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NFS: __nfs_find_lock_context needs to check ctx->lock_context for a match too
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
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:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
52567b03 110 default:
1da177e4 111 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 112 __func__, -err);
52567b03 113 break;
1da177e4 114 }
52567b03 115 return -EIO;
1da177e4
LT		 116}
117
118/*
119 * This is our standard bitmap for GETATTR requests.
120 */
1549210f 121const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 122 FATTR4_WORD0_TYPE
123 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_SIZE
125 | FATTR4_WORD0_FSID
126 | FATTR4_WORD0_FILEID,
127 FATTR4_WORD1_MODE
128 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
136};
137
1549210f
TM		 138static const u32 nfs4_pnfs_open_bitmap[3] = {
139 FATTR4_WORD0_TYPE
140 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_SIZE
142 | FATTR4_WORD0_FSID
143 | FATTR4_WORD0_FILEID,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
154};
155
e23008ec
AA		 156static const u32 nfs4_open_noattr_bitmap[3] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_FILEID,
160};
161
1da177e4
LT		 162const u32 nfs4_statfs_bitmap[2] = {
163 FATTR4_WORD0_FILES_AVAIL
164 | FATTR4_WORD0_FILES_FREE
165 | FATTR4_WORD0_FILES_TOTAL,
166 FATTR4_WORD1_SPACE_AVAIL
167 | FATTR4_WORD1_SPACE_FREE
168 | FATTR4_WORD1_SPACE_TOTAL
169};
170
4ce79717 171const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 172 FATTR4_WORD0_MAXLINK
173 | FATTR4_WORD0_MAXNAME,
174 0
175};
176
dae100c2 177const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 178 | FATTR4_WORD0_MAXREAD
179 | FATTR4_WORD0_MAXWRITE
180 | FATTR4_WORD0_LEASE_TIME,
55b6e774 181 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 182 | FATTR4_WORD1_FS_LAYOUT_TYPES,
183 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 184};
185
830b8e33
MN		 186const u32 nfs4_fs_locations_bitmap[2] = {
187 FATTR4_WORD0_TYPE
188 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_SIZE
190 | FATTR4_WORD0_FSID
191 | FATTR4_WORD0_FILEID
192 | FATTR4_WORD0_FS_LOCATIONS,
193 FATTR4_WORD1_MODE
194 | FATTR4_WORD1_NUMLINKS
195 | FATTR4_WORD1_OWNER
196 | FATTR4_WORD1_OWNER_GROUP
197 | FATTR4_WORD1_RAWDEV
198 | FATTR4_WORD1_SPACE_USED
199 | FATTR4_WORD1_TIME_ACCESS
200 | FATTR4_WORD1_TIME_METADATA
201 | FATTR4_WORD1_TIME_MODIFY
202 | FATTR4_WORD1_MOUNTED_ON_FILEID
203};
204
bc4785cd 205static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 206 struct nfs4_readdir_arg *readdir)
207{
0dbb4c67 208 __be32 *start, *p;
1da177e4 209
1da177e4 210 if (cookie > 2) {
b7ef1956 211 readdir->cookie = cookie;
1da177e4
LT		 212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
213 return;
214 }
215
216 readdir->cookie = 0;
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
218 if (cookie == 2)
219 return;
220
221 /*
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
226 * instead of 1 or 2.
227 */
2b86ce2d 228 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 229
230 if (cookie == 0) {
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
236 p++;
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
4e769b93 240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 241 }
242
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
248 p++;
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
4e769b93 252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 253
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
2b86ce2d 256 kunmap_atomic(start);
1da177e4
LT		 257}
258
65de872e
TM		 259static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
260{
261 int res = 0;
262
263 might_sleep();
264
265 if (*timeout <= 0)
266 *timeout = NFS4_POLL_RETRY_MIN;
267 if (*timeout > NFS4_POLL_RETRY_MAX)
268 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 269 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 270 if (fatal_signal_pending(current))
271 res = -ERESTARTSYS;
272 *timeout <<= 1;
273 return res;
274}
275
276/* This is the error handling routine for processes that are allowed
277 * to sleep.
278 */
b064eca2 279static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 280{
281 struct nfs_client *clp = server->nfs_client;
9e33bed5 282 struct nfs4_state *state = exception->state;
3114ea7a 283 struct inode *inode = exception->inode;
65de872e
TM		 284 int ret = errorcode;
285
286 exception->retry = 0;
287 switch(errorcode) {
288 case 0:
289 return 0;
3114ea7a 290 case -NFS4ERR_OPENMODE:
011e2a7f 291 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 292 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 293 exception->retry = 1;
294 return 0;
295 }
296 if (state == NULL)
297 break;
5d422301
TM		 298 ret = nfs4_schedule_stateid_recovery(server, state);
299 if (ret < 0)
300 break;
3114ea7a 301 goto wait_on_recovery;
a1d0b5ee 302 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 303 case -NFS4ERR_ADMIN_REVOKED:
304 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 305 if (state == NULL)
306 break;
14977489 307 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 308 ret = nfs4_schedule_stateid_recovery(server, state);
309 if (ret < 0)
310 break;
0400a6b0 311 goto wait_on_recovery;
0ced63d1 312 case -NFS4ERR_EXPIRED:
5d422301
TM		 313 if (state != NULL) {
314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
317 }
65de872e 318 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 319 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 320 nfs4_schedule_lease_recovery(clp);
321 goto wait_on_recovery;
03391693 322#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 323 case -NFS4ERR_BADSESSION:
324 case -NFS4ERR_BADSLOT:
325 case -NFS4ERR_BAD_HIGH_SLOT:
326 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
327 case -NFS4ERR_DEADSESSION:
328 case -NFS4ERR_SEQ_FALSE_RETRY:
329 case -NFS4ERR_SEQ_MISORDERED:
330 dprintk("%s ERROR: %d Reset session\n", __func__,
331 errorcode);
9f594791 332 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 333 goto wait_on_recovery;
03391693 334#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 335 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
338 * fail
339 */
340 ret = -EBUSY;
341 break;
342 }
65de872e
TM		 343 case -NFS4ERR_GRACE:
344 case -NFS4ERR_DELAY:
345 ret = nfs4_delay(server->client, &exception->timeout);
346 if (ret != 0)
347 break;
a8a4ae3a 348 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 349 case -NFS4ERR_OLD_STATEID:
350 exception->retry = 1;
b064eca2
TM		 351 break;
352 case -NFS4ERR_BADOWNER:
353 /* The following works around a Linux server bug! */
354 case -NFS4ERR_BADNAME:
355 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
356 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
357 exception->retry = 1;
358 printk(KERN_WARNING "NFS: v4 server %s "
359 "does not accept raw "
360 "uid/gids. "
361 "Reenabling the idmapper.\n",
362 server->nfs_client->cl_hostname);
363 }
65de872e
TM		 364 }
365 /* We failed to handle the error */
366 return nfs4_map_errors(ret);
0400a6b0 367wait_on_recovery:
a2c0b9e2
TM		 368 ret = nfs4_wait_clnt_recover(clp);
369 if (ret == 0)
370 exception->retry = 1;
371 return ret;
65de872e
TM		 372}
373
374
452e9352 375static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 376{
1da177e4
LT		 377 spin_lock(&clp->cl_lock);
378 if (time_before(clp->cl_last_renewal,timestamp))
379 clp->cl_last_renewal = timestamp;
380 spin_unlock(&clp->cl_lock);
381}
382
452e9352
TM		 383static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
384{
385 do_renew_lease(server->nfs_client, timestamp);
386}
387
cccef3b9
AA		 388#if defined(CONFIG_NFS_V4_1)
389
d185a334 390static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 391{
e3725ec0 392 struct nfs4_session *session;
13615871 393 struct nfs4_slot_table *tbl;
c10e4498 394 bool send_new_highest_used_slotid = false;
13615871 395
dfb4f309 396 if (!res->sr_slot) {
13615871
AA		 397 /* just wake up the next guy waiting since
398 * we may have not consumed a slot after all */
691daf3b 399 dprintk("%s: No slot\n", __func__);
35dc1d74 400 return;
13615871 401 }
e3725ec0
TM		 402 tbl = res->sr_slot->table;
403 session = tbl->session;
ea028ac9 404
35dc1d74 405 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 406 /* Be nice to the server: try to ensure that the last transmitted
407 * value for highest_user_slotid <= target_highest_slotid
408 */
409 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
410 send_new_highest_used_slotid = true;
411
b75ad4cd
TM		 412 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
413 send_new_highest_used_slotid = false;
414 goto out_unlock;
415 }
f4af6e2a 416 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 417
418 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
419 send_new_highest_used_slotid = false;
b75ad4cd 420out_unlock:
35dc1d74 421 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 422 res->sr_slot = NULL;
c10e4498
TM		 423 if (send_new_highest_used_slotid)
424 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 425}
426
14516c3a 427static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 428{
e3725ec0 429 struct nfs4_session *session;
933602e3 430 struct nfs4_slot *slot;
14516c3a 431 struct nfs_client *clp;
ac20d163 432 bool interrupted = false;
85563073 433 int ret = 1;
b0df806c 434
468f8613
BS		 435 /* don't increment the sequence number if the task wasn't sent */
436 if (!RPC_WAS_SENT(task))
b0df806c
AA		 437 goto out;
438
933602e3 439 slot = res->sr_slot;
e3725ec0 440 session = slot->table->session;
933602e3 441
ac20d163
TM		 442 if (slot->interrupted) {
443 slot->interrupted = 0;
444 interrupted = true;
445 }
446
691daf3b 447 /* Check the SEQUENCE operation status */
14516c3a
TM		 448 switch (res->sr_status) {
449 case 0:
b0df806c 450 /* Update the slot's sequence and clientid lease timer */
933602e3 451 ++slot->seq_nr;
e3725ec0 452 clp = session->clp;
8e63b6a8 453 do_renew_lease(clp, res->sr_timestamp);
0629e370 454 /* Check sequence flags */
b4410c2f
TM		 455 if (res->sr_status_flags != 0)
456 nfs4_schedule_lease_recovery(clp);
464ee9f9 457 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 458 break;
ac20d163
TM		 459 case 1:
460 /*
461 * sr_status remains 1 if an RPC level error occurred.
462 * The server may or may not have processed the sequence
463 * operation..
464 * Mark the slot as having hosted an interrupted RPC call.
465 */
466 slot->interrupted = 1;
467 goto out;
14516c3a
TM		 468 case -NFS4ERR_DELAY:
469 /* The server detected a resend of the RPC call and
470 * returned NFS4ERR_DELAY as per Section 2.10.6.2
471 * of RFC5661.
472 */
df2fabff 473 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 474 __func__,
df2fabff 475 slot->slot_nr,
933602e3 476 slot->seq_nr);
14516c3a 477 goto out_retry;
85563073
TM		 478 case -NFS4ERR_BADSLOT:
479 /*
480 * The slot id we used was probably retired. Try again
481 * using a different slot id.
482 */
e8794440
TM		 483 goto retry_nowait;
484 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 485 /*
486 * Was the last operation on this sequence interrupted?
487 * If so, retry after bumping the sequence number.
488 */
489 if (interrupted) {
490 ++slot->seq_nr;
491 goto retry_nowait;
492 }
e8794440
TM		 493 /*
494 * Could this slot have been previously retired?
495 * If so, then the server may be expecting seq_nr = 1!
496 */
8e63b6a8
TM		 497 if (slot->seq_nr != 1) {
498 slot->seq_nr = 1;
499 goto retry_nowait;
500 }
501 break;
e8794440
TM		 502 case -NFS4ERR_SEQ_FALSE_RETRY:
503 ++slot->seq_nr;
504 goto retry_nowait;
14516c3a
TM		 505 default:
506 /* Just update the slot sequence no. */
933602e3 507 ++slot->seq_nr;
b0df806c
AA		 508 }
509out:
510 /* The session may be reset by one of the error handlers. */
511 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 512 nfs41_sequence_free_slot(res);
85563073 513 return ret;
e8794440
TM		 514retry_nowait:
515 if (rpc_restart_call_prepare(task)) {
516 task->tk_status = 0;
517 ret = 0;
518 }
519 goto out;
14516c3a 520out_retry:
d05dd4e9 521 if (!rpc_restart_call(task))
14516c3a
TM		 522 goto out;
523 rpc_delay(task, NFS4_POLL_RETRY_MAX);
524 return 0;
b0df806c
AA		 525}
526
14516c3a
TM		 527static int nfs4_sequence_done(struct rpc_task *task,
528 struct nfs4_sequence_res *res)
df896455 529{
e3725ec0 530 if (res->sr_slot == NULL)
14516c3a
TM		 531 return 1;
532 return nfs41_sequence_done(task, res);
df896455
TM		 533}
534
9d12b216
TM		 535static void nfs41_init_sequence(struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res, int cache_reply)
537{
2b2fa717 538 args->sa_slot = NULL;
9d12b216 539 args->sa_cache_this = 0;
8fe72bac 540 args->sa_privileged = 0;
9d12b216
TM		 541 if (cache_reply)
542 args->sa_cache_this = 1;
9d12b216
TM		 543 res->sr_slot = NULL;
544}
545
8fe72bac
TM		 546static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
547{
548 args->sa_privileged = 1;
549}
550
dc70d7b3 551int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
ce5039c1
AA		 554 struct rpc_task *task)
555{
fbcd4abc
AA		 556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 558
559 dprintk("--> %s\n", __func__);
ce5039c1 560 /* slot already allocated? */
dfb4f309 561 if (res->sr_slot != NULL)
d9afbd1b 562 goto out_success;
ce5039c1 563
fbcd4abc
AA		 564 tbl = &session->fc_slot_table;
565
69d206b5
TM		 566 task->tk_timeout = 0;
567
fbcd4abc 568 spin_lock(&tbl->slot_tbl_lock);
a2118c33 569 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 570 !args->sa_privileged) {
0b1c8fc4 571 /* The state manager will wait until the slot table is empty */
0b1c8fc4 572 dprintk("%s session is draining\n", __func__);
7b939a3f 573 goto out_sleep;
689cf5c1
AB		 574 }
575
2dc03b7f 576 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 577 if (IS_ERR(slot)) {
578 /* If out of memory, try again in 1/4 second */
579 if (slot == ERR_PTR(-ENOMEM))
580 task->tk_timeout = HZ >> 2;
fbcd4abc 581 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 582 goto out_sleep;
fbcd4abc
AA		 583 }
584 spin_unlock(&tbl->slot_tbl_lock);
585
2b2fa717 586 args->sa_slot = slot;
fbcd4abc 587
2dc03b7f
TM		 588 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
589 slot->slot_nr, slot->seq_nr);
fbcd4abc 590
dfb4f309 591 res->sr_slot = slot;
8e63b6a8 592 res->sr_timestamp = jiffies;
2a6e26cd 593 res->sr_status_flags = 0;
fbcd4abc
AA		 594 /*
595 * sr_status is only set in decode_sequence, and so will remain
596 * set to 1 if an rpc level failure occurs.
597 */
598 res->sr_status = 1;
d9afbd1b
TM		 599out_success:
600 rpc_call_start(task);
ce5039c1 601 return 0;
7b939a3f 602out_sleep:
8fe72bac
TM		 603 /* Privileged tasks are queued with top priority */
604 if (args->sa_privileged)
1e1093c7
TM		 605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
ce5039c1 611}
dc70d7b3 612EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 613
035168ab 614int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
ce5039c1
AA		 617 struct rpc_task *task)
618{
035168ab 619 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 620 int ret = 0;
621
d9afbd1b
TM		 622 if (session == NULL) {
623 rpc_call_start(task);
035168ab 624 goto out;
d9afbd1b 625 }
035168ab 626
df2fabff 627 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 628 __func__, session->clp, session, res->sr_slot ?
df2fabff 629 res->sr_slot->slot_nr : -1);
ce5039c1 630
9d12b216 631 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 632out:
633 dprintk("<-- %s status=%d\n", __func__, ret);
634 return ret;
635}
636
637struct nfs41_call_sync_data {
035168ab 638 const struct nfs_server *seq_server;
ce5039c1
AA		 639 struct nfs4_sequence_args *seq_args;
640 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 641};
642
643static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
644{
645 struct nfs41_call_sync_data *data = calldata;
6ba7db34 646 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 647
035168ab
TM		 648 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
649
d9afbd1b 650 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 651}
652
69ab40c4
AA		 653static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
654{
655 struct nfs41_call_sync_data *data = calldata;
656
14516c3a 657 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 658}
659
17280175 660static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 661 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 662 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 663};
664
7c513058
BS		 665static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
666 struct nfs_server *server,
ce5039c1
AA		 667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
8fe72bac 669 struct nfs4_sequence_res *res)
ce5039c1
AA		 670{
671 int ret;
672 struct rpc_task *task;
673 struct nfs41_call_sync_data data = {
035168ab 674 .seq_server = server,
ce5039c1
AA		 675 .seq_args = args,
676 .seq_res = res,
ce5039c1
AA		 677 };
678 struct rpc_task_setup task_setup = {
7c513058 679 .rpc_client = clnt,
ce5039c1
AA		 680 .rpc_message = msg,
681 .callback_ops = &nfs41_call_sync_ops,
682 .callback_data = &data
683 };
684
ce5039c1
AA		 685 task = rpc_run_task(&task_setup);
686 if (IS_ERR(task))
687 ret = PTR_ERR(task);
688 else {
689 ret = task->tk_status;
690 rpc_put_task(task);
691 }
692 return ret;
693}
694
df896455 695#else
8fe72bac 696static
9d12b216
TM		 697void nfs41_init_sequence(struct nfs4_sequence_args *args,
698 struct nfs4_sequence_res *res, int cache_reply)
699{
700}
701
8fe72bac
TM		 702static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
703{
704}
705
706
14516c3a
TM		 707static int nfs4_sequence_done(struct rpc_task *task,
708 struct nfs4_sequence_res *res)
df896455 709{
14516c3a 710 return 1;
df896455 711}
cccef3b9
AA		 712#endif /* CONFIG_NFS_V4_1 */
713
fd0c0953 714static
7c513058
BS		 715int _nfs4_call_sync(struct rpc_clnt *clnt,
716 struct nfs_server *server,
cccef3b9
AA		 717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
fd0c0953 719 struct nfs4_sequence_res *res)
cccef3b9 720{
7c513058 721 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 722}
723
fd0c0953 724static
7c513058
BS		 725int nfs4_call_sync(struct rpc_clnt *clnt,
726 struct nfs_server *server,
e73b83f2
BS		 727 struct rpc_message *msg,
728 struct nfs4_sequence_args *args,
729 struct nfs4_sequence_res *res,
730 int cache_reply)
731{
fd0c0953 732 nfs41_init_sequence(args, res, cache_reply);
7c513058 733 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 734 args, res);
e73b83f2 735}
cccef3b9 736
38478b24 737static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 738{
38478b24 739 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 740
38478b24 741 spin_lock(&dir->i_lock);
359d7d1c 742 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 743 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 744 nfs_force_lookup_revalidate(dir);
a9a4a87a 745 dir->i_version = cinfo->after;
de242c0b 746 nfs_fscache_invalidate(dir);
38478b24 747 spin_unlock(&dir->i_lock);
1da177e4
LT		 748}
749
e56e0b78 750struct nfs4_opendata {
c6d00e63 751 struct kref kref;
e56e0b78
TM		 752 struct nfs_openargs o_arg;
753 struct nfs_openres o_res;
cdd4e68b
TM		 754 struct nfs_open_confirmargs c_arg;
755 struct nfs_open_confirmres c_res;
6926afd1
TM		 756 struct nfs4_string owner_name;
757 struct nfs4_string group_name;
e56e0b78 758 struct nfs_fattr f_attr;
e56e0b78 759 struct dentry *dir;
82a2c1b7 760 struct dentry *dentry;
e56e0b78 761 struct nfs4_state_owner *owner;
aac00a8d 762 struct nfs4_state *state;
e56e0b78 763 struct iattr attrs;
26e976a8 764 unsigned long timestamp;
3e309914 765 unsigned int rpc_done : 1;
24ac23ab
TM		 766 int rpc_status;
767 int cancelled;
e56e0b78
TM		 768};
769
2ced46c2
TM		 770
771static void nfs4_init_opendata_res(struct nfs4_opendata *p)
772{
773 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 774 p->o_res.seqid = p->o_arg.seqid;
775 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 776 p->o_res.server = p->o_arg.server;
5f657530 777 p->o_res.access_request = p->o_arg.access;
2ced46c2 778 nfs_fattr_init(&p->f_attr);
6926afd1 779 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 780}
781
82a2c1b7 782static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 783 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 784 const struct iattr *attrs,
785 gfp_t gfp_mask)
e56e0b78 786{
82a2c1b7 787 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 788 struct inode *dir = parent->d_inode;
789 struct nfs_server *server = NFS_SERVER(dir);
790 struct nfs4_opendata *p;
791
8535b2be 792 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 793 if (p == NULL)
794 goto err;
8535b2be 795 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 796 if (p->o_arg.seqid == NULL)
797 goto err_free;
82a2c1b7
AV		 798 nfs_sb_active(dentry->d_sb);
799 p->dentry = dget(dentry);
e56e0b78
TM		 800 p->dir = parent;
801 p->owner = sp;
802 atomic_inc(&sp->so_count);
803 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 804 p->o_arg.open_flags = flags;
805 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 806 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
807 * will return permission denied for all bits until close */
808 if (!(flags & O_EXCL)) {
809 /* ask server to check for all possible rights as results
810 * are cached */
811 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
812 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 813 }
7539bbab 814 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 815 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
816 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 817 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 818 p->o_arg.server = server;
819 p->o_arg.bitmask = server->attr_bitmask;
1549210f 820 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 821 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 822 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 823 __be32 verf[2];
d77d76ff 824
e56e0b78
TM		 825 p->o_arg.u.attrs = &p->attrs;
826 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 827
828 verf[0] = jiffies;
829 verf[1] = current->pid;
830 memcpy(p->o_arg.u.verifier.data, verf,
831 sizeof(p->o_arg.u.verifier.data));
e56e0b78 832 }
cdd4e68b
TM		 833 p->c_arg.fh = &p->o_res.fh;
834 p->c_arg.stateid = &p->o_res.stateid;
835 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 836 nfs4_init_opendata_res(p);
c6d00e63 837 kref_init(&p->kref);
e56e0b78
TM		 838 return p;
839err_free:
840 kfree(p);
841err:
842 dput(parent);
843 return NULL;
844}
845
c6d00e63 846static void nfs4_opendata_free(struct kref *kref)
e56e0b78 847{
c6d00e63
TM		 848 struct nfs4_opendata *p = container_of(kref,
849 struct nfs4_opendata, kref);
82a2c1b7 850 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 851
852 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 853 if (p->state != NULL)
854 nfs4_put_open_state(p->state);
c6d00e63
TM		 855 nfs4_put_state_owner(p->owner);
856 dput(p->dir);
82a2c1b7
AV		 857 dput(p->dentry);
858 nfs_sb_deactive(sb);
6926afd1 859 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 860 kfree(p);
861}
862
863static void nfs4_opendata_put(struct nfs4_opendata *p)
864{
865 if (p != NULL)
866 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 867}
868
06f814a3
TM		 869static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
870{
06f814a3
TM		 871 int ret;
872
06f814a3 873 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 874 return ret;
875}
876
dc0b027d 877static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 878{
879 int ret = 0;
dc0b027d 880
536e43d1 881 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 882 goto out;
883 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 884 case FMODE_READ:
88069f77
TM		 885 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
886 && state->n_rdonly != 0;
6ee41268
TM		 887 break;
888 case FMODE_WRITE:
88069f77
TM		 889 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
890 && state->n_wronly != 0;
6ee41268
TM		 891 break;
892 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 893 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
894 && state->n_rdwr != 0;
6ee41268 895 }
dc0b027d 896out:
6ee41268
TM		 897 return ret;
898}
899
dc0b027d 900static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 901{
652f89f6
TM		 902 if (delegation == NULL)
903 return 0;
dc0b027d 904 if ((delegation->type & fmode) != fmode)
aac00a8d 905 return 0;
15c831bf 906 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 907 return 0;
d25be546
TM		 908 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
909 return 0;
b7391f44 910 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 911 return 1;
912}
913
dc0b027d 914static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 915{
dc0b027d 916 switch (fmode) {
e7616923
TM		 917 case FMODE_WRITE:
918 state->n_wronly++;
919 break;
920 case FMODE_READ:
921 state->n_rdonly++;
922 break;
923 case FMODE_READ|FMODE_WRITE:
924 state->n_rdwr++;
925 }
dc0b027d 926 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 927}
928
dc0b027d 929static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 930{
931 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 932 nfs4_stateid_copy(&state->stateid, stateid);
933 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 934 switch (fmode) {
003707c7
TM		 935 case FMODE_READ:
936 set_bit(NFS_O_RDONLY_STATE, &state->flags);
937 break;
938 case FMODE_WRITE:
939 set_bit(NFS_O_WRONLY_STATE, &state->flags);
940 break;
941 case FMODE_READ|FMODE_WRITE:
942 set_bit(NFS_O_RDWR_STATE, &state->flags);
943 }
e7616923
TM		 944}
945
dc0b027d 946static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 947{
8bda4e4c 948 write_seqlock(&state->seqlock);
dc0b027d 949 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 950 write_sequnlock(&state->seqlock);
003707c7
TM		 951}
952
dc0b027d 953static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 954{
8bda4e4c
TM		 955 /*
956 * Protect the call to nfs4_state_set_mode_locked and
957 * serialise the stateid update
958 */
959 write_seqlock(&state->seqlock);
003707c7 960 if (deleg_stateid != NULL) {
f597c537 961 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 962 set_bit(NFS_DELEGATED_STATE, &state->flags);
963 }
964 if (open_stateid != NULL)
dc0b027d 965 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 966 write_sequnlock(&state->seqlock);
967 spin_lock(&state->owner->so_lock);
dc0b027d 968 update_open_stateflags(state, fmode);
ec073428 969 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 970}
971
dc0b027d 972static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 973{
974 struct nfs_inode *nfsi = NFS_I(state->inode);
975 struct nfs_delegation *deleg_cur;
976 int ret = 0;
977
dc0b027d 978 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 979
980 rcu_read_lock();
981 deleg_cur = rcu_dereference(nfsi->delegation);
982 if (deleg_cur == NULL)
983 goto no_delegation;
984
985 spin_lock(&deleg_cur->lock);
986 if (nfsi->delegation != deleg_cur ||
d25be546 987 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 988 (deleg_cur->type & fmode) != fmode)
34310430
TM		 989 goto no_delegation_unlock;
990
991 if (delegation == NULL)
992 delegation = &deleg_cur->stateid;
f597c537 993 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 994 goto no_delegation_unlock;
995
b7391f44 996 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 997 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 998 ret = 1;
999no_delegation_unlock:
1000 spin_unlock(&deleg_cur->lock);
1001no_delegation:
1002 rcu_read_unlock();
1003
1004 if (!ret && open_stateid != NULL) {
dc0b027d 1005 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1006 ret = 1;
1007 }
1008
1009 return ret;
1010}
1011
1012
dc0b027d 1013static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1014{
1015 struct nfs_delegation *delegation;
1016
1017 rcu_read_lock();
1018 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1019 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1020 rcu_read_unlock();
1021 return;
1022 }
1023 rcu_read_unlock();
57ec14c5 1024 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1025}
1026
6ee41268 1027static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1028{
1029 struct nfs4_state *state = opendata->state;
1030 struct nfs_inode *nfsi = NFS_I(state->inode);
1031 struct nfs_delegation *delegation;
536e43d1 1032 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1033 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1034 nfs4_stateid stateid;
1035 int ret = -EAGAIN;
1036
aac00a8d 1037 for (;;) {
dc0b027d 1038 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1039 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1040 if (can_open_cached(state, fmode, open_mode)) {
1041 update_open_stateflags(state, fmode);
6ee41268 1042 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1043 goto out_return_state;
1044 }
1045 spin_unlock(&state->owner->so_lock);
1046 }
34310430
TM		 1047 rcu_read_lock();
1048 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1049 if (!can_open_delegated(delegation, fmode)) {
34310430 1050 rcu_read_unlock();
aac00a8d 1051 break;
34310430 1052 }
aac00a8d 1053 /* Save the delegation */
f597c537 1054 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1055 rcu_read_unlock();
af22f94a 1056 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1057 if (ret != 0)
1058 goto out;
1059 ret = -EAGAIN;
34310430
TM		 1060
1061 /* Try to update the stateid using the delegation */
dc0b027d 1062 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1063 goto out_return_state;
aac00a8d 1064 }
aac00a8d
TM		 1065out:
1066 return ERR_PTR(ret);
1067out_return_state:
1068 atomic_inc(&state->count);
1069 return state;
1070}
1071
e23008ec
AA		 1072static void
1073nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1074{
1075 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1076 struct nfs_delegation *delegation;
1077 int delegation_flags = 0;
1078
1079 rcu_read_lock();
1080 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1081 if (delegation)
1082 delegation_flags = delegation->flags;
1083 rcu_read_unlock();
1084 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1085 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1086 "returning a delegation for "
1087 "OPEN(CLAIM_DELEGATE_CUR)\n",
1088 clp->cl_hostname);
1089 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1090 nfs_inode_set_delegation(state->inode,
1091 data->owner->so_cred,
1092 &data->o_res);
1093 else
1094 nfs_inode_reclaim_delegation(state->inode,
1095 data->owner->so_cred,
1096 &data->o_res);
1097}
1098
1099/*
1100 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1101 * and update the nfs4_state.
1102 */
1103static struct nfs4_state *
1104_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1105{
1106 struct inode *inode = data->state->inode;
1107 struct nfs4_state *state = data->state;
1108 int ret;
1109
1110 if (!data->rpc_done) {
1111 ret = data->rpc_status;
1112 goto err;
1113 }
1114
1115 ret = -ESTALE;
1116 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1117 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1118 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1119 goto err;
1120
1121 ret = -ENOMEM;
1122 state = nfs4_get_open_state(inode, data->owner);
1123 if (state == NULL)
1124 goto err;
1125
1126 ret = nfs_refresh_inode(inode, &data->f_attr);
1127 if (ret)
1128 goto err;
1129
1130 if (data->o_res.delegation_type != 0)
1131 nfs4_opendata_check_deleg(data, state);
1132 update_open_stateid(state, &data->o_res.stateid, NULL,
1133 data->o_arg.fmode);
1134
1135 return state;
1136err:
1137 return ERR_PTR(ret);
1138
1139}
1140
1141static struct nfs4_state *
1142_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1143{
1144 struct inode *inode;
1145 struct nfs4_state *state = NULL;
1b370bc2 1146 int ret;
24ac23ab 1147
aac00a8d 1148 if (!data->rpc_done) {
6ee41268 1149 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1150 goto out;
1151 }
1152
1b370bc2 1153 ret = -EAGAIN;
24ac23ab 1154 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1155 goto err;
24ac23ab 1156 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1157 ret = PTR_ERR(inode);
03f28e3a 1158 if (IS_ERR(inode))
1b370bc2
TM		 1159 goto err;
1160 ret = -ENOMEM;
24ac23ab
TM		 1161 state = nfs4_get_open_state(inode, data->owner);
1162 if (state == NULL)
1b370bc2 1163 goto err_put_inode;
e23008ec
AA		 1164 if (data->o_res.delegation_type != 0)
1165 nfs4_opendata_check_deleg(data, state);
34310430 1166 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1167 data->o_arg.fmode);
24ac23ab 1168 iput(inode);
aac00a8d 1169out:
7aa262b5 1170 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1171 return state;
1b370bc2
TM		 1172err_put_inode:
1173 iput(inode);
1174err:
1175 return ERR_PTR(ret);
24ac23ab
TM		 1176}
1177
e23008ec
AA		 1178static struct nfs4_state *
1179nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1180{
1181 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1182 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1183 return _nfs4_opendata_to_nfs4_state(data);
1184}
1185
864472e9
TM		 1186static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_open_context *ctx;
1190
1191 spin_lock(&state->inode->i_lock);
1192 list_for_each_entry(ctx, &nfsi->open_files, list) {
1193 if (ctx->state != state)
1194 continue;
1195 get_nfs_open_context(ctx);
1196 spin_unlock(&state->inode->i_lock);
1197 return ctx;
1198 }
1199 spin_unlock(&state->inode->i_lock);
1200 return ERR_PTR(-ENOENT);
1201}
1202
6f220ed5
TM		 1203static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1204{
1205 struct nfs4_opendata *opendata;
1206
3d4ff43d 1207 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1208 if (opendata == NULL)
1209 return ERR_PTR(-ENOMEM);
1210 opendata->state = state;
1211 atomic_inc(&state->count);
1212 return opendata;
1213}
1214
dc0b027d 1215static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1216{
2ced46c2 1217 struct nfs4_state *newstate;
864472e9
TM		 1218 int ret;
1219
dc0b027d
TM		 1220 opendata->o_arg.open_flags = 0;
1221 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1222 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1223 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1224 nfs4_init_opendata_res(opendata);
b257957e 1225 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1226 if (ret != 0)
1227 return ret;
2ced46c2 1228 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1229 if (IS_ERR(newstate))
1230 return PTR_ERR(newstate);
643168c2 1231 nfs4_close_state(newstate, fmode);
2ced46c2 1232 *res = newstate;
864472e9
TM		 1233 return 0;
1234}
1235
1236static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1237{
864472e9 1238 struct nfs4_state *newstate;
864472e9
TM		 1239 int ret;
1240
1241 /* memory barrier prior to reading state->n_* */
2ced46c2 1242 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1243 smp_rmb();
1244 if (state->n_rdwr != 0) {
b0ed9dbc 1245 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1246 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1247 if (ret != 0)
1248 return ret;
2ced46c2
TM		 1249 if (newstate != state)
1250 return -ESTALE;
864472e9
TM		 1251 }
1252 if (state->n_wronly != 0) {
b0ed9dbc 1253 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1254 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1255 if (ret != 0)
1256 return ret;
2ced46c2
TM		 1257 if (newstate != state)
1258 return -ESTALE;
864472e9
TM		 1259 }
1260 if (state->n_rdonly != 0) {
b0ed9dbc 1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1262 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1263 if (ret != 0)
1264 return ret;
2ced46c2
TM		 1265 if (newstate != state)
1266 return -ESTALE;
864472e9 1267 }
1ac7e2fd
TM		 1268 /*
1269 * We may have performed cached opens for all three recoveries.
1270 * Check if we need to update the current stateid.
1271 */
1272 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1273 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1274 write_seqlock(&state->seqlock);
1ac7e2fd 1275 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1276 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1277 write_sequnlock(&state->seqlock);
1ac7e2fd 1278 }
864472e9
TM		 1279 return 0;
1280}
1281
1da177e4
LT		 1282/*
1283 * OPEN_RECLAIM:
1284 * reclaim state on the server after a reboot.
1da177e4 1285 */
539cd03a 1286static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1287{
1ac7e2fd 1288 struct nfs_delegation *delegation;
864472e9 1289 struct nfs4_opendata *opendata;
dc0b027d 1290 fmode_t delegation_type = 0;
1da177e4
LT		 1291 int status;
1292
6f220ed5
TM		 1293 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1294 if (IS_ERR(opendata))
1295 return PTR_ERR(opendata);
864472e9
TM		 1296 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1297 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1298 rcu_read_lock();
1299 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1300 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1301 delegation_type = delegation->type;
1ac7e2fd 1302 rcu_read_unlock();
864472e9
TM		 1303 opendata->o_arg.u.delegation_type = delegation_type;
1304 status = nfs4_open_recover(opendata, state);
c6d00e63 1305 nfs4_opendata_put(opendata);
1da177e4
LT		 1306 return status;
1307}
1308
539cd03a 1309static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1310{
1311 struct nfs_server *server = NFS_SERVER(state->inode);
1312 struct nfs4_exception exception = { };
1313 int err;
1314 do {
539cd03a 1315 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1316 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1317 break;
1318 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1319 } while (exception.retry);
1320 return err;
1321}
1322
864472e9
TM		 1323static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1324{
1325 struct nfs_open_context *ctx;
1326 int ret;
1327
1328 ctx = nfs4_state_find_open_context(state);
1329 if (IS_ERR(ctx))
1330 return PTR_ERR(ctx);
539cd03a 1331 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1332 put_nfs_open_context(ctx);
1333 return ret;
1334}
1335
13437e12 1336static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1337{
e56e0b78 1338 struct nfs4_opendata *opendata;
864472e9 1339 int ret;
1da177e4 1340
6f220ed5
TM		 1341 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1342 if (IS_ERR(opendata))
1343 return PTR_ERR(opendata);
e56e0b78 1344 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1345 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1346 ret = nfs4_open_recover(opendata, state);
c6d00e63 1347 nfs4_opendata_put(opendata);
864472e9 1348 return ret;
1da177e4
LT		 1349}
1350
13437e12 1351int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1352{
1353 struct nfs4_exception exception = { };
539cd03a 1354 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1355 int err;
1356 do {
13437e12 1357 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1358 switch (err) {
1359 case 0:
965b5d67
TM		 1360 case -ENOENT:
1361 case -ESTALE:
1362 goto out;
bcfa49f6
RL		 1363 case -NFS4ERR_BADSESSION:
1364 case -NFS4ERR_BADSLOT:
1365 case -NFS4ERR_BAD_HIGH_SLOT:
1366 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1367 case -NFS4ERR_DEADSESSION:
37380e42 1368 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1369 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1370 err = -EAGAIN;
bcfa49f6 1371 goto out;
1da177e4
LT		 1372 case -NFS4ERR_STALE_CLIENTID:
1373 case -NFS4ERR_STALE_STATEID:
37380e42 1374 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1375 case -NFS4ERR_EXPIRED:
1376 /* Don't recall a delegation if it was lost */
0400a6b0 1377 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1378 err = -EAGAIN;
965b5d67 1379 goto out;
a1d0b5ee 1380 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1381 case -NFS4ERR_ADMIN_REVOKED:
1382 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1383 nfs_inode_find_state_and_recover(state->inode,
1384 stateid);
0400a6b0 1385 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1386 case -ENOMEM:
1387 err = 0;
1388 goto out;
1da177e4 1389 }
37380e42 1390 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1391 err = nfs4_handle_exception(server, err, &exception);
1392 } while (exception.retry);
965b5d67 1393out:
1da177e4
LT		 1394 return err;
1395}
1396
cdd4e68b
TM		 1397static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1398{
1399 struct nfs4_opendata *data = calldata;
1400
1401 data->rpc_status = task->tk_status;
26e976a8 1402 if (data->rpc_status == 0) {
f597c537 1403 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1404 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1405 renew_lease(data->o_res.server, data->timestamp);
3e309914 1406 data->rpc_done = 1;
26e976a8 1407 }
cdd4e68b
TM		 1408}
1409
1410static void nfs4_open_confirm_release(void *calldata)
1411{
1412 struct nfs4_opendata *data = calldata;
1413 struct nfs4_state *state = NULL;
1414
1415 /* If this request hasn't been cancelled, do nothing */
1416 if (data->cancelled == 0)
1417 goto out_free;
1418 /* In case of error, no cleanup! */
3e309914 1419 if (!data->rpc_done)
cdd4e68b 1420 goto out_free;
cdd4e68b 1421 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1422 if (!IS_ERR(state))
643168c2 1423 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1424out_free:
c6d00e63 1425 nfs4_opendata_put(data);
cdd4e68b
TM		 1426}
1427
1428static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1429 .rpc_call_done = nfs4_open_confirm_done,
1430 .rpc_release = nfs4_open_confirm_release,
1431};
1432
1433/*
1434 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1435 */
1436static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1437{
1438 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1439 struct rpc_task *task;
5138fde0
TM		 1440 struct rpc_message msg = {
1441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1442 .rpc_argp = &data->c_arg,
1443 .rpc_resp = &data->c_res,
1444 .rpc_cred = data->owner->so_cred,
1445 };
c970aa85
TM		 1446 struct rpc_task_setup task_setup_data = {
1447 .rpc_client = server->client,
5138fde0 1448 .rpc_message = &msg,
c970aa85
TM		 1449 .callback_ops = &nfs4_open_confirm_ops,
1450 .callback_data = data,
101070ca 1451 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1452 .flags = RPC_TASK_ASYNC,
1453 };
1da177e4
LT		 1454 int status;
1455
c6d00e63 1456 kref_get(&data->kref);
3e309914
TM		 1457 data->rpc_done = 0;
1458 data->rpc_status = 0;
5138fde0 1459 data->timestamp = jiffies;
c970aa85 1460 task = rpc_run_task(&task_setup_data);
7a1218a2 1461 if (IS_ERR(task))
cdd4e68b 1462 return PTR_ERR(task);
cdd4e68b
TM		 1463 status = nfs4_wait_for_completion_rpc_task(task);
1464 if (status != 0) {
1465 data->cancelled = 1;
1466 smp_wmb();
1467 } else
1468 status = data->rpc_status;
e6b3c4db 1469 rpc_put_task(task);
1da177e4
LT		 1470 return status;
1471}
1472
24ac23ab 1473static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1474{
24ac23ab
TM		 1475 struct nfs4_opendata *data = calldata;
1476 struct nfs4_state_owner *sp = data->owner;
5138fde0 1477
24ac23ab 1478 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1479 goto out_wait;
aac00a8d
TM		 1480 /*
1481 * Check if we still need to send an OPEN call, or if we can use
1482 * a delegation instead.
1483 */
1484 if (data->state != NULL) {
1485 struct nfs_delegation *delegation;
1486
dc0b027d 1487 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1488 goto out_no_action;
aac00a8d
TM		 1489 rcu_read_lock();
1490 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1491 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1492 can_open_delegated(delegation, data->o_arg.fmode))
1493 goto unlock_no_action;
aac00a8d
TM		 1494 rcu_read_unlock();
1495 }
95b72eb0 1496 /* Update client id. */
1f0e890d 1497 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1498 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1499 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1500 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1501 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1502 }
26e976a8 1503 data->timestamp = jiffies;
035168ab 1504 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1505 &data->o_arg.seq_args,
2240a9e2
TM		 1506 &data->o_res.seq_res,
1507 task) != 0)
1508 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1509 return;
652f89f6
TM		 1510unlock_no_action:
1511 rcu_read_unlock();
6ee41268
TM		 1512out_no_action:
1513 task->tk_action = NULL;
c8da19b9 1514out_wait:
b75ad4cd 1515 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1516}
1517
24ac23ab
TM		 1518static void nfs4_open_done(struct rpc_task *task, void *calldata)
1519{
1520 struct nfs4_opendata *data = calldata;
1da177e4 1521
24ac23ab 1522 data->rpc_status = task->tk_status;
d898528c 1523
14516c3a
TM		 1524 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1525 return;
d898528c 1526
24ac23ab 1527 if (task->tk_status == 0) {
807d66d8
TM		 1528 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1530 case S_IFREG:
1531 break;
1532 case S_IFLNK:
24ac23ab 1533 data->rpc_status = -ELOOP;
6f926b5b
TM		 1534 break;
1535 case S_IFDIR:
24ac23ab 1536 data->rpc_status = -EISDIR;
6f926b5b
TM		 1537 break;
1538 default:
24ac23ab 1539 data->rpc_status = -ENOTDIR;
807d66d8 1540 }
6f926b5b 1541 }
26e976a8 1542 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1543 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1544 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1545 }
3e309914 1546 data->rpc_done = 1;
24ac23ab 1547}
6f926b5b 1548
24ac23ab
TM		 1549static void nfs4_open_release(void *calldata)
1550{
1551 struct nfs4_opendata *data = calldata;
1552 struct nfs4_state *state = NULL;
1553
1554 /* If this request hasn't been cancelled, do nothing */
1555 if (data->cancelled == 0)
1556 goto out_free;
1557 /* In case of error, no cleanup! */
3e309914 1558 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1559 goto out_free;
1560 /* In case we need an open_confirm, no cleanup! */
1561 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1562 goto out_free;
24ac23ab 1563 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1564 if (!IS_ERR(state))
643168c2 1565 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1566out_free:
c6d00e63 1567 nfs4_opendata_put(data);
24ac23ab
TM		 1568}
1569
1570static const struct rpc_call_ops nfs4_open_ops = {
1571 .rpc_call_prepare = nfs4_open_prepare,
1572 .rpc_call_done = nfs4_open_done,
1573 .rpc_release = nfs4_open_release,
1574};
1575
b257957e 1576static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1577{
1578 struct inode *dir = data->dir->d_inode;
1579 struct nfs_server *server = NFS_SERVER(dir);
1580 struct nfs_openargs *o_arg = &data->o_arg;
1581 struct nfs_openres *o_res = &data->o_res;
1582 struct rpc_task *task;
5138fde0
TM		 1583 struct rpc_message msg = {
1584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1585 .rpc_argp = o_arg,
1586 .rpc_resp = o_res,
1587 .rpc_cred = data->owner->so_cred,
1588 };
c970aa85
TM		 1589 struct rpc_task_setup task_setup_data = {
1590 .rpc_client = server->client,
5138fde0 1591 .rpc_message = &msg,
c970aa85
TM		 1592 .callback_ops = &nfs4_open_ops,
1593 .callback_data = data,
101070ca 1594 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1595 .flags = RPC_TASK_ASYNC,
1596 };
24ac23ab
TM		 1597 int status;
1598
9d12b216 1599 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1600 kref_get(&data->kref);
3e309914
TM		 1601 data->rpc_done = 0;
1602 data->rpc_status = 0;
2ced46c2 1603 data->cancelled = 0;
b257957e 1604 if (isrecover)
8fe72bac 1605 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1606 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1607 if (IS_ERR(task))
1608 return PTR_ERR(task);
1609 status = nfs4_wait_for_completion_rpc_task(task);
1610 if (status != 0) {
1611 data->cancelled = 1;
1612 smp_wmb();
1613 } else
1614 status = data->rpc_status;
1615 rpc_put_task(task);
1616
1617 return status;
1618}
1619
1620static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1621{
1622 struct inode *dir = data->dir->d_inode;
1623 struct nfs_openres *o_res = &data->o_res;
1624 int status;
1625
1626 status = nfs4_run_open_task(data, 1);
1627 if (status != 0 || !data->rpc_done)
1628 return status;
1629
6926afd1
TM		 1630 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1631
b257957e
AB		 1632 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1633 status = _nfs4_proc_open_confirm(data);
1634 if (status != 0)
1635 return status;
1636 }
1637
1638 return status;
1639}
1640
6168f62c
WAA		 1641static int nfs4_opendata_access(struct rpc_cred *cred,
1642 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1643 struct nfs4_state *state, fmode_t fmode,
1644 int openflags)
6168f62c
WAA		 1645{
1646 struct nfs_access_entry cache;
1647 u32 mask;
1648
1649 /* access call failed or for some reason the server doesn't
1650 * support any access modes -- defer access call until later */
1651 if (opendata->o_res.access_supported == 0)
1652 return 0;
1653
1654 mask = 0;
bbd3a8ee 1655 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1656 * write mode bits, but POSIX allows the creating process to write.
1657 * use openflags to check for exec, because fmode won't
1658 * always have FMODE_EXEC set when file open for exec. */
1659 if (openflags & __FMODE_EXEC) {
1660 /* ONLY check for exec rights */
1661 mask = MAY_EXEC;
1662 } else if (fmode & FMODE_READ)
1663 mask = MAY_READ;
6168f62c
WAA		 1664
1665 cache.cred = cred;
1666 cache.jiffies = jiffies;
1667 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1668 nfs_access_add_cache(state->inode, &cache);
1669
bbd3a8ee 1670 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1671 return 0;
1672
1673 /* even though OPEN succeeded, access is denied. Close the file */
1674 nfs4_close_state(state, fmode);
998f40b5 1675 return -EACCES;
6168f62c
WAA		 1676}
1677
b257957e
AB		 1678/*
1679 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1680 */
1681static int _nfs4_proc_open(struct nfs4_opendata *data)
1682{
1683 struct inode *dir = data->dir->d_inode;
1684 struct nfs_server *server = NFS_SERVER(dir);
1685 struct nfs_openargs *o_arg = &data->o_arg;
1686 struct nfs_openres *o_res = &data->o_res;
1687 int status;
1688
1689 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1690 if (!data->rpc_done)
1691 return status;
1692 if (status != 0) {
1693 if (status == -NFS4ERR_BADNAME &&
1694 !(o_arg->open_flags & O_CREAT))
1695 return -ENOENT;
24ac23ab 1696 return status;
08ef7bd3 1697 }
24ac23ab 1698
6926afd1
TM		 1699 nfs_fattr_map_and_free_names(server, &data->f_attr);
1700
90ff0c54 1701 if (o_arg->open_flags & O_CREAT)
56ae19f3 1702 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1703 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1704 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1705 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1706 status = _nfs4_proc_open_confirm(data);
1da177e4 1707 if (status != 0)
24ac23ab 1708 return status;
1da177e4
LT		 1709 }
1710 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1711 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1712 return 0;
1da177e4
LT		 1713}
1714
d83217c1
AA		 1715static int nfs4_recover_expired_lease(struct nfs_server *server)
1716{
1717 return nfs4_client_recover_expired_lease(server->nfs_client);
1718}
1719
1da177e4
LT		 1720/*
1721 * OPEN_EXPIRED:
1722 * reclaim state on the server after a network partition.
1723 * Assumes caller holds the appropriate lock
1724 */
539cd03a 1725static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1726{
e56e0b78 1727 struct nfs4_opendata *opendata;
864472e9 1728 int ret;
1da177e4 1729
6f220ed5
TM		 1730 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1731 if (IS_ERR(opendata))
1732 return PTR_ERR(opendata);
864472e9 1733 ret = nfs4_open_recover(opendata, state);
35d05778 1734 if (ret == -ESTALE)
3d4ff43d 1735 d_drop(ctx->dentry);
c6d00e63 1736 nfs4_opendata_put(opendata);
864472e9 1737 return ret;
1da177e4
LT		 1738}
1739
a9ed2e25 1740static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1741{
539cd03a 1742 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1743 struct nfs4_exception exception = { };
1744 int err;
1745
1746 do {
539cd03a 1747 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1748 switch (err) {
1749 default:
1750 goto out;
1751 case -NFS4ERR_GRACE:
1752 case -NFS4ERR_DELAY:
1753 nfs4_handle_exception(server, err, &exception);
1754 err = 0;
1755 }
202b50dc 1756 } while (exception.retry);
a9ed2e25 1757out:
202b50dc
TM		 1758 return err;
1759}
1760
1da177e4
LT		 1761static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1762{
1da177e4 1763 struct nfs_open_context *ctx;
864472e9 1764 int ret;
1da177e4 1765
864472e9
TM		 1766 ctx = nfs4_state_find_open_context(state);
1767 if (IS_ERR(ctx))
1768 return PTR_ERR(ctx);
539cd03a 1769 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1770 put_nfs_open_context(ctx);
1771 return ret;
1da177e4
LT		 1772}
1773
f062eb6c 1774#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1775static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1776{
f062eb6c 1777 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1778 nfs4_stateid *stateid = &state->stateid;
1779 int status;
1780
1781 /* If a state reset has been done, test_stateid is unneeded */
1782 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1783 return;
1784
1785 status = nfs41_test_stateid(server, stateid);
1786 if (status != NFS_OK) {
1787 /* Free the stateid unless the server explicitly
1788 * informs us the stateid is unrecognized. */
1789 if (status != -NFS4ERR_BAD_STATEID)
1790 nfs41_free_stateid(server, stateid);
6938867e 1791 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1792
6938867e
BS		 1793 write_seqlock(&state->seqlock);
1794 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1795 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1796 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1797 }
1798}
1799
1800/**
1801 * nfs41_check_open_stateid - possibly free an open stateid
1802 *
1803 * @state: NFSv4 state for an inode
1804 *
1805 * Returns NFS_OK if recovery for this stateid is now finished.
1806 * Otherwise a negative NFS4ERR value is returned.
1807 */
1808static int nfs41_check_open_stateid(struct nfs4_state *state)
1809{
1810 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1811 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1812 int status;
1813
1814 /* If a state reset has been done, test_stateid is unneeded */
1815 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1816 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1817 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1818 return -NFS4ERR_BAD_STATEID;
1819
1820 status = nfs41_test_stateid(server, stateid);
1821 if (status != NFS_OK) {
1822 /* Free the stateid unless the server explicitly
1823 * informs us the stateid is unrecognized. */
1824 if (status != -NFS4ERR_BAD_STATEID)
1825 nfs41_free_stateid(server, stateid);
1826
1827 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1828 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1829 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1830 }
1831 return status;
1832}
1833
1834static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1835{
eb64cf96 1836 int status;
b01dd1d8 1837
3e60ffdd
CL		 1838 nfs41_clear_delegation_stateid(state);
1839 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1840 if (status != NFS_OK)
1841 status = nfs4_open_expired(sp, state);
1842 return status;
f062eb6c
BS		 1843}
1844#endif
1845
aa53ed54
JL		 1846/*
1847 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1848 * fields corresponding to attributes that were used to store the verifier.
1849 * Make sure we clobber those fields in the later setattr call
1850 */
1851static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1852{
1853 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1854 !(sattr->ia_valid & ATTR_ATIME_SET))
1855 sattr->ia_valid |= ATTR_ATIME;
1856
1857 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1858 !(sattr->ia_valid & ATTR_MTIME_SET))
1859 sattr->ia_valid |= ATTR_MTIME;
1860}
1861
c21443c2
TM		 1862static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1863 fmode_t fmode,
1864 int flags,
1865 struct nfs4_state **res)
1866{
1867 struct nfs4_state_owner *sp = opendata->owner;
1868 struct nfs_server *server = sp->so_server;
1869 struct nfs4_state *state;
1870 unsigned int seq;
1871 int ret;
1872
1873 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1874
1875 ret = _nfs4_proc_open(opendata);
1876 if (ret != 0)
1877 goto out;
1878
1879 state = nfs4_opendata_to_nfs4_state(opendata);
1880 ret = PTR_ERR(state);
1881 if (IS_ERR(state))
1882 goto out;
1883 if (server->caps & NFS_CAP_POSIX_LOCK)
1884 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1885
1886 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1887 if (ret != 0)
1888 goto out;
1889
1890 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1891 nfs4_schedule_stateid_recovery(server, state);
1892 nfs4_wait_clnt_recover(server->nfs_client);
1893 }
1894 *res = state;
1895out:
1896 return ret;
1897}
1898
1da177e4 1899/*
24ac23ab 1900 * Returns a referenced nfs4_state
1da177e4 1901 */
82be417a
AA		 1902static int _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_state **res,
1909 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1910{
1911 struct nfs4_state_owner *sp;
1912 struct nfs4_state *state = NULL;
1913 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1914 struct nfs4_opendata *opendata;
aac00a8d 1915 int status;
1da177e4
LT		 1916
1917 /* Protect against reboot recovery conflicts */
1da177e4 1918 status = -ENOMEM;
d1e284d5
TM		 1919 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1920 if (sp == NULL) {
1da177e4
LT		 1921 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1922 goto out_err;
1923 }
58d9714a
TM		 1924 status = nfs4_recover_expired_lease(server);
1925 if (status != 0)
b4454fe1 1926 goto err_put_state_owner;
82a2c1b7
AV		 1927 if (dentry->d_inode != NULL)
1928 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1929 status = -ENOMEM;
82a2c1b7 1930 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1931 if (opendata == NULL)
95d35cb4 1932 goto err_put_state_owner;
1da177e4 1933
82be417a
AA		 1934 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1935 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1936 if (!opendata->f_attr.mdsthreshold)
1937 goto err_opendata_put;
1549210f 1938 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1939 }
82a2c1b7
AV		 1940 if (dentry->d_inode != NULL)
1941 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1942
c21443c2 1943 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1944 if (status != 0)
1945 goto err_opendata_put;
1946
0ab64e0e
TM		 1947 if (opendata->o_arg.open_flags & O_EXCL) {
1948 nfs4_exclusive_attrset(opendata, sattr);
1949
1950 nfs_fattr_init(opendata->o_res.f_attr);
1951 status = nfs4_do_setattr(state->inode, cred,
1952 opendata->o_res.f_attr, sattr,
1953 state);
1954 if (status == 0)
1955 nfs_setattr_update_inode(state->inode, sattr);
1956 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1957 }
82be417a
AA		 1958
1959 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1960 *ctx_th = opendata->f_attr.mdsthreshold;
1961 else
1962 kfree(opendata->f_attr.mdsthreshold);
1963 opendata->f_attr.mdsthreshold = NULL;
1964
c6d00e63 1965 nfs4_opendata_put(opendata);
1da177e4 1966 nfs4_put_state_owner(sp);
1da177e4
LT		 1967 *res = state;
1968 return 0;
c6d00e63 1969err_opendata_put:
82be417a 1970 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1971 nfs4_opendata_put(opendata);
e56e0b78
TM		 1972err_put_state_owner:
1973 nfs4_put_state_owner(sp);
1da177e4 1974out_err:
1da177e4
LT		 1975 *res = NULL;
1976 return status;
1977}
1978
1979
82be417a
AA		 1980static struct nfs4_state *nfs4_do_open(struct inode *dir,
1981 struct dentry *dentry,
1982 fmode_t fmode,
1983 int flags,
1984 struct iattr *sattr,
1985 struct rpc_cred *cred,
1986 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1987{
1988 struct nfs4_exception exception = { };
1989 struct nfs4_state *res;
1990 int status;
1991
6168f62c 1992 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1993 do {
82be417a
AA		 1994 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1995 &res, ctx_th);
1da177e4
LT		 1996 if (status == 0)
1997 break;
1998 /* NOTE: BAD_SEQID means the server and client disagree about the
1999 * book-keeping w.r.t. state-changing operations
2000 * (OPEN/CLOSE/LOCK/LOCKU...)
2001 * It is actually a sign of a bug on the client or on the server.
2002 *
2003 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2004 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2005 * have unhashed the old state_owner for us, and that we can
2006 * therefore safely retry using a new one. We should still warn
2007 * the user though...
2008 */
2009 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2010 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2011 " returned a bad sequence-id error!\n",
2012 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2013 exception.retry = 1;
2014 continue;
2015 }
550f5747
TM		 2016 /*
2017 * BAD_STATEID on OPEN means that the server cancelled our
2018 * state before it received the OPEN_CONFIRM.
2019 * Recover by retrying the request as per the discussion
2020 * on Page 181 of RFC3530.
2021 */
2022 if (status == -NFS4ERR_BAD_STATEID) {
2023 exception.retry = 1;
2024 continue;
2025 }
aac00a8d
TM		 2026 if (status == -EAGAIN) {
2027 /* We must have found a delegation */
2028 exception.retry = 1;
2029 continue;
2030 }
1da177e4
LT		 2031 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2032 status, &exception));
2033 } while (exception.retry);
2034 return res;
2035}
2036
659bfcd6
TM		 2037static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2038 struct nfs_fattr *fattr, struct iattr *sattr,
2039 struct nfs4_state *state)
1da177e4 2040{
3e4f6290 2041 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2042 struct nfs_setattrargs arg = {
3e4f6290 2043 .fh = NFS_FH(inode),
1da177e4
LT		 2044 .iap = sattr,
2045 .server = server,
2046 .bitmask = server->attr_bitmask,
2047 };
2048 struct nfs_setattrres res = {
2049 .fattr = fattr,
2050 .server = server,
2051 };
2052 struct rpc_message msg = {
659bfcd6
TM		 2053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2054 .rpc_argp = &arg,
2055 .rpc_resp = &res,
2056 .rpc_cred = cred,
1da177e4 2057 };
26e976a8 2058 unsigned long timestamp = jiffies;
65e4308d 2059 int status;
1da177e4 2060
0e574af1 2061 nfs_fattr_init(fattr);
1da177e4 2062
5d422301 2063 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2064 struct nfs_lockowner lockowner = {
2065 .l_owner = current->files,
2066 .l_pid = current->tgid,
2067 };
4fc8796d 2068 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2069 &lockowner);
4fc8796d
TM		 2070 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2071 FMODE_WRITE)) {
3e4f6290 2072 /* Use that stateid */
08e9eac4 2073 } else
f597c537 2074 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2075
7c513058 2076 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2077 if (status == 0 && state != NULL)
2078 renew_lease(server, timestamp);
65e4308d 2079 return status;
1da177e4
LT		 2080}
2081
659bfcd6
TM		 2082static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2083 struct nfs_fattr *fattr, struct iattr *sattr,
2084 struct nfs4_state *state)
1da177e4 2085{
3e4f6290 2086 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2087 struct nfs4_exception exception = {
2088 .state = state,
3114ea7a 2089 .inode = inode,
a1d0b5ee 2090 };
1da177e4
LT		 2091 int err;
2092 do {
451146be
TM		 2093 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2094 switch (err) {
2095 case -NFS4ERR_OPENMODE:
2096 if (state && !(state->state & FMODE_WRITE)) {
2097 err = -EBADF;
2098 if (sattr->ia_valid & ATTR_OPEN)
2099 err = -EACCES;
2100 goto out;
2101 }
2102 }
2103 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2104 } while (exception.retry);
451146be 2105out:
1da177e4
LT		 2106 return err;
2107}
2108
2109struct nfs4_closedata {
2110 struct inode *inode;
2111 struct nfs4_state *state;
2112 struct nfs_closeargs arg;
2113 struct nfs_closeres res;
516a6af6 2114 struct nfs_fattr fattr;
26e976a8 2115 unsigned long timestamp;
f7e8917a
FI		 2116 bool roc;
2117 u32 roc_barrier;
1da177e4
LT		 2118};
2119
963d8fe5 2120static void nfs4_free_closedata(void *data)
9512135d 2121{
963d8fe5
TM		 2122 struct nfs4_closedata *calldata = data;
2123 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2124 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2125
f7e8917a
FI		 2126 if (calldata->roc)
2127 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2128 nfs4_put_open_state(calldata->state);
2129 nfs_free_seqid(calldata->arg.seqid);
9512135d 2130 nfs4_put_state_owner(sp);
322b2b90 2131 nfs_sb_deactive(sb);
9512135d
TM		 2132 kfree(calldata);
2133}
2134
88069f77
TM		 2135static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2136 fmode_t fmode)
2137{
2138 spin_lock(&state->owner->so_lock);
2139 if (!(fmode & FMODE_READ))
2140 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2141 if (!(fmode & FMODE_WRITE))
2142 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2143 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2144 spin_unlock(&state->owner->so_lock);
2145}
2146
963d8fe5 2147static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2148{
963d8fe5 2149 struct nfs4_closedata *calldata = data;
1da177e4 2150 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2151 struct nfs_server *server = NFS_SERVER(calldata->inode);
2152
a3ca5651 2153 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2154 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2155 return;
1da177e4
LT		 2156 /* hmm. we are done with the inode, and in the process of freeing
2157 * the state_owner. we keep this around to process errors
2158 */
1da177e4
LT		 2159 switch (task->tk_status) {
2160 case 0:
f7e8917a
FI		 2161 if (calldata->roc)
2162 pnfs_roc_set_barrier(state->inode,
2163 calldata->roc_barrier);
45328c35 2164 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2165 renew_lease(server, calldata->timestamp);
88069f77
TM		 2166 nfs4_close_clear_stateid_flags(state,
2167 calldata->arg.fmode);
1da177e4
LT		 2168 break;
2169 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2170 case -NFS4ERR_OLD_STATEID:
2171 case -NFS4ERR_BAD_STATEID:
1da177e4 2172 case -NFS4ERR_EXPIRED:
dc0b027d 2173 if (calldata->arg.fmode == 0)
9e33bed5 2174 break;
1da177e4 2175 default:
72211dbe
TM		 2176 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2177 rpc_restart_call_prepare(task);
1da177e4 2178 }
72211dbe 2179 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2180 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2181 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2182}
2183
4ce70ada 2184static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2185{
4ce70ada 2186 struct nfs4_closedata *calldata = data;
9512135d 2187 struct nfs4_state *state = calldata->state;
7fdab069 2188 struct inode *inode = calldata->inode;
88069f77 2189 int call_close = 0;
9512135d 2190
a3ca5651 2191 dprintk("%s: begin!\n", __func__);
963d8fe5 2192 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2193 goto out_wait;
003707c7 2194
88069f77
TM		 2195 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2196 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2197 spin_lock(&state->owner->so_lock);
003707c7 2198 /* Calculate the change in open mode */
e7616923 2199 if (state->n_rdwr == 0) {
003707c7 2200 if (state->n_rdonly == 0) {
88069f77
TM		 2201 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2202 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2203 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2204 }
2205 if (state->n_wronly == 0) {
88069f77
TM		 2206 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2207 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2208 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2209 }
e7616923 2210 }
5d422301
TM		 2211 if (!nfs4_valid_open_stateid(state))
2212 call_close = 0;
4cecb76f 2213 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2214
2215 if (!call_close) {
963d8fe5 2216 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2217 goto out_no_action;
9512135d 2218 }
88069f77 2219
f7e8917a 2220 if (calldata->arg.fmode == 0) {
88069f77 2221 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2222 if (calldata->roc &&
7fdab069 2223 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2224 goto out_wait;
f7e8917a 2225 }
88069f77 2226
516a6af6 2227 nfs_fattr_init(calldata->res.fattr);
26e976a8 2228 calldata->timestamp = jiffies;
7fdab069 2229 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2230 &calldata->arg.seq_args,
2231 &calldata->res.seq_res,
2240a9e2
TM		 2232 task) != 0)
2233 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2234 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2235 return;
2236out_no_action:
2237 task->tk_action = NULL;
2238out_wait:
2239 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2240}
2241
963d8fe5 2242static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2243 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2244 .rpc_call_done = nfs4_close_done,
2245 .rpc_release = nfs4_free_closedata,
2246};
2247
1da177e4
LT		 2248/*
2249 * It is possible for data to be read/written from a mem-mapped file
2250 * after the sys_close call (which hits the vfs layer as a flush).
2251 * This means that we can't safely call nfsv4 close on a file until
2252 * the inode is cleared. This in turn means that we are not good
2253 * NFSv4 citizens - we do not indicate to the server to update the file's
2254 * share state even when we are done with one of the three share
2255 * stateid's in the inode.
2256 *
2257 * NOTE: Caller must be holding the sp->so_owner semaphore!
2258 */
1f7977c1 2259int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2260{
4a35bd41 2261 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2262 struct nfs4_closedata *calldata;
b39e625b
TM		 2263 struct nfs4_state_owner *sp = state->owner;
2264 struct rpc_task *task;
5138fde0
TM		 2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2267 .rpc_cred = state->owner->so_cred,
2268 };
c970aa85
TM		 2269 struct rpc_task_setup task_setup_data = {
2270 .rpc_client = server->client,
5138fde0 2271 .rpc_message = &msg,
c970aa85 2272 .callback_ops = &nfs4_close_ops,
101070ca 2273 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2274 .flags = RPC_TASK_ASYNC,
2275 };
9512135d 2276 int status = -ENOMEM;
1da177e4 2277
8535b2be 2278 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2279 if (calldata == NULL)
9512135d 2280 goto out;
9d12b216 2281 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2282 calldata->inode = state->inode;
1da177e4 2283 calldata->state = state;
4a35bd41 2284 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2285 calldata->arg.stateid = &state->open_stateid;
1da177e4 2286 /* Serialization for the sequence id */
8535b2be 2287 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2288 if (calldata->arg.seqid == NULL)
2289 goto out_free_calldata;
dc0b027d 2290 calldata->arg.fmode = 0;
a65318bf 2291 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2292 calldata->res.fattr = &calldata->fattr;
c1d51931 2293 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2294 calldata->res.server = server;
1f7977c1 2295 calldata->roc = pnfs_roc(state->inode);
643168c2 2296 nfs_sb_active(calldata->inode->i_sb);
9512135d 2297
1174dd1f
TM		 2298 msg.rpc_argp = &calldata->arg;
2299 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2300 task_setup_data.callback_data = calldata;
2301 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2302 if (IS_ERR(task))
2303 return PTR_ERR(task);
a49c3c77
TM		 2304 status = 0;
2305 if (wait)
2306 status = rpc_wait_for_completion_task(task);
b39e625b 2307 rpc_put_task(task);
a49c3c77 2308 return status;
9512135d
TM		 2309out_free_calldata:
2310 kfree(calldata);
2311out:
b39e625b
TM		 2312 nfs4_put_open_state(state);
2313 nfs4_put_state_owner(sp);
9512135d 2314 return status;
1da177e4
LT		 2315}
2316
2b484297 2317static struct inode *
cd9a1c0e 2318nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2319{
1da177e4 2320 struct nfs4_state *state;
1da177e4 2321
565277f6 2322 /* Protect against concurrent sillydeletes */
82be417a
AA		 2323 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2324 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2325 if (IS_ERR(state))
2326 return ERR_CAST(state);
cd9a1c0e 2327 ctx->state = state;
f46e0bd3 2328 return igrab(state->inode);
1da177e4
LT		 2329}
2330
1185a552 2331static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2332{
2333 if (ctx->state == NULL)
2334 return;
2335 if (is_sync)
643168c2 2336 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2337 else
643168c2 2338 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2339}
1da177e4
LT		 2340
2341static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2342{
43652ad5
BH		 2343 struct nfs4_server_caps_arg args = {
2344 .fhandle = fhandle,
2345 };
1da177e4
LT		 2346 struct nfs4_server_caps_res res = {};
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2349 .rpc_argp = &args,
1da177e4
LT		 2350 .rpc_resp = &res,
2351 };
2352 int status;
2353
7c513058 2354 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2355 if (status == 0) {
2356 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2357 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2358 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2359 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2360 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2361 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2362 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2363 server->caps |= NFS_CAP_ACLS;
2364 if (res.has_links != 0)
2365 server->caps |= NFS_CAP_HARDLINKS;
2366 if (res.has_symlinks != 0)
2367 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2368 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2369 server->caps |= NFS_CAP_FILEID;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2371 server->caps |= NFS_CAP_MODE;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2373 server->caps |= NFS_CAP_NLINK;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2375 server->caps |= NFS_CAP_OWNER;
2376 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2377 server->caps |= NFS_CAP_OWNER_GROUP;
2378 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2379 server->caps |= NFS_CAP_ATIME;
2380 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2381 server->caps |= NFS_CAP_CTIME;
2382 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2383 server->caps |= NFS_CAP_MTIME;
2384
a65318bf
TM		 2385 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2386 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2387 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2388 server->acl_bitmask = res.acl_bitmask;
264e6351 2389 server->fh_expire_type = res.fh_expire_type;
1da177e4 2390 }
cccef3b9 2391
1da177e4
LT		 2392 return status;
2393}
2394
55a97593 2395int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2396{
2397 struct nfs4_exception exception = { };
2398 int err;
2399 do {
2400 err = nfs4_handle_exception(server,
2401 _nfs4_server_capabilities(server, fhandle),
2402 &exception);
2403 } while (exception.retry);
2404 return err;
2405}
2406
2407static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2408 struct nfs_fsinfo *info)
2409{
1da177e4
LT		 2410 struct nfs4_lookup_root_arg args = {
2411 .bitmask = nfs4_fattr_bitmap,
2412 };
2413 struct nfs4_lookup_res res = {
2414 .server = server,
0e574af1 2415 .fattr = info->fattr,
1da177e4
LT		 2416 .fh = fhandle,
2417 };
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2420 .rpc_argp = &args,
2421 .rpc_resp = &res,
2422 };
008f55d0 2423
0e574af1 2424 nfs_fattr_init(info->fattr);
7c513058 2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2426}
2427
2428static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2429 struct nfs_fsinfo *info)
2430{
2431 struct nfs4_exception exception = { };
2432 int err;
2433 do {
fb8a5ba8
BS		 2434 err = _nfs4_lookup_root(server, fhandle, info);
2435 switch (err) {
2436 case 0:
2437 case -NFS4ERR_WRONGSEC:
05e9cfb4 2438 goto out;
fb8a5ba8
BS		 2439 default:
2440 err = nfs4_handle_exception(server, err, &exception);
2441 }
1da177e4 2442 } while (exception.retry);
05e9cfb4 2443out:
1da177e4
LT		 2444 return err;
2445}
2446
8f70e95f
BS		 2447static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2448 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2449{
2450 struct rpc_auth *auth;
2451 int ret;
2452
2453 auth = rpcauth_create(flavor, server->client);
e8d920c5 2454 if (IS_ERR(auth)) {
8f70e95f
BS		 2455 ret = -EIO;
2456 goto out;
2457 }
2458 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2459out:
2460 return ret;
2461}
2462
801a16dc 2463static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2464 struct nfs_fsinfo *info)
1da177e4 2465{
8f70e95f 2466 int i, len, status = 0;
0fabee24 2467 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2468
6a1a1e34 2469 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2470 if (len < 0)
2471 return len;
8f70e95f
BS		 2472
2473 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2474 /* AUTH_UNIX is the default flavor if none was specified,
2475 * thus has already been tried. */
2476 if (flav_array[i] == RPC_AUTH_UNIX)
2477 continue;
2478
8f70e95f 2479 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2480 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2481 continue;
2482 break;
8f70e95f 2483 }
fb8a5ba8
BS		 2484 /*
2485 * -EACCESS could mean that the user doesn't have correct permissions
2486 * to access the mount. It could also mean that we tried to mount
2487 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2488 * existing mount programs don't handle -EACCES very well so it should
2489 * be mapped to -EPERM instead.
2490 */
2491 if (status == -EACCES)
2492 status = -EPERM;
801a16dc
BS		 2493 return status;
2494}
2495
2496/*
2497 * get the file handle for the "/" directory on the server
2498 */
3028eb2b
BS		 2499int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2500 struct nfs_fsinfo *info)
801a16dc 2501{
fca78d6d 2502 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2503 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2504 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2505 /*
2506 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2507 * by nfs4_map_errors() as this function exits.
2508 */
fca78d6d 2509 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2510 if (status == 0)
2511 status = nfs4_server_capabilities(server, fhandle);
2512 if (status == 0)
2513 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2514 return nfs4_map_errors(status);
1da177e4
LT		 2515}
2516
bae36241
BS		 2517static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2518 struct nfs_fsinfo *info)
2519{
2520 int error;
2521 struct nfs_fattr *fattr = info->fattr;
2522
2523 error = nfs4_server_capabilities(server, mntfh);
2524 if (error < 0) {
2525 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2526 return error;
2527 }
2528
2529 error = nfs4_proc_getattr(server, mntfh, fattr);
2530 if (error < 0) {
2531 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2532 return error;
2533 }
2534
2535 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2536 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2537 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2538
2539 return error;
2540}
2541
6b97fd3d
MN		 2542/*
2543 * Get locations and (maybe) other attributes of a referral.
2544 * Note that we'll actually follow the referral later when
2545 * we detect fsid mismatch in inode revalidation
2546 */
f05d147f
BS		 2547static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2548 const struct qstr *name, struct nfs_fattr *fattr,
2549 struct nfs_fh *fhandle)
6b97fd3d
MN		 2550{
2551 int status = -ENOMEM;
2552 struct page *page = NULL;
2553 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2554
2555 page = alloc_page(GFP_KERNEL);
2556 if (page == NULL)
2557 goto out;
2558 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2559 if (locations == NULL)
2560 goto out;
2561
f05d147f 2562 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2563 if (status != 0)
2564 goto out;
2565 /* Make sure server returned a different fsid for the referral */
2566 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2567 dprintk("%s: server did not return a different fsid for"
2568 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2569 status = -EIO;
2570 goto out;
2571 }
533eb461
AA		 2572 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2573 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2574
533eb461 2575 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2576 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2577 memset(fhandle, 0, sizeof(struct nfs_fh));
2578out:
2579 if (page)
2580 __free_page(page);
5d7ca35a 2581 kfree(locations);
6b97fd3d
MN		 2582 return status;
2583}
2584
1da177e4
LT		 2585static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2586{
2587 struct nfs4_getattr_arg args = {
2588 .fh = fhandle,
2589 .bitmask = server->attr_bitmask,
2590 };
2591 struct nfs4_getattr_res res = {
2592 .fattr = fattr,
2593 .server = server,
2594 };
2595 struct rpc_message msg = {
2596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2597 .rpc_argp = &args,
2598 .rpc_resp = &res,
2599 };
2600
0e574af1 2601 nfs_fattr_init(fattr);
7c513058 2602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2603}
2604
2605static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2606{
2607 struct nfs4_exception exception = { };
2608 int err;
2609 do {
2610 err = nfs4_handle_exception(server,
2611 _nfs4_proc_getattr(server, fhandle, fattr),
2612 &exception);
2613 } while (exception.retry);
2614 return err;
2615}
2616
2617/*
2618 * The file is not closed if it is opened due to the a request to change
2619 * the size of the file. The open call will not be needed once the
2620 * VFS layer lookup-intents are implemented.
2621 *
2622 * Close is called when the inode is destroyed.
2623 * If we haven't opened the file for O_WRONLY, we
2624 * need to in the size_change case to obtain a stateid.
2625 *
2626 * Got race?
2627 * Because OPEN is always done by name in nfsv4, it is
2628 * possible that we opened a different file by the same
2629 * name. We can recognize this race condition, but we
2630 * can't do anything about it besides returning an error.
2631 *
2632 * This will be fixed with VFS changes (lookup-intent).
2633 */
2634static int
2635nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2636 struct iattr *sattr)
2637{
08e9eac4 2638 struct inode *inode = dentry->d_inode;
659bfcd6 2639 struct rpc_cred *cred = NULL;
d530838b 2640 struct nfs4_state *state = NULL;
1da177e4
LT		 2641 int status;
2642
8a1636c4 2643 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2644 pnfs_commit_and_return_layout(inode);
8a1636c4 2645
0e574af1 2646 nfs_fattr_init(fattr);
1da177e4 2647
2669940d
AA		 2648 /* Deal with open(O_TRUNC) */
2649 if (sattr->ia_valid & ATTR_OPEN)
2650 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2651
2652 /* Optimization: if the end result is no change, don't RPC */
2653 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2654 return 0;
2655
d530838b 2656 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2657 if (sattr->ia_valid & ATTR_FILE) {
2658 struct nfs_open_context *ctx;
2659
2660 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2661 if (ctx) {
2662 cred = ctx->cred;
2663 state = ctx->state;
2664 }
659bfcd6 2665 }
08e9eac4 2666
659bfcd6 2667 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2668 if (status == 0)
2669 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2670 return status;
2671}
2672
0c2e53f1
TM		 2673static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2674 const struct qstr *name, struct nfs_fh *fhandle,
2675 struct nfs_fattr *fattr)
2b3de441 2676{
0c2e53f1 2677 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2678 int status;
2679 struct nfs4_lookup_arg args = {
2680 .bitmask = server->attr_bitmask,
0c2e53f1 2681 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2682 .name = name,
2683 };
2684 struct nfs4_lookup_res res = {
2685 .server = server,
2686 .fattr = fattr,
2687 .fh = fhandle,
2688 };
2689 struct rpc_message msg = {
2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2691 .rpc_argp = &args,
2692 .rpc_resp = &res,
2693 };
2694
2695 nfs_fattr_init(fattr);
2696
1da177e4 2697 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2698 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2699 dprintk("NFS reply lookup: %d\n", status);
2700 return status;
2701}
2702
72de53ec 2703static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2704{
7ebb9315 2705 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2706 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2707 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2708 fattr->nlink = 2;
2709}
2710
72de53ec
BS		 2711static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2712 struct qstr *name, struct nfs_fh *fhandle,
2713 struct nfs_fattr *fattr)
1da177e4
LT		 2714{
2715 struct nfs4_exception exception = { };
72de53ec 2716 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2717 int err;
2718 do {
72de53ec
BS		 2719 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2720 switch (err) {
08ef7bd3 2721 case -NFS4ERR_BADNAME:
72de53ec
BS		 2722 err = -ENOENT;
2723 goto out;
0c2e53f1 2724 case -NFS4ERR_MOVED:
f05d147f 2725 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2726 goto out;
0c2e53f1 2727 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2728 err = -EPERM;
2729 if (client != *clnt)
2730 goto out;
2731
2732 client = nfs4_create_sec_client(client, dir, name);
2733 if (IS_ERR(client))
2734 return PTR_ERR(client);
2735
2736 exception.retry = 1;
2737 break;
2738 default:
2739 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2740 }
1da177e4 2741 } while (exception.retry);
72de53ec
BS		 2742
2743out:
2744 if (err == 0)
2745 *clnt = client;
2746 else if (client != *clnt)
2747 rpc_shutdown_client(client);
2748
1da177e4
LT		 2749 return err;
2750}
2751
80a16b21 2752static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2753 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2754{
2755 int status;
2756 struct rpc_clnt *client = NFS_CLIENT(dir);
2757
2758 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2759 if (client != NFS_CLIENT(dir)) {
2760 rpc_shutdown_client(client);
2761 nfs_fixup_secinfo_attributes(fattr);
2762 }
2763 return status;
2764}
2765
f05d147f
BS		 2766struct rpc_clnt *
2767nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2768 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2769{
2770 int status;
2771 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2772
2773 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2774 if (status < 0) {
2775 rpc_shutdown_client(client);
2776 return ERR_PTR(status);
2777 }
2778 return client;
2779}
2780
1da177e4
LT		 2781static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2782{
76b32999 2783 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2784 struct nfs4_accessargs args = {
2785 .fh = NFS_FH(inode),
a4980e78 2786 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2787 };
2788 struct nfs4_accessres res = {
2789 .server = server,
1da177e4 2790 };
1da177e4
LT		 2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2793 .rpc_argp = &args,
2794 .rpc_resp = &res,
2795 .rpc_cred = entry->cred,
2796 };
2797 int mode = entry->mask;
2798 int status;
2799
2800 /*
2801 * Determine which access bits we want to ask for...
2802 */
2803 if (mode & MAY_READ)
2804 args.access |= NFS4_ACCESS_READ;
2805 if (S_ISDIR(inode->i_mode)) {
2806 if (mode & MAY_WRITE)
2807 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2808 if (mode & MAY_EXEC)
2809 args.access |= NFS4_ACCESS_LOOKUP;
2810 } else {
2811 if (mode & MAY_WRITE)
2812 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2813 if (mode & MAY_EXEC)
2814 args.access |= NFS4_ACCESS_EXECUTE;
2815 }
c407d41a
TM		 2816
2817 res.fattr = nfs_alloc_fattr();
2818 if (res.fattr == NULL)
2819 return -ENOMEM;
2820
7c513058 2821 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2822 if (!status) {
6168f62c 2823 nfs_access_set_mask(entry, res.access);
c407d41a 2824 nfs_refresh_inode(inode, res.fattr);
1da177e4 2825 }
c407d41a 2826 nfs_free_fattr(res.fattr);
1da177e4
LT		 2827 return status;
2828}
2829
2830static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2831{
2832 struct nfs4_exception exception = { };
2833 int err;
2834 do {
2835 err = nfs4_handle_exception(NFS_SERVER(inode),
2836 _nfs4_proc_access(inode, entry),
2837 &exception);
2838 } while (exception.retry);
2839 return err;
2840}
2841
2842/*
2843 * TODO: For the time being, we don't try to get any attributes
2844 * along with any of the zero-copy operations READ, READDIR,
2845 * READLINK, WRITE.
2846 *
2847 * In the case of the first three, we want to put the GETATTR
2848 * after the read-type operation -- this is because it is hard
2849 * to predict the length of a GETATTR response in v4, and thus
2850 * align the READ data correctly. This means that the GETATTR
2851 * may end up partially falling into the page cache, and we should
2852 * shift it into the 'tail' of the xdr_buf before processing.
2853 * To do this efficiently, we need to know the total length
2854 * of data received, which doesn't seem to be available outside
2855 * of the RPC layer.
2856 *
2857 * In the case of WRITE, we also want to put the GETATTR after
2858 * the operation -- in this case because we want to make sure
140150db 2859 * we get the post-operation mtime and size.
1da177e4
LT		 2860 *
2861 * Both of these changes to the XDR layer would in fact be quite
2862 * minor, but I decided to leave them for a subsequent patch.
2863 */
2864static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2865 unsigned int pgbase, unsigned int pglen)
2866{
2867 struct nfs4_readlink args = {
2868 .fh = NFS_FH(inode),
2869 .pgbase = pgbase,
2870 .pglen = pglen,
2871 .pages = &page,
2872 };
f50c7000 2873 struct nfs4_readlink_res res;
1da177e4
LT		 2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2876 .rpc_argp = &args,
f50c7000 2877 .rpc_resp = &res,
1da177e4
LT		 2878 };
2879
7c513058 2880 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2881}
2882
2883static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2884 unsigned int pgbase, unsigned int pglen)
2885{
2886 struct nfs4_exception exception = { };
2887 int err;
2888 do {
2889 err = nfs4_handle_exception(NFS_SERVER(inode),
2890 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2891 &exception);
2892 } while (exception.retry);
2893 return err;
2894}
2895
1da177e4 2896/*
8867fe58 2897 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2898 */
1da177e4
LT		 2899static int
2900nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2901 int flags)
1da177e4 2902{
8867fe58 2903 struct nfs_open_context *ctx;
1da177e4 2904 struct nfs4_state *state;
1da177e4
LT		 2905 int status = 0;
2906
8867fe58
MS		 2907 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2908 if (IS_ERR(ctx))
2909 return PTR_ERR(ctx);
2910
a8a5da99 2911 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2912 state = nfs4_do_open(dir, dentry, ctx->mode,
2913 flags, sattr, ctx->cred,
2914 &ctx->mdsthreshold);
d4d9cdcb 2915 d_drop(dentry);
1da177e4
LT		 2916 if (IS_ERR(state)) {
2917 status = PTR_ERR(state);
c0204fd2 2918 goto out;
1da177e4 2919 }
d4d9cdcb 2920 d_add(dentry, igrab(state->inode));
d75340cc 2921 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2922 ctx->state = state;
1da177e4 2923out:
8867fe58 2924 put_nfs_open_context(ctx);
1da177e4
LT		 2925 return status;
2926}
2927
2928static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2929{
16e42959 2930 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2931 struct nfs_removeargs args = {
1da177e4 2932 .fh = NFS_FH(dir),
26fe5750 2933 .name = *name,
16e42959 2934 };
4fdc17b2 2935 struct nfs_removeres res = {
16e42959 2936 .server = server,
1da177e4 2937 };
1da177e4 2938 struct rpc_message msg = {
4fdc17b2
TM		 2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2940 .rpc_argp = &args,
2941 .rpc_resp = &res,
1da177e4 2942 };
778d2817 2943 int status;
1da177e4 2944
7c513058 2945 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2946 if (status == 0)
16e42959 2947 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2948 return status;
2949}
2950
2951static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2952{
2953 struct nfs4_exception exception = { };
2954 int err;
2955 do {
2956 err = nfs4_handle_exception(NFS_SERVER(dir),
2957 _nfs4_proc_remove(dir, name),
2958 &exception);
2959 } while (exception.retry);
2960 return err;
2961}
2962
e4eff1a6 2963static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2964{
e4eff1a6
TM		 2965 struct nfs_server *server = NFS_SERVER(dir);
2966 struct nfs_removeargs *args = msg->rpc_argp;
2967 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2968
e4eff1a6 2969 res->server = server;
1da177e4 2970 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2971 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2972}
2973
34e137cc
BS		 2974static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2975{
d9afbd1b
TM		 2976 nfs4_setup_sequence(NFS_SERVER(data->dir),
2977 &data->args.seq_args,
2978 &data->res.seq_res,
2979 task);
1da177e4
LT		 2980}
2981
e4eff1a6 2982static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2983{
e4eff1a6
TM		 2984 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2985
14516c3a
TM		 2986 if (!nfs4_sequence_done(task, &res->seq_res))
2987 return 0;
9e33bed5 2988 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2989 return 0;
2990 update_changeattr(dir, &res->cinfo);
e4eff1a6 2991 return 1;
1da177e4
LT		 2992}
2993
d3d4152a
JL		 2994static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2995{
2996 struct nfs_server *server = NFS_SERVER(dir);
2997 struct nfs_renameargs *arg = msg->rpc_argp;
2998 struct nfs_renameres *res = msg->rpc_resp;
2999
3000 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3001 res->server = server;
9d12b216 3002 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3003}
3004
c6bfa1a1
BS		 3005static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3006{
d9afbd1b
TM		 3007 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3008 &data->args.seq_args,
3009 &data->res.seq_res,
3010 task);
d3d4152a
JL		 3011}
3012
3013static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3014 struct inode *new_dir)
3015{
3016 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3017
3018 if (!nfs4_sequence_done(task, &res->seq_res))
3019 return 0;
3020 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3021 return 0;
3022
3023 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3024 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3025 return 1;
3026}
3027
1da177e4
LT		 3028static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3029 struct inode *new_dir, struct qstr *new_name)
3030{
6caf2c82 3031 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3032 struct nfs_renameargs arg = {
1da177e4
LT		 3033 .old_dir = NFS_FH(old_dir),
3034 .new_dir = NFS_FH(new_dir),
3035 .old_name = old_name,
3036 .new_name = new_name,
6caf2c82 3037 };
e8582a8b 3038 struct nfs_renameres res = {
6caf2c82 3039 .server = server,
1da177e4 3040 };
1da177e4
LT		 3041 struct rpc_message msg = {
3042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3043 .rpc_argp = &arg,
3044 .rpc_resp = &res,
3045 };
011fff72 3046 int status = -ENOMEM;
1da177e4 3047
7c513058 3048 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3049 if (!status) {
3050 update_changeattr(old_dir, &res.old_cinfo);
3051 update_changeattr(new_dir, &res.new_cinfo);
3052 }
3053 return status;
3054}
3055
3056static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3057 struct inode *new_dir, struct qstr *new_name)
3058{
3059 struct nfs4_exception exception = { };
3060 int err;
3061 do {
3062 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3063 _nfs4_proc_rename(old_dir, old_name,
3064 new_dir, new_name),
3065 &exception);
3066 } while (exception.retry);
3067 return err;
3068}
3069
3070static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3071{
91ba2eee 3072 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3073 struct nfs4_link_arg arg = {
3074 .fh = NFS_FH(inode),
3075 .dir_fh = NFS_FH(dir),
3076 .name = name,
91ba2eee
TM		 3077 .bitmask = server->attr_bitmask,
3078 };
91ba2eee
TM		 3079 struct nfs4_link_res res = {
3080 .server = server,
1da177e4 3081 };
1da177e4
LT		 3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3084 .rpc_argp = &arg,
91ba2eee 3085 .rpc_resp = &res,
1da177e4 3086 };
136f2627
TM		 3087 int status = -ENOMEM;
3088
3089 res.fattr = nfs_alloc_fattr();
778d2817 3090 if (res.fattr == NULL)
136f2627 3091 goto out;
1da177e4 3092
7c513058 3093 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3094 if (!status) {
3095 update_changeattr(dir, &res.cinfo);
73a3d07c 3096 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3097 }
136f2627 3098out:
136f2627 3099 nfs_free_fattr(res.fattr);
1da177e4
LT		 3100 return status;
3101}
3102
3103static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3104{
3105 struct nfs4_exception exception = { };
3106 int err;
3107 do {
3108 err = nfs4_handle_exception(NFS_SERVER(inode),
3109 _nfs4_proc_link(inode, dir, name),
3110 &exception);
3111 } while (exception.retry);
3112 return err;
3113}
3114
57dc9a57
TM		 3115struct nfs4_createdata {
3116 struct rpc_message msg;
3117 struct nfs4_create_arg arg;
3118 struct nfs4_create_res res;
3119 struct nfs_fh fh;
3120 struct nfs_fattr fattr;
57dc9a57
TM		 3121};
3122
3123static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3124 struct qstr *name, struct iattr *sattr, u32 ftype)
3125{
3126 struct nfs4_createdata *data;
3127
3128 data = kzalloc(sizeof(*data), GFP_KERNEL);
3129 if (data != NULL) {
3130 struct nfs_server *server = NFS_SERVER(dir);
3131
3132 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3133 data->msg.rpc_argp = &data->arg;
3134 data->msg.rpc_resp = &data->res;
3135 data->arg.dir_fh = NFS_FH(dir);
3136 data->arg.server = server;
3137 data->arg.name = name;
3138 data->arg.attrs = sattr;
3139 data->arg.ftype = ftype;
3140 data->arg.bitmask = server->attr_bitmask;
3141 data->res.server = server;
3142 data->res.fh = &data->fh;
3143 data->res.fattr = &data->fattr;
57dc9a57 3144 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3145 }
3146 return data;
3147}
3148
3149static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3150{
7c513058 3151 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3152 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3153 if (status == 0) {
3154 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3155 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3156 }
3157 return status;
3158}
3159
3160static void nfs4_free_createdata(struct nfs4_createdata *data)
3161{
3162 kfree(data);
3163}
3164
4f390c15 3165static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3166 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3167{
57dc9a57
TM		 3168 struct nfs4_createdata *data;
3169 int status = -ENAMETOOLONG;
1da177e4 3170
94a6d753 3171 if (len > NFS4_MAXPATHLEN)
57dc9a57 3172 goto out;
4f390c15 3173
57dc9a57
TM		 3174 status = -ENOMEM;
3175 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3176 if (data == NULL)
3177 goto out;
3178
3179 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3180 data->arg.u.symlink.pages = &page;
3181 data->arg.u.symlink.len = len;
1da177e4 3182
57dc9a57
TM		 3183 status = nfs4_do_create(dir, dentry, data);
3184
3185 nfs4_free_createdata(data);
3186out:
1da177e4
LT		 3187 return status;
3188}
3189
4f390c15 3190static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3191 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3192{
3193 struct nfs4_exception exception = { };
3194 int err;
3195 do {
3196 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3197 _nfs4_proc_symlink(dir, dentry, page,
3198 len, sattr),
1da177e4
LT		 3199 &exception);
3200 } while (exception.retry);
3201 return err;
3202}
3203
3204static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3205 struct iattr *sattr)
3206{
57dc9a57
TM		 3207 struct nfs4_createdata *data;
3208 int status = -ENOMEM;
1da177e4 3209
57dc9a57
TM		 3210 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3211 if (data == NULL)
3212 goto out;
3213
3214 status = nfs4_do_create(dir, dentry, data);
3215
3216 nfs4_free_createdata(data);
3217out:
1da177e4
LT		 3218 return status;
3219}
3220
3221static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3222 struct iattr *sattr)
3223{
3224 struct nfs4_exception exception = { };
3225 int err;
a8a5da99
AK		 3226
3227 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3228 do {
3229 err = nfs4_handle_exception(NFS_SERVER(dir),
3230 _nfs4_proc_mkdir(dir, dentry, sattr),
3231 &exception);
3232 } while (exception.retry);
3233 return err;
3234}
3235
3236static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3237 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3238{
3239 struct inode *dir = dentry->d_inode;
3240 struct nfs4_readdir_arg args = {
3241 .fh = NFS_FH(dir),
56e4ebf8 3242 .pages = pages,
1da177e4
LT		 3243 .pgbase = 0,
3244 .count = count,
96d25e53 3245 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3246 .plus = plus,
1da177e4
LT		 3247 };
3248 struct nfs4_readdir_res res;
3249 struct rpc_message msg = {
3250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3251 .rpc_argp = &args,
3252 .rpc_resp = &res,
3253 .rpc_cred = cred,
3254 };
3255 int status;
3256
3110ff80 3257 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3258 dentry->d_parent->d_name.name,
3259 dentry->d_name.name,
3260 (unsigned long long)cookie);
c3f52af3 3261 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3262 res.pgbase = args.pgbase;
7c513058 3263 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3264 if (status >= 0) {
c3f52af3 3265 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3266 status += args.pgbase;
3267 }
c4812998
TM		 3268
3269 nfs_invalidate_atime(dir);
3270
3110ff80 3271 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3272 return status;
3273}
3274
3275static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3276 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3277{
3278 struct nfs4_exception exception = { };
3279 int err;
3280 do {
3281 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3282 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3283 pages, count, plus),
1da177e4
LT		 3284 &exception);
3285 } while (exception.retry);
3286 return err;
3287}
3288
3289static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3290 struct iattr *sattr, dev_t rdev)
3291{
57dc9a57
TM		 3292 struct nfs4_createdata *data;
3293 int mode = sattr->ia_mode;
3294 int status = -ENOMEM;
1da177e4 3295
57dc9a57
TM		 3296 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3297 if (data == NULL)
3298 goto out;
3299
1da177e4 3300 if (S_ISFIFO(mode))
57dc9a57 3301 data->arg.ftype = NF4FIFO;
1da177e4 3302 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3303 data->arg.ftype = NF4BLK;
3304 data->arg.u.device.specdata1 = MAJOR(rdev);
3305 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3306 }
3307 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3308 data->arg.ftype = NF4CHR;
3309 data->arg.u.device.specdata1 = MAJOR(rdev);
3310 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3311 } else if (!S_ISSOCK(mode)) {
3312 status = -EINVAL;
3313 goto out_free;
1da177e4 3314 }
1da177e4 3315
57dc9a57 3316 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3317out_free:
57dc9a57
TM		 3318 nfs4_free_createdata(data);
3319out:
1da177e4
LT		 3320 return status;
3321}
3322
3323static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3324 struct iattr *sattr, dev_t rdev)
3325{
3326 struct nfs4_exception exception = { };
3327 int err;
a8a5da99
AK		 3328
3329 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3330 do {
3331 err = nfs4_handle_exception(NFS_SERVER(dir),
3332 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3333 &exception);
3334 } while (exception.retry);
3335 return err;
3336}
3337
3338static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3339 struct nfs_fsstat *fsstat)
3340{
3341 struct nfs4_statfs_arg args = {
3342 .fh = fhandle,
3343 .bitmask = server->attr_bitmask,
3344 };
24ad148a
BH		 3345 struct nfs4_statfs_res res = {
3346 .fsstat = fsstat,
3347 };
1da177e4
LT		 3348 struct rpc_message msg = {
3349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3350 .rpc_argp = &args,
24ad148a 3351 .rpc_resp = &res,
1da177e4
LT		 3352 };
3353
0e574af1 3354 nfs_fattr_init(fsstat->fattr);
7c513058 3355 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3356}
3357
3358static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3359{
3360 struct nfs4_exception exception = { };
3361 int err;
3362 do {
3363 err = nfs4_handle_exception(server,
3364 _nfs4_proc_statfs(server, fhandle, fsstat),
3365 &exception);
3366 } while (exception.retry);
3367 return err;
3368}
3369
3370static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3371 struct nfs_fsinfo *fsinfo)
3372{
3373 struct nfs4_fsinfo_arg args = {
3374 .fh = fhandle,
3375 .bitmask = server->attr_bitmask,
3376 };
3dda5e43
BH		 3377 struct nfs4_fsinfo_res res = {
3378 .fsinfo = fsinfo,
3379 };
1da177e4
LT		 3380 struct rpc_message msg = {
3381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3382 .rpc_argp = &args,
3dda5e43 3383 .rpc_resp = &res,
1da177e4
LT		 3384 };
3385
7c513058 3386 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3387}
3388
3389static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3390{
3391 struct nfs4_exception exception = { };
3392 int err;
3393
3394 do {
3395 err = nfs4_handle_exception(server,
3396 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3397 &exception);
3398 } while (exception.retry);
3399 return err;
3400}
3401
3402static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3403{
e38eb650
BS		 3404 int error;
3405
0e574af1 3406 nfs_fattr_init(fsinfo->fattr);
e38eb650 3407 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3408 if (error == 0) {
3409 /* block layout checks this! */
3410 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3411 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3412 }
e38eb650
BS		 3413
3414 return error;
1da177e4
LT		 3415}
3416
3417static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3418 struct nfs_pathconf *pathconf)
3419{
3420 struct nfs4_pathconf_arg args = {
3421 .fh = fhandle,
3422 .bitmask = server->attr_bitmask,
3423 };
d45b2989
BH		 3424 struct nfs4_pathconf_res res = {
3425 .pathconf = pathconf,
3426 };
1da177e4
LT		 3427 struct rpc_message msg = {
3428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3429 .rpc_argp = &args,
d45b2989 3430 .rpc_resp = &res,
1da177e4
LT		 3431 };
3432
3433 /* None of the pathconf attributes are mandatory to implement */
3434 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3435 memset(pathconf, 0, sizeof(*pathconf));
3436 return 0;
3437 }
3438
0e574af1 3439 nfs_fattr_init(pathconf->fattr);
7c513058 3440 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3441}
3442
3443static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3444 struct nfs_pathconf *pathconf)
3445{
3446 struct nfs4_exception exception = { };
3447 int err;
3448
3449 do {
3450 err = nfs4_handle_exception(server,
3451 _nfs4_proc_pathconf(server, fhandle, pathconf),
3452 &exception);
3453 } while (exception.retry);
3454 return err;
3455}
3456
d20581aa
BH		 3457void __nfs4_read_done_cb(struct nfs_read_data *data)
3458{
cd841605 3459 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3460}
3461
cbdabc7f 3462static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3463{
cd841605 3464 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3465
9e33bed5 3466 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3467 rpc_restart_call_prepare(task);
ec06c096 3468 return -EAGAIN;
1da177e4 3469 }
8850df99 3470
d20581aa 3471 __nfs4_read_done_cb(data);
1da177e4 3472 if (task->tk_status > 0)
ec06c096
TM		 3473 renew_lease(server, data->timestamp);
3474 return 0;
1da177e4
LT		 3475}
3476
cbdabc7f
AA		 3477static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3478{
3479
3480 dprintk("--> %s\n", __func__);
3481
3482 if (!nfs4_sequence_done(task, &data->res.seq_res))
3483 return -EAGAIN;
3484
d20581aa
BH		 3485 return data->read_done_cb ? data->read_done_cb(task, data) :
3486 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3487}
3488
bdc7f021 3489static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3490{
1da177e4 3491 data->timestamp = jiffies;
cbdabc7f 3492 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3493 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3494 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3495}
3496
ea7c3303
BS		 3497static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3498{
d9afbd1b
TM		 3499 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3500 &data->args.seq_args,
3501 &data->res.seq_res,
3502 task);
1da177e4
LT		 3503}
3504
b029bc9b 3505static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3506{
cd841605 3507 struct inode *inode = data->header->inode;
1da177e4 3508
9e33bed5 3509 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3510 rpc_restart_call_prepare(task);
788e7a89 3511 return -EAGAIN;
1da177e4 3512 }
4f9838c7 3513 if (task->tk_status >= 0) {
1da177e4 3514 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3515 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3516 }
788e7a89 3517 return 0;
1da177e4
LT		 3518}
3519
b029bc9b
FI		 3520static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3521{
3522 if (!nfs4_sequence_done(task, &data->res.seq_res))
3523 return -EAGAIN;
d20581aa
BH		 3524 return data->write_done_cb ? data->write_done_cb(task, data) :
3525 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3526}
3527
5a37f851
TM		 3528static
3529bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3530{
5a37f851
TM		 3531 const struct nfs_pgio_header *hdr = data->header;
3532
3533 /* Don't request attributes for pNFS or O_DIRECT writes */
3534 if (data->ds_clp != NULL || hdr->dreq != NULL)
3535 return false;
3536 /* Otherwise, request attributes if and only if we don't hold
3537 * a delegation
3538 */
011e2a7f 3539 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3540}
a69aef14 3541
bdc7f021 3542static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3543{
cd841605 3544 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3545
5a37f851 3546 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3547 data->args.bitmask = NULL;
3548 data->res.fattr = NULL;
3549 } else
3550 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3551
b029bc9b
FI		 3552 if (!data->write_done_cb)
3553 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3554 data->res.server = server;
1da177e4
LT		 3555 data->timestamp = jiffies;
3556
bdc7f021 3557 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3558 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3559}
3560
c6cb80d0
BS		 3561static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3562{
d9afbd1b
TM		 3563 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3564 &data->args.seq_args,
3565 &data->res.seq_res,
3566 task);
1da177e4
LT		 3567}
3568
0b7c0153 3569static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3570{
d9afbd1b
TM		 3571 nfs4_setup_sequence(NFS_SERVER(data->inode),
3572 &data->args.seq_args,
3573 &data->res.seq_res,
3574 task);
1da177e4
LT		 3575}
3576
0b7c0153 3577static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3578{
1da177e4 3579 struct inode *inode = data->inode;
14516c3a 3580
9e33bed5 3581 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3582 rpc_restart_call_prepare(task);
788e7a89 3583 return -EAGAIN;
1da177e4 3584 }
788e7a89 3585 return 0;
1da177e4
LT		 3586}
3587
0b7c0153 3588static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3589{
3590 if (!nfs4_sequence_done(task, &data->res.seq_res))
3591 return -EAGAIN;
0b7c0153 3592 return data->commit_done_cb(task, data);
5f452431
FI		 3593}
3594
0b7c0153 3595static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3596{
788e7a89 3597 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3598
0b7c0153
FI		 3599 if (data->commit_done_cb == NULL)
3600 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3601 data->res.server = server;
bdc7f021 3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3603 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3604}
3605
9bc4e3ca
CL		 3606struct nfs4_renewdata {
3607 struct nfs_client *client;
3608 unsigned long timestamp;
3609};
3610
1da177e4
LT		 3611/*
3612 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3613 * standalone procedure for queueing an asynchronous RENEW.
3614 */
9bc4e3ca 3615static void nfs4_renew_release(void *calldata)
dc96aef9 3616{
9bc4e3ca
CL		 3617 struct nfs4_renewdata *data = calldata;
3618 struct nfs_client *clp = data->client;
dc96aef9 3619
0851de06
AB		 3620 if (atomic_read(&clp->cl_count) > 1)
3621 nfs4_schedule_state_renewal(clp);
3622 nfs_put_client(clp);
9bc4e3ca 3623 kfree(data);
dc96aef9
AB		 3624}
3625
9bc4e3ca 3626static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3627{
9bc4e3ca
CL		 3628 struct nfs4_renewdata *data = calldata;
3629 struct nfs_client *clp = data->client;
3630 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3631
3632 if (task->tk_status < 0) {
95baa25c 3633 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3634 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3635 return;
3636 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3637 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3638 return;
3639 }
3640 nfs4_schedule_path_down_recovery(clp);
1da177e4 3641 }
452e9352 3642 do_renew_lease(clp, timestamp);
1da177e4
LT		 3643}
3644
963d8fe5
TM		 3645static const struct rpc_call_ops nfs4_renew_ops = {
3646 .rpc_call_done = nfs4_renew_done,
dc96aef9 3647 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3648};
3649
2f60ea6b 3650static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3651{
3652 struct rpc_message msg = {
3653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3654 .rpc_argp = clp,
b4454fe1 3655 .rpc_cred = cred,
1da177e4 3656 };
9bc4e3ca 3657 struct nfs4_renewdata *data;
1da177e4 3658
2f60ea6b
TM		 3659 if (renew_flags == 0)
3660 return 0;
0851de06
AB		 3661 if (!atomic_inc_not_zero(&clp->cl_count))
3662 return -EIO;
b569ad34 3663 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3664 if (data == NULL)
3665 return -ENOMEM;
3666 data->client = clp;
3667 data->timestamp = jiffies;
1da177e4 3668 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3669 &nfs4_renew_ops, data);
1da177e4
LT		 3670}
3671
8534d4ec 3672static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3673{
3674 struct rpc_message msg = {
3675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3676 .rpc_argp = clp,
b4454fe1 3677 .rpc_cred = cred,
1da177e4
LT		 3678 };
3679 unsigned long now = jiffies;
3680 int status;
3681
3682 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3683 if (status < 0)
3684 return status;
452e9352 3685 do_renew_lease(clp, now);
1da177e4
LT		 3686 return 0;
3687}
3688
aa1870af
BF		 3689static inline int nfs4_server_supports_acls(struct nfs_server *server)
3690{
3691 return (server->caps & NFS_CAP_ACLS)
3692 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3693 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3694}
3695
21f498c2
TM		 3696/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3697 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3698 * the stack.
3699 */
21f498c2 3700#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3701
e9e3d724
NH		 3702static int buf_to_pages_noslab(const void *buf, size_t buflen,
3703 struct page **pages, unsigned int *pgbase)
3704{
3705 struct page *newpage, **spages;
3706 int rc = 0;
3707 size_t len;
3708 spages = pages;
3709
3710 do {
21f498c2 3711 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3712 newpage = alloc_page(GFP_KERNEL);
3713
3714 if (newpage == NULL)
3715 goto unwind;
3716 memcpy(page_address(newpage), buf, len);
3717 buf += len;
3718 buflen -= len;
3719 *pages++ = newpage;
3720 rc++;
3721 } while (buflen != 0);
3722
3723 return rc;
3724
3725unwind:
3726 for(; rc > 0; rc--)
3727 __free_page(spages[rc-1]);
3728 return -ENOMEM;
3729}
3730
e50a1c2e
BF		 3731struct nfs4_cached_acl {
3732 int cached;
3733 size_t len;
3e9d4154 3734 char data[0];
e50a1c2e
BF		 3735};
3736
3737static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3738{
3739 struct nfs_inode *nfsi = NFS_I(inode);
3740
3741 spin_lock(&inode->i_lock);
3742 kfree(nfsi->nfs4_acl);
3743 nfsi->nfs4_acl = acl;
3744 spin_unlock(&inode->i_lock);
3745}
3746
3747static void nfs4_zap_acl_attr(struct inode *inode)
3748{
3749 nfs4_set_cached_acl(inode, NULL);
3750}
3751
3752static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3753{
3754 struct nfs_inode *nfsi = NFS_I(inode);
3755 struct nfs4_cached_acl *acl;
3756 int ret = -ENOENT;
3757
3758 spin_lock(&inode->i_lock);
3759 acl = nfsi->nfs4_acl;
3760 if (acl == NULL)
3761 goto out;
3762 if (buf == NULL) /* user is just asking for length */
3763 goto out_len;
3764 if (acl->cached == 0)
3765 goto out;
3766 ret = -ERANGE; /* see getxattr(2) man page */
3767 if (acl->len > buflen)
3768 goto out;
3769 memcpy(buf, acl->data, acl->len);
3770out_len:
3771 ret = acl->len;
3772out:
3773 spin_unlock(&inode->i_lock);
3774 return ret;
3775}
3776
5794d21e 3777static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3778{
3779 struct nfs4_cached_acl *acl;
b291f1b1 3780 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3781
1f1ea6c2 3782 if (buflen <= PAGE_SIZE) {
b291f1b1 3783 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3784 if (acl == NULL)
3785 goto out;
3786 acl->cached = 1;
5794d21e 3787 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3788 } else {
3789 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3790 if (acl == NULL)
3791 goto out;
3792 acl->cached = 0;
3793 }
3794 acl->len = acl_len;
3795out:
3796 nfs4_set_cached_acl(inode, acl);
3797}
3798
bf118a34
AA		 3799/*
3800 * The getxattr API returns the required buffer length when called with a
3801 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3802 * the required buf. On a NULL buf, we send a page of data to the server
3803 * guessing that the ACL request can be serviced by a page. If so, we cache
3804 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3805 * the cache. If not so, we throw away the page, and cache the required
3806 * length. The next getxattr call will then produce another round trip to
3807 * the server, this time with the input buf of the required size.
3808 */
16b4289c 3809static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3810{
bf118a34 3811 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3812 struct nfs_getaclargs args = {
3813 .fh = NFS_FH(inode),
3814 .acl_pages = pages,
3815 .acl_len = buflen,
3816 };
663c79b3
BH		 3817 struct nfs_getaclres res = {
3818 .acl_len = buflen,
3819 };
aa1870af
BF		 3820 struct rpc_message msg = {
3821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3822 .rpc_argp = &args,
663c79b3 3823 .rpc_resp = &res,
aa1870af 3824 };
21f498c2
TM		 3825 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3826 int ret = -ENOMEM, i;
aa1870af 3827
bf118a34
AA		 3828 /* As long as we're doing a round trip to the server anyway,
3829 * let's be prepared for a page of acl data. */
3830 if (npages == 0)
3831 npages = 1;
21f498c2
TM		 3832 if (npages > ARRAY_SIZE(pages))
3833 return -ERANGE;
5a006899 3834
bf118a34
AA		 3835 for (i = 0; i < npages; i++) {
3836 pages[i] = alloc_page(GFP_KERNEL);
3837 if (!pages[i])
3838 goto out_free;
e50a1c2e 3839 }
5a006899
SP		 3840
3841 /* for decoding across pages */
3842 res.acl_scratch = alloc_page(GFP_KERNEL);
3843 if (!res.acl_scratch)
3844 goto out_free;
3845
bf118a34
AA		 3846 args.acl_len = npages * PAGE_SIZE;
3847 args.acl_pgbase = 0;
5a006899 3848
de040bec 3849 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3850 __func__, buf, buflen, npages, args.acl_len);
3851 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3852 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3853 if (ret)
3854 goto out_free;
bf118a34 3855
1f1ea6c2
TM		 3856 /* Handle the case where the passed-in buffer is too short */
3857 if (res.acl_flags & NFS4_ACL_TRUNC) {
3858 /* Did the user only issue a request for the acl length? */
3859 if (buf == NULL)
3860 goto out_ok;
e50a1c2e 3861 ret = -ERANGE;
1f1ea6c2 3862 goto out_free;
e50a1c2e 3863 }
1f1ea6c2 3864 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3865 if (buf) {
3866 if (res.acl_len > buflen) {
3867 ret = -ERANGE;
3868 goto out_free;
3869 }
1f1ea6c2 3870 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3871 }
1f1ea6c2
TM		 3872out_ok:
3873 ret = res.acl_len;
e50a1c2e 3874out_free:
bf118a34
AA		 3875 for (i = 0; i < npages; i++)
3876 if (pages[i])
3877 __free_page(pages[i]);
331818f1
TM		 3878 if (res.acl_scratch)
3879 __free_page(res.acl_scratch);
aa1870af
BF		 3880 return ret;
3881}
3882
16b4289c
TM		 3883static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3884{
3885 struct nfs4_exception exception = { };
3886 ssize_t ret;
3887 do {
3888 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3889 if (ret >= 0)
3890 break;
3891 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3892 } while (exception.retry);
3893 return ret;
3894}
3895
e50a1c2e
BF		 3896static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3897{
3898 struct nfs_server *server = NFS_SERVER(inode);
3899 int ret;
3900
3901 if (!nfs4_server_supports_acls(server))
3902 return -EOPNOTSUPP;
3903 ret = nfs_revalidate_inode(server, inode);
3904 if (ret < 0)
3905 return ret;
08a22b39
AK		 3906 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3907 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3908 ret = nfs4_read_cached_acl(inode, buf, buflen);
3909 if (ret != -ENOENT)
bf118a34
AA		 3910 /* -ENOENT is returned if there is no ACL or if there is an ACL
3911 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3912 return ret;
3913 return nfs4_get_acl_uncached(inode, buf, buflen);
3914}
3915
16b4289c 3916static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3917{
3918 struct nfs_server *server = NFS_SERVER(inode);
3919 struct page *pages[NFS4ACL_MAXPAGES];
3920 struct nfs_setaclargs arg = {
3921 .fh = NFS_FH(inode),
3922 .acl_pages = pages,
3923 .acl_len = buflen,
3924 };
73c403a9 3925 struct nfs_setaclres res;
4b580ee3
BF		 3926 struct rpc_message msg = {
3927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3928 .rpc_argp = &arg,
73c403a9 3929 .rpc_resp = &res,
4b580ee3 3930 };
21f498c2 3931 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3932 int ret, i;
4b580ee3
BF		 3933
3934 if (!nfs4_server_supports_acls(server))
3935 return -EOPNOTSUPP;
21f498c2
TM		 3936 if (npages > ARRAY_SIZE(pages))
3937 return -ERANGE;
e9e3d724
NH		 3938 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3939 if (i < 0)
3940 return i;
57ec14c5 3941 nfs4_inode_return_delegation(inode);
7c513058 3942 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3943
3944 /*
3945 * Free each page after tx, so the only ref left is
3946 * held by the network stack
3947 */
3948 for (; i > 0; i--)
3949 put_page(pages[i-1]);
3950
08a22b39
AK		 3951 /*
3952 * Acl update can result in inode attribute update.
3953 * so mark the attribute cache invalid.
3954 */
3955 spin_lock(&inode->i_lock);
3956 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3957 spin_unlock(&inode->i_lock);
f41f7418
TM		 3958 nfs_access_zap_cache(inode);
3959 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3960 return ret;
3961}
3962
16b4289c
TM		 3963static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3964{
3965 struct nfs4_exception exception = { };
3966 int err;
3967 do {
3968 err = nfs4_handle_exception(NFS_SERVER(inode),
3969 __nfs4_proc_set_acl(inode, buf, buflen),
3970 &exception);
3971 } while (exception.retry);
3972 return err;
3973}
3974
1da177e4 3975static int
aa5190d0 3976nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3977{
aa5190d0
TM		 3978 struct nfs_client *clp = server->nfs_client;
3979
3980 if (task->tk_status >= 0)
1da177e4
LT		 3981 return 0;
3982 switch(task->tk_status) {
a1d0b5ee 3983 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3984 case -NFS4ERR_ADMIN_REVOKED:
3985 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3986 if (state == NULL)
3987 break;
3988 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3989 case -NFS4ERR_OPENMODE:
3990 if (state == NULL)
3991 break;
5d422301
TM		 3992 if (nfs4_schedule_stateid_recovery(server, state) < 0)
3993 goto stateid_invalid;
0400a6b0 3994 goto wait_on_recovery;
0ced63d1 3995 case -NFS4ERR_EXPIRED:
5d422301
TM		 3996 if (state != NULL) {
3997 if (nfs4_schedule_stateid_recovery(server, state) < 0)
3998 goto stateid_invalid;
3999 }
1da177e4 4000 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4001 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4002 nfs4_schedule_lease_recovery(clp);
4003 goto wait_on_recovery;
4745e315
AA		 4004#if defined(CONFIG_NFS_V4_1)
4005 case -NFS4ERR_BADSESSION:
4006 case -NFS4ERR_BADSLOT:
4007 case -NFS4ERR_BAD_HIGH_SLOT:
4008 case -NFS4ERR_DEADSESSION:
4009 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4010 case -NFS4ERR_SEQ_FALSE_RETRY:
4011 case -NFS4ERR_SEQ_MISORDERED:
4012 dprintk("%s ERROR %d, Reset session\n", __func__,
4013 task->tk_status);
9f594791 4014 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4015 task->tk_status = 0;
4016 return -EAGAIN;
4017#endif /* CONFIG_NFS_V4_1 */
1da177e4 4018 case -NFS4ERR_DELAY:
aa5190d0 4019 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4020 case -NFS4ERR_GRACE:
1da177e4
LT		 4021 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4022 task->tk_status = 0;
4023 return -EAGAIN;
a8a4ae3a 4024 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4025 case -NFS4ERR_OLD_STATEID:
4026 task->tk_status = 0;
4027 return -EAGAIN;
4028 }
4029 task->tk_status = nfs4_map_errors(task->tk_status);
4030 return 0;
5d422301
TM		 4031stateid_invalid:
4032 task->tk_status = -EIO;
4033 return 0;
0400a6b0 4034wait_on_recovery:
a2c0b9e2 4035 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4036 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4037 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4038 task->tk_status = 0;
4039 return -EAGAIN;
1da177e4
LT		 4040}
4041
f092075d
CL		 4042static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4043 nfs4_verifier *bootverf)
cd93710e
CL		 4044{
4045 __be32 verf[2];
4046
2c820d9a
CL		 4047 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4048 /* An impossible timestamp guarantees this value
4049 * will never match a generated boot time. */
4050 verf[0] = 0;
4051 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4052 } else {
f092075d
CL		 4053 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4054 verf[0] = (__be32)nn->boot_time.tv_sec;
4055 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4056 }
cd93710e
CL		 4057 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4058}
4059
e984a55a
CL		 4060static unsigned int
4061nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4062 char *buf, size_t len)
4063{
4064 unsigned int result;
4065
4066 rcu_read_lock();
4067 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4068 clp->cl_ipaddr,
4069 rpc_peeraddr2str(clp->cl_rpcclient,
4070 RPC_DISPLAY_ADDR),
4071 rpc_peeraddr2str(clp->cl_rpcclient,
4072 RPC_DISPLAY_PROTO));
4073 rcu_read_unlock();
4074 return result;
4075}
4076
4077static unsigned int
4078nfs4_init_uniform_client_string(const struct nfs_client *clp,
4079 char *buf, size_t len)
4080{
6f2ea7f2
CL		 4081 char *nodename = clp->cl_rpcclient->cl_nodename;
4082
4083 if (nfs4_client_id_uniquifier[0] != '\0')
4084 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4085 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4086 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4087 nodename);
e984a55a
CL		 4088}
4089
6bbb4ae8
CL		 4090/**
4091 * nfs4_proc_setclientid - Negotiate client ID
4092 * @clp: state data structure
4093 * @program: RPC program for NFSv4 callback service
4094 * @port: IP port number for NFS4 callback service
4095 * @cred: RPC credential to use for this call
4096 * @res: where to place the result
4097 *
4098 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4099 */
bb8b27e5
TM		 4100int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4101 unsigned short port, struct rpc_cred *cred,
4102 struct nfs4_setclientid_res *res)
1da177e4
LT		 4103{
4104 nfs4_verifier sc_verifier;
4105 struct nfs4_setclientid setclientid = {
4106 .sc_verifier = &sc_verifier,
4107 .sc_prog = program,
f4eecd5d 4108 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4109 };
4110 struct rpc_message msg = {
4111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4112 .rpc_argp = &setclientid,
bb8b27e5 4113 .rpc_resp = res,
286d7d6a 4114 .rpc_cred = cred,
1da177e4 4115 };
6bbb4ae8 4116 int status;
1da177e4 4117
de734831 4118 /* nfs_client_id4 */
f092075d 4119 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4120 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4121 setclientid.sc_name_len =
4122 nfs4_init_uniform_client_string(clp,
4123 setclientid.sc_name,
4124 sizeof(setclientid.sc_name));
4125 else
4126 setclientid.sc_name_len =
4127 nfs4_init_nonuniform_client_string(clp,
4128 setclientid.sc_name,
4129 sizeof(setclientid.sc_name));
de734831 4130 /* cb_client4 */
e984a55a 4131 rcu_read_lock();
de734831 4132 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4133 sizeof(setclientid.sc_netid),
4134 rpc_peeraddr2str(clp->cl_rpcclient,
4135 RPC_DISPLAY_NETID));
de734831
CL		 4136 rcu_read_unlock();
4137 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4138 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4139 clp->cl_ipaddr, port >> 8, port & 255);
4140
6bbb4ae8
CL		 4141 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4142 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4143 setclientid.sc_name_len, setclientid.sc_name);
4144 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4145 dprintk("NFS reply setclientid: %d\n", status);
4146 return status;
1da177e4
LT		 4147}
4148
6bbb4ae8
CL		 4149/**
4150 * nfs4_proc_setclientid_confirm - Confirm client ID
4151 * @clp: state data structure
4152 * @res: result of a previous SETCLIENTID
4153 * @cred: RPC credential to use for this call
4154 *
4155 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4156 */
fd954ae1 4157int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4158 struct nfs4_setclientid_res *arg,
4159 struct rpc_cred *cred)
1da177e4
LT		 4160{
4161 struct nfs_fsinfo fsinfo;
4162 struct rpc_message msg = {
4163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4164 .rpc_argp = arg,
1da177e4 4165 .rpc_resp = &fsinfo,
286d7d6a 4166 .rpc_cred = cred,
1da177e4
LT		 4167 };
4168 unsigned long now;
4169 int status;
4170
6bbb4ae8
CL		 4171 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4172 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4173 clp->cl_clientid);
1da177e4 4174 now = jiffies;
1bd714f2 4175 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4176 if (status == 0) {
4177 spin_lock(&clp->cl_lock);
4178 clp->cl_lease_time = fsinfo.lease_time * HZ;
4179 clp->cl_last_renewal = now;
4180 spin_unlock(&clp->cl_lock);
4181 }
6bbb4ae8 4182 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4183 return status;
4184}
4185
fe650407
TM		 4186struct nfs4_delegreturndata {
4187 struct nfs4_delegreturnargs args;
fa178f29 4188 struct nfs4_delegreturnres res;
fe650407
TM		 4189 struct nfs_fh fh;
4190 nfs4_stateid stateid;
26e976a8 4191 unsigned long timestamp;
fa178f29 4192 struct nfs_fattr fattr;
fe650407
TM		 4193 int rpc_status;
4194};
4195
fe650407
TM		 4196static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4197{
4198 struct nfs4_delegreturndata *data = calldata;
938e1010 4199
14516c3a
TM		 4200 if (!nfs4_sequence_done(task, &data->res.seq_res))
4201 return;
938e1010 4202
79708861
RL		 4203 switch (task->tk_status) {
4204 case -NFS4ERR_STALE_STATEID:
4205 case -NFS4ERR_EXPIRED:
4206 case 0:
fa178f29 4207 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4208 break;
4209 default:
4210 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4211 -EAGAIN) {
d00c5d43 4212 rpc_restart_call_prepare(task);
79708861
RL		 4213 return;
4214 }
4215 }
4216 data->rpc_status = task->tk_status;
fe650407
TM		 4217}
4218
4219static void nfs4_delegreturn_release(void *calldata)
4220{
fe650407
TM		 4221 kfree(calldata);
4222}
4223
938e1010
AA		 4224#if defined(CONFIG_NFS_V4_1)
4225static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4226{
4227 struct nfs4_delegreturndata *d_data;
4228
4229 d_data = (struct nfs4_delegreturndata *)data;
4230
d9afbd1b
TM		 4231 nfs4_setup_sequence(d_data->res.server,
4232 &d_data->args.seq_args,
4233 &d_data->res.seq_res,
4234 task);
938e1010
AA		 4235}
4236#endif /* CONFIG_NFS_V4_1 */
4237
c8d149f3 4238static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4239#if defined(CONFIG_NFS_V4_1)
4240 .rpc_call_prepare = nfs4_delegreturn_prepare,
4241#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4242 .rpc_call_done = nfs4_delegreturn_done,
4243 .rpc_release = nfs4_delegreturn_release,
4244};
4245
e6f81075 4246static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4247{
4248 struct nfs4_delegreturndata *data;
fa178f29 4249 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4250 struct rpc_task *task;
5138fde0
TM		 4251 struct rpc_message msg = {
4252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4253 .rpc_cred = cred,
4254 };
c970aa85
TM		 4255 struct rpc_task_setup task_setup_data = {
4256 .rpc_client = server->client,
5138fde0 4257 .rpc_message = &msg,
c970aa85
TM		 4258 .callback_ops = &nfs4_delegreturn_ops,
4259 .flags = RPC_TASK_ASYNC,
4260 };
e6f81075 4261 int status = 0;
fe650407 4262
8535b2be 4263 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4264 if (data == NULL)
4265 return -ENOMEM;
9d12b216 4266 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4267 data->args.fhandle = &data->fh;
4268 data->args.stateid = &data->stateid;
9e907fec 4269 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4270 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4271 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4272 data->res.fattr = &data->fattr;
4273 data->res.server = server;
5138fde0 4274 nfs_fattr_init(data->res.fattr);
26e976a8 4275 data->timestamp = jiffies;
fe650407
TM		 4276 data->rpc_status = 0;
4277
c970aa85 4278 task_setup_data.callback_data = data;
1174dd1f
TM		 4279 msg.rpc_argp = &data->args;
4280 msg.rpc_resp = &data->res;
c970aa85 4281 task = rpc_run_task(&task_setup_data);
7a1218a2 4282 if (IS_ERR(task))
fe650407 4283 return PTR_ERR(task);
e6f81075
TM		 4284 if (!issync)
4285 goto out;
fe650407 4286 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4287 if (status != 0)
4288 goto out;
4289 status = data->rpc_status;
e144cbcc
TM		 4290 if (status == 0)
4291 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4292 else
4293 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4294out:
e6b3c4db 4295 rpc_put_task(task);
fe650407 4296 return status;
1da177e4
LT		 4297}
4298
e6f81075 4299int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4300{
4301 struct nfs_server *server = NFS_SERVER(inode);
4302 struct nfs4_exception exception = { };
4303 int err;
4304 do {
e6f81075 4305 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4306 switch (err) {
4307 case -NFS4ERR_STALE_STATEID:
4308 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4309 case 0:
4310 return 0;
4311 }
4312 err = nfs4_handle_exception(server, err, &exception);
4313 } while (exception.retry);
4314 return err;
4315}
4316
4317#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4318#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4319
4320/*
4321 * sleep, with exponential backoff, and retry the LOCK operation.
4322 */
4323static unsigned long
4324nfs4_set_lock_task_retry(unsigned long timeout)
4325{
d310310c 4326 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4327 timeout <<= 1;
4328 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4329 return NFS4_LOCK_MAXTIMEOUT;
4330 return timeout;
4331}
4332
1da177e4
LT		 4333static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4334{
4335 struct inode *inode = state->inode;
4336 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4337 struct nfs_client *clp = server->nfs_client;
911d1aaf 4338 struct nfs_lockt_args arg = {
1da177e4 4339 .fh = NFS_FH(inode),
911d1aaf 4340 .fl = request,
1da177e4 4341 };
911d1aaf
TM		 4342 struct nfs_lockt_res res = {
4343 .denied = request,
1da177e4
LT		 4344 };
4345 struct rpc_message msg = {
4346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4347 .rpc_argp = &arg,
4348 .rpc_resp = &res,
4349 .rpc_cred = state->owner->so_cred,
4350 };
1da177e4
LT		 4351 struct nfs4_lock_state *lsp;
4352 int status;
4353
911d1aaf 4354 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4355 status = nfs4_set_lock_state(state, request);
4356 if (status != 0)
4357 goto out;
4358 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4359 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4360 arg.lock_owner.s_dev = server->s_dev;
7c513058 4361 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4362 switch (status) {
4363 case 0:
4364 request->fl_type = F_UNLCK;
4365 break;
4366 case -NFS4ERR_DENIED:
4367 status = 0;
1da177e4 4368 }
70cc6487 4369 request->fl_ops->fl_release_private(request);
8d0a8a9d 4370out:
1da177e4
LT		 4371 return status;
4372}
4373
4374static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4375{
4376 struct nfs4_exception exception = { };
4377 int err;
4378
4379 do {
4380 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4381 _nfs4_proc_getlk(state, cmd, request),
4382 &exception);
4383 } while (exception.retry);
4384 return err;
4385}
4386
4387static int do_vfs_lock(struct file *file, struct file_lock *fl)
4388{
4389 int res = 0;
4390 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4391 case FL_POSIX:
4392 res = posix_lock_file_wait(file, fl);
4393 break;
4394 case FL_FLOCK:
4395 res = flock_lock_file_wait(file, fl);
4396 break;
4397 default:
4398 BUG();
4399 }
1da177e4
LT		 4400 return res;
4401}
4402
faf5f49c 4403struct nfs4_unlockdata {
911d1aaf
TM		 4404 struct nfs_locku_args arg;
4405 struct nfs_locku_res res;
faf5f49c
TM		 4406 struct nfs4_lock_state *lsp;
4407 struct nfs_open_context *ctx;
911d1aaf
TM		 4408 struct file_lock fl;
4409 const struct nfs_server *server;
26e976a8 4410 unsigned long timestamp;
faf5f49c
TM		 4411};
4412
911d1aaf
TM		 4413static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4414 struct nfs_open_context *ctx,
4415 struct nfs4_lock_state *lsp,
4416 struct nfs_seqid *seqid)
4417{
4418 struct nfs4_unlockdata *p;
4419 struct inode *inode = lsp->ls_state->inode;
4420
8535b2be 4421 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4422 if (p == NULL)
4423 return NULL;
4424 p->arg.fh = NFS_FH(inode);
4425 p->arg.fl = &p->fl;
4426 p->arg.seqid = seqid;
c1d51931 4427 p->res.seqid = seqid;
911d1aaf
TM		 4428 p->arg.stateid = &lsp->ls_stateid;
4429 p->lsp = lsp;
4430 atomic_inc(&lsp->ls_count);
4431 /* Ensure we don't close file until we're done freeing locks! */
4432 p->ctx = get_nfs_open_context(ctx);
4433 memcpy(&p->fl, fl, sizeof(p->fl));
4434 p->server = NFS_SERVER(inode);
4435 return p;
4436}
4437
06f814a3 4438static void nfs4_locku_release_calldata(void *data)
faf5f49c 4439{
963d8fe5 4440 struct nfs4_unlockdata *calldata = data;
911d1aaf 4441 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4442 nfs4_put_lock_state(calldata->lsp);
4443 put_nfs_open_context(calldata->ctx);
4444 kfree(calldata);
faf5f49c
TM		 4445}
4446
963d8fe5 4447static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4448{
963d8fe5 4449 struct nfs4_unlockdata *calldata = data;
faf5f49c 4450
14516c3a
TM		 4451 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4452 return;
faf5f49c
TM		 4453 switch (task->tk_status) {
4454 case 0:
f597c537
TM		 4455 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4456 &calldata->res.stateid);
26e976a8 4457 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4458 break;
9e33bed5
TM		 4459 case -NFS4ERR_BAD_STATEID:
4460 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4461 case -NFS4ERR_STALE_STATEID:
4462 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4463 break;
4464 default:
9e33bed5 4465 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4466 rpc_restart_call_prepare(task);
faf5f49c 4467 }
2b1bc308 4468 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4469}
4470
4ce70ada 4471static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4472{
4ce70ada 4473 struct nfs4_unlockdata *calldata = data;
faf5f49c 4474
911d1aaf 4475 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4476 goto out_wait;
795a88c9 4477 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4478 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4479 goto out_no_action;
faf5f49c 4480 }
26e976a8 4481 calldata->timestamp = jiffies;
035168ab 4482 if (nfs4_setup_sequence(calldata->server,
a893693c 4483 &calldata->arg.seq_args,
2240a9e2
TM		 4484 &calldata->res.seq_res,
4485 task) != 0)
4486 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4487 return;
4488out_no_action:
4489 task->tk_action = NULL;
4490out_wait:
4491 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4492}
4493
963d8fe5 4494static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4495 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4496 .rpc_call_done = nfs4_locku_done,
06f814a3 4497 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4498};
4499
a5d16a4d
TM		 4500static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4501 struct nfs_open_context *ctx,
4502 struct nfs4_lock_state *lsp,
4503 struct nfs_seqid *seqid)
4504{
4505 struct nfs4_unlockdata *data;
5138fde0
TM		 4506 struct rpc_message msg = {
4507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4508 .rpc_cred = ctx->cred,
4509 };
c970aa85
TM		 4510 struct rpc_task_setup task_setup_data = {
4511 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4512 .rpc_message = &msg,
c970aa85 4513 .callback_ops = &nfs4_locku_ops,
101070ca 4514 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4515 .flags = RPC_TASK_ASYNC,
4516 };
a5d16a4d 4517
137d6aca
FF		 4518 /* Ensure this is an unlock - when canceling a lock, the
4519 * canceled lock is passed in, and it won't be an unlock.
4520 */
4521 fl->fl_type = F_UNLCK;
4522
a5d16a4d
TM		 4523 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4524 if (data == NULL) {
4525 nfs_free_seqid(seqid);
4526 return ERR_PTR(-ENOMEM);
4527 }
4528
9d12b216 4529 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4530 msg.rpc_argp = &data->arg;
4531 msg.rpc_resp = &data->res;
c970aa85
TM		 4532 task_setup_data.callback_data = data;
4533 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4534}
4535
faf5f49c
TM		 4536static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4537{
65b62a29
TM		 4538 struct inode *inode = state->inode;
4539 struct nfs4_state_owner *sp = state->owner;
4540 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4541 struct nfs_seqid *seqid;
1da177e4 4542 struct nfs4_lock_state *lsp;
06f814a3
TM		 4543 struct rpc_task *task;
4544 int status = 0;
536ff0f8 4545 unsigned char fl_flags = request->fl_flags;
faf5f49c 4546
8d0a8a9d 4547 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4548 /* Unlock _before_ we do the RPC call */
4549 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4550 /* Exclude nfs_delegation_claim_locks() */
4551 mutex_lock(&sp->so_delegreturn_mutex);
4552 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4553 down_read(&nfsi->rwsem);
4554 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4555 up_read(&nfsi->rwsem);
65b62a29 4556 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4557 goto out;
19e03c57
TM		 4558 }
4559 up_read(&nfsi->rwsem);
65b62a29 4560 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4561 if (status != 0)
9b073574
TM		 4562 goto out;
4563 /* Is this a delegated lock? */
4564 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4565 goto out;
8d0a8a9d 4566 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4567 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4568 status = -ENOMEM;
911d1aaf 4569 if (seqid == NULL)
9b073574 4570 goto out;
cd3758e3 4571 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4572 status = PTR_ERR(task);
4573 if (IS_ERR(task))
9b073574 4574 goto out;
a5d16a4d 4575 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4576 rpc_put_task(task);
9b073574 4577out:
536ff0f8 4578 request->fl_flags = fl_flags;
1da177e4
LT		 4579 return status;
4580}
4581
a5d16a4d
TM		 4582struct nfs4_lockdata {
4583 struct nfs_lock_args arg;
4584 struct nfs_lock_res res;
4585 struct nfs4_lock_state *lsp;
4586 struct nfs_open_context *ctx;
4587 struct file_lock fl;
26e976a8 4588 unsigned long timestamp;
a5d16a4d
TM		 4589 int rpc_status;
4590 int cancelled;
66179efe 4591 struct nfs_server *server;
a5d16a4d
TM		 4592};
4593
4594static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4595 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4596 gfp_t gfp_mask)
1da177e4 4597{
a5d16a4d
TM		 4598 struct nfs4_lockdata *p;
4599 struct inode *inode = lsp->ls_state->inode;
1da177e4 4600 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4601
8535b2be 4602 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4603 if (p == NULL)
4604 return NULL;
4605
4606 p->arg.fh = NFS_FH(inode);
4607 p->arg.fl = &p->fl;
8535b2be 4608 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4609 if (p->arg.open_seqid == NULL)
4610 goto out_free;
8535b2be 4611 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4612 if (p->arg.lock_seqid == NULL)
2f74c0a0 4613 goto out_free_seqid;
a5d16a4d 4614 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4615 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4616 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4617 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4618 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4619 p->lsp = lsp;
66179efe 4620 p->server = server;
a5d16a4d
TM		 4621 atomic_inc(&lsp->ls_count);
4622 p->ctx = get_nfs_open_context(ctx);
4623 memcpy(&p->fl, fl, sizeof(p->fl));
4624 return p;
2f74c0a0
TM		 4625out_free_seqid:
4626 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4627out_free:
4628 kfree(p);
4629 return NULL;
4630}
4631
4632static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4633{
4634 struct nfs4_lockdata *data = calldata;
4635 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4636
3110ff80 4637 dprintk("%s: begin!\n", __func__);
2f74c0a0 4638 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4639 goto out_wait;
a5d16a4d
TM		 4640 /* Do we need to do an open_to_lock_owner? */
4641 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4642 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4643 goto out_release_lock_seqid;
8fe72bac 4644 }
a5d16a4d
TM		 4645 data->arg.open_stateid = &state->stateid;
4646 data->arg.new_lock_owner = 1;
c1d51931 4647 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4648 } else
4649 data->arg.new_lock_owner = 0;
5d422301
TM		 4650 if (!nfs4_valid_open_stateid(state)) {
4651 data->rpc_status = -EBADF;
4652 task->tk_action = NULL;
4653 goto out_release_open_seqid;
4654 }
26e976a8 4655 data->timestamp = jiffies;
035168ab
TM		 4656 if (nfs4_setup_sequence(data->server,
4657 &data->arg.seq_args,
2240a9e2 4658 &data->res.seq_res,
d9afbd1b 4659 task) == 0)
66179efe 4660 return;
5d422301 4661out_release_open_seqid:
2240a9e2
TM		 4662 nfs_release_seqid(data->arg.open_seqid);
4663out_release_lock_seqid:
4664 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4665out_wait:
4666 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4667 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4668}
4669
a5d16a4d
TM		 4670static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4671{
4672 struct nfs4_lockdata *data = calldata;
4673
3110ff80 4674 dprintk("%s: begin!\n", __func__);
a5d16a4d 4675
14516c3a
TM		 4676 if (!nfs4_sequence_done(task, &data->res.seq_res))
4677 return;
66179efe 4678
a5d16a4d 4679 data->rpc_status = task->tk_status;
a5d16a4d 4680 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4681 if (data->rpc_status == 0)
4682 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4683 else
4684 goto out;
4685 }
4686 if (data->rpc_status == 0) {
f597c537 4687 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4688 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4689 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4690 }
a5d16a4d 4691out:
3110ff80 4692 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4693}
4694
4695static void nfs4_lock_release(void *calldata)
4696{
4697 struct nfs4_lockdata *data = calldata;
4698
3110ff80 4699 dprintk("%s: begin!\n", __func__);
2f74c0a0 4700 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4701 if (data->cancelled != 0) {
4702 struct rpc_task *task;
4703 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4704 data->arg.lock_seqid);
4705 if (!IS_ERR(task))
bf294b41 4706 rpc_put_task_async(task);
3110ff80 4707 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4708 } else
4709 nfs_free_seqid(data->arg.lock_seqid);
4710 nfs4_put_lock_state(data->lsp);
4711 put_nfs_open_context(data->ctx);
4712 kfree(data);
3110ff80 4713 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4714}
4715
4716static const struct rpc_call_ops nfs4_lock_ops = {
4717 .rpc_call_prepare = nfs4_lock_prepare,
4718 .rpc_call_done = nfs4_lock_done,
4719 .rpc_release = nfs4_lock_release,
4720};
4721
2bee72a6
TM		 4722static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4723{
2bee72a6
TM		 4724 switch (error) {
4725 case -NFS4ERR_ADMIN_REVOKED:
4726 case -NFS4ERR_BAD_STATEID:
ecac799a 4727 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4728 if (new_lock_owner != 0 ||
795a88c9 4729 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4730 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4731 break;
4732 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4733 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4734 case -NFS4ERR_EXPIRED:
4735 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4736 };
4737}
4738
afe6c27c 4739static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4740{
4741 struct nfs4_lockdata *data;
4742 struct rpc_task *task;
5138fde0
TM		 4743 struct rpc_message msg = {
4744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4745 .rpc_cred = state->owner->so_cred,
4746 };
c970aa85
TM		 4747 struct rpc_task_setup task_setup_data = {
4748 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4749 .rpc_message = &msg,
c970aa85 4750 .callback_ops = &nfs4_lock_ops,
101070ca 4751 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4752 .flags = RPC_TASK_ASYNC,
4753 };
a5d16a4d
TM		 4754 int ret;
4755
3110ff80 4756 dprintk("%s: begin!\n", __func__);
cd3758e3 4757 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4758 fl->fl_u.nfs4_fl.owner,
4759 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4760 if (data == NULL)
4761 return -ENOMEM;
4762 if (IS_SETLKW(cmd))
4763 data->arg.block = 1;
9d12b216 4764 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4765 msg.rpc_argp = &data->arg;
4766 msg.rpc_resp = &data->res;
c970aa85 4767 task_setup_data.callback_data = data;
8fe72bac
TM		 4768 if (recovery_type > NFS_LOCK_NEW) {
4769 if (recovery_type == NFS_LOCK_RECLAIM)
4770 data->arg.reclaim = NFS_LOCK_RECLAIM;
4771 nfs4_set_sequence_privileged(&data->arg.seq_args);
4772 }
c970aa85 4773 task = rpc_run_task(&task_setup_data);
7a1218a2 4774 if (IS_ERR(task))
a5d16a4d 4775 return PTR_ERR(task);
a5d16a4d
TM		 4776 ret = nfs4_wait_for_completion_rpc_task(task);
4777 if (ret == 0) {
4778 ret = data->rpc_status;
2bee72a6
TM		 4779 if (ret)
4780 nfs4_handle_setlk_error(data->server, data->lsp,
4781 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4782 } else
4783 data->cancelled = 1;
e6b3c4db 4784 rpc_put_task(task);
3110ff80 4785 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4786 return ret;
1da177e4
LT		 4787}
4788
4789static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4790{
202b50dc 4791 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4792 struct nfs4_exception exception = {
4793 .inode = state->inode,
4794 };
202b50dc
TM		 4795 int err;
4796
4797 do {
42a2d13e
TM		 4798 /* Cache the lock if possible... */
4799 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4800 return 0;
afe6c27c 4801 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4802 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4803 break;
4804 nfs4_handle_exception(server, err, &exception);
4805 } while (exception.retry);
4806 return err;
1da177e4
LT		 4807}
4808
4809static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4810{
202b50dc 4811 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4812 struct nfs4_exception exception = {
4813 .inode = state->inode,
4814 };
202b50dc
TM		 4815 int err;
4816
6bfc93ef
TM		 4817 err = nfs4_set_lock_state(state, request);
4818 if (err != 0)
4819 return err;
202b50dc 4820 do {
42a2d13e
TM		 4821 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4822 return 0;
afe6c27c 4823 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4824 switch (err) {
4825 default:
4826 goto out;
4827 case -NFS4ERR_GRACE:
4828 case -NFS4ERR_DELAY:
4829 nfs4_handle_exception(server, err, &exception);
4830 err = 0;
4831 }
202b50dc 4832 } while (exception.retry);
a9ed2e25 4833out:
202b50dc 4834 return err;
1da177e4
LT		 4835}
4836
f062eb6c 4837#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4838/**
4839 * nfs41_check_expired_locks - possibly free a lock stateid
4840 *
4841 * @state: NFSv4 state for an inode
4842 *
4843 * Returns NFS_OK if recovery for this stateid is now finished.
4844 * Otherwise a negative NFS4ERR value is returned.
4845 */
b01dd1d8 4846static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4847{
eb64cf96 4848 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4849 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4850 struct nfs_server *server = NFS_SERVER(state->inode);
4851
b01dd1d8 4852 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4853 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4854 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4855 if (status != NFS_OK) {
3e60ffdd
CL		 4856 /* Free the stateid unless the server
4857 * informs us the stateid is unrecognized. */
89af2739
CL		 4858 if (status != -NFS4ERR_BAD_STATEID)
4859 nfs41_free_stateid(server,
4860 &lsp->ls_stateid);
795a88c9 4861 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4862 ret = status;
4863 }
4864 }
4865 };
4866
4867 return ret;
4868}
4869
4870static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4871{
4872 int status = NFS_OK;
4873
4874 if (test_bit(LK_STATE_IN_USE, &state->flags))
4875 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4876 if (status != NFS_OK)
4877 status = nfs4_lock_expired(state, request);
4878 return status;
f062eb6c
BS		 4879}
4880#endif
4881
1da177e4
LT		 4882static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4883{
9a99af49 4884 struct nfs4_state_owner *sp = state->owner;
19e03c57 4885 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4886 unsigned char fl_flags = request->fl_flags;
9a99af49 4887 unsigned int seq;
8e469ebd 4888 int status = -ENOLCK;
1da177e4 4889
8e469ebd
TM		 4890 if ((fl_flags & FL_POSIX) &&
4891 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4892 goto out;
6bfc93ef 4893 /* Is this a delegated open? */
6bfc93ef
TM		 4894 status = nfs4_set_lock_state(state, request);
4895 if (status != 0)
4896 goto out;
01c3b861
TM		 4897 request->fl_flags |= FL_ACCESS;
4898 status = do_vfs_lock(request->fl_file, request);
4899 if (status < 0)
4900 goto out;
19e03c57 4901 down_read(&nfsi->rwsem);
01c3b861 4902 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4903 /* Yes: cache locks! */
01c3b861 4904 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4905 request->fl_flags = fl_flags & ~FL_SLEEP;
4906 status = do_vfs_lock(request->fl_file, request);
4907 goto out_unlock;
01c3b861 4908 }
9a99af49
TM		 4909 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4910 up_read(&nfsi->rwsem);
afe6c27c 4911 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4912 if (status != 0)
9a99af49
TM		 4913 goto out;
4914 down_read(&nfsi->rwsem);
4915 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4916 status = -NFS4ERR_DELAY;
01c3b861 4917 goto out_unlock;
9a99af49 4918 }
6bfc93ef 4919 /* Note: we always want to sleep here! */
01c3b861 4920 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4921 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4922 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4923 "manager!\n", __func__);
01c3b861 4924out_unlock:
19e03c57 4925 up_read(&nfsi->rwsem);
01c3b861
TM		 4926out:
4927 request->fl_flags = fl_flags;
1da177e4
LT		 4928 return status;
4929}
4930
4931static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4932{
a1d0b5ee
TM		 4933 struct nfs4_exception exception = {
4934 .state = state,
05ffe24f 4935 .inode = state->inode,
a1d0b5ee 4936 };
1da177e4
LT		 4937 int err;
4938
4939 do {
965b5d67
TM		 4940 err = _nfs4_proc_setlk(state, cmd, request);
4941 if (err == -NFS4ERR_DENIED)
4942 err = -EAGAIN;
1da177e4 4943 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4944 err, &exception);
1da177e4
LT		 4945 } while (exception.retry);
4946 return err;
4947}
4948
4949static int
4950nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4951{
4952 struct nfs_open_context *ctx;
4953 struct nfs4_state *state;
4954 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4955 int status;
4956
4957 /* verify open state */
cd3758e3 4958 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4959 state = ctx->state;
4960
4961 if (request->fl_start < 0 || request->fl_end < 0)
4962 return -EINVAL;
4963
d953126a
TM		 4964 if (IS_GETLK(cmd)) {
4965 if (state != NULL)
4966 return nfs4_proc_getlk(state, F_GETLK, request);
4967 return 0;
4968 }
1da177e4
LT		 4969
4970 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4971 return -EINVAL;
4972
d953126a
TM		 4973 if (request->fl_type == F_UNLCK) {
4974 if (state != NULL)
4975 return nfs4_proc_unlck(state, cmd, request);
4976 return 0;
4977 }
1da177e4 4978
d953126a
TM		 4979 if (state == NULL)
4980 return -ENOLCK;
55725513
TM		 4981 /*
4982 * Don't rely on the VFS having checked the file open mode,
4983 * since it won't do this for flock() locks.
4984 */
f44106e2 4985 switch (request->fl_type) {
55725513
TM		 4986 case F_RDLCK:
4987 if (!(filp->f_mode & FMODE_READ))
4988 return -EBADF;
4989 break;
4990 case F_WRLCK:
4991 if (!(filp->f_mode & FMODE_WRITE))
4992 return -EBADF;
4993 }
4994
1da177e4
LT		 4995 do {
4996 status = nfs4_proc_setlk(state, cmd, request);
4997 if ((status != -EAGAIN) || IS_SETLK(cmd))
4998 break;
4999 timeout = nfs4_set_lock_task_retry(timeout);
5000 status = -ERESTARTSYS;
5001 if (signalled())
5002 break;
5003 } while(status < 0);
1da177e4
LT		 5004 return status;
5005}
5006
888e694c
TM		 5007int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5008{
5009 struct nfs_server *server = NFS_SERVER(state->inode);
5010 struct nfs4_exception exception = { };
5011 int err;
5012
5013 err = nfs4_set_lock_state(state, fl);
5014 if (err != 0)
5015 goto out;
5016 do {
afe6c27c 5017 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5018 switch (err) {
5019 default:
a030889a
WAA		 5020 printk(KERN_ERR "NFS: %s: unhandled error "
5021 "%d.\n", __func__, err);
d5122201 5022 case 0:
965b5d67 5023 case -ESTALE:
d5122201 5024 goto out;
d5122201 5025 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5026 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5027 set_bit(NFS_DELEGATED_STATE, &state->flags);
5028 case -NFS4ERR_EXPIRED:
0400a6b0 5029 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5030 err = -EAGAIN;
0400a6b0 5031 goto out;
74e7bb73
RL		 5032 case -NFS4ERR_BADSESSION:
5033 case -NFS4ERR_BADSLOT:
5034 case -NFS4ERR_BAD_HIGH_SLOT:
5035 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5036 case -NFS4ERR_DEADSESSION:
37380e42 5037 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5038 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5039 err = -EAGAIN;
d5122201 5040 goto out;
a1d0b5ee 5041 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5042 case -NFS4ERR_ADMIN_REVOKED:
5043 case -NFS4ERR_BAD_STATEID:
5044 case -NFS4ERR_OPENMODE:
0400a6b0 5045 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5046 err = 0;
5047 goto out;
5048 case -ENOMEM:
5049 case -NFS4ERR_DENIED:
5050 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5051 err = 0;
5052 goto out;
d5122201 5053 }
37380e42 5054 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5055 err = nfs4_handle_exception(server, err, &exception);
5056 } while (exception.retry);
5057out:
5058 return err;
5059}
6b3b5496 5060
cf470c3e
TM		 5061struct nfs_release_lockowner_data {
5062 struct nfs4_lock_state *lsp;
5ae67c4f 5063 struct nfs_server *server;
cf470c3e
TM		 5064 struct nfs_release_lockowner_args args;
5065};
5066
d3c7b7cc
TM		 5067static void nfs4_release_lockowner_release(void *calldata)
5068{
cf470c3e 5069 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5070 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5071 kfree(calldata);
5072}
5073
17280175 5074static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5075 .rpc_release = nfs4_release_lockowner_release,
5076};
5077
cf470c3e 5078int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5079{
5080 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5081 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5082 struct rpc_message msg = {
5083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5084 };
5085
5086 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5087 return -EINVAL;
5088 data = kmalloc(sizeof(*data), GFP_NOFS);
5089 if (!data)
5090 return -ENOMEM;
5091 data->lsp = lsp;
5ae67c4f 5092 data->server = server;
cf470c3e
TM		 5093 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5094 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5095 data->args.lock_owner.s_dev = server->s_dev;
5096 msg.rpc_argp = &data->args;
5097 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5098 return 0;
d3c7b7cc
TM		 5099}
5100
aa1870af
BF		 5101#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5102
64c2ce8b
AK		 5103static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5104 const void *buf, size_t buflen,
5105 int flags, int type)
6b3b5496 5106{
64c2ce8b
AK		 5107 if (strcmp(key, "") != 0)
5108 return -EINVAL;
4b580ee3 5109
64c2ce8b 5110 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5111}
5112
64c2ce8b
AK		 5113static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5114 void *buf, size_t buflen, int type)
6b3b5496 5115{
64c2ce8b
AK		 5116 if (strcmp(key, "") != 0)
5117 return -EINVAL;
aa1870af 5118
64c2ce8b 5119 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5120}
5121
64c2ce8b
AK		 5122static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5123 size_t list_len, const char *name,
5124 size_t name_len, int type)
6b3b5496 5125{
64c2ce8b 5126 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5127
096455a2
BF		 5128 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5129 return 0;
64c2ce8b
AK		 5130
5131 if (list && len <= list_len)
5132 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5133 return len;
6b3b5496
BF		 5134}
5135
533eb461
AA		 5136/*
5137 * nfs_fhget will use either the mounted_on_fileid or the fileid
5138 */
69aaaae1
TM		 5139static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5140{
533eb461
AA		 5141 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5142 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5143 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5144 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5145 return;
5146
5147 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5148 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5149 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5150 fattr->nlink = 2;
5151}
5152
f05d147f
BS		 5153static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5154 const struct qstr *name,
5155 struct nfs4_fs_locations *fs_locations,
5156 struct page *page)
683b57b4
TM		 5157{
5158 struct nfs_server *server = NFS_SERVER(dir);
5159 u32 bitmask[2] = {
361e624f 5160 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5161 };
5162 struct nfs4_fs_locations_arg args = {
5163 .dir_fh = NFS_FH(dir),
c228fd3a 5164 .name = name,
683b57b4
TM		 5165 .page = page,
5166 .bitmask = bitmask,
5167 };
22958463
BH		 5168 struct nfs4_fs_locations_res res = {
5169 .fs_locations = fs_locations,
5170 };
683b57b4
TM		 5171 struct rpc_message msg = {
5172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5173 .rpc_argp = &args,
22958463 5174 .rpc_resp = &res,
683b57b4
TM		 5175 };
5176 int status;
5177
3110ff80 5178 dprintk("%s: start\n", __func__);
533eb461
AA		 5179
5180 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5181 * is not supported */
5182 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5183 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5184 else
5185 bitmask[0] |= FATTR4_WORD0_FILEID;
5186
c228fd3a 5187 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5188 fs_locations->server = server;
830b8e33 5189 fs_locations->nlocations = 0;
f05d147f 5190 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5191 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5192 return status;
5193}
5194
f05d147f
BS		 5195int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5196 const struct qstr *name,
5197 struct nfs4_fs_locations *fs_locations,
5198 struct page *page)
db0a9593
BS		 5199{
5200 struct nfs4_exception exception = { };
5201 int err;
5202 do {
5203 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5204 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5205 &exception);
5206 } while (exception.retry);
5207 return err;
5208}
5209
5a5ea0d4
BS		 5210static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5211{
5212 int status;
5213 struct nfs4_secinfo_arg args = {
5214 .dir_fh = NFS_FH(dir),
5215 .name = name,
5216 };
5217 struct nfs4_secinfo_res res = {
5218 .flavors = flavors,
5219 };
5220 struct rpc_message msg = {
5221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5222 .rpc_argp = &args,
5223 .rpc_resp = &res,
5224 };
5225
5226 dprintk("NFS call secinfo %s\n", name->name);
5227 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5228 dprintk("NFS reply secinfo: %d\n", status);
5229 return status;
5230}
5231
72de53ec
BS		 5232int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5233 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5234{
5235 struct nfs4_exception exception = { };
5236 int err;
5237 do {
5238 err = nfs4_handle_exception(NFS_SERVER(dir),
5239 _nfs4_proc_secinfo(dir, name, flavors),
5240 &exception);
5241 } while (exception.retry);
5242 return err;
5243}
5244
557134a3 5245#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5246/*
5247 * Check the exchange flags returned by the server for invalid flags, having
5248 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5249 * DS flags set.
5250 */
5251static int nfs4_check_cl_exchange_flags(u32 flags)
5252{
5253 if (flags & ~EXCHGID4_FLAG_MASK_R)
5254 goto out_inval;
5255 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5256 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5257 goto out_inval;
5258 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5259 goto out_inval;
5260 return NFS_OK;
5261out_inval:
5262 return -NFS4ERR_INVAL;
5263}
5264
78fe0f41 5265static bool
79d4e1f0
CL		 5266nfs41_same_server_scope(struct nfs41_server_scope *a,
5267 struct nfs41_server_scope *b)
78fe0f41
WAA		 5268{
5269 if (a->server_scope_sz == b->server_scope_sz &&
5270 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5271 return true;
5272
5273 return false;
5274}
5275
7c44f1ae
WAA		 5276/*
5277 * nfs4_proc_bind_conn_to_session()
5278 *
5279 * The 4.1 client currently uses the same TCP connection for the
5280 * fore and backchannel.
5281 */
2cf047c9 5282int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5283{
5284 int status;
5285 struct nfs41_bind_conn_to_session_res res;
5286 struct rpc_message msg = {
5287 .rpc_proc =
5288 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5289 .rpc_argp = clp,
5290 .rpc_resp = &res,
2cf047c9 5291 .rpc_cred = cred,
7c44f1ae
WAA		 5292 };
5293
5294 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5295
5296 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5297 if (unlikely(res.session == NULL)) {
5298 status = -ENOMEM;
5299 goto out;
5300 }
5301
5302 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5303 if (status == 0) {
5304 if (memcmp(res.session->sess_id.data,
5305 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5306 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5307 status = -EIO;
5308 goto out_session;
5309 }
5310 if (res.dir != NFS4_CDFS4_BOTH) {
5311 dprintk("NFS: %s: Unexpected direction from server\n",
5312 __func__);
5313 status = -EIO;
5314 goto out_session;
5315 }
5316 if (res.use_conn_in_rdma_mode) {
5317 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5318 __func__);
5319 status = -EIO;
5320 goto out_session;
5321 }
5322 }
5323out_session:
5324 kfree(res.session);
5325out:
5326 dprintk("<-- %s status= %d\n", __func__, status);
5327 return status;
5328}
5329
99fe60d0
BH		 5330/*
5331 * nfs4_proc_exchange_id()
5332 *
6bbb4ae8
CL		 5333 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5334 *
99fe60d0
BH		 5335 * Since the clientid has expired, all compounds using sessions
5336 * associated with the stale clientid will be returning
5337 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5338 * be in some phase of session reset.
5339 */
4d643d1d 5340int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5341{
5342 nfs4_verifier verifier;
5343 struct nfs41_exchange_id_args args = {
cd93710e 5344 .verifier = &verifier,
99fe60d0 5345 .client = clp,
357f54d6 5346 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5347 };
5348 struct nfs41_exchange_id_res res = {
32b01310 5349 0
99fe60d0
BH		 5350 };
5351 int status;
5352 struct rpc_message msg = {
5353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5354 .rpc_argp = &args,
5355 .rpc_resp = &res,
5356 .rpc_cred = cred,
5357 };
99fe60d0 5358
f092075d 5359 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5360 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5361 sizeof(args.id));
6bbb4ae8
CL		 5362 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5363 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5364 args.id_len, args.id);
99fe60d0 5365
acdeb69d 5366 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5367 GFP_NOFS);
acdeb69d 5368 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5369 status = -ENOMEM;
5370 goto out;
5371 }
78fe0f41 5372
79d4e1f0 5373 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5374 GFP_NOFS);
177313f1 5375 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5376 status = -ENOMEM;
acdeb69d 5377 goto out_server_owner;
abe9a6d5 5378 }
78fe0f41 5379
bbafffd2 5380 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5381 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5382 status = -ENOMEM;
5383 goto out_server_scope;
5384 }
5385
1bd714f2 5386 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5387 if (status == 0)
32b01310 5388 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5389
acdeb69d 5390 if (status == 0) {
32b01310
TM		 5391 clp->cl_clientid = res.clientid;
5392 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5393 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5394 clp->cl_seqid = res.seqid;
5395
acdeb69d
CL		 5396 kfree(clp->cl_serverowner);
5397 clp->cl_serverowner = res.server_owner;
5398 res.server_owner = NULL;
78fe0f41 5399
7d2ed9ac 5400 /* use the most recent implementation id */
59155546
CL		 5401 kfree(clp->cl_implid);
5402 clp->cl_implid = res.impl_id;
7d2ed9ac 5403
177313f1 5404 if (clp->cl_serverscope != NULL &&
79d4e1f0 5405 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5406 res.server_scope)) {
5407 dprintk("%s: server_scope mismatch detected\n",
5408 __func__);
5409 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5410 kfree(clp->cl_serverscope);
5411 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5412 }
5413
177313f1 5414 if (clp->cl_serverscope == NULL) {
79d4e1f0 5415 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5416 goto out;
5417 }
32b01310
TM		 5418 } else
5419 kfree(res.impl_id);
7d2ed9ac 5420
acdeb69d
CL		 5421out_server_owner:
5422 kfree(res.server_owner);
7d2ed9ac 5423out_server_scope:
abe9a6d5
WAA		 5424 kfree(res.server_scope);
5425out:
177313f1 5426 if (clp->cl_implid != NULL)
6bbb4ae8 5427 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5428 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5429 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5430 clp->cl_implid->date.seconds,
5431 clp->cl_implid->date.nseconds);
6bbb4ae8 5432 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5433 return status;
5434}
5435
66245539
TM		 5436static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5437 struct rpc_cred *cred)
5438{
5439 struct rpc_message msg = {
5440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5441 .rpc_argp = clp,
5442 .rpc_cred = cred,
5443 };
5444 int status;
5445
5446 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5447 if (status)
02c67525 5448 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5449 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5450 return status;
5451}
5452
5453static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5454 struct rpc_cred *cred)
5455{
5456 unsigned int loop;
5457 int ret;
5458
5459 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5460 ret = _nfs4_proc_destroy_clientid(clp, cred);
5461 switch (ret) {
5462 case -NFS4ERR_DELAY:
5463 case -NFS4ERR_CLIENTID_BUSY:
5464 ssleep(1);
5465 break;
5466 default:
5467 return ret;
5468 }
5469 }
5470 return 0;
5471}
5472
5473int nfs4_destroy_clientid(struct nfs_client *clp)
5474{
5475 struct rpc_cred *cred;
5476 int ret = 0;
5477
5478 if (clp->cl_mvops->minor_version < 1)
5479 goto out;
5480 if (clp->cl_exchange_flags == 0)
5481 goto out;
05f4c350
CL		 5482 if (clp->cl_preserve_clid)
5483 goto out;
66245539
TM		 5484 cred = nfs4_get_exchange_id_cred(clp);
5485 ret = nfs4_proc_destroy_clientid(clp, cred);
5486 if (cred)
5487 put_rpccred(cred);
5488 switch (ret) {
5489 case 0:
5490 case -NFS4ERR_STALE_CLIENTID:
5491 clp->cl_exchange_flags = 0;
5492 }
5493out:
5494 return ret;
5495}
5496
2050f0cc
AA		 5497struct nfs4_get_lease_time_data {
5498 struct nfs4_get_lease_time_args *args;
5499 struct nfs4_get_lease_time_res *res;
5500 struct nfs_client *clp;
5501};
5502
5503static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5504 void *calldata)
5505{
2050f0cc
AA		 5506 struct nfs4_get_lease_time_data *data =
5507 (struct nfs4_get_lease_time_data *)calldata;
5508
5509 dprintk("--> %s\n", __func__);
5510 /* just setup sequence, do not trigger session recovery
5511 since we're invoked within one */
d9afbd1b
TM		 5512 nfs41_setup_sequence(data->clp->cl_session,
5513 &data->args->la_seq_args,
5514 &data->res->lr_seq_res,
5515 task);
2050f0cc
AA		 5516 dprintk("<-- %s\n", __func__);
5517}
5518
5519/*
5520 * Called from nfs4_state_manager thread for session setup, so don't recover
5521 * from sequence operation or clientid errors.
5522 */
5523static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5524{
5525 struct nfs4_get_lease_time_data *data =
5526 (struct nfs4_get_lease_time_data *)calldata;
5527
5528 dprintk("--> %s\n", __func__);
14516c3a
TM		 5529 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5530 return;
2050f0cc
AA		 5531 switch (task->tk_status) {
5532 case -NFS4ERR_DELAY:
5533 case -NFS4ERR_GRACE:
5534 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5535 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5536 task->tk_status = 0;
a8a4ae3a
AA		 5537 /* fall through */
5538 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5539 rpc_restart_call_prepare(task);
2050f0cc
AA		 5540 return;
5541 }
2050f0cc
AA		 5542 dprintk("<-- %s\n", __func__);
5543}
5544
17280175 5545static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5546 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5547 .rpc_call_done = nfs4_get_lease_time_done,
5548};
5549
5550int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5551{
5552 struct rpc_task *task;
5553 struct nfs4_get_lease_time_args args;
5554 struct nfs4_get_lease_time_res res = {
5555 .lr_fsinfo = fsinfo,
5556 };
5557 struct nfs4_get_lease_time_data data = {
5558 .args = &args,
5559 .res = &res,
5560 .clp = clp,
5561 };
5562 struct rpc_message msg = {
5563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5564 .rpc_argp = &args,
5565 .rpc_resp = &res,
5566 };
5567 struct rpc_task_setup task_setup = {
5568 .rpc_client = clp->cl_rpcclient,
5569 .rpc_message = &msg,
5570 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5571 .callback_data = &data,
5572 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5573 };
5574 int status;
5575
9d12b216 5576 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5577 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5578 dprintk("--> %s\n", __func__);
5579 task = rpc_run_task(&task_setup);
5580
5581 if (IS_ERR(task))
5582 status = PTR_ERR(task);
5583 else {
5584 status = task->tk_status;
5585 rpc_put_task(task);
5586 }
5587 dprintk("<-- %s return %d\n", __func__, status);
5588
5589 return status;
5590}
5591
fc931582
AA		 5592/*
5593 * Initialize the values to be used by the client in CREATE_SESSION
5594 * If nfs4_init_session set the fore channel request and response sizes,
5595 * use them.
5596 *
5597 * Set the back channel max_resp_sz_cached to zero to force the client to
5598 * always set csa_cachethis to FALSE because the current implementation
5599 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5600 */
5601static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5602{
5603 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5604 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5605 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5606
5607 if (mxrqst_sz == 0)
5608 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5609 if (mxresp_sz == 0)
5610 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5611 /* Fore channel attributes */
fc931582
AA		 5612 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5613 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5614 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5615 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5616
5617 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5618 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5619 __func__,
5620 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5621 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5622
5623 /* Back channel attributes */
fc931582
AA		 5624 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5625 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5626 args->bc_attrs.max_resp_sz_cached = 0;
5627 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5628 args->bc_attrs.max_reqs = 1;
5629
5630 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5631 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5632 __func__,
5633 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5634 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5635 args->bc_attrs.max_reqs);
5636}
5637
43c2e885 5638static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5639{
43c2e885
BF		 5640 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5641 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5642
43c2e885
BF		 5643 if (rcvd->max_resp_sz > sent->max_resp_sz)
5644 return -EINVAL;
5645 /*
5646 * Our requested max_ops is the minimum we need; we're not
5647 * prepared to break up compounds into smaller pieces than that.
5648 * So, no point even trying to continue if the server won't
5649 * cooperate:
5650 */
5651 if (rcvd->max_ops < sent->max_ops)
5652 return -EINVAL;
5653 if (rcvd->max_reqs == 0)
5654 return -EINVAL;
b4b9a0c1
VG		 5655 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5656 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5657 return 0;
8d35301d
AA		 5658}
5659
43c2e885
BF		 5660static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5661{
5662 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5663 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5664
43c2e885
BF		 5665 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5666 return -EINVAL;
5667 if (rcvd->max_resp_sz < sent->max_resp_sz)
5668 return -EINVAL;
5669 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5670 return -EINVAL;
5671 /* These would render the backchannel useless: */
b4b9a0c1 5672 if (rcvd->max_ops != sent->max_ops)
43c2e885 5673 return -EINVAL;
b4b9a0c1 5674 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5675 return -EINVAL;
5676 return 0;
5677}
8d35301d 5678
8d35301d
AA		 5679static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5680 struct nfs4_session *session)
5681{
43c2e885 5682 int ret;
8d35301d 5683
43c2e885
BF		 5684 ret = nfs4_verify_fore_channel_attrs(args, session);
5685 if (ret)
5686 return ret;
5687 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5688}
5689
848f5bda
TM		 5690static int _nfs4_proc_create_session(struct nfs_client *clp,
5691 struct rpc_cred *cred)
fc931582
AA		 5692{
5693 struct nfs4_session *session = clp->cl_session;
5694 struct nfs41_create_session_args args = {
5695 .client = clp,
5696 .cb_program = NFS4_CALLBACK,
5697 };
5698 struct nfs41_create_session_res res = {
5699 .client = clp,
5700 };
5701 struct rpc_message msg = {
5702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5703 .rpc_argp = &args,
5704 .rpc_resp = &res,
848f5bda 5705 .rpc_cred = cred,
fc931582
AA		 5706 };
5707 int status;
5708
5709 nfs4_init_channel_attrs(&args);
0f91421e 5710 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5711
1bd714f2 5712 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5713
43095d39 5714 if (!status) {
8d35301d
AA		 5715 /* Verify the session's negotiated channel_attrs values */
5716 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5717 /* Increment the clientid slot sequence id */
5718 clp->cl_seqid++;
5719 }
5720
5721 return status;
5722}
5723
5724/*
5725 * Issues a CREATE_SESSION operation to the server.
5726 * It is the responsibility of the caller to verify the session is
5727 * expired before calling this routine.
5728 */
848f5bda 5729int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5730{
5731 int status;
5732 unsigned *ptr;
fc931582
AA		 5733 struct nfs4_session *session = clp->cl_session;
5734
5735 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5736
848f5bda 5737 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5738 if (status)
5739 goto out;
5740
aacd5537
AA		 5741 /* Init or reset the session slot tables */
5742 status = nfs4_setup_session_slot_tables(session);
5743 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5744 if (status)
5745 goto out;
5746
5747 ptr = (unsigned *)&session->sess_id.data[0];
5748 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5749 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5750out:
5751 dprintk("<-- %s\n", __func__);
5752 return status;
5753}
5754
0f3e66c6
AA		 5755/*
5756 * Issue the over-the-wire RPC DESTROY_SESSION.
5757 * The caller must serialize access to this routine.
5758 */
848f5bda
TM		 5759int nfs4_proc_destroy_session(struct nfs4_session *session,
5760 struct rpc_cred *cred)
0f3e66c6 5761{
848f5bda
TM		 5762 struct rpc_message msg = {
5763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5764 .rpc_argp = session,
5765 .rpc_cred = cred,
5766 };
0f3e66c6 5767 int status = 0;
0f3e66c6
AA		 5768
5769 dprintk("--> nfs4_proc_destroy_session\n");
5770
5771 /* session is still being setup */
5772 if (session->clp->cl_cons_state != NFS_CS_READY)
5773 return status;
5774
1bd714f2 5775 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5776
5777 if (status)
08106ac7 5778 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5779 "Session has been destroyed regardless...\n", status);
5780
5781 dprintk("<-- nfs4_proc_destroy_session\n");
5782 return status;
5783}
5784
fc01cea9
AA		 5785/*
5786 * Renew the cl_session lease.
5787 */
d5f8d3fe
TM		 5788struct nfs4_sequence_data {
5789 struct nfs_client *clp;
5790 struct nfs4_sequence_args args;
5791 struct nfs4_sequence_res res;
5792};
5793
dc96aef9
AB		 5794static void nfs41_sequence_release(void *data)
5795{
d5f8d3fe
TM		 5796 struct nfs4_sequence_data *calldata = data;
5797 struct nfs_client *clp = calldata->clp;
dc96aef9 5798
7135840f
AB		 5799 if (atomic_read(&clp->cl_count) > 1)
5800 nfs4_schedule_state_renewal(clp);
5801 nfs_put_client(clp);
d5f8d3fe 5802 kfree(calldata);
dc96aef9
AB		 5803}
5804
aa5190d0
TM		 5805static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5806{
5807 switch(task->tk_status) {
5808 case -NFS4ERR_DELAY:
aa5190d0
TM		 5809 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5810 return -EAGAIN;
5811 default:
0400a6b0 5812 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5813 }
5814 return 0;
5815}
5816
dc96aef9 5817static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5818{
d5f8d3fe
TM		 5819 struct nfs4_sequence_data *calldata = data;
5820 struct nfs_client *clp = calldata->clp;
fc01cea9 5821
14516c3a
TM		 5822 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5823 return;
fc01cea9
AA		 5824
5825 if (task->tk_status < 0) {
5826 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5827 if (atomic_read(&clp->cl_count) == 1)
5828 goto out;
fc01cea9 5829
aa5190d0
TM		 5830 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5831 rpc_restart_call_prepare(task);
fc01cea9
AA		 5832 return;
5833 }
5834 }
fc01cea9 5835 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5836out:
fc01cea9
AA		 5837 dprintk("<-- %s\n", __func__);
5838}
5839
5840static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5841{
d5f8d3fe
TM		 5842 struct nfs4_sequence_data *calldata = data;
5843 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5844 struct nfs4_sequence_args *args;
5845 struct nfs4_sequence_res *res;
5846
fc01cea9
AA		 5847 args = task->tk_msg.rpc_argp;
5848 res = task->tk_msg.rpc_resp;
5849
d9afbd1b 5850 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5851}
5852
5853static const struct rpc_call_ops nfs41_sequence_ops = {
5854 .rpc_call_done = nfs41_sequence_call_done,
5855 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5856 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5857};
5858
8fe72bac
TM		 5859static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5860 struct rpc_cred *cred,
5861 bool is_privileged)
fc01cea9 5862{
d5f8d3fe 5863 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5864 struct rpc_message msg = {
5865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5866 .rpc_cred = cred,
5867 };
71ac6da9
TM		 5868 struct rpc_task_setup task_setup_data = {
5869 .rpc_client = clp->cl_rpcclient,
5870 .rpc_message = &msg,
8fe72bac 5871 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5872 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5873 };
fc01cea9 5874
7135840f 5875 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5876 return ERR_PTR(-EIO);
dfb4f309 5877 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5878 if (calldata == NULL) {
7135840f 5879 nfs_put_client(clp);
71ac6da9 5880 return ERR_PTR(-ENOMEM);
fc01cea9 5881 }
9d12b216 5882 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5883 if (is_privileged)
5884 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5885 msg.rpc_argp = &calldata->args;
5886 msg.rpc_resp = &calldata->res;
5887 calldata->clp = clp;
71ac6da9 5888 task_setup_data.callback_data = calldata;
fc01cea9 5889
71ac6da9
TM		 5890 return rpc_run_task(&task_setup_data);
5891}
5892
2f60ea6b 5893static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5894{
5895 struct rpc_task *task;
5896 int ret = 0;
5897
2f60ea6b
TM		 5898 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5899 return 0;
8fe72bac 5900 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5901 if (IS_ERR(task))
5902 ret = PTR_ERR(task);
5903 else
bf294b41 5904 rpc_put_task_async(task);
71ac6da9
TM		 5905 dprintk("<-- %s status=%d\n", __func__, ret);
5906 return ret;
5907}
5908
5909static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5910{
5911 struct rpc_task *task;
5912 int ret;
5913
8fe72bac 5914 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5915 if (IS_ERR(task)) {
5916 ret = PTR_ERR(task);
5917 goto out;
5918 }
5919 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5920 if (!ret) {
5921 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5922
5923 if (task->tk_status == 0)
5924 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5925 ret = task->tk_status;
b4410c2f 5926 }
71ac6da9
TM		 5927 rpc_put_task(task);
5928out:
5929 dprintk("<-- %s status=%d\n", __func__, ret);
5930 return ret;
fc01cea9
AA		 5931}
5932
fce5c838
RL		 5933struct nfs4_reclaim_complete_data {
5934 struct nfs_client *clp;
5935 struct nfs41_reclaim_complete_args arg;
5936 struct nfs41_reclaim_complete_res res;
5937};
5938
5939static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5940{
5941 struct nfs4_reclaim_complete_data *calldata = data;
5942
d9afbd1b
TM		 5943 nfs41_setup_sequence(calldata->clp->cl_session,
5944 &calldata->arg.seq_args,
5945 &calldata->res.seq_res,
5946 task);
fce5c838
RL		 5947}
5948
aa5190d0
TM		 5949static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5950{
5951 switch(task->tk_status) {
5952 case 0:
5953 case -NFS4ERR_COMPLETE_ALREADY:
5954 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5955 break;
5956 case -NFS4ERR_DELAY:
aa5190d0 5957 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5958 /* fall through */
5959 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5960 return -EAGAIN;
5961 default:
0400a6b0 5962 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5963 }
5964 return 0;
5965}
5966
fce5c838
RL		 5967static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5968{
5969 struct nfs4_reclaim_complete_data *calldata = data;
5970 struct nfs_client *clp = calldata->clp;
5971 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5972
5973 dprintk("--> %s\n", __func__);
14516c3a
TM		 5974 if (!nfs41_sequence_done(task, res))
5975 return;
fce5c838 5976
aa5190d0
TM		 5977 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5978 rpc_restart_call_prepare(task);
5979 return;
5980 }
fce5c838
RL		 5981 dprintk("<-- %s\n", __func__);
5982}
5983
5984static void nfs4_free_reclaim_complete_data(void *data)
5985{
5986 struct nfs4_reclaim_complete_data *calldata = data;
5987
5988 kfree(calldata);
5989}
5990
5991static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5992 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5993 .rpc_call_done = nfs4_reclaim_complete_done,
5994 .rpc_release = nfs4_free_reclaim_complete_data,
5995};
5996
5997/*
5998 * Issue a global reclaim complete.
5999 */
6000static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6001{
6002 struct nfs4_reclaim_complete_data *calldata;
6003 struct rpc_task *task;
6004 struct rpc_message msg = {
6005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6006 };
6007 struct rpc_task_setup task_setup_data = {
6008 .rpc_client = clp->cl_rpcclient,
6009 .rpc_message = &msg,
6010 .callback_ops = &nfs4_reclaim_complete_call_ops,
6011 .flags = RPC_TASK_ASYNC,
6012 };
6013 int status = -ENOMEM;
6014
6015 dprintk("--> %s\n", __func__);
8535b2be 6016 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6017 if (calldata == NULL)
6018 goto out;
6019 calldata->clp = clp;
6020 calldata->arg.one_fs = 0;
fce5c838 6021
9d12b216 6022 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6023 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6024 msg.rpc_argp = &calldata->arg;
6025 msg.rpc_resp = &calldata->res;
6026 task_setup_data.callback_data = calldata;
6027 task = rpc_run_task(&task_setup_data);
acf82b85 6028 if (IS_ERR(task)) {
fce5c838 6029 status = PTR_ERR(task);
acf82b85
DC		 6030 goto out;
6031 }
c34c32ea
AA		 6032 status = nfs4_wait_for_completion_rpc_task(task);
6033 if (status == 0)
6034 status = task->tk_status;
fce5c838 6035 rpc_put_task(task);
acf82b85 6036 return 0;
fce5c838
RL		 6037out:
6038 dprintk("<-- %s status=%d\n", __func__, status);
6039 return status;
6040}
b1f69b75
AA		 6041
6042static void
6043nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6044{
6045 struct nfs4_layoutget *lgp = calldata;
c31663d4 6046 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6047 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6048
6049 dprintk("--> %s\n", __func__);
c31663d4
FI		 6050 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6051 * right now covering the LAYOUTGET we are about to send.
6052 * However, that is not so catastrophic, and there seems
6053 * to be no way to prevent it completely.
6054 */
6ba7db34 6055 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6056 &lgp->res.seq_res, task))
b1f69b75 6057 return;
cf7d63f1
FI		 6058 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6059 NFS_I(lgp->args.inode)->layout,
6060 lgp->args.ctx->state)) {
6061 rpc_exit(task, NFS4_OK);
cf7d63f1 6062 }
b1f69b75
AA		 6063}
6064
6065static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6066{
6067 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6068 struct inode *inode = lgp->args.inode;
6069 struct nfs_server *server = NFS_SERVER(inode);
6070 struct pnfs_layout_hdr *lo;
6071 struct nfs4_state *state = NULL;
30005121 6072 unsigned long timeo, giveup;
b1f69b75
AA		 6073
6074 dprintk("--> %s\n", __func__);
6075
6ba7db34 6076 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6077 goto out;
b1f69b75
AA		 6078
6079 switch (task->tk_status) {
6080 case 0:
ee314c2a 6081 goto out;
b1f69b75
AA		 6082 case -NFS4ERR_LAYOUTTRYLATER:
6083 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6084 timeo = rpc_get_timeout(task->tk_client);
6085 giveup = lgp->args.timestamp + timeo;
6086 if (time_after(giveup, jiffies))
6087 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6088 break;
6089 case -NFS4ERR_EXPIRED:
6090 case -NFS4ERR_BAD_STATEID:
6091 spin_lock(&inode->i_lock);
6092 lo = NFS_I(inode)->layout;
6093 if (!lo || list_empty(&lo->plh_segs)) {
6094 spin_unlock(&inode->i_lock);
6095 /* If the open stateid was bad, then recover it. */
6096 state = lgp->args.ctx->state;
6097 } else {
6098 LIST_HEAD(head);
6099
6100 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6101 spin_unlock(&inode->i_lock);
6102 /* Mark the bad layout state as invalid, then
6103 * retry using the open stateid. */
6104 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6105 }
6106 }
ee314c2a
TM		 6107 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6108 rpc_restart_call_prepare(task);
6109out:
b1f69b75
AA		 6110 dprintk("<-- %s\n", __func__);
6111}
6112
8554116e
IK		 6113static size_t max_response_pages(struct nfs_server *server)
6114{
6115 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6116 return nfs_page_array_len(0, max_resp_sz);
6117}
6118
6119static void nfs4_free_pages(struct page **pages, size_t size)
6120{
6121 int i;
6122
6123 if (!pages)
6124 return;
6125
6126 for (i = 0; i < size; i++) {
6127 if (!pages[i])
6128 break;
6129 __free_page(pages[i]);
6130 }
6131 kfree(pages);
6132}
6133
6134static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6135{
6136 struct page **pages;
6137 int i;
6138
6139 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6140 if (!pages) {
6141 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6142 return NULL;
6143 }
6144
6145 for (i = 0; i < size; i++) {
6146 pages[i] = alloc_page(gfp_flags);
6147 if (!pages[i]) {
6148 dprintk("%s: failed to allocate page\n", __func__);
6149 nfs4_free_pages(pages, size);
6150 return NULL;
6151 }
6152 }
6153
6154 return pages;
6155}
6156
b1f69b75
AA		 6157static void nfs4_layoutget_release(void *calldata)
6158{
6159 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6160 struct inode *inode = lgp->args.inode;
6161 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6162 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6163
6164 dprintk("--> %s\n", __func__);
8554116e 6165 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6166 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6167 put_nfs_open_context(lgp->args.ctx);
6168 kfree(calldata);
6169 dprintk("<-- %s\n", __func__);
6170}
6171
6172static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6173 .rpc_call_prepare = nfs4_layoutget_prepare,
6174 .rpc_call_done = nfs4_layoutget_done,
6175 .rpc_release = nfs4_layoutget_release,
6176};
6177
a0b0a6e3
TM		 6178struct pnfs_layout_segment *
6179nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6180{
a47970ff
WAA		 6181 struct inode *inode = lgp->args.inode;
6182 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6183 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6184 struct rpc_task *task;
6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6187 .rpc_argp = &lgp->args,
6188 .rpc_resp = &lgp->res,
6189 };
6190 struct rpc_task_setup task_setup_data = {
6191 .rpc_client = server->client,
6192 .rpc_message = &msg,
6193 .callback_ops = &nfs4_layoutget_call_ops,
6194 .callback_data = lgp,
6195 .flags = RPC_TASK_ASYNC,
6196 };
a0b0a6e3 6197 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6198 int status = 0;
6199
6200 dprintk("--> %s\n", __func__);
6201
8554116e
IK		 6202 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6203 if (!lgp->args.layout.pages) {
6204 nfs4_layoutget_release(lgp);
a0b0a6e3 6205 return ERR_PTR(-ENOMEM);
8554116e
IK		 6206 }
6207 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6208 lgp->args.timestamp = jiffies;
8554116e 6209
35124a09 6210 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6211 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6212 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6213
6214 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6215 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6216
b1f69b75
AA		 6217 task = rpc_run_task(&task_setup_data);
6218 if (IS_ERR(task))
a0b0a6e3 6219 return ERR_CAST(task);
b1f69b75 6220 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6221 if (status == 0)
6222 status = task->tk_status;
085b7a45
WAA		 6223 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6224 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6225 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6226 rpc_put_task(task);
6227 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6228 if (status)
6229 return ERR_PTR(status);
6230 return lseg;
b1f69b75
AA		 6231}
6232
cbe82603
BH		 6233static void
6234nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6235{
6236 struct nfs4_layoutreturn *lrp = calldata;
6237
6238 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6239 nfs41_setup_sequence(lrp->clp->cl_session,
6240 &lrp->args.seq_args,
6241 &lrp->res.seq_res,
6242 task);
cbe82603
BH		 6243}
6244
6245static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6246{
6247 struct nfs4_layoutreturn *lrp = calldata;
6248 struct nfs_server *server;
6249
6250 dprintk("--> %s\n", __func__);
6251
6ba7db34 6252 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6253 return;
6254
6255 server = NFS_SERVER(lrp->args.inode);
6256 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6257 rpc_restart_call_prepare(task);
cbe82603
BH		 6258 return;
6259 }
cbe82603
BH		 6260 dprintk("<-- %s\n", __func__);
6261}
6262
6263static void nfs4_layoutreturn_release(void *calldata)
6264{
6265 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6266 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6267
6268 dprintk("--> %s\n", __func__);
849b286f
TM		 6269 spin_lock(&lo->plh_inode->i_lock);
6270 if (lrp->res.lrs_present)
6271 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6272 lo->plh_block_lgets--;
6273 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6274 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6275 kfree(calldata);
6276 dprintk("<-- %s\n", __func__);
6277}
6278
6279static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6280 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6281 .rpc_call_done = nfs4_layoutreturn_done,
6282 .rpc_release = nfs4_layoutreturn_release,
6283};
6284
6285int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6286{
6287 struct rpc_task *task;
6288 struct rpc_message msg = {
6289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6290 .rpc_argp = &lrp->args,
6291 .rpc_resp = &lrp->res,
6292 };
6293 struct rpc_task_setup task_setup_data = {
6294 .rpc_client = lrp->clp->cl_rpcclient,
6295 .rpc_message = &msg,
6296 .callback_ops = &nfs4_layoutreturn_call_ops,
6297 .callback_data = lrp,
6298 };
6299 int status;
6300
6301 dprintk("--> %s\n", __func__);
9d12b216 6302 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6303 task = rpc_run_task(&task_setup_data);
6304 if (IS_ERR(task))
6305 return PTR_ERR(task);
6306 status = task->tk_status;
6307 dprintk("<-- %s status=%d\n", __func__, status);
6308 rpc_put_task(task);
6309 return status;
6310}
6311
7f11d8d3
AA		 6312/*
6313 * Retrieve the list of Data Server devices from the MDS.
6314 */
6315static int _nfs4_getdevicelist(struct nfs_server *server,
6316 const struct nfs_fh *fh,
6317 struct pnfs_devicelist *devlist)
6318{
6319 struct nfs4_getdevicelist_args args = {
6320 .fh = fh,
6321 .layoutclass = server->pnfs_curr_ld->id,
6322 };
6323 struct nfs4_getdevicelist_res res = {
6324 .devlist = devlist,
6325 };
6326 struct rpc_message msg = {
6327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6328 .rpc_argp = &args,
6329 .rpc_resp = &res,
6330 };
6331 int status;
6332
6333 dprintk("--> %s\n", __func__);
6334 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6335 &res.seq_res, 0);
6336 dprintk("<-- %s status=%d\n", __func__, status);
6337 return status;
6338}
6339
6340int nfs4_proc_getdevicelist(struct nfs_server *server,
6341 const struct nfs_fh *fh,
6342 struct pnfs_devicelist *devlist)
6343{
6344 struct nfs4_exception exception = { };
6345 int err;
6346
6347 do {
6348 err = nfs4_handle_exception(server,
6349 _nfs4_getdevicelist(server, fh, devlist),
6350 &exception);
6351 } while (exception.retry);
6352
6353 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6354 err, devlist->num_devs);
6355
6356 return err;
6357}
6358EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6359
b1f69b75
AA		 6360static int
6361_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6362{
6363 struct nfs4_getdeviceinfo_args args = {
6364 .pdev = pdev,
6365 };
6366 struct nfs4_getdeviceinfo_res res = {
6367 .pdev = pdev,
6368 };
6369 struct rpc_message msg = {
6370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6371 .rpc_argp = &args,
6372 .rpc_resp = &res,
6373 };
6374 int status;
6375
6376 dprintk("--> %s\n", __func__);
7c513058 6377 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6378 dprintk("<-- %s status=%d\n", __func__, status);
6379
6380 return status;
6381}
6382
6383int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6384{
6385 struct nfs4_exception exception = { };
6386 int err;
6387
6388 do {
6389 err = nfs4_handle_exception(server,
6390 _nfs4_proc_getdeviceinfo(server, pdev),
6391 &exception);
6392 } while (exception.retry);
6393 return err;
6394}
6395EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6396
863a3c6c
AA		 6397static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6398{
6399 struct nfs4_layoutcommit_data *data = calldata;
6400 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6401 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6402
d9afbd1b
TM		 6403 nfs41_setup_sequence(session,
6404 &data->args.seq_args,
6405 &data->res.seq_res,
6406 task);
863a3c6c
AA		 6407}
6408
6409static void
6410nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6411{
6412 struct nfs4_layoutcommit_data *data = calldata;
6413 struct nfs_server *server = NFS_SERVER(data->args.inode);
6414
6ba7db34 6415 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6416 return;
6417
6418 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6419 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6420 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6421 case -NFS4ERR_BADLAYOUT: /* no layout */
6422 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6423 task->tk_status = 0;
e59d27e0
TM		 6424 break;
6425 case 0:
863a3c6c
AA		 6426 nfs_post_op_update_inode_force_wcc(data->args.inode,
6427 data->res.fattr);
e59d27e0
TM		 6428 break;
6429 default:
6430 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6431 rpc_restart_call_prepare(task);
6432 return;
6433 }
6434 }
863a3c6c
AA		 6435}
6436
6437static void nfs4_layoutcommit_release(void *calldata)
6438{
6439 struct nfs4_layoutcommit_data *data = calldata;
6440
db29c089 6441 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6442 put_rpccred(data->cred);
6443 kfree(data);
6444}
6445
6446static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6447 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6448 .rpc_call_done = nfs4_layoutcommit_done,
6449 .rpc_release = nfs4_layoutcommit_release,
6450};
6451
6452int
ef311537 6453nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6454{
6455 struct rpc_message msg = {
6456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6457 .rpc_argp = &data->args,
6458 .rpc_resp = &data->res,
6459 .rpc_cred = data->cred,
6460 };
6461 struct rpc_task_setup task_setup_data = {
6462 .task = &data->task,
6463 .rpc_client = NFS_CLIENT(data->args.inode),
6464 .rpc_message = &msg,
6465 .callback_ops = &nfs4_layoutcommit_ops,
6466 .callback_data = data,
6467 .flags = RPC_TASK_ASYNC,
6468 };
6469 struct rpc_task *task;
6470 int status = 0;
6471
6472 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6473 "lbw: %llu inode %lu\n",
6474 data->task.tk_pid, sync,
6475 data->args.lastbytewritten,
6476 data->args.inode->i_ino);
6477
9d12b216 6478 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6479 task = rpc_run_task(&task_setup_data);
6480 if (IS_ERR(task))
6481 return PTR_ERR(task);
ef311537 6482 if (sync == false)
863a3c6c
AA		 6483 goto out;
6484 status = nfs4_wait_for_completion_rpc_task(task);
6485 if (status != 0)
6486 goto out;
6487 status = task->tk_status;
6488out:
6489 dprintk("%s: status %d\n", __func__, status);
6490 rpc_put_task(task);
6491 return status;
6492}
fca78d6d
BS		 6493
6494static int
6495_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6496 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6497{
6498 struct nfs41_secinfo_no_name_args args = {
6499 .style = SECINFO_STYLE_CURRENT_FH,
6500 };
6501 struct nfs4_secinfo_res res = {
6502 .flavors = flavors,
6503 };
6504 struct rpc_message msg = {
6505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6506 .rpc_argp = &args,
6507 .rpc_resp = &res,
6508 };
6509 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6510}
6511
6512static int
6513nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6514 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6515{
6516 struct nfs4_exception exception = { };
6517 int err;
6518 do {
6519 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6520 switch (err) {
6521 case 0:
6522 case -NFS4ERR_WRONGSEC:
6523 case -NFS4ERR_NOTSUPP:
05e9cfb4 6524 goto out;
fca78d6d
BS		 6525 default:
6526 err = nfs4_handle_exception(server, err, &exception);
6527 }
6528 } while (exception.retry);
05e9cfb4 6529out:
fca78d6d
BS		 6530 return err;
6531}
6532
6533static int
6534nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6535 struct nfs_fsinfo *info)
6536{
6537 int err;
6538 struct page *page;
6539 rpc_authflavor_t flavor;
6540 struct nfs4_secinfo_flavors *flavors;
6541
6542 page = alloc_page(GFP_KERNEL);
6543 if (!page) {
6544 err = -ENOMEM;
6545 goto out;
6546 }
6547
6548 flavors = page_address(page);
6549 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6550
6551 /*
6552 * Fall back on "guess and check" method if
6553 * the server doesn't support SECINFO_NO_NAME
6554 */
6555 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6556 err = nfs4_find_root_sec(server, fhandle, info);
6557 goto out_freepage;
6558 }
6559 if (err)
6560 goto out_freepage;
6561
6562 flavor = nfs_find_best_sec(flavors);
6563 if (err == 0)
6564 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6565
6566out_freepage:
6567 put_page(page);
6568 if (err == -EACCES)
6569 return -EPERM;
6570out:
6571 return err;
6572}
1cab0652
BS		 6573
6574static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6575{
6576 int status;
6577 struct nfs41_test_stateid_args args = {
1cab0652 6578 .stateid = stateid,
7d974794
BS		 6579 };
6580 struct nfs41_test_stateid_res res;
6581 struct rpc_message msg = {
6582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6583 .rpc_argp = &args,
6584 .rpc_resp = &res,
6585 };
1cab0652 6586
38527b15 6587 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6588 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6589 nfs4_set_sequence_privileged(&args.seq_args);
6590 status = nfs4_call_sync_sequence(server->client, server, &msg,
6591 &args.seq_args, &res.seq_res);
38527b15
CL		 6592 if (status != NFS_OK) {
6593 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6594 return status;
38527b15
CL		 6595 }
6596 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6597 return -res.status;
7d974794
BS		 6598}
6599
38527b15
CL		 6600/**
6601 * nfs41_test_stateid - perform a TEST_STATEID operation
6602 *
6603 * @server: server / transport on which to perform the operation
6604 * @stateid: state ID to test
6605 *
6606 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6607 * Otherwise a negative NFS4ERR value is returned if the operation
6608 * failed or the state ID is not currently valid.
6609 */
1cab0652 6610static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6611{
6612 struct nfs4_exception exception = { };
6613 int err;
6614 do {
377e507d
CL		 6615 err = _nfs41_test_stateid(server, stateid);
6616 if (err != -NFS4ERR_DELAY)
6617 break;
6618 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6619 } while (exception.retry);
6620 return err;
6621}
9aeda35f 6622
1cab0652 6623static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6624{
9aeda35f 6625 struct nfs41_free_stateid_args args = {
1cab0652 6626 .stateid = stateid,
9aeda35f
BS		 6627 };
6628 struct nfs41_free_stateid_res res;
6629 struct rpc_message msg = {
6630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6631 .rpc_argp = &args,
6632 .rpc_resp = &res,
6633 };
38527b15 6634 int status;
9aeda35f 6635
38527b15 6636 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6637 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6638 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6639 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6640 &args.seq_args, &res.seq_res);
38527b15
CL		 6641 dprintk("NFS reply free_stateid: %d\n", status);
6642 return status;
9aeda35f
BS		 6643}
6644
38527b15
CL		 6645/**
6646 * nfs41_free_stateid - perform a FREE_STATEID operation
6647 *
6648 * @server: server / transport on which to perform the operation
6649 * @stateid: state ID to release
6650 *
6651 * Returns NFS_OK if the server freed "stateid". Otherwise a
6652 * negative NFS4ERR value is returned.
6653 */
1cab0652 6654static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6655{
6656 struct nfs4_exception exception = { };
6657 int err;
6658 do {
377e507d
CL		 6659 err = _nfs4_free_stateid(server, stateid);
6660 if (err != -NFS4ERR_DELAY)
6661 break;
6662 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6663 } while (exception.retry);
6664 return err;
6665}
36281caa
TM		 6666
6667static bool nfs41_match_stateid(const nfs4_stateid *s1,
6668 const nfs4_stateid *s2)
6669{
2d2f24ad 6670 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6671 return false;
6672
2d2f24ad 6673 if (s1->seqid == s2->seqid)
36281caa 6674 return true;
2d2f24ad 6675 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6676 return true;
6677
6678 return false;
6679}
6680
557134a3
AA		 6681#endif /* CONFIG_NFS_V4_1 */
6682
36281caa
TM		 6683static bool nfs4_match_stateid(const nfs4_stateid *s1,
6684 const nfs4_stateid *s2)
6685{
f597c537 6686 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6687}
6688
6689
17280175 6690static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6691 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6692 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6693 .recover_open = nfs4_open_reclaim,
6694 .recover_lock = nfs4_lock_reclaim,
591d71cb 6695 .establish_clid = nfs4_init_clientid,
90a16617 6696 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6697 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6698};
6699
591d71cb 6700#if defined(CONFIG_NFS_V4_1)
17280175 6701static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6702 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6703 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6704 .recover_open = nfs4_open_reclaim,
6705 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6706 .establish_clid = nfs41_init_clientid,
b4b82607 6707 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6708 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6709 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6710};
6711#endif /* CONFIG_NFS_V4_1 */
6712
17280175 6713static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6714 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6715 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6716 .recover_open = nfs4_open_expired,
6717 .recover_lock = nfs4_lock_expired,
6718 .establish_clid = nfs4_init_clientid,
90a16617 6719 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6720};
6721
6722#if defined(CONFIG_NFS_V4_1)
17280175 6723static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6724 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6725 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6726 .recover_open = nfs41_open_expired,
6727 .recover_lock = nfs41_lock_expired,
4d643d1d 6728 .establish_clid = nfs41_init_clientid,
b4b82607 6729 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6730};
591d71cb 6731#endif /* CONFIG_NFS_V4_1 */
1da177e4 6732
17280175 6733static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6734 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6735 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6736 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6737};
6738
6739#if defined(CONFIG_NFS_V4_1)
17280175 6740static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6741 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6742 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6743 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6744};
6745#endif
6746
97dc1359
TM		 6747static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6748 .minor_version = 0,
6749 .call_sync = _nfs4_call_sync,
36281caa 6750 .match_stateid = nfs4_match_stateid,
fca78d6d 6751 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6752 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6753 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6754 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6755};
6756
6757#if defined(CONFIG_NFS_V4_1)
6758static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6759 .minor_version = 1,
104287cd 6760 .call_sync = nfs4_call_sync_sequence,
36281caa 6761 .match_stateid = nfs41_match_stateid,
fca78d6d 6762 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6763 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6764 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6765 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6766};
6767#endif
6768
97dc1359
TM		 6769const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6770 [0] = &nfs_v4_0_minor_ops,
6771#if defined(CONFIG_NFS_V4_1)
6772 [1] = &nfs_v4_1_minor_ops,
6773#endif
6774};
6775
73a79706
BS		 6776const struct inode_operations nfs4_dir_inode_operations = {
6777 .create = nfs_create,
6778 .lookup = nfs_lookup,
6779 .atomic_open = nfs_atomic_open,
6780 .link = nfs_link,
6781 .unlink = nfs_unlink,
6782 .symlink = nfs_symlink,
6783 .mkdir = nfs_mkdir,
6784 .rmdir = nfs_rmdir,
6785 .mknod = nfs_mknod,
6786 .rename = nfs_rename,
6787 .permission = nfs_permission,
6788 .getattr = nfs_getattr,
6789 .setattr = nfs_setattr,
6790 .getxattr = generic_getxattr,
6791 .setxattr = generic_setxattr,
6792 .listxattr = generic_listxattr,
6793 .removexattr = generic_removexattr,
6794};
6795
92e1d5be 6796static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6797 .permission = nfs_permission,
6798 .getattr = nfs_getattr,
6799 .setattr = nfs_setattr,
64c2ce8b
AK		 6800 .getxattr = generic_getxattr,
6801 .setxattr = generic_setxattr,
6802 .listxattr = generic_listxattr,
6803 .removexattr = generic_removexattr,
6b3b5496
BF		 6804};
6805
509de811 6806const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6807 .version = 4, /* protocol version */
6808 .dentry_ops = &nfs4_dentry_operations,
6809 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6810 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6811 .file_ops = &nfs4_file_operations,
1da177e4 6812 .getroot = nfs4_proc_get_root,
281cad46 6813 .submount = nfs4_submount,
ff9099f2 6814 .try_mount = nfs4_try_mount,
1da177e4
LT		 6815 .getattr = nfs4_proc_getattr,
6816 .setattr = nfs4_proc_setattr,
6817 .lookup = nfs4_proc_lookup,
6818 .access = nfs4_proc_access,
6819 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6820 .create = nfs4_proc_create,
6821 .remove = nfs4_proc_remove,
6822 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6823 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6824 .unlink_done = nfs4_proc_unlink_done,
6825 .rename = nfs4_proc_rename,
d3d4152a 6826 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6827 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6828 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6829 .link = nfs4_proc_link,
6830 .symlink = nfs4_proc_symlink,
6831 .mkdir = nfs4_proc_mkdir,
6832 .rmdir = nfs4_proc_remove,
6833 .readdir = nfs4_proc_readdir,
6834 .mknod = nfs4_proc_mknod,
6835 .statfs = nfs4_proc_statfs,
6836 .fsinfo = nfs4_proc_fsinfo,
6837 .pathconf = nfs4_proc_pathconf,
e9326dca 6838 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6839 .decode_dirent = nfs4_decode_dirent,
6840 .read_setup = nfs4_proc_read_setup,
1abb5088 6841 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6842 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6843 .read_done = nfs4_read_done,
1da177e4 6844 .write_setup = nfs4_proc_write_setup,
57208fa7 6845 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6846 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6847 .write_done = nfs4_write_done,
1da177e4 6848 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6849 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6850 .commit_done = nfs4_commit_done,
1da177e4 6851 .lock = nfs4_proc_lock,
e50a1c2e 6852 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6853 .close_context = nfs4_close_context,
2b484297 6854 .open_context = nfs4_atomic_open,
011e2a7f 6855 .have_delegation = nfs4_have_delegation,
57ec14c5 6856 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6857 .alloc_client = nfs4_alloc_client,
45a52a02 6858 .init_client = nfs4_init_client,
cdb7eced 6859 .free_client = nfs4_free_client,
1179acc6
BS		 6860 .create_server = nfs4_create_server,
6861 .clone_server = nfs_clone_server,
1da177e4
LT		 6862};
6863
64c2ce8b
AK		 6864static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6865 .prefix = XATTR_NAME_NFSV4_ACL,
6866 .list = nfs4_xattr_list_nfs4_acl,
6867 .get = nfs4_xattr_get_nfs4_acl,
6868 .set = nfs4_xattr_set_nfs4_acl,
6869};
6870
6871const struct xattr_handler *nfs4_xattr_handlers[] = {
6872 &nfs4_xattr_nfs4_acl_handler,
6873 NULL
6874};
6875
1da177e4
LT		 6876/*
6877 * Local variables:
6878 * c-basic-offset: 8
6879 * End:
6880 */
Linux 6.x block layer and io_uring tree(s)