811struct nfs4_lockdata {
4812 struct nfs_lock_args arg;
4813 struct nfs_lock_res res;
4814 struct nfs4_lock_state *lsp;
4815 struct nfs_open_context *ctx;
4816 struct file_lock fl;
26e976a8 4817 unsigned long timestamp;
a5d16a4d
TM		 4818 int rpc_status;
4819 int cancelled;
66179efe 4820 struct nfs_server *server;
a5d16a4d
TM		 4821};
4822
4823static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4824 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4825 gfp_t gfp_mask)
1da177e4 4826{
a5d16a4d
TM		 4827 struct nfs4_lockdata *p;
4828 struct inode *inode = lsp->ls_state->inode;
1da177e4 4829 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4830
8535b2be 4831 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4832 if (p == NULL)
4833 return NULL;
4834
4835 p->arg.fh = NFS_FH(inode);
4836 p->arg.fl = &p->fl;
8535b2be 4837 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4838 if (p->arg.open_seqid == NULL)
4839 goto out_free;
8535b2be 4840 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4841 if (p->arg.lock_seqid == NULL)
2f74c0a0 4842 goto out_free_seqid;
a5d16a4d 4843 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4844 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4845 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4846 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4847 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4848 p->lsp = lsp;
66179efe 4849 p->server = server;
a5d16a4d
TM		 4850 atomic_inc(&lsp->ls_count);
4851 p->ctx = get_nfs_open_context(ctx);
4852 memcpy(&p->fl, fl, sizeof(p->fl));
4853 return p;
2f74c0a0
TM		 4854out_free_seqid:
4855 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4856out_free:
4857 kfree(p);
4858 return NULL;
4859}
4860
4861static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4862{
4863 struct nfs4_lockdata *data = calldata;
4864 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4865
3110ff80 4866 dprintk("%s: begin!\n", __func__);
2f74c0a0 4867 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4868 goto out_wait;
a5d16a4d
TM		 4869 /* Do we need to do an open_to_lock_owner? */
4870 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4871 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4872 goto out_release_lock_seqid;
8fe72bac 4873 }
8e472f33 4874 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4875 data->arg.new_lock_owner = 1;
c1d51931 4876 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4877 } else
4878 data->arg.new_lock_owner = 0;
5d422301
TM		 4879 if (!nfs4_valid_open_stateid(state)) {
4880 data->rpc_status = -EBADF;
4881 task->tk_action = NULL;
4882 goto out_release_open_seqid;
4883 }
26e976a8 4884 data->timestamp = jiffies;
035168ab
TM		 4885 if (nfs4_setup_sequence(data->server,
4886 &data->arg.seq_args,
2240a9e2 4887 &data->res.seq_res,
d9afbd1b 4888 task) == 0)
66179efe 4889 return;
5d422301 4890out_release_open_seqid:
2240a9e2
TM		 4891 nfs_release_seqid(data->arg.open_seqid);
4892out_release_lock_seqid:
4893 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4894out_wait:
4895 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4896 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4897}
4898
a5d16a4d
TM		 4899static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4900{
4901 struct nfs4_lockdata *data = calldata;
4902
3110ff80 4903 dprintk("%s: begin!\n", __func__);
a5d16a4d 4904
14516c3a
TM		 4905 if (!nfs4_sequence_done(task, &data->res.seq_res))
4906 return;
66179efe 4907
a5d16a4d 4908 data->rpc_status = task->tk_status;
a5d16a4d 4909 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4910 if (data->rpc_status == 0)
4911 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4912 else
4913 goto out;
4914 }
4915 if (data->rpc_status == 0) {
f597c537 4916 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4917 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4918 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4919 }
a5d16a4d 4920out:
3110ff80 4921 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4922}
4923
4924static void nfs4_lock_release(void *calldata)
4925{
4926 struct nfs4_lockdata *data = calldata;
4927
3110ff80 4928 dprintk("%s: begin!\n", __func__);
2f74c0a0 4929 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4930 if (data->cancelled != 0) {
4931 struct rpc_task *task;
4932 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4933 data->arg.lock_seqid);
4934 if (!IS_ERR(task))
bf294b41 4935 rpc_put_task_async(task);
3110ff80 4936 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4937 } else
4938 nfs_free_seqid(data->arg.lock_seqid);
4939 nfs4_put_lock_state(data->lsp);
4940 put_nfs_open_context(data->ctx);
4941 kfree(data);
3110ff80 4942 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4943}
4944
4945static const struct rpc_call_ops nfs4_lock_ops = {
4946 .rpc_call_prepare = nfs4_lock_prepare,
4947 .rpc_call_done = nfs4_lock_done,
4948 .rpc_release = nfs4_lock_release,
4949};
4950
2bee72a6
TM		 4951static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4952{
2bee72a6
TM		 4953 switch (error) {
4954 case -NFS4ERR_ADMIN_REVOKED:
4955 case -NFS4ERR_BAD_STATEID:
ecac799a 4956 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4957 if (new_lock_owner != 0 ||
795a88c9 4958 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4959 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4960 break;
4961 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4962 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4963 case -NFS4ERR_EXPIRED:
4964 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4965 };
4966}
4967
afe6c27c 4968static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4969{
4970 struct nfs4_lockdata *data;
4971 struct rpc_task *task;
5138fde0
TM		 4972 struct rpc_message msg = {
4973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4974 .rpc_cred = state->owner->so_cred,
4975 };
c970aa85
TM		 4976 struct rpc_task_setup task_setup_data = {
4977 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4978 .rpc_message = &msg,
c970aa85 4979 .callback_ops = &nfs4_lock_ops,
101070ca 4980 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4981 .flags = RPC_TASK_ASYNC,
4982 };
a5d16a4d
TM		 4983 int ret;
4984
3110ff80 4985 dprintk("%s: begin!\n", __func__);
cd3758e3 4986 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4987 fl->fl_u.nfs4_fl.owner,
4988 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4989 if (data == NULL)
4990 return -ENOMEM;
4991 if (IS_SETLKW(cmd))
4992 data->arg.block = 1;
9d12b216 4993 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4994 msg.rpc_argp = &data->arg;
4995 msg.rpc_resp = &data->res;
c970aa85 4996 task_setup_data.callback_data = data;
8fe72bac
TM		 4997 if (recovery_type > NFS_LOCK_NEW) {
4998 if (recovery_type == NFS_LOCK_RECLAIM)
4999 data->arg.reclaim = NFS_LOCK_RECLAIM;
5000 nfs4_set_sequence_privileged(&data->arg.seq_args);
5001 }
c970aa85 5002 task = rpc_run_task(&task_setup_data);
7a1218a2 5003 if (IS_ERR(task))
a5d16a4d 5004 return PTR_ERR(task);
a5d16a4d
TM		 5005 ret = nfs4_wait_for_completion_rpc_task(task);
5006 if (ret == 0) {
5007 ret = data->rpc_status;
2bee72a6
TM		 5008 if (ret)
5009 nfs4_handle_setlk_error(data->server, data->lsp,
5010 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5011 } else
5012 data->cancelled = 1;
e6b3c4db 5013 rpc_put_task(task);
3110ff80 5014 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5015 return ret;
1da177e4
LT		 5016}
5017
5018static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5019{
202b50dc 5020 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5021 struct nfs4_exception exception = {
5022 .inode = state->inode,
5023 };
202b50dc
TM		 5024 int err;
5025
5026 do {
42a2d13e
TM		 5027 /* Cache the lock if possible... */
5028 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5029 return 0;
afe6c27c 5030 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5031 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5032 break;
5033 nfs4_handle_exception(server, err, &exception);
5034 } while (exception.retry);
5035 return err;
1da177e4
LT		 5036}
5037
5038static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5039{
202b50dc 5040 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5041 struct nfs4_exception exception = {
5042 .inode = state->inode,
5043 };
202b50dc
TM		 5044 int err;
5045
6bfc93ef
TM		 5046 err = nfs4_set_lock_state(state, request);
5047 if (err != 0)
5048 return err;
202b50dc 5049 do {
42a2d13e
TM		 5050 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5051 return 0;
afe6c27c 5052 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5053 switch (err) {
5054 default:
5055 goto out;
5056 case -NFS4ERR_GRACE:
5057 case -NFS4ERR_DELAY:
5058 nfs4_handle_exception(server, err, &exception);
5059 err = 0;
5060 }
202b50dc 5061 } while (exception.retry);
a9ed2e25 5062out:
202b50dc 5063 return err;
1da177e4
LT		 5064}
5065
f062eb6c 5066#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5067/**
5068 * nfs41_check_expired_locks - possibly free a lock stateid
5069 *
5070 * @state: NFSv4 state for an inode
5071 *
5072 * Returns NFS_OK if recovery for this stateid is now finished.
5073 * Otherwise a negative NFS4ERR value is returned.
5074 */
b01dd1d8 5075static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5076{
eb64cf96 5077 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5078 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5079 struct nfs_server *server = NFS_SERVER(state->inode);
5080
b01dd1d8 5081 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5082 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5083 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5084
5085 status = nfs41_test_stateid(server,
5086 &lsp->ls_stateid,
5087 cred);
b01dd1d8 5088 if (status != NFS_OK) {
3e60ffdd
CL		 5089 /* Free the stateid unless the server
5090 * informs us the stateid is unrecognized. */
89af2739
CL		 5091 if (status != -NFS4ERR_BAD_STATEID)
5092 nfs41_free_stateid(server,
ab7cb0df
TM		 5093 &lsp->ls_stateid,
5094 cred);
795a88c9 5095 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5096 ret = status;
5097 }
5098 }
5099 };
5100
5101 return ret;
5102}
5103
5104static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5105{
5106 int status = NFS_OK;
5107
5108 if (test_bit(LK_STATE_IN_USE, &state->flags))
5109 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5110 if (status != NFS_OK)
5111 status = nfs4_lock_expired(state, request);
5112 return status;
f062eb6c
BS		 5113}
5114#endif
5115
1da177e4
LT		 5116static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5117{
9a99af49 5118 struct nfs4_state_owner *sp = state->owner;
19e03c57 5119 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5120 unsigned char fl_flags = request->fl_flags;
9a99af49 5121 unsigned int seq;
8e469ebd 5122 int status = -ENOLCK;
1da177e4 5123
8e469ebd
TM		 5124 if ((fl_flags & FL_POSIX) &&
5125 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5126 goto out;
6bfc93ef 5127 /* Is this a delegated open? */
6bfc93ef
TM		 5128 status = nfs4_set_lock_state(state, request);
5129 if (status != 0)
5130 goto out;
01c3b861
TM		 5131 request->fl_flags |= FL_ACCESS;
5132 status = do_vfs_lock(request->fl_file, request);
5133 if (status < 0)
5134 goto out;
19e03c57 5135 down_read(&nfsi->rwsem);
01c3b861 5136 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5137 /* Yes: cache locks! */
01c3b861 5138 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5139 request->fl_flags = fl_flags & ~FL_SLEEP;
5140 status = do_vfs_lock(request->fl_file, request);
5141 goto out_unlock;
01c3b861 5142 }
9a99af49
TM		 5143 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5144 up_read(&nfsi->rwsem);
afe6c27c 5145 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5146 if (status != 0)
9a99af49
TM		 5147 goto out;
5148 down_read(&nfsi->rwsem);
5149 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5150 status = -NFS4ERR_DELAY;
01c3b861 5151 goto out_unlock;
9a99af49 5152 }
6bfc93ef 5153 /* Note: we always want to sleep here! */
01c3b861 5154 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5155 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5156 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5157 "manager!\n", __func__);
01c3b861 5158out_unlock:
19e03c57 5159 up_read(&nfsi->rwsem);
01c3b861
TM		 5160out:
5161 request->fl_flags = fl_flags;
1da177e4
LT		 5162 return status;
5163}
5164
5165static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5166{
a1d0b5ee
TM		 5167 struct nfs4_exception exception = {
5168 .state = state,
05ffe24f 5169 .inode = state->inode,
a1d0b5ee 5170 };
1da177e4
LT		 5171 int err;
5172
5173 do {
965b5d67
TM		 5174 err = _nfs4_proc_setlk(state, cmd, request);
5175 if (err == -NFS4ERR_DENIED)
5176 err = -EAGAIN;
1da177e4 5177 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5178 err, &exception);
1da177e4
LT		 5179 } while (exception.retry);
5180 return err;
5181}
5182
5183static int
5184nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5185{
5186 struct nfs_open_context *ctx;
5187 struct nfs4_state *state;
5188 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5189 int status;
5190
5191 /* verify open state */
cd3758e3 5192 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5193 state = ctx->state;
5194
5195 if (request->fl_start < 0 || request->fl_end < 0)
5196 return -EINVAL;
5197
d953126a
TM		 5198 if (IS_GETLK(cmd)) {
5199 if (state != NULL)
5200 return nfs4_proc_getlk(state, F_GETLK, request);
5201 return 0;
5202 }
1da177e4
LT		 5203
5204 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5205 return -EINVAL;
5206
d953126a
TM		 5207 if (request->fl_type == F_UNLCK) {
5208 if (state != NULL)
5209 return nfs4_proc_unlck(state, cmd, request);
5210 return 0;
5211 }
1da177e4 5212
d953126a
TM		 5213 if (state == NULL)
5214 return -ENOLCK;
55725513
TM		 5215 /*
5216 * Don't rely on the VFS having checked the file open mode,
5217 * since it won't do this for flock() locks.
5218 */
f44106e2 5219 switch (request->fl_type) {
55725513
TM		 5220 case F_RDLCK:
5221 if (!(filp->f_mode & FMODE_READ))
5222 return -EBADF;
5223 break;
5224 case F_WRLCK:
5225 if (!(filp->f_mode & FMODE_WRITE))
5226 return -EBADF;
5227 }
5228
1da177e4
LT		 5229 do {
5230 status = nfs4_proc_setlk(state, cmd, request);
5231 if ((status != -EAGAIN) || IS_SETLK(cmd))
5232 break;
5233 timeout = nfs4_set_lock_task_retry(timeout);
5234 status = -ERESTARTSYS;
5235 if (signalled())
5236 break;
5237 } while(status < 0);
1da177e4
LT		 5238 return status;
5239}
5240
db4f2e63 5241int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5242{
5243 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5244 int err;
5245
5246 err = nfs4_set_lock_state(state, fl);
5247 if (err != 0)
db4f2e63 5248 return err;
4a706fa0 5249 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5250 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5251}
6b3b5496 5252
cf470c3e
TM		 5253struct nfs_release_lockowner_data {
5254 struct nfs4_lock_state *lsp;
5ae67c4f 5255 struct nfs_server *server;
cf470c3e
TM		 5256 struct nfs_release_lockowner_args args;
5257};
5258
d3c7b7cc
TM		 5259static void nfs4_release_lockowner_release(void *calldata)
5260{
cf470c3e 5261 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5262 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5263 kfree(calldata);
5264}
5265
17280175 5266static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5267 .rpc_release = nfs4_release_lockowner_release,
5268};
5269
c8b2d0bf 5270static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5271{
cf470c3e 5272 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5273 struct rpc_message msg = {
5274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5275 };
5276
5277 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5278 return -EINVAL;
5279 data = kmalloc(sizeof(*data), GFP_NOFS);
5280 if (!data)
5281 return -ENOMEM;
5282 data->lsp = lsp;
5ae67c4f 5283 data->server = server;
cf470c3e
TM		 5284 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5285 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5286 data->args.lock_owner.s_dev = server->s_dev;
5287 msg.rpc_argp = &data->args;
5288 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5289 return 0;
d3c7b7cc
TM		 5290}
5291
aa1870af
BF		 5292#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5293
64c2ce8b
AK		 5294static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5295 const void *buf, size_t buflen,
5296 int flags, int type)
6b3b5496 5297{
64c2ce8b
AK		 5298 if (strcmp(key, "") != 0)
5299 return -EINVAL;
4b580ee3 5300
64c2ce8b 5301 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5302}
5303
64c2ce8b
AK		 5304static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5305 void *buf, size_t buflen, int type)
6b3b5496 5306{
64c2ce8b
AK		 5307 if (strcmp(key, "") != 0)
5308 return -EINVAL;
aa1870af 5309
64c2ce8b 5310 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5311}
5312
64c2ce8b
AK		 5313static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5314 size_t list_len, const char *name,
5315 size_t name_len, int type)
6b3b5496 5316{
64c2ce8b 5317 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5318
096455a2
BF		 5319 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5320 return 0;
64c2ce8b
AK		 5321
5322 if (list && len <= list_len)
5323 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5324 return len;
6b3b5496
BF		 5325}
5326
533eb461
AA		 5327/*
5328 * nfs_fhget will use either the mounted_on_fileid or the fileid
5329 */
69aaaae1
TM		 5330static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5331{
533eb461
AA		 5332 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5333 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5334 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5335 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5336 return;
5337
5338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5341 fattr->nlink = 2;
5342}
5343
f05d147f
BS		 5344static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5345 const struct qstr *name,
5346 struct nfs4_fs_locations *fs_locations,
5347 struct page *page)
683b57b4
TM		 5348{
5349 struct nfs_server *server = NFS_SERVER(dir);
5350 u32 bitmask[2] = {
361e624f 5351 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5352 };
5353 struct nfs4_fs_locations_arg args = {
5354 .dir_fh = NFS_FH(dir),
c228fd3a 5355 .name = name,
683b57b4
TM		 5356 .page = page,
5357 .bitmask = bitmask,
5358 };
22958463
BH		 5359 struct nfs4_fs_locations_res res = {
5360 .fs_locations = fs_locations,
5361 };
683b57b4
TM		 5362 struct rpc_message msg = {
5363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5364 .rpc_argp = &args,
22958463 5365 .rpc_resp = &res,
683b57b4
TM		 5366 };
5367 int status;
5368
3110ff80 5369 dprintk("%s: start\n", __func__);
533eb461
AA		 5370
5371 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5372 * is not supported */
5373 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5374 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5375 else
5376 bitmask[0] |= FATTR4_WORD0_FILEID;
5377
c228fd3a 5378 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5379 fs_locations->server = server;
830b8e33 5380 fs_locations->nlocations = 0;
f05d147f 5381 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5382 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5383 return status;
5384}
5385
f05d147f
BS		 5386int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5387 const struct qstr *name,
5388 struct nfs4_fs_locations *fs_locations,
5389 struct page *page)
db0a9593
BS		 5390{
5391 struct nfs4_exception exception = { };
5392 int err;
5393 do {
5394 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5395 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5396 &exception);
5397 } while (exception.retry);
5398 return err;
5399}
5400
5a5ea0d4
BS		 5401static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5402{
5403 int status;
5404 struct nfs4_secinfo_arg args = {
5405 .dir_fh = NFS_FH(dir),
5406 .name = name,
5407 };
5408 struct nfs4_secinfo_res res = {
5409 .flavors = flavors,
5410 };
5411 struct rpc_message msg = {
5412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5413 .rpc_argp = &args,
5414 .rpc_resp = &res,
5415 };
5416
5417 dprintk("NFS call secinfo %s\n", name->name);
5418 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5419 dprintk("NFS reply secinfo: %d\n", status);
5420 return status;
5421}
5422
72de53ec
BS		 5423int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5424 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5425{
5426 struct nfs4_exception exception = { };
5427 int err;
5428 do {
5429 err = nfs4_handle_exception(NFS_SERVER(dir),
5430 _nfs4_proc_secinfo(dir, name, flavors),
5431 &exception);
5432 } while (exception.retry);
5433 return err;
5434}
5435
557134a3 5436#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5437/*
5438 * Check the exchange flags returned by the server for invalid flags, having
5439 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5440 * DS flags set.
5441 */
5442static int nfs4_check_cl_exchange_flags(u32 flags)
5443{
5444 if (flags & ~EXCHGID4_FLAG_MASK_R)
5445 goto out_inval;
5446 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5447 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5448 goto out_inval;
5449 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5450 goto out_inval;
5451 return NFS_OK;
5452out_inval:
5453 return -NFS4ERR_INVAL;
5454}
5455
78fe0f41 5456static bool
79d4e1f0
CL		 5457nfs41_same_server_scope(struct nfs41_server_scope *a,
5458 struct nfs41_server_scope *b)
78fe0f41
WAA		 5459{
5460 if (a->server_scope_sz == b->server_scope_sz &&
5461 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5462 return true;
5463
5464 return false;
5465}
5466
7c44f1ae
WAA		 5467/*
5468 * nfs4_proc_bind_conn_to_session()
5469 *
5470 * The 4.1 client currently uses the same TCP connection for the
5471 * fore and backchannel.
5472 */
2cf047c9 5473int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5474{
5475 int status;
5476 struct nfs41_bind_conn_to_session_res res;
5477 struct rpc_message msg = {
5478 .rpc_proc =
5479 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5480 .rpc_argp = clp,
5481 .rpc_resp = &res,
2cf047c9 5482 .rpc_cred = cred,
7c44f1ae
WAA		 5483 };
5484
5485 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5486
5487 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5488 if (unlikely(res.session == NULL)) {
5489 status = -ENOMEM;
5490 goto out;
5491 }
5492
5493 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5494 if (status == 0) {
5495 if (memcmp(res.session->sess_id.data,
5496 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5497 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5498 status = -EIO;
5499 goto out_session;
5500 }
5501 if (res.dir != NFS4_CDFS4_BOTH) {
5502 dprintk("NFS: %s: Unexpected direction from server\n",
5503 __func__);
5504 status = -EIO;
5505 goto out_session;
5506 }
5507 if (res.use_conn_in_rdma_mode) {
5508 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5509 __func__);
5510 status = -EIO;
5511 goto out_session;
5512 }
5513 }
5514out_session:
5515 kfree(res.session);
5516out:
5517 dprintk("<-- %s status= %d\n", __func__, status);
5518 return status;
5519}
5520
99fe60d0
BH		 5521/*
5522 * nfs4_proc_exchange_id()
5523 *
6bbb4ae8
CL		 5524 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5525 *
99fe60d0
BH		 5526 * Since the clientid has expired, all compounds using sessions
5527 * associated with the stale clientid will be returning
5528 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5529 * be in some phase of session reset.
5530 */
4d643d1d 5531int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5532{
5533 nfs4_verifier verifier;
5534 struct nfs41_exchange_id_args args = {
cd93710e 5535 .verifier = &verifier,
99fe60d0 5536 .client = clp,
4f0b429d
TM		 5537 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5538 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5539 };
5540 struct nfs41_exchange_id_res res = {
32b01310 5541 0
99fe60d0
BH		 5542 };
5543 int status;
5544 struct rpc_message msg = {
5545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5546 .rpc_argp = &args,
5547 .rpc_resp = &res,
5548 .rpc_cred = cred,
5549 };
99fe60d0 5550
f092075d 5551 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5552 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5553 sizeof(args.id));
6bbb4ae8
CL		 5554 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5555 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5556 args.id_len, args.id);
99fe60d0 5557
acdeb69d 5558 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5559 GFP_NOFS);
acdeb69d 5560 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5561 status = -ENOMEM;
5562 goto out;
5563 }
78fe0f41 5564
79d4e1f0 5565 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5566 GFP_NOFS);
177313f1 5567 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5568 status = -ENOMEM;
acdeb69d 5569 goto out_server_owner;
abe9a6d5 5570 }
78fe0f41 5571
bbafffd2 5572 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5573 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5574 status = -ENOMEM;
5575 goto out_server_scope;
5576 }
5577
1bd714f2 5578 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5579 if (status == 0)
32b01310 5580 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5581
acdeb69d 5582 if (status == 0) {
32b01310
TM		 5583 clp->cl_clientid = res.clientid;
5584 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5585 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5586 clp->cl_seqid = res.seqid;
5587
acdeb69d
CL		 5588 kfree(clp->cl_serverowner);
5589 clp->cl_serverowner = res.server_owner;
5590 res.server_owner = NULL;
78fe0f41 5591
7d2ed9ac 5592 /* use the most recent implementation id */
59155546
CL		 5593 kfree(clp->cl_implid);
5594 clp->cl_implid = res.impl_id;
7d2ed9ac 5595
177313f1 5596 if (clp->cl_serverscope != NULL &&
79d4e1f0 5597 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5598 res.server_scope)) {
5599 dprintk("%s: server_scope mismatch detected\n",
5600 __func__);
5601 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5602 kfree(clp->cl_serverscope);
5603 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5604 }
5605
177313f1 5606 if (clp->cl_serverscope == NULL) {
79d4e1f0 5607 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5608 goto out;
5609 }
32b01310
TM		 5610 } else
5611 kfree(res.impl_id);
7d2ed9ac 5612
acdeb69d
CL		 5613out_server_owner:
5614 kfree(res.server_owner);
7d2ed9ac 5615out_server_scope:
abe9a6d5
WAA		 5616 kfree(res.server_scope);
5617out:
177313f1 5618 if (clp->cl_implid != NULL)
6bbb4ae8 5619 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5620 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5621 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5622 clp->cl_implid->date.seconds,
5623 clp->cl_implid->date.nseconds);
6bbb4ae8 5624 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5625 return status;
5626}
5627
66245539
TM		 5628static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5629 struct rpc_cred *cred)
5630{
5631 struct rpc_message msg = {
5632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5633 .rpc_argp = clp,
5634 .rpc_cred = cred,
5635 };
5636 int status;
5637
5638 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5639 if (status)
02c67525 5640 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5641 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5642 return status;
5643}
5644
5645static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5646 struct rpc_cred *cred)
5647{
5648 unsigned int loop;
5649 int ret;
5650
5651 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5652 ret = _nfs4_proc_destroy_clientid(clp, cred);
5653 switch (ret) {
5654 case -NFS4ERR_DELAY:
5655 case -NFS4ERR_CLIENTID_BUSY:
5656 ssleep(1);
5657 break;
5658 default:
5659 return ret;
5660 }
5661 }
5662 return 0;
5663}
5664
5665int nfs4_destroy_clientid(struct nfs_client *clp)
5666{
5667 struct rpc_cred *cred;
5668 int ret = 0;
5669
5670 if (clp->cl_mvops->minor_version < 1)
5671 goto out;
5672 if (clp->cl_exchange_flags == 0)
5673 goto out;
05f4c350
CL		 5674 if (clp->cl_preserve_clid)
5675 goto out;
66245539
TM		 5676 cred = nfs4_get_exchange_id_cred(clp);
5677 ret = nfs4_proc_destroy_clientid(clp, cred);
5678 if (cred)
5679 put_rpccred(cred);
5680 switch (ret) {
5681 case 0:
5682 case -NFS4ERR_STALE_CLIENTID:
5683 clp->cl_exchange_flags = 0;
5684 }
5685out:
5686 return ret;
5687}
5688
2050f0cc
AA		 5689struct nfs4_get_lease_time_data {
5690 struct nfs4_get_lease_time_args *args;
5691 struct nfs4_get_lease_time_res *res;
5692 struct nfs_client *clp;
5693};
5694
5695static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5696 void *calldata)
5697{
2050f0cc
AA		 5698 struct nfs4_get_lease_time_data *data =
5699 (struct nfs4_get_lease_time_data *)calldata;
5700
5701 dprintk("--> %s\n", __func__);
5702 /* just setup sequence, do not trigger session recovery
5703 since we're invoked within one */
d9afbd1b
TM		 5704 nfs41_setup_sequence(data->clp->cl_session,
5705 &data->args->la_seq_args,
5706 &data->res->lr_seq_res,
5707 task);
2050f0cc
AA		 5708 dprintk("<-- %s\n", __func__);
5709}
5710
5711/*
5712 * Called from nfs4_state_manager thread for session setup, so don't recover
5713 * from sequence operation or clientid errors.
5714 */
5715static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5716{
5717 struct nfs4_get_lease_time_data *data =
5718 (struct nfs4_get_lease_time_data *)calldata;
5719
5720 dprintk("--> %s\n", __func__);
14516c3a
TM		 5721 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5722 return;
2050f0cc
AA		 5723 switch (task->tk_status) {
5724 case -NFS4ERR_DELAY:
5725 case -NFS4ERR_GRACE:
5726 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5727 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5728 task->tk_status = 0;
a8a4ae3a
AA		 5729 /* fall through */
5730 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5731 rpc_restart_call_prepare(task);
2050f0cc
AA		 5732 return;
5733 }
2050f0cc
AA		 5734 dprintk("<-- %s\n", __func__);
5735}
5736
17280175 5737static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5738 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5739 .rpc_call_done = nfs4_get_lease_time_done,
5740};
5741
5742int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5743{
5744 struct rpc_task *task;
5745 struct nfs4_get_lease_time_args args;
5746 struct nfs4_get_lease_time_res res = {
5747 .lr_fsinfo = fsinfo,
5748 };
5749 struct nfs4_get_lease_time_data data = {
5750 .args = &args,
5751 .res = &res,
5752 .clp = clp,
5753 };
5754 struct rpc_message msg = {
5755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5756 .rpc_argp = &args,
5757 .rpc_resp = &res,
5758 };
5759 struct rpc_task_setup task_setup = {
5760 .rpc_client = clp->cl_rpcclient,
5761 .rpc_message = &msg,
5762 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5763 .callback_data = &data,
5764 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5765 };
5766 int status;
5767
9d12b216 5768 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5769 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5770 dprintk("--> %s\n", __func__);
5771 task = rpc_run_task(&task_setup);
5772
5773 if (IS_ERR(task))
5774 status = PTR_ERR(task);
5775 else {
5776 status = task->tk_status;
5777 rpc_put_task(task);
5778 }
5779 dprintk("<-- %s return %d\n", __func__, status);
5780
5781 return status;
5782}
5783
fc931582
AA		 5784/*
5785 * Initialize the values to be used by the client in CREATE_SESSION
5786 * If nfs4_init_session set the fore channel request and response sizes,
5787 * use them.
5788 *
5789 * Set the back channel max_resp_sz_cached to zero to force the client to
5790 * always set csa_cachethis to FALSE because the current implementation
5791 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5792 */
5793static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5794{
5795 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5796 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5797 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5798
5799 if (mxrqst_sz == 0)
5800 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5801 if (mxresp_sz == 0)
5802 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5803 /* Fore channel attributes */
fc931582
AA		 5804 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5805 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5806 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5807 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5808
5809 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5810 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5811 __func__,
5812 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5813 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5814
5815 /* Back channel attributes */
fc931582
AA		 5816 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5817 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5818 args->bc_attrs.max_resp_sz_cached = 0;
5819 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5820 args->bc_attrs.max_reqs = 1;
5821
5822 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5823 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5824 __func__,
5825 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5826 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5827 args->bc_attrs.max_reqs);
5828}
5829
43c2e885 5830static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5831{
43c2e885
BF		 5832 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5833 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5834
43c2e885
BF		 5835 if (rcvd->max_resp_sz > sent->max_resp_sz)
5836 return -EINVAL;
5837 /*
5838 * Our requested max_ops is the minimum we need; we're not
5839 * prepared to break up compounds into smaller pieces than that.
5840 * So, no point even trying to continue if the server won't
5841 * cooperate:
5842 */
5843 if (rcvd->max_ops < sent->max_ops)
5844 return -EINVAL;
5845 if (rcvd->max_reqs == 0)
5846 return -EINVAL;
b4b9a0c1
VG		 5847 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5848 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5849 return 0;
8d35301d
AA		 5850}
5851
43c2e885
BF		 5852static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5853{
5854 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5855 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5856
43c2e885
BF		 5857 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5858 return -EINVAL;
5859 if (rcvd->max_resp_sz < sent->max_resp_sz)
5860 return -EINVAL;
5861 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5862 return -EINVAL;
5863 /* These would render the backchannel useless: */
b4b9a0c1 5864 if (rcvd->max_ops != sent->max_ops)
43c2e885 5865 return -EINVAL;
b4b9a0c1 5866 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5867 return -EINVAL;
5868 return 0;
5869}
8d35301d 5870
8d35301d
AA		 5871static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5872 struct nfs4_session *session)
5873{
43c2e885 5874 int ret;
8d35301d 5875
43c2e885
BF		 5876 ret = nfs4_verify_fore_channel_attrs(args, session);
5877 if (ret)
5878 return ret;
5879 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5880}
5881
848f5bda
TM		 5882static int _nfs4_proc_create_session(struct nfs_client *clp,
5883 struct rpc_cred *cred)
fc931582
AA		 5884{
5885 struct nfs4_session *session = clp->cl_session;
5886 struct nfs41_create_session_args args = {
5887 .client = clp,
5888 .cb_program = NFS4_CALLBACK,
5889 };
5890 struct nfs41_create_session_res res = {
5891 .client = clp,
5892 };
5893 struct rpc_message msg = {
5894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5895 .rpc_argp = &args,
5896 .rpc_resp = &res,
848f5bda 5897 .rpc_cred = cred,
fc931582
AA		 5898 };
5899 int status;
5900
5901 nfs4_init_channel_attrs(&args);
0f91421e 5902 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5903
1bd714f2 5904 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5905
43095d39 5906 if (!status) {
8d35301d
AA		 5907 /* Verify the session's negotiated channel_attrs values */
5908 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5909 /* Increment the clientid slot sequence id */
5910 clp->cl_seqid++;
5911 }
5912
5913 return status;
5914}
5915
5916/*
5917 * Issues a CREATE_SESSION operation to the server.
5918 * It is the responsibility of the caller to verify the session is
5919 * expired before calling this routine.
5920 */
848f5bda 5921int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5922{
5923 int status;
5924 unsigned *ptr;
fc931582
AA		 5925 struct nfs4_session *session = clp->cl_session;
5926
5927 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5928
848f5bda 5929 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5930 if (status)
5931 goto out;
5932
aacd5537
AA		 5933 /* Init or reset the session slot tables */
5934 status = nfs4_setup_session_slot_tables(session);
5935 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5936 if (status)
5937 goto out;
5938
5939 ptr = (unsigned *)&session->sess_id.data[0];
5940 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5941 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5942out:
5943 dprintk("<-- %s\n", __func__);
5944 return status;
5945}
5946
0f3e66c6
AA		 5947/*
5948 * Issue the over-the-wire RPC DESTROY_SESSION.
5949 * The caller must serialize access to this routine.
5950 */
848f5bda
TM		 5951int nfs4_proc_destroy_session(struct nfs4_session *session,
5952 struct rpc_cred *cred)
0f3e66c6 5953{
848f5bda
TM		 5954 struct rpc_message msg = {
5955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5956 .rpc_argp = session,
5957 .rpc_cred = cred,
5958 };
0f3e66c6 5959 int status = 0;
0f3e66c6
AA		 5960
5961 dprintk("--> nfs4_proc_destroy_session\n");
5962
5963 /* session is still being setup */
5964 if (session->clp->cl_cons_state != NFS_CS_READY)
5965 return status;
5966
1bd714f2 5967 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5968
5969 if (status)
08106ac7 5970 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5971 "Session has been destroyed regardless...\n", status);
5972
5973 dprintk("<-- nfs4_proc_destroy_session\n");
5974 return status;
5975}
5976
fc01cea9
AA		 5977/*
5978 * Renew the cl_session lease.
5979 */
d5f8d3fe
TM		 5980struct nfs4_sequence_data {
5981 struct nfs_client *clp;
5982 struct nfs4_sequence_args args;
5983 struct nfs4_sequence_res res;
5984};
5985
dc96aef9
AB		 5986static void nfs41_sequence_release(void *data)
5987{
d5f8d3fe
TM		 5988 struct nfs4_sequence_data *calldata = data;
5989 struct nfs_client *clp = calldata->clp;
dc96aef9 5990
7135840f
AB		 5991 if (atomic_read(&clp->cl_count) > 1)
5992 nfs4_schedule_state_renewal(clp);
5993 nfs_put_client(clp);
d5f8d3fe 5994 kfree(calldata);
dc96aef9
AB		 5995}
5996
aa5190d0
TM		 5997static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5998{
5999 switch(task->tk_status) {
6000 case -NFS4ERR_DELAY:
aa5190d0
TM		 6001 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6002 return -EAGAIN;
6003 default:
0400a6b0 6004 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6005 }
6006 return 0;
6007}
6008
dc96aef9 6009static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6010{
d5f8d3fe
TM		 6011 struct nfs4_sequence_data *calldata = data;
6012 struct nfs_client *clp = calldata->clp;
fc01cea9 6013
14516c3a
TM		 6014 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6015 return;
fc01cea9
AA		 6016
6017 if (task->tk_status < 0) {
6018 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6019 if (atomic_read(&clp->cl_count) == 1)
6020 goto out;
fc01cea9 6021
aa5190d0
TM		 6022 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6023 rpc_restart_call_prepare(task);
fc01cea9
AA		 6024 return;
6025 }
6026 }
fc01cea9 6027 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6028out:
fc01cea9
AA		 6029 dprintk("<-- %s\n", __func__);
6030}
6031
6032static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6033{
d5f8d3fe
TM		 6034 struct nfs4_sequence_data *calldata = data;
6035 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6036 struct nfs4_sequence_args *args;
6037 struct nfs4_sequence_res *res;
6038
fc01cea9
AA		 6039 args = task->tk_msg.rpc_argp;
6040 res = task->tk_msg.rpc_resp;
6041
d9afbd1b 6042 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6043}
6044
6045static const struct rpc_call_ops nfs41_sequence_ops = {
6046 .rpc_call_done = nfs41_sequence_call_done,
6047 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6048 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6049};
6050
8fe72bac
TM		 6051static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6052 struct rpc_cred *cred,
6053 bool is_privileged)
fc01cea9 6054{
d5f8d3fe 6055 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6056 struct rpc_message msg = {
6057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6058 .rpc_cred = cred,
6059 };
71ac6da9
TM		 6060 struct rpc_task_setup task_setup_data = {
6061 .rpc_client = clp->cl_rpcclient,
6062 .rpc_message = &msg,
8fe72bac 6063 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6064 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6065 };
fc01cea9 6066
7135840f 6067 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6068 return ERR_PTR(-EIO);
dfb4f309 6069 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6070 if (calldata == NULL) {
7135840f 6071 nfs_put_client(clp);
71ac6da9 6072 return ERR_PTR(-ENOMEM);
fc01cea9 6073 }
9d12b216 6074 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6075 if (is_privileged)
6076 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6077 msg.rpc_argp = &calldata->args;
6078 msg.rpc_resp = &calldata->res;
6079 calldata->clp = clp;
71ac6da9 6080 task_setup_data.callback_data = calldata;
fc01cea9 6081
71ac6da9
TM		 6082 return rpc_run_task(&task_setup_data);
6083}
6084
2f60ea6b 6085static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6086{
6087 struct rpc_task *task;
6088 int ret = 0;
6089
2f60ea6b
TM		 6090 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6091 return 0;
8fe72bac 6092 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6093 if (IS_ERR(task))
6094 ret = PTR_ERR(task);
6095 else
bf294b41 6096 rpc_put_task_async(task);
71ac6da9
TM		 6097 dprintk("<-- %s status=%d\n", __func__, ret);
6098 return ret;
6099}
6100
6101static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6102{
6103 struct rpc_task *task;
6104 int ret;
6105
8fe72bac 6106 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6107 if (IS_ERR(task)) {
6108 ret = PTR_ERR(task);
6109 goto out;
6110 }
6111 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6112 if (!ret) {
6113 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6114
6115 if (task->tk_status == 0)
6116 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6117 ret = task->tk_status;
b4410c2f 6118 }
71ac6da9
TM		 6119 rpc_put_task(task);
6120out:
6121 dprintk("<-- %s status=%d\n", __func__, ret);
6122 return ret;
fc01cea9
AA		 6123}
6124
fce5c838
RL		 6125struct nfs4_reclaim_complete_data {
6126 struct nfs_client *clp;
6127 struct nfs41_reclaim_complete_args arg;
6128 struct nfs41_reclaim_complete_res res;
6129};
6130
6131static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6132{
6133 struct nfs4_reclaim_complete_data *calldata = data;
6134
d9afbd1b
TM		 6135 nfs41_setup_sequence(calldata->clp->cl_session,
6136 &calldata->arg.seq_args,
6137 &calldata->res.seq_res,
6138 task);
fce5c838
RL		 6139}
6140
aa5190d0
TM		 6141static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6142{
6143 switch(task->tk_status) {
6144 case 0:
6145 case -NFS4ERR_COMPLETE_ALREADY:
6146 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6147 break;
6148 case -NFS4ERR_DELAY:
aa5190d0 6149 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6150 /* fall through */
6151 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6152 return -EAGAIN;
6153 default:
0400a6b0 6154 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6155 }
6156 return 0;
6157}
6158
fce5c838
RL		 6159static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6160{
6161 struct nfs4_reclaim_complete_data *calldata = data;
6162 struct nfs_client *clp = calldata->clp;
6163 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6164
6165 dprintk("--> %s\n", __func__);
14516c3a
TM		 6166 if (!nfs41_sequence_done(task, res))
6167 return;
fce5c838 6168
aa5190d0
TM		 6169 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6170 rpc_restart_call_prepare(task);
6171 return;
6172 }
fce5c838
RL		 6173 dprintk("<-- %s\n", __func__);
6174}
6175
6176static void nfs4_free_reclaim_complete_data(void *data)
6177{
6178 struct nfs4_reclaim_complete_data *calldata = data;
6179
6180 kfree(calldata);
6181}
6182
6183static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6184 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6185 .rpc_call_done = nfs4_reclaim_complete_done,
6186 .rpc_release = nfs4_free_reclaim_complete_data,
6187};
6188
6189/*
6190 * Issue a global reclaim complete.
6191 */
965e9c23
TM		 6192static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6193 struct rpc_cred *cred)
fce5c838
RL		 6194{
6195 struct nfs4_reclaim_complete_data *calldata;
6196 struct rpc_task *task;
6197 struct rpc_message msg = {
6198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6199 .rpc_cred = cred,
fce5c838
RL		 6200 };
6201 struct rpc_task_setup task_setup_data = {
6202 .rpc_client = clp->cl_rpcclient,
6203 .rpc_message = &msg,
6204 .callback_ops = &nfs4_reclaim_complete_call_ops,
6205 .flags = RPC_TASK_ASYNC,
6206 };
6207 int status = -ENOMEM;
6208
6209 dprintk("--> %s\n", __func__);
8535b2be 6210 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6211 if (calldata == NULL)
6212 goto out;
6213 calldata->clp = clp;
6214 calldata->arg.one_fs = 0;
fce5c838 6215
9d12b216 6216 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6217 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6218 msg.rpc_argp = &calldata->arg;
6219 msg.rpc_resp = &calldata->res;
6220 task_setup_data.callback_data = calldata;
6221 task = rpc_run_task(&task_setup_data);
acf82b85 6222 if (IS_ERR(task)) {
fce5c838 6223 status = PTR_ERR(task);
acf82b85
DC		 6224 goto out;
6225 }
c34c32ea
AA		 6226 status = nfs4_wait_for_completion_rpc_task(task);
6227 if (status == 0)
6228 status = task->tk_status;
fce5c838 6229 rpc_put_task(task);
acf82b85 6230 return 0;
fce5c838
RL		 6231out:
6232 dprintk("<-- %s status=%d\n", __func__, status);
6233 return status;
6234}
b1f69b75
AA		 6235
6236static void
6237nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6238{
6239 struct nfs4_layoutget *lgp = calldata;
c31663d4 6240 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6241 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6242
6243 dprintk("--> %s\n", __func__);
c31663d4
FI		 6244 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6245 * right now covering the LAYOUTGET we are about to send.
6246 * However, that is not so catastrophic, and there seems
6247 * to be no way to prevent it completely.
6248 */
6ba7db34 6249 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6250 &lgp->res.seq_res, task))
b1f69b75 6251 return;
cf7d63f1
FI		 6252 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6253 NFS_I(lgp->args.inode)->layout,
6254 lgp->args.ctx->state)) {
6255 rpc_exit(task, NFS4_OK);
cf7d63f1 6256 }
b1f69b75
AA		 6257}
6258
6259static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6260{
6261 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6262 struct inode *inode = lgp->args.inode;
6263 struct nfs_server *server = NFS_SERVER(inode);
6264 struct pnfs_layout_hdr *lo;
6265 struct nfs4_state *state = NULL;
30005121 6266 unsigned long timeo, giveup;
b1f69b75
AA		 6267
6268 dprintk("--> %s\n", __func__);
6269
6ba7db34 6270 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6271 goto out;
b1f69b75
AA		 6272
6273 switch (task->tk_status) {
6274 case 0:
ee314c2a 6275 goto out;
b1f69b75
AA		 6276 case -NFS4ERR_LAYOUTTRYLATER:
6277 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6278 timeo = rpc_get_timeout(task->tk_client);
6279 giveup = lgp->args.timestamp + timeo;
6280 if (time_after(giveup, jiffies))
6281 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6282 break;
6283 case -NFS4ERR_EXPIRED:
6284 case -NFS4ERR_BAD_STATEID:
6285 spin_lock(&inode->i_lock);
6286 lo = NFS_I(inode)->layout;
6287 if (!lo || list_empty(&lo->plh_segs)) {
6288 spin_unlock(&inode->i_lock);
6289 /* If the open stateid was bad, then recover it. */
6290 state = lgp->args.ctx->state;
6291 } else {
6292 LIST_HEAD(head);
6293
6294 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6295 spin_unlock(&inode->i_lock);
6296 /* Mark the bad layout state as invalid, then
6297 * retry using the open stateid. */
6298 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6299 }
6300 }
ee314c2a
TM		 6301 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6302 rpc_restart_call_prepare(task);
6303out:
b1f69b75
AA		 6304 dprintk("<-- %s\n", __func__);
6305}
6306
8554116e
IK		 6307static size_t max_response_pages(struct nfs_server *server)
6308{
6309 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6310 return nfs_page_array_len(0, max_resp_sz);
6311}
6312
6313static void nfs4_free_pages(struct page **pages, size_t size)
6314{
6315 int i;
6316
6317 if (!pages)
6318 return;
6319
6320 for (i = 0; i < size; i++) {
6321 if (!pages[i])
6322 break;
6323 __free_page(pages[i]);
6324 }
6325 kfree(pages);
6326}
6327
6328static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6329{
6330 struct page **pages;
6331 int i;
6332
6333 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6334 if (!pages) {
6335 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6336 return NULL;
6337 }
6338
6339 for (i = 0; i < size; i++) {
6340 pages[i] = alloc_page(gfp_flags);
6341 if (!pages[i]) {
6342 dprintk("%s: failed to allocate page\n", __func__);
6343 nfs4_free_pages(pages, size);
6344 return NULL;
6345 }
6346 }
6347
6348 return pages;
6349}
6350
b1f69b75
AA		 6351static void nfs4_layoutget_release(void *calldata)
6352{
6353 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6354 struct inode *inode = lgp->args.inode;
6355 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6356 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6357
6358 dprintk("--> %s\n", __func__);
8554116e 6359 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6360 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6361 put_nfs_open_context(lgp->args.ctx);
6362 kfree(calldata);
6363 dprintk("<-- %s\n", __func__);
6364}
6365
6366static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6367 .rpc_call_prepare = nfs4_layoutget_prepare,
6368 .rpc_call_done = nfs4_layoutget_done,
6369 .rpc_release = nfs4_layoutget_release,
6370};
6371
a0b0a6e3
TM		 6372struct pnfs_layout_segment *
6373nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6374{
a47970ff
WAA		 6375 struct inode *inode = lgp->args.inode;
6376 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6377 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6378 struct rpc_task *task;
6379 struct rpc_message msg = {
6380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6381 .rpc_argp = &lgp->args,
6382 .rpc_resp = &lgp->res,
6ab59344 6383 .rpc_cred = lgp->cred,
b1f69b75
AA		 6384 };
6385 struct rpc_task_setup task_setup_data = {
6386 .rpc_client = server->client,
6387 .rpc_message = &msg,
6388 .callback_ops = &nfs4_layoutget_call_ops,
6389 .callback_data = lgp,
6390 .flags = RPC_TASK_ASYNC,
6391 };
a0b0a6e3 6392 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6393 int status = 0;
6394
6395 dprintk("--> %s\n", __func__);
6396
8554116e
IK		 6397 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6398 if (!lgp->args.layout.pages) {
6399 nfs4_layoutget_release(lgp);
a0b0a6e3 6400 return ERR_PTR(-ENOMEM);
8554116e
IK		 6401 }
6402 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6403 lgp->args.timestamp = jiffies;
8554116e 6404
35124a09 6405 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6406 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6407 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6408
6409 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6410 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6411
b1f69b75
AA		 6412 task = rpc_run_task(&task_setup_data);
6413 if (IS_ERR(task))
a0b0a6e3 6414 return ERR_CAST(task);
b1f69b75 6415 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6416 if (status == 0)
6417 status = task->tk_status;
085b7a45
WAA		 6418 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6419 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6420 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6421 rpc_put_task(task);
6422 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6423 if (status)
6424 return ERR_PTR(status);
6425 return lseg;
b1f69b75
AA		 6426}
6427
cbe82603
BH		 6428static void
6429nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6430{
6431 struct nfs4_layoutreturn *lrp = calldata;
6432
6433 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6434 nfs41_setup_sequence(lrp->clp->cl_session,
6435 &lrp->args.seq_args,
6436 &lrp->res.seq_res,
6437 task);
cbe82603
BH		 6438}
6439
6440static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6441{
6442 struct nfs4_layoutreturn *lrp = calldata;
6443 struct nfs_server *server;
6444
6445 dprintk("--> %s\n", __func__);
6446
6ba7db34 6447 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6448 return;
6449
6450 server = NFS_SERVER(lrp->args.inode);
6451 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6452 rpc_restart_call_prepare(task);
cbe82603
BH		 6453 return;
6454 }
cbe82603
BH		 6455 dprintk("<-- %s\n", __func__);
6456}
6457
6458static void nfs4_layoutreturn_release(void *calldata)
6459{
6460 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6461 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6462
6463 dprintk("--> %s\n", __func__);
849b286f
TM		 6464 spin_lock(&lo->plh_inode->i_lock);
6465 if (lrp->res.lrs_present)
6466 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6467 lo->plh_block_lgets--;
6468 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6469 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6470 kfree(calldata);
6471 dprintk("<-- %s\n", __func__);
6472}
6473
6474static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6475 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6476 .rpc_call_done = nfs4_layoutreturn_done,
6477 .rpc_release = nfs4_layoutreturn_release,
6478};
6479
6480int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6481{
6482 struct rpc_task *task;
6483 struct rpc_message msg = {
6484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6485 .rpc_argp = &lrp->args,
6486 .rpc_resp = &lrp->res,
9556000d 6487 .rpc_cred = lrp->cred,
cbe82603
BH		 6488 };
6489 struct rpc_task_setup task_setup_data = {
6490 .rpc_client = lrp->clp->cl_rpcclient,
6491 .rpc_message = &msg,
6492 .callback_ops = &nfs4_layoutreturn_call_ops,
6493 .callback_data = lrp,
6494 };
6495 int status;
6496
6497 dprintk("--> %s\n", __func__);
9d12b216 6498 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6499 task = rpc_run_task(&task_setup_data);
6500 if (IS_ERR(task))
6501 return PTR_ERR(task);
6502 status = task->tk_status;
6503 dprintk("<-- %s status=%d\n", __func__, status);
6504 rpc_put_task(task);
6505 return status;
6506}
6507
7f11d8d3
AA		 6508/*
6509 * Retrieve the list of Data Server devices from the MDS.
6510 */
6511static int _nfs4_getdevicelist(struct nfs_server *server,
6512 const struct nfs_fh *fh,
6513 struct pnfs_devicelist *devlist)
6514{
6515 struct nfs4_getdevicelist_args args = {
6516 .fh = fh,
6517 .layoutclass = server->pnfs_curr_ld->id,
6518 };
6519 struct nfs4_getdevicelist_res res = {
6520 .devlist = devlist,
6521 };
6522 struct rpc_message msg = {
6523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6524 .rpc_argp = &args,
6525 .rpc_resp = &res,
6526 };
6527 int status;
6528
6529 dprintk("--> %s\n", __func__);
6530 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6531 &res.seq_res, 0);
6532 dprintk("<-- %s status=%d\n", __func__, status);
6533 return status;
6534}
6535
6536int nfs4_proc_getdevicelist(struct nfs_server *server,
6537 const struct nfs_fh *fh,
6538 struct pnfs_devicelist *devlist)
6539{
6540 struct nfs4_exception exception = { };
6541 int err;
6542
6543 do {
6544 err = nfs4_handle_exception(server,
6545 _nfs4_getdevicelist(server, fh, devlist),
6546 &exception);
6547 } while (exception.retry);
6548
6549 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6550 err, devlist->num_devs);
6551
6552 return err;
6553}
6554EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6555
b1f69b75 6556static int
cd5875fe
TM		 6557_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6558 struct pnfs_device *pdev,
6559 struct rpc_cred *cred)
b1f69b75
AA		 6560{
6561 struct nfs4_getdeviceinfo_args args = {
6562 .pdev = pdev,
6563 };
6564 struct nfs4_getdeviceinfo_res res = {
6565 .pdev = pdev,
6566 };
6567 struct rpc_message msg = {
6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6569 .rpc_argp = &args,
6570 .rpc_resp = &res,
cd5875fe 6571 .rpc_cred = cred,
b1f69b75
AA		 6572 };
6573 int status;
6574
6575 dprintk("--> %s\n", __func__);
7c513058 6576 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6577 dprintk("<-- %s status=%d\n", __func__, status);
6578
6579 return status;
6580}
6581
cd5875fe
TM		 6582int nfs4_proc_getdeviceinfo(struct nfs_server *server,
6583 struct pnfs_device *pdev,
6584 struct rpc_cred *cred)
b1f69b75
AA		 6585{
6586 struct nfs4_exception exception = { };
6587 int err;
6588
6589 do {
6590 err = nfs4_handle_exception(server,
cd5875fe 6591 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 6592 &exception);
6593 } while (exception.retry);
6594 return err;
6595}
6596EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6597
863a3c6c
AA		 6598static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6599{
6600 struct nfs4_layoutcommit_data *data = calldata;
6601 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6602 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6603
d9afbd1b
TM		 6604 nfs41_setup_sequence(session,
6605 &data->args.seq_args,
6606 &data->res.seq_res,
6607 task);
863a3c6c
AA		 6608}
6609
6610static void
6611nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6612{
6613 struct nfs4_layoutcommit_data *data = calldata;
6614 struct nfs_server *server = NFS_SERVER(data->args.inode);
6615
6ba7db34 6616 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6617 return;
6618
6619 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6620 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6621 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6622 case -NFS4ERR_BADLAYOUT: /* no layout */
6623 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6624 task->tk_status = 0;
e59d27e0
TM		 6625 break;
6626 case 0:
863a3c6c
AA		 6627 nfs_post_op_update_inode_force_wcc(data->args.inode,
6628 data->res.fattr);
e59d27e0
TM		 6629 break;
6630 default:
6631 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6632 rpc_restart_call_prepare(task);
6633 return;
6634 }
6635 }
863a3c6c
AA		 6636}
6637
6638static void nfs4_layoutcommit_release(void *calldata)
6639{
6640 struct nfs4_layoutcommit_data *data = calldata;
6641
db29c089 6642 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6643 put_rpccred(data->cred);
6644 kfree(data);
6645}
6646
6647static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6648 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6649 .rpc_call_done = nfs4_layoutcommit_done,
6650 .rpc_release = nfs4_layoutcommit_release,
6651};
6652
6653int
ef311537 6654nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6655{
6656 struct rpc_message msg = {
6657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6658 .rpc_argp = &data->args,
6659 .rpc_resp = &data->res,
6660 .rpc_cred = data->cred,
6661 };
6662 struct rpc_task_setup task_setup_data = {
6663 .task = &data->task,
6664 .rpc_client = NFS_CLIENT(data->args.inode),
6665 .rpc_message = &msg,
6666 .callback_ops = &nfs4_layoutcommit_ops,
6667 .callback_data = data,
6668 .flags = RPC_TASK_ASYNC,
6669 };
6670 struct rpc_task *task;
6671 int status = 0;
6672
6673 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6674 "lbw: %llu inode %lu\n",
6675 data->task.tk_pid, sync,
6676 data->args.lastbytewritten,
6677 data->args.inode->i_ino);
6678
9d12b216 6679 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6680 task = rpc_run_task(&task_setup_data);
6681 if (IS_ERR(task))
6682 return PTR_ERR(task);
ef311537 6683 if (sync == false)
863a3c6c
AA		 6684 goto out;
6685 status = nfs4_wait_for_completion_rpc_task(task);
6686 if (status != 0)
6687 goto out;
6688 status = task->tk_status;
6689out:
6690 dprintk("%s: status %d\n", __func__, status);
6691 rpc_put_task(task);
6692 return status;
6693}
fca78d6d
BS		 6694
6695static int
6696_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6697 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6698{
6699 struct nfs41_secinfo_no_name_args args = {
6700 .style = SECINFO_STYLE_CURRENT_FH,
6701 };
6702 struct nfs4_secinfo_res res = {
6703 .flavors = flavors,
6704 };
6705 struct rpc_message msg = {
6706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6707 .rpc_argp = &args,
6708 .rpc_resp = &res,
6709 };
6710 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6711}
6712
6713static int
6714nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6715 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6716{
6717 struct nfs4_exception exception = { };
6718 int err;
6719 do {
6720 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6721 switch (err) {
6722 case 0:
6723 case -NFS4ERR_WRONGSEC:
6724 case -NFS4ERR_NOTSUPP:
05e9cfb4 6725 goto out;
fca78d6d
BS		 6726 default:
6727 err = nfs4_handle_exception(server, err, &exception);
6728 }
6729 } while (exception.retry);
05e9cfb4 6730out:
fca78d6d
BS		 6731 return err;
6732}
6733
6734static int
6735nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6736 struct nfs_fsinfo *info)
6737{
6738 int err;
6739 struct page *page;
6740 rpc_authflavor_t flavor;
6741 struct nfs4_secinfo_flavors *flavors;
6742
6743 page = alloc_page(GFP_KERNEL);
6744 if (!page) {
6745 err = -ENOMEM;
6746 goto out;
6747 }
6748
6749 flavors = page_address(page);
6750 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6751
6752 /*
6753 * Fall back on "guess and check" method if
6754 * the server doesn't support SECINFO_NO_NAME
6755 */
6756 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6757 err = nfs4_find_root_sec(server, fhandle, info);
6758 goto out_freepage;
6759 }
6760 if (err)
6761 goto out_freepage;
6762
6763 flavor = nfs_find_best_sec(flavors);
6764 if (err == 0)
6765 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6766
6767out_freepage:
6768 put_page(page);
6769 if (err == -EACCES)
6770 return -EPERM;
6771out:
6772 return err;
6773}
1cab0652 6774
ab7cb0df
TM		 6775static int _nfs41_test_stateid(struct nfs_server *server,
6776 nfs4_stateid *stateid,
6777 struct rpc_cred *cred)
7d974794
BS		 6778{
6779 int status;
6780 struct nfs41_test_stateid_args args = {
1cab0652 6781 .stateid = stateid,
7d974794
BS		 6782 };
6783 struct nfs41_test_stateid_res res;
6784 struct rpc_message msg = {
6785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6786 .rpc_argp = &args,
6787 .rpc_resp = &res,
ab7cb0df 6788 .rpc_cred = cred,
7d974794 6789 };
1cab0652 6790
38527b15 6791 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6792 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6793 nfs4_set_sequence_privileged(&args.seq_args);
6794 status = nfs4_call_sync_sequence(server->client, server, &msg,
6795 &args.seq_args, &res.seq_res);
38527b15
CL		 6796 if (status != NFS_OK) {
6797 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6798 return status;
38527b15
CL		 6799 }
6800 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6801 return -res.status;
7d974794
BS		 6802}
6803
38527b15
CL		 6804/**
6805 * nfs41_test_stateid - perform a TEST_STATEID operation
6806 *
6807 * @server: server / transport on which to perform the operation
6808 * @stateid: state ID to test
ab7cb0df 6809 * @cred: credential
38527b15
CL		 6810 *
6811 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6812 * Otherwise a negative NFS4ERR value is returned if the operation
6813 * failed or the state ID is not currently valid.
6814 */
ab7cb0df
TM		 6815static int nfs41_test_stateid(struct nfs_server *server,
6816 nfs4_stateid *stateid,
6817 struct rpc_cred *cred)
7d974794
BS		 6818{
6819 struct nfs4_exception exception = { };
6820 int err;
6821 do {
ab7cb0df 6822 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 6823 if (err != -NFS4ERR_DELAY)
6824 break;
6825 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6826 } while (exception.retry);
6827 return err;
6828}
9aeda35f 6829
7c1d5fae
TM		 6830struct nfs_free_stateid_data {
6831 struct nfs_server *server;
6832 struct nfs41_free_stateid_args args;
9aeda35f 6833 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6834};
6835
6836static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6837{
6838 struct nfs_free_stateid_data *data = calldata;
6839 nfs41_setup_sequence(nfs4_get_session(data->server),
6840 &data->args.seq_args,
6841 &data->res.seq_res,
6842 task);
6843}
6844
6845static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6846{
6847 struct nfs_free_stateid_data *data = calldata;
6848
6849 nfs41_sequence_done(task, &data->res.seq_res);
6850
6851 switch (task->tk_status) {
6852 case -NFS4ERR_DELAY:
6853 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6854 rpc_restart_call_prepare(task);
6855 }
6856}
6857
6858static void nfs41_free_stateid_release(void *calldata)
6859{
6860 kfree(calldata);
6861}
6862
6863const struct rpc_call_ops nfs41_free_stateid_ops = {
6864 .rpc_call_prepare = nfs41_free_stateid_prepare,
6865 .rpc_call_done = nfs41_free_stateid_done,
6866 .rpc_release = nfs41_free_stateid_release,
6867};
6868
6869static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6870 nfs4_stateid *stateid,
ab7cb0df 6871 struct rpc_cred *cred,
7c1d5fae
TM		 6872 bool privileged)
6873{
9aeda35f
BS		 6874 struct rpc_message msg = {
6875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 6876 .rpc_cred = cred,
9aeda35f 6877 };
7c1d5fae
TM		 6878 struct rpc_task_setup task_setup = {
6879 .rpc_client = server->client,
6880 .rpc_message = &msg,
6881 .callback_ops = &nfs41_free_stateid_ops,
6882 .flags = RPC_TASK_ASYNC,
6883 };
6884 struct nfs_free_stateid_data *data;
9aeda35f 6885
38527b15 6886 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6887 data = kmalloc(sizeof(*data), GFP_NOFS);
6888 if (!data)
6889 return ERR_PTR(-ENOMEM);
6890 data->server = server;
6891 nfs4_stateid_copy(&data->args.stateid, stateid);
6892
6893 task_setup.callback_data = data;
6894
6895 msg.rpc_argp = &data->args;
6896 msg.rpc_resp = &data->res;
6897 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6898 if (privileged)
6899 nfs4_set_sequence_privileged(&data->args.seq_args);
6900
6901 return rpc_run_task(&task_setup);
9aeda35f
BS		 6902}
6903
38527b15
CL		 6904/**
6905 * nfs41_free_stateid - perform a FREE_STATEID operation
6906 *
6907 * @server: server / transport on which to perform the operation
6908 * @stateid: state ID to release
ab7cb0df 6909 * @cred: credential
38527b15
CL		 6910 *
6911 * Returns NFS_OK if the server freed "stateid". Otherwise a
6912 * negative NFS4ERR value is returned.
6913 */
ab7cb0df
TM		 6914static int nfs41_free_stateid(struct nfs_server *server,
6915 nfs4_stateid *stateid,
6916 struct rpc_cred *cred)
9aeda35f 6917{
7c1d5fae
TM		 6918 struct rpc_task *task;
6919 int ret;
6920
ab7cb0df 6921 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 6922 if (IS_ERR(task))
6923 return PTR_ERR(task);
6924 ret = rpc_wait_for_completion_task(task);
6925 if (!ret)
6926 ret = task->tk_status;
6927 rpc_put_task(task);
6928 return ret;
9aeda35f 6929}
36281caa 6930
c8b2d0bf
TM		 6931static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6932{
6933 struct rpc_task *task;
ab7cb0df 6934 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 6935
ab7cb0df 6936 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 6937 nfs4_free_lock_state(server, lsp);
6938 if (IS_ERR(task))
6939 return PTR_ERR(task);
6940 rpc_put_task(task);
6941 return 0;
6942}
6943
36281caa
TM		 6944static bool nfs41_match_stateid(const nfs4_stateid *s1,
6945 const nfs4_stateid *s2)
6946{
2d2f24ad 6947 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6948 return false;
6949
2d2f24ad 6950 if (s1->seqid == s2->seqid)
36281caa 6951 return true;
2d2f24ad 6952 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6953 return true;
6954
6955 return false;
6956}
6957
557134a3
AA		 6958#endif /* CONFIG_NFS_V4_1 */
6959
36281caa
TM		 6960static bool nfs4_match_stateid(const nfs4_stateid *s1,
6961 const nfs4_stateid *s2)
6962{
f597c537 6963 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6964}
6965
6966
17280175 6967static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6968 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6969 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6970 .recover_open = nfs4_open_reclaim,
6971 .recover_lock = nfs4_lock_reclaim,
591d71cb 6972 .establish_clid = nfs4_init_clientid,
90a16617 6973 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6974 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6975};
6976
591d71cb 6977#if defined(CONFIG_NFS_V4_1)
17280175 6978static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6979 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6980 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6981 .recover_open = nfs4_open_reclaim,
6982 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6983 .establish_clid = nfs41_init_clientid,
b4b82607 6984 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6985 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6986 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6987};
6988#endif /* CONFIG_NFS_V4_1 */
6989
17280175 6990static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6991 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6992 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6993 .recover_open = nfs4_open_expired,
6994 .recover_lock = nfs4_lock_expired,
6995 .establish_clid = nfs4_init_clientid,
90a16617 6996 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6997};
6998
6999#if defined(CONFIG_NFS_V4_1)
17280175 7000static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7001 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7002 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7003 .recover_open = nfs41_open_expired,
7004 .recover_lock = nfs41_lock_expired,
4d643d1d 7005 .establish_clid = nfs41_init_clientid,
b4b82607 7006 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7007};
591d71cb 7008#endif /* CONFIG_NFS_V4_1 */
1da177e4 7009
17280175 7010static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7011 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7012 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7013 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7014};
7015
7016#if defined(CONFIG_NFS_V4_1)
17280175 7017static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7018 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7019 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7020 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7021};
7022#endif
7023
97dc1359
TM		 7024static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7025 .minor_version = 0,
39c6daae
TM		 7026 .init_caps = NFS_CAP_READDIRPLUS
7027 | NFS_CAP_ATOMIC_OPEN
7028 | NFS_CAP_CHANGE_ATTR
7029 | NFS_CAP_POSIX_LOCK,
97dc1359 7030 .call_sync = _nfs4_call_sync,
36281caa 7031 .match_stateid = nfs4_match_stateid,
fca78d6d 7032 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7033 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7034 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7035 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7036 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7037};
7038
7039#if defined(CONFIG_NFS_V4_1)
7040static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7041 .minor_version = 1,
39c6daae
TM		 7042 .init_caps = NFS_CAP_READDIRPLUS
7043 | NFS_CAP_ATOMIC_OPEN
7044 | NFS_CAP_CHANGE_ATTR
3b66486c 7045 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7046 | NFS_CAP_STATEID_NFSV41
7047 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7048 .call_sync = nfs4_call_sync_sequence,
36281caa 7049 .match_stateid = nfs41_match_stateid,
fca78d6d 7050 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7051 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7052 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7053 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7054 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7055};
7056#endif
7057
97dc1359
TM		 7058const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7059 [0] = &nfs_v4_0_minor_ops,
7060#if defined(CONFIG_NFS_V4_1)
7061 [1] = &nfs_v4_1_minor_ops,
7062#endif
7063};
7064
73a79706
BS		 7065const struct inode_operations nfs4_dir_inode_operations = {
7066 .create = nfs_create,
7067 .lookup = nfs_lookup,
7068 .atomic_open = nfs_atomic_open,
7069 .link = nfs_link,
7070 .unlink = nfs_unlink,
7071 .symlink = nfs_symlink,
7072 .mkdir = nfs_mkdir,
7073 .rmdir = nfs_rmdir,
7074 .mknod = nfs_mknod,
7075 .rename = nfs_rename,
7076 .permission = nfs_permission,
7077 .getattr = nfs_getattr,
7078 .setattr = nfs_setattr,
7079 .getxattr = generic_getxattr,
7080 .setxattr = generic_setxattr,
7081 .listxattr = generic_listxattr,
7082 .removexattr = generic_removexattr,
7083};
7084
92e1d5be 7085static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7086 .permission = nfs_permission,
7087 .getattr = nfs_getattr,
7088 .setattr = nfs_setattr,
64c2ce8b
AK		 7089 .getxattr = generic_getxattr,
7090 .setxattr = generic_setxattr,
7091 .listxattr = generic_listxattr,
7092 .removexattr = generic_removexattr,
6b3b5496
BF		 7093};
7094
509de811 7095const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7096 .version = 4, /* protocol version */
7097 .dentry_ops = &nfs4_dentry_operations,
7098 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7099 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7100 .file_ops = &nfs4_file_operations,
1da177e4 7101 .getroot = nfs4_proc_get_root,
281cad46 7102 .submount = nfs4_submount,
ff9099f2 7103 .try_mount = nfs4_try_mount,
1da177e4
LT		 7104 .getattr = nfs4_proc_getattr,
7105 .setattr = nfs4_proc_setattr,
7106 .lookup = nfs4_proc_lookup,
7107 .access = nfs4_proc_access,
7108 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7109 .create = nfs4_proc_create,
7110 .remove = nfs4_proc_remove,
7111 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7112 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7113 .unlink_done = nfs4_proc_unlink_done,
7114 .rename = nfs4_proc_rename,
d3d4152a 7115 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7116 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7117 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7118 .link = nfs4_proc_link,
7119 .symlink = nfs4_proc_symlink,
7120 .mkdir = nfs4_proc_mkdir,
7121 .rmdir = nfs4_proc_remove,
7122 .readdir = nfs4_proc_readdir,
7123 .mknod = nfs4_proc_mknod,
7124 .statfs = nfs4_proc_statfs,
7125 .fsinfo = nfs4_proc_fsinfo,
7126 .pathconf = nfs4_proc_pathconf,
e9326dca 7127 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7128 .decode_dirent = nfs4_decode_dirent,
7129 .read_setup = nfs4_proc_read_setup,
1abb5088 7130 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7131 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7132 .read_done = nfs4_read_done,
1da177e4 7133 .write_setup = nfs4_proc_write_setup,
57208fa7 7134 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7135 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7136 .write_done = nfs4_write_done,
1da177e4 7137 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7138 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7139 .commit_done = nfs4_commit_done,
1da177e4 7140 .lock = nfs4_proc_lock,
e50a1c2e 7141 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7142 .close_context = nfs4_close_context,
2b484297 7143 .open_context = nfs4_atomic_open,
011e2a7f 7144 .have_delegation = nfs4_have_delegation,
57ec14c5 7145 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7146 .alloc_client = nfs4_alloc_client,
45a52a02 7147 .init_client = nfs4_init_client,
cdb7eced 7148 .free_client = nfs4_free_client,
1179acc6
BS		 7149 .create_server = nfs4_create_server,
7150 .clone_server = nfs_clone_server,
1da177e4
LT		 7151};
7152
64c2ce8b
AK		 7153static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7154 .prefix = XATTR_NAME_NFSV4_ACL,
7155 .list = nfs4_xattr_list_nfs4_acl,
7156 .get = nfs4_xattr_get_nfs4_acl,
7157 .set = nfs4_xattr_set_nfs4_acl,
7158};
7159
7160const struct xattr_handler *nfs4_xattr_handlers[] = {
7161 &nfs4_xattr_nfs4_acl_handler,
7162 NULL
7163};
7164
1da177e4
LT		 7165/*
7166 * Local variables:
7167 * c-basic-offset: 8
7168 * End:
7169 */
Linux 6.x block layer and io_uring tree(s)