projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1: clean up nfs4_recall_slot to use nfs4_alloc_slots
[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
e23008ec
AA		 155static const u32 nfs4_open_noattr_bitmap[3] = {
156 FATTR4_WORD0_TYPE
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID,
159};
160
1da177e4
LT		 161const u32 nfs4_statfs_bitmap[2] = {
162 FATTR4_WORD0_FILES_AVAIL
163 | FATTR4_WORD0_FILES_FREE
164 | FATTR4_WORD0_FILES_TOTAL,
165 FATTR4_WORD1_SPACE_AVAIL
166 | FATTR4_WORD1_SPACE_FREE
167 | FATTR4_WORD1_SPACE_TOTAL
168};
169
4ce79717 170const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 171 FATTR4_WORD0_MAXLINK
172 | FATTR4_WORD0_MAXNAME,
173 0
174};
175
dae100c2 176const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 177 | FATTR4_WORD0_MAXREAD
178 | FATTR4_WORD0_MAXWRITE
179 | FATTR4_WORD0_LEASE_TIME,
55b6e774 180 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 181 | FATTR4_WORD1_FS_LAYOUT_TYPES,
182 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 183};
184
830b8e33
MN		 185const u32 nfs4_fs_locations_bitmap[2] = {
186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID
191 | FATTR4_WORD0_FS_LOCATIONS,
192 FATTR4_WORD1_MODE
193 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER
195 | FATTR4_WORD1_OWNER_GROUP
196 | FATTR4_WORD1_RAWDEV
197 | FATTR4_WORD1_SPACE_USED
198 | FATTR4_WORD1_TIME_ACCESS
199 | FATTR4_WORD1_TIME_METADATA
200 | FATTR4_WORD1_TIME_MODIFY
201 | FATTR4_WORD1_MOUNTED_ON_FILEID
202};
203
bc4785cd 204static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 205 struct nfs4_readdir_arg *readdir)
206{
0dbb4c67 207 __be32 *start, *p;
1da177e4 208
1da177e4 209 if (cookie > 2) {
b7ef1956 210 readdir->cookie = cookie;
1da177e4
LT		 211 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
212 return;
213 }
214
215 readdir->cookie = 0;
216 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
217 if (cookie == 2)
218 return;
219
220 /*
221 * NFSv4 servers do not return entries for '.' and '..'
222 * Therefore, we fake these entries here. We let '.'
223 * have cookie 0 and '..' have cookie 1. Note that
224 * when talking to the server, we always send cookie 0
225 * instead of 1 or 2.
226 */
2b86ce2d 227 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 228
229 if (cookie == 0) {
230 *p++ = xdr_one; /* next */
231 *p++ = xdr_zero; /* cookie, first word */
232 *p++ = xdr_one; /* cookie, second word */
233 *p++ = xdr_one; /* entry len */
234 memcpy(p, ".\0\0\0", 4); /* entry */
235 p++;
236 *p++ = xdr_one; /* bitmap length */
237 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
238 *p++ = htonl(8); /* attribute buffer length */
4e769b93 239 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 240 }
241
242 *p++ = xdr_one; /* next */
243 *p++ = xdr_zero; /* cookie, first word */
244 *p++ = xdr_two; /* cookie, second word */
245 *p++ = xdr_two; /* entry len */
246 memcpy(p, "..\0\0", 4); /* entry */
247 p++;
248 *p++ = xdr_one; /* bitmap length */
249 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
250 *p++ = htonl(8); /* attribute buffer length */
4e769b93 251 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 252
253 readdir->pgbase = (char *)p - (char *)start;
254 readdir->count -= readdir->pgbase;
2b86ce2d 255 kunmap_atomic(start);
1da177e4
LT		 256}
257
65de872e
TM		 258static int nfs4_wait_clnt_recover(struct nfs_client *clp)
259{
260 int res;
261
262 might_sleep();
263
e005e804 264 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 265 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 266 if (res)
267 return res;
268
269 if (clp->cl_cons_state < 0)
270 return clp->cl_cons_state;
271 return 0;
65de872e
TM		 272}
273
274static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
275{
276 int res = 0;
277
278 might_sleep();
279
280 if (*timeout <= 0)
281 *timeout = NFS4_POLL_RETRY_MIN;
282 if (*timeout > NFS4_POLL_RETRY_MAX)
283 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 284 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 285 if (fatal_signal_pending(current))
286 res = -ERESTARTSYS;
287 *timeout <<= 1;
288 return res;
289}
290
291/* This is the error handling routine for processes that are allowed
292 * to sleep.
293 */
b064eca2 294static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 295{
296 struct nfs_client *clp = server->nfs_client;
9e33bed5 297 struct nfs4_state *state = exception->state;
3114ea7a 298 struct inode *inode = exception->inode;
65de872e
TM		 299 int ret = errorcode;
300
301 exception->retry = 0;
302 switch(errorcode) {
303 case 0:
304 return 0;
3114ea7a 305 case -NFS4ERR_OPENMODE:
011e2a7f 306 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 307 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 308 exception->retry = 1;
309 return 0;
310 }
311 if (state == NULL)
312 break;
313 nfs4_schedule_stateid_recovery(server, state);
314 goto wait_on_recovery;
a1d0b5ee 315 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 316 case -NFS4ERR_ADMIN_REVOKED:
317 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 318 if (state == NULL)
319 break;
14977489 320 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 321 nfs4_schedule_stateid_recovery(server, state);
322 goto wait_on_recovery;
0ced63d1
TM		 323 case -NFS4ERR_EXPIRED:
324 if (state != NULL)
325 nfs4_schedule_stateid_recovery(server, state);
65de872e 326 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 327 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
03391693 330#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
339 errorcode);
9f594791 340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 341 goto wait_on_recovery;
03391693 342#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 343 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
346 * fail
347 */
348 ret = -EBUSY;
349 break;
350 }
65de872e
TM		 351 case -NFS4ERR_GRACE:
352 case -NFS4ERR_DELAY:
2c643488 353 case -EKEYEXPIRED:
65de872e
TM		 354 ret = nfs4_delay(server->client, &exception->timeout);
355 if (ret != 0)
356 break;
a8a4ae3a 357 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 358 case -NFS4ERR_OLD_STATEID:
359 exception->retry = 1;
b064eca2
TM		 360 break;
361 case -NFS4ERR_BADOWNER:
362 /* The following works around a Linux server bug! */
363 case -NFS4ERR_BADNAME:
364 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
365 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
366 exception->retry = 1;
367 printk(KERN_WARNING "NFS: v4 server %s "
368 "does not accept raw "
369 "uid/gids. "
370 "Reenabling the idmapper.\n",
371 server->nfs_client->cl_hostname);
372 }
65de872e
TM		 373 }
374 /* We failed to handle the error */
375 return nfs4_map_errors(ret);
0400a6b0 376wait_on_recovery:
a2c0b9e2
TM		 377 ret = nfs4_wait_clnt_recover(clp);
378 if (ret == 0)
379 exception->retry = 1;
380 return ret;
65de872e
TM		 381}
382
383
452e9352 384static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 385{
1da177e4
LT		 386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal,timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
390}
391
452e9352
TM		 392static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
393{
394 do_renew_lease(server->nfs_client, timestamp);
395}
396
cccef3b9
AA		 397#if defined(CONFIG_NFS_V4_1)
398
e2c4ab3c
AA		 399/*
400 * nfs4_free_slot - free a slot and efficiently update slot table.
401 *
402 * freeing a slot is trivially done by clearing its respective bit
403 * in the bitmap.
404 * If the freed slotid equals highest_used_slotid we want to update it
405 * so that the server would be able to size down the slot table if needed,
406 * otherwise we know that the highest_used_slotid is still in use.
407 * When updating highest_used_slotid there may be "holes" in the bitmap
408 * so we need to scan down from highest_used_slotid to 0 looking for the now
409 * highest slotid in use.
45d43c29 410 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 411 *
412 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 413 */
414static void
45d43c29 415nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 416{
e2c4ab3c
AA		 417 /* clear used bit in bitmap */
418 __clear_bit(slotid, tbl->used_slots);
419
420 /* update highest_used_slotid when it is freed */
421 if (slotid == tbl->highest_used_slotid) {
422 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 423 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 424 tbl->highest_used_slotid = slotid;
425 else
45d43c29 426 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 427 }
45d43c29
TM		 428 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
429 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 430}
431
961a828d
TM		 432bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
433{
434 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
435 return true;
e2c4ab3c
AA		 436}
437
3bfb0fc5 438/*
42acd021 439 * Signal state manager thread if session fore channel is drained
3bfb0fc5 440 */
42acd021 441static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 442{
a2118c33 443 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 444 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
445 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 446 return;
447 }
448
45d43c29 449 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 450 return;
451
42acd021
AA		 452 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
453 complete(&ses->fc_slot_table.complete);
454}
455
456/*
457 * Signal state manager thread if session back channel is drained
458 */
459void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
460{
461 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 462 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 463 return;
464 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
465 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 466}
467
d185a334 468static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 469{
470 struct nfs4_slot_table *tbl;
471
d185a334 472 tbl = &res->sr_session->fc_slot_table;
dfb4f309 473 if (!res->sr_slot) {
13615871
AA		 474 /* just wake up the next guy waiting since
475 * we may have not consumed a slot after all */
691daf3b 476 dprintk("%s: No slot\n", __func__);
35dc1d74 477 return;
13615871 478 }
ea028ac9 479
35dc1d74 480 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 481 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 482 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 483 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 484 res->sr_slot = NULL;
13615871
AA		 485}
486
14516c3a 487static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 488{
489 unsigned long timestamp;
14516c3a 490 struct nfs_client *clp;
b0df806c
AA		 491
492 /*
493 * sr_status remains 1 if an RPC level error occurred. The server
494 * may or may not have processed the sequence operation..
495 * Proceed as if the server received and processed the sequence
496 * operation.
497 */
498 if (res->sr_status == 1)
499 res->sr_status = NFS_OK;
500
468f8613
BS		 501 /* don't increment the sequence number if the task wasn't sent */
502 if (!RPC_WAS_SENT(task))
b0df806c
AA		 503 goto out;
504
691daf3b 505 /* Check the SEQUENCE operation status */
14516c3a
TM		 506 switch (res->sr_status) {
507 case 0:
b0df806c 508 /* Update the slot's sequence and clientid lease timer */
dfb4f309 509 ++res->sr_slot->seq_nr;
b0df806c 510 timestamp = res->sr_renewal_time;
14516c3a 511 clp = res->sr_session->clp;
452e9352 512 do_renew_lease(clp, timestamp);
0629e370 513 /* Check sequence flags */
b4410c2f
TM		 514 if (res->sr_status_flags != 0)
515 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 516 break;
517 case -NFS4ERR_DELAY:
518 /* The server detected a resend of the RPC call and
519 * returned NFS4ERR_DELAY as per Section 2.10.6.2
520 * of RFC5661.
521 */
12364a4f 522 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 523 __func__,
524 res->sr_slot - res->sr_session->fc_slot_table.slots,
525 res->sr_slot->seq_nr);
14516c3a
TM		 526 goto out_retry;
527 default:
528 /* Just update the slot sequence no. */
dfb4f309 529 ++res->sr_slot->seq_nr;
b0df806c
AA		 530 }
531out:
532 /* The session may be reset by one of the error handlers. */
533 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 534 nfs41_sequence_free_slot(res);
14516c3a
TM		 535 return 1;
536out_retry:
d05dd4e9 537 if (!rpc_restart_call(task))
14516c3a
TM		 538 goto out;
539 rpc_delay(task, NFS4_POLL_RETRY_MAX);
540 return 0;
b0df806c
AA		 541}
542
14516c3a
TM		 543static int nfs4_sequence_done(struct rpc_task *task,
544 struct nfs4_sequence_res *res)
df896455 545{
14516c3a
TM		 546 if (res->sr_session == NULL)
547 return 1;
548 return nfs41_sequence_done(task, res);
df896455
TM		 549}
550
510b8175
BH		 551/*
552 * nfs4_find_slot - efficiently look for a free slot
553 *
554 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
555 * If found, we mark the slot as used, update the highest_used_slotid,
556 * and respectively set up the sequence operation args.
45d43c29 557 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 558 *
559 * Note: must be called with under the slot_tbl_lock.
510b8175 560 */
45d43c29 561static u32
40ead580 562nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 563{
45d43c29
TM		 564 u32 slotid;
565 u32 ret_id = NFS4_NO_SLOT;
510b8175 566
45d43c29 567 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 568 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
569 tbl->max_slots);
570 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
571 if (slotid >= tbl->max_slots)
572 goto out;
573 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 574 if (slotid > tbl->highest_used_slotid ||
575 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 576 tbl->highest_used_slotid = slotid;
577 ret_id = slotid;
578out:
579 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
580 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 581 return ret_id;
582}
583
9d12b216
TM		 584static void nfs41_init_sequence(struct nfs4_sequence_args *args,
585 struct nfs4_sequence_res *res, int cache_reply)
586{
587 args->sa_session = NULL;
588 args->sa_cache_this = 0;
589 if (cache_reply)
590 args->sa_cache_this = 1;
591 res->sr_session = NULL;
592 res->sr_slot = NULL;
593}
594
dc70d7b3 595int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 596 struct nfs4_sequence_args *args,
597 struct nfs4_sequence_res *res,
ce5039c1
AA		 598 struct rpc_task *task)
599{
fbcd4abc
AA		 600 struct nfs4_slot *slot;
601 struct nfs4_slot_table *tbl;
45d43c29 602 u32 slotid;
fbcd4abc
AA		 603
604 dprintk("--> %s\n", __func__);
ce5039c1 605 /* slot already allocated? */
dfb4f309 606 if (res->sr_slot != NULL)
ce5039c1
AA		 607 return 0;
608
fbcd4abc
AA		 609 tbl = &session->fc_slot_table;
610
611 spin_lock(&tbl->slot_tbl_lock);
a2118c33 612 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 613 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 614 /* The state manager will wait until the slot table is empty */
05f0d236 615 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 616 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 617 dprintk("%s session is draining\n", __func__);
05f0d236 618 return -EAGAIN;
b069d94a
AA		 619 }
620
689cf5c1
AB		 621 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
622 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
623 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
624 spin_unlock(&tbl->slot_tbl_lock);
625 dprintk("%s enforce FIFO order\n", __func__);
626 return -EAGAIN;
627 }
628
40ead580 629 slotid = nfs4_find_slot(tbl);
45d43c29 630 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 631 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
632 spin_unlock(&tbl->slot_tbl_lock);
633 dprintk("<-- %s: no free slots\n", __func__);
634 return -EAGAIN;
635 }
636 spin_unlock(&tbl->slot_tbl_lock);
637
689cf5c1 638 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 639 slot = tbl->slots + slotid;
99fe60d0 640 args->sa_session = session;
fbcd4abc 641 args->sa_slotid = slotid;
fbcd4abc
AA		 642
643 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
644
99fe60d0 645 res->sr_session = session;
dfb4f309 646 res->sr_slot = slot;
fbcd4abc 647 res->sr_renewal_time = jiffies;
2a6e26cd 648 res->sr_status_flags = 0;
fbcd4abc
AA		 649 /*
650 * sr_status is only set in decode_sequence, and so will remain
651 * set to 1 if an rpc level failure occurs.
652 */
653 res->sr_status = 1;
ce5039c1
AA		 654 return 0;
655}
dc70d7b3 656EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 657
035168ab 658int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 659 struct nfs4_sequence_args *args,
660 struct nfs4_sequence_res *res,
ce5039c1
AA		 661 struct rpc_task *task)
662{
035168ab 663 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 664 int ret = 0;
665
9d12b216 666 if (session == NULL)
035168ab 667 goto out;
035168ab 668
12364a4f 669 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 670 __func__, session->clp, session, res->sr_slot ?
671 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 672
9d12b216 673 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 674out:
675 dprintk("<-- %s status=%d\n", __func__, ret);
676 return ret;
677}
678
679struct nfs41_call_sync_data {
035168ab 680 const struct nfs_server *seq_server;
ce5039c1
AA		 681 struct nfs4_sequence_args *seq_args;
682 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 683};
684
685static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
686{
687 struct nfs41_call_sync_data *data = calldata;
688
035168ab
TM		 689 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
690
691 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 692 data->seq_res, task))
ce5039c1
AA		 693 return;
694 rpc_call_start(task);
695}
696
b257957e
AB		 697static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
698{
699 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
700 nfs41_call_sync_prepare(task, calldata);
701}
702
69ab40c4
AA		 703static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
704{
705 struct nfs41_call_sync_data *data = calldata;
706
14516c3a 707 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 708}
709
17280175 710static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 711 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 712 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 713};
714
17280175 715static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 716 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
717 .rpc_call_done = nfs41_call_sync_done,
718};
719
7c513058
BS		 720static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
721 struct nfs_server *server,
ce5039c1
AA		 722 struct rpc_message *msg,
723 struct nfs4_sequence_args *args,
724 struct nfs4_sequence_res *res,
b257957e 725 int privileged)
ce5039c1
AA		 726{
727 int ret;
728 struct rpc_task *task;
729 struct nfs41_call_sync_data data = {
035168ab 730 .seq_server = server,
ce5039c1
AA		 731 .seq_args = args,
732 .seq_res = res,
ce5039c1
AA		 733 };
734 struct rpc_task_setup task_setup = {
7c513058 735 .rpc_client = clnt,
ce5039c1
AA		 736 .rpc_message = msg,
737 .callback_ops = &nfs41_call_sync_ops,
738 .callback_data = &data
739 };
740
b257957e
AB		 741 if (privileged)
742 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 743 task = rpc_run_task(&task_setup);
744 if (IS_ERR(task))
745 ret = PTR_ERR(task);
746 else {
747 ret = task->tk_status;
748 rpc_put_task(task);
749 }
750 return ret;
751}
752
7c513058
BS		 753int _nfs4_call_sync_session(struct rpc_clnt *clnt,
754 struct nfs_server *server,
cccef3b9
AA		 755 struct rpc_message *msg,
756 struct nfs4_sequence_args *args,
757 struct nfs4_sequence_res *res,
758 int cache_reply)
759{
9d12b216
TM		 760 nfs41_init_sequence(args, res, cache_reply);
761 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 762}
763
df896455 764#else
9d12b216
TM		 765static inline
766void nfs41_init_sequence(struct nfs4_sequence_args *args,
767 struct nfs4_sequence_res *res, int cache_reply)
768{
769}
770
14516c3a
TM		 771static int nfs4_sequence_done(struct rpc_task *task,
772 struct nfs4_sequence_res *res)
df896455 773{
14516c3a 774 return 1;
df896455 775}
cccef3b9
AA		 776#endif /* CONFIG_NFS_V4_1 */
777
7c513058
BS		 778int _nfs4_call_sync(struct rpc_clnt *clnt,
779 struct nfs_server *server,
cccef3b9
AA		 780 struct rpc_message *msg,
781 struct nfs4_sequence_args *args,
782 struct nfs4_sequence_res *res,
783 int cache_reply)
784{
9d12b216 785 nfs41_init_sequence(args, res, cache_reply);
7c513058 786 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 787}
788
e73b83f2 789static inline
7c513058
BS		 790int nfs4_call_sync(struct rpc_clnt *clnt,
791 struct nfs_server *server,
e73b83f2
BS		 792 struct rpc_message *msg,
793 struct nfs4_sequence_args *args,
794 struct nfs4_sequence_res *res,
795 int cache_reply)
796{
7c513058
BS		 797 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
798 args, res, cache_reply);
e73b83f2 799}
cccef3b9 800
38478b24 801static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 802{
38478b24 803 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 804
38478b24 805 spin_lock(&dir->i_lock);
359d7d1c 806 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 807 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 808 nfs_force_lookup_revalidate(dir);
a9a4a87a 809 dir->i_version = cinfo->after;
38478b24 810 spin_unlock(&dir->i_lock);
1da177e4
LT		 811}
812
e56e0b78 813struct nfs4_opendata {
c6d00e63 814 struct kref kref;
e56e0b78
TM		 815 struct nfs_openargs o_arg;
816 struct nfs_openres o_res;
cdd4e68b
TM		 817 struct nfs_open_confirmargs c_arg;
818 struct nfs_open_confirmres c_res;
6926afd1
TM		 819 struct nfs4_string owner_name;
820 struct nfs4_string group_name;
e56e0b78 821 struct nfs_fattr f_attr;
e56e0b78 822 struct dentry *dir;
82a2c1b7 823 struct dentry *dentry;
e56e0b78 824 struct nfs4_state_owner *owner;
aac00a8d 825 struct nfs4_state *state;
e56e0b78 826 struct iattr attrs;
26e976a8 827 unsigned long timestamp;
3e309914 828 unsigned int rpc_done : 1;
24ac23ab
TM		 829 int rpc_status;
830 int cancelled;
e56e0b78
TM		 831};
832
2ced46c2
TM		 833
834static void nfs4_init_opendata_res(struct nfs4_opendata *p)
835{
836 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 837 p->o_res.seqid = p->o_arg.seqid;
838 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 839 p->o_res.server = p->o_arg.server;
5f657530 840 p->o_res.access_request = p->o_arg.access;
2ced46c2 841 nfs_fattr_init(&p->f_attr);
6926afd1 842 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 843}
844
82a2c1b7 845static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 846 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 847 const struct iattr *attrs,
848 gfp_t gfp_mask)
e56e0b78 849{
82a2c1b7 850 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 851 struct inode *dir = parent->d_inode;
852 struct nfs_server *server = NFS_SERVER(dir);
853 struct nfs4_opendata *p;
854
8535b2be 855 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 856 if (p == NULL)
857 goto err;
8535b2be 858 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 859 if (p->o_arg.seqid == NULL)
860 goto err_free;
82a2c1b7
AV		 861 nfs_sb_active(dentry->d_sb);
862 p->dentry = dget(dentry);
e56e0b78
TM		 863 p->dir = parent;
864 p->owner = sp;
865 atomic_inc(&sp->so_count);
866 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 867 p->o_arg.open_flags = flags;
868 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 869 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
870 * will return permission denied for all bits until close */
871 if (!(flags & O_EXCL)) {
872 /* ask server to check for all possible rights as results
873 * are cached */
874 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
875 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 876 }
7539bbab 877 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 878 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
879 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 880 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 881 p->o_arg.server = server;
882 p->o_arg.bitmask = server->attr_bitmask;
1549210f 883 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 884 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 885 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 886 __be32 verf[2];
d77d76ff 887
e56e0b78
TM		 888 p->o_arg.u.attrs = &p->attrs;
889 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 890
891 verf[0] = jiffies;
892 verf[1] = current->pid;
893 memcpy(p->o_arg.u.verifier.data, verf,
894 sizeof(p->o_arg.u.verifier.data));
e56e0b78 895 }
cdd4e68b
TM		 896 p->c_arg.fh = &p->o_res.fh;
897 p->c_arg.stateid = &p->o_res.stateid;
898 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 899 nfs4_init_opendata_res(p);
c6d00e63 900 kref_init(&p->kref);
e56e0b78
TM		 901 return p;
902err_free:
903 kfree(p);
904err:
905 dput(parent);
906 return NULL;
907}
908
c6d00e63 909static void nfs4_opendata_free(struct kref *kref)
e56e0b78 910{
c6d00e63
TM		 911 struct nfs4_opendata *p = container_of(kref,
912 struct nfs4_opendata, kref);
82a2c1b7 913 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 914
915 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 916 if (p->state != NULL)
917 nfs4_put_open_state(p->state);
c6d00e63
TM		 918 nfs4_put_state_owner(p->owner);
919 dput(p->dir);
82a2c1b7
AV		 920 dput(p->dentry);
921 nfs_sb_deactive(sb);
6926afd1 922 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 923 kfree(p);
924}
925
926static void nfs4_opendata_put(struct nfs4_opendata *p)
927{
928 if (p != NULL)
929 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 930}
931
06f814a3
TM		 932static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
933{
06f814a3
TM		 934 int ret;
935
06f814a3 936 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 937 return ret;
938}
939
dc0b027d 940static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 941{
942 int ret = 0;
dc0b027d 943
536e43d1 944 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 945 goto out;
946 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 947 case FMODE_READ:
88069f77
TM		 948 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
949 && state->n_rdonly != 0;
6ee41268
TM		 950 break;
951 case FMODE_WRITE:
88069f77
TM		 952 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
953 && state->n_wronly != 0;
6ee41268
TM		 954 break;
955 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 956 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
957 && state->n_rdwr != 0;
6ee41268 958 }
dc0b027d 959out:
6ee41268
TM		 960 return ret;
961}
962
dc0b027d 963static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 964{
652f89f6
TM		 965 if (delegation == NULL)
966 return 0;
dc0b027d 967 if ((delegation->type & fmode) != fmode)
aac00a8d 968 return 0;
15c831bf 969 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 970 return 0;
b7391f44 971 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 972 return 1;
973}
974
dc0b027d 975static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 976{
dc0b027d 977 switch (fmode) {
e7616923
TM		 978 case FMODE_WRITE:
979 state->n_wronly++;
980 break;
981 case FMODE_READ:
982 state->n_rdonly++;
983 break;
984 case FMODE_READ|FMODE_WRITE:
985 state->n_rdwr++;
986 }
dc0b027d 987 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 988}
989
dc0b027d 990static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 991{
992 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 993 nfs4_stateid_copy(&state->stateid, stateid);
994 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 995 switch (fmode) {
003707c7
TM		 996 case FMODE_READ:
997 set_bit(NFS_O_RDONLY_STATE, &state->flags);
998 break;
999 case FMODE_WRITE:
1000 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1001 break;
1002 case FMODE_READ|FMODE_WRITE:
1003 set_bit(NFS_O_RDWR_STATE, &state->flags);
1004 }
e7616923
TM		 1005}
1006
dc0b027d 1007static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1008{
8bda4e4c 1009 write_seqlock(&state->seqlock);
dc0b027d 1010 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1011 write_sequnlock(&state->seqlock);
003707c7
TM		 1012}
1013
dc0b027d 1014static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1015{
8bda4e4c
TM		 1016 /*
1017 * Protect the call to nfs4_state_set_mode_locked and
1018 * serialise the stateid update
1019 */
1020 write_seqlock(&state->seqlock);
003707c7 1021 if (deleg_stateid != NULL) {
f597c537 1022 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1023 set_bit(NFS_DELEGATED_STATE, &state->flags);
1024 }
1025 if (open_stateid != NULL)
dc0b027d 1026 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1027 write_sequnlock(&state->seqlock);
1028 spin_lock(&state->owner->so_lock);
dc0b027d 1029 update_open_stateflags(state, fmode);
ec073428 1030 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1031}
1032
dc0b027d 1033static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1034{
1035 struct nfs_inode *nfsi = NFS_I(state->inode);
1036 struct nfs_delegation *deleg_cur;
1037 int ret = 0;
1038
dc0b027d 1039 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1040
1041 rcu_read_lock();
1042 deleg_cur = rcu_dereference(nfsi->delegation);
1043 if (deleg_cur == NULL)
1044 goto no_delegation;
1045
1046 spin_lock(&deleg_cur->lock);
1047 if (nfsi->delegation != deleg_cur ||
dc0b027d 1048 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1049 goto no_delegation_unlock;
1050
1051 if (delegation == NULL)
1052 delegation = &deleg_cur->stateid;
f597c537 1053 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1054 goto no_delegation_unlock;
1055
b7391f44 1056 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1057 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1058 ret = 1;
1059no_delegation_unlock:
1060 spin_unlock(&deleg_cur->lock);
1061no_delegation:
1062 rcu_read_unlock();
1063
1064 if (!ret && open_stateid != NULL) {
dc0b027d 1065 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1066 ret = 1;
1067 }
1068
1069 return ret;
1070}
1071
1072
dc0b027d 1073static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1074{
1075 struct nfs_delegation *delegation;
1076
1077 rcu_read_lock();
1078 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1079 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1080 rcu_read_unlock();
1081 return;
1082 }
1083 rcu_read_unlock();
57ec14c5 1084 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1085}
1086
6ee41268 1087static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1088{
1089 struct nfs4_state *state = opendata->state;
1090 struct nfs_inode *nfsi = NFS_I(state->inode);
1091 struct nfs_delegation *delegation;
536e43d1 1092 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1093 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1094 nfs4_stateid stateid;
1095 int ret = -EAGAIN;
1096
aac00a8d 1097 for (;;) {
dc0b027d 1098 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1099 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1100 if (can_open_cached(state, fmode, open_mode)) {
1101 update_open_stateflags(state, fmode);
6ee41268 1102 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1103 goto out_return_state;
1104 }
1105 spin_unlock(&state->owner->so_lock);
1106 }
34310430
TM		 1107 rcu_read_lock();
1108 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1109 if (!can_open_delegated(delegation, fmode)) {
34310430 1110 rcu_read_unlock();
aac00a8d 1111 break;
34310430 1112 }
aac00a8d 1113 /* Save the delegation */
f597c537 1114 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1115 rcu_read_unlock();
af22f94a 1116 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1117 if (ret != 0)
1118 goto out;
1119 ret = -EAGAIN;
34310430
TM		 1120
1121 /* Try to update the stateid using the delegation */
dc0b027d 1122 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1123 goto out_return_state;
aac00a8d 1124 }
aac00a8d
TM		 1125out:
1126 return ERR_PTR(ret);
1127out_return_state:
1128 atomic_inc(&state->count);
1129 return state;
1130}
1131
e23008ec
AA		 1132static void
1133nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1134{
1135 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1136 struct nfs_delegation *delegation;
1137 int delegation_flags = 0;
1138
1139 rcu_read_lock();
1140 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1141 if (delegation)
1142 delegation_flags = delegation->flags;
1143 rcu_read_unlock();
1144 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1145 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1146 "returning a delegation for "
1147 "OPEN(CLAIM_DELEGATE_CUR)\n",
1148 clp->cl_hostname);
1149 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1150 nfs_inode_set_delegation(state->inode,
1151 data->owner->so_cred,
1152 &data->o_res);
1153 else
1154 nfs_inode_reclaim_delegation(state->inode,
1155 data->owner->so_cred,
1156 &data->o_res);
1157}
1158
1159/*
1160 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1161 * and update the nfs4_state.
1162 */
1163static struct nfs4_state *
1164_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1165{
1166 struct inode *inode = data->state->inode;
1167 struct nfs4_state *state = data->state;
1168 int ret;
1169
1170 if (!data->rpc_done) {
1171 ret = data->rpc_status;
1172 goto err;
1173 }
1174
1175 ret = -ESTALE;
1176 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1177 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1178 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1179 goto err;
1180
1181 ret = -ENOMEM;
1182 state = nfs4_get_open_state(inode, data->owner);
1183 if (state == NULL)
1184 goto err;
1185
1186 ret = nfs_refresh_inode(inode, &data->f_attr);
1187 if (ret)
1188 goto err;
1189
1190 if (data->o_res.delegation_type != 0)
1191 nfs4_opendata_check_deleg(data, state);
1192 update_open_stateid(state, &data->o_res.stateid, NULL,
1193 data->o_arg.fmode);
1194
1195 return state;
1196err:
1197 return ERR_PTR(ret);
1198
1199}
1200
1201static struct nfs4_state *
1202_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1203{
1204 struct inode *inode;
1205 struct nfs4_state *state = NULL;
1b370bc2 1206 int ret;
24ac23ab 1207
aac00a8d 1208 if (!data->rpc_done) {
6ee41268 1209 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1210 goto out;
1211 }
1212
1b370bc2 1213 ret = -EAGAIN;
24ac23ab 1214 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1215 goto err;
24ac23ab 1216 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1217 ret = PTR_ERR(inode);
03f28e3a 1218 if (IS_ERR(inode))
1b370bc2
TM		 1219 goto err;
1220 ret = -ENOMEM;
24ac23ab
TM		 1221 state = nfs4_get_open_state(inode, data->owner);
1222 if (state == NULL)
1b370bc2 1223 goto err_put_inode;
e23008ec
AA		 1224 if (data->o_res.delegation_type != 0)
1225 nfs4_opendata_check_deleg(data, state);
34310430 1226 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1227 data->o_arg.fmode);
24ac23ab 1228 iput(inode);
aac00a8d 1229out:
24ac23ab 1230 return state;
1b370bc2
TM		 1231err_put_inode:
1232 iput(inode);
1233err:
1234 return ERR_PTR(ret);
24ac23ab
TM		 1235}
1236
e23008ec
AA		 1237static struct nfs4_state *
1238nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1239{
1240 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1241 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1242 return _nfs4_opendata_to_nfs4_state(data);
1243}
1244
864472e9
TM		 1245static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1246{
1247 struct nfs_inode *nfsi = NFS_I(state->inode);
1248 struct nfs_open_context *ctx;
1249
1250 spin_lock(&state->inode->i_lock);
1251 list_for_each_entry(ctx, &nfsi->open_files, list) {
1252 if (ctx->state != state)
1253 continue;
1254 get_nfs_open_context(ctx);
1255 spin_unlock(&state->inode->i_lock);
1256 return ctx;
1257 }
1258 spin_unlock(&state->inode->i_lock);
1259 return ERR_PTR(-ENOENT);
1260}
1261
6f220ed5
TM		 1262static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1263{
1264 struct nfs4_opendata *opendata;
1265
3d4ff43d 1266 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1267 if (opendata == NULL)
1268 return ERR_PTR(-ENOMEM);
1269 opendata->state = state;
1270 atomic_inc(&state->count);
1271 return opendata;
1272}
1273
dc0b027d 1274static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1275{
2ced46c2 1276 struct nfs4_state *newstate;
864472e9
TM		 1277 int ret;
1278
dc0b027d
TM		 1279 opendata->o_arg.open_flags = 0;
1280 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1281 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1282 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1283 nfs4_init_opendata_res(opendata);
b257957e 1284 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1285 if (ret != 0)
1286 return ret;
2ced46c2 1287 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1288 if (IS_ERR(newstate))
1289 return PTR_ERR(newstate);
643168c2 1290 nfs4_close_state(newstate, fmode);
2ced46c2 1291 *res = newstate;
864472e9
TM		 1292 return 0;
1293}
1294
1295static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1296{
864472e9 1297 struct nfs4_state *newstate;
864472e9
TM		 1298 int ret;
1299
1300 /* memory barrier prior to reading state->n_* */
2ced46c2 1301 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1302 smp_rmb();
1303 if (state->n_rdwr != 0) {
b0ed9dbc 1304 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1305 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1306 if (ret != 0)
1307 return ret;
2ced46c2
TM		 1308 if (newstate != state)
1309 return -ESTALE;
864472e9
TM		 1310 }
1311 if (state->n_wronly != 0) {
b0ed9dbc 1312 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1313 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1314 if (ret != 0)
1315 return ret;
2ced46c2
TM		 1316 if (newstate != state)
1317 return -ESTALE;
864472e9
TM		 1318 }
1319 if (state->n_rdonly != 0) {
b0ed9dbc 1320 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1321 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1322 if (ret != 0)
1323 return ret;
2ced46c2
TM		 1324 if (newstate != state)
1325 return -ESTALE;
864472e9 1326 }
1ac7e2fd
TM		 1327 /*
1328 * We may have performed cached opens for all three recoveries.
1329 * Check if we need to update the current stateid.
1330 */
1331 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1332 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1333 write_seqlock(&state->seqlock);
1ac7e2fd 1334 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1335 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1336 write_sequnlock(&state->seqlock);
1ac7e2fd 1337 }
864472e9
TM		 1338 return 0;
1339}
1340
1da177e4
LT		 1341/*
1342 * OPEN_RECLAIM:
1343 * reclaim state on the server after a reboot.
1da177e4 1344 */
539cd03a 1345static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1346{
1ac7e2fd 1347 struct nfs_delegation *delegation;
864472e9 1348 struct nfs4_opendata *opendata;
dc0b027d 1349 fmode_t delegation_type = 0;
1da177e4
LT		 1350 int status;
1351
6f220ed5
TM		 1352 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1353 if (IS_ERR(opendata))
1354 return PTR_ERR(opendata);
864472e9
TM		 1355 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1356 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1357 rcu_read_lock();
1358 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1359 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1360 delegation_type = delegation->type;
1ac7e2fd 1361 rcu_read_unlock();
864472e9
TM		 1362 opendata->o_arg.u.delegation_type = delegation_type;
1363 status = nfs4_open_recover(opendata, state);
c6d00e63 1364 nfs4_opendata_put(opendata);
1da177e4
LT		 1365 return status;
1366}
1367
539cd03a 1368static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1369{
1370 struct nfs_server *server = NFS_SERVER(state->inode);
1371 struct nfs4_exception exception = { };
1372 int err;
1373 do {
539cd03a 1374 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1375 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1376 break;
1377 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1378 } while (exception.retry);
1379 return err;
1380}
1381
864472e9
TM		 1382static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1383{
1384 struct nfs_open_context *ctx;
1385 int ret;
1386
1387 ctx = nfs4_state_find_open_context(state);
1388 if (IS_ERR(ctx))
1389 return PTR_ERR(ctx);
539cd03a 1390 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1391 put_nfs_open_context(ctx);
1392 return ret;
1393}
1394
13437e12 1395static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1396{
e56e0b78 1397 struct nfs4_opendata *opendata;
864472e9 1398 int ret;
1da177e4 1399
6f220ed5
TM		 1400 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1401 if (IS_ERR(opendata))
1402 return PTR_ERR(opendata);
e56e0b78 1403 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1404 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1405 ret = nfs4_open_recover(opendata, state);
c6d00e63 1406 nfs4_opendata_put(opendata);
864472e9 1407 return ret;
1da177e4
LT		 1408}
1409
13437e12 1410int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1411{
1412 struct nfs4_exception exception = { };
539cd03a 1413 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1414 int err;
1415 do {
13437e12 1416 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1417 switch (err) {
1418 case 0:
965b5d67
TM		 1419 case -ENOENT:
1420 case -ESTALE:
1421 goto out;
bcfa49f6
RL		 1422 case -NFS4ERR_BADSESSION:
1423 case -NFS4ERR_BADSLOT:
1424 case -NFS4ERR_BAD_HIGH_SLOT:
1425 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1426 case -NFS4ERR_DEADSESSION:
9f594791 1427 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1428 goto out;
1da177e4
LT		 1429 case -NFS4ERR_STALE_CLIENTID:
1430 case -NFS4ERR_STALE_STATEID:
1431 case -NFS4ERR_EXPIRED:
1432 /* Don't recall a delegation if it was lost */
0400a6b0 1433 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1434 goto out;
1435 case -ERESTARTSYS:
1436 /*
1437 * The show must go on: exit, but mark the
1438 * stateid as needing recovery.
1439 */
a1d0b5ee 1440 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1441 case -NFS4ERR_ADMIN_REVOKED:
1442 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1443 nfs_inode_find_state_and_recover(state->inode,
1444 stateid);
0400a6b0 1445 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1446 case -EKEYEXPIRED:
1447 /*
1448 * User RPCSEC_GSS context has expired.
1449 * We cannot recover this stateid now, so
1450 * skip it and allow recovery thread to
1451 * proceed.
1452 */
965b5d67
TM		 1453 case -ENOMEM:
1454 err = 0;
1455 goto out;
1da177e4
LT		 1456 }
1457 err = nfs4_handle_exception(server, err, &exception);
1458 } while (exception.retry);
965b5d67 1459out:
1da177e4
LT		 1460 return err;
1461}
1462
cdd4e68b
TM		 1463static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1464{
1465 struct nfs4_opendata *data = calldata;
1466
1467 data->rpc_status = task->tk_status;
26e976a8 1468 if (data->rpc_status == 0) {
f597c537 1469 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1470 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1471 renew_lease(data->o_res.server, data->timestamp);
3e309914 1472 data->rpc_done = 1;
26e976a8 1473 }
cdd4e68b
TM		 1474}
1475
1476static void nfs4_open_confirm_release(void *calldata)
1477{
1478 struct nfs4_opendata *data = calldata;
1479 struct nfs4_state *state = NULL;
1480
1481 /* If this request hasn't been cancelled, do nothing */
1482 if (data->cancelled == 0)
1483 goto out_free;
1484 /* In case of error, no cleanup! */
3e309914 1485 if (!data->rpc_done)
cdd4e68b 1486 goto out_free;
cdd4e68b 1487 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1488 if (!IS_ERR(state))
643168c2 1489 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1490out_free:
c6d00e63 1491 nfs4_opendata_put(data);
cdd4e68b
TM		 1492}
1493
1494static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1495 .rpc_call_done = nfs4_open_confirm_done,
1496 .rpc_release = nfs4_open_confirm_release,
1497};
1498
1499/*
1500 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1501 */
1502static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1503{
1504 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1505 struct rpc_task *task;
5138fde0
TM		 1506 struct rpc_message msg = {
1507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1508 .rpc_argp = &data->c_arg,
1509 .rpc_resp = &data->c_res,
1510 .rpc_cred = data->owner->so_cred,
1511 };
c970aa85
TM		 1512 struct rpc_task_setup task_setup_data = {
1513 .rpc_client = server->client,
5138fde0 1514 .rpc_message = &msg,
c970aa85
TM		 1515 .callback_ops = &nfs4_open_confirm_ops,
1516 .callback_data = data,
101070ca 1517 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1518 .flags = RPC_TASK_ASYNC,
1519 };
1da177e4
LT		 1520 int status;
1521
c6d00e63 1522 kref_get(&data->kref);
3e309914
TM		 1523 data->rpc_done = 0;
1524 data->rpc_status = 0;
5138fde0 1525 data->timestamp = jiffies;
c970aa85 1526 task = rpc_run_task(&task_setup_data);
7a1218a2 1527 if (IS_ERR(task))
cdd4e68b 1528 return PTR_ERR(task);
cdd4e68b
TM		 1529 status = nfs4_wait_for_completion_rpc_task(task);
1530 if (status != 0) {
1531 data->cancelled = 1;
1532 smp_wmb();
1533 } else
1534 status = data->rpc_status;
e6b3c4db 1535 rpc_put_task(task);
1da177e4
LT		 1536 return status;
1537}
1538
24ac23ab 1539static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1540{
24ac23ab
TM		 1541 struct nfs4_opendata *data = calldata;
1542 struct nfs4_state_owner *sp = data->owner;
5138fde0 1543
24ac23ab
TM		 1544 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1545 return;
aac00a8d
TM		 1546 /*
1547 * Check if we still need to send an OPEN call, or if we can use
1548 * a delegation instead.
1549 */
1550 if (data->state != NULL) {
1551 struct nfs_delegation *delegation;
1552
dc0b027d 1553 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1554 goto out_no_action;
aac00a8d
TM		 1555 rcu_read_lock();
1556 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1557 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1558 can_open_delegated(delegation, data->o_arg.fmode))
1559 goto unlock_no_action;
aac00a8d
TM		 1560 rcu_read_unlock();
1561 }
95b72eb0 1562 /* Update client id. */
1f0e890d 1563 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1564 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1565 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1566 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1567 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1568 }
26e976a8 1569 data->timestamp = jiffies;
035168ab 1570 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1571 &data->o_arg.seq_args,
2240a9e2
TM		 1572 &data->o_res.seq_res,
1573 task) != 0)
1574 nfs_release_seqid(data->o_arg.seqid);
1575 else
1576 rpc_call_start(task);
6ee41268 1577 return;
652f89f6
TM		 1578unlock_no_action:
1579 rcu_read_unlock();
6ee41268
TM		 1580out_no_action:
1581 task->tk_action = NULL;
1582
24ac23ab 1583}
1da177e4 1584
b257957e
AB		 1585static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1586{
1587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1588 nfs4_open_prepare(task, calldata);
1589}
1590
24ac23ab
TM		 1591static void nfs4_open_done(struct rpc_task *task, void *calldata)
1592{
1593 struct nfs4_opendata *data = calldata;
1da177e4 1594
24ac23ab 1595 data->rpc_status = task->tk_status;
d898528c 1596
14516c3a
TM		 1597 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1598 return;
d898528c 1599
24ac23ab 1600 if (task->tk_status == 0) {
807d66d8
TM		 1601 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1602 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1603 case S_IFREG:
1604 break;
1605 case S_IFLNK:
24ac23ab 1606 data->rpc_status = -ELOOP;
6f926b5b
TM		 1607 break;
1608 case S_IFDIR:
24ac23ab 1609 data->rpc_status = -EISDIR;
6f926b5b
TM		 1610 break;
1611 default:
24ac23ab 1612 data->rpc_status = -ENOTDIR;
807d66d8 1613 }
6f926b5b 1614 }
26e976a8 1615 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1616 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1617 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1618 }
3e309914 1619 data->rpc_done = 1;
24ac23ab 1620}
6f926b5b 1621
24ac23ab
TM		 1622static void nfs4_open_release(void *calldata)
1623{
1624 struct nfs4_opendata *data = calldata;
1625 struct nfs4_state *state = NULL;
1626
1627 /* If this request hasn't been cancelled, do nothing */
1628 if (data->cancelled == 0)
1629 goto out_free;
1630 /* In case of error, no cleanup! */
3e309914 1631 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1632 goto out_free;
1633 /* In case we need an open_confirm, no cleanup! */
1634 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1635 goto out_free;
24ac23ab 1636 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1637 if (!IS_ERR(state))
643168c2 1638 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1639out_free:
c6d00e63 1640 nfs4_opendata_put(data);
24ac23ab
TM		 1641}
1642
1643static const struct rpc_call_ops nfs4_open_ops = {
1644 .rpc_call_prepare = nfs4_open_prepare,
1645 .rpc_call_done = nfs4_open_done,
1646 .rpc_release = nfs4_open_release,
1647};
1648
b257957e
AB		 1649static const struct rpc_call_ops nfs4_recover_open_ops = {
1650 .rpc_call_prepare = nfs4_recover_open_prepare,
1651 .rpc_call_done = nfs4_open_done,
1652 .rpc_release = nfs4_open_release,
1653};
1654
1655static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1656{
1657 struct inode *dir = data->dir->d_inode;
1658 struct nfs_server *server = NFS_SERVER(dir);
1659 struct nfs_openargs *o_arg = &data->o_arg;
1660 struct nfs_openres *o_res = &data->o_res;
1661 struct rpc_task *task;
5138fde0
TM		 1662 struct rpc_message msg = {
1663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1664 .rpc_argp = o_arg,
1665 .rpc_resp = o_res,
1666 .rpc_cred = data->owner->so_cred,
1667 };
c970aa85
TM		 1668 struct rpc_task_setup task_setup_data = {
1669 .rpc_client = server->client,
5138fde0 1670 .rpc_message = &msg,
c970aa85
TM		 1671 .callback_ops = &nfs4_open_ops,
1672 .callback_data = data,
101070ca 1673 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1674 .flags = RPC_TASK_ASYNC,
1675 };
24ac23ab
TM		 1676 int status;
1677
9d12b216 1678 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1679 kref_get(&data->kref);
3e309914
TM		 1680 data->rpc_done = 0;
1681 data->rpc_status = 0;
2ced46c2 1682 data->cancelled = 0;
b257957e
AB		 1683 if (isrecover)
1684 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1685 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1686 if (IS_ERR(task))
1687 return PTR_ERR(task);
1688 status = nfs4_wait_for_completion_rpc_task(task);
1689 if (status != 0) {
1690 data->cancelled = 1;
1691 smp_wmb();
1692 } else
1693 status = data->rpc_status;
1694 rpc_put_task(task);
1695
1696 return status;
1697}
1698
1699static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1700{
1701 struct inode *dir = data->dir->d_inode;
1702 struct nfs_openres *o_res = &data->o_res;
1703 int status;
1704
1705 status = nfs4_run_open_task(data, 1);
1706 if (status != 0 || !data->rpc_done)
1707 return status;
1708
6926afd1
TM		 1709 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1710
b257957e
AB		 1711 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1712 status = _nfs4_proc_open_confirm(data);
1713 if (status != 0)
1714 return status;
1715 }
1716
1717 return status;
1718}
1719
6168f62c
WAA		 1720static int nfs4_opendata_access(struct rpc_cred *cred,
1721 struct nfs4_opendata *opendata,
1722 struct nfs4_state *state, fmode_t fmode)
1723{
1724 struct nfs_access_entry cache;
1725 u32 mask;
1726
1727 /* access call failed or for some reason the server doesn't
1728 * support any access modes -- defer access call until later */
1729 if (opendata->o_res.access_supported == 0)
1730 return 0;
1731
1732 mask = 0;
bbd3a8ee
WAA		 1733 /* don't check MAY_WRITE - a newly created file may not have
1734 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1735 if (fmode & FMODE_READ)
1736 mask |= MAY_READ;
6168f62c
WAA		 1737 if (fmode & FMODE_EXEC)
1738 mask |= MAY_EXEC;
1739
1740 cache.cred = cred;
1741 cache.jiffies = jiffies;
1742 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1743 nfs_access_add_cache(state->inode, &cache);
1744
bbd3a8ee 1745 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1746 return 0;
1747
1748 /* even though OPEN succeeded, access is denied. Close the file */
1749 nfs4_close_state(state, fmode);
998f40b5 1750 return -EACCES;
6168f62c
WAA		 1751}
1752
b257957e
AB		 1753/*
1754 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1755 */
1756static int _nfs4_proc_open(struct nfs4_opendata *data)
1757{
1758 struct inode *dir = data->dir->d_inode;
1759 struct nfs_server *server = NFS_SERVER(dir);
1760 struct nfs_openargs *o_arg = &data->o_arg;
1761 struct nfs_openres *o_res = &data->o_res;
1762 int status;
1763
1764 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1765 if (!data->rpc_done)
1766 return status;
1767 if (status != 0) {
1768 if (status == -NFS4ERR_BADNAME &&
1769 !(o_arg->open_flags & O_CREAT))
1770 return -ENOENT;
24ac23ab 1771 return status;
08ef7bd3 1772 }
24ac23ab 1773
6926afd1
TM		 1774 nfs_fattr_map_and_free_names(server, &data->f_attr);
1775
90ff0c54 1776 if (o_arg->open_flags & O_CREAT)
56ae19f3 1777 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1778 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1779 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1780 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1781 status = _nfs4_proc_open_confirm(data);
1da177e4 1782 if (status != 0)
24ac23ab 1783 return status;
1da177e4
LT		 1784 }
1785 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1786 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1787 return 0;
1da177e4
LT		 1788}
1789
d83217c1 1790static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1791{
a78cb57a 1792 unsigned int loop;
6b30954e 1793 int ret;
58d9714a 1794
a78cb57a 1795 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1796 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1797 if (ret != 0)
a78cb57a 1798 break;
e598d843
TM		 1799 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1800 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1801 break;
0400a6b0 1802 nfs4_schedule_state_manager(clp);
a78cb57a 1803 ret = -EIO;
6b30954e 1804 }
a78cb57a 1805 return ret;
58d9714a
TM		 1806}
1807
d83217c1
AA		 1808static int nfs4_recover_expired_lease(struct nfs_server *server)
1809{
1810 return nfs4_client_recover_expired_lease(server->nfs_client);
1811}
1812
1da177e4
LT		 1813/*
1814 * OPEN_EXPIRED:
1815 * reclaim state on the server after a network partition.
1816 * Assumes caller holds the appropriate lock
1817 */
539cd03a 1818static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1819{
e56e0b78 1820 struct nfs4_opendata *opendata;
864472e9 1821 int ret;
1da177e4 1822
6f220ed5
TM		 1823 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1824 if (IS_ERR(opendata))
1825 return PTR_ERR(opendata);
864472e9 1826 ret = nfs4_open_recover(opendata, state);
35d05778 1827 if (ret == -ESTALE)
3d4ff43d 1828 d_drop(ctx->dentry);
c6d00e63 1829 nfs4_opendata_put(opendata);
864472e9 1830 return ret;
1da177e4
LT		 1831}
1832
a9ed2e25 1833static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1834{
539cd03a 1835 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1836 struct nfs4_exception exception = { };
1837 int err;
1838
1839 do {
539cd03a 1840 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1841 switch (err) {
1842 default:
1843 goto out;
1844 case -NFS4ERR_GRACE:
1845 case -NFS4ERR_DELAY:
1846 nfs4_handle_exception(server, err, &exception);
1847 err = 0;
1848 }
202b50dc 1849 } while (exception.retry);
a9ed2e25 1850out:
202b50dc
TM		 1851 return err;
1852}
1853
1da177e4
LT		 1854static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1855{
1da177e4 1856 struct nfs_open_context *ctx;
864472e9 1857 int ret;
1da177e4 1858
864472e9
TM		 1859 ctx = nfs4_state_find_open_context(state);
1860 if (IS_ERR(ctx))
1861 return PTR_ERR(ctx);
539cd03a 1862 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1863 put_nfs_open_context(ctx);
1864 return ret;
1da177e4
LT		 1865}
1866
f062eb6c 1867#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1868static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1869{
f062eb6c 1870 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1871 nfs4_stateid *stateid = &state->stateid;
1872 int status;
1873
1874 /* If a state reset has been done, test_stateid is unneeded */
1875 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1876 return;
1877
1878 status = nfs41_test_stateid(server, stateid);
1879 if (status != NFS_OK) {
1880 /* Free the stateid unless the server explicitly
1881 * informs us the stateid is unrecognized. */
1882 if (status != -NFS4ERR_BAD_STATEID)
1883 nfs41_free_stateid(server, stateid);
6938867e 1884 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1885
6938867e
BS		 1886 write_seqlock(&state->seqlock);
1887 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1888 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1889 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1890 }
1891}
1892
1893/**
1894 * nfs41_check_open_stateid - possibly free an open stateid
1895 *
1896 * @state: NFSv4 state for an inode
1897 *
1898 * Returns NFS_OK if recovery for this stateid is now finished.
1899 * Otherwise a negative NFS4ERR value is returned.
1900 */
1901static int nfs41_check_open_stateid(struct nfs4_state *state)
1902{
1903 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1904 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1905 int status;
1906
1907 /* If a state reset has been done, test_stateid is unneeded */
1908 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1909 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1910 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1911 return -NFS4ERR_BAD_STATEID;
1912
1913 status = nfs41_test_stateid(server, stateid);
1914 if (status != NFS_OK) {
1915 /* Free the stateid unless the server explicitly
1916 * informs us the stateid is unrecognized. */
1917 if (status != -NFS4ERR_BAD_STATEID)
1918 nfs41_free_stateid(server, stateid);
1919
1920 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1921 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1922 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1923 }
1924 return status;
1925}
1926
1927static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1928{
eb64cf96 1929 int status;
b01dd1d8 1930
3e60ffdd
CL		 1931 nfs41_clear_delegation_stateid(state);
1932 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1933 if (status != NFS_OK)
1934 status = nfs4_open_expired(sp, state);
1935 return status;
f062eb6c
BS		 1936}
1937#endif
1938
aa53ed54
JL		 1939/*
1940 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1941 * fields corresponding to attributes that were used to store the verifier.
1942 * Make sure we clobber those fields in the later setattr call
1943 */
1944static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1945{
1946 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1947 !(sattr->ia_valid & ATTR_ATIME_SET))
1948 sattr->ia_valid |= ATTR_ATIME;
1949
1950 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1951 !(sattr->ia_valid & ATTR_MTIME_SET))
1952 sattr->ia_valid |= ATTR_MTIME;
1953}
1954
1da177e4 1955/*
24ac23ab 1956 * Returns a referenced nfs4_state
1da177e4 1957 */
82be417a
AA		 1958static int _nfs4_do_open(struct inode *dir,
1959 struct dentry *dentry,
1960 fmode_t fmode,
1961 int flags,
1962 struct iattr *sattr,
1963 struct rpc_cred *cred,
1964 struct nfs4_state **res,
1965 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1966{
1967 struct nfs4_state_owner *sp;
1968 struct nfs4_state *state = NULL;
1969 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1970 struct nfs4_opendata *opendata;
aac00a8d 1971 int status;
1da177e4
LT		 1972
1973 /* Protect against reboot recovery conflicts */
1da177e4 1974 status = -ENOMEM;
d1e284d5
TM		 1975 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1976 if (sp == NULL) {
1da177e4
LT		 1977 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1978 goto out_err;
1979 }
58d9714a
TM		 1980 status = nfs4_recover_expired_lease(server);
1981 if (status != 0)
b4454fe1 1982 goto err_put_state_owner;
82a2c1b7
AV		 1983 if (dentry->d_inode != NULL)
1984 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1985 status = -ENOMEM;
82a2c1b7 1986 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1987 if (opendata == NULL)
95d35cb4 1988 goto err_put_state_owner;
1da177e4 1989
82be417a
AA		 1990 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1991 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1992 if (!opendata->f_attr.mdsthreshold)
1993 goto err_opendata_put;
1549210f 1994 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1995 }
82a2c1b7
AV		 1996 if (dentry->d_inode != NULL)
1997 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1998
24ac23ab 1999 status = _nfs4_proc_open(opendata);
1da177e4 2000 if (status != 0)
c6d00e63 2001 goto err_opendata_put;
1da177e4 2002
24ac23ab 2003 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2004 status = PTR_ERR(state);
2005 if (IS_ERR(state))
c6d00e63 2006 goto err_opendata_put;
0df5dd4a 2007 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 2008 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 2009
6168f62c
WAA		 2010 status = nfs4_opendata_access(cred, opendata, state, fmode);
2011 if (status != 0)
2012 goto err_opendata_put;
2013
0ab64e0e
TM		 2014 if (opendata->o_arg.open_flags & O_EXCL) {
2015 nfs4_exclusive_attrset(opendata, sattr);
2016
2017 nfs_fattr_init(opendata->o_res.f_attr);
2018 status = nfs4_do_setattr(state->inode, cred,
2019 opendata->o_res.f_attr, sattr,
2020 state);
2021 if (status == 0)
2022 nfs_setattr_update_inode(state->inode, sattr);
2023 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2024 }
82be417a
AA		 2025
2026 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2027 *ctx_th = opendata->f_attr.mdsthreshold;
2028 else
2029 kfree(opendata->f_attr.mdsthreshold);
2030 opendata->f_attr.mdsthreshold = NULL;
2031
c6d00e63 2032 nfs4_opendata_put(opendata);
1da177e4 2033 nfs4_put_state_owner(sp);
1da177e4
LT		 2034 *res = state;
2035 return 0;
c6d00e63 2036err_opendata_put:
82be417a 2037 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2038 nfs4_opendata_put(opendata);
e56e0b78
TM		 2039err_put_state_owner:
2040 nfs4_put_state_owner(sp);
1da177e4 2041out_err:
1da177e4
LT		 2042 *res = NULL;
2043 return status;
2044}
2045
2046
82be417a
AA		 2047static struct nfs4_state *nfs4_do_open(struct inode *dir,
2048 struct dentry *dentry,
2049 fmode_t fmode,
2050 int flags,
2051 struct iattr *sattr,
2052 struct rpc_cred *cred,
2053 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2054{
2055 struct nfs4_exception exception = { };
2056 struct nfs4_state *res;
2057 int status;
2058
6168f62c 2059 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2060 do {
82be417a
AA		 2061 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2062 &res, ctx_th);
1da177e4
LT		 2063 if (status == 0)
2064 break;
2065 /* NOTE: BAD_SEQID means the server and client disagree about the
2066 * book-keeping w.r.t. state-changing operations
2067 * (OPEN/CLOSE/LOCK/LOCKU...)
2068 * It is actually a sign of a bug on the client or on the server.
2069 *
2070 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2071 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2072 * have unhashed the old state_owner for us, and that we can
2073 * therefore safely retry using a new one. We should still warn
2074 * the user though...
2075 */
2076 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2077 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2078 " returned a bad sequence-id error!\n",
2079 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2080 exception.retry = 1;
2081 continue;
2082 }
550f5747
TM		 2083 /*
2084 * BAD_STATEID on OPEN means that the server cancelled our
2085 * state before it received the OPEN_CONFIRM.
2086 * Recover by retrying the request as per the discussion
2087 * on Page 181 of RFC3530.
2088 */
2089 if (status == -NFS4ERR_BAD_STATEID) {
2090 exception.retry = 1;
2091 continue;
2092 }
aac00a8d
TM		 2093 if (status == -EAGAIN) {
2094 /* We must have found a delegation */
2095 exception.retry = 1;
2096 continue;
2097 }
1da177e4
LT		 2098 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2099 status, &exception));
2100 } while (exception.retry);
2101 return res;
2102}
2103
659bfcd6
TM		 2104static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2105 struct nfs_fattr *fattr, struct iattr *sattr,
2106 struct nfs4_state *state)
1da177e4 2107{
3e4f6290 2108 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2109 struct nfs_setattrargs arg = {
3e4f6290 2110 .fh = NFS_FH(inode),
1da177e4
LT		 2111 .iap = sattr,
2112 .server = server,
2113 .bitmask = server->attr_bitmask,
2114 };
2115 struct nfs_setattrres res = {
2116 .fattr = fattr,
2117 .server = server,
2118 };
2119 struct rpc_message msg = {
659bfcd6
TM		 2120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2121 .rpc_argp = &arg,
2122 .rpc_resp = &res,
2123 .rpc_cred = cred,
1da177e4 2124 };
26e976a8 2125 unsigned long timestamp = jiffies;
65e4308d 2126 int status;
1da177e4 2127
0e574af1 2128 nfs_fattr_init(fattr);
1da177e4 2129
4fc8796d 2130 if (state != NULL) {
2a369153
TM		 2131 struct nfs_lockowner lockowner = {
2132 .l_owner = current->files,
2133 .l_pid = current->tgid,
2134 };
4fc8796d 2135 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2136 &lockowner);
4fc8796d
TM		 2137 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2138 FMODE_WRITE)) {
3e4f6290 2139 /* Use that stateid */
08e9eac4 2140 } else
f597c537 2141 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2142
7c513058 2143 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2144 if (status == 0 && state != NULL)
2145 renew_lease(server, timestamp);
65e4308d 2146 return status;
1da177e4
LT		 2147}
2148
659bfcd6
TM		 2149static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2150 struct nfs_fattr *fattr, struct iattr *sattr,
2151 struct nfs4_state *state)
1da177e4 2152{
3e4f6290 2153 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2154 struct nfs4_exception exception = {
2155 .state = state,
3114ea7a 2156 .inode = inode,
a1d0b5ee 2157 };
1da177e4
LT		 2158 int err;
2159 do {
451146be
TM		 2160 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2161 switch (err) {
2162 case -NFS4ERR_OPENMODE:
2163 if (state && !(state->state & FMODE_WRITE)) {
2164 err = -EBADF;
2165 if (sattr->ia_valid & ATTR_OPEN)
2166 err = -EACCES;
2167 goto out;
2168 }
2169 }
2170 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2171 } while (exception.retry);
451146be 2172out:
1da177e4
LT		 2173 return err;
2174}
2175
2176struct nfs4_closedata {
2177 struct inode *inode;
2178 struct nfs4_state *state;
2179 struct nfs_closeargs arg;
2180 struct nfs_closeres res;
516a6af6 2181 struct nfs_fattr fattr;
26e976a8 2182 unsigned long timestamp;
f7e8917a
FI		 2183 bool roc;
2184 u32 roc_barrier;
1da177e4
LT		 2185};
2186
963d8fe5 2187static void nfs4_free_closedata(void *data)
9512135d 2188{
963d8fe5
TM		 2189 struct nfs4_closedata *calldata = data;
2190 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2191 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2192
f7e8917a
FI		 2193 if (calldata->roc)
2194 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2195 nfs4_put_open_state(calldata->state);
2196 nfs_free_seqid(calldata->arg.seqid);
9512135d 2197 nfs4_put_state_owner(sp);
324d003b 2198 nfs_sb_deactive_async(sb);
9512135d
TM		 2199 kfree(calldata);
2200}
2201
88069f77
TM		 2202static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2203 fmode_t fmode)
2204{
2205 spin_lock(&state->owner->so_lock);
2206 if (!(fmode & FMODE_READ))
2207 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2208 if (!(fmode & FMODE_WRITE))
2209 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2210 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2211 spin_unlock(&state->owner->so_lock);
2212}
2213
963d8fe5 2214static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2215{
963d8fe5 2216 struct nfs4_closedata *calldata = data;
1da177e4 2217 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2218 struct nfs_server *server = NFS_SERVER(calldata->inode);
2219
a3ca5651 2220 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2221 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2222 return;
1da177e4
LT		 2223 /* hmm. we are done with the inode, and in the process of freeing
2224 * the state_owner. we keep this around to process errors
2225 */
1da177e4
LT		 2226 switch (task->tk_status) {
2227 case 0:
f7e8917a
FI		 2228 if (calldata->roc)
2229 pnfs_roc_set_barrier(state->inode,
2230 calldata->roc_barrier);
45328c35 2231 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2232 renew_lease(server, calldata->timestamp);
88069f77
TM		 2233 nfs4_close_clear_stateid_flags(state,
2234 calldata->arg.fmode);
1da177e4
LT		 2235 break;
2236 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2237 case -NFS4ERR_OLD_STATEID:
2238 case -NFS4ERR_BAD_STATEID:
1da177e4 2239 case -NFS4ERR_EXPIRED:
dc0b027d 2240 if (calldata->arg.fmode == 0)
9e33bed5 2241 break;
1da177e4 2242 default:
72211dbe
TM		 2243 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2244 rpc_restart_call_prepare(task);
1da177e4 2245 }
72211dbe 2246 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2247 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2248 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2249}
2250
4ce70ada 2251static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2252{
4ce70ada 2253 struct nfs4_closedata *calldata = data;
9512135d 2254 struct nfs4_state *state = calldata->state;
7fdab069 2255 struct inode *inode = calldata->inode;
88069f77 2256 int call_close = 0;
9512135d 2257
a3ca5651 2258 dprintk("%s: begin!\n", __func__);
963d8fe5 2259 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2260 return;
003707c7 2261
88069f77
TM		 2262 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2263 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2264 spin_lock(&state->owner->so_lock);
003707c7 2265 /* Calculate the change in open mode */
e7616923 2266 if (state->n_rdwr == 0) {
003707c7 2267 if (state->n_rdonly == 0) {
88069f77
TM		 2268 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2269 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2270 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2271 }
2272 if (state->n_wronly == 0) {
88069f77
TM		 2273 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2274 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2275 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2276 }
e7616923 2277 }
4cecb76f 2278 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2279
2280 if (!call_close) {
963d8fe5
TM		 2281 /* Note: exit _without_ calling nfs4_close_done */
2282 task->tk_action = NULL;
a3ca5651 2283 goto out;
9512135d 2284 }
88069f77 2285
f7e8917a 2286 if (calldata->arg.fmode == 0) {
88069f77 2287 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2288 if (calldata->roc &&
7fdab069 2289 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2290 goto out;
f7e8917a 2291 }
88069f77 2292
516a6af6 2293 nfs_fattr_init(calldata->res.fattr);
26e976a8 2294 calldata->timestamp = jiffies;
7fdab069 2295 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2296 &calldata->arg.seq_args,
2297 &calldata->res.seq_res,
2240a9e2
TM		 2298 task) != 0)
2299 nfs_release_seqid(calldata->arg.seqid);
2300 else
2301 rpc_call_start(task);
a3ca5651
CL		 2302out:
2303 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2304}
2305
963d8fe5 2306static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2307 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2308 .rpc_call_done = nfs4_close_done,
2309 .rpc_release = nfs4_free_closedata,
2310};
2311
1da177e4
LT		 2312/*
2313 * It is possible for data to be read/written from a mem-mapped file
2314 * after the sys_close call (which hits the vfs layer as a flush).
2315 * This means that we can't safely call nfsv4 close on a file until
2316 * the inode is cleared. This in turn means that we are not good
2317 * NFSv4 citizens - we do not indicate to the server to update the file's
2318 * share state even when we are done with one of the three share
2319 * stateid's in the inode.
2320 *
2321 * NOTE: Caller must be holding the sp->so_owner semaphore!
2322 */
1f7977c1 2323int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2324{
4a35bd41 2325 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2326 struct nfs4_closedata *calldata;
b39e625b
TM		 2327 struct nfs4_state_owner *sp = state->owner;
2328 struct rpc_task *task;
5138fde0
TM		 2329 struct rpc_message msg = {
2330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2331 .rpc_cred = state->owner->so_cred,
2332 };
c970aa85
TM		 2333 struct rpc_task_setup task_setup_data = {
2334 .rpc_client = server->client,
5138fde0 2335 .rpc_message = &msg,
c970aa85 2336 .callback_ops = &nfs4_close_ops,
101070ca 2337 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2338 .flags = RPC_TASK_ASYNC,
2339 };
9512135d 2340 int status = -ENOMEM;
1da177e4 2341
8535b2be 2342 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2343 if (calldata == NULL)
9512135d 2344 goto out;
9d12b216 2345 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2346 calldata->inode = state->inode;
1da177e4 2347 calldata->state = state;
4a35bd41 2348 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2349 calldata->arg.stateid = &state->open_stateid;
1da177e4 2350 /* Serialization for the sequence id */
8535b2be 2351 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2352 if (calldata->arg.seqid == NULL)
2353 goto out_free_calldata;
dc0b027d 2354 calldata->arg.fmode = 0;
a65318bf 2355 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2356 calldata->res.fattr = &calldata->fattr;
c1d51931 2357 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2358 calldata->res.server = server;
1f7977c1 2359 calldata->roc = pnfs_roc(state->inode);
643168c2 2360 nfs_sb_active(calldata->inode->i_sb);
9512135d 2361
1174dd1f
TM		 2362 msg.rpc_argp = &calldata->arg;
2363 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2364 task_setup_data.callback_data = calldata;
2365 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2366 if (IS_ERR(task))
2367 return PTR_ERR(task);
a49c3c77
TM		 2368 status = 0;
2369 if (wait)
2370 status = rpc_wait_for_completion_task(task);
b39e625b 2371 rpc_put_task(task);
a49c3c77 2372 return status;
9512135d
TM		 2373out_free_calldata:
2374 kfree(calldata);
2375out:
b39e625b
TM		 2376 nfs4_put_open_state(state);
2377 nfs4_put_state_owner(sp);
9512135d 2378 return status;
1da177e4
LT		 2379}
2380
2b484297 2381static struct inode *
cd9a1c0e 2382nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2383{
1da177e4 2384 struct nfs4_state *state;
1da177e4 2385
565277f6 2386 /* Protect against concurrent sillydeletes */
82be417a
AA		 2387 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2388 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2389 if (IS_ERR(state))
2390 return ERR_CAST(state);
cd9a1c0e 2391 ctx->state = state;
f46e0bd3 2392 return igrab(state->inode);
1da177e4
LT		 2393}
2394
1185a552 2395static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2396{
2397 if (ctx->state == NULL)
2398 return;
2399 if (is_sync)
643168c2 2400 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2401 else
643168c2 2402 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2403}
1da177e4
LT		 2404
2405static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2406{
43652ad5
BH		 2407 struct nfs4_server_caps_arg args = {
2408 .fhandle = fhandle,
2409 };
1da177e4
LT		 2410 struct nfs4_server_caps_res res = {};
2411 struct rpc_message msg = {
2412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2413 .rpc_argp = &args,
1da177e4
LT		 2414 .rpc_resp = &res,
2415 };
2416 int status;
2417
7c513058 2418 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2419 if (status == 0) {
2420 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2421 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2422 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2423 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2424 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2425 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2426 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2427 server->caps |= NFS_CAP_ACLS;
2428 if (res.has_links != 0)
2429 server->caps |= NFS_CAP_HARDLINKS;
2430 if (res.has_symlinks != 0)
2431 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2432 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2433 server->caps |= NFS_CAP_FILEID;
2434 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2435 server->caps |= NFS_CAP_MODE;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2437 server->caps |= NFS_CAP_NLINK;
2438 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2439 server->caps |= NFS_CAP_OWNER;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2441 server->caps |= NFS_CAP_OWNER_GROUP;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2443 server->caps |= NFS_CAP_ATIME;
2444 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2445 server->caps |= NFS_CAP_CTIME;
2446 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2447 server->caps |= NFS_CAP_MTIME;
2448
a65318bf
TM		 2449 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2450 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2451 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2452 server->acl_bitmask = res.acl_bitmask;
264e6351 2453 server->fh_expire_type = res.fh_expire_type;
1da177e4 2454 }
cccef3b9 2455
1da177e4
LT		 2456 return status;
2457}
2458
55a97593 2459int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2460{
2461 struct nfs4_exception exception = { };
2462 int err;
2463 do {
2464 err = nfs4_handle_exception(server,
2465 _nfs4_server_capabilities(server, fhandle),
2466 &exception);
2467 } while (exception.retry);
2468 return err;
2469}
2470
2471static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2472 struct nfs_fsinfo *info)
2473{
1da177e4
LT		 2474 struct nfs4_lookup_root_arg args = {
2475 .bitmask = nfs4_fattr_bitmap,
2476 };
2477 struct nfs4_lookup_res res = {
2478 .server = server,
0e574af1 2479 .fattr = info->fattr,
1da177e4
LT		 2480 .fh = fhandle,
2481 };
2482 struct rpc_message msg = {
2483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2484 .rpc_argp = &args,
2485 .rpc_resp = &res,
2486 };
008f55d0 2487
0e574af1 2488 nfs_fattr_init(info->fattr);
7c513058 2489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2490}
2491
2492static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2493 struct nfs_fsinfo *info)
2494{
2495 struct nfs4_exception exception = { };
2496 int err;
2497 do {
fb8a5ba8
BS		 2498 err = _nfs4_lookup_root(server, fhandle, info);
2499 switch (err) {
2500 case 0:
2501 case -NFS4ERR_WRONGSEC:
05e9cfb4 2502 goto out;
fb8a5ba8
BS		 2503 default:
2504 err = nfs4_handle_exception(server, err, &exception);
2505 }
1da177e4 2506 } while (exception.retry);
05e9cfb4 2507out:
1da177e4
LT		 2508 return err;
2509}
2510
8f70e95f
BS		 2511static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2512 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2513{
2514 struct rpc_auth *auth;
2515 int ret;
2516
2517 auth = rpcauth_create(flavor, server->client);
e8d920c5 2518 if (IS_ERR(auth)) {
8f70e95f
BS		 2519 ret = -EIO;
2520 goto out;
2521 }
2522 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2523out:
2524 return ret;
2525}
2526
801a16dc 2527static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2528 struct nfs_fsinfo *info)
1da177e4 2529{
8f70e95f 2530 int i, len, status = 0;
0fabee24 2531 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2532
6a1a1e34 2533 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2534 if (len < 0)
2535 return len;
8f70e95f
BS		 2536
2537 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2538 /* AUTH_UNIX is the default flavor if none was specified,
2539 * thus has already been tried. */
2540 if (flav_array[i] == RPC_AUTH_UNIX)
2541 continue;
2542
8f70e95f 2543 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2544 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2545 continue;
2546 break;
8f70e95f 2547 }
fb8a5ba8
BS		 2548 /*
2549 * -EACCESS could mean that the user doesn't have correct permissions
2550 * to access the mount. It could also mean that we tried to mount
2551 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2552 * existing mount programs don't handle -EACCES very well so it should
2553 * be mapped to -EPERM instead.
2554 */
2555 if (status == -EACCES)
2556 status = -EPERM;
801a16dc
BS		 2557 return status;
2558}
2559
2560/*
2561 * get the file handle for the "/" directory on the server
2562 */
3028eb2b
BS		 2563int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2564 struct nfs_fsinfo *info)
801a16dc 2565{
fca78d6d 2566 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2567 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2568 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2569 /*
2570 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2571 * by nfs4_map_errors() as this function exits.
2572 */
fca78d6d 2573 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2574 if (status == 0)
2575 status = nfs4_server_capabilities(server, fhandle);
2576 if (status == 0)
2577 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2578 return nfs4_map_errors(status);
1da177e4
LT		 2579}
2580
bae36241
BS		 2581static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2582 struct nfs_fsinfo *info)
2583{
2584 int error;
2585 struct nfs_fattr *fattr = info->fattr;
2586
2587 error = nfs4_server_capabilities(server, mntfh);
2588 if (error < 0) {
2589 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2590 return error;
2591 }
2592
2593 error = nfs4_proc_getattr(server, mntfh, fattr);
2594 if (error < 0) {
2595 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2596 return error;
2597 }
2598
2599 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2600 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2601 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2602
2603 return error;
2604}
2605
6b97fd3d
MN		 2606/*
2607 * Get locations and (maybe) other attributes of a referral.
2608 * Note that we'll actually follow the referral later when
2609 * we detect fsid mismatch in inode revalidation
2610 */
f05d147f
BS		 2611static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2612 const struct qstr *name, struct nfs_fattr *fattr,
2613 struct nfs_fh *fhandle)
6b97fd3d
MN		 2614{
2615 int status = -ENOMEM;
2616 struct page *page = NULL;
2617 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2618
2619 page = alloc_page(GFP_KERNEL);
2620 if (page == NULL)
2621 goto out;
2622 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2623 if (locations == NULL)
2624 goto out;
2625
f05d147f 2626 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2627 if (status != 0)
2628 goto out;
2629 /* Make sure server returned a different fsid for the referral */
2630 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2631 dprintk("%s: server did not return a different fsid for"
2632 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2633 status = -EIO;
2634 goto out;
2635 }
533eb461
AA		 2636 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2637 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2638
533eb461 2639 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2640 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2641 memset(fhandle, 0, sizeof(struct nfs_fh));
2642out:
2643 if (page)
2644 __free_page(page);
5d7ca35a 2645 kfree(locations);
6b97fd3d
MN		 2646 return status;
2647}
2648
1da177e4
LT		 2649static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2650{
2651 struct nfs4_getattr_arg args = {
2652 .fh = fhandle,
2653 .bitmask = server->attr_bitmask,
2654 };
2655 struct nfs4_getattr_res res = {
2656 .fattr = fattr,
2657 .server = server,
2658 };
2659 struct rpc_message msg = {
2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2661 .rpc_argp = &args,
2662 .rpc_resp = &res,
2663 };
2664
0e574af1 2665 nfs_fattr_init(fattr);
7c513058 2666 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2667}
2668
2669static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2670{
2671 struct nfs4_exception exception = { };
2672 int err;
2673 do {
2674 err = nfs4_handle_exception(server,
2675 _nfs4_proc_getattr(server, fhandle, fattr),
2676 &exception);
2677 } while (exception.retry);
2678 return err;
2679}
2680
2681/*
2682 * The file is not closed if it is opened due to the a request to change
2683 * the size of the file. The open call will not be needed once the
2684 * VFS layer lookup-intents are implemented.
2685 *
2686 * Close is called when the inode is destroyed.
2687 * If we haven't opened the file for O_WRONLY, we
2688 * need to in the size_change case to obtain a stateid.
2689 *
2690 * Got race?
2691 * Because OPEN is always done by name in nfsv4, it is
2692 * possible that we opened a different file by the same
2693 * name. We can recognize this race condition, but we
2694 * can't do anything about it besides returning an error.
2695 *
2696 * This will be fixed with VFS changes (lookup-intent).
2697 */
2698static int
2699nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2700 struct iattr *sattr)
2701{
08e9eac4 2702 struct inode *inode = dentry->d_inode;
659bfcd6 2703 struct rpc_cred *cred = NULL;
d530838b 2704 struct nfs4_state *state = NULL;
1da177e4
LT		 2705 int status;
2706
8a1636c4
BH		 2707 if (pnfs_ld_layoutret_on_setattr(inode))
2708 pnfs_return_layout(inode);
2709
0e574af1 2710 nfs_fattr_init(fattr);
1da177e4 2711
2669940d
AA		 2712 /* Deal with open(O_TRUNC) */
2713 if (sattr->ia_valid & ATTR_OPEN)
2714 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2715
2716 /* Optimization: if the end result is no change, don't RPC */
2717 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2718 return 0;
2719
d530838b 2720 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2721 if (sattr->ia_valid & ATTR_FILE) {
2722 struct nfs_open_context *ctx;
2723
2724 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2725 if (ctx) {
2726 cred = ctx->cred;
2727 state = ctx->state;
2728 }
659bfcd6 2729 }
08e9eac4 2730
659bfcd6 2731 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2732 if (status == 0)
2733 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2734 return status;
2735}
2736
0c2e53f1
TM		 2737static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2738 const struct qstr *name, struct nfs_fh *fhandle,
2739 struct nfs_fattr *fattr)
2b3de441 2740{
0c2e53f1 2741 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2742 int status;
2743 struct nfs4_lookup_arg args = {
2744 .bitmask = server->attr_bitmask,
0c2e53f1 2745 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2746 .name = name,
2747 };
2748 struct nfs4_lookup_res res = {
2749 .server = server,
2750 .fattr = fattr,
2751 .fh = fhandle,
2752 };
2753 struct rpc_message msg = {
2754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2755 .rpc_argp = &args,
2756 .rpc_resp = &res,
2757 };
2758
2759 nfs_fattr_init(fattr);
2760
1da177e4 2761 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2762 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2763 dprintk("NFS reply lookup: %d\n", status);
2764 return status;
2765}
2766
72de53ec 2767static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2768{
7ebb9315 2769 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2770 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2771 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2772 fattr->nlink = 2;
2773}
2774
72de53ec
BS		 2775static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2776 struct qstr *name, struct nfs_fh *fhandle,
2777 struct nfs_fattr *fattr)
1da177e4
LT		 2778{
2779 struct nfs4_exception exception = { };
72de53ec 2780 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2781 int err;
2782 do {
72de53ec
BS		 2783 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2784 switch (err) {
08ef7bd3 2785 case -NFS4ERR_BADNAME:
72de53ec
BS		 2786 err = -ENOENT;
2787 goto out;
0c2e53f1 2788 case -NFS4ERR_MOVED:
f05d147f 2789 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2790 goto out;
0c2e53f1 2791 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2792 err = -EPERM;
2793 if (client != *clnt)
2794 goto out;
2795
2796 client = nfs4_create_sec_client(client, dir, name);
2797 if (IS_ERR(client))
2798 return PTR_ERR(client);
2799
2800 exception.retry = 1;
2801 break;
2802 default:
2803 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2804 }
1da177e4 2805 } while (exception.retry);
72de53ec
BS		 2806
2807out:
2808 if (err == 0)
2809 *clnt = client;
2810 else if (client != *clnt)
2811 rpc_shutdown_client(client);
2812
1da177e4
LT		 2813 return err;
2814}
2815
80a16b21 2816static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2817 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2818{
2819 int status;
2820 struct rpc_clnt *client = NFS_CLIENT(dir);
2821
2822 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2823 if (client != NFS_CLIENT(dir)) {
2824 rpc_shutdown_client(client);
2825 nfs_fixup_secinfo_attributes(fattr);
2826 }
2827 return status;
2828}
2829
f05d147f
BS		 2830struct rpc_clnt *
2831nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2832 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2833{
2834 int status;
2835 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2836
2837 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2838 if (status < 0) {
2839 rpc_shutdown_client(client);
2840 return ERR_PTR(status);
2841 }
2842 return client;
2843}
2844
1da177e4
LT		 2845static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2846{
76b32999 2847 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2848 struct nfs4_accessargs args = {
2849 .fh = NFS_FH(inode),
a4980e78 2850 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2851 };
2852 struct nfs4_accessres res = {
2853 .server = server,
1da177e4 2854 };
1da177e4
LT		 2855 struct rpc_message msg = {
2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2857 .rpc_argp = &args,
2858 .rpc_resp = &res,
2859 .rpc_cred = entry->cred,
2860 };
2861 int mode = entry->mask;
2862 int status;
2863
2864 /*
2865 * Determine which access bits we want to ask for...
2866 */
2867 if (mode & MAY_READ)
2868 args.access |= NFS4_ACCESS_READ;
2869 if (S_ISDIR(inode->i_mode)) {
2870 if (mode & MAY_WRITE)
2871 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2872 if (mode & MAY_EXEC)
2873 args.access |= NFS4_ACCESS_LOOKUP;
2874 } else {
2875 if (mode & MAY_WRITE)
2876 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2877 if (mode & MAY_EXEC)
2878 args.access |= NFS4_ACCESS_EXECUTE;
2879 }
c407d41a
TM		 2880
2881 res.fattr = nfs_alloc_fattr();
2882 if (res.fattr == NULL)
2883 return -ENOMEM;
2884
7c513058 2885 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2886 if (!status) {
6168f62c 2887 nfs_access_set_mask(entry, res.access);
c407d41a 2888 nfs_refresh_inode(inode, res.fattr);
1da177e4 2889 }
c407d41a 2890 nfs_free_fattr(res.fattr);
1da177e4
LT		 2891 return status;
2892}
2893
2894static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2895{
2896 struct nfs4_exception exception = { };
2897 int err;
2898 do {
2899 err = nfs4_handle_exception(NFS_SERVER(inode),
2900 _nfs4_proc_access(inode, entry),
2901 &exception);
2902 } while (exception.retry);
2903 return err;
2904}
2905
2906/*
2907 * TODO: For the time being, we don't try to get any attributes
2908 * along with any of the zero-copy operations READ, READDIR,
2909 * READLINK, WRITE.
2910 *
2911 * In the case of the first three, we want to put the GETATTR
2912 * after the read-type operation -- this is because it is hard
2913 * to predict the length of a GETATTR response in v4, and thus
2914 * align the READ data correctly. This means that the GETATTR
2915 * may end up partially falling into the page cache, and we should
2916 * shift it into the 'tail' of the xdr_buf before processing.
2917 * To do this efficiently, we need to know the total length
2918 * of data received, which doesn't seem to be available outside
2919 * of the RPC layer.
2920 *
2921 * In the case of WRITE, we also want to put the GETATTR after
2922 * the operation -- in this case because we want to make sure
140150db 2923 * we get the post-operation mtime and size.
1da177e4
LT		 2924 *
2925 * Both of these changes to the XDR layer would in fact be quite
2926 * minor, but I decided to leave them for a subsequent patch.
2927 */
2928static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2929 unsigned int pgbase, unsigned int pglen)
2930{
2931 struct nfs4_readlink args = {
2932 .fh = NFS_FH(inode),
2933 .pgbase = pgbase,
2934 .pglen = pglen,
2935 .pages = &page,
2936 };
f50c7000 2937 struct nfs4_readlink_res res;
1da177e4
LT		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2940 .rpc_argp = &args,
f50c7000 2941 .rpc_resp = &res,
1da177e4
LT		 2942 };
2943
7c513058 2944 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2945}
2946
2947static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2948 unsigned int pgbase, unsigned int pglen)
2949{
2950 struct nfs4_exception exception = { };
2951 int err;
2952 do {
2953 err = nfs4_handle_exception(NFS_SERVER(inode),
2954 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2955 &exception);
2956 } while (exception.retry);
2957 return err;
2958}
2959
1da177e4 2960/*
8867fe58 2961 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2962 */
1da177e4
LT		 2963static int
2964nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2965 int flags)
1da177e4 2966{
8867fe58 2967 struct nfs_open_context *ctx;
1da177e4 2968 struct nfs4_state *state;
1da177e4
LT		 2969 int status = 0;
2970
8867fe58
MS		 2971 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2972 if (IS_ERR(ctx))
2973 return PTR_ERR(ctx);
2974
a8a5da99 2975 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2976 state = nfs4_do_open(dir, dentry, ctx->mode,
2977 flags, sattr, ctx->cred,
2978 &ctx->mdsthreshold);
d4d9cdcb 2979 d_drop(dentry);
1da177e4
LT		 2980 if (IS_ERR(state)) {
2981 status = PTR_ERR(state);
c0204fd2 2982 goto out;
1da177e4 2983 }
d4d9cdcb 2984 d_add(dentry, igrab(state->inode));
d75340cc 2985 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2986 ctx->state = state;
1da177e4 2987out:
8867fe58 2988 put_nfs_open_context(ctx);
1da177e4
LT		 2989 return status;
2990}
2991
2992static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2993{
16e42959 2994 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2995 struct nfs_removeargs args = {
1da177e4 2996 .fh = NFS_FH(dir),
26fe5750 2997 .name = *name,
16e42959 2998 };
4fdc17b2 2999 struct nfs_removeres res = {
16e42959 3000 .server = server,
1da177e4 3001 };
1da177e4 3002 struct rpc_message msg = {
4fdc17b2
TM		 3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3004 .rpc_argp = &args,
3005 .rpc_resp = &res,
1da177e4 3006 };
778d2817 3007 int status;
1da177e4 3008
7c513058 3009 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3010 if (status == 0)
16e42959 3011 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3012 return status;
3013}
3014
3015static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019 do {
3020 err = nfs4_handle_exception(NFS_SERVER(dir),
3021 _nfs4_proc_remove(dir, name),
3022 &exception);
3023 } while (exception.retry);
3024 return err;
3025}
3026
e4eff1a6 3027static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3028{
e4eff1a6
TM		 3029 struct nfs_server *server = NFS_SERVER(dir);
3030 struct nfs_removeargs *args = msg->rpc_argp;
3031 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3032
e4eff1a6 3033 res->server = server;
1da177e4 3034 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3035 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3036}
3037
34e137cc
BS		 3038static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3039{
3040 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3041 &data->args.seq_args,
3042 &data->res.seq_res,
3043 task))
3044 return;
3045 rpc_call_start(task);
1da177e4
LT		 3046}
3047
e4eff1a6 3048static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3049{
e4eff1a6
TM		 3050 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3051
14516c3a
TM		 3052 if (!nfs4_sequence_done(task, &res->seq_res))
3053 return 0;
9e33bed5 3054 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3055 return 0;
3056 update_changeattr(dir, &res->cinfo);
e4eff1a6 3057 return 1;
1da177e4
LT		 3058}
3059
d3d4152a
JL		 3060static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3061{
3062 struct nfs_server *server = NFS_SERVER(dir);
3063 struct nfs_renameargs *arg = msg->rpc_argp;
3064 struct nfs_renameres *res = msg->rpc_resp;
3065
3066 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3067 res->server = server;
9d12b216 3068 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3069}
3070
c6bfa1a1
BS		 3071static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3072{
3073 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3074 &data->args.seq_args,
3075 &data->res.seq_res,
3076 task))
3077 return;
3078 rpc_call_start(task);
d3d4152a
JL		 3079}
3080
3081static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3082 struct inode *new_dir)
3083{
3084 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3085
3086 if (!nfs4_sequence_done(task, &res->seq_res))
3087 return 0;
3088 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3089 return 0;
3090
3091 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3092 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3093 return 1;
3094}
3095
1da177e4
LT		 3096static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3097 struct inode *new_dir, struct qstr *new_name)
3098{
6caf2c82 3099 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3100 struct nfs_renameargs arg = {
1da177e4
LT		 3101 .old_dir = NFS_FH(old_dir),
3102 .new_dir = NFS_FH(new_dir),
3103 .old_name = old_name,
3104 .new_name = new_name,
6caf2c82 3105 };
e8582a8b 3106 struct nfs_renameres res = {
6caf2c82 3107 .server = server,
1da177e4 3108 };
1da177e4
LT		 3109 struct rpc_message msg = {
3110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3111 .rpc_argp = &arg,
3112 .rpc_resp = &res,
3113 };
011fff72 3114 int status = -ENOMEM;
1da177e4 3115
7c513058 3116 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3117 if (!status) {
3118 update_changeattr(old_dir, &res.old_cinfo);
3119 update_changeattr(new_dir, &res.new_cinfo);
3120 }
3121 return status;
3122}
3123
3124static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3125 struct inode *new_dir, struct qstr *new_name)
3126{
3127 struct nfs4_exception exception = { };
3128 int err;
3129 do {
3130 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3131 _nfs4_proc_rename(old_dir, old_name,
3132 new_dir, new_name),
3133 &exception);
3134 } while (exception.retry);
3135 return err;
3136}
3137
3138static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3139{
91ba2eee 3140 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3141 struct nfs4_link_arg arg = {
3142 .fh = NFS_FH(inode),
3143 .dir_fh = NFS_FH(dir),
3144 .name = name,
91ba2eee
TM		 3145 .bitmask = server->attr_bitmask,
3146 };
91ba2eee
TM		 3147 struct nfs4_link_res res = {
3148 .server = server,
1da177e4 3149 };
1da177e4
LT		 3150 struct rpc_message msg = {
3151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3152 .rpc_argp = &arg,
91ba2eee 3153 .rpc_resp = &res,
1da177e4 3154 };
136f2627
TM		 3155 int status = -ENOMEM;
3156
3157 res.fattr = nfs_alloc_fattr();
778d2817 3158 if (res.fattr == NULL)
136f2627 3159 goto out;
1da177e4 3160
7c513058 3161 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3162 if (!status) {
3163 update_changeattr(dir, &res.cinfo);
73a3d07c 3164 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3165 }
136f2627 3166out:
136f2627 3167 nfs_free_fattr(res.fattr);
1da177e4
LT		 3168 return status;
3169}
3170
3171static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3172{
3173 struct nfs4_exception exception = { };
3174 int err;
3175 do {
3176 err = nfs4_handle_exception(NFS_SERVER(inode),
3177 _nfs4_proc_link(inode, dir, name),
3178 &exception);
3179 } while (exception.retry);
3180 return err;
3181}
3182
57dc9a57
TM		 3183struct nfs4_createdata {
3184 struct rpc_message msg;
3185 struct nfs4_create_arg arg;
3186 struct nfs4_create_res res;
3187 struct nfs_fh fh;
3188 struct nfs_fattr fattr;
57dc9a57
TM		 3189};
3190
3191static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3192 struct qstr *name, struct iattr *sattr, u32 ftype)
3193{
3194 struct nfs4_createdata *data;
3195
3196 data = kzalloc(sizeof(*data), GFP_KERNEL);
3197 if (data != NULL) {
3198 struct nfs_server *server = NFS_SERVER(dir);
3199
3200 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3201 data->msg.rpc_argp = &data->arg;
3202 data->msg.rpc_resp = &data->res;
3203 data->arg.dir_fh = NFS_FH(dir);
3204 data->arg.server = server;
3205 data->arg.name = name;
3206 data->arg.attrs = sattr;
3207 data->arg.ftype = ftype;
3208 data->arg.bitmask = server->attr_bitmask;
3209 data->res.server = server;
3210 data->res.fh = &data->fh;
3211 data->res.fattr = &data->fattr;
57dc9a57 3212 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3213 }
3214 return data;
3215}
3216
3217static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3218{
7c513058 3219 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3220 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3221 if (status == 0) {
3222 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3223 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3224 }
3225 return status;
3226}
3227
3228static void nfs4_free_createdata(struct nfs4_createdata *data)
3229{
3230 kfree(data);
3231}
3232
4f390c15 3233static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3234 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3235{
57dc9a57
TM		 3236 struct nfs4_createdata *data;
3237 int status = -ENAMETOOLONG;
1da177e4 3238
94a6d753 3239 if (len > NFS4_MAXPATHLEN)
57dc9a57 3240 goto out;
4f390c15 3241
57dc9a57
TM		 3242 status = -ENOMEM;
3243 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3244 if (data == NULL)
3245 goto out;
3246
3247 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3248 data->arg.u.symlink.pages = &page;
3249 data->arg.u.symlink.len = len;
1da177e4 3250
57dc9a57
TM		 3251 status = nfs4_do_create(dir, dentry, data);
3252
3253 nfs4_free_createdata(data);
3254out:
1da177e4
LT		 3255 return status;
3256}
3257
4f390c15 3258static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3259 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3260{
3261 struct nfs4_exception exception = { };
3262 int err;
3263 do {
3264 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3265 _nfs4_proc_symlink(dir, dentry, page,
3266 len, sattr),
1da177e4
LT		 3267 &exception);
3268 } while (exception.retry);
3269 return err;
3270}
3271
3272static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3273 struct iattr *sattr)
3274{
57dc9a57
TM		 3275 struct nfs4_createdata *data;
3276 int status = -ENOMEM;
1da177e4 3277
57dc9a57
TM		 3278 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3279 if (data == NULL)
3280 goto out;
3281
3282 status = nfs4_do_create(dir, dentry, data);
3283
3284 nfs4_free_createdata(data);
3285out:
1da177e4
LT		 3286 return status;
3287}
3288
3289static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3290 struct iattr *sattr)
3291{
3292 struct nfs4_exception exception = { };
3293 int err;
a8a5da99
AK		 3294
3295 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3296 do {
3297 err = nfs4_handle_exception(NFS_SERVER(dir),
3298 _nfs4_proc_mkdir(dir, dentry, sattr),
3299 &exception);
3300 } while (exception.retry);
3301 return err;
3302}
3303
3304static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3305 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3306{
3307 struct inode *dir = dentry->d_inode;
3308 struct nfs4_readdir_arg args = {
3309 .fh = NFS_FH(dir),
56e4ebf8 3310 .pages = pages,
1da177e4
LT		 3311 .pgbase = 0,
3312 .count = count,
96d25e53 3313 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3314 .plus = plus,
1da177e4
LT		 3315 };
3316 struct nfs4_readdir_res res;
3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3319 .rpc_argp = &args,
3320 .rpc_resp = &res,
3321 .rpc_cred = cred,
3322 };
3323 int status;
3324
3110ff80 3325 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3326 dentry->d_parent->d_name.name,
3327 dentry->d_name.name,
3328 (unsigned long long)cookie);
c3f52af3 3329 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3330 res.pgbase = args.pgbase;
7c513058 3331 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3332 if (status >= 0) {
c3f52af3 3333 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3334 status += args.pgbase;
3335 }
c4812998
TM		 3336
3337 nfs_invalidate_atime(dir);
3338
3110ff80 3339 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3340 return status;
3341}
3342
3343static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3344 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3345{
3346 struct nfs4_exception exception = { };
3347 int err;
3348 do {
3349 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3350 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3351 pages, count, plus),
1da177e4
LT		 3352 &exception);
3353 } while (exception.retry);
3354 return err;
3355}
3356
3357static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3358 struct iattr *sattr, dev_t rdev)
3359{
57dc9a57
TM		 3360 struct nfs4_createdata *data;
3361 int mode = sattr->ia_mode;
3362 int status = -ENOMEM;
1da177e4 3363
57dc9a57
TM		 3364 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3365 if (data == NULL)
3366 goto out;
3367
1da177e4 3368 if (S_ISFIFO(mode))
57dc9a57 3369 data->arg.ftype = NF4FIFO;
1da177e4 3370 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3371 data->arg.ftype = NF4BLK;
3372 data->arg.u.device.specdata1 = MAJOR(rdev);
3373 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3374 }
3375 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3376 data->arg.ftype = NF4CHR;
3377 data->arg.u.device.specdata1 = MAJOR(rdev);
3378 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3379 } else if (!S_ISSOCK(mode)) {
3380 status = -EINVAL;
3381 goto out_free;
1da177e4 3382 }
1da177e4 3383
57dc9a57 3384 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3385out_free:
57dc9a57
TM		 3386 nfs4_free_createdata(data);
3387out:
1da177e4
LT		 3388 return status;
3389}
3390
3391static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3392 struct iattr *sattr, dev_t rdev)
3393{
3394 struct nfs4_exception exception = { };
3395 int err;
a8a5da99
AK		 3396
3397 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3398 do {
3399 err = nfs4_handle_exception(NFS_SERVER(dir),
3400 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3401 &exception);
3402 } while (exception.retry);
3403 return err;
3404}
3405
3406static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3407 struct nfs_fsstat *fsstat)
3408{
3409 struct nfs4_statfs_arg args = {
3410 .fh = fhandle,
3411 .bitmask = server->attr_bitmask,
3412 };
24ad148a
BH		 3413 struct nfs4_statfs_res res = {
3414 .fsstat = fsstat,
3415 };
1da177e4
LT		 3416 struct rpc_message msg = {
3417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3418 .rpc_argp = &args,
24ad148a 3419 .rpc_resp = &res,
1da177e4
LT		 3420 };
3421
0e574af1 3422 nfs_fattr_init(fsstat->fattr);
7c513058 3423 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3424}
3425
3426static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3427{
3428 struct nfs4_exception exception = { };
3429 int err;
3430 do {
3431 err = nfs4_handle_exception(server,
3432 _nfs4_proc_statfs(server, fhandle, fsstat),
3433 &exception);
3434 } while (exception.retry);
3435 return err;
3436}
3437
3438static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3439 struct nfs_fsinfo *fsinfo)
3440{
3441 struct nfs4_fsinfo_arg args = {
3442 .fh = fhandle,
3443 .bitmask = server->attr_bitmask,
3444 };
3dda5e43
BH		 3445 struct nfs4_fsinfo_res res = {
3446 .fsinfo = fsinfo,
3447 };
1da177e4
LT		 3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3450 .rpc_argp = &args,
3dda5e43 3451 .rpc_resp = &res,
1da177e4
LT		 3452 };
3453
7c513058 3454 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3455}
3456
3457static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3458{
3459 struct nfs4_exception exception = { };
3460 int err;
3461
3462 do {
3463 err = nfs4_handle_exception(server,
3464 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3465 &exception);
3466 } while (exception.retry);
3467 return err;
3468}
3469
3470static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3471{
e38eb650
BS		 3472 int error;
3473
0e574af1 3474 nfs_fattr_init(fsinfo->fattr);
e38eb650 3475 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3476 if (error == 0) {
3477 /* block layout checks this! */
3478 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3479 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3480 }
e38eb650
BS		 3481
3482 return error;
1da177e4
LT		 3483}
3484
3485static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3486 struct nfs_pathconf *pathconf)
3487{
3488 struct nfs4_pathconf_arg args = {
3489 .fh = fhandle,
3490 .bitmask = server->attr_bitmask,
3491 };
d45b2989
BH		 3492 struct nfs4_pathconf_res res = {
3493 .pathconf = pathconf,
3494 };
1da177e4
LT		 3495 struct rpc_message msg = {
3496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3497 .rpc_argp = &args,
d45b2989 3498 .rpc_resp = &res,
1da177e4
LT		 3499 };
3500
3501 /* None of the pathconf attributes are mandatory to implement */
3502 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3503 memset(pathconf, 0, sizeof(*pathconf));
3504 return 0;
3505 }
3506
0e574af1 3507 nfs_fattr_init(pathconf->fattr);
7c513058 3508 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3509}
3510
3511static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3512 struct nfs_pathconf *pathconf)
3513{
3514 struct nfs4_exception exception = { };
3515 int err;
3516
3517 do {
3518 err = nfs4_handle_exception(server,
3519 _nfs4_proc_pathconf(server, fhandle, pathconf),
3520 &exception);
3521 } while (exception.retry);
3522 return err;
3523}
3524
d20581aa
BH		 3525void __nfs4_read_done_cb(struct nfs_read_data *data)
3526{
cd841605 3527 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3528}
3529
cbdabc7f 3530static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3531{
cd841605 3532 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3533
9e33bed5 3534 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3535 rpc_restart_call_prepare(task);
ec06c096 3536 return -EAGAIN;
1da177e4 3537 }
8850df99 3538
d20581aa 3539 __nfs4_read_done_cb(data);
1da177e4 3540 if (task->tk_status > 0)
ec06c096
TM		 3541 renew_lease(server, data->timestamp);
3542 return 0;
1da177e4
LT		 3543}
3544
cbdabc7f
AA		 3545static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3546{
3547
3548 dprintk("--> %s\n", __func__);
3549
3550 if (!nfs4_sequence_done(task, &data->res.seq_res))
3551 return -EAGAIN;
3552
d20581aa
BH		 3553 return data->read_done_cb ? data->read_done_cb(task, data) :
3554 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3555}
3556
bdc7f021 3557static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3558{
1da177e4 3559 data->timestamp = jiffies;
cbdabc7f 3560 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3561 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3562 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3563}
3564
ea7c3303
BS		 3565static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3566{
cd841605 3567 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3568 &data->args.seq_args,
3569 &data->res.seq_res,
3570 task))
3571 return;
3572 rpc_call_start(task);
1da177e4
LT		 3573}
3574
b029bc9b 3575static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3576{
cd841605 3577 struct inode *inode = data->header->inode;
1da177e4 3578
9e33bed5 3579 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3580 rpc_restart_call_prepare(task);
788e7a89 3581 return -EAGAIN;
1da177e4 3582 }
4f9838c7 3583 if (task->tk_status >= 0) {
1da177e4 3584 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3585 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3586 }
788e7a89 3587 return 0;
1da177e4
LT		 3588}
3589
b029bc9b
FI		 3590static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3591{
3592 if (!nfs4_sequence_done(task, &data->res.seq_res))
3593 return -EAGAIN;
d20581aa
BH		 3594 return data->write_done_cb ? data->write_done_cb(task, data) :
3595 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3596}
3597
5a37f851
TM		 3598static
3599bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3600{
5a37f851
TM		 3601 const struct nfs_pgio_header *hdr = data->header;
3602
3603 /* Don't request attributes for pNFS or O_DIRECT writes */
3604 if (data->ds_clp != NULL || hdr->dreq != NULL)
3605 return false;
3606 /* Otherwise, request attributes if and only if we don't hold
3607 * a delegation
3608 */
011e2a7f 3609 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3610}
a69aef14 3611
bdc7f021 3612static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3613{
cd841605 3614 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3615
5a37f851 3616 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3617 data->args.bitmask = NULL;
3618 data->res.fattr = NULL;
3619 } else
3620 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3621
b029bc9b
FI		 3622 if (!data->write_done_cb)
3623 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3624 data->res.server = server;
1da177e4
LT		 3625 data->timestamp = jiffies;
3626
bdc7f021 3627 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3628 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3629}
3630
c6cb80d0
BS		 3631static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3632{
cd841605 3633 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3634 &data->args.seq_args,
3635 &data->res.seq_res,
3636 task))
3637 return;
3638 rpc_call_start(task);
1da177e4
LT		 3639}
3640
0b7c0153 3641static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3642{
3643 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3644 &data->args.seq_args,
3645 &data->res.seq_res,
3646 task))
3647 return;
3648 rpc_call_start(task);
1da177e4
LT		 3649}
3650
0b7c0153 3651static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3652{
1da177e4 3653 struct inode *inode = data->inode;
14516c3a 3654
9e33bed5 3655 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3656 rpc_restart_call_prepare(task);
788e7a89 3657 return -EAGAIN;
1da177e4 3658 }
788e7a89 3659 return 0;
1da177e4
LT		 3660}
3661
0b7c0153 3662static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3663{
3664 if (!nfs4_sequence_done(task, &data->res.seq_res))
3665 return -EAGAIN;
0b7c0153 3666 return data->commit_done_cb(task, data);
5f452431
FI		 3667}
3668
0b7c0153 3669static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3670{
788e7a89 3671 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3672
0b7c0153
FI		 3673 if (data->commit_done_cb == NULL)
3674 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3675 data->res.server = server;
bdc7f021 3676 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3677 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3678}
3679
9bc4e3ca
CL		 3680struct nfs4_renewdata {
3681 struct nfs_client *client;
3682 unsigned long timestamp;
3683};
3684
1da177e4
LT		 3685/*
3686 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3687 * standalone procedure for queueing an asynchronous RENEW.
3688 */
9bc4e3ca 3689static void nfs4_renew_release(void *calldata)
dc96aef9 3690{
9bc4e3ca
CL		 3691 struct nfs4_renewdata *data = calldata;
3692 struct nfs_client *clp = data->client;
dc96aef9 3693
0851de06
AB		 3694 if (atomic_read(&clp->cl_count) > 1)
3695 nfs4_schedule_state_renewal(clp);
3696 nfs_put_client(clp);
9bc4e3ca 3697 kfree(data);
dc96aef9
AB		 3698}
3699
9bc4e3ca 3700static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3701{
9bc4e3ca
CL		 3702 struct nfs4_renewdata *data = calldata;
3703 struct nfs_client *clp = data->client;
3704 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3705
3706 if (task->tk_status < 0) {
95baa25c 3707 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3708 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3709 return;
3710 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3711 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3712 return;
3713 }
3714 nfs4_schedule_path_down_recovery(clp);
1da177e4 3715 }
452e9352 3716 do_renew_lease(clp, timestamp);
1da177e4
LT		 3717}
3718
963d8fe5
TM		 3719static const struct rpc_call_ops nfs4_renew_ops = {
3720 .rpc_call_done = nfs4_renew_done,
dc96aef9 3721 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3722};
3723
2f60ea6b 3724static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3725{
3726 struct rpc_message msg = {
3727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3728 .rpc_argp = clp,
b4454fe1 3729 .rpc_cred = cred,
1da177e4 3730 };
9bc4e3ca 3731 struct nfs4_renewdata *data;
1da177e4 3732
2f60ea6b
TM		 3733 if (renew_flags == 0)
3734 return 0;
0851de06
AB		 3735 if (!atomic_inc_not_zero(&clp->cl_count))
3736 return -EIO;
b569ad34 3737 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3738 if (data == NULL)
3739 return -ENOMEM;
3740 data->client = clp;
3741 data->timestamp = jiffies;
1da177e4 3742 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3743 &nfs4_renew_ops, data);
1da177e4
LT		 3744}
3745
8534d4ec 3746static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3747{
3748 struct rpc_message msg = {
3749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3750 .rpc_argp = clp,
b4454fe1 3751 .rpc_cred = cred,
1da177e4
LT		 3752 };
3753 unsigned long now = jiffies;
3754 int status;
3755
3756 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3757 if (status < 0)
3758 return status;
452e9352 3759 do_renew_lease(clp, now);
1da177e4
LT		 3760 return 0;
3761}
3762
aa1870af
BF		 3763static inline int nfs4_server_supports_acls(struct nfs_server *server)
3764{
3765 return (server->caps & NFS_CAP_ACLS)
3766 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3767 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3768}
3769
21f498c2
TM		 3770/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3771 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3772 * the stack.
3773 */
21f498c2 3774#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3775
e9e3d724
NH		 3776static int buf_to_pages_noslab(const void *buf, size_t buflen,
3777 struct page **pages, unsigned int *pgbase)
3778{
3779 struct page *newpage, **spages;
3780 int rc = 0;
3781 size_t len;
3782 spages = pages;
3783
3784 do {
21f498c2 3785 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3786 newpage = alloc_page(GFP_KERNEL);
3787
3788 if (newpage == NULL)
3789 goto unwind;
3790 memcpy(page_address(newpage), buf, len);
3791 buf += len;
3792 buflen -= len;
3793 *pages++ = newpage;
3794 rc++;
3795 } while (buflen != 0);
3796
3797 return rc;
3798
3799unwind:
3800 for(; rc > 0; rc--)
3801 __free_page(spages[rc-1]);
3802 return -ENOMEM;
3803}
3804
e50a1c2e
BF		 3805struct nfs4_cached_acl {
3806 int cached;
3807 size_t len;
3e9d4154 3808 char data[0];
e50a1c2e
BF		 3809};
3810
3811static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3812{
3813 struct nfs_inode *nfsi = NFS_I(inode);
3814
3815 spin_lock(&inode->i_lock);
3816 kfree(nfsi->nfs4_acl);
3817 nfsi->nfs4_acl = acl;
3818 spin_unlock(&inode->i_lock);
3819}
3820
3821static void nfs4_zap_acl_attr(struct inode *inode)
3822{
3823 nfs4_set_cached_acl(inode, NULL);
3824}
3825
3826static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3827{
3828 struct nfs_inode *nfsi = NFS_I(inode);
3829 struct nfs4_cached_acl *acl;
3830 int ret = -ENOENT;
3831
3832 spin_lock(&inode->i_lock);
3833 acl = nfsi->nfs4_acl;
3834 if (acl == NULL)
3835 goto out;
3836 if (buf == NULL) /* user is just asking for length */
3837 goto out_len;
3838 if (acl->cached == 0)
3839 goto out;
3840 ret = -ERANGE; /* see getxattr(2) man page */
3841 if (acl->len > buflen)
3842 goto out;
3843 memcpy(buf, acl->data, acl->len);
3844out_len:
3845 ret = acl->len;
3846out:
3847 spin_unlock(&inode->i_lock);
3848 return ret;
3849}
3850
5794d21e 3851static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3852{
3853 struct nfs4_cached_acl *acl;
b291f1b1 3854 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3855
1f1ea6c2 3856 if (buflen <= PAGE_SIZE) {
b291f1b1 3857 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3858 if (acl == NULL)
3859 goto out;
3860 acl->cached = 1;
5794d21e 3861 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3862 } else {
3863 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3864 if (acl == NULL)
3865 goto out;
3866 acl->cached = 0;
3867 }
3868 acl->len = acl_len;
3869out:
3870 nfs4_set_cached_acl(inode, acl);
3871}
3872
bf118a34
AA		 3873/*
3874 * The getxattr API returns the required buffer length when called with a
3875 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3876 * the required buf. On a NULL buf, we send a page of data to the server
3877 * guessing that the ACL request can be serviced by a page. If so, we cache
3878 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3879 * the cache. If not so, we throw away the page, and cache the required
3880 * length. The next getxattr call will then produce another round trip to
3881 * the server, this time with the input buf of the required size.
3882 */
16b4289c 3883static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3884{
bf118a34 3885 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3886 struct nfs_getaclargs args = {
3887 .fh = NFS_FH(inode),
3888 .acl_pages = pages,
3889 .acl_len = buflen,
3890 };
663c79b3
BH		 3891 struct nfs_getaclres res = {
3892 .acl_len = buflen,
3893 };
aa1870af
BF		 3894 struct rpc_message msg = {
3895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3896 .rpc_argp = &args,
663c79b3 3897 .rpc_resp = &res,
aa1870af 3898 };
21f498c2
TM		 3899 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3900 int ret = -ENOMEM, i;
aa1870af 3901
bf118a34
AA		 3902 /* As long as we're doing a round trip to the server anyway,
3903 * let's be prepared for a page of acl data. */
3904 if (npages == 0)
3905 npages = 1;
21f498c2
TM		 3906 if (npages > ARRAY_SIZE(pages))
3907 return -ERANGE;
5a006899 3908
bf118a34
AA		 3909 for (i = 0; i < npages; i++) {
3910 pages[i] = alloc_page(GFP_KERNEL);
3911 if (!pages[i])
3912 goto out_free;
e50a1c2e 3913 }
5a006899
SP		 3914
3915 /* for decoding across pages */
3916 res.acl_scratch = alloc_page(GFP_KERNEL);
3917 if (!res.acl_scratch)
3918 goto out_free;
3919
bf118a34
AA		 3920 args.acl_len = npages * PAGE_SIZE;
3921 args.acl_pgbase = 0;
5a006899 3922
de040bec 3923 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3924 __func__, buf, buflen, npages, args.acl_len);
3925 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3926 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3927 if (ret)
3928 goto out_free;
bf118a34 3929
1f1ea6c2
TM		 3930 /* Handle the case where the passed-in buffer is too short */
3931 if (res.acl_flags & NFS4_ACL_TRUNC) {
3932 /* Did the user only issue a request for the acl length? */
3933 if (buf == NULL)
3934 goto out_ok;
e50a1c2e 3935 ret = -ERANGE;
1f1ea6c2 3936 goto out_free;
e50a1c2e 3937 }
1f1ea6c2
TM		 3938 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3939 if (buf)
3940 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3941out_ok:
3942 ret = res.acl_len;
e50a1c2e 3943out_free:
bf118a34
AA		 3944 for (i = 0; i < npages; i++)
3945 if (pages[i])
3946 __free_page(pages[i]);
331818f1
TM		 3947 if (res.acl_scratch)
3948 __free_page(res.acl_scratch);
aa1870af
BF		 3949 return ret;
3950}
3951
16b4289c
TM		 3952static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3953{
3954 struct nfs4_exception exception = { };
3955 ssize_t ret;
3956 do {
3957 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3958 if (ret >= 0)
3959 break;
3960 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3961 } while (exception.retry);
3962 return ret;
3963}
3964
e50a1c2e
BF		 3965static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3966{
3967 struct nfs_server *server = NFS_SERVER(inode);
3968 int ret;
3969
3970 if (!nfs4_server_supports_acls(server))
3971 return -EOPNOTSUPP;
3972 ret = nfs_revalidate_inode(server, inode);
3973 if (ret < 0)
3974 return ret;
08a22b39
AK		 3975 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3976 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3977 ret = nfs4_read_cached_acl(inode, buf, buflen);
3978 if (ret != -ENOENT)
bf118a34
AA		 3979 /* -ENOENT is returned if there is no ACL or if there is an ACL
3980 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3981 return ret;
3982 return nfs4_get_acl_uncached(inode, buf, buflen);
3983}
3984
16b4289c 3985static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3986{
3987 struct nfs_server *server = NFS_SERVER(inode);
3988 struct page *pages[NFS4ACL_MAXPAGES];
3989 struct nfs_setaclargs arg = {
3990 .fh = NFS_FH(inode),
3991 .acl_pages = pages,
3992 .acl_len = buflen,
3993 };
73c403a9 3994 struct nfs_setaclres res;
4b580ee3
BF		 3995 struct rpc_message msg = {
3996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3997 .rpc_argp = &arg,
73c403a9 3998 .rpc_resp = &res,
4b580ee3 3999 };
21f498c2 4000 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4001 int ret, i;
4b580ee3
BF		 4002
4003 if (!nfs4_server_supports_acls(server))
4004 return -EOPNOTSUPP;
21f498c2
TM		 4005 if (npages > ARRAY_SIZE(pages))
4006 return -ERANGE;
e9e3d724
NH		 4007 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4008 if (i < 0)
4009 return i;
57ec14c5 4010 nfs4_inode_return_delegation(inode);
7c513058 4011 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4012
4013 /*
4014 * Free each page after tx, so the only ref left is
4015 * held by the network stack
4016 */
4017 for (; i > 0; i--)
4018 put_page(pages[i-1]);
4019
08a22b39
AK		 4020 /*
4021 * Acl update can result in inode attribute update.
4022 * so mark the attribute cache invalid.
4023 */
4024 spin_lock(&inode->i_lock);
4025 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4026 spin_unlock(&inode->i_lock);
f41f7418
TM		 4027 nfs_access_zap_cache(inode);
4028 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4029 return ret;
4030}
4031
16b4289c
TM		 4032static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4033{
4034 struct nfs4_exception exception = { };
4035 int err;
4036 do {
4037 err = nfs4_handle_exception(NFS_SERVER(inode),
4038 __nfs4_proc_set_acl(inode, buf, buflen),
4039 &exception);
4040 } while (exception.retry);
4041 return err;
4042}
4043
1da177e4 4044static int
aa5190d0 4045nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4046{
aa5190d0
TM		 4047 struct nfs_client *clp = server->nfs_client;
4048
4049 if (task->tk_status >= 0)
1da177e4
LT		 4050 return 0;
4051 switch(task->tk_status) {
a1d0b5ee 4052 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4053 case -NFS4ERR_ADMIN_REVOKED:
4054 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4055 if (state == NULL)
4056 break;
4057 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4058 case -NFS4ERR_OPENMODE:
4059 if (state == NULL)
4060 break;
0400a6b0
TM		 4061 nfs4_schedule_stateid_recovery(server, state);
4062 goto wait_on_recovery;
0ced63d1
TM		 4063 case -NFS4ERR_EXPIRED:
4064 if (state != NULL)
4065 nfs4_schedule_stateid_recovery(server, state);
1da177e4 4066 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4067 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4068 nfs4_schedule_lease_recovery(clp);
4069 goto wait_on_recovery;
4745e315
AA		 4070#if defined(CONFIG_NFS_V4_1)
4071 case -NFS4ERR_BADSESSION:
4072 case -NFS4ERR_BADSLOT:
4073 case -NFS4ERR_BAD_HIGH_SLOT:
4074 case -NFS4ERR_DEADSESSION:
4075 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4076 case -NFS4ERR_SEQ_FALSE_RETRY:
4077 case -NFS4ERR_SEQ_MISORDERED:
4078 dprintk("%s ERROR %d, Reset session\n", __func__,
4079 task->tk_status);
9f594791 4080 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4081 task->tk_status = 0;
4082 return -EAGAIN;
4083#endif /* CONFIG_NFS_V4_1 */
1da177e4 4084 case -NFS4ERR_DELAY:
aa5190d0 4085 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4086 case -NFS4ERR_GRACE:
2c643488 4087 case -EKEYEXPIRED:
1da177e4
LT		 4088 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4089 task->tk_status = 0;
4090 return -EAGAIN;
a8a4ae3a 4091 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4092 case -NFS4ERR_OLD_STATEID:
4093 task->tk_status = 0;
4094 return -EAGAIN;
4095 }
4096 task->tk_status = nfs4_map_errors(task->tk_status);
4097 return 0;
0400a6b0 4098wait_on_recovery:
a2c0b9e2 4099 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4100 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4101 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4102 task->tk_status = 0;
4103 return -EAGAIN;
1da177e4
LT		 4104}
4105
f092075d
CL		 4106static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4107 nfs4_verifier *bootverf)
cd93710e
CL		 4108{
4109 __be32 verf[2];
4110
2c820d9a
CL		 4111 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4112 /* An impossible timestamp guarantees this value
4113 * will never match a generated boot time. */
4114 verf[0] = 0;
4115 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4116 } else {
f092075d
CL		 4117 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4118 verf[0] = (__be32)nn->boot_time.tv_sec;
4119 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4120 }
cd93710e
CL		 4121 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4122}
4123
e984a55a
CL		 4124static unsigned int
4125nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4126 char *buf, size_t len)
4127{
4128 unsigned int result;
4129
4130 rcu_read_lock();
4131 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4132 clp->cl_ipaddr,
4133 rpc_peeraddr2str(clp->cl_rpcclient,
4134 RPC_DISPLAY_ADDR),
4135 rpc_peeraddr2str(clp->cl_rpcclient,
4136 RPC_DISPLAY_PROTO));
4137 rcu_read_unlock();
4138 return result;
4139}
4140
4141static unsigned int
4142nfs4_init_uniform_client_string(const struct nfs_client *clp,
4143 char *buf, size_t len)
4144{
6f2ea7f2
CL		 4145 char *nodename = clp->cl_rpcclient->cl_nodename;
4146
4147 if (nfs4_client_id_uniquifier[0] != '\0')
4148 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4149 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4150 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4151 nodename);
e984a55a
CL		 4152}
4153
6bbb4ae8
CL		 4154/**
4155 * nfs4_proc_setclientid - Negotiate client ID
4156 * @clp: state data structure
4157 * @program: RPC program for NFSv4 callback service
4158 * @port: IP port number for NFS4 callback service
4159 * @cred: RPC credential to use for this call
4160 * @res: where to place the result
4161 *
4162 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4163 */
bb8b27e5
TM		 4164int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4165 unsigned short port, struct rpc_cred *cred,
4166 struct nfs4_setclientid_res *res)
1da177e4
LT		 4167{
4168 nfs4_verifier sc_verifier;
4169 struct nfs4_setclientid setclientid = {
4170 .sc_verifier = &sc_verifier,
4171 .sc_prog = program,
f4eecd5d 4172 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4173 };
4174 struct rpc_message msg = {
4175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4176 .rpc_argp = &setclientid,
bb8b27e5 4177 .rpc_resp = res,
286d7d6a 4178 .rpc_cred = cred,
1da177e4 4179 };
6bbb4ae8 4180 int status;
1da177e4 4181
de734831 4182 /* nfs_client_id4 */
f092075d 4183 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4184 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4185 setclientid.sc_name_len =
4186 nfs4_init_uniform_client_string(clp,
4187 setclientid.sc_name,
4188 sizeof(setclientid.sc_name));
4189 else
4190 setclientid.sc_name_len =
4191 nfs4_init_nonuniform_client_string(clp,
4192 setclientid.sc_name,
4193 sizeof(setclientid.sc_name));
de734831 4194 /* cb_client4 */
e984a55a 4195 rcu_read_lock();
de734831 4196 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4197 sizeof(setclientid.sc_netid),
4198 rpc_peeraddr2str(clp->cl_rpcclient,
4199 RPC_DISPLAY_NETID));
de734831
CL		 4200 rcu_read_unlock();
4201 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4202 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4203 clp->cl_ipaddr, port >> 8, port & 255);
4204
6bbb4ae8
CL		 4205 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4206 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4207 setclientid.sc_name_len, setclientid.sc_name);
4208 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4209 dprintk("NFS reply setclientid: %d\n", status);
4210 return status;
1da177e4
LT		 4211}
4212
6bbb4ae8
CL		 4213/**
4214 * nfs4_proc_setclientid_confirm - Confirm client ID
4215 * @clp: state data structure
4216 * @res: result of a previous SETCLIENTID
4217 * @cred: RPC credential to use for this call
4218 *
4219 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4220 */
fd954ae1 4221int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4222 struct nfs4_setclientid_res *arg,
4223 struct rpc_cred *cred)
1da177e4
LT		 4224{
4225 struct nfs_fsinfo fsinfo;
4226 struct rpc_message msg = {
4227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4228 .rpc_argp = arg,
1da177e4 4229 .rpc_resp = &fsinfo,
286d7d6a 4230 .rpc_cred = cred,
1da177e4
LT		 4231 };
4232 unsigned long now;
4233 int status;
4234
6bbb4ae8
CL		 4235 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4236 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4237 clp->cl_clientid);
1da177e4 4238 now = jiffies;
1bd714f2 4239 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4240 if (status == 0) {
4241 spin_lock(&clp->cl_lock);
4242 clp->cl_lease_time = fsinfo.lease_time * HZ;
4243 clp->cl_last_renewal = now;
4244 spin_unlock(&clp->cl_lock);
4245 }
6bbb4ae8 4246 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4247 return status;
4248}
4249
fe650407
TM		 4250struct nfs4_delegreturndata {
4251 struct nfs4_delegreturnargs args;
fa178f29 4252 struct nfs4_delegreturnres res;
fe650407
TM		 4253 struct nfs_fh fh;
4254 nfs4_stateid stateid;
26e976a8 4255 unsigned long timestamp;
fa178f29 4256 struct nfs_fattr fattr;
fe650407
TM		 4257 int rpc_status;
4258};
4259
fe650407
TM		 4260static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4261{
4262 struct nfs4_delegreturndata *data = calldata;
938e1010 4263
14516c3a
TM		 4264 if (!nfs4_sequence_done(task, &data->res.seq_res))
4265 return;
938e1010 4266
79708861
RL		 4267 switch (task->tk_status) {
4268 case -NFS4ERR_STALE_STATEID:
4269 case -NFS4ERR_EXPIRED:
4270 case 0:
fa178f29 4271 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4272 break;
4273 default:
4274 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4275 -EAGAIN) {
d00c5d43 4276 rpc_restart_call_prepare(task);
79708861
RL		 4277 return;
4278 }
4279 }
4280 data->rpc_status = task->tk_status;
fe650407
TM		 4281}
4282
4283static void nfs4_delegreturn_release(void *calldata)
4284{
fe650407
TM		 4285 kfree(calldata);
4286}
4287
938e1010
AA		 4288#if defined(CONFIG_NFS_V4_1)
4289static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4290{
4291 struct nfs4_delegreturndata *d_data;
4292
4293 d_data = (struct nfs4_delegreturndata *)data;
4294
035168ab 4295 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4296 &d_data->args.seq_args,
9d12b216 4297 &d_data->res.seq_res, task))
938e1010
AA		 4298 return;
4299 rpc_call_start(task);
4300}
4301#endif /* CONFIG_NFS_V4_1 */
4302
c8d149f3 4303static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4304#if defined(CONFIG_NFS_V4_1)
4305 .rpc_call_prepare = nfs4_delegreturn_prepare,
4306#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4307 .rpc_call_done = nfs4_delegreturn_done,
4308 .rpc_release = nfs4_delegreturn_release,
4309};
4310
e6f81075 4311static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4312{
4313 struct nfs4_delegreturndata *data;
fa178f29 4314 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4315 struct rpc_task *task;
5138fde0
TM		 4316 struct rpc_message msg = {
4317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4318 .rpc_cred = cred,
4319 };
c970aa85
TM		 4320 struct rpc_task_setup task_setup_data = {
4321 .rpc_client = server->client,
5138fde0 4322 .rpc_message = &msg,
c970aa85
TM		 4323 .callback_ops = &nfs4_delegreturn_ops,
4324 .flags = RPC_TASK_ASYNC,
4325 };
e6f81075 4326 int status = 0;
fe650407 4327
8535b2be 4328 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4329 if (data == NULL)
4330 return -ENOMEM;
9d12b216 4331 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4332 data->args.fhandle = &data->fh;
4333 data->args.stateid = &data->stateid;
9e907fec 4334 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4335 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4336 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4337 data->res.fattr = &data->fattr;
4338 data->res.server = server;
5138fde0 4339 nfs_fattr_init(data->res.fattr);
26e976a8 4340 data->timestamp = jiffies;
fe650407
TM		 4341 data->rpc_status = 0;
4342
c970aa85 4343 task_setup_data.callback_data = data;
1174dd1f
TM		 4344 msg.rpc_argp = &data->args;
4345 msg.rpc_resp = &data->res;
c970aa85 4346 task = rpc_run_task(&task_setup_data);
7a1218a2 4347 if (IS_ERR(task))
fe650407 4348 return PTR_ERR(task);
e6f81075
TM		 4349 if (!issync)
4350 goto out;
fe650407 4351 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4352 if (status != 0)
4353 goto out;
4354 status = data->rpc_status;
e144cbcc
TM		 4355 if (status == 0)
4356 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4357 else
4358 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4359out:
e6b3c4db 4360 rpc_put_task(task);
fe650407 4361 return status;
1da177e4
LT		 4362}
4363
e6f81075 4364int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4365{
4366 struct nfs_server *server = NFS_SERVER(inode);
4367 struct nfs4_exception exception = { };
4368 int err;
4369 do {
e6f81075 4370 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4371 switch (err) {
4372 case -NFS4ERR_STALE_STATEID:
4373 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4374 case 0:
4375 return 0;
4376 }
4377 err = nfs4_handle_exception(server, err, &exception);
4378 } while (exception.retry);
4379 return err;
4380}
4381
4382#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4383#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4384
4385/*
4386 * sleep, with exponential backoff, and retry the LOCK operation.
4387 */
4388static unsigned long
4389nfs4_set_lock_task_retry(unsigned long timeout)
4390{
d310310c 4391 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4392 timeout <<= 1;
4393 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4394 return NFS4_LOCK_MAXTIMEOUT;
4395 return timeout;
4396}
4397
1da177e4
LT		 4398static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4399{
4400 struct inode *inode = state->inode;
4401 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4402 struct nfs_client *clp = server->nfs_client;
911d1aaf 4403 struct nfs_lockt_args arg = {
1da177e4 4404 .fh = NFS_FH(inode),
911d1aaf 4405 .fl = request,
1da177e4 4406 };
911d1aaf
TM		 4407 struct nfs_lockt_res res = {
4408 .denied = request,
1da177e4
LT		 4409 };
4410 struct rpc_message msg = {
4411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4412 .rpc_argp = &arg,
4413 .rpc_resp = &res,
4414 .rpc_cred = state->owner->so_cred,
4415 };
1da177e4
LT		 4416 struct nfs4_lock_state *lsp;
4417 int status;
4418
911d1aaf 4419 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4420 status = nfs4_set_lock_state(state, request);
4421 if (status != 0)
4422 goto out;
4423 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4424 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4425 arg.lock_owner.s_dev = server->s_dev;
7c513058 4426 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4427 switch (status) {
4428 case 0:
4429 request->fl_type = F_UNLCK;
4430 break;
4431 case -NFS4ERR_DENIED:
4432 status = 0;
1da177e4 4433 }
70cc6487 4434 request->fl_ops->fl_release_private(request);
8d0a8a9d 4435out:
1da177e4
LT		 4436 return status;
4437}
4438
4439static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4440{
4441 struct nfs4_exception exception = { };
4442 int err;
4443
4444 do {
4445 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4446 _nfs4_proc_getlk(state, cmd, request),
4447 &exception);
4448 } while (exception.retry);
4449 return err;
4450}
4451
4452static int do_vfs_lock(struct file *file, struct file_lock *fl)
4453{
4454 int res = 0;
4455 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4456 case FL_POSIX:
4457 res = posix_lock_file_wait(file, fl);
4458 break;
4459 case FL_FLOCK:
4460 res = flock_lock_file_wait(file, fl);
4461 break;
4462 default:
4463 BUG();
4464 }
1da177e4
LT		 4465 return res;
4466}
4467
faf5f49c 4468struct nfs4_unlockdata {
911d1aaf
TM		 4469 struct nfs_locku_args arg;
4470 struct nfs_locku_res res;
faf5f49c
TM		 4471 struct nfs4_lock_state *lsp;
4472 struct nfs_open_context *ctx;
911d1aaf
TM		 4473 struct file_lock fl;
4474 const struct nfs_server *server;
26e976a8 4475 unsigned long timestamp;
faf5f49c
TM		 4476};
4477
911d1aaf
TM		 4478static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4479 struct nfs_open_context *ctx,
4480 struct nfs4_lock_state *lsp,
4481 struct nfs_seqid *seqid)
4482{
4483 struct nfs4_unlockdata *p;
4484 struct inode *inode = lsp->ls_state->inode;
4485
8535b2be 4486 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4487 if (p == NULL)
4488 return NULL;
4489 p->arg.fh = NFS_FH(inode);
4490 p->arg.fl = &p->fl;
4491 p->arg.seqid = seqid;
c1d51931 4492 p->res.seqid = seqid;
911d1aaf
TM		 4493 p->arg.stateid = &lsp->ls_stateid;
4494 p->lsp = lsp;
4495 atomic_inc(&lsp->ls_count);
4496 /* Ensure we don't close file until we're done freeing locks! */
4497 p->ctx = get_nfs_open_context(ctx);
4498 memcpy(&p->fl, fl, sizeof(p->fl));
4499 p->server = NFS_SERVER(inode);
4500 return p;
4501}
4502
06f814a3 4503static void nfs4_locku_release_calldata(void *data)
faf5f49c 4504{
963d8fe5 4505 struct nfs4_unlockdata *calldata = data;
911d1aaf 4506 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4507 nfs4_put_lock_state(calldata->lsp);
4508 put_nfs_open_context(calldata->ctx);
4509 kfree(calldata);
faf5f49c
TM		 4510}
4511
963d8fe5 4512static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4513{
963d8fe5 4514 struct nfs4_unlockdata *calldata = data;
faf5f49c 4515
14516c3a
TM		 4516 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4517 return;
faf5f49c
TM		 4518 switch (task->tk_status) {
4519 case 0:
f597c537
TM		 4520 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4521 &calldata->res.stateid);
26e976a8 4522 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4523 break;
9e33bed5
TM		 4524 case -NFS4ERR_BAD_STATEID:
4525 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4526 case -NFS4ERR_STALE_STATEID:
4527 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4528 break;
4529 default:
9e33bed5 4530 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4531 rpc_restart_call_prepare(task);
faf5f49c 4532 }
2b1bc308 4533 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4534}
4535
4ce70ada 4536static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4537{
4ce70ada 4538 struct nfs4_unlockdata *calldata = data;
faf5f49c 4539
911d1aaf 4540 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4541 return;
795a88c9 4542 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4543 /* Note: exit _without_ running nfs4_locku_done */
4544 task->tk_action = NULL;
faf5f49c
TM		 4545 return;
4546 }
26e976a8 4547 calldata->timestamp = jiffies;
035168ab 4548 if (nfs4_setup_sequence(calldata->server,
a893693c 4549 &calldata->arg.seq_args,
2240a9e2
TM		 4550 &calldata->res.seq_res,
4551 task) != 0)
4552 nfs_release_seqid(calldata->arg.seqid);
4553 else
4554 rpc_call_start(task);
faf5f49c
TM		 4555}
4556
963d8fe5 4557static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4558 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4559 .rpc_call_done = nfs4_locku_done,
06f814a3 4560 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4561};
4562
a5d16a4d
TM		 4563static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4564 struct nfs_open_context *ctx,
4565 struct nfs4_lock_state *lsp,
4566 struct nfs_seqid *seqid)
4567{
4568 struct nfs4_unlockdata *data;
5138fde0
TM		 4569 struct rpc_message msg = {
4570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4571 .rpc_cred = ctx->cred,
4572 };
c970aa85
TM		 4573 struct rpc_task_setup task_setup_data = {
4574 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4575 .rpc_message = &msg,
c970aa85 4576 .callback_ops = &nfs4_locku_ops,
101070ca 4577 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4578 .flags = RPC_TASK_ASYNC,
4579 };
a5d16a4d 4580
137d6aca
FF		 4581 /* Ensure this is an unlock - when canceling a lock, the
4582 * canceled lock is passed in, and it won't be an unlock.
4583 */
4584 fl->fl_type = F_UNLCK;
4585
a5d16a4d
TM		 4586 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4587 if (data == NULL) {
4588 nfs_free_seqid(seqid);
4589 return ERR_PTR(-ENOMEM);
4590 }
4591
9d12b216 4592 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4593 msg.rpc_argp = &data->arg;
4594 msg.rpc_resp = &data->res;
c970aa85
TM		 4595 task_setup_data.callback_data = data;
4596 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4597}
4598
faf5f49c
TM		 4599static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4600{
19e03c57 4601 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4602 struct nfs_seqid *seqid;
1da177e4 4603 struct nfs4_lock_state *lsp;
06f814a3
TM		 4604 struct rpc_task *task;
4605 int status = 0;
536ff0f8 4606 unsigned char fl_flags = request->fl_flags;
faf5f49c 4607
8d0a8a9d 4608 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4609 /* Unlock _before_ we do the RPC call */
4610 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4611 down_read(&nfsi->rwsem);
4612 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4613 up_read(&nfsi->rwsem);
9b073574 4614 goto out;
19e03c57
TM		 4615 }
4616 up_read(&nfsi->rwsem);
8d0a8a9d 4617 if (status != 0)
9b073574
TM		 4618 goto out;
4619 /* Is this a delegated lock? */
4620 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4621 goto out;
8d0a8a9d 4622 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4623 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4624 status = -ENOMEM;
911d1aaf 4625 if (seqid == NULL)
9b073574 4626 goto out;
cd3758e3 4627 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4628 status = PTR_ERR(task);
4629 if (IS_ERR(task))
9b073574 4630 goto out;
a5d16a4d 4631 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4632 rpc_put_task(task);
9b073574 4633out:
536ff0f8 4634 request->fl_flags = fl_flags;
1da177e4
LT		 4635 return status;
4636}
4637
a5d16a4d
TM		 4638struct nfs4_lockdata {
4639 struct nfs_lock_args arg;
4640 struct nfs_lock_res res;
4641 struct nfs4_lock_state *lsp;
4642 struct nfs_open_context *ctx;
4643 struct file_lock fl;
26e976a8 4644 unsigned long timestamp;
a5d16a4d
TM		 4645 int rpc_status;
4646 int cancelled;
66179efe 4647 struct nfs_server *server;
a5d16a4d
TM		 4648};
4649
4650static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4651 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4652 gfp_t gfp_mask)
1da177e4 4653{
a5d16a4d
TM		 4654 struct nfs4_lockdata *p;
4655 struct inode *inode = lsp->ls_state->inode;
1da177e4 4656 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4657
8535b2be 4658 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4659 if (p == NULL)
4660 return NULL;
4661
4662 p->arg.fh = NFS_FH(inode);
4663 p->arg.fl = &p->fl;
8535b2be 4664 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4665 if (p->arg.open_seqid == NULL)
4666 goto out_free;
8535b2be 4667 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4668 if (p->arg.lock_seqid == NULL)
2f74c0a0 4669 goto out_free_seqid;
a5d16a4d 4670 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4671 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4672 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4673 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4674 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4675 p->lsp = lsp;
66179efe 4676 p->server = server;
a5d16a4d
TM		 4677 atomic_inc(&lsp->ls_count);
4678 p->ctx = get_nfs_open_context(ctx);
4679 memcpy(&p->fl, fl, sizeof(p->fl));
4680 return p;
2f74c0a0
TM		 4681out_free_seqid:
4682 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4683out_free:
4684 kfree(p);
4685 return NULL;
4686}
4687
4688static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4689{
4690 struct nfs4_lockdata *data = calldata;
4691 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4692
3110ff80 4693 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4694 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4695 return;
a5d16a4d
TM		 4696 /* Do we need to do an open_to_lock_owner? */
4697 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970 4698 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
2240a9e2 4699 goto out_release_lock_seqid;
a5d16a4d
TM		 4700 data->arg.open_stateid = &state->stateid;
4701 data->arg.new_lock_owner = 1;
c1d51931 4702 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4703 } else
4704 data->arg.new_lock_owner = 0;
26e976a8 4705 data->timestamp = jiffies;
035168ab
TM		 4706 if (nfs4_setup_sequence(data->server,
4707 &data->arg.seq_args,
2240a9e2
TM		 4708 &data->res.seq_res,
4709 task) == 0) {
4710 rpc_call_start(task);
66179efe 4711 return;
2240a9e2
TM		 4712 }
4713 nfs_release_seqid(data->arg.open_seqid);
4714out_release_lock_seqid:
4715 nfs_release_seqid(data->arg.lock_seqid);
4716 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
a5d16a4d
TM		 4717}
4718
b257957e
AB		 4719static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4720{
4721 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4722 nfs4_lock_prepare(task, calldata);
4723}
4724
a5d16a4d
TM		 4725static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4726{
4727 struct nfs4_lockdata *data = calldata;
4728
3110ff80 4729 dprintk("%s: begin!\n", __func__);
a5d16a4d 4730
14516c3a
TM		 4731 if (!nfs4_sequence_done(task, &data->res.seq_res))
4732 return;
66179efe 4733
a5d16a4d 4734 data->rpc_status = task->tk_status;
a5d16a4d 4735 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4736 if (data->rpc_status == 0)
4737 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4738 else
4739 goto out;
4740 }
4741 if (data->rpc_status == 0) {
f597c537 4742 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4743 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4744 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4745 }
a5d16a4d 4746out:
3110ff80 4747 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4748}
4749
4750static void nfs4_lock_release(void *calldata)
4751{
4752 struct nfs4_lockdata *data = calldata;
4753
3110ff80 4754 dprintk("%s: begin!\n", __func__);
2f74c0a0 4755 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4756 if (data->cancelled != 0) {
4757 struct rpc_task *task;
4758 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4759 data->arg.lock_seqid);
4760 if (!IS_ERR(task))
bf294b41 4761 rpc_put_task_async(task);
3110ff80 4762 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4763 } else
4764 nfs_free_seqid(data->arg.lock_seqid);
4765 nfs4_put_lock_state(data->lsp);
4766 put_nfs_open_context(data->ctx);
4767 kfree(data);
3110ff80 4768 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4769}
4770
4771static const struct rpc_call_ops nfs4_lock_ops = {
4772 .rpc_call_prepare = nfs4_lock_prepare,
4773 .rpc_call_done = nfs4_lock_done,
4774 .rpc_release = nfs4_lock_release,
4775};
4776
b257957e
AB		 4777static const struct rpc_call_ops nfs4_recover_lock_ops = {
4778 .rpc_call_prepare = nfs4_recover_lock_prepare,
4779 .rpc_call_done = nfs4_lock_done,
4780 .rpc_release = nfs4_lock_release,
4781};
4782
2bee72a6
TM		 4783static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4784{
2bee72a6
TM		 4785 switch (error) {
4786 case -NFS4ERR_ADMIN_REVOKED:
4787 case -NFS4ERR_BAD_STATEID:
ecac799a 4788 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4789 if (new_lock_owner != 0 ||
795a88c9 4790 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4791 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4792 break;
4793 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4794 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4795 case -NFS4ERR_EXPIRED:
4796 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4797 };
4798}
4799
afe6c27c 4800static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4801{
4802 struct nfs4_lockdata *data;
4803 struct rpc_task *task;
5138fde0
TM		 4804 struct rpc_message msg = {
4805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4806 .rpc_cred = state->owner->so_cred,
4807 };
c970aa85
TM		 4808 struct rpc_task_setup task_setup_data = {
4809 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4810 .rpc_message = &msg,
c970aa85 4811 .callback_ops = &nfs4_lock_ops,
101070ca 4812 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4813 .flags = RPC_TASK_ASYNC,
4814 };
a5d16a4d
TM		 4815 int ret;
4816
3110ff80 4817 dprintk("%s: begin!\n", __func__);
cd3758e3 4818 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4819 fl->fl_u.nfs4_fl.owner,
4820 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4821 if (data == NULL)
4822 return -ENOMEM;
4823 if (IS_SETLKW(cmd))
4824 data->arg.block = 1;
b257957e
AB		 4825 if (recovery_type > NFS_LOCK_NEW) {
4826 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4827 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4828 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4829 }
9d12b216 4830 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4831 msg.rpc_argp = &data->arg;
4832 msg.rpc_resp = &data->res;
c970aa85
TM		 4833 task_setup_data.callback_data = data;
4834 task = rpc_run_task(&task_setup_data);
7a1218a2 4835 if (IS_ERR(task))
a5d16a4d 4836 return PTR_ERR(task);
a5d16a4d
TM		 4837 ret = nfs4_wait_for_completion_rpc_task(task);
4838 if (ret == 0) {
4839 ret = data->rpc_status;
2bee72a6
TM		 4840 if (ret)
4841 nfs4_handle_setlk_error(data->server, data->lsp,
4842 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4843 } else
4844 data->cancelled = 1;
e6b3c4db 4845 rpc_put_task(task);
3110ff80 4846 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4847 return ret;
1da177e4
LT		 4848}
4849
4850static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4851{
202b50dc 4852 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4853 struct nfs4_exception exception = {
4854 .inode = state->inode,
4855 };
202b50dc
TM		 4856 int err;
4857
4858 do {
42a2d13e
TM		 4859 /* Cache the lock if possible... */
4860 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4861 return 0;
afe6c27c 4862 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4863 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4864 break;
4865 nfs4_handle_exception(server, err, &exception);
4866 } while (exception.retry);
4867 return err;
1da177e4
LT		 4868}
4869
4870static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4871{
202b50dc 4872 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4873 struct nfs4_exception exception = {
4874 .inode = state->inode,
4875 };
202b50dc
TM		 4876 int err;
4877
6bfc93ef
TM		 4878 err = nfs4_set_lock_state(state, request);
4879 if (err != 0)
4880 return err;
202b50dc 4881 do {
42a2d13e
TM		 4882 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4883 return 0;
afe6c27c 4884 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4885 switch (err) {
4886 default:
4887 goto out;
4888 case -NFS4ERR_GRACE:
4889 case -NFS4ERR_DELAY:
4890 nfs4_handle_exception(server, err, &exception);
4891 err = 0;
4892 }
202b50dc 4893 } while (exception.retry);
a9ed2e25 4894out:
202b50dc 4895 return err;
1da177e4
LT		 4896}
4897
f062eb6c 4898#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4899/**
4900 * nfs41_check_expired_locks - possibly free a lock stateid
4901 *
4902 * @state: NFSv4 state for an inode
4903 *
4904 * Returns NFS_OK if recovery for this stateid is now finished.
4905 * Otherwise a negative NFS4ERR value is returned.
4906 */
b01dd1d8 4907static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4908{
eb64cf96 4909 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4910 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4911 struct nfs_server *server = NFS_SERVER(state->inode);
4912
b01dd1d8 4913 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4914 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4915 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4916 if (status != NFS_OK) {
3e60ffdd
CL		 4917 /* Free the stateid unless the server
4918 * informs us the stateid is unrecognized. */
89af2739
CL		 4919 if (status != -NFS4ERR_BAD_STATEID)
4920 nfs41_free_stateid(server,
4921 &lsp->ls_stateid);
795a88c9 4922 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4923 ret = status;
4924 }
4925 }
4926 };
4927
4928 return ret;
4929}
4930
4931static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4932{
4933 int status = NFS_OK;
4934
4935 if (test_bit(LK_STATE_IN_USE, &state->flags))
4936 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4937 if (status != NFS_OK)
4938 status = nfs4_lock_expired(state, request);
4939 return status;
f062eb6c
BS		 4940}
4941#endif
4942
1da177e4
LT		 4943static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4944{
19e03c57 4945 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4946 unsigned char fl_flags = request->fl_flags;
8e469ebd 4947 int status = -ENOLCK;
1da177e4 4948
8e469ebd
TM		 4949 if ((fl_flags & FL_POSIX) &&
4950 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4951 goto out;
6bfc93ef 4952 /* Is this a delegated open? */
6bfc93ef
TM		 4953 status = nfs4_set_lock_state(state, request);
4954 if (status != 0)
4955 goto out;
01c3b861
TM		 4956 request->fl_flags |= FL_ACCESS;
4957 status = do_vfs_lock(request->fl_file, request);
4958 if (status < 0)
4959 goto out;
19e03c57 4960 down_read(&nfsi->rwsem);
01c3b861 4961 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4962 /* Yes: cache locks! */
01c3b861 4963 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4964 request->fl_flags = fl_flags & ~FL_SLEEP;
4965 status = do_vfs_lock(request->fl_file, request);
4966 goto out_unlock;
01c3b861 4967 }
afe6c27c 4968 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4969 if (status != 0)
01c3b861 4970 goto out_unlock;
6bfc93ef 4971 /* Note: we always want to sleep here! */
01c3b861 4972 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4973 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4974 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4975 "manager!\n", __func__);
01c3b861 4976out_unlock:
19e03c57 4977 up_read(&nfsi->rwsem);
01c3b861
TM		 4978out:
4979 request->fl_flags = fl_flags;
1da177e4
LT		 4980 return status;
4981}
4982
4983static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4984{
a1d0b5ee
TM		 4985 struct nfs4_exception exception = {
4986 .state = state,
05ffe24f 4987 .inode = state->inode,
a1d0b5ee 4988 };
1da177e4
LT		 4989 int err;
4990
4991 do {
965b5d67
TM		 4992 err = _nfs4_proc_setlk(state, cmd, request);
4993 if (err == -NFS4ERR_DENIED)
4994 err = -EAGAIN;
1da177e4 4995 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4996 err, &exception);
1da177e4
LT		 4997 } while (exception.retry);
4998 return err;
4999}
5000
5001static int
5002nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5003{
5004 struct nfs_open_context *ctx;
5005 struct nfs4_state *state;
5006 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5007 int status;
5008
5009 /* verify open state */
cd3758e3 5010 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5011 state = ctx->state;
5012
5013 if (request->fl_start < 0 || request->fl_end < 0)
5014 return -EINVAL;
5015
d953126a
TM		 5016 if (IS_GETLK(cmd)) {
5017 if (state != NULL)
5018 return nfs4_proc_getlk(state, F_GETLK, request);
5019 return 0;
5020 }
1da177e4
LT		 5021
5022 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5023 return -EINVAL;
5024
d953126a
TM		 5025 if (request->fl_type == F_UNLCK) {
5026 if (state != NULL)
5027 return nfs4_proc_unlck(state, cmd, request);
5028 return 0;
5029 }
1da177e4 5030
d953126a
TM		 5031 if (state == NULL)
5032 return -ENOLCK;
55725513
TM		 5033 /*
5034 * Don't rely on the VFS having checked the file open mode,
5035 * since it won't do this for flock() locks.
5036 */
f44106e2 5037 switch (request->fl_type) {
55725513
TM		 5038 case F_RDLCK:
5039 if (!(filp->f_mode & FMODE_READ))
5040 return -EBADF;
5041 break;
5042 case F_WRLCK:
5043 if (!(filp->f_mode & FMODE_WRITE))
5044 return -EBADF;
5045 }
5046
1da177e4
LT		 5047 do {
5048 status = nfs4_proc_setlk(state, cmd, request);
5049 if ((status != -EAGAIN) || IS_SETLK(cmd))
5050 break;
5051 timeout = nfs4_set_lock_task_retry(timeout);
5052 status = -ERESTARTSYS;
5053 if (signalled())
5054 break;
5055 } while(status < 0);
1da177e4
LT		 5056 return status;
5057}
5058
888e694c
TM		 5059int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5060{
5061 struct nfs_server *server = NFS_SERVER(state->inode);
5062 struct nfs4_exception exception = { };
5063 int err;
5064
5065 err = nfs4_set_lock_state(state, fl);
5066 if (err != 0)
5067 goto out;
5068 do {
afe6c27c 5069 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5070 switch (err) {
5071 default:
a030889a
WAA		 5072 printk(KERN_ERR "NFS: %s: unhandled error "
5073 "%d.\n", __func__, err);
d5122201 5074 case 0:
965b5d67 5075 case -ESTALE:
d5122201
TM		 5076 goto out;
5077 case -NFS4ERR_EXPIRED:
0ced63d1 5078 nfs4_schedule_stateid_recovery(server, state);
d5122201 5079 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5080 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 5081 nfs4_schedule_lease_recovery(server->nfs_client);
5082 goto out;
74e7bb73
RL		 5083 case -NFS4ERR_BADSESSION:
5084 case -NFS4ERR_BADSLOT:
5085 case -NFS4ERR_BAD_HIGH_SLOT:
5086 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5087 case -NFS4ERR_DEADSESSION:
9f594791 5088 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 5089 goto out;
965b5d67
TM		 5090 case -ERESTARTSYS:
5091 /*
5092 * The show must go on: exit, but mark the
5093 * stateid as needing recovery.
5094 */
a1d0b5ee 5095 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5096 case -NFS4ERR_ADMIN_REVOKED:
5097 case -NFS4ERR_BAD_STATEID:
5098 case -NFS4ERR_OPENMODE:
0400a6b0 5099 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5100 err = 0;
5101 goto out;
168667c4
TM		 5102 case -EKEYEXPIRED:
5103 /*
5104 * User RPCSEC_GSS context has expired.
5105 * We cannot recover this stateid now, so
5106 * skip it and allow recovery thread to
5107 * proceed.
5108 */
5109 err = 0;
5110 goto out;
965b5d67
TM		 5111 case -ENOMEM:
5112 case -NFS4ERR_DENIED:
5113 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5114 err = 0;
5115 goto out;
d5122201
TM		 5116 case -NFS4ERR_DELAY:
5117 break;
5118 }
888e694c
TM		 5119 err = nfs4_handle_exception(server, err, &exception);
5120 } while (exception.retry);
5121out:
5122 return err;
5123}
6b3b5496 5124
cf470c3e
TM		 5125struct nfs_release_lockowner_data {
5126 struct nfs4_lock_state *lsp;
5ae67c4f 5127 struct nfs_server *server;
cf470c3e
TM		 5128 struct nfs_release_lockowner_args args;
5129};
5130
d3c7b7cc
TM		 5131static void nfs4_release_lockowner_release(void *calldata)
5132{
cf470c3e 5133 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5134 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5135 kfree(calldata);
5136}
5137
17280175 5138static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5139 .rpc_release = nfs4_release_lockowner_release,
5140};
5141
cf470c3e 5142int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5143{
5144 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5145 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5146 struct rpc_message msg = {
5147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5148 };
5149
5150 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5151 return -EINVAL;
5152 data = kmalloc(sizeof(*data), GFP_NOFS);
5153 if (!data)
5154 return -ENOMEM;
5155 data->lsp = lsp;
5ae67c4f 5156 data->server = server;
cf470c3e
TM		 5157 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5158 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5159 data->args.lock_owner.s_dev = server->s_dev;
5160 msg.rpc_argp = &data->args;
5161 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5162 return 0;
d3c7b7cc
TM		 5163}
5164
aa1870af
BF		 5165#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5166
64c2ce8b
AK		 5167static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5168 const void *buf, size_t buflen,
5169 int flags, int type)
6b3b5496 5170{
64c2ce8b
AK		 5171 if (strcmp(key, "") != 0)
5172 return -EINVAL;
4b580ee3 5173
64c2ce8b 5174 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5175}
5176
64c2ce8b
AK		 5177static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5178 void *buf, size_t buflen, int type)
6b3b5496 5179{
64c2ce8b
AK		 5180 if (strcmp(key, "") != 0)
5181 return -EINVAL;
aa1870af 5182
64c2ce8b 5183 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5184}
5185
64c2ce8b
AK		 5186static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5187 size_t list_len, const char *name,
5188 size_t name_len, int type)
6b3b5496 5189{
64c2ce8b 5190 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5191
096455a2
BF		 5192 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5193 return 0;
64c2ce8b
AK		 5194
5195 if (list && len <= list_len)
5196 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5197 return len;
6b3b5496
BF		 5198}
5199
533eb461
AA		 5200/*
5201 * nfs_fhget will use either the mounted_on_fileid or the fileid
5202 */
69aaaae1
TM		 5203static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5204{
533eb461
AA		 5205 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5206 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5207 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5208 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5209 return;
5210
5211 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5212 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5213 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5214 fattr->nlink = 2;
5215}
5216
f05d147f
BS		 5217static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5218 const struct qstr *name,
5219 struct nfs4_fs_locations *fs_locations,
5220 struct page *page)
683b57b4
TM		 5221{
5222 struct nfs_server *server = NFS_SERVER(dir);
5223 u32 bitmask[2] = {
361e624f 5224 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5225 };
5226 struct nfs4_fs_locations_arg args = {
5227 .dir_fh = NFS_FH(dir),
c228fd3a 5228 .name = name,
683b57b4
TM		 5229 .page = page,
5230 .bitmask = bitmask,
5231 };
22958463
BH		 5232 struct nfs4_fs_locations_res res = {
5233 .fs_locations = fs_locations,
5234 };
683b57b4
TM		 5235 struct rpc_message msg = {
5236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5237 .rpc_argp = &args,
22958463 5238 .rpc_resp = &res,
683b57b4
TM		 5239 };
5240 int status;
5241
3110ff80 5242 dprintk("%s: start\n", __func__);
533eb461
AA		 5243
5244 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5245 * is not supported */
5246 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5247 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5248 else
5249 bitmask[0] |= FATTR4_WORD0_FILEID;
5250
c228fd3a 5251 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5252 fs_locations->server = server;
830b8e33 5253 fs_locations->nlocations = 0;
f05d147f 5254 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5255 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5256 return status;
5257}
5258
f05d147f
BS		 5259int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5260 const struct qstr *name,
5261 struct nfs4_fs_locations *fs_locations,
5262 struct page *page)
db0a9593
BS		 5263{
5264 struct nfs4_exception exception = { };
5265 int err;
5266 do {
5267 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5268 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5269 &exception);
5270 } while (exception.retry);
5271 return err;
5272}
5273
5a5ea0d4
BS		 5274static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5275{
5276 int status;
5277 struct nfs4_secinfo_arg args = {
5278 .dir_fh = NFS_FH(dir),
5279 .name = name,
5280 };
5281 struct nfs4_secinfo_res res = {
5282 .flavors = flavors,
5283 };
5284 struct rpc_message msg = {
5285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5286 .rpc_argp = &args,
5287 .rpc_resp = &res,
5288 };
5289
5290 dprintk("NFS call secinfo %s\n", name->name);
5291 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5292 dprintk("NFS reply secinfo: %d\n", status);
5293 return status;
5294}
5295
72de53ec
BS		 5296int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5297 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5298{
5299 struct nfs4_exception exception = { };
5300 int err;
5301 do {
5302 err = nfs4_handle_exception(NFS_SERVER(dir),
5303 _nfs4_proc_secinfo(dir, name, flavors),
5304 &exception);
5305 } while (exception.retry);
5306 return err;
5307}
5308
557134a3 5309#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5310/*
5311 * Check the exchange flags returned by the server for invalid flags, having
5312 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5313 * DS flags set.
5314 */
5315static int nfs4_check_cl_exchange_flags(u32 flags)
5316{
5317 if (flags & ~EXCHGID4_FLAG_MASK_R)
5318 goto out_inval;
5319 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5320 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5321 goto out_inval;
5322 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5323 goto out_inval;
5324 return NFS_OK;
5325out_inval:
5326 return -NFS4ERR_INVAL;
5327}
5328
78fe0f41 5329static bool
79d4e1f0
CL		 5330nfs41_same_server_scope(struct nfs41_server_scope *a,
5331 struct nfs41_server_scope *b)
78fe0f41
WAA		 5332{
5333 if (a->server_scope_sz == b->server_scope_sz &&
5334 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5335 return true;
5336
5337 return false;
5338}
5339
7c44f1ae
WAA		 5340/*
5341 * nfs4_proc_bind_conn_to_session()
5342 *
5343 * The 4.1 client currently uses the same TCP connection for the
5344 * fore and backchannel.
5345 */
2cf047c9 5346int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5347{
5348 int status;
5349 struct nfs41_bind_conn_to_session_res res;
5350 struct rpc_message msg = {
5351 .rpc_proc =
5352 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5353 .rpc_argp = clp,
5354 .rpc_resp = &res,
2cf047c9 5355 .rpc_cred = cred,
7c44f1ae
WAA		 5356 };
5357
5358 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5359
5360 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5361 if (unlikely(res.session == NULL)) {
5362 status = -ENOMEM;
5363 goto out;
5364 }
5365
5366 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5367 if (status == 0) {
5368 if (memcmp(res.session->sess_id.data,
5369 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5370 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5371 status = -EIO;
5372 goto out_session;
5373 }
5374 if (res.dir != NFS4_CDFS4_BOTH) {
5375 dprintk("NFS: %s: Unexpected direction from server\n",
5376 __func__);
5377 status = -EIO;
5378 goto out_session;
5379 }
5380 if (res.use_conn_in_rdma_mode) {
5381 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5382 __func__);
5383 status = -EIO;
5384 goto out_session;
5385 }
5386 }
5387out_session:
5388 kfree(res.session);
5389out:
5390 dprintk("<-- %s status= %d\n", __func__, status);
5391 return status;
5392}
5393
99fe60d0
BH		 5394/*
5395 * nfs4_proc_exchange_id()
5396 *
6bbb4ae8
CL		 5397 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5398 *
99fe60d0
BH		 5399 * Since the clientid has expired, all compounds using sessions
5400 * associated with the stale clientid will be returning
5401 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5402 * be in some phase of session reset.
5403 */
4d643d1d 5404int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5405{
5406 nfs4_verifier verifier;
5407 struct nfs41_exchange_id_args args = {
cd93710e 5408 .verifier = &verifier,
99fe60d0 5409 .client = clp,
357f54d6 5410 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5411 };
5412 struct nfs41_exchange_id_res res = {
32b01310 5413 0
99fe60d0
BH		 5414 };
5415 int status;
5416 struct rpc_message msg = {
5417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5418 .rpc_argp = &args,
5419 .rpc_resp = &res,
5420 .rpc_cred = cred,
5421 };
99fe60d0 5422
f092075d 5423 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5424 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5425 sizeof(args.id));
6bbb4ae8
CL		 5426 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5427 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5428 args.id_len, args.id);
99fe60d0 5429
acdeb69d 5430 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5431 GFP_NOFS);
acdeb69d 5432 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5433 status = -ENOMEM;
5434 goto out;
5435 }
78fe0f41 5436
79d4e1f0 5437 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5438 GFP_NOFS);
177313f1 5439 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5440 status = -ENOMEM;
acdeb69d 5441 goto out_server_owner;
abe9a6d5 5442 }
78fe0f41 5443
bbafffd2 5444 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5445 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5446 status = -ENOMEM;
5447 goto out_server_scope;
5448 }
5449
1bd714f2 5450 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5451 if (status == 0)
32b01310 5452 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5453
acdeb69d 5454 if (status == 0) {
32b01310
TM		 5455 clp->cl_clientid = res.clientid;
5456 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5457 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5458 clp->cl_seqid = res.seqid;
5459
acdeb69d
CL		 5460 kfree(clp->cl_serverowner);
5461 clp->cl_serverowner = res.server_owner;
5462 res.server_owner = NULL;
78fe0f41 5463
7d2ed9ac 5464 /* use the most recent implementation id */
59155546
CL		 5465 kfree(clp->cl_implid);
5466 clp->cl_implid = res.impl_id;
7d2ed9ac 5467
177313f1 5468 if (clp->cl_serverscope != NULL &&
79d4e1f0 5469 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5470 res.server_scope)) {
5471 dprintk("%s: server_scope mismatch detected\n",
5472 __func__);
5473 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5474 kfree(clp->cl_serverscope);
5475 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5476 }
5477
177313f1 5478 if (clp->cl_serverscope == NULL) {
79d4e1f0 5479 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5480 goto out;
5481 }
32b01310
TM		 5482 } else
5483 kfree(res.impl_id);
7d2ed9ac 5484
acdeb69d
CL		 5485out_server_owner:
5486 kfree(res.server_owner);
7d2ed9ac 5487out_server_scope:
abe9a6d5
WAA		 5488 kfree(res.server_scope);
5489out:
177313f1 5490 if (clp->cl_implid != NULL)
6bbb4ae8 5491 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5492 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5493 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5494 clp->cl_implid->date.seconds,
5495 clp->cl_implid->date.nseconds);
6bbb4ae8 5496 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5497 return status;
5498}
5499
66245539
TM		 5500static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5501 struct rpc_cred *cred)
5502{
5503 struct rpc_message msg = {
5504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5505 .rpc_argp = clp,
5506 .rpc_cred = cred,
5507 };
5508 int status;
5509
5510 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5511 if (status)
02c67525 5512 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5513 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5514 return status;
5515}
5516
5517static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5518 struct rpc_cred *cred)
5519{
5520 unsigned int loop;
5521 int ret;
5522
5523 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5524 ret = _nfs4_proc_destroy_clientid(clp, cred);
5525 switch (ret) {
5526 case -NFS4ERR_DELAY:
5527 case -NFS4ERR_CLIENTID_BUSY:
5528 ssleep(1);
5529 break;
5530 default:
5531 return ret;
5532 }
5533 }
5534 return 0;
5535}
5536
5537int nfs4_destroy_clientid(struct nfs_client *clp)
5538{
5539 struct rpc_cred *cred;
5540 int ret = 0;
5541
5542 if (clp->cl_mvops->minor_version < 1)
5543 goto out;
5544 if (clp->cl_exchange_flags == 0)
5545 goto out;
05f4c350
CL		 5546 if (clp->cl_preserve_clid)
5547 goto out;
66245539
TM		 5548 cred = nfs4_get_exchange_id_cred(clp);
5549 ret = nfs4_proc_destroy_clientid(clp, cred);
5550 if (cred)
5551 put_rpccred(cred);
5552 switch (ret) {
5553 case 0:
5554 case -NFS4ERR_STALE_CLIENTID:
5555 clp->cl_exchange_flags = 0;
5556 }
5557out:
5558 return ret;
5559}
5560
2050f0cc
AA		 5561struct nfs4_get_lease_time_data {
5562 struct nfs4_get_lease_time_args *args;
5563 struct nfs4_get_lease_time_res *res;
5564 struct nfs_client *clp;
5565};
5566
5567static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5568 void *calldata)
5569{
5570 int ret;
5571 struct nfs4_get_lease_time_data *data =
5572 (struct nfs4_get_lease_time_data *)calldata;
5573
5574 dprintk("--> %s\n", __func__);
689cf5c1 5575 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5576 /* just setup sequence, do not trigger session recovery
5577 since we're invoked within one */
5578 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5579 &data->args->la_seq_args,
9d12b216 5580 &data->res->lr_seq_res, task);
2050f0cc 5581
d3edcf96
TM		 5582 if (ret != -EAGAIN)
5583 rpc_call_start(task);
2050f0cc
AA		 5584 dprintk("<-- %s\n", __func__);
5585}
5586
5587/*
5588 * Called from nfs4_state_manager thread for session setup, so don't recover
5589 * from sequence operation or clientid errors.
5590 */
5591static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5592{
5593 struct nfs4_get_lease_time_data *data =
5594 (struct nfs4_get_lease_time_data *)calldata;
5595
5596 dprintk("--> %s\n", __func__);
14516c3a
TM		 5597 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5598 return;
2050f0cc
AA		 5599 switch (task->tk_status) {
5600 case -NFS4ERR_DELAY:
5601 case -NFS4ERR_GRACE:
5602 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5603 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5604 task->tk_status = 0;
a8a4ae3a
AA		 5605 /* fall through */
5606 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5607 rpc_restart_call_prepare(task);
2050f0cc
AA		 5608 return;
5609 }
2050f0cc
AA		 5610 dprintk("<-- %s\n", __func__);
5611}
5612
17280175 5613static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5614 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5615 .rpc_call_done = nfs4_get_lease_time_done,
5616};
5617
5618int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5619{
5620 struct rpc_task *task;
5621 struct nfs4_get_lease_time_args args;
5622 struct nfs4_get_lease_time_res res = {
5623 .lr_fsinfo = fsinfo,
5624 };
5625 struct nfs4_get_lease_time_data data = {
5626 .args = &args,
5627 .res = &res,
5628 .clp = clp,
5629 };
5630 struct rpc_message msg = {
5631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5632 .rpc_argp = &args,
5633 .rpc_resp = &res,
5634 };
5635 struct rpc_task_setup task_setup = {
5636 .rpc_client = clp->cl_rpcclient,
5637 .rpc_message = &msg,
5638 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5639 .callback_data = &data,
5640 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5641 };
5642 int status;
5643
9d12b216 5644 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5645 dprintk("--> %s\n", __func__);
5646 task = rpc_run_task(&task_setup);
5647
5648 if (IS_ERR(task))
5649 status = PTR_ERR(task);
5650 else {
5651 status = task->tk_status;
5652 rpc_put_task(task);
5653 }
5654 dprintk("<-- %s return %d\n", __func__, status);
5655
5656 return status;
5657}
5658
9216106a 5659struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
f86f36a6 5660{
2d473d37 5661 return kmalloc_array(max_slots, sizeof(struct nfs4_slot), gfp_flags);
f86f36a6
TM		 5662}
5663
5664static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5665 struct nfs4_slot *new,
5666 u32 max_slots,
5667 u32 ivalue)
5668{
5669 struct nfs4_slot *old = NULL;
5670 u32 i;
5671
5672 spin_lock(&tbl->slot_tbl_lock);
5673 if (new) {
5674 old = tbl->slots;
5675 tbl->slots = new;
5676 tbl->max_slots = max_slots;
5677 }
f9b1ef5f 5678 tbl->highest_used_slotid = NFS4_NO_SLOT;
f86f36a6
TM		 5679 for (i = 0; i < tbl->max_slots; i++)
5680 tbl->slots[i].seq_nr = ivalue;
5681 spin_unlock(&tbl->slot_tbl_lock);
5682 kfree(old);
5683}
5684
b73dafa7 5685/*
f86f36a6 5686 * (re)Initialise a slot table
b73dafa7 5687 */
f86f36a6
TM		 5688static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5689 u32 ivalue)
ac72b7b3 5690{
104aeba4 5691 struct nfs4_slot *new = NULL;
f86f36a6 5692 int ret = -ENOMEM;
ac72b7b3 5693
104aeba4
AA		 5694 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5695 max_reqs, tbl->max_slots);
ac72b7b3 5696
104aeba4
AA		 5697 /* Does the newly negotiated max_reqs match the existing slot table? */
5698 if (max_reqs != tbl->max_slots) {
f86f36a6 5699 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5700 if (!new)
5701 goto out;
104aeba4 5702 }
f86f36a6
TM		 5703 ret = 0;
5704
5705 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5706 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5707 tbl, tbl->slots, tbl->max_slots);
5708out:
5709 dprintk("<-- %s: return %d\n", __func__, ret);
5710 return ret;
5711}
5712
f8625a6a
RL		 5713/* Destroy the slot table */
5714static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5715{
5716 if (session->fc_slot_table.slots != NULL) {
5717 kfree(session->fc_slot_table.slots);
5718 session->fc_slot_table.slots = NULL;
5719 }
5720 if (session->bc_slot_table.slots != NULL) {
5721 kfree(session->bc_slot_table.slots);
5722 session->bc_slot_table.slots = NULL;
5723 }
5724 return;
5725}
5726
050047ce 5727/*
aacd5537 5728 * Initialize or reset the forechannel and backchannel tables
050047ce 5729 */
aacd5537 5730static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5731{
f26468fb 5732 struct nfs4_slot_table *tbl;
aacd5537 5733 int status;
050047ce 5734
aacd5537
AA		 5735 dprintk("--> %s\n", __func__);
5736 /* Fore channel */
5737 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5738 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5739 if (status) /* -ENOMEM */
5740 return status;
aacd5537
AA		 5741 /* Back channel */
5742 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5743 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5744 if (status && tbl->slots == NULL)
5745 /* Fore and back channel share a connection so get
5746 * both slot tables or neither */
5747 nfs4_destroy_slot_tables(ses);
f8625a6a 5748 return status;
557134a3
AA		 5749}
5750
5751struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5752{
5753 struct nfs4_session *session;
5754 struct nfs4_slot_table *tbl;
5755
8535b2be 5756 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5757 if (!session)
5758 return NULL;
76db6d95 5759
557134a3 5760 tbl = &session->fc_slot_table;
45d43c29 5761 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5762 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5763 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5764 init_completion(&tbl->complete);
f8625a6a
RL		 5765
5766 tbl = &session->bc_slot_table;
45d43c29 5767 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5768 spin_lock_init(&tbl->slot_tbl_lock);
5769 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5770 init_completion(&tbl->complete);
f8625a6a 5771
1055d76d
TM		 5772 session->session_state = 1<<NFS4_SESSION_INITING;
5773
557134a3
AA		 5774 session->clp = clp;
5775 return session;
5776}
5777
5778void nfs4_destroy_session(struct nfs4_session *session)
5779{
2446ab60 5780 struct rpc_xprt *xprt;
848f5bda 5781 struct rpc_cred *cred;
2446ab60 5782
848f5bda
TM		 5783 cred = nfs4_get_exchange_id_cred(session->clp);
5784 nfs4_proc_destroy_session(session, cred);
5785 if (cred)
5786 put_rpccred(cred);
2446ab60
TM		 5787
5788 rcu_read_lock();
5789 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5790 rcu_read_unlock();
5a0ffe54 5791 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5792 __func__, xprt);
5793 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5794 nfs4_destroy_slot_tables(session);
557134a3
AA		 5795 kfree(session);
5796}
5797
fc931582
AA		 5798/*
5799 * Initialize the values to be used by the client in CREATE_SESSION
5800 * If nfs4_init_session set the fore channel request and response sizes,
5801 * use them.
5802 *
5803 * Set the back channel max_resp_sz_cached to zero to force the client to
5804 * always set csa_cachethis to FALSE because the current implementation
5805 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5806 */
5807static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5808{
5809 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5810 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5811 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5812
5813 if (mxrqst_sz == 0)
5814 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5815 if (mxresp_sz == 0)
5816 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5817 /* Fore channel attributes */
fc931582
AA		 5818 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5819 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5820 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5821 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5822
5823 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5824 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5825 __func__,
5826 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5827 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5828
5829 /* Back channel attributes */
fc931582
AA		 5830 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5831 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5832 args->bc_attrs.max_resp_sz_cached = 0;
5833 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5834 args->bc_attrs.max_reqs = 1;
5835
5836 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5837 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5838 __func__,
5839 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5840 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5841 args->bc_attrs.max_reqs);
5842}
5843
43c2e885 5844static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5845{
43c2e885
BF		 5846 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5847 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5848
43c2e885
BF		 5849 if (rcvd->max_resp_sz > sent->max_resp_sz)
5850 return -EINVAL;
5851 /*
5852 * Our requested max_ops is the minimum we need; we're not
5853 * prepared to break up compounds into smaller pieces than that.
5854 * So, no point even trying to continue if the server won't
5855 * cooperate:
5856 */
5857 if (rcvd->max_ops < sent->max_ops)
5858 return -EINVAL;
5859 if (rcvd->max_reqs == 0)
5860 return -EINVAL;
b4b9a0c1
VG		 5861 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5862 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5863 return 0;
8d35301d
AA		 5864}
5865
43c2e885
BF		 5866static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5867{
5868 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5869 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5870
43c2e885
BF		 5871 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5872 return -EINVAL;
5873 if (rcvd->max_resp_sz < sent->max_resp_sz)
5874 return -EINVAL;
5875 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5876 return -EINVAL;
5877 /* These would render the backchannel useless: */
b4b9a0c1 5878 if (rcvd->max_ops != sent->max_ops)
43c2e885 5879 return -EINVAL;
b4b9a0c1 5880 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5881 return -EINVAL;
5882 return 0;
5883}
8d35301d 5884
8d35301d
AA		 5885static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5886 struct nfs4_session *session)
5887{
43c2e885 5888 int ret;
8d35301d 5889
43c2e885
BF		 5890 ret = nfs4_verify_fore_channel_attrs(args, session);
5891 if (ret)
5892 return ret;
5893 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5894}
5895
848f5bda
TM		 5896static int _nfs4_proc_create_session(struct nfs_client *clp,
5897 struct rpc_cred *cred)
fc931582
AA		 5898{
5899 struct nfs4_session *session = clp->cl_session;
5900 struct nfs41_create_session_args args = {
5901 .client = clp,
5902 .cb_program = NFS4_CALLBACK,
5903 };
5904 struct nfs41_create_session_res res = {
5905 .client = clp,
5906 };
5907 struct rpc_message msg = {
5908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5909 .rpc_argp = &args,
5910 .rpc_resp = &res,
848f5bda 5911 .rpc_cred = cred,
fc931582
AA		 5912 };
5913 int status;
5914
5915 nfs4_init_channel_attrs(&args);
0f91421e 5916 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5917
1bd714f2 5918 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5919
43095d39 5920 if (!status) {
8d35301d
AA		 5921 /* Verify the session's negotiated channel_attrs values */
5922 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5923 /* Increment the clientid slot sequence id */
5924 clp->cl_seqid++;
5925 }
5926
5927 return status;
5928}
5929
5930/*
5931 * Issues a CREATE_SESSION operation to the server.
5932 * It is the responsibility of the caller to verify the session is
5933 * expired before calling this routine.
5934 */
848f5bda 5935int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5936{
5937 int status;
5938 unsigned *ptr;
fc931582
AA		 5939 struct nfs4_session *session = clp->cl_session;
5940
5941 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5942
848f5bda 5943 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5944 if (status)
5945 goto out;
5946
aacd5537
AA		 5947 /* Init or reset the session slot tables */
5948 status = nfs4_setup_session_slot_tables(session);
5949 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5950 if (status)
5951 goto out;
5952
5953 ptr = (unsigned *)&session->sess_id.data[0];
5954 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5955 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5956out:
5957 dprintk("<-- %s\n", __func__);
5958 return status;
5959}
5960
0f3e66c6
AA		 5961/*
5962 * Issue the over-the-wire RPC DESTROY_SESSION.
5963 * The caller must serialize access to this routine.
5964 */
848f5bda
TM		 5965int nfs4_proc_destroy_session(struct nfs4_session *session,
5966 struct rpc_cred *cred)
0f3e66c6 5967{
848f5bda
TM		 5968 struct rpc_message msg = {
5969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5970 .rpc_argp = session,
5971 .rpc_cred = cred,
5972 };
0f3e66c6 5973 int status = 0;
0f3e66c6
AA		 5974
5975 dprintk("--> nfs4_proc_destroy_session\n");
5976
5977 /* session is still being setup */
5978 if (session->clp->cl_cons_state != NFS_CS_READY)
5979 return status;
5980
1bd714f2 5981 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5982
5983 if (status)
08106ac7 5984 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5985 "Session has been destroyed regardless...\n", status);
5986
5987 dprintk("<-- nfs4_proc_destroy_session\n");
5988 return status;
5989}
5990
7b38c368
TM		 5991/*
5992 * With sessions, the client is not marked ready until after a
5993 * successful EXCHANGE_ID and CREATE_SESSION.
5994 *
5995 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5996 * other versions of NFS can be tried.
5997 */
5998static int nfs41_check_session_ready(struct nfs_client *clp)
5999{
6000 int ret;
6001
6002 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6003 ret = nfs4_client_recover_expired_lease(clp);
6004 if (ret)
6005 return ret;
6006 }
6007 if (clp->cl_cons_state < NFS_CS_READY)
6008 return -EPROTONOSUPPORT;
54ac471c 6009 smp_rmb();
7b38c368
TM		 6010 return 0;
6011}
6012
fccba804
TM		 6013int nfs4_init_session(struct nfs_server *server)
6014{
6015 struct nfs_client *clp = server->nfs_client;
2449ea2e 6016 struct nfs4_session *session;
ae72ae67
TM		 6017 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6018 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
fccba804
TM		 6019
6020 if (!nfs4_has_session(clp))
6021 return 0;
6022
ae72ae67
TM		 6023 if (server->rsize != 0)
6024 target_max_resp_sz = server->rsize;
6025 target_max_resp_sz += nfs41_maxread_overhead;
6026
6027 if (server->wsize != 0)
6028 target_max_rqst_sz = server->wsize;
6029 target_max_rqst_sz += nfs41_maxwrite_overhead;
6030
1055d76d 6031 session = clp->cl_session;
7b38c368
TM		 6032 spin_lock(&clp->cl_lock);
6033 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
ae72ae67
TM		 6034 /* Initialise targets and channel attributes */
6035 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6036 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6037 session->fc_target_max_resp_sz = target_max_resp_sz;
6038 session->fc_attrs.max_resp_sz = target_max_resp_sz;
688a9024
TM		 6039 } else {
6040 /* Just adjust the targets */
6041 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6042 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6043 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6044 }
6045 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6046 session->fc_target_max_resp_sz = target_max_resp_sz;
6047 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6048 }
7b38c368
TM		 6049 }
6050 spin_unlock(&clp->cl_lock);
2449ea2e 6051
688a9024
TM		 6052 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6053 nfs4_schedule_lease_recovery(clp);
6054
7b38c368 6055 return nfs41_check_session_ready(clp);
fccba804
TM		 6056}
6057
7b38c368 6058int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 6059{
6060 struct nfs4_session *session = clp->cl_session;
6061 int ret;
6062
7b38c368
TM		 6063 spin_lock(&clp->cl_lock);
6064 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6065 /*
6066 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6067 * DS lease to be equal to the MDS lease.
6068 */
6069 clp->cl_lease_time = lease_time;
6070 clp->cl_last_renewal = jiffies;
6071 }
6072 spin_unlock(&clp->cl_lock);
d83217c1 6073
7b38c368
TM		 6074 ret = nfs41_check_session_ready(clp);
6075 if (ret)
6076 return ret;
6077 /* Test for the DS role */
6078 if (!is_ds_client(clp))
6079 return -ENODEV;
6080 return 0;
d83217c1
AA		 6081}
6082EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6083
6084
fc01cea9
AA		 6085/*
6086 * Renew the cl_session lease.
6087 */
d5f8d3fe
TM		 6088struct nfs4_sequence_data {
6089 struct nfs_client *clp;
6090 struct nfs4_sequence_args args;
6091 struct nfs4_sequence_res res;
6092};
6093
dc96aef9
AB		 6094static void nfs41_sequence_release(void *data)
6095{
d5f8d3fe
TM		 6096 struct nfs4_sequence_data *calldata = data;
6097 struct nfs_client *clp = calldata->clp;
dc96aef9 6098
7135840f
AB		 6099 if (atomic_read(&clp->cl_count) > 1)
6100 nfs4_schedule_state_renewal(clp);
6101 nfs_put_client(clp);
d5f8d3fe 6102 kfree(calldata);
dc96aef9
AB		 6103}
6104
aa5190d0
TM		 6105static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6106{
6107 switch(task->tk_status) {
6108 case -NFS4ERR_DELAY:
aa5190d0
TM		 6109 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6110 return -EAGAIN;
6111 default:
0400a6b0 6112 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6113 }
6114 return 0;
6115}
6116
dc96aef9 6117static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6118{
d5f8d3fe
TM		 6119 struct nfs4_sequence_data *calldata = data;
6120 struct nfs_client *clp = calldata->clp;
fc01cea9 6121
14516c3a
TM		 6122 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6123 return;
fc01cea9
AA		 6124
6125 if (task->tk_status < 0) {
6126 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6127 if (atomic_read(&clp->cl_count) == 1)
6128 goto out;
fc01cea9 6129
aa5190d0
TM		 6130 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6131 rpc_restart_call_prepare(task);
fc01cea9
AA		 6132 return;
6133 }
6134 }
fc01cea9 6135 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6136out:
fc01cea9
AA		 6137 dprintk("<-- %s\n", __func__);
6138}
6139
6140static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6141{
d5f8d3fe
TM		 6142 struct nfs4_sequence_data *calldata = data;
6143 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6144 struct nfs4_sequence_args *args;
6145 struct nfs4_sequence_res *res;
6146
fc01cea9
AA		 6147 args = task->tk_msg.rpc_argp;
6148 res = task->tk_msg.rpc_resp;
6149
9d12b216 6150 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6151 return;
6152 rpc_call_start(task);
6153}
6154
6bdb5f21
BS		 6155static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6156{
6157 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6158 nfs41_sequence_prepare(task, data);
6159}
6160
fc01cea9
AA		 6161static const struct rpc_call_ops nfs41_sequence_ops = {
6162 .rpc_call_done = nfs41_sequence_call_done,
6163 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6164 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6165};
6166
6bdb5f21
BS		 6167static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6168 .rpc_call_done = nfs41_sequence_call_done,
6169 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6170 .rpc_release = nfs41_sequence_release,
6171};
6172
6173static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6174 const struct rpc_call_ops *seq_ops)
fc01cea9 6175{
d5f8d3fe 6176 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6177 struct rpc_message msg = {
6178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6179 .rpc_cred = cred,
6180 };
71ac6da9
TM		 6181 struct rpc_task_setup task_setup_data = {
6182 .rpc_client = clp->cl_rpcclient,
6183 .rpc_message = &msg,
6bdb5f21 6184 .callback_ops = seq_ops,
71ac6da9
TM		 6185 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6186 };
fc01cea9 6187
7135840f 6188 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6189 return ERR_PTR(-EIO);
dfb4f309 6190 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6191 if (calldata == NULL) {
7135840f 6192 nfs_put_client(clp);
71ac6da9 6193 return ERR_PTR(-ENOMEM);
fc01cea9 6194 }
9d12b216 6195 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6196 msg.rpc_argp = &calldata->args;
6197 msg.rpc_resp = &calldata->res;
6198 calldata->clp = clp;
71ac6da9 6199 task_setup_data.callback_data = calldata;
fc01cea9 6200
71ac6da9
TM		 6201 return rpc_run_task(&task_setup_data);
6202}
6203
2f60ea6b 6204static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6205{
6206 struct rpc_task *task;
6207 int ret = 0;
6208
2f60ea6b
TM		 6209 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6210 return 0;
6bdb5f21 6211 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
71ac6da9
TM		 6212 if (IS_ERR(task))
6213 ret = PTR_ERR(task);
6214 else
bf294b41 6215 rpc_put_task_async(task);
71ac6da9
TM		 6216 dprintk("<-- %s status=%d\n", __func__, ret);
6217 return ret;
6218}
6219
6220static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6221{
6222 struct rpc_task *task;
6223 int ret;
6224
6bdb5f21 6225 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
71ac6da9
TM		 6226 if (IS_ERR(task)) {
6227 ret = PTR_ERR(task);
6228 goto out;
6229 }
6230 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6231 if (!ret) {
6232 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6233
6234 if (task->tk_status == 0)
6235 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6236 ret = task->tk_status;
b4410c2f 6237 }
71ac6da9
TM		 6238 rpc_put_task(task);
6239out:
6240 dprintk("<-- %s status=%d\n", __func__, ret);
6241 return ret;
fc01cea9
AA		 6242}
6243
fce5c838
RL		 6244struct nfs4_reclaim_complete_data {
6245 struct nfs_client *clp;
6246 struct nfs41_reclaim_complete_args arg;
6247 struct nfs41_reclaim_complete_res res;
6248};
6249
6250static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6251{
6252 struct nfs4_reclaim_complete_data *calldata = data;
6253
b257957e 6254 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6255 if (nfs41_setup_sequence(calldata->clp->cl_session,
6256 &calldata->arg.seq_args,
9d12b216 6257 &calldata->res.seq_res, task))
fce5c838
RL		 6258 return;
6259
6260 rpc_call_start(task);
6261}
6262
aa5190d0
TM		 6263static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6264{
6265 switch(task->tk_status) {
6266 case 0:
6267 case -NFS4ERR_COMPLETE_ALREADY:
6268 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6269 break;
6270 case -NFS4ERR_DELAY:
aa5190d0 6271 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6272 /* fall through */
6273 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6274 return -EAGAIN;
6275 default:
0400a6b0 6276 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6277 }
6278 return 0;
6279}
6280
fce5c838
RL		 6281static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6282{
6283 struct nfs4_reclaim_complete_data *calldata = data;
6284 struct nfs_client *clp = calldata->clp;
6285 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6286
6287 dprintk("--> %s\n", __func__);
14516c3a
TM		 6288 if (!nfs41_sequence_done(task, res))
6289 return;
fce5c838 6290
aa5190d0
TM		 6291 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6292 rpc_restart_call_prepare(task);
6293 return;
6294 }
fce5c838
RL		 6295 dprintk("<-- %s\n", __func__);
6296}
6297
6298static void nfs4_free_reclaim_complete_data(void *data)
6299{
6300 struct nfs4_reclaim_complete_data *calldata = data;
6301
6302 kfree(calldata);
6303}
6304
6305static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6306 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6307 .rpc_call_done = nfs4_reclaim_complete_done,
6308 .rpc_release = nfs4_free_reclaim_complete_data,
6309};
6310
6311/*
6312 * Issue a global reclaim complete.
6313 */
6314static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6315{
6316 struct nfs4_reclaim_complete_data *calldata;
6317 struct rpc_task *task;
6318 struct rpc_message msg = {
6319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6320 };
6321 struct rpc_task_setup task_setup_data = {
6322 .rpc_client = clp->cl_rpcclient,
6323 .rpc_message = &msg,
6324 .callback_ops = &nfs4_reclaim_complete_call_ops,
6325 .flags = RPC_TASK_ASYNC,
6326 };
6327 int status = -ENOMEM;
6328
6329 dprintk("--> %s\n", __func__);
8535b2be 6330 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6331 if (calldata == NULL)
6332 goto out;
6333 calldata->clp = clp;
6334 calldata->arg.one_fs = 0;
fce5c838 6335
9d12b216 6336 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6337 msg.rpc_argp = &calldata->arg;
6338 msg.rpc_resp = &calldata->res;
6339 task_setup_data.callback_data = calldata;
6340 task = rpc_run_task(&task_setup_data);
acf82b85 6341 if (IS_ERR(task)) {
fce5c838 6342 status = PTR_ERR(task);
acf82b85
DC		 6343 goto out;
6344 }
c34c32ea
AA		 6345 status = nfs4_wait_for_completion_rpc_task(task);
6346 if (status == 0)
6347 status = task->tk_status;
fce5c838 6348 rpc_put_task(task);
acf82b85 6349 return 0;
fce5c838
RL		 6350out:
6351 dprintk("<-- %s status=%d\n", __func__, status);
6352 return status;
6353}
b1f69b75
AA		 6354
6355static void
6356nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6357{
6358 struct nfs4_layoutget *lgp = calldata;
c31663d4 6359 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6360
6361 dprintk("--> %s\n", __func__);
c31663d4
FI		 6362 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6363 * right now covering the LAYOUTGET we are about to send.
6364 * However, that is not so catastrophic, and there seems
6365 * to be no way to prevent it completely.
6366 */
b1f69b75 6367 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6368 &lgp->res.seq_res, task))
b1f69b75 6369 return;
cf7d63f1
FI		 6370 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6371 NFS_I(lgp->args.inode)->layout,
6372 lgp->args.ctx->state)) {
6373 rpc_exit(task, NFS4_OK);
6374 return;
6375 }
b1f69b75
AA		 6376 rpc_call_start(task);
6377}
6378
6379static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6380{
6381 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6382 struct inode *inode = lgp->args.inode;
6383 struct nfs_server *server = NFS_SERVER(inode);
6384 struct pnfs_layout_hdr *lo;
6385 struct nfs4_state *state = NULL;
b1f69b75
AA		 6386
6387 dprintk("--> %s\n", __func__);
6388
6389 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6390 goto out;
b1f69b75
AA		 6391
6392 switch (task->tk_status) {
6393 case 0:
ee314c2a 6394 goto out;
b1f69b75
AA		 6395 case -NFS4ERR_LAYOUTTRYLATER:
6396 case -NFS4ERR_RECALLCONFLICT:
6397 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6398 break;
6399 case -NFS4ERR_EXPIRED:
6400 case -NFS4ERR_BAD_STATEID:
6401 spin_lock(&inode->i_lock);
6402 lo = NFS_I(inode)->layout;
6403 if (!lo || list_empty(&lo->plh_segs)) {
6404 spin_unlock(&inode->i_lock);
6405 /* If the open stateid was bad, then recover it. */
6406 state = lgp->args.ctx->state;
6407 } else {
6408 LIST_HEAD(head);
6409
6410 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6411 spin_unlock(&inode->i_lock);
6412 /* Mark the bad layout state as invalid, then
6413 * retry using the open stateid. */
6414 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6415 }
6416 }
ee314c2a
TM		 6417 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6418 rpc_restart_call_prepare(task);
6419out:
b1f69b75
AA		 6420 dprintk("<-- %s\n", __func__);
6421}
6422
8554116e
IK		 6423static size_t max_response_pages(struct nfs_server *server)
6424{
6425 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6426 return nfs_page_array_len(0, max_resp_sz);
6427}
6428
6429static void nfs4_free_pages(struct page **pages, size_t size)
6430{
6431 int i;
6432
6433 if (!pages)
6434 return;
6435
6436 for (i = 0; i < size; i++) {
6437 if (!pages[i])
6438 break;
6439 __free_page(pages[i]);
6440 }
6441 kfree(pages);
6442}
6443
6444static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6445{
6446 struct page **pages;
6447 int i;
6448
6449 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6450 if (!pages) {
6451 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6452 return NULL;
6453 }
6454
6455 for (i = 0; i < size; i++) {
6456 pages[i] = alloc_page(gfp_flags);
6457 if (!pages[i]) {
6458 dprintk("%s: failed to allocate page\n", __func__);
6459 nfs4_free_pages(pages, size);
6460 return NULL;
6461 }
6462 }
6463
6464 return pages;
6465}
6466
b1f69b75
AA		 6467static void nfs4_layoutget_release(void *calldata)
6468{
6469 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6470 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6471 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6472
6473 dprintk("--> %s\n", __func__);
8554116e 6474 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6475 put_nfs_open_context(lgp->args.ctx);
6476 kfree(calldata);
6477 dprintk("<-- %s\n", __func__);
6478}
6479
6480static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6481 .rpc_call_prepare = nfs4_layoutget_prepare,
6482 .rpc_call_done = nfs4_layoutget_done,
6483 .rpc_release = nfs4_layoutget_release,
6484};
6485
a0b0a6e3
TM		 6486struct pnfs_layout_segment *
6487nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6488{
6489 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6490 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6491 struct rpc_task *task;
6492 struct rpc_message msg = {
6493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6494 .rpc_argp = &lgp->args,
6495 .rpc_resp = &lgp->res,
6496 };
6497 struct rpc_task_setup task_setup_data = {
6498 .rpc_client = server->client,
6499 .rpc_message = &msg,
6500 .callback_ops = &nfs4_layoutget_call_ops,
6501 .callback_data = lgp,
6502 .flags = RPC_TASK_ASYNC,
6503 };
a0b0a6e3 6504 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6505 int status = 0;
6506
6507 dprintk("--> %s\n", __func__);
6508
8554116e
IK		 6509 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6510 if (!lgp->args.layout.pages) {
6511 nfs4_layoutget_release(lgp);
a0b0a6e3 6512 return ERR_PTR(-ENOMEM);
8554116e
IK		 6513 }
6514 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6515
35124a09 6516 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6517 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6518 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6519 task = rpc_run_task(&task_setup_data);
6520 if (IS_ERR(task))
a0b0a6e3 6521 return ERR_CAST(task);
b1f69b75 6522 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6523 if (status == 0)
6524 status = task->tk_status;
6525 if (status == 0)
a0b0a6e3 6526 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6527 rpc_put_task(task);
6528 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6529 if (status)
6530 return ERR_PTR(status);
6531 return lseg;
b1f69b75
AA		 6532}
6533
cbe82603
BH		 6534static void
6535nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6536{
6537 struct nfs4_layoutreturn *lrp = calldata;
6538
6539 dprintk("--> %s\n", __func__);
6540 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6541 &lrp->res.seq_res, task))
cbe82603
BH		 6542 return;
6543 rpc_call_start(task);
6544}
6545
6546static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6547{
6548 struct nfs4_layoutreturn *lrp = calldata;
6549 struct nfs_server *server;
6550
6551 dprintk("--> %s\n", __func__);
6552
6553 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6554 return;
6555
6556 server = NFS_SERVER(lrp->args.inode);
6557 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6558 rpc_restart_call_prepare(task);
cbe82603
BH		 6559 return;
6560 }
cbe82603
BH		 6561 dprintk("<-- %s\n", __func__);
6562}
6563
6564static void nfs4_layoutreturn_release(void *calldata)
6565{
6566 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6567 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6568
6569 dprintk("--> %s\n", __func__);
849b286f
TM		 6570 spin_lock(&lo->plh_inode->i_lock);
6571 if (lrp->res.lrs_present)
6572 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6573 lo->plh_block_lgets--;
6574 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6575 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6576 kfree(calldata);
6577 dprintk("<-- %s\n", __func__);
6578}
6579
6580static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6581 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6582 .rpc_call_done = nfs4_layoutreturn_done,
6583 .rpc_release = nfs4_layoutreturn_release,
6584};
6585
6586int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6587{
6588 struct rpc_task *task;
6589 struct rpc_message msg = {
6590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6591 .rpc_argp = &lrp->args,
6592 .rpc_resp = &lrp->res,
6593 };
6594 struct rpc_task_setup task_setup_data = {
6595 .rpc_client = lrp->clp->cl_rpcclient,
6596 .rpc_message = &msg,
6597 .callback_ops = &nfs4_layoutreturn_call_ops,
6598 .callback_data = lrp,
6599 };
6600 int status;
6601
6602 dprintk("--> %s\n", __func__);
9d12b216 6603 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6604 task = rpc_run_task(&task_setup_data);
6605 if (IS_ERR(task))
6606 return PTR_ERR(task);
6607 status = task->tk_status;
6608 dprintk("<-- %s status=%d\n", __func__, status);
6609 rpc_put_task(task);
6610 return status;
6611}
6612
7f11d8d3
AA		 6613/*
6614 * Retrieve the list of Data Server devices from the MDS.
6615 */
6616static int _nfs4_getdevicelist(struct nfs_server *server,
6617 const struct nfs_fh *fh,
6618 struct pnfs_devicelist *devlist)
6619{
6620 struct nfs4_getdevicelist_args args = {
6621 .fh = fh,
6622 .layoutclass = server->pnfs_curr_ld->id,
6623 };
6624 struct nfs4_getdevicelist_res res = {
6625 .devlist = devlist,
6626 };
6627 struct rpc_message msg = {
6628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6629 .rpc_argp = &args,
6630 .rpc_resp = &res,
6631 };
6632 int status;
6633
6634 dprintk("--> %s\n", __func__);
6635 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6636 &res.seq_res, 0);
6637 dprintk("<-- %s status=%d\n", __func__, status);
6638 return status;
6639}
6640
6641int nfs4_proc_getdevicelist(struct nfs_server *server,
6642 const struct nfs_fh *fh,
6643 struct pnfs_devicelist *devlist)
6644{
6645 struct nfs4_exception exception = { };
6646 int err;
6647
6648 do {
6649 err = nfs4_handle_exception(server,
6650 _nfs4_getdevicelist(server, fh, devlist),
6651 &exception);
6652 } while (exception.retry);
6653
6654 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6655 err, devlist->num_devs);
6656
6657 return err;
6658}
6659EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6660
b1f69b75
AA		 6661static int
6662_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6663{
6664 struct nfs4_getdeviceinfo_args args = {
6665 .pdev = pdev,
6666 };
6667 struct nfs4_getdeviceinfo_res res = {
6668 .pdev = pdev,
6669 };
6670 struct rpc_message msg = {
6671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6672 .rpc_argp = &args,
6673 .rpc_resp = &res,
6674 };
6675 int status;
6676
6677 dprintk("--> %s\n", __func__);
7c513058 6678 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6679 dprintk("<-- %s status=%d\n", __func__, status);
6680
6681 return status;
6682}
6683
6684int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6685{
6686 struct nfs4_exception exception = { };
6687 int err;
6688
6689 do {
6690 err = nfs4_handle_exception(server,
6691 _nfs4_proc_getdeviceinfo(server, pdev),
6692 &exception);
6693 } while (exception.retry);
6694 return err;
6695}
6696EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6697
863a3c6c
AA		 6698static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6699{
6700 struct nfs4_layoutcommit_data *data = calldata;
6701 struct nfs_server *server = NFS_SERVER(data->args.inode);
6702
6703 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6704 &data->res.seq_res, task))
863a3c6c
AA		 6705 return;
6706 rpc_call_start(task);
6707}
6708
6709static void
6710nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6711{
6712 struct nfs4_layoutcommit_data *data = calldata;
6713 struct nfs_server *server = NFS_SERVER(data->args.inode);
6714
6715 if (!nfs4_sequence_done(task, &data->res.seq_res))
6716 return;
6717
6718 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6719 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6720 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6721 case -NFS4ERR_BADLAYOUT: /* no layout */
6722 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6723 task->tk_status = 0;
e59d27e0
TM		 6724 break;
6725 case 0:
863a3c6c
AA		 6726 nfs_post_op_update_inode_force_wcc(data->args.inode,
6727 data->res.fattr);
e59d27e0
TM		 6728 break;
6729 default:
6730 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6731 rpc_restart_call_prepare(task);
6732 return;
6733 }
6734 }
863a3c6c
AA		 6735}
6736
6737static void nfs4_layoutcommit_release(void *calldata)
6738{
6739 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6740 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6741 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6742
db29c089 6743 pnfs_cleanup_layoutcommit(data);
863a3c6c 6744 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6745 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6746 list_del_init(&lseg->pls_lc_list);
6747 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6748 &lseg->pls_flags))
9369a431 6749 pnfs_put_lseg(lseg);
a9bae566 6750 }
92407e75
PT		 6751
6752 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6753 smp_mb__after_clear_bit();
6754 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6755
863a3c6c
AA		 6756 put_rpccred(data->cred);
6757 kfree(data);
6758}
6759
6760static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6761 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6762 .rpc_call_done = nfs4_layoutcommit_done,
6763 .rpc_release = nfs4_layoutcommit_release,
6764};
6765
6766int
ef311537 6767nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6768{
6769 struct rpc_message msg = {
6770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6771 .rpc_argp = &data->args,
6772 .rpc_resp = &data->res,
6773 .rpc_cred = data->cred,
6774 };
6775 struct rpc_task_setup task_setup_data = {
6776 .task = &data->task,
6777 .rpc_client = NFS_CLIENT(data->args.inode),
6778 .rpc_message = &msg,
6779 .callback_ops = &nfs4_layoutcommit_ops,
6780 .callback_data = data,
6781 .flags = RPC_TASK_ASYNC,
6782 };
6783 struct rpc_task *task;
6784 int status = 0;
6785
6786 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6787 "lbw: %llu inode %lu\n",
6788 data->task.tk_pid, sync,
6789 data->args.lastbytewritten,
6790 data->args.inode->i_ino);
6791
9d12b216 6792 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6793 task = rpc_run_task(&task_setup_data);
6794 if (IS_ERR(task))
6795 return PTR_ERR(task);
ef311537 6796 if (sync == false)
863a3c6c
AA		 6797 goto out;
6798 status = nfs4_wait_for_completion_rpc_task(task);
6799 if (status != 0)
6800 goto out;
6801 status = task->tk_status;
6802out:
6803 dprintk("%s: status %d\n", __func__, status);
6804 rpc_put_task(task);
6805 return status;
6806}
fca78d6d
BS		 6807
6808static int
6809_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6810 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6811{
6812 struct nfs41_secinfo_no_name_args args = {
6813 .style = SECINFO_STYLE_CURRENT_FH,
6814 };
6815 struct nfs4_secinfo_res res = {
6816 .flavors = flavors,
6817 };
6818 struct rpc_message msg = {
6819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6820 .rpc_argp = &args,
6821 .rpc_resp = &res,
6822 };
6823 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6824}
6825
6826static int
6827nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6828 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6829{
6830 struct nfs4_exception exception = { };
6831 int err;
6832 do {
6833 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6834 switch (err) {
6835 case 0:
6836 case -NFS4ERR_WRONGSEC:
6837 case -NFS4ERR_NOTSUPP:
05e9cfb4 6838 goto out;
fca78d6d
BS		 6839 default:
6840 err = nfs4_handle_exception(server, err, &exception);
6841 }
6842 } while (exception.retry);
05e9cfb4 6843out:
fca78d6d
BS		 6844 return err;
6845}
6846
6847static int
6848nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6849 struct nfs_fsinfo *info)
6850{
6851 int err;
6852 struct page *page;
6853 rpc_authflavor_t flavor;
6854 struct nfs4_secinfo_flavors *flavors;
6855
6856 page = alloc_page(GFP_KERNEL);
6857 if (!page) {
6858 err = -ENOMEM;
6859 goto out;
6860 }
6861
6862 flavors = page_address(page);
6863 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6864
6865 /*
6866 * Fall back on "guess and check" method if
6867 * the server doesn't support SECINFO_NO_NAME
6868 */
6869 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6870 err = nfs4_find_root_sec(server, fhandle, info);
6871 goto out_freepage;
6872 }
6873 if (err)
6874 goto out_freepage;
6875
6876 flavor = nfs_find_best_sec(flavors);
6877 if (err == 0)
6878 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6879
6880out_freepage:
6881 put_page(page);
6882 if (err == -EACCES)
6883 return -EPERM;
6884out:
6885 return err;
6886}
1cab0652
BS		 6887
6888static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6889{
6890 int status;
6891 struct nfs41_test_stateid_args args = {
1cab0652 6892 .stateid = stateid,
7d974794
BS		 6893 };
6894 struct nfs41_test_stateid_res res;
6895 struct rpc_message msg = {
6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6897 .rpc_argp = &args,
6898 .rpc_resp = &res,
6899 };
1cab0652 6900
38527b15 6901 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6902 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6903 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6904 if (status != NFS_OK) {
6905 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6906 return status;
38527b15
CL		 6907 }
6908 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6909 return -res.status;
7d974794
BS		 6910}
6911
38527b15
CL		 6912/**
6913 * nfs41_test_stateid - perform a TEST_STATEID operation
6914 *
6915 * @server: server / transport on which to perform the operation
6916 * @stateid: state ID to test
6917 *
6918 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6919 * Otherwise a negative NFS4ERR value is returned if the operation
6920 * failed or the state ID is not currently valid.
6921 */
1cab0652 6922static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6923{
6924 struct nfs4_exception exception = { };
6925 int err;
6926 do {
377e507d
CL		 6927 err = _nfs41_test_stateid(server, stateid);
6928 if (err != -NFS4ERR_DELAY)
6929 break;
6930 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6931 } while (exception.retry);
6932 return err;
6933}
9aeda35f 6934
1cab0652 6935static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6936{
9aeda35f 6937 struct nfs41_free_stateid_args args = {
1cab0652 6938 .stateid = stateid,
9aeda35f
BS		 6939 };
6940 struct nfs41_free_stateid_res res;
6941 struct rpc_message msg = {
6942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6943 .rpc_argp = &args,
6944 .rpc_resp = &res,
6945 };
38527b15 6946 int status;
9aeda35f 6947
38527b15 6948 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6949 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6950 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6951 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6952 dprintk("NFS reply free_stateid: %d\n", status);
6953 return status;
9aeda35f
BS		 6954}
6955
38527b15
CL		 6956/**
6957 * nfs41_free_stateid - perform a FREE_STATEID operation
6958 *
6959 * @server: server / transport on which to perform the operation
6960 * @stateid: state ID to release
6961 *
6962 * Returns NFS_OK if the server freed "stateid". Otherwise a
6963 * negative NFS4ERR value is returned.
6964 */
1cab0652 6965static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6966{
6967 struct nfs4_exception exception = { };
6968 int err;
6969 do {
377e507d
CL		 6970 err = _nfs4_free_stateid(server, stateid);
6971 if (err != -NFS4ERR_DELAY)
6972 break;
6973 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6974 } while (exception.retry);
6975 return err;
6976}
36281caa
TM		 6977
6978static bool nfs41_match_stateid(const nfs4_stateid *s1,
6979 const nfs4_stateid *s2)
6980{
2d2f24ad 6981 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6982 return false;
6983
2d2f24ad 6984 if (s1->seqid == s2->seqid)
36281caa 6985 return true;
2d2f24ad 6986 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6987 return true;
6988
6989 return false;
6990}
6991
557134a3
AA		 6992#endif /* CONFIG_NFS_V4_1 */
6993
36281caa
TM		 6994static bool nfs4_match_stateid(const nfs4_stateid *s1,
6995 const nfs4_stateid *s2)
6996{
f597c537 6997 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6998}
6999
7000
17280175 7001static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7002 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7003 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7004 .recover_open = nfs4_open_reclaim,
7005 .recover_lock = nfs4_lock_reclaim,
591d71cb 7006 .establish_clid = nfs4_init_clientid,
90a16617 7007 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7008 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7009};
7010
591d71cb 7011#if defined(CONFIG_NFS_V4_1)
17280175 7012static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7013 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7014 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7015 .recover_open = nfs4_open_reclaim,
7016 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7017 .establish_clid = nfs41_init_clientid,
b4b82607 7018 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7019 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7020 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7021};
7022#endif /* CONFIG_NFS_V4_1 */
7023
17280175 7024static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7025 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7026 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7027 .recover_open = nfs4_open_expired,
7028 .recover_lock = nfs4_lock_expired,
7029 .establish_clid = nfs4_init_clientid,
90a16617 7030 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7031};
7032
7033#if defined(CONFIG_NFS_V4_1)
17280175 7034static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7035 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7036 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7037 .recover_open = nfs41_open_expired,
7038 .recover_lock = nfs41_lock_expired,
4d643d1d 7039 .establish_clid = nfs41_init_clientid,
b4b82607 7040 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7041};
591d71cb 7042#endif /* CONFIG_NFS_V4_1 */
1da177e4 7043
17280175 7044static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7045 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7046 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7047 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7048};
7049
7050#if defined(CONFIG_NFS_V4_1)
17280175 7051static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7052 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7053 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7054 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7055};
7056#endif
7057
97dc1359
TM		 7058static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7059 .minor_version = 0,
7060 .call_sync = _nfs4_call_sync,
36281caa 7061 .match_stateid = nfs4_match_stateid,
fca78d6d 7062 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 7063 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7064 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7065 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7066};
7067
7068#if defined(CONFIG_NFS_V4_1)
7069static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7070 .minor_version = 1,
7071 .call_sync = _nfs4_call_sync_session,
36281caa 7072 .match_stateid = nfs41_match_stateid,
fca78d6d 7073 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 7074 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7075 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7076 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7077};
7078#endif
7079
97dc1359
TM		 7080const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7081 [0] = &nfs_v4_0_minor_ops,
7082#if defined(CONFIG_NFS_V4_1)
7083 [1] = &nfs_v4_1_minor_ops,
7084#endif
7085};
7086
73a79706
BS		 7087const struct inode_operations nfs4_dir_inode_operations = {
7088 .create = nfs_create,
7089 .lookup = nfs_lookup,
7090 .atomic_open = nfs_atomic_open,
7091 .link = nfs_link,
7092 .unlink = nfs_unlink,
7093 .symlink = nfs_symlink,
7094 .mkdir = nfs_mkdir,
7095 .rmdir = nfs_rmdir,
7096 .mknod = nfs_mknod,
7097 .rename = nfs_rename,
7098 .permission = nfs_permission,
7099 .getattr = nfs_getattr,
7100 .setattr = nfs_setattr,
7101 .getxattr = generic_getxattr,
7102 .setxattr = generic_setxattr,
7103 .listxattr = generic_listxattr,
7104 .removexattr = generic_removexattr,
7105};
7106
92e1d5be 7107static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7108 .permission = nfs_permission,
7109 .getattr = nfs_getattr,
7110 .setattr = nfs_setattr,
64c2ce8b
AK		 7111 .getxattr = generic_getxattr,
7112 .setxattr = generic_setxattr,
7113 .listxattr = generic_listxattr,
7114 .removexattr = generic_removexattr,
6b3b5496
BF		 7115};
7116
509de811 7117const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7118 .version = 4, /* protocol version */
7119 .dentry_ops = &nfs4_dentry_operations,
7120 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7121 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7122 .file_ops = &nfs4_file_operations,
1da177e4 7123 .getroot = nfs4_proc_get_root,
281cad46 7124 .submount = nfs4_submount,
ff9099f2 7125 .try_mount = nfs4_try_mount,
1da177e4
LT		 7126 .getattr = nfs4_proc_getattr,
7127 .setattr = nfs4_proc_setattr,
7128 .lookup = nfs4_proc_lookup,
7129 .access = nfs4_proc_access,
7130 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7131 .create = nfs4_proc_create,
7132 .remove = nfs4_proc_remove,
7133 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7134 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7135 .unlink_done = nfs4_proc_unlink_done,
7136 .rename = nfs4_proc_rename,
d3d4152a 7137 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7138 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7139 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7140 .link = nfs4_proc_link,
7141 .symlink = nfs4_proc_symlink,
7142 .mkdir = nfs4_proc_mkdir,
7143 .rmdir = nfs4_proc_remove,
7144 .readdir = nfs4_proc_readdir,
7145 .mknod = nfs4_proc_mknod,
7146 .statfs = nfs4_proc_statfs,
7147 .fsinfo = nfs4_proc_fsinfo,
7148 .pathconf = nfs4_proc_pathconf,
e9326dca 7149 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7150 .decode_dirent = nfs4_decode_dirent,
7151 .read_setup = nfs4_proc_read_setup,
1abb5088 7152 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7153 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7154 .read_done = nfs4_read_done,
1da177e4 7155 .write_setup = nfs4_proc_write_setup,
57208fa7 7156 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7157 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7158 .write_done = nfs4_write_done,
1da177e4 7159 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7160 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7161 .commit_done = nfs4_commit_done,
1da177e4 7162 .lock = nfs4_proc_lock,
e50a1c2e 7163 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7164 .close_context = nfs4_close_context,
2b484297 7165 .open_context = nfs4_atomic_open,
011e2a7f 7166 .have_delegation = nfs4_have_delegation,
57ec14c5 7167 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7168 .alloc_client = nfs4_alloc_client,
45a52a02 7169 .init_client = nfs4_init_client,
cdb7eced 7170 .free_client = nfs4_free_client,
1179acc6
BS		 7171 .create_server = nfs4_create_server,
7172 .clone_server = nfs_clone_server,
1da177e4
LT		 7173};
7174
64c2ce8b
AK		 7175static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7176 .prefix = XATTR_NAME_NFSV4_ACL,
7177 .list = nfs4_xattr_list_nfs4_acl,
7178 .get = nfs4_xattr_get_nfs4_acl,
7179 .set = nfs4_xattr_set_nfs4_acl,
7180};
7181
7182const struct xattr_handler *nfs4_xattr_handlers[] = {
7183 &nfs4_xattr_nfs4_acl_handler,
7184 NULL
7185};
7186
1da177e4
LT		 7187/*
7188 * Local variables:
7189 * c-basic-offset: 8
7190 * End:
7191 */
Linux 6.x block layer and io_uring tree(s)