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Merge branch 'bugfixes' into nfs-for-next
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa
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:
2c643488 336 case -EKEYEXPIRED:
65de872e
TM		 337 ret = nfs4_delay(server->client, &exception->timeout);
338 if (ret != 0)
339 break;
a8a4ae3a 340 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 341 case -NFS4ERR_OLD_STATEID:
342 exception->retry = 1;
b064eca2
TM		 343 break;
344 case -NFS4ERR_BADOWNER:
345 /* The following works around a Linux server bug! */
346 case -NFS4ERR_BADNAME:
347 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
348 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
349 exception->retry = 1;
350 printk(KERN_WARNING "NFS: v4 server %s "
351 "does not accept raw "
352 "uid/gids. "
353 "Reenabling the idmapper.\n",
354 server->nfs_client->cl_hostname);
355 }
65de872e
TM		 356 }
357 /* We failed to handle the error */
358 return nfs4_map_errors(ret);
0400a6b0 359wait_on_recovery:
a2c0b9e2
TM		 360 ret = nfs4_wait_clnt_recover(clp);
361 if (ret == 0)
362 exception->retry = 1;
363 return ret;
65de872e
TM		 364}
365
366
452e9352 367static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 368{
1da177e4
LT		 369 spin_lock(&clp->cl_lock);
370 if (time_before(clp->cl_last_renewal,timestamp))
371 clp->cl_last_renewal = timestamp;
372 spin_unlock(&clp->cl_lock);
373}
374
452e9352
TM		 375static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
376{
377 do_renew_lease(server->nfs_client, timestamp);
378}
379
cccef3b9
AA		 380#if defined(CONFIG_NFS_V4_1)
381
d185a334 382static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 383{
e3725ec0 384 struct nfs4_session *session;
13615871 385 struct nfs4_slot_table *tbl;
c10e4498 386 bool send_new_highest_used_slotid = false;
13615871 387
dfb4f309 388 if (!res->sr_slot) {
13615871
AA		 389 /* just wake up the next guy waiting since
390 * we may have not consumed a slot after all */
691daf3b 391 dprintk("%s: No slot\n", __func__);
35dc1d74 392 return;
13615871 393 }
e3725ec0
TM		 394 tbl = res->sr_slot->table;
395 session = tbl->session;
ea028ac9 396
35dc1d74 397 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 398 /* Be nice to the server: try to ensure that the last transmitted
399 * value for highest_user_slotid <= target_highest_slotid
400 */
401 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
402 send_new_highest_used_slotid = true;
403
b75ad4cd
TM		 404 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
405 send_new_highest_used_slotid = false;
406 goto out_unlock;
407 }
f4af6e2a 408 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 409
410 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
411 send_new_highest_used_slotid = false;
b75ad4cd 412out_unlock:
35dc1d74 413 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 414 res->sr_slot = NULL;
c10e4498
TM		 415 if (send_new_highest_used_slotid)
416 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 417}
418
14516c3a 419static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 420{
e3725ec0 421 struct nfs4_session *session;
933602e3 422 struct nfs4_slot *slot;
b0df806c 423 unsigned long timestamp;
14516c3a 424 struct nfs_client *clp;
b0df806c
AA		 425
426 /*
427 * sr_status remains 1 if an RPC level error occurred. The server
428 * may or may not have processed the sequence operation..
429 * Proceed as if the server received and processed the sequence
430 * operation.
431 */
432 if (res->sr_status == 1)
433 res->sr_status = NFS_OK;
434
468f8613
BS		 435 /* don't increment the sequence number if the task wasn't sent */
436 if (!RPC_WAS_SENT(task))
b0df806c
AA		 437 goto out;
438
933602e3 439 slot = res->sr_slot;
e3725ec0 440 session = slot->table->session;
933602e3 441
691daf3b 442 /* Check the SEQUENCE operation status */
14516c3a
TM		 443 switch (res->sr_status) {
444 case 0:
b0df806c 445 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 446 ++slot->seq_nr;
447 timestamp = slot->renewal_time;
e3725ec0 448 clp = session->clp;
452e9352 449 do_renew_lease(clp, timestamp);
0629e370 450 /* Check sequence flags */
b4410c2f
TM		 451 if (res->sr_status_flags != 0)
452 nfs4_schedule_lease_recovery(clp);
464ee9f9 453 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a
TM		 454 break;
455 case -NFS4ERR_DELAY:
456 /* The server detected a resend of the RPC call and
457 * returned NFS4ERR_DELAY as per Section 2.10.6.2
458 * of RFC5661.
459 */
df2fabff 460 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 461 __func__,
df2fabff 462 slot->slot_nr,
933602e3 463 slot->seq_nr);
14516c3a
TM		 464 goto out_retry;
465 default:
466 /* Just update the slot sequence no. */
933602e3 467 ++slot->seq_nr;
b0df806c
AA		 468 }
469out:
470 /* The session may be reset by one of the error handlers. */
471 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 472 nfs41_sequence_free_slot(res);
14516c3a
TM		 473 return 1;
474out_retry:
d05dd4e9 475 if (!rpc_restart_call(task))
14516c3a
TM		 476 goto out;
477 rpc_delay(task, NFS4_POLL_RETRY_MAX);
478 return 0;
b0df806c
AA		 479}
480
14516c3a
TM		 481static int nfs4_sequence_done(struct rpc_task *task,
482 struct nfs4_sequence_res *res)
df896455 483{
e3725ec0 484 if (res->sr_slot == NULL)
14516c3a
TM		 485 return 1;
486 return nfs41_sequence_done(task, res);
df896455
TM		 487}
488
9d12b216
TM		 489static void nfs41_init_sequence(struct nfs4_sequence_args *args,
490 struct nfs4_sequence_res *res, int cache_reply)
491{
2b2fa717 492 args->sa_slot = NULL;
9d12b216 493 args->sa_cache_this = 0;
8fe72bac 494 args->sa_privileged = 0;
9d12b216
TM		 495 if (cache_reply)
496 args->sa_cache_this = 1;
9d12b216
TM		 497 res->sr_slot = NULL;
498}
499
8fe72bac
TM		 500static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
501{
502 args->sa_privileged = 1;
503}
504
dc70d7b3 505int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
ce5039c1
AA		 508 struct rpc_task *task)
509{
fbcd4abc
AA		 510 struct nfs4_slot *slot;
511 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 512
513 dprintk("--> %s\n", __func__);
ce5039c1 514 /* slot already allocated? */
dfb4f309 515 if (res->sr_slot != NULL)
d9afbd1b 516 goto out_success;
ce5039c1 517
fbcd4abc
AA		 518 tbl = &session->fc_slot_table;
519
69d206b5
TM		 520 task->tk_timeout = 0;
521
fbcd4abc 522 spin_lock(&tbl->slot_tbl_lock);
a2118c33 523 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 524 !args->sa_privileged) {
0b1c8fc4 525 /* The state manager will wait until the slot table is empty */
0b1c8fc4 526 dprintk("%s session is draining\n", __func__);
7b939a3f 527 goto out_sleep;
689cf5c1
AB		 528 }
529
2dc03b7f 530 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 531 if (IS_ERR(slot)) {
532 /* If out of memory, try again in 1/4 second */
533 if (slot == ERR_PTR(-ENOMEM))
534 task->tk_timeout = HZ >> 2;
fbcd4abc 535 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 536 goto out_sleep;
fbcd4abc
AA		 537 }
538 spin_unlock(&tbl->slot_tbl_lock);
539
2b2fa717 540 args->sa_slot = slot;
fbcd4abc 541
2dc03b7f
TM		 542 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
543 slot->slot_nr, slot->seq_nr);
fbcd4abc 544
dfb4f309 545 res->sr_slot = slot;
2a6e26cd 546 res->sr_status_flags = 0;
fbcd4abc
AA		 547 /*
548 * sr_status is only set in decode_sequence, and so will remain
549 * set to 1 if an rpc level failure occurs.
550 */
551 res->sr_status = 1;
d9afbd1b
TM		 552out_success:
553 rpc_call_start(task);
ce5039c1 554 return 0;
7b939a3f 555out_sleep:
8fe72bac
TM		 556 /* Privileged tasks are queued with top priority */
557 if (args->sa_privileged)
1e1093c7
TM		 558 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
559 NULL, RPC_PRIORITY_PRIVILEGED);
560 else
561 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 562 spin_unlock(&tbl->slot_tbl_lock);
563 return -EAGAIN;
ce5039c1 564}
dc70d7b3 565EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 566
035168ab 567int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 568 struct nfs4_sequence_args *args,
569 struct nfs4_sequence_res *res,
ce5039c1
AA		 570 struct rpc_task *task)
571{
035168ab 572 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 573 int ret = 0;
574
d9afbd1b
TM		 575 if (session == NULL) {
576 rpc_call_start(task);
035168ab 577 goto out;
d9afbd1b 578 }
035168ab 579
df2fabff 580 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 581 __func__, session->clp, session, res->sr_slot ?
df2fabff 582 res->sr_slot->slot_nr : -1);
ce5039c1 583
9d12b216 584 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 585out:
586 dprintk("<-- %s status=%d\n", __func__, ret);
587 return ret;
588}
589
590struct nfs41_call_sync_data {
035168ab 591 const struct nfs_server *seq_server;
ce5039c1
AA		 592 struct nfs4_sequence_args *seq_args;
593 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 594};
595
596static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
597{
598 struct nfs41_call_sync_data *data = calldata;
6ba7db34 599 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 600
035168ab
TM		 601 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
602
d9afbd1b 603 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 604}
605
69ab40c4
AA		 606static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
607{
608 struct nfs41_call_sync_data *data = calldata;
609
14516c3a 610 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 611}
612
17280175 613static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 614 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 615 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 616};
617
7c513058
BS		 618static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
619 struct nfs_server *server,
ce5039c1
AA		 620 struct rpc_message *msg,
621 struct nfs4_sequence_args *args,
8fe72bac 622 struct nfs4_sequence_res *res)
ce5039c1
AA		 623{
624 int ret;
625 struct rpc_task *task;
626 struct nfs41_call_sync_data data = {
035168ab 627 .seq_server = server,
ce5039c1
AA		 628 .seq_args = args,
629 .seq_res = res,
ce5039c1
AA		 630 };
631 struct rpc_task_setup task_setup = {
7c513058 632 .rpc_client = clnt,
ce5039c1
AA		 633 .rpc_message = msg,
634 .callback_ops = &nfs41_call_sync_ops,
635 .callback_data = &data
636 };
637
ce5039c1
AA		 638 task = rpc_run_task(&task_setup);
639 if (IS_ERR(task))
640 ret = PTR_ERR(task);
641 else {
642 ret = task->tk_status;
643 rpc_put_task(task);
644 }
645 return ret;
646}
647
df896455 648#else
8fe72bac 649static
9d12b216
TM		 650void nfs41_init_sequence(struct nfs4_sequence_args *args,
651 struct nfs4_sequence_res *res, int cache_reply)
652{
653}
654
8fe72bac
TM		 655static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
656{
657}
658
659
14516c3a
TM		 660static int nfs4_sequence_done(struct rpc_task *task,
661 struct nfs4_sequence_res *res)
df896455 662{
14516c3a 663 return 1;
df896455 664}
cccef3b9
AA		 665#endif /* CONFIG_NFS_V4_1 */
666
fd0c0953 667static
7c513058
BS		 668int _nfs4_call_sync(struct rpc_clnt *clnt,
669 struct nfs_server *server,
cccef3b9
AA		 670 struct rpc_message *msg,
671 struct nfs4_sequence_args *args,
fd0c0953 672 struct nfs4_sequence_res *res)
cccef3b9 673{
7c513058 674 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 675}
676
fd0c0953 677static
7c513058
BS		 678int nfs4_call_sync(struct rpc_clnt *clnt,
679 struct nfs_server *server,
e73b83f2
BS		 680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
683 int cache_reply)
684{
fd0c0953 685 nfs41_init_sequence(args, res, cache_reply);
7c513058 686 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 687 args, res);
e73b83f2 688}
cccef3b9 689
38478b24 690static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 691{
38478b24 692 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 693
38478b24 694 spin_lock(&dir->i_lock);
359d7d1c 695 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 696 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 697 nfs_force_lookup_revalidate(dir);
a9a4a87a 698 dir->i_version = cinfo->after;
38478b24 699 spin_unlock(&dir->i_lock);
1da177e4
LT		 700}
701
e56e0b78 702struct nfs4_opendata {
c6d00e63 703 struct kref kref;
e56e0b78
TM		 704 struct nfs_openargs o_arg;
705 struct nfs_openres o_res;
cdd4e68b
TM		 706 struct nfs_open_confirmargs c_arg;
707 struct nfs_open_confirmres c_res;
6926afd1
TM		 708 struct nfs4_string owner_name;
709 struct nfs4_string group_name;
e56e0b78 710 struct nfs_fattr f_attr;
e56e0b78 711 struct dentry *dir;
82a2c1b7 712 struct dentry *dentry;
e56e0b78 713 struct nfs4_state_owner *owner;
aac00a8d 714 struct nfs4_state *state;
e56e0b78 715 struct iattr attrs;
26e976a8 716 unsigned long timestamp;
3e309914 717 unsigned int rpc_done : 1;
24ac23ab
TM		 718 int rpc_status;
719 int cancelled;
e56e0b78
TM		 720};
721
2ced46c2
TM		 722
723static void nfs4_init_opendata_res(struct nfs4_opendata *p)
724{
725 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 726 p->o_res.seqid = p->o_arg.seqid;
727 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 728 p->o_res.server = p->o_arg.server;
5f657530 729 p->o_res.access_request = p->o_arg.access;
2ced46c2 730 nfs_fattr_init(&p->f_attr);
6926afd1 731 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 732}
733
82a2c1b7 734static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 735 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 736 const struct iattr *attrs,
737 gfp_t gfp_mask)
e56e0b78 738{
82a2c1b7 739 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 740 struct inode *dir = parent->d_inode;
741 struct nfs_server *server = NFS_SERVER(dir);
742 struct nfs4_opendata *p;
743
8535b2be 744 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 745 if (p == NULL)
746 goto err;
8535b2be 747 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 748 if (p->o_arg.seqid == NULL)
749 goto err_free;
82a2c1b7
AV		 750 nfs_sb_active(dentry->d_sb);
751 p->dentry = dget(dentry);
e56e0b78
TM		 752 p->dir = parent;
753 p->owner = sp;
754 atomic_inc(&sp->so_count);
755 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 756 p->o_arg.open_flags = flags;
757 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 758 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
759 * will return permission denied for all bits until close */
760 if (!(flags & O_EXCL)) {
761 /* ask server to check for all possible rights as results
762 * are cached */
763 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
764 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 765 }
7539bbab 766 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 767 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
768 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 769 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 770 p->o_arg.server = server;
771 p->o_arg.bitmask = server->attr_bitmask;
1549210f 772 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 773 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 774 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 775 __be32 verf[2];
d77d76ff 776
e56e0b78
TM		 777 p->o_arg.u.attrs = &p->attrs;
778 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 779
780 verf[0] = jiffies;
781 verf[1] = current->pid;
782 memcpy(p->o_arg.u.verifier.data, verf,
783 sizeof(p->o_arg.u.verifier.data));
e56e0b78 784 }
cdd4e68b
TM		 785 p->c_arg.fh = &p->o_res.fh;
786 p->c_arg.stateid = &p->o_res.stateid;
787 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 788 nfs4_init_opendata_res(p);
c6d00e63 789 kref_init(&p->kref);
e56e0b78
TM		 790 return p;
791err_free:
792 kfree(p);
793err:
794 dput(parent);
795 return NULL;
796}
797
c6d00e63 798static void nfs4_opendata_free(struct kref *kref)
e56e0b78 799{
c6d00e63
TM		 800 struct nfs4_opendata *p = container_of(kref,
801 struct nfs4_opendata, kref);
82a2c1b7 802 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 803
804 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 805 if (p->state != NULL)
806 nfs4_put_open_state(p->state);
c6d00e63
TM		 807 nfs4_put_state_owner(p->owner);
808 dput(p->dir);
82a2c1b7
AV		 809 dput(p->dentry);
810 nfs_sb_deactive(sb);
6926afd1 811 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 812 kfree(p);
813}
814
815static void nfs4_opendata_put(struct nfs4_opendata *p)
816{
817 if (p != NULL)
818 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 819}
820
06f814a3
TM		 821static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
822{
06f814a3
TM		 823 int ret;
824
06f814a3 825 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 826 return ret;
827}
828
dc0b027d 829static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 830{
831 int ret = 0;
dc0b027d 832
536e43d1 833 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 834 goto out;
835 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 836 case FMODE_READ:
88069f77
TM		 837 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
838 && state->n_rdonly != 0;
6ee41268
TM		 839 break;
840 case FMODE_WRITE:
88069f77
TM		 841 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
842 && state->n_wronly != 0;
6ee41268
TM		 843 break;
844 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 845 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
846 && state->n_rdwr != 0;
6ee41268 847 }
dc0b027d 848out:
6ee41268
TM		 849 return ret;
850}
851
dc0b027d 852static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 853{
652f89f6
TM		 854 if (delegation == NULL)
855 return 0;
dc0b027d 856 if ((delegation->type & fmode) != fmode)
aac00a8d 857 return 0;
15c831bf 858 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 859 return 0;
b7391f44 860 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 861 return 1;
862}
863
dc0b027d 864static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 865{
dc0b027d 866 switch (fmode) {
e7616923
TM		 867 case FMODE_WRITE:
868 state->n_wronly++;
869 break;
870 case FMODE_READ:
871 state->n_rdonly++;
872 break;
873 case FMODE_READ|FMODE_WRITE:
874 state->n_rdwr++;
875 }
dc0b027d 876 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 877}
878
dc0b027d 879static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 880{
881 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 882 nfs4_stateid_copy(&state->stateid, stateid);
883 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 884 switch (fmode) {
003707c7
TM		 885 case FMODE_READ:
886 set_bit(NFS_O_RDONLY_STATE, &state->flags);
887 break;
888 case FMODE_WRITE:
889 set_bit(NFS_O_WRONLY_STATE, &state->flags);
890 break;
891 case FMODE_READ|FMODE_WRITE:
892 set_bit(NFS_O_RDWR_STATE, &state->flags);
893 }
e7616923
TM		 894}
895
dc0b027d 896static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 897{
8bda4e4c 898 write_seqlock(&state->seqlock);
dc0b027d 899 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 900 write_sequnlock(&state->seqlock);
003707c7
TM		 901}
902
dc0b027d 903static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 904{
8bda4e4c
TM		 905 /*
906 * Protect the call to nfs4_state_set_mode_locked and
907 * serialise the stateid update
908 */
909 write_seqlock(&state->seqlock);
003707c7 910 if (deleg_stateid != NULL) {
f597c537 911 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 912 set_bit(NFS_DELEGATED_STATE, &state->flags);
913 }
914 if (open_stateid != NULL)
dc0b027d 915 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 916 write_sequnlock(&state->seqlock);
917 spin_lock(&state->owner->so_lock);
dc0b027d 918 update_open_stateflags(state, fmode);
ec073428 919 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 920}
921
dc0b027d 922static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 923{
924 struct nfs_inode *nfsi = NFS_I(state->inode);
925 struct nfs_delegation *deleg_cur;
926 int ret = 0;
927
dc0b027d 928 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 929
930 rcu_read_lock();
931 deleg_cur = rcu_dereference(nfsi->delegation);
932 if (deleg_cur == NULL)
933 goto no_delegation;
934
935 spin_lock(&deleg_cur->lock);
936 if (nfsi->delegation != deleg_cur ||
dc0b027d 937 (deleg_cur->type & fmode) != fmode)
34310430
TM		 938 goto no_delegation_unlock;
939
940 if (delegation == NULL)
941 delegation = &deleg_cur->stateid;
f597c537 942 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 943 goto no_delegation_unlock;
944
b7391f44 945 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 946 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 947 ret = 1;
948no_delegation_unlock:
949 spin_unlock(&deleg_cur->lock);
950no_delegation:
951 rcu_read_unlock();
952
953 if (!ret && open_stateid != NULL) {
dc0b027d 954 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 955 ret = 1;
956 }
957
958 return ret;
959}
960
961
dc0b027d 962static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 963{
964 struct nfs_delegation *delegation;
965
966 rcu_read_lock();
967 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 968 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 969 rcu_read_unlock();
970 return;
971 }
972 rcu_read_unlock();
57ec14c5 973 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 974}
975
6ee41268 976static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 977{
978 struct nfs4_state *state = opendata->state;
979 struct nfs_inode *nfsi = NFS_I(state->inode);
980 struct nfs_delegation *delegation;
536e43d1 981 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 982 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 983 nfs4_stateid stateid;
984 int ret = -EAGAIN;
985
aac00a8d 986 for (;;) {
dc0b027d 987 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 988 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 989 if (can_open_cached(state, fmode, open_mode)) {
990 update_open_stateflags(state, fmode);
6ee41268 991 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 992 goto out_return_state;
993 }
994 spin_unlock(&state->owner->so_lock);
995 }
34310430
TM		 996 rcu_read_lock();
997 delegation = rcu_dereference(nfsi->delegation);
652f89f6 998 if (!can_open_delegated(delegation, fmode)) {
34310430 999 rcu_read_unlock();
aac00a8d 1000 break;
34310430 1001 }
aac00a8d 1002 /* Save the delegation */
f597c537 1003 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1004 rcu_read_unlock();
af22f94a 1005 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1006 if (ret != 0)
1007 goto out;
1008 ret = -EAGAIN;
34310430
TM		 1009
1010 /* Try to update the stateid using the delegation */
dc0b027d 1011 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1012 goto out_return_state;
aac00a8d 1013 }
aac00a8d
TM		 1014out:
1015 return ERR_PTR(ret);
1016out_return_state:
1017 atomic_inc(&state->count);
1018 return state;
1019}
1020
e23008ec
AA		 1021static void
1022nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1023{
1024 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1025 struct nfs_delegation *delegation;
1026 int delegation_flags = 0;
1027
1028 rcu_read_lock();
1029 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1030 if (delegation)
1031 delegation_flags = delegation->flags;
1032 rcu_read_unlock();
1033 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1034 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1035 "returning a delegation for "
1036 "OPEN(CLAIM_DELEGATE_CUR)\n",
1037 clp->cl_hostname);
1038 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1039 nfs_inode_set_delegation(state->inode,
1040 data->owner->so_cred,
1041 &data->o_res);
1042 else
1043 nfs_inode_reclaim_delegation(state->inode,
1044 data->owner->so_cred,
1045 &data->o_res);
1046}
1047
1048/*
1049 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1050 * and update the nfs4_state.
1051 */
1052static struct nfs4_state *
1053_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1054{
1055 struct inode *inode = data->state->inode;
1056 struct nfs4_state *state = data->state;
1057 int ret;
1058
1059 if (!data->rpc_done) {
1060 ret = data->rpc_status;
1061 goto err;
1062 }
1063
1064 ret = -ESTALE;
1065 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1066 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1067 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1068 goto err;
1069
1070 ret = -ENOMEM;
1071 state = nfs4_get_open_state(inode, data->owner);
1072 if (state == NULL)
1073 goto err;
1074
1075 ret = nfs_refresh_inode(inode, &data->f_attr);
1076 if (ret)
1077 goto err;
1078
1079 if (data->o_res.delegation_type != 0)
1080 nfs4_opendata_check_deleg(data, state);
1081 update_open_stateid(state, &data->o_res.stateid, NULL,
1082 data->o_arg.fmode);
1083
1084 return state;
1085err:
1086 return ERR_PTR(ret);
1087
1088}
1089
1090static struct nfs4_state *
1091_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1092{
1093 struct inode *inode;
1094 struct nfs4_state *state = NULL;
1b370bc2 1095 int ret;
24ac23ab 1096
aac00a8d 1097 if (!data->rpc_done) {
6ee41268 1098 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1099 goto out;
1100 }
1101
1b370bc2 1102 ret = -EAGAIN;
24ac23ab 1103 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1104 goto err;
24ac23ab 1105 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1106 ret = PTR_ERR(inode);
03f28e3a 1107 if (IS_ERR(inode))
1b370bc2
TM		 1108 goto err;
1109 ret = -ENOMEM;
24ac23ab
TM		 1110 state = nfs4_get_open_state(inode, data->owner);
1111 if (state == NULL)
1b370bc2 1112 goto err_put_inode;
e23008ec
AA		 1113 if (data->o_res.delegation_type != 0)
1114 nfs4_opendata_check_deleg(data, state);
34310430 1115 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1116 data->o_arg.fmode);
24ac23ab 1117 iput(inode);
aac00a8d 1118out:
24ac23ab 1119 return state;
1b370bc2
TM		 1120err_put_inode:
1121 iput(inode);
1122err:
1123 return ERR_PTR(ret);
24ac23ab
TM		 1124}
1125
e23008ec
AA		 1126static struct nfs4_state *
1127nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1128{
1129 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1130 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1131 return _nfs4_opendata_to_nfs4_state(data);
1132}
1133
864472e9
TM		 1134static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1135{
1136 struct nfs_inode *nfsi = NFS_I(state->inode);
1137 struct nfs_open_context *ctx;
1138
1139 spin_lock(&state->inode->i_lock);
1140 list_for_each_entry(ctx, &nfsi->open_files, list) {
1141 if (ctx->state != state)
1142 continue;
1143 get_nfs_open_context(ctx);
1144 spin_unlock(&state->inode->i_lock);
1145 return ctx;
1146 }
1147 spin_unlock(&state->inode->i_lock);
1148 return ERR_PTR(-ENOENT);
1149}
1150
6f220ed5
TM		 1151static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1152{
1153 struct nfs4_opendata *opendata;
1154
3d4ff43d 1155 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1156 if (opendata == NULL)
1157 return ERR_PTR(-ENOMEM);
1158 opendata->state = state;
1159 atomic_inc(&state->count);
1160 return opendata;
1161}
1162
dc0b027d 1163static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1164{
2ced46c2 1165 struct nfs4_state *newstate;
864472e9
TM		 1166 int ret;
1167
dc0b027d
TM		 1168 opendata->o_arg.open_flags = 0;
1169 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1170 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1171 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1172 nfs4_init_opendata_res(opendata);
b257957e 1173 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1174 if (ret != 0)
1175 return ret;
2ced46c2 1176 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1177 if (IS_ERR(newstate))
1178 return PTR_ERR(newstate);
643168c2 1179 nfs4_close_state(newstate, fmode);
2ced46c2 1180 *res = newstate;
864472e9
TM		 1181 return 0;
1182}
1183
1184static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1185{
864472e9 1186 struct nfs4_state *newstate;
864472e9
TM		 1187 int ret;
1188
1189 /* memory barrier prior to reading state->n_* */
2ced46c2 1190 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1191 smp_rmb();
1192 if (state->n_rdwr != 0) {
b0ed9dbc 1193 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1194 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1195 if (ret != 0)
1196 return ret;
2ced46c2
TM		 1197 if (newstate != state)
1198 return -ESTALE;
864472e9
TM		 1199 }
1200 if (state->n_wronly != 0) {
b0ed9dbc 1201 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1202 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1203 if (ret != 0)
1204 return ret;
2ced46c2
TM		 1205 if (newstate != state)
1206 return -ESTALE;
864472e9
TM		 1207 }
1208 if (state->n_rdonly != 0) {
b0ed9dbc 1209 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1210 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1211 if (ret != 0)
1212 return ret;
2ced46c2
TM		 1213 if (newstate != state)
1214 return -ESTALE;
864472e9 1215 }
1ac7e2fd
TM		 1216 /*
1217 * We may have performed cached opens for all three recoveries.
1218 * Check if we need to update the current stateid.
1219 */
1220 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1221 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1222 write_seqlock(&state->seqlock);
1ac7e2fd 1223 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1224 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1225 write_sequnlock(&state->seqlock);
1ac7e2fd 1226 }
864472e9
TM		 1227 return 0;
1228}
1229
1da177e4
LT		 1230/*
1231 * OPEN_RECLAIM:
1232 * reclaim state on the server after a reboot.
1da177e4 1233 */
539cd03a 1234static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1235{
1ac7e2fd 1236 struct nfs_delegation *delegation;
864472e9 1237 struct nfs4_opendata *opendata;
dc0b027d 1238 fmode_t delegation_type = 0;
1da177e4
LT		 1239 int status;
1240
6f220ed5
TM		 1241 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1242 if (IS_ERR(opendata))
1243 return PTR_ERR(opendata);
864472e9
TM		 1244 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1245 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1246 rcu_read_lock();
1247 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1248 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1249 delegation_type = delegation->type;
1ac7e2fd 1250 rcu_read_unlock();
864472e9
TM		 1251 opendata->o_arg.u.delegation_type = delegation_type;
1252 status = nfs4_open_recover(opendata, state);
c6d00e63 1253 nfs4_opendata_put(opendata);
1da177e4
LT		 1254 return status;
1255}
1256
539cd03a 1257static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1258{
1259 struct nfs_server *server = NFS_SERVER(state->inode);
1260 struct nfs4_exception exception = { };
1261 int err;
1262 do {
539cd03a 1263 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1264 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1265 break;
1266 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1267 } while (exception.retry);
1268 return err;
1269}
1270
864472e9
TM		 1271static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1272{
1273 struct nfs_open_context *ctx;
1274 int ret;
1275
1276 ctx = nfs4_state_find_open_context(state);
1277 if (IS_ERR(ctx))
1278 return PTR_ERR(ctx);
539cd03a 1279 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1280 put_nfs_open_context(ctx);
1281 return ret;
1282}
1283
13437e12 1284static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1285{
e56e0b78 1286 struct nfs4_opendata *opendata;
864472e9 1287 int ret;
1da177e4 1288
6f220ed5
TM		 1289 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1290 if (IS_ERR(opendata))
1291 return PTR_ERR(opendata);
e56e0b78 1292 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1293 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1294 ret = nfs4_open_recover(opendata, state);
c6d00e63 1295 nfs4_opendata_put(opendata);
864472e9 1296 return ret;
1da177e4
LT		 1297}
1298
13437e12 1299int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1300{
1301 struct nfs4_exception exception = { };
539cd03a 1302 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1303 int err;
1304 do {
13437e12 1305 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1306 switch (err) {
1307 case 0:
965b5d67
TM		 1308 case -ENOENT:
1309 case -ESTALE:
1310 goto out;
bcfa49f6
RL		 1311 case -NFS4ERR_BADSESSION:
1312 case -NFS4ERR_BADSLOT:
1313 case -NFS4ERR_BAD_HIGH_SLOT:
1314 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1315 case -NFS4ERR_DEADSESSION:
9f594791 1316 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1317 goto out;
1da177e4
LT		 1318 case -NFS4ERR_STALE_CLIENTID:
1319 case -NFS4ERR_STALE_STATEID:
1320 case -NFS4ERR_EXPIRED:
1321 /* Don't recall a delegation if it was lost */
0400a6b0 1322 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1323 goto out;
1324 case -ERESTARTSYS:
1325 /*
1326 * The show must go on: exit, but mark the
1327 * stateid as needing recovery.
1328 */
a1d0b5ee 1329 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1330 case -NFS4ERR_ADMIN_REVOKED:
1331 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1332 nfs_inode_find_state_and_recover(state->inode,
1333 stateid);
0400a6b0 1334 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1335 case -EKEYEXPIRED:
1336 /*
1337 * User RPCSEC_GSS context has expired.
1338 * We cannot recover this stateid now, so
1339 * skip it and allow recovery thread to
1340 * proceed.
1341 */
965b5d67
TM		 1342 case -ENOMEM:
1343 err = 0;
1344 goto out;
1da177e4
LT		 1345 }
1346 err = nfs4_handle_exception(server, err, &exception);
1347 } while (exception.retry);
965b5d67 1348out:
1da177e4
LT		 1349 return err;
1350}
1351
cdd4e68b
TM		 1352static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1353{
1354 struct nfs4_opendata *data = calldata;
1355
1356 data->rpc_status = task->tk_status;
26e976a8 1357 if (data->rpc_status == 0) {
f597c537 1358 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1359 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1360 renew_lease(data->o_res.server, data->timestamp);
3e309914 1361 data->rpc_done = 1;
26e976a8 1362 }
cdd4e68b
TM		 1363}
1364
1365static void nfs4_open_confirm_release(void *calldata)
1366{
1367 struct nfs4_opendata *data = calldata;
1368 struct nfs4_state *state = NULL;
1369
1370 /* If this request hasn't been cancelled, do nothing */
1371 if (data->cancelled == 0)
1372 goto out_free;
1373 /* In case of error, no cleanup! */
3e309914 1374 if (!data->rpc_done)
cdd4e68b 1375 goto out_free;
cdd4e68b 1376 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1377 if (!IS_ERR(state))
643168c2 1378 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1379out_free:
c6d00e63 1380 nfs4_opendata_put(data);
cdd4e68b
TM		 1381}
1382
1383static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1384 .rpc_call_done = nfs4_open_confirm_done,
1385 .rpc_release = nfs4_open_confirm_release,
1386};
1387
1388/*
1389 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1390 */
1391static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1392{
1393 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1394 struct rpc_task *task;
5138fde0
TM		 1395 struct rpc_message msg = {
1396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1397 .rpc_argp = &data->c_arg,
1398 .rpc_resp = &data->c_res,
1399 .rpc_cred = data->owner->so_cred,
1400 };
c970aa85
TM		 1401 struct rpc_task_setup task_setup_data = {
1402 .rpc_client = server->client,
5138fde0 1403 .rpc_message = &msg,
c970aa85
TM		 1404 .callback_ops = &nfs4_open_confirm_ops,
1405 .callback_data = data,
101070ca 1406 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1407 .flags = RPC_TASK_ASYNC,
1408 };
1da177e4
LT		 1409 int status;
1410
c6d00e63 1411 kref_get(&data->kref);
3e309914
TM		 1412 data->rpc_done = 0;
1413 data->rpc_status = 0;
5138fde0 1414 data->timestamp = jiffies;
c970aa85 1415 task = rpc_run_task(&task_setup_data);
7a1218a2 1416 if (IS_ERR(task))
cdd4e68b 1417 return PTR_ERR(task);
cdd4e68b
TM		 1418 status = nfs4_wait_for_completion_rpc_task(task);
1419 if (status != 0) {
1420 data->cancelled = 1;
1421 smp_wmb();
1422 } else
1423 status = data->rpc_status;
e6b3c4db 1424 rpc_put_task(task);
1da177e4
LT		 1425 return status;
1426}
1427
24ac23ab 1428static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1429{
24ac23ab
TM		 1430 struct nfs4_opendata *data = calldata;
1431 struct nfs4_state_owner *sp = data->owner;
5138fde0 1432
24ac23ab
TM		 1433 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1434 return;
aac00a8d
TM		 1435 /*
1436 * Check if we still need to send an OPEN call, or if we can use
1437 * a delegation instead.
1438 */
1439 if (data->state != NULL) {
1440 struct nfs_delegation *delegation;
1441
dc0b027d 1442 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1443 goto out_no_action;
aac00a8d
TM		 1444 rcu_read_lock();
1445 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1446 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1447 can_open_delegated(delegation, data->o_arg.fmode))
1448 goto unlock_no_action;
aac00a8d
TM		 1449 rcu_read_unlock();
1450 }
95b72eb0 1451 /* Update client id. */
1f0e890d 1452 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1453 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1454 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1455 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1456 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1457 }
26e976a8 1458 data->timestamp = jiffies;
035168ab 1459 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1460 &data->o_arg.seq_args,
2240a9e2
TM		 1461 &data->o_res.seq_res,
1462 task) != 0)
1463 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1464 return;
652f89f6
TM		 1465unlock_no_action:
1466 rcu_read_unlock();
6ee41268
TM		 1467out_no_action:
1468 task->tk_action = NULL;
b75ad4cd 1469 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1470}
1471
24ac23ab
TM		 1472static void nfs4_open_done(struct rpc_task *task, void *calldata)
1473{
1474 struct nfs4_opendata *data = calldata;
1da177e4 1475
24ac23ab 1476 data->rpc_status = task->tk_status;
d898528c 1477
14516c3a
TM		 1478 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1479 return;
d898528c 1480
24ac23ab 1481 if (task->tk_status == 0) {
807d66d8
TM		 1482 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1483 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1484 case S_IFREG:
1485 break;
1486 case S_IFLNK:
24ac23ab 1487 data->rpc_status = -ELOOP;
6f926b5b
TM		 1488 break;
1489 case S_IFDIR:
24ac23ab 1490 data->rpc_status = -EISDIR;
6f926b5b
TM		 1491 break;
1492 default:
24ac23ab 1493 data->rpc_status = -ENOTDIR;
807d66d8 1494 }
6f926b5b 1495 }
26e976a8 1496 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1497 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1498 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1499 }
3e309914 1500 data->rpc_done = 1;
24ac23ab 1501}
6f926b5b 1502
24ac23ab
TM		 1503static void nfs4_open_release(void *calldata)
1504{
1505 struct nfs4_opendata *data = calldata;
1506 struct nfs4_state *state = NULL;
1507
1508 /* If this request hasn't been cancelled, do nothing */
1509 if (data->cancelled == 0)
1510 goto out_free;
1511 /* In case of error, no cleanup! */
3e309914 1512 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1513 goto out_free;
1514 /* In case we need an open_confirm, no cleanup! */
1515 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1516 goto out_free;
24ac23ab 1517 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1518 if (!IS_ERR(state))
643168c2 1519 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1520out_free:
c6d00e63 1521 nfs4_opendata_put(data);
24ac23ab
TM		 1522}
1523
1524static const struct rpc_call_ops nfs4_open_ops = {
1525 .rpc_call_prepare = nfs4_open_prepare,
1526 .rpc_call_done = nfs4_open_done,
1527 .rpc_release = nfs4_open_release,
1528};
1529
b257957e 1530static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1531{
1532 struct inode *dir = data->dir->d_inode;
1533 struct nfs_server *server = NFS_SERVER(dir);
1534 struct nfs_openargs *o_arg = &data->o_arg;
1535 struct nfs_openres *o_res = &data->o_res;
1536 struct rpc_task *task;
5138fde0
TM		 1537 struct rpc_message msg = {
1538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1539 .rpc_argp = o_arg,
1540 .rpc_resp = o_res,
1541 .rpc_cred = data->owner->so_cred,
1542 };
c970aa85
TM		 1543 struct rpc_task_setup task_setup_data = {
1544 .rpc_client = server->client,
5138fde0 1545 .rpc_message = &msg,
c970aa85
TM		 1546 .callback_ops = &nfs4_open_ops,
1547 .callback_data = data,
101070ca 1548 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1549 .flags = RPC_TASK_ASYNC,
1550 };
24ac23ab
TM		 1551 int status;
1552
9d12b216 1553 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1554 kref_get(&data->kref);
3e309914
TM		 1555 data->rpc_done = 0;
1556 data->rpc_status = 0;
2ced46c2 1557 data->cancelled = 0;
b257957e 1558 if (isrecover)
8fe72bac 1559 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1560 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1561 if (IS_ERR(task))
1562 return PTR_ERR(task);
1563 status = nfs4_wait_for_completion_rpc_task(task);
1564 if (status != 0) {
1565 data->cancelled = 1;
1566 smp_wmb();
1567 } else
1568 status = data->rpc_status;
1569 rpc_put_task(task);
1570
1571 return status;
1572}
1573
1574static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1575{
1576 struct inode *dir = data->dir->d_inode;
1577 struct nfs_openres *o_res = &data->o_res;
1578 int status;
1579
1580 status = nfs4_run_open_task(data, 1);
1581 if (status != 0 || !data->rpc_done)
1582 return status;
1583
6926afd1
TM		 1584 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1585
b257957e
AB		 1586 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1587 status = _nfs4_proc_open_confirm(data);
1588 if (status != 0)
1589 return status;
1590 }
1591
1592 return status;
1593}
1594
6168f62c
WAA		 1595static int nfs4_opendata_access(struct rpc_cred *cred,
1596 struct nfs4_opendata *opendata,
1597 struct nfs4_state *state, fmode_t fmode)
1598{
1599 struct nfs_access_entry cache;
1600 u32 mask;
1601
1602 /* access call failed or for some reason the server doesn't
1603 * support any access modes -- defer access call until later */
1604 if (opendata->o_res.access_supported == 0)
1605 return 0;
1606
1607 mask = 0;
bbd3a8ee
WAA		 1608 /* don't check MAY_WRITE - a newly created file may not have
1609 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1610 if (fmode & FMODE_READ)
1611 mask |= MAY_READ;
6168f62c
WAA		 1612 if (fmode & FMODE_EXEC)
1613 mask |= MAY_EXEC;
1614
1615 cache.cred = cred;
1616 cache.jiffies = jiffies;
1617 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1618 nfs_access_add_cache(state->inode, &cache);
1619
bbd3a8ee 1620 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1621 return 0;
1622
1623 /* even though OPEN succeeded, access is denied. Close the file */
1624 nfs4_close_state(state, fmode);
998f40b5 1625 return -EACCES;
6168f62c
WAA		 1626}
1627
b257957e
AB		 1628/*
1629 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1630 */
1631static int _nfs4_proc_open(struct nfs4_opendata *data)
1632{
1633 struct inode *dir = data->dir->d_inode;
1634 struct nfs_server *server = NFS_SERVER(dir);
1635 struct nfs_openargs *o_arg = &data->o_arg;
1636 struct nfs_openres *o_res = &data->o_res;
1637 int status;
1638
1639 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1640 if (!data->rpc_done)
1641 return status;
1642 if (status != 0) {
1643 if (status == -NFS4ERR_BADNAME &&
1644 !(o_arg->open_flags & O_CREAT))
1645 return -ENOENT;
24ac23ab 1646 return status;
08ef7bd3 1647 }
24ac23ab 1648
6926afd1
TM		 1649 nfs_fattr_map_and_free_names(server, &data->f_attr);
1650
90ff0c54 1651 if (o_arg->open_flags & O_CREAT)
56ae19f3 1652 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1653 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1654 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1655 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1656 status = _nfs4_proc_open_confirm(data);
1da177e4 1657 if (status != 0)
24ac23ab 1658 return status;
1da177e4
LT		 1659 }
1660 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1661 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1662 return 0;
1da177e4
LT		 1663}
1664
d83217c1
AA		 1665static int nfs4_recover_expired_lease(struct nfs_server *server)
1666{
1667 return nfs4_client_recover_expired_lease(server->nfs_client);
1668}
1669
1da177e4
LT		 1670/*
1671 * OPEN_EXPIRED:
1672 * reclaim state on the server after a network partition.
1673 * Assumes caller holds the appropriate lock
1674 */
539cd03a 1675static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1676{
e56e0b78 1677 struct nfs4_opendata *opendata;
864472e9 1678 int ret;
1da177e4 1679
6f220ed5
TM		 1680 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1681 if (IS_ERR(opendata))
1682 return PTR_ERR(opendata);
864472e9 1683 ret = nfs4_open_recover(opendata, state);
35d05778 1684 if (ret == -ESTALE)
3d4ff43d 1685 d_drop(ctx->dentry);
c6d00e63 1686 nfs4_opendata_put(opendata);
864472e9 1687 return ret;
1da177e4
LT		 1688}
1689
a9ed2e25 1690static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1691{
539cd03a 1692 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1693 struct nfs4_exception exception = { };
1694 int err;
1695
1696 do {
539cd03a 1697 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1698 switch (err) {
1699 default:
1700 goto out;
1701 case -NFS4ERR_GRACE:
1702 case -NFS4ERR_DELAY:
1703 nfs4_handle_exception(server, err, &exception);
1704 err = 0;
1705 }
202b50dc 1706 } while (exception.retry);
a9ed2e25 1707out:
202b50dc
TM		 1708 return err;
1709}
1710
1da177e4
LT		 1711static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1712{
1da177e4 1713 struct nfs_open_context *ctx;
864472e9 1714 int ret;
1da177e4 1715
864472e9
TM		 1716 ctx = nfs4_state_find_open_context(state);
1717 if (IS_ERR(ctx))
1718 return PTR_ERR(ctx);
539cd03a 1719 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1720 put_nfs_open_context(ctx);
1721 return ret;
1da177e4
LT		 1722}
1723
f062eb6c 1724#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1725static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1726{
f062eb6c 1727 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1728 nfs4_stateid *stateid = &state->stateid;
1729 int status;
1730
1731 /* If a state reset has been done, test_stateid is unneeded */
1732 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1733 return;
1734
1735 status = nfs41_test_stateid(server, stateid);
1736 if (status != NFS_OK) {
1737 /* Free the stateid unless the server explicitly
1738 * informs us the stateid is unrecognized. */
1739 if (status != -NFS4ERR_BAD_STATEID)
1740 nfs41_free_stateid(server, stateid);
6938867e 1741 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1742
6938867e
BS		 1743 write_seqlock(&state->seqlock);
1744 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1745 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1746 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1747 }
1748}
1749
1750/**
1751 * nfs41_check_open_stateid - possibly free an open stateid
1752 *
1753 * @state: NFSv4 state for an inode
1754 *
1755 * Returns NFS_OK if recovery for this stateid is now finished.
1756 * Otherwise a negative NFS4ERR value is returned.
1757 */
1758static int nfs41_check_open_stateid(struct nfs4_state *state)
1759{
1760 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1761 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1762 int status;
1763
1764 /* If a state reset has been done, test_stateid is unneeded */
1765 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1766 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1767 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1768 return -NFS4ERR_BAD_STATEID;
1769
1770 status = nfs41_test_stateid(server, stateid);
1771 if (status != NFS_OK) {
1772 /* Free the stateid unless the server explicitly
1773 * informs us the stateid is unrecognized. */
1774 if (status != -NFS4ERR_BAD_STATEID)
1775 nfs41_free_stateid(server, stateid);
1776
1777 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1780 }
1781 return status;
1782}
1783
1784static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1785{
eb64cf96 1786 int status;
b01dd1d8 1787
3e60ffdd
CL		 1788 nfs41_clear_delegation_stateid(state);
1789 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1790 if (status != NFS_OK)
1791 status = nfs4_open_expired(sp, state);
1792 return status;
f062eb6c
BS		 1793}
1794#endif
1795
aa53ed54
JL		 1796/*
1797 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1798 * fields corresponding to attributes that were used to store the verifier.
1799 * Make sure we clobber those fields in the later setattr call
1800 */
1801static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1802{
1803 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1804 !(sattr->ia_valid & ATTR_ATIME_SET))
1805 sattr->ia_valid |= ATTR_ATIME;
1806
1807 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1808 !(sattr->ia_valid & ATTR_MTIME_SET))
1809 sattr->ia_valid |= ATTR_MTIME;
1810}
1811
1da177e4 1812/*
24ac23ab 1813 * Returns a referenced nfs4_state
1da177e4 1814 */
82be417a
AA		 1815static int _nfs4_do_open(struct inode *dir,
1816 struct dentry *dentry,
1817 fmode_t fmode,
1818 int flags,
1819 struct iattr *sattr,
1820 struct rpc_cred *cred,
1821 struct nfs4_state **res,
1822 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1823{
1824 struct nfs4_state_owner *sp;
1825 struct nfs4_state *state = NULL;
1826 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1827 struct nfs4_opendata *opendata;
aac00a8d 1828 int status;
1da177e4
LT		 1829
1830 /* Protect against reboot recovery conflicts */
1da177e4 1831 status = -ENOMEM;
d1e284d5
TM		 1832 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1833 if (sp == NULL) {
1da177e4
LT		 1834 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1835 goto out_err;
1836 }
58d9714a
TM		 1837 status = nfs4_recover_expired_lease(server);
1838 if (status != 0)
b4454fe1 1839 goto err_put_state_owner;
82a2c1b7
AV		 1840 if (dentry->d_inode != NULL)
1841 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1842 status = -ENOMEM;
82a2c1b7 1843 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1844 if (opendata == NULL)
95d35cb4 1845 goto err_put_state_owner;
1da177e4 1846
82be417a
AA		 1847 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1848 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1849 if (!opendata->f_attr.mdsthreshold)
1850 goto err_opendata_put;
1549210f 1851 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1852 }
82a2c1b7
AV		 1853 if (dentry->d_inode != NULL)
1854 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1855
24ac23ab 1856 status = _nfs4_proc_open(opendata);
1da177e4 1857 if (status != 0)
c6d00e63 1858 goto err_opendata_put;
1da177e4 1859
24ac23ab 1860 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1861 status = PTR_ERR(state);
1862 if (IS_ERR(state))
c6d00e63 1863 goto err_opendata_put;
0df5dd4a 1864 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1865 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1866
6168f62c
WAA		 1867 status = nfs4_opendata_access(cred, opendata, state, fmode);
1868 if (status != 0)
1869 goto err_opendata_put;
1870
0ab64e0e
TM		 1871 if (opendata->o_arg.open_flags & O_EXCL) {
1872 nfs4_exclusive_attrset(opendata, sattr);
1873
1874 nfs_fattr_init(opendata->o_res.f_attr);
1875 status = nfs4_do_setattr(state->inode, cred,
1876 opendata->o_res.f_attr, sattr,
1877 state);
1878 if (status == 0)
1879 nfs_setattr_update_inode(state->inode, sattr);
1880 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1881 }
82be417a
AA		 1882
1883 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1884 *ctx_th = opendata->f_attr.mdsthreshold;
1885 else
1886 kfree(opendata->f_attr.mdsthreshold);
1887 opendata->f_attr.mdsthreshold = NULL;
1888
c6d00e63 1889 nfs4_opendata_put(opendata);
1da177e4 1890 nfs4_put_state_owner(sp);
1da177e4
LT		 1891 *res = state;
1892 return 0;
c6d00e63 1893err_opendata_put:
82be417a 1894 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1895 nfs4_opendata_put(opendata);
e56e0b78
TM		 1896err_put_state_owner:
1897 nfs4_put_state_owner(sp);
1da177e4 1898out_err:
1da177e4
LT		 1899 *res = NULL;
1900 return status;
1901}
1902
1903
82be417a
AA		 1904static struct nfs4_state *nfs4_do_open(struct inode *dir,
1905 struct dentry *dentry,
1906 fmode_t fmode,
1907 int flags,
1908 struct iattr *sattr,
1909 struct rpc_cred *cred,
1910 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1911{
1912 struct nfs4_exception exception = { };
1913 struct nfs4_state *res;
1914 int status;
1915
6168f62c 1916 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1917 do {
82be417a
AA		 1918 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1919 &res, ctx_th);
1da177e4
LT		 1920 if (status == 0)
1921 break;
1922 /* NOTE: BAD_SEQID means the server and client disagree about the
1923 * book-keeping w.r.t. state-changing operations
1924 * (OPEN/CLOSE/LOCK/LOCKU...)
1925 * It is actually a sign of a bug on the client or on the server.
1926 *
1927 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1928 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1929 * have unhashed the old state_owner for us, and that we can
1930 * therefore safely retry using a new one. We should still warn
1931 * the user though...
1932 */
1933 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1934 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1935 " returned a bad sequence-id error!\n",
1936 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1937 exception.retry = 1;
1938 continue;
1939 }
550f5747
TM		 1940 /*
1941 * BAD_STATEID on OPEN means that the server cancelled our
1942 * state before it received the OPEN_CONFIRM.
1943 * Recover by retrying the request as per the discussion
1944 * on Page 181 of RFC3530.
1945 */
1946 if (status == -NFS4ERR_BAD_STATEID) {
1947 exception.retry = 1;
1948 continue;
1949 }
aac00a8d
TM		 1950 if (status == -EAGAIN) {
1951 /* We must have found a delegation */
1952 exception.retry = 1;
1953 continue;
1954 }
1da177e4
LT		 1955 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1956 status, &exception));
1957 } while (exception.retry);
1958 return res;
1959}
1960
659bfcd6
TM		 1961static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1962 struct nfs_fattr *fattr, struct iattr *sattr,
1963 struct nfs4_state *state)
1da177e4 1964{
3e4f6290 1965 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1966 struct nfs_setattrargs arg = {
3e4f6290 1967 .fh = NFS_FH(inode),
1da177e4
LT		 1968 .iap = sattr,
1969 .server = server,
1970 .bitmask = server->attr_bitmask,
1971 };
1972 struct nfs_setattrres res = {
1973 .fattr = fattr,
1974 .server = server,
1975 };
1976 struct rpc_message msg = {
659bfcd6
TM		 1977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1978 .rpc_argp = &arg,
1979 .rpc_resp = &res,
1980 .rpc_cred = cred,
1da177e4 1981 };
26e976a8 1982 unsigned long timestamp = jiffies;
65e4308d 1983 int status;
1da177e4 1984
0e574af1 1985 nfs_fattr_init(fattr);
1da177e4 1986
4fc8796d 1987 if (state != NULL) {
2a369153
TM		 1988 struct nfs_lockowner lockowner = {
1989 .l_owner = current->files,
1990 .l_pid = current->tgid,
1991 };
4fc8796d 1992 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 1993 &lockowner);
4fc8796d
TM		 1994 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1995 FMODE_WRITE)) {
3e4f6290 1996 /* Use that stateid */
08e9eac4 1997 } else
f597c537 1998 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1999
7c513058 2000 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2001 if (status == 0 && state != NULL)
2002 renew_lease(server, timestamp);
65e4308d 2003 return status;
1da177e4
LT		 2004}
2005
659bfcd6
TM		 2006static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2007 struct nfs_fattr *fattr, struct iattr *sattr,
2008 struct nfs4_state *state)
1da177e4 2009{
3e4f6290 2010 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2011 struct nfs4_exception exception = {
2012 .state = state,
3114ea7a 2013 .inode = inode,
a1d0b5ee 2014 };
1da177e4
LT		 2015 int err;
2016 do {
451146be
TM		 2017 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2018 switch (err) {
2019 case -NFS4ERR_OPENMODE:
2020 if (state && !(state->state & FMODE_WRITE)) {
2021 err = -EBADF;
2022 if (sattr->ia_valid & ATTR_OPEN)
2023 err = -EACCES;
2024 goto out;
2025 }
2026 }
2027 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2028 } while (exception.retry);
451146be 2029out:
1da177e4
LT		 2030 return err;
2031}
2032
2033struct nfs4_closedata {
2034 struct inode *inode;
2035 struct nfs4_state *state;
2036 struct nfs_closeargs arg;
2037 struct nfs_closeres res;
516a6af6 2038 struct nfs_fattr fattr;
26e976a8 2039 unsigned long timestamp;
f7e8917a
FI		 2040 bool roc;
2041 u32 roc_barrier;
1da177e4
LT		 2042};
2043
963d8fe5 2044static void nfs4_free_closedata(void *data)
9512135d 2045{
963d8fe5
TM		 2046 struct nfs4_closedata *calldata = data;
2047 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2048 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2049
f7e8917a
FI		 2050 if (calldata->roc)
2051 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2052 nfs4_put_open_state(calldata->state);
2053 nfs_free_seqid(calldata->arg.seqid);
9512135d 2054 nfs4_put_state_owner(sp);
324d003b 2055 nfs_sb_deactive_async(sb);
9512135d
TM		 2056 kfree(calldata);
2057}
2058
88069f77
TM		 2059static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2060 fmode_t fmode)
2061{
2062 spin_lock(&state->owner->so_lock);
2063 if (!(fmode & FMODE_READ))
2064 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2065 if (!(fmode & FMODE_WRITE))
2066 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2067 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2068 spin_unlock(&state->owner->so_lock);
2069}
2070
963d8fe5 2071static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2072{
963d8fe5 2073 struct nfs4_closedata *calldata = data;
1da177e4 2074 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2075 struct nfs_server *server = NFS_SERVER(calldata->inode);
2076
a3ca5651 2077 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2078 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2079 return;
1da177e4
LT		 2080 /* hmm. we are done with the inode, and in the process of freeing
2081 * the state_owner. we keep this around to process errors
2082 */
1da177e4
LT		 2083 switch (task->tk_status) {
2084 case 0:
f7e8917a
FI		 2085 if (calldata->roc)
2086 pnfs_roc_set_barrier(state->inode,
2087 calldata->roc_barrier);
45328c35 2088 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2089 renew_lease(server, calldata->timestamp);
88069f77
TM		 2090 nfs4_close_clear_stateid_flags(state,
2091 calldata->arg.fmode);
1da177e4
LT		 2092 break;
2093 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2094 case -NFS4ERR_OLD_STATEID:
2095 case -NFS4ERR_BAD_STATEID:
1da177e4 2096 case -NFS4ERR_EXPIRED:
dc0b027d 2097 if (calldata->arg.fmode == 0)
9e33bed5 2098 break;
1da177e4 2099 default:
72211dbe
TM		 2100 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2101 rpc_restart_call_prepare(task);
1da177e4 2102 }
72211dbe 2103 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2104 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2105 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2106}
2107
4ce70ada 2108static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2109{
4ce70ada 2110 struct nfs4_closedata *calldata = data;
9512135d 2111 struct nfs4_state *state = calldata->state;
7fdab069 2112 struct inode *inode = calldata->inode;
88069f77 2113 int call_close = 0;
9512135d 2114
a3ca5651 2115 dprintk("%s: begin!\n", __func__);
963d8fe5 2116 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2117 return;
003707c7 2118
88069f77
TM		 2119 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2120 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2121 spin_lock(&state->owner->so_lock);
003707c7 2122 /* Calculate the change in open mode */
e7616923 2123 if (state->n_rdwr == 0) {
003707c7 2124 if (state->n_rdonly == 0) {
88069f77
TM		 2125 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2126 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2127 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2128 }
2129 if (state->n_wronly == 0) {
88069f77
TM		 2130 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2131 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2132 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2133 }
e7616923 2134 }
4cecb76f 2135 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2136
2137 if (!call_close) {
963d8fe5
TM		 2138 /* Note: exit _without_ calling nfs4_close_done */
2139 task->tk_action = NULL;
b75ad4cd 2140 nfs4_sequence_done(task, &calldata->res.seq_res);
a3ca5651 2141 goto out;
9512135d 2142 }
88069f77 2143
f7e8917a 2144 if (calldata->arg.fmode == 0) {
88069f77 2145 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2146 if (calldata->roc &&
7fdab069 2147 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2148 goto out;
f7e8917a 2149 }
88069f77 2150
516a6af6 2151 nfs_fattr_init(calldata->res.fattr);
26e976a8 2152 calldata->timestamp = jiffies;
7fdab069 2153 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2154 &calldata->arg.seq_args,
2155 &calldata->res.seq_res,
2240a9e2
TM		 2156 task) != 0)
2157 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2158out:
2159 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2160}
2161
963d8fe5 2162static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2163 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2164 .rpc_call_done = nfs4_close_done,
2165 .rpc_release = nfs4_free_closedata,
2166};
2167
1da177e4
LT		 2168/*
2169 * It is possible for data to be read/written from a mem-mapped file
2170 * after the sys_close call (which hits the vfs layer as a flush).
2171 * This means that we can't safely call nfsv4 close on a file until
2172 * the inode is cleared. This in turn means that we are not good
2173 * NFSv4 citizens - we do not indicate to the server to update the file's
2174 * share state even when we are done with one of the three share
2175 * stateid's in the inode.
2176 *
2177 * NOTE: Caller must be holding the sp->so_owner semaphore!
2178 */
1f7977c1 2179int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2180{
4a35bd41 2181 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2182 struct nfs4_closedata *calldata;
b39e625b
TM		 2183 struct nfs4_state_owner *sp = state->owner;
2184 struct rpc_task *task;
5138fde0
TM		 2185 struct rpc_message msg = {
2186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2187 .rpc_cred = state->owner->so_cred,
2188 };
c970aa85
TM		 2189 struct rpc_task_setup task_setup_data = {
2190 .rpc_client = server->client,
5138fde0 2191 .rpc_message = &msg,
c970aa85 2192 .callback_ops = &nfs4_close_ops,
101070ca 2193 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2194 .flags = RPC_TASK_ASYNC,
2195 };
9512135d 2196 int status = -ENOMEM;
1da177e4 2197
8535b2be 2198 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2199 if (calldata == NULL)
9512135d 2200 goto out;
9d12b216 2201 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2202 calldata->inode = state->inode;
1da177e4 2203 calldata->state = state;
4a35bd41 2204 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2205 calldata->arg.stateid = &state->open_stateid;
1da177e4 2206 /* Serialization for the sequence id */
8535b2be 2207 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2208 if (calldata->arg.seqid == NULL)
2209 goto out_free_calldata;
dc0b027d 2210 calldata->arg.fmode = 0;
a65318bf 2211 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2212 calldata->res.fattr = &calldata->fattr;
c1d51931 2213 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2214 calldata->res.server = server;
1f7977c1 2215 calldata->roc = pnfs_roc(state->inode);
643168c2 2216 nfs_sb_active(calldata->inode->i_sb);
9512135d 2217
1174dd1f
TM		 2218 msg.rpc_argp = &calldata->arg;
2219 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2220 task_setup_data.callback_data = calldata;
2221 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2222 if (IS_ERR(task))
2223 return PTR_ERR(task);
a49c3c77
TM		 2224 status = 0;
2225 if (wait)
2226 status = rpc_wait_for_completion_task(task);
b39e625b 2227 rpc_put_task(task);
a49c3c77 2228 return status;
9512135d
TM		 2229out_free_calldata:
2230 kfree(calldata);
2231out:
b39e625b
TM		 2232 nfs4_put_open_state(state);
2233 nfs4_put_state_owner(sp);
9512135d 2234 return status;
1da177e4
LT		 2235}
2236
2b484297 2237static struct inode *
cd9a1c0e 2238nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2239{
1da177e4 2240 struct nfs4_state *state;
1da177e4 2241
565277f6 2242 /* Protect against concurrent sillydeletes */
82be417a
AA		 2243 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2244 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2245 if (IS_ERR(state))
2246 return ERR_CAST(state);
cd9a1c0e 2247 ctx->state = state;
f46e0bd3 2248 return igrab(state->inode);
1da177e4
LT		 2249}
2250
1185a552 2251static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2252{
2253 if (ctx->state == NULL)
2254 return;
2255 if (is_sync)
643168c2 2256 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2257 else
643168c2 2258 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2259}
1da177e4
LT		 2260
2261static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2262{
43652ad5
BH		 2263 struct nfs4_server_caps_arg args = {
2264 .fhandle = fhandle,
2265 };
1da177e4
LT		 2266 struct nfs4_server_caps_res res = {};
2267 struct rpc_message msg = {
2268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2269 .rpc_argp = &args,
1da177e4
LT		 2270 .rpc_resp = &res,
2271 };
2272 int status;
2273
7c513058 2274 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2275 if (status == 0) {
2276 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2277 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2278 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2279 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2280 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2281 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2282 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2283 server->caps |= NFS_CAP_ACLS;
2284 if (res.has_links != 0)
2285 server->caps |= NFS_CAP_HARDLINKS;
2286 if (res.has_symlinks != 0)
2287 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2288 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2289 server->caps |= NFS_CAP_FILEID;
2290 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2291 server->caps |= NFS_CAP_MODE;
2292 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2293 server->caps |= NFS_CAP_NLINK;
2294 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2295 server->caps |= NFS_CAP_OWNER;
2296 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2297 server->caps |= NFS_CAP_OWNER_GROUP;
2298 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2299 server->caps |= NFS_CAP_ATIME;
2300 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2301 server->caps |= NFS_CAP_CTIME;
2302 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2303 server->caps |= NFS_CAP_MTIME;
2304
a65318bf
TM		 2305 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2306 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2307 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2308 server->acl_bitmask = res.acl_bitmask;
264e6351 2309 server->fh_expire_type = res.fh_expire_type;
1da177e4 2310 }
cccef3b9 2311
1da177e4
LT		 2312 return status;
2313}
2314
55a97593 2315int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2316{
2317 struct nfs4_exception exception = { };
2318 int err;
2319 do {
2320 err = nfs4_handle_exception(server,
2321 _nfs4_server_capabilities(server, fhandle),
2322 &exception);
2323 } while (exception.retry);
2324 return err;
2325}
2326
2327static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2328 struct nfs_fsinfo *info)
2329{
1da177e4
LT		 2330 struct nfs4_lookup_root_arg args = {
2331 .bitmask = nfs4_fattr_bitmap,
2332 };
2333 struct nfs4_lookup_res res = {
2334 .server = server,
0e574af1 2335 .fattr = info->fattr,
1da177e4
LT		 2336 .fh = fhandle,
2337 };
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2340 .rpc_argp = &args,
2341 .rpc_resp = &res,
2342 };
008f55d0 2343
0e574af1 2344 nfs_fattr_init(info->fattr);
7c513058 2345 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2346}
2347
2348static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *info)
2350{
2351 struct nfs4_exception exception = { };
2352 int err;
2353 do {
fb8a5ba8
BS		 2354 err = _nfs4_lookup_root(server, fhandle, info);
2355 switch (err) {
2356 case 0:
2357 case -NFS4ERR_WRONGSEC:
05e9cfb4 2358 goto out;
fb8a5ba8
BS		 2359 default:
2360 err = nfs4_handle_exception(server, err, &exception);
2361 }
1da177e4 2362 } while (exception.retry);
05e9cfb4 2363out:
1da177e4
LT		 2364 return err;
2365}
2366
8f70e95f
BS		 2367static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2368 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2369{
2370 struct rpc_auth *auth;
2371 int ret;
2372
2373 auth = rpcauth_create(flavor, server->client);
e8d920c5 2374 if (IS_ERR(auth)) {
8f70e95f
BS		 2375 ret = -EIO;
2376 goto out;
2377 }
2378 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2379out:
2380 return ret;
2381}
2382
801a16dc 2383static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2384 struct nfs_fsinfo *info)
1da177e4 2385{
8f70e95f 2386 int i, len, status = 0;
0fabee24 2387 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2388
6a1a1e34 2389 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2390 if (len < 0)
2391 return len;
8f70e95f
BS		 2392
2393 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2394 /* AUTH_UNIX is the default flavor if none was specified,
2395 * thus has already been tried. */
2396 if (flav_array[i] == RPC_AUTH_UNIX)
2397 continue;
2398
8f70e95f 2399 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2400 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2401 continue;
2402 break;
8f70e95f 2403 }
fb8a5ba8
BS		 2404 /*
2405 * -EACCESS could mean that the user doesn't have correct permissions
2406 * to access the mount. It could also mean that we tried to mount
2407 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2408 * existing mount programs don't handle -EACCES very well so it should
2409 * be mapped to -EPERM instead.
2410 */
2411 if (status == -EACCES)
2412 status = -EPERM;
801a16dc
BS		 2413 return status;
2414}
2415
2416/*
2417 * get the file handle for the "/" directory on the server
2418 */
3028eb2b
BS		 2419int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2420 struct nfs_fsinfo *info)
801a16dc 2421{
fca78d6d 2422 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2423 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2424 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2425 /*
2426 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2427 * by nfs4_map_errors() as this function exits.
2428 */
fca78d6d 2429 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2430 if (status == 0)
2431 status = nfs4_server_capabilities(server, fhandle);
2432 if (status == 0)
2433 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2434 return nfs4_map_errors(status);
1da177e4
LT		 2435}
2436
bae36241
BS		 2437static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2438 struct nfs_fsinfo *info)
2439{
2440 int error;
2441 struct nfs_fattr *fattr = info->fattr;
2442
2443 error = nfs4_server_capabilities(server, mntfh);
2444 if (error < 0) {
2445 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2446 return error;
2447 }
2448
2449 error = nfs4_proc_getattr(server, mntfh, fattr);
2450 if (error < 0) {
2451 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2452 return error;
2453 }
2454
2455 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2456 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2457 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2458
2459 return error;
2460}
2461
6b97fd3d
MN		 2462/*
2463 * Get locations and (maybe) other attributes of a referral.
2464 * Note that we'll actually follow the referral later when
2465 * we detect fsid mismatch in inode revalidation
2466 */
f05d147f
BS		 2467static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2468 const struct qstr *name, struct nfs_fattr *fattr,
2469 struct nfs_fh *fhandle)
6b97fd3d
MN		 2470{
2471 int status = -ENOMEM;
2472 struct page *page = NULL;
2473 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2474
2475 page = alloc_page(GFP_KERNEL);
2476 if (page == NULL)
2477 goto out;
2478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2479 if (locations == NULL)
2480 goto out;
2481
f05d147f 2482 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2483 if (status != 0)
2484 goto out;
2485 /* Make sure server returned a different fsid for the referral */
2486 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2487 dprintk("%s: server did not return a different fsid for"
2488 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2489 status = -EIO;
2490 goto out;
2491 }
533eb461
AA		 2492 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2493 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2494
533eb461 2495 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2496 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2497 memset(fhandle, 0, sizeof(struct nfs_fh));
2498out:
2499 if (page)
2500 __free_page(page);
5d7ca35a 2501 kfree(locations);
6b97fd3d
MN		 2502 return status;
2503}
2504
1da177e4
LT		 2505static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2506{
2507 struct nfs4_getattr_arg args = {
2508 .fh = fhandle,
2509 .bitmask = server->attr_bitmask,
2510 };
2511 struct nfs4_getattr_res res = {
2512 .fattr = fattr,
2513 .server = server,
2514 };
2515 struct rpc_message msg = {
2516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2517 .rpc_argp = &args,
2518 .rpc_resp = &res,
2519 };
2520
0e574af1 2521 nfs_fattr_init(fattr);
7c513058 2522 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2523}
2524
2525static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2526{
2527 struct nfs4_exception exception = { };
2528 int err;
2529 do {
2530 err = nfs4_handle_exception(server,
2531 _nfs4_proc_getattr(server, fhandle, fattr),
2532 &exception);
2533 } while (exception.retry);
2534 return err;
2535}
2536
2537/*
2538 * The file is not closed if it is opened due to the a request to change
2539 * the size of the file. The open call will not be needed once the
2540 * VFS layer lookup-intents are implemented.
2541 *
2542 * Close is called when the inode is destroyed.
2543 * If we haven't opened the file for O_WRONLY, we
2544 * need to in the size_change case to obtain a stateid.
2545 *
2546 * Got race?
2547 * Because OPEN is always done by name in nfsv4, it is
2548 * possible that we opened a different file by the same
2549 * name. We can recognize this race condition, but we
2550 * can't do anything about it besides returning an error.
2551 *
2552 * This will be fixed with VFS changes (lookup-intent).
2553 */
2554static int
2555nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2556 struct iattr *sattr)
2557{
08e9eac4 2558 struct inode *inode = dentry->d_inode;
659bfcd6 2559 struct rpc_cred *cred = NULL;
d530838b 2560 struct nfs4_state *state = NULL;
1da177e4
LT		 2561 int status;
2562
8a1636c4
BH		 2563 if (pnfs_ld_layoutret_on_setattr(inode))
2564 pnfs_return_layout(inode);
2565
0e574af1 2566 nfs_fattr_init(fattr);
1da177e4 2567
2669940d
AA		 2568 /* Deal with open(O_TRUNC) */
2569 if (sattr->ia_valid & ATTR_OPEN)
2570 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2571
2572 /* Optimization: if the end result is no change, don't RPC */
2573 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2574 return 0;
2575
d530838b 2576 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2577 if (sattr->ia_valid & ATTR_FILE) {
2578 struct nfs_open_context *ctx;
2579
2580 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2581 if (ctx) {
2582 cred = ctx->cred;
2583 state = ctx->state;
2584 }
659bfcd6 2585 }
08e9eac4 2586
659bfcd6 2587 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2588 if (status == 0)
2589 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2590 return status;
2591}
2592
0c2e53f1
TM		 2593static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2594 const struct qstr *name, struct nfs_fh *fhandle,
2595 struct nfs_fattr *fattr)
2b3de441 2596{
0c2e53f1 2597 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2598 int status;
2599 struct nfs4_lookup_arg args = {
2600 .bitmask = server->attr_bitmask,
0c2e53f1 2601 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2602 .name = name,
2603 };
2604 struct nfs4_lookup_res res = {
2605 .server = server,
2606 .fattr = fattr,
2607 .fh = fhandle,
2608 };
2609 struct rpc_message msg = {
2610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2611 .rpc_argp = &args,
2612 .rpc_resp = &res,
2613 };
2614
2615 nfs_fattr_init(fattr);
2616
1da177e4 2617 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2618 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2619 dprintk("NFS reply lookup: %d\n", status);
2620 return status;
2621}
2622
72de53ec 2623static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2624{
7ebb9315 2625 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2626 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2627 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2628 fattr->nlink = 2;
2629}
2630
72de53ec
BS		 2631static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2632 struct qstr *name, struct nfs_fh *fhandle,
2633 struct nfs_fattr *fattr)
1da177e4
LT		 2634{
2635 struct nfs4_exception exception = { };
72de53ec 2636 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2637 int err;
2638 do {
72de53ec
BS		 2639 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2640 switch (err) {
08ef7bd3 2641 case -NFS4ERR_BADNAME:
72de53ec
BS		 2642 err = -ENOENT;
2643 goto out;
0c2e53f1 2644 case -NFS4ERR_MOVED:
f05d147f 2645 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2646 goto out;
0c2e53f1 2647 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2648 err = -EPERM;
2649 if (client != *clnt)
2650 goto out;
2651
2652 client = nfs4_create_sec_client(client, dir, name);
2653 if (IS_ERR(client))
2654 return PTR_ERR(client);
2655
2656 exception.retry = 1;
2657 break;
2658 default:
2659 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2660 }
1da177e4 2661 } while (exception.retry);
72de53ec
BS		 2662
2663out:
2664 if (err == 0)
2665 *clnt = client;
2666 else if (client != *clnt)
2667 rpc_shutdown_client(client);
2668
1da177e4
LT		 2669 return err;
2670}
2671
80a16b21 2672static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2673 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2674{
2675 int status;
2676 struct rpc_clnt *client = NFS_CLIENT(dir);
2677
2678 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2679 if (client != NFS_CLIENT(dir)) {
2680 rpc_shutdown_client(client);
2681 nfs_fixup_secinfo_attributes(fattr);
2682 }
2683 return status;
2684}
2685
f05d147f
BS		 2686struct rpc_clnt *
2687nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2688 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2689{
2690 int status;
2691 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2692
2693 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2694 if (status < 0) {
2695 rpc_shutdown_client(client);
2696 return ERR_PTR(status);
2697 }
2698 return client;
2699}
2700
1da177e4
LT		 2701static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2702{
76b32999 2703 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2704 struct nfs4_accessargs args = {
2705 .fh = NFS_FH(inode),
a4980e78 2706 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2707 };
2708 struct nfs4_accessres res = {
2709 .server = server,
1da177e4 2710 };
1da177e4
LT		 2711 struct rpc_message msg = {
2712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2713 .rpc_argp = &args,
2714 .rpc_resp = &res,
2715 .rpc_cred = entry->cred,
2716 };
2717 int mode = entry->mask;
2718 int status;
2719
2720 /*
2721 * Determine which access bits we want to ask for...
2722 */
2723 if (mode & MAY_READ)
2724 args.access |= NFS4_ACCESS_READ;
2725 if (S_ISDIR(inode->i_mode)) {
2726 if (mode & MAY_WRITE)
2727 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2728 if (mode & MAY_EXEC)
2729 args.access |= NFS4_ACCESS_LOOKUP;
2730 } else {
2731 if (mode & MAY_WRITE)
2732 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2733 if (mode & MAY_EXEC)
2734 args.access |= NFS4_ACCESS_EXECUTE;
2735 }
c407d41a
TM		 2736
2737 res.fattr = nfs_alloc_fattr();
2738 if (res.fattr == NULL)
2739 return -ENOMEM;
2740
7c513058 2741 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2742 if (!status) {
6168f62c 2743 nfs_access_set_mask(entry, res.access);
c407d41a 2744 nfs_refresh_inode(inode, res.fattr);
1da177e4 2745 }
c407d41a 2746 nfs_free_fattr(res.fattr);
1da177e4
LT		 2747 return status;
2748}
2749
2750static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2751{
2752 struct nfs4_exception exception = { };
2753 int err;
2754 do {
2755 err = nfs4_handle_exception(NFS_SERVER(inode),
2756 _nfs4_proc_access(inode, entry),
2757 &exception);
2758 } while (exception.retry);
2759 return err;
2760}
2761
2762/*
2763 * TODO: For the time being, we don't try to get any attributes
2764 * along with any of the zero-copy operations READ, READDIR,
2765 * READLINK, WRITE.
2766 *
2767 * In the case of the first three, we want to put the GETATTR
2768 * after the read-type operation -- this is because it is hard
2769 * to predict the length of a GETATTR response in v4, and thus
2770 * align the READ data correctly. This means that the GETATTR
2771 * may end up partially falling into the page cache, and we should
2772 * shift it into the 'tail' of the xdr_buf before processing.
2773 * To do this efficiently, we need to know the total length
2774 * of data received, which doesn't seem to be available outside
2775 * of the RPC layer.
2776 *
2777 * In the case of WRITE, we also want to put the GETATTR after
2778 * the operation -- in this case because we want to make sure
140150db 2779 * we get the post-operation mtime and size.
1da177e4
LT		 2780 *
2781 * Both of these changes to the XDR layer would in fact be quite
2782 * minor, but I decided to leave them for a subsequent patch.
2783 */
2784static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2785 unsigned int pgbase, unsigned int pglen)
2786{
2787 struct nfs4_readlink args = {
2788 .fh = NFS_FH(inode),
2789 .pgbase = pgbase,
2790 .pglen = pglen,
2791 .pages = &page,
2792 };
f50c7000 2793 struct nfs4_readlink_res res;
1da177e4
LT		 2794 struct rpc_message msg = {
2795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2796 .rpc_argp = &args,
f50c7000 2797 .rpc_resp = &res,
1da177e4
LT		 2798 };
2799
7c513058 2800 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2801}
2802
2803static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2804 unsigned int pgbase, unsigned int pglen)
2805{
2806 struct nfs4_exception exception = { };
2807 int err;
2808 do {
2809 err = nfs4_handle_exception(NFS_SERVER(inode),
2810 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2811 &exception);
2812 } while (exception.retry);
2813 return err;
2814}
2815
1da177e4 2816/*
8867fe58 2817 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2818 */
1da177e4
LT		 2819static int
2820nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2821 int flags)
1da177e4 2822{
8867fe58 2823 struct nfs_open_context *ctx;
1da177e4 2824 struct nfs4_state *state;
1da177e4
LT		 2825 int status = 0;
2826
8867fe58
MS		 2827 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2828 if (IS_ERR(ctx))
2829 return PTR_ERR(ctx);
2830
a8a5da99 2831 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2832 state = nfs4_do_open(dir, dentry, ctx->mode,
2833 flags, sattr, ctx->cred,
2834 &ctx->mdsthreshold);
d4d9cdcb 2835 d_drop(dentry);
1da177e4
LT		 2836 if (IS_ERR(state)) {
2837 status = PTR_ERR(state);
c0204fd2 2838 goto out;
1da177e4 2839 }
d4d9cdcb 2840 d_add(dentry, igrab(state->inode));
d75340cc 2841 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2842 ctx->state = state;
1da177e4 2843out:
8867fe58 2844 put_nfs_open_context(ctx);
1da177e4
LT		 2845 return status;
2846}
2847
2848static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2849{
16e42959 2850 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2851 struct nfs_removeargs args = {
1da177e4 2852 .fh = NFS_FH(dir),
26fe5750 2853 .name = *name,
16e42959 2854 };
4fdc17b2 2855 struct nfs_removeres res = {
16e42959 2856 .server = server,
1da177e4 2857 };
1da177e4 2858 struct rpc_message msg = {
4fdc17b2
TM		 2859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2860 .rpc_argp = &args,
2861 .rpc_resp = &res,
1da177e4 2862 };
778d2817 2863 int status;
1da177e4 2864
7c513058 2865 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2866 if (status == 0)
16e42959 2867 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2868 return status;
2869}
2870
2871static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2872{
2873 struct nfs4_exception exception = { };
2874 int err;
2875 do {
2876 err = nfs4_handle_exception(NFS_SERVER(dir),
2877 _nfs4_proc_remove(dir, name),
2878 &exception);
2879 } while (exception.retry);
2880 return err;
2881}
2882
e4eff1a6 2883static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2884{
e4eff1a6
TM		 2885 struct nfs_server *server = NFS_SERVER(dir);
2886 struct nfs_removeargs *args = msg->rpc_argp;
2887 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2888
e4eff1a6 2889 res->server = server;
1da177e4 2890 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2891 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2892}
2893
34e137cc
BS		 2894static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2895{
d9afbd1b
TM		 2896 nfs4_setup_sequence(NFS_SERVER(data->dir),
2897 &data->args.seq_args,
2898 &data->res.seq_res,
2899 task);
1da177e4
LT		 2900}
2901
e4eff1a6 2902static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2903{
e4eff1a6
TM		 2904 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2905
14516c3a
TM		 2906 if (!nfs4_sequence_done(task, &res->seq_res))
2907 return 0;
9e33bed5 2908 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2909 return 0;
2910 update_changeattr(dir, &res->cinfo);
e4eff1a6 2911 return 1;
1da177e4
LT		 2912}
2913
d3d4152a
JL		 2914static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2915{
2916 struct nfs_server *server = NFS_SERVER(dir);
2917 struct nfs_renameargs *arg = msg->rpc_argp;
2918 struct nfs_renameres *res = msg->rpc_resp;
2919
2920 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2921 res->server = server;
9d12b216 2922 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2923}
2924
c6bfa1a1
BS		 2925static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2926{
d9afbd1b
TM		 2927 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2928 &data->args.seq_args,
2929 &data->res.seq_res,
2930 task);
d3d4152a
JL		 2931}
2932
2933static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2934 struct inode *new_dir)
2935{
2936 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2937
2938 if (!nfs4_sequence_done(task, &res->seq_res))
2939 return 0;
2940 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2941 return 0;
2942
2943 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2944 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2945 return 1;
2946}
2947
1da177e4
LT		 2948static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2949 struct inode *new_dir, struct qstr *new_name)
2950{
6caf2c82 2951 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2952 struct nfs_renameargs arg = {
1da177e4
LT		 2953 .old_dir = NFS_FH(old_dir),
2954 .new_dir = NFS_FH(new_dir),
2955 .old_name = old_name,
2956 .new_name = new_name,
6caf2c82 2957 };
e8582a8b 2958 struct nfs_renameres res = {
6caf2c82 2959 .server = server,
1da177e4 2960 };
1da177e4
LT		 2961 struct rpc_message msg = {
2962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2963 .rpc_argp = &arg,
2964 .rpc_resp = &res,
2965 };
011fff72 2966 int status = -ENOMEM;
1da177e4 2967
7c513058 2968 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2969 if (!status) {
2970 update_changeattr(old_dir, &res.old_cinfo);
2971 update_changeattr(new_dir, &res.new_cinfo);
2972 }
2973 return status;
2974}
2975
2976static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2977 struct inode *new_dir, struct qstr *new_name)
2978{
2979 struct nfs4_exception exception = { };
2980 int err;
2981 do {
2982 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2983 _nfs4_proc_rename(old_dir, old_name,
2984 new_dir, new_name),
2985 &exception);
2986 } while (exception.retry);
2987 return err;
2988}
2989
2990static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2991{
91ba2eee 2992 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2993 struct nfs4_link_arg arg = {
2994 .fh = NFS_FH(inode),
2995 .dir_fh = NFS_FH(dir),
2996 .name = name,
91ba2eee
TM		 2997 .bitmask = server->attr_bitmask,
2998 };
91ba2eee
TM		 2999 struct nfs4_link_res res = {
3000 .server = server,
1da177e4 3001 };
1da177e4
LT		 3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3004 .rpc_argp = &arg,
91ba2eee 3005 .rpc_resp = &res,
1da177e4 3006 };
136f2627
TM		 3007 int status = -ENOMEM;
3008
3009 res.fattr = nfs_alloc_fattr();
778d2817 3010 if (res.fattr == NULL)
136f2627 3011 goto out;
1da177e4 3012
7c513058 3013 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3014 if (!status) {
3015 update_changeattr(dir, &res.cinfo);
73a3d07c 3016 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3017 }
136f2627 3018out:
136f2627 3019 nfs_free_fattr(res.fattr);
1da177e4
LT		 3020 return status;
3021}
3022
3023static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3024{
3025 struct nfs4_exception exception = { };
3026 int err;
3027 do {
3028 err = nfs4_handle_exception(NFS_SERVER(inode),
3029 _nfs4_proc_link(inode, dir, name),
3030 &exception);
3031 } while (exception.retry);
3032 return err;
3033}
3034
57dc9a57
TM		 3035struct nfs4_createdata {
3036 struct rpc_message msg;
3037 struct nfs4_create_arg arg;
3038 struct nfs4_create_res res;
3039 struct nfs_fh fh;
3040 struct nfs_fattr fattr;
57dc9a57
TM		 3041};
3042
3043static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3044 struct qstr *name, struct iattr *sattr, u32 ftype)
3045{
3046 struct nfs4_createdata *data;
3047
3048 data = kzalloc(sizeof(*data), GFP_KERNEL);
3049 if (data != NULL) {
3050 struct nfs_server *server = NFS_SERVER(dir);
3051
3052 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3053 data->msg.rpc_argp = &data->arg;
3054 data->msg.rpc_resp = &data->res;
3055 data->arg.dir_fh = NFS_FH(dir);
3056 data->arg.server = server;
3057 data->arg.name = name;
3058 data->arg.attrs = sattr;
3059 data->arg.ftype = ftype;
3060 data->arg.bitmask = server->attr_bitmask;
3061 data->res.server = server;
3062 data->res.fh = &data->fh;
3063 data->res.fattr = &data->fattr;
57dc9a57 3064 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3065 }
3066 return data;
3067}
3068
3069static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3070{
7c513058 3071 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3072 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3073 if (status == 0) {
3074 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3075 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3076 }
3077 return status;
3078}
3079
3080static void nfs4_free_createdata(struct nfs4_createdata *data)
3081{
3082 kfree(data);
3083}
3084
4f390c15 3085static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3086 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3087{
57dc9a57
TM		 3088 struct nfs4_createdata *data;
3089 int status = -ENAMETOOLONG;
1da177e4 3090
94a6d753 3091 if (len > NFS4_MAXPATHLEN)
57dc9a57 3092 goto out;
4f390c15 3093
57dc9a57
TM		 3094 status = -ENOMEM;
3095 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3096 if (data == NULL)
3097 goto out;
3098
3099 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3100 data->arg.u.symlink.pages = &page;
3101 data->arg.u.symlink.len = len;
1da177e4 3102
57dc9a57
TM		 3103 status = nfs4_do_create(dir, dentry, data);
3104
3105 nfs4_free_createdata(data);
3106out:
1da177e4
LT		 3107 return status;
3108}
3109
4f390c15 3110static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3111 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3112{
3113 struct nfs4_exception exception = { };
3114 int err;
3115 do {
3116 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3117 _nfs4_proc_symlink(dir, dentry, page,
3118 len, sattr),
1da177e4
LT		 3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3125 struct iattr *sattr)
3126{
57dc9a57
TM		 3127 struct nfs4_createdata *data;
3128 int status = -ENOMEM;
1da177e4 3129
57dc9a57
TM		 3130 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3131 if (data == NULL)
3132 goto out;
3133
3134 status = nfs4_do_create(dir, dentry, data);
3135
3136 nfs4_free_createdata(data);
3137out:
1da177e4
LT		 3138 return status;
3139}
3140
3141static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3142 struct iattr *sattr)
3143{
3144 struct nfs4_exception exception = { };
3145 int err;
a8a5da99
AK		 3146
3147 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3148 do {
3149 err = nfs4_handle_exception(NFS_SERVER(dir),
3150 _nfs4_proc_mkdir(dir, dentry, sattr),
3151 &exception);
3152 } while (exception.retry);
3153 return err;
3154}
3155
3156static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3157 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3158{
3159 struct inode *dir = dentry->d_inode;
3160 struct nfs4_readdir_arg args = {
3161 .fh = NFS_FH(dir),
56e4ebf8 3162 .pages = pages,
1da177e4
LT		 3163 .pgbase = 0,
3164 .count = count,
96d25e53 3165 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3166 .plus = plus,
1da177e4
LT		 3167 };
3168 struct nfs4_readdir_res res;
3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3171 .rpc_argp = &args,
3172 .rpc_resp = &res,
3173 .rpc_cred = cred,
3174 };
3175 int status;
3176
3110ff80 3177 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3178 dentry->d_parent->d_name.name,
3179 dentry->d_name.name,
3180 (unsigned long long)cookie);
c3f52af3 3181 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3182 res.pgbase = args.pgbase;
7c513058 3183 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3184 if (status >= 0) {
c3f52af3 3185 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3186 status += args.pgbase;
3187 }
c4812998
TM		 3188
3189 nfs_invalidate_atime(dir);
3190
3110ff80 3191 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3192 return status;
3193}
3194
3195static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3196 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3197{
3198 struct nfs4_exception exception = { };
3199 int err;
3200 do {
3201 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3202 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3203 pages, count, plus),
1da177e4
LT		 3204 &exception);
3205 } while (exception.retry);
3206 return err;
3207}
3208
3209static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3210 struct iattr *sattr, dev_t rdev)
3211{
57dc9a57
TM		 3212 struct nfs4_createdata *data;
3213 int mode = sattr->ia_mode;
3214 int status = -ENOMEM;
1da177e4 3215
57dc9a57
TM		 3216 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3217 if (data == NULL)
3218 goto out;
3219
1da177e4 3220 if (S_ISFIFO(mode))
57dc9a57 3221 data->arg.ftype = NF4FIFO;
1da177e4 3222 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3223 data->arg.ftype = NF4BLK;
3224 data->arg.u.device.specdata1 = MAJOR(rdev);
3225 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3226 }
3227 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3228 data->arg.ftype = NF4CHR;
3229 data->arg.u.device.specdata1 = MAJOR(rdev);
3230 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3231 } else if (!S_ISSOCK(mode)) {
3232 status = -EINVAL;
3233 goto out_free;
1da177e4 3234 }
1da177e4 3235
57dc9a57 3236 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3237out_free:
57dc9a57
TM		 3238 nfs4_free_createdata(data);
3239out:
1da177e4
LT		 3240 return status;
3241}
3242
3243static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3244 struct iattr *sattr, dev_t rdev)
3245{
3246 struct nfs4_exception exception = { };
3247 int err;
a8a5da99
AK		 3248
3249 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3250 do {
3251 err = nfs4_handle_exception(NFS_SERVER(dir),
3252 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3253 &exception);
3254 } while (exception.retry);
3255 return err;
3256}
3257
3258static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3259 struct nfs_fsstat *fsstat)
3260{
3261 struct nfs4_statfs_arg args = {
3262 .fh = fhandle,
3263 .bitmask = server->attr_bitmask,
3264 };
24ad148a
BH		 3265 struct nfs4_statfs_res res = {
3266 .fsstat = fsstat,
3267 };
1da177e4
LT		 3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3270 .rpc_argp = &args,
24ad148a 3271 .rpc_resp = &res,
1da177e4
LT		 3272 };
3273
0e574af1 3274 nfs_fattr_init(fsstat->fattr);
7c513058 3275 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3276}
3277
3278static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3279{
3280 struct nfs4_exception exception = { };
3281 int err;
3282 do {
3283 err = nfs4_handle_exception(server,
3284 _nfs4_proc_statfs(server, fhandle, fsstat),
3285 &exception);
3286 } while (exception.retry);
3287 return err;
3288}
3289
3290static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3291 struct nfs_fsinfo *fsinfo)
3292{
3293 struct nfs4_fsinfo_arg args = {
3294 .fh = fhandle,
3295 .bitmask = server->attr_bitmask,
3296 };
3dda5e43
BH		 3297 struct nfs4_fsinfo_res res = {
3298 .fsinfo = fsinfo,
3299 };
1da177e4
LT		 3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3302 .rpc_argp = &args,
3dda5e43 3303 .rpc_resp = &res,
1da177e4
LT		 3304 };
3305
7c513058 3306 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3307}
3308
3309static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3310{
3311 struct nfs4_exception exception = { };
3312 int err;
3313
3314 do {
3315 err = nfs4_handle_exception(server,
3316 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3317 &exception);
3318 } while (exception.retry);
3319 return err;
3320}
3321
3322static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3323{
e38eb650
BS		 3324 int error;
3325
0e574af1 3326 nfs_fattr_init(fsinfo->fattr);
e38eb650 3327 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3328 if (error == 0) {
3329 /* block layout checks this! */
3330 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3331 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3332 }
e38eb650
BS		 3333
3334 return error;
1da177e4
LT		 3335}
3336
3337static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3338 struct nfs_pathconf *pathconf)
3339{
3340 struct nfs4_pathconf_arg args = {
3341 .fh = fhandle,
3342 .bitmask = server->attr_bitmask,
3343 };
d45b2989
BH		 3344 struct nfs4_pathconf_res res = {
3345 .pathconf = pathconf,
3346 };
1da177e4
LT		 3347 struct rpc_message msg = {
3348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3349 .rpc_argp = &args,
d45b2989 3350 .rpc_resp = &res,
1da177e4
LT		 3351 };
3352
3353 /* None of the pathconf attributes are mandatory to implement */
3354 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3355 memset(pathconf, 0, sizeof(*pathconf));
3356 return 0;
3357 }
3358
0e574af1 3359 nfs_fattr_init(pathconf->fattr);
7c513058 3360 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3361}
3362
3363static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3364 struct nfs_pathconf *pathconf)
3365{
3366 struct nfs4_exception exception = { };
3367 int err;
3368
3369 do {
3370 err = nfs4_handle_exception(server,
3371 _nfs4_proc_pathconf(server, fhandle, pathconf),
3372 &exception);
3373 } while (exception.retry);
3374 return err;
3375}
3376
d20581aa
BH		 3377void __nfs4_read_done_cb(struct nfs_read_data *data)
3378{
cd841605 3379 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3380}
3381
cbdabc7f 3382static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3383{
cd841605 3384 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3385
9e33bed5 3386 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3387 rpc_restart_call_prepare(task);
ec06c096 3388 return -EAGAIN;
1da177e4 3389 }
8850df99 3390
d20581aa 3391 __nfs4_read_done_cb(data);
1da177e4 3392 if (task->tk_status > 0)
ec06c096
TM		 3393 renew_lease(server, data->timestamp);
3394 return 0;
1da177e4
LT		 3395}
3396
cbdabc7f
AA		 3397static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3398{
3399
3400 dprintk("--> %s\n", __func__);
3401
3402 if (!nfs4_sequence_done(task, &data->res.seq_res))
3403 return -EAGAIN;
3404
d20581aa
BH		 3405 return data->read_done_cb ? data->read_done_cb(task, data) :
3406 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3407}
3408
bdc7f021 3409static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3410{
1da177e4 3411 data->timestamp = jiffies;
cbdabc7f 3412 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3413 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3414 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3415}
3416
ea7c3303
BS		 3417static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3418{
d9afbd1b
TM		 3419 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3420 &data->args.seq_args,
3421 &data->res.seq_res,
3422 task);
1da177e4
LT		 3423}
3424
b029bc9b 3425static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3426{
cd841605 3427 struct inode *inode = data->header->inode;
1da177e4 3428
9e33bed5 3429 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3430 rpc_restart_call_prepare(task);
788e7a89 3431 return -EAGAIN;
1da177e4 3432 }
4f9838c7 3433 if (task->tk_status >= 0) {
1da177e4 3434 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3435 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3436 }
788e7a89 3437 return 0;
1da177e4
LT		 3438}
3439
b029bc9b
FI		 3440static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3441{
3442 if (!nfs4_sequence_done(task, &data->res.seq_res))
3443 return -EAGAIN;
d20581aa
BH		 3444 return data->write_done_cb ? data->write_done_cb(task, data) :
3445 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3446}
3447
5a37f851
TM		 3448static
3449bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3450{
5a37f851
TM		 3451 const struct nfs_pgio_header *hdr = data->header;
3452
3453 /* Don't request attributes for pNFS or O_DIRECT writes */
3454 if (data->ds_clp != NULL || hdr->dreq != NULL)
3455 return false;
3456 /* Otherwise, request attributes if and only if we don't hold
3457 * a delegation
3458 */
011e2a7f 3459 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3460}
a69aef14 3461
bdc7f021 3462static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3463{
cd841605 3464 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3465
5a37f851 3466 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3467 data->args.bitmask = NULL;
3468 data->res.fattr = NULL;
3469 } else
3470 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3471
b029bc9b
FI		 3472 if (!data->write_done_cb)
3473 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3474 data->res.server = server;
1da177e4
LT		 3475 data->timestamp = jiffies;
3476
bdc7f021 3477 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3478 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3479}
3480
c6cb80d0
BS		 3481static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3482{
d9afbd1b
TM		 3483 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3484 &data->args.seq_args,
3485 &data->res.seq_res,
3486 task);
1da177e4
LT		 3487}
3488
0b7c0153 3489static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3490{
d9afbd1b
TM		 3491 nfs4_setup_sequence(NFS_SERVER(data->inode),
3492 &data->args.seq_args,
3493 &data->res.seq_res,
3494 task);
1da177e4
LT		 3495}
3496
0b7c0153 3497static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3498{
1da177e4 3499 struct inode *inode = data->inode;
14516c3a 3500
9e33bed5 3501 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3502 rpc_restart_call_prepare(task);
788e7a89 3503 return -EAGAIN;
1da177e4 3504 }
788e7a89 3505 return 0;
1da177e4
LT		 3506}
3507
0b7c0153 3508static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3509{
3510 if (!nfs4_sequence_done(task, &data->res.seq_res))
3511 return -EAGAIN;
0b7c0153 3512 return data->commit_done_cb(task, data);
5f452431
FI		 3513}
3514
0b7c0153 3515static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3516{
788e7a89 3517 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3518
0b7c0153
FI		 3519 if (data->commit_done_cb == NULL)
3520 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3521 data->res.server = server;
bdc7f021 3522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3523 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3524}
3525
9bc4e3ca
CL		 3526struct nfs4_renewdata {
3527 struct nfs_client *client;
3528 unsigned long timestamp;
3529};
3530
1da177e4
LT		 3531/*
3532 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3533 * standalone procedure for queueing an asynchronous RENEW.
3534 */
9bc4e3ca 3535static void nfs4_renew_release(void *calldata)
dc96aef9 3536{
9bc4e3ca
CL		 3537 struct nfs4_renewdata *data = calldata;
3538 struct nfs_client *clp = data->client;
dc96aef9 3539
0851de06
AB		 3540 if (atomic_read(&clp->cl_count) > 1)
3541 nfs4_schedule_state_renewal(clp);
3542 nfs_put_client(clp);
9bc4e3ca 3543 kfree(data);
dc96aef9
AB		 3544}
3545
9bc4e3ca 3546static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3547{
9bc4e3ca
CL		 3548 struct nfs4_renewdata *data = calldata;
3549 struct nfs_client *clp = data->client;
3550 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3551
3552 if (task->tk_status < 0) {
95baa25c 3553 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3554 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3555 return;
3556 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3557 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3558 return;
3559 }
3560 nfs4_schedule_path_down_recovery(clp);
1da177e4 3561 }
452e9352 3562 do_renew_lease(clp, timestamp);
1da177e4
LT		 3563}
3564
963d8fe5
TM		 3565static const struct rpc_call_ops nfs4_renew_ops = {
3566 .rpc_call_done = nfs4_renew_done,
dc96aef9 3567 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3568};
3569
2f60ea6b 3570static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3571{
3572 struct rpc_message msg = {
3573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3574 .rpc_argp = clp,
b4454fe1 3575 .rpc_cred = cred,
1da177e4 3576 };
9bc4e3ca 3577 struct nfs4_renewdata *data;
1da177e4 3578
2f60ea6b
TM		 3579 if (renew_flags == 0)
3580 return 0;
0851de06
AB		 3581 if (!atomic_inc_not_zero(&clp->cl_count))
3582 return -EIO;
b569ad34 3583 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3584 if (data == NULL)
3585 return -ENOMEM;
3586 data->client = clp;
3587 data->timestamp = jiffies;
1da177e4 3588 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3589 &nfs4_renew_ops, data);
1da177e4
LT		 3590}
3591
8534d4ec 3592static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3593{
3594 struct rpc_message msg = {
3595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3596 .rpc_argp = clp,
b4454fe1 3597 .rpc_cred = cred,
1da177e4
LT		 3598 };
3599 unsigned long now = jiffies;
3600 int status;
3601
3602 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3603 if (status < 0)
3604 return status;
452e9352 3605 do_renew_lease(clp, now);
1da177e4
LT		 3606 return 0;
3607}
3608
aa1870af
BF		 3609static inline int nfs4_server_supports_acls(struct nfs_server *server)
3610{
3611 return (server->caps & NFS_CAP_ACLS)
3612 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3613 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3614}
3615
21f498c2
TM		 3616/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3617 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3618 * the stack.
3619 */
21f498c2 3620#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3621
e9e3d724
NH		 3622static int buf_to_pages_noslab(const void *buf, size_t buflen,
3623 struct page **pages, unsigned int *pgbase)
3624{
3625 struct page *newpage, **spages;
3626 int rc = 0;
3627 size_t len;
3628 spages = pages;
3629
3630 do {
21f498c2 3631 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3632 newpage = alloc_page(GFP_KERNEL);
3633
3634 if (newpage == NULL)
3635 goto unwind;
3636 memcpy(page_address(newpage), buf, len);
3637 buf += len;
3638 buflen -= len;
3639 *pages++ = newpage;
3640 rc++;
3641 } while (buflen != 0);
3642
3643 return rc;
3644
3645unwind:
3646 for(; rc > 0; rc--)
3647 __free_page(spages[rc-1]);
3648 return -ENOMEM;
3649}
3650
e50a1c2e
BF		 3651struct nfs4_cached_acl {
3652 int cached;
3653 size_t len;
3e9d4154 3654 char data[0];
e50a1c2e
BF		 3655};
3656
3657static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3658{
3659 struct nfs_inode *nfsi = NFS_I(inode);
3660
3661 spin_lock(&inode->i_lock);
3662 kfree(nfsi->nfs4_acl);
3663 nfsi->nfs4_acl = acl;
3664 spin_unlock(&inode->i_lock);
3665}
3666
3667static void nfs4_zap_acl_attr(struct inode *inode)
3668{
3669 nfs4_set_cached_acl(inode, NULL);
3670}
3671
3672static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3673{
3674 struct nfs_inode *nfsi = NFS_I(inode);
3675 struct nfs4_cached_acl *acl;
3676 int ret = -ENOENT;
3677
3678 spin_lock(&inode->i_lock);
3679 acl = nfsi->nfs4_acl;
3680 if (acl == NULL)
3681 goto out;
3682 if (buf == NULL) /* user is just asking for length */
3683 goto out_len;
3684 if (acl->cached == 0)
3685 goto out;
3686 ret = -ERANGE; /* see getxattr(2) man page */
3687 if (acl->len > buflen)
3688 goto out;
3689 memcpy(buf, acl->data, acl->len);
3690out_len:
3691 ret = acl->len;
3692out:
3693 spin_unlock(&inode->i_lock);
3694 return ret;
3695}
3696
5794d21e 3697static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3698{
3699 struct nfs4_cached_acl *acl;
b291f1b1 3700 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3701
1f1ea6c2 3702 if (buflen <= PAGE_SIZE) {
b291f1b1 3703 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3704 if (acl == NULL)
3705 goto out;
3706 acl->cached = 1;
5794d21e 3707 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3708 } else {
3709 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3710 if (acl == NULL)
3711 goto out;
3712 acl->cached = 0;
3713 }
3714 acl->len = acl_len;
3715out:
3716 nfs4_set_cached_acl(inode, acl);
3717}
3718
bf118a34
AA		 3719/*
3720 * The getxattr API returns the required buffer length when called with a
3721 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3722 * the required buf. On a NULL buf, we send a page of data to the server
3723 * guessing that the ACL request can be serviced by a page. If so, we cache
3724 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3725 * the cache. If not so, we throw away the page, and cache the required
3726 * length. The next getxattr call will then produce another round trip to
3727 * the server, this time with the input buf of the required size.
3728 */
16b4289c 3729static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3730{
bf118a34 3731 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3732 struct nfs_getaclargs args = {
3733 .fh = NFS_FH(inode),
3734 .acl_pages = pages,
3735 .acl_len = buflen,
3736 };
663c79b3
BH		 3737 struct nfs_getaclres res = {
3738 .acl_len = buflen,
3739 };
aa1870af
BF		 3740 struct rpc_message msg = {
3741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3742 .rpc_argp = &args,
663c79b3 3743 .rpc_resp = &res,
aa1870af 3744 };
21f498c2
TM		 3745 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3746 int ret = -ENOMEM, i;
aa1870af 3747
bf118a34
AA		 3748 /* As long as we're doing a round trip to the server anyway,
3749 * let's be prepared for a page of acl data. */
3750 if (npages == 0)
3751 npages = 1;
21f498c2
TM		 3752 if (npages > ARRAY_SIZE(pages))
3753 return -ERANGE;
5a006899 3754
bf118a34
AA		 3755 for (i = 0; i < npages; i++) {
3756 pages[i] = alloc_page(GFP_KERNEL);
3757 if (!pages[i])
3758 goto out_free;
e50a1c2e 3759 }
5a006899
SP		 3760
3761 /* for decoding across pages */
3762 res.acl_scratch = alloc_page(GFP_KERNEL);
3763 if (!res.acl_scratch)
3764 goto out_free;
3765
bf118a34
AA		 3766 args.acl_len = npages * PAGE_SIZE;
3767 args.acl_pgbase = 0;
5a006899 3768
de040bec 3769 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3770 __func__, buf, buflen, npages, args.acl_len);
3771 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3772 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3773 if (ret)
3774 goto out_free;
bf118a34 3775
1f1ea6c2
TM		 3776 /* Handle the case where the passed-in buffer is too short */
3777 if (res.acl_flags & NFS4_ACL_TRUNC) {
3778 /* Did the user only issue a request for the acl length? */
3779 if (buf == NULL)
3780 goto out_ok;
e50a1c2e 3781 ret = -ERANGE;
1f1ea6c2 3782 goto out_free;
e50a1c2e 3783 }
1f1ea6c2 3784 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3785 if (buf) {
3786 if (res.acl_len > buflen) {
3787 ret = -ERANGE;
3788 goto out_free;
3789 }
1f1ea6c2 3790 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3791 }
1f1ea6c2
TM		 3792out_ok:
3793 ret = res.acl_len;
e50a1c2e 3794out_free:
bf118a34
AA		 3795 for (i = 0; i < npages; i++)
3796 if (pages[i])
3797 __free_page(pages[i]);
331818f1
TM		 3798 if (res.acl_scratch)
3799 __free_page(res.acl_scratch);
aa1870af
BF		 3800 return ret;
3801}
3802
16b4289c
TM		 3803static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3804{
3805 struct nfs4_exception exception = { };
3806 ssize_t ret;
3807 do {
3808 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3809 if (ret >= 0)
3810 break;
3811 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3812 } while (exception.retry);
3813 return ret;
3814}
3815
e50a1c2e
BF		 3816static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3817{
3818 struct nfs_server *server = NFS_SERVER(inode);
3819 int ret;
3820
3821 if (!nfs4_server_supports_acls(server))
3822 return -EOPNOTSUPP;
3823 ret = nfs_revalidate_inode(server, inode);
3824 if (ret < 0)
3825 return ret;
08a22b39
AK		 3826 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3827 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3828 ret = nfs4_read_cached_acl(inode, buf, buflen);
3829 if (ret != -ENOENT)
bf118a34
AA		 3830 /* -ENOENT is returned if there is no ACL or if there is an ACL
3831 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3832 return ret;
3833 return nfs4_get_acl_uncached(inode, buf, buflen);
3834}
3835
16b4289c 3836static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3837{
3838 struct nfs_server *server = NFS_SERVER(inode);
3839 struct page *pages[NFS4ACL_MAXPAGES];
3840 struct nfs_setaclargs arg = {
3841 .fh = NFS_FH(inode),
3842 .acl_pages = pages,
3843 .acl_len = buflen,
3844 };
73c403a9 3845 struct nfs_setaclres res;
4b580ee3
BF		 3846 struct rpc_message msg = {
3847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3848 .rpc_argp = &arg,
73c403a9 3849 .rpc_resp = &res,
4b580ee3 3850 };
21f498c2 3851 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3852 int ret, i;
4b580ee3
BF		 3853
3854 if (!nfs4_server_supports_acls(server))
3855 return -EOPNOTSUPP;
21f498c2
TM		 3856 if (npages > ARRAY_SIZE(pages))
3857 return -ERANGE;
e9e3d724
NH		 3858 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3859 if (i < 0)
3860 return i;
57ec14c5 3861 nfs4_inode_return_delegation(inode);
7c513058 3862 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3863
3864 /*
3865 * Free each page after tx, so the only ref left is
3866 * held by the network stack
3867 */
3868 for (; i > 0; i--)
3869 put_page(pages[i-1]);
3870
08a22b39
AK		 3871 /*
3872 * Acl update can result in inode attribute update.
3873 * so mark the attribute cache invalid.
3874 */
3875 spin_lock(&inode->i_lock);
3876 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3877 spin_unlock(&inode->i_lock);
f41f7418
TM		 3878 nfs_access_zap_cache(inode);
3879 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3880 return ret;
3881}
3882
16b4289c
TM		 3883static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3884{
3885 struct nfs4_exception exception = { };
3886 int err;
3887 do {
3888 err = nfs4_handle_exception(NFS_SERVER(inode),
3889 __nfs4_proc_set_acl(inode, buf, buflen),
3890 &exception);
3891 } while (exception.retry);
3892 return err;
3893}
3894
1da177e4 3895static int
aa5190d0 3896nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3897{
aa5190d0
TM		 3898 struct nfs_client *clp = server->nfs_client;
3899
3900 if (task->tk_status >= 0)
1da177e4
LT		 3901 return 0;
3902 switch(task->tk_status) {
a1d0b5ee 3903 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3904 case -NFS4ERR_ADMIN_REVOKED:
3905 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3906 if (state == NULL)
3907 break;
3908 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3909 case -NFS4ERR_OPENMODE:
3910 if (state == NULL)
3911 break;
0400a6b0
TM		 3912 nfs4_schedule_stateid_recovery(server, state);
3913 goto wait_on_recovery;
0ced63d1
TM		 3914 case -NFS4ERR_EXPIRED:
3915 if (state != NULL)
3916 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3917 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3918 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3919 nfs4_schedule_lease_recovery(clp);
3920 goto wait_on_recovery;
4745e315
AA		 3921#if defined(CONFIG_NFS_V4_1)
3922 case -NFS4ERR_BADSESSION:
3923 case -NFS4ERR_BADSLOT:
3924 case -NFS4ERR_BAD_HIGH_SLOT:
3925 case -NFS4ERR_DEADSESSION:
3926 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3927 case -NFS4ERR_SEQ_FALSE_RETRY:
3928 case -NFS4ERR_SEQ_MISORDERED:
3929 dprintk("%s ERROR %d, Reset session\n", __func__,
3930 task->tk_status);
9f594791 3931 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3932 task->tk_status = 0;
3933 return -EAGAIN;
3934#endif /* CONFIG_NFS_V4_1 */
1da177e4 3935 case -NFS4ERR_DELAY:
aa5190d0 3936 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3937 case -NFS4ERR_GRACE:
2c643488 3938 case -EKEYEXPIRED:
1da177e4
LT		 3939 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3940 task->tk_status = 0;
3941 return -EAGAIN;
a8a4ae3a 3942 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3943 case -NFS4ERR_OLD_STATEID:
3944 task->tk_status = 0;
3945 return -EAGAIN;
3946 }
3947 task->tk_status = nfs4_map_errors(task->tk_status);
3948 return 0;
0400a6b0 3949wait_on_recovery:
a2c0b9e2 3950 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3951 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3952 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3953 task->tk_status = 0;
3954 return -EAGAIN;
1da177e4
LT		 3955}
3956
f092075d
CL		 3957static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3958 nfs4_verifier *bootverf)
cd93710e
CL		 3959{
3960 __be32 verf[2];
3961
2c820d9a
CL		 3962 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3963 /* An impossible timestamp guarantees this value
3964 * will never match a generated boot time. */
3965 verf[0] = 0;
3966 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3967 } else {
f092075d
CL		 3968 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3969 verf[0] = (__be32)nn->boot_time.tv_sec;
3970 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3971 }
cd93710e
CL		 3972 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3973}
3974
e984a55a
CL		 3975static unsigned int
3976nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
3977 char *buf, size_t len)
3978{
3979 unsigned int result;
3980
3981 rcu_read_lock();
3982 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
3983 clp->cl_ipaddr,
3984 rpc_peeraddr2str(clp->cl_rpcclient,
3985 RPC_DISPLAY_ADDR),
3986 rpc_peeraddr2str(clp->cl_rpcclient,
3987 RPC_DISPLAY_PROTO));
3988 rcu_read_unlock();
3989 return result;
3990}
3991
3992static unsigned int
3993nfs4_init_uniform_client_string(const struct nfs_client *clp,
3994 char *buf, size_t len)
3995{
6f2ea7f2
CL		 3996 char *nodename = clp->cl_rpcclient->cl_nodename;
3997
3998 if (nfs4_client_id_uniquifier[0] != '\0')
3999 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4000 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4001 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4002 nodename);
e984a55a
CL		 4003}
4004
6bbb4ae8
CL		 4005/**
4006 * nfs4_proc_setclientid - Negotiate client ID
4007 * @clp: state data structure
4008 * @program: RPC program for NFSv4 callback service
4009 * @port: IP port number for NFS4 callback service
4010 * @cred: RPC credential to use for this call
4011 * @res: where to place the result
4012 *
4013 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4014 */
bb8b27e5
TM		 4015int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4016 unsigned short port, struct rpc_cred *cred,
4017 struct nfs4_setclientid_res *res)
1da177e4
LT		 4018{
4019 nfs4_verifier sc_verifier;
4020 struct nfs4_setclientid setclientid = {
4021 .sc_verifier = &sc_verifier,
4022 .sc_prog = program,
f4eecd5d 4023 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4024 };
4025 struct rpc_message msg = {
4026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4027 .rpc_argp = &setclientid,
bb8b27e5 4028 .rpc_resp = res,
286d7d6a 4029 .rpc_cred = cred,
1da177e4 4030 };
6bbb4ae8 4031 int status;
1da177e4 4032
de734831 4033 /* nfs_client_id4 */
f092075d 4034 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4035 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4036 setclientid.sc_name_len =
4037 nfs4_init_uniform_client_string(clp,
4038 setclientid.sc_name,
4039 sizeof(setclientid.sc_name));
4040 else
4041 setclientid.sc_name_len =
4042 nfs4_init_nonuniform_client_string(clp,
4043 setclientid.sc_name,
4044 sizeof(setclientid.sc_name));
de734831 4045 /* cb_client4 */
e984a55a 4046 rcu_read_lock();
de734831 4047 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4048 sizeof(setclientid.sc_netid),
4049 rpc_peeraddr2str(clp->cl_rpcclient,
4050 RPC_DISPLAY_NETID));
de734831
CL		 4051 rcu_read_unlock();
4052 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4053 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4054 clp->cl_ipaddr, port >> 8, port & 255);
4055
6bbb4ae8
CL		 4056 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4057 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4058 setclientid.sc_name_len, setclientid.sc_name);
4059 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4060 dprintk("NFS reply setclientid: %d\n", status);
4061 return status;
1da177e4
LT		 4062}
4063
6bbb4ae8
CL		 4064/**
4065 * nfs4_proc_setclientid_confirm - Confirm client ID
4066 * @clp: state data structure
4067 * @res: result of a previous SETCLIENTID
4068 * @cred: RPC credential to use for this call
4069 *
4070 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4071 */
fd954ae1 4072int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4073 struct nfs4_setclientid_res *arg,
4074 struct rpc_cred *cred)
1da177e4
LT		 4075{
4076 struct nfs_fsinfo fsinfo;
4077 struct rpc_message msg = {
4078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4079 .rpc_argp = arg,
1da177e4 4080 .rpc_resp = &fsinfo,
286d7d6a 4081 .rpc_cred = cred,
1da177e4
LT		 4082 };
4083 unsigned long now;
4084 int status;
4085
6bbb4ae8
CL		 4086 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4087 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4088 clp->cl_clientid);
1da177e4 4089 now = jiffies;
1bd714f2 4090 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4091 if (status == 0) {
4092 spin_lock(&clp->cl_lock);
4093 clp->cl_lease_time = fsinfo.lease_time * HZ;
4094 clp->cl_last_renewal = now;
4095 spin_unlock(&clp->cl_lock);
4096 }
6bbb4ae8 4097 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4098 return status;
4099}
4100
fe650407
TM		 4101struct nfs4_delegreturndata {
4102 struct nfs4_delegreturnargs args;
fa178f29 4103 struct nfs4_delegreturnres res;
fe650407
TM		 4104 struct nfs_fh fh;
4105 nfs4_stateid stateid;
26e976a8 4106 unsigned long timestamp;
fa178f29 4107 struct nfs_fattr fattr;
fe650407
TM		 4108 int rpc_status;
4109};
4110
fe650407
TM		 4111static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4112{
4113 struct nfs4_delegreturndata *data = calldata;
938e1010 4114
14516c3a
TM		 4115 if (!nfs4_sequence_done(task, &data->res.seq_res))
4116 return;
938e1010 4117
79708861
RL		 4118 switch (task->tk_status) {
4119 case -NFS4ERR_STALE_STATEID:
4120 case -NFS4ERR_EXPIRED:
4121 case 0:
fa178f29 4122 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4123 break;
4124 default:
4125 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4126 -EAGAIN) {
d00c5d43 4127 rpc_restart_call_prepare(task);
79708861
RL		 4128 return;
4129 }
4130 }
4131 data->rpc_status = task->tk_status;
fe650407
TM		 4132}
4133
4134static void nfs4_delegreturn_release(void *calldata)
4135{
fe650407
TM		 4136 kfree(calldata);
4137}
4138
938e1010
AA		 4139#if defined(CONFIG_NFS_V4_1)
4140static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4141{
4142 struct nfs4_delegreturndata *d_data;
4143
4144 d_data = (struct nfs4_delegreturndata *)data;
4145
d9afbd1b
TM		 4146 nfs4_setup_sequence(d_data->res.server,
4147 &d_data->args.seq_args,
4148 &d_data->res.seq_res,
4149 task);
938e1010
AA		 4150}
4151#endif /* CONFIG_NFS_V4_1 */
4152
c8d149f3 4153static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4154#if defined(CONFIG_NFS_V4_1)
4155 .rpc_call_prepare = nfs4_delegreturn_prepare,
4156#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4157 .rpc_call_done = nfs4_delegreturn_done,
4158 .rpc_release = nfs4_delegreturn_release,
4159};
4160
e6f81075 4161static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4162{
4163 struct nfs4_delegreturndata *data;
fa178f29 4164 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4165 struct rpc_task *task;
5138fde0
TM		 4166 struct rpc_message msg = {
4167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4168 .rpc_cred = cred,
4169 };
c970aa85
TM		 4170 struct rpc_task_setup task_setup_data = {
4171 .rpc_client = server->client,
5138fde0 4172 .rpc_message = &msg,
c970aa85
TM		 4173 .callback_ops = &nfs4_delegreturn_ops,
4174 .flags = RPC_TASK_ASYNC,
4175 };
e6f81075 4176 int status = 0;
fe650407 4177
8535b2be 4178 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4179 if (data == NULL)
4180 return -ENOMEM;
9d12b216 4181 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4182 data->args.fhandle = &data->fh;
4183 data->args.stateid = &data->stateid;
9e907fec 4184 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4185 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4186 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4187 data->res.fattr = &data->fattr;
4188 data->res.server = server;
5138fde0 4189 nfs_fattr_init(data->res.fattr);
26e976a8 4190 data->timestamp = jiffies;
fe650407
TM		 4191 data->rpc_status = 0;
4192
c970aa85 4193 task_setup_data.callback_data = data;
1174dd1f
TM		 4194 msg.rpc_argp = &data->args;
4195 msg.rpc_resp = &data->res;
c970aa85 4196 task = rpc_run_task(&task_setup_data);
7a1218a2 4197 if (IS_ERR(task))
fe650407 4198 return PTR_ERR(task);
e6f81075
TM		 4199 if (!issync)
4200 goto out;
fe650407 4201 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4202 if (status != 0)
4203 goto out;
4204 status = data->rpc_status;
e144cbcc
TM		 4205 if (status == 0)
4206 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4207 else
4208 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4209out:
e6b3c4db 4210 rpc_put_task(task);
fe650407 4211 return status;
1da177e4
LT		 4212}
4213
e6f81075 4214int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4215{
4216 struct nfs_server *server = NFS_SERVER(inode);
4217 struct nfs4_exception exception = { };
4218 int err;
4219 do {
e6f81075 4220 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4221 switch (err) {
4222 case -NFS4ERR_STALE_STATEID:
4223 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4224 case 0:
4225 return 0;
4226 }
4227 err = nfs4_handle_exception(server, err, &exception);
4228 } while (exception.retry);
4229 return err;
4230}
4231
4232#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4233#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4234
4235/*
4236 * sleep, with exponential backoff, and retry the LOCK operation.
4237 */
4238static unsigned long
4239nfs4_set_lock_task_retry(unsigned long timeout)
4240{
d310310c 4241 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4242 timeout <<= 1;
4243 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4244 return NFS4_LOCK_MAXTIMEOUT;
4245 return timeout;
4246}
4247
1da177e4
LT		 4248static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4249{
4250 struct inode *inode = state->inode;
4251 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4252 struct nfs_client *clp = server->nfs_client;
911d1aaf 4253 struct nfs_lockt_args arg = {
1da177e4 4254 .fh = NFS_FH(inode),
911d1aaf 4255 .fl = request,
1da177e4 4256 };
911d1aaf
TM		 4257 struct nfs_lockt_res res = {
4258 .denied = request,
1da177e4
LT		 4259 };
4260 struct rpc_message msg = {
4261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4262 .rpc_argp = &arg,
4263 .rpc_resp = &res,
4264 .rpc_cred = state->owner->so_cred,
4265 };
1da177e4
LT		 4266 struct nfs4_lock_state *lsp;
4267 int status;
4268
911d1aaf 4269 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4270 status = nfs4_set_lock_state(state, request);
4271 if (status != 0)
4272 goto out;
4273 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4274 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4275 arg.lock_owner.s_dev = server->s_dev;
7c513058 4276 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4277 switch (status) {
4278 case 0:
4279 request->fl_type = F_UNLCK;
4280 break;
4281 case -NFS4ERR_DENIED:
4282 status = 0;
1da177e4 4283 }
70cc6487 4284 request->fl_ops->fl_release_private(request);
8d0a8a9d 4285out:
1da177e4
LT		 4286 return status;
4287}
4288
4289static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4290{
4291 struct nfs4_exception exception = { };
4292 int err;
4293
4294 do {
4295 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4296 _nfs4_proc_getlk(state, cmd, request),
4297 &exception);
4298 } while (exception.retry);
4299 return err;
4300}
4301
4302static int do_vfs_lock(struct file *file, struct file_lock *fl)
4303{
4304 int res = 0;
4305 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4306 case FL_POSIX:
4307 res = posix_lock_file_wait(file, fl);
4308 break;
4309 case FL_FLOCK:
4310 res = flock_lock_file_wait(file, fl);
4311 break;
4312 default:
4313 BUG();
4314 }
1da177e4
LT		 4315 return res;
4316}
4317
faf5f49c 4318struct nfs4_unlockdata {
911d1aaf
TM		 4319 struct nfs_locku_args arg;
4320 struct nfs_locku_res res;
faf5f49c
TM		 4321 struct nfs4_lock_state *lsp;
4322 struct nfs_open_context *ctx;
911d1aaf
TM		 4323 struct file_lock fl;
4324 const struct nfs_server *server;
26e976a8 4325 unsigned long timestamp;
faf5f49c
TM		 4326};
4327
911d1aaf
TM		 4328static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4329 struct nfs_open_context *ctx,
4330 struct nfs4_lock_state *lsp,
4331 struct nfs_seqid *seqid)
4332{
4333 struct nfs4_unlockdata *p;
4334 struct inode *inode = lsp->ls_state->inode;
4335
8535b2be 4336 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4337 if (p == NULL)
4338 return NULL;
4339 p->arg.fh = NFS_FH(inode);
4340 p->arg.fl = &p->fl;
4341 p->arg.seqid = seqid;
c1d51931 4342 p->res.seqid = seqid;
911d1aaf
TM		 4343 p->arg.stateid = &lsp->ls_stateid;
4344 p->lsp = lsp;
4345 atomic_inc(&lsp->ls_count);
4346 /* Ensure we don't close file until we're done freeing locks! */
4347 p->ctx = get_nfs_open_context(ctx);
4348 memcpy(&p->fl, fl, sizeof(p->fl));
4349 p->server = NFS_SERVER(inode);
4350 return p;
4351}
4352
06f814a3 4353static void nfs4_locku_release_calldata(void *data)
faf5f49c 4354{
963d8fe5 4355 struct nfs4_unlockdata *calldata = data;
911d1aaf 4356 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4357 nfs4_put_lock_state(calldata->lsp);
4358 put_nfs_open_context(calldata->ctx);
4359 kfree(calldata);
faf5f49c
TM		 4360}
4361
963d8fe5 4362static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4363{
963d8fe5 4364 struct nfs4_unlockdata *calldata = data;
faf5f49c 4365
14516c3a
TM		 4366 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4367 return;
faf5f49c
TM		 4368 switch (task->tk_status) {
4369 case 0:
f597c537
TM		 4370 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4371 &calldata->res.stateid);
26e976a8 4372 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4373 break;
9e33bed5
TM		 4374 case -NFS4ERR_BAD_STATEID:
4375 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4376 case -NFS4ERR_STALE_STATEID:
4377 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4378 break;
4379 default:
9e33bed5 4380 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4381 rpc_restart_call_prepare(task);
faf5f49c 4382 }
2b1bc308 4383 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4384}
4385
4ce70ada 4386static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4387{
4ce70ada 4388 struct nfs4_unlockdata *calldata = data;
faf5f49c 4389
911d1aaf 4390 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4391 return;
795a88c9 4392 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4393 /* Note: exit _without_ running nfs4_locku_done */
4394 task->tk_action = NULL;
b75ad4cd 4395 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4396 return;
4397 }
26e976a8 4398 calldata->timestamp = jiffies;
035168ab 4399 if (nfs4_setup_sequence(calldata->server,
a893693c 4400 &calldata->arg.seq_args,
2240a9e2
TM		 4401 &calldata->res.seq_res,
4402 task) != 0)
4403 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4404}
4405
963d8fe5 4406static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4407 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4408 .rpc_call_done = nfs4_locku_done,
06f814a3 4409 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4410};
4411
a5d16a4d
TM		 4412static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4413 struct nfs_open_context *ctx,
4414 struct nfs4_lock_state *lsp,
4415 struct nfs_seqid *seqid)
4416{
4417 struct nfs4_unlockdata *data;
5138fde0
TM		 4418 struct rpc_message msg = {
4419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4420 .rpc_cred = ctx->cred,
4421 };
c970aa85
TM		 4422 struct rpc_task_setup task_setup_data = {
4423 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4424 .rpc_message = &msg,
c970aa85 4425 .callback_ops = &nfs4_locku_ops,
101070ca 4426 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4427 .flags = RPC_TASK_ASYNC,
4428 };
a5d16a4d 4429
137d6aca
FF		 4430 /* Ensure this is an unlock - when canceling a lock, the
4431 * canceled lock is passed in, and it won't be an unlock.
4432 */
4433 fl->fl_type = F_UNLCK;
4434
a5d16a4d
TM		 4435 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4436 if (data == NULL) {
4437 nfs_free_seqid(seqid);
4438 return ERR_PTR(-ENOMEM);
4439 }
4440
9d12b216 4441 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4442 msg.rpc_argp = &data->arg;
4443 msg.rpc_resp = &data->res;
c970aa85
TM		 4444 task_setup_data.callback_data = data;
4445 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4446}
4447
faf5f49c
TM		 4448static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4449{
19e03c57 4450 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4451 struct nfs_seqid *seqid;
1da177e4 4452 struct nfs4_lock_state *lsp;
06f814a3
TM		 4453 struct rpc_task *task;
4454 int status = 0;
536ff0f8 4455 unsigned char fl_flags = request->fl_flags;
faf5f49c 4456
8d0a8a9d 4457 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4458 /* Unlock _before_ we do the RPC call */
4459 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4460 down_read(&nfsi->rwsem);
4461 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4462 up_read(&nfsi->rwsem);
9b073574 4463 goto out;
19e03c57
TM		 4464 }
4465 up_read(&nfsi->rwsem);
8d0a8a9d 4466 if (status != 0)
9b073574
TM		 4467 goto out;
4468 /* Is this a delegated lock? */
4469 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4470 goto out;
8d0a8a9d 4471 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4472 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4473 status = -ENOMEM;
911d1aaf 4474 if (seqid == NULL)
9b073574 4475 goto out;
cd3758e3 4476 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4477 status = PTR_ERR(task);
4478 if (IS_ERR(task))
9b073574 4479 goto out;
a5d16a4d 4480 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4481 rpc_put_task(task);
9b073574 4482out:
536ff0f8 4483 request->fl_flags = fl_flags;
1da177e4
LT		 4484 return status;
4485}
4486
a5d16a4d
TM		 4487struct nfs4_lockdata {
4488 struct nfs_lock_args arg;
4489 struct nfs_lock_res res;
4490 struct nfs4_lock_state *lsp;
4491 struct nfs_open_context *ctx;
4492 struct file_lock fl;
26e976a8 4493 unsigned long timestamp;
a5d16a4d
TM		 4494 int rpc_status;
4495 int cancelled;
66179efe 4496 struct nfs_server *server;
a5d16a4d
TM		 4497};
4498
4499static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4500 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4501 gfp_t gfp_mask)
1da177e4 4502{
a5d16a4d
TM		 4503 struct nfs4_lockdata *p;
4504 struct inode *inode = lsp->ls_state->inode;
1da177e4 4505 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4506
8535b2be 4507 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4508 if (p == NULL)
4509 return NULL;
4510
4511 p->arg.fh = NFS_FH(inode);
4512 p->arg.fl = &p->fl;
8535b2be 4513 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4514 if (p->arg.open_seqid == NULL)
4515 goto out_free;
8535b2be 4516 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4517 if (p->arg.lock_seqid == NULL)
2f74c0a0 4518 goto out_free_seqid;
a5d16a4d 4519 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4520 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4521 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4522 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4523 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4524 p->lsp = lsp;
66179efe 4525 p->server = server;
a5d16a4d
TM		 4526 atomic_inc(&lsp->ls_count);
4527 p->ctx = get_nfs_open_context(ctx);
4528 memcpy(&p->fl, fl, sizeof(p->fl));
4529 return p;
2f74c0a0
TM		 4530out_free_seqid:
4531 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4532out_free:
4533 kfree(p);
4534 return NULL;
4535}
4536
4537static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4538{
4539 struct nfs4_lockdata *data = calldata;
4540 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4541
3110ff80 4542 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4543 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4544 return;
a5d16a4d
TM		 4545 /* Do we need to do an open_to_lock_owner? */
4546 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4547 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4548 goto out_release_lock_seqid;
8fe72bac 4549 }
a5d16a4d
TM		 4550 data->arg.open_stateid = &state->stateid;
4551 data->arg.new_lock_owner = 1;
c1d51931 4552 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4553 } else
4554 data->arg.new_lock_owner = 0;
26e976a8 4555 data->timestamp = jiffies;
035168ab
TM		 4556 if (nfs4_setup_sequence(data->server,
4557 &data->arg.seq_args,
2240a9e2 4558 &data->res.seq_res,
d9afbd1b 4559 task) == 0)
66179efe 4560 return;
2240a9e2
TM		 4561 nfs_release_seqid(data->arg.open_seqid);
4562out_release_lock_seqid:
4563 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4564 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4565}
4566
a5d16a4d
TM		 4567static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4568{
4569 struct nfs4_lockdata *data = calldata;
4570
3110ff80 4571 dprintk("%s: begin!\n", __func__);
a5d16a4d 4572
14516c3a
TM		 4573 if (!nfs4_sequence_done(task, &data->res.seq_res))
4574 return;
66179efe 4575
a5d16a4d 4576 data->rpc_status = task->tk_status;
a5d16a4d 4577 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4578 if (data->rpc_status == 0)
4579 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4580 else
4581 goto out;
4582 }
4583 if (data->rpc_status == 0) {
f597c537 4584 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4585 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4586 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4587 }
a5d16a4d 4588out:
3110ff80 4589 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4590}
4591
4592static void nfs4_lock_release(void *calldata)
4593{
4594 struct nfs4_lockdata *data = calldata;
4595
3110ff80 4596 dprintk("%s: begin!\n", __func__);
2f74c0a0 4597 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4598 if (data->cancelled != 0) {
4599 struct rpc_task *task;
4600 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4601 data->arg.lock_seqid);
4602 if (!IS_ERR(task))
bf294b41 4603 rpc_put_task_async(task);
3110ff80 4604 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4605 } else
4606 nfs_free_seqid(data->arg.lock_seqid);
4607 nfs4_put_lock_state(data->lsp);
4608 put_nfs_open_context(data->ctx);
4609 kfree(data);
3110ff80 4610 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4611}
4612
4613static const struct rpc_call_ops nfs4_lock_ops = {
4614 .rpc_call_prepare = nfs4_lock_prepare,
4615 .rpc_call_done = nfs4_lock_done,
4616 .rpc_release = nfs4_lock_release,
4617};
4618
2bee72a6
TM		 4619static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4620{
2bee72a6
TM		 4621 switch (error) {
4622 case -NFS4ERR_ADMIN_REVOKED:
4623 case -NFS4ERR_BAD_STATEID:
ecac799a 4624 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4625 if (new_lock_owner != 0 ||
795a88c9 4626 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4627 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4628 break;
4629 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4630 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4631 case -NFS4ERR_EXPIRED:
4632 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4633 };
4634}
4635
afe6c27c 4636static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4637{
4638 struct nfs4_lockdata *data;
4639 struct rpc_task *task;
5138fde0
TM		 4640 struct rpc_message msg = {
4641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4642 .rpc_cred = state->owner->so_cred,
4643 };
c970aa85
TM		 4644 struct rpc_task_setup task_setup_data = {
4645 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4646 .rpc_message = &msg,
c970aa85 4647 .callback_ops = &nfs4_lock_ops,
101070ca 4648 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4649 .flags = RPC_TASK_ASYNC,
4650 };
a5d16a4d
TM		 4651 int ret;
4652
3110ff80 4653 dprintk("%s: begin!\n", __func__);
cd3758e3 4654 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4655 fl->fl_u.nfs4_fl.owner,
4656 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4657 if (data == NULL)
4658 return -ENOMEM;
4659 if (IS_SETLKW(cmd))
4660 data->arg.block = 1;
9d12b216 4661 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4662 msg.rpc_argp = &data->arg;
4663 msg.rpc_resp = &data->res;
c970aa85 4664 task_setup_data.callback_data = data;
8fe72bac
TM		 4665 if (recovery_type > NFS_LOCK_NEW) {
4666 if (recovery_type == NFS_LOCK_RECLAIM)
4667 data->arg.reclaim = NFS_LOCK_RECLAIM;
4668 nfs4_set_sequence_privileged(&data->arg.seq_args);
4669 }
c970aa85 4670 task = rpc_run_task(&task_setup_data);
7a1218a2 4671 if (IS_ERR(task))
a5d16a4d 4672 return PTR_ERR(task);
a5d16a4d
TM		 4673 ret = nfs4_wait_for_completion_rpc_task(task);
4674 if (ret == 0) {
4675 ret = data->rpc_status;
2bee72a6
TM		 4676 if (ret)
4677 nfs4_handle_setlk_error(data->server, data->lsp,
4678 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4679 } else
4680 data->cancelled = 1;
e6b3c4db 4681 rpc_put_task(task);
3110ff80 4682 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4683 return ret;
1da177e4
LT		 4684}
4685
4686static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4687{
202b50dc 4688 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4689 struct nfs4_exception exception = {
4690 .inode = state->inode,
4691 };
202b50dc
TM		 4692 int err;
4693
4694 do {
42a2d13e
TM		 4695 /* Cache the lock if possible... */
4696 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4697 return 0;
afe6c27c 4698 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4699 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4700 break;
4701 nfs4_handle_exception(server, err, &exception);
4702 } while (exception.retry);
4703 return err;
1da177e4
LT		 4704}
4705
4706static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4707{
202b50dc 4708 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4709 struct nfs4_exception exception = {
4710 .inode = state->inode,
4711 };
202b50dc
TM		 4712 int err;
4713
6bfc93ef
TM		 4714 err = nfs4_set_lock_state(state, request);
4715 if (err != 0)
4716 return err;
202b50dc 4717 do {
42a2d13e
TM		 4718 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4719 return 0;
afe6c27c 4720 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4721 switch (err) {
4722 default:
4723 goto out;
4724 case -NFS4ERR_GRACE:
4725 case -NFS4ERR_DELAY:
4726 nfs4_handle_exception(server, err, &exception);
4727 err = 0;
4728 }
202b50dc 4729 } while (exception.retry);
a9ed2e25 4730out:
202b50dc 4731 return err;
1da177e4
LT		 4732}
4733
f062eb6c 4734#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4735/**
4736 * nfs41_check_expired_locks - possibly free a lock stateid
4737 *
4738 * @state: NFSv4 state for an inode
4739 *
4740 * Returns NFS_OK if recovery for this stateid is now finished.
4741 * Otherwise a negative NFS4ERR value is returned.
4742 */
b01dd1d8 4743static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4744{
eb64cf96 4745 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4746 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4747 struct nfs_server *server = NFS_SERVER(state->inode);
4748
b01dd1d8 4749 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4750 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4751 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4752 if (status != NFS_OK) {
3e60ffdd
CL		 4753 /* Free the stateid unless the server
4754 * informs us the stateid is unrecognized. */
89af2739
CL		 4755 if (status != -NFS4ERR_BAD_STATEID)
4756 nfs41_free_stateid(server,
4757 &lsp->ls_stateid);
795a88c9 4758 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4759 ret = status;
4760 }
4761 }
4762 };
4763
4764 return ret;
4765}
4766
4767static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4768{
4769 int status = NFS_OK;
4770
4771 if (test_bit(LK_STATE_IN_USE, &state->flags))
4772 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4773 if (status != NFS_OK)
4774 status = nfs4_lock_expired(state, request);
4775 return status;
f062eb6c
BS		 4776}
4777#endif
4778
1da177e4
LT		 4779static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4780{
19e03c57 4781 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4782 unsigned char fl_flags = request->fl_flags;
8e469ebd 4783 int status = -ENOLCK;
1da177e4 4784
8e469ebd
TM		 4785 if ((fl_flags & FL_POSIX) &&
4786 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4787 goto out;
6bfc93ef 4788 /* Is this a delegated open? */
6bfc93ef
TM		 4789 status = nfs4_set_lock_state(state, request);
4790 if (status != 0)
4791 goto out;
01c3b861
TM		 4792 request->fl_flags |= FL_ACCESS;
4793 status = do_vfs_lock(request->fl_file, request);
4794 if (status < 0)
4795 goto out;
19e03c57 4796 down_read(&nfsi->rwsem);
01c3b861 4797 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4798 /* Yes: cache locks! */
01c3b861 4799 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4800 request->fl_flags = fl_flags & ~FL_SLEEP;
4801 status = do_vfs_lock(request->fl_file, request);
4802 goto out_unlock;
01c3b861 4803 }
afe6c27c 4804 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4805 if (status != 0)
01c3b861 4806 goto out_unlock;
6bfc93ef 4807 /* Note: we always want to sleep here! */
01c3b861 4808 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4809 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4810 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4811 "manager!\n", __func__);
01c3b861 4812out_unlock:
19e03c57 4813 up_read(&nfsi->rwsem);
01c3b861
TM		 4814out:
4815 request->fl_flags = fl_flags;
1da177e4
LT		 4816 return status;
4817}
4818
4819static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4820{
a1d0b5ee
TM		 4821 struct nfs4_exception exception = {
4822 .state = state,
05ffe24f 4823 .inode = state->inode,
a1d0b5ee 4824 };
1da177e4
LT		 4825 int err;
4826
4827 do {
965b5d67
TM		 4828 err = _nfs4_proc_setlk(state, cmd, request);
4829 if (err == -NFS4ERR_DENIED)
4830 err = -EAGAIN;
1da177e4 4831 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4832 err, &exception);
1da177e4
LT		 4833 } while (exception.retry);
4834 return err;
4835}
4836
4837static int
4838nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4839{
4840 struct nfs_open_context *ctx;
4841 struct nfs4_state *state;
4842 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4843 int status;
4844
4845 /* verify open state */
cd3758e3 4846 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4847 state = ctx->state;
4848
4849 if (request->fl_start < 0 || request->fl_end < 0)
4850 return -EINVAL;
4851
d953126a
TM		 4852 if (IS_GETLK(cmd)) {
4853 if (state != NULL)
4854 return nfs4_proc_getlk(state, F_GETLK, request);
4855 return 0;
4856 }
1da177e4
LT		 4857
4858 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4859 return -EINVAL;
4860
d953126a
TM		 4861 if (request->fl_type == F_UNLCK) {
4862 if (state != NULL)
4863 return nfs4_proc_unlck(state, cmd, request);
4864 return 0;
4865 }
1da177e4 4866
d953126a
TM		 4867 if (state == NULL)
4868 return -ENOLCK;
55725513
TM		 4869 /*
4870 * Don't rely on the VFS having checked the file open mode,
4871 * since it won't do this for flock() locks.
4872 */
f44106e2 4873 switch (request->fl_type) {
55725513
TM		 4874 case F_RDLCK:
4875 if (!(filp->f_mode & FMODE_READ))
4876 return -EBADF;
4877 break;
4878 case F_WRLCK:
4879 if (!(filp->f_mode & FMODE_WRITE))
4880 return -EBADF;
4881 }
4882
1da177e4
LT		 4883 do {
4884 status = nfs4_proc_setlk(state, cmd, request);
4885 if ((status != -EAGAIN) || IS_SETLK(cmd))
4886 break;
4887 timeout = nfs4_set_lock_task_retry(timeout);
4888 status = -ERESTARTSYS;
4889 if (signalled())
4890 break;
4891 } while(status < 0);
1da177e4
LT		 4892 return status;
4893}
4894
888e694c
TM		 4895int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4896{
4897 struct nfs_server *server = NFS_SERVER(state->inode);
4898 struct nfs4_exception exception = { };
4899 int err;
4900
4901 err = nfs4_set_lock_state(state, fl);
4902 if (err != 0)
4903 goto out;
4904 do {
afe6c27c 4905 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4906 switch (err) {
4907 default:
a030889a
WAA		 4908 printk(KERN_ERR "NFS: %s: unhandled error "
4909 "%d.\n", __func__, err);
d5122201 4910 case 0:
965b5d67 4911 case -ESTALE:
d5122201
TM		 4912 goto out;
4913 case -NFS4ERR_EXPIRED:
0ced63d1 4914 nfs4_schedule_stateid_recovery(server, state);
d5122201 4915 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4916 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4917 nfs4_schedule_lease_recovery(server->nfs_client);
4918 goto out;
74e7bb73
RL		 4919 case -NFS4ERR_BADSESSION:
4920 case -NFS4ERR_BADSLOT:
4921 case -NFS4ERR_BAD_HIGH_SLOT:
4922 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4923 case -NFS4ERR_DEADSESSION:
9f594791 4924 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4925 goto out;
965b5d67
TM		 4926 case -ERESTARTSYS:
4927 /*
4928 * The show must go on: exit, but mark the
4929 * stateid as needing recovery.
4930 */
a1d0b5ee 4931 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4932 case -NFS4ERR_ADMIN_REVOKED:
4933 case -NFS4ERR_BAD_STATEID:
4934 case -NFS4ERR_OPENMODE:
0400a6b0 4935 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4936 err = 0;
4937 goto out;
168667c4
TM		 4938 case -EKEYEXPIRED:
4939 /*
4940 * User RPCSEC_GSS context has expired.
4941 * We cannot recover this stateid now, so
4942 * skip it and allow recovery thread to
4943 * proceed.
4944 */
4945 err = 0;
4946 goto out;
965b5d67
TM		 4947 case -ENOMEM:
4948 case -NFS4ERR_DENIED:
4949 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4950 err = 0;
4951 goto out;
d5122201
TM		 4952 case -NFS4ERR_DELAY:
4953 break;
4954 }
888e694c
TM		 4955 err = nfs4_handle_exception(server, err, &exception);
4956 } while (exception.retry);
4957out:
4958 return err;
4959}
6b3b5496 4960
cf470c3e
TM		 4961struct nfs_release_lockowner_data {
4962 struct nfs4_lock_state *lsp;
5ae67c4f 4963 struct nfs_server *server;
cf470c3e
TM		 4964 struct nfs_release_lockowner_args args;
4965};
4966
d3c7b7cc
TM		 4967static void nfs4_release_lockowner_release(void *calldata)
4968{
cf470c3e 4969 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4970 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4971 kfree(calldata);
4972}
4973
17280175 4974static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4975 .rpc_release = nfs4_release_lockowner_release,
4976};
4977
cf470c3e 4978int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4979{
4980 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4981 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4982 struct rpc_message msg = {
4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4984 };
4985
4986 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4987 return -EINVAL;
4988 data = kmalloc(sizeof(*data), GFP_NOFS);
4989 if (!data)
4990 return -ENOMEM;
4991 data->lsp = lsp;
5ae67c4f 4992 data->server = server;
cf470c3e
TM		 4993 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4994 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4995 data->args.lock_owner.s_dev = server->s_dev;
4996 msg.rpc_argp = &data->args;
4997 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4998 return 0;
d3c7b7cc
TM		 4999}
5000
aa1870af
BF		 5001#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5002
64c2ce8b
AK		 5003static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5004 const void *buf, size_t buflen,
5005 int flags, int type)
6b3b5496 5006{
64c2ce8b
AK		 5007 if (strcmp(key, "") != 0)
5008 return -EINVAL;
4b580ee3 5009
64c2ce8b 5010 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5011}
5012
64c2ce8b
AK		 5013static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5014 void *buf, size_t buflen, int type)
6b3b5496 5015{
64c2ce8b
AK		 5016 if (strcmp(key, "") != 0)
5017 return -EINVAL;
aa1870af 5018
64c2ce8b 5019 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5020}
5021
64c2ce8b
AK		 5022static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5023 size_t list_len, const char *name,
5024 size_t name_len, int type)
6b3b5496 5025{
64c2ce8b 5026 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5027
096455a2
BF		 5028 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5029 return 0;
64c2ce8b
AK		 5030
5031 if (list && len <= list_len)
5032 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5033 return len;
6b3b5496
BF		 5034}
5035
533eb461
AA		 5036/*
5037 * nfs_fhget will use either the mounted_on_fileid or the fileid
5038 */
69aaaae1
TM		 5039static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5040{
533eb461
AA		 5041 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5042 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5043 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5044 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5045 return;
5046
5047 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5048 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5049 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5050 fattr->nlink = 2;
5051}
5052
f05d147f
BS		 5053static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5054 const struct qstr *name,
5055 struct nfs4_fs_locations *fs_locations,
5056 struct page *page)
683b57b4
TM		 5057{
5058 struct nfs_server *server = NFS_SERVER(dir);
5059 u32 bitmask[2] = {
361e624f 5060 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5061 };
5062 struct nfs4_fs_locations_arg args = {
5063 .dir_fh = NFS_FH(dir),
c228fd3a 5064 .name = name,
683b57b4
TM		 5065 .page = page,
5066 .bitmask = bitmask,
5067 };
22958463
BH		 5068 struct nfs4_fs_locations_res res = {
5069 .fs_locations = fs_locations,
5070 };
683b57b4
TM		 5071 struct rpc_message msg = {
5072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5073 .rpc_argp = &args,
22958463 5074 .rpc_resp = &res,
683b57b4
TM		 5075 };
5076 int status;
5077
3110ff80 5078 dprintk("%s: start\n", __func__);
533eb461
AA		 5079
5080 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5081 * is not supported */
5082 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5083 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5084 else
5085 bitmask[0] |= FATTR4_WORD0_FILEID;
5086
c228fd3a 5087 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5088 fs_locations->server = server;
830b8e33 5089 fs_locations->nlocations = 0;
f05d147f 5090 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5091 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5092 return status;
5093}
5094
f05d147f
BS		 5095int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5096 const struct qstr *name,
5097 struct nfs4_fs_locations *fs_locations,
5098 struct page *page)
db0a9593
BS		 5099{
5100 struct nfs4_exception exception = { };
5101 int err;
5102 do {
5103 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5104 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5105 &exception);
5106 } while (exception.retry);
5107 return err;
5108}
5109
5a5ea0d4
BS		 5110static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5111{
5112 int status;
5113 struct nfs4_secinfo_arg args = {
5114 .dir_fh = NFS_FH(dir),
5115 .name = name,
5116 };
5117 struct nfs4_secinfo_res res = {
5118 .flavors = flavors,
5119 };
5120 struct rpc_message msg = {
5121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5122 .rpc_argp = &args,
5123 .rpc_resp = &res,
5124 };
5125
5126 dprintk("NFS call secinfo %s\n", name->name);
5127 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5128 dprintk("NFS reply secinfo: %d\n", status);
5129 return status;
5130}
5131
72de53ec
BS		 5132int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5133 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5134{
5135 struct nfs4_exception exception = { };
5136 int err;
5137 do {
5138 err = nfs4_handle_exception(NFS_SERVER(dir),
5139 _nfs4_proc_secinfo(dir, name, flavors),
5140 &exception);
5141 } while (exception.retry);
5142 return err;
5143}
5144
557134a3 5145#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5146/*
5147 * Check the exchange flags returned by the server for invalid flags, having
5148 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5149 * DS flags set.
5150 */
5151static int nfs4_check_cl_exchange_flags(u32 flags)
5152{
5153 if (flags & ~EXCHGID4_FLAG_MASK_R)
5154 goto out_inval;
5155 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5156 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5157 goto out_inval;
5158 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5159 goto out_inval;
5160 return NFS_OK;
5161out_inval:
5162 return -NFS4ERR_INVAL;
5163}
5164
78fe0f41 5165static bool
79d4e1f0
CL		 5166nfs41_same_server_scope(struct nfs41_server_scope *a,
5167 struct nfs41_server_scope *b)
78fe0f41
WAA		 5168{
5169 if (a->server_scope_sz == b->server_scope_sz &&
5170 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5171 return true;
5172
5173 return false;
5174}
5175
7c44f1ae
WAA		 5176/*
5177 * nfs4_proc_bind_conn_to_session()
5178 *
5179 * The 4.1 client currently uses the same TCP connection for the
5180 * fore and backchannel.
5181 */
2cf047c9 5182int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5183{
5184 int status;
5185 struct nfs41_bind_conn_to_session_res res;
5186 struct rpc_message msg = {
5187 .rpc_proc =
5188 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5189 .rpc_argp = clp,
5190 .rpc_resp = &res,
2cf047c9 5191 .rpc_cred = cred,
7c44f1ae
WAA		 5192 };
5193
5194 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5195
5196 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5197 if (unlikely(res.session == NULL)) {
5198 status = -ENOMEM;
5199 goto out;
5200 }
5201
5202 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5203 if (status == 0) {
5204 if (memcmp(res.session->sess_id.data,
5205 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5206 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5207 status = -EIO;
5208 goto out_session;
5209 }
5210 if (res.dir != NFS4_CDFS4_BOTH) {
5211 dprintk("NFS: %s: Unexpected direction from server\n",
5212 __func__);
5213 status = -EIO;
5214 goto out_session;
5215 }
5216 if (res.use_conn_in_rdma_mode) {
5217 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5218 __func__);
5219 status = -EIO;
5220 goto out_session;
5221 }
5222 }
5223out_session:
5224 kfree(res.session);
5225out:
5226 dprintk("<-- %s status= %d\n", __func__, status);
5227 return status;
5228}
5229
99fe60d0
BH		 5230/*
5231 * nfs4_proc_exchange_id()
5232 *
6bbb4ae8
CL		 5233 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5234 *
99fe60d0
BH		 5235 * Since the clientid has expired, all compounds using sessions
5236 * associated with the stale clientid will be returning
5237 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5238 * be in some phase of session reset.
5239 */
4d643d1d 5240int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5241{
5242 nfs4_verifier verifier;
5243 struct nfs41_exchange_id_args args = {
cd93710e 5244 .verifier = &verifier,
99fe60d0 5245 .client = clp,
357f54d6 5246 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5247 };
5248 struct nfs41_exchange_id_res res = {
32b01310 5249 0
99fe60d0
BH		 5250 };
5251 int status;
5252 struct rpc_message msg = {
5253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5254 .rpc_argp = &args,
5255 .rpc_resp = &res,
5256 .rpc_cred = cred,
5257 };
99fe60d0 5258
f092075d 5259 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5260 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5261 sizeof(args.id));
6bbb4ae8
CL		 5262 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5263 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5264 args.id_len, args.id);
99fe60d0 5265
acdeb69d 5266 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5267 GFP_NOFS);
acdeb69d 5268 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5269 status = -ENOMEM;
5270 goto out;
5271 }
78fe0f41 5272
79d4e1f0 5273 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5274 GFP_NOFS);
177313f1 5275 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5276 status = -ENOMEM;
acdeb69d 5277 goto out_server_owner;
abe9a6d5 5278 }
78fe0f41 5279
bbafffd2 5280 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5281 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5282 status = -ENOMEM;
5283 goto out_server_scope;
5284 }
5285
1bd714f2 5286 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5287 if (status == 0)
32b01310 5288 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5289
acdeb69d 5290 if (status == 0) {
32b01310
TM		 5291 clp->cl_clientid = res.clientid;
5292 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5293 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5294 clp->cl_seqid = res.seqid;
5295
acdeb69d
CL		 5296 kfree(clp->cl_serverowner);
5297 clp->cl_serverowner = res.server_owner;
5298 res.server_owner = NULL;
78fe0f41 5299
7d2ed9ac 5300 /* use the most recent implementation id */
59155546
CL		 5301 kfree(clp->cl_implid);
5302 clp->cl_implid = res.impl_id;
7d2ed9ac 5303
177313f1 5304 if (clp->cl_serverscope != NULL &&
79d4e1f0 5305 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5306 res.server_scope)) {
5307 dprintk("%s: server_scope mismatch detected\n",
5308 __func__);
5309 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5310 kfree(clp->cl_serverscope);
5311 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5312 }
5313
177313f1 5314 if (clp->cl_serverscope == NULL) {
79d4e1f0 5315 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5316 goto out;
5317 }
32b01310
TM		 5318 } else
5319 kfree(res.impl_id);
7d2ed9ac 5320
acdeb69d
CL		 5321out_server_owner:
5322 kfree(res.server_owner);
7d2ed9ac 5323out_server_scope:
abe9a6d5
WAA		 5324 kfree(res.server_scope);
5325out:
177313f1 5326 if (clp->cl_implid != NULL)
6bbb4ae8 5327 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5328 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5329 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5330 clp->cl_implid->date.seconds,
5331 clp->cl_implid->date.nseconds);
6bbb4ae8 5332 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5333 return status;
5334}
5335
66245539
TM		 5336static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5337 struct rpc_cred *cred)
5338{
5339 struct rpc_message msg = {
5340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5341 .rpc_argp = clp,
5342 .rpc_cred = cred,
5343 };
5344 int status;
5345
5346 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5347 if (status)
02c67525 5348 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5349 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5350 return status;
5351}
5352
5353static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5354 struct rpc_cred *cred)
5355{
5356 unsigned int loop;
5357 int ret;
5358
5359 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5360 ret = _nfs4_proc_destroy_clientid(clp, cred);
5361 switch (ret) {
5362 case -NFS4ERR_DELAY:
5363 case -NFS4ERR_CLIENTID_BUSY:
5364 ssleep(1);
5365 break;
5366 default:
5367 return ret;
5368 }
5369 }
5370 return 0;
5371}
5372
5373int nfs4_destroy_clientid(struct nfs_client *clp)
5374{
5375 struct rpc_cred *cred;
5376 int ret = 0;
5377
5378 if (clp->cl_mvops->minor_version < 1)
5379 goto out;
5380 if (clp->cl_exchange_flags == 0)
5381 goto out;
05f4c350
CL		 5382 if (clp->cl_preserve_clid)
5383 goto out;
66245539
TM		 5384 cred = nfs4_get_exchange_id_cred(clp);
5385 ret = nfs4_proc_destroy_clientid(clp, cred);
5386 if (cred)
5387 put_rpccred(cred);
5388 switch (ret) {
5389 case 0:
5390 case -NFS4ERR_STALE_CLIENTID:
5391 clp->cl_exchange_flags = 0;
5392 }
5393out:
5394 return ret;
5395}
5396
2050f0cc
AA		 5397struct nfs4_get_lease_time_data {
5398 struct nfs4_get_lease_time_args *args;
5399 struct nfs4_get_lease_time_res *res;
5400 struct nfs_client *clp;
5401};
5402
5403static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5404 void *calldata)
5405{
2050f0cc
AA		 5406 struct nfs4_get_lease_time_data *data =
5407 (struct nfs4_get_lease_time_data *)calldata;
5408
5409 dprintk("--> %s\n", __func__);
5410 /* just setup sequence, do not trigger session recovery
5411 since we're invoked within one */
d9afbd1b
TM		 5412 nfs41_setup_sequence(data->clp->cl_session,
5413 &data->args->la_seq_args,
5414 &data->res->lr_seq_res,
5415 task);
2050f0cc
AA		 5416 dprintk("<-- %s\n", __func__);
5417}
5418
5419/*
5420 * Called from nfs4_state_manager thread for session setup, so don't recover
5421 * from sequence operation or clientid errors.
5422 */
5423static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5424{
5425 struct nfs4_get_lease_time_data *data =
5426 (struct nfs4_get_lease_time_data *)calldata;
5427
5428 dprintk("--> %s\n", __func__);
14516c3a
TM		 5429 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5430 return;
2050f0cc
AA		 5431 switch (task->tk_status) {
5432 case -NFS4ERR_DELAY:
5433 case -NFS4ERR_GRACE:
5434 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5435 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5436 task->tk_status = 0;
a8a4ae3a
AA		 5437 /* fall through */
5438 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5439 rpc_restart_call_prepare(task);
2050f0cc
AA		 5440 return;
5441 }
2050f0cc
AA		 5442 dprintk("<-- %s\n", __func__);
5443}
5444
17280175 5445static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5446 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5447 .rpc_call_done = nfs4_get_lease_time_done,
5448};
5449
5450int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5451{
5452 struct rpc_task *task;
5453 struct nfs4_get_lease_time_args args;
5454 struct nfs4_get_lease_time_res res = {
5455 .lr_fsinfo = fsinfo,
5456 };
5457 struct nfs4_get_lease_time_data data = {
5458 .args = &args,
5459 .res = &res,
5460 .clp = clp,
5461 };
5462 struct rpc_message msg = {
5463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5464 .rpc_argp = &args,
5465 .rpc_resp = &res,
5466 };
5467 struct rpc_task_setup task_setup = {
5468 .rpc_client = clp->cl_rpcclient,
5469 .rpc_message = &msg,
5470 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5471 .callback_data = &data,
5472 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5473 };
5474 int status;
5475
9d12b216 5476 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5477 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5478 dprintk("--> %s\n", __func__);
5479 task = rpc_run_task(&task_setup);
5480
5481 if (IS_ERR(task))
5482 status = PTR_ERR(task);
5483 else {
5484 status = task->tk_status;
5485 rpc_put_task(task);
5486 }
5487 dprintk("<-- %s return %d\n", __func__, status);
5488
5489 return status;
5490}
5491
fc931582
AA		 5492/*
5493 * Initialize the values to be used by the client in CREATE_SESSION
5494 * If nfs4_init_session set the fore channel request and response sizes,
5495 * use them.
5496 *
5497 * Set the back channel max_resp_sz_cached to zero to force the client to
5498 * always set csa_cachethis to FALSE because the current implementation
5499 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5500 */
5501static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5502{
5503 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5504 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5505 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5506
5507 if (mxrqst_sz == 0)
5508 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5509 if (mxresp_sz == 0)
5510 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5511 /* Fore channel attributes */
fc931582
AA		 5512 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5513 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5514 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5515 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5516
5517 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5518 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5519 __func__,
5520 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5521 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5522
5523 /* Back channel attributes */
fc931582
AA		 5524 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5525 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5526 args->bc_attrs.max_resp_sz_cached = 0;
5527 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5528 args->bc_attrs.max_reqs = 1;
5529
5530 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5531 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5532 __func__,
5533 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5534 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5535 args->bc_attrs.max_reqs);
5536}
5537
43c2e885 5538static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5539{
43c2e885
BF		 5540 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5541 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5542
43c2e885
BF		 5543 if (rcvd->max_resp_sz > sent->max_resp_sz)
5544 return -EINVAL;
5545 /*
5546 * Our requested max_ops is the minimum we need; we're not
5547 * prepared to break up compounds into smaller pieces than that.
5548 * So, no point even trying to continue if the server won't
5549 * cooperate:
5550 */
5551 if (rcvd->max_ops < sent->max_ops)
5552 return -EINVAL;
5553 if (rcvd->max_reqs == 0)
5554 return -EINVAL;
b4b9a0c1
VG		 5555 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5556 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5557 return 0;
8d35301d
AA		 5558}
5559
43c2e885
BF		 5560static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5561{
5562 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5563 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5564
43c2e885
BF		 5565 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5566 return -EINVAL;
5567 if (rcvd->max_resp_sz < sent->max_resp_sz)
5568 return -EINVAL;
5569 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5570 return -EINVAL;
5571 /* These would render the backchannel useless: */
b4b9a0c1 5572 if (rcvd->max_ops != sent->max_ops)
43c2e885 5573 return -EINVAL;
b4b9a0c1 5574 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5575 return -EINVAL;
5576 return 0;
5577}
8d35301d 5578
8d35301d
AA		 5579static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5580 struct nfs4_session *session)
5581{
43c2e885 5582 int ret;
8d35301d 5583
43c2e885
BF		 5584 ret = nfs4_verify_fore_channel_attrs(args, session);
5585 if (ret)
5586 return ret;
5587 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5588}
5589
848f5bda
TM		 5590static int _nfs4_proc_create_session(struct nfs_client *clp,
5591 struct rpc_cred *cred)
fc931582
AA		 5592{
5593 struct nfs4_session *session = clp->cl_session;
5594 struct nfs41_create_session_args args = {
5595 .client = clp,
5596 .cb_program = NFS4_CALLBACK,
5597 };
5598 struct nfs41_create_session_res res = {
5599 .client = clp,
5600 };
5601 struct rpc_message msg = {
5602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5603 .rpc_argp = &args,
5604 .rpc_resp = &res,
848f5bda 5605 .rpc_cred = cred,
fc931582
AA		 5606 };
5607 int status;
5608
5609 nfs4_init_channel_attrs(&args);
0f91421e 5610 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5611
1bd714f2 5612 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5613
43095d39 5614 if (!status) {
8d35301d
AA		 5615 /* Verify the session's negotiated channel_attrs values */
5616 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5617 /* Increment the clientid slot sequence id */
5618 clp->cl_seqid++;
5619 }
5620
5621 return status;
5622}
5623
5624/*
5625 * Issues a CREATE_SESSION operation to the server.
5626 * It is the responsibility of the caller to verify the session is
5627 * expired before calling this routine.
5628 */
848f5bda 5629int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5630{
5631 int status;
5632 unsigned *ptr;
fc931582
AA		 5633 struct nfs4_session *session = clp->cl_session;
5634
5635 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5636
848f5bda 5637 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5638 if (status)
5639 goto out;
5640
aacd5537
AA		 5641 /* Init or reset the session slot tables */
5642 status = nfs4_setup_session_slot_tables(session);
5643 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5644 if (status)
5645 goto out;
5646
5647 ptr = (unsigned *)&session->sess_id.data[0];
5648 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5649 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5650out:
5651 dprintk("<-- %s\n", __func__);
5652 return status;
5653}
5654
0f3e66c6
AA		 5655/*
5656 * Issue the over-the-wire RPC DESTROY_SESSION.
5657 * The caller must serialize access to this routine.
5658 */
848f5bda
TM		 5659int nfs4_proc_destroy_session(struct nfs4_session *session,
5660 struct rpc_cred *cred)
0f3e66c6 5661{
848f5bda
TM		 5662 struct rpc_message msg = {
5663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5664 .rpc_argp = session,
5665 .rpc_cred = cred,
5666 };
0f3e66c6 5667 int status = 0;
0f3e66c6
AA		 5668
5669 dprintk("--> nfs4_proc_destroy_session\n");
5670
5671 /* session is still being setup */
5672 if (session->clp->cl_cons_state != NFS_CS_READY)
5673 return status;
5674
1bd714f2 5675 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5676
5677 if (status)
08106ac7 5678 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5679 "Session has been destroyed regardless...\n", status);
5680
5681 dprintk("<-- nfs4_proc_destroy_session\n");
5682 return status;
5683}
5684
fc01cea9
AA		 5685/*
5686 * Renew the cl_session lease.
5687 */
d5f8d3fe
TM		 5688struct nfs4_sequence_data {
5689 struct nfs_client *clp;
5690 struct nfs4_sequence_args args;
5691 struct nfs4_sequence_res res;
5692};
5693
dc96aef9
AB		 5694static void nfs41_sequence_release(void *data)
5695{
d5f8d3fe
TM		 5696 struct nfs4_sequence_data *calldata = data;
5697 struct nfs_client *clp = calldata->clp;
dc96aef9 5698
7135840f
AB		 5699 if (atomic_read(&clp->cl_count) > 1)
5700 nfs4_schedule_state_renewal(clp);
5701 nfs_put_client(clp);
d5f8d3fe 5702 kfree(calldata);
dc96aef9
AB		 5703}
5704
aa5190d0
TM		 5705static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5706{
5707 switch(task->tk_status) {
5708 case -NFS4ERR_DELAY:
aa5190d0
TM		 5709 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5710 return -EAGAIN;
5711 default:
0400a6b0 5712 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5713 }
5714 return 0;
5715}
5716
dc96aef9 5717static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5718{
d5f8d3fe
TM		 5719 struct nfs4_sequence_data *calldata = data;
5720 struct nfs_client *clp = calldata->clp;
fc01cea9 5721
14516c3a
TM		 5722 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5723 return;
fc01cea9
AA		 5724
5725 if (task->tk_status < 0) {
5726 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5727 if (atomic_read(&clp->cl_count) == 1)
5728 goto out;
fc01cea9 5729
aa5190d0
TM		 5730 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5731 rpc_restart_call_prepare(task);
fc01cea9
AA		 5732 return;
5733 }
5734 }
fc01cea9 5735 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5736out:
fc01cea9
AA		 5737 dprintk("<-- %s\n", __func__);
5738}
5739
5740static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5741{
d5f8d3fe
TM		 5742 struct nfs4_sequence_data *calldata = data;
5743 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5744 struct nfs4_sequence_args *args;
5745 struct nfs4_sequence_res *res;
5746
fc01cea9
AA		 5747 args = task->tk_msg.rpc_argp;
5748 res = task->tk_msg.rpc_resp;
5749
d9afbd1b 5750 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5751}
5752
5753static const struct rpc_call_ops nfs41_sequence_ops = {
5754 .rpc_call_done = nfs41_sequence_call_done,
5755 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5756 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5757};
5758
8fe72bac
TM		 5759static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5760 struct rpc_cred *cred,
5761 bool is_privileged)
fc01cea9 5762{
d5f8d3fe 5763 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5764 struct rpc_message msg = {
5765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5766 .rpc_cred = cred,
5767 };
71ac6da9
TM		 5768 struct rpc_task_setup task_setup_data = {
5769 .rpc_client = clp->cl_rpcclient,
5770 .rpc_message = &msg,
8fe72bac 5771 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5772 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5773 };
fc01cea9 5774
7135840f 5775 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5776 return ERR_PTR(-EIO);
dfb4f309 5777 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5778 if (calldata == NULL) {
7135840f 5779 nfs_put_client(clp);
71ac6da9 5780 return ERR_PTR(-ENOMEM);
fc01cea9 5781 }
9d12b216 5782 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5783 if (is_privileged)
5784 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5785 msg.rpc_argp = &calldata->args;
5786 msg.rpc_resp = &calldata->res;
5787 calldata->clp = clp;
71ac6da9 5788 task_setup_data.callback_data = calldata;
fc01cea9 5789
71ac6da9
TM		 5790 return rpc_run_task(&task_setup_data);
5791}
5792
2f60ea6b 5793static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5794{
5795 struct rpc_task *task;
5796 int ret = 0;
5797
2f60ea6b
TM		 5798 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5799 return 0;
8fe72bac 5800 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5801 if (IS_ERR(task))
5802 ret = PTR_ERR(task);
5803 else
bf294b41 5804 rpc_put_task_async(task);
71ac6da9
TM		 5805 dprintk("<-- %s status=%d\n", __func__, ret);
5806 return ret;
5807}
5808
5809static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5810{
5811 struct rpc_task *task;
5812 int ret;
5813
8fe72bac 5814 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5815 if (IS_ERR(task)) {
5816 ret = PTR_ERR(task);
5817 goto out;
5818 }
5819 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5820 if (!ret) {
5821 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5822
5823 if (task->tk_status == 0)
5824 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5825 ret = task->tk_status;
b4410c2f 5826 }
71ac6da9
TM		 5827 rpc_put_task(task);
5828out:
5829 dprintk("<-- %s status=%d\n", __func__, ret);
5830 return ret;
fc01cea9
AA		 5831}
5832
fce5c838
RL		 5833struct nfs4_reclaim_complete_data {
5834 struct nfs_client *clp;
5835 struct nfs41_reclaim_complete_args arg;
5836 struct nfs41_reclaim_complete_res res;
5837};
5838
5839static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5840{
5841 struct nfs4_reclaim_complete_data *calldata = data;
5842
d9afbd1b
TM		 5843 nfs41_setup_sequence(calldata->clp->cl_session,
5844 &calldata->arg.seq_args,
5845 &calldata->res.seq_res,
5846 task);
fce5c838
RL		 5847}
5848
aa5190d0
TM		 5849static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5850{
5851 switch(task->tk_status) {
5852 case 0:
5853 case -NFS4ERR_COMPLETE_ALREADY:
5854 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5855 break;
5856 case -NFS4ERR_DELAY:
aa5190d0 5857 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5858 /* fall through */
5859 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5860 return -EAGAIN;
5861 default:
0400a6b0 5862 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5863 }
5864 return 0;
5865}
5866
fce5c838
RL		 5867static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5868{
5869 struct nfs4_reclaim_complete_data *calldata = data;
5870 struct nfs_client *clp = calldata->clp;
5871 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5872
5873 dprintk("--> %s\n", __func__);
14516c3a
TM		 5874 if (!nfs41_sequence_done(task, res))
5875 return;
fce5c838 5876
aa5190d0
TM		 5877 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5878 rpc_restart_call_prepare(task);
5879 return;
5880 }
fce5c838
RL		 5881 dprintk("<-- %s\n", __func__);
5882}
5883
5884static void nfs4_free_reclaim_complete_data(void *data)
5885{
5886 struct nfs4_reclaim_complete_data *calldata = data;
5887
5888 kfree(calldata);
5889}
5890
5891static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5892 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5893 .rpc_call_done = nfs4_reclaim_complete_done,
5894 .rpc_release = nfs4_free_reclaim_complete_data,
5895};
5896
5897/*
5898 * Issue a global reclaim complete.
5899 */
5900static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5901{
5902 struct nfs4_reclaim_complete_data *calldata;
5903 struct rpc_task *task;
5904 struct rpc_message msg = {
5905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5906 };
5907 struct rpc_task_setup task_setup_data = {
5908 .rpc_client = clp->cl_rpcclient,
5909 .rpc_message = &msg,
5910 .callback_ops = &nfs4_reclaim_complete_call_ops,
5911 .flags = RPC_TASK_ASYNC,
5912 };
5913 int status = -ENOMEM;
5914
5915 dprintk("--> %s\n", __func__);
8535b2be 5916 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5917 if (calldata == NULL)
5918 goto out;
5919 calldata->clp = clp;
5920 calldata->arg.one_fs = 0;
fce5c838 5921
9d12b216 5922 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5923 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5924 msg.rpc_argp = &calldata->arg;
5925 msg.rpc_resp = &calldata->res;
5926 task_setup_data.callback_data = calldata;
5927 task = rpc_run_task(&task_setup_data);
acf82b85 5928 if (IS_ERR(task)) {
fce5c838 5929 status = PTR_ERR(task);
acf82b85
DC		 5930 goto out;
5931 }
c34c32ea
AA		 5932 status = nfs4_wait_for_completion_rpc_task(task);
5933 if (status == 0)
5934 status = task->tk_status;
fce5c838 5935 rpc_put_task(task);
acf82b85 5936 return 0;
fce5c838
RL		 5937out:
5938 dprintk("<-- %s status=%d\n", __func__, status);
5939 return status;
5940}
b1f69b75
AA		 5941
5942static void
5943nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5944{
5945 struct nfs4_layoutget *lgp = calldata;
c31663d4 5946 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 5947 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 5948
5949 dprintk("--> %s\n", __func__);
c31663d4
FI		 5950 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5951 * right now covering the LAYOUTGET we are about to send.
5952 * However, that is not so catastrophic, and there seems
5953 * to be no way to prevent it completely.
5954 */
6ba7db34 5955 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 5956 &lgp->res.seq_res, task))
b1f69b75 5957 return;
cf7d63f1
FI		 5958 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5959 NFS_I(lgp->args.inode)->layout,
5960 lgp->args.ctx->state)) {
5961 rpc_exit(task, NFS4_OK);
cf7d63f1 5962 }
b1f69b75
AA		 5963}
5964
5965static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5966{
5967 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 5968 struct inode *inode = lgp->args.inode;
5969 struct nfs_server *server = NFS_SERVER(inode);
5970 struct pnfs_layout_hdr *lo;
5971 struct nfs4_state *state = NULL;
b1f69b75
AA		 5972
5973 dprintk("--> %s\n", __func__);
5974
6ba7db34 5975 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 5976 goto out;
b1f69b75
AA		 5977
5978 switch (task->tk_status) {
5979 case 0:
ee314c2a 5980 goto out;
b1f69b75
AA		 5981 case -NFS4ERR_LAYOUTTRYLATER:
5982 case -NFS4ERR_RECALLCONFLICT:
5983 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 5984 break;
5985 case -NFS4ERR_EXPIRED:
5986 case -NFS4ERR_BAD_STATEID:
5987 spin_lock(&inode->i_lock);
5988 lo = NFS_I(inode)->layout;
5989 if (!lo || list_empty(&lo->plh_segs)) {
5990 spin_unlock(&inode->i_lock);
5991 /* If the open stateid was bad, then recover it. */
5992 state = lgp->args.ctx->state;
5993 } else {
5994 LIST_HEAD(head);
5995
5996 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
5997 spin_unlock(&inode->i_lock);
5998 /* Mark the bad layout state as invalid, then
5999 * retry using the open stateid. */
6000 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6001 }
6002 }
ee314c2a
TM		 6003 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6004 rpc_restart_call_prepare(task);
6005out:
b1f69b75
AA		 6006 dprintk("<-- %s\n", __func__);
6007}
6008
8554116e
IK		 6009static size_t max_response_pages(struct nfs_server *server)
6010{
6011 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6012 return nfs_page_array_len(0, max_resp_sz);
6013}
6014
6015static void nfs4_free_pages(struct page **pages, size_t size)
6016{
6017 int i;
6018
6019 if (!pages)
6020 return;
6021
6022 for (i = 0; i < size; i++) {
6023 if (!pages[i])
6024 break;
6025 __free_page(pages[i]);
6026 }
6027 kfree(pages);
6028}
6029
6030static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6031{
6032 struct page **pages;
6033 int i;
6034
6035 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6036 if (!pages) {
6037 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6038 return NULL;
6039 }
6040
6041 for (i = 0; i < size; i++) {
6042 pages[i] = alloc_page(gfp_flags);
6043 if (!pages[i]) {
6044 dprintk("%s: failed to allocate page\n", __func__);
6045 nfs4_free_pages(pages, size);
6046 return NULL;
6047 }
6048 }
6049
6050 return pages;
6051}
6052
b1f69b75
AA		 6053static void nfs4_layoutget_release(void *calldata)
6054{
6055 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6056 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6057 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6058
6059 dprintk("--> %s\n", __func__);
8554116e 6060 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6061 put_nfs_open_context(lgp->args.ctx);
6062 kfree(calldata);
6063 dprintk("<-- %s\n", __func__);
6064}
6065
6066static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6067 .rpc_call_prepare = nfs4_layoutget_prepare,
6068 .rpc_call_done = nfs4_layoutget_done,
6069 .rpc_release = nfs4_layoutget_release,
6070};
6071
a0b0a6e3
TM		 6072struct pnfs_layout_segment *
6073nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6074{
6075 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6076 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6077 struct rpc_task *task;
6078 struct rpc_message msg = {
6079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6080 .rpc_argp = &lgp->args,
6081 .rpc_resp = &lgp->res,
6082 };
6083 struct rpc_task_setup task_setup_data = {
6084 .rpc_client = server->client,
6085 .rpc_message = &msg,
6086 .callback_ops = &nfs4_layoutget_call_ops,
6087 .callback_data = lgp,
6088 .flags = RPC_TASK_ASYNC,
6089 };
a0b0a6e3 6090 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6091 int status = 0;
6092
6093 dprintk("--> %s\n", __func__);
6094
8554116e
IK		 6095 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6096 if (!lgp->args.layout.pages) {
6097 nfs4_layoutget_release(lgp);
a0b0a6e3 6098 return ERR_PTR(-ENOMEM);
8554116e
IK		 6099 }
6100 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6101
35124a09 6102 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6103 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6104 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6105 task = rpc_run_task(&task_setup_data);
6106 if (IS_ERR(task))
a0b0a6e3 6107 return ERR_CAST(task);
b1f69b75 6108 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6109 if (status == 0)
6110 status = task->tk_status;
6111 if (status == 0)
a0b0a6e3 6112 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6113 rpc_put_task(task);
6114 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6115 if (status)
6116 return ERR_PTR(status);
6117 return lseg;
b1f69b75
AA		 6118}
6119
cbe82603
BH		 6120static void
6121nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6122{
6123 struct nfs4_layoutreturn *lrp = calldata;
6124
6125 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6126 nfs41_setup_sequence(lrp->clp->cl_session,
6127 &lrp->args.seq_args,
6128 &lrp->res.seq_res,
6129 task);
cbe82603
BH		 6130}
6131
6132static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6133{
6134 struct nfs4_layoutreturn *lrp = calldata;
6135 struct nfs_server *server;
6136
6137 dprintk("--> %s\n", __func__);
6138
6ba7db34 6139 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6140 return;
6141
6142 server = NFS_SERVER(lrp->args.inode);
6143 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6144 rpc_restart_call_prepare(task);
cbe82603
BH		 6145 return;
6146 }
cbe82603
BH		 6147 dprintk("<-- %s\n", __func__);
6148}
6149
6150static void nfs4_layoutreturn_release(void *calldata)
6151{
6152 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6153 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6154
6155 dprintk("--> %s\n", __func__);
849b286f
TM		 6156 spin_lock(&lo->plh_inode->i_lock);
6157 if (lrp->res.lrs_present)
6158 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6159 lo->plh_block_lgets--;
6160 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6161 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6162 kfree(calldata);
6163 dprintk("<-- %s\n", __func__);
6164}
6165
6166static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6167 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6168 .rpc_call_done = nfs4_layoutreturn_done,
6169 .rpc_release = nfs4_layoutreturn_release,
6170};
6171
6172int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6173{
6174 struct rpc_task *task;
6175 struct rpc_message msg = {
6176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6177 .rpc_argp = &lrp->args,
6178 .rpc_resp = &lrp->res,
6179 };
6180 struct rpc_task_setup task_setup_data = {
6181 .rpc_client = lrp->clp->cl_rpcclient,
6182 .rpc_message = &msg,
6183 .callback_ops = &nfs4_layoutreturn_call_ops,
6184 .callback_data = lrp,
6185 };
6186 int status;
6187
6188 dprintk("--> %s\n", __func__);
9d12b216 6189 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6190 task = rpc_run_task(&task_setup_data);
6191 if (IS_ERR(task))
6192 return PTR_ERR(task);
6193 status = task->tk_status;
6194 dprintk("<-- %s status=%d\n", __func__, status);
6195 rpc_put_task(task);
6196 return status;
6197}
6198
7f11d8d3
AA		 6199/*
6200 * Retrieve the list of Data Server devices from the MDS.
6201 */
6202static int _nfs4_getdevicelist(struct nfs_server *server,
6203 const struct nfs_fh *fh,
6204 struct pnfs_devicelist *devlist)
6205{
6206 struct nfs4_getdevicelist_args args = {
6207 .fh = fh,
6208 .layoutclass = server->pnfs_curr_ld->id,
6209 };
6210 struct nfs4_getdevicelist_res res = {
6211 .devlist = devlist,
6212 };
6213 struct rpc_message msg = {
6214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6215 .rpc_argp = &args,
6216 .rpc_resp = &res,
6217 };
6218 int status;
6219
6220 dprintk("--> %s\n", __func__);
6221 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6222 &res.seq_res, 0);
6223 dprintk("<-- %s status=%d\n", __func__, status);
6224 return status;
6225}
6226
6227int nfs4_proc_getdevicelist(struct nfs_server *server,
6228 const struct nfs_fh *fh,
6229 struct pnfs_devicelist *devlist)
6230{
6231 struct nfs4_exception exception = { };
6232 int err;
6233
6234 do {
6235 err = nfs4_handle_exception(server,
6236 _nfs4_getdevicelist(server, fh, devlist),
6237 &exception);
6238 } while (exception.retry);
6239
6240 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6241 err, devlist->num_devs);
6242
6243 return err;
6244}
6245EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6246
b1f69b75
AA		 6247static int
6248_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6249{
6250 struct nfs4_getdeviceinfo_args args = {
6251 .pdev = pdev,
6252 };
6253 struct nfs4_getdeviceinfo_res res = {
6254 .pdev = pdev,
6255 };
6256 struct rpc_message msg = {
6257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6258 .rpc_argp = &args,
6259 .rpc_resp = &res,
6260 };
6261 int status;
6262
6263 dprintk("--> %s\n", __func__);
7c513058 6264 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6265 dprintk("<-- %s status=%d\n", __func__, status);
6266
6267 return status;
6268}
6269
6270int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6271{
6272 struct nfs4_exception exception = { };
6273 int err;
6274
6275 do {
6276 err = nfs4_handle_exception(server,
6277 _nfs4_proc_getdeviceinfo(server, pdev),
6278 &exception);
6279 } while (exception.retry);
6280 return err;
6281}
6282EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6283
863a3c6c
AA		 6284static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6285{
6286 struct nfs4_layoutcommit_data *data = calldata;
6287 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6288 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6289
d9afbd1b
TM		 6290 nfs41_setup_sequence(session,
6291 &data->args.seq_args,
6292 &data->res.seq_res,
6293 task);
863a3c6c
AA		 6294}
6295
6296static void
6297nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6298{
6299 struct nfs4_layoutcommit_data *data = calldata;
6300 struct nfs_server *server = NFS_SERVER(data->args.inode);
6301
6ba7db34 6302 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6303 return;
6304
6305 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6306 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6307 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6308 case -NFS4ERR_BADLAYOUT: /* no layout */
6309 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6310 task->tk_status = 0;
e59d27e0
TM		 6311 break;
6312 case 0:
863a3c6c
AA		 6313 nfs_post_op_update_inode_force_wcc(data->args.inode,
6314 data->res.fattr);
e59d27e0
TM		 6315 break;
6316 default:
6317 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6318 rpc_restart_call_prepare(task);
6319 return;
6320 }
6321 }
863a3c6c
AA		 6322}
6323
6324static void nfs4_layoutcommit_release(void *calldata)
6325{
6326 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6327 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6328 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6329
db29c089 6330 pnfs_cleanup_layoutcommit(data);
863a3c6c 6331 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6332 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6333 list_del_init(&lseg->pls_lc_list);
6334 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6335 &lseg->pls_flags))
9369a431 6336 pnfs_put_lseg(lseg);
a9bae566 6337 }
92407e75
PT		 6338
6339 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6340 smp_mb__after_clear_bit();
6341 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6342
863a3c6c
AA		 6343 put_rpccred(data->cred);
6344 kfree(data);
6345}
6346
6347static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6348 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6349 .rpc_call_done = nfs4_layoutcommit_done,
6350 .rpc_release = nfs4_layoutcommit_release,
6351};
6352
6353int
ef311537 6354nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6355{
6356 struct rpc_message msg = {
6357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6358 .rpc_argp = &data->args,
6359 .rpc_resp = &data->res,
6360 .rpc_cred = data->cred,
6361 };
6362 struct rpc_task_setup task_setup_data = {
6363 .task = &data->task,
6364 .rpc_client = NFS_CLIENT(data->args.inode),
6365 .rpc_message = &msg,
6366 .callback_ops = &nfs4_layoutcommit_ops,
6367 .callback_data = data,
6368 .flags = RPC_TASK_ASYNC,
6369 };
6370 struct rpc_task *task;
6371 int status = 0;
6372
6373 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6374 "lbw: %llu inode %lu\n",
6375 data->task.tk_pid, sync,
6376 data->args.lastbytewritten,
6377 data->args.inode->i_ino);
6378
9d12b216 6379 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6380 task = rpc_run_task(&task_setup_data);
6381 if (IS_ERR(task))
6382 return PTR_ERR(task);
ef311537 6383 if (sync == false)
863a3c6c
AA		 6384 goto out;
6385 status = nfs4_wait_for_completion_rpc_task(task);
6386 if (status != 0)
6387 goto out;
6388 status = task->tk_status;
6389out:
6390 dprintk("%s: status %d\n", __func__, status);
6391 rpc_put_task(task);
6392 return status;
6393}
fca78d6d
BS		 6394
6395static int
6396_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6397 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6398{
6399 struct nfs41_secinfo_no_name_args args = {
6400 .style = SECINFO_STYLE_CURRENT_FH,
6401 };
6402 struct nfs4_secinfo_res res = {
6403 .flavors = flavors,
6404 };
6405 struct rpc_message msg = {
6406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6407 .rpc_argp = &args,
6408 .rpc_resp = &res,
6409 };
6410 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6411}
6412
6413static int
6414nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6415 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6416{
6417 struct nfs4_exception exception = { };
6418 int err;
6419 do {
6420 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6421 switch (err) {
6422 case 0:
6423 case -NFS4ERR_WRONGSEC:
6424 case -NFS4ERR_NOTSUPP:
05e9cfb4 6425 goto out;
fca78d6d
BS		 6426 default:
6427 err = nfs4_handle_exception(server, err, &exception);
6428 }
6429 } while (exception.retry);
05e9cfb4 6430out:
fca78d6d
BS		 6431 return err;
6432}
6433
6434static int
6435nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6436 struct nfs_fsinfo *info)
6437{
6438 int err;
6439 struct page *page;
6440 rpc_authflavor_t flavor;
6441 struct nfs4_secinfo_flavors *flavors;
6442
6443 page = alloc_page(GFP_KERNEL);
6444 if (!page) {
6445 err = -ENOMEM;
6446 goto out;
6447 }
6448
6449 flavors = page_address(page);
6450 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6451
6452 /*
6453 * Fall back on "guess and check" method if
6454 * the server doesn't support SECINFO_NO_NAME
6455 */
6456 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6457 err = nfs4_find_root_sec(server, fhandle, info);
6458 goto out_freepage;
6459 }
6460 if (err)
6461 goto out_freepage;
6462
6463 flavor = nfs_find_best_sec(flavors);
6464 if (err == 0)
6465 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6466
6467out_freepage:
6468 put_page(page);
6469 if (err == -EACCES)
6470 return -EPERM;
6471out:
6472 return err;
6473}
1cab0652
BS		 6474
6475static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6476{
6477 int status;
6478 struct nfs41_test_stateid_args args = {
1cab0652 6479 .stateid = stateid,
7d974794
BS		 6480 };
6481 struct nfs41_test_stateid_res res;
6482 struct rpc_message msg = {
6483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6484 .rpc_argp = &args,
6485 .rpc_resp = &res,
6486 };
1cab0652 6487
38527b15 6488 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6489 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6490 nfs4_set_sequence_privileged(&args.seq_args);
6491 status = nfs4_call_sync_sequence(server->client, server, &msg,
6492 &args.seq_args, &res.seq_res);
38527b15
CL		 6493 if (status != NFS_OK) {
6494 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6495 return status;
38527b15
CL		 6496 }
6497 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6498 return -res.status;
7d974794
BS		 6499}
6500
38527b15
CL		 6501/**
6502 * nfs41_test_stateid - perform a TEST_STATEID operation
6503 *
6504 * @server: server / transport on which to perform the operation
6505 * @stateid: state ID to test
6506 *
6507 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6508 * Otherwise a negative NFS4ERR value is returned if the operation
6509 * failed or the state ID is not currently valid.
6510 */
1cab0652 6511static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6512{
6513 struct nfs4_exception exception = { };
6514 int err;
6515 do {
377e507d
CL		 6516 err = _nfs41_test_stateid(server, stateid);
6517 if (err != -NFS4ERR_DELAY)
6518 break;
6519 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6520 } while (exception.retry);
6521 return err;
6522}
9aeda35f 6523
1cab0652 6524static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6525{
9aeda35f 6526 struct nfs41_free_stateid_args args = {
1cab0652 6527 .stateid = stateid,
9aeda35f
BS		 6528 };
6529 struct nfs41_free_stateid_res res;
6530 struct rpc_message msg = {
6531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6532 .rpc_argp = &args,
6533 .rpc_resp = &res,
6534 };
38527b15 6535 int status;
9aeda35f 6536
38527b15 6537 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6538 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6539 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6540 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6541 &args.seq_args, &res.seq_res);
38527b15
CL		 6542 dprintk("NFS reply free_stateid: %d\n", status);
6543 return status;
9aeda35f
BS		 6544}
6545
38527b15
CL		 6546/**
6547 * nfs41_free_stateid - perform a FREE_STATEID operation
6548 *
6549 * @server: server / transport on which to perform the operation
6550 * @stateid: state ID to release
6551 *
6552 * Returns NFS_OK if the server freed "stateid". Otherwise a
6553 * negative NFS4ERR value is returned.
6554 */
1cab0652 6555static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6556{
6557 struct nfs4_exception exception = { };
6558 int err;
6559 do {
377e507d
CL		 6560 err = _nfs4_free_stateid(server, stateid);
6561 if (err != -NFS4ERR_DELAY)
6562 break;
6563 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6564 } while (exception.retry);
6565 return err;
6566}
36281caa
TM		 6567
6568static bool nfs41_match_stateid(const nfs4_stateid *s1,
6569 const nfs4_stateid *s2)
6570{
2d2f24ad 6571 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6572 return false;
6573
2d2f24ad 6574 if (s1->seqid == s2->seqid)
36281caa 6575 return true;
2d2f24ad 6576 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6577 return true;
6578
6579 return false;
6580}
6581
557134a3
AA		 6582#endif /* CONFIG_NFS_V4_1 */
6583
36281caa
TM		 6584static bool nfs4_match_stateid(const nfs4_stateid *s1,
6585 const nfs4_stateid *s2)
6586{
f597c537 6587 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6588}
6589
6590
17280175 6591static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6592 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6593 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6594 .recover_open = nfs4_open_reclaim,
6595 .recover_lock = nfs4_lock_reclaim,
591d71cb 6596 .establish_clid = nfs4_init_clientid,
90a16617 6597 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6598 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6599};
6600
591d71cb 6601#if defined(CONFIG_NFS_V4_1)
17280175 6602static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6603 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6604 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6605 .recover_open = nfs4_open_reclaim,
6606 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6607 .establish_clid = nfs41_init_clientid,
b4b82607 6608 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6609 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6610 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6611};
6612#endif /* CONFIG_NFS_V4_1 */
6613
17280175 6614static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6615 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6616 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6617 .recover_open = nfs4_open_expired,
6618 .recover_lock = nfs4_lock_expired,
6619 .establish_clid = nfs4_init_clientid,
90a16617 6620 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6621};
6622
6623#if defined(CONFIG_NFS_V4_1)
17280175 6624static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6625 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6626 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6627 .recover_open = nfs41_open_expired,
6628 .recover_lock = nfs41_lock_expired,
4d643d1d 6629 .establish_clid = nfs41_init_clientid,
b4b82607 6630 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6631};
591d71cb 6632#endif /* CONFIG_NFS_V4_1 */
1da177e4 6633
17280175 6634static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6635 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6636 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6637 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6638};
6639
6640#if defined(CONFIG_NFS_V4_1)
17280175 6641static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6642 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6643 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6644 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6645};
6646#endif
6647
97dc1359
TM		 6648static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6649 .minor_version = 0,
6650 .call_sync = _nfs4_call_sync,
36281caa 6651 .match_stateid = nfs4_match_stateid,
fca78d6d 6652 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6653 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6654 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6655 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6656};
6657
6658#if defined(CONFIG_NFS_V4_1)
6659static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6660 .minor_version = 1,
104287cd 6661 .call_sync = nfs4_call_sync_sequence,
36281caa 6662 .match_stateid = nfs41_match_stateid,
fca78d6d 6663 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6664 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6665 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6666 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6667};
6668#endif
6669
97dc1359
TM		 6670const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6671 [0] = &nfs_v4_0_minor_ops,
6672#if defined(CONFIG_NFS_V4_1)
6673 [1] = &nfs_v4_1_minor_ops,
6674#endif
6675};
6676
73a79706
BS		 6677const struct inode_operations nfs4_dir_inode_operations = {
6678 .create = nfs_create,
6679 .lookup = nfs_lookup,
6680 .atomic_open = nfs_atomic_open,
6681 .link = nfs_link,
6682 .unlink = nfs_unlink,
6683 .symlink = nfs_symlink,
6684 .mkdir = nfs_mkdir,
6685 .rmdir = nfs_rmdir,
6686 .mknod = nfs_mknod,
6687 .rename = nfs_rename,
6688 .permission = nfs_permission,
6689 .getattr = nfs_getattr,
6690 .setattr = nfs_setattr,
6691 .getxattr = generic_getxattr,
6692 .setxattr = generic_setxattr,
6693 .listxattr = generic_listxattr,
6694 .removexattr = generic_removexattr,
6695};
6696
92e1d5be 6697static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6698 .permission = nfs_permission,
6699 .getattr = nfs_getattr,
6700 .setattr = nfs_setattr,
64c2ce8b
AK		 6701 .getxattr = generic_getxattr,
6702 .setxattr = generic_setxattr,
6703 .listxattr = generic_listxattr,
6704 .removexattr = generic_removexattr,
6b3b5496
BF		 6705};
6706
509de811 6707const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6708 .version = 4, /* protocol version */
6709 .dentry_ops = &nfs4_dentry_operations,
6710 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6711 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6712 .file_ops = &nfs4_file_operations,
1da177e4 6713 .getroot = nfs4_proc_get_root,
281cad46 6714 .submount = nfs4_submount,
ff9099f2 6715 .try_mount = nfs4_try_mount,
1da177e4
LT		 6716 .getattr = nfs4_proc_getattr,
6717 .setattr = nfs4_proc_setattr,
6718 .lookup = nfs4_proc_lookup,
6719 .access = nfs4_proc_access,
6720 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6721 .create = nfs4_proc_create,
6722 .remove = nfs4_proc_remove,
6723 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6724 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6725 .unlink_done = nfs4_proc_unlink_done,
6726 .rename = nfs4_proc_rename,
d3d4152a 6727 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6728 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6729 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6730 .link = nfs4_proc_link,
6731 .symlink = nfs4_proc_symlink,
6732 .mkdir = nfs4_proc_mkdir,
6733 .rmdir = nfs4_proc_remove,
6734 .readdir = nfs4_proc_readdir,
6735 .mknod = nfs4_proc_mknod,
6736 .statfs = nfs4_proc_statfs,
6737 .fsinfo = nfs4_proc_fsinfo,
6738 .pathconf = nfs4_proc_pathconf,
e9326dca 6739 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6740 .decode_dirent = nfs4_decode_dirent,
6741 .read_setup = nfs4_proc_read_setup,
1abb5088 6742 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6743 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6744 .read_done = nfs4_read_done,
1da177e4 6745 .write_setup = nfs4_proc_write_setup,
57208fa7 6746 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6747 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6748 .write_done = nfs4_write_done,
1da177e4 6749 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6750 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6751 .commit_done = nfs4_commit_done,
1da177e4 6752 .lock = nfs4_proc_lock,
e50a1c2e 6753 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6754 .close_context = nfs4_close_context,
2b484297 6755 .open_context = nfs4_atomic_open,
011e2a7f 6756 .have_delegation = nfs4_have_delegation,
57ec14c5 6757 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6758 .alloc_client = nfs4_alloc_client,
45a52a02 6759 .init_client = nfs4_init_client,
cdb7eced 6760 .free_client = nfs4_free_client,
1179acc6
BS		 6761 .create_server = nfs4_create_server,
6762 .clone_server = nfs_clone_server,
1da177e4
LT		 6763};
6764
64c2ce8b
AK		 6765static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6766 .prefix = XATTR_NAME_NFSV4_ACL,
6767 .list = nfs4_xattr_list_nfs4_acl,
6768 .get = nfs4_xattr_get_nfs4_acl,
6769 .set = nfs4_xattr_set_nfs4_acl,
6770};
6771
6772const struct xattr_handler *nfs4_xattr_handlers[] = {
6773 &nfs4_xattr_nfs4_acl_handler,
6774 NULL
6775};
6776
1da177e4
LT		 6777/*
6778 * Local variables:
6779 * c-basic-offset: 8
6780 * End:
6781 */
Linux 6.x block layer and io_uring tree(s)