projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1: Deal with wraparound when updating the layout "barrier" seqid
[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>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
6168f62c
WAA		 107 case -NFS4ERR_ACCESS:
108 return -EACCES;
52567b03 109 default:
1da177e4 110 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 111 __func__, -err);
52567b03 112 break;
1da177e4 113 }
52567b03 114 return -EIO;
1da177e4
LT		 115}
116
117/*
118 * This is our standard bitmap for GETATTR requests.
119 */
1549210f 120const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 121 FATTR4_WORD0_TYPE
122 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_SIZE
124 | FATTR4_WORD0_FSID
125 | FATTR4_WORD0_FILEID,
126 FATTR4_WORD1_MODE
127 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
135};
136
1549210f
TM		 137static const u32 nfs4_pnfs_open_bitmap[3] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID,
143 FATTR4_WORD1_MODE
144 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
153};
154
1da177e4
LT		 155const u32 nfs4_statfs_bitmap[2] = {
156 FATTR4_WORD0_FILES_AVAIL
157 | FATTR4_WORD0_FILES_FREE
158 | FATTR4_WORD0_FILES_TOTAL,
159 FATTR4_WORD1_SPACE_AVAIL
160 | FATTR4_WORD1_SPACE_FREE
161 | FATTR4_WORD1_SPACE_TOTAL
162};
163
4ce79717 164const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 165 FATTR4_WORD0_MAXLINK
166 | FATTR4_WORD0_MAXNAME,
167 0
168};
169
dae100c2 170const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 171 | FATTR4_WORD0_MAXREAD
172 | FATTR4_WORD0_MAXWRITE
173 | FATTR4_WORD0_LEASE_TIME,
55b6e774 174 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 175 | FATTR4_WORD1_FS_LAYOUT_TYPES,
176 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 177};
178
830b8e33
MN		 179const u32 nfs4_fs_locations_bitmap[2] = {
180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID
185 | FATTR4_WORD0_FS_LOCATIONS,
186 FATTR4_WORD1_MODE
187 | FATTR4_WORD1_NUMLINKS
188 | FATTR4_WORD1_OWNER
189 | FATTR4_WORD1_OWNER_GROUP
190 | FATTR4_WORD1_RAWDEV
191 | FATTR4_WORD1_SPACE_USED
192 | FATTR4_WORD1_TIME_ACCESS
193 | FATTR4_WORD1_TIME_METADATA
194 | FATTR4_WORD1_TIME_MODIFY
195 | FATTR4_WORD1_MOUNTED_ON_FILEID
196};
197
bc4785cd 198static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 199 struct nfs4_readdir_arg *readdir)
200{
0dbb4c67 201 __be32 *start, *p;
1da177e4
LT		 202
203 BUG_ON(readdir->count < 80);
204 if (cookie > 2) {
b7ef1956 205 readdir->cookie = cookie;
1da177e4
LT		 206 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
207 return;
208 }
209
210 readdir->cookie = 0;
211 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
212 if (cookie == 2)
213 return;
214
215 /*
216 * NFSv4 servers do not return entries for '.' and '..'
217 * Therefore, we fake these entries here. We let '.'
218 * have cookie 0 and '..' have cookie 1. Note that
219 * when talking to the server, we always send cookie 0
220 * instead of 1 or 2.
221 */
2b86ce2d 222 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 223
224 if (cookie == 0) {
225 *p++ = xdr_one; /* next */
226 *p++ = xdr_zero; /* cookie, first word */
227 *p++ = xdr_one; /* cookie, second word */
228 *p++ = xdr_one; /* entry len */
229 memcpy(p, ".\0\0\0", 4); /* entry */
230 p++;
231 *p++ = xdr_one; /* bitmap length */
232 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
233 *p++ = htonl(8); /* attribute buffer length */
4e769b93 234 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 235 }
236
237 *p++ = xdr_one; /* next */
238 *p++ = xdr_zero; /* cookie, first word */
239 *p++ = xdr_two; /* cookie, second word */
240 *p++ = xdr_two; /* entry len */
241 memcpy(p, "..\0\0", 4); /* entry */
242 p++;
243 *p++ = xdr_one; /* bitmap length */
244 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
245 *p++ = htonl(8); /* attribute buffer length */
4e769b93 246 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 247
248 readdir->pgbase = (char *)p - (char *)start;
249 readdir->count -= readdir->pgbase;
2b86ce2d 250 kunmap_atomic(start);
1da177e4
LT		 251}
252
65de872e
TM		 253static int nfs4_wait_clnt_recover(struct nfs_client *clp)
254{
255 int res;
256
257 might_sleep();
258
e005e804 259 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 260 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 261 if (res)
262 return res;
263
264 if (clp->cl_cons_state < 0)
265 return clp->cl_cons_state;
266 return 0;
65de872e
TM		 267}
268
269static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
270{
271 int res = 0;
272
273 might_sleep();
274
275 if (*timeout <= 0)
276 *timeout = NFS4_POLL_RETRY_MIN;
277 if (*timeout > NFS4_POLL_RETRY_MAX)
278 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 279 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 280 if (fatal_signal_pending(current))
281 res = -ERESTARTSYS;
282 *timeout <<= 1;
283 return res;
284}
285
286/* This is the error handling routine for processes that are allowed
287 * to sleep.
288 */
b064eca2 289static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 290{
291 struct nfs_client *clp = server->nfs_client;
9e33bed5 292 struct nfs4_state *state = exception->state;
3114ea7a 293 struct inode *inode = exception->inode;
65de872e
TM		 294 int ret = errorcode;
295
296 exception->retry = 0;
297 switch(errorcode) {
298 case 0:
299 return 0;
3114ea7a 300 case -NFS4ERR_OPENMODE:
011e2a7f 301 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 302 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 303 exception->retry = 1;
304 return 0;
305 }
306 if (state == NULL)
307 break;
308 nfs4_schedule_stateid_recovery(server, state);
309 goto wait_on_recovery;
a1d0b5ee 310 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 311 case -NFS4ERR_ADMIN_REVOKED:
312 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 313 if (state == NULL)
314 break;
14977489 315 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 316 nfs4_schedule_stateid_recovery(server, state);
317 goto wait_on_recovery;
0ced63d1
TM		 318 case -NFS4ERR_EXPIRED:
319 if (state != NULL)
320 nfs4_schedule_stateid_recovery(server, state);
65de872e 321 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 322 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 323 nfs4_schedule_lease_recovery(clp);
324 goto wait_on_recovery;
03391693 325#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 326 case -NFS4ERR_BADSESSION:
327 case -NFS4ERR_BADSLOT:
328 case -NFS4ERR_BAD_HIGH_SLOT:
329 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
330 case -NFS4ERR_DEADSESSION:
331 case -NFS4ERR_SEQ_FALSE_RETRY:
332 case -NFS4ERR_SEQ_MISORDERED:
333 dprintk("%s ERROR: %d Reset session\n", __func__,
334 errorcode);
9f594791 335 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 336 exception->retry = 1;
b9179237 337 break;
03391693 338#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 339 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 340 if (exception->timeout > HZ) {
341 /* We have retried a decent amount, time to
342 * fail
343 */
344 ret = -EBUSY;
345 break;
346 }
65de872e
TM		 347 case -NFS4ERR_GRACE:
348 case -NFS4ERR_DELAY:
2c643488 349 case -EKEYEXPIRED:
65de872e
TM		 350 ret = nfs4_delay(server->client, &exception->timeout);
351 if (ret != 0)
352 break;
a8a4ae3a 353 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 354 case -NFS4ERR_OLD_STATEID:
355 exception->retry = 1;
b064eca2
TM		 356 break;
357 case -NFS4ERR_BADOWNER:
358 /* The following works around a Linux server bug! */
359 case -NFS4ERR_BADNAME:
360 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
361 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
362 exception->retry = 1;
363 printk(KERN_WARNING "NFS: v4 server %s "
364 "does not accept raw "
365 "uid/gids. "
366 "Reenabling the idmapper.\n",
367 server->nfs_client->cl_hostname);
368 }
65de872e
TM		 369 }
370 /* We failed to handle the error */
371 return nfs4_map_errors(ret);
0400a6b0 372wait_on_recovery:
a2c0b9e2
TM		 373 ret = nfs4_wait_clnt_recover(clp);
374 if (ret == 0)
375 exception->retry = 1;
376 return ret;
65de872e
TM		 377}
378
379
452e9352 380static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 381{
1da177e4
LT		 382 spin_lock(&clp->cl_lock);
383 if (time_before(clp->cl_last_renewal,timestamp))
384 clp->cl_last_renewal = timestamp;
385 spin_unlock(&clp->cl_lock);
386}
387
452e9352
TM		 388static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
389{
390 do_renew_lease(server->nfs_client, timestamp);
391}
392
cccef3b9
AA		 393#if defined(CONFIG_NFS_V4_1)
394
e2c4ab3c
AA		 395/*
396 * nfs4_free_slot - free a slot and efficiently update slot table.
397 *
398 * freeing a slot is trivially done by clearing its respective bit
399 * in the bitmap.
400 * If the freed slotid equals highest_used_slotid we want to update it
401 * so that the server would be able to size down the slot table if needed,
402 * otherwise we know that the highest_used_slotid is still in use.
403 * When updating highest_used_slotid there may be "holes" in the bitmap
404 * so we need to scan down from highest_used_slotid to 0 looking for the now
405 * highest slotid in use.
45d43c29 406 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 407 *
408 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 409 */
410static void
45d43c29 411nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 412{
45d43c29 413 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 414 /* clear used bit in bitmap */
415 __clear_bit(slotid, tbl->used_slots);
416
417 /* update highest_used_slotid when it is freed */
418 if (slotid == tbl->highest_used_slotid) {
419 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 420 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 421 tbl->highest_used_slotid = slotid;
422 else
45d43c29 423 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 424 }
45d43c29
TM		 425 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
426 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 427}
428
961a828d
TM		 429bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
430{
431 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
432 return true;
e2c4ab3c
AA		 433}
434
3bfb0fc5 435/*
42acd021 436 * Signal state manager thread if session fore channel is drained
3bfb0fc5 437 */
42acd021 438static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 439{
a2118c33 440 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 441 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
442 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 443 return;
444 }
445
45d43c29 446 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 447 return;
448
42acd021
AA		 449 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
450 complete(&ses->fc_slot_table.complete);
451}
452
453/*
454 * Signal state manager thread if session back channel is drained
455 */
456void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
457{
458 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 459 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 460 return;
461 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
462 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 463}
464
d185a334 465static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 466{
467 struct nfs4_slot_table *tbl;
468
d185a334 469 tbl = &res->sr_session->fc_slot_table;
dfb4f309 470 if (!res->sr_slot) {
13615871
AA		 471 /* just wake up the next guy waiting since
472 * we may have not consumed a slot after all */
691daf3b 473 dprintk("%s: No slot\n", __func__);
35dc1d74 474 return;
13615871 475 }
ea028ac9 476
35dc1d74 477 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 478 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 479 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 480 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 481 res->sr_slot = NULL;
13615871
AA		 482}
483
14516c3a 484static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 485{
486 unsigned long timestamp;
14516c3a 487 struct nfs_client *clp;
b0df806c
AA		 488
489 /*
490 * sr_status remains 1 if an RPC level error occurred. The server
491 * may or may not have processed the sequence operation..
492 * Proceed as if the server received and processed the sequence
493 * operation.
494 */
495 if (res->sr_status == 1)
496 res->sr_status = NFS_OK;
497
468f8613
BS		 498 /* don't increment the sequence number if the task wasn't sent */
499 if (!RPC_WAS_SENT(task))
b0df806c
AA		 500 goto out;
501
691daf3b 502 /* Check the SEQUENCE operation status */
14516c3a
TM		 503 switch (res->sr_status) {
504 case 0:
b0df806c 505 /* Update the slot's sequence and clientid lease timer */
dfb4f309 506 ++res->sr_slot->seq_nr;
b0df806c 507 timestamp = res->sr_renewal_time;
14516c3a 508 clp = res->sr_session->clp;
452e9352 509 do_renew_lease(clp, timestamp);
0629e370 510 /* Check sequence flags */
b4410c2f
TM		 511 if (res->sr_status_flags != 0)
512 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 513 break;
514 case -NFS4ERR_DELAY:
515 /* The server detected a resend of the RPC call and
516 * returned NFS4ERR_DELAY as per Section 2.10.6.2
517 * of RFC5661.
518 */
12364a4f 519 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 520 __func__,
521 res->sr_slot - res->sr_session->fc_slot_table.slots,
522 res->sr_slot->seq_nr);
14516c3a
TM		 523 goto out_retry;
524 default:
525 /* Just update the slot sequence no. */
dfb4f309 526 ++res->sr_slot->seq_nr;
b0df806c
AA		 527 }
528out:
529 /* The session may be reset by one of the error handlers. */
530 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 531 nfs41_sequence_free_slot(res);
14516c3a
TM		 532 return 1;
533out_retry:
d05dd4e9 534 if (!rpc_restart_call(task))
14516c3a
TM		 535 goto out;
536 rpc_delay(task, NFS4_POLL_RETRY_MAX);
537 return 0;
b0df806c
AA		 538}
539
14516c3a
TM		 540static int nfs4_sequence_done(struct rpc_task *task,
541 struct nfs4_sequence_res *res)
df896455 542{
14516c3a
TM		 543 if (res->sr_session == NULL)
544 return 1;
545 return nfs41_sequence_done(task, res);
df896455
TM		 546}
547
510b8175
BH		 548/*
549 * nfs4_find_slot - efficiently look for a free slot
550 *
551 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
552 * If found, we mark the slot as used, update the highest_used_slotid,
553 * and respectively set up the sequence operation args.
45d43c29 554 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 555 *
556 * Note: must be called with under the slot_tbl_lock.
510b8175 557 */
45d43c29 558static u32
40ead580 559nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 560{
45d43c29
TM		 561 u32 slotid;
562 u32 ret_id = NFS4_NO_SLOT;
510b8175 563
45d43c29 564 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 565 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
566 tbl->max_slots);
567 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
568 if (slotid >= tbl->max_slots)
569 goto out;
570 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 571 if (slotid > tbl->highest_used_slotid ||
572 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 573 tbl->highest_used_slotid = slotid;
574 ret_id = slotid;
575out:
576 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
577 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 578 return ret_id;
579}
580
9d12b216
TM		 581static void nfs41_init_sequence(struct nfs4_sequence_args *args,
582 struct nfs4_sequence_res *res, int cache_reply)
583{
584 args->sa_session = NULL;
585 args->sa_cache_this = 0;
586 if (cache_reply)
587 args->sa_cache_this = 1;
588 res->sr_session = NULL;
589 res->sr_slot = NULL;
590}
591
dc70d7b3 592int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 593 struct nfs4_sequence_args *args,
594 struct nfs4_sequence_res *res,
ce5039c1
AA		 595 struct rpc_task *task)
596{
fbcd4abc
AA		 597 struct nfs4_slot *slot;
598 struct nfs4_slot_table *tbl;
45d43c29 599 u32 slotid;
fbcd4abc
AA		 600
601 dprintk("--> %s\n", __func__);
ce5039c1 602 /* slot already allocated? */
dfb4f309 603 if (res->sr_slot != NULL)
ce5039c1
AA		 604 return 0;
605
fbcd4abc
AA		 606 tbl = &session->fc_slot_table;
607
608 spin_lock(&tbl->slot_tbl_lock);
a2118c33 609 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 610 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 611 /* The state manager will wait until the slot table is empty */
05f0d236 612 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 613 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 614 dprintk("%s session is draining\n", __func__);
05f0d236 615 return -EAGAIN;
b069d94a
AA		 616 }
617
689cf5c1
AB		 618 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
619 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
620 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
621 spin_unlock(&tbl->slot_tbl_lock);
622 dprintk("%s enforce FIFO order\n", __func__);
623 return -EAGAIN;
624 }
625
40ead580 626 slotid = nfs4_find_slot(tbl);
45d43c29 627 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 628 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
629 spin_unlock(&tbl->slot_tbl_lock);
630 dprintk("<-- %s: no free slots\n", __func__);
631 return -EAGAIN;
632 }
633 spin_unlock(&tbl->slot_tbl_lock);
634
689cf5c1 635 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 636 slot = tbl->slots + slotid;
99fe60d0 637 args->sa_session = session;
fbcd4abc 638 args->sa_slotid = slotid;
fbcd4abc
AA		 639
640 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
641
99fe60d0 642 res->sr_session = session;
dfb4f309 643 res->sr_slot = slot;
fbcd4abc 644 res->sr_renewal_time = jiffies;
2a6e26cd 645 res->sr_status_flags = 0;
fbcd4abc
AA		 646 /*
647 * sr_status is only set in decode_sequence, and so will remain
648 * set to 1 if an rpc level failure occurs.
649 */
650 res->sr_status = 1;
ce5039c1
AA		 651 return 0;
652}
dc70d7b3 653EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 654
035168ab 655int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 656 struct nfs4_sequence_args *args,
657 struct nfs4_sequence_res *res,
ce5039c1
AA		 658 struct rpc_task *task)
659{
035168ab 660 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 661 int ret = 0;
662
9d12b216 663 if (session == NULL)
035168ab 664 goto out;
035168ab 665
12364a4f 666 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 667 __func__, session->clp, session, res->sr_slot ?
668 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 669
9d12b216 670 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 671out:
672 dprintk("<-- %s status=%d\n", __func__, ret);
673 return ret;
674}
675
676struct nfs41_call_sync_data {
035168ab 677 const struct nfs_server *seq_server;
ce5039c1
AA		 678 struct nfs4_sequence_args *seq_args;
679 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 680};
681
682static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
683{
684 struct nfs41_call_sync_data *data = calldata;
685
035168ab
TM		 686 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
687
688 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 689 data->seq_res, task))
ce5039c1
AA		 690 return;
691 rpc_call_start(task);
692}
693
b257957e
AB		 694static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
695{
696 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
697 nfs41_call_sync_prepare(task, calldata);
698}
699
69ab40c4
AA		 700static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
701{
702 struct nfs41_call_sync_data *data = calldata;
703
14516c3a 704 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 705}
706
17280175 707static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 708 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 709 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 710};
711
17280175 712static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 713 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
714 .rpc_call_done = nfs41_call_sync_done,
715};
716
7c513058
BS		 717static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
718 struct nfs_server *server,
ce5039c1
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
721 struct nfs4_sequence_res *res,
b257957e 722 int privileged)
ce5039c1
AA		 723{
724 int ret;
725 struct rpc_task *task;
726 struct nfs41_call_sync_data data = {
035168ab 727 .seq_server = server,
ce5039c1
AA		 728 .seq_args = args,
729 .seq_res = res,
ce5039c1
AA		 730 };
731 struct rpc_task_setup task_setup = {
7c513058 732 .rpc_client = clnt,
ce5039c1
AA		 733 .rpc_message = msg,
734 .callback_ops = &nfs41_call_sync_ops,
735 .callback_data = &data
736 };
737
b257957e
AB		 738 if (privileged)
739 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 740 task = rpc_run_task(&task_setup);
741 if (IS_ERR(task))
742 ret = PTR_ERR(task);
743 else {
744 ret = task->tk_status;
745 rpc_put_task(task);
746 }
747 return ret;
748}
749
7c513058
BS		 750int _nfs4_call_sync_session(struct rpc_clnt *clnt,
751 struct nfs_server *server,
cccef3b9
AA		 752 struct rpc_message *msg,
753 struct nfs4_sequence_args *args,
754 struct nfs4_sequence_res *res,
755 int cache_reply)
756{
9d12b216
TM		 757 nfs41_init_sequence(args, res, cache_reply);
758 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 759}
760
df896455 761#else
9d12b216
TM		 762static inline
763void nfs41_init_sequence(struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res, int cache_reply)
765{
766}
767
14516c3a
TM		 768static int nfs4_sequence_done(struct rpc_task *task,
769 struct nfs4_sequence_res *res)
df896455 770{
14516c3a 771 return 1;
df896455 772}
cccef3b9
AA		 773#endif /* CONFIG_NFS_V4_1 */
774
7c513058
BS		 775int _nfs4_call_sync(struct rpc_clnt *clnt,
776 struct nfs_server *server,
cccef3b9
AA		 777 struct rpc_message *msg,
778 struct nfs4_sequence_args *args,
779 struct nfs4_sequence_res *res,
780 int cache_reply)
781{
9d12b216 782 nfs41_init_sequence(args, res, cache_reply);
7c513058 783 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 784}
785
e73b83f2 786static inline
7c513058
BS		 787int nfs4_call_sync(struct rpc_clnt *clnt,
788 struct nfs_server *server,
e73b83f2
BS		 789 struct rpc_message *msg,
790 struct nfs4_sequence_args *args,
791 struct nfs4_sequence_res *res,
792 int cache_reply)
793{
7c513058
BS		 794 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
795 args, res, cache_reply);
e73b83f2 796}
cccef3b9 797
38478b24 798static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 799{
38478b24 800 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 801
38478b24 802 spin_lock(&dir->i_lock);
359d7d1c 803 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 804 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 805 nfs_force_lookup_revalidate(dir);
a9a4a87a 806 dir->i_version = cinfo->after;
38478b24 807 spin_unlock(&dir->i_lock);
1da177e4
LT		 808}
809
e56e0b78 810struct nfs4_opendata {
c6d00e63 811 struct kref kref;
e56e0b78
TM		 812 struct nfs_openargs o_arg;
813 struct nfs_openres o_res;
cdd4e68b
TM		 814 struct nfs_open_confirmargs c_arg;
815 struct nfs_open_confirmres c_res;
6926afd1
TM		 816 struct nfs4_string owner_name;
817 struct nfs4_string group_name;
e56e0b78 818 struct nfs_fattr f_attr;
e56e0b78 819 struct dentry *dir;
82a2c1b7 820 struct dentry *dentry;
e56e0b78 821 struct nfs4_state_owner *owner;
aac00a8d 822 struct nfs4_state *state;
e56e0b78 823 struct iattr attrs;
26e976a8 824 unsigned long timestamp;
3e309914 825 unsigned int rpc_done : 1;
24ac23ab
TM		 826 int rpc_status;
827 int cancelled;
e56e0b78
TM		 828};
829
2ced46c2
TM		 830
831static void nfs4_init_opendata_res(struct nfs4_opendata *p)
832{
833 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 834 p->o_res.seqid = p->o_arg.seqid;
835 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 836 p->o_res.server = p->o_arg.server;
837 nfs_fattr_init(&p->f_attr);
6926afd1 838 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 839}
840
82a2c1b7 841static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 842 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 843 const struct iattr *attrs,
844 gfp_t gfp_mask)
e56e0b78 845{
82a2c1b7 846 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 847 struct inode *dir = parent->d_inode;
848 struct nfs_server *server = NFS_SERVER(dir);
849 struct nfs4_opendata *p;
850
8535b2be 851 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 852 if (p == NULL)
853 goto err;
8535b2be 854 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 855 if (p->o_arg.seqid == NULL)
856 goto err_free;
82a2c1b7
AV		 857 nfs_sb_active(dentry->d_sb);
858 p->dentry = dget(dentry);
e56e0b78
TM		 859 p->dir = parent;
860 p->owner = sp;
861 atomic_inc(&sp->so_count);
862 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 863 p->o_arg.open_flags = flags;
864 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 865 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
866 * will return permission denied for all bits until close */
867 if (!(flags & O_EXCL)) {
868 /* ask server to check for all possible rights as results
869 * are cached */
870 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
871 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
872 p->o_res.access_request = p->o_arg.access;
873 }
7539bbab 874 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 875 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
876 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 877 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 878 p->o_arg.server = server;
879 p->o_arg.bitmask = server->attr_bitmask;
1549210f 880 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 881 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 882 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 883 __be32 verf[2];
d77d76ff 884
e56e0b78
TM		 885 p->o_arg.u.attrs = &p->attrs;
886 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 887
888 verf[0] = jiffies;
889 verf[1] = current->pid;
890 memcpy(p->o_arg.u.verifier.data, verf,
891 sizeof(p->o_arg.u.verifier.data));
e56e0b78 892 }
cdd4e68b
TM		 893 p->c_arg.fh = &p->o_res.fh;
894 p->c_arg.stateid = &p->o_res.stateid;
895 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 896 nfs4_init_opendata_res(p);
c6d00e63 897 kref_init(&p->kref);
e56e0b78
TM		 898 return p;
899err_free:
900 kfree(p);
901err:
902 dput(parent);
903 return NULL;
904}
905
c6d00e63 906static void nfs4_opendata_free(struct kref *kref)
e56e0b78 907{
c6d00e63
TM		 908 struct nfs4_opendata *p = container_of(kref,
909 struct nfs4_opendata, kref);
82a2c1b7 910 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 911
912 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 913 if (p->state != NULL)
914 nfs4_put_open_state(p->state);
c6d00e63
TM		 915 nfs4_put_state_owner(p->owner);
916 dput(p->dir);
82a2c1b7
AV		 917 dput(p->dentry);
918 nfs_sb_deactive(sb);
6926afd1 919 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 920 kfree(p);
921}
922
923static void nfs4_opendata_put(struct nfs4_opendata *p)
924{
925 if (p != NULL)
926 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 927}
928
06f814a3
TM		 929static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
930{
06f814a3
TM		 931 int ret;
932
06f814a3 933 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 934 return ret;
935}
936
dc0b027d 937static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 938{
939 int ret = 0;
dc0b027d 940
536e43d1 941 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 942 goto out;
943 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 944 case FMODE_READ:
88069f77
TM		 945 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
946 && state->n_rdonly != 0;
6ee41268
TM		 947 break;
948 case FMODE_WRITE:
88069f77
TM		 949 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
950 && state->n_wronly != 0;
6ee41268
TM		 951 break;
952 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 953 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
954 && state->n_rdwr != 0;
6ee41268 955 }
dc0b027d 956out:
6ee41268
TM		 957 return ret;
958}
959
dc0b027d 960static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 961{
652f89f6
TM		 962 if (delegation == NULL)
963 return 0;
dc0b027d 964 if ((delegation->type & fmode) != fmode)
aac00a8d 965 return 0;
15c831bf 966 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 967 return 0;
b7391f44 968 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 969 return 1;
970}
971
dc0b027d 972static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 973{
dc0b027d 974 switch (fmode) {
e7616923
TM		 975 case FMODE_WRITE:
976 state->n_wronly++;
977 break;
978 case FMODE_READ:
979 state->n_rdonly++;
980 break;
981 case FMODE_READ|FMODE_WRITE:
982 state->n_rdwr++;
983 }
dc0b027d 984 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 985}
986
dc0b027d 987static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 988{
989 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 990 nfs4_stateid_copy(&state->stateid, stateid);
991 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 992 switch (fmode) {
003707c7
TM		 993 case FMODE_READ:
994 set_bit(NFS_O_RDONLY_STATE, &state->flags);
995 break;
996 case FMODE_WRITE:
997 set_bit(NFS_O_WRONLY_STATE, &state->flags);
998 break;
999 case FMODE_READ|FMODE_WRITE:
1000 set_bit(NFS_O_RDWR_STATE, &state->flags);
1001 }
e7616923
TM		 1002}
1003
dc0b027d 1004static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1005{
8bda4e4c 1006 write_seqlock(&state->seqlock);
dc0b027d 1007 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1008 write_sequnlock(&state->seqlock);
003707c7
TM		 1009}
1010
dc0b027d 1011static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1012{
8bda4e4c
TM		 1013 /*
1014 * Protect the call to nfs4_state_set_mode_locked and
1015 * serialise the stateid update
1016 */
1017 write_seqlock(&state->seqlock);
003707c7 1018 if (deleg_stateid != NULL) {
f597c537 1019 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1020 set_bit(NFS_DELEGATED_STATE, &state->flags);
1021 }
1022 if (open_stateid != NULL)
dc0b027d 1023 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1024 write_sequnlock(&state->seqlock);
1025 spin_lock(&state->owner->so_lock);
dc0b027d 1026 update_open_stateflags(state, fmode);
ec073428 1027 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1028}
1029
dc0b027d 1030static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1031{
1032 struct nfs_inode *nfsi = NFS_I(state->inode);
1033 struct nfs_delegation *deleg_cur;
1034 int ret = 0;
1035
dc0b027d 1036 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1037
1038 rcu_read_lock();
1039 deleg_cur = rcu_dereference(nfsi->delegation);
1040 if (deleg_cur == NULL)
1041 goto no_delegation;
1042
1043 spin_lock(&deleg_cur->lock);
1044 if (nfsi->delegation != deleg_cur ||
dc0b027d 1045 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1046 goto no_delegation_unlock;
1047
1048 if (delegation == NULL)
1049 delegation = &deleg_cur->stateid;
f597c537 1050 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1051 goto no_delegation_unlock;
1052
b7391f44 1053 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1054 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1055 ret = 1;
1056no_delegation_unlock:
1057 spin_unlock(&deleg_cur->lock);
1058no_delegation:
1059 rcu_read_unlock();
1060
1061 if (!ret && open_stateid != NULL) {
dc0b027d 1062 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1063 ret = 1;
1064 }
1065
1066 return ret;
1067}
1068
1069
dc0b027d 1070static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1071{
1072 struct nfs_delegation *delegation;
1073
1074 rcu_read_lock();
1075 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1076 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1077 rcu_read_unlock();
1078 return;
1079 }
1080 rcu_read_unlock();
57ec14c5 1081 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1082}
1083
6ee41268 1084static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1085{
1086 struct nfs4_state *state = opendata->state;
1087 struct nfs_inode *nfsi = NFS_I(state->inode);
1088 struct nfs_delegation *delegation;
536e43d1 1089 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1090 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1091 nfs4_stateid stateid;
1092 int ret = -EAGAIN;
1093
aac00a8d 1094 for (;;) {
dc0b027d 1095 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1096 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1097 if (can_open_cached(state, fmode, open_mode)) {
1098 update_open_stateflags(state, fmode);
6ee41268 1099 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1100 goto out_return_state;
1101 }
1102 spin_unlock(&state->owner->so_lock);
1103 }
34310430
TM		 1104 rcu_read_lock();
1105 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1106 if (!can_open_delegated(delegation, fmode)) {
34310430 1107 rcu_read_unlock();
aac00a8d 1108 break;
34310430 1109 }
aac00a8d 1110 /* Save the delegation */
f597c537 1111 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1112 rcu_read_unlock();
af22f94a 1113 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1114 if (ret != 0)
1115 goto out;
1116 ret = -EAGAIN;
34310430
TM		 1117
1118 /* Try to update the stateid using the delegation */
dc0b027d 1119 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1120 goto out_return_state;
aac00a8d 1121 }
aac00a8d
TM		 1122out:
1123 return ERR_PTR(ret);
1124out_return_state:
1125 atomic_inc(&state->count);
1126 return state;
1127}
1128
24ac23ab
TM		 1129static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1130{
1131 struct inode *inode;
1132 struct nfs4_state *state = NULL;
003707c7 1133 struct nfs_delegation *delegation;
1b370bc2 1134 int ret;
24ac23ab 1135
aac00a8d 1136 if (!data->rpc_done) {
6ee41268 1137 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1138 goto out;
1139 }
1140
1b370bc2 1141 ret = -EAGAIN;
24ac23ab 1142 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1143 goto err;
24ac23ab 1144 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1145 ret = PTR_ERR(inode);
03f28e3a 1146 if (IS_ERR(inode))
1b370bc2
TM		 1147 goto err;
1148 ret = -ENOMEM;
24ac23ab
TM		 1149 state = nfs4_get_open_state(inode, data->owner);
1150 if (state == NULL)
1b370bc2 1151 goto err_put_inode;
549d6ed5 1152 if (data->o_res.delegation_type != 0) {
4e0038b6 1153 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1154 int delegation_flags = 0;
1155
003707c7
TM		 1156 rcu_read_lock();
1157 delegation = rcu_dereference(NFS_I(inode)->delegation);
1158 if (delegation)
1159 delegation_flags = delegation->flags;
1160 rcu_read_unlock();
652f89f6
TM		 1161 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1162 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1163 "returning a delegation for "
1164 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1165 clp->cl_hostname);
652f89f6 1166 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1167 nfs_inode_set_delegation(state->inode,
1168 data->owner->so_cred,
1169 &data->o_res);
1170 else
1171 nfs_inode_reclaim_delegation(state->inode,
1172 data->owner->so_cred,
1173 &data->o_res);
1174 }
34310430
TM		 1175
1176 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1177 data->o_arg.fmode);
24ac23ab 1178 iput(inode);
aac00a8d 1179out:
24ac23ab 1180 return state;
1b370bc2
TM		 1181err_put_inode:
1182 iput(inode);
1183err:
1184 return ERR_PTR(ret);
24ac23ab
TM		 1185}
1186
864472e9
TM		 1187static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1188{
1189 struct nfs_inode *nfsi = NFS_I(state->inode);
1190 struct nfs_open_context *ctx;
1191
1192 spin_lock(&state->inode->i_lock);
1193 list_for_each_entry(ctx, &nfsi->open_files, list) {
1194 if (ctx->state != state)
1195 continue;
1196 get_nfs_open_context(ctx);
1197 spin_unlock(&state->inode->i_lock);
1198 return ctx;
1199 }
1200 spin_unlock(&state->inode->i_lock);
1201 return ERR_PTR(-ENOENT);
1202}
1203
6f220ed5
TM		 1204static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1205{
1206 struct nfs4_opendata *opendata;
1207
3d4ff43d 1208 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1209 if (opendata == NULL)
1210 return ERR_PTR(-ENOMEM);
1211 opendata->state = state;
1212 atomic_inc(&state->count);
1213 return opendata;
1214}
1215
dc0b027d 1216static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1217{
2ced46c2 1218 struct nfs4_state *newstate;
864472e9
TM		 1219 int ret;
1220
dc0b027d
TM		 1221 opendata->o_arg.open_flags = 0;
1222 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1223 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1224 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1225 nfs4_init_opendata_res(opendata);
b257957e 1226 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1227 if (ret != 0)
1228 return ret;
2ced46c2 1229 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1230 if (IS_ERR(newstate))
1231 return PTR_ERR(newstate);
643168c2 1232 nfs4_close_state(newstate, fmode);
2ced46c2 1233 *res = newstate;
864472e9
TM		 1234 return 0;
1235}
1236
1237static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1238{
864472e9 1239 struct nfs4_state *newstate;
864472e9
TM		 1240 int ret;
1241
1242 /* memory barrier prior to reading state->n_* */
2ced46c2 1243 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1244 smp_rmb();
1245 if (state->n_rdwr != 0) {
b0ed9dbc 1246 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1247 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1248 if (ret != 0)
1249 return ret;
2ced46c2
TM		 1250 if (newstate != state)
1251 return -ESTALE;
864472e9
TM		 1252 }
1253 if (state->n_wronly != 0) {
b0ed9dbc 1254 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1255 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1256 if (ret != 0)
1257 return ret;
2ced46c2
TM		 1258 if (newstate != state)
1259 return -ESTALE;
864472e9
TM		 1260 }
1261 if (state->n_rdonly != 0) {
b0ed9dbc 1262 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1263 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1264 if (ret != 0)
1265 return ret;
2ced46c2
TM		 1266 if (newstate != state)
1267 return -ESTALE;
864472e9 1268 }
1ac7e2fd
TM		 1269 /*
1270 * We may have performed cached opens for all three recoveries.
1271 * Check if we need to update the current stateid.
1272 */
1273 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1274 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1275 write_seqlock(&state->seqlock);
1ac7e2fd 1276 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1277 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1278 write_sequnlock(&state->seqlock);
1ac7e2fd 1279 }
864472e9
TM		 1280 return 0;
1281}
1282
1da177e4
LT		 1283/*
1284 * OPEN_RECLAIM:
1285 * reclaim state on the server after a reboot.
1da177e4 1286 */
539cd03a 1287static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1288{
1ac7e2fd 1289 struct nfs_delegation *delegation;
864472e9 1290 struct nfs4_opendata *opendata;
dc0b027d 1291 fmode_t delegation_type = 0;
1da177e4
LT		 1292 int status;
1293
6f220ed5
TM		 1294 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1295 if (IS_ERR(opendata))
1296 return PTR_ERR(opendata);
864472e9
TM		 1297 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1298 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1299 rcu_read_lock();
1300 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1301 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1302 delegation_type = delegation->type;
1ac7e2fd 1303 rcu_read_unlock();
864472e9
TM		 1304 opendata->o_arg.u.delegation_type = delegation_type;
1305 status = nfs4_open_recover(opendata, state);
c6d00e63 1306 nfs4_opendata_put(opendata);
1da177e4
LT		 1307 return status;
1308}
1309
539cd03a 1310static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1311{
1312 struct nfs_server *server = NFS_SERVER(state->inode);
1313 struct nfs4_exception exception = { };
1314 int err;
1315 do {
539cd03a 1316 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1317 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1318 break;
1319 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1320 } while (exception.retry);
1321 return err;
1322}
1323
864472e9
TM		 1324static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1325{
1326 struct nfs_open_context *ctx;
1327 int ret;
1328
1329 ctx = nfs4_state_find_open_context(state);
1330 if (IS_ERR(ctx))
1331 return PTR_ERR(ctx);
539cd03a 1332 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1333 put_nfs_open_context(ctx);
1334 return ret;
1335}
1336
13437e12 1337static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1338{
e56e0b78 1339 struct nfs4_opendata *opendata;
864472e9 1340 int ret;
1da177e4 1341
6f220ed5
TM		 1342 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1343 if (IS_ERR(opendata))
1344 return PTR_ERR(opendata);
e56e0b78 1345 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1346 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1347 ret = nfs4_open_recover(opendata, state);
c6d00e63 1348 nfs4_opendata_put(opendata);
864472e9 1349 return ret;
1da177e4
LT		 1350}
1351
13437e12 1352int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1353{
1354 struct nfs4_exception exception = { };
539cd03a 1355 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1356 int err;
1357 do {
13437e12 1358 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1359 switch (err) {
1360 case 0:
965b5d67
TM		 1361 case -ENOENT:
1362 case -ESTALE:
1363 goto out;
bcfa49f6
RL		 1364 case -NFS4ERR_BADSESSION:
1365 case -NFS4ERR_BADSLOT:
1366 case -NFS4ERR_BAD_HIGH_SLOT:
1367 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1368 case -NFS4ERR_DEADSESSION:
9f594791 1369 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1370 goto out;
1da177e4
LT		 1371 case -NFS4ERR_STALE_CLIENTID:
1372 case -NFS4ERR_STALE_STATEID:
1373 case -NFS4ERR_EXPIRED:
1374 /* Don't recall a delegation if it was lost */
0400a6b0 1375 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1376 goto out;
1377 case -ERESTARTSYS:
1378 /*
1379 * The show must go on: exit, but mark the
1380 * stateid as needing recovery.
1381 */
a1d0b5ee 1382 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1383 case -NFS4ERR_ADMIN_REVOKED:
1384 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1385 nfs_inode_find_state_and_recover(state->inode,
1386 stateid);
0400a6b0 1387 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1388 case -EKEYEXPIRED:
1389 /*
1390 * User RPCSEC_GSS context has expired.
1391 * We cannot recover this stateid now, so
1392 * skip it and allow recovery thread to
1393 * proceed.
1394 */
965b5d67
TM		 1395 case -ENOMEM:
1396 err = 0;
1397 goto out;
1da177e4
LT		 1398 }
1399 err = nfs4_handle_exception(server, err, &exception);
1400 } while (exception.retry);
965b5d67 1401out:
1da177e4
LT		 1402 return err;
1403}
1404
cdd4e68b
TM		 1405static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1406{
1407 struct nfs4_opendata *data = calldata;
1408
1409 data->rpc_status = task->tk_status;
26e976a8 1410 if (data->rpc_status == 0) {
f597c537 1411 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1412 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1413 renew_lease(data->o_res.server, data->timestamp);
3e309914 1414 data->rpc_done = 1;
26e976a8 1415 }
cdd4e68b
TM		 1416}
1417
1418static void nfs4_open_confirm_release(void *calldata)
1419{
1420 struct nfs4_opendata *data = calldata;
1421 struct nfs4_state *state = NULL;
1422
1423 /* If this request hasn't been cancelled, do nothing */
1424 if (data->cancelled == 0)
1425 goto out_free;
1426 /* In case of error, no cleanup! */
3e309914 1427 if (!data->rpc_done)
cdd4e68b 1428 goto out_free;
cdd4e68b 1429 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1430 if (!IS_ERR(state))
643168c2 1431 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1432out_free:
c6d00e63 1433 nfs4_opendata_put(data);
cdd4e68b
TM		 1434}
1435
1436static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1437 .rpc_call_done = nfs4_open_confirm_done,
1438 .rpc_release = nfs4_open_confirm_release,
1439};
1440
1441/*
1442 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1443 */
1444static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1445{
1446 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1447 struct rpc_task *task;
5138fde0
TM		 1448 struct rpc_message msg = {
1449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1450 .rpc_argp = &data->c_arg,
1451 .rpc_resp = &data->c_res,
1452 .rpc_cred = data->owner->so_cred,
1453 };
c970aa85
TM		 1454 struct rpc_task_setup task_setup_data = {
1455 .rpc_client = server->client,
5138fde0 1456 .rpc_message = &msg,
c970aa85
TM		 1457 .callback_ops = &nfs4_open_confirm_ops,
1458 .callback_data = data,
101070ca 1459 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1460 .flags = RPC_TASK_ASYNC,
1461 };
1da177e4
LT		 1462 int status;
1463
c6d00e63 1464 kref_get(&data->kref);
3e309914
TM		 1465 data->rpc_done = 0;
1466 data->rpc_status = 0;
5138fde0 1467 data->timestamp = jiffies;
c970aa85 1468 task = rpc_run_task(&task_setup_data);
7a1218a2 1469 if (IS_ERR(task))
cdd4e68b 1470 return PTR_ERR(task);
cdd4e68b
TM		 1471 status = nfs4_wait_for_completion_rpc_task(task);
1472 if (status != 0) {
1473 data->cancelled = 1;
1474 smp_wmb();
1475 } else
1476 status = data->rpc_status;
e6b3c4db 1477 rpc_put_task(task);
1da177e4
LT		 1478 return status;
1479}
1480
24ac23ab 1481static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1482{
24ac23ab
TM		 1483 struct nfs4_opendata *data = calldata;
1484 struct nfs4_state_owner *sp = data->owner;
5138fde0 1485
24ac23ab
TM		 1486 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1487 return;
aac00a8d
TM		 1488 /*
1489 * Check if we still need to send an OPEN call, or if we can use
1490 * a delegation instead.
1491 */
1492 if (data->state != NULL) {
1493 struct nfs_delegation *delegation;
1494
dc0b027d 1495 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1496 goto out_no_action;
aac00a8d
TM		 1497 rcu_read_lock();
1498 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1499 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1500 can_open_delegated(delegation, data->o_arg.fmode))
1501 goto unlock_no_action;
aac00a8d
TM		 1502 rcu_read_unlock();
1503 }
95b72eb0 1504 /* Update client id. */
1f0e890d 1505 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1506 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1507 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1508 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1509 }
26e976a8 1510 data->timestamp = jiffies;
035168ab 1511 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1512 &data->o_arg.seq_args,
9d12b216 1513 &data->o_res.seq_res, task))
d898528c 1514 return;
5138fde0 1515 rpc_call_start(task);
6ee41268 1516 return;
652f89f6
TM		 1517unlock_no_action:
1518 rcu_read_unlock();
6ee41268
TM		 1519out_no_action:
1520 task->tk_action = NULL;
1521
24ac23ab 1522}
1da177e4 1523
b257957e
AB		 1524static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1525{
1526 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1527 nfs4_open_prepare(task, calldata);
1528}
1529
24ac23ab
TM		 1530static void nfs4_open_done(struct rpc_task *task, void *calldata)
1531{
1532 struct nfs4_opendata *data = calldata;
1da177e4 1533
24ac23ab 1534 data->rpc_status = task->tk_status;
d898528c 1535
14516c3a
TM		 1536 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1537 return;
d898528c 1538
24ac23ab
TM		 1539 if (task->tk_status == 0) {
1540 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1541 case S_IFREG:
1542 break;
1543 case S_IFLNK:
24ac23ab 1544 data->rpc_status = -ELOOP;
6f926b5b
TM		 1545 break;
1546 case S_IFDIR:
24ac23ab 1547 data->rpc_status = -EISDIR;
6f926b5b
TM		 1548 break;
1549 default:
24ac23ab 1550 data->rpc_status = -ENOTDIR;
6f926b5b 1551 }
26e976a8 1552 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1553 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1554 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1555 }
3e309914 1556 data->rpc_done = 1;
24ac23ab 1557}
6f926b5b 1558
24ac23ab
TM		 1559static void nfs4_open_release(void *calldata)
1560{
1561 struct nfs4_opendata *data = calldata;
1562 struct nfs4_state *state = NULL;
1563
1564 /* If this request hasn't been cancelled, do nothing */
1565 if (data->cancelled == 0)
1566 goto out_free;
1567 /* In case of error, no cleanup! */
3e309914 1568 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1569 goto out_free;
1570 /* In case we need an open_confirm, no cleanup! */
1571 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1572 goto out_free;
24ac23ab 1573 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1574 if (!IS_ERR(state))
643168c2 1575 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1576out_free:
c6d00e63 1577 nfs4_opendata_put(data);
24ac23ab
TM		 1578}
1579
1580static const struct rpc_call_ops nfs4_open_ops = {
1581 .rpc_call_prepare = nfs4_open_prepare,
1582 .rpc_call_done = nfs4_open_done,
1583 .rpc_release = nfs4_open_release,
1584};
1585
b257957e
AB		 1586static const struct rpc_call_ops nfs4_recover_open_ops = {
1587 .rpc_call_prepare = nfs4_recover_open_prepare,
1588 .rpc_call_done = nfs4_open_done,
1589 .rpc_release = nfs4_open_release,
1590};
1591
1592static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1593{
1594 struct inode *dir = data->dir->d_inode;
1595 struct nfs_server *server = NFS_SERVER(dir);
1596 struct nfs_openargs *o_arg = &data->o_arg;
1597 struct nfs_openres *o_res = &data->o_res;
1598 struct rpc_task *task;
5138fde0
TM		 1599 struct rpc_message msg = {
1600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1601 .rpc_argp = o_arg,
1602 .rpc_resp = o_res,
1603 .rpc_cred = data->owner->so_cred,
1604 };
c970aa85
TM		 1605 struct rpc_task_setup task_setup_data = {
1606 .rpc_client = server->client,
5138fde0 1607 .rpc_message = &msg,
c970aa85
TM		 1608 .callback_ops = &nfs4_open_ops,
1609 .callback_data = data,
101070ca 1610 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1611 .flags = RPC_TASK_ASYNC,
1612 };
24ac23ab
TM		 1613 int status;
1614
9d12b216 1615 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1616 kref_get(&data->kref);
3e309914
TM		 1617 data->rpc_done = 0;
1618 data->rpc_status = 0;
2ced46c2 1619 data->cancelled = 0;
b257957e
AB		 1620 if (isrecover)
1621 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1622 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1623 if (IS_ERR(task))
1624 return PTR_ERR(task);
1625 status = nfs4_wait_for_completion_rpc_task(task);
1626 if (status != 0) {
1627 data->cancelled = 1;
1628 smp_wmb();
1629 } else
1630 status = data->rpc_status;
1631 rpc_put_task(task);
1632
1633 return status;
1634}
1635
1636static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1637{
1638 struct inode *dir = data->dir->d_inode;
1639 struct nfs_openres *o_res = &data->o_res;
1640 int status;
1641
1642 status = nfs4_run_open_task(data, 1);
1643 if (status != 0 || !data->rpc_done)
1644 return status;
1645
6926afd1
TM		 1646 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1647
b257957e
AB		 1648 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1649 status = _nfs4_proc_open_confirm(data);
1650 if (status != 0)
1651 return status;
1652 }
1653
1654 return status;
1655}
1656
6168f62c
WAA		 1657static int nfs4_opendata_access(struct rpc_cred *cred,
1658 struct nfs4_opendata *opendata,
1659 struct nfs4_state *state, fmode_t fmode)
1660{
1661 struct nfs_access_entry cache;
1662 u32 mask;
1663
1664 /* access call failed or for some reason the server doesn't
1665 * support any access modes -- defer access call until later */
1666 if (opendata->o_res.access_supported == 0)
1667 return 0;
1668
1669 mask = 0;
bbd3a8ee
WAA		 1670 /* don't check MAY_WRITE - a newly created file may not have
1671 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1672 if (fmode & FMODE_READ)
1673 mask |= MAY_READ;
6168f62c
WAA		 1674 if (fmode & FMODE_EXEC)
1675 mask |= MAY_EXEC;
1676
1677 cache.cred = cred;
1678 cache.jiffies = jiffies;
1679 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1680 nfs_access_add_cache(state->inode, &cache);
1681
bbd3a8ee 1682 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1683 return 0;
1684
1685 /* even though OPEN succeeded, access is denied. Close the file */
1686 nfs4_close_state(state, fmode);
1687 return -NFS4ERR_ACCESS;
1688}
1689
b257957e
AB		 1690/*
1691 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1692 */
1693static int _nfs4_proc_open(struct nfs4_opendata *data)
1694{
1695 struct inode *dir = data->dir->d_inode;
1696 struct nfs_server *server = NFS_SERVER(dir);
1697 struct nfs_openargs *o_arg = &data->o_arg;
1698 struct nfs_openres *o_res = &data->o_res;
1699 int status;
1700
1701 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1702 if (!data->rpc_done)
1703 return status;
1704 if (status != 0) {
1705 if (status == -NFS4ERR_BADNAME &&
1706 !(o_arg->open_flags & O_CREAT))
1707 return -ENOENT;
24ac23ab 1708 return status;
08ef7bd3 1709 }
24ac23ab 1710
6926afd1
TM		 1711 nfs_fattr_map_and_free_names(server, &data->f_attr);
1712
90ff0c54 1713 if (o_arg->open_flags & O_CREAT)
56ae19f3 1714 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1715 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1716 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1717 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1718 status = _nfs4_proc_open_confirm(data);
1da177e4 1719 if (status != 0)
24ac23ab 1720 return status;
1da177e4
LT		 1721 }
1722 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1723 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1724 return 0;
1da177e4
LT		 1725}
1726
d83217c1 1727static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1728{
a78cb57a 1729 unsigned int loop;
6b30954e 1730 int ret;
58d9714a 1731
a78cb57a 1732 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1733 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1734 if (ret != 0)
a78cb57a 1735 break;
e598d843
TM		 1736 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1737 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1738 break;
0400a6b0 1739 nfs4_schedule_state_manager(clp);
a78cb57a 1740 ret = -EIO;
6b30954e 1741 }
a78cb57a 1742 return ret;
58d9714a
TM		 1743}
1744
d83217c1
AA		 1745static int nfs4_recover_expired_lease(struct nfs_server *server)
1746{
1747 return nfs4_client_recover_expired_lease(server->nfs_client);
1748}
1749
1da177e4
LT		 1750/*
1751 * OPEN_EXPIRED:
1752 * reclaim state on the server after a network partition.
1753 * Assumes caller holds the appropriate lock
1754 */
539cd03a 1755static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1756{
e56e0b78 1757 struct nfs4_opendata *opendata;
864472e9 1758 int ret;
1da177e4 1759
6f220ed5
TM		 1760 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1761 if (IS_ERR(opendata))
1762 return PTR_ERR(opendata);
864472e9 1763 ret = nfs4_open_recover(opendata, state);
35d05778 1764 if (ret == -ESTALE)
3d4ff43d 1765 d_drop(ctx->dentry);
c6d00e63 1766 nfs4_opendata_put(opendata);
864472e9 1767 return ret;
1da177e4
LT		 1768}
1769
a9ed2e25 1770static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1771{
539cd03a 1772 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1773 struct nfs4_exception exception = { };
1774 int err;
1775
1776 do {
539cd03a 1777 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1778 switch (err) {
1779 default:
1780 goto out;
1781 case -NFS4ERR_GRACE:
1782 case -NFS4ERR_DELAY:
1783 nfs4_handle_exception(server, err, &exception);
1784 err = 0;
1785 }
202b50dc 1786 } while (exception.retry);
a9ed2e25 1787out:
202b50dc
TM		 1788 return err;
1789}
1790
1da177e4
LT		 1791static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1792{
1da177e4 1793 struct nfs_open_context *ctx;
864472e9 1794 int ret;
1da177e4 1795
864472e9
TM		 1796 ctx = nfs4_state_find_open_context(state);
1797 if (IS_ERR(ctx))
1798 return PTR_ERR(ctx);
539cd03a 1799 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1800 put_nfs_open_context(ctx);
1801 return ret;
1da177e4
LT		 1802}
1803
f062eb6c 1804#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1805static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1806{
f062eb6c 1807 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1808 nfs4_stateid *stateid = &state->stateid;
1809 int status;
1810
1811 /* If a state reset has been done, test_stateid is unneeded */
1812 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1813 return;
1814
1815 status = nfs41_test_stateid(server, stateid);
1816 if (status != NFS_OK) {
1817 /* Free the stateid unless the server explicitly
1818 * informs us the stateid is unrecognized. */
1819 if (status != -NFS4ERR_BAD_STATEID)
1820 nfs41_free_stateid(server, stateid);
6938867e 1821 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1822
6938867e
BS		 1823 write_seqlock(&state->seqlock);
1824 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1825 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1826 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1827 }
1828}
1829
1830/**
1831 * nfs41_check_open_stateid - possibly free an open stateid
1832 *
1833 * @state: NFSv4 state for an inode
1834 *
1835 * Returns NFS_OK if recovery for this stateid is now finished.
1836 * Otherwise a negative NFS4ERR value is returned.
1837 */
1838static int nfs41_check_open_stateid(struct nfs4_state *state)
1839{
1840 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1841 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1842 int status;
1843
1844 /* If a state reset has been done, test_stateid is unneeded */
1845 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1846 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1847 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1848 return -NFS4ERR_BAD_STATEID;
1849
1850 status = nfs41_test_stateid(server, stateid);
1851 if (status != NFS_OK) {
1852 /* Free the stateid unless the server explicitly
1853 * informs us the stateid is unrecognized. */
1854 if (status != -NFS4ERR_BAD_STATEID)
1855 nfs41_free_stateid(server, stateid);
1856
1857 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1858 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1859 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1860 }
1861 return status;
1862}
1863
1864static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1865{
eb64cf96 1866 int status;
b01dd1d8 1867
3e60ffdd
CL		 1868 nfs41_clear_delegation_stateid(state);
1869 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1870 if (status != NFS_OK)
1871 status = nfs4_open_expired(sp, state);
1872 return status;
f062eb6c
BS		 1873}
1874#endif
1875
aa53ed54
JL		 1876/*
1877 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1878 * fields corresponding to attributes that were used to store the verifier.
1879 * Make sure we clobber those fields in the later setattr call
1880 */
1881static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1882{
1883 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1884 !(sattr->ia_valid & ATTR_ATIME_SET))
1885 sattr->ia_valid |= ATTR_ATIME;
1886
1887 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1888 !(sattr->ia_valid & ATTR_MTIME_SET))
1889 sattr->ia_valid |= ATTR_MTIME;
1890}
1891
1da177e4 1892/*
24ac23ab 1893 * Returns a referenced nfs4_state
1da177e4 1894 */
82be417a
AA		 1895static int _nfs4_do_open(struct inode *dir,
1896 struct dentry *dentry,
1897 fmode_t fmode,
1898 int flags,
1899 struct iattr *sattr,
1900 struct rpc_cred *cred,
1901 struct nfs4_state **res,
1902 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1903{
1904 struct nfs4_state_owner *sp;
1905 struct nfs4_state *state = NULL;
1906 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1907 struct nfs4_opendata *opendata;
aac00a8d 1908 int status;
1da177e4
LT		 1909
1910 /* Protect against reboot recovery conflicts */
1da177e4 1911 status = -ENOMEM;
d1e284d5
TM		 1912 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1913 if (sp == NULL) {
1da177e4
LT		 1914 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1915 goto out_err;
1916 }
58d9714a
TM		 1917 status = nfs4_recover_expired_lease(server);
1918 if (status != 0)
b4454fe1 1919 goto err_put_state_owner;
82a2c1b7
AV		 1920 if (dentry->d_inode != NULL)
1921 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1922 status = -ENOMEM;
82a2c1b7 1923 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1924 if (opendata == NULL)
95d35cb4 1925 goto err_put_state_owner;
1da177e4 1926
82be417a
AA		 1927 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1928 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1929 if (!opendata->f_attr.mdsthreshold)
1930 goto err_opendata_put;
1549210f 1931 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1932 }
82a2c1b7
AV		 1933 if (dentry->d_inode != NULL)
1934 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1935
24ac23ab 1936 status = _nfs4_proc_open(opendata);
1da177e4 1937 if (status != 0)
c6d00e63 1938 goto err_opendata_put;
1da177e4 1939
24ac23ab 1940 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1941 status = PTR_ERR(state);
1942 if (IS_ERR(state))
c6d00e63 1943 goto err_opendata_put;
0df5dd4a 1944 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1945 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1946
6168f62c
WAA		 1947 status = nfs4_opendata_access(cred, opendata, state, fmode);
1948 if (status != 0)
1949 goto err_opendata_put;
1950
0ab64e0e
TM		 1951 if (opendata->o_arg.open_flags & O_EXCL) {
1952 nfs4_exclusive_attrset(opendata, sattr);
1953
1954 nfs_fattr_init(opendata->o_res.f_attr);
1955 status = nfs4_do_setattr(state->inode, cred,
1956 opendata->o_res.f_attr, sattr,
1957 state);
1958 if (status == 0)
1959 nfs_setattr_update_inode(state->inode, sattr);
1960 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1961 }
82be417a
AA		 1962
1963 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1964 *ctx_th = opendata->f_attr.mdsthreshold;
1965 else
1966 kfree(opendata->f_attr.mdsthreshold);
1967 opendata->f_attr.mdsthreshold = NULL;
1968
c6d00e63 1969 nfs4_opendata_put(opendata);
1da177e4 1970 nfs4_put_state_owner(sp);
1da177e4
LT		 1971 *res = state;
1972 return 0;
c6d00e63 1973err_opendata_put:
82be417a 1974 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1975 nfs4_opendata_put(opendata);
e56e0b78
TM		 1976err_put_state_owner:
1977 nfs4_put_state_owner(sp);
1da177e4 1978out_err:
1da177e4
LT		 1979 *res = NULL;
1980 return status;
1981}
1982
1983
82be417a
AA		 1984static struct nfs4_state *nfs4_do_open(struct inode *dir,
1985 struct dentry *dentry,
1986 fmode_t fmode,
1987 int flags,
1988 struct iattr *sattr,
1989 struct rpc_cred *cred,
1990 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1991{
1992 struct nfs4_exception exception = { };
1993 struct nfs4_state *res;
1994 int status;
1995
6168f62c 1996 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1997 do {
82be417a
AA		 1998 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1999 &res, ctx_th);
1da177e4
LT		 2000 if (status == 0)
2001 break;
2002 /* NOTE: BAD_SEQID means the server and client disagree about the
2003 * book-keeping w.r.t. state-changing operations
2004 * (OPEN/CLOSE/LOCK/LOCKU...)
2005 * It is actually a sign of a bug on the client or on the server.
2006 *
2007 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2008 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2009 * have unhashed the old state_owner for us, and that we can
2010 * therefore safely retry using a new one. We should still warn
2011 * the user though...
2012 */
2013 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2014 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2015 " returned a bad sequence-id error!\n",
2016 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2017 exception.retry = 1;
2018 continue;
2019 }
550f5747
TM		 2020 /*
2021 * BAD_STATEID on OPEN means that the server cancelled our
2022 * state before it received the OPEN_CONFIRM.
2023 * Recover by retrying the request as per the discussion
2024 * on Page 181 of RFC3530.
2025 */
2026 if (status == -NFS4ERR_BAD_STATEID) {
2027 exception.retry = 1;
2028 continue;
2029 }
aac00a8d
TM		 2030 if (status == -EAGAIN) {
2031 /* We must have found a delegation */
2032 exception.retry = 1;
2033 continue;
2034 }
1da177e4
LT		 2035 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2036 status, &exception));
2037 } while (exception.retry);
2038 return res;
2039}
2040
659bfcd6
TM		 2041static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2042 struct nfs_fattr *fattr, struct iattr *sattr,
2043 struct nfs4_state *state)
1da177e4 2044{
3e4f6290 2045 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2046 struct nfs_setattrargs arg = {
3e4f6290 2047 .fh = NFS_FH(inode),
1da177e4
LT		 2048 .iap = sattr,
2049 .server = server,
2050 .bitmask = server->attr_bitmask,
2051 };
2052 struct nfs_setattrres res = {
2053 .fattr = fattr,
2054 .server = server,
2055 };
2056 struct rpc_message msg = {
659bfcd6
TM		 2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2058 .rpc_argp = &arg,
2059 .rpc_resp = &res,
2060 .rpc_cred = cred,
1da177e4 2061 };
26e976a8 2062 unsigned long timestamp = jiffies;
65e4308d 2063 int status;
1da177e4 2064
0e574af1 2065 nfs_fattr_init(fattr);
1da177e4 2066
4fc8796d 2067 if (state != NULL) {
2a369153
TM		 2068 struct nfs_lockowner lockowner = {
2069 .l_owner = current->files,
2070 .l_pid = current->tgid,
2071 };
4fc8796d 2072 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2073 &lockowner);
4fc8796d
TM		 2074 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2075 FMODE_WRITE)) {
3e4f6290 2076 /* Use that stateid */
08e9eac4 2077 } else
f597c537 2078 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2079
7c513058 2080 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2081 if (status == 0 && state != NULL)
2082 renew_lease(server, timestamp);
65e4308d 2083 return status;
1da177e4
LT		 2084}
2085
659bfcd6
TM		 2086static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2087 struct nfs_fattr *fattr, struct iattr *sattr,
2088 struct nfs4_state *state)
1da177e4 2089{
3e4f6290 2090 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2091 struct nfs4_exception exception = {
2092 .state = state,
3114ea7a 2093 .inode = inode,
a1d0b5ee 2094 };
1da177e4
LT		 2095 int err;
2096 do {
451146be
TM		 2097 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2098 switch (err) {
2099 case -NFS4ERR_OPENMODE:
2100 if (state && !(state->state & FMODE_WRITE)) {
2101 err = -EBADF;
2102 if (sattr->ia_valid & ATTR_OPEN)
2103 err = -EACCES;
2104 goto out;
2105 }
2106 }
2107 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2108 } while (exception.retry);
451146be 2109out:
1da177e4
LT		 2110 return err;
2111}
2112
2113struct nfs4_closedata {
2114 struct inode *inode;
2115 struct nfs4_state *state;
2116 struct nfs_closeargs arg;
2117 struct nfs_closeres res;
516a6af6 2118 struct nfs_fattr fattr;
26e976a8 2119 unsigned long timestamp;
f7e8917a
FI		 2120 bool roc;
2121 u32 roc_barrier;
1da177e4
LT		 2122};
2123
963d8fe5 2124static void nfs4_free_closedata(void *data)
9512135d 2125{
963d8fe5
TM		 2126 struct nfs4_closedata *calldata = data;
2127 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2128 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2129
f7e8917a
FI		 2130 if (calldata->roc)
2131 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2132 nfs4_put_open_state(calldata->state);
2133 nfs_free_seqid(calldata->arg.seqid);
9512135d 2134 nfs4_put_state_owner(sp);
643168c2 2135 nfs_sb_deactive(sb);
9512135d
TM		 2136 kfree(calldata);
2137}
2138
88069f77
TM		 2139static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2140 fmode_t fmode)
2141{
2142 spin_lock(&state->owner->so_lock);
2143 if (!(fmode & FMODE_READ))
2144 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2145 if (!(fmode & FMODE_WRITE))
2146 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2147 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2148 spin_unlock(&state->owner->so_lock);
2149}
2150
963d8fe5 2151static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2152{
963d8fe5 2153 struct nfs4_closedata *calldata = data;
1da177e4 2154 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2155 struct nfs_server *server = NFS_SERVER(calldata->inode);
2156
a3ca5651 2157 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2158 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2159 return;
1da177e4
LT		 2160 /* hmm. we are done with the inode, and in the process of freeing
2161 * the state_owner. we keep this around to process errors
2162 */
1da177e4
LT		 2163 switch (task->tk_status) {
2164 case 0:
f7e8917a
FI		 2165 if (calldata->roc)
2166 pnfs_roc_set_barrier(state->inode,
2167 calldata->roc_barrier);
45328c35 2168 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2169 renew_lease(server, calldata->timestamp);
88069f77
TM		 2170 nfs4_close_clear_stateid_flags(state,
2171 calldata->arg.fmode);
1da177e4
LT		 2172 break;
2173 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2174 case -NFS4ERR_OLD_STATEID:
2175 case -NFS4ERR_BAD_STATEID:
1da177e4 2176 case -NFS4ERR_EXPIRED:
dc0b027d 2177 if (calldata->arg.fmode == 0)
9e33bed5 2178 break;
1da177e4 2179 default:
72211dbe
TM		 2180 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2181 rpc_restart_call_prepare(task);
1da177e4 2182 }
72211dbe 2183 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2184 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2185 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2186}
2187
4ce70ada 2188static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2189{
4ce70ada 2190 struct nfs4_closedata *calldata = data;
9512135d 2191 struct nfs4_state *state = calldata->state;
7fdab069 2192 struct inode *inode = calldata->inode;
88069f77 2193 int call_close = 0;
9512135d 2194
a3ca5651 2195 dprintk("%s: begin!\n", __func__);
963d8fe5 2196 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2197 return;
003707c7 2198
88069f77
TM		 2199 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2200 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2201 spin_lock(&state->owner->so_lock);
003707c7 2202 /* Calculate the change in open mode */
e7616923 2203 if (state->n_rdwr == 0) {
003707c7 2204 if (state->n_rdonly == 0) {
88069f77
TM		 2205 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2206 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2207 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2208 }
2209 if (state->n_wronly == 0) {
88069f77
TM		 2210 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2211 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2212 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2213 }
e7616923 2214 }
4cecb76f 2215 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2216
2217 if (!call_close) {
963d8fe5
TM		 2218 /* Note: exit _without_ calling nfs4_close_done */
2219 task->tk_action = NULL;
a3ca5651 2220 goto out;
9512135d 2221 }
88069f77 2222
f7e8917a 2223 if (calldata->arg.fmode == 0) {
88069f77 2224 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2225 if (calldata->roc &&
7fdab069 2226 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2227 goto out;
f7e8917a 2228 }
88069f77 2229
516a6af6 2230 nfs_fattr_init(calldata->res.fattr);
26e976a8 2231 calldata->timestamp = jiffies;
7fdab069 2232 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2233 &calldata->arg.seq_args,
2234 &calldata->res.seq_res,
2235 task))
a3ca5651 2236 goto out;
5138fde0 2237 rpc_call_start(task);
a3ca5651
CL		 2238out:
2239 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2240}
2241
963d8fe5 2242static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2243 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2244 .rpc_call_done = nfs4_close_done,
2245 .rpc_release = nfs4_free_closedata,
2246};
2247
1da177e4
LT		 2248/*
2249 * It is possible for data to be read/written from a mem-mapped file
2250 * after the sys_close call (which hits the vfs layer as a flush).
2251 * This means that we can't safely call nfsv4 close on a file until
2252 * the inode is cleared. This in turn means that we are not good
2253 * NFSv4 citizens - we do not indicate to the server to update the file's
2254 * share state even when we are done with one of the three share
2255 * stateid's in the inode.
2256 *
2257 * NOTE: Caller must be holding the sp->so_owner semaphore!
2258 */
1f7977c1 2259int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2260{
4a35bd41 2261 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2262 struct nfs4_closedata *calldata;
b39e625b
TM		 2263 struct nfs4_state_owner *sp = state->owner;
2264 struct rpc_task *task;
5138fde0
TM		 2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2267 .rpc_cred = state->owner->so_cred,
2268 };
c970aa85
TM		 2269 struct rpc_task_setup task_setup_data = {
2270 .rpc_client = server->client,
5138fde0 2271 .rpc_message = &msg,
c970aa85 2272 .callback_ops = &nfs4_close_ops,
101070ca 2273 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2274 .flags = RPC_TASK_ASYNC,
2275 };
9512135d 2276 int status = -ENOMEM;
1da177e4 2277
8535b2be 2278 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2279 if (calldata == NULL)
9512135d 2280 goto out;
9d12b216 2281 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2282 calldata->inode = state->inode;
1da177e4 2283 calldata->state = state;
4a35bd41 2284 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2285 calldata->arg.stateid = &state->open_stateid;
1da177e4 2286 /* Serialization for the sequence id */
8535b2be 2287 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2288 if (calldata->arg.seqid == NULL)
2289 goto out_free_calldata;
dc0b027d 2290 calldata->arg.fmode = 0;
a65318bf 2291 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2292 calldata->res.fattr = &calldata->fattr;
c1d51931 2293 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2294 calldata->res.server = server;
1f7977c1 2295 calldata->roc = pnfs_roc(state->inode);
643168c2 2296 nfs_sb_active(calldata->inode->i_sb);
9512135d 2297
1174dd1f
TM		 2298 msg.rpc_argp = &calldata->arg;
2299 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2300 task_setup_data.callback_data = calldata;
2301 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2302 if (IS_ERR(task))
2303 return PTR_ERR(task);
a49c3c77
TM		 2304 status = 0;
2305 if (wait)
2306 status = rpc_wait_for_completion_task(task);
b39e625b 2307 rpc_put_task(task);
a49c3c77 2308 return status;
9512135d
TM		 2309out_free_calldata:
2310 kfree(calldata);
2311out:
b39e625b
TM		 2312 nfs4_put_open_state(state);
2313 nfs4_put_state_owner(sp);
9512135d 2314 return status;
1da177e4
LT		 2315}
2316
2b484297 2317static struct inode *
cd9a1c0e 2318nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2319{
1da177e4 2320 struct nfs4_state *state;
1da177e4 2321
565277f6 2322 /* Protect against concurrent sillydeletes */
82be417a
AA		 2323 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2324 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2325 if (IS_ERR(state))
2326 return ERR_CAST(state);
cd9a1c0e 2327 ctx->state = state;
f46e0bd3 2328 return igrab(state->inode);
1da177e4
LT		 2329}
2330
1185a552 2331static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2332{
2333 if (ctx->state == NULL)
2334 return;
2335 if (is_sync)
643168c2 2336 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2337 else
643168c2 2338 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2339}
1da177e4
LT		 2340
2341static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2342{
43652ad5
BH		 2343 struct nfs4_server_caps_arg args = {
2344 .fhandle = fhandle,
2345 };
1da177e4
LT		 2346 struct nfs4_server_caps_res res = {};
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2349 .rpc_argp = &args,
1da177e4
LT		 2350 .rpc_resp = &res,
2351 };
2352 int status;
2353
7c513058 2354 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2355 if (status == 0) {
2356 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2357 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2358 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2359 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2360 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2361 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2362 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2363 server->caps |= NFS_CAP_ACLS;
2364 if (res.has_links != 0)
2365 server->caps |= NFS_CAP_HARDLINKS;
2366 if (res.has_symlinks != 0)
2367 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2368 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2369 server->caps |= NFS_CAP_FILEID;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2371 server->caps |= NFS_CAP_MODE;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2373 server->caps |= NFS_CAP_NLINK;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2375 server->caps |= NFS_CAP_OWNER;
2376 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2377 server->caps |= NFS_CAP_OWNER_GROUP;
2378 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2379 server->caps |= NFS_CAP_ATIME;
2380 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2381 server->caps |= NFS_CAP_CTIME;
2382 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2383 server->caps |= NFS_CAP_MTIME;
2384
a65318bf
TM		 2385 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2386 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2387 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2388 server->acl_bitmask = res.acl_bitmask;
264e6351 2389 server->fh_expire_type = res.fh_expire_type;
1da177e4 2390 }
cccef3b9 2391
1da177e4
LT		 2392 return status;
2393}
2394
55a97593 2395int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2396{
2397 struct nfs4_exception exception = { };
2398 int err;
2399 do {
2400 err = nfs4_handle_exception(server,
2401 _nfs4_server_capabilities(server, fhandle),
2402 &exception);
2403 } while (exception.retry);
2404 return err;
2405}
2406
2407static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2408 struct nfs_fsinfo *info)
2409{
1da177e4
LT		 2410 struct nfs4_lookup_root_arg args = {
2411 .bitmask = nfs4_fattr_bitmap,
2412 };
2413 struct nfs4_lookup_res res = {
2414 .server = server,
0e574af1 2415 .fattr = info->fattr,
1da177e4
LT		 2416 .fh = fhandle,
2417 };
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2420 .rpc_argp = &args,
2421 .rpc_resp = &res,
2422 };
008f55d0 2423
0e574af1 2424 nfs_fattr_init(info->fattr);
7c513058 2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2426}
2427
2428static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2429 struct nfs_fsinfo *info)
2430{
2431 struct nfs4_exception exception = { };
2432 int err;
2433 do {
fb8a5ba8
BS		 2434 err = _nfs4_lookup_root(server, fhandle, info);
2435 switch (err) {
2436 case 0:
2437 case -NFS4ERR_WRONGSEC:
05e9cfb4 2438 goto out;
fb8a5ba8
BS		 2439 default:
2440 err = nfs4_handle_exception(server, err, &exception);
2441 }
1da177e4 2442 } while (exception.retry);
05e9cfb4 2443out:
1da177e4
LT		 2444 return err;
2445}
2446
8f70e95f
BS		 2447static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2448 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2449{
2450 struct rpc_auth *auth;
2451 int ret;
2452
2453 auth = rpcauth_create(flavor, server->client);
e8d920c5 2454 if (IS_ERR(auth)) {
8f70e95f
BS		 2455 ret = -EIO;
2456 goto out;
2457 }
2458 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2459out:
2460 return ret;
2461}
2462
801a16dc 2463static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2464 struct nfs_fsinfo *info)
1da177e4 2465{
8f70e95f 2466 int i, len, status = 0;
0fabee24 2467 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2468
6a1a1e34
CL		 2469 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2470 BUG_ON(len < 0);
8f70e95f
BS		 2471
2472 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2473 /* AUTH_UNIX is the default flavor if none was specified,
2474 * thus has already been tried. */
2475 if (flav_array[i] == RPC_AUTH_UNIX)
2476 continue;
2477
8f70e95f 2478 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2479 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2480 continue;
2481 break;
8f70e95f 2482 }
fb8a5ba8
BS		 2483 /*
2484 * -EACCESS could mean that the user doesn't have correct permissions
2485 * to access the mount. It could also mean that we tried to mount
2486 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2487 * existing mount programs don't handle -EACCES very well so it should
2488 * be mapped to -EPERM instead.
2489 */
2490 if (status == -EACCES)
2491 status = -EPERM;
801a16dc
BS		 2492 return status;
2493}
2494
2495/*
2496 * get the file handle for the "/" directory on the server
2497 */
3028eb2b
BS		 2498int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2499 struct nfs_fsinfo *info)
801a16dc 2500{
fca78d6d 2501 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2502 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2503 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2504 /*
2505 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2506 * by nfs4_map_errors() as this function exits.
2507 */
fca78d6d 2508 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2509 if (status == 0)
2510 status = nfs4_server_capabilities(server, fhandle);
2511 if (status == 0)
2512 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2513 return nfs4_map_errors(status);
1da177e4
LT		 2514}
2515
bae36241
BS		 2516static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2517 struct nfs_fsinfo *info)
2518{
2519 int error;
2520 struct nfs_fattr *fattr = info->fattr;
2521
2522 error = nfs4_server_capabilities(server, mntfh);
2523 if (error < 0) {
2524 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2525 return error;
2526 }
2527
2528 error = nfs4_proc_getattr(server, mntfh, fattr);
2529 if (error < 0) {
2530 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2531 return error;
2532 }
2533
2534 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2535 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2536 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2537
2538 return error;
2539}
2540
6b97fd3d
MN		 2541/*
2542 * Get locations and (maybe) other attributes of a referral.
2543 * Note that we'll actually follow the referral later when
2544 * we detect fsid mismatch in inode revalidation
2545 */
f05d147f
BS		 2546static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2547 const struct qstr *name, struct nfs_fattr *fattr,
2548 struct nfs_fh *fhandle)
6b97fd3d
MN		 2549{
2550 int status = -ENOMEM;
2551 struct page *page = NULL;
2552 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2553
2554 page = alloc_page(GFP_KERNEL);
2555 if (page == NULL)
2556 goto out;
2557 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2558 if (locations == NULL)
2559 goto out;
2560
f05d147f 2561 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2562 if (status != 0)
2563 goto out;
2564 /* Make sure server returned a different fsid for the referral */
2565 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2566 dprintk("%s: server did not return a different fsid for"
2567 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2568 status = -EIO;
2569 goto out;
2570 }
533eb461
AA		 2571 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2572 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2573
533eb461 2574 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2575 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2576 memset(fhandle, 0, sizeof(struct nfs_fh));
2577out:
2578 if (page)
2579 __free_page(page);
5d7ca35a 2580 kfree(locations);
6b97fd3d
MN		 2581 return status;
2582}
2583
1da177e4
LT		 2584static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2585{
2586 struct nfs4_getattr_arg args = {
2587 .fh = fhandle,
2588 .bitmask = server->attr_bitmask,
2589 };
2590 struct nfs4_getattr_res res = {
2591 .fattr = fattr,
2592 .server = server,
2593 };
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2596 .rpc_argp = &args,
2597 .rpc_resp = &res,
2598 };
2599
0e574af1 2600 nfs_fattr_init(fattr);
7c513058 2601 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2602}
2603
2604static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2605{
2606 struct nfs4_exception exception = { };
2607 int err;
2608 do {
2609 err = nfs4_handle_exception(server,
2610 _nfs4_proc_getattr(server, fhandle, fattr),
2611 &exception);
2612 } while (exception.retry);
2613 return err;
2614}
2615
2616/*
2617 * The file is not closed if it is opened due to the a request to change
2618 * the size of the file. The open call will not be needed once the
2619 * VFS layer lookup-intents are implemented.
2620 *
2621 * Close is called when the inode is destroyed.
2622 * If we haven't opened the file for O_WRONLY, we
2623 * need to in the size_change case to obtain a stateid.
2624 *
2625 * Got race?
2626 * Because OPEN is always done by name in nfsv4, it is
2627 * possible that we opened a different file by the same
2628 * name. We can recognize this race condition, but we
2629 * can't do anything about it besides returning an error.
2630 *
2631 * This will be fixed with VFS changes (lookup-intent).
2632 */
2633static int
2634nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2635 struct iattr *sattr)
2636{
08e9eac4 2637 struct inode *inode = dentry->d_inode;
659bfcd6 2638 struct rpc_cred *cred = NULL;
d530838b 2639 struct nfs4_state *state = NULL;
1da177e4
LT		 2640 int status;
2641
8a1636c4
BH		 2642 if (pnfs_ld_layoutret_on_setattr(inode))
2643 pnfs_return_layout(inode);
2644
0e574af1 2645 nfs_fattr_init(fattr);
1da177e4 2646
2669940d
AA		 2647 /* Deal with open(O_TRUNC) */
2648 if (sattr->ia_valid & ATTR_OPEN)
2649 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2650
2651 /* Optimization: if the end result is no change, don't RPC */
2652 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2653 return 0;
2654
d530838b 2655 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2656 if (sattr->ia_valid & ATTR_FILE) {
2657 struct nfs_open_context *ctx;
2658
2659 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2660 if (ctx) {
2661 cred = ctx->cred;
2662 state = ctx->state;
2663 }
659bfcd6 2664 }
08e9eac4 2665
659bfcd6 2666 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2667 if (status == 0)
2668 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2669 return status;
2670}
2671
0c2e53f1
TM		 2672static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2673 const struct qstr *name, struct nfs_fh *fhandle,
2674 struct nfs_fattr *fattr)
2b3de441 2675{
0c2e53f1 2676 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2677 int status;
2678 struct nfs4_lookup_arg args = {
2679 .bitmask = server->attr_bitmask,
0c2e53f1 2680 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2681 .name = name,
2682 };
2683 struct nfs4_lookup_res res = {
2684 .server = server,
2685 .fattr = fattr,
2686 .fh = fhandle,
2687 };
2688 struct rpc_message msg = {
2689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2690 .rpc_argp = &args,
2691 .rpc_resp = &res,
2692 };
2693
2694 nfs_fattr_init(fattr);
2695
1da177e4 2696 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2697 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2698 dprintk("NFS reply lookup: %d\n", status);
2699 return status;
2700}
2701
72de53ec 2702static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2703{
7ebb9315 2704 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2705 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2706 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2707 fattr->nlink = 2;
2708}
2709
72de53ec
BS		 2710static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2711 struct qstr *name, struct nfs_fh *fhandle,
2712 struct nfs_fattr *fattr)
1da177e4
LT		 2713{
2714 struct nfs4_exception exception = { };
72de53ec 2715 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2716 int err;
2717 do {
72de53ec
BS		 2718 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2719 switch (err) {
08ef7bd3 2720 case -NFS4ERR_BADNAME:
72de53ec
BS		 2721 err = -ENOENT;
2722 goto out;
0c2e53f1 2723 case -NFS4ERR_MOVED:
f05d147f 2724 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2725 goto out;
0c2e53f1 2726 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2727 err = -EPERM;
2728 if (client != *clnt)
2729 goto out;
2730
2731 client = nfs4_create_sec_client(client, dir, name);
2732 if (IS_ERR(client))
2733 return PTR_ERR(client);
2734
2735 exception.retry = 1;
2736 break;
2737 default:
2738 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2739 }
1da177e4 2740 } while (exception.retry);
72de53ec
BS		 2741
2742out:
2743 if (err == 0)
2744 *clnt = client;
2745 else if (client != *clnt)
2746 rpc_shutdown_client(client);
2747
1da177e4
LT		 2748 return err;
2749}
2750
80a16b21 2751static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2752 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2753{
2754 int status;
2755 struct rpc_clnt *client = NFS_CLIENT(dir);
2756
2757 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2758 if (client != NFS_CLIENT(dir)) {
2759 rpc_shutdown_client(client);
2760 nfs_fixup_secinfo_attributes(fattr);
2761 }
2762 return status;
2763}
2764
f05d147f
BS		 2765struct rpc_clnt *
2766nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2767 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2768{
2769 int status;
2770 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2771
2772 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2773 if (status < 0) {
2774 rpc_shutdown_client(client);
2775 return ERR_PTR(status);
2776 }
2777 return client;
2778}
2779
1da177e4
LT		 2780static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2781{
76b32999 2782 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2783 struct nfs4_accessargs args = {
2784 .fh = NFS_FH(inode),
a4980e78 2785 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2786 };
2787 struct nfs4_accessres res = {
2788 .server = server,
1da177e4 2789 };
1da177e4
LT		 2790 struct rpc_message msg = {
2791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2792 .rpc_argp = &args,
2793 .rpc_resp = &res,
2794 .rpc_cred = entry->cred,
2795 };
2796 int mode = entry->mask;
2797 int status;
2798
2799 /*
2800 * Determine which access bits we want to ask for...
2801 */
2802 if (mode & MAY_READ)
2803 args.access |= NFS4_ACCESS_READ;
2804 if (S_ISDIR(inode->i_mode)) {
2805 if (mode & MAY_WRITE)
2806 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2807 if (mode & MAY_EXEC)
2808 args.access |= NFS4_ACCESS_LOOKUP;
2809 } else {
2810 if (mode & MAY_WRITE)
2811 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2812 if (mode & MAY_EXEC)
2813 args.access |= NFS4_ACCESS_EXECUTE;
2814 }
c407d41a
TM		 2815
2816 res.fattr = nfs_alloc_fattr();
2817 if (res.fattr == NULL)
2818 return -ENOMEM;
2819
7c513058 2820 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2821 if (!status) {
6168f62c 2822 nfs_access_set_mask(entry, res.access);
c407d41a 2823 nfs_refresh_inode(inode, res.fattr);
1da177e4 2824 }
c407d41a 2825 nfs_free_fattr(res.fattr);
1da177e4
LT		 2826 return status;
2827}
2828
2829static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2830{
2831 struct nfs4_exception exception = { };
2832 int err;
2833 do {
2834 err = nfs4_handle_exception(NFS_SERVER(inode),
2835 _nfs4_proc_access(inode, entry),
2836 &exception);
2837 } while (exception.retry);
2838 return err;
2839}
2840
2841/*
2842 * TODO: For the time being, we don't try to get any attributes
2843 * along with any of the zero-copy operations READ, READDIR,
2844 * READLINK, WRITE.
2845 *
2846 * In the case of the first three, we want to put the GETATTR
2847 * after the read-type operation -- this is because it is hard
2848 * to predict the length of a GETATTR response in v4, and thus
2849 * align the READ data correctly. This means that the GETATTR
2850 * may end up partially falling into the page cache, and we should
2851 * shift it into the 'tail' of the xdr_buf before processing.
2852 * To do this efficiently, we need to know the total length
2853 * of data received, which doesn't seem to be available outside
2854 * of the RPC layer.
2855 *
2856 * In the case of WRITE, we also want to put the GETATTR after
2857 * the operation -- in this case because we want to make sure
140150db 2858 * we get the post-operation mtime and size.
1da177e4
LT		 2859 *
2860 * Both of these changes to the XDR layer would in fact be quite
2861 * minor, but I decided to leave them for a subsequent patch.
2862 */
2863static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2864 unsigned int pgbase, unsigned int pglen)
2865{
2866 struct nfs4_readlink args = {
2867 .fh = NFS_FH(inode),
2868 .pgbase = pgbase,
2869 .pglen = pglen,
2870 .pages = &page,
2871 };
f50c7000 2872 struct nfs4_readlink_res res;
1da177e4
LT		 2873 struct rpc_message msg = {
2874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2875 .rpc_argp = &args,
f50c7000 2876 .rpc_resp = &res,
1da177e4
LT		 2877 };
2878
7c513058 2879 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2880}
2881
2882static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2883 unsigned int pgbase, unsigned int pglen)
2884{
2885 struct nfs4_exception exception = { };
2886 int err;
2887 do {
2888 err = nfs4_handle_exception(NFS_SERVER(inode),
2889 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2890 &exception);
2891 } while (exception.retry);
2892 return err;
2893}
2894
1da177e4 2895/*
8867fe58 2896 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2897 */
1da177e4
LT		 2898static int
2899nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2900 int flags)
1da177e4 2901{
8867fe58 2902 struct nfs_open_context *ctx;
1da177e4 2903 struct nfs4_state *state;
1da177e4
LT		 2904 int status = 0;
2905
8867fe58
MS		 2906 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2907 if (IS_ERR(ctx))
2908 return PTR_ERR(ctx);
2909
a8a5da99 2910 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2911 state = nfs4_do_open(dir, dentry, ctx->mode,
2912 flags, sattr, ctx->cred,
2913 &ctx->mdsthreshold);
d4d9cdcb 2914 d_drop(dentry);
1da177e4
LT		 2915 if (IS_ERR(state)) {
2916 status = PTR_ERR(state);
c0204fd2 2917 goto out;
1da177e4 2918 }
d4d9cdcb 2919 d_add(dentry, igrab(state->inode));
d75340cc 2920 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2921 ctx->state = state;
1da177e4 2922out:
8867fe58 2923 put_nfs_open_context(ctx);
1da177e4
LT		 2924 return status;
2925}
2926
2927static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2928{
16e42959 2929 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2930 struct nfs_removeargs args = {
1da177e4 2931 .fh = NFS_FH(dir),
26fe5750 2932 .name = *name,
16e42959 2933 };
4fdc17b2 2934 struct nfs_removeres res = {
16e42959 2935 .server = server,
1da177e4 2936 };
1da177e4 2937 struct rpc_message msg = {
4fdc17b2
TM		 2938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2939 .rpc_argp = &args,
2940 .rpc_resp = &res,
1da177e4 2941 };
778d2817 2942 int status;
1da177e4 2943
7c513058 2944 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2945 if (status == 0)
16e42959 2946 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2947 return status;
2948}
2949
2950static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2951{
2952 struct nfs4_exception exception = { };
2953 int err;
2954 do {
2955 err = nfs4_handle_exception(NFS_SERVER(dir),
2956 _nfs4_proc_remove(dir, name),
2957 &exception);
2958 } while (exception.retry);
2959 return err;
2960}
2961
e4eff1a6 2962static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2963{
e4eff1a6
TM		 2964 struct nfs_server *server = NFS_SERVER(dir);
2965 struct nfs_removeargs *args = msg->rpc_argp;
2966 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2967
e4eff1a6 2968 res->server = server;
1da177e4 2969 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2970 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2971}
2972
34e137cc
BS		 2973static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2974{
2975 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2976 &data->args.seq_args,
2977 &data->res.seq_res,
2978 task))
2979 return;
2980 rpc_call_start(task);
1da177e4
LT		 2981}
2982
e4eff1a6 2983static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2984{
e4eff1a6
TM		 2985 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2986
14516c3a
TM		 2987 if (!nfs4_sequence_done(task, &res->seq_res))
2988 return 0;
9e33bed5 2989 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2990 return 0;
2991 update_changeattr(dir, &res->cinfo);
e4eff1a6 2992 return 1;
1da177e4
LT		 2993}
2994
d3d4152a
JL		 2995static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2996{
2997 struct nfs_server *server = NFS_SERVER(dir);
2998 struct nfs_renameargs *arg = msg->rpc_argp;
2999 struct nfs_renameres *res = msg->rpc_resp;
3000
3001 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3002 res->server = server;
9d12b216 3003 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3004}
3005
c6bfa1a1
BS		 3006static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3007{
3008 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3009 &data->args.seq_args,
3010 &data->res.seq_res,
3011 task))
3012 return;
3013 rpc_call_start(task);
d3d4152a
JL		 3014}
3015
3016static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3017 struct inode *new_dir)
3018{
3019 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3020
3021 if (!nfs4_sequence_done(task, &res->seq_res))
3022 return 0;
3023 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3024 return 0;
3025
3026 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3027 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3028 return 1;
3029}
3030
1da177e4
LT		 3031static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3032 struct inode *new_dir, struct qstr *new_name)
3033{
6caf2c82 3034 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3035 struct nfs_renameargs arg = {
1da177e4
LT		 3036 .old_dir = NFS_FH(old_dir),
3037 .new_dir = NFS_FH(new_dir),
3038 .old_name = old_name,
3039 .new_name = new_name,
6caf2c82 3040 };
e8582a8b 3041 struct nfs_renameres res = {
6caf2c82 3042 .server = server,
1da177e4 3043 };
1da177e4
LT		 3044 struct rpc_message msg = {
3045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3046 .rpc_argp = &arg,
3047 .rpc_resp = &res,
3048 };
011fff72 3049 int status = -ENOMEM;
1da177e4 3050
7c513058 3051 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3052 if (!status) {
3053 update_changeattr(old_dir, &res.old_cinfo);
3054 update_changeattr(new_dir, &res.new_cinfo);
3055 }
3056 return status;
3057}
3058
3059static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3060 struct inode *new_dir, struct qstr *new_name)
3061{
3062 struct nfs4_exception exception = { };
3063 int err;
3064 do {
3065 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3066 _nfs4_proc_rename(old_dir, old_name,
3067 new_dir, new_name),
3068 &exception);
3069 } while (exception.retry);
3070 return err;
3071}
3072
3073static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3074{
91ba2eee 3075 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3076 struct nfs4_link_arg arg = {
3077 .fh = NFS_FH(inode),
3078 .dir_fh = NFS_FH(dir),
3079 .name = name,
91ba2eee
TM		 3080 .bitmask = server->attr_bitmask,
3081 };
91ba2eee
TM		 3082 struct nfs4_link_res res = {
3083 .server = server,
1da177e4 3084 };
1da177e4
LT		 3085 struct rpc_message msg = {
3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3087 .rpc_argp = &arg,
91ba2eee 3088 .rpc_resp = &res,
1da177e4 3089 };
136f2627
TM		 3090 int status = -ENOMEM;
3091
3092 res.fattr = nfs_alloc_fattr();
778d2817 3093 if (res.fattr == NULL)
136f2627 3094 goto out;
1da177e4 3095
7c513058 3096 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3097 if (!status) {
3098 update_changeattr(dir, &res.cinfo);
73a3d07c 3099 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3100 }
136f2627 3101out:
136f2627 3102 nfs_free_fattr(res.fattr);
1da177e4
LT		 3103 return status;
3104}
3105
3106static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3107{
3108 struct nfs4_exception exception = { };
3109 int err;
3110 do {
3111 err = nfs4_handle_exception(NFS_SERVER(inode),
3112 _nfs4_proc_link(inode, dir, name),
3113 &exception);
3114 } while (exception.retry);
3115 return err;
3116}
3117
57dc9a57
TM		 3118struct nfs4_createdata {
3119 struct rpc_message msg;
3120 struct nfs4_create_arg arg;
3121 struct nfs4_create_res res;
3122 struct nfs_fh fh;
3123 struct nfs_fattr fattr;
57dc9a57
TM		 3124};
3125
3126static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3127 struct qstr *name, struct iattr *sattr, u32 ftype)
3128{
3129 struct nfs4_createdata *data;
3130
3131 data = kzalloc(sizeof(*data), GFP_KERNEL);
3132 if (data != NULL) {
3133 struct nfs_server *server = NFS_SERVER(dir);
3134
3135 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3136 data->msg.rpc_argp = &data->arg;
3137 data->msg.rpc_resp = &data->res;
3138 data->arg.dir_fh = NFS_FH(dir);
3139 data->arg.server = server;
3140 data->arg.name = name;
3141 data->arg.attrs = sattr;
3142 data->arg.ftype = ftype;
3143 data->arg.bitmask = server->attr_bitmask;
3144 data->res.server = server;
3145 data->res.fh = &data->fh;
3146 data->res.fattr = &data->fattr;
57dc9a57 3147 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3148 }
3149 return data;
3150}
3151
3152static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3153{
7c513058 3154 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3155 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3156 if (status == 0) {
3157 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3158 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3159 }
3160 return status;
3161}
3162
3163static void nfs4_free_createdata(struct nfs4_createdata *data)
3164{
3165 kfree(data);
3166}
3167
4f390c15 3168static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3169 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3170{
57dc9a57
TM		 3171 struct nfs4_createdata *data;
3172 int status = -ENAMETOOLONG;
1da177e4 3173
94a6d753 3174 if (len > NFS4_MAXPATHLEN)
57dc9a57 3175 goto out;
4f390c15 3176
57dc9a57
TM		 3177 status = -ENOMEM;
3178 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3179 if (data == NULL)
3180 goto out;
3181
3182 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3183 data->arg.u.symlink.pages = &page;
3184 data->arg.u.symlink.len = len;
1da177e4 3185
57dc9a57
TM		 3186 status = nfs4_do_create(dir, dentry, data);
3187
3188 nfs4_free_createdata(data);
3189out:
1da177e4
LT		 3190 return status;
3191}
3192
4f390c15 3193static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3194 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3195{
3196 struct nfs4_exception exception = { };
3197 int err;
3198 do {
3199 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3200 _nfs4_proc_symlink(dir, dentry, page,
3201 len, sattr),
1da177e4
LT		 3202 &exception);
3203 } while (exception.retry);
3204 return err;
3205}
3206
3207static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3208 struct iattr *sattr)
3209{
57dc9a57
TM		 3210 struct nfs4_createdata *data;
3211 int status = -ENOMEM;
1da177e4 3212
57dc9a57
TM		 3213 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3214 if (data == NULL)
3215 goto out;
3216
3217 status = nfs4_do_create(dir, dentry, data);
3218
3219 nfs4_free_createdata(data);
3220out:
1da177e4
LT		 3221 return status;
3222}
3223
3224static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3225 struct iattr *sattr)
3226{
3227 struct nfs4_exception exception = { };
3228 int err;
a8a5da99
AK		 3229
3230 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3231 do {
3232 err = nfs4_handle_exception(NFS_SERVER(dir),
3233 _nfs4_proc_mkdir(dir, dentry, sattr),
3234 &exception);
3235 } while (exception.retry);
3236 return err;
3237}
3238
3239static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3240 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3241{
3242 struct inode *dir = dentry->d_inode;
3243 struct nfs4_readdir_arg args = {
3244 .fh = NFS_FH(dir),
56e4ebf8 3245 .pages = pages,
1da177e4
LT		 3246 .pgbase = 0,
3247 .count = count,
96d25e53 3248 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3249 .plus = plus,
1da177e4
LT		 3250 };
3251 struct nfs4_readdir_res res;
3252 struct rpc_message msg = {
3253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3254 .rpc_argp = &args,
3255 .rpc_resp = &res,
3256 .rpc_cred = cred,
3257 };
3258 int status;
3259
3110ff80 3260 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3261 dentry->d_parent->d_name.name,
3262 dentry->d_name.name,
3263 (unsigned long long)cookie);
c3f52af3 3264 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3265 res.pgbase = args.pgbase;
7c513058 3266 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3267 if (status >= 0) {
c3f52af3 3268 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3269 status += args.pgbase;
3270 }
c4812998
TM		 3271
3272 nfs_invalidate_atime(dir);
3273
3110ff80 3274 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3275 return status;
3276}
3277
3278static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3279 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3280{
3281 struct nfs4_exception exception = { };
3282 int err;
3283 do {
3284 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3285 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3286 pages, count, plus),
1da177e4
LT		 3287 &exception);
3288 } while (exception.retry);
3289 return err;
3290}
3291
3292static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3293 struct iattr *sattr, dev_t rdev)
3294{
57dc9a57
TM		 3295 struct nfs4_createdata *data;
3296 int mode = sattr->ia_mode;
3297 int status = -ENOMEM;
1da177e4
LT		 3298
3299 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3300 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3301
3302 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3303 if (data == NULL)
3304 goto out;
3305
1da177e4 3306 if (S_ISFIFO(mode))
57dc9a57 3307 data->arg.ftype = NF4FIFO;
1da177e4 3308 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3309 data->arg.ftype = NF4BLK;
3310 data->arg.u.device.specdata1 = MAJOR(rdev);
3311 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3312 }
3313 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3314 data->arg.ftype = NF4CHR;
3315 data->arg.u.device.specdata1 = MAJOR(rdev);
3316 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3317 }
1da177e4 3318
57dc9a57
TM		 3319 status = nfs4_do_create(dir, dentry, data);
3320
3321 nfs4_free_createdata(data);
3322out:
1da177e4
LT		 3323 return status;
3324}
3325
3326static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3327 struct iattr *sattr, dev_t rdev)
3328{
3329 struct nfs4_exception exception = { };
3330 int err;
a8a5da99
AK		 3331
3332 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3333 do {
3334 err = nfs4_handle_exception(NFS_SERVER(dir),
3335 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3336 &exception);
3337 } while (exception.retry);
3338 return err;
3339}
3340
3341static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3342 struct nfs_fsstat *fsstat)
3343{
3344 struct nfs4_statfs_arg args = {
3345 .fh = fhandle,
3346 .bitmask = server->attr_bitmask,
3347 };
24ad148a
BH		 3348 struct nfs4_statfs_res res = {
3349 .fsstat = fsstat,
3350 };
1da177e4
LT		 3351 struct rpc_message msg = {
3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3353 .rpc_argp = &args,
24ad148a 3354 .rpc_resp = &res,
1da177e4
LT		 3355 };
3356
0e574af1 3357 nfs_fattr_init(fsstat->fattr);
7c513058 3358 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3359}
3360
3361static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3362{
3363 struct nfs4_exception exception = { };
3364 int err;
3365 do {
3366 err = nfs4_handle_exception(server,
3367 _nfs4_proc_statfs(server, fhandle, fsstat),
3368 &exception);
3369 } while (exception.retry);
3370 return err;
3371}
3372
3373static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3374 struct nfs_fsinfo *fsinfo)
3375{
3376 struct nfs4_fsinfo_arg args = {
3377 .fh = fhandle,
3378 .bitmask = server->attr_bitmask,
3379 };
3dda5e43
BH		 3380 struct nfs4_fsinfo_res res = {
3381 .fsinfo = fsinfo,
3382 };
1da177e4
LT		 3383 struct rpc_message msg = {
3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3385 .rpc_argp = &args,
3dda5e43 3386 .rpc_resp = &res,
1da177e4
LT		 3387 };
3388
7c513058 3389 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3390}
3391
3392static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3393{
3394 struct nfs4_exception exception = { };
3395 int err;
3396
3397 do {
3398 err = nfs4_handle_exception(server,
3399 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3400 &exception);
3401 } while (exception.retry);
3402 return err;
3403}
3404
3405static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3406{
e38eb650
BS		 3407 int error;
3408
0e574af1 3409 nfs_fattr_init(fsinfo->fattr);
e38eb650 3410 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3411 if (error == 0) {
3412 /* block layout checks this! */
3413 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3414 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3415 }
e38eb650
BS		 3416
3417 return error;
1da177e4
LT		 3418}
3419
3420static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3421 struct nfs_pathconf *pathconf)
3422{
3423 struct nfs4_pathconf_arg args = {
3424 .fh = fhandle,
3425 .bitmask = server->attr_bitmask,
3426 };
d45b2989
BH		 3427 struct nfs4_pathconf_res res = {
3428 .pathconf = pathconf,
3429 };
1da177e4
LT		 3430 struct rpc_message msg = {
3431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3432 .rpc_argp = &args,
d45b2989 3433 .rpc_resp = &res,
1da177e4
LT		 3434 };
3435
3436 /* None of the pathconf attributes are mandatory to implement */
3437 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3438 memset(pathconf, 0, sizeof(*pathconf));
3439 return 0;
3440 }
3441
0e574af1 3442 nfs_fattr_init(pathconf->fattr);
7c513058 3443 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3444}
3445
3446static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3447 struct nfs_pathconf *pathconf)
3448{
3449 struct nfs4_exception exception = { };
3450 int err;
3451
3452 do {
3453 err = nfs4_handle_exception(server,
3454 _nfs4_proc_pathconf(server, fhandle, pathconf),
3455 &exception);
3456 } while (exception.retry);
3457 return err;
3458}
3459
d20581aa
BH		 3460void __nfs4_read_done_cb(struct nfs_read_data *data)
3461{
cd841605 3462 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3463}
3464
cbdabc7f 3465static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3466{
cd841605 3467 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3468
9e33bed5 3469 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3470 rpc_restart_call_prepare(task);
ec06c096 3471 return -EAGAIN;
1da177e4 3472 }
8850df99 3473
d20581aa 3474 __nfs4_read_done_cb(data);
1da177e4 3475 if (task->tk_status > 0)
ec06c096
TM		 3476 renew_lease(server, data->timestamp);
3477 return 0;
1da177e4
LT		 3478}
3479
cbdabc7f
AA		 3480static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3481{
3482
3483 dprintk("--> %s\n", __func__);
3484
3485 if (!nfs4_sequence_done(task, &data->res.seq_res))
3486 return -EAGAIN;
3487
d20581aa
BH		 3488 return data->read_done_cb ? data->read_done_cb(task, data) :
3489 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3490}
3491
bdc7f021 3492static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3493{
1da177e4 3494 data->timestamp = jiffies;
cbdabc7f 3495 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3496 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3497 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3498}
3499
ea7c3303
BS		 3500static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3501{
cd841605 3502 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3503 &data->args.seq_args,
3504 &data->res.seq_res,
3505 task))
3506 return;
3507 rpc_call_start(task);
1da177e4
LT		 3508}
3509
b029bc9b 3510static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3511{
cd841605 3512 struct inode *inode = data->header->inode;
1da177e4 3513
9e33bed5 3514 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3515 rpc_restart_call_prepare(task);
788e7a89 3516 return -EAGAIN;
1da177e4 3517 }
4f9838c7 3518 if (task->tk_status >= 0) {
1da177e4 3519 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3520 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3521 }
788e7a89 3522 return 0;
1da177e4
LT		 3523}
3524
b029bc9b
FI		 3525static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3526{
3527 if (!nfs4_sequence_done(task, &data->res.seq_res))
3528 return -EAGAIN;
d20581aa
BH		 3529 return data->write_done_cb ? data->write_done_cb(task, data) :
3530 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3531}
3532
5a37f851
TM		 3533static
3534bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3535{
5a37f851
TM		 3536 const struct nfs_pgio_header *hdr = data->header;
3537
3538 /* Don't request attributes for pNFS or O_DIRECT writes */
3539 if (data->ds_clp != NULL || hdr->dreq != NULL)
3540 return false;
3541 /* Otherwise, request attributes if and only if we don't hold
3542 * a delegation
3543 */
011e2a7f 3544 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3545}
a69aef14 3546
bdc7f021 3547static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3548{
cd841605 3549 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3550
5a37f851 3551 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3552 data->args.bitmask = NULL;
3553 data->res.fattr = NULL;
3554 } else
3555 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3556
b029bc9b
FI		 3557 if (!data->write_done_cb)
3558 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3559 data->res.server = server;
1da177e4
LT		 3560 data->timestamp = jiffies;
3561
bdc7f021 3562 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3563 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3564}
3565
c6cb80d0
BS		 3566static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3567{
cd841605 3568 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3569 &data->args.seq_args,
3570 &data->res.seq_res,
3571 task))
3572 return;
3573 rpc_call_start(task);
1da177e4
LT		 3574}
3575
0b7c0153 3576static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3577{
3578 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3579 &data->args.seq_args,
3580 &data->res.seq_res,
3581 task))
3582 return;
3583 rpc_call_start(task);
1da177e4
LT		 3584}
3585
0b7c0153 3586static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3587{
1da177e4 3588 struct inode *inode = data->inode;
14516c3a 3589
9e33bed5 3590 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3591 rpc_restart_call_prepare(task);
788e7a89 3592 return -EAGAIN;
1da177e4 3593 }
788e7a89 3594 return 0;
1da177e4
LT		 3595}
3596
0b7c0153 3597static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3598{
3599 if (!nfs4_sequence_done(task, &data->res.seq_res))
3600 return -EAGAIN;
0b7c0153 3601 return data->commit_done_cb(task, data);
5f452431
FI		 3602}
3603
0b7c0153 3604static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3605{
788e7a89 3606 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3607
0b7c0153
FI		 3608 if (data->commit_done_cb == NULL)
3609 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3610 data->res.server = server;
bdc7f021 3611 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3612 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3613}
3614
9bc4e3ca
CL		 3615struct nfs4_renewdata {
3616 struct nfs_client *client;
3617 unsigned long timestamp;
3618};
3619
1da177e4
LT		 3620/*
3621 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3622 * standalone procedure for queueing an asynchronous RENEW.
3623 */
9bc4e3ca 3624static void nfs4_renew_release(void *calldata)
dc96aef9 3625{
9bc4e3ca
CL		 3626 struct nfs4_renewdata *data = calldata;
3627 struct nfs_client *clp = data->client;
dc96aef9 3628
0851de06
AB		 3629 if (atomic_read(&clp->cl_count) > 1)
3630 nfs4_schedule_state_renewal(clp);
3631 nfs_put_client(clp);
9bc4e3ca 3632 kfree(data);
dc96aef9
AB		 3633}
3634
9bc4e3ca 3635static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3636{
9bc4e3ca
CL		 3637 struct nfs4_renewdata *data = calldata;
3638 struct nfs_client *clp = data->client;
3639 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3640
3641 if (task->tk_status < 0) {
95baa25c 3642 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3643 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3644 return;
3645 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3646 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3647 return;
3648 }
3649 nfs4_schedule_path_down_recovery(clp);
1da177e4 3650 }
452e9352 3651 do_renew_lease(clp, timestamp);
1da177e4
LT		 3652}
3653
963d8fe5
TM		 3654static const struct rpc_call_ops nfs4_renew_ops = {
3655 .rpc_call_done = nfs4_renew_done,
dc96aef9 3656 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3657};
3658
2f60ea6b 3659static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3660{
3661 struct rpc_message msg = {
3662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3663 .rpc_argp = clp,
b4454fe1 3664 .rpc_cred = cred,
1da177e4 3665 };
9bc4e3ca 3666 struct nfs4_renewdata *data;
1da177e4 3667
2f60ea6b
TM		 3668 if (renew_flags == 0)
3669 return 0;
0851de06
AB		 3670 if (!atomic_inc_not_zero(&clp->cl_count))
3671 return -EIO;
b569ad34 3672 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3673 if (data == NULL)
3674 return -ENOMEM;
3675 data->client = clp;
3676 data->timestamp = jiffies;
1da177e4 3677 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3678 &nfs4_renew_ops, data);
1da177e4
LT		 3679}
3680
8534d4ec 3681static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3682{
3683 struct rpc_message msg = {
3684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3685 .rpc_argp = clp,
b4454fe1 3686 .rpc_cred = cred,
1da177e4
LT		 3687 };
3688 unsigned long now = jiffies;
3689 int status;
3690
3691 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3692 if (status < 0)
3693 return status;
452e9352 3694 do_renew_lease(clp, now);
1da177e4
LT		 3695 return 0;
3696}
3697
aa1870af
BF		 3698static inline int nfs4_server_supports_acls(struct nfs_server *server)
3699{
3700 return (server->caps & NFS_CAP_ACLS)
3701 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3702 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3703}
3704
21f498c2
TM		 3705/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3706 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3707 * the stack.
3708 */
21f498c2 3709#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3710
e9e3d724
NH		 3711static int buf_to_pages_noslab(const void *buf, size_t buflen,
3712 struct page **pages, unsigned int *pgbase)
3713{
3714 struct page *newpage, **spages;
3715 int rc = 0;
3716 size_t len;
3717 spages = pages;
3718
3719 do {
21f498c2 3720 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3721 newpage = alloc_page(GFP_KERNEL);
3722
3723 if (newpage == NULL)
3724 goto unwind;
3725 memcpy(page_address(newpage), buf, len);
3726 buf += len;
3727 buflen -= len;
3728 *pages++ = newpage;
3729 rc++;
3730 } while (buflen != 0);
3731
3732 return rc;
3733
3734unwind:
3735 for(; rc > 0; rc--)
3736 __free_page(spages[rc-1]);
3737 return -ENOMEM;
3738}
3739
e50a1c2e
BF		 3740struct nfs4_cached_acl {
3741 int cached;
3742 size_t len;
3e9d4154 3743 char data[0];
e50a1c2e
BF		 3744};
3745
3746static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3747{
3748 struct nfs_inode *nfsi = NFS_I(inode);
3749
3750 spin_lock(&inode->i_lock);
3751 kfree(nfsi->nfs4_acl);
3752 nfsi->nfs4_acl = acl;
3753 spin_unlock(&inode->i_lock);
3754}
3755
3756static void nfs4_zap_acl_attr(struct inode *inode)
3757{
3758 nfs4_set_cached_acl(inode, NULL);
3759}
3760
3761static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3762{
3763 struct nfs_inode *nfsi = NFS_I(inode);
3764 struct nfs4_cached_acl *acl;
3765 int ret = -ENOENT;
3766
3767 spin_lock(&inode->i_lock);
3768 acl = nfsi->nfs4_acl;
3769 if (acl == NULL)
3770 goto out;
3771 if (buf == NULL) /* user is just asking for length */
3772 goto out_len;
3773 if (acl->cached == 0)
3774 goto out;
3775 ret = -ERANGE; /* see getxattr(2) man page */
3776 if (acl->len > buflen)
3777 goto out;
3778 memcpy(buf, acl->data, acl->len);
3779out_len:
3780 ret = acl->len;
3781out:
3782 spin_unlock(&inode->i_lock);
3783 return ret;
3784}
3785
5794d21e 3786static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3787{
3788 struct nfs4_cached_acl *acl;
b291f1b1 3789 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3790
1f1ea6c2 3791 if (buflen <= PAGE_SIZE) {
b291f1b1 3792 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3793 if (acl == NULL)
3794 goto out;
3795 acl->cached = 1;
5794d21e 3796 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3797 } else {
3798 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3799 if (acl == NULL)
3800 goto out;
3801 acl->cached = 0;
3802 }
3803 acl->len = acl_len;
3804out:
3805 nfs4_set_cached_acl(inode, acl);
3806}
3807
bf118a34
AA		 3808/*
3809 * The getxattr API returns the required buffer length when called with a
3810 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3811 * the required buf. On a NULL buf, we send a page of data to the server
3812 * guessing that the ACL request can be serviced by a page. If so, we cache
3813 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3814 * the cache. If not so, we throw away the page, and cache the required
3815 * length. The next getxattr call will then produce another round trip to
3816 * the server, this time with the input buf of the required size.
3817 */
16b4289c 3818static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3819{
bf118a34 3820 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3821 struct nfs_getaclargs args = {
3822 .fh = NFS_FH(inode),
3823 .acl_pages = pages,
3824 .acl_len = buflen,
3825 };
663c79b3
BH		 3826 struct nfs_getaclres res = {
3827 .acl_len = buflen,
3828 };
aa1870af
BF		 3829 struct rpc_message msg = {
3830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3831 .rpc_argp = &args,
663c79b3 3832 .rpc_resp = &res,
aa1870af 3833 };
21f498c2
TM		 3834 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3835 int ret = -ENOMEM, i;
aa1870af 3836
bf118a34
AA		 3837 /* As long as we're doing a round trip to the server anyway,
3838 * let's be prepared for a page of acl data. */
3839 if (npages == 0)
3840 npages = 1;
21f498c2
TM		 3841 if (npages > ARRAY_SIZE(pages))
3842 return -ERANGE;
5a006899 3843
bf118a34
AA		 3844 for (i = 0; i < npages; i++) {
3845 pages[i] = alloc_page(GFP_KERNEL);
3846 if (!pages[i])
3847 goto out_free;
e50a1c2e 3848 }
5a006899
SP		 3849
3850 /* for decoding across pages */
3851 res.acl_scratch = alloc_page(GFP_KERNEL);
3852 if (!res.acl_scratch)
3853 goto out_free;
3854
bf118a34
AA		 3855 args.acl_len = npages * PAGE_SIZE;
3856 args.acl_pgbase = 0;
5a006899 3857
de040bec 3858 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3859 __func__, buf, buflen, npages, args.acl_len);
3860 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3861 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3862 if (ret)
3863 goto out_free;
bf118a34 3864
1f1ea6c2
TM		 3865 /* Handle the case where the passed-in buffer is too short */
3866 if (res.acl_flags & NFS4_ACL_TRUNC) {
3867 /* Did the user only issue a request for the acl length? */
3868 if (buf == NULL)
3869 goto out_ok;
e50a1c2e 3870 ret = -ERANGE;
1f1ea6c2 3871 goto out_free;
e50a1c2e 3872 }
1f1ea6c2
TM		 3873 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3874 if (buf)
3875 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3876out_ok:
3877 ret = res.acl_len;
e50a1c2e 3878out_free:
bf118a34
AA		 3879 for (i = 0; i < npages; i++)
3880 if (pages[i])
3881 __free_page(pages[i]);
331818f1
TM		 3882 if (res.acl_scratch)
3883 __free_page(res.acl_scratch);
aa1870af
BF		 3884 return ret;
3885}
3886
16b4289c
TM		 3887static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3888{
3889 struct nfs4_exception exception = { };
3890 ssize_t ret;
3891 do {
3892 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3893 if (ret >= 0)
3894 break;
3895 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3896 } while (exception.retry);
3897 return ret;
3898}
3899
e50a1c2e
BF		 3900static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3901{
3902 struct nfs_server *server = NFS_SERVER(inode);
3903 int ret;
3904
3905 if (!nfs4_server_supports_acls(server))
3906 return -EOPNOTSUPP;
3907 ret = nfs_revalidate_inode(server, inode);
3908 if (ret < 0)
3909 return ret;
08a22b39
AK		 3910 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3911 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3912 ret = nfs4_read_cached_acl(inode, buf, buflen);
3913 if (ret != -ENOENT)
bf118a34
AA		 3914 /* -ENOENT is returned if there is no ACL or if there is an ACL
3915 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3916 return ret;
3917 return nfs4_get_acl_uncached(inode, buf, buflen);
3918}
3919
16b4289c 3920static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3921{
3922 struct nfs_server *server = NFS_SERVER(inode);
3923 struct page *pages[NFS4ACL_MAXPAGES];
3924 struct nfs_setaclargs arg = {
3925 .fh = NFS_FH(inode),
3926 .acl_pages = pages,
3927 .acl_len = buflen,
3928 };
73c403a9 3929 struct nfs_setaclres res;
4b580ee3
BF		 3930 struct rpc_message msg = {
3931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3932 .rpc_argp = &arg,
73c403a9 3933 .rpc_resp = &res,
4b580ee3 3934 };
21f498c2 3935 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3936 int ret, i;
4b580ee3
BF		 3937
3938 if (!nfs4_server_supports_acls(server))
3939 return -EOPNOTSUPP;
21f498c2
TM		 3940 if (npages > ARRAY_SIZE(pages))
3941 return -ERANGE;
e9e3d724
NH		 3942 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3943 if (i < 0)
3944 return i;
57ec14c5 3945 nfs4_inode_return_delegation(inode);
7c513058 3946 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3947
3948 /*
3949 * Free each page after tx, so the only ref left is
3950 * held by the network stack
3951 */
3952 for (; i > 0; i--)
3953 put_page(pages[i-1]);
3954
08a22b39
AK		 3955 /*
3956 * Acl update can result in inode attribute update.
3957 * so mark the attribute cache invalid.
3958 */
3959 spin_lock(&inode->i_lock);
3960 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3961 spin_unlock(&inode->i_lock);
f41f7418
TM		 3962 nfs_access_zap_cache(inode);
3963 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3964 return ret;
3965}
3966
16b4289c
TM		 3967static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3968{
3969 struct nfs4_exception exception = { };
3970 int err;
3971 do {
3972 err = nfs4_handle_exception(NFS_SERVER(inode),
3973 __nfs4_proc_set_acl(inode, buf, buflen),
3974 &exception);
3975 } while (exception.retry);
3976 return err;
3977}
3978
1da177e4 3979static int
aa5190d0 3980nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3981{
aa5190d0
TM		 3982 struct nfs_client *clp = server->nfs_client;
3983
3984 if (task->tk_status >= 0)
1da177e4
LT		 3985 return 0;
3986 switch(task->tk_status) {
a1d0b5ee 3987 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3988 case -NFS4ERR_ADMIN_REVOKED:
3989 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3990 if (state == NULL)
3991 break;
3992 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3993 case -NFS4ERR_OPENMODE:
3994 if (state == NULL)
3995 break;
0400a6b0
TM		 3996 nfs4_schedule_stateid_recovery(server, state);
3997 goto wait_on_recovery;
0ced63d1
TM		 3998 case -NFS4ERR_EXPIRED:
3999 if (state != NULL)
4000 nfs4_schedule_stateid_recovery(server, state);
1da177e4 4001 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4002 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4003 nfs4_schedule_lease_recovery(clp);
4004 goto wait_on_recovery;
4745e315
AA		 4005#if defined(CONFIG_NFS_V4_1)
4006 case -NFS4ERR_BADSESSION:
4007 case -NFS4ERR_BADSLOT:
4008 case -NFS4ERR_BAD_HIGH_SLOT:
4009 case -NFS4ERR_DEADSESSION:
4010 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4011 case -NFS4ERR_SEQ_FALSE_RETRY:
4012 case -NFS4ERR_SEQ_MISORDERED:
4013 dprintk("%s ERROR %d, Reset session\n", __func__,
4014 task->tk_status);
9f594791 4015 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4016 task->tk_status = 0;
4017 return -EAGAIN;
4018#endif /* CONFIG_NFS_V4_1 */
1da177e4 4019 case -NFS4ERR_DELAY:
aa5190d0 4020 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4021 case -NFS4ERR_GRACE:
2c643488 4022 case -EKEYEXPIRED:
1da177e4
LT		 4023 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4024 task->tk_status = 0;
4025 return -EAGAIN;
a8a4ae3a 4026 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4027 case -NFS4ERR_OLD_STATEID:
4028 task->tk_status = 0;
4029 return -EAGAIN;
4030 }
4031 task->tk_status = nfs4_map_errors(task->tk_status);
4032 return 0;
0400a6b0 4033wait_on_recovery:
a2c0b9e2 4034 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4035 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4036 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4037 task->tk_status = 0;
4038 return -EAGAIN;
1da177e4
LT		 4039}
4040
f092075d
CL		 4041static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4042 nfs4_verifier *bootverf)
cd93710e
CL		 4043{
4044 __be32 verf[2];
4045
2c820d9a
CL		 4046 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4047 /* An impossible timestamp guarantees this value
4048 * will never match a generated boot time. */
4049 verf[0] = 0;
4050 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4051 } else {
f092075d
CL		 4052 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4053 verf[0] = (__be32)nn->boot_time.tv_sec;
4054 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4055 }
cd93710e
CL		 4056 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4057}
4058
e984a55a
CL		 4059static unsigned int
4060nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4061 char *buf, size_t len)
4062{
4063 unsigned int result;
4064
4065 rcu_read_lock();
4066 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4067 clp->cl_ipaddr,
4068 rpc_peeraddr2str(clp->cl_rpcclient,
4069 RPC_DISPLAY_ADDR),
4070 rpc_peeraddr2str(clp->cl_rpcclient,
4071 RPC_DISPLAY_PROTO));
4072 rcu_read_unlock();
4073 return result;
4074}
4075
4076static unsigned int
4077nfs4_init_uniform_client_string(const struct nfs_client *clp,
4078 char *buf, size_t len)
4079{
6f2ea7f2
CL		 4080 char *nodename = clp->cl_rpcclient->cl_nodename;
4081
4082 if (nfs4_client_id_uniquifier[0] != '\0')
4083 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4084 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4085 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4086 nodename);
e984a55a
CL		 4087}
4088
6bbb4ae8
CL		 4089/**
4090 * nfs4_proc_setclientid - Negotiate client ID
4091 * @clp: state data structure
4092 * @program: RPC program for NFSv4 callback service
4093 * @port: IP port number for NFS4 callback service
4094 * @cred: RPC credential to use for this call
4095 * @res: where to place the result
4096 *
4097 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4098 */
bb8b27e5
TM		 4099int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4100 unsigned short port, struct rpc_cred *cred,
4101 struct nfs4_setclientid_res *res)
1da177e4
LT		 4102{
4103 nfs4_verifier sc_verifier;
4104 struct nfs4_setclientid setclientid = {
4105 .sc_verifier = &sc_verifier,
4106 .sc_prog = program,
f4eecd5d 4107 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4108 };
4109 struct rpc_message msg = {
4110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4111 .rpc_argp = &setclientid,
bb8b27e5 4112 .rpc_resp = res,
286d7d6a 4113 .rpc_cred = cred,
1da177e4 4114 };
6bbb4ae8 4115 int status;
1da177e4 4116
de734831 4117 /* nfs_client_id4 */
f092075d 4118 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4119 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4120 setclientid.sc_name_len =
4121 nfs4_init_uniform_client_string(clp,
4122 setclientid.sc_name,
4123 sizeof(setclientid.sc_name));
4124 else
4125 setclientid.sc_name_len =
4126 nfs4_init_nonuniform_client_string(clp,
4127 setclientid.sc_name,
4128 sizeof(setclientid.sc_name));
de734831 4129 /* cb_client4 */
e984a55a 4130 rcu_read_lock();
de734831 4131 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4132 sizeof(setclientid.sc_netid),
4133 rpc_peeraddr2str(clp->cl_rpcclient,
4134 RPC_DISPLAY_NETID));
de734831
CL		 4135 rcu_read_unlock();
4136 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4137 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4138 clp->cl_ipaddr, port >> 8, port & 255);
4139
6bbb4ae8
CL		 4140 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4141 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4142 setclientid.sc_name_len, setclientid.sc_name);
4143 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4144 dprintk("NFS reply setclientid: %d\n", status);
4145 return status;
1da177e4
LT		 4146}
4147
6bbb4ae8
CL		 4148/**
4149 * nfs4_proc_setclientid_confirm - Confirm client ID
4150 * @clp: state data structure
4151 * @res: result of a previous SETCLIENTID
4152 * @cred: RPC credential to use for this call
4153 *
4154 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4155 */
fd954ae1 4156int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4157 struct nfs4_setclientid_res *arg,
4158 struct rpc_cred *cred)
1da177e4
LT		 4159{
4160 struct nfs_fsinfo fsinfo;
4161 struct rpc_message msg = {
4162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4163 .rpc_argp = arg,
1da177e4 4164 .rpc_resp = &fsinfo,
286d7d6a 4165 .rpc_cred = cred,
1da177e4
LT		 4166 };
4167 unsigned long now;
4168 int status;
4169
6bbb4ae8
CL		 4170 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4171 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4172 clp->cl_clientid);
1da177e4 4173 now = jiffies;
1bd714f2 4174 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4175 if (status == 0) {
4176 spin_lock(&clp->cl_lock);
4177 clp->cl_lease_time = fsinfo.lease_time * HZ;
4178 clp->cl_last_renewal = now;
4179 spin_unlock(&clp->cl_lock);
4180 }
6bbb4ae8 4181 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4182 return status;
4183}
4184
fe650407
TM		 4185struct nfs4_delegreturndata {
4186 struct nfs4_delegreturnargs args;
fa178f29 4187 struct nfs4_delegreturnres res;
fe650407
TM		 4188 struct nfs_fh fh;
4189 nfs4_stateid stateid;
26e976a8 4190 unsigned long timestamp;
fa178f29 4191 struct nfs_fattr fattr;
fe650407
TM		 4192 int rpc_status;
4193};
4194
fe650407
TM		 4195static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4196{
4197 struct nfs4_delegreturndata *data = calldata;
938e1010 4198
14516c3a
TM		 4199 if (!nfs4_sequence_done(task, &data->res.seq_res))
4200 return;
938e1010 4201
79708861
RL		 4202 switch (task->tk_status) {
4203 case -NFS4ERR_STALE_STATEID:
4204 case -NFS4ERR_EXPIRED:
4205 case 0:
fa178f29 4206 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4207 break;
4208 default:
4209 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4210 -EAGAIN) {
d00c5d43 4211 rpc_restart_call_prepare(task);
79708861
RL		 4212 return;
4213 }
4214 }
4215 data->rpc_status = task->tk_status;
fe650407
TM		 4216}
4217
4218static void nfs4_delegreturn_release(void *calldata)
4219{
fe650407
TM		 4220 kfree(calldata);
4221}
4222
938e1010
AA		 4223#if defined(CONFIG_NFS_V4_1)
4224static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4225{
4226 struct nfs4_delegreturndata *d_data;
4227
4228 d_data = (struct nfs4_delegreturndata *)data;
4229
035168ab 4230 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4231 &d_data->args.seq_args,
9d12b216 4232 &d_data->res.seq_res, task))
938e1010
AA		 4233 return;
4234 rpc_call_start(task);
4235}
4236#endif /* CONFIG_NFS_V4_1 */
4237
c8d149f3 4238static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4239#if defined(CONFIG_NFS_V4_1)
4240 .rpc_call_prepare = nfs4_delegreturn_prepare,
4241#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4242 .rpc_call_done = nfs4_delegreturn_done,
4243 .rpc_release = nfs4_delegreturn_release,
4244};
4245
e6f81075 4246static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4247{
4248 struct nfs4_delegreturndata *data;
fa178f29 4249 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4250 struct rpc_task *task;
5138fde0
TM		 4251 struct rpc_message msg = {
4252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4253 .rpc_cred = cred,
4254 };
c970aa85
TM		 4255 struct rpc_task_setup task_setup_data = {
4256 .rpc_client = server->client,
5138fde0 4257 .rpc_message = &msg,
c970aa85
TM		 4258 .callback_ops = &nfs4_delegreturn_ops,
4259 .flags = RPC_TASK_ASYNC,
4260 };
e6f81075 4261 int status = 0;
fe650407 4262
8535b2be 4263 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4264 if (data == NULL)
4265 return -ENOMEM;
9d12b216 4266 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4267 data->args.fhandle = &data->fh;
4268 data->args.stateid = &data->stateid;
9e907fec 4269 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4270 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4271 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4272 data->res.fattr = &data->fattr;
4273 data->res.server = server;
5138fde0 4274 nfs_fattr_init(data->res.fattr);
26e976a8 4275 data->timestamp = jiffies;
fe650407
TM		 4276 data->rpc_status = 0;
4277
c970aa85 4278 task_setup_data.callback_data = data;
1174dd1f
TM		 4279 msg.rpc_argp = &data->args;
4280 msg.rpc_resp = &data->res;
c970aa85 4281 task = rpc_run_task(&task_setup_data);
7a1218a2 4282 if (IS_ERR(task))
fe650407 4283 return PTR_ERR(task);
e6f81075
TM		 4284 if (!issync)
4285 goto out;
fe650407 4286 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4287 if (status != 0)
4288 goto out;
4289 status = data->rpc_status;
e144cbcc
TM		 4290 if (status == 0)
4291 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4292 else
4293 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4294out:
e6b3c4db 4295 rpc_put_task(task);
fe650407 4296 return status;
1da177e4
LT		 4297}
4298
e6f81075 4299int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4300{
4301 struct nfs_server *server = NFS_SERVER(inode);
4302 struct nfs4_exception exception = { };
4303 int err;
4304 do {
e6f81075 4305 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4306 switch (err) {
4307 case -NFS4ERR_STALE_STATEID:
4308 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4309 case 0:
4310 return 0;
4311 }
4312 err = nfs4_handle_exception(server, err, &exception);
4313 } while (exception.retry);
4314 return err;
4315}
4316
4317#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4318#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4319
4320/*
4321 * sleep, with exponential backoff, and retry the LOCK operation.
4322 */
4323static unsigned long
4324nfs4_set_lock_task_retry(unsigned long timeout)
4325{
d310310c 4326 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4327 timeout <<= 1;
4328 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4329 return NFS4_LOCK_MAXTIMEOUT;
4330 return timeout;
4331}
4332
1da177e4
LT		 4333static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4334{
4335 struct inode *inode = state->inode;
4336 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4337 struct nfs_client *clp = server->nfs_client;
911d1aaf 4338 struct nfs_lockt_args arg = {
1da177e4 4339 .fh = NFS_FH(inode),
911d1aaf 4340 .fl = request,
1da177e4 4341 };
911d1aaf
TM		 4342 struct nfs_lockt_res res = {
4343 .denied = request,
1da177e4
LT		 4344 };
4345 struct rpc_message msg = {
4346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4347 .rpc_argp = &arg,
4348 .rpc_resp = &res,
4349 .rpc_cred = state->owner->so_cred,
4350 };
1da177e4
LT		 4351 struct nfs4_lock_state *lsp;
4352 int status;
4353
911d1aaf 4354 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4355 status = nfs4_set_lock_state(state, request);
4356 if (status != 0)
4357 goto out;
4358 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4359 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4360 arg.lock_owner.s_dev = server->s_dev;
7c513058 4361 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4362 switch (status) {
4363 case 0:
4364 request->fl_type = F_UNLCK;
4365 break;
4366 case -NFS4ERR_DENIED:
4367 status = 0;
1da177e4 4368 }
70cc6487 4369 request->fl_ops->fl_release_private(request);
8d0a8a9d 4370out:
1da177e4
LT		 4371 return status;
4372}
4373
4374static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4375{
4376 struct nfs4_exception exception = { };
4377 int err;
4378
4379 do {
4380 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4381 _nfs4_proc_getlk(state, cmd, request),
4382 &exception);
4383 } while (exception.retry);
4384 return err;
4385}
4386
4387static int do_vfs_lock(struct file *file, struct file_lock *fl)
4388{
4389 int res = 0;
4390 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4391 case FL_POSIX:
4392 res = posix_lock_file_wait(file, fl);
4393 break;
4394 case FL_FLOCK:
4395 res = flock_lock_file_wait(file, fl);
4396 break;
4397 default:
4398 BUG();
4399 }
1da177e4
LT		 4400 return res;
4401}
4402
faf5f49c 4403struct nfs4_unlockdata {
911d1aaf
TM		 4404 struct nfs_locku_args arg;
4405 struct nfs_locku_res res;
faf5f49c
TM		 4406 struct nfs4_lock_state *lsp;
4407 struct nfs_open_context *ctx;
911d1aaf
TM		 4408 struct file_lock fl;
4409 const struct nfs_server *server;
26e976a8 4410 unsigned long timestamp;
faf5f49c
TM		 4411};
4412
911d1aaf
TM		 4413static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4414 struct nfs_open_context *ctx,
4415 struct nfs4_lock_state *lsp,
4416 struct nfs_seqid *seqid)
4417{
4418 struct nfs4_unlockdata *p;
4419 struct inode *inode = lsp->ls_state->inode;
4420
8535b2be 4421 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4422 if (p == NULL)
4423 return NULL;
4424 p->arg.fh = NFS_FH(inode);
4425 p->arg.fl = &p->fl;
4426 p->arg.seqid = seqid;
c1d51931 4427 p->res.seqid = seqid;
911d1aaf
TM		 4428 p->arg.stateid = &lsp->ls_stateid;
4429 p->lsp = lsp;
4430 atomic_inc(&lsp->ls_count);
4431 /* Ensure we don't close file until we're done freeing locks! */
4432 p->ctx = get_nfs_open_context(ctx);
4433 memcpy(&p->fl, fl, sizeof(p->fl));
4434 p->server = NFS_SERVER(inode);
4435 return p;
4436}
4437
06f814a3 4438static void nfs4_locku_release_calldata(void *data)
faf5f49c 4439{
963d8fe5 4440 struct nfs4_unlockdata *calldata = data;
911d1aaf 4441 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4442 nfs4_put_lock_state(calldata->lsp);
4443 put_nfs_open_context(calldata->ctx);
4444 kfree(calldata);
faf5f49c
TM		 4445}
4446
963d8fe5 4447static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4448{
963d8fe5 4449 struct nfs4_unlockdata *calldata = data;
faf5f49c 4450
14516c3a
TM		 4451 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4452 return;
faf5f49c
TM		 4453 switch (task->tk_status) {
4454 case 0:
f597c537
TM		 4455 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4456 &calldata->res.stateid);
26e976a8 4457 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4458 break;
9e33bed5
TM		 4459 case -NFS4ERR_BAD_STATEID:
4460 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4461 case -NFS4ERR_STALE_STATEID:
4462 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4463 break;
4464 default:
9e33bed5 4465 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4466 rpc_restart_call_prepare(task);
faf5f49c 4467 }
faf5f49c
TM		 4468}
4469
4ce70ada 4470static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4471{
4ce70ada 4472 struct nfs4_unlockdata *calldata = data;
faf5f49c 4473
911d1aaf 4474 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4475 return;
795a88c9 4476 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4477 /* Note: exit _without_ running nfs4_locku_done */
4478 task->tk_action = NULL;
faf5f49c
TM		 4479 return;
4480 }
26e976a8 4481 calldata->timestamp = jiffies;
035168ab 4482 if (nfs4_setup_sequence(calldata->server,
a893693c 4483 &calldata->arg.seq_args,
9d12b216 4484 &calldata->res.seq_res, task))
a893693c 4485 return;
5138fde0 4486 rpc_call_start(task);
faf5f49c
TM		 4487}
4488
963d8fe5 4489static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4490 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4491 .rpc_call_done = nfs4_locku_done,
06f814a3 4492 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4493};
4494
a5d16a4d
TM		 4495static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4496 struct nfs_open_context *ctx,
4497 struct nfs4_lock_state *lsp,
4498 struct nfs_seqid *seqid)
4499{
4500 struct nfs4_unlockdata *data;
5138fde0
TM		 4501 struct rpc_message msg = {
4502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4503 .rpc_cred = ctx->cred,
4504 };
c970aa85
TM		 4505 struct rpc_task_setup task_setup_data = {
4506 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4507 .rpc_message = &msg,
c970aa85 4508 .callback_ops = &nfs4_locku_ops,
101070ca 4509 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4510 .flags = RPC_TASK_ASYNC,
4511 };
a5d16a4d 4512
137d6aca
FF		 4513 /* Ensure this is an unlock - when canceling a lock, the
4514 * canceled lock is passed in, and it won't be an unlock.
4515 */
4516 fl->fl_type = F_UNLCK;
4517
a5d16a4d
TM		 4518 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4519 if (data == NULL) {
4520 nfs_free_seqid(seqid);
4521 return ERR_PTR(-ENOMEM);
4522 }
4523
9d12b216 4524 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4525 msg.rpc_argp = &data->arg;
4526 msg.rpc_resp = &data->res;
c970aa85
TM		 4527 task_setup_data.callback_data = data;
4528 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4529}
4530
faf5f49c
TM		 4531static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4532{
19e03c57 4533 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4534 struct nfs_seqid *seqid;
1da177e4 4535 struct nfs4_lock_state *lsp;
06f814a3
TM		 4536 struct rpc_task *task;
4537 int status = 0;
536ff0f8 4538 unsigned char fl_flags = request->fl_flags;
faf5f49c 4539
8d0a8a9d 4540 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4541 /* Unlock _before_ we do the RPC call */
4542 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4543 down_read(&nfsi->rwsem);
4544 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4545 up_read(&nfsi->rwsem);
9b073574 4546 goto out;
19e03c57
TM		 4547 }
4548 up_read(&nfsi->rwsem);
8d0a8a9d 4549 if (status != 0)
9b073574
TM		 4550 goto out;
4551 /* Is this a delegated lock? */
4552 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4553 goto out;
8d0a8a9d 4554 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4555 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4556 status = -ENOMEM;
911d1aaf 4557 if (seqid == NULL)
9b073574 4558 goto out;
cd3758e3 4559 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4560 status = PTR_ERR(task);
4561 if (IS_ERR(task))
9b073574 4562 goto out;
a5d16a4d 4563 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4564 rpc_put_task(task);
9b073574 4565out:
536ff0f8 4566 request->fl_flags = fl_flags;
1da177e4
LT		 4567 return status;
4568}
4569
a5d16a4d
TM		 4570struct nfs4_lockdata {
4571 struct nfs_lock_args arg;
4572 struct nfs_lock_res res;
4573 struct nfs4_lock_state *lsp;
4574 struct nfs_open_context *ctx;
4575 struct file_lock fl;
26e976a8 4576 unsigned long timestamp;
a5d16a4d
TM		 4577 int rpc_status;
4578 int cancelled;
66179efe 4579 struct nfs_server *server;
a5d16a4d
TM		 4580};
4581
4582static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4583 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4584 gfp_t gfp_mask)
1da177e4 4585{
a5d16a4d
TM		 4586 struct nfs4_lockdata *p;
4587 struct inode *inode = lsp->ls_state->inode;
1da177e4 4588 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4589
8535b2be 4590 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4591 if (p == NULL)
4592 return NULL;
4593
4594 p->arg.fh = NFS_FH(inode);
4595 p->arg.fl = &p->fl;
8535b2be 4596 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4597 if (p->arg.open_seqid == NULL)
4598 goto out_free;
8535b2be 4599 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4600 if (p->arg.lock_seqid == NULL)
2f74c0a0 4601 goto out_free_seqid;
a5d16a4d 4602 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4603 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4604 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4605 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4606 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4607 p->lsp = lsp;
66179efe 4608 p->server = server;
a5d16a4d
TM		 4609 atomic_inc(&lsp->ls_count);
4610 p->ctx = get_nfs_open_context(ctx);
4611 memcpy(&p->fl, fl, sizeof(p->fl));
4612 return p;
2f74c0a0
TM		 4613out_free_seqid:
4614 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4615out_free:
4616 kfree(p);
4617 return NULL;
4618}
4619
4620static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4621{
4622 struct nfs4_lockdata *data = calldata;
4623 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4624
3110ff80 4625 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4626 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4627 return;
a5d16a4d
TM		 4628 /* Do we need to do an open_to_lock_owner? */
4629 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4630 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4631 return;
a5d16a4d
TM		 4632 data->arg.open_stateid = &state->stateid;
4633 data->arg.new_lock_owner = 1;
c1d51931 4634 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4635 } else
4636 data->arg.new_lock_owner = 0;
26e976a8 4637 data->timestamp = jiffies;
035168ab
TM		 4638 if (nfs4_setup_sequence(data->server,
4639 &data->arg.seq_args,
9d12b216 4640 &data->res.seq_res, task))
66179efe 4641 return;
5138fde0 4642 rpc_call_start(task);
3110ff80 4643 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4644}
4645
b257957e
AB		 4646static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4647{
4648 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4649 nfs4_lock_prepare(task, calldata);
4650}
4651
a5d16a4d
TM		 4652static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4653{
4654 struct nfs4_lockdata *data = calldata;
4655
3110ff80 4656 dprintk("%s: begin!\n", __func__);
a5d16a4d 4657
14516c3a
TM		 4658 if (!nfs4_sequence_done(task, &data->res.seq_res))
4659 return;
66179efe 4660
a5d16a4d 4661 data->rpc_status = task->tk_status;
a5d16a4d 4662 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4663 if (data->rpc_status == 0)
4664 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4665 else
4666 goto out;
4667 }
4668 if (data->rpc_status == 0) {
f597c537 4669 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4670 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4671 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4672 }
a5d16a4d 4673out:
3110ff80 4674 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4675}
4676
4677static void nfs4_lock_release(void *calldata)
4678{
4679 struct nfs4_lockdata *data = calldata;
4680
3110ff80 4681 dprintk("%s: begin!\n", __func__);
2f74c0a0 4682 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4683 if (data->cancelled != 0) {
4684 struct rpc_task *task;
4685 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4686 data->arg.lock_seqid);
4687 if (!IS_ERR(task))
bf294b41 4688 rpc_put_task_async(task);
3110ff80 4689 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4690 } else
4691 nfs_free_seqid(data->arg.lock_seqid);
4692 nfs4_put_lock_state(data->lsp);
4693 put_nfs_open_context(data->ctx);
4694 kfree(data);
3110ff80 4695 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4696}
4697
4698static const struct rpc_call_ops nfs4_lock_ops = {
4699 .rpc_call_prepare = nfs4_lock_prepare,
4700 .rpc_call_done = nfs4_lock_done,
4701 .rpc_release = nfs4_lock_release,
4702};
4703
b257957e
AB		 4704static const struct rpc_call_ops nfs4_recover_lock_ops = {
4705 .rpc_call_prepare = nfs4_recover_lock_prepare,
4706 .rpc_call_done = nfs4_lock_done,
4707 .rpc_release = nfs4_lock_release,
4708};
4709
2bee72a6
TM		 4710static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4711{
2bee72a6
TM		 4712 switch (error) {
4713 case -NFS4ERR_ADMIN_REVOKED:
4714 case -NFS4ERR_BAD_STATEID:
ecac799a 4715 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4716 if (new_lock_owner != 0 ||
795a88c9 4717 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4718 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4719 break;
4720 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4721 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4722 case -NFS4ERR_EXPIRED:
4723 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4724 };
4725}
4726
afe6c27c 4727static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4728{
4729 struct nfs4_lockdata *data;
4730 struct rpc_task *task;
5138fde0
TM		 4731 struct rpc_message msg = {
4732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4733 .rpc_cred = state->owner->so_cred,
4734 };
c970aa85
TM		 4735 struct rpc_task_setup task_setup_data = {
4736 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4737 .rpc_message = &msg,
c970aa85 4738 .callback_ops = &nfs4_lock_ops,
101070ca 4739 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4740 .flags = RPC_TASK_ASYNC,
4741 };
a5d16a4d
TM		 4742 int ret;
4743
3110ff80 4744 dprintk("%s: begin!\n", __func__);
cd3758e3 4745 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4746 fl->fl_u.nfs4_fl.owner,
4747 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4748 if (data == NULL)
4749 return -ENOMEM;
4750 if (IS_SETLKW(cmd))
4751 data->arg.block = 1;
b257957e
AB		 4752 if (recovery_type > NFS_LOCK_NEW) {
4753 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4754 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4755 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4756 }
9d12b216 4757 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4758 msg.rpc_argp = &data->arg;
4759 msg.rpc_resp = &data->res;
c970aa85
TM		 4760 task_setup_data.callback_data = data;
4761 task = rpc_run_task(&task_setup_data);
7a1218a2 4762 if (IS_ERR(task))
a5d16a4d 4763 return PTR_ERR(task);
a5d16a4d
TM		 4764 ret = nfs4_wait_for_completion_rpc_task(task);
4765 if (ret == 0) {
4766 ret = data->rpc_status;
2bee72a6
TM		 4767 if (ret)
4768 nfs4_handle_setlk_error(data->server, data->lsp,
4769 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4770 } else
4771 data->cancelled = 1;
e6b3c4db 4772 rpc_put_task(task);
3110ff80 4773 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4774 return ret;
1da177e4
LT		 4775}
4776
4777static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4778{
202b50dc 4779 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4780 struct nfs4_exception exception = {
4781 .inode = state->inode,
4782 };
202b50dc
TM		 4783 int err;
4784
4785 do {
42a2d13e
TM		 4786 /* Cache the lock if possible... */
4787 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4788 return 0;
afe6c27c 4789 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4790 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4791 break;
4792 nfs4_handle_exception(server, err, &exception);
4793 } while (exception.retry);
4794 return err;
1da177e4
LT		 4795}
4796
4797static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4798{
202b50dc 4799 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4800 struct nfs4_exception exception = {
4801 .inode = state->inode,
4802 };
202b50dc
TM		 4803 int err;
4804
6bfc93ef
TM		 4805 err = nfs4_set_lock_state(state, request);
4806 if (err != 0)
4807 return err;
202b50dc 4808 do {
42a2d13e
TM		 4809 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4810 return 0;
afe6c27c 4811 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4812 switch (err) {
4813 default:
4814 goto out;
4815 case -NFS4ERR_GRACE:
4816 case -NFS4ERR_DELAY:
4817 nfs4_handle_exception(server, err, &exception);
4818 err = 0;
4819 }
202b50dc 4820 } while (exception.retry);
a9ed2e25 4821out:
202b50dc 4822 return err;
1da177e4
LT		 4823}
4824
f062eb6c 4825#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4826/**
4827 * nfs41_check_expired_locks - possibly free a lock stateid
4828 *
4829 * @state: NFSv4 state for an inode
4830 *
4831 * Returns NFS_OK if recovery for this stateid is now finished.
4832 * Otherwise a negative NFS4ERR value is returned.
4833 */
b01dd1d8 4834static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4835{
eb64cf96 4836 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4837 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4838 struct nfs_server *server = NFS_SERVER(state->inode);
4839
b01dd1d8 4840 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4841 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4842 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4843 if (status != NFS_OK) {
3e60ffdd
CL		 4844 /* Free the stateid unless the server
4845 * informs us the stateid is unrecognized. */
89af2739
CL		 4846 if (status != -NFS4ERR_BAD_STATEID)
4847 nfs41_free_stateid(server,
4848 &lsp->ls_stateid);
795a88c9 4849 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4850 ret = status;
4851 }
4852 }
4853 };
4854
4855 return ret;
4856}
4857
4858static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4859{
4860 int status = NFS_OK;
4861
4862 if (test_bit(LK_STATE_IN_USE, &state->flags))
4863 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4864 if (status != NFS_OK)
4865 status = nfs4_lock_expired(state, request);
4866 return status;
f062eb6c
BS		 4867}
4868#endif
4869
1da177e4
LT		 4870static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4871{
19e03c57 4872 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4873 unsigned char fl_flags = request->fl_flags;
8e469ebd 4874 int status = -ENOLCK;
1da177e4 4875
8e469ebd
TM		 4876 if ((fl_flags & FL_POSIX) &&
4877 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4878 goto out;
6bfc93ef 4879 /* Is this a delegated open? */
6bfc93ef
TM		 4880 status = nfs4_set_lock_state(state, request);
4881 if (status != 0)
4882 goto out;
01c3b861
TM		 4883 request->fl_flags |= FL_ACCESS;
4884 status = do_vfs_lock(request->fl_file, request);
4885 if (status < 0)
4886 goto out;
19e03c57 4887 down_read(&nfsi->rwsem);
01c3b861 4888 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4889 /* Yes: cache locks! */
01c3b861 4890 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4891 request->fl_flags = fl_flags & ~FL_SLEEP;
4892 status = do_vfs_lock(request->fl_file, request);
4893 goto out_unlock;
01c3b861 4894 }
afe6c27c 4895 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4896 if (status != 0)
01c3b861 4897 goto out_unlock;
6bfc93ef 4898 /* Note: we always want to sleep here! */
01c3b861 4899 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4900 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4901 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4902 "manager!\n", __func__);
01c3b861 4903out_unlock:
19e03c57 4904 up_read(&nfsi->rwsem);
01c3b861
TM		 4905out:
4906 request->fl_flags = fl_flags;
1da177e4
LT		 4907 return status;
4908}
4909
4910static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4911{
a1d0b5ee
TM		 4912 struct nfs4_exception exception = {
4913 .state = state,
05ffe24f 4914 .inode = state->inode,
a1d0b5ee 4915 };
1da177e4
LT		 4916 int err;
4917
4918 do {
965b5d67
TM		 4919 err = _nfs4_proc_setlk(state, cmd, request);
4920 if (err == -NFS4ERR_DENIED)
4921 err = -EAGAIN;
1da177e4 4922 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4923 err, &exception);
1da177e4
LT		 4924 } while (exception.retry);
4925 return err;
4926}
4927
4928static int
4929nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4930{
4931 struct nfs_open_context *ctx;
4932 struct nfs4_state *state;
4933 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4934 int status;
4935
4936 /* verify open state */
cd3758e3 4937 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4938 state = ctx->state;
4939
4940 if (request->fl_start < 0 || request->fl_end < 0)
4941 return -EINVAL;
4942
d953126a
TM		 4943 if (IS_GETLK(cmd)) {
4944 if (state != NULL)
4945 return nfs4_proc_getlk(state, F_GETLK, request);
4946 return 0;
4947 }
1da177e4
LT		 4948
4949 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4950 return -EINVAL;
4951
d953126a
TM		 4952 if (request->fl_type == F_UNLCK) {
4953 if (state != NULL)
4954 return nfs4_proc_unlck(state, cmd, request);
4955 return 0;
4956 }
1da177e4 4957
d953126a
TM		 4958 if (state == NULL)
4959 return -ENOLCK;
55725513
TM		 4960 /*
4961 * Don't rely on the VFS having checked the file open mode,
4962 * since it won't do this for flock() locks.
4963 */
f44106e2 4964 switch (request->fl_type) {
55725513
TM		 4965 case F_RDLCK:
4966 if (!(filp->f_mode & FMODE_READ))
4967 return -EBADF;
4968 break;
4969 case F_WRLCK:
4970 if (!(filp->f_mode & FMODE_WRITE))
4971 return -EBADF;
4972 }
4973
1da177e4
LT		 4974 do {
4975 status = nfs4_proc_setlk(state, cmd, request);
4976 if ((status != -EAGAIN) || IS_SETLK(cmd))
4977 break;
4978 timeout = nfs4_set_lock_task_retry(timeout);
4979 status = -ERESTARTSYS;
4980 if (signalled())
4981 break;
4982 } while(status < 0);
1da177e4
LT		 4983 return status;
4984}
4985
888e694c
TM		 4986int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4987{
4988 struct nfs_server *server = NFS_SERVER(state->inode);
4989 struct nfs4_exception exception = { };
4990 int err;
4991
4992 err = nfs4_set_lock_state(state, fl);
4993 if (err != 0)
4994 goto out;
4995 do {
afe6c27c 4996 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4997 switch (err) {
4998 default:
a030889a
WAA		 4999 printk(KERN_ERR "NFS: %s: unhandled error "
5000 "%d.\n", __func__, err);
d5122201 5001 case 0:
965b5d67 5002 case -ESTALE:
d5122201
TM		 5003 goto out;
5004 case -NFS4ERR_EXPIRED:
0ced63d1 5005 nfs4_schedule_stateid_recovery(server, state);
d5122201 5006 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5007 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 5008 nfs4_schedule_lease_recovery(server->nfs_client);
5009 goto out;
74e7bb73
RL		 5010 case -NFS4ERR_BADSESSION:
5011 case -NFS4ERR_BADSLOT:
5012 case -NFS4ERR_BAD_HIGH_SLOT:
5013 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5014 case -NFS4ERR_DEADSESSION:
9f594791 5015 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 5016 goto out;
965b5d67
TM		 5017 case -ERESTARTSYS:
5018 /*
5019 * The show must go on: exit, but mark the
5020 * stateid as needing recovery.
5021 */
a1d0b5ee 5022 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5023 case -NFS4ERR_ADMIN_REVOKED:
5024 case -NFS4ERR_BAD_STATEID:
5025 case -NFS4ERR_OPENMODE:
0400a6b0 5026 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5027 err = 0;
5028 goto out;
168667c4
TM		 5029 case -EKEYEXPIRED:
5030 /*
5031 * User RPCSEC_GSS context has expired.
5032 * We cannot recover this stateid now, so
5033 * skip it and allow recovery thread to
5034 * proceed.
5035 */
5036 err = 0;
5037 goto out;
965b5d67
TM		 5038 case -ENOMEM:
5039 case -NFS4ERR_DENIED:
5040 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5041 err = 0;
5042 goto out;
d5122201
TM		 5043 case -NFS4ERR_DELAY:
5044 break;
5045 }
888e694c
TM		 5046 err = nfs4_handle_exception(server, err, &exception);
5047 } while (exception.retry);
5048out:
5049 return err;
5050}
6b3b5496 5051
cf470c3e
TM		 5052struct nfs_release_lockowner_data {
5053 struct nfs4_lock_state *lsp;
5ae67c4f 5054 struct nfs_server *server;
cf470c3e
TM		 5055 struct nfs_release_lockowner_args args;
5056};
5057
d3c7b7cc
TM		 5058static void nfs4_release_lockowner_release(void *calldata)
5059{
cf470c3e 5060 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5061 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5062 kfree(calldata);
5063}
5064
17280175 5065static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5066 .rpc_release = nfs4_release_lockowner_release,
5067};
5068
cf470c3e 5069int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5070{
5071 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5072 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5073 struct rpc_message msg = {
5074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5075 };
5076
5077 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5078 return -EINVAL;
5079 data = kmalloc(sizeof(*data), GFP_NOFS);
5080 if (!data)
5081 return -ENOMEM;
5082 data->lsp = lsp;
5ae67c4f 5083 data->server = server;
cf470c3e
TM		 5084 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5085 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5086 data->args.lock_owner.s_dev = server->s_dev;
5087 msg.rpc_argp = &data->args;
5088 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5089 return 0;
d3c7b7cc
TM		 5090}
5091
aa1870af
BF		 5092#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5093
64c2ce8b
AK		 5094static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5095 const void *buf, size_t buflen,
5096 int flags, int type)
6b3b5496 5097{
64c2ce8b
AK		 5098 if (strcmp(key, "") != 0)
5099 return -EINVAL;
4b580ee3 5100
64c2ce8b 5101 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5102}
5103
64c2ce8b
AK		 5104static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5105 void *buf, size_t buflen, int type)
6b3b5496 5106{
64c2ce8b
AK		 5107 if (strcmp(key, "") != 0)
5108 return -EINVAL;
aa1870af 5109
64c2ce8b 5110 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5111}
5112
64c2ce8b
AK		 5113static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5114 size_t list_len, const char *name,
5115 size_t name_len, int type)
6b3b5496 5116{
64c2ce8b 5117 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5118
096455a2
BF		 5119 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5120 return 0;
64c2ce8b
AK		 5121
5122 if (list && len <= list_len)
5123 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5124 return len;
6b3b5496
BF		 5125}
5126
533eb461
AA		 5127/*
5128 * nfs_fhget will use either the mounted_on_fileid or the fileid
5129 */
69aaaae1
TM		 5130static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5131{
533eb461
AA		 5132 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5133 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5134 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5135 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5136 return;
5137
5138 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5139 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5140 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5141 fattr->nlink = 2;
5142}
5143
f05d147f
BS		 5144static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5145 const struct qstr *name,
5146 struct nfs4_fs_locations *fs_locations,
5147 struct page *page)
683b57b4
TM		 5148{
5149 struct nfs_server *server = NFS_SERVER(dir);
5150 u32 bitmask[2] = {
361e624f 5151 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5152 };
5153 struct nfs4_fs_locations_arg args = {
5154 .dir_fh = NFS_FH(dir),
c228fd3a 5155 .name = name,
683b57b4
TM		 5156 .page = page,
5157 .bitmask = bitmask,
5158 };
22958463
BH		 5159 struct nfs4_fs_locations_res res = {
5160 .fs_locations = fs_locations,
5161 };
683b57b4
TM		 5162 struct rpc_message msg = {
5163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5164 .rpc_argp = &args,
22958463 5165 .rpc_resp = &res,
683b57b4
TM		 5166 };
5167 int status;
5168
3110ff80 5169 dprintk("%s: start\n", __func__);
533eb461
AA		 5170
5171 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5172 * is not supported */
5173 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5174 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5175 else
5176 bitmask[0] |= FATTR4_WORD0_FILEID;
5177
c228fd3a 5178 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5179 fs_locations->server = server;
830b8e33 5180 fs_locations->nlocations = 0;
f05d147f 5181 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5182 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5183 return status;
5184}
5185
f05d147f
BS		 5186int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5187 const struct qstr *name,
5188 struct nfs4_fs_locations *fs_locations,
5189 struct page *page)
db0a9593
BS		 5190{
5191 struct nfs4_exception exception = { };
5192 int err;
5193 do {
5194 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5195 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5196 &exception);
5197 } while (exception.retry);
5198 return err;
5199}
5200
5a5ea0d4
BS		 5201static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5202{
5203 int status;
5204 struct nfs4_secinfo_arg args = {
5205 .dir_fh = NFS_FH(dir),
5206 .name = name,
5207 };
5208 struct nfs4_secinfo_res res = {
5209 .flavors = flavors,
5210 };
5211 struct rpc_message msg = {
5212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5213 .rpc_argp = &args,
5214 .rpc_resp = &res,
5215 };
5216
5217 dprintk("NFS call secinfo %s\n", name->name);
5218 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5219 dprintk("NFS reply secinfo: %d\n", status);
5220 return status;
5221}
5222
72de53ec
BS		 5223int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5224 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5225{
5226 struct nfs4_exception exception = { };
5227 int err;
5228 do {
5229 err = nfs4_handle_exception(NFS_SERVER(dir),
5230 _nfs4_proc_secinfo(dir, name, flavors),
5231 &exception);
5232 } while (exception.retry);
5233 return err;
5234}
5235
557134a3 5236#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5237/*
5238 * Check the exchange flags returned by the server for invalid flags, having
5239 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5240 * DS flags set.
5241 */
5242static int nfs4_check_cl_exchange_flags(u32 flags)
5243{
5244 if (flags & ~EXCHGID4_FLAG_MASK_R)
5245 goto out_inval;
5246 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5247 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5248 goto out_inval;
5249 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5250 goto out_inval;
5251 return NFS_OK;
5252out_inval:
5253 return -NFS4ERR_INVAL;
5254}
5255
78fe0f41 5256static bool
79d4e1f0
CL		 5257nfs41_same_server_scope(struct nfs41_server_scope *a,
5258 struct nfs41_server_scope *b)
78fe0f41
WAA		 5259{
5260 if (a->server_scope_sz == b->server_scope_sz &&
5261 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5262 return true;
5263
5264 return false;
5265}
5266
7c44f1ae
WAA		 5267/*
5268 * nfs4_proc_bind_conn_to_session()
5269 *
5270 * The 4.1 client currently uses the same TCP connection for the
5271 * fore and backchannel.
5272 */
2cf047c9 5273int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5274{
5275 int status;
5276 struct nfs41_bind_conn_to_session_res res;
5277 struct rpc_message msg = {
5278 .rpc_proc =
5279 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5280 .rpc_argp = clp,
5281 .rpc_resp = &res,
2cf047c9 5282 .rpc_cred = cred,
7c44f1ae
WAA		 5283 };
5284
5285 dprintk("--> %s\n", __func__);
5286 BUG_ON(clp == NULL);
5287
5288 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5289 if (unlikely(res.session == NULL)) {
5290 status = -ENOMEM;
5291 goto out;
5292 }
5293
5294 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5295 if (status == 0) {
5296 if (memcmp(res.session->sess_id.data,
5297 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5298 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5299 status = -EIO;
5300 goto out_session;
5301 }
5302 if (res.dir != NFS4_CDFS4_BOTH) {
5303 dprintk("NFS: %s: Unexpected direction from server\n",
5304 __func__);
5305 status = -EIO;
5306 goto out_session;
5307 }
5308 if (res.use_conn_in_rdma_mode) {
5309 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5310 __func__);
5311 status = -EIO;
5312 goto out_session;
5313 }
5314 }
5315out_session:
5316 kfree(res.session);
5317out:
5318 dprintk("<-- %s status= %d\n", __func__, status);
5319 return status;
5320}
5321
99fe60d0
BH		 5322/*
5323 * nfs4_proc_exchange_id()
5324 *
6bbb4ae8
CL		 5325 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5326 *
99fe60d0
BH		 5327 * Since the clientid has expired, all compounds using sessions
5328 * associated with the stale clientid will be returning
5329 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5330 * be in some phase of session reset.
5331 */
4d643d1d 5332int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5333{
5334 nfs4_verifier verifier;
5335 struct nfs41_exchange_id_args args = {
cd93710e 5336 .verifier = &verifier,
99fe60d0 5337 .client = clp,
357f54d6 5338 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5339 };
5340 struct nfs41_exchange_id_res res = {
32b01310 5341 0
99fe60d0
BH		 5342 };
5343 int status;
5344 struct rpc_message msg = {
5345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5346 .rpc_argp = &args,
5347 .rpc_resp = &res,
5348 .rpc_cred = cred,
5349 };
99fe60d0 5350
f092075d 5351 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5352 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5353 sizeof(args.id));
6bbb4ae8
CL		 5354 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5355 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5356 args.id_len, args.id);
99fe60d0 5357
acdeb69d 5358 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5359 GFP_NOFS);
acdeb69d 5360 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5361 status = -ENOMEM;
5362 goto out;
5363 }
78fe0f41 5364
79d4e1f0 5365 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5366 GFP_NOFS);
177313f1 5367 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5368 status = -ENOMEM;
acdeb69d 5369 goto out_server_owner;
abe9a6d5 5370 }
78fe0f41 5371
bbafffd2 5372 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5373 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5374 status = -ENOMEM;
5375 goto out_server_scope;
5376 }
5377
1bd714f2 5378 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5379 if (status == 0)
32b01310 5380 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5381
acdeb69d 5382 if (status == 0) {
32b01310
TM		 5383 clp->cl_clientid = res.clientid;
5384 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5385 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5386 clp->cl_seqid = res.seqid;
5387
acdeb69d
CL		 5388 kfree(clp->cl_serverowner);
5389 clp->cl_serverowner = res.server_owner;
5390 res.server_owner = NULL;
78fe0f41 5391
7d2ed9ac 5392 /* use the most recent implementation id */
59155546
CL		 5393 kfree(clp->cl_implid);
5394 clp->cl_implid = res.impl_id;
7d2ed9ac 5395
177313f1 5396 if (clp->cl_serverscope != NULL &&
79d4e1f0 5397 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5398 res.server_scope)) {
5399 dprintk("%s: server_scope mismatch detected\n",
5400 __func__);
5401 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5402 kfree(clp->cl_serverscope);
5403 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5404 }
5405
177313f1 5406 if (clp->cl_serverscope == NULL) {
79d4e1f0 5407 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5408 goto out;
5409 }
32b01310
TM		 5410 } else
5411 kfree(res.impl_id);
7d2ed9ac 5412
acdeb69d
CL		 5413out_server_owner:
5414 kfree(res.server_owner);
7d2ed9ac 5415out_server_scope:
abe9a6d5
WAA		 5416 kfree(res.server_scope);
5417out:
177313f1 5418 if (clp->cl_implid != NULL)
6bbb4ae8 5419 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5420 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5421 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5422 clp->cl_implid->date.seconds,
5423 clp->cl_implid->date.nseconds);
6bbb4ae8 5424 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5425 return status;
5426}
5427
66245539
TM		 5428static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5429 struct rpc_cred *cred)
5430{
5431 struct rpc_message msg = {
5432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5433 .rpc_argp = clp,
5434 .rpc_cred = cred,
5435 };
5436 int status;
5437
5438 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5439 if (status)
02c67525 5440 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5441 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5442 return status;
5443}
5444
5445static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5446 struct rpc_cred *cred)
5447{
5448 unsigned int loop;
5449 int ret;
5450
5451 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5452 ret = _nfs4_proc_destroy_clientid(clp, cred);
5453 switch (ret) {
5454 case -NFS4ERR_DELAY:
5455 case -NFS4ERR_CLIENTID_BUSY:
5456 ssleep(1);
5457 break;
5458 default:
5459 return ret;
5460 }
5461 }
5462 return 0;
5463}
5464
5465int nfs4_destroy_clientid(struct nfs_client *clp)
5466{
5467 struct rpc_cred *cred;
5468 int ret = 0;
5469
5470 if (clp->cl_mvops->minor_version < 1)
5471 goto out;
5472 if (clp->cl_exchange_flags == 0)
5473 goto out;
05f4c350
CL		 5474 if (clp->cl_preserve_clid)
5475 goto out;
66245539
TM		 5476 cred = nfs4_get_exchange_id_cred(clp);
5477 ret = nfs4_proc_destroy_clientid(clp, cred);
5478 if (cred)
5479 put_rpccred(cred);
5480 switch (ret) {
5481 case 0:
5482 case -NFS4ERR_STALE_CLIENTID:
5483 clp->cl_exchange_flags = 0;
5484 }
5485out:
5486 return ret;
5487}
5488
2050f0cc
AA		 5489struct nfs4_get_lease_time_data {
5490 struct nfs4_get_lease_time_args *args;
5491 struct nfs4_get_lease_time_res *res;
5492 struct nfs_client *clp;
5493};
5494
5495static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5496 void *calldata)
5497{
5498 int ret;
5499 struct nfs4_get_lease_time_data *data =
5500 (struct nfs4_get_lease_time_data *)calldata;
5501
5502 dprintk("--> %s\n", __func__);
689cf5c1 5503 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5504 /* just setup sequence, do not trigger session recovery
5505 since we're invoked within one */
5506 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5507 &data->args->la_seq_args,
9d12b216 5508 &data->res->lr_seq_res, task);
2050f0cc
AA		 5509
5510 BUG_ON(ret == -EAGAIN);
5511 rpc_call_start(task);
5512 dprintk("<-- %s\n", __func__);
5513}
5514
5515/*
5516 * Called from nfs4_state_manager thread for session setup, so don't recover
5517 * from sequence operation or clientid errors.
5518 */
5519static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5520{
5521 struct nfs4_get_lease_time_data *data =
5522 (struct nfs4_get_lease_time_data *)calldata;
5523
5524 dprintk("--> %s\n", __func__);
14516c3a
TM		 5525 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5526 return;
2050f0cc
AA		 5527 switch (task->tk_status) {
5528 case -NFS4ERR_DELAY:
5529 case -NFS4ERR_GRACE:
5530 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5531 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5532 task->tk_status = 0;
a8a4ae3a
AA		 5533 /* fall through */
5534 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5535 rpc_restart_call_prepare(task);
2050f0cc
AA		 5536 return;
5537 }
2050f0cc
AA		 5538 dprintk("<-- %s\n", __func__);
5539}
5540
17280175 5541static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5542 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5543 .rpc_call_done = nfs4_get_lease_time_done,
5544};
5545
5546int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5547{
5548 struct rpc_task *task;
5549 struct nfs4_get_lease_time_args args;
5550 struct nfs4_get_lease_time_res res = {
5551 .lr_fsinfo = fsinfo,
5552 };
5553 struct nfs4_get_lease_time_data data = {
5554 .args = &args,
5555 .res = &res,
5556 .clp = clp,
5557 };
5558 struct rpc_message msg = {
5559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5560 .rpc_argp = &args,
5561 .rpc_resp = &res,
5562 };
5563 struct rpc_task_setup task_setup = {
5564 .rpc_client = clp->cl_rpcclient,
5565 .rpc_message = &msg,
5566 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5567 .callback_data = &data,
5568 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5569 };
5570 int status;
5571
9d12b216 5572 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5573 dprintk("--> %s\n", __func__);
5574 task = rpc_run_task(&task_setup);
5575
5576 if (IS_ERR(task))
5577 status = PTR_ERR(task);
5578 else {
5579 status = task->tk_status;
5580 rpc_put_task(task);
5581 }
5582 dprintk("<-- %s return %d\n", __func__, status);
5583
5584 return status;
5585}
5586
f86f36a6
TM		 5587static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5588{
5589 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5590}
5591
5592static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5593 struct nfs4_slot *new,
5594 u32 max_slots,
5595 u32 ivalue)
5596{
5597 struct nfs4_slot *old = NULL;
5598 u32 i;
5599
5600 spin_lock(&tbl->slot_tbl_lock);
5601 if (new) {
5602 old = tbl->slots;
5603 tbl->slots = new;
5604 tbl->max_slots = max_slots;
5605 }
5606 tbl->highest_used_slotid = -1; /* no slot is currently used */
5607 for (i = 0; i < tbl->max_slots; i++)
5608 tbl->slots[i].seq_nr = ivalue;
5609 spin_unlock(&tbl->slot_tbl_lock);
5610 kfree(old);
5611}
5612
b73dafa7 5613/*
f86f36a6 5614 * (re)Initialise a slot table
b73dafa7 5615 */
f86f36a6
TM		 5616static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5617 u32 ivalue)
ac72b7b3 5618{
104aeba4 5619 struct nfs4_slot *new = NULL;
f86f36a6 5620 int ret = -ENOMEM;
ac72b7b3 5621
104aeba4
AA		 5622 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5623 max_reqs, tbl->max_slots);
ac72b7b3 5624
104aeba4
AA		 5625 /* Does the newly negotiated max_reqs match the existing slot table? */
5626 if (max_reqs != tbl->max_slots) {
f86f36a6 5627 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5628 if (!new)
5629 goto out;
104aeba4 5630 }
f86f36a6
TM		 5631 ret = 0;
5632
5633 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5634 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5635 tbl, tbl->slots, tbl->max_slots);
5636out:
5637 dprintk("<-- %s: return %d\n", __func__, ret);
5638 return ret;
5639}
5640
f8625a6a
RL		 5641/* Destroy the slot table */
5642static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5643{
5644 if (session->fc_slot_table.slots != NULL) {
5645 kfree(session->fc_slot_table.slots);
5646 session->fc_slot_table.slots = NULL;
5647 }
5648 if (session->bc_slot_table.slots != NULL) {
5649 kfree(session->bc_slot_table.slots);
5650 session->bc_slot_table.slots = NULL;
5651 }
5652 return;
5653}
5654
050047ce 5655/*
aacd5537 5656 * Initialize or reset the forechannel and backchannel tables
050047ce 5657 */
aacd5537 5658static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5659{
f26468fb 5660 struct nfs4_slot_table *tbl;
aacd5537 5661 int status;
050047ce 5662
aacd5537
AA		 5663 dprintk("--> %s\n", __func__);
5664 /* Fore channel */
5665 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5666 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5667 if (status) /* -ENOMEM */
5668 return status;
aacd5537
AA		 5669 /* Back channel */
5670 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5671 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5672 if (status && tbl->slots == NULL)
5673 /* Fore and back channel share a connection so get
5674 * both slot tables or neither */
5675 nfs4_destroy_slot_tables(ses);
f8625a6a 5676 return status;
557134a3
AA		 5677}
5678
5679struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5680{
5681 struct nfs4_session *session;
5682 struct nfs4_slot_table *tbl;
5683
8535b2be 5684 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5685 if (!session)
5686 return NULL;
76db6d95 5687
557134a3 5688 tbl = &session->fc_slot_table;
45d43c29 5689 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5690 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5691 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5692 init_completion(&tbl->complete);
f8625a6a
RL		 5693
5694 tbl = &session->bc_slot_table;
45d43c29 5695 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5696 spin_lock_init(&tbl->slot_tbl_lock);
5697 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5698 init_completion(&tbl->complete);
f8625a6a 5699
1055d76d
TM		 5700 session->session_state = 1<<NFS4_SESSION_INITING;
5701
557134a3
AA		 5702 session->clp = clp;
5703 return session;
5704}
5705
5706void nfs4_destroy_session(struct nfs4_session *session)
5707{
2446ab60 5708 struct rpc_xprt *xprt;
848f5bda 5709 struct rpc_cred *cred;
2446ab60 5710
848f5bda
TM		 5711 cred = nfs4_get_exchange_id_cred(session->clp);
5712 nfs4_proc_destroy_session(session, cred);
5713 if (cred)
5714 put_rpccred(cred);
2446ab60
TM		 5715
5716 rcu_read_lock();
5717 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5718 rcu_read_unlock();
5a0ffe54 5719 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5720 __func__, xprt);
5721 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5722 nfs4_destroy_slot_tables(session);
557134a3
AA		 5723 kfree(session);
5724}
5725
fc931582
AA		 5726/*
5727 * Initialize the values to be used by the client in CREATE_SESSION
5728 * If nfs4_init_session set the fore channel request and response sizes,
5729 * use them.
5730 *
5731 * Set the back channel max_resp_sz_cached to zero to force the client to
5732 * always set csa_cachethis to FALSE because the current implementation
5733 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5734 */
5735static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5736{
5737 struct nfs4_session *session = args->client->cl_session;
5738 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5739 mxresp_sz = session->fc_attrs.max_resp_sz;
5740
5741 if (mxrqst_sz == 0)
5742 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5743 if (mxresp_sz == 0)
5744 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5745 /* Fore channel attributes */
fc931582
AA		 5746 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5747 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5748 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5749 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5750
5751 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5752 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5753 __func__,
5754 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5755 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5756
5757 /* Back channel attributes */
fc931582
AA		 5758 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5759 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5760 args->bc_attrs.max_resp_sz_cached = 0;
5761 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5762 args->bc_attrs.max_reqs = 1;
5763
5764 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5765 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5766 __func__,
5767 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5768 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5769 args->bc_attrs.max_reqs);
5770}
5771
43c2e885 5772static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5773{
43c2e885
BF		 5774 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5775 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5776
43c2e885
BF		 5777 if (rcvd->max_resp_sz > sent->max_resp_sz)
5778 return -EINVAL;
5779 /*
5780 * Our requested max_ops is the minimum we need; we're not
5781 * prepared to break up compounds into smaller pieces than that.
5782 * So, no point even trying to continue if the server won't
5783 * cooperate:
5784 */
5785 if (rcvd->max_ops < sent->max_ops)
5786 return -EINVAL;
5787 if (rcvd->max_reqs == 0)
5788 return -EINVAL;
b4b9a0c1
VG		 5789 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5790 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5791 return 0;
8d35301d
AA		 5792}
5793
43c2e885
BF		 5794static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5795{
5796 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5797 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5798
43c2e885
BF		 5799 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5800 return -EINVAL;
5801 if (rcvd->max_resp_sz < sent->max_resp_sz)
5802 return -EINVAL;
5803 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5804 return -EINVAL;
5805 /* These would render the backchannel useless: */
b4b9a0c1 5806 if (rcvd->max_ops != sent->max_ops)
43c2e885 5807 return -EINVAL;
b4b9a0c1 5808 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5809 return -EINVAL;
5810 return 0;
5811}
8d35301d 5812
8d35301d
AA		 5813static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5814 struct nfs4_session *session)
5815{
43c2e885 5816 int ret;
8d35301d 5817
43c2e885
BF		 5818 ret = nfs4_verify_fore_channel_attrs(args, session);
5819 if (ret)
5820 return ret;
5821 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5822}
5823
848f5bda
TM		 5824static int _nfs4_proc_create_session(struct nfs_client *clp,
5825 struct rpc_cred *cred)
fc931582
AA		 5826{
5827 struct nfs4_session *session = clp->cl_session;
5828 struct nfs41_create_session_args args = {
5829 .client = clp,
5830 .cb_program = NFS4_CALLBACK,
5831 };
5832 struct nfs41_create_session_res res = {
5833 .client = clp,
5834 };
5835 struct rpc_message msg = {
5836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5837 .rpc_argp = &args,
5838 .rpc_resp = &res,
848f5bda 5839 .rpc_cred = cred,
fc931582
AA		 5840 };
5841 int status;
5842
5843 nfs4_init_channel_attrs(&args);
0f91421e 5844 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5845
1bd714f2 5846 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5847
8d35301d
AA		 5848 if (!status)
5849 /* Verify the session's negotiated channel_attrs values */
5850 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5851 if (!status) {
5852 /* Increment the clientid slot sequence id */
5853 clp->cl_seqid++;
5854 }
5855
5856 return status;
5857}
5858
5859/*
5860 * Issues a CREATE_SESSION operation to the server.
5861 * It is the responsibility of the caller to verify the session is
5862 * expired before calling this routine.
5863 */
848f5bda 5864int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5865{
5866 int status;
5867 unsigned *ptr;
fc931582
AA		 5868 struct nfs4_session *session = clp->cl_session;
5869
5870 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5871
848f5bda 5872 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5873 if (status)
5874 goto out;
5875
aacd5537
AA		 5876 /* Init or reset the session slot tables */
5877 status = nfs4_setup_session_slot_tables(session);
5878 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5879 if (status)
5880 goto out;
5881
5882 ptr = (unsigned *)&session->sess_id.data[0];
5883 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5884 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5885out:
5886 dprintk("<-- %s\n", __func__);
5887 return status;
5888}
5889
0f3e66c6
AA		 5890/*
5891 * Issue the over-the-wire RPC DESTROY_SESSION.
5892 * The caller must serialize access to this routine.
5893 */
848f5bda
TM		 5894int nfs4_proc_destroy_session(struct nfs4_session *session,
5895 struct rpc_cred *cred)
0f3e66c6 5896{
848f5bda
TM		 5897 struct rpc_message msg = {
5898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5899 .rpc_argp = session,
5900 .rpc_cred = cred,
5901 };
0f3e66c6 5902 int status = 0;
0f3e66c6
AA		 5903
5904 dprintk("--> nfs4_proc_destroy_session\n");
5905
5906 /* session is still being setup */
5907 if (session->clp->cl_cons_state != NFS_CS_READY)
5908 return status;
5909
1bd714f2 5910 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5911
5912 if (status)
08106ac7 5913 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5914 "Session has been destroyed regardless...\n", status);
5915
5916 dprintk("<-- nfs4_proc_destroy_session\n");
5917 return status;
5918}
5919
7b38c368
TM		 5920/*
5921 * With sessions, the client is not marked ready until after a
5922 * successful EXCHANGE_ID and CREATE_SESSION.
5923 *
5924 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5925 * other versions of NFS can be tried.
5926 */
5927static int nfs41_check_session_ready(struct nfs_client *clp)
5928{
5929 int ret;
5930
5931 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5932 ret = nfs4_client_recover_expired_lease(clp);
5933 if (ret)
5934 return ret;
5935 }
5936 if (clp->cl_cons_state < NFS_CS_READY)
5937 return -EPROTONOSUPPORT;
54ac471c 5938 smp_rmb();
7b38c368
TM		 5939 return 0;
5940}
5941
fccba804
TM		 5942int nfs4_init_session(struct nfs_server *server)
5943{
5944 struct nfs_client *clp = server->nfs_client;
2449ea2e 5945 struct nfs4_session *session;
68bf05ef 5946 unsigned int rsize, wsize;
fccba804
TM		 5947
5948 if (!nfs4_has_session(clp))
5949 return 0;
5950
1055d76d 5951 session = clp->cl_session;
7b38c368
TM		 5952 spin_lock(&clp->cl_lock);
5953 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5954
7b38c368
TM		 5955 rsize = server->rsize;
5956 if (rsize == 0)
5957 rsize = NFS_MAX_FILE_IO_SIZE;
5958 wsize = server->wsize;
5959 if (wsize == 0)
5960 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5961
7b38c368
TM		 5962 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5963 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5964 }
5965 spin_unlock(&clp->cl_lock);
2449ea2e 5966
7b38c368 5967 return nfs41_check_session_ready(clp);
fccba804
TM		 5968}
5969
7b38c368 5970int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5971{
5972 struct nfs4_session *session = clp->cl_session;
5973 int ret;
5974
7b38c368
TM		 5975 spin_lock(&clp->cl_lock);
5976 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5977 /*
5978 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5979 * DS lease to be equal to the MDS lease.
5980 */
5981 clp->cl_lease_time = lease_time;
5982 clp->cl_last_renewal = jiffies;
5983 }
5984 spin_unlock(&clp->cl_lock);
d83217c1 5985
7b38c368
TM		 5986 ret = nfs41_check_session_ready(clp);
5987 if (ret)
5988 return ret;
5989 /* Test for the DS role */
5990 if (!is_ds_client(clp))
5991 return -ENODEV;
5992 return 0;
d83217c1
AA		 5993}
5994EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5995
5996
fc01cea9
AA		 5997/*
5998 * Renew the cl_session lease.
5999 */
d5f8d3fe
TM		 6000struct nfs4_sequence_data {
6001 struct nfs_client *clp;
6002 struct nfs4_sequence_args args;
6003 struct nfs4_sequence_res res;
6004};
6005
dc96aef9
AB		 6006static void nfs41_sequence_release(void *data)
6007{
d5f8d3fe
TM		 6008 struct nfs4_sequence_data *calldata = data;
6009 struct nfs_client *clp = calldata->clp;
dc96aef9 6010
7135840f
AB		 6011 if (atomic_read(&clp->cl_count) > 1)
6012 nfs4_schedule_state_renewal(clp);
6013 nfs_put_client(clp);
d5f8d3fe 6014 kfree(calldata);
dc96aef9
AB		 6015}
6016
aa5190d0
TM		 6017static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6018{
6019 switch(task->tk_status) {
6020 case -NFS4ERR_DELAY:
aa5190d0
TM		 6021 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6022 return -EAGAIN;
6023 default:
0400a6b0 6024 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6025 }
6026 return 0;
6027}
6028
dc96aef9 6029static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6030{
d5f8d3fe
TM		 6031 struct nfs4_sequence_data *calldata = data;
6032 struct nfs_client *clp = calldata->clp;
fc01cea9 6033
14516c3a
TM		 6034 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6035 return;
fc01cea9
AA		 6036
6037 if (task->tk_status < 0) {
6038 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6039 if (atomic_read(&clp->cl_count) == 1)
6040 goto out;
fc01cea9 6041
aa5190d0
TM		 6042 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6043 rpc_restart_call_prepare(task);
fc01cea9
AA		 6044 return;
6045 }
6046 }
fc01cea9 6047 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6048out:
fc01cea9
AA		 6049 dprintk("<-- %s\n", __func__);
6050}
6051
6052static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6053{
d5f8d3fe
TM		 6054 struct nfs4_sequence_data *calldata = data;
6055 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6056 struct nfs4_sequence_args *args;
6057 struct nfs4_sequence_res *res;
6058
fc01cea9
AA		 6059 args = task->tk_msg.rpc_argp;
6060 res = task->tk_msg.rpc_resp;
6061
9d12b216 6062 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6063 return;
6064 rpc_call_start(task);
6065}
6066
6067static const struct rpc_call_ops nfs41_sequence_ops = {
6068 .rpc_call_done = nfs41_sequence_call_done,
6069 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6070 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6071};
6072
71ac6da9 6073static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 6074{
d5f8d3fe 6075 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6076 struct rpc_message msg = {
6077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6078 .rpc_cred = cred,
6079 };
71ac6da9
TM		 6080 struct rpc_task_setup task_setup_data = {
6081 .rpc_client = clp->cl_rpcclient,
6082 .rpc_message = &msg,
6083 .callback_ops = &nfs41_sequence_ops,
6084 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6085 };
fc01cea9 6086
7135840f 6087 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6088 return ERR_PTR(-EIO);
dfb4f309 6089 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6090 if (calldata == NULL) {
7135840f 6091 nfs_put_client(clp);
71ac6da9 6092 return ERR_PTR(-ENOMEM);
fc01cea9 6093 }
9d12b216 6094 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6095 msg.rpc_argp = &calldata->args;
6096 msg.rpc_resp = &calldata->res;
6097 calldata->clp = clp;
71ac6da9 6098 task_setup_data.callback_data = calldata;
fc01cea9 6099
71ac6da9
TM		 6100 return rpc_run_task(&task_setup_data);
6101}
6102
2f60ea6b 6103static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6104{
6105 struct rpc_task *task;
6106 int ret = 0;
6107
2f60ea6b
TM		 6108 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6109 return 0;
71ac6da9
TM		 6110 task = _nfs41_proc_sequence(clp, cred);
6111 if (IS_ERR(task))
6112 ret = PTR_ERR(task);
6113 else
bf294b41 6114 rpc_put_task_async(task);
71ac6da9
TM		 6115 dprintk("<-- %s status=%d\n", __func__, ret);
6116 return ret;
6117}
6118
6119static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6120{
6121 struct rpc_task *task;
6122 int ret;
6123
6124 task = _nfs41_proc_sequence(clp, cred);
6125 if (IS_ERR(task)) {
6126 ret = PTR_ERR(task);
6127 goto out;
6128 }
6129 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6130 if (!ret) {
6131 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6132
6133 if (task->tk_status == 0)
6134 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6135 ret = task->tk_status;
b4410c2f 6136 }
71ac6da9
TM		 6137 rpc_put_task(task);
6138out:
6139 dprintk("<-- %s status=%d\n", __func__, ret);
6140 return ret;
fc01cea9
AA		 6141}
6142
fce5c838
RL		 6143struct nfs4_reclaim_complete_data {
6144 struct nfs_client *clp;
6145 struct nfs41_reclaim_complete_args arg;
6146 struct nfs41_reclaim_complete_res res;
6147};
6148
6149static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6150{
6151 struct nfs4_reclaim_complete_data *calldata = data;
6152
b257957e 6153 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6154 if (nfs41_setup_sequence(calldata->clp->cl_session,
6155 &calldata->arg.seq_args,
9d12b216 6156 &calldata->res.seq_res, task))
fce5c838
RL		 6157 return;
6158
6159 rpc_call_start(task);
6160}
6161
aa5190d0
TM		 6162static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6163{
6164 switch(task->tk_status) {
6165 case 0:
6166 case -NFS4ERR_COMPLETE_ALREADY:
6167 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6168 break;
6169 case -NFS4ERR_DELAY:
aa5190d0 6170 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6171 /* fall through */
6172 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6173 return -EAGAIN;
6174 default:
0400a6b0 6175 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6176 }
6177 return 0;
6178}
6179
fce5c838
RL		 6180static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6181{
6182 struct nfs4_reclaim_complete_data *calldata = data;
6183 struct nfs_client *clp = calldata->clp;
6184 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6185
6186 dprintk("--> %s\n", __func__);
14516c3a
TM		 6187 if (!nfs41_sequence_done(task, res))
6188 return;
fce5c838 6189
aa5190d0
TM		 6190 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6191 rpc_restart_call_prepare(task);
6192 return;
6193 }
fce5c838
RL		 6194 dprintk("<-- %s\n", __func__);
6195}
6196
6197static void nfs4_free_reclaim_complete_data(void *data)
6198{
6199 struct nfs4_reclaim_complete_data *calldata = data;
6200
6201 kfree(calldata);
6202}
6203
6204static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6205 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6206 .rpc_call_done = nfs4_reclaim_complete_done,
6207 .rpc_release = nfs4_free_reclaim_complete_data,
6208};
6209
6210/*
6211 * Issue a global reclaim complete.
6212 */
6213static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6214{
6215 struct nfs4_reclaim_complete_data *calldata;
6216 struct rpc_task *task;
6217 struct rpc_message msg = {
6218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6219 };
6220 struct rpc_task_setup task_setup_data = {
6221 .rpc_client = clp->cl_rpcclient,
6222 .rpc_message = &msg,
6223 .callback_ops = &nfs4_reclaim_complete_call_ops,
6224 .flags = RPC_TASK_ASYNC,
6225 };
6226 int status = -ENOMEM;
6227
6228 dprintk("--> %s\n", __func__);
8535b2be 6229 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6230 if (calldata == NULL)
6231 goto out;
6232 calldata->clp = clp;
6233 calldata->arg.one_fs = 0;
fce5c838 6234
9d12b216 6235 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6236 msg.rpc_argp = &calldata->arg;
6237 msg.rpc_resp = &calldata->res;
6238 task_setup_data.callback_data = calldata;
6239 task = rpc_run_task(&task_setup_data);
acf82b85 6240 if (IS_ERR(task)) {
fce5c838 6241 status = PTR_ERR(task);
acf82b85
DC		 6242 goto out;
6243 }
c34c32ea
AA		 6244 status = nfs4_wait_for_completion_rpc_task(task);
6245 if (status == 0)
6246 status = task->tk_status;
fce5c838 6247 rpc_put_task(task);
acf82b85 6248 return 0;
fce5c838
RL		 6249out:
6250 dprintk("<-- %s status=%d\n", __func__, status);
6251 return status;
6252}
b1f69b75
AA		 6253
6254static void
6255nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6256{
6257 struct nfs4_layoutget *lgp = calldata;
c31663d4 6258 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6259
6260 dprintk("--> %s\n", __func__);
c31663d4
FI		 6261 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6262 * right now covering the LAYOUTGET we are about to send.
6263 * However, that is not so catastrophic, and there seems
6264 * to be no way to prevent it completely.
6265 */
b1f69b75 6266 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6267 &lgp->res.seq_res, task))
b1f69b75 6268 return;
cf7d63f1
FI		 6269 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6270 NFS_I(lgp->args.inode)->layout,
6271 lgp->args.ctx->state)) {
6272 rpc_exit(task, NFS4_OK);
6273 return;
6274 }
b1f69b75
AA		 6275 rpc_call_start(task);
6276}
6277
6278static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6279{
6280 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6281 struct inode *inode = lgp->args.inode;
6282 struct nfs_server *server = NFS_SERVER(inode);
6283 struct pnfs_layout_hdr *lo;
6284 struct nfs4_state *state = NULL;
b1f69b75
AA		 6285
6286 dprintk("--> %s\n", __func__);
6287
6288 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6289 goto out;
b1f69b75
AA		 6290
6291 switch (task->tk_status) {
6292 case 0:
ee314c2a 6293 goto out;
b1f69b75
AA		 6294 case -NFS4ERR_LAYOUTTRYLATER:
6295 case -NFS4ERR_RECALLCONFLICT:
6296 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6297 break;
6298 case -NFS4ERR_EXPIRED:
6299 case -NFS4ERR_BAD_STATEID:
6300 spin_lock(&inode->i_lock);
6301 lo = NFS_I(inode)->layout;
6302 if (!lo || list_empty(&lo->plh_segs)) {
6303 spin_unlock(&inode->i_lock);
6304 /* If the open stateid was bad, then recover it. */
6305 state = lgp->args.ctx->state;
6306 } else {
6307 LIST_HEAD(head);
6308
6309 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6310 spin_unlock(&inode->i_lock);
6311 /* Mark the bad layout state as invalid, then
6312 * retry using the open stateid. */
6313 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6314 }
6315 }
ee314c2a
TM		 6316 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6317 rpc_restart_call_prepare(task);
6318out:
b1f69b75
AA		 6319 dprintk("<-- %s\n", __func__);
6320}
6321
8554116e
IK		 6322static size_t max_response_pages(struct nfs_server *server)
6323{
6324 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6325 return nfs_page_array_len(0, max_resp_sz);
6326}
6327
6328static void nfs4_free_pages(struct page **pages, size_t size)
6329{
6330 int i;
6331
6332 if (!pages)
6333 return;
6334
6335 for (i = 0; i < size; i++) {
6336 if (!pages[i])
6337 break;
6338 __free_page(pages[i]);
6339 }
6340 kfree(pages);
6341}
6342
6343static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6344{
6345 struct page **pages;
6346 int i;
6347
6348 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6349 if (!pages) {
6350 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6351 return NULL;
6352 }
6353
6354 for (i = 0; i < size; i++) {
6355 pages[i] = alloc_page(gfp_flags);
6356 if (!pages[i]) {
6357 dprintk("%s: failed to allocate page\n", __func__);
6358 nfs4_free_pages(pages, size);
6359 return NULL;
6360 }
6361 }
6362
6363 return pages;
6364}
6365
b1f69b75
AA		 6366static void nfs4_layoutget_release(void *calldata)
6367{
6368 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6369 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6370 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6371
6372 dprintk("--> %s\n", __func__);
8554116e 6373 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6374 put_nfs_open_context(lgp->args.ctx);
6375 kfree(calldata);
6376 dprintk("<-- %s\n", __func__);
6377}
6378
6379static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6380 .rpc_call_prepare = nfs4_layoutget_prepare,
6381 .rpc_call_done = nfs4_layoutget_done,
6382 .rpc_release = nfs4_layoutget_release,
6383};
6384
a0b0a6e3
TM		 6385struct pnfs_layout_segment *
6386nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6387{
6388 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6389 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6390 struct rpc_task *task;
6391 struct rpc_message msg = {
6392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6393 .rpc_argp = &lgp->args,
6394 .rpc_resp = &lgp->res,
6395 };
6396 struct rpc_task_setup task_setup_data = {
6397 .rpc_client = server->client,
6398 .rpc_message = &msg,
6399 .callback_ops = &nfs4_layoutget_call_ops,
6400 .callback_data = lgp,
6401 .flags = RPC_TASK_ASYNC,
6402 };
a0b0a6e3 6403 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6404 int status = 0;
6405
6406 dprintk("--> %s\n", __func__);
6407
8554116e
IK		 6408 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6409 if (!lgp->args.layout.pages) {
6410 nfs4_layoutget_release(lgp);
a0b0a6e3 6411 return ERR_PTR(-ENOMEM);
8554116e
IK		 6412 }
6413 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6414
35124a09 6415 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6416 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6417 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6418 task = rpc_run_task(&task_setup_data);
6419 if (IS_ERR(task))
a0b0a6e3 6420 return ERR_CAST(task);
b1f69b75 6421 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6422 if (status == 0)
6423 status = task->tk_status;
6424 if (status == 0)
a0b0a6e3 6425 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6426 rpc_put_task(task);
6427 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6428 if (status)
6429 return ERR_PTR(status);
6430 return lseg;
b1f69b75
AA		 6431}
6432
cbe82603
BH		 6433static void
6434nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6435{
6436 struct nfs4_layoutreturn *lrp = calldata;
6437
6438 dprintk("--> %s\n", __func__);
6439 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6440 &lrp->res.seq_res, task))
cbe82603
BH		 6441 return;
6442 rpc_call_start(task);
6443}
6444
6445static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6446{
6447 struct nfs4_layoutreturn *lrp = calldata;
6448 struct nfs_server *server;
6449
6450 dprintk("--> %s\n", __func__);
6451
6452 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6453 return;
6454
6455 server = NFS_SERVER(lrp->args.inode);
6456 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6457 rpc_restart_call_prepare(task);
cbe82603
BH		 6458 return;
6459 }
cbe82603
BH		 6460 dprintk("<-- %s\n", __func__);
6461}
6462
6463static void nfs4_layoutreturn_release(void *calldata)
6464{
6465 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6466 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6467
6468 dprintk("--> %s\n", __func__);
849b286f
TM		 6469 spin_lock(&lo->plh_inode->i_lock);
6470 if (lrp->res.lrs_present)
6471 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6472 lo->plh_block_lgets--;
6473 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6474 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6475 kfree(calldata);
6476 dprintk("<-- %s\n", __func__);
6477}
6478
6479static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6480 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6481 .rpc_call_done = nfs4_layoutreturn_done,
6482 .rpc_release = nfs4_layoutreturn_release,
6483};
6484
6485int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6486{
6487 struct rpc_task *task;
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6490 .rpc_argp = &lrp->args,
6491 .rpc_resp = &lrp->res,
6492 };
6493 struct rpc_task_setup task_setup_data = {
6494 .rpc_client = lrp->clp->cl_rpcclient,
6495 .rpc_message = &msg,
6496 .callback_ops = &nfs4_layoutreturn_call_ops,
6497 .callback_data = lrp,
6498 };
6499 int status;
6500
6501 dprintk("--> %s\n", __func__);
9d12b216 6502 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6503 task = rpc_run_task(&task_setup_data);
6504 if (IS_ERR(task))
6505 return PTR_ERR(task);
6506 status = task->tk_status;
6507 dprintk("<-- %s status=%d\n", __func__, status);
6508 rpc_put_task(task);
6509 return status;
6510}
6511
7f11d8d3
AA		 6512/*
6513 * Retrieve the list of Data Server devices from the MDS.
6514 */
6515static int _nfs4_getdevicelist(struct nfs_server *server,
6516 const struct nfs_fh *fh,
6517 struct pnfs_devicelist *devlist)
6518{
6519 struct nfs4_getdevicelist_args args = {
6520 .fh = fh,
6521 .layoutclass = server->pnfs_curr_ld->id,
6522 };
6523 struct nfs4_getdevicelist_res res = {
6524 .devlist = devlist,
6525 };
6526 struct rpc_message msg = {
6527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6528 .rpc_argp = &args,
6529 .rpc_resp = &res,
6530 };
6531 int status;
6532
6533 dprintk("--> %s\n", __func__);
6534 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6535 &res.seq_res, 0);
6536 dprintk("<-- %s status=%d\n", __func__, status);
6537 return status;
6538}
6539
6540int nfs4_proc_getdevicelist(struct nfs_server *server,
6541 const struct nfs_fh *fh,
6542 struct pnfs_devicelist *devlist)
6543{
6544 struct nfs4_exception exception = { };
6545 int err;
6546
6547 do {
6548 err = nfs4_handle_exception(server,
6549 _nfs4_getdevicelist(server, fh, devlist),
6550 &exception);
6551 } while (exception.retry);
6552
6553 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6554 err, devlist->num_devs);
6555
6556 return err;
6557}
6558EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6559
b1f69b75
AA		 6560static int
6561_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6562{
6563 struct nfs4_getdeviceinfo_args args = {
6564 .pdev = pdev,
6565 };
6566 struct nfs4_getdeviceinfo_res res = {
6567 .pdev = pdev,
6568 };
6569 struct rpc_message msg = {
6570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6571 .rpc_argp = &args,
6572 .rpc_resp = &res,
6573 };
6574 int status;
6575
6576 dprintk("--> %s\n", __func__);
7c513058 6577 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6578 dprintk("<-- %s status=%d\n", __func__, status);
6579
6580 return status;
6581}
6582
6583int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6584{
6585 struct nfs4_exception exception = { };
6586 int err;
6587
6588 do {
6589 err = nfs4_handle_exception(server,
6590 _nfs4_proc_getdeviceinfo(server, pdev),
6591 &exception);
6592 } while (exception.retry);
6593 return err;
6594}
6595EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6596
863a3c6c
AA		 6597static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6598{
6599 struct nfs4_layoutcommit_data *data = calldata;
6600 struct nfs_server *server = NFS_SERVER(data->args.inode);
6601
6602 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6603 &data->res.seq_res, task))
863a3c6c
AA		 6604 return;
6605 rpc_call_start(task);
6606}
6607
6608static void
6609nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6610{
6611 struct nfs4_layoutcommit_data *data = calldata;
6612 struct nfs_server *server = NFS_SERVER(data->args.inode);
6613
6614 if (!nfs4_sequence_done(task, &data->res.seq_res))
6615 return;
6616
6617 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6618 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6619 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6620 case -NFS4ERR_BADLAYOUT: /* no layout */
6621 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6622 task->tk_status = 0;
e59d27e0
TM		 6623 break;
6624 case 0:
863a3c6c
AA		 6625 nfs_post_op_update_inode_force_wcc(data->args.inode,
6626 data->res.fattr);
e59d27e0
TM		 6627 break;
6628 default:
6629 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6630 rpc_restart_call_prepare(task);
6631 return;
6632 }
6633 }
863a3c6c
AA		 6634}
6635
6636static void nfs4_layoutcommit_release(void *calldata)
6637{
6638 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6639 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6640 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6641
db29c089 6642 pnfs_cleanup_layoutcommit(data);
863a3c6c 6643 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6644 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6645 list_del_init(&lseg->pls_lc_list);
6646 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6647 &lseg->pls_flags))
9369a431 6648 pnfs_put_lseg(lseg);
a9bae566 6649 }
92407e75
PT		 6650
6651 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6652 smp_mb__after_clear_bit();
6653 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6654
863a3c6c
AA		 6655 put_rpccred(data->cred);
6656 kfree(data);
6657}
6658
6659static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6660 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6661 .rpc_call_done = nfs4_layoutcommit_done,
6662 .rpc_release = nfs4_layoutcommit_release,
6663};
6664
6665int
ef311537 6666nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6667{
6668 struct rpc_message msg = {
6669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6670 .rpc_argp = &data->args,
6671 .rpc_resp = &data->res,
6672 .rpc_cred = data->cred,
6673 };
6674 struct rpc_task_setup task_setup_data = {
6675 .task = &data->task,
6676 .rpc_client = NFS_CLIENT(data->args.inode),
6677 .rpc_message = &msg,
6678 .callback_ops = &nfs4_layoutcommit_ops,
6679 .callback_data = data,
6680 .flags = RPC_TASK_ASYNC,
6681 };
6682 struct rpc_task *task;
6683 int status = 0;
6684
6685 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6686 "lbw: %llu inode %lu\n",
6687 data->task.tk_pid, sync,
6688 data->args.lastbytewritten,
6689 data->args.inode->i_ino);
6690
9d12b216 6691 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6692 task = rpc_run_task(&task_setup_data);
6693 if (IS_ERR(task))
6694 return PTR_ERR(task);
ef311537 6695 if (sync == false)
863a3c6c
AA		 6696 goto out;
6697 status = nfs4_wait_for_completion_rpc_task(task);
6698 if (status != 0)
6699 goto out;
6700 status = task->tk_status;
6701out:
6702 dprintk("%s: status %d\n", __func__, status);
6703 rpc_put_task(task);
6704 return status;
6705}
fca78d6d
BS		 6706
6707static int
6708_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6709 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6710{
6711 struct nfs41_secinfo_no_name_args args = {
6712 .style = SECINFO_STYLE_CURRENT_FH,
6713 };
6714 struct nfs4_secinfo_res res = {
6715 .flavors = flavors,
6716 };
6717 struct rpc_message msg = {
6718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6719 .rpc_argp = &args,
6720 .rpc_resp = &res,
6721 };
6722 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6723}
6724
6725static int
6726nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6727 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6728{
6729 struct nfs4_exception exception = { };
6730 int err;
6731 do {
6732 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6733 switch (err) {
6734 case 0:
6735 case -NFS4ERR_WRONGSEC:
6736 case -NFS4ERR_NOTSUPP:
05e9cfb4 6737 goto out;
fca78d6d
BS		 6738 default:
6739 err = nfs4_handle_exception(server, err, &exception);
6740 }
6741 } while (exception.retry);
05e9cfb4 6742out:
fca78d6d
BS		 6743 return err;
6744}
6745
6746static int
6747nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6748 struct nfs_fsinfo *info)
6749{
6750 int err;
6751 struct page *page;
6752 rpc_authflavor_t flavor;
6753 struct nfs4_secinfo_flavors *flavors;
6754
6755 page = alloc_page(GFP_KERNEL);
6756 if (!page) {
6757 err = -ENOMEM;
6758 goto out;
6759 }
6760
6761 flavors = page_address(page);
6762 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6763
6764 /*
6765 * Fall back on "guess and check" method if
6766 * the server doesn't support SECINFO_NO_NAME
6767 */
6768 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6769 err = nfs4_find_root_sec(server, fhandle, info);
6770 goto out_freepage;
6771 }
6772 if (err)
6773 goto out_freepage;
6774
6775 flavor = nfs_find_best_sec(flavors);
6776 if (err == 0)
6777 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6778
6779out_freepage:
6780 put_page(page);
6781 if (err == -EACCES)
6782 return -EPERM;
6783out:
6784 return err;
6785}
1cab0652
BS		 6786
6787static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6788{
6789 int status;
6790 struct nfs41_test_stateid_args args = {
1cab0652 6791 .stateid = stateid,
7d974794
BS		 6792 };
6793 struct nfs41_test_stateid_res res;
6794 struct rpc_message msg = {
6795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6796 .rpc_argp = &args,
6797 .rpc_resp = &res,
6798 };
1cab0652 6799
38527b15 6800 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6801 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6802 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6803 if (status != NFS_OK) {
6804 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6805 return status;
38527b15
CL		 6806 }
6807 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6808 return -res.status;
7d974794
BS		 6809}
6810
38527b15
CL		 6811/**
6812 * nfs41_test_stateid - perform a TEST_STATEID operation
6813 *
6814 * @server: server / transport on which to perform the operation
6815 * @stateid: state ID to test
6816 *
6817 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6818 * Otherwise a negative NFS4ERR value is returned if the operation
6819 * failed or the state ID is not currently valid.
6820 */
1cab0652 6821static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6822{
6823 struct nfs4_exception exception = { };
6824 int err;
6825 do {
377e507d
CL		 6826 err = _nfs41_test_stateid(server, stateid);
6827 if (err != -NFS4ERR_DELAY)
6828 break;
6829 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6830 } while (exception.retry);
6831 return err;
6832}
9aeda35f 6833
1cab0652 6834static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6835{
9aeda35f 6836 struct nfs41_free_stateid_args args = {
1cab0652 6837 .stateid = stateid,
9aeda35f
BS		 6838 };
6839 struct nfs41_free_stateid_res res;
6840 struct rpc_message msg = {
6841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6842 .rpc_argp = &args,
6843 .rpc_resp = &res,
6844 };
38527b15 6845 int status;
9aeda35f 6846
38527b15 6847 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6848 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6849 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6850 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6851 dprintk("NFS reply free_stateid: %d\n", status);
6852 return status;
9aeda35f
BS		 6853}
6854
38527b15
CL		 6855/**
6856 * nfs41_free_stateid - perform a FREE_STATEID operation
6857 *
6858 * @server: server / transport on which to perform the operation
6859 * @stateid: state ID to release
6860 *
6861 * Returns NFS_OK if the server freed "stateid". Otherwise a
6862 * negative NFS4ERR value is returned.
6863 */
1cab0652 6864static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6865{
6866 struct nfs4_exception exception = { };
6867 int err;
6868 do {
377e507d
CL		 6869 err = _nfs4_free_stateid(server, stateid);
6870 if (err != -NFS4ERR_DELAY)
6871 break;
6872 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6873 } while (exception.retry);
6874 return err;
6875}
36281caa
TM		 6876
6877static bool nfs41_match_stateid(const nfs4_stateid *s1,
6878 const nfs4_stateid *s2)
6879{
2d2f24ad 6880 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6881 return false;
6882
2d2f24ad 6883 if (s1->seqid == s2->seqid)
36281caa 6884 return true;
2d2f24ad 6885 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6886 return true;
6887
6888 return false;
6889}
6890
557134a3
AA		 6891#endif /* CONFIG_NFS_V4_1 */
6892
36281caa
TM		 6893static bool nfs4_match_stateid(const nfs4_stateid *s1,
6894 const nfs4_stateid *s2)
6895{
f597c537 6896 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6897}
6898
6899
17280175 6900static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6901 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6902 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6903 .recover_open = nfs4_open_reclaim,
6904 .recover_lock = nfs4_lock_reclaim,
591d71cb 6905 .establish_clid = nfs4_init_clientid,
90a16617 6906 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6907 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6908};
6909
591d71cb 6910#if defined(CONFIG_NFS_V4_1)
17280175 6911static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6912 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6913 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6914 .recover_open = nfs4_open_reclaim,
6915 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6916 .establish_clid = nfs41_init_clientid,
b4b82607 6917 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6918 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6919 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6920};
6921#endif /* CONFIG_NFS_V4_1 */
6922
17280175 6923static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6924 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6925 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6926 .recover_open = nfs4_open_expired,
6927 .recover_lock = nfs4_lock_expired,
6928 .establish_clid = nfs4_init_clientid,
90a16617 6929 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6930};
6931
6932#if defined(CONFIG_NFS_V4_1)
17280175 6933static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6934 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6935 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6936 .recover_open = nfs41_open_expired,
6937 .recover_lock = nfs41_lock_expired,
4d643d1d 6938 .establish_clid = nfs41_init_clientid,
b4b82607 6939 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6940};
591d71cb 6941#endif /* CONFIG_NFS_V4_1 */
1da177e4 6942
17280175 6943static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6944 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6945 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6946 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6947};
6948
6949#if defined(CONFIG_NFS_V4_1)
17280175 6950static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6951 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6952 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6953 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6954};
6955#endif
6956
97dc1359
TM		 6957static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6958 .minor_version = 0,
6959 .call_sync = _nfs4_call_sync,
36281caa 6960 .match_stateid = nfs4_match_stateid,
fca78d6d 6961 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6962 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6963 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6964 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6965};
6966
6967#if defined(CONFIG_NFS_V4_1)
6968static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6969 .minor_version = 1,
6970 .call_sync = _nfs4_call_sync_session,
36281caa 6971 .match_stateid = nfs41_match_stateid,
fca78d6d 6972 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6973 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6974 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6975 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6976};
6977#endif
6978
97dc1359
TM		 6979const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6980 [0] = &nfs_v4_0_minor_ops,
6981#if defined(CONFIG_NFS_V4_1)
6982 [1] = &nfs_v4_1_minor_ops,
6983#endif
6984};
6985
73a79706
BS		 6986const struct inode_operations nfs4_dir_inode_operations = {
6987 .create = nfs_create,
6988 .lookup = nfs_lookup,
6989 .atomic_open = nfs_atomic_open,
6990 .link = nfs_link,
6991 .unlink = nfs_unlink,
6992 .symlink = nfs_symlink,
6993 .mkdir = nfs_mkdir,
6994 .rmdir = nfs_rmdir,
6995 .mknod = nfs_mknod,
6996 .rename = nfs_rename,
6997 .permission = nfs_permission,
6998 .getattr = nfs_getattr,
6999 .setattr = nfs_setattr,
7000 .getxattr = generic_getxattr,
7001 .setxattr = generic_setxattr,
7002 .listxattr = generic_listxattr,
7003 .removexattr = generic_removexattr,
7004};
7005
92e1d5be 7006static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7007 .permission = nfs_permission,
7008 .getattr = nfs_getattr,
7009 .setattr = nfs_setattr,
64c2ce8b
AK		 7010 .getxattr = generic_getxattr,
7011 .setxattr = generic_setxattr,
7012 .listxattr = generic_listxattr,
7013 .removexattr = generic_removexattr,
6b3b5496
BF		 7014};
7015
509de811 7016const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7017 .version = 4, /* protocol version */
7018 .dentry_ops = &nfs4_dentry_operations,
7019 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7020 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7021 .file_ops = &nfs4_file_operations,
1da177e4 7022 .getroot = nfs4_proc_get_root,
281cad46 7023 .submount = nfs4_submount,
ff9099f2 7024 .try_mount = nfs4_try_mount,
1da177e4
LT		 7025 .getattr = nfs4_proc_getattr,
7026 .setattr = nfs4_proc_setattr,
7027 .lookup = nfs4_proc_lookup,
7028 .access = nfs4_proc_access,
7029 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7030 .create = nfs4_proc_create,
7031 .remove = nfs4_proc_remove,
7032 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7033 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7034 .unlink_done = nfs4_proc_unlink_done,
7035 .rename = nfs4_proc_rename,
d3d4152a 7036 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7037 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7038 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7039 .link = nfs4_proc_link,
7040 .symlink = nfs4_proc_symlink,
7041 .mkdir = nfs4_proc_mkdir,
7042 .rmdir = nfs4_proc_remove,
7043 .readdir = nfs4_proc_readdir,
7044 .mknod = nfs4_proc_mknod,
7045 .statfs = nfs4_proc_statfs,
7046 .fsinfo = nfs4_proc_fsinfo,
7047 .pathconf = nfs4_proc_pathconf,
e9326dca 7048 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7049 .decode_dirent = nfs4_decode_dirent,
7050 .read_setup = nfs4_proc_read_setup,
1abb5088 7051 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7052 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7053 .read_done = nfs4_read_done,
1da177e4 7054 .write_setup = nfs4_proc_write_setup,
57208fa7 7055 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7056 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7057 .write_done = nfs4_write_done,
1da177e4 7058 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7059 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7060 .commit_done = nfs4_commit_done,
1da177e4 7061 .lock = nfs4_proc_lock,
e50a1c2e 7062 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7063 .close_context = nfs4_close_context,
2b484297 7064 .open_context = nfs4_atomic_open,
011e2a7f 7065 .have_delegation = nfs4_have_delegation,
57ec14c5 7066 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7067 .alloc_client = nfs4_alloc_client,
45a52a02 7068 .init_client = nfs4_init_client,
cdb7eced 7069 .free_client = nfs4_free_client,
1179acc6
BS		 7070 .create_server = nfs4_create_server,
7071 .clone_server = nfs_clone_server,
1da177e4
LT		 7072};
7073
64c2ce8b
AK		 7074static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7075 .prefix = XATTR_NAME_NFSV4_ACL,
7076 .list = nfs4_xattr_list_nfs4_acl,
7077 .get = nfs4_xattr_get_nfs4_acl,
7078 .set = nfs4_xattr_set_nfs4_acl,
7079};
7080
7081const struct xattr_handler *nfs4_xattr_handlers[] = {
7082 &nfs4_xattr_nfs4_acl_handler,
7083 NULL
7084};
7085
1da177e4
LT		 7086/*
7087 * Local variables:
7088 * c-basic-offset: 8
7089 * End:
7090 */
Linux 6.x block layer and io_uring tree(s)