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NFSv4.1: Try to deal with NFS4ERR_SEQ_MISORDERED.
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa
TM		 66#include "nfs4session.h"
67
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
96 return -EREMOTEIO;
7ebb9315
BS		 97 case -NFS4ERR_WRONGSEC:
98 return -EPERM;
3ddeb7c5
TM		 99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
101 return -EINVAL;
fb13bfa7
TM		 102 case -NFS4ERR_SHARE_DENIED:
103 return -EACCES;
f25efd85
SD		 104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
6168f62c
WAA		 106 case -NFS4ERR_ACCESS:
107 return -EACCES;
52567b03 108 default:
1da177e4 109 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 110 __func__, -err);
52567b03 111 break;
1da177e4 112 }
52567b03 113 return -EIO;
1da177e4
LT		 114}
115
116/*
117 * This is our standard bitmap for GETATTR requests.
118 */
1549210f 119const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 120 FATTR4_WORD0_TYPE
121 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_SIZE
123 | FATTR4_WORD0_FSID
124 | FATTR4_WORD0_FILEID,
125 FATTR4_WORD1_MODE
126 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
134};
135
1549210f
TM		 136static const u32 nfs4_pnfs_open_bitmap[3] = {
137 FATTR4_WORD0_TYPE
138 | FATTR4_WORD0_CHANGE
139 | FATTR4_WORD0_SIZE
140 | FATTR4_WORD0_FSID
141 | FATTR4_WORD0_FILEID,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
152};
153
e23008ec
AA		 154static const u32 nfs4_open_noattr_bitmap[3] = {
155 FATTR4_WORD0_TYPE
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
158};
159
1da177e4
LT		 160const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
167};
168
4ce79717 169const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 170 FATTR4_WORD0_MAXLINK
171 | FATTR4_WORD0_MAXNAME,
172 0
173};
174
dae100c2 175const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
55b6e774 179 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 182};
183
830b8e33
MN		 184const u32 nfs4_fs_locations_bitmap[2] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
201};
202
bc4785cd 203static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 204 struct nfs4_readdir_arg *readdir)
205{
0dbb4c67 206 __be32 *start, *p;
1da177e4 207
1da177e4 208 if (cookie > 2) {
b7ef1956 209 readdir->cookie = cookie;
1da177e4
LT		 210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
211 return;
212 }
213
214 readdir->cookie = 0;
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
216 if (cookie == 2)
217 return;
218
219 /*
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
224 * instead of 1 or 2.
225 */
2b86ce2d 226 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 227
228 if (cookie == 0) {
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
234 p++;
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
4e769b93 238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 239 }
240
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
246 p++;
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
4e769b93 250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 251
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
2b86ce2d 254 kunmap_atomic(start);
1da177e4
LT		 255}
256
65de872e
TM		 257static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
258{
259 int res = 0;
260
261 might_sleep();
262
263 if (*timeout <= 0)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 267 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 268 if (fatal_signal_pending(current))
269 res = -ERESTARTSYS;
270 *timeout <<= 1;
271 return res;
272}
273
274/* This is the error handling routine for processes that are allowed
275 * to sleep.
276 */
b064eca2 277static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 278{
279 struct nfs_client *clp = server->nfs_client;
9e33bed5 280 struct nfs4_state *state = exception->state;
3114ea7a 281 struct inode *inode = exception->inode;
65de872e
TM		 282 int ret = errorcode;
283
284 exception->retry = 0;
285 switch(errorcode) {
286 case 0:
287 return 0;
3114ea7a 288 case -NFS4ERR_OPENMODE:
011e2a7f 289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 290 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 291 exception->retry = 1;
292 return 0;
293 }
294 if (state == NULL)
295 break;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
a1d0b5ee 298 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 301 if (state == NULL)
302 break;
14977489 303 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
0ced63d1
TM		 306 case -NFS4ERR_EXPIRED:
307 if (state != NULL)
308 nfs4_schedule_stateid_recovery(server, state);
65de872e 309 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 310 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
03391693 313#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
322 errorcode);
9f594791 323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 324 goto wait_on_recovery;
03391693 325#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 326 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
329 * fail
330 */
331 ret = -EBUSY;
332 break;
333 }
65de872e
TM		 334 case -NFS4ERR_GRACE:
335 case -NFS4ERR_DELAY:
336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
d185a334 381static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 382{
e3725ec0 383 struct nfs4_session *session;
13615871 384 struct nfs4_slot_table *tbl;
c10e4498 385 bool send_new_highest_used_slotid = false;
13615871 386
dfb4f309 387 if (!res->sr_slot) {
13615871
AA		 388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
691daf3b 390 dprintk("%s: No slot\n", __func__);
35dc1d74 391 return;
13615871 392 }
e3725ec0
TM		 393 tbl = res->sr_slot->table;
394 session = tbl->session;
ea028ac9 395
35dc1d74 396 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
399 */
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
402
b75ad4cd
TM		 403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
405 goto out_unlock;
406 }
f4af6e2a 407 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 408
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
b75ad4cd 411out_unlock:
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
b0df806c 422 unsigned long timestamp;
14516c3a 423 struct nfs_client *clp;
85563073 424 int ret = 1;
b0df806c
AA		 425
426 /*
427 * sr_status remains 1 if an RPC level error occurred. The server
428 * may or may not have processed the sequence operation..
429 * Proceed as if the server received and processed the sequence
430 * operation.
431 */
432 if (res->sr_status == 1)
433 res->sr_status = NFS_OK;
434
468f8613
BS		 435 /* don't increment the sequence number if the task wasn't sent */
436 if (!RPC_WAS_SENT(task))
b0df806c
AA		 437 goto out;
438
933602e3 439 slot = res->sr_slot;
e3725ec0 440 session = slot->table->session;
933602e3 441
691daf3b 442 /* Check the SEQUENCE operation status */
14516c3a
TM		 443 switch (res->sr_status) {
444 case 0:
b0df806c 445 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 446 ++slot->seq_nr;
447 timestamp = slot->renewal_time;
e3725ec0 448 clp = session->clp;
452e9352 449 do_renew_lease(clp, timestamp);
0629e370 450 /* Check sequence flags */
b4410c2f
TM		 451 if (res->sr_status_flags != 0)
452 nfs4_schedule_lease_recovery(clp);
464ee9f9 453 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a
TM		 454 break;
455 case -NFS4ERR_DELAY:
456 /* The server detected a resend of the RPC call and
457 * returned NFS4ERR_DELAY as per Section 2.10.6.2
458 * of RFC5661.
459 */
df2fabff 460 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 461 __func__,
df2fabff 462 slot->slot_nr,
933602e3 463 slot->seq_nr);
14516c3a 464 goto out_retry;
85563073
TM		 465 case -NFS4ERR_BADSLOT:
466 /*
467 * The slot id we used was probably retired. Try again
468 * using a different slot id.
469 */
e8794440
TM		 470 goto retry_nowait;
471 case -NFS4ERR_SEQ_MISORDERED:
472 /*
473 * Could this slot have been previously retired?
474 * If so, then the server may be expecting seq_nr = 1!
475 */
476 if (slot->seq_nr == 1)
477 break;
478 slot->seq_nr = 1;
479 goto retry_nowait;
480 case -NFS4ERR_SEQ_FALSE_RETRY:
481 ++slot->seq_nr;
482 goto retry_nowait;
14516c3a
TM		 483 default:
484 /* Just update the slot sequence no. */
933602e3 485 ++slot->seq_nr;
b0df806c
AA		 486 }
487out:
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 490 nfs41_sequence_free_slot(res);
85563073 491 return ret;
e8794440
TM		 492retry_nowait:
493 if (rpc_restart_call_prepare(task)) {
494 task->tk_status = 0;
495 ret = 0;
496 }
497 goto out;
14516c3a 498out_retry:
d05dd4e9 499 if (!rpc_restart_call(task))
14516c3a
TM		 500 goto out;
501 rpc_delay(task, NFS4_POLL_RETRY_MAX);
502 return 0;
b0df806c
AA		 503}
504
14516c3a
TM		 505static int nfs4_sequence_done(struct rpc_task *task,
506 struct nfs4_sequence_res *res)
df896455 507{
e3725ec0 508 if (res->sr_slot == NULL)
14516c3a
TM		 509 return 1;
510 return nfs41_sequence_done(task, res);
df896455
TM		 511}
512
9d12b216
TM		 513static void nfs41_init_sequence(struct nfs4_sequence_args *args,
514 struct nfs4_sequence_res *res, int cache_reply)
515{
2b2fa717 516 args->sa_slot = NULL;
9d12b216 517 args->sa_cache_this = 0;
8fe72bac 518 args->sa_privileged = 0;
9d12b216
TM		 519 if (cache_reply)
520 args->sa_cache_this = 1;
9d12b216
TM		 521 res->sr_slot = NULL;
522}
523
8fe72bac
TM		 524static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
525{
526 args->sa_privileged = 1;
527}
528
dc70d7b3 529int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 530 struct nfs4_sequence_args *args,
531 struct nfs4_sequence_res *res,
ce5039c1
AA		 532 struct rpc_task *task)
533{
fbcd4abc
AA		 534 struct nfs4_slot *slot;
535 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 536
537 dprintk("--> %s\n", __func__);
ce5039c1 538 /* slot already allocated? */
dfb4f309 539 if (res->sr_slot != NULL)
d9afbd1b 540 goto out_success;
ce5039c1 541
fbcd4abc
AA		 542 tbl = &session->fc_slot_table;
543
69d206b5
TM		 544 task->tk_timeout = 0;
545
fbcd4abc 546 spin_lock(&tbl->slot_tbl_lock);
a2118c33 547 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 548 !args->sa_privileged) {
0b1c8fc4 549 /* The state manager will wait until the slot table is empty */
0b1c8fc4 550 dprintk("%s session is draining\n", __func__);
7b939a3f 551 goto out_sleep;
689cf5c1
AB		 552 }
553
2dc03b7f 554 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 555 if (IS_ERR(slot)) {
556 /* If out of memory, try again in 1/4 second */
557 if (slot == ERR_PTR(-ENOMEM))
558 task->tk_timeout = HZ >> 2;
fbcd4abc 559 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 560 goto out_sleep;
fbcd4abc
AA		 561 }
562 spin_unlock(&tbl->slot_tbl_lock);
563
2b2fa717 564 args->sa_slot = slot;
fbcd4abc 565
2dc03b7f
TM		 566 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
567 slot->slot_nr, slot->seq_nr);
fbcd4abc 568
dfb4f309 569 res->sr_slot = slot;
2a6e26cd 570 res->sr_status_flags = 0;
fbcd4abc
AA		 571 /*
572 * sr_status is only set in decode_sequence, and so will remain
573 * set to 1 if an rpc level failure occurs.
574 */
575 res->sr_status = 1;
d9afbd1b
TM		 576out_success:
577 rpc_call_start(task);
ce5039c1 578 return 0;
7b939a3f 579out_sleep:
8fe72bac
TM		 580 /* Privileged tasks are queued with top priority */
581 if (args->sa_privileged)
1e1093c7
TM		 582 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
583 NULL, RPC_PRIORITY_PRIVILEGED);
584 else
585 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 586 spin_unlock(&tbl->slot_tbl_lock);
587 return -EAGAIN;
ce5039c1 588}
dc70d7b3 589EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 590
035168ab 591int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 592 struct nfs4_sequence_args *args,
593 struct nfs4_sequence_res *res,
ce5039c1
AA		 594 struct rpc_task *task)
595{
035168ab 596 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 597 int ret = 0;
598
d9afbd1b
TM		 599 if (session == NULL) {
600 rpc_call_start(task);
035168ab 601 goto out;
d9afbd1b 602 }
035168ab 603
df2fabff 604 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 605 __func__, session->clp, session, res->sr_slot ?
df2fabff 606 res->sr_slot->slot_nr : -1);
ce5039c1 607
9d12b216 608 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 609out:
610 dprintk("<-- %s status=%d\n", __func__, ret);
611 return ret;
612}
613
614struct nfs41_call_sync_data {
035168ab 615 const struct nfs_server *seq_server;
ce5039c1
AA		 616 struct nfs4_sequence_args *seq_args;
617 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 618};
619
620static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
621{
622 struct nfs41_call_sync_data *data = calldata;
6ba7db34 623 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 624
035168ab
TM		 625 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
626
d9afbd1b 627 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 628}
629
69ab40c4
AA		 630static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
631{
632 struct nfs41_call_sync_data *data = calldata;
633
14516c3a 634 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 635}
636
17280175 637static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 638 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 639 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 640};
641
7c513058
BS		 642static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
643 struct nfs_server *server,
ce5039c1
AA		 644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
8fe72bac 646 struct nfs4_sequence_res *res)
ce5039c1
AA		 647{
648 int ret;
649 struct rpc_task *task;
650 struct nfs41_call_sync_data data = {
035168ab 651 .seq_server = server,
ce5039c1
AA		 652 .seq_args = args,
653 .seq_res = res,
ce5039c1
AA		 654 };
655 struct rpc_task_setup task_setup = {
7c513058 656 .rpc_client = clnt,
ce5039c1
AA		 657 .rpc_message = msg,
658 .callback_ops = &nfs41_call_sync_ops,
659 .callback_data = &data
660 };
661
ce5039c1
AA		 662 task = rpc_run_task(&task_setup);
663 if (IS_ERR(task))
664 ret = PTR_ERR(task);
665 else {
666 ret = task->tk_status;
667 rpc_put_task(task);
668 }
669 return ret;
670}
671
df896455 672#else
8fe72bac 673static
9d12b216
TM		 674void nfs41_init_sequence(struct nfs4_sequence_args *args,
675 struct nfs4_sequence_res *res, int cache_reply)
676{
677}
678
8fe72bac
TM		 679static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
680{
681}
682
683
14516c3a
TM		 684static int nfs4_sequence_done(struct rpc_task *task,
685 struct nfs4_sequence_res *res)
df896455 686{
14516c3a 687 return 1;
df896455 688}
cccef3b9
AA		 689#endif /* CONFIG_NFS_V4_1 */
690
fd0c0953 691static
7c513058
BS		 692int _nfs4_call_sync(struct rpc_clnt *clnt,
693 struct nfs_server *server,
cccef3b9
AA		 694 struct rpc_message *msg,
695 struct nfs4_sequence_args *args,
fd0c0953 696 struct nfs4_sequence_res *res)
cccef3b9 697{
7c513058 698 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 699}
700
fd0c0953 701static
7c513058
BS		 702int nfs4_call_sync(struct rpc_clnt *clnt,
703 struct nfs_server *server,
e73b83f2
BS		 704 struct rpc_message *msg,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 int cache_reply)
708{
fd0c0953 709 nfs41_init_sequence(args, res, cache_reply);
7c513058 710 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 711 args, res);
e73b83f2 712}
cccef3b9 713
38478b24 714static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 715{
38478b24 716 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 717
38478b24 718 spin_lock(&dir->i_lock);
359d7d1c 719 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 720 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 721 nfs_force_lookup_revalidate(dir);
a9a4a87a 722 dir->i_version = cinfo->after;
38478b24 723 spin_unlock(&dir->i_lock);
1da177e4
LT		 724}
725
e56e0b78 726struct nfs4_opendata {
c6d00e63 727 struct kref kref;
e56e0b78
TM		 728 struct nfs_openargs o_arg;
729 struct nfs_openres o_res;
cdd4e68b
TM		 730 struct nfs_open_confirmargs c_arg;
731 struct nfs_open_confirmres c_res;
6926afd1
TM		 732 struct nfs4_string owner_name;
733 struct nfs4_string group_name;
e56e0b78 734 struct nfs_fattr f_attr;
e56e0b78 735 struct dentry *dir;
82a2c1b7 736 struct dentry *dentry;
e56e0b78 737 struct nfs4_state_owner *owner;
aac00a8d 738 struct nfs4_state *state;
e56e0b78 739 struct iattr attrs;
26e976a8 740 unsigned long timestamp;
3e309914 741 unsigned int rpc_done : 1;
24ac23ab
TM		 742 int rpc_status;
743 int cancelled;
e56e0b78
TM		 744};
745
2ced46c2
TM		 746
747static void nfs4_init_opendata_res(struct nfs4_opendata *p)
748{
749 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 750 p->o_res.seqid = p->o_arg.seqid;
751 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 752 p->o_res.server = p->o_arg.server;
5f657530 753 p->o_res.access_request = p->o_arg.access;
2ced46c2 754 nfs_fattr_init(&p->f_attr);
6926afd1 755 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 756}
757
82a2c1b7 758static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 759 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 760 const struct iattr *attrs,
761 gfp_t gfp_mask)
e56e0b78 762{
82a2c1b7 763 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 764 struct inode *dir = parent->d_inode;
765 struct nfs_server *server = NFS_SERVER(dir);
766 struct nfs4_opendata *p;
767
8535b2be 768 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 769 if (p == NULL)
770 goto err;
8535b2be 771 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 772 if (p->o_arg.seqid == NULL)
773 goto err_free;
82a2c1b7
AV		 774 nfs_sb_active(dentry->d_sb);
775 p->dentry = dget(dentry);
e56e0b78
TM		 776 p->dir = parent;
777 p->owner = sp;
778 atomic_inc(&sp->so_count);
779 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 780 p->o_arg.open_flags = flags;
781 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 782 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
783 * will return permission denied for all bits until close */
784 if (!(flags & O_EXCL)) {
785 /* ask server to check for all possible rights as results
786 * are cached */
787 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
788 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 789 }
7539bbab 790 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 791 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
792 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 793 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 794 p->o_arg.server = server;
795 p->o_arg.bitmask = server->attr_bitmask;
1549210f 796 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 797 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 798 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 799 __be32 verf[2];
d77d76ff 800
e56e0b78
TM		 801 p->o_arg.u.attrs = &p->attrs;
802 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 803
804 verf[0] = jiffies;
805 verf[1] = current->pid;
806 memcpy(p->o_arg.u.verifier.data, verf,
807 sizeof(p->o_arg.u.verifier.data));
e56e0b78 808 }
cdd4e68b
TM		 809 p->c_arg.fh = &p->o_res.fh;
810 p->c_arg.stateid = &p->o_res.stateid;
811 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 812 nfs4_init_opendata_res(p);
c6d00e63 813 kref_init(&p->kref);
e56e0b78
TM		 814 return p;
815err_free:
816 kfree(p);
817err:
818 dput(parent);
819 return NULL;
820}
821
c6d00e63 822static void nfs4_opendata_free(struct kref *kref)
e56e0b78 823{
c6d00e63
TM		 824 struct nfs4_opendata *p = container_of(kref,
825 struct nfs4_opendata, kref);
82a2c1b7 826 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 827
828 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 829 if (p->state != NULL)
830 nfs4_put_open_state(p->state);
c6d00e63
TM		 831 nfs4_put_state_owner(p->owner);
832 dput(p->dir);
82a2c1b7
AV		 833 dput(p->dentry);
834 nfs_sb_deactive(sb);
6926afd1 835 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 836 kfree(p);
837}
838
839static void nfs4_opendata_put(struct nfs4_opendata *p)
840{
841 if (p != NULL)
842 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 843}
844
06f814a3
TM		 845static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
846{
06f814a3
TM		 847 int ret;
848
06f814a3 849 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 850 return ret;
851}
852
dc0b027d 853static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 854{
855 int ret = 0;
dc0b027d 856
536e43d1 857 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 858 goto out;
859 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 860 case FMODE_READ:
88069f77
TM		 861 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
862 && state->n_rdonly != 0;
6ee41268
TM		 863 break;
864 case FMODE_WRITE:
88069f77
TM		 865 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
866 && state->n_wronly != 0;
6ee41268
TM		 867 break;
868 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 869 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
870 && state->n_rdwr != 0;
6ee41268 871 }
dc0b027d 872out:
6ee41268
TM		 873 return ret;
874}
875
dc0b027d 876static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 877{
652f89f6
TM		 878 if (delegation == NULL)
879 return 0;
dc0b027d 880 if ((delegation->type & fmode) != fmode)
aac00a8d 881 return 0;
15c831bf 882 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 883 return 0;
b7391f44 884 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 885 return 1;
886}
887
dc0b027d 888static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 889{
dc0b027d 890 switch (fmode) {
e7616923
TM		 891 case FMODE_WRITE:
892 state->n_wronly++;
893 break;
894 case FMODE_READ:
895 state->n_rdonly++;
896 break;
897 case FMODE_READ|FMODE_WRITE:
898 state->n_rdwr++;
899 }
dc0b027d 900 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 901}
902
dc0b027d 903static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 904{
905 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 906 nfs4_stateid_copy(&state->stateid, stateid);
907 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 908 switch (fmode) {
003707c7
TM		 909 case FMODE_READ:
910 set_bit(NFS_O_RDONLY_STATE, &state->flags);
911 break;
912 case FMODE_WRITE:
913 set_bit(NFS_O_WRONLY_STATE, &state->flags);
914 break;
915 case FMODE_READ|FMODE_WRITE:
916 set_bit(NFS_O_RDWR_STATE, &state->flags);
917 }
e7616923
TM		 918}
919
dc0b027d 920static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 921{
8bda4e4c 922 write_seqlock(&state->seqlock);
dc0b027d 923 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 924 write_sequnlock(&state->seqlock);
003707c7
TM		 925}
926
dc0b027d 927static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 928{
8bda4e4c
TM		 929 /*
930 * Protect the call to nfs4_state_set_mode_locked and
931 * serialise the stateid update
932 */
933 write_seqlock(&state->seqlock);
003707c7 934 if (deleg_stateid != NULL) {
f597c537 935 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 936 set_bit(NFS_DELEGATED_STATE, &state->flags);
937 }
938 if (open_stateid != NULL)
dc0b027d 939 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 940 write_sequnlock(&state->seqlock);
941 spin_lock(&state->owner->so_lock);
dc0b027d 942 update_open_stateflags(state, fmode);
ec073428 943 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 944}
945
dc0b027d 946static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 947{
948 struct nfs_inode *nfsi = NFS_I(state->inode);
949 struct nfs_delegation *deleg_cur;
950 int ret = 0;
951
dc0b027d 952 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 953
954 rcu_read_lock();
955 deleg_cur = rcu_dereference(nfsi->delegation);
956 if (deleg_cur == NULL)
957 goto no_delegation;
958
959 spin_lock(&deleg_cur->lock);
960 if (nfsi->delegation != deleg_cur ||
dc0b027d 961 (deleg_cur->type & fmode) != fmode)
34310430
TM		 962 goto no_delegation_unlock;
963
964 if (delegation == NULL)
965 delegation = &deleg_cur->stateid;
f597c537 966 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 967 goto no_delegation_unlock;
968
b7391f44 969 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 970 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 971 ret = 1;
972no_delegation_unlock:
973 spin_unlock(&deleg_cur->lock);
974no_delegation:
975 rcu_read_unlock();
976
977 if (!ret && open_stateid != NULL) {
dc0b027d 978 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 979 ret = 1;
980 }
981
982 return ret;
983}
984
985
dc0b027d 986static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 987{
988 struct nfs_delegation *delegation;
989
990 rcu_read_lock();
991 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 992 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 993 rcu_read_unlock();
994 return;
995 }
996 rcu_read_unlock();
57ec14c5 997 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 998}
999
6ee41268 1000static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1001{
1002 struct nfs4_state *state = opendata->state;
1003 struct nfs_inode *nfsi = NFS_I(state->inode);
1004 struct nfs_delegation *delegation;
536e43d1 1005 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1006 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1007 nfs4_stateid stateid;
1008 int ret = -EAGAIN;
1009
aac00a8d 1010 for (;;) {
dc0b027d 1011 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1012 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1013 if (can_open_cached(state, fmode, open_mode)) {
1014 update_open_stateflags(state, fmode);
6ee41268 1015 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1016 goto out_return_state;
1017 }
1018 spin_unlock(&state->owner->so_lock);
1019 }
34310430
TM		 1020 rcu_read_lock();
1021 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1022 if (!can_open_delegated(delegation, fmode)) {
34310430 1023 rcu_read_unlock();
aac00a8d 1024 break;
34310430 1025 }
aac00a8d 1026 /* Save the delegation */
f597c537 1027 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1028 rcu_read_unlock();
af22f94a 1029 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1030 if (ret != 0)
1031 goto out;
1032 ret = -EAGAIN;
34310430
TM		 1033
1034 /* Try to update the stateid using the delegation */
dc0b027d 1035 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1036 goto out_return_state;
aac00a8d 1037 }
aac00a8d
TM		 1038out:
1039 return ERR_PTR(ret);
1040out_return_state:
1041 atomic_inc(&state->count);
1042 return state;
1043}
1044
e23008ec
AA		 1045static void
1046nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1047{
1048 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1049 struct nfs_delegation *delegation;
1050 int delegation_flags = 0;
1051
1052 rcu_read_lock();
1053 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1054 if (delegation)
1055 delegation_flags = delegation->flags;
1056 rcu_read_unlock();
1057 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1058 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1059 "returning a delegation for "
1060 "OPEN(CLAIM_DELEGATE_CUR)\n",
1061 clp->cl_hostname);
1062 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1063 nfs_inode_set_delegation(state->inode,
1064 data->owner->so_cred,
1065 &data->o_res);
1066 else
1067 nfs_inode_reclaim_delegation(state->inode,
1068 data->owner->so_cred,
1069 &data->o_res);
1070}
1071
1072/*
1073 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1074 * and update the nfs4_state.
1075 */
1076static struct nfs4_state *
1077_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1078{
1079 struct inode *inode = data->state->inode;
1080 struct nfs4_state *state = data->state;
1081 int ret;
1082
1083 if (!data->rpc_done) {
1084 ret = data->rpc_status;
1085 goto err;
1086 }
1087
1088 ret = -ESTALE;
1089 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1090 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1091 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1092 goto err;
1093
1094 ret = -ENOMEM;
1095 state = nfs4_get_open_state(inode, data->owner);
1096 if (state == NULL)
1097 goto err;
1098
1099 ret = nfs_refresh_inode(inode, &data->f_attr);
1100 if (ret)
1101 goto err;
1102
1103 if (data->o_res.delegation_type != 0)
1104 nfs4_opendata_check_deleg(data, state);
1105 update_open_stateid(state, &data->o_res.stateid, NULL,
1106 data->o_arg.fmode);
1107
1108 return state;
1109err:
1110 return ERR_PTR(ret);
1111
1112}
1113
1114static struct nfs4_state *
1115_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1116{
1117 struct inode *inode;
1118 struct nfs4_state *state = NULL;
1b370bc2 1119 int ret;
24ac23ab 1120
aac00a8d 1121 if (!data->rpc_done) {
6ee41268 1122 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1123 goto out;
1124 }
1125
1b370bc2 1126 ret = -EAGAIN;
24ac23ab 1127 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1128 goto err;
24ac23ab 1129 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1130 ret = PTR_ERR(inode);
03f28e3a 1131 if (IS_ERR(inode))
1b370bc2
TM		 1132 goto err;
1133 ret = -ENOMEM;
24ac23ab
TM		 1134 state = nfs4_get_open_state(inode, data->owner);
1135 if (state == NULL)
1b370bc2 1136 goto err_put_inode;
e23008ec
AA		 1137 if (data->o_res.delegation_type != 0)
1138 nfs4_opendata_check_deleg(data, state);
34310430 1139 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1140 data->o_arg.fmode);
24ac23ab 1141 iput(inode);
aac00a8d 1142out:
24ac23ab 1143 return state;
1b370bc2
TM		 1144err_put_inode:
1145 iput(inode);
1146err:
1147 return ERR_PTR(ret);
24ac23ab
TM		 1148}
1149
e23008ec
AA		 1150static struct nfs4_state *
1151nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1152{
1153 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1154 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1155 return _nfs4_opendata_to_nfs4_state(data);
1156}
1157
864472e9
TM		 1158static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1159{
1160 struct nfs_inode *nfsi = NFS_I(state->inode);
1161 struct nfs_open_context *ctx;
1162
1163 spin_lock(&state->inode->i_lock);
1164 list_for_each_entry(ctx, &nfsi->open_files, list) {
1165 if (ctx->state != state)
1166 continue;
1167 get_nfs_open_context(ctx);
1168 spin_unlock(&state->inode->i_lock);
1169 return ctx;
1170 }
1171 spin_unlock(&state->inode->i_lock);
1172 return ERR_PTR(-ENOENT);
1173}
1174
6f220ed5
TM		 1175static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1176{
1177 struct nfs4_opendata *opendata;
1178
3d4ff43d 1179 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1180 if (opendata == NULL)
1181 return ERR_PTR(-ENOMEM);
1182 opendata->state = state;
1183 atomic_inc(&state->count);
1184 return opendata;
1185}
1186
dc0b027d 1187static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1188{
2ced46c2 1189 struct nfs4_state *newstate;
864472e9
TM		 1190 int ret;
1191
dc0b027d
TM		 1192 opendata->o_arg.open_flags = 0;
1193 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1194 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1195 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1196 nfs4_init_opendata_res(opendata);
b257957e 1197 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1198 if (ret != 0)
1199 return ret;
2ced46c2 1200 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1201 if (IS_ERR(newstate))
1202 return PTR_ERR(newstate);
643168c2 1203 nfs4_close_state(newstate, fmode);
2ced46c2 1204 *res = newstate;
864472e9
TM		 1205 return 0;
1206}
1207
1208static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1209{
864472e9 1210 struct nfs4_state *newstate;
864472e9
TM		 1211 int ret;
1212
1213 /* memory barrier prior to reading state->n_* */
2ced46c2 1214 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1215 smp_rmb();
1216 if (state->n_rdwr != 0) {
b0ed9dbc 1217 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1218 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1219 if (ret != 0)
1220 return ret;
2ced46c2
TM		 1221 if (newstate != state)
1222 return -ESTALE;
864472e9
TM		 1223 }
1224 if (state->n_wronly != 0) {
b0ed9dbc 1225 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1226 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1227 if (ret != 0)
1228 return ret;
2ced46c2
TM		 1229 if (newstate != state)
1230 return -ESTALE;
864472e9
TM		 1231 }
1232 if (state->n_rdonly != 0) {
b0ed9dbc 1233 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1234 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1235 if (ret != 0)
1236 return ret;
2ced46c2
TM		 1237 if (newstate != state)
1238 return -ESTALE;
864472e9 1239 }
1ac7e2fd
TM		 1240 /*
1241 * We may have performed cached opens for all three recoveries.
1242 * Check if we need to update the current stateid.
1243 */
1244 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1245 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1246 write_seqlock(&state->seqlock);
1ac7e2fd 1247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1248 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1249 write_sequnlock(&state->seqlock);
1ac7e2fd 1250 }
864472e9
TM		 1251 return 0;
1252}
1253
1da177e4
LT		 1254/*
1255 * OPEN_RECLAIM:
1256 * reclaim state on the server after a reboot.
1da177e4 1257 */
539cd03a 1258static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1259{
1ac7e2fd 1260 struct nfs_delegation *delegation;
864472e9 1261 struct nfs4_opendata *opendata;
dc0b027d 1262 fmode_t delegation_type = 0;
1da177e4
LT		 1263 int status;
1264
6f220ed5
TM		 1265 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1266 if (IS_ERR(opendata))
1267 return PTR_ERR(opendata);
864472e9
TM		 1268 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1269 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1270 rcu_read_lock();
1271 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1272 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1273 delegation_type = delegation->type;
1ac7e2fd 1274 rcu_read_unlock();
864472e9
TM		 1275 opendata->o_arg.u.delegation_type = delegation_type;
1276 status = nfs4_open_recover(opendata, state);
c6d00e63 1277 nfs4_opendata_put(opendata);
1da177e4
LT		 1278 return status;
1279}
1280
539cd03a 1281static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1282{
1283 struct nfs_server *server = NFS_SERVER(state->inode);
1284 struct nfs4_exception exception = { };
1285 int err;
1286 do {
539cd03a 1287 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1288 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1289 break;
1290 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1291 } while (exception.retry);
1292 return err;
1293}
1294
864472e9
TM		 1295static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1296{
1297 struct nfs_open_context *ctx;
1298 int ret;
1299
1300 ctx = nfs4_state_find_open_context(state);
1301 if (IS_ERR(ctx))
1302 return PTR_ERR(ctx);
539cd03a 1303 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1304 put_nfs_open_context(ctx);
1305 return ret;
1306}
1307
13437e12 1308static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1309{
e56e0b78 1310 struct nfs4_opendata *opendata;
864472e9 1311 int ret;
1da177e4 1312
6f220ed5
TM		 1313 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1314 if (IS_ERR(opendata))
1315 return PTR_ERR(opendata);
e56e0b78 1316 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1317 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1318 ret = nfs4_open_recover(opendata, state);
c6d00e63 1319 nfs4_opendata_put(opendata);
864472e9 1320 return ret;
1da177e4
LT		 1321}
1322
13437e12 1323int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1324{
1325 struct nfs4_exception exception = { };
539cd03a 1326 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1327 int err;
1328 do {
13437e12 1329 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1330 switch (err) {
1331 case 0:
965b5d67
TM		 1332 case -ENOENT:
1333 case -ESTALE:
1334 goto out;
bcfa49f6
RL		 1335 case -NFS4ERR_BADSESSION:
1336 case -NFS4ERR_BADSLOT:
1337 case -NFS4ERR_BAD_HIGH_SLOT:
1338 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1339 case -NFS4ERR_DEADSESSION:
9f594791 1340 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1341 goto out;
1da177e4
LT		 1342 case -NFS4ERR_STALE_CLIENTID:
1343 case -NFS4ERR_STALE_STATEID:
1344 case -NFS4ERR_EXPIRED:
1345 /* Don't recall a delegation if it was lost */
0400a6b0 1346 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1347 goto out;
1348 case -ERESTARTSYS:
1349 /*
1350 * The show must go on: exit, but mark the
1351 * stateid as needing recovery.
1352 */
a1d0b5ee 1353 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1354 case -NFS4ERR_ADMIN_REVOKED:
1355 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1356 nfs_inode_find_state_and_recover(state->inode,
1357 stateid);
0400a6b0 1358 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1359 case -ENOMEM:
1360 err = 0;
1361 goto out;
1da177e4
LT		 1362 }
1363 err = nfs4_handle_exception(server, err, &exception);
1364 } while (exception.retry);
965b5d67 1365out:
1da177e4
LT		 1366 return err;
1367}
1368
cdd4e68b
TM		 1369static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1370{
1371 struct nfs4_opendata *data = calldata;
1372
1373 data->rpc_status = task->tk_status;
26e976a8 1374 if (data->rpc_status == 0) {
f597c537 1375 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1376 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1377 renew_lease(data->o_res.server, data->timestamp);
3e309914 1378 data->rpc_done = 1;
26e976a8 1379 }
cdd4e68b
TM		 1380}
1381
1382static void nfs4_open_confirm_release(void *calldata)
1383{
1384 struct nfs4_opendata *data = calldata;
1385 struct nfs4_state *state = NULL;
1386
1387 /* If this request hasn't been cancelled, do nothing */
1388 if (data->cancelled == 0)
1389 goto out_free;
1390 /* In case of error, no cleanup! */
3e309914 1391 if (!data->rpc_done)
cdd4e68b 1392 goto out_free;
cdd4e68b 1393 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1394 if (!IS_ERR(state))
643168c2 1395 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1396out_free:
c6d00e63 1397 nfs4_opendata_put(data);
cdd4e68b
TM		 1398}
1399
1400static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1401 .rpc_call_done = nfs4_open_confirm_done,
1402 .rpc_release = nfs4_open_confirm_release,
1403};
1404
1405/*
1406 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1407 */
1408static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1409{
1410 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1411 struct rpc_task *task;
5138fde0
TM		 1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1414 .rpc_argp = &data->c_arg,
1415 .rpc_resp = &data->c_res,
1416 .rpc_cred = data->owner->so_cred,
1417 };
c970aa85
TM		 1418 struct rpc_task_setup task_setup_data = {
1419 .rpc_client = server->client,
5138fde0 1420 .rpc_message = &msg,
c970aa85
TM		 1421 .callback_ops = &nfs4_open_confirm_ops,
1422 .callback_data = data,
101070ca 1423 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1424 .flags = RPC_TASK_ASYNC,
1425 };
1da177e4
LT		 1426 int status;
1427
c6d00e63 1428 kref_get(&data->kref);
3e309914
TM		 1429 data->rpc_done = 0;
1430 data->rpc_status = 0;
5138fde0 1431 data->timestamp = jiffies;
c970aa85 1432 task = rpc_run_task(&task_setup_data);
7a1218a2 1433 if (IS_ERR(task))
cdd4e68b 1434 return PTR_ERR(task);
cdd4e68b
TM		 1435 status = nfs4_wait_for_completion_rpc_task(task);
1436 if (status != 0) {
1437 data->cancelled = 1;
1438 smp_wmb();
1439 } else
1440 status = data->rpc_status;
e6b3c4db 1441 rpc_put_task(task);
1da177e4
LT		 1442 return status;
1443}
1444
24ac23ab 1445static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1446{
24ac23ab
TM		 1447 struct nfs4_opendata *data = calldata;
1448 struct nfs4_state_owner *sp = data->owner;
5138fde0 1449
24ac23ab
TM		 1450 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1451 return;
aac00a8d
TM		 1452 /*
1453 * Check if we still need to send an OPEN call, or if we can use
1454 * a delegation instead.
1455 */
1456 if (data->state != NULL) {
1457 struct nfs_delegation *delegation;
1458
dc0b027d 1459 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1460 goto out_no_action;
aac00a8d
TM		 1461 rcu_read_lock();
1462 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1463 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1464 can_open_delegated(delegation, data->o_arg.fmode))
1465 goto unlock_no_action;
aac00a8d
TM		 1466 rcu_read_unlock();
1467 }
95b72eb0 1468 /* Update client id. */
1f0e890d 1469 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1470 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1471 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1472 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1473 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1474 }
26e976a8 1475 data->timestamp = jiffies;
035168ab 1476 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1477 &data->o_arg.seq_args,
2240a9e2
TM		 1478 &data->o_res.seq_res,
1479 task) != 0)
1480 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1481 return;
652f89f6
TM		 1482unlock_no_action:
1483 rcu_read_unlock();
6ee41268
TM		 1484out_no_action:
1485 task->tk_action = NULL;
b75ad4cd 1486 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1487}
1488
24ac23ab
TM		 1489static void nfs4_open_done(struct rpc_task *task, void *calldata)
1490{
1491 struct nfs4_opendata *data = calldata;
1da177e4 1492
24ac23ab 1493 data->rpc_status = task->tk_status;
d898528c 1494
14516c3a
TM		 1495 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1496 return;
d898528c 1497
24ac23ab 1498 if (task->tk_status == 0) {
807d66d8
TM		 1499 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1500 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1501 case S_IFREG:
1502 break;
1503 case S_IFLNK:
24ac23ab 1504 data->rpc_status = -ELOOP;
6f926b5b
TM		 1505 break;
1506 case S_IFDIR:
24ac23ab 1507 data->rpc_status = -EISDIR;
6f926b5b
TM		 1508 break;
1509 default:
24ac23ab 1510 data->rpc_status = -ENOTDIR;
807d66d8 1511 }
6f926b5b 1512 }
26e976a8 1513 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1514 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1515 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1516 }
3e309914 1517 data->rpc_done = 1;
24ac23ab 1518}
6f926b5b 1519
24ac23ab
TM		 1520static void nfs4_open_release(void *calldata)
1521{
1522 struct nfs4_opendata *data = calldata;
1523 struct nfs4_state *state = NULL;
1524
1525 /* If this request hasn't been cancelled, do nothing */
1526 if (data->cancelled == 0)
1527 goto out_free;
1528 /* In case of error, no cleanup! */
3e309914 1529 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1530 goto out_free;
1531 /* In case we need an open_confirm, no cleanup! */
1532 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1533 goto out_free;
24ac23ab 1534 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1535 if (!IS_ERR(state))
643168c2 1536 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1537out_free:
c6d00e63 1538 nfs4_opendata_put(data);
24ac23ab
TM		 1539}
1540
1541static const struct rpc_call_ops nfs4_open_ops = {
1542 .rpc_call_prepare = nfs4_open_prepare,
1543 .rpc_call_done = nfs4_open_done,
1544 .rpc_release = nfs4_open_release,
1545};
1546
b257957e 1547static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1548{
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1553 struct rpc_task *task;
5138fde0
TM		 1554 struct rpc_message msg = {
1555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1556 .rpc_argp = o_arg,
1557 .rpc_resp = o_res,
1558 .rpc_cred = data->owner->so_cred,
1559 };
c970aa85
TM		 1560 struct rpc_task_setup task_setup_data = {
1561 .rpc_client = server->client,
5138fde0 1562 .rpc_message = &msg,
c970aa85
TM		 1563 .callback_ops = &nfs4_open_ops,
1564 .callback_data = data,
101070ca 1565 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1566 .flags = RPC_TASK_ASYNC,
1567 };
24ac23ab
TM		 1568 int status;
1569
9d12b216 1570 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1571 kref_get(&data->kref);
3e309914
TM		 1572 data->rpc_done = 0;
1573 data->rpc_status = 0;
2ced46c2 1574 data->cancelled = 0;
b257957e 1575 if (isrecover)
8fe72bac 1576 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1577 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1578 if (IS_ERR(task))
1579 return PTR_ERR(task);
1580 status = nfs4_wait_for_completion_rpc_task(task);
1581 if (status != 0) {
1582 data->cancelled = 1;
1583 smp_wmb();
1584 } else
1585 status = data->rpc_status;
1586 rpc_put_task(task);
1587
1588 return status;
1589}
1590
1591static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1592{
1593 struct inode *dir = data->dir->d_inode;
1594 struct nfs_openres *o_res = &data->o_res;
1595 int status;
1596
1597 status = nfs4_run_open_task(data, 1);
1598 if (status != 0 || !data->rpc_done)
1599 return status;
1600
6926afd1
TM		 1601 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1602
b257957e
AB		 1603 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1604 status = _nfs4_proc_open_confirm(data);
1605 if (status != 0)
1606 return status;
1607 }
1608
1609 return status;
1610}
1611
6168f62c
WAA		 1612static int nfs4_opendata_access(struct rpc_cred *cred,
1613 struct nfs4_opendata *opendata,
1614 struct nfs4_state *state, fmode_t fmode)
1615{
1616 struct nfs_access_entry cache;
1617 u32 mask;
1618
1619 /* access call failed or for some reason the server doesn't
1620 * support any access modes -- defer access call until later */
1621 if (opendata->o_res.access_supported == 0)
1622 return 0;
1623
1624 mask = 0;
bbd3a8ee
WAA		 1625 /* don't check MAY_WRITE - a newly created file may not have
1626 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1627 if (fmode & FMODE_READ)
1628 mask |= MAY_READ;
6168f62c
WAA		 1629 if (fmode & FMODE_EXEC)
1630 mask |= MAY_EXEC;
1631
1632 cache.cred = cred;
1633 cache.jiffies = jiffies;
1634 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1635 nfs_access_add_cache(state->inode, &cache);
1636
bbd3a8ee 1637 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1638 return 0;
1639
1640 /* even though OPEN succeeded, access is denied. Close the file */
1641 nfs4_close_state(state, fmode);
998f40b5 1642 return -EACCES;
6168f62c
WAA		 1643}
1644
b257957e
AB		 1645/*
1646 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1647 */
1648static int _nfs4_proc_open(struct nfs4_opendata *data)
1649{
1650 struct inode *dir = data->dir->d_inode;
1651 struct nfs_server *server = NFS_SERVER(dir);
1652 struct nfs_openargs *o_arg = &data->o_arg;
1653 struct nfs_openres *o_res = &data->o_res;
1654 int status;
1655
1656 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1657 if (!data->rpc_done)
1658 return status;
1659 if (status != 0) {
1660 if (status == -NFS4ERR_BADNAME &&
1661 !(o_arg->open_flags & O_CREAT))
1662 return -ENOENT;
24ac23ab 1663 return status;
08ef7bd3 1664 }
24ac23ab 1665
6926afd1
TM		 1666 nfs_fattr_map_and_free_names(server, &data->f_attr);
1667
90ff0c54 1668 if (o_arg->open_flags & O_CREAT)
56ae19f3 1669 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1670 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1671 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1672 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1673 status = _nfs4_proc_open_confirm(data);
1da177e4 1674 if (status != 0)
24ac23ab 1675 return status;
1da177e4
LT		 1676 }
1677 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1678 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1679 return 0;
1da177e4
LT		 1680}
1681
d83217c1
AA		 1682static int nfs4_recover_expired_lease(struct nfs_server *server)
1683{
1684 return nfs4_client_recover_expired_lease(server->nfs_client);
1685}
1686
1da177e4
LT		 1687/*
1688 * OPEN_EXPIRED:
1689 * reclaim state on the server after a network partition.
1690 * Assumes caller holds the appropriate lock
1691 */
539cd03a 1692static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1693{
e56e0b78 1694 struct nfs4_opendata *opendata;
864472e9 1695 int ret;
1da177e4 1696
6f220ed5
TM		 1697 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1698 if (IS_ERR(opendata))
1699 return PTR_ERR(opendata);
864472e9 1700 ret = nfs4_open_recover(opendata, state);
35d05778 1701 if (ret == -ESTALE)
3d4ff43d 1702 d_drop(ctx->dentry);
c6d00e63 1703 nfs4_opendata_put(opendata);
864472e9 1704 return ret;
1da177e4
LT		 1705}
1706
a9ed2e25 1707static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1708{
539cd03a 1709 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1710 struct nfs4_exception exception = { };
1711 int err;
1712
1713 do {
539cd03a 1714 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1715 switch (err) {
1716 default:
1717 goto out;
1718 case -NFS4ERR_GRACE:
1719 case -NFS4ERR_DELAY:
1720 nfs4_handle_exception(server, err, &exception);
1721 err = 0;
1722 }
202b50dc 1723 } while (exception.retry);
a9ed2e25 1724out:
202b50dc
TM		 1725 return err;
1726}
1727
1da177e4
LT		 1728static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1729{
1da177e4 1730 struct nfs_open_context *ctx;
864472e9 1731 int ret;
1da177e4 1732
864472e9
TM		 1733 ctx = nfs4_state_find_open_context(state);
1734 if (IS_ERR(ctx))
1735 return PTR_ERR(ctx);
539cd03a 1736 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1737 put_nfs_open_context(ctx);
1738 return ret;
1da177e4
LT		 1739}
1740
f062eb6c 1741#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1742static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1743{
f062eb6c 1744 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1745 nfs4_stateid *stateid = &state->stateid;
1746 int status;
1747
1748 /* If a state reset has been done, test_stateid is unneeded */
1749 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1750 return;
1751
1752 status = nfs41_test_stateid(server, stateid);
1753 if (status != NFS_OK) {
1754 /* Free the stateid unless the server explicitly
1755 * informs us the stateid is unrecognized. */
1756 if (status != -NFS4ERR_BAD_STATEID)
1757 nfs41_free_stateid(server, stateid);
6938867e 1758 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1759
6938867e
BS		 1760 write_seqlock(&state->seqlock);
1761 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1762 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1763 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1764 }
1765}
1766
1767/**
1768 * nfs41_check_open_stateid - possibly free an open stateid
1769 *
1770 * @state: NFSv4 state for an inode
1771 *
1772 * Returns NFS_OK if recovery for this stateid is now finished.
1773 * Otherwise a negative NFS4ERR value is returned.
1774 */
1775static int nfs41_check_open_stateid(struct nfs4_state *state)
1776{
1777 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1778 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1779 int status;
1780
1781 /* If a state reset has been done, test_stateid is unneeded */
1782 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1783 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1784 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1785 return -NFS4ERR_BAD_STATEID;
1786
1787 status = nfs41_test_stateid(server, stateid);
1788 if (status != NFS_OK) {
1789 /* Free the stateid unless the server explicitly
1790 * informs us the stateid is unrecognized. */
1791 if (status != -NFS4ERR_BAD_STATEID)
1792 nfs41_free_stateid(server, stateid);
1793
1794 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1795 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1796 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1797 }
1798 return status;
1799}
1800
1801static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1802{
eb64cf96 1803 int status;
b01dd1d8 1804
3e60ffdd
CL		 1805 nfs41_clear_delegation_stateid(state);
1806 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1807 if (status != NFS_OK)
1808 status = nfs4_open_expired(sp, state);
1809 return status;
f062eb6c
BS		 1810}
1811#endif
1812
aa53ed54
JL		 1813/*
1814 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1815 * fields corresponding to attributes that were used to store the verifier.
1816 * Make sure we clobber those fields in the later setattr call
1817 */
1818static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1819{
1820 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1821 !(sattr->ia_valid & ATTR_ATIME_SET))
1822 sattr->ia_valid |= ATTR_ATIME;
1823
1824 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1825 !(sattr->ia_valid & ATTR_MTIME_SET))
1826 sattr->ia_valid |= ATTR_MTIME;
1827}
1828
1da177e4 1829/*
24ac23ab 1830 * Returns a referenced nfs4_state
1da177e4 1831 */
82be417a
AA		 1832static int _nfs4_do_open(struct inode *dir,
1833 struct dentry *dentry,
1834 fmode_t fmode,
1835 int flags,
1836 struct iattr *sattr,
1837 struct rpc_cred *cred,
1838 struct nfs4_state **res,
1839 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1840{
1841 struct nfs4_state_owner *sp;
1842 struct nfs4_state *state = NULL;
1843 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1844 struct nfs4_opendata *opendata;
aac00a8d 1845 int status;
1da177e4
LT		 1846
1847 /* Protect against reboot recovery conflicts */
1da177e4 1848 status = -ENOMEM;
d1e284d5
TM		 1849 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1850 if (sp == NULL) {
1da177e4
LT		 1851 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1852 goto out_err;
1853 }
58d9714a
TM		 1854 status = nfs4_recover_expired_lease(server);
1855 if (status != 0)
b4454fe1 1856 goto err_put_state_owner;
82a2c1b7
AV		 1857 if (dentry->d_inode != NULL)
1858 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1859 status = -ENOMEM;
82a2c1b7 1860 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1861 if (opendata == NULL)
95d35cb4 1862 goto err_put_state_owner;
1da177e4 1863
82be417a
AA		 1864 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1865 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1866 if (!opendata->f_attr.mdsthreshold)
1867 goto err_opendata_put;
1549210f 1868 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1869 }
82a2c1b7
AV		 1870 if (dentry->d_inode != NULL)
1871 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1872
24ac23ab 1873 status = _nfs4_proc_open(opendata);
1da177e4 1874 if (status != 0)
c6d00e63 1875 goto err_opendata_put;
1da177e4 1876
24ac23ab 1877 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1878 status = PTR_ERR(state);
1879 if (IS_ERR(state))
c6d00e63 1880 goto err_opendata_put;
0df5dd4a 1881 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1882 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1883
6168f62c
WAA		 1884 status = nfs4_opendata_access(cred, opendata, state, fmode);
1885 if (status != 0)
1886 goto err_opendata_put;
1887
0ab64e0e
TM		 1888 if (opendata->o_arg.open_flags & O_EXCL) {
1889 nfs4_exclusive_attrset(opendata, sattr);
1890
1891 nfs_fattr_init(opendata->o_res.f_attr);
1892 status = nfs4_do_setattr(state->inode, cred,
1893 opendata->o_res.f_attr, sattr,
1894 state);
1895 if (status == 0)
1896 nfs_setattr_update_inode(state->inode, sattr);
1897 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1898 }
82be417a
AA		 1899
1900 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1901 *ctx_th = opendata->f_attr.mdsthreshold;
1902 else
1903 kfree(opendata->f_attr.mdsthreshold);
1904 opendata->f_attr.mdsthreshold = NULL;
1905
c6d00e63 1906 nfs4_opendata_put(opendata);
1da177e4 1907 nfs4_put_state_owner(sp);
1da177e4
LT		 1908 *res = state;
1909 return 0;
c6d00e63 1910err_opendata_put:
82be417a 1911 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1912 nfs4_opendata_put(opendata);
e56e0b78
TM		 1913err_put_state_owner:
1914 nfs4_put_state_owner(sp);
1da177e4 1915out_err:
1da177e4
LT		 1916 *res = NULL;
1917 return status;
1918}
1919
1920
82be417a
AA		 1921static struct nfs4_state *nfs4_do_open(struct inode *dir,
1922 struct dentry *dentry,
1923 fmode_t fmode,
1924 int flags,
1925 struct iattr *sattr,
1926 struct rpc_cred *cred,
1927 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1928{
1929 struct nfs4_exception exception = { };
1930 struct nfs4_state *res;
1931 int status;
1932
6168f62c 1933 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1934 do {
82be417a
AA		 1935 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1936 &res, ctx_th);
1da177e4
LT		 1937 if (status == 0)
1938 break;
1939 /* NOTE: BAD_SEQID means the server and client disagree about the
1940 * book-keeping w.r.t. state-changing operations
1941 * (OPEN/CLOSE/LOCK/LOCKU...)
1942 * It is actually a sign of a bug on the client or on the server.
1943 *
1944 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1945 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1946 * have unhashed the old state_owner for us, and that we can
1947 * therefore safely retry using a new one. We should still warn
1948 * the user though...
1949 */
1950 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1951 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1952 " returned a bad sequence-id error!\n",
1953 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1954 exception.retry = 1;
1955 continue;
1956 }
550f5747
TM		 1957 /*
1958 * BAD_STATEID on OPEN means that the server cancelled our
1959 * state before it received the OPEN_CONFIRM.
1960 * Recover by retrying the request as per the discussion
1961 * on Page 181 of RFC3530.
1962 */
1963 if (status == -NFS4ERR_BAD_STATEID) {
1964 exception.retry = 1;
1965 continue;
1966 }
aac00a8d
TM		 1967 if (status == -EAGAIN) {
1968 /* We must have found a delegation */
1969 exception.retry = 1;
1970 continue;
1971 }
1da177e4
LT		 1972 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1973 status, &exception));
1974 } while (exception.retry);
1975 return res;
1976}
1977
659bfcd6
TM		 1978static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1979 struct nfs_fattr *fattr, struct iattr *sattr,
1980 struct nfs4_state *state)
1da177e4 1981{
3e4f6290 1982 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1983 struct nfs_setattrargs arg = {
3e4f6290 1984 .fh = NFS_FH(inode),
1da177e4
LT		 1985 .iap = sattr,
1986 .server = server,
1987 .bitmask = server->attr_bitmask,
1988 };
1989 struct nfs_setattrres res = {
1990 .fattr = fattr,
1991 .server = server,
1992 };
1993 struct rpc_message msg = {
659bfcd6
TM		 1994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1995 .rpc_argp = &arg,
1996 .rpc_resp = &res,
1997 .rpc_cred = cred,
1da177e4 1998 };
26e976a8 1999 unsigned long timestamp = jiffies;
65e4308d 2000 int status;
1da177e4 2001
0e574af1 2002 nfs_fattr_init(fattr);
1da177e4 2003
4fc8796d 2004 if (state != NULL) {
2a369153
TM		 2005 struct nfs_lockowner lockowner = {
2006 .l_owner = current->files,
2007 .l_pid = current->tgid,
2008 };
4fc8796d 2009 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2010 &lockowner);
4fc8796d
TM		 2011 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2012 FMODE_WRITE)) {
3e4f6290 2013 /* Use that stateid */
08e9eac4 2014 } else
f597c537 2015 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2016
7c513058 2017 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2018 if (status == 0 && state != NULL)
2019 renew_lease(server, timestamp);
65e4308d 2020 return status;
1da177e4
LT		 2021}
2022
659bfcd6
TM		 2023static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2024 struct nfs_fattr *fattr, struct iattr *sattr,
2025 struct nfs4_state *state)
1da177e4 2026{
3e4f6290 2027 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2028 struct nfs4_exception exception = {
2029 .state = state,
3114ea7a 2030 .inode = inode,
a1d0b5ee 2031 };
1da177e4
LT		 2032 int err;
2033 do {
451146be
TM		 2034 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2035 switch (err) {
2036 case -NFS4ERR_OPENMODE:
2037 if (state && !(state->state & FMODE_WRITE)) {
2038 err = -EBADF;
2039 if (sattr->ia_valid & ATTR_OPEN)
2040 err = -EACCES;
2041 goto out;
2042 }
2043 }
2044 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2045 } while (exception.retry);
451146be 2046out:
1da177e4
LT		 2047 return err;
2048}
2049
2050struct nfs4_closedata {
2051 struct inode *inode;
2052 struct nfs4_state *state;
2053 struct nfs_closeargs arg;
2054 struct nfs_closeres res;
516a6af6 2055 struct nfs_fattr fattr;
26e976a8 2056 unsigned long timestamp;
f7e8917a
FI		 2057 bool roc;
2058 u32 roc_barrier;
1da177e4
LT		 2059};
2060
963d8fe5 2061static void nfs4_free_closedata(void *data)
9512135d 2062{
963d8fe5
TM		 2063 struct nfs4_closedata *calldata = data;
2064 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2065 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2066
f7e8917a
FI		 2067 if (calldata->roc)
2068 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2069 nfs4_put_open_state(calldata->state);
2070 nfs_free_seqid(calldata->arg.seqid);
9512135d 2071 nfs4_put_state_owner(sp);
324d003b 2072 nfs_sb_deactive_async(sb);
9512135d
TM		 2073 kfree(calldata);
2074}
2075
88069f77
TM		 2076static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2077 fmode_t fmode)
2078{
2079 spin_lock(&state->owner->so_lock);
2080 if (!(fmode & FMODE_READ))
2081 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2082 if (!(fmode & FMODE_WRITE))
2083 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2084 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2085 spin_unlock(&state->owner->so_lock);
2086}
2087
963d8fe5 2088static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2089{
963d8fe5 2090 struct nfs4_closedata *calldata = data;
1da177e4 2091 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2092 struct nfs_server *server = NFS_SERVER(calldata->inode);
2093
a3ca5651 2094 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2095 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2096 return;
1da177e4
LT		 2097 /* hmm. we are done with the inode, and in the process of freeing
2098 * the state_owner. we keep this around to process errors
2099 */
1da177e4
LT		 2100 switch (task->tk_status) {
2101 case 0:
f7e8917a
FI		 2102 if (calldata->roc)
2103 pnfs_roc_set_barrier(state->inode,
2104 calldata->roc_barrier);
45328c35 2105 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2106 renew_lease(server, calldata->timestamp);
88069f77
TM		 2107 nfs4_close_clear_stateid_flags(state,
2108 calldata->arg.fmode);
1da177e4
LT		 2109 break;
2110 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2111 case -NFS4ERR_OLD_STATEID:
2112 case -NFS4ERR_BAD_STATEID:
1da177e4 2113 case -NFS4ERR_EXPIRED:
dc0b027d 2114 if (calldata->arg.fmode == 0)
9e33bed5 2115 break;
1da177e4 2116 default:
72211dbe
TM		 2117 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2118 rpc_restart_call_prepare(task);
1da177e4 2119 }
72211dbe 2120 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2121 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2122 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2123}
2124
4ce70ada 2125static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2126{
4ce70ada 2127 struct nfs4_closedata *calldata = data;
9512135d 2128 struct nfs4_state *state = calldata->state;
7fdab069 2129 struct inode *inode = calldata->inode;
88069f77 2130 int call_close = 0;
9512135d 2131
a3ca5651 2132 dprintk("%s: begin!\n", __func__);
963d8fe5 2133 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2134 return;
003707c7 2135
88069f77
TM		 2136 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2137 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2138 spin_lock(&state->owner->so_lock);
003707c7 2139 /* Calculate the change in open mode */
e7616923 2140 if (state->n_rdwr == 0) {
003707c7 2141 if (state->n_rdonly == 0) {
88069f77
TM		 2142 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2143 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2144 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2145 }
2146 if (state->n_wronly == 0) {
88069f77
TM		 2147 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2148 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2149 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2150 }
e7616923 2151 }
4cecb76f 2152 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2153
2154 if (!call_close) {
963d8fe5
TM		 2155 /* Note: exit _without_ calling nfs4_close_done */
2156 task->tk_action = NULL;
b75ad4cd 2157 nfs4_sequence_done(task, &calldata->res.seq_res);
a3ca5651 2158 goto out;
9512135d 2159 }
88069f77 2160
f7e8917a 2161 if (calldata->arg.fmode == 0) {
88069f77 2162 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2163 if (calldata->roc &&
7fdab069 2164 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2165 goto out;
f7e8917a 2166 }
88069f77 2167
516a6af6 2168 nfs_fattr_init(calldata->res.fattr);
26e976a8 2169 calldata->timestamp = jiffies;
7fdab069 2170 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2171 &calldata->arg.seq_args,
2172 &calldata->res.seq_res,
2240a9e2
TM		 2173 task) != 0)
2174 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2175out:
2176 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2177}
2178
963d8fe5 2179static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2180 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2181 .rpc_call_done = nfs4_close_done,
2182 .rpc_release = nfs4_free_closedata,
2183};
2184
1da177e4
LT		 2185/*
2186 * It is possible for data to be read/written from a mem-mapped file
2187 * after the sys_close call (which hits the vfs layer as a flush).
2188 * This means that we can't safely call nfsv4 close on a file until
2189 * the inode is cleared. This in turn means that we are not good
2190 * NFSv4 citizens - we do not indicate to the server to update the file's
2191 * share state even when we are done with one of the three share
2192 * stateid's in the inode.
2193 *
2194 * NOTE: Caller must be holding the sp->so_owner semaphore!
2195 */
1f7977c1 2196int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2197{
4a35bd41 2198 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2199 struct nfs4_closedata *calldata;
b39e625b
TM		 2200 struct nfs4_state_owner *sp = state->owner;
2201 struct rpc_task *task;
5138fde0
TM		 2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2204 .rpc_cred = state->owner->so_cred,
2205 };
c970aa85
TM		 2206 struct rpc_task_setup task_setup_data = {
2207 .rpc_client = server->client,
5138fde0 2208 .rpc_message = &msg,
c970aa85 2209 .callback_ops = &nfs4_close_ops,
101070ca 2210 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2211 .flags = RPC_TASK_ASYNC,
2212 };
9512135d 2213 int status = -ENOMEM;
1da177e4 2214
8535b2be 2215 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2216 if (calldata == NULL)
9512135d 2217 goto out;
9d12b216 2218 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2219 calldata->inode = state->inode;
1da177e4 2220 calldata->state = state;
4a35bd41 2221 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2222 calldata->arg.stateid = &state->open_stateid;
1da177e4 2223 /* Serialization for the sequence id */
8535b2be 2224 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2225 if (calldata->arg.seqid == NULL)
2226 goto out_free_calldata;
dc0b027d 2227 calldata->arg.fmode = 0;
a65318bf 2228 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2229 calldata->res.fattr = &calldata->fattr;
c1d51931 2230 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2231 calldata->res.server = server;
1f7977c1 2232 calldata->roc = pnfs_roc(state->inode);
643168c2 2233 nfs_sb_active(calldata->inode->i_sb);
9512135d 2234
1174dd1f
TM		 2235 msg.rpc_argp = &calldata->arg;
2236 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2237 task_setup_data.callback_data = calldata;
2238 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2239 if (IS_ERR(task))
2240 return PTR_ERR(task);
a49c3c77
TM		 2241 status = 0;
2242 if (wait)
2243 status = rpc_wait_for_completion_task(task);
b39e625b 2244 rpc_put_task(task);
a49c3c77 2245 return status;
9512135d
TM		 2246out_free_calldata:
2247 kfree(calldata);
2248out:
b39e625b
TM		 2249 nfs4_put_open_state(state);
2250 nfs4_put_state_owner(sp);
9512135d 2251 return status;
1da177e4
LT		 2252}
2253
2b484297 2254static struct inode *
cd9a1c0e 2255nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2256{
1da177e4 2257 struct nfs4_state *state;
1da177e4 2258
565277f6 2259 /* Protect against concurrent sillydeletes */
82be417a
AA		 2260 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2261 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2262 if (IS_ERR(state))
2263 return ERR_CAST(state);
cd9a1c0e 2264 ctx->state = state;
f46e0bd3 2265 return igrab(state->inode);
1da177e4
LT		 2266}
2267
1185a552 2268static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2269{
2270 if (ctx->state == NULL)
2271 return;
2272 if (is_sync)
643168c2 2273 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2274 else
643168c2 2275 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2276}
1da177e4
LT		 2277
2278static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2279{
43652ad5
BH		 2280 struct nfs4_server_caps_arg args = {
2281 .fhandle = fhandle,
2282 };
1da177e4
LT		 2283 struct nfs4_server_caps_res res = {};
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2286 .rpc_argp = &args,
1da177e4
LT		 2287 .rpc_resp = &res,
2288 };
2289 int status;
2290
7c513058 2291 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2292 if (status == 0) {
2293 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2294 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2295 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2296 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2297 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2298 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2299 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2300 server->caps |= NFS_CAP_ACLS;
2301 if (res.has_links != 0)
2302 server->caps |= NFS_CAP_HARDLINKS;
2303 if (res.has_symlinks != 0)
2304 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2305 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2306 server->caps |= NFS_CAP_FILEID;
2307 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2308 server->caps |= NFS_CAP_MODE;
2309 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2310 server->caps |= NFS_CAP_NLINK;
2311 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2312 server->caps |= NFS_CAP_OWNER;
2313 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2314 server->caps |= NFS_CAP_OWNER_GROUP;
2315 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2316 server->caps |= NFS_CAP_ATIME;
2317 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2318 server->caps |= NFS_CAP_CTIME;
2319 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2320 server->caps |= NFS_CAP_MTIME;
2321
a65318bf
TM		 2322 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2323 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2324 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2325 server->acl_bitmask = res.acl_bitmask;
264e6351 2326 server->fh_expire_type = res.fh_expire_type;
1da177e4 2327 }
cccef3b9 2328
1da177e4
LT		 2329 return status;
2330}
2331
55a97593 2332int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2333{
2334 struct nfs4_exception exception = { };
2335 int err;
2336 do {
2337 err = nfs4_handle_exception(server,
2338 _nfs4_server_capabilities(server, fhandle),
2339 &exception);
2340 } while (exception.retry);
2341 return err;
2342}
2343
2344static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2345 struct nfs_fsinfo *info)
2346{
1da177e4
LT		 2347 struct nfs4_lookup_root_arg args = {
2348 .bitmask = nfs4_fattr_bitmap,
2349 };
2350 struct nfs4_lookup_res res = {
2351 .server = server,
0e574af1 2352 .fattr = info->fattr,
1da177e4
LT		 2353 .fh = fhandle,
2354 };
2355 struct rpc_message msg = {
2356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2357 .rpc_argp = &args,
2358 .rpc_resp = &res,
2359 };
008f55d0 2360
0e574af1 2361 nfs_fattr_init(info->fattr);
7c513058 2362 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2363}
2364
2365static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2366 struct nfs_fsinfo *info)
2367{
2368 struct nfs4_exception exception = { };
2369 int err;
2370 do {
fb8a5ba8
BS		 2371 err = _nfs4_lookup_root(server, fhandle, info);
2372 switch (err) {
2373 case 0:
2374 case -NFS4ERR_WRONGSEC:
05e9cfb4 2375 goto out;
fb8a5ba8
BS		 2376 default:
2377 err = nfs4_handle_exception(server, err, &exception);
2378 }
1da177e4 2379 } while (exception.retry);
05e9cfb4 2380out:
1da177e4
LT		 2381 return err;
2382}
2383
8f70e95f
BS		 2384static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2385 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2386{
2387 struct rpc_auth *auth;
2388 int ret;
2389
2390 auth = rpcauth_create(flavor, server->client);
e8d920c5 2391 if (IS_ERR(auth)) {
8f70e95f
BS		 2392 ret = -EIO;
2393 goto out;
2394 }
2395 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2396out:
2397 return ret;
2398}
2399
801a16dc 2400static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2401 struct nfs_fsinfo *info)
1da177e4 2402{
8f70e95f 2403 int i, len, status = 0;
0fabee24 2404 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2405
6a1a1e34 2406 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2407 if (len < 0)
2408 return len;
8f70e95f
BS		 2409
2410 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2411 /* AUTH_UNIX is the default flavor if none was specified,
2412 * thus has already been tried. */
2413 if (flav_array[i] == RPC_AUTH_UNIX)
2414 continue;
2415
8f70e95f 2416 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2417 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2418 continue;
2419 break;
8f70e95f 2420 }
fb8a5ba8
BS		 2421 /*
2422 * -EACCESS could mean that the user doesn't have correct permissions
2423 * to access the mount. It could also mean that we tried to mount
2424 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2425 * existing mount programs don't handle -EACCES very well so it should
2426 * be mapped to -EPERM instead.
2427 */
2428 if (status == -EACCES)
2429 status = -EPERM;
801a16dc
BS		 2430 return status;
2431}
2432
2433/*
2434 * get the file handle for the "/" directory on the server
2435 */
3028eb2b
BS		 2436int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2437 struct nfs_fsinfo *info)
801a16dc 2438{
fca78d6d 2439 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2440 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2441 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2442 /*
2443 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2444 * by nfs4_map_errors() as this function exits.
2445 */
fca78d6d 2446 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2447 if (status == 0)
2448 status = nfs4_server_capabilities(server, fhandle);
2449 if (status == 0)
2450 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2451 return nfs4_map_errors(status);
1da177e4
LT		 2452}
2453
bae36241
BS		 2454static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2455 struct nfs_fsinfo *info)
2456{
2457 int error;
2458 struct nfs_fattr *fattr = info->fattr;
2459
2460 error = nfs4_server_capabilities(server, mntfh);
2461 if (error < 0) {
2462 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2463 return error;
2464 }
2465
2466 error = nfs4_proc_getattr(server, mntfh, fattr);
2467 if (error < 0) {
2468 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2469 return error;
2470 }
2471
2472 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2473 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2474 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2475
2476 return error;
2477}
2478
6b97fd3d
MN		 2479/*
2480 * Get locations and (maybe) other attributes of a referral.
2481 * Note that we'll actually follow the referral later when
2482 * we detect fsid mismatch in inode revalidation
2483 */
f05d147f
BS		 2484static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2485 const struct qstr *name, struct nfs_fattr *fattr,
2486 struct nfs_fh *fhandle)
6b97fd3d
MN		 2487{
2488 int status = -ENOMEM;
2489 struct page *page = NULL;
2490 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2491
2492 page = alloc_page(GFP_KERNEL);
2493 if (page == NULL)
2494 goto out;
2495 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2496 if (locations == NULL)
2497 goto out;
2498
f05d147f 2499 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2500 if (status != 0)
2501 goto out;
2502 /* Make sure server returned a different fsid for the referral */
2503 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2504 dprintk("%s: server did not return a different fsid for"
2505 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2506 status = -EIO;
2507 goto out;
2508 }
533eb461
AA		 2509 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2510 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2511
533eb461 2512 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2513 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2514 memset(fhandle, 0, sizeof(struct nfs_fh));
2515out:
2516 if (page)
2517 __free_page(page);
5d7ca35a 2518 kfree(locations);
6b97fd3d
MN		 2519 return status;
2520}
2521
1da177e4
LT		 2522static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2523{
2524 struct nfs4_getattr_arg args = {
2525 .fh = fhandle,
2526 .bitmask = server->attr_bitmask,
2527 };
2528 struct nfs4_getattr_res res = {
2529 .fattr = fattr,
2530 .server = server,
2531 };
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2534 .rpc_argp = &args,
2535 .rpc_resp = &res,
2536 };
2537
0e574af1 2538 nfs_fattr_init(fattr);
7c513058 2539 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2540}
2541
2542static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2543{
2544 struct nfs4_exception exception = { };
2545 int err;
2546 do {
2547 err = nfs4_handle_exception(server,
2548 _nfs4_proc_getattr(server, fhandle, fattr),
2549 &exception);
2550 } while (exception.retry);
2551 return err;
2552}
2553
2554/*
2555 * The file is not closed if it is opened due to the a request to change
2556 * the size of the file. The open call will not be needed once the
2557 * VFS layer lookup-intents are implemented.
2558 *
2559 * Close is called when the inode is destroyed.
2560 * If we haven't opened the file for O_WRONLY, we
2561 * need to in the size_change case to obtain a stateid.
2562 *
2563 * Got race?
2564 * Because OPEN is always done by name in nfsv4, it is
2565 * possible that we opened a different file by the same
2566 * name. We can recognize this race condition, but we
2567 * can't do anything about it besides returning an error.
2568 *
2569 * This will be fixed with VFS changes (lookup-intent).
2570 */
2571static int
2572nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2573 struct iattr *sattr)
2574{
08e9eac4 2575 struct inode *inode = dentry->d_inode;
659bfcd6 2576 struct rpc_cred *cred = NULL;
d530838b 2577 struct nfs4_state *state = NULL;
1da177e4
LT		 2578 int status;
2579
8a1636c4
BH		 2580 if (pnfs_ld_layoutret_on_setattr(inode))
2581 pnfs_return_layout(inode);
2582
0e574af1 2583 nfs_fattr_init(fattr);
1da177e4 2584
2669940d
AA		 2585 /* Deal with open(O_TRUNC) */
2586 if (sattr->ia_valid & ATTR_OPEN)
2587 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2588
2589 /* Optimization: if the end result is no change, don't RPC */
2590 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2591 return 0;
2592
d530838b 2593 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2594 if (sattr->ia_valid & ATTR_FILE) {
2595 struct nfs_open_context *ctx;
2596
2597 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2598 if (ctx) {
2599 cred = ctx->cred;
2600 state = ctx->state;
2601 }
659bfcd6 2602 }
08e9eac4 2603
659bfcd6 2604 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2605 if (status == 0)
2606 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2607 return status;
2608}
2609
0c2e53f1
TM		 2610static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2611 const struct qstr *name, struct nfs_fh *fhandle,
2612 struct nfs_fattr *fattr)
2b3de441 2613{
0c2e53f1 2614 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2615 int status;
2616 struct nfs4_lookup_arg args = {
2617 .bitmask = server->attr_bitmask,
0c2e53f1 2618 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2619 .name = name,
2620 };
2621 struct nfs4_lookup_res res = {
2622 .server = server,
2623 .fattr = fattr,
2624 .fh = fhandle,
2625 };
2626 struct rpc_message msg = {
2627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2628 .rpc_argp = &args,
2629 .rpc_resp = &res,
2630 };
2631
2632 nfs_fattr_init(fattr);
2633
1da177e4 2634 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2635 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2636 dprintk("NFS reply lookup: %d\n", status);
2637 return status;
2638}
2639
72de53ec 2640static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2641{
7ebb9315 2642 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2643 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2644 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2645 fattr->nlink = 2;
2646}
2647
72de53ec
BS		 2648static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2649 struct qstr *name, struct nfs_fh *fhandle,
2650 struct nfs_fattr *fattr)
1da177e4
LT		 2651{
2652 struct nfs4_exception exception = { };
72de53ec 2653 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2654 int err;
2655 do {
72de53ec
BS		 2656 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2657 switch (err) {
08ef7bd3 2658 case -NFS4ERR_BADNAME:
72de53ec
BS		 2659 err = -ENOENT;
2660 goto out;
0c2e53f1 2661 case -NFS4ERR_MOVED:
f05d147f 2662 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2663 goto out;
0c2e53f1 2664 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2665 err = -EPERM;
2666 if (client != *clnt)
2667 goto out;
2668
2669 client = nfs4_create_sec_client(client, dir, name);
2670 if (IS_ERR(client))
2671 return PTR_ERR(client);
2672
2673 exception.retry = 1;
2674 break;
2675 default:
2676 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2677 }
1da177e4 2678 } while (exception.retry);
72de53ec
BS		 2679
2680out:
2681 if (err == 0)
2682 *clnt = client;
2683 else if (client != *clnt)
2684 rpc_shutdown_client(client);
2685
1da177e4
LT		 2686 return err;
2687}
2688
80a16b21 2689static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2690 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2691{
2692 int status;
2693 struct rpc_clnt *client = NFS_CLIENT(dir);
2694
2695 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2696 if (client != NFS_CLIENT(dir)) {
2697 rpc_shutdown_client(client);
2698 nfs_fixup_secinfo_attributes(fattr);
2699 }
2700 return status;
2701}
2702
f05d147f
BS		 2703struct rpc_clnt *
2704nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2706{
2707 int status;
2708 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2709
2710 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2711 if (status < 0) {
2712 rpc_shutdown_client(client);
2713 return ERR_PTR(status);
2714 }
2715 return client;
2716}
2717
1da177e4
LT		 2718static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2719{
76b32999 2720 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2721 struct nfs4_accessargs args = {
2722 .fh = NFS_FH(inode),
a4980e78 2723 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2724 };
2725 struct nfs4_accessres res = {
2726 .server = server,
1da177e4 2727 };
1da177e4
LT		 2728 struct rpc_message msg = {
2729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2730 .rpc_argp = &args,
2731 .rpc_resp = &res,
2732 .rpc_cred = entry->cred,
2733 };
2734 int mode = entry->mask;
2735 int status;
2736
2737 /*
2738 * Determine which access bits we want to ask for...
2739 */
2740 if (mode & MAY_READ)
2741 args.access |= NFS4_ACCESS_READ;
2742 if (S_ISDIR(inode->i_mode)) {
2743 if (mode & MAY_WRITE)
2744 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2745 if (mode & MAY_EXEC)
2746 args.access |= NFS4_ACCESS_LOOKUP;
2747 } else {
2748 if (mode & MAY_WRITE)
2749 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2750 if (mode & MAY_EXEC)
2751 args.access |= NFS4_ACCESS_EXECUTE;
2752 }
c407d41a
TM		 2753
2754 res.fattr = nfs_alloc_fattr();
2755 if (res.fattr == NULL)
2756 return -ENOMEM;
2757
7c513058 2758 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2759 if (!status) {
6168f62c 2760 nfs_access_set_mask(entry, res.access);
c407d41a 2761 nfs_refresh_inode(inode, res.fattr);
1da177e4 2762 }
c407d41a 2763 nfs_free_fattr(res.fattr);
1da177e4
LT		 2764 return status;
2765}
2766
2767static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2768{
2769 struct nfs4_exception exception = { };
2770 int err;
2771 do {
2772 err = nfs4_handle_exception(NFS_SERVER(inode),
2773 _nfs4_proc_access(inode, entry),
2774 &exception);
2775 } while (exception.retry);
2776 return err;
2777}
2778
2779/*
2780 * TODO: For the time being, we don't try to get any attributes
2781 * along with any of the zero-copy operations READ, READDIR,
2782 * READLINK, WRITE.
2783 *
2784 * In the case of the first three, we want to put the GETATTR
2785 * after the read-type operation -- this is because it is hard
2786 * to predict the length of a GETATTR response in v4, and thus
2787 * align the READ data correctly. This means that the GETATTR
2788 * may end up partially falling into the page cache, and we should
2789 * shift it into the 'tail' of the xdr_buf before processing.
2790 * To do this efficiently, we need to know the total length
2791 * of data received, which doesn't seem to be available outside
2792 * of the RPC layer.
2793 *
2794 * In the case of WRITE, we also want to put the GETATTR after
2795 * the operation -- in this case because we want to make sure
140150db 2796 * we get the post-operation mtime and size.
1da177e4
LT		 2797 *
2798 * Both of these changes to the XDR layer would in fact be quite
2799 * minor, but I decided to leave them for a subsequent patch.
2800 */
2801static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2802 unsigned int pgbase, unsigned int pglen)
2803{
2804 struct nfs4_readlink args = {
2805 .fh = NFS_FH(inode),
2806 .pgbase = pgbase,
2807 .pglen = pglen,
2808 .pages = &page,
2809 };
f50c7000 2810 struct nfs4_readlink_res res;
1da177e4
LT		 2811 struct rpc_message msg = {
2812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2813 .rpc_argp = &args,
f50c7000 2814 .rpc_resp = &res,
1da177e4
LT		 2815 };
2816
7c513058 2817 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2818}
2819
2820static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2821 unsigned int pgbase, unsigned int pglen)
2822{
2823 struct nfs4_exception exception = { };
2824 int err;
2825 do {
2826 err = nfs4_handle_exception(NFS_SERVER(inode),
2827 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2828 &exception);
2829 } while (exception.retry);
2830 return err;
2831}
2832
1da177e4 2833/*
8867fe58 2834 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2835 */
1da177e4
LT		 2836static int
2837nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2838 int flags)
1da177e4 2839{
8867fe58 2840 struct nfs_open_context *ctx;
1da177e4 2841 struct nfs4_state *state;
1da177e4
LT		 2842 int status = 0;
2843
8867fe58
MS		 2844 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2845 if (IS_ERR(ctx))
2846 return PTR_ERR(ctx);
2847
a8a5da99 2848 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2849 state = nfs4_do_open(dir, dentry, ctx->mode,
2850 flags, sattr, ctx->cred,
2851 &ctx->mdsthreshold);
d4d9cdcb 2852 d_drop(dentry);
1da177e4
LT		 2853 if (IS_ERR(state)) {
2854 status = PTR_ERR(state);
c0204fd2 2855 goto out;
1da177e4 2856 }
d4d9cdcb 2857 d_add(dentry, igrab(state->inode));
d75340cc 2858 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2859 ctx->state = state;
1da177e4 2860out:
8867fe58 2861 put_nfs_open_context(ctx);
1da177e4
LT		 2862 return status;
2863}
2864
2865static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2866{
16e42959 2867 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2868 struct nfs_removeargs args = {
1da177e4 2869 .fh = NFS_FH(dir),
26fe5750 2870 .name = *name,
16e42959 2871 };
4fdc17b2 2872 struct nfs_removeres res = {
16e42959 2873 .server = server,
1da177e4 2874 };
1da177e4 2875 struct rpc_message msg = {
4fdc17b2
TM		 2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2877 .rpc_argp = &args,
2878 .rpc_resp = &res,
1da177e4 2879 };
778d2817 2880 int status;
1da177e4 2881
7c513058 2882 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2883 if (status == 0)
16e42959 2884 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2885 return status;
2886}
2887
2888static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2889{
2890 struct nfs4_exception exception = { };
2891 int err;
2892 do {
2893 err = nfs4_handle_exception(NFS_SERVER(dir),
2894 _nfs4_proc_remove(dir, name),
2895 &exception);
2896 } while (exception.retry);
2897 return err;
2898}
2899
e4eff1a6 2900static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2901{
e4eff1a6
TM		 2902 struct nfs_server *server = NFS_SERVER(dir);
2903 struct nfs_removeargs *args = msg->rpc_argp;
2904 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2905
e4eff1a6 2906 res->server = server;
1da177e4 2907 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2908 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2909}
2910
34e137cc
BS		 2911static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2912{
d9afbd1b
TM		 2913 nfs4_setup_sequence(NFS_SERVER(data->dir),
2914 &data->args.seq_args,
2915 &data->res.seq_res,
2916 task);
1da177e4
LT		 2917}
2918
e4eff1a6 2919static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2920{
e4eff1a6
TM		 2921 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2922
14516c3a
TM		 2923 if (!nfs4_sequence_done(task, &res->seq_res))
2924 return 0;
9e33bed5 2925 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2926 return 0;
2927 update_changeattr(dir, &res->cinfo);
e4eff1a6 2928 return 1;
1da177e4
LT		 2929}
2930
d3d4152a
JL		 2931static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2932{
2933 struct nfs_server *server = NFS_SERVER(dir);
2934 struct nfs_renameargs *arg = msg->rpc_argp;
2935 struct nfs_renameres *res = msg->rpc_resp;
2936
2937 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2938 res->server = server;
9d12b216 2939 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2940}
2941
c6bfa1a1
BS		 2942static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2943{
d9afbd1b
TM		 2944 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2945 &data->args.seq_args,
2946 &data->res.seq_res,
2947 task);
d3d4152a
JL		 2948}
2949
2950static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2951 struct inode *new_dir)
2952{
2953 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2954
2955 if (!nfs4_sequence_done(task, &res->seq_res))
2956 return 0;
2957 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2958 return 0;
2959
2960 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2961 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2962 return 1;
2963}
2964
1da177e4
LT		 2965static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2966 struct inode *new_dir, struct qstr *new_name)
2967{
6caf2c82 2968 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2969 struct nfs_renameargs arg = {
1da177e4
LT		 2970 .old_dir = NFS_FH(old_dir),
2971 .new_dir = NFS_FH(new_dir),
2972 .old_name = old_name,
2973 .new_name = new_name,
6caf2c82 2974 };
e8582a8b 2975 struct nfs_renameres res = {
6caf2c82 2976 .server = server,
1da177e4 2977 };
1da177e4
LT		 2978 struct rpc_message msg = {
2979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2980 .rpc_argp = &arg,
2981 .rpc_resp = &res,
2982 };
011fff72 2983 int status = -ENOMEM;
1da177e4 2984
7c513058 2985 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2986 if (!status) {
2987 update_changeattr(old_dir, &res.old_cinfo);
2988 update_changeattr(new_dir, &res.new_cinfo);
2989 }
2990 return status;
2991}
2992
2993static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2994 struct inode *new_dir, struct qstr *new_name)
2995{
2996 struct nfs4_exception exception = { };
2997 int err;
2998 do {
2999 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3000 _nfs4_proc_rename(old_dir, old_name,
3001 new_dir, new_name),
3002 &exception);
3003 } while (exception.retry);
3004 return err;
3005}
3006
3007static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3008{
91ba2eee 3009 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3010 struct nfs4_link_arg arg = {
3011 .fh = NFS_FH(inode),
3012 .dir_fh = NFS_FH(dir),
3013 .name = name,
91ba2eee
TM		 3014 .bitmask = server->attr_bitmask,
3015 };
91ba2eee
TM		 3016 struct nfs4_link_res res = {
3017 .server = server,
1da177e4 3018 };
1da177e4
LT		 3019 struct rpc_message msg = {
3020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3021 .rpc_argp = &arg,
91ba2eee 3022 .rpc_resp = &res,
1da177e4 3023 };
136f2627
TM		 3024 int status = -ENOMEM;
3025
3026 res.fattr = nfs_alloc_fattr();
778d2817 3027 if (res.fattr == NULL)
136f2627 3028 goto out;
1da177e4 3029
7c513058 3030 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3031 if (!status) {
3032 update_changeattr(dir, &res.cinfo);
73a3d07c 3033 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3034 }
136f2627 3035out:
136f2627 3036 nfs_free_fattr(res.fattr);
1da177e4
LT		 3037 return status;
3038}
3039
3040static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3041{
3042 struct nfs4_exception exception = { };
3043 int err;
3044 do {
3045 err = nfs4_handle_exception(NFS_SERVER(inode),
3046 _nfs4_proc_link(inode, dir, name),
3047 &exception);
3048 } while (exception.retry);
3049 return err;
3050}
3051
57dc9a57
TM		 3052struct nfs4_createdata {
3053 struct rpc_message msg;
3054 struct nfs4_create_arg arg;
3055 struct nfs4_create_res res;
3056 struct nfs_fh fh;
3057 struct nfs_fattr fattr;
57dc9a57
TM		 3058};
3059
3060static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3061 struct qstr *name, struct iattr *sattr, u32 ftype)
3062{
3063 struct nfs4_createdata *data;
3064
3065 data = kzalloc(sizeof(*data), GFP_KERNEL);
3066 if (data != NULL) {
3067 struct nfs_server *server = NFS_SERVER(dir);
3068
3069 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3070 data->msg.rpc_argp = &data->arg;
3071 data->msg.rpc_resp = &data->res;
3072 data->arg.dir_fh = NFS_FH(dir);
3073 data->arg.server = server;
3074 data->arg.name = name;
3075 data->arg.attrs = sattr;
3076 data->arg.ftype = ftype;
3077 data->arg.bitmask = server->attr_bitmask;
3078 data->res.server = server;
3079 data->res.fh = &data->fh;
3080 data->res.fattr = &data->fattr;
57dc9a57 3081 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3082 }
3083 return data;
3084}
3085
3086static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3087{
7c513058 3088 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3089 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3090 if (status == 0) {
3091 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3092 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3093 }
3094 return status;
3095}
3096
3097static void nfs4_free_createdata(struct nfs4_createdata *data)
3098{
3099 kfree(data);
3100}
3101
4f390c15 3102static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3103 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3104{
57dc9a57
TM		 3105 struct nfs4_createdata *data;
3106 int status = -ENAMETOOLONG;
1da177e4 3107
94a6d753 3108 if (len > NFS4_MAXPATHLEN)
57dc9a57 3109 goto out;
4f390c15 3110
57dc9a57
TM		 3111 status = -ENOMEM;
3112 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3113 if (data == NULL)
3114 goto out;
3115
3116 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3117 data->arg.u.symlink.pages = &page;
3118 data->arg.u.symlink.len = len;
1da177e4 3119
57dc9a57
TM		 3120 status = nfs4_do_create(dir, dentry, data);
3121
3122 nfs4_free_createdata(data);
3123out:
1da177e4
LT		 3124 return status;
3125}
3126
4f390c15 3127static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3128 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3129{
3130 struct nfs4_exception exception = { };
3131 int err;
3132 do {
3133 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3134 _nfs4_proc_symlink(dir, dentry, page,
3135 len, sattr),
1da177e4
LT		 3136 &exception);
3137 } while (exception.retry);
3138 return err;
3139}
3140
3141static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3142 struct iattr *sattr)
3143{
57dc9a57
TM		 3144 struct nfs4_createdata *data;
3145 int status = -ENOMEM;
1da177e4 3146
57dc9a57
TM		 3147 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3148 if (data == NULL)
3149 goto out;
3150
3151 status = nfs4_do_create(dir, dentry, data);
3152
3153 nfs4_free_createdata(data);
3154out:
1da177e4
LT		 3155 return status;
3156}
3157
3158static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3159 struct iattr *sattr)
3160{
3161 struct nfs4_exception exception = { };
3162 int err;
a8a5da99
AK		 3163
3164 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3165 do {
3166 err = nfs4_handle_exception(NFS_SERVER(dir),
3167 _nfs4_proc_mkdir(dir, dentry, sattr),
3168 &exception);
3169 } while (exception.retry);
3170 return err;
3171}
3172
3173static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3174 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3175{
3176 struct inode *dir = dentry->d_inode;
3177 struct nfs4_readdir_arg args = {
3178 .fh = NFS_FH(dir),
56e4ebf8 3179 .pages = pages,
1da177e4
LT		 3180 .pgbase = 0,
3181 .count = count,
96d25e53 3182 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3183 .plus = plus,
1da177e4
LT		 3184 };
3185 struct nfs4_readdir_res res;
3186 struct rpc_message msg = {
3187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3188 .rpc_argp = &args,
3189 .rpc_resp = &res,
3190 .rpc_cred = cred,
3191 };
3192 int status;
3193
3110ff80 3194 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3195 dentry->d_parent->d_name.name,
3196 dentry->d_name.name,
3197 (unsigned long long)cookie);
c3f52af3 3198 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3199 res.pgbase = args.pgbase;
7c513058 3200 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3201 if (status >= 0) {
c3f52af3 3202 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3203 status += args.pgbase;
3204 }
c4812998
TM		 3205
3206 nfs_invalidate_atime(dir);
3207
3110ff80 3208 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3209 return status;
3210}
3211
3212static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3213 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3214{
3215 struct nfs4_exception exception = { };
3216 int err;
3217 do {
3218 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3219 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3220 pages, count, plus),
1da177e4
LT		 3221 &exception);
3222 } while (exception.retry);
3223 return err;
3224}
3225
3226static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3227 struct iattr *sattr, dev_t rdev)
3228{
57dc9a57
TM		 3229 struct nfs4_createdata *data;
3230 int mode = sattr->ia_mode;
3231 int status = -ENOMEM;
1da177e4 3232
57dc9a57
TM		 3233 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3234 if (data == NULL)
3235 goto out;
3236
1da177e4 3237 if (S_ISFIFO(mode))
57dc9a57 3238 data->arg.ftype = NF4FIFO;
1da177e4 3239 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3240 data->arg.ftype = NF4BLK;
3241 data->arg.u.device.specdata1 = MAJOR(rdev);
3242 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3243 }
3244 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3245 data->arg.ftype = NF4CHR;
3246 data->arg.u.device.specdata1 = MAJOR(rdev);
3247 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3248 } else if (!S_ISSOCK(mode)) {
3249 status = -EINVAL;
3250 goto out_free;
1da177e4 3251 }
1da177e4 3252
57dc9a57 3253 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3254out_free:
57dc9a57
TM		 3255 nfs4_free_createdata(data);
3256out:
1da177e4
LT		 3257 return status;
3258}
3259
3260static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3261 struct iattr *sattr, dev_t rdev)
3262{
3263 struct nfs4_exception exception = { };
3264 int err;
a8a5da99
AK		 3265
3266 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3267 do {
3268 err = nfs4_handle_exception(NFS_SERVER(dir),
3269 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3270 &exception);
3271 } while (exception.retry);
3272 return err;
3273}
3274
3275static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3276 struct nfs_fsstat *fsstat)
3277{
3278 struct nfs4_statfs_arg args = {
3279 .fh = fhandle,
3280 .bitmask = server->attr_bitmask,
3281 };
24ad148a
BH		 3282 struct nfs4_statfs_res res = {
3283 .fsstat = fsstat,
3284 };
1da177e4
LT		 3285 struct rpc_message msg = {
3286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3287 .rpc_argp = &args,
24ad148a 3288 .rpc_resp = &res,
1da177e4
LT		 3289 };
3290
0e574af1 3291 nfs_fattr_init(fsstat->fattr);
7c513058 3292 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3293}
3294
3295static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3296{
3297 struct nfs4_exception exception = { };
3298 int err;
3299 do {
3300 err = nfs4_handle_exception(server,
3301 _nfs4_proc_statfs(server, fhandle, fsstat),
3302 &exception);
3303 } while (exception.retry);
3304 return err;
3305}
3306
3307static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3308 struct nfs_fsinfo *fsinfo)
3309{
3310 struct nfs4_fsinfo_arg args = {
3311 .fh = fhandle,
3312 .bitmask = server->attr_bitmask,
3313 };
3dda5e43
BH		 3314 struct nfs4_fsinfo_res res = {
3315 .fsinfo = fsinfo,
3316 };
1da177e4
LT		 3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3319 .rpc_argp = &args,
3dda5e43 3320 .rpc_resp = &res,
1da177e4
LT		 3321 };
3322
7c513058 3323 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3324}
3325
3326static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3327{
3328 struct nfs4_exception exception = { };
3329 int err;
3330
3331 do {
3332 err = nfs4_handle_exception(server,
3333 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3334 &exception);
3335 } while (exception.retry);
3336 return err;
3337}
3338
3339static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3340{
e38eb650
BS		 3341 int error;
3342
0e574af1 3343 nfs_fattr_init(fsinfo->fattr);
e38eb650 3344 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3345 if (error == 0) {
3346 /* block layout checks this! */
3347 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3348 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3349 }
e38eb650
BS		 3350
3351 return error;
1da177e4
LT		 3352}
3353
3354static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_pathconf *pathconf)
3356{
3357 struct nfs4_pathconf_arg args = {
3358 .fh = fhandle,
3359 .bitmask = server->attr_bitmask,
3360 };
d45b2989
BH		 3361 struct nfs4_pathconf_res res = {
3362 .pathconf = pathconf,
3363 };
1da177e4
LT		 3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3366 .rpc_argp = &args,
d45b2989 3367 .rpc_resp = &res,
1da177e4
LT		 3368 };
3369
3370 /* None of the pathconf attributes are mandatory to implement */
3371 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3372 memset(pathconf, 0, sizeof(*pathconf));
3373 return 0;
3374 }
3375
0e574af1 3376 nfs_fattr_init(pathconf->fattr);
7c513058 3377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3378}
3379
3380static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3381 struct nfs_pathconf *pathconf)
3382{
3383 struct nfs4_exception exception = { };
3384 int err;
3385
3386 do {
3387 err = nfs4_handle_exception(server,
3388 _nfs4_proc_pathconf(server, fhandle, pathconf),
3389 &exception);
3390 } while (exception.retry);
3391 return err;
3392}
3393
d20581aa
BH		 3394void __nfs4_read_done_cb(struct nfs_read_data *data)
3395{
cd841605 3396 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3397}
3398
cbdabc7f 3399static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3400{
cd841605 3401 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3402
9e33bed5 3403 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3404 rpc_restart_call_prepare(task);
ec06c096 3405 return -EAGAIN;
1da177e4 3406 }
8850df99 3407
d20581aa 3408 __nfs4_read_done_cb(data);
1da177e4 3409 if (task->tk_status > 0)
ec06c096
TM		 3410 renew_lease(server, data->timestamp);
3411 return 0;
1da177e4
LT		 3412}
3413
cbdabc7f
AA		 3414static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3415{
3416
3417 dprintk("--> %s\n", __func__);
3418
3419 if (!nfs4_sequence_done(task, &data->res.seq_res))
3420 return -EAGAIN;
3421
d20581aa
BH		 3422 return data->read_done_cb ? data->read_done_cb(task, data) :
3423 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3424}
3425
bdc7f021 3426static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3427{
1da177e4 3428 data->timestamp = jiffies;
cbdabc7f 3429 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3430 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3431 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3432}
3433
ea7c3303
BS		 3434static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3435{
d9afbd1b
TM		 3436 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3437 &data->args.seq_args,
3438 &data->res.seq_res,
3439 task);
1da177e4
LT		 3440}
3441
b029bc9b 3442static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3443{
cd841605 3444 struct inode *inode = data->header->inode;
1da177e4 3445
9e33bed5 3446 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3447 rpc_restart_call_prepare(task);
788e7a89 3448 return -EAGAIN;
1da177e4 3449 }
4f9838c7 3450 if (task->tk_status >= 0) {
1da177e4 3451 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3452 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3453 }
788e7a89 3454 return 0;
1da177e4
LT		 3455}
3456
b029bc9b
FI		 3457static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3458{
3459 if (!nfs4_sequence_done(task, &data->res.seq_res))
3460 return -EAGAIN;
d20581aa
BH		 3461 return data->write_done_cb ? data->write_done_cb(task, data) :
3462 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3463}
3464
5a37f851
TM		 3465static
3466bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3467{
5a37f851
TM		 3468 const struct nfs_pgio_header *hdr = data->header;
3469
3470 /* Don't request attributes for pNFS or O_DIRECT writes */
3471 if (data->ds_clp != NULL || hdr->dreq != NULL)
3472 return false;
3473 /* Otherwise, request attributes if and only if we don't hold
3474 * a delegation
3475 */
011e2a7f 3476 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3477}
a69aef14 3478
bdc7f021 3479static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3480{
cd841605 3481 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3482
5a37f851 3483 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3484 data->args.bitmask = NULL;
3485 data->res.fattr = NULL;
3486 } else
3487 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3488
b029bc9b
FI		 3489 if (!data->write_done_cb)
3490 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3491 data->res.server = server;
1da177e4
LT		 3492 data->timestamp = jiffies;
3493
bdc7f021 3494 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3495 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3496}
3497
c6cb80d0
BS		 3498static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3499{
d9afbd1b
TM		 3500 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3501 &data->args.seq_args,
3502 &data->res.seq_res,
3503 task);
1da177e4
LT		 3504}
3505
0b7c0153 3506static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3507{
d9afbd1b
TM		 3508 nfs4_setup_sequence(NFS_SERVER(data->inode),
3509 &data->args.seq_args,
3510 &data->res.seq_res,
3511 task);
1da177e4
LT		 3512}
3513
0b7c0153 3514static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3515{
1da177e4 3516 struct inode *inode = data->inode;
14516c3a 3517
9e33bed5 3518 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3519 rpc_restart_call_prepare(task);
788e7a89 3520 return -EAGAIN;
1da177e4 3521 }
788e7a89 3522 return 0;
1da177e4
LT		 3523}
3524
0b7c0153 3525static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3526{
3527 if (!nfs4_sequence_done(task, &data->res.seq_res))
3528 return -EAGAIN;
0b7c0153 3529 return data->commit_done_cb(task, data);
5f452431
FI		 3530}
3531
0b7c0153 3532static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3533{
788e7a89 3534 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3535
0b7c0153
FI		 3536 if (data->commit_done_cb == NULL)
3537 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3538 data->res.server = server;
bdc7f021 3539 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3540 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3541}
3542
9bc4e3ca
CL		 3543struct nfs4_renewdata {
3544 struct nfs_client *client;
3545 unsigned long timestamp;
3546};
3547
1da177e4
LT		 3548/*
3549 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3550 * standalone procedure for queueing an asynchronous RENEW.
3551 */
9bc4e3ca 3552static void nfs4_renew_release(void *calldata)
dc96aef9 3553{
9bc4e3ca
CL		 3554 struct nfs4_renewdata *data = calldata;
3555 struct nfs_client *clp = data->client;
dc96aef9 3556
0851de06
AB		 3557 if (atomic_read(&clp->cl_count) > 1)
3558 nfs4_schedule_state_renewal(clp);
3559 nfs_put_client(clp);
9bc4e3ca 3560 kfree(data);
dc96aef9
AB		 3561}
3562
9bc4e3ca 3563static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3564{
9bc4e3ca
CL		 3565 struct nfs4_renewdata *data = calldata;
3566 struct nfs_client *clp = data->client;
3567 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3568
3569 if (task->tk_status < 0) {
95baa25c 3570 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3571 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3572 return;
3573 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3574 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3575 return;
3576 }
3577 nfs4_schedule_path_down_recovery(clp);
1da177e4 3578 }
452e9352 3579 do_renew_lease(clp, timestamp);
1da177e4
LT		 3580}
3581
963d8fe5
TM		 3582static const struct rpc_call_ops nfs4_renew_ops = {
3583 .rpc_call_done = nfs4_renew_done,
dc96aef9 3584 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3585};
3586
2f60ea6b 3587static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3588{
3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3591 .rpc_argp = clp,
b4454fe1 3592 .rpc_cred = cred,
1da177e4 3593 };
9bc4e3ca 3594 struct nfs4_renewdata *data;
1da177e4 3595
2f60ea6b
TM		 3596 if (renew_flags == 0)
3597 return 0;
0851de06
AB		 3598 if (!atomic_inc_not_zero(&clp->cl_count))
3599 return -EIO;
b569ad34 3600 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3601 if (data == NULL)
3602 return -ENOMEM;
3603 data->client = clp;
3604 data->timestamp = jiffies;
1da177e4 3605 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3606 &nfs4_renew_ops, data);
1da177e4
LT		 3607}
3608
8534d4ec 3609static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3610{
3611 struct rpc_message msg = {
3612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3613 .rpc_argp = clp,
b4454fe1 3614 .rpc_cred = cred,
1da177e4
LT		 3615 };
3616 unsigned long now = jiffies;
3617 int status;
3618
3619 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3620 if (status < 0)
3621 return status;
452e9352 3622 do_renew_lease(clp, now);
1da177e4
LT		 3623 return 0;
3624}
3625
aa1870af
BF		 3626static inline int nfs4_server_supports_acls(struct nfs_server *server)
3627{
3628 return (server->caps & NFS_CAP_ACLS)
3629 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3630 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3631}
3632
21f498c2
TM		 3633/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3634 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3635 * the stack.
3636 */
21f498c2 3637#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3638
e9e3d724
NH		 3639static int buf_to_pages_noslab(const void *buf, size_t buflen,
3640 struct page **pages, unsigned int *pgbase)
3641{
3642 struct page *newpage, **spages;
3643 int rc = 0;
3644 size_t len;
3645 spages = pages;
3646
3647 do {
21f498c2 3648 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3649 newpage = alloc_page(GFP_KERNEL);
3650
3651 if (newpage == NULL)
3652 goto unwind;
3653 memcpy(page_address(newpage), buf, len);
3654 buf += len;
3655 buflen -= len;
3656 *pages++ = newpage;
3657 rc++;
3658 } while (buflen != 0);
3659
3660 return rc;
3661
3662unwind:
3663 for(; rc > 0; rc--)
3664 __free_page(spages[rc-1]);
3665 return -ENOMEM;
3666}
3667
e50a1c2e
BF		 3668struct nfs4_cached_acl {
3669 int cached;
3670 size_t len;
3e9d4154 3671 char data[0];
e50a1c2e
BF		 3672};
3673
3674static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3675{
3676 struct nfs_inode *nfsi = NFS_I(inode);
3677
3678 spin_lock(&inode->i_lock);
3679 kfree(nfsi->nfs4_acl);
3680 nfsi->nfs4_acl = acl;
3681 spin_unlock(&inode->i_lock);
3682}
3683
3684static void nfs4_zap_acl_attr(struct inode *inode)
3685{
3686 nfs4_set_cached_acl(inode, NULL);
3687}
3688
3689static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3690{
3691 struct nfs_inode *nfsi = NFS_I(inode);
3692 struct nfs4_cached_acl *acl;
3693 int ret = -ENOENT;
3694
3695 spin_lock(&inode->i_lock);
3696 acl = nfsi->nfs4_acl;
3697 if (acl == NULL)
3698 goto out;
3699 if (buf == NULL) /* user is just asking for length */
3700 goto out_len;
3701 if (acl->cached == 0)
3702 goto out;
3703 ret = -ERANGE; /* see getxattr(2) man page */
3704 if (acl->len > buflen)
3705 goto out;
3706 memcpy(buf, acl->data, acl->len);
3707out_len:
3708 ret = acl->len;
3709out:
3710 spin_unlock(&inode->i_lock);
3711 return ret;
3712}
3713
5794d21e 3714static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3715{
3716 struct nfs4_cached_acl *acl;
b291f1b1 3717 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3718
1f1ea6c2 3719 if (buflen <= PAGE_SIZE) {
b291f1b1 3720 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3721 if (acl == NULL)
3722 goto out;
3723 acl->cached = 1;
5794d21e 3724 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3725 } else {
3726 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3727 if (acl == NULL)
3728 goto out;
3729 acl->cached = 0;
3730 }
3731 acl->len = acl_len;
3732out:
3733 nfs4_set_cached_acl(inode, acl);
3734}
3735
bf118a34
AA		 3736/*
3737 * The getxattr API returns the required buffer length when called with a
3738 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3739 * the required buf. On a NULL buf, we send a page of data to the server
3740 * guessing that the ACL request can be serviced by a page. If so, we cache
3741 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3742 * the cache. If not so, we throw away the page, and cache the required
3743 * length. The next getxattr call will then produce another round trip to
3744 * the server, this time with the input buf of the required size.
3745 */
16b4289c 3746static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3747{
bf118a34 3748 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3749 struct nfs_getaclargs args = {
3750 .fh = NFS_FH(inode),
3751 .acl_pages = pages,
3752 .acl_len = buflen,
3753 };
663c79b3
BH		 3754 struct nfs_getaclres res = {
3755 .acl_len = buflen,
3756 };
aa1870af
BF		 3757 struct rpc_message msg = {
3758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3759 .rpc_argp = &args,
663c79b3 3760 .rpc_resp = &res,
aa1870af 3761 };
21f498c2
TM		 3762 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3763 int ret = -ENOMEM, i;
aa1870af 3764
bf118a34
AA		 3765 /* As long as we're doing a round trip to the server anyway,
3766 * let's be prepared for a page of acl data. */
3767 if (npages == 0)
3768 npages = 1;
21f498c2
TM		 3769 if (npages > ARRAY_SIZE(pages))
3770 return -ERANGE;
5a006899 3771
bf118a34
AA		 3772 for (i = 0; i < npages; i++) {
3773 pages[i] = alloc_page(GFP_KERNEL);
3774 if (!pages[i])
3775 goto out_free;
e50a1c2e 3776 }
5a006899
SP		 3777
3778 /* for decoding across pages */
3779 res.acl_scratch = alloc_page(GFP_KERNEL);
3780 if (!res.acl_scratch)
3781 goto out_free;
3782
bf118a34
AA		 3783 args.acl_len = npages * PAGE_SIZE;
3784 args.acl_pgbase = 0;
5a006899 3785
de040bec 3786 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3787 __func__, buf, buflen, npages, args.acl_len);
3788 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3789 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3790 if (ret)
3791 goto out_free;
bf118a34 3792
1f1ea6c2
TM		 3793 /* Handle the case where the passed-in buffer is too short */
3794 if (res.acl_flags & NFS4_ACL_TRUNC) {
3795 /* Did the user only issue a request for the acl length? */
3796 if (buf == NULL)
3797 goto out_ok;
e50a1c2e 3798 ret = -ERANGE;
1f1ea6c2 3799 goto out_free;
e50a1c2e 3800 }
1f1ea6c2 3801 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3802 if (buf) {
3803 if (res.acl_len > buflen) {
3804 ret = -ERANGE;
3805 goto out_free;
3806 }
1f1ea6c2 3807 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3808 }
1f1ea6c2
TM		 3809out_ok:
3810 ret = res.acl_len;
e50a1c2e 3811out_free:
bf118a34
AA		 3812 for (i = 0; i < npages; i++)
3813 if (pages[i])
3814 __free_page(pages[i]);
331818f1
TM		 3815 if (res.acl_scratch)
3816 __free_page(res.acl_scratch);
aa1870af
BF		 3817 return ret;
3818}
3819
16b4289c
TM		 3820static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3821{
3822 struct nfs4_exception exception = { };
3823 ssize_t ret;
3824 do {
3825 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3826 if (ret >= 0)
3827 break;
3828 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3829 } while (exception.retry);
3830 return ret;
3831}
3832
e50a1c2e
BF		 3833static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3834{
3835 struct nfs_server *server = NFS_SERVER(inode);
3836 int ret;
3837
3838 if (!nfs4_server_supports_acls(server))
3839 return -EOPNOTSUPP;
3840 ret = nfs_revalidate_inode(server, inode);
3841 if (ret < 0)
3842 return ret;
08a22b39
AK		 3843 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3844 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3845 ret = nfs4_read_cached_acl(inode, buf, buflen);
3846 if (ret != -ENOENT)
bf118a34
AA		 3847 /* -ENOENT is returned if there is no ACL or if there is an ACL
3848 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3849 return ret;
3850 return nfs4_get_acl_uncached(inode, buf, buflen);
3851}
3852
16b4289c 3853static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3854{
3855 struct nfs_server *server = NFS_SERVER(inode);
3856 struct page *pages[NFS4ACL_MAXPAGES];
3857 struct nfs_setaclargs arg = {
3858 .fh = NFS_FH(inode),
3859 .acl_pages = pages,
3860 .acl_len = buflen,
3861 };
73c403a9 3862 struct nfs_setaclres res;
4b580ee3
BF		 3863 struct rpc_message msg = {
3864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3865 .rpc_argp = &arg,
73c403a9 3866 .rpc_resp = &res,
4b580ee3 3867 };
21f498c2 3868 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3869 int ret, i;
4b580ee3
BF		 3870
3871 if (!nfs4_server_supports_acls(server))
3872 return -EOPNOTSUPP;
21f498c2
TM		 3873 if (npages > ARRAY_SIZE(pages))
3874 return -ERANGE;
e9e3d724
NH		 3875 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3876 if (i < 0)
3877 return i;
57ec14c5 3878 nfs4_inode_return_delegation(inode);
7c513058 3879 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3880
3881 /*
3882 * Free each page after tx, so the only ref left is
3883 * held by the network stack
3884 */
3885 for (; i > 0; i--)
3886 put_page(pages[i-1]);
3887
08a22b39
AK		 3888 /*
3889 * Acl update can result in inode attribute update.
3890 * so mark the attribute cache invalid.
3891 */
3892 spin_lock(&inode->i_lock);
3893 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3894 spin_unlock(&inode->i_lock);
f41f7418
TM		 3895 nfs_access_zap_cache(inode);
3896 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3897 return ret;
3898}
3899
16b4289c
TM		 3900static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3901{
3902 struct nfs4_exception exception = { };
3903 int err;
3904 do {
3905 err = nfs4_handle_exception(NFS_SERVER(inode),
3906 __nfs4_proc_set_acl(inode, buf, buflen),
3907 &exception);
3908 } while (exception.retry);
3909 return err;
3910}
3911
1da177e4 3912static int
aa5190d0 3913nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3914{
aa5190d0
TM		 3915 struct nfs_client *clp = server->nfs_client;
3916
3917 if (task->tk_status >= 0)
1da177e4
LT		 3918 return 0;
3919 switch(task->tk_status) {
a1d0b5ee 3920 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3921 case -NFS4ERR_ADMIN_REVOKED:
3922 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3923 if (state == NULL)
3924 break;
3925 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3926 case -NFS4ERR_OPENMODE:
3927 if (state == NULL)
3928 break;
0400a6b0
TM		 3929 nfs4_schedule_stateid_recovery(server, state);
3930 goto wait_on_recovery;
0ced63d1
TM		 3931 case -NFS4ERR_EXPIRED:
3932 if (state != NULL)
3933 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3934 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3935 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3936 nfs4_schedule_lease_recovery(clp);
3937 goto wait_on_recovery;
4745e315
AA		 3938#if defined(CONFIG_NFS_V4_1)
3939 case -NFS4ERR_BADSESSION:
3940 case -NFS4ERR_BADSLOT:
3941 case -NFS4ERR_BAD_HIGH_SLOT:
3942 case -NFS4ERR_DEADSESSION:
3943 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3944 case -NFS4ERR_SEQ_FALSE_RETRY:
3945 case -NFS4ERR_SEQ_MISORDERED:
3946 dprintk("%s ERROR %d, Reset session\n", __func__,
3947 task->tk_status);
9f594791 3948 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3949 task->tk_status = 0;
3950 return -EAGAIN;
3951#endif /* CONFIG_NFS_V4_1 */
1da177e4 3952 case -NFS4ERR_DELAY:
aa5190d0 3953 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3954 case -NFS4ERR_GRACE:
1da177e4
LT		 3955 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3956 task->tk_status = 0;
3957 return -EAGAIN;
a8a4ae3a 3958 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3959 case -NFS4ERR_OLD_STATEID:
3960 task->tk_status = 0;
3961 return -EAGAIN;
3962 }
3963 task->tk_status = nfs4_map_errors(task->tk_status);
3964 return 0;
0400a6b0 3965wait_on_recovery:
a2c0b9e2 3966 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3967 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3968 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3969 task->tk_status = 0;
3970 return -EAGAIN;
1da177e4
LT		 3971}
3972
f092075d
CL		 3973static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3974 nfs4_verifier *bootverf)
cd93710e
CL		 3975{
3976 __be32 verf[2];
3977
2c820d9a
CL		 3978 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3979 /* An impossible timestamp guarantees this value
3980 * will never match a generated boot time. */
3981 verf[0] = 0;
3982 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3983 } else {
f092075d
CL		 3984 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3985 verf[0] = (__be32)nn->boot_time.tv_sec;
3986 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3987 }
cd93710e
CL		 3988 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3989}
3990
e984a55a
CL		 3991static unsigned int
3992nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
3993 char *buf, size_t len)
3994{
3995 unsigned int result;
3996
3997 rcu_read_lock();
3998 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
3999 clp->cl_ipaddr,
4000 rpc_peeraddr2str(clp->cl_rpcclient,
4001 RPC_DISPLAY_ADDR),
4002 rpc_peeraddr2str(clp->cl_rpcclient,
4003 RPC_DISPLAY_PROTO));
4004 rcu_read_unlock();
4005 return result;
4006}
4007
4008static unsigned int
4009nfs4_init_uniform_client_string(const struct nfs_client *clp,
4010 char *buf, size_t len)
4011{
6f2ea7f2
CL		 4012 char *nodename = clp->cl_rpcclient->cl_nodename;
4013
4014 if (nfs4_client_id_uniquifier[0] != '\0')
4015 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4016 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4017 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4018 nodename);
e984a55a
CL		 4019}
4020
6bbb4ae8
CL		 4021/**
4022 * nfs4_proc_setclientid - Negotiate client ID
4023 * @clp: state data structure
4024 * @program: RPC program for NFSv4 callback service
4025 * @port: IP port number for NFS4 callback service
4026 * @cred: RPC credential to use for this call
4027 * @res: where to place the result
4028 *
4029 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4030 */
bb8b27e5
TM		 4031int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4032 unsigned short port, struct rpc_cred *cred,
4033 struct nfs4_setclientid_res *res)
1da177e4
LT		 4034{
4035 nfs4_verifier sc_verifier;
4036 struct nfs4_setclientid setclientid = {
4037 .sc_verifier = &sc_verifier,
4038 .sc_prog = program,
f4eecd5d 4039 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4040 };
4041 struct rpc_message msg = {
4042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4043 .rpc_argp = &setclientid,
bb8b27e5 4044 .rpc_resp = res,
286d7d6a 4045 .rpc_cred = cred,
1da177e4 4046 };
6bbb4ae8 4047 int status;
1da177e4 4048
de734831 4049 /* nfs_client_id4 */
f092075d 4050 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4051 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4052 setclientid.sc_name_len =
4053 nfs4_init_uniform_client_string(clp,
4054 setclientid.sc_name,
4055 sizeof(setclientid.sc_name));
4056 else
4057 setclientid.sc_name_len =
4058 nfs4_init_nonuniform_client_string(clp,
4059 setclientid.sc_name,
4060 sizeof(setclientid.sc_name));
de734831 4061 /* cb_client4 */
e984a55a 4062 rcu_read_lock();
de734831 4063 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4064 sizeof(setclientid.sc_netid),
4065 rpc_peeraddr2str(clp->cl_rpcclient,
4066 RPC_DISPLAY_NETID));
de734831
CL		 4067 rcu_read_unlock();
4068 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4069 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4070 clp->cl_ipaddr, port >> 8, port & 255);
4071
6bbb4ae8
CL		 4072 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4073 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4074 setclientid.sc_name_len, setclientid.sc_name);
4075 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4076 dprintk("NFS reply setclientid: %d\n", status);
4077 return status;
1da177e4
LT		 4078}
4079
6bbb4ae8
CL		 4080/**
4081 * nfs4_proc_setclientid_confirm - Confirm client ID
4082 * @clp: state data structure
4083 * @res: result of a previous SETCLIENTID
4084 * @cred: RPC credential to use for this call
4085 *
4086 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4087 */
fd954ae1 4088int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4089 struct nfs4_setclientid_res *arg,
4090 struct rpc_cred *cred)
1da177e4
LT		 4091{
4092 struct nfs_fsinfo fsinfo;
4093 struct rpc_message msg = {
4094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4095 .rpc_argp = arg,
1da177e4 4096 .rpc_resp = &fsinfo,
286d7d6a 4097 .rpc_cred = cred,
1da177e4
LT		 4098 };
4099 unsigned long now;
4100 int status;
4101
6bbb4ae8
CL		 4102 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4103 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4104 clp->cl_clientid);
1da177e4 4105 now = jiffies;
1bd714f2 4106 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4107 if (status == 0) {
4108 spin_lock(&clp->cl_lock);
4109 clp->cl_lease_time = fsinfo.lease_time * HZ;
4110 clp->cl_last_renewal = now;
4111 spin_unlock(&clp->cl_lock);
4112 }
6bbb4ae8 4113 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4114 return status;
4115}
4116
fe650407
TM		 4117struct nfs4_delegreturndata {
4118 struct nfs4_delegreturnargs args;
fa178f29 4119 struct nfs4_delegreturnres res;
fe650407
TM		 4120 struct nfs_fh fh;
4121 nfs4_stateid stateid;
26e976a8 4122 unsigned long timestamp;
fa178f29 4123 struct nfs_fattr fattr;
fe650407
TM		 4124 int rpc_status;
4125};
4126
fe650407
TM		 4127static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4128{
4129 struct nfs4_delegreturndata *data = calldata;
938e1010 4130
14516c3a
TM		 4131 if (!nfs4_sequence_done(task, &data->res.seq_res))
4132 return;
938e1010 4133
79708861
RL		 4134 switch (task->tk_status) {
4135 case -NFS4ERR_STALE_STATEID:
4136 case -NFS4ERR_EXPIRED:
4137 case 0:
fa178f29 4138 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4139 break;
4140 default:
4141 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4142 -EAGAIN) {
d00c5d43 4143 rpc_restart_call_prepare(task);
79708861
RL		 4144 return;
4145 }
4146 }
4147 data->rpc_status = task->tk_status;
fe650407
TM		 4148}
4149
4150static void nfs4_delegreturn_release(void *calldata)
4151{
fe650407
TM		 4152 kfree(calldata);
4153}
4154
938e1010
AA		 4155#if defined(CONFIG_NFS_V4_1)
4156static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4157{
4158 struct nfs4_delegreturndata *d_data;
4159
4160 d_data = (struct nfs4_delegreturndata *)data;
4161
d9afbd1b
TM		 4162 nfs4_setup_sequence(d_data->res.server,
4163 &d_data->args.seq_args,
4164 &d_data->res.seq_res,
4165 task);
938e1010
AA		 4166}
4167#endif /* CONFIG_NFS_V4_1 */
4168
c8d149f3 4169static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4170#if defined(CONFIG_NFS_V4_1)
4171 .rpc_call_prepare = nfs4_delegreturn_prepare,
4172#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4173 .rpc_call_done = nfs4_delegreturn_done,
4174 .rpc_release = nfs4_delegreturn_release,
4175};
4176
e6f81075 4177static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4178{
4179 struct nfs4_delegreturndata *data;
fa178f29 4180 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4181 struct rpc_task *task;
5138fde0
TM		 4182 struct rpc_message msg = {
4183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4184 .rpc_cred = cred,
4185 };
c970aa85
TM		 4186 struct rpc_task_setup task_setup_data = {
4187 .rpc_client = server->client,
5138fde0 4188 .rpc_message = &msg,
c970aa85
TM		 4189 .callback_ops = &nfs4_delegreturn_ops,
4190 .flags = RPC_TASK_ASYNC,
4191 };
e6f81075 4192 int status = 0;
fe650407 4193
8535b2be 4194 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4195 if (data == NULL)
4196 return -ENOMEM;
9d12b216 4197 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4198 data->args.fhandle = &data->fh;
4199 data->args.stateid = &data->stateid;
9e907fec 4200 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4201 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4202 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4203 data->res.fattr = &data->fattr;
4204 data->res.server = server;
5138fde0 4205 nfs_fattr_init(data->res.fattr);
26e976a8 4206 data->timestamp = jiffies;
fe650407
TM		 4207 data->rpc_status = 0;
4208
c970aa85 4209 task_setup_data.callback_data = data;
1174dd1f
TM		 4210 msg.rpc_argp = &data->args;
4211 msg.rpc_resp = &data->res;
c970aa85 4212 task = rpc_run_task(&task_setup_data);
7a1218a2 4213 if (IS_ERR(task))
fe650407 4214 return PTR_ERR(task);
e6f81075
TM		 4215 if (!issync)
4216 goto out;
fe650407 4217 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4218 if (status != 0)
4219 goto out;
4220 status = data->rpc_status;
e144cbcc
TM		 4221 if (status == 0)
4222 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4223 else
4224 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4225out:
e6b3c4db 4226 rpc_put_task(task);
fe650407 4227 return status;
1da177e4
LT		 4228}
4229
e6f81075 4230int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4231{
4232 struct nfs_server *server = NFS_SERVER(inode);
4233 struct nfs4_exception exception = { };
4234 int err;
4235 do {
e6f81075 4236 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4237 switch (err) {
4238 case -NFS4ERR_STALE_STATEID:
4239 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4240 case 0:
4241 return 0;
4242 }
4243 err = nfs4_handle_exception(server, err, &exception);
4244 } while (exception.retry);
4245 return err;
4246}
4247
4248#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4249#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4250
4251/*
4252 * sleep, with exponential backoff, and retry the LOCK operation.
4253 */
4254static unsigned long
4255nfs4_set_lock_task_retry(unsigned long timeout)
4256{
d310310c 4257 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4258 timeout <<= 1;
4259 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4260 return NFS4_LOCK_MAXTIMEOUT;
4261 return timeout;
4262}
4263
1da177e4
LT		 4264static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4265{
4266 struct inode *inode = state->inode;
4267 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4268 struct nfs_client *clp = server->nfs_client;
911d1aaf 4269 struct nfs_lockt_args arg = {
1da177e4 4270 .fh = NFS_FH(inode),
911d1aaf 4271 .fl = request,
1da177e4 4272 };
911d1aaf
TM		 4273 struct nfs_lockt_res res = {
4274 .denied = request,
1da177e4
LT		 4275 };
4276 struct rpc_message msg = {
4277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4278 .rpc_argp = &arg,
4279 .rpc_resp = &res,
4280 .rpc_cred = state->owner->so_cred,
4281 };
1da177e4
LT		 4282 struct nfs4_lock_state *lsp;
4283 int status;
4284
911d1aaf 4285 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4286 status = nfs4_set_lock_state(state, request);
4287 if (status != 0)
4288 goto out;
4289 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4290 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4291 arg.lock_owner.s_dev = server->s_dev;
7c513058 4292 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4293 switch (status) {
4294 case 0:
4295 request->fl_type = F_UNLCK;
4296 break;
4297 case -NFS4ERR_DENIED:
4298 status = 0;
1da177e4 4299 }
70cc6487 4300 request->fl_ops->fl_release_private(request);
8d0a8a9d 4301out:
1da177e4
LT		 4302 return status;
4303}
4304
4305static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4306{
4307 struct nfs4_exception exception = { };
4308 int err;
4309
4310 do {
4311 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4312 _nfs4_proc_getlk(state, cmd, request),
4313 &exception);
4314 } while (exception.retry);
4315 return err;
4316}
4317
4318static int do_vfs_lock(struct file *file, struct file_lock *fl)
4319{
4320 int res = 0;
4321 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4322 case FL_POSIX:
4323 res = posix_lock_file_wait(file, fl);
4324 break;
4325 case FL_FLOCK:
4326 res = flock_lock_file_wait(file, fl);
4327 break;
4328 default:
4329 BUG();
4330 }
1da177e4
LT		 4331 return res;
4332}
4333
faf5f49c 4334struct nfs4_unlockdata {
911d1aaf
TM		 4335 struct nfs_locku_args arg;
4336 struct nfs_locku_res res;
faf5f49c
TM		 4337 struct nfs4_lock_state *lsp;
4338 struct nfs_open_context *ctx;
911d1aaf
TM		 4339 struct file_lock fl;
4340 const struct nfs_server *server;
26e976a8 4341 unsigned long timestamp;
faf5f49c
TM		 4342};
4343
911d1aaf
TM		 4344static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4345 struct nfs_open_context *ctx,
4346 struct nfs4_lock_state *lsp,
4347 struct nfs_seqid *seqid)
4348{
4349 struct nfs4_unlockdata *p;
4350 struct inode *inode = lsp->ls_state->inode;
4351
8535b2be 4352 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4353 if (p == NULL)
4354 return NULL;
4355 p->arg.fh = NFS_FH(inode);
4356 p->arg.fl = &p->fl;
4357 p->arg.seqid = seqid;
c1d51931 4358 p->res.seqid = seqid;
911d1aaf
TM		 4359 p->arg.stateid = &lsp->ls_stateid;
4360 p->lsp = lsp;
4361 atomic_inc(&lsp->ls_count);
4362 /* Ensure we don't close file until we're done freeing locks! */
4363 p->ctx = get_nfs_open_context(ctx);
4364 memcpy(&p->fl, fl, sizeof(p->fl));
4365 p->server = NFS_SERVER(inode);
4366 return p;
4367}
4368
06f814a3 4369static void nfs4_locku_release_calldata(void *data)
faf5f49c 4370{
963d8fe5 4371 struct nfs4_unlockdata *calldata = data;
911d1aaf 4372 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4373 nfs4_put_lock_state(calldata->lsp);
4374 put_nfs_open_context(calldata->ctx);
4375 kfree(calldata);
faf5f49c
TM		 4376}
4377
963d8fe5 4378static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4379{
963d8fe5 4380 struct nfs4_unlockdata *calldata = data;
faf5f49c 4381
14516c3a
TM		 4382 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4383 return;
faf5f49c
TM		 4384 switch (task->tk_status) {
4385 case 0:
f597c537
TM		 4386 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4387 &calldata->res.stateid);
26e976a8 4388 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4389 break;
9e33bed5
TM		 4390 case -NFS4ERR_BAD_STATEID:
4391 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4392 case -NFS4ERR_STALE_STATEID:
4393 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4394 break;
4395 default:
9e33bed5 4396 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4397 rpc_restart_call_prepare(task);
faf5f49c 4398 }
2b1bc308 4399 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4400}
4401
4ce70ada 4402static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4403{
4ce70ada 4404 struct nfs4_unlockdata *calldata = data;
faf5f49c 4405
911d1aaf 4406 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4407 return;
795a88c9 4408 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4409 /* Note: exit _without_ running nfs4_locku_done */
4410 task->tk_action = NULL;
b75ad4cd 4411 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4412 return;
4413 }
26e976a8 4414 calldata->timestamp = jiffies;
035168ab 4415 if (nfs4_setup_sequence(calldata->server,
a893693c 4416 &calldata->arg.seq_args,
2240a9e2
TM		 4417 &calldata->res.seq_res,
4418 task) != 0)
4419 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4420}
4421
963d8fe5 4422static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4423 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4424 .rpc_call_done = nfs4_locku_done,
06f814a3 4425 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4426};
4427
a5d16a4d
TM		 4428static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4429 struct nfs_open_context *ctx,
4430 struct nfs4_lock_state *lsp,
4431 struct nfs_seqid *seqid)
4432{
4433 struct nfs4_unlockdata *data;
5138fde0
TM		 4434 struct rpc_message msg = {
4435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4436 .rpc_cred = ctx->cred,
4437 };
c970aa85
TM		 4438 struct rpc_task_setup task_setup_data = {
4439 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4440 .rpc_message = &msg,
c970aa85 4441 .callback_ops = &nfs4_locku_ops,
101070ca 4442 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4443 .flags = RPC_TASK_ASYNC,
4444 };
a5d16a4d 4445
137d6aca
FF		 4446 /* Ensure this is an unlock - when canceling a lock, the
4447 * canceled lock is passed in, and it won't be an unlock.
4448 */
4449 fl->fl_type = F_UNLCK;
4450
a5d16a4d
TM		 4451 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4452 if (data == NULL) {
4453 nfs_free_seqid(seqid);
4454 return ERR_PTR(-ENOMEM);
4455 }
4456
9d12b216 4457 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4458 msg.rpc_argp = &data->arg;
4459 msg.rpc_resp = &data->res;
c970aa85
TM		 4460 task_setup_data.callback_data = data;
4461 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4462}
4463
faf5f49c
TM		 4464static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4465{
19e03c57 4466 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4467 struct nfs_seqid *seqid;
1da177e4 4468 struct nfs4_lock_state *lsp;
06f814a3
TM		 4469 struct rpc_task *task;
4470 int status = 0;
536ff0f8 4471 unsigned char fl_flags = request->fl_flags;
faf5f49c 4472
8d0a8a9d 4473 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4474 /* Unlock _before_ we do the RPC call */
4475 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4476 down_read(&nfsi->rwsem);
4477 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4478 up_read(&nfsi->rwsem);
9b073574 4479 goto out;
19e03c57
TM		 4480 }
4481 up_read(&nfsi->rwsem);
8d0a8a9d 4482 if (status != 0)
9b073574
TM		 4483 goto out;
4484 /* Is this a delegated lock? */
4485 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4486 goto out;
8d0a8a9d 4487 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4488 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4489 status = -ENOMEM;
911d1aaf 4490 if (seqid == NULL)
9b073574 4491 goto out;
cd3758e3 4492 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4493 status = PTR_ERR(task);
4494 if (IS_ERR(task))
9b073574 4495 goto out;
a5d16a4d 4496 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4497 rpc_put_task(task);
9b073574 4498out:
536ff0f8 4499 request->fl_flags = fl_flags;
1da177e4
LT		 4500 return status;
4501}
4502
a5d16a4d
TM		 4503struct nfs4_lockdata {
4504 struct nfs_lock_args arg;
4505 struct nfs_lock_res res;
4506 struct nfs4_lock_state *lsp;
4507 struct nfs_open_context *ctx;
4508 struct file_lock fl;
26e976a8 4509 unsigned long timestamp;
a5d16a4d
TM		 4510 int rpc_status;
4511 int cancelled;
66179efe 4512 struct nfs_server *server;
a5d16a4d
TM		 4513};
4514
4515static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4516 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4517 gfp_t gfp_mask)
1da177e4 4518{
a5d16a4d
TM		 4519 struct nfs4_lockdata *p;
4520 struct inode *inode = lsp->ls_state->inode;
1da177e4 4521 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4522
8535b2be 4523 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4524 if (p == NULL)
4525 return NULL;
4526
4527 p->arg.fh = NFS_FH(inode);
4528 p->arg.fl = &p->fl;
8535b2be 4529 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4530 if (p->arg.open_seqid == NULL)
4531 goto out_free;
8535b2be 4532 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4533 if (p->arg.lock_seqid == NULL)
2f74c0a0 4534 goto out_free_seqid;
a5d16a4d 4535 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4536 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4537 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4538 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4539 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4540 p->lsp = lsp;
66179efe 4541 p->server = server;
a5d16a4d
TM		 4542 atomic_inc(&lsp->ls_count);
4543 p->ctx = get_nfs_open_context(ctx);
4544 memcpy(&p->fl, fl, sizeof(p->fl));
4545 return p;
2f74c0a0
TM		 4546out_free_seqid:
4547 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4548out_free:
4549 kfree(p);
4550 return NULL;
4551}
4552
4553static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4554{
4555 struct nfs4_lockdata *data = calldata;
4556 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4557
3110ff80 4558 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4559 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4560 return;
a5d16a4d
TM		 4561 /* Do we need to do an open_to_lock_owner? */
4562 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4563 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4564 goto out_release_lock_seqid;
8fe72bac 4565 }
a5d16a4d
TM		 4566 data->arg.open_stateid = &state->stateid;
4567 data->arg.new_lock_owner = 1;
c1d51931 4568 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4569 } else
4570 data->arg.new_lock_owner = 0;
26e976a8 4571 data->timestamp = jiffies;
035168ab
TM		 4572 if (nfs4_setup_sequence(data->server,
4573 &data->arg.seq_args,
2240a9e2 4574 &data->res.seq_res,
d9afbd1b 4575 task) == 0)
66179efe 4576 return;
2240a9e2
TM		 4577 nfs_release_seqid(data->arg.open_seqid);
4578out_release_lock_seqid:
4579 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4580 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4581}
4582
a5d16a4d
TM		 4583static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4584{
4585 struct nfs4_lockdata *data = calldata;
4586
3110ff80 4587 dprintk("%s: begin!\n", __func__);
a5d16a4d 4588
14516c3a
TM		 4589 if (!nfs4_sequence_done(task, &data->res.seq_res))
4590 return;
66179efe 4591
a5d16a4d 4592 data->rpc_status = task->tk_status;
a5d16a4d 4593 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4594 if (data->rpc_status == 0)
4595 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4596 else
4597 goto out;
4598 }
4599 if (data->rpc_status == 0) {
f597c537 4600 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4601 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4602 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4603 }
a5d16a4d 4604out:
3110ff80 4605 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4606}
4607
4608static void nfs4_lock_release(void *calldata)
4609{
4610 struct nfs4_lockdata *data = calldata;
4611
3110ff80 4612 dprintk("%s: begin!\n", __func__);
2f74c0a0 4613 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4614 if (data->cancelled != 0) {
4615 struct rpc_task *task;
4616 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4617 data->arg.lock_seqid);
4618 if (!IS_ERR(task))
bf294b41 4619 rpc_put_task_async(task);
3110ff80 4620 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4621 } else
4622 nfs_free_seqid(data->arg.lock_seqid);
4623 nfs4_put_lock_state(data->lsp);
4624 put_nfs_open_context(data->ctx);
4625 kfree(data);
3110ff80 4626 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4627}
4628
4629static const struct rpc_call_ops nfs4_lock_ops = {
4630 .rpc_call_prepare = nfs4_lock_prepare,
4631 .rpc_call_done = nfs4_lock_done,
4632 .rpc_release = nfs4_lock_release,
4633};
4634
2bee72a6
TM		 4635static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4636{
2bee72a6
TM		 4637 switch (error) {
4638 case -NFS4ERR_ADMIN_REVOKED:
4639 case -NFS4ERR_BAD_STATEID:
ecac799a 4640 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4641 if (new_lock_owner != 0 ||
795a88c9 4642 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4643 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4644 break;
4645 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4646 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4647 case -NFS4ERR_EXPIRED:
4648 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4649 };
4650}
4651
afe6c27c 4652static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4653{
4654 struct nfs4_lockdata *data;
4655 struct rpc_task *task;
5138fde0
TM		 4656 struct rpc_message msg = {
4657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4658 .rpc_cred = state->owner->so_cred,
4659 };
c970aa85
TM		 4660 struct rpc_task_setup task_setup_data = {
4661 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4662 .rpc_message = &msg,
c970aa85 4663 .callback_ops = &nfs4_lock_ops,
101070ca 4664 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4665 .flags = RPC_TASK_ASYNC,
4666 };
a5d16a4d
TM		 4667 int ret;
4668
3110ff80 4669 dprintk("%s: begin!\n", __func__);
cd3758e3 4670 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4671 fl->fl_u.nfs4_fl.owner,
4672 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4673 if (data == NULL)
4674 return -ENOMEM;
4675 if (IS_SETLKW(cmd))
4676 data->arg.block = 1;
9d12b216 4677 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4678 msg.rpc_argp = &data->arg;
4679 msg.rpc_resp = &data->res;
c970aa85 4680 task_setup_data.callback_data = data;
8fe72bac
TM		 4681 if (recovery_type > NFS_LOCK_NEW) {
4682 if (recovery_type == NFS_LOCK_RECLAIM)
4683 data->arg.reclaim = NFS_LOCK_RECLAIM;
4684 nfs4_set_sequence_privileged(&data->arg.seq_args);
4685 }
c970aa85 4686 task = rpc_run_task(&task_setup_data);
7a1218a2 4687 if (IS_ERR(task))
a5d16a4d 4688 return PTR_ERR(task);
a5d16a4d
TM		 4689 ret = nfs4_wait_for_completion_rpc_task(task);
4690 if (ret == 0) {
4691 ret = data->rpc_status;
2bee72a6
TM		 4692 if (ret)
4693 nfs4_handle_setlk_error(data->server, data->lsp,
4694 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4695 } else
4696 data->cancelled = 1;
e6b3c4db 4697 rpc_put_task(task);
3110ff80 4698 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4699 return ret;
1da177e4
LT		 4700}
4701
4702static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4703{
202b50dc 4704 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4705 struct nfs4_exception exception = {
4706 .inode = state->inode,
4707 };
202b50dc
TM		 4708 int err;
4709
4710 do {
42a2d13e
TM		 4711 /* Cache the lock if possible... */
4712 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4713 return 0;
afe6c27c 4714 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4715 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4716 break;
4717 nfs4_handle_exception(server, err, &exception);
4718 } while (exception.retry);
4719 return err;
1da177e4
LT		 4720}
4721
4722static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4723{
202b50dc 4724 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4725 struct nfs4_exception exception = {
4726 .inode = state->inode,
4727 };
202b50dc
TM		 4728 int err;
4729
6bfc93ef
TM		 4730 err = nfs4_set_lock_state(state, request);
4731 if (err != 0)
4732 return err;
202b50dc 4733 do {
42a2d13e
TM		 4734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4735 return 0;
afe6c27c 4736 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4737 switch (err) {
4738 default:
4739 goto out;
4740 case -NFS4ERR_GRACE:
4741 case -NFS4ERR_DELAY:
4742 nfs4_handle_exception(server, err, &exception);
4743 err = 0;
4744 }
202b50dc 4745 } while (exception.retry);
a9ed2e25 4746out:
202b50dc 4747 return err;
1da177e4
LT		 4748}
4749
f062eb6c 4750#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4751/**
4752 * nfs41_check_expired_locks - possibly free a lock stateid
4753 *
4754 * @state: NFSv4 state for an inode
4755 *
4756 * Returns NFS_OK if recovery for this stateid is now finished.
4757 * Otherwise a negative NFS4ERR value is returned.
4758 */
b01dd1d8 4759static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4760{
eb64cf96 4761 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4762 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4763 struct nfs_server *server = NFS_SERVER(state->inode);
4764
b01dd1d8 4765 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4766 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4767 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4768 if (status != NFS_OK) {
3e60ffdd
CL		 4769 /* Free the stateid unless the server
4770 * informs us the stateid is unrecognized. */
89af2739
CL		 4771 if (status != -NFS4ERR_BAD_STATEID)
4772 nfs41_free_stateid(server,
4773 &lsp->ls_stateid);
795a88c9 4774 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4775 ret = status;
4776 }
4777 }
4778 };
4779
4780 return ret;
4781}
4782
4783static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4784{
4785 int status = NFS_OK;
4786
4787 if (test_bit(LK_STATE_IN_USE, &state->flags))
4788 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4789 if (status != NFS_OK)
4790 status = nfs4_lock_expired(state, request);
4791 return status;
f062eb6c
BS		 4792}
4793#endif
4794
1da177e4
LT		 4795static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4796{
19e03c57 4797 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4798 unsigned char fl_flags = request->fl_flags;
8e469ebd 4799 int status = -ENOLCK;
1da177e4 4800
8e469ebd
TM		 4801 if ((fl_flags & FL_POSIX) &&
4802 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4803 goto out;
6bfc93ef 4804 /* Is this a delegated open? */
6bfc93ef
TM		 4805 status = nfs4_set_lock_state(state, request);
4806 if (status != 0)
4807 goto out;
01c3b861
TM		 4808 request->fl_flags |= FL_ACCESS;
4809 status = do_vfs_lock(request->fl_file, request);
4810 if (status < 0)
4811 goto out;
19e03c57 4812 down_read(&nfsi->rwsem);
01c3b861 4813 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4814 /* Yes: cache locks! */
01c3b861 4815 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4816 request->fl_flags = fl_flags & ~FL_SLEEP;
4817 status = do_vfs_lock(request->fl_file, request);
4818 goto out_unlock;
01c3b861 4819 }
afe6c27c 4820 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4821 if (status != 0)
01c3b861 4822 goto out_unlock;
6bfc93ef 4823 /* Note: we always want to sleep here! */
01c3b861 4824 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4825 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4826 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4827 "manager!\n", __func__);
01c3b861 4828out_unlock:
19e03c57 4829 up_read(&nfsi->rwsem);
01c3b861
TM		 4830out:
4831 request->fl_flags = fl_flags;
1da177e4
LT		 4832 return status;
4833}
4834
4835static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4836{
a1d0b5ee
TM		 4837 struct nfs4_exception exception = {
4838 .state = state,
05ffe24f 4839 .inode = state->inode,
a1d0b5ee 4840 };
1da177e4
LT		 4841 int err;
4842
4843 do {
965b5d67
TM		 4844 err = _nfs4_proc_setlk(state, cmd, request);
4845 if (err == -NFS4ERR_DENIED)
4846 err = -EAGAIN;
1da177e4 4847 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4848 err, &exception);
1da177e4
LT		 4849 } while (exception.retry);
4850 return err;
4851}
4852
4853static int
4854nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4855{
4856 struct nfs_open_context *ctx;
4857 struct nfs4_state *state;
4858 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4859 int status;
4860
4861 /* verify open state */
cd3758e3 4862 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4863 state = ctx->state;
4864
4865 if (request->fl_start < 0 || request->fl_end < 0)
4866 return -EINVAL;
4867
d953126a
TM		 4868 if (IS_GETLK(cmd)) {
4869 if (state != NULL)
4870 return nfs4_proc_getlk(state, F_GETLK, request);
4871 return 0;
4872 }
1da177e4
LT		 4873
4874 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4875 return -EINVAL;
4876
d953126a
TM		 4877 if (request->fl_type == F_UNLCK) {
4878 if (state != NULL)
4879 return nfs4_proc_unlck(state, cmd, request);
4880 return 0;
4881 }
1da177e4 4882
d953126a
TM		 4883 if (state == NULL)
4884 return -ENOLCK;
55725513
TM		 4885 /*
4886 * Don't rely on the VFS having checked the file open mode,
4887 * since it won't do this for flock() locks.
4888 */
f44106e2 4889 switch (request->fl_type) {
55725513
TM		 4890 case F_RDLCK:
4891 if (!(filp->f_mode & FMODE_READ))
4892 return -EBADF;
4893 break;
4894 case F_WRLCK:
4895 if (!(filp->f_mode & FMODE_WRITE))
4896 return -EBADF;
4897 }
4898
1da177e4
LT		 4899 do {
4900 status = nfs4_proc_setlk(state, cmd, request);
4901 if ((status != -EAGAIN) || IS_SETLK(cmd))
4902 break;
4903 timeout = nfs4_set_lock_task_retry(timeout);
4904 status = -ERESTARTSYS;
4905 if (signalled())
4906 break;
4907 } while(status < 0);
1da177e4
LT		 4908 return status;
4909}
4910
888e694c
TM		 4911int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4912{
4913 struct nfs_server *server = NFS_SERVER(state->inode);
4914 struct nfs4_exception exception = { };
4915 int err;
4916
4917 err = nfs4_set_lock_state(state, fl);
4918 if (err != 0)
4919 goto out;
4920 do {
afe6c27c 4921 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4922 switch (err) {
4923 default:
a030889a
WAA		 4924 printk(KERN_ERR "NFS: %s: unhandled error "
4925 "%d.\n", __func__, err);
d5122201 4926 case 0:
965b5d67 4927 case -ESTALE:
d5122201
TM		 4928 goto out;
4929 case -NFS4ERR_EXPIRED:
0ced63d1 4930 nfs4_schedule_stateid_recovery(server, state);
d5122201 4931 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4932 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4933 nfs4_schedule_lease_recovery(server->nfs_client);
4934 goto out;
74e7bb73
RL		 4935 case -NFS4ERR_BADSESSION:
4936 case -NFS4ERR_BADSLOT:
4937 case -NFS4ERR_BAD_HIGH_SLOT:
4938 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4939 case -NFS4ERR_DEADSESSION:
9f594791 4940 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4941 goto out;
965b5d67
TM		 4942 case -ERESTARTSYS:
4943 /*
4944 * The show must go on: exit, but mark the
4945 * stateid as needing recovery.
4946 */
a1d0b5ee 4947 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4948 case -NFS4ERR_ADMIN_REVOKED:
4949 case -NFS4ERR_BAD_STATEID:
4950 case -NFS4ERR_OPENMODE:
0400a6b0 4951 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4952 err = 0;
4953 goto out;
4954 case -ENOMEM:
4955 case -NFS4ERR_DENIED:
4956 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4957 err = 0;
4958 goto out;
d5122201
TM		 4959 case -NFS4ERR_DELAY:
4960 break;
4961 }
888e694c
TM		 4962 err = nfs4_handle_exception(server, err, &exception);
4963 } while (exception.retry);
4964out:
4965 return err;
4966}
6b3b5496 4967
cf470c3e
TM		 4968struct nfs_release_lockowner_data {
4969 struct nfs4_lock_state *lsp;
5ae67c4f 4970 struct nfs_server *server;
cf470c3e
TM		 4971 struct nfs_release_lockowner_args args;
4972};
4973
d3c7b7cc
TM		 4974static void nfs4_release_lockowner_release(void *calldata)
4975{
cf470c3e 4976 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4977 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4978 kfree(calldata);
4979}
4980
17280175 4981static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4982 .rpc_release = nfs4_release_lockowner_release,
4983};
4984
cf470c3e 4985int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4986{
4987 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4988 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4989 struct rpc_message msg = {
4990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4991 };
4992
4993 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4994 return -EINVAL;
4995 data = kmalloc(sizeof(*data), GFP_NOFS);
4996 if (!data)
4997 return -ENOMEM;
4998 data->lsp = lsp;
5ae67c4f 4999 data->server = server;
cf470c3e
TM		 5000 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5001 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5002 data->args.lock_owner.s_dev = server->s_dev;
5003 msg.rpc_argp = &data->args;
5004 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5005 return 0;
d3c7b7cc
TM		 5006}
5007
aa1870af
BF		 5008#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5009
64c2ce8b
AK		 5010static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5011 const void *buf, size_t buflen,
5012 int flags, int type)
6b3b5496 5013{
64c2ce8b
AK		 5014 if (strcmp(key, "") != 0)
5015 return -EINVAL;
4b580ee3 5016
64c2ce8b 5017 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5018}
5019
64c2ce8b
AK		 5020static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5021 void *buf, size_t buflen, int type)
6b3b5496 5022{
64c2ce8b
AK		 5023 if (strcmp(key, "") != 0)
5024 return -EINVAL;
aa1870af 5025
64c2ce8b 5026 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5027}
5028
64c2ce8b
AK		 5029static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5030 size_t list_len, const char *name,
5031 size_t name_len, int type)
6b3b5496 5032{
64c2ce8b 5033 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5034
096455a2
BF		 5035 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5036 return 0;
64c2ce8b
AK		 5037
5038 if (list && len <= list_len)
5039 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5040 return len;
6b3b5496
BF		 5041}
5042
533eb461
AA		 5043/*
5044 * nfs_fhget will use either the mounted_on_fileid or the fileid
5045 */
69aaaae1
TM		 5046static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5047{
533eb461
AA		 5048 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5049 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5050 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5051 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5052 return;
5053
5054 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5055 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5056 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5057 fattr->nlink = 2;
5058}
5059
f05d147f
BS		 5060static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5061 const struct qstr *name,
5062 struct nfs4_fs_locations *fs_locations,
5063 struct page *page)
683b57b4
TM		 5064{
5065 struct nfs_server *server = NFS_SERVER(dir);
5066 u32 bitmask[2] = {
361e624f 5067 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5068 };
5069 struct nfs4_fs_locations_arg args = {
5070 .dir_fh = NFS_FH(dir),
c228fd3a 5071 .name = name,
683b57b4
TM		 5072 .page = page,
5073 .bitmask = bitmask,
5074 };
22958463
BH		 5075 struct nfs4_fs_locations_res res = {
5076 .fs_locations = fs_locations,
5077 };
683b57b4
TM		 5078 struct rpc_message msg = {
5079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5080 .rpc_argp = &args,
22958463 5081 .rpc_resp = &res,
683b57b4
TM		 5082 };
5083 int status;
5084
3110ff80 5085 dprintk("%s: start\n", __func__);
533eb461
AA		 5086
5087 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5088 * is not supported */
5089 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5090 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5091 else
5092 bitmask[0] |= FATTR4_WORD0_FILEID;
5093
c228fd3a 5094 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5095 fs_locations->server = server;
830b8e33 5096 fs_locations->nlocations = 0;
f05d147f 5097 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5098 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5099 return status;
5100}
5101
f05d147f
BS		 5102int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5103 const struct qstr *name,
5104 struct nfs4_fs_locations *fs_locations,
5105 struct page *page)
db0a9593
BS		 5106{
5107 struct nfs4_exception exception = { };
5108 int err;
5109 do {
5110 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5111 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5112 &exception);
5113 } while (exception.retry);
5114 return err;
5115}
5116
5a5ea0d4
BS		 5117static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5118{
5119 int status;
5120 struct nfs4_secinfo_arg args = {
5121 .dir_fh = NFS_FH(dir),
5122 .name = name,
5123 };
5124 struct nfs4_secinfo_res res = {
5125 .flavors = flavors,
5126 };
5127 struct rpc_message msg = {
5128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5129 .rpc_argp = &args,
5130 .rpc_resp = &res,
5131 };
5132
5133 dprintk("NFS call secinfo %s\n", name->name);
5134 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5135 dprintk("NFS reply secinfo: %d\n", status);
5136 return status;
5137}
5138
72de53ec
BS		 5139int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5140 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5141{
5142 struct nfs4_exception exception = { };
5143 int err;
5144 do {
5145 err = nfs4_handle_exception(NFS_SERVER(dir),
5146 _nfs4_proc_secinfo(dir, name, flavors),
5147 &exception);
5148 } while (exception.retry);
5149 return err;
5150}
5151
557134a3 5152#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5153/*
5154 * Check the exchange flags returned by the server for invalid flags, having
5155 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5156 * DS flags set.
5157 */
5158static int nfs4_check_cl_exchange_flags(u32 flags)
5159{
5160 if (flags & ~EXCHGID4_FLAG_MASK_R)
5161 goto out_inval;
5162 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5163 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5164 goto out_inval;
5165 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5166 goto out_inval;
5167 return NFS_OK;
5168out_inval:
5169 return -NFS4ERR_INVAL;
5170}
5171
78fe0f41 5172static bool
79d4e1f0
CL		 5173nfs41_same_server_scope(struct nfs41_server_scope *a,
5174 struct nfs41_server_scope *b)
78fe0f41
WAA		 5175{
5176 if (a->server_scope_sz == b->server_scope_sz &&
5177 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5178 return true;
5179
5180 return false;
5181}
5182
7c44f1ae
WAA		 5183/*
5184 * nfs4_proc_bind_conn_to_session()
5185 *
5186 * The 4.1 client currently uses the same TCP connection for the
5187 * fore and backchannel.
5188 */
2cf047c9 5189int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5190{
5191 int status;
5192 struct nfs41_bind_conn_to_session_res res;
5193 struct rpc_message msg = {
5194 .rpc_proc =
5195 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5196 .rpc_argp = clp,
5197 .rpc_resp = &res,
2cf047c9 5198 .rpc_cred = cred,
7c44f1ae
WAA		 5199 };
5200
5201 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5202
5203 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5204 if (unlikely(res.session == NULL)) {
5205 status = -ENOMEM;
5206 goto out;
5207 }
5208
5209 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5210 if (status == 0) {
5211 if (memcmp(res.session->sess_id.data,
5212 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5213 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5214 status = -EIO;
5215 goto out_session;
5216 }
5217 if (res.dir != NFS4_CDFS4_BOTH) {
5218 dprintk("NFS: %s: Unexpected direction from server\n",
5219 __func__);
5220 status = -EIO;
5221 goto out_session;
5222 }
5223 if (res.use_conn_in_rdma_mode) {
5224 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5225 __func__);
5226 status = -EIO;
5227 goto out_session;
5228 }
5229 }
5230out_session:
5231 kfree(res.session);
5232out:
5233 dprintk("<-- %s status= %d\n", __func__, status);
5234 return status;
5235}
5236
99fe60d0
BH		 5237/*
5238 * nfs4_proc_exchange_id()
5239 *
6bbb4ae8
CL		 5240 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5241 *
99fe60d0
BH		 5242 * Since the clientid has expired, all compounds using sessions
5243 * associated with the stale clientid will be returning
5244 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5245 * be in some phase of session reset.
5246 */
4d643d1d 5247int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5248{
5249 nfs4_verifier verifier;
5250 struct nfs41_exchange_id_args args = {
cd93710e 5251 .verifier = &verifier,
99fe60d0 5252 .client = clp,
357f54d6 5253 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5254 };
5255 struct nfs41_exchange_id_res res = {
32b01310 5256 0
99fe60d0
BH		 5257 };
5258 int status;
5259 struct rpc_message msg = {
5260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5261 .rpc_argp = &args,
5262 .rpc_resp = &res,
5263 .rpc_cred = cred,
5264 };
99fe60d0 5265
f092075d 5266 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5267 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5268 sizeof(args.id));
6bbb4ae8
CL		 5269 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5270 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5271 args.id_len, args.id);
99fe60d0 5272
acdeb69d 5273 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5274 GFP_NOFS);
acdeb69d 5275 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5276 status = -ENOMEM;
5277 goto out;
5278 }
78fe0f41 5279
79d4e1f0 5280 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5281 GFP_NOFS);
177313f1 5282 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5283 status = -ENOMEM;
acdeb69d 5284 goto out_server_owner;
abe9a6d5 5285 }
78fe0f41 5286
bbafffd2 5287 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5288 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5289 status = -ENOMEM;
5290 goto out_server_scope;
5291 }
5292
1bd714f2 5293 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5294 if (status == 0)
32b01310 5295 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5296
acdeb69d 5297 if (status == 0) {
32b01310
TM		 5298 clp->cl_clientid = res.clientid;
5299 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5300 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5301 clp->cl_seqid = res.seqid;
5302
acdeb69d
CL		 5303 kfree(clp->cl_serverowner);
5304 clp->cl_serverowner = res.server_owner;
5305 res.server_owner = NULL;
78fe0f41 5306
7d2ed9ac 5307 /* use the most recent implementation id */
59155546
CL		 5308 kfree(clp->cl_implid);
5309 clp->cl_implid = res.impl_id;
7d2ed9ac 5310
177313f1 5311 if (clp->cl_serverscope != NULL &&
79d4e1f0 5312 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5313 res.server_scope)) {
5314 dprintk("%s: server_scope mismatch detected\n",
5315 __func__);
5316 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5317 kfree(clp->cl_serverscope);
5318 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5319 }
5320
177313f1 5321 if (clp->cl_serverscope == NULL) {
79d4e1f0 5322 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5323 goto out;
5324 }
32b01310
TM		 5325 } else
5326 kfree(res.impl_id);
7d2ed9ac 5327
acdeb69d
CL		 5328out_server_owner:
5329 kfree(res.server_owner);
7d2ed9ac 5330out_server_scope:
abe9a6d5
WAA		 5331 kfree(res.server_scope);
5332out:
177313f1 5333 if (clp->cl_implid != NULL)
6bbb4ae8 5334 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5335 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5336 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5337 clp->cl_implid->date.seconds,
5338 clp->cl_implid->date.nseconds);
6bbb4ae8 5339 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5340 return status;
5341}
5342
66245539
TM		 5343static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5344 struct rpc_cred *cred)
5345{
5346 struct rpc_message msg = {
5347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5348 .rpc_argp = clp,
5349 .rpc_cred = cred,
5350 };
5351 int status;
5352
5353 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5354 if (status)
02c67525 5355 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5356 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5357 return status;
5358}
5359
5360static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5361 struct rpc_cred *cred)
5362{
5363 unsigned int loop;
5364 int ret;
5365
5366 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5367 ret = _nfs4_proc_destroy_clientid(clp, cred);
5368 switch (ret) {
5369 case -NFS4ERR_DELAY:
5370 case -NFS4ERR_CLIENTID_BUSY:
5371 ssleep(1);
5372 break;
5373 default:
5374 return ret;
5375 }
5376 }
5377 return 0;
5378}
5379
5380int nfs4_destroy_clientid(struct nfs_client *clp)
5381{
5382 struct rpc_cred *cred;
5383 int ret = 0;
5384
5385 if (clp->cl_mvops->minor_version < 1)
5386 goto out;
5387 if (clp->cl_exchange_flags == 0)
5388 goto out;
05f4c350
CL		 5389 if (clp->cl_preserve_clid)
5390 goto out;
66245539
TM		 5391 cred = nfs4_get_exchange_id_cred(clp);
5392 ret = nfs4_proc_destroy_clientid(clp, cred);
5393 if (cred)
5394 put_rpccred(cred);
5395 switch (ret) {
5396 case 0:
5397 case -NFS4ERR_STALE_CLIENTID:
5398 clp->cl_exchange_flags = 0;
5399 }
5400out:
5401 return ret;
5402}
5403
2050f0cc
AA		 5404struct nfs4_get_lease_time_data {
5405 struct nfs4_get_lease_time_args *args;
5406 struct nfs4_get_lease_time_res *res;
5407 struct nfs_client *clp;
5408};
5409
5410static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5411 void *calldata)
5412{
2050f0cc
AA		 5413 struct nfs4_get_lease_time_data *data =
5414 (struct nfs4_get_lease_time_data *)calldata;
5415
5416 dprintk("--> %s\n", __func__);
5417 /* just setup sequence, do not trigger session recovery
5418 since we're invoked within one */
d9afbd1b
TM		 5419 nfs41_setup_sequence(data->clp->cl_session,
5420 &data->args->la_seq_args,
5421 &data->res->lr_seq_res,
5422 task);
2050f0cc
AA		 5423 dprintk("<-- %s\n", __func__);
5424}
5425
5426/*
5427 * Called from nfs4_state_manager thread for session setup, so don't recover
5428 * from sequence operation or clientid errors.
5429 */
5430static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5431{
5432 struct nfs4_get_lease_time_data *data =
5433 (struct nfs4_get_lease_time_data *)calldata;
5434
5435 dprintk("--> %s\n", __func__);
14516c3a
TM		 5436 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5437 return;
2050f0cc
AA		 5438 switch (task->tk_status) {
5439 case -NFS4ERR_DELAY:
5440 case -NFS4ERR_GRACE:
5441 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5442 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5443 task->tk_status = 0;
a8a4ae3a
AA		 5444 /* fall through */
5445 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5446 rpc_restart_call_prepare(task);
2050f0cc
AA		 5447 return;
5448 }
2050f0cc
AA		 5449 dprintk("<-- %s\n", __func__);
5450}
5451
17280175 5452static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5453 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5454 .rpc_call_done = nfs4_get_lease_time_done,
5455};
5456
5457int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5458{
5459 struct rpc_task *task;
5460 struct nfs4_get_lease_time_args args;
5461 struct nfs4_get_lease_time_res res = {
5462 .lr_fsinfo = fsinfo,
5463 };
5464 struct nfs4_get_lease_time_data data = {
5465 .args = &args,
5466 .res = &res,
5467 .clp = clp,
5468 };
5469 struct rpc_message msg = {
5470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5471 .rpc_argp = &args,
5472 .rpc_resp = &res,
5473 };
5474 struct rpc_task_setup task_setup = {
5475 .rpc_client = clp->cl_rpcclient,
5476 .rpc_message = &msg,
5477 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5478 .callback_data = &data,
5479 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5480 };
5481 int status;
5482
9d12b216 5483 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5484 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5485 dprintk("--> %s\n", __func__);
5486 task = rpc_run_task(&task_setup);
5487
5488 if (IS_ERR(task))
5489 status = PTR_ERR(task);
5490 else {
5491 status = task->tk_status;
5492 rpc_put_task(task);
5493 }
5494 dprintk("<-- %s return %d\n", __func__, status);
5495
5496 return status;
5497}
5498
fc931582
AA		 5499/*
5500 * Initialize the values to be used by the client in CREATE_SESSION
5501 * If nfs4_init_session set the fore channel request and response sizes,
5502 * use them.
5503 *
5504 * Set the back channel max_resp_sz_cached to zero to force the client to
5505 * always set csa_cachethis to FALSE because the current implementation
5506 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5507 */
5508static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5509{
5510 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5511 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5512 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5513
5514 if (mxrqst_sz == 0)
5515 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5516 if (mxresp_sz == 0)
5517 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5518 /* Fore channel attributes */
fc931582
AA		 5519 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5520 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5521 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5522 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5523
5524 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5525 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5526 __func__,
5527 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5528 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5529
5530 /* Back channel attributes */
fc931582
AA		 5531 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5532 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5533 args->bc_attrs.max_resp_sz_cached = 0;
5534 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5535 args->bc_attrs.max_reqs = 1;
5536
5537 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5538 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5539 __func__,
5540 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5541 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5542 args->bc_attrs.max_reqs);
5543}
5544
43c2e885 5545static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5546{
43c2e885
BF		 5547 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5548 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5549
43c2e885
BF		 5550 if (rcvd->max_resp_sz > sent->max_resp_sz)
5551 return -EINVAL;
5552 /*
5553 * Our requested max_ops is the minimum we need; we're not
5554 * prepared to break up compounds into smaller pieces than that.
5555 * So, no point even trying to continue if the server won't
5556 * cooperate:
5557 */
5558 if (rcvd->max_ops < sent->max_ops)
5559 return -EINVAL;
5560 if (rcvd->max_reqs == 0)
5561 return -EINVAL;
b4b9a0c1
VG		 5562 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5563 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5564 return 0;
8d35301d
AA		 5565}
5566
43c2e885
BF		 5567static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5568{
5569 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5570 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5571
43c2e885
BF		 5572 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5573 return -EINVAL;
5574 if (rcvd->max_resp_sz < sent->max_resp_sz)
5575 return -EINVAL;
5576 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5577 return -EINVAL;
5578 /* These would render the backchannel useless: */
b4b9a0c1 5579 if (rcvd->max_ops != sent->max_ops)
43c2e885 5580 return -EINVAL;
b4b9a0c1 5581 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5582 return -EINVAL;
5583 return 0;
5584}
8d35301d 5585
8d35301d
AA		 5586static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5587 struct nfs4_session *session)
5588{
43c2e885 5589 int ret;
8d35301d 5590
43c2e885
BF		 5591 ret = nfs4_verify_fore_channel_attrs(args, session);
5592 if (ret)
5593 return ret;
5594 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5595}
5596
848f5bda
TM		 5597static int _nfs4_proc_create_session(struct nfs_client *clp,
5598 struct rpc_cred *cred)
fc931582
AA		 5599{
5600 struct nfs4_session *session = clp->cl_session;
5601 struct nfs41_create_session_args args = {
5602 .client = clp,
5603 .cb_program = NFS4_CALLBACK,
5604 };
5605 struct nfs41_create_session_res res = {
5606 .client = clp,
5607 };
5608 struct rpc_message msg = {
5609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5610 .rpc_argp = &args,
5611 .rpc_resp = &res,
848f5bda 5612 .rpc_cred = cred,
fc931582
AA		 5613 };
5614 int status;
5615
5616 nfs4_init_channel_attrs(&args);
0f91421e 5617 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5618
1bd714f2 5619 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5620
43095d39 5621 if (!status) {
8d35301d
AA		 5622 /* Verify the session's negotiated channel_attrs values */
5623 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5624 /* Increment the clientid slot sequence id */
5625 clp->cl_seqid++;
5626 }
5627
5628 return status;
5629}
5630
5631/*
5632 * Issues a CREATE_SESSION operation to the server.
5633 * It is the responsibility of the caller to verify the session is
5634 * expired before calling this routine.
5635 */
848f5bda 5636int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5637{
5638 int status;
5639 unsigned *ptr;
fc931582
AA		 5640 struct nfs4_session *session = clp->cl_session;
5641
5642 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5643
848f5bda 5644 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5645 if (status)
5646 goto out;
5647
aacd5537
AA		 5648 /* Init or reset the session slot tables */
5649 status = nfs4_setup_session_slot_tables(session);
5650 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5651 if (status)
5652 goto out;
5653
5654 ptr = (unsigned *)&session->sess_id.data[0];
5655 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5656 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5657out:
5658 dprintk("<-- %s\n", __func__);
5659 return status;
5660}
5661
0f3e66c6
AA		 5662/*
5663 * Issue the over-the-wire RPC DESTROY_SESSION.
5664 * The caller must serialize access to this routine.
5665 */
848f5bda
TM		 5666int nfs4_proc_destroy_session(struct nfs4_session *session,
5667 struct rpc_cred *cred)
0f3e66c6 5668{
848f5bda
TM		 5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5671 .rpc_argp = session,
5672 .rpc_cred = cred,
5673 };
0f3e66c6 5674 int status = 0;
0f3e66c6
AA		 5675
5676 dprintk("--> nfs4_proc_destroy_session\n");
5677
5678 /* session is still being setup */
5679 if (session->clp->cl_cons_state != NFS_CS_READY)
5680 return status;
5681
1bd714f2 5682 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5683
5684 if (status)
08106ac7 5685 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5686 "Session has been destroyed regardless...\n", status);
5687
5688 dprintk("<-- nfs4_proc_destroy_session\n");
5689 return status;
5690}
5691
fc01cea9
AA		 5692/*
5693 * Renew the cl_session lease.
5694 */
d5f8d3fe
TM		 5695struct nfs4_sequence_data {
5696 struct nfs_client *clp;
5697 struct nfs4_sequence_args args;
5698 struct nfs4_sequence_res res;
5699};
5700
dc96aef9
AB		 5701static void nfs41_sequence_release(void *data)
5702{
d5f8d3fe
TM		 5703 struct nfs4_sequence_data *calldata = data;
5704 struct nfs_client *clp = calldata->clp;
dc96aef9 5705
7135840f
AB		 5706 if (atomic_read(&clp->cl_count) > 1)
5707 nfs4_schedule_state_renewal(clp);
5708 nfs_put_client(clp);
d5f8d3fe 5709 kfree(calldata);
dc96aef9
AB		 5710}
5711
aa5190d0
TM		 5712static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5713{
5714 switch(task->tk_status) {
5715 case -NFS4ERR_DELAY:
aa5190d0
TM		 5716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5717 return -EAGAIN;
5718 default:
0400a6b0 5719 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5720 }
5721 return 0;
5722}
5723
dc96aef9 5724static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5725{
d5f8d3fe
TM		 5726 struct nfs4_sequence_data *calldata = data;
5727 struct nfs_client *clp = calldata->clp;
fc01cea9 5728
14516c3a
TM		 5729 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5730 return;
fc01cea9
AA		 5731
5732 if (task->tk_status < 0) {
5733 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5734 if (atomic_read(&clp->cl_count) == 1)
5735 goto out;
fc01cea9 5736
aa5190d0
TM		 5737 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5738 rpc_restart_call_prepare(task);
fc01cea9
AA		 5739 return;
5740 }
5741 }
fc01cea9 5742 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5743out:
fc01cea9
AA		 5744 dprintk("<-- %s\n", __func__);
5745}
5746
5747static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5748{
d5f8d3fe
TM		 5749 struct nfs4_sequence_data *calldata = data;
5750 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5751 struct nfs4_sequence_args *args;
5752 struct nfs4_sequence_res *res;
5753
fc01cea9
AA		 5754 args = task->tk_msg.rpc_argp;
5755 res = task->tk_msg.rpc_resp;
5756
d9afbd1b 5757 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5758}
5759
5760static const struct rpc_call_ops nfs41_sequence_ops = {
5761 .rpc_call_done = nfs41_sequence_call_done,
5762 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5763 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5764};
5765
8fe72bac
TM		 5766static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5767 struct rpc_cred *cred,
5768 bool is_privileged)
fc01cea9 5769{
d5f8d3fe 5770 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5771 struct rpc_message msg = {
5772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5773 .rpc_cred = cred,
5774 };
71ac6da9
TM		 5775 struct rpc_task_setup task_setup_data = {
5776 .rpc_client = clp->cl_rpcclient,
5777 .rpc_message = &msg,
8fe72bac 5778 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5779 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5780 };
fc01cea9 5781
7135840f 5782 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5783 return ERR_PTR(-EIO);
dfb4f309 5784 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5785 if (calldata == NULL) {
7135840f 5786 nfs_put_client(clp);
71ac6da9 5787 return ERR_PTR(-ENOMEM);
fc01cea9 5788 }
9d12b216 5789 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5790 if (is_privileged)
5791 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5792 msg.rpc_argp = &calldata->args;
5793 msg.rpc_resp = &calldata->res;
5794 calldata->clp = clp;
71ac6da9 5795 task_setup_data.callback_data = calldata;
fc01cea9 5796
71ac6da9
TM		 5797 return rpc_run_task(&task_setup_data);
5798}
5799
2f60ea6b 5800static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5801{
5802 struct rpc_task *task;
5803 int ret = 0;
5804
2f60ea6b
TM		 5805 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5806 return 0;
8fe72bac 5807 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5808 if (IS_ERR(task))
5809 ret = PTR_ERR(task);
5810 else
bf294b41 5811 rpc_put_task_async(task);
71ac6da9
TM		 5812 dprintk("<-- %s status=%d\n", __func__, ret);
5813 return ret;
5814}
5815
5816static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5817{
5818 struct rpc_task *task;
5819 int ret;
5820
8fe72bac 5821 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5822 if (IS_ERR(task)) {
5823 ret = PTR_ERR(task);
5824 goto out;
5825 }
5826 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5827 if (!ret) {
5828 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5829
5830 if (task->tk_status == 0)
5831 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5832 ret = task->tk_status;
b4410c2f 5833 }
71ac6da9
TM		 5834 rpc_put_task(task);
5835out:
5836 dprintk("<-- %s status=%d\n", __func__, ret);
5837 return ret;
fc01cea9
AA		 5838}
5839
fce5c838
RL		 5840struct nfs4_reclaim_complete_data {
5841 struct nfs_client *clp;
5842 struct nfs41_reclaim_complete_args arg;
5843 struct nfs41_reclaim_complete_res res;
5844};
5845
5846static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5847{
5848 struct nfs4_reclaim_complete_data *calldata = data;
5849
d9afbd1b
TM		 5850 nfs41_setup_sequence(calldata->clp->cl_session,
5851 &calldata->arg.seq_args,
5852 &calldata->res.seq_res,
5853 task);
fce5c838
RL		 5854}
5855
aa5190d0
TM		 5856static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5857{
5858 switch(task->tk_status) {
5859 case 0:
5860 case -NFS4ERR_COMPLETE_ALREADY:
5861 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5862 break;
5863 case -NFS4ERR_DELAY:
aa5190d0 5864 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5865 /* fall through */
5866 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5867 return -EAGAIN;
5868 default:
0400a6b0 5869 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5870 }
5871 return 0;
5872}
5873
fce5c838
RL		 5874static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5875{
5876 struct nfs4_reclaim_complete_data *calldata = data;
5877 struct nfs_client *clp = calldata->clp;
5878 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5879
5880 dprintk("--> %s\n", __func__);
14516c3a
TM		 5881 if (!nfs41_sequence_done(task, res))
5882 return;
fce5c838 5883
aa5190d0
TM		 5884 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5885 rpc_restart_call_prepare(task);
5886 return;
5887 }
fce5c838
RL		 5888 dprintk("<-- %s\n", __func__);
5889}
5890
5891static void nfs4_free_reclaim_complete_data(void *data)
5892{
5893 struct nfs4_reclaim_complete_data *calldata = data;
5894
5895 kfree(calldata);
5896}
5897
5898static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5899 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5900 .rpc_call_done = nfs4_reclaim_complete_done,
5901 .rpc_release = nfs4_free_reclaim_complete_data,
5902};
5903
5904/*
5905 * Issue a global reclaim complete.
5906 */
5907static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5908{
5909 struct nfs4_reclaim_complete_data *calldata;
5910 struct rpc_task *task;
5911 struct rpc_message msg = {
5912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5913 };
5914 struct rpc_task_setup task_setup_data = {
5915 .rpc_client = clp->cl_rpcclient,
5916 .rpc_message = &msg,
5917 .callback_ops = &nfs4_reclaim_complete_call_ops,
5918 .flags = RPC_TASK_ASYNC,
5919 };
5920 int status = -ENOMEM;
5921
5922 dprintk("--> %s\n", __func__);
8535b2be 5923 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5924 if (calldata == NULL)
5925 goto out;
5926 calldata->clp = clp;
5927 calldata->arg.one_fs = 0;
fce5c838 5928
9d12b216 5929 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5930 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5931 msg.rpc_argp = &calldata->arg;
5932 msg.rpc_resp = &calldata->res;
5933 task_setup_data.callback_data = calldata;
5934 task = rpc_run_task(&task_setup_data);
acf82b85 5935 if (IS_ERR(task)) {
fce5c838 5936 status = PTR_ERR(task);
acf82b85
DC		 5937 goto out;
5938 }
c34c32ea
AA		 5939 status = nfs4_wait_for_completion_rpc_task(task);
5940 if (status == 0)
5941 status = task->tk_status;
fce5c838 5942 rpc_put_task(task);
acf82b85 5943 return 0;
fce5c838
RL		 5944out:
5945 dprintk("<-- %s status=%d\n", __func__, status);
5946 return status;
5947}
b1f69b75
AA		 5948
5949static void
5950nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5951{
5952 struct nfs4_layoutget *lgp = calldata;
c31663d4 5953 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 5954 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 5955
5956 dprintk("--> %s\n", __func__);
c31663d4
FI		 5957 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5958 * right now covering the LAYOUTGET we are about to send.
5959 * However, that is not so catastrophic, and there seems
5960 * to be no way to prevent it completely.
5961 */
6ba7db34 5962 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 5963 &lgp->res.seq_res, task))
b1f69b75 5964 return;
cf7d63f1
FI		 5965 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5966 NFS_I(lgp->args.inode)->layout,
5967 lgp->args.ctx->state)) {
5968 rpc_exit(task, NFS4_OK);
cf7d63f1 5969 }
b1f69b75
AA		 5970}
5971
5972static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5973{
5974 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 5975 struct inode *inode = lgp->args.inode;
5976 struct nfs_server *server = NFS_SERVER(inode);
5977 struct pnfs_layout_hdr *lo;
5978 struct nfs4_state *state = NULL;
b1f69b75
AA		 5979
5980 dprintk("--> %s\n", __func__);
5981
6ba7db34 5982 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 5983 goto out;
b1f69b75
AA		 5984
5985 switch (task->tk_status) {
5986 case 0:
ee314c2a 5987 goto out;
b1f69b75
AA		 5988 case -NFS4ERR_LAYOUTTRYLATER:
5989 case -NFS4ERR_RECALLCONFLICT:
5990 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 5991 break;
5992 case -NFS4ERR_EXPIRED:
5993 case -NFS4ERR_BAD_STATEID:
5994 spin_lock(&inode->i_lock);
5995 lo = NFS_I(inode)->layout;
5996 if (!lo || list_empty(&lo->plh_segs)) {
5997 spin_unlock(&inode->i_lock);
5998 /* If the open stateid was bad, then recover it. */
5999 state = lgp->args.ctx->state;
6000 } else {
6001 LIST_HEAD(head);
6002
6003 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6004 spin_unlock(&inode->i_lock);
6005 /* Mark the bad layout state as invalid, then
6006 * retry using the open stateid. */
6007 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6008 }
6009 }
ee314c2a
TM		 6010 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6011 rpc_restart_call_prepare(task);
6012out:
b1f69b75
AA		 6013 dprintk("<-- %s\n", __func__);
6014}
6015
8554116e
IK		 6016static size_t max_response_pages(struct nfs_server *server)
6017{
6018 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6019 return nfs_page_array_len(0, max_resp_sz);
6020}
6021
6022static void nfs4_free_pages(struct page **pages, size_t size)
6023{
6024 int i;
6025
6026 if (!pages)
6027 return;
6028
6029 for (i = 0; i < size; i++) {
6030 if (!pages[i])
6031 break;
6032 __free_page(pages[i]);
6033 }
6034 kfree(pages);
6035}
6036
6037static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6038{
6039 struct page **pages;
6040 int i;
6041
6042 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6043 if (!pages) {
6044 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6045 return NULL;
6046 }
6047
6048 for (i = 0; i < size; i++) {
6049 pages[i] = alloc_page(gfp_flags);
6050 if (!pages[i]) {
6051 dprintk("%s: failed to allocate page\n", __func__);
6052 nfs4_free_pages(pages, size);
6053 return NULL;
6054 }
6055 }
6056
6057 return pages;
6058}
6059
b1f69b75
AA		 6060static void nfs4_layoutget_release(void *calldata)
6061{
6062 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6063 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6064 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6065
6066 dprintk("--> %s\n", __func__);
8554116e 6067 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6068 put_nfs_open_context(lgp->args.ctx);
6069 kfree(calldata);
6070 dprintk("<-- %s\n", __func__);
6071}
6072
6073static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6074 .rpc_call_prepare = nfs4_layoutget_prepare,
6075 .rpc_call_done = nfs4_layoutget_done,
6076 .rpc_release = nfs4_layoutget_release,
6077};
6078
a0b0a6e3
TM		 6079struct pnfs_layout_segment *
6080nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6081{
6082 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6083 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6084 struct rpc_task *task;
6085 struct rpc_message msg = {
6086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6087 .rpc_argp = &lgp->args,
6088 .rpc_resp = &lgp->res,
6089 };
6090 struct rpc_task_setup task_setup_data = {
6091 .rpc_client = server->client,
6092 .rpc_message = &msg,
6093 .callback_ops = &nfs4_layoutget_call_ops,
6094 .callback_data = lgp,
6095 .flags = RPC_TASK_ASYNC,
6096 };
a0b0a6e3 6097 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6098 int status = 0;
6099
6100 dprintk("--> %s\n", __func__);
6101
8554116e
IK		 6102 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6103 if (!lgp->args.layout.pages) {
6104 nfs4_layoutget_release(lgp);
a0b0a6e3 6105 return ERR_PTR(-ENOMEM);
8554116e
IK		 6106 }
6107 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6108
35124a09 6109 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6110 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6111 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6112 task = rpc_run_task(&task_setup_data);
6113 if (IS_ERR(task))
a0b0a6e3 6114 return ERR_CAST(task);
b1f69b75 6115 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6116 if (status == 0)
6117 status = task->tk_status;
6118 if (status == 0)
a0b0a6e3 6119 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6120 rpc_put_task(task);
6121 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6122 if (status)
6123 return ERR_PTR(status);
6124 return lseg;
b1f69b75
AA		 6125}
6126
cbe82603
BH		 6127static void
6128nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6129{
6130 struct nfs4_layoutreturn *lrp = calldata;
6131
6132 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6133 nfs41_setup_sequence(lrp->clp->cl_session,
6134 &lrp->args.seq_args,
6135 &lrp->res.seq_res,
6136 task);
cbe82603
BH		 6137}
6138
6139static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6140{
6141 struct nfs4_layoutreturn *lrp = calldata;
6142 struct nfs_server *server;
6143
6144 dprintk("--> %s\n", __func__);
6145
6ba7db34 6146 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6147 return;
6148
6149 server = NFS_SERVER(lrp->args.inode);
6150 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6151 rpc_restart_call_prepare(task);
cbe82603
BH		 6152 return;
6153 }
cbe82603
BH		 6154 dprintk("<-- %s\n", __func__);
6155}
6156
6157static void nfs4_layoutreturn_release(void *calldata)
6158{
6159 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6160 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6161
6162 dprintk("--> %s\n", __func__);
849b286f
TM		 6163 spin_lock(&lo->plh_inode->i_lock);
6164 if (lrp->res.lrs_present)
6165 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6166 lo->plh_block_lgets--;
6167 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6168 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6169 kfree(calldata);
6170 dprintk("<-- %s\n", __func__);
6171}
6172
6173static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6174 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6175 .rpc_call_done = nfs4_layoutreturn_done,
6176 .rpc_release = nfs4_layoutreturn_release,
6177};
6178
6179int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6180{
6181 struct rpc_task *task;
6182 struct rpc_message msg = {
6183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6184 .rpc_argp = &lrp->args,
6185 .rpc_resp = &lrp->res,
6186 };
6187 struct rpc_task_setup task_setup_data = {
6188 .rpc_client = lrp->clp->cl_rpcclient,
6189 .rpc_message = &msg,
6190 .callback_ops = &nfs4_layoutreturn_call_ops,
6191 .callback_data = lrp,
6192 };
6193 int status;
6194
6195 dprintk("--> %s\n", __func__);
9d12b216 6196 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6197 task = rpc_run_task(&task_setup_data);
6198 if (IS_ERR(task))
6199 return PTR_ERR(task);
6200 status = task->tk_status;
6201 dprintk("<-- %s status=%d\n", __func__, status);
6202 rpc_put_task(task);
6203 return status;
6204}
6205
7f11d8d3
AA		 6206/*
6207 * Retrieve the list of Data Server devices from the MDS.
6208 */
6209static int _nfs4_getdevicelist(struct nfs_server *server,
6210 const struct nfs_fh *fh,
6211 struct pnfs_devicelist *devlist)
6212{
6213 struct nfs4_getdevicelist_args args = {
6214 .fh = fh,
6215 .layoutclass = server->pnfs_curr_ld->id,
6216 };
6217 struct nfs4_getdevicelist_res res = {
6218 .devlist = devlist,
6219 };
6220 struct rpc_message msg = {
6221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6222 .rpc_argp = &args,
6223 .rpc_resp = &res,
6224 };
6225 int status;
6226
6227 dprintk("--> %s\n", __func__);
6228 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6229 &res.seq_res, 0);
6230 dprintk("<-- %s status=%d\n", __func__, status);
6231 return status;
6232}
6233
6234int nfs4_proc_getdevicelist(struct nfs_server *server,
6235 const struct nfs_fh *fh,
6236 struct pnfs_devicelist *devlist)
6237{
6238 struct nfs4_exception exception = { };
6239 int err;
6240
6241 do {
6242 err = nfs4_handle_exception(server,
6243 _nfs4_getdevicelist(server, fh, devlist),
6244 &exception);
6245 } while (exception.retry);
6246
6247 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6248 err, devlist->num_devs);
6249
6250 return err;
6251}
6252EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6253
b1f69b75
AA		 6254static int
6255_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6256{
6257 struct nfs4_getdeviceinfo_args args = {
6258 .pdev = pdev,
6259 };
6260 struct nfs4_getdeviceinfo_res res = {
6261 .pdev = pdev,
6262 };
6263 struct rpc_message msg = {
6264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6265 .rpc_argp = &args,
6266 .rpc_resp = &res,
6267 };
6268 int status;
6269
6270 dprintk("--> %s\n", __func__);
7c513058 6271 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6272 dprintk("<-- %s status=%d\n", __func__, status);
6273
6274 return status;
6275}
6276
6277int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6278{
6279 struct nfs4_exception exception = { };
6280 int err;
6281
6282 do {
6283 err = nfs4_handle_exception(server,
6284 _nfs4_proc_getdeviceinfo(server, pdev),
6285 &exception);
6286 } while (exception.retry);
6287 return err;
6288}
6289EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6290
863a3c6c
AA		 6291static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6292{
6293 struct nfs4_layoutcommit_data *data = calldata;
6294 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6295 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6296
d9afbd1b
TM		 6297 nfs41_setup_sequence(session,
6298 &data->args.seq_args,
6299 &data->res.seq_res,
6300 task);
863a3c6c
AA		 6301}
6302
6303static void
6304nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6305{
6306 struct nfs4_layoutcommit_data *data = calldata;
6307 struct nfs_server *server = NFS_SERVER(data->args.inode);
6308
6ba7db34 6309 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6310 return;
6311
6312 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6313 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6314 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6315 case -NFS4ERR_BADLAYOUT: /* no layout */
6316 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6317 task->tk_status = 0;
e59d27e0
TM		 6318 break;
6319 case 0:
863a3c6c
AA		 6320 nfs_post_op_update_inode_force_wcc(data->args.inode,
6321 data->res.fattr);
e59d27e0
TM		 6322 break;
6323 default:
6324 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6325 rpc_restart_call_prepare(task);
6326 return;
6327 }
6328 }
863a3c6c
AA		 6329}
6330
6331static void nfs4_layoutcommit_release(void *calldata)
6332{
6333 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6334 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6335 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6336
db29c089 6337 pnfs_cleanup_layoutcommit(data);
863a3c6c 6338 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6339 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6340 list_del_init(&lseg->pls_lc_list);
6341 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6342 &lseg->pls_flags))
9369a431 6343 pnfs_put_lseg(lseg);
a9bae566 6344 }
92407e75
PT		 6345
6346 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6347 smp_mb__after_clear_bit();
6348 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6349
863a3c6c
AA		 6350 put_rpccred(data->cred);
6351 kfree(data);
6352}
6353
6354static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6355 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6356 .rpc_call_done = nfs4_layoutcommit_done,
6357 .rpc_release = nfs4_layoutcommit_release,
6358};
6359
6360int
ef311537 6361nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6362{
6363 struct rpc_message msg = {
6364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6365 .rpc_argp = &data->args,
6366 .rpc_resp = &data->res,
6367 .rpc_cred = data->cred,
6368 };
6369 struct rpc_task_setup task_setup_data = {
6370 .task = &data->task,
6371 .rpc_client = NFS_CLIENT(data->args.inode),
6372 .rpc_message = &msg,
6373 .callback_ops = &nfs4_layoutcommit_ops,
6374 .callback_data = data,
6375 .flags = RPC_TASK_ASYNC,
6376 };
6377 struct rpc_task *task;
6378 int status = 0;
6379
6380 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6381 "lbw: %llu inode %lu\n",
6382 data->task.tk_pid, sync,
6383 data->args.lastbytewritten,
6384 data->args.inode->i_ino);
6385
9d12b216 6386 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6387 task = rpc_run_task(&task_setup_data);
6388 if (IS_ERR(task))
6389 return PTR_ERR(task);
ef311537 6390 if (sync == false)
863a3c6c
AA		 6391 goto out;
6392 status = nfs4_wait_for_completion_rpc_task(task);
6393 if (status != 0)
6394 goto out;
6395 status = task->tk_status;
6396out:
6397 dprintk("%s: status %d\n", __func__, status);
6398 rpc_put_task(task);
6399 return status;
6400}
fca78d6d
BS		 6401
6402static int
6403_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6404 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6405{
6406 struct nfs41_secinfo_no_name_args args = {
6407 .style = SECINFO_STYLE_CURRENT_FH,
6408 };
6409 struct nfs4_secinfo_res res = {
6410 .flavors = flavors,
6411 };
6412 struct rpc_message msg = {
6413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6414 .rpc_argp = &args,
6415 .rpc_resp = &res,
6416 };
6417 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6418}
6419
6420static int
6421nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6422 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6423{
6424 struct nfs4_exception exception = { };
6425 int err;
6426 do {
6427 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6428 switch (err) {
6429 case 0:
6430 case -NFS4ERR_WRONGSEC:
6431 case -NFS4ERR_NOTSUPP:
05e9cfb4 6432 goto out;
fca78d6d
BS		 6433 default:
6434 err = nfs4_handle_exception(server, err, &exception);
6435 }
6436 } while (exception.retry);
05e9cfb4 6437out:
fca78d6d
BS		 6438 return err;
6439}
6440
6441static int
6442nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6443 struct nfs_fsinfo *info)
6444{
6445 int err;
6446 struct page *page;
6447 rpc_authflavor_t flavor;
6448 struct nfs4_secinfo_flavors *flavors;
6449
6450 page = alloc_page(GFP_KERNEL);
6451 if (!page) {
6452 err = -ENOMEM;
6453 goto out;
6454 }
6455
6456 flavors = page_address(page);
6457 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6458
6459 /*
6460 * Fall back on "guess and check" method if
6461 * the server doesn't support SECINFO_NO_NAME
6462 */
6463 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6464 err = nfs4_find_root_sec(server, fhandle, info);
6465 goto out_freepage;
6466 }
6467 if (err)
6468 goto out_freepage;
6469
6470 flavor = nfs_find_best_sec(flavors);
6471 if (err == 0)
6472 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6473
6474out_freepage:
6475 put_page(page);
6476 if (err == -EACCES)
6477 return -EPERM;
6478out:
6479 return err;
6480}
1cab0652
BS		 6481
6482static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6483{
6484 int status;
6485 struct nfs41_test_stateid_args args = {
1cab0652 6486 .stateid = stateid,
7d974794
BS		 6487 };
6488 struct nfs41_test_stateid_res res;
6489 struct rpc_message msg = {
6490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6491 .rpc_argp = &args,
6492 .rpc_resp = &res,
6493 };
1cab0652 6494
38527b15 6495 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6496 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6497 nfs4_set_sequence_privileged(&args.seq_args);
6498 status = nfs4_call_sync_sequence(server->client, server, &msg,
6499 &args.seq_args, &res.seq_res);
38527b15
CL		 6500 if (status != NFS_OK) {
6501 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6502 return status;
38527b15
CL		 6503 }
6504 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6505 return -res.status;
7d974794
BS		 6506}
6507
38527b15
CL		 6508/**
6509 * nfs41_test_stateid - perform a TEST_STATEID operation
6510 *
6511 * @server: server / transport on which to perform the operation
6512 * @stateid: state ID to test
6513 *
6514 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6515 * Otherwise a negative NFS4ERR value is returned if the operation
6516 * failed or the state ID is not currently valid.
6517 */
1cab0652 6518static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6519{
6520 struct nfs4_exception exception = { };
6521 int err;
6522 do {
377e507d
CL		 6523 err = _nfs41_test_stateid(server, stateid);
6524 if (err != -NFS4ERR_DELAY)
6525 break;
6526 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6527 } while (exception.retry);
6528 return err;
6529}
9aeda35f 6530
1cab0652 6531static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6532{
9aeda35f 6533 struct nfs41_free_stateid_args args = {
1cab0652 6534 .stateid = stateid,
9aeda35f
BS		 6535 };
6536 struct nfs41_free_stateid_res res;
6537 struct rpc_message msg = {
6538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6539 .rpc_argp = &args,
6540 .rpc_resp = &res,
6541 };
38527b15 6542 int status;
9aeda35f 6543
38527b15 6544 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6545 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6546 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6547 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6548 &args.seq_args, &res.seq_res);
38527b15
CL		 6549 dprintk("NFS reply free_stateid: %d\n", status);
6550 return status;
9aeda35f
BS		 6551}
6552
38527b15
CL		 6553/**
6554 * nfs41_free_stateid - perform a FREE_STATEID operation
6555 *
6556 * @server: server / transport on which to perform the operation
6557 * @stateid: state ID to release
6558 *
6559 * Returns NFS_OK if the server freed "stateid". Otherwise a
6560 * negative NFS4ERR value is returned.
6561 */
1cab0652 6562static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6563{
6564 struct nfs4_exception exception = { };
6565 int err;
6566 do {
377e507d
CL		 6567 err = _nfs4_free_stateid(server, stateid);
6568 if (err != -NFS4ERR_DELAY)
6569 break;
6570 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6571 } while (exception.retry);
6572 return err;
6573}
36281caa
TM		 6574
6575static bool nfs41_match_stateid(const nfs4_stateid *s1,
6576 const nfs4_stateid *s2)
6577{
2d2f24ad 6578 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6579 return false;
6580
2d2f24ad 6581 if (s1->seqid == s2->seqid)
36281caa 6582 return true;
2d2f24ad 6583 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6584 return true;
6585
6586 return false;
6587}
6588
557134a3
AA		 6589#endif /* CONFIG_NFS_V4_1 */
6590
36281caa
TM		 6591static bool nfs4_match_stateid(const nfs4_stateid *s1,
6592 const nfs4_stateid *s2)
6593{
f597c537 6594 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6595}
6596
6597
17280175 6598static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6599 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6600 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6601 .recover_open = nfs4_open_reclaim,
6602 .recover_lock = nfs4_lock_reclaim,
591d71cb 6603 .establish_clid = nfs4_init_clientid,
90a16617 6604 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6605 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6606};
6607
591d71cb 6608#if defined(CONFIG_NFS_V4_1)
17280175 6609static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6610 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6611 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6612 .recover_open = nfs4_open_reclaim,
6613 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6614 .establish_clid = nfs41_init_clientid,
b4b82607 6615 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6616 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6617 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6618};
6619#endif /* CONFIG_NFS_V4_1 */
6620
17280175 6621static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6622 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6623 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6624 .recover_open = nfs4_open_expired,
6625 .recover_lock = nfs4_lock_expired,
6626 .establish_clid = nfs4_init_clientid,
90a16617 6627 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6628};
6629
6630#if defined(CONFIG_NFS_V4_1)
17280175 6631static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6632 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6633 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6634 .recover_open = nfs41_open_expired,
6635 .recover_lock = nfs41_lock_expired,
4d643d1d 6636 .establish_clid = nfs41_init_clientid,
b4b82607 6637 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6638};
591d71cb 6639#endif /* CONFIG_NFS_V4_1 */
1da177e4 6640
17280175 6641static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6642 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6643 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6644 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6645};
6646
6647#if defined(CONFIG_NFS_V4_1)
17280175 6648static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6649 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6650 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6651 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6652};
6653#endif
6654
97dc1359
TM		 6655static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6656 .minor_version = 0,
6657 .call_sync = _nfs4_call_sync,
36281caa 6658 .match_stateid = nfs4_match_stateid,
fca78d6d 6659 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6660 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6661 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6662 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6663};
6664
6665#if defined(CONFIG_NFS_V4_1)
6666static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6667 .minor_version = 1,
104287cd 6668 .call_sync = nfs4_call_sync_sequence,
36281caa 6669 .match_stateid = nfs41_match_stateid,
fca78d6d 6670 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6671 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6672 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6673 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6674};
6675#endif
6676
97dc1359
TM		 6677const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6678 [0] = &nfs_v4_0_minor_ops,
6679#if defined(CONFIG_NFS_V4_1)
6680 [1] = &nfs_v4_1_minor_ops,
6681#endif
6682};
6683
73a79706
BS		 6684const struct inode_operations nfs4_dir_inode_operations = {
6685 .create = nfs_create,
6686 .lookup = nfs_lookup,
6687 .atomic_open = nfs_atomic_open,
6688 .link = nfs_link,
6689 .unlink = nfs_unlink,
6690 .symlink = nfs_symlink,
6691 .mkdir = nfs_mkdir,
6692 .rmdir = nfs_rmdir,
6693 .mknod = nfs_mknod,
6694 .rename = nfs_rename,
6695 .permission = nfs_permission,
6696 .getattr = nfs_getattr,
6697 .setattr = nfs_setattr,
6698 .getxattr = generic_getxattr,
6699 .setxattr = generic_setxattr,
6700 .listxattr = generic_listxattr,
6701 .removexattr = generic_removexattr,
6702};
6703
92e1d5be 6704static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6705 .permission = nfs_permission,
6706 .getattr = nfs_getattr,
6707 .setattr = nfs_setattr,
64c2ce8b
AK		 6708 .getxattr = generic_getxattr,
6709 .setxattr = generic_setxattr,
6710 .listxattr = generic_listxattr,
6711 .removexattr = generic_removexattr,
6b3b5496
BF		 6712};
6713
509de811 6714const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6715 .version = 4, /* protocol version */
6716 .dentry_ops = &nfs4_dentry_operations,
6717 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6718 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6719 .file_ops = &nfs4_file_operations,
1da177e4 6720 .getroot = nfs4_proc_get_root,
281cad46 6721 .submount = nfs4_submount,
ff9099f2 6722 .try_mount = nfs4_try_mount,
1da177e4
LT		 6723 .getattr = nfs4_proc_getattr,
6724 .setattr = nfs4_proc_setattr,
6725 .lookup = nfs4_proc_lookup,
6726 .access = nfs4_proc_access,
6727 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6728 .create = nfs4_proc_create,
6729 .remove = nfs4_proc_remove,
6730 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6731 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6732 .unlink_done = nfs4_proc_unlink_done,
6733 .rename = nfs4_proc_rename,
d3d4152a 6734 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6735 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6736 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6737 .link = nfs4_proc_link,
6738 .symlink = nfs4_proc_symlink,
6739 .mkdir = nfs4_proc_mkdir,
6740 .rmdir = nfs4_proc_remove,
6741 .readdir = nfs4_proc_readdir,
6742 .mknod = nfs4_proc_mknod,
6743 .statfs = nfs4_proc_statfs,
6744 .fsinfo = nfs4_proc_fsinfo,
6745 .pathconf = nfs4_proc_pathconf,
e9326dca 6746 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6747 .decode_dirent = nfs4_decode_dirent,
6748 .read_setup = nfs4_proc_read_setup,
1abb5088 6749 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6750 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6751 .read_done = nfs4_read_done,
1da177e4 6752 .write_setup = nfs4_proc_write_setup,
57208fa7 6753 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6754 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6755 .write_done = nfs4_write_done,
1da177e4 6756 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6757 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6758 .commit_done = nfs4_commit_done,
1da177e4 6759 .lock = nfs4_proc_lock,
e50a1c2e 6760 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6761 .close_context = nfs4_close_context,
2b484297 6762 .open_context = nfs4_atomic_open,
011e2a7f 6763 .have_delegation = nfs4_have_delegation,
57ec14c5 6764 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6765 .alloc_client = nfs4_alloc_client,
45a52a02 6766 .init_client = nfs4_init_client,
cdb7eced 6767 .free_client = nfs4_free_client,
1179acc6
BS		 6768 .create_server = nfs4_create_server,
6769 .clone_server = nfs_clone_server,
1da177e4
LT		 6770};
6771
64c2ce8b
AK		 6772static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6773 .prefix = XATTR_NAME_NFSV4_ACL,
6774 .list = nfs4_xattr_list_nfs4_acl,
6775 .get = nfs4_xattr_get_nfs4_acl,
6776 .set = nfs4_xattr_set_nfs4_acl,
6777};
6778
6779const struct xattr_handler *nfs4_xattr_handlers[] = {
6780 &nfs4_xattr_nfs4_acl_handler,
6781 NULL
6782};
6783
1da177e4
LT		 6784/*
6785 * Local variables:
6786 * c-basic-offset: 8
6787 * End:
6788 */
Linux 6.x block layer and io_uring tree(s)