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NFS: Fix a typo in _nfs_display_fhandle
[deliverable/linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
ef159e91
TM		 75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
9936781d 83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
f062eb6c 87#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 88static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 90#endif
1da177e4 91/* Prevent leaks of NFSv4 errors into userland */
46f72f57 92static int nfs4_map_errors(int err)
1da177e4 93{
52567b03
TM		 94 if (err >= -1000)
95 return err;
96 switch (err) {
97 case -NFS4ERR_RESOURCE:
98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
52567b03 104 default:
1da177e4 105 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 106 __func__, -err);
52567b03 107 break;
1da177e4 108 }
52567b03 109 return -EIO;
1da177e4
LT		 110}
111
112/*
113 * This is our standard bitmap for GETATTR requests.
114 */
115const u32 nfs4_fattr_bitmap[2] = {
116 FATTR4_WORD0_TYPE
117 | FATTR4_WORD0_CHANGE
118 | FATTR4_WORD0_SIZE
119 | FATTR4_WORD0_FSID
120 | FATTR4_WORD0_FILEID,
121 FATTR4_WORD1_MODE
122 | FATTR4_WORD1_NUMLINKS
123 | FATTR4_WORD1_OWNER
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
130};
131
132const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
139};
140
4ce79717 141const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 142 FATTR4_WORD0_MAXLINK
143 | FATTR4_WORD0_MAXNAME,
144 0
145};
146
dae100c2 147const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
55b6e774 151 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 154};
155
830b8e33
MN		 156const u32 nfs4_fs_locations_bitmap[2] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_SIZE
160 | FATTR4_WORD0_FSID
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
163 FATTR4_WORD1_MODE
164 | FATTR4_WORD1_NUMLINKS
165 | FATTR4_WORD1_OWNER
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
173};
174
bc4785cd 175static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 176 struct nfs4_readdir_arg *readdir)
177{
0dbb4c67 178 __be32 *start, *p;
1da177e4
LT		 179
180 BUG_ON(readdir->count < 80);
181 if (cookie > 2) {
b7ef1956 182 readdir->cookie = cookie;
1da177e4
LT		 183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
184 return;
185 }
186
187 readdir->cookie = 0;
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
189 if (cookie == 2)
190 return;
191
192 /*
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
197 * instead of 1 or 2.
198 */
0dbb4c67 199 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 200
201 if (cookie == 0) {
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
207 p++;
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
4e769b93 211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 212 }
213
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
219 p++;
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
4e769b93 223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 224
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start, KM_USER0);
228}
229
65de872e
TM		 230static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231{
232 int res;
233
234 might_sleep();
235
e005e804 236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 237 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 238 return res;
239}
240
241static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
242{
243 int res = 0;
244
245 might_sleep();
246
247 if (*timeout <= 0)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 251 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 252 if (fatal_signal_pending(current))
253 res = -ERESTARTSYS;
254 *timeout <<= 1;
255 return res;
256}
257
258/* This is the error handling routine for processes that are allowed
259 * to sleep.
260 */
b064eca2 261static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 262{
263 struct nfs_client *clp = server->nfs_client;
9e33bed5 264 struct nfs4_state *state = exception->state;
65de872e
TM		 265 int ret = errorcode;
266
267 exception->retry = 0;
268 switch(errorcode) {
269 case 0:
270 return 0;
9e33bed5
TM		 271 case -NFS4ERR_ADMIN_REVOKED:
272 case -NFS4ERR_BAD_STATEID:
273 case -NFS4ERR_OPENMODE:
274 if (state == NULL)
275 break;
0400a6b0
TM		 276 nfs4_schedule_stateid_recovery(server, state);
277 goto wait_on_recovery;
0ced63d1
TM		 278 case -NFS4ERR_EXPIRED:
279 if (state != NULL)
280 nfs4_schedule_stateid_recovery(server, state);
65de872e 281 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 282 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 283 nfs4_schedule_lease_recovery(clp);
284 goto wait_on_recovery;
03391693 285#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 286 case -NFS4ERR_BADSESSION:
287 case -NFS4ERR_BADSLOT:
288 case -NFS4ERR_BAD_HIGH_SLOT:
289 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
290 case -NFS4ERR_DEADSESSION:
291 case -NFS4ERR_SEQ_FALSE_RETRY:
292 case -NFS4ERR_SEQ_MISORDERED:
293 dprintk("%s ERROR: %d Reset session\n", __func__,
294 errorcode);
0400a6b0 295 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 296 exception->retry = 1;
b9179237 297 break;
03391693 298#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 299 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 300 if (exception->timeout > HZ) {
301 /* We have retried a decent amount, time to
302 * fail
303 */
304 ret = -EBUSY;
305 break;
306 }
65de872e
TM		 307 case -NFS4ERR_GRACE:
308 case -NFS4ERR_DELAY:
2c643488 309 case -EKEYEXPIRED:
65de872e
TM		 310 ret = nfs4_delay(server->client, &exception->timeout);
311 if (ret != 0)
312 break;
a8a4ae3a 313 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 314 case -NFS4ERR_OLD_STATEID:
315 exception->retry = 1;
b064eca2
TM		 316 break;
317 case -NFS4ERR_BADOWNER:
318 /* The following works around a Linux server bug! */
319 case -NFS4ERR_BADNAME:
320 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
321 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
322 exception->retry = 1;
323 printk(KERN_WARNING "NFS: v4 server %s "
324 "does not accept raw "
325 "uid/gids. "
326 "Reenabling the idmapper.\n",
327 server->nfs_client->cl_hostname);
328 }
65de872e
TM		 329 }
330 /* We failed to handle the error */
331 return nfs4_map_errors(ret);
0400a6b0 332wait_on_recovery:
a2c0b9e2
TM		 333 ret = nfs4_wait_clnt_recover(clp);
334 if (ret == 0)
335 exception->retry = 1;
336 return ret;
65de872e
TM		 337}
338
339
452e9352 340static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 341{
1da177e4
LT		 342 spin_lock(&clp->cl_lock);
343 if (time_before(clp->cl_last_renewal,timestamp))
344 clp->cl_last_renewal = timestamp;
345 spin_unlock(&clp->cl_lock);
346}
347
452e9352
TM		 348static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
349{
350 do_renew_lease(server->nfs_client, timestamp);
351}
352
cccef3b9
AA		 353#if defined(CONFIG_NFS_V4_1)
354
e2c4ab3c
AA		 355/*
356 * nfs4_free_slot - free a slot and efficiently update slot table.
357 *
358 * freeing a slot is trivially done by clearing its respective bit
359 * in the bitmap.
360 * If the freed slotid equals highest_used_slotid we want to update it
361 * so that the server would be able to size down the slot table if needed,
362 * otherwise we know that the highest_used_slotid is still in use.
363 * When updating highest_used_slotid there may be "holes" in the bitmap
364 * so we need to scan down from highest_used_slotid to 0 looking for the now
365 * highest slotid in use.
45d43c29 366 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 367 *
368 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 369 */
370static void
45d43c29 371nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 372{
45d43c29 373 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 374 /* clear used bit in bitmap */
375 __clear_bit(slotid, tbl->used_slots);
376
377 /* update highest_used_slotid when it is freed */
378 if (slotid == tbl->highest_used_slotid) {
379 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 380 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 381 tbl->highest_used_slotid = slotid;
382 else
45d43c29 383 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 384 }
45d43c29
TM		 385 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
386 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 387}
388
961a828d
TM		 389bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
390{
391 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
392 return true;
393}
394
3bfb0fc5 395/*
42acd021 396 * Signal state manager thread if session fore channel is drained
3bfb0fc5 397 */
42acd021 398static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 399{
a2118c33 400 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 401 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
402 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 403 return;
404 }
405
45d43c29 406 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 407 return;
408
42acd021
AA		 409 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
410 complete(&ses->fc_slot_table.complete);
411}
412
413/*
414 * Signal state manager thread if session back channel is drained
415 */
416void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
417{
418 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 419 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 420 return;
421 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
422 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 423}
424
d185a334 425static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 426{
427 struct nfs4_slot_table *tbl;
428
d185a334 429 tbl = &res->sr_session->fc_slot_table;
dfb4f309 430 if (!res->sr_slot) {
13615871
AA		 431 /* just wake up the next guy waiting since
432 * we may have not consumed a slot after all */
691daf3b 433 dprintk("%s: No slot\n", __func__);
35dc1d74 434 return;
13615871 435 }
ea028ac9 436
35dc1d74 437 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 438 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 439 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 440 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 441 res->sr_slot = NULL;
13615871
AA		 442}
443
14516c3a 444static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 445{
446 unsigned long timestamp;
14516c3a 447 struct nfs_client *clp;
b0df806c
AA		 448
449 /*
450 * sr_status remains 1 if an RPC level error occurred. The server
451 * may or may not have processed the sequence operation..
452 * Proceed as if the server received and processed the sequence
453 * operation.
454 */
455 if (res->sr_status == 1)
456 res->sr_status = NFS_OK;
457
468f8613
BS		 458 /* don't increment the sequence number if the task wasn't sent */
459 if (!RPC_WAS_SENT(task))
b0df806c
AA		 460 goto out;
461
691daf3b 462 /* Check the SEQUENCE operation status */
14516c3a
TM		 463 switch (res->sr_status) {
464 case 0:
b0df806c 465 /* Update the slot's sequence and clientid lease timer */
dfb4f309 466 ++res->sr_slot->seq_nr;
b0df806c 467 timestamp = res->sr_renewal_time;
14516c3a 468 clp = res->sr_session->clp;
452e9352 469 do_renew_lease(clp, timestamp);
0629e370 470 /* Check sequence flags */
b4410c2f
TM		 471 if (res->sr_status_flags != 0)
472 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 473 break;
474 case -NFS4ERR_DELAY:
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
477 * of RFC5661.
478 */
12364a4f 479 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 480 __func__,
481 res->sr_slot - res->sr_session->fc_slot_table.slots,
482 res->sr_slot->seq_nr);
14516c3a
TM		 483 goto out_retry;
484 default:
485 /* Just update the slot sequence no. */
dfb4f309 486 ++res->sr_slot->seq_nr;
b0df806c
AA		 487 }
488out:
489 /* The session may be reset by one of the error handlers. */
490 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 491 nfs41_sequence_free_slot(res);
14516c3a
TM		 492 return 1;
493out_retry:
d05dd4e9 494 if (!rpc_restart_call(task))
14516c3a
TM		 495 goto out;
496 rpc_delay(task, NFS4_POLL_RETRY_MAX);
497 return 0;
b0df806c
AA		 498}
499
14516c3a
TM		 500static int nfs4_sequence_done(struct rpc_task *task,
501 struct nfs4_sequence_res *res)
df896455 502{
14516c3a
TM		 503 if (res->sr_session == NULL)
504 return 1;
505 return nfs41_sequence_done(task, res);
df896455
TM		 506}
507
510b8175
BH		 508/*
509 * nfs4_find_slot - efficiently look for a free slot
510 *
511 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
512 * If found, we mark the slot as used, update the highest_used_slotid,
513 * and respectively set up the sequence operation args.
45d43c29 514 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 515 *
516 * Note: must be called with under the slot_tbl_lock.
510b8175 517 */
45d43c29 518static u32
40ead580 519nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 520{
45d43c29
TM		 521 u32 slotid;
522 u32 ret_id = NFS4_NO_SLOT;
510b8175 523
45d43c29 524 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 525 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
526 tbl->max_slots);
527 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
528 if (slotid >= tbl->max_slots)
529 goto out;
530 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 531 if (slotid > tbl->highest_used_slotid ||
532 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 533 tbl->highest_used_slotid = slotid;
534 ret_id = slotid;
535out:
536 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
537 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 538 return ret_id;
539}
540
9d12b216
TM		 541static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
543{
544 args->sa_session = NULL;
545 args->sa_cache_this = 0;
546 if (cache_reply)
547 args->sa_cache_this = 1;
548 res->sr_session = NULL;
549 res->sr_slot = NULL;
550}
551
dc70d7b3 552int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 553 struct nfs4_sequence_args *args,
554 struct nfs4_sequence_res *res,
ce5039c1
AA		 555 struct rpc_task *task)
556{
fbcd4abc
AA		 557 struct nfs4_slot *slot;
558 struct nfs4_slot_table *tbl;
45d43c29 559 u32 slotid;
fbcd4abc
AA		 560
561 dprintk("--> %s\n", __func__);
ce5039c1 562 /* slot already allocated? */
dfb4f309 563 if (res->sr_slot != NULL)
ce5039c1
AA		 564 return 0;
565
fbcd4abc
AA		 566 tbl = &session->fc_slot_table;
567
568 spin_lock(&tbl->slot_tbl_lock);
a2118c33 569 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 570 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 571 /* The state manager will wait until the slot table is empty */
05f0d236 572 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 573 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 574 dprintk("%s session is draining\n", __func__);
05f0d236 575 return -EAGAIN;
b069d94a
AA		 576 }
577
689cf5c1
AB		 578 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
579 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
580 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
581 spin_unlock(&tbl->slot_tbl_lock);
582 dprintk("%s enforce FIFO order\n", __func__);
583 return -EAGAIN;
584 }
585
40ead580 586 slotid = nfs4_find_slot(tbl);
45d43c29 587 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 588 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
589 spin_unlock(&tbl->slot_tbl_lock);
590 dprintk("<-- %s: no free slots\n", __func__);
591 return -EAGAIN;
592 }
593 spin_unlock(&tbl->slot_tbl_lock);
594
689cf5c1 595 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 596 slot = tbl->slots + slotid;
99fe60d0 597 args->sa_session = session;
fbcd4abc 598 args->sa_slotid = slotid;
fbcd4abc
AA		 599
600 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
601
99fe60d0 602 res->sr_session = session;
dfb4f309 603 res->sr_slot = slot;
fbcd4abc 604 res->sr_renewal_time = jiffies;
2a6e26cd 605 res->sr_status_flags = 0;
fbcd4abc
AA		 606 /*
607 * sr_status is only set in decode_sequence, and so will remain
608 * set to 1 if an rpc level failure occurs.
609 */
610 res->sr_status = 1;
ce5039c1
AA		 611 return 0;
612}
dc70d7b3 613EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 614
035168ab 615int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
ce5039c1
AA		 618 struct rpc_task *task)
619{
035168ab 620 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 621 int ret = 0;
622
9d12b216 623 if (session == NULL)
035168ab 624 goto out;
035168ab 625
12364a4f 626 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 627 __func__, session->clp, session, res->sr_slot ?
628 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 629
9d12b216 630 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 631out:
632 dprintk("<-- %s status=%d\n", __func__, ret);
633 return ret;
634}
635
636struct nfs41_call_sync_data {
035168ab 637 const struct nfs_server *seq_server;
ce5039c1
AA		 638 struct nfs4_sequence_args *seq_args;
639 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 640};
641
642static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
643{
644 struct nfs41_call_sync_data *data = calldata;
645
035168ab
TM		 646 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
647
648 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 649 data->seq_res, task))
ce5039c1
AA		 650 return;
651 rpc_call_start(task);
652}
653
b257957e
AB		 654static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
655{
656 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
657 nfs41_call_sync_prepare(task, calldata);
658}
659
69ab40c4
AA		 660static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661{
662 struct nfs41_call_sync_data *data = calldata;
663
14516c3a 664 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 665}
666
ce5039c1
AA		 667struct rpc_call_ops nfs41_call_sync_ops = {
668 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 669 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 670};
671
b257957e
AB		 672struct rpc_call_ops nfs41_call_priv_sync_ops = {
673 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
674 .rpc_call_done = nfs41_call_sync_done,
675};
676
7c513058
BS		 677static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
678 struct nfs_server *server,
ce5039c1
AA		 679 struct rpc_message *msg,
680 struct nfs4_sequence_args *args,
681 struct nfs4_sequence_res *res,
b257957e 682 int privileged)
ce5039c1
AA		 683{
684 int ret;
685 struct rpc_task *task;
686 struct nfs41_call_sync_data data = {
035168ab 687 .seq_server = server,
ce5039c1
AA		 688 .seq_args = args,
689 .seq_res = res,
ce5039c1
AA		 690 };
691 struct rpc_task_setup task_setup = {
7c513058 692 .rpc_client = clnt,
ce5039c1
AA		 693 .rpc_message = msg,
694 .callback_ops = &nfs41_call_sync_ops,
695 .callback_data = &data
696 };
697
b257957e
AB		 698 if (privileged)
699 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 700 task = rpc_run_task(&task_setup);
701 if (IS_ERR(task))
702 ret = PTR_ERR(task);
703 else {
704 ret = task->tk_status;
705 rpc_put_task(task);
706 }
707 return ret;
708}
709
7c513058
BS		 710int _nfs4_call_sync_session(struct rpc_clnt *clnt,
711 struct nfs_server *server,
cccef3b9
AA		 712 struct rpc_message *msg,
713 struct nfs4_sequence_args *args,
714 struct nfs4_sequence_res *res,
715 int cache_reply)
716{
9d12b216
TM		 717 nfs41_init_sequence(args, res, cache_reply);
718 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 719}
720
df896455 721#else
9d12b216
TM		 722static inline
723void nfs41_init_sequence(struct nfs4_sequence_args *args,
724 struct nfs4_sequence_res *res, int cache_reply)
725{
726}
727
14516c3a
TM		 728static int nfs4_sequence_done(struct rpc_task *task,
729 struct nfs4_sequence_res *res)
df896455 730{
14516c3a 731 return 1;
df896455 732}
cccef3b9
AA		 733#endif /* CONFIG_NFS_V4_1 */
734
7c513058
BS		 735int _nfs4_call_sync(struct rpc_clnt *clnt,
736 struct nfs_server *server,
cccef3b9
AA		 737 struct rpc_message *msg,
738 struct nfs4_sequence_args *args,
739 struct nfs4_sequence_res *res,
740 int cache_reply)
741{
9d12b216 742 nfs41_init_sequence(args, res, cache_reply);
7c513058 743 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 744}
745
e73b83f2 746static inline
7c513058
BS		 747int nfs4_call_sync(struct rpc_clnt *clnt,
748 struct nfs_server *server,
e73b83f2
BS		 749 struct rpc_message *msg,
750 struct nfs4_sequence_args *args,
751 struct nfs4_sequence_res *res,
752 int cache_reply)
753{
7c513058
BS		 754 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
755 args, res, cache_reply);
e73b83f2 756}
cccef3b9 757
38478b24 758static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 759{
38478b24 760 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 761
38478b24 762 spin_lock(&dir->i_lock);
40d24704 763 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
a9a4a87a 764 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 765 nfs_force_lookup_revalidate(dir);
a9a4a87a 766 dir->i_version = cinfo->after;
38478b24 767 spin_unlock(&dir->i_lock);
1da177e4
LT		 768}
769
e56e0b78 770struct nfs4_opendata {
c6d00e63 771 struct kref kref;
e56e0b78
TM		 772 struct nfs_openargs o_arg;
773 struct nfs_openres o_res;
cdd4e68b
TM		 774 struct nfs_open_confirmargs c_arg;
775 struct nfs_open_confirmres c_res;
6926afd1
TM		 776 struct nfs4_string owner_name;
777 struct nfs4_string group_name;
e56e0b78
TM		 778 struct nfs_fattr f_attr;
779 struct nfs_fattr dir_attr;
e56e0b78 780 struct dentry *dir;
82a2c1b7 781 struct dentry *dentry;
e56e0b78 782 struct nfs4_state_owner *owner;
aac00a8d 783 struct nfs4_state *state;
e56e0b78 784 struct iattr attrs;
26e976a8 785 unsigned long timestamp;
3e309914 786 unsigned int rpc_done : 1;
24ac23ab
TM		 787 int rpc_status;
788 int cancelled;
e56e0b78
TM		 789};
790
2ced46c2
TM		 791
792static void nfs4_init_opendata_res(struct nfs4_opendata *p)
793{
794 p->o_res.f_attr = &p->f_attr;
795 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 796 p->o_res.seqid = p->o_arg.seqid;
797 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 798 p->o_res.server = p->o_arg.server;
799 nfs_fattr_init(&p->f_attr);
800 nfs_fattr_init(&p->dir_attr);
6926afd1 801 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 802}
803
82a2c1b7 804static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 805 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 806 const struct iattr *attrs,
807 gfp_t gfp_mask)
e56e0b78 808{
82a2c1b7 809 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 810 struct inode *dir = parent->d_inode;
811 struct nfs_server *server = NFS_SERVER(dir);
812 struct nfs4_opendata *p;
813
8535b2be 814 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 815 if (p == NULL)
816 goto err;
8535b2be 817 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 818 if (p->o_arg.seqid == NULL)
819 goto err_free;
82a2c1b7
AV		 820 nfs_sb_active(dentry->d_sb);
821 p->dentry = dget(dentry);
e56e0b78
TM		 822 p->dir = parent;
823 p->owner = sp;
824 atomic_inc(&sp->so_count);
825 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 826 p->o_arg.open_flags = flags;
827 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 828 p->o_arg.clientid = server->nfs_client->cl_clientid;
48c22eb2 829 p->o_arg.id = sp->so_seqid.owner_id;
82a2c1b7 830 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 831 p->o_arg.server = server;
832 p->o_arg.bitmask = server->attr_bitmask;
6926afd1 833 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
e56e0b78 834 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 835 if (attrs != NULL && attrs->ia_valid != 0) {
d77d76ff
TM		 836 u32 *s;
837
e56e0b78
TM		 838 p->o_arg.u.attrs = &p->attrs;
839 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 840 s = (u32 *) p->o_arg.u.verifier.data;
841 s[0] = jiffies;
842 s[1] = current->pid;
e56e0b78 843 }
cdd4e68b
TM		 844 p->c_arg.fh = &p->o_res.fh;
845 p->c_arg.stateid = &p->o_res.stateid;
846 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 847 nfs4_init_opendata_res(p);
c6d00e63 848 kref_init(&p->kref);
e56e0b78
TM		 849 return p;
850err_free:
851 kfree(p);
852err:
853 dput(parent);
854 return NULL;
855}
856
c6d00e63 857static void nfs4_opendata_free(struct kref *kref)
e56e0b78 858{
c6d00e63
TM		 859 struct nfs4_opendata *p = container_of(kref,
860 struct nfs4_opendata, kref);
82a2c1b7 861 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 862
863 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 864 if (p->state != NULL)
865 nfs4_put_open_state(p->state);
c6d00e63
TM		 866 nfs4_put_state_owner(p->owner);
867 dput(p->dir);
82a2c1b7
AV		 868 dput(p->dentry);
869 nfs_sb_deactive(sb);
6926afd1 870 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 871 kfree(p);
872}
873
874static void nfs4_opendata_put(struct nfs4_opendata *p)
875{
876 if (p != NULL)
877 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 878}
879
06f814a3
TM		 880static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
881{
06f814a3
TM		 882 int ret;
883
06f814a3 884 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 885 return ret;
886}
887
dc0b027d 888static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 889{
890 int ret = 0;
dc0b027d 891
536e43d1 892 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 893 goto out;
894 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 895 case FMODE_READ:
88069f77
TM		 896 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
897 && state->n_rdonly != 0;
6ee41268
TM		 898 break;
899 case FMODE_WRITE:
88069f77
TM		 900 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
901 && state->n_wronly != 0;
6ee41268
TM		 902 break;
903 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 904 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
905 && state->n_rdwr != 0;
6ee41268 906 }
dc0b027d 907out:
6ee41268
TM		 908 return ret;
909}
910
dc0b027d 911static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 912{
652f89f6
TM		 913 if (delegation == NULL)
914 return 0;
dc0b027d 915 if ((delegation->type & fmode) != fmode)
aac00a8d 916 return 0;
15c831bf 917 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 918 return 0;
b7391f44 919 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 920 return 1;
921}
922
dc0b027d 923static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 924{
dc0b027d 925 switch (fmode) {
e7616923
TM		 926 case FMODE_WRITE:
927 state->n_wronly++;
928 break;
929 case FMODE_READ:
930 state->n_rdonly++;
931 break;
932 case FMODE_READ|FMODE_WRITE:
933 state->n_rdwr++;
934 }
dc0b027d 935 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 936}
937
dc0b027d 938static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 939{
940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
941 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
942 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 943 switch (fmode) {
003707c7
TM		 944 case FMODE_READ:
945 set_bit(NFS_O_RDONLY_STATE, &state->flags);
946 break;
947 case FMODE_WRITE:
948 set_bit(NFS_O_WRONLY_STATE, &state->flags);
949 break;
950 case FMODE_READ|FMODE_WRITE:
951 set_bit(NFS_O_RDWR_STATE, &state->flags);
952 }
e7616923
TM		 953}
954
dc0b027d 955static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 956{
8bda4e4c 957 write_seqlock(&state->seqlock);
dc0b027d 958 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 959 write_sequnlock(&state->seqlock);
003707c7
TM		 960}
961
dc0b027d 962static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 963{
8bda4e4c
TM		 964 /*
965 * Protect the call to nfs4_state_set_mode_locked and
966 * serialise the stateid update
967 */
968 write_seqlock(&state->seqlock);
003707c7
TM		 969 if (deleg_stateid != NULL) {
970 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
971 set_bit(NFS_DELEGATED_STATE, &state->flags);
972 }
973 if (open_stateid != NULL)
dc0b027d 974 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 975 write_sequnlock(&state->seqlock);
976 spin_lock(&state->owner->so_lock);
dc0b027d 977 update_open_stateflags(state, fmode);
ec073428 978 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 979}
980
dc0b027d 981static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 982{
983 struct nfs_inode *nfsi = NFS_I(state->inode);
984 struct nfs_delegation *deleg_cur;
985 int ret = 0;
986
dc0b027d 987 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 988
989 rcu_read_lock();
990 deleg_cur = rcu_dereference(nfsi->delegation);
991 if (deleg_cur == NULL)
992 goto no_delegation;
993
994 spin_lock(&deleg_cur->lock);
995 if (nfsi->delegation != deleg_cur ||
dc0b027d 996 (deleg_cur->type & fmode) != fmode)
34310430
TM		 997 goto no_delegation_unlock;
998
999 if (delegation == NULL)
1000 delegation = &deleg_cur->stateid;
1001 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1002 goto no_delegation_unlock;
1003
b7391f44 1004 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1005 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1006 ret = 1;
1007no_delegation_unlock:
1008 spin_unlock(&deleg_cur->lock);
1009no_delegation:
1010 rcu_read_unlock();
1011
1012 if (!ret && open_stateid != NULL) {
dc0b027d 1013 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1014 ret = 1;
1015 }
1016
1017 return ret;
1018}
1019
1020
dc0b027d 1021static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1022{
1023 struct nfs_delegation *delegation;
1024
1025 rcu_read_lock();
1026 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1027 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1028 rcu_read_unlock();
1029 return;
1030 }
1031 rcu_read_unlock();
1032 nfs_inode_return_delegation(inode);
1033}
1034
6ee41268 1035static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1036{
1037 struct nfs4_state *state = opendata->state;
1038 struct nfs_inode *nfsi = NFS_I(state->inode);
1039 struct nfs_delegation *delegation;
536e43d1 1040 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1041 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1042 nfs4_stateid stateid;
1043 int ret = -EAGAIN;
1044
aac00a8d 1045 for (;;) {
dc0b027d 1046 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1047 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1048 if (can_open_cached(state, fmode, open_mode)) {
1049 update_open_stateflags(state, fmode);
6ee41268 1050 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1051 goto out_return_state;
1052 }
1053 spin_unlock(&state->owner->so_lock);
1054 }
34310430
TM		 1055 rcu_read_lock();
1056 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1057 if (!can_open_delegated(delegation, fmode)) {
34310430 1058 rcu_read_unlock();
aac00a8d 1059 break;
34310430 1060 }
aac00a8d
TM		 1061 /* Save the delegation */
1062 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1063 rcu_read_unlock();
af22f94a 1064 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1065 if (ret != 0)
1066 goto out;
1067 ret = -EAGAIN;
34310430
TM		 1068
1069 /* Try to update the stateid using the delegation */
dc0b027d 1070 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1071 goto out_return_state;
aac00a8d 1072 }
aac00a8d
TM		 1073out:
1074 return ERR_PTR(ret);
1075out_return_state:
1076 atomic_inc(&state->count);
1077 return state;
1078}
1079
24ac23ab
TM		 1080static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1081{
1082 struct inode *inode;
1083 struct nfs4_state *state = NULL;
003707c7 1084 struct nfs_delegation *delegation;
1b370bc2 1085 int ret;
24ac23ab 1086
aac00a8d 1087 if (!data->rpc_done) {
6ee41268 1088 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1089 goto out;
1090 }
1091
1b370bc2 1092 ret = -EAGAIN;
24ac23ab 1093 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1094 goto err;
24ac23ab 1095 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1096 ret = PTR_ERR(inode);
03f28e3a 1097 if (IS_ERR(inode))
1b370bc2
TM		 1098 goto err;
1099 ret = -ENOMEM;
24ac23ab
TM		 1100 state = nfs4_get_open_state(inode, data->owner);
1101 if (state == NULL)
1b370bc2 1102 goto err_put_inode;
549d6ed5 1103 if (data->o_res.delegation_type != 0) {
4e0038b6 1104 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1105 int delegation_flags = 0;
1106
003707c7
TM		 1107 rcu_read_lock();
1108 delegation = rcu_dereference(NFS_I(inode)->delegation);
1109 if (delegation)
1110 delegation_flags = delegation->flags;
1111 rcu_read_unlock();
652f89f6
TM		 1112 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1113 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1114 "returning a delegation for "
1115 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1116 clp->cl_hostname);
652f89f6 1117 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1118 nfs_inode_set_delegation(state->inode,
1119 data->owner->so_cred,
1120 &data->o_res);
1121 else
1122 nfs_inode_reclaim_delegation(state->inode,
1123 data->owner->so_cred,
1124 &data->o_res);
1125 }
34310430
TM		 1126
1127 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1128 data->o_arg.fmode);
24ac23ab 1129 iput(inode);
aac00a8d 1130out:
24ac23ab 1131 return state;
1b370bc2
TM		 1132err_put_inode:
1133 iput(inode);
1134err:
1135 return ERR_PTR(ret);
24ac23ab
TM		 1136}
1137
864472e9
TM		 1138static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1139{
1140 struct nfs_inode *nfsi = NFS_I(state->inode);
1141 struct nfs_open_context *ctx;
1142
1143 spin_lock(&state->inode->i_lock);
1144 list_for_each_entry(ctx, &nfsi->open_files, list) {
1145 if (ctx->state != state)
1146 continue;
1147 get_nfs_open_context(ctx);
1148 spin_unlock(&state->inode->i_lock);
1149 return ctx;
1150 }
1151 spin_unlock(&state->inode->i_lock);
1152 return ERR_PTR(-ENOENT);
1153}
1154
6f220ed5
TM		 1155static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1156{
1157 struct nfs4_opendata *opendata;
1158
3d4ff43d 1159 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1160 if (opendata == NULL)
1161 return ERR_PTR(-ENOMEM);
1162 opendata->state = state;
1163 atomic_inc(&state->count);
1164 return opendata;
1165}
1166
dc0b027d 1167static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1168{
2ced46c2 1169 struct nfs4_state *newstate;
864472e9
TM		 1170 int ret;
1171
dc0b027d
TM		 1172 opendata->o_arg.open_flags = 0;
1173 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1174 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1175 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1176 nfs4_init_opendata_res(opendata);
b257957e 1177 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1178 if (ret != 0)
1179 return ret;
2ced46c2 1180 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1181 if (IS_ERR(newstate))
1182 return PTR_ERR(newstate);
643168c2 1183 nfs4_close_state(newstate, fmode);
2ced46c2 1184 *res = newstate;
864472e9
TM		 1185 return 0;
1186}
1187
1188static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1189{
864472e9 1190 struct nfs4_state *newstate;
864472e9
TM		 1191 int ret;
1192
1193 /* memory barrier prior to reading state->n_* */
2ced46c2 1194 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1195 smp_rmb();
1196 if (state->n_rdwr != 0) {
b0ed9dbc 1197 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1198 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1199 if (ret != 0)
1200 return ret;
2ced46c2
TM		 1201 if (newstate != state)
1202 return -ESTALE;
864472e9
TM		 1203 }
1204 if (state->n_wronly != 0) {
b0ed9dbc 1205 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1206 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1207 if (ret != 0)
1208 return ret;
2ced46c2
TM		 1209 if (newstate != state)
1210 return -ESTALE;
864472e9
TM		 1211 }
1212 if (state->n_rdonly != 0) {
b0ed9dbc 1213 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1214 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1215 if (ret != 0)
1216 return ret;
2ced46c2
TM		 1217 if (newstate != state)
1218 return -ESTALE;
864472e9 1219 }
1ac7e2fd
TM		 1220 /*
1221 * We may have performed cached opens for all three recoveries.
1222 * Check if we need to update the current stateid.
1223 */
1224 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1225 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1226 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1228 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1229 write_sequnlock(&state->seqlock);
1ac7e2fd 1230 }
864472e9
TM		 1231 return 0;
1232}
1233
1da177e4
LT		 1234/*
1235 * OPEN_RECLAIM:
1236 * reclaim state on the server after a reboot.
1da177e4 1237 */
539cd03a 1238static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1239{
1ac7e2fd 1240 struct nfs_delegation *delegation;
864472e9 1241 struct nfs4_opendata *opendata;
dc0b027d 1242 fmode_t delegation_type = 0;
1da177e4
LT		 1243 int status;
1244
6f220ed5
TM		 1245 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1246 if (IS_ERR(opendata))
1247 return PTR_ERR(opendata);
864472e9
TM		 1248 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1249 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1250 rcu_read_lock();
1251 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1252 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1253 delegation_type = delegation->type;
1ac7e2fd 1254 rcu_read_unlock();
864472e9
TM		 1255 opendata->o_arg.u.delegation_type = delegation_type;
1256 status = nfs4_open_recover(opendata, state);
c6d00e63 1257 nfs4_opendata_put(opendata);
1da177e4
LT		 1258 return status;
1259}
1260
539cd03a 1261static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1262{
1263 struct nfs_server *server = NFS_SERVER(state->inode);
1264 struct nfs4_exception exception = { };
1265 int err;
1266 do {
539cd03a 1267 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1268 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1269 break;
1270 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1271 } while (exception.retry);
1272 return err;
1273}
1274
864472e9
TM		 1275static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1276{
1277 struct nfs_open_context *ctx;
1278 int ret;
1279
1280 ctx = nfs4_state_find_open_context(state);
1281 if (IS_ERR(ctx))
1282 return PTR_ERR(ctx);
539cd03a 1283 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1284 put_nfs_open_context(ctx);
1285 return ret;
1286}
1287
13437e12 1288static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1289{
e56e0b78 1290 struct nfs4_opendata *opendata;
864472e9 1291 int ret;
1da177e4 1292
6f220ed5
TM		 1293 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1294 if (IS_ERR(opendata))
1295 return PTR_ERR(opendata);
e56e0b78 1296 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1297 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1298 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1299 ret = nfs4_open_recover(opendata, state);
c6d00e63 1300 nfs4_opendata_put(opendata);
864472e9 1301 return ret;
1da177e4
LT		 1302}
1303
13437e12 1304int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1305{
1306 struct nfs4_exception exception = { };
539cd03a 1307 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1308 int err;
1309 do {
13437e12 1310 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1311 switch (err) {
1312 case 0:
965b5d67
TM		 1313 case -ENOENT:
1314 case -ESTALE:
1315 goto out;
bcfa49f6
RL		 1316 case -NFS4ERR_BADSESSION:
1317 case -NFS4ERR_BADSLOT:
1318 case -NFS4ERR_BAD_HIGH_SLOT:
1319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1320 case -NFS4ERR_DEADSESSION:
0400a6b0 1321 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1322 goto out;
1da177e4
LT		 1323 case -NFS4ERR_STALE_CLIENTID:
1324 case -NFS4ERR_STALE_STATEID:
1325 case -NFS4ERR_EXPIRED:
1326 /* Don't recall a delegation if it was lost */
0400a6b0 1327 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1328 goto out;
1329 case -ERESTARTSYS:
1330 /*
1331 * The show must go on: exit, but mark the
1332 * stateid as needing recovery.
1333 */
1334 case -NFS4ERR_ADMIN_REVOKED:
1335 case -NFS4ERR_BAD_STATEID:
0400a6b0 1336 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1337 case -EKEYEXPIRED:
1338 /*
1339 * User RPCSEC_GSS context has expired.
1340 * We cannot recover this stateid now, so
1341 * skip it and allow recovery thread to
1342 * proceed.
1343 */
965b5d67
TM		 1344 case -ENOMEM:
1345 err = 0;
1346 goto out;
1da177e4
LT		 1347 }
1348 err = nfs4_handle_exception(server, err, &exception);
1349 } while (exception.retry);
965b5d67 1350out:
1da177e4
LT		 1351 return err;
1352}
1353
cdd4e68b
TM		 1354static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1355{
1356 struct nfs4_opendata *data = calldata;
1357
1358 data->rpc_status = task->tk_status;
26e976a8 1359 if (data->rpc_status == 0) {
cdd4e68b
TM		 1360 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1361 sizeof(data->o_res.stateid.data));
bb22629e 1362 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1363 renew_lease(data->o_res.server, data->timestamp);
3e309914 1364 data->rpc_done = 1;
26e976a8 1365 }
cdd4e68b
TM		 1366}
1367
1368static void nfs4_open_confirm_release(void *calldata)
1369{
1370 struct nfs4_opendata *data = calldata;
1371 struct nfs4_state *state = NULL;
1372
1373 /* If this request hasn't been cancelled, do nothing */
1374 if (data->cancelled == 0)
1375 goto out_free;
1376 /* In case of error, no cleanup! */
3e309914 1377 if (!data->rpc_done)
cdd4e68b 1378 goto out_free;
cdd4e68b 1379 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1380 if (!IS_ERR(state))
643168c2 1381 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1382out_free:
c6d00e63 1383 nfs4_opendata_put(data);
cdd4e68b
TM		 1384}
1385
1386static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1387 .rpc_call_done = nfs4_open_confirm_done,
1388 .rpc_release = nfs4_open_confirm_release,
1389};
1390
1391/*
1392 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1393 */
1394static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1395{
1396 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1397 struct rpc_task *task;
5138fde0
TM		 1398 struct rpc_message msg = {
1399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1400 .rpc_argp = &data->c_arg,
1401 .rpc_resp = &data->c_res,
1402 .rpc_cred = data->owner->so_cred,
1403 };
c970aa85
TM		 1404 struct rpc_task_setup task_setup_data = {
1405 .rpc_client = server->client,
5138fde0 1406 .rpc_message = &msg,
c970aa85
TM		 1407 .callback_ops = &nfs4_open_confirm_ops,
1408 .callback_data = data,
101070ca 1409 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1410 .flags = RPC_TASK_ASYNC,
1411 };
1da177e4
LT		 1412 int status;
1413
c6d00e63 1414 kref_get(&data->kref);
3e309914
TM		 1415 data->rpc_done = 0;
1416 data->rpc_status = 0;
5138fde0 1417 data->timestamp = jiffies;
c970aa85 1418 task = rpc_run_task(&task_setup_data);
7a1218a2 1419 if (IS_ERR(task))
cdd4e68b 1420 return PTR_ERR(task);
cdd4e68b
TM		 1421 status = nfs4_wait_for_completion_rpc_task(task);
1422 if (status != 0) {
1423 data->cancelled = 1;
1424 smp_wmb();
1425 } else
1426 status = data->rpc_status;
e6b3c4db 1427 rpc_put_task(task);
1da177e4
LT		 1428 return status;
1429}
1430
24ac23ab 1431static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1432{
24ac23ab
TM		 1433 struct nfs4_opendata *data = calldata;
1434 struct nfs4_state_owner *sp = data->owner;
5138fde0 1435
24ac23ab
TM		 1436 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1437 return;
aac00a8d
TM		 1438 /*
1439 * Check if we still need to send an OPEN call, or if we can use
1440 * a delegation instead.
1441 */
1442 if (data->state != NULL) {
1443 struct nfs_delegation *delegation;
1444
dc0b027d 1445 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1446 goto out_no_action;
aac00a8d
TM		 1447 rcu_read_lock();
1448 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1449 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1450 can_open_delegated(delegation, data->o_arg.fmode))
1451 goto unlock_no_action;
aac00a8d
TM		 1452 rcu_read_unlock();
1453 }
24ac23ab 1454 /* Update sequence id. */
48c22eb2 1455 data->o_arg.id = sp->so_seqid.owner_id;
1f0e890d 1456 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1457 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1458 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1459 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1460 }
26e976a8 1461 data->timestamp = jiffies;
035168ab 1462 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1463 &data->o_arg.seq_args,
9d12b216 1464 &data->o_res.seq_res, task))
d898528c 1465 return;
5138fde0 1466 rpc_call_start(task);
6ee41268 1467 return;
652f89f6
TM		 1468unlock_no_action:
1469 rcu_read_unlock();
6ee41268
TM		 1470out_no_action:
1471 task->tk_action = NULL;
1472
24ac23ab 1473}
1da177e4 1474
b257957e
AB		 1475static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1476{
1477 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1478 nfs4_open_prepare(task, calldata);
1479}
1480
24ac23ab
TM		 1481static void nfs4_open_done(struct rpc_task *task, void *calldata)
1482{
1483 struct nfs4_opendata *data = calldata;
1da177e4 1484
24ac23ab 1485 data->rpc_status = task->tk_status;
d898528c 1486
14516c3a
TM		 1487 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1488 return;
d898528c 1489
24ac23ab
TM		 1490 if (task->tk_status == 0) {
1491 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1492 case S_IFREG:
1493 break;
1494 case S_IFLNK:
24ac23ab 1495 data->rpc_status = -ELOOP;
6f926b5b
TM		 1496 break;
1497 case S_IFDIR:
24ac23ab 1498 data->rpc_status = -EISDIR;
6f926b5b
TM		 1499 break;
1500 default:
24ac23ab 1501 data->rpc_status = -ENOTDIR;
6f926b5b 1502 }
26e976a8 1503 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1504 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1505 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1506 }
3e309914 1507 data->rpc_done = 1;
24ac23ab 1508}
6f926b5b 1509
24ac23ab
TM		 1510static void nfs4_open_release(void *calldata)
1511{
1512 struct nfs4_opendata *data = calldata;
1513 struct nfs4_state *state = NULL;
1514
1515 /* If this request hasn't been cancelled, do nothing */
1516 if (data->cancelled == 0)
1517 goto out_free;
1518 /* In case of error, no cleanup! */
3e309914 1519 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1520 goto out_free;
1521 /* In case we need an open_confirm, no cleanup! */
1522 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1523 goto out_free;
24ac23ab 1524 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1525 if (!IS_ERR(state))
643168c2 1526 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1527out_free:
c6d00e63 1528 nfs4_opendata_put(data);
24ac23ab
TM		 1529}
1530
1531static const struct rpc_call_ops nfs4_open_ops = {
1532 .rpc_call_prepare = nfs4_open_prepare,
1533 .rpc_call_done = nfs4_open_done,
1534 .rpc_release = nfs4_open_release,
1535};
1536
b257957e
AB		 1537static const struct rpc_call_ops nfs4_recover_open_ops = {
1538 .rpc_call_prepare = nfs4_recover_open_prepare,
1539 .rpc_call_done = nfs4_open_done,
1540 .rpc_release = nfs4_open_release,
1541};
1542
1543static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1544{
1545 struct inode *dir = data->dir->d_inode;
1546 struct nfs_server *server = NFS_SERVER(dir);
1547 struct nfs_openargs *o_arg = &data->o_arg;
1548 struct nfs_openres *o_res = &data->o_res;
1549 struct rpc_task *task;
5138fde0
TM		 1550 struct rpc_message msg = {
1551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1552 .rpc_argp = o_arg,
1553 .rpc_resp = o_res,
1554 .rpc_cred = data->owner->so_cred,
1555 };
c970aa85
TM		 1556 struct rpc_task_setup task_setup_data = {
1557 .rpc_client = server->client,
5138fde0 1558 .rpc_message = &msg,
c970aa85
TM		 1559 .callback_ops = &nfs4_open_ops,
1560 .callback_data = data,
101070ca 1561 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1562 .flags = RPC_TASK_ASYNC,
1563 };
24ac23ab
TM		 1564 int status;
1565
9d12b216 1566 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1567 kref_get(&data->kref);
3e309914
TM		 1568 data->rpc_done = 0;
1569 data->rpc_status = 0;
2ced46c2 1570 data->cancelled = 0;
b257957e
AB		 1571 if (isrecover)
1572 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1573 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1574 if (IS_ERR(task))
1575 return PTR_ERR(task);
1576 status = nfs4_wait_for_completion_rpc_task(task);
1577 if (status != 0) {
1578 data->cancelled = 1;
1579 smp_wmb();
1580 } else
1581 status = data->rpc_status;
1582 rpc_put_task(task);
1583
1584 return status;
1585}
1586
1587static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1588{
1589 struct inode *dir = data->dir->d_inode;
1590 struct nfs_openres *o_res = &data->o_res;
1591 int status;
1592
1593 status = nfs4_run_open_task(data, 1);
1594 if (status != 0 || !data->rpc_done)
1595 return status;
1596
6926afd1
TM		 1597 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1598
b257957e
AB		 1599 nfs_refresh_inode(dir, o_res->dir_attr);
1600
1601 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1602 status = _nfs4_proc_open_confirm(data);
1603 if (status != 0)
1604 return status;
1605 }
1606
1607 return status;
1608}
1609
1610/*
1611 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1612 */
1613static int _nfs4_proc_open(struct nfs4_opendata *data)
1614{
1615 struct inode *dir = data->dir->d_inode;
1616 struct nfs_server *server = NFS_SERVER(dir);
1617 struct nfs_openargs *o_arg = &data->o_arg;
1618 struct nfs_openres *o_res = &data->o_res;
1619 int status;
1620
1621 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1622 if (!data->rpc_done)
1623 return status;
1624 if (status != 0) {
1625 if (status == -NFS4ERR_BADNAME &&
1626 !(o_arg->open_flags & O_CREAT))
1627 return -ENOENT;
24ac23ab 1628 return status;
08ef7bd3 1629 }
24ac23ab 1630
6926afd1
TM		 1631 nfs_fattr_map_and_free_names(server, &data->f_attr);
1632
56ae19f3
TM		 1633 if (o_arg->open_flags & O_CREAT) {
1634 update_changeattr(dir, &o_res->cinfo);
1635 nfs_post_op_update_inode(dir, o_res->dir_attr);
1636 } else
1637 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1638 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1639 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1640 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1641 status = _nfs4_proc_open_confirm(data);
1da177e4 1642 if (status != 0)
24ac23ab 1643 return status;
1da177e4
LT		 1644 }
1645 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1646 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1647 return 0;
1da177e4
LT		 1648}
1649
d83217c1 1650static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1651{
a78cb57a 1652 unsigned int loop;
6b30954e 1653 int ret;
58d9714a 1654
a78cb57a 1655 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1656 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1657 if (ret != 0)
a78cb57a 1658 break;
e598d843
TM		 1659 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1660 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1661 break;
0400a6b0 1662 nfs4_schedule_state_manager(clp);
a78cb57a 1663 ret = -EIO;
6b30954e 1664 }
a78cb57a 1665 return ret;
58d9714a
TM		 1666}
1667
d83217c1
AA		 1668static int nfs4_recover_expired_lease(struct nfs_server *server)
1669{
1670 return nfs4_client_recover_expired_lease(server->nfs_client);
1671}
1672
1da177e4
LT		 1673/*
1674 * OPEN_EXPIRED:
1675 * reclaim state on the server after a network partition.
1676 * Assumes caller holds the appropriate lock
1677 */
539cd03a 1678static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1679{
e56e0b78 1680 struct nfs4_opendata *opendata;
864472e9 1681 int ret;
1da177e4 1682
6f220ed5
TM		 1683 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1684 if (IS_ERR(opendata))
1685 return PTR_ERR(opendata);
864472e9 1686 ret = nfs4_open_recover(opendata, state);
35d05778 1687 if (ret == -ESTALE)
3d4ff43d 1688 d_drop(ctx->dentry);
c6d00e63 1689 nfs4_opendata_put(opendata);
864472e9 1690 return ret;
1da177e4
LT		 1691}
1692
a9ed2e25 1693static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1694{
539cd03a 1695 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1696 struct nfs4_exception exception = { };
1697 int err;
1698
1699 do {
539cd03a 1700 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1701 switch (err) {
1702 default:
1703 goto out;
1704 case -NFS4ERR_GRACE:
1705 case -NFS4ERR_DELAY:
1706 nfs4_handle_exception(server, err, &exception);
1707 err = 0;
1708 }
202b50dc 1709 } while (exception.retry);
a9ed2e25 1710out:
202b50dc
TM		 1711 return err;
1712}
1713
1da177e4
LT		 1714static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1715{
1da177e4 1716 struct nfs_open_context *ctx;
864472e9 1717 int ret;
1da177e4 1718
864472e9
TM		 1719 ctx = nfs4_state_find_open_context(state);
1720 if (IS_ERR(ctx))
1721 return PTR_ERR(ctx);
539cd03a 1722 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1723 put_nfs_open_context(ctx);
1724 return ret;
1da177e4
LT		 1725}
1726
f062eb6c 1727#if defined(CONFIG_NFS_V4_1)
b01dd1d8 1728static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
f062eb6c 1729{
b01dd1d8 1730 int status = NFS_OK;
f062eb6c
BS		 1731 struct nfs_server *server = NFS_SERVER(state->inode);
1732
b01dd1d8
BS		 1733 if (state->flags & flags) {
1734 status = nfs41_test_stateid(server, stateid);
1735 if (status != NFS_OK) {
1736 nfs41_free_stateid(server, stateid);
1737 state->flags &= ~flags;
1738 }
1739 }
1740 return status;
1741}
1742
1743static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1744{
1745 int deleg_status, open_status;
1746 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1747 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1748
1749 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1750 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1751
1752 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1753 return NFS_OK;
f062eb6c
BS		 1754 return nfs4_open_expired(sp, state);
1755}
1756#endif
1757
aa53ed54
JL		 1758/*
1759 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1760 * fields corresponding to attributes that were used to store the verifier.
1761 * Make sure we clobber those fields in the later setattr call
1762 */
1763static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1764{
1765 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1766 !(sattr->ia_valid & ATTR_ATIME_SET))
1767 sattr->ia_valid |= ATTR_ATIME;
1768
1769 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1770 !(sattr->ia_valid & ATTR_MTIME_SET))
1771 sattr->ia_valid |= ATTR_MTIME;
1772}
1773
1da177e4 1774/*
24ac23ab 1775 * Returns a referenced nfs4_state
1da177e4 1776 */
82a2c1b7 1777static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1778{
1779 struct nfs4_state_owner *sp;
1780 struct nfs4_state *state = NULL;
1781 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1782 struct nfs4_opendata *opendata;
aac00a8d 1783 int status;
1da177e4
LT		 1784
1785 /* Protect against reboot recovery conflicts */
1da177e4 1786 status = -ENOMEM;
d1e284d5
TM		 1787 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1788 if (sp == NULL) {
1da177e4
LT		 1789 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1790 goto out_err;
1791 }
58d9714a
TM		 1792 status = nfs4_recover_expired_lease(server);
1793 if (status != 0)
b4454fe1 1794 goto err_put_state_owner;
82a2c1b7
AV		 1795 if (dentry->d_inode != NULL)
1796 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1797 status = -ENOMEM;
82a2c1b7 1798 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1799 if (opendata == NULL)
95d35cb4 1800 goto err_put_state_owner;
1da177e4 1801
82a2c1b7
AV		 1802 if (dentry->d_inode != NULL)
1803 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1804
24ac23ab 1805 status = _nfs4_proc_open(opendata);
1da177e4 1806 if (status != 0)
c6d00e63 1807 goto err_opendata_put;
1da177e4 1808
24ac23ab 1809 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1810 status = PTR_ERR(state);
1811 if (IS_ERR(state))
c6d00e63 1812 goto err_opendata_put;
0df5dd4a 1813 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1814 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1815
1816 if (opendata->o_arg.open_flags & O_EXCL) {
1817 nfs4_exclusive_attrset(opendata, sattr);
1818
1819 nfs_fattr_init(opendata->o_res.f_attr);
1820 status = nfs4_do_setattr(state->inode, cred,
1821 opendata->o_res.f_attr, sattr,
1822 state);
1823 if (status == 0)
1824 nfs_setattr_update_inode(state->inode, sattr);
1825 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1826 }
c6d00e63 1827 nfs4_opendata_put(opendata);
1da177e4 1828 nfs4_put_state_owner(sp);
1da177e4
LT		 1829 *res = state;
1830 return 0;
c6d00e63
TM		 1831err_opendata_put:
1832 nfs4_opendata_put(opendata);
e56e0b78
TM		 1833err_put_state_owner:
1834 nfs4_put_state_owner(sp);
1da177e4 1835out_err:
1da177e4
LT		 1836 *res = NULL;
1837 return status;
1838}
1839
1840
82a2c1b7 1841static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1842{
1843 struct nfs4_exception exception = { };
1844 struct nfs4_state *res;
1845 int status;
1846
1847 do {
82a2c1b7 1848 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1849 if (status == 0)
1850 break;
1851 /* NOTE: BAD_SEQID means the server and client disagree about the
1852 * book-keeping w.r.t. state-changing operations
1853 * (OPEN/CLOSE/LOCK/LOCKU...)
1854 * It is actually a sign of a bug on the client or on the server.
1855 *
1856 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1857 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1858 * have unhashed the old state_owner for us, and that we can
1859 * therefore safely retry using a new one. We should still warn
1860 * the user though...
1861 */
1862 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1863 printk(KERN_WARNING "NFS: v4 server %s "
1864 " returned a bad sequence-id error!\n",
1865 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1866 exception.retry = 1;
1867 continue;
1868 }
550f5747
TM		 1869 /*
1870 * BAD_STATEID on OPEN means that the server cancelled our
1871 * state before it received the OPEN_CONFIRM.
1872 * Recover by retrying the request as per the discussion
1873 * on Page 181 of RFC3530.
1874 */
1875 if (status == -NFS4ERR_BAD_STATEID) {
1876 exception.retry = 1;
1877 continue;
1878 }
aac00a8d
TM		 1879 if (status == -EAGAIN) {
1880 /* We must have found a delegation */
1881 exception.retry = 1;
1882 continue;
1883 }
1da177e4
LT		 1884 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1885 status, &exception));
1886 } while (exception.retry);
1887 return res;
1888}
1889
659bfcd6
TM		 1890static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1891 struct nfs_fattr *fattr, struct iattr *sattr,
1892 struct nfs4_state *state)
1da177e4 1893{
3e4f6290 1894 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1895 struct nfs_setattrargs arg = {
3e4f6290 1896 .fh = NFS_FH(inode),
1da177e4
LT		 1897 .iap = sattr,
1898 .server = server,
1899 .bitmask = server->attr_bitmask,
1900 };
1901 struct nfs_setattrres res = {
1902 .fattr = fattr,
1903 .server = server,
1904 };
1905 struct rpc_message msg = {
659bfcd6
TM		 1906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1907 .rpc_argp = &arg,
1908 .rpc_resp = &res,
1909 .rpc_cred = cred,
1da177e4 1910 };
26e976a8 1911 unsigned long timestamp = jiffies;
65e4308d 1912 int status;
1da177e4 1913
0e574af1 1914 nfs_fattr_init(fattr);
1da177e4 1915
3e4f6290
TM		 1916 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1917 /* Use that stateid */
1918 } else if (state != NULL) {
77041ed9 1919 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1920 } else
1da177e4
LT		 1921 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1922
7c513058 1923 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1924 if (status == 0 && state != NULL)
1925 renew_lease(server, timestamp);
65e4308d 1926 return status;
1da177e4
LT		 1927}
1928
659bfcd6
TM		 1929static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1930 struct nfs_fattr *fattr, struct iattr *sattr,
1931 struct nfs4_state *state)
1da177e4 1932{
3e4f6290 1933 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1934 struct nfs4_exception exception = { };
1935 int err;
1936 do {
1937 err = nfs4_handle_exception(server,
659bfcd6 1938 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1939 &exception);
1940 } while (exception.retry);
1941 return err;
1942}
1943
1944struct nfs4_closedata {
1945 struct inode *inode;
1946 struct nfs4_state *state;
1947 struct nfs_closeargs arg;
1948 struct nfs_closeres res;
516a6af6 1949 struct nfs_fattr fattr;
26e976a8 1950 unsigned long timestamp;
f7e8917a
FI		 1951 bool roc;
1952 u32 roc_barrier;
1da177e4
LT		 1953};
1954
963d8fe5 1955static void nfs4_free_closedata(void *data)
9512135d 1956{
963d8fe5
TM		 1957 struct nfs4_closedata *calldata = data;
1958 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1959 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1960
f7e8917a
FI		 1961 if (calldata->roc)
1962 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1963 nfs4_put_open_state(calldata->state);
1964 nfs_free_seqid(calldata->arg.seqid);
9512135d 1965 nfs4_put_state_owner(sp);
643168c2 1966 nfs_sb_deactive(sb);
9512135d
TM		 1967 kfree(calldata);
1968}
1969
88069f77
TM		 1970static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1971 fmode_t fmode)
1972{
1973 spin_lock(&state->owner->so_lock);
1974 if (!(fmode & FMODE_READ))
1975 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1976 if (!(fmode & FMODE_WRITE))
1977 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1978 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1979 spin_unlock(&state->owner->so_lock);
1980}
1981
963d8fe5 1982static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1983{
963d8fe5 1984 struct nfs4_closedata *calldata = data;
1da177e4 1985 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1986 struct nfs_server *server = NFS_SERVER(calldata->inode);
1987
a3ca5651 1988 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 1989 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1990 return;
1da177e4
LT		 1991 /* hmm. we are done with the inode, and in the process of freeing
1992 * the state_owner. we keep this around to process errors
1993 */
1da177e4
LT		 1994 switch (task->tk_status) {
1995 case 0:
f7e8917a
FI		 1996 if (calldata->roc)
1997 pnfs_roc_set_barrier(state->inode,
1998 calldata->roc_barrier);
45328c35 1999 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2000 renew_lease(server, calldata->timestamp);
88069f77
TM		 2001 nfs4_close_clear_stateid_flags(state,
2002 calldata->arg.fmode);
1da177e4
LT		 2003 break;
2004 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2005 case -NFS4ERR_OLD_STATEID:
2006 case -NFS4ERR_BAD_STATEID:
1da177e4 2007 case -NFS4ERR_EXPIRED:
dc0b027d 2008 if (calldata->arg.fmode == 0)
9e33bed5 2009 break;
1da177e4 2010 default:
72211dbe
TM		 2011 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2012 rpc_restart_call_prepare(task);
1da177e4 2013 }
72211dbe 2014 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2015 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2016 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2017}
2018
4ce70ada 2019static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2020{
4ce70ada 2021 struct nfs4_closedata *calldata = data;
9512135d 2022 struct nfs4_state *state = calldata->state;
88069f77 2023 int call_close = 0;
9512135d 2024
a3ca5651 2025 dprintk("%s: begin!\n", __func__);
963d8fe5 2026 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2027 return;
003707c7 2028
88069f77
TM		 2029 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2030 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2031 spin_lock(&state->owner->so_lock);
003707c7 2032 /* Calculate the change in open mode */
e7616923 2033 if (state->n_rdwr == 0) {
003707c7 2034 if (state->n_rdonly == 0) {
88069f77
TM		 2035 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2036 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2037 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2038 }
2039 if (state->n_wronly == 0) {
88069f77
TM		 2040 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2041 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2042 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2043 }
e7616923 2044 }
4cecb76f 2045 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2046
2047 if (!call_close) {
963d8fe5
TM		 2048 /* Note: exit _without_ calling nfs4_close_done */
2049 task->tk_action = NULL;
a3ca5651 2050 goto out;
9512135d 2051 }
88069f77 2052
f7e8917a 2053 if (calldata->arg.fmode == 0) {
88069f77 2054 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2055 if (calldata->roc &&
2056 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2057 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2058 task, NULL);
a3ca5651 2059 goto out;
f7e8917a
FI		 2060 }
2061 }
88069f77 2062
516a6af6 2063 nfs_fattr_init(calldata->res.fattr);
26e976a8 2064 calldata->timestamp = jiffies;
035168ab 2065 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2066 &calldata->arg.seq_args,
2067 &calldata->res.seq_res,
2068 task))
a3ca5651 2069 goto out;
5138fde0 2070 rpc_call_start(task);
a3ca5651
CL		 2071out:
2072 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2073}
2074
963d8fe5 2075static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2076 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2077 .rpc_call_done = nfs4_close_done,
2078 .rpc_release = nfs4_free_closedata,
2079};
2080
1da177e4
LT		 2081/*
2082 * It is possible for data to be read/written from a mem-mapped file
2083 * after the sys_close call (which hits the vfs layer as a flush).
2084 * This means that we can't safely call nfsv4 close on a file until
2085 * the inode is cleared. This in turn means that we are not good
2086 * NFSv4 citizens - we do not indicate to the server to update the file's
2087 * share state even when we are done with one of the three share
2088 * stateid's in the inode.
2089 *
2090 * NOTE: Caller must be holding the sp->so_owner semaphore!
2091 */
643168c2 2092int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2093{
4a35bd41 2094 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2095 struct nfs4_closedata *calldata;
b39e625b
TM		 2096 struct nfs4_state_owner *sp = state->owner;
2097 struct rpc_task *task;
5138fde0
TM		 2098 struct rpc_message msg = {
2099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2100 .rpc_cred = state->owner->so_cred,
2101 };
c970aa85
TM		 2102 struct rpc_task_setup task_setup_data = {
2103 .rpc_client = server->client,
5138fde0 2104 .rpc_message = &msg,
c970aa85 2105 .callback_ops = &nfs4_close_ops,
101070ca 2106 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2107 .flags = RPC_TASK_ASYNC,
2108 };
9512135d 2109 int status = -ENOMEM;
1da177e4 2110
8535b2be 2111 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2112 if (calldata == NULL)
9512135d 2113 goto out;
9d12b216 2114 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2115 calldata->inode = state->inode;
1da177e4 2116 calldata->state = state;
4a35bd41 2117 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2118 calldata->arg.stateid = &state->open_stateid;
1da177e4 2119 /* Serialization for the sequence id */
8535b2be 2120 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2121 if (calldata->arg.seqid == NULL)
2122 goto out_free_calldata;
dc0b027d 2123 calldata->arg.fmode = 0;
a65318bf 2124 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2125 calldata->res.fattr = &calldata->fattr;
c1d51931 2126 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2127 calldata->res.server = server;
f7e8917a 2128 calldata->roc = roc;
643168c2 2129 nfs_sb_active(calldata->inode->i_sb);
9512135d 2130
1174dd1f
TM		 2131 msg.rpc_argp = &calldata->arg;
2132 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2133 task_setup_data.callback_data = calldata;
2134 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2135 if (IS_ERR(task))
2136 return PTR_ERR(task);
a49c3c77
TM		 2137 status = 0;
2138 if (wait)
2139 status = rpc_wait_for_completion_task(task);
b39e625b 2140 rpc_put_task(task);
a49c3c77 2141 return status;
9512135d
TM		 2142out_free_calldata:
2143 kfree(calldata);
2144out:
f7e8917a
FI		 2145 if (roc)
2146 pnfs_roc_release(state->inode);
b39e625b
TM		 2147 nfs4_put_open_state(state);
2148 nfs4_put_state_owner(sp);
9512135d 2149 return status;
1da177e4
LT		 2150}
2151
2b484297 2152static struct inode *
cd9a1c0e 2153nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2154{
1da177e4 2155 struct nfs4_state *state;
1da177e4 2156
565277f6 2157 /* Protect against concurrent sillydeletes */
3d4ff43d 2158 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2159 if (IS_ERR(state))
2160 return ERR_CAST(state);
cd9a1c0e 2161 ctx->state = state;
f46e0bd3 2162 return igrab(state->inode);
1da177e4
LT		 2163}
2164
1185a552 2165static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2166{
2167 if (ctx->state == NULL)
2168 return;
2169 if (is_sync)
643168c2 2170 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2171 else
643168c2 2172 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2173}
1da177e4
LT		 2174
2175static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2176{
43652ad5
BH		 2177 struct nfs4_server_caps_arg args = {
2178 .fhandle = fhandle,
2179 };
1da177e4
LT		 2180 struct nfs4_server_caps_res res = {};
2181 struct rpc_message msg = {
2182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2183 .rpc_argp = &args,
1da177e4
LT		 2184 .rpc_resp = &res,
2185 };
2186 int status;
2187
7c513058 2188 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2189 if (status == 0) {
2190 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2191 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2192 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2193 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2194 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2195 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2196 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2197 server->caps |= NFS_CAP_ACLS;
2198 if (res.has_links != 0)
2199 server->caps |= NFS_CAP_HARDLINKS;
2200 if (res.has_symlinks != 0)
2201 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2202 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2203 server->caps |= NFS_CAP_FILEID;
2204 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2205 server->caps |= NFS_CAP_MODE;
2206 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2207 server->caps |= NFS_CAP_NLINK;
2208 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2209 server->caps |= NFS_CAP_OWNER;
2210 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2211 server->caps |= NFS_CAP_OWNER_GROUP;
2212 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2213 server->caps |= NFS_CAP_ATIME;
2214 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2215 server->caps |= NFS_CAP_CTIME;
2216 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2217 server->caps |= NFS_CAP_MTIME;
2218
a65318bf
TM		 2219 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2220 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2221 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2222 server->acl_bitmask = res.acl_bitmask;
264e6351 2223 server->fh_expire_type = res.fh_expire_type;
1da177e4 2224 }
cccef3b9 2225
1da177e4
LT		 2226 return status;
2227}
2228
55a97593 2229int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2230{
2231 struct nfs4_exception exception = { };
2232 int err;
2233 do {
2234 err = nfs4_handle_exception(server,
2235 _nfs4_server_capabilities(server, fhandle),
2236 &exception);
2237 } while (exception.retry);
2238 return err;
2239}
2240
2241static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2242 struct nfs_fsinfo *info)
2243{
1da177e4
LT		 2244 struct nfs4_lookup_root_arg args = {
2245 .bitmask = nfs4_fattr_bitmap,
2246 };
2247 struct nfs4_lookup_res res = {
2248 .server = server,
0e574af1 2249 .fattr = info->fattr,
1da177e4
LT		 2250 .fh = fhandle,
2251 };
2252 struct rpc_message msg = {
2253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2254 .rpc_argp = &args,
2255 .rpc_resp = &res,
2256 };
008f55d0 2257
0e574af1 2258 nfs_fattr_init(info->fattr);
7c513058 2259 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2260}
2261
2262static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2263 struct nfs_fsinfo *info)
2264{
2265 struct nfs4_exception exception = { };
2266 int err;
2267 do {
fb8a5ba8
BS		 2268 err = _nfs4_lookup_root(server, fhandle, info);
2269 switch (err) {
2270 case 0:
2271 case -NFS4ERR_WRONGSEC:
2272 break;
2273 default:
2274 err = nfs4_handle_exception(server, err, &exception);
2275 }
1da177e4
LT		 2276 } while (exception.retry);
2277 return err;
2278}
2279
8f70e95f
BS		 2280static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2281 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2282{
2283 struct rpc_auth *auth;
2284 int ret;
2285
2286 auth = rpcauth_create(flavor, server->client);
2287 if (!auth) {
2288 ret = -EIO;
2289 goto out;
2290 }
2291 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2292out:
2293 return ret;
2294}
2295
801a16dc 2296static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2297 struct nfs_fsinfo *info)
1da177e4 2298{
8f70e95f 2299 int i, len, status = 0;
0fabee24 2300 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2301
801a16dc
BS		 2302 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2303 flav_array[len] = RPC_AUTH_NULL;
2304 len += 1;
8f70e95f
BS		 2305
2306 for (i = 0; i < len; i++) {
2307 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2308 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2309 continue;
2310 break;
8f70e95f 2311 }
fb8a5ba8
BS		 2312 /*
2313 * -EACCESS could mean that the user doesn't have correct permissions
2314 * to access the mount. It could also mean that we tried to mount
2315 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2316 * existing mount programs don't handle -EACCES very well so it should
2317 * be mapped to -EPERM instead.
2318 */
2319 if (status == -EACCES)
2320 status = -EPERM;
801a16dc
BS		 2321 return status;
2322}
2323
2324/*
2325 * get the file handle for the "/" directory on the server
2326 */
2327static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2328 struct nfs_fsinfo *info)
2329{
fca78d6d 2330 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2331 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2332 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2333 /*
2334 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2335 * by nfs4_map_errors() as this function exits.
2336 */
fca78d6d 2337 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2338 if (status == 0)
2339 status = nfs4_server_capabilities(server, fhandle);
2340 if (status == 0)
2341 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2342 return nfs4_map_errors(status);
1da177e4
LT		 2343}
2344
6b97fd3d
MN		 2345/*
2346 * Get locations and (maybe) other attributes of a referral.
2347 * Note that we'll actually follow the referral later when
2348 * we detect fsid mismatch in inode revalidation
2349 */
533eb461
AA		 2350static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2351 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2352{
2353 int status = -ENOMEM;
2354 struct page *page = NULL;
2355 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2356
2357 page = alloc_page(GFP_KERNEL);
2358 if (page == NULL)
2359 goto out;
2360 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2361 if (locations == NULL)
2362 goto out;
2363
c228fd3a 2364 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2365 if (status != 0)
2366 goto out;
2367 /* Make sure server returned a different fsid for the referral */
2368 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2369 dprintk("%s: server did not return a different fsid for"
2370 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2371 status = -EIO;
2372 goto out;
2373 }
533eb461
AA		 2374 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2375 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2376
533eb461 2377 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2378 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2379 memset(fhandle, 0, sizeof(struct nfs_fh));
2380out:
2381 if (page)
2382 __free_page(page);
5d7ca35a 2383 kfree(locations);
6b97fd3d
MN		 2384 return status;
2385}
2386
1da177e4
LT		 2387static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2388{
2389 struct nfs4_getattr_arg args = {
2390 .fh = fhandle,
2391 .bitmask = server->attr_bitmask,
2392 };
2393 struct nfs4_getattr_res res = {
2394 .fattr = fattr,
2395 .server = server,
2396 };
2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2399 .rpc_argp = &args,
2400 .rpc_resp = &res,
2401 };
2402
0e574af1 2403 nfs_fattr_init(fattr);
7c513058 2404 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2405}
2406
2407static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2408{
2409 struct nfs4_exception exception = { };
2410 int err;
2411 do {
2412 err = nfs4_handle_exception(server,
2413 _nfs4_proc_getattr(server, fhandle, fattr),
2414 &exception);
2415 } while (exception.retry);
2416 return err;
2417}
2418
2419/*
2420 * The file is not closed if it is opened due to the a request to change
2421 * the size of the file. The open call will not be needed once the
2422 * VFS layer lookup-intents are implemented.
2423 *
2424 * Close is called when the inode is destroyed.
2425 * If we haven't opened the file for O_WRONLY, we
2426 * need to in the size_change case to obtain a stateid.
2427 *
2428 * Got race?
2429 * Because OPEN is always done by name in nfsv4, it is
2430 * possible that we opened a different file by the same
2431 * name. We can recognize this race condition, but we
2432 * can't do anything about it besides returning an error.
2433 *
2434 * This will be fixed with VFS changes (lookup-intent).
2435 */
2436static int
2437nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2438 struct iattr *sattr)
2439{
08e9eac4 2440 struct inode *inode = dentry->d_inode;
659bfcd6 2441 struct rpc_cred *cred = NULL;
d530838b 2442 struct nfs4_state *state = NULL;
1da177e4
LT		 2443 int status;
2444
8a1636c4
BH		 2445 if (pnfs_ld_layoutret_on_setattr(inode))
2446 pnfs_return_layout(inode);
2447
0e574af1 2448 nfs_fattr_init(fattr);
1da177e4 2449
d530838b 2450 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2451 if (sattr->ia_valid & ATTR_FILE) {
2452 struct nfs_open_context *ctx;
2453
2454 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2455 if (ctx) {
2456 cred = ctx->cred;
2457 state = ctx->state;
2458 }
659bfcd6 2459 }
08e9eac4 2460
536e43d1
TM		 2461 /* Deal with open(O_TRUNC) */
2462 if (sattr->ia_valid & ATTR_OPEN)
2463 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2464
659bfcd6 2465 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2466 if (status == 0)
2467 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2468 return status;
2469}
2470
0c2e53f1
TM		 2471static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2472 const struct qstr *name, struct nfs_fh *fhandle,
2473 struct nfs_fattr *fattr)
2b3de441 2474{
0c2e53f1 2475 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2476 int status;
2477 struct nfs4_lookup_arg args = {
2478 .bitmask = server->attr_bitmask,
0c2e53f1 2479 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2480 .name = name,
2481 };
2482 struct nfs4_lookup_res res = {
2483 .server = server,
2484 .fattr = fattr,
2485 .fh = fhandle,
2486 };
2487 struct rpc_message msg = {
2488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2489 .rpc_argp = &args,
2490 .rpc_resp = &res,
2491 };
2492
2493 nfs_fattr_init(fattr);
2494
1da177e4 2495 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2496 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2497 dprintk("NFS reply lookup: %d\n", status);
2498 return status;
2499}
2500
7ebb9315
BS		 2501void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2502{
2503 memset(fh, 0, sizeof(struct nfs_fh));
2504 fattr->fsid.major = 1;
2505 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2506 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2507 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2508 fattr->nlink = 2;
2509}
2510
7c513058
BS		 2511static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2512 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2513{
2514 struct nfs4_exception exception = { };
2515 int err;
2516 do {
0c2e53f1
TM		 2517 int status;
2518
2519 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2520 switch (status) {
08ef7bd3
TM		 2521 case -NFS4ERR_BADNAME:
2522 return -ENOENT;
0c2e53f1 2523 case -NFS4ERR_MOVED:
a6f498a8 2524 return nfs4_get_referral(dir, name, fattr, fhandle);
0c2e53f1 2525 case -NFS4ERR_WRONGSEC:
7ebb9315 2526 nfs_fixup_secinfo_attributes(fattr, fhandle);
0c2e53f1
TM		 2527 }
2528 err = nfs4_handle_exception(NFS_SERVER(dir),
2529 status, &exception);
1da177e4
LT		 2530 } while (exception.retry);
2531 return err;
2532}
2533
2534static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2535{
76b32999 2536 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2537 struct nfs4_accessargs args = {
2538 .fh = NFS_FH(inode),
a4980e78 2539 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2540 };
2541 struct nfs4_accessres res = {
2542 .server = server,
1da177e4 2543 };
1da177e4
LT		 2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2546 .rpc_argp = &args,
2547 .rpc_resp = &res,
2548 .rpc_cred = entry->cred,
2549 };
2550 int mode = entry->mask;
2551 int status;
2552
2553 /*
2554 * Determine which access bits we want to ask for...
2555 */
2556 if (mode & MAY_READ)
2557 args.access |= NFS4_ACCESS_READ;
2558 if (S_ISDIR(inode->i_mode)) {
2559 if (mode & MAY_WRITE)
2560 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2561 if (mode & MAY_EXEC)
2562 args.access |= NFS4_ACCESS_LOOKUP;
2563 } else {
2564 if (mode & MAY_WRITE)
2565 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2566 if (mode & MAY_EXEC)
2567 args.access |= NFS4_ACCESS_EXECUTE;
2568 }
c407d41a
TM		 2569
2570 res.fattr = nfs_alloc_fattr();
2571 if (res.fattr == NULL)
2572 return -ENOMEM;
2573
7c513058 2574 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2575 if (!status) {
2576 entry->mask = 0;
2577 if (res.access & NFS4_ACCESS_READ)
2578 entry->mask |= MAY_READ;
2579 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2580 entry->mask |= MAY_WRITE;
2581 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2582 entry->mask |= MAY_EXEC;
c407d41a 2583 nfs_refresh_inode(inode, res.fattr);
1da177e4 2584 }
c407d41a 2585 nfs_free_fattr(res.fattr);
1da177e4
LT		 2586 return status;
2587}
2588
2589static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2590{
2591 struct nfs4_exception exception = { };
2592 int err;
2593 do {
2594 err = nfs4_handle_exception(NFS_SERVER(inode),
2595 _nfs4_proc_access(inode, entry),
2596 &exception);
2597 } while (exception.retry);
2598 return err;
2599}
2600
2601/*
2602 * TODO: For the time being, we don't try to get any attributes
2603 * along with any of the zero-copy operations READ, READDIR,
2604 * READLINK, WRITE.
2605 *
2606 * In the case of the first three, we want to put the GETATTR
2607 * after the read-type operation -- this is because it is hard
2608 * to predict the length of a GETATTR response in v4, and thus
2609 * align the READ data correctly. This means that the GETATTR
2610 * may end up partially falling into the page cache, and we should
2611 * shift it into the 'tail' of the xdr_buf before processing.
2612 * To do this efficiently, we need to know the total length
2613 * of data received, which doesn't seem to be available outside
2614 * of the RPC layer.
2615 *
2616 * In the case of WRITE, we also want to put the GETATTR after
2617 * the operation -- in this case because we want to make sure
2618 * we get the post-operation mtime and size. This means that
2619 * we can't use xdr_encode_pages() as written: we need a variant
2620 * of it which would leave room in the 'tail' iovec.
2621 *
2622 * Both of these changes to the XDR layer would in fact be quite
2623 * minor, but I decided to leave them for a subsequent patch.
2624 */
2625static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2626 unsigned int pgbase, unsigned int pglen)
2627{
2628 struct nfs4_readlink args = {
2629 .fh = NFS_FH(inode),
2630 .pgbase = pgbase,
2631 .pglen = pglen,
2632 .pages = &page,
2633 };
f50c7000 2634 struct nfs4_readlink_res res;
1da177e4
LT		 2635 struct rpc_message msg = {
2636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2637 .rpc_argp = &args,
f50c7000 2638 .rpc_resp = &res,
1da177e4
LT		 2639 };
2640
7c513058 2641 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2642}
2643
2644static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2645 unsigned int pgbase, unsigned int pglen)
2646{
2647 struct nfs4_exception exception = { };
2648 int err;
2649 do {
2650 err = nfs4_handle_exception(NFS_SERVER(inode),
2651 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2652 &exception);
2653 } while (exception.retry);
2654 return err;
2655}
2656
1da177e4
LT		 2657/*
2658 * Got race?
2659 * We will need to arrange for the VFS layer to provide an atomic open.
2660 * Until then, this create/open method is prone to inefficiency and race
2661 * conditions due to the lookup, create, and open VFS calls from sys_open()
2662 * placed on the wire.
2663 *
2664 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2665 * The file will be opened again in the subsequent VFS open call
2666 * (nfs4_proc_file_open).
2667 *
2668 * The open for read will just hang around to be used by any process that
2669 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2670 */
2671
2672static int
2673nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2674 int flags, struct nfs_open_context *ctx)
1da177e4 2675{
82a2c1b7 2676 struct dentry *de = dentry;
1da177e4 2677 struct nfs4_state *state;
c0204fd2
TM		 2678 struct rpc_cred *cred = NULL;
2679 fmode_t fmode = 0;
1da177e4
LT		 2680 int status = 0;
2681
c0204fd2
TM		 2682 if (ctx != NULL) {
2683 cred = ctx->cred;
3d4ff43d 2684 de = ctx->dentry;
c0204fd2 2685 fmode = ctx->mode;
1da177e4 2686 }
a8a5da99 2687 sattr->ia_mode &= ~current_umask();
82a2c1b7 2688 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2689 d_drop(dentry);
1da177e4
LT		 2690 if (IS_ERR(state)) {
2691 status = PTR_ERR(state);
c0204fd2 2692 goto out;
1da177e4 2693 }
d4d9cdcb 2694 d_add(dentry, igrab(state->inode));
d75340cc 2695 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2696 if (ctx != NULL)
2697 ctx->state = state;
02a913a7 2698 else
643168c2 2699 nfs4_close_sync(state, fmode);
1da177e4
LT		 2700out:
2701 return status;
2702}
2703
2704static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2705{
16e42959 2706 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2707 struct nfs_removeargs args = {
1da177e4 2708 .fh = NFS_FH(dir),
4fdc17b2
TM		 2709 .name.len = name->len,
2710 .name.name = name->name,
16e42959
TM		 2711 .bitmask = server->attr_bitmask,
2712 };
4fdc17b2 2713 struct nfs_removeres res = {
16e42959 2714 .server = server,
1da177e4 2715 };
1da177e4 2716 struct rpc_message msg = {
4fdc17b2
TM		 2717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2718 .rpc_argp = &args,
2719 .rpc_resp = &res,
1da177e4 2720 };
d346890b
TM		 2721 int status = -ENOMEM;
2722
2723 res.dir_attr = nfs_alloc_fattr();
2724 if (res.dir_attr == NULL)
2725 goto out;
1da177e4 2726
7c513058 2727 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2728 if (status == 0) {
2729 update_changeattr(dir, &res.cinfo);
d346890b 2730 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2731 }
d346890b
TM		 2732 nfs_free_fattr(res.dir_attr);
2733out:
1da177e4
LT		 2734 return status;
2735}
2736
2737static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2738{
2739 struct nfs4_exception exception = { };
2740 int err;
2741 do {
2742 err = nfs4_handle_exception(NFS_SERVER(dir),
2743 _nfs4_proc_remove(dir, name),
2744 &exception);
2745 } while (exception.retry);
2746 return err;
2747}
2748
e4eff1a6 2749static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2750{
e4eff1a6
TM		 2751 struct nfs_server *server = NFS_SERVER(dir);
2752 struct nfs_removeargs *args = msg->rpc_argp;
2753 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2754
a65318bf 2755 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2756 res->server = server;
1da177e4 2757 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2758 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2759}
2760
e4eff1a6 2761static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2762{
e4eff1a6
TM		 2763 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2764
14516c3a
TM		 2765 if (!nfs4_sequence_done(task, &res->seq_res))
2766 return 0;
9e33bed5 2767 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2768 return 0;
2769 update_changeattr(dir, &res->cinfo);
d346890b 2770 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2771 return 1;
1da177e4
LT		 2772}
2773
d3d4152a
JL		 2774static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2775{
2776 struct nfs_server *server = NFS_SERVER(dir);
2777 struct nfs_renameargs *arg = msg->rpc_argp;
2778 struct nfs_renameres *res = msg->rpc_resp;
2779
2780 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2781 arg->bitmask = server->attr_bitmask;
2782 res->server = server;
9d12b216 2783 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2784}
2785
2786static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2787 struct inode *new_dir)
2788{
2789 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2790
2791 if (!nfs4_sequence_done(task, &res->seq_res))
2792 return 0;
2793 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2794 return 0;
2795
2796 update_changeattr(old_dir, &res->old_cinfo);
2797 nfs_post_op_update_inode(old_dir, res->old_fattr);
2798 update_changeattr(new_dir, &res->new_cinfo);
2799 nfs_post_op_update_inode(new_dir, res->new_fattr);
2800 return 1;
2801}
2802
1da177e4
LT		 2803static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2804 struct inode *new_dir, struct qstr *new_name)
2805{
6caf2c82 2806 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2807 struct nfs_renameargs arg = {
1da177e4
LT		 2808 .old_dir = NFS_FH(old_dir),
2809 .new_dir = NFS_FH(new_dir),
2810 .old_name = old_name,
2811 .new_name = new_name,
6caf2c82
TM		 2812 .bitmask = server->attr_bitmask,
2813 };
e8582a8b 2814 struct nfs_renameres res = {
6caf2c82 2815 .server = server,
1da177e4 2816 };
1da177e4
LT		 2817 struct rpc_message msg = {
2818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2819 .rpc_argp = &arg,
2820 .rpc_resp = &res,
2821 };
011fff72 2822 int status = -ENOMEM;
1da177e4 2823
011fff72
TM		 2824 res.old_fattr = nfs_alloc_fattr();
2825 res.new_fattr = nfs_alloc_fattr();
2826 if (res.old_fattr == NULL || res.new_fattr == NULL)
2827 goto out;
1da177e4 2828
7c513058 2829 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2830 if (!status) {
2831 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2832 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2833 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2834 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2835 }
011fff72
TM		 2836out:
2837 nfs_free_fattr(res.new_fattr);
2838 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2839 return status;
2840}
2841
2842static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2843 struct inode *new_dir, struct qstr *new_name)
2844{
2845 struct nfs4_exception exception = { };
2846 int err;
2847 do {
2848 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2849 _nfs4_proc_rename(old_dir, old_name,
2850 new_dir, new_name),
2851 &exception);
2852 } while (exception.retry);
2853 return err;
2854}
2855
2856static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2857{
91ba2eee 2858 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2859 struct nfs4_link_arg arg = {
2860 .fh = NFS_FH(inode),
2861 .dir_fh = NFS_FH(dir),
2862 .name = name,
91ba2eee
TM		 2863 .bitmask = server->attr_bitmask,
2864 };
91ba2eee
TM		 2865 struct nfs4_link_res res = {
2866 .server = server,
1da177e4 2867 };
1da177e4
LT		 2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2870 .rpc_argp = &arg,
91ba2eee 2871 .rpc_resp = &res,
1da177e4 2872 };
136f2627
TM		 2873 int status = -ENOMEM;
2874
2875 res.fattr = nfs_alloc_fattr();
2876 res.dir_attr = nfs_alloc_fattr();
2877 if (res.fattr == NULL || res.dir_attr == NULL)
2878 goto out;
1da177e4 2879
7c513058 2880 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2881 if (!status) {
2882 update_changeattr(dir, &res.cinfo);
2883 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2884 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2885 }
136f2627
TM		 2886out:
2887 nfs_free_fattr(res.dir_attr);
2888 nfs_free_fattr(res.fattr);
1da177e4
LT		 2889 return status;
2890}
2891
2892static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2893{
2894 struct nfs4_exception exception = { };
2895 int err;
2896 do {
2897 err = nfs4_handle_exception(NFS_SERVER(inode),
2898 _nfs4_proc_link(inode, dir, name),
2899 &exception);
2900 } while (exception.retry);
2901 return err;
2902}
2903
57dc9a57
TM		 2904struct nfs4_createdata {
2905 struct rpc_message msg;
2906 struct nfs4_create_arg arg;
2907 struct nfs4_create_res res;
2908 struct nfs_fh fh;
2909 struct nfs_fattr fattr;
2910 struct nfs_fattr dir_fattr;
2911};
2912
2913static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2914 struct qstr *name, struct iattr *sattr, u32 ftype)
2915{
2916 struct nfs4_createdata *data;
2917
2918 data = kzalloc(sizeof(*data), GFP_KERNEL);
2919 if (data != NULL) {
2920 struct nfs_server *server = NFS_SERVER(dir);
2921
2922 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2923 data->msg.rpc_argp = &data->arg;
2924 data->msg.rpc_resp = &data->res;
2925 data->arg.dir_fh = NFS_FH(dir);
2926 data->arg.server = server;
2927 data->arg.name = name;
2928 data->arg.attrs = sattr;
2929 data->arg.ftype = ftype;
2930 data->arg.bitmask = server->attr_bitmask;
2931 data->res.server = server;
2932 data->res.fh = &data->fh;
2933 data->res.fattr = &data->fattr;
2934 data->res.dir_fattr = &data->dir_fattr;
2935 nfs_fattr_init(data->res.fattr);
2936 nfs_fattr_init(data->res.dir_fattr);
2937 }
2938 return data;
2939}
2940
2941static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2942{
7c513058 2943 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2944 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2945 if (status == 0) {
2946 update_changeattr(dir, &data->res.dir_cinfo);
2947 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2948 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2949 }
2950 return status;
2951}
2952
2953static void nfs4_free_createdata(struct nfs4_createdata *data)
2954{
2955 kfree(data);
2956}
2957
4f390c15 2958static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2959 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2960{
57dc9a57
TM		 2961 struct nfs4_createdata *data;
2962 int status = -ENAMETOOLONG;
1da177e4 2963
94a6d753 2964 if (len > NFS4_MAXPATHLEN)
57dc9a57 2965 goto out;
4f390c15 2966
57dc9a57
TM		 2967 status = -ENOMEM;
2968 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2969 if (data == NULL)
2970 goto out;
2971
2972 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2973 data->arg.u.symlink.pages = &page;
2974 data->arg.u.symlink.len = len;
1da177e4 2975
57dc9a57
TM		 2976 status = nfs4_do_create(dir, dentry, data);
2977
2978 nfs4_free_createdata(data);
2979out:
1da177e4
LT		 2980 return status;
2981}
2982
4f390c15 2983static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2984 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2985{
2986 struct nfs4_exception exception = { };
2987 int err;
2988 do {
2989 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2990 _nfs4_proc_symlink(dir, dentry, page,
2991 len, sattr),
1da177e4
LT		 2992 &exception);
2993 } while (exception.retry);
2994 return err;
2995}
2996
2997static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2998 struct iattr *sattr)
2999{
57dc9a57
TM		 3000 struct nfs4_createdata *data;
3001 int status = -ENOMEM;
1da177e4 3002
57dc9a57
TM		 3003 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3004 if (data == NULL)
3005 goto out;
3006
3007 status = nfs4_do_create(dir, dentry, data);
3008
3009 nfs4_free_createdata(data);
3010out:
1da177e4
LT		 3011 return status;
3012}
3013
3014static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3015 struct iattr *sattr)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
a8a5da99
AK		 3019
3020 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3021 do {
3022 err = nfs4_handle_exception(NFS_SERVER(dir),
3023 _nfs4_proc_mkdir(dir, dentry, sattr),
3024 &exception);
3025 } while (exception.retry);
3026 return err;
3027}
3028
3029static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3030 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3031{
3032 struct inode *dir = dentry->d_inode;
3033 struct nfs4_readdir_arg args = {
3034 .fh = NFS_FH(dir),
56e4ebf8 3035 .pages = pages,
1da177e4
LT		 3036 .pgbase = 0,
3037 .count = count,
96d25e53 3038 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3039 .plus = plus,
1da177e4
LT		 3040 };
3041 struct nfs4_readdir_res res;
3042 struct rpc_message msg = {
3043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3044 .rpc_argp = &args,
3045 .rpc_resp = &res,
3046 .rpc_cred = cred,
3047 };
3048 int status;
3049
3110ff80 3050 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3051 dentry->d_parent->d_name.name,
3052 dentry->d_name.name,
3053 (unsigned long long)cookie);
1da177e4
LT		 3054 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3055 res.pgbase = args.pgbase;
7c513058 3056 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3057 if (status >= 0) {
1da177e4 3058 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3059 status += args.pgbase;
3060 }
c4812998
TM		 3061
3062 nfs_invalidate_atime(dir);
3063
3110ff80 3064 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3065 return status;
3066}
3067
3068static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3069 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3070{
3071 struct nfs4_exception exception = { };
3072 int err;
3073 do {
3074 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3075 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3076 pages, count, plus),
1da177e4
LT		 3077 &exception);
3078 } while (exception.retry);
3079 return err;
3080}
3081
3082static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3083 struct iattr *sattr, dev_t rdev)
3084{
57dc9a57
TM		 3085 struct nfs4_createdata *data;
3086 int mode = sattr->ia_mode;
3087 int status = -ENOMEM;
1da177e4
LT		 3088
3089 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3090 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3091
3092 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3093 if (data == NULL)
3094 goto out;
3095
1da177e4 3096 if (S_ISFIFO(mode))
57dc9a57 3097 data->arg.ftype = NF4FIFO;
1da177e4 3098 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3099 data->arg.ftype = NF4BLK;
3100 data->arg.u.device.specdata1 = MAJOR(rdev);
3101 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3102 }
3103 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3104 data->arg.ftype = NF4CHR;
3105 data->arg.u.device.specdata1 = MAJOR(rdev);
3106 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3107 }
1da177e4 3108
57dc9a57
TM		 3109 status = nfs4_do_create(dir, dentry, data);
3110
3111 nfs4_free_createdata(data);
3112out:
1da177e4
LT		 3113 return status;
3114}
3115
3116static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3117 struct iattr *sattr, dev_t rdev)
3118{
3119 struct nfs4_exception exception = { };
3120 int err;
a8a5da99
AK		 3121
3122 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3123 do {
3124 err = nfs4_handle_exception(NFS_SERVER(dir),
3125 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3126 &exception);
3127 } while (exception.retry);
3128 return err;
3129}
3130
3131static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3132 struct nfs_fsstat *fsstat)
3133{
3134 struct nfs4_statfs_arg args = {
3135 .fh = fhandle,
3136 .bitmask = server->attr_bitmask,
3137 };
24ad148a
BH		 3138 struct nfs4_statfs_res res = {
3139 .fsstat = fsstat,
3140 };
1da177e4
LT		 3141 struct rpc_message msg = {
3142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3143 .rpc_argp = &args,
24ad148a 3144 .rpc_resp = &res,
1da177e4
LT		 3145 };
3146
0e574af1 3147 nfs_fattr_init(fsstat->fattr);
7c513058 3148 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3149}
3150
3151static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3152{
3153 struct nfs4_exception exception = { };
3154 int err;
3155 do {
3156 err = nfs4_handle_exception(server,
3157 _nfs4_proc_statfs(server, fhandle, fsstat),
3158 &exception);
3159 } while (exception.retry);
3160 return err;
3161}
3162
3163static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3164 struct nfs_fsinfo *fsinfo)
3165{
3166 struct nfs4_fsinfo_arg args = {
3167 .fh = fhandle,
3168 .bitmask = server->attr_bitmask,
3169 };
3dda5e43
BH		 3170 struct nfs4_fsinfo_res res = {
3171 .fsinfo = fsinfo,
3172 };
1da177e4
LT		 3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3175 .rpc_argp = &args,
3dda5e43 3176 .rpc_resp = &res,
1da177e4
LT		 3177 };
3178
7c513058 3179 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3180}
3181
3182static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3183{
3184 struct nfs4_exception exception = { };
3185 int err;
3186
3187 do {
3188 err = nfs4_handle_exception(server,
3189 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3190 &exception);
3191 } while (exception.retry);
3192 return err;
3193}
3194
3195static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3196{
0e574af1 3197 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3198 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3199}
3200
3201static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3202 struct nfs_pathconf *pathconf)
3203{
3204 struct nfs4_pathconf_arg args = {
3205 .fh = fhandle,
3206 .bitmask = server->attr_bitmask,
3207 };
d45b2989
BH		 3208 struct nfs4_pathconf_res res = {
3209 .pathconf = pathconf,
3210 };
1da177e4
LT		 3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3213 .rpc_argp = &args,
d45b2989 3214 .rpc_resp = &res,
1da177e4
LT		 3215 };
3216
3217 /* None of the pathconf attributes are mandatory to implement */
3218 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3219 memset(pathconf, 0, sizeof(*pathconf));
3220 return 0;
3221 }
3222
0e574af1 3223 nfs_fattr_init(pathconf->fattr);
7c513058 3224 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3225}
3226
3227static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3228 struct nfs_pathconf *pathconf)
3229{
3230 struct nfs4_exception exception = { };
3231 int err;
3232
3233 do {
3234 err = nfs4_handle_exception(server,
3235 _nfs4_proc_pathconf(server, fhandle, pathconf),
3236 &exception);
3237 } while (exception.retry);
3238 return err;
3239}
3240
d20581aa
BH		 3241void __nfs4_read_done_cb(struct nfs_read_data *data)
3242{
3243 nfs_invalidate_atime(data->inode);
3244}
3245
cbdabc7f 3246static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3247{
ec06c096 3248 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3249
9e33bed5 3250 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3251 rpc_restart_call_prepare(task);
ec06c096 3252 return -EAGAIN;
1da177e4 3253 }
8850df99 3254
d20581aa 3255 __nfs4_read_done_cb(data);
1da177e4 3256 if (task->tk_status > 0)
ec06c096
TM		 3257 renew_lease(server, data->timestamp);
3258 return 0;
1da177e4
LT		 3259}
3260
cbdabc7f
AA		 3261static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3262{
3263
3264 dprintk("--> %s\n", __func__);
3265
3266 if (!nfs4_sequence_done(task, &data->res.seq_res))
3267 return -EAGAIN;
3268
d20581aa
BH		 3269 return data->read_done_cb ? data->read_done_cb(task, data) :
3270 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3271}
3272
bdc7f021 3273static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3274{
1da177e4 3275 data->timestamp = jiffies;
cbdabc7f 3276 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3277 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3278 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3279}
3280
cbdabc7f
AA		 3281/* Reset the the nfs_read_data to send the read to the MDS. */
3282void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3283{
3284 dprintk("%s Reset task for i/o through\n", __func__);
3285 put_lseg(data->lseg);
3286 data->lseg = NULL;
3287 /* offsets will differ in the dense stripe case */
3288 data->args.offset = data->mds_offset;
3289 data->ds_clp = NULL;
3290 data->args.fh = NFS_FH(data->inode);
3291 data->read_done_cb = nfs4_read_done_cb;
3292 task->tk_ops = data->mds_ops;
3293 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3294}
3295EXPORT_SYMBOL_GPL(nfs4_reset_read);
3296
b029bc9b 3297static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3298{
1da177e4
LT		 3299 struct inode *inode = data->inode;
3300
9e33bed5 3301 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3302 rpc_restart_call_prepare(task);
788e7a89 3303 return -EAGAIN;
1da177e4 3304 }
4f9838c7 3305 if (task->tk_status >= 0) {
1da177e4 3306 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3307 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3308 }
788e7a89 3309 return 0;
1da177e4
LT		 3310}
3311
b029bc9b
FI		 3312static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3313{
3314 if (!nfs4_sequence_done(task, &data->res.seq_res))
3315 return -EAGAIN;
d20581aa
BH		 3316 return data->write_done_cb ? data->write_done_cb(task, data) :
3317 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3318}
3319
a69aef14
FI		 3320/* Reset the the nfs_write_data to send the write to the MDS. */
3321void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3322{
3323 dprintk("%s Reset task for i/o through\n", __func__);
3324 put_lseg(data->lseg);
3325 data->lseg = NULL;
3326 data->ds_clp = NULL;
3327 data->write_done_cb = nfs4_write_done_cb;
3328 data->args.fh = NFS_FH(data->inode);
3329 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3330 data->args.offset = data->mds_offset;
3331 data->res.fattr = &data->fattr;
3332 task->tk_ops = data->mds_ops;
3333 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3334}
3335EXPORT_SYMBOL_GPL(nfs4_reset_write);
3336
bdc7f021 3337static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3338{
bdc7f021
TM		 3339 struct nfs_server *server = NFS_SERVER(data->inode);
3340
7ffd1064
FI		 3341 if (data->lseg) {
3342 data->args.bitmask = NULL;
3343 data->res.fattr = NULL;
3344 } else
3345 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3346 if (!data->write_done_cb)
3347 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3348 data->res.server = server;
1da177e4
LT		 3349 data->timestamp = jiffies;
3350
bdc7f021 3351 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3352 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3353}
3354
5f452431 3355static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3356{
1da177e4 3357 struct inode *inode = data->inode;
14516c3a 3358
9e33bed5 3359 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3360 rpc_restart_call_prepare(task);
788e7a89 3361 return -EAGAIN;
1da177e4 3362 }
9e08a3c5 3363 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3364 return 0;
1da177e4
LT		 3365}
3366
5f452431
FI		 3367static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3368{
3369 if (!nfs4_sequence_done(task, &data->res.seq_res))
3370 return -EAGAIN;
3371 return data->write_done_cb(task, data);
3372}
3373
bdc7f021 3374static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3375{
788e7a89 3376 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3377
3378 if (data->lseg) {
3379 data->args.bitmask = NULL;
3380 data->res.fattr = NULL;
3381 } else
3382 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3383 if (!data->write_done_cb)
3384 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3385 data->res.server = server;
bdc7f021 3386 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3387 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3388}
3389
9bc4e3ca
CL		 3390struct nfs4_renewdata {
3391 struct nfs_client *client;
3392 unsigned long timestamp;
3393};
3394
1da177e4
LT		 3395/*
3396 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3397 * standalone procedure for queueing an asynchronous RENEW.
3398 */
9bc4e3ca 3399static void nfs4_renew_release(void *calldata)
dc96aef9 3400{
9bc4e3ca
CL		 3401 struct nfs4_renewdata *data = calldata;
3402 struct nfs_client *clp = data->client;
dc96aef9 3403
0851de06
AB		 3404 if (atomic_read(&clp->cl_count) > 1)
3405 nfs4_schedule_state_renewal(clp);
3406 nfs_put_client(clp);
9bc4e3ca 3407 kfree(data);
dc96aef9
AB		 3408}
3409
9bc4e3ca 3410static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3411{
9bc4e3ca
CL		 3412 struct nfs4_renewdata *data = calldata;
3413 struct nfs_client *clp = data->client;
3414 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3415
3416 if (task->tk_status < 0) {
95baa25c 3417 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3418 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3419 return;
3420 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3421 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3422 return;
3423 }
3424 nfs4_schedule_path_down_recovery(clp);
1da177e4 3425 }
452e9352 3426 do_renew_lease(clp, timestamp);
1da177e4
LT		 3427}
3428
963d8fe5
TM		 3429static const struct rpc_call_ops nfs4_renew_ops = {
3430 .rpc_call_done = nfs4_renew_done,
dc96aef9 3431 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3432};
3433
2f60ea6b 3434static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3435{
3436 struct rpc_message msg = {
3437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3438 .rpc_argp = clp,
b4454fe1 3439 .rpc_cred = cred,
1da177e4 3440 };
9bc4e3ca 3441 struct nfs4_renewdata *data;
1da177e4 3442
2f60ea6b
TM		 3443 if (renew_flags == 0)
3444 return 0;
0851de06
AB		 3445 if (!atomic_inc_not_zero(&clp->cl_count))
3446 return -EIO;
b569ad34 3447 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3448 if (data == NULL)
3449 return -ENOMEM;
3450 data->client = clp;
3451 data->timestamp = jiffies;
1da177e4 3452 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3453 &nfs4_renew_ops, data);
1da177e4
LT		 3454}
3455
8534d4ec 3456static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3457{
3458 struct rpc_message msg = {
3459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3460 .rpc_argp = clp,
b4454fe1 3461 .rpc_cred = cred,
1da177e4
LT		 3462 };
3463 unsigned long now = jiffies;
3464 int status;
3465
3466 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3467 if (status < 0)
3468 return status;
452e9352 3469 do_renew_lease(clp, now);
1da177e4
LT		 3470 return 0;
3471}
3472
aa1870af
BF		 3473static inline int nfs4_server_supports_acls(struct nfs_server *server)
3474{
3475 return (server->caps & NFS_CAP_ACLS)
3476 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3477 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3478}
3479
3480/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3481 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3482 * the stack.
3483 */
3484#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3485
e9e3d724
NH		 3486static int buf_to_pages_noslab(const void *buf, size_t buflen,
3487 struct page **pages, unsigned int *pgbase)
3488{
3489 struct page *newpage, **spages;
3490 int rc = 0;
3491 size_t len;
3492 spages = pages;
3493
3494 do {
43b7c3f0 3495 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3496 newpage = alloc_page(GFP_KERNEL);
3497
3498 if (newpage == NULL)
3499 goto unwind;
3500 memcpy(page_address(newpage), buf, len);
3501 buf += len;
3502 buflen -= len;
3503 *pages++ = newpage;
3504 rc++;
3505 } while (buflen != 0);
3506
3507 return rc;
3508
3509unwind:
3510 for(; rc > 0; rc--)
3511 __free_page(spages[rc-1]);
3512 return -ENOMEM;
3513}
3514
e50a1c2e
BF		 3515struct nfs4_cached_acl {
3516 int cached;
3517 size_t len;
3e9d4154 3518 char data[0];
e50a1c2e
BF		 3519};
3520
3521static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3522{
3523 struct nfs_inode *nfsi = NFS_I(inode);
3524
3525 spin_lock(&inode->i_lock);
3526 kfree(nfsi->nfs4_acl);
3527 nfsi->nfs4_acl = acl;
3528 spin_unlock(&inode->i_lock);
3529}
3530
3531static void nfs4_zap_acl_attr(struct inode *inode)
3532{
3533 nfs4_set_cached_acl(inode, NULL);
3534}
3535
3536static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3537{
3538 struct nfs_inode *nfsi = NFS_I(inode);
3539 struct nfs4_cached_acl *acl;
3540 int ret = -ENOENT;
3541
3542 spin_lock(&inode->i_lock);
3543 acl = nfsi->nfs4_acl;
3544 if (acl == NULL)
3545 goto out;
3546 if (buf == NULL) /* user is just asking for length */
3547 goto out_len;
3548 if (acl->cached == 0)
3549 goto out;
3550 ret = -ERANGE; /* see getxattr(2) man page */
3551 if (acl->len > buflen)
3552 goto out;
3553 memcpy(buf, acl->data, acl->len);
3554out_len:
3555 ret = acl->len;
3556out:
3557 spin_unlock(&inode->i_lock);
3558 return ret;
3559}
3560
3561static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3562{
3563 struct nfs4_cached_acl *acl;
3564
3565 if (buf && acl_len <= PAGE_SIZE) {
3566 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3567 if (acl == NULL)
3568 goto out;
3569 acl->cached = 1;
3570 memcpy(acl->data, buf, acl_len);
3571 } else {
3572 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3573 if (acl == NULL)
3574 goto out;
3575 acl->cached = 0;
3576 }
3577 acl->len = acl_len;
3578out:
3579 nfs4_set_cached_acl(inode, acl);
3580}
3581
bf118a34
AA		 3582/*
3583 * The getxattr API returns the required buffer length when called with a
3584 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3585 * the required buf. On a NULL buf, we send a page of data to the server
3586 * guessing that the ACL request can be serviced by a page. If so, we cache
3587 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3588 * the cache. If not so, we throw away the page, and cache the required
3589 * length. The next getxattr call will then produce another round trip to
3590 * the server, this time with the input buf of the required size.
3591 */
16b4289c 3592static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3593{
bf118a34 3594 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3595 struct nfs_getaclargs args = {
3596 .fh = NFS_FH(inode),
3597 .acl_pages = pages,
3598 .acl_len = buflen,
3599 };
663c79b3
BH		 3600 struct nfs_getaclres res = {
3601 .acl_len = buflen,
3602 };
e50a1c2e 3603 void *resp_buf;
aa1870af
BF		 3604 struct rpc_message msg = {
3605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3606 .rpc_argp = &args,
663c79b3 3607 .rpc_resp = &res,
aa1870af 3608 };
bf118a34 3609 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3610
bf118a34
AA		 3611 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3612 /* As long as we're doing a round trip to the server anyway,
3613 * let's be prepared for a page of acl data. */
3614 if (npages == 0)
3615 npages = 1;
3616
3617 for (i = 0; i < npages; i++) {
3618 pages[i] = alloc_page(GFP_KERNEL);
3619 if (!pages[i])
3620 goto out_free;
e50a1c2e 3621 }
bf118a34
AA		 3622 if (npages > 1) {
3623 /* for decoding across pages */
331818f1
TM		 3624 res.acl_scratch = alloc_page(GFP_KERNEL);
3625 if (!res.acl_scratch)
bf118a34 3626 goto out_free;
e50a1c2e 3627 }
bf118a34
AA		 3628 args.acl_len = npages * PAGE_SIZE;
3629 args.acl_pgbase = 0;
3630 /* Let decode_getfacl know not to fail if the ACL data is larger than
3631 * the page we send as a guess */
3632 if (buf == NULL)
3633 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3634 resp_buf = page_address(pages[0]);
3635
de040bec 3636 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3637 __func__, buf, buflen, npages, args.acl_len);
3638 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3639 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3640 if (ret)
3641 goto out_free;
bf118a34
AA		 3642
3643 acl_len = res.acl_len - res.acl_data_offset;
3644 if (acl_len > args.acl_len)
3645 nfs4_write_cached_acl(inode, NULL, acl_len);
e50a1c2e 3646 else
bf118a34
AA		 3647 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3648 acl_len);
e50a1c2e
BF		 3649 if (buf) {
3650 ret = -ERANGE;
bf118a34 3651 if (acl_len > buflen)
e50a1c2e 3652 goto out_free;
bf118a34
AA		 3653 _copy_from_pages(buf, pages, res.acl_data_offset,
3654 res.acl_len);
e50a1c2e 3655 }
bf118a34 3656 ret = acl_len;
e50a1c2e 3657out_free:
bf118a34
AA		 3658 for (i = 0; i < npages; i++)
3659 if (pages[i])
3660 __free_page(pages[i]);
331818f1
TM		 3661 if (res.acl_scratch)
3662 __free_page(res.acl_scratch);
aa1870af
BF		 3663 return ret;
3664}
3665
16b4289c
TM		 3666static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3667{
3668 struct nfs4_exception exception = { };
3669 ssize_t ret;
3670 do {
3671 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3672 if (ret >= 0)
3673 break;
3674 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3675 } while (exception.retry);
3676 return ret;
3677}
3678
e50a1c2e
BF		 3679static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3680{
3681 struct nfs_server *server = NFS_SERVER(inode);
3682 int ret;
3683
3684 if (!nfs4_server_supports_acls(server))
3685 return -EOPNOTSUPP;
3686 ret = nfs_revalidate_inode(server, inode);
3687 if (ret < 0)
3688 return ret;
08a22b39
AK		 3689 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3690 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3691 ret = nfs4_read_cached_acl(inode, buf, buflen);
3692 if (ret != -ENOENT)
bf118a34
AA		 3693 /* -ENOENT is returned if there is no ACL or if there is an ACL
3694 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3695 return ret;
3696 return nfs4_get_acl_uncached(inode, buf, buflen);
3697}
3698
16b4289c 3699static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3700{
3701 struct nfs_server *server = NFS_SERVER(inode);
3702 struct page *pages[NFS4ACL_MAXPAGES];
3703 struct nfs_setaclargs arg = {
3704 .fh = NFS_FH(inode),
3705 .acl_pages = pages,
3706 .acl_len = buflen,
3707 };
73c403a9 3708 struct nfs_setaclres res;
4b580ee3
BF		 3709 struct rpc_message msg = {
3710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3711 .rpc_argp = &arg,
73c403a9 3712 .rpc_resp = &res,
4b580ee3 3713 };
e9e3d724 3714 int ret, i;
4b580ee3
BF		 3715
3716 if (!nfs4_server_supports_acls(server))
3717 return -EOPNOTSUPP;
e9e3d724
NH		 3718 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3719 if (i < 0)
3720 return i;
642ac549 3721 nfs_inode_return_delegation(inode);
7c513058 3722 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3723
3724 /*
3725 * Free each page after tx, so the only ref left is
3726 * held by the network stack
3727 */
3728 for (; i > 0; i--)
3729 put_page(pages[i-1]);
3730
08a22b39
AK		 3731 /*
3732 * Acl update can result in inode attribute update.
3733 * so mark the attribute cache invalid.
3734 */
3735 spin_lock(&inode->i_lock);
3736 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3737 spin_unlock(&inode->i_lock);
f41f7418
TM		 3738 nfs_access_zap_cache(inode);
3739 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3740 return ret;
3741}
3742
16b4289c
TM		 3743static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3744{
3745 struct nfs4_exception exception = { };
3746 int err;
3747 do {
3748 err = nfs4_handle_exception(NFS_SERVER(inode),
3749 __nfs4_proc_set_acl(inode, buf, buflen),
3750 &exception);
3751 } while (exception.retry);
3752 return err;
3753}
3754
1da177e4 3755static int
aa5190d0 3756nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3757{
aa5190d0
TM		 3758 struct nfs_client *clp = server->nfs_client;
3759
3760 if (task->tk_status >= 0)
1da177e4
LT		 3761 return 0;
3762 switch(task->tk_status) {
9e33bed5
TM		 3763 case -NFS4ERR_ADMIN_REVOKED:
3764 case -NFS4ERR_BAD_STATEID:
3765 case -NFS4ERR_OPENMODE:
3766 if (state == NULL)
3767 break;
0400a6b0
TM		 3768 nfs4_schedule_stateid_recovery(server, state);
3769 goto wait_on_recovery;
0ced63d1
TM		 3770 case -NFS4ERR_EXPIRED:
3771 if (state != NULL)
3772 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3773 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3774 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3775 nfs4_schedule_lease_recovery(clp);
3776 goto wait_on_recovery;
4745e315
AA		 3777#if defined(CONFIG_NFS_V4_1)
3778 case -NFS4ERR_BADSESSION:
3779 case -NFS4ERR_BADSLOT:
3780 case -NFS4ERR_BAD_HIGH_SLOT:
3781 case -NFS4ERR_DEADSESSION:
3782 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3783 case -NFS4ERR_SEQ_FALSE_RETRY:
3784 case -NFS4ERR_SEQ_MISORDERED:
3785 dprintk("%s ERROR %d, Reset session\n", __func__,
3786 task->tk_status);
0400a6b0 3787 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3788 task->tk_status = 0;
3789 return -EAGAIN;
3790#endif /* CONFIG_NFS_V4_1 */
1da177e4 3791 case -NFS4ERR_DELAY:
aa5190d0 3792 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3793 case -NFS4ERR_GRACE:
2c643488 3794 case -EKEYEXPIRED:
1da177e4
LT		 3795 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3796 task->tk_status = 0;
3797 return -EAGAIN;
a8a4ae3a 3798 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3799 case -NFS4ERR_OLD_STATEID:
3800 task->tk_status = 0;
3801 return -EAGAIN;
3802 }
3803 task->tk_status = nfs4_map_errors(task->tk_status);
3804 return 0;
0400a6b0 3805wait_on_recovery:
a2c0b9e2 3806 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3807 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3808 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3809 task->tk_status = 0;
3810 return -EAGAIN;
1da177e4
LT		 3811}
3812
bb8b27e5
TM		 3813int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3814 unsigned short port, struct rpc_cred *cred,
3815 struct nfs4_setclientid_res *res)
1da177e4
LT		 3816{
3817 nfs4_verifier sc_verifier;
3818 struct nfs4_setclientid setclientid = {
3819 .sc_verifier = &sc_verifier,
3820 .sc_prog = program,
f4eecd5d 3821 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3822 };
3823 struct rpc_message msg = {
3824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3825 .rpc_argp = &setclientid,
bb8b27e5 3826 .rpc_resp = res,
286d7d6a 3827 .rpc_cred = cred,
1da177e4 3828 };
bc4785cd 3829 __be32 *p;
1da177e4
LT		 3830 int loop = 0;
3831 int status;
3832
bc4785cd 3833 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3834 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3835 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3836
3837 for(;;) {
2446ab60 3838 rcu_read_lock();
1da177e4 3839 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3840 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3841 clp->cl_ipaddr,
3842 rpc_peeraddr2str(clp->cl_rpcclient,
3843 RPC_DISPLAY_ADDR),
69dd716c
TM		 3844 rpc_peeraddr2str(clp->cl_rpcclient,
3845 RPC_DISPLAY_PROTO),
78ea323b 3846 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3847 clp->cl_id_uniquifier);
3848 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3849 sizeof(setclientid.sc_netid),
3850 rpc_peeraddr2str(clp->cl_rpcclient,
3851 RPC_DISPLAY_NETID));
1da177e4 3852 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3853 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 3854 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 3855 rcu_read_unlock();
1da177e4 3856
1bd714f2 3857 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3858 if (status != -NFS4ERR_CLID_INUSE)
3859 break;
fd954ae1
TM		 3860 if (loop != 0) {
3861 ++clp->cl_id_uniquifier;
1da177e4 3862 break;
fd954ae1
TM		 3863 }
3864 ++loop;
3865 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3866 }
3867 return status;
3868}
3869
fd954ae1 3870int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3871 struct nfs4_setclientid_res *arg,
3872 struct rpc_cred *cred)
1da177e4
LT		 3873{
3874 struct nfs_fsinfo fsinfo;
3875 struct rpc_message msg = {
3876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3877 .rpc_argp = arg,
1da177e4 3878 .rpc_resp = &fsinfo,
286d7d6a 3879 .rpc_cred = cred,
1da177e4
LT		 3880 };
3881 unsigned long now;
3882 int status;
3883
3884 now = jiffies;
1bd714f2 3885 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3886 if (status == 0) {
3887 spin_lock(&clp->cl_lock);
3888 clp->cl_lease_time = fsinfo.lease_time * HZ;
3889 clp->cl_last_renewal = now;
3890 spin_unlock(&clp->cl_lock);
3891 }
3892 return status;
3893}
3894
fe650407
TM		 3895struct nfs4_delegreturndata {
3896 struct nfs4_delegreturnargs args;
fa178f29 3897 struct nfs4_delegreturnres res;
fe650407
TM		 3898 struct nfs_fh fh;
3899 nfs4_stateid stateid;
26e976a8 3900 unsigned long timestamp;
fa178f29 3901 struct nfs_fattr fattr;
fe650407
TM		 3902 int rpc_status;
3903};
3904
fe650407
TM		 3905static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3906{
3907 struct nfs4_delegreturndata *data = calldata;
938e1010 3908
14516c3a
TM		 3909 if (!nfs4_sequence_done(task, &data->res.seq_res))
3910 return;
938e1010 3911
79708861
RL		 3912 switch (task->tk_status) {
3913 case -NFS4ERR_STALE_STATEID:
3914 case -NFS4ERR_EXPIRED:
3915 case 0:
fa178f29 3916 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3917 break;
3918 default:
3919 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3920 -EAGAIN) {
d00c5d43 3921 rpc_restart_call_prepare(task);
79708861
RL		 3922 return;
3923 }
3924 }
3925 data->rpc_status = task->tk_status;
fe650407
TM		 3926}
3927
3928static void nfs4_delegreturn_release(void *calldata)
3929{
fe650407
TM		 3930 kfree(calldata);
3931}
3932
938e1010
AA		 3933#if defined(CONFIG_NFS_V4_1)
3934static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3935{
3936 struct nfs4_delegreturndata *d_data;
3937
3938 d_data = (struct nfs4_delegreturndata *)data;
3939
035168ab 3940 if (nfs4_setup_sequence(d_data->res.server,
938e1010 3941 &d_data->args.seq_args,
9d12b216 3942 &d_data->res.seq_res, task))
938e1010
AA		 3943 return;
3944 rpc_call_start(task);
3945}
3946#endif /* CONFIG_NFS_V4_1 */
3947
c8d149f3 3948static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3949#if defined(CONFIG_NFS_V4_1)
3950 .rpc_call_prepare = nfs4_delegreturn_prepare,
3951#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3952 .rpc_call_done = nfs4_delegreturn_done,
3953 .rpc_release = nfs4_delegreturn_release,
3954};
3955
e6f81075 3956static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3957{
3958 struct nfs4_delegreturndata *data;
fa178f29 3959 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3960 struct rpc_task *task;
5138fde0
TM		 3961 struct rpc_message msg = {
3962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3963 .rpc_cred = cred,
3964 };
c970aa85
TM		 3965 struct rpc_task_setup task_setup_data = {
3966 .rpc_client = server->client,
5138fde0 3967 .rpc_message = &msg,
c970aa85
TM		 3968 .callback_ops = &nfs4_delegreturn_ops,
3969 .flags = RPC_TASK_ASYNC,
3970 };
e6f81075 3971 int status = 0;
fe650407 3972
8535b2be 3973 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3974 if (data == NULL)
3975 return -ENOMEM;
9d12b216 3976 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 3977 data->args.fhandle = &data->fh;
3978 data->args.stateid = &data->stateid;
fa178f29 3979 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3980 nfs_copy_fh(&data->fh, NFS_FH(inode));
3981 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3982 data->res.fattr = &data->fattr;
3983 data->res.server = server;
5138fde0 3984 nfs_fattr_init(data->res.fattr);
26e976a8 3985 data->timestamp = jiffies;
fe650407
TM		 3986 data->rpc_status = 0;
3987
c970aa85 3988 task_setup_data.callback_data = data;
1174dd1f
TM		 3989 msg.rpc_argp = &data->args;
3990 msg.rpc_resp = &data->res;
c970aa85 3991 task = rpc_run_task(&task_setup_data);
7a1218a2 3992 if (IS_ERR(task))
fe650407 3993 return PTR_ERR(task);
e6f81075
TM		 3994 if (!issync)
3995 goto out;
fe650407 3996 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3997 if (status != 0)
3998 goto out;
3999 status = data->rpc_status;
4000 if (status != 0)
4001 goto out;
4002 nfs_refresh_inode(inode, &data->fattr);
4003out:
e6b3c4db 4004 rpc_put_task(task);
fe650407 4005 return status;
1da177e4
LT		 4006}
4007
e6f81075 4008int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4009{
4010 struct nfs_server *server = NFS_SERVER(inode);
4011 struct nfs4_exception exception = { };
4012 int err;
4013 do {
e6f81075 4014 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4015 switch (err) {
4016 case -NFS4ERR_STALE_STATEID:
4017 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4018 case 0:
4019 return 0;
4020 }
4021 err = nfs4_handle_exception(server, err, &exception);
4022 } while (exception.retry);
4023 return err;
4024}
4025
4026#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4027#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4028
4029/*
4030 * sleep, with exponential backoff, and retry the LOCK operation.
4031 */
4032static unsigned long
4033nfs4_set_lock_task_retry(unsigned long timeout)
4034{
d310310c 4035 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4036 timeout <<= 1;
4037 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4038 return NFS4_LOCK_MAXTIMEOUT;
4039 return timeout;
4040}
4041
1da177e4
LT		 4042static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4043{
4044 struct inode *inode = state->inode;
4045 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4046 struct nfs_client *clp = server->nfs_client;
911d1aaf 4047 struct nfs_lockt_args arg = {
1da177e4 4048 .fh = NFS_FH(inode),
911d1aaf 4049 .fl = request,
1da177e4 4050 };
911d1aaf
TM		 4051 struct nfs_lockt_res res = {
4052 .denied = request,
1da177e4
LT		 4053 };
4054 struct rpc_message msg = {
4055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4056 .rpc_argp = &arg,
4057 .rpc_resp = &res,
4058 .rpc_cred = state->owner->so_cred,
4059 };
1da177e4
LT		 4060 struct nfs4_lock_state *lsp;
4061 int status;
4062
911d1aaf 4063 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4064 status = nfs4_set_lock_state(state, request);
4065 if (status != 0)
4066 goto out;
4067 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4068 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4069 arg.lock_owner.s_dev = server->s_dev;
7c513058 4070 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4071 switch (status) {
4072 case 0:
4073 request->fl_type = F_UNLCK;
4074 break;
4075 case -NFS4ERR_DENIED:
4076 status = 0;
1da177e4 4077 }
70cc6487 4078 request->fl_ops->fl_release_private(request);
8d0a8a9d 4079out:
1da177e4
LT		 4080 return status;
4081}
4082
4083static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4084{
4085 struct nfs4_exception exception = { };
4086 int err;
4087
4088 do {
4089 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4090 _nfs4_proc_getlk(state, cmd, request),
4091 &exception);
4092 } while (exception.retry);
4093 return err;
4094}
4095
4096static int do_vfs_lock(struct file *file, struct file_lock *fl)
4097{
4098 int res = 0;
4099 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4100 case FL_POSIX:
4101 res = posix_lock_file_wait(file, fl);
4102 break;
4103 case FL_FLOCK:
4104 res = flock_lock_file_wait(file, fl);
4105 break;
4106 default:
4107 BUG();
4108 }
1da177e4
LT		 4109 return res;
4110}
4111
faf5f49c 4112struct nfs4_unlockdata {
911d1aaf
TM		 4113 struct nfs_locku_args arg;
4114 struct nfs_locku_res res;
faf5f49c
TM		 4115 struct nfs4_lock_state *lsp;
4116 struct nfs_open_context *ctx;
911d1aaf
TM		 4117 struct file_lock fl;
4118 const struct nfs_server *server;
26e976a8 4119 unsigned long timestamp;
faf5f49c
TM		 4120};
4121
911d1aaf
TM		 4122static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4123 struct nfs_open_context *ctx,
4124 struct nfs4_lock_state *lsp,
4125 struct nfs_seqid *seqid)
4126{
4127 struct nfs4_unlockdata *p;
4128 struct inode *inode = lsp->ls_state->inode;
4129
8535b2be 4130 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4131 if (p == NULL)
4132 return NULL;
4133 p->arg.fh = NFS_FH(inode);
4134 p->arg.fl = &p->fl;
4135 p->arg.seqid = seqid;
c1d51931 4136 p->res.seqid = seqid;
911d1aaf
TM		 4137 p->arg.stateid = &lsp->ls_stateid;
4138 p->lsp = lsp;
4139 atomic_inc(&lsp->ls_count);
4140 /* Ensure we don't close file until we're done freeing locks! */
4141 p->ctx = get_nfs_open_context(ctx);
4142 memcpy(&p->fl, fl, sizeof(p->fl));
4143 p->server = NFS_SERVER(inode);
4144 return p;
4145}
4146
06f814a3 4147static void nfs4_locku_release_calldata(void *data)
faf5f49c 4148{
963d8fe5 4149 struct nfs4_unlockdata *calldata = data;
911d1aaf 4150 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4151 nfs4_put_lock_state(calldata->lsp);
4152 put_nfs_open_context(calldata->ctx);
4153 kfree(calldata);
faf5f49c
TM		 4154}
4155
963d8fe5 4156static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4157{
963d8fe5 4158 struct nfs4_unlockdata *calldata = data;
faf5f49c 4159
14516c3a
TM		 4160 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4161 return;
faf5f49c
TM		 4162 switch (task->tk_status) {
4163 case 0:
4164 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4165 calldata->res.stateid.data,
faf5f49c 4166 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4167 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4168 break;
9e33bed5
TM		 4169 case -NFS4ERR_BAD_STATEID:
4170 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4171 case -NFS4ERR_STALE_STATEID:
4172 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4173 break;
4174 default:
9e33bed5 4175 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4176 rpc_restart_call_prepare(task);
faf5f49c 4177 }
faf5f49c
TM		 4178}
4179
4ce70ada 4180static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4181{
4ce70ada 4182 struct nfs4_unlockdata *calldata = data;
faf5f49c 4183
911d1aaf 4184 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4185 return;
4186 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4187 /* Note: exit _without_ running nfs4_locku_done */
4188 task->tk_action = NULL;
faf5f49c
TM		 4189 return;
4190 }
26e976a8 4191 calldata->timestamp = jiffies;
035168ab 4192 if (nfs4_setup_sequence(calldata->server,
a893693c 4193 &calldata->arg.seq_args,
9d12b216 4194 &calldata->res.seq_res, task))
a893693c 4195 return;
5138fde0 4196 rpc_call_start(task);
faf5f49c
TM		 4197}
4198
963d8fe5 4199static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4200 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4201 .rpc_call_done = nfs4_locku_done,
06f814a3 4202 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4203};
4204
a5d16a4d
TM		 4205static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4206 struct nfs_open_context *ctx,
4207 struct nfs4_lock_state *lsp,
4208 struct nfs_seqid *seqid)
4209{
4210 struct nfs4_unlockdata *data;
5138fde0
TM		 4211 struct rpc_message msg = {
4212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4213 .rpc_cred = ctx->cred,
4214 };
c970aa85
TM		 4215 struct rpc_task_setup task_setup_data = {
4216 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4217 .rpc_message = &msg,
c970aa85 4218 .callback_ops = &nfs4_locku_ops,
101070ca 4219 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4220 .flags = RPC_TASK_ASYNC,
4221 };
a5d16a4d 4222
137d6aca
FF		 4223 /* Ensure this is an unlock - when canceling a lock, the
4224 * canceled lock is passed in, and it won't be an unlock.
4225 */
4226 fl->fl_type = F_UNLCK;
4227
a5d16a4d
TM		 4228 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4229 if (data == NULL) {
4230 nfs_free_seqid(seqid);
4231 return ERR_PTR(-ENOMEM);
4232 }
4233
9d12b216 4234 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4235 msg.rpc_argp = &data->arg;
4236 msg.rpc_resp = &data->res;
c970aa85
TM		 4237 task_setup_data.callback_data = data;
4238 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4239}
4240
faf5f49c
TM		 4241static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4242{
19e03c57 4243 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4244 struct nfs_seqid *seqid;
1da177e4 4245 struct nfs4_lock_state *lsp;
06f814a3
TM		 4246 struct rpc_task *task;
4247 int status = 0;
536ff0f8 4248 unsigned char fl_flags = request->fl_flags;
faf5f49c 4249
8d0a8a9d 4250 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4251 /* Unlock _before_ we do the RPC call */
4252 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4253 down_read(&nfsi->rwsem);
4254 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4255 up_read(&nfsi->rwsem);
9b073574 4256 goto out;
19e03c57
TM		 4257 }
4258 up_read(&nfsi->rwsem);
8d0a8a9d 4259 if (status != 0)
9b073574
TM		 4260 goto out;
4261 /* Is this a delegated lock? */
4262 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4263 goto out;
8d0a8a9d 4264 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4265 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4266 status = -ENOMEM;
911d1aaf 4267 if (seqid == NULL)
9b073574 4268 goto out;
cd3758e3 4269 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4270 status = PTR_ERR(task);
4271 if (IS_ERR(task))
9b073574 4272 goto out;
a5d16a4d 4273 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4274 rpc_put_task(task);
9b073574 4275out:
536ff0f8 4276 request->fl_flags = fl_flags;
1da177e4
LT		 4277 return status;
4278}
4279
a5d16a4d
TM		 4280struct nfs4_lockdata {
4281 struct nfs_lock_args arg;
4282 struct nfs_lock_res res;
4283 struct nfs4_lock_state *lsp;
4284 struct nfs_open_context *ctx;
4285 struct file_lock fl;
26e976a8 4286 unsigned long timestamp;
a5d16a4d
TM		 4287 int rpc_status;
4288 int cancelled;
66179efe 4289 struct nfs_server *server;
a5d16a4d
TM		 4290};
4291
4292static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4293 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4294 gfp_t gfp_mask)
1da177e4 4295{
a5d16a4d
TM		 4296 struct nfs4_lockdata *p;
4297 struct inode *inode = lsp->ls_state->inode;
1da177e4 4298 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4299
8535b2be 4300 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4301 if (p == NULL)
4302 return NULL;
4303
4304 p->arg.fh = NFS_FH(inode);
4305 p->arg.fl = &p->fl;
8535b2be 4306 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4307 if (p->arg.open_seqid == NULL)
4308 goto out_free;
8535b2be 4309 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4310 if (p->arg.lock_seqid == NULL)
2f74c0a0 4311 goto out_free_seqid;
a5d16a4d 4312 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4313 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4314 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4315 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4316 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4317 p->lsp = lsp;
66179efe 4318 p->server = server;
a5d16a4d
TM		 4319 atomic_inc(&lsp->ls_count);
4320 p->ctx = get_nfs_open_context(ctx);
4321 memcpy(&p->fl, fl, sizeof(p->fl));
4322 return p;
2f74c0a0
TM		 4323out_free_seqid:
4324 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4325out_free:
4326 kfree(p);
4327 return NULL;
4328}
4329
4330static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4331{
4332 struct nfs4_lockdata *data = calldata;
4333 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4334
3110ff80 4335 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4336 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4337 return;
a5d16a4d
TM		 4338 /* Do we need to do an open_to_lock_owner? */
4339 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4340 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4341 return;
a5d16a4d
TM		 4342 data->arg.open_stateid = &state->stateid;
4343 data->arg.new_lock_owner = 1;
c1d51931 4344 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4345 } else
4346 data->arg.new_lock_owner = 0;
26e976a8 4347 data->timestamp = jiffies;
035168ab
TM		 4348 if (nfs4_setup_sequence(data->server,
4349 &data->arg.seq_args,
9d12b216 4350 &data->res.seq_res, task))
66179efe 4351 return;
5138fde0 4352 rpc_call_start(task);
3110ff80 4353 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4354}
4355
b257957e
AB		 4356static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4357{
4358 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4359 nfs4_lock_prepare(task, calldata);
4360}
4361
a5d16a4d
TM		 4362static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4363{
4364 struct nfs4_lockdata *data = calldata;
4365
3110ff80 4366 dprintk("%s: begin!\n", __func__);
a5d16a4d 4367
14516c3a
TM		 4368 if (!nfs4_sequence_done(task, &data->res.seq_res))
4369 return;
66179efe 4370
a5d16a4d 4371 data->rpc_status = task->tk_status;
a5d16a4d 4372 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4373 if (data->rpc_status == 0)
4374 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4375 else
4376 goto out;
4377 }
4378 if (data->rpc_status == 0) {
4379 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4380 sizeof(data->lsp->ls_stateid.data));
4381 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4382 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4383 }
a5d16a4d 4384out:
3110ff80 4385 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4386}
4387
4388static void nfs4_lock_release(void *calldata)
4389{
4390 struct nfs4_lockdata *data = calldata;
4391
3110ff80 4392 dprintk("%s: begin!\n", __func__);
2f74c0a0 4393 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4394 if (data->cancelled != 0) {
4395 struct rpc_task *task;
4396 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4397 data->arg.lock_seqid);
4398 if (!IS_ERR(task))
bf294b41 4399 rpc_put_task_async(task);
3110ff80 4400 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4401 } else
4402 nfs_free_seqid(data->arg.lock_seqid);
4403 nfs4_put_lock_state(data->lsp);
4404 put_nfs_open_context(data->ctx);
4405 kfree(data);
3110ff80 4406 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4407}
4408
4409static const struct rpc_call_ops nfs4_lock_ops = {
4410 .rpc_call_prepare = nfs4_lock_prepare,
4411 .rpc_call_done = nfs4_lock_done,
4412 .rpc_release = nfs4_lock_release,
4413};
4414
b257957e
AB		 4415static const struct rpc_call_ops nfs4_recover_lock_ops = {
4416 .rpc_call_prepare = nfs4_recover_lock_prepare,
4417 .rpc_call_done = nfs4_lock_done,
4418 .rpc_release = nfs4_lock_release,
4419};
4420
2bee72a6
TM		 4421static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4422{
2bee72a6
TM		 4423 switch (error) {
4424 case -NFS4ERR_ADMIN_REVOKED:
4425 case -NFS4ERR_BAD_STATEID:
ecac799a 4426 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4427 if (new_lock_owner != 0 ||
4428 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4429 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4430 break;
4431 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4432 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4433 case -NFS4ERR_EXPIRED:
4434 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4435 };
4436}
4437
afe6c27c 4438static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4439{
4440 struct nfs4_lockdata *data;
4441 struct rpc_task *task;
5138fde0
TM		 4442 struct rpc_message msg = {
4443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4444 .rpc_cred = state->owner->so_cred,
4445 };
c970aa85
TM		 4446 struct rpc_task_setup task_setup_data = {
4447 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4448 .rpc_message = &msg,
c970aa85 4449 .callback_ops = &nfs4_lock_ops,
101070ca 4450 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4451 .flags = RPC_TASK_ASYNC,
4452 };
a5d16a4d
TM		 4453 int ret;
4454
3110ff80 4455 dprintk("%s: begin!\n", __func__);
cd3758e3 4456 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4457 fl->fl_u.nfs4_fl.owner,
4458 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4459 if (data == NULL)
4460 return -ENOMEM;
4461 if (IS_SETLKW(cmd))
4462 data->arg.block = 1;
b257957e
AB		 4463 if (recovery_type > NFS_LOCK_NEW) {
4464 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4465 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4466 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4467 }
9d12b216 4468 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4469 msg.rpc_argp = &data->arg;
4470 msg.rpc_resp = &data->res;
c970aa85
TM		 4471 task_setup_data.callback_data = data;
4472 task = rpc_run_task(&task_setup_data);
7a1218a2 4473 if (IS_ERR(task))
a5d16a4d 4474 return PTR_ERR(task);
a5d16a4d
TM		 4475 ret = nfs4_wait_for_completion_rpc_task(task);
4476 if (ret == 0) {
4477 ret = data->rpc_status;
2bee72a6
TM		 4478 if (ret)
4479 nfs4_handle_setlk_error(data->server, data->lsp,
4480 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4481 } else
4482 data->cancelled = 1;
e6b3c4db 4483 rpc_put_task(task);
3110ff80 4484 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4485 return ret;
1da177e4
LT		 4486}
4487
4488static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4489{
202b50dc
TM		 4490 struct nfs_server *server = NFS_SERVER(state->inode);
4491 struct nfs4_exception exception = { };
4492 int err;
4493
4494 do {
42a2d13e
TM		 4495 /* Cache the lock if possible... */
4496 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4497 return 0;
afe6c27c 4498 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4499 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4500 break;
4501 nfs4_handle_exception(server, err, &exception);
4502 } while (exception.retry);
4503 return err;
1da177e4
LT		 4504}
4505
4506static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4507{
202b50dc
TM		 4508 struct nfs_server *server = NFS_SERVER(state->inode);
4509 struct nfs4_exception exception = { };
4510 int err;
4511
6bfc93ef
TM		 4512 err = nfs4_set_lock_state(state, request);
4513 if (err != 0)
4514 return err;
202b50dc 4515 do {
42a2d13e
TM		 4516 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4517 return 0;
afe6c27c 4518 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4519 switch (err) {
4520 default:
4521 goto out;
4522 case -NFS4ERR_GRACE:
4523 case -NFS4ERR_DELAY:
4524 nfs4_handle_exception(server, err, &exception);
4525 err = 0;
4526 }
202b50dc 4527 } while (exception.retry);
a9ed2e25 4528out:
202b50dc 4529 return err;
1da177e4
LT		 4530}
4531
f062eb6c 4532#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4533static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4534{
b01dd1d8
BS		 4535 int status, ret = NFS_OK;
4536 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4537 struct nfs_server *server = NFS_SERVER(state->inode);
4538
b01dd1d8
BS		 4539 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4540 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4541 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4542 if (status != NFS_OK) {
4543 nfs41_free_stateid(server, &lsp->ls_stateid);
4544 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4545 ret = status;
4546 }
4547 }
4548 };
4549
4550 return ret;
4551}
4552
4553static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4554{
4555 int status = NFS_OK;
4556
4557 if (test_bit(LK_STATE_IN_USE, &state->flags))
4558 status = nfs41_check_expired_locks(state);
f062eb6c 4559 if (status == NFS_OK)
b01dd1d8 4560 return status;
f062eb6c
BS		 4561 return nfs4_lock_expired(state, request);
4562}
4563#endif
4564
1da177e4
LT		 4565static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4566{
19e03c57 4567 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4568 unsigned char fl_flags = request->fl_flags;
8e469ebd 4569 int status = -ENOLCK;
1da177e4 4570
8e469ebd
TM		 4571 if ((fl_flags & FL_POSIX) &&
4572 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4573 goto out;
6bfc93ef 4574 /* Is this a delegated open? */
6bfc93ef
TM		 4575 status = nfs4_set_lock_state(state, request);
4576 if (status != 0)
4577 goto out;
01c3b861
TM		 4578 request->fl_flags |= FL_ACCESS;
4579 status = do_vfs_lock(request->fl_file, request);
4580 if (status < 0)
4581 goto out;
19e03c57 4582 down_read(&nfsi->rwsem);
01c3b861 4583 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4584 /* Yes: cache locks! */
01c3b861 4585 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4586 request->fl_flags = fl_flags & ~FL_SLEEP;
4587 status = do_vfs_lock(request->fl_file, request);
4588 goto out_unlock;
01c3b861 4589 }
afe6c27c 4590 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4591 if (status != 0)
01c3b861 4592 goto out_unlock;
6bfc93ef 4593 /* Note: we always want to sleep here! */
01c3b861 4594 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4595 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4596 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4597 "manager!\n", __func__);
01c3b861 4598out_unlock:
19e03c57 4599 up_read(&nfsi->rwsem);
01c3b861
TM		 4600out:
4601 request->fl_flags = fl_flags;
1da177e4
LT		 4602 return status;
4603}
4604
4605static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4606{
4607 struct nfs4_exception exception = { };
4608 int err;
4609
4610 do {
965b5d67
TM		 4611 err = _nfs4_proc_setlk(state, cmd, request);
4612 if (err == -NFS4ERR_DENIED)
4613 err = -EAGAIN;
1da177e4 4614 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4615 err, &exception);
1da177e4
LT		 4616 } while (exception.retry);
4617 return err;
4618}
4619
4620static int
4621nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4622{
4623 struct nfs_open_context *ctx;
4624 struct nfs4_state *state;
4625 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4626 int status;
4627
4628 /* verify open state */
cd3758e3 4629 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4630 state = ctx->state;
4631
4632 if (request->fl_start < 0 || request->fl_end < 0)
4633 return -EINVAL;
4634
d953126a
TM		 4635 if (IS_GETLK(cmd)) {
4636 if (state != NULL)
4637 return nfs4_proc_getlk(state, F_GETLK, request);
4638 return 0;
4639 }
1da177e4
LT		 4640
4641 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4642 return -EINVAL;
4643
d953126a
TM		 4644 if (request->fl_type == F_UNLCK) {
4645 if (state != NULL)
4646 return nfs4_proc_unlck(state, cmd, request);
4647 return 0;
4648 }
1da177e4 4649
d953126a
TM		 4650 if (state == NULL)
4651 return -ENOLCK;
1da177e4
LT		 4652 do {
4653 status = nfs4_proc_setlk(state, cmd, request);
4654 if ((status != -EAGAIN) || IS_SETLK(cmd))
4655 break;
4656 timeout = nfs4_set_lock_task_retry(timeout);
4657 status = -ERESTARTSYS;
4658 if (signalled())
4659 break;
4660 } while(status < 0);
1da177e4
LT		 4661 return status;
4662}
4663
888e694c
TM		 4664int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4665{
4666 struct nfs_server *server = NFS_SERVER(state->inode);
4667 struct nfs4_exception exception = { };
4668 int err;
4669
4670 err = nfs4_set_lock_state(state, fl);
4671 if (err != 0)
4672 goto out;
4673 do {
afe6c27c 4674 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4675 switch (err) {
4676 default:
a030889a
WAA		 4677 printk(KERN_ERR "NFS: %s: unhandled error "
4678 "%d.\n", __func__, err);
d5122201 4679 case 0:
965b5d67 4680 case -ESTALE:
d5122201
TM		 4681 goto out;
4682 case -NFS4ERR_EXPIRED:
0ced63d1 4683 nfs4_schedule_stateid_recovery(server, state);
d5122201 4684 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4685 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4686 nfs4_schedule_lease_recovery(server->nfs_client);
4687 goto out;
74e7bb73
RL		 4688 case -NFS4ERR_BADSESSION:
4689 case -NFS4ERR_BADSLOT:
4690 case -NFS4ERR_BAD_HIGH_SLOT:
4691 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4692 case -NFS4ERR_DEADSESSION:
0400a6b0 4693 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4694 goto out;
965b5d67
TM		 4695 case -ERESTARTSYS:
4696 /*
4697 * The show must go on: exit, but mark the
4698 * stateid as needing recovery.
4699 */
4700 case -NFS4ERR_ADMIN_REVOKED:
4701 case -NFS4ERR_BAD_STATEID:
4702 case -NFS4ERR_OPENMODE:
0400a6b0 4703 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4704 err = 0;
4705 goto out;
168667c4
TM		 4706 case -EKEYEXPIRED:
4707 /*
4708 * User RPCSEC_GSS context has expired.
4709 * We cannot recover this stateid now, so
4710 * skip it and allow recovery thread to
4711 * proceed.
4712 */
4713 err = 0;
4714 goto out;
965b5d67
TM		 4715 case -ENOMEM:
4716 case -NFS4ERR_DENIED:
4717 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4718 err = 0;
4719 goto out;
d5122201
TM		 4720 case -NFS4ERR_DELAY:
4721 break;
4722 }
888e694c
TM		 4723 err = nfs4_handle_exception(server, err, &exception);
4724 } while (exception.retry);
4725out:
4726 return err;
4727}
6b3b5496 4728
d3c7b7cc
TM		 4729static void nfs4_release_lockowner_release(void *calldata)
4730{
4731 kfree(calldata);
4732}
4733
4734const struct rpc_call_ops nfs4_release_lockowner_ops = {
4735 .rpc_release = nfs4_release_lockowner_release,
4736};
4737
4738void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4739{
4740 struct nfs_server *server = lsp->ls_state->owner->so_server;
4741 struct nfs_release_lockowner_args *args;
4742 struct rpc_message msg = {
4743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4744 };
4745
4746 if (server->nfs_client->cl_mvops->minor_version != 0)
4747 return;
4748 args = kmalloc(sizeof(*args), GFP_NOFS);
4749 if (!args)
4750 return;
4751 args->lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4752 args->lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4753 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4754 msg.rpc_argp = args;
4755 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4756}
4757
aa1870af
BF		 4758#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4759
64c2ce8b
AK		 4760static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4761 const void *buf, size_t buflen,
4762 int flags, int type)
6b3b5496 4763{
64c2ce8b
AK		 4764 if (strcmp(key, "") != 0)
4765 return -EINVAL;
4b580ee3 4766
64c2ce8b 4767 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4768}
4769
64c2ce8b
AK		 4770static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4771 void *buf, size_t buflen, int type)
6b3b5496 4772{
64c2ce8b
AK		 4773 if (strcmp(key, "") != 0)
4774 return -EINVAL;
aa1870af 4775
64c2ce8b 4776 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4777}
4778
64c2ce8b
AK		 4779static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4780 size_t list_len, const char *name,
4781 size_t name_len, int type)
6b3b5496 4782{
64c2ce8b 4783 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4784
096455a2
BF		 4785 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4786 return 0;
64c2ce8b
AK		 4787
4788 if (list && len <= list_len)
4789 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4790 return len;
6b3b5496
BF		 4791}
4792
533eb461
AA		 4793/*
4794 * nfs_fhget will use either the mounted_on_fileid or the fileid
4795 */
69aaaae1
TM		 4796static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4797{
533eb461
AA		 4798 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4799 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4800 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4801 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4802 return;
4803
4804 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4805 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4806 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4807 fattr->nlink = 2;
4808}
4809
56659e99 4810int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4811 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4812{
4813 struct nfs_server *server = NFS_SERVER(dir);
4814 u32 bitmask[2] = {
361e624f 4815 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4816 };
4817 struct nfs4_fs_locations_arg args = {
4818 .dir_fh = NFS_FH(dir),
c228fd3a 4819 .name = name,
683b57b4
TM		 4820 .page = page,
4821 .bitmask = bitmask,
4822 };
22958463
BH		 4823 struct nfs4_fs_locations_res res = {
4824 .fs_locations = fs_locations,
4825 };
683b57b4
TM		 4826 struct rpc_message msg = {
4827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4828 .rpc_argp = &args,
22958463 4829 .rpc_resp = &res,
683b57b4
TM		 4830 };
4831 int status;
4832
3110ff80 4833 dprintk("%s: start\n", __func__);
533eb461
AA		 4834
4835 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4836 * is not supported */
4837 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4838 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4839 else
4840 bitmask[0] |= FATTR4_WORD0_FILEID;
4841
c228fd3a 4842 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4843 fs_locations->server = server;
830b8e33 4844 fs_locations->nlocations = 0;
7c513058 4845 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4846 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4847 return status;
4848}
4849
5a5ea0d4
BS		 4850static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4851{
4852 int status;
4853 struct nfs4_secinfo_arg args = {
4854 .dir_fh = NFS_FH(dir),
4855 .name = name,
4856 };
4857 struct nfs4_secinfo_res res = {
4858 .flavors = flavors,
4859 };
4860 struct rpc_message msg = {
4861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4862 .rpc_argp = &args,
4863 .rpc_resp = &res,
4864 };
4865
4866 dprintk("NFS call secinfo %s\n", name->name);
4867 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4868 dprintk("NFS reply secinfo: %d\n", status);
4869 return status;
4870}
4871
4872int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4873{
4874 struct nfs4_exception exception = { };
4875 int err;
4876 do {
4877 err = nfs4_handle_exception(NFS_SERVER(dir),
4878 _nfs4_proc_secinfo(dir, name, flavors),
4879 &exception);
4880 } while (exception.retry);
4881 return err;
4882}
4883
557134a3 4884#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4885/*
4886 * Check the exchange flags returned by the server for invalid flags, having
4887 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4888 * DS flags set.
4889 */
4890static int nfs4_check_cl_exchange_flags(u32 flags)
4891{
4892 if (flags & ~EXCHGID4_FLAG_MASK_R)
4893 goto out_inval;
4894 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4895 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4896 goto out_inval;
4897 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4898 goto out_inval;
4899 return NFS_OK;
4900out_inval:
4901 return -NFS4ERR_INVAL;
4902}
4903
78fe0f41
WAA		 4904static bool
4905nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4906{
4907 if (a->server_scope_sz == b->server_scope_sz &&
4908 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4909 return true;
4910
4911 return false;
4912}
4913
99fe60d0
BH		 4914/*
4915 * nfs4_proc_exchange_id()
4916 *
4917 * Since the clientid has expired, all compounds using sessions
4918 * associated with the stale clientid will be returning
4919 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4920 * be in some phase of session reset.
4921 */
4d643d1d 4922int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4923{
4924 nfs4_verifier verifier;
4925 struct nfs41_exchange_id_args args = {
4926 .client = clp,
357f54d6 4927 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4928 };
4929 struct nfs41_exchange_id_res res = {
4930 .client = clp,
4931 };
4932 int status;
4933 struct rpc_message msg = {
4934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4935 .rpc_argp = &args,
4936 .rpc_resp = &res,
4937 .rpc_cred = cred,
4938 };
4939 __be32 *p;
4940
4941 dprintk("--> %s\n", __func__);
4942 BUG_ON(clp == NULL);
a7b72103 4943
99fe60d0
BH		 4944 p = (u32 *)verifier.data;
4945 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4946 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4947 args.verifier = &verifier;
4948
c7a360b0
AA		 4949 args.id_len = scnprintf(args.id, sizeof(args.id),
4950 "%s/%s.%s/%u",
4951 clp->cl_ipaddr,
4952 init_utsname()->nodename,
4953 init_utsname()->domainname,
4954 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4955
78fe0f41 4956 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
9edbd953
WAA		 4957 if (unlikely(!res.server_scope)) {
4958 status = -ENOMEM;
4959 goto out;
4960 }
78fe0f41 4961
7d2ed9ac
WAA		 4962 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4963 if (unlikely(!res.impl_id)) {
4964 status = -ENOMEM;
4965 goto out_server_scope;
4966 }
4967
1bd714f2 4968 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4969 if (!status)
4970 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41 4971
7d2ed9ac
WAA		 4972 if (!status) {
4973 /* use the most recent implementation id */
4974 kfree(clp->impl_id);
4975 clp->impl_id = res.impl_id;
4976 } else
4977 kfree(res.impl_id);
4978
78fe0f41
WAA		 4979 if (!status) {
4980 if (clp->server_scope &&
4981 !nfs41_same_server_scope(clp->server_scope,
4982 res.server_scope)) {
4983 dprintk("%s: server_scope mismatch detected\n",
4984 __func__);
4985 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4986 kfree(clp->server_scope);
4987 clp->server_scope = NULL;
4988 }
4989
9edbd953 4990 if (!clp->server_scope) {
78fe0f41 4991 clp->server_scope = res.server_scope;
9edbd953
WAA		 4992 goto out;
4993 }
78fe0f41 4994 }
7d2ed9ac
WAA		 4995
4996out_server_scope:
9edbd953
WAA		 4997 kfree(res.server_scope);
4998out:
7d2ed9ac
WAA		 4999 if (clp->impl_id)
5000 dprintk("%s: Server Implementation ID: "
5001 "domain: %s, name: %s, date: %llu,%u\n",
5002 __func__, clp->impl_id->domain, clp->impl_id->name,
5003 clp->impl_id->date.seconds,
5004 clp->impl_id->date.nseconds);
99fe60d0
BH		 5005 dprintk("<-- %s status= %d\n", __func__, status);
5006 return status;
5007}
5008
2050f0cc
AA		 5009struct nfs4_get_lease_time_data {
5010 struct nfs4_get_lease_time_args *args;
5011 struct nfs4_get_lease_time_res *res;
5012 struct nfs_client *clp;
5013};
5014
5015static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5016 void *calldata)
5017{
5018 int ret;
5019 struct nfs4_get_lease_time_data *data =
5020 (struct nfs4_get_lease_time_data *)calldata;
5021
5022 dprintk("--> %s\n", __func__);
689cf5c1 5023 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5024 /* just setup sequence, do not trigger session recovery
5025 since we're invoked within one */
5026 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5027 &data->args->la_seq_args,
9d12b216 5028 &data->res->lr_seq_res, task);
2050f0cc
AA		 5029
5030 BUG_ON(ret == -EAGAIN);
5031 rpc_call_start(task);
5032 dprintk("<-- %s\n", __func__);
5033}
5034
5035/*
5036 * Called from nfs4_state_manager thread for session setup, so don't recover
5037 * from sequence operation or clientid errors.
5038 */
5039static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5040{
5041 struct nfs4_get_lease_time_data *data =
5042 (struct nfs4_get_lease_time_data *)calldata;
5043
5044 dprintk("--> %s\n", __func__);
14516c3a
TM		 5045 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5046 return;
2050f0cc
AA		 5047 switch (task->tk_status) {
5048 case -NFS4ERR_DELAY:
5049 case -NFS4ERR_GRACE:
5050 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5051 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5052 task->tk_status = 0;
a8a4ae3a
AA		 5053 /* fall through */
5054 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5055 rpc_restart_call_prepare(task);
2050f0cc
AA		 5056 return;
5057 }
2050f0cc
AA		 5058 dprintk("<-- %s\n", __func__);
5059}
5060
5061struct rpc_call_ops nfs4_get_lease_time_ops = {
5062 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5063 .rpc_call_done = nfs4_get_lease_time_done,
5064};
5065
5066int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5067{
5068 struct rpc_task *task;
5069 struct nfs4_get_lease_time_args args;
5070 struct nfs4_get_lease_time_res res = {
5071 .lr_fsinfo = fsinfo,
5072 };
5073 struct nfs4_get_lease_time_data data = {
5074 .args = &args,
5075 .res = &res,
5076 .clp = clp,
5077 };
5078 struct rpc_message msg = {
5079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5080 .rpc_argp = &args,
5081 .rpc_resp = &res,
5082 };
5083 struct rpc_task_setup task_setup = {
5084 .rpc_client = clp->cl_rpcclient,
5085 .rpc_message = &msg,
5086 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5087 .callback_data = &data,
5088 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5089 };
5090 int status;
5091
9d12b216 5092 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5093 dprintk("--> %s\n", __func__);
5094 task = rpc_run_task(&task_setup);
5095
5096 if (IS_ERR(task))
5097 status = PTR_ERR(task);
5098 else {
5099 status = task->tk_status;
5100 rpc_put_task(task);
5101 }
5102 dprintk("<-- %s return %d\n", __func__, status);
5103
5104 return status;
5105}
5106
f86f36a6
TM		 5107static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5108{
5109 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5110}
5111
5112static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5113 struct nfs4_slot *new,
5114 u32 max_slots,
5115 u32 ivalue)
5116{
5117 struct nfs4_slot *old = NULL;
5118 u32 i;
5119
5120 spin_lock(&tbl->slot_tbl_lock);
5121 if (new) {
5122 old = tbl->slots;
5123 tbl->slots = new;
5124 tbl->max_slots = max_slots;
5125 }
5126 tbl->highest_used_slotid = -1; /* no slot is currently used */
5127 for (i = 0; i < tbl->max_slots; i++)
5128 tbl->slots[i].seq_nr = ivalue;
5129 spin_unlock(&tbl->slot_tbl_lock);
5130 kfree(old);
5131}
5132
b73dafa7 5133/*
f86f36a6 5134 * (re)Initialise a slot table
b73dafa7 5135 */
f86f36a6
TM		 5136static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5137 u32 ivalue)
ac72b7b3 5138{
104aeba4 5139 struct nfs4_slot *new = NULL;
f86f36a6 5140 int ret = -ENOMEM;
ac72b7b3 5141
104aeba4
AA		 5142 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5143 max_reqs, tbl->max_slots);
ac72b7b3 5144
104aeba4
AA		 5145 /* Does the newly negotiated max_reqs match the existing slot table? */
5146 if (max_reqs != tbl->max_slots) {
f86f36a6 5147 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5148 if (!new)
5149 goto out;
104aeba4 5150 }
f86f36a6
TM		 5151 ret = 0;
5152
5153 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5154 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5155 tbl, tbl->slots, tbl->max_slots);
5156out:
5157 dprintk("<-- %s: return %d\n", __func__, ret);
5158 return ret;
5159}
5160
f8625a6a
RL		 5161/* Destroy the slot table */
5162static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5163{
5164 if (session->fc_slot_table.slots != NULL) {
5165 kfree(session->fc_slot_table.slots);
5166 session->fc_slot_table.slots = NULL;
5167 }
5168 if (session->bc_slot_table.slots != NULL) {
5169 kfree(session->bc_slot_table.slots);
5170 session->bc_slot_table.slots = NULL;
5171 }
5172 return;
5173}
5174
050047ce 5175/*
aacd5537 5176 * Initialize or reset the forechannel and backchannel tables
050047ce 5177 */
aacd5537 5178static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5179{
f26468fb 5180 struct nfs4_slot_table *tbl;
aacd5537 5181 int status;
050047ce 5182
aacd5537
AA		 5183 dprintk("--> %s\n", __func__);
5184 /* Fore channel */
5185 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5186 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5187 if (status) /* -ENOMEM */
5188 return status;
aacd5537
AA		 5189 /* Back channel */
5190 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5191 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5192 if (status && tbl->slots == NULL)
5193 /* Fore and back channel share a connection so get
5194 * both slot tables or neither */
5195 nfs4_destroy_slot_tables(ses);
f8625a6a 5196 return status;
557134a3
AA		 5197}
5198
5199struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5200{
5201 struct nfs4_session *session;
5202 struct nfs4_slot_table *tbl;
5203
8535b2be 5204 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5205 if (!session)
5206 return NULL;
76db6d95 5207
557134a3 5208 tbl = &session->fc_slot_table;
45d43c29 5209 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5210 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5211 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5212 init_completion(&tbl->complete);
f8625a6a
RL		 5213
5214 tbl = &session->bc_slot_table;
45d43c29 5215 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5216 spin_lock_init(&tbl->slot_tbl_lock);
5217 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5218 init_completion(&tbl->complete);
f8625a6a 5219
1055d76d
TM		 5220 session->session_state = 1<<NFS4_SESSION_INITING;
5221
557134a3
AA		 5222 session->clp = clp;
5223 return session;
5224}
5225
5226void nfs4_destroy_session(struct nfs4_session *session)
5227{
2446ab60
TM		 5228 struct rpc_xprt *xprt;
5229
5a0ffe54 5230 nfs4_proc_destroy_session(session);
2446ab60
TM		 5231
5232 rcu_read_lock();
5233 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5234 rcu_read_unlock();
5a0ffe54 5235 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5236 __func__, xprt);
5237 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5238 nfs4_destroy_slot_tables(session);
557134a3
AA		 5239 kfree(session);
5240}
5241
fc931582
AA		 5242/*
5243 * Initialize the values to be used by the client in CREATE_SESSION
5244 * If nfs4_init_session set the fore channel request and response sizes,
5245 * use them.
5246 *
5247 * Set the back channel max_resp_sz_cached to zero to force the client to
5248 * always set csa_cachethis to FALSE because the current implementation
5249 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5250 */
5251static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5252{
5253 struct nfs4_session *session = args->client->cl_session;
5254 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5255 mxresp_sz = session->fc_attrs.max_resp_sz;
5256
5257 if (mxrqst_sz == 0)
5258 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5259 if (mxresp_sz == 0)
5260 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5261 /* Fore channel attributes */
fc931582
AA		 5262 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5263 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5264 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5265 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5266
5267 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5268 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5269 __func__,
5270 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5271 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5272
5273 /* Back channel attributes */
fc931582
AA		 5274 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5275 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5276 args->bc_attrs.max_resp_sz_cached = 0;
5277 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5278 args->bc_attrs.max_reqs = 1;
5279
5280 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5281 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5282 __func__,
5283 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5284 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5285 args->bc_attrs.max_reqs);
5286}
5287
43c2e885 5288static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5289{
43c2e885
BF		 5290 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5291 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5292
43c2e885
BF		 5293 if (rcvd->max_resp_sz > sent->max_resp_sz)
5294 return -EINVAL;
5295 /*
5296 * Our requested max_ops is the minimum we need; we're not
5297 * prepared to break up compounds into smaller pieces than that.
5298 * So, no point even trying to continue if the server won't
5299 * cooperate:
5300 */
5301 if (rcvd->max_ops < sent->max_ops)
5302 return -EINVAL;
5303 if (rcvd->max_reqs == 0)
5304 return -EINVAL;
b4b9a0c1
VG		 5305 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5306 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5307 return 0;
8d35301d
AA		 5308}
5309
43c2e885
BF		 5310static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5311{
5312 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5313 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5314
43c2e885
BF		 5315 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5316 return -EINVAL;
5317 if (rcvd->max_resp_sz < sent->max_resp_sz)
5318 return -EINVAL;
5319 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5320 return -EINVAL;
5321 /* These would render the backchannel useless: */
b4b9a0c1 5322 if (rcvd->max_ops != sent->max_ops)
43c2e885 5323 return -EINVAL;
b4b9a0c1 5324 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5325 return -EINVAL;
5326 return 0;
5327}
8d35301d 5328
8d35301d
AA		 5329static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5330 struct nfs4_session *session)
5331{
43c2e885 5332 int ret;
8d35301d 5333
43c2e885
BF		 5334 ret = nfs4_verify_fore_channel_attrs(args, session);
5335 if (ret)
5336 return ret;
5337 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5338}
5339
fc931582
AA		 5340static int _nfs4_proc_create_session(struct nfs_client *clp)
5341{
5342 struct nfs4_session *session = clp->cl_session;
5343 struct nfs41_create_session_args args = {
5344 .client = clp,
5345 .cb_program = NFS4_CALLBACK,
5346 };
5347 struct nfs41_create_session_res res = {
5348 .client = clp,
5349 };
5350 struct rpc_message msg = {
5351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5352 .rpc_argp = &args,
5353 .rpc_resp = &res,
5354 };
5355 int status;
5356
5357 nfs4_init_channel_attrs(&args);
0f91421e 5358 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5359
1bd714f2 5360 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5361
8d35301d
AA		 5362 if (!status)
5363 /* Verify the session's negotiated channel_attrs values */
5364 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5365 if (!status) {
5366 /* Increment the clientid slot sequence id */
5367 clp->cl_seqid++;
5368 }
5369
5370 return status;
5371}
5372
5373/*
5374 * Issues a CREATE_SESSION operation to the server.
5375 * It is the responsibility of the caller to verify the session is
5376 * expired before calling this routine.
5377 */
f26468fb 5378int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5379{
5380 int status;
5381 unsigned *ptr;
fc931582
AA		 5382 struct nfs4_session *session = clp->cl_session;
5383
5384 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5385
fd954ae1 5386 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5387 if (status)
5388 goto out;
5389
aacd5537
AA		 5390 /* Init or reset the session slot tables */
5391 status = nfs4_setup_session_slot_tables(session);
5392 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5393 if (status)
5394 goto out;
5395
5396 ptr = (unsigned *)&session->sess_id.data[0];
5397 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5398 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5399out:
5400 dprintk("<-- %s\n", __func__);
5401 return status;
5402}
5403
0f3e66c6
AA		 5404/*
5405 * Issue the over-the-wire RPC DESTROY_SESSION.
5406 * The caller must serialize access to this routine.
5407 */
5408int nfs4_proc_destroy_session(struct nfs4_session *session)
5409{
5410 int status = 0;
5411 struct rpc_message msg;
5412
5413 dprintk("--> nfs4_proc_destroy_session\n");
5414
5415 /* session is still being setup */
5416 if (session->clp->cl_cons_state != NFS_CS_READY)
5417 return status;
5418
5419 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5420 msg.rpc_argp = session;
5421 msg.rpc_resp = NULL;
5422 msg.rpc_cred = NULL;
1bd714f2 5423 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5424
5425 if (status)
5426 printk(KERN_WARNING
f9fd2d9c 5427 "NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5428 "Session has been destroyed regardless...\n", status);
5429
5430 dprintk("<-- nfs4_proc_destroy_session\n");
5431 return status;
5432}
5433
fccba804
TM		 5434int nfs4_init_session(struct nfs_server *server)
5435{
5436 struct nfs_client *clp = server->nfs_client;
2449ea2e 5437 struct nfs4_session *session;
68bf05ef 5438 unsigned int rsize, wsize;
fccba804
TM		 5439 int ret;
5440
5441 if (!nfs4_has_session(clp))
5442 return 0;
5443
1055d76d
TM		 5444 session = clp->cl_session;
5445 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5446 return 0;
5447
68bf05ef
AA		 5448 rsize = server->rsize;
5449 if (rsize == 0)
5450 rsize = NFS_MAX_FILE_IO_SIZE;
5451 wsize = server->wsize;
5452 if (wsize == 0)
5453 wsize = NFS_MAX_FILE_IO_SIZE;
5454
68bf05ef
AA		 5455 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5456 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5457
fccba804
TM		 5458 ret = nfs4_recover_expired_lease(server);
5459 if (!ret)
5460 ret = nfs4_check_client_ready(clp);
5461 return ret;
5462}
5463
d83217c1
AA		 5464int nfs4_init_ds_session(struct nfs_client *clp)
5465{
5466 struct nfs4_session *session = clp->cl_session;
5467 int ret;
5468
5469 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5470 return 0;
5471
5472 ret = nfs4_client_recover_expired_lease(clp);
5473 if (!ret)
5474 /* Test for the DS role */
5475 if (!is_ds_client(clp))
5476 ret = -ENODEV;
5477 if (!ret)
5478 ret = nfs4_check_client_ready(clp);
5479 return ret;
5480
5481}
5482EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5483
5484
fc01cea9
AA		 5485/*
5486 * Renew the cl_session lease.
5487 */
d5f8d3fe
TM		 5488struct nfs4_sequence_data {
5489 struct nfs_client *clp;
5490 struct nfs4_sequence_args args;
5491 struct nfs4_sequence_res res;
5492};
5493
dc96aef9
AB		 5494static void nfs41_sequence_release(void *data)
5495{
d5f8d3fe
TM		 5496 struct nfs4_sequence_data *calldata = data;
5497 struct nfs_client *clp = calldata->clp;
dc96aef9 5498
7135840f
AB		 5499 if (atomic_read(&clp->cl_count) > 1)
5500 nfs4_schedule_state_renewal(clp);
5501 nfs_put_client(clp);
d5f8d3fe 5502 kfree(calldata);
dc96aef9
AB		 5503}
5504
aa5190d0
TM		 5505static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5506{
5507 switch(task->tk_status) {
5508 case -NFS4ERR_DELAY:
aa5190d0
TM		 5509 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5510 return -EAGAIN;
5511 default:
0400a6b0 5512 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5513 }
5514 return 0;
5515}
5516
dc96aef9 5517static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5518{
d5f8d3fe
TM		 5519 struct nfs4_sequence_data *calldata = data;
5520 struct nfs_client *clp = calldata->clp;
fc01cea9 5521
14516c3a
TM		 5522 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5523 return;
fc01cea9
AA		 5524
5525 if (task->tk_status < 0) {
5526 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5527 if (atomic_read(&clp->cl_count) == 1)
5528 goto out;
fc01cea9 5529
aa5190d0
TM		 5530 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5531 rpc_restart_call_prepare(task);
fc01cea9
AA		 5532 return;
5533 }
5534 }
fc01cea9 5535 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5536out:
fc01cea9
AA		 5537 dprintk("<-- %s\n", __func__);
5538}
5539
5540static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5541{
d5f8d3fe
TM		 5542 struct nfs4_sequence_data *calldata = data;
5543 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5544 struct nfs4_sequence_args *args;
5545 struct nfs4_sequence_res *res;
5546
fc01cea9
AA		 5547 args = task->tk_msg.rpc_argp;
5548 res = task->tk_msg.rpc_resp;
5549
9d12b216 5550 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5551 return;
5552 rpc_call_start(task);
5553}
5554
5555static const struct rpc_call_ops nfs41_sequence_ops = {
5556 .rpc_call_done = nfs41_sequence_call_done,
5557 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5558 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5559};
5560
71ac6da9 5561static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5562{
d5f8d3fe 5563 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5564 struct rpc_message msg = {
5565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5566 .rpc_cred = cred,
5567 };
71ac6da9
TM		 5568 struct rpc_task_setup task_setup_data = {
5569 .rpc_client = clp->cl_rpcclient,
5570 .rpc_message = &msg,
5571 .callback_ops = &nfs41_sequence_ops,
5572 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5573 };
fc01cea9 5574
7135840f 5575 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5576 return ERR_PTR(-EIO);
dfb4f309 5577 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5578 if (calldata == NULL) {
7135840f 5579 nfs_put_client(clp);
71ac6da9 5580 return ERR_PTR(-ENOMEM);
fc01cea9 5581 }
9d12b216 5582 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5583 msg.rpc_argp = &calldata->args;
5584 msg.rpc_resp = &calldata->res;
5585 calldata->clp = clp;
71ac6da9 5586 task_setup_data.callback_data = calldata;
fc01cea9 5587
71ac6da9
TM		 5588 return rpc_run_task(&task_setup_data);
5589}
5590
2f60ea6b 5591static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5592{
5593 struct rpc_task *task;
5594 int ret = 0;
5595
2f60ea6b
TM		 5596 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5597 return 0;
71ac6da9
TM		 5598 task = _nfs41_proc_sequence(clp, cred);
5599 if (IS_ERR(task))
5600 ret = PTR_ERR(task);
5601 else
bf294b41 5602 rpc_put_task_async(task);
71ac6da9
TM		 5603 dprintk("<-- %s status=%d\n", __func__, ret);
5604 return ret;
5605}
5606
5607static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5608{
5609 struct rpc_task *task;
5610 int ret;
5611
5612 task = _nfs41_proc_sequence(clp, cred);
5613 if (IS_ERR(task)) {
5614 ret = PTR_ERR(task);
5615 goto out;
5616 }
5617 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5618 if (!ret) {
5619 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5620
5621 if (task->tk_status == 0)
5622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5623 ret = task->tk_status;
b4410c2f 5624 }
71ac6da9
TM		 5625 rpc_put_task(task);
5626out:
5627 dprintk("<-- %s status=%d\n", __func__, ret);
5628 return ret;
fc01cea9
AA		 5629}
5630
fce5c838
RL		 5631struct nfs4_reclaim_complete_data {
5632 struct nfs_client *clp;
5633 struct nfs41_reclaim_complete_args arg;
5634 struct nfs41_reclaim_complete_res res;
5635};
5636
5637static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5638{
5639 struct nfs4_reclaim_complete_data *calldata = data;
5640
b257957e 5641 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5642 if (nfs41_setup_sequence(calldata->clp->cl_session,
5643 &calldata->arg.seq_args,
9d12b216 5644 &calldata->res.seq_res, task))
fce5c838
RL		 5645 return;
5646
5647 rpc_call_start(task);
5648}
5649
aa5190d0
TM		 5650static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5651{
5652 switch(task->tk_status) {
5653 case 0:
5654 case -NFS4ERR_COMPLETE_ALREADY:
5655 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5656 break;
5657 case -NFS4ERR_DELAY:
aa5190d0 5658 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5659 /* fall through */
5660 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5661 return -EAGAIN;
5662 default:
0400a6b0 5663 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5664 }
5665 return 0;
5666}
5667
fce5c838
RL		 5668static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5669{
5670 struct nfs4_reclaim_complete_data *calldata = data;
5671 struct nfs_client *clp = calldata->clp;
5672 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5673
5674 dprintk("--> %s\n", __func__);
14516c3a
TM		 5675 if (!nfs41_sequence_done(task, res))
5676 return;
fce5c838 5677
aa5190d0
TM		 5678 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5679 rpc_restart_call_prepare(task);
5680 return;
5681 }
fce5c838
RL		 5682 dprintk("<-- %s\n", __func__);
5683}
5684
5685static void nfs4_free_reclaim_complete_data(void *data)
5686{
5687 struct nfs4_reclaim_complete_data *calldata = data;
5688
5689 kfree(calldata);
5690}
5691
5692static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5693 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5694 .rpc_call_done = nfs4_reclaim_complete_done,
5695 .rpc_release = nfs4_free_reclaim_complete_data,
5696};
5697
5698/*
5699 * Issue a global reclaim complete.
5700 */
5701static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5702{
5703 struct nfs4_reclaim_complete_data *calldata;
5704 struct rpc_task *task;
5705 struct rpc_message msg = {
5706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5707 };
5708 struct rpc_task_setup task_setup_data = {
5709 .rpc_client = clp->cl_rpcclient,
5710 .rpc_message = &msg,
5711 .callback_ops = &nfs4_reclaim_complete_call_ops,
5712 .flags = RPC_TASK_ASYNC,
5713 };
5714 int status = -ENOMEM;
5715
5716 dprintk("--> %s\n", __func__);
8535b2be 5717 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5718 if (calldata == NULL)
5719 goto out;
5720 calldata->clp = clp;
5721 calldata->arg.one_fs = 0;
fce5c838 5722
9d12b216 5723 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5724 msg.rpc_argp = &calldata->arg;
5725 msg.rpc_resp = &calldata->res;
5726 task_setup_data.callback_data = calldata;
5727 task = rpc_run_task(&task_setup_data);
acf82b85 5728 if (IS_ERR(task)) {
fce5c838 5729 status = PTR_ERR(task);
acf82b85
DC		 5730 goto out;
5731 }
c34c32ea
AA		 5732 status = nfs4_wait_for_completion_rpc_task(task);
5733 if (status == 0)
5734 status = task->tk_status;
fce5c838 5735 rpc_put_task(task);
acf82b85 5736 return 0;
fce5c838
RL		 5737out:
5738 dprintk("<-- %s status=%d\n", __func__, status);
5739 return status;
5740}
b1f69b75
AA		 5741
5742static void
5743nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5744{
5745 struct nfs4_layoutget *lgp = calldata;
c31663d4 5746 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5747
5748 dprintk("--> %s\n", __func__);
c31663d4
FI		 5749 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5750 * right now covering the LAYOUTGET we are about to send.
5751 * However, that is not so catastrophic, and there seems
5752 * to be no way to prevent it completely.
5753 */
b1f69b75 5754 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 5755 &lgp->res.seq_res, task))
b1f69b75 5756 return;
cf7d63f1
FI		 5757 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5758 NFS_I(lgp->args.inode)->layout,
5759 lgp->args.ctx->state)) {
5760 rpc_exit(task, NFS4_OK);
5761 return;
5762 }
b1f69b75
AA		 5763 rpc_call_start(task);
5764}
5765
5766static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5767{
5768 struct nfs4_layoutget *lgp = calldata;
5769 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5770
5771 dprintk("--> %s\n", __func__);
5772
5773 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5774 return;
5775
5776 switch (task->tk_status) {
5777 case 0:
5778 break;
5779 case -NFS4ERR_LAYOUTTRYLATER:
5780 case -NFS4ERR_RECALLCONFLICT:
5781 task->tk_status = -NFS4ERR_DELAY;
5782 /* Fall through */
5783 default:
5784 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5785 rpc_restart_call_prepare(task);
5786 return;
5787 }
5788 }
b1f69b75
AA		 5789 dprintk("<-- %s\n", __func__);
5790}
5791
5792static void nfs4_layoutget_release(void *calldata)
5793{
5794 struct nfs4_layoutget *lgp = calldata;
5795
5796 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5797 put_nfs_open_context(lgp->args.ctx);
5798 kfree(calldata);
5799 dprintk("<-- %s\n", __func__);
5800}
5801
5802static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5803 .rpc_call_prepare = nfs4_layoutget_prepare,
5804 .rpc_call_done = nfs4_layoutget_done,
5805 .rpc_release = nfs4_layoutget_release,
5806};
5807
5808int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5809{
5810 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5811 struct rpc_task *task;
5812 struct rpc_message msg = {
5813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5814 .rpc_argp = &lgp->args,
5815 .rpc_resp = &lgp->res,
5816 };
5817 struct rpc_task_setup task_setup_data = {
5818 .rpc_client = server->client,
5819 .rpc_message = &msg,
5820 .callback_ops = &nfs4_layoutget_call_ops,
5821 .callback_data = lgp,
5822 .flags = RPC_TASK_ASYNC,
5823 };
5824 int status = 0;
5825
5826 dprintk("--> %s\n", __func__);
5827
35124a09 5828 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 5829 lgp->res.seq_res.sr_slot = NULL;
9d12b216 5830 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 5831 task = rpc_run_task(&task_setup_data);
5832 if (IS_ERR(task))
5833 return PTR_ERR(task);
5834 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5835 if (status == 0)
5836 status = task->tk_status;
5837 if (status == 0)
5838 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5839 rpc_put_task(task);
5840 dprintk("<-- %s status=%d\n", __func__, status);
5841 return status;
5842}
5843
cbe82603
BH		 5844static void
5845nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5846{
5847 struct nfs4_layoutreturn *lrp = calldata;
5848
5849 dprintk("--> %s\n", __func__);
5850 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 5851 &lrp->res.seq_res, task))
cbe82603
BH		 5852 return;
5853 rpc_call_start(task);
5854}
5855
5856static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5857{
5858 struct nfs4_layoutreturn *lrp = calldata;
5859 struct nfs_server *server;
a56aaa02 5860 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5861
5862 dprintk("--> %s\n", __func__);
5863
5864 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5865 return;
5866
5867 server = NFS_SERVER(lrp->args.inode);
5868 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5869 rpc_restart_call_prepare(task);
cbe82603
BH		 5870 return;
5871 }
a2e1d4f2 5872 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5873 if (task->tk_status == 0) {
cbe82603 5874 if (lrp->res.lrs_present) {
cbe82603 5875 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5876 } else
5877 BUG_ON(!list_empty(&lo->plh_segs));
5878 }
a2e1d4f2
FI		 5879 lo->plh_block_lgets--;
5880 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5881 dprintk("<-- %s\n", __func__);
5882}
5883
5884static void nfs4_layoutreturn_release(void *calldata)
5885{
5886 struct nfs4_layoutreturn *lrp = calldata;
5887
5888 dprintk("--> %s\n", __func__);
a56aaa02 5889 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5890 kfree(calldata);
5891 dprintk("<-- %s\n", __func__);
5892}
5893
5894static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5895 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5896 .rpc_call_done = nfs4_layoutreturn_done,
5897 .rpc_release = nfs4_layoutreturn_release,
5898};
5899
5900int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5901{
5902 struct rpc_task *task;
5903 struct rpc_message msg = {
5904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5905 .rpc_argp = &lrp->args,
5906 .rpc_resp = &lrp->res,
5907 };
5908 struct rpc_task_setup task_setup_data = {
5909 .rpc_client = lrp->clp->cl_rpcclient,
5910 .rpc_message = &msg,
5911 .callback_ops = &nfs4_layoutreturn_call_ops,
5912 .callback_data = lrp,
5913 };
5914 int status;
5915
5916 dprintk("--> %s\n", __func__);
9d12b216 5917 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 5918 task = rpc_run_task(&task_setup_data);
5919 if (IS_ERR(task))
5920 return PTR_ERR(task);
5921 status = task->tk_status;
5922 dprintk("<-- %s status=%d\n", __func__, status);
5923 rpc_put_task(task);
5924 return status;
5925}
5926
7f11d8d3
AA		 5927/*
5928 * Retrieve the list of Data Server devices from the MDS.
5929 */
5930static int _nfs4_getdevicelist(struct nfs_server *server,
5931 const struct nfs_fh *fh,
5932 struct pnfs_devicelist *devlist)
5933{
5934 struct nfs4_getdevicelist_args args = {
5935 .fh = fh,
5936 .layoutclass = server->pnfs_curr_ld->id,
5937 };
5938 struct nfs4_getdevicelist_res res = {
5939 .devlist = devlist,
5940 };
5941 struct rpc_message msg = {
5942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5943 .rpc_argp = &args,
5944 .rpc_resp = &res,
5945 };
5946 int status;
5947
5948 dprintk("--> %s\n", __func__);
5949 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5950 &res.seq_res, 0);
5951 dprintk("<-- %s status=%d\n", __func__, status);
5952 return status;
5953}
5954
5955int nfs4_proc_getdevicelist(struct nfs_server *server,
5956 const struct nfs_fh *fh,
5957 struct pnfs_devicelist *devlist)
5958{
5959 struct nfs4_exception exception = { };
5960 int err;
5961
5962 do {
5963 err = nfs4_handle_exception(server,
5964 _nfs4_getdevicelist(server, fh, devlist),
5965 &exception);
5966 } while (exception.retry);
5967
5968 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5969 err, devlist->num_devs);
5970
5971 return err;
5972}
5973EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5974
b1f69b75
AA		 5975static int
5976_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5977{
5978 struct nfs4_getdeviceinfo_args args = {
5979 .pdev = pdev,
5980 };
5981 struct nfs4_getdeviceinfo_res res = {
5982 .pdev = pdev,
5983 };
5984 struct rpc_message msg = {
5985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5986 .rpc_argp = &args,
5987 .rpc_resp = &res,
5988 };
5989 int status;
5990
5991 dprintk("--> %s\n", __func__);
7c513058 5992 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5993 dprintk("<-- %s status=%d\n", __func__, status);
5994
5995 return status;
5996}
5997
5998int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5999{
6000 struct nfs4_exception exception = { };
6001 int err;
6002
6003 do {
6004 err = nfs4_handle_exception(server,
6005 _nfs4_proc_getdeviceinfo(server, pdev),
6006 &exception);
6007 } while (exception.retry);
6008 return err;
6009}
6010EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6011
863a3c6c
AA		 6012static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6013{
6014 struct nfs4_layoutcommit_data *data = calldata;
6015 struct nfs_server *server = NFS_SERVER(data->args.inode);
6016
6017 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6018 &data->res.seq_res, task))
863a3c6c
AA		 6019 return;
6020 rpc_call_start(task);
6021}
6022
6023static void
6024nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6025{
6026 struct nfs4_layoutcommit_data *data = calldata;
6027 struct nfs_server *server = NFS_SERVER(data->args.inode);
6028
6029 if (!nfs4_sequence_done(task, &data->res.seq_res))
6030 return;
6031
6032 switch (task->tk_status) { /* Just ignore these failures */
6033 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6034 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6035 case NFS4ERR_BADLAYOUT: /* no layout */
6036 case NFS4ERR_GRACE: /* loca_recalim always false */
6037 task->tk_status = 0;
6038 }
6039
6040 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6041 rpc_restart_call_prepare(task);
863a3c6c
AA		 6042 return;
6043 }
6044
6045 if (task->tk_status == 0)
6046 nfs_post_op_update_inode_force_wcc(data->args.inode,
6047 data->res.fattr);
6048}
6049
6050static void nfs4_layoutcommit_release(void *calldata)
6051{
6052 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6053 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6054 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6055
db29c089 6056 pnfs_cleanup_layoutcommit(data);
863a3c6c 6057 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6058 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6059 list_del_init(&lseg->pls_lc_list);
6060 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6061 &lseg->pls_flags))
6062 put_lseg(lseg);
6063 }
92407e75
PT		 6064
6065 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6066 smp_mb__after_clear_bit();
6067 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6068
863a3c6c
AA		 6069 put_rpccred(data->cred);
6070 kfree(data);
6071}
6072
6073static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6074 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6075 .rpc_call_done = nfs4_layoutcommit_done,
6076 .rpc_release = nfs4_layoutcommit_release,
6077};
6078
6079int
ef311537 6080nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6081{
6082 struct rpc_message msg = {
6083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6084 .rpc_argp = &data->args,
6085 .rpc_resp = &data->res,
6086 .rpc_cred = data->cred,
6087 };
6088 struct rpc_task_setup task_setup_data = {
6089 .task = &data->task,
6090 .rpc_client = NFS_CLIENT(data->args.inode),
6091 .rpc_message = &msg,
6092 .callback_ops = &nfs4_layoutcommit_ops,
6093 .callback_data = data,
6094 .flags = RPC_TASK_ASYNC,
6095 };
6096 struct rpc_task *task;
6097 int status = 0;
6098
6099 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6100 "lbw: %llu inode %lu\n",
6101 data->task.tk_pid, sync,
6102 data->args.lastbytewritten,
6103 data->args.inode->i_ino);
6104
9d12b216 6105 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6106 task = rpc_run_task(&task_setup_data);
6107 if (IS_ERR(task))
6108 return PTR_ERR(task);
ef311537 6109 if (sync == false)
863a3c6c
AA		 6110 goto out;
6111 status = nfs4_wait_for_completion_rpc_task(task);
6112 if (status != 0)
6113 goto out;
6114 status = task->tk_status;
6115out:
6116 dprintk("%s: status %d\n", __func__, status);
6117 rpc_put_task(task);
6118 return status;
6119}
fca78d6d
BS		 6120
6121static int
6122_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6123 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6124{
6125 struct nfs41_secinfo_no_name_args args = {
6126 .style = SECINFO_STYLE_CURRENT_FH,
6127 };
6128 struct nfs4_secinfo_res res = {
6129 .flavors = flavors,
6130 };
6131 struct rpc_message msg = {
6132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6133 .rpc_argp = &args,
6134 .rpc_resp = &res,
6135 };
6136 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6137}
6138
6139static int
6140nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6141 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6142{
6143 struct nfs4_exception exception = { };
6144 int err;
6145 do {
6146 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6147 switch (err) {
6148 case 0:
6149 case -NFS4ERR_WRONGSEC:
6150 case -NFS4ERR_NOTSUPP:
6151 break;
6152 default:
6153 err = nfs4_handle_exception(server, err, &exception);
6154 }
6155 } while (exception.retry);
6156 return err;
6157}
6158
6159static int
6160nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6161 struct nfs_fsinfo *info)
6162{
6163 int err;
6164 struct page *page;
6165 rpc_authflavor_t flavor;
6166 struct nfs4_secinfo_flavors *flavors;
6167
6168 page = alloc_page(GFP_KERNEL);
6169 if (!page) {
6170 err = -ENOMEM;
6171 goto out;
6172 }
6173
6174 flavors = page_address(page);
6175 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6176
6177 /*
6178 * Fall back on "guess and check" method if
6179 * the server doesn't support SECINFO_NO_NAME
6180 */
6181 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6182 err = nfs4_find_root_sec(server, fhandle, info);
6183 goto out_freepage;
6184 }
6185 if (err)
6186 goto out_freepage;
6187
6188 flavor = nfs_find_best_sec(flavors);
6189 if (err == 0)
6190 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6191
6192out_freepage:
6193 put_page(page);
6194 if (err == -EACCES)
6195 return -EPERM;
6196out:
6197 return err;
6198}
1cab0652
BS		 6199
6200static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794 6201{
1cab0652 6202 int status;
7d974794 6203 struct nfs41_test_stateid_args args = {
1cab0652 6204 .stateid = stateid,
7d974794
BS		 6205 };
6206 struct nfs41_test_stateid_res res;
6207 struct rpc_message msg = {
6208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6209 .rpc_argp = &args,
6210 .rpc_resp = &res,
6211 };
1cab0652 6212
9d12b216 6213 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6214 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6215
6216 if (status == NFS_OK)
6217 return res.status;
6218 return status;
7d974794
BS		 6219}
6220
1cab0652 6221static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6222{
6223 struct nfs4_exception exception = { };
6224 int err;
6225 do {
6226 err = nfs4_handle_exception(server,
1cab0652 6227 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6228 &exception);
6229 } while (exception.retry);
6230 return err;
6231}
9aeda35f 6232
1cab0652 6233static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6234{
9aeda35f 6235 struct nfs41_free_stateid_args args = {
1cab0652 6236 .stateid = stateid,
9aeda35f
BS		 6237 };
6238 struct nfs41_free_stateid_res res;
6239 struct rpc_message msg = {
6240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6241 .rpc_argp = &args,
6242 .rpc_resp = &res,
6243 };
6244
9d12b216
TM		 6245 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6246 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6247}
6248
1cab0652 6249static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6250{
6251 struct nfs4_exception exception = { };
6252 int err;
6253 do {
6254 err = nfs4_handle_exception(server,
1cab0652 6255 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6256 &exception);
6257 } while (exception.retry);
6258 return err;
6259}
557134a3
AA		 6260#endif /* CONFIG_NFS_V4_1 */
6261
591d71cb 6262struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6263 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6264 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6265 .recover_open = nfs4_open_reclaim,
6266 .recover_lock = nfs4_lock_reclaim,
591d71cb 6267 .establish_clid = nfs4_init_clientid,
90a16617 6268 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6269};
6270
591d71cb
AA		 6271#if defined(CONFIG_NFS_V4_1)
6272struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6273 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6274 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6275 .recover_open = nfs4_open_reclaim,
6276 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6277 .establish_clid = nfs41_init_clientid,
b4b82607 6278 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6279 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6280};
6281#endif /* CONFIG_NFS_V4_1 */
6282
6283struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6284 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6285 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6286 .recover_open = nfs4_open_expired,
6287 .recover_lock = nfs4_lock_expired,
6288 .establish_clid = nfs4_init_clientid,
90a16617 6289 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6290};
6291
6292#if defined(CONFIG_NFS_V4_1)
6293struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6294 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6295 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6296 .recover_open = nfs41_open_expired,
6297 .recover_lock = nfs41_lock_expired,
4d643d1d 6298 .establish_clid = nfs41_init_clientid,
b4b82607 6299 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6300};
591d71cb 6301#endif /* CONFIG_NFS_V4_1 */
1da177e4 6302
29fba38b
BH		 6303struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6304 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6305 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6306 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6307};
6308
6309#if defined(CONFIG_NFS_V4_1)
6310struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6311 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6312 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6313 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6314};
6315#endif
6316
97dc1359
TM		 6317static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6318 .minor_version = 0,
6319 .call_sync = _nfs4_call_sync,
e047a10c 6320 .validate_stateid = nfs4_validate_delegation_stateid,
fca78d6d 6321 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6322 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6323 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6324 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6325};
6326
6327#if defined(CONFIG_NFS_V4_1)
6328static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6329 .minor_version = 1,
6330 .call_sync = _nfs4_call_sync_session,
e047a10c 6331 .validate_stateid = nfs41_validate_delegation_stateid,
fca78d6d 6332 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6333 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6334 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6335 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6336};
6337#endif
6338
97dc1359
TM		 6339const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6340 [0] = &nfs_v4_0_minor_ops,
6341#if defined(CONFIG_NFS_V4_1)
6342 [1] = &nfs_v4_1_minor_ops,
6343#endif
6344};
6345
92e1d5be 6346static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6347 .permission = nfs_permission,
6348 .getattr = nfs_getattr,
6349 .setattr = nfs_setattr,
64c2ce8b
AK		 6350 .getxattr = generic_getxattr,
6351 .setxattr = generic_setxattr,
6352 .listxattr = generic_listxattr,
6353 .removexattr = generic_removexattr,
6b3b5496
BF		 6354};
6355
509de811 6356const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6357 .version = 4, /* protocol version */
6358 .dentry_ops = &nfs4_dentry_operations,
6359 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6360 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6361 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6362 .getroot = nfs4_proc_get_root,
6363 .getattr = nfs4_proc_getattr,
6364 .setattr = nfs4_proc_setattr,
6365 .lookup = nfs4_proc_lookup,
6366 .access = nfs4_proc_access,
6367 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6368 .create = nfs4_proc_create,
6369 .remove = nfs4_proc_remove,
6370 .unlink_setup = nfs4_proc_unlink_setup,
6371 .unlink_done = nfs4_proc_unlink_done,
6372 .rename = nfs4_proc_rename,
d3d4152a
JL		 6373 .rename_setup = nfs4_proc_rename_setup,
6374 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6375 .link = nfs4_proc_link,
6376 .symlink = nfs4_proc_symlink,
6377 .mkdir = nfs4_proc_mkdir,
6378 .rmdir = nfs4_proc_remove,
6379 .readdir = nfs4_proc_readdir,
6380 .mknod = nfs4_proc_mknod,
6381 .statfs = nfs4_proc_statfs,
6382 .fsinfo = nfs4_proc_fsinfo,
6383 .pathconf = nfs4_proc_pathconf,
e9326dca 6384 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6385 .decode_dirent = nfs4_decode_dirent,
6386 .read_setup = nfs4_proc_read_setup,
ec06c096 6387 .read_done = nfs4_read_done,
1da177e4 6388 .write_setup = nfs4_proc_write_setup,
788e7a89 6389 .write_done = nfs4_write_done,
1da177e4 6390 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6391 .commit_done = nfs4_commit_done,
1da177e4 6392 .lock = nfs4_proc_lock,
e50a1c2e 6393 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6394 .close_context = nfs4_close_context,
2b484297 6395 .open_context = nfs4_atomic_open,
45a52a02 6396 .init_client = nfs4_init_client,
5a5ea0d4 6397 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6398};
6399
64c2ce8b
AK		 6400static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6401 .prefix = XATTR_NAME_NFSV4_ACL,
6402 .list = nfs4_xattr_list_nfs4_acl,
6403 .get = nfs4_xattr_get_nfs4_acl,
6404 .set = nfs4_xattr_set_nfs4_acl,
6405};
6406
6407const struct xattr_handler *nfs4_xattr_handlers[] = {
6408 &nfs4_xattr_nfs4_acl_handler,
6409 NULL
6410};
6411
ef159e91
TM		 6412module_param(max_session_slots, ushort, 0644);
6413MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6414 "requests the client will negotiate");
6415
1da177e4
LT		 6416/*
6417 * Local variables:
6418 * c-basic-offset: 8
6419 * End:
6420 */
Linux kernel - Deliverables
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