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[mirror_ubuntu-zesty-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
ef159e91
TM		 75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
87 struct nfs4_state *state);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
90static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 91#endif
1da177e4 92/* Prevent leaks of NFSv4 errors into userland */
46f72f57 93static int nfs4_map_errors(int err)
1da177e4 94{
52567b03
TM		 95 if (err >= -1000)
96 return err;
97 switch (err) {
98 case -NFS4ERR_RESOURCE:
99 return -EREMOTEIO;
7ebb9315
BS		 100 case -NFS4ERR_WRONGSEC:
101 return -EPERM;
3ddeb7c5
TM		 102 case -NFS4ERR_BADOWNER:
103 case -NFS4ERR_BADNAME:
104 return -EINVAL;
fb13bfa7
TM		 105 case -NFS4ERR_SHARE_DENIED:
106 return -EACCES;
f25efd85
SD		 107 case -NFS4ERR_MINOR_VERS_MISMATCH:
108 return -EPROTONOSUPPORT;
52567b03 109 default:
1da177e4 110 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 111 __func__, -err);
52567b03 112 break;
1da177e4 113 }
52567b03 114 return -EIO;
1da177e4
LT		 115}
116
117/*
118 * This is our standard bitmap for GETATTR requests.
119 */
1549210f 120const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 121 FATTR4_WORD0_TYPE
122 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_SIZE
124 | FATTR4_WORD0_FSID
125 | FATTR4_WORD0_FILEID,
126 FATTR4_WORD1_MODE
127 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
135};
136
1549210f
TM		 137static const u32 nfs4_pnfs_open_bitmap[3] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID,
143 FATTR4_WORD1_MODE
144 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
153};
154
1da177e4
LT		 155const u32 nfs4_statfs_bitmap[2] = {
156 FATTR4_WORD0_FILES_AVAIL
157 | FATTR4_WORD0_FILES_FREE
158 | FATTR4_WORD0_FILES_TOTAL,
159 FATTR4_WORD1_SPACE_AVAIL
160 | FATTR4_WORD1_SPACE_FREE
161 | FATTR4_WORD1_SPACE_TOTAL
162};
163
4ce79717 164const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 165 FATTR4_WORD0_MAXLINK
166 | FATTR4_WORD0_MAXNAME,
167 0
168};
169
dae100c2 170const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 171 | FATTR4_WORD0_MAXREAD
172 | FATTR4_WORD0_MAXWRITE
173 | FATTR4_WORD0_LEASE_TIME,
55b6e774 174 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 175 | FATTR4_WORD1_FS_LAYOUT_TYPES,
176 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 177};
178
830b8e33
MN		 179const u32 nfs4_fs_locations_bitmap[2] = {
180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID
185 | FATTR4_WORD0_FS_LOCATIONS,
186 FATTR4_WORD1_MODE
187 | FATTR4_WORD1_NUMLINKS
188 | FATTR4_WORD1_OWNER
189 | FATTR4_WORD1_OWNER_GROUP
190 | FATTR4_WORD1_RAWDEV
191 | FATTR4_WORD1_SPACE_USED
192 | FATTR4_WORD1_TIME_ACCESS
193 | FATTR4_WORD1_TIME_METADATA
194 | FATTR4_WORD1_TIME_MODIFY
195 | FATTR4_WORD1_MOUNTED_ON_FILEID
196};
197
bc4785cd 198static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 199 struct nfs4_readdir_arg *readdir)
200{
0dbb4c67 201 __be32 *start, *p;
1da177e4
LT		 202
203 BUG_ON(readdir->count < 80);
204 if (cookie > 2) {
b7ef1956 205 readdir->cookie = cookie;
1da177e4
LT		 206 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
207 return;
208 }
209
210 readdir->cookie = 0;
211 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
212 if (cookie == 2)
213 return;
214
215 /*
216 * NFSv4 servers do not return entries for '.' and '..'
217 * Therefore, we fake these entries here. We let '.'
218 * have cookie 0 and '..' have cookie 1. Note that
219 * when talking to the server, we always send cookie 0
220 * instead of 1 or 2.
221 */
2b86ce2d 222 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 223
224 if (cookie == 0) {
225 *p++ = xdr_one; /* next */
226 *p++ = xdr_zero; /* cookie, first word */
227 *p++ = xdr_one; /* cookie, second word */
228 *p++ = xdr_one; /* entry len */
229 memcpy(p, ".\0\0\0", 4); /* entry */
230 p++;
231 *p++ = xdr_one; /* bitmap length */
232 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
233 *p++ = htonl(8); /* attribute buffer length */
4e769b93 234 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 235 }
236
237 *p++ = xdr_one; /* next */
238 *p++ = xdr_zero; /* cookie, first word */
239 *p++ = xdr_two; /* cookie, second word */
240 *p++ = xdr_two; /* entry len */
241 memcpy(p, "..\0\0", 4); /* entry */
242 p++;
243 *p++ = xdr_one; /* bitmap length */
244 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
245 *p++ = htonl(8); /* attribute buffer length */
4e769b93 246 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 247
248 readdir->pgbase = (char *)p - (char *)start;
249 readdir->count -= readdir->pgbase;
2b86ce2d 250 kunmap_atomic(start);
1da177e4
LT		 251}
252
65de872e
TM		 253static int nfs4_wait_clnt_recover(struct nfs_client *clp)
254{
255 int res;
256
257 might_sleep();
258
e005e804 259 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 260 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 261 return res;
262}
263
264static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
265{
266 int res = 0;
267
268 might_sleep();
269
270 if (*timeout <= 0)
271 *timeout = NFS4_POLL_RETRY_MIN;
272 if (*timeout > NFS4_POLL_RETRY_MAX)
273 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 274 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 275 if (fatal_signal_pending(current))
276 res = -ERESTARTSYS;
277 *timeout <<= 1;
278 return res;
279}
280
281/* This is the error handling routine for processes that are allowed
282 * to sleep.
283 */
b064eca2 284static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 285{
286 struct nfs_client *clp = server->nfs_client;
9e33bed5 287 struct nfs4_state *state = exception->state;
3114ea7a 288 struct inode *inode = exception->inode;
65de872e
TM		 289 int ret = errorcode;
290
291 exception->retry = 0;
292 switch(errorcode) {
293 case 0:
294 return 0;
3114ea7a 295 case -NFS4ERR_OPENMODE:
011e2a7f 296 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 297 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 298 exception->retry = 1;
299 return 0;
300 }
301 if (state == NULL)
302 break;
303 nfs4_schedule_stateid_recovery(server, state);
304 goto wait_on_recovery;
a1d0b5ee 305 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 306 case -NFS4ERR_ADMIN_REVOKED:
307 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 308 if (state == NULL)
309 break;
14977489 310 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 311 nfs4_schedule_stateid_recovery(server, state);
312 goto wait_on_recovery;
0ced63d1
TM		 313 case -NFS4ERR_EXPIRED:
314 if (state != NULL)
315 nfs4_schedule_stateid_recovery(server, state);
65de872e 316 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 317 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 318 nfs4_schedule_lease_recovery(clp);
319 goto wait_on_recovery;
03391693 320#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 321 case -NFS4ERR_BADSESSION:
322 case -NFS4ERR_BADSLOT:
323 case -NFS4ERR_BAD_HIGH_SLOT:
324 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
325 case -NFS4ERR_DEADSESSION:
326 case -NFS4ERR_SEQ_FALSE_RETRY:
327 case -NFS4ERR_SEQ_MISORDERED:
328 dprintk("%s ERROR: %d Reset session\n", __func__,
329 errorcode);
9f594791 330 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 331 exception->retry = 1;
b9179237 332 break;
03391693 333#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 334 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 335 if (exception->timeout > HZ) {
336 /* We have retried a decent amount, time to
337 * fail
338 */
339 ret = -EBUSY;
340 break;
341 }
65de872e
TM		 342 case -NFS4ERR_GRACE:
343 case -NFS4ERR_DELAY:
2c643488 344 case -EKEYEXPIRED:
65de872e
TM		 345 ret = nfs4_delay(server->client, &exception->timeout);
346 if (ret != 0)
347 break;
a8a4ae3a 348 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 349 case -NFS4ERR_OLD_STATEID:
350 exception->retry = 1;
b064eca2
TM		 351 break;
352 case -NFS4ERR_BADOWNER:
353 /* The following works around a Linux server bug! */
354 case -NFS4ERR_BADNAME:
355 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
356 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
357 exception->retry = 1;
358 printk(KERN_WARNING "NFS: v4 server %s "
359 "does not accept raw "
360 "uid/gids. "
361 "Reenabling the idmapper.\n",
362 server->nfs_client->cl_hostname);
363 }
65de872e
TM		 364 }
365 /* We failed to handle the error */
366 return nfs4_map_errors(ret);
0400a6b0 367wait_on_recovery:
a2c0b9e2
TM		 368 ret = nfs4_wait_clnt_recover(clp);
369 if (ret == 0)
370 exception->retry = 1;
371 return ret;
65de872e
TM		 372}
373
374
452e9352 375static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 376{
1da177e4
LT		 377 spin_lock(&clp->cl_lock);
378 if (time_before(clp->cl_last_renewal,timestamp))
379 clp->cl_last_renewal = timestamp;
380 spin_unlock(&clp->cl_lock);
381}
382
452e9352
TM		 383static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
384{
385 do_renew_lease(server->nfs_client, timestamp);
386}
387
cccef3b9
AA		 388#if defined(CONFIG_NFS_V4_1)
389
e2c4ab3c
AA		 390/*
391 * nfs4_free_slot - free a slot and efficiently update slot table.
392 *
393 * freeing a slot is trivially done by clearing its respective bit
394 * in the bitmap.
395 * If the freed slotid equals highest_used_slotid we want to update it
396 * so that the server would be able to size down the slot table if needed,
397 * otherwise we know that the highest_used_slotid is still in use.
398 * When updating highest_used_slotid there may be "holes" in the bitmap
399 * so we need to scan down from highest_used_slotid to 0 looking for the now
400 * highest slotid in use.
45d43c29 401 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 402 *
403 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 404 */
405static void
45d43c29 406nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 407{
45d43c29 408 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 409 /* clear used bit in bitmap */
410 __clear_bit(slotid, tbl->used_slots);
411
412 /* update highest_used_slotid when it is freed */
413 if (slotid == tbl->highest_used_slotid) {
414 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 415 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 416 tbl->highest_used_slotid = slotid;
417 else
45d43c29 418 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 419 }
45d43c29
TM		 420 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
421 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 422}
423
961a828d
TM		 424bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
425{
426 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
427 return true;
e2c4ab3c
AA		 428}
429
3bfb0fc5 430/*
42acd021 431 * Signal state manager thread if session fore channel is drained
3bfb0fc5 432 */
42acd021 433static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 434{
a2118c33 435 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 436 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
437 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 438 return;
439 }
440
45d43c29 441 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 442 return;
443
42acd021
AA		 444 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
445 complete(&ses->fc_slot_table.complete);
446}
447
448/*
449 * Signal state manager thread if session back channel is drained
450 */
451void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
452{
453 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 454 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 455 return;
456 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
457 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 458}
459
d185a334 460static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 461{
462 struct nfs4_slot_table *tbl;
463
d185a334 464 tbl = &res->sr_session->fc_slot_table;
dfb4f309 465 if (!res->sr_slot) {
13615871
AA		 466 /* just wake up the next guy waiting since
467 * we may have not consumed a slot after all */
691daf3b 468 dprintk("%s: No slot\n", __func__);
35dc1d74 469 return;
13615871 470 }
ea028ac9 471
35dc1d74 472 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 473 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 474 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 475 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 476 res->sr_slot = NULL;
13615871
AA		 477}
478
14516c3a 479static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 480{
481 unsigned long timestamp;
14516c3a 482 struct nfs_client *clp;
b0df806c
AA		 483
484 /*
485 * sr_status remains 1 if an RPC level error occurred. The server
486 * may or may not have processed the sequence operation..
487 * Proceed as if the server received and processed the sequence
488 * operation.
489 */
490 if (res->sr_status == 1)
491 res->sr_status = NFS_OK;
492
468f8613
BS		 493 /* don't increment the sequence number if the task wasn't sent */
494 if (!RPC_WAS_SENT(task))
b0df806c
AA		 495 goto out;
496
691daf3b 497 /* Check the SEQUENCE operation status */
14516c3a
TM		 498 switch (res->sr_status) {
499 case 0:
b0df806c 500 /* Update the slot's sequence and clientid lease timer */
dfb4f309 501 ++res->sr_slot->seq_nr;
b0df806c 502 timestamp = res->sr_renewal_time;
14516c3a 503 clp = res->sr_session->clp;
452e9352 504 do_renew_lease(clp, timestamp);
0629e370 505 /* Check sequence flags */
b4410c2f
TM		 506 if (res->sr_status_flags != 0)
507 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 508 break;
509 case -NFS4ERR_DELAY:
510 /* The server detected a resend of the RPC call and
511 * returned NFS4ERR_DELAY as per Section 2.10.6.2
512 * of RFC5661.
513 */
12364a4f 514 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 515 __func__,
516 res->sr_slot - res->sr_session->fc_slot_table.slots,
517 res->sr_slot->seq_nr);
14516c3a
TM		 518 goto out_retry;
519 default:
520 /* Just update the slot sequence no. */
dfb4f309 521 ++res->sr_slot->seq_nr;
b0df806c
AA		 522 }
523out:
524 /* The session may be reset by one of the error handlers. */
525 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 526 nfs41_sequence_free_slot(res);
14516c3a
TM		 527 return 1;
528out_retry:
d05dd4e9 529 if (!rpc_restart_call(task))
14516c3a
TM		 530 goto out;
531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
532 return 0;
b0df806c
AA		 533}
534
14516c3a
TM		 535static int nfs4_sequence_done(struct rpc_task *task,
536 struct nfs4_sequence_res *res)
df896455 537{
14516c3a
TM		 538 if (res->sr_session == NULL)
539 return 1;
540 return nfs41_sequence_done(task, res);
df896455
TM		 541}
542
510b8175
BH		 543/*
544 * nfs4_find_slot - efficiently look for a free slot
545 *
546 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
547 * If found, we mark the slot as used, update the highest_used_slotid,
548 * and respectively set up the sequence operation args.
45d43c29 549 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 550 *
551 * Note: must be called with under the slot_tbl_lock.
510b8175 552 */
45d43c29 553static u32
40ead580 554nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 555{
45d43c29
TM		 556 u32 slotid;
557 u32 ret_id = NFS4_NO_SLOT;
510b8175 558
45d43c29 559 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 560 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
561 tbl->max_slots);
562 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
563 if (slotid >= tbl->max_slots)
564 goto out;
565 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 566 if (slotid > tbl->highest_used_slotid ||
567 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 568 tbl->highest_used_slotid = slotid;
569 ret_id = slotid;
570out:
571 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
572 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 573 return ret_id;
574}
575
9d12b216
TM		 576static void nfs41_init_sequence(struct nfs4_sequence_args *args,
577 struct nfs4_sequence_res *res, int cache_reply)
578{
579 args->sa_session = NULL;
580 args->sa_cache_this = 0;
581 if (cache_reply)
582 args->sa_cache_this = 1;
583 res->sr_session = NULL;
584 res->sr_slot = NULL;
585}
586
dc70d7b3 587int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 588 struct nfs4_sequence_args *args,
589 struct nfs4_sequence_res *res,
ce5039c1
AA		 590 struct rpc_task *task)
591{
fbcd4abc
AA		 592 struct nfs4_slot *slot;
593 struct nfs4_slot_table *tbl;
45d43c29 594 u32 slotid;
fbcd4abc
AA		 595
596 dprintk("--> %s\n", __func__);
ce5039c1 597 /* slot already allocated? */
dfb4f309 598 if (res->sr_slot != NULL)
ce5039c1
AA		 599 return 0;
600
fbcd4abc
AA		 601 tbl = &session->fc_slot_table;
602
603 spin_lock(&tbl->slot_tbl_lock);
a2118c33 604 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 605 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 606 /* The state manager will wait until the slot table is empty */
05f0d236 607 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 608 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 609 dprintk("%s session is draining\n", __func__);
05f0d236 610 return -EAGAIN;
b069d94a
AA		 611 }
612
689cf5c1
AB		 613 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
614 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
615 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
616 spin_unlock(&tbl->slot_tbl_lock);
617 dprintk("%s enforce FIFO order\n", __func__);
618 return -EAGAIN;
619 }
620
40ead580 621 slotid = nfs4_find_slot(tbl);
45d43c29 622 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 623 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
624 spin_unlock(&tbl->slot_tbl_lock);
625 dprintk("<-- %s: no free slots\n", __func__);
626 return -EAGAIN;
627 }
628 spin_unlock(&tbl->slot_tbl_lock);
629
689cf5c1 630 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 631 slot = tbl->slots + slotid;
99fe60d0 632 args->sa_session = session;
fbcd4abc 633 args->sa_slotid = slotid;
fbcd4abc
AA		 634
635 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
636
99fe60d0 637 res->sr_session = session;
dfb4f309 638 res->sr_slot = slot;
fbcd4abc 639 res->sr_renewal_time = jiffies;
2a6e26cd 640 res->sr_status_flags = 0;
fbcd4abc
AA		 641 /*
642 * sr_status is only set in decode_sequence, and so will remain
643 * set to 1 if an rpc level failure occurs.
644 */
645 res->sr_status = 1;
ce5039c1
AA		 646 return 0;
647}
dc70d7b3 648EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 649
035168ab 650int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 651 struct nfs4_sequence_args *args,
652 struct nfs4_sequence_res *res,
ce5039c1
AA		 653 struct rpc_task *task)
654{
035168ab 655 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 656 int ret = 0;
657
9d12b216 658 if (session == NULL)
035168ab 659 goto out;
035168ab 660
12364a4f 661 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 662 __func__, session->clp, session, res->sr_slot ?
663 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 664
9d12b216 665 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 666out:
667 dprintk("<-- %s status=%d\n", __func__, ret);
668 return ret;
669}
670
671struct nfs41_call_sync_data {
035168ab 672 const struct nfs_server *seq_server;
ce5039c1
AA		 673 struct nfs4_sequence_args *seq_args;
674 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 675};
676
677static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
678{
679 struct nfs41_call_sync_data *data = calldata;
680
035168ab
TM		 681 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
682
683 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 684 data->seq_res, task))
ce5039c1
AA		 685 return;
686 rpc_call_start(task);
687}
688
b257957e
AB		 689static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
690{
691 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
692 nfs41_call_sync_prepare(task, calldata);
693}
694
69ab40c4
AA		 695static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
696{
697 struct nfs41_call_sync_data *data = calldata;
698
14516c3a 699 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 700}
701
17280175 702static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 703 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 704 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 705};
706
17280175 707static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 708 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
709 .rpc_call_done = nfs41_call_sync_done,
710};
711
7c513058
BS		 712static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
713 struct nfs_server *server,
ce5039c1
AA		 714 struct rpc_message *msg,
715 struct nfs4_sequence_args *args,
716 struct nfs4_sequence_res *res,
b257957e 717 int privileged)
ce5039c1
AA		 718{
719 int ret;
720 struct rpc_task *task;
721 struct nfs41_call_sync_data data = {
035168ab 722 .seq_server = server,
ce5039c1
AA		 723 .seq_args = args,
724 .seq_res = res,
ce5039c1
AA		 725 };
726 struct rpc_task_setup task_setup = {
7c513058 727 .rpc_client = clnt,
ce5039c1
AA		 728 .rpc_message = msg,
729 .callback_ops = &nfs41_call_sync_ops,
730 .callback_data = &data
731 };
732
b257957e
AB		 733 if (privileged)
734 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 735 task = rpc_run_task(&task_setup);
736 if (IS_ERR(task))
737 ret = PTR_ERR(task);
738 else {
739 ret = task->tk_status;
740 rpc_put_task(task);
741 }
742 return ret;
743}
744
7c513058
BS		 745int _nfs4_call_sync_session(struct rpc_clnt *clnt,
746 struct nfs_server *server,
cccef3b9
AA		 747 struct rpc_message *msg,
748 struct nfs4_sequence_args *args,
749 struct nfs4_sequence_res *res,
750 int cache_reply)
751{
9d12b216
TM		 752 nfs41_init_sequence(args, res, cache_reply);
753 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 754}
755
df896455 756#else
9d12b216
TM		 757static inline
758void nfs41_init_sequence(struct nfs4_sequence_args *args,
759 struct nfs4_sequence_res *res, int cache_reply)
760{
761}
762
14516c3a
TM		 763static int nfs4_sequence_done(struct rpc_task *task,
764 struct nfs4_sequence_res *res)
df896455 765{
14516c3a 766 return 1;
df896455 767}
cccef3b9
AA		 768#endif /* CONFIG_NFS_V4_1 */
769
7c513058
BS		 770int _nfs4_call_sync(struct rpc_clnt *clnt,
771 struct nfs_server *server,
cccef3b9
AA		 772 struct rpc_message *msg,
773 struct nfs4_sequence_args *args,
774 struct nfs4_sequence_res *res,
775 int cache_reply)
776{
9d12b216 777 nfs41_init_sequence(args, res, cache_reply);
7c513058 778 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 779}
780
e73b83f2 781static inline
7c513058
BS		 782int nfs4_call_sync(struct rpc_clnt *clnt,
783 struct nfs_server *server,
e73b83f2
BS		 784 struct rpc_message *msg,
785 struct nfs4_sequence_args *args,
786 struct nfs4_sequence_res *res,
787 int cache_reply)
788{
7c513058
BS		 789 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
790 args, res, cache_reply);
e73b83f2 791}
cccef3b9 792
38478b24 793static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 794{
38478b24 795 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 796
38478b24 797 spin_lock(&dir->i_lock);
359d7d1c 798 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 799 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 800 nfs_force_lookup_revalidate(dir);
a9a4a87a 801 dir->i_version = cinfo->after;
38478b24 802 spin_unlock(&dir->i_lock);
1da177e4
LT		 803}
804
e56e0b78 805struct nfs4_opendata {
c6d00e63 806 struct kref kref;
e56e0b78
TM		 807 struct nfs_openargs o_arg;
808 struct nfs_openres o_res;
cdd4e68b
TM		 809 struct nfs_open_confirmargs c_arg;
810 struct nfs_open_confirmres c_res;
6926afd1
TM		 811 struct nfs4_string owner_name;
812 struct nfs4_string group_name;
e56e0b78 813 struct nfs_fattr f_attr;
e56e0b78 814 struct dentry *dir;
82a2c1b7 815 struct dentry *dentry;
e56e0b78 816 struct nfs4_state_owner *owner;
aac00a8d 817 struct nfs4_state *state;
e56e0b78 818 struct iattr attrs;
26e976a8 819 unsigned long timestamp;
3e309914 820 unsigned int rpc_done : 1;
24ac23ab
TM		 821 int rpc_status;
822 int cancelled;
e56e0b78
TM		 823};
824
2ced46c2
TM		 825
826static void nfs4_init_opendata_res(struct nfs4_opendata *p)
827{
828 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 829 p->o_res.seqid = p->o_arg.seqid;
830 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 831 p->o_res.server = p->o_arg.server;
832 nfs_fattr_init(&p->f_attr);
6926afd1 833 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 834}
835
82a2c1b7 836static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 837 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 838 const struct iattr *attrs,
839 gfp_t gfp_mask)
e56e0b78 840{
82a2c1b7 841 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 842 struct inode *dir = parent->d_inode;
843 struct nfs_server *server = NFS_SERVER(dir);
844 struct nfs4_opendata *p;
845
8535b2be 846 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 847 if (p == NULL)
848 goto err;
8535b2be 849 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 850 if (p->o_arg.seqid == NULL)
851 goto err_free;
82a2c1b7
AV		 852 nfs_sb_active(dentry->d_sb);
853 p->dentry = dget(dentry);
e56e0b78
TM		 854 p->dir = parent;
855 p->owner = sp;
856 atomic_inc(&sp->so_count);
857 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 858 p->o_arg.open_flags = flags;
859 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 860 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 861 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
862 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 863 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 864 p->o_arg.server = server;
865 p->o_arg.bitmask = server->attr_bitmask;
1549210f 866 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 867 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 868 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 869 __be32 verf[2];
d77d76ff 870
e56e0b78
TM		 871 p->o_arg.u.attrs = &p->attrs;
872 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 873
874 verf[0] = jiffies;
875 verf[1] = current->pid;
876 memcpy(p->o_arg.u.verifier.data, verf,
877 sizeof(p->o_arg.u.verifier.data));
e56e0b78 878 }
cdd4e68b
TM		 879 p->c_arg.fh = &p->o_res.fh;
880 p->c_arg.stateid = &p->o_res.stateid;
881 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 882 nfs4_init_opendata_res(p);
c6d00e63 883 kref_init(&p->kref);
e56e0b78
TM		 884 return p;
885err_free:
886 kfree(p);
887err:
888 dput(parent);
889 return NULL;
890}
891
c6d00e63 892static void nfs4_opendata_free(struct kref *kref)
e56e0b78 893{
c6d00e63
TM		 894 struct nfs4_opendata *p = container_of(kref,
895 struct nfs4_opendata, kref);
82a2c1b7 896 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 897
898 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 899 if (p->state != NULL)
900 nfs4_put_open_state(p->state);
c6d00e63
TM		 901 nfs4_put_state_owner(p->owner);
902 dput(p->dir);
82a2c1b7
AV		 903 dput(p->dentry);
904 nfs_sb_deactive(sb);
6926afd1 905 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 906 kfree(p);
907}
908
909static void nfs4_opendata_put(struct nfs4_opendata *p)
910{
911 if (p != NULL)
912 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 913}
914
06f814a3
TM		 915static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
916{
06f814a3
TM		 917 int ret;
918
06f814a3 919 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 920 return ret;
921}
922
dc0b027d 923static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 924{
925 int ret = 0;
dc0b027d 926
536e43d1 927 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 928 goto out;
929 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 930 case FMODE_READ:
88069f77
TM		 931 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
932 && state->n_rdonly != 0;
6ee41268
TM		 933 break;
934 case FMODE_WRITE:
88069f77
TM		 935 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
936 && state->n_wronly != 0;
6ee41268
TM		 937 break;
938 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 939 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
940 && state->n_rdwr != 0;
6ee41268 941 }
dc0b027d 942out:
6ee41268
TM		 943 return ret;
944}
945
dc0b027d 946static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 947{
652f89f6
TM		 948 if (delegation == NULL)
949 return 0;
dc0b027d 950 if ((delegation->type & fmode) != fmode)
aac00a8d 951 return 0;
15c831bf 952 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 953 return 0;
b7391f44 954 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 955 return 1;
956}
957
dc0b027d 958static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 959{
dc0b027d 960 switch (fmode) {
e7616923
TM		 961 case FMODE_WRITE:
962 state->n_wronly++;
963 break;
964 case FMODE_READ:
965 state->n_rdonly++;
966 break;
967 case FMODE_READ|FMODE_WRITE:
968 state->n_rdwr++;
969 }
dc0b027d 970 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 971}
972
dc0b027d 973static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 974{
975 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 976 nfs4_stateid_copy(&state->stateid, stateid);
977 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 978 switch (fmode) {
003707c7
TM		 979 case FMODE_READ:
980 set_bit(NFS_O_RDONLY_STATE, &state->flags);
981 break;
982 case FMODE_WRITE:
983 set_bit(NFS_O_WRONLY_STATE, &state->flags);
984 break;
985 case FMODE_READ|FMODE_WRITE:
986 set_bit(NFS_O_RDWR_STATE, &state->flags);
987 }
e7616923
TM		 988}
989
dc0b027d 990static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 991{
8bda4e4c 992 write_seqlock(&state->seqlock);
dc0b027d 993 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 994 write_sequnlock(&state->seqlock);
003707c7
TM		 995}
996
dc0b027d 997static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 998{
8bda4e4c
TM		 999 /*
1000 * Protect the call to nfs4_state_set_mode_locked and
1001 * serialise the stateid update
1002 */
1003 write_seqlock(&state->seqlock);
003707c7 1004 if (deleg_stateid != NULL) {
f597c537 1005 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1006 set_bit(NFS_DELEGATED_STATE, &state->flags);
1007 }
1008 if (open_stateid != NULL)
dc0b027d 1009 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1010 write_sequnlock(&state->seqlock);
1011 spin_lock(&state->owner->so_lock);
dc0b027d 1012 update_open_stateflags(state, fmode);
ec073428 1013 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1014}
1015
dc0b027d 1016static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1017{
1018 struct nfs_inode *nfsi = NFS_I(state->inode);
1019 struct nfs_delegation *deleg_cur;
1020 int ret = 0;
1021
dc0b027d 1022 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1023
1024 rcu_read_lock();
1025 deleg_cur = rcu_dereference(nfsi->delegation);
1026 if (deleg_cur == NULL)
1027 goto no_delegation;
1028
1029 spin_lock(&deleg_cur->lock);
1030 if (nfsi->delegation != deleg_cur ||
dc0b027d 1031 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1032 goto no_delegation_unlock;
1033
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
f597c537 1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1037 goto no_delegation_unlock;
1038
b7391f44 1039 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1041 ret = 1;
1042no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1044no_delegation:
1045 rcu_read_unlock();
1046
1047 if (!ret && open_stateid != NULL) {
dc0b027d 1048 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1049 ret = 1;
1050 }
1051
1052 return ret;
1053}
1054
1055
dc0b027d 1056static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1057{
1058 struct nfs_delegation *delegation;
1059
1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1063 rcu_read_unlock();
1064 return;
1065 }
1066 rcu_read_unlock();
57ec14c5 1067 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1068}
1069
6ee41268 1070static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1071{
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
536e43d1 1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1076 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1077 nfs4_stateid stateid;
1078 int ret = -EAGAIN;
1079
aac00a8d 1080 for (;;) {
dc0b027d 1081 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1082 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
6ee41268 1085 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1086 goto out_return_state;
1087 }
1088 spin_unlock(&state->owner->so_lock);
1089 }
34310430
TM		 1090 rcu_read_lock();
1091 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1092 if (!can_open_delegated(delegation, fmode)) {
34310430 1093 rcu_read_unlock();
aac00a8d 1094 break;
34310430 1095 }
aac00a8d 1096 /* Save the delegation */
f597c537 1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1098 rcu_read_unlock();
af22f94a 1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1100 if (ret != 0)
1101 goto out;
1102 ret = -EAGAIN;
34310430
TM		 1103
1104 /* Try to update the stateid using the delegation */
dc0b027d 1105 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1106 goto out_return_state;
aac00a8d 1107 }
aac00a8d
TM		 1108out:
1109 return ERR_PTR(ret);
1110out_return_state:
1111 atomic_inc(&state->count);
1112 return state;
1113}
1114
24ac23ab
TM		 1115static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1116{
1117 struct inode *inode;
1118 struct nfs4_state *state = NULL;
003707c7 1119 struct nfs_delegation *delegation;
1b370bc2 1120 int ret;
24ac23ab 1121
aac00a8d 1122 if (!data->rpc_done) {
6ee41268 1123 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1124 goto out;
1125 }
1126
1b370bc2 1127 ret = -EAGAIN;
24ac23ab 1128 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1129 goto err;
24ac23ab 1130 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1131 ret = PTR_ERR(inode);
03f28e3a 1132 if (IS_ERR(inode))
1b370bc2
TM		 1133 goto err;
1134 ret = -ENOMEM;
24ac23ab
TM		 1135 state = nfs4_get_open_state(inode, data->owner);
1136 if (state == NULL)
1b370bc2 1137 goto err_put_inode;
549d6ed5 1138 if (data->o_res.delegation_type != 0) {
4e0038b6 1139 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1140 int delegation_flags = 0;
1141
003707c7
TM		 1142 rcu_read_lock();
1143 delegation = rcu_dereference(NFS_I(inode)->delegation);
1144 if (delegation)
1145 delegation_flags = delegation->flags;
1146 rcu_read_unlock();
652f89f6
TM		 1147 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1148 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1149 "returning a delegation for "
1150 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1151 clp->cl_hostname);
652f89f6 1152 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1153 nfs_inode_set_delegation(state->inode,
1154 data->owner->so_cred,
1155 &data->o_res);
1156 else
1157 nfs_inode_reclaim_delegation(state->inode,
1158 data->owner->so_cred,
1159 &data->o_res);
1160 }
34310430
TM		 1161
1162 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1163 data->o_arg.fmode);
24ac23ab 1164 iput(inode);
aac00a8d 1165out:
24ac23ab 1166 return state;
1b370bc2
TM		 1167err_put_inode:
1168 iput(inode);
1169err:
1170 return ERR_PTR(ret);
24ac23ab
TM		 1171}
1172
864472e9
TM		 1173static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1174{
1175 struct nfs_inode *nfsi = NFS_I(state->inode);
1176 struct nfs_open_context *ctx;
1177
1178 spin_lock(&state->inode->i_lock);
1179 list_for_each_entry(ctx, &nfsi->open_files, list) {
1180 if (ctx->state != state)
1181 continue;
1182 get_nfs_open_context(ctx);
1183 spin_unlock(&state->inode->i_lock);
1184 return ctx;
1185 }
1186 spin_unlock(&state->inode->i_lock);
1187 return ERR_PTR(-ENOENT);
1188}
1189
6f220ed5
TM		 1190static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1191{
1192 struct nfs4_opendata *opendata;
1193
3d4ff43d 1194 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1195 if (opendata == NULL)
1196 return ERR_PTR(-ENOMEM);
1197 opendata->state = state;
1198 atomic_inc(&state->count);
1199 return opendata;
1200}
1201
dc0b027d 1202static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1203{
2ced46c2 1204 struct nfs4_state *newstate;
864472e9
TM		 1205 int ret;
1206
dc0b027d
TM		 1207 opendata->o_arg.open_flags = 0;
1208 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1209 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1210 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1211 nfs4_init_opendata_res(opendata);
b257957e 1212 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1213 if (ret != 0)
1214 return ret;
2ced46c2 1215 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1216 if (IS_ERR(newstate))
1217 return PTR_ERR(newstate);
643168c2 1218 nfs4_close_state(newstate, fmode);
2ced46c2 1219 *res = newstate;
864472e9
TM		 1220 return 0;
1221}
1222
1223static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1224{
864472e9 1225 struct nfs4_state *newstate;
864472e9
TM		 1226 int ret;
1227
1228 /* memory barrier prior to reading state->n_* */
2ced46c2 1229 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1230 smp_rmb();
1231 if (state->n_rdwr != 0) {
b0ed9dbc 1232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1233 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1234 if (ret != 0)
1235 return ret;
2ced46c2
TM		 1236 if (newstate != state)
1237 return -ESTALE;
864472e9
TM		 1238 }
1239 if (state->n_wronly != 0) {
b0ed9dbc 1240 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1241 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1242 if (ret != 0)
1243 return ret;
2ced46c2
TM		 1244 if (newstate != state)
1245 return -ESTALE;
864472e9
TM		 1246 }
1247 if (state->n_rdonly != 0) {
b0ed9dbc 1248 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1249 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1250 if (ret != 0)
1251 return ret;
2ced46c2
TM		 1252 if (newstate != state)
1253 return -ESTALE;
864472e9 1254 }
1ac7e2fd
TM		 1255 /*
1256 * We may have performed cached opens for all three recoveries.
1257 * Check if we need to update the current stateid.
1258 */
1259 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1260 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1261 write_seqlock(&state->seqlock);
1ac7e2fd 1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1263 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1264 write_sequnlock(&state->seqlock);
1ac7e2fd 1265 }
864472e9
TM		 1266 return 0;
1267}
1268
1da177e4
LT		 1269/*
1270 * OPEN_RECLAIM:
1271 * reclaim state on the server after a reboot.
1da177e4 1272 */
539cd03a 1273static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1274{
1ac7e2fd 1275 struct nfs_delegation *delegation;
864472e9 1276 struct nfs4_opendata *opendata;
dc0b027d 1277 fmode_t delegation_type = 0;
1da177e4
LT		 1278 int status;
1279
6f220ed5
TM		 1280 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1281 if (IS_ERR(opendata))
1282 return PTR_ERR(opendata);
864472e9
TM		 1283 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1284 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1285 rcu_read_lock();
1286 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1287 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1288 delegation_type = delegation->type;
1ac7e2fd 1289 rcu_read_unlock();
864472e9
TM		 1290 opendata->o_arg.u.delegation_type = delegation_type;
1291 status = nfs4_open_recover(opendata, state);
c6d00e63 1292 nfs4_opendata_put(opendata);
1da177e4
LT		 1293 return status;
1294}
1295
539cd03a 1296static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1297{
1298 struct nfs_server *server = NFS_SERVER(state->inode);
1299 struct nfs4_exception exception = { };
1300 int err;
1301 do {
539cd03a 1302 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1303 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1304 break;
1305 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1306 } while (exception.retry);
1307 return err;
1308}
1309
864472e9
TM		 1310static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1311{
1312 struct nfs_open_context *ctx;
1313 int ret;
1314
1315 ctx = nfs4_state_find_open_context(state);
1316 if (IS_ERR(ctx))
1317 return PTR_ERR(ctx);
539cd03a 1318 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1319 put_nfs_open_context(ctx);
1320 return ret;
1321}
1322
13437e12 1323static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1324{
e56e0b78 1325 struct nfs4_opendata *opendata;
864472e9 1326 int ret;
1da177e4 1327
6f220ed5
TM		 1328 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1329 if (IS_ERR(opendata))
1330 return PTR_ERR(opendata);
e56e0b78 1331 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1332 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1333 ret = nfs4_open_recover(opendata, state);
c6d00e63 1334 nfs4_opendata_put(opendata);
864472e9 1335 return ret;
1da177e4
LT		 1336}
1337
13437e12 1338int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1339{
1340 struct nfs4_exception exception = { };
539cd03a 1341 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1342 int err;
1343 do {
13437e12 1344 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1345 switch (err) {
1346 case 0:
965b5d67
TM		 1347 case -ENOENT:
1348 case -ESTALE:
1349 goto out;
bcfa49f6
RL		 1350 case -NFS4ERR_BADSESSION:
1351 case -NFS4ERR_BADSLOT:
1352 case -NFS4ERR_BAD_HIGH_SLOT:
1353 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1354 case -NFS4ERR_DEADSESSION:
9f594791 1355 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1356 goto out;
1da177e4
LT		 1357 case -NFS4ERR_STALE_CLIENTID:
1358 case -NFS4ERR_STALE_STATEID:
1359 case -NFS4ERR_EXPIRED:
1360 /* Don't recall a delegation if it was lost */
0400a6b0 1361 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1362 goto out;
1363 case -ERESTARTSYS:
1364 /*
1365 * The show must go on: exit, but mark the
1366 * stateid as needing recovery.
1367 */
a1d0b5ee 1368 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1369 case -NFS4ERR_ADMIN_REVOKED:
1370 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1371 nfs_inode_find_state_and_recover(state->inode,
1372 stateid);
0400a6b0 1373 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1374 case -EKEYEXPIRED:
1375 /*
1376 * User RPCSEC_GSS context has expired.
1377 * We cannot recover this stateid now, so
1378 * skip it and allow recovery thread to
1379 * proceed.
1380 */
965b5d67
TM		 1381 case -ENOMEM:
1382 err = 0;
1383 goto out;
1da177e4
LT		 1384 }
1385 err = nfs4_handle_exception(server, err, &exception);
1386 } while (exception.retry);
965b5d67 1387out:
1da177e4
LT		 1388 return err;
1389}
1390
cdd4e68b
TM		 1391static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1392{
1393 struct nfs4_opendata *data = calldata;
1394
1395 data->rpc_status = task->tk_status;
26e976a8 1396 if (data->rpc_status == 0) {
f597c537 1397 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1398 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1399 renew_lease(data->o_res.server, data->timestamp);
3e309914 1400 data->rpc_done = 1;
26e976a8 1401 }
cdd4e68b
TM		 1402}
1403
1404static void nfs4_open_confirm_release(void *calldata)
1405{
1406 struct nfs4_opendata *data = calldata;
1407 struct nfs4_state *state = NULL;
1408
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data->cancelled == 0)
1411 goto out_free;
1412 /* In case of error, no cleanup! */
3e309914 1413 if (!data->rpc_done)
cdd4e68b 1414 goto out_free;
cdd4e68b 1415 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1416 if (!IS_ERR(state))
643168c2 1417 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1418out_free:
c6d00e63 1419 nfs4_opendata_put(data);
cdd4e68b
TM		 1420}
1421
1422static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1423 .rpc_call_done = nfs4_open_confirm_done,
1424 .rpc_release = nfs4_open_confirm_release,
1425};
1426
1427/*
1428 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1429 */
1430static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1431{
1432 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1433 struct rpc_task *task;
5138fde0
TM		 1434 struct rpc_message msg = {
1435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1436 .rpc_argp = &data->c_arg,
1437 .rpc_resp = &data->c_res,
1438 .rpc_cred = data->owner->so_cred,
1439 };
c970aa85
TM		 1440 struct rpc_task_setup task_setup_data = {
1441 .rpc_client = server->client,
5138fde0 1442 .rpc_message = &msg,
c970aa85
TM		 1443 .callback_ops = &nfs4_open_confirm_ops,
1444 .callback_data = data,
101070ca 1445 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1446 .flags = RPC_TASK_ASYNC,
1447 };
1da177e4
LT		 1448 int status;
1449
c6d00e63 1450 kref_get(&data->kref);
3e309914
TM		 1451 data->rpc_done = 0;
1452 data->rpc_status = 0;
5138fde0 1453 data->timestamp = jiffies;
c970aa85 1454 task = rpc_run_task(&task_setup_data);
7a1218a2 1455 if (IS_ERR(task))
cdd4e68b 1456 return PTR_ERR(task);
cdd4e68b
TM		 1457 status = nfs4_wait_for_completion_rpc_task(task);
1458 if (status != 0) {
1459 data->cancelled = 1;
1460 smp_wmb();
1461 } else
1462 status = data->rpc_status;
e6b3c4db 1463 rpc_put_task(task);
1da177e4
LT		 1464 return status;
1465}
1466
24ac23ab 1467static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1468{
24ac23ab
TM		 1469 struct nfs4_opendata *data = calldata;
1470 struct nfs4_state_owner *sp = data->owner;
5138fde0 1471
24ac23ab
TM		 1472 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1473 return;
aac00a8d
TM		 1474 /*
1475 * Check if we still need to send an OPEN call, or if we can use
1476 * a delegation instead.
1477 */
1478 if (data->state != NULL) {
1479 struct nfs_delegation *delegation;
1480
dc0b027d 1481 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1482 goto out_no_action;
aac00a8d
TM		 1483 rcu_read_lock();
1484 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1485 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1486 can_open_delegated(delegation, data->o_arg.fmode))
1487 goto unlock_no_action;
aac00a8d
TM		 1488 rcu_read_unlock();
1489 }
95b72eb0 1490 /* Update client id. */
1f0e890d 1491 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1492 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1493 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1494 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1495 }
26e976a8 1496 data->timestamp = jiffies;
035168ab 1497 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1498 &data->o_arg.seq_args,
9d12b216 1499 &data->o_res.seq_res, task))
d898528c 1500 return;
5138fde0 1501 rpc_call_start(task);
6ee41268 1502 return;
652f89f6
TM		 1503unlock_no_action:
1504 rcu_read_unlock();
6ee41268
TM		 1505out_no_action:
1506 task->tk_action = NULL;
1507
24ac23ab 1508}
1da177e4 1509
b257957e
AB		 1510static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1511{
1512 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1513 nfs4_open_prepare(task, calldata);
1514}
1515
24ac23ab
TM		 1516static void nfs4_open_done(struct rpc_task *task, void *calldata)
1517{
1518 struct nfs4_opendata *data = calldata;
1da177e4 1519
24ac23ab 1520 data->rpc_status = task->tk_status;
d898528c 1521
14516c3a
TM		 1522 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1523 return;
d898528c 1524
24ac23ab
TM		 1525 if (task->tk_status == 0) {
1526 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1527 case S_IFREG:
1528 break;
1529 case S_IFLNK:
24ac23ab 1530 data->rpc_status = -ELOOP;
6f926b5b
TM		 1531 break;
1532 case S_IFDIR:
24ac23ab 1533 data->rpc_status = -EISDIR;
6f926b5b
TM		 1534 break;
1535 default:
24ac23ab 1536 data->rpc_status = -ENOTDIR;
6f926b5b 1537 }
26e976a8 1538 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1539 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1540 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1541 }
3e309914 1542 data->rpc_done = 1;
24ac23ab 1543}
6f926b5b 1544
24ac23ab
TM		 1545static void nfs4_open_release(void *calldata)
1546{
1547 struct nfs4_opendata *data = calldata;
1548 struct nfs4_state *state = NULL;
1549
1550 /* If this request hasn't been cancelled, do nothing */
1551 if (data->cancelled == 0)
1552 goto out_free;
1553 /* In case of error, no cleanup! */
3e309914 1554 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1555 goto out_free;
1556 /* In case we need an open_confirm, no cleanup! */
1557 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1558 goto out_free;
24ac23ab 1559 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1560 if (!IS_ERR(state))
643168c2 1561 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1562out_free:
c6d00e63 1563 nfs4_opendata_put(data);
24ac23ab
TM		 1564}
1565
1566static const struct rpc_call_ops nfs4_open_ops = {
1567 .rpc_call_prepare = nfs4_open_prepare,
1568 .rpc_call_done = nfs4_open_done,
1569 .rpc_release = nfs4_open_release,
1570};
1571
b257957e
AB		 1572static const struct rpc_call_ops nfs4_recover_open_ops = {
1573 .rpc_call_prepare = nfs4_recover_open_prepare,
1574 .rpc_call_done = nfs4_open_done,
1575 .rpc_release = nfs4_open_release,
1576};
1577
1578static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1579{
1580 struct inode *dir = data->dir->d_inode;
1581 struct nfs_server *server = NFS_SERVER(dir);
1582 struct nfs_openargs *o_arg = &data->o_arg;
1583 struct nfs_openres *o_res = &data->o_res;
1584 struct rpc_task *task;
5138fde0
TM		 1585 struct rpc_message msg = {
1586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1587 .rpc_argp = o_arg,
1588 .rpc_resp = o_res,
1589 .rpc_cred = data->owner->so_cred,
1590 };
c970aa85
TM		 1591 struct rpc_task_setup task_setup_data = {
1592 .rpc_client = server->client,
5138fde0 1593 .rpc_message = &msg,
c970aa85
TM		 1594 .callback_ops = &nfs4_open_ops,
1595 .callback_data = data,
101070ca 1596 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1597 .flags = RPC_TASK_ASYNC,
1598 };
24ac23ab
TM		 1599 int status;
1600
9d12b216 1601 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1602 kref_get(&data->kref);
3e309914
TM		 1603 data->rpc_done = 0;
1604 data->rpc_status = 0;
2ced46c2 1605 data->cancelled = 0;
b257957e
AB		 1606 if (isrecover)
1607 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1608 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1609 if (IS_ERR(task))
1610 return PTR_ERR(task);
1611 status = nfs4_wait_for_completion_rpc_task(task);
1612 if (status != 0) {
1613 data->cancelled = 1;
1614 smp_wmb();
1615 } else
1616 status = data->rpc_status;
1617 rpc_put_task(task);
1618
1619 return status;
1620}
1621
1622static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1623{
1624 struct inode *dir = data->dir->d_inode;
1625 struct nfs_openres *o_res = &data->o_res;
1626 int status;
1627
1628 status = nfs4_run_open_task(data, 1);
1629 if (status != 0 || !data->rpc_done)
1630 return status;
1631
6926afd1
TM		 1632 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1633
b257957e
AB		 1634 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1635 status = _nfs4_proc_open_confirm(data);
1636 if (status != 0)
1637 return status;
1638 }
1639
1640 return status;
1641}
1642
1643/*
1644 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1645 */
1646static int _nfs4_proc_open(struct nfs4_opendata *data)
1647{
1648 struct inode *dir = data->dir->d_inode;
1649 struct nfs_server *server = NFS_SERVER(dir);
1650 struct nfs_openargs *o_arg = &data->o_arg;
1651 struct nfs_openres *o_res = &data->o_res;
1652 int status;
1653
1654 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1655 if (!data->rpc_done)
1656 return status;
1657 if (status != 0) {
1658 if (status == -NFS4ERR_BADNAME &&
1659 !(o_arg->open_flags & O_CREAT))
1660 return -ENOENT;
24ac23ab 1661 return status;
08ef7bd3 1662 }
24ac23ab 1663
6926afd1
TM		 1664 nfs_fattr_map_and_free_names(server, &data->f_attr);
1665
90ff0c54 1666 if (o_arg->open_flags & O_CREAT)
56ae19f3 1667 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1668 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1669 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1670 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1671 status = _nfs4_proc_open_confirm(data);
1da177e4 1672 if (status != 0)
24ac23ab 1673 return status;
1da177e4
LT		 1674 }
1675 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1676 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1677 return 0;
1da177e4
LT		 1678}
1679
d83217c1 1680static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1681{
a78cb57a 1682 unsigned int loop;
6b30954e 1683 int ret;
58d9714a 1684
a78cb57a 1685 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1686 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1687 if (ret != 0)
a78cb57a 1688 break;
e598d843
TM		 1689 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1690 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1691 break;
0400a6b0 1692 nfs4_schedule_state_manager(clp);
a78cb57a 1693 ret = -EIO;
6b30954e 1694 }
a78cb57a 1695 return ret;
58d9714a
TM		 1696}
1697
d83217c1
AA		 1698static int nfs4_recover_expired_lease(struct nfs_server *server)
1699{
1700 return nfs4_client_recover_expired_lease(server->nfs_client);
1701}
1702
1da177e4
LT		 1703/*
1704 * OPEN_EXPIRED:
1705 * reclaim state on the server after a network partition.
1706 * Assumes caller holds the appropriate lock
1707 */
539cd03a 1708static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1709{
e56e0b78 1710 struct nfs4_opendata *opendata;
864472e9 1711 int ret;
1da177e4 1712
6f220ed5
TM		 1713 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1714 if (IS_ERR(opendata))
1715 return PTR_ERR(opendata);
864472e9 1716 ret = nfs4_open_recover(opendata, state);
35d05778 1717 if (ret == -ESTALE)
3d4ff43d 1718 d_drop(ctx->dentry);
c6d00e63 1719 nfs4_opendata_put(opendata);
864472e9 1720 return ret;
1da177e4
LT		 1721}
1722
a9ed2e25 1723static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1724{
539cd03a 1725 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1726 struct nfs4_exception exception = { };
1727 int err;
1728
1729 do {
539cd03a 1730 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1731 switch (err) {
1732 default:
1733 goto out;
1734 case -NFS4ERR_GRACE:
1735 case -NFS4ERR_DELAY:
1736 nfs4_handle_exception(server, err, &exception);
1737 err = 0;
1738 }
202b50dc 1739 } while (exception.retry);
a9ed2e25 1740out:
202b50dc
TM		 1741 return err;
1742}
1743
1da177e4
LT		 1744static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1745{
1da177e4 1746 struct nfs_open_context *ctx;
864472e9 1747 int ret;
1da177e4 1748
864472e9
TM		 1749 ctx = nfs4_state_find_open_context(state);
1750 if (IS_ERR(ctx))
1751 return PTR_ERR(ctx);
539cd03a 1752 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1753 put_nfs_open_context(ctx);
1754 return ret;
1da177e4
LT		 1755}
1756
f062eb6c 1757#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1758static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1759{
f062eb6c 1760 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1761 nfs4_stateid *stateid = &state->stateid;
1762 int status;
1763
1764 /* If a state reset has been done, test_stateid is unneeded */
1765 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1766 return;
1767
1768 status = nfs41_test_stateid(server, stateid);
1769 if (status != NFS_OK) {
1770 /* Free the stateid unless the server explicitly
1771 * informs us the stateid is unrecognized. */
1772 if (status != -NFS4ERR_BAD_STATEID)
1773 nfs41_free_stateid(server, stateid);
1774
1775 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1776 }
1777}
1778
1779/**
1780 * nfs41_check_open_stateid - possibly free an open stateid
1781 *
1782 * @state: NFSv4 state for an inode
1783 *
1784 * Returns NFS_OK if recovery for this stateid is now finished.
1785 * Otherwise a negative NFS4ERR value is returned.
1786 */
1787static int nfs41_check_open_stateid(struct nfs4_state *state)
1788{
1789 struct nfs_server *server = NFS_SERVER(state->inode);
1790 nfs4_stateid *stateid = &state->stateid;
1791 int status;
1792
1793 /* If a state reset has been done, test_stateid is unneeded */
1794 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1795 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1796 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1797 return -NFS4ERR_BAD_STATEID;
1798
1799 status = nfs41_test_stateid(server, stateid);
1800 if (status != NFS_OK) {
1801 /* Free the stateid unless the server explicitly
1802 * informs us the stateid is unrecognized. */
1803 if (status != -NFS4ERR_BAD_STATEID)
1804 nfs41_free_stateid(server, stateid);
1805
1806 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1807 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1808 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1809 }
1810 return status;
1811}
1812
1813static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1814{
eb64cf96 1815 int status;
b01dd1d8 1816
3e60ffdd
CL		 1817 nfs41_clear_delegation_stateid(state);
1818 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1819 if (status != NFS_OK)
1820 status = nfs4_open_expired(sp, state);
1821 return status;
f062eb6c
BS		 1822}
1823#endif
1824
aa53ed54
JL		 1825/*
1826 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1827 * fields corresponding to attributes that were used to store the verifier.
1828 * Make sure we clobber those fields in the later setattr call
1829 */
1830static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1831{
1832 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1833 !(sattr->ia_valid & ATTR_ATIME_SET))
1834 sattr->ia_valid |= ATTR_ATIME;
1835
1836 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1837 !(sattr->ia_valid & ATTR_MTIME_SET))
1838 sattr->ia_valid |= ATTR_MTIME;
1839}
1840
1da177e4 1841/*
24ac23ab 1842 * Returns a referenced nfs4_state
1da177e4 1843 */
82be417a
AA		 1844static int _nfs4_do_open(struct inode *dir,
1845 struct dentry *dentry,
1846 fmode_t fmode,
1847 int flags,
1848 struct iattr *sattr,
1849 struct rpc_cred *cred,
1850 struct nfs4_state **res,
1851 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1852{
1853 struct nfs4_state_owner *sp;
1854 struct nfs4_state *state = NULL;
1855 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1856 struct nfs4_opendata *opendata;
aac00a8d 1857 int status;
1da177e4
LT		 1858
1859 /* Protect against reboot recovery conflicts */
1da177e4 1860 status = -ENOMEM;
d1e284d5
TM		 1861 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1862 if (sp == NULL) {
1da177e4
LT		 1863 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1864 goto out_err;
1865 }
58d9714a
TM		 1866 status = nfs4_recover_expired_lease(server);
1867 if (status != 0)
b4454fe1 1868 goto err_put_state_owner;
82a2c1b7
AV		 1869 if (dentry->d_inode != NULL)
1870 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1871 status = -ENOMEM;
82a2c1b7 1872 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1873 if (opendata == NULL)
95d35cb4 1874 goto err_put_state_owner;
1da177e4 1875
82be417a
AA		 1876 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1877 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1878 if (!opendata->f_attr.mdsthreshold)
1879 goto err_opendata_put;
1549210f 1880 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1881 }
82a2c1b7
AV		 1882 if (dentry->d_inode != NULL)
1883 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1884
24ac23ab 1885 status = _nfs4_proc_open(opendata);
1da177e4 1886 if (status != 0)
c6d00e63 1887 goto err_opendata_put;
1da177e4 1888
24ac23ab 1889 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1890 status = PTR_ERR(state);
1891 if (IS_ERR(state))
c6d00e63 1892 goto err_opendata_put;
0df5dd4a 1893 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1894 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1895
1896 if (opendata->o_arg.open_flags & O_EXCL) {
1897 nfs4_exclusive_attrset(opendata, sattr);
1898
1899 nfs_fattr_init(opendata->o_res.f_attr);
1900 status = nfs4_do_setattr(state->inode, cred,
1901 opendata->o_res.f_attr, sattr,
1902 state);
1903 if (status == 0)
1904 nfs_setattr_update_inode(state->inode, sattr);
1905 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1906 }
82be417a
AA		 1907
1908 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1909 *ctx_th = opendata->f_attr.mdsthreshold;
1910 else
1911 kfree(opendata->f_attr.mdsthreshold);
1912 opendata->f_attr.mdsthreshold = NULL;
1913
c6d00e63 1914 nfs4_opendata_put(opendata);
1da177e4 1915 nfs4_put_state_owner(sp);
1da177e4
LT		 1916 *res = state;
1917 return 0;
c6d00e63 1918err_opendata_put:
82be417a 1919 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1920 nfs4_opendata_put(opendata);
e56e0b78
TM		 1921err_put_state_owner:
1922 nfs4_put_state_owner(sp);
1da177e4 1923out_err:
1da177e4
LT		 1924 *res = NULL;
1925 return status;
1926}
1927
1928
82be417a
AA		 1929static struct nfs4_state *nfs4_do_open(struct inode *dir,
1930 struct dentry *dentry,
1931 fmode_t fmode,
1932 int flags,
1933 struct iattr *sattr,
1934 struct rpc_cred *cred,
1935 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1936{
1937 struct nfs4_exception exception = { };
1938 struct nfs4_state *res;
1939 int status;
1940
2d0dbc6a 1941 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1942 do {
82be417a
AA		 1943 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1944 &res, ctx_th);
1da177e4
LT		 1945 if (status == 0)
1946 break;
1947 /* NOTE: BAD_SEQID means the server and client disagree about the
1948 * book-keeping w.r.t. state-changing operations
1949 * (OPEN/CLOSE/LOCK/LOCKU...)
1950 * It is actually a sign of a bug on the client or on the server.
1951 *
1952 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1953 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1954 * have unhashed the old state_owner for us, and that we can
1955 * therefore safely retry using a new one. We should still warn
1956 * the user though...
1957 */
1958 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1959 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1960 " returned a bad sequence-id error!\n",
1961 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1962 exception.retry = 1;
1963 continue;
1964 }
550f5747
TM		 1965 /*
1966 * BAD_STATEID on OPEN means that the server cancelled our
1967 * state before it received the OPEN_CONFIRM.
1968 * Recover by retrying the request as per the discussion
1969 * on Page 181 of RFC3530.
1970 */
1971 if (status == -NFS4ERR_BAD_STATEID) {
1972 exception.retry = 1;
1973 continue;
1974 }
aac00a8d
TM		 1975 if (status == -EAGAIN) {
1976 /* We must have found a delegation */
1977 exception.retry = 1;
1978 continue;
1979 }
1da177e4
LT		 1980 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1981 status, &exception));
1982 } while (exception.retry);
1983 return res;
1984}
1985
659bfcd6
TM		 1986static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1987 struct nfs_fattr *fattr, struct iattr *sattr,
1988 struct nfs4_state *state)
1da177e4 1989{
3e4f6290 1990 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1991 struct nfs_setattrargs arg = {
3e4f6290 1992 .fh = NFS_FH(inode),
1da177e4
LT		 1993 .iap = sattr,
1994 .server = server,
1995 .bitmask = server->attr_bitmask,
1996 };
1997 struct nfs_setattrres res = {
1998 .fattr = fattr,
1999 .server = server,
2000 };
2001 struct rpc_message msg = {
659bfcd6
TM		 2002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2003 .rpc_argp = &arg,
2004 .rpc_resp = &res,
2005 .rpc_cred = cred,
1da177e4 2006 };
26e976a8 2007 unsigned long timestamp = jiffies;
65e4308d 2008 int status;
1da177e4 2009
0e574af1 2010 nfs_fattr_init(fattr);
1da177e4 2011
4fc8796d
TM		 2012 if (state != NULL) {
2013 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2014 current->files, current->tgid);
2015 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2016 FMODE_WRITE)) {
3e4f6290 2017 /* Use that stateid */
08e9eac4 2018 } else
f597c537 2019 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2020
7c513058 2021 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2022 if (status == 0 && state != NULL)
2023 renew_lease(server, timestamp);
65e4308d 2024 return status;
1da177e4
LT		 2025}
2026
659bfcd6
TM		 2027static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2028 struct nfs_fattr *fattr, struct iattr *sattr,
2029 struct nfs4_state *state)
1da177e4 2030{
3e4f6290 2031 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2032 struct nfs4_exception exception = {
2033 .state = state,
3114ea7a 2034 .inode = inode,
a1d0b5ee 2035 };
1da177e4
LT		 2036 int err;
2037 do {
451146be
TM		 2038 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2039 switch (err) {
2040 case -NFS4ERR_OPENMODE:
2041 if (state && !(state->state & FMODE_WRITE)) {
2042 err = -EBADF;
2043 if (sattr->ia_valid & ATTR_OPEN)
2044 err = -EACCES;
2045 goto out;
2046 }
2047 }
2048 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2049 } while (exception.retry);
451146be 2050out:
1da177e4
LT		 2051 return err;
2052}
2053
2054struct nfs4_closedata {
2055 struct inode *inode;
2056 struct nfs4_state *state;
2057 struct nfs_closeargs arg;
2058 struct nfs_closeres res;
516a6af6 2059 struct nfs_fattr fattr;
26e976a8 2060 unsigned long timestamp;
f7e8917a
FI		 2061 bool roc;
2062 u32 roc_barrier;
1da177e4
LT		 2063};
2064
963d8fe5 2065static void nfs4_free_closedata(void *data)
9512135d 2066{
963d8fe5
TM		 2067 struct nfs4_closedata *calldata = data;
2068 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2069 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2070
f7e8917a
FI		 2071 if (calldata->roc)
2072 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2073 nfs4_put_open_state(calldata->state);
2074 nfs_free_seqid(calldata->arg.seqid);
9512135d 2075 nfs4_put_state_owner(sp);
643168c2 2076 nfs_sb_deactive(sb);
9512135d
TM		 2077 kfree(calldata);
2078}
2079
88069f77
TM		 2080static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2081 fmode_t fmode)
2082{
2083 spin_lock(&state->owner->so_lock);
2084 if (!(fmode & FMODE_READ))
2085 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2086 if (!(fmode & FMODE_WRITE))
2087 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2088 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2089 spin_unlock(&state->owner->so_lock);
2090}
2091
963d8fe5 2092static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2093{
963d8fe5 2094 struct nfs4_closedata *calldata = data;
1da177e4 2095 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2096 struct nfs_server *server = NFS_SERVER(calldata->inode);
2097
a3ca5651 2098 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2099 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2100 return;
1da177e4
LT		 2101 /* hmm. we are done with the inode, and in the process of freeing
2102 * the state_owner. we keep this around to process errors
2103 */
1da177e4
LT		 2104 switch (task->tk_status) {
2105 case 0:
f7e8917a
FI		 2106 if (calldata->roc)
2107 pnfs_roc_set_barrier(state->inode,
2108 calldata->roc_barrier);
45328c35 2109 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2110 renew_lease(server, calldata->timestamp);
88069f77
TM		 2111 nfs4_close_clear_stateid_flags(state,
2112 calldata->arg.fmode);
1da177e4
LT		 2113 break;
2114 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2115 case -NFS4ERR_OLD_STATEID:
2116 case -NFS4ERR_BAD_STATEID:
1da177e4 2117 case -NFS4ERR_EXPIRED:
dc0b027d 2118 if (calldata->arg.fmode == 0)
9e33bed5 2119 break;
1da177e4 2120 default:
72211dbe
TM		 2121 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2122 rpc_restart_call_prepare(task);
1da177e4 2123 }
72211dbe 2124 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2125 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2126 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2127}
2128
4ce70ada 2129static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2130{
4ce70ada 2131 struct nfs4_closedata *calldata = data;
9512135d 2132 struct nfs4_state *state = calldata->state;
88069f77 2133 int call_close = 0;
9512135d 2134
a3ca5651 2135 dprintk("%s: begin!\n", __func__);
963d8fe5 2136 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2137 return;
003707c7 2138
88069f77
TM		 2139 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2140 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2141 spin_lock(&state->owner->so_lock);
003707c7 2142 /* Calculate the change in open mode */
e7616923 2143 if (state->n_rdwr == 0) {
003707c7 2144 if (state->n_rdonly == 0) {
88069f77
TM		 2145 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2146 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2147 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2148 }
2149 if (state->n_wronly == 0) {
88069f77
TM		 2150 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2151 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2152 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2153 }
e7616923 2154 }
4cecb76f 2155 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2156
2157 if (!call_close) {
963d8fe5
TM		 2158 /* Note: exit _without_ calling nfs4_close_done */
2159 task->tk_action = NULL;
a3ca5651 2160 goto out;
9512135d 2161 }
88069f77 2162
f7e8917a 2163 if (calldata->arg.fmode == 0) {
88069f77 2164 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2165 if (calldata->roc &&
2166 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2167 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2168 task, NULL);
a3ca5651 2169 goto out;
f7e8917a
FI		 2170 }
2171 }
88069f77 2172
516a6af6 2173 nfs_fattr_init(calldata->res.fattr);
26e976a8 2174 calldata->timestamp = jiffies;
035168ab 2175 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2176 &calldata->arg.seq_args,
2177 &calldata->res.seq_res,
2178 task))
a3ca5651 2179 goto out;
5138fde0 2180 rpc_call_start(task);
a3ca5651
CL		 2181out:
2182 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2183}
2184
963d8fe5 2185static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2186 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2187 .rpc_call_done = nfs4_close_done,
2188 .rpc_release = nfs4_free_closedata,
2189};
2190
1da177e4
LT		 2191/*
2192 * It is possible for data to be read/written from a mem-mapped file
2193 * after the sys_close call (which hits the vfs layer as a flush).
2194 * This means that we can't safely call nfsv4 close on a file until
2195 * the inode is cleared. This in turn means that we are not good
2196 * NFSv4 citizens - we do not indicate to the server to update the file's
2197 * share state even when we are done with one of the three share
2198 * stateid's in the inode.
2199 *
2200 * NOTE: Caller must be holding the sp->so_owner semaphore!
2201 */
643168c2 2202int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2203{
4a35bd41 2204 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2205 struct nfs4_closedata *calldata;
b39e625b
TM		 2206 struct nfs4_state_owner *sp = state->owner;
2207 struct rpc_task *task;
5138fde0
TM		 2208 struct rpc_message msg = {
2209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2210 .rpc_cred = state->owner->so_cred,
2211 };
c970aa85
TM		 2212 struct rpc_task_setup task_setup_data = {
2213 .rpc_client = server->client,
5138fde0 2214 .rpc_message = &msg,
c970aa85 2215 .callback_ops = &nfs4_close_ops,
101070ca 2216 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2217 .flags = RPC_TASK_ASYNC,
2218 };
9512135d 2219 int status = -ENOMEM;
1da177e4 2220
8535b2be 2221 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2222 if (calldata == NULL)
9512135d 2223 goto out;
9d12b216 2224 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2225 calldata->inode = state->inode;
1da177e4 2226 calldata->state = state;
4a35bd41 2227 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2228 calldata->arg.stateid = &state->open_stateid;
1da177e4 2229 /* Serialization for the sequence id */
8535b2be 2230 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2231 if (calldata->arg.seqid == NULL)
2232 goto out_free_calldata;
dc0b027d 2233 calldata->arg.fmode = 0;
a65318bf 2234 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2235 calldata->res.fattr = &calldata->fattr;
c1d51931 2236 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2237 calldata->res.server = server;
f7e8917a 2238 calldata->roc = roc;
643168c2 2239 nfs_sb_active(calldata->inode->i_sb);
9512135d 2240
1174dd1f
TM		 2241 msg.rpc_argp = &calldata->arg;
2242 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2243 task_setup_data.callback_data = calldata;
2244 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2245 if (IS_ERR(task))
2246 return PTR_ERR(task);
a49c3c77
TM		 2247 status = 0;
2248 if (wait)
2249 status = rpc_wait_for_completion_task(task);
b39e625b 2250 rpc_put_task(task);
a49c3c77 2251 return status;
9512135d
TM		 2252out_free_calldata:
2253 kfree(calldata);
2254out:
f7e8917a
FI		 2255 if (roc)
2256 pnfs_roc_release(state->inode);
b39e625b
TM		 2257 nfs4_put_open_state(state);
2258 nfs4_put_state_owner(sp);
9512135d 2259 return status;
1da177e4
LT		 2260}
2261
2b484297 2262static struct inode *
cd9a1c0e 2263nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2264{
1da177e4 2265 struct nfs4_state *state;
1da177e4 2266
565277f6 2267 /* Protect against concurrent sillydeletes */
82be417a
AA		 2268 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2269 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2270 if (IS_ERR(state))
2271 return ERR_CAST(state);
cd9a1c0e 2272 ctx->state = state;
f46e0bd3 2273 return igrab(state->inode);
1da177e4
LT		 2274}
2275
1185a552 2276static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2277{
2278 if (ctx->state == NULL)
2279 return;
2280 if (is_sync)
643168c2 2281 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2282 else
643168c2 2283 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2284}
1da177e4
LT		 2285
2286static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2287{
43652ad5
BH		 2288 struct nfs4_server_caps_arg args = {
2289 .fhandle = fhandle,
2290 };
1da177e4
LT		 2291 struct nfs4_server_caps_res res = {};
2292 struct rpc_message msg = {
2293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2294 .rpc_argp = &args,
1da177e4
LT		 2295 .rpc_resp = &res,
2296 };
2297 int status;
2298
7c513058 2299 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2300 if (status == 0) {
2301 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2302 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2303 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2304 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2305 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2306 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2307 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2308 server->caps |= NFS_CAP_ACLS;
2309 if (res.has_links != 0)
2310 server->caps |= NFS_CAP_HARDLINKS;
2311 if (res.has_symlinks != 0)
2312 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2313 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2314 server->caps |= NFS_CAP_FILEID;
2315 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2316 server->caps |= NFS_CAP_MODE;
2317 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2318 server->caps |= NFS_CAP_NLINK;
2319 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2320 server->caps |= NFS_CAP_OWNER;
2321 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2322 server->caps |= NFS_CAP_OWNER_GROUP;
2323 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2324 server->caps |= NFS_CAP_ATIME;
2325 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2326 server->caps |= NFS_CAP_CTIME;
2327 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2328 server->caps |= NFS_CAP_MTIME;
2329
a65318bf
TM		 2330 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2331 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2332 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2333 server->acl_bitmask = res.acl_bitmask;
264e6351 2334 server->fh_expire_type = res.fh_expire_type;
1da177e4 2335 }
cccef3b9 2336
1da177e4
LT		 2337 return status;
2338}
2339
55a97593 2340int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2341{
2342 struct nfs4_exception exception = { };
2343 int err;
2344 do {
2345 err = nfs4_handle_exception(server,
2346 _nfs4_server_capabilities(server, fhandle),
2347 &exception);
2348 } while (exception.retry);
2349 return err;
2350}
2351
2352static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2353 struct nfs_fsinfo *info)
2354{
1da177e4
LT		 2355 struct nfs4_lookup_root_arg args = {
2356 .bitmask = nfs4_fattr_bitmap,
2357 };
2358 struct nfs4_lookup_res res = {
2359 .server = server,
0e574af1 2360 .fattr = info->fattr,
1da177e4
LT		 2361 .fh = fhandle,
2362 };
2363 struct rpc_message msg = {
2364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2365 .rpc_argp = &args,
2366 .rpc_resp = &res,
2367 };
008f55d0 2368
0e574af1 2369 nfs_fattr_init(info->fattr);
7c513058 2370 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2371}
2372
2373static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2374 struct nfs_fsinfo *info)
2375{
2376 struct nfs4_exception exception = { };
2377 int err;
2378 do {
fb8a5ba8
BS		 2379 err = _nfs4_lookup_root(server, fhandle, info);
2380 switch (err) {
2381 case 0:
2382 case -NFS4ERR_WRONGSEC:
05e9cfb4 2383 goto out;
fb8a5ba8
BS		 2384 default:
2385 err = nfs4_handle_exception(server, err, &exception);
2386 }
1da177e4 2387 } while (exception.retry);
05e9cfb4 2388out:
1da177e4
LT		 2389 return err;
2390}
2391
8f70e95f
BS		 2392static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2393 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2394{
2395 struct rpc_auth *auth;
2396 int ret;
2397
2398 auth = rpcauth_create(flavor, server->client);
2399 if (!auth) {
2400 ret = -EIO;
2401 goto out;
2402 }
2403 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2404out:
2405 return ret;
2406}
2407
801a16dc 2408static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2409 struct nfs_fsinfo *info)
1da177e4 2410{
8f70e95f 2411 int i, len, status = 0;
0fabee24 2412 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2413
6a1a1e34
CL		 2414 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2415 BUG_ON(len < 0);
8f70e95f
BS		 2416
2417 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2418 /* AUTH_UNIX is the default flavor if none was specified,
2419 * thus has already been tried. */
2420 if (flav_array[i] == RPC_AUTH_UNIX)
2421 continue;
2422
8f70e95f 2423 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2424 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2425 continue;
2426 break;
8f70e95f 2427 }
fb8a5ba8
BS		 2428 /*
2429 * -EACCESS could mean that the user doesn't have correct permissions
2430 * to access the mount. It could also mean that we tried to mount
2431 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2432 * existing mount programs don't handle -EACCES very well so it should
2433 * be mapped to -EPERM instead.
2434 */
2435 if (status == -EACCES)
2436 status = -EPERM;
801a16dc
BS		 2437 return status;
2438}
2439
2440/*
2441 * get the file handle for the "/" directory on the server
2442 */
3028eb2b
BS		 2443int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2444 struct nfs_fsinfo *info)
801a16dc 2445{
fca78d6d 2446 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2447 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2448 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2449 /*
2450 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2451 * by nfs4_map_errors() as this function exits.
2452 */
fca78d6d 2453 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2454 if (status == 0)
2455 status = nfs4_server_capabilities(server, fhandle);
2456 if (status == 0)
2457 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2458 return nfs4_map_errors(status);
1da177e4
LT		 2459}
2460
bae36241
BS		 2461static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2462 struct nfs_fsinfo *info)
2463{
2464 int error;
2465 struct nfs_fattr *fattr = info->fattr;
2466
2467 error = nfs4_server_capabilities(server, mntfh);
2468 if (error < 0) {
2469 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2470 return error;
2471 }
2472
2473 error = nfs4_proc_getattr(server, mntfh, fattr);
2474 if (error < 0) {
2475 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2476 return error;
2477 }
2478
2479 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2480 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2481 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2482
2483 return error;
2484}
2485
6b97fd3d
MN		 2486/*
2487 * Get locations and (maybe) other attributes of a referral.
2488 * Note that we'll actually follow the referral later when
2489 * we detect fsid mismatch in inode revalidation
2490 */
f05d147f
BS		 2491static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2492 const struct qstr *name, struct nfs_fattr *fattr,
2493 struct nfs_fh *fhandle)
6b97fd3d
MN		 2494{
2495 int status = -ENOMEM;
2496 struct page *page = NULL;
2497 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2498
2499 page = alloc_page(GFP_KERNEL);
2500 if (page == NULL)
2501 goto out;
2502 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2503 if (locations == NULL)
2504 goto out;
2505
f05d147f 2506 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2507 if (status != 0)
2508 goto out;
2509 /* Make sure server returned a different fsid for the referral */
2510 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2511 dprintk("%s: server did not return a different fsid for"
2512 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2513 status = -EIO;
2514 goto out;
2515 }
533eb461
AA		 2516 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2517 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2518
533eb461 2519 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2520 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2521 memset(fhandle, 0, sizeof(struct nfs_fh));
2522out:
2523 if (page)
2524 __free_page(page);
5d7ca35a 2525 kfree(locations);
6b97fd3d
MN		 2526 return status;
2527}
2528
1da177e4
LT		 2529static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2530{
2531 struct nfs4_getattr_arg args = {
2532 .fh = fhandle,
2533 .bitmask = server->attr_bitmask,
2534 };
2535 struct nfs4_getattr_res res = {
2536 .fattr = fattr,
2537 .server = server,
2538 };
2539 struct rpc_message msg = {
2540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2541 .rpc_argp = &args,
2542 .rpc_resp = &res,
2543 };
2544
0e574af1 2545 nfs_fattr_init(fattr);
7c513058 2546 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2547}
2548
2549static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2550{
2551 struct nfs4_exception exception = { };
2552 int err;
2553 do {
2554 err = nfs4_handle_exception(server,
2555 _nfs4_proc_getattr(server, fhandle, fattr),
2556 &exception);
2557 } while (exception.retry);
2558 return err;
2559}
2560
2561/*
2562 * The file is not closed if it is opened due to the a request to change
2563 * the size of the file. The open call will not be needed once the
2564 * VFS layer lookup-intents are implemented.
2565 *
2566 * Close is called when the inode is destroyed.
2567 * If we haven't opened the file for O_WRONLY, we
2568 * need to in the size_change case to obtain a stateid.
2569 *
2570 * Got race?
2571 * Because OPEN is always done by name in nfsv4, it is
2572 * possible that we opened a different file by the same
2573 * name. We can recognize this race condition, but we
2574 * can't do anything about it besides returning an error.
2575 *
2576 * This will be fixed with VFS changes (lookup-intent).
2577 */
2578static int
2579nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2580 struct iattr *sattr)
2581{
08e9eac4 2582 struct inode *inode = dentry->d_inode;
659bfcd6 2583 struct rpc_cred *cred = NULL;
d530838b 2584 struct nfs4_state *state = NULL;
1da177e4
LT		 2585 int status;
2586
8a1636c4
BH		 2587 if (pnfs_ld_layoutret_on_setattr(inode))
2588 pnfs_return_layout(inode);
2589
0e574af1 2590 nfs_fattr_init(fattr);
1da177e4 2591
2669940d
AA		 2592 /* Deal with open(O_TRUNC) */
2593 if (sattr->ia_valid & ATTR_OPEN)
2594 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2595
2596 /* Optimization: if the end result is no change, don't RPC */
2597 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2598 return 0;
2599
d530838b 2600 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2601 if (sattr->ia_valid & ATTR_FILE) {
2602 struct nfs_open_context *ctx;
2603
2604 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2605 if (ctx) {
2606 cred = ctx->cred;
2607 state = ctx->state;
2608 }
659bfcd6 2609 }
08e9eac4 2610
659bfcd6 2611 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2612 if (status == 0)
2613 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2614 return status;
2615}
2616
0c2e53f1
TM		 2617static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2618 const struct qstr *name, struct nfs_fh *fhandle,
2619 struct nfs_fattr *fattr)
2b3de441 2620{
0c2e53f1 2621 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2622 int status;
2623 struct nfs4_lookup_arg args = {
2624 .bitmask = server->attr_bitmask,
0c2e53f1 2625 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2626 .name = name,
2627 };
2628 struct nfs4_lookup_res res = {
2629 .server = server,
2630 .fattr = fattr,
2631 .fh = fhandle,
2632 };
2633 struct rpc_message msg = {
2634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2635 .rpc_argp = &args,
2636 .rpc_resp = &res,
2637 };
2638
2639 nfs_fattr_init(fattr);
2640
1da177e4 2641 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2642 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2643 dprintk("NFS reply lookup: %d\n", status);
2644 return status;
2645}
2646
72de53ec 2647static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2648{
7ebb9315 2649 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2650 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2651 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2652 fattr->nlink = 2;
2653}
2654
72de53ec
BS		 2655static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2656 struct qstr *name, struct nfs_fh *fhandle,
2657 struct nfs_fattr *fattr)
1da177e4
LT		 2658{
2659 struct nfs4_exception exception = { };
72de53ec 2660 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2661 int err;
2662 do {
72de53ec
BS		 2663 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2664 switch (err) {
08ef7bd3 2665 case -NFS4ERR_BADNAME:
72de53ec
BS		 2666 err = -ENOENT;
2667 goto out;
0c2e53f1 2668 case -NFS4ERR_MOVED:
f05d147f 2669 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2670 goto out;
0c2e53f1 2671 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2672 err = -EPERM;
2673 if (client != *clnt)
2674 goto out;
2675
2676 client = nfs4_create_sec_client(client, dir, name);
2677 if (IS_ERR(client))
2678 return PTR_ERR(client);
2679
2680 exception.retry = 1;
2681 break;
2682 default:
2683 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2684 }
1da177e4 2685 } while (exception.retry);
72de53ec
BS		 2686
2687out:
2688 if (err == 0)
2689 *clnt = client;
2690 else if (client != *clnt)
2691 rpc_shutdown_client(client);
2692
1da177e4
LT		 2693 return err;
2694}
2695
80a16b21 2696static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2697 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2698{
2699 int status;
2700 struct rpc_clnt *client = NFS_CLIENT(dir);
2701
2702 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2703 if (client != NFS_CLIENT(dir)) {
2704 rpc_shutdown_client(client);
2705 nfs_fixup_secinfo_attributes(fattr);
2706 }
2707 return status;
2708}
2709
f05d147f
BS		 2710struct rpc_clnt *
2711nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2712 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2713{
2714 int status;
2715 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2716
2717 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2718 if (status < 0) {
2719 rpc_shutdown_client(client);
2720 return ERR_PTR(status);
2721 }
2722 return client;
2723}
2724
1da177e4
LT		 2725static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2726{
76b32999 2727 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2728 struct nfs4_accessargs args = {
2729 .fh = NFS_FH(inode),
a4980e78 2730 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2731 };
2732 struct nfs4_accessres res = {
2733 .server = server,
1da177e4 2734 };
1da177e4
LT		 2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2737 .rpc_argp = &args,
2738 .rpc_resp = &res,
2739 .rpc_cred = entry->cred,
2740 };
2741 int mode = entry->mask;
2742 int status;
2743
2744 /*
2745 * Determine which access bits we want to ask for...
2746 */
2747 if (mode & MAY_READ)
2748 args.access |= NFS4_ACCESS_READ;
2749 if (S_ISDIR(inode->i_mode)) {
2750 if (mode & MAY_WRITE)
2751 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2752 if (mode & MAY_EXEC)
2753 args.access |= NFS4_ACCESS_LOOKUP;
2754 } else {
2755 if (mode & MAY_WRITE)
2756 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2757 if (mode & MAY_EXEC)
2758 args.access |= NFS4_ACCESS_EXECUTE;
2759 }
c407d41a
TM		 2760
2761 res.fattr = nfs_alloc_fattr();
2762 if (res.fattr == NULL)
2763 return -ENOMEM;
2764
7c513058 2765 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2766 if (!status) {
2767 entry->mask = 0;
2768 if (res.access & NFS4_ACCESS_READ)
2769 entry->mask |= MAY_READ;
2770 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2771 entry->mask |= MAY_WRITE;
2772 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2773 entry->mask |= MAY_EXEC;
c407d41a 2774 nfs_refresh_inode(inode, res.fattr);
1da177e4 2775 }
c407d41a 2776 nfs_free_fattr(res.fattr);
1da177e4
LT		 2777 return status;
2778}
2779
2780static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2781{
2782 struct nfs4_exception exception = { };
2783 int err;
2784 do {
2785 err = nfs4_handle_exception(NFS_SERVER(inode),
2786 _nfs4_proc_access(inode, entry),
2787 &exception);
2788 } while (exception.retry);
2789 return err;
2790}
2791
2792/*
2793 * TODO: For the time being, we don't try to get any attributes
2794 * along with any of the zero-copy operations READ, READDIR,
2795 * READLINK, WRITE.
2796 *
2797 * In the case of the first three, we want to put the GETATTR
2798 * after the read-type operation -- this is because it is hard
2799 * to predict the length of a GETATTR response in v4, and thus
2800 * align the READ data correctly. This means that the GETATTR
2801 * may end up partially falling into the page cache, and we should
2802 * shift it into the 'tail' of the xdr_buf before processing.
2803 * To do this efficiently, we need to know the total length
2804 * of data received, which doesn't seem to be available outside
2805 * of the RPC layer.
2806 *
2807 * In the case of WRITE, we also want to put the GETATTR after
2808 * the operation -- in this case because we want to make sure
140150db 2809 * we get the post-operation mtime and size.
1da177e4
LT		 2810 *
2811 * Both of these changes to the XDR layer would in fact be quite
2812 * minor, but I decided to leave them for a subsequent patch.
2813 */
2814static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2815 unsigned int pgbase, unsigned int pglen)
2816{
2817 struct nfs4_readlink args = {
2818 .fh = NFS_FH(inode),
2819 .pgbase = pgbase,
2820 .pglen = pglen,
2821 .pages = &page,
2822 };
f50c7000 2823 struct nfs4_readlink_res res;
1da177e4
LT		 2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2826 .rpc_argp = &args,
f50c7000 2827 .rpc_resp = &res,
1da177e4
LT		 2828 };
2829
7c513058 2830 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2831}
2832
2833static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2834 unsigned int pgbase, unsigned int pglen)
2835{
2836 struct nfs4_exception exception = { };
2837 int err;
2838 do {
2839 err = nfs4_handle_exception(NFS_SERVER(inode),
2840 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2841 &exception);
2842 } while (exception.retry);
2843 return err;
2844}
2845
1da177e4 2846/*
8867fe58 2847 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2848 */
1da177e4
LT		 2849static int
2850nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2851 int flags)
1da177e4 2852{
8867fe58 2853 struct nfs_open_context *ctx;
1da177e4 2854 struct nfs4_state *state;
1da177e4
LT		 2855 int status = 0;
2856
8867fe58
MS		 2857 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2858 if (IS_ERR(ctx))
2859 return PTR_ERR(ctx);
2860
a8a5da99 2861 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2862 state = nfs4_do_open(dir, dentry, ctx->mode,
2863 flags, sattr, ctx->cred,
2864 &ctx->mdsthreshold);
d4d9cdcb 2865 d_drop(dentry);
1da177e4
LT		 2866 if (IS_ERR(state)) {
2867 status = PTR_ERR(state);
c0204fd2 2868 goto out;
1da177e4 2869 }
d4d9cdcb 2870 d_add(dentry, igrab(state->inode));
d75340cc 2871 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2872 ctx->state = state;
1da177e4 2873out:
8867fe58 2874 put_nfs_open_context(ctx);
1da177e4
LT		 2875 return status;
2876}
2877
2878static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2879{
16e42959 2880 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2881 struct nfs_removeargs args = {
1da177e4 2882 .fh = NFS_FH(dir),
26fe5750 2883 .name = *name,
16e42959 2884 };
4fdc17b2 2885 struct nfs_removeres res = {
16e42959 2886 .server = server,
1da177e4 2887 };
1da177e4 2888 struct rpc_message msg = {
4fdc17b2
TM		 2889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2890 .rpc_argp = &args,
2891 .rpc_resp = &res,
1da177e4 2892 };
778d2817 2893 int status;
1da177e4 2894
7c513058 2895 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2896 if (status == 0)
16e42959 2897 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2898 return status;
2899}
2900
2901static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2902{
2903 struct nfs4_exception exception = { };
2904 int err;
2905 do {
2906 err = nfs4_handle_exception(NFS_SERVER(dir),
2907 _nfs4_proc_remove(dir, name),
2908 &exception);
2909 } while (exception.retry);
2910 return err;
2911}
2912
e4eff1a6 2913static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2914{
e4eff1a6
TM		 2915 struct nfs_server *server = NFS_SERVER(dir);
2916 struct nfs_removeargs *args = msg->rpc_argp;
2917 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2918
e4eff1a6 2919 res->server = server;
1da177e4 2920 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2921 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2922}
2923
34e137cc
BS		 2924static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2925{
2926 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2927 &data->args.seq_args,
2928 &data->res.seq_res,
2929 task))
2930 return;
2931 rpc_call_start(task);
1da177e4
LT		 2932}
2933
e4eff1a6 2934static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2935{
e4eff1a6
TM		 2936 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2937
14516c3a
TM		 2938 if (!nfs4_sequence_done(task, &res->seq_res))
2939 return 0;
9e33bed5 2940 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2941 return 0;
2942 update_changeattr(dir, &res->cinfo);
e4eff1a6 2943 return 1;
1da177e4
LT		 2944}
2945
d3d4152a
JL		 2946static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2947{
2948 struct nfs_server *server = NFS_SERVER(dir);
2949 struct nfs_renameargs *arg = msg->rpc_argp;
2950 struct nfs_renameres *res = msg->rpc_resp;
2951
2952 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2953 res->server = server;
9d12b216 2954 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2955}
2956
c6bfa1a1
BS		 2957static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2958{
2959 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2960 &data->args.seq_args,
2961 &data->res.seq_res,
2962 task))
2963 return;
2964 rpc_call_start(task);
d3d4152a
JL		 2965}
2966
2967static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2968 struct inode *new_dir)
2969{
2970 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2971
2972 if (!nfs4_sequence_done(task, &res->seq_res))
2973 return 0;
2974 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2975 return 0;
2976
2977 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2978 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2979 return 1;
2980}
2981
1da177e4
LT		 2982static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2983 struct inode *new_dir, struct qstr *new_name)
2984{
6caf2c82 2985 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2986 struct nfs_renameargs arg = {
1da177e4
LT		 2987 .old_dir = NFS_FH(old_dir),
2988 .new_dir = NFS_FH(new_dir),
2989 .old_name = old_name,
2990 .new_name = new_name,
6caf2c82 2991 };
e8582a8b 2992 struct nfs_renameres res = {
6caf2c82 2993 .server = server,
1da177e4 2994 };
1da177e4
LT		 2995 struct rpc_message msg = {
2996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2997 .rpc_argp = &arg,
2998 .rpc_resp = &res,
2999 };
011fff72 3000 int status = -ENOMEM;
1da177e4 3001
7c513058 3002 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3003 if (!status) {
3004 update_changeattr(old_dir, &res.old_cinfo);
3005 update_changeattr(new_dir, &res.new_cinfo);
3006 }
3007 return status;
3008}
3009
3010static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3011 struct inode *new_dir, struct qstr *new_name)
3012{
3013 struct nfs4_exception exception = { };
3014 int err;
3015 do {
3016 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3017 _nfs4_proc_rename(old_dir, old_name,
3018 new_dir, new_name),
3019 &exception);
3020 } while (exception.retry);
3021 return err;
3022}
3023
3024static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3025{
91ba2eee 3026 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3027 struct nfs4_link_arg arg = {
3028 .fh = NFS_FH(inode),
3029 .dir_fh = NFS_FH(dir),
3030 .name = name,
91ba2eee
TM		 3031 .bitmask = server->attr_bitmask,
3032 };
91ba2eee
TM		 3033 struct nfs4_link_res res = {
3034 .server = server,
1da177e4 3035 };
1da177e4
LT		 3036 struct rpc_message msg = {
3037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3038 .rpc_argp = &arg,
91ba2eee 3039 .rpc_resp = &res,
1da177e4 3040 };
136f2627
TM		 3041 int status = -ENOMEM;
3042
3043 res.fattr = nfs_alloc_fattr();
778d2817 3044 if (res.fattr == NULL)
136f2627 3045 goto out;
1da177e4 3046
7c513058 3047 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3048 if (!status) {
3049 update_changeattr(dir, &res.cinfo);
73a3d07c 3050 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3051 }
136f2627 3052out:
136f2627 3053 nfs_free_fattr(res.fattr);
1da177e4
LT		 3054 return status;
3055}
3056
3057static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3058{
3059 struct nfs4_exception exception = { };
3060 int err;
3061 do {
3062 err = nfs4_handle_exception(NFS_SERVER(inode),
3063 _nfs4_proc_link(inode, dir, name),
3064 &exception);
3065 } while (exception.retry);
3066 return err;
3067}
3068
57dc9a57
TM		 3069struct nfs4_createdata {
3070 struct rpc_message msg;
3071 struct nfs4_create_arg arg;
3072 struct nfs4_create_res res;
3073 struct nfs_fh fh;
3074 struct nfs_fattr fattr;
57dc9a57
TM		 3075};
3076
3077static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3078 struct qstr *name, struct iattr *sattr, u32 ftype)
3079{
3080 struct nfs4_createdata *data;
3081
3082 data = kzalloc(sizeof(*data), GFP_KERNEL);
3083 if (data != NULL) {
3084 struct nfs_server *server = NFS_SERVER(dir);
3085
3086 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3087 data->msg.rpc_argp = &data->arg;
3088 data->msg.rpc_resp = &data->res;
3089 data->arg.dir_fh = NFS_FH(dir);
3090 data->arg.server = server;
3091 data->arg.name = name;
3092 data->arg.attrs = sattr;
3093 data->arg.ftype = ftype;
3094 data->arg.bitmask = server->attr_bitmask;
3095 data->res.server = server;
3096 data->res.fh = &data->fh;
3097 data->res.fattr = &data->fattr;
57dc9a57 3098 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3099 }
3100 return data;
3101}
3102
3103static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3104{
7c513058 3105 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3106 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3107 if (status == 0) {
3108 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3109 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3110 }
3111 return status;
3112}
3113
3114static void nfs4_free_createdata(struct nfs4_createdata *data)
3115{
3116 kfree(data);
3117}
3118
4f390c15 3119static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3120 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3121{
57dc9a57
TM		 3122 struct nfs4_createdata *data;
3123 int status = -ENAMETOOLONG;
1da177e4 3124
94a6d753 3125 if (len > NFS4_MAXPATHLEN)
57dc9a57 3126 goto out;
4f390c15 3127
57dc9a57
TM		 3128 status = -ENOMEM;
3129 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3130 if (data == NULL)
3131 goto out;
3132
3133 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3134 data->arg.u.symlink.pages = &page;
3135 data->arg.u.symlink.len = len;
1da177e4 3136
57dc9a57
TM		 3137 status = nfs4_do_create(dir, dentry, data);
3138
3139 nfs4_free_createdata(data);
3140out:
1da177e4
LT		 3141 return status;
3142}
3143
4f390c15 3144static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3145 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3146{
3147 struct nfs4_exception exception = { };
3148 int err;
3149 do {
3150 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3151 _nfs4_proc_symlink(dir, dentry, page,
3152 len, sattr),
1da177e4
LT		 3153 &exception);
3154 } while (exception.retry);
3155 return err;
3156}
3157
3158static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3159 struct iattr *sattr)
3160{
57dc9a57
TM		 3161 struct nfs4_createdata *data;
3162 int status = -ENOMEM;
1da177e4 3163
57dc9a57
TM		 3164 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3165 if (data == NULL)
3166 goto out;
3167
3168 status = nfs4_do_create(dir, dentry, data);
3169
3170 nfs4_free_createdata(data);
3171out:
1da177e4
LT		 3172 return status;
3173}
3174
3175static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3176 struct iattr *sattr)
3177{
3178 struct nfs4_exception exception = { };
3179 int err;
a8a5da99
AK		 3180
3181 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3182 do {
3183 err = nfs4_handle_exception(NFS_SERVER(dir),
3184 _nfs4_proc_mkdir(dir, dentry, sattr),
3185 &exception);
3186 } while (exception.retry);
3187 return err;
3188}
3189
3190static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3191 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3192{
3193 struct inode *dir = dentry->d_inode;
3194 struct nfs4_readdir_arg args = {
3195 .fh = NFS_FH(dir),
56e4ebf8 3196 .pages = pages,
1da177e4
LT		 3197 .pgbase = 0,
3198 .count = count,
96d25e53 3199 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3200 .plus = plus,
1da177e4
LT		 3201 };
3202 struct nfs4_readdir_res res;
3203 struct rpc_message msg = {
3204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3205 .rpc_argp = &args,
3206 .rpc_resp = &res,
3207 .rpc_cred = cred,
3208 };
3209 int status;
3210
3110ff80 3211 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3212 dentry->d_parent->d_name.name,
3213 dentry->d_name.name,
3214 (unsigned long long)cookie);
1da177e4
LT		 3215 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3216 res.pgbase = args.pgbase;
7c513058 3217 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3218 if (status >= 0) {
1da177e4 3219 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3220 status += args.pgbase;
3221 }
c4812998
TM		 3222
3223 nfs_invalidate_atime(dir);
3224
3110ff80 3225 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3226 return status;
3227}
3228
3229static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3230 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3231{
3232 struct nfs4_exception exception = { };
3233 int err;
3234 do {
3235 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3236 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3237 pages, count, plus),
1da177e4
LT		 3238 &exception);
3239 } while (exception.retry);
3240 return err;
3241}
3242
3243static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3244 struct iattr *sattr, dev_t rdev)
3245{
57dc9a57
TM		 3246 struct nfs4_createdata *data;
3247 int mode = sattr->ia_mode;
3248 int status = -ENOMEM;
1da177e4
LT		 3249
3250 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3251 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3252
3253 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3254 if (data == NULL)
3255 goto out;
3256
1da177e4 3257 if (S_ISFIFO(mode))
57dc9a57 3258 data->arg.ftype = NF4FIFO;
1da177e4 3259 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3260 data->arg.ftype = NF4BLK;
3261 data->arg.u.device.specdata1 = MAJOR(rdev);
3262 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3263 }
3264 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3265 data->arg.ftype = NF4CHR;
3266 data->arg.u.device.specdata1 = MAJOR(rdev);
3267 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3268 }
1da177e4 3269
57dc9a57
TM		 3270 status = nfs4_do_create(dir, dentry, data);
3271
3272 nfs4_free_createdata(data);
3273out:
1da177e4
LT		 3274 return status;
3275}
3276
3277static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3278 struct iattr *sattr, dev_t rdev)
3279{
3280 struct nfs4_exception exception = { };
3281 int err;
a8a5da99
AK		 3282
3283 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3284 do {
3285 err = nfs4_handle_exception(NFS_SERVER(dir),
3286 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3287 &exception);
3288 } while (exception.retry);
3289 return err;
3290}
3291
3292static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3293 struct nfs_fsstat *fsstat)
3294{
3295 struct nfs4_statfs_arg args = {
3296 .fh = fhandle,
3297 .bitmask = server->attr_bitmask,
3298 };
24ad148a
BH		 3299 struct nfs4_statfs_res res = {
3300 .fsstat = fsstat,
3301 };
1da177e4
LT		 3302 struct rpc_message msg = {
3303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3304 .rpc_argp = &args,
24ad148a 3305 .rpc_resp = &res,
1da177e4
LT		 3306 };
3307
0e574af1 3308 nfs_fattr_init(fsstat->fattr);
7c513058 3309 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3310}
3311
3312static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3313{
3314 struct nfs4_exception exception = { };
3315 int err;
3316 do {
3317 err = nfs4_handle_exception(server,
3318 _nfs4_proc_statfs(server, fhandle, fsstat),
3319 &exception);
3320 } while (exception.retry);
3321 return err;
3322}
3323
3324static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3325 struct nfs_fsinfo *fsinfo)
3326{
3327 struct nfs4_fsinfo_arg args = {
3328 .fh = fhandle,
3329 .bitmask = server->attr_bitmask,
3330 };
3dda5e43
BH		 3331 struct nfs4_fsinfo_res res = {
3332 .fsinfo = fsinfo,
3333 };
1da177e4
LT		 3334 struct rpc_message msg = {
3335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3336 .rpc_argp = &args,
3dda5e43 3337 .rpc_resp = &res,
1da177e4
LT		 3338 };
3339
7c513058 3340 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3341}
3342
3343static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3344{
3345 struct nfs4_exception exception = { };
3346 int err;
3347
3348 do {
3349 err = nfs4_handle_exception(server,
3350 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3351 &exception);
3352 } while (exception.retry);
3353 return err;
3354}
3355
3356static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3357{
e38eb650
BS		 3358 int error;
3359
0e574af1 3360 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3361 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3362 if (error == 0)
3363 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3364
3365 return error;
1da177e4
LT		 3366}
3367
3368static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3369 struct nfs_pathconf *pathconf)
3370{
3371 struct nfs4_pathconf_arg args = {
3372 .fh = fhandle,
3373 .bitmask = server->attr_bitmask,
3374 };
d45b2989
BH		 3375 struct nfs4_pathconf_res res = {
3376 .pathconf = pathconf,
3377 };
1da177e4
LT		 3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3380 .rpc_argp = &args,
d45b2989 3381 .rpc_resp = &res,
1da177e4
LT		 3382 };
3383
3384 /* None of the pathconf attributes are mandatory to implement */
3385 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3386 memset(pathconf, 0, sizeof(*pathconf));
3387 return 0;
3388 }
3389
0e574af1 3390 nfs_fattr_init(pathconf->fattr);
7c513058 3391 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3392}
3393
3394static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3395 struct nfs_pathconf *pathconf)
3396{
3397 struct nfs4_exception exception = { };
3398 int err;
3399
3400 do {
3401 err = nfs4_handle_exception(server,
3402 _nfs4_proc_pathconf(server, fhandle, pathconf),
3403 &exception);
3404 } while (exception.retry);
3405 return err;
3406}
3407
d20581aa
BH		 3408void __nfs4_read_done_cb(struct nfs_read_data *data)
3409{
cd841605 3410 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3411}
3412
cbdabc7f 3413static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3414{
cd841605 3415 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3416
9e33bed5 3417 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3418 rpc_restart_call_prepare(task);
ec06c096 3419 return -EAGAIN;
1da177e4 3420 }
8850df99 3421
d20581aa 3422 __nfs4_read_done_cb(data);
1da177e4 3423 if (task->tk_status > 0)
ec06c096
TM		 3424 renew_lease(server, data->timestamp);
3425 return 0;
1da177e4
LT		 3426}
3427
cbdabc7f
AA		 3428static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3429{
3430
3431 dprintk("--> %s\n", __func__);
3432
3433 if (!nfs4_sequence_done(task, &data->res.seq_res))
3434 return -EAGAIN;
3435
d20581aa
BH		 3436 return data->read_done_cb ? data->read_done_cb(task, data) :
3437 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3438}
3439
bdc7f021 3440static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3441{
1da177e4 3442 data->timestamp = jiffies;
cbdabc7f 3443 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3444 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3445 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3446}
3447
ea7c3303
BS		 3448static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3449{
cd841605 3450 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3451 &data->args.seq_args,
3452 &data->res.seq_res,
3453 task))
3454 return;
3455 rpc_call_start(task);
1da177e4
LT		 3456}
3457
b029bc9b 3458static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3459{
cd841605 3460 struct inode *inode = data->header->inode;
1da177e4 3461
9e33bed5 3462 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3463 rpc_restart_call_prepare(task);
788e7a89 3464 return -EAGAIN;
1da177e4 3465 }
4f9838c7 3466 if (task->tk_status >= 0) {
1da177e4 3467 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3468 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3469 }
788e7a89 3470 return 0;
1da177e4
LT		 3471}
3472
b029bc9b
FI		 3473static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3474{
3475 if (!nfs4_sequence_done(task, &data->res.seq_res))
3476 return -EAGAIN;
d20581aa
BH		 3477 return data->write_done_cb ? data->write_done_cb(task, data) :
3478 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3479}
3480
5a37f851
TM		 3481static
3482bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3483{
5a37f851
TM		 3484 const struct nfs_pgio_header *hdr = data->header;
3485
3486 /* Don't request attributes for pNFS or O_DIRECT writes */
3487 if (data->ds_clp != NULL || hdr->dreq != NULL)
3488 return false;
3489 /* Otherwise, request attributes if and only if we don't hold
3490 * a delegation
3491 */
011e2a7f 3492 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3493}
a69aef14 3494
bdc7f021 3495static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3496{
cd841605 3497 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3498
5a37f851 3499 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3500 data->args.bitmask = NULL;
3501 data->res.fattr = NULL;
3502 } else
3503 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3504
b029bc9b
FI		 3505 if (!data->write_done_cb)
3506 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3507 data->res.server = server;
1da177e4
LT		 3508 data->timestamp = jiffies;
3509
bdc7f021 3510 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3511 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3512}
3513
c6cb80d0
BS		 3514static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3515{
cd841605 3516 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3517 &data->args.seq_args,
3518 &data->res.seq_res,
3519 task))
3520 return;
3521 rpc_call_start(task);
1da177e4
LT		 3522}
3523
0b7c0153 3524static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3525{
3526 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3527 &data->args.seq_args,
3528 &data->res.seq_res,
3529 task))
3530 return;
3531 rpc_call_start(task);
1da177e4
LT		 3532}
3533
0b7c0153 3534static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3535{
1da177e4 3536 struct inode *inode = data->inode;
14516c3a 3537
9e33bed5 3538 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3539 rpc_restart_call_prepare(task);
788e7a89 3540 return -EAGAIN;
1da177e4 3541 }
788e7a89 3542 return 0;
1da177e4
LT		 3543}
3544
0b7c0153 3545static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3546{
3547 if (!nfs4_sequence_done(task, &data->res.seq_res))
3548 return -EAGAIN;
0b7c0153 3549 return data->commit_done_cb(task, data);
5f452431
FI		 3550}
3551
0b7c0153 3552static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3553{
788e7a89 3554 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3555
0b7c0153
FI		 3556 if (data->commit_done_cb == NULL)
3557 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3558 data->res.server = server;
bdc7f021 3559 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3560 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3561}
3562
9bc4e3ca
CL		 3563struct nfs4_renewdata {
3564 struct nfs_client *client;
3565 unsigned long timestamp;
3566};
3567
1da177e4
LT		 3568/*
3569 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3570 * standalone procedure for queueing an asynchronous RENEW.
3571 */
9bc4e3ca 3572static void nfs4_renew_release(void *calldata)
dc96aef9 3573{
9bc4e3ca
CL		 3574 struct nfs4_renewdata *data = calldata;
3575 struct nfs_client *clp = data->client;
dc96aef9 3576
0851de06
AB		 3577 if (atomic_read(&clp->cl_count) > 1)
3578 nfs4_schedule_state_renewal(clp);
3579 nfs_put_client(clp);
9bc4e3ca 3580 kfree(data);
dc96aef9
AB		 3581}
3582
9bc4e3ca 3583static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3584{
9bc4e3ca
CL		 3585 struct nfs4_renewdata *data = calldata;
3586 struct nfs_client *clp = data->client;
3587 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3588
3589 if (task->tk_status < 0) {
95baa25c 3590 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3591 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3592 return;
3593 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3594 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3595 return;
3596 }
3597 nfs4_schedule_path_down_recovery(clp);
1da177e4 3598 }
452e9352 3599 do_renew_lease(clp, timestamp);
1da177e4
LT		 3600}
3601
963d8fe5
TM		 3602static const struct rpc_call_ops nfs4_renew_ops = {
3603 .rpc_call_done = nfs4_renew_done,
dc96aef9 3604 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3605};
3606
2f60ea6b 3607static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3608{
3609 struct rpc_message msg = {
3610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3611 .rpc_argp = clp,
b4454fe1 3612 .rpc_cred = cred,
1da177e4 3613 };
9bc4e3ca 3614 struct nfs4_renewdata *data;
1da177e4 3615
2f60ea6b
TM		 3616 if (renew_flags == 0)
3617 return 0;
0851de06
AB		 3618 if (!atomic_inc_not_zero(&clp->cl_count))
3619 return -EIO;
b569ad34 3620 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3621 if (data == NULL)
3622 return -ENOMEM;
3623 data->client = clp;
3624 data->timestamp = jiffies;
1da177e4 3625 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3626 &nfs4_renew_ops, data);
1da177e4
LT		 3627}
3628
8534d4ec 3629static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3630{
3631 struct rpc_message msg = {
3632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3633 .rpc_argp = clp,
b4454fe1 3634 .rpc_cred = cred,
1da177e4
LT		 3635 };
3636 unsigned long now = jiffies;
3637 int status;
3638
3639 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3640 if (status < 0)
3641 return status;
452e9352 3642 do_renew_lease(clp, now);
1da177e4
LT		 3643 return 0;
3644}
3645
aa1870af
BF		 3646static inline int nfs4_server_supports_acls(struct nfs_server *server)
3647{
3648 return (server->caps & NFS_CAP_ACLS)
3649 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3650 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3651}
3652
3653/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3654 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3655 * the stack.
3656 */
3657#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3658
e9e3d724
NH		 3659static int buf_to_pages_noslab(const void *buf, size_t buflen,
3660 struct page **pages, unsigned int *pgbase)
3661{
3662 struct page *newpage, **spages;
3663 int rc = 0;
3664 size_t len;
3665 spages = pages;
3666
3667 do {
43b7c3f0 3668 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3669 newpage = alloc_page(GFP_KERNEL);
3670
3671 if (newpage == NULL)
3672 goto unwind;
3673 memcpy(page_address(newpage), buf, len);
3674 buf += len;
3675 buflen -= len;
3676 *pages++ = newpage;
3677 rc++;
3678 } while (buflen != 0);
3679
3680 return rc;
3681
3682unwind:
3683 for(; rc > 0; rc--)
3684 __free_page(spages[rc-1]);
3685 return -ENOMEM;
3686}
3687
e50a1c2e
BF		 3688struct nfs4_cached_acl {
3689 int cached;
3690 size_t len;
3e9d4154 3691 char data[0];
e50a1c2e
BF		 3692};
3693
3694static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3695{
3696 struct nfs_inode *nfsi = NFS_I(inode);
3697
3698 spin_lock(&inode->i_lock);
3699 kfree(nfsi->nfs4_acl);
3700 nfsi->nfs4_acl = acl;
3701 spin_unlock(&inode->i_lock);
3702}
3703
3704static void nfs4_zap_acl_attr(struct inode *inode)
3705{
3706 nfs4_set_cached_acl(inode, NULL);
3707}
3708
3709static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3710{
3711 struct nfs_inode *nfsi = NFS_I(inode);
3712 struct nfs4_cached_acl *acl;
3713 int ret = -ENOENT;
3714
3715 spin_lock(&inode->i_lock);
3716 acl = nfsi->nfs4_acl;
3717 if (acl == NULL)
3718 goto out;
3719 if (buf == NULL) /* user is just asking for length */
3720 goto out_len;
3721 if (acl->cached == 0)
3722 goto out;
3723 ret = -ERANGE; /* see getxattr(2) man page */
3724 if (acl->len > buflen)
3725 goto out;
3726 memcpy(buf, acl->data, acl->len);
3727out_len:
3728 ret = acl->len;
3729out:
3730 spin_unlock(&inode->i_lock);
3731 return ret;
3732}
3733
5794d21e 3734static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3735{
3736 struct nfs4_cached_acl *acl;
3737
5794d21e 3738 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3739 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3740 if (acl == NULL)
3741 goto out;
3742 acl->cached = 1;
5794d21e 3743 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3744 } else {
3745 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3746 if (acl == NULL)
3747 goto out;
3748 acl->cached = 0;
3749 }
3750 acl->len = acl_len;
3751out:
3752 nfs4_set_cached_acl(inode, acl);
3753}
3754
bf118a34
AA		 3755/*
3756 * The getxattr API returns the required buffer length when called with a
3757 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3758 * the required buf. On a NULL buf, we send a page of data to the server
3759 * guessing that the ACL request can be serviced by a page. If so, we cache
3760 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3761 * the cache. If not so, we throw away the page, and cache the required
3762 * length. The next getxattr call will then produce another round trip to
3763 * the server, this time with the input buf of the required size.
3764 */
16b4289c 3765static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3766{
bf118a34 3767 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3768 struct nfs_getaclargs args = {
3769 .fh = NFS_FH(inode),
3770 .acl_pages = pages,
3771 .acl_len = buflen,
3772 };
663c79b3
BH		 3773 struct nfs_getaclres res = {
3774 .acl_len = buflen,
3775 };
aa1870af
BF		 3776 struct rpc_message msg = {
3777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3778 .rpc_argp = &args,
663c79b3 3779 .rpc_resp = &res,
aa1870af 3780 };
56d08fef
CL		 3781 int ret = -ENOMEM, npages, i;
3782 size_t acl_len = 0;
aa1870af 3783
bf118a34
AA		 3784 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3785 /* As long as we're doing a round trip to the server anyway,
3786 * let's be prepared for a page of acl data. */
3787 if (npages == 0)
3788 npages = 1;
3789
5a006899
SP		 3790 /* Add an extra page to handle the bitmap returned */
3791 npages++;
3792
bf118a34
AA		 3793 for (i = 0; i < npages; i++) {
3794 pages[i] = alloc_page(GFP_KERNEL);
3795 if (!pages[i])
3796 goto out_free;
e50a1c2e 3797 }
5a006899
SP		 3798
3799 /* for decoding across pages */
3800 res.acl_scratch = alloc_page(GFP_KERNEL);
3801 if (!res.acl_scratch)
3802 goto out_free;
3803
bf118a34
AA		 3804 args.acl_len = npages * PAGE_SIZE;
3805 args.acl_pgbase = 0;
5a006899 3806
bf118a34
AA		 3807 /* Let decode_getfacl know not to fail if the ACL data is larger than
3808 * the page we send as a guess */
3809 if (buf == NULL)
3810 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3811
de040bec 3812 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3813 __func__, buf, buflen, npages, args.acl_len);
3814 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3815 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3816 if (ret)
3817 goto out_free;
bf118a34
AA		 3818
3819 acl_len = res.acl_len - res.acl_data_offset;
3820 if (acl_len > args.acl_len)
5794d21e 3821 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3822 else
5794d21e 3823 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3824 acl_len);
e50a1c2e
BF		 3825 if (buf) {
3826 ret = -ERANGE;
bf118a34 3827 if (acl_len > buflen)
e50a1c2e 3828 goto out_free;
bf118a34 3829 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3830 acl_len);
e50a1c2e 3831 }
bf118a34 3832 ret = acl_len;
e50a1c2e 3833out_free:
bf118a34
AA		 3834 for (i = 0; i < npages; i++)
3835 if (pages[i])
3836 __free_page(pages[i]);
331818f1
TM		 3837 if (res.acl_scratch)
3838 __free_page(res.acl_scratch);
aa1870af
BF		 3839 return ret;
3840}
3841
16b4289c
TM		 3842static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3843{
3844 struct nfs4_exception exception = { };
3845 ssize_t ret;
3846 do {
3847 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3848 if (ret >= 0)
3849 break;
3850 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3851 } while (exception.retry);
3852 return ret;
3853}
3854
e50a1c2e
BF		 3855static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3856{
3857 struct nfs_server *server = NFS_SERVER(inode);
3858 int ret;
3859
3860 if (!nfs4_server_supports_acls(server))
3861 return -EOPNOTSUPP;
3862 ret = nfs_revalidate_inode(server, inode);
3863 if (ret < 0)
3864 return ret;
08a22b39
AK		 3865 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3866 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3867 ret = nfs4_read_cached_acl(inode, buf, buflen);
3868 if (ret != -ENOENT)
bf118a34
AA		 3869 /* -ENOENT is returned if there is no ACL or if there is an ACL
3870 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3871 return ret;
3872 return nfs4_get_acl_uncached(inode, buf, buflen);
3873}
3874
16b4289c 3875static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3876{
3877 struct nfs_server *server = NFS_SERVER(inode);
3878 struct page *pages[NFS4ACL_MAXPAGES];
3879 struct nfs_setaclargs arg = {
3880 .fh = NFS_FH(inode),
3881 .acl_pages = pages,
3882 .acl_len = buflen,
3883 };
73c403a9 3884 struct nfs_setaclres res;
4b580ee3
BF		 3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3887 .rpc_argp = &arg,
73c403a9 3888 .rpc_resp = &res,
4b580ee3 3889 };
e9e3d724 3890 int ret, i;
4b580ee3
BF		 3891
3892 if (!nfs4_server_supports_acls(server))
3893 return -EOPNOTSUPP;
e9e3d724
NH		 3894 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3895 if (i < 0)
3896 return i;
57ec14c5 3897 nfs4_inode_return_delegation(inode);
7c513058 3898 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3899
3900 /*
3901 * Free each page after tx, so the only ref left is
3902 * held by the network stack
3903 */
3904 for (; i > 0; i--)
3905 put_page(pages[i-1]);
3906
08a22b39
AK		 3907 /*
3908 * Acl update can result in inode attribute update.
3909 * so mark the attribute cache invalid.
3910 */
3911 spin_lock(&inode->i_lock);
3912 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3913 spin_unlock(&inode->i_lock);
f41f7418
TM		 3914 nfs_access_zap_cache(inode);
3915 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3916 return ret;
3917}
3918
16b4289c
TM		 3919static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3920{
3921 struct nfs4_exception exception = { };
3922 int err;
3923 do {
3924 err = nfs4_handle_exception(NFS_SERVER(inode),
3925 __nfs4_proc_set_acl(inode, buf, buflen),
3926 &exception);
3927 } while (exception.retry);
3928 return err;
3929}
3930
1da177e4 3931static int
aa5190d0 3932nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3933{
aa5190d0
TM		 3934 struct nfs_client *clp = server->nfs_client;
3935
3936 if (task->tk_status >= 0)
1da177e4
LT		 3937 return 0;
3938 switch(task->tk_status) {
a1d0b5ee 3939 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3940 case -NFS4ERR_ADMIN_REVOKED:
3941 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3942 if (state == NULL)
3943 break;
3944 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3945 case -NFS4ERR_OPENMODE:
3946 if (state == NULL)
3947 break;
0400a6b0
TM		 3948 nfs4_schedule_stateid_recovery(server, state);
3949 goto wait_on_recovery;
0ced63d1
TM		 3950 case -NFS4ERR_EXPIRED:
3951 if (state != NULL)
3952 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3953 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3954 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3955 nfs4_schedule_lease_recovery(clp);
3956 goto wait_on_recovery;
4745e315
AA		 3957#if defined(CONFIG_NFS_V4_1)
3958 case -NFS4ERR_BADSESSION:
3959 case -NFS4ERR_BADSLOT:
3960 case -NFS4ERR_BAD_HIGH_SLOT:
3961 case -NFS4ERR_DEADSESSION:
3962 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3963 case -NFS4ERR_SEQ_FALSE_RETRY:
3964 case -NFS4ERR_SEQ_MISORDERED:
3965 dprintk("%s ERROR %d, Reset session\n", __func__,
3966 task->tk_status);
9f594791 3967 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3968 task->tk_status = 0;
3969 return -EAGAIN;
3970#endif /* CONFIG_NFS_V4_1 */
1da177e4 3971 case -NFS4ERR_DELAY:
aa5190d0 3972 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3973 case -NFS4ERR_GRACE:
2c643488 3974 case -EKEYEXPIRED:
1da177e4
LT		 3975 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3976 task->tk_status = 0;
3977 return -EAGAIN;
a8a4ae3a 3978 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3979 case -NFS4ERR_OLD_STATEID:
3980 task->tk_status = 0;
3981 return -EAGAIN;
3982 }
3983 task->tk_status = nfs4_map_errors(task->tk_status);
3984 return 0;
0400a6b0 3985wait_on_recovery:
a2c0b9e2 3986 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3987 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3988 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3989 task->tk_status = 0;
3990 return -EAGAIN;
1da177e4
LT		 3991}
3992
f092075d
CL		 3993static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3994 nfs4_verifier *bootverf)
cd93710e
CL		 3995{
3996 __be32 verf[2];
3997
2c820d9a
CL		 3998 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3999 /* An impossible timestamp guarantees this value
4000 * will never match a generated boot time. */
4001 verf[0] = 0;
4002 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4003 } else {
f092075d
CL		 4004 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4005 verf[0] = (__be32)nn->boot_time.tv_sec;
4006 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4007 }
cd93710e
CL		 4008 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4009}
4010
bb8b27e5
TM		 4011int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4012 unsigned short port, struct rpc_cred *cred,
4013 struct nfs4_setclientid_res *res)
1da177e4
LT		 4014{
4015 nfs4_verifier sc_verifier;
4016 struct nfs4_setclientid setclientid = {
4017 .sc_verifier = &sc_verifier,
4018 .sc_prog = program,
f4eecd5d 4019 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4020 };
4021 struct rpc_message msg = {
4022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4023 .rpc_argp = &setclientid,
bb8b27e5 4024 .rpc_resp = res,
286d7d6a 4025 .rpc_cred = cred,
1da177e4 4026 };
1da177e4
LT		 4027 int loop = 0;
4028 int status;
4029
f092075d 4030 nfs4_init_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 4031
4032 for(;;) {
2446ab60 4033 rcu_read_lock();
1da177e4 4034 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 4035 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 4036 clp->cl_ipaddr,
4037 rpc_peeraddr2str(clp->cl_rpcclient,
4038 RPC_DISPLAY_ADDR),
69dd716c
TM		 4039 rpc_peeraddr2str(clp->cl_rpcclient,
4040 RPC_DISPLAY_PROTO),
78ea323b 4041 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 4042 clp->cl_id_uniquifier);
4043 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4044 sizeof(setclientid.sc_netid),
4045 rpc_peeraddr2str(clp->cl_rpcclient,
4046 RPC_DISPLAY_NETID));
1da177e4 4047 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4048 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 4049 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 4050 rcu_read_unlock();
1da177e4 4051
1bd714f2 4052 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4053 if (status != -NFS4ERR_CLID_INUSE)
4054 break;
fd954ae1
TM		 4055 if (loop != 0) {
4056 ++clp->cl_id_uniquifier;
1da177e4 4057 break;
fd954ae1
TM		 4058 }
4059 ++loop;
4060 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 4061 }
4062 return status;
4063}
4064
fd954ae1 4065int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4066 struct nfs4_setclientid_res *arg,
4067 struct rpc_cred *cred)
1da177e4
LT		 4068{
4069 struct nfs_fsinfo fsinfo;
4070 struct rpc_message msg = {
4071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4072 .rpc_argp = arg,
1da177e4 4073 .rpc_resp = &fsinfo,
286d7d6a 4074 .rpc_cred = cred,
1da177e4
LT		 4075 };
4076 unsigned long now;
4077 int status;
4078
4079 now = jiffies;
1bd714f2 4080 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4081 if (status == 0) {
4082 spin_lock(&clp->cl_lock);
4083 clp->cl_lease_time = fsinfo.lease_time * HZ;
4084 clp->cl_last_renewal = now;
4085 spin_unlock(&clp->cl_lock);
4086 }
4087 return status;
4088}
4089
fe650407
TM		 4090struct nfs4_delegreturndata {
4091 struct nfs4_delegreturnargs args;
fa178f29 4092 struct nfs4_delegreturnres res;
fe650407
TM		 4093 struct nfs_fh fh;
4094 nfs4_stateid stateid;
26e976a8 4095 unsigned long timestamp;
fa178f29 4096 struct nfs_fattr fattr;
fe650407
TM		 4097 int rpc_status;
4098};
4099
fe650407
TM		 4100static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4101{
4102 struct nfs4_delegreturndata *data = calldata;
938e1010 4103
14516c3a
TM		 4104 if (!nfs4_sequence_done(task, &data->res.seq_res))
4105 return;
938e1010 4106
79708861
RL		 4107 switch (task->tk_status) {
4108 case -NFS4ERR_STALE_STATEID:
4109 case -NFS4ERR_EXPIRED:
4110 case 0:
fa178f29 4111 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4112 break;
4113 default:
4114 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4115 -EAGAIN) {
d00c5d43 4116 rpc_restart_call_prepare(task);
79708861
RL		 4117 return;
4118 }
4119 }
4120 data->rpc_status = task->tk_status;
fe650407
TM		 4121}
4122
4123static void nfs4_delegreturn_release(void *calldata)
4124{
fe650407
TM		 4125 kfree(calldata);
4126}
4127
938e1010
AA		 4128#if defined(CONFIG_NFS_V4_1)
4129static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4130{
4131 struct nfs4_delegreturndata *d_data;
4132
4133 d_data = (struct nfs4_delegreturndata *)data;
4134
035168ab 4135 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4136 &d_data->args.seq_args,
9d12b216 4137 &d_data->res.seq_res, task))
938e1010
AA		 4138 return;
4139 rpc_call_start(task);
4140}
4141#endif /* CONFIG_NFS_V4_1 */
4142
c8d149f3 4143static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4144#if defined(CONFIG_NFS_V4_1)
4145 .rpc_call_prepare = nfs4_delegreturn_prepare,
4146#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4147 .rpc_call_done = nfs4_delegreturn_done,
4148 .rpc_release = nfs4_delegreturn_release,
4149};
4150
e6f81075 4151static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4152{
4153 struct nfs4_delegreturndata *data;
fa178f29 4154 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4155 struct rpc_task *task;
5138fde0
TM		 4156 struct rpc_message msg = {
4157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4158 .rpc_cred = cred,
4159 };
c970aa85
TM		 4160 struct rpc_task_setup task_setup_data = {
4161 .rpc_client = server->client,
5138fde0 4162 .rpc_message = &msg,
c970aa85
TM		 4163 .callback_ops = &nfs4_delegreturn_ops,
4164 .flags = RPC_TASK_ASYNC,
4165 };
e6f81075 4166 int status = 0;
fe650407 4167
8535b2be 4168 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4169 if (data == NULL)
4170 return -ENOMEM;
9d12b216 4171 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4172 data->args.fhandle = &data->fh;
4173 data->args.stateid = &data->stateid;
9e907fec 4174 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4175 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4176 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4177 data->res.fattr = &data->fattr;
4178 data->res.server = server;
5138fde0 4179 nfs_fattr_init(data->res.fattr);
26e976a8 4180 data->timestamp = jiffies;
fe650407
TM		 4181 data->rpc_status = 0;
4182
c970aa85 4183 task_setup_data.callback_data = data;
1174dd1f
TM		 4184 msg.rpc_argp = &data->args;
4185 msg.rpc_resp = &data->res;
c970aa85 4186 task = rpc_run_task(&task_setup_data);
7a1218a2 4187 if (IS_ERR(task))
fe650407 4188 return PTR_ERR(task);
e6f81075
TM		 4189 if (!issync)
4190 goto out;
fe650407 4191 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4192 if (status != 0)
4193 goto out;
4194 status = data->rpc_status;
e144cbcc
TM		 4195 if (status == 0)
4196 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4197 else
4198 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4199out:
e6b3c4db 4200 rpc_put_task(task);
fe650407 4201 return status;
1da177e4
LT		 4202}
4203
e6f81075 4204int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4205{
4206 struct nfs_server *server = NFS_SERVER(inode);
4207 struct nfs4_exception exception = { };
4208 int err;
4209 do {
e6f81075 4210 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4211 switch (err) {
4212 case -NFS4ERR_STALE_STATEID:
4213 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4214 case 0:
4215 return 0;
4216 }
4217 err = nfs4_handle_exception(server, err, &exception);
4218 } while (exception.retry);
4219 return err;
4220}
4221
4222#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4223#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4224
4225/*
4226 * sleep, with exponential backoff, and retry the LOCK operation.
4227 */
4228static unsigned long
4229nfs4_set_lock_task_retry(unsigned long timeout)
4230{
d310310c 4231 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4232 timeout <<= 1;
4233 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4234 return NFS4_LOCK_MAXTIMEOUT;
4235 return timeout;
4236}
4237
1da177e4
LT		 4238static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4239{
4240 struct inode *inode = state->inode;
4241 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4242 struct nfs_client *clp = server->nfs_client;
911d1aaf 4243 struct nfs_lockt_args arg = {
1da177e4 4244 .fh = NFS_FH(inode),
911d1aaf 4245 .fl = request,
1da177e4 4246 };
911d1aaf
TM		 4247 struct nfs_lockt_res res = {
4248 .denied = request,
1da177e4
LT		 4249 };
4250 struct rpc_message msg = {
4251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4252 .rpc_argp = &arg,
4253 .rpc_resp = &res,
4254 .rpc_cred = state->owner->so_cred,
4255 };
1da177e4
LT		 4256 struct nfs4_lock_state *lsp;
4257 int status;
4258
911d1aaf 4259 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4260 status = nfs4_set_lock_state(state, request);
4261 if (status != 0)
4262 goto out;
4263 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4264 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4265 arg.lock_owner.s_dev = server->s_dev;
7c513058 4266 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4267 switch (status) {
4268 case 0:
4269 request->fl_type = F_UNLCK;
4270 break;
4271 case -NFS4ERR_DENIED:
4272 status = 0;
1da177e4 4273 }
70cc6487 4274 request->fl_ops->fl_release_private(request);
8d0a8a9d 4275out:
1da177e4
LT		 4276 return status;
4277}
4278
4279static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4280{
4281 struct nfs4_exception exception = { };
4282 int err;
4283
4284 do {
4285 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4286 _nfs4_proc_getlk(state, cmd, request),
4287 &exception);
4288 } while (exception.retry);
4289 return err;
4290}
4291
4292static int do_vfs_lock(struct file *file, struct file_lock *fl)
4293{
4294 int res = 0;
4295 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4296 case FL_POSIX:
4297 res = posix_lock_file_wait(file, fl);
4298 break;
4299 case FL_FLOCK:
4300 res = flock_lock_file_wait(file, fl);
4301 break;
4302 default:
4303 BUG();
4304 }
1da177e4
LT		 4305 return res;
4306}
4307
faf5f49c 4308struct nfs4_unlockdata {
911d1aaf
TM		 4309 struct nfs_locku_args arg;
4310 struct nfs_locku_res res;
faf5f49c
TM		 4311 struct nfs4_lock_state *lsp;
4312 struct nfs_open_context *ctx;
911d1aaf
TM		 4313 struct file_lock fl;
4314 const struct nfs_server *server;
26e976a8 4315 unsigned long timestamp;
faf5f49c
TM		 4316};
4317
911d1aaf
TM		 4318static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4319 struct nfs_open_context *ctx,
4320 struct nfs4_lock_state *lsp,
4321 struct nfs_seqid *seqid)
4322{
4323 struct nfs4_unlockdata *p;
4324 struct inode *inode = lsp->ls_state->inode;
4325
8535b2be 4326 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4327 if (p == NULL)
4328 return NULL;
4329 p->arg.fh = NFS_FH(inode);
4330 p->arg.fl = &p->fl;
4331 p->arg.seqid = seqid;
c1d51931 4332 p->res.seqid = seqid;
911d1aaf
TM		 4333 p->arg.stateid = &lsp->ls_stateid;
4334 p->lsp = lsp;
4335 atomic_inc(&lsp->ls_count);
4336 /* Ensure we don't close file until we're done freeing locks! */
4337 p->ctx = get_nfs_open_context(ctx);
4338 memcpy(&p->fl, fl, sizeof(p->fl));
4339 p->server = NFS_SERVER(inode);
4340 return p;
4341}
4342
06f814a3 4343static void nfs4_locku_release_calldata(void *data)
faf5f49c 4344{
963d8fe5 4345 struct nfs4_unlockdata *calldata = data;
911d1aaf 4346 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4347 nfs4_put_lock_state(calldata->lsp);
4348 put_nfs_open_context(calldata->ctx);
4349 kfree(calldata);
faf5f49c
TM		 4350}
4351
963d8fe5 4352static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4353{
963d8fe5 4354 struct nfs4_unlockdata *calldata = data;
faf5f49c 4355
14516c3a
TM		 4356 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4357 return;
faf5f49c
TM		 4358 switch (task->tk_status) {
4359 case 0:
f597c537
TM		 4360 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4361 &calldata->res.stateid);
26e976a8 4362 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4363 break;
9e33bed5
TM		 4364 case -NFS4ERR_BAD_STATEID:
4365 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4366 case -NFS4ERR_STALE_STATEID:
4367 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4368 break;
4369 default:
9e33bed5 4370 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4371 rpc_restart_call_prepare(task);
faf5f49c 4372 }
faf5f49c
TM		 4373}
4374
4ce70ada 4375static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4376{
4ce70ada 4377 struct nfs4_unlockdata *calldata = data;
faf5f49c 4378
911d1aaf 4379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4380 return;
4381 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4382 /* Note: exit _without_ running nfs4_locku_done */
4383 task->tk_action = NULL;
faf5f49c
TM		 4384 return;
4385 }
26e976a8 4386 calldata->timestamp = jiffies;
035168ab 4387 if (nfs4_setup_sequence(calldata->server,
a893693c 4388 &calldata->arg.seq_args,
9d12b216 4389 &calldata->res.seq_res, task))
a893693c 4390 return;
5138fde0 4391 rpc_call_start(task);
faf5f49c
TM		 4392}
4393
963d8fe5 4394static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4395 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4396 .rpc_call_done = nfs4_locku_done,
06f814a3 4397 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4398};
4399
a5d16a4d
TM		 4400static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4401 struct nfs_open_context *ctx,
4402 struct nfs4_lock_state *lsp,
4403 struct nfs_seqid *seqid)
4404{
4405 struct nfs4_unlockdata *data;
5138fde0
TM		 4406 struct rpc_message msg = {
4407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4408 .rpc_cred = ctx->cred,
4409 };
c970aa85
TM		 4410 struct rpc_task_setup task_setup_data = {
4411 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4412 .rpc_message = &msg,
c970aa85 4413 .callback_ops = &nfs4_locku_ops,
101070ca 4414 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4415 .flags = RPC_TASK_ASYNC,
4416 };
a5d16a4d 4417
137d6aca
FF		 4418 /* Ensure this is an unlock - when canceling a lock, the
4419 * canceled lock is passed in, and it won't be an unlock.
4420 */
4421 fl->fl_type = F_UNLCK;
4422
a5d16a4d
TM		 4423 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4424 if (data == NULL) {
4425 nfs_free_seqid(seqid);
4426 return ERR_PTR(-ENOMEM);
4427 }
4428
9d12b216 4429 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4430 msg.rpc_argp = &data->arg;
4431 msg.rpc_resp = &data->res;
c970aa85
TM		 4432 task_setup_data.callback_data = data;
4433 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4434}
4435
faf5f49c
TM		 4436static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4437{
19e03c57 4438 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4439 struct nfs_seqid *seqid;
1da177e4 4440 struct nfs4_lock_state *lsp;
06f814a3
TM		 4441 struct rpc_task *task;
4442 int status = 0;
536ff0f8 4443 unsigned char fl_flags = request->fl_flags;
faf5f49c 4444
8d0a8a9d 4445 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4446 /* Unlock _before_ we do the RPC call */
4447 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4448 down_read(&nfsi->rwsem);
4449 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4450 up_read(&nfsi->rwsem);
9b073574 4451 goto out;
19e03c57
TM		 4452 }
4453 up_read(&nfsi->rwsem);
8d0a8a9d 4454 if (status != 0)
9b073574
TM		 4455 goto out;
4456 /* Is this a delegated lock? */
4457 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4458 goto out;
8d0a8a9d 4459 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4460 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4461 status = -ENOMEM;
911d1aaf 4462 if (seqid == NULL)
9b073574 4463 goto out;
cd3758e3 4464 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4465 status = PTR_ERR(task);
4466 if (IS_ERR(task))
9b073574 4467 goto out;
a5d16a4d 4468 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4469 rpc_put_task(task);
9b073574 4470out:
536ff0f8 4471 request->fl_flags = fl_flags;
1da177e4
LT		 4472 return status;
4473}
4474
a5d16a4d
TM		 4475struct nfs4_lockdata {
4476 struct nfs_lock_args arg;
4477 struct nfs_lock_res res;
4478 struct nfs4_lock_state *lsp;
4479 struct nfs_open_context *ctx;
4480 struct file_lock fl;
26e976a8 4481 unsigned long timestamp;
a5d16a4d
TM		 4482 int rpc_status;
4483 int cancelled;
66179efe 4484 struct nfs_server *server;
a5d16a4d
TM		 4485};
4486
4487static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4488 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4489 gfp_t gfp_mask)
1da177e4 4490{
a5d16a4d
TM		 4491 struct nfs4_lockdata *p;
4492 struct inode *inode = lsp->ls_state->inode;
1da177e4 4493 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4494
8535b2be 4495 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4496 if (p == NULL)
4497 return NULL;
4498
4499 p->arg.fh = NFS_FH(inode);
4500 p->arg.fl = &p->fl;
8535b2be 4501 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4502 if (p->arg.open_seqid == NULL)
4503 goto out_free;
8535b2be 4504 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4505 if (p->arg.lock_seqid == NULL)
2f74c0a0 4506 goto out_free_seqid;
a5d16a4d 4507 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4508 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4509 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4510 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4511 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4512 p->lsp = lsp;
66179efe 4513 p->server = server;
a5d16a4d
TM		 4514 atomic_inc(&lsp->ls_count);
4515 p->ctx = get_nfs_open_context(ctx);
4516 memcpy(&p->fl, fl, sizeof(p->fl));
4517 return p;
2f74c0a0
TM		 4518out_free_seqid:
4519 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4520out_free:
4521 kfree(p);
4522 return NULL;
4523}
4524
4525static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4526{
4527 struct nfs4_lockdata *data = calldata;
4528 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4529
3110ff80 4530 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4531 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4532 return;
a5d16a4d
TM		 4533 /* Do we need to do an open_to_lock_owner? */
4534 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4535 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4536 return;
a5d16a4d
TM		 4537 data->arg.open_stateid = &state->stateid;
4538 data->arg.new_lock_owner = 1;
c1d51931 4539 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4540 } else
4541 data->arg.new_lock_owner = 0;
26e976a8 4542 data->timestamp = jiffies;
035168ab
TM		 4543 if (nfs4_setup_sequence(data->server,
4544 &data->arg.seq_args,
9d12b216 4545 &data->res.seq_res, task))
66179efe 4546 return;
5138fde0 4547 rpc_call_start(task);
3110ff80 4548 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4549}
4550
b257957e
AB		 4551static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4552{
4553 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4554 nfs4_lock_prepare(task, calldata);
4555}
4556
a5d16a4d
TM		 4557static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4558{
4559 struct nfs4_lockdata *data = calldata;
4560
3110ff80 4561 dprintk("%s: begin!\n", __func__);
a5d16a4d 4562
14516c3a
TM		 4563 if (!nfs4_sequence_done(task, &data->res.seq_res))
4564 return;
66179efe 4565
a5d16a4d 4566 data->rpc_status = task->tk_status;
a5d16a4d 4567 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4568 if (data->rpc_status == 0)
4569 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4570 else
4571 goto out;
4572 }
4573 if (data->rpc_status == 0) {
f597c537 4574 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4575 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4576 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4577 }
a5d16a4d 4578out:
3110ff80 4579 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4580}
4581
4582static void nfs4_lock_release(void *calldata)
4583{
4584 struct nfs4_lockdata *data = calldata;
4585
3110ff80 4586 dprintk("%s: begin!\n", __func__);
2f74c0a0 4587 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4588 if (data->cancelled != 0) {
4589 struct rpc_task *task;
4590 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4591 data->arg.lock_seqid);
4592 if (!IS_ERR(task))
bf294b41 4593 rpc_put_task_async(task);
3110ff80 4594 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4595 } else
4596 nfs_free_seqid(data->arg.lock_seqid);
4597 nfs4_put_lock_state(data->lsp);
4598 put_nfs_open_context(data->ctx);
4599 kfree(data);
3110ff80 4600 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4601}
4602
4603static const struct rpc_call_ops nfs4_lock_ops = {
4604 .rpc_call_prepare = nfs4_lock_prepare,
4605 .rpc_call_done = nfs4_lock_done,
4606 .rpc_release = nfs4_lock_release,
4607};
4608
b257957e
AB		 4609static const struct rpc_call_ops nfs4_recover_lock_ops = {
4610 .rpc_call_prepare = nfs4_recover_lock_prepare,
4611 .rpc_call_done = nfs4_lock_done,
4612 .rpc_release = nfs4_lock_release,
4613};
4614
2bee72a6
TM		 4615static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4616{
2bee72a6
TM		 4617 switch (error) {
4618 case -NFS4ERR_ADMIN_REVOKED:
4619 case -NFS4ERR_BAD_STATEID:
ecac799a 4620 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4621 if (new_lock_owner != 0 ||
4622 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4623 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4624 break;
4625 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4626 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4627 case -NFS4ERR_EXPIRED:
4628 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4629 };
4630}
4631
afe6c27c 4632static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4633{
4634 struct nfs4_lockdata *data;
4635 struct rpc_task *task;
5138fde0
TM		 4636 struct rpc_message msg = {
4637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4638 .rpc_cred = state->owner->so_cred,
4639 };
c970aa85
TM		 4640 struct rpc_task_setup task_setup_data = {
4641 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4642 .rpc_message = &msg,
c970aa85 4643 .callback_ops = &nfs4_lock_ops,
101070ca 4644 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4645 .flags = RPC_TASK_ASYNC,
4646 };
a5d16a4d
TM		 4647 int ret;
4648
3110ff80 4649 dprintk("%s: begin!\n", __func__);
cd3758e3 4650 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4651 fl->fl_u.nfs4_fl.owner,
4652 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4653 if (data == NULL)
4654 return -ENOMEM;
4655 if (IS_SETLKW(cmd))
4656 data->arg.block = 1;
b257957e
AB		 4657 if (recovery_type > NFS_LOCK_NEW) {
4658 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4659 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4660 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4661 }
9d12b216 4662 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4663 msg.rpc_argp = &data->arg;
4664 msg.rpc_resp = &data->res;
c970aa85
TM		 4665 task_setup_data.callback_data = data;
4666 task = rpc_run_task(&task_setup_data);
7a1218a2 4667 if (IS_ERR(task))
a5d16a4d 4668 return PTR_ERR(task);
a5d16a4d
TM		 4669 ret = nfs4_wait_for_completion_rpc_task(task);
4670 if (ret == 0) {
4671 ret = data->rpc_status;
2bee72a6
TM		 4672 if (ret)
4673 nfs4_handle_setlk_error(data->server, data->lsp,
4674 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4675 } else
4676 data->cancelled = 1;
e6b3c4db 4677 rpc_put_task(task);
3110ff80 4678 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4679 return ret;
1da177e4
LT		 4680}
4681
4682static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4683{
202b50dc 4684 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4685 struct nfs4_exception exception = {
4686 .inode = state->inode,
4687 };
202b50dc
TM		 4688 int err;
4689
4690 do {
42a2d13e
TM		 4691 /* Cache the lock if possible... */
4692 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4693 return 0;
afe6c27c 4694 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4695 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4696 break;
4697 nfs4_handle_exception(server, err, &exception);
4698 } while (exception.retry);
4699 return err;
1da177e4
LT		 4700}
4701
4702static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4703{
202b50dc 4704 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4705 struct nfs4_exception exception = {
4706 .inode = state->inode,
4707 };
202b50dc
TM		 4708 int err;
4709
6bfc93ef
TM		 4710 err = nfs4_set_lock_state(state, request);
4711 if (err != 0)
4712 return err;
202b50dc 4713 do {
42a2d13e
TM		 4714 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4715 return 0;
afe6c27c 4716 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4717 switch (err) {
4718 default:
4719 goto out;
4720 case -NFS4ERR_GRACE:
4721 case -NFS4ERR_DELAY:
4722 nfs4_handle_exception(server, err, &exception);
4723 err = 0;
4724 }
202b50dc 4725 } while (exception.retry);
a9ed2e25 4726out:
202b50dc 4727 return err;
1da177e4
LT		 4728}
4729
f062eb6c 4730#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4731/**
4732 * nfs41_check_expired_locks - possibly free a lock stateid
4733 *
4734 * @state: NFSv4 state for an inode
4735 *
4736 * Returns NFS_OK if recovery for this stateid is now finished.
4737 * Otherwise a negative NFS4ERR value is returned.
4738 */
b01dd1d8 4739static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4740{
eb64cf96 4741 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4742 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4743 struct nfs_server *server = NFS_SERVER(state->inode);
4744
b01dd1d8
BS		 4745 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4746 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4747 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4748 if (status != NFS_OK) {
3e60ffdd
CL		 4749 /* Free the stateid unless the server
4750 * informs us the stateid is unrecognized. */
89af2739
CL		 4751 if (status != -NFS4ERR_BAD_STATEID)
4752 nfs41_free_stateid(server,
4753 &lsp->ls_stateid);
b01dd1d8
BS		 4754 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4755 ret = status;
4756 }
4757 }
4758 };
4759
4760 return ret;
4761}
4762
4763static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4764{
4765 int status = NFS_OK;
4766
4767 if (test_bit(LK_STATE_IN_USE, &state->flags))
4768 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4769 if (status != NFS_OK)
4770 status = nfs4_lock_expired(state, request);
4771 return status;
f062eb6c
BS		 4772}
4773#endif
4774
1da177e4
LT		 4775static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4776{
19e03c57 4777 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4778 unsigned char fl_flags = request->fl_flags;
8e469ebd 4779 int status = -ENOLCK;
1da177e4 4780
8e469ebd
TM		 4781 if ((fl_flags & FL_POSIX) &&
4782 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4783 goto out;
6bfc93ef 4784 /* Is this a delegated open? */
6bfc93ef
TM		 4785 status = nfs4_set_lock_state(state, request);
4786 if (status != 0)
4787 goto out;
01c3b861
TM		 4788 request->fl_flags |= FL_ACCESS;
4789 status = do_vfs_lock(request->fl_file, request);
4790 if (status < 0)
4791 goto out;
19e03c57 4792 down_read(&nfsi->rwsem);
01c3b861 4793 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4794 /* Yes: cache locks! */
01c3b861 4795 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4796 request->fl_flags = fl_flags & ~FL_SLEEP;
4797 status = do_vfs_lock(request->fl_file, request);
4798 goto out_unlock;
01c3b861 4799 }
afe6c27c 4800 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4801 if (status != 0)
01c3b861 4802 goto out_unlock;
6bfc93ef 4803 /* Note: we always want to sleep here! */
01c3b861 4804 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4805 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4806 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4807 "manager!\n", __func__);
01c3b861 4808out_unlock:
19e03c57 4809 up_read(&nfsi->rwsem);
01c3b861
TM		 4810out:
4811 request->fl_flags = fl_flags;
1da177e4
LT		 4812 return status;
4813}
4814
4815static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4816{
a1d0b5ee
TM		 4817 struct nfs4_exception exception = {
4818 .state = state,
05ffe24f 4819 .inode = state->inode,
a1d0b5ee 4820 };
1da177e4
LT		 4821 int err;
4822
4823 do {
965b5d67
TM		 4824 err = _nfs4_proc_setlk(state, cmd, request);
4825 if (err == -NFS4ERR_DENIED)
4826 err = -EAGAIN;
1da177e4 4827 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4828 err, &exception);
1da177e4
LT		 4829 } while (exception.retry);
4830 return err;
4831}
4832
4833static int
4834nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4835{
4836 struct nfs_open_context *ctx;
4837 struct nfs4_state *state;
4838 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4839 int status;
4840
4841 /* verify open state */
cd3758e3 4842 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4843 state = ctx->state;
4844
4845 if (request->fl_start < 0 || request->fl_end < 0)
4846 return -EINVAL;
4847
d953126a
TM		 4848 if (IS_GETLK(cmd)) {
4849 if (state != NULL)
4850 return nfs4_proc_getlk(state, F_GETLK, request);
4851 return 0;
4852 }
1da177e4
LT		 4853
4854 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4855 return -EINVAL;
4856
d953126a
TM		 4857 if (request->fl_type == F_UNLCK) {
4858 if (state != NULL)
4859 return nfs4_proc_unlck(state, cmd, request);
4860 return 0;
4861 }
1da177e4 4862
d953126a
TM		 4863 if (state == NULL)
4864 return -ENOLCK;
55725513
TM		 4865 /*
4866 * Don't rely on the VFS having checked the file open mode,
4867 * since it won't do this for flock() locks.
4868 */
4869 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4870 case F_RDLCK:
4871 if (!(filp->f_mode & FMODE_READ))
4872 return -EBADF;
4873 break;
4874 case F_WRLCK:
4875 if (!(filp->f_mode & FMODE_WRITE))
4876 return -EBADF;
4877 }
4878
1da177e4
LT		 4879 do {
4880 status = nfs4_proc_setlk(state, cmd, request);
4881 if ((status != -EAGAIN) || IS_SETLK(cmd))
4882 break;
4883 timeout = nfs4_set_lock_task_retry(timeout);
4884 status = -ERESTARTSYS;
4885 if (signalled())
4886 break;
4887 } while(status < 0);
1da177e4
LT		 4888 return status;
4889}
4890
888e694c
TM		 4891int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4892{
4893 struct nfs_server *server = NFS_SERVER(state->inode);
4894 struct nfs4_exception exception = { };
4895 int err;
4896
4897 err = nfs4_set_lock_state(state, fl);
4898 if (err != 0)
4899 goto out;
4900 do {
afe6c27c 4901 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4902 switch (err) {
4903 default:
a030889a
WAA		 4904 printk(KERN_ERR "NFS: %s: unhandled error "
4905 "%d.\n", __func__, err);
d5122201 4906 case 0:
965b5d67 4907 case -ESTALE:
d5122201
TM		 4908 goto out;
4909 case -NFS4ERR_EXPIRED:
0ced63d1 4910 nfs4_schedule_stateid_recovery(server, state);
d5122201 4911 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4912 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4913 nfs4_schedule_lease_recovery(server->nfs_client);
4914 goto out;
74e7bb73
RL		 4915 case -NFS4ERR_BADSESSION:
4916 case -NFS4ERR_BADSLOT:
4917 case -NFS4ERR_BAD_HIGH_SLOT:
4918 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4919 case -NFS4ERR_DEADSESSION:
9f594791 4920 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4921 goto out;
965b5d67
TM		 4922 case -ERESTARTSYS:
4923 /*
4924 * The show must go on: exit, but mark the
4925 * stateid as needing recovery.
4926 */
a1d0b5ee 4927 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4928 case -NFS4ERR_ADMIN_REVOKED:
4929 case -NFS4ERR_BAD_STATEID:
4930 case -NFS4ERR_OPENMODE:
0400a6b0 4931 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4932 err = 0;
4933 goto out;
168667c4
TM		 4934 case -EKEYEXPIRED:
4935 /*
4936 * User RPCSEC_GSS context has expired.
4937 * We cannot recover this stateid now, so
4938 * skip it and allow recovery thread to
4939 * proceed.
4940 */
4941 err = 0;
4942 goto out;
965b5d67
TM		 4943 case -ENOMEM:
4944 case -NFS4ERR_DENIED:
4945 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4946 err = 0;
4947 goto out;
d5122201
TM		 4948 case -NFS4ERR_DELAY:
4949 break;
4950 }
888e694c
TM		 4951 err = nfs4_handle_exception(server, err, &exception);
4952 } while (exception.retry);
4953out:
4954 return err;
4955}
6b3b5496 4956
cf470c3e
TM		 4957struct nfs_release_lockowner_data {
4958 struct nfs4_lock_state *lsp;
5ae67c4f 4959 struct nfs_server *server;
cf470c3e
TM		 4960 struct nfs_release_lockowner_args args;
4961};
4962
d3c7b7cc
TM		 4963static void nfs4_release_lockowner_release(void *calldata)
4964{
cf470c3e 4965 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4966 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4967 kfree(calldata);
4968}
4969
17280175 4970static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4971 .rpc_release = nfs4_release_lockowner_release,
4972};
4973
cf470c3e 4974int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4975{
4976 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4977 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4978 struct rpc_message msg = {
4979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4980 };
4981
4982 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4983 return -EINVAL;
4984 data = kmalloc(sizeof(*data), GFP_NOFS);
4985 if (!data)
4986 return -ENOMEM;
4987 data->lsp = lsp;
5ae67c4f 4988 data->server = server;
cf470c3e
TM		 4989 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4990 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4991 data->args.lock_owner.s_dev = server->s_dev;
4992 msg.rpc_argp = &data->args;
4993 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4994 return 0;
d3c7b7cc
TM		 4995}
4996
aa1870af
BF		 4997#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4998
64c2ce8b
AK		 4999static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5000 const void *buf, size_t buflen,
5001 int flags, int type)
6b3b5496 5002{
64c2ce8b
AK		 5003 if (strcmp(key, "") != 0)
5004 return -EINVAL;
4b580ee3 5005
64c2ce8b 5006 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5007}
5008
64c2ce8b
AK		 5009static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5010 void *buf, size_t buflen, int type)
6b3b5496 5011{
64c2ce8b
AK		 5012 if (strcmp(key, "") != 0)
5013 return -EINVAL;
aa1870af 5014
64c2ce8b 5015 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5016}
5017
64c2ce8b
AK		 5018static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5019 size_t list_len, const char *name,
5020 size_t name_len, int type)
6b3b5496 5021{
64c2ce8b 5022 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5023
096455a2
BF		 5024 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5025 return 0;
64c2ce8b
AK		 5026
5027 if (list && len <= list_len)
5028 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5029 return len;
6b3b5496
BF		 5030}
5031
533eb461
AA		 5032/*
5033 * nfs_fhget will use either the mounted_on_fileid or the fileid
5034 */
69aaaae1
TM		 5035static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5036{
533eb461
AA		 5037 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5038 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5039 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5040 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5041 return;
5042
5043 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5044 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5045 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5046 fattr->nlink = 2;
5047}
5048
f05d147f
BS		 5049static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5050 const struct qstr *name,
5051 struct nfs4_fs_locations *fs_locations,
5052 struct page *page)
683b57b4
TM		 5053{
5054 struct nfs_server *server = NFS_SERVER(dir);
5055 u32 bitmask[2] = {
361e624f 5056 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5057 };
5058 struct nfs4_fs_locations_arg args = {
5059 .dir_fh = NFS_FH(dir),
c228fd3a 5060 .name = name,
683b57b4
TM		 5061 .page = page,
5062 .bitmask = bitmask,
5063 };
22958463
BH		 5064 struct nfs4_fs_locations_res res = {
5065 .fs_locations = fs_locations,
5066 };
683b57b4
TM		 5067 struct rpc_message msg = {
5068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5069 .rpc_argp = &args,
22958463 5070 .rpc_resp = &res,
683b57b4
TM		 5071 };
5072 int status;
5073
3110ff80 5074 dprintk("%s: start\n", __func__);
533eb461
AA		 5075
5076 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5077 * is not supported */
5078 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5079 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5080 else
5081 bitmask[0] |= FATTR4_WORD0_FILEID;
5082
c228fd3a 5083 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5084 fs_locations->server = server;
830b8e33 5085 fs_locations->nlocations = 0;
f05d147f 5086 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5087 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5088 return status;
5089}
5090
f05d147f
BS		 5091int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5092 const struct qstr *name,
5093 struct nfs4_fs_locations *fs_locations,
5094 struct page *page)
db0a9593
BS		 5095{
5096 struct nfs4_exception exception = { };
5097 int err;
5098 do {
5099 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5100 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5101 &exception);
5102 } while (exception.retry);
5103 return err;
5104}
5105
5a5ea0d4
BS		 5106static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5107{
5108 int status;
5109 struct nfs4_secinfo_arg args = {
5110 .dir_fh = NFS_FH(dir),
5111 .name = name,
5112 };
5113 struct nfs4_secinfo_res res = {
5114 .flavors = flavors,
5115 };
5116 struct rpc_message msg = {
5117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5118 .rpc_argp = &args,
5119 .rpc_resp = &res,
5120 };
5121
5122 dprintk("NFS call secinfo %s\n", name->name);
5123 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5124 dprintk("NFS reply secinfo: %d\n", status);
5125 return status;
5126}
5127
72de53ec
BS		 5128int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5129 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5130{
5131 struct nfs4_exception exception = { };
5132 int err;
5133 do {
5134 err = nfs4_handle_exception(NFS_SERVER(dir),
5135 _nfs4_proc_secinfo(dir, name, flavors),
5136 &exception);
5137 } while (exception.retry);
5138 return err;
5139}
5140
557134a3 5141#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5142/*
5143 * Check the exchange flags returned by the server for invalid flags, having
5144 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5145 * DS flags set.
5146 */
5147static int nfs4_check_cl_exchange_flags(u32 flags)
5148{
5149 if (flags & ~EXCHGID4_FLAG_MASK_R)
5150 goto out_inval;
5151 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5152 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5153 goto out_inval;
5154 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5155 goto out_inval;
5156 return NFS_OK;
5157out_inval:
5158 return -NFS4ERR_INVAL;
5159}
5160
78fe0f41 5161static bool
79d4e1f0
CL		 5162nfs41_same_server_scope(struct nfs41_server_scope *a,
5163 struct nfs41_server_scope *b)
78fe0f41
WAA		 5164{
5165 if (a->server_scope_sz == b->server_scope_sz &&
5166 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5167 return true;
5168
5169 return false;
5170}
5171
7c44f1ae
WAA		 5172/*
5173 * nfs4_proc_bind_conn_to_session()
5174 *
5175 * The 4.1 client currently uses the same TCP connection for the
5176 * fore and backchannel.
5177 */
2cf047c9 5178int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5179{
5180 int status;
5181 struct nfs41_bind_conn_to_session_res res;
5182 struct rpc_message msg = {
5183 .rpc_proc =
5184 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5185 .rpc_argp = clp,
5186 .rpc_resp = &res,
2cf047c9 5187 .rpc_cred = cred,
7c44f1ae
WAA		 5188 };
5189
5190 dprintk("--> %s\n", __func__);
5191 BUG_ON(clp == NULL);
5192
5193 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5194 if (unlikely(res.session == NULL)) {
5195 status = -ENOMEM;
5196 goto out;
5197 }
5198
5199 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5200 if (status == 0) {
5201 if (memcmp(res.session->sess_id.data,
5202 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5203 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5204 status = -EIO;
5205 goto out_session;
5206 }
5207 if (res.dir != NFS4_CDFS4_BOTH) {
5208 dprintk("NFS: %s: Unexpected direction from server\n",
5209 __func__);
5210 status = -EIO;
5211 goto out_session;
5212 }
5213 if (res.use_conn_in_rdma_mode) {
5214 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5215 __func__);
5216 status = -EIO;
5217 goto out_session;
5218 }
5219 }
5220out_session:
5221 kfree(res.session);
5222out:
5223 dprintk("<-- %s status= %d\n", __func__, status);
5224 return status;
5225}
5226
99fe60d0
BH		 5227/*
5228 * nfs4_proc_exchange_id()
5229 *
5230 * Since the clientid has expired, all compounds using sessions
5231 * associated with the stale clientid will be returning
5232 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5233 * be in some phase of session reset.
5234 */
4d643d1d 5235int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5236{
5237 nfs4_verifier verifier;
5238 struct nfs41_exchange_id_args args = {
cd93710e 5239 .verifier = &verifier,
99fe60d0 5240 .client = clp,
357f54d6 5241 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5242 };
5243 struct nfs41_exchange_id_res res = {
32b01310 5244 0
99fe60d0
BH		 5245 };
5246 int status;
5247 struct rpc_message msg = {
5248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5249 .rpc_argp = &args,
5250 .rpc_resp = &res,
5251 .rpc_cred = cred,
5252 };
99fe60d0
BH		 5253
5254 dprintk("--> %s\n", __func__);
5255 BUG_ON(clp == NULL);
a7b72103 5256
f092075d 5257 nfs4_init_boot_verifier(clp, &verifier);
99fe60d0 5258
c7a360b0 5259 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5260 "%s/%s/%u",
c7a360b0 5261 clp->cl_ipaddr,
3617e503 5262 clp->cl_rpcclient->cl_nodename,
c7a360b0 5263 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5264
acdeb69d 5265 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5266 GFP_NOFS);
acdeb69d 5267 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5268 status = -ENOMEM;
5269 goto out;
5270 }
78fe0f41 5271
79d4e1f0 5272 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5273 GFP_NOFS);
177313f1 5274 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5275 status = -ENOMEM;
acdeb69d 5276 goto out_server_owner;
abe9a6d5 5277 }
78fe0f41 5278
bbafffd2 5279 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5280 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5281 status = -ENOMEM;
5282 goto out_server_scope;
5283 }
5284
1bd714f2 5285 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5286 if (status == 0)
32b01310 5287 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5288
acdeb69d 5289 if (status == 0) {
32b01310
TM		 5290 clp->cl_clientid = res.clientid;
5291 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5292 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5293 clp->cl_seqid = res.seqid;
5294
acdeb69d
CL		 5295 kfree(clp->cl_serverowner);
5296 clp->cl_serverowner = res.server_owner;
5297 res.server_owner = NULL;
78fe0f41 5298
7d2ed9ac 5299 /* use the most recent implementation id */
59155546
CL		 5300 kfree(clp->cl_implid);
5301 clp->cl_implid = res.impl_id;
7d2ed9ac 5302
177313f1 5303 if (clp->cl_serverscope != NULL &&
79d4e1f0 5304 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5305 res.server_scope)) {
5306 dprintk("%s: server_scope mismatch detected\n",
5307 __func__);
5308 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5309 kfree(clp->cl_serverscope);
5310 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5311 }
5312
177313f1 5313 if (clp->cl_serverscope == NULL) {
79d4e1f0 5314 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5315 goto out;
5316 }
32b01310
TM		 5317 } else
5318 kfree(res.impl_id);
7d2ed9ac 5319
acdeb69d
CL		 5320out_server_owner:
5321 kfree(res.server_owner);
7d2ed9ac 5322out_server_scope:
abe9a6d5
WAA		 5323 kfree(res.server_scope);
5324out:
177313f1 5325 if (clp->cl_implid != NULL)
7d2ed9ac
WAA		 5326 dprintk("%s: Server Implementation ID: "
5327 "domain: %s, name: %s, date: %llu,%u\n",
59155546
CL		 5328 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5329 clp->cl_implid->date.seconds,
5330 clp->cl_implid->date.nseconds);
99fe60d0
BH		 5331 dprintk("<-- %s status= %d\n", __func__, status);
5332 return status;
5333}
5334
66245539
TM		 5335static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5336 struct rpc_cred *cred)
5337{
5338 struct rpc_message msg = {
5339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5340 .rpc_argp = clp,
5341 .rpc_cred = cred,
5342 };
5343 int status;
5344
5345 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5346 if (status)
02c67525 5347 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5348 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5349 return status;
5350}
5351
5352static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5353 struct rpc_cred *cred)
5354{
5355 unsigned int loop;
5356 int ret;
5357
5358 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5359 ret = _nfs4_proc_destroy_clientid(clp, cred);
5360 switch (ret) {
5361 case -NFS4ERR_DELAY:
5362 case -NFS4ERR_CLIENTID_BUSY:
5363 ssleep(1);
5364 break;
5365 default:
5366 return ret;
5367 }
5368 }
5369 return 0;
5370}
5371
5372int nfs4_destroy_clientid(struct nfs_client *clp)
5373{
5374 struct rpc_cred *cred;
5375 int ret = 0;
5376
5377 if (clp->cl_mvops->minor_version < 1)
5378 goto out;
5379 if (clp->cl_exchange_flags == 0)
5380 goto out;
5381 cred = nfs4_get_exchange_id_cred(clp);
5382 ret = nfs4_proc_destroy_clientid(clp, cred);
5383 if (cred)
5384 put_rpccred(cred);
5385 switch (ret) {
5386 case 0:
5387 case -NFS4ERR_STALE_CLIENTID:
5388 clp->cl_exchange_flags = 0;
5389 }
5390out:
5391 return ret;
5392}
5393
2050f0cc
AA		 5394struct nfs4_get_lease_time_data {
5395 struct nfs4_get_lease_time_args *args;
5396 struct nfs4_get_lease_time_res *res;
5397 struct nfs_client *clp;
5398};
5399
5400static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5401 void *calldata)
5402{
5403 int ret;
5404 struct nfs4_get_lease_time_data *data =
5405 (struct nfs4_get_lease_time_data *)calldata;
5406
5407 dprintk("--> %s\n", __func__);
689cf5c1 5408 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5409 /* just setup sequence, do not trigger session recovery
5410 since we're invoked within one */
5411 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5412 &data->args->la_seq_args,
9d12b216 5413 &data->res->lr_seq_res, task);
2050f0cc
AA		 5414
5415 BUG_ON(ret == -EAGAIN);
5416 rpc_call_start(task);
5417 dprintk("<-- %s\n", __func__);
5418}
5419
5420/*
5421 * Called from nfs4_state_manager thread for session setup, so don't recover
5422 * from sequence operation or clientid errors.
5423 */
5424static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5425{
5426 struct nfs4_get_lease_time_data *data =
5427 (struct nfs4_get_lease_time_data *)calldata;
5428
5429 dprintk("--> %s\n", __func__);
14516c3a
TM		 5430 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5431 return;
2050f0cc
AA		 5432 switch (task->tk_status) {
5433 case -NFS4ERR_DELAY:
5434 case -NFS4ERR_GRACE:
5435 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5436 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5437 task->tk_status = 0;
a8a4ae3a
AA		 5438 /* fall through */
5439 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5440 rpc_restart_call_prepare(task);
2050f0cc
AA		 5441 return;
5442 }
2050f0cc
AA		 5443 dprintk("<-- %s\n", __func__);
5444}
5445
17280175 5446static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5447 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5448 .rpc_call_done = nfs4_get_lease_time_done,
5449};
5450
5451int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5452{
5453 struct rpc_task *task;
5454 struct nfs4_get_lease_time_args args;
5455 struct nfs4_get_lease_time_res res = {
5456 .lr_fsinfo = fsinfo,
5457 };
5458 struct nfs4_get_lease_time_data data = {
5459 .args = &args,
5460 .res = &res,
5461 .clp = clp,
5462 };
5463 struct rpc_message msg = {
5464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5465 .rpc_argp = &args,
5466 .rpc_resp = &res,
5467 };
5468 struct rpc_task_setup task_setup = {
5469 .rpc_client = clp->cl_rpcclient,
5470 .rpc_message = &msg,
5471 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5472 .callback_data = &data,
5473 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5474 };
5475 int status;
5476
9d12b216 5477 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5478 dprintk("--> %s\n", __func__);
5479 task = rpc_run_task(&task_setup);
5480
5481 if (IS_ERR(task))
5482 status = PTR_ERR(task);
5483 else {
5484 status = task->tk_status;
5485 rpc_put_task(task);
5486 }
5487 dprintk("<-- %s return %d\n", __func__, status);
5488
5489 return status;
5490}
5491
f86f36a6
TM		 5492static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5493{
5494 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5495}
5496
5497static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5498 struct nfs4_slot *new,
5499 u32 max_slots,
5500 u32 ivalue)
5501{
5502 struct nfs4_slot *old = NULL;
5503 u32 i;
5504
5505 spin_lock(&tbl->slot_tbl_lock);
5506 if (new) {
5507 old = tbl->slots;
5508 tbl->slots = new;
5509 tbl->max_slots = max_slots;
5510 }
5511 tbl->highest_used_slotid = -1; /* no slot is currently used */
5512 for (i = 0; i < tbl->max_slots; i++)
5513 tbl->slots[i].seq_nr = ivalue;
5514 spin_unlock(&tbl->slot_tbl_lock);
5515 kfree(old);
5516}
5517
b73dafa7 5518/*
f86f36a6 5519 * (re)Initialise a slot table
b73dafa7 5520 */
f86f36a6
TM		 5521static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5522 u32 ivalue)
ac72b7b3 5523{
104aeba4 5524 struct nfs4_slot *new = NULL;
f86f36a6 5525 int ret = -ENOMEM;
ac72b7b3 5526
104aeba4
AA		 5527 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5528 max_reqs, tbl->max_slots);
ac72b7b3 5529
104aeba4
AA		 5530 /* Does the newly negotiated max_reqs match the existing slot table? */
5531 if (max_reqs != tbl->max_slots) {
f86f36a6 5532 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5533 if (!new)
5534 goto out;
104aeba4 5535 }
f86f36a6
TM		 5536 ret = 0;
5537
5538 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5539 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5540 tbl, tbl->slots, tbl->max_slots);
5541out:
5542 dprintk("<-- %s: return %d\n", __func__, ret);
5543 return ret;
5544}
5545
f8625a6a
RL		 5546/* Destroy the slot table */
5547static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5548{
5549 if (session->fc_slot_table.slots != NULL) {
5550 kfree(session->fc_slot_table.slots);
5551 session->fc_slot_table.slots = NULL;
5552 }
5553 if (session->bc_slot_table.slots != NULL) {
5554 kfree(session->bc_slot_table.slots);
5555 session->bc_slot_table.slots = NULL;
5556 }
5557 return;
5558}
5559
050047ce 5560/*
aacd5537 5561 * Initialize or reset the forechannel and backchannel tables
050047ce 5562 */
aacd5537 5563static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5564{
f26468fb 5565 struct nfs4_slot_table *tbl;
aacd5537 5566 int status;
050047ce 5567
aacd5537
AA		 5568 dprintk("--> %s\n", __func__);
5569 /* Fore channel */
5570 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5571 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5572 if (status) /* -ENOMEM */
5573 return status;
aacd5537
AA		 5574 /* Back channel */
5575 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5576 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5577 if (status && tbl->slots == NULL)
5578 /* Fore and back channel share a connection so get
5579 * both slot tables or neither */
5580 nfs4_destroy_slot_tables(ses);
f8625a6a 5581 return status;
557134a3
AA		 5582}
5583
5584struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5585{
5586 struct nfs4_session *session;
5587 struct nfs4_slot_table *tbl;
5588
8535b2be 5589 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5590 if (!session)
5591 return NULL;
76db6d95 5592
557134a3 5593 tbl = &session->fc_slot_table;
45d43c29 5594 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5595 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5596 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5597 init_completion(&tbl->complete);
f8625a6a
RL		 5598
5599 tbl = &session->bc_slot_table;
45d43c29 5600 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5601 spin_lock_init(&tbl->slot_tbl_lock);
5602 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5603 init_completion(&tbl->complete);
f8625a6a 5604
1055d76d
TM		 5605 session->session_state = 1<<NFS4_SESSION_INITING;
5606
557134a3
AA		 5607 session->clp = clp;
5608 return session;
5609}
5610
5611void nfs4_destroy_session(struct nfs4_session *session)
5612{
2446ab60 5613 struct rpc_xprt *xprt;
848f5bda 5614 struct rpc_cred *cred;
2446ab60 5615
848f5bda
TM		 5616 cred = nfs4_get_exchange_id_cred(session->clp);
5617 nfs4_proc_destroy_session(session, cred);
5618 if (cred)
5619 put_rpccred(cred);
2446ab60
TM		 5620
5621 rcu_read_lock();
5622 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5623 rcu_read_unlock();
5a0ffe54 5624 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5625 __func__, xprt);
5626 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5627 nfs4_destroy_slot_tables(session);
557134a3
AA		 5628 kfree(session);
5629}
5630
fc931582
AA		 5631/*
5632 * Initialize the values to be used by the client in CREATE_SESSION
5633 * If nfs4_init_session set the fore channel request and response sizes,
5634 * use them.
5635 *
5636 * Set the back channel max_resp_sz_cached to zero to force the client to
5637 * always set csa_cachethis to FALSE because the current implementation
5638 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5639 */
5640static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5641{
5642 struct nfs4_session *session = args->client->cl_session;
5643 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5644 mxresp_sz = session->fc_attrs.max_resp_sz;
5645
5646 if (mxrqst_sz == 0)
5647 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5648 if (mxresp_sz == 0)
5649 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5650 /* Fore channel attributes */
fc931582
AA		 5651 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5652 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5653 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5654 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5655
5656 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5657 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5658 __func__,
5659 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5660 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5661
5662 /* Back channel attributes */
fc931582
AA		 5663 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5664 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5665 args->bc_attrs.max_resp_sz_cached = 0;
5666 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5667 args->bc_attrs.max_reqs = 1;
5668
5669 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5670 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5671 __func__,
5672 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5673 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5674 args->bc_attrs.max_reqs);
5675}
5676
43c2e885 5677static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5678{
43c2e885
BF		 5679 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5680 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5681
43c2e885
BF		 5682 if (rcvd->max_resp_sz > sent->max_resp_sz)
5683 return -EINVAL;
5684 /*
5685 * Our requested max_ops is the minimum we need; we're not
5686 * prepared to break up compounds into smaller pieces than that.
5687 * So, no point even trying to continue if the server won't
5688 * cooperate:
5689 */
5690 if (rcvd->max_ops < sent->max_ops)
5691 return -EINVAL;
5692 if (rcvd->max_reqs == 0)
5693 return -EINVAL;
b4b9a0c1
VG		 5694 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5695 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5696 return 0;
8d35301d
AA		 5697}
5698
43c2e885
BF		 5699static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5700{
5701 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5702 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5703
43c2e885
BF		 5704 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5705 return -EINVAL;
5706 if (rcvd->max_resp_sz < sent->max_resp_sz)
5707 return -EINVAL;
5708 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5709 return -EINVAL;
5710 /* These would render the backchannel useless: */
b4b9a0c1 5711 if (rcvd->max_ops != sent->max_ops)
43c2e885 5712 return -EINVAL;
b4b9a0c1 5713 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5714 return -EINVAL;
5715 return 0;
5716}
8d35301d 5717
8d35301d
AA		 5718static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5719 struct nfs4_session *session)
5720{
43c2e885 5721 int ret;
8d35301d 5722
43c2e885
BF		 5723 ret = nfs4_verify_fore_channel_attrs(args, session);
5724 if (ret)
5725 return ret;
5726 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5727}
5728
848f5bda
TM		 5729static int _nfs4_proc_create_session(struct nfs_client *clp,
5730 struct rpc_cred *cred)
fc931582
AA		 5731{
5732 struct nfs4_session *session = clp->cl_session;
5733 struct nfs41_create_session_args args = {
5734 .client = clp,
5735 .cb_program = NFS4_CALLBACK,
5736 };
5737 struct nfs41_create_session_res res = {
5738 .client = clp,
5739 };
5740 struct rpc_message msg = {
5741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5742 .rpc_argp = &args,
5743 .rpc_resp = &res,
848f5bda 5744 .rpc_cred = cred,
fc931582
AA		 5745 };
5746 int status;
5747
5748 nfs4_init_channel_attrs(&args);
0f91421e 5749 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5750
1bd714f2 5751 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5752
8d35301d
AA		 5753 if (!status)
5754 /* Verify the session's negotiated channel_attrs values */
5755 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5756 if (!status) {
5757 /* Increment the clientid slot sequence id */
5758 clp->cl_seqid++;
5759 }
5760
5761 return status;
5762}
5763
5764/*
5765 * Issues a CREATE_SESSION operation to the server.
5766 * It is the responsibility of the caller to verify the session is
5767 * expired before calling this routine.
5768 */
848f5bda 5769int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5770{
5771 int status;
5772 unsigned *ptr;
fc931582
AA		 5773 struct nfs4_session *session = clp->cl_session;
5774
5775 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5776
848f5bda 5777 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5778 if (status)
5779 goto out;
5780
aacd5537
AA		 5781 /* Init or reset the session slot tables */
5782 status = nfs4_setup_session_slot_tables(session);
5783 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5784 if (status)
5785 goto out;
5786
5787 ptr = (unsigned *)&session->sess_id.data[0];
5788 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5789 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5790out:
5791 dprintk("<-- %s\n", __func__);
5792 return status;
5793}
5794
0f3e66c6
AA		 5795/*
5796 * Issue the over-the-wire RPC DESTROY_SESSION.
5797 * The caller must serialize access to this routine.
5798 */
848f5bda
TM		 5799int nfs4_proc_destroy_session(struct nfs4_session *session,
5800 struct rpc_cred *cred)
0f3e66c6 5801{
848f5bda
TM		 5802 struct rpc_message msg = {
5803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5804 .rpc_argp = session,
5805 .rpc_cred = cred,
5806 };
0f3e66c6 5807 int status = 0;
0f3e66c6
AA		 5808
5809 dprintk("--> nfs4_proc_destroy_session\n");
5810
5811 /* session is still being setup */
5812 if (session->clp->cl_cons_state != NFS_CS_READY)
5813 return status;
5814
1bd714f2 5815 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5816
5817 if (status)
08106ac7 5818 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5819 "Session has been destroyed regardless...\n", status);
5820
5821 dprintk("<-- nfs4_proc_destroy_session\n");
5822 return status;
5823}
5824
7b38c368
TM		 5825/*
5826 * With sessions, the client is not marked ready until after a
5827 * successful EXCHANGE_ID and CREATE_SESSION.
5828 *
5829 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5830 * other versions of NFS can be tried.
5831 */
5832static int nfs41_check_session_ready(struct nfs_client *clp)
5833{
5834 int ret;
5835
5836 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5837 ret = nfs4_client_recover_expired_lease(clp);
5838 if (ret)
5839 return ret;
5840 }
5841 if (clp->cl_cons_state < NFS_CS_READY)
5842 return -EPROTONOSUPPORT;
54ac471c 5843 smp_rmb();
7b38c368
TM		 5844 return 0;
5845}
5846
fccba804
TM		 5847int nfs4_init_session(struct nfs_server *server)
5848{
5849 struct nfs_client *clp = server->nfs_client;
2449ea2e 5850 struct nfs4_session *session;
68bf05ef 5851 unsigned int rsize, wsize;
fccba804
TM		 5852
5853 if (!nfs4_has_session(clp))
5854 return 0;
5855
1055d76d 5856 session = clp->cl_session;
7b38c368
TM		 5857 spin_lock(&clp->cl_lock);
5858 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5859
7b38c368
TM		 5860 rsize = server->rsize;
5861 if (rsize == 0)
5862 rsize = NFS_MAX_FILE_IO_SIZE;
5863 wsize = server->wsize;
5864 if (wsize == 0)
5865 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5866
7b38c368
TM		 5867 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5868 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5869 }
5870 spin_unlock(&clp->cl_lock);
2449ea2e 5871
7b38c368 5872 return nfs41_check_session_ready(clp);
fccba804
TM		 5873}
5874
7b38c368 5875int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5876{
5877 struct nfs4_session *session = clp->cl_session;
5878 int ret;
5879
7b38c368
TM		 5880 spin_lock(&clp->cl_lock);
5881 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5882 /*
5883 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5884 * DS lease to be equal to the MDS lease.
5885 */
5886 clp->cl_lease_time = lease_time;
5887 clp->cl_last_renewal = jiffies;
5888 }
5889 spin_unlock(&clp->cl_lock);
d83217c1 5890
7b38c368
TM		 5891 ret = nfs41_check_session_ready(clp);
5892 if (ret)
5893 return ret;
5894 /* Test for the DS role */
5895 if (!is_ds_client(clp))
5896 return -ENODEV;
5897 return 0;
d83217c1
AA		 5898}
5899EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5900
5901
fc01cea9
AA		 5902/*
5903 * Renew the cl_session lease.
5904 */
d5f8d3fe
TM		 5905struct nfs4_sequence_data {
5906 struct nfs_client *clp;
5907 struct nfs4_sequence_args args;
5908 struct nfs4_sequence_res res;
5909};
5910
dc96aef9
AB		 5911static void nfs41_sequence_release(void *data)
5912{
d5f8d3fe
TM		 5913 struct nfs4_sequence_data *calldata = data;
5914 struct nfs_client *clp = calldata->clp;
dc96aef9 5915
7135840f
AB		 5916 if (atomic_read(&clp->cl_count) > 1)
5917 nfs4_schedule_state_renewal(clp);
5918 nfs_put_client(clp);
d5f8d3fe 5919 kfree(calldata);
dc96aef9
AB		 5920}
5921
aa5190d0
TM		 5922static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5923{
5924 switch(task->tk_status) {
5925 case -NFS4ERR_DELAY:
aa5190d0
TM		 5926 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5927 return -EAGAIN;
5928 default:
0400a6b0 5929 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5930 }
5931 return 0;
5932}
5933
dc96aef9 5934static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5935{
d5f8d3fe
TM		 5936 struct nfs4_sequence_data *calldata = data;
5937 struct nfs_client *clp = calldata->clp;
fc01cea9 5938
14516c3a
TM		 5939 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5940 return;
fc01cea9
AA		 5941
5942 if (task->tk_status < 0) {
5943 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5944 if (atomic_read(&clp->cl_count) == 1)
5945 goto out;
fc01cea9 5946
aa5190d0
TM		 5947 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5948 rpc_restart_call_prepare(task);
fc01cea9
AA		 5949 return;
5950 }
5951 }
fc01cea9 5952 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5953out:
fc01cea9
AA		 5954 dprintk("<-- %s\n", __func__);
5955}
5956
5957static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5958{
d5f8d3fe
TM		 5959 struct nfs4_sequence_data *calldata = data;
5960 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5961 struct nfs4_sequence_args *args;
5962 struct nfs4_sequence_res *res;
5963
fc01cea9
AA		 5964 args = task->tk_msg.rpc_argp;
5965 res = task->tk_msg.rpc_resp;
5966
9d12b216 5967 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5968 return;
5969 rpc_call_start(task);
5970}
5971
5972static const struct rpc_call_ops nfs41_sequence_ops = {
5973 .rpc_call_done = nfs41_sequence_call_done,
5974 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5975 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5976};
5977
71ac6da9 5978static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5979{
d5f8d3fe 5980 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5981 struct rpc_message msg = {
5982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5983 .rpc_cred = cred,
5984 };
71ac6da9
TM		 5985 struct rpc_task_setup task_setup_data = {
5986 .rpc_client = clp->cl_rpcclient,
5987 .rpc_message = &msg,
5988 .callback_ops = &nfs41_sequence_ops,
5989 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5990 };
fc01cea9 5991
7135840f 5992 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5993 return ERR_PTR(-EIO);
dfb4f309 5994 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5995 if (calldata == NULL) {
7135840f 5996 nfs_put_client(clp);
71ac6da9 5997 return ERR_PTR(-ENOMEM);
fc01cea9 5998 }
9d12b216 5999 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6000 msg.rpc_argp = &calldata->args;
6001 msg.rpc_resp = &calldata->res;
6002 calldata->clp = clp;
71ac6da9 6003 task_setup_data.callback_data = calldata;
fc01cea9 6004
71ac6da9
TM		 6005 return rpc_run_task(&task_setup_data);
6006}
6007
2f60ea6b 6008static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6009{
6010 struct rpc_task *task;
6011 int ret = 0;
6012
2f60ea6b
TM		 6013 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6014 return 0;
71ac6da9
TM		 6015 task = _nfs41_proc_sequence(clp, cred);
6016 if (IS_ERR(task))
6017 ret = PTR_ERR(task);
6018 else
bf294b41 6019 rpc_put_task_async(task);
71ac6da9
TM		 6020 dprintk("<-- %s status=%d\n", __func__, ret);
6021 return ret;
6022}
6023
6024static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6025{
6026 struct rpc_task *task;
6027 int ret;
6028
6029 task = _nfs41_proc_sequence(clp, cred);
6030 if (IS_ERR(task)) {
6031 ret = PTR_ERR(task);
6032 goto out;
6033 }
6034 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6035 if (!ret) {
6036 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6037
6038 if (task->tk_status == 0)
6039 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6040 ret = task->tk_status;
b4410c2f 6041 }
71ac6da9
TM		 6042 rpc_put_task(task);
6043out:
6044 dprintk("<-- %s status=%d\n", __func__, ret);
6045 return ret;
fc01cea9
AA		 6046}
6047
fce5c838
RL		 6048struct nfs4_reclaim_complete_data {
6049 struct nfs_client *clp;
6050 struct nfs41_reclaim_complete_args arg;
6051 struct nfs41_reclaim_complete_res res;
6052};
6053
6054static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6055{
6056 struct nfs4_reclaim_complete_data *calldata = data;
6057
b257957e 6058 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6059 if (nfs41_setup_sequence(calldata->clp->cl_session,
6060 &calldata->arg.seq_args,
9d12b216 6061 &calldata->res.seq_res, task))
fce5c838
RL		 6062 return;
6063
6064 rpc_call_start(task);
6065}
6066
aa5190d0
TM		 6067static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6068{
6069 switch(task->tk_status) {
6070 case 0:
6071 case -NFS4ERR_COMPLETE_ALREADY:
6072 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6073 break;
6074 case -NFS4ERR_DELAY:
aa5190d0 6075 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6076 /* fall through */
6077 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6078 return -EAGAIN;
6079 default:
0400a6b0 6080 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6081 }
6082 return 0;
6083}
6084
fce5c838
RL		 6085static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6086{
6087 struct nfs4_reclaim_complete_data *calldata = data;
6088 struct nfs_client *clp = calldata->clp;
6089 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6090
6091 dprintk("--> %s\n", __func__);
14516c3a
TM		 6092 if (!nfs41_sequence_done(task, res))
6093 return;
fce5c838 6094
aa5190d0
TM		 6095 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6096 rpc_restart_call_prepare(task);
6097 return;
6098 }
fce5c838
RL		 6099 dprintk("<-- %s\n", __func__);
6100}
6101
6102static void nfs4_free_reclaim_complete_data(void *data)
6103{
6104 struct nfs4_reclaim_complete_data *calldata = data;
6105
6106 kfree(calldata);
6107}
6108
6109static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6110 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6111 .rpc_call_done = nfs4_reclaim_complete_done,
6112 .rpc_release = nfs4_free_reclaim_complete_data,
6113};
6114
6115/*
6116 * Issue a global reclaim complete.
6117 */
6118static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6119{
6120 struct nfs4_reclaim_complete_data *calldata;
6121 struct rpc_task *task;
6122 struct rpc_message msg = {
6123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6124 };
6125 struct rpc_task_setup task_setup_data = {
6126 .rpc_client = clp->cl_rpcclient,
6127 .rpc_message = &msg,
6128 .callback_ops = &nfs4_reclaim_complete_call_ops,
6129 .flags = RPC_TASK_ASYNC,
6130 };
6131 int status = -ENOMEM;
6132
6133 dprintk("--> %s\n", __func__);
8535b2be 6134 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6135 if (calldata == NULL)
6136 goto out;
6137 calldata->clp = clp;
6138 calldata->arg.one_fs = 0;
fce5c838 6139
9d12b216 6140 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6141 msg.rpc_argp = &calldata->arg;
6142 msg.rpc_resp = &calldata->res;
6143 task_setup_data.callback_data = calldata;
6144 task = rpc_run_task(&task_setup_data);
acf82b85 6145 if (IS_ERR(task)) {
fce5c838 6146 status = PTR_ERR(task);
acf82b85
DC		 6147 goto out;
6148 }
c34c32ea
AA		 6149 status = nfs4_wait_for_completion_rpc_task(task);
6150 if (status == 0)
6151 status = task->tk_status;
fce5c838 6152 rpc_put_task(task);
acf82b85 6153 return 0;
fce5c838
RL		 6154out:
6155 dprintk("<-- %s status=%d\n", __func__, status);
6156 return status;
6157}
b1f69b75
AA		 6158
6159static void
6160nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6161{
6162 struct nfs4_layoutget *lgp = calldata;
c31663d4 6163 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6164
6165 dprintk("--> %s\n", __func__);
c31663d4
FI		 6166 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6167 * right now covering the LAYOUTGET we are about to send.
6168 * However, that is not so catastrophic, and there seems
6169 * to be no way to prevent it completely.
6170 */
b1f69b75 6171 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6172 &lgp->res.seq_res, task))
b1f69b75 6173 return;
cf7d63f1
FI		 6174 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6175 NFS_I(lgp->args.inode)->layout,
6176 lgp->args.ctx->state)) {
6177 rpc_exit(task, NFS4_OK);
6178 return;
6179 }
b1f69b75
AA		 6180 rpc_call_start(task);
6181}
6182
6183static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6184{
6185 struct nfs4_layoutget *lgp = calldata;
6186 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6187
6188 dprintk("--> %s\n", __func__);
6189
6190 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6191 return;
6192
6193 switch (task->tk_status) {
6194 case 0:
6195 break;
6196 case -NFS4ERR_LAYOUTTRYLATER:
6197 case -NFS4ERR_RECALLCONFLICT:
6198 task->tk_status = -NFS4ERR_DELAY;
6199 /* Fall through */
6200 default:
6201 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6202 rpc_restart_call_prepare(task);
6203 return;
6204 }
6205 }
b1f69b75
AA		 6206 dprintk("<-- %s\n", __func__);
6207}
6208
6209static void nfs4_layoutget_release(void *calldata)
6210{
6211 struct nfs4_layoutget *lgp = calldata;
6212
6213 dprintk("--> %s\n", __func__);
b1f69b75
AA		 6214 put_nfs_open_context(lgp->args.ctx);
6215 kfree(calldata);
6216 dprintk("<-- %s\n", __func__);
6217}
6218
6219static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6220 .rpc_call_prepare = nfs4_layoutget_prepare,
6221 .rpc_call_done = nfs4_layoutget_done,
6222 .rpc_release = nfs4_layoutget_release,
6223};
6224
6225int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6226{
6227 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6228 struct rpc_task *task;
6229 struct rpc_message msg = {
6230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6231 .rpc_argp = &lgp->args,
6232 .rpc_resp = &lgp->res,
6233 };
6234 struct rpc_task_setup task_setup_data = {
6235 .rpc_client = server->client,
6236 .rpc_message = &msg,
6237 .callback_ops = &nfs4_layoutget_call_ops,
6238 .callback_data = lgp,
6239 .flags = RPC_TASK_ASYNC,
6240 };
6241 int status = 0;
6242
6243 dprintk("--> %s\n", __func__);
6244
35124a09 6245 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6246 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6247 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6248 task = rpc_run_task(&task_setup_data);
6249 if (IS_ERR(task))
6250 return PTR_ERR(task);
6251 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6252 if (status == 0)
6253 status = task->tk_status;
6254 if (status == 0)
6255 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6256 rpc_put_task(task);
6257 dprintk("<-- %s status=%d\n", __func__, status);
6258 return status;
6259}
6260
cbe82603
BH		 6261static void
6262nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6263{
6264 struct nfs4_layoutreturn *lrp = calldata;
6265
6266 dprintk("--> %s\n", __func__);
6267 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6268 &lrp->res.seq_res, task))
cbe82603
BH		 6269 return;
6270 rpc_call_start(task);
6271}
6272
6273static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6274{
6275 struct nfs4_layoutreturn *lrp = calldata;
6276 struct nfs_server *server;
a56aaa02 6277 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6278
6279 dprintk("--> %s\n", __func__);
6280
6281 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6282 return;
6283
6284 server = NFS_SERVER(lrp->args.inode);
6285 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6286 rpc_restart_call_prepare(task);
cbe82603
BH		 6287 return;
6288 }
a2e1d4f2 6289 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6290 if (task->tk_status == 0) {
cbe82603 6291 if (lrp->res.lrs_present) {
cbe82603 6292 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6293 } else
6294 BUG_ON(!list_empty(&lo->plh_segs));
6295 }
a2e1d4f2
FI		 6296 lo->plh_block_lgets--;
6297 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6298 dprintk("<-- %s\n", __func__);
6299}
6300
6301static void nfs4_layoutreturn_release(void *calldata)
6302{
6303 struct nfs4_layoutreturn *lrp = calldata;
6304
6305 dprintk("--> %s\n", __func__);
a56aaa02 6306 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6307 kfree(calldata);
6308 dprintk("<-- %s\n", __func__);
6309}
6310
6311static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6312 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6313 .rpc_call_done = nfs4_layoutreturn_done,
6314 .rpc_release = nfs4_layoutreturn_release,
6315};
6316
6317int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6318{
6319 struct rpc_task *task;
6320 struct rpc_message msg = {
6321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6322 .rpc_argp = &lrp->args,
6323 .rpc_resp = &lrp->res,
6324 };
6325 struct rpc_task_setup task_setup_data = {
6326 .rpc_client = lrp->clp->cl_rpcclient,
6327 .rpc_message = &msg,
6328 .callback_ops = &nfs4_layoutreturn_call_ops,
6329 .callback_data = lrp,
6330 };
6331 int status;
6332
6333 dprintk("--> %s\n", __func__);
9d12b216 6334 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6335 task = rpc_run_task(&task_setup_data);
6336 if (IS_ERR(task))
6337 return PTR_ERR(task);
6338 status = task->tk_status;
6339 dprintk("<-- %s status=%d\n", __func__, status);
6340 rpc_put_task(task);
6341 return status;
6342}
6343
7f11d8d3
AA		 6344/*
6345 * Retrieve the list of Data Server devices from the MDS.
6346 */
6347static int _nfs4_getdevicelist(struct nfs_server *server,
6348 const struct nfs_fh *fh,
6349 struct pnfs_devicelist *devlist)
6350{
6351 struct nfs4_getdevicelist_args args = {
6352 .fh = fh,
6353 .layoutclass = server->pnfs_curr_ld->id,
6354 };
6355 struct nfs4_getdevicelist_res res = {
6356 .devlist = devlist,
6357 };
6358 struct rpc_message msg = {
6359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6360 .rpc_argp = &args,
6361 .rpc_resp = &res,
6362 };
6363 int status;
6364
6365 dprintk("--> %s\n", __func__);
6366 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6367 &res.seq_res, 0);
6368 dprintk("<-- %s status=%d\n", __func__, status);
6369 return status;
6370}
6371
6372int nfs4_proc_getdevicelist(struct nfs_server *server,
6373 const struct nfs_fh *fh,
6374 struct pnfs_devicelist *devlist)
6375{
6376 struct nfs4_exception exception = { };
6377 int err;
6378
6379 do {
6380 err = nfs4_handle_exception(server,
6381 _nfs4_getdevicelist(server, fh, devlist),
6382 &exception);
6383 } while (exception.retry);
6384
6385 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6386 err, devlist->num_devs);
6387
6388 return err;
6389}
6390EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6391
b1f69b75
AA		 6392static int
6393_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6394{
6395 struct nfs4_getdeviceinfo_args args = {
6396 .pdev = pdev,
6397 };
6398 struct nfs4_getdeviceinfo_res res = {
6399 .pdev = pdev,
6400 };
6401 struct rpc_message msg = {
6402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6403 .rpc_argp = &args,
6404 .rpc_resp = &res,
6405 };
6406 int status;
6407
6408 dprintk("--> %s\n", __func__);
7c513058 6409 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6410 dprintk("<-- %s status=%d\n", __func__, status);
6411
6412 return status;
6413}
6414
6415int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6416{
6417 struct nfs4_exception exception = { };
6418 int err;
6419
6420 do {
6421 err = nfs4_handle_exception(server,
6422 _nfs4_proc_getdeviceinfo(server, pdev),
6423 &exception);
6424 } while (exception.retry);
6425 return err;
6426}
6427EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6428
863a3c6c
AA		 6429static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6430{
6431 struct nfs4_layoutcommit_data *data = calldata;
6432 struct nfs_server *server = NFS_SERVER(data->args.inode);
6433
6434 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6435 &data->res.seq_res, task))
863a3c6c
AA		 6436 return;
6437 rpc_call_start(task);
6438}
6439
6440static void
6441nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6442{
6443 struct nfs4_layoutcommit_data *data = calldata;
6444 struct nfs_server *server = NFS_SERVER(data->args.inode);
6445
6446 if (!nfs4_sequence_done(task, &data->res.seq_res))
6447 return;
6448
6449 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6450 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6451 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6452 case -NFS4ERR_BADLAYOUT: /* no layout */
6453 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6454 task->tk_status = 0;
e59d27e0
TM		 6455 break;
6456 case 0:
863a3c6c
AA		 6457 nfs_post_op_update_inode_force_wcc(data->args.inode,
6458 data->res.fattr);
e59d27e0
TM		 6459 break;
6460 default:
6461 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6462 rpc_restart_call_prepare(task);
6463 return;
6464 }
6465 }
863a3c6c
AA		 6466}
6467
6468static void nfs4_layoutcommit_release(void *calldata)
6469{
6470 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6471 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6472 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6473
db29c089 6474 pnfs_cleanup_layoutcommit(data);
863a3c6c 6475 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6476 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6477 list_del_init(&lseg->pls_lc_list);
6478 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6479 &lseg->pls_flags))
6480 put_lseg(lseg);
6481 }
92407e75
PT		 6482
6483 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6484 smp_mb__after_clear_bit();
6485 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6486
863a3c6c
AA		 6487 put_rpccred(data->cred);
6488 kfree(data);
6489}
6490
6491static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6492 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6493 .rpc_call_done = nfs4_layoutcommit_done,
6494 .rpc_release = nfs4_layoutcommit_release,
6495};
6496
6497int
ef311537 6498nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6499{
6500 struct rpc_message msg = {
6501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6502 .rpc_argp = &data->args,
6503 .rpc_resp = &data->res,
6504 .rpc_cred = data->cred,
6505 };
6506 struct rpc_task_setup task_setup_data = {
6507 .task = &data->task,
6508 .rpc_client = NFS_CLIENT(data->args.inode),
6509 .rpc_message = &msg,
6510 .callback_ops = &nfs4_layoutcommit_ops,
6511 .callback_data = data,
6512 .flags = RPC_TASK_ASYNC,
6513 };
6514 struct rpc_task *task;
6515 int status = 0;
6516
6517 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6518 "lbw: %llu inode %lu\n",
6519 data->task.tk_pid, sync,
6520 data->args.lastbytewritten,
6521 data->args.inode->i_ino);
6522
9d12b216 6523 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6524 task = rpc_run_task(&task_setup_data);
6525 if (IS_ERR(task))
6526 return PTR_ERR(task);
ef311537 6527 if (sync == false)
863a3c6c
AA		 6528 goto out;
6529 status = nfs4_wait_for_completion_rpc_task(task);
6530 if (status != 0)
6531 goto out;
6532 status = task->tk_status;
6533out:
6534 dprintk("%s: status %d\n", __func__, status);
6535 rpc_put_task(task);
6536 return status;
6537}
fca78d6d
BS		 6538
6539static int
6540_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6541 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6542{
6543 struct nfs41_secinfo_no_name_args args = {
6544 .style = SECINFO_STYLE_CURRENT_FH,
6545 };
6546 struct nfs4_secinfo_res res = {
6547 .flavors = flavors,
6548 };
6549 struct rpc_message msg = {
6550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6551 .rpc_argp = &args,
6552 .rpc_resp = &res,
6553 };
6554 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6555}
6556
6557static int
6558nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6559 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6560{
6561 struct nfs4_exception exception = { };
6562 int err;
6563 do {
6564 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6565 switch (err) {
6566 case 0:
6567 case -NFS4ERR_WRONGSEC:
6568 case -NFS4ERR_NOTSUPP:
05e9cfb4 6569 goto out;
fca78d6d
BS		 6570 default:
6571 err = nfs4_handle_exception(server, err, &exception);
6572 }
6573 } while (exception.retry);
05e9cfb4 6574out:
fca78d6d
BS		 6575 return err;
6576}
6577
6578static int
6579nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6580 struct nfs_fsinfo *info)
6581{
6582 int err;
6583 struct page *page;
6584 rpc_authflavor_t flavor;
6585 struct nfs4_secinfo_flavors *flavors;
6586
6587 page = alloc_page(GFP_KERNEL);
6588 if (!page) {
6589 err = -ENOMEM;
6590 goto out;
6591 }
6592
6593 flavors = page_address(page);
6594 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6595
6596 /*
6597 * Fall back on "guess and check" method if
6598 * the server doesn't support SECINFO_NO_NAME
6599 */
6600 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6601 err = nfs4_find_root_sec(server, fhandle, info);
6602 goto out_freepage;
6603 }
6604 if (err)
6605 goto out_freepage;
6606
6607 flavor = nfs_find_best_sec(flavors);
6608 if (err == 0)
6609 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6610
6611out_freepage:
6612 put_page(page);
6613 if (err == -EACCES)
6614 return -EPERM;
6615out:
6616 return err;
6617}
1cab0652
BS		 6618
6619static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6620{
6621 int status;
6622 struct nfs41_test_stateid_args args = {
1cab0652 6623 .stateid = stateid,
7d974794
BS		 6624 };
6625 struct nfs41_test_stateid_res res;
6626 struct rpc_message msg = {
6627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6628 .rpc_argp = &args,
6629 .rpc_resp = &res,
6630 };
1cab0652 6631
38527b15 6632 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6633 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6634 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6635 if (status != NFS_OK) {
6636 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6637 return status;
38527b15
CL		 6638 }
6639 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6640 return -res.status;
7d974794
BS		 6641}
6642
38527b15
CL		 6643/**
6644 * nfs41_test_stateid - perform a TEST_STATEID operation
6645 *
6646 * @server: server / transport on which to perform the operation
6647 * @stateid: state ID to test
6648 *
6649 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6650 * Otherwise a negative NFS4ERR value is returned if the operation
6651 * failed or the state ID is not currently valid.
6652 */
1cab0652 6653static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6654{
6655 struct nfs4_exception exception = { };
6656 int err;
6657 do {
377e507d
CL		 6658 err = _nfs41_test_stateid(server, stateid);
6659 if (err != -NFS4ERR_DELAY)
6660 break;
6661 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6662 } while (exception.retry);
6663 return err;
6664}
9aeda35f 6665
1cab0652 6666static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6667{
9aeda35f 6668 struct nfs41_free_stateid_args args = {
1cab0652 6669 .stateid = stateid,
9aeda35f
BS		 6670 };
6671 struct nfs41_free_stateid_res res;
6672 struct rpc_message msg = {
6673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6674 .rpc_argp = &args,
6675 .rpc_resp = &res,
6676 };
38527b15 6677 int status;
9aeda35f 6678
38527b15 6679 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6680 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6681 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6682 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6683 dprintk("NFS reply free_stateid: %d\n", status);
6684 return status;
9aeda35f
BS		 6685}
6686
38527b15
CL		 6687/**
6688 * nfs41_free_stateid - perform a FREE_STATEID operation
6689 *
6690 * @server: server / transport on which to perform the operation
6691 * @stateid: state ID to release
6692 *
6693 * Returns NFS_OK if the server freed "stateid". Otherwise a
6694 * negative NFS4ERR value is returned.
6695 */
1cab0652 6696static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6697{
6698 struct nfs4_exception exception = { };
6699 int err;
6700 do {
377e507d
CL		 6701 err = _nfs4_free_stateid(server, stateid);
6702 if (err != -NFS4ERR_DELAY)
6703 break;
6704 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6705 } while (exception.retry);
6706 return err;
6707}
36281caa
TM		 6708
6709static bool nfs41_match_stateid(const nfs4_stateid *s1,
6710 const nfs4_stateid *s2)
6711{
2d2f24ad 6712 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6713 return false;
6714
2d2f24ad 6715 if (s1->seqid == s2->seqid)
36281caa 6716 return true;
2d2f24ad 6717 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6718 return true;
6719
6720 return false;
6721}
6722
557134a3
AA		 6723#endif /* CONFIG_NFS_V4_1 */
6724
36281caa
TM		 6725static bool nfs4_match_stateid(const nfs4_stateid *s1,
6726 const nfs4_stateid *s2)
6727{
f597c537 6728 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6729}
6730
6731
17280175 6732static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6733 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6734 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6735 .recover_open = nfs4_open_reclaim,
6736 .recover_lock = nfs4_lock_reclaim,
591d71cb 6737 .establish_clid = nfs4_init_clientid,
90a16617 6738 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6739};
6740
591d71cb 6741#if defined(CONFIG_NFS_V4_1)
17280175 6742static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6743 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6744 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6745 .recover_open = nfs4_open_reclaim,
6746 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6747 .establish_clid = nfs41_init_clientid,
b4b82607 6748 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6749 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6750};
6751#endif /* CONFIG_NFS_V4_1 */
6752
17280175 6753static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6754 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6755 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6756 .recover_open = nfs4_open_expired,
6757 .recover_lock = nfs4_lock_expired,
6758 .establish_clid = nfs4_init_clientid,
90a16617 6759 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6760};
6761
6762#if defined(CONFIG_NFS_V4_1)
17280175 6763static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6764 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6765 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6766 .recover_open = nfs41_open_expired,
6767 .recover_lock = nfs41_lock_expired,
4d643d1d 6768 .establish_clid = nfs41_init_clientid,
b4b82607 6769 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6770};
591d71cb 6771#endif /* CONFIG_NFS_V4_1 */
1da177e4 6772
17280175 6773static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6774 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6775 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6776 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6777};
6778
6779#if defined(CONFIG_NFS_V4_1)
17280175 6780static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6781 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6782 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6783 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6784};
6785#endif
6786
97dc1359
TM		 6787static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6788 .minor_version = 0,
6789 .call_sync = _nfs4_call_sync,
36281caa 6790 .match_stateid = nfs4_match_stateid,
fca78d6d 6791 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6792 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6793 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6794 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6795};
6796
6797#if defined(CONFIG_NFS_V4_1)
6798static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6799 .minor_version = 1,
6800 .call_sync = _nfs4_call_sync_session,
36281caa 6801 .match_stateid = nfs41_match_stateid,
fca78d6d 6802 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6803 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6804 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6805 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6806};
6807#endif
6808
97dc1359
TM		 6809const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6810 [0] = &nfs_v4_0_minor_ops,
6811#if defined(CONFIG_NFS_V4_1)
6812 [1] = &nfs_v4_1_minor_ops,
6813#endif
6814};
6815
92e1d5be 6816static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6817 .permission = nfs_permission,
6818 .getattr = nfs_getattr,
6819 .setattr = nfs_setattr,
64c2ce8b
AK		 6820 .getxattr = generic_getxattr,
6821 .setxattr = generic_setxattr,
6822 .listxattr = generic_listxattr,
6823 .removexattr = generic_removexattr,
6b3b5496
BF		 6824};
6825
509de811 6826const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6827 .version = 4, /* protocol version */
6828 .dentry_ops = &nfs4_dentry_operations,
6829 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6830 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6831 .file_ops = &nfs4_file_operations,
1da177e4 6832 .getroot = nfs4_proc_get_root,
281cad46 6833 .submount = nfs4_submount,
1da177e4
LT		 6834 .getattr = nfs4_proc_getattr,
6835 .setattr = nfs4_proc_setattr,
6836 .lookup = nfs4_proc_lookup,
6837 .access = nfs4_proc_access,
6838 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6839 .create = nfs4_proc_create,
6840 .remove = nfs4_proc_remove,
6841 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6842 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6843 .unlink_done = nfs4_proc_unlink_done,
6844 .rename = nfs4_proc_rename,
d3d4152a 6845 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6846 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6847 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6848 .link = nfs4_proc_link,
6849 .symlink = nfs4_proc_symlink,
6850 .mkdir = nfs4_proc_mkdir,
6851 .rmdir = nfs4_proc_remove,
6852 .readdir = nfs4_proc_readdir,
6853 .mknod = nfs4_proc_mknod,
6854 .statfs = nfs4_proc_statfs,
6855 .fsinfo = nfs4_proc_fsinfo,
6856 .pathconf = nfs4_proc_pathconf,
e9326dca 6857 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6858 .decode_dirent = nfs4_decode_dirent,
6859 .read_setup = nfs4_proc_read_setup,
1abb5088 6860 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6861 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6862 .read_done = nfs4_read_done,
1da177e4 6863 .write_setup = nfs4_proc_write_setup,
57208fa7 6864 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6865 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6866 .write_done = nfs4_write_done,
1da177e4 6867 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6868 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6869 .commit_done = nfs4_commit_done,
1da177e4 6870 .lock = nfs4_proc_lock,
e50a1c2e 6871 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6872 .close_context = nfs4_close_context,
2b484297 6873 .open_context = nfs4_atomic_open,
011e2a7f 6874 .have_delegation = nfs4_have_delegation,
57ec14c5 6875 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6876 .alloc_client = nfs4_alloc_client,
45a52a02 6877 .init_client = nfs4_init_client,
cdb7eced 6878 .free_client = nfs4_free_client,
1da177e4
LT		 6879};
6880
64c2ce8b
AK		 6881static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6882 .prefix = XATTR_NAME_NFSV4_ACL,
6883 .list = nfs4_xattr_list_nfs4_acl,
6884 .get = nfs4_xattr_get_nfs4_acl,
6885 .set = nfs4_xattr_set_nfs4_acl,
6886};
6887
6888const struct xattr_handler *nfs4_xattr_handlers[] = {
6889 &nfs4_xattr_nfs4_acl_handler,
6890 NULL
6891};
6892
ef159e91
TM		 6893module_param(max_session_slots, ushort, 0644);
6894MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6895 "requests the client will negotiate");
6896
1da177e4
LT		 6897/*
6898 * Local variables:
6899 * c-basic-offset: 8
6900 * End:
6901 */
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