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NFS: Remove _nfs_call_sync_session
[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
f4af6e2a 404 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 405
406 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
407 send_new_highest_used_slotid = false;
408 if (!nfs4_session_draining(session)) {
275e7e20 409 if (rpc_wake_up_next(&tbl->slot_tbl_waitq) != NULL)
c10e4498
TM		 410 send_new_highest_used_slotid = false;
411 }
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
b0df806c 422 unsigned long timestamp;
14516c3a 423 struct nfs_client *clp;
b0df806c
AA		 424
425 /*
426 * sr_status remains 1 if an RPC level error occurred. The server
427 * may or may not have processed the sequence operation..
428 * Proceed as if the server received and processed the sequence
429 * operation.
430 */
431 if (res->sr_status == 1)
432 res->sr_status = NFS_OK;
433
468f8613
BS		 434 /* don't increment the sequence number if the task wasn't sent */
435 if (!RPC_WAS_SENT(task))
b0df806c
AA		 436 goto out;
437
933602e3 438 slot = res->sr_slot;
e3725ec0 439 session = slot->table->session;
933602e3 440
691daf3b 441 /* Check the SEQUENCE operation status */
14516c3a
TM		 442 switch (res->sr_status) {
443 case 0:
b0df806c 444 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 445 ++slot->seq_nr;
446 timestamp = slot->renewal_time;
e3725ec0 447 clp = session->clp;
452e9352 448 do_renew_lease(clp, timestamp);
0629e370 449 /* Check sequence flags */
b4410c2f
TM		 450 if (res->sr_status_flags != 0)
451 nfs4_schedule_lease_recovery(clp);
464ee9f9 452 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a
TM		 453 break;
454 case -NFS4ERR_DELAY:
455 /* The server detected a resend of the RPC call and
456 * returned NFS4ERR_DELAY as per Section 2.10.6.2
457 * of RFC5661.
458 */
df2fabff 459 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 460 __func__,
df2fabff 461 slot->slot_nr,
933602e3 462 slot->seq_nr);
14516c3a
TM		 463 goto out_retry;
464 default:
465 /* Just update the slot sequence no. */
933602e3 466 ++slot->seq_nr;
b0df806c
AA		 467 }
468out:
469 /* The session may be reset by one of the error handlers. */
470 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 471 nfs41_sequence_free_slot(res);
14516c3a
TM		 472 return 1;
473out_retry:
d05dd4e9 474 if (!rpc_restart_call(task))
14516c3a
TM		 475 goto out;
476 rpc_delay(task, NFS4_POLL_RETRY_MAX);
477 return 0;
b0df806c
AA		 478}
479
14516c3a
TM		 480static int nfs4_sequence_done(struct rpc_task *task,
481 struct nfs4_sequence_res *res)
df896455 482{
e3725ec0 483 if (res->sr_slot == NULL)
14516c3a
TM		 484 return 1;
485 return nfs41_sequence_done(task, res);
df896455
TM		 486}
487
9d12b216
TM		 488static void nfs41_init_sequence(struct nfs4_sequence_args *args,
489 struct nfs4_sequence_res *res, int cache_reply)
490{
2b2fa717 491 args->sa_slot = NULL;
9d12b216 492 args->sa_cache_this = 0;
8fe72bac 493 args->sa_privileged = 0;
9d12b216
TM		 494 if (cache_reply)
495 args->sa_cache_this = 1;
9d12b216
TM		 496 res->sr_slot = NULL;
497}
498
8fe72bac
TM		 499static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
500{
501 args->sa_privileged = 1;
502}
503
dc70d7b3 504int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 505 struct nfs4_sequence_args *args,
506 struct nfs4_sequence_res *res,
ce5039c1
AA		 507 struct rpc_task *task)
508{
fbcd4abc
AA		 509 struct nfs4_slot *slot;
510 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 511
512 dprintk("--> %s\n", __func__);
ce5039c1 513 /* slot already allocated? */
dfb4f309 514 if (res->sr_slot != NULL)
d9afbd1b 515 goto out_success;
ce5039c1 516
fbcd4abc
AA		 517 tbl = &session->fc_slot_table;
518
69d206b5
TM		 519 task->tk_timeout = 0;
520
fbcd4abc 521 spin_lock(&tbl->slot_tbl_lock);
a2118c33 522 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 523 !args->sa_privileged) {
0b1c8fc4 524 /* The state manager will wait until the slot table is empty */
0b1c8fc4 525 dprintk("%s session is draining\n", __func__);
7b939a3f 526 goto out_sleep;
689cf5c1
AB		 527 }
528
2dc03b7f 529 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 530 if (IS_ERR(slot)) {
531 /* If out of memory, try again in 1/4 second */
532 if (slot == ERR_PTR(-ENOMEM))
533 task->tk_timeout = HZ >> 2;
fbcd4abc 534 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 535 goto out_sleep;
fbcd4abc
AA		 536 }
537 spin_unlock(&tbl->slot_tbl_lock);
538
689cf5c1 539 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
2b2fa717
TM		 540
541 args->sa_slot = slot;
fbcd4abc 542
2dc03b7f
TM		 543 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
544 slot->slot_nr, slot->seq_nr);
fbcd4abc 545
dfb4f309 546 res->sr_slot = slot;
2a6e26cd 547 res->sr_status_flags = 0;
fbcd4abc
AA		 548 /*
549 * sr_status is only set in decode_sequence, and so will remain
550 * set to 1 if an rpc level failure occurs.
551 */
552 res->sr_status = 1;
d9afbd1b
TM		 553out_success:
554 rpc_call_start(task);
ce5039c1 555 return 0;
7b939a3f 556out_sleep:
8fe72bac
TM		 557 /* Privileged tasks are queued with top priority */
558 if (args->sa_privileged)
559 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
7b939a3f
TM		 560 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
561 spin_unlock(&tbl->slot_tbl_lock);
562 return -EAGAIN;
ce5039c1 563}
dc70d7b3 564EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 565
035168ab 566int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
ce5039c1
AA		 569 struct rpc_task *task)
570{
035168ab 571 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 572 int ret = 0;
573
d9afbd1b
TM		 574 if (session == NULL) {
575 rpc_call_start(task);
035168ab 576 goto out;
d9afbd1b 577 }
035168ab 578
df2fabff 579 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 580 __func__, session->clp, session, res->sr_slot ?
df2fabff 581 res->sr_slot->slot_nr : -1);
ce5039c1 582
9d12b216 583 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 584out:
585 dprintk("<-- %s status=%d\n", __func__, ret);
586 return ret;
587}
588
589struct nfs41_call_sync_data {
035168ab 590 const struct nfs_server *seq_server;
ce5039c1
AA		 591 struct nfs4_sequence_args *seq_args;
592 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 593};
594
595static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
596{
597 struct nfs41_call_sync_data *data = calldata;
6ba7db34 598 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 599
035168ab
TM		 600 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
601
d9afbd1b 602 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 603}
604
69ab40c4
AA		 605static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
606{
607 struct nfs41_call_sync_data *data = calldata;
608
14516c3a 609 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 610}
611
17280175 612static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 613 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 614 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 615};
616
7c513058
BS		 617static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
618 struct nfs_server *server,
ce5039c1
AA		 619 struct rpc_message *msg,
620 struct nfs4_sequence_args *args,
8fe72bac 621 struct nfs4_sequence_res *res)
ce5039c1
AA		 622{
623 int ret;
624 struct rpc_task *task;
625 struct nfs41_call_sync_data data = {
035168ab 626 .seq_server = server,
ce5039c1
AA		 627 .seq_args = args,
628 .seq_res = res,
ce5039c1
AA		 629 };
630 struct rpc_task_setup task_setup = {
7c513058 631 .rpc_client = clnt,
ce5039c1
AA		 632 .rpc_message = msg,
633 .callback_ops = &nfs41_call_sync_ops,
634 .callback_data = &data
635 };
636
ce5039c1
AA		 637 task = rpc_run_task(&task_setup);
638 if (IS_ERR(task))
639 ret = PTR_ERR(task);
640 else {
641 ret = task->tk_status;
642 rpc_put_task(task);
643 }
644 return ret;
645}
646
df896455 647#else
8fe72bac 648static
9d12b216
TM		 649void nfs41_init_sequence(struct nfs4_sequence_args *args,
650 struct nfs4_sequence_res *res, int cache_reply)
651{
652}
653
8fe72bac
TM		 654static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
655{
656}
657
658
14516c3a
TM		 659static int nfs4_sequence_done(struct rpc_task *task,
660 struct nfs4_sequence_res *res)
df896455 661{
14516c3a 662 return 1;
df896455 663}
cccef3b9
AA		 664#endif /* CONFIG_NFS_V4_1 */
665
fd0c0953 666static
7c513058
BS		 667int _nfs4_call_sync(struct rpc_clnt *clnt,
668 struct nfs_server *server,
cccef3b9
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
fd0c0953 671 struct nfs4_sequence_res *res)
cccef3b9 672{
7c513058 673 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 674}
675
fd0c0953 676static
7c513058
BS		 677int nfs4_call_sync(struct rpc_clnt *clnt,
678 struct nfs_server *server,
e73b83f2
BS		 679 struct rpc_message *msg,
680 struct nfs4_sequence_args *args,
681 struct nfs4_sequence_res *res,
682 int cache_reply)
683{
fd0c0953 684 nfs41_init_sequence(args, res, cache_reply);
7c513058 685 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 686 args, res);
e73b83f2 687}
cccef3b9 688
38478b24 689static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 690{
38478b24 691 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 692
38478b24 693 spin_lock(&dir->i_lock);
359d7d1c 694 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 695 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 696 nfs_force_lookup_revalidate(dir);
a9a4a87a 697 dir->i_version = cinfo->after;
38478b24 698 spin_unlock(&dir->i_lock);
1da177e4
LT		 699}
700
e56e0b78 701struct nfs4_opendata {
c6d00e63 702 struct kref kref;
e56e0b78
TM		 703 struct nfs_openargs o_arg;
704 struct nfs_openres o_res;
cdd4e68b
TM		 705 struct nfs_open_confirmargs c_arg;
706 struct nfs_open_confirmres c_res;
6926afd1
TM		 707 struct nfs4_string owner_name;
708 struct nfs4_string group_name;
e56e0b78 709 struct nfs_fattr f_attr;
e56e0b78 710 struct dentry *dir;
82a2c1b7 711 struct dentry *dentry;
e56e0b78 712 struct nfs4_state_owner *owner;
aac00a8d 713 struct nfs4_state *state;
e56e0b78 714 struct iattr attrs;
26e976a8 715 unsigned long timestamp;
3e309914 716 unsigned int rpc_done : 1;
24ac23ab
TM		 717 int rpc_status;
718 int cancelled;
e56e0b78
TM		 719};
720
2ced46c2
TM		 721
722static void nfs4_init_opendata_res(struct nfs4_opendata *p)
723{
724 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 725 p->o_res.seqid = p->o_arg.seqid;
726 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 727 p->o_res.server = p->o_arg.server;
5f657530 728 p->o_res.access_request = p->o_arg.access;
2ced46c2 729 nfs_fattr_init(&p->f_attr);
6926afd1 730 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 731}
732
82a2c1b7 733static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 734 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 735 const struct iattr *attrs,
736 gfp_t gfp_mask)
e56e0b78 737{
82a2c1b7 738 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 739 struct inode *dir = parent->d_inode;
740 struct nfs_server *server = NFS_SERVER(dir);
741 struct nfs4_opendata *p;
742
8535b2be 743 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 744 if (p == NULL)
745 goto err;
8535b2be 746 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 747 if (p->o_arg.seqid == NULL)
748 goto err_free;
82a2c1b7
AV		 749 nfs_sb_active(dentry->d_sb);
750 p->dentry = dget(dentry);
e56e0b78
TM		 751 p->dir = parent;
752 p->owner = sp;
753 atomic_inc(&sp->so_count);
754 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 755 p->o_arg.open_flags = flags;
756 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 757 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
758 * will return permission denied for all bits until close */
759 if (!(flags & O_EXCL)) {
760 /* ask server to check for all possible rights as results
761 * are cached */
762 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
763 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 764 }
7539bbab 765 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 766 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
767 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 768 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 769 p->o_arg.server = server;
770 p->o_arg.bitmask = server->attr_bitmask;
1549210f 771 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 772 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 773 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 774 __be32 verf[2];
d77d76ff 775
e56e0b78
TM		 776 p->o_arg.u.attrs = &p->attrs;
777 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 778
779 verf[0] = jiffies;
780 verf[1] = current->pid;
781 memcpy(p->o_arg.u.verifier.data, verf,
782 sizeof(p->o_arg.u.verifier.data));
e56e0b78 783 }
cdd4e68b
TM		 784 p->c_arg.fh = &p->o_res.fh;
785 p->c_arg.stateid = &p->o_res.stateid;
786 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 787 nfs4_init_opendata_res(p);
c6d00e63 788 kref_init(&p->kref);
e56e0b78
TM		 789 return p;
790err_free:
791 kfree(p);
792err:
793 dput(parent);
794 return NULL;
795}
796
c6d00e63 797static void nfs4_opendata_free(struct kref *kref)
e56e0b78 798{
c6d00e63
TM		 799 struct nfs4_opendata *p = container_of(kref,
800 struct nfs4_opendata, kref);
82a2c1b7 801 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 802
803 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 804 if (p->state != NULL)
805 nfs4_put_open_state(p->state);
c6d00e63
TM		 806 nfs4_put_state_owner(p->owner);
807 dput(p->dir);
82a2c1b7
AV		 808 dput(p->dentry);
809 nfs_sb_deactive(sb);
6926afd1 810 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 811 kfree(p);
812}
813
814static void nfs4_opendata_put(struct nfs4_opendata *p)
815{
816 if (p != NULL)
817 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 818}
819
06f814a3
TM		 820static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
821{
06f814a3
TM		 822 int ret;
823
06f814a3 824 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 825 return ret;
826}
827
dc0b027d 828static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 829{
830 int ret = 0;
dc0b027d 831
536e43d1 832 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 833 goto out;
834 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 835 case FMODE_READ:
88069f77
TM		 836 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
837 && state->n_rdonly != 0;
6ee41268
TM		 838 break;
839 case FMODE_WRITE:
88069f77
TM		 840 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
841 && state->n_wronly != 0;
6ee41268
TM		 842 break;
843 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 844 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
845 && state->n_rdwr != 0;
6ee41268 846 }
dc0b027d 847out:
6ee41268
TM		 848 return ret;
849}
850
dc0b027d 851static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 852{
652f89f6
TM		 853 if (delegation == NULL)
854 return 0;
dc0b027d 855 if ((delegation->type & fmode) != fmode)
aac00a8d 856 return 0;
15c831bf 857 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 858 return 0;
b7391f44 859 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 860 return 1;
861}
862
dc0b027d 863static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 864{
dc0b027d 865 switch (fmode) {
e7616923
TM		 866 case FMODE_WRITE:
867 state->n_wronly++;
868 break;
869 case FMODE_READ:
870 state->n_rdonly++;
871 break;
872 case FMODE_READ|FMODE_WRITE:
873 state->n_rdwr++;
874 }
dc0b027d 875 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 876}
877
dc0b027d 878static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 879{
880 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 881 nfs4_stateid_copy(&state->stateid, stateid);
882 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 883 switch (fmode) {
003707c7
TM		 884 case FMODE_READ:
885 set_bit(NFS_O_RDONLY_STATE, &state->flags);
886 break;
887 case FMODE_WRITE:
888 set_bit(NFS_O_WRONLY_STATE, &state->flags);
889 break;
890 case FMODE_READ|FMODE_WRITE:
891 set_bit(NFS_O_RDWR_STATE, &state->flags);
892 }
e7616923
TM		 893}
894
dc0b027d 895static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 896{
8bda4e4c 897 write_seqlock(&state->seqlock);
dc0b027d 898 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 899 write_sequnlock(&state->seqlock);
003707c7
TM		 900}
901
dc0b027d 902static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 903{
8bda4e4c
TM		 904 /*
905 * Protect the call to nfs4_state_set_mode_locked and
906 * serialise the stateid update
907 */
908 write_seqlock(&state->seqlock);
003707c7 909 if (deleg_stateid != NULL) {
f597c537 910 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 911 set_bit(NFS_DELEGATED_STATE, &state->flags);
912 }
913 if (open_stateid != NULL)
dc0b027d 914 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 915 write_sequnlock(&state->seqlock);
916 spin_lock(&state->owner->so_lock);
dc0b027d 917 update_open_stateflags(state, fmode);
ec073428 918 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 919}
920
dc0b027d 921static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 922{
923 struct nfs_inode *nfsi = NFS_I(state->inode);
924 struct nfs_delegation *deleg_cur;
925 int ret = 0;
926
dc0b027d 927 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 928
929 rcu_read_lock();
930 deleg_cur = rcu_dereference(nfsi->delegation);
931 if (deleg_cur == NULL)
932 goto no_delegation;
933
934 spin_lock(&deleg_cur->lock);
935 if (nfsi->delegation != deleg_cur ||
dc0b027d 936 (deleg_cur->type & fmode) != fmode)
34310430
TM		 937 goto no_delegation_unlock;
938
939 if (delegation == NULL)
940 delegation = &deleg_cur->stateid;
f597c537 941 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 942 goto no_delegation_unlock;
943
b7391f44 944 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 945 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 946 ret = 1;
947no_delegation_unlock:
948 spin_unlock(&deleg_cur->lock);
949no_delegation:
950 rcu_read_unlock();
951
952 if (!ret && open_stateid != NULL) {
dc0b027d 953 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 954 ret = 1;
955 }
956
957 return ret;
958}
959
960
dc0b027d 961static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 962{
963 struct nfs_delegation *delegation;
964
965 rcu_read_lock();
966 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 967 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 968 rcu_read_unlock();
969 return;
970 }
971 rcu_read_unlock();
57ec14c5 972 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 973}
974
6ee41268 975static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 976{
977 struct nfs4_state *state = opendata->state;
978 struct nfs_inode *nfsi = NFS_I(state->inode);
979 struct nfs_delegation *delegation;
536e43d1 980 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 981 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 982 nfs4_stateid stateid;
983 int ret = -EAGAIN;
984
aac00a8d 985 for (;;) {
dc0b027d 986 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 987 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 988 if (can_open_cached(state, fmode, open_mode)) {
989 update_open_stateflags(state, fmode);
6ee41268 990 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 991 goto out_return_state;
992 }
993 spin_unlock(&state->owner->so_lock);
994 }
34310430
TM		 995 rcu_read_lock();
996 delegation = rcu_dereference(nfsi->delegation);
652f89f6 997 if (!can_open_delegated(delegation, fmode)) {
34310430 998 rcu_read_unlock();
aac00a8d 999 break;
34310430 1000 }
aac00a8d 1001 /* Save the delegation */
f597c537 1002 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1003 rcu_read_unlock();
af22f94a 1004 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1005 if (ret != 0)
1006 goto out;
1007 ret = -EAGAIN;
34310430
TM		 1008
1009 /* Try to update the stateid using the delegation */
dc0b027d 1010 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1011 goto out_return_state;
aac00a8d 1012 }
aac00a8d
TM		 1013out:
1014 return ERR_PTR(ret);
1015out_return_state:
1016 atomic_inc(&state->count);
1017 return state;
1018}
1019
e23008ec
AA		 1020static void
1021nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1022{
1023 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1024 struct nfs_delegation *delegation;
1025 int delegation_flags = 0;
1026
1027 rcu_read_lock();
1028 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1029 if (delegation)
1030 delegation_flags = delegation->flags;
1031 rcu_read_unlock();
1032 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1033 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1034 "returning a delegation for "
1035 "OPEN(CLAIM_DELEGATE_CUR)\n",
1036 clp->cl_hostname);
1037 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1038 nfs_inode_set_delegation(state->inode,
1039 data->owner->so_cred,
1040 &data->o_res);
1041 else
1042 nfs_inode_reclaim_delegation(state->inode,
1043 data->owner->so_cred,
1044 &data->o_res);
1045}
1046
1047/*
1048 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1049 * and update the nfs4_state.
1050 */
1051static struct nfs4_state *
1052_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1053{
1054 struct inode *inode = data->state->inode;
1055 struct nfs4_state *state = data->state;
1056 int ret;
1057
1058 if (!data->rpc_done) {
1059 ret = data->rpc_status;
1060 goto err;
1061 }
1062
1063 ret = -ESTALE;
1064 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1065 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1066 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1067 goto err;
1068
1069 ret = -ENOMEM;
1070 state = nfs4_get_open_state(inode, data->owner);
1071 if (state == NULL)
1072 goto err;
1073
1074 ret = nfs_refresh_inode(inode, &data->f_attr);
1075 if (ret)
1076 goto err;
1077
1078 if (data->o_res.delegation_type != 0)
1079 nfs4_opendata_check_deleg(data, state);
1080 update_open_stateid(state, &data->o_res.stateid, NULL,
1081 data->o_arg.fmode);
1082
1083 return state;
1084err:
1085 return ERR_PTR(ret);
1086
1087}
1088
1089static struct nfs4_state *
1090_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1091{
1092 struct inode *inode;
1093 struct nfs4_state *state = NULL;
1b370bc2 1094 int ret;
24ac23ab 1095
aac00a8d 1096 if (!data->rpc_done) {
6ee41268 1097 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1098 goto out;
1099 }
1100
1b370bc2 1101 ret = -EAGAIN;
24ac23ab 1102 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1103 goto err;
24ac23ab 1104 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1105 ret = PTR_ERR(inode);
03f28e3a 1106 if (IS_ERR(inode))
1b370bc2
TM		 1107 goto err;
1108 ret = -ENOMEM;
24ac23ab
TM		 1109 state = nfs4_get_open_state(inode, data->owner);
1110 if (state == NULL)
1b370bc2 1111 goto err_put_inode;
e23008ec
AA		 1112 if (data->o_res.delegation_type != 0)
1113 nfs4_opendata_check_deleg(data, state);
34310430 1114 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1115 data->o_arg.fmode);
24ac23ab 1116 iput(inode);
aac00a8d 1117out:
24ac23ab 1118 return state;
1b370bc2
TM		 1119err_put_inode:
1120 iput(inode);
1121err:
1122 return ERR_PTR(ret);
24ac23ab
TM		 1123}
1124
e23008ec
AA		 1125static struct nfs4_state *
1126nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1127{
1128 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1129 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1130 return _nfs4_opendata_to_nfs4_state(data);
1131}
1132
864472e9
TM		 1133static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1134{
1135 struct nfs_inode *nfsi = NFS_I(state->inode);
1136 struct nfs_open_context *ctx;
1137
1138 spin_lock(&state->inode->i_lock);
1139 list_for_each_entry(ctx, &nfsi->open_files, list) {
1140 if (ctx->state != state)
1141 continue;
1142 get_nfs_open_context(ctx);
1143 spin_unlock(&state->inode->i_lock);
1144 return ctx;
1145 }
1146 spin_unlock(&state->inode->i_lock);
1147 return ERR_PTR(-ENOENT);
1148}
1149
6f220ed5
TM		 1150static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1151{
1152 struct nfs4_opendata *opendata;
1153
3d4ff43d 1154 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1155 if (opendata == NULL)
1156 return ERR_PTR(-ENOMEM);
1157 opendata->state = state;
1158 atomic_inc(&state->count);
1159 return opendata;
1160}
1161
dc0b027d 1162static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1163{
2ced46c2 1164 struct nfs4_state *newstate;
864472e9
TM		 1165 int ret;
1166
dc0b027d
TM		 1167 opendata->o_arg.open_flags = 0;
1168 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1169 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1170 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1171 nfs4_init_opendata_res(opendata);
b257957e 1172 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1173 if (ret != 0)
1174 return ret;
2ced46c2 1175 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1176 if (IS_ERR(newstate))
1177 return PTR_ERR(newstate);
643168c2 1178 nfs4_close_state(newstate, fmode);
2ced46c2 1179 *res = newstate;
864472e9
TM		 1180 return 0;
1181}
1182
1183static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1184{
864472e9 1185 struct nfs4_state *newstate;
864472e9
TM		 1186 int ret;
1187
1188 /* memory barrier prior to reading state->n_* */
2ced46c2 1189 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1190 smp_rmb();
1191 if (state->n_rdwr != 0) {
b0ed9dbc 1192 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1193 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1194 if (ret != 0)
1195 return ret;
2ced46c2
TM		 1196 if (newstate != state)
1197 return -ESTALE;
864472e9
TM		 1198 }
1199 if (state->n_wronly != 0) {
b0ed9dbc 1200 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1201 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1202 if (ret != 0)
1203 return ret;
2ced46c2
TM		 1204 if (newstate != state)
1205 return -ESTALE;
864472e9
TM		 1206 }
1207 if (state->n_rdonly != 0) {
b0ed9dbc 1208 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1209 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1210 if (ret != 0)
1211 return ret;
2ced46c2
TM		 1212 if (newstate != state)
1213 return -ESTALE;
864472e9 1214 }
1ac7e2fd
TM		 1215 /*
1216 * We may have performed cached opens for all three recoveries.
1217 * Check if we need to update the current stateid.
1218 */
1219 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1220 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1221 write_seqlock(&state->seqlock);
1ac7e2fd 1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1223 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1224 write_sequnlock(&state->seqlock);
1ac7e2fd 1225 }
864472e9
TM		 1226 return 0;
1227}
1228
1da177e4
LT		 1229/*
1230 * OPEN_RECLAIM:
1231 * reclaim state on the server after a reboot.
1da177e4 1232 */
539cd03a 1233static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1234{
1ac7e2fd 1235 struct nfs_delegation *delegation;
864472e9 1236 struct nfs4_opendata *opendata;
dc0b027d 1237 fmode_t delegation_type = 0;
1da177e4
LT		 1238 int status;
1239
6f220ed5
TM		 1240 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1241 if (IS_ERR(opendata))
1242 return PTR_ERR(opendata);
864472e9
TM		 1243 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1244 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1245 rcu_read_lock();
1246 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1247 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1248 delegation_type = delegation->type;
1ac7e2fd 1249 rcu_read_unlock();
864472e9
TM		 1250 opendata->o_arg.u.delegation_type = delegation_type;
1251 status = nfs4_open_recover(opendata, state);
c6d00e63 1252 nfs4_opendata_put(opendata);
1da177e4
LT		 1253 return status;
1254}
1255
539cd03a 1256static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1257{
1258 struct nfs_server *server = NFS_SERVER(state->inode);
1259 struct nfs4_exception exception = { };
1260 int err;
1261 do {
539cd03a 1262 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1263 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1264 break;
1265 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1266 } while (exception.retry);
1267 return err;
1268}
1269
864472e9
TM		 1270static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1271{
1272 struct nfs_open_context *ctx;
1273 int ret;
1274
1275 ctx = nfs4_state_find_open_context(state);
1276 if (IS_ERR(ctx))
1277 return PTR_ERR(ctx);
539cd03a 1278 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1279 put_nfs_open_context(ctx);
1280 return ret;
1281}
1282
13437e12 1283static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1284{
e56e0b78 1285 struct nfs4_opendata *opendata;
864472e9 1286 int ret;
1da177e4 1287
6f220ed5
TM		 1288 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1289 if (IS_ERR(opendata))
1290 return PTR_ERR(opendata);
e56e0b78 1291 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1292 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1293 ret = nfs4_open_recover(opendata, state);
c6d00e63 1294 nfs4_opendata_put(opendata);
864472e9 1295 return ret;
1da177e4
LT		 1296}
1297
13437e12 1298int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1299{
1300 struct nfs4_exception exception = { };
539cd03a 1301 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1302 int err;
1303 do {
13437e12 1304 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1305 switch (err) {
1306 case 0:
965b5d67
TM		 1307 case -ENOENT:
1308 case -ESTALE:
1309 goto out;
bcfa49f6
RL		 1310 case -NFS4ERR_BADSESSION:
1311 case -NFS4ERR_BADSLOT:
1312 case -NFS4ERR_BAD_HIGH_SLOT:
1313 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1314 case -NFS4ERR_DEADSESSION:
9f594791 1315 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1316 goto out;
1da177e4
LT		 1317 case -NFS4ERR_STALE_CLIENTID:
1318 case -NFS4ERR_STALE_STATEID:
1319 case -NFS4ERR_EXPIRED:
1320 /* Don't recall a delegation if it was lost */
0400a6b0 1321 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1322 goto out;
1323 case -ERESTARTSYS:
1324 /*
1325 * The show must go on: exit, but mark the
1326 * stateid as needing recovery.
1327 */
a1d0b5ee 1328 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1329 case -NFS4ERR_ADMIN_REVOKED:
1330 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1331 nfs_inode_find_state_and_recover(state->inode,
1332 stateid);
0400a6b0 1333 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1334 case -EKEYEXPIRED:
1335 /*
1336 * User RPCSEC_GSS context has expired.
1337 * We cannot recover this stateid now, so
1338 * skip it and allow recovery thread to
1339 * proceed.
1340 */
965b5d67
TM		 1341 case -ENOMEM:
1342 err = 0;
1343 goto out;
1da177e4
LT		 1344 }
1345 err = nfs4_handle_exception(server, err, &exception);
1346 } while (exception.retry);
965b5d67 1347out:
1da177e4
LT		 1348 return err;
1349}
1350
cdd4e68b
TM		 1351static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1352{
1353 struct nfs4_opendata *data = calldata;
1354
1355 data->rpc_status = task->tk_status;
26e976a8 1356 if (data->rpc_status == 0) {
f597c537 1357 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1358 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1359 renew_lease(data->o_res.server, data->timestamp);
3e309914 1360 data->rpc_done = 1;
26e976a8 1361 }
cdd4e68b
TM		 1362}
1363
1364static void nfs4_open_confirm_release(void *calldata)
1365{
1366 struct nfs4_opendata *data = calldata;
1367 struct nfs4_state *state = NULL;
1368
1369 /* If this request hasn't been cancelled, do nothing */
1370 if (data->cancelled == 0)
1371 goto out_free;
1372 /* In case of error, no cleanup! */
3e309914 1373 if (!data->rpc_done)
cdd4e68b 1374 goto out_free;
cdd4e68b 1375 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1376 if (!IS_ERR(state))
643168c2 1377 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1378out_free:
c6d00e63 1379 nfs4_opendata_put(data);
cdd4e68b
TM		 1380}
1381
1382static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1383 .rpc_call_done = nfs4_open_confirm_done,
1384 .rpc_release = nfs4_open_confirm_release,
1385};
1386
1387/*
1388 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1389 */
1390static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1391{
1392 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1393 struct rpc_task *task;
5138fde0
TM		 1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1396 .rpc_argp = &data->c_arg,
1397 .rpc_resp = &data->c_res,
1398 .rpc_cred = data->owner->so_cred,
1399 };
c970aa85
TM		 1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
5138fde0 1402 .rpc_message = &msg,
c970aa85
TM		 1403 .callback_ops = &nfs4_open_confirm_ops,
1404 .callback_data = data,
101070ca 1405 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1406 .flags = RPC_TASK_ASYNC,
1407 };
1da177e4
LT		 1408 int status;
1409
c6d00e63 1410 kref_get(&data->kref);
3e309914
TM		 1411 data->rpc_done = 0;
1412 data->rpc_status = 0;
5138fde0 1413 data->timestamp = jiffies;
c970aa85 1414 task = rpc_run_task(&task_setup_data);
7a1218a2 1415 if (IS_ERR(task))
cdd4e68b 1416 return PTR_ERR(task);
cdd4e68b
TM		 1417 status = nfs4_wait_for_completion_rpc_task(task);
1418 if (status != 0) {
1419 data->cancelled = 1;
1420 smp_wmb();
1421 } else
1422 status = data->rpc_status;
e6b3c4db 1423 rpc_put_task(task);
1da177e4
LT		 1424 return status;
1425}
1426
24ac23ab 1427static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1428{
24ac23ab
TM		 1429 struct nfs4_opendata *data = calldata;
1430 struct nfs4_state_owner *sp = data->owner;
5138fde0 1431
24ac23ab
TM		 1432 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1433 return;
aac00a8d
TM		 1434 /*
1435 * Check if we still need to send an OPEN call, or if we can use
1436 * a delegation instead.
1437 */
1438 if (data->state != NULL) {
1439 struct nfs_delegation *delegation;
1440
dc0b027d 1441 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1442 goto out_no_action;
aac00a8d
TM		 1443 rcu_read_lock();
1444 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1445 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1446 can_open_delegated(delegation, data->o_arg.fmode))
1447 goto unlock_no_action;
aac00a8d
TM		 1448 rcu_read_unlock();
1449 }
95b72eb0 1450 /* Update client id. */
1f0e890d 1451 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1452 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1453 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1454 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1455 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1456 }
26e976a8 1457 data->timestamp = jiffies;
035168ab 1458 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1459 &data->o_arg.seq_args,
2240a9e2
TM		 1460 &data->o_res.seq_res,
1461 task) != 0)
1462 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1463 return;
652f89f6
TM		 1464unlock_no_action:
1465 rcu_read_unlock();
6ee41268
TM		 1466out_no_action:
1467 task->tk_action = NULL;
b257957e
AB		 1468}
1469
24ac23ab
TM		 1470static void nfs4_open_done(struct rpc_task *task, void *calldata)
1471{
1472 struct nfs4_opendata *data = calldata;
1da177e4 1473
24ac23ab 1474 data->rpc_status = task->tk_status;
d898528c 1475
14516c3a
TM		 1476 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1477 return;
d898528c 1478
24ac23ab 1479 if (task->tk_status == 0) {
807d66d8
TM		 1480 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1481 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1482 case S_IFREG:
1483 break;
1484 case S_IFLNK:
24ac23ab 1485 data->rpc_status = -ELOOP;
6f926b5b
TM		 1486 break;
1487 case S_IFDIR:
24ac23ab 1488 data->rpc_status = -EISDIR;
6f926b5b
TM		 1489 break;
1490 default:
24ac23ab 1491 data->rpc_status = -ENOTDIR;
807d66d8 1492 }
6f926b5b 1493 }
26e976a8 1494 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1495 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1496 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1497 }
3e309914 1498 data->rpc_done = 1;
24ac23ab 1499}
6f926b5b 1500
24ac23ab
TM		 1501static void nfs4_open_release(void *calldata)
1502{
1503 struct nfs4_opendata *data = calldata;
1504 struct nfs4_state *state = NULL;
1505
1506 /* If this request hasn't been cancelled, do nothing */
1507 if (data->cancelled == 0)
1508 goto out_free;
1509 /* In case of error, no cleanup! */
3e309914 1510 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1511 goto out_free;
1512 /* In case we need an open_confirm, no cleanup! */
1513 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1514 goto out_free;
24ac23ab 1515 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1516 if (!IS_ERR(state))
643168c2 1517 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1518out_free:
c6d00e63 1519 nfs4_opendata_put(data);
24ac23ab
TM		 1520}
1521
1522static const struct rpc_call_ops nfs4_open_ops = {
1523 .rpc_call_prepare = nfs4_open_prepare,
1524 .rpc_call_done = nfs4_open_done,
1525 .rpc_release = nfs4_open_release,
1526};
1527
b257957e 1528static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1529{
1530 struct inode *dir = data->dir->d_inode;
1531 struct nfs_server *server = NFS_SERVER(dir);
1532 struct nfs_openargs *o_arg = &data->o_arg;
1533 struct nfs_openres *o_res = &data->o_res;
1534 struct rpc_task *task;
5138fde0
TM		 1535 struct rpc_message msg = {
1536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1537 .rpc_argp = o_arg,
1538 .rpc_resp = o_res,
1539 .rpc_cred = data->owner->so_cred,
1540 };
c970aa85
TM		 1541 struct rpc_task_setup task_setup_data = {
1542 .rpc_client = server->client,
5138fde0 1543 .rpc_message = &msg,
c970aa85
TM		 1544 .callback_ops = &nfs4_open_ops,
1545 .callback_data = data,
101070ca 1546 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1547 .flags = RPC_TASK_ASYNC,
1548 };
24ac23ab
TM		 1549 int status;
1550
9d12b216 1551 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1552 kref_get(&data->kref);
3e309914
TM		 1553 data->rpc_done = 0;
1554 data->rpc_status = 0;
2ced46c2 1555 data->cancelled = 0;
b257957e 1556 if (isrecover)
8fe72bac 1557 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1558 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1559 if (IS_ERR(task))
1560 return PTR_ERR(task);
1561 status = nfs4_wait_for_completion_rpc_task(task);
1562 if (status != 0) {
1563 data->cancelled = 1;
1564 smp_wmb();
1565 } else
1566 status = data->rpc_status;
1567 rpc_put_task(task);
1568
1569 return status;
1570}
1571
1572static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1573{
1574 struct inode *dir = data->dir->d_inode;
1575 struct nfs_openres *o_res = &data->o_res;
1576 int status;
1577
1578 status = nfs4_run_open_task(data, 1);
1579 if (status != 0 || !data->rpc_done)
1580 return status;
1581
6926afd1
TM		 1582 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1583
b257957e
AB		 1584 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1585 status = _nfs4_proc_open_confirm(data);
1586 if (status != 0)
1587 return status;
1588 }
1589
1590 return status;
1591}
1592
6168f62c
WAA		 1593static int nfs4_opendata_access(struct rpc_cred *cred,
1594 struct nfs4_opendata *opendata,
1595 struct nfs4_state *state, fmode_t fmode)
1596{
1597 struct nfs_access_entry cache;
1598 u32 mask;
1599
1600 /* access call failed or for some reason the server doesn't
1601 * support any access modes -- defer access call until later */
1602 if (opendata->o_res.access_supported == 0)
1603 return 0;
1604
1605 mask = 0;
bbd3a8ee
WAA		 1606 /* don't check MAY_WRITE - a newly created file may not have
1607 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1608 if (fmode & FMODE_READ)
1609 mask |= MAY_READ;
6168f62c
WAA		 1610 if (fmode & FMODE_EXEC)
1611 mask |= MAY_EXEC;
1612
1613 cache.cred = cred;
1614 cache.jiffies = jiffies;
1615 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1616 nfs_access_add_cache(state->inode, &cache);
1617
bbd3a8ee 1618 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1619 return 0;
1620
1621 /* even though OPEN succeeded, access is denied. Close the file */
1622 nfs4_close_state(state, fmode);
998f40b5 1623 return -EACCES;
6168f62c
WAA		 1624}
1625
b257957e
AB		 1626/*
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1628 */
1629static int _nfs4_proc_open(struct nfs4_opendata *data)
1630{
1631 struct inode *dir = data->dir->d_inode;
1632 struct nfs_server *server = NFS_SERVER(dir);
1633 struct nfs_openargs *o_arg = &data->o_arg;
1634 struct nfs_openres *o_res = &data->o_res;
1635 int status;
1636
1637 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1638 if (!data->rpc_done)
1639 return status;
1640 if (status != 0) {
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1643 return -ENOENT;
24ac23ab 1644 return status;
08ef7bd3 1645 }
24ac23ab 1646
6926afd1
TM		 1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
1648
90ff0c54 1649 if (o_arg->open_flags & O_CREAT)
56ae19f3 1650 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1651 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1652 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1653 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1654 status = _nfs4_proc_open_confirm(data);
1da177e4 1655 if (status != 0)
24ac23ab 1656 return status;
1da177e4
LT		 1657 }
1658 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1659 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1660 return 0;
1da177e4
LT		 1661}
1662
d83217c1
AA		 1663static int nfs4_recover_expired_lease(struct nfs_server *server)
1664{
1665 return nfs4_client_recover_expired_lease(server->nfs_client);
1666}
1667
1da177e4
LT		 1668/*
1669 * OPEN_EXPIRED:
1670 * reclaim state on the server after a network partition.
1671 * Assumes caller holds the appropriate lock
1672 */
539cd03a 1673static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1674{
e56e0b78 1675 struct nfs4_opendata *opendata;
864472e9 1676 int ret;
1da177e4 1677
6f220ed5
TM		 1678 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1679 if (IS_ERR(opendata))
1680 return PTR_ERR(opendata);
864472e9 1681 ret = nfs4_open_recover(opendata, state);
35d05778 1682 if (ret == -ESTALE)
3d4ff43d 1683 d_drop(ctx->dentry);
c6d00e63 1684 nfs4_opendata_put(opendata);
864472e9 1685 return ret;
1da177e4
LT		 1686}
1687
a9ed2e25 1688static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1689{
539cd03a 1690 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1691 struct nfs4_exception exception = { };
1692 int err;
1693
1694 do {
539cd03a 1695 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1696 switch (err) {
1697 default:
1698 goto out;
1699 case -NFS4ERR_GRACE:
1700 case -NFS4ERR_DELAY:
1701 nfs4_handle_exception(server, err, &exception);
1702 err = 0;
1703 }
202b50dc 1704 } while (exception.retry);
a9ed2e25 1705out:
202b50dc
TM		 1706 return err;
1707}
1708
1da177e4
LT		 1709static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1710{
1da177e4 1711 struct nfs_open_context *ctx;
864472e9 1712 int ret;
1da177e4 1713
864472e9
TM		 1714 ctx = nfs4_state_find_open_context(state);
1715 if (IS_ERR(ctx))
1716 return PTR_ERR(ctx);
539cd03a 1717 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1718 put_nfs_open_context(ctx);
1719 return ret;
1da177e4
LT		 1720}
1721
f062eb6c 1722#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1723static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1724{
f062eb6c 1725 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1726 nfs4_stateid *stateid = &state->stateid;
1727 int status;
1728
1729 /* If a state reset has been done, test_stateid is unneeded */
1730 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1731 return;
1732
1733 status = nfs41_test_stateid(server, stateid);
1734 if (status != NFS_OK) {
1735 /* Free the stateid unless the server explicitly
1736 * informs us the stateid is unrecognized. */
1737 if (status != -NFS4ERR_BAD_STATEID)
1738 nfs41_free_stateid(server, stateid);
6938867e 1739 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1740
6938867e
BS		 1741 write_seqlock(&state->seqlock);
1742 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1743 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1744 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1745 }
1746}
1747
1748/**
1749 * nfs41_check_open_stateid - possibly free an open stateid
1750 *
1751 * @state: NFSv4 state for an inode
1752 *
1753 * Returns NFS_OK if recovery for this stateid is now finished.
1754 * Otherwise a negative NFS4ERR value is returned.
1755 */
1756static int nfs41_check_open_stateid(struct nfs4_state *state)
1757{
1758 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1759 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1760 int status;
1761
1762 /* If a state reset has been done, test_stateid is unneeded */
1763 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1764 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1765 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1766 return -NFS4ERR_BAD_STATEID;
1767
1768 status = nfs41_test_stateid(server, stateid);
1769 if (status != NFS_OK) {
1770 /* Free the stateid unless the server explicitly
1771 * informs us the stateid is unrecognized. */
1772 if (status != -NFS4ERR_BAD_STATEID)
1773 nfs41_free_stateid(server, stateid);
1774
1775 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1776 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1778 }
1779 return status;
1780}
1781
1782static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1783{
eb64cf96 1784 int status;
b01dd1d8 1785
3e60ffdd
CL		 1786 nfs41_clear_delegation_stateid(state);
1787 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1788 if (status != NFS_OK)
1789 status = nfs4_open_expired(sp, state);
1790 return status;
f062eb6c
BS		 1791}
1792#endif
1793
aa53ed54
JL		 1794/*
1795 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1796 * fields corresponding to attributes that were used to store the verifier.
1797 * Make sure we clobber those fields in the later setattr call
1798 */
1799static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1800{
1801 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1802 !(sattr->ia_valid & ATTR_ATIME_SET))
1803 sattr->ia_valid |= ATTR_ATIME;
1804
1805 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1806 !(sattr->ia_valid & ATTR_MTIME_SET))
1807 sattr->ia_valid |= ATTR_MTIME;
1808}
1809
1da177e4 1810/*
24ac23ab 1811 * Returns a referenced nfs4_state
1da177e4 1812 */
82be417a
AA		 1813static int _nfs4_do_open(struct inode *dir,
1814 struct dentry *dentry,
1815 fmode_t fmode,
1816 int flags,
1817 struct iattr *sattr,
1818 struct rpc_cred *cred,
1819 struct nfs4_state **res,
1820 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1821{
1822 struct nfs4_state_owner *sp;
1823 struct nfs4_state *state = NULL;
1824 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1825 struct nfs4_opendata *opendata;
aac00a8d 1826 int status;
1da177e4
LT		 1827
1828 /* Protect against reboot recovery conflicts */
1da177e4 1829 status = -ENOMEM;
d1e284d5
TM		 1830 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1831 if (sp == NULL) {
1da177e4
LT		 1832 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1833 goto out_err;
1834 }
58d9714a
TM		 1835 status = nfs4_recover_expired_lease(server);
1836 if (status != 0)
b4454fe1 1837 goto err_put_state_owner;
82a2c1b7
AV		 1838 if (dentry->d_inode != NULL)
1839 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1840 status = -ENOMEM;
82a2c1b7 1841 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1842 if (opendata == NULL)
95d35cb4 1843 goto err_put_state_owner;
1da177e4 1844
82be417a
AA		 1845 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1846 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1847 if (!opendata->f_attr.mdsthreshold)
1848 goto err_opendata_put;
1549210f 1849 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1850 }
82a2c1b7
AV		 1851 if (dentry->d_inode != NULL)
1852 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1853
24ac23ab 1854 status = _nfs4_proc_open(opendata);
1da177e4 1855 if (status != 0)
c6d00e63 1856 goto err_opendata_put;
1da177e4 1857
24ac23ab 1858 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1859 status = PTR_ERR(state);
1860 if (IS_ERR(state))
c6d00e63 1861 goto err_opendata_put;
0df5dd4a 1862 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1863 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1864
6168f62c
WAA		 1865 status = nfs4_opendata_access(cred, opendata, state, fmode);
1866 if (status != 0)
1867 goto err_opendata_put;
1868
0ab64e0e
TM		 1869 if (opendata->o_arg.open_flags & O_EXCL) {
1870 nfs4_exclusive_attrset(opendata, sattr);
1871
1872 nfs_fattr_init(opendata->o_res.f_attr);
1873 status = nfs4_do_setattr(state->inode, cred,
1874 opendata->o_res.f_attr, sattr,
1875 state);
1876 if (status == 0)
1877 nfs_setattr_update_inode(state->inode, sattr);
1878 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1879 }
82be417a
AA		 1880
1881 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1882 *ctx_th = opendata->f_attr.mdsthreshold;
1883 else
1884 kfree(opendata->f_attr.mdsthreshold);
1885 opendata->f_attr.mdsthreshold = NULL;
1886
c6d00e63 1887 nfs4_opendata_put(opendata);
1da177e4 1888 nfs4_put_state_owner(sp);
1da177e4
LT		 1889 *res = state;
1890 return 0;
c6d00e63 1891err_opendata_put:
82be417a 1892 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1893 nfs4_opendata_put(opendata);
e56e0b78
TM		 1894err_put_state_owner:
1895 nfs4_put_state_owner(sp);
1da177e4 1896out_err:
1da177e4
LT		 1897 *res = NULL;
1898 return status;
1899}
1900
1901
82be417a
AA		 1902static struct nfs4_state *nfs4_do_open(struct inode *dir,
1903 struct dentry *dentry,
1904 fmode_t fmode,
1905 int flags,
1906 struct iattr *sattr,
1907 struct rpc_cred *cred,
1908 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1909{
1910 struct nfs4_exception exception = { };
1911 struct nfs4_state *res;
1912 int status;
1913
6168f62c 1914 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1915 do {
82be417a
AA		 1916 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1917 &res, ctx_th);
1da177e4
LT		 1918 if (status == 0)
1919 break;
1920 /* NOTE: BAD_SEQID means the server and client disagree about the
1921 * book-keeping w.r.t. state-changing operations
1922 * (OPEN/CLOSE/LOCK/LOCKU...)
1923 * It is actually a sign of a bug on the client or on the server.
1924 *
1925 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1926 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1927 * have unhashed the old state_owner for us, and that we can
1928 * therefore safely retry using a new one. We should still warn
1929 * the user though...
1930 */
1931 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1932 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1933 " returned a bad sequence-id error!\n",
1934 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1935 exception.retry = 1;
1936 continue;
1937 }
550f5747
TM		 1938 /*
1939 * BAD_STATEID on OPEN means that the server cancelled our
1940 * state before it received the OPEN_CONFIRM.
1941 * Recover by retrying the request as per the discussion
1942 * on Page 181 of RFC3530.
1943 */
1944 if (status == -NFS4ERR_BAD_STATEID) {
1945 exception.retry = 1;
1946 continue;
1947 }
aac00a8d
TM		 1948 if (status == -EAGAIN) {
1949 /* We must have found a delegation */
1950 exception.retry = 1;
1951 continue;
1952 }
1da177e4
LT		 1953 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1954 status, &exception));
1955 } while (exception.retry);
1956 return res;
1957}
1958
659bfcd6
TM		 1959static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1960 struct nfs_fattr *fattr, struct iattr *sattr,
1961 struct nfs4_state *state)
1da177e4 1962{
3e4f6290 1963 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1964 struct nfs_setattrargs arg = {
3e4f6290 1965 .fh = NFS_FH(inode),
1da177e4
LT		 1966 .iap = sattr,
1967 .server = server,
1968 .bitmask = server->attr_bitmask,
1969 };
1970 struct nfs_setattrres res = {
1971 .fattr = fattr,
1972 .server = server,
1973 };
1974 struct rpc_message msg = {
659bfcd6
TM		 1975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1976 .rpc_argp = &arg,
1977 .rpc_resp = &res,
1978 .rpc_cred = cred,
1da177e4 1979 };
26e976a8 1980 unsigned long timestamp = jiffies;
65e4308d 1981 int status;
1da177e4 1982
0e574af1 1983 nfs_fattr_init(fattr);
1da177e4 1984
4fc8796d 1985 if (state != NULL) {
2a369153
TM		 1986 struct nfs_lockowner lockowner = {
1987 .l_owner = current->files,
1988 .l_pid = current->tgid,
1989 };
4fc8796d 1990 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 1991 &lockowner);
4fc8796d
TM		 1992 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1993 FMODE_WRITE)) {
3e4f6290 1994 /* Use that stateid */
08e9eac4 1995 } else
f597c537 1996 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1997
7c513058 1998 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1999 if (status == 0 && state != NULL)
2000 renew_lease(server, timestamp);
65e4308d 2001 return status;
1da177e4
LT		 2002}
2003
659bfcd6
TM		 2004static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2005 struct nfs_fattr *fattr, struct iattr *sattr,
2006 struct nfs4_state *state)
1da177e4 2007{
3e4f6290 2008 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2009 struct nfs4_exception exception = {
2010 .state = state,
3114ea7a 2011 .inode = inode,
a1d0b5ee 2012 };
1da177e4
LT		 2013 int err;
2014 do {
451146be
TM		 2015 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2016 switch (err) {
2017 case -NFS4ERR_OPENMODE:
2018 if (state && !(state->state & FMODE_WRITE)) {
2019 err = -EBADF;
2020 if (sattr->ia_valid & ATTR_OPEN)
2021 err = -EACCES;
2022 goto out;
2023 }
2024 }
2025 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2026 } while (exception.retry);
451146be 2027out:
1da177e4
LT		 2028 return err;
2029}
2030
2031struct nfs4_closedata {
2032 struct inode *inode;
2033 struct nfs4_state *state;
2034 struct nfs_closeargs arg;
2035 struct nfs_closeres res;
516a6af6 2036 struct nfs_fattr fattr;
26e976a8 2037 unsigned long timestamp;
f7e8917a
FI		 2038 bool roc;
2039 u32 roc_barrier;
1da177e4
LT		 2040};
2041
963d8fe5 2042static void nfs4_free_closedata(void *data)
9512135d 2043{
963d8fe5
TM		 2044 struct nfs4_closedata *calldata = data;
2045 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2046 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2047
f7e8917a
FI		 2048 if (calldata->roc)
2049 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2050 nfs4_put_open_state(calldata->state);
2051 nfs_free_seqid(calldata->arg.seqid);
9512135d 2052 nfs4_put_state_owner(sp);
324d003b 2053 nfs_sb_deactive_async(sb);
9512135d
TM		 2054 kfree(calldata);
2055}
2056
88069f77
TM		 2057static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2058 fmode_t fmode)
2059{
2060 spin_lock(&state->owner->so_lock);
2061 if (!(fmode & FMODE_READ))
2062 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2063 if (!(fmode & FMODE_WRITE))
2064 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2065 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2066 spin_unlock(&state->owner->so_lock);
2067}
2068
963d8fe5 2069static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2070{
963d8fe5 2071 struct nfs4_closedata *calldata = data;
1da177e4 2072 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2073 struct nfs_server *server = NFS_SERVER(calldata->inode);
2074
a3ca5651 2075 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2076 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2077 return;
1da177e4
LT		 2078 /* hmm. we are done with the inode, and in the process of freeing
2079 * the state_owner. we keep this around to process errors
2080 */
1da177e4
LT		 2081 switch (task->tk_status) {
2082 case 0:
f7e8917a
FI		 2083 if (calldata->roc)
2084 pnfs_roc_set_barrier(state->inode,
2085 calldata->roc_barrier);
45328c35 2086 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2087 renew_lease(server, calldata->timestamp);
88069f77
TM		 2088 nfs4_close_clear_stateid_flags(state,
2089 calldata->arg.fmode);
1da177e4
LT		 2090 break;
2091 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2092 case -NFS4ERR_OLD_STATEID:
2093 case -NFS4ERR_BAD_STATEID:
1da177e4 2094 case -NFS4ERR_EXPIRED:
dc0b027d 2095 if (calldata->arg.fmode == 0)
9e33bed5 2096 break;
1da177e4 2097 default:
72211dbe
TM		 2098 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2099 rpc_restart_call_prepare(task);
1da177e4 2100 }
72211dbe 2101 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2102 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2103 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2104}
2105
4ce70ada 2106static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2107{
4ce70ada 2108 struct nfs4_closedata *calldata = data;
9512135d 2109 struct nfs4_state *state = calldata->state;
7fdab069 2110 struct inode *inode = calldata->inode;
88069f77 2111 int call_close = 0;
9512135d 2112
a3ca5651 2113 dprintk("%s: begin!\n", __func__);
963d8fe5 2114 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2115 return;
003707c7 2116
88069f77
TM		 2117 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2118 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2119 spin_lock(&state->owner->so_lock);
003707c7 2120 /* Calculate the change in open mode */
e7616923 2121 if (state->n_rdwr == 0) {
003707c7 2122 if (state->n_rdonly == 0) {
88069f77
TM		 2123 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2124 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2125 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2126 }
2127 if (state->n_wronly == 0) {
88069f77
TM		 2128 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2129 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2130 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2131 }
e7616923 2132 }
4cecb76f 2133 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2134
2135 if (!call_close) {
963d8fe5
TM		 2136 /* Note: exit _without_ calling nfs4_close_done */
2137 task->tk_action = NULL;
a3ca5651 2138 goto out;
9512135d 2139 }
88069f77 2140
f7e8917a 2141 if (calldata->arg.fmode == 0) {
88069f77 2142 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2143 if (calldata->roc &&
7fdab069 2144 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2145 goto out;
f7e8917a 2146 }
88069f77 2147
516a6af6 2148 nfs_fattr_init(calldata->res.fattr);
26e976a8 2149 calldata->timestamp = jiffies;
7fdab069 2150 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2151 &calldata->arg.seq_args,
2152 &calldata->res.seq_res,
2240a9e2
TM		 2153 task) != 0)
2154 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2155out:
2156 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2157}
2158
963d8fe5 2159static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2160 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2161 .rpc_call_done = nfs4_close_done,
2162 .rpc_release = nfs4_free_closedata,
2163};
2164
1da177e4
LT		 2165/*
2166 * It is possible for data to be read/written from a mem-mapped file
2167 * after the sys_close call (which hits the vfs layer as a flush).
2168 * This means that we can't safely call nfsv4 close on a file until
2169 * the inode is cleared. This in turn means that we are not good
2170 * NFSv4 citizens - we do not indicate to the server to update the file's
2171 * share state even when we are done with one of the three share
2172 * stateid's in the inode.
2173 *
2174 * NOTE: Caller must be holding the sp->so_owner semaphore!
2175 */
1f7977c1 2176int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2177{
4a35bd41 2178 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2179 struct nfs4_closedata *calldata;
b39e625b
TM		 2180 struct nfs4_state_owner *sp = state->owner;
2181 struct rpc_task *task;
5138fde0
TM		 2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2184 .rpc_cred = state->owner->so_cred,
2185 };
c970aa85
TM		 2186 struct rpc_task_setup task_setup_data = {
2187 .rpc_client = server->client,
5138fde0 2188 .rpc_message = &msg,
c970aa85 2189 .callback_ops = &nfs4_close_ops,
101070ca 2190 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2191 .flags = RPC_TASK_ASYNC,
2192 };
9512135d 2193 int status = -ENOMEM;
1da177e4 2194
8535b2be 2195 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2196 if (calldata == NULL)
9512135d 2197 goto out;
9d12b216 2198 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2199 calldata->inode = state->inode;
1da177e4 2200 calldata->state = state;
4a35bd41 2201 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2202 calldata->arg.stateid = &state->open_stateid;
1da177e4 2203 /* Serialization for the sequence id */
8535b2be 2204 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2205 if (calldata->arg.seqid == NULL)
2206 goto out_free_calldata;
dc0b027d 2207 calldata->arg.fmode = 0;
a65318bf 2208 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2209 calldata->res.fattr = &calldata->fattr;
c1d51931 2210 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2211 calldata->res.server = server;
1f7977c1 2212 calldata->roc = pnfs_roc(state->inode);
643168c2 2213 nfs_sb_active(calldata->inode->i_sb);
9512135d 2214
1174dd1f
TM		 2215 msg.rpc_argp = &calldata->arg;
2216 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2217 task_setup_data.callback_data = calldata;
2218 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2219 if (IS_ERR(task))
2220 return PTR_ERR(task);
a49c3c77
TM		 2221 status = 0;
2222 if (wait)
2223 status = rpc_wait_for_completion_task(task);
b39e625b 2224 rpc_put_task(task);
a49c3c77 2225 return status;
9512135d
TM		 2226out_free_calldata:
2227 kfree(calldata);
2228out:
b39e625b
TM		 2229 nfs4_put_open_state(state);
2230 nfs4_put_state_owner(sp);
9512135d 2231 return status;
1da177e4
LT		 2232}
2233
2b484297 2234static struct inode *
cd9a1c0e 2235nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2236{
1da177e4 2237 struct nfs4_state *state;
1da177e4 2238
565277f6 2239 /* Protect against concurrent sillydeletes */
82be417a
AA		 2240 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2241 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2242 if (IS_ERR(state))
2243 return ERR_CAST(state);
cd9a1c0e 2244 ctx->state = state;
f46e0bd3 2245 return igrab(state->inode);
1da177e4
LT		 2246}
2247
1185a552 2248static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2249{
2250 if (ctx->state == NULL)
2251 return;
2252 if (is_sync)
643168c2 2253 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2254 else
643168c2 2255 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2256}
1da177e4
LT		 2257
2258static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2259{
43652ad5
BH		 2260 struct nfs4_server_caps_arg args = {
2261 .fhandle = fhandle,
2262 };
1da177e4
LT		 2263 struct nfs4_server_caps_res res = {};
2264 struct rpc_message msg = {
2265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2266 .rpc_argp = &args,
1da177e4
LT		 2267 .rpc_resp = &res,
2268 };
2269 int status;
2270
7c513058 2271 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2272 if (status == 0) {
2273 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2274 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2275 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2276 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2277 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2278 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2279 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2280 server->caps |= NFS_CAP_ACLS;
2281 if (res.has_links != 0)
2282 server->caps |= NFS_CAP_HARDLINKS;
2283 if (res.has_symlinks != 0)
2284 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2285 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2286 server->caps |= NFS_CAP_FILEID;
2287 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2288 server->caps |= NFS_CAP_MODE;
2289 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2290 server->caps |= NFS_CAP_NLINK;
2291 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2292 server->caps |= NFS_CAP_OWNER;
2293 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2294 server->caps |= NFS_CAP_OWNER_GROUP;
2295 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2296 server->caps |= NFS_CAP_ATIME;
2297 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2298 server->caps |= NFS_CAP_CTIME;
2299 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2300 server->caps |= NFS_CAP_MTIME;
2301
a65318bf
TM		 2302 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2303 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2304 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2305 server->acl_bitmask = res.acl_bitmask;
264e6351 2306 server->fh_expire_type = res.fh_expire_type;
1da177e4 2307 }
cccef3b9 2308
1da177e4
LT		 2309 return status;
2310}
2311
55a97593 2312int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2313{
2314 struct nfs4_exception exception = { };
2315 int err;
2316 do {
2317 err = nfs4_handle_exception(server,
2318 _nfs4_server_capabilities(server, fhandle),
2319 &exception);
2320 } while (exception.retry);
2321 return err;
2322}
2323
2324static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2325 struct nfs_fsinfo *info)
2326{
1da177e4
LT		 2327 struct nfs4_lookup_root_arg args = {
2328 .bitmask = nfs4_fattr_bitmap,
2329 };
2330 struct nfs4_lookup_res res = {
2331 .server = server,
0e574af1 2332 .fattr = info->fattr,
1da177e4
LT		 2333 .fh = fhandle,
2334 };
2335 struct rpc_message msg = {
2336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2337 .rpc_argp = &args,
2338 .rpc_resp = &res,
2339 };
008f55d0 2340
0e574af1 2341 nfs_fattr_init(info->fattr);
7c513058 2342 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2343}
2344
2345static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2346 struct nfs_fsinfo *info)
2347{
2348 struct nfs4_exception exception = { };
2349 int err;
2350 do {
fb8a5ba8
BS		 2351 err = _nfs4_lookup_root(server, fhandle, info);
2352 switch (err) {
2353 case 0:
2354 case -NFS4ERR_WRONGSEC:
05e9cfb4 2355 goto out;
fb8a5ba8
BS		 2356 default:
2357 err = nfs4_handle_exception(server, err, &exception);
2358 }
1da177e4 2359 } while (exception.retry);
05e9cfb4 2360out:
1da177e4
LT		 2361 return err;
2362}
2363
8f70e95f
BS		 2364static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2365 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2366{
2367 struct rpc_auth *auth;
2368 int ret;
2369
2370 auth = rpcauth_create(flavor, server->client);
e8d920c5 2371 if (IS_ERR(auth)) {
8f70e95f
BS		 2372 ret = -EIO;
2373 goto out;
2374 }
2375 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2376out:
2377 return ret;
2378}
2379
801a16dc 2380static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2381 struct nfs_fsinfo *info)
1da177e4 2382{
8f70e95f 2383 int i, len, status = 0;
0fabee24 2384 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2385
6a1a1e34 2386 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2387 if (len < 0)
2388 return len;
8f70e95f
BS		 2389
2390 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2391 /* AUTH_UNIX is the default flavor if none was specified,
2392 * thus has already been tried. */
2393 if (flav_array[i] == RPC_AUTH_UNIX)
2394 continue;
2395
8f70e95f 2396 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2397 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2398 continue;
2399 break;
8f70e95f 2400 }
fb8a5ba8
BS		 2401 /*
2402 * -EACCESS could mean that the user doesn't have correct permissions
2403 * to access the mount. It could also mean that we tried to mount
2404 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2405 * existing mount programs don't handle -EACCES very well so it should
2406 * be mapped to -EPERM instead.
2407 */
2408 if (status == -EACCES)
2409 status = -EPERM;
801a16dc
BS		 2410 return status;
2411}
2412
2413/*
2414 * get the file handle for the "/" directory on the server
2415 */
3028eb2b
BS		 2416int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2417 struct nfs_fsinfo *info)
801a16dc 2418{
fca78d6d 2419 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2420 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2421 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2422 /*
2423 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2424 * by nfs4_map_errors() as this function exits.
2425 */
fca78d6d 2426 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2427 if (status == 0)
2428 status = nfs4_server_capabilities(server, fhandle);
2429 if (status == 0)
2430 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2431 return nfs4_map_errors(status);
1da177e4
LT		 2432}
2433
bae36241
BS		 2434static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2435 struct nfs_fsinfo *info)
2436{
2437 int error;
2438 struct nfs_fattr *fattr = info->fattr;
2439
2440 error = nfs4_server_capabilities(server, mntfh);
2441 if (error < 0) {
2442 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2443 return error;
2444 }
2445
2446 error = nfs4_proc_getattr(server, mntfh, fattr);
2447 if (error < 0) {
2448 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2449 return error;
2450 }
2451
2452 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2453 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2454 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2455
2456 return error;
2457}
2458
6b97fd3d
MN		 2459/*
2460 * Get locations and (maybe) other attributes of a referral.
2461 * Note that we'll actually follow the referral later when
2462 * we detect fsid mismatch in inode revalidation
2463 */
f05d147f
BS		 2464static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2465 const struct qstr *name, struct nfs_fattr *fattr,
2466 struct nfs_fh *fhandle)
6b97fd3d
MN		 2467{
2468 int status = -ENOMEM;
2469 struct page *page = NULL;
2470 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2471
2472 page = alloc_page(GFP_KERNEL);
2473 if (page == NULL)
2474 goto out;
2475 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2476 if (locations == NULL)
2477 goto out;
2478
f05d147f 2479 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2480 if (status != 0)
2481 goto out;
2482 /* Make sure server returned a different fsid for the referral */
2483 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2484 dprintk("%s: server did not return a different fsid for"
2485 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2486 status = -EIO;
2487 goto out;
2488 }
533eb461
AA		 2489 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2490 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2491
533eb461 2492 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2493 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2494 memset(fhandle, 0, sizeof(struct nfs_fh));
2495out:
2496 if (page)
2497 __free_page(page);
5d7ca35a 2498 kfree(locations);
6b97fd3d
MN		 2499 return status;
2500}
2501
1da177e4
LT		 2502static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2503{
2504 struct nfs4_getattr_arg args = {
2505 .fh = fhandle,
2506 .bitmask = server->attr_bitmask,
2507 };
2508 struct nfs4_getattr_res res = {
2509 .fattr = fattr,
2510 .server = server,
2511 };
2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2514 .rpc_argp = &args,
2515 .rpc_resp = &res,
2516 };
2517
0e574af1 2518 nfs_fattr_init(fattr);
7c513058 2519 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2520}
2521
2522static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2523{
2524 struct nfs4_exception exception = { };
2525 int err;
2526 do {
2527 err = nfs4_handle_exception(server,
2528 _nfs4_proc_getattr(server, fhandle, fattr),
2529 &exception);
2530 } while (exception.retry);
2531 return err;
2532}
2533
2534/*
2535 * The file is not closed if it is opened due to the a request to change
2536 * the size of the file. The open call will not be needed once the
2537 * VFS layer lookup-intents are implemented.
2538 *
2539 * Close is called when the inode is destroyed.
2540 * If we haven't opened the file for O_WRONLY, we
2541 * need to in the size_change case to obtain a stateid.
2542 *
2543 * Got race?
2544 * Because OPEN is always done by name in nfsv4, it is
2545 * possible that we opened a different file by the same
2546 * name. We can recognize this race condition, but we
2547 * can't do anything about it besides returning an error.
2548 *
2549 * This will be fixed with VFS changes (lookup-intent).
2550 */
2551static int
2552nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2553 struct iattr *sattr)
2554{
08e9eac4 2555 struct inode *inode = dentry->d_inode;
659bfcd6 2556 struct rpc_cred *cred = NULL;
d530838b 2557 struct nfs4_state *state = NULL;
1da177e4
LT		 2558 int status;
2559
8a1636c4
BH		 2560 if (pnfs_ld_layoutret_on_setattr(inode))
2561 pnfs_return_layout(inode);
2562
0e574af1 2563 nfs_fattr_init(fattr);
1da177e4 2564
2669940d
AA		 2565 /* Deal with open(O_TRUNC) */
2566 if (sattr->ia_valid & ATTR_OPEN)
2567 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2568
2569 /* Optimization: if the end result is no change, don't RPC */
2570 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2571 return 0;
2572
d530838b 2573 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2574 if (sattr->ia_valid & ATTR_FILE) {
2575 struct nfs_open_context *ctx;
2576
2577 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2578 if (ctx) {
2579 cred = ctx->cred;
2580 state = ctx->state;
2581 }
659bfcd6 2582 }
08e9eac4 2583
659bfcd6 2584 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2585 if (status == 0)
2586 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2587 return status;
2588}
2589
0c2e53f1
TM		 2590static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2591 const struct qstr *name, struct nfs_fh *fhandle,
2592 struct nfs_fattr *fattr)
2b3de441 2593{
0c2e53f1 2594 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2595 int status;
2596 struct nfs4_lookup_arg args = {
2597 .bitmask = server->attr_bitmask,
0c2e53f1 2598 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2599 .name = name,
2600 };
2601 struct nfs4_lookup_res res = {
2602 .server = server,
2603 .fattr = fattr,
2604 .fh = fhandle,
2605 };
2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2608 .rpc_argp = &args,
2609 .rpc_resp = &res,
2610 };
2611
2612 nfs_fattr_init(fattr);
2613
1da177e4 2614 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2615 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2616 dprintk("NFS reply lookup: %d\n", status);
2617 return status;
2618}
2619
72de53ec 2620static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2621{
7ebb9315 2622 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2623 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2624 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2625 fattr->nlink = 2;
2626}
2627
72de53ec
BS		 2628static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2629 struct qstr *name, struct nfs_fh *fhandle,
2630 struct nfs_fattr *fattr)
1da177e4
LT		 2631{
2632 struct nfs4_exception exception = { };
72de53ec 2633 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2634 int err;
2635 do {
72de53ec
BS		 2636 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2637 switch (err) {
08ef7bd3 2638 case -NFS4ERR_BADNAME:
72de53ec
BS		 2639 err = -ENOENT;
2640 goto out;
0c2e53f1 2641 case -NFS4ERR_MOVED:
f05d147f 2642 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2643 goto out;
0c2e53f1 2644 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2645 err = -EPERM;
2646 if (client != *clnt)
2647 goto out;
2648
2649 client = nfs4_create_sec_client(client, dir, name);
2650 if (IS_ERR(client))
2651 return PTR_ERR(client);
2652
2653 exception.retry = 1;
2654 break;
2655 default:
2656 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2657 }
1da177e4 2658 } while (exception.retry);
72de53ec
BS		 2659
2660out:
2661 if (err == 0)
2662 *clnt = client;
2663 else if (client != *clnt)
2664 rpc_shutdown_client(client);
2665
1da177e4
LT		 2666 return err;
2667}
2668
80a16b21 2669static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2670 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2671{
2672 int status;
2673 struct rpc_clnt *client = NFS_CLIENT(dir);
2674
2675 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2676 if (client != NFS_CLIENT(dir)) {
2677 rpc_shutdown_client(client);
2678 nfs_fixup_secinfo_attributes(fattr);
2679 }
2680 return status;
2681}
2682
f05d147f
BS		 2683struct rpc_clnt *
2684nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2685 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2686{
2687 int status;
2688 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2689
2690 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2691 if (status < 0) {
2692 rpc_shutdown_client(client);
2693 return ERR_PTR(status);
2694 }
2695 return client;
2696}
2697
1da177e4
LT		 2698static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2699{
76b32999 2700 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2701 struct nfs4_accessargs args = {
2702 .fh = NFS_FH(inode),
a4980e78 2703 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2704 };
2705 struct nfs4_accessres res = {
2706 .server = server,
1da177e4 2707 };
1da177e4
LT		 2708 struct rpc_message msg = {
2709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2710 .rpc_argp = &args,
2711 .rpc_resp = &res,
2712 .rpc_cred = entry->cred,
2713 };
2714 int mode = entry->mask;
2715 int status;
2716
2717 /*
2718 * Determine which access bits we want to ask for...
2719 */
2720 if (mode & MAY_READ)
2721 args.access |= NFS4_ACCESS_READ;
2722 if (S_ISDIR(inode->i_mode)) {
2723 if (mode & MAY_WRITE)
2724 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2725 if (mode & MAY_EXEC)
2726 args.access |= NFS4_ACCESS_LOOKUP;
2727 } else {
2728 if (mode & MAY_WRITE)
2729 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2730 if (mode & MAY_EXEC)
2731 args.access |= NFS4_ACCESS_EXECUTE;
2732 }
c407d41a
TM		 2733
2734 res.fattr = nfs_alloc_fattr();
2735 if (res.fattr == NULL)
2736 return -ENOMEM;
2737
7c513058 2738 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2739 if (!status) {
6168f62c 2740 nfs_access_set_mask(entry, res.access);
c407d41a 2741 nfs_refresh_inode(inode, res.fattr);
1da177e4 2742 }
c407d41a 2743 nfs_free_fattr(res.fattr);
1da177e4
LT		 2744 return status;
2745}
2746
2747static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2748{
2749 struct nfs4_exception exception = { };
2750 int err;
2751 do {
2752 err = nfs4_handle_exception(NFS_SERVER(inode),
2753 _nfs4_proc_access(inode, entry),
2754 &exception);
2755 } while (exception.retry);
2756 return err;
2757}
2758
2759/*
2760 * TODO: For the time being, we don't try to get any attributes
2761 * along with any of the zero-copy operations READ, READDIR,
2762 * READLINK, WRITE.
2763 *
2764 * In the case of the first three, we want to put the GETATTR
2765 * after the read-type operation -- this is because it is hard
2766 * to predict the length of a GETATTR response in v4, and thus
2767 * align the READ data correctly. This means that the GETATTR
2768 * may end up partially falling into the page cache, and we should
2769 * shift it into the 'tail' of the xdr_buf before processing.
2770 * To do this efficiently, we need to know the total length
2771 * of data received, which doesn't seem to be available outside
2772 * of the RPC layer.
2773 *
2774 * In the case of WRITE, we also want to put the GETATTR after
2775 * the operation -- in this case because we want to make sure
140150db 2776 * we get the post-operation mtime and size.
1da177e4
LT		 2777 *
2778 * Both of these changes to the XDR layer would in fact be quite
2779 * minor, but I decided to leave them for a subsequent patch.
2780 */
2781static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2782 unsigned int pgbase, unsigned int pglen)
2783{
2784 struct nfs4_readlink args = {
2785 .fh = NFS_FH(inode),
2786 .pgbase = pgbase,
2787 .pglen = pglen,
2788 .pages = &page,
2789 };
f50c7000 2790 struct nfs4_readlink_res res;
1da177e4
LT		 2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2793 .rpc_argp = &args,
f50c7000 2794 .rpc_resp = &res,
1da177e4
LT		 2795 };
2796
7c513058 2797 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2798}
2799
2800static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2801 unsigned int pgbase, unsigned int pglen)
2802{
2803 struct nfs4_exception exception = { };
2804 int err;
2805 do {
2806 err = nfs4_handle_exception(NFS_SERVER(inode),
2807 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2808 &exception);
2809 } while (exception.retry);
2810 return err;
2811}
2812
1da177e4 2813/*
8867fe58 2814 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2815 */
1da177e4
LT		 2816static int
2817nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2818 int flags)
1da177e4 2819{
8867fe58 2820 struct nfs_open_context *ctx;
1da177e4 2821 struct nfs4_state *state;
1da177e4
LT		 2822 int status = 0;
2823
8867fe58
MS		 2824 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2825 if (IS_ERR(ctx))
2826 return PTR_ERR(ctx);
2827
a8a5da99 2828 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2829 state = nfs4_do_open(dir, dentry, ctx->mode,
2830 flags, sattr, ctx->cred,
2831 &ctx->mdsthreshold);
d4d9cdcb 2832 d_drop(dentry);
1da177e4
LT		 2833 if (IS_ERR(state)) {
2834 status = PTR_ERR(state);
c0204fd2 2835 goto out;
1da177e4 2836 }
d4d9cdcb 2837 d_add(dentry, igrab(state->inode));
d75340cc 2838 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2839 ctx->state = state;
1da177e4 2840out:
8867fe58 2841 put_nfs_open_context(ctx);
1da177e4
LT		 2842 return status;
2843}
2844
2845static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2846{
16e42959 2847 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2848 struct nfs_removeargs args = {
1da177e4 2849 .fh = NFS_FH(dir),
26fe5750 2850 .name = *name,
16e42959 2851 };
4fdc17b2 2852 struct nfs_removeres res = {
16e42959 2853 .server = server,
1da177e4 2854 };
1da177e4 2855 struct rpc_message msg = {
4fdc17b2
TM		 2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2857 .rpc_argp = &args,
2858 .rpc_resp = &res,
1da177e4 2859 };
778d2817 2860 int status;
1da177e4 2861
7c513058 2862 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2863 if (status == 0)
16e42959 2864 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2865 return status;
2866}
2867
2868static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2869{
2870 struct nfs4_exception exception = { };
2871 int err;
2872 do {
2873 err = nfs4_handle_exception(NFS_SERVER(dir),
2874 _nfs4_proc_remove(dir, name),
2875 &exception);
2876 } while (exception.retry);
2877 return err;
2878}
2879
e4eff1a6 2880static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2881{
e4eff1a6
TM		 2882 struct nfs_server *server = NFS_SERVER(dir);
2883 struct nfs_removeargs *args = msg->rpc_argp;
2884 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2885
e4eff1a6 2886 res->server = server;
1da177e4 2887 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2888 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2889}
2890
34e137cc
BS		 2891static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2892{
d9afbd1b
TM		 2893 nfs4_setup_sequence(NFS_SERVER(data->dir),
2894 &data->args.seq_args,
2895 &data->res.seq_res,
2896 task);
1da177e4
LT		 2897}
2898
e4eff1a6 2899static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2900{
e4eff1a6
TM		 2901 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2902
14516c3a
TM		 2903 if (!nfs4_sequence_done(task, &res->seq_res))
2904 return 0;
9e33bed5 2905 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2906 return 0;
2907 update_changeattr(dir, &res->cinfo);
e4eff1a6 2908 return 1;
1da177e4
LT		 2909}
2910
d3d4152a
JL		 2911static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2912{
2913 struct nfs_server *server = NFS_SERVER(dir);
2914 struct nfs_renameargs *arg = msg->rpc_argp;
2915 struct nfs_renameres *res = msg->rpc_resp;
2916
2917 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2918 res->server = server;
9d12b216 2919 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2920}
2921
c6bfa1a1
BS		 2922static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2923{
d9afbd1b
TM		 2924 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2925 &data->args.seq_args,
2926 &data->res.seq_res,
2927 task);
d3d4152a
JL		 2928}
2929
2930static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2931 struct inode *new_dir)
2932{
2933 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2934
2935 if (!nfs4_sequence_done(task, &res->seq_res))
2936 return 0;
2937 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2938 return 0;
2939
2940 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2941 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2942 return 1;
2943}
2944
1da177e4
LT		 2945static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2946 struct inode *new_dir, struct qstr *new_name)
2947{
6caf2c82 2948 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2949 struct nfs_renameargs arg = {
1da177e4
LT		 2950 .old_dir = NFS_FH(old_dir),
2951 .new_dir = NFS_FH(new_dir),
2952 .old_name = old_name,
2953 .new_name = new_name,
6caf2c82 2954 };
e8582a8b 2955 struct nfs_renameres res = {
6caf2c82 2956 .server = server,
1da177e4 2957 };
1da177e4
LT		 2958 struct rpc_message msg = {
2959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2960 .rpc_argp = &arg,
2961 .rpc_resp = &res,
2962 };
011fff72 2963 int status = -ENOMEM;
1da177e4 2964
7c513058 2965 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2966 if (!status) {
2967 update_changeattr(old_dir, &res.old_cinfo);
2968 update_changeattr(new_dir, &res.new_cinfo);
2969 }
2970 return status;
2971}
2972
2973static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2974 struct inode *new_dir, struct qstr *new_name)
2975{
2976 struct nfs4_exception exception = { };
2977 int err;
2978 do {
2979 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2980 _nfs4_proc_rename(old_dir, old_name,
2981 new_dir, new_name),
2982 &exception);
2983 } while (exception.retry);
2984 return err;
2985}
2986
2987static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2988{
91ba2eee 2989 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2990 struct nfs4_link_arg arg = {
2991 .fh = NFS_FH(inode),
2992 .dir_fh = NFS_FH(dir),
2993 .name = name,
91ba2eee
TM		 2994 .bitmask = server->attr_bitmask,
2995 };
91ba2eee
TM		 2996 struct nfs4_link_res res = {
2997 .server = server,
1da177e4 2998 };
1da177e4
LT		 2999 struct rpc_message msg = {
3000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3001 .rpc_argp = &arg,
91ba2eee 3002 .rpc_resp = &res,
1da177e4 3003 };
136f2627
TM		 3004 int status = -ENOMEM;
3005
3006 res.fattr = nfs_alloc_fattr();
778d2817 3007 if (res.fattr == NULL)
136f2627 3008 goto out;
1da177e4 3009
7c513058 3010 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3011 if (!status) {
3012 update_changeattr(dir, &res.cinfo);
73a3d07c 3013 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3014 }
136f2627 3015out:
136f2627 3016 nfs_free_fattr(res.fattr);
1da177e4
LT		 3017 return status;
3018}
3019
3020static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3021{
3022 struct nfs4_exception exception = { };
3023 int err;
3024 do {
3025 err = nfs4_handle_exception(NFS_SERVER(inode),
3026 _nfs4_proc_link(inode, dir, name),
3027 &exception);
3028 } while (exception.retry);
3029 return err;
3030}
3031
57dc9a57
TM		 3032struct nfs4_createdata {
3033 struct rpc_message msg;
3034 struct nfs4_create_arg arg;
3035 struct nfs4_create_res res;
3036 struct nfs_fh fh;
3037 struct nfs_fattr fattr;
57dc9a57
TM		 3038};
3039
3040static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3041 struct qstr *name, struct iattr *sattr, u32 ftype)
3042{
3043 struct nfs4_createdata *data;
3044
3045 data = kzalloc(sizeof(*data), GFP_KERNEL);
3046 if (data != NULL) {
3047 struct nfs_server *server = NFS_SERVER(dir);
3048
3049 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3050 data->msg.rpc_argp = &data->arg;
3051 data->msg.rpc_resp = &data->res;
3052 data->arg.dir_fh = NFS_FH(dir);
3053 data->arg.server = server;
3054 data->arg.name = name;
3055 data->arg.attrs = sattr;
3056 data->arg.ftype = ftype;
3057 data->arg.bitmask = server->attr_bitmask;
3058 data->res.server = server;
3059 data->res.fh = &data->fh;
3060 data->res.fattr = &data->fattr;
57dc9a57 3061 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3062 }
3063 return data;
3064}
3065
3066static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3067{
7c513058 3068 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3069 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3070 if (status == 0) {
3071 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3072 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3073 }
3074 return status;
3075}
3076
3077static void nfs4_free_createdata(struct nfs4_createdata *data)
3078{
3079 kfree(data);
3080}
3081
4f390c15 3082static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3083 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3084{
57dc9a57
TM		 3085 struct nfs4_createdata *data;
3086 int status = -ENAMETOOLONG;
1da177e4 3087
94a6d753 3088 if (len > NFS4_MAXPATHLEN)
57dc9a57 3089 goto out;
4f390c15 3090
57dc9a57
TM		 3091 status = -ENOMEM;
3092 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3093 if (data == NULL)
3094 goto out;
3095
3096 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3097 data->arg.u.symlink.pages = &page;
3098 data->arg.u.symlink.len = len;
1da177e4 3099
57dc9a57
TM		 3100 status = nfs4_do_create(dir, dentry, data);
3101
3102 nfs4_free_createdata(data);
3103out:
1da177e4
LT		 3104 return status;
3105}
3106
4f390c15 3107static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3108 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3109{
3110 struct nfs4_exception exception = { };
3111 int err;
3112 do {
3113 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3114 _nfs4_proc_symlink(dir, dentry, page,
3115 len, sattr),
1da177e4
LT		 3116 &exception);
3117 } while (exception.retry);
3118 return err;
3119}
3120
3121static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3122 struct iattr *sattr)
3123{
57dc9a57
TM		 3124 struct nfs4_createdata *data;
3125 int status = -ENOMEM;
1da177e4 3126
57dc9a57
TM		 3127 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3128 if (data == NULL)
3129 goto out;
3130
3131 status = nfs4_do_create(dir, dentry, data);
3132
3133 nfs4_free_createdata(data);
3134out:
1da177e4
LT		 3135 return status;
3136}
3137
3138static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3139 struct iattr *sattr)
3140{
3141 struct nfs4_exception exception = { };
3142 int err;
a8a5da99
AK		 3143
3144 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3145 do {
3146 err = nfs4_handle_exception(NFS_SERVER(dir),
3147 _nfs4_proc_mkdir(dir, dentry, sattr),
3148 &exception);
3149 } while (exception.retry);
3150 return err;
3151}
3152
3153static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3154 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3155{
3156 struct inode *dir = dentry->d_inode;
3157 struct nfs4_readdir_arg args = {
3158 .fh = NFS_FH(dir),
56e4ebf8 3159 .pages = pages,
1da177e4
LT		 3160 .pgbase = 0,
3161 .count = count,
96d25e53 3162 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3163 .plus = plus,
1da177e4
LT		 3164 };
3165 struct nfs4_readdir_res res;
3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3168 .rpc_argp = &args,
3169 .rpc_resp = &res,
3170 .rpc_cred = cred,
3171 };
3172 int status;
3173
3110ff80 3174 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3175 dentry->d_parent->d_name.name,
3176 dentry->d_name.name,
3177 (unsigned long long)cookie);
c3f52af3 3178 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3179 res.pgbase = args.pgbase;
7c513058 3180 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3181 if (status >= 0) {
c3f52af3 3182 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3183 status += args.pgbase;
3184 }
c4812998
TM		 3185
3186 nfs_invalidate_atime(dir);
3187
3110ff80 3188 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3189 return status;
3190}
3191
3192static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3193 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3194{
3195 struct nfs4_exception exception = { };
3196 int err;
3197 do {
3198 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3199 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3200 pages, count, plus),
1da177e4
LT		 3201 &exception);
3202 } while (exception.retry);
3203 return err;
3204}
3205
3206static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3207 struct iattr *sattr, dev_t rdev)
3208{
57dc9a57
TM		 3209 struct nfs4_createdata *data;
3210 int mode = sattr->ia_mode;
3211 int status = -ENOMEM;
1da177e4 3212
57dc9a57
TM		 3213 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3214 if (data == NULL)
3215 goto out;
3216
1da177e4 3217 if (S_ISFIFO(mode))
57dc9a57 3218 data->arg.ftype = NF4FIFO;
1da177e4 3219 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3220 data->arg.ftype = NF4BLK;
3221 data->arg.u.device.specdata1 = MAJOR(rdev);
3222 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3223 }
3224 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3225 data->arg.ftype = NF4CHR;
3226 data->arg.u.device.specdata1 = MAJOR(rdev);
3227 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3228 } else if (!S_ISSOCK(mode)) {
3229 status = -EINVAL;
3230 goto out_free;
1da177e4 3231 }
1da177e4 3232
57dc9a57 3233 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3234out_free:
57dc9a57
TM		 3235 nfs4_free_createdata(data);
3236out:
1da177e4
LT		 3237 return status;
3238}
3239
3240static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3241 struct iattr *sattr, dev_t rdev)
3242{
3243 struct nfs4_exception exception = { };
3244 int err;
a8a5da99
AK		 3245
3246 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3247 do {
3248 err = nfs4_handle_exception(NFS_SERVER(dir),
3249 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3250 &exception);
3251 } while (exception.retry);
3252 return err;
3253}
3254
3255static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3256 struct nfs_fsstat *fsstat)
3257{
3258 struct nfs4_statfs_arg args = {
3259 .fh = fhandle,
3260 .bitmask = server->attr_bitmask,
3261 };
24ad148a
BH		 3262 struct nfs4_statfs_res res = {
3263 .fsstat = fsstat,
3264 };
1da177e4
LT		 3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3267 .rpc_argp = &args,
24ad148a 3268 .rpc_resp = &res,
1da177e4
LT		 3269 };
3270
0e574af1 3271 nfs_fattr_init(fsstat->fattr);
7c513058 3272 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3273}
3274
3275static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3276{
3277 struct nfs4_exception exception = { };
3278 int err;
3279 do {
3280 err = nfs4_handle_exception(server,
3281 _nfs4_proc_statfs(server, fhandle, fsstat),
3282 &exception);
3283 } while (exception.retry);
3284 return err;
3285}
3286
3287static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3288 struct nfs_fsinfo *fsinfo)
3289{
3290 struct nfs4_fsinfo_arg args = {
3291 .fh = fhandle,
3292 .bitmask = server->attr_bitmask,
3293 };
3dda5e43
BH		 3294 struct nfs4_fsinfo_res res = {
3295 .fsinfo = fsinfo,
3296 };
1da177e4
LT		 3297 struct rpc_message msg = {
3298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3299 .rpc_argp = &args,
3dda5e43 3300 .rpc_resp = &res,
1da177e4
LT		 3301 };
3302
7c513058 3303 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3304}
3305
3306static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3307{
3308 struct nfs4_exception exception = { };
3309 int err;
3310
3311 do {
3312 err = nfs4_handle_exception(server,
3313 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3314 &exception);
3315 } while (exception.retry);
3316 return err;
3317}
3318
3319static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3320{
e38eb650
BS		 3321 int error;
3322
0e574af1 3323 nfs_fattr_init(fsinfo->fattr);
e38eb650 3324 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3325 if (error == 0) {
3326 /* block layout checks this! */
3327 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3328 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3329 }
e38eb650
BS		 3330
3331 return error;
1da177e4
LT		 3332}
3333
3334static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3335 struct nfs_pathconf *pathconf)
3336{
3337 struct nfs4_pathconf_arg args = {
3338 .fh = fhandle,
3339 .bitmask = server->attr_bitmask,
3340 };
d45b2989
BH		 3341 struct nfs4_pathconf_res res = {
3342 .pathconf = pathconf,
3343 };
1da177e4
LT		 3344 struct rpc_message msg = {
3345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3346 .rpc_argp = &args,
d45b2989 3347 .rpc_resp = &res,
1da177e4
LT		 3348 };
3349
3350 /* None of the pathconf attributes are mandatory to implement */
3351 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3352 memset(pathconf, 0, sizeof(*pathconf));
3353 return 0;
3354 }
3355
0e574af1 3356 nfs_fattr_init(pathconf->fattr);
7c513058 3357 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3358}
3359
3360static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_pathconf *pathconf)
3362{
3363 struct nfs4_exception exception = { };
3364 int err;
3365
3366 do {
3367 err = nfs4_handle_exception(server,
3368 _nfs4_proc_pathconf(server, fhandle, pathconf),
3369 &exception);
3370 } while (exception.retry);
3371 return err;
3372}
3373
d20581aa
BH		 3374void __nfs4_read_done_cb(struct nfs_read_data *data)
3375{
cd841605 3376 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3377}
3378
cbdabc7f 3379static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3380{
cd841605 3381 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3382
9e33bed5 3383 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3384 rpc_restart_call_prepare(task);
ec06c096 3385 return -EAGAIN;
1da177e4 3386 }
8850df99 3387
d20581aa 3388 __nfs4_read_done_cb(data);
1da177e4 3389 if (task->tk_status > 0)
ec06c096
TM		 3390 renew_lease(server, data->timestamp);
3391 return 0;
1da177e4
LT		 3392}
3393
cbdabc7f
AA		 3394static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3395{
3396
3397 dprintk("--> %s\n", __func__);
3398
3399 if (!nfs4_sequence_done(task, &data->res.seq_res))
3400 return -EAGAIN;
3401
d20581aa
BH		 3402 return data->read_done_cb ? data->read_done_cb(task, data) :
3403 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3404}
3405
bdc7f021 3406static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3407{
1da177e4 3408 data->timestamp = jiffies;
cbdabc7f 3409 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3410 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3411 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3412}
3413
ea7c3303
BS		 3414static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3415{
d9afbd1b
TM		 3416 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3417 &data->args.seq_args,
3418 &data->res.seq_res,
3419 task);
1da177e4
LT		 3420}
3421
b029bc9b 3422static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3423{
cd841605 3424 struct inode *inode = data->header->inode;
1da177e4 3425
9e33bed5 3426 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3427 rpc_restart_call_prepare(task);
788e7a89 3428 return -EAGAIN;
1da177e4 3429 }
4f9838c7 3430 if (task->tk_status >= 0) {
1da177e4 3431 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3432 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3433 }
788e7a89 3434 return 0;
1da177e4
LT		 3435}
3436
b029bc9b
FI		 3437static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3438{
3439 if (!nfs4_sequence_done(task, &data->res.seq_res))
3440 return -EAGAIN;
d20581aa
BH		 3441 return data->write_done_cb ? data->write_done_cb(task, data) :
3442 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3443}
3444
5a37f851
TM		 3445static
3446bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3447{
5a37f851
TM		 3448 const struct nfs_pgio_header *hdr = data->header;
3449
3450 /* Don't request attributes for pNFS or O_DIRECT writes */
3451 if (data->ds_clp != NULL || hdr->dreq != NULL)
3452 return false;
3453 /* Otherwise, request attributes if and only if we don't hold
3454 * a delegation
3455 */
011e2a7f 3456 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3457}
a69aef14 3458
bdc7f021 3459static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3460{
cd841605 3461 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3462
5a37f851 3463 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3464 data->args.bitmask = NULL;
3465 data->res.fattr = NULL;
3466 } else
3467 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3468
b029bc9b
FI		 3469 if (!data->write_done_cb)
3470 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3471 data->res.server = server;
1da177e4
LT		 3472 data->timestamp = jiffies;
3473
bdc7f021 3474 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3475 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3476}
3477
c6cb80d0
BS		 3478static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3479{
d9afbd1b
TM		 3480 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3481 &data->args.seq_args,
3482 &data->res.seq_res,
3483 task);
1da177e4
LT		 3484}
3485
0b7c0153 3486static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3487{
d9afbd1b
TM		 3488 nfs4_setup_sequence(NFS_SERVER(data->inode),
3489 &data->args.seq_args,
3490 &data->res.seq_res,
3491 task);
1da177e4
LT		 3492}
3493
0b7c0153 3494static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3495{
1da177e4 3496 struct inode *inode = data->inode;
14516c3a 3497
9e33bed5 3498 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3499 rpc_restart_call_prepare(task);
788e7a89 3500 return -EAGAIN;
1da177e4 3501 }
788e7a89 3502 return 0;
1da177e4
LT		 3503}
3504
0b7c0153 3505static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3506{
3507 if (!nfs4_sequence_done(task, &data->res.seq_res))
3508 return -EAGAIN;
0b7c0153 3509 return data->commit_done_cb(task, data);
5f452431
FI		 3510}
3511
0b7c0153 3512static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3513{
788e7a89 3514 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3515
0b7c0153
FI		 3516 if (data->commit_done_cb == NULL)
3517 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3518 data->res.server = server;
bdc7f021 3519 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3520 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3521}
3522
9bc4e3ca
CL		 3523struct nfs4_renewdata {
3524 struct nfs_client *client;
3525 unsigned long timestamp;
3526};
3527
1da177e4
LT		 3528/*
3529 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3530 * standalone procedure for queueing an asynchronous RENEW.
3531 */
9bc4e3ca 3532static void nfs4_renew_release(void *calldata)
dc96aef9 3533{
9bc4e3ca
CL		 3534 struct nfs4_renewdata *data = calldata;
3535 struct nfs_client *clp = data->client;
dc96aef9 3536
0851de06
AB		 3537 if (atomic_read(&clp->cl_count) > 1)
3538 nfs4_schedule_state_renewal(clp);
3539 nfs_put_client(clp);
9bc4e3ca 3540 kfree(data);
dc96aef9
AB		 3541}
3542
9bc4e3ca 3543static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3544{
9bc4e3ca
CL		 3545 struct nfs4_renewdata *data = calldata;
3546 struct nfs_client *clp = data->client;
3547 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3548
3549 if (task->tk_status < 0) {
95baa25c 3550 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3551 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3552 return;
3553 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3554 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3555 return;
3556 }
3557 nfs4_schedule_path_down_recovery(clp);
1da177e4 3558 }
452e9352 3559 do_renew_lease(clp, timestamp);
1da177e4
LT		 3560}
3561
963d8fe5
TM		 3562static const struct rpc_call_ops nfs4_renew_ops = {
3563 .rpc_call_done = nfs4_renew_done,
dc96aef9 3564 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3565};
3566
2f60ea6b 3567static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3568{
3569 struct rpc_message msg = {
3570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3571 .rpc_argp = clp,
b4454fe1 3572 .rpc_cred = cred,
1da177e4 3573 };
9bc4e3ca 3574 struct nfs4_renewdata *data;
1da177e4 3575
2f60ea6b
TM		 3576 if (renew_flags == 0)
3577 return 0;
0851de06
AB		 3578 if (!atomic_inc_not_zero(&clp->cl_count))
3579 return -EIO;
b569ad34 3580 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3581 if (data == NULL)
3582 return -ENOMEM;
3583 data->client = clp;
3584 data->timestamp = jiffies;
1da177e4 3585 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3586 &nfs4_renew_ops, data);
1da177e4
LT		 3587}
3588
8534d4ec 3589static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3590{
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3593 .rpc_argp = clp,
b4454fe1 3594 .rpc_cred = cred,
1da177e4
LT		 3595 };
3596 unsigned long now = jiffies;
3597 int status;
3598
3599 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3600 if (status < 0)
3601 return status;
452e9352 3602 do_renew_lease(clp, now);
1da177e4
LT		 3603 return 0;
3604}
3605
aa1870af
BF		 3606static inline int nfs4_server_supports_acls(struct nfs_server *server)
3607{
3608 return (server->caps & NFS_CAP_ACLS)
3609 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3610 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3611}
3612
21f498c2
TM		 3613/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3614 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3615 * the stack.
3616 */
21f498c2 3617#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3618
e9e3d724
NH		 3619static int buf_to_pages_noslab(const void *buf, size_t buflen,
3620 struct page **pages, unsigned int *pgbase)
3621{
3622 struct page *newpage, **spages;
3623 int rc = 0;
3624 size_t len;
3625 spages = pages;
3626
3627 do {
21f498c2 3628 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3629 newpage = alloc_page(GFP_KERNEL);
3630
3631 if (newpage == NULL)
3632 goto unwind;
3633 memcpy(page_address(newpage), buf, len);
3634 buf += len;
3635 buflen -= len;
3636 *pages++ = newpage;
3637 rc++;
3638 } while (buflen != 0);
3639
3640 return rc;
3641
3642unwind:
3643 for(; rc > 0; rc--)
3644 __free_page(spages[rc-1]);
3645 return -ENOMEM;
3646}
3647
e50a1c2e
BF		 3648struct nfs4_cached_acl {
3649 int cached;
3650 size_t len;
3e9d4154 3651 char data[0];
e50a1c2e
BF		 3652};
3653
3654static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3655{
3656 struct nfs_inode *nfsi = NFS_I(inode);
3657
3658 spin_lock(&inode->i_lock);
3659 kfree(nfsi->nfs4_acl);
3660 nfsi->nfs4_acl = acl;
3661 spin_unlock(&inode->i_lock);
3662}
3663
3664static void nfs4_zap_acl_attr(struct inode *inode)
3665{
3666 nfs4_set_cached_acl(inode, NULL);
3667}
3668
3669static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3670{
3671 struct nfs_inode *nfsi = NFS_I(inode);
3672 struct nfs4_cached_acl *acl;
3673 int ret = -ENOENT;
3674
3675 spin_lock(&inode->i_lock);
3676 acl = nfsi->nfs4_acl;
3677 if (acl == NULL)
3678 goto out;
3679 if (buf == NULL) /* user is just asking for length */
3680 goto out_len;
3681 if (acl->cached == 0)
3682 goto out;
3683 ret = -ERANGE; /* see getxattr(2) man page */
3684 if (acl->len > buflen)
3685 goto out;
3686 memcpy(buf, acl->data, acl->len);
3687out_len:
3688 ret = acl->len;
3689out:
3690 spin_unlock(&inode->i_lock);
3691 return ret;
3692}
3693
5794d21e 3694static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3695{
3696 struct nfs4_cached_acl *acl;
b291f1b1 3697 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3698
1f1ea6c2 3699 if (buflen <= PAGE_SIZE) {
b291f1b1 3700 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3701 if (acl == NULL)
3702 goto out;
3703 acl->cached = 1;
5794d21e 3704 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3705 } else {
3706 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3707 if (acl == NULL)
3708 goto out;
3709 acl->cached = 0;
3710 }
3711 acl->len = acl_len;
3712out:
3713 nfs4_set_cached_acl(inode, acl);
3714}
3715
bf118a34
AA		 3716/*
3717 * The getxattr API returns the required buffer length when called with a
3718 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3719 * the required buf. On a NULL buf, we send a page of data to the server
3720 * guessing that the ACL request can be serviced by a page. If so, we cache
3721 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3722 * the cache. If not so, we throw away the page, and cache the required
3723 * length. The next getxattr call will then produce another round trip to
3724 * the server, this time with the input buf of the required size.
3725 */
16b4289c 3726static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3727{
bf118a34 3728 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3729 struct nfs_getaclargs args = {
3730 .fh = NFS_FH(inode),
3731 .acl_pages = pages,
3732 .acl_len = buflen,
3733 };
663c79b3
BH		 3734 struct nfs_getaclres res = {
3735 .acl_len = buflen,
3736 };
aa1870af
BF		 3737 struct rpc_message msg = {
3738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3739 .rpc_argp = &args,
663c79b3 3740 .rpc_resp = &res,
aa1870af 3741 };
21f498c2
TM		 3742 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3743 int ret = -ENOMEM, i;
aa1870af 3744
bf118a34
AA		 3745 /* As long as we're doing a round trip to the server anyway,
3746 * let's be prepared for a page of acl data. */
3747 if (npages == 0)
3748 npages = 1;
21f498c2
TM		 3749 if (npages > ARRAY_SIZE(pages))
3750 return -ERANGE;
5a006899 3751
bf118a34
AA		 3752 for (i = 0; i < npages; i++) {
3753 pages[i] = alloc_page(GFP_KERNEL);
3754 if (!pages[i])
3755 goto out_free;
e50a1c2e 3756 }
5a006899
SP		 3757
3758 /* for decoding across pages */
3759 res.acl_scratch = alloc_page(GFP_KERNEL);
3760 if (!res.acl_scratch)
3761 goto out_free;
3762
bf118a34
AA		 3763 args.acl_len = npages * PAGE_SIZE;
3764 args.acl_pgbase = 0;
5a006899 3765
de040bec 3766 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3767 __func__, buf, buflen, npages, args.acl_len);
3768 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3769 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3770 if (ret)
3771 goto out_free;
bf118a34 3772
1f1ea6c2
TM		 3773 /* Handle the case where the passed-in buffer is too short */
3774 if (res.acl_flags & NFS4_ACL_TRUNC) {
3775 /* Did the user only issue a request for the acl length? */
3776 if (buf == NULL)
3777 goto out_ok;
e50a1c2e 3778 ret = -ERANGE;
1f1ea6c2 3779 goto out_free;
e50a1c2e 3780 }
1f1ea6c2
TM		 3781 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3782 if (buf)
3783 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3784out_ok:
3785 ret = res.acl_len;
e50a1c2e 3786out_free:
bf118a34
AA		 3787 for (i = 0; i < npages; i++)
3788 if (pages[i])
3789 __free_page(pages[i]);
331818f1
TM		 3790 if (res.acl_scratch)
3791 __free_page(res.acl_scratch);
aa1870af
BF		 3792 return ret;
3793}
3794
16b4289c
TM		 3795static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3796{
3797 struct nfs4_exception exception = { };
3798 ssize_t ret;
3799 do {
3800 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3801 if (ret >= 0)
3802 break;
3803 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3804 } while (exception.retry);
3805 return ret;
3806}
3807
e50a1c2e
BF		 3808static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3809{
3810 struct nfs_server *server = NFS_SERVER(inode);
3811 int ret;
3812
3813 if (!nfs4_server_supports_acls(server))
3814 return -EOPNOTSUPP;
3815 ret = nfs_revalidate_inode(server, inode);
3816 if (ret < 0)
3817 return ret;
08a22b39
AK		 3818 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3819 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3820 ret = nfs4_read_cached_acl(inode, buf, buflen);
3821 if (ret != -ENOENT)
bf118a34
AA		 3822 /* -ENOENT is returned if there is no ACL or if there is an ACL
3823 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3824 return ret;
3825 return nfs4_get_acl_uncached(inode, buf, buflen);
3826}
3827
16b4289c 3828static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3829{
3830 struct nfs_server *server = NFS_SERVER(inode);
3831 struct page *pages[NFS4ACL_MAXPAGES];
3832 struct nfs_setaclargs arg = {
3833 .fh = NFS_FH(inode),
3834 .acl_pages = pages,
3835 .acl_len = buflen,
3836 };
73c403a9 3837 struct nfs_setaclres res;
4b580ee3
BF		 3838 struct rpc_message msg = {
3839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3840 .rpc_argp = &arg,
73c403a9 3841 .rpc_resp = &res,
4b580ee3 3842 };
21f498c2 3843 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3844 int ret, i;
4b580ee3
BF		 3845
3846 if (!nfs4_server_supports_acls(server))
3847 return -EOPNOTSUPP;
21f498c2
TM		 3848 if (npages > ARRAY_SIZE(pages))
3849 return -ERANGE;
e9e3d724
NH		 3850 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3851 if (i < 0)
3852 return i;
57ec14c5 3853 nfs4_inode_return_delegation(inode);
7c513058 3854 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3855
3856 /*
3857 * Free each page after tx, so the only ref left is
3858 * held by the network stack
3859 */
3860 for (; i > 0; i--)
3861 put_page(pages[i-1]);
3862
08a22b39
AK		 3863 /*
3864 * Acl update can result in inode attribute update.
3865 * so mark the attribute cache invalid.
3866 */
3867 spin_lock(&inode->i_lock);
3868 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3869 spin_unlock(&inode->i_lock);
f41f7418
TM		 3870 nfs_access_zap_cache(inode);
3871 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3872 return ret;
3873}
3874
16b4289c
TM		 3875static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3876{
3877 struct nfs4_exception exception = { };
3878 int err;
3879 do {
3880 err = nfs4_handle_exception(NFS_SERVER(inode),
3881 __nfs4_proc_set_acl(inode, buf, buflen),
3882 &exception);
3883 } while (exception.retry);
3884 return err;
3885}
3886
1da177e4 3887static int
aa5190d0 3888nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3889{
aa5190d0
TM		 3890 struct nfs_client *clp = server->nfs_client;
3891
3892 if (task->tk_status >= 0)
1da177e4
LT		 3893 return 0;
3894 switch(task->tk_status) {
a1d0b5ee 3895 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3896 case -NFS4ERR_ADMIN_REVOKED:
3897 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3898 if (state == NULL)
3899 break;
3900 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3901 case -NFS4ERR_OPENMODE:
3902 if (state == NULL)
3903 break;
0400a6b0
TM		 3904 nfs4_schedule_stateid_recovery(server, state);
3905 goto wait_on_recovery;
0ced63d1
TM		 3906 case -NFS4ERR_EXPIRED:
3907 if (state != NULL)
3908 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3909 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3910 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3911 nfs4_schedule_lease_recovery(clp);
3912 goto wait_on_recovery;
4745e315
AA		 3913#if defined(CONFIG_NFS_V4_1)
3914 case -NFS4ERR_BADSESSION:
3915 case -NFS4ERR_BADSLOT:
3916 case -NFS4ERR_BAD_HIGH_SLOT:
3917 case -NFS4ERR_DEADSESSION:
3918 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3919 case -NFS4ERR_SEQ_FALSE_RETRY:
3920 case -NFS4ERR_SEQ_MISORDERED:
3921 dprintk("%s ERROR %d, Reset session\n", __func__,
3922 task->tk_status);
9f594791 3923 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3924 task->tk_status = 0;
3925 return -EAGAIN;
3926#endif /* CONFIG_NFS_V4_1 */
1da177e4 3927 case -NFS4ERR_DELAY:
aa5190d0 3928 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3929 case -NFS4ERR_GRACE:
2c643488 3930 case -EKEYEXPIRED:
1da177e4
LT		 3931 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3932 task->tk_status = 0;
3933 return -EAGAIN;
a8a4ae3a 3934 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3935 case -NFS4ERR_OLD_STATEID:
3936 task->tk_status = 0;
3937 return -EAGAIN;
3938 }
3939 task->tk_status = nfs4_map_errors(task->tk_status);
3940 return 0;
0400a6b0 3941wait_on_recovery:
a2c0b9e2 3942 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3943 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3944 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3945 task->tk_status = 0;
3946 return -EAGAIN;
1da177e4
LT		 3947}
3948
f092075d
CL		 3949static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3950 nfs4_verifier *bootverf)
cd93710e
CL		 3951{
3952 __be32 verf[2];
3953
2c820d9a
CL		 3954 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3955 /* An impossible timestamp guarantees this value
3956 * will never match a generated boot time. */
3957 verf[0] = 0;
3958 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3959 } else {
f092075d
CL		 3960 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3961 verf[0] = (__be32)nn->boot_time.tv_sec;
3962 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3963 }
cd93710e
CL		 3964 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3965}
3966
e984a55a
CL		 3967static unsigned int
3968nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
3969 char *buf, size_t len)
3970{
3971 unsigned int result;
3972
3973 rcu_read_lock();
3974 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
3975 clp->cl_ipaddr,
3976 rpc_peeraddr2str(clp->cl_rpcclient,
3977 RPC_DISPLAY_ADDR),
3978 rpc_peeraddr2str(clp->cl_rpcclient,
3979 RPC_DISPLAY_PROTO));
3980 rcu_read_unlock();
3981 return result;
3982}
3983
3984static unsigned int
3985nfs4_init_uniform_client_string(const struct nfs_client *clp,
3986 char *buf, size_t len)
3987{
6f2ea7f2
CL		 3988 char *nodename = clp->cl_rpcclient->cl_nodename;
3989
3990 if (nfs4_client_id_uniquifier[0] != '\0')
3991 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 3992 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
3993 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 3994 nodename);
e984a55a
CL		 3995}
3996
6bbb4ae8
CL		 3997/**
3998 * nfs4_proc_setclientid - Negotiate client ID
3999 * @clp: state data structure
4000 * @program: RPC program for NFSv4 callback service
4001 * @port: IP port number for NFS4 callback service
4002 * @cred: RPC credential to use for this call
4003 * @res: where to place the result
4004 *
4005 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4006 */
bb8b27e5
TM		 4007int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4008 unsigned short port, struct rpc_cred *cred,
4009 struct nfs4_setclientid_res *res)
1da177e4
LT		 4010{
4011 nfs4_verifier sc_verifier;
4012 struct nfs4_setclientid setclientid = {
4013 .sc_verifier = &sc_verifier,
4014 .sc_prog = program,
f4eecd5d 4015 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4016 };
4017 struct rpc_message msg = {
4018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4019 .rpc_argp = &setclientid,
bb8b27e5 4020 .rpc_resp = res,
286d7d6a 4021 .rpc_cred = cred,
1da177e4 4022 };
6bbb4ae8 4023 int status;
1da177e4 4024
de734831 4025 /* nfs_client_id4 */
f092075d 4026 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4027 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4028 setclientid.sc_name_len =
4029 nfs4_init_uniform_client_string(clp,
4030 setclientid.sc_name,
4031 sizeof(setclientid.sc_name));
4032 else
4033 setclientid.sc_name_len =
4034 nfs4_init_nonuniform_client_string(clp,
4035 setclientid.sc_name,
4036 sizeof(setclientid.sc_name));
de734831 4037 /* cb_client4 */
e984a55a 4038 rcu_read_lock();
de734831 4039 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4040 sizeof(setclientid.sc_netid),
4041 rpc_peeraddr2str(clp->cl_rpcclient,
4042 RPC_DISPLAY_NETID));
de734831
CL		 4043 rcu_read_unlock();
4044 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4045 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4046 clp->cl_ipaddr, port >> 8, port & 255);
4047
6bbb4ae8
CL		 4048 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4049 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4050 setclientid.sc_name_len, setclientid.sc_name);
4051 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4052 dprintk("NFS reply setclientid: %d\n", status);
4053 return status;
1da177e4
LT		 4054}
4055
6bbb4ae8
CL		 4056/**
4057 * nfs4_proc_setclientid_confirm - Confirm client ID
4058 * @clp: state data structure
4059 * @res: result of a previous SETCLIENTID
4060 * @cred: RPC credential to use for this call
4061 *
4062 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4063 */
fd954ae1 4064int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4065 struct nfs4_setclientid_res *arg,
4066 struct rpc_cred *cred)
1da177e4
LT		 4067{
4068 struct nfs_fsinfo fsinfo;
4069 struct rpc_message msg = {
4070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4071 .rpc_argp = arg,
1da177e4 4072 .rpc_resp = &fsinfo,
286d7d6a 4073 .rpc_cred = cred,
1da177e4
LT		 4074 };
4075 unsigned long now;
4076 int status;
4077
6bbb4ae8
CL		 4078 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4079 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4080 clp->cl_clientid);
1da177e4 4081 now = jiffies;
1bd714f2 4082 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4083 if (status == 0) {
4084 spin_lock(&clp->cl_lock);
4085 clp->cl_lease_time = fsinfo.lease_time * HZ;
4086 clp->cl_last_renewal = now;
4087 spin_unlock(&clp->cl_lock);
4088 }
6bbb4ae8 4089 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4090 return status;
4091}
4092
fe650407
TM		 4093struct nfs4_delegreturndata {
4094 struct nfs4_delegreturnargs args;
fa178f29 4095 struct nfs4_delegreturnres res;
fe650407
TM		 4096 struct nfs_fh fh;
4097 nfs4_stateid stateid;
26e976a8 4098 unsigned long timestamp;
fa178f29 4099 struct nfs_fattr fattr;
fe650407
TM		 4100 int rpc_status;
4101};
4102
fe650407
TM		 4103static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4104{
4105 struct nfs4_delegreturndata *data = calldata;
938e1010 4106
14516c3a
TM		 4107 if (!nfs4_sequence_done(task, &data->res.seq_res))
4108 return;
938e1010 4109
79708861
RL		 4110 switch (task->tk_status) {
4111 case -NFS4ERR_STALE_STATEID:
4112 case -NFS4ERR_EXPIRED:
4113 case 0:
fa178f29 4114 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4115 break;
4116 default:
4117 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4118 -EAGAIN) {
d00c5d43 4119 rpc_restart_call_prepare(task);
79708861
RL		 4120 return;
4121 }
4122 }
4123 data->rpc_status = task->tk_status;
fe650407
TM		 4124}
4125
4126static void nfs4_delegreturn_release(void *calldata)
4127{
fe650407
TM		 4128 kfree(calldata);
4129}
4130
938e1010
AA		 4131#if defined(CONFIG_NFS_V4_1)
4132static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4133{
4134 struct nfs4_delegreturndata *d_data;
4135
4136 d_data = (struct nfs4_delegreturndata *)data;
4137
d9afbd1b
TM		 4138 nfs4_setup_sequence(d_data->res.server,
4139 &d_data->args.seq_args,
4140 &d_data->res.seq_res,
4141 task);
938e1010
AA		 4142}
4143#endif /* CONFIG_NFS_V4_1 */
4144
c8d149f3 4145static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4146#if defined(CONFIG_NFS_V4_1)
4147 .rpc_call_prepare = nfs4_delegreturn_prepare,
4148#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4149 .rpc_call_done = nfs4_delegreturn_done,
4150 .rpc_release = nfs4_delegreturn_release,
4151};
4152
e6f81075 4153static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4154{
4155 struct nfs4_delegreturndata *data;
fa178f29 4156 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4157 struct rpc_task *task;
5138fde0
TM		 4158 struct rpc_message msg = {
4159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4160 .rpc_cred = cred,
4161 };
c970aa85
TM		 4162 struct rpc_task_setup task_setup_data = {
4163 .rpc_client = server->client,
5138fde0 4164 .rpc_message = &msg,
c970aa85
TM		 4165 .callback_ops = &nfs4_delegreturn_ops,
4166 .flags = RPC_TASK_ASYNC,
4167 };
e6f81075 4168 int status = 0;
fe650407 4169
8535b2be 4170 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4171 if (data == NULL)
4172 return -ENOMEM;
9d12b216 4173 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4174 data->args.fhandle = &data->fh;
4175 data->args.stateid = &data->stateid;
9e907fec 4176 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4177 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4178 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4179 data->res.fattr = &data->fattr;
4180 data->res.server = server;
5138fde0 4181 nfs_fattr_init(data->res.fattr);
26e976a8 4182 data->timestamp = jiffies;
fe650407
TM		 4183 data->rpc_status = 0;
4184
c970aa85 4185 task_setup_data.callback_data = data;
1174dd1f
TM		 4186 msg.rpc_argp = &data->args;
4187 msg.rpc_resp = &data->res;
c970aa85 4188 task = rpc_run_task(&task_setup_data);
7a1218a2 4189 if (IS_ERR(task))
fe650407 4190 return PTR_ERR(task);
e6f81075
TM		 4191 if (!issync)
4192 goto out;
fe650407 4193 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4194 if (status != 0)
4195 goto out;
4196 status = data->rpc_status;
e144cbcc
TM		 4197 if (status == 0)
4198 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4199 else
4200 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4201out:
e6b3c4db 4202 rpc_put_task(task);
fe650407 4203 return status;
1da177e4
LT		 4204}
4205
e6f81075 4206int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4207{
4208 struct nfs_server *server = NFS_SERVER(inode);
4209 struct nfs4_exception exception = { };
4210 int err;
4211 do {
e6f81075 4212 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4213 switch (err) {
4214 case -NFS4ERR_STALE_STATEID:
4215 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4216 case 0:
4217 return 0;
4218 }
4219 err = nfs4_handle_exception(server, err, &exception);
4220 } while (exception.retry);
4221 return err;
4222}
4223
4224#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4225#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4226
4227/*
4228 * sleep, with exponential backoff, and retry the LOCK operation.
4229 */
4230static unsigned long
4231nfs4_set_lock_task_retry(unsigned long timeout)
4232{
d310310c 4233 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4234 timeout <<= 1;
4235 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4236 return NFS4_LOCK_MAXTIMEOUT;
4237 return timeout;
4238}
4239
1da177e4
LT		 4240static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4241{
4242 struct inode *inode = state->inode;
4243 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4244 struct nfs_client *clp = server->nfs_client;
911d1aaf 4245 struct nfs_lockt_args arg = {
1da177e4 4246 .fh = NFS_FH(inode),
911d1aaf 4247 .fl = request,
1da177e4 4248 };
911d1aaf
TM		 4249 struct nfs_lockt_res res = {
4250 .denied = request,
1da177e4
LT		 4251 };
4252 struct rpc_message msg = {
4253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4254 .rpc_argp = &arg,
4255 .rpc_resp = &res,
4256 .rpc_cred = state->owner->so_cred,
4257 };
1da177e4
LT		 4258 struct nfs4_lock_state *lsp;
4259 int status;
4260
911d1aaf 4261 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4262 status = nfs4_set_lock_state(state, request);
4263 if (status != 0)
4264 goto out;
4265 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4266 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4267 arg.lock_owner.s_dev = server->s_dev;
7c513058 4268 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4269 switch (status) {
4270 case 0:
4271 request->fl_type = F_UNLCK;
4272 break;
4273 case -NFS4ERR_DENIED:
4274 status = 0;
1da177e4 4275 }
70cc6487 4276 request->fl_ops->fl_release_private(request);
8d0a8a9d 4277out:
1da177e4
LT		 4278 return status;
4279}
4280
4281static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4282{
4283 struct nfs4_exception exception = { };
4284 int err;
4285
4286 do {
4287 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4288 _nfs4_proc_getlk(state, cmd, request),
4289 &exception);
4290 } while (exception.retry);
4291 return err;
4292}
4293
4294static int do_vfs_lock(struct file *file, struct file_lock *fl)
4295{
4296 int res = 0;
4297 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4298 case FL_POSIX:
4299 res = posix_lock_file_wait(file, fl);
4300 break;
4301 case FL_FLOCK:
4302 res = flock_lock_file_wait(file, fl);
4303 break;
4304 default:
4305 BUG();
4306 }
1da177e4
LT		 4307 return res;
4308}
4309
faf5f49c 4310struct nfs4_unlockdata {
911d1aaf
TM		 4311 struct nfs_locku_args arg;
4312 struct nfs_locku_res res;
faf5f49c
TM		 4313 struct nfs4_lock_state *lsp;
4314 struct nfs_open_context *ctx;
911d1aaf
TM		 4315 struct file_lock fl;
4316 const struct nfs_server *server;
26e976a8 4317 unsigned long timestamp;
faf5f49c
TM		 4318};
4319
911d1aaf
TM		 4320static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4321 struct nfs_open_context *ctx,
4322 struct nfs4_lock_state *lsp,
4323 struct nfs_seqid *seqid)
4324{
4325 struct nfs4_unlockdata *p;
4326 struct inode *inode = lsp->ls_state->inode;
4327
8535b2be 4328 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4329 if (p == NULL)
4330 return NULL;
4331 p->arg.fh = NFS_FH(inode);
4332 p->arg.fl = &p->fl;
4333 p->arg.seqid = seqid;
c1d51931 4334 p->res.seqid = seqid;
911d1aaf
TM		 4335 p->arg.stateid = &lsp->ls_stateid;
4336 p->lsp = lsp;
4337 atomic_inc(&lsp->ls_count);
4338 /* Ensure we don't close file until we're done freeing locks! */
4339 p->ctx = get_nfs_open_context(ctx);
4340 memcpy(&p->fl, fl, sizeof(p->fl));
4341 p->server = NFS_SERVER(inode);
4342 return p;
4343}
4344
06f814a3 4345static void nfs4_locku_release_calldata(void *data)
faf5f49c 4346{
963d8fe5 4347 struct nfs4_unlockdata *calldata = data;
911d1aaf 4348 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4349 nfs4_put_lock_state(calldata->lsp);
4350 put_nfs_open_context(calldata->ctx);
4351 kfree(calldata);
faf5f49c
TM		 4352}
4353
963d8fe5 4354static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4355{
963d8fe5 4356 struct nfs4_unlockdata *calldata = data;
faf5f49c 4357
14516c3a
TM		 4358 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4359 return;
faf5f49c
TM		 4360 switch (task->tk_status) {
4361 case 0:
f597c537
TM		 4362 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4363 &calldata->res.stateid);
26e976a8 4364 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4365 break;
9e33bed5
TM		 4366 case -NFS4ERR_BAD_STATEID:
4367 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4368 case -NFS4ERR_STALE_STATEID:
4369 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4370 break;
4371 default:
9e33bed5 4372 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4373 rpc_restart_call_prepare(task);
faf5f49c 4374 }
2b1bc308 4375 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4376}
4377
4ce70ada 4378static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4379{
4ce70ada 4380 struct nfs4_unlockdata *calldata = data;
faf5f49c 4381
911d1aaf 4382 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4383 return;
795a88c9 4384 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4385 /* Note: exit _without_ running nfs4_locku_done */
4386 task->tk_action = NULL;
faf5f49c
TM		 4387 return;
4388 }
26e976a8 4389 calldata->timestamp = jiffies;
035168ab 4390 if (nfs4_setup_sequence(calldata->server,
a893693c 4391 &calldata->arg.seq_args,
2240a9e2
TM		 4392 &calldata->res.seq_res,
4393 task) != 0)
4394 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4395}
4396
963d8fe5 4397static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4398 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4399 .rpc_call_done = nfs4_locku_done,
06f814a3 4400 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4401};
4402
a5d16a4d
TM		 4403static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4404 struct nfs_open_context *ctx,
4405 struct nfs4_lock_state *lsp,
4406 struct nfs_seqid *seqid)
4407{
4408 struct nfs4_unlockdata *data;
5138fde0
TM		 4409 struct rpc_message msg = {
4410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4411 .rpc_cred = ctx->cred,
4412 };
c970aa85
TM		 4413 struct rpc_task_setup task_setup_data = {
4414 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4415 .rpc_message = &msg,
c970aa85 4416 .callback_ops = &nfs4_locku_ops,
101070ca 4417 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4418 .flags = RPC_TASK_ASYNC,
4419 };
a5d16a4d 4420
137d6aca
FF		 4421 /* Ensure this is an unlock - when canceling a lock, the
4422 * canceled lock is passed in, and it won't be an unlock.
4423 */
4424 fl->fl_type = F_UNLCK;
4425
a5d16a4d
TM		 4426 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4427 if (data == NULL) {
4428 nfs_free_seqid(seqid);
4429 return ERR_PTR(-ENOMEM);
4430 }
4431
9d12b216 4432 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4433 msg.rpc_argp = &data->arg;
4434 msg.rpc_resp = &data->res;
c970aa85
TM		 4435 task_setup_data.callback_data = data;
4436 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4437}
4438
faf5f49c
TM		 4439static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4440{
19e03c57 4441 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4442 struct nfs_seqid *seqid;
1da177e4 4443 struct nfs4_lock_state *lsp;
06f814a3
TM		 4444 struct rpc_task *task;
4445 int status = 0;
536ff0f8 4446 unsigned char fl_flags = request->fl_flags;
faf5f49c 4447
8d0a8a9d 4448 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4449 /* Unlock _before_ we do the RPC call */
4450 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4451 down_read(&nfsi->rwsem);
4452 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4453 up_read(&nfsi->rwsem);
9b073574 4454 goto out;
19e03c57
TM		 4455 }
4456 up_read(&nfsi->rwsem);
8d0a8a9d 4457 if (status != 0)
9b073574
TM		 4458 goto out;
4459 /* Is this a delegated lock? */
4460 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4461 goto out;
8d0a8a9d 4462 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4463 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4464 status = -ENOMEM;
911d1aaf 4465 if (seqid == NULL)
9b073574 4466 goto out;
cd3758e3 4467 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4468 status = PTR_ERR(task);
4469 if (IS_ERR(task))
9b073574 4470 goto out;
a5d16a4d 4471 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4472 rpc_put_task(task);
9b073574 4473out:
536ff0f8 4474 request->fl_flags = fl_flags;
1da177e4
LT		 4475 return status;
4476}
4477
a5d16a4d
TM		 4478struct nfs4_lockdata {
4479 struct nfs_lock_args arg;
4480 struct nfs_lock_res res;
4481 struct nfs4_lock_state *lsp;
4482 struct nfs_open_context *ctx;
4483 struct file_lock fl;
26e976a8 4484 unsigned long timestamp;
a5d16a4d
TM		 4485 int rpc_status;
4486 int cancelled;
66179efe 4487 struct nfs_server *server;
a5d16a4d
TM		 4488};
4489
4490static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4491 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4492 gfp_t gfp_mask)
1da177e4 4493{
a5d16a4d
TM		 4494 struct nfs4_lockdata *p;
4495 struct inode *inode = lsp->ls_state->inode;
1da177e4 4496 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4497
8535b2be 4498 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4499 if (p == NULL)
4500 return NULL;
4501
4502 p->arg.fh = NFS_FH(inode);
4503 p->arg.fl = &p->fl;
8535b2be 4504 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4505 if (p->arg.open_seqid == NULL)
4506 goto out_free;
8535b2be 4507 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4508 if (p->arg.lock_seqid == NULL)
2f74c0a0 4509 goto out_free_seqid;
a5d16a4d 4510 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4511 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4512 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4513 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4514 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4515 p->lsp = lsp;
66179efe 4516 p->server = server;
a5d16a4d
TM		 4517 atomic_inc(&lsp->ls_count);
4518 p->ctx = get_nfs_open_context(ctx);
4519 memcpy(&p->fl, fl, sizeof(p->fl));
4520 return p;
2f74c0a0
TM		 4521out_free_seqid:
4522 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4523out_free:
4524 kfree(p);
4525 return NULL;
4526}
4527
4528static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4529{
4530 struct nfs4_lockdata *data = calldata;
4531 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4532
3110ff80 4533 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4534 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4535 return;
a5d16a4d
TM		 4536 /* Do we need to do an open_to_lock_owner? */
4537 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4538 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4539 goto out_release_lock_seqid;
8fe72bac 4540 }
a5d16a4d
TM		 4541 data->arg.open_stateid = &state->stateid;
4542 data->arg.new_lock_owner = 1;
c1d51931 4543 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4544 } else
4545 data->arg.new_lock_owner = 0;
26e976a8 4546 data->timestamp = jiffies;
035168ab
TM		 4547 if (nfs4_setup_sequence(data->server,
4548 &data->arg.seq_args,
2240a9e2 4549 &data->res.seq_res,
d9afbd1b 4550 task) == 0)
66179efe 4551 return;
2240a9e2
TM		 4552 nfs_release_seqid(data->arg.open_seqid);
4553out_release_lock_seqid:
4554 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4555 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4556}
4557
a5d16a4d
TM		 4558static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4559{
4560 struct nfs4_lockdata *data = calldata;
4561
3110ff80 4562 dprintk("%s: begin!\n", __func__);
a5d16a4d 4563
14516c3a
TM		 4564 if (!nfs4_sequence_done(task, &data->res.seq_res))
4565 return;
66179efe 4566
a5d16a4d 4567 data->rpc_status = task->tk_status;
a5d16a4d 4568 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4569 if (data->rpc_status == 0)
4570 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4571 else
4572 goto out;
4573 }
4574 if (data->rpc_status == 0) {
f597c537 4575 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4576 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4577 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4578 }
a5d16a4d 4579out:
3110ff80 4580 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4581}
4582
4583static void nfs4_lock_release(void *calldata)
4584{
4585 struct nfs4_lockdata *data = calldata;
4586
3110ff80 4587 dprintk("%s: begin!\n", __func__);
2f74c0a0 4588 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4589 if (data->cancelled != 0) {
4590 struct rpc_task *task;
4591 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4592 data->arg.lock_seqid);
4593 if (!IS_ERR(task))
bf294b41 4594 rpc_put_task_async(task);
3110ff80 4595 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4596 } else
4597 nfs_free_seqid(data->arg.lock_seqid);
4598 nfs4_put_lock_state(data->lsp);
4599 put_nfs_open_context(data->ctx);
4600 kfree(data);
3110ff80 4601 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4602}
4603
4604static const struct rpc_call_ops nfs4_lock_ops = {
4605 .rpc_call_prepare = nfs4_lock_prepare,
4606 .rpc_call_done = nfs4_lock_done,
4607 .rpc_release = nfs4_lock_release,
4608};
4609
2bee72a6
TM		 4610static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4611{
2bee72a6
TM		 4612 switch (error) {
4613 case -NFS4ERR_ADMIN_REVOKED:
4614 case -NFS4ERR_BAD_STATEID:
ecac799a 4615 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4616 if (new_lock_owner != 0 ||
795a88c9 4617 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4618 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4619 break;
4620 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4621 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4622 case -NFS4ERR_EXPIRED:
4623 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4624 };
4625}
4626
afe6c27c 4627static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4628{
4629 struct nfs4_lockdata *data;
4630 struct rpc_task *task;
5138fde0
TM		 4631 struct rpc_message msg = {
4632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4633 .rpc_cred = state->owner->so_cred,
4634 };
c970aa85
TM		 4635 struct rpc_task_setup task_setup_data = {
4636 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4637 .rpc_message = &msg,
c970aa85 4638 .callback_ops = &nfs4_lock_ops,
101070ca 4639 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4640 .flags = RPC_TASK_ASYNC,
4641 };
a5d16a4d
TM		 4642 int ret;
4643
3110ff80 4644 dprintk("%s: begin!\n", __func__);
cd3758e3 4645 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4646 fl->fl_u.nfs4_fl.owner,
4647 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4648 if (data == NULL)
4649 return -ENOMEM;
4650 if (IS_SETLKW(cmd))
4651 data->arg.block = 1;
9d12b216 4652 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4653 msg.rpc_argp = &data->arg;
4654 msg.rpc_resp = &data->res;
c970aa85 4655 task_setup_data.callback_data = data;
8fe72bac
TM		 4656 if (recovery_type > NFS_LOCK_NEW) {
4657 if (recovery_type == NFS_LOCK_RECLAIM)
4658 data->arg.reclaim = NFS_LOCK_RECLAIM;
4659 nfs4_set_sequence_privileged(&data->arg.seq_args);
4660 }
c970aa85 4661 task = rpc_run_task(&task_setup_data);
7a1218a2 4662 if (IS_ERR(task))
a5d16a4d 4663 return PTR_ERR(task);
a5d16a4d
TM		 4664 ret = nfs4_wait_for_completion_rpc_task(task);
4665 if (ret == 0) {
4666 ret = data->rpc_status;
2bee72a6
TM		 4667 if (ret)
4668 nfs4_handle_setlk_error(data->server, data->lsp,
4669 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4670 } else
4671 data->cancelled = 1;
e6b3c4db 4672 rpc_put_task(task);
3110ff80 4673 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4674 return ret;
1da177e4
LT		 4675}
4676
4677static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4678{
202b50dc 4679 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4680 struct nfs4_exception exception = {
4681 .inode = state->inode,
4682 };
202b50dc
TM		 4683 int err;
4684
4685 do {
42a2d13e
TM		 4686 /* Cache the lock if possible... */
4687 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4688 return 0;
afe6c27c 4689 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4690 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4691 break;
4692 nfs4_handle_exception(server, err, &exception);
4693 } while (exception.retry);
4694 return err;
1da177e4
LT		 4695}
4696
4697static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4698{
202b50dc 4699 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4700 struct nfs4_exception exception = {
4701 .inode = state->inode,
4702 };
202b50dc
TM		 4703 int err;
4704
6bfc93ef
TM		 4705 err = nfs4_set_lock_state(state, request);
4706 if (err != 0)
4707 return err;
202b50dc 4708 do {
42a2d13e
TM		 4709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4710 return 0;
afe6c27c 4711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4712 switch (err) {
4713 default:
4714 goto out;
4715 case -NFS4ERR_GRACE:
4716 case -NFS4ERR_DELAY:
4717 nfs4_handle_exception(server, err, &exception);
4718 err = 0;
4719 }
202b50dc 4720 } while (exception.retry);
a9ed2e25 4721out:
202b50dc 4722 return err;
1da177e4
LT		 4723}
4724
f062eb6c 4725#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4726/**
4727 * nfs41_check_expired_locks - possibly free a lock stateid
4728 *
4729 * @state: NFSv4 state for an inode
4730 *
4731 * Returns NFS_OK if recovery for this stateid is now finished.
4732 * Otherwise a negative NFS4ERR value is returned.
4733 */
b01dd1d8 4734static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4735{
eb64cf96 4736 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4737 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4738 struct nfs_server *server = NFS_SERVER(state->inode);
4739
b01dd1d8 4740 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4741 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4742 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4743 if (status != NFS_OK) {
3e60ffdd
CL		 4744 /* Free the stateid unless the server
4745 * informs us the stateid is unrecognized. */
89af2739
CL		 4746 if (status != -NFS4ERR_BAD_STATEID)
4747 nfs41_free_stateid(server,
4748 &lsp->ls_stateid);
795a88c9 4749 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4750 ret = status;
4751 }
4752 }
4753 };
4754
4755 return ret;
4756}
4757
4758static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4759{
4760 int status = NFS_OK;
4761
4762 if (test_bit(LK_STATE_IN_USE, &state->flags))
4763 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4764 if (status != NFS_OK)
4765 status = nfs4_lock_expired(state, request);
4766 return status;
f062eb6c
BS		 4767}
4768#endif
4769
1da177e4
LT		 4770static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4771{
19e03c57 4772 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4773 unsigned char fl_flags = request->fl_flags;
8e469ebd 4774 int status = -ENOLCK;
1da177e4 4775
8e469ebd
TM		 4776 if ((fl_flags & FL_POSIX) &&
4777 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4778 goto out;
6bfc93ef 4779 /* Is this a delegated open? */
6bfc93ef
TM		 4780 status = nfs4_set_lock_state(state, request);
4781 if (status != 0)
4782 goto out;
01c3b861
TM		 4783 request->fl_flags |= FL_ACCESS;
4784 status = do_vfs_lock(request->fl_file, request);
4785 if (status < 0)
4786 goto out;
19e03c57 4787 down_read(&nfsi->rwsem);
01c3b861 4788 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4789 /* Yes: cache locks! */
01c3b861 4790 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4791 request->fl_flags = fl_flags & ~FL_SLEEP;
4792 status = do_vfs_lock(request->fl_file, request);
4793 goto out_unlock;
01c3b861 4794 }
afe6c27c 4795 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4796 if (status != 0)
01c3b861 4797 goto out_unlock;
6bfc93ef 4798 /* Note: we always want to sleep here! */
01c3b861 4799 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4800 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4801 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4802 "manager!\n", __func__);
01c3b861 4803out_unlock:
19e03c57 4804 up_read(&nfsi->rwsem);
01c3b861
TM		 4805out:
4806 request->fl_flags = fl_flags;
1da177e4
LT		 4807 return status;
4808}
4809
4810static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4811{
a1d0b5ee
TM		 4812 struct nfs4_exception exception = {
4813 .state = state,
05ffe24f 4814 .inode = state->inode,
a1d0b5ee 4815 };
1da177e4
LT		 4816 int err;
4817
4818 do {
965b5d67
TM		 4819 err = _nfs4_proc_setlk(state, cmd, request);
4820 if (err == -NFS4ERR_DENIED)
4821 err = -EAGAIN;
1da177e4 4822 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4823 err, &exception);
1da177e4
LT		 4824 } while (exception.retry);
4825 return err;
4826}
4827
4828static int
4829nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4830{
4831 struct nfs_open_context *ctx;
4832 struct nfs4_state *state;
4833 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4834 int status;
4835
4836 /* verify open state */
cd3758e3 4837 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4838 state = ctx->state;
4839
4840 if (request->fl_start < 0 || request->fl_end < 0)
4841 return -EINVAL;
4842
d953126a
TM		 4843 if (IS_GETLK(cmd)) {
4844 if (state != NULL)
4845 return nfs4_proc_getlk(state, F_GETLK, request);
4846 return 0;
4847 }
1da177e4
LT		 4848
4849 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4850 return -EINVAL;
4851
d953126a
TM		 4852 if (request->fl_type == F_UNLCK) {
4853 if (state != NULL)
4854 return nfs4_proc_unlck(state, cmd, request);
4855 return 0;
4856 }
1da177e4 4857
d953126a
TM		 4858 if (state == NULL)
4859 return -ENOLCK;
55725513
TM		 4860 /*
4861 * Don't rely on the VFS having checked the file open mode,
4862 * since it won't do this for flock() locks.
4863 */
f44106e2 4864 switch (request->fl_type) {
55725513
TM		 4865 case F_RDLCK:
4866 if (!(filp->f_mode & FMODE_READ))
4867 return -EBADF;
4868 break;
4869 case F_WRLCK:
4870 if (!(filp->f_mode & FMODE_WRITE))
4871 return -EBADF;
4872 }
4873
1da177e4
LT		 4874 do {
4875 status = nfs4_proc_setlk(state, cmd, request);
4876 if ((status != -EAGAIN) || IS_SETLK(cmd))
4877 break;
4878 timeout = nfs4_set_lock_task_retry(timeout);
4879 status = -ERESTARTSYS;
4880 if (signalled())
4881 break;
4882 } while(status < 0);
1da177e4
LT		 4883 return status;
4884}
4885
888e694c
TM		 4886int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4887{
4888 struct nfs_server *server = NFS_SERVER(state->inode);
4889 struct nfs4_exception exception = { };
4890 int err;
4891
4892 err = nfs4_set_lock_state(state, fl);
4893 if (err != 0)
4894 goto out;
4895 do {
afe6c27c 4896 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4897 switch (err) {
4898 default:
a030889a
WAA		 4899 printk(KERN_ERR "NFS: %s: unhandled error "
4900 "%d.\n", __func__, err);
d5122201 4901 case 0:
965b5d67 4902 case -ESTALE:
d5122201
TM		 4903 goto out;
4904 case -NFS4ERR_EXPIRED:
0ced63d1 4905 nfs4_schedule_stateid_recovery(server, state);
d5122201 4906 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4907 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4908 nfs4_schedule_lease_recovery(server->nfs_client);
4909 goto out;
74e7bb73
RL		 4910 case -NFS4ERR_BADSESSION:
4911 case -NFS4ERR_BADSLOT:
4912 case -NFS4ERR_BAD_HIGH_SLOT:
4913 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4914 case -NFS4ERR_DEADSESSION:
9f594791 4915 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4916 goto out;
965b5d67
TM		 4917 case -ERESTARTSYS:
4918 /*
4919 * The show must go on: exit, but mark the
4920 * stateid as needing recovery.
4921 */
a1d0b5ee 4922 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4923 case -NFS4ERR_ADMIN_REVOKED:
4924 case -NFS4ERR_BAD_STATEID:
4925 case -NFS4ERR_OPENMODE:
0400a6b0 4926 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4927 err = 0;
4928 goto out;
168667c4
TM		 4929 case -EKEYEXPIRED:
4930 /*
4931 * User RPCSEC_GSS context has expired.
4932 * We cannot recover this stateid now, so
4933 * skip it and allow recovery thread to
4934 * proceed.
4935 */
4936 err = 0;
4937 goto out;
965b5d67
TM		 4938 case -ENOMEM:
4939 case -NFS4ERR_DENIED:
4940 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4941 err = 0;
4942 goto out;
d5122201
TM		 4943 case -NFS4ERR_DELAY:
4944 break;
4945 }
888e694c
TM		 4946 err = nfs4_handle_exception(server, err, &exception);
4947 } while (exception.retry);
4948out:
4949 return err;
4950}
6b3b5496 4951
cf470c3e
TM		 4952struct nfs_release_lockowner_data {
4953 struct nfs4_lock_state *lsp;
5ae67c4f 4954 struct nfs_server *server;
cf470c3e
TM		 4955 struct nfs_release_lockowner_args args;
4956};
4957
d3c7b7cc
TM		 4958static void nfs4_release_lockowner_release(void *calldata)
4959{
cf470c3e 4960 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4961 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4962 kfree(calldata);
4963}
4964
17280175 4965static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4966 .rpc_release = nfs4_release_lockowner_release,
4967};
4968
cf470c3e 4969int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4970{
4971 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4972 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4975 };
4976
4977 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4978 return -EINVAL;
4979 data = kmalloc(sizeof(*data), GFP_NOFS);
4980 if (!data)
4981 return -ENOMEM;
4982 data->lsp = lsp;
5ae67c4f 4983 data->server = server;
cf470c3e
TM		 4984 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4985 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4986 data->args.lock_owner.s_dev = server->s_dev;
4987 msg.rpc_argp = &data->args;
4988 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4989 return 0;
d3c7b7cc
TM		 4990}
4991
aa1870af
BF		 4992#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4993
64c2ce8b
AK		 4994static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4995 const void *buf, size_t buflen,
4996 int flags, int type)
6b3b5496 4997{
64c2ce8b
AK		 4998 if (strcmp(key, "") != 0)
4999 return -EINVAL;
4b580ee3 5000
64c2ce8b 5001 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5002}
5003
64c2ce8b
AK		 5004static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5005 void *buf, size_t buflen, int type)
6b3b5496 5006{
64c2ce8b
AK		 5007 if (strcmp(key, "") != 0)
5008 return -EINVAL;
aa1870af 5009
64c2ce8b 5010 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5011}
5012
64c2ce8b
AK		 5013static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5014 size_t list_len, const char *name,
5015 size_t name_len, int type)
6b3b5496 5016{
64c2ce8b 5017 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5018
096455a2
BF		 5019 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5020 return 0;
64c2ce8b
AK		 5021
5022 if (list && len <= list_len)
5023 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5024 return len;
6b3b5496
BF		 5025}
5026
533eb461
AA		 5027/*
5028 * nfs_fhget will use either the mounted_on_fileid or the fileid
5029 */
69aaaae1
TM		 5030static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5031{
533eb461
AA		 5032 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5033 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5034 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5035 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5036 return;
5037
5038 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5039 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5040 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5041 fattr->nlink = 2;
5042}
5043
f05d147f
BS		 5044static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5045 const struct qstr *name,
5046 struct nfs4_fs_locations *fs_locations,
5047 struct page *page)
683b57b4
TM		 5048{
5049 struct nfs_server *server = NFS_SERVER(dir);
5050 u32 bitmask[2] = {
361e624f 5051 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5052 };
5053 struct nfs4_fs_locations_arg args = {
5054 .dir_fh = NFS_FH(dir),
c228fd3a 5055 .name = name,
683b57b4
TM		 5056 .page = page,
5057 .bitmask = bitmask,
5058 };
22958463
BH		 5059 struct nfs4_fs_locations_res res = {
5060 .fs_locations = fs_locations,
5061 };
683b57b4
TM		 5062 struct rpc_message msg = {
5063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5064 .rpc_argp = &args,
22958463 5065 .rpc_resp = &res,
683b57b4
TM		 5066 };
5067 int status;
5068
3110ff80 5069 dprintk("%s: start\n", __func__);
533eb461
AA		 5070
5071 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5072 * is not supported */
5073 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5074 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5075 else
5076 bitmask[0] |= FATTR4_WORD0_FILEID;
5077
c228fd3a 5078 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5079 fs_locations->server = server;
830b8e33 5080 fs_locations->nlocations = 0;
f05d147f 5081 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5082 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5083 return status;
5084}
5085
f05d147f
BS		 5086int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5087 const struct qstr *name,
5088 struct nfs4_fs_locations *fs_locations,
5089 struct page *page)
db0a9593
BS		 5090{
5091 struct nfs4_exception exception = { };
5092 int err;
5093 do {
5094 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5095 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5096 &exception);
5097 } while (exception.retry);
5098 return err;
5099}
5100
5a5ea0d4
BS		 5101static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5102{
5103 int status;
5104 struct nfs4_secinfo_arg args = {
5105 .dir_fh = NFS_FH(dir),
5106 .name = name,
5107 };
5108 struct nfs4_secinfo_res res = {
5109 .flavors = flavors,
5110 };
5111 struct rpc_message msg = {
5112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5113 .rpc_argp = &args,
5114 .rpc_resp = &res,
5115 };
5116
5117 dprintk("NFS call secinfo %s\n", name->name);
5118 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5119 dprintk("NFS reply secinfo: %d\n", status);
5120 return status;
5121}
5122
72de53ec
BS		 5123int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5124 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5125{
5126 struct nfs4_exception exception = { };
5127 int err;
5128 do {
5129 err = nfs4_handle_exception(NFS_SERVER(dir),
5130 _nfs4_proc_secinfo(dir, name, flavors),
5131 &exception);
5132 } while (exception.retry);
5133 return err;
5134}
5135
557134a3 5136#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5137/*
5138 * Check the exchange flags returned by the server for invalid flags, having
5139 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5140 * DS flags set.
5141 */
5142static int nfs4_check_cl_exchange_flags(u32 flags)
5143{
5144 if (flags & ~EXCHGID4_FLAG_MASK_R)
5145 goto out_inval;
5146 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5147 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5148 goto out_inval;
5149 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5150 goto out_inval;
5151 return NFS_OK;
5152out_inval:
5153 return -NFS4ERR_INVAL;
5154}
5155
78fe0f41 5156static bool
79d4e1f0
CL		 5157nfs41_same_server_scope(struct nfs41_server_scope *a,
5158 struct nfs41_server_scope *b)
78fe0f41
WAA		 5159{
5160 if (a->server_scope_sz == b->server_scope_sz &&
5161 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5162 return true;
5163
5164 return false;
5165}
5166
7c44f1ae
WAA		 5167/*
5168 * nfs4_proc_bind_conn_to_session()
5169 *
5170 * The 4.1 client currently uses the same TCP connection for the
5171 * fore and backchannel.
5172 */
2cf047c9 5173int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5174{
5175 int status;
5176 struct nfs41_bind_conn_to_session_res res;
5177 struct rpc_message msg = {
5178 .rpc_proc =
5179 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5180 .rpc_argp = clp,
5181 .rpc_resp = &res,
2cf047c9 5182 .rpc_cred = cred,
7c44f1ae
WAA		 5183 };
5184
5185 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5186
5187 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5188 if (unlikely(res.session == NULL)) {
5189 status = -ENOMEM;
5190 goto out;
5191 }
5192
5193 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5194 if (status == 0) {
5195 if (memcmp(res.session->sess_id.data,
5196 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5197 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5198 status = -EIO;
5199 goto out_session;
5200 }
5201 if (res.dir != NFS4_CDFS4_BOTH) {
5202 dprintk("NFS: %s: Unexpected direction from server\n",
5203 __func__);
5204 status = -EIO;
5205 goto out_session;
5206 }
5207 if (res.use_conn_in_rdma_mode) {
5208 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5209 __func__);
5210 status = -EIO;
5211 goto out_session;
5212 }
5213 }
5214out_session:
5215 kfree(res.session);
5216out:
5217 dprintk("<-- %s status= %d\n", __func__, status);
5218 return status;
5219}
5220
99fe60d0
BH		 5221/*
5222 * nfs4_proc_exchange_id()
5223 *
6bbb4ae8
CL		 5224 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5225 *
99fe60d0
BH		 5226 * Since the clientid has expired, all compounds using sessions
5227 * associated with the stale clientid will be returning
5228 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5229 * be in some phase of session reset.
5230 */
4d643d1d 5231int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5232{
5233 nfs4_verifier verifier;
5234 struct nfs41_exchange_id_args args = {
cd93710e 5235 .verifier = &verifier,
99fe60d0 5236 .client = clp,
357f54d6 5237 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5238 };
5239 struct nfs41_exchange_id_res res = {
32b01310 5240 0
99fe60d0
BH		 5241 };
5242 int status;
5243 struct rpc_message msg = {
5244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5245 .rpc_argp = &args,
5246 .rpc_resp = &res,
5247 .rpc_cred = cred,
5248 };
99fe60d0 5249
f092075d 5250 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5251 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5252 sizeof(args.id));
6bbb4ae8
CL		 5253 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5254 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5255 args.id_len, args.id);
99fe60d0 5256
acdeb69d 5257 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5258 GFP_NOFS);
acdeb69d 5259 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5260 status = -ENOMEM;
5261 goto out;
5262 }
78fe0f41 5263
79d4e1f0 5264 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5265 GFP_NOFS);
177313f1 5266 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5267 status = -ENOMEM;
acdeb69d 5268 goto out_server_owner;
abe9a6d5 5269 }
78fe0f41 5270
bbafffd2 5271 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5272 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5273 status = -ENOMEM;
5274 goto out_server_scope;
5275 }
5276
1bd714f2 5277 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5278 if (status == 0)
32b01310 5279 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5280
acdeb69d 5281 if (status == 0) {
32b01310
TM		 5282 clp->cl_clientid = res.clientid;
5283 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5284 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5285 clp->cl_seqid = res.seqid;
5286
acdeb69d
CL		 5287 kfree(clp->cl_serverowner);
5288 clp->cl_serverowner = res.server_owner;
5289 res.server_owner = NULL;
78fe0f41 5290
7d2ed9ac 5291 /* use the most recent implementation id */
59155546
CL		 5292 kfree(clp->cl_implid);
5293 clp->cl_implid = res.impl_id;
7d2ed9ac 5294
177313f1 5295 if (clp->cl_serverscope != NULL &&
79d4e1f0 5296 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5297 res.server_scope)) {
5298 dprintk("%s: server_scope mismatch detected\n",
5299 __func__);
5300 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5301 kfree(clp->cl_serverscope);
5302 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5303 }
5304
177313f1 5305 if (clp->cl_serverscope == NULL) {
79d4e1f0 5306 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5307 goto out;
5308 }
32b01310
TM		 5309 } else
5310 kfree(res.impl_id);
7d2ed9ac 5311
acdeb69d
CL		 5312out_server_owner:
5313 kfree(res.server_owner);
7d2ed9ac 5314out_server_scope:
abe9a6d5
WAA		 5315 kfree(res.server_scope);
5316out:
177313f1 5317 if (clp->cl_implid != NULL)
6bbb4ae8 5318 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5319 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5320 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5321 clp->cl_implid->date.seconds,
5322 clp->cl_implid->date.nseconds);
6bbb4ae8 5323 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5324 return status;
5325}
5326
66245539
TM		 5327static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5328 struct rpc_cred *cred)
5329{
5330 struct rpc_message msg = {
5331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5332 .rpc_argp = clp,
5333 .rpc_cred = cred,
5334 };
5335 int status;
5336
5337 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5338 if (status)
02c67525 5339 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5340 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5341 return status;
5342}
5343
5344static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5345 struct rpc_cred *cred)
5346{
5347 unsigned int loop;
5348 int ret;
5349
5350 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5351 ret = _nfs4_proc_destroy_clientid(clp, cred);
5352 switch (ret) {
5353 case -NFS4ERR_DELAY:
5354 case -NFS4ERR_CLIENTID_BUSY:
5355 ssleep(1);
5356 break;
5357 default:
5358 return ret;
5359 }
5360 }
5361 return 0;
5362}
5363
5364int nfs4_destroy_clientid(struct nfs_client *clp)
5365{
5366 struct rpc_cred *cred;
5367 int ret = 0;
5368
5369 if (clp->cl_mvops->minor_version < 1)
5370 goto out;
5371 if (clp->cl_exchange_flags == 0)
5372 goto out;
05f4c350
CL		 5373 if (clp->cl_preserve_clid)
5374 goto out;
66245539
TM		 5375 cred = nfs4_get_exchange_id_cred(clp);
5376 ret = nfs4_proc_destroy_clientid(clp, cred);
5377 if (cred)
5378 put_rpccred(cred);
5379 switch (ret) {
5380 case 0:
5381 case -NFS4ERR_STALE_CLIENTID:
5382 clp->cl_exchange_flags = 0;
5383 }
5384out:
5385 return ret;
5386}
5387
2050f0cc
AA		 5388struct nfs4_get_lease_time_data {
5389 struct nfs4_get_lease_time_args *args;
5390 struct nfs4_get_lease_time_res *res;
5391 struct nfs_client *clp;
5392};
5393
5394static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5395 void *calldata)
5396{
2050f0cc
AA		 5397 struct nfs4_get_lease_time_data *data =
5398 (struct nfs4_get_lease_time_data *)calldata;
5399
5400 dprintk("--> %s\n", __func__);
5401 /* just setup sequence, do not trigger session recovery
5402 since we're invoked within one */
d9afbd1b
TM		 5403 nfs41_setup_sequence(data->clp->cl_session,
5404 &data->args->la_seq_args,
5405 &data->res->lr_seq_res,
5406 task);
2050f0cc
AA		 5407 dprintk("<-- %s\n", __func__);
5408}
5409
5410/*
5411 * Called from nfs4_state_manager thread for session setup, so don't recover
5412 * from sequence operation or clientid errors.
5413 */
5414static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5415{
5416 struct nfs4_get_lease_time_data *data =
5417 (struct nfs4_get_lease_time_data *)calldata;
5418
5419 dprintk("--> %s\n", __func__);
14516c3a
TM		 5420 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5421 return;
2050f0cc
AA		 5422 switch (task->tk_status) {
5423 case -NFS4ERR_DELAY:
5424 case -NFS4ERR_GRACE:
5425 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5426 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5427 task->tk_status = 0;
a8a4ae3a
AA		 5428 /* fall through */
5429 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5430 rpc_restart_call_prepare(task);
2050f0cc
AA		 5431 return;
5432 }
2050f0cc
AA		 5433 dprintk("<-- %s\n", __func__);
5434}
5435
17280175 5436static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5437 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5438 .rpc_call_done = nfs4_get_lease_time_done,
5439};
5440
5441int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5442{
5443 struct rpc_task *task;
5444 struct nfs4_get_lease_time_args args;
5445 struct nfs4_get_lease_time_res res = {
5446 .lr_fsinfo = fsinfo,
5447 };
5448 struct nfs4_get_lease_time_data data = {
5449 .args = &args,
5450 .res = &res,
5451 .clp = clp,
5452 };
5453 struct rpc_message msg = {
5454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5455 .rpc_argp = &args,
5456 .rpc_resp = &res,
5457 };
5458 struct rpc_task_setup task_setup = {
5459 .rpc_client = clp->cl_rpcclient,
5460 .rpc_message = &msg,
5461 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5462 .callback_data = &data,
5463 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5464 };
5465 int status;
5466
9d12b216 5467 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5468 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5469 dprintk("--> %s\n", __func__);
5470 task = rpc_run_task(&task_setup);
5471
5472 if (IS_ERR(task))
5473 status = PTR_ERR(task);
5474 else {
5475 status = task->tk_status;
5476 rpc_put_task(task);
5477 }
5478 dprintk("<-- %s return %d\n", __func__, status);
5479
5480 return status;
5481}
5482
fc931582
AA		 5483/*
5484 * Initialize the values to be used by the client in CREATE_SESSION
5485 * If nfs4_init_session set the fore channel request and response sizes,
5486 * use them.
5487 *
5488 * Set the back channel max_resp_sz_cached to zero to force the client to
5489 * always set csa_cachethis to FALSE because the current implementation
5490 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5491 */
5492static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5493{
5494 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5495 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5496 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5497
5498 if (mxrqst_sz == 0)
5499 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5500 if (mxresp_sz == 0)
5501 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5502 /* Fore channel attributes */
fc931582
AA		 5503 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5504 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5505 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5506 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5507
5508 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5509 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5510 __func__,
5511 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5512 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5513
5514 /* Back channel attributes */
fc931582
AA		 5515 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5516 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5517 args->bc_attrs.max_resp_sz_cached = 0;
5518 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5519 args->bc_attrs.max_reqs = 1;
5520
5521 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5522 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5523 __func__,
5524 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5525 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5526 args->bc_attrs.max_reqs);
5527}
5528
43c2e885 5529static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5530{
43c2e885
BF		 5531 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5532 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5533
43c2e885
BF		 5534 if (rcvd->max_resp_sz > sent->max_resp_sz)
5535 return -EINVAL;
5536 /*
5537 * Our requested max_ops is the minimum we need; we're not
5538 * prepared to break up compounds into smaller pieces than that.
5539 * So, no point even trying to continue if the server won't
5540 * cooperate:
5541 */
5542 if (rcvd->max_ops < sent->max_ops)
5543 return -EINVAL;
5544 if (rcvd->max_reqs == 0)
5545 return -EINVAL;
b4b9a0c1
VG		 5546 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5547 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5548 return 0;
8d35301d
AA		 5549}
5550
43c2e885
BF		 5551static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5552{
5553 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5554 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5555
43c2e885
BF		 5556 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5557 return -EINVAL;
5558 if (rcvd->max_resp_sz < sent->max_resp_sz)
5559 return -EINVAL;
5560 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5561 return -EINVAL;
5562 /* These would render the backchannel useless: */
b4b9a0c1 5563 if (rcvd->max_ops != sent->max_ops)
43c2e885 5564 return -EINVAL;
b4b9a0c1 5565 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5566 return -EINVAL;
5567 return 0;
5568}
8d35301d 5569
8d35301d
AA		 5570static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5571 struct nfs4_session *session)
5572{
43c2e885 5573 int ret;
8d35301d 5574
43c2e885
BF		 5575 ret = nfs4_verify_fore_channel_attrs(args, session);
5576 if (ret)
5577 return ret;
5578 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5579}
5580
848f5bda
TM		 5581static int _nfs4_proc_create_session(struct nfs_client *clp,
5582 struct rpc_cred *cred)
fc931582
AA		 5583{
5584 struct nfs4_session *session = clp->cl_session;
5585 struct nfs41_create_session_args args = {
5586 .client = clp,
5587 .cb_program = NFS4_CALLBACK,
5588 };
5589 struct nfs41_create_session_res res = {
5590 .client = clp,
5591 };
5592 struct rpc_message msg = {
5593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5594 .rpc_argp = &args,
5595 .rpc_resp = &res,
848f5bda 5596 .rpc_cred = cred,
fc931582
AA		 5597 };
5598 int status;
5599
5600 nfs4_init_channel_attrs(&args);
0f91421e 5601 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5602
1bd714f2 5603 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5604
43095d39 5605 if (!status) {
8d35301d
AA		 5606 /* Verify the session's negotiated channel_attrs values */
5607 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5608 /* Increment the clientid slot sequence id */
5609 clp->cl_seqid++;
5610 }
5611
5612 return status;
5613}
5614
5615/*
5616 * Issues a CREATE_SESSION operation to the server.
5617 * It is the responsibility of the caller to verify the session is
5618 * expired before calling this routine.
5619 */
848f5bda 5620int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5621{
5622 int status;
5623 unsigned *ptr;
fc931582
AA		 5624 struct nfs4_session *session = clp->cl_session;
5625
5626 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5627
848f5bda 5628 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5629 if (status)
5630 goto out;
5631
aacd5537
AA		 5632 /* Init or reset the session slot tables */
5633 status = nfs4_setup_session_slot_tables(session);
5634 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5635 if (status)
5636 goto out;
5637
5638 ptr = (unsigned *)&session->sess_id.data[0];
5639 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5640 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5641out:
5642 dprintk("<-- %s\n", __func__);
5643 return status;
5644}
5645
0f3e66c6
AA		 5646/*
5647 * Issue the over-the-wire RPC DESTROY_SESSION.
5648 * The caller must serialize access to this routine.
5649 */
848f5bda
TM		 5650int nfs4_proc_destroy_session(struct nfs4_session *session,
5651 struct rpc_cred *cred)
0f3e66c6 5652{
848f5bda
TM		 5653 struct rpc_message msg = {
5654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5655 .rpc_argp = session,
5656 .rpc_cred = cred,
5657 };
0f3e66c6 5658 int status = 0;
0f3e66c6
AA		 5659
5660 dprintk("--> nfs4_proc_destroy_session\n");
5661
5662 /* session is still being setup */
5663 if (session->clp->cl_cons_state != NFS_CS_READY)
5664 return status;
5665
1bd714f2 5666 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5667
5668 if (status)
08106ac7 5669 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5670 "Session has been destroyed regardless...\n", status);
5671
5672 dprintk("<-- nfs4_proc_destroy_session\n");
5673 return status;
5674}
5675
fc01cea9
AA		 5676/*
5677 * Renew the cl_session lease.
5678 */
d5f8d3fe
TM		 5679struct nfs4_sequence_data {
5680 struct nfs_client *clp;
5681 struct nfs4_sequence_args args;
5682 struct nfs4_sequence_res res;
5683};
5684
dc96aef9
AB		 5685static void nfs41_sequence_release(void *data)
5686{
d5f8d3fe
TM		 5687 struct nfs4_sequence_data *calldata = data;
5688 struct nfs_client *clp = calldata->clp;
dc96aef9 5689
7135840f
AB		 5690 if (atomic_read(&clp->cl_count) > 1)
5691 nfs4_schedule_state_renewal(clp);
5692 nfs_put_client(clp);
d5f8d3fe 5693 kfree(calldata);
dc96aef9
AB		 5694}
5695
aa5190d0
TM		 5696static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5697{
5698 switch(task->tk_status) {
5699 case -NFS4ERR_DELAY:
aa5190d0
TM		 5700 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5701 return -EAGAIN;
5702 default:
0400a6b0 5703 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5704 }
5705 return 0;
5706}
5707
dc96aef9 5708static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5709{
d5f8d3fe
TM		 5710 struct nfs4_sequence_data *calldata = data;
5711 struct nfs_client *clp = calldata->clp;
fc01cea9 5712
14516c3a
TM		 5713 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5714 return;
fc01cea9
AA		 5715
5716 if (task->tk_status < 0) {
5717 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5718 if (atomic_read(&clp->cl_count) == 1)
5719 goto out;
fc01cea9 5720
aa5190d0
TM		 5721 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5722 rpc_restart_call_prepare(task);
fc01cea9
AA		 5723 return;
5724 }
5725 }
fc01cea9 5726 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5727out:
fc01cea9
AA		 5728 dprintk("<-- %s\n", __func__);
5729}
5730
5731static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5732{
d5f8d3fe
TM		 5733 struct nfs4_sequence_data *calldata = data;
5734 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5735 struct nfs4_sequence_args *args;
5736 struct nfs4_sequence_res *res;
5737
fc01cea9
AA		 5738 args = task->tk_msg.rpc_argp;
5739 res = task->tk_msg.rpc_resp;
5740
d9afbd1b 5741 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5742}
5743
5744static const struct rpc_call_ops nfs41_sequence_ops = {
5745 .rpc_call_done = nfs41_sequence_call_done,
5746 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5747 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5748};
5749
8fe72bac
TM		 5750static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5751 struct rpc_cred *cred,
5752 bool is_privileged)
fc01cea9 5753{
d5f8d3fe 5754 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5757 .rpc_cred = cred,
5758 };
71ac6da9
TM		 5759 struct rpc_task_setup task_setup_data = {
5760 .rpc_client = clp->cl_rpcclient,
5761 .rpc_message = &msg,
8fe72bac 5762 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5763 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5764 };
fc01cea9 5765
7135840f 5766 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5767 return ERR_PTR(-EIO);
dfb4f309 5768 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5769 if (calldata == NULL) {
7135840f 5770 nfs_put_client(clp);
71ac6da9 5771 return ERR_PTR(-ENOMEM);
fc01cea9 5772 }
9d12b216 5773 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5774 if (is_privileged)
5775 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5776 msg.rpc_argp = &calldata->args;
5777 msg.rpc_resp = &calldata->res;
5778 calldata->clp = clp;
71ac6da9 5779 task_setup_data.callback_data = calldata;
fc01cea9 5780
71ac6da9
TM		 5781 return rpc_run_task(&task_setup_data);
5782}
5783
2f60ea6b 5784static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5785{
5786 struct rpc_task *task;
5787 int ret = 0;
5788
2f60ea6b
TM		 5789 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5790 return 0;
8fe72bac 5791 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5792 if (IS_ERR(task))
5793 ret = PTR_ERR(task);
5794 else
bf294b41 5795 rpc_put_task_async(task);
71ac6da9
TM		 5796 dprintk("<-- %s status=%d\n", __func__, ret);
5797 return ret;
5798}
5799
5800static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5801{
5802 struct rpc_task *task;
5803 int ret;
5804
8fe72bac 5805 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5806 if (IS_ERR(task)) {
5807 ret = PTR_ERR(task);
5808 goto out;
5809 }
5810 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5811 if (!ret) {
5812 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5813
5814 if (task->tk_status == 0)
5815 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5816 ret = task->tk_status;
b4410c2f 5817 }
71ac6da9
TM		 5818 rpc_put_task(task);
5819out:
5820 dprintk("<-- %s status=%d\n", __func__, ret);
5821 return ret;
fc01cea9
AA		 5822}
5823
fce5c838
RL		 5824struct nfs4_reclaim_complete_data {
5825 struct nfs_client *clp;
5826 struct nfs41_reclaim_complete_args arg;
5827 struct nfs41_reclaim_complete_res res;
5828};
5829
5830static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5831{
5832 struct nfs4_reclaim_complete_data *calldata = data;
5833
d9afbd1b
TM		 5834 nfs41_setup_sequence(calldata->clp->cl_session,
5835 &calldata->arg.seq_args,
5836 &calldata->res.seq_res,
5837 task);
fce5c838
RL		 5838}
5839
aa5190d0
TM		 5840static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5841{
5842 switch(task->tk_status) {
5843 case 0:
5844 case -NFS4ERR_COMPLETE_ALREADY:
5845 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5846 break;
5847 case -NFS4ERR_DELAY:
aa5190d0 5848 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5849 /* fall through */
5850 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5851 return -EAGAIN;
5852 default:
0400a6b0 5853 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5854 }
5855 return 0;
5856}
5857
fce5c838
RL		 5858static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5859{
5860 struct nfs4_reclaim_complete_data *calldata = data;
5861 struct nfs_client *clp = calldata->clp;
5862 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5863
5864 dprintk("--> %s\n", __func__);
14516c3a
TM		 5865 if (!nfs41_sequence_done(task, res))
5866 return;
fce5c838 5867
aa5190d0
TM		 5868 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5869 rpc_restart_call_prepare(task);
5870 return;
5871 }
fce5c838
RL		 5872 dprintk("<-- %s\n", __func__);
5873}
5874
5875static void nfs4_free_reclaim_complete_data(void *data)
5876{
5877 struct nfs4_reclaim_complete_data *calldata = data;
5878
5879 kfree(calldata);
5880}
5881
5882static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5883 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5884 .rpc_call_done = nfs4_reclaim_complete_done,
5885 .rpc_release = nfs4_free_reclaim_complete_data,
5886};
5887
5888/*
5889 * Issue a global reclaim complete.
5890 */
5891static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5892{
5893 struct nfs4_reclaim_complete_data *calldata;
5894 struct rpc_task *task;
5895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5897 };
5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = clp->cl_rpcclient,
5900 .rpc_message = &msg,
5901 .callback_ops = &nfs4_reclaim_complete_call_ops,
5902 .flags = RPC_TASK_ASYNC,
5903 };
5904 int status = -ENOMEM;
5905
5906 dprintk("--> %s\n", __func__);
8535b2be 5907 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5908 if (calldata == NULL)
5909 goto out;
5910 calldata->clp = clp;
5911 calldata->arg.one_fs = 0;
fce5c838 5912
9d12b216 5913 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5914 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5915 msg.rpc_argp = &calldata->arg;
5916 msg.rpc_resp = &calldata->res;
5917 task_setup_data.callback_data = calldata;
5918 task = rpc_run_task(&task_setup_data);
acf82b85 5919 if (IS_ERR(task)) {
fce5c838 5920 status = PTR_ERR(task);
acf82b85
DC		 5921 goto out;
5922 }
c34c32ea
AA		 5923 status = nfs4_wait_for_completion_rpc_task(task);
5924 if (status == 0)
5925 status = task->tk_status;
fce5c838 5926 rpc_put_task(task);
acf82b85 5927 return 0;
fce5c838
RL		 5928out:
5929 dprintk("<-- %s status=%d\n", __func__, status);
5930 return status;
5931}
b1f69b75
AA		 5932
5933static void
5934nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5935{
5936 struct nfs4_layoutget *lgp = calldata;
c31663d4 5937 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 5938 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 5939
5940 dprintk("--> %s\n", __func__);
c31663d4
FI		 5941 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5942 * right now covering the LAYOUTGET we are about to send.
5943 * However, that is not so catastrophic, and there seems
5944 * to be no way to prevent it completely.
5945 */
6ba7db34 5946 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 5947 &lgp->res.seq_res, task))
b1f69b75 5948 return;
cf7d63f1
FI		 5949 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5950 NFS_I(lgp->args.inode)->layout,
5951 lgp->args.ctx->state)) {
5952 rpc_exit(task, NFS4_OK);
cf7d63f1 5953 }
b1f69b75
AA		 5954}
5955
5956static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5957{
5958 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 5959 struct inode *inode = lgp->args.inode;
5960 struct nfs_server *server = NFS_SERVER(inode);
5961 struct pnfs_layout_hdr *lo;
5962 struct nfs4_state *state = NULL;
b1f69b75
AA		 5963
5964 dprintk("--> %s\n", __func__);
5965
6ba7db34 5966 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 5967 goto out;
b1f69b75
AA		 5968
5969 switch (task->tk_status) {
5970 case 0:
ee314c2a 5971 goto out;
b1f69b75
AA		 5972 case -NFS4ERR_LAYOUTTRYLATER:
5973 case -NFS4ERR_RECALLCONFLICT:
5974 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 5975 break;
5976 case -NFS4ERR_EXPIRED:
5977 case -NFS4ERR_BAD_STATEID:
5978 spin_lock(&inode->i_lock);
5979 lo = NFS_I(inode)->layout;
5980 if (!lo || list_empty(&lo->plh_segs)) {
5981 spin_unlock(&inode->i_lock);
5982 /* If the open stateid was bad, then recover it. */
5983 state = lgp->args.ctx->state;
5984 } else {
5985 LIST_HEAD(head);
5986
5987 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
5988 spin_unlock(&inode->i_lock);
5989 /* Mark the bad layout state as invalid, then
5990 * retry using the open stateid. */
5991 pnfs_free_lseg_list(&head);
b1f69b75
AA		 5992 }
5993 }
ee314c2a
TM		 5994 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
5995 rpc_restart_call_prepare(task);
5996out:
b1f69b75
AA		 5997 dprintk("<-- %s\n", __func__);
5998}
5999
8554116e
IK		 6000static size_t max_response_pages(struct nfs_server *server)
6001{
6002 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6003 return nfs_page_array_len(0, max_resp_sz);
6004}
6005
6006static void nfs4_free_pages(struct page **pages, size_t size)
6007{
6008 int i;
6009
6010 if (!pages)
6011 return;
6012
6013 for (i = 0; i < size; i++) {
6014 if (!pages[i])
6015 break;
6016 __free_page(pages[i]);
6017 }
6018 kfree(pages);
6019}
6020
6021static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6022{
6023 struct page **pages;
6024 int i;
6025
6026 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6027 if (!pages) {
6028 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6029 return NULL;
6030 }
6031
6032 for (i = 0; i < size; i++) {
6033 pages[i] = alloc_page(gfp_flags);
6034 if (!pages[i]) {
6035 dprintk("%s: failed to allocate page\n", __func__);
6036 nfs4_free_pages(pages, size);
6037 return NULL;
6038 }
6039 }
6040
6041 return pages;
6042}
6043
b1f69b75
AA		 6044static void nfs4_layoutget_release(void *calldata)
6045{
6046 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6047 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6048 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6049
6050 dprintk("--> %s\n", __func__);
8554116e 6051 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6052 put_nfs_open_context(lgp->args.ctx);
6053 kfree(calldata);
6054 dprintk("<-- %s\n", __func__);
6055}
6056
6057static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6058 .rpc_call_prepare = nfs4_layoutget_prepare,
6059 .rpc_call_done = nfs4_layoutget_done,
6060 .rpc_release = nfs4_layoutget_release,
6061};
6062
a0b0a6e3
TM		 6063struct pnfs_layout_segment *
6064nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6065{
6066 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6067 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6068 struct rpc_task *task;
6069 struct rpc_message msg = {
6070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6071 .rpc_argp = &lgp->args,
6072 .rpc_resp = &lgp->res,
6073 };
6074 struct rpc_task_setup task_setup_data = {
6075 .rpc_client = server->client,
6076 .rpc_message = &msg,
6077 .callback_ops = &nfs4_layoutget_call_ops,
6078 .callback_data = lgp,
6079 .flags = RPC_TASK_ASYNC,
6080 };
a0b0a6e3 6081 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6082 int status = 0;
6083
6084 dprintk("--> %s\n", __func__);
6085
8554116e
IK		 6086 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6087 if (!lgp->args.layout.pages) {
6088 nfs4_layoutget_release(lgp);
a0b0a6e3 6089 return ERR_PTR(-ENOMEM);
8554116e
IK		 6090 }
6091 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6092
35124a09 6093 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6094 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6095 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6096 task = rpc_run_task(&task_setup_data);
6097 if (IS_ERR(task))
a0b0a6e3 6098 return ERR_CAST(task);
b1f69b75 6099 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6100 if (status == 0)
6101 status = task->tk_status;
6102 if (status == 0)
a0b0a6e3 6103 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6104 rpc_put_task(task);
6105 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6106 if (status)
6107 return ERR_PTR(status);
6108 return lseg;
b1f69b75
AA		 6109}
6110
cbe82603
BH		 6111static void
6112nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6113{
6114 struct nfs4_layoutreturn *lrp = calldata;
6115
6116 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6117 nfs41_setup_sequence(lrp->clp->cl_session,
6118 &lrp->args.seq_args,
6119 &lrp->res.seq_res,
6120 task);
cbe82603
BH		 6121}
6122
6123static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6124{
6125 struct nfs4_layoutreturn *lrp = calldata;
6126 struct nfs_server *server;
6127
6128 dprintk("--> %s\n", __func__);
6129
6ba7db34 6130 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6131 return;
6132
6133 server = NFS_SERVER(lrp->args.inode);
6134 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6135 rpc_restart_call_prepare(task);
cbe82603
BH		 6136 return;
6137 }
cbe82603
BH		 6138 dprintk("<-- %s\n", __func__);
6139}
6140
6141static void nfs4_layoutreturn_release(void *calldata)
6142{
6143 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6144 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6145
6146 dprintk("--> %s\n", __func__);
849b286f
TM		 6147 spin_lock(&lo->plh_inode->i_lock);
6148 if (lrp->res.lrs_present)
6149 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6150 lo->plh_block_lgets--;
6151 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6152 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6153 kfree(calldata);
6154 dprintk("<-- %s\n", __func__);
6155}
6156
6157static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6158 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6159 .rpc_call_done = nfs4_layoutreturn_done,
6160 .rpc_release = nfs4_layoutreturn_release,
6161};
6162
6163int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6164{
6165 struct rpc_task *task;
6166 struct rpc_message msg = {
6167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6168 .rpc_argp = &lrp->args,
6169 .rpc_resp = &lrp->res,
6170 };
6171 struct rpc_task_setup task_setup_data = {
6172 .rpc_client = lrp->clp->cl_rpcclient,
6173 .rpc_message = &msg,
6174 .callback_ops = &nfs4_layoutreturn_call_ops,
6175 .callback_data = lrp,
6176 };
6177 int status;
6178
6179 dprintk("--> %s\n", __func__);
9d12b216 6180 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6181 task = rpc_run_task(&task_setup_data);
6182 if (IS_ERR(task))
6183 return PTR_ERR(task);
6184 status = task->tk_status;
6185 dprintk("<-- %s status=%d\n", __func__, status);
6186 rpc_put_task(task);
6187 return status;
6188}
6189
7f11d8d3
AA		 6190/*
6191 * Retrieve the list of Data Server devices from the MDS.
6192 */
6193static int _nfs4_getdevicelist(struct nfs_server *server,
6194 const struct nfs_fh *fh,
6195 struct pnfs_devicelist *devlist)
6196{
6197 struct nfs4_getdevicelist_args args = {
6198 .fh = fh,
6199 .layoutclass = server->pnfs_curr_ld->id,
6200 };
6201 struct nfs4_getdevicelist_res res = {
6202 .devlist = devlist,
6203 };
6204 struct rpc_message msg = {
6205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6206 .rpc_argp = &args,
6207 .rpc_resp = &res,
6208 };
6209 int status;
6210
6211 dprintk("--> %s\n", __func__);
6212 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6213 &res.seq_res, 0);
6214 dprintk("<-- %s status=%d\n", __func__, status);
6215 return status;
6216}
6217
6218int nfs4_proc_getdevicelist(struct nfs_server *server,
6219 const struct nfs_fh *fh,
6220 struct pnfs_devicelist *devlist)
6221{
6222 struct nfs4_exception exception = { };
6223 int err;
6224
6225 do {
6226 err = nfs4_handle_exception(server,
6227 _nfs4_getdevicelist(server, fh, devlist),
6228 &exception);
6229 } while (exception.retry);
6230
6231 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6232 err, devlist->num_devs);
6233
6234 return err;
6235}
6236EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6237
b1f69b75
AA		 6238static int
6239_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6240{
6241 struct nfs4_getdeviceinfo_args args = {
6242 .pdev = pdev,
6243 };
6244 struct nfs4_getdeviceinfo_res res = {
6245 .pdev = pdev,
6246 };
6247 struct rpc_message msg = {
6248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6249 .rpc_argp = &args,
6250 .rpc_resp = &res,
6251 };
6252 int status;
6253
6254 dprintk("--> %s\n", __func__);
7c513058 6255 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6256 dprintk("<-- %s status=%d\n", __func__, status);
6257
6258 return status;
6259}
6260
6261int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6262{
6263 struct nfs4_exception exception = { };
6264 int err;
6265
6266 do {
6267 err = nfs4_handle_exception(server,
6268 _nfs4_proc_getdeviceinfo(server, pdev),
6269 &exception);
6270 } while (exception.retry);
6271 return err;
6272}
6273EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6274
863a3c6c
AA		 6275static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6276{
6277 struct nfs4_layoutcommit_data *data = calldata;
6278 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6279 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6280
d9afbd1b
TM		 6281 nfs41_setup_sequence(session,
6282 &data->args.seq_args,
6283 &data->res.seq_res,
6284 task);
863a3c6c
AA		 6285}
6286
6287static void
6288nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6289{
6290 struct nfs4_layoutcommit_data *data = calldata;
6291 struct nfs_server *server = NFS_SERVER(data->args.inode);
6292
6ba7db34 6293 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6294 return;
6295
6296 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6297 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6298 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6299 case -NFS4ERR_BADLAYOUT: /* no layout */
6300 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6301 task->tk_status = 0;
e59d27e0
TM		 6302 break;
6303 case 0:
863a3c6c
AA		 6304 nfs_post_op_update_inode_force_wcc(data->args.inode,
6305 data->res.fattr);
e59d27e0
TM		 6306 break;
6307 default:
6308 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6309 rpc_restart_call_prepare(task);
6310 return;
6311 }
6312 }
863a3c6c
AA		 6313}
6314
6315static void nfs4_layoutcommit_release(void *calldata)
6316{
6317 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6318 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6319 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6320
db29c089 6321 pnfs_cleanup_layoutcommit(data);
863a3c6c 6322 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6323 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6324 list_del_init(&lseg->pls_lc_list);
6325 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6326 &lseg->pls_flags))
9369a431 6327 pnfs_put_lseg(lseg);
a9bae566 6328 }
92407e75
PT		 6329
6330 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6331 smp_mb__after_clear_bit();
6332 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6333
863a3c6c
AA		 6334 put_rpccred(data->cred);
6335 kfree(data);
6336}
6337
6338static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6339 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6340 .rpc_call_done = nfs4_layoutcommit_done,
6341 .rpc_release = nfs4_layoutcommit_release,
6342};
6343
6344int
ef311537 6345nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6346{
6347 struct rpc_message msg = {
6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6349 .rpc_argp = &data->args,
6350 .rpc_resp = &data->res,
6351 .rpc_cred = data->cred,
6352 };
6353 struct rpc_task_setup task_setup_data = {
6354 .task = &data->task,
6355 .rpc_client = NFS_CLIENT(data->args.inode),
6356 .rpc_message = &msg,
6357 .callback_ops = &nfs4_layoutcommit_ops,
6358 .callback_data = data,
6359 .flags = RPC_TASK_ASYNC,
6360 };
6361 struct rpc_task *task;
6362 int status = 0;
6363
6364 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6365 "lbw: %llu inode %lu\n",
6366 data->task.tk_pid, sync,
6367 data->args.lastbytewritten,
6368 data->args.inode->i_ino);
6369
9d12b216 6370 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6371 task = rpc_run_task(&task_setup_data);
6372 if (IS_ERR(task))
6373 return PTR_ERR(task);
ef311537 6374 if (sync == false)
863a3c6c
AA		 6375 goto out;
6376 status = nfs4_wait_for_completion_rpc_task(task);
6377 if (status != 0)
6378 goto out;
6379 status = task->tk_status;
6380out:
6381 dprintk("%s: status %d\n", __func__, status);
6382 rpc_put_task(task);
6383 return status;
6384}
fca78d6d
BS		 6385
6386static int
6387_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6388 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6389{
6390 struct nfs41_secinfo_no_name_args args = {
6391 .style = SECINFO_STYLE_CURRENT_FH,
6392 };
6393 struct nfs4_secinfo_res res = {
6394 .flavors = flavors,
6395 };
6396 struct rpc_message msg = {
6397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6398 .rpc_argp = &args,
6399 .rpc_resp = &res,
6400 };
6401 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6402}
6403
6404static int
6405nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6406 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6407{
6408 struct nfs4_exception exception = { };
6409 int err;
6410 do {
6411 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6412 switch (err) {
6413 case 0:
6414 case -NFS4ERR_WRONGSEC:
6415 case -NFS4ERR_NOTSUPP:
05e9cfb4 6416 goto out;
fca78d6d
BS		 6417 default:
6418 err = nfs4_handle_exception(server, err, &exception);
6419 }
6420 } while (exception.retry);
05e9cfb4 6421out:
fca78d6d
BS		 6422 return err;
6423}
6424
6425static int
6426nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6427 struct nfs_fsinfo *info)
6428{
6429 int err;
6430 struct page *page;
6431 rpc_authflavor_t flavor;
6432 struct nfs4_secinfo_flavors *flavors;
6433
6434 page = alloc_page(GFP_KERNEL);
6435 if (!page) {
6436 err = -ENOMEM;
6437 goto out;
6438 }
6439
6440 flavors = page_address(page);
6441 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6442
6443 /*
6444 * Fall back on "guess and check" method if
6445 * the server doesn't support SECINFO_NO_NAME
6446 */
6447 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6448 err = nfs4_find_root_sec(server, fhandle, info);
6449 goto out_freepage;
6450 }
6451 if (err)
6452 goto out_freepage;
6453
6454 flavor = nfs_find_best_sec(flavors);
6455 if (err == 0)
6456 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6457
6458out_freepage:
6459 put_page(page);
6460 if (err == -EACCES)
6461 return -EPERM;
6462out:
6463 return err;
6464}
1cab0652
BS		 6465
6466static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6467{
6468 int status;
6469 struct nfs41_test_stateid_args args = {
1cab0652 6470 .stateid = stateid,
7d974794
BS		 6471 };
6472 struct nfs41_test_stateid_res res;
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 };
1cab0652 6478
38527b15 6479 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6480 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6481 nfs4_set_sequence_privileged(&args.seq_args);
6482 status = nfs4_call_sync_sequence(server->client, server, &msg,
6483 &args.seq_args, &res.seq_res);
38527b15
CL		 6484 if (status != NFS_OK) {
6485 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6486 return status;
38527b15
CL		 6487 }
6488 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6489 return -res.status;
7d974794
BS		 6490}
6491
38527b15
CL		 6492/**
6493 * nfs41_test_stateid - perform a TEST_STATEID operation
6494 *
6495 * @server: server / transport on which to perform the operation
6496 * @stateid: state ID to test
6497 *
6498 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6499 * Otherwise a negative NFS4ERR value is returned if the operation
6500 * failed or the state ID is not currently valid.
6501 */
1cab0652 6502static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6503{
6504 struct nfs4_exception exception = { };
6505 int err;
6506 do {
377e507d
CL		 6507 err = _nfs41_test_stateid(server, stateid);
6508 if (err != -NFS4ERR_DELAY)
6509 break;
6510 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6511 } while (exception.retry);
6512 return err;
6513}
9aeda35f 6514
1cab0652 6515static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6516{
9aeda35f 6517 struct nfs41_free_stateid_args args = {
1cab0652 6518 .stateid = stateid,
9aeda35f
BS		 6519 };
6520 struct nfs41_free_stateid_res res;
6521 struct rpc_message msg = {
6522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6523 .rpc_argp = &args,
6524 .rpc_resp = &res,
6525 };
38527b15 6526 int status;
9aeda35f 6527
38527b15 6528 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6529 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6530 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6531 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6532 &args.seq_args, &res.seq_res);
38527b15
CL		 6533 dprintk("NFS reply free_stateid: %d\n", status);
6534 return status;
9aeda35f
BS		 6535}
6536
38527b15
CL		 6537/**
6538 * nfs41_free_stateid - perform a FREE_STATEID operation
6539 *
6540 * @server: server / transport on which to perform the operation
6541 * @stateid: state ID to release
6542 *
6543 * Returns NFS_OK if the server freed "stateid". Otherwise a
6544 * negative NFS4ERR value is returned.
6545 */
1cab0652 6546static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6547{
6548 struct nfs4_exception exception = { };
6549 int err;
6550 do {
377e507d
CL		 6551 err = _nfs4_free_stateid(server, stateid);
6552 if (err != -NFS4ERR_DELAY)
6553 break;
6554 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6555 } while (exception.retry);
6556 return err;
6557}
36281caa
TM		 6558
6559static bool nfs41_match_stateid(const nfs4_stateid *s1,
6560 const nfs4_stateid *s2)
6561{
2d2f24ad 6562 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6563 return false;
6564
2d2f24ad 6565 if (s1->seqid == s2->seqid)
36281caa 6566 return true;
2d2f24ad 6567 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6568 return true;
6569
6570 return false;
6571}
6572
557134a3
AA		 6573#endif /* CONFIG_NFS_V4_1 */
6574
36281caa
TM		 6575static bool nfs4_match_stateid(const nfs4_stateid *s1,
6576 const nfs4_stateid *s2)
6577{
f597c537 6578 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6579}
6580
6581
17280175 6582static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6583 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6584 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6585 .recover_open = nfs4_open_reclaim,
6586 .recover_lock = nfs4_lock_reclaim,
591d71cb 6587 .establish_clid = nfs4_init_clientid,
90a16617 6588 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6589 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6590};
6591
591d71cb 6592#if defined(CONFIG_NFS_V4_1)
17280175 6593static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6594 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6595 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6596 .recover_open = nfs4_open_reclaim,
6597 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6598 .establish_clid = nfs41_init_clientid,
b4b82607 6599 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6600 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6601 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6602};
6603#endif /* CONFIG_NFS_V4_1 */
6604
17280175 6605static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6606 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6607 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6608 .recover_open = nfs4_open_expired,
6609 .recover_lock = nfs4_lock_expired,
6610 .establish_clid = nfs4_init_clientid,
90a16617 6611 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6612};
6613
6614#if defined(CONFIG_NFS_V4_1)
17280175 6615static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6616 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6617 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6618 .recover_open = nfs41_open_expired,
6619 .recover_lock = nfs41_lock_expired,
4d643d1d 6620 .establish_clid = nfs41_init_clientid,
b4b82607 6621 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6622};
591d71cb 6623#endif /* CONFIG_NFS_V4_1 */
1da177e4 6624
17280175 6625static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6626 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6627 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6628 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6629};
6630
6631#if defined(CONFIG_NFS_V4_1)
17280175 6632static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6633 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6634 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6635 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6636};
6637#endif
6638
97dc1359
TM		 6639static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6640 .minor_version = 0,
6641 .call_sync = _nfs4_call_sync,
36281caa 6642 .match_stateid = nfs4_match_stateid,
fca78d6d 6643 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6644 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6645 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6646 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6647};
6648
6649#if defined(CONFIG_NFS_V4_1)
6650static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6651 .minor_version = 1,
104287cd 6652 .call_sync = nfs4_call_sync_sequence,
36281caa 6653 .match_stateid = nfs41_match_stateid,
fca78d6d 6654 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6655 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6656 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6657 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6658};
6659#endif
6660
97dc1359
TM		 6661const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6662 [0] = &nfs_v4_0_minor_ops,
6663#if defined(CONFIG_NFS_V4_1)
6664 [1] = &nfs_v4_1_minor_ops,
6665#endif
6666};
6667
73a79706
BS		 6668const struct inode_operations nfs4_dir_inode_operations = {
6669 .create = nfs_create,
6670 .lookup = nfs_lookup,
6671 .atomic_open = nfs_atomic_open,
6672 .link = nfs_link,
6673 .unlink = nfs_unlink,
6674 .symlink = nfs_symlink,
6675 .mkdir = nfs_mkdir,
6676 .rmdir = nfs_rmdir,
6677 .mknod = nfs_mknod,
6678 .rename = nfs_rename,
6679 .permission = nfs_permission,
6680 .getattr = nfs_getattr,
6681 .setattr = nfs_setattr,
6682 .getxattr = generic_getxattr,
6683 .setxattr = generic_setxattr,
6684 .listxattr = generic_listxattr,
6685 .removexattr = generic_removexattr,
6686};
6687
92e1d5be 6688static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6689 .permission = nfs_permission,
6690 .getattr = nfs_getattr,
6691 .setattr = nfs_setattr,
64c2ce8b
AK		 6692 .getxattr = generic_getxattr,
6693 .setxattr = generic_setxattr,
6694 .listxattr = generic_listxattr,
6695 .removexattr = generic_removexattr,
6b3b5496
BF		 6696};
6697
509de811 6698const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6699 .version = 4, /* protocol version */
6700 .dentry_ops = &nfs4_dentry_operations,
6701 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6702 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6703 .file_ops = &nfs4_file_operations,
1da177e4 6704 .getroot = nfs4_proc_get_root,
281cad46 6705 .submount = nfs4_submount,
ff9099f2 6706 .try_mount = nfs4_try_mount,
1da177e4
LT		 6707 .getattr = nfs4_proc_getattr,
6708 .setattr = nfs4_proc_setattr,
6709 .lookup = nfs4_proc_lookup,
6710 .access = nfs4_proc_access,
6711 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6712 .create = nfs4_proc_create,
6713 .remove = nfs4_proc_remove,
6714 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6715 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6716 .unlink_done = nfs4_proc_unlink_done,
6717 .rename = nfs4_proc_rename,
d3d4152a 6718 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6719 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6720 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6721 .link = nfs4_proc_link,
6722 .symlink = nfs4_proc_symlink,
6723 .mkdir = nfs4_proc_mkdir,
6724 .rmdir = nfs4_proc_remove,
6725 .readdir = nfs4_proc_readdir,
6726 .mknod = nfs4_proc_mknod,
6727 .statfs = nfs4_proc_statfs,
6728 .fsinfo = nfs4_proc_fsinfo,
6729 .pathconf = nfs4_proc_pathconf,
e9326dca 6730 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6731 .decode_dirent = nfs4_decode_dirent,
6732 .read_setup = nfs4_proc_read_setup,
1abb5088 6733 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6734 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6735 .read_done = nfs4_read_done,
1da177e4 6736 .write_setup = nfs4_proc_write_setup,
57208fa7 6737 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6738 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6739 .write_done = nfs4_write_done,
1da177e4 6740 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6741 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6742 .commit_done = nfs4_commit_done,
1da177e4 6743 .lock = nfs4_proc_lock,
e50a1c2e 6744 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6745 .close_context = nfs4_close_context,
2b484297 6746 .open_context = nfs4_atomic_open,
011e2a7f 6747 .have_delegation = nfs4_have_delegation,
57ec14c5 6748 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6749 .alloc_client = nfs4_alloc_client,
45a52a02 6750 .init_client = nfs4_init_client,
cdb7eced 6751 .free_client = nfs4_free_client,
1179acc6
BS		 6752 .create_server = nfs4_create_server,
6753 .clone_server = nfs_clone_server,
1da177e4
LT		 6754};
6755
64c2ce8b
AK		 6756static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6757 .prefix = XATTR_NAME_NFSV4_ACL,
6758 .list = nfs4_xattr_list_nfs4_acl,
6759 .get = nfs4_xattr_get_nfs4_acl,
6760 .set = nfs4_xattr_set_nfs4_acl,
6761};
6762
6763const struct xattr_handler *nfs4_xattr_handlers[] = {
6764 &nfs4_xattr_nfs4_acl_handler,
6765 NULL
6766};
6767
1da177e4
LT		 6768/*
6769 * Local variables:
6770 * c-basic-offset: 8
6771 * End:
6772 */
Linux 6.x block layer and io_uring tree(s)