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[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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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
TM		 66#include "nfs4session.h"
67
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
96 return -EREMOTEIO;
7ebb9315
BS		 97 case -NFS4ERR_WRONGSEC:
98 return -EPERM;
3ddeb7c5
TM		 99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
101 return -EINVAL;
fb13bfa7
TM		 102 case -NFS4ERR_SHARE_DENIED:
103 return -EACCES;
f25efd85
SD		 104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
6168f62c
WAA		 106 case -NFS4ERR_ACCESS:
107 return -EACCES;
52567b03 108 default:
1da177e4 109 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 110 __func__, -err);
52567b03 111 break;
1da177e4 112 }
52567b03 113 return -EIO;
1da177e4
LT		 114}
115
116/*
117 * This is our standard bitmap for GETATTR requests.
118 */
1549210f 119const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 120 FATTR4_WORD0_TYPE
121 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_SIZE
123 | FATTR4_WORD0_FSID
124 | FATTR4_WORD0_FILEID,
125 FATTR4_WORD1_MODE
126 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
134};
135
1549210f
TM		 136static const u32 nfs4_pnfs_open_bitmap[3] = {
137 FATTR4_WORD0_TYPE
138 | FATTR4_WORD0_CHANGE
139 | FATTR4_WORD0_SIZE
140 | FATTR4_WORD0_FSID
141 | FATTR4_WORD0_FILEID,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
152};
153
e23008ec
AA		 154static const u32 nfs4_open_noattr_bitmap[3] = {
155 FATTR4_WORD0_TYPE
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
158};
159
1da177e4
LT		 160const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
167};
168
4ce79717 169const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 170 FATTR4_WORD0_MAXLINK
171 | FATTR4_WORD0_MAXNAME,
172 0
173};
174
dae100c2 175const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
55b6e774 179 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 182};
183
830b8e33
MN		 184const u32 nfs4_fs_locations_bitmap[2] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
201};
202
bc4785cd 203static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 204 struct nfs4_readdir_arg *readdir)
205{
0dbb4c67 206 __be32 *start, *p;
1da177e4 207
1da177e4 208 if (cookie > 2) {
b7ef1956 209 readdir->cookie = cookie;
1da177e4
LT		 210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
211 return;
212 }
213
214 readdir->cookie = 0;
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
216 if (cookie == 2)
217 return;
218
219 /*
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
224 * instead of 1 or 2.
225 */
2b86ce2d 226 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 227
228 if (cookie == 0) {
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
234 p++;
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
4e769b93 238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 239 }
240
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
246 p++;
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
4e769b93 250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 251
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
2b86ce2d 254 kunmap_atomic(start);
1da177e4
LT		 255}
256
65de872e
TM		 257static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
258{
259 int res = 0;
260
261 might_sleep();
262
263 if (*timeout <= 0)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 267 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 268 if (fatal_signal_pending(current))
269 res = -ERESTARTSYS;
270 *timeout <<= 1;
271 return res;
272}
273
274/* This is the error handling routine for processes that are allowed
275 * to sleep.
276 */
b064eca2 277static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 278{
279 struct nfs_client *clp = server->nfs_client;
9e33bed5 280 struct nfs4_state *state = exception->state;
3114ea7a 281 struct inode *inode = exception->inode;
65de872e
TM		 282 int ret = errorcode;
283
284 exception->retry = 0;
285 switch(errorcode) {
286 case 0:
287 return 0;
3114ea7a 288 case -NFS4ERR_OPENMODE:
011e2a7f 289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 290 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 291 exception->retry = 1;
292 return 0;
293 }
294 if (state == NULL)
295 break;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
a1d0b5ee 298 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 301 if (state == NULL)
302 break;
14977489 303 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
0ced63d1
TM		 306 case -NFS4ERR_EXPIRED:
307 if (state != NULL)
308 nfs4_schedule_stateid_recovery(server, state);
65de872e 309 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 310 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
03391693 313#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
322 errorcode);
9f594791 323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 324 goto wait_on_recovery;
03391693 325#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 326 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
329 * fail
330 */
331 ret = -EBUSY;
332 break;
333 }
65de872e
TM		 334 case -NFS4ERR_GRACE:
335 case -NFS4ERR_DELAY:
336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
d185a334 381static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 382{
e3725ec0 383 struct nfs4_session *session;
13615871 384 struct nfs4_slot_table *tbl;
c10e4498 385 bool send_new_highest_used_slotid = false;
13615871 386
dfb4f309 387 if (!res->sr_slot) {
13615871
AA		 388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
691daf3b 390 dprintk("%s: No slot\n", __func__);
35dc1d74 391 return;
13615871 392 }
e3725ec0
TM		 393 tbl = res->sr_slot->table;
394 session = tbl->session;
ea028ac9 395
35dc1d74 396 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
399 */
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
402
b75ad4cd
TM		 403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
405 goto out_unlock;
406 }
f4af6e2a 407 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 408
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
b75ad4cd 411out_unlock:
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
14516c3a 422 struct nfs_client *clp;
ac20d163 423 bool interrupted = false;
85563073 424 int ret = 1;
b0df806c 425
468f8613
BS		 426 /* don't increment the sequence number if the task wasn't sent */
427 if (!RPC_WAS_SENT(task))
b0df806c
AA		 428 goto out;
429
933602e3 430 slot = res->sr_slot;
e3725ec0 431 session = slot->table->session;
933602e3 432
ac20d163
TM		 433 if (slot->interrupted) {
434 slot->interrupted = 0;
435 interrupted = true;
436 }
437
691daf3b 438 /* Check the SEQUENCE operation status */
14516c3a
TM		 439 switch (res->sr_status) {
440 case 0:
b0df806c 441 /* Update the slot's sequence and clientid lease timer */
933602e3 442 ++slot->seq_nr;
e3725ec0 443 clp = session->clp;
8e63b6a8 444 do_renew_lease(clp, res->sr_timestamp);
0629e370 445 /* Check sequence flags */
b4410c2f
TM		 446 if (res->sr_status_flags != 0)
447 nfs4_schedule_lease_recovery(clp);
464ee9f9 448 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 449 break;
ac20d163
TM		 450 case 1:
451 /*
452 * sr_status remains 1 if an RPC level error occurred.
453 * The server may or may not have processed the sequence
454 * operation..
455 * Mark the slot as having hosted an interrupted RPC call.
456 */
457 slot->interrupted = 1;
458 goto out;
14516c3a
TM		 459 case -NFS4ERR_DELAY:
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
462 * of RFC5661.
463 */
df2fabff 464 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 465 __func__,
df2fabff 466 slot->slot_nr,
933602e3 467 slot->seq_nr);
14516c3a 468 goto out_retry;
85563073
TM		 469 case -NFS4ERR_BADSLOT:
470 /*
471 * The slot id we used was probably retired. Try again
472 * using a different slot id.
473 */
e8794440
TM		 474 goto retry_nowait;
475 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 476 /*
477 * Was the last operation on this sequence interrupted?
478 * If so, retry after bumping the sequence number.
479 */
480 if (interrupted) {
481 ++slot->seq_nr;
482 goto retry_nowait;
483 }
e8794440
TM		 484 /*
485 * Could this slot have been previously retired?
486 * If so, then the server may be expecting seq_nr = 1!
487 */
8e63b6a8
TM		 488 if (slot->seq_nr != 1) {
489 slot->seq_nr = 1;
490 goto retry_nowait;
491 }
492 break;
e8794440
TM		 493 case -NFS4ERR_SEQ_FALSE_RETRY:
494 ++slot->seq_nr;
495 goto retry_nowait;
14516c3a
TM		 496 default:
497 /* Just update the slot sequence no. */
933602e3 498 ++slot->seq_nr;
b0df806c
AA		 499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 503 nfs41_sequence_free_slot(res);
85563073 504 return ret;
e8794440
TM		 505retry_nowait:
506 if (rpc_restart_call_prepare(task)) {
507 task->tk_status = 0;
508 ret = 0;
509 }
510 goto out;
14516c3a 511out_retry:
d05dd4e9 512 if (!rpc_restart_call(task))
14516c3a
TM		 513 goto out;
514 rpc_delay(task, NFS4_POLL_RETRY_MAX);
515 return 0;
b0df806c
AA		 516}
517
14516c3a
TM		 518static int nfs4_sequence_done(struct rpc_task *task,
519 struct nfs4_sequence_res *res)
df896455 520{
e3725ec0 521 if (res->sr_slot == NULL)
14516c3a
TM		 522 return 1;
523 return nfs41_sequence_done(task, res);
df896455
TM		 524}
525
9d12b216
TM		 526static void nfs41_init_sequence(struct nfs4_sequence_args *args,
527 struct nfs4_sequence_res *res, int cache_reply)
528{
2b2fa717 529 args->sa_slot = NULL;
9d12b216 530 args->sa_cache_this = 0;
8fe72bac 531 args->sa_privileged = 0;
9d12b216
TM		 532 if (cache_reply)
533 args->sa_cache_this = 1;
9d12b216
TM		 534 res->sr_slot = NULL;
535}
536
8fe72bac
TM		 537static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
538{
539 args->sa_privileged = 1;
540}
541
dc70d7b3 542int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
ce5039c1
AA		 545 struct rpc_task *task)
546{
fbcd4abc
AA		 547 struct nfs4_slot *slot;
548 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 549
550 dprintk("--> %s\n", __func__);
ce5039c1 551 /* slot already allocated? */
dfb4f309 552 if (res->sr_slot != NULL)
d9afbd1b 553 goto out_success;
ce5039c1 554
fbcd4abc
AA		 555 tbl = &session->fc_slot_table;
556
69d206b5
TM		 557 task->tk_timeout = 0;
558
fbcd4abc 559 spin_lock(&tbl->slot_tbl_lock);
a2118c33 560 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 561 !args->sa_privileged) {
0b1c8fc4 562 /* The state manager will wait until the slot table is empty */
0b1c8fc4 563 dprintk("%s session is draining\n", __func__);
7b939a3f 564 goto out_sleep;
689cf5c1
AB		 565 }
566
2dc03b7f 567 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 568 if (IS_ERR(slot)) {
569 /* If out of memory, try again in 1/4 second */
570 if (slot == ERR_PTR(-ENOMEM))
571 task->tk_timeout = HZ >> 2;
fbcd4abc 572 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 573 goto out_sleep;
fbcd4abc
AA		 574 }
575 spin_unlock(&tbl->slot_tbl_lock);
576
2b2fa717 577 args->sa_slot = slot;
fbcd4abc 578
2dc03b7f
TM		 579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
580 slot->slot_nr, slot->seq_nr);
fbcd4abc 581
dfb4f309 582 res->sr_slot = slot;
8e63b6a8 583 res->sr_timestamp = jiffies;
2a6e26cd 584 res->sr_status_flags = 0;
fbcd4abc
AA		 585 /*
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
588 */
589 res->sr_status = 1;
d9afbd1b
TM		 590out_success:
591 rpc_call_start(task);
ce5039c1 592 return 0;
7b939a3f 593out_sleep:
8fe72bac
TM		 594 /* Privileged tasks are queued with top priority */
595 if (args->sa_privileged)
1e1093c7
TM		 596 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
597 NULL, RPC_PRIORITY_PRIVILEGED);
598 else
599 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 600 spin_unlock(&tbl->slot_tbl_lock);
601 return -EAGAIN;
ce5039c1 602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
ce5039c1
AA		 608 struct rpc_task *task)
609{
035168ab 610 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 611 int ret = 0;
612
d9afbd1b
TM		 613 if (session == NULL) {
614 rpc_call_start(task);
035168ab 615 goto out;
d9afbd1b 616 }
035168ab 617
df2fabff 618 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 619 __func__, session->clp, session, res->sr_slot ?
df2fabff 620 res->sr_slot->slot_nr : -1);
ce5039c1 621
9d12b216 622 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
035168ab 629 const struct nfs_server *seq_server;
ce5039c1
AA		 630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 632};
633
634static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
635{
636 struct nfs41_call_sync_data *data = calldata;
6ba7db34 637 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 638
035168ab
TM		 639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
d9afbd1b 641 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 642}
643
69ab40c4
AA		 644static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
645{
646 struct nfs41_call_sync_data *data = calldata;
647
14516c3a 648 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 649}
650
17280175 651static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 652 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 653 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 654};
655
7c513058
BS		 656static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
657 struct nfs_server *server,
ce5039c1
AA		 658 struct rpc_message *msg,
659 struct nfs4_sequence_args *args,
8fe72bac 660 struct nfs4_sequence_res *res)
ce5039c1
AA		 661{
662 int ret;
663 struct rpc_task *task;
664 struct nfs41_call_sync_data data = {
035168ab 665 .seq_server = server,
ce5039c1
AA		 666 .seq_args = args,
667 .seq_res = res,
ce5039c1
AA		 668 };
669 struct rpc_task_setup task_setup = {
7c513058 670 .rpc_client = clnt,
ce5039c1
AA		 671 .rpc_message = msg,
672 .callback_ops = &nfs41_call_sync_ops,
673 .callback_data = &data
674 };
675
ce5039c1
AA		 676 task = rpc_run_task(&task_setup);
677 if (IS_ERR(task))
678 ret = PTR_ERR(task);
679 else {
680 ret = task->tk_status;
681 rpc_put_task(task);
682 }
683 return ret;
684}
685
df896455 686#else
8fe72bac 687static
9d12b216
TM		 688void nfs41_init_sequence(struct nfs4_sequence_args *args,
689 struct nfs4_sequence_res *res, int cache_reply)
690{
691}
692
8fe72bac
TM		 693static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
694{
695}
696
697
14516c3a
TM		 698static int nfs4_sequence_done(struct rpc_task *task,
699 struct nfs4_sequence_res *res)
df896455 700{
14516c3a 701 return 1;
df896455 702}
cccef3b9
AA		 703#endif /* CONFIG_NFS_V4_1 */
704
fd0c0953 705static
7c513058
BS		 706int _nfs4_call_sync(struct rpc_clnt *clnt,
707 struct nfs_server *server,
cccef3b9
AA		 708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
fd0c0953 710 struct nfs4_sequence_res *res)
cccef3b9 711{
7c513058 712 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 713}
714
fd0c0953 715static
7c513058
BS		 716int nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
e73b83f2
BS		 718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
721 int cache_reply)
722{
fd0c0953 723 nfs41_init_sequence(args, res, cache_reply);
7c513058 724 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 725 args, res);
e73b83f2 726}
cccef3b9 727
38478b24 728static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 729{
38478b24 730 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 731
38478b24 732 spin_lock(&dir->i_lock);
359d7d1c 733 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 734 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 735 nfs_force_lookup_revalidate(dir);
a9a4a87a 736 dir->i_version = cinfo->after;
38478b24 737 spin_unlock(&dir->i_lock);
1da177e4
LT		 738}
739
e56e0b78 740struct nfs4_opendata {
c6d00e63 741 struct kref kref;
e56e0b78
TM		 742 struct nfs_openargs o_arg;
743 struct nfs_openres o_res;
cdd4e68b
TM		 744 struct nfs_open_confirmargs c_arg;
745 struct nfs_open_confirmres c_res;
6926afd1
TM		 746 struct nfs4_string owner_name;
747 struct nfs4_string group_name;
e56e0b78 748 struct nfs_fattr f_attr;
e56e0b78 749 struct dentry *dir;
82a2c1b7 750 struct dentry *dentry;
e56e0b78 751 struct nfs4_state_owner *owner;
aac00a8d 752 struct nfs4_state *state;
e56e0b78 753 struct iattr attrs;
26e976a8 754 unsigned long timestamp;
3e309914 755 unsigned int rpc_done : 1;
24ac23ab
TM		 756 int rpc_status;
757 int cancelled;
e56e0b78
TM		 758};
759
2ced46c2
TM		 760
761static void nfs4_init_opendata_res(struct nfs4_opendata *p)
762{
763 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 764 p->o_res.seqid = p->o_arg.seqid;
765 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 766 p->o_res.server = p->o_arg.server;
5f657530 767 p->o_res.access_request = p->o_arg.access;
2ced46c2 768 nfs_fattr_init(&p->f_attr);
6926afd1 769 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 770}
771
82a2c1b7 772static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 773 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 774 const struct iattr *attrs,
775 gfp_t gfp_mask)
e56e0b78 776{
82a2c1b7 777 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 778 struct inode *dir = parent->d_inode;
779 struct nfs_server *server = NFS_SERVER(dir);
780 struct nfs4_opendata *p;
781
8535b2be 782 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 783 if (p == NULL)
784 goto err;
8535b2be 785 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 786 if (p->o_arg.seqid == NULL)
787 goto err_free;
82a2c1b7
AV		 788 nfs_sb_active(dentry->d_sb);
789 p->dentry = dget(dentry);
e56e0b78
TM		 790 p->dir = parent;
791 p->owner = sp;
792 atomic_inc(&sp->so_count);
793 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 794 p->o_arg.open_flags = flags;
795 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 796 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
797 * will return permission denied for all bits until close */
798 if (!(flags & O_EXCL)) {
799 /* ask server to check for all possible rights as results
800 * are cached */
801 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
802 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 803 }
7539bbab 804 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 805 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
806 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 807 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 808 p->o_arg.server = server;
809 p->o_arg.bitmask = server->attr_bitmask;
1549210f 810 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 811 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 812 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 813 __be32 verf[2];
d77d76ff 814
e56e0b78
TM		 815 p->o_arg.u.attrs = &p->attrs;
816 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 817
818 verf[0] = jiffies;
819 verf[1] = current->pid;
820 memcpy(p->o_arg.u.verifier.data, verf,
821 sizeof(p->o_arg.u.verifier.data));
e56e0b78 822 }
cdd4e68b
TM		 823 p->c_arg.fh = &p->o_res.fh;
824 p->c_arg.stateid = &p->o_res.stateid;
825 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 826 nfs4_init_opendata_res(p);
c6d00e63 827 kref_init(&p->kref);
e56e0b78
TM		 828 return p;
829err_free:
830 kfree(p);
831err:
832 dput(parent);
833 return NULL;
834}
835
c6d00e63 836static void nfs4_opendata_free(struct kref *kref)
e56e0b78 837{
c6d00e63
TM		 838 struct nfs4_opendata *p = container_of(kref,
839 struct nfs4_opendata, kref);
82a2c1b7 840 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 841
842 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 843 if (p->state != NULL)
844 nfs4_put_open_state(p->state);
c6d00e63
TM		 845 nfs4_put_state_owner(p->owner);
846 dput(p->dir);
82a2c1b7
AV		 847 dput(p->dentry);
848 nfs_sb_deactive(sb);
6926afd1 849 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 850 kfree(p);
851}
852
853static void nfs4_opendata_put(struct nfs4_opendata *p)
854{
855 if (p != NULL)
856 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 857}
858
06f814a3
TM		 859static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
860{
06f814a3
TM		 861 int ret;
862
06f814a3 863 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 864 return ret;
865}
866
dc0b027d 867static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 868{
869 int ret = 0;
dc0b027d 870
536e43d1 871 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 872 goto out;
873 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 874 case FMODE_READ:
88069f77
TM		 875 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
876 && state->n_rdonly != 0;
6ee41268
TM		 877 break;
878 case FMODE_WRITE:
88069f77
TM		 879 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
880 && state->n_wronly != 0;
6ee41268
TM		 881 break;
882 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 883 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
884 && state->n_rdwr != 0;
6ee41268 885 }
dc0b027d 886out:
6ee41268
TM		 887 return ret;
888}
889
dc0b027d 890static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 891{
652f89f6
TM		 892 if (delegation == NULL)
893 return 0;
dc0b027d 894 if ((delegation->type & fmode) != fmode)
aac00a8d 895 return 0;
15c831bf 896 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 897 return 0;
b7391f44 898 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 899 return 1;
900}
901
dc0b027d 902static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 903{
dc0b027d 904 switch (fmode) {
e7616923
TM		 905 case FMODE_WRITE:
906 state->n_wronly++;
907 break;
908 case FMODE_READ:
909 state->n_rdonly++;
910 break;
911 case FMODE_READ|FMODE_WRITE:
912 state->n_rdwr++;
913 }
dc0b027d 914 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 915}
916
dc0b027d 917static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 918{
919 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 920 nfs4_stateid_copy(&state->stateid, stateid);
921 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 922 switch (fmode) {
003707c7
TM		 923 case FMODE_READ:
924 set_bit(NFS_O_RDONLY_STATE, &state->flags);
925 break;
926 case FMODE_WRITE:
927 set_bit(NFS_O_WRONLY_STATE, &state->flags);
928 break;
929 case FMODE_READ|FMODE_WRITE:
930 set_bit(NFS_O_RDWR_STATE, &state->flags);
931 }
e7616923
TM		 932}
933
dc0b027d 934static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 935{
8bda4e4c 936 write_seqlock(&state->seqlock);
dc0b027d 937 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 938 write_sequnlock(&state->seqlock);
003707c7
TM		 939}
940
dc0b027d 941static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 942{
8bda4e4c
TM		 943 /*
944 * Protect the call to nfs4_state_set_mode_locked and
945 * serialise the stateid update
946 */
947 write_seqlock(&state->seqlock);
003707c7 948 if (deleg_stateid != NULL) {
f597c537 949 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 950 set_bit(NFS_DELEGATED_STATE, &state->flags);
951 }
952 if (open_stateid != NULL)
dc0b027d 953 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 954 write_sequnlock(&state->seqlock);
955 spin_lock(&state->owner->so_lock);
dc0b027d 956 update_open_stateflags(state, fmode);
ec073428 957 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 958}
959
dc0b027d 960static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 961{
962 struct nfs_inode *nfsi = NFS_I(state->inode);
963 struct nfs_delegation *deleg_cur;
964 int ret = 0;
965
dc0b027d 966 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 967
968 rcu_read_lock();
969 deleg_cur = rcu_dereference(nfsi->delegation);
970 if (deleg_cur == NULL)
971 goto no_delegation;
972
973 spin_lock(&deleg_cur->lock);
974 if (nfsi->delegation != deleg_cur ||
dc0b027d 975 (deleg_cur->type & fmode) != fmode)
34310430
TM		 976 goto no_delegation_unlock;
977
978 if (delegation == NULL)
979 delegation = &deleg_cur->stateid;
f597c537 980 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 981 goto no_delegation_unlock;
982
b7391f44 983 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 984 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 985 ret = 1;
986no_delegation_unlock:
987 spin_unlock(&deleg_cur->lock);
988no_delegation:
989 rcu_read_unlock();
990
991 if (!ret && open_stateid != NULL) {
dc0b027d 992 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 993 ret = 1;
994 }
995
996 return ret;
997}
998
999
dc0b027d 1000static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1001{
1002 struct nfs_delegation *delegation;
1003
1004 rcu_read_lock();
1005 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1006 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1007 rcu_read_unlock();
1008 return;
1009 }
1010 rcu_read_unlock();
57ec14c5 1011 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1012}
1013
6ee41268 1014static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1015{
1016 struct nfs4_state *state = opendata->state;
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *delegation;
536e43d1 1019 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1020 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1021 nfs4_stateid stateid;
1022 int ret = -EAGAIN;
1023
aac00a8d 1024 for (;;) {
dc0b027d 1025 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1026 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1027 if (can_open_cached(state, fmode, open_mode)) {
1028 update_open_stateflags(state, fmode);
6ee41268 1029 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1030 goto out_return_state;
1031 }
1032 spin_unlock(&state->owner->so_lock);
1033 }
34310430
TM		 1034 rcu_read_lock();
1035 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1036 if (!can_open_delegated(delegation, fmode)) {
34310430 1037 rcu_read_unlock();
aac00a8d 1038 break;
34310430 1039 }
aac00a8d 1040 /* Save the delegation */
f597c537 1041 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1042 rcu_read_unlock();
af22f94a 1043 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1044 if (ret != 0)
1045 goto out;
1046 ret = -EAGAIN;
34310430
TM		 1047
1048 /* Try to update the stateid using the delegation */
dc0b027d 1049 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1050 goto out_return_state;
aac00a8d 1051 }
aac00a8d
TM		 1052out:
1053 return ERR_PTR(ret);
1054out_return_state:
1055 atomic_inc(&state->count);
1056 return state;
1057}
1058
e23008ec
AA		 1059static void
1060nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1061{
1062 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1063 struct nfs_delegation *delegation;
1064 int delegation_flags = 0;
1065
1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1068 if (delegation)
1069 delegation_flags = delegation->flags;
1070 rcu_read_unlock();
1071 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1072 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1073 "returning a delegation for "
1074 "OPEN(CLAIM_DELEGATE_CUR)\n",
1075 clp->cl_hostname);
1076 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1077 nfs_inode_set_delegation(state->inode,
1078 data->owner->so_cred,
1079 &data->o_res);
1080 else
1081 nfs_inode_reclaim_delegation(state->inode,
1082 data->owner->so_cred,
1083 &data->o_res);
1084}
1085
1086/*
1087 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1088 * and update the nfs4_state.
1089 */
1090static struct nfs4_state *
1091_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1092{
1093 struct inode *inode = data->state->inode;
1094 struct nfs4_state *state = data->state;
1095 int ret;
1096
1097 if (!data->rpc_done) {
1098 ret = data->rpc_status;
1099 goto err;
1100 }
1101
1102 ret = -ESTALE;
1103 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1104 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1105 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1106 goto err;
1107
1108 ret = -ENOMEM;
1109 state = nfs4_get_open_state(inode, data->owner);
1110 if (state == NULL)
1111 goto err;
1112
1113 ret = nfs_refresh_inode(inode, &data->f_attr);
1114 if (ret)
1115 goto err;
1116
1117 if (data->o_res.delegation_type != 0)
1118 nfs4_opendata_check_deleg(data, state);
1119 update_open_stateid(state, &data->o_res.stateid, NULL,
1120 data->o_arg.fmode);
1121
1122 return state;
1123err:
1124 return ERR_PTR(ret);
1125
1126}
1127
1128static struct nfs4_state *
1129_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1130{
1131 struct inode *inode;
1132 struct nfs4_state *state = NULL;
1b370bc2 1133 int ret;
24ac23ab 1134
aac00a8d 1135 if (!data->rpc_done) {
6ee41268 1136 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1137 goto out;
1138 }
1139
1b370bc2 1140 ret = -EAGAIN;
24ac23ab 1141 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1142 goto err;
24ac23ab 1143 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1144 ret = PTR_ERR(inode);
03f28e3a 1145 if (IS_ERR(inode))
1b370bc2
TM		 1146 goto err;
1147 ret = -ENOMEM;
24ac23ab
TM		 1148 state = nfs4_get_open_state(inode, data->owner);
1149 if (state == NULL)
1b370bc2 1150 goto err_put_inode;
e23008ec
AA		 1151 if (data->o_res.delegation_type != 0)
1152 nfs4_opendata_check_deleg(data, state);
34310430 1153 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1154 data->o_arg.fmode);
24ac23ab 1155 iput(inode);
aac00a8d 1156out:
24ac23ab 1157 return state;
1b370bc2
TM		 1158err_put_inode:
1159 iput(inode);
1160err:
1161 return ERR_PTR(ret);
24ac23ab
TM		 1162}
1163
e23008ec
AA		 1164static struct nfs4_state *
1165nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1166{
1167 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1168 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1169 return _nfs4_opendata_to_nfs4_state(data);
1170}
1171
864472e9
TM		 1172static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1173{
1174 struct nfs_inode *nfsi = NFS_I(state->inode);
1175 struct nfs_open_context *ctx;
1176
1177 spin_lock(&state->inode->i_lock);
1178 list_for_each_entry(ctx, &nfsi->open_files, list) {
1179 if (ctx->state != state)
1180 continue;
1181 get_nfs_open_context(ctx);
1182 spin_unlock(&state->inode->i_lock);
1183 return ctx;
1184 }
1185 spin_unlock(&state->inode->i_lock);
1186 return ERR_PTR(-ENOENT);
1187}
1188
6f220ed5
TM		 1189static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1190{
1191 struct nfs4_opendata *opendata;
1192
3d4ff43d 1193 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1194 if (opendata == NULL)
1195 return ERR_PTR(-ENOMEM);
1196 opendata->state = state;
1197 atomic_inc(&state->count);
1198 return opendata;
1199}
1200
dc0b027d 1201static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1202{
2ced46c2 1203 struct nfs4_state *newstate;
864472e9
TM		 1204 int ret;
1205
dc0b027d
TM		 1206 opendata->o_arg.open_flags = 0;
1207 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1208 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1209 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1210 nfs4_init_opendata_res(opendata);
b257957e 1211 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1212 if (ret != 0)
1213 return ret;
2ced46c2 1214 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1215 if (IS_ERR(newstate))
1216 return PTR_ERR(newstate);
643168c2 1217 nfs4_close_state(newstate, fmode);
2ced46c2 1218 *res = newstate;
864472e9
TM		 1219 return 0;
1220}
1221
1222static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1223{
864472e9 1224 struct nfs4_state *newstate;
864472e9
TM		 1225 int ret;
1226
1227 /* memory barrier prior to reading state->n_* */
2ced46c2 1228 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1229 smp_rmb();
1230 if (state->n_rdwr != 0) {
b0ed9dbc 1231 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1232 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1233 if (ret != 0)
1234 return ret;
2ced46c2
TM		 1235 if (newstate != state)
1236 return -ESTALE;
864472e9
TM		 1237 }
1238 if (state->n_wronly != 0) {
b0ed9dbc 1239 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1240 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1241 if (ret != 0)
1242 return ret;
2ced46c2
TM		 1243 if (newstate != state)
1244 return -ESTALE;
864472e9
TM		 1245 }
1246 if (state->n_rdonly != 0) {
b0ed9dbc 1247 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1248 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1249 if (ret != 0)
1250 return ret;
2ced46c2
TM		 1251 if (newstate != state)
1252 return -ESTALE;
864472e9 1253 }
1ac7e2fd
TM		 1254 /*
1255 * We may have performed cached opens for all three recoveries.
1256 * Check if we need to update the current stateid.
1257 */
1258 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1259 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1260 write_seqlock(&state->seqlock);
1ac7e2fd 1261 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1262 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1263 write_sequnlock(&state->seqlock);
1ac7e2fd 1264 }
864472e9
TM		 1265 return 0;
1266}
1267
1da177e4
LT		 1268/*
1269 * OPEN_RECLAIM:
1270 * reclaim state on the server after a reboot.
1da177e4 1271 */
539cd03a 1272static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1273{
1ac7e2fd 1274 struct nfs_delegation *delegation;
864472e9 1275 struct nfs4_opendata *opendata;
dc0b027d 1276 fmode_t delegation_type = 0;
1da177e4
LT		 1277 int status;
1278
6f220ed5
TM		 1279 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1280 if (IS_ERR(opendata))
1281 return PTR_ERR(opendata);
864472e9
TM		 1282 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1283 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1284 rcu_read_lock();
1285 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1286 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1287 delegation_type = delegation->type;
1ac7e2fd 1288 rcu_read_unlock();
864472e9
TM		 1289 opendata->o_arg.u.delegation_type = delegation_type;
1290 status = nfs4_open_recover(opendata, state);
c6d00e63 1291 nfs4_opendata_put(opendata);
1da177e4
LT		 1292 return status;
1293}
1294
539cd03a 1295static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1296{
1297 struct nfs_server *server = NFS_SERVER(state->inode);
1298 struct nfs4_exception exception = { };
1299 int err;
1300 do {
539cd03a 1301 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1302 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1303 break;
1304 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1305 } while (exception.retry);
1306 return err;
1307}
1308
864472e9
TM		 1309static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1310{
1311 struct nfs_open_context *ctx;
1312 int ret;
1313
1314 ctx = nfs4_state_find_open_context(state);
1315 if (IS_ERR(ctx))
1316 return PTR_ERR(ctx);
539cd03a 1317 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1318 put_nfs_open_context(ctx);
1319 return ret;
1320}
1321
13437e12 1322static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1323{
e56e0b78 1324 struct nfs4_opendata *opendata;
864472e9 1325 int ret;
1da177e4 1326
6f220ed5
TM		 1327 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1328 if (IS_ERR(opendata))
1329 return PTR_ERR(opendata);
e56e0b78 1330 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1331 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1332 ret = nfs4_open_recover(opendata, state);
c6d00e63 1333 nfs4_opendata_put(opendata);
864472e9 1334 return ret;
1da177e4
LT		 1335}
1336
13437e12 1337int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1338{
1339 struct nfs4_exception exception = { };
539cd03a 1340 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1341 int err;
1342 do {
13437e12 1343 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1344 switch (err) {
1345 case 0:
965b5d67
TM		 1346 case -ENOENT:
1347 case -ESTALE:
1348 goto out;
bcfa49f6
RL		 1349 case -NFS4ERR_BADSESSION:
1350 case -NFS4ERR_BADSLOT:
1351 case -NFS4ERR_BAD_HIGH_SLOT:
1352 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1353 case -NFS4ERR_DEADSESSION:
9f594791 1354 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1355 goto out;
1da177e4
LT		 1356 case -NFS4ERR_STALE_CLIENTID:
1357 case -NFS4ERR_STALE_STATEID:
1358 case -NFS4ERR_EXPIRED:
1359 /* Don't recall a delegation if it was lost */
0400a6b0 1360 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1361 goto out;
1362 case -ERESTARTSYS:
1363 /*
1364 * The show must go on: exit, but mark the
1365 * stateid as needing recovery.
1366 */
a1d0b5ee 1367 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1368 case -NFS4ERR_ADMIN_REVOKED:
1369 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1370 nfs_inode_find_state_and_recover(state->inode,
1371 stateid);
0400a6b0 1372 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1373 case -ENOMEM:
1374 err = 0;
1375 goto out;
1da177e4
LT		 1376 }
1377 err = nfs4_handle_exception(server, err, &exception);
1378 } while (exception.retry);
965b5d67 1379out:
1da177e4
LT		 1380 return err;
1381}
1382
cdd4e68b
TM		 1383static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1384{
1385 struct nfs4_opendata *data = calldata;
1386
1387 data->rpc_status = task->tk_status;
26e976a8 1388 if (data->rpc_status == 0) {
f597c537 1389 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1390 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1391 renew_lease(data->o_res.server, data->timestamp);
3e309914 1392 data->rpc_done = 1;
26e976a8 1393 }
cdd4e68b
TM		 1394}
1395
1396static void nfs4_open_confirm_release(void *calldata)
1397{
1398 struct nfs4_opendata *data = calldata;
1399 struct nfs4_state *state = NULL;
1400
1401 /* If this request hasn't been cancelled, do nothing */
1402 if (data->cancelled == 0)
1403 goto out_free;
1404 /* In case of error, no cleanup! */
3e309914 1405 if (!data->rpc_done)
cdd4e68b 1406 goto out_free;
cdd4e68b 1407 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1408 if (!IS_ERR(state))
643168c2 1409 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1410out_free:
c6d00e63 1411 nfs4_opendata_put(data);
cdd4e68b
TM		 1412}
1413
1414static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1415 .rpc_call_done = nfs4_open_confirm_done,
1416 .rpc_release = nfs4_open_confirm_release,
1417};
1418
1419/*
1420 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1421 */
1422static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1423{
1424 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1425 struct rpc_task *task;
5138fde0
TM		 1426 struct rpc_message msg = {
1427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1428 .rpc_argp = &data->c_arg,
1429 .rpc_resp = &data->c_res,
1430 .rpc_cred = data->owner->so_cred,
1431 };
c970aa85
TM		 1432 struct rpc_task_setup task_setup_data = {
1433 .rpc_client = server->client,
5138fde0 1434 .rpc_message = &msg,
c970aa85
TM		 1435 .callback_ops = &nfs4_open_confirm_ops,
1436 .callback_data = data,
101070ca 1437 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1438 .flags = RPC_TASK_ASYNC,
1439 };
1da177e4
LT		 1440 int status;
1441
c6d00e63 1442 kref_get(&data->kref);
3e309914
TM		 1443 data->rpc_done = 0;
1444 data->rpc_status = 0;
5138fde0 1445 data->timestamp = jiffies;
c970aa85 1446 task = rpc_run_task(&task_setup_data);
7a1218a2 1447 if (IS_ERR(task))
cdd4e68b 1448 return PTR_ERR(task);
cdd4e68b
TM		 1449 status = nfs4_wait_for_completion_rpc_task(task);
1450 if (status != 0) {
1451 data->cancelled = 1;
1452 smp_wmb();
1453 } else
1454 status = data->rpc_status;
e6b3c4db 1455 rpc_put_task(task);
1da177e4
LT		 1456 return status;
1457}
1458
24ac23ab 1459static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1460{
24ac23ab
TM		 1461 struct nfs4_opendata *data = calldata;
1462 struct nfs4_state_owner *sp = data->owner;
5138fde0 1463
24ac23ab
TM		 1464 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1465 return;
aac00a8d
TM		 1466 /*
1467 * Check if we still need to send an OPEN call, or if we can use
1468 * a delegation instead.
1469 */
1470 if (data->state != NULL) {
1471 struct nfs_delegation *delegation;
1472
dc0b027d 1473 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1474 goto out_no_action;
aac00a8d
TM		 1475 rcu_read_lock();
1476 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1477 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1478 can_open_delegated(delegation, data->o_arg.fmode))
1479 goto unlock_no_action;
aac00a8d
TM		 1480 rcu_read_unlock();
1481 }
95b72eb0 1482 /* Update client id. */
1f0e890d 1483 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1484 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1485 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1486 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1487 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1488 }
26e976a8 1489 data->timestamp = jiffies;
035168ab 1490 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1491 &data->o_arg.seq_args,
2240a9e2
TM		 1492 &data->o_res.seq_res,
1493 task) != 0)
1494 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1495 return;
652f89f6
TM		 1496unlock_no_action:
1497 rcu_read_unlock();
6ee41268
TM		 1498out_no_action:
1499 task->tk_action = NULL;
b75ad4cd 1500 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1501}
1502
24ac23ab
TM		 1503static void nfs4_open_done(struct rpc_task *task, void *calldata)
1504{
1505 struct nfs4_opendata *data = calldata;
1da177e4 1506
24ac23ab 1507 data->rpc_status = task->tk_status;
d898528c 1508
14516c3a
TM		 1509 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1510 return;
d898528c 1511
24ac23ab 1512 if (task->tk_status == 0) {
807d66d8
TM		 1513 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1514 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1515 case S_IFREG:
1516 break;
1517 case S_IFLNK:
24ac23ab 1518 data->rpc_status = -ELOOP;
6f926b5b
TM		 1519 break;
1520 case S_IFDIR:
24ac23ab 1521 data->rpc_status = -EISDIR;
6f926b5b
TM		 1522 break;
1523 default:
24ac23ab 1524 data->rpc_status = -ENOTDIR;
807d66d8 1525 }
6f926b5b 1526 }
26e976a8 1527 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1528 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1529 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1530 }
3e309914 1531 data->rpc_done = 1;
24ac23ab 1532}
6f926b5b 1533
24ac23ab
TM		 1534static void nfs4_open_release(void *calldata)
1535{
1536 struct nfs4_opendata *data = calldata;
1537 struct nfs4_state *state = NULL;
1538
1539 /* If this request hasn't been cancelled, do nothing */
1540 if (data->cancelled == 0)
1541 goto out_free;
1542 /* In case of error, no cleanup! */
3e309914 1543 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1544 goto out_free;
1545 /* In case we need an open_confirm, no cleanup! */
1546 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1547 goto out_free;
24ac23ab 1548 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1549 if (!IS_ERR(state))
643168c2 1550 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1551out_free:
c6d00e63 1552 nfs4_opendata_put(data);
24ac23ab
TM		 1553}
1554
1555static const struct rpc_call_ops nfs4_open_ops = {
1556 .rpc_call_prepare = nfs4_open_prepare,
1557 .rpc_call_done = nfs4_open_done,
1558 .rpc_release = nfs4_open_release,
1559};
1560
b257957e 1561static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1562{
1563 struct inode *dir = data->dir->d_inode;
1564 struct nfs_server *server = NFS_SERVER(dir);
1565 struct nfs_openargs *o_arg = &data->o_arg;
1566 struct nfs_openres *o_res = &data->o_res;
1567 struct rpc_task *task;
5138fde0
TM		 1568 struct rpc_message msg = {
1569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1570 .rpc_argp = o_arg,
1571 .rpc_resp = o_res,
1572 .rpc_cred = data->owner->so_cred,
1573 };
c970aa85
TM		 1574 struct rpc_task_setup task_setup_data = {
1575 .rpc_client = server->client,
5138fde0 1576 .rpc_message = &msg,
c970aa85
TM		 1577 .callback_ops = &nfs4_open_ops,
1578 .callback_data = data,
101070ca 1579 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1580 .flags = RPC_TASK_ASYNC,
1581 };
24ac23ab
TM		 1582 int status;
1583
9d12b216 1584 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1585 kref_get(&data->kref);
3e309914
TM		 1586 data->rpc_done = 0;
1587 data->rpc_status = 0;
2ced46c2 1588 data->cancelled = 0;
b257957e 1589 if (isrecover)
8fe72bac 1590 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1591 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1592 if (IS_ERR(task))
1593 return PTR_ERR(task);
1594 status = nfs4_wait_for_completion_rpc_task(task);
1595 if (status != 0) {
1596 data->cancelled = 1;
1597 smp_wmb();
1598 } else
1599 status = data->rpc_status;
1600 rpc_put_task(task);
1601
1602 return status;
1603}
1604
1605static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1606{
1607 struct inode *dir = data->dir->d_inode;
1608 struct nfs_openres *o_res = &data->o_res;
1609 int status;
1610
1611 status = nfs4_run_open_task(data, 1);
1612 if (status != 0 || !data->rpc_done)
1613 return status;
1614
6926afd1
TM		 1615 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1616
b257957e
AB		 1617 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1618 status = _nfs4_proc_open_confirm(data);
1619 if (status != 0)
1620 return status;
1621 }
1622
1623 return status;
1624}
1625
6168f62c
WAA		 1626static int nfs4_opendata_access(struct rpc_cred *cred,
1627 struct nfs4_opendata *opendata,
1628 struct nfs4_state *state, fmode_t fmode)
1629{
1630 struct nfs_access_entry cache;
1631 u32 mask;
1632
1633 /* access call failed or for some reason the server doesn't
1634 * support any access modes -- defer access call until later */
1635 if (opendata->o_res.access_supported == 0)
1636 return 0;
1637
1638 mask = 0;
bbd3a8ee
WAA		 1639 /* don't check MAY_WRITE - a newly created file may not have
1640 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1641 if (fmode & FMODE_READ)
1642 mask |= MAY_READ;
6168f62c
WAA		 1643 if (fmode & FMODE_EXEC)
1644 mask |= MAY_EXEC;
1645
1646 cache.cred = cred;
1647 cache.jiffies = jiffies;
1648 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1649 nfs_access_add_cache(state->inode, &cache);
1650
bbd3a8ee 1651 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1652 return 0;
1653
1654 /* even though OPEN succeeded, access is denied. Close the file */
1655 nfs4_close_state(state, fmode);
998f40b5 1656 return -EACCES;
6168f62c
WAA		 1657}
1658
b257957e
AB		 1659/*
1660 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1661 */
1662static int _nfs4_proc_open(struct nfs4_opendata *data)
1663{
1664 struct inode *dir = data->dir->d_inode;
1665 struct nfs_server *server = NFS_SERVER(dir);
1666 struct nfs_openargs *o_arg = &data->o_arg;
1667 struct nfs_openres *o_res = &data->o_res;
1668 int status;
1669
1670 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1671 if (!data->rpc_done)
1672 return status;
1673 if (status != 0) {
1674 if (status == -NFS4ERR_BADNAME &&
1675 !(o_arg->open_flags & O_CREAT))
1676 return -ENOENT;
24ac23ab 1677 return status;
08ef7bd3 1678 }
24ac23ab 1679
6926afd1
TM		 1680 nfs_fattr_map_and_free_names(server, &data->f_attr);
1681
90ff0c54 1682 if (o_arg->open_flags & O_CREAT)
56ae19f3 1683 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1684 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1685 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1686 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1687 status = _nfs4_proc_open_confirm(data);
1da177e4 1688 if (status != 0)
24ac23ab 1689 return status;
1da177e4
LT		 1690 }
1691 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1692 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1693 return 0;
1da177e4
LT		 1694}
1695
d83217c1
AA		 1696static int nfs4_recover_expired_lease(struct nfs_server *server)
1697{
1698 return nfs4_client_recover_expired_lease(server->nfs_client);
1699}
1700
1da177e4
LT		 1701/*
1702 * OPEN_EXPIRED:
1703 * reclaim state on the server after a network partition.
1704 * Assumes caller holds the appropriate lock
1705 */
539cd03a 1706static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1707{
e56e0b78 1708 struct nfs4_opendata *opendata;
864472e9 1709 int ret;
1da177e4 1710
6f220ed5
TM		 1711 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1712 if (IS_ERR(opendata))
1713 return PTR_ERR(opendata);
864472e9 1714 ret = nfs4_open_recover(opendata, state);
35d05778 1715 if (ret == -ESTALE)
3d4ff43d 1716 d_drop(ctx->dentry);
c6d00e63 1717 nfs4_opendata_put(opendata);
864472e9 1718 return ret;
1da177e4
LT		 1719}
1720
a9ed2e25 1721static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1722{
539cd03a 1723 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1724 struct nfs4_exception exception = { };
1725 int err;
1726
1727 do {
539cd03a 1728 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1729 switch (err) {
1730 default:
1731 goto out;
1732 case -NFS4ERR_GRACE:
1733 case -NFS4ERR_DELAY:
1734 nfs4_handle_exception(server, err, &exception);
1735 err = 0;
1736 }
202b50dc 1737 } while (exception.retry);
a9ed2e25 1738out:
202b50dc
TM		 1739 return err;
1740}
1741
1da177e4
LT		 1742static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1743{
1da177e4 1744 struct nfs_open_context *ctx;
864472e9 1745 int ret;
1da177e4 1746
864472e9
TM		 1747 ctx = nfs4_state_find_open_context(state);
1748 if (IS_ERR(ctx))
1749 return PTR_ERR(ctx);
539cd03a 1750 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1751 put_nfs_open_context(ctx);
1752 return ret;
1da177e4
LT		 1753}
1754
f062eb6c 1755#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1756static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1757{
f062eb6c 1758 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1759 nfs4_stateid *stateid = &state->stateid;
1760 int status;
1761
1762 /* If a state reset has been done, test_stateid is unneeded */
1763 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1764 return;
1765
1766 status = nfs41_test_stateid(server, stateid);
1767 if (status != NFS_OK) {
1768 /* Free the stateid unless the server explicitly
1769 * informs us the stateid is unrecognized. */
1770 if (status != -NFS4ERR_BAD_STATEID)
1771 nfs41_free_stateid(server, stateid);
6938867e 1772 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1773
6938867e
BS		 1774 write_seqlock(&state->seqlock);
1775 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1776 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1777 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1778 }
1779}
1780
1781/**
1782 * nfs41_check_open_stateid - possibly free an open stateid
1783 *
1784 * @state: NFSv4 state for an inode
1785 *
1786 * Returns NFS_OK if recovery for this stateid is now finished.
1787 * Otherwise a negative NFS4ERR value is returned.
1788 */
1789static int nfs41_check_open_stateid(struct nfs4_state *state)
1790{
1791 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1792 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1793 int status;
1794
1795 /* If a state reset has been done, test_stateid is unneeded */
1796 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1797 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1799 return -NFS4ERR_BAD_STATEID;
1800
1801 status = nfs41_test_stateid(server, stateid);
1802 if (status != NFS_OK) {
1803 /* Free the stateid unless the server explicitly
1804 * informs us the stateid is unrecognized. */
1805 if (status != -NFS4ERR_BAD_STATEID)
1806 nfs41_free_stateid(server, stateid);
1807
1808 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1809 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1811 }
1812 return status;
1813}
1814
1815static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1816{
eb64cf96 1817 int status;
b01dd1d8 1818
3e60ffdd
CL		 1819 nfs41_clear_delegation_stateid(state);
1820 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1821 if (status != NFS_OK)
1822 status = nfs4_open_expired(sp, state);
1823 return status;
f062eb6c
BS		 1824}
1825#endif
1826
aa53ed54
JL		 1827/*
1828 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1829 * fields corresponding to attributes that were used to store the verifier.
1830 * Make sure we clobber those fields in the later setattr call
1831 */
1832static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1833{
1834 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1835 !(sattr->ia_valid & ATTR_ATIME_SET))
1836 sattr->ia_valid |= ATTR_ATIME;
1837
1838 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1839 !(sattr->ia_valid & ATTR_MTIME_SET))
1840 sattr->ia_valid |= ATTR_MTIME;
1841}
1842
1da177e4 1843/*
24ac23ab 1844 * Returns a referenced nfs4_state
1da177e4 1845 */
82be417a
AA		 1846static int _nfs4_do_open(struct inode *dir,
1847 struct dentry *dentry,
1848 fmode_t fmode,
1849 int flags,
1850 struct iattr *sattr,
1851 struct rpc_cred *cred,
1852 struct nfs4_state **res,
1853 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1854{
1855 struct nfs4_state_owner *sp;
1856 struct nfs4_state *state = NULL;
1857 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1858 struct nfs4_opendata *opendata;
aac00a8d 1859 int status;
1da177e4
LT		 1860
1861 /* Protect against reboot recovery conflicts */
1da177e4 1862 status = -ENOMEM;
d1e284d5
TM		 1863 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1864 if (sp == NULL) {
1da177e4
LT		 1865 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1866 goto out_err;
1867 }
58d9714a
TM		 1868 status = nfs4_recover_expired_lease(server);
1869 if (status != 0)
b4454fe1 1870 goto err_put_state_owner;
82a2c1b7
AV		 1871 if (dentry->d_inode != NULL)
1872 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1873 status = -ENOMEM;
82a2c1b7 1874 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1875 if (opendata == NULL)
95d35cb4 1876 goto err_put_state_owner;
1da177e4 1877
82be417a
AA		 1878 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1879 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1880 if (!opendata->f_attr.mdsthreshold)
1881 goto err_opendata_put;
1549210f 1882 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1883 }
82a2c1b7
AV		 1884 if (dentry->d_inode != NULL)
1885 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1886
24ac23ab 1887 status = _nfs4_proc_open(opendata);
1da177e4 1888 if (status != 0)
c6d00e63 1889 goto err_opendata_put;
1da177e4 1890
24ac23ab 1891 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1892 status = PTR_ERR(state);
1893 if (IS_ERR(state))
c6d00e63 1894 goto err_opendata_put;
0df5dd4a 1895 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1896 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1897
6168f62c
WAA		 1898 status = nfs4_opendata_access(cred, opendata, state, fmode);
1899 if (status != 0)
1900 goto err_opendata_put;
1901
0ab64e0e
TM		 1902 if (opendata->o_arg.open_flags & O_EXCL) {
1903 nfs4_exclusive_attrset(opendata, sattr);
1904
1905 nfs_fattr_init(opendata->o_res.f_attr);
1906 status = nfs4_do_setattr(state->inode, cred,
1907 opendata->o_res.f_attr, sattr,
1908 state);
1909 if (status == 0)
1910 nfs_setattr_update_inode(state->inode, sattr);
1911 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1912 }
82be417a
AA		 1913
1914 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1915 *ctx_th = opendata->f_attr.mdsthreshold;
1916 else
1917 kfree(opendata->f_attr.mdsthreshold);
1918 opendata->f_attr.mdsthreshold = NULL;
1919
c6d00e63 1920 nfs4_opendata_put(opendata);
1da177e4 1921 nfs4_put_state_owner(sp);
1da177e4
LT		 1922 *res = state;
1923 return 0;
c6d00e63 1924err_opendata_put:
82be417a 1925 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1926 nfs4_opendata_put(opendata);
e56e0b78
TM		 1927err_put_state_owner:
1928 nfs4_put_state_owner(sp);
1da177e4 1929out_err:
1da177e4
LT		 1930 *res = NULL;
1931 return status;
1932}
1933
1934
82be417a
AA		 1935static struct nfs4_state *nfs4_do_open(struct inode *dir,
1936 struct dentry *dentry,
1937 fmode_t fmode,
1938 int flags,
1939 struct iattr *sattr,
1940 struct rpc_cred *cred,
1941 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1942{
1943 struct nfs4_exception exception = { };
1944 struct nfs4_state *res;
1945 int status;
1946
6168f62c 1947 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1948 do {
82be417a
AA		 1949 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1950 &res, ctx_th);
1da177e4
LT		 1951 if (status == 0)
1952 break;
1953 /* NOTE: BAD_SEQID means the server and client disagree about the
1954 * book-keeping w.r.t. state-changing operations
1955 * (OPEN/CLOSE/LOCK/LOCKU...)
1956 * It is actually a sign of a bug on the client or on the server.
1957 *
1958 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1959 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1960 * have unhashed the old state_owner for us, and that we can
1961 * therefore safely retry using a new one. We should still warn
1962 * the user though...
1963 */
1964 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1965 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1966 " returned a bad sequence-id error!\n",
1967 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1968 exception.retry = 1;
1969 continue;
1970 }
550f5747
TM		 1971 /*
1972 * BAD_STATEID on OPEN means that the server cancelled our
1973 * state before it received the OPEN_CONFIRM.
1974 * Recover by retrying the request as per the discussion
1975 * on Page 181 of RFC3530.
1976 */
1977 if (status == -NFS4ERR_BAD_STATEID) {
1978 exception.retry = 1;
1979 continue;
1980 }
aac00a8d
TM		 1981 if (status == -EAGAIN) {
1982 /* We must have found a delegation */
1983 exception.retry = 1;
1984 continue;
1985 }
1da177e4
LT		 1986 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1987 status, &exception));
1988 } while (exception.retry);
1989 return res;
1990}
1991
659bfcd6
TM		 1992static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1993 struct nfs_fattr *fattr, struct iattr *sattr,
1994 struct nfs4_state *state)
1da177e4 1995{
3e4f6290 1996 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1997 struct nfs_setattrargs arg = {
3e4f6290 1998 .fh = NFS_FH(inode),
1da177e4
LT		 1999 .iap = sattr,
2000 .server = server,
2001 .bitmask = server->attr_bitmask,
2002 };
2003 struct nfs_setattrres res = {
2004 .fattr = fattr,
2005 .server = server,
2006 };
2007 struct rpc_message msg = {
659bfcd6
TM		 2008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2009 .rpc_argp = &arg,
2010 .rpc_resp = &res,
2011 .rpc_cred = cred,
1da177e4 2012 };
26e976a8 2013 unsigned long timestamp = jiffies;
65e4308d 2014 int status;
1da177e4 2015
0e574af1 2016 nfs_fattr_init(fattr);
1da177e4 2017
4fc8796d 2018 if (state != NULL) {
2a369153
TM		 2019 struct nfs_lockowner lockowner = {
2020 .l_owner = current->files,
2021 .l_pid = current->tgid,
2022 };
4fc8796d 2023 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2024 &lockowner);
4fc8796d
TM		 2025 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2026 FMODE_WRITE)) {
3e4f6290 2027 /* Use that stateid */
08e9eac4 2028 } else
f597c537 2029 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2030
7c513058 2031 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2032 if (status == 0 && state != NULL)
2033 renew_lease(server, timestamp);
65e4308d 2034 return status;
1da177e4
LT		 2035}
2036
659bfcd6
TM		 2037static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2038 struct nfs_fattr *fattr, struct iattr *sattr,
2039 struct nfs4_state *state)
1da177e4 2040{
3e4f6290 2041 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2042 struct nfs4_exception exception = {
2043 .state = state,
3114ea7a 2044 .inode = inode,
a1d0b5ee 2045 };
1da177e4
LT		 2046 int err;
2047 do {
451146be
TM		 2048 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2049 switch (err) {
2050 case -NFS4ERR_OPENMODE:
2051 if (state && !(state->state & FMODE_WRITE)) {
2052 err = -EBADF;
2053 if (sattr->ia_valid & ATTR_OPEN)
2054 err = -EACCES;
2055 goto out;
2056 }
2057 }
2058 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2059 } while (exception.retry);
451146be 2060out:
1da177e4
LT		 2061 return err;
2062}
2063
2064struct nfs4_closedata {
2065 struct inode *inode;
2066 struct nfs4_state *state;
2067 struct nfs_closeargs arg;
2068 struct nfs_closeres res;
516a6af6 2069 struct nfs_fattr fattr;
26e976a8 2070 unsigned long timestamp;
f7e8917a
FI		 2071 bool roc;
2072 u32 roc_barrier;
1da177e4
LT		 2073};
2074
963d8fe5 2075static void nfs4_free_closedata(void *data)
9512135d 2076{
963d8fe5
TM		 2077 struct nfs4_closedata *calldata = data;
2078 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2079 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2080
f7e8917a
FI		 2081 if (calldata->roc)
2082 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2083 nfs4_put_open_state(calldata->state);
2084 nfs_free_seqid(calldata->arg.seqid);
9512135d 2085 nfs4_put_state_owner(sp);
324d003b 2086 nfs_sb_deactive_async(sb);
9512135d
TM		 2087 kfree(calldata);
2088}
2089
88069f77
TM		 2090static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2091 fmode_t fmode)
2092{
2093 spin_lock(&state->owner->so_lock);
2094 if (!(fmode & FMODE_READ))
2095 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2096 if (!(fmode & FMODE_WRITE))
2097 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2099 spin_unlock(&state->owner->so_lock);
2100}
2101
963d8fe5 2102static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2103{
963d8fe5 2104 struct nfs4_closedata *calldata = data;
1da177e4 2105 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2106 struct nfs_server *server = NFS_SERVER(calldata->inode);
2107
a3ca5651 2108 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2109 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2110 return;
1da177e4
LT		 2111 /* hmm. we are done with the inode, and in the process of freeing
2112 * the state_owner. we keep this around to process errors
2113 */
1da177e4
LT		 2114 switch (task->tk_status) {
2115 case 0:
f7e8917a
FI		 2116 if (calldata->roc)
2117 pnfs_roc_set_barrier(state->inode,
2118 calldata->roc_barrier);
45328c35 2119 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2120 renew_lease(server, calldata->timestamp);
88069f77
TM		 2121 nfs4_close_clear_stateid_flags(state,
2122 calldata->arg.fmode);
1da177e4
LT		 2123 break;
2124 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2125 case -NFS4ERR_OLD_STATEID:
2126 case -NFS4ERR_BAD_STATEID:
1da177e4 2127 case -NFS4ERR_EXPIRED:
dc0b027d 2128 if (calldata->arg.fmode == 0)
9e33bed5 2129 break;
1da177e4 2130 default:
72211dbe
TM		 2131 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2132 rpc_restart_call_prepare(task);
1da177e4 2133 }
72211dbe 2134 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2135 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2136 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2137}
2138
4ce70ada 2139static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2140{
4ce70ada 2141 struct nfs4_closedata *calldata = data;
9512135d 2142 struct nfs4_state *state = calldata->state;
7fdab069 2143 struct inode *inode = calldata->inode;
88069f77 2144 int call_close = 0;
9512135d 2145
a3ca5651 2146 dprintk("%s: begin!\n", __func__);
963d8fe5 2147 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2148 return;
003707c7 2149
88069f77
TM		 2150 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2151 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2152 spin_lock(&state->owner->so_lock);
003707c7 2153 /* Calculate the change in open mode */
e7616923 2154 if (state->n_rdwr == 0) {
003707c7 2155 if (state->n_rdonly == 0) {
88069f77
TM		 2156 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2157 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2158 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2159 }
2160 if (state->n_wronly == 0) {
88069f77
TM		 2161 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2162 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2163 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2164 }
e7616923 2165 }
4cecb76f 2166 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2167
2168 if (!call_close) {
963d8fe5
TM		 2169 /* Note: exit _without_ calling nfs4_close_done */
2170 task->tk_action = NULL;
b75ad4cd 2171 nfs4_sequence_done(task, &calldata->res.seq_res);
a3ca5651 2172 goto out;
9512135d 2173 }
88069f77 2174
f7e8917a 2175 if (calldata->arg.fmode == 0) {
88069f77 2176 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2177 if (calldata->roc &&
7fdab069 2178 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2179 goto out;
f7e8917a 2180 }
88069f77 2181
516a6af6 2182 nfs_fattr_init(calldata->res.fattr);
26e976a8 2183 calldata->timestamp = jiffies;
7fdab069 2184 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2185 &calldata->arg.seq_args,
2186 &calldata->res.seq_res,
2240a9e2
TM		 2187 task) != 0)
2188 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2189out:
2190 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2191}
2192
963d8fe5 2193static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2194 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2195 .rpc_call_done = nfs4_close_done,
2196 .rpc_release = nfs4_free_closedata,
2197};
2198
1da177e4
LT		 2199/*
2200 * It is possible for data to be read/written from a mem-mapped file
2201 * after the sys_close call (which hits the vfs layer as a flush).
2202 * This means that we can't safely call nfsv4 close on a file until
2203 * the inode is cleared. This in turn means that we are not good
2204 * NFSv4 citizens - we do not indicate to the server to update the file's
2205 * share state even when we are done with one of the three share
2206 * stateid's in the inode.
2207 *
2208 * NOTE: Caller must be holding the sp->so_owner semaphore!
2209 */
1f7977c1 2210int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2211{
4a35bd41 2212 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2213 struct nfs4_closedata *calldata;
b39e625b
TM		 2214 struct nfs4_state_owner *sp = state->owner;
2215 struct rpc_task *task;
5138fde0
TM		 2216 struct rpc_message msg = {
2217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2218 .rpc_cred = state->owner->so_cred,
2219 };
c970aa85
TM		 2220 struct rpc_task_setup task_setup_data = {
2221 .rpc_client = server->client,
5138fde0 2222 .rpc_message = &msg,
c970aa85 2223 .callback_ops = &nfs4_close_ops,
101070ca 2224 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2225 .flags = RPC_TASK_ASYNC,
2226 };
9512135d 2227 int status = -ENOMEM;
1da177e4 2228
8535b2be 2229 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2230 if (calldata == NULL)
9512135d 2231 goto out;
9d12b216 2232 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2233 calldata->inode = state->inode;
1da177e4 2234 calldata->state = state;
4a35bd41 2235 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2236 calldata->arg.stateid = &state->open_stateid;
1da177e4 2237 /* Serialization for the sequence id */
8535b2be 2238 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2239 if (calldata->arg.seqid == NULL)
2240 goto out_free_calldata;
dc0b027d 2241 calldata->arg.fmode = 0;
a65318bf 2242 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2243 calldata->res.fattr = &calldata->fattr;
c1d51931 2244 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2245 calldata->res.server = server;
1f7977c1 2246 calldata->roc = pnfs_roc(state->inode);
643168c2 2247 nfs_sb_active(calldata->inode->i_sb);
9512135d 2248
1174dd1f
TM		 2249 msg.rpc_argp = &calldata->arg;
2250 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2251 task_setup_data.callback_data = calldata;
2252 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2253 if (IS_ERR(task))
2254 return PTR_ERR(task);
a49c3c77
TM		 2255 status = 0;
2256 if (wait)
2257 status = rpc_wait_for_completion_task(task);
b39e625b 2258 rpc_put_task(task);
a49c3c77 2259 return status;
9512135d
TM		 2260out_free_calldata:
2261 kfree(calldata);
2262out:
b39e625b
TM		 2263 nfs4_put_open_state(state);
2264 nfs4_put_state_owner(sp);
9512135d 2265 return status;
1da177e4
LT		 2266}
2267
2b484297 2268static struct inode *
cd9a1c0e 2269nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2270{
1da177e4 2271 struct nfs4_state *state;
1da177e4 2272
565277f6 2273 /* Protect against concurrent sillydeletes */
82be417a
AA		 2274 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2275 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2276 if (IS_ERR(state))
2277 return ERR_CAST(state);
cd9a1c0e 2278 ctx->state = state;
f46e0bd3 2279 return igrab(state->inode);
1da177e4
LT		 2280}
2281
1185a552 2282static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2283{
2284 if (ctx->state == NULL)
2285 return;
2286 if (is_sync)
643168c2 2287 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2288 else
643168c2 2289 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2290}
1da177e4
LT		 2291
2292static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2293{
43652ad5
BH		 2294 struct nfs4_server_caps_arg args = {
2295 .fhandle = fhandle,
2296 };
1da177e4
LT		 2297 struct nfs4_server_caps_res res = {};
2298 struct rpc_message msg = {
2299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2300 .rpc_argp = &args,
1da177e4
LT		 2301 .rpc_resp = &res,
2302 };
2303 int status;
2304
7c513058 2305 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2306 if (status == 0) {
2307 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2308 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2309 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2310 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2311 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2312 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2313 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2314 server->caps |= NFS_CAP_ACLS;
2315 if (res.has_links != 0)
2316 server->caps |= NFS_CAP_HARDLINKS;
2317 if (res.has_symlinks != 0)
2318 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2319 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2320 server->caps |= NFS_CAP_FILEID;
2321 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2322 server->caps |= NFS_CAP_MODE;
2323 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2324 server->caps |= NFS_CAP_NLINK;
2325 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2326 server->caps |= NFS_CAP_OWNER;
2327 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2328 server->caps |= NFS_CAP_OWNER_GROUP;
2329 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2330 server->caps |= NFS_CAP_ATIME;
2331 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2332 server->caps |= NFS_CAP_CTIME;
2333 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2334 server->caps |= NFS_CAP_MTIME;
2335
a65318bf
TM		 2336 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2337 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2338 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2339 server->acl_bitmask = res.acl_bitmask;
264e6351 2340 server->fh_expire_type = res.fh_expire_type;
1da177e4 2341 }
cccef3b9 2342
1da177e4
LT		 2343 return status;
2344}
2345
55a97593 2346int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2347{
2348 struct nfs4_exception exception = { };
2349 int err;
2350 do {
2351 err = nfs4_handle_exception(server,
2352 _nfs4_server_capabilities(server, fhandle),
2353 &exception);
2354 } while (exception.retry);
2355 return err;
2356}
2357
2358static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2359 struct nfs_fsinfo *info)
2360{
1da177e4
LT		 2361 struct nfs4_lookup_root_arg args = {
2362 .bitmask = nfs4_fattr_bitmap,
2363 };
2364 struct nfs4_lookup_res res = {
2365 .server = server,
0e574af1 2366 .fattr = info->fattr,
1da177e4
LT		 2367 .fh = fhandle,
2368 };
2369 struct rpc_message msg = {
2370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2371 .rpc_argp = &args,
2372 .rpc_resp = &res,
2373 };
008f55d0 2374
0e574af1 2375 nfs_fattr_init(info->fattr);
7c513058 2376 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2377}
2378
2379static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2380 struct nfs_fsinfo *info)
2381{
2382 struct nfs4_exception exception = { };
2383 int err;
2384 do {
fb8a5ba8
BS		 2385 err = _nfs4_lookup_root(server, fhandle, info);
2386 switch (err) {
2387 case 0:
2388 case -NFS4ERR_WRONGSEC:
05e9cfb4 2389 goto out;
fb8a5ba8
BS		 2390 default:
2391 err = nfs4_handle_exception(server, err, &exception);
2392 }
1da177e4 2393 } while (exception.retry);
05e9cfb4 2394out:
1da177e4
LT		 2395 return err;
2396}
2397
8f70e95f
BS		 2398static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2399 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2400{
2401 struct rpc_auth *auth;
2402 int ret;
2403
2404 auth = rpcauth_create(flavor, server->client);
e8d920c5 2405 if (IS_ERR(auth)) {
8f70e95f
BS		 2406 ret = -EIO;
2407 goto out;
2408 }
2409 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2410out:
2411 return ret;
2412}
2413
801a16dc 2414static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2415 struct nfs_fsinfo *info)
1da177e4 2416{
8f70e95f 2417 int i, len, status = 0;
0fabee24 2418 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2419
6a1a1e34 2420 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2421 if (len < 0)
2422 return len;
8f70e95f
BS		 2423
2424 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2425 /* AUTH_UNIX is the default flavor if none was specified,
2426 * thus has already been tried. */
2427 if (flav_array[i] == RPC_AUTH_UNIX)
2428 continue;
2429
8f70e95f 2430 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2431 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2432 continue;
2433 break;
8f70e95f 2434 }
fb8a5ba8
BS		 2435 /*
2436 * -EACCESS could mean that the user doesn't have correct permissions
2437 * to access the mount. It could also mean that we tried to mount
2438 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2439 * existing mount programs don't handle -EACCES very well so it should
2440 * be mapped to -EPERM instead.
2441 */
2442 if (status == -EACCES)
2443 status = -EPERM;
801a16dc
BS		 2444 return status;
2445}
2446
2447/*
2448 * get the file handle for the "/" directory on the server
2449 */
3028eb2b
BS		 2450int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2451 struct nfs_fsinfo *info)
801a16dc 2452{
fca78d6d 2453 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2454 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2455 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2456 /*
2457 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2458 * by nfs4_map_errors() as this function exits.
2459 */
fca78d6d 2460 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2461 if (status == 0)
2462 status = nfs4_server_capabilities(server, fhandle);
2463 if (status == 0)
2464 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2465 return nfs4_map_errors(status);
1da177e4
LT		 2466}
2467
bae36241
BS		 2468static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2469 struct nfs_fsinfo *info)
2470{
2471 int error;
2472 struct nfs_fattr *fattr = info->fattr;
2473
2474 error = nfs4_server_capabilities(server, mntfh);
2475 if (error < 0) {
2476 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2477 return error;
2478 }
2479
2480 error = nfs4_proc_getattr(server, mntfh, fattr);
2481 if (error < 0) {
2482 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2483 return error;
2484 }
2485
2486 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2487 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2488 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2489
2490 return error;
2491}
2492
6b97fd3d
MN		 2493/*
2494 * Get locations and (maybe) other attributes of a referral.
2495 * Note that we'll actually follow the referral later when
2496 * we detect fsid mismatch in inode revalidation
2497 */
f05d147f
BS		 2498static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2499 const struct qstr *name, struct nfs_fattr *fattr,
2500 struct nfs_fh *fhandle)
6b97fd3d
MN		 2501{
2502 int status = -ENOMEM;
2503 struct page *page = NULL;
2504 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2505
2506 page = alloc_page(GFP_KERNEL);
2507 if (page == NULL)
2508 goto out;
2509 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2510 if (locations == NULL)
2511 goto out;
2512
f05d147f 2513 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2514 if (status != 0)
2515 goto out;
2516 /* Make sure server returned a different fsid for the referral */
2517 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2518 dprintk("%s: server did not return a different fsid for"
2519 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2520 status = -EIO;
2521 goto out;
2522 }
533eb461
AA		 2523 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2524 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2525
533eb461 2526 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2527 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2528 memset(fhandle, 0, sizeof(struct nfs_fh));
2529out:
2530 if (page)
2531 __free_page(page);
5d7ca35a 2532 kfree(locations);
6b97fd3d
MN		 2533 return status;
2534}
2535
1da177e4
LT		 2536static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2537{
2538 struct nfs4_getattr_arg args = {
2539 .fh = fhandle,
2540 .bitmask = server->attr_bitmask,
2541 };
2542 struct nfs4_getattr_res res = {
2543 .fattr = fattr,
2544 .server = server,
2545 };
2546 struct rpc_message msg = {
2547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2548 .rpc_argp = &args,
2549 .rpc_resp = &res,
2550 };
2551
0e574af1 2552 nfs_fattr_init(fattr);
7c513058 2553 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2554}
2555
2556static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2557{
2558 struct nfs4_exception exception = { };
2559 int err;
2560 do {
2561 err = nfs4_handle_exception(server,
2562 _nfs4_proc_getattr(server, fhandle, fattr),
2563 &exception);
2564 } while (exception.retry);
2565 return err;
2566}
2567
2568/*
2569 * The file is not closed if it is opened due to the a request to change
2570 * the size of the file. The open call will not be needed once the
2571 * VFS layer lookup-intents are implemented.
2572 *
2573 * Close is called when the inode is destroyed.
2574 * If we haven't opened the file for O_WRONLY, we
2575 * need to in the size_change case to obtain a stateid.
2576 *
2577 * Got race?
2578 * Because OPEN is always done by name in nfsv4, it is
2579 * possible that we opened a different file by the same
2580 * name. We can recognize this race condition, but we
2581 * can't do anything about it besides returning an error.
2582 *
2583 * This will be fixed with VFS changes (lookup-intent).
2584 */
2585static int
2586nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2587 struct iattr *sattr)
2588{
08e9eac4 2589 struct inode *inode = dentry->d_inode;
659bfcd6 2590 struct rpc_cred *cred = NULL;
d530838b 2591 struct nfs4_state *state = NULL;
1da177e4
LT		 2592 int status;
2593
8a1636c4
BH		 2594 if (pnfs_ld_layoutret_on_setattr(inode))
2595 pnfs_return_layout(inode);
2596
0e574af1 2597 nfs_fattr_init(fattr);
1da177e4 2598
2669940d
AA		 2599 /* Deal with open(O_TRUNC) */
2600 if (sattr->ia_valid & ATTR_OPEN)
2601 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2602
2603 /* Optimization: if the end result is no change, don't RPC */
2604 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2605 return 0;
2606
d530838b 2607 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2608 if (sattr->ia_valid & ATTR_FILE) {
2609 struct nfs_open_context *ctx;
2610
2611 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2612 if (ctx) {
2613 cred = ctx->cred;
2614 state = ctx->state;
2615 }
659bfcd6 2616 }
08e9eac4 2617
659bfcd6 2618 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2619 if (status == 0)
2620 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2621 return status;
2622}
2623
0c2e53f1
TM		 2624static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2625 const struct qstr *name, struct nfs_fh *fhandle,
2626 struct nfs_fattr *fattr)
2b3de441 2627{
0c2e53f1 2628 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2629 int status;
2630 struct nfs4_lookup_arg args = {
2631 .bitmask = server->attr_bitmask,
0c2e53f1 2632 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2633 .name = name,
2634 };
2635 struct nfs4_lookup_res res = {
2636 .server = server,
2637 .fattr = fattr,
2638 .fh = fhandle,
2639 };
2640 struct rpc_message msg = {
2641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2642 .rpc_argp = &args,
2643 .rpc_resp = &res,
2644 };
2645
2646 nfs_fattr_init(fattr);
2647
1da177e4 2648 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2649 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2650 dprintk("NFS reply lookup: %d\n", status);
2651 return status;
2652}
2653
72de53ec 2654static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2655{
7ebb9315 2656 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2657 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2658 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2659 fattr->nlink = 2;
2660}
2661
72de53ec
BS		 2662static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2663 struct qstr *name, struct nfs_fh *fhandle,
2664 struct nfs_fattr *fattr)
1da177e4
LT		 2665{
2666 struct nfs4_exception exception = { };
72de53ec 2667 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2668 int err;
2669 do {
72de53ec
BS		 2670 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2671 switch (err) {
08ef7bd3 2672 case -NFS4ERR_BADNAME:
72de53ec
BS		 2673 err = -ENOENT;
2674 goto out;
0c2e53f1 2675 case -NFS4ERR_MOVED:
f05d147f 2676 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2677 goto out;
0c2e53f1 2678 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2679 err = -EPERM;
2680 if (client != *clnt)
2681 goto out;
2682
2683 client = nfs4_create_sec_client(client, dir, name);
2684 if (IS_ERR(client))
2685 return PTR_ERR(client);
2686
2687 exception.retry = 1;
2688 break;
2689 default:
2690 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2691 }
1da177e4 2692 } while (exception.retry);
72de53ec
BS		 2693
2694out:
2695 if (err == 0)
2696 *clnt = client;
2697 else if (client != *clnt)
2698 rpc_shutdown_client(client);
2699
1da177e4
LT		 2700 return err;
2701}
2702
80a16b21 2703static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2704 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2705{
2706 int status;
2707 struct rpc_clnt *client = NFS_CLIENT(dir);
2708
2709 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2710 if (client != NFS_CLIENT(dir)) {
2711 rpc_shutdown_client(client);
2712 nfs_fixup_secinfo_attributes(fattr);
2713 }
2714 return status;
2715}
2716
f05d147f
BS		 2717struct rpc_clnt *
2718nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2719 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2720{
2721 int status;
2722 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2723
2724 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2725 if (status < 0) {
2726 rpc_shutdown_client(client);
2727 return ERR_PTR(status);
2728 }
2729 return client;
2730}
2731
1da177e4
LT		 2732static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2733{
76b32999 2734 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2735 struct nfs4_accessargs args = {
2736 .fh = NFS_FH(inode),
a4980e78 2737 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2738 };
2739 struct nfs4_accessres res = {
2740 .server = server,
1da177e4 2741 };
1da177e4
LT		 2742 struct rpc_message msg = {
2743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2744 .rpc_argp = &args,
2745 .rpc_resp = &res,
2746 .rpc_cred = entry->cred,
2747 };
2748 int mode = entry->mask;
2749 int status;
2750
2751 /*
2752 * Determine which access bits we want to ask for...
2753 */
2754 if (mode & MAY_READ)
2755 args.access |= NFS4_ACCESS_READ;
2756 if (S_ISDIR(inode->i_mode)) {
2757 if (mode & MAY_WRITE)
2758 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2759 if (mode & MAY_EXEC)
2760 args.access |= NFS4_ACCESS_LOOKUP;
2761 } else {
2762 if (mode & MAY_WRITE)
2763 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2764 if (mode & MAY_EXEC)
2765 args.access |= NFS4_ACCESS_EXECUTE;
2766 }
c407d41a
TM		 2767
2768 res.fattr = nfs_alloc_fattr();
2769 if (res.fattr == NULL)
2770 return -ENOMEM;
2771
7c513058 2772 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2773 if (!status) {
6168f62c 2774 nfs_access_set_mask(entry, res.access);
c407d41a 2775 nfs_refresh_inode(inode, res.fattr);
1da177e4 2776 }
c407d41a 2777 nfs_free_fattr(res.fattr);
1da177e4
LT		 2778 return status;
2779}
2780
2781static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2782{
2783 struct nfs4_exception exception = { };
2784 int err;
2785 do {
2786 err = nfs4_handle_exception(NFS_SERVER(inode),
2787 _nfs4_proc_access(inode, entry),
2788 &exception);
2789 } while (exception.retry);
2790 return err;
2791}
2792
2793/*
2794 * TODO: For the time being, we don't try to get any attributes
2795 * along with any of the zero-copy operations READ, READDIR,
2796 * READLINK, WRITE.
2797 *
2798 * In the case of the first three, we want to put the GETATTR
2799 * after the read-type operation -- this is because it is hard
2800 * to predict the length of a GETATTR response in v4, and thus
2801 * align the READ data correctly. This means that the GETATTR
2802 * may end up partially falling into the page cache, and we should
2803 * shift it into the 'tail' of the xdr_buf before processing.
2804 * To do this efficiently, we need to know the total length
2805 * of data received, which doesn't seem to be available outside
2806 * of the RPC layer.
2807 *
2808 * In the case of WRITE, we also want to put the GETATTR after
2809 * the operation -- in this case because we want to make sure
140150db 2810 * we get the post-operation mtime and size.
1da177e4
LT		 2811 *
2812 * Both of these changes to the XDR layer would in fact be quite
2813 * minor, but I decided to leave them for a subsequent patch.
2814 */
2815static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2816 unsigned int pgbase, unsigned int pglen)
2817{
2818 struct nfs4_readlink args = {
2819 .fh = NFS_FH(inode),
2820 .pgbase = pgbase,
2821 .pglen = pglen,
2822 .pages = &page,
2823 };
f50c7000 2824 struct nfs4_readlink_res res;
1da177e4
LT		 2825 struct rpc_message msg = {
2826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2827 .rpc_argp = &args,
f50c7000 2828 .rpc_resp = &res,
1da177e4
LT		 2829 };
2830
7c513058 2831 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2832}
2833
2834static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2835 unsigned int pgbase, unsigned int pglen)
2836{
2837 struct nfs4_exception exception = { };
2838 int err;
2839 do {
2840 err = nfs4_handle_exception(NFS_SERVER(inode),
2841 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2842 &exception);
2843 } while (exception.retry);
2844 return err;
2845}
2846
1da177e4 2847/*
8867fe58 2848 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2849 */
1da177e4
LT		 2850static int
2851nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2852 int flags)
1da177e4 2853{
8867fe58 2854 struct nfs_open_context *ctx;
1da177e4 2855 struct nfs4_state *state;
1da177e4
LT		 2856 int status = 0;
2857
8867fe58
MS		 2858 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2859 if (IS_ERR(ctx))
2860 return PTR_ERR(ctx);
2861
a8a5da99 2862 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2863 state = nfs4_do_open(dir, dentry, ctx->mode,
2864 flags, sattr, ctx->cred,
2865 &ctx->mdsthreshold);
d4d9cdcb 2866 d_drop(dentry);
1da177e4
LT		 2867 if (IS_ERR(state)) {
2868 status = PTR_ERR(state);
c0204fd2 2869 goto out;
1da177e4 2870 }
d4d9cdcb 2871 d_add(dentry, igrab(state->inode));
d75340cc 2872 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2873 ctx->state = state;
1da177e4 2874out:
8867fe58 2875 put_nfs_open_context(ctx);
1da177e4
LT		 2876 return status;
2877}
2878
2879static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2880{
16e42959 2881 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2882 struct nfs_removeargs args = {
1da177e4 2883 .fh = NFS_FH(dir),
26fe5750 2884 .name = *name,
16e42959 2885 };
4fdc17b2 2886 struct nfs_removeres res = {
16e42959 2887 .server = server,
1da177e4 2888 };
1da177e4 2889 struct rpc_message msg = {
4fdc17b2
TM		 2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2891 .rpc_argp = &args,
2892 .rpc_resp = &res,
1da177e4 2893 };
778d2817 2894 int status;
1da177e4 2895
7c513058 2896 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2897 if (status == 0)
16e42959 2898 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2899 return status;
2900}
2901
2902static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2903{
2904 struct nfs4_exception exception = { };
2905 int err;
2906 do {
2907 err = nfs4_handle_exception(NFS_SERVER(dir),
2908 _nfs4_proc_remove(dir, name),
2909 &exception);
2910 } while (exception.retry);
2911 return err;
2912}
2913
e4eff1a6 2914static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2915{
e4eff1a6
TM		 2916 struct nfs_server *server = NFS_SERVER(dir);
2917 struct nfs_removeargs *args = msg->rpc_argp;
2918 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2919
e4eff1a6 2920 res->server = server;
1da177e4 2921 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2922 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2923}
2924
34e137cc
BS		 2925static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2926{
d9afbd1b
TM		 2927 nfs4_setup_sequence(NFS_SERVER(data->dir),
2928 &data->args.seq_args,
2929 &data->res.seq_res,
2930 task);
1da177e4
LT		 2931}
2932
e4eff1a6 2933static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2934{
e4eff1a6
TM		 2935 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2936
14516c3a
TM		 2937 if (!nfs4_sequence_done(task, &res->seq_res))
2938 return 0;
9e33bed5 2939 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2940 return 0;
2941 update_changeattr(dir, &res->cinfo);
e4eff1a6 2942 return 1;
1da177e4
LT		 2943}
2944
d3d4152a
JL		 2945static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2946{
2947 struct nfs_server *server = NFS_SERVER(dir);
2948 struct nfs_renameargs *arg = msg->rpc_argp;
2949 struct nfs_renameres *res = msg->rpc_resp;
2950
2951 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2952 res->server = server;
9d12b216 2953 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2954}
2955
c6bfa1a1
BS		 2956static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2957{
d9afbd1b
TM		 2958 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2959 &data->args.seq_args,
2960 &data->res.seq_res,
2961 task);
d3d4152a
JL		 2962}
2963
2964static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2965 struct inode *new_dir)
2966{
2967 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2968
2969 if (!nfs4_sequence_done(task, &res->seq_res))
2970 return 0;
2971 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2972 return 0;
2973
2974 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2975 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2976 return 1;
2977}
2978
1da177e4
LT		 2979static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2980 struct inode *new_dir, struct qstr *new_name)
2981{
6caf2c82 2982 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2983 struct nfs_renameargs arg = {
1da177e4
LT		 2984 .old_dir = NFS_FH(old_dir),
2985 .new_dir = NFS_FH(new_dir),
2986 .old_name = old_name,
2987 .new_name = new_name,
6caf2c82 2988 };
e8582a8b 2989 struct nfs_renameres res = {
6caf2c82 2990 .server = server,
1da177e4 2991 };
1da177e4
LT		 2992 struct rpc_message msg = {
2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2994 .rpc_argp = &arg,
2995 .rpc_resp = &res,
2996 };
011fff72 2997 int status = -ENOMEM;
1da177e4 2998
7c513058 2999 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3000 if (!status) {
3001 update_changeattr(old_dir, &res.old_cinfo);
3002 update_changeattr(new_dir, &res.new_cinfo);
3003 }
3004 return status;
3005}
3006
3007static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3008 struct inode *new_dir, struct qstr *new_name)
3009{
3010 struct nfs4_exception exception = { };
3011 int err;
3012 do {
3013 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3014 _nfs4_proc_rename(old_dir, old_name,
3015 new_dir, new_name),
3016 &exception);
3017 } while (exception.retry);
3018 return err;
3019}
3020
3021static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3022{
91ba2eee 3023 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3024 struct nfs4_link_arg arg = {
3025 .fh = NFS_FH(inode),
3026 .dir_fh = NFS_FH(dir),
3027 .name = name,
91ba2eee
TM		 3028 .bitmask = server->attr_bitmask,
3029 };
91ba2eee
TM		 3030 struct nfs4_link_res res = {
3031 .server = server,
1da177e4 3032 };
1da177e4
LT		 3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3035 .rpc_argp = &arg,
91ba2eee 3036 .rpc_resp = &res,
1da177e4 3037 };
136f2627
TM		 3038 int status = -ENOMEM;
3039
3040 res.fattr = nfs_alloc_fattr();
778d2817 3041 if (res.fattr == NULL)
136f2627 3042 goto out;
1da177e4 3043
7c513058 3044 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3045 if (!status) {
3046 update_changeattr(dir, &res.cinfo);
73a3d07c 3047 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3048 }
136f2627 3049out:
136f2627 3050 nfs_free_fattr(res.fattr);
1da177e4
LT		 3051 return status;
3052}
3053
3054static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3055{
3056 struct nfs4_exception exception = { };
3057 int err;
3058 do {
3059 err = nfs4_handle_exception(NFS_SERVER(inode),
3060 _nfs4_proc_link(inode, dir, name),
3061 &exception);
3062 } while (exception.retry);
3063 return err;
3064}
3065
57dc9a57
TM		 3066struct nfs4_createdata {
3067 struct rpc_message msg;
3068 struct nfs4_create_arg arg;
3069 struct nfs4_create_res res;
3070 struct nfs_fh fh;
3071 struct nfs_fattr fattr;
57dc9a57
TM		 3072};
3073
3074static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3075 struct qstr *name, struct iattr *sattr, u32 ftype)
3076{
3077 struct nfs4_createdata *data;
3078
3079 data = kzalloc(sizeof(*data), GFP_KERNEL);
3080 if (data != NULL) {
3081 struct nfs_server *server = NFS_SERVER(dir);
3082
3083 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3084 data->msg.rpc_argp = &data->arg;
3085 data->msg.rpc_resp = &data->res;
3086 data->arg.dir_fh = NFS_FH(dir);
3087 data->arg.server = server;
3088 data->arg.name = name;
3089 data->arg.attrs = sattr;
3090 data->arg.ftype = ftype;
3091 data->arg.bitmask = server->attr_bitmask;
3092 data->res.server = server;
3093 data->res.fh = &data->fh;
3094 data->res.fattr = &data->fattr;
57dc9a57 3095 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3096 }
3097 return data;
3098}
3099
3100static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3101{
7c513058 3102 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3103 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3104 if (status == 0) {
3105 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3106 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3107 }
3108 return status;
3109}
3110
3111static void nfs4_free_createdata(struct nfs4_createdata *data)
3112{
3113 kfree(data);
3114}
3115
4f390c15 3116static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3117 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3118{
57dc9a57
TM		 3119 struct nfs4_createdata *data;
3120 int status = -ENAMETOOLONG;
1da177e4 3121
94a6d753 3122 if (len > NFS4_MAXPATHLEN)
57dc9a57 3123 goto out;
4f390c15 3124
57dc9a57
TM		 3125 status = -ENOMEM;
3126 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3127 if (data == NULL)
3128 goto out;
3129
3130 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3131 data->arg.u.symlink.pages = &page;
3132 data->arg.u.symlink.len = len;
1da177e4 3133
57dc9a57
TM		 3134 status = nfs4_do_create(dir, dentry, data);
3135
3136 nfs4_free_createdata(data);
3137out:
1da177e4
LT		 3138 return status;
3139}
3140
4f390c15 3141static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3142 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3143{
3144 struct nfs4_exception exception = { };
3145 int err;
3146 do {
3147 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3148 _nfs4_proc_symlink(dir, dentry, page,
3149 len, sattr),
1da177e4
LT		 3150 &exception);
3151 } while (exception.retry);
3152 return err;
3153}
3154
3155static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3156 struct iattr *sattr)
3157{
57dc9a57
TM		 3158 struct nfs4_createdata *data;
3159 int status = -ENOMEM;
1da177e4 3160
57dc9a57
TM		 3161 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3162 if (data == NULL)
3163 goto out;
3164
3165 status = nfs4_do_create(dir, dentry, data);
3166
3167 nfs4_free_createdata(data);
3168out:
1da177e4
LT		 3169 return status;
3170}
3171
3172static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3173 struct iattr *sattr)
3174{
3175 struct nfs4_exception exception = { };
3176 int err;
a8a5da99
AK		 3177
3178 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3179 do {
3180 err = nfs4_handle_exception(NFS_SERVER(dir),
3181 _nfs4_proc_mkdir(dir, dentry, sattr),
3182 &exception);
3183 } while (exception.retry);
3184 return err;
3185}
3186
3187static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3188 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3189{
3190 struct inode *dir = dentry->d_inode;
3191 struct nfs4_readdir_arg args = {
3192 .fh = NFS_FH(dir),
56e4ebf8 3193 .pages = pages,
1da177e4
LT		 3194 .pgbase = 0,
3195 .count = count,
96d25e53 3196 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3197 .plus = plus,
1da177e4
LT		 3198 };
3199 struct nfs4_readdir_res res;
3200 struct rpc_message msg = {
3201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3202 .rpc_argp = &args,
3203 .rpc_resp = &res,
3204 .rpc_cred = cred,
3205 };
3206 int status;
3207
3110ff80 3208 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3209 dentry->d_parent->d_name.name,
3210 dentry->d_name.name,
3211 (unsigned long long)cookie);
c3f52af3 3212 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3213 res.pgbase = args.pgbase;
7c513058 3214 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3215 if (status >= 0) {
c3f52af3 3216 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3217 status += args.pgbase;
3218 }
c4812998
TM		 3219
3220 nfs_invalidate_atime(dir);
3221
3110ff80 3222 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3223 return status;
3224}
3225
3226static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3227 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3228{
3229 struct nfs4_exception exception = { };
3230 int err;
3231 do {
3232 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3233 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3234 pages, count, plus),
1da177e4
LT		 3235 &exception);
3236 } while (exception.retry);
3237 return err;
3238}
3239
3240static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3241 struct iattr *sattr, dev_t rdev)
3242{
57dc9a57
TM		 3243 struct nfs4_createdata *data;
3244 int mode = sattr->ia_mode;
3245 int status = -ENOMEM;
1da177e4 3246
57dc9a57
TM		 3247 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3248 if (data == NULL)
3249 goto out;
3250
1da177e4 3251 if (S_ISFIFO(mode))
57dc9a57 3252 data->arg.ftype = NF4FIFO;
1da177e4 3253 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3254 data->arg.ftype = NF4BLK;
3255 data->arg.u.device.specdata1 = MAJOR(rdev);
3256 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3257 }
3258 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3259 data->arg.ftype = NF4CHR;
3260 data->arg.u.device.specdata1 = MAJOR(rdev);
3261 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3262 } else if (!S_ISSOCK(mode)) {
3263 status = -EINVAL;
3264 goto out_free;
1da177e4 3265 }
1da177e4 3266
57dc9a57 3267 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3268out_free:
57dc9a57
TM		 3269 nfs4_free_createdata(data);
3270out:
1da177e4
LT		 3271 return status;
3272}
3273
3274static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3275 struct iattr *sattr, dev_t rdev)
3276{
3277 struct nfs4_exception exception = { };
3278 int err;
a8a5da99
AK		 3279
3280 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3281 do {
3282 err = nfs4_handle_exception(NFS_SERVER(dir),
3283 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3284 &exception);
3285 } while (exception.retry);
3286 return err;
3287}
3288
3289static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3290 struct nfs_fsstat *fsstat)
3291{
3292 struct nfs4_statfs_arg args = {
3293 .fh = fhandle,
3294 .bitmask = server->attr_bitmask,
3295 };
24ad148a
BH		 3296 struct nfs4_statfs_res res = {
3297 .fsstat = fsstat,
3298 };
1da177e4
LT		 3299 struct rpc_message msg = {
3300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3301 .rpc_argp = &args,
24ad148a 3302 .rpc_resp = &res,
1da177e4
LT		 3303 };
3304
0e574af1 3305 nfs_fattr_init(fsstat->fattr);
7c513058 3306 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3307}
3308
3309static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3310{
3311 struct nfs4_exception exception = { };
3312 int err;
3313 do {
3314 err = nfs4_handle_exception(server,
3315 _nfs4_proc_statfs(server, fhandle, fsstat),
3316 &exception);
3317 } while (exception.retry);
3318 return err;
3319}
3320
3321static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3322 struct nfs_fsinfo *fsinfo)
3323{
3324 struct nfs4_fsinfo_arg args = {
3325 .fh = fhandle,
3326 .bitmask = server->attr_bitmask,
3327 };
3dda5e43
BH		 3328 struct nfs4_fsinfo_res res = {
3329 .fsinfo = fsinfo,
3330 };
1da177e4
LT		 3331 struct rpc_message msg = {
3332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3333 .rpc_argp = &args,
3dda5e43 3334 .rpc_resp = &res,
1da177e4
LT		 3335 };
3336
7c513058 3337 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3338}
3339
3340static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3341{
3342 struct nfs4_exception exception = { };
3343 int err;
3344
3345 do {
3346 err = nfs4_handle_exception(server,
3347 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3348 &exception);
3349 } while (exception.retry);
3350 return err;
3351}
3352
3353static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3354{
e38eb650
BS		 3355 int error;
3356
0e574af1 3357 nfs_fattr_init(fsinfo->fattr);
e38eb650 3358 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3359 if (error == 0) {
3360 /* block layout checks this! */
3361 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3362 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3363 }
e38eb650
BS		 3364
3365 return error;
1da177e4
LT		 3366}
3367
3368static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3369 struct nfs_pathconf *pathconf)
3370{
3371 struct nfs4_pathconf_arg args = {
3372 .fh = fhandle,
3373 .bitmask = server->attr_bitmask,
3374 };
d45b2989
BH		 3375 struct nfs4_pathconf_res res = {
3376 .pathconf = pathconf,
3377 };
1da177e4
LT		 3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3380 .rpc_argp = &args,
d45b2989 3381 .rpc_resp = &res,
1da177e4
LT		 3382 };
3383
3384 /* None of the pathconf attributes are mandatory to implement */
3385 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3386 memset(pathconf, 0, sizeof(*pathconf));
3387 return 0;
3388 }
3389
0e574af1 3390 nfs_fattr_init(pathconf->fattr);
7c513058 3391 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3392}
3393
3394static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3395 struct nfs_pathconf *pathconf)
3396{
3397 struct nfs4_exception exception = { };
3398 int err;
3399
3400 do {
3401 err = nfs4_handle_exception(server,
3402 _nfs4_proc_pathconf(server, fhandle, pathconf),
3403 &exception);
3404 } while (exception.retry);
3405 return err;
3406}
3407
d20581aa
BH		 3408void __nfs4_read_done_cb(struct nfs_read_data *data)
3409{
cd841605 3410 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3411}
3412
cbdabc7f 3413static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3414{
cd841605 3415 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3416
9e33bed5 3417 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3418 rpc_restart_call_prepare(task);
ec06c096 3419 return -EAGAIN;
1da177e4 3420 }
8850df99 3421
d20581aa 3422 __nfs4_read_done_cb(data);
1da177e4 3423 if (task->tk_status > 0)
ec06c096
TM		 3424 renew_lease(server, data->timestamp);
3425 return 0;
1da177e4
LT		 3426}
3427
cbdabc7f
AA		 3428static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3429{
3430
3431 dprintk("--> %s\n", __func__);
3432
3433 if (!nfs4_sequence_done(task, &data->res.seq_res))
3434 return -EAGAIN;
3435
d20581aa
BH		 3436 return data->read_done_cb ? data->read_done_cb(task, data) :
3437 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3438}
3439
bdc7f021 3440static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3441{
1da177e4 3442 data->timestamp = jiffies;
cbdabc7f 3443 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3444 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3445 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3446}
3447
ea7c3303
BS		 3448static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3449{
d9afbd1b
TM		 3450 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3451 &data->args.seq_args,
3452 &data->res.seq_res,
3453 task);
1da177e4
LT		 3454}
3455
b029bc9b 3456static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3457{
cd841605 3458 struct inode *inode = data->header->inode;
1da177e4 3459
9e33bed5 3460 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3461 rpc_restart_call_prepare(task);
788e7a89 3462 return -EAGAIN;
1da177e4 3463 }
4f9838c7 3464 if (task->tk_status >= 0) {
1da177e4 3465 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3466 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3467 }
788e7a89 3468 return 0;
1da177e4
LT		 3469}
3470
b029bc9b
FI		 3471static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3472{
3473 if (!nfs4_sequence_done(task, &data->res.seq_res))
3474 return -EAGAIN;
d20581aa
BH		 3475 return data->write_done_cb ? data->write_done_cb(task, data) :
3476 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3477}
3478
5a37f851
TM		 3479static
3480bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3481{
5a37f851
TM		 3482 const struct nfs_pgio_header *hdr = data->header;
3483
3484 /* Don't request attributes for pNFS or O_DIRECT writes */
3485 if (data->ds_clp != NULL || hdr->dreq != NULL)
3486 return false;
3487 /* Otherwise, request attributes if and only if we don't hold
3488 * a delegation
3489 */
011e2a7f 3490 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3491}
a69aef14 3492
bdc7f021 3493static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3494{
cd841605 3495 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3496
5a37f851 3497 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3498 data->args.bitmask = NULL;
3499 data->res.fattr = NULL;
3500 } else
3501 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3502
b029bc9b
FI		 3503 if (!data->write_done_cb)
3504 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3505 data->res.server = server;
1da177e4
LT		 3506 data->timestamp = jiffies;
3507
bdc7f021 3508 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3509 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3510}
3511
c6cb80d0
BS		 3512static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3513{
d9afbd1b
TM		 3514 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3515 &data->args.seq_args,
3516 &data->res.seq_res,
3517 task);
1da177e4
LT		 3518}
3519
0b7c0153 3520static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3521{
d9afbd1b
TM		 3522 nfs4_setup_sequence(NFS_SERVER(data->inode),
3523 &data->args.seq_args,
3524 &data->res.seq_res,
3525 task);
1da177e4
LT		 3526}
3527
0b7c0153 3528static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3529{
1da177e4 3530 struct inode *inode = data->inode;
14516c3a 3531
9e33bed5 3532 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3533 rpc_restart_call_prepare(task);
788e7a89 3534 return -EAGAIN;
1da177e4 3535 }
788e7a89 3536 return 0;
1da177e4
LT		 3537}
3538
0b7c0153 3539static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3540{
3541 if (!nfs4_sequence_done(task, &data->res.seq_res))
3542 return -EAGAIN;
0b7c0153 3543 return data->commit_done_cb(task, data);
5f452431
FI		 3544}
3545
0b7c0153 3546static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3547{
788e7a89 3548 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3549
0b7c0153
FI		 3550 if (data->commit_done_cb == NULL)
3551 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3552 data->res.server = server;
bdc7f021 3553 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3554 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3555}
3556
9bc4e3ca
CL		 3557struct nfs4_renewdata {
3558 struct nfs_client *client;
3559 unsigned long timestamp;
3560};
3561
1da177e4
LT		 3562/*
3563 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3564 * standalone procedure for queueing an asynchronous RENEW.
3565 */
9bc4e3ca 3566static void nfs4_renew_release(void *calldata)
dc96aef9 3567{
9bc4e3ca
CL		 3568 struct nfs4_renewdata *data = calldata;
3569 struct nfs_client *clp = data->client;
dc96aef9 3570
0851de06
AB		 3571 if (atomic_read(&clp->cl_count) > 1)
3572 nfs4_schedule_state_renewal(clp);
3573 nfs_put_client(clp);
9bc4e3ca 3574 kfree(data);
dc96aef9
AB		 3575}
3576
9bc4e3ca 3577static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3578{
9bc4e3ca
CL		 3579 struct nfs4_renewdata *data = calldata;
3580 struct nfs_client *clp = data->client;
3581 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3582
3583 if (task->tk_status < 0) {
95baa25c 3584 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3585 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3586 return;
3587 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3588 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3589 return;
3590 }
3591 nfs4_schedule_path_down_recovery(clp);
1da177e4 3592 }
452e9352 3593 do_renew_lease(clp, timestamp);
1da177e4
LT		 3594}
3595
963d8fe5
TM		 3596static const struct rpc_call_ops nfs4_renew_ops = {
3597 .rpc_call_done = nfs4_renew_done,
dc96aef9 3598 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3599};
3600
2f60ea6b 3601static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3602{
3603 struct rpc_message msg = {
3604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3605 .rpc_argp = clp,
b4454fe1 3606 .rpc_cred = cred,
1da177e4 3607 };
9bc4e3ca 3608 struct nfs4_renewdata *data;
1da177e4 3609
2f60ea6b
TM		 3610 if (renew_flags == 0)
3611 return 0;
0851de06
AB		 3612 if (!atomic_inc_not_zero(&clp->cl_count))
3613 return -EIO;
b569ad34 3614 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3615 if (data == NULL)
3616 return -ENOMEM;
3617 data->client = clp;
3618 data->timestamp = jiffies;
1da177e4 3619 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3620 &nfs4_renew_ops, data);
1da177e4
LT		 3621}
3622
8534d4ec 3623static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3624{
3625 struct rpc_message msg = {
3626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3627 .rpc_argp = clp,
b4454fe1 3628 .rpc_cred = cred,
1da177e4
LT		 3629 };
3630 unsigned long now = jiffies;
3631 int status;
3632
3633 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3634 if (status < 0)
3635 return status;
452e9352 3636 do_renew_lease(clp, now);
1da177e4
LT		 3637 return 0;
3638}
3639
aa1870af
BF		 3640static inline int nfs4_server_supports_acls(struct nfs_server *server)
3641{
3642 return (server->caps & NFS_CAP_ACLS)
3643 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3644 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3645}
3646
21f498c2
TM		 3647/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3648 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3649 * the stack.
3650 */
21f498c2 3651#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3652
e9e3d724
NH		 3653static int buf_to_pages_noslab(const void *buf, size_t buflen,
3654 struct page **pages, unsigned int *pgbase)
3655{
3656 struct page *newpage, **spages;
3657 int rc = 0;
3658 size_t len;
3659 spages = pages;
3660
3661 do {
21f498c2 3662 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3663 newpage = alloc_page(GFP_KERNEL);
3664
3665 if (newpage == NULL)
3666 goto unwind;
3667 memcpy(page_address(newpage), buf, len);
3668 buf += len;
3669 buflen -= len;
3670 *pages++ = newpage;
3671 rc++;
3672 } while (buflen != 0);
3673
3674 return rc;
3675
3676unwind:
3677 for(; rc > 0; rc--)
3678 __free_page(spages[rc-1]);
3679 return -ENOMEM;
3680}
3681
e50a1c2e
BF		 3682struct nfs4_cached_acl {
3683 int cached;
3684 size_t len;
3e9d4154 3685 char data[0];
e50a1c2e
BF		 3686};
3687
3688static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3689{
3690 struct nfs_inode *nfsi = NFS_I(inode);
3691
3692 spin_lock(&inode->i_lock);
3693 kfree(nfsi->nfs4_acl);
3694 nfsi->nfs4_acl = acl;
3695 spin_unlock(&inode->i_lock);
3696}
3697
3698static void nfs4_zap_acl_attr(struct inode *inode)
3699{
3700 nfs4_set_cached_acl(inode, NULL);
3701}
3702
3703static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3704{
3705 struct nfs_inode *nfsi = NFS_I(inode);
3706 struct nfs4_cached_acl *acl;
3707 int ret = -ENOENT;
3708
3709 spin_lock(&inode->i_lock);
3710 acl = nfsi->nfs4_acl;
3711 if (acl == NULL)
3712 goto out;
3713 if (buf == NULL) /* user is just asking for length */
3714 goto out_len;
3715 if (acl->cached == 0)
3716 goto out;
3717 ret = -ERANGE; /* see getxattr(2) man page */
3718 if (acl->len > buflen)
3719 goto out;
3720 memcpy(buf, acl->data, acl->len);
3721out_len:
3722 ret = acl->len;
3723out:
3724 spin_unlock(&inode->i_lock);
3725 return ret;
3726}
3727
5794d21e 3728static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3729{
3730 struct nfs4_cached_acl *acl;
b291f1b1 3731 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3732
1f1ea6c2 3733 if (buflen <= PAGE_SIZE) {
b291f1b1 3734 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3735 if (acl == NULL)
3736 goto out;
3737 acl->cached = 1;
5794d21e 3738 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3739 } else {
3740 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3741 if (acl == NULL)
3742 goto out;
3743 acl->cached = 0;
3744 }
3745 acl->len = acl_len;
3746out:
3747 nfs4_set_cached_acl(inode, acl);
3748}
3749
bf118a34
AA		 3750/*
3751 * The getxattr API returns the required buffer length when called with a
3752 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3753 * the required buf. On a NULL buf, we send a page of data to the server
3754 * guessing that the ACL request can be serviced by a page. If so, we cache
3755 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3756 * the cache. If not so, we throw away the page, and cache the required
3757 * length. The next getxattr call will then produce another round trip to
3758 * the server, this time with the input buf of the required size.
3759 */
16b4289c 3760static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3761{
bf118a34 3762 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3763 struct nfs_getaclargs args = {
3764 .fh = NFS_FH(inode),
3765 .acl_pages = pages,
3766 .acl_len = buflen,
3767 };
663c79b3
BH		 3768 struct nfs_getaclres res = {
3769 .acl_len = buflen,
3770 };
aa1870af
BF		 3771 struct rpc_message msg = {
3772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3773 .rpc_argp = &args,
663c79b3 3774 .rpc_resp = &res,
aa1870af 3775 };
21f498c2
TM		 3776 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3777 int ret = -ENOMEM, i;
aa1870af 3778
bf118a34
AA		 3779 /* As long as we're doing a round trip to the server anyway,
3780 * let's be prepared for a page of acl data. */
3781 if (npages == 0)
3782 npages = 1;
21f498c2
TM		 3783 if (npages > ARRAY_SIZE(pages))
3784 return -ERANGE;
5a006899 3785
bf118a34
AA		 3786 for (i = 0; i < npages; i++) {
3787 pages[i] = alloc_page(GFP_KERNEL);
3788 if (!pages[i])
3789 goto out_free;
e50a1c2e 3790 }
5a006899
SP		 3791
3792 /* for decoding across pages */
3793 res.acl_scratch = alloc_page(GFP_KERNEL);
3794 if (!res.acl_scratch)
3795 goto out_free;
3796
bf118a34
AA		 3797 args.acl_len = npages * PAGE_SIZE;
3798 args.acl_pgbase = 0;
5a006899 3799
de040bec 3800 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3801 __func__, buf, buflen, npages, args.acl_len);
3802 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3803 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3804 if (ret)
3805 goto out_free;
bf118a34 3806
1f1ea6c2
TM		 3807 /* Handle the case where the passed-in buffer is too short */
3808 if (res.acl_flags & NFS4_ACL_TRUNC) {
3809 /* Did the user only issue a request for the acl length? */
3810 if (buf == NULL)
3811 goto out_ok;
e50a1c2e 3812 ret = -ERANGE;
1f1ea6c2 3813 goto out_free;
e50a1c2e 3814 }
1f1ea6c2 3815 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3816 if (buf) {
3817 if (res.acl_len > buflen) {
3818 ret = -ERANGE;
3819 goto out_free;
3820 }
1f1ea6c2 3821 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3822 }
1f1ea6c2
TM		 3823out_ok:
3824 ret = res.acl_len;
e50a1c2e 3825out_free:
bf118a34
AA		 3826 for (i = 0; i < npages; i++)
3827 if (pages[i])
3828 __free_page(pages[i]);
331818f1
TM		 3829 if (res.acl_scratch)
3830 __free_page(res.acl_scratch);
aa1870af
BF		 3831 return ret;
3832}
3833
16b4289c
TM		 3834static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3835{
3836 struct nfs4_exception exception = { };
3837 ssize_t ret;
3838 do {
3839 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3840 if (ret >= 0)
3841 break;
3842 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3843 } while (exception.retry);
3844 return ret;
3845}
3846
e50a1c2e
BF		 3847static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3848{
3849 struct nfs_server *server = NFS_SERVER(inode);
3850 int ret;
3851
3852 if (!nfs4_server_supports_acls(server))
3853 return -EOPNOTSUPP;
3854 ret = nfs_revalidate_inode(server, inode);
3855 if (ret < 0)
3856 return ret;
08a22b39
AK		 3857 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3858 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3859 ret = nfs4_read_cached_acl(inode, buf, buflen);
3860 if (ret != -ENOENT)
bf118a34
AA		 3861 /* -ENOENT is returned if there is no ACL or if there is an ACL
3862 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3863 return ret;
3864 return nfs4_get_acl_uncached(inode, buf, buflen);
3865}
3866
16b4289c 3867static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3868{
3869 struct nfs_server *server = NFS_SERVER(inode);
3870 struct page *pages[NFS4ACL_MAXPAGES];
3871 struct nfs_setaclargs arg = {
3872 .fh = NFS_FH(inode),
3873 .acl_pages = pages,
3874 .acl_len = buflen,
3875 };
73c403a9 3876 struct nfs_setaclres res;
4b580ee3
BF		 3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3879 .rpc_argp = &arg,
73c403a9 3880 .rpc_resp = &res,
4b580ee3 3881 };
21f498c2 3882 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3883 int ret, i;
4b580ee3
BF		 3884
3885 if (!nfs4_server_supports_acls(server))
3886 return -EOPNOTSUPP;
21f498c2
TM		 3887 if (npages > ARRAY_SIZE(pages))
3888 return -ERANGE;
e9e3d724
NH		 3889 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3890 if (i < 0)
3891 return i;
57ec14c5 3892 nfs4_inode_return_delegation(inode);
7c513058 3893 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3894
3895 /*
3896 * Free each page after tx, so the only ref left is
3897 * held by the network stack
3898 */
3899 for (; i > 0; i--)
3900 put_page(pages[i-1]);
3901
08a22b39
AK		 3902 /*
3903 * Acl update can result in inode attribute update.
3904 * so mark the attribute cache invalid.
3905 */
3906 spin_lock(&inode->i_lock);
3907 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3908 spin_unlock(&inode->i_lock);
f41f7418
TM		 3909 nfs_access_zap_cache(inode);
3910 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3911 return ret;
3912}
3913
16b4289c
TM		 3914static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3915{
3916 struct nfs4_exception exception = { };
3917 int err;
3918 do {
3919 err = nfs4_handle_exception(NFS_SERVER(inode),
3920 __nfs4_proc_set_acl(inode, buf, buflen),
3921 &exception);
3922 } while (exception.retry);
3923 return err;
3924}
3925
1da177e4 3926static int
aa5190d0 3927nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3928{
aa5190d0
TM		 3929 struct nfs_client *clp = server->nfs_client;
3930
3931 if (task->tk_status >= 0)
1da177e4
LT		 3932 return 0;
3933 switch(task->tk_status) {
a1d0b5ee 3934 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3935 case -NFS4ERR_ADMIN_REVOKED:
3936 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3937 if (state == NULL)
3938 break;
3939 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3940 case -NFS4ERR_OPENMODE:
3941 if (state == NULL)
3942 break;
0400a6b0
TM		 3943 nfs4_schedule_stateid_recovery(server, state);
3944 goto wait_on_recovery;
0ced63d1
TM		 3945 case -NFS4ERR_EXPIRED:
3946 if (state != NULL)
3947 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3948 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3949 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3950 nfs4_schedule_lease_recovery(clp);
3951 goto wait_on_recovery;
4745e315
AA		 3952#if defined(CONFIG_NFS_V4_1)
3953 case -NFS4ERR_BADSESSION:
3954 case -NFS4ERR_BADSLOT:
3955 case -NFS4ERR_BAD_HIGH_SLOT:
3956 case -NFS4ERR_DEADSESSION:
3957 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3958 case -NFS4ERR_SEQ_FALSE_RETRY:
3959 case -NFS4ERR_SEQ_MISORDERED:
3960 dprintk("%s ERROR %d, Reset session\n", __func__,
3961 task->tk_status);
9f594791 3962 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3963 task->tk_status = 0;
3964 return -EAGAIN;
3965#endif /* CONFIG_NFS_V4_1 */
1da177e4 3966 case -NFS4ERR_DELAY:
aa5190d0 3967 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3968 case -NFS4ERR_GRACE:
1da177e4
LT		 3969 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3970 task->tk_status = 0;
3971 return -EAGAIN;
a8a4ae3a 3972 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3973 case -NFS4ERR_OLD_STATEID:
3974 task->tk_status = 0;
3975 return -EAGAIN;
3976 }
3977 task->tk_status = nfs4_map_errors(task->tk_status);
3978 return 0;
0400a6b0 3979wait_on_recovery:
a2c0b9e2 3980 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3981 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3982 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3983 task->tk_status = 0;
3984 return -EAGAIN;
1da177e4
LT		 3985}
3986
f092075d
CL		 3987static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3988 nfs4_verifier *bootverf)
cd93710e
CL		 3989{
3990 __be32 verf[2];
3991
2c820d9a
CL		 3992 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3993 /* An impossible timestamp guarantees this value
3994 * will never match a generated boot time. */
3995 verf[0] = 0;
3996 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3997 } else {
f092075d
CL		 3998 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3999 verf[0] = (__be32)nn->boot_time.tv_sec;
4000 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4001 }
cd93710e
CL		 4002 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4003}
4004
e984a55a
CL		 4005static unsigned int
4006nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4007 char *buf, size_t len)
4008{
4009 unsigned int result;
4010
4011 rcu_read_lock();
4012 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4013 clp->cl_ipaddr,
4014 rpc_peeraddr2str(clp->cl_rpcclient,
4015 RPC_DISPLAY_ADDR),
4016 rpc_peeraddr2str(clp->cl_rpcclient,
4017 RPC_DISPLAY_PROTO));
4018 rcu_read_unlock();
4019 return result;
4020}
4021
4022static unsigned int
4023nfs4_init_uniform_client_string(const struct nfs_client *clp,
4024 char *buf, size_t len)
4025{
6f2ea7f2
CL		 4026 char *nodename = clp->cl_rpcclient->cl_nodename;
4027
4028 if (nfs4_client_id_uniquifier[0] != '\0')
4029 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4030 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4031 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4032 nodename);
e984a55a
CL		 4033}
4034
6bbb4ae8
CL		 4035/**
4036 * nfs4_proc_setclientid - Negotiate client ID
4037 * @clp: state data structure
4038 * @program: RPC program for NFSv4 callback service
4039 * @port: IP port number for NFS4 callback service
4040 * @cred: RPC credential to use for this call
4041 * @res: where to place the result
4042 *
4043 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4044 */
bb8b27e5
TM		 4045int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4046 unsigned short port, struct rpc_cred *cred,
4047 struct nfs4_setclientid_res *res)
1da177e4
LT		 4048{
4049 nfs4_verifier sc_verifier;
4050 struct nfs4_setclientid setclientid = {
4051 .sc_verifier = &sc_verifier,
4052 .sc_prog = program,
f4eecd5d 4053 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4054 };
4055 struct rpc_message msg = {
4056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4057 .rpc_argp = &setclientid,
bb8b27e5 4058 .rpc_resp = res,
286d7d6a 4059 .rpc_cred = cred,
1da177e4 4060 };
6bbb4ae8 4061 int status;
1da177e4 4062
de734831 4063 /* nfs_client_id4 */
f092075d 4064 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4065 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4066 setclientid.sc_name_len =
4067 nfs4_init_uniform_client_string(clp,
4068 setclientid.sc_name,
4069 sizeof(setclientid.sc_name));
4070 else
4071 setclientid.sc_name_len =
4072 nfs4_init_nonuniform_client_string(clp,
4073 setclientid.sc_name,
4074 sizeof(setclientid.sc_name));
de734831 4075 /* cb_client4 */
e984a55a 4076 rcu_read_lock();
de734831 4077 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4078 sizeof(setclientid.sc_netid),
4079 rpc_peeraddr2str(clp->cl_rpcclient,
4080 RPC_DISPLAY_NETID));
de734831
CL		 4081 rcu_read_unlock();
4082 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4083 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4084 clp->cl_ipaddr, port >> 8, port & 255);
4085
6bbb4ae8
CL		 4086 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4087 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4088 setclientid.sc_name_len, setclientid.sc_name);
4089 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4090 dprintk("NFS reply setclientid: %d\n", status);
4091 return status;
1da177e4
LT		 4092}
4093
6bbb4ae8
CL		 4094/**
4095 * nfs4_proc_setclientid_confirm - Confirm client ID
4096 * @clp: state data structure
4097 * @res: result of a previous SETCLIENTID
4098 * @cred: RPC credential to use for this call
4099 *
4100 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4101 */
fd954ae1 4102int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4103 struct nfs4_setclientid_res *arg,
4104 struct rpc_cred *cred)
1da177e4
LT		 4105{
4106 struct nfs_fsinfo fsinfo;
4107 struct rpc_message msg = {
4108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4109 .rpc_argp = arg,
1da177e4 4110 .rpc_resp = &fsinfo,
286d7d6a 4111 .rpc_cred = cred,
1da177e4
LT		 4112 };
4113 unsigned long now;
4114 int status;
4115
6bbb4ae8
CL		 4116 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4117 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4118 clp->cl_clientid);
1da177e4 4119 now = jiffies;
1bd714f2 4120 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4121 if (status == 0) {
4122 spin_lock(&clp->cl_lock);
4123 clp->cl_lease_time = fsinfo.lease_time * HZ;
4124 clp->cl_last_renewal = now;
4125 spin_unlock(&clp->cl_lock);
4126 }
6bbb4ae8 4127 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4128 return status;
4129}
4130
fe650407
TM		 4131struct nfs4_delegreturndata {
4132 struct nfs4_delegreturnargs args;
fa178f29 4133 struct nfs4_delegreturnres res;
fe650407
TM		 4134 struct nfs_fh fh;
4135 nfs4_stateid stateid;
26e976a8 4136 unsigned long timestamp;
fa178f29 4137 struct nfs_fattr fattr;
fe650407
TM		 4138 int rpc_status;
4139};
4140
fe650407
TM		 4141static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4142{
4143 struct nfs4_delegreturndata *data = calldata;
938e1010 4144
14516c3a
TM		 4145 if (!nfs4_sequence_done(task, &data->res.seq_res))
4146 return;
938e1010 4147
79708861
RL		 4148 switch (task->tk_status) {
4149 case -NFS4ERR_STALE_STATEID:
4150 case -NFS4ERR_EXPIRED:
4151 case 0:
fa178f29 4152 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4153 break;
4154 default:
4155 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4156 -EAGAIN) {
d00c5d43 4157 rpc_restart_call_prepare(task);
79708861
RL		 4158 return;
4159 }
4160 }
4161 data->rpc_status = task->tk_status;
fe650407
TM		 4162}
4163
4164static void nfs4_delegreturn_release(void *calldata)
4165{
fe650407
TM		 4166 kfree(calldata);
4167}
4168
938e1010
AA		 4169#if defined(CONFIG_NFS_V4_1)
4170static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4171{
4172 struct nfs4_delegreturndata *d_data;
4173
4174 d_data = (struct nfs4_delegreturndata *)data;
4175
d9afbd1b
TM		 4176 nfs4_setup_sequence(d_data->res.server,
4177 &d_data->args.seq_args,
4178 &d_data->res.seq_res,
4179 task);
938e1010
AA		 4180}
4181#endif /* CONFIG_NFS_V4_1 */
4182
c8d149f3 4183static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4184#if defined(CONFIG_NFS_V4_1)
4185 .rpc_call_prepare = nfs4_delegreturn_prepare,
4186#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4187 .rpc_call_done = nfs4_delegreturn_done,
4188 .rpc_release = nfs4_delegreturn_release,
4189};
4190
e6f81075 4191static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4192{
4193 struct nfs4_delegreturndata *data;
fa178f29 4194 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4195 struct rpc_task *task;
5138fde0
TM		 4196 struct rpc_message msg = {
4197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4198 .rpc_cred = cred,
4199 };
c970aa85
TM		 4200 struct rpc_task_setup task_setup_data = {
4201 .rpc_client = server->client,
5138fde0 4202 .rpc_message = &msg,
c970aa85
TM		 4203 .callback_ops = &nfs4_delegreturn_ops,
4204 .flags = RPC_TASK_ASYNC,
4205 };
e6f81075 4206 int status = 0;
fe650407 4207
8535b2be 4208 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4209 if (data == NULL)
4210 return -ENOMEM;
9d12b216 4211 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4212 data->args.fhandle = &data->fh;
4213 data->args.stateid = &data->stateid;
9e907fec 4214 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4215 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4216 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4217 data->res.fattr = &data->fattr;
4218 data->res.server = server;
5138fde0 4219 nfs_fattr_init(data->res.fattr);
26e976a8 4220 data->timestamp = jiffies;
fe650407
TM		 4221 data->rpc_status = 0;
4222
c970aa85 4223 task_setup_data.callback_data = data;
1174dd1f
TM		 4224 msg.rpc_argp = &data->args;
4225 msg.rpc_resp = &data->res;
c970aa85 4226 task = rpc_run_task(&task_setup_data);
7a1218a2 4227 if (IS_ERR(task))
fe650407 4228 return PTR_ERR(task);
e6f81075
TM		 4229 if (!issync)
4230 goto out;
fe650407 4231 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4232 if (status != 0)
4233 goto out;
4234 status = data->rpc_status;
e144cbcc
TM		 4235 if (status == 0)
4236 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4237 else
4238 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4239out:
e6b3c4db 4240 rpc_put_task(task);
fe650407 4241 return status;
1da177e4
LT		 4242}
4243
e6f81075 4244int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4245{
4246 struct nfs_server *server = NFS_SERVER(inode);
4247 struct nfs4_exception exception = { };
4248 int err;
4249 do {
e6f81075 4250 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4251 switch (err) {
4252 case -NFS4ERR_STALE_STATEID:
4253 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4254 case 0:
4255 return 0;
4256 }
4257 err = nfs4_handle_exception(server, err, &exception);
4258 } while (exception.retry);
4259 return err;
4260}
4261
4262#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4263#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4264
4265/*
4266 * sleep, with exponential backoff, and retry the LOCK operation.
4267 */
4268static unsigned long
4269nfs4_set_lock_task_retry(unsigned long timeout)
4270{
d310310c 4271 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4272 timeout <<= 1;
4273 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4274 return NFS4_LOCK_MAXTIMEOUT;
4275 return timeout;
4276}
4277
1da177e4
LT		 4278static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4279{
4280 struct inode *inode = state->inode;
4281 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4282 struct nfs_client *clp = server->nfs_client;
911d1aaf 4283 struct nfs_lockt_args arg = {
1da177e4 4284 .fh = NFS_FH(inode),
911d1aaf 4285 .fl = request,
1da177e4 4286 };
911d1aaf
TM		 4287 struct nfs_lockt_res res = {
4288 .denied = request,
1da177e4
LT		 4289 };
4290 struct rpc_message msg = {
4291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4292 .rpc_argp = &arg,
4293 .rpc_resp = &res,
4294 .rpc_cred = state->owner->so_cred,
4295 };
1da177e4
LT		 4296 struct nfs4_lock_state *lsp;
4297 int status;
4298
911d1aaf 4299 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4300 status = nfs4_set_lock_state(state, request);
4301 if (status != 0)
4302 goto out;
4303 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4304 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4305 arg.lock_owner.s_dev = server->s_dev;
7c513058 4306 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4307 switch (status) {
4308 case 0:
4309 request->fl_type = F_UNLCK;
4310 break;
4311 case -NFS4ERR_DENIED:
4312 status = 0;
1da177e4 4313 }
70cc6487 4314 request->fl_ops->fl_release_private(request);
8d0a8a9d 4315out:
1da177e4
LT		 4316 return status;
4317}
4318
4319static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4320{
4321 struct nfs4_exception exception = { };
4322 int err;
4323
4324 do {
4325 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4326 _nfs4_proc_getlk(state, cmd, request),
4327 &exception);
4328 } while (exception.retry);
4329 return err;
4330}
4331
4332static int do_vfs_lock(struct file *file, struct file_lock *fl)
4333{
4334 int res = 0;
4335 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4336 case FL_POSIX:
4337 res = posix_lock_file_wait(file, fl);
4338 break;
4339 case FL_FLOCK:
4340 res = flock_lock_file_wait(file, fl);
4341 break;
4342 default:
4343 BUG();
4344 }
1da177e4
LT		 4345 return res;
4346}
4347
faf5f49c 4348struct nfs4_unlockdata {
911d1aaf
TM		 4349 struct nfs_locku_args arg;
4350 struct nfs_locku_res res;
faf5f49c
TM		 4351 struct nfs4_lock_state *lsp;
4352 struct nfs_open_context *ctx;
911d1aaf
TM		 4353 struct file_lock fl;
4354 const struct nfs_server *server;
26e976a8 4355 unsigned long timestamp;
faf5f49c
TM		 4356};
4357
911d1aaf
TM		 4358static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4359 struct nfs_open_context *ctx,
4360 struct nfs4_lock_state *lsp,
4361 struct nfs_seqid *seqid)
4362{
4363 struct nfs4_unlockdata *p;
4364 struct inode *inode = lsp->ls_state->inode;
4365
8535b2be 4366 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4367 if (p == NULL)
4368 return NULL;
4369 p->arg.fh = NFS_FH(inode);
4370 p->arg.fl = &p->fl;
4371 p->arg.seqid = seqid;
c1d51931 4372 p->res.seqid = seqid;
911d1aaf
TM		 4373 p->arg.stateid = &lsp->ls_stateid;
4374 p->lsp = lsp;
4375 atomic_inc(&lsp->ls_count);
4376 /* Ensure we don't close file until we're done freeing locks! */
4377 p->ctx = get_nfs_open_context(ctx);
4378 memcpy(&p->fl, fl, sizeof(p->fl));
4379 p->server = NFS_SERVER(inode);
4380 return p;
4381}
4382
06f814a3 4383static void nfs4_locku_release_calldata(void *data)
faf5f49c 4384{
963d8fe5 4385 struct nfs4_unlockdata *calldata = data;
911d1aaf 4386 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4387 nfs4_put_lock_state(calldata->lsp);
4388 put_nfs_open_context(calldata->ctx);
4389 kfree(calldata);
faf5f49c
TM		 4390}
4391
963d8fe5 4392static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4393{
963d8fe5 4394 struct nfs4_unlockdata *calldata = data;
faf5f49c 4395
14516c3a
TM		 4396 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4397 return;
faf5f49c
TM		 4398 switch (task->tk_status) {
4399 case 0:
f597c537
TM		 4400 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4401 &calldata->res.stateid);
26e976a8 4402 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4403 break;
9e33bed5
TM		 4404 case -NFS4ERR_BAD_STATEID:
4405 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4406 case -NFS4ERR_STALE_STATEID:
4407 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4408 break;
4409 default:
9e33bed5 4410 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4411 rpc_restart_call_prepare(task);
faf5f49c 4412 }
2b1bc308 4413 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4414}
4415
4ce70ada 4416static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4417{
4ce70ada 4418 struct nfs4_unlockdata *calldata = data;
faf5f49c 4419
911d1aaf 4420 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4421 return;
795a88c9 4422 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4423 /* Note: exit _without_ running nfs4_locku_done */
4424 task->tk_action = NULL;
b75ad4cd 4425 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4426 return;
4427 }
26e976a8 4428 calldata->timestamp = jiffies;
035168ab 4429 if (nfs4_setup_sequence(calldata->server,
a893693c 4430 &calldata->arg.seq_args,
2240a9e2
TM		 4431 &calldata->res.seq_res,
4432 task) != 0)
4433 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4434}
4435
963d8fe5 4436static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4437 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4438 .rpc_call_done = nfs4_locku_done,
06f814a3 4439 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4440};
4441
a5d16a4d
TM		 4442static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4443 struct nfs_open_context *ctx,
4444 struct nfs4_lock_state *lsp,
4445 struct nfs_seqid *seqid)
4446{
4447 struct nfs4_unlockdata *data;
5138fde0
TM		 4448 struct rpc_message msg = {
4449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4450 .rpc_cred = ctx->cred,
4451 };
c970aa85
TM		 4452 struct rpc_task_setup task_setup_data = {
4453 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4454 .rpc_message = &msg,
c970aa85 4455 .callback_ops = &nfs4_locku_ops,
101070ca 4456 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4457 .flags = RPC_TASK_ASYNC,
4458 };
a5d16a4d 4459
137d6aca
FF		 4460 /* Ensure this is an unlock - when canceling a lock, the
4461 * canceled lock is passed in, and it won't be an unlock.
4462 */
4463 fl->fl_type = F_UNLCK;
4464
a5d16a4d
TM		 4465 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4466 if (data == NULL) {
4467 nfs_free_seqid(seqid);
4468 return ERR_PTR(-ENOMEM);
4469 }
4470
9d12b216 4471 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4472 msg.rpc_argp = &data->arg;
4473 msg.rpc_resp = &data->res;
c970aa85
TM		 4474 task_setup_data.callback_data = data;
4475 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4476}
4477
faf5f49c
TM		 4478static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4479{
19e03c57 4480 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4481 struct nfs_seqid *seqid;
1da177e4 4482 struct nfs4_lock_state *lsp;
06f814a3
TM		 4483 struct rpc_task *task;
4484 int status = 0;
536ff0f8 4485 unsigned char fl_flags = request->fl_flags;
faf5f49c 4486
8d0a8a9d 4487 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4488 /* Unlock _before_ we do the RPC call */
4489 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4490 down_read(&nfsi->rwsem);
4491 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4492 up_read(&nfsi->rwsem);
9b073574 4493 goto out;
19e03c57
TM		 4494 }
4495 up_read(&nfsi->rwsem);
8d0a8a9d 4496 if (status != 0)
9b073574
TM		 4497 goto out;
4498 /* Is this a delegated lock? */
4499 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4500 goto out;
8d0a8a9d 4501 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4502 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4503 status = -ENOMEM;
911d1aaf 4504 if (seqid == NULL)
9b073574 4505 goto out;
cd3758e3 4506 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4507 status = PTR_ERR(task);
4508 if (IS_ERR(task))
9b073574 4509 goto out;
a5d16a4d 4510 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4511 rpc_put_task(task);
9b073574 4512out:
536ff0f8 4513 request->fl_flags = fl_flags;
1da177e4
LT		 4514 return status;
4515}
4516
a5d16a4d
TM		 4517struct nfs4_lockdata {
4518 struct nfs_lock_args arg;
4519 struct nfs_lock_res res;
4520 struct nfs4_lock_state *lsp;
4521 struct nfs_open_context *ctx;
4522 struct file_lock fl;
26e976a8 4523 unsigned long timestamp;
a5d16a4d
TM		 4524 int rpc_status;
4525 int cancelled;
66179efe 4526 struct nfs_server *server;
a5d16a4d
TM		 4527};
4528
4529static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4530 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4531 gfp_t gfp_mask)
1da177e4 4532{
a5d16a4d
TM		 4533 struct nfs4_lockdata *p;
4534 struct inode *inode = lsp->ls_state->inode;
1da177e4 4535 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4536
8535b2be 4537 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4538 if (p == NULL)
4539 return NULL;
4540
4541 p->arg.fh = NFS_FH(inode);
4542 p->arg.fl = &p->fl;
8535b2be 4543 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4544 if (p->arg.open_seqid == NULL)
4545 goto out_free;
8535b2be 4546 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4547 if (p->arg.lock_seqid == NULL)
2f74c0a0 4548 goto out_free_seqid;
a5d16a4d 4549 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4550 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4551 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4552 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4553 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4554 p->lsp = lsp;
66179efe 4555 p->server = server;
a5d16a4d
TM		 4556 atomic_inc(&lsp->ls_count);
4557 p->ctx = get_nfs_open_context(ctx);
4558 memcpy(&p->fl, fl, sizeof(p->fl));
4559 return p;
2f74c0a0
TM		 4560out_free_seqid:
4561 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4562out_free:
4563 kfree(p);
4564 return NULL;
4565}
4566
4567static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4568{
4569 struct nfs4_lockdata *data = calldata;
4570 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4571
3110ff80 4572 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4573 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4574 return;
a5d16a4d
TM		 4575 /* Do we need to do an open_to_lock_owner? */
4576 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4577 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4578 goto out_release_lock_seqid;
8fe72bac 4579 }
a5d16a4d
TM		 4580 data->arg.open_stateid = &state->stateid;
4581 data->arg.new_lock_owner = 1;
c1d51931 4582 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4583 } else
4584 data->arg.new_lock_owner = 0;
26e976a8 4585 data->timestamp = jiffies;
035168ab
TM		 4586 if (nfs4_setup_sequence(data->server,
4587 &data->arg.seq_args,
2240a9e2 4588 &data->res.seq_res,
d9afbd1b 4589 task) == 0)
66179efe 4590 return;
2240a9e2
TM		 4591 nfs_release_seqid(data->arg.open_seqid);
4592out_release_lock_seqid:
4593 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4594 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4595}
4596
a5d16a4d
TM		 4597static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4598{
4599 struct nfs4_lockdata *data = calldata;
4600
3110ff80 4601 dprintk("%s: begin!\n", __func__);
a5d16a4d 4602
14516c3a
TM		 4603 if (!nfs4_sequence_done(task, &data->res.seq_res))
4604 return;
66179efe 4605
a5d16a4d 4606 data->rpc_status = task->tk_status;
a5d16a4d 4607 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4608 if (data->rpc_status == 0)
4609 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4610 else
4611 goto out;
4612 }
4613 if (data->rpc_status == 0) {
f597c537 4614 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4615 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4616 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4617 }
a5d16a4d 4618out:
3110ff80 4619 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4620}
4621
4622static void nfs4_lock_release(void *calldata)
4623{
4624 struct nfs4_lockdata *data = calldata;
4625
3110ff80 4626 dprintk("%s: begin!\n", __func__);
2f74c0a0 4627 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4628 if (data->cancelled != 0) {
4629 struct rpc_task *task;
4630 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4631 data->arg.lock_seqid);
4632 if (!IS_ERR(task))
bf294b41 4633 rpc_put_task_async(task);
3110ff80 4634 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4635 } else
4636 nfs_free_seqid(data->arg.lock_seqid);
4637 nfs4_put_lock_state(data->lsp);
4638 put_nfs_open_context(data->ctx);
4639 kfree(data);
3110ff80 4640 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4641}
4642
4643static const struct rpc_call_ops nfs4_lock_ops = {
4644 .rpc_call_prepare = nfs4_lock_prepare,
4645 .rpc_call_done = nfs4_lock_done,
4646 .rpc_release = nfs4_lock_release,
4647};
4648
2bee72a6
TM		 4649static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4650{
2bee72a6
TM		 4651 switch (error) {
4652 case -NFS4ERR_ADMIN_REVOKED:
4653 case -NFS4ERR_BAD_STATEID:
ecac799a 4654 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4655 if (new_lock_owner != 0 ||
795a88c9 4656 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4657 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4658 break;
4659 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4660 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4661 case -NFS4ERR_EXPIRED:
4662 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4663 };
4664}
4665
afe6c27c 4666static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4667{
4668 struct nfs4_lockdata *data;
4669 struct rpc_task *task;
5138fde0
TM		 4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4672 .rpc_cred = state->owner->so_cred,
4673 };
c970aa85
TM		 4674 struct rpc_task_setup task_setup_data = {
4675 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4676 .rpc_message = &msg,
c970aa85 4677 .callback_ops = &nfs4_lock_ops,
101070ca 4678 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4679 .flags = RPC_TASK_ASYNC,
4680 };
a5d16a4d
TM		 4681 int ret;
4682
3110ff80 4683 dprintk("%s: begin!\n", __func__);
cd3758e3 4684 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4685 fl->fl_u.nfs4_fl.owner,
4686 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4687 if (data == NULL)
4688 return -ENOMEM;
4689 if (IS_SETLKW(cmd))
4690 data->arg.block = 1;
9d12b216 4691 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4692 msg.rpc_argp = &data->arg;
4693 msg.rpc_resp = &data->res;
c970aa85 4694 task_setup_data.callback_data = data;
8fe72bac
TM		 4695 if (recovery_type > NFS_LOCK_NEW) {
4696 if (recovery_type == NFS_LOCK_RECLAIM)
4697 data->arg.reclaim = NFS_LOCK_RECLAIM;
4698 nfs4_set_sequence_privileged(&data->arg.seq_args);
4699 }
c970aa85 4700 task = rpc_run_task(&task_setup_data);
7a1218a2 4701 if (IS_ERR(task))
a5d16a4d 4702 return PTR_ERR(task);
a5d16a4d
TM		 4703 ret = nfs4_wait_for_completion_rpc_task(task);
4704 if (ret == 0) {
4705 ret = data->rpc_status;
2bee72a6
TM		 4706 if (ret)
4707 nfs4_handle_setlk_error(data->server, data->lsp,
4708 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4709 } else
4710 data->cancelled = 1;
e6b3c4db 4711 rpc_put_task(task);
3110ff80 4712 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4713 return ret;
1da177e4
LT		 4714}
4715
4716static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4717{
202b50dc 4718 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4719 struct nfs4_exception exception = {
4720 .inode = state->inode,
4721 };
202b50dc
TM		 4722 int err;
4723
4724 do {
42a2d13e
TM		 4725 /* Cache the lock if possible... */
4726 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4727 return 0;
afe6c27c 4728 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4729 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4730 break;
4731 nfs4_handle_exception(server, err, &exception);
4732 } while (exception.retry);
4733 return err;
1da177e4
LT		 4734}
4735
4736static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4737{
202b50dc 4738 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4739 struct nfs4_exception exception = {
4740 .inode = state->inode,
4741 };
202b50dc
TM		 4742 int err;
4743
6bfc93ef
TM		 4744 err = nfs4_set_lock_state(state, request);
4745 if (err != 0)
4746 return err;
202b50dc 4747 do {
42a2d13e
TM		 4748 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4749 return 0;
afe6c27c 4750 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4751 switch (err) {
4752 default:
4753 goto out;
4754 case -NFS4ERR_GRACE:
4755 case -NFS4ERR_DELAY:
4756 nfs4_handle_exception(server, err, &exception);
4757 err = 0;
4758 }
202b50dc 4759 } while (exception.retry);
a9ed2e25 4760out:
202b50dc 4761 return err;
1da177e4
LT		 4762}
4763
f062eb6c 4764#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4765/**
4766 * nfs41_check_expired_locks - possibly free a lock stateid
4767 *
4768 * @state: NFSv4 state for an inode
4769 *
4770 * Returns NFS_OK if recovery for this stateid is now finished.
4771 * Otherwise a negative NFS4ERR value is returned.
4772 */
b01dd1d8 4773static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4774{
eb64cf96 4775 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4776 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4777 struct nfs_server *server = NFS_SERVER(state->inode);
4778
b01dd1d8 4779 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4780 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4781 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4782 if (status != NFS_OK) {
3e60ffdd
CL		 4783 /* Free the stateid unless the server
4784 * informs us the stateid is unrecognized. */
89af2739
CL		 4785 if (status != -NFS4ERR_BAD_STATEID)
4786 nfs41_free_stateid(server,
4787 &lsp->ls_stateid);
795a88c9 4788 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4789 ret = status;
4790 }
4791 }
4792 };
4793
4794 return ret;
4795}
4796
4797static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4798{
4799 int status = NFS_OK;
4800
4801 if (test_bit(LK_STATE_IN_USE, &state->flags))
4802 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4803 if (status != NFS_OK)
4804 status = nfs4_lock_expired(state, request);
4805 return status;
f062eb6c
BS		 4806}
4807#endif
4808
1da177e4
LT		 4809static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4810{
19e03c57 4811 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4812 unsigned char fl_flags = request->fl_flags;
8e469ebd 4813 int status = -ENOLCK;
1da177e4 4814
8e469ebd
TM		 4815 if ((fl_flags & FL_POSIX) &&
4816 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4817 goto out;
6bfc93ef 4818 /* Is this a delegated open? */
6bfc93ef
TM		 4819 status = nfs4_set_lock_state(state, request);
4820 if (status != 0)
4821 goto out;
01c3b861
TM		 4822 request->fl_flags |= FL_ACCESS;
4823 status = do_vfs_lock(request->fl_file, request);
4824 if (status < 0)
4825 goto out;
19e03c57 4826 down_read(&nfsi->rwsem);
01c3b861 4827 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4828 /* Yes: cache locks! */
01c3b861 4829 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4830 request->fl_flags = fl_flags & ~FL_SLEEP;
4831 status = do_vfs_lock(request->fl_file, request);
4832 goto out_unlock;
01c3b861 4833 }
afe6c27c 4834 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4835 if (status != 0)
01c3b861 4836 goto out_unlock;
6bfc93ef 4837 /* Note: we always want to sleep here! */
01c3b861 4838 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4839 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4840 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4841 "manager!\n", __func__);
01c3b861 4842out_unlock:
19e03c57 4843 up_read(&nfsi->rwsem);
01c3b861
TM		 4844out:
4845 request->fl_flags = fl_flags;
1da177e4
LT		 4846 return status;
4847}
4848
4849static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4850{
a1d0b5ee
TM		 4851 struct nfs4_exception exception = {
4852 .state = state,
05ffe24f 4853 .inode = state->inode,
a1d0b5ee 4854 };
1da177e4
LT		 4855 int err;
4856
4857 do {
965b5d67
TM		 4858 err = _nfs4_proc_setlk(state, cmd, request);
4859 if (err == -NFS4ERR_DENIED)
4860 err = -EAGAIN;
1da177e4 4861 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4862 err, &exception);
1da177e4
LT		 4863 } while (exception.retry);
4864 return err;
4865}
4866
4867static int
4868nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4869{
4870 struct nfs_open_context *ctx;
4871 struct nfs4_state *state;
4872 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4873 int status;
4874
4875 /* verify open state */
cd3758e3 4876 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4877 state = ctx->state;
4878
4879 if (request->fl_start < 0 || request->fl_end < 0)
4880 return -EINVAL;
4881
d953126a
TM		 4882 if (IS_GETLK(cmd)) {
4883 if (state != NULL)
4884 return nfs4_proc_getlk(state, F_GETLK, request);
4885 return 0;
4886 }
1da177e4
LT		 4887
4888 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4889 return -EINVAL;
4890
d953126a
TM		 4891 if (request->fl_type == F_UNLCK) {
4892 if (state != NULL)
4893 return nfs4_proc_unlck(state, cmd, request);
4894 return 0;
4895 }
1da177e4 4896
d953126a
TM		 4897 if (state == NULL)
4898 return -ENOLCK;
55725513
TM		 4899 /*
4900 * Don't rely on the VFS having checked the file open mode,
4901 * since it won't do this for flock() locks.
4902 */
f44106e2 4903 switch (request->fl_type) {
55725513
TM		 4904 case F_RDLCK:
4905 if (!(filp->f_mode & FMODE_READ))
4906 return -EBADF;
4907 break;
4908 case F_WRLCK:
4909 if (!(filp->f_mode & FMODE_WRITE))
4910 return -EBADF;
4911 }
4912
1da177e4
LT		 4913 do {
4914 status = nfs4_proc_setlk(state, cmd, request);
4915 if ((status != -EAGAIN) || IS_SETLK(cmd))
4916 break;
4917 timeout = nfs4_set_lock_task_retry(timeout);
4918 status = -ERESTARTSYS;
4919 if (signalled())
4920 break;
4921 } while(status < 0);
1da177e4
LT		 4922 return status;
4923}
4924
888e694c
TM		 4925int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4926{
4927 struct nfs_server *server = NFS_SERVER(state->inode);
4928 struct nfs4_exception exception = { };
4929 int err;
4930
4931 err = nfs4_set_lock_state(state, fl);
4932 if (err != 0)
4933 goto out;
4934 do {
afe6c27c 4935 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4936 switch (err) {
4937 default:
a030889a
WAA		 4938 printk(KERN_ERR "NFS: %s: unhandled error "
4939 "%d.\n", __func__, err);
d5122201 4940 case 0:
965b5d67 4941 case -ESTALE:
d5122201
TM		 4942 goto out;
4943 case -NFS4ERR_EXPIRED:
0ced63d1 4944 nfs4_schedule_stateid_recovery(server, state);
d5122201 4945 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4946 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4947 nfs4_schedule_lease_recovery(server->nfs_client);
4948 goto out;
74e7bb73
RL		 4949 case -NFS4ERR_BADSESSION:
4950 case -NFS4ERR_BADSLOT:
4951 case -NFS4ERR_BAD_HIGH_SLOT:
4952 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4953 case -NFS4ERR_DEADSESSION:
9f594791 4954 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4955 goto out;
965b5d67
TM		 4956 case -ERESTARTSYS:
4957 /*
4958 * The show must go on: exit, but mark the
4959 * stateid as needing recovery.
4960 */
a1d0b5ee 4961 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4962 case -NFS4ERR_ADMIN_REVOKED:
4963 case -NFS4ERR_BAD_STATEID:
4964 case -NFS4ERR_OPENMODE:
0400a6b0 4965 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4966 err = 0;
4967 goto out;
4968 case -ENOMEM:
4969 case -NFS4ERR_DENIED:
4970 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4971 err = 0;
4972 goto out;
d5122201
TM		 4973 case -NFS4ERR_DELAY:
4974 break;
4975 }
888e694c
TM		 4976 err = nfs4_handle_exception(server, err, &exception);
4977 } while (exception.retry);
4978out:
4979 return err;
4980}
6b3b5496 4981
cf470c3e
TM		 4982struct nfs_release_lockowner_data {
4983 struct nfs4_lock_state *lsp;
5ae67c4f 4984 struct nfs_server *server;
cf470c3e
TM		 4985 struct nfs_release_lockowner_args args;
4986};
4987
d3c7b7cc
TM		 4988static void nfs4_release_lockowner_release(void *calldata)
4989{
cf470c3e 4990 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4991 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4992 kfree(calldata);
4993}
4994
17280175 4995static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4996 .rpc_release = nfs4_release_lockowner_release,
4997};
4998
cf470c3e 4999int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5000{
5001 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5002 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5003 struct rpc_message msg = {
5004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5005 };
5006
5007 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5008 return -EINVAL;
5009 data = kmalloc(sizeof(*data), GFP_NOFS);
5010 if (!data)
5011 return -ENOMEM;
5012 data->lsp = lsp;
5ae67c4f 5013 data->server = server;
cf470c3e
TM		 5014 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5015 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5016 data->args.lock_owner.s_dev = server->s_dev;
5017 msg.rpc_argp = &data->args;
5018 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5019 return 0;
d3c7b7cc
TM		 5020}
5021
aa1870af
BF		 5022#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5023
64c2ce8b
AK		 5024static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5025 const void *buf, size_t buflen,
5026 int flags, int type)
6b3b5496 5027{
64c2ce8b
AK		 5028 if (strcmp(key, "") != 0)
5029 return -EINVAL;
4b580ee3 5030
64c2ce8b 5031 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5032}
5033
64c2ce8b
AK		 5034static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5035 void *buf, size_t buflen, int type)
6b3b5496 5036{
64c2ce8b
AK		 5037 if (strcmp(key, "") != 0)
5038 return -EINVAL;
aa1870af 5039
64c2ce8b 5040 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5041}
5042
64c2ce8b
AK		 5043static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5044 size_t list_len, const char *name,
5045 size_t name_len, int type)
6b3b5496 5046{
64c2ce8b 5047 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5048
096455a2
BF		 5049 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5050 return 0;
64c2ce8b
AK		 5051
5052 if (list && len <= list_len)
5053 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5054 return len;
6b3b5496
BF		 5055}
5056
533eb461
AA		 5057/*
5058 * nfs_fhget will use either the mounted_on_fileid or the fileid
5059 */
69aaaae1
TM		 5060static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5061{
533eb461
AA		 5062 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5063 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5064 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5065 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5066 return;
5067
5068 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5069 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5070 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5071 fattr->nlink = 2;
5072}
5073
f05d147f
BS		 5074static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5075 const struct qstr *name,
5076 struct nfs4_fs_locations *fs_locations,
5077 struct page *page)
683b57b4
TM		 5078{
5079 struct nfs_server *server = NFS_SERVER(dir);
5080 u32 bitmask[2] = {
361e624f 5081 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5082 };
5083 struct nfs4_fs_locations_arg args = {
5084 .dir_fh = NFS_FH(dir),
c228fd3a 5085 .name = name,
683b57b4
TM		 5086 .page = page,
5087 .bitmask = bitmask,
5088 };
22958463
BH		 5089 struct nfs4_fs_locations_res res = {
5090 .fs_locations = fs_locations,
5091 };
683b57b4
TM		 5092 struct rpc_message msg = {
5093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5094 .rpc_argp = &args,
22958463 5095 .rpc_resp = &res,
683b57b4
TM		 5096 };
5097 int status;
5098
3110ff80 5099 dprintk("%s: start\n", __func__);
533eb461
AA		 5100
5101 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5102 * is not supported */
5103 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5104 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5105 else
5106 bitmask[0] |= FATTR4_WORD0_FILEID;
5107
c228fd3a 5108 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5109 fs_locations->server = server;
830b8e33 5110 fs_locations->nlocations = 0;
f05d147f 5111 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5112 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5113 return status;
5114}
5115
f05d147f
BS		 5116int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5117 const struct qstr *name,
5118 struct nfs4_fs_locations *fs_locations,
5119 struct page *page)
db0a9593
BS		 5120{
5121 struct nfs4_exception exception = { };
5122 int err;
5123 do {
5124 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5125 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5126 &exception);
5127 } while (exception.retry);
5128 return err;
5129}
5130
5a5ea0d4
BS		 5131static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5132{
5133 int status;
5134 struct nfs4_secinfo_arg args = {
5135 .dir_fh = NFS_FH(dir),
5136 .name = name,
5137 };
5138 struct nfs4_secinfo_res res = {
5139 .flavors = flavors,
5140 };
5141 struct rpc_message msg = {
5142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5143 .rpc_argp = &args,
5144 .rpc_resp = &res,
5145 };
5146
5147 dprintk("NFS call secinfo %s\n", name->name);
5148 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5149 dprintk("NFS reply secinfo: %d\n", status);
5150 return status;
5151}
5152
72de53ec
BS		 5153int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5154 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5155{
5156 struct nfs4_exception exception = { };
5157 int err;
5158 do {
5159 err = nfs4_handle_exception(NFS_SERVER(dir),
5160 _nfs4_proc_secinfo(dir, name, flavors),
5161 &exception);
5162 } while (exception.retry);
5163 return err;
5164}
5165
557134a3 5166#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5167/*
5168 * Check the exchange flags returned by the server for invalid flags, having
5169 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5170 * DS flags set.
5171 */
5172static int nfs4_check_cl_exchange_flags(u32 flags)
5173{
5174 if (flags & ~EXCHGID4_FLAG_MASK_R)
5175 goto out_inval;
5176 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5177 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5178 goto out_inval;
5179 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5180 goto out_inval;
5181 return NFS_OK;
5182out_inval:
5183 return -NFS4ERR_INVAL;
5184}
5185
78fe0f41 5186static bool
79d4e1f0
CL		 5187nfs41_same_server_scope(struct nfs41_server_scope *a,
5188 struct nfs41_server_scope *b)
78fe0f41
WAA		 5189{
5190 if (a->server_scope_sz == b->server_scope_sz &&
5191 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5192 return true;
5193
5194 return false;
5195}
5196
7c44f1ae
WAA		 5197/*
5198 * nfs4_proc_bind_conn_to_session()
5199 *
5200 * The 4.1 client currently uses the same TCP connection for the
5201 * fore and backchannel.
5202 */
2cf047c9 5203int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5204{
5205 int status;
5206 struct nfs41_bind_conn_to_session_res res;
5207 struct rpc_message msg = {
5208 .rpc_proc =
5209 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5210 .rpc_argp = clp,
5211 .rpc_resp = &res,
2cf047c9 5212 .rpc_cred = cred,
7c44f1ae
WAA		 5213 };
5214
5215 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5216
5217 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5218 if (unlikely(res.session == NULL)) {
5219 status = -ENOMEM;
5220 goto out;
5221 }
5222
5223 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5224 if (status == 0) {
5225 if (memcmp(res.session->sess_id.data,
5226 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5227 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5228 status = -EIO;
5229 goto out_session;
5230 }
5231 if (res.dir != NFS4_CDFS4_BOTH) {
5232 dprintk("NFS: %s: Unexpected direction from server\n",
5233 __func__);
5234 status = -EIO;
5235 goto out_session;
5236 }
5237 if (res.use_conn_in_rdma_mode) {
5238 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5239 __func__);
5240 status = -EIO;
5241 goto out_session;
5242 }
5243 }
5244out_session:
5245 kfree(res.session);
5246out:
5247 dprintk("<-- %s status= %d\n", __func__, status);
5248 return status;
5249}
5250
99fe60d0
BH		 5251/*
5252 * nfs4_proc_exchange_id()
5253 *
6bbb4ae8
CL		 5254 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5255 *
99fe60d0
BH		 5256 * Since the clientid has expired, all compounds using sessions
5257 * associated with the stale clientid will be returning
5258 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5259 * be in some phase of session reset.
5260 */
4d643d1d 5261int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5262{
5263 nfs4_verifier verifier;
5264 struct nfs41_exchange_id_args args = {
cd93710e 5265 .verifier = &verifier,
99fe60d0 5266 .client = clp,
357f54d6 5267 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5268 };
5269 struct nfs41_exchange_id_res res = {
32b01310 5270 0
99fe60d0
BH		 5271 };
5272 int status;
5273 struct rpc_message msg = {
5274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5275 .rpc_argp = &args,
5276 .rpc_resp = &res,
5277 .rpc_cred = cred,
5278 };
99fe60d0 5279
f092075d 5280 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5281 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5282 sizeof(args.id));
6bbb4ae8
CL		 5283 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5284 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5285 args.id_len, args.id);
99fe60d0 5286
acdeb69d 5287 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5288 GFP_NOFS);
acdeb69d 5289 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5290 status = -ENOMEM;
5291 goto out;
5292 }
78fe0f41 5293
79d4e1f0 5294 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5295 GFP_NOFS);
177313f1 5296 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5297 status = -ENOMEM;
acdeb69d 5298 goto out_server_owner;
abe9a6d5 5299 }
78fe0f41 5300
bbafffd2 5301 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5302 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5303 status = -ENOMEM;
5304 goto out_server_scope;
5305 }
5306
1bd714f2 5307 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5308 if (status == 0)
32b01310 5309 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5310
acdeb69d 5311 if (status == 0) {
32b01310
TM		 5312 clp->cl_clientid = res.clientid;
5313 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5314 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5315 clp->cl_seqid = res.seqid;
5316
acdeb69d
CL		 5317 kfree(clp->cl_serverowner);
5318 clp->cl_serverowner = res.server_owner;
5319 res.server_owner = NULL;
78fe0f41 5320
7d2ed9ac 5321 /* use the most recent implementation id */
59155546
CL		 5322 kfree(clp->cl_implid);
5323 clp->cl_implid = res.impl_id;
7d2ed9ac 5324
177313f1 5325 if (clp->cl_serverscope != NULL &&
79d4e1f0 5326 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5327 res.server_scope)) {
5328 dprintk("%s: server_scope mismatch detected\n",
5329 __func__);
5330 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5331 kfree(clp->cl_serverscope);
5332 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5333 }
5334
177313f1 5335 if (clp->cl_serverscope == NULL) {
79d4e1f0 5336 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5337 goto out;
5338 }
32b01310
TM		 5339 } else
5340 kfree(res.impl_id);
7d2ed9ac 5341
acdeb69d
CL		 5342out_server_owner:
5343 kfree(res.server_owner);
7d2ed9ac 5344out_server_scope:
abe9a6d5
WAA		 5345 kfree(res.server_scope);
5346out:
177313f1 5347 if (clp->cl_implid != NULL)
6bbb4ae8 5348 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5349 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5350 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5351 clp->cl_implid->date.seconds,
5352 clp->cl_implid->date.nseconds);
6bbb4ae8 5353 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5354 return status;
5355}
5356
66245539
TM		 5357static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5358 struct rpc_cred *cred)
5359{
5360 struct rpc_message msg = {
5361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5362 .rpc_argp = clp,
5363 .rpc_cred = cred,
5364 };
5365 int status;
5366
5367 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5368 if (status)
02c67525 5369 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5370 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5371 return status;
5372}
5373
5374static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5375 struct rpc_cred *cred)
5376{
5377 unsigned int loop;
5378 int ret;
5379
5380 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5381 ret = _nfs4_proc_destroy_clientid(clp, cred);
5382 switch (ret) {
5383 case -NFS4ERR_DELAY:
5384 case -NFS4ERR_CLIENTID_BUSY:
5385 ssleep(1);
5386 break;
5387 default:
5388 return ret;
5389 }
5390 }
5391 return 0;
5392}
5393
5394int nfs4_destroy_clientid(struct nfs_client *clp)
5395{
5396 struct rpc_cred *cred;
5397 int ret = 0;
5398
5399 if (clp->cl_mvops->minor_version < 1)
5400 goto out;
5401 if (clp->cl_exchange_flags == 0)
5402 goto out;
05f4c350
CL		 5403 if (clp->cl_preserve_clid)
5404 goto out;
66245539
TM		 5405 cred = nfs4_get_exchange_id_cred(clp);
5406 ret = nfs4_proc_destroy_clientid(clp, cred);
5407 if (cred)
5408 put_rpccred(cred);
5409 switch (ret) {
5410 case 0:
5411 case -NFS4ERR_STALE_CLIENTID:
5412 clp->cl_exchange_flags = 0;
5413 }
5414out:
5415 return ret;
5416}
5417
2050f0cc
AA		 5418struct nfs4_get_lease_time_data {
5419 struct nfs4_get_lease_time_args *args;
5420 struct nfs4_get_lease_time_res *res;
5421 struct nfs_client *clp;
5422};
5423
5424static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5425 void *calldata)
5426{
2050f0cc
AA		 5427 struct nfs4_get_lease_time_data *data =
5428 (struct nfs4_get_lease_time_data *)calldata;
5429
5430 dprintk("--> %s\n", __func__);
5431 /* just setup sequence, do not trigger session recovery
5432 since we're invoked within one */
d9afbd1b
TM		 5433 nfs41_setup_sequence(data->clp->cl_session,
5434 &data->args->la_seq_args,
5435 &data->res->lr_seq_res,
5436 task);
2050f0cc
AA		 5437 dprintk("<-- %s\n", __func__);
5438}
5439
5440/*
5441 * Called from nfs4_state_manager thread for session setup, so don't recover
5442 * from sequence operation or clientid errors.
5443 */
5444static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5445{
5446 struct nfs4_get_lease_time_data *data =
5447 (struct nfs4_get_lease_time_data *)calldata;
5448
5449 dprintk("--> %s\n", __func__);
14516c3a
TM		 5450 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5451 return;
2050f0cc
AA		 5452 switch (task->tk_status) {
5453 case -NFS4ERR_DELAY:
5454 case -NFS4ERR_GRACE:
5455 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5456 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5457 task->tk_status = 0;
a8a4ae3a
AA		 5458 /* fall through */
5459 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5460 rpc_restart_call_prepare(task);
2050f0cc
AA		 5461 return;
5462 }
2050f0cc
AA		 5463 dprintk("<-- %s\n", __func__);
5464}
5465
17280175 5466static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5467 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5468 .rpc_call_done = nfs4_get_lease_time_done,
5469};
5470
5471int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5472{
5473 struct rpc_task *task;
5474 struct nfs4_get_lease_time_args args;
5475 struct nfs4_get_lease_time_res res = {
5476 .lr_fsinfo = fsinfo,
5477 };
5478 struct nfs4_get_lease_time_data data = {
5479 .args = &args,
5480 .res = &res,
5481 .clp = clp,
5482 };
5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5485 .rpc_argp = &args,
5486 .rpc_resp = &res,
5487 };
5488 struct rpc_task_setup task_setup = {
5489 .rpc_client = clp->cl_rpcclient,
5490 .rpc_message = &msg,
5491 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5492 .callback_data = &data,
5493 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5494 };
5495 int status;
5496
9d12b216 5497 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5498 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5499 dprintk("--> %s\n", __func__);
5500 task = rpc_run_task(&task_setup);
5501
5502 if (IS_ERR(task))
5503 status = PTR_ERR(task);
5504 else {
5505 status = task->tk_status;
5506 rpc_put_task(task);
5507 }
5508 dprintk("<-- %s return %d\n", __func__, status);
5509
5510 return status;
5511}
5512
fc931582
AA		 5513/*
5514 * Initialize the values to be used by the client in CREATE_SESSION
5515 * If nfs4_init_session set the fore channel request and response sizes,
5516 * use them.
5517 *
5518 * Set the back channel max_resp_sz_cached to zero to force the client to
5519 * always set csa_cachethis to FALSE because the current implementation
5520 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5521 */
5522static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5523{
5524 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5525 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5526 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5527
5528 if (mxrqst_sz == 0)
5529 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5530 if (mxresp_sz == 0)
5531 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5532 /* Fore channel attributes */
fc931582
AA		 5533 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5534 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5535 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5536 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5537
5538 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5539 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5540 __func__,
5541 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5542 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5543
5544 /* Back channel attributes */
fc931582
AA		 5545 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5546 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5547 args->bc_attrs.max_resp_sz_cached = 0;
5548 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5549 args->bc_attrs.max_reqs = 1;
5550
5551 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5552 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5553 __func__,
5554 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5555 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5556 args->bc_attrs.max_reqs);
5557}
5558
43c2e885 5559static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5560{
43c2e885
BF		 5561 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5562 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5563
43c2e885
BF		 5564 if (rcvd->max_resp_sz > sent->max_resp_sz)
5565 return -EINVAL;
5566 /*
5567 * Our requested max_ops is the minimum we need; we're not
5568 * prepared to break up compounds into smaller pieces than that.
5569 * So, no point even trying to continue if the server won't
5570 * cooperate:
5571 */
5572 if (rcvd->max_ops < sent->max_ops)
5573 return -EINVAL;
5574 if (rcvd->max_reqs == 0)
5575 return -EINVAL;
b4b9a0c1
VG		 5576 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5577 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5578 return 0;
8d35301d
AA		 5579}
5580
43c2e885
BF		 5581static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5582{
5583 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5584 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5585
43c2e885
BF		 5586 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5587 return -EINVAL;
5588 if (rcvd->max_resp_sz < sent->max_resp_sz)
5589 return -EINVAL;
5590 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5591 return -EINVAL;
5592 /* These would render the backchannel useless: */
b4b9a0c1 5593 if (rcvd->max_ops != sent->max_ops)
43c2e885 5594 return -EINVAL;
b4b9a0c1 5595 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5596 return -EINVAL;
5597 return 0;
5598}
8d35301d 5599
8d35301d
AA		 5600static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5601 struct nfs4_session *session)
5602{
43c2e885 5603 int ret;
8d35301d 5604
43c2e885
BF		 5605 ret = nfs4_verify_fore_channel_attrs(args, session);
5606 if (ret)
5607 return ret;
5608 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5609}
5610
848f5bda
TM		 5611static int _nfs4_proc_create_session(struct nfs_client *clp,
5612 struct rpc_cred *cred)
fc931582
AA		 5613{
5614 struct nfs4_session *session = clp->cl_session;
5615 struct nfs41_create_session_args args = {
5616 .client = clp,
5617 .cb_program = NFS4_CALLBACK,
5618 };
5619 struct nfs41_create_session_res res = {
5620 .client = clp,
5621 };
5622 struct rpc_message msg = {
5623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5624 .rpc_argp = &args,
5625 .rpc_resp = &res,
848f5bda 5626 .rpc_cred = cred,
fc931582
AA		 5627 };
5628 int status;
5629
5630 nfs4_init_channel_attrs(&args);
0f91421e 5631 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5632
1bd714f2 5633 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5634
43095d39 5635 if (!status) {
8d35301d
AA		 5636 /* Verify the session's negotiated channel_attrs values */
5637 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5638 /* Increment the clientid slot sequence id */
5639 clp->cl_seqid++;
5640 }
5641
5642 return status;
5643}
5644
5645/*
5646 * Issues a CREATE_SESSION operation to the server.
5647 * It is the responsibility of the caller to verify the session is
5648 * expired before calling this routine.
5649 */
848f5bda 5650int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5651{
5652 int status;
5653 unsigned *ptr;
fc931582
AA		 5654 struct nfs4_session *session = clp->cl_session;
5655
5656 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5657
848f5bda 5658 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5659 if (status)
5660 goto out;
5661
aacd5537
AA		 5662 /* Init or reset the session slot tables */
5663 status = nfs4_setup_session_slot_tables(session);
5664 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5665 if (status)
5666 goto out;
5667
5668 ptr = (unsigned *)&session->sess_id.data[0];
5669 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5670 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5671out:
5672 dprintk("<-- %s\n", __func__);
5673 return status;
5674}
5675
0f3e66c6
AA		 5676/*
5677 * Issue the over-the-wire RPC DESTROY_SESSION.
5678 * The caller must serialize access to this routine.
5679 */
848f5bda
TM		 5680int nfs4_proc_destroy_session(struct nfs4_session *session,
5681 struct rpc_cred *cred)
0f3e66c6 5682{
848f5bda
TM		 5683 struct rpc_message msg = {
5684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5685 .rpc_argp = session,
5686 .rpc_cred = cred,
5687 };
0f3e66c6 5688 int status = 0;
0f3e66c6
AA		 5689
5690 dprintk("--> nfs4_proc_destroy_session\n");
5691
5692 /* session is still being setup */
5693 if (session->clp->cl_cons_state != NFS_CS_READY)
5694 return status;
5695
1bd714f2 5696 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5697
5698 if (status)
08106ac7 5699 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5700 "Session has been destroyed regardless...\n", status);
5701
5702 dprintk("<-- nfs4_proc_destroy_session\n");
5703 return status;
5704}
5705
fc01cea9
AA		 5706/*
5707 * Renew the cl_session lease.
5708 */
d5f8d3fe
TM		 5709struct nfs4_sequence_data {
5710 struct nfs_client *clp;
5711 struct nfs4_sequence_args args;
5712 struct nfs4_sequence_res res;
5713};
5714
dc96aef9
AB		 5715static void nfs41_sequence_release(void *data)
5716{
d5f8d3fe
TM		 5717 struct nfs4_sequence_data *calldata = data;
5718 struct nfs_client *clp = calldata->clp;
dc96aef9 5719
7135840f
AB		 5720 if (atomic_read(&clp->cl_count) > 1)
5721 nfs4_schedule_state_renewal(clp);
5722 nfs_put_client(clp);
d5f8d3fe 5723 kfree(calldata);
dc96aef9
AB		 5724}
5725
aa5190d0
TM		 5726static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5727{
5728 switch(task->tk_status) {
5729 case -NFS4ERR_DELAY:
aa5190d0
TM		 5730 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5731 return -EAGAIN;
5732 default:
0400a6b0 5733 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5734 }
5735 return 0;
5736}
5737
dc96aef9 5738static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5739{
d5f8d3fe
TM		 5740 struct nfs4_sequence_data *calldata = data;
5741 struct nfs_client *clp = calldata->clp;
fc01cea9 5742
14516c3a
TM		 5743 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5744 return;
fc01cea9
AA		 5745
5746 if (task->tk_status < 0) {
5747 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5748 if (atomic_read(&clp->cl_count) == 1)
5749 goto out;
fc01cea9 5750
aa5190d0
TM		 5751 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5752 rpc_restart_call_prepare(task);
fc01cea9
AA		 5753 return;
5754 }
5755 }
fc01cea9 5756 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5757out:
fc01cea9
AA		 5758 dprintk("<-- %s\n", __func__);
5759}
5760
5761static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5762{
d5f8d3fe
TM		 5763 struct nfs4_sequence_data *calldata = data;
5764 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5765 struct nfs4_sequence_args *args;
5766 struct nfs4_sequence_res *res;
5767
fc01cea9
AA		 5768 args = task->tk_msg.rpc_argp;
5769 res = task->tk_msg.rpc_resp;
5770
d9afbd1b 5771 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5772}
5773
5774static const struct rpc_call_ops nfs41_sequence_ops = {
5775 .rpc_call_done = nfs41_sequence_call_done,
5776 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5777 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5778};
5779
8fe72bac
TM		 5780static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5781 struct rpc_cred *cred,
5782 bool is_privileged)
fc01cea9 5783{
d5f8d3fe 5784 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5785 struct rpc_message msg = {
5786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5787 .rpc_cred = cred,
5788 };
71ac6da9
TM		 5789 struct rpc_task_setup task_setup_data = {
5790 .rpc_client = clp->cl_rpcclient,
5791 .rpc_message = &msg,
8fe72bac 5792 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5793 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5794 };
fc01cea9 5795
7135840f 5796 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5797 return ERR_PTR(-EIO);
dfb4f309 5798 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5799 if (calldata == NULL) {
7135840f 5800 nfs_put_client(clp);
71ac6da9 5801 return ERR_PTR(-ENOMEM);
fc01cea9 5802 }
9d12b216 5803 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5804 if (is_privileged)
5805 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5806 msg.rpc_argp = &calldata->args;
5807 msg.rpc_resp = &calldata->res;
5808 calldata->clp = clp;
71ac6da9 5809 task_setup_data.callback_data = calldata;
fc01cea9 5810
71ac6da9
TM		 5811 return rpc_run_task(&task_setup_data);
5812}
5813
2f60ea6b 5814static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5815{
5816 struct rpc_task *task;
5817 int ret = 0;
5818
2f60ea6b
TM		 5819 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5820 return 0;
8fe72bac 5821 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5822 if (IS_ERR(task))
5823 ret = PTR_ERR(task);
5824 else
bf294b41 5825 rpc_put_task_async(task);
71ac6da9
TM		 5826 dprintk("<-- %s status=%d\n", __func__, ret);
5827 return ret;
5828}
5829
5830static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5831{
5832 struct rpc_task *task;
5833 int ret;
5834
8fe72bac 5835 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5836 if (IS_ERR(task)) {
5837 ret = PTR_ERR(task);
5838 goto out;
5839 }
5840 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5841 if (!ret) {
5842 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5843
5844 if (task->tk_status == 0)
5845 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5846 ret = task->tk_status;
b4410c2f 5847 }
71ac6da9
TM		 5848 rpc_put_task(task);
5849out:
5850 dprintk("<-- %s status=%d\n", __func__, ret);
5851 return ret;
fc01cea9
AA		 5852}
5853
fce5c838
RL		 5854struct nfs4_reclaim_complete_data {
5855 struct nfs_client *clp;
5856 struct nfs41_reclaim_complete_args arg;
5857 struct nfs41_reclaim_complete_res res;
5858};
5859
5860static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5861{
5862 struct nfs4_reclaim_complete_data *calldata = data;
5863
d9afbd1b
TM		 5864 nfs41_setup_sequence(calldata->clp->cl_session,
5865 &calldata->arg.seq_args,
5866 &calldata->res.seq_res,
5867 task);
fce5c838
RL		 5868}
5869
aa5190d0
TM		 5870static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5871{
5872 switch(task->tk_status) {
5873 case 0:
5874 case -NFS4ERR_COMPLETE_ALREADY:
5875 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5876 break;
5877 case -NFS4ERR_DELAY:
aa5190d0 5878 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5879 /* fall through */
5880 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5881 return -EAGAIN;
5882 default:
0400a6b0 5883 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5884 }
5885 return 0;
5886}
5887
fce5c838
RL		 5888static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5889{
5890 struct nfs4_reclaim_complete_data *calldata = data;
5891 struct nfs_client *clp = calldata->clp;
5892 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5893
5894 dprintk("--> %s\n", __func__);
14516c3a
TM		 5895 if (!nfs41_sequence_done(task, res))
5896 return;
fce5c838 5897
aa5190d0
TM		 5898 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5899 rpc_restart_call_prepare(task);
5900 return;
5901 }
fce5c838
RL		 5902 dprintk("<-- %s\n", __func__);
5903}
5904
5905static void nfs4_free_reclaim_complete_data(void *data)
5906{
5907 struct nfs4_reclaim_complete_data *calldata = data;
5908
5909 kfree(calldata);
5910}
5911
5912static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5913 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5914 .rpc_call_done = nfs4_reclaim_complete_done,
5915 .rpc_release = nfs4_free_reclaim_complete_data,
5916};
5917
5918/*
5919 * Issue a global reclaim complete.
5920 */
5921static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5922{
5923 struct nfs4_reclaim_complete_data *calldata;
5924 struct rpc_task *task;
5925 struct rpc_message msg = {
5926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5927 };
5928 struct rpc_task_setup task_setup_data = {
5929 .rpc_client = clp->cl_rpcclient,
5930 .rpc_message = &msg,
5931 .callback_ops = &nfs4_reclaim_complete_call_ops,
5932 .flags = RPC_TASK_ASYNC,
5933 };
5934 int status = -ENOMEM;
5935
5936 dprintk("--> %s\n", __func__);
8535b2be 5937 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5938 if (calldata == NULL)
5939 goto out;
5940 calldata->clp = clp;
5941 calldata->arg.one_fs = 0;
fce5c838 5942
9d12b216 5943 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5944 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5945 msg.rpc_argp = &calldata->arg;
5946 msg.rpc_resp = &calldata->res;
5947 task_setup_data.callback_data = calldata;
5948 task = rpc_run_task(&task_setup_data);
acf82b85 5949 if (IS_ERR(task)) {
fce5c838 5950 status = PTR_ERR(task);
acf82b85
DC		 5951 goto out;
5952 }
c34c32ea
AA		 5953 status = nfs4_wait_for_completion_rpc_task(task);
5954 if (status == 0)
5955 status = task->tk_status;
fce5c838 5956 rpc_put_task(task);
acf82b85 5957 return 0;
fce5c838
RL		 5958out:
5959 dprintk("<-- %s status=%d\n", __func__, status);
5960 return status;
5961}
b1f69b75
AA		 5962
5963static void
5964nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5965{
5966 struct nfs4_layoutget *lgp = calldata;
c31663d4 5967 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 5968 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 5969
5970 dprintk("--> %s\n", __func__);
c31663d4
FI		 5971 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5972 * right now covering the LAYOUTGET we are about to send.
5973 * However, that is not so catastrophic, and there seems
5974 * to be no way to prevent it completely.
5975 */
6ba7db34 5976 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 5977 &lgp->res.seq_res, task))
b1f69b75 5978 return;
cf7d63f1
FI		 5979 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5980 NFS_I(lgp->args.inode)->layout,
5981 lgp->args.ctx->state)) {
5982 rpc_exit(task, NFS4_OK);
cf7d63f1 5983 }
b1f69b75
AA		 5984}
5985
5986static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5987{
5988 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 5989 struct inode *inode = lgp->args.inode;
5990 struct nfs_server *server = NFS_SERVER(inode);
5991 struct pnfs_layout_hdr *lo;
5992 struct nfs4_state *state = NULL;
b1f69b75
AA		 5993
5994 dprintk("--> %s\n", __func__);
5995
6ba7db34 5996 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 5997 goto out;
b1f69b75
AA		 5998
5999 switch (task->tk_status) {
6000 case 0:
ee314c2a 6001 goto out;
b1f69b75
AA		 6002 case -NFS4ERR_LAYOUTTRYLATER:
6003 case -NFS4ERR_RECALLCONFLICT:
6004 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6005 break;
6006 case -NFS4ERR_EXPIRED:
6007 case -NFS4ERR_BAD_STATEID:
6008 spin_lock(&inode->i_lock);
6009 lo = NFS_I(inode)->layout;
6010 if (!lo || list_empty(&lo->plh_segs)) {
6011 spin_unlock(&inode->i_lock);
6012 /* If the open stateid was bad, then recover it. */
6013 state = lgp->args.ctx->state;
6014 } else {
6015 LIST_HEAD(head);
6016
6017 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6018 spin_unlock(&inode->i_lock);
6019 /* Mark the bad layout state as invalid, then
6020 * retry using the open stateid. */
6021 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6022 }
6023 }
ee314c2a
TM		 6024 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6025 rpc_restart_call_prepare(task);
6026out:
b1f69b75
AA		 6027 dprintk("<-- %s\n", __func__);
6028}
6029
8554116e
IK		 6030static size_t max_response_pages(struct nfs_server *server)
6031{
6032 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6033 return nfs_page_array_len(0, max_resp_sz);
6034}
6035
6036static void nfs4_free_pages(struct page **pages, size_t size)
6037{
6038 int i;
6039
6040 if (!pages)
6041 return;
6042
6043 for (i = 0; i < size; i++) {
6044 if (!pages[i])
6045 break;
6046 __free_page(pages[i]);
6047 }
6048 kfree(pages);
6049}
6050
6051static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6052{
6053 struct page **pages;
6054 int i;
6055
6056 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6057 if (!pages) {
6058 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6059 return NULL;
6060 }
6061
6062 for (i = 0; i < size; i++) {
6063 pages[i] = alloc_page(gfp_flags);
6064 if (!pages[i]) {
6065 dprintk("%s: failed to allocate page\n", __func__);
6066 nfs4_free_pages(pages, size);
6067 return NULL;
6068 }
6069 }
6070
6071 return pages;
6072}
6073
b1f69b75
AA		 6074static void nfs4_layoutget_release(void *calldata)
6075{
6076 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6077 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6078 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6079
6080 dprintk("--> %s\n", __func__);
8554116e 6081 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6082 put_nfs_open_context(lgp->args.ctx);
6083 kfree(calldata);
6084 dprintk("<-- %s\n", __func__);
6085}
6086
6087static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6088 .rpc_call_prepare = nfs4_layoutget_prepare,
6089 .rpc_call_done = nfs4_layoutget_done,
6090 .rpc_release = nfs4_layoutget_release,
6091};
6092
a0b0a6e3
TM		 6093struct pnfs_layout_segment *
6094nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6095{
6096 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6097 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6098 struct rpc_task *task;
6099 struct rpc_message msg = {
6100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6101 .rpc_argp = &lgp->args,
6102 .rpc_resp = &lgp->res,
6103 };
6104 struct rpc_task_setup task_setup_data = {
6105 .rpc_client = server->client,
6106 .rpc_message = &msg,
6107 .callback_ops = &nfs4_layoutget_call_ops,
6108 .callback_data = lgp,
6109 .flags = RPC_TASK_ASYNC,
6110 };
a0b0a6e3 6111 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6112 int status = 0;
6113
6114 dprintk("--> %s\n", __func__);
6115
8554116e
IK		 6116 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6117 if (!lgp->args.layout.pages) {
6118 nfs4_layoutget_release(lgp);
a0b0a6e3 6119 return ERR_PTR(-ENOMEM);
8554116e
IK		 6120 }
6121 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6122
35124a09 6123 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6124 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6125 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6126 task = rpc_run_task(&task_setup_data);
6127 if (IS_ERR(task))
a0b0a6e3 6128 return ERR_CAST(task);
b1f69b75 6129 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6130 if (status == 0)
6131 status = task->tk_status;
6132 if (status == 0)
a0b0a6e3 6133 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6134 rpc_put_task(task);
6135 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6136 if (status)
6137 return ERR_PTR(status);
6138 return lseg;
b1f69b75
AA		 6139}
6140
cbe82603
BH		 6141static void
6142nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6143{
6144 struct nfs4_layoutreturn *lrp = calldata;
6145
6146 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6147 nfs41_setup_sequence(lrp->clp->cl_session,
6148 &lrp->args.seq_args,
6149 &lrp->res.seq_res,
6150 task);
cbe82603
BH		 6151}
6152
6153static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6154{
6155 struct nfs4_layoutreturn *lrp = calldata;
6156 struct nfs_server *server;
6157
6158 dprintk("--> %s\n", __func__);
6159
6ba7db34 6160 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6161 return;
6162
6163 server = NFS_SERVER(lrp->args.inode);
6164 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6165 rpc_restart_call_prepare(task);
cbe82603
BH		 6166 return;
6167 }
cbe82603
BH		 6168 dprintk("<-- %s\n", __func__);
6169}
6170
6171static void nfs4_layoutreturn_release(void *calldata)
6172{
6173 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6174 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6175
6176 dprintk("--> %s\n", __func__);
849b286f
TM		 6177 spin_lock(&lo->plh_inode->i_lock);
6178 if (lrp->res.lrs_present)
6179 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6180 lo->plh_block_lgets--;
6181 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6182 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6183 kfree(calldata);
6184 dprintk("<-- %s\n", __func__);
6185}
6186
6187static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6188 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6189 .rpc_call_done = nfs4_layoutreturn_done,
6190 .rpc_release = nfs4_layoutreturn_release,
6191};
6192
6193int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6194{
6195 struct rpc_task *task;
6196 struct rpc_message msg = {
6197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6198 .rpc_argp = &lrp->args,
6199 .rpc_resp = &lrp->res,
6200 };
6201 struct rpc_task_setup task_setup_data = {
6202 .rpc_client = lrp->clp->cl_rpcclient,
6203 .rpc_message = &msg,
6204 .callback_ops = &nfs4_layoutreturn_call_ops,
6205 .callback_data = lrp,
6206 };
6207 int status;
6208
6209 dprintk("--> %s\n", __func__);
9d12b216 6210 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6211 task = rpc_run_task(&task_setup_data);
6212 if (IS_ERR(task))
6213 return PTR_ERR(task);
6214 status = task->tk_status;
6215 dprintk("<-- %s status=%d\n", __func__, status);
6216 rpc_put_task(task);
6217 return status;
6218}
6219
7f11d8d3
AA		 6220/*
6221 * Retrieve the list of Data Server devices from the MDS.
6222 */
6223static int _nfs4_getdevicelist(struct nfs_server *server,
6224 const struct nfs_fh *fh,
6225 struct pnfs_devicelist *devlist)
6226{
6227 struct nfs4_getdevicelist_args args = {
6228 .fh = fh,
6229 .layoutclass = server->pnfs_curr_ld->id,
6230 };
6231 struct nfs4_getdevicelist_res res = {
6232 .devlist = devlist,
6233 };
6234 struct rpc_message msg = {
6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6236 .rpc_argp = &args,
6237 .rpc_resp = &res,
6238 };
6239 int status;
6240
6241 dprintk("--> %s\n", __func__);
6242 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6243 &res.seq_res, 0);
6244 dprintk("<-- %s status=%d\n", __func__, status);
6245 return status;
6246}
6247
6248int nfs4_proc_getdevicelist(struct nfs_server *server,
6249 const struct nfs_fh *fh,
6250 struct pnfs_devicelist *devlist)
6251{
6252 struct nfs4_exception exception = { };
6253 int err;
6254
6255 do {
6256 err = nfs4_handle_exception(server,
6257 _nfs4_getdevicelist(server, fh, devlist),
6258 &exception);
6259 } while (exception.retry);
6260
6261 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6262 err, devlist->num_devs);
6263
6264 return err;
6265}
6266EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6267
b1f69b75
AA		 6268static int
6269_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6270{
6271 struct nfs4_getdeviceinfo_args args = {
6272 .pdev = pdev,
6273 };
6274 struct nfs4_getdeviceinfo_res res = {
6275 .pdev = pdev,
6276 };
6277 struct rpc_message msg = {
6278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6279 .rpc_argp = &args,
6280 .rpc_resp = &res,
6281 };
6282 int status;
6283
6284 dprintk("--> %s\n", __func__);
7c513058 6285 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6286 dprintk("<-- %s status=%d\n", __func__, status);
6287
6288 return status;
6289}
6290
6291int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6292{
6293 struct nfs4_exception exception = { };
6294 int err;
6295
6296 do {
6297 err = nfs4_handle_exception(server,
6298 _nfs4_proc_getdeviceinfo(server, pdev),
6299 &exception);
6300 } while (exception.retry);
6301 return err;
6302}
6303EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6304
863a3c6c
AA		 6305static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6306{
6307 struct nfs4_layoutcommit_data *data = calldata;
6308 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6309 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6310
d9afbd1b
TM		 6311 nfs41_setup_sequence(session,
6312 &data->args.seq_args,
6313 &data->res.seq_res,
6314 task);
863a3c6c
AA		 6315}
6316
6317static void
6318nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6319{
6320 struct nfs4_layoutcommit_data *data = calldata;
6321 struct nfs_server *server = NFS_SERVER(data->args.inode);
6322
6ba7db34 6323 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6324 return;
6325
6326 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6327 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6328 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6329 case -NFS4ERR_BADLAYOUT: /* no layout */
6330 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6331 task->tk_status = 0;
e59d27e0
TM		 6332 break;
6333 case 0:
863a3c6c
AA		 6334 nfs_post_op_update_inode_force_wcc(data->args.inode,
6335 data->res.fattr);
e59d27e0
TM		 6336 break;
6337 default:
6338 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6339 rpc_restart_call_prepare(task);
6340 return;
6341 }
6342 }
863a3c6c
AA		 6343}
6344
6345static void nfs4_layoutcommit_release(void *calldata)
6346{
6347 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6348 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6349 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6350
db29c089 6351 pnfs_cleanup_layoutcommit(data);
863a3c6c 6352 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6353 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6354 list_del_init(&lseg->pls_lc_list);
6355 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6356 &lseg->pls_flags))
9369a431 6357 pnfs_put_lseg(lseg);
a9bae566 6358 }
92407e75
PT		 6359
6360 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6361 smp_mb__after_clear_bit();
6362 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6363
863a3c6c
AA		 6364 put_rpccred(data->cred);
6365 kfree(data);
6366}
6367
6368static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6369 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6370 .rpc_call_done = nfs4_layoutcommit_done,
6371 .rpc_release = nfs4_layoutcommit_release,
6372};
6373
6374int
ef311537 6375nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6376{
6377 struct rpc_message msg = {
6378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6379 .rpc_argp = &data->args,
6380 .rpc_resp = &data->res,
6381 .rpc_cred = data->cred,
6382 };
6383 struct rpc_task_setup task_setup_data = {
6384 .task = &data->task,
6385 .rpc_client = NFS_CLIENT(data->args.inode),
6386 .rpc_message = &msg,
6387 .callback_ops = &nfs4_layoutcommit_ops,
6388 .callback_data = data,
6389 .flags = RPC_TASK_ASYNC,
6390 };
6391 struct rpc_task *task;
6392 int status = 0;
6393
6394 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6395 "lbw: %llu inode %lu\n",
6396 data->task.tk_pid, sync,
6397 data->args.lastbytewritten,
6398 data->args.inode->i_ino);
6399
9d12b216 6400 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6401 task = rpc_run_task(&task_setup_data);
6402 if (IS_ERR(task))
6403 return PTR_ERR(task);
ef311537 6404 if (sync == false)
863a3c6c
AA		 6405 goto out;
6406 status = nfs4_wait_for_completion_rpc_task(task);
6407 if (status != 0)
6408 goto out;
6409 status = task->tk_status;
6410out:
6411 dprintk("%s: status %d\n", __func__, status);
6412 rpc_put_task(task);
6413 return status;
6414}
fca78d6d
BS		 6415
6416static int
6417_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6418 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6419{
6420 struct nfs41_secinfo_no_name_args args = {
6421 .style = SECINFO_STYLE_CURRENT_FH,
6422 };
6423 struct nfs4_secinfo_res res = {
6424 .flavors = flavors,
6425 };
6426 struct rpc_message msg = {
6427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6428 .rpc_argp = &args,
6429 .rpc_resp = &res,
6430 };
6431 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6432}
6433
6434static int
6435nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6436 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6437{
6438 struct nfs4_exception exception = { };
6439 int err;
6440 do {
6441 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6442 switch (err) {
6443 case 0:
6444 case -NFS4ERR_WRONGSEC:
6445 case -NFS4ERR_NOTSUPP:
05e9cfb4 6446 goto out;
fca78d6d
BS		 6447 default:
6448 err = nfs4_handle_exception(server, err, &exception);
6449 }
6450 } while (exception.retry);
05e9cfb4 6451out:
fca78d6d
BS		 6452 return err;
6453}
6454
6455static int
6456nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6457 struct nfs_fsinfo *info)
6458{
6459 int err;
6460 struct page *page;
6461 rpc_authflavor_t flavor;
6462 struct nfs4_secinfo_flavors *flavors;
6463
6464 page = alloc_page(GFP_KERNEL);
6465 if (!page) {
6466 err = -ENOMEM;
6467 goto out;
6468 }
6469
6470 flavors = page_address(page);
6471 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6472
6473 /*
6474 * Fall back on "guess and check" method if
6475 * the server doesn't support SECINFO_NO_NAME
6476 */
6477 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6478 err = nfs4_find_root_sec(server, fhandle, info);
6479 goto out_freepage;
6480 }
6481 if (err)
6482 goto out_freepage;
6483
6484 flavor = nfs_find_best_sec(flavors);
6485 if (err == 0)
6486 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6487
6488out_freepage:
6489 put_page(page);
6490 if (err == -EACCES)
6491 return -EPERM;
6492out:
6493 return err;
6494}
1cab0652
BS		 6495
6496static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6497{
6498 int status;
6499 struct nfs41_test_stateid_args args = {
1cab0652 6500 .stateid = stateid,
7d974794
BS		 6501 };
6502 struct nfs41_test_stateid_res res;
6503 struct rpc_message msg = {
6504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6505 .rpc_argp = &args,
6506 .rpc_resp = &res,
6507 };
1cab0652 6508
38527b15 6509 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6510 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6511 nfs4_set_sequence_privileged(&args.seq_args);
6512 status = nfs4_call_sync_sequence(server->client, server, &msg,
6513 &args.seq_args, &res.seq_res);
38527b15
CL		 6514 if (status != NFS_OK) {
6515 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6516 return status;
38527b15
CL		 6517 }
6518 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6519 return -res.status;
7d974794
BS		 6520}
6521
38527b15
CL		 6522/**
6523 * nfs41_test_stateid - perform a TEST_STATEID operation
6524 *
6525 * @server: server / transport on which to perform the operation
6526 * @stateid: state ID to test
6527 *
6528 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6529 * Otherwise a negative NFS4ERR value is returned if the operation
6530 * failed or the state ID is not currently valid.
6531 */
1cab0652 6532static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6533{
6534 struct nfs4_exception exception = { };
6535 int err;
6536 do {
377e507d
CL		 6537 err = _nfs41_test_stateid(server, stateid);
6538 if (err != -NFS4ERR_DELAY)
6539 break;
6540 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6541 } while (exception.retry);
6542 return err;
6543}
9aeda35f 6544
1cab0652 6545static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6546{
9aeda35f 6547 struct nfs41_free_stateid_args args = {
1cab0652 6548 .stateid = stateid,
9aeda35f
BS		 6549 };
6550 struct nfs41_free_stateid_res res;
6551 struct rpc_message msg = {
6552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6553 .rpc_argp = &args,
6554 .rpc_resp = &res,
6555 };
38527b15 6556 int status;
9aeda35f 6557
38527b15 6558 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6559 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6560 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6561 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6562 &args.seq_args, &res.seq_res);
38527b15
CL		 6563 dprintk("NFS reply free_stateid: %d\n", status);
6564 return status;
9aeda35f
BS		 6565}
6566
38527b15
CL		 6567/**
6568 * nfs41_free_stateid - perform a FREE_STATEID operation
6569 *
6570 * @server: server / transport on which to perform the operation
6571 * @stateid: state ID to release
6572 *
6573 * Returns NFS_OK if the server freed "stateid". Otherwise a
6574 * negative NFS4ERR value is returned.
6575 */
1cab0652 6576static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6577{
6578 struct nfs4_exception exception = { };
6579 int err;
6580 do {
377e507d
CL		 6581 err = _nfs4_free_stateid(server, stateid);
6582 if (err != -NFS4ERR_DELAY)
6583 break;
6584 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6585 } while (exception.retry);
6586 return err;
6587}
36281caa
TM		 6588
6589static bool nfs41_match_stateid(const nfs4_stateid *s1,
6590 const nfs4_stateid *s2)
6591{
2d2f24ad 6592 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6593 return false;
6594
2d2f24ad 6595 if (s1->seqid == s2->seqid)
36281caa 6596 return true;
2d2f24ad 6597 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6598 return true;
6599
6600 return false;
6601}
6602
557134a3
AA		 6603#endif /* CONFIG_NFS_V4_1 */
6604
36281caa
TM		 6605static bool nfs4_match_stateid(const nfs4_stateid *s1,
6606 const nfs4_stateid *s2)
6607{
f597c537 6608 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6609}
6610
6611
17280175 6612static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6613 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6614 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6615 .recover_open = nfs4_open_reclaim,
6616 .recover_lock = nfs4_lock_reclaim,
591d71cb 6617 .establish_clid = nfs4_init_clientid,
90a16617 6618 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6619 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6620};
6621
591d71cb 6622#if defined(CONFIG_NFS_V4_1)
17280175 6623static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6624 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6625 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6626 .recover_open = nfs4_open_reclaim,
6627 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6628 .establish_clid = nfs41_init_clientid,
b4b82607 6629 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6630 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6631 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6632};
6633#endif /* CONFIG_NFS_V4_1 */
6634
17280175 6635static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6636 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6637 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6638 .recover_open = nfs4_open_expired,
6639 .recover_lock = nfs4_lock_expired,
6640 .establish_clid = nfs4_init_clientid,
90a16617 6641 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6642};
6643
6644#if defined(CONFIG_NFS_V4_1)
17280175 6645static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6646 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6647 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6648 .recover_open = nfs41_open_expired,
6649 .recover_lock = nfs41_lock_expired,
4d643d1d 6650 .establish_clid = nfs41_init_clientid,
b4b82607 6651 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6652};
591d71cb 6653#endif /* CONFIG_NFS_V4_1 */
1da177e4 6654
17280175 6655static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6656 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6657 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6658 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6659};
6660
6661#if defined(CONFIG_NFS_V4_1)
17280175 6662static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6663 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6664 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6665 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6666};
6667#endif
6668
97dc1359
TM		 6669static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6670 .minor_version = 0,
6671 .call_sync = _nfs4_call_sync,
36281caa 6672 .match_stateid = nfs4_match_stateid,
fca78d6d 6673 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6674 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6675 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6676 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6677};
6678
6679#if defined(CONFIG_NFS_V4_1)
6680static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6681 .minor_version = 1,
104287cd 6682 .call_sync = nfs4_call_sync_sequence,
36281caa 6683 .match_stateid = nfs41_match_stateid,
fca78d6d 6684 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6685 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6686 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6687 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6688};
6689#endif
6690
97dc1359
TM		 6691const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6692 [0] = &nfs_v4_0_minor_ops,
6693#if defined(CONFIG_NFS_V4_1)
6694 [1] = &nfs_v4_1_minor_ops,
6695#endif
6696};
6697
73a79706
BS		 6698const struct inode_operations nfs4_dir_inode_operations = {
6699 .create = nfs_create,
6700 .lookup = nfs_lookup,
6701 .atomic_open = nfs_atomic_open,
6702 .link = nfs_link,
6703 .unlink = nfs_unlink,
6704 .symlink = nfs_symlink,
6705 .mkdir = nfs_mkdir,
6706 .rmdir = nfs_rmdir,
6707 .mknod = nfs_mknod,
6708 .rename = nfs_rename,
6709 .permission = nfs_permission,
6710 .getattr = nfs_getattr,
6711 .setattr = nfs_setattr,
6712 .getxattr = generic_getxattr,
6713 .setxattr = generic_setxattr,
6714 .listxattr = generic_listxattr,
6715 .removexattr = generic_removexattr,
6716};
6717
92e1d5be 6718static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6719 .permission = nfs_permission,
6720 .getattr = nfs_getattr,
6721 .setattr = nfs_setattr,
64c2ce8b
AK		 6722 .getxattr = generic_getxattr,
6723 .setxattr = generic_setxattr,
6724 .listxattr = generic_listxattr,
6725 .removexattr = generic_removexattr,
6b3b5496
BF		 6726};
6727
509de811 6728const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6729 .version = 4, /* protocol version */
6730 .dentry_ops = &nfs4_dentry_operations,
6731 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6732 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6733 .file_ops = &nfs4_file_operations,
1da177e4 6734 .getroot = nfs4_proc_get_root,
281cad46 6735 .submount = nfs4_submount,
ff9099f2 6736 .try_mount = nfs4_try_mount,
1da177e4
LT		 6737 .getattr = nfs4_proc_getattr,
6738 .setattr = nfs4_proc_setattr,
6739 .lookup = nfs4_proc_lookup,
6740 .access = nfs4_proc_access,
6741 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6742 .create = nfs4_proc_create,
6743 .remove = nfs4_proc_remove,
6744 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6745 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6746 .unlink_done = nfs4_proc_unlink_done,
6747 .rename = nfs4_proc_rename,
d3d4152a 6748 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6749 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6750 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6751 .link = nfs4_proc_link,
6752 .symlink = nfs4_proc_symlink,
6753 .mkdir = nfs4_proc_mkdir,
6754 .rmdir = nfs4_proc_remove,
6755 .readdir = nfs4_proc_readdir,
6756 .mknod = nfs4_proc_mknod,
6757 .statfs = nfs4_proc_statfs,
6758 .fsinfo = nfs4_proc_fsinfo,
6759 .pathconf = nfs4_proc_pathconf,
e9326dca 6760 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6761 .decode_dirent = nfs4_decode_dirent,
6762 .read_setup = nfs4_proc_read_setup,
1abb5088 6763 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6764 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6765 .read_done = nfs4_read_done,
1da177e4 6766 .write_setup = nfs4_proc_write_setup,
57208fa7 6767 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6768 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6769 .write_done = nfs4_write_done,
1da177e4 6770 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6771 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6772 .commit_done = nfs4_commit_done,
1da177e4 6773 .lock = nfs4_proc_lock,
e50a1c2e 6774 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6775 .close_context = nfs4_close_context,
2b484297 6776 .open_context = nfs4_atomic_open,
011e2a7f 6777 .have_delegation = nfs4_have_delegation,
57ec14c5 6778 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6779 .alloc_client = nfs4_alloc_client,
45a52a02 6780 .init_client = nfs4_init_client,
cdb7eced 6781 .free_client = nfs4_free_client,
1179acc6
BS		 6782 .create_server = nfs4_create_server,
6783 .clone_server = nfs_clone_server,
1da177e4
LT		 6784};
6785
64c2ce8b
AK		 6786static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6787 .prefix = XATTR_NAME_NFSV4_ACL,
6788 .list = nfs4_xattr_list_nfs4_acl,
6789 .get = nfs4_xattr_get_nfs4_acl,
6790 .set = nfs4_xattr_set_nfs4_acl,
6791};
6792
6793const struct xattr_handler *nfs4_xattr_handlers[] = {
6794 &nfs4_xattr_nfs4_acl_handler,
6795 NULL
6796};
6797
1da177e4
LT		 6798/*
6799 * Local variables:
6800 * c-basic-offset: 8
6801 * End:
6802 */
Linux 6.x block layer and io_uring tree(s)