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NFS: Introduce "migration" mount option
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
6168f62c
WAA		 107 case -NFS4ERR_ACCESS:
108 return -EACCES;
52567b03 109 default:
1da177e4 110 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 111 __func__, -err);
52567b03 112 break;
1da177e4 113 }
52567b03 114 return -EIO;
1da177e4
LT		 115}
116
117/*
118 * This is our standard bitmap for GETATTR requests.
119 */
1549210f 120const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 121 FATTR4_WORD0_TYPE
122 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_SIZE
124 | FATTR4_WORD0_FSID
125 | FATTR4_WORD0_FILEID,
126 FATTR4_WORD1_MODE
127 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
135};
136
1549210f
TM		 137static const u32 nfs4_pnfs_open_bitmap[3] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID,
143 FATTR4_WORD1_MODE
144 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
153};
154
1da177e4
LT		 155const u32 nfs4_statfs_bitmap[2] = {
156 FATTR4_WORD0_FILES_AVAIL
157 | FATTR4_WORD0_FILES_FREE
158 | FATTR4_WORD0_FILES_TOTAL,
159 FATTR4_WORD1_SPACE_AVAIL
160 | FATTR4_WORD1_SPACE_FREE
161 | FATTR4_WORD1_SPACE_TOTAL
162};
163
4ce79717 164const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 165 FATTR4_WORD0_MAXLINK
166 | FATTR4_WORD0_MAXNAME,
167 0
168};
169
dae100c2 170const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 171 | FATTR4_WORD0_MAXREAD
172 | FATTR4_WORD0_MAXWRITE
173 | FATTR4_WORD0_LEASE_TIME,
55b6e774 174 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 175 | FATTR4_WORD1_FS_LAYOUT_TYPES,
176 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 177};
178
830b8e33
MN		 179const u32 nfs4_fs_locations_bitmap[2] = {
180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID
185 | FATTR4_WORD0_FS_LOCATIONS,
186 FATTR4_WORD1_MODE
187 | FATTR4_WORD1_NUMLINKS
188 | FATTR4_WORD1_OWNER
189 | FATTR4_WORD1_OWNER_GROUP
190 | FATTR4_WORD1_RAWDEV
191 | FATTR4_WORD1_SPACE_USED
192 | FATTR4_WORD1_TIME_ACCESS
193 | FATTR4_WORD1_TIME_METADATA
194 | FATTR4_WORD1_TIME_MODIFY
195 | FATTR4_WORD1_MOUNTED_ON_FILEID
196};
197
bc4785cd 198static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 199 struct nfs4_readdir_arg *readdir)
200{
0dbb4c67 201 __be32 *start, *p;
1da177e4
LT		 202
203 BUG_ON(readdir->count < 80);
204 if (cookie > 2) {
b7ef1956 205 readdir->cookie = cookie;
1da177e4
LT		 206 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
207 return;
208 }
209
210 readdir->cookie = 0;
211 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
212 if (cookie == 2)
213 return;
214
215 /*
216 * NFSv4 servers do not return entries for '.' and '..'
217 * Therefore, we fake these entries here. We let '.'
218 * have cookie 0 and '..' have cookie 1. Note that
219 * when talking to the server, we always send cookie 0
220 * instead of 1 or 2.
221 */
2b86ce2d 222 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 223
224 if (cookie == 0) {
225 *p++ = xdr_one; /* next */
226 *p++ = xdr_zero; /* cookie, first word */
227 *p++ = xdr_one; /* cookie, second word */
228 *p++ = xdr_one; /* entry len */
229 memcpy(p, ".\0\0\0", 4); /* entry */
230 p++;
231 *p++ = xdr_one; /* bitmap length */
232 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
233 *p++ = htonl(8); /* attribute buffer length */
4e769b93 234 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 235 }
236
237 *p++ = xdr_one; /* next */
238 *p++ = xdr_zero; /* cookie, first word */
239 *p++ = xdr_two; /* cookie, second word */
240 *p++ = xdr_two; /* entry len */
241 memcpy(p, "..\0\0", 4); /* entry */
242 p++;
243 *p++ = xdr_one; /* bitmap length */
244 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
245 *p++ = htonl(8); /* attribute buffer length */
4e769b93 246 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 247
248 readdir->pgbase = (char *)p - (char *)start;
249 readdir->count -= readdir->pgbase;
2b86ce2d 250 kunmap_atomic(start);
1da177e4
LT		 251}
252
65de872e
TM		 253static int nfs4_wait_clnt_recover(struct nfs_client *clp)
254{
255 int res;
256
257 might_sleep();
258
e005e804 259 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 260 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 261 if (res)
262 return res;
263
264 if (clp->cl_cons_state < 0)
265 return clp->cl_cons_state;
266 return 0;
65de872e
TM		 267}
268
269static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
270{
271 int res = 0;
272
273 might_sleep();
274
275 if (*timeout <= 0)
276 *timeout = NFS4_POLL_RETRY_MIN;
277 if (*timeout > NFS4_POLL_RETRY_MAX)
278 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 279 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 280 if (fatal_signal_pending(current))
281 res = -ERESTARTSYS;
282 *timeout <<= 1;
283 return res;
284}
285
286/* This is the error handling routine for processes that are allowed
287 * to sleep.
288 */
b064eca2 289static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 290{
291 struct nfs_client *clp = server->nfs_client;
9e33bed5 292 struct nfs4_state *state = exception->state;
3114ea7a 293 struct inode *inode = exception->inode;
65de872e
TM		 294 int ret = errorcode;
295
296 exception->retry = 0;
297 switch(errorcode) {
298 case 0:
299 return 0;
3114ea7a 300 case -NFS4ERR_OPENMODE:
011e2a7f 301 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 302 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 303 exception->retry = 1;
304 return 0;
305 }
306 if (state == NULL)
307 break;
308 nfs4_schedule_stateid_recovery(server, state);
309 goto wait_on_recovery;
a1d0b5ee 310 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 311 case -NFS4ERR_ADMIN_REVOKED:
312 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 313 if (state == NULL)
314 break;
14977489 315 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 316 nfs4_schedule_stateid_recovery(server, state);
317 goto wait_on_recovery;
0ced63d1
TM		 318 case -NFS4ERR_EXPIRED:
319 if (state != NULL)
320 nfs4_schedule_stateid_recovery(server, state);
65de872e 321 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 322 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 323 nfs4_schedule_lease_recovery(clp);
324 goto wait_on_recovery;
03391693 325#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 326 case -NFS4ERR_BADSESSION:
327 case -NFS4ERR_BADSLOT:
328 case -NFS4ERR_BAD_HIGH_SLOT:
329 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
330 case -NFS4ERR_DEADSESSION:
331 case -NFS4ERR_SEQ_FALSE_RETRY:
332 case -NFS4ERR_SEQ_MISORDERED:
333 dprintk("%s ERROR: %d Reset session\n", __func__,
334 errorcode);
9f594791 335 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 336 exception->retry = 1;
b9179237 337 break;
03391693 338#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 339 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 340 if (exception->timeout > HZ) {
341 /* We have retried a decent amount, time to
342 * fail
343 */
344 ret = -EBUSY;
345 break;
346 }
65de872e
TM		 347 case -NFS4ERR_GRACE:
348 case -NFS4ERR_DELAY:
2c643488 349 case -EKEYEXPIRED:
65de872e
TM		 350 ret = nfs4_delay(server->client, &exception->timeout);
351 if (ret != 0)
352 break;
a8a4ae3a 353 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 354 case -NFS4ERR_OLD_STATEID:
355 exception->retry = 1;
b064eca2
TM		 356 break;
357 case -NFS4ERR_BADOWNER:
358 /* The following works around a Linux server bug! */
359 case -NFS4ERR_BADNAME:
360 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
361 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
362 exception->retry = 1;
363 printk(KERN_WARNING "NFS: v4 server %s "
364 "does not accept raw "
365 "uid/gids. "
366 "Reenabling the idmapper.\n",
367 server->nfs_client->cl_hostname);
368 }
65de872e
TM		 369 }
370 /* We failed to handle the error */
371 return nfs4_map_errors(ret);
0400a6b0 372wait_on_recovery:
a2c0b9e2
TM		 373 ret = nfs4_wait_clnt_recover(clp);
374 if (ret == 0)
375 exception->retry = 1;
376 return ret;
65de872e
TM		 377}
378
379
452e9352 380static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 381{
1da177e4
LT		 382 spin_lock(&clp->cl_lock);
383 if (time_before(clp->cl_last_renewal,timestamp))
384 clp->cl_last_renewal = timestamp;
385 spin_unlock(&clp->cl_lock);
386}
387
452e9352
TM		 388static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
389{
390 do_renew_lease(server->nfs_client, timestamp);
391}
392
cccef3b9
AA		 393#if defined(CONFIG_NFS_V4_1)
394
e2c4ab3c
AA		 395/*
396 * nfs4_free_slot - free a slot and efficiently update slot table.
397 *
398 * freeing a slot is trivially done by clearing its respective bit
399 * in the bitmap.
400 * If the freed slotid equals highest_used_slotid we want to update it
401 * so that the server would be able to size down the slot table if needed,
402 * otherwise we know that the highest_used_slotid is still in use.
403 * When updating highest_used_slotid there may be "holes" in the bitmap
404 * so we need to scan down from highest_used_slotid to 0 looking for the now
405 * highest slotid in use.
45d43c29 406 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 407 *
408 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 409 */
410static void
45d43c29 411nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 412{
45d43c29 413 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 414 /* clear used bit in bitmap */
415 __clear_bit(slotid, tbl->used_slots);
416
417 /* update highest_used_slotid when it is freed */
418 if (slotid == tbl->highest_used_slotid) {
419 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 420 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 421 tbl->highest_used_slotid = slotid;
422 else
45d43c29 423 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 424 }
45d43c29
TM		 425 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
426 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 427}
428
961a828d
TM		 429bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
430{
431 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
432 return true;
e2c4ab3c
AA		 433}
434
3bfb0fc5 435/*
42acd021 436 * Signal state manager thread if session fore channel is drained
3bfb0fc5 437 */
42acd021 438static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 439{
a2118c33 440 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 441 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
442 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 443 return;
444 }
445
45d43c29 446 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 447 return;
448
42acd021
AA		 449 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
450 complete(&ses->fc_slot_table.complete);
451}
452
453/*
454 * Signal state manager thread if session back channel is drained
455 */
456void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
457{
458 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 459 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 460 return;
461 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
462 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 463}
464
d185a334 465static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 466{
467 struct nfs4_slot_table *tbl;
468
d185a334 469 tbl = &res->sr_session->fc_slot_table;
dfb4f309 470 if (!res->sr_slot) {
13615871
AA		 471 /* just wake up the next guy waiting since
472 * we may have not consumed a slot after all */
691daf3b 473 dprintk("%s: No slot\n", __func__);
35dc1d74 474 return;
13615871 475 }
ea028ac9 476
35dc1d74 477 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 478 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 479 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 480 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 481 res->sr_slot = NULL;
13615871
AA		 482}
483
14516c3a 484static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 485{
486 unsigned long timestamp;
14516c3a 487 struct nfs_client *clp;
b0df806c
AA		 488
489 /*
490 * sr_status remains 1 if an RPC level error occurred. The server
491 * may or may not have processed the sequence operation..
492 * Proceed as if the server received and processed the sequence
493 * operation.
494 */
495 if (res->sr_status == 1)
496 res->sr_status = NFS_OK;
497
468f8613
BS		 498 /* don't increment the sequence number if the task wasn't sent */
499 if (!RPC_WAS_SENT(task))
b0df806c
AA		 500 goto out;
501
691daf3b 502 /* Check the SEQUENCE operation status */
14516c3a
TM		 503 switch (res->sr_status) {
504 case 0:
b0df806c 505 /* Update the slot's sequence and clientid lease timer */
dfb4f309 506 ++res->sr_slot->seq_nr;
b0df806c 507 timestamp = res->sr_renewal_time;
14516c3a 508 clp = res->sr_session->clp;
452e9352 509 do_renew_lease(clp, timestamp);
0629e370 510 /* Check sequence flags */
b4410c2f
TM		 511 if (res->sr_status_flags != 0)
512 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 513 break;
514 case -NFS4ERR_DELAY:
515 /* The server detected a resend of the RPC call and
516 * returned NFS4ERR_DELAY as per Section 2.10.6.2
517 * of RFC5661.
518 */
12364a4f 519 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 520 __func__,
521 res->sr_slot - res->sr_session->fc_slot_table.slots,
522 res->sr_slot->seq_nr);
14516c3a
TM		 523 goto out_retry;
524 default:
525 /* Just update the slot sequence no. */
dfb4f309 526 ++res->sr_slot->seq_nr;
b0df806c
AA		 527 }
528out:
529 /* The session may be reset by one of the error handlers. */
530 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 531 nfs41_sequence_free_slot(res);
14516c3a
TM		 532 return 1;
533out_retry:
d05dd4e9 534 if (!rpc_restart_call(task))
14516c3a
TM		 535 goto out;
536 rpc_delay(task, NFS4_POLL_RETRY_MAX);
537 return 0;
b0df806c
AA		 538}
539
14516c3a
TM		 540static int nfs4_sequence_done(struct rpc_task *task,
541 struct nfs4_sequence_res *res)
df896455 542{
14516c3a
TM		 543 if (res->sr_session == NULL)
544 return 1;
545 return nfs41_sequence_done(task, res);
df896455
TM		 546}
547
510b8175
BH		 548/*
549 * nfs4_find_slot - efficiently look for a free slot
550 *
551 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
552 * If found, we mark the slot as used, update the highest_used_slotid,
553 * and respectively set up the sequence operation args.
45d43c29 554 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 555 *
556 * Note: must be called with under the slot_tbl_lock.
510b8175 557 */
45d43c29 558static u32
40ead580 559nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 560{
45d43c29
TM		 561 u32 slotid;
562 u32 ret_id = NFS4_NO_SLOT;
510b8175 563
45d43c29 564 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 565 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
566 tbl->max_slots);
567 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
568 if (slotid >= tbl->max_slots)
569 goto out;
570 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 571 if (slotid > tbl->highest_used_slotid ||
572 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 573 tbl->highest_used_slotid = slotid;
574 ret_id = slotid;
575out:
576 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
577 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 578 return ret_id;
579}
580
9d12b216
TM		 581static void nfs41_init_sequence(struct nfs4_sequence_args *args,
582 struct nfs4_sequence_res *res, int cache_reply)
583{
584 args->sa_session = NULL;
585 args->sa_cache_this = 0;
586 if (cache_reply)
587 args->sa_cache_this = 1;
588 res->sr_session = NULL;
589 res->sr_slot = NULL;
590}
591
dc70d7b3 592int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 593 struct nfs4_sequence_args *args,
594 struct nfs4_sequence_res *res,
ce5039c1
AA		 595 struct rpc_task *task)
596{
fbcd4abc
AA		 597 struct nfs4_slot *slot;
598 struct nfs4_slot_table *tbl;
45d43c29 599 u32 slotid;
fbcd4abc
AA		 600
601 dprintk("--> %s\n", __func__);
ce5039c1 602 /* slot already allocated? */
dfb4f309 603 if (res->sr_slot != NULL)
ce5039c1
AA		 604 return 0;
605
fbcd4abc
AA		 606 tbl = &session->fc_slot_table;
607
608 spin_lock(&tbl->slot_tbl_lock);
a2118c33 609 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 610 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 611 /* The state manager will wait until the slot table is empty */
05f0d236 612 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 613 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 614 dprintk("%s session is draining\n", __func__);
05f0d236 615 return -EAGAIN;
b069d94a
AA		 616 }
617
689cf5c1
AB		 618 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
619 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
620 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
621 spin_unlock(&tbl->slot_tbl_lock);
622 dprintk("%s enforce FIFO order\n", __func__);
623 return -EAGAIN;
624 }
625
40ead580 626 slotid = nfs4_find_slot(tbl);
45d43c29 627 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 628 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
629 spin_unlock(&tbl->slot_tbl_lock);
630 dprintk("<-- %s: no free slots\n", __func__);
631 return -EAGAIN;
632 }
633 spin_unlock(&tbl->slot_tbl_lock);
634
689cf5c1 635 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 636 slot = tbl->slots + slotid;
99fe60d0 637 args->sa_session = session;
fbcd4abc 638 args->sa_slotid = slotid;
fbcd4abc
AA		 639
640 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
641
99fe60d0 642 res->sr_session = session;
dfb4f309 643 res->sr_slot = slot;
fbcd4abc 644 res->sr_renewal_time = jiffies;
2a6e26cd 645 res->sr_status_flags = 0;
fbcd4abc
AA		 646 /*
647 * sr_status is only set in decode_sequence, and so will remain
648 * set to 1 if an rpc level failure occurs.
649 */
650 res->sr_status = 1;
ce5039c1
AA		 651 return 0;
652}
dc70d7b3 653EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 654
035168ab 655int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 656 struct nfs4_sequence_args *args,
657 struct nfs4_sequence_res *res,
ce5039c1
AA		 658 struct rpc_task *task)
659{
035168ab 660 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 661 int ret = 0;
662
9d12b216 663 if (session == NULL)
035168ab 664 goto out;
035168ab 665
12364a4f 666 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 667 __func__, session->clp, session, res->sr_slot ?
668 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 669
9d12b216 670 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 671out:
672 dprintk("<-- %s status=%d\n", __func__, ret);
673 return ret;
674}
675
676struct nfs41_call_sync_data {
035168ab 677 const struct nfs_server *seq_server;
ce5039c1
AA		 678 struct nfs4_sequence_args *seq_args;
679 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 680};
681
682static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
683{
684 struct nfs41_call_sync_data *data = calldata;
685
035168ab
TM		 686 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
687
688 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 689 data->seq_res, task))
ce5039c1
AA		 690 return;
691 rpc_call_start(task);
692}
693
b257957e
AB		 694static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
695{
696 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
697 nfs41_call_sync_prepare(task, calldata);
698}
699
69ab40c4
AA		 700static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
701{
702 struct nfs41_call_sync_data *data = calldata;
703
14516c3a 704 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 705}
706
17280175 707static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 708 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 709 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 710};
711
17280175 712static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 713 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
714 .rpc_call_done = nfs41_call_sync_done,
715};
716
7c513058
BS		 717static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
718 struct nfs_server *server,
ce5039c1
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
721 struct nfs4_sequence_res *res,
b257957e 722 int privileged)
ce5039c1
AA		 723{
724 int ret;
725 struct rpc_task *task;
726 struct nfs41_call_sync_data data = {
035168ab 727 .seq_server = server,
ce5039c1
AA		 728 .seq_args = args,
729 .seq_res = res,
ce5039c1
AA		 730 };
731 struct rpc_task_setup task_setup = {
7c513058 732 .rpc_client = clnt,
ce5039c1
AA		 733 .rpc_message = msg,
734 .callback_ops = &nfs41_call_sync_ops,
735 .callback_data = &data
736 };
737
b257957e
AB		 738 if (privileged)
739 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 740 task = rpc_run_task(&task_setup);
741 if (IS_ERR(task))
742 ret = PTR_ERR(task);
743 else {
744 ret = task->tk_status;
745 rpc_put_task(task);
746 }
747 return ret;
748}
749
7c513058
BS		 750int _nfs4_call_sync_session(struct rpc_clnt *clnt,
751 struct nfs_server *server,
cccef3b9
AA		 752 struct rpc_message *msg,
753 struct nfs4_sequence_args *args,
754 struct nfs4_sequence_res *res,
755 int cache_reply)
756{
9d12b216
TM		 757 nfs41_init_sequence(args, res, cache_reply);
758 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 759}
760
df896455 761#else
9d12b216
TM		 762static inline
763void nfs41_init_sequence(struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res, int cache_reply)
765{
766}
767
14516c3a
TM		 768static int nfs4_sequence_done(struct rpc_task *task,
769 struct nfs4_sequence_res *res)
df896455 770{
14516c3a 771 return 1;
df896455 772}
cccef3b9
AA		 773#endif /* CONFIG_NFS_V4_1 */
774
7c513058
BS		 775int _nfs4_call_sync(struct rpc_clnt *clnt,
776 struct nfs_server *server,
cccef3b9
AA		 777 struct rpc_message *msg,
778 struct nfs4_sequence_args *args,
779 struct nfs4_sequence_res *res,
780 int cache_reply)
781{
9d12b216 782 nfs41_init_sequence(args, res, cache_reply);
7c513058 783 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 784}
785
e73b83f2 786static inline
7c513058
BS		 787int nfs4_call_sync(struct rpc_clnt *clnt,
788 struct nfs_server *server,
e73b83f2
BS		 789 struct rpc_message *msg,
790 struct nfs4_sequence_args *args,
791 struct nfs4_sequence_res *res,
792 int cache_reply)
793{
7c513058
BS		 794 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
795 args, res, cache_reply);
e73b83f2 796}
cccef3b9 797
38478b24 798static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 799{
38478b24 800 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 801
38478b24 802 spin_lock(&dir->i_lock);
359d7d1c 803 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 804 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 805 nfs_force_lookup_revalidate(dir);
a9a4a87a 806 dir->i_version = cinfo->after;
38478b24 807 spin_unlock(&dir->i_lock);
1da177e4
LT		 808}
809
e56e0b78 810struct nfs4_opendata {
c6d00e63 811 struct kref kref;
e56e0b78
TM		 812 struct nfs_openargs o_arg;
813 struct nfs_openres o_res;
cdd4e68b
TM		 814 struct nfs_open_confirmargs c_arg;
815 struct nfs_open_confirmres c_res;
6926afd1
TM		 816 struct nfs4_string owner_name;
817 struct nfs4_string group_name;
e56e0b78 818 struct nfs_fattr f_attr;
e56e0b78 819 struct dentry *dir;
82a2c1b7 820 struct dentry *dentry;
e56e0b78 821 struct nfs4_state_owner *owner;
aac00a8d 822 struct nfs4_state *state;
e56e0b78 823 struct iattr attrs;
26e976a8 824 unsigned long timestamp;
3e309914 825 unsigned int rpc_done : 1;
24ac23ab
TM		 826 int rpc_status;
827 int cancelled;
e56e0b78
TM		 828};
829
2ced46c2
TM		 830
831static void nfs4_init_opendata_res(struct nfs4_opendata *p)
832{
833 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 834 p->o_res.seqid = p->o_arg.seqid;
835 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 836 p->o_res.server = p->o_arg.server;
837 nfs_fattr_init(&p->f_attr);
6926afd1 838 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 839}
840
82a2c1b7 841static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 842 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 843 const struct iattr *attrs,
844 gfp_t gfp_mask)
e56e0b78 845{
82a2c1b7 846 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 847 struct inode *dir = parent->d_inode;
848 struct nfs_server *server = NFS_SERVER(dir);
849 struct nfs4_opendata *p;
850
8535b2be 851 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 852 if (p == NULL)
853 goto err;
8535b2be 854 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 855 if (p->o_arg.seqid == NULL)
856 goto err_free;
82a2c1b7
AV		 857 nfs_sb_active(dentry->d_sb);
858 p->dentry = dget(dentry);
e56e0b78
TM		 859 p->dir = parent;
860 p->owner = sp;
861 atomic_inc(&sp->so_count);
862 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 863 p->o_arg.open_flags = flags;
864 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6168f62c
WAA		 865 /* ask server to check for all possible rights as results are cached */
866 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
867 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
7539bbab 868 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 869 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
870 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 871 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 872 p->o_arg.server = server;
873 p->o_arg.bitmask = server->attr_bitmask;
1549210f 874 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 875 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 876 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 877 __be32 verf[2];
d77d76ff 878
e56e0b78
TM		 879 p->o_arg.u.attrs = &p->attrs;
880 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 881
882 verf[0] = jiffies;
883 verf[1] = current->pid;
884 memcpy(p->o_arg.u.verifier.data, verf,
885 sizeof(p->o_arg.u.verifier.data));
e56e0b78 886 }
cdd4e68b
TM		 887 p->c_arg.fh = &p->o_res.fh;
888 p->c_arg.stateid = &p->o_res.stateid;
889 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 890 nfs4_init_opendata_res(p);
c6d00e63 891 kref_init(&p->kref);
e56e0b78
TM		 892 return p;
893err_free:
894 kfree(p);
895err:
896 dput(parent);
897 return NULL;
898}
899
c6d00e63 900static void nfs4_opendata_free(struct kref *kref)
e56e0b78 901{
c6d00e63
TM		 902 struct nfs4_opendata *p = container_of(kref,
903 struct nfs4_opendata, kref);
82a2c1b7 904 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 905
906 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 907 if (p->state != NULL)
908 nfs4_put_open_state(p->state);
c6d00e63
TM		 909 nfs4_put_state_owner(p->owner);
910 dput(p->dir);
82a2c1b7
AV		 911 dput(p->dentry);
912 nfs_sb_deactive(sb);
6926afd1 913 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 914 kfree(p);
915}
916
917static void nfs4_opendata_put(struct nfs4_opendata *p)
918{
919 if (p != NULL)
920 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 921}
922
06f814a3
TM		 923static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
924{
06f814a3
TM		 925 int ret;
926
06f814a3 927 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 928 return ret;
929}
930
dc0b027d 931static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 932{
933 int ret = 0;
dc0b027d 934
536e43d1 935 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 936 goto out;
937 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 938 case FMODE_READ:
88069f77
TM		 939 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
940 && state->n_rdonly != 0;
6ee41268
TM		 941 break;
942 case FMODE_WRITE:
88069f77
TM		 943 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
944 && state->n_wronly != 0;
6ee41268
TM		 945 break;
946 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 947 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
948 && state->n_rdwr != 0;
6ee41268 949 }
dc0b027d 950out:
6ee41268
TM		 951 return ret;
952}
953
dc0b027d 954static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 955{
652f89f6
TM		 956 if (delegation == NULL)
957 return 0;
dc0b027d 958 if ((delegation->type & fmode) != fmode)
aac00a8d 959 return 0;
15c831bf 960 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 961 return 0;
b7391f44 962 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 963 return 1;
964}
965
dc0b027d 966static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 967{
dc0b027d 968 switch (fmode) {
e7616923
TM		 969 case FMODE_WRITE:
970 state->n_wronly++;
971 break;
972 case FMODE_READ:
973 state->n_rdonly++;
974 break;
975 case FMODE_READ|FMODE_WRITE:
976 state->n_rdwr++;
977 }
dc0b027d 978 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 979}
980
dc0b027d 981static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 982{
983 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 984 nfs4_stateid_copy(&state->stateid, stateid);
985 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 986 switch (fmode) {
003707c7
TM		 987 case FMODE_READ:
988 set_bit(NFS_O_RDONLY_STATE, &state->flags);
989 break;
990 case FMODE_WRITE:
991 set_bit(NFS_O_WRONLY_STATE, &state->flags);
992 break;
993 case FMODE_READ|FMODE_WRITE:
994 set_bit(NFS_O_RDWR_STATE, &state->flags);
995 }
e7616923
TM		 996}
997
dc0b027d 998static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 999{
8bda4e4c 1000 write_seqlock(&state->seqlock);
dc0b027d 1001 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1002 write_sequnlock(&state->seqlock);
003707c7
TM		 1003}
1004
dc0b027d 1005static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1006{
8bda4e4c
TM		 1007 /*
1008 * Protect the call to nfs4_state_set_mode_locked and
1009 * serialise the stateid update
1010 */
1011 write_seqlock(&state->seqlock);
003707c7 1012 if (deleg_stateid != NULL) {
f597c537 1013 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1014 set_bit(NFS_DELEGATED_STATE, &state->flags);
1015 }
1016 if (open_stateid != NULL)
dc0b027d 1017 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1018 write_sequnlock(&state->seqlock);
1019 spin_lock(&state->owner->so_lock);
dc0b027d 1020 update_open_stateflags(state, fmode);
ec073428 1021 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1022}
1023
dc0b027d 1024static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1025{
1026 struct nfs_inode *nfsi = NFS_I(state->inode);
1027 struct nfs_delegation *deleg_cur;
1028 int ret = 0;
1029
dc0b027d 1030 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1031
1032 rcu_read_lock();
1033 deleg_cur = rcu_dereference(nfsi->delegation);
1034 if (deleg_cur == NULL)
1035 goto no_delegation;
1036
1037 spin_lock(&deleg_cur->lock);
1038 if (nfsi->delegation != deleg_cur ||
dc0b027d 1039 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1040 goto no_delegation_unlock;
1041
1042 if (delegation == NULL)
1043 delegation = &deleg_cur->stateid;
f597c537 1044 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1045 goto no_delegation_unlock;
1046
b7391f44 1047 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1048 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1049 ret = 1;
1050no_delegation_unlock:
1051 spin_unlock(&deleg_cur->lock);
1052no_delegation:
1053 rcu_read_unlock();
1054
1055 if (!ret && open_stateid != NULL) {
dc0b027d 1056 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1057 ret = 1;
1058 }
1059
1060 return ret;
1061}
1062
1063
dc0b027d 1064static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1065{
1066 struct nfs_delegation *delegation;
1067
1068 rcu_read_lock();
1069 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1070 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1071 rcu_read_unlock();
1072 return;
1073 }
1074 rcu_read_unlock();
57ec14c5 1075 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1076}
1077
6ee41268 1078static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1079{
1080 struct nfs4_state *state = opendata->state;
1081 struct nfs_inode *nfsi = NFS_I(state->inode);
1082 struct nfs_delegation *delegation;
536e43d1 1083 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1084 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1085 nfs4_stateid stateid;
1086 int ret = -EAGAIN;
1087
aac00a8d 1088 for (;;) {
dc0b027d 1089 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1090 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1091 if (can_open_cached(state, fmode, open_mode)) {
1092 update_open_stateflags(state, fmode);
6ee41268 1093 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1094 goto out_return_state;
1095 }
1096 spin_unlock(&state->owner->so_lock);
1097 }
34310430
TM		 1098 rcu_read_lock();
1099 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1100 if (!can_open_delegated(delegation, fmode)) {
34310430 1101 rcu_read_unlock();
aac00a8d 1102 break;
34310430 1103 }
aac00a8d 1104 /* Save the delegation */
f597c537 1105 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1106 rcu_read_unlock();
af22f94a 1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1108 if (ret != 0)
1109 goto out;
1110 ret = -EAGAIN;
34310430
TM		 1111
1112 /* Try to update the stateid using the delegation */
dc0b027d 1113 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1114 goto out_return_state;
aac00a8d 1115 }
aac00a8d
TM		 1116out:
1117 return ERR_PTR(ret);
1118out_return_state:
1119 atomic_inc(&state->count);
1120 return state;
1121}
1122
24ac23ab
TM		 1123static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1124{
1125 struct inode *inode;
1126 struct nfs4_state *state = NULL;
003707c7 1127 struct nfs_delegation *delegation;
1b370bc2 1128 int ret;
24ac23ab 1129
aac00a8d 1130 if (!data->rpc_done) {
6ee41268 1131 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1132 goto out;
1133 }
1134
1b370bc2 1135 ret = -EAGAIN;
24ac23ab 1136 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1137 goto err;
24ac23ab 1138 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1139 ret = PTR_ERR(inode);
03f28e3a 1140 if (IS_ERR(inode))
1b370bc2
TM		 1141 goto err;
1142 ret = -ENOMEM;
24ac23ab
TM		 1143 state = nfs4_get_open_state(inode, data->owner);
1144 if (state == NULL)
1b370bc2 1145 goto err_put_inode;
549d6ed5 1146 if (data->o_res.delegation_type != 0) {
4e0038b6 1147 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1148 int delegation_flags = 0;
1149
003707c7
TM		 1150 rcu_read_lock();
1151 delegation = rcu_dereference(NFS_I(inode)->delegation);
1152 if (delegation)
1153 delegation_flags = delegation->flags;
1154 rcu_read_unlock();
652f89f6
TM		 1155 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1156 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1157 "returning a delegation for "
1158 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1159 clp->cl_hostname);
652f89f6 1160 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1161 nfs_inode_set_delegation(state->inode,
1162 data->owner->so_cred,
1163 &data->o_res);
1164 else
1165 nfs_inode_reclaim_delegation(state->inode,
1166 data->owner->so_cred,
1167 &data->o_res);
1168 }
34310430
TM		 1169
1170 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1171 data->o_arg.fmode);
24ac23ab 1172 iput(inode);
aac00a8d 1173out:
24ac23ab 1174 return state;
1b370bc2
TM		 1175err_put_inode:
1176 iput(inode);
1177err:
1178 return ERR_PTR(ret);
24ac23ab
TM		 1179}
1180
864472e9
TM		 1181static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1182{
1183 struct nfs_inode *nfsi = NFS_I(state->inode);
1184 struct nfs_open_context *ctx;
1185
1186 spin_lock(&state->inode->i_lock);
1187 list_for_each_entry(ctx, &nfsi->open_files, list) {
1188 if (ctx->state != state)
1189 continue;
1190 get_nfs_open_context(ctx);
1191 spin_unlock(&state->inode->i_lock);
1192 return ctx;
1193 }
1194 spin_unlock(&state->inode->i_lock);
1195 return ERR_PTR(-ENOENT);
1196}
1197
6f220ed5
TM		 1198static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1199{
1200 struct nfs4_opendata *opendata;
1201
3d4ff43d 1202 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1203 if (opendata == NULL)
1204 return ERR_PTR(-ENOMEM);
1205 opendata->state = state;
1206 atomic_inc(&state->count);
1207 return opendata;
1208}
1209
dc0b027d 1210static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1211{
2ced46c2 1212 struct nfs4_state *newstate;
864472e9
TM		 1213 int ret;
1214
dc0b027d
TM		 1215 opendata->o_arg.open_flags = 0;
1216 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1217 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1218 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1219 nfs4_init_opendata_res(opendata);
b257957e 1220 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1221 if (ret != 0)
1222 return ret;
2ced46c2 1223 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1224 if (IS_ERR(newstate))
1225 return PTR_ERR(newstate);
643168c2 1226 nfs4_close_state(newstate, fmode);
2ced46c2 1227 *res = newstate;
864472e9
TM		 1228 return 0;
1229}
1230
1231static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1232{
864472e9 1233 struct nfs4_state *newstate;
864472e9
TM		 1234 int ret;
1235
1236 /* memory barrier prior to reading state->n_* */
2ced46c2 1237 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1238 smp_rmb();
1239 if (state->n_rdwr != 0) {
b0ed9dbc 1240 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1241 ret = nfs4_open_recover_helper(opendata, FMODE_READ|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_wronly != 0) {
b0ed9dbc 1248 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1249 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1250 if (ret != 0)
1251 return ret;
2ced46c2
TM		 1252 if (newstate != state)
1253 return -ESTALE;
864472e9
TM		 1254 }
1255 if (state->n_rdonly != 0) {
b0ed9dbc 1256 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1257 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1258 if (ret != 0)
1259 return ret;
2ced46c2
TM		 1260 if (newstate != state)
1261 return -ESTALE;
864472e9 1262 }
1ac7e2fd
TM		 1263 /*
1264 * We may have performed cached opens for all three recoveries.
1265 * Check if we need to update the current stateid.
1266 */
1267 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1268 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1269 write_seqlock(&state->seqlock);
1ac7e2fd 1270 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1271 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1272 write_sequnlock(&state->seqlock);
1ac7e2fd 1273 }
864472e9
TM		 1274 return 0;
1275}
1276
1da177e4
LT		 1277/*
1278 * OPEN_RECLAIM:
1279 * reclaim state on the server after a reboot.
1da177e4 1280 */
539cd03a 1281static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1282{
1ac7e2fd 1283 struct nfs_delegation *delegation;
864472e9 1284 struct nfs4_opendata *opendata;
dc0b027d 1285 fmode_t delegation_type = 0;
1da177e4
LT		 1286 int status;
1287
6f220ed5
TM		 1288 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1289 if (IS_ERR(opendata))
1290 return PTR_ERR(opendata);
864472e9
TM		 1291 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1292 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1293 rcu_read_lock();
1294 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1295 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1296 delegation_type = delegation->type;
1ac7e2fd 1297 rcu_read_unlock();
864472e9
TM		 1298 opendata->o_arg.u.delegation_type = delegation_type;
1299 status = nfs4_open_recover(opendata, state);
c6d00e63 1300 nfs4_opendata_put(opendata);
1da177e4
LT		 1301 return status;
1302}
1303
539cd03a 1304static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1305{
1306 struct nfs_server *server = NFS_SERVER(state->inode);
1307 struct nfs4_exception exception = { };
1308 int err;
1309 do {
539cd03a 1310 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1311 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1312 break;
1313 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1314 } while (exception.retry);
1315 return err;
1316}
1317
864472e9
TM		 1318static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1319{
1320 struct nfs_open_context *ctx;
1321 int ret;
1322
1323 ctx = nfs4_state_find_open_context(state);
1324 if (IS_ERR(ctx))
1325 return PTR_ERR(ctx);
539cd03a 1326 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1327 put_nfs_open_context(ctx);
1328 return ret;
1329}
1330
13437e12 1331static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1332{
e56e0b78 1333 struct nfs4_opendata *opendata;
864472e9 1334 int ret;
1da177e4 1335
6f220ed5
TM		 1336 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1337 if (IS_ERR(opendata))
1338 return PTR_ERR(opendata);
e56e0b78 1339 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1340 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1341 ret = nfs4_open_recover(opendata, state);
c6d00e63 1342 nfs4_opendata_put(opendata);
864472e9 1343 return ret;
1da177e4
LT		 1344}
1345
13437e12 1346int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1347{
1348 struct nfs4_exception exception = { };
539cd03a 1349 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1350 int err;
1351 do {
13437e12 1352 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1353 switch (err) {
1354 case 0:
965b5d67
TM		 1355 case -ENOENT:
1356 case -ESTALE:
1357 goto out;
bcfa49f6
RL		 1358 case -NFS4ERR_BADSESSION:
1359 case -NFS4ERR_BADSLOT:
1360 case -NFS4ERR_BAD_HIGH_SLOT:
1361 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1362 case -NFS4ERR_DEADSESSION:
9f594791 1363 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1364 goto out;
1da177e4
LT		 1365 case -NFS4ERR_STALE_CLIENTID:
1366 case -NFS4ERR_STALE_STATEID:
1367 case -NFS4ERR_EXPIRED:
1368 /* Don't recall a delegation if it was lost */
0400a6b0 1369 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1370 goto out;
1371 case -ERESTARTSYS:
1372 /*
1373 * The show must go on: exit, but mark the
1374 * stateid as needing recovery.
1375 */
a1d0b5ee 1376 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1377 case -NFS4ERR_ADMIN_REVOKED:
1378 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1379 nfs_inode_find_state_and_recover(state->inode,
1380 stateid);
0400a6b0 1381 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1382 case -EKEYEXPIRED:
1383 /*
1384 * User RPCSEC_GSS context has expired.
1385 * We cannot recover this stateid now, so
1386 * skip it and allow recovery thread to
1387 * proceed.
1388 */
965b5d67
TM		 1389 case -ENOMEM:
1390 err = 0;
1391 goto out;
1da177e4
LT		 1392 }
1393 err = nfs4_handle_exception(server, err, &exception);
1394 } while (exception.retry);
965b5d67 1395out:
1da177e4
LT		 1396 return err;
1397}
1398
cdd4e68b
TM		 1399static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1400{
1401 struct nfs4_opendata *data = calldata;
1402
1403 data->rpc_status = task->tk_status;
26e976a8 1404 if (data->rpc_status == 0) {
f597c537 1405 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1406 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1407 renew_lease(data->o_res.server, data->timestamp);
3e309914 1408 data->rpc_done = 1;
26e976a8 1409 }
cdd4e68b
TM		 1410}
1411
1412static void nfs4_open_confirm_release(void *calldata)
1413{
1414 struct nfs4_opendata *data = calldata;
1415 struct nfs4_state *state = NULL;
1416
1417 /* If this request hasn't been cancelled, do nothing */
1418 if (data->cancelled == 0)
1419 goto out_free;
1420 /* In case of error, no cleanup! */
3e309914 1421 if (!data->rpc_done)
cdd4e68b 1422 goto out_free;
cdd4e68b 1423 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1424 if (!IS_ERR(state))
643168c2 1425 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1426out_free:
c6d00e63 1427 nfs4_opendata_put(data);
cdd4e68b
TM		 1428}
1429
1430static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1431 .rpc_call_done = nfs4_open_confirm_done,
1432 .rpc_release = nfs4_open_confirm_release,
1433};
1434
1435/*
1436 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1437 */
1438static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1439{
1440 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1441 struct rpc_task *task;
5138fde0
TM		 1442 struct rpc_message msg = {
1443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1444 .rpc_argp = &data->c_arg,
1445 .rpc_resp = &data->c_res,
1446 .rpc_cred = data->owner->so_cred,
1447 };
c970aa85
TM		 1448 struct rpc_task_setup task_setup_data = {
1449 .rpc_client = server->client,
5138fde0 1450 .rpc_message = &msg,
c970aa85
TM		 1451 .callback_ops = &nfs4_open_confirm_ops,
1452 .callback_data = data,
101070ca 1453 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1454 .flags = RPC_TASK_ASYNC,
1455 };
1da177e4
LT		 1456 int status;
1457
c6d00e63 1458 kref_get(&data->kref);
3e309914
TM		 1459 data->rpc_done = 0;
1460 data->rpc_status = 0;
5138fde0 1461 data->timestamp = jiffies;
c970aa85 1462 task = rpc_run_task(&task_setup_data);
7a1218a2 1463 if (IS_ERR(task))
cdd4e68b 1464 return PTR_ERR(task);
cdd4e68b
TM		 1465 status = nfs4_wait_for_completion_rpc_task(task);
1466 if (status != 0) {
1467 data->cancelled = 1;
1468 smp_wmb();
1469 } else
1470 status = data->rpc_status;
e6b3c4db 1471 rpc_put_task(task);
1da177e4
LT		 1472 return status;
1473}
1474
24ac23ab 1475static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1476{
24ac23ab
TM		 1477 struct nfs4_opendata *data = calldata;
1478 struct nfs4_state_owner *sp = data->owner;
5138fde0 1479
24ac23ab
TM		 1480 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1481 return;
aac00a8d
TM		 1482 /*
1483 * Check if we still need to send an OPEN call, or if we can use
1484 * a delegation instead.
1485 */
1486 if (data->state != NULL) {
1487 struct nfs_delegation *delegation;
1488
dc0b027d 1489 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1490 goto out_no_action;
aac00a8d
TM		 1491 rcu_read_lock();
1492 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1493 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1494 can_open_delegated(delegation, data->o_arg.fmode))
1495 goto unlock_no_action;
aac00a8d
TM		 1496 rcu_read_unlock();
1497 }
95b72eb0 1498 /* Update client id. */
1f0e890d 1499 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1500 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1501 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1502 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1503 }
26e976a8 1504 data->timestamp = jiffies;
035168ab 1505 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1506 &data->o_arg.seq_args,
9d12b216 1507 &data->o_res.seq_res, task))
d898528c 1508 return;
5138fde0 1509 rpc_call_start(task);
6ee41268 1510 return;
652f89f6
TM		 1511unlock_no_action:
1512 rcu_read_unlock();
6ee41268
TM		 1513out_no_action:
1514 task->tk_action = NULL;
1515
24ac23ab 1516}
1da177e4 1517
b257957e
AB		 1518static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1519{
1520 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1521 nfs4_open_prepare(task, calldata);
1522}
1523
24ac23ab
TM		 1524static void nfs4_open_done(struct rpc_task *task, void *calldata)
1525{
1526 struct nfs4_opendata *data = calldata;
1da177e4 1527
24ac23ab 1528 data->rpc_status = task->tk_status;
d898528c 1529
14516c3a
TM		 1530 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1531 return;
d898528c 1532
24ac23ab
TM		 1533 if (task->tk_status == 0) {
1534 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1535 case S_IFREG:
1536 break;
1537 case S_IFLNK:
24ac23ab 1538 data->rpc_status = -ELOOP;
6f926b5b
TM		 1539 break;
1540 case S_IFDIR:
24ac23ab 1541 data->rpc_status = -EISDIR;
6f926b5b
TM		 1542 break;
1543 default:
24ac23ab 1544 data->rpc_status = -ENOTDIR;
6f926b5b 1545 }
26e976a8 1546 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1547 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1548 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1549 }
3e309914 1550 data->rpc_done = 1;
24ac23ab 1551}
6f926b5b 1552
24ac23ab
TM		 1553static void nfs4_open_release(void *calldata)
1554{
1555 struct nfs4_opendata *data = calldata;
1556 struct nfs4_state *state = NULL;
1557
1558 /* If this request hasn't been cancelled, do nothing */
1559 if (data->cancelled == 0)
1560 goto out_free;
1561 /* In case of error, no cleanup! */
3e309914 1562 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1563 goto out_free;
1564 /* In case we need an open_confirm, no cleanup! */
1565 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1566 goto out_free;
24ac23ab 1567 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1568 if (!IS_ERR(state))
643168c2 1569 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1570out_free:
c6d00e63 1571 nfs4_opendata_put(data);
24ac23ab
TM		 1572}
1573
1574static const struct rpc_call_ops nfs4_open_ops = {
1575 .rpc_call_prepare = nfs4_open_prepare,
1576 .rpc_call_done = nfs4_open_done,
1577 .rpc_release = nfs4_open_release,
1578};
1579
b257957e
AB		 1580static const struct rpc_call_ops nfs4_recover_open_ops = {
1581 .rpc_call_prepare = nfs4_recover_open_prepare,
1582 .rpc_call_done = nfs4_open_done,
1583 .rpc_release = nfs4_open_release,
1584};
1585
1586static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1587{
1588 struct inode *dir = data->dir->d_inode;
1589 struct nfs_server *server = NFS_SERVER(dir);
1590 struct nfs_openargs *o_arg = &data->o_arg;
1591 struct nfs_openres *o_res = &data->o_res;
1592 struct rpc_task *task;
5138fde0
TM		 1593 struct rpc_message msg = {
1594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1595 .rpc_argp = o_arg,
1596 .rpc_resp = o_res,
1597 .rpc_cred = data->owner->so_cred,
1598 };
c970aa85
TM		 1599 struct rpc_task_setup task_setup_data = {
1600 .rpc_client = server->client,
5138fde0 1601 .rpc_message = &msg,
c970aa85
TM		 1602 .callback_ops = &nfs4_open_ops,
1603 .callback_data = data,
101070ca 1604 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1605 .flags = RPC_TASK_ASYNC,
1606 };
24ac23ab
TM		 1607 int status;
1608
9d12b216 1609 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1610 kref_get(&data->kref);
3e309914
TM		 1611 data->rpc_done = 0;
1612 data->rpc_status = 0;
2ced46c2 1613 data->cancelled = 0;
b257957e
AB		 1614 if (isrecover)
1615 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1616 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1617 if (IS_ERR(task))
1618 return PTR_ERR(task);
1619 status = nfs4_wait_for_completion_rpc_task(task);
1620 if (status != 0) {
1621 data->cancelled = 1;
1622 smp_wmb();
1623 } else
1624 status = data->rpc_status;
1625 rpc_put_task(task);
1626
1627 return status;
1628}
1629
1630static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1631{
1632 struct inode *dir = data->dir->d_inode;
1633 struct nfs_openres *o_res = &data->o_res;
1634 int status;
1635
1636 status = nfs4_run_open_task(data, 1);
1637 if (status != 0 || !data->rpc_done)
1638 return status;
1639
6926afd1
TM		 1640 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1641
b257957e
AB		 1642 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1643 status = _nfs4_proc_open_confirm(data);
1644 if (status != 0)
1645 return status;
1646 }
1647
1648 return status;
1649}
1650
6168f62c
WAA		 1651static int nfs4_opendata_access(struct rpc_cred *cred,
1652 struct nfs4_opendata *opendata,
1653 struct nfs4_state *state, fmode_t fmode)
1654{
1655 struct nfs_access_entry cache;
1656 u32 mask;
1657
1658 /* access call failed or for some reason the server doesn't
1659 * support any access modes -- defer access call until later */
1660 if (opendata->o_res.access_supported == 0)
1661 return 0;
1662
1663 mask = 0;
1664 if (fmode & FMODE_READ)
1665 mask |= MAY_READ;
1666 if (fmode & FMODE_WRITE)
1667 mask |= MAY_WRITE;
1668 if (fmode & FMODE_EXEC)
1669 mask |= MAY_EXEC;
1670
1671 cache.cred = cred;
1672 cache.jiffies = jiffies;
1673 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1674 nfs_access_add_cache(state->inode, &cache);
1675
1676 if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
1677 return 0;
1678
1679 /* even though OPEN succeeded, access is denied. Close the file */
1680 nfs4_close_state(state, fmode);
1681 return -NFS4ERR_ACCESS;
1682}
1683
b257957e
AB		 1684/*
1685 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1686 */
1687static int _nfs4_proc_open(struct nfs4_opendata *data)
1688{
1689 struct inode *dir = data->dir->d_inode;
1690 struct nfs_server *server = NFS_SERVER(dir);
1691 struct nfs_openargs *o_arg = &data->o_arg;
1692 struct nfs_openres *o_res = &data->o_res;
1693 int status;
1694
1695 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1696 if (!data->rpc_done)
1697 return status;
1698 if (status != 0) {
1699 if (status == -NFS4ERR_BADNAME &&
1700 !(o_arg->open_flags & O_CREAT))
1701 return -ENOENT;
24ac23ab 1702 return status;
08ef7bd3 1703 }
24ac23ab 1704
6926afd1
TM		 1705 nfs_fattr_map_and_free_names(server, &data->f_attr);
1706
90ff0c54 1707 if (o_arg->open_flags & O_CREAT)
56ae19f3 1708 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1709 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1710 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1711 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1712 status = _nfs4_proc_open_confirm(data);
1da177e4 1713 if (status != 0)
24ac23ab 1714 return status;
1da177e4
LT		 1715 }
1716 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1717 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1718 return 0;
1da177e4
LT		 1719}
1720
d83217c1 1721static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1722{
a78cb57a 1723 unsigned int loop;
6b30954e 1724 int ret;
58d9714a 1725
a78cb57a 1726 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1727 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1728 if (ret != 0)
a78cb57a 1729 break;
e598d843
TM		 1730 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1731 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1732 break;
0400a6b0 1733 nfs4_schedule_state_manager(clp);
a78cb57a 1734 ret = -EIO;
6b30954e 1735 }
a78cb57a 1736 return ret;
58d9714a
TM		 1737}
1738
d83217c1
AA		 1739static int nfs4_recover_expired_lease(struct nfs_server *server)
1740{
1741 return nfs4_client_recover_expired_lease(server->nfs_client);
1742}
1743
1da177e4
LT		 1744/*
1745 * OPEN_EXPIRED:
1746 * reclaim state on the server after a network partition.
1747 * Assumes caller holds the appropriate lock
1748 */
539cd03a 1749static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1750{
e56e0b78 1751 struct nfs4_opendata *opendata;
864472e9 1752 int ret;
1da177e4 1753
6f220ed5
TM		 1754 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1755 if (IS_ERR(opendata))
1756 return PTR_ERR(opendata);
864472e9 1757 ret = nfs4_open_recover(opendata, state);
35d05778 1758 if (ret == -ESTALE)
3d4ff43d 1759 d_drop(ctx->dentry);
c6d00e63 1760 nfs4_opendata_put(opendata);
864472e9 1761 return ret;
1da177e4
LT		 1762}
1763
a9ed2e25 1764static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1765{
539cd03a 1766 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1767 struct nfs4_exception exception = { };
1768 int err;
1769
1770 do {
539cd03a 1771 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1772 switch (err) {
1773 default:
1774 goto out;
1775 case -NFS4ERR_GRACE:
1776 case -NFS4ERR_DELAY:
1777 nfs4_handle_exception(server, err, &exception);
1778 err = 0;
1779 }
202b50dc 1780 } while (exception.retry);
a9ed2e25 1781out:
202b50dc
TM		 1782 return err;
1783}
1784
1da177e4
LT		 1785static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1786{
1da177e4 1787 struct nfs_open_context *ctx;
864472e9 1788 int ret;
1da177e4 1789
864472e9
TM		 1790 ctx = nfs4_state_find_open_context(state);
1791 if (IS_ERR(ctx))
1792 return PTR_ERR(ctx);
539cd03a 1793 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1794 put_nfs_open_context(ctx);
1795 return ret;
1da177e4
LT		 1796}
1797
f062eb6c 1798#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1799static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1800{
f062eb6c 1801 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1802 nfs4_stateid *stateid = &state->stateid;
1803 int status;
1804
1805 /* If a state reset has been done, test_stateid is unneeded */
1806 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1807 return;
1808
1809 status = nfs41_test_stateid(server, stateid);
1810 if (status != NFS_OK) {
1811 /* Free the stateid unless the server explicitly
1812 * informs us the stateid is unrecognized. */
1813 if (status != -NFS4ERR_BAD_STATEID)
1814 nfs41_free_stateid(server, stateid);
6938867e 1815 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1816
6938867e
BS		 1817 write_seqlock(&state->seqlock);
1818 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1819 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1820 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1821 }
1822}
1823
1824/**
1825 * nfs41_check_open_stateid - possibly free an open stateid
1826 *
1827 * @state: NFSv4 state for an inode
1828 *
1829 * Returns NFS_OK if recovery for this stateid is now finished.
1830 * Otherwise a negative NFS4ERR value is returned.
1831 */
1832static int nfs41_check_open_stateid(struct nfs4_state *state)
1833{
1834 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1835 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1836 int status;
1837
1838 /* If a state reset has been done, test_stateid is unneeded */
1839 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1840 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1841 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1842 return -NFS4ERR_BAD_STATEID;
1843
1844 status = nfs41_test_stateid(server, stateid);
1845 if (status != NFS_OK) {
1846 /* Free the stateid unless the server explicitly
1847 * informs us the stateid is unrecognized. */
1848 if (status != -NFS4ERR_BAD_STATEID)
1849 nfs41_free_stateid(server, stateid);
1850
1851 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1852 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1853 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1854 }
1855 return status;
1856}
1857
1858static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1859{
eb64cf96 1860 int status;
b01dd1d8 1861
3e60ffdd
CL		 1862 nfs41_clear_delegation_stateid(state);
1863 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1864 if (status != NFS_OK)
1865 status = nfs4_open_expired(sp, state);
1866 return status;
f062eb6c
BS		 1867}
1868#endif
1869
aa53ed54
JL		 1870/*
1871 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1872 * fields corresponding to attributes that were used to store the verifier.
1873 * Make sure we clobber those fields in the later setattr call
1874 */
1875static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1876{
1877 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1878 !(sattr->ia_valid & ATTR_ATIME_SET))
1879 sattr->ia_valid |= ATTR_ATIME;
1880
1881 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1882 !(sattr->ia_valid & ATTR_MTIME_SET))
1883 sattr->ia_valid |= ATTR_MTIME;
1884}
1885
1da177e4 1886/*
24ac23ab 1887 * Returns a referenced nfs4_state
1da177e4 1888 */
82be417a
AA		 1889static int _nfs4_do_open(struct inode *dir,
1890 struct dentry *dentry,
1891 fmode_t fmode,
1892 int flags,
1893 struct iattr *sattr,
1894 struct rpc_cred *cred,
1895 struct nfs4_state **res,
1896 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1897{
1898 struct nfs4_state_owner *sp;
1899 struct nfs4_state *state = NULL;
1900 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1901 struct nfs4_opendata *opendata;
aac00a8d 1902 int status;
1da177e4
LT		 1903
1904 /* Protect against reboot recovery conflicts */
1da177e4 1905 status = -ENOMEM;
d1e284d5
TM		 1906 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1907 if (sp == NULL) {
1da177e4
LT		 1908 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1909 goto out_err;
1910 }
58d9714a
TM		 1911 status = nfs4_recover_expired_lease(server);
1912 if (status != 0)
b4454fe1 1913 goto err_put_state_owner;
82a2c1b7
AV		 1914 if (dentry->d_inode != NULL)
1915 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1916 status = -ENOMEM;
82a2c1b7 1917 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1918 if (opendata == NULL)
95d35cb4 1919 goto err_put_state_owner;
1da177e4 1920
82be417a
AA		 1921 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1922 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1923 if (!opendata->f_attr.mdsthreshold)
1924 goto err_opendata_put;
1549210f 1925 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1926 }
82a2c1b7
AV		 1927 if (dentry->d_inode != NULL)
1928 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1929
24ac23ab 1930 status = _nfs4_proc_open(opendata);
1da177e4 1931 if (status != 0)
c6d00e63 1932 goto err_opendata_put;
1da177e4 1933
24ac23ab 1934 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1935 status = PTR_ERR(state);
1936 if (IS_ERR(state))
c6d00e63 1937 goto err_opendata_put;
0df5dd4a 1938 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1939 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1940
6168f62c
WAA		 1941 status = nfs4_opendata_access(cred, opendata, state, fmode);
1942 if (status != 0)
1943 goto err_opendata_put;
1944
0ab64e0e
TM		 1945 if (opendata->o_arg.open_flags & O_EXCL) {
1946 nfs4_exclusive_attrset(opendata, sattr);
1947
1948 nfs_fattr_init(opendata->o_res.f_attr);
1949 status = nfs4_do_setattr(state->inode, cred,
1950 opendata->o_res.f_attr, sattr,
1951 state);
1952 if (status == 0)
1953 nfs_setattr_update_inode(state->inode, sattr);
1954 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1955 }
82be417a
AA		 1956
1957 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1958 *ctx_th = opendata->f_attr.mdsthreshold;
1959 else
1960 kfree(opendata->f_attr.mdsthreshold);
1961 opendata->f_attr.mdsthreshold = NULL;
1962
c6d00e63 1963 nfs4_opendata_put(opendata);
1da177e4 1964 nfs4_put_state_owner(sp);
1da177e4
LT		 1965 *res = state;
1966 return 0;
c6d00e63 1967err_opendata_put:
82be417a 1968 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1969 nfs4_opendata_put(opendata);
e56e0b78
TM		 1970err_put_state_owner:
1971 nfs4_put_state_owner(sp);
1da177e4 1972out_err:
1da177e4
LT		 1973 *res = NULL;
1974 return status;
1975}
1976
1977
82be417a
AA		 1978static struct nfs4_state *nfs4_do_open(struct inode *dir,
1979 struct dentry *dentry,
1980 fmode_t fmode,
1981 int flags,
1982 struct iattr *sattr,
1983 struct rpc_cred *cred,
1984 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1985{
1986 struct nfs4_exception exception = { };
1987 struct nfs4_state *res;
1988 int status;
1989
6168f62c 1990 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1991 do {
82be417a
AA		 1992 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1993 &res, ctx_th);
1da177e4
LT		 1994 if (status == 0)
1995 break;
1996 /* NOTE: BAD_SEQID means the server and client disagree about the
1997 * book-keeping w.r.t. state-changing operations
1998 * (OPEN/CLOSE/LOCK/LOCKU...)
1999 * It is actually a sign of a bug on the client or on the server.
2000 *
2001 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2002 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2003 * have unhashed the old state_owner for us, and that we can
2004 * therefore safely retry using a new one. We should still warn
2005 * the user though...
2006 */
2007 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2008 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2009 " returned a bad sequence-id error!\n",
2010 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2011 exception.retry = 1;
2012 continue;
2013 }
550f5747
TM		 2014 /*
2015 * BAD_STATEID on OPEN means that the server cancelled our
2016 * state before it received the OPEN_CONFIRM.
2017 * Recover by retrying the request as per the discussion
2018 * on Page 181 of RFC3530.
2019 */
2020 if (status == -NFS4ERR_BAD_STATEID) {
2021 exception.retry = 1;
2022 continue;
2023 }
aac00a8d
TM		 2024 if (status == -EAGAIN) {
2025 /* We must have found a delegation */
2026 exception.retry = 1;
2027 continue;
2028 }
1da177e4
LT		 2029 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2030 status, &exception));
2031 } while (exception.retry);
2032 return res;
2033}
2034
659bfcd6
TM		 2035static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2036 struct nfs_fattr *fattr, struct iattr *sattr,
2037 struct nfs4_state *state)
1da177e4 2038{
3e4f6290 2039 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2040 struct nfs_setattrargs arg = {
3e4f6290 2041 .fh = NFS_FH(inode),
1da177e4
LT		 2042 .iap = sattr,
2043 .server = server,
2044 .bitmask = server->attr_bitmask,
2045 };
2046 struct nfs_setattrres res = {
2047 .fattr = fattr,
2048 .server = server,
2049 };
2050 struct rpc_message msg = {
659bfcd6
TM		 2051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2052 .rpc_argp = &arg,
2053 .rpc_resp = &res,
2054 .rpc_cred = cred,
1da177e4 2055 };
26e976a8 2056 unsigned long timestamp = jiffies;
65e4308d 2057 int status;
1da177e4 2058
0e574af1 2059 nfs_fattr_init(fattr);
1da177e4 2060
4fc8796d 2061 if (state != NULL) {
2a369153
TM		 2062 struct nfs_lockowner lockowner = {
2063 .l_owner = current->files,
2064 .l_pid = current->tgid,
2065 };
4fc8796d 2066 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2067 &lockowner);
4fc8796d
TM		 2068 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2069 FMODE_WRITE)) {
3e4f6290 2070 /* Use that stateid */
08e9eac4 2071 } else
f597c537 2072 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2073
7c513058 2074 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2075 if (status == 0 && state != NULL)
2076 renew_lease(server, timestamp);
65e4308d 2077 return status;
1da177e4
LT		 2078}
2079
659bfcd6
TM		 2080static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2081 struct nfs_fattr *fattr, struct iattr *sattr,
2082 struct nfs4_state *state)
1da177e4 2083{
3e4f6290 2084 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2085 struct nfs4_exception exception = {
2086 .state = state,
3114ea7a 2087 .inode = inode,
a1d0b5ee 2088 };
1da177e4
LT		 2089 int err;
2090 do {
451146be
TM		 2091 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2092 switch (err) {
2093 case -NFS4ERR_OPENMODE:
2094 if (state && !(state->state & FMODE_WRITE)) {
2095 err = -EBADF;
2096 if (sattr->ia_valid & ATTR_OPEN)
2097 err = -EACCES;
2098 goto out;
2099 }
2100 }
2101 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2102 } while (exception.retry);
451146be 2103out:
1da177e4
LT		 2104 return err;
2105}
2106
2107struct nfs4_closedata {
2108 struct inode *inode;
2109 struct nfs4_state *state;
2110 struct nfs_closeargs arg;
2111 struct nfs_closeres res;
516a6af6 2112 struct nfs_fattr fattr;
26e976a8 2113 unsigned long timestamp;
f7e8917a
FI		 2114 bool roc;
2115 u32 roc_barrier;
1da177e4
LT		 2116};
2117
963d8fe5 2118static void nfs4_free_closedata(void *data)
9512135d 2119{
963d8fe5
TM		 2120 struct nfs4_closedata *calldata = data;
2121 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2122 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2123
f7e8917a
FI		 2124 if (calldata->roc)
2125 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2126 nfs4_put_open_state(calldata->state);
2127 nfs_free_seqid(calldata->arg.seqid);
9512135d 2128 nfs4_put_state_owner(sp);
643168c2 2129 nfs_sb_deactive(sb);
9512135d
TM		 2130 kfree(calldata);
2131}
2132
88069f77
TM		 2133static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2134 fmode_t fmode)
2135{
2136 spin_lock(&state->owner->so_lock);
2137 if (!(fmode & FMODE_READ))
2138 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2139 if (!(fmode & FMODE_WRITE))
2140 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2141 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2142 spin_unlock(&state->owner->so_lock);
2143}
2144
963d8fe5 2145static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2146{
963d8fe5 2147 struct nfs4_closedata *calldata = data;
1da177e4 2148 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2149 struct nfs_server *server = NFS_SERVER(calldata->inode);
2150
a3ca5651 2151 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2152 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2153 return;
1da177e4
LT		 2154 /* hmm. we are done with the inode, and in the process of freeing
2155 * the state_owner. we keep this around to process errors
2156 */
1da177e4
LT		 2157 switch (task->tk_status) {
2158 case 0:
f7e8917a
FI		 2159 if (calldata->roc)
2160 pnfs_roc_set_barrier(state->inode,
2161 calldata->roc_barrier);
45328c35 2162 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2163 renew_lease(server, calldata->timestamp);
88069f77
TM		 2164 nfs4_close_clear_stateid_flags(state,
2165 calldata->arg.fmode);
1da177e4
LT		 2166 break;
2167 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2168 case -NFS4ERR_OLD_STATEID:
2169 case -NFS4ERR_BAD_STATEID:
1da177e4 2170 case -NFS4ERR_EXPIRED:
dc0b027d 2171 if (calldata->arg.fmode == 0)
9e33bed5 2172 break;
1da177e4 2173 default:
72211dbe
TM		 2174 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2175 rpc_restart_call_prepare(task);
1da177e4 2176 }
72211dbe 2177 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2178 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2179 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2180}
2181
4ce70ada 2182static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2183{
4ce70ada 2184 struct nfs4_closedata *calldata = data;
9512135d 2185 struct nfs4_state *state = calldata->state;
7fdab069 2186 struct inode *inode = calldata->inode;
88069f77 2187 int call_close = 0;
9512135d 2188
a3ca5651 2189 dprintk("%s: begin!\n", __func__);
963d8fe5 2190 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2191 return;
003707c7 2192
88069f77
TM		 2193 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2194 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2195 spin_lock(&state->owner->so_lock);
003707c7 2196 /* Calculate the change in open mode */
e7616923 2197 if (state->n_rdwr == 0) {
003707c7 2198 if (state->n_rdonly == 0) {
88069f77
TM		 2199 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2200 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2201 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2202 }
2203 if (state->n_wronly == 0) {
88069f77
TM		 2204 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2205 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2206 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2207 }
e7616923 2208 }
4cecb76f 2209 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2210
2211 if (!call_close) {
963d8fe5
TM		 2212 /* Note: exit _without_ calling nfs4_close_done */
2213 task->tk_action = NULL;
a3ca5651 2214 goto out;
9512135d 2215 }
88069f77 2216
f7e8917a 2217 if (calldata->arg.fmode == 0) {
88069f77 2218 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2219 if (calldata->roc &&
7fdab069 2220 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2221 goto out;
f7e8917a 2222 }
88069f77 2223
516a6af6 2224 nfs_fattr_init(calldata->res.fattr);
26e976a8 2225 calldata->timestamp = jiffies;
7fdab069 2226 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2227 &calldata->arg.seq_args,
2228 &calldata->res.seq_res,
2229 task))
a3ca5651 2230 goto out;
5138fde0 2231 rpc_call_start(task);
a3ca5651
CL		 2232out:
2233 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2234}
2235
963d8fe5 2236static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2237 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2238 .rpc_call_done = nfs4_close_done,
2239 .rpc_release = nfs4_free_closedata,
2240};
2241
1da177e4
LT		 2242/*
2243 * It is possible for data to be read/written from a mem-mapped file
2244 * after the sys_close call (which hits the vfs layer as a flush).
2245 * This means that we can't safely call nfsv4 close on a file until
2246 * the inode is cleared. This in turn means that we are not good
2247 * NFSv4 citizens - we do not indicate to the server to update the file's
2248 * share state even when we are done with one of the three share
2249 * stateid's in the inode.
2250 *
2251 * NOTE: Caller must be holding the sp->so_owner semaphore!
2252 */
1f7977c1 2253int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2254{
4a35bd41 2255 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2256 struct nfs4_closedata *calldata;
b39e625b
TM		 2257 struct nfs4_state_owner *sp = state->owner;
2258 struct rpc_task *task;
5138fde0
TM		 2259 struct rpc_message msg = {
2260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2261 .rpc_cred = state->owner->so_cred,
2262 };
c970aa85
TM		 2263 struct rpc_task_setup task_setup_data = {
2264 .rpc_client = server->client,
5138fde0 2265 .rpc_message = &msg,
c970aa85 2266 .callback_ops = &nfs4_close_ops,
101070ca 2267 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2268 .flags = RPC_TASK_ASYNC,
2269 };
9512135d 2270 int status = -ENOMEM;
1da177e4 2271
8535b2be 2272 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2273 if (calldata == NULL)
9512135d 2274 goto out;
9d12b216 2275 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2276 calldata->inode = state->inode;
1da177e4 2277 calldata->state = state;
4a35bd41 2278 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2279 calldata->arg.stateid = &state->open_stateid;
1da177e4 2280 /* Serialization for the sequence id */
8535b2be 2281 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2282 if (calldata->arg.seqid == NULL)
2283 goto out_free_calldata;
dc0b027d 2284 calldata->arg.fmode = 0;
a65318bf 2285 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2286 calldata->res.fattr = &calldata->fattr;
c1d51931 2287 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2288 calldata->res.server = server;
1f7977c1 2289 calldata->roc = pnfs_roc(state->inode);
643168c2 2290 nfs_sb_active(calldata->inode->i_sb);
9512135d 2291
1174dd1f
TM		 2292 msg.rpc_argp = &calldata->arg;
2293 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2294 task_setup_data.callback_data = calldata;
2295 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2296 if (IS_ERR(task))
2297 return PTR_ERR(task);
a49c3c77
TM		 2298 status = 0;
2299 if (wait)
2300 status = rpc_wait_for_completion_task(task);
b39e625b 2301 rpc_put_task(task);
a49c3c77 2302 return status;
9512135d
TM		 2303out_free_calldata:
2304 kfree(calldata);
2305out:
b39e625b
TM		 2306 nfs4_put_open_state(state);
2307 nfs4_put_state_owner(sp);
9512135d 2308 return status;
1da177e4
LT		 2309}
2310
2b484297 2311static struct inode *
cd9a1c0e 2312nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2313{
1da177e4 2314 struct nfs4_state *state;
1da177e4 2315
565277f6 2316 /* Protect against concurrent sillydeletes */
82be417a
AA		 2317 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2318 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2319 if (IS_ERR(state))
2320 return ERR_CAST(state);
cd9a1c0e 2321 ctx->state = state;
f46e0bd3 2322 return igrab(state->inode);
1da177e4
LT		 2323}
2324
1185a552 2325static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2326{
2327 if (ctx->state == NULL)
2328 return;
2329 if (is_sync)
643168c2 2330 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2331 else
643168c2 2332 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2333}
1da177e4
LT		 2334
2335static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2336{
43652ad5
BH		 2337 struct nfs4_server_caps_arg args = {
2338 .fhandle = fhandle,
2339 };
1da177e4
LT		 2340 struct nfs4_server_caps_res res = {};
2341 struct rpc_message msg = {
2342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2343 .rpc_argp = &args,
1da177e4
LT		 2344 .rpc_resp = &res,
2345 };
2346 int status;
2347
7c513058 2348 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2349 if (status == 0) {
2350 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2351 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2352 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2353 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2354 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2355 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2356 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2357 server->caps |= NFS_CAP_ACLS;
2358 if (res.has_links != 0)
2359 server->caps |= NFS_CAP_HARDLINKS;
2360 if (res.has_symlinks != 0)
2361 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2362 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2363 server->caps |= NFS_CAP_FILEID;
2364 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2365 server->caps |= NFS_CAP_MODE;
2366 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2367 server->caps |= NFS_CAP_NLINK;
2368 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2369 server->caps |= NFS_CAP_OWNER;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2371 server->caps |= NFS_CAP_OWNER_GROUP;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2373 server->caps |= NFS_CAP_ATIME;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2375 server->caps |= NFS_CAP_CTIME;
2376 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2377 server->caps |= NFS_CAP_MTIME;
2378
a65318bf
TM		 2379 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2380 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2381 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2382 server->acl_bitmask = res.acl_bitmask;
264e6351 2383 server->fh_expire_type = res.fh_expire_type;
1da177e4 2384 }
cccef3b9 2385
1da177e4
LT		 2386 return status;
2387}
2388
55a97593 2389int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2390{
2391 struct nfs4_exception exception = { };
2392 int err;
2393 do {
2394 err = nfs4_handle_exception(server,
2395 _nfs4_server_capabilities(server, fhandle),
2396 &exception);
2397 } while (exception.retry);
2398 return err;
2399}
2400
2401static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2402 struct nfs_fsinfo *info)
2403{
1da177e4
LT		 2404 struct nfs4_lookup_root_arg args = {
2405 .bitmask = nfs4_fattr_bitmap,
2406 };
2407 struct nfs4_lookup_res res = {
2408 .server = server,
0e574af1 2409 .fattr = info->fattr,
1da177e4
LT		 2410 .fh = fhandle,
2411 };
2412 struct rpc_message msg = {
2413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2414 .rpc_argp = &args,
2415 .rpc_resp = &res,
2416 };
008f55d0 2417
0e574af1 2418 nfs_fattr_init(info->fattr);
7c513058 2419 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2420}
2421
2422static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2423 struct nfs_fsinfo *info)
2424{
2425 struct nfs4_exception exception = { };
2426 int err;
2427 do {
fb8a5ba8
BS		 2428 err = _nfs4_lookup_root(server, fhandle, info);
2429 switch (err) {
2430 case 0:
2431 case -NFS4ERR_WRONGSEC:
05e9cfb4 2432 goto out;
fb8a5ba8
BS		 2433 default:
2434 err = nfs4_handle_exception(server, err, &exception);
2435 }
1da177e4 2436 } while (exception.retry);
05e9cfb4 2437out:
1da177e4
LT		 2438 return err;
2439}
2440
8f70e95f
BS		 2441static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2442 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2443{
2444 struct rpc_auth *auth;
2445 int ret;
2446
2447 auth = rpcauth_create(flavor, server->client);
e8d920c5 2448 if (IS_ERR(auth)) {
8f70e95f
BS		 2449 ret = -EIO;
2450 goto out;
2451 }
2452 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2453out:
2454 return ret;
2455}
2456
801a16dc 2457static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2458 struct nfs_fsinfo *info)
1da177e4 2459{
8f70e95f 2460 int i, len, status = 0;
0fabee24 2461 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2462
6a1a1e34
CL		 2463 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2464 BUG_ON(len < 0);
8f70e95f
BS		 2465
2466 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2467 /* AUTH_UNIX is the default flavor if none was specified,
2468 * thus has already been tried. */
2469 if (flav_array[i] == RPC_AUTH_UNIX)
2470 continue;
2471
8f70e95f 2472 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2473 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2474 continue;
2475 break;
8f70e95f 2476 }
fb8a5ba8
BS		 2477 /*
2478 * -EACCESS could mean that the user doesn't have correct permissions
2479 * to access the mount. It could also mean that we tried to mount
2480 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2481 * existing mount programs don't handle -EACCES very well so it should
2482 * be mapped to -EPERM instead.
2483 */
2484 if (status == -EACCES)
2485 status = -EPERM;
801a16dc
BS		 2486 return status;
2487}
2488
2489/*
2490 * get the file handle for the "/" directory on the server
2491 */
3028eb2b
BS		 2492int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2493 struct nfs_fsinfo *info)
801a16dc 2494{
fca78d6d 2495 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2496 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2497 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2498 /*
2499 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2500 * by nfs4_map_errors() as this function exits.
2501 */
fca78d6d 2502 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2503 if (status == 0)
2504 status = nfs4_server_capabilities(server, fhandle);
2505 if (status == 0)
2506 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2507 return nfs4_map_errors(status);
1da177e4
LT		 2508}
2509
bae36241
BS		 2510static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2511 struct nfs_fsinfo *info)
2512{
2513 int error;
2514 struct nfs_fattr *fattr = info->fattr;
2515
2516 error = nfs4_server_capabilities(server, mntfh);
2517 if (error < 0) {
2518 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2519 return error;
2520 }
2521
2522 error = nfs4_proc_getattr(server, mntfh, fattr);
2523 if (error < 0) {
2524 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2525 return error;
2526 }
2527
2528 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2529 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2530 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2531
2532 return error;
2533}
2534
6b97fd3d
MN		 2535/*
2536 * Get locations and (maybe) other attributes of a referral.
2537 * Note that we'll actually follow the referral later when
2538 * we detect fsid mismatch in inode revalidation
2539 */
f05d147f
BS		 2540static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2541 const struct qstr *name, struct nfs_fattr *fattr,
2542 struct nfs_fh *fhandle)
6b97fd3d
MN		 2543{
2544 int status = -ENOMEM;
2545 struct page *page = NULL;
2546 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2547
2548 page = alloc_page(GFP_KERNEL);
2549 if (page == NULL)
2550 goto out;
2551 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2552 if (locations == NULL)
2553 goto out;
2554
f05d147f 2555 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2556 if (status != 0)
2557 goto out;
2558 /* Make sure server returned a different fsid for the referral */
2559 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2560 dprintk("%s: server did not return a different fsid for"
2561 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2562 status = -EIO;
2563 goto out;
2564 }
533eb461
AA		 2565 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2566 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2567
533eb461 2568 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2569 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2570 memset(fhandle, 0, sizeof(struct nfs_fh));
2571out:
2572 if (page)
2573 __free_page(page);
5d7ca35a 2574 kfree(locations);
6b97fd3d
MN		 2575 return status;
2576}
2577
1da177e4
LT		 2578static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2579{
2580 struct nfs4_getattr_arg args = {
2581 .fh = fhandle,
2582 .bitmask = server->attr_bitmask,
2583 };
2584 struct nfs4_getattr_res res = {
2585 .fattr = fattr,
2586 .server = server,
2587 };
2588 struct rpc_message msg = {
2589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2590 .rpc_argp = &args,
2591 .rpc_resp = &res,
2592 };
2593
0e574af1 2594 nfs_fattr_init(fattr);
7c513058 2595 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2596}
2597
2598static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2599{
2600 struct nfs4_exception exception = { };
2601 int err;
2602 do {
2603 err = nfs4_handle_exception(server,
2604 _nfs4_proc_getattr(server, fhandle, fattr),
2605 &exception);
2606 } while (exception.retry);
2607 return err;
2608}
2609
2610/*
2611 * The file is not closed if it is opened due to the a request to change
2612 * the size of the file. The open call will not be needed once the
2613 * VFS layer lookup-intents are implemented.
2614 *
2615 * Close is called when the inode is destroyed.
2616 * If we haven't opened the file for O_WRONLY, we
2617 * need to in the size_change case to obtain a stateid.
2618 *
2619 * Got race?
2620 * Because OPEN is always done by name in nfsv4, it is
2621 * possible that we opened a different file by the same
2622 * name. We can recognize this race condition, but we
2623 * can't do anything about it besides returning an error.
2624 *
2625 * This will be fixed with VFS changes (lookup-intent).
2626 */
2627static int
2628nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2629 struct iattr *sattr)
2630{
08e9eac4 2631 struct inode *inode = dentry->d_inode;
659bfcd6 2632 struct rpc_cred *cred = NULL;
d530838b 2633 struct nfs4_state *state = NULL;
1da177e4
LT		 2634 int status;
2635
8a1636c4
BH		 2636 if (pnfs_ld_layoutret_on_setattr(inode))
2637 pnfs_return_layout(inode);
2638
0e574af1 2639 nfs_fattr_init(fattr);
1da177e4 2640
2669940d
AA		 2641 /* Deal with open(O_TRUNC) */
2642 if (sattr->ia_valid & ATTR_OPEN)
2643 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2644
2645 /* Optimization: if the end result is no change, don't RPC */
2646 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2647 return 0;
2648
d530838b 2649 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2650 if (sattr->ia_valid & ATTR_FILE) {
2651 struct nfs_open_context *ctx;
2652
2653 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2654 if (ctx) {
2655 cred = ctx->cred;
2656 state = ctx->state;
2657 }
659bfcd6 2658 }
08e9eac4 2659
659bfcd6 2660 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2661 if (status == 0)
2662 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2663 return status;
2664}
2665
0c2e53f1
TM		 2666static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2667 const struct qstr *name, struct nfs_fh *fhandle,
2668 struct nfs_fattr *fattr)
2b3de441 2669{
0c2e53f1 2670 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2671 int status;
2672 struct nfs4_lookup_arg args = {
2673 .bitmask = server->attr_bitmask,
0c2e53f1 2674 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2675 .name = name,
2676 };
2677 struct nfs4_lookup_res res = {
2678 .server = server,
2679 .fattr = fattr,
2680 .fh = fhandle,
2681 };
2682 struct rpc_message msg = {
2683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2684 .rpc_argp = &args,
2685 .rpc_resp = &res,
2686 };
2687
2688 nfs_fattr_init(fattr);
2689
1da177e4 2690 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2691 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2692 dprintk("NFS reply lookup: %d\n", status);
2693 return status;
2694}
2695
72de53ec 2696static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2697{
7ebb9315 2698 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2699 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2700 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2701 fattr->nlink = 2;
2702}
2703
72de53ec
BS		 2704static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2705 struct qstr *name, struct nfs_fh *fhandle,
2706 struct nfs_fattr *fattr)
1da177e4
LT		 2707{
2708 struct nfs4_exception exception = { };
72de53ec 2709 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2710 int err;
2711 do {
72de53ec
BS		 2712 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2713 switch (err) {
08ef7bd3 2714 case -NFS4ERR_BADNAME:
72de53ec
BS		 2715 err = -ENOENT;
2716 goto out;
0c2e53f1 2717 case -NFS4ERR_MOVED:
f05d147f 2718 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2719 goto out;
0c2e53f1 2720 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2721 err = -EPERM;
2722 if (client != *clnt)
2723 goto out;
2724
2725 client = nfs4_create_sec_client(client, dir, name);
2726 if (IS_ERR(client))
2727 return PTR_ERR(client);
2728
2729 exception.retry = 1;
2730 break;
2731 default:
2732 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2733 }
1da177e4 2734 } while (exception.retry);
72de53ec
BS		 2735
2736out:
2737 if (err == 0)
2738 *clnt = client;
2739 else if (client != *clnt)
2740 rpc_shutdown_client(client);
2741
1da177e4
LT		 2742 return err;
2743}
2744
80a16b21 2745static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2746 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2747{
2748 int status;
2749 struct rpc_clnt *client = NFS_CLIENT(dir);
2750
2751 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2752 if (client != NFS_CLIENT(dir)) {
2753 rpc_shutdown_client(client);
2754 nfs_fixup_secinfo_attributes(fattr);
2755 }
2756 return status;
2757}
2758
f05d147f
BS		 2759struct rpc_clnt *
2760nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2761 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2762{
2763 int status;
2764 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2765
2766 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2767 if (status < 0) {
2768 rpc_shutdown_client(client);
2769 return ERR_PTR(status);
2770 }
2771 return client;
2772}
2773
1da177e4
LT		 2774static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2775{
76b32999 2776 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2777 struct nfs4_accessargs args = {
2778 .fh = NFS_FH(inode),
a4980e78 2779 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2780 };
2781 struct nfs4_accessres res = {
2782 .server = server,
1da177e4 2783 };
1da177e4
LT		 2784 struct rpc_message msg = {
2785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2786 .rpc_argp = &args,
2787 .rpc_resp = &res,
2788 .rpc_cred = entry->cred,
2789 };
2790 int mode = entry->mask;
2791 int status;
2792
2793 /*
2794 * Determine which access bits we want to ask for...
2795 */
2796 if (mode & MAY_READ)
2797 args.access |= NFS4_ACCESS_READ;
2798 if (S_ISDIR(inode->i_mode)) {
2799 if (mode & MAY_WRITE)
2800 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2801 if (mode & MAY_EXEC)
2802 args.access |= NFS4_ACCESS_LOOKUP;
2803 } else {
2804 if (mode & MAY_WRITE)
2805 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2806 if (mode & MAY_EXEC)
2807 args.access |= NFS4_ACCESS_EXECUTE;
2808 }
c407d41a
TM		 2809
2810 res.fattr = nfs_alloc_fattr();
2811 if (res.fattr == NULL)
2812 return -ENOMEM;
2813
7c513058 2814 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2815 if (!status) {
6168f62c 2816 nfs_access_set_mask(entry, res.access);
c407d41a 2817 nfs_refresh_inode(inode, res.fattr);
1da177e4 2818 }
c407d41a 2819 nfs_free_fattr(res.fattr);
1da177e4
LT		 2820 return status;
2821}
2822
2823static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2824{
2825 struct nfs4_exception exception = { };
2826 int err;
2827 do {
2828 err = nfs4_handle_exception(NFS_SERVER(inode),
2829 _nfs4_proc_access(inode, entry),
2830 &exception);
2831 } while (exception.retry);
2832 return err;
2833}
2834
2835/*
2836 * TODO: For the time being, we don't try to get any attributes
2837 * along with any of the zero-copy operations READ, READDIR,
2838 * READLINK, WRITE.
2839 *
2840 * In the case of the first three, we want to put the GETATTR
2841 * after the read-type operation -- this is because it is hard
2842 * to predict the length of a GETATTR response in v4, and thus
2843 * align the READ data correctly. This means that the GETATTR
2844 * may end up partially falling into the page cache, and we should
2845 * shift it into the 'tail' of the xdr_buf before processing.
2846 * To do this efficiently, we need to know the total length
2847 * of data received, which doesn't seem to be available outside
2848 * of the RPC layer.
2849 *
2850 * In the case of WRITE, we also want to put the GETATTR after
2851 * the operation -- in this case because we want to make sure
140150db 2852 * we get the post-operation mtime and size.
1da177e4
LT		 2853 *
2854 * Both of these changes to the XDR layer would in fact be quite
2855 * minor, but I decided to leave them for a subsequent patch.
2856 */
2857static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2858 unsigned int pgbase, unsigned int pglen)
2859{
2860 struct nfs4_readlink args = {
2861 .fh = NFS_FH(inode),
2862 .pgbase = pgbase,
2863 .pglen = pglen,
2864 .pages = &page,
2865 };
f50c7000 2866 struct nfs4_readlink_res res;
1da177e4
LT		 2867 struct rpc_message msg = {
2868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2869 .rpc_argp = &args,
f50c7000 2870 .rpc_resp = &res,
1da177e4
LT		 2871 };
2872
7c513058 2873 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2874}
2875
2876static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2877 unsigned int pgbase, unsigned int pglen)
2878{
2879 struct nfs4_exception exception = { };
2880 int err;
2881 do {
2882 err = nfs4_handle_exception(NFS_SERVER(inode),
2883 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2884 &exception);
2885 } while (exception.retry);
2886 return err;
2887}
2888
1da177e4 2889/*
8867fe58 2890 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2891 */
1da177e4
LT		 2892static int
2893nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2894 int flags)
1da177e4 2895{
8867fe58 2896 struct nfs_open_context *ctx;
1da177e4 2897 struct nfs4_state *state;
1da177e4
LT		 2898 int status = 0;
2899
8867fe58
MS		 2900 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2901 if (IS_ERR(ctx))
2902 return PTR_ERR(ctx);
2903
a8a5da99 2904 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2905 state = nfs4_do_open(dir, dentry, ctx->mode,
2906 flags, sattr, ctx->cred,
2907 &ctx->mdsthreshold);
d4d9cdcb 2908 d_drop(dentry);
1da177e4
LT		 2909 if (IS_ERR(state)) {
2910 status = PTR_ERR(state);
c0204fd2 2911 goto out;
1da177e4 2912 }
d4d9cdcb 2913 d_add(dentry, igrab(state->inode));
d75340cc 2914 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2915 ctx->state = state;
1da177e4 2916out:
8867fe58 2917 put_nfs_open_context(ctx);
1da177e4
LT		 2918 return status;
2919}
2920
2921static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2922{
16e42959 2923 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2924 struct nfs_removeargs args = {
1da177e4 2925 .fh = NFS_FH(dir),
26fe5750 2926 .name = *name,
16e42959 2927 };
4fdc17b2 2928 struct nfs_removeres res = {
16e42959 2929 .server = server,
1da177e4 2930 };
1da177e4 2931 struct rpc_message msg = {
4fdc17b2
TM		 2932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2933 .rpc_argp = &args,
2934 .rpc_resp = &res,
1da177e4 2935 };
778d2817 2936 int status;
1da177e4 2937
7c513058 2938 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2939 if (status == 0)
16e42959 2940 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2941 return status;
2942}
2943
2944static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2945{
2946 struct nfs4_exception exception = { };
2947 int err;
2948 do {
2949 err = nfs4_handle_exception(NFS_SERVER(dir),
2950 _nfs4_proc_remove(dir, name),
2951 &exception);
2952 } while (exception.retry);
2953 return err;
2954}
2955
e4eff1a6 2956static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2957{
e4eff1a6
TM		 2958 struct nfs_server *server = NFS_SERVER(dir);
2959 struct nfs_removeargs *args = msg->rpc_argp;
2960 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2961
e4eff1a6 2962 res->server = server;
1da177e4 2963 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2964 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2965}
2966
34e137cc
BS		 2967static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2968{
2969 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2970 &data->args.seq_args,
2971 &data->res.seq_res,
2972 task))
2973 return;
2974 rpc_call_start(task);
1da177e4
LT		 2975}
2976
e4eff1a6 2977static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2978{
e4eff1a6
TM		 2979 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2980
14516c3a
TM		 2981 if (!nfs4_sequence_done(task, &res->seq_res))
2982 return 0;
9e33bed5 2983 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2984 return 0;
2985 update_changeattr(dir, &res->cinfo);
e4eff1a6 2986 return 1;
1da177e4
LT		 2987}
2988
d3d4152a
JL		 2989static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2990{
2991 struct nfs_server *server = NFS_SERVER(dir);
2992 struct nfs_renameargs *arg = msg->rpc_argp;
2993 struct nfs_renameres *res = msg->rpc_resp;
2994
2995 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2996 res->server = server;
9d12b216 2997 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2998}
2999
c6bfa1a1
BS		 3000static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3001{
3002 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3003 &data->args.seq_args,
3004 &data->res.seq_res,
3005 task))
3006 return;
3007 rpc_call_start(task);
d3d4152a
JL		 3008}
3009
3010static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3011 struct inode *new_dir)
3012{
3013 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3014
3015 if (!nfs4_sequence_done(task, &res->seq_res))
3016 return 0;
3017 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3018 return 0;
3019
3020 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3021 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3022 return 1;
3023}
3024
1da177e4
LT		 3025static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3026 struct inode *new_dir, struct qstr *new_name)
3027{
6caf2c82 3028 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3029 struct nfs_renameargs arg = {
1da177e4
LT		 3030 .old_dir = NFS_FH(old_dir),
3031 .new_dir = NFS_FH(new_dir),
3032 .old_name = old_name,
3033 .new_name = new_name,
6caf2c82 3034 };
e8582a8b 3035 struct nfs_renameres res = {
6caf2c82 3036 .server = server,
1da177e4 3037 };
1da177e4
LT		 3038 struct rpc_message msg = {
3039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3040 .rpc_argp = &arg,
3041 .rpc_resp = &res,
3042 };
011fff72 3043 int status = -ENOMEM;
1da177e4 3044
7c513058 3045 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3046 if (!status) {
3047 update_changeattr(old_dir, &res.old_cinfo);
3048 update_changeattr(new_dir, &res.new_cinfo);
3049 }
3050 return status;
3051}
3052
3053static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3054 struct inode *new_dir, struct qstr *new_name)
3055{
3056 struct nfs4_exception exception = { };
3057 int err;
3058 do {
3059 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3060 _nfs4_proc_rename(old_dir, old_name,
3061 new_dir, new_name),
3062 &exception);
3063 } while (exception.retry);
3064 return err;
3065}
3066
3067static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3068{
91ba2eee 3069 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3070 struct nfs4_link_arg arg = {
3071 .fh = NFS_FH(inode),
3072 .dir_fh = NFS_FH(dir),
3073 .name = name,
91ba2eee
TM		 3074 .bitmask = server->attr_bitmask,
3075 };
91ba2eee
TM		 3076 struct nfs4_link_res res = {
3077 .server = server,
1da177e4 3078 };
1da177e4
LT		 3079 struct rpc_message msg = {
3080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3081 .rpc_argp = &arg,
91ba2eee 3082 .rpc_resp = &res,
1da177e4 3083 };
136f2627
TM		 3084 int status = -ENOMEM;
3085
3086 res.fattr = nfs_alloc_fattr();
778d2817 3087 if (res.fattr == NULL)
136f2627 3088 goto out;
1da177e4 3089
7c513058 3090 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3091 if (!status) {
3092 update_changeattr(dir, &res.cinfo);
73a3d07c 3093 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3094 }
136f2627 3095out:
136f2627 3096 nfs_free_fattr(res.fattr);
1da177e4
LT		 3097 return status;
3098}
3099
3100static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3101{
3102 struct nfs4_exception exception = { };
3103 int err;
3104 do {
3105 err = nfs4_handle_exception(NFS_SERVER(inode),
3106 _nfs4_proc_link(inode, dir, name),
3107 &exception);
3108 } while (exception.retry);
3109 return err;
3110}
3111
57dc9a57
TM		 3112struct nfs4_createdata {
3113 struct rpc_message msg;
3114 struct nfs4_create_arg arg;
3115 struct nfs4_create_res res;
3116 struct nfs_fh fh;
3117 struct nfs_fattr fattr;
57dc9a57
TM		 3118};
3119
3120static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3121 struct qstr *name, struct iattr *sattr, u32 ftype)
3122{
3123 struct nfs4_createdata *data;
3124
3125 data = kzalloc(sizeof(*data), GFP_KERNEL);
3126 if (data != NULL) {
3127 struct nfs_server *server = NFS_SERVER(dir);
3128
3129 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3130 data->msg.rpc_argp = &data->arg;
3131 data->msg.rpc_resp = &data->res;
3132 data->arg.dir_fh = NFS_FH(dir);
3133 data->arg.server = server;
3134 data->arg.name = name;
3135 data->arg.attrs = sattr;
3136 data->arg.ftype = ftype;
3137 data->arg.bitmask = server->attr_bitmask;
3138 data->res.server = server;
3139 data->res.fh = &data->fh;
3140 data->res.fattr = &data->fattr;
57dc9a57 3141 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3142 }
3143 return data;
3144}
3145
3146static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3147{
7c513058 3148 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3149 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3150 if (status == 0) {
3151 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3152 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3153 }
3154 return status;
3155}
3156
3157static void nfs4_free_createdata(struct nfs4_createdata *data)
3158{
3159 kfree(data);
3160}
3161
4f390c15 3162static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3163 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3164{
57dc9a57
TM		 3165 struct nfs4_createdata *data;
3166 int status = -ENAMETOOLONG;
1da177e4 3167
94a6d753 3168 if (len > NFS4_MAXPATHLEN)
57dc9a57 3169 goto out;
4f390c15 3170
57dc9a57
TM		 3171 status = -ENOMEM;
3172 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3173 if (data == NULL)
3174 goto out;
3175
3176 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3177 data->arg.u.symlink.pages = &page;
3178 data->arg.u.symlink.len = len;
1da177e4 3179
57dc9a57
TM		 3180 status = nfs4_do_create(dir, dentry, data);
3181
3182 nfs4_free_createdata(data);
3183out:
1da177e4
LT		 3184 return status;
3185}
3186
4f390c15 3187static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3188 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3189{
3190 struct nfs4_exception exception = { };
3191 int err;
3192 do {
3193 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3194 _nfs4_proc_symlink(dir, dentry, page,
3195 len, sattr),
1da177e4
LT		 3196 &exception);
3197 } while (exception.retry);
3198 return err;
3199}
3200
3201static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3202 struct iattr *sattr)
3203{
57dc9a57
TM		 3204 struct nfs4_createdata *data;
3205 int status = -ENOMEM;
1da177e4 3206
57dc9a57
TM		 3207 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3208 if (data == NULL)
3209 goto out;
3210
3211 status = nfs4_do_create(dir, dentry, data);
3212
3213 nfs4_free_createdata(data);
3214out:
1da177e4
LT		 3215 return status;
3216}
3217
3218static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3219 struct iattr *sattr)
3220{
3221 struct nfs4_exception exception = { };
3222 int err;
a8a5da99
AK		 3223
3224 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3225 do {
3226 err = nfs4_handle_exception(NFS_SERVER(dir),
3227 _nfs4_proc_mkdir(dir, dentry, sattr),
3228 &exception);
3229 } while (exception.retry);
3230 return err;
3231}
3232
3233static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3234 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3235{
3236 struct inode *dir = dentry->d_inode;
3237 struct nfs4_readdir_arg args = {
3238 .fh = NFS_FH(dir),
56e4ebf8 3239 .pages = pages,
1da177e4
LT		 3240 .pgbase = 0,
3241 .count = count,
96d25e53 3242 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3243 .plus = plus,
1da177e4
LT		 3244 };
3245 struct nfs4_readdir_res res;
3246 struct rpc_message msg = {
3247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3248 .rpc_argp = &args,
3249 .rpc_resp = &res,
3250 .rpc_cred = cred,
3251 };
3252 int status;
3253
3110ff80 3254 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3255 dentry->d_parent->d_name.name,
3256 dentry->d_name.name,
3257 (unsigned long long)cookie);
c3f52af3 3258 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3259 res.pgbase = args.pgbase;
7c513058 3260 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3261 if (status >= 0) {
c3f52af3 3262 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3263 status += args.pgbase;
3264 }
c4812998
TM		 3265
3266 nfs_invalidate_atime(dir);
3267
3110ff80 3268 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3269 return status;
3270}
3271
3272static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3273 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3274{
3275 struct nfs4_exception exception = { };
3276 int err;
3277 do {
3278 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3279 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3280 pages, count, plus),
1da177e4
LT		 3281 &exception);
3282 } while (exception.retry);
3283 return err;
3284}
3285
3286static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3287 struct iattr *sattr, dev_t rdev)
3288{
57dc9a57
TM		 3289 struct nfs4_createdata *data;
3290 int mode = sattr->ia_mode;
3291 int status = -ENOMEM;
1da177e4
LT		 3292
3293 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3294 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3295
3296 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3297 if (data == NULL)
3298 goto out;
3299
1da177e4 3300 if (S_ISFIFO(mode))
57dc9a57 3301 data->arg.ftype = NF4FIFO;
1da177e4 3302 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3303 data->arg.ftype = NF4BLK;
3304 data->arg.u.device.specdata1 = MAJOR(rdev);
3305 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3306 }
3307 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3308 data->arg.ftype = NF4CHR;
3309 data->arg.u.device.specdata1 = MAJOR(rdev);
3310 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3311 }
1da177e4 3312
57dc9a57
TM		 3313 status = nfs4_do_create(dir, dentry, data);
3314
3315 nfs4_free_createdata(data);
3316out:
1da177e4
LT		 3317 return status;
3318}
3319
3320static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3321 struct iattr *sattr, dev_t rdev)
3322{
3323 struct nfs4_exception exception = { };
3324 int err;
a8a5da99
AK		 3325
3326 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3327 do {
3328 err = nfs4_handle_exception(NFS_SERVER(dir),
3329 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3330 &exception);
3331 } while (exception.retry);
3332 return err;
3333}
3334
3335static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3336 struct nfs_fsstat *fsstat)
3337{
3338 struct nfs4_statfs_arg args = {
3339 .fh = fhandle,
3340 .bitmask = server->attr_bitmask,
3341 };
24ad148a
BH		 3342 struct nfs4_statfs_res res = {
3343 .fsstat = fsstat,
3344 };
1da177e4
LT		 3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3347 .rpc_argp = &args,
24ad148a 3348 .rpc_resp = &res,
1da177e4
LT		 3349 };
3350
0e574af1 3351 nfs_fattr_init(fsstat->fattr);
7c513058 3352 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3353}
3354
3355static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3356{
3357 struct nfs4_exception exception = { };
3358 int err;
3359 do {
3360 err = nfs4_handle_exception(server,
3361 _nfs4_proc_statfs(server, fhandle, fsstat),
3362 &exception);
3363 } while (exception.retry);
3364 return err;
3365}
3366
3367static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3368 struct nfs_fsinfo *fsinfo)
3369{
3370 struct nfs4_fsinfo_arg args = {
3371 .fh = fhandle,
3372 .bitmask = server->attr_bitmask,
3373 };
3dda5e43
BH		 3374 struct nfs4_fsinfo_res res = {
3375 .fsinfo = fsinfo,
3376 };
1da177e4
LT		 3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3379 .rpc_argp = &args,
3dda5e43 3380 .rpc_resp = &res,
1da177e4
LT		 3381 };
3382
7c513058 3383 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3384}
3385
3386static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3387{
3388 struct nfs4_exception exception = { };
3389 int err;
3390
3391 do {
3392 err = nfs4_handle_exception(server,
3393 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3394 &exception);
3395 } while (exception.retry);
3396 return err;
3397}
3398
3399static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3400{
e38eb650
BS		 3401 int error;
3402
0e574af1 3403 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3404 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3405 if (error == 0)
3406 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3407
3408 return error;
1da177e4
LT		 3409}
3410
3411static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3412 struct nfs_pathconf *pathconf)
3413{
3414 struct nfs4_pathconf_arg args = {
3415 .fh = fhandle,
3416 .bitmask = server->attr_bitmask,
3417 };
d45b2989
BH		 3418 struct nfs4_pathconf_res res = {
3419 .pathconf = pathconf,
3420 };
1da177e4
LT		 3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3423 .rpc_argp = &args,
d45b2989 3424 .rpc_resp = &res,
1da177e4
LT		 3425 };
3426
3427 /* None of the pathconf attributes are mandatory to implement */
3428 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3429 memset(pathconf, 0, sizeof(*pathconf));
3430 return 0;
3431 }
3432
0e574af1 3433 nfs_fattr_init(pathconf->fattr);
7c513058 3434 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3435}
3436
3437static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3438 struct nfs_pathconf *pathconf)
3439{
3440 struct nfs4_exception exception = { };
3441 int err;
3442
3443 do {
3444 err = nfs4_handle_exception(server,
3445 _nfs4_proc_pathconf(server, fhandle, pathconf),
3446 &exception);
3447 } while (exception.retry);
3448 return err;
3449}
3450
d20581aa
BH		 3451void __nfs4_read_done_cb(struct nfs_read_data *data)
3452{
cd841605 3453 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3454}
3455
cbdabc7f 3456static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3457{
cd841605 3458 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3459
9e33bed5 3460 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3461 rpc_restart_call_prepare(task);
ec06c096 3462 return -EAGAIN;
1da177e4 3463 }
8850df99 3464
d20581aa 3465 __nfs4_read_done_cb(data);
1da177e4 3466 if (task->tk_status > 0)
ec06c096
TM		 3467 renew_lease(server, data->timestamp);
3468 return 0;
1da177e4
LT		 3469}
3470
cbdabc7f
AA		 3471static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3472{
3473
3474 dprintk("--> %s\n", __func__);
3475
3476 if (!nfs4_sequence_done(task, &data->res.seq_res))
3477 return -EAGAIN;
3478
d20581aa
BH		 3479 return data->read_done_cb ? data->read_done_cb(task, data) :
3480 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3481}
3482
bdc7f021 3483static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3484{
1da177e4 3485 data->timestamp = jiffies;
cbdabc7f 3486 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3487 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3488 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3489}
3490
ea7c3303
BS		 3491static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3492{
cd841605 3493 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3494 &data->args.seq_args,
3495 &data->res.seq_res,
3496 task))
3497 return;
3498 rpc_call_start(task);
1da177e4
LT		 3499}
3500
b029bc9b 3501static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3502{
cd841605 3503 struct inode *inode = data->header->inode;
1da177e4 3504
9e33bed5 3505 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3506 rpc_restart_call_prepare(task);
788e7a89 3507 return -EAGAIN;
1da177e4 3508 }
4f9838c7 3509 if (task->tk_status >= 0) {
1da177e4 3510 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3511 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3512 }
788e7a89 3513 return 0;
1da177e4
LT		 3514}
3515
b029bc9b
FI		 3516static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3517{
3518 if (!nfs4_sequence_done(task, &data->res.seq_res))
3519 return -EAGAIN;
d20581aa
BH		 3520 return data->write_done_cb ? data->write_done_cb(task, data) :
3521 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3522}
3523
5a37f851
TM		 3524static
3525bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3526{
5a37f851
TM		 3527 const struct nfs_pgio_header *hdr = data->header;
3528
3529 /* Don't request attributes for pNFS or O_DIRECT writes */
3530 if (data->ds_clp != NULL || hdr->dreq != NULL)
3531 return false;
3532 /* Otherwise, request attributes if and only if we don't hold
3533 * a delegation
3534 */
011e2a7f 3535 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3536}
a69aef14 3537
bdc7f021 3538static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3539{
cd841605 3540 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3541
5a37f851 3542 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3543 data->args.bitmask = NULL;
3544 data->res.fattr = NULL;
3545 } else
3546 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3547
b029bc9b
FI		 3548 if (!data->write_done_cb)
3549 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3550 data->res.server = server;
1da177e4
LT		 3551 data->timestamp = jiffies;
3552
bdc7f021 3553 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3554 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3555}
3556
c6cb80d0
BS		 3557static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3558{
cd841605 3559 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3560 &data->args.seq_args,
3561 &data->res.seq_res,
3562 task))
3563 return;
3564 rpc_call_start(task);
1da177e4
LT		 3565}
3566
0b7c0153 3567static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3568{
3569 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3570 &data->args.seq_args,
3571 &data->res.seq_res,
3572 task))
3573 return;
3574 rpc_call_start(task);
1da177e4
LT		 3575}
3576
0b7c0153 3577static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3578{
1da177e4 3579 struct inode *inode = data->inode;
14516c3a 3580
9e33bed5 3581 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3582 rpc_restart_call_prepare(task);
788e7a89 3583 return -EAGAIN;
1da177e4 3584 }
788e7a89 3585 return 0;
1da177e4
LT		 3586}
3587
0b7c0153 3588static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3589{
3590 if (!nfs4_sequence_done(task, &data->res.seq_res))
3591 return -EAGAIN;
0b7c0153 3592 return data->commit_done_cb(task, data);
5f452431
FI		 3593}
3594
0b7c0153 3595static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3596{
788e7a89 3597 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3598
0b7c0153
FI		 3599 if (data->commit_done_cb == NULL)
3600 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3601 data->res.server = server;
bdc7f021 3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3603 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3604}
3605
9bc4e3ca
CL		 3606struct nfs4_renewdata {
3607 struct nfs_client *client;
3608 unsigned long timestamp;
3609};
3610
1da177e4
LT		 3611/*
3612 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3613 * standalone procedure for queueing an asynchronous RENEW.
3614 */
9bc4e3ca 3615static void nfs4_renew_release(void *calldata)
dc96aef9 3616{
9bc4e3ca
CL		 3617 struct nfs4_renewdata *data = calldata;
3618 struct nfs_client *clp = data->client;
dc96aef9 3619
0851de06
AB		 3620 if (atomic_read(&clp->cl_count) > 1)
3621 nfs4_schedule_state_renewal(clp);
3622 nfs_put_client(clp);
9bc4e3ca 3623 kfree(data);
dc96aef9
AB		 3624}
3625
9bc4e3ca 3626static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3627{
9bc4e3ca
CL		 3628 struct nfs4_renewdata *data = calldata;
3629 struct nfs_client *clp = data->client;
3630 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3631
3632 if (task->tk_status < 0) {
95baa25c 3633 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3634 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3635 return;
3636 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3637 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3638 return;
3639 }
3640 nfs4_schedule_path_down_recovery(clp);
1da177e4 3641 }
452e9352 3642 do_renew_lease(clp, timestamp);
1da177e4
LT		 3643}
3644
963d8fe5
TM		 3645static const struct rpc_call_ops nfs4_renew_ops = {
3646 .rpc_call_done = nfs4_renew_done,
dc96aef9 3647 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3648};
3649
2f60ea6b 3650static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3651{
3652 struct rpc_message msg = {
3653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3654 .rpc_argp = clp,
b4454fe1 3655 .rpc_cred = cred,
1da177e4 3656 };
9bc4e3ca 3657 struct nfs4_renewdata *data;
1da177e4 3658
2f60ea6b
TM		 3659 if (renew_flags == 0)
3660 return 0;
0851de06
AB		 3661 if (!atomic_inc_not_zero(&clp->cl_count))
3662 return -EIO;
b569ad34 3663 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3664 if (data == NULL)
3665 return -ENOMEM;
3666 data->client = clp;
3667 data->timestamp = jiffies;
1da177e4 3668 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3669 &nfs4_renew_ops, data);
1da177e4
LT		 3670}
3671
8534d4ec 3672static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3673{
3674 struct rpc_message msg = {
3675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3676 .rpc_argp = clp,
b4454fe1 3677 .rpc_cred = cred,
1da177e4
LT		 3678 };
3679 unsigned long now = jiffies;
3680 int status;
3681
3682 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3683 if (status < 0)
3684 return status;
452e9352 3685 do_renew_lease(clp, now);
1da177e4
LT		 3686 return 0;
3687}
3688
aa1870af
BF		 3689static inline int nfs4_server_supports_acls(struct nfs_server *server)
3690{
3691 return (server->caps & NFS_CAP_ACLS)
3692 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3693 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3694}
3695
21f498c2
TM		 3696/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3697 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3698 * the stack.
3699 */
21f498c2 3700#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3701
e9e3d724
NH		 3702static int buf_to_pages_noslab(const void *buf, size_t buflen,
3703 struct page **pages, unsigned int *pgbase)
3704{
3705 struct page *newpage, **spages;
3706 int rc = 0;
3707 size_t len;
3708 spages = pages;
3709
3710 do {
21f498c2 3711 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3712 newpage = alloc_page(GFP_KERNEL);
3713
3714 if (newpage == NULL)
3715 goto unwind;
3716 memcpy(page_address(newpage), buf, len);
3717 buf += len;
3718 buflen -= len;
3719 *pages++ = newpage;
3720 rc++;
3721 } while (buflen != 0);
3722
3723 return rc;
3724
3725unwind:
3726 for(; rc > 0; rc--)
3727 __free_page(spages[rc-1]);
3728 return -ENOMEM;
3729}
3730
e50a1c2e
BF		 3731struct nfs4_cached_acl {
3732 int cached;
3733 size_t len;
3e9d4154 3734 char data[0];
e50a1c2e
BF		 3735};
3736
3737static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3738{
3739 struct nfs_inode *nfsi = NFS_I(inode);
3740
3741 spin_lock(&inode->i_lock);
3742 kfree(nfsi->nfs4_acl);
3743 nfsi->nfs4_acl = acl;
3744 spin_unlock(&inode->i_lock);
3745}
3746
3747static void nfs4_zap_acl_attr(struct inode *inode)
3748{
3749 nfs4_set_cached_acl(inode, NULL);
3750}
3751
3752static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3753{
3754 struct nfs_inode *nfsi = NFS_I(inode);
3755 struct nfs4_cached_acl *acl;
3756 int ret = -ENOENT;
3757
3758 spin_lock(&inode->i_lock);
3759 acl = nfsi->nfs4_acl;
3760 if (acl == NULL)
3761 goto out;
3762 if (buf == NULL) /* user is just asking for length */
3763 goto out_len;
3764 if (acl->cached == 0)
3765 goto out;
3766 ret = -ERANGE; /* see getxattr(2) man page */
3767 if (acl->len > buflen)
3768 goto out;
3769 memcpy(buf, acl->data, acl->len);
3770out_len:
3771 ret = acl->len;
3772out:
3773 spin_unlock(&inode->i_lock);
3774 return ret;
3775}
3776
5794d21e 3777static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3778{
3779 struct nfs4_cached_acl *acl;
b291f1b1 3780 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3781
1f1ea6c2 3782 if (buflen <= PAGE_SIZE) {
b291f1b1 3783 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3784 if (acl == NULL)
3785 goto out;
3786 acl->cached = 1;
5794d21e 3787 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3788 } else {
3789 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3790 if (acl == NULL)
3791 goto out;
3792 acl->cached = 0;
3793 }
3794 acl->len = acl_len;
3795out:
3796 nfs4_set_cached_acl(inode, acl);
3797}
3798
bf118a34
AA		 3799/*
3800 * The getxattr API returns the required buffer length when called with a
3801 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3802 * the required buf. On a NULL buf, we send a page of data to the server
3803 * guessing that the ACL request can be serviced by a page. If so, we cache
3804 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3805 * the cache. If not so, we throw away the page, and cache the required
3806 * length. The next getxattr call will then produce another round trip to
3807 * the server, this time with the input buf of the required size.
3808 */
16b4289c 3809static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3810{
bf118a34 3811 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3812 struct nfs_getaclargs args = {
3813 .fh = NFS_FH(inode),
3814 .acl_pages = pages,
3815 .acl_len = buflen,
3816 };
663c79b3
BH		 3817 struct nfs_getaclres res = {
3818 .acl_len = buflen,
3819 };
aa1870af
BF		 3820 struct rpc_message msg = {
3821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3822 .rpc_argp = &args,
663c79b3 3823 .rpc_resp = &res,
aa1870af 3824 };
21f498c2
TM		 3825 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3826 int ret = -ENOMEM, i;
aa1870af 3827
bf118a34
AA		 3828 /* As long as we're doing a round trip to the server anyway,
3829 * let's be prepared for a page of acl data. */
3830 if (npages == 0)
3831 npages = 1;
21f498c2
TM		 3832 if (npages > ARRAY_SIZE(pages))
3833 return -ERANGE;
5a006899 3834
bf118a34
AA		 3835 for (i = 0; i < npages; i++) {
3836 pages[i] = alloc_page(GFP_KERNEL);
3837 if (!pages[i])
3838 goto out_free;
e50a1c2e 3839 }
5a006899
SP		 3840
3841 /* for decoding across pages */
3842 res.acl_scratch = alloc_page(GFP_KERNEL);
3843 if (!res.acl_scratch)
3844 goto out_free;
3845
bf118a34
AA		 3846 args.acl_len = npages * PAGE_SIZE;
3847 args.acl_pgbase = 0;
5a006899 3848
de040bec 3849 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3850 __func__, buf, buflen, npages, args.acl_len);
3851 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3852 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3853 if (ret)
3854 goto out_free;
bf118a34 3855
1f1ea6c2
TM		 3856 /* Handle the case where the passed-in buffer is too short */
3857 if (res.acl_flags & NFS4_ACL_TRUNC) {
3858 /* Did the user only issue a request for the acl length? */
3859 if (buf == NULL)
3860 goto out_ok;
e50a1c2e 3861 ret = -ERANGE;
1f1ea6c2 3862 goto out_free;
e50a1c2e 3863 }
1f1ea6c2
TM		 3864 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3865 if (buf)
3866 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3867out_ok:
3868 ret = res.acl_len;
e50a1c2e 3869out_free:
bf118a34
AA		 3870 for (i = 0; i < npages; i++)
3871 if (pages[i])
3872 __free_page(pages[i]);
331818f1
TM		 3873 if (res.acl_scratch)
3874 __free_page(res.acl_scratch);
aa1870af
BF		 3875 return ret;
3876}
3877
16b4289c
TM		 3878static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3879{
3880 struct nfs4_exception exception = { };
3881 ssize_t ret;
3882 do {
3883 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3884 if (ret >= 0)
3885 break;
3886 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3887 } while (exception.retry);
3888 return ret;
3889}
3890
e50a1c2e
BF		 3891static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3892{
3893 struct nfs_server *server = NFS_SERVER(inode);
3894 int ret;
3895
3896 if (!nfs4_server_supports_acls(server))
3897 return -EOPNOTSUPP;
3898 ret = nfs_revalidate_inode(server, inode);
3899 if (ret < 0)
3900 return ret;
08a22b39
AK		 3901 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3902 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3903 ret = nfs4_read_cached_acl(inode, buf, buflen);
3904 if (ret != -ENOENT)
bf118a34
AA		 3905 /* -ENOENT is returned if there is no ACL or if there is an ACL
3906 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3907 return ret;
3908 return nfs4_get_acl_uncached(inode, buf, buflen);
3909}
3910
16b4289c 3911static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3912{
3913 struct nfs_server *server = NFS_SERVER(inode);
3914 struct page *pages[NFS4ACL_MAXPAGES];
3915 struct nfs_setaclargs arg = {
3916 .fh = NFS_FH(inode),
3917 .acl_pages = pages,
3918 .acl_len = buflen,
3919 };
73c403a9 3920 struct nfs_setaclres res;
4b580ee3
BF		 3921 struct rpc_message msg = {
3922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3923 .rpc_argp = &arg,
73c403a9 3924 .rpc_resp = &res,
4b580ee3 3925 };
21f498c2 3926 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3927 int ret, i;
4b580ee3
BF		 3928
3929 if (!nfs4_server_supports_acls(server))
3930 return -EOPNOTSUPP;
21f498c2
TM		 3931 if (npages > ARRAY_SIZE(pages))
3932 return -ERANGE;
e9e3d724
NH		 3933 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3934 if (i < 0)
3935 return i;
57ec14c5 3936 nfs4_inode_return_delegation(inode);
7c513058 3937 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3938
3939 /*
3940 * Free each page after tx, so the only ref left is
3941 * held by the network stack
3942 */
3943 for (; i > 0; i--)
3944 put_page(pages[i-1]);
3945
08a22b39
AK		 3946 /*
3947 * Acl update can result in inode attribute update.
3948 * so mark the attribute cache invalid.
3949 */
3950 spin_lock(&inode->i_lock);
3951 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3952 spin_unlock(&inode->i_lock);
f41f7418
TM		 3953 nfs_access_zap_cache(inode);
3954 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3955 return ret;
3956}
3957
16b4289c
TM		 3958static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3959{
3960 struct nfs4_exception exception = { };
3961 int err;
3962 do {
3963 err = nfs4_handle_exception(NFS_SERVER(inode),
3964 __nfs4_proc_set_acl(inode, buf, buflen),
3965 &exception);
3966 } while (exception.retry);
3967 return err;
3968}
3969
1da177e4 3970static int
aa5190d0 3971nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3972{
aa5190d0
TM		 3973 struct nfs_client *clp = server->nfs_client;
3974
3975 if (task->tk_status >= 0)
1da177e4
LT		 3976 return 0;
3977 switch(task->tk_status) {
a1d0b5ee 3978 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3979 case -NFS4ERR_ADMIN_REVOKED:
3980 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3981 if (state == NULL)
3982 break;
3983 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3984 case -NFS4ERR_OPENMODE:
3985 if (state == NULL)
3986 break;
0400a6b0
TM		 3987 nfs4_schedule_stateid_recovery(server, state);
3988 goto wait_on_recovery;
0ced63d1
TM		 3989 case -NFS4ERR_EXPIRED:
3990 if (state != NULL)
3991 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3992 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3993 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3994 nfs4_schedule_lease_recovery(clp);
3995 goto wait_on_recovery;
4745e315
AA		 3996#if defined(CONFIG_NFS_V4_1)
3997 case -NFS4ERR_BADSESSION:
3998 case -NFS4ERR_BADSLOT:
3999 case -NFS4ERR_BAD_HIGH_SLOT:
4000 case -NFS4ERR_DEADSESSION:
4001 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4002 case -NFS4ERR_SEQ_FALSE_RETRY:
4003 case -NFS4ERR_SEQ_MISORDERED:
4004 dprintk("%s ERROR %d, Reset session\n", __func__,
4005 task->tk_status);
9f594791 4006 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4007 task->tk_status = 0;
4008 return -EAGAIN;
4009#endif /* CONFIG_NFS_V4_1 */
1da177e4 4010 case -NFS4ERR_DELAY:
aa5190d0 4011 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4012 case -NFS4ERR_GRACE:
2c643488 4013 case -EKEYEXPIRED:
1da177e4
LT		 4014 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4015 task->tk_status = 0;
4016 return -EAGAIN;
a8a4ae3a 4017 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4018 case -NFS4ERR_OLD_STATEID:
4019 task->tk_status = 0;
4020 return -EAGAIN;
4021 }
4022 task->tk_status = nfs4_map_errors(task->tk_status);
4023 return 0;
0400a6b0 4024wait_on_recovery:
a2c0b9e2 4025 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4026 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4027 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4028 task->tk_status = 0;
4029 return -EAGAIN;
1da177e4
LT		 4030}
4031
f092075d
CL		 4032static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4033 nfs4_verifier *bootverf)
cd93710e
CL		 4034{
4035 __be32 verf[2];
4036
2c820d9a
CL		 4037 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4038 /* An impossible timestamp guarantees this value
4039 * will never match a generated boot time. */
4040 verf[0] = 0;
4041 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4042 } else {
f092075d
CL		 4043 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4044 verf[0] = (__be32)nn->boot_time.tv_sec;
4045 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4046 }
cd93710e
CL		 4047 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4048}
4049
6bbb4ae8
CL		 4050/**
4051 * nfs4_proc_setclientid - Negotiate client ID
4052 * @clp: state data structure
4053 * @program: RPC program for NFSv4 callback service
4054 * @port: IP port number for NFS4 callback service
4055 * @cred: RPC credential to use for this call
4056 * @res: where to place the result
4057 *
4058 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4059 */
bb8b27e5
TM		 4060int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4061 unsigned short port, struct rpc_cred *cred,
4062 struct nfs4_setclientid_res *res)
1da177e4
LT		 4063{
4064 nfs4_verifier sc_verifier;
4065 struct nfs4_setclientid setclientid = {
4066 .sc_verifier = &sc_verifier,
4067 .sc_prog = program,
f4eecd5d 4068 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4069 };
4070 struct rpc_message msg = {
4071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4072 .rpc_argp = &setclientid,
bb8b27e5 4073 .rpc_resp = res,
286d7d6a 4074 .rpc_cred = cred,
1da177e4 4075 };
6bbb4ae8 4076 int status;
1da177e4 4077
de734831 4078 /* nfs_client_id4 */
f092075d 4079 nfs4_init_boot_verifier(clp, &sc_verifier);
de734831
CL		 4080 rcu_read_lock();
4081 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4082 sizeof(setclientid.sc_name), "%s/%s %s",
4083 clp->cl_ipaddr,
4084 rpc_peeraddr2str(clp->cl_rpcclient,
4085 RPC_DISPLAY_ADDR),
4086 rpc_peeraddr2str(clp->cl_rpcclient,
4087 RPC_DISPLAY_PROTO));
4088 /* cb_client4 */
4089 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4090 sizeof(setclientid.sc_netid),
4091 rpc_peeraddr2str(clp->cl_rpcclient,
4092 RPC_DISPLAY_NETID));
de734831
CL		 4093 rcu_read_unlock();
4094 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4095 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4096 clp->cl_ipaddr, port >> 8, port & 255);
4097
6bbb4ae8
CL		 4098 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4099 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4100 setclientid.sc_name_len, setclientid.sc_name);
4101 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4102 dprintk("NFS reply setclientid: %d\n", status);
4103 return status;
1da177e4
LT		 4104}
4105
6bbb4ae8
CL		 4106/**
4107 * nfs4_proc_setclientid_confirm - Confirm client ID
4108 * @clp: state data structure
4109 * @res: result of a previous SETCLIENTID
4110 * @cred: RPC credential to use for this call
4111 *
4112 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4113 */
fd954ae1 4114int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4115 struct nfs4_setclientid_res *arg,
4116 struct rpc_cred *cred)
1da177e4
LT		 4117{
4118 struct nfs_fsinfo fsinfo;
4119 struct rpc_message msg = {
4120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4121 .rpc_argp = arg,
1da177e4 4122 .rpc_resp = &fsinfo,
286d7d6a 4123 .rpc_cred = cred,
1da177e4
LT		 4124 };
4125 unsigned long now;
4126 int status;
4127
6bbb4ae8
CL		 4128 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4129 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4130 clp->cl_clientid);
1da177e4 4131 now = jiffies;
1bd714f2 4132 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4133 if (status == 0) {
4134 spin_lock(&clp->cl_lock);
4135 clp->cl_lease_time = fsinfo.lease_time * HZ;
4136 clp->cl_last_renewal = now;
4137 spin_unlock(&clp->cl_lock);
4138 }
6bbb4ae8 4139 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4140 return status;
4141}
4142
fe650407
TM		 4143struct nfs4_delegreturndata {
4144 struct nfs4_delegreturnargs args;
fa178f29 4145 struct nfs4_delegreturnres res;
fe650407
TM		 4146 struct nfs_fh fh;
4147 nfs4_stateid stateid;
26e976a8 4148 unsigned long timestamp;
fa178f29 4149 struct nfs_fattr fattr;
fe650407
TM		 4150 int rpc_status;
4151};
4152
fe650407
TM		 4153static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4154{
4155 struct nfs4_delegreturndata *data = calldata;
938e1010 4156
14516c3a
TM		 4157 if (!nfs4_sequence_done(task, &data->res.seq_res))
4158 return;
938e1010 4159
79708861
RL		 4160 switch (task->tk_status) {
4161 case -NFS4ERR_STALE_STATEID:
4162 case -NFS4ERR_EXPIRED:
4163 case 0:
fa178f29 4164 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4165 break;
4166 default:
4167 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4168 -EAGAIN) {
d00c5d43 4169 rpc_restart_call_prepare(task);
79708861
RL		 4170 return;
4171 }
4172 }
4173 data->rpc_status = task->tk_status;
fe650407
TM		 4174}
4175
4176static void nfs4_delegreturn_release(void *calldata)
4177{
fe650407
TM		 4178 kfree(calldata);
4179}
4180
938e1010
AA		 4181#if defined(CONFIG_NFS_V4_1)
4182static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4183{
4184 struct nfs4_delegreturndata *d_data;
4185
4186 d_data = (struct nfs4_delegreturndata *)data;
4187
035168ab 4188 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4189 &d_data->args.seq_args,
9d12b216 4190 &d_data->res.seq_res, task))
938e1010
AA		 4191 return;
4192 rpc_call_start(task);
4193}
4194#endif /* CONFIG_NFS_V4_1 */
4195
c8d149f3 4196static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4197#if defined(CONFIG_NFS_V4_1)
4198 .rpc_call_prepare = nfs4_delegreturn_prepare,
4199#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4200 .rpc_call_done = nfs4_delegreturn_done,
4201 .rpc_release = nfs4_delegreturn_release,
4202};
4203
e6f81075 4204static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4205{
4206 struct nfs4_delegreturndata *data;
fa178f29 4207 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4208 struct rpc_task *task;
5138fde0
TM		 4209 struct rpc_message msg = {
4210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4211 .rpc_cred = cred,
4212 };
c970aa85
TM		 4213 struct rpc_task_setup task_setup_data = {
4214 .rpc_client = server->client,
5138fde0 4215 .rpc_message = &msg,
c970aa85
TM		 4216 .callback_ops = &nfs4_delegreturn_ops,
4217 .flags = RPC_TASK_ASYNC,
4218 };
e6f81075 4219 int status = 0;
fe650407 4220
8535b2be 4221 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4222 if (data == NULL)
4223 return -ENOMEM;
9d12b216 4224 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4225 data->args.fhandle = &data->fh;
4226 data->args.stateid = &data->stateid;
9e907fec 4227 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4228 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4229 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4230 data->res.fattr = &data->fattr;
4231 data->res.server = server;
5138fde0 4232 nfs_fattr_init(data->res.fattr);
26e976a8 4233 data->timestamp = jiffies;
fe650407
TM		 4234 data->rpc_status = 0;
4235
c970aa85 4236 task_setup_data.callback_data = data;
1174dd1f
TM		 4237 msg.rpc_argp = &data->args;
4238 msg.rpc_resp = &data->res;
c970aa85 4239 task = rpc_run_task(&task_setup_data);
7a1218a2 4240 if (IS_ERR(task))
fe650407 4241 return PTR_ERR(task);
e6f81075
TM		 4242 if (!issync)
4243 goto out;
fe650407 4244 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4245 if (status != 0)
4246 goto out;
4247 status = data->rpc_status;
e144cbcc
TM		 4248 if (status == 0)
4249 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4250 else
4251 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4252out:
e6b3c4db 4253 rpc_put_task(task);
fe650407 4254 return status;
1da177e4
LT		 4255}
4256
e6f81075 4257int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4258{
4259 struct nfs_server *server = NFS_SERVER(inode);
4260 struct nfs4_exception exception = { };
4261 int err;
4262 do {
e6f81075 4263 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4264 switch (err) {
4265 case -NFS4ERR_STALE_STATEID:
4266 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4267 case 0:
4268 return 0;
4269 }
4270 err = nfs4_handle_exception(server, err, &exception);
4271 } while (exception.retry);
4272 return err;
4273}
4274
4275#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4276#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4277
4278/*
4279 * sleep, with exponential backoff, and retry the LOCK operation.
4280 */
4281static unsigned long
4282nfs4_set_lock_task_retry(unsigned long timeout)
4283{
d310310c 4284 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4285 timeout <<= 1;
4286 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4287 return NFS4_LOCK_MAXTIMEOUT;
4288 return timeout;
4289}
4290
1da177e4
LT		 4291static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4292{
4293 struct inode *inode = state->inode;
4294 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4295 struct nfs_client *clp = server->nfs_client;
911d1aaf 4296 struct nfs_lockt_args arg = {
1da177e4 4297 .fh = NFS_FH(inode),
911d1aaf 4298 .fl = request,
1da177e4 4299 };
911d1aaf
TM		 4300 struct nfs_lockt_res res = {
4301 .denied = request,
1da177e4
LT		 4302 };
4303 struct rpc_message msg = {
4304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4305 .rpc_argp = &arg,
4306 .rpc_resp = &res,
4307 .rpc_cred = state->owner->so_cred,
4308 };
1da177e4
LT		 4309 struct nfs4_lock_state *lsp;
4310 int status;
4311
911d1aaf 4312 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4313 status = nfs4_set_lock_state(state, request);
4314 if (status != 0)
4315 goto out;
4316 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4317 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4318 arg.lock_owner.s_dev = server->s_dev;
7c513058 4319 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4320 switch (status) {
4321 case 0:
4322 request->fl_type = F_UNLCK;
4323 break;
4324 case -NFS4ERR_DENIED:
4325 status = 0;
1da177e4 4326 }
70cc6487 4327 request->fl_ops->fl_release_private(request);
8d0a8a9d 4328out:
1da177e4
LT		 4329 return status;
4330}
4331
4332static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4333{
4334 struct nfs4_exception exception = { };
4335 int err;
4336
4337 do {
4338 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4339 _nfs4_proc_getlk(state, cmd, request),
4340 &exception);
4341 } while (exception.retry);
4342 return err;
4343}
4344
4345static int do_vfs_lock(struct file *file, struct file_lock *fl)
4346{
4347 int res = 0;
4348 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4349 case FL_POSIX:
4350 res = posix_lock_file_wait(file, fl);
4351 break;
4352 case FL_FLOCK:
4353 res = flock_lock_file_wait(file, fl);
4354 break;
4355 default:
4356 BUG();
4357 }
1da177e4
LT		 4358 return res;
4359}
4360
faf5f49c 4361struct nfs4_unlockdata {
911d1aaf
TM		 4362 struct nfs_locku_args arg;
4363 struct nfs_locku_res res;
faf5f49c
TM		 4364 struct nfs4_lock_state *lsp;
4365 struct nfs_open_context *ctx;
911d1aaf
TM		 4366 struct file_lock fl;
4367 const struct nfs_server *server;
26e976a8 4368 unsigned long timestamp;
faf5f49c
TM		 4369};
4370
911d1aaf
TM		 4371static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4372 struct nfs_open_context *ctx,
4373 struct nfs4_lock_state *lsp,
4374 struct nfs_seqid *seqid)
4375{
4376 struct nfs4_unlockdata *p;
4377 struct inode *inode = lsp->ls_state->inode;
4378
8535b2be 4379 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4380 if (p == NULL)
4381 return NULL;
4382 p->arg.fh = NFS_FH(inode);
4383 p->arg.fl = &p->fl;
4384 p->arg.seqid = seqid;
c1d51931 4385 p->res.seqid = seqid;
911d1aaf
TM		 4386 p->arg.stateid = &lsp->ls_stateid;
4387 p->lsp = lsp;
4388 atomic_inc(&lsp->ls_count);
4389 /* Ensure we don't close file until we're done freeing locks! */
4390 p->ctx = get_nfs_open_context(ctx);
4391 memcpy(&p->fl, fl, sizeof(p->fl));
4392 p->server = NFS_SERVER(inode);
4393 return p;
4394}
4395
06f814a3 4396static void nfs4_locku_release_calldata(void *data)
faf5f49c 4397{
963d8fe5 4398 struct nfs4_unlockdata *calldata = data;
911d1aaf 4399 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4400 nfs4_put_lock_state(calldata->lsp);
4401 put_nfs_open_context(calldata->ctx);
4402 kfree(calldata);
faf5f49c
TM		 4403}
4404
963d8fe5 4405static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4406{
963d8fe5 4407 struct nfs4_unlockdata *calldata = data;
faf5f49c 4408
14516c3a
TM		 4409 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4410 return;
faf5f49c
TM		 4411 switch (task->tk_status) {
4412 case 0:
f597c537
TM		 4413 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4414 &calldata->res.stateid);
26e976a8 4415 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4416 break;
9e33bed5
TM		 4417 case -NFS4ERR_BAD_STATEID:
4418 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4419 case -NFS4ERR_STALE_STATEID:
4420 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4421 break;
4422 default:
9e33bed5 4423 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4424 rpc_restart_call_prepare(task);
faf5f49c 4425 }
faf5f49c
TM		 4426}
4427
4ce70ada 4428static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4429{
4ce70ada 4430 struct nfs4_unlockdata *calldata = data;
faf5f49c 4431
911d1aaf 4432 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4433 return;
795a88c9 4434 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4435 /* Note: exit _without_ running nfs4_locku_done */
4436 task->tk_action = NULL;
faf5f49c
TM		 4437 return;
4438 }
26e976a8 4439 calldata->timestamp = jiffies;
035168ab 4440 if (nfs4_setup_sequence(calldata->server,
a893693c 4441 &calldata->arg.seq_args,
9d12b216 4442 &calldata->res.seq_res, task))
a893693c 4443 return;
5138fde0 4444 rpc_call_start(task);
faf5f49c
TM		 4445}
4446
963d8fe5 4447static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4448 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4449 .rpc_call_done = nfs4_locku_done,
06f814a3 4450 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4451};
4452
a5d16a4d
TM		 4453static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4454 struct nfs_open_context *ctx,
4455 struct nfs4_lock_state *lsp,
4456 struct nfs_seqid *seqid)
4457{
4458 struct nfs4_unlockdata *data;
5138fde0
TM		 4459 struct rpc_message msg = {
4460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4461 .rpc_cred = ctx->cred,
4462 };
c970aa85
TM		 4463 struct rpc_task_setup task_setup_data = {
4464 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4465 .rpc_message = &msg,
c970aa85 4466 .callback_ops = &nfs4_locku_ops,
101070ca 4467 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4468 .flags = RPC_TASK_ASYNC,
4469 };
a5d16a4d 4470
137d6aca
FF		 4471 /* Ensure this is an unlock - when canceling a lock, the
4472 * canceled lock is passed in, and it won't be an unlock.
4473 */
4474 fl->fl_type = F_UNLCK;
4475
a5d16a4d
TM		 4476 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4477 if (data == NULL) {
4478 nfs_free_seqid(seqid);
4479 return ERR_PTR(-ENOMEM);
4480 }
4481
9d12b216 4482 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4483 msg.rpc_argp = &data->arg;
4484 msg.rpc_resp = &data->res;
c970aa85
TM		 4485 task_setup_data.callback_data = data;
4486 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4487}
4488
faf5f49c
TM		 4489static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4490{
19e03c57 4491 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4492 struct nfs_seqid *seqid;
1da177e4 4493 struct nfs4_lock_state *lsp;
06f814a3
TM		 4494 struct rpc_task *task;
4495 int status = 0;
536ff0f8 4496 unsigned char fl_flags = request->fl_flags;
faf5f49c 4497
8d0a8a9d 4498 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4499 /* Unlock _before_ we do the RPC call */
4500 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4501 down_read(&nfsi->rwsem);
4502 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4503 up_read(&nfsi->rwsem);
9b073574 4504 goto out;
19e03c57
TM		 4505 }
4506 up_read(&nfsi->rwsem);
8d0a8a9d 4507 if (status != 0)
9b073574
TM		 4508 goto out;
4509 /* Is this a delegated lock? */
4510 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4511 goto out;
8d0a8a9d 4512 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4513 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4514 status = -ENOMEM;
911d1aaf 4515 if (seqid == NULL)
9b073574 4516 goto out;
cd3758e3 4517 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4518 status = PTR_ERR(task);
4519 if (IS_ERR(task))
9b073574 4520 goto out;
a5d16a4d 4521 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4522 rpc_put_task(task);
9b073574 4523out:
536ff0f8 4524 request->fl_flags = fl_flags;
1da177e4
LT		 4525 return status;
4526}
4527
a5d16a4d
TM		 4528struct nfs4_lockdata {
4529 struct nfs_lock_args arg;
4530 struct nfs_lock_res res;
4531 struct nfs4_lock_state *lsp;
4532 struct nfs_open_context *ctx;
4533 struct file_lock fl;
26e976a8 4534 unsigned long timestamp;
a5d16a4d
TM		 4535 int rpc_status;
4536 int cancelled;
66179efe 4537 struct nfs_server *server;
a5d16a4d
TM		 4538};
4539
4540static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4541 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4542 gfp_t gfp_mask)
1da177e4 4543{
a5d16a4d
TM		 4544 struct nfs4_lockdata *p;
4545 struct inode *inode = lsp->ls_state->inode;
1da177e4 4546 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4547
8535b2be 4548 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4549 if (p == NULL)
4550 return NULL;
4551
4552 p->arg.fh = NFS_FH(inode);
4553 p->arg.fl = &p->fl;
8535b2be 4554 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4555 if (p->arg.open_seqid == NULL)
4556 goto out_free;
8535b2be 4557 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4558 if (p->arg.lock_seqid == NULL)
2f74c0a0 4559 goto out_free_seqid;
a5d16a4d 4560 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4561 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4562 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4563 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4564 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4565 p->lsp = lsp;
66179efe 4566 p->server = server;
a5d16a4d
TM		 4567 atomic_inc(&lsp->ls_count);
4568 p->ctx = get_nfs_open_context(ctx);
4569 memcpy(&p->fl, fl, sizeof(p->fl));
4570 return p;
2f74c0a0
TM		 4571out_free_seqid:
4572 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4573out_free:
4574 kfree(p);
4575 return NULL;
4576}
4577
4578static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4579{
4580 struct nfs4_lockdata *data = calldata;
4581 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4582
3110ff80 4583 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4584 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4585 return;
a5d16a4d
TM		 4586 /* Do we need to do an open_to_lock_owner? */
4587 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4588 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4589 return;
a5d16a4d
TM		 4590 data->arg.open_stateid = &state->stateid;
4591 data->arg.new_lock_owner = 1;
c1d51931 4592 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4593 } else
4594 data->arg.new_lock_owner = 0;
26e976a8 4595 data->timestamp = jiffies;
035168ab
TM		 4596 if (nfs4_setup_sequence(data->server,
4597 &data->arg.seq_args,
9d12b216 4598 &data->res.seq_res, task))
66179efe 4599 return;
5138fde0 4600 rpc_call_start(task);
3110ff80 4601 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4602}
4603
b257957e
AB		 4604static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4605{
4606 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4607 nfs4_lock_prepare(task, calldata);
4608}
4609
a5d16a4d
TM		 4610static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4611{
4612 struct nfs4_lockdata *data = calldata;
4613
3110ff80 4614 dprintk("%s: begin!\n", __func__);
a5d16a4d 4615
14516c3a
TM		 4616 if (!nfs4_sequence_done(task, &data->res.seq_res))
4617 return;
66179efe 4618
a5d16a4d 4619 data->rpc_status = task->tk_status;
a5d16a4d 4620 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4621 if (data->rpc_status == 0)
4622 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4623 else
4624 goto out;
4625 }
4626 if (data->rpc_status == 0) {
f597c537 4627 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4628 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4629 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4630 }
a5d16a4d 4631out:
3110ff80 4632 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4633}
4634
4635static void nfs4_lock_release(void *calldata)
4636{
4637 struct nfs4_lockdata *data = calldata;
4638
3110ff80 4639 dprintk("%s: begin!\n", __func__);
2f74c0a0 4640 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4641 if (data->cancelled != 0) {
4642 struct rpc_task *task;
4643 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4644 data->arg.lock_seqid);
4645 if (!IS_ERR(task))
bf294b41 4646 rpc_put_task_async(task);
3110ff80 4647 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4648 } else
4649 nfs_free_seqid(data->arg.lock_seqid);
4650 nfs4_put_lock_state(data->lsp);
4651 put_nfs_open_context(data->ctx);
4652 kfree(data);
3110ff80 4653 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4654}
4655
4656static const struct rpc_call_ops nfs4_lock_ops = {
4657 .rpc_call_prepare = nfs4_lock_prepare,
4658 .rpc_call_done = nfs4_lock_done,
4659 .rpc_release = nfs4_lock_release,
4660};
4661
b257957e
AB		 4662static const struct rpc_call_ops nfs4_recover_lock_ops = {
4663 .rpc_call_prepare = nfs4_recover_lock_prepare,
4664 .rpc_call_done = nfs4_lock_done,
4665 .rpc_release = nfs4_lock_release,
4666};
4667
2bee72a6
TM		 4668static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4669{
2bee72a6
TM		 4670 switch (error) {
4671 case -NFS4ERR_ADMIN_REVOKED:
4672 case -NFS4ERR_BAD_STATEID:
ecac799a 4673 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4674 if (new_lock_owner != 0 ||
795a88c9 4675 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4676 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4677 break;
4678 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4679 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4680 case -NFS4ERR_EXPIRED:
4681 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4682 };
4683}
4684
afe6c27c 4685static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4686{
4687 struct nfs4_lockdata *data;
4688 struct rpc_task *task;
5138fde0
TM		 4689 struct rpc_message msg = {
4690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4691 .rpc_cred = state->owner->so_cred,
4692 };
c970aa85
TM		 4693 struct rpc_task_setup task_setup_data = {
4694 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4695 .rpc_message = &msg,
c970aa85 4696 .callback_ops = &nfs4_lock_ops,
101070ca 4697 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4698 .flags = RPC_TASK_ASYNC,
4699 };
a5d16a4d
TM		 4700 int ret;
4701
3110ff80 4702 dprintk("%s: begin!\n", __func__);
cd3758e3 4703 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4704 fl->fl_u.nfs4_fl.owner,
4705 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4706 if (data == NULL)
4707 return -ENOMEM;
4708 if (IS_SETLKW(cmd))
4709 data->arg.block = 1;
b257957e
AB		 4710 if (recovery_type > NFS_LOCK_NEW) {
4711 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4712 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4713 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4714 }
9d12b216 4715 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4716 msg.rpc_argp = &data->arg;
4717 msg.rpc_resp = &data->res;
c970aa85
TM		 4718 task_setup_data.callback_data = data;
4719 task = rpc_run_task(&task_setup_data);
7a1218a2 4720 if (IS_ERR(task))
a5d16a4d 4721 return PTR_ERR(task);
a5d16a4d
TM		 4722 ret = nfs4_wait_for_completion_rpc_task(task);
4723 if (ret == 0) {
4724 ret = data->rpc_status;
2bee72a6
TM		 4725 if (ret)
4726 nfs4_handle_setlk_error(data->server, data->lsp,
4727 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4728 } else
4729 data->cancelled = 1;
e6b3c4db 4730 rpc_put_task(task);
3110ff80 4731 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4732 return ret;
1da177e4
LT		 4733}
4734
4735static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4736{
202b50dc 4737 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4738 struct nfs4_exception exception = {
4739 .inode = state->inode,
4740 };
202b50dc
TM		 4741 int err;
4742
4743 do {
42a2d13e
TM		 4744 /* Cache the lock if possible... */
4745 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4746 return 0;
afe6c27c 4747 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4748 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4749 break;
4750 nfs4_handle_exception(server, err, &exception);
4751 } while (exception.retry);
4752 return err;
1da177e4
LT		 4753}
4754
4755static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4756{
202b50dc 4757 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4758 struct nfs4_exception exception = {
4759 .inode = state->inode,
4760 };
202b50dc
TM		 4761 int err;
4762
6bfc93ef
TM		 4763 err = nfs4_set_lock_state(state, request);
4764 if (err != 0)
4765 return err;
202b50dc 4766 do {
42a2d13e
TM		 4767 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4768 return 0;
afe6c27c 4769 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4770 switch (err) {
4771 default:
4772 goto out;
4773 case -NFS4ERR_GRACE:
4774 case -NFS4ERR_DELAY:
4775 nfs4_handle_exception(server, err, &exception);
4776 err = 0;
4777 }
202b50dc 4778 } while (exception.retry);
a9ed2e25 4779out:
202b50dc 4780 return err;
1da177e4
LT		 4781}
4782
f062eb6c 4783#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4784/**
4785 * nfs41_check_expired_locks - possibly free a lock stateid
4786 *
4787 * @state: NFSv4 state for an inode
4788 *
4789 * Returns NFS_OK if recovery for this stateid is now finished.
4790 * Otherwise a negative NFS4ERR value is returned.
4791 */
b01dd1d8 4792static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4793{
eb64cf96 4794 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4795 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4796 struct nfs_server *server = NFS_SERVER(state->inode);
4797
b01dd1d8 4798 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4799 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4800 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4801 if (status != NFS_OK) {
3e60ffdd
CL		 4802 /* Free the stateid unless the server
4803 * informs us the stateid is unrecognized. */
89af2739
CL		 4804 if (status != -NFS4ERR_BAD_STATEID)
4805 nfs41_free_stateid(server,
4806 &lsp->ls_stateid);
795a88c9 4807 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4808 ret = status;
4809 }
4810 }
4811 };
4812
4813 return ret;
4814}
4815
4816static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4817{
4818 int status = NFS_OK;
4819
4820 if (test_bit(LK_STATE_IN_USE, &state->flags))
4821 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4822 if (status != NFS_OK)
4823 status = nfs4_lock_expired(state, request);
4824 return status;
f062eb6c
BS		 4825}
4826#endif
4827
1da177e4
LT		 4828static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4829{
19e03c57 4830 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4831 unsigned char fl_flags = request->fl_flags;
8e469ebd 4832 int status = -ENOLCK;
1da177e4 4833
8e469ebd
TM		 4834 if ((fl_flags & FL_POSIX) &&
4835 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4836 goto out;
6bfc93ef 4837 /* Is this a delegated open? */
6bfc93ef
TM		 4838 status = nfs4_set_lock_state(state, request);
4839 if (status != 0)
4840 goto out;
01c3b861
TM		 4841 request->fl_flags |= FL_ACCESS;
4842 status = do_vfs_lock(request->fl_file, request);
4843 if (status < 0)
4844 goto out;
19e03c57 4845 down_read(&nfsi->rwsem);
01c3b861 4846 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4847 /* Yes: cache locks! */
01c3b861 4848 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4849 request->fl_flags = fl_flags & ~FL_SLEEP;
4850 status = do_vfs_lock(request->fl_file, request);
4851 goto out_unlock;
01c3b861 4852 }
afe6c27c 4853 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4854 if (status != 0)
01c3b861 4855 goto out_unlock;
6bfc93ef 4856 /* Note: we always want to sleep here! */
01c3b861 4857 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4858 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4859 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4860 "manager!\n", __func__);
01c3b861 4861out_unlock:
19e03c57 4862 up_read(&nfsi->rwsem);
01c3b861
TM		 4863out:
4864 request->fl_flags = fl_flags;
1da177e4
LT		 4865 return status;
4866}
4867
4868static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4869{
a1d0b5ee
TM		 4870 struct nfs4_exception exception = {
4871 .state = state,
05ffe24f 4872 .inode = state->inode,
a1d0b5ee 4873 };
1da177e4
LT		 4874 int err;
4875
4876 do {
965b5d67
TM		 4877 err = _nfs4_proc_setlk(state, cmd, request);
4878 if (err == -NFS4ERR_DENIED)
4879 err = -EAGAIN;
1da177e4 4880 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4881 err, &exception);
1da177e4
LT		 4882 } while (exception.retry);
4883 return err;
4884}
4885
4886static int
4887nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4888{
4889 struct nfs_open_context *ctx;
4890 struct nfs4_state *state;
4891 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4892 int status;
4893
4894 /* verify open state */
cd3758e3 4895 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4896 state = ctx->state;
4897
4898 if (request->fl_start < 0 || request->fl_end < 0)
4899 return -EINVAL;
4900
d953126a
TM		 4901 if (IS_GETLK(cmd)) {
4902 if (state != NULL)
4903 return nfs4_proc_getlk(state, F_GETLK, request);
4904 return 0;
4905 }
1da177e4
LT		 4906
4907 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4908 return -EINVAL;
4909
d953126a
TM		 4910 if (request->fl_type == F_UNLCK) {
4911 if (state != NULL)
4912 return nfs4_proc_unlck(state, cmd, request);
4913 return 0;
4914 }
1da177e4 4915
d953126a
TM		 4916 if (state == NULL)
4917 return -ENOLCK;
55725513
TM		 4918 /*
4919 * Don't rely on the VFS having checked the file open mode,
4920 * since it won't do this for flock() locks.
4921 */
f44106e2 4922 switch (request->fl_type) {
55725513
TM		 4923 case F_RDLCK:
4924 if (!(filp->f_mode & FMODE_READ))
4925 return -EBADF;
4926 break;
4927 case F_WRLCK:
4928 if (!(filp->f_mode & FMODE_WRITE))
4929 return -EBADF;
4930 }
4931
1da177e4
LT		 4932 do {
4933 status = nfs4_proc_setlk(state, cmd, request);
4934 if ((status != -EAGAIN) || IS_SETLK(cmd))
4935 break;
4936 timeout = nfs4_set_lock_task_retry(timeout);
4937 status = -ERESTARTSYS;
4938 if (signalled())
4939 break;
4940 } while(status < 0);
1da177e4
LT		 4941 return status;
4942}
4943
888e694c
TM		 4944int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4945{
4946 struct nfs_server *server = NFS_SERVER(state->inode);
4947 struct nfs4_exception exception = { };
4948 int err;
4949
4950 err = nfs4_set_lock_state(state, fl);
4951 if (err != 0)
4952 goto out;
4953 do {
afe6c27c 4954 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4955 switch (err) {
4956 default:
a030889a
WAA		 4957 printk(KERN_ERR "NFS: %s: unhandled error "
4958 "%d.\n", __func__, err);
d5122201 4959 case 0:
965b5d67 4960 case -ESTALE:
d5122201
TM		 4961 goto out;
4962 case -NFS4ERR_EXPIRED:
0ced63d1 4963 nfs4_schedule_stateid_recovery(server, state);
d5122201 4964 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4965 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4966 nfs4_schedule_lease_recovery(server->nfs_client);
4967 goto out;
74e7bb73
RL		 4968 case -NFS4ERR_BADSESSION:
4969 case -NFS4ERR_BADSLOT:
4970 case -NFS4ERR_BAD_HIGH_SLOT:
4971 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4972 case -NFS4ERR_DEADSESSION:
9f594791 4973 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4974 goto out;
965b5d67
TM		 4975 case -ERESTARTSYS:
4976 /*
4977 * The show must go on: exit, but mark the
4978 * stateid as needing recovery.
4979 */
a1d0b5ee 4980 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4981 case -NFS4ERR_ADMIN_REVOKED:
4982 case -NFS4ERR_BAD_STATEID:
4983 case -NFS4ERR_OPENMODE:
0400a6b0 4984 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4985 err = 0;
4986 goto out;
168667c4
TM		 4987 case -EKEYEXPIRED:
4988 /*
4989 * User RPCSEC_GSS context has expired.
4990 * We cannot recover this stateid now, so
4991 * skip it and allow recovery thread to
4992 * proceed.
4993 */
4994 err = 0;
4995 goto out;
965b5d67
TM		 4996 case -ENOMEM:
4997 case -NFS4ERR_DENIED:
4998 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4999 err = 0;
5000 goto out;
d5122201
TM		 5001 case -NFS4ERR_DELAY:
5002 break;
5003 }
888e694c
TM		 5004 err = nfs4_handle_exception(server, err, &exception);
5005 } while (exception.retry);
5006out:
5007 return err;
5008}
6b3b5496 5009
cf470c3e
TM		 5010struct nfs_release_lockowner_data {
5011 struct nfs4_lock_state *lsp;
5ae67c4f 5012 struct nfs_server *server;
cf470c3e
TM		 5013 struct nfs_release_lockowner_args args;
5014};
5015
d3c7b7cc
TM		 5016static void nfs4_release_lockowner_release(void *calldata)
5017{
cf470c3e 5018 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5019 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5020 kfree(calldata);
5021}
5022
17280175 5023static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5024 .rpc_release = nfs4_release_lockowner_release,
5025};
5026
cf470c3e 5027int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5028{
5029 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5030 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5031 struct rpc_message msg = {
5032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5033 };
5034
5035 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5036 return -EINVAL;
5037 data = kmalloc(sizeof(*data), GFP_NOFS);
5038 if (!data)
5039 return -ENOMEM;
5040 data->lsp = lsp;
5ae67c4f 5041 data->server = server;
cf470c3e
TM		 5042 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5043 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5044 data->args.lock_owner.s_dev = server->s_dev;
5045 msg.rpc_argp = &data->args;
5046 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5047 return 0;
d3c7b7cc
TM		 5048}
5049
aa1870af
BF		 5050#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5051
64c2ce8b
AK		 5052static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5053 const void *buf, size_t buflen,
5054 int flags, int type)
6b3b5496 5055{
64c2ce8b
AK		 5056 if (strcmp(key, "") != 0)
5057 return -EINVAL;
4b580ee3 5058
64c2ce8b 5059 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5060}
5061
64c2ce8b
AK		 5062static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5063 void *buf, size_t buflen, int type)
6b3b5496 5064{
64c2ce8b
AK		 5065 if (strcmp(key, "") != 0)
5066 return -EINVAL;
aa1870af 5067
64c2ce8b 5068 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5069}
5070
64c2ce8b
AK		 5071static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5072 size_t list_len, const char *name,
5073 size_t name_len, int type)
6b3b5496 5074{
64c2ce8b 5075 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5076
096455a2
BF		 5077 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5078 return 0;
64c2ce8b
AK		 5079
5080 if (list && len <= list_len)
5081 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5082 return len;
6b3b5496
BF		 5083}
5084
533eb461
AA		 5085/*
5086 * nfs_fhget will use either the mounted_on_fileid or the fileid
5087 */
69aaaae1
TM		 5088static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5089{
533eb461
AA		 5090 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5091 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5092 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5093 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5094 return;
5095
5096 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5097 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5098 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5099 fattr->nlink = 2;
5100}
5101
f05d147f
BS		 5102static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5103 const struct qstr *name,
5104 struct nfs4_fs_locations *fs_locations,
5105 struct page *page)
683b57b4
TM		 5106{
5107 struct nfs_server *server = NFS_SERVER(dir);
5108 u32 bitmask[2] = {
361e624f 5109 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5110 };
5111 struct nfs4_fs_locations_arg args = {
5112 .dir_fh = NFS_FH(dir),
c228fd3a 5113 .name = name,
683b57b4
TM		 5114 .page = page,
5115 .bitmask = bitmask,
5116 };
22958463
BH		 5117 struct nfs4_fs_locations_res res = {
5118 .fs_locations = fs_locations,
5119 };
683b57b4
TM		 5120 struct rpc_message msg = {
5121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5122 .rpc_argp = &args,
22958463 5123 .rpc_resp = &res,
683b57b4
TM		 5124 };
5125 int status;
5126
3110ff80 5127 dprintk("%s: start\n", __func__);
533eb461
AA		 5128
5129 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5130 * is not supported */
5131 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5132 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5133 else
5134 bitmask[0] |= FATTR4_WORD0_FILEID;
5135
c228fd3a 5136 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5137 fs_locations->server = server;
830b8e33 5138 fs_locations->nlocations = 0;
f05d147f 5139 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5140 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5141 return status;
5142}
5143
f05d147f
BS		 5144int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5145 const struct qstr *name,
5146 struct nfs4_fs_locations *fs_locations,
5147 struct page *page)
db0a9593
BS		 5148{
5149 struct nfs4_exception exception = { };
5150 int err;
5151 do {
5152 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5153 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5154 &exception);
5155 } while (exception.retry);
5156 return err;
5157}
5158
5a5ea0d4
BS		 5159static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5160{
5161 int status;
5162 struct nfs4_secinfo_arg args = {
5163 .dir_fh = NFS_FH(dir),
5164 .name = name,
5165 };
5166 struct nfs4_secinfo_res res = {
5167 .flavors = flavors,
5168 };
5169 struct rpc_message msg = {
5170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5171 .rpc_argp = &args,
5172 .rpc_resp = &res,
5173 };
5174
5175 dprintk("NFS call secinfo %s\n", name->name);
5176 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5177 dprintk("NFS reply secinfo: %d\n", status);
5178 return status;
5179}
5180
72de53ec
BS		 5181int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5182 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5183{
5184 struct nfs4_exception exception = { };
5185 int err;
5186 do {
5187 err = nfs4_handle_exception(NFS_SERVER(dir),
5188 _nfs4_proc_secinfo(dir, name, flavors),
5189 &exception);
5190 } while (exception.retry);
5191 return err;
5192}
5193
557134a3 5194#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5195/*
5196 * Check the exchange flags returned by the server for invalid flags, having
5197 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5198 * DS flags set.
5199 */
5200static int nfs4_check_cl_exchange_flags(u32 flags)
5201{
5202 if (flags & ~EXCHGID4_FLAG_MASK_R)
5203 goto out_inval;
5204 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5205 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5206 goto out_inval;
5207 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5208 goto out_inval;
5209 return NFS_OK;
5210out_inval:
5211 return -NFS4ERR_INVAL;
5212}
5213
78fe0f41 5214static bool
79d4e1f0
CL		 5215nfs41_same_server_scope(struct nfs41_server_scope *a,
5216 struct nfs41_server_scope *b)
78fe0f41
WAA		 5217{
5218 if (a->server_scope_sz == b->server_scope_sz &&
5219 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5220 return true;
5221
5222 return false;
5223}
5224
7c44f1ae
WAA		 5225/*
5226 * nfs4_proc_bind_conn_to_session()
5227 *
5228 * The 4.1 client currently uses the same TCP connection for the
5229 * fore and backchannel.
5230 */
2cf047c9 5231int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5232{
5233 int status;
5234 struct nfs41_bind_conn_to_session_res res;
5235 struct rpc_message msg = {
5236 .rpc_proc =
5237 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5238 .rpc_argp = clp,
5239 .rpc_resp = &res,
2cf047c9 5240 .rpc_cred = cred,
7c44f1ae
WAA		 5241 };
5242
5243 dprintk("--> %s\n", __func__);
5244 BUG_ON(clp == NULL);
5245
5246 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5247 if (unlikely(res.session == NULL)) {
5248 status = -ENOMEM;
5249 goto out;
5250 }
5251
5252 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5253 if (status == 0) {
5254 if (memcmp(res.session->sess_id.data,
5255 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5256 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5257 status = -EIO;
5258 goto out_session;
5259 }
5260 if (res.dir != NFS4_CDFS4_BOTH) {
5261 dprintk("NFS: %s: Unexpected direction from server\n",
5262 __func__);
5263 status = -EIO;
5264 goto out_session;
5265 }
5266 if (res.use_conn_in_rdma_mode) {
5267 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5268 __func__);
5269 status = -EIO;
5270 goto out_session;
5271 }
5272 }
5273out_session:
5274 kfree(res.session);
5275out:
5276 dprintk("<-- %s status= %d\n", __func__, status);
5277 return status;
5278}
5279
99fe60d0
BH		 5280/*
5281 * nfs4_proc_exchange_id()
5282 *
6bbb4ae8
CL		 5283 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5284 *
99fe60d0
BH		 5285 * Since the clientid has expired, all compounds using sessions
5286 * associated with the stale clientid will be returning
5287 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5288 * be in some phase of session reset.
5289 */
4d643d1d 5290int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5291{
5292 nfs4_verifier verifier;
5293 struct nfs41_exchange_id_args args = {
cd93710e 5294 .verifier = &verifier,
99fe60d0 5295 .client = clp,
357f54d6 5296 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5297 };
5298 struct nfs41_exchange_id_res res = {
32b01310 5299 0
99fe60d0
BH		 5300 };
5301 int status;
5302 struct rpc_message msg = {
5303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5304 .rpc_argp = &args,
5305 .rpc_resp = &res,
5306 .rpc_cred = cred,
5307 };
99fe60d0 5308
f092075d 5309 nfs4_init_boot_verifier(clp, &verifier);
c7a360b0 5310 args.id_len = scnprintf(args.id, sizeof(args.id),
de734831 5311 "%s/%s",
c7a360b0 5312 clp->cl_ipaddr,
de734831 5313 clp->cl_rpcclient->cl_nodename);
6bbb4ae8
CL		 5314 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5315 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5316 args.id_len, args.id);
99fe60d0 5317
acdeb69d 5318 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5319 GFP_NOFS);
acdeb69d 5320 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5321 status = -ENOMEM;
5322 goto out;
5323 }
78fe0f41 5324
79d4e1f0 5325 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5326 GFP_NOFS);
177313f1 5327 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5328 status = -ENOMEM;
acdeb69d 5329 goto out_server_owner;
abe9a6d5 5330 }
78fe0f41 5331
bbafffd2 5332 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5333 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5334 status = -ENOMEM;
5335 goto out_server_scope;
5336 }
5337
1bd714f2 5338 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5339 if (status == 0)
32b01310 5340 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5341
acdeb69d 5342 if (status == 0) {
32b01310
TM		 5343 clp->cl_clientid = res.clientid;
5344 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5345 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5346 clp->cl_seqid = res.seqid;
5347
acdeb69d
CL		 5348 kfree(clp->cl_serverowner);
5349 clp->cl_serverowner = res.server_owner;
5350 res.server_owner = NULL;
78fe0f41 5351
7d2ed9ac 5352 /* use the most recent implementation id */
59155546
CL		 5353 kfree(clp->cl_implid);
5354 clp->cl_implid = res.impl_id;
7d2ed9ac 5355
177313f1 5356 if (clp->cl_serverscope != NULL &&
79d4e1f0 5357 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5358 res.server_scope)) {
5359 dprintk("%s: server_scope mismatch detected\n",
5360 __func__);
5361 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5362 kfree(clp->cl_serverscope);
5363 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5364 }
5365
177313f1 5366 if (clp->cl_serverscope == NULL) {
79d4e1f0 5367 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5368 goto out;
5369 }
32b01310
TM		 5370 } else
5371 kfree(res.impl_id);
7d2ed9ac 5372
acdeb69d
CL		 5373out_server_owner:
5374 kfree(res.server_owner);
7d2ed9ac 5375out_server_scope:
abe9a6d5
WAA		 5376 kfree(res.server_scope);
5377out:
177313f1 5378 if (clp->cl_implid != NULL)
6bbb4ae8 5379 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5380 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5381 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5382 clp->cl_implid->date.seconds,
5383 clp->cl_implid->date.nseconds);
6bbb4ae8 5384 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5385 return status;
5386}
5387
66245539
TM		 5388static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5389 struct rpc_cred *cred)
5390{
5391 struct rpc_message msg = {
5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5393 .rpc_argp = clp,
5394 .rpc_cred = cred,
5395 };
5396 int status;
5397
5398 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5399 if (status)
02c67525 5400 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5401 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5402 return status;
5403}
5404
5405static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5406 struct rpc_cred *cred)
5407{
5408 unsigned int loop;
5409 int ret;
5410
5411 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5412 ret = _nfs4_proc_destroy_clientid(clp, cred);
5413 switch (ret) {
5414 case -NFS4ERR_DELAY:
5415 case -NFS4ERR_CLIENTID_BUSY:
5416 ssleep(1);
5417 break;
5418 default:
5419 return ret;
5420 }
5421 }
5422 return 0;
5423}
5424
5425int nfs4_destroy_clientid(struct nfs_client *clp)
5426{
5427 struct rpc_cred *cred;
5428 int ret = 0;
5429
5430 if (clp->cl_mvops->minor_version < 1)
5431 goto out;
5432 if (clp->cl_exchange_flags == 0)
5433 goto out;
5434 cred = nfs4_get_exchange_id_cred(clp);
5435 ret = nfs4_proc_destroy_clientid(clp, cred);
5436 if (cred)
5437 put_rpccred(cred);
5438 switch (ret) {
5439 case 0:
5440 case -NFS4ERR_STALE_CLIENTID:
5441 clp->cl_exchange_flags = 0;
5442 }
5443out:
5444 return ret;
5445}
5446
2050f0cc
AA		 5447struct nfs4_get_lease_time_data {
5448 struct nfs4_get_lease_time_args *args;
5449 struct nfs4_get_lease_time_res *res;
5450 struct nfs_client *clp;
5451};
5452
5453static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5454 void *calldata)
5455{
5456 int ret;
5457 struct nfs4_get_lease_time_data *data =
5458 (struct nfs4_get_lease_time_data *)calldata;
5459
5460 dprintk("--> %s\n", __func__);
689cf5c1 5461 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5462 /* just setup sequence, do not trigger session recovery
5463 since we're invoked within one */
5464 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5465 &data->args->la_seq_args,
9d12b216 5466 &data->res->lr_seq_res, task);
2050f0cc
AA		 5467
5468 BUG_ON(ret == -EAGAIN);
5469 rpc_call_start(task);
5470 dprintk("<-- %s\n", __func__);
5471}
5472
5473/*
5474 * Called from nfs4_state_manager thread for session setup, so don't recover
5475 * from sequence operation or clientid errors.
5476 */
5477static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5478{
5479 struct nfs4_get_lease_time_data *data =
5480 (struct nfs4_get_lease_time_data *)calldata;
5481
5482 dprintk("--> %s\n", __func__);
14516c3a
TM		 5483 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5484 return;
2050f0cc
AA		 5485 switch (task->tk_status) {
5486 case -NFS4ERR_DELAY:
5487 case -NFS4ERR_GRACE:
5488 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5489 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5490 task->tk_status = 0;
a8a4ae3a
AA		 5491 /* fall through */
5492 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5493 rpc_restart_call_prepare(task);
2050f0cc
AA		 5494 return;
5495 }
2050f0cc
AA		 5496 dprintk("<-- %s\n", __func__);
5497}
5498
17280175 5499static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5500 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5501 .rpc_call_done = nfs4_get_lease_time_done,
5502};
5503
5504int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5505{
5506 struct rpc_task *task;
5507 struct nfs4_get_lease_time_args args;
5508 struct nfs4_get_lease_time_res res = {
5509 .lr_fsinfo = fsinfo,
5510 };
5511 struct nfs4_get_lease_time_data data = {
5512 .args = &args,
5513 .res = &res,
5514 .clp = clp,
5515 };
5516 struct rpc_message msg = {
5517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5518 .rpc_argp = &args,
5519 .rpc_resp = &res,
5520 };
5521 struct rpc_task_setup task_setup = {
5522 .rpc_client = clp->cl_rpcclient,
5523 .rpc_message = &msg,
5524 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5525 .callback_data = &data,
5526 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5527 };
5528 int status;
5529
9d12b216 5530 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5531 dprintk("--> %s\n", __func__);
5532 task = rpc_run_task(&task_setup);
5533
5534 if (IS_ERR(task))
5535 status = PTR_ERR(task);
5536 else {
5537 status = task->tk_status;
5538 rpc_put_task(task);
5539 }
5540 dprintk("<-- %s return %d\n", __func__, status);
5541
5542 return status;
5543}
5544
f86f36a6
TM		 5545static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5546{
5547 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5548}
5549
5550static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5551 struct nfs4_slot *new,
5552 u32 max_slots,
5553 u32 ivalue)
5554{
5555 struct nfs4_slot *old = NULL;
5556 u32 i;
5557
5558 spin_lock(&tbl->slot_tbl_lock);
5559 if (new) {
5560 old = tbl->slots;
5561 tbl->slots = new;
5562 tbl->max_slots = max_slots;
5563 }
5564 tbl->highest_used_slotid = -1; /* no slot is currently used */
5565 for (i = 0; i < tbl->max_slots; i++)
5566 tbl->slots[i].seq_nr = ivalue;
5567 spin_unlock(&tbl->slot_tbl_lock);
5568 kfree(old);
5569}
5570
b73dafa7 5571/*
f86f36a6 5572 * (re)Initialise a slot table
b73dafa7 5573 */
f86f36a6
TM		 5574static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5575 u32 ivalue)
ac72b7b3 5576{
104aeba4 5577 struct nfs4_slot *new = NULL;
f86f36a6 5578 int ret = -ENOMEM;
ac72b7b3 5579
104aeba4
AA		 5580 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5581 max_reqs, tbl->max_slots);
ac72b7b3 5582
104aeba4
AA		 5583 /* Does the newly negotiated max_reqs match the existing slot table? */
5584 if (max_reqs != tbl->max_slots) {
f86f36a6 5585 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5586 if (!new)
5587 goto out;
104aeba4 5588 }
f86f36a6
TM		 5589 ret = 0;
5590
5591 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5592 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5593 tbl, tbl->slots, tbl->max_slots);
5594out:
5595 dprintk("<-- %s: return %d\n", __func__, ret);
5596 return ret;
5597}
5598
f8625a6a
RL		 5599/* Destroy the slot table */
5600static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5601{
5602 if (session->fc_slot_table.slots != NULL) {
5603 kfree(session->fc_slot_table.slots);
5604 session->fc_slot_table.slots = NULL;
5605 }
5606 if (session->bc_slot_table.slots != NULL) {
5607 kfree(session->bc_slot_table.slots);
5608 session->bc_slot_table.slots = NULL;
5609 }
5610 return;
5611}
5612
050047ce 5613/*
aacd5537 5614 * Initialize or reset the forechannel and backchannel tables
050047ce 5615 */
aacd5537 5616static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5617{
f26468fb 5618 struct nfs4_slot_table *tbl;
aacd5537 5619 int status;
050047ce 5620
aacd5537
AA		 5621 dprintk("--> %s\n", __func__);
5622 /* Fore channel */
5623 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5624 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5625 if (status) /* -ENOMEM */
5626 return status;
aacd5537
AA		 5627 /* Back channel */
5628 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5629 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5630 if (status && tbl->slots == NULL)
5631 /* Fore and back channel share a connection so get
5632 * both slot tables or neither */
5633 nfs4_destroy_slot_tables(ses);
f8625a6a 5634 return status;
557134a3
AA		 5635}
5636
5637struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5638{
5639 struct nfs4_session *session;
5640 struct nfs4_slot_table *tbl;
5641
8535b2be 5642 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5643 if (!session)
5644 return NULL;
76db6d95 5645
557134a3 5646 tbl = &session->fc_slot_table;
45d43c29 5647 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5648 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5649 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5650 init_completion(&tbl->complete);
f8625a6a
RL		 5651
5652 tbl = &session->bc_slot_table;
45d43c29 5653 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5654 spin_lock_init(&tbl->slot_tbl_lock);
5655 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5656 init_completion(&tbl->complete);
f8625a6a 5657
1055d76d
TM		 5658 session->session_state = 1<<NFS4_SESSION_INITING;
5659
557134a3
AA		 5660 session->clp = clp;
5661 return session;
5662}
5663
5664void nfs4_destroy_session(struct nfs4_session *session)
5665{
2446ab60 5666 struct rpc_xprt *xprt;
848f5bda 5667 struct rpc_cred *cred;
2446ab60 5668
848f5bda
TM		 5669 cred = nfs4_get_exchange_id_cred(session->clp);
5670 nfs4_proc_destroy_session(session, cred);
5671 if (cred)
5672 put_rpccred(cred);
2446ab60
TM		 5673
5674 rcu_read_lock();
5675 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5676 rcu_read_unlock();
5a0ffe54 5677 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5678 __func__, xprt);
5679 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5680 nfs4_destroy_slot_tables(session);
557134a3
AA		 5681 kfree(session);
5682}
5683
fc931582
AA		 5684/*
5685 * Initialize the values to be used by the client in CREATE_SESSION
5686 * If nfs4_init_session set the fore channel request and response sizes,
5687 * use them.
5688 *
5689 * Set the back channel max_resp_sz_cached to zero to force the client to
5690 * always set csa_cachethis to FALSE because the current implementation
5691 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5692 */
5693static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5694{
5695 struct nfs4_session *session = args->client->cl_session;
5696 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5697 mxresp_sz = session->fc_attrs.max_resp_sz;
5698
5699 if (mxrqst_sz == 0)
5700 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5701 if (mxresp_sz == 0)
5702 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5703 /* Fore channel attributes */
fc931582
AA		 5704 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5705 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5706 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5707 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5708
5709 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5710 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5711 __func__,
5712 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5713 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5714
5715 /* Back channel attributes */
fc931582
AA		 5716 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5717 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5718 args->bc_attrs.max_resp_sz_cached = 0;
5719 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5720 args->bc_attrs.max_reqs = 1;
5721
5722 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5723 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5724 __func__,
5725 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5726 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5727 args->bc_attrs.max_reqs);
5728}
5729
43c2e885 5730static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5731{
43c2e885
BF		 5732 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5733 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5734
43c2e885
BF		 5735 if (rcvd->max_resp_sz > sent->max_resp_sz)
5736 return -EINVAL;
5737 /*
5738 * Our requested max_ops is the minimum we need; we're not
5739 * prepared to break up compounds into smaller pieces than that.
5740 * So, no point even trying to continue if the server won't
5741 * cooperate:
5742 */
5743 if (rcvd->max_ops < sent->max_ops)
5744 return -EINVAL;
5745 if (rcvd->max_reqs == 0)
5746 return -EINVAL;
b4b9a0c1
VG		 5747 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5748 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5749 return 0;
8d35301d
AA		 5750}
5751
43c2e885
BF		 5752static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5753{
5754 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5755 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5756
43c2e885
BF		 5757 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5758 return -EINVAL;
5759 if (rcvd->max_resp_sz < sent->max_resp_sz)
5760 return -EINVAL;
5761 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5762 return -EINVAL;
5763 /* These would render the backchannel useless: */
b4b9a0c1 5764 if (rcvd->max_ops != sent->max_ops)
43c2e885 5765 return -EINVAL;
b4b9a0c1 5766 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5767 return -EINVAL;
5768 return 0;
5769}
8d35301d 5770
8d35301d
AA		 5771static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5772 struct nfs4_session *session)
5773{
43c2e885 5774 int ret;
8d35301d 5775
43c2e885
BF		 5776 ret = nfs4_verify_fore_channel_attrs(args, session);
5777 if (ret)
5778 return ret;
5779 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5780}
5781
848f5bda
TM		 5782static int _nfs4_proc_create_session(struct nfs_client *clp,
5783 struct rpc_cred *cred)
fc931582
AA		 5784{
5785 struct nfs4_session *session = clp->cl_session;
5786 struct nfs41_create_session_args args = {
5787 .client = clp,
5788 .cb_program = NFS4_CALLBACK,
5789 };
5790 struct nfs41_create_session_res res = {
5791 .client = clp,
5792 };
5793 struct rpc_message msg = {
5794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5795 .rpc_argp = &args,
5796 .rpc_resp = &res,
848f5bda 5797 .rpc_cred = cred,
fc931582
AA		 5798 };
5799 int status;
5800
5801 nfs4_init_channel_attrs(&args);
0f91421e 5802 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5803
1bd714f2 5804 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5805
8d35301d
AA		 5806 if (!status)
5807 /* Verify the session's negotiated channel_attrs values */
5808 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5809 if (!status) {
5810 /* Increment the clientid slot sequence id */
5811 clp->cl_seqid++;
5812 }
5813
5814 return status;
5815}
5816
5817/*
5818 * Issues a CREATE_SESSION operation to the server.
5819 * It is the responsibility of the caller to verify the session is
5820 * expired before calling this routine.
5821 */
848f5bda 5822int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5823{
5824 int status;
5825 unsigned *ptr;
fc931582
AA		 5826 struct nfs4_session *session = clp->cl_session;
5827
5828 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5829
848f5bda 5830 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5831 if (status)
5832 goto out;
5833
aacd5537
AA		 5834 /* Init or reset the session slot tables */
5835 status = nfs4_setup_session_slot_tables(session);
5836 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5837 if (status)
5838 goto out;
5839
5840 ptr = (unsigned *)&session->sess_id.data[0];
5841 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5842 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5843out:
5844 dprintk("<-- %s\n", __func__);
5845 return status;
5846}
5847
0f3e66c6
AA		 5848/*
5849 * Issue the over-the-wire RPC DESTROY_SESSION.
5850 * The caller must serialize access to this routine.
5851 */
848f5bda
TM		 5852int nfs4_proc_destroy_session(struct nfs4_session *session,
5853 struct rpc_cred *cred)
0f3e66c6 5854{
848f5bda
TM		 5855 struct rpc_message msg = {
5856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5857 .rpc_argp = session,
5858 .rpc_cred = cred,
5859 };
0f3e66c6 5860 int status = 0;
0f3e66c6
AA		 5861
5862 dprintk("--> nfs4_proc_destroy_session\n");
5863
5864 /* session is still being setup */
5865 if (session->clp->cl_cons_state != NFS_CS_READY)
5866 return status;
5867
1bd714f2 5868 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5869
5870 if (status)
08106ac7 5871 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5872 "Session has been destroyed regardless...\n", status);
5873
5874 dprintk("<-- nfs4_proc_destroy_session\n");
5875 return status;
5876}
5877
7b38c368
TM		 5878/*
5879 * With sessions, the client is not marked ready until after a
5880 * successful EXCHANGE_ID and CREATE_SESSION.
5881 *
5882 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5883 * other versions of NFS can be tried.
5884 */
5885static int nfs41_check_session_ready(struct nfs_client *clp)
5886{
5887 int ret;
5888
5889 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5890 ret = nfs4_client_recover_expired_lease(clp);
5891 if (ret)
5892 return ret;
5893 }
5894 if (clp->cl_cons_state < NFS_CS_READY)
5895 return -EPROTONOSUPPORT;
54ac471c 5896 smp_rmb();
7b38c368
TM		 5897 return 0;
5898}
5899
fccba804
TM		 5900int nfs4_init_session(struct nfs_server *server)
5901{
5902 struct nfs_client *clp = server->nfs_client;
2449ea2e 5903 struct nfs4_session *session;
68bf05ef 5904 unsigned int rsize, wsize;
fccba804
TM		 5905
5906 if (!nfs4_has_session(clp))
5907 return 0;
5908
1055d76d 5909 session = clp->cl_session;
7b38c368
TM		 5910 spin_lock(&clp->cl_lock);
5911 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5912
7b38c368
TM		 5913 rsize = server->rsize;
5914 if (rsize == 0)
5915 rsize = NFS_MAX_FILE_IO_SIZE;
5916 wsize = server->wsize;
5917 if (wsize == 0)
5918 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5919
7b38c368
TM		 5920 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5921 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5922 }
5923 spin_unlock(&clp->cl_lock);
2449ea2e 5924
7b38c368 5925 return nfs41_check_session_ready(clp);
fccba804
TM		 5926}
5927
7b38c368 5928int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5929{
5930 struct nfs4_session *session = clp->cl_session;
5931 int ret;
5932
7b38c368
TM		 5933 spin_lock(&clp->cl_lock);
5934 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5935 /*
5936 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5937 * DS lease to be equal to the MDS lease.
5938 */
5939 clp->cl_lease_time = lease_time;
5940 clp->cl_last_renewal = jiffies;
5941 }
5942 spin_unlock(&clp->cl_lock);
d83217c1 5943
7b38c368
TM		 5944 ret = nfs41_check_session_ready(clp);
5945 if (ret)
5946 return ret;
5947 /* Test for the DS role */
5948 if (!is_ds_client(clp))
5949 return -ENODEV;
5950 return 0;
d83217c1
AA		 5951}
5952EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5953
5954
fc01cea9
AA		 5955/*
5956 * Renew the cl_session lease.
5957 */
d5f8d3fe
TM		 5958struct nfs4_sequence_data {
5959 struct nfs_client *clp;
5960 struct nfs4_sequence_args args;
5961 struct nfs4_sequence_res res;
5962};
5963
dc96aef9
AB		 5964static void nfs41_sequence_release(void *data)
5965{
d5f8d3fe
TM		 5966 struct nfs4_sequence_data *calldata = data;
5967 struct nfs_client *clp = calldata->clp;
dc96aef9 5968
7135840f
AB		 5969 if (atomic_read(&clp->cl_count) > 1)
5970 nfs4_schedule_state_renewal(clp);
5971 nfs_put_client(clp);
d5f8d3fe 5972 kfree(calldata);
dc96aef9
AB		 5973}
5974
aa5190d0
TM		 5975static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5976{
5977 switch(task->tk_status) {
5978 case -NFS4ERR_DELAY:
aa5190d0
TM		 5979 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5980 return -EAGAIN;
5981 default:
0400a6b0 5982 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5983 }
5984 return 0;
5985}
5986
dc96aef9 5987static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5988{
d5f8d3fe
TM		 5989 struct nfs4_sequence_data *calldata = data;
5990 struct nfs_client *clp = calldata->clp;
fc01cea9 5991
14516c3a
TM		 5992 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5993 return;
fc01cea9
AA		 5994
5995 if (task->tk_status < 0) {
5996 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5997 if (atomic_read(&clp->cl_count) == 1)
5998 goto out;
fc01cea9 5999
aa5190d0
TM		 6000 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6001 rpc_restart_call_prepare(task);
fc01cea9
AA		 6002 return;
6003 }
6004 }
fc01cea9 6005 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6006out:
fc01cea9
AA		 6007 dprintk("<-- %s\n", __func__);
6008}
6009
6010static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6011{
d5f8d3fe
TM		 6012 struct nfs4_sequence_data *calldata = data;
6013 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6014 struct nfs4_sequence_args *args;
6015 struct nfs4_sequence_res *res;
6016
fc01cea9
AA		 6017 args = task->tk_msg.rpc_argp;
6018 res = task->tk_msg.rpc_resp;
6019
9d12b216 6020 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6021 return;
6022 rpc_call_start(task);
6023}
6024
6025static const struct rpc_call_ops nfs41_sequence_ops = {
6026 .rpc_call_done = nfs41_sequence_call_done,
6027 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6028 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6029};
6030
71ac6da9 6031static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 6032{
d5f8d3fe 6033 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6034 struct rpc_message msg = {
6035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6036 .rpc_cred = cred,
6037 };
71ac6da9
TM		 6038 struct rpc_task_setup task_setup_data = {
6039 .rpc_client = clp->cl_rpcclient,
6040 .rpc_message = &msg,
6041 .callback_ops = &nfs41_sequence_ops,
6042 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6043 };
fc01cea9 6044
7135840f 6045 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6046 return ERR_PTR(-EIO);
dfb4f309 6047 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6048 if (calldata == NULL) {
7135840f 6049 nfs_put_client(clp);
71ac6da9 6050 return ERR_PTR(-ENOMEM);
fc01cea9 6051 }
9d12b216 6052 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6053 msg.rpc_argp = &calldata->args;
6054 msg.rpc_resp = &calldata->res;
6055 calldata->clp = clp;
71ac6da9 6056 task_setup_data.callback_data = calldata;
fc01cea9 6057
71ac6da9
TM		 6058 return rpc_run_task(&task_setup_data);
6059}
6060
2f60ea6b 6061static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6062{
6063 struct rpc_task *task;
6064 int ret = 0;
6065
2f60ea6b
TM		 6066 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6067 return 0;
71ac6da9
TM		 6068 task = _nfs41_proc_sequence(clp, cred);
6069 if (IS_ERR(task))
6070 ret = PTR_ERR(task);
6071 else
bf294b41 6072 rpc_put_task_async(task);
71ac6da9
TM		 6073 dprintk("<-- %s status=%d\n", __func__, ret);
6074 return ret;
6075}
6076
6077static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6078{
6079 struct rpc_task *task;
6080 int ret;
6081
6082 task = _nfs41_proc_sequence(clp, cred);
6083 if (IS_ERR(task)) {
6084 ret = PTR_ERR(task);
6085 goto out;
6086 }
6087 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6088 if (!ret) {
6089 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6090
6091 if (task->tk_status == 0)
6092 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6093 ret = task->tk_status;
b4410c2f 6094 }
71ac6da9
TM		 6095 rpc_put_task(task);
6096out:
6097 dprintk("<-- %s status=%d\n", __func__, ret);
6098 return ret;
fc01cea9
AA		 6099}
6100
fce5c838
RL		 6101struct nfs4_reclaim_complete_data {
6102 struct nfs_client *clp;
6103 struct nfs41_reclaim_complete_args arg;
6104 struct nfs41_reclaim_complete_res res;
6105};
6106
6107static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6108{
6109 struct nfs4_reclaim_complete_data *calldata = data;
6110
b257957e 6111 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6112 if (nfs41_setup_sequence(calldata->clp->cl_session,
6113 &calldata->arg.seq_args,
9d12b216 6114 &calldata->res.seq_res, task))
fce5c838
RL		 6115 return;
6116
6117 rpc_call_start(task);
6118}
6119
aa5190d0
TM		 6120static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6121{
6122 switch(task->tk_status) {
6123 case 0:
6124 case -NFS4ERR_COMPLETE_ALREADY:
6125 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6126 break;
6127 case -NFS4ERR_DELAY:
aa5190d0 6128 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6129 /* fall through */
6130 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6131 return -EAGAIN;
6132 default:
0400a6b0 6133 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6134 }
6135 return 0;
6136}
6137
fce5c838
RL		 6138static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6139{
6140 struct nfs4_reclaim_complete_data *calldata = data;
6141 struct nfs_client *clp = calldata->clp;
6142 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6143
6144 dprintk("--> %s\n", __func__);
14516c3a
TM		 6145 if (!nfs41_sequence_done(task, res))
6146 return;
fce5c838 6147
aa5190d0
TM		 6148 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6149 rpc_restart_call_prepare(task);
6150 return;
6151 }
fce5c838
RL		 6152 dprintk("<-- %s\n", __func__);
6153}
6154
6155static void nfs4_free_reclaim_complete_data(void *data)
6156{
6157 struct nfs4_reclaim_complete_data *calldata = data;
6158
6159 kfree(calldata);
6160}
6161
6162static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6163 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6164 .rpc_call_done = nfs4_reclaim_complete_done,
6165 .rpc_release = nfs4_free_reclaim_complete_data,
6166};
6167
6168/*
6169 * Issue a global reclaim complete.
6170 */
6171static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6172{
6173 struct nfs4_reclaim_complete_data *calldata;
6174 struct rpc_task *task;
6175 struct rpc_message msg = {
6176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6177 };
6178 struct rpc_task_setup task_setup_data = {
6179 .rpc_client = clp->cl_rpcclient,
6180 .rpc_message = &msg,
6181 .callback_ops = &nfs4_reclaim_complete_call_ops,
6182 .flags = RPC_TASK_ASYNC,
6183 };
6184 int status = -ENOMEM;
6185
6186 dprintk("--> %s\n", __func__);
8535b2be 6187 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6188 if (calldata == NULL)
6189 goto out;
6190 calldata->clp = clp;
6191 calldata->arg.one_fs = 0;
fce5c838 6192
9d12b216 6193 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6194 msg.rpc_argp = &calldata->arg;
6195 msg.rpc_resp = &calldata->res;
6196 task_setup_data.callback_data = calldata;
6197 task = rpc_run_task(&task_setup_data);
acf82b85 6198 if (IS_ERR(task)) {
fce5c838 6199 status = PTR_ERR(task);
acf82b85
DC		 6200 goto out;
6201 }
c34c32ea
AA		 6202 status = nfs4_wait_for_completion_rpc_task(task);
6203 if (status == 0)
6204 status = task->tk_status;
fce5c838 6205 rpc_put_task(task);
acf82b85 6206 return 0;
fce5c838
RL		 6207out:
6208 dprintk("<-- %s status=%d\n", __func__, status);
6209 return status;
6210}
b1f69b75
AA		 6211
6212static void
6213nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6214{
6215 struct nfs4_layoutget *lgp = calldata;
c31663d4 6216 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6217
6218 dprintk("--> %s\n", __func__);
c31663d4
FI		 6219 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6220 * right now covering the LAYOUTGET we are about to send.
6221 * However, that is not so catastrophic, and there seems
6222 * to be no way to prevent it completely.
6223 */
b1f69b75 6224 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6225 &lgp->res.seq_res, task))
b1f69b75 6226 return;
cf7d63f1
FI		 6227 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6228 NFS_I(lgp->args.inode)->layout,
6229 lgp->args.ctx->state)) {
6230 rpc_exit(task, NFS4_OK);
6231 return;
6232 }
b1f69b75
AA		 6233 rpc_call_start(task);
6234}
6235
6236static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6237{
6238 struct nfs4_layoutget *lgp = calldata;
6239 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6240
6241 dprintk("--> %s\n", __func__);
6242
6243 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6244 return;
6245
6246 switch (task->tk_status) {
6247 case 0:
6248 break;
6249 case -NFS4ERR_LAYOUTTRYLATER:
6250 case -NFS4ERR_RECALLCONFLICT:
6251 task->tk_status = -NFS4ERR_DELAY;
6252 /* Fall through */
6253 default:
6254 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6255 rpc_restart_call_prepare(task);
6256 return;
6257 }
6258 }
b1f69b75
AA		 6259 dprintk("<-- %s\n", __func__);
6260}
6261
8554116e
IK		 6262static size_t max_response_pages(struct nfs_server *server)
6263{
6264 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6265 return nfs_page_array_len(0, max_resp_sz);
6266}
6267
6268static void nfs4_free_pages(struct page **pages, size_t size)
6269{
6270 int i;
6271
6272 if (!pages)
6273 return;
6274
6275 for (i = 0; i < size; i++) {
6276 if (!pages[i])
6277 break;
6278 __free_page(pages[i]);
6279 }
6280 kfree(pages);
6281}
6282
6283static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6284{
6285 struct page **pages;
6286 int i;
6287
6288 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6289 if (!pages) {
6290 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6291 return NULL;
6292 }
6293
6294 for (i = 0; i < size; i++) {
6295 pages[i] = alloc_page(gfp_flags);
6296 if (!pages[i]) {
6297 dprintk("%s: failed to allocate page\n", __func__);
6298 nfs4_free_pages(pages, size);
6299 return NULL;
6300 }
6301 }
6302
6303 return pages;
6304}
6305
b1f69b75
AA		 6306static void nfs4_layoutget_release(void *calldata)
6307{
6308 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6309 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6310 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6311
6312 dprintk("--> %s\n", __func__);
8554116e 6313 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6314 put_nfs_open_context(lgp->args.ctx);
6315 kfree(calldata);
6316 dprintk("<-- %s\n", __func__);
6317}
6318
6319static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6320 .rpc_call_prepare = nfs4_layoutget_prepare,
6321 .rpc_call_done = nfs4_layoutget_done,
6322 .rpc_release = nfs4_layoutget_release,
6323};
6324
a0b0a6e3
TM		 6325struct pnfs_layout_segment *
6326nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6327{
6328 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6329 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6330 struct rpc_task *task;
6331 struct rpc_message msg = {
6332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6333 .rpc_argp = &lgp->args,
6334 .rpc_resp = &lgp->res,
6335 };
6336 struct rpc_task_setup task_setup_data = {
6337 .rpc_client = server->client,
6338 .rpc_message = &msg,
6339 .callback_ops = &nfs4_layoutget_call_ops,
6340 .callback_data = lgp,
6341 .flags = RPC_TASK_ASYNC,
6342 };
a0b0a6e3 6343 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6344 int status = 0;
6345
6346 dprintk("--> %s\n", __func__);
6347
8554116e
IK		 6348 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6349 if (!lgp->args.layout.pages) {
6350 nfs4_layoutget_release(lgp);
a0b0a6e3 6351 return ERR_PTR(-ENOMEM);
8554116e
IK		 6352 }
6353 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6354
35124a09 6355 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6356 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6357 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6358 task = rpc_run_task(&task_setup_data);
6359 if (IS_ERR(task))
a0b0a6e3 6360 return ERR_CAST(task);
b1f69b75 6361 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6362 if (status == 0)
6363 status = task->tk_status;
6364 if (status == 0)
a0b0a6e3 6365 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6366 rpc_put_task(task);
6367 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6368 if (status)
6369 return ERR_PTR(status);
6370 return lseg;
b1f69b75
AA		 6371}
6372
cbe82603
BH		 6373static void
6374nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6375{
6376 struct nfs4_layoutreturn *lrp = calldata;
6377
6378 dprintk("--> %s\n", __func__);
6379 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6380 &lrp->res.seq_res, task))
cbe82603
BH		 6381 return;
6382 rpc_call_start(task);
6383}
6384
6385static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6386{
6387 struct nfs4_layoutreturn *lrp = calldata;
6388 struct nfs_server *server;
6389
6390 dprintk("--> %s\n", __func__);
6391
6392 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6393 return;
6394
6395 server = NFS_SERVER(lrp->args.inode);
6396 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6397 rpc_restart_call_prepare(task);
cbe82603
BH		 6398 return;
6399 }
cbe82603
BH		 6400 dprintk("<-- %s\n", __func__);
6401}
6402
6403static void nfs4_layoutreturn_release(void *calldata)
6404{
6405 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6406 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6407
6408 dprintk("--> %s\n", __func__);
849b286f
TM		 6409 spin_lock(&lo->plh_inode->i_lock);
6410 if (lrp->res.lrs_present)
6411 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6412 lo->plh_block_lgets--;
6413 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6414 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6415 kfree(calldata);
6416 dprintk("<-- %s\n", __func__);
6417}
6418
6419static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6420 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6421 .rpc_call_done = nfs4_layoutreturn_done,
6422 .rpc_release = nfs4_layoutreturn_release,
6423};
6424
6425int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6426{
6427 struct rpc_task *task;
6428 struct rpc_message msg = {
6429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6430 .rpc_argp = &lrp->args,
6431 .rpc_resp = &lrp->res,
6432 };
6433 struct rpc_task_setup task_setup_data = {
6434 .rpc_client = lrp->clp->cl_rpcclient,
6435 .rpc_message = &msg,
6436 .callback_ops = &nfs4_layoutreturn_call_ops,
6437 .callback_data = lrp,
6438 };
6439 int status;
6440
6441 dprintk("--> %s\n", __func__);
9d12b216 6442 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6443 task = rpc_run_task(&task_setup_data);
6444 if (IS_ERR(task))
6445 return PTR_ERR(task);
6446 status = task->tk_status;
6447 dprintk("<-- %s status=%d\n", __func__, status);
6448 rpc_put_task(task);
6449 return status;
6450}
6451
7f11d8d3
AA		 6452/*
6453 * Retrieve the list of Data Server devices from the MDS.
6454 */
6455static int _nfs4_getdevicelist(struct nfs_server *server,
6456 const struct nfs_fh *fh,
6457 struct pnfs_devicelist *devlist)
6458{
6459 struct nfs4_getdevicelist_args args = {
6460 .fh = fh,
6461 .layoutclass = server->pnfs_curr_ld->id,
6462 };
6463 struct nfs4_getdevicelist_res res = {
6464 .devlist = devlist,
6465 };
6466 struct rpc_message msg = {
6467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6468 .rpc_argp = &args,
6469 .rpc_resp = &res,
6470 };
6471 int status;
6472
6473 dprintk("--> %s\n", __func__);
6474 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6475 &res.seq_res, 0);
6476 dprintk("<-- %s status=%d\n", __func__, status);
6477 return status;
6478}
6479
6480int nfs4_proc_getdevicelist(struct nfs_server *server,
6481 const struct nfs_fh *fh,
6482 struct pnfs_devicelist *devlist)
6483{
6484 struct nfs4_exception exception = { };
6485 int err;
6486
6487 do {
6488 err = nfs4_handle_exception(server,
6489 _nfs4_getdevicelist(server, fh, devlist),
6490 &exception);
6491 } while (exception.retry);
6492
6493 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6494 err, devlist->num_devs);
6495
6496 return err;
6497}
6498EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6499
b1f69b75
AA		 6500static int
6501_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6502{
6503 struct nfs4_getdeviceinfo_args args = {
6504 .pdev = pdev,
6505 };
6506 struct nfs4_getdeviceinfo_res res = {
6507 .pdev = pdev,
6508 };
6509 struct rpc_message msg = {
6510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6511 .rpc_argp = &args,
6512 .rpc_resp = &res,
6513 };
6514 int status;
6515
6516 dprintk("--> %s\n", __func__);
7c513058 6517 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6518 dprintk("<-- %s status=%d\n", __func__, status);
6519
6520 return status;
6521}
6522
6523int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6524{
6525 struct nfs4_exception exception = { };
6526 int err;
6527
6528 do {
6529 err = nfs4_handle_exception(server,
6530 _nfs4_proc_getdeviceinfo(server, pdev),
6531 &exception);
6532 } while (exception.retry);
6533 return err;
6534}
6535EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6536
863a3c6c
AA		 6537static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6538{
6539 struct nfs4_layoutcommit_data *data = calldata;
6540 struct nfs_server *server = NFS_SERVER(data->args.inode);
6541
6542 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6543 &data->res.seq_res, task))
863a3c6c
AA		 6544 return;
6545 rpc_call_start(task);
6546}
6547
6548static void
6549nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6550{
6551 struct nfs4_layoutcommit_data *data = calldata;
6552 struct nfs_server *server = NFS_SERVER(data->args.inode);
6553
6554 if (!nfs4_sequence_done(task, &data->res.seq_res))
6555 return;
6556
6557 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6558 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6559 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6560 case -NFS4ERR_BADLAYOUT: /* no layout */
6561 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6562 task->tk_status = 0;
e59d27e0
TM		 6563 break;
6564 case 0:
863a3c6c
AA		 6565 nfs_post_op_update_inode_force_wcc(data->args.inode,
6566 data->res.fattr);
e59d27e0
TM		 6567 break;
6568 default:
6569 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6570 rpc_restart_call_prepare(task);
6571 return;
6572 }
6573 }
863a3c6c
AA		 6574}
6575
6576static void nfs4_layoutcommit_release(void *calldata)
6577{
6578 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6579 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6580 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6581
db29c089 6582 pnfs_cleanup_layoutcommit(data);
863a3c6c 6583 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6584 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6585 list_del_init(&lseg->pls_lc_list);
6586 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6587 &lseg->pls_flags))
9369a431 6588 pnfs_put_lseg(lseg);
a9bae566 6589 }
92407e75
PT		 6590
6591 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6592 smp_mb__after_clear_bit();
6593 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6594
863a3c6c
AA		 6595 put_rpccred(data->cred);
6596 kfree(data);
6597}
6598
6599static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6600 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6601 .rpc_call_done = nfs4_layoutcommit_done,
6602 .rpc_release = nfs4_layoutcommit_release,
6603};
6604
6605int
ef311537 6606nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6607{
6608 struct rpc_message msg = {
6609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6610 .rpc_argp = &data->args,
6611 .rpc_resp = &data->res,
6612 .rpc_cred = data->cred,
6613 };
6614 struct rpc_task_setup task_setup_data = {
6615 .task = &data->task,
6616 .rpc_client = NFS_CLIENT(data->args.inode),
6617 .rpc_message = &msg,
6618 .callback_ops = &nfs4_layoutcommit_ops,
6619 .callback_data = data,
6620 .flags = RPC_TASK_ASYNC,
6621 };
6622 struct rpc_task *task;
6623 int status = 0;
6624
6625 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6626 "lbw: %llu inode %lu\n",
6627 data->task.tk_pid, sync,
6628 data->args.lastbytewritten,
6629 data->args.inode->i_ino);
6630
9d12b216 6631 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6632 task = rpc_run_task(&task_setup_data);
6633 if (IS_ERR(task))
6634 return PTR_ERR(task);
ef311537 6635 if (sync == false)
863a3c6c
AA		 6636 goto out;
6637 status = nfs4_wait_for_completion_rpc_task(task);
6638 if (status != 0)
6639 goto out;
6640 status = task->tk_status;
6641out:
6642 dprintk("%s: status %d\n", __func__, status);
6643 rpc_put_task(task);
6644 return status;
6645}
fca78d6d
BS		 6646
6647static int
6648_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6649 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6650{
6651 struct nfs41_secinfo_no_name_args args = {
6652 .style = SECINFO_STYLE_CURRENT_FH,
6653 };
6654 struct nfs4_secinfo_res res = {
6655 .flavors = flavors,
6656 };
6657 struct rpc_message msg = {
6658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6659 .rpc_argp = &args,
6660 .rpc_resp = &res,
6661 };
6662 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6663}
6664
6665static int
6666nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6667 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6668{
6669 struct nfs4_exception exception = { };
6670 int err;
6671 do {
6672 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6673 switch (err) {
6674 case 0:
6675 case -NFS4ERR_WRONGSEC:
6676 case -NFS4ERR_NOTSUPP:
05e9cfb4 6677 goto out;
fca78d6d
BS		 6678 default:
6679 err = nfs4_handle_exception(server, err, &exception);
6680 }
6681 } while (exception.retry);
05e9cfb4 6682out:
fca78d6d
BS		 6683 return err;
6684}
6685
6686static int
6687nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6688 struct nfs_fsinfo *info)
6689{
6690 int err;
6691 struct page *page;
6692 rpc_authflavor_t flavor;
6693 struct nfs4_secinfo_flavors *flavors;
6694
6695 page = alloc_page(GFP_KERNEL);
6696 if (!page) {
6697 err = -ENOMEM;
6698 goto out;
6699 }
6700
6701 flavors = page_address(page);
6702 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6703
6704 /*
6705 * Fall back on "guess and check" method if
6706 * the server doesn't support SECINFO_NO_NAME
6707 */
6708 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6709 err = nfs4_find_root_sec(server, fhandle, info);
6710 goto out_freepage;
6711 }
6712 if (err)
6713 goto out_freepage;
6714
6715 flavor = nfs_find_best_sec(flavors);
6716 if (err == 0)
6717 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6718
6719out_freepage:
6720 put_page(page);
6721 if (err == -EACCES)
6722 return -EPERM;
6723out:
6724 return err;
6725}
1cab0652
BS		 6726
6727static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6728{
6729 int status;
6730 struct nfs41_test_stateid_args args = {
1cab0652 6731 .stateid = stateid,
7d974794
BS		 6732 };
6733 struct nfs41_test_stateid_res res;
6734 struct rpc_message msg = {
6735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6736 .rpc_argp = &args,
6737 .rpc_resp = &res,
6738 };
1cab0652 6739
38527b15 6740 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6741 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6742 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6743 if (status != NFS_OK) {
6744 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6745 return status;
38527b15
CL		 6746 }
6747 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6748 return -res.status;
7d974794
BS		 6749}
6750
38527b15
CL		 6751/**
6752 * nfs41_test_stateid - perform a TEST_STATEID operation
6753 *
6754 * @server: server / transport on which to perform the operation
6755 * @stateid: state ID to test
6756 *
6757 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6758 * Otherwise a negative NFS4ERR value is returned if the operation
6759 * failed or the state ID is not currently valid.
6760 */
1cab0652 6761static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6762{
6763 struct nfs4_exception exception = { };
6764 int err;
6765 do {
377e507d
CL		 6766 err = _nfs41_test_stateid(server, stateid);
6767 if (err != -NFS4ERR_DELAY)
6768 break;
6769 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6770 } while (exception.retry);
6771 return err;
6772}
9aeda35f 6773
1cab0652 6774static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6775{
9aeda35f 6776 struct nfs41_free_stateid_args args = {
1cab0652 6777 .stateid = stateid,
9aeda35f
BS		 6778 };
6779 struct nfs41_free_stateid_res res;
6780 struct rpc_message msg = {
6781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6782 .rpc_argp = &args,
6783 .rpc_resp = &res,
6784 };
38527b15 6785 int status;
9aeda35f 6786
38527b15 6787 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6788 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6789 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6790 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6791 dprintk("NFS reply free_stateid: %d\n", status);
6792 return status;
9aeda35f
BS		 6793}
6794
38527b15
CL		 6795/**
6796 * nfs41_free_stateid - perform a FREE_STATEID operation
6797 *
6798 * @server: server / transport on which to perform the operation
6799 * @stateid: state ID to release
6800 *
6801 * Returns NFS_OK if the server freed "stateid". Otherwise a
6802 * negative NFS4ERR value is returned.
6803 */
1cab0652 6804static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6805{
6806 struct nfs4_exception exception = { };
6807 int err;
6808 do {
377e507d
CL		 6809 err = _nfs4_free_stateid(server, stateid);
6810 if (err != -NFS4ERR_DELAY)
6811 break;
6812 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6813 } while (exception.retry);
6814 return err;
6815}
36281caa
TM		 6816
6817static bool nfs41_match_stateid(const nfs4_stateid *s1,
6818 const nfs4_stateid *s2)
6819{
2d2f24ad 6820 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6821 return false;
6822
2d2f24ad 6823 if (s1->seqid == s2->seqid)
36281caa 6824 return true;
2d2f24ad 6825 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6826 return true;
6827
6828 return false;
6829}
6830
557134a3
AA		 6831#endif /* CONFIG_NFS_V4_1 */
6832
36281caa
TM		 6833static bool nfs4_match_stateid(const nfs4_stateid *s1,
6834 const nfs4_stateid *s2)
6835{
f597c537 6836 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6837}
6838
6839
17280175 6840static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6841 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6842 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6843 .recover_open = nfs4_open_reclaim,
6844 .recover_lock = nfs4_lock_reclaim,
591d71cb 6845 .establish_clid = nfs4_init_clientid,
90a16617 6846 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6847};
6848
591d71cb 6849#if defined(CONFIG_NFS_V4_1)
17280175 6850static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6851 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6852 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6853 .recover_open = nfs4_open_reclaim,
6854 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6855 .establish_clid = nfs41_init_clientid,
b4b82607 6856 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6857 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6858};
6859#endif /* CONFIG_NFS_V4_1 */
6860
17280175 6861static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6862 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6863 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6864 .recover_open = nfs4_open_expired,
6865 .recover_lock = nfs4_lock_expired,
6866 .establish_clid = nfs4_init_clientid,
90a16617 6867 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6868};
6869
6870#if defined(CONFIG_NFS_V4_1)
17280175 6871static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6872 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6873 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6874 .recover_open = nfs41_open_expired,
6875 .recover_lock = nfs41_lock_expired,
4d643d1d 6876 .establish_clid = nfs41_init_clientid,
b4b82607 6877 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6878};
591d71cb 6879#endif /* CONFIG_NFS_V4_1 */
1da177e4 6880
17280175 6881static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6882 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6883 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6884 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6885};
6886
6887#if defined(CONFIG_NFS_V4_1)
17280175 6888static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6889 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6890 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6891 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6892};
6893#endif
6894
97dc1359
TM		 6895static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6896 .minor_version = 0,
6897 .call_sync = _nfs4_call_sync,
36281caa 6898 .match_stateid = nfs4_match_stateid,
fca78d6d 6899 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6900 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6901 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6902 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6903};
6904
6905#if defined(CONFIG_NFS_V4_1)
6906static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6907 .minor_version = 1,
6908 .call_sync = _nfs4_call_sync_session,
36281caa 6909 .match_stateid = nfs41_match_stateid,
fca78d6d 6910 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6911 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6912 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6913 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6914};
6915#endif
6916
97dc1359
TM		 6917const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6918 [0] = &nfs_v4_0_minor_ops,
6919#if defined(CONFIG_NFS_V4_1)
6920 [1] = &nfs_v4_1_minor_ops,
6921#endif
6922};
6923
73a79706
BS		 6924const struct inode_operations nfs4_dir_inode_operations = {
6925 .create = nfs_create,
6926 .lookup = nfs_lookup,
6927 .atomic_open = nfs_atomic_open,
6928 .link = nfs_link,
6929 .unlink = nfs_unlink,
6930 .symlink = nfs_symlink,
6931 .mkdir = nfs_mkdir,
6932 .rmdir = nfs_rmdir,
6933 .mknod = nfs_mknod,
6934 .rename = nfs_rename,
6935 .permission = nfs_permission,
6936 .getattr = nfs_getattr,
6937 .setattr = nfs_setattr,
6938 .getxattr = generic_getxattr,
6939 .setxattr = generic_setxattr,
6940 .listxattr = generic_listxattr,
6941 .removexattr = generic_removexattr,
6942};
6943
92e1d5be 6944static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6945 .permission = nfs_permission,
6946 .getattr = nfs_getattr,
6947 .setattr = nfs_setattr,
64c2ce8b
AK		 6948 .getxattr = generic_getxattr,
6949 .setxattr = generic_setxattr,
6950 .listxattr = generic_listxattr,
6951 .removexattr = generic_removexattr,
6b3b5496
BF		 6952};
6953
509de811 6954const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6955 .version = 4, /* protocol version */
6956 .dentry_ops = &nfs4_dentry_operations,
6957 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6958 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6959 .file_ops = &nfs4_file_operations,
1da177e4 6960 .getroot = nfs4_proc_get_root,
281cad46 6961 .submount = nfs4_submount,
ff9099f2 6962 .try_mount = nfs4_try_mount,
1da177e4
LT		 6963 .getattr = nfs4_proc_getattr,
6964 .setattr = nfs4_proc_setattr,
6965 .lookup = nfs4_proc_lookup,
6966 .access = nfs4_proc_access,
6967 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6968 .create = nfs4_proc_create,
6969 .remove = nfs4_proc_remove,
6970 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6971 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6972 .unlink_done = nfs4_proc_unlink_done,
6973 .rename = nfs4_proc_rename,
d3d4152a 6974 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6975 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6976 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6977 .link = nfs4_proc_link,
6978 .symlink = nfs4_proc_symlink,
6979 .mkdir = nfs4_proc_mkdir,
6980 .rmdir = nfs4_proc_remove,
6981 .readdir = nfs4_proc_readdir,
6982 .mknod = nfs4_proc_mknod,
6983 .statfs = nfs4_proc_statfs,
6984 .fsinfo = nfs4_proc_fsinfo,
6985 .pathconf = nfs4_proc_pathconf,
e9326dca 6986 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6987 .decode_dirent = nfs4_decode_dirent,
6988 .read_setup = nfs4_proc_read_setup,
1abb5088 6989 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6990 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6991 .read_done = nfs4_read_done,
1da177e4 6992 .write_setup = nfs4_proc_write_setup,
57208fa7 6993 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6994 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6995 .write_done = nfs4_write_done,
1da177e4 6996 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6997 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6998 .commit_done = nfs4_commit_done,
1da177e4 6999 .lock = nfs4_proc_lock,
e50a1c2e 7000 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7001 .close_context = nfs4_close_context,
2b484297 7002 .open_context = nfs4_atomic_open,
011e2a7f 7003 .have_delegation = nfs4_have_delegation,
57ec14c5 7004 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7005 .alloc_client = nfs4_alloc_client,
45a52a02 7006 .init_client = nfs4_init_client,
cdb7eced 7007 .free_client = nfs4_free_client,
1179acc6
BS		 7008 .create_server = nfs4_create_server,
7009 .clone_server = nfs_clone_server,
1da177e4
LT		 7010};
7011
64c2ce8b
AK		 7012static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7013 .prefix = XATTR_NAME_NFSV4_ACL,
7014 .list = nfs4_xattr_list_nfs4_acl,
7015 .get = nfs4_xattr_get_nfs4_acl,
7016 .set = nfs4_xattr_set_nfs4_acl,
7017};
7018
7019const struct xattr_handler *nfs4_xattr_handlers[] = {
7020 &nfs4_xattr_nfs4_acl_handler,
7021 NULL
7022};
7023
1da177e4
LT		 7024/*
7025 * Local variables:
7026 * c-basic-offset: 8
7027 * End:
7028 */
Linux 6.x block layer and io_uring tree(s)