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NFS: Clean up nfs41_check_expired_stateid()
[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 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
f092075d 67#include "netns.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
a78cb57a
TM		 74#define NFS4_MAX_LOOP_ON_RECOVER (10)
75
ef159e91
TM		 76static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
77
cdd4e68b 78struct nfs4_opendata;
864472e9 79static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 80static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 81static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 82static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 83static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 84static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 85static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 86static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
87 struct nfs_fattr *fattr, struct iattr *sattr,
88 struct nfs4_state *state);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 92#endif
1da177e4 93/* Prevent leaks of NFSv4 errors into userland */
46f72f57 94static int nfs4_map_errors(int err)
1da177e4 95{
52567b03
TM		 96 if (err >= -1000)
97 return err;
98 switch (err) {
99 case -NFS4ERR_RESOURCE:
100 return -EREMOTEIO;
7ebb9315
BS		 101 case -NFS4ERR_WRONGSEC:
102 return -EPERM;
3ddeb7c5
TM		 103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
105 return -EINVAL;
fb13bfa7
TM		 106 case -NFS4ERR_SHARE_DENIED:
107 return -EACCES;
f25efd85
SD		 108 case -NFS4ERR_MINOR_VERS_MISMATCH:
109 return -EPROTONOSUPPORT;
52567b03 110 default:
1da177e4 111 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 112 __func__, -err);
52567b03 113 break;
1da177e4 114 }
52567b03 115 return -EIO;
1da177e4
LT		 116}
117
118/*
119 * This is our standard bitmap for GETATTR requests.
120 */
1549210f 121const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 122 FATTR4_WORD0_TYPE
123 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_SIZE
125 | FATTR4_WORD0_FSID
126 | FATTR4_WORD0_FILEID,
127 FATTR4_WORD1_MODE
128 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
136};
137
1549210f
TM		 138static const u32 nfs4_pnfs_open_bitmap[3] = {
139 FATTR4_WORD0_TYPE
140 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_SIZE
142 | FATTR4_WORD0_FSID
143 | FATTR4_WORD0_FILEID,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
154};
155
1da177e4
LT		 156const u32 nfs4_statfs_bitmap[2] = {
157 FATTR4_WORD0_FILES_AVAIL
158 | FATTR4_WORD0_FILES_FREE
159 | FATTR4_WORD0_FILES_TOTAL,
160 FATTR4_WORD1_SPACE_AVAIL
161 | FATTR4_WORD1_SPACE_FREE
162 | FATTR4_WORD1_SPACE_TOTAL
163};
164
4ce79717 165const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 166 FATTR4_WORD0_MAXLINK
167 | FATTR4_WORD0_MAXNAME,
168 0
169};
170
dae100c2 171const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 172 | FATTR4_WORD0_MAXREAD
173 | FATTR4_WORD0_MAXWRITE
174 | FATTR4_WORD0_LEASE_TIME,
55b6e774 175 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 176 | FATTR4_WORD1_FS_LAYOUT_TYPES,
177 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 178};
179
830b8e33
MN		 180const u32 nfs4_fs_locations_bitmap[2] = {
181 FATTR4_WORD0_TYPE
182 | FATTR4_WORD0_CHANGE
183 | FATTR4_WORD0_SIZE
184 | FATTR4_WORD0_FSID
185 | FATTR4_WORD0_FILEID
186 | FATTR4_WORD0_FS_LOCATIONS,
187 FATTR4_WORD1_MODE
188 | FATTR4_WORD1_NUMLINKS
189 | FATTR4_WORD1_OWNER
190 | FATTR4_WORD1_OWNER_GROUP
191 | FATTR4_WORD1_RAWDEV
192 | FATTR4_WORD1_SPACE_USED
193 | FATTR4_WORD1_TIME_ACCESS
194 | FATTR4_WORD1_TIME_METADATA
195 | FATTR4_WORD1_TIME_MODIFY
196 | FATTR4_WORD1_MOUNTED_ON_FILEID
197};
198
bc4785cd 199static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 200 struct nfs4_readdir_arg *readdir)
201{
0dbb4c67 202 __be32 *start, *p;
1da177e4
LT		 203
204 BUG_ON(readdir->count < 80);
205 if (cookie > 2) {
b7ef1956 206 readdir->cookie = cookie;
1da177e4
LT		 207 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
208 return;
209 }
210
211 readdir->cookie = 0;
212 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
213 if (cookie == 2)
214 return;
215
216 /*
217 * NFSv4 servers do not return entries for '.' and '..'
218 * Therefore, we fake these entries here. We let '.'
219 * have cookie 0 and '..' have cookie 1. Note that
220 * when talking to the server, we always send cookie 0
221 * instead of 1 or 2.
222 */
2b86ce2d 223 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 224
225 if (cookie == 0) {
226 *p++ = xdr_one; /* next */
227 *p++ = xdr_zero; /* cookie, first word */
228 *p++ = xdr_one; /* cookie, second word */
229 *p++ = xdr_one; /* entry len */
230 memcpy(p, ".\0\0\0", 4); /* entry */
231 p++;
232 *p++ = xdr_one; /* bitmap length */
233 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
234 *p++ = htonl(8); /* attribute buffer length */
4e769b93 235 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 236 }
237
238 *p++ = xdr_one; /* next */
239 *p++ = xdr_zero; /* cookie, first word */
240 *p++ = xdr_two; /* cookie, second word */
241 *p++ = xdr_two; /* entry len */
242 memcpy(p, "..\0\0", 4); /* entry */
243 p++;
244 *p++ = xdr_one; /* bitmap length */
245 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
246 *p++ = htonl(8); /* attribute buffer length */
4e769b93 247 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 248
249 readdir->pgbase = (char *)p - (char *)start;
250 readdir->count -= readdir->pgbase;
2b86ce2d 251 kunmap_atomic(start);
1da177e4
LT		 252}
253
65de872e
TM		 254static int nfs4_wait_clnt_recover(struct nfs_client *clp)
255{
256 int res;
257
258 might_sleep();
259
e005e804 260 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 261 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 262 return res;
263}
264
265static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
266{
267 int res = 0;
268
269 might_sleep();
270
271 if (*timeout <= 0)
272 *timeout = NFS4_POLL_RETRY_MIN;
273 if (*timeout > NFS4_POLL_RETRY_MAX)
274 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 275 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 276 if (fatal_signal_pending(current))
277 res = -ERESTARTSYS;
278 *timeout <<= 1;
279 return res;
280}
281
282/* This is the error handling routine for processes that are allowed
283 * to sleep.
284 */
b064eca2 285static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 286{
287 struct nfs_client *clp = server->nfs_client;
9e33bed5 288 struct nfs4_state *state = exception->state;
3114ea7a 289 struct inode *inode = exception->inode;
65de872e
TM		 290 int ret = errorcode;
291
292 exception->retry = 0;
293 switch(errorcode) {
294 case 0:
295 return 0;
3114ea7a 296 case -NFS4ERR_OPENMODE:
011e2a7f 297 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 298 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 299 exception->retry = 1;
300 return 0;
301 }
302 if (state == NULL)
303 break;
304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
a1d0b5ee 306 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 307 case -NFS4ERR_ADMIN_REVOKED:
308 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 309 if (state == NULL)
310 break;
14977489 311 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 312 nfs4_schedule_stateid_recovery(server, state);
313 goto wait_on_recovery;
0ced63d1
TM		 314 case -NFS4ERR_EXPIRED:
315 if (state != NULL)
316 nfs4_schedule_stateid_recovery(server, state);
65de872e 317 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 318 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 319 nfs4_schedule_lease_recovery(clp);
320 goto wait_on_recovery;
03391693 321#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 322 case -NFS4ERR_BADSESSION:
323 case -NFS4ERR_BADSLOT:
324 case -NFS4ERR_BAD_HIGH_SLOT:
325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
326 case -NFS4ERR_DEADSESSION:
327 case -NFS4ERR_SEQ_FALSE_RETRY:
328 case -NFS4ERR_SEQ_MISORDERED:
329 dprintk("%s ERROR: %d Reset session\n", __func__,
330 errorcode);
9f594791 331 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 332 exception->retry = 1;
b9179237 333 break;
03391693 334#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 335 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
338 * fail
339 */
340 ret = -EBUSY;
341 break;
342 }
65de872e
TM		 343 case -NFS4ERR_GRACE:
344 case -NFS4ERR_DELAY:
2c643488 345 case -EKEYEXPIRED:
65de872e
TM		 346 ret = nfs4_delay(server->client, &exception->timeout);
347 if (ret != 0)
348 break;
a8a4ae3a 349 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 350 case -NFS4ERR_OLD_STATEID:
351 exception->retry = 1;
b064eca2
TM		 352 break;
353 case -NFS4ERR_BADOWNER:
354 /* The following works around a Linux server bug! */
355 case -NFS4ERR_BADNAME:
356 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
357 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
358 exception->retry = 1;
359 printk(KERN_WARNING "NFS: v4 server %s "
360 "does not accept raw "
361 "uid/gids. "
362 "Reenabling the idmapper.\n",
363 server->nfs_client->cl_hostname);
364 }
65de872e
TM		 365 }
366 /* We failed to handle the error */
367 return nfs4_map_errors(ret);
0400a6b0 368wait_on_recovery:
a2c0b9e2
TM		 369 ret = nfs4_wait_clnt_recover(clp);
370 if (ret == 0)
371 exception->retry = 1;
372 return ret;
65de872e
TM		 373}
374
375
452e9352 376static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 377{
1da177e4
LT		 378 spin_lock(&clp->cl_lock);
379 if (time_before(clp->cl_last_renewal,timestamp))
380 clp->cl_last_renewal = timestamp;
381 spin_unlock(&clp->cl_lock);
382}
383
452e9352
TM		 384static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
385{
386 do_renew_lease(server->nfs_client, timestamp);
387}
388
cccef3b9
AA		 389#if defined(CONFIG_NFS_V4_1)
390
e2c4ab3c
AA		 391/*
392 * nfs4_free_slot - free a slot and efficiently update slot table.
393 *
394 * freeing a slot is trivially done by clearing its respective bit
395 * in the bitmap.
396 * If the freed slotid equals highest_used_slotid we want to update it
397 * so that the server would be able to size down the slot table if needed,
398 * otherwise we know that the highest_used_slotid is still in use.
399 * When updating highest_used_slotid there may be "holes" in the bitmap
400 * so we need to scan down from highest_used_slotid to 0 looking for the now
401 * highest slotid in use.
45d43c29 402 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 403 *
404 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 405 */
406static void
45d43c29 407nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 408{
45d43c29 409 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 410 /* clear used bit in bitmap */
411 __clear_bit(slotid, tbl->used_slots);
412
413 /* update highest_used_slotid when it is freed */
414 if (slotid == tbl->highest_used_slotid) {
415 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 416 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 417 tbl->highest_used_slotid = slotid;
418 else
45d43c29 419 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 420 }
45d43c29
TM		 421 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
422 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 423}
424
961a828d
TM		 425bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
426{
427 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
428 return true;
e2c4ab3c
AA		 429}
430
3bfb0fc5 431/*
42acd021 432 * Signal state manager thread if session fore channel is drained
3bfb0fc5 433 */
42acd021 434static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 435{
a2118c33 436 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 437 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
438 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 439 return;
440 }
441
45d43c29 442 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 443 return;
444
42acd021
AA		 445 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
446 complete(&ses->fc_slot_table.complete);
447}
448
449/*
450 * Signal state manager thread if session back channel is drained
451 */
452void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
453{
454 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 455 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 456 return;
457 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
458 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 459}
460
d185a334 461static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 462{
463 struct nfs4_slot_table *tbl;
464
d185a334 465 tbl = &res->sr_session->fc_slot_table;
dfb4f309 466 if (!res->sr_slot) {
13615871
AA		 467 /* just wake up the next guy waiting since
468 * we may have not consumed a slot after all */
691daf3b 469 dprintk("%s: No slot\n", __func__);
35dc1d74 470 return;
13615871 471 }
ea028ac9 472
35dc1d74 473 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 474 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 475 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 476 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 477 res->sr_slot = NULL;
13615871
AA		 478}
479
14516c3a 480static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 481{
482 unsigned long timestamp;
14516c3a 483 struct nfs_client *clp;
b0df806c
AA		 484
485 /*
486 * sr_status remains 1 if an RPC level error occurred. The server
487 * may or may not have processed the sequence operation..
488 * Proceed as if the server received and processed the sequence
489 * operation.
490 */
491 if (res->sr_status == 1)
492 res->sr_status = NFS_OK;
493
468f8613
BS		 494 /* don't increment the sequence number if the task wasn't sent */
495 if (!RPC_WAS_SENT(task))
b0df806c
AA		 496 goto out;
497
691daf3b 498 /* Check the SEQUENCE operation status */
14516c3a
TM		 499 switch (res->sr_status) {
500 case 0:
b0df806c 501 /* Update the slot's sequence and clientid lease timer */
dfb4f309 502 ++res->sr_slot->seq_nr;
b0df806c 503 timestamp = res->sr_renewal_time;
14516c3a 504 clp = res->sr_session->clp;
452e9352 505 do_renew_lease(clp, timestamp);
0629e370 506 /* Check sequence flags */
b4410c2f
TM		 507 if (res->sr_status_flags != 0)
508 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 509 break;
510 case -NFS4ERR_DELAY:
511 /* The server detected a resend of the RPC call and
512 * returned NFS4ERR_DELAY as per Section 2.10.6.2
513 * of RFC5661.
514 */
12364a4f 515 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 516 __func__,
517 res->sr_slot - res->sr_session->fc_slot_table.slots,
518 res->sr_slot->seq_nr);
14516c3a
TM		 519 goto out_retry;
520 default:
521 /* Just update the slot sequence no. */
dfb4f309 522 ++res->sr_slot->seq_nr;
b0df806c
AA		 523 }
524out:
525 /* The session may be reset by one of the error handlers. */
526 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 527 nfs41_sequence_free_slot(res);
14516c3a
TM		 528 return 1;
529out_retry:
d05dd4e9 530 if (!rpc_restart_call(task))
14516c3a
TM		 531 goto out;
532 rpc_delay(task, NFS4_POLL_RETRY_MAX);
533 return 0;
b0df806c
AA		 534}
535
14516c3a
TM		 536static int nfs4_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
df896455 538{
14516c3a
TM		 539 if (res->sr_session == NULL)
540 return 1;
541 return nfs41_sequence_done(task, res);
df896455
TM		 542}
543
510b8175
BH		 544/*
545 * nfs4_find_slot - efficiently look for a free slot
546 *
547 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
548 * If found, we mark the slot as used, update the highest_used_slotid,
549 * and respectively set up the sequence operation args.
45d43c29 550 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 551 *
552 * Note: must be called with under the slot_tbl_lock.
510b8175 553 */
45d43c29 554static u32
40ead580 555nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 556{
45d43c29
TM		 557 u32 slotid;
558 u32 ret_id = NFS4_NO_SLOT;
510b8175 559
45d43c29 560 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 561 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
562 tbl->max_slots);
563 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
564 if (slotid >= tbl->max_slots)
565 goto out;
566 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 567 if (slotid > tbl->highest_used_slotid ||
568 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 569 tbl->highest_used_slotid = slotid;
570 ret_id = slotid;
571out:
572 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
573 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 574 return ret_id;
575}
576
9d12b216
TM		 577static void nfs41_init_sequence(struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res, int cache_reply)
579{
580 args->sa_session = NULL;
581 args->sa_cache_this = 0;
582 if (cache_reply)
583 args->sa_cache_this = 1;
584 res->sr_session = NULL;
585 res->sr_slot = NULL;
586}
587
dc70d7b3 588int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 589 struct nfs4_sequence_args *args,
590 struct nfs4_sequence_res *res,
ce5039c1
AA		 591 struct rpc_task *task)
592{
fbcd4abc
AA		 593 struct nfs4_slot *slot;
594 struct nfs4_slot_table *tbl;
45d43c29 595 u32 slotid;
fbcd4abc
AA		 596
597 dprintk("--> %s\n", __func__);
ce5039c1 598 /* slot already allocated? */
dfb4f309 599 if (res->sr_slot != NULL)
ce5039c1
AA		 600 return 0;
601
fbcd4abc
AA		 602 tbl = &session->fc_slot_table;
603
604 spin_lock(&tbl->slot_tbl_lock);
a2118c33 605 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 606 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 607 /* The state manager will wait until the slot table is empty */
05f0d236 608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 609 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 610 dprintk("%s session is draining\n", __func__);
05f0d236 611 return -EAGAIN;
b069d94a
AA		 612 }
613
689cf5c1
AB		 614 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
615 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
616 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
617 spin_unlock(&tbl->slot_tbl_lock);
618 dprintk("%s enforce FIFO order\n", __func__);
619 return -EAGAIN;
620 }
621
40ead580 622 slotid = nfs4_find_slot(tbl);
45d43c29 623 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 624 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
625 spin_unlock(&tbl->slot_tbl_lock);
626 dprintk("<-- %s: no free slots\n", __func__);
627 return -EAGAIN;
628 }
629 spin_unlock(&tbl->slot_tbl_lock);
630
689cf5c1 631 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 632 slot = tbl->slots + slotid;
99fe60d0 633 args->sa_session = session;
fbcd4abc 634 args->sa_slotid = slotid;
fbcd4abc
AA		 635
636 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
637
99fe60d0 638 res->sr_session = session;
dfb4f309 639 res->sr_slot = slot;
fbcd4abc 640 res->sr_renewal_time = jiffies;
2a6e26cd 641 res->sr_status_flags = 0;
fbcd4abc
AA		 642 /*
643 * sr_status is only set in decode_sequence, and so will remain
644 * set to 1 if an rpc level failure occurs.
645 */
646 res->sr_status = 1;
ce5039c1
AA		 647 return 0;
648}
dc70d7b3 649EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 650
035168ab 651int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 652 struct nfs4_sequence_args *args,
653 struct nfs4_sequence_res *res,
ce5039c1
AA		 654 struct rpc_task *task)
655{
035168ab 656 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 657 int ret = 0;
658
9d12b216 659 if (session == NULL)
035168ab 660 goto out;
035168ab 661
12364a4f 662 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 663 __func__, session->clp, session, res->sr_slot ?
664 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 665
9d12b216 666 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 667out:
668 dprintk("<-- %s status=%d\n", __func__, ret);
669 return ret;
670}
671
672struct nfs41_call_sync_data {
035168ab 673 const struct nfs_server *seq_server;
ce5039c1
AA		 674 struct nfs4_sequence_args *seq_args;
675 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 676};
677
678static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
679{
680 struct nfs41_call_sync_data *data = calldata;
681
035168ab
TM		 682 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
683
684 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 685 data->seq_res, task))
ce5039c1
AA		 686 return;
687 rpc_call_start(task);
688}
689
b257957e
AB		 690static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
691{
692 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
693 nfs41_call_sync_prepare(task, calldata);
694}
695
69ab40c4
AA		 696static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
697{
698 struct nfs41_call_sync_data *data = calldata;
699
14516c3a 700 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 701}
702
17280175 703static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 704 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 705 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 706};
707
17280175 708static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 709 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
710 .rpc_call_done = nfs41_call_sync_done,
711};
712
7c513058
BS		 713static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
714 struct nfs_server *server,
ce5039c1
AA		 715 struct rpc_message *msg,
716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
b257957e 718 int privileged)
ce5039c1
AA		 719{
720 int ret;
721 struct rpc_task *task;
722 struct nfs41_call_sync_data data = {
035168ab 723 .seq_server = server,
ce5039c1
AA		 724 .seq_args = args,
725 .seq_res = res,
ce5039c1
AA		 726 };
727 struct rpc_task_setup task_setup = {
7c513058 728 .rpc_client = clnt,
ce5039c1
AA		 729 .rpc_message = msg,
730 .callback_ops = &nfs41_call_sync_ops,
731 .callback_data = &data
732 };
733
b257957e
AB		 734 if (privileged)
735 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 736 task = rpc_run_task(&task_setup);
737 if (IS_ERR(task))
738 ret = PTR_ERR(task);
739 else {
740 ret = task->tk_status;
741 rpc_put_task(task);
742 }
743 return ret;
744}
745
7c513058
BS		 746int _nfs4_call_sync_session(struct rpc_clnt *clnt,
747 struct nfs_server *server,
cccef3b9
AA		 748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
751 int cache_reply)
752{
9d12b216
TM		 753 nfs41_init_sequence(args, res, cache_reply);
754 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 755}
756
df896455 757#else
9d12b216
TM		 758static inline
759void nfs41_init_sequence(struct nfs4_sequence_args *args,
760 struct nfs4_sequence_res *res, int cache_reply)
761{
762}
763
14516c3a
TM		 764static int nfs4_sequence_done(struct rpc_task *task,
765 struct nfs4_sequence_res *res)
df896455 766{
14516c3a 767 return 1;
df896455 768}
cccef3b9
AA		 769#endif /* CONFIG_NFS_V4_1 */
770
7c513058
BS		 771int _nfs4_call_sync(struct rpc_clnt *clnt,
772 struct nfs_server *server,
cccef3b9
AA		 773 struct rpc_message *msg,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 int cache_reply)
777{
9d12b216 778 nfs41_init_sequence(args, res, cache_reply);
7c513058 779 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 780}
781
e73b83f2 782static inline
7c513058
BS		 783int nfs4_call_sync(struct rpc_clnt *clnt,
784 struct nfs_server *server,
e73b83f2
BS		 785 struct rpc_message *msg,
786 struct nfs4_sequence_args *args,
787 struct nfs4_sequence_res *res,
788 int cache_reply)
789{
7c513058
BS		 790 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
791 args, res, cache_reply);
e73b83f2 792}
cccef3b9 793
38478b24 794static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 795{
38478b24 796 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 797
38478b24 798 spin_lock(&dir->i_lock);
359d7d1c 799 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 800 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 801 nfs_force_lookup_revalidate(dir);
a9a4a87a 802 dir->i_version = cinfo->after;
38478b24 803 spin_unlock(&dir->i_lock);
1da177e4
LT		 804}
805
e56e0b78 806struct nfs4_opendata {
c6d00e63 807 struct kref kref;
e56e0b78
TM		 808 struct nfs_openargs o_arg;
809 struct nfs_openres o_res;
cdd4e68b
TM		 810 struct nfs_open_confirmargs c_arg;
811 struct nfs_open_confirmres c_res;
6926afd1
TM		 812 struct nfs4_string owner_name;
813 struct nfs4_string group_name;
e56e0b78 814 struct nfs_fattr f_attr;
e56e0b78 815 struct dentry *dir;
82a2c1b7 816 struct dentry *dentry;
e56e0b78 817 struct nfs4_state_owner *owner;
aac00a8d 818 struct nfs4_state *state;
e56e0b78 819 struct iattr attrs;
26e976a8 820 unsigned long timestamp;
3e309914 821 unsigned int rpc_done : 1;
24ac23ab
TM		 822 int rpc_status;
823 int cancelled;
e56e0b78
TM		 824};
825
2ced46c2
TM		 826
827static void nfs4_init_opendata_res(struct nfs4_opendata *p)
828{
829 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 830 p->o_res.seqid = p->o_arg.seqid;
831 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 832 p->o_res.server = p->o_arg.server;
833 nfs_fattr_init(&p->f_attr);
6926afd1 834 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 835}
836
82a2c1b7 837static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 838 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 839 const struct iattr *attrs,
840 gfp_t gfp_mask)
e56e0b78 841{
82a2c1b7 842 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 843 struct inode *dir = parent->d_inode;
844 struct nfs_server *server = NFS_SERVER(dir);
845 struct nfs4_opendata *p;
846
8535b2be 847 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 848 if (p == NULL)
849 goto err;
8535b2be 850 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 851 if (p->o_arg.seqid == NULL)
852 goto err_free;
82a2c1b7
AV		 853 nfs_sb_active(dentry->d_sb);
854 p->dentry = dget(dentry);
e56e0b78
TM		 855 p->dir = parent;
856 p->owner = sp;
857 atomic_inc(&sp->so_count);
858 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 859 p->o_arg.open_flags = flags;
860 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 861 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 862 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
863 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 864 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 865 p->o_arg.server = server;
866 p->o_arg.bitmask = server->attr_bitmask;
1549210f 867 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 868 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 869 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 870 __be32 verf[2];
d77d76ff 871
e56e0b78
TM		 872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 874
875 verf[0] = jiffies;
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
e56e0b78 879 }
cdd4e68b
TM		 880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 883 nfs4_init_opendata_res(p);
c6d00e63 884 kref_init(&p->kref);
e56e0b78
TM		 885 return p;
886err_free:
887 kfree(p);
888err:
889 dput(parent);
890 return NULL;
891}
892
c6d00e63 893static void nfs4_opendata_free(struct kref *kref)
e56e0b78 894{
c6d00e63
TM		 895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
82a2c1b7 897 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 898
899 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
c6d00e63
TM		 902 nfs4_put_state_owner(p->owner);
903 dput(p->dir);
82a2c1b7
AV		 904 dput(p->dentry);
905 nfs_sb_deactive(sb);
6926afd1 906 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 907 kfree(p);
908}
909
910static void nfs4_opendata_put(struct nfs4_opendata *p)
911{
912 if (p != NULL)
913 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 914}
915
06f814a3
TM		 916static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
917{
06f814a3
TM		 918 int ret;
919
06f814a3 920 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 921 return ret;
922}
923
dc0b027d 924static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 925{
926 int ret = 0;
dc0b027d 927
536e43d1 928 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 929 goto out;
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 931 case FMODE_READ:
88069f77
TM		 932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
6ee41268
TM		 934 break;
935 case FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
6ee41268
TM		 938 break;
939 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
6ee41268 942 }
dc0b027d 943out:
6ee41268
TM		 944 return ret;
945}
946
dc0b027d 947static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 948{
652f89f6
TM		 949 if (delegation == NULL)
950 return 0;
dc0b027d 951 if ((delegation->type & fmode) != fmode)
aac00a8d 952 return 0;
15c831bf 953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 954 return 0;
b7391f44 955 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 956 return 1;
957}
958
dc0b027d 959static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 960{
dc0b027d 961 switch (fmode) {
e7616923
TM		 962 case FMODE_WRITE:
963 state->n_wronly++;
964 break;
965 case FMODE_READ:
966 state->n_rdonly++;
967 break;
968 case FMODE_READ|FMODE_WRITE:
969 state->n_rdwr++;
970 }
dc0b027d 971 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 972}
973
dc0b027d 974static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 975{
976 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 977 nfs4_stateid_copy(&state->stateid, stateid);
978 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 979 switch (fmode) {
003707c7
TM		 980 case FMODE_READ:
981 set_bit(NFS_O_RDONLY_STATE, &state->flags);
982 break;
983 case FMODE_WRITE:
984 set_bit(NFS_O_WRONLY_STATE, &state->flags);
985 break;
986 case FMODE_READ|FMODE_WRITE:
987 set_bit(NFS_O_RDWR_STATE, &state->flags);
988 }
e7616923
TM		 989}
990
dc0b027d 991static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 992{
8bda4e4c 993 write_seqlock(&state->seqlock);
dc0b027d 994 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 995 write_sequnlock(&state->seqlock);
003707c7
TM		 996}
997
dc0b027d 998static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 999{
8bda4e4c
TM		 1000 /*
1001 * Protect the call to nfs4_state_set_mode_locked and
1002 * serialise the stateid update
1003 */
1004 write_seqlock(&state->seqlock);
003707c7 1005 if (deleg_stateid != NULL) {
f597c537 1006 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1007 set_bit(NFS_DELEGATED_STATE, &state->flags);
1008 }
1009 if (open_stateid != NULL)
dc0b027d 1010 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1011 write_sequnlock(&state->seqlock);
1012 spin_lock(&state->owner->so_lock);
dc0b027d 1013 update_open_stateflags(state, fmode);
ec073428 1014 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1015}
1016
dc0b027d 1017static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1018{
1019 struct nfs_inode *nfsi = NFS_I(state->inode);
1020 struct nfs_delegation *deleg_cur;
1021 int ret = 0;
1022
dc0b027d 1023 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1024
1025 rcu_read_lock();
1026 deleg_cur = rcu_dereference(nfsi->delegation);
1027 if (deleg_cur == NULL)
1028 goto no_delegation;
1029
1030 spin_lock(&deleg_cur->lock);
1031 if (nfsi->delegation != deleg_cur ||
dc0b027d 1032 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1033 goto no_delegation_unlock;
1034
1035 if (delegation == NULL)
1036 delegation = &deleg_cur->stateid;
f597c537 1037 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1038 goto no_delegation_unlock;
1039
b7391f44 1040 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1041 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1042 ret = 1;
1043no_delegation_unlock:
1044 spin_unlock(&deleg_cur->lock);
1045no_delegation:
1046 rcu_read_unlock();
1047
1048 if (!ret && open_stateid != NULL) {
dc0b027d 1049 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1050 ret = 1;
1051 }
1052
1053 return ret;
1054}
1055
1056
dc0b027d 1057static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1058{
1059 struct nfs_delegation *delegation;
1060
1061 rcu_read_lock();
1062 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1063 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1064 rcu_read_unlock();
1065 return;
1066 }
1067 rcu_read_unlock();
57ec14c5 1068 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1069}
1070
6ee41268 1071static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1072{
1073 struct nfs4_state *state = opendata->state;
1074 struct nfs_inode *nfsi = NFS_I(state->inode);
1075 struct nfs_delegation *delegation;
536e43d1 1076 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1077 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1078 nfs4_stateid stateid;
1079 int ret = -EAGAIN;
1080
aac00a8d 1081 for (;;) {
dc0b027d 1082 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1083 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1084 if (can_open_cached(state, fmode, open_mode)) {
1085 update_open_stateflags(state, fmode);
6ee41268 1086 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1087 goto out_return_state;
1088 }
1089 spin_unlock(&state->owner->so_lock);
1090 }
34310430
TM		 1091 rcu_read_lock();
1092 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1093 if (!can_open_delegated(delegation, fmode)) {
34310430 1094 rcu_read_unlock();
aac00a8d 1095 break;
34310430 1096 }
aac00a8d 1097 /* Save the delegation */
f597c537 1098 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1099 rcu_read_unlock();
af22f94a 1100 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1101 if (ret != 0)
1102 goto out;
1103 ret = -EAGAIN;
34310430
TM		 1104
1105 /* Try to update the stateid using the delegation */
dc0b027d 1106 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1107 goto out_return_state;
aac00a8d 1108 }
aac00a8d
TM		 1109out:
1110 return ERR_PTR(ret);
1111out_return_state:
1112 atomic_inc(&state->count);
1113 return state;
1114}
1115
24ac23ab
TM		 1116static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1117{
1118 struct inode *inode;
1119 struct nfs4_state *state = NULL;
003707c7 1120 struct nfs_delegation *delegation;
1b370bc2 1121 int ret;
24ac23ab 1122
aac00a8d 1123 if (!data->rpc_done) {
6ee41268 1124 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1125 goto out;
1126 }
1127
1b370bc2 1128 ret = -EAGAIN;
24ac23ab 1129 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1130 goto err;
24ac23ab 1131 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1132 ret = PTR_ERR(inode);
03f28e3a 1133 if (IS_ERR(inode))
1b370bc2
TM		 1134 goto err;
1135 ret = -ENOMEM;
24ac23ab
TM		 1136 state = nfs4_get_open_state(inode, data->owner);
1137 if (state == NULL)
1b370bc2 1138 goto err_put_inode;
549d6ed5 1139 if (data->o_res.delegation_type != 0) {
4e0038b6 1140 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1141 int delegation_flags = 0;
1142
003707c7
TM		 1143 rcu_read_lock();
1144 delegation = rcu_dereference(NFS_I(inode)->delegation);
1145 if (delegation)
1146 delegation_flags = delegation->flags;
1147 rcu_read_unlock();
652f89f6
TM		 1148 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1149 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1150 "returning a delegation for "
1151 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1152 clp->cl_hostname);
652f89f6 1153 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1154 nfs_inode_set_delegation(state->inode,
1155 data->owner->so_cred,
1156 &data->o_res);
1157 else
1158 nfs_inode_reclaim_delegation(state->inode,
1159 data->owner->so_cred,
1160 &data->o_res);
1161 }
34310430
TM		 1162
1163 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1164 data->o_arg.fmode);
24ac23ab 1165 iput(inode);
aac00a8d 1166out:
24ac23ab 1167 return state;
1b370bc2
TM		 1168err_put_inode:
1169 iput(inode);
1170err:
1171 return ERR_PTR(ret);
24ac23ab
TM		 1172}
1173
864472e9
TM		 1174static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1175{
1176 struct nfs_inode *nfsi = NFS_I(state->inode);
1177 struct nfs_open_context *ctx;
1178
1179 spin_lock(&state->inode->i_lock);
1180 list_for_each_entry(ctx, &nfsi->open_files, list) {
1181 if (ctx->state != state)
1182 continue;
1183 get_nfs_open_context(ctx);
1184 spin_unlock(&state->inode->i_lock);
1185 return ctx;
1186 }
1187 spin_unlock(&state->inode->i_lock);
1188 return ERR_PTR(-ENOENT);
1189}
1190
6f220ed5
TM		 1191static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1192{
1193 struct nfs4_opendata *opendata;
1194
3d4ff43d 1195 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1196 if (opendata == NULL)
1197 return ERR_PTR(-ENOMEM);
1198 opendata->state = state;
1199 atomic_inc(&state->count);
1200 return opendata;
1201}
1202
dc0b027d 1203static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1204{
2ced46c2 1205 struct nfs4_state *newstate;
864472e9
TM		 1206 int ret;
1207
dc0b027d
TM		 1208 opendata->o_arg.open_flags = 0;
1209 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1210 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1211 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1212 nfs4_init_opendata_res(opendata);
b257957e 1213 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1214 if (ret != 0)
1215 return ret;
2ced46c2 1216 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1217 if (IS_ERR(newstate))
1218 return PTR_ERR(newstate);
643168c2 1219 nfs4_close_state(newstate, fmode);
2ced46c2 1220 *res = newstate;
864472e9
TM		 1221 return 0;
1222}
1223
1224static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1225{
864472e9 1226 struct nfs4_state *newstate;
864472e9
TM		 1227 int ret;
1228
1229 /* memory barrier prior to reading state->n_* */
2ced46c2 1230 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1231 smp_rmb();
1232 if (state->n_rdwr != 0) {
b0ed9dbc 1233 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1234 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1235 if (ret != 0)
1236 return ret;
2ced46c2
TM		 1237 if (newstate != state)
1238 return -ESTALE;
864472e9
TM		 1239 }
1240 if (state->n_wronly != 0) {
b0ed9dbc 1241 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1242 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1243 if (ret != 0)
1244 return ret;
2ced46c2
TM		 1245 if (newstate != state)
1246 return -ESTALE;
864472e9
TM		 1247 }
1248 if (state->n_rdonly != 0) {
b0ed9dbc 1249 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1250 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1251 if (ret != 0)
1252 return ret;
2ced46c2
TM		 1253 if (newstate != state)
1254 return -ESTALE;
864472e9 1255 }
1ac7e2fd
TM		 1256 /*
1257 * We may have performed cached opens for all three recoveries.
1258 * Check if we need to update the current stateid.
1259 */
1260 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1261 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1262 write_seqlock(&state->seqlock);
1ac7e2fd 1263 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1264 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1265 write_sequnlock(&state->seqlock);
1ac7e2fd 1266 }
864472e9
TM		 1267 return 0;
1268}
1269
1da177e4
LT		 1270/*
1271 * OPEN_RECLAIM:
1272 * reclaim state on the server after a reboot.
1da177e4 1273 */
539cd03a 1274static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1275{
1ac7e2fd 1276 struct nfs_delegation *delegation;
864472e9 1277 struct nfs4_opendata *opendata;
dc0b027d 1278 fmode_t delegation_type = 0;
1da177e4
LT		 1279 int status;
1280
6f220ed5
TM		 1281 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1282 if (IS_ERR(opendata))
1283 return PTR_ERR(opendata);
864472e9
TM		 1284 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1285 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1286 rcu_read_lock();
1287 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1288 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1289 delegation_type = delegation->type;
1ac7e2fd 1290 rcu_read_unlock();
864472e9
TM		 1291 opendata->o_arg.u.delegation_type = delegation_type;
1292 status = nfs4_open_recover(opendata, state);
c6d00e63 1293 nfs4_opendata_put(opendata);
1da177e4
LT		 1294 return status;
1295}
1296
539cd03a 1297static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1298{
1299 struct nfs_server *server = NFS_SERVER(state->inode);
1300 struct nfs4_exception exception = { };
1301 int err;
1302 do {
539cd03a 1303 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1304 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1305 break;
1306 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1307 } while (exception.retry);
1308 return err;
1309}
1310
864472e9
TM		 1311static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1312{
1313 struct nfs_open_context *ctx;
1314 int ret;
1315
1316 ctx = nfs4_state_find_open_context(state);
1317 if (IS_ERR(ctx))
1318 return PTR_ERR(ctx);
539cd03a 1319 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1320 put_nfs_open_context(ctx);
1321 return ret;
1322}
1323
13437e12 1324static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1325{
e56e0b78 1326 struct nfs4_opendata *opendata;
864472e9 1327 int ret;
1da177e4 1328
6f220ed5
TM		 1329 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1330 if (IS_ERR(opendata))
1331 return PTR_ERR(opendata);
e56e0b78 1332 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1333 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1334 ret = nfs4_open_recover(opendata, state);
c6d00e63 1335 nfs4_opendata_put(opendata);
864472e9 1336 return ret;
1da177e4
LT		 1337}
1338
13437e12 1339int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1340{
1341 struct nfs4_exception exception = { };
539cd03a 1342 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1343 int err;
1344 do {
13437e12 1345 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1346 switch (err) {
1347 case 0:
965b5d67
TM		 1348 case -ENOENT:
1349 case -ESTALE:
1350 goto out;
bcfa49f6
RL		 1351 case -NFS4ERR_BADSESSION:
1352 case -NFS4ERR_BADSLOT:
1353 case -NFS4ERR_BAD_HIGH_SLOT:
1354 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1355 case -NFS4ERR_DEADSESSION:
9f594791 1356 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1357 goto out;
1da177e4
LT		 1358 case -NFS4ERR_STALE_CLIENTID:
1359 case -NFS4ERR_STALE_STATEID:
1360 case -NFS4ERR_EXPIRED:
1361 /* Don't recall a delegation if it was lost */
0400a6b0 1362 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1363 goto out;
1364 case -ERESTARTSYS:
1365 /*
1366 * The show must go on: exit, but mark the
1367 * stateid as needing recovery.
1368 */
a1d0b5ee 1369 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1370 case -NFS4ERR_ADMIN_REVOKED:
1371 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1372 nfs_inode_find_state_and_recover(state->inode,
1373 stateid);
0400a6b0 1374 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1375 case -EKEYEXPIRED:
1376 /*
1377 * User RPCSEC_GSS context has expired.
1378 * We cannot recover this stateid now, so
1379 * skip it and allow recovery thread to
1380 * proceed.
1381 */
965b5d67
TM		 1382 case -ENOMEM:
1383 err = 0;
1384 goto out;
1da177e4
LT		 1385 }
1386 err = nfs4_handle_exception(server, err, &exception);
1387 } while (exception.retry);
965b5d67 1388out:
1da177e4
LT		 1389 return err;
1390}
1391
cdd4e68b
TM		 1392static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1393{
1394 struct nfs4_opendata *data = calldata;
1395
1396 data->rpc_status = task->tk_status;
26e976a8 1397 if (data->rpc_status == 0) {
f597c537 1398 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1399 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1400 renew_lease(data->o_res.server, data->timestamp);
3e309914 1401 data->rpc_done = 1;
26e976a8 1402 }
cdd4e68b
TM		 1403}
1404
1405static void nfs4_open_confirm_release(void *calldata)
1406{
1407 struct nfs4_opendata *data = calldata;
1408 struct nfs4_state *state = NULL;
1409
1410 /* If this request hasn't been cancelled, do nothing */
1411 if (data->cancelled == 0)
1412 goto out_free;
1413 /* In case of error, no cleanup! */
3e309914 1414 if (!data->rpc_done)
cdd4e68b 1415 goto out_free;
cdd4e68b 1416 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1417 if (!IS_ERR(state))
643168c2 1418 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1419out_free:
c6d00e63 1420 nfs4_opendata_put(data);
cdd4e68b
TM		 1421}
1422
1423static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1424 .rpc_call_done = nfs4_open_confirm_done,
1425 .rpc_release = nfs4_open_confirm_release,
1426};
1427
1428/*
1429 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1430 */
1431static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1432{
1433 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1434 struct rpc_task *task;
5138fde0
TM		 1435 struct rpc_message msg = {
1436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1437 .rpc_argp = &data->c_arg,
1438 .rpc_resp = &data->c_res,
1439 .rpc_cred = data->owner->so_cred,
1440 };
c970aa85
TM		 1441 struct rpc_task_setup task_setup_data = {
1442 .rpc_client = server->client,
5138fde0 1443 .rpc_message = &msg,
c970aa85
TM		 1444 .callback_ops = &nfs4_open_confirm_ops,
1445 .callback_data = data,
101070ca 1446 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1447 .flags = RPC_TASK_ASYNC,
1448 };
1da177e4
LT		 1449 int status;
1450
c6d00e63 1451 kref_get(&data->kref);
3e309914
TM		 1452 data->rpc_done = 0;
1453 data->rpc_status = 0;
5138fde0 1454 data->timestamp = jiffies;
c970aa85 1455 task = rpc_run_task(&task_setup_data);
7a1218a2 1456 if (IS_ERR(task))
cdd4e68b 1457 return PTR_ERR(task);
cdd4e68b
TM		 1458 status = nfs4_wait_for_completion_rpc_task(task);
1459 if (status != 0) {
1460 data->cancelled = 1;
1461 smp_wmb();
1462 } else
1463 status = data->rpc_status;
e6b3c4db 1464 rpc_put_task(task);
1da177e4
LT		 1465 return status;
1466}
1467
24ac23ab 1468static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1469{
24ac23ab
TM		 1470 struct nfs4_opendata *data = calldata;
1471 struct nfs4_state_owner *sp = data->owner;
5138fde0 1472
24ac23ab
TM		 1473 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1474 return;
aac00a8d
TM		 1475 /*
1476 * Check if we still need to send an OPEN call, or if we can use
1477 * a delegation instead.
1478 */
1479 if (data->state != NULL) {
1480 struct nfs_delegation *delegation;
1481
dc0b027d 1482 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1483 goto out_no_action;
aac00a8d
TM		 1484 rcu_read_lock();
1485 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1486 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1487 can_open_delegated(delegation, data->o_arg.fmode))
1488 goto unlock_no_action;
aac00a8d
TM		 1489 rcu_read_unlock();
1490 }
95b72eb0 1491 /* Update client id. */
1f0e890d 1492 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1493 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1494 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1495 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1496 }
26e976a8 1497 data->timestamp = jiffies;
035168ab 1498 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1499 &data->o_arg.seq_args,
9d12b216 1500 &data->o_res.seq_res, task))
d898528c 1501 return;
5138fde0 1502 rpc_call_start(task);
6ee41268 1503 return;
652f89f6
TM		 1504unlock_no_action:
1505 rcu_read_unlock();
6ee41268
TM		 1506out_no_action:
1507 task->tk_action = NULL;
1508
24ac23ab 1509}
1da177e4 1510
b257957e
AB		 1511static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1512{
1513 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1514 nfs4_open_prepare(task, calldata);
1515}
1516
24ac23ab
TM		 1517static void nfs4_open_done(struct rpc_task *task, void *calldata)
1518{
1519 struct nfs4_opendata *data = calldata;
1da177e4 1520
24ac23ab 1521 data->rpc_status = task->tk_status;
d898528c 1522
14516c3a
TM		 1523 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1524 return;
d898528c 1525
24ac23ab
TM		 1526 if (task->tk_status == 0) {
1527 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1528 case S_IFREG:
1529 break;
1530 case S_IFLNK:
24ac23ab 1531 data->rpc_status = -ELOOP;
6f926b5b
TM		 1532 break;
1533 case S_IFDIR:
24ac23ab 1534 data->rpc_status = -EISDIR;
6f926b5b
TM		 1535 break;
1536 default:
24ac23ab 1537 data->rpc_status = -ENOTDIR;
6f926b5b 1538 }
26e976a8 1539 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1540 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1541 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1542 }
3e309914 1543 data->rpc_done = 1;
24ac23ab 1544}
6f926b5b 1545
24ac23ab
TM		 1546static void nfs4_open_release(void *calldata)
1547{
1548 struct nfs4_opendata *data = calldata;
1549 struct nfs4_state *state = NULL;
1550
1551 /* If this request hasn't been cancelled, do nothing */
1552 if (data->cancelled == 0)
1553 goto out_free;
1554 /* In case of error, no cleanup! */
3e309914 1555 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1556 goto out_free;
1557 /* In case we need an open_confirm, no cleanup! */
1558 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1559 goto out_free;
24ac23ab 1560 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1561 if (!IS_ERR(state))
643168c2 1562 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1563out_free:
c6d00e63 1564 nfs4_opendata_put(data);
24ac23ab
TM		 1565}
1566
1567static const struct rpc_call_ops nfs4_open_ops = {
1568 .rpc_call_prepare = nfs4_open_prepare,
1569 .rpc_call_done = nfs4_open_done,
1570 .rpc_release = nfs4_open_release,
1571};
1572
b257957e
AB		 1573static const struct rpc_call_ops nfs4_recover_open_ops = {
1574 .rpc_call_prepare = nfs4_recover_open_prepare,
1575 .rpc_call_done = nfs4_open_done,
1576 .rpc_release = nfs4_open_release,
1577};
1578
1579static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1580{
1581 struct inode *dir = data->dir->d_inode;
1582 struct nfs_server *server = NFS_SERVER(dir);
1583 struct nfs_openargs *o_arg = &data->o_arg;
1584 struct nfs_openres *o_res = &data->o_res;
1585 struct rpc_task *task;
5138fde0
TM		 1586 struct rpc_message msg = {
1587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1588 .rpc_argp = o_arg,
1589 .rpc_resp = o_res,
1590 .rpc_cred = data->owner->so_cred,
1591 };
c970aa85
TM		 1592 struct rpc_task_setup task_setup_data = {
1593 .rpc_client = server->client,
5138fde0 1594 .rpc_message = &msg,
c970aa85
TM		 1595 .callback_ops = &nfs4_open_ops,
1596 .callback_data = data,
101070ca 1597 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1598 .flags = RPC_TASK_ASYNC,
1599 };
24ac23ab
TM		 1600 int status;
1601
9d12b216 1602 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1603 kref_get(&data->kref);
3e309914
TM		 1604 data->rpc_done = 0;
1605 data->rpc_status = 0;
2ced46c2 1606 data->cancelled = 0;
b257957e
AB		 1607 if (isrecover)
1608 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1609 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1610 if (IS_ERR(task))
1611 return PTR_ERR(task);
1612 status = nfs4_wait_for_completion_rpc_task(task);
1613 if (status != 0) {
1614 data->cancelled = 1;
1615 smp_wmb();
1616 } else
1617 status = data->rpc_status;
1618 rpc_put_task(task);
1619
1620 return status;
1621}
1622
1623static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1624{
1625 struct inode *dir = data->dir->d_inode;
1626 struct nfs_openres *o_res = &data->o_res;
1627 int status;
1628
1629 status = nfs4_run_open_task(data, 1);
1630 if (status != 0 || !data->rpc_done)
1631 return status;
1632
6926afd1
TM		 1633 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1634
b257957e
AB		 1635 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1636 status = _nfs4_proc_open_confirm(data);
1637 if (status != 0)
1638 return status;
1639 }
1640
1641 return status;
1642}
1643
1644/*
1645 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1646 */
1647static int _nfs4_proc_open(struct nfs4_opendata *data)
1648{
1649 struct inode *dir = data->dir->d_inode;
1650 struct nfs_server *server = NFS_SERVER(dir);
1651 struct nfs_openargs *o_arg = &data->o_arg;
1652 struct nfs_openres *o_res = &data->o_res;
1653 int status;
1654
1655 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1656 if (!data->rpc_done)
1657 return status;
1658 if (status != 0) {
1659 if (status == -NFS4ERR_BADNAME &&
1660 !(o_arg->open_flags & O_CREAT))
1661 return -ENOENT;
24ac23ab 1662 return status;
08ef7bd3 1663 }
24ac23ab 1664
6926afd1
TM		 1665 nfs_fattr_map_and_free_names(server, &data->f_attr);
1666
90ff0c54 1667 if (o_arg->open_flags & O_CREAT)
56ae19f3 1668 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1669 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1670 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1671 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1672 status = _nfs4_proc_open_confirm(data);
1da177e4 1673 if (status != 0)
24ac23ab 1674 return status;
1da177e4
LT		 1675 }
1676 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1677 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1678 return 0;
1da177e4
LT		 1679}
1680
d83217c1 1681static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1682{
a78cb57a 1683 unsigned int loop;
6b30954e 1684 int ret;
58d9714a 1685
a78cb57a 1686 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1687 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1688 if (ret != 0)
a78cb57a 1689 break;
e598d843
TM		 1690 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1691 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1692 break;
0400a6b0 1693 nfs4_schedule_state_manager(clp);
a78cb57a 1694 ret = -EIO;
6b30954e 1695 }
a78cb57a 1696 return ret;
58d9714a
TM		 1697}
1698
d83217c1
AA		 1699static int nfs4_recover_expired_lease(struct nfs_server *server)
1700{
1701 return nfs4_client_recover_expired_lease(server->nfs_client);
1702}
1703
1da177e4
LT		 1704/*
1705 * OPEN_EXPIRED:
1706 * reclaim state on the server after a network partition.
1707 * Assumes caller holds the appropriate lock
1708 */
539cd03a 1709static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1710{
e56e0b78 1711 struct nfs4_opendata *opendata;
864472e9 1712 int ret;
1da177e4 1713
6f220ed5
TM		 1714 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1715 if (IS_ERR(opendata))
1716 return PTR_ERR(opendata);
864472e9 1717 ret = nfs4_open_recover(opendata, state);
35d05778 1718 if (ret == -ESTALE)
3d4ff43d 1719 d_drop(ctx->dentry);
c6d00e63 1720 nfs4_opendata_put(opendata);
864472e9 1721 return ret;
1da177e4
LT		 1722}
1723
a9ed2e25 1724static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1725{
539cd03a 1726 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1727 struct nfs4_exception exception = { };
1728 int err;
1729
1730 do {
539cd03a 1731 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1732 switch (err) {
1733 default:
1734 goto out;
1735 case -NFS4ERR_GRACE:
1736 case -NFS4ERR_DELAY:
1737 nfs4_handle_exception(server, err, &exception);
1738 err = 0;
1739 }
202b50dc 1740 } while (exception.retry);
a9ed2e25 1741out:
202b50dc
TM		 1742 return err;
1743}
1744
1da177e4
LT		 1745static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1746{
1da177e4 1747 struct nfs_open_context *ctx;
864472e9 1748 int ret;
1da177e4 1749
864472e9
TM		 1750 ctx = nfs4_state_find_open_context(state);
1751 if (IS_ERR(ctx))
1752 return PTR_ERR(ctx);
539cd03a 1753 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1754 put_nfs_open_context(ctx);
1755 return ret;
1da177e4
LT		 1756}
1757
f062eb6c 1758#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1759static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1760{
f062eb6c 1761 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1762 nfs4_stateid *stateid = &state->stateid;
1763 int status;
1764
1765 /* If a state reset has been done, test_stateid is unneeded */
1766 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1767 return;
1768
1769 status = nfs41_test_stateid(server, stateid);
1770 if (status != NFS_OK) {
1771 /* Free the stateid unless the server explicitly
1772 * informs us the stateid is unrecognized. */
1773 if (status != -NFS4ERR_BAD_STATEID)
1774 nfs41_free_stateid(server, stateid);
1775
1776 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1777 }
1778}
1779
1780/**
1781 * nfs41_check_open_stateid - possibly free an open stateid
1782 *
1783 * @state: NFSv4 state for an inode
1784 *
1785 * Returns NFS_OK if recovery for this stateid is now finished.
1786 * Otherwise a negative NFS4ERR value is returned.
1787 */
1788static int nfs41_check_open_stateid(struct nfs4_state *state)
1789{
1790 struct nfs_server *server = NFS_SERVER(state->inode);
1791 nfs4_stateid *stateid = &state->stateid;
1792 int status;
1793
1794 /* If a state reset has been done, test_stateid is unneeded */
1795 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1796 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1797 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1798 return -NFS4ERR_BAD_STATEID;
1799
1800 status = nfs41_test_stateid(server, stateid);
1801 if (status != NFS_OK) {
1802 /* Free the stateid unless the server explicitly
1803 * informs us the stateid is unrecognized. */
1804 if (status != -NFS4ERR_BAD_STATEID)
1805 nfs41_free_stateid(server, stateid);
1806
1807 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1808 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1809 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1810 }
1811 return status;
1812}
1813
1814static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1815{
eb64cf96 1816 int status;
b01dd1d8 1817
3e60ffdd
CL		 1818 nfs41_clear_delegation_stateid(state);
1819 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1820 if (status != NFS_OK)
1821 status = nfs4_open_expired(sp, state);
1822 return status;
f062eb6c
BS		 1823}
1824#endif
1825
aa53ed54
JL		 1826/*
1827 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1828 * fields corresponding to attributes that were used to store the verifier.
1829 * Make sure we clobber those fields in the later setattr call
1830 */
1831static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1832{
1833 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1834 !(sattr->ia_valid & ATTR_ATIME_SET))
1835 sattr->ia_valid |= ATTR_ATIME;
1836
1837 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1838 !(sattr->ia_valid & ATTR_MTIME_SET))
1839 sattr->ia_valid |= ATTR_MTIME;
1840}
1841
1da177e4 1842/*
24ac23ab 1843 * Returns a referenced nfs4_state
1da177e4 1844 */
82be417a
AA		 1845static int _nfs4_do_open(struct inode *dir,
1846 struct dentry *dentry,
1847 fmode_t fmode,
1848 int flags,
1849 struct iattr *sattr,
1850 struct rpc_cred *cred,
1851 struct nfs4_state **res,
1852 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1853{
1854 struct nfs4_state_owner *sp;
1855 struct nfs4_state *state = NULL;
1856 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1857 struct nfs4_opendata *opendata;
aac00a8d 1858 int status;
1da177e4
LT		 1859
1860 /* Protect against reboot recovery conflicts */
1da177e4 1861 status = -ENOMEM;
d1e284d5
TM		 1862 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1863 if (sp == NULL) {
1da177e4
LT		 1864 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1865 goto out_err;
1866 }
58d9714a
TM		 1867 status = nfs4_recover_expired_lease(server);
1868 if (status != 0)
b4454fe1 1869 goto err_put_state_owner;
82a2c1b7
AV		 1870 if (dentry->d_inode != NULL)
1871 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1872 status = -ENOMEM;
82a2c1b7 1873 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1874 if (opendata == NULL)
95d35cb4 1875 goto err_put_state_owner;
1da177e4 1876
82be417a
AA		 1877 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1878 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1879 if (!opendata->f_attr.mdsthreshold)
1880 goto err_opendata_put;
1549210f 1881 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1882 }
82a2c1b7
AV		 1883 if (dentry->d_inode != NULL)
1884 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1885
24ac23ab 1886 status = _nfs4_proc_open(opendata);
1da177e4 1887 if (status != 0)
c6d00e63 1888 goto err_opendata_put;
1da177e4 1889
24ac23ab 1890 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1891 status = PTR_ERR(state);
1892 if (IS_ERR(state))
c6d00e63 1893 goto err_opendata_put;
0df5dd4a 1894 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1895 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1896
1897 if (opendata->o_arg.open_flags & O_EXCL) {
1898 nfs4_exclusive_attrset(opendata, sattr);
1899
1900 nfs_fattr_init(opendata->o_res.f_attr);
1901 status = nfs4_do_setattr(state->inode, cred,
1902 opendata->o_res.f_attr, sattr,
1903 state);
1904 if (status == 0)
1905 nfs_setattr_update_inode(state->inode, sattr);
1906 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1907 }
82be417a
AA		 1908
1909 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1910 *ctx_th = opendata->f_attr.mdsthreshold;
1911 else
1912 kfree(opendata->f_attr.mdsthreshold);
1913 opendata->f_attr.mdsthreshold = NULL;
1914
c6d00e63 1915 nfs4_opendata_put(opendata);
1da177e4 1916 nfs4_put_state_owner(sp);
1da177e4
LT		 1917 *res = state;
1918 return 0;
c6d00e63 1919err_opendata_put:
82be417a 1920 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1921 nfs4_opendata_put(opendata);
e56e0b78
TM		 1922err_put_state_owner:
1923 nfs4_put_state_owner(sp);
1da177e4 1924out_err:
1da177e4
LT		 1925 *res = NULL;
1926 return status;
1927}
1928
1929
82be417a
AA		 1930static struct nfs4_state *nfs4_do_open(struct inode *dir,
1931 struct dentry *dentry,
1932 fmode_t fmode,
1933 int flags,
1934 struct iattr *sattr,
1935 struct rpc_cred *cred,
1936 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1937{
1938 struct nfs4_exception exception = { };
1939 struct nfs4_state *res;
1940 int status;
1941
2d0dbc6a 1942 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1943 do {
82be417a
AA		 1944 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1945 &res, ctx_th);
1da177e4
LT		 1946 if (status == 0)
1947 break;
1948 /* NOTE: BAD_SEQID means the server and client disagree about the
1949 * book-keeping w.r.t. state-changing operations
1950 * (OPEN/CLOSE/LOCK/LOCKU...)
1951 * It is actually a sign of a bug on the client or on the server.
1952 *
1953 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1954 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1955 * have unhashed the old state_owner for us, and that we can
1956 * therefore safely retry using a new one. We should still warn
1957 * the user though...
1958 */
1959 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1960 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1961 " returned a bad sequence-id error!\n",
1962 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1963 exception.retry = 1;
1964 continue;
1965 }
550f5747
TM		 1966 /*
1967 * BAD_STATEID on OPEN means that the server cancelled our
1968 * state before it received the OPEN_CONFIRM.
1969 * Recover by retrying the request as per the discussion
1970 * on Page 181 of RFC3530.
1971 */
1972 if (status == -NFS4ERR_BAD_STATEID) {
1973 exception.retry = 1;
1974 continue;
1975 }
aac00a8d
TM		 1976 if (status == -EAGAIN) {
1977 /* We must have found a delegation */
1978 exception.retry = 1;
1979 continue;
1980 }
1da177e4
LT		 1981 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1982 status, &exception));
1983 } while (exception.retry);
1984 return res;
1985}
1986
659bfcd6
TM		 1987static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1988 struct nfs_fattr *fattr, struct iattr *sattr,
1989 struct nfs4_state *state)
1da177e4 1990{
3e4f6290 1991 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1992 struct nfs_setattrargs arg = {
3e4f6290 1993 .fh = NFS_FH(inode),
1da177e4
LT		 1994 .iap = sattr,
1995 .server = server,
1996 .bitmask = server->attr_bitmask,
1997 };
1998 struct nfs_setattrres res = {
1999 .fattr = fattr,
2000 .server = server,
2001 };
2002 struct rpc_message msg = {
659bfcd6
TM		 2003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2004 .rpc_argp = &arg,
2005 .rpc_resp = &res,
2006 .rpc_cred = cred,
1da177e4 2007 };
26e976a8 2008 unsigned long timestamp = jiffies;
65e4308d 2009 int status;
1da177e4 2010
0e574af1 2011 nfs_fattr_init(fattr);
1da177e4 2012
4fc8796d
TM		 2013 if (state != NULL) {
2014 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2015 current->files, current->tgid);
2016 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2017 FMODE_WRITE)) {
3e4f6290 2018 /* Use that stateid */
08e9eac4 2019 } else
f597c537 2020 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2021
7c513058 2022 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2023 if (status == 0 && state != NULL)
2024 renew_lease(server, timestamp);
65e4308d 2025 return status;
1da177e4
LT		 2026}
2027
659bfcd6
TM		 2028static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2029 struct nfs_fattr *fattr, struct iattr *sattr,
2030 struct nfs4_state *state)
1da177e4 2031{
3e4f6290 2032 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2033 struct nfs4_exception exception = {
2034 .state = state,
3114ea7a 2035 .inode = inode,
a1d0b5ee 2036 };
1da177e4
LT		 2037 int err;
2038 do {
451146be
TM		 2039 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2040 switch (err) {
2041 case -NFS4ERR_OPENMODE:
2042 if (state && !(state->state & FMODE_WRITE)) {
2043 err = -EBADF;
2044 if (sattr->ia_valid & ATTR_OPEN)
2045 err = -EACCES;
2046 goto out;
2047 }
2048 }
2049 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2050 } while (exception.retry);
451146be 2051out:
1da177e4
LT		 2052 return err;
2053}
2054
2055struct nfs4_closedata {
2056 struct inode *inode;
2057 struct nfs4_state *state;
2058 struct nfs_closeargs arg;
2059 struct nfs_closeres res;
516a6af6 2060 struct nfs_fattr fattr;
26e976a8 2061 unsigned long timestamp;
f7e8917a
FI		 2062 bool roc;
2063 u32 roc_barrier;
1da177e4
LT		 2064};
2065
963d8fe5 2066static void nfs4_free_closedata(void *data)
9512135d 2067{
963d8fe5
TM		 2068 struct nfs4_closedata *calldata = data;
2069 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2070 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2071
f7e8917a
FI		 2072 if (calldata->roc)
2073 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2074 nfs4_put_open_state(calldata->state);
2075 nfs_free_seqid(calldata->arg.seqid);
9512135d 2076 nfs4_put_state_owner(sp);
643168c2 2077 nfs_sb_deactive(sb);
9512135d
TM		 2078 kfree(calldata);
2079}
2080
88069f77
TM		 2081static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2082 fmode_t fmode)
2083{
2084 spin_lock(&state->owner->so_lock);
2085 if (!(fmode & FMODE_READ))
2086 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2087 if (!(fmode & FMODE_WRITE))
2088 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2089 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2090 spin_unlock(&state->owner->so_lock);
2091}
2092
963d8fe5 2093static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2094{
963d8fe5 2095 struct nfs4_closedata *calldata = data;
1da177e4 2096 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2097 struct nfs_server *server = NFS_SERVER(calldata->inode);
2098
a3ca5651 2099 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2100 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2101 return;
1da177e4
LT		 2102 /* hmm. we are done with the inode, and in the process of freeing
2103 * the state_owner. we keep this around to process errors
2104 */
1da177e4
LT		 2105 switch (task->tk_status) {
2106 case 0:
f7e8917a
FI		 2107 if (calldata->roc)
2108 pnfs_roc_set_barrier(state->inode,
2109 calldata->roc_barrier);
45328c35 2110 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2111 renew_lease(server, calldata->timestamp);
88069f77
TM		 2112 nfs4_close_clear_stateid_flags(state,
2113 calldata->arg.fmode);
1da177e4
LT		 2114 break;
2115 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2116 case -NFS4ERR_OLD_STATEID:
2117 case -NFS4ERR_BAD_STATEID:
1da177e4 2118 case -NFS4ERR_EXPIRED:
dc0b027d 2119 if (calldata->arg.fmode == 0)
9e33bed5 2120 break;
1da177e4 2121 default:
72211dbe
TM		 2122 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2123 rpc_restart_call_prepare(task);
1da177e4 2124 }
72211dbe 2125 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2126 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2127 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2128}
2129
4ce70ada 2130static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2131{
4ce70ada 2132 struct nfs4_closedata *calldata = data;
9512135d 2133 struct nfs4_state *state = calldata->state;
88069f77 2134 int call_close = 0;
9512135d 2135
a3ca5651 2136 dprintk("%s: begin!\n", __func__);
963d8fe5 2137 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2138 return;
003707c7 2139
88069f77
TM		 2140 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2141 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2142 spin_lock(&state->owner->so_lock);
003707c7 2143 /* Calculate the change in open mode */
e7616923 2144 if (state->n_rdwr == 0) {
003707c7 2145 if (state->n_rdonly == 0) {
88069f77
TM		 2146 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2147 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2148 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2149 }
2150 if (state->n_wronly == 0) {
88069f77
TM		 2151 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2152 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2153 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2154 }
e7616923 2155 }
4cecb76f 2156 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2157
2158 if (!call_close) {
963d8fe5
TM		 2159 /* Note: exit _without_ calling nfs4_close_done */
2160 task->tk_action = NULL;
a3ca5651 2161 goto out;
9512135d 2162 }
88069f77 2163
f7e8917a 2164 if (calldata->arg.fmode == 0) {
88069f77 2165 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2166 if (calldata->roc &&
2167 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2168 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2169 task, NULL);
a3ca5651 2170 goto out;
f7e8917a
FI		 2171 }
2172 }
88069f77 2173
516a6af6 2174 nfs_fattr_init(calldata->res.fattr);
26e976a8 2175 calldata->timestamp = jiffies;
035168ab 2176 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2177 &calldata->arg.seq_args,
2178 &calldata->res.seq_res,
2179 task))
a3ca5651 2180 goto out;
5138fde0 2181 rpc_call_start(task);
a3ca5651
CL		 2182out:
2183 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2184}
2185
963d8fe5 2186static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2187 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2188 .rpc_call_done = nfs4_close_done,
2189 .rpc_release = nfs4_free_closedata,
2190};
2191
1da177e4
LT		 2192/*
2193 * It is possible for data to be read/written from a mem-mapped file
2194 * after the sys_close call (which hits the vfs layer as a flush).
2195 * This means that we can't safely call nfsv4 close on a file until
2196 * the inode is cleared. This in turn means that we are not good
2197 * NFSv4 citizens - we do not indicate to the server to update the file's
2198 * share state even when we are done with one of the three share
2199 * stateid's in the inode.
2200 *
2201 * NOTE: Caller must be holding the sp->so_owner semaphore!
2202 */
643168c2 2203int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2204{
4a35bd41 2205 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2206 struct nfs4_closedata *calldata;
b39e625b
TM		 2207 struct nfs4_state_owner *sp = state->owner;
2208 struct rpc_task *task;
5138fde0
TM		 2209 struct rpc_message msg = {
2210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2211 .rpc_cred = state->owner->so_cred,
2212 };
c970aa85
TM		 2213 struct rpc_task_setup task_setup_data = {
2214 .rpc_client = server->client,
5138fde0 2215 .rpc_message = &msg,
c970aa85 2216 .callback_ops = &nfs4_close_ops,
101070ca 2217 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2218 .flags = RPC_TASK_ASYNC,
2219 };
9512135d 2220 int status = -ENOMEM;
1da177e4 2221
8535b2be 2222 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2223 if (calldata == NULL)
9512135d 2224 goto out;
9d12b216 2225 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2226 calldata->inode = state->inode;
1da177e4 2227 calldata->state = state;
4a35bd41 2228 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2229 calldata->arg.stateid = &state->open_stateid;
1da177e4 2230 /* Serialization for the sequence id */
8535b2be 2231 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2232 if (calldata->arg.seqid == NULL)
2233 goto out_free_calldata;
dc0b027d 2234 calldata->arg.fmode = 0;
a65318bf 2235 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2236 calldata->res.fattr = &calldata->fattr;
c1d51931 2237 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2238 calldata->res.server = server;
f7e8917a 2239 calldata->roc = roc;
643168c2 2240 nfs_sb_active(calldata->inode->i_sb);
9512135d 2241
1174dd1f
TM		 2242 msg.rpc_argp = &calldata->arg;
2243 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2244 task_setup_data.callback_data = calldata;
2245 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2246 if (IS_ERR(task))
2247 return PTR_ERR(task);
a49c3c77
TM		 2248 status = 0;
2249 if (wait)
2250 status = rpc_wait_for_completion_task(task);
b39e625b 2251 rpc_put_task(task);
a49c3c77 2252 return status;
9512135d
TM		 2253out_free_calldata:
2254 kfree(calldata);
2255out:
f7e8917a
FI		 2256 if (roc)
2257 pnfs_roc_release(state->inode);
b39e625b
TM		 2258 nfs4_put_open_state(state);
2259 nfs4_put_state_owner(sp);
9512135d 2260 return status;
1da177e4
LT		 2261}
2262
2b484297 2263static struct inode *
cd9a1c0e 2264nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2265{
1da177e4 2266 struct nfs4_state *state;
1da177e4 2267
565277f6 2268 /* Protect against concurrent sillydeletes */
82be417a
AA		 2269 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2270 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2271 if (IS_ERR(state))
2272 return ERR_CAST(state);
cd9a1c0e 2273 ctx->state = state;
f46e0bd3 2274 return igrab(state->inode);
1da177e4
LT		 2275}
2276
1185a552 2277static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2278{
2279 if (ctx->state == NULL)
2280 return;
2281 if (is_sync)
643168c2 2282 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2283 else
643168c2 2284 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2285}
1da177e4
LT		 2286
2287static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2288{
43652ad5
BH		 2289 struct nfs4_server_caps_arg args = {
2290 .fhandle = fhandle,
2291 };
1da177e4
LT		 2292 struct nfs4_server_caps_res res = {};
2293 struct rpc_message msg = {
2294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2295 .rpc_argp = &args,
1da177e4
LT		 2296 .rpc_resp = &res,
2297 };
2298 int status;
2299
7c513058 2300 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2301 if (status == 0) {
2302 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2303 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2304 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2305 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2306 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2307 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2308 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2309 server->caps |= NFS_CAP_ACLS;
2310 if (res.has_links != 0)
2311 server->caps |= NFS_CAP_HARDLINKS;
2312 if (res.has_symlinks != 0)
2313 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2314 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2315 server->caps |= NFS_CAP_FILEID;
2316 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2317 server->caps |= NFS_CAP_MODE;
2318 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2319 server->caps |= NFS_CAP_NLINK;
2320 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2321 server->caps |= NFS_CAP_OWNER;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2323 server->caps |= NFS_CAP_OWNER_GROUP;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2325 server->caps |= NFS_CAP_ATIME;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2327 server->caps |= NFS_CAP_CTIME;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2329 server->caps |= NFS_CAP_MTIME;
2330
a65318bf
TM		 2331 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2332 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2333 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2334 server->acl_bitmask = res.acl_bitmask;
264e6351 2335 server->fh_expire_type = res.fh_expire_type;
1da177e4 2336 }
cccef3b9 2337
1da177e4
LT		 2338 return status;
2339}
2340
55a97593 2341int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2342{
2343 struct nfs4_exception exception = { };
2344 int err;
2345 do {
2346 err = nfs4_handle_exception(server,
2347 _nfs4_server_capabilities(server, fhandle),
2348 &exception);
2349 } while (exception.retry);
2350 return err;
2351}
2352
2353static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2354 struct nfs_fsinfo *info)
2355{
1da177e4
LT		 2356 struct nfs4_lookup_root_arg args = {
2357 .bitmask = nfs4_fattr_bitmap,
2358 };
2359 struct nfs4_lookup_res res = {
2360 .server = server,
0e574af1 2361 .fattr = info->fattr,
1da177e4
LT		 2362 .fh = fhandle,
2363 };
2364 struct rpc_message msg = {
2365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2366 .rpc_argp = &args,
2367 .rpc_resp = &res,
2368 };
008f55d0 2369
0e574af1 2370 nfs_fattr_init(info->fattr);
7c513058 2371 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2372}
2373
2374static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2375 struct nfs_fsinfo *info)
2376{
2377 struct nfs4_exception exception = { };
2378 int err;
2379 do {
fb8a5ba8
BS		 2380 err = _nfs4_lookup_root(server, fhandle, info);
2381 switch (err) {
2382 case 0:
2383 case -NFS4ERR_WRONGSEC:
05e9cfb4 2384 goto out;
fb8a5ba8
BS		 2385 default:
2386 err = nfs4_handle_exception(server, err, &exception);
2387 }
1da177e4 2388 } while (exception.retry);
05e9cfb4 2389out:
1da177e4
LT		 2390 return err;
2391}
2392
8f70e95f
BS		 2393static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2394 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2395{
2396 struct rpc_auth *auth;
2397 int ret;
2398
2399 auth = rpcauth_create(flavor, server->client);
2400 if (!auth) {
2401 ret = -EIO;
2402 goto out;
2403 }
2404 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2405out:
2406 return ret;
2407}
2408
801a16dc 2409static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2410 struct nfs_fsinfo *info)
1da177e4 2411{
8f70e95f 2412 int i, len, status = 0;
0fabee24 2413 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2414
801a16dc
BS		 2415 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2416 flav_array[len] = RPC_AUTH_NULL;
2417 len += 1;
8f70e95f
BS		 2418
2419 for (i = 0; i < len; i++) {
2420 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2421 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2422 continue;
2423 break;
8f70e95f 2424 }
fb8a5ba8
BS		 2425 /*
2426 * -EACCESS could mean that the user doesn't have correct permissions
2427 * to access the mount. It could also mean that we tried to mount
2428 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2429 * existing mount programs don't handle -EACCES very well so it should
2430 * be mapped to -EPERM instead.
2431 */
2432 if (status == -EACCES)
2433 status = -EPERM;
801a16dc
BS		 2434 return status;
2435}
2436
2437/*
2438 * get the file handle for the "/" directory on the server
2439 */
3028eb2b
BS		 2440int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2441 struct nfs_fsinfo *info)
801a16dc 2442{
fca78d6d 2443 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2444 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2445 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2446 /*
2447 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2448 * by nfs4_map_errors() as this function exits.
2449 */
fca78d6d 2450 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2451 if (status == 0)
2452 status = nfs4_server_capabilities(server, fhandle);
2453 if (status == 0)
2454 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2455 return nfs4_map_errors(status);
1da177e4
LT		 2456}
2457
bae36241
BS		 2458static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2459 struct nfs_fsinfo *info)
2460{
2461 int error;
2462 struct nfs_fattr *fattr = info->fattr;
2463
2464 error = nfs4_server_capabilities(server, mntfh);
2465 if (error < 0) {
2466 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2467 return error;
2468 }
2469
2470 error = nfs4_proc_getattr(server, mntfh, fattr);
2471 if (error < 0) {
2472 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2473 return error;
2474 }
2475
2476 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2477 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2478 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2479
2480 return error;
2481}
2482
6b97fd3d
MN		 2483/*
2484 * Get locations and (maybe) other attributes of a referral.
2485 * Note that we'll actually follow the referral later when
2486 * we detect fsid mismatch in inode revalidation
2487 */
f05d147f
BS		 2488static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2489 const struct qstr *name, struct nfs_fattr *fattr,
2490 struct nfs_fh *fhandle)
6b97fd3d
MN		 2491{
2492 int status = -ENOMEM;
2493 struct page *page = NULL;
2494 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2495
2496 page = alloc_page(GFP_KERNEL);
2497 if (page == NULL)
2498 goto out;
2499 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2500 if (locations == NULL)
2501 goto out;
2502
f05d147f 2503 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2504 if (status != 0)
2505 goto out;
2506 /* Make sure server returned a different fsid for the referral */
2507 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2508 dprintk("%s: server did not return a different fsid for"
2509 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2510 status = -EIO;
2511 goto out;
2512 }
533eb461
AA		 2513 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2514 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2515
533eb461 2516 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2517 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2518 memset(fhandle, 0, sizeof(struct nfs_fh));
2519out:
2520 if (page)
2521 __free_page(page);
5d7ca35a 2522 kfree(locations);
6b97fd3d
MN		 2523 return status;
2524}
2525
1da177e4
LT		 2526static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2527{
2528 struct nfs4_getattr_arg args = {
2529 .fh = fhandle,
2530 .bitmask = server->attr_bitmask,
2531 };
2532 struct nfs4_getattr_res res = {
2533 .fattr = fattr,
2534 .server = server,
2535 };
2536 struct rpc_message msg = {
2537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2538 .rpc_argp = &args,
2539 .rpc_resp = &res,
2540 };
2541
0e574af1 2542 nfs_fattr_init(fattr);
7c513058 2543 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2544}
2545
2546static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2547{
2548 struct nfs4_exception exception = { };
2549 int err;
2550 do {
2551 err = nfs4_handle_exception(server,
2552 _nfs4_proc_getattr(server, fhandle, fattr),
2553 &exception);
2554 } while (exception.retry);
2555 return err;
2556}
2557
2558/*
2559 * The file is not closed if it is opened due to the a request to change
2560 * the size of the file. The open call will not be needed once the
2561 * VFS layer lookup-intents are implemented.
2562 *
2563 * Close is called when the inode is destroyed.
2564 * If we haven't opened the file for O_WRONLY, we
2565 * need to in the size_change case to obtain a stateid.
2566 *
2567 * Got race?
2568 * Because OPEN is always done by name in nfsv4, it is
2569 * possible that we opened a different file by the same
2570 * name. We can recognize this race condition, but we
2571 * can't do anything about it besides returning an error.
2572 *
2573 * This will be fixed with VFS changes (lookup-intent).
2574 */
2575static int
2576nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2577 struct iattr *sattr)
2578{
08e9eac4 2579 struct inode *inode = dentry->d_inode;
659bfcd6 2580 struct rpc_cred *cred = NULL;
d530838b 2581 struct nfs4_state *state = NULL;
1da177e4
LT		 2582 int status;
2583
8a1636c4
BH		 2584 if (pnfs_ld_layoutret_on_setattr(inode))
2585 pnfs_return_layout(inode);
2586
0e574af1 2587 nfs_fattr_init(fattr);
1da177e4 2588
2669940d
AA		 2589 /* Deal with open(O_TRUNC) */
2590 if (sattr->ia_valid & ATTR_OPEN)
2591 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2592
2593 /* Optimization: if the end result is no change, don't RPC */
2594 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2595 return 0;
2596
d530838b 2597 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2598 if (sattr->ia_valid & ATTR_FILE) {
2599 struct nfs_open_context *ctx;
2600
2601 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2602 if (ctx) {
2603 cred = ctx->cred;
2604 state = ctx->state;
2605 }
659bfcd6 2606 }
08e9eac4 2607
659bfcd6 2608 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2609 if (status == 0)
2610 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2611 return status;
2612}
2613
0c2e53f1
TM		 2614static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2615 const struct qstr *name, struct nfs_fh *fhandle,
2616 struct nfs_fattr *fattr)
2b3de441 2617{
0c2e53f1 2618 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2619 int status;
2620 struct nfs4_lookup_arg args = {
2621 .bitmask = server->attr_bitmask,
0c2e53f1 2622 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2623 .name = name,
2624 };
2625 struct nfs4_lookup_res res = {
2626 .server = server,
2627 .fattr = fattr,
2628 .fh = fhandle,
2629 };
2630 struct rpc_message msg = {
2631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2632 .rpc_argp = &args,
2633 .rpc_resp = &res,
2634 };
2635
2636 nfs_fattr_init(fattr);
2637
1da177e4 2638 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2639 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2640 dprintk("NFS reply lookup: %d\n", status);
2641 return status;
2642}
2643
72de53ec 2644static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2645{
7ebb9315 2646 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2647 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2648 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2649 fattr->nlink = 2;
2650}
2651
72de53ec
BS		 2652static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2653 struct qstr *name, struct nfs_fh *fhandle,
2654 struct nfs_fattr *fattr)
1da177e4
LT		 2655{
2656 struct nfs4_exception exception = { };
72de53ec 2657 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2658 int err;
2659 do {
72de53ec
BS		 2660 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2661 switch (err) {
08ef7bd3 2662 case -NFS4ERR_BADNAME:
72de53ec
BS		 2663 err = -ENOENT;
2664 goto out;
0c2e53f1 2665 case -NFS4ERR_MOVED:
f05d147f 2666 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2667 goto out;
0c2e53f1 2668 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2669 err = -EPERM;
2670 if (client != *clnt)
2671 goto out;
2672
2673 client = nfs4_create_sec_client(client, dir, name);
2674 if (IS_ERR(client))
2675 return PTR_ERR(client);
2676
2677 exception.retry = 1;
2678 break;
2679 default:
2680 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2681 }
1da177e4 2682 } while (exception.retry);
72de53ec
BS		 2683
2684out:
2685 if (err == 0)
2686 *clnt = client;
2687 else if (client != *clnt)
2688 rpc_shutdown_client(client);
2689
1da177e4
LT		 2690 return err;
2691}
2692
80a16b21 2693static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2694 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2695{
2696 int status;
2697 struct rpc_clnt *client = NFS_CLIENT(dir);
2698
2699 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2700 if (client != NFS_CLIENT(dir)) {
2701 rpc_shutdown_client(client);
2702 nfs_fixup_secinfo_attributes(fattr);
2703 }
2704 return status;
2705}
2706
f05d147f
BS		 2707struct rpc_clnt *
2708nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2709 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2710{
2711 int status;
2712 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2713
2714 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2715 if (status < 0) {
2716 rpc_shutdown_client(client);
2717 return ERR_PTR(status);
2718 }
2719 return client;
2720}
2721
1da177e4
LT		 2722static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2723{
76b32999 2724 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2725 struct nfs4_accessargs args = {
2726 .fh = NFS_FH(inode),
a4980e78 2727 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2728 };
2729 struct nfs4_accessres res = {
2730 .server = server,
1da177e4 2731 };
1da177e4
LT		 2732 struct rpc_message msg = {
2733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2734 .rpc_argp = &args,
2735 .rpc_resp = &res,
2736 .rpc_cred = entry->cred,
2737 };
2738 int mode = entry->mask;
2739 int status;
2740
2741 /*
2742 * Determine which access bits we want to ask for...
2743 */
2744 if (mode & MAY_READ)
2745 args.access |= NFS4_ACCESS_READ;
2746 if (S_ISDIR(inode->i_mode)) {
2747 if (mode & MAY_WRITE)
2748 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2749 if (mode & MAY_EXEC)
2750 args.access |= NFS4_ACCESS_LOOKUP;
2751 } else {
2752 if (mode & MAY_WRITE)
2753 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2754 if (mode & MAY_EXEC)
2755 args.access |= NFS4_ACCESS_EXECUTE;
2756 }
c407d41a
TM		 2757
2758 res.fattr = nfs_alloc_fattr();
2759 if (res.fattr == NULL)
2760 return -ENOMEM;
2761
7c513058 2762 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2763 if (!status) {
2764 entry->mask = 0;
2765 if (res.access & NFS4_ACCESS_READ)
2766 entry->mask |= MAY_READ;
2767 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2768 entry->mask |= MAY_WRITE;
2769 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2770 entry->mask |= MAY_EXEC;
c407d41a 2771 nfs_refresh_inode(inode, res.fattr);
1da177e4 2772 }
c407d41a 2773 nfs_free_fattr(res.fattr);
1da177e4
LT		 2774 return status;
2775}
2776
2777static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2778{
2779 struct nfs4_exception exception = { };
2780 int err;
2781 do {
2782 err = nfs4_handle_exception(NFS_SERVER(inode),
2783 _nfs4_proc_access(inode, entry),
2784 &exception);
2785 } while (exception.retry);
2786 return err;
2787}
2788
2789/*
2790 * TODO: For the time being, we don't try to get any attributes
2791 * along with any of the zero-copy operations READ, READDIR,
2792 * READLINK, WRITE.
2793 *
2794 * In the case of the first three, we want to put the GETATTR
2795 * after the read-type operation -- this is because it is hard
2796 * to predict the length of a GETATTR response in v4, and thus
2797 * align the READ data correctly. This means that the GETATTR
2798 * may end up partially falling into the page cache, and we should
2799 * shift it into the 'tail' of the xdr_buf before processing.
2800 * To do this efficiently, we need to know the total length
2801 * of data received, which doesn't seem to be available outside
2802 * of the RPC layer.
2803 *
2804 * In the case of WRITE, we also want to put the GETATTR after
2805 * the operation -- in this case because we want to make sure
140150db 2806 * we get the post-operation mtime and size.
1da177e4
LT		 2807 *
2808 * Both of these changes to the XDR layer would in fact be quite
2809 * minor, but I decided to leave them for a subsequent patch.
2810 */
2811static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2812 unsigned int pgbase, unsigned int pglen)
2813{
2814 struct nfs4_readlink args = {
2815 .fh = NFS_FH(inode),
2816 .pgbase = pgbase,
2817 .pglen = pglen,
2818 .pages = &page,
2819 };
f50c7000 2820 struct nfs4_readlink_res res;
1da177e4
LT		 2821 struct rpc_message msg = {
2822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2823 .rpc_argp = &args,
f50c7000 2824 .rpc_resp = &res,
1da177e4
LT		 2825 };
2826
7c513058 2827 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2828}
2829
2830static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2831 unsigned int pgbase, unsigned int pglen)
2832{
2833 struct nfs4_exception exception = { };
2834 int err;
2835 do {
2836 err = nfs4_handle_exception(NFS_SERVER(inode),
2837 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2838 &exception);
2839 } while (exception.retry);
2840 return err;
2841}
2842
1da177e4 2843/*
8867fe58 2844 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2845 */
1da177e4
LT		 2846static int
2847nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2848 int flags)
1da177e4 2849{
8867fe58 2850 struct nfs_open_context *ctx;
1da177e4 2851 struct nfs4_state *state;
1da177e4
LT		 2852 int status = 0;
2853
8867fe58
MS		 2854 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2855 if (IS_ERR(ctx))
2856 return PTR_ERR(ctx);
2857
a8a5da99 2858 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2859 state = nfs4_do_open(dir, dentry, ctx->mode,
2860 flags, sattr, ctx->cred,
2861 &ctx->mdsthreshold);
d4d9cdcb 2862 d_drop(dentry);
1da177e4
LT		 2863 if (IS_ERR(state)) {
2864 status = PTR_ERR(state);
c0204fd2 2865 goto out;
1da177e4 2866 }
d4d9cdcb 2867 d_add(dentry, igrab(state->inode));
d75340cc 2868 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2869 ctx->state = state;
1da177e4 2870out:
8867fe58 2871 put_nfs_open_context(ctx);
1da177e4
LT		 2872 return status;
2873}
2874
2875static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2876{
16e42959 2877 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2878 struct nfs_removeargs args = {
1da177e4 2879 .fh = NFS_FH(dir),
26fe5750 2880 .name = *name,
16e42959 2881 };
4fdc17b2 2882 struct nfs_removeres res = {
16e42959 2883 .server = server,
1da177e4 2884 };
1da177e4 2885 struct rpc_message msg = {
4fdc17b2
TM		 2886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2887 .rpc_argp = &args,
2888 .rpc_resp = &res,
1da177e4 2889 };
778d2817 2890 int status;
1da177e4 2891
7c513058 2892 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2893 if (status == 0)
16e42959 2894 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2895 return status;
2896}
2897
2898static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2899{
2900 struct nfs4_exception exception = { };
2901 int err;
2902 do {
2903 err = nfs4_handle_exception(NFS_SERVER(dir),
2904 _nfs4_proc_remove(dir, name),
2905 &exception);
2906 } while (exception.retry);
2907 return err;
2908}
2909
e4eff1a6 2910static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2911{
e4eff1a6
TM		 2912 struct nfs_server *server = NFS_SERVER(dir);
2913 struct nfs_removeargs *args = msg->rpc_argp;
2914 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2915
e4eff1a6 2916 res->server = server;
1da177e4 2917 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2918 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2919}
2920
34e137cc
BS		 2921static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2922{
2923 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2924 &data->args.seq_args,
2925 &data->res.seq_res,
2926 task))
2927 return;
2928 rpc_call_start(task);
1da177e4
LT		 2929}
2930
e4eff1a6 2931static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2932{
e4eff1a6
TM		 2933 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2934
14516c3a
TM		 2935 if (!nfs4_sequence_done(task, &res->seq_res))
2936 return 0;
9e33bed5 2937 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2938 return 0;
2939 update_changeattr(dir, &res->cinfo);
e4eff1a6 2940 return 1;
1da177e4
LT		 2941}
2942
d3d4152a
JL		 2943static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2944{
2945 struct nfs_server *server = NFS_SERVER(dir);
2946 struct nfs_renameargs *arg = msg->rpc_argp;
2947 struct nfs_renameres *res = msg->rpc_resp;
2948
2949 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2950 res->server = server;
9d12b216 2951 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2952}
2953
c6bfa1a1
BS		 2954static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2955{
2956 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2957 &data->args.seq_args,
2958 &data->res.seq_res,
2959 task))
2960 return;
2961 rpc_call_start(task);
d3d4152a
JL		 2962}
2963
2964static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2965 struct inode *new_dir)
2966{
2967 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2968
2969 if (!nfs4_sequence_done(task, &res->seq_res))
2970 return 0;
2971 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2972 return 0;
2973
2974 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2975 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2976 return 1;
2977}
2978
1da177e4
LT		 2979static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2980 struct inode *new_dir, struct qstr *new_name)
2981{
6caf2c82 2982 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2983 struct nfs_renameargs arg = {
1da177e4
LT		 2984 .old_dir = NFS_FH(old_dir),
2985 .new_dir = NFS_FH(new_dir),
2986 .old_name = old_name,
2987 .new_name = new_name,
6caf2c82 2988 };
e8582a8b 2989 struct nfs_renameres res = {
6caf2c82 2990 .server = server,
1da177e4 2991 };
1da177e4
LT		 2992 struct rpc_message msg = {
2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2994 .rpc_argp = &arg,
2995 .rpc_resp = &res,
2996 };
011fff72 2997 int status = -ENOMEM;
1da177e4 2998
7c513058 2999 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3000 if (!status) {
3001 update_changeattr(old_dir, &res.old_cinfo);
3002 update_changeattr(new_dir, &res.new_cinfo);
3003 }
3004 return status;
3005}
3006
3007static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3008 struct inode *new_dir, struct qstr *new_name)
3009{
3010 struct nfs4_exception exception = { };
3011 int err;
3012 do {
3013 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3014 _nfs4_proc_rename(old_dir, old_name,
3015 new_dir, new_name),
3016 &exception);
3017 } while (exception.retry);
3018 return err;
3019}
3020
3021static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3022{
91ba2eee 3023 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3024 struct nfs4_link_arg arg = {
3025 .fh = NFS_FH(inode),
3026 .dir_fh = NFS_FH(dir),
3027 .name = name,
91ba2eee
TM		 3028 .bitmask = server->attr_bitmask,
3029 };
91ba2eee
TM		 3030 struct nfs4_link_res res = {
3031 .server = server,
1da177e4 3032 };
1da177e4
LT		 3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3035 .rpc_argp = &arg,
91ba2eee 3036 .rpc_resp = &res,
1da177e4 3037 };
136f2627
TM		 3038 int status = -ENOMEM;
3039
3040 res.fattr = nfs_alloc_fattr();
778d2817 3041 if (res.fattr == NULL)
136f2627 3042 goto out;
1da177e4 3043
7c513058 3044 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3045 if (!status) {
3046 update_changeattr(dir, &res.cinfo);
73a3d07c 3047 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3048 }
136f2627 3049out:
136f2627 3050 nfs_free_fattr(res.fattr);
1da177e4
LT		 3051 return status;
3052}
3053
3054static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3055{
3056 struct nfs4_exception exception = { };
3057 int err;
3058 do {
3059 err = nfs4_handle_exception(NFS_SERVER(inode),
3060 _nfs4_proc_link(inode, dir, name),
3061 &exception);
3062 } while (exception.retry);
3063 return err;
3064}
3065
57dc9a57
TM		 3066struct nfs4_createdata {
3067 struct rpc_message msg;
3068 struct nfs4_create_arg arg;
3069 struct nfs4_create_res res;
3070 struct nfs_fh fh;
3071 struct nfs_fattr fattr;
57dc9a57
TM		 3072};
3073
3074static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3075 struct qstr *name, struct iattr *sattr, u32 ftype)
3076{
3077 struct nfs4_createdata *data;
3078
3079 data = kzalloc(sizeof(*data), GFP_KERNEL);
3080 if (data != NULL) {
3081 struct nfs_server *server = NFS_SERVER(dir);
3082
3083 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3084 data->msg.rpc_argp = &data->arg;
3085 data->msg.rpc_resp = &data->res;
3086 data->arg.dir_fh = NFS_FH(dir);
3087 data->arg.server = server;
3088 data->arg.name = name;
3089 data->arg.attrs = sattr;
3090 data->arg.ftype = ftype;
3091 data->arg.bitmask = server->attr_bitmask;
3092 data->res.server = server;
3093 data->res.fh = &data->fh;
3094 data->res.fattr = &data->fattr;
57dc9a57 3095 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3096 }
3097 return data;
3098}
3099
3100static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3101{
7c513058 3102 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3103 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3104 if (status == 0) {
3105 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3106 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3107 }
3108 return status;
3109}
3110
3111static void nfs4_free_createdata(struct nfs4_createdata *data)
3112{
3113 kfree(data);
3114}
3115
4f390c15 3116static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3117 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3118{
57dc9a57
TM		 3119 struct nfs4_createdata *data;
3120 int status = -ENAMETOOLONG;
1da177e4 3121
94a6d753 3122 if (len > NFS4_MAXPATHLEN)
57dc9a57 3123 goto out;
4f390c15 3124
57dc9a57
TM		 3125 status = -ENOMEM;
3126 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3127 if (data == NULL)
3128 goto out;
3129
3130 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3131 data->arg.u.symlink.pages = &page;
3132 data->arg.u.symlink.len = len;
1da177e4 3133
57dc9a57
TM		 3134 status = nfs4_do_create(dir, dentry, data);
3135
3136 nfs4_free_createdata(data);
3137out:
1da177e4
LT		 3138 return status;
3139}
3140
4f390c15 3141static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3142 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3143{
3144 struct nfs4_exception exception = { };
3145 int err;
3146 do {
3147 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3148 _nfs4_proc_symlink(dir, dentry, page,
3149 len, sattr),
1da177e4
LT		 3150 &exception);
3151 } while (exception.retry);
3152 return err;
3153}
3154
3155static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3156 struct iattr *sattr)
3157{
57dc9a57
TM		 3158 struct nfs4_createdata *data;
3159 int status = -ENOMEM;
1da177e4 3160
57dc9a57
TM		 3161 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3162 if (data == NULL)
3163 goto out;
3164
3165 status = nfs4_do_create(dir, dentry, data);
3166
3167 nfs4_free_createdata(data);
3168out:
1da177e4
LT		 3169 return status;
3170}
3171
3172static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3173 struct iattr *sattr)
3174{
3175 struct nfs4_exception exception = { };
3176 int err;
a8a5da99
AK		 3177
3178 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3179 do {
3180 err = nfs4_handle_exception(NFS_SERVER(dir),
3181 _nfs4_proc_mkdir(dir, dentry, sattr),
3182 &exception);
3183 } while (exception.retry);
3184 return err;
3185}
3186
3187static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3188 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3189{
3190 struct inode *dir = dentry->d_inode;
3191 struct nfs4_readdir_arg args = {
3192 .fh = NFS_FH(dir),
56e4ebf8 3193 .pages = pages,
1da177e4
LT		 3194 .pgbase = 0,
3195 .count = count,
96d25e53 3196 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3197 .plus = plus,
1da177e4
LT		 3198 };
3199 struct nfs4_readdir_res res;
3200 struct rpc_message msg = {
3201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3202 .rpc_argp = &args,
3203 .rpc_resp = &res,
3204 .rpc_cred = cred,
3205 };
3206 int status;
3207
3110ff80 3208 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3209 dentry->d_parent->d_name.name,
3210 dentry->d_name.name,
3211 (unsigned long long)cookie);
1da177e4
LT		 3212 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3213 res.pgbase = args.pgbase;
7c513058 3214 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3215 if (status >= 0) {
1da177e4 3216 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3217 status += args.pgbase;
3218 }
c4812998
TM		 3219
3220 nfs_invalidate_atime(dir);
3221
3110ff80 3222 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3223 return status;
3224}
3225
3226static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3227 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3228{
3229 struct nfs4_exception exception = { };
3230 int err;
3231 do {
3232 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3233 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3234 pages, count, plus),
1da177e4
LT		 3235 &exception);
3236 } while (exception.retry);
3237 return err;
3238}
3239
3240static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3241 struct iattr *sattr, dev_t rdev)
3242{
57dc9a57
TM		 3243 struct nfs4_createdata *data;
3244 int mode = sattr->ia_mode;
3245 int status = -ENOMEM;
1da177e4
LT		 3246
3247 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3248 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3249
3250 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3251 if (data == NULL)
3252 goto out;
3253
1da177e4 3254 if (S_ISFIFO(mode))
57dc9a57 3255 data->arg.ftype = NF4FIFO;
1da177e4 3256 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3257 data->arg.ftype = NF4BLK;
3258 data->arg.u.device.specdata1 = MAJOR(rdev);
3259 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3260 }
3261 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3262 data->arg.ftype = NF4CHR;
3263 data->arg.u.device.specdata1 = MAJOR(rdev);
3264 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3265 }
1da177e4 3266
57dc9a57
TM		 3267 status = nfs4_do_create(dir, dentry, data);
3268
3269 nfs4_free_createdata(data);
3270out:
1da177e4
LT		 3271 return status;
3272}
3273
3274static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3275 struct iattr *sattr, dev_t rdev)
3276{
3277 struct nfs4_exception exception = { };
3278 int err;
a8a5da99
AK		 3279
3280 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3281 do {
3282 err = nfs4_handle_exception(NFS_SERVER(dir),
3283 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3284 &exception);
3285 } while (exception.retry);
3286 return err;
3287}
3288
3289static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3290 struct nfs_fsstat *fsstat)
3291{
3292 struct nfs4_statfs_arg args = {
3293 .fh = fhandle,
3294 .bitmask = server->attr_bitmask,
3295 };
24ad148a
BH		 3296 struct nfs4_statfs_res res = {
3297 .fsstat = fsstat,
3298 };
1da177e4
LT		 3299 struct rpc_message msg = {
3300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3301 .rpc_argp = &args,
24ad148a 3302 .rpc_resp = &res,
1da177e4
LT		 3303 };
3304
0e574af1 3305 nfs_fattr_init(fsstat->fattr);
7c513058 3306 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3307}
3308
3309static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3310{
3311 struct nfs4_exception exception = { };
3312 int err;
3313 do {
3314 err = nfs4_handle_exception(server,
3315 _nfs4_proc_statfs(server, fhandle, fsstat),
3316 &exception);
3317 } while (exception.retry);
3318 return err;
3319}
3320
3321static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3322 struct nfs_fsinfo *fsinfo)
3323{
3324 struct nfs4_fsinfo_arg args = {
3325 .fh = fhandle,
3326 .bitmask = server->attr_bitmask,
3327 };
3dda5e43
BH		 3328 struct nfs4_fsinfo_res res = {
3329 .fsinfo = fsinfo,
3330 };
1da177e4
LT		 3331 struct rpc_message msg = {
3332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3333 .rpc_argp = &args,
3dda5e43 3334 .rpc_resp = &res,
1da177e4
LT		 3335 };
3336
7c513058 3337 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3338}
3339
3340static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3341{
3342 struct nfs4_exception exception = { };
3343 int err;
3344
3345 do {
3346 err = nfs4_handle_exception(server,
3347 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3348 &exception);
3349 } while (exception.retry);
3350 return err;
3351}
3352
3353static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3354{
e38eb650
BS		 3355 int error;
3356
0e574af1 3357 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3358 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3359 if (error == 0)
3360 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3361
3362 return error;
1da177e4
LT		 3363}
3364
3365static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3366 struct nfs_pathconf *pathconf)
3367{
3368 struct nfs4_pathconf_arg args = {
3369 .fh = fhandle,
3370 .bitmask = server->attr_bitmask,
3371 };
d45b2989
BH		 3372 struct nfs4_pathconf_res res = {
3373 .pathconf = pathconf,
3374 };
1da177e4
LT		 3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3377 .rpc_argp = &args,
d45b2989 3378 .rpc_resp = &res,
1da177e4
LT		 3379 };
3380
3381 /* None of the pathconf attributes are mandatory to implement */
3382 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3383 memset(pathconf, 0, sizeof(*pathconf));
3384 return 0;
3385 }
3386
0e574af1 3387 nfs_fattr_init(pathconf->fattr);
7c513058 3388 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3389}
3390
3391static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3392 struct nfs_pathconf *pathconf)
3393{
3394 struct nfs4_exception exception = { };
3395 int err;
3396
3397 do {
3398 err = nfs4_handle_exception(server,
3399 _nfs4_proc_pathconf(server, fhandle, pathconf),
3400 &exception);
3401 } while (exception.retry);
3402 return err;
3403}
3404
d20581aa
BH		 3405void __nfs4_read_done_cb(struct nfs_read_data *data)
3406{
cd841605 3407 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3408}
3409
cbdabc7f 3410static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3411{
cd841605 3412 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3413
9e33bed5 3414 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3415 rpc_restart_call_prepare(task);
ec06c096 3416 return -EAGAIN;
1da177e4 3417 }
8850df99 3418
d20581aa 3419 __nfs4_read_done_cb(data);
1da177e4 3420 if (task->tk_status > 0)
ec06c096
TM		 3421 renew_lease(server, data->timestamp);
3422 return 0;
1da177e4
LT		 3423}
3424
cbdabc7f
AA		 3425static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3426{
3427
3428 dprintk("--> %s\n", __func__);
3429
3430 if (!nfs4_sequence_done(task, &data->res.seq_res))
3431 return -EAGAIN;
3432
d20581aa
BH		 3433 return data->read_done_cb ? data->read_done_cb(task, data) :
3434 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3435}
3436
bdc7f021 3437static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3438{
1da177e4 3439 data->timestamp = jiffies;
cbdabc7f 3440 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3441 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3442 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3443}
3444
ea7c3303
BS		 3445static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3446{
cd841605 3447 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3448 &data->args.seq_args,
3449 &data->res.seq_res,
3450 task))
3451 return;
3452 rpc_call_start(task);
1da177e4
LT		 3453}
3454
b029bc9b 3455static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3456{
cd841605 3457 struct inode *inode = data->header->inode;
1da177e4 3458
9e33bed5 3459 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3460 rpc_restart_call_prepare(task);
788e7a89 3461 return -EAGAIN;
1da177e4 3462 }
4f9838c7 3463 if (task->tk_status >= 0) {
1da177e4 3464 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3465 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3466 }
788e7a89 3467 return 0;
1da177e4
LT		 3468}
3469
b029bc9b
FI		 3470static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3471{
3472 if (!nfs4_sequence_done(task, &data->res.seq_res))
3473 return -EAGAIN;
d20581aa
BH		 3474 return data->write_done_cb ? data->write_done_cb(task, data) :
3475 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3476}
3477
5a37f851
TM		 3478static
3479bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3480{
5a37f851
TM		 3481 const struct nfs_pgio_header *hdr = data->header;
3482
3483 /* Don't request attributes for pNFS or O_DIRECT writes */
3484 if (data->ds_clp != NULL || hdr->dreq != NULL)
3485 return false;
3486 /* Otherwise, request attributes if and only if we don't hold
3487 * a delegation
3488 */
011e2a7f 3489 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3490}
a69aef14 3491
bdc7f021 3492static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3493{
cd841605 3494 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3495
5a37f851 3496 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3497 data->args.bitmask = NULL;
3498 data->res.fattr = NULL;
3499 } else
3500 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3501
b029bc9b
FI		 3502 if (!data->write_done_cb)
3503 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3504 data->res.server = server;
1da177e4
LT		 3505 data->timestamp = jiffies;
3506
bdc7f021 3507 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3508 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3509}
3510
c6cb80d0
BS		 3511static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3512{
cd841605 3513 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3514 &data->args.seq_args,
3515 &data->res.seq_res,
3516 task))
3517 return;
3518 rpc_call_start(task);
1da177e4
LT		 3519}
3520
0b7c0153 3521static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3522{
3523 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3524 &data->args.seq_args,
3525 &data->res.seq_res,
3526 task))
3527 return;
3528 rpc_call_start(task);
1da177e4
LT		 3529}
3530
0b7c0153 3531static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3532{
1da177e4 3533 struct inode *inode = data->inode;
14516c3a 3534
9e33bed5 3535 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3536 rpc_restart_call_prepare(task);
788e7a89 3537 return -EAGAIN;
1da177e4 3538 }
788e7a89 3539 return 0;
1da177e4
LT		 3540}
3541
0b7c0153 3542static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3543{
3544 if (!nfs4_sequence_done(task, &data->res.seq_res))
3545 return -EAGAIN;
0b7c0153 3546 return data->commit_done_cb(task, data);
5f452431
FI		 3547}
3548
0b7c0153 3549static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3550{
788e7a89 3551 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3552
0b7c0153
FI		 3553 if (data->commit_done_cb == NULL)
3554 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3555 data->res.server = server;
bdc7f021 3556 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3557 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3558}
3559
9bc4e3ca
CL		 3560struct nfs4_renewdata {
3561 struct nfs_client *client;
3562 unsigned long timestamp;
3563};
3564
1da177e4
LT		 3565/*
3566 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3567 * standalone procedure for queueing an asynchronous RENEW.
3568 */
9bc4e3ca 3569static void nfs4_renew_release(void *calldata)
dc96aef9 3570{
9bc4e3ca
CL		 3571 struct nfs4_renewdata *data = calldata;
3572 struct nfs_client *clp = data->client;
dc96aef9 3573
0851de06
AB		 3574 if (atomic_read(&clp->cl_count) > 1)
3575 nfs4_schedule_state_renewal(clp);
3576 nfs_put_client(clp);
9bc4e3ca 3577 kfree(data);
dc96aef9
AB		 3578}
3579
9bc4e3ca 3580static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3581{
9bc4e3ca
CL		 3582 struct nfs4_renewdata *data = calldata;
3583 struct nfs_client *clp = data->client;
3584 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3585
3586 if (task->tk_status < 0) {
95baa25c 3587 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3588 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3589 return;
3590 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3591 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3592 return;
3593 }
3594 nfs4_schedule_path_down_recovery(clp);
1da177e4 3595 }
452e9352 3596 do_renew_lease(clp, timestamp);
1da177e4
LT		 3597}
3598
963d8fe5
TM		 3599static const struct rpc_call_ops nfs4_renew_ops = {
3600 .rpc_call_done = nfs4_renew_done,
dc96aef9 3601 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3602};
3603
2f60ea6b 3604static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3605{
3606 struct rpc_message msg = {
3607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3608 .rpc_argp = clp,
b4454fe1 3609 .rpc_cred = cred,
1da177e4 3610 };
9bc4e3ca 3611 struct nfs4_renewdata *data;
1da177e4 3612
2f60ea6b
TM		 3613 if (renew_flags == 0)
3614 return 0;
0851de06
AB		 3615 if (!atomic_inc_not_zero(&clp->cl_count))
3616 return -EIO;
b569ad34 3617 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3618 if (data == NULL)
3619 return -ENOMEM;
3620 data->client = clp;
3621 data->timestamp = jiffies;
1da177e4 3622 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3623 &nfs4_renew_ops, data);
1da177e4
LT		 3624}
3625
8534d4ec 3626static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3627{
3628 struct rpc_message msg = {
3629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3630 .rpc_argp = clp,
b4454fe1 3631 .rpc_cred = cred,
1da177e4
LT		 3632 };
3633 unsigned long now = jiffies;
3634 int status;
3635
3636 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3637 if (status < 0)
3638 return status;
452e9352 3639 do_renew_lease(clp, now);
1da177e4
LT		 3640 return 0;
3641}
3642
aa1870af
BF		 3643static inline int nfs4_server_supports_acls(struct nfs_server *server)
3644{
3645 return (server->caps & NFS_CAP_ACLS)
3646 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3647 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3648}
3649
3650/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3651 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3652 * the stack.
3653 */
3654#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3655
e9e3d724
NH		 3656static int buf_to_pages_noslab(const void *buf, size_t buflen,
3657 struct page **pages, unsigned int *pgbase)
3658{
3659 struct page *newpage, **spages;
3660 int rc = 0;
3661 size_t len;
3662 spages = pages;
3663
3664 do {
43b7c3f0 3665 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3666 newpage = alloc_page(GFP_KERNEL);
3667
3668 if (newpage == NULL)
3669 goto unwind;
3670 memcpy(page_address(newpage), buf, len);
3671 buf += len;
3672 buflen -= len;
3673 *pages++ = newpage;
3674 rc++;
3675 } while (buflen != 0);
3676
3677 return rc;
3678
3679unwind:
3680 for(; rc > 0; rc--)
3681 __free_page(spages[rc-1]);
3682 return -ENOMEM;
3683}
3684
e50a1c2e
BF		 3685struct nfs4_cached_acl {
3686 int cached;
3687 size_t len;
3e9d4154 3688 char data[0];
e50a1c2e
BF		 3689};
3690
3691static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3692{
3693 struct nfs_inode *nfsi = NFS_I(inode);
3694
3695 spin_lock(&inode->i_lock);
3696 kfree(nfsi->nfs4_acl);
3697 nfsi->nfs4_acl = acl;
3698 spin_unlock(&inode->i_lock);
3699}
3700
3701static void nfs4_zap_acl_attr(struct inode *inode)
3702{
3703 nfs4_set_cached_acl(inode, NULL);
3704}
3705
3706static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3707{
3708 struct nfs_inode *nfsi = NFS_I(inode);
3709 struct nfs4_cached_acl *acl;
3710 int ret = -ENOENT;
3711
3712 spin_lock(&inode->i_lock);
3713 acl = nfsi->nfs4_acl;
3714 if (acl == NULL)
3715 goto out;
3716 if (buf == NULL) /* user is just asking for length */
3717 goto out_len;
3718 if (acl->cached == 0)
3719 goto out;
3720 ret = -ERANGE; /* see getxattr(2) man page */
3721 if (acl->len > buflen)
3722 goto out;
3723 memcpy(buf, acl->data, acl->len);
3724out_len:
3725 ret = acl->len;
3726out:
3727 spin_unlock(&inode->i_lock);
3728 return ret;
3729}
3730
5794d21e 3731static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3732{
3733 struct nfs4_cached_acl *acl;
3734
5794d21e 3735 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3736 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3737 if (acl == NULL)
3738 goto out;
3739 acl->cached = 1;
5794d21e 3740 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3741 } else {
3742 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3743 if (acl == NULL)
3744 goto out;
3745 acl->cached = 0;
3746 }
3747 acl->len = acl_len;
3748out:
3749 nfs4_set_cached_acl(inode, acl);
3750}
3751
bf118a34
AA		 3752/*
3753 * The getxattr API returns the required buffer length when called with a
3754 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3755 * the required buf. On a NULL buf, we send a page of data to the server
3756 * guessing that the ACL request can be serviced by a page. If so, we cache
3757 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3758 * the cache. If not so, we throw away the page, and cache the required
3759 * length. The next getxattr call will then produce another round trip to
3760 * the server, this time with the input buf of the required size.
3761 */
16b4289c 3762static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3763{
bf118a34 3764 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3765 struct nfs_getaclargs args = {
3766 .fh = NFS_FH(inode),
3767 .acl_pages = pages,
3768 .acl_len = buflen,
3769 };
663c79b3
BH		 3770 struct nfs_getaclres res = {
3771 .acl_len = buflen,
3772 };
aa1870af
BF		 3773 struct rpc_message msg = {
3774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3775 .rpc_argp = &args,
663c79b3 3776 .rpc_resp = &res,
aa1870af 3777 };
bf118a34 3778 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3779
bf118a34
AA		 3780 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3781 /* As long as we're doing a round trip to the server anyway,
3782 * let's be prepared for a page of acl data. */
3783 if (npages == 0)
3784 npages = 1;
3785
5a006899
SP		 3786 /* Add an extra page to handle the bitmap returned */
3787 npages++;
3788
bf118a34
AA		 3789 for (i = 0; i < npages; i++) {
3790 pages[i] = alloc_page(GFP_KERNEL);
3791 if (!pages[i])
3792 goto out_free;
e50a1c2e 3793 }
5a006899
SP		 3794
3795 /* for decoding across pages */
3796 res.acl_scratch = alloc_page(GFP_KERNEL);
3797 if (!res.acl_scratch)
3798 goto out_free;
3799
bf118a34
AA		 3800 args.acl_len = npages * PAGE_SIZE;
3801 args.acl_pgbase = 0;
5a006899 3802
bf118a34
AA		 3803 /* Let decode_getfacl know not to fail if the ACL data is larger than
3804 * the page we send as a guess */
3805 if (buf == NULL)
3806 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3807
de040bec 3808 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3809 __func__, buf, buflen, npages, args.acl_len);
3810 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3811 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3812 if (ret)
3813 goto out_free;
bf118a34
AA		 3814
3815 acl_len = res.acl_len - res.acl_data_offset;
3816 if (acl_len > args.acl_len)
5794d21e 3817 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3818 else
5794d21e 3819 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3820 acl_len);
e50a1c2e
BF		 3821 if (buf) {
3822 ret = -ERANGE;
bf118a34 3823 if (acl_len > buflen)
e50a1c2e 3824 goto out_free;
bf118a34 3825 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3826 acl_len);
e50a1c2e 3827 }
bf118a34 3828 ret = acl_len;
e50a1c2e 3829out_free:
bf118a34
AA		 3830 for (i = 0; i < npages; i++)
3831 if (pages[i])
3832 __free_page(pages[i]);
331818f1
TM		 3833 if (res.acl_scratch)
3834 __free_page(res.acl_scratch);
aa1870af
BF		 3835 return ret;
3836}
3837
16b4289c
TM		 3838static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3839{
3840 struct nfs4_exception exception = { };
3841 ssize_t ret;
3842 do {
3843 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3844 if (ret >= 0)
3845 break;
3846 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3847 } while (exception.retry);
3848 return ret;
3849}
3850
e50a1c2e
BF		 3851static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3852{
3853 struct nfs_server *server = NFS_SERVER(inode);
3854 int ret;
3855
3856 if (!nfs4_server_supports_acls(server))
3857 return -EOPNOTSUPP;
3858 ret = nfs_revalidate_inode(server, inode);
3859 if (ret < 0)
3860 return ret;
08a22b39
AK		 3861 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3862 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3863 ret = nfs4_read_cached_acl(inode, buf, buflen);
3864 if (ret != -ENOENT)
bf118a34
AA		 3865 /* -ENOENT is returned if there is no ACL or if there is an ACL
3866 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3867 return ret;
3868 return nfs4_get_acl_uncached(inode, buf, buflen);
3869}
3870
16b4289c 3871static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3872{
3873 struct nfs_server *server = NFS_SERVER(inode);
3874 struct page *pages[NFS4ACL_MAXPAGES];
3875 struct nfs_setaclargs arg = {
3876 .fh = NFS_FH(inode),
3877 .acl_pages = pages,
3878 .acl_len = buflen,
3879 };
73c403a9 3880 struct nfs_setaclres res;
4b580ee3
BF		 3881 struct rpc_message msg = {
3882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3883 .rpc_argp = &arg,
73c403a9 3884 .rpc_resp = &res,
4b580ee3 3885 };
e9e3d724 3886 int ret, i;
4b580ee3
BF		 3887
3888 if (!nfs4_server_supports_acls(server))
3889 return -EOPNOTSUPP;
e9e3d724
NH		 3890 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3891 if (i < 0)
3892 return i;
57ec14c5 3893 nfs4_inode_return_delegation(inode);
7c513058 3894 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3895
3896 /*
3897 * Free each page after tx, so the only ref left is
3898 * held by the network stack
3899 */
3900 for (; i > 0; i--)
3901 put_page(pages[i-1]);
3902
08a22b39
AK		 3903 /*
3904 * Acl update can result in inode attribute update.
3905 * so mark the attribute cache invalid.
3906 */
3907 spin_lock(&inode->i_lock);
3908 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3909 spin_unlock(&inode->i_lock);
f41f7418
TM		 3910 nfs_access_zap_cache(inode);
3911 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3912 return ret;
3913}
3914
16b4289c
TM		 3915static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3916{
3917 struct nfs4_exception exception = { };
3918 int err;
3919 do {
3920 err = nfs4_handle_exception(NFS_SERVER(inode),
3921 __nfs4_proc_set_acl(inode, buf, buflen),
3922 &exception);
3923 } while (exception.retry);
3924 return err;
3925}
3926
1da177e4 3927static int
aa5190d0 3928nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3929{
aa5190d0
TM		 3930 struct nfs_client *clp = server->nfs_client;
3931
3932 if (task->tk_status >= 0)
1da177e4
LT		 3933 return 0;
3934 switch(task->tk_status) {
a1d0b5ee 3935 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3936 case -NFS4ERR_ADMIN_REVOKED:
3937 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3938 if (state == NULL)
3939 break;
3940 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3941 case -NFS4ERR_OPENMODE:
3942 if (state == NULL)
3943 break;
0400a6b0
TM		 3944 nfs4_schedule_stateid_recovery(server, state);
3945 goto wait_on_recovery;
0ced63d1
TM		 3946 case -NFS4ERR_EXPIRED:
3947 if (state != NULL)
3948 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3949 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3950 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3951 nfs4_schedule_lease_recovery(clp);
3952 goto wait_on_recovery;
4745e315
AA		 3953#if defined(CONFIG_NFS_V4_1)
3954 case -NFS4ERR_BADSESSION:
3955 case -NFS4ERR_BADSLOT:
3956 case -NFS4ERR_BAD_HIGH_SLOT:
3957 case -NFS4ERR_DEADSESSION:
3958 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3959 case -NFS4ERR_SEQ_FALSE_RETRY:
3960 case -NFS4ERR_SEQ_MISORDERED:
3961 dprintk("%s ERROR %d, Reset session\n", __func__,
3962 task->tk_status);
9f594791 3963 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3964 task->tk_status = 0;
3965 return -EAGAIN;
3966#endif /* CONFIG_NFS_V4_1 */
1da177e4 3967 case -NFS4ERR_DELAY:
aa5190d0 3968 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3969 case -NFS4ERR_GRACE:
2c643488 3970 case -EKEYEXPIRED:
1da177e4
LT		 3971 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3972 task->tk_status = 0;
3973 return -EAGAIN;
a8a4ae3a 3974 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3975 case -NFS4ERR_OLD_STATEID:
3976 task->tk_status = 0;
3977 return -EAGAIN;
3978 }
3979 task->tk_status = nfs4_map_errors(task->tk_status);
3980 return 0;
0400a6b0 3981wait_on_recovery:
a2c0b9e2 3982 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3983 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3984 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3985 task->tk_status = 0;
3986 return -EAGAIN;
1da177e4
LT		 3987}
3988
f092075d
CL		 3989static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3990 nfs4_verifier *bootverf)
cd93710e
CL		 3991{
3992 __be32 verf[2];
3993
2c820d9a
CL		 3994 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3995 /* An impossible timestamp guarantees this value
3996 * will never match a generated boot time. */
3997 verf[0] = 0;
3998 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3999 } else {
f092075d
CL		 4000 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4001 verf[0] = (__be32)nn->boot_time.tv_sec;
4002 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4003 }
cd93710e
CL		 4004 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4005}
4006
bb8b27e5
TM		 4007int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4008 unsigned short port, struct rpc_cred *cred,
4009 struct nfs4_setclientid_res *res)
1da177e4
LT		 4010{
4011 nfs4_verifier sc_verifier;
4012 struct nfs4_setclientid setclientid = {
4013 .sc_verifier = &sc_verifier,
4014 .sc_prog = program,
f4eecd5d 4015 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4016 };
4017 struct rpc_message msg = {
4018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4019 .rpc_argp = &setclientid,
bb8b27e5 4020 .rpc_resp = res,
286d7d6a 4021 .rpc_cred = cred,
1da177e4 4022 };
1da177e4
LT		 4023 int loop = 0;
4024 int status;
4025
f092075d 4026 nfs4_init_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 4027
4028 for(;;) {
2446ab60 4029 rcu_read_lock();
1da177e4 4030 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 4031 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 4032 clp->cl_ipaddr,
4033 rpc_peeraddr2str(clp->cl_rpcclient,
4034 RPC_DISPLAY_ADDR),
69dd716c
TM		 4035 rpc_peeraddr2str(clp->cl_rpcclient,
4036 RPC_DISPLAY_PROTO),
78ea323b 4037 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 4038 clp->cl_id_uniquifier);
4039 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4040 sizeof(setclientid.sc_netid),
4041 rpc_peeraddr2str(clp->cl_rpcclient,
4042 RPC_DISPLAY_NETID));
1da177e4 4043 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4044 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 4045 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 4046 rcu_read_unlock();
1da177e4 4047
1bd714f2 4048 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4049 if (status != -NFS4ERR_CLID_INUSE)
4050 break;
fd954ae1
TM		 4051 if (loop != 0) {
4052 ++clp->cl_id_uniquifier;
1da177e4 4053 break;
fd954ae1
TM		 4054 }
4055 ++loop;
4056 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 4057 }
4058 return status;
4059}
4060
fd954ae1 4061int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4062 struct nfs4_setclientid_res *arg,
4063 struct rpc_cred *cred)
1da177e4
LT		 4064{
4065 struct nfs_fsinfo fsinfo;
4066 struct rpc_message msg = {
4067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4068 .rpc_argp = arg,
1da177e4 4069 .rpc_resp = &fsinfo,
286d7d6a 4070 .rpc_cred = cred,
1da177e4
LT		 4071 };
4072 unsigned long now;
4073 int status;
4074
4075 now = jiffies;
1bd714f2 4076 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4077 if (status == 0) {
4078 spin_lock(&clp->cl_lock);
4079 clp->cl_lease_time = fsinfo.lease_time * HZ;
4080 clp->cl_last_renewal = now;
4081 spin_unlock(&clp->cl_lock);
4082 }
4083 return status;
4084}
4085
fe650407
TM		 4086struct nfs4_delegreturndata {
4087 struct nfs4_delegreturnargs args;
fa178f29 4088 struct nfs4_delegreturnres res;
fe650407
TM		 4089 struct nfs_fh fh;
4090 nfs4_stateid stateid;
26e976a8 4091 unsigned long timestamp;
fa178f29 4092 struct nfs_fattr fattr;
fe650407
TM		 4093 int rpc_status;
4094};
4095
fe650407
TM		 4096static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4097{
4098 struct nfs4_delegreturndata *data = calldata;
938e1010 4099
14516c3a
TM		 4100 if (!nfs4_sequence_done(task, &data->res.seq_res))
4101 return;
938e1010 4102
79708861
RL		 4103 switch (task->tk_status) {
4104 case -NFS4ERR_STALE_STATEID:
4105 case -NFS4ERR_EXPIRED:
4106 case 0:
fa178f29 4107 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4108 break;
4109 default:
4110 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4111 -EAGAIN) {
d00c5d43 4112 rpc_restart_call_prepare(task);
79708861
RL		 4113 return;
4114 }
4115 }
4116 data->rpc_status = task->tk_status;
fe650407
TM		 4117}
4118
4119static void nfs4_delegreturn_release(void *calldata)
4120{
fe650407
TM		 4121 kfree(calldata);
4122}
4123
938e1010
AA		 4124#if defined(CONFIG_NFS_V4_1)
4125static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4126{
4127 struct nfs4_delegreturndata *d_data;
4128
4129 d_data = (struct nfs4_delegreturndata *)data;
4130
035168ab 4131 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4132 &d_data->args.seq_args,
9d12b216 4133 &d_data->res.seq_res, task))
938e1010
AA		 4134 return;
4135 rpc_call_start(task);
4136}
4137#endif /* CONFIG_NFS_V4_1 */
4138
c8d149f3 4139static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4140#if defined(CONFIG_NFS_V4_1)
4141 .rpc_call_prepare = nfs4_delegreturn_prepare,
4142#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4143 .rpc_call_done = nfs4_delegreturn_done,
4144 .rpc_release = nfs4_delegreturn_release,
4145};
4146
e6f81075 4147static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4148{
4149 struct nfs4_delegreturndata *data;
fa178f29 4150 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4151 struct rpc_task *task;
5138fde0
TM		 4152 struct rpc_message msg = {
4153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4154 .rpc_cred = cred,
4155 };
c970aa85
TM		 4156 struct rpc_task_setup task_setup_data = {
4157 .rpc_client = server->client,
5138fde0 4158 .rpc_message = &msg,
c970aa85
TM		 4159 .callback_ops = &nfs4_delegreturn_ops,
4160 .flags = RPC_TASK_ASYNC,
4161 };
e6f81075 4162 int status = 0;
fe650407 4163
8535b2be 4164 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4165 if (data == NULL)
4166 return -ENOMEM;
9d12b216 4167 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4168 data->args.fhandle = &data->fh;
4169 data->args.stateid = &data->stateid;
9e907fec 4170 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4171 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4172 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4173 data->res.fattr = &data->fattr;
4174 data->res.server = server;
5138fde0 4175 nfs_fattr_init(data->res.fattr);
26e976a8 4176 data->timestamp = jiffies;
fe650407
TM		 4177 data->rpc_status = 0;
4178
c970aa85 4179 task_setup_data.callback_data = data;
1174dd1f
TM		 4180 msg.rpc_argp = &data->args;
4181 msg.rpc_resp = &data->res;
c970aa85 4182 task = rpc_run_task(&task_setup_data);
7a1218a2 4183 if (IS_ERR(task))
fe650407 4184 return PTR_ERR(task);
e6f81075
TM		 4185 if (!issync)
4186 goto out;
fe650407 4187 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4188 if (status != 0)
4189 goto out;
4190 status = data->rpc_status;
e144cbcc
TM		 4191 if (status == 0)
4192 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4193 else
4194 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4195out:
e6b3c4db 4196 rpc_put_task(task);
fe650407 4197 return status;
1da177e4
LT		 4198}
4199
e6f81075 4200int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4201{
4202 struct nfs_server *server = NFS_SERVER(inode);
4203 struct nfs4_exception exception = { };
4204 int err;
4205 do {
e6f81075 4206 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4207 switch (err) {
4208 case -NFS4ERR_STALE_STATEID:
4209 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4210 case 0:
4211 return 0;
4212 }
4213 err = nfs4_handle_exception(server, err, &exception);
4214 } while (exception.retry);
4215 return err;
4216}
4217
4218#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4219#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4220
4221/*
4222 * sleep, with exponential backoff, and retry the LOCK operation.
4223 */
4224static unsigned long
4225nfs4_set_lock_task_retry(unsigned long timeout)
4226{
d310310c 4227 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4228 timeout <<= 1;
4229 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4230 return NFS4_LOCK_MAXTIMEOUT;
4231 return timeout;
4232}
4233
1da177e4
LT		 4234static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4235{
4236 struct inode *inode = state->inode;
4237 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4238 struct nfs_client *clp = server->nfs_client;
911d1aaf 4239 struct nfs_lockt_args arg = {
1da177e4 4240 .fh = NFS_FH(inode),
911d1aaf 4241 .fl = request,
1da177e4 4242 };
911d1aaf
TM		 4243 struct nfs_lockt_res res = {
4244 .denied = request,
1da177e4
LT		 4245 };
4246 struct rpc_message msg = {
4247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4248 .rpc_argp = &arg,
4249 .rpc_resp = &res,
4250 .rpc_cred = state->owner->so_cred,
4251 };
1da177e4
LT		 4252 struct nfs4_lock_state *lsp;
4253 int status;
4254
911d1aaf 4255 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4256 status = nfs4_set_lock_state(state, request);
4257 if (status != 0)
4258 goto out;
4259 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4260 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4261 arg.lock_owner.s_dev = server->s_dev;
7c513058 4262 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4263 switch (status) {
4264 case 0:
4265 request->fl_type = F_UNLCK;
4266 break;
4267 case -NFS4ERR_DENIED:
4268 status = 0;
1da177e4 4269 }
70cc6487 4270 request->fl_ops->fl_release_private(request);
8d0a8a9d 4271out:
1da177e4
LT		 4272 return status;
4273}
4274
4275static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4276{
4277 struct nfs4_exception exception = { };
4278 int err;
4279
4280 do {
4281 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4282 _nfs4_proc_getlk(state, cmd, request),
4283 &exception);
4284 } while (exception.retry);
4285 return err;
4286}
4287
4288static int do_vfs_lock(struct file *file, struct file_lock *fl)
4289{
4290 int res = 0;
4291 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4292 case FL_POSIX:
4293 res = posix_lock_file_wait(file, fl);
4294 break;
4295 case FL_FLOCK:
4296 res = flock_lock_file_wait(file, fl);
4297 break;
4298 default:
4299 BUG();
4300 }
1da177e4
LT		 4301 return res;
4302}
4303
faf5f49c 4304struct nfs4_unlockdata {
911d1aaf
TM		 4305 struct nfs_locku_args arg;
4306 struct nfs_locku_res res;
faf5f49c
TM		 4307 struct nfs4_lock_state *lsp;
4308 struct nfs_open_context *ctx;
911d1aaf
TM		 4309 struct file_lock fl;
4310 const struct nfs_server *server;
26e976a8 4311 unsigned long timestamp;
faf5f49c
TM		 4312};
4313
911d1aaf
TM		 4314static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4315 struct nfs_open_context *ctx,
4316 struct nfs4_lock_state *lsp,
4317 struct nfs_seqid *seqid)
4318{
4319 struct nfs4_unlockdata *p;
4320 struct inode *inode = lsp->ls_state->inode;
4321
8535b2be 4322 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4323 if (p == NULL)
4324 return NULL;
4325 p->arg.fh = NFS_FH(inode);
4326 p->arg.fl = &p->fl;
4327 p->arg.seqid = seqid;
c1d51931 4328 p->res.seqid = seqid;
911d1aaf
TM		 4329 p->arg.stateid = &lsp->ls_stateid;
4330 p->lsp = lsp;
4331 atomic_inc(&lsp->ls_count);
4332 /* Ensure we don't close file until we're done freeing locks! */
4333 p->ctx = get_nfs_open_context(ctx);
4334 memcpy(&p->fl, fl, sizeof(p->fl));
4335 p->server = NFS_SERVER(inode);
4336 return p;
4337}
4338
06f814a3 4339static void nfs4_locku_release_calldata(void *data)
faf5f49c 4340{
963d8fe5 4341 struct nfs4_unlockdata *calldata = data;
911d1aaf 4342 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4343 nfs4_put_lock_state(calldata->lsp);
4344 put_nfs_open_context(calldata->ctx);
4345 kfree(calldata);
faf5f49c
TM		 4346}
4347
963d8fe5 4348static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4349{
963d8fe5 4350 struct nfs4_unlockdata *calldata = data;
faf5f49c 4351
14516c3a
TM		 4352 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4353 return;
faf5f49c
TM		 4354 switch (task->tk_status) {
4355 case 0:
f597c537
TM		 4356 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4357 &calldata->res.stateid);
26e976a8 4358 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4359 break;
9e33bed5
TM		 4360 case -NFS4ERR_BAD_STATEID:
4361 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4362 case -NFS4ERR_STALE_STATEID:
4363 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4364 break;
4365 default:
9e33bed5 4366 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4367 rpc_restart_call_prepare(task);
faf5f49c 4368 }
faf5f49c
TM		 4369}
4370
4ce70ada 4371static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4372{
4ce70ada 4373 struct nfs4_unlockdata *calldata = data;
faf5f49c 4374
911d1aaf 4375 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4376 return;
4377 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4378 /* Note: exit _without_ running nfs4_locku_done */
4379 task->tk_action = NULL;
faf5f49c
TM		 4380 return;
4381 }
26e976a8 4382 calldata->timestamp = jiffies;
035168ab 4383 if (nfs4_setup_sequence(calldata->server,
a893693c 4384 &calldata->arg.seq_args,
9d12b216 4385 &calldata->res.seq_res, task))
a893693c 4386 return;
5138fde0 4387 rpc_call_start(task);
faf5f49c
TM		 4388}
4389
963d8fe5 4390static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4391 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4392 .rpc_call_done = nfs4_locku_done,
06f814a3 4393 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4394};
4395
a5d16a4d
TM		 4396static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4397 struct nfs_open_context *ctx,
4398 struct nfs4_lock_state *lsp,
4399 struct nfs_seqid *seqid)
4400{
4401 struct nfs4_unlockdata *data;
5138fde0
TM		 4402 struct rpc_message msg = {
4403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4404 .rpc_cred = ctx->cred,
4405 };
c970aa85
TM		 4406 struct rpc_task_setup task_setup_data = {
4407 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4408 .rpc_message = &msg,
c970aa85 4409 .callback_ops = &nfs4_locku_ops,
101070ca 4410 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4411 .flags = RPC_TASK_ASYNC,
4412 };
a5d16a4d 4413
137d6aca
FF		 4414 /* Ensure this is an unlock - when canceling a lock, the
4415 * canceled lock is passed in, and it won't be an unlock.
4416 */
4417 fl->fl_type = F_UNLCK;
4418
a5d16a4d
TM		 4419 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4420 if (data == NULL) {
4421 nfs_free_seqid(seqid);
4422 return ERR_PTR(-ENOMEM);
4423 }
4424
9d12b216 4425 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4426 msg.rpc_argp = &data->arg;
4427 msg.rpc_resp = &data->res;
c970aa85
TM		 4428 task_setup_data.callback_data = data;
4429 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4430}
4431
faf5f49c
TM		 4432static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4433{
19e03c57 4434 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4435 struct nfs_seqid *seqid;
1da177e4 4436 struct nfs4_lock_state *lsp;
06f814a3
TM		 4437 struct rpc_task *task;
4438 int status = 0;
536ff0f8 4439 unsigned char fl_flags = request->fl_flags;
faf5f49c 4440
8d0a8a9d 4441 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4442 /* Unlock _before_ we do the RPC call */
4443 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4444 down_read(&nfsi->rwsem);
4445 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4446 up_read(&nfsi->rwsem);
9b073574 4447 goto out;
19e03c57
TM		 4448 }
4449 up_read(&nfsi->rwsem);
8d0a8a9d 4450 if (status != 0)
9b073574
TM		 4451 goto out;
4452 /* Is this a delegated lock? */
4453 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4454 goto out;
8d0a8a9d 4455 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4456 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4457 status = -ENOMEM;
911d1aaf 4458 if (seqid == NULL)
9b073574 4459 goto out;
cd3758e3 4460 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4461 status = PTR_ERR(task);
4462 if (IS_ERR(task))
9b073574 4463 goto out;
a5d16a4d 4464 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4465 rpc_put_task(task);
9b073574 4466out:
536ff0f8 4467 request->fl_flags = fl_flags;
1da177e4
LT		 4468 return status;
4469}
4470
a5d16a4d
TM		 4471struct nfs4_lockdata {
4472 struct nfs_lock_args arg;
4473 struct nfs_lock_res res;
4474 struct nfs4_lock_state *lsp;
4475 struct nfs_open_context *ctx;
4476 struct file_lock fl;
26e976a8 4477 unsigned long timestamp;
a5d16a4d
TM		 4478 int rpc_status;
4479 int cancelled;
66179efe 4480 struct nfs_server *server;
a5d16a4d
TM		 4481};
4482
4483static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4484 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4485 gfp_t gfp_mask)
1da177e4 4486{
a5d16a4d
TM		 4487 struct nfs4_lockdata *p;
4488 struct inode *inode = lsp->ls_state->inode;
1da177e4 4489 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4490
8535b2be 4491 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4492 if (p == NULL)
4493 return NULL;
4494
4495 p->arg.fh = NFS_FH(inode);
4496 p->arg.fl = &p->fl;
8535b2be 4497 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4498 if (p->arg.open_seqid == NULL)
4499 goto out_free;
8535b2be 4500 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4501 if (p->arg.lock_seqid == NULL)
2f74c0a0 4502 goto out_free_seqid;
a5d16a4d 4503 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4504 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4505 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4506 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4507 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4508 p->lsp = lsp;
66179efe 4509 p->server = server;
a5d16a4d
TM		 4510 atomic_inc(&lsp->ls_count);
4511 p->ctx = get_nfs_open_context(ctx);
4512 memcpy(&p->fl, fl, sizeof(p->fl));
4513 return p;
2f74c0a0
TM		 4514out_free_seqid:
4515 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4516out_free:
4517 kfree(p);
4518 return NULL;
4519}
4520
4521static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4522{
4523 struct nfs4_lockdata *data = calldata;
4524 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4525
3110ff80 4526 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4527 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4528 return;
a5d16a4d
TM		 4529 /* Do we need to do an open_to_lock_owner? */
4530 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4531 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4532 return;
a5d16a4d
TM		 4533 data->arg.open_stateid = &state->stateid;
4534 data->arg.new_lock_owner = 1;
c1d51931 4535 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4536 } else
4537 data->arg.new_lock_owner = 0;
26e976a8 4538 data->timestamp = jiffies;
035168ab
TM		 4539 if (nfs4_setup_sequence(data->server,
4540 &data->arg.seq_args,
9d12b216 4541 &data->res.seq_res, task))
66179efe 4542 return;
5138fde0 4543 rpc_call_start(task);
3110ff80 4544 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4545}
4546
b257957e
AB		 4547static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4548{
4549 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4550 nfs4_lock_prepare(task, calldata);
4551}
4552
a5d16a4d
TM		 4553static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4554{
4555 struct nfs4_lockdata *data = calldata;
4556
3110ff80 4557 dprintk("%s: begin!\n", __func__);
a5d16a4d 4558
14516c3a
TM		 4559 if (!nfs4_sequence_done(task, &data->res.seq_res))
4560 return;
66179efe 4561
a5d16a4d 4562 data->rpc_status = task->tk_status;
a5d16a4d 4563 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4564 if (data->rpc_status == 0)
4565 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4566 else
4567 goto out;
4568 }
4569 if (data->rpc_status == 0) {
f597c537 4570 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4571 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4572 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4573 }
a5d16a4d 4574out:
3110ff80 4575 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4576}
4577
4578static void nfs4_lock_release(void *calldata)
4579{
4580 struct nfs4_lockdata *data = calldata;
4581
3110ff80 4582 dprintk("%s: begin!\n", __func__);
2f74c0a0 4583 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4584 if (data->cancelled != 0) {
4585 struct rpc_task *task;
4586 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4587 data->arg.lock_seqid);
4588 if (!IS_ERR(task))
bf294b41 4589 rpc_put_task_async(task);
3110ff80 4590 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4591 } else
4592 nfs_free_seqid(data->arg.lock_seqid);
4593 nfs4_put_lock_state(data->lsp);
4594 put_nfs_open_context(data->ctx);
4595 kfree(data);
3110ff80 4596 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4597}
4598
4599static const struct rpc_call_ops nfs4_lock_ops = {
4600 .rpc_call_prepare = nfs4_lock_prepare,
4601 .rpc_call_done = nfs4_lock_done,
4602 .rpc_release = nfs4_lock_release,
4603};
4604
b257957e
AB		 4605static const struct rpc_call_ops nfs4_recover_lock_ops = {
4606 .rpc_call_prepare = nfs4_recover_lock_prepare,
4607 .rpc_call_done = nfs4_lock_done,
4608 .rpc_release = nfs4_lock_release,
4609};
4610
2bee72a6
TM		 4611static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4612{
2bee72a6
TM		 4613 switch (error) {
4614 case -NFS4ERR_ADMIN_REVOKED:
4615 case -NFS4ERR_BAD_STATEID:
ecac799a 4616 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4617 if (new_lock_owner != 0 ||
4618 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4619 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4620 break;
4621 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4622 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4623 case -NFS4ERR_EXPIRED:
4624 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4625 };
4626}
4627
afe6c27c 4628static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4629{
4630 struct nfs4_lockdata *data;
4631 struct rpc_task *task;
5138fde0
TM		 4632 struct rpc_message msg = {
4633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4634 .rpc_cred = state->owner->so_cred,
4635 };
c970aa85
TM		 4636 struct rpc_task_setup task_setup_data = {
4637 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4638 .rpc_message = &msg,
c970aa85 4639 .callback_ops = &nfs4_lock_ops,
101070ca 4640 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4641 .flags = RPC_TASK_ASYNC,
4642 };
a5d16a4d
TM		 4643 int ret;
4644
3110ff80 4645 dprintk("%s: begin!\n", __func__);
cd3758e3 4646 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4647 fl->fl_u.nfs4_fl.owner,
4648 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4649 if (data == NULL)
4650 return -ENOMEM;
4651 if (IS_SETLKW(cmd))
4652 data->arg.block = 1;
b257957e
AB		 4653 if (recovery_type > NFS_LOCK_NEW) {
4654 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4655 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4656 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4657 }
9d12b216 4658 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4659 msg.rpc_argp = &data->arg;
4660 msg.rpc_resp = &data->res;
c970aa85
TM		 4661 task_setup_data.callback_data = data;
4662 task = rpc_run_task(&task_setup_data);
7a1218a2 4663 if (IS_ERR(task))
a5d16a4d 4664 return PTR_ERR(task);
a5d16a4d
TM		 4665 ret = nfs4_wait_for_completion_rpc_task(task);
4666 if (ret == 0) {
4667 ret = data->rpc_status;
2bee72a6
TM		 4668 if (ret)
4669 nfs4_handle_setlk_error(data->server, data->lsp,
4670 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4671 } else
4672 data->cancelled = 1;
e6b3c4db 4673 rpc_put_task(task);
3110ff80 4674 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4675 return ret;
1da177e4
LT		 4676}
4677
4678static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4679{
202b50dc 4680 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4681 struct nfs4_exception exception = {
4682 .inode = state->inode,
4683 };
202b50dc
TM		 4684 int err;
4685
4686 do {
42a2d13e
TM		 4687 /* Cache the lock if possible... */
4688 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4689 return 0;
afe6c27c 4690 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4691 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4692 break;
4693 nfs4_handle_exception(server, err, &exception);
4694 } while (exception.retry);
4695 return err;
1da177e4
LT		 4696}
4697
4698static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4699{
202b50dc 4700 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4701 struct nfs4_exception exception = {
4702 .inode = state->inode,
4703 };
202b50dc
TM		 4704 int err;
4705
6bfc93ef
TM		 4706 err = nfs4_set_lock_state(state, request);
4707 if (err != 0)
4708 return err;
202b50dc 4709 do {
42a2d13e
TM		 4710 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4711 return 0;
afe6c27c 4712 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4713 switch (err) {
4714 default:
4715 goto out;
4716 case -NFS4ERR_GRACE:
4717 case -NFS4ERR_DELAY:
4718 nfs4_handle_exception(server, err, &exception);
4719 err = 0;
4720 }
202b50dc 4721 } while (exception.retry);
a9ed2e25 4722out:
202b50dc 4723 return err;
1da177e4
LT		 4724}
4725
f062eb6c 4726#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4727/**
4728 * nfs41_check_expired_locks - possibly free a lock stateid
4729 *
4730 * @state: NFSv4 state for an inode
4731 *
4732 * Returns NFS_OK if recovery for this stateid is now finished.
4733 * Otherwise a negative NFS4ERR value is returned.
4734 */
b01dd1d8 4735static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4736{
eb64cf96 4737 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4738 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4739 struct nfs_server *server = NFS_SERVER(state->inode);
4740
b01dd1d8
BS		 4741 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4742 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4743 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4744 if (status != NFS_OK) {
3e60ffdd
CL		 4745 /* Free the stateid unless the server
4746 * informs us the stateid is unrecognized. */
89af2739
CL		 4747 if (status != -NFS4ERR_BAD_STATEID)
4748 nfs41_free_stateid(server,
4749 &lsp->ls_stateid);
b01dd1d8
BS		 4750 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4751 ret = status;
4752 }
4753 }
4754 };
4755
4756 return ret;
4757}
4758
4759static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4760{
4761 int status = NFS_OK;
4762
4763 if (test_bit(LK_STATE_IN_USE, &state->flags))
4764 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4765 if (status != NFS_OK)
4766 status = nfs4_lock_expired(state, request);
4767 return status;
f062eb6c
BS		 4768}
4769#endif
4770
1da177e4
LT		 4771static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4772{
19e03c57 4773 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4774 unsigned char fl_flags = request->fl_flags;
8e469ebd 4775 int status = -ENOLCK;
1da177e4 4776
8e469ebd
TM		 4777 if ((fl_flags & FL_POSIX) &&
4778 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4779 goto out;
6bfc93ef 4780 /* Is this a delegated open? */
6bfc93ef
TM		 4781 status = nfs4_set_lock_state(state, request);
4782 if (status != 0)
4783 goto out;
01c3b861
TM		 4784 request->fl_flags |= FL_ACCESS;
4785 status = do_vfs_lock(request->fl_file, request);
4786 if (status < 0)
4787 goto out;
19e03c57 4788 down_read(&nfsi->rwsem);
01c3b861 4789 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4790 /* Yes: cache locks! */
01c3b861 4791 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4792 request->fl_flags = fl_flags & ~FL_SLEEP;
4793 status = do_vfs_lock(request->fl_file, request);
4794 goto out_unlock;
01c3b861 4795 }
afe6c27c 4796 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4797 if (status != 0)
01c3b861 4798 goto out_unlock;
6bfc93ef 4799 /* Note: we always want to sleep here! */
01c3b861 4800 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4801 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4802 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4803 "manager!\n", __func__);
01c3b861 4804out_unlock:
19e03c57 4805 up_read(&nfsi->rwsem);
01c3b861
TM		 4806out:
4807 request->fl_flags = fl_flags;
1da177e4
LT		 4808 return status;
4809}
4810
4811static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4812{
a1d0b5ee
TM		 4813 struct nfs4_exception exception = {
4814 .state = state,
05ffe24f 4815 .inode = state->inode,
a1d0b5ee 4816 };
1da177e4
LT		 4817 int err;
4818
4819 do {
965b5d67
TM		 4820 err = _nfs4_proc_setlk(state, cmd, request);
4821 if (err == -NFS4ERR_DENIED)
4822 err = -EAGAIN;
1da177e4 4823 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4824 err, &exception);
1da177e4
LT		 4825 } while (exception.retry);
4826 return err;
4827}
4828
4829static int
4830nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4831{
4832 struct nfs_open_context *ctx;
4833 struct nfs4_state *state;
4834 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4835 int status;
4836
4837 /* verify open state */
cd3758e3 4838 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4839 state = ctx->state;
4840
4841 if (request->fl_start < 0 || request->fl_end < 0)
4842 return -EINVAL;
4843
d953126a
TM		 4844 if (IS_GETLK(cmd)) {
4845 if (state != NULL)
4846 return nfs4_proc_getlk(state, F_GETLK, request);
4847 return 0;
4848 }
1da177e4
LT		 4849
4850 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4851 return -EINVAL;
4852
d953126a
TM		 4853 if (request->fl_type == F_UNLCK) {
4854 if (state != NULL)
4855 return nfs4_proc_unlck(state, cmd, request);
4856 return 0;
4857 }
1da177e4 4858
d953126a
TM		 4859 if (state == NULL)
4860 return -ENOLCK;
55725513
TM		 4861 /*
4862 * Don't rely on the VFS having checked the file open mode,
4863 * since it won't do this for flock() locks.
4864 */
4865 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4866 case F_RDLCK:
4867 if (!(filp->f_mode & FMODE_READ))
4868 return -EBADF;
4869 break;
4870 case F_WRLCK:
4871 if (!(filp->f_mode & FMODE_WRITE))
4872 return -EBADF;
4873 }
4874
1da177e4
LT		 4875 do {
4876 status = nfs4_proc_setlk(state, cmd, request);
4877 if ((status != -EAGAIN) || IS_SETLK(cmd))
4878 break;
4879 timeout = nfs4_set_lock_task_retry(timeout);
4880 status = -ERESTARTSYS;
4881 if (signalled())
4882 break;
4883 } while(status < 0);
1da177e4
LT		 4884 return status;
4885}
4886
888e694c
TM		 4887int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4888{
4889 struct nfs_server *server = NFS_SERVER(state->inode);
4890 struct nfs4_exception exception = { };
4891 int err;
4892
4893 err = nfs4_set_lock_state(state, fl);
4894 if (err != 0)
4895 goto out;
4896 do {
afe6c27c 4897 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4898 switch (err) {
4899 default:
a030889a
WAA		 4900 printk(KERN_ERR "NFS: %s: unhandled error "
4901 "%d.\n", __func__, err);
d5122201 4902 case 0:
965b5d67 4903 case -ESTALE:
d5122201
TM		 4904 goto out;
4905 case -NFS4ERR_EXPIRED:
0ced63d1 4906 nfs4_schedule_stateid_recovery(server, state);
d5122201 4907 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4908 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4909 nfs4_schedule_lease_recovery(server->nfs_client);
4910 goto out;
74e7bb73
RL		 4911 case -NFS4ERR_BADSESSION:
4912 case -NFS4ERR_BADSLOT:
4913 case -NFS4ERR_BAD_HIGH_SLOT:
4914 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4915 case -NFS4ERR_DEADSESSION:
9f594791 4916 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4917 goto out;
965b5d67
TM		 4918 case -ERESTARTSYS:
4919 /*
4920 * The show must go on: exit, but mark the
4921 * stateid as needing recovery.
4922 */
a1d0b5ee 4923 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4924 case -NFS4ERR_ADMIN_REVOKED:
4925 case -NFS4ERR_BAD_STATEID:
4926 case -NFS4ERR_OPENMODE:
0400a6b0 4927 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4928 err = 0;
4929 goto out;
168667c4
TM		 4930 case -EKEYEXPIRED:
4931 /*
4932 * User RPCSEC_GSS context has expired.
4933 * We cannot recover this stateid now, so
4934 * skip it and allow recovery thread to
4935 * proceed.
4936 */
4937 err = 0;
4938 goto out;
965b5d67
TM		 4939 case -ENOMEM:
4940 case -NFS4ERR_DENIED:
4941 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4942 err = 0;
4943 goto out;
d5122201
TM		 4944 case -NFS4ERR_DELAY:
4945 break;
4946 }
888e694c
TM		 4947 err = nfs4_handle_exception(server, err, &exception);
4948 } while (exception.retry);
4949out:
4950 return err;
4951}
6b3b5496 4952
cf470c3e
TM		 4953struct nfs_release_lockowner_data {
4954 struct nfs4_lock_state *lsp;
5ae67c4f 4955 struct nfs_server *server;
cf470c3e
TM		 4956 struct nfs_release_lockowner_args args;
4957};
4958
d3c7b7cc
TM		 4959static void nfs4_release_lockowner_release(void *calldata)
4960{
cf470c3e 4961 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4962 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4963 kfree(calldata);
4964}
4965
17280175 4966static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4967 .rpc_release = nfs4_release_lockowner_release,
4968};
4969
cf470c3e 4970int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4971{
4972 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4973 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4974 struct rpc_message msg = {
4975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4976 };
4977
4978 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4979 return -EINVAL;
4980 data = kmalloc(sizeof(*data), GFP_NOFS);
4981 if (!data)
4982 return -ENOMEM;
4983 data->lsp = lsp;
5ae67c4f 4984 data->server = server;
cf470c3e
TM		 4985 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4986 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4987 data->args.lock_owner.s_dev = server->s_dev;
4988 msg.rpc_argp = &data->args;
4989 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4990 return 0;
d3c7b7cc
TM		 4991}
4992
aa1870af
BF		 4993#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4994
64c2ce8b
AK		 4995static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4996 const void *buf, size_t buflen,
4997 int flags, int type)
6b3b5496 4998{
64c2ce8b
AK		 4999 if (strcmp(key, "") != 0)
5000 return -EINVAL;
4b580ee3 5001
64c2ce8b 5002 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5003}
5004
64c2ce8b
AK		 5005static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5006 void *buf, size_t buflen, int type)
6b3b5496 5007{
64c2ce8b
AK		 5008 if (strcmp(key, "") != 0)
5009 return -EINVAL;
aa1870af 5010
64c2ce8b 5011 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5012}
5013
64c2ce8b
AK		 5014static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5015 size_t list_len, const char *name,
5016 size_t name_len, int type)
6b3b5496 5017{
64c2ce8b 5018 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5019
096455a2
BF		 5020 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5021 return 0;
64c2ce8b
AK		 5022
5023 if (list && len <= list_len)
5024 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5025 return len;
6b3b5496
BF		 5026}
5027
533eb461
AA		 5028/*
5029 * nfs_fhget will use either the mounted_on_fileid or the fileid
5030 */
69aaaae1
TM		 5031static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5032{
533eb461
AA		 5033 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5034 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5035 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5036 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5037 return;
5038
5039 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5040 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5041 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5042 fattr->nlink = 2;
5043}
5044
f05d147f
BS		 5045static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5046 const struct qstr *name,
5047 struct nfs4_fs_locations *fs_locations,
5048 struct page *page)
683b57b4
TM		 5049{
5050 struct nfs_server *server = NFS_SERVER(dir);
5051 u32 bitmask[2] = {
361e624f 5052 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5053 };
5054 struct nfs4_fs_locations_arg args = {
5055 .dir_fh = NFS_FH(dir),
c228fd3a 5056 .name = name,
683b57b4
TM		 5057 .page = page,
5058 .bitmask = bitmask,
5059 };
22958463
BH		 5060 struct nfs4_fs_locations_res res = {
5061 .fs_locations = fs_locations,
5062 };
683b57b4
TM		 5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5065 .rpc_argp = &args,
22958463 5066 .rpc_resp = &res,
683b57b4
TM		 5067 };
5068 int status;
5069
3110ff80 5070 dprintk("%s: start\n", __func__);
533eb461
AA		 5071
5072 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5073 * is not supported */
5074 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5075 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5076 else
5077 bitmask[0] |= FATTR4_WORD0_FILEID;
5078
c228fd3a 5079 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5080 fs_locations->server = server;
830b8e33 5081 fs_locations->nlocations = 0;
f05d147f 5082 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5083 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5084 return status;
5085}
5086
f05d147f
BS		 5087int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5088 const struct qstr *name,
5089 struct nfs4_fs_locations *fs_locations,
5090 struct page *page)
db0a9593
BS		 5091{
5092 struct nfs4_exception exception = { };
5093 int err;
5094 do {
5095 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5096 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5097 &exception);
5098 } while (exception.retry);
5099 return err;
5100}
5101
5a5ea0d4
BS		 5102static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5103{
5104 int status;
5105 struct nfs4_secinfo_arg args = {
5106 .dir_fh = NFS_FH(dir),
5107 .name = name,
5108 };
5109 struct nfs4_secinfo_res res = {
5110 .flavors = flavors,
5111 };
5112 struct rpc_message msg = {
5113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5114 .rpc_argp = &args,
5115 .rpc_resp = &res,
5116 };
5117
5118 dprintk("NFS call secinfo %s\n", name->name);
5119 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5120 dprintk("NFS reply secinfo: %d\n", status);
5121 return status;
5122}
5123
72de53ec
BS		 5124int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5125 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5126{
5127 struct nfs4_exception exception = { };
5128 int err;
5129 do {
5130 err = nfs4_handle_exception(NFS_SERVER(dir),
5131 _nfs4_proc_secinfo(dir, name, flavors),
5132 &exception);
5133 } while (exception.retry);
5134 return err;
5135}
5136
557134a3 5137#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5138/*
5139 * Check the exchange flags returned by the server for invalid flags, having
5140 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5141 * DS flags set.
5142 */
5143static int nfs4_check_cl_exchange_flags(u32 flags)
5144{
5145 if (flags & ~EXCHGID4_FLAG_MASK_R)
5146 goto out_inval;
5147 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5148 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5149 goto out_inval;
5150 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5151 goto out_inval;
5152 return NFS_OK;
5153out_inval:
5154 return -NFS4ERR_INVAL;
5155}
5156
78fe0f41 5157static bool
79d4e1f0
CL		 5158nfs41_same_server_scope(struct nfs41_server_scope *a,
5159 struct nfs41_server_scope *b)
78fe0f41
WAA		 5160{
5161 if (a->server_scope_sz == b->server_scope_sz &&
5162 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5163 return true;
5164
5165 return false;
5166}
5167
7c44f1ae
WAA		 5168/*
5169 * nfs4_proc_bind_conn_to_session()
5170 *
5171 * The 4.1 client currently uses the same TCP connection for the
5172 * fore and backchannel.
5173 */
2cf047c9 5174int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5175{
5176 int status;
5177 struct nfs41_bind_conn_to_session_res res;
5178 struct rpc_message msg = {
5179 .rpc_proc =
5180 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5181 .rpc_argp = clp,
5182 .rpc_resp = &res,
2cf047c9 5183 .rpc_cred = cred,
7c44f1ae
WAA		 5184 };
5185
5186 dprintk("--> %s\n", __func__);
5187 BUG_ON(clp == NULL);
5188
5189 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5190 if (unlikely(res.session == NULL)) {
5191 status = -ENOMEM;
5192 goto out;
5193 }
5194
5195 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5196 if (status == 0) {
5197 if (memcmp(res.session->sess_id.data,
5198 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5199 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5200 status = -EIO;
5201 goto out_session;
5202 }
5203 if (res.dir != NFS4_CDFS4_BOTH) {
5204 dprintk("NFS: %s: Unexpected direction from server\n",
5205 __func__);
5206 status = -EIO;
5207 goto out_session;
5208 }
5209 if (res.use_conn_in_rdma_mode) {
5210 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5211 __func__);
5212 status = -EIO;
5213 goto out_session;
5214 }
5215 }
5216out_session:
5217 kfree(res.session);
5218out:
5219 dprintk("<-- %s status= %d\n", __func__, status);
5220 return status;
5221}
5222
99fe60d0
BH		 5223/*
5224 * nfs4_proc_exchange_id()
5225 *
5226 * Since the clientid has expired, all compounds using sessions
5227 * associated with the stale clientid will be returning
5228 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5229 * be in some phase of session reset.
5230 */
4d643d1d 5231int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5232{
5233 nfs4_verifier verifier;
5234 struct nfs41_exchange_id_args args = {
cd93710e 5235 .verifier = &verifier,
99fe60d0 5236 .client = clp,
357f54d6 5237 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5238 };
5239 struct nfs41_exchange_id_res res = {
32b01310 5240 0
99fe60d0
BH		 5241 };
5242 int status;
5243 struct rpc_message msg = {
5244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5245 .rpc_argp = &args,
5246 .rpc_resp = &res,
5247 .rpc_cred = cred,
5248 };
99fe60d0
BH		 5249
5250 dprintk("--> %s\n", __func__);
5251 BUG_ON(clp == NULL);
a7b72103 5252
f092075d 5253 nfs4_init_boot_verifier(clp, &verifier);
99fe60d0 5254
c7a360b0 5255 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5256 "%s/%s/%u",
c7a360b0 5257 clp->cl_ipaddr,
3617e503 5258 clp->cl_rpcclient->cl_nodename,
c7a360b0 5259 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5260
acdeb69d 5261 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5262 GFP_NOFS);
acdeb69d 5263 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5264 status = -ENOMEM;
5265 goto out;
5266 }
78fe0f41 5267
79d4e1f0 5268 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5269 GFP_NOFS);
177313f1 5270 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5271 status = -ENOMEM;
acdeb69d 5272 goto out_server_owner;
abe9a6d5 5273 }
78fe0f41 5274
bbafffd2 5275 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5276 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5277 status = -ENOMEM;
5278 goto out_server_scope;
5279 }
5280
1bd714f2 5281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5282 if (status == 0)
32b01310 5283 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5284
acdeb69d 5285 if (status == 0) {
32b01310
TM		 5286 clp->cl_clientid = res.clientid;
5287 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5288 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5289 clp->cl_seqid = res.seqid;
5290
acdeb69d
CL		 5291 kfree(clp->cl_serverowner);
5292 clp->cl_serverowner = res.server_owner;
5293 res.server_owner = NULL;
78fe0f41 5294
7d2ed9ac 5295 /* use the most recent implementation id */
59155546
CL		 5296 kfree(clp->cl_implid);
5297 clp->cl_implid = res.impl_id;
7d2ed9ac 5298
177313f1 5299 if (clp->cl_serverscope != NULL &&
79d4e1f0 5300 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5301 res.server_scope)) {
5302 dprintk("%s: server_scope mismatch detected\n",
5303 __func__);
5304 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5305 kfree(clp->cl_serverscope);
5306 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5307 }
5308
177313f1 5309 if (clp->cl_serverscope == NULL) {
79d4e1f0 5310 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5311 goto out;
5312 }
32b01310
TM		 5313 } else
5314 kfree(res.impl_id);
7d2ed9ac 5315
acdeb69d
CL		 5316out_server_owner:
5317 kfree(res.server_owner);
7d2ed9ac 5318out_server_scope:
abe9a6d5
WAA		 5319 kfree(res.server_scope);
5320out:
177313f1 5321 if (clp->cl_implid != NULL)
7d2ed9ac
WAA		 5322 dprintk("%s: Server Implementation ID: "
5323 "domain: %s, name: %s, date: %llu,%u\n",
59155546
CL		 5324 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5325 clp->cl_implid->date.seconds,
5326 clp->cl_implid->date.nseconds);
99fe60d0
BH		 5327 dprintk("<-- %s status= %d\n", __func__, status);
5328 return status;
5329}
5330
66245539
TM		 5331static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5332 struct rpc_cred *cred)
5333{
5334 struct rpc_message msg = {
5335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5336 .rpc_argp = clp,
5337 .rpc_cred = cred,
5338 };
5339 int status;
5340
5341 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5342 if (status)
02c67525 5343 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5344 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5345 return status;
5346}
5347
5348static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5349 struct rpc_cred *cred)
5350{
5351 unsigned int loop;
5352 int ret;
5353
5354 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5355 ret = _nfs4_proc_destroy_clientid(clp, cred);
5356 switch (ret) {
5357 case -NFS4ERR_DELAY:
5358 case -NFS4ERR_CLIENTID_BUSY:
5359 ssleep(1);
5360 break;
5361 default:
5362 return ret;
5363 }
5364 }
5365 return 0;
5366}
5367
5368int nfs4_destroy_clientid(struct nfs_client *clp)
5369{
5370 struct rpc_cred *cred;
5371 int ret = 0;
5372
5373 if (clp->cl_mvops->minor_version < 1)
5374 goto out;
5375 if (clp->cl_exchange_flags == 0)
5376 goto out;
5377 cred = nfs4_get_exchange_id_cred(clp);
5378 ret = nfs4_proc_destroy_clientid(clp, cred);
5379 if (cred)
5380 put_rpccred(cred);
5381 switch (ret) {
5382 case 0:
5383 case -NFS4ERR_STALE_CLIENTID:
5384 clp->cl_exchange_flags = 0;
5385 }
5386out:
5387 return ret;
5388}
5389
2050f0cc
AA		 5390struct nfs4_get_lease_time_data {
5391 struct nfs4_get_lease_time_args *args;
5392 struct nfs4_get_lease_time_res *res;
5393 struct nfs_client *clp;
5394};
5395
5396static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5397 void *calldata)
5398{
5399 int ret;
5400 struct nfs4_get_lease_time_data *data =
5401 (struct nfs4_get_lease_time_data *)calldata;
5402
5403 dprintk("--> %s\n", __func__);
689cf5c1 5404 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5405 /* just setup sequence, do not trigger session recovery
5406 since we're invoked within one */
5407 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5408 &data->args->la_seq_args,
9d12b216 5409 &data->res->lr_seq_res, task);
2050f0cc
AA		 5410
5411 BUG_ON(ret == -EAGAIN);
5412 rpc_call_start(task);
5413 dprintk("<-- %s\n", __func__);
5414}
5415
5416/*
5417 * Called from nfs4_state_manager thread for session setup, so don't recover
5418 * from sequence operation or clientid errors.
5419 */
5420static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5421{
5422 struct nfs4_get_lease_time_data *data =
5423 (struct nfs4_get_lease_time_data *)calldata;
5424
5425 dprintk("--> %s\n", __func__);
14516c3a
TM		 5426 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5427 return;
2050f0cc
AA		 5428 switch (task->tk_status) {
5429 case -NFS4ERR_DELAY:
5430 case -NFS4ERR_GRACE:
5431 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5432 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5433 task->tk_status = 0;
a8a4ae3a
AA		 5434 /* fall through */
5435 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5436 rpc_restart_call_prepare(task);
2050f0cc
AA		 5437 return;
5438 }
2050f0cc
AA		 5439 dprintk("<-- %s\n", __func__);
5440}
5441
17280175 5442static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5443 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5444 .rpc_call_done = nfs4_get_lease_time_done,
5445};
5446
5447int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5448{
5449 struct rpc_task *task;
5450 struct nfs4_get_lease_time_args args;
5451 struct nfs4_get_lease_time_res res = {
5452 .lr_fsinfo = fsinfo,
5453 };
5454 struct nfs4_get_lease_time_data data = {
5455 .args = &args,
5456 .res = &res,
5457 .clp = clp,
5458 };
5459 struct rpc_message msg = {
5460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5461 .rpc_argp = &args,
5462 .rpc_resp = &res,
5463 };
5464 struct rpc_task_setup task_setup = {
5465 .rpc_client = clp->cl_rpcclient,
5466 .rpc_message = &msg,
5467 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5468 .callback_data = &data,
5469 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5470 };
5471 int status;
5472
9d12b216 5473 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5474 dprintk("--> %s\n", __func__);
5475 task = rpc_run_task(&task_setup);
5476
5477 if (IS_ERR(task))
5478 status = PTR_ERR(task);
5479 else {
5480 status = task->tk_status;
5481 rpc_put_task(task);
5482 }
5483 dprintk("<-- %s return %d\n", __func__, status);
5484
5485 return status;
5486}
5487
f86f36a6
TM		 5488static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5489{
5490 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5491}
5492
5493static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5494 struct nfs4_slot *new,
5495 u32 max_slots,
5496 u32 ivalue)
5497{
5498 struct nfs4_slot *old = NULL;
5499 u32 i;
5500
5501 spin_lock(&tbl->slot_tbl_lock);
5502 if (new) {
5503 old = tbl->slots;
5504 tbl->slots = new;
5505 tbl->max_slots = max_slots;
5506 }
5507 tbl->highest_used_slotid = -1; /* no slot is currently used */
5508 for (i = 0; i < tbl->max_slots; i++)
5509 tbl->slots[i].seq_nr = ivalue;
5510 spin_unlock(&tbl->slot_tbl_lock);
5511 kfree(old);
5512}
5513
b73dafa7 5514/*
f86f36a6 5515 * (re)Initialise a slot table
b73dafa7 5516 */
f86f36a6
TM		 5517static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5518 u32 ivalue)
ac72b7b3 5519{
104aeba4 5520 struct nfs4_slot *new = NULL;
f86f36a6 5521 int ret = -ENOMEM;
ac72b7b3 5522
104aeba4
AA		 5523 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5524 max_reqs, tbl->max_slots);
ac72b7b3 5525
104aeba4
AA		 5526 /* Does the newly negotiated max_reqs match the existing slot table? */
5527 if (max_reqs != tbl->max_slots) {
f86f36a6 5528 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5529 if (!new)
5530 goto out;
104aeba4 5531 }
f86f36a6
TM		 5532 ret = 0;
5533
5534 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5535 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5536 tbl, tbl->slots, tbl->max_slots);
5537out:
5538 dprintk("<-- %s: return %d\n", __func__, ret);
5539 return ret;
5540}
5541
f8625a6a
RL		 5542/* Destroy the slot table */
5543static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5544{
5545 if (session->fc_slot_table.slots != NULL) {
5546 kfree(session->fc_slot_table.slots);
5547 session->fc_slot_table.slots = NULL;
5548 }
5549 if (session->bc_slot_table.slots != NULL) {
5550 kfree(session->bc_slot_table.slots);
5551 session->bc_slot_table.slots = NULL;
5552 }
5553 return;
5554}
5555
050047ce 5556/*
aacd5537 5557 * Initialize or reset the forechannel and backchannel tables
050047ce 5558 */
aacd5537 5559static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5560{
f26468fb 5561 struct nfs4_slot_table *tbl;
aacd5537 5562 int status;
050047ce 5563
aacd5537
AA		 5564 dprintk("--> %s\n", __func__);
5565 /* Fore channel */
5566 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5567 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5568 if (status) /* -ENOMEM */
5569 return status;
aacd5537
AA		 5570 /* Back channel */
5571 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5572 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5573 if (status && tbl->slots == NULL)
5574 /* Fore and back channel share a connection so get
5575 * both slot tables or neither */
5576 nfs4_destroy_slot_tables(ses);
f8625a6a 5577 return status;
557134a3
AA		 5578}
5579
5580struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5581{
5582 struct nfs4_session *session;
5583 struct nfs4_slot_table *tbl;
5584
8535b2be 5585 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5586 if (!session)
5587 return NULL;
76db6d95 5588
557134a3 5589 tbl = &session->fc_slot_table;
45d43c29 5590 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5591 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5592 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5593 init_completion(&tbl->complete);
f8625a6a
RL		 5594
5595 tbl = &session->bc_slot_table;
45d43c29 5596 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5597 spin_lock_init(&tbl->slot_tbl_lock);
5598 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5599 init_completion(&tbl->complete);
f8625a6a 5600
1055d76d
TM		 5601 session->session_state = 1<<NFS4_SESSION_INITING;
5602
557134a3
AA		 5603 session->clp = clp;
5604 return session;
5605}
5606
5607void nfs4_destroy_session(struct nfs4_session *session)
5608{
2446ab60 5609 struct rpc_xprt *xprt;
848f5bda 5610 struct rpc_cred *cred;
2446ab60 5611
848f5bda
TM		 5612 cred = nfs4_get_exchange_id_cred(session->clp);
5613 nfs4_proc_destroy_session(session, cred);
5614 if (cred)
5615 put_rpccred(cred);
2446ab60
TM		 5616
5617 rcu_read_lock();
5618 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5619 rcu_read_unlock();
5a0ffe54 5620 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5621 __func__, xprt);
5622 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5623 nfs4_destroy_slot_tables(session);
557134a3
AA		 5624 kfree(session);
5625}
5626
fc931582
AA		 5627/*
5628 * Initialize the values to be used by the client in CREATE_SESSION
5629 * If nfs4_init_session set the fore channel request and response sizes,
5630 * use them.
5631 *
5632 * Set the back channel max_resp_sz_cached to zero to force the client to
5633 * always set csa_cachethis to FALSE because the current implementation
5634 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5635 */
5636static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5637{
5638 struct nfs4_session *session = args->client->cl_session;
5639 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5640 mxresp_sz = session->fc_attrs.max_resp_sz;
5641
5642 if (mxrqst_sz == 0)
5643 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5644 if (mxresp_sz == 0)
5645 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5646 /* Fore channel attributes */
fc931582
AA		 5647 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5648 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5649 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5650 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5651
5652 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5653 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5654 __func__,
5655 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5656 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5657
5658 /* Back channel attributes */
fc931582
AA		 5659 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5660 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5661 args->bc_attrs.max_resp_sz_cached = 0;
5662 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5663 args->bc_attrs.max_reqs = 1;
5664
5665 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5666 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5667 __func__,
5668 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5669 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5670 args->bc_attrs.max_reqs);
5671}
5672
43c2e885 5673static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5674{
43c2e885
BF		 5675 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5676 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5677
43c2e885
BF		 5678 if (rcvd->max_resp_sz > sent->max_resp_sz)
5679 return -EINVAL;
5680 /*
5681 * Our requested max_ops is the minimum we need; we're not
5682 * prepared to break up compounds into smaller pieces than that.
5683 * So, no point even trying to continue if the server won't
5684 * cooperate:
5685 */
5686 if (rcvd->max_ops < sent->max_ops)
5687 return -EINVAL;
5688 if (rcvd->max_reqs == 0)
5689 return -EINVAL;
b4b9a0c1
VG		 5690 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5691 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5692 return 0;
8d35301d
AA		 5693}
5694
43c2e885
BF		 5695static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5696{
5697 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5698 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5699
43c2e885
BF		 5700 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5701 return -EINVAL;
5702 if (rcvd->max_resp_sz < sent->max_resp_sz)
5703 return -EINVAL;
5704 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5705 return -EINVAL;
5706 /* These would render the backchannel useless: */
b4b9a0c1 5707 if (rcvd->max_ops != sent->max_ops)
43c2e885 5708 return -EINVAL;
b4b9a0c1 5709 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5710 return -EINVAL;
5711 return 0;
5712}
8d35301d 5713
8d35301d
AA		 5714static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5715 struct nfs4_session *session)
5716{
43c2e885 5717 int ret;
8d35301d 5718
43c2e885
BF		 5719 ret = nfs4_verify_fore_channel_attrs(args, session);
5720 if (ret)
5721 return ret;
5722 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5723}
5724
848f5bda
TM		 5725static int _nfs4_proc_create_session(struct nfs_client *clp,
5726 struct rpc_cred *cred)
fc931582
AA		 5727{
5728 struct nfs4_session *session = clp->cl_session;
5729 struct nfs41_create_session_args args = {
5730 .client = clp,
5731 .cb_program = NFS4_CALLBACK,
5732 };
5733 struct nfs41_create_session_res res = {
5734 .client = clp,
5735 };
5736 struct rpc_message msg = {
5737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5738 .rpc_argp = &args,
5739 .rpc_resp = &res,
848f5bda 5740 .rpc_cred = cred,
fc931582
AA		 5741 };
5742 int status;
5743
5744 nfs4_init_channel_attrs(&args);
0f91421e 5745 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5746
1bd714f2 5747 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5748
8d35301d
AA		 5749 if (!status)
5750 /* Verify the session's negotiated channel_attrs values */
5751 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5752 if (!status) {
5753 /* Increment the clientid slot sequence id */
5754 clp->cl_seqid++;
5755 }
5756
5757 return status;
5758}
5759
5760/*
5761 * Issues a CREATE_SESSION operation to the server.
5762 * It is the responsibility of the caller to verify the session is
5763 * expired before calling this routine.
5764 */
848f5bda 5765int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5766{
5767 int status;
5768 unsigned *ptr;
fc931582
AA		 5769 struct nfs4_session *session = clp->cl_session;
5770
5771 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5772
848f5bda 5773 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5774 if (status)
5775 goto out;
5776
aacd5537
AA		 5777 /* Init or reset the session slot tables */
5778 status = nfs4_setup_session_slot_tables(session);
5779 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5780 if (status)
5781 goto out;
5782
5783 ptr = (unsigned *)&session->sess_id.data[0];
5784 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5785 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5786out:
5787 dprintk("<-- %s\n", __func__);
5788 return status;
5789}
5790
0f3e66c6
AA		 5791/*
5792 * Issue the over-the-wire RPC DESTROY_SESSION.
5793 * The caller must serialize access to this routine.
5794 */
848f5bda
TM		 5795int nfs4_proc_destroy_session(struct nfs4_session *session,
5796 struct rpc_cred *cred)
0f3e66c6 5797{
848f5bda
TM		 5798 struct rpc_message msg = {
5799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5800 .rpc_argp = session,
5801 .rpc_cred = cred,
5802 };
0f3e66c6 5803 int status = 0;
0f3e66c6
AA		 5804
5805 dprintk("--> nfs4_proc_destroy_session\n");
5806
5807 /* session is still being setup */
5808 if (session->clp->cl_cons_state != NFS_CS_READY)
5809 return status;
5810
1bd714f2 5811 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5812
5813 if (status)
08106ac7 5814 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5815 "Session has been destroyed regardless...\n", status);
5816
5817 dprintk("<-- nfs4_proc_destroy_session\n");
5818 return status;
5819}
5820
7b38c368
TM		 5821/*
5822 * With sessions, the client is not marked ready until after a
5823 * successful EXCHANGE_ID and CREATE_SESSION.
5824 *
5825 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5826 * other versions of NFS can be tried.
5827 */
5828static int nfs41_check_session_ready(struct nfs_client *clp)
5829{
5830 int ret;
5831
5832 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5833 ret = nfs4_client_recover_expired_lease(clp);
5834 if (ret)
5835 return ret;
5836 }
5837 if (clp->cl_cons_state < NFS_CS_READY)
5838 return -EPROTONOSUPPORT;
54ac471c 5839 smp_rmb();
7b38c368
TM		 5840 return 0;
5841}
5842
fccba804
TM		 5843int nfs4_init_session(struct nfs_server *server)
5844{
5845 struct nfs_client *clp = server->nfs_client;
2449ea2e 5846 struct nfs4_session *session;
68bf05ef 5847 unsigned int rsize, wsize;
fccba804
TM		 5848
5849 if (!nfs4_has_session(clp))
5850 return 0;
5851
1055d76d 5852 session = clp->cl_session;
7b38c368
TM		 5853 spin_lock(&clp->cl_lock);
5854 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5855
7b38c368
TM		 5856 rsize = server->rsize;
5857 if (rsize == 0)
5858 rsize = NFS_MAX_FILE_IO_SIZE;
5859 wsize = server->wsize;
5860 if (wsize == 0)
5861 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5862
7b38c368
TM		 5863 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5864 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5865 }
5866 spin_unlock(&clp->cl_lock);
2449ea2e 5867
7b38c368 5868 return nfs41_check_session_ready(clp);
fccba804
TM		 5869}
5870
7b38c368 5871int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5872{
5873 struct nfs4_session *session = clp->cl_session;
5874 int ret;
5875
7b38c368
TM		 5876 spin_lock(&clp->cl_lock);
5877 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5878 /*
5879 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5880 * DS lease to be equal to the MDS lease.
5881 */
5882 clp->cl_lease_time = lease_time;
5883 clp->cl_last_renewal = jiffies;
5884 }
5885 spin_unlock(&clp->cl_lock);
d83217c1 5886
7b38c368
TM		 5887 ret = nfs41_check_session_ready(clp);
5888 if (ret)
5889 return ret;
5890 /* Test for the DS role */
5891 if (!is_ds_client(clp))
5892 return -ENODEV;
5893 return 0;
d83217c1
AA		 5894}
5895EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5896
5897
fc01cea9
AA		 5898/*
5899 * Renew the cl_session lease.
5900 */
d5f8d3fe
TM		 5901struct nfs4_sequence_data {
5902 struct nfs_client *clp;
5903 struct nfs4_sequence_args args;
5904 struct nfs4_sequence_res res;
5905};
5906
dc96aef9
AB		 5907static void nfs41_sequence_release(void *data)
5908{
d5f8d3fe
TM		 5909 struct nfs4_sequence_data *calldata = data;
5910 struct nfs_client *clp = calldata->clp;
dc96aef9 5911
7135840f
AB		 5912 if (atomic_read(&clp->cl_count) > 1)
5913 nfs4_schedule_state_renewal(clp);
5914 nfs_put_client(clp);
d5f8d3fe 5915 kfree(calldata);
dc96aef9
AB		 5916}
5917
aa5190d0
TM		 5918static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5919{
5920 switch(task->tk_status) {
5921 case -NFS4ERR_DELAY:
aa5190d0
TM		 5922 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5923 return -EAGAIN;
5924 default:
0400a6b0 5925 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5926 }
5927 return 0;
5928}
5929
dc96aef9 5930static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5931{
d5f8d3fe
TM		 5932 struct nfs4_sequence_data *calldata = data;
5933 struct nfs_client *clp = calldata->clp;
fc01cea9 5934
14516c3a
TM		 5935 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5936 return;
fc01cea9
AA		 5937
5938 if (task->tk_status < 0) {
5939 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5940 if (atomic_read(&clp->cl_count) == 1)
5941 goto out;
fc01cea9 5942
aa5190d0
TM		 5943 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5944 rpc_restart_call_prepare(task);
fc01cea9
AA		 5945 return;
5946 }
5947 }
fc01cea9 5948 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5949out:
fc01cea9
AA		 5950 dprintk("<-- %s\n", __func__);
5951}
5952
5953static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5954{
d5f8d3fe
TM		 5955 struct nfs4_sequence_data *calldata = data;
5956 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5957 struct nfs4_sequence_args *args;
5958 struct nfs4_sequence_res *res;
5959
fc01cea9
AA		 5960 args = task->tk_msg.rpc_argp;
5961 res = task->tk_msg.rpc_resp;
5962
9d12b216 5963 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5964 return;
5965 rpc_call_start(task);
5966}
5967
5968static const struct rpc_call_ops nfs41_sequence_ops = {
5969 .rpc_call_done = nfs41_sequence_call_done,
5970 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5971 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5972};
5973
71ac6da9 5974static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5975{
d5f8d3fe 5976 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5977 struct rpc_message msg = {
5978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5979 .rpc_cred = cred,
5980 };
71ac6da9
TM		 5981 struct rpc_task_setup task_setup_data = {
5982 .rpc_client = clp->cl_rpcclient,
5983 .rpc_message = &msg,
5984 .callback_ops = &nfs41_sequence_ops,
5985 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5986 };
fc01cea9 5987
7135840f 5988 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5989 return ERR_PTR(-EIO);
dfb4f309 5990 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5991 if (calldata == NULL) {
7135840f 5992 nfs_put_client(clp);
71ac6da9 5993 return ERR_PTR(-ENOMEM);
fc01cea9 5994 }
9d12b216 5995 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5996 msg.rpc_argp = &calldata->args;
5997 msg.rpc_resp = &calldata->res;
5998 calldata->clp = clp;
71ac6da9 5999 task_setup_data.callback_data = calldata;
fc01cea9 6000
71ac6da9
TM		 6001 return rpc_run_task(&task_setup_data);
6002}
6003
2f60ea6b 6004static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6005{
6006 struct rpc_task *task;
6007 int ret = 0;
6008
2f60ea6b
TM		 6009 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6010 return 0;
71ac6da9
TM		 6011 task = _nfs41_proc_sequence(clp, cred);
6012 if (IS_ERR(task))
6013 ret = PTR_ERR(task);
6014 else
bf294b41 6015 rpc_put_task_async(task);
71ac6da9
TM		 6016 dprintk("<-- %s status=%d\n", __func__, ret);
6017 return ret;
6018}
6019
6020static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6021{
6022 struct rpc_task *task;
6023 int ret;
6024
6025 task = _nfs41_proc_sequence(clp, cred);
6026 if (IS_ERR(task)) {
6027 ret = PTR_ERR(task);
6028 goto out;
6029 }
6030 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6031 if (!ret) {
6032 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6033
6034 if (task->tk_status == 0)
6035 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6036 ret = task->tk_status;
b4410c2f 6037 }
71ac6da9
TM		 6038 rpc_put_task(task);
6039out:
6040 dprintk("<-- %s status=%d\n", __func__, ret);
6041 return ret;
fc01cea9
AA		 6042}
6043
fce5c838
RL		 6044struct nfs4_reclaim_complete_data {
6045 struct nfs_client *clp;
6046 struct nfs41_reclaim_complete_args arg;
6047 struct nfs41_reclaim_complete_res res;
6048};
6049
6050static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6051{
6052 struct nfs4_reclaim_complete_data *calldata = data;
6053
b257957e 6054 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6055 if (nfs41_setup_sequence(calldata->clp->cl_session,
6056 &calldata->arg.seq_args,
9d12b216 6057 &calldata->res.seq_res, task))
fce5c838
RL		 6058 return;
6059
6060 rpc_call_start(task);
6061}
6062
aa5190d0
TM		 6063static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6064{
6065 switch(task->tk_status) {
6066 case 0:
6067 case -NFS4ERR_COMPLETE_ALREADY:
6068 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6069 break;
6070 case -NFS4ERR_DELAY:
aa5190d0 6071 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6072 /* fall through */
6073 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6074 return -EAGAIN;
6075 default:
0400a6b0 6076 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6077 }
6078 return 0;
6079}
6080
fce5c838
RL		 6081static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6082{
6083 struct nfs4_reclaim_complete_data *calldata = data;
6084 struct nfs_client *clp = calldata->clp;
6085 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6086
6087 dprintk("--> %s\n", __func__);
14516c3a
TM		 6088 if (!nfs41_sequence_done(task, res))
6089 return;
fce5c838 6090
aa5190d0
TM		 6091 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6092 rpc_restart_call_prepare(task);
6093 return;
6094 }
fce5c838
RL		 6095 dprintk("<-- %s\n", __func__);
6096}
6097
6098static void nfs4_free_reclaim_complete_data(void *data)
6099{
6100 struct nfs4_reclaim_complete_data *calldata = data;
6101
6102 kfree(calldata);
6103}
6104
6105static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6106 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6107 .rpc_call_done = nfs4_reclaim_complete_done,
6108 .rpc_release = nfs4_free_reclaim_complete_data,
6109};
6110
6111/*
6112 * Issue a global reclaim complete.
6113 */
6114static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6115{
6116 struct nfs4_reclaim_complete_data *calldata;
6117 struct rpc_task *task;
6118 struct rpc_message msg = {
6119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6120 };
6121 struct rpc_task_setup task_setup_data = {
6122 .rpc_client = clp->cl_rpcclient,
6123 .rpc_message = &msg,
6124 .callback_ops = &nfs4_reclaim_complete_call_ops,
6125 .flags = RPC_TASK_ASYNC,
6126 };
6127 int status = -ENOMEM;
6128
6129 dprintk("--> %s\n", __func__);
8535b2be 6130 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6131 if (calldata == NULL)
6132 goto out;
6133 calldata->clp = clp;
6134 calldata->arg.one_fs = 0;
fce5c838 6135
9d12b216 6136 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6137 msg.rpc_argp = &calldata->arg;
6138 msg.rpc_resp = &calldata->res;
6139 task_setup_data.callback_data = calldata;
6140 task = rpc_run_task(&task_setup_data);
acf82b85 6141 if (IS_ERR(task)) {
fce5c838 6142 status = PTR_ERR(task);
acf82b85
DC		 6143 goto out;
6144 }
c34c32ea
AA		 6145 status = nfs4_wait_for_completion_rpc_task(task);
6146 if (status == 0)
6147 status = task->tk_status;
fce5c838 6148 rpc_put_task(task);
acf82b85 6149 return 0;
fce5c838
RL		 6150out:
6151 dprintk("<-- %s status=%d\n", __func__, status);
6152 return status;
6153}
b1f69b75
AA		 6154
6155static void
6156nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6157{
6158 struct nfs4_layoutget *lgp = calldata;
c31663d4 6159 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6160
6161 dprintk("--> %s\n", __func__);
c31663d4
FI		 6162 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6163 * right now covering the LAYOUTGET we are about to send.
6164 * However, that is not so catastrophic, and there seems
6165 * to be no way to prevent it completely.
6166 */
b1f69b75 6167 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6168 &lgp->res.seq_res, task))
b1f69b75 6169 return;
cf7d63f1
FI		 6170 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6171 NFS_I(lgp->args.inode)->layout,
6172 lgp->args.ctx->state)) {
6173 rpc_exit(task, NFS4_OK);
6174 return;
6175 }
b1f69b75
AA		 6176 rpc_call_start(task);
6177}
6178
6179static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6180{
6181 struct nfs4_layoutget *lgp = calldata;
6182 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6183
6184 dprintk("--> %s\n", __func__);
6185
6186 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6187 return;
6188
6189 switch (task->tk_status) {
6190 case 0:
6191 break;
6192 case -NFS4ERR_LAYOUTTRYLATER:
6193 case -NFS4ERR_RECALLCONFLICT:
6194 task->tk_status = -NFS4ERR_DELAY;
6195 /* Fall through */
6196 default:
6197 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6198 rpc_restart_call_prepare(task);
6199 return;
6200 }
6201 }
b1f69b75
AA		 6202 dprintk("<-- %s\n", __func__);
6203}
6204
6205static void nfs4_layoutget_release(void *calldata)
6206{
6207 struct nfs4_layoutget *lgp = calldata;
6208
6209 dprintk("--> %s\n", __func__);
b1f69b75
AA		 6210 put_nfs_open_context(lgp->args.ctx);
6211 kfree(calldata);
6212 dprintk("<-- %s\n", __func__);
6213}
6214
6215static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6216 .rpc_call_prepare = nfs4_layoutget_prepare,
6217 .rpc_call_done = nfs4_layoutget_done,
6218 .rpc_release = nfs4_layoutget_release,
6219};
6220
6221int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6222{
6223 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6224 struct rpc_task *task;
6225 struct rpc_message msg = {
6226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6227 .rpc_argp = &lgp->args,
6228 .rpc_resp = &lgp->res,
6229 };
6230 struct rpc_task_setup task_setup_data = {
6231 .rpc_client = server->client,
6232 .rpc_message = &msg,
6233 .callback_ops = &nfs4_layoutget_call_ops,
6234 .callback_data = lgp,
6235 .flags = RPC_TASK_ASYNC,
6236 };
6237 int status = 0;
6238
6239 dprintk("--> %s\n", __func__);
6240
35124a09 6241 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6242 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6243 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6244 task = rpc_run_task(&task_setup_data);
6245 if (IS_ERR(task))
6246 return PTR_ERR(task);
6247 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6248 if (status == 0)
6249 status = task->tk_status;
6250 if (status == 0)
6251 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6252 rpc_put_task(task);
6253 dprintk("<-- %s status=%d\n", __func__, status);
6254 return status;
6255}
6256
cbe82603
BH		 6257static void
6258nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6259{
6260 struct nfs4_layoutreturn *lrp = calldata;
6261
6262 dprintk("--> %s\n", __func__);
6263 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6264 &lrp->res.seq_res, task))
cbe82603
BH		 6265 return;
6266 rpc_call_start(task);
6267}
6268
6269static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6270{
6271 struct nfs4_layoutreturn *lrp = calldata;
6272 struct nfs_server *server;
a56aaa02 6273 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6274
6275 dprintk("--> %s\n", __func__);
6276
6277 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6278 return;
6279
6280 server = NFS_SERVER(lrp->args.inode);
6281 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6282 rpc_restart_call_prepare(task);
cbe82603
BH		 6283 return;
6284 }
a2e1d4f2 6285 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6286 if (task->tk_status == 0) {
cbe82603 6287 if (lrp->res.lrs_present) {
cbe82603 6288 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6289 } else
6290 BUG_ON(!list_empty(&lo->plh_segs));
6291 }
a2e1d4f2
FI		 6292 lo->plh_block_lgets--;
6293 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6294 dprintk("<-- %s\n", __func__);
6295}
6296
6297static void nfs4_layoutreturn_release(void *calldata)
6298{
6299 struct nfs4_layoutreturn *lrp = calldata;
6300
6301 dprintk("--> %s\n", __func__);
a56aaa02 6302 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6303 kfree(calldata);
6304 dprintk("<-- %s\n", __func__);
6305}
6306
6307static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6308 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6309 .rpc_call_done = nfs4_layoutreturn_done,
6310 .rpc_release = nfs4_layoutreturn_release,
6311};
6312
6313int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6314{
6315 struct rpc_task *task;
6316 struct rpc_message msg = {
6317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6318 .rpc_argp = &lrp->args,
6319 .rpc_resp = &lrp->res,
6320 };
6321 struct rpc_task_setup task_setup_data = {
6322 .rpc_client = lrp->clp->cl_rpcclient,
6323 .rpc_message = &msg,
6324 .callback_ops = &nfs4_layoutreturn_call_ops,
6325 .callback_data = lrp,
6326 };
6327 int status;
6328
6329 dprintk("--> %s\n", __func__);
9d12b216 6330 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6331 task = rpc_run_task(&task_setup_data);
6332 if (IS_ERR(task))
6333 return PTR_ERR(task);
6334 status = task->tk_status;
6335 dprintk("<-- %s status=%d\n", __func__, status);
6336 rpc_put_task(task);
6337 return status;
6338}
6339
7f11d8d3
AA		 6340/*
6341 * Retrieve the list of Data Server devices from the MDS.
6342 */
6343static int _nfs4_getdevicelist(struct nfs_server *server,
6344 const struct nfs_fh *fh,
6345 struct pnfs_devicelist *devlist)
6346{
6347 struct nfs4_getdevicelist_args args = {
6348 .fh = fh,
6349 .layoutclass = server->pnfs_curr_ld->id,
6350 };
6351 struct nfs4_getdevicelist_res res = {
6352 .devlist = devlist,
6353 };
6354 struct rpc_message msg = {
6355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6356 .rpc_argp = &args,
6357 .rpc_resp = &res,
6358 };
6359 int status;
6360
6361 dprintk("--> %s\n", __func__);
6362 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6363 &res.seq_res, 0);
6364 dprintk("<-- %s status=%d\n", __func__, status);
6365 return status;
6366}
6367
6368int nfs4_proc_getdevicelist(struct nfs_server *server,
6369 const struct nfs_fh *fh,
6370 struct pnfs_devicelist *devlist)
6371{
6372 struct nfs4_exception exception = { };
6373 int err;
6374
6375 do {
6376 err = nfs4_handle_exception(server,
6377 _nfs4_getdevicelist(server, fh, devlist),
6378 &exception);
6379 } while (exception.retry);
6380
6381 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6382 err, devlist->num_devs);
6383
6384 return err;
6385}
6386EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6387
b1f69b75
AA		 6388static int
6389_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6390{
6391 struct nfs4_getdeviceinfo_args args = {
6392 .pdev = pdev,
6393 };
6394 struct nfs4_getdeviceinfo_res res = {
6395 .pdev = pdev,
6396 };
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6399 .rpc_argp = &args,
6400 .rpc_resp = &res,
6401 };
6402 int status;
6403
6404 dprintk("--> %s\n", __func__);
7c513058 6405 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6406 dprintk("<-- %s status=%d\n", __func__, status);
6407
6408 return status;
6409}
6410
6411int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6412{
6413 struct nfs4_exception exception = { };
6414 int err;
6415
6416 do {
6417 err = nfs4_handle_exception(server,
6418 _nfs4_proc_getdeviceinfo(server, pdev),
6419 &exception);
6420 } while (exception.retry);
6421 return err;
6422}
6423EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6424
863a3c6c
AA		 6425static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6426{
6427 struct nfs4_layoutcommit_data *data = calldata;
6428 struct nfs_server *server = NFS_SERVER(data->args.inode);
6429
6430 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6431 &data->res.seq_res, task))
863a3c6c
AA		 6432 return;
6433 rpc_call_start(task);
6434}
6435
6436static void
6437nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6438{
6439 struct nfs4_layoutcommit_data *data = calldata;
6440 struct nfs_server *server = NFS_SERVER(data->args.inode);
6441
6442 if (!nfs4_sequence_done(task, &data->res.seq_res))
6443 return;
6444
6445 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6446 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6447 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6448 case -NFS4ERR_BADLAYOUT: /* no layout */
6449 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6450 task->tk_status = 0;
e59d27e0
TM		 6451 break;
6452 case 0:
863a3c6c
AA		 6453 nfs_post_op_update_inode_force_wcc(data->args.inode,
6454 data->res.fattr);
e59d27e0
TM		 6455 break;
6456 default:
6457 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6458 rpc_restart_call_prepare(task);
6459 return;
6460 }
6461 }
863a3c6c
AA		 6462}
6463
6464static void nfs4_layoutcommit_release(void *calldata)
6465{
6466 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6467 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6468 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6469
db29c089 6470 pnfs_cleanup_layoutcommit(data);
863a3c6c 6471 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6472 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6473 list_del_init(&lseg->pls_lc_list);
6474 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6475 &lseg->pls_flags))
6476 put_lseg(lseg);
6477 }
92407e75
PT		 6478
6479 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6480 smp_mb__after_clear_bit();
6481 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6482
863a3c6c
AA		 6483 put_rpccred(data->cred);
6484 kfree(data);
6485}
6486
6487static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6488 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6489 .rpc_call_done = nfs4_layoutcommit_done,
6490 .rpc_release = nfs4_layoutcommit_release,
6491};
6492
6493int
ef311537 6494nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6495{
6496 struct rpc_message msg = {
6497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6498 .rpc_argp = &data->args,
6499 .rpc_resp = &data->res,
6500 .rpc_cred = data->cred,
6501 };
6502 struct rpc_task_setup task_setup_data = {
6503 .task = &data->task,
6504 .rpc_client = NFS_CLIENT(data->args.inode),
6505 .rpc_message = &msg,
6506 .callback_ops = &nfs4_layoutcommit_ops,
6507 .callback_data = data,
6508 .flags = RPC_TASK_ASYNC,
6509 };
6510 struct rpc_task *task;
6511 int status = 0;
6512
6513 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6514 "lbw: %llu inode %lu\n",
6515 data->task.tk_pid, sync,
6516 data->args.lastbytewritten,
6517 data->args.inode->i_ino);
6518
9d12b216 6519 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6520 task = rpc_run_task(&task_setup_data);
6521 if (IS_ERR(task))
6522 return PTR_ERR(task);
ef311537 6523 if (sync == false)
863a3c6c
AA		 6524 goto out;
6525 status = nfs4_wait_for_completion_rpc_task(task);
6526 if (status != 0)
6527 goto out;
6528 status = task->tk_status;
6529out:
6530 dprintk("%s: status %d\n", __func__, status);
6531 rpc_put_task(task);
6532 return status;
6533}
fca78d6d
BS		 6534
6535static int
6536_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6537 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6538{
6539 struct nfs41_secinfo_no_name_args args = {
6540 .style = SECINFO_STYLE_CURRENT_FH,
6541 };
6542 struct nfs4_secinfo_res res = {
6543 .flavors = flavors,
6544 };
6545 struct rpc_message msg = {
6546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6547 .rpc_argp = &args,
6548 .rpc_resp = &res,
6549 };
6550 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6551}
6552
6553static int
6554nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6555 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6556{
6557 struct nfs4_exception exception = { };
6558 int err;
6559 do {
6560 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6561 switch (err) {
6562 case 0:
6563 case -NFS4ERR_WRONGSEC:
6564 case -NFS4ERR_NOTSUPP:
05e9cfb4 6565 goto out;
fca78d6d
BS		 6566 default:
6567 err = nfs4_handle_exception(server, err, &exception);
6568 }
6569 } while (exception.retry);
05e9cfb4 6570out:
fca78d6d
BS		 6571 return err;
6572}
6573
6574static int
6575nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6576 struct nfs_fsinfo *info)
6577{
6578 int err;
6579 struct page *page;
6580 rpc_authflavor_t flavor;
6581 struct nfs4_secinfo_flavors *flavors;
6582
6583 page = alloc_page(GFP_KERNEL);
6584 if (!page) {
6585 err = -ENOMEM;
6586 goto out;
6587 }
6588
6589 flavors = page_address(page);
6590 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6591
6592 /*
6593 * Fall back on "guess and check" method if
6594 * the server doesn't support SECINFO_NO_NAME
6595 */
6596 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6597 err = nfs4_find_root_sec(server, fhandle, info);
6598 goto out_freepage;
6599 }
6600 if (err)
6601 goto out_freepage;
6602
6603 flavor = nfs_find_best_sec(flavors);
6604 if (err == 0)
6605 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6606
6607out_freepage:
6608 put_page(page);
6609 if (err == -EACCES)
6610 return -EPERM;
6611out:
6612 return err;
6613}
1cab0652
BS		 6614
6615static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6616{
6617 int status;
6618 struct nfs41_test_stateid_args args = {
1cab0652 6619 .stateid = stateid,
7d974794
BS		 6620 };
6621 struct nfs41_test_stateid_res res;
6622 struct rpc_message msg = {
6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6624 .rpc_argp = &args,
6625 .rpc_resp = &res,
6626 };
1cab0652 6627
9d12b216 6628 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6629 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
377e507d
CL		 6630 if (status != NFS_OK)
6631 return status;
6632 return -res.status;
7d974794
BS		 6633}
6634
1cab0652 6635static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6636{
6637 struct nfs4_exception exception = { };
6638 int err;
6639 do {
377e507d
CL		 6640 err = _nfs41_test_stateid(server, stateid);
6641 if (err != -NFS4ERR_DELAY)
6642 break;
6643 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6644 } while (exception.retry);
6645 return err;
6646}
9aeda35f 6647
1cab0652 6648static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6649{
9aeda35f 6650 struct nfs41_free_stateid_args args = {
1cab0652 6651 .stateid = stateid,
9aeda35f
BS		 6652 };
6653 struct nfs41_free_stateid_res res;
6654 struct rpc_message msg = {
6655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6656 .rpc_argp = &args,
6657 .rpc_resp = &res,
6658 };
6659
9d12b216 6660 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
377e507d
CL		 6661 return nfs4_call_sync_sequence(server->client, server, &msg,
6662 &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6663}
6664
1cab0652 6665static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6666{
6667 struct nfs4_exception exception = { };
6668 int err;
6669 do {
377e507d
CL		 6670 err = _nfs4_free_stateid(server, stateid);
6671 if (err != -NFS4ERR_DELAY)
6672 break;
6673 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6674 } while (exception.retry);
6675 return err;
6676}
36281caa
TM		 6677
6678static bool nfs41_match_stateid(const nfs4_stateid *s1,
6679 const nfs4_stateid *s2)
6680{
2d2f24ad 6681 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6682 return false;
6683
2d2f24ad 6684 if (s1->seqid == s2->seqid)
36281caa 6685 return true;
2d2f24ad 6686 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6687 return true;
6688
6689 return false;
6690}
6691
557134a3
AA		 6692#endif /* CONFIG_NFS_V4_1 */
6693
36281caa
TM		 6694static bool nfs4_match_stateid(const nfs4_stateid *s1,
6695 const nfs4_stateid *s2)
6696{
f597c537 6697 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6698}
6699
6700
17280175 6701static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6702 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6703 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6704 .recover_open = nfs4_open_reclaim,
6705 .recover_lock = nfs4_lock_reclaim,
591d71cb 6706 .establish_clid = nfs4_init_clientid,
90a16617 6707 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6708};
6709
591d71cb 6710#if defined(CONFIG_NFS_V4_1)
17280175 6711static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6712 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6713 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6714 .recover_open = nfs4_open_reclaim,
6715 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6716 .establish_clid = nfs41_init_clientid,
b4b82607 6717 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6718 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6719};
6720#endif /* CONFIG_NFS_V4_1 */
6721
17280175 6722static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6723 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6724 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6725 .recover_open = nfs4_open_expired,
6726 .recover_lock = nfs4_lock_expired,
6727 .establish_clid = nfs4_init_clientid,
90a16617 6728 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6729};
6730
6731#if defined(CONFIG_NFS_V4_1)
17280175 6732static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6733 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6734 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6735 .recover_open = nfs41_open_expired,
6736 .recover_lock = nfs41_lock_expired,
4d643d1d 6737 .establish_clid = nfs41_init_clientid,
b4b82607 6738 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6739};
591d71cb 6740#endif /* CONFIG_NFS_V4_1 */
1da177e4 6741
17280175 6742static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6743 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6744 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6745 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6746};
6747
6748#if defined(CONFIG_NFS_V4_1)
17280175 6749static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6750 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6751 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6752 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6753};
6754#endif
6755
97dc1359
TM		 6756static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6757 .minor_version = 0,
6758 .call_sync = _nfs4_call_sync,
36281caa 6759 .match_stateid = nfs4_match_stateid,
fca78d6d 6760 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6761 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6762 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6763 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6764};
6765
6766#if defined(CONFIG_NFS_V4_1)
6767static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6768 .minor_version = 1,
6769 .call_sync = _nfs4_call_sync_session,
36281caa 6770 .match_stateid = nfs41_match_stateid,
fca78d6d 6771 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6772 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6773 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6774 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6775};
6776#endif
6777
97dc1359
TM		 6778const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6779 [0] = &nfs_v4_0_minor_ops,
6780#if defined(CONFIG_NFS_V4_1)
6781 [1] = &nfs_v4_1_minor_ops,
6782#endif
6783};
6784
92e1d5be 6785static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6786 .permission = nfs_permission,
6787 .getattr = nfs_getattr,
6788 .setattr = nfs_setattr,
64c2ce8b
AK		 6789 .getxattr = generic_getxattr,
6790 .setxattr = generic_setxattr,
6791 .listxattr = generic_listxattr,
6792 .removexattr = generic_removexattr,
6b3b5496
BF		 6793};
6794
509de811 6795const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6796 .version = 4, /* protocol version */
6797 .dentry_ops = &nfs4_dentry_operations,
6798 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6799 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6800 .file_ops = &nfs4_file_operations,
1da177e4 6801 .getroot = nfs4_proc_get_root,
281cad46 6802 .submount = nfs4_submount,
1da177e4
LT		 6803 .getattr = nfs4_proc_getattr,
6804 .setattr = nfs4_proc_setattr,
6805 .lookup = nfs4_proc_lookup,
6806 .access = nfs4_proc_access,
6807 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6808 .create = nfs4_proc_create,
6809 .remove = nfs4_proc_remove,
6810 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6811 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6812 .unlink_done = nfs4_proc_unlink_done,
6813 .rename = nfs4_proc_rename,
d3d4152a 6814 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6815 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6816 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6817 .link = nfs4_proc_link,
6818 .symlink = nfs4_proc_symlink,
6819 .mkdir = nfs4_proc_mkdir,
6820 .rmdir = nfs4_proc_remove,
6821 .readdir = nfs4_proc_readdir,
6822 .mknod = nfs4_proc_mknod,
6823 .statfs = nfs4_proc_statfs,
6824 .fsinfo = nfs4_proc_fsinfo,
6825 .pathconf = nfs4_proc_pathconf,
e9326dca 6826 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6827 .decode_dirent = nfs4_decode_dirent,
6828 .read_setup = nfs4_proc_read_setup,
1abb5088 6829 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6830 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6831 .read_done = nfs4_read_done,
1da177e4 6832 .write_setup = nfs4_proc_write_setup,
57208fa7 6833 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6834 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6835 .write_done = nfs4_write_done,
1da177e4 6836 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6837 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6838 .commit_done = nfs4_commit_done,
1da177e4 6839 .lock = nfs4_proc_lock,
e50a1c2e 6840 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6841 .close_context = nfs4_close_context,
2b484297 6842 .open_context = nfs4_atomic_open,
011e2a7f 6843 .have_delegation = nfs4_have_delegation,
57ec14c5 6844 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6845 .alloc_client = nfs4_alloc_client,
45a52a02 6846 .init_client = nfs4_init_client,
cdb7eced 6847 .free_client = nfs4_free_client,
1da177e4
LT		 6848};
6849
64c2ce8b
AK		 6850static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6851 .prefix = XATTR_NAME_NFSV4_ACL,
6852 .list = nfs4_xattr_list_nfs4_acl,
6853 .get = nfs4_xattr_get_nfs4_acl,
6854 .set = nfs4_xattr_set_nfs4_acl,
6855};
6856
6857const struct xattr_handler *nfs4_xattr_handlers[] = {
6858 &nfs4_xattr_nfs4_acl_handler,
6859 NULL
6860};
6861
ef159e91
TM		 6862module_param(max_session_slots, ushort, 0644);
6863MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6864 "requests the client will negotiate");
6865
1da177e4
LT		 6866/*
6867 * Local variables:
6868 * c-basic-offset: 8
6869 * End:
6870 */
Linux 6.x block layer and io_uring tree(s)