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NFSv4: Resend the READ/WRITE RPC call if a stateid change causes an error
[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
5521abfd 3457int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3458 const struct nfs_open_context *ctx,
3459 const struct nfs_lock_context *l_ctx,
3460 fmode_t fmode)
3461{
3462 const struct nfs_lockowner *lockowner = NULL;
3463
3464 if (l_ctx != NULL)
3465 lockowner = &l_ctx->lockowner;
5521abfd 3466 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3467}
3468EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3469
5521abfd
TM		 3470static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3471 const struct nfs_open_context *ctx,
3472 const struct nfs_lock_context *l_ctx,
3473 fmode_t fmode)
3474{
3475 nfs4_stateid current_stateid;
3476
3477 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3478 return false;
3479 return nfs4_stateid_match(stateid, &current_stateid);
3480}
3481
3482static bool nfs4_error_stateid_expired(int err)
3483{
3484 switch (err) {
3485 case -NFS4ERR_DELEG_REVOKED:
3486 case -NFS4ERR_ADMIN_REVOKED:
3487 case -NFS4ERR_BAD_STATEID:
3488 case -NFS4ERR_STALE_STATEID:
3489 case -NFS4ERR_OLD_STATEID:
3490 case -NFS4ERR_OPENMODE:
3491 case -NFS4ERR_EXPIRED:
3492 return true;
3493 }
3494 return false;
3495}
3496
d20581aa
BH		 3497void __nfs4_read_done_cb(struct nfs_read_data *data)
3498{
cd841605 3499 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3500}
3501
cbdabc7f 3502static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3503{
cd841605 3504 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3505
9e33bed5 3506 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3507 rpc_restart_call_prepare(task);
ec06c096 3508 return -EAGAIN;
1da177e4 3509 }
8850df99 3510
d20581aa 3511 __nfs4_read_done_cb(data);
1da177e4 3512 if (task->tk_status > 0)
ec06c096
TM		 3513 renew_lease(server, data->timestamp);
3514 return 0;
1da177e4
LT		 3515}
3516
5521abfd
TM		 3517static bool nfs4_read_stateid_changed(struct rpc_task *task,
3518 struct nfs_readargs *args)
3519{
3520
3521 if (!nfs4_error_stateid_expired(task->tk_status) ||
3522 nfs4_stateid_is_current(&args->stateid,
3523 args->context,
3524 args->lock_context,
3525 FMODE_READ))
3526 return false;
3527 rpc_restart_call_prepare(task);
3528 return true;
3529}
3530
cbdabc7f
AA		 3531static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3532{
3533
3534 dprintk("--> %s\n", __func__);
3535
3536 if (!nfs4_sequence_done(task, &data->res.seq_res))
3537 return -EAGAIN;
5521abfd
TM		 3538 if (nfs4_read_stateid_changed(task, &data->args))
3539 return -EAGAIN;
d20581aa
BH		 3540 return data->read_done_cb ? data->read_done_cb(task, data) :
3541 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3542}
3543
bdc7f021 3544static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3545{
1da177e4 3546 data->timestamp = jiffies;
cbdabc7f 3547 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3548 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3549 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3550}
3551
ea7c3303
BS		 3552static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3553{
9b206149 3554 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3555 &data->args.seq_args,
3556 &data->res.seq_res,
9b206149
TM		 3557 task))
3558 return;
3559 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3560 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3561}
3562
b029bc9b 3563static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3564{
cd841605 3565 struct inode *inode = data->header->inode;
1da177e4 3566
9e33bed5 3567 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3568 rpc_restart_call_prepare(task);
788e7a89 3569 return -EAGAIN;
1da177e4 3570 }
4f9838c7 3571 if (task->tk_status >= 0) {
1da177e4 3572 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3573 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3574 }
788e7a89 3575 return 0;
1da177e4
LT		 3576}
3577
5521abfd
TM		 3578static bool nfs4_write_stateid_changed(struct rpc_task *task,
3579 struct nfs_writeargs *args)
3580{
3581
3582 if (!nfs4_error_stateid_expired(task->tk_status) ||
3583 nfs4_stateid_is_current(&args->stateid,
3584 args->context,
3585 args->lock_context,
3586 FMODE_WRITE))
3587 return false;
3588 rpc_restart_call_prepare(task);
3589 return true;
3590}
3591
b029bc9b
FI		 3592static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3593{
3594 if (!nfs4_sequence_done(task, &data->res.seq_res))
3595 return -EAGAIN;
5521abfd
TM		 3596 if (nfs4_write_stateid_changed(task, &data->args))
3597 return -EAGAIN;
d20581aa
BH		 3598 return data->write_done_cb ? data->write_done_cb(task, data) :
3599 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3600}
3601
5a37f851
TM		 3602static
3603bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3604{
5a37f851
TM		 3605 const struct nfs_pgio_header *hdr = data->header;
3606
3607 /* Don't request attributes for pNFS or O_DIRECT writes */
3608 if (data->ds_clp != NULL || hdr->dreq != NULL)
3609 return false;
3610 /* Otherwise, request attributes if and only if we don't hold
3611 * a delegation
3612 */
011e2a7f 3613 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3614}
a69aef14 3615
bdc7f021 3616static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3617{
cd841605 3618 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3619
5a37f851 3620 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3621 data->args.bitmask = NULL;
3622 data->res.fattr = NULL;
3623 } else
3624 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3625
b029bc9b
FI		 3626 if (!data->write_done_cb)
3627 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3628 data->res.server = server;
1da177e4
LT		 3629 data->timestamp = jiffies;
3630
bdc7f021 3631 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3632 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3633}
3634
c6cb80d0
BS		 3635static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3636{
9b206149 3637 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3638 &data->args.seq_args,
3639 &data->res.seq_res,
9b206149
TM		 3640 task))
3641 return;
3642 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3643 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3644}
3645
0b7c0153 3646static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3647{
d9afbd1b
TM		 3648 nfs4_setup_sequence(NFS_SERVER(data->inode),
3649 &data->args.seq_args,
3650 &data->res.seq_res,
3651 task);
1da177e4
LT		 3652}
3653
0b7c0153 3654static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3655{
1da177e4 3656 struct inode *inode = data->inode;
14516c3a 3657
9e33bed5 3658 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3659 rpc_restart_call_prepare(task);
788e7a89 3660 return -EAGAIN;
1da177e4 3661 }
788e7a89 3662 return 0;
1da177e4
LT		 3663}
3664
0b7c0153 3665static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3666{
3667 if (!nfs4_sequence_done(task, &data->res.seq_res))
3668 return -EAGAIN;
0b7c0153 3669 return data->commit_done_cb(task, data);
5f452431
FI		 3670}
3671
0b7c0153 3672static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3673{
788e7a89 3674 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3675
0b7c0153
FI		 3676 if (data->commit_done_cb == NULL)
3677 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3678 data->res.server = server;
bdc7f021 3679 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3680 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3681}
3682
9bc4e3ca
CL		 3683struct nfs4_renewdata {
3684 struct nfs_client *client;
3685 unsigned long timestamp;
3686};
3687
1da177e4
LT		 3688/*
3689 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3690 * standalone procedure for queueing an asynchronous RENEW.
3691 */
9bc4e3ca 3692static void nfs4_renew_release(void *calldata)
dc96aef9 3693{
9bc4e3ca
CL		 3694 struct nfs4_renewdata *data = calldata;
3695 struct nfs_client *clp = data->client;
dc96aef9 3696
0851de06
AB		 3697 if (atomic_read(&clp->cl_count) > 1)
3698 nfs4_schedule_state_renewal(clp);
3699 nfs_put_client(clp);
9bc4e3ca 3700 kfree(data);
dc96aef9
AB		 3701}
3702
9bc4e3ca 3703static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3704{
9bc4e3ca
CL		 3705 struct nfs4_renewdata *data = calldata;
3706 struct nfs_client *clp = data->client;
3707 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3708
3709 if (task->tk_status < 0) {
95baa25c 3710 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3711 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3712 return;
3713 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3714 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3715 return;
3716 }
3717 nfs4_schedule_path_down_recovery(clp);
1da177e4 3718 }
452e9352 3719 do_renew_lease(clp, timestamp);
1da177e4
LT		 3720}
3721
963d8fe5
TM		 3722static const struct rpc_call_ops nfs4_renew_ops = {
3723 .rpc_call_done = nfs4_renew_done,
dc96aef9 3724 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3725};
3726
2f60ea6b 3727static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3728{
3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3731 .rpc_argp = clp,
b4454fe1 3732 .rpc_cred = cred,
1da177e4 3733 };
9bc4e3ca 3734 struct nfs4_renewdata *data;
1da177e4 3735
2f60ea6b
TM		 3736 if (renew_flags == 0)
3737 return 0;
0851de06
AB		 3738 if (!atomic_inc_not_zero(&clp->cl_count))
3739 return -EIO;
b569ad34 3740 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3741 if (data == NULL)
3742 return -ENOMEM;
3743 data->client = clp;
3744 data->timestamp = jiffies;
1da177e4 3745 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3746 &nfs4_renew_ops, data);
1da177e4
LT		 3747}
3748
8534d4ec 3749static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3750{
3751 struct rpc_message msg = {
3752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3753 .rpc_argp = clp,
b4454fe1 3754 .rpc_cred = cred,
1da177e4
LT		 3755 };
3756 unsigned long now = jiffies;
3757 int status;
3758
3759 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3760 if (status < 0)
3761 return status;
452e9352 3762 do_renew_lease(clp, now);
1da177e4
LT		 3763 return 0;
3764}
3765
aa1870af
BF		 3766static inline int nfs4_server_supports_acls(struct nfs_server *server)
3767{
3768 return (server->caps & NFS_CAP_ACLS)
3769 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3770 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3771}
3772
21f498c2
TM		 3773/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3774 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3775 * the stack.
3776 */
21f498c2 3777#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3778
e9e3d724
NH		 3779static int buf_to_pages_noslab(const void *buf, size_t buflen,
3780 struct page **pages, unsigned int *pgbase)
3781{
3782 struct page *newpage, **spages;
3783 int rc = 0;
3784 size_t len;
3785 spages = pages;
3786
3787 do {
21f498c2 3788 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3789 newpage = alloc_page(GFP_KERNEL);
3790
3791 if (newpage == NULL)
3792 goto unwind;
3793 memcpy(page_address(newpage), buf, len);
3794 buf += len;
3795 buflen -= len;
3796 *pages++ = newpage;
3797 rc++;
3798 } while (buflen != 0);
3799
3800 return rc;
3801
3802unwind:
3803 for(; rc > 0; rc--)
3804 __free_page(spages[rc-1]);
3805 return -ENOMEM;
3806}
3807
e50a1c2e
BF		 3808struct nfs4_cached_acl {
3809 int cached;
3810 size_t len;
3e9d4154 3811 char data[0];
e50a1c2e
BF		 3812};
3813
3814static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3815{
3816 struct nfs_inode *nfsi = NFS_I(inode);
3817
3818 spin_lock(&inode->i_lock);
3819 kfree(nfsi->nfs4_acl);
3820 nfsi->nfs4_acl = acl;
3821 spin_unlock(&inode->i_lock);
3822}
3823
3824static void nfs4_zap_acl_attr(struct inode *inode)
3825{
3826 nfs4_set_cached_acl(inode, NULL);
3827}
3828
3829static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3830{
3831 struct nfs_inode *nfsi = NFS_I(inode);
3832 struct nfs4_cached_acl *acl;
3833 int ret = -ENOENT;
3834
3835 spin_lock(&inode->i_lock);
3836 acl = nfsi->nfs4_acl;
3837 if (acl == NULL)
3838 goto out;
3839 if (buf == NULL) /* user is just asking for length */
3840 goto out_len;
3841 if (acl->cached == 0)
3842 goto out;
3843 ret = -ERANGE; /* see getxattr(2) man page */
3844 if (acl->len > buflen)
3845 goto out;
3846 memcpy(buf, acl->data, acl->len);
3847out_len:
3848 ret = acl->len;
3849out:
3850 spin_unlock(&inode->i_lock);
3851 return ret;
3852}
3853
5794d21e 3854static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3855{
3856 struct nfs4_cached_acl *acl;
b291f1b1 3857 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3858
1f1ea6c2 3859 if (buflen <= PAGE_SIZE) {
b291f1b1 3860 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3861 if (acl == NULL)
3862 goto out;
3863 acl->cached = 1;
5794d21e 3864 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3865 } else {
3866 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3867 if (acl == NULL)
3868 goto out;
3869 acl->cached = 0;
3870 }
3871 acl->len = acl_len;
3872out:
3873 nfs4_set_cached_acl(inode, acl);
3874}
3875
bf118a34
AA		 3876/*
3877 * The getxattr API returns the required buffer length when called with a
3878 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3879 * the required buf. On a NULL buf, we send a page of data to the server
3880 * guessing that the ACL request can be serviced by a page. If so, we cache
3881 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3882 * the cache. If not so, we throw away the page, and cache the required
3883 * length. The next getxattr call will then produce another round trip to
3884 * the server, this time with the input buf of the required size.
3885 */
16b4289c 3886static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3887{
bf118a34 3888 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3889 struct nfs_getaclargs args = {
3890 .fh = NFS_FH(inode),
3891 .acl_pages = pages,
3892 .acl_len = buflen,
3893 };
663c79b3
BH		 3894 struct nfs_getaclres res = {
3895 .acl_len = buflen,
3896 };
aa1870af
BF		 3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3899 .rpc_argp = &args,
663c79b3 3900 .rpc_resp = &res,
aa1870af 3901 };
21f498c2
TM		 3902 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3903 int ret = -ENOMEM, i;
aa1870af 3904
bf118a34
AA		 3905 /* As long as we're doing a round trip to the server anyway,
3906 * let's be prepared for a page of acl data. */
3907 if (npages == 0)
3908 npages = 1;
21f498c2
TM		 3909 if (npages > ARRAY_SIZE(pages))
3910 return -ERANGE;
5a006899 3911
bf118a34
AA		 3912 for (i = 0; i < npages; i++) {
3913 pages[i] = alloc_page(GFP_KERNEL);
3914 if (!pages[i])
3915 goto out_free;
e50a1c2e 3916 }
5a006899
SP		 3917
3918 /* for decoding across pages */
3919 res.acl_scratch = alloc_page(GFP_KERNEL);
3920 if (!res.acl_scratch)
3921 goto out_free;
3922
bf118a34
AA		 3923 args.acl_len = npages * PAGE_SIZE;
3924 args.acl_pgbase = 0;
5a006899 3925
de040bec 3926 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3927 __func__, buf, buflen, npages, args.acl_len);
3928 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3929 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3930 if (ret)
3931 goto out_free;
bf118a34 3932
1f1ea6c2
TM		 3933 /* Handle the case where the passed-in buffer is too short */
3934 if (res.acl_flags & NFS4_ACL_TRUNC) {
3935 /* Did the user only issue a request for the acl length? */
3936 if (buf == NULL)
3937 goto out_ok;
e50a1c2e 3938 ret = -ERANGE;
1f1ea6c2 3939 goto out_free;
e50a1c2e 3940 }
1f1ea6c2 3941 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3942 if (buf) {
3943 if (res.acl_len > buflen) {
3944 ret = -ERANGE;
3945 goto out_free;
3946 }
1f1ea6c2 3947 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3948 }
1f1ea6c2
TM		 3949out_ok:
3950 ret = res.acl_len;
e50a1c2e 3951out_free:
bf118a34
AA		 3952 for (i = 0; i < npages; i++)
3953 if (pages[i])
3954 __free_page(pages[i]);
331818f1
TM		 3955 if (res.acl_scratch)
3956 __free_page(res.acl_scratch);
aa1870af
BF		 3957 return ret;
3958}
3959
16b4289c
TM		 3960static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3961{
3962 struct nfs4_exception exception = { };
3963 ssize_t ret;
3964 do {
3965 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3966 if (ret >= 0)
3967 break;
3968 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3969 } while (exception.retry);
3970 return ret;
3971}
3972
e50a1c2e
BF		 3973static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3974{
3975 struct nfs_server *server = NFS_SERVER(inode);
3976 int ret;
3977
3978 if (!nfs4_server_supports_acls(server))
3979 return -EOPNOTSUPP;
3980 ret = nfs_revalidate_inode(server, inode);
3981 if (ret < 0)
3982 return ret;
08a22b39
AK		 3983 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3984 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3985 ret = nfs4_read_cached_acl(inode, buf, buflen);
3986 if (ret != -ENOENT)
bf118a34
AA		 3987 /* -ENOENT is returned if there is no ACL or if there is an ACL
3988 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3989 return ret;
3990 return nfs4_get_acl_uncached(inode, buf, buflen);
3991}
3992
16b4289c 3993static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3994{
3995 struct nfs_server *server = NFS_SERVER(inode);
3996 struct page *pages[NFS4ACL_MAXPAGES];
3997 struct nfs_setaclargs arg = {
3998 .fh = NFS_FH(inode),
3999 .acl_pages = pages,
4000 .acl_len = buflen,
4001 };
73c403a9 4002 struct nfs_setaclres res;
4b580ee3
BF		 4003 struct rpc_message msg = {
4004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4005 .rpc_argp = &arg,
73c403a9 4006 .rpc_resp = &res,
4b580ee3 4007 };
21f498c2 4008 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4009 int ret, i;
4b580ee3
BF		 4010
4011 if (!nfs4_server_supports_acls(server))
4012 return -EOPNOTSUPP;
21f498c2
TM		 4013 if (npages > ARRAY_SIZE(pages))
4014 return -ERANGE;
e9e3d724
NH		 4015 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4016 if (i < 0)
4017 return i;
57ec14c5 4018 nfs4_inode_return_delegation(inode);
7c513058 4019 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4020
4021 /*
4022 * Free each page after tx, so the only ref left is
4023 * held by the network stack
4024 */
4025 for (; i > 0; i--)
4026 put_page(pages[i-1]);
4027
08a22b39
AK		 4028 /*
4029 * Acl update can result in inode attribute update.
4030 * so mark the attribute cache invalid.
4031 */
4032 spin_lock(&inode->i_lock);
4033 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4034 spin_unlock(&inode->i_lock);
f41f7418
TM		 4035 nfs_access_zap_cache(inode);
4036 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4037 return ret;
4038}
4039
16b4289c
TM		 4040static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4041{
4042 struct nfs4_exception exception = { };
4043 int err;
4044 do {
4045 err = nfs4_handle_exception(NFS_SERVER(inode),
4046 __nfs4_proc_set_acl(inode, buf, buflen),
4047 &exception);
4048 } while (exception.retry);
4049 return err;
4050}
4051
1da177e4 4052static int
aa5190d0 4053nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4054{
aa5190d0
TM		 4055 struct nfs_client *clp = server->nfs_client;
4056
4057 if (task->tk_status >= 0)
1da177e4
LT		 4058 return 0;
4059 switch(task->tk_status) {
a1d0b5ee 4060 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4061 case -NFS4ERR_ADMIN_REVOKED:
4062 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4063 if (state == NULL)
4064 break;
4065 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4066 case -NFS4ERR_OPENMODE:
4067 if (state == NULL)
4068 break;
5d422301
TM		 4069 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4070 goto stateid_invalid;
0400a6b0 4071 goto wait_on_recovery;
0ced63d1 4072 case -NFS4ERR_EXPIRED:
5d422301
TM		 4073 if (state != NULL) {
4074 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4075 goto stateid_invalid;
4076 }
1da177e4 4077 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4078 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4079 nfs4_schedule_lease_recovery(clp);
4080 goto wait_on_recovery;
4745e315
AA		 4081#if defined(CONFIG_NFS_V4_1)
4082 case -NFS4ERR_BADSESSION:
4083 case -NFS4ERR_BADSLOT:
4084 case -NFS4ERR_BAD_HIGH_SLOT:
4085 case -NFS4ERR_DEADSESSION:
4086 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4087 case -NFS4ERR_SEQ_FALSE_RETRY:
4088 case -NFS4ERR_SEQ_MISORDERED:
4089 dprintk("%s ERROR %d, Reset session\n", __func__,
4090 task->tk_status);
9f594791 4091 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4092 task->tk_status = 0;
4093 return -EAGAIN;
4094#endif /* CONFIG_NFS_V4_1 */
1da177e4 4095 case -NFS4ERR_DELAY:
aa5190d0 4096 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4097 case -NFS4ERR_GRACE:
1da177e4
LT		 4098 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4099 task->tk_status = 0;
4100 return -EAGAIN;
a8a4ae3a 4101 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4102 case -NFS4ERR_OLD_STATEID:
4103 task->tk_status = 0;
4104 return -EAGAIN;
4105 }
4106 task->tk_status = nfs4_map_errors(task->tk_status);
4107 return 0;
5d422301
TM		 4108stateid_invalid:
4109 task->tk_status = -EIO;
4110 return 0;
0400a6b0 4111wait_on_recovery:
a2c0b9e2 4112 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4113 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4114 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4115 task->tk_status = 0;
4116 return -EAGAIN;
1da177e4
LT		 4117}
4118
f092075d
CL		 4119static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4120 nfs4_verifier *bootverf)
cd93710e
CL		 4121{
4122 __be32 verf[2];
4123
2c820d9a
CL		 4124 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4125 /* An impossible timestamp guarantees this value
4126 * will never match a generated boot time. */
4127 verf[0] = 0;
4128 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4129 } else {
f092075d
CL		 4130 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4131 verf[0] = (__be32)nn->boot_time.tv_sec;
4132 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4133 }
cd93710e
CL		 4134 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4135}
4136
e984a55a
CL		 4137static unsigned int
4138nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4139 char *buf, size_t len)
4140{
4141 unsigned int result;
4142
4143 rcu_read_lock();
4144 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4145 clp->cl_ipaddr,
4146 rpc_peeraddr2str(clp->cl_rpcclient,
4147 RPC_DISPLAY_ADDR),
4148 rpc_peeraddr2str(clp->cl_rpcclient,
4149 RPC_DISPLAY_PROTO));
4150 rcu_read_unlock();
4151 return result;
4152}
4153
4154static unsigned int
4155nfs4_init_uniform_client_string(const struct nfs_client *clp,
4156 char *buf, size_t len)
4157{
6f2ea7f2
CL		 4158 char *nodename = clp->cl_rpcclient->cl_nodename;
4159
4160 if (nfs4_client_id_uniquifier[0] != '\0')
4161 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4162 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4163 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4164 nodename);
e984a55a
CL		 4165}
4166
6bbb4ae8
CL		 4167/**
4168 * nfs4_proc_setclientid - Negotiate client ID
4169 * @clp: state data structure
4170 * @program: RPC program for NFSv4 callback service
4171 * @port: IP port number for NFS4 callback service
4172 * @cred: RPC credential to use for this call
4173 * @res: where to place the result
4174 *
4175 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4176 */
bb8b27e5
TM		 4177int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4178 unsigned short port, struct rpc_cred *cred,
4179 struct nfs4_setclientid_res *res)
1da177e4
LT		 4180{
4181 nfs4_verifier sc_verifier;
4182 struct nfs4_setclientid setclientid = {
4183 .sc_verifier = &sc_verifier,
4184 .sc_prog = program,
f4eecd5d 4185 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4186 };
4187 struct rpc_message msg = {
4188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4189 .rpc_argp = &setclientid,
bb8b27e5 4190 .rpc_resp = res,
286d7d6a 4191 .rpc_cred = cred,
1da177e4 4192 };
6bbb4ae8 4193 int status;
1da177e4 4194
de734831 4195 /* nfs_client_id4 */
f092075d 4196 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4197 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4198 setclientid.sc_name_len =
4199 nfs4_init_uniform_client_string(clp,
4200 setclientid.sc_name,
4201 sizeof(setclientid.sc_name));
4202 else
4203 setclientid.sc_name_len =
4204 nfs4_init_nonuniform_client_string(clp,
4205 setclientid.sc_name,
4206 sizeof(setclientid.sc_name));
de734831 4207 /* cb_client4 */
e984a55a 4208 rcu_read_lock();
de734831 4209 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4210 sizeof(setclientid.sc_netid),
4211 rpc_peeraddr2str(clp->cl_rpcclient,
4212 RPC_DISPLAY_NETID));
de734831
CL		 4213 rcu_read_unlock();
4214 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4215 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4216 clp->cl_ipaddr, port >> 8, port & 255);
4217
6bbb4ae8
CL		 4218 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4219 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4220 setclientid.sc_name_len, setclientid.sc_name);
4221 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4222 dprintk("NFS reply setclientid: %d\n", status);
4223 return status;
1da177e4
LT		 4224}
4225
6bbb4ae8
CL		 4226/**
4227 * nfs4_proc_setclientid_confirm - Confirm client ID
4228 * @clp: state data structure
4229 * @res: result of a previous SETCLIENTID
4230 * @cred: RPC credential to use for this call
4231 *
4232 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4233 */
fd954ae1 4234int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4235 struct nfs4_setclientid_res *arg,
4236 struct rpc_cred *cred)
1da177e4
LT		 4237{
4238 struct nfs_fsinfo fsinfo;
4239 struct rpc_message msg = {
4240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4241 .rpc_argp = arg,
1da177e4 4242 .rpc_resp = &fsinfo,
286d7d6a 4243 .rpc_cred = cred,
1da177e4
LT		 4244 };
4245 unsigned long now;
4246 int status;
4247
6bbb4ae8
CL		 4248 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4249 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4250 clp->cl_clientid);
1da177e4 4251 now = jiffies;
1bd714f2 4252 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4253 if (status == 0) {
4254 spin_lock(&clp->cl_lock);
4255 clp->cl_lease_time = fsinfo.lease_time * HZ;
4256 clp->cl_last_renewal = now;
4257 spin_unlock(&clp->cl_lock);
4258 }
6bbb4ae8 4259 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4260 return status;
4261}
4262
fe650407
TM		 4263struct nfs4_delegreturndata {
4264 struct nfs4_delegreturnargs args;
fa178f29 4265 struct nfs4_delegreturnres res;
fe650407
TM		 4266 struct nfs_fh fh;
4267 nfs4_stateid stateid;
26e976a8 4268 unsigned long timestamp;
fa178f29 4269 struct nfs_fattr fattr;
fe650407
TM		 4270 int rpc_status;
4271};
4272
fe650407
TM		 4273static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4274{
4275 struct nfs4_delegreturndata *data = calldata;
938e1010 4276
14516c3a
TM		 4277 if (!nfs4_sequence_done(task, &data->res.seq_res))
4278 return;
938e1010 4279
79708861
RL		 4280 switch (task->tk_status) {
4281 case -NFS4ERR_STALE_STATEID:
4282 case -NFS4ERR_EXPIRED:
4283 case 0:
fa178f29 4284 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4285 break;
4286 default:
4287 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4288 -EAGAIN) {
d00c5d43 4289 rpc_restart_call_prepare(task);
79708861
RL		 4290 return;
4291 }
4292 }
4293 data->rpc_status = task->tk_status;
fe650407
TM		 4294}
4295
4296static void nfs4_delegreturn_release(void *calldata)
4297{
fe650407
TM		 4298 kfree(calldata);
4299}
4300
938e1010
AA		 4301#if defined(CONFIG_NFS_V4_1)
4302static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4303{
4304 struct nfs4_delegreturndata *d_data;
4305
4306 d_data = (struct nfs4_delegreturndata *)data;
4307
d9afbd1b
TM		 4308 nfs4_setup_sequence(d_data->res.server,
4309 &d_data->args.seq_args,
4310 &d_data->res.seq_res,
4311 task);
938e1010
AA		 4312}
4313#endif /* CONFIG_NFS_V4_1 */
4314
c8d149f3 4315static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4316#if defined(CONFIG_NFS_V4_1)
4317 .rpc_call_prepare = nfs4_delegreturn_prepare,
4318#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4319 .rpc_call_done = nfs4_delegreturn_done,
4320 .rpc_release = nfs4_delegreturn_release,
4321};
4322
e6f81075 4323static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4324{
4325 struct nfs4_delegreturndata *data;
fa178f29 4326 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4327 struct rpc_task *task;
5138fde0
TM		 4328 struct rpc_message msg = {
4329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4330 .rpc_cred = cred,
4331 };
c970aa85
TM		 4332 struct rpc_task_setup task_setup_data = {
4333 .rpc_client = server->client,
5138fde0 4334 .rpc_message = &msg,
c970aa85
TM		 4335 .callback_ops = &nfs4_delegreturn_ops,
4336 .flags = RPC_TASK_ASYNC,
4337 };
e6f81075 4338 int status = 0;
fe650407 4339
8535b2be 4340 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4341 if (data == NULL)
4342 return -ENOMEM;
9d12b216 4343 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4344 data->args.fhandle = &data->fh;
4345 data->args.stateid = &data->stateid;
9e907fec 4346 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4347 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4348 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4349 data->res.fattr = &data->fattr;
4350 data->res.server = server;
5138fde0 4351 nfs_fattr_init(data->res.fattr);
26e976a8 4352 data->timestamp = jiffies;
fe650407
TM		 4353 data->rpc_status = 0;
4354
c970aa85 4355 task_setup_data.callback_data = data;
1174dd1f
TM		 4356 msg.rpc_argp = &data->args;
4357 msg.rpc_resp = &data->res;
c970aa85 4358 task = rpc_run_task(&task_setup_data);
7a1218a2 4359 if (IS_ERR(task))
fe650407 4360 return PTR_ERR(task);
e6f81075
TM		 4361 if (!issync)
4362 goto out;
fe650407 4363 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4364 if (status != 0)
4365 goto out;
4366 status = data->rpc_status;
e144cbcc
TM		 4367 if (status == 0)
4368 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4369 else
4370 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4371out:
e6b3c4db 4372 rpc_put_task(task);
fe650407 4373 return status;
1da177e4
LT		 4374}
4375
e6f81075 4376int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4377{
4378 struct nfs_server *server = NFS_SERVER(inode);
4379 struct nfs4_exception exception = { };
4380 int err;
4381 do {
e6f81075 4382 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4383 switch (err) {
4384 case -NFS4ERR_STALE_STATEID:
4385 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4386 case 0:
4387 return 0;
4388 }
4389 err = nfs4_handle_exception(server, err, &exception);
4390 } while (exception.retry);
4391 return err;
4392}
4393
4394#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4395#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4396
4397/*
4398 * sleep, with exponential backoff, and retry the LOCK operation.
4399 */
4400static unsigned long
4401nfs4_set_lock_task_retry(unsigned long timeout)
4402{
d310310c 4403 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4404 timeout <<= 1;
4405 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4406 return NFS4_LOCK_MAXTIMEOUT;
4407 return timeout;
4408}
4409
1da177e4
LT		 4410static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4411{
4412 struct inode *inode = state->inode;
4413 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4414 struct nfs_client *clp = server->nfs_client;
911d1aaf 4415 struct nfs_lockt_args arg = {
1da177e4 4416 .fh = NFS_FH(inode),
911d1aaf 4417 .fl = request,
1da177e4 4418 };
911d1aaf
TM		 4419 struct nfs_lockt_res res = {
4420 .denied = request,
1da177e4
LT		 4421 };
4422 struct rpc_message msg = {
4423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4424 .rpc_argp = &arg,
4425 .rpc_resp = &res,
4426 .rpc_cred = state->owner->so_cred,
4427 };
1da177e4
LT		 4428 struct nfs4_lock_state *lsp;
4429 int status;
4430
911d1aaf 4431 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4432 status = nfs4_set_lock_state(state, request);
4433 if (status != 0)
4434 goto out;
4435 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4436 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4437 arg.lock_owner.s_dev = server->s_dev;
7c513058 4438 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4439 switch (status) {
4440 case 0:
4441 request->fl_type = F_UNLCK;
4442 break;
4443 case -NFS4ERR_DENIED:
4444 status = 0;
1da177e4 4445 }
70cc6487 4446 request->fl_ops->fl_release_private(request);
8d0a8a9d 4447out:
1da177e4
LT		 4448 return status;
4449}
4450
4451static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4452{
4453 struct nfs4_exception exception = { };
4454 int err;
4455
4456 do {
4457 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4458 _nfs4_proc_getlk(state, cmd, request),
4459 &exception);
4460 } while (exception.retry);
4461 return err;
4462}
4463
4464static int do_vfs_lock(struct file *file, struct file_lock *fl)
4465{
4466 int res = 0;
4467 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4468 case FL_POSIX:
4469 res = posix_lock_file_wait(file, fl);
4470 break;
4471 case FL_FLOCK:
4472 res = flock_lock_file_wait(file, fl);
4473 break;
4474 default:
4475 BUG();
4476 }
1da177e4
LT		 4477 return res;
4478}
4479
faf5f49c 4480struct nfs4_unlockdata {
911d1aaf
TM		 4481 struct nfs_locku_args arg;
4482 struct nfs_locku_res res;
faf5f49c
TM		 4483 struct nfs4_lock_state *lsp;
4484 struct nfs_open_context *ctx;
911d1aaf
TM		 4485 struct file_lock fl;
4486 const struct nfs_server *server;
26e976a8 4487 unsigned long timestamp;
faf5f49c
TM		 4488};
4489
911d1aaf
TM		 4490static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4491 struct nfs_open_context *ctx,
4492 struct nfs4_lock_state *lsp,
4493 struct nfs_seqid *seqid)
4494{
4495 struct nfs4_unlockdata *p;
4496 struct inode *inode = lsp->ls_state->inode;
4497
8535b2be 4498 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4499 if (p == NULL)
4500 return NULL;
4501 p->arg.fh = NFS_FH(inode);
4502 p->arg.fl = &p->fl;
4503 p->arg.seqid = seqid;
c1d51931 4504 p->res.seqid = seqid;
911d1aaf
TM		 4505 p->arg.stateid = &lsp->ls_stateid;
4506 p->lsp = lsp;
4507 atomic_inc(&lsp->ls_count);
4508 /* Ensure we don't close file until we're done freeing locks! */
4509 p->ctx = get_nfs_open_context(ctx);
4510 memcpy(&p->fl, fl, sizeof(p->fl));
4511 p->server = NFS_SERVER(inode);
4512 return p;
4513}
4514
06f814a3 4515static void nfs4_locku_release_calldata(void *data)
faf5f49c 4516{
963d8fe5 4517 struct nfs4_unlockdata *calldata = data;
911d1aaf 4518 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4519 nfs4_put_lock_state(calldata->lsp);
4520 put_nfs_open_context(calldata->ctx);
4521 kfree(calldata);
faf5f49c
TM		 4522}
4523
963d8fe5 4524static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4525{
963d8fe5 4526 struct nfs4_unlockdata *calldata = data;
faf5f49c 4527
14516c3a
TM		 4528 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4529 return;
faf5f49c
TM		 4530 switch (task->tk_status) {
4531 case 0:
f597c537
TM		 4532 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4533 &calldata->res.stateid);
26e976a8 4534 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4535 break;
9e33bed5
TM		 4536 case -NFS4ERR_BAD_STATEID:
4537 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4538 case -NFS4ERR_STALE_STATEID:
4539 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4540 break;
4541 default:
9e33bed5 4542 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4543 rpc_restart_call_prepare(task);
faf5f49c 4544 }
2b1bc308 4545 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4546}
4547
4ce70ada 4548static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4549{
4ce70ada 4550 struct nfs4_unlockdata *calldata = data;
faf5f49c 4551
911d1aaf 4552 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4553 goto out_wait;
795a88c9 4554 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4555 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4556 goto out_no_action;
faf5f49c 4557 }
26e976a8 4558 calldata->timestamp = jiffies;
035168ab 4559 if (nfs4_setup_sequence(calldata->server,
a893693c 4560 &calldata->arg.seq_args,
2240a9e2
TM		 4561 &calldata->res.seq_res,
4562 task) != 0)
4563 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4564 return;
4565out_no_action:
4566 task->tk_action = NULL;
4567out_wait:
4568 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4569}
4570
963d8fe5 4571static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4572 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4573 .rpc_call_done = nfs4_locku_done,
06f814a3 4574 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4575};
4576
a5d16a4d
TM		 4577static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4578 struct nfs_open_context *ctx,
4579 struct nfs4_lock_state *lsp,
4580 struct nfs_seqid *seqid)
4581{
4582 struct nfs4_unlockdata *data;
5138fde0
TM		 4583 struct rpc_message msg = {
4584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4585 .rpc_cred = ctx->cred,
4586 };
c970aa85
TM		 4587 struct rpc_task_setup task_setup_data = {
4588 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4589 .rpc_message = &msg,
c970aa85 4590 .callback_ops = &nfs4_locku_ops,
101070ca 4591 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4592 .flags = RPC_TASK_ASYNC,
4593 };
a5d16a4d 4594
137d6aca
FF		 4595 /* Ensure this is an unlock - when canceling a lock, the
4596 * canceled lock is passed in, and it won't be an unlock.
4597 */
4598 fl->fl_type = F_UNLCK;
4599
a5d16a4d
TM		 4600 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4601 if (data == NULL) {
4602 nfs_free_seqid(seqid);
4603 return ERR_PTR(-ENOMEM);
4604 }
4605
9d12b216 4606 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4607 msg.rpc_argp = &data->arg;
4608 msg.rpc_resp = &data->res;
c970aa85
TM		 4609 task_setup_data.callback_data = data;
4610 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4611}
4612
faf5f49c
TM		 4613static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4614{
65b62a29
TM		 4615 struct inode *inode = state->inode;
4616 struct nfs4_state_owner *sp = state->owner;
4617 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4618 struct nfs_seqid *seqid;
1da177e4 4619 struct nfs4_lock_state *lsp;
06f814a3
TM		 4620 struct rpc_task *task;
4621 int status = 0;
536ff0f8 4622 unsigned char fl_flags = request->fl_flags;
faf5f49c 4623
8d0a8a9d 4624 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4625 /* Unlock _before_ we do the RPC call */
4626 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4627 /* Exclude nfs_delegation_claim_locks() */
4628 mutex_lock(&sp->so_delegreturn_mutex);
4629 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4630 down_read(&nfsi->rwsem);
4631 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4632 up_read(&nfsi->rwsem);
65b62a29 4633 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4634 goto out;
19e03c57
TM		 4635 }
4636 up_read(&nfsi->rwsem);
65b62a29 4637 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4638 if (status != 0)
9b073574
TM		 4639 goto out;
4640 /* Is this a delegated lock? */
4641 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4642 goto out;
8d0a8a9d 4643 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4644 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4645 status = -ENOMEM;
911d1aaf 4646 if (seqid == NULL)
9b073574 4647 goto out;
cd3758e3 4648 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4649 status = PTR_ERR(task);
4650 if (IS_ERR(task))
9b073574 4651 goto out;
a5d16a4d 4652 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4653 rpc_put_task(task);
9b073574 4654out:
536ff0f8 4655 request->fl_flags = fl_flags;
1da177e4
LT		 4656 return status;
4657}
4658
a5d16a4d
TM		 4659struct nfs4_lockdata {
4660 struct nfs_lock_args arg;
4661 struct nfs_lock_res res;
4662 struct nfs4_lock_state *lsp;
4663 struct nfs_open_context *ctx;
4664 struct file_lock fl;
26e976a8 4665 unsigned long timestamp;
a5d16a4d
TM		 4666 int rpc_status;
4667 int cancelled;
66179efe 4668 struct nfs_server *server;
a5d16a4d
TM		 4669};
4670
4671static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4672 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4673 gfp_t gfp_mask)
1da177e4 4674{
a5d16a4d
TM		 4675 struct nfs4_lockdata *p;
4676 struct inode *inode = lsp->ls_state->inode;
1da177e4 4677 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4678
8535b2be 4679 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4680 if (p == NULL)
4681 return NULL;
4682
4683 p->arg.fh = NFS_FH(inode);
4684 p->arg.fl = &p->fl;
8535b2be 4685 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4686 if (p->arg.open_seqid == NULL)
4687 goto out_free;
8535b2be 4688 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4689 if (p->arg.lock_seqid == NULL)
2f74c0a0 4690 goto out_free_seqid;
a5d16a4d 4691 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4692 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4693 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4694 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4695 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4696 p->lsp = lsp;
66179efe 4697 p->server = server;
a5d16a4d
TM		 4698 atomic_inc(&lsp->ls_count);
4699 p->ctx = get_nfs_open_context(ctx);
4700 memcpy(&p->fl, fl, sizeof(p->fl));
4701 return p;
2f74c0a0
TM		 4702out_free_seqid:
4703 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4704out_free:
4705 kfree(p);
4706 return NULL;
4707}
4708
4709static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4710{
4711 struct nfs4_lockdata *data = calldata;
4712 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4713
3110ff80 4714 dprintk("%s: begin!\n", __func__);
2f74c0a0 4715 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4716 goto out_wait;
a5d16a4d
TM		 4717 /* Do we need to do an open_to_lock_owner? */
4718 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4719 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4720 goto out_release_lock_seqid;
8fe72bac 4721 }
a5d16a4d
TM		 4722 data->arg.open_stateid = &state->stateid;
4723 data->arg.new_lock_owner = 1;
c1d51931 4724 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4725 } else
4726 data->arg.new_lock_owner = 0;
5d422301
TM		 4727 if (!nfs4_valid_open_stateid(state)) {
4728 data->rpc_status = -EBADF;
4729 task->tk_action = NULL;
4730 goto out_release_open_seqid;
4731 }
26e976a8 4732 data->timestamp = jiffies;
035168ab
TM		 4733 if (nfs4_setup_sequence(data->server,
4734 &data->arg.seq_args,
2240a9e2 4735 &data->res.seq_res,
d9afbd1b 4736 task) == 0)
66179efe 4737 return;
5d422301 4738out_release_open_seqid:
2240a9e2
TM		 4739 nfs_release_seqid(data->arg.open_seqid);
4740out_release_lock_seqid:
4741 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4742out_wait:
4743 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4744 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4745}
4746
a5d16a4d
TM		 4747static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4748{
4749 struct nfs4_lockdata *data = calldata;
4750
3110ff80 4751 dprintk("%s: begin!\n", __func__);
a5d16a4d 4752
14516c3a
TM		 4753 if (!nfs4_sequence_done(task, &data->res.seq_res))
4754 return;
66179efe 4755
a5d16a4d 4756 data->rpc_status = task->tk_status;
a5d16a4d 4757 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4758 if (data->rpc_status == 0)
4759 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4760 else
4761 goto out;
4762 }
4763 if (data->rpc_status == 0) {
f597c537 4764 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4765 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4766 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4767 }
a5d16a4d 4768out:
3110ff80 4769 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4770}
4771
4772static void nfs4_lock_release(void *calldata)
4773{
4774 struct nfs4_lockdata *data = calldata;
4775
3110ff80 4776 dprintk("%s: begin!\n", __func__);
2f74c0a0 4777 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4778 if (data->cancelled != 0) {
4779 struct rpc_task *task;
4780 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4781 data->arg.lock_seqid);
4782 if (!IS_ERR(task))
bf294b41 4783 rpc_put_task_async(task);
3110ff80 4784 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4785 } else
4786 nfs_free_seqid(data->arg.lock_seqid);
4787 nfs4_put_lock_state(data->lsp);
4788 put_nfs_open_context(data->ctx);
4789 kfree(data);
3110ff80 4790 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4791}
4792
4793static const struct rpc_call_ops nfs4_lock_ops = {
4794 .rpc_call_prepare = nfs4_lock_prepare,
4795 .rpc_call_done = nfs4_lock_done,
4796 .rpc_release = nfs4_lock_release,
4797};
4798
2bee72a6
TM		 4799static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4800{
2bee72a6
TM		 4801 switch (error) {
4802 case -NFS4ERR_ADMIN_REVOKED:
4803 case -NFS4ERR_BAD_STATEID:
ecac799a 4804 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4805 if (new_lock_owner != 0 ||
795a88c9 4806 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4807 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4808 break;
4809 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4810 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4811 case -NFS4ERR_EXPIRED:
4812 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4813 };
4814}
4815
afe6c27c 4816static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4817{
4818 struct nfs4_lockdata *data;
4819 struct rpc_task *task;
5138fde0
TM		 4820 struct rpc_message msg = {
4821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4822 .rpc_cred = state->owner->so_cred,
4823 };
c970aa85
TM		 4824 struct rpc_task_setup task_setup_data = {
4825 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4826 .rpc_message = &msg,
c970aa85 4827 .callback_ops = &nfs4_lock_ops,
101070ca 4828 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4829 .flags = RPC_TASK_ASYNC,
4830 };
a5d16a4d
TM		 4831 int ret;
4832
3110ff80 4833 dprintk("%s: begin!\n", __func__);
cd3758e3 4834 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4835 fl->fl_u.nfs4_fl.owner,
4836 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4837 if (data == NULL)
4838 return -ENOMEM;
4839 if (IS_SETLKW(cmd))
4840 data->arg.block = 1;
9d12b216 4841 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4842 msg.rpc_argp = &data->arg;
4843 msg.rpc_resp = &data->res;
c970aa85 4844 task_setup_data.callback_data = data;
8fe72bac
TM		 4845 if (recovery_type > NFS_LOCK_NEW) {
4846 if (recovery_type == NFS_LOCK_RECLAIM)
4847 data->arg.reclaim = NFS_LOCK_RECLAIM;
4848 nfs4_set_sequence_privileged(&data->arg.seq_args);
4849 }
c970aa85 4850 task = rpc_run_task(&task_setup_data);
7a1218a2 4851 if (IS_ERR(task))
a5d16a4d 4852 return PTR_ERR(task);
a5d16a4d
TM		 4853 ret = nfs4_wait_for_completion_rpc_task(task);
4854 if (ret == 0) {
4855 ret = data->rpc_status;
2bee72a6
TM		 4856 if (ret)
4857 nfs4_handle_setlk_error(data->server, data->lsp,
4858 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4859 } else
4860 data->cancelled = 1;
e6b3c4db 4861 rpc_put_task(task);
3110ff80 4862 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4863 return ret;
1da177e4
LT		 4864}
4865
4866static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4867{
202b50dc 4868 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4869 struct nfs4_exception exception = {
4870 .inode = state->inode,
4871 };
202b50dc
TM		 4872 int err;
4873
4874 do {
42a2d13e
TM		 4875 /* Cache the lock if possible... */
4876 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4877 return 0;
afe6c27c 4878 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4879 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4880 break;
4881 nfs4_handle_exception(server, err, &exception);
4882 } while (exception.retry);
4883 return err;
1da177e4
LT		 4884}
4885
4886static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4887{
202b50dc 4888 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4889 struct nfs4_exception exception = {
4890 .inode = state->inode,
4891 };
202b50dc
TM		 4892 int err;
4893
6bfc93ef
TM		 4894 err = nfs4_set_lock_state(state, request);
4895 if (err != 0)
4896 return err;
202b50dc 4897 do {
42a2d13e
TM		 4898 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4899 return 0;
afe6c27c 4900 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4901 switch (err) {
4902 default:
4903 goto out;
4904 case -NFS4ERR_GRACE:
4905 case -NFS4ERR_DELAY:
4906 nfs4_handle_exception(server, err, &exception);
4907 err = 0;
4908 }
202b50dc 4909 } while (exception.retry);
a9ed2e25 4910out:
202b50dc 4911 return err;
1da177e4
LT		 4912}
4913
f062eb6c 4914#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4915/**
4916 * nfs41_check_expired_locks - possibly free a lock stateid
4917 *
4918 * @state: NFSv4 state for an inode
4919 *
4920 * Returns NFS_OK if recovery for this stateid is now finished.
4921 * Otherwise a negative NFS4ERR value is returned.
4922 */
b01dd1d8 4923static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4924{
eb64cf96 4925 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4926 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4927 struct nfs_server *server = NFS_SERVER(state->inode);
4928
b01dd1d8 4929 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4930 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4931 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4932 if (status != NFS_OK) {
3e60ffdd
CL		 4933 /* Free the stateid unless the server
4934 * informs us the stateid is unrecognized. */
89af2739
CL		 4935 if (status != -NFS4ERR_BAD_STATEID)
4936 nfs41_free_stateid(server,
4937 &lsp->ls_stateid);
795a88c9 4938 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4939 ret = status;
4940 }
4941 }
4942 };
4943
4944 return ret;
4945}
4946
4947static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4948{
4949 int status = NFS_OK;
4950
4951 if (test_bit(LK_STATE_IN_USE, &state->flags))
4952 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4953 if (status != NFS_OK)
4954 status = nfs4_lock_expired(state, request);
4955 return status;
f062eb6c
BS		 4956}
4957#endif
4958
1da177e4
LT		 4959static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4960{
9a99af49 4961 struct nfs4_state_owner *sp = state->owner;
19e03c57 4962 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4963 unsigned char fl_flags = request->fl_flags;
9a99af49 4964 unsigned int seq;
8e469ebd 4965 int status = -ENOLCK;
1da177e4 4966
8e469ebd
TM		 4967 if ((fl_flags & FL_POSIX) &&
4968 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4969 goto out;
6bfc93ef 4970 /* Is this a delegated open? */
6bfc93ef
TM		 4971 status = nfs4_set_lock_state(state, request);
4972 if (status != 0)
4973 goto out;
01c3b861
TM		 4974 request->fl_flags |= FL_ACCESS;
4975 status = do_vfs_lock(request->fl_file, request);
4976 if (status < 0)
4977 goto out;
19e03c57 4978 down_read(&nfsi->rwsem);
01c3b861 4979 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4980 /* Yes: cache locks! */
01c3b861 4981 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4982 request->fl_flags = fl_flags & ~FL_SLEEP;
4983 status = do_vfs_lock(request->fl_file, request);
4984 goto out_unlock;
01c3b861 4985 }
9a99af49
TM		 4986 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4987 up_read(&nfsi->rwsem);
afe6c27c 4988 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4989 if (status != 0)
9a99af49
TM		 4990 goto out;
4991 down_read(&nfsi->rwsem);
4992 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4993 status = -NFS4ERR_DELAY;
01c3b861 4994 goto out_unlock;
9a99af49 4995 }
6bfc93ef 4996 /* Note: we always want to sleep here! */
01c3b861 4997 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4998 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4999 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5000 "manager!\n", __func__);
01c3b861 5001out_unlock:
19e03c57 5002 up_read(&nfsi->rwsem);
01c3b861
TM		 5003out:
5004 request->fl_flags = fl_flags;
1da177e4
LT		 5005 return status;
5006}
5007
5008static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5009{
a1d0b5ee
TM		 5010 struct nfs4_exception exception = {
5011 .state = state,
05ffe24f 5012 .inode = state->inode,
a1d0b5ee 5013 };
1da177e4
LT		 5014 int err;
5015
5016 do {
965b5d67
TM		 5017 err = _nfs4_proc_setlk(state, cmd, request);
5018 if (err == -NFS4ERR_DENIED)
5019 err = -EAGAIN;
1da177e4 5020 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5021 err, &exception);
1da177e4
LT		 5022 } while (exception.retry);
5023 return err;
5024}
5025
5026static int
5027nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5028{
5029 struct nfs_open_context *ctx;
5030 struct nfs4_state *state;
5031 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5032 int status;
5033
5034 /* verify open state */
cd3758e3 5035 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5036 state = ctx->state;
5037
5038 if (request->fl_start < 0 || request->fl_end < 0)
5039 return -EINVAL;
5040
d953126a
TM		 5041 if (IS_GETLK(cmd)) {
5042 if (state != NULL)
5043 return nfs4_proc_getlk(state, F_GETLK, request);
5044 return 0;
5045 }
1da177e4
LT		 5046
5047 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5048 return -EINVAL;
5049
d953126a
TM		 5050 if (request->fl_type == F_UNLCK) {
5051 if (state != NULL)
5052 return nfs4_proc_unlck(state, cmd, request);
5053 return 0;
5054 }
1da177e4 5055
d953126a
TM		 5056 if (state == NULL)
5057 return -ENOLCK;
55725513
TM		 5058 /*
5059 * Don't rely on the VFS having checked the file open mode,
5060 * since it won't do this for flock() locks.
5061 */
f44106e2 5062 switch (request->fl_type) {
55725513
TM		 5063 case F_RDLCK:
5064 if (!(filp->f_mode & FMODE_READ))
5065 return -EBADF;
5066 break;
5067 case F_WRLCK:
5068 if (!(filp->f_mode & FMODE_WRITE))
5069 return -EBADF;
5070 }
5071
1da177e4
LT		 5072 do {
5073 status = nfs4_proc_setlk(state, cmd, request);
5074 if ((status != -EAGAIN) || IS_SETLK(cmd))
5075 break;
5076 timeout = nfs4_set_lock_task_retry(timeout);
5077 status = -ERESTARTSYS;
5078 if (signalled())
5079 break;
5080 } while(status < 0);
1da177e4
LT		 5081 return status;
5082}
5083
888e694c
TM		 5084int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5085{
5086 struct nfs_server *server = NFS_SERVER(state->inode);
5087 struct nfs4_exception exception = { };
5088 int err;
5089
5090 err = nfs4_set_lock_state(state, fl);
5091 if (err != 0)
5092 goto out;
5093 do {
afe6c27c 5094 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5095 switch (err) {
5096 default:
a030889a
WAA		 5097 printk(KERN_ERR "NFS: %s: unhandled error "
5098 "%d.\n", __func__, err);
d5122201 5099 case 0:
965b5d67 5100 case -ESTALE:
d5122201 5101 goto out;
d5122201 5102 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5103 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5104 set_bit(NFS_DELEGATED_STATE, &state->flags);
5105 case -NFS4ERR_EXPIRED:
0400a6b0 5106 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5107 err = -EAGAIN;
0400a6b0 5108 goto out;
74e7bb73
RL		 5109 case -NFS4ERR_BADSESSION:
5110 case -NFS4ERR_BADSLOT:
5111 case -NFS4ERR_BAD_HIGH_SLOT:
5112 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5113 case -NFS4ERR_DEADSESSION:
37380e42 5114 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5115 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5116 err = -EAGAIN;
d5122201 5117 goto out;
a1d0b5ee 5118 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5119 case -NFS4ERR_ADMIN_REVOKED:
5120 case -NFS4ERR_BAD_STATEID:
5121 case -NFS4ERR_OPENMODE:
0400a6b0 5122 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5123 err = 0;
5124 goto out;
5125 case -ENOMEM:
5126 case -NFS4ERR_DENIED:
5127 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5128 err = 0;
5129 goto out;
d5122201 5130 }
37380e42 5131 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5132 err = nfs4_handle_exception(server, err, &exception);
5133 } while (exception.retry);
5134out:
5135 return err;
5136}
6b3b5496 5137
cf470c3e
TM		 5138struct nfs_release_lockowner_data {
5139 struct nfs4_lock_state *lsp;
5ae67c4f 5140 struct nfs_server *server;
cf470c3e
TM		 5141 struct nfs_release_lockowner_args args;
5142};
5143
d3c7b7cc
TM		 5144static void nfs4_release_lockowner_release(void *calldata)
5145{
cf470c3e 5146 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5147 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5148 kfree(calldata);
5149}
5150
17280175 5151static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5152 .rpc_release = nfs4_release_lockowner_release,
5153};
5154
cf470c3e 5155int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5156{
5157 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5158 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5159 struct rpc_message msg = {
5160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5161 };
5162
5163 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5164 return -EINVAL;
5165 data = kmalloc(sizeof(*data), GFP_NOFS);
5166 if (!data)
5167 return -ENOMEM;
5168 data->lsp = lsp;
5ae67c4f 5169 data->server = server;
cf470c3e
TM		 5170 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5171 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5172 data->args.lock_owner.s_dev = server->s_dev;
5173 msg.rpc_argp = &data->args;
5174 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5175 return 0;
d3c7b7cc
TM		 5176}
5177
aa1870af
BF		 5178#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5179
64c2ce8b
AK		 5180static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5181 const void *buf, size_t buflen,
5182 int flags, int type)
6b3b5496 5183{
64c2ce8b
AK		 5184 if (strcmp(key, "") != 0)
5185 return -EINVAL;
4b580ee3 5186
64c2ce8b 5187 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5188}
5189
64c2ce8b
AK		 5190static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5191 void *buf, size_t buflen, int type)
6b3b5496 5192{
64c2ce8b
AK		 5193 if (strcmp(key, "") != 0)
5194 return -EINVAL;
aa1870af 5195
64c2ce8b 5196 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5197}
5198
64c2ce8b
AK		 5199static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5200 size_t list_len, const char *name,
5201 size_t name_len, int type)
6b3b5496 5202{
64c2ce8b 5203 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5204
096455a2
BF		 5205 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5206 return 0;
64c2ce8b
AK		 5207
5208 if (list && len <= list_len)
5209 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5210 return len;
6b3b5496
BF		 5211}
5212
533eb461
AA		 5213/*
5214 * nfs_fhget will use either the mounted_on_fileid or the fileid
5215 */
69aaaae1
TM		 5216static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5217{
533eb461
AA		 5218 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5219 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5220 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5221 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5222 return;
5223
5224 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5225 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5226 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5227 fattr->nlink = 2;
5228}
5229
f05d147f
BS		 5230static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5231 const struct qstr *name,
5232 struct nfs4_fs_locations *fs_locations,
5233 struct page *page)
683b57b4
TM		 5234{
5235 struct nfs_server *server = NFS_SERVER(dir);
5236 u32 bitmask[2] = {
361e624f 5237 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5238 };
5239 struct nfs4_fs_locations_arg args = {
5240 .dir_fh = NFS_FH(dir),
c228fd3a 5241 .name = name,
683b57b4
TM		 5242 .page = page,
5243 .bitmask = bitmask,
5244 };
22958463
BH		 5245 struct nfs4_fs_locations_res res = {
5246 .fs_locations = fs_locations,
5247 };
683b57b4
TM		 5248 struct rpc_message msg = {
5249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5250 .rpc_argp = &args,
22958463 5251 .rpc_resp = &res,
683b57b4
TM		 5252 };
5253 int status;
5254
3110ff80 5255 dprintk("%s: start\n", __func__);
533eb461
AA		 5256
5257 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5258 * is not supported */
5259 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5260 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5261 else
5262 bitmask[0] |= FATTR4_WORD0_FILEID;
5263
c228fd3a 5264 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5265 fs_locations->server = server;
830b8e33 5266 fs_locations->nlocations = 0;
f05d147f 5267 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5268 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5269 return status;
5270}
5271
f05d147f
BS		 5272int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5273 const struct qstr *name,
5274 struct nfs4_fs_locations *fs_locations,
5275 struct page *page)
db0a9593
BS		 5276{
5277 struct nfs4_exception exception = { };
5278 int err;
5279 do {
5280 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5281 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5282 &exception);
5283 } while (exception.retry);
5284 return err;
5285}
5286
5a5ea0d4
BS		 5287static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5288{
5289 int status;
5290 struct nfs4_secinfo_arg args = {
5291 .dir_fh = NFS_FH(dir),
5292 .name = name,
5293 };
5294 struct nfs4_secinfo_res res = {
5295 .flavors = flavors,
5296 };
5297 struct rpc_message msg = {
5298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5299 .rpc_argp = &args,
5300 .rpc_resp = &res,
5301 };
5302
5303 dprintk("NFS call secinfo %s\n", name->name);
5304 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5305 dprintk("NFS reply secinfo: %d\n", status);
5306 return status;
5307}
5308
72de53ec
BS		 5309int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5310 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5311{
5312 struct nfs4_exception exception = { };
5313 int err;
5314 do {
5315 err = nfs4_handle_exception(NFS_SERVER(dir),
5316 _nfs4_proc_secinfo(dir, name, flavors),
5317 &exception);
5318 } while (exception.retry);
5319 return err;
5320}
5321
557134a3 5322#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5323/*
5324 * Check the exchange flags returned by the server for invalid flags, having
5325 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5326 * DS flags set.
5327 */
5328static int nfs4_check_cl_exchange_flags(u32 flags)
5329{
5330 if (flags & ~EXCHGID4_FLAG_MASK_R)
5331 goto out_inval;
5332 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5333 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5334 goto out_inval;
5335 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5336 goto out_inval;
5337 return NFS_OK;
5338out_inval:
5339 return -NFS4ERR_INVAL;
5340}
5341
78fe0f41 5342static bool
79d4e1f0
CL		 5343nfs41_same_server_scope(struct nfs41_server_scope *a,
5344 struct nfs41_server_scope *b)
78fe0f41
WAA		 5345{
5346 if (a->server_scope_sz == b->server_scope_sz &&
5347 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5348 return true;
5349
5350 return false;
5351}
5352
7c44f1ae
WAA		 5353/*
5354 * nfs4_proc_bind_conn_to_session()
5355 *
5356 * The 4.1 client currently uses the same TCP connection for the
5357 * fore and backchannel.
5358 */
2cf047c9 5359int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5360{
5361 int status;
5362 struct nfs41_bind_conn_to_session_res res;
5363 struct rpc_message msg = {
5364 .rpc_proc =
5365 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5366 .rpc_argp = clp,
5367 .rpc_resp = &res,
2cf047c9 5368 .rpc_cred = cred,
7c44f1ae
WAA		 5369 };
5370
5371 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5372
5373 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5374 if (unlikely(res.session == NULL)) {
5375 status = -ENOMEM;
5376 goto out;
5377 }
5378
5379 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5380 if (status == 0) {
5381 if (memcmp(res.session->sess_id.data,
5382 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5383 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5384 status = -EIO;
5385 goto out_session;
5386 }
5387 if (res.dir != NFS4_CDFS4_BOTH) {
5388 dprintk("NFS: %s: Unexpected direction from server\n",
5389 __func__);
5390 status = -EIO;
5391 goto out_session;
5392 }
5393 if (res.use_conn_in_rdma_mode) {
5394 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5395 __func__);
5396 status = -EIO;
5397 goto out_session;
5398 }
5399 }
5400out_session:
5401 kfree(res.session);
5402out:
5403 dprintk("<-- %s status= %d\n", __func__, status);
5404 return status;
5405}
5406
99fe60d0
BH		 5407/*
5408 * nfs4_proc_exchange_id()
5409 *
6bbb4ae8
CL		 5410 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5411 *
99fe60d0
BH		 5412 * Since the clientid has expired, all compounds using sessions
5413 * associated with the stale clientid will be returning
5414 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5415 * be in some phase of session reset.
5416 */
4d643d1d 5417int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5418{
5419 nfs4_verifier verifier;
5420 struct nfs41_exchange_id_args args = {
cd93710e 5421 .verifier = &verifier,
99fe60d0 5422 .client = clp,
357f54d6 5423 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5424 };
5425 struct nfs41_exchange_id_res res = {
32b01310 5426 0
99fe60d0
BH		 5427 };
5428 int status;
5429 struct rpc_message msg = {
5430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5431 .rpc_argp = &args,
5432 .rpc_resp = &res,
5433 .rpc_cred = cred,
5434 };
99fe60d0 5435
f092075d 5436 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5437 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5438 sizeof(args.id));
6bbb4ae8
CL		 5439 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5440 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5441 args.id_len, args.id);
99fe60d0 5442
acdeb69d 5443 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5444 GFP_NOFS);
acdeb69d 5445 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5446 status = -ENOMEM;
5447 goto out;
5448 }
78fe0f41 5449
79d4e1f0 5450 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5451 GFP_NOFS);
177313f1 5452 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5453 status = -ENOMEM;
acdeb69d 5454 goto out_server_owner;
abe9a6d5 5455 }
78fe0f41 5456
bbafffd2 5457 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5458 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5459 status = -ENOMEM;
5460 goto out_server_scope;
5461 }
5462
1bd714f2 5463 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5464 if (status == 0)
32b01310 5465 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5466
acdeb69d 5467 if (status == 0) {
32b01310
TM		 5468 clp->cl_clientid = res.clientid;
5469 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5470 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5471 clp->cl_seqid = res.seqid;
5472
acdeb69d
CL		 5473 kfree(clp->cl_serverowner);
5474 clp->cl_serverowner = res.server_owner;
5475 res.server_owner = NULL;
78fe0f41 5476
7d2ed9ac 5477 /* use the most recent implementation id */
59155546
CL		 5478 kfree(clp->cl_implid);
5479 clp->cl_implid = res.impl_id;
7d2ed9ac 5480
177313f1 5481 if (clp->cl_serverscope != NULL &&
79d4e1f0 5482 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5483 res.server_scope)) {
5484 dprintk("%s: server_scope mismatch detected\n",
5485 __func__);
5486 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5487 kfree(clp->cl_serverscope);
5488 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5489 }
5490
177313f1 5491 if (clp->cl_serverscope == NULL) {
79d4e1f0 5492 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5493 goto out;
5494 }
32b01310
TM		 5495 } else
5496 kfree(res.impl_id);
7d2ed9ac 5497
acdeb69d
CL		 5498out_server_owner:
5499 kfree(res.server_owner);
7d2ed9ac 5500out_server_scope:
abe9a6d5
WAA		 5501 kfree(res.server_scope);
5502out:
177313f1 5503 if (clp->cl_implid != NULL)
6bbb4ae8 5504 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5505 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5506 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5507 clp->cl_implid->date.seconds,
5508 clp->cl_implid->date.nseconds);
6bbb4ae8 5509 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5510 return status;
5511}
5512
66245539
TM		 5513static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5514 struct rpc_cred *cred)
5515{
5516 struct rpc_message msg = {
5517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5518 .rpc_argp = clp,
5519 .rpc_cred = cred,
5520 };
5521 int status;
5522
5523 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5524 if (status)
02c67525 5525 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5526 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5527 return status;
5528}
5529
5530static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5531 struct rpc_cred *cred)
5532{
5533 unsigned int loop;
5534 int ret;
5535
5536 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5537 ret = _nfs4_proc_destroy_clientid(clp, cred);
5538 switch (ret) {
5539 case -NFS4ERR_DELAY:
5540 case -NFS4ERR_CLIENTID_BUSY:
5541 ssleep(1);
5542 break;
5543 default:
5544 return ret;
5545 }
5546 }
5547 return 0;
5548}
5549
5550int nfs4_destroy_clientid(struct nfs_client *clp)
5551{
5552 struct rpc_cred *cred;
5553 int ret = 0;
5554
5555 if (clp->cl_mvops->minor_version < 1)
5556 goto out;
5557 if (clp->cl_exchange_flags == 0)
5558 goto out;
05f4c350
CL		 5559 if (clp->cl_preserve_clid)
5560 goto out;
66245539
TM		 5561 cred = nfs4_get_exchange_id_cred(clp);
5562 ret = nfs4_proc_destroy_clientid(clp, cred);
5563 if (cred)
5564 put_rpccred(cred);
5565 switch (ret) {
5566 case 0:
5567 case -NFS4ERR_STALE_CLIENTID:
5568 clp->cl_exchange_flags = 0;
5569 }
5570out:
5571 return ret;
5572}
5573
2050f0cc
AA		 5574struct nfs4_get_lease_time_data {
5575 struct nfs4_get_lease_time_args *args;
5576 struct nfs4_get_lease_time_res *res;
5577 struct nfs_client *clp;
5578};
5579
5580static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5581 void *calldata)
5582{
2050f0cc
AA		 5583 struct nfs4_get_lease_time_data *data =
5584 (struct nfs4_get_lease_time_data *)calldata;
5585
5586 dprintk("--> %s\n", __func__);
5587 /* just setup sequence, do not trigger session recovery
5588 since we're invoked within one */
d9afbd1b
TM		 5589 nfs41_setup_sequence(data->clp->cl_session,
5590 &data->args->la_seq_args,
5591 &data->res->lr_seq_res,
5592 task);
2050f0cc
AA		 5593 dprintk("<-- %s\n", __func__);
5594}
5595
5596/*
5597 * Called from nfs4_state_manager thread for session setup, so don't recover
5598 * from sequence operation or clientid errors.
5599 */
5600static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5601{
5602 struct nfs4_get_lease_time_data *data =
5603 (struct nfs4_get_lease_time_data *)calldata;
5604
5605 dprintk("--> %s\n", __func__);
14516c3a
TM		 5606 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5607 return;
2050f0cc
AA		 5608 switch (task->tk_status) {
5609 case -NFS4ERR_DELAY:
5610 case -NFS4ERR_GRACE:
5611 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5612 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5613 task->tk_status = 0;
a8a4ae3a
AA		 5614 /* fall through */
5615 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5616 rpc_restart_call_prepare(task);
2050f0cc
AA		 5617 return;
5618 }
2050f0cc
AA		 5619 dprintk("<-- %s\n", __func__);
5620}
5621
17280175 5622static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5623 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5624 .rpc_call_done = nfs4_get_lease_time_done,
5625};
5626
5627int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5628{
5629 struct rpc_task *task;
5630 struct nfs4_get_lease_time_args args;
5631 struct nfs4_get_lease_time_res res = {
5632 .lr_fsinfo = fsinfo,
5633 };
5634 struct nfs4_get_lease_time_data data = {
5635 .args = &args,
5636 .res = &res,
5637 .clp = clp,
5638 };
5639 struct rpc_message msg = {
5640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5641 .rpc_argp = &args,
5642 .rpc_resp = &res,
5643 };
5644 struct rpc_task_setup task_setup = {
5645 .rpc_client = clp->cl_rpcclient,
5646 .rpc_message = &msg,
5647 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5648 .callback_data = &data,
5649 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5650 };
5651 int status;
5652
9d12b216 5653 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5654 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5655 dprintk("--> %s\n", __func__);
5656 task = rpc_run_task(&task_setup);
5657
5658 if (IS_ERR(task))
5659 status = PTR_ERR(task);
5660 else {
5661 status = task->tk_status;
5662 rpc_put_task(task);
5663 }
5664 dprintk("<-- %s return %d\n", __func__, status);
5665
5666 return status;
5667}
5668
fc931582
AA		 5669/*
5670 * Initialize the values to be used by the client in CREATE_SESSION
5671 * If nfs4_init_session set the fore channel request and response sizes,
5672 * use them.
5673 *
5674 * Set the back channel max_resp_sz_cached to zero to force the client to
5675 * always set csa_cachethis to FALSE because the current implementation
5676 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5677 */
5678static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5679{
5680 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5681 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5682 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5683
5684 if (mxrqst_sz == 0)
5685 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5686 if (mxresp_sz == 0)
5687 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5688 /* Fore channel attributes */
fc931582
AA		 5689 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5690 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5691 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5692 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5693
5694 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5695 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5696 __func__,
5697 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5698 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5699
5700 /* Back channel attributes */
fc931582
AA		 5701 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5702 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5703 args->bc_attrs.max_resp_sz_cached = 0;
5704 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5705 args->bc_attrs.max_reqs = 1;
5706
5707 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5708 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5709 __func__,
5710 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5711 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5712 args->bc_attrs.max_reqs);
5713}
5714
43c2e885 5715static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5716{
43c2e885
BF		 5717 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5718 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5719
43c2e885
BF		 5720 if (rcvd->max_resp_sz > sent->max_resp_sz)
5721 return -EINVAL;
5722 /*
5723 * Our requested max_ops is the minimum we need; we're not
5724 * prepared to break up compounds into smaller pieces than that.
5725 * So, no point even trying to continue if the server won't
5726 * cooperate:
5727 */
5728 if (rcvd->max_ops < sent->max_ops)
5729 return -EINVAL;
5730 if (rcvd->max_reqs == 0)
5731 return -EINVAL;
b4b9a0c1
VG		 5732 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5733 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5734 return 0;
8d35301d
AA		 5735}
5736
43c2e885
BF		 5737static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5738{
5739 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5740 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5741
43c2e885
BF		 5742 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5743 return -EINVAL;
5744 if (rcvd->max_resp_sz < sent->max_resp_sz)
5745 return -EINVAL;
5746 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5747 return -EINVAL;
5748 /* These would render the backchannel useless: */
b4b9a0c1 5749 if (rcvd->max_ops != sent->max_ops)
43c2e885 5750 return -EINVAL;
b4b9a0c1 5751 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5752 return -EINVAL;
5753 return 0;
5754}
8d35301d 5755
8d35301d
AA		 5756static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5757 struct nfs4_session *session)
5758{
43c2e885 5759 int ret;
8d35301d 5760
43c2e885
BF		 5761 ret = nfs4_verify_fore_channel_attrs(args, session);
5762 if (ret)
5763 return ret;
5764 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5765}
5766
848f5bda
TM		 5767static int _nfs4_proc_create_session(struct nfs_client *clp,
5768 struct rpc_cred *cred)
fc931582
AA		 5769{
5770 struct nfs4_session *session = clp->cl_session;
5771 struct nfs41_create_session_args args = {
5772 .client = clp,
5773 .cb_program = NFS4_CALLBACK,
5774 };
5775 struct nfs41_create_session_res res = {
5776 .client = clp,
5777 };
5778 struct rpc_message msg = {
5779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5780 .rpc_argp = &args,
5781 .rpc_resp = &res,
848f5bda 5782 .rpc_cred = cred,
fc931582
AA		 5783 };
5784 int status;
5785
5786 nfs4_init_channel_attrs(&args);
0f91421e 5787 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5788
1bd714f2 5789 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5790
43095d39 5791 if (!status) {
8d35301d
AA		 5792 /* Verify the session's negotiated channel_attrs values */
5793 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5794 /* Increment the clientid slot sequence id */
5795 clp->cl_seqid++;
5796 }
5797
5798 return status;
5799}
5800
5801/*
5802 * Issues a CREATE_SESSION operation to the server.
5803 * It is the responsibility of the caller to verify the session is
5804 * expired before calling this routine.
5805 */
848f5bda 5806int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5807{
5808 int status;
5809 unsigned *ptr;
fc931582
AA		 5810 struct nfs4_session *session = clp->cl_session;
5811
5812 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5813
848f5bda 5814 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5815 if (status)
5816 goto out;
5817
aacd5537
AA		 5818 /* Init or reset the session slot tables */
5819 status = nfs4_setup_session_slot_tables(session);
5820 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5821 if (status)
5822 goto out;
5823
5824 ptr = (unsigned *)&session->sess_id.data[0];
5825 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5826 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5827out:
5828 dprintk("<-- %s\n", __func__);
5829 return status;
5830}
5831
0f3e66c6
AA		 5832/*
5833 * Issue the over-the-wire RPC DESTROY_SESSION.
5834 * The caller must serialize access to this routine.
5835 */
848f5bda
TM		 5836int nfs4_proc_destroy_session(struct nfs4_session *session,
5837 struct rpc_cred *cred)
0f3e66c6 5838{
848f5bda
TM		 5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5841 .rpc_argp = session,
5842 .rpc_cred = cred,
5843 };
0f3e66c6 5844 int status = 0;
0f3e66c6
AA		 5845
5846 dprintk("--> nfs4_proc_destroy_session\n");
5847
5848 /* session is still being setup */
5849 if (session->clp->cl_cons_state != NFS_CS_READY)
5850 return status;
5851
1bd714f2 5852 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5853
5854 if (status)
08106ac7 5855 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5856 "Session has been destroyed regardless...\n", status);
5857
5858 dprintk("<-- nfs4_proc_destroy_session\n");
5859 return status;
5860}
5861
fc01cea9
AA		 5862/*
5863 * Renew the cl_session lease.
5864 */
d5f8d3fe
TM		 5865struct nfs4_sequence_data {
5866 struct nfs_client *clp;
5867 struct nfs4_sequence_args args;
5868 struct nfs4_sequence_res res;
5869};
5870
dc96aef9
AB		 5871static void nfs41_sequence_release(void *data)
5872{
d5f8d3fe
TM		 5873 struct nfs4_sequence_data *calldata = data;
5874 struct nfs_client *clp = calldata->clp;
dc96aef9 5875
7135840f
AB		 5876 if (atomic_read(&clp->cl_count) > 1)
5877 nfs4_schedule_state_renewal(clp);
5878 nfs_put_client(clp);
d5f8d3fe 5879 kfree(calldata);
dc96aef9
AB		 5880}
5881
aa5190d0
TM		 5882static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5883{
5884 switch(task->tk_status) {
5885 case -NFS4ERR_DELAY:
aa5190d0
TM		 5886 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5887 return -EAGAIN;
5888 default:
0400a6b0 5889 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5890 }
5891 return 0;
5892}
5893
dc96aef9 5894static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5895{
d5f8d3fe
TM		 5896 struct nfs4_sequence_data *calldata = data;
5897 struct nfs_client *clp = calldata->clp;
fc01cea9 5898
14516c3a
TM		 5899 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5900 return;
fc01cea9
AA		 5901
5902 if (task->tk_status < 0) {
5903 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5904 if (atomic_read(&clp->cl_count) == 1)
5905 goto out;
fc01cea9 5906
aa5190d0
TM		 5907 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5908 rpc_restart_call_prepare(task);
fc01cea9
AA		 5909 return;
5910 }
5911 }
fc01cea9 5912 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5913out:
fc01cea9
AA		 5914 dprintk("<-- %s\n", __func__);
5915}
5916
5917static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5918{
d5f8d3fe
TM		 5919 struct nfs4_sequence_data *calldata = data;
5920 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5921 struct nfs4_sequence_args *args;
5922 struct nfs4_sequence_res *res;
5923
fc01cea9
AA		 5924 args = task->tk_msg.rpc_argp;
5925 res = task->tk_msg.rpc_resp;
5926
d9afbd1b 5927 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5928}
5929
5930static const struct rpc_call_ops nfs41_sequence_ops = {
5931 .rpc_call_done = nfs41_sequence_call_done,
5932 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5933 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5934};
5935
8fe72bac
TM		 5936static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5937 struct rpc_cred *cred,
5938 bool is_privileged)
fc01cea9 5939{
d5f8d3fe 5940 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5941 struct rpc_message msg = {
5942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5943 .rpc_cred = cred,
5944 };
71ac6da9
TM		 5945 struct rpc_task_setup task_setup_data = {
5946 .rpc_client = clp->cl_rpcclient,
5947 .rpc_message = &msg,
8fe72bac 5948 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5949 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5950 };
fc01cea9 5951
7135840f 5952 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5953 return ERR_PTR(-EIO);
dfb4f309 5954 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5955 if (calldata == NULL) {
7135840f 5956 nfs_put_client(clp);
71ac6da9 5957 return ERR_PTR(-ENOMEM);
fc01cea9 5958 }
9d12b216 5959 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5960 if (is_privileged)
5961 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5962 msg.rpc_argp = &calldata->args;
5963 msg.rpc_resp = &calldata->res;
5964 calldata->clp = clp;
71ac6da9 5965 task_setup_data.callback_data = calldata;
fc01cea9 5966
71ac6da9
TM		 5967 return rpc_run_task(&task_setup_data);
5968}
5969
2f60ea6b 5970static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5971{
5972 struct rpc_task *task;
5973 int ret = 0;
5974
2f60ea6b
TM		 5975 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5976 return 0;
8fe72bac 5977 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5978 if (IS_ERR(task))
5979 ret = PTR_ERR(task);
5980 else
bf294b41 5981 rpc_put_task_async(task);
71ac6da9
TM		 5982 dprintk("<-- %s status=%d\n", __func__, ret);
5983 return ret;
5984}
5985
5986static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5987{
5988 struct rpc_task *task;
5989 int ret;
5990
8fe72bac 5991 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5992 if (IS_ERR(task)) {
5993 ret = PTR_ERR(task);
5994 goto out;
5995 }
5996 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5997 if (!ret) {
5998 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5999
6000 if (task->tk_status == 0)
6001 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6002 ret = task->tk_status;
b4410c2f 6003 }
71ac6da9
TM		 6004 rpc_put_task(task);
6005out:
6006 dprintk("<-- %s status=%d\n", __func__, ret);
6007 return ret;
fc01cea9
AA		 6008}
6009
fce5c838
RL		 6010struct nfs4_reclaim_complete_data {
6011 struct nfs_client *clp;
6012 struct nfs41_reclaim_complete_args arg;
6013 struct nfs41_reclaim_complete_res res;
6014};
6015
6016static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6017{
6018 struct nfs4_reclaim_complete_data *calldata = data;
6019
d9afbd1b
TM		 6020 nfs41_setup_sequence(calldata->clp->cl_session,
6021 &calldata->arg.seq_args,
6022 &calldata->res.seq_res,
6023 task);
fce5c838
RL		 6024}
6025
aa5190d0
TM		 6026static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6027{
6028 switch(task->tk_status) {
6029 case 0:
6030 case -NFS4ERR_COMPLETE_ALREADY:
6031 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6032 break;
6033 case -NFS4ERR_DELAY:
aa5190d0 6034 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6035 /* fall through */
6036 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6037 return -EAGAIN;
6038 default:
0400a6b0 6039 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6040 }
6041 return 0;
6042}
6043
fce5c838
RL		 6044static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6045{
6046 struct nfs4_reclaim_complete_data *calldata = data;
6047 struct nfs_client *clp = calldata->clp;
6048 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6049
6050 dprintk("--> %s\n", __func__);
14516c3a
TM		 6051 if (!nfs41_sequence_done(task, res))
6052 return;
fce5c838 6053
aa5190d0
TM		 6054 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6055 rpc_restart_call_prepare(task);
6056 return;
6057 }
fce5c838
RL		 6058 dprintk("<-- %s\n", __func__);
6059}
6060
6061static void nfs4_free_reclaim_complete_data(void *data)
6062{
6063 struct nfs4_reclaim_complete_data *calldata = data;
6064
6065 kfree(calldata);
6066}
6067
6068static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6069 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6070 .rpc_call_done = nfs4_reclaim_complete_done,
6071 .rpc_release = nfs4_free_reclaim_complete_data,
6072};
6073
6074/*
6075 * Issue a global reclaim complete.
6076 */
6077static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6078{
6079 struct nfs4_reclaim_complete_data *calldata;
6080 struct rpc_task *task;
6081 struct rpc_message msg = {
6082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6083 };
6084 struct rpc_task_setup task_setup_data = {
6085 .rpc_client = clp->cl_rpcclient,
6086 .rpc_message = &msg,
6087 .callback_ops = &nfs4_reclaim_complete_call_ops,
6088 .flags = RPC_TASK_ASYNC,
6089 };
6090 int status = -ENOMEM;
6091
6092 dprintk("--> %s\n", __func__);
8535b2be 6093 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6094 if (calldata == NULL)
6095 goto out;
6096 calldata->clp = clp;
6097 calldata->arg.one_fs = 0;
fce5c838 6098
9d12b216 6099 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6100 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6101 msg.rpc_argp = &calldata->arg;
6102 msg.rpc_resp = &calldata->res;
6103 task_setup_data.callback_data = calldata;
6104 task = rpc_run_task(&task_setup_data);
acf82b85 6105 if (IS_ERR(task)) {
fce5c838 6106 status = PTR_ERR(task);
acf82b85
DC		 6107 goto out;
6108 }
c34c32ea
AA		 6109 status = nfs4_wait_for_completion_rpc_task(task);
6110 if (status == 0)
6111 status = task->tk_status;
fce5c838 6112 rpc_put_task(task);
acf82b85 6113 return 0;
fce5c838
RL		 6114out:
6115 dprintk("<-- %s status=%d\n", __func__, status);
6116 return status;
6117}
b1f69b75
AA		 6118
6119static void
6120nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6121{
6122 struct nfs4_layoutget *lgp = calldata;
c31663d4 6123 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6124 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6125
6126 dprintk("--> %s\n", __func__);
c31663d4
FI		 6127 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6128 * right now covering the LAYOUTGET we are about to send.
6129 * However, that is not so catastrophic, and there seems
6130 * to be no way to prevent it completely.
6131 */
6ba7db34 6132 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6133 &lgp->res.seq_res, task))
b1f69b75 6134 return;
cf7d63f1
FI		 6135 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6136 NFS_I(lgp->args.inode)->layout,
6137 lgp->args.ctx->state)) {
6138 rpc_exit(task, NFS4_OK);
cf7d63f1 6139 }
b1f69b75
AA		 6140}
6141
6142static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6143{
6144 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6145 struct inode *inode = lgp->args.inode;
6146 struct nfs_server *server = NFS_SERVER(inode);
6147 struct pnfs_layout_hdr *lo;
6148 struct nfs4_state *state = NULL;
30005121 6149 unsigned long timeo, giveup;
b1f69b75
AA		 6150
6151 dprintk("--> %s\n", __func__);
6152
6ba7db34 6153 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6154 goto out;
b1f69b75
AA		 6155
6156 switch (task->tk_status) {
6157 case 0:
ee314c2a 6158 goto out;
b1f69b75
AA		 6159 case -NFS4ERR_LAYOUTTRYLATER:
6160 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6161 timeo = rpc_get_timeout(task->tk_client);
6162 giveup = lgp->args.timestamp + timeo;
6163 if (time_after(giveup, jiffies))
6164 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6165 break;
6166 case -NFS4ERR_EXPIRED:
6167 case -NFS4ERR_BAD_STATEID:
6168 spin_lock(&inode->i_lock);
6169 lo = NFS_I(inode)->layout;
6170 if (!lo || list_empty(&lo->plh_segs)) {
6171 spin_unlock(&inode->i_lock);
6172 /* If the open stateid was bad, then recover it. */
6173 state = lgp->args.ctx->state;
6174 } else {
6175 LIST_HEAD(head);
6176
6177 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6178 spin_unlock(&inode->i_lock);
6179 /* Mark the bad layout state as invalid, then
6180 * retry using the open stateid. */
6181 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6182 }
6183 }
ee314c2a
TM		 6184 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6185 rpc_restart_call_prepare(task);
6186out:
b1f69b75
AA		 6187 dprintk("<-- %s\n", __func__);
6188}
6189
8554116e
IK		 6190static size_t max_response_pages(struct nfs_server *server)
6191{
6192 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6193 return nfs_page_array_len(0, max_resp_sz);
6194}
6195
6196static void nfs4_free_pages(struct page **pages, size_t size)
6197{
6198 int i;
6199
6200 if (!pages)
6201 return;
6202
6203 for (i = 0; i < size; i++) {
6204 if (!pages[i])
6205 break;
6206 __free_page(pages[i]);
6207 }
6208 kfree(pages);
6209}
6210
6211static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6212{
6213 struct page **pages;
6214 int i;
6215
6216 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6217 if (!pages) {
6218 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6219 return NULL;
6220 }
6221
6222 for (i = 0; i < size; i++) {
6223 pages[i] = alloc_page(gfp_flags);
6224 if (!pages[i]) {
6225 dprintk("%s: failed to allocate page\n", __func__);
6226 nfs4_free_pages(pages, size);
6227 return NULL;
6228 }
6229 }
6230
6231 return pages;
6232}
6233
b1f69b75
AA		 6234static void nfs4_layoutget_release(void *calldata)
6235{
6236 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6237 struct inode *inode = lgp->args.inode;
6238 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6239 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6240
6241 dprintk("--> %s\n", __func__);
8554116e 6242 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6243 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6244 put_nfs_open_context(lgp->args.ctx);
6245 kfree(calldata);
6246 dprintk("<-- %s\n", __func__);
6247}
6248
6249static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6250 .rpc_call_prepare = nfs4_layoutget_prepare,
6251 .rpc_call_done = nfs4_layoutget_done,
6252 .rpc_release = nfs4_layoutget_release,
6253};
6254
a0b0a6e3
TM		 6255struct pnfs_layout_segment *
6256nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6257{
a47970ff
WAA		 6258 struct inode *inode = lgp->args.inode;
6259 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6260 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6261 struct rpc_task *task;
6262 struct rpc_message msg = {
6263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6264 .rpc_argp = &lgp->args,
6265 .rpc_resp = &lgp->res,
6266 };
6267 struct rpc_task_setup task_setup_data = {
6268 .rpc_client = server->client,
6269 .rpc_message = &msg,
6270 .callback_ops = &nfs4_layoutget_call_ops,
6271 .callback_data = lgp,
6272 .flags = RPC_TASK_ASYNC,
6273 };
a0b0a6e3 6274 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6275 int status = 0;
6276
6277 dprintk("--> %s\n", __func__);
6278
8554116e
IK		 6279 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6280 if (!lgp->args.layout.pages) {
6281 nfs4_layoutget_release(lgp);
a0b0a6e3 6282 return ERR_PTR(-ENOMEM);
8554116e
IK		 6283 }
6284 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6285 lgp->args.timestamp = jiffies;
8554116e 6286
35124a09 6287 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6288 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6289 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6290
6291 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6292 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6293
b1f69b75
AA		 6294 task = rpc_run_task(&task_setup_data);
6295 if (IS_ERR(task))
a0b0a6e3 6296 return ERR_CAST(task);
b1f69b75 6297 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6298 if (status == 0)
6299 status = task->tk_status;
085b7a45
WAA		 6300 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6301 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6302 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6303 rpc_put_task(task);
6304 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6305 if (status)
6306 return ERR_PTR(status);
6307 return lseg;
b1f69b75
AA		 6308}
6309
cbe82603
BH		 6310static void
6311nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6312{
6313 struct nfs4_layoutreturn *lrp = calldata;
6314
6315 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6316 nfs41_setup_sequence(lrp->clp->cl_session,
6317 &lrp->args.seq_args,
6318 &lrp->res.seq_res,
6319 task);
cbe82603
BH		 6320}
6321
6322static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6323{
6324 struct nfs4_layoutreturn *lrp = calldata;
6325 struct nfs_server *server;
6326
6327 dprintk("--> %s\n", __func__);
6328
6ba7db34 6329 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6330 return;
6331
6332 server = NFS_SERVER(lrp->args.inode);
6333 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6334 rpc_restart_call_prepare(task);
cbe82603
BH		 6335 return;
6336 }
cbe82603
BH		 6337 dprintk("<-- %s\n", __func__);
6338}
6339
6340static void nfs4_layoutreturn_release(void *calldata)
6341{
6342 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6343 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6344
6345 dprintk("--> %s\n", __func__);
849b286f
TM		 6346 spin_lock(&lo->plh_inode->i_lock);
6347 if (lrp->res.lrs_present)
6348 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6349 lo->plh_block_lgets--;
6350 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6351 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6352 kfree(calldata);
6353 dprintk("<-- %s\n", __func__);
6354}
6355
6356static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6357 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6358 .rpc_call_done = nfs4_layoutreturn_done,
6359 .rpc_release = nfs4_layoutreturn_release,
6360};
6361
6362int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6363{
6364 struct rpc_task *task;
6365 struct rpc_message msg = {
6366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6367 .rpc_argp = &lrp->args,
6368 .rpc_resp = &lrp->res,
6369 };
6370 struct rpc_task_setup task_setup_data = {
6371 .rpc_client = lrp->clp->cl_rpcclient,
6372 .rpc_message = &msg,
6373 .callback_ops = &nfs4_layoutreturn_call_ops,
6374 .callback_data = lrp,
6375 };
6376 int status;
6377
6378 dprintk("--> %s\n", __func__);
9d12b216 6379 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6380 task = rpc_run_task(&task_setup_data);
6381 if (IS_ERR(task))
6382 return PTR_ERR(task);
6383 status = task->tk_status;
6384 dprintk("<-- %s status=%d\n", __func__, status);
6385 rpc_put_task(task);
6386 return status;
6387}
6388
7f11d8d3
AA		 6389/*
6390 * Retrieve the list of Data Server devices from the MDS.
6391 */
6392static int _nfs4_getdevicelist(struct nfs_server *server,
6393 const struct nfs_fh *fh,
6394 struct pnfs_devicelist *devlist)
6395{
6396 struct nfs4_getdevicelist_args args = {
6397 .fh = fh,
6398 .layoutclass = server->pnfs_curr_ld->id,
6399 };
6400 struct nfs4_getdevicelist_res res = {
6401 .devlist = devlist,
6402 };
6403 struct rpc_message msg = {
6404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6405 .rpc_argp = &args,
6406 .rpc_resp = &res,
6407 };
6408 int status;
6409
6410 dprintk("--> %s\n", __func__);
6411 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6412 &res.seq_res, 0);
6413 dprintk("<-- %s status=%d\n", __func__, status);
6414 return status;
6415}
6416
6417int nfs4_proc_getdevicelist(struct nfs_server *server,
6418 const struct nfs_fh *fh,
6419 struct pnfs_devicelist *devlist)
6420{
6421 struct nfs4_exception exception = { };
6422 int err;
6423
6424 do {
6425 err = nfs4_handle_exception(server,
6426 _nfs4_getdevicelist(server, fh, devlist),
6427 &exception);
6428 } while (exception.retry);
6429
6430 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6431 err, devlist->num_devs);
6432
6433 return err;
6434}
6435EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6436
b1f69b75
AA		 6437static int
6438_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6439{
6440 struct nfs4_getdeviceinfo_args args = {
6441 .pdev = pdev,
6442 };
6443 struct nfs4_getdeviceinfo_res res = {
6444 .pdev = pdev,
6445 };
6446 struct rpc_message msg = {
6447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6448 .rpc_argp = &args,
6449 .rpc_resp = &res,
6450 };
6451 int status;
6452
6453 dprintk("--> %s\n", __func__);
7c513058 6454 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6455 dprintk("<-- %s status=%d\n", __func__, status);
6456
6457 return status;
6458}
6459
6460int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6461{
6462 struct nfs4_exception exception = { };
6463 int err;
6464
6465 do {
6466 err = nfs4_handle_exception(server,
6467 _nfs4_proc_getdeviceinfo(server, pdev),
6468 &exception);
6469 } while (exception.retry);
6470 return err;
6471}
6472EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6473
863a3c6c
AA		 6474static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6475{
6476 struct nfs4_layoutcommit_data *data = calldata;
6477 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6478 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6479
d9afbd1b
TM		 6480 nfs41_setup_sequence(session,
6481 &data->args.seq_args,
6482 &data->res.seq_res,
6483 task);
863a3c6c
AA		 6484}
6485
6486static void
6487nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6488{
6489 struct nfs4_layoutcommit_data *data = calldata;
6490 struct nfs_server *server = NFS_SERVER(data->args.inode);
6491
6ba7db34 6492 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6493 return;
6494
6495 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6496 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6497 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6498 case -NFS4ERR_BADLAYOUT: /* no layout */
6499 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6500 task->tk_status = 0;
e59d27e0
TM		 6501 break;
6502 case 0:
863a3c6c
AA		 6503 nfs_post_op_update_inode_force_wcc(data->args.inode,
6504 data->res.fattr);
e59d27e0
TM		 6505 break;
6506 default:
6507 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6508 rpc_restart_call_prepare(task);
6509 return;
6510 }
6511 }
863a3c6c
AA		 6512}
6513
6514static void nfs4_layoutcommit_release(void *calldata)
6515{
6516 struct nfs4_layoutcommit_data *data = calldata;
6517
db29c089 6518 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6519 put_rpccred(data->cred);
6520 kfree(data);
6521}
6522
6523static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6524 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6525 .rpc_call_done = nfs4_layoutcommit_done,
6526 .rpc_release = nfs4_layoutcommit_release,
6527};
6528
6529int
ef311537 6530nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6531{
6532 struct rpc_message msg = {
6533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6534 .rpc_argp = &data->args,
6535 .rpc_resp = &data->res,
6536 .rpc_cred = data->cred,
6537 };
6538 struct rpc_task_setup task_setup_data = {
6539 .task = &data->task,
6540 .rpc_client = NFS_CLIENT(data->args.inode),
6541 .rpc_message = &msg,
6542 .callback_ops = &nfs4_layoutcommit_ops,
6543 .callback_data = data,
6544 .flags = RPC_TASK_ASYNC,
6545 };
6546 struct rpc_task *task;
6547 int status = 0;
6548
6549 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6550 "lbw: %llu inode %lu\n",
6551 data->task.tk_pid, sync,
6552 data->args.lastbytewritten,
6553 data->args.inode->i_ino);
6554
9d12b216 6555 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6556 task = rpc_run_task(&task_setup_data);
6557 if (IS_ERR(task))
6558 return PTR_ERR(task);
ef311537 6559 if (sync == false)
863a3c6c
AA		 6560 goto out;
6561 status = nfs4_wait_for_completion_rpc_task(task);
6562 if (status != 0)
6563 goto out;
6564 status = task->tk_status;
6565out:
6566 dprintk("%s: status %d\n", __func__, status);
6567 rpc_put_task(task);
6568 return status;
6569}
fca78d6d
BS		 6570
6571static int
6572_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6573 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6574{
6575 struct nfs41_secinfo_no_name_args args = {
6576 .style = SECINFO_STYLE_CURRENT_FH,
6577 };
6578 struct nfs4_secinfo_res res = {
6579 .flavors = flavors,
6580 };
6581 struct rpc_message msg = {
6582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6583 .rpc_argp = &args,
6584 .rpc_resp = &res,
6585 };
6586 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6587}
6588
6589static int
6590nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6591 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6592{
6593 struct nfs4_exception exception = { };
6594 int err;
6595 do {
6596 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6597 switch (err) {
6598 case 0:
6599 case -NFS4ERR_WRONGSEC:
6600 case -NFS4ERR_NOTSUPP:
05e9cfb4 6601 goto out;
fca78d6d
BS		 6602 default:
6603 err = nfs4_handle_exception(server, err, &exception);
6604 }
6605 } while (exception.retry);
05e9cfb4 6606out:
fca78d6d
BS		 6607 return err;
6608}
6609
6610static int
6611nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6612 struct nfs_fsinfo *info)
6613{
6614 int err;
6615 struct page *page;
6616 rpc_authflavor_t flavor;
6617 struct nfs4_secinfo_flavors *flavors;
6618
6619 page = alloc_page(GFP_KERNEL);
6620 if (!page) {
6621 err = -ENOMEM;
6622 goto out;
6623 }
6624
6625 flavors = page_address(page);
6626 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6627
6628 /*
6629 * Fall back on "guess and check" method if
6630 * the server doesn't support SECINFO_NO_NAME
6631 */
6632 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6633 err = nfs4_find_root_sec(server, fhandle, info);
6634 goto out_freepage;
6635 }
6636 if (err)
6637 goto out_freepage;
6638
6639 flavor = nfs_find_best_sec(flavors);
6640 if (err == 0)
6641 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6642
6643out_freepage:
6644 put_page(page);
6645 if (err == -EACCES)
6646 return -EPERM;
6647out:
6648 return err;
6649}
1cab0652
BS		 6650
6651static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6652{
6653 int status;
6654 struct nfs41_test_stateid_args args = {
1cab0652 6655 .stateid = stateid,
7d974794
BS		 6656 };
6657 struct nfs41_test_stateid_res res;
6658 struct rpc_message msg = {
6659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6660 .rpc_argp = &args,
6661 .rpc_resp = &res,
6662 };
1cab0652 6663
38527b15 6664 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6665 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6666 nfs4_set_sequence_privileged(&args.seq_args);
6667 status = nfs4_call_sync_sequence(server->client, server, &msg,
6668 &args.seq_args, &res.seq_res);
38527b15
CL		 6669 if (status != NFS_OK) {
6670 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6671 return status;
38527b15
CL		 6672 }
6673 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6674 return -res.status;
7d974794
BS		 6675}
6676
38527b15
CL		 6677/**
6678 * nfs41_test_stateid - perform a TEST_STATEID operation
6679 *
6680 * @server: server / transport on which to perform the operation
6681 * @stateid: state ID to test
6682 *
6683 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6684 * Otherwise a negative NFS4ERR value is returned if the operation
6685 * failed or the state ID is not currently valid.
6686 */
1cab0652 6687static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6688{
6689 struct nfs4_exception exception = { };
6690 int err;
6691 do {
377e507d
CL		 6692 err = _nfs41_test_stateid(server, stateid);
6693 if (err != -NFS4ERR_DELAY)
6694 break;
6695 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6696 } while (exception.retry);
6697 return err;
6698}
9aeda35f 6699
1cab0652 6700static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6701{
9aeda35f 6702 struct nfs41_free_stateid_args args = {
1cab0652 6703 .stateid = stateid,
9aeda35f
BS		 6704 };
6705 struct nfs41_free_stateid_res res;
6706 struct rpc_message msg = {
6707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6708 .rpc_argp = &args,
6709 .rpc_resp = &res,
6710 };
38527b15 6711 int status;
9aeda35f 6712
38527b15 6713 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6714 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6715 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6716 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6717 &args.seq_args, &res.seq_res);
38527b15
CL		 6718 dprintk("NFS reply free_stateid: %d\n", status);
6719 return status;
9aeda35f
BS		 6720}
6721
38527b15
CL		 6722/**
6723 * nfs41_free_stateid - perform a FREE_STATEID operation
6724 *
6725 * @server: server / transport on which to perform the operation
6726 * @stateid: state ID to release
6727 *
6728 * Returns NFS_OK if the server freed "stateid". Otherwise a
6729 * negative NFS4ERR value is returned.
6730 */
1cab0652 6731static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6732{
6733 struct nfs4_exception exception = { };
6734 int err;
6735 do {
377e507d
CL		 6736 err = _nfs4_free_stateid(server, stateid);
6737 if (err != -NFS4ERR_DELAY)
6738 break;
6739 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6740 } while (exception.retry);
6741 return err;
6742}
36281caa
TM		 6743
6744static bool nfs41_match_stateid(const nfs4_stateid *s1,
6745 const nfs4_stateid *s2)
6746{
2d2f24ad 6747 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6748 return false;
6749
2d2f24ad 6750 if (s1->seqid == s2->seqid)
36281caa 6751 return true;
2d2f24ad 6752 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6753 return true;
6754
6755 return false;
6756}
6757
557134a3
AA		 6758#endif /* CONFIG_NFS_V4_1 */
6759
36281caa
TM		 6760static bool nfs4_match_stateid(const nfs4_stateid *s1,
6761 const nfs4_stateid *s2)
6762{
f597c537 6763 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6764}
6765
6766
17280175 6767static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6768 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6769 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6770 .recover_open = nfs4_open_reclaim,
6771 .recover_lock = nfs4_lock_reclaim,
591d71cb 6772 .establish_clid = nfs4_init_clientid,
90a16617 6773 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6774 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6775};
6776
591d71cb 6777#if defined(CONFIG_NFS_V4_1)
17280175 6778static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6779 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6780 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6781 .recover_open = nfs4_open_reclaim,
6782 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6783 .establish_clid = nfs41_init_clientid,
b4b82607 6784 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6785 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6786 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6787};
6788#endif /* CONFIG_NFS_V4_1 */
6789
17280175 6790static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6791 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6792 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6793 .recover_open = nfs4_open_expired,
6794 .recover_lock = nfs4_lock_expired,
6795 .establish_clid = nfs4_init_clientid,
90a16617 6796 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6797};
6798
6799#if defined(CONFIG_NFS_V4_1)
17280175 6800static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6801 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6802 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6803 .recover_open = nfs41_open_expired,
6804 .recover_lock = nfs41_lock_expired,
4d643d1d 6805 .establish_clid = nfs41_init_clientid,
b4b82607 6806 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6807};
591d71cb 6808#endif /* CONFIG_NFS_V4_1 */
1da177e4 6809
17280175 6810static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6811 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6812 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6813 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6814};
6815
6816#if defined(CONFIG_NFS_V4_1)
17280175 6817static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6818 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6819 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6820 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6821};
6822#endif
6823
97dc1359
TM		 6824static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6825 .minor_version = 0,
6826 .call_sync = _nfs4_call_sync,
36281caa 6827 .match_stateid = nfs4_match_stateid,
fca78d6d 6828 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6829 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6830 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6831 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6832};
6833
6834#if defined(CONFIG_NFS_V4_1)
6835static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6836 .minor_version = 1,
104287cd 6837 .call_sync = nfs4_call_sync_sequence,
36281caa 6838 .match_stateid = nfs41_match_stateid,
fca78d6d 6839 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6840 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6841 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6842 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6843};
6844#endif
6845
97dc1359
TM		 6846const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6847 [0] = &nfs_v4_0_minor_ops,
6848#if defined(CONFIG_NFS_V4_1)
6849 [1] = &nfs_v4_1_minor_ops,
6850#endif
6851};
6852
73a79706
BS		 6853const struct inode_operations nfs4_dir_inode_operations = {
6854 .create = nfs_create,
6855 .lookup = nfs_lookup,
6856 .atomic_open = nfs_atomic_open,
6857 .link = nfs_link,
6858 .unlink = nfs_unlink,
6859 .symlink = nfs_symlink,
6860 .mkdir = nfs_mkdir,
6861 .rmdir = nfs_rmdir,
6862 .mknod = nfs_mknod,
6863 .rename = nfs_rename,
6864 .permission = nfs_permission,
6865 .getattr = nfs_getattr,
6866 .setattr = nfs_setattr,
6867 .getxattr = generic_getxattr,
6868 .setxattr = generic_setxattr,
6869 .listxattr = generic_listxattr,
6870 .removexattr = generic_removexattr,
6871};
6872
92e1d5be 6873static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6874 .permission = nfs_permission,
6875 .getattr = nfs_getattr,
6876 .setattr = nfs_setattr,
64c2ce8b
AK		 6877 .getxattr = generic_getxattr,
6878 .setxattr = generic_setxattr,
6879 .listxattr = generic_listxattr,
6880 .removexattr = generic_removexattr,
6b3b5496
BF		 6881};
6882
509de811 6883const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6884 .version = 4, /* protocol version */
6885 .dentry_ops = &nfs4_dentry_operations,
6886 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6887 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6888 .file_ops = &nfs4_file_operations,
1da177e4 6889 .getroot = nfs4_proc_get_root,
281cad46 6890 .submount = nfs4_submount,
ff9099f2 6891 .try_mount = nfs4_try_mount,
1da177e4
LT		 6892 .getattr = nfs4_proc_getattr,
6893 .setattr = nfs4_proc_setattr,
6894 .lookup = nfs4_proc_lookup,
6895 .access = nfs4_proc_access,
6896 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6897 .create = nfs4_proc_create,
6898 .remove = nfs4_proc_remove,
6899 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6900 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6901 .unlink_done = nfs4_proc_unlink_done,
6902 .rename = nfs4_proc_rename,
d3d4152a 6903 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6904 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6905 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6906 .link = nfs4_proc_link,
6907 .symlink = nfs4_proc_symlink,
6908 .mkdir = nfs4_proc_mkdir,
6909 .rmdir = nfs4_proc_remove,
6910 .readdir = nfs4_proc_readdir,
6911 .mknod = nfs4_proc_mknod,
6912 .statfs = nfs4_proc_statfs,
6913 .fsinfo = nfs4_proc_fsinfo,
6914 .pathconf = nfs4_proc_pathconf,
e9326dca 6915 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6916 .decode_dirent = nfs4_decode_dirent,
6917 .read_setup = nfs4_proc_read_setup,
1abb5088 6918 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6919 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6920 .read_done = nfs4_read_done,
1da177e4 6921 .write_setup = nfs4_proc_write_setup,
57208fa7 6922 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6923 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6924 .write_done = nfs4_write_done,
1da177e4 6925 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6926 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6927 .commit_done = nfs4_commit_done,
1da177e4 6928 .lock = nfs4_proc_lock,
e50a1c2e 6929 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6930 .close_context = nfs4_close_context,
2b484297 6931 .open_context = nfs4_atomic_open,
011e2a7f 6932 .have_delegation = nfs4_have_delegation,
57ec14c5 6933 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6934 .alloc_client = nfs4_alloc_client,
45a52a02 6935 .init_client = nfs4_init_client,
cdb7eced 6936 .free_client = nfs4_free_client,
1179acc6
BS		 6937 .create_server = nfs4_create_server,
6938 .clone_server = nfs_clone_server,
1da177e4
LT		 6939};
6940
64c2ce8b
AK		 6941static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6942 .prefix = XATTR_NAME_NFSV4_ACL,
6943 .list = nfs4_xattr_list_nfs4_acl,
6944 .get = nfs4_xattr_get_nfs4_acl,
6945 .set = nfs4_xattr_set_nfs4_acl,
6946};
6947
6948const struct xattr_handler *nfs4_xattr_handlers[] = {
6949 &nfs4_xattr_nfs4_acl_handler,
6950 NULL
6951};
6952
1da177e4
LT		 6953/*
6954 * Local variables:
6955 * c-basic-offset: 8
6956 * End:
6957 */
Linux 6.x block layer and io_uring tree(s)