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NFS: Introduce NFS_ATTR_FATTR_V4_LOCATIONS
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
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
LT		 2222 server->acl_bitmask = res.acl_bitmask;
2223 }
cccef3b9 2224
1da177e4
LT		 2225 return status;
2226}
2227
55a97593 2228int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2229{
2230 struct nfs4_exception exception = { };
2231 int err;
2232 do {
2233 err = nfs4_handle_exception(server,
2234 _nfs4_server_capabilities(server, fhandle),
2235 &exception);
2236 } while (exception.retry);
2237 return err;
2238}
2239
2240static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2241 struct nfs_fsinfo *info)
2242{
1da177e4
LT		 2243 struct nfs4_lookup_root_arg args = {
2244 .bitmask = nfs4_fattr_bitmap,
2245 };
2246 struct nfs4_lookup_res res = {
2247 .server = server,
0e574af1 2248 .fattr = info->fattr,
1da177e4
LT		 2249 .fh = fhandle,
2250 };
2251 struct rpc_message msg = {
2252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2253 .rpc_argp = &args,
2254 .rpc_resp = &res,
2255 };
008f55d0 2256
0e574af1 2257 nfs_fattr_init(info->fattr);
7c513058 2258 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2259}
2260
2261static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2262 struct nfs_fsinfo *info)
2263{
2264 struct nfs4_exception exception = { };
2265 int err;
2266 do {
fb8a5ba8
BS		 2267 err = _nfs4_lookup_root(server, fhandle, info);
2268 switch (err) {
2269 case 0:
2270 case -NFS4ERR_WRONGSEC:
2271 break;
2272 default:
2273 err = nfs4_handle_exception(server, err, &exception);
2274 }
1da177e4
LT		 2275 } while (exception.retry);
2276 return err;
2277}
2278
8f70e95f
BS		 2279static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2280 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2281{
2282 struct rpc_auth *auth;
2283 int ret;
2284
2285 auth = rpcauth_create(flavor, server->client);
2286 if (!auth) {
2287 ret = -EIO;
2288 goto out;
2289 }
2290 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2291out:
2292 return ret;
2293}
2294
801a16dc 2295static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2296 struct nfs_fsinfo *info)
1da177e4 2297{
8f70e95f 2298 int i, len, status = 0;
0fabee24 2299 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2300
801a16dc
BS		 2301 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2302 flav_array[len] = RPC_AUTH_NULL;
2303 len += 1;
8f70e95f
BS		 2304
2305 for (i = 0; i < len; i++) {
2306 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2307 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2308 continue;
2309 break;
8f70e95f 2310 }
fb8a5ba8
BS		 2311 /*
2312 * -EACCESS could mean that the user doesn't have correct permissions
2313 * to access the mount. It could also mean that we tried to mount
2314 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2315 * existing mount programs don't handle -EACCES very well so it should
2316 * be mapped to -EPERM instead.
2317 */
2318 if (status == -EACCES)
2319 status = -EPERM;
801a16dc
BS		 2320 return status;
2321}
2322
2323/*
2324 * get the file handle for the "/" directory on the server
2325 */
2326static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2327 struct nfs_fsinfo *info)
2328{
fca78d6d 2329 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2330 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2331 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2332 /*
2333 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2334 * by nfs4_map_errors() as this function exits.
2335 */
fca78d6d 2336 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2337 if (status == 0)
2338 status = nfs4_server_capabilities(server, fhandle);
2339 if (status == 0)
2340 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2341 return nfs4_map_errors(status);
1da177e4
LT		 2342}
2343
6b97fd3d
MN		 2344/*
2345 * Get locations and (maybe) other attributes of a referral.
2346 * Note that we'll actually follow the referral later when
2347 * we detect fsid mismatch in inode revalidation
2348 */
533eb461
AA		 2349static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2350 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2351{
2352 int status = -ENOMEM;
2353 struct page *page = NULL;
2354 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2355
2356 page = alloc_page(GFP_KERNEL);
2357 if (page == NULL)
2358 goto out;
2359 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2360 if (locations == NULL)
2361 goto out;
2362
c228fd3a 2363 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2364 if (status != 0)
2365 goto out;
2366 /* Make sure server returned a different fsid for the referral */
2367 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2368 dprintk("%s: server did not return a different fsid for"
2369 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2370 status = -EIO;
2371 goto out;
2372 }
533eb461
AA		 2373 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2374 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2375
533eb461 2376 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2377 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2378 memset(fhandle, 0, sizeof(struct nfs_fh));
2379out:
2380 if (page)
2381 __free_page(page);
5d7ca35a 2382 kfree(locations);
6b97fd3d
MN		 2383 return status;
2384}
2385
1da177e4
LT		 2386static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2387{
2388 struct nfs4_getattr_arg args = {
2389 .fh = fhandle,
2390 .bitmask = server->attr_bitmask,
2391 };
2392 struct nfs4_getattr_res res = {
2393 .fattr = fattr,
2394 .server = server,
2395 };
2396 struct rpc_message msg = {
2397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2398 .rpc_argp = &args,
2399 .rpc_resp = &res,
2400 };
2401
0e574af1 2402 nfs_fattr_init(fattr);
7c513058 2403 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2404}
2405
2406static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2407{
2408 struct nfs4_exception exception = { };
2409 int err;
2410 do {
2411 err = nfs4_handle_exception(server,
2412 _nfs4_proc_getattr(server, fhandle, fattr),
2413 &exception);
2414 } while (exception.retry);
2415 return err;
2416}
2417
2418/*
2419 * The file is not closed if it is opened due to the a request to change
2420 * the size of the file. The open call will not be needed once the
2421 * VFS layer lookup-intents are implemented.
2422 *
2423 * Close is called when the inode is destroyed.
2424 * If we haven't opened the file for O_WRONLY, we
2425 * need to in the size_change case to obtain a stateid.
2426 *
2427 * Got race?
2428 * Because OPEN is always done by name in nfsv4, it is
2429 * possible that we opened a different file by the same
2430 * name. We can recognize this race condition, but we
2431 * can't do anything about it besides returning an error.
2432 *
2433 * This will be fixed with VFS changes (lookup-intent).
2434 */
2435static int
2436nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2437 struct iattr *sattr)
2438{
08e9eac4 2439 struct inode *inode = dentry->d_inode;
659bfcd6 2440 struct rpc_cred *cred = NULL;
d530838b 2441 struct nfs4_state *state = NULL;
1da177e4
LT		 2442 int status;
2443
8a1636c4
BH		 2444 if (pnfs_ld_layoutret_on_setattr(inode))
2445 pnfs_return_layout(inode);
2446
0e574af1 2447 nfs_fattr_init(fattr);
1da177e4 2448
d530838b 2449 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2450 if (sattr->ia_valid & ATTR_FILE) {
2451 struct nfs_open_context *ctx;
2452
2453 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2454 if (ctx) {
2455 cred = ctx->cred;
2456 state = ctx->state;
2457 }
659bfcd6 2458 }
08e9eac4 2459
536e43d1
TM		 2460 /* Deal with open(O_TRUNC) */
2461 if (sattr->ia_valid & ATTR_OPEN)
2462 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2463
659bfcd6 2464 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2465 if (status == 0)
2466 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2467 return status;
2468}
2469
0c2e53f1
TM		 2470static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2471 const struct qstr *name, struct nfs_fh *fhandle,
2472 struct nfs_fattr *fattr)
2b3de441 2473{
0c2e53f1 2474 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2475 int status;
2476 struct nfs4_lookup_arg args = {
2477 .bitmask = server->attr_bitmask,
0c2e53f1 2478 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2479 .name = name,
2480 };
2481 struct nfs4_lookup_res res = {
2482 .server = server,
2483 .fattr = fattr,
2484 .fh = fhandle,
2485 };
2486 struct rpc_message msg = {
2487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2488 .rpc_argp = &args,
2489 .rpc_resp = &res,
2490 };
2491
2492 nfs_fattr_init(fattr);
2493
1da177e4 2494 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2495 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2496 dprintk("NFS reply lookup: %d\n", status);
2497 return status;
2498}
2499
7ebb9315
BS		 2500void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2501{
2502 memset(fh, 0, sizeof(struct nfs_fh));
2503 fattr->fsid.major = 1;
2504 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2505 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2506 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2507 fattr->nlink = 2;
2508}
2509
7c513058
BS		 2510static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2511 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2512{
2513 struct nfs4_exception exception = { };
2514 int err;
2515 do {
0c2e53f1
TM		 2516 int status;
2517
2518 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2519 switch (status) {
08ef7bd3
TM		 2520 case -NFS4ERR_BADNAME:
2521 return -ENOENT;
0c2e53f1 2522 case -NFS4ERR_MOVED:
a6f498a8 2523 return nfs4_get_referral(dir, name, fattr, fhandle);
0c2e53f1 2524 case -NFS4ERR_WRONGSEC:
7ebb9315 2525 nfs_fixup_secinfo_attributes(fattr, fhandle);
0c2e53f1
TM		 2526 }
2527 err = nfs4_handle_exception(NFS_SERVER(dir),
2528 status, &exception);
1da177e4
LT		 2529 } while (exception.retry);
2530 return err;
2531}
2532
2533static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2534{
76b32999 2535 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2536 struct nfs4_accessargs args = {
2537 .fh = NFS_FH(inode),
a4980e78 2538 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2539 };
2540 struct nfs4_accessres res = {
2541 .server = server,
1da177e4 2542 };
1da177e4
LT		 2543 struct rpc_message msg = {
2544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2545 .rpc_argp = &args,
2546 .rpc_resp = &res,
2547 .rpc_cred = entry->cred,
2548 };
2549 int mode = entry->mask;
2550 int status;
2551
2552 /*
2553 * Determine which access bits we want to ask for...
2554 */
2555 if (mode & MAY_READ)
2556 args.access |= NFS4_ACCESS_READ;
2557 if (S_ISDIR(inode->i_mode)) {
2558 if (mode & MAY_WRITE)
2559 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2560 if (mode & MAY_EXEC)
2561 args.access |= NFS4_ACCESS_LOOKUP;
2562 } else {
2563 if (mode & MAY_WRITE)
2564 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2565 if (mode & MAY_EXEC)
2566 args.access |= NFS4_ACCESS_EXECUTE;
2567 }
c407d41a
TM		 2568
2569 res.fattr = nfs_alloc_fattr();
2570 if (res.fattr == NULL)
2571 return -ENOMEM;
2572
7c513058 2573 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2574 if (!status) {
2575 entry->mask = 0;
2576 if (res.access & NFS4_ACCESS_READ)
2577 entry->mask |= MAY_READ;
2578 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2579 entry->mask |= MAY_WRITE;
2580 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2581 entry->mask |= MAY_EXEC;
c407d41a 2582 nfs_refresh_inode(inode, res.fattr);
1da177e4 2583 }
c407d41a 2584 nfs_free_fattr(res.fattr);
1da177e4
LT		 2585 return status;
2586}
2587
2588static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2589{
2590 struct nfs4_exception exception = { };
2591 int err;
2592 do {
2593 err = nfs4_handle_exception(NFS_SERVER(inode),
2594 _nfs4_proc_access(inode, entry),
2595 &exception);
2596 } while (exception.retry);
2597 return err;
2598}
2599
2600/*
2601 * TODO: For the time being, we don't try to get any attributes
2602 * along with any of the zero-copy operations READ, READDIR,
2603 * READLINK, WRITE.
2604 *
2605 * In the case of the first three, we want to put the GETATTR
2606 * after the read-type operation -- this is because it is hard
2607 * to predict the length of a GETATTR response in v4, and thus
2608 * align the READ data correctly. This means that the GETATTR
2609 * may end up partially falling into the page cache, and we should
2610 * shift it into the 'tail' of the xdr_buf before processing.
2611 * To do this efficiently, we need to know the total length
2612 * of data received, which doesn't seem to be available outside
2613 * of the RPC layer.
2614 *
2615 * In the case of WRITE, we also want to put the GETATTR after
2616 * the operation -- in this case because we want to make sure
2617 * we get the post-operation mtime and size. This means that
2618 * we can't use xdr_encode_pages() as written: we need a variant
2619 * of it which would leave room in the 'tail' iovec.
2620 *
2621 * Both of these changes to the XDR layer would in fact be quite
2622 * minor, but I decided to leave them for a subsequent patch.
2623 */
2624static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2625 unsigned int pgbase, unsigned int pglen)
2626{
2627 struct nfs4_readlink args = {
2628 .fh = NFS_FH(inode),
2629 .pgbase = pgbase,
2630 .pglen = pglen,
2631 .pages = &page,
2632 };
f50c7000 2633 struct nfs4_readlink_res res;
1da177e4
LT		 2634 struct rpc_message msg = {
2635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2636 .rpc_argp = &args,
f50c7000 2637 .rpc_resp = &res,
1da177e4
LT		 2638 };
2639
7c513058 2640 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2641}
2642
2643static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2644 unsigned int pgbase, unsigned int pglen)
2645{
2646 struct nfs4_exception exception = { };
2647 int err;
2648 do {
2649 err = nfs4_handle_exception(NFS_SERVER(inode),
2650 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2651 &exception);
2652 } while (exception.retry);
2653 return err;
2654}
2655
1da177e4
LT		 2656/*
2657 * Got race?
2658 * We will need to arrange for the VFS layer to provide an atomic open.
2659 * Until then, this create/open method is prone to inefficiency and race
2660 * conditions due to the lookup, create, and open VFS calls from sys_open()
2661 * placed on the wire.
2662 *
2663 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2664 * The file will be opened again in the subsequent VFS open call
2665 * (nfs4_proc_file_open).
2666 *
2667 * The open for read will just hang around to be used by any process that
2668 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2669 */
2670
2671static int
2672nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2673 int flags, struct nfs_open_context *ctx)
1da177e4 2674{
82a2c1b7 2675 struct dentry *de = dentry;
1da177e4 2676 struct nfs4_state *state;
c0204fd2
TM		 2677 struct rpc_cred *cred = NULL;
2678 fmode_t fmode = 0;
1da177e4
LT		 2679 int status = 0;
2680
c0204fd2
TM		 2681 if (ctx != NULL) {
2682 cred = ctx->cred;
3d4ff43d 2683 de = ctx->dentry;
c0204fd2 2684 fmode = ctx->mode;
1da177e4 2685 }
a8a5da99 2686 sattr->ia_mode &= ~current_umask();
82a2c1b7 2687 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2688 d_drop(dentry);
1da177e4
LT		 2689 if (IS_ERR(state)) {
2690 status = PTR_ERR(state);
c0204fd2 2691 goto out;
1da177e4 2692 }
d4d9cdcb 2693 d_add(dentry, igrab(state->inode));
d75340cc 2694 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2695 if (ctx != NULL)
2696 ctx->state = state;
02a913a7 2697 else
643168c2 2698 nfs4_close_sync(state, fmode);
1da177e4
LT		 2699out:
2700 return status;
2701}
2702
2703static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2704{
16e42959 2705 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2706 struct nfs_removeargs args = {
1da177e4 2707 .fh = NFS_FH(dir),
4fdc17b2
TM		 2708 .name.len = name->len,
2709 .name.name = name->name,
16e42959
TM		 2710 .bitmask = server->attr_bitmask,
2711 };
4fdc17b2 2712 struct nfs_removeres res = {
16e42959 2713 .server = server,
1da177e4 2714 };
1da177e4 2715 struct rpc_message msg = {
4fdc17b2
TM		 2716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2717 .rpc_argp = &args,
2718 .rpc_resp = &res,
1da177e4 2719 };
d346890b
TM		 2720 int status = -ENOMEM;
2721
2722 res.dir_attr = nfs_alloc_fattr();
2723 if (res.dir_attr == NULL)
2724 goto out;
1da177e4 2725
7c513058 2726 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2727 if (status == 0) {
2728 update_changeattr(dir, &res.cinfo);
d346890b 2729 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2730 }
d346890b
TM		 2731 nfs_free_fattr(res.dir_attr);
2732out:
1da177e4
LT		 2733 return status;
2734}
2735
2736static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2737{
2738 struct nfs4_exception exception = { };
2739 int err;
2740 do {
2741 err = nfs4_handle_exception(NFS_SERVER(dir),
2742 _nfs4_proc_remove(dir, name),
2743 &exception);
2744 } while (exception.retry);
2745 return err;
2746}
2747
e4eff1a6 2748static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2749{
e4eff1a6
TM		 2750 struct nfs_server *server = NFS_SERVER(dir);
2751 struct nfs_removeargs *args = msg->rpc_argp;
2752 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2753
a65318bf 2754 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2755 res->server = server;
1da177e4 2756 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2757 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2758}
2759
e4eff1a6 2760static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2761{
e4eff1a6
TM		 2762 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2763
14516c3a
TM		 2764 if (!nfs4_sequence_done(task, &res->seq_res))
2765 return 0;
9e33bed5 2766 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2767 return 0;
2768 update_changeattr(dir, &res->cinfo);
d346890b 2769 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2770 return 1;
1da177e4
LT		 2771}
2772
d3d4152a
JL		 2773static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2774{
2775 struct nfs_server *server = NFS_SERVER(dir);
2776 struct nfs_renameargs *arg = msg->rpc_argp;
2777 struct nfs_renameres *res = msg->rpc_resp;
2778
2779 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2780 arg->bitmask = server->attr_bitmask;
2781 res->server = server;
9d12b216 2782 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2783}
2784
2785static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2786 struct inode *new_dir)
2787{
2788 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2789
2790 if (!nfs4_sequence_done(task, &res->seq_res))
2791 return 0;
2792 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2793 return 0;
2794
2795 update_changeattr(old_dir, &res->old_cinfo);
2796 nfs_post_op_update_inode(old_dir, res->old_fattr);
2797 update_changeattr(new_dir, &res->new_cinfo);
2798 nfs_post_op_update_inode(new_dir, res->new_fattr);
2799 return 1;
2800}
2801
1da177e4
LT		 2802static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2803 struct inode *new_dir, struct qstr *new_name)
2804{
6caf2c82 2805 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2806 struct nfs_renameargs arg = {
1da177e4
LT		 2807 .old_dir = NFS_FH(old_dir),
2808 .new_dir = NFS_FH(new_dir),
2809 .old_name = old_name,
2810 .new_name = new_name,
6caf2c82
TM		 2811 .bitmask = server->attr_bitmask,
2812 };
e8582a8b 2813 struct nfs_renameres res = {
6caf2c82 2814 .server = server,
1da177e4 2815 };
1da177e4
LT		 2816 struct rpc_message msg = {
2817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2818 .rpc_argp = &arg,
2819 .rpc_resp = &res,
2820 };
011fff72 2821 int status = -ENOMEM;
1da177e4 2822
011fff72
TM		 2823 res.old_fattr = nfs_alloc_fattr();
2824 res.new_fattr = nfs_alloc_fattr();
2825 if (res.old_fattr == NULL || res.new_fattr == NULL)
2826 goto out;
1da177e4 2827
7c513058 2828 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2829 if (!status) {
2830 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2831 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2832 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2833 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2834 }
011fff72
TM		 2835out:
2836 nfs_free_fattr(res.new_fattr);
2837 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2838 return status;
2839}
2840
2841static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2842 struct inode *new_dir, struct qstr *new_name)
2843{
2844 struct nfs4_exception exception = { };
2845 int err;
2846 do {
2847 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2848 _nfs4_proc_rename(old_dir, old_name,
2849 new_dir, new_name),
2850 &exception);
2851 } while (exception.retry);
2852 return err;
2853}
2854
2855static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2856{
91ba2eee 2857 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2858 struct nfs4_link_arg arg = {
2859 .fh = NFS_FH(inode),
2860 .dir_fh = NFS_FH(dir),
2861 .name = name,
91ba2eee
TM		 2862 .bitmask = server->attr_bitmask,
2863 };
91ba2eee
TM		 2864 struct nfs4_link_res res = {
2865 .server = server,
1da177e4 2866 };
1da177e4
LT		 2867 struct rpc_message msg = {
2868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2869 .rpc_argp = &arg,
91ba2eee 2870 .rpc_resp = &res,
1da177e4 2871 };
136f2627
TM		 2872 int status = -ENOMEM;
2873
2874 res.fattr = nfs_alloc_fattr();
2875 res.dir_attr = nfs_alloc_fattr();
2876 if (res.fattr == NULL || res.dir_attr == NULL)
2877 goto out;
1da177e4 2878
7c513058 2879 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2880 if (!status) {
2881 update_changeattr(dir, &res.cinfo);
2882 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2883 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2884 }
136f2627
TM		 2885out:
2886 nfs_free_fattr(res.dir_attr);
2887 nfs_free_fattr(res.fattr);
1da177e4
LT		 2888 return status;
2889}
2890
2891static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2892{
2893 struct nfs4_exception exception = { };
2894 int err;
2895 do {
2896 err = nfs4_handle_exception(NFS_SERVER(inode),
2897 _nfs4_proc_link(inode, dir, name),
2898 &exception);
2899 } while (exception.retry);
2900 return err;
2901}
2902
57dc9a57
TM		 2903struct nfs4_createdata {
2904 struct rpc_message msg;
2905 struct nfs4_create_arg arg;
2906 struct nfs4_create_res res;
2907 struct nfs_fh fh;
2908 struct nfs_fattr fattr;
2909 struct nfs_fattr dir_fattr;
2910};
2911
2912static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2913 struct qstr *name, struct iattr *sattr, u32 ftype)
2914{
2915 struct nfs4_createdata *data;
2916
2917 data = kzalloc(sizeof(*data), GFP_KERNEL);
2918 if (data != NULL) {
2919 struct nfs_server *server = NFS_SERVER(dir);
2920
2921 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2922 data->msg.rpc_argp = &data->arg;
2923 data->msg.rpc_resp = &data->res;
2924 data->arg.dir_fh = NFS_FH(dir);
2925 data->arg.server = server;
2926 data->arg.name = name;
2927 data->arg.attrs = sattr;
2928 data->arg.ftype = ftype;
2929 data->arg.bitmask = server->attr_bitmask;
2930 data->res.server = server;
2931 data->res.fh = &data->fh;
2932 data->res.fattr = &data->fattr;
2933 data->res.dir_fattr = &data->dir_fattr;
2934 nfs_fattr_init(data->res.fattr);
2935 nfs_fattr_init(data->res.dir_fattr);
2936 }
2937 return data;
2938}
2939
2940static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2941{
7c513058 2942 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2943 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2944 if (status == 0) {
2945 update_changeattr(dir, &data->res.dir_cinfo);
2946 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2947 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2948 }
2949 return status;
2950}
2951
2952static void nfs4_free_createdata(struct nfs4_createdata *data)
2953{
2954 kfree(data);
2955}
2956
4f390c15 2957static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2958 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2959{
57dc9a57
TM		 2960 struct nfs4_createdata *data;
2961 int status = -ENAMETOOLONG;
1da177e4 2962
94a6d753 2963 if (len > NFS4_MAXPATHLEN)
57dc9a57 2964 goto out;
4f390c15 2965
57dc9a57
TM		 2966 status = -ENOMEM;
2967 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2968 if (data == NULL)
2969 goto out;
2970
2971 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2972 data->arg.u.symlink.pages = &page;
2973 data->arg.u.symlink.len = len;
1da177e4 2974
57dc9a57
TM		 2975 status = nfs4_do_create(dir, dentry, data);
2976
2977 nfs4_free_createdata(data);
2978out:
1da177e4
LT		 2979 return status;
2980}
2981
4f390c15 2982static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2983 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2984{
2985 struct nfs4_exception exception = { };
2986 int err;
2987 do {
2988 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2989 _nfs4_proc_symlink(dir, dentry, page,
2990 len, sattr),
1da177e4
LT		 2991 &exception);
2992 } while (exception.retry);
2993 return err;
2994}
2995
2996static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2997 struct iattr *sattr)
2998{
57dc9a57
TM		 2999 struct nfs4_createdata *data;
3000 int status = -ENOMEM;
1da177e4 3001
57dc9a57
TM		 3002 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3003 if (data == NULL)
3004 goto out;
3005
3006 status = nfs4_do_create(dir, dentry, data);
3007
3008 nfs4_free_createdata(data);
3009out:
1da177e4
LT		 3010 return status;
3011}
3012
3013static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3014 struct iattr *sattr)
3015{
3016 struct nfs4_exception exception = { };
3017 int err;
a8a5da99
AK		 3018
3019 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3020 do {
3021 err = nfs4_handle_exception(NFS_SERVER(dir),
3022 _nfs4_proc_mkdir(dir, dentry, sattr),
3023 &exception);
3024 } while (exception.retry);
3025 return err;
3026}
3027
3028static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3029 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3030{
3031 struct inode *dir = dentry->d_inode;
3032 struct nfs4_readdir_arg args = {
3033 .fh = NFS_FH(dir),
56e4ebf8 3034 .pages = pages,
1da177e4
LT		 3035 .pgbase = 0,
3036 .count = count,
96d25e53 3037 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3038 .plus = plus,
1da177e4
LT		 3039 };
3040 struct nfs4_readdir_res res;
3041 struct rpc_message msg = {
3042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3043 .rpc_argp = &args,
3044 .rpc_resp = &res,
3045 .rpc_cred = cred,
3046 };
3047 int status;
3048
3110ff80 3049 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3050 dentry->d_parent->d_name.name,
3051 dentry->d_name.name,
3052 (unsigned long long)cookie);
1da177e4
LT		 3053 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3054 res.pgbase = args.pgbase;
7c513058 3055 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3056 if (status >= 0) {
1da177e4 3057 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3058 status += args.pgbase;
3059 }
c4812998
TM		 3060
3061 nfs_invalidate_atime(dir);
3062
3110ff80 3063 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3064 return status;
3065}
3066
3067static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3068 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3069{
3070 struct nfs4_exception exception = { };
3071 int err;
3072 do {
3073 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3074 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3075 pages, count, plus),
1da177e4
LT		 3076 &exception);
3077 } while (exception.retry);
3078 return err;
3079}
3080
3081static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3082 struct iattr *sattr, dev_t rdev)
3083{
57dc9a57
TM		 3084 struct nfs4_createdata *data;
3085 int mode = sattr->ia_mode;
3086 int status = -ENOMEM;
1da177e4
LT		 3087
3088 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3089 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3090
3091 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3092 if (data == NULL)
3093 goto out;
3094
1da177e4 3095 if (S_ISFIFO(mode))
57dc9a57 3096 data->arg.ftype = NF4FIFO;
1da177e4 3097 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3098 data->arg.ftype = NF4BLK;
3099 data->arg.u.device.specdata1 = MAJOR(rdev);
3100 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3101 }
3102 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3103 data->arg.ftype = NF4CHR;
3104 data->arg.u.device.specdata1 = MAJOR(rdev);
3105 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3106 }
1da177e4 3107
57dc9a57
TM		 3108 status = nfs4_do_create(dir, dentry, data);
3109
3110 nfs4_free_createdata(data);
3111out:
1da177e4
LT		 3112 return status;
3113}
3114
3115static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3116 struct iattr *sattr, dev_t rdev)
3117{
3118 struct nfs4_exception exception = { };
3119 int err;
a8a5da99
AK		 3120
3121 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3122 do {
3123 err = nfs4_handle_exception(NFS_SERVER(dir),
3124 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3125 &exception);
3126 } while (exception.retry);
3127 return err;
3128}
3129
3130static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3131 struct nfs_fsstat *fsstat)
3132{
3133 struct nfs4_statfs_arg args = {
3134 .fh = fhandle,
3135 .bitmask = server->attr_bitmask,
3136 };
24ad148a
BH		 3137 struct nfs4_statfs_res res = {
3138 .fsstat = fsstat,
3139 };
1da177e4
LT		 3140 struct rpc_message msg = {
3141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3142 .rpc_argp = &args,
24ad148a 3143 .rpc_resp = &res,
1da177e4
LT		 3144 };
3145
0e574af1 3146 nfs_fattr_init(fsstat->fattr);
7c513058 3147 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3148}
3149
3150static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3151{
3152 struct nfs4_exception exception = { };
3153 int err;
3154 do {
3155 err = nfs4_handle_exception(server,
3156 _nfs4_proc_statfs(server, fhandle, fsstat),
3157 &exception);
3158 } while (exception.retry);
3159 return err;
3160}
3161
3162static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3163 struct nfs_fsinfo *fsinfo)
3164{
3165 struct nfs4_fsinfo_arg args = {
3166 .fh = fhandle,
3167 .bitmask = server->attr_bitmask,
3168 };
3dda5e43
BH		 3169 struct nfs4_fsinfo_res res = {
3170 .fsinfo = fsinfo,
3171 };
1da177e4
LT		 3172 struct rpc_message msg = {
3173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3174 .rpc_argp = &args,
3dda5e43 3175 .rpc_resp = &res,
1da177e4
LT		 3176 };
3177
7c513058 3178 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3179}
3180
3181static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3182{
3183 struct nfs4_exception exception = { };
3184 int err;
3185
3186 do {
3187 err = nfs4_handle_exception(server,
3188 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3189 &exception);
3190 } while (exception.retry);
3191 return err;
3192}
3193
3194static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3195{
0e574af1 3196 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3197 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3198}
3199
3200static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3201 struct nfs_pathconf *pathconf)
3202{
3203 struct nfs4_pathconf_arg args = {
3204 .fh = fhandle,
3205 .bitmask = server->attr_bitmask,
3206 };
d45b2989
BH		 3207 struct nfs4_pathconf_res res = {
3208 .pathconf = pathconf,
3209 };
1da177e4
LT		 3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3212 .rpc_argp = &args,
d45b2989 3213 .rpc_resp = &res,
1da177e4
LT		 3214 };
3215
3216 /* None of the pathconf attributes are mandatory to implement */
3217 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3218 memset(pathconf, 0, sizeof(*pathconf));
3219 return 0;
3220 }
3221
0e574af1 3222 nfs_fattr_init(pathconf->fattr);
7c513058 3223 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3224}
3225
3226static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3227 struct nfs_pathconf *pathconf)
3228{
3229 struct nfs4_exception exception = { };
3230 int err;
3231
3232 do {
3233 err = nfs4_handle_exception(server,
3234 _nfs4_proc_pathconf(server, fhandle, pathconf),
3235 &exception);
3236 } while (exception.retry);
3237 return err;
3238}
3239
d20581aa
BH		 3240void __nfs4_read_done_cb(struct nfs_read_data *data)
3241{
3242 nfs_invalidate_atime(data->inode);
3243}
3244
cbdabc7f 3245static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3246{
ec06c096 3247 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3248
9e33bed5 3249 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3250 rpc_restart_call_prepare(task);
ec06c096 3251 return -EAGAIN;
1da177e4 3252 }
8850df99 3253
d20581aa 3254 __nfs4_read_done_cb(data);
1da177e4 3255 if (task->tk_status > 0)
ec06c096
TM		 3256 renew_lease(server, data->timestamp);
3257 return 0;
1da177e4
LT		 3258}
3259
cbdabc7f
AA		 3260static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3261{
3262
3263 dprintk("--> %s\n", __func__);
3264
3265 if (!nfs4_sequence_done(task, &data->res.seq_res))
3266 return -EAGAIN;
3267
d20581aa
BH		 3268 return data->read_done_cb ? data->read_done_cb(task, data) :
3269 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3270}
3271
bdc7f021 3272static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3273{
1da177e4 3274 data->timestamp = jiffies;
cbdabc7f 3275 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3276 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3277 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3278}
3279
cbdabc7f
AA		 3280/* Reset the the nfs_read_data to send the read to the MDS. */
3281void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3282{
3283 dprintk("%s Reset task for i/o through\n", __func__);
3284 put_lseg(data->lseg);
3285 data->lseg = NULL;
3286 /* offsets will differ in the dense stripe case */
3287 data->args.offset = data->mds_offset;
3288 data->ds_clp = NULL;
3289 data->args.fh = NFS_FH(data->inode);
3290 data->read_done_cb = nfs4_read_done_cb;
3291 task->tk_ops = data->mds_ops;
3292 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3293}
3294EXPORT_SYMBOL_GPL(nfs4_reset_read);
3295
b029bc9b 3296static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3297{
1da177e4
LT		 3298 struct inode *inode = data->inode;
3299
9e33bed5 3300 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3301 rpc_restart_call_prepare(task);
788e7a89 3302 return -EAGAIN;
1da177e4 3303 }
4f9838c7 3304 if (task->tk_status >= 0) {
1da177e4 3305 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3306 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3307 }
788e7a89 3308 return 0;
1da177e4
LT		 3309}
3310
b029bc9b
FI		 3311static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3312{
3313 if (!nfs4_sequence_done(task, &data->res.seq_res))
3314 return -EAGAIN;
d20581aa
BH		 3315 return data->write_done_cb ? data->write_done_cb(task, data) :
3316 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3317}
3318
a69aef14
FI		 3319/* Reset the the nfs_write_data to send the write to the MDS. */
3320void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3321{
3322 dprintk("%s Reset task for i/o through\n", __func__);
3323 put_lseg(data->lseg);
3324 data->lseg = NULL;
3325 data->ds_clp = NULL;
3326 data->write_done_cb = nfs4_write_done_cb;
3327 data->args.fh = NFS_FH(data->inode);
3328 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3329 data->args.offset = data->mds_offset;
3330 data->res.fattr = &data->fattr;
3331 task->tk_ops = data->mds_ops;
3332 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3333}
3334EXPORT_SYMBOL_GPL(nfs4_reset_write);
3335
bdc7f021 3336static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3337{
bdc7f021
TM		 3338 struct nfs_server *server = NFS_SERVER(data->inode);
3339
7ffd1064
FI		 3340 if (data->lseg) {
3341 data->args.bitmask = NULL;
3342 data->res.fattr = NULL;
3343 } else
3344 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3345 if (!data->write_done_cb)
3346 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3347 data->res.server = server;
1da177e4
LT		 3348 data->timestamp = jiffies;
3349
bdc7f021 3350 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3351 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3352}
3353
5f452431 3354static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3355{
1da177e4 3356 struct inode *inode = data->inode;
14516c3a 3357
9e33bed5 3358 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3359 rpc_restart_call_prepare(task);
788e7a89 3360 return -EAGAIN;
1da177e4 3361 }
9e08a3c5 3362 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3363 return 0;
1da177e4
LT		 3364}
3365
5f452431
FI		 3366static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3367{
3368 if (!nfs4_sequence_done(task, &data->res.seq_res))
3369 return -EAGAIN;
3370 return data->write_done_cb(task, data);
3371}
3372
bdc7f021 3373static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3374{
788e7a89 3375 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3376
3377 if (data->lseg) {
3378 data->args.bitmask = NULL;
3379 data->res.fattr = NULL;
3380 } else
3381 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3382 if (!data->write_done_cb)
3383 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3384 data->res.server = server;
bdc7f021 3385 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3386 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3387}
3388
9bc4e3ca
CL		 3389struct nfs4_renewdata {
3390 struct nfs_client *client;
3391 unsigned long timestamp;
3392};
3393
1da177e4
LT		 3394/*
3395 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3396 * standalone procedure for queueing an asynchronous RENEW.
3397 */
9bc4e3ca 3398static void nfs4_renew_release(void *calldata)
dc96aef9 3399{
9bc4e3ca
CL		 3400 struct nfs4_renewdata *data = calldata;
3401 struct nfs_client *clp = data->client;
dc96aef9 3402
0851de06
AB		 3403 if (atomic_read(&clp->cl_count) > 1)
3404 nfs4_schedule_state_renewal(clp);
3405 nfs_put_client(clp);
9bc4e3ca 3406 kfree(data);
dc96aef9
AB		 3407}
3408
9bc4e3ca 3409static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3410{
9bc4e3ca
CL		 3411 struct nfs4_renewdata *data = calldata;
3412 struct nfs_client *clp = data->client;
3413 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3414
3415 if (task->tk_status < 0) {
95baa25c 3416 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3417 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3418 return;
3419 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3420 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3421 return;
3422 }
3423 nfs4_schedule_path_down_recovery(clp);
1da177e4 3424 }
452e9352 3425 do_renew_lease(clp, timestamp);
1da177e4
LT		 3426}
3427
963d8fe5
TM		 3428static const struct rpc_call_ops nfs4_renew_ops = {
3429 .rpc_call_done = nfs4_renew_done,
dc96aef9 3430 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3431};
3432
2f60ea6b 3433static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3434{
3435 struct rpc_message msg = {
3436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3437 .rpc_argp = clp,
b4454fe1 3438 .rpc_cred = cred,
1da177e4 3439 };
9bc4e3ca 3440 struct nfs4_renewdata *data;
1da177e4 3441
2f60ea6b
TM		 3442 if (renew_flags == 0)
3443 return 0;
0851de06
AB		 3444 if (!atomic_inc_not_zero(&clp->cl_count))
3445 return -EIO;
b569ad34 3446 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3447 if (data == NULL)
3448 return -ENOMEM;
3449 data->client = clp;
3450 data->timestamp = jiffies;
1da177e4 3451 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3452 &nfs4_renew_ops, data);
1da177e4
LT		 3453}
3454
8534d4ec 3455static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3456{
3457 struct rpc_message msg = {
3458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3459 .rpc_argp = clp,
b4454fe1 3460 .rpc_cred = cred,
1da177e4
LT		 3461 };
3462 unsigned long now = jiffies;
3463 int status;
3464
3465 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3466 if (status < 0)
3467 return status;
452e9352 3468 do_renew_lease(clp, now);
1da177e4
LT		 3469 return 0;
3470}
3471
aa1870af
BF		 3472static inline int nfs4_server_supports_acls(struct nfs_server *server)
3473{
3474 return (server->caps & NFS_CAP_ACLS)
3475 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3476 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3477}
3478
3479/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3480 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3481 * the stack.
3482 */
3483#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3484
e9e3d724
NH		 3485static int buf_to_pages_noslab(const void *buf, size_t buflen,
3486 struct page **pages, unsigned int *pgbase)
3487{
3488 struct page *newpage, **spages;
3489 int rc = 0;
3490 size_t len;
3491 spages = pages;
3492
3493 do {
43b7c3f0 3494 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3495 newpage = alloc_page(GFP_KERNEL);
3496
3497 if (newpage == NULL)
3498 goto unwind;
3499 memcpy(page_address(newpage), buf, len);
3500 buf += len;
3501 buflen -= len;
3502 *pages++ = newpage;
3503 rc++;
3504 } while (buflen != 0);
3505
3506 return rc;
3507
3508unwind:
3509 for(; rc > 0; rc--)
3510 __free_page(spages[rc-1]);
3511 return -ENOMEM;
3512}
3513
e50a1c2e
BF		 3514struct nfs4_cached_acl {
3515 int cached;
3516 size_t len;
3e9d4154 3517 char data[0];
e50a1c2e
BF		 3518};
3519
3520static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3521{
3522 struct nfs_inode *nfsi = NFS_I(inode);
3523
3524 spin_lock(&inode->i_lock);
3525 kfree(nfsi->nfs4_acl);
3526 nfsi->nfs4_acl = acl;
3527 spin_unlock(&inode->i_lock);
3528}
3529
3530static void nfs4_zap_acl_attr(struct inode *inode)
3531{
3532 nfs4_set_cached_acl(inode, NULL);
3533}
3534
3535static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3536{
3537 struct nfs_inode *nfsi = NFS_I(inode);
3538 struct nfs4_cached_acl *acl;
3539 int ret = -ENOENT;
3540
3541 spin_lock(&inode->i_lock);
3542 acl = nfsi->nfs4_acl;
3543 if (acl == NULL)
3544 goto out;
3545 if (buf == NULL) /* user is just asking for length */
3546 goto out_len;
3547 if (acl->cached == 0)
3548 goto out;
3549 ret = -ERANGE; /* see getxattr(2) man page */
3550 if (acl->len > buflen)
3551 goto out;
3552 memcpy(buf, acl->data, acl->len);
3553out_len:
3554 ret = acl->len;
3555out:
3556 spin_unlock(&inode->i_lock);
3557 return ret;
3558}
3559
3560static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3561{
3562 struct nfs4_cached_acl *acl;
3563
3564 if (buf && acl_len <= PAGE_SIZE) {
3565 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3566 if (acl == NULL)
3567 goto out;
3568 acl->cached = 1;
3569 memcpy(acl->data, buf, acl_len);
3570 } else {
3571 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3572 if (acl == NULL)
3573 goto out;
3574 acl->cached = 0;
3575 }
3576 acl->len = acl_len;
3577out:
3578 nfs4_set_cached_acl(inode, acl);
3579}
3580
bf118a34
AA		 3581/*
3582 * The getxattr API returns the required buffer length when called with a
3583 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3584 * the required buf. On a NULL buf, we send a page of data to the server
3585 * guessing that the ACL request can be serviced by a page. If so, we cache
3586 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3587 * the cache. If not so, we throw away the page, and cache the required
3588 * length. The next getxattr call will then produce another round trip to
3589 * the server, this time with the input buf of the required size.
3590 */
16b4289c 3591static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3592{
bf118a34 3593 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3594 struct nfs_getaclargs args = {
3595 .fh = NFS_FH(inode),
3596 .acl_pages = pages,
3597 .acl_len = buflen,
3598 };
663c79b3
BH		 3599 struct nfs_getaclres res = {
3600 .acl_len = buflen,
3601 };
e50a1c2e 3602 void *resp_buf;
aa1870af
BF		 3603 struct rpc_message msg = {
3604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3605 .rpc_argp = &args,
663c79b3 3606 .rpc_resp = &res,
aa1870af 3607 };
bf118a34 3608 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3609
bf118a34
AA		 3610 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3611 /* As long as we're doing a round trip to the server anyway,
3612 * let's be prepared for a page of acl data. */
3613 if (npages == 0)
3614 npages = 1;
3615
3616 for (i = 0; i < npages; i++) {
3617 pages[i] = alloc_page(GFP_KERNEL);
3618 if (!pages[i])
3619 goto out_free;
e50a1c2e 3620 }
bf118a34
AA		 3621 if (npages > 1) {
3622 /* for decoding across pages */
3623 args.acl_scratch = alloc_page(GFP_KERNEL);
3624 if (!args.acl_scratch)
3625 goto out_free;
e50a1c2e 3626 }
bf118a34
AA		 3627 args.acl_len = npages * PAGE_SIZE;
3628 args.acl_pgbase = 0;
3629 /* Let decode_getfacl know not to fail if the ACL data is larger than
3630 * the page we send as a guess */
3631 if (buf == NULL)
3632 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3633 resp_buf = page_address(pages[0]);
3634
de040bec 3635 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3636 __func__, buf, buflen, npages, args.acl_len);
3637 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3638 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3639 if (ret)
3640 goto out_free;
bf118a34
AA		 3641
3642 acl_len = res.acl_len - res.acl_data_offset;
3643 if (acl_len > args.acl_len)
3644 nfs4_write_cached_acl(inode, NULL, acl_len);
e50a1c2e 3645 else
bf118a34
AA		 3646 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3647 acl_len);
e50a1c2e
BF		 3648 if (buf) {
3649 ret = -ERANGE;
bf118a34 3650 if (acl_len > buflen)
e50a1c2e 3651 goto out_free;
bf118a34
AA		 3652 _copy_from_pages(buf, pages, res.acl_data_offset,
3653 res.acl_len);
e50a1c2e 3654 }
bf118a34 3655 ret = acl_len;
e50a1c2e 3656out_free:
bf118a34
AA		 3657 for (i = 0; i < npages; i++)
3658 if (pages[i])
3659 __free_page(pages[i]);
3660 if (args.acl_scratch)
3661 __free_page(args.acl_scratch);
aa1870af
BF		 3662 return ret;
3663}
3664
16b4289c
TM		 3665static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3666{
3667 struct nfs4_exception exception = { };
3668 ssize_t ret;
3669 do {
3670 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3671 if (ret >= 0)
3672 break;
3673 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3674 } while (exception.retry);
3675 return ret;
3676}
3677
e50a1c2e
BF		 3678static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3679{
3680 struct nfs_server *server = NFS_SERVER(inode);
3681 int ret;
3682
3683 if (!nfs4_server_supports_acls(server))
3684 return -EOPNOTSUPP;
3685 ret = nfs_revalidate_inode(server, inode);
3686 if (ret < 0)
3687 return ret;
08a22b39
AK		 3688 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3689 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3690 ret = nfs4_read_cached_acl(inode, buf, buflen);
3691 if (ret != -ENOENT)
bf118a34
AA		 3692 /* -ENOENT is returned if there is no ACL or if there is an ACL
3693 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3694 return ret;
3695 return nfs4_get_acl_uncached(inode, buf, buflen);
3696}
3697
16b4289c 3698static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3699{
3700 struct nfs_server *server = NFS_SERVER(inode);
3701 struct page *pages[NFS4ACL_MAXPAGES];
3702 struct nfs_setaclargs arg = {
3703 .fh = NFS_FH(inode),
3704 .acl_pages = pages,
3705 .acl_len = buflen,
3706 };
73c403a9 3707 struct nfs_setaclres res;
4b580ee3
BF		 3708 struct rpc_message msg = {
3709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3710 .rpc_argp = &arg,
73c403a9 3711 .rpc_resp = &res,
4b580ee3 3712 };
e9e3d724 3713 int ret, i;
4b580ee3
BF		 3714
3715 if (!nfs4_server_supports_acls(server))
3716 return -EOPNOTSUPP;
e9e3d724
NH		 3717 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3718 if (i < 0)
3719 return i;
642ac549 3720 nfs_inode_return_delegation(inode);
7c513058 3721 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3722
3723 /*
3724 * Free each page after tx, so the only ref left is
3725 * held by the network stack
3726 */
3727 for (; i > 0; i--)
3728 put_page(pages[i-1]);
3729
08a22b39
AK		 3730 /*
3731 * Acl update can result in inode attribute update.
3732 * so mark the attribute cache invalid.
3733 */
3734 spin_lock(&inode->i_lock);
3735 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3736 spin_unlock(&inode->i_lock);
f41f7418
TM		 3737 nfs_access_zap_cache(inode);
3738 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3739 return ret;
3740}
3741
16b4289c
TM		 3742static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3743{
3744 struct nfs4_exception exception = { };
3745 int err;
3746 do {
3747 err = nfs4_handle_exception(NFS_SERVER(inode),
3748 __nfs4_proc_set_acl(inode, buf, buflen),
3749 &exception);
3750 } while (exception.retry);
3751 return err;
3752}
3753
1da177e4 3754static int
aa5190d0 3755nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3756{
aa5190d0
TM		 3757 struct nfs_client *clp = server->nfs_client;
3758
3759 if (task->tk_status >= 0)
1da177e4
LT		 3760 return 0;
3761 switch(task->tk_status) {
9e33bed5
TM		 3762 case -NFS4ERR_ADMIN_REVOKED:
3763 case -NFS4ERR_BAD_STATEID:
3764 case -NFS4ERR_OPENMODE:
3765 if (state == NULL)
3766 break;
0400a6b0
TM		 3767 nfs4_schedule_stateid_recovery(server, state);
3768 goto wait_on_recovery;
0ced63d1
TM		 3769 case -NFS4ERR_EXPIRED:
3770 if (state != NULL)
3771 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3772 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3773 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3774 nfs4_schedule_lease_recovery(clp);
3775 goto wait_on_recovery;
4745e315
AA		 3776#if defined(CONFIG_NFS_V4_1)
3777 case -NFS4ERR_BADSESSION:
3778 case -NFS4ERR_BADSLOT:
3779 case -NFS4ERR_BAD_HIGH_SLOT:
3780 case -NFS4ERR_DEADSESSION:
3781 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3782 case -NFS4ERR_SEQ_FALSE_RETRY:
3783 case -NFS4ERR_SEQ_MISORDERED:
3784 dprintk("%s ERROR %d, Reset session\n", __func__,
3785 task->tk_status);
0400a6b0 3786 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3787 task->tk_status = 0;
3788 return -EAGAIN;
3789#endif /* CONFIG_NFS_V4_1 */
1da177e4 3790 case -NFS4ERR_DELAY:
aa5190d0 3791 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3792 case -NFS4ERR_GRACE:
2c643488 3793 case -EKEYEXPIRED:
1da177e4
LT		 3794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3795 task->tk_status = 0;
3796 return -EAGAIN;
a8a4ae3a 3797 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3798 case -NFS4ERR_OLD_STATEID:
3799 task->tk_status = 0;
3800 return -EAGAIN;
3801 }
3802 task->tk_status = nfs4_map_errors(task->tk_status);
3803 return 0;
0400a6b0 3804wait_on_recovery:
a2c0b9e2 3805 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3806 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3807 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3808 task->tk_status = 0;
3809 return -EAGAIN;
1da177e4
LT		 3810}
3811
bb8b27e5
TM		 3812int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3813 unsigned short port, struct rpc_cred *cred,
3814 struct nfs4_setclientid_res *res)
1da177e4
LT		 3815{
3816 nfs4_verifier sc_verifier;
3817 struct nfs4_setclientid setclientid = {
3818 .sc_verifier = &sc_verifier,
3819 .sc_prog = program,
f4eecd5d 3820 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3821 };
3822 struct rpc_message msg = {
3823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3824 .rpc_argp = &setclientid,
bb8b27e5 3825 .rpc_resp = res,
286d7d6a 3826 .rpc_cred = cred,
1da177e4 3827 };
bc4785cd 3828 __be32 *p;
1da177e4
LT		 3829 int loop = 0;
3830 int status;
3831
bc4785cd 3832 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3833 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3834 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3835
3836 for(;;) {
2446ab60 3837 rcu_read_lock();
1da177e4 3838 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3839 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3840 clp->cl_ipaddr,
3841 rpc_peeraddr2str(clp->cl_rpcclient,
3842 RPC_DISPLAY_ADDR),
69dd716c
TM		 3843 rpc_peeraddr2str(clp->cl_rpcclient,
3844 RPC_DISPLAY_PROTO),
78ea323b 3845 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3846 clp->cl_id_uniquifier);
3847 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3848 sizeof(setclientid.sc_netid),
3849 rpc_peeraddr2str(clp->cl_rpcclient,
3850 RPC_DISPLAY_NETID));
1da177e4 3851 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3852 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 3853 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 3854 rcu_read_unlock();
1da177e4 3855
1bd714f2 3856 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3857 if (status != -NFS4ERR_CLID_INUSE)
3858 break;
fd954ae1
TM		 3859 if (loop != 0) {
3860 ++clp->cl_id_uniquifier;
1da177e4 3861 break;
fd954ae1
TM		 3862 }
3863 ++loop;
3864 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3865 }
3866 return status;
3867}
3868
fd954ae1 3869int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3870 struct nfs4_setclientid_res *arg,
3871 struct rpc_cred *cred)
1da177e4
LT		 3872{
3873 struct nfs_fsinfo fsinfo;
3874 struct rpc_message msg = {
3875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3876 .rpc_argp = arg,
1da177e4 3877 .rpc_resp = &fsinfo,
286d7d6a 3878 .rpc_cred = cred,
1da177e4
LT		 3879 };
3880 unsigned long now;
3881 int status;
3882
3883 now = jiffies;
1bd714f2 3884 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3885 if (status == 0) {
3886 spin_lock(&clp->cl_lock);
3887 clp->cl_lease_time = fsinfo.lease_time * HZ;
3888 clp->cl_last_renewal = now;
3889 spin_unlock(&clp->cl_lock);
3890 }
3891 return status;
3892}
3893
fe650407
TM		 3894struct nfs4_delegreturndata {
3895 struct nfs4_delegreturnargs args;
fa178f29 3896 struct nfs4_delegreturnres res;
fe650407
TM		 3897 struct nfs_fh fh;
3898 nfs4_stateid stateid;
26e976a8 3899 unsigned long timestamp;
fa178f29 3900 struct nfs_fattr fattr;
fe650407
TM		 3901 int rpc_status;
3902};
3903
fe650407
TM		 3904static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3905{
3906 struct nfs4_delegreturndata *data = calldata;
938e1010 3907
14516c3a
TM		 3908 if (!nfs4_sequence_done(task, &data->res.seq_res))
3909 return;
938e1010 3910
79708861
RL		 3911 switch (task->tk_status) {
3912 case -NFS4ERR_STALE_STATEID:
3913 case -NFS4ERR_EXPIRED:
3914 case 0:
fa178f29 3915 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3916 break;
3917 default:
3918 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3919 -EAGAIN) {
d00c5d43 3920 rpc_restart_call_prepare(task);
79708861
RL		 3921 return;
3922 }
3923 }
3924 data->rpc_status = task->tk_status;
fe650407
TM		 3925}
3926
3927static void nfs4_delegreturn_release(void *calldata)
3928{
fe650407
TM		 3929 kfree(calldata);
3930}
3931
938e1010
AA		 3932#if defined(CONFIG_NFS_V4_1)
3933static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3934{
3935 struct nfs4_delegreturndata *d_data;
3936
3937 d_data = (struct nfs4_delegreturndata *)data;
3938
035168ab 3939 if (nfs4_setup_sequence(d_data->res.server,
938e1010 3940 &d_data->args.seq_args,
9d12b216 3941 &d_data->res.seq_res, task))
938e1010
AA		 3942 return;
3943 rpc_call_start(task);
3944}
3945#endif /* CONFIG_NFS_V4_1 */
3946
c8d149f3 3947static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3948#if defined(CONFIG_NFS_V4_1)
3949 .rpc_call_prepare = nfs4_delegreturn_prepare,
3950#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3951 .rpc_call_done = nfs4_delegreturn_done,
3952 .rpc_release = nfs4_delegreturn_release,
3953};
3954
e6f81075 3955static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3956{
3957 struct nfs4_delegreturndata *data;
fa178f29 3958 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3959 struct rpc_task *task;
5138fde0
TM		 3960 struct rpc_message msg = {
3961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3962 .rpc_cred = cred,
3963 };
c970aa85
TM		 3964 struct rpc_task_setup task_setup_data = {
3965 .rpc_client = server->client,
5138fde0 3966 .rpc_message = &msg,
c970aa85
TM		 3967 .callback_ops = &nfs4_delegreturn_ops,
3968 .flags = RPC_TASK_ASYNC,
3969 };
e6f81075 3970 int status = 0;
fe650407 3971
8535b2be 3972 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3973 if (data == NULL)
3974 return -ENOMEM;
9d12b216 3975 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 3976 data->args.fhandle = &data->fh;
3977 data->args.stateid = &data->stateid;
fa178f29 3978 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3979 nfs_copy_fh(&data->fh, NFS_FH(inode));
3980 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3981 data->res.fattr = &data->fattr;
3982 data->res.server = server;
5138fde0 3983 nfs_fattr_init(data->res.fattr);
26e976a8 3984 data->timestamp = jiffies;
fe650407
TM		 3985 data->rpc_status = 0;
3986
c970aa85 3987 task_setup_data.callback_data = data;
1174dd1f
TM		 3988 msg.rpc_argp = &data->args;
3989 msg.rpc_resp = &data->res;
c970aa85 3990 task = rpc_run_task(&task_setup_data);
7a1218a2 3991 if (IS_ERR(task))
fe650407 3992 return PTR_ERR(task);
e6f81075
TM		 3993 if (!issync)
3994 goto out;
fe650407 3995 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3996 if (status != 0)
3997 goto out;
3998 status = data->rpc_status;
3999 if (status != 0)
4000 goto out;
4001 nfs_refresh_inode(inode, &data->fattr);
4002out:
e6b3c4db 4003 rpc_put_task(task);
fe650407 4004 return status;
1da177e4
LT		 4005}
4006
e6f81075 4007int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4008{
4009 struct nfs_server *server = NFS_SERVER(inode);
4010 struct nfs4_exception exception = { };
4011 int err;
4012 do {
e6f81075 4013 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4014 switch (err) {
4015 case -NFS4ERR_STALE_STATEID:
4016 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4017 case 0:
4018 return 0;
4019 }
4020 err = nfs4_handle_exception(server, err, &exception);
4021 } while (exception.retry);
4022 return err;
4023}
4024
4025#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4026#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4027
4028/*
4029 * sleep, with exponential backoff, and retry the LOCK operation.
4030 */
4031static unsigned long
4032nfs4_set_lock_task_retry(unsigned long timeout)
4033{
d310310c 4034 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4035 timeout <<= 1;
4036 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4037 return NFS4_LOCK_MAXTIMEOUT;
4038 return timeout;
4039}
4040
1da177e4
LT		 4041static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4042{
4043 struct inode *inode = state->inode;
4044 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4045 struct nfs_client *clp = server->nfs_client;
911d1aaf 4046 struct nfs_lockt_args arg = {
1da177e4 4047 .fh = NFS_FH(inode),
911d1aaf 4048 .fl = request,
1da177e4 4049 };
911d1aaf
TM		 4050 struct nfs_lockt_res res = {
4051 .denied = request,
1da177e4
LT		 4052 };
4053 struct rpc_message msg = {
4054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4055 .rpc_argp = &arg,
4056 .rpc_resp = &res,
4057 .rpc_cred = state->owner->so_cred,
4058 };
1da177e4
LT		 4059 struct nfs4_lock_state *lsp;
4060 int status;
4061
911d1aaf 4062 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4063 status = nfs4_set_lock_state(state, request);
4064 if (status != 0)
4065 goto out;
4066 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4067 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4068 arg.lock_owner.s_dev = server->s_dev;
7c513058 4069 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4070 switch (status) {
4071 case 0:
4072 request->fl_type = F_UNLCK;
4073 break;
4074 case -NFS4ERR_DENIED:
4075 status = 0;
1da177e4 4076 }
70cc6487 4077 request->fl_ops->fl_release_private(request);
8d0a8a9d 4078out:
1da177e4
LT		 4079 return status;
4080}
4081
4082static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4083{
4084 struct nfs4_exception exception = { };
4085 int err;
4086
4087 do {
4088 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4089 _nfs4_proc_getlk(state, cmd, request),
4090 &exception);
4091 } while (exception.retry);
4092 return err;
4093}
4094
4095static int do_vfs_lock(struct file *file, struct file_lock *fl)
4096{
4097 int res = 0;
4098 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4099 case FL_POSIX:
4100 res = posix_lock_file_wait(file, fl);
4101 break;
4102 case FL_FLOCK:
4103 res = flock_lock_file_wait(file, fl);
4104 break;
4105 default:
4106 BUG();
4107 }
1da177e4
LT		 4108 return res;
4109}
4110
faf5f49c 4111struct nfs4_unlockdata {
911d1aaf
TM		 4112 struct nfs_locku_args arg;
4113 struct nfs_locku_res res;
faf5f49c
TM		 4114 struct nfs4_lock_state *lsp;
4115 struct nfs_open_context *ctx;
911d1aaf
TM		 4116 struct file_lock fl;
4117 const struct nfs_server *server;
26e976a8 4118 unsigned long timestamp;
faf5f49c
TM		 4119};
4120
911d1aaf
TM		 4121static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4122 struct nfs_open_context *ctx,
4123 struct nfs4_lock_state *lsp,
4124 struct nfs_seqid *seqid)
4125{
4126 struct nfs4_unlockdata *p;
4127 struct inode *inode = lsp->ls_state->inode;
4128
8535b2be 4129 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4130 if (p == NULL)
4131 return NULL;
4132 p->arg.fh = NFS_FH(inode);
4133 p->arg.fl = &p->fl;
4134 p->arg.seqid = seqid;
c1d51931 4135 p->res.seqid = seqid;
911d1aaf
TM		 4136 p->arg.stateid = &lsp->ls_stateid;
4137 p->lsp = lsp;
4138 atomic_inc(&lsp->ls_count);
4139 /* Ensure we don't close file until we're done freeing locks! */
4140 p->ctx = get_nfs_open_context(ctx);
4141 memcpy(&p->fl, fl, sizeof(p->fl));
4142 p->server = NFS_SERVER(inode);
4143 return p;
4144}
4145
06f814a3 4146static void nfs4_locku_release_calldata(void *data)
faf5f49c 4147{
963d8fe5 4148 struct nfs4_unlockdata *calldata = data;
911d1aaf 4149 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4150 nfs4_put_lock_state(calldata->lsp);
4151 put_nfs_open_context(calldata->ctx);
4152 kfree(calldata);
faf5f49c
TM		 4153}
4154
963d8fe5 4155static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4156{
963d8fe5 4157 struct nfs4_unlockdata *calldata = data;
faf5f49c 4158
14516c3a
TM		 4159 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4160 return;
faf5f49c
TM		 4161 switch (task->tk_status) {
4162 case 0:
4163 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4164 calldata->res.stateid.data,
faf5f49c 4165 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4166 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4167 break;
9e33bed5
TM		 4168 case -NFS4ERR_BAD_STATEID:
4169 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4170 case -NFS4ERR_STALE_STATEID:
4171 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4172 break;
4173 default:
9e33bed5 4174 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4175 rpc_restart_call_prepare(task);
faf5f49c 4176 }
faf5f49c
TM		 4177}
4178
4ce70ada 4179static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4180{
4ce70ada 4181 struct nfs4_unlockdata *calldata = data;
faf5f49c 4182
911d1aaf 4183 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4184 return;
4185 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4186 /* Note: exit _without_ running nfs4_locku_done */
4187 task->tk_action = NULL;
faf5f49c
TM		 4188 return;
4189 }
26e976a8 4190 calldata->timestamp = jiffies;
035168ab 4191 if (nfs4_setup_sequence(calldata->server,
a893693c 4192 &calldata->arg.seq_args,
9d12b216 4193 &calldata->res.seq_res, task))
a893693c 4194 return;
5138fde0 4195 rpc_call_start(task);
faf5f49c
TM		 4196}
4197
963d8fe5 4198static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4199 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4200 .rpc_call_done = nfs4_locku_done,
06f814a3 4201 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4202};
4203
a5d16a4d
TM		 4204static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4205 struct nfs_open_context *ctx,
4206 struct nfs4_lock_state *lsp,
4207 struct nfs_seqid *seqid)
4208{
4209 struct nfs4_unlockdata *data;
5138fde0
TM		 4210 struct rpc_message msg = {
4211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4212 .rpc_cred = ctx->cred,
4213 };
c970aa85
TM		 4214 struct rpc_task_setup task_setup_data = {
4215 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4216 .rpc_message = &msg,
c970aa85 4217 .callback_ops = &nfs4_locku_ops,
101070ca 4218 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4219 .flags = RPC_TASK_ASYNC,
4220 };
a5d16a4d 4221
137d6aca
FF		 4222 /* Ensure this is an unlock - when canceling a lock, the
4223 * canceled lock is passed in, and it won't be an unlock.
4224 */
4225 fl->fl_type = F_UNLCK;
4226
a5d16a4d
TM		 4227 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4228 if (data == NULL) {
4229 nfs_free_seqid(seqid);
4230 return ERR_PTR(-ENOMEM);
4231 }
4232
9d12b216 4233 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4234 msg.rpc_argp = &data->arg;
4235 msg.rpc_resp = &data->res;
c970aa85
TM		 4236 task_setup_data.callback_data = data;
4237 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4238}
4239
faf5f49c
TM		 4240static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4241{
19e03c57 4242 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4243 struct nfs_seqid *seqid;
1da177e4 4244 struct nfs4_lock_state *lsp;
06f814a3
TM		 4245 struct rpc_task *task;
4246 int status = 0;
536ff0f8 4247 unsigned char fl_flags = request->fl_flags;
faf5f49c 4248
8d0a8a9d 4249 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4250 /* Unlock _before_ we do the RPC call */
4251 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4252 down_read(&nfsi->rwsem);
4253 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4254 up_read(&nfsi->rwsem);
9b073574 4255 goto out;
19e03c57
TM		 4256 }
4257 up_read(&nfsi->rwsem);
8d0a8a9d 4258 if (status != 0)
9b073574
TM		 4259 goto out;
4260 /* Is this a delegated lock? */
4261 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4262 goto out;
8d0a8a9d 4263 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4264 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4265 status = -ENOMEM;
911d1aaf 4266 if (seqid == NULL)
9b073574 4267 goto out;
cd3758e3 4268 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4269 status = PTR_ERR(task);
4270 if (IS_ERR(task))
9b073574 4271 goto out;
a5d16a4d 4272 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4273 rpc_put_task(task);
9b073574 4274out:
536ff0f8 4275 request->fl_flags = fl_flags;
1da177e4
LT		 4276 return status;
4277}
4278
a5d16a4d
TM		 4279struct nfs4_lockdata {
4280 struct nfs_lock_args arg;
4281 struct nfs_lock_res res;
4282 struct nfs4_lock_state *lsp;
4283 struct nfs_open_context *ctx;
4284 struct file_lock fl;
26e976a8 4285 unsigned long timestamp;
a5d16a4d
TM		 4286 int rpc_status;
4287 int cancelled;
66179efe 4288 struct nfs_server *server;
a5d16a4d
TM		 4289};
4290
4291static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4292 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4293 gfp_t gfp_mask)
1da177e4 4294{
a5d16a4d
TM		 4295 struct nfs4_lockdata *p;
4296 struct inode *inode = lsp->ls_state->inode;
1da177e4 4297 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4298
8535b2be 4299 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4300 if (p == NULL)
4301 return NULL;
4302
4303 p->arg.fh = NFS_FH(inode);
4304 p->arg.fl = &p->fl;
8535b2be 4305 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4306 if (p->arg.open_seqid == NULL)
4307 goto out_free;
8535b2be 4308 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4309 if (p->arg.lock_seqid == NULL)
2f74c0a0 4310 goto out_free_seqid;
a5d16a4d 4311 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4312 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4313 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4314 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4315 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4316 p->lsp = lsp;
66179efe 4317 p->server = server;
a5d16a4d
TM		 4318 atomic_inc(&lsp->ls_count);
4319 p->ctx = get_nfs_open_context(ctx);
4320 memcpy(&p->fl, fl, sizeof(p->fl));
4321 return p;
2f74c0a0
TM		 4322out_free_seqid:
4323 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4324out_free:
4325 kfree(p);
4326 return NULL;
4327}
4328
4329static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4330{
4331 struct nfs4_lockdata *data = calldata;
4332 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4333
3110ff80 4334 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4335 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4336 return;
a5d16a4d
TM		 4337 /* Do we need to do an open_to_lock_owner? */
4338 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4339 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4340 return;
a5d16a4d
TM		 4341 data->arg.open_stateid = &state->stateid;
4342 data->arg.new_lock_owner = 1;
c1d51931 4343 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4344 } else
4345 data->arg.new_lock_owner = 0;
26e976a8 4346 data->timestamp = jiffies;
035168ab
TM		 4347 if (nfs4_setup_sequence(data->server,
4348 &data->arg.seq_args,
9d12b216 4349 &data->res.seq_res, task))
66179efe 4350 return;
5138fde0 4351 rpc_call_start(task);
3110ff80 4352 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4353}
4354
b257957e
AB		 4355static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4356{
4357 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4358 nfs4_lock_prepare(task, calldata);
4359}
4360
a5d16a4d
TM		 4361static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4362{
4363 struct nfs4_lockdata *data = calldata;
4364
3110ff80 4365 dprintk("%s: begin!\n", __func__);
a5d16a4d 4366
14516c3a
TM		 4367 if (!nfs4_sequence_done(task, &data->res.seq_res))
4368 return;
66179efe 4369
a5d16a4d 4370 data->rpc_status = task->tk_status;
a5d16a4d 4371 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4372 if (data->rpc_status == 0)
4373 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4374 else
4375 goto out;
4376 }
4377 if (data->rpc_status == 0) {
4378 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4379 sizeof(data->lsp->ls_stateid.data));
4380 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4381 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4382 }
a5d16a4d 4383out:
3110ff80 4384 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4385}
4386
4387static void nfs4_lock_release(void *calldata)
4388{
4389 struct nfs4_lockdata *data = calldata;
4390
3110ff80 4391 dprintk("%s: begin!\n", __func__);
2f74c0a0 4392 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4393 if (data->cancelled != 0) {
4394 struct rpc_task *task;
4395 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4396 data->arg.lock_seqid);
4397 if (!IS_ERR(task))
bf294b41 4398 rpc_put_task_async(task);
3110ff80 4399 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4400 } else
4401 nfs_free_seqid(data->arg.lock_seqid);
4402 nfs4_put_lock_state(data->lsp);
4403 put_nfs_open_context(data->ctx);
4404 kfree(data);
3110ff80 4405 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4406}
4407
4408static const struct rpc_call_ops nfs4_lock_ops = {
4409 .rpc_call_prepare = nfs4_lock_prepare,
4410 .rpc_call_done = nfs4_lock_done,
4411 .rpc_release = nfs4_lock_release,
4412};
4413
b257957e
AB		 4414static const struct rpc_call_ops nfs4_recover_lock_ops = {
4415 .rpc_call_prepare = nfs4_recover_lock_prepare,
4416 .rpc_call_done = nfs4_lock_done,
4417 .rpc_release = nfs4_lock_release,
4418};
4419
2bee72a6
TM		 4420static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4421{
2bee72a6
TM		 4422 switch (error) {
4423 case -NFS4ERR_ADMIN_REVOKED:
4424 case -NFS4ERR_BAD_STATEID:
ecac799a 4425 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4426 if (new_lock_owner != 0 ||
4427 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4428 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4429 break;
4430 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4431 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4432 case -NFS4ERR_EXPIRED:
4433 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4434 };
4435}
4436
afe6c27c 4437static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4438{
4439 struct nfs4_lockdata *data;
4440 struct rpc_task *task;
5138fde0
TM		 4441 struct rpc_message msg = {
4442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4443 .rpc_cred = state->owner->so_cred,
4444 };
c970aa85
TM		 4445 struct rpc_task_setup task_setup_data = {
4446 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4447 .rpc_message = &msg,
c970aa85 4448 .callback_ops = &nfs4_lock_ops,
101070ca 4449 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4450 .flags = RPC_TASK_ASYNC,
4451 };
a5d16a4d
TM		 4452 int ret;
4453
3110ff80 4454 dprintk("%s: begin!\n", __func__);
cd3758e3 4455 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4456 fl->fl_u.nfs4_fl.owner,
4457 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4458 if (data == NULL)
4459 return -ENOMEM;
4460 if (IS_SETLKW(cmd))
4461 data->arg.block = 1;
b257957e
AB		 4462 if (recovery_type > NFS_LOCK_NEW) {
4463 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4464 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4465 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4466 }
9d12b216 4467 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4468 msg.rpc_argp = &data->arg;
4469 msg.rpc_resp = &data->res;
c970aa85
TM		 4470 task_setup_data.callback_data = data;
4471 task = rpc_run_task(&task_setup_data);
7a1218a2 4472 if (IS_ERR(task))
a5d16a4d 4473 return PTR_ERR(task);
a5d16a4d
TM		 4474 ret = nfs4_wait_for_completion_rpc_task(task);
4475 if (ret == 0) {
4476 ret = data->rpc_status;
2bee72a6
TM		 4477 if (ret)
4478 nfs4_handle_setlk_error(data->server, data->lsp,
4479 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4480 } else
4481 data->cancelled = 1;
e6b3c4db 4482 rpc_put_task(task);
3110ff80 4483 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4484 return ret;
1da177e4
LT		 4485}
4486
4487static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4488{
202b50dc
TM		 4489 struct nfs_server *server = NFS_SERVER(state->inode);
4490 struct nfs4_exception exception = { };
4491 int err;
4492
4493 do {
42a2d13e
TM		 4494 /* Cache the lock if possible... */
4495 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4496 return 0;
afe6c27c 4497 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4498 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4499 break;
4500 nfs4_handle_exception(server, err, &exception);
4501 } while (exception.retry);
4502 return err;
1da177e4
LT		 4503}
4504
4505static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4506{
202b50dc
TM		 4507 struct nfs_server *server = NFS_SERVER(state->inode);
4508 struct nfs4_exception exception = { };
4509 int err;
4510
6bfc93ef
TM		 4511 err = nfs4_set_lock_state(state, request);
4512 if (err != 0)
4513 return err;
202b50dc 4514 do {
42a2d13e
TM		 4515 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4516 return 0;
afe6c27c 4517 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4518 switch (err) {
4519 default:
4520 goto out;
4521 case -NFS4ERR_GRACE:
4522 case -NFS4ERR_DELAY:
4523 nfs4_handle_exception(server, err, &exception);
4524 err = 0;
4525 }
202b50dc 4526 } while (exception.retry);
a9ed2e25 4527out:
202b50dc 4528 return err;
1da177e4
LT		 4529}
4530
f062eb6c 4531#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4532static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4533{
b01dd1d8
BS		 4534 int status, ret = NFS_OK;
4535 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4536 struct nfs_server *server = NFS_SERVER(state->inode);
4537
b01dd1d8
BS		 4538 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4539 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4540 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4541 if (status != NFS_OK) {
4542 nfs41_free_stateid(server, &lsp->ls_stateid);
4543 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4544 ret = status;
4545 }
4546 }
4547 };
4548
4549 return ret;
4550}
4551
4552static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4553{
4554 int status = NFS_OK;
4555
4556 if (test_bit(LK_STATE_IN_USE, &state->flags))
4557 status = nfs41_check_expired_locks(state);
f062eb6c 4558 if (status == NFS_OK)
b01dd1d8 4559 return status;
f062eb6c
BS		 4560 return nfs4_lock_expired(state, request);
4561}
4562#endif
4563
1da177e4
LT		 4564static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4565{
19e03c57 4566 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4567 unsigned char fl_flags = request->fl_flags;
8e469ebd 4568 int status = -ENOLCK;
1da177e4 4569
8e469ebd
TM		 4570 if ((fl_flags & FL_POSIX) &&
4571 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4572 goto out;
6bfc93ef 4573 /* Is this a delegated open? */
6bfc93ef
TM		 4574 status = nfs4_set_lock_state(state, request);
4575 if (status != 0)
4576 goto out;
01c3b861
TM		 4577 request->fl_flags |= FL_ACCESS;
4578 status = do_vfs_lock(request->fl_file, request);
4579 if (status < 0)
4580 goto out;
19e03c57 4581 down_read(&nfsi->rwsem);
01c3b861 4582 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4583 /* Yes: cache locks! */
01c3b861 4584 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4585 request->fl_flags = fl_flags & ~FL_SLEEP;
4586 status = do_vfs_lock(request->fl_file, request);
4587 goto out_unlock;
01c3b861 4588 }
afe6c27c 4589 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4590 if (status != 0)
01c3b861 4591 goto out_unlock;
6bfc93ef 4592 /* Note: we always want to sleep here! */
01c3b861 4593 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4594 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4595 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4596 "manager!\n", __func__);
01c3b861 4597out_unlock:
19e03c57 4598 up_read(&nfsi->rwsem);
01c3b861
TM		 4599out:
4600 request->fl_flags = fl_flags;
1da177e4
LT		 4601 return status;
4602}
4603
4604static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4605{
4606 struct nfs4_exception exception = { };
4607 int err;
4608
4609 do {
965b5d67
TM		 4610 err = _nfs4_proc_setlk(state, cmd, request);
4611 if (err == -NFS4ERR_DENIED)
4612 err = -EAGAIN;
1da177e4 4613 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4614 err, &exception);
1da177e4
LT		 4615 } while (exception.retry);
4616 return err;
4617}
4618
4619static int
4620nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4621{
4622 struct nfs_open_context *ctx;
4623 struct nfs4_state *state;
4624 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4625 int status;
4626
4627 /* verify open state */
cd3758e3 4628 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4629 state = ctx->state;
4630
4631 if (request->fl_start < 0 || request->fl_end < 0)
4632 return -EINVAL;
4633
d953126a
TM		 4634 if (IS_GETLK(cmd)) {
4635 if (state != NULL)
4636 return nfs4_proc_getlk(state, F_GETLK, request);
4637 return 0;
4638 }
1da177e4
LT		 4639
4640 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4641 return -EINVAL;
4642
d953126a
TM		 4643 if (request->fl_type == F_UNLCK) {
4644 if (state != NULL)
4645 return nfs4_proc_unlck(state, cmd, request);
4646 return 0;
4647 }
1da177e4 4648
d953126a
TM		 4649 if (state == NULL)
4650 return -ENOLCK;
1da177e4
LT		 4651 do {
4652 status = nfs4_proc_setlk(state, cmd, request);
4653 if ((status != -EAGAIN) || IS_SETLK(cmd))
4654 break;
4655 timeout = nfs4_set_lock_task_retry(timeout);
4656 status = -ERESTARTSYS;
4657 if (signalled())
4658 break;
4659 } while(status < 0);
1da177e4
LT		 4660 return status;
4661}
4662
888e694c
TM		 4663int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4664{
4665 struct nfs_server *server = NFS_SERVER(state->inode);
4666 struct nfs4_exception exception = { };
4667 int err;
4668
4669 err = nfs4_set_lock_state(state, fl);
4670 if (err != 0)
4671 goto out;
4672 do {
afe6c27c 4673 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4674 switch (err) {
4675 default:
a030889a
WAA		 4676 printk(KERN_ERR "NFS: %s: unhandled error "
4677 "%d.\n", __func__, err);
d5122201 4678 case 0:
965b5d67 4679 case -ESTALE:
d5122201
TM		 4680 goto out;
4681 case -NFS4ERR_EXPIRED:
0ced63d1 4682 nfs4_schedule_stateid_recovery(server, state);
d5122201 4683 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4684 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4685 nfs4_schedule_lease_recovery(server->nfs_client);
4686 goto out;
74e7bb73
RL		 4687 case -NFS4ERR_BADSESSION:
4688 case -NFS4ERR_BADSLOT:
4689 case -NFS4ERR_BAD_HIGH_SLOT:
4690 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4691 case -NFS4ERR_DEADSESSION:
0400a6b0 4692 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4693 goto out;
965b5d67
TM		 4694 case -ERESTARTSYS:
4695 /*
4696 * The show must go on: exit, but mark the
4697 * stateid as needing recovery.
4698 */
4699 case -NFS4ERR_ADMIN_REVOKED:
4700 case -NFS4ERR_BAD_STATEID:
4701 case -NFS4ERR_OPENMODE:
0400a6b0 4702 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4703 err = 0;
4704 goto out;
168667c4
TM		 4705 case -EKEYEXPIRED:
4706 /*
4707 * User RPCSEC_GSS context has expired.
4708 * We cannot recover this stateid now, so
4709 * skip it and allow recovery thread to
4710 * proceed.
4711 */
4712 err = 0;
4713 goto out;
965b5d67
TM		 4714 case -ENOMEM:
4715 case -NFS4ERR_DENIED:
4716 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4717 err = 0;
4718 goto out;
d5122201
TM		 4719 case -NFS4ERR_DELAY:
4720 break;
4721 }
888e694c
TM		 4722 err = nfs4_handle_exception(server, err, &exception);
4723 } while (exception.retry);
4724out:
4725 return err;
4726}
6b3b5496 4727
d3c7b7cc
TM		 4728static void nfs4_release_lockowner_release(void *calldata)
4729{
4730 kfree(calldata);
4731}
4732
4733const struct rpc_call_ops nfs4_release_lockowner_ops = {
4734 .rpc_release = nfs4_release_lockowner_release,
4735};
4736
4737void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4738{
4739 struct nfs_server *server = lsp->ls_state->owner->so_server;
4740 struct nfs_release_lockowner_args *args;
4741 struct rpc_message msg = {
4742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4743 };
4744
4745 if (server->nfs_client->cl_mvops->minor_version != 0)
4746 return;
4747 args = kmalloc(sizeof(*args), GFP_NOFS);
4748 if (!args)
4749 return;
4750 args->lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4751 args->lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4752 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4753 msg.rpc_argp = args;
4754 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4755}
4756
aa1870af
BF		 4757#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4758
64c2ce8b
AK		 4759static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4760 const void *buf, size_t buflen,
4761 int flags, int type)
6b3b5496 4762{
64c2ce8b
AK		 4763 if (strcmp(key, "") != 0)
4764 return -EINVAL;
4b580ee3 4765
64c2ce8b 4766 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4767}
4768
64c2ce8b
AK		 4769static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4770 void *buf, size_t buflen, int type)
6b3b5496 4771{
64c2ce8b
AK		 4772 if (strcmp(key, "") != 0)
4773 return -EINVAL;
aa1870af 4774
64c2ce8b 4775 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4776}
4777
64c2ce8b
AK		 4778static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4779 size_t list_len, const char *name,
4780 size_t name_len, int type)
6b3b5496 4781{
64c2ce8b 4782 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4783
096455a2
BF		 4784 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4785 return 0;
64c2ce8b
AK		 4786
4787 if (list && len <= list_len)
4788 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4789 return len;
6b3b5496
BF		 4790}
4791
533eb461
AA		 4792/*
4793 * nfs_fhget will use either the mounted_on_fileid or the fileid
4794 */
69aaaae1
TM		 4795static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4796{
533eb461
AA		 4797 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4798 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4799 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4800 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4801 return;
4802
4803 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4804 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4805 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4806 fattr->nlink = 2;
4807}
4808
56659e99 4809int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4810 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4811{
4812 struct nfs_server *server = NFS_SERVER(dir);
4813 u32 bitmask[2] = {
361e624f 4814 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4815 };
4816 struct nfs4_fs_locations_arg args = {
4817 .dir_fh = NFS_FH(dir),
c228fd3a 4818 .name = name,
683b57b4
TM		 4819 .page = page,
4820 .bitmask = bitmask,
4821 };
22958463
BH		 4822 struct nfs4_fs_locations_res res = {
4823 .fs_locations = fs_locations,
4824 };
683b57b4
TM		 4825 struct rpc_message msg = {
4826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4827 .rpc_argp = &args,
22958463 4828 .rpc_resp = &res,
683b57b4
TM		 4829 };
4830 int status;
4831
3110ff80 4832 dprintk("%s: start\n", __func__);
533eb461
AA		 4833
4834 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4835 * is not supported */
4836 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4837 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4838 else
4839 bitmask[0] |= FATTR4_WORD0_FILEID;
4840
c228fd3a 4841 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4842 fs_locations->server = server;
830b8e33 4843 fs_locations->nlocations = 0;
7c513058 4844 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4845 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4846 return status;
4847}
4848
5a5ea0d4
BS		 4849static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4850{
4851 int status;
4852 struct nfs4_secinfo_arg args = {
4853 .dir_fh = NFS_FH(dir),
4854 .name = name,
4855 };
4856 struct nfs4_secinfo_res res = {
4857 .flavors = flavors,
4858 };
4859 struct rpc_message msg = {
4860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4861 .rpc_argp = &args,
4862 .rpc_resp = &res,
4863 };
4864
4865 dprintk("NFS call secinfo %s\n", name->name);
4866 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4867 dprintk("NFS reply secinfo: %d\n", status);
4868 return status;
4869}
4870
4871int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4872{
4873 struct nfs4_exception exception = { };
4874 int err;
4875 do {
4876 err = nfs4_handle_exception(NFS_SERVER(dir),
4877 _nfs4_proc_secinfo(dir, name, flavors),
4878 &exception);
4879 } while (exception.retry);
4880 return err;
4881}
4882
557134a3 4883#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4884/*
4885 * Check the exchange flags returned by the server for invalid flags, having
4886 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4887 * DS flags set.
4888 */
4889static int nfs4_check_cl_exchange_flags(u32 flags)
4890{
4891 if (flags & ~EXCHGID4_FLAG_MASK_R)
4892 goto out_inval;
4893 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4894 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4895 goto out_inval;
4896 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4897 goto out_inval;
4898 return NFS_OK;
4899out_inval:
4900 return -NFS4ERR_INVAL;
4901}
4902
78fe0f41
WAA		 4903static bool
4904nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4905{
4906 if (a->server_scope_sz == b->server_scope_sz &&
4907 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4908 return true;
4909
4910 return false;
4911}
4912
99fe60d0
BH		 4913/*
4914 * nfs4_proc_exchange_id()
4915 *
4916 * Since the clientid has expired, all compounds using sessions
4917 * associated with the stale clientid will be returning
4918 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4919 * be in some phase of session reset.
4920 */
4d643d1d 4921int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4922{
4923 nfs4_verifier verifier;
4924 struct nfs41_exchange_id_args args = {
4925 .client = clp,
357f54d6 4926 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4927 };
4928 struct nfs41_exchange_id_res res = {
4929 .client = clp,
4930 };
4931 int status;
4932 struct rpc_message msg = {
4933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4934 .rpc_argp = &args,
4935 .rpc_resp = &res,
4936 .rpc_cred = cred,
4937 };
4938 __be32 *p;
4939
4940 dprintk("--> %s\n", __func__);
4941 BUG_ON(clp == NULL);
a7b72103 4942
99fe60d0
BH		 4943 p = (u32 *)verifier.data;
4944 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4945 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4946 args.verifier = &verifier;
4947
c7a360b0
AA		 4948 args.id_len = scnprintf(args.id, sizeof(args.id),
4949 "%s/%s.%s/%u",
4950 clp->cl_ipaddr,
4951 init_utsname()->nodename,
4952 init_utsname()->domainname,
4953 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4954
78fe0f41 4955 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
9edbd953
WAA		 4956 if (unlikely(!res.server_scope)) {
4957 status = -ENOMEM;
4958 goto out;
4959 }
78fe0f41 4960
7d2ed9ac
WAA		 4961 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4962 if (unlikely(!res.impl_id)) {
4963 status = -ENOMEM;
4964 goto out_server_scope;
4965 }
4966
1bd714f2 4967 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4968 if (!status)
4969 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41 4970
7d2ed9ac
WAA		 4971 if (!status) {
4972 /* use the most recent implementation id */
4973 kfree(clp->impl_id);
4974 clp->impl_id = res.impl_id;
4975 } else
4976 kfree(res.impl_id);
4977
78fe0f41
WAA		 4978 if (!status) {
4979 if (clp->server_scope &&
4980 !nfs41_same_server_scope(clp->server_scope,
4981 res.server_scope)) {
4982 dprintk("%s: server_scope mismatch detected\n",
4983 __func__);
4984 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4985 kfree(clp->server_scope);
4986 clp->server_scope = NULL;
4987 }
4988
9edbd953 4989 if (!clp->server_scope) {
78fe0f41 4990 clp->server_scope = res.server_scope;
9edbd953
WAA		 4991 goto out;
4992 }
78fe0f41 4993 }
7d2ed9ac
WAA		 4994
4995out_server_scope:
9edbd953
WAA		 4996 kfree(res.server_scope);
4997out:
7d2ed9ac
WAA		 4998 if (clp->impl_id)
4999 dprintk("%s: Server Implementation ID: "
5000 "domain: %s, name: %s, date: %llu,%u\n",
5001 __func__, clp->impl_id->domain, clp->impl_id->name,
5002 clp->impl_id->date.seconds,
5003 clp->impl_id->date.nseconds);
99fe60d0
BH		 5004 dprintk("<-- %s status= %d\n", __func__, status);
5005 return status;
5006}
5007
2050f0cc
AA		 5008struct nfs4_get_lease_time_data {
5009 struct nfs4_get_lease_time_args *args;
5010 struct nfs4_get_lease_time_res *res;
5011 struct nfs_client *clp;
5012};
5013
5014static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5015 void *calldata)
5016{
5017 int ret;
5018 struct nfs4_get_lease_time_data *data =
5019 (struct nfs4_get_lease_time_data *)calldata;
5020
5021 dprintk("--> %s\n", __func__);
689cf5c1 5022 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5023 /* just setup sequence, do not trigger session recovery
5024 since we're invoked within one */
5025 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5026 &data->args->la_seq_args,
9d12b216 5027 &data->res->lr_seq_res, task);
2050f0cc
AA		 5028
5029 BUG_ON(ret == -EAGAIN);
5030 rpc_call_start(task);
5031 dprintk("<-- %s\n", __func__);
5032}
5033
5034/*
5035 * Called from nfs4_state_manager thread for session setup, so don't recover
5036 * from sequence operation or clientid errors.
5037 */
5038static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5039{
5040 struct nfs4_get_lease_time_data *data =
5041 (struct nfs4_get_lease_time_data *)calldata;
5042
5043 dprintk("--> %s\n", __func__);
14516c3a
TM		 5044 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5045 return;
2050f0cc
AA		 5046 switch (task->tk_status) {
5047 case -NFS4ERR_DELAY:
5048 case -NFS4ERR_GRACE:
5049 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5050 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5051 task->tk_status = 0;
a8a4ae3a
AA		 5052 /* fall through */
5053 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5054 rpc_restart_call_prepare(task);
2050f0cc
AA		 5055 return;
5056 }
2050f0cc
AA		 5057 dprintk("<-- %s\n", __func__);
5058}
5059
5060struct rpc_call_ops nfs4_get_lease_time_ops = {
5061 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5062 .rpc_call_done = nfs4_get_lease_time_done,
5063};
5064
5065int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5066{
5067 struct rpc_task *task;
5068 struct nfs4_get_lease_time_args args;
5069 struct nfs4_get_lease_time_res res = {
5070 .lr_fsinfo = fsinfo,
5071 };
5072 struct nfs4_get_lease_time_data data = {
5073 .args = &args,
5074 .res = &res,
5075 .clp = clp,
5076 };
5077 struct rpc_message msg = {
5078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5079 .rpc_argp = &args,
5080 .rpc_resp = &res,
5081 };
5082 struct rpc_task_setup task_setup = {
5083 .rpc_client = clp->cl_rpcclient,
5084 .rpc_message = &msg,
5085 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5086 .callback_data = &data,
5087 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5088 };
5089 int status;
5090
9d12b216 5091 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5092 dprintk("--> %s\n", __func__);
5093 task = rpc_run_task(&task_setup);
5094
5095 if (IS_ERR(task))
5096 status = PTR_ERR(task);
5097 else {
5098 status = task->tk_status;
5099 rpc_put_task(task);
5100 }
5101 dprintk("<-- %s return %d\n", __func__, status);
5102
5103 return status;
5104}
5105
b73dafa7
RL		 5106/*
5107 * Reset a slot table
5108 */
104aeba4
AA		 5109static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5110 int ivalue)
ac72b7b3 5111{
104aeba4 5112 struct nfs4_slot *new = NULL;
b73dafa7 5113 int i;
ac72b7b3
AA		 5114 int ret = 0;
5115
104aeba4
AA		 5116 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5117 max_reqs, tbl->max_slots);
ac72b7b3 5118
104aeba4
AA		 5119 /* Does the newly negotiated max_reqs match the existing slot table? */
5120 if (max_reqs != tbl->max_slots) {
5121 ret = -ENOMEM;
5122 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 5123 GFP_NOFS);
104aeba4
AA		 5124 if (!new)
5125 goto out;
5126 ret = 0;
5127 kfree(tbl->slots);
ac72b7b3
AA		 5128 }
5129 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 5130 if (new) {
5131 tbl->slots = new;
5132 tbl->max_slots = max_reqs;
5133 }
5134 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 5135 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 5136 spin_unlock(&tbl->slot_tbl_lock);
5137 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5138 tbl, tbl->slots, tbl->max_slots);
5139out:
5140 dprintk("<-- %s: return %d\n", __func__, ret);
5141 return ret;
5142}
5143
f8625a6a
RL		 5144/* Destroy the slot table */
5145static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5146{
5147 if (session->fc_slot_table.slots != NULL) {
5148 kfree(session->fc_slot_table.slots);
5149 session->fc_slot_table.slots = NULL;
5150 }
5151 if (session->bc_slot_table.slots != NULL) {
5152 kfree(session->bc_slot_table.slots);
5153 session->bc_slot_table.slots = NULL;
5154 }
5155 return;
5156}
5157
fc931582
AA		 5158/*
5159 * Initialize slot table
5160 */
050047ce
RL		 5161static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5162 int max_slots, int ivalue)
fc931582 5163{
fc931582
AA		 5164 struct nfs4_slot *slot;
5165 int ret = -ENOMEM;
5166
5167 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5168
050047ce 5169 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 5170
8535b2be 5171 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 5172 if (!slot)
5173 goto out;
fc931582
AA		 5174 ret = 0;
5175
5176 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 5177 tbl->max_slots = max_slots;
5178 tbl->slots = slot;
45d43c29 5179 tbl->highest_used_slotid = NFS4_NO_SLOT; /* no slot is currently used */
fc931582
AA		 5180 spin_unlock(&tbl->slot_tbl_lock);
5181 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5182 tbl, tbl->slots, tbl->max_slots);
5183out:
5184 dprintk("<-- %s: return %d\n", __func__, ret);
5185 return ret;
fc931582
AA		 5186}
5187
050047ce 5188/*
aacd5537 5189 * Initialize or reset the forechannel and backchannel tables
050047ce 5190 */
aacd5537 5191static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5192{
f26468fb 5193 struct nfs4_slot_table *tbl;
aacd5537 5194 int status;
050047ce 5195
aacd5537
AA		 5196 dprintk("--> %s\n", __func__);
5197 /* Fore channel */
5198 tbl = &ses->fc_slot_table;
f26468fb 5199 if (tbl->slots == NULL) {
aacd5537
AA		 5200 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5201 if (status) /* -ENOMEM */
5202 return status;
5203 } else {
5204 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
f26468fb
TM		 5205 if (status)
5206 return status;
5207 }
aacd5537
AA		 5208 /* Back channel */
5209 tbl = &ses->bc_slot_table;
f26468fb 5210 if (tbl->slots == NULL) {
aacd5537 5211 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
f26468fb 5212 if (status)
aacd5537
AA		 5213 /* Fore and back channel share a connection so get
5214 * both slot tables or neither */
5215 nfs4_destroy_slot_tables(ses);
5216 } else
5217 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
f8625a6a 5218 return status;
557134a3
AA		 5219}
5220
5221struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5222{
5223 struct nfs4_session *session;
5224 struct nfs4_slot_table *tbl;
5225
8535b2be 5226 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5227 if (!session)
5228 return NULL;
76db6d95 5229
557134a3 5230 tbl = &session->fc_slot_table;
45d43c29 5231 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5232 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5233 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5234 init_completion(&tbl->complete);
f8625a6a
RL		 5235
5236 tbl = &session->bc_slot_table;
45d43c29 5237 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5238 spin_lock_init(&tbl->slot_tbl_lock);
5239 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5240 init_completion(&tbl->complete);
f8625a6a 5241
1055d76d
TM		 5242 session->session_state = 1<<NFS4_SESSION_INITING;
5243
557134a3
AA		 5244 session->clp = clp;
5245 return session;
5246}
5247
5248void nfs4_destroy_session(struct nfs4_session *session)
5249{
2446ab60
TM		 5250 struct rpc_xprt *xprt;
5251
5a0ffe54 5252 nfs4_proc_destroy_session(session);
2446ab60
TM		 5253
5254 rcu_read_lock();
5255 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5256 rcu_read_unlock();
5a0ffe54 5257 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5258 __func__, xprt);
5259 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5260 nfs4_destroy_slot_tables(session);
557134a3
AA		 5261 kfree(session);
5262}
5263
fc931582
AA		 5264/*
5265 * Initialize the values to be used by the client in CREATE_SESSION
5266 * If nfs4_init_session set the fore channel request and response sizes,
5267 * use them.
5268 *
5269 * Set the back channel max_resp_sz_cached to zero to force the client to
5270 * always set csa_cachethis to FALSE because the current implementation
5271 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5272 */
5273static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5274{
5275 struct nfs4_session *session = args->client->cl_session;
5276 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5277 mxresp_sz = session->fc_attrs.max_resp_sz;
5278
5279 if (mxrqst_sz == 0)
5280 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5281 if (mxresp_sz == 0)
5282 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5283 /* Fore channel attributes */
fc931582
AA		 5284 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5285 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5286 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5287 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5288
5289 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5290 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5291 __func__,
5292 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5293 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5294
5295 /* Back channel attributes */
fc931582
AA		 5296 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5297 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5298 args->bc_attrs.max_resp_sz_cached = 0;
5299 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5300 args->bc_attrs.max_reqs = 1;
5301
5302 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5303 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5304 __func__,
5305 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5306 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5307 args->bc_attrs.max_reqs);
5308}
5309
43c2e885 5310static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5311{
43c2e885
BF		 5312 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5313 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5314
43c2e885
BF		 5315 if (rcvd->max_resp_sz > sent->max_resp_sz)
5316 return -EINVAL;
5317 /*
5318 * Our requested max_ops is the minimum we need; we're not
5319 * prepared to break up compounds into smaller pieces than that.
5320 * So, no point even trying to continue if the server won't
5321 * cooperate:
5322 */
5323 if (rcvd->max_ops < sent->max_ops)
5324 return -EINVAL;
5325 if (rcvd->max_reqs == 0)
5326 return -EINVAL;
b4b9a0c1
VG		 5327 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5328 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5329 return 0;
8d35301d
AA		 5330}
5331
43c2e885
BF		 5332static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5333{
5334 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5335 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5336
43c2e885
BF		 5337 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5338 return -EINVAL;
5339 if (rcvd->max_resp_sz < sent->max_resp_sz)
5340 return -EINVAL;
5341 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5342 return -EINVAL;
5343 /* These would render the backchannel useless: */
b4b9a0c1 5344 if (rcvd->max_ops != sent->max_ops)
43c2e885 5345 return -EINVAL;
b4b9a0c1 5346 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5347 return -EINVAL;
5348 return 0;
5349}
8d35301d 5350
8d35301d
AA		 5351static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5352 struct nfs4_session *session)
5353{
43c2e885 5354 int ret;
8d35301d 5355
43c2e885
BF		 5356 ret = nfs4_verify_fore_channel_attrs(args, session);
5357 if (ret)
5358 return ret;
5359 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5360}
5361
fc931582
AA		 5362static int _nfs4_proc_create_session(struct nfs_client *clp)
5363{
5364 struct nfs4_session *session = clp->cl_session;
5365 struct nfs41_create_session_args args = {
5366 .client = clp,
5367 .cb_program = NFS4_CALLBACK,
5368 };
5369 struct nfs41_create_session_res res = {
5370 .client = clp,
5371 };
5372 struct rpc_message msg = {
5373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5374 .rpc_argp = &args,
5375 .rpc_resp = &res,
5376 };
5377 int status;
5378
5379 nfs4_init_channel_attrs(&args);
0f91421e 5380 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5381
1bd714f2 5382 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5383
8d35301d
AA		 5384 if (!status)
5385 /* Verify the session's negotiated channel_attrs values */
5386 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5387 if (!status) {
5388 /* Increment the clientid slot sequence id */
5389 clp->cl_seqid++;
5390 }
5391
5392 return status;
5393}
5394
5395/*
5396 * Issues a CREATE_SESSION operation to the server.
5397 * It is the responsibility of the caller to verify the session is
5398 * expired before calling this routine.
5399 */
f26468fb 5400int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5401{
5402 int status;
5403 unsigned *ptr;
fc931582
AA		 5404 struct nfs4_session *session = clp->cl_session;
5405
5406 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5407
fd954ae1 5408 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5409 if (status)
5410 goto out;
5411
aacd5537
AA		 5412 /* Init or reset the session slot tables */
5413 status = nfs4_setup_session_slot_tables(session);
5414 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5415 if (status)
5416 goto out;
5417
5418 ptr = (unsigned *)&session->sess_id.data[0];
5419 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5420 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5421out:
5422 dprintk("<-- %s\n", __func__);
5423 return status;
5424}
5425
0f3e66c6
AA		 5426/*
5427 * Issue the over-the-wire RPC DESTROY_SESSION.
5428 * The caller must serialize access to this routine.
5429 */
5430int nfs4_proc_destroy_session(struct nfs4_session *session)
5431{
5432 int status = 0;
5433 struct rpc_message msg;
5434
5435 dprintk("--> nfs4_proc_destroy_session\n");
5436
5437 /* session is still being setup */
5438 if (session->clp->cl_cons_state != NFS_CS_READY)
5439 return status;
5440
5441 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5442 msg.rpc_argp = session;
5443 msg.rpc_resp = NULL;
5444 msg.rpc_cred = NULL;
1bd714f2 5445 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5446
5447 if (status)
5448 printk(KERN_WARNING
f9fd2d9c 5449 "NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5450 "Session has been destroyed regardless...\n", status);
5451
5452 dprintk("<-- nfs4_proc_destroy_session\n");
5453 return status;
5454}
5455
fccba804
TM		 5456int nfs4_init_session(struct nfs_server *server)
5457{
5458 struct nfs_client *clp = server->nfs_client;
2449ea2e 5459 struct nfs4_session *session;
68bf05ef 5460 unsigned int rsize, wsize;
fccba804
TM		 5461 int ret;
5462
5463 if (!nfs4_has_session(clp))
5464 return 0;
5465
1055d76d
TM		 5466 session = clp->cl_session;
5467 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5468 return 0;
5469
68bf05ef
AA		 5470 rsize = server->rsize;
5471 if (rsize == 0)
5472 rsize = NFS_MAX_FILE_IO_SIZE;
5473 wsize = server->wsize;
5474 if (wsize == 0)
5475 wsize = NFS_MAX_FILE_IO_SIZE;
5476
68bf05ef
AA		 5477 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5478 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5479
fccba804
TM		 5480 ret = nfs4_recover_expired_lease(server);
5481 if (!ret)
5482 ret = nfs4_check_client_ready(clp);
5483 return ret;
5484}
5485
d83217c1
AA		 5486int nfs4_init_ds_session(struct nfs_client *clp)
5487{
5488 struct nfs4_session *session = clp->cl_session;
5489 int ret;
5490
5491 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5492 return 0;
5493
5494 ret = nfs4_client_recover_expired_lease(clp);
5495 if (!ret)
5496 /* Test for the DS role */
5497 if (!is_ds_client(clp))
5498 ret = -ENODEV;
5499 if (!ret)
5500 ret = nfs4_check_client_ready(clp);
5501 return ret;
5502
5503}
5504EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5505
5506
fc01cea9
AA		 5507/*
5508 * Renew the cl_session lease.
5509 */
d5f8d3fe
TM		 5510struct nfs4_sequence_data {
5511 struct nfs_client *clp;
5512 struct nfs4_sequence_args args;
5513 struct nfs4_sequence_res res;
5514};
5515
dc96aef9
AB		 5516static void nfs41_sequence_release(void *data)
5517{
d5f8d3fe
TM		 5518 struct nfs4_sequence_data *calldata = data;
5519 struct nfs_client *clp = calldata->clp;
dc96aef9 5520
7135840f
AB		 5521 if (atomic_read(&clp->cl_count) > 1)
5522 nfs4_schedule_state_renewal(clp);
5523 nfs_put_client(clp);
d5f8d3fe 5524 kfree(calldata);
dc96aef9
AB		 5525}
5526
aa5190d0
TM		 5527static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5528{
5529 switch(task->tk_status) {
5530 case -NFS4ERR_DELAY:
aa5190d0
TM		 5531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5532 return -EAGAIN;
5533 default:
0400a6b0 5534 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5535 }
5536 return 0;
5537}
5538
dc96aef9 5539static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5540{
d5f8d3fe
TM		 5541 struct nfs4_sequence_data *calldata = data;
5542 struct nfs_client *clp = calldata->clp;
fc01cea9 5543
14516c3a
TM		 5544 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5545 return;
fc01cea9
AA		 5546
5547 if (task->tk_status < 0) {
5548 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5549 if (atomic_read(&clp->cl_count) == 1)
5550 goto out;
fc01cea9 5551
aa5190d0
TM		 5552 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5553 rpc_restart_call_prepare(task);
fc01cea9
AA		 5554 return;
5555 }
5556 }
fc01cea9 5557 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5558out:
fc01cea9
AA		 5559 dprintk("<-- %s\n", __func__);
5560}
5561
5562static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5563{
d5f8d3fe
TM		 5564 struct nfs4_sequence_data *calldata = data;
5565 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5566 struct nfs4_sequence_args *args;
5567 struct nfs4_sequence_res *res;
5568
fc01cea9
AA		 5569 args = task->tk_msg.rpc_argp;
5570 res = task->tk_msg.rpc_resp;
5571
9d12b216 5572 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5573 return;
5574 rpc_call_start(task);
5575}
5576
5577static const struct rpc_call_ops nfs41_sequence_ops = {
5578 .rpc_call_done = nfs41_sequence_call_done,
5579 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5580 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5581};
5582
71ac6da9 5583static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5584{
d5f8d3fe 5585 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5586 struct rpc_message msg = {
5587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5588 .rpc_cred = cred,
5589 };
71ac6da9
TM		 5590 struct rpc_task_setup task_setup_data = {
5591 .rpc_client = clp->cl_rpcclient,
5592 .rpc_message = &msg,
5593 .callback_ops = &nfs41_sequence_ops,
5594 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5595 };
fc01cea9 5596
7135840f 5597 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5598 return ERR_PTR(-EIO);
dfb4f309 5599 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5600 if (calldata == NULL) {
7135840f 5601 nfs_put_client(clp);
71ac6da9 5602 return ERR_PTR(-ENOMEM);
fc01cea9 5603 }
9d12b216 5604 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5605 msg.rpc_argp = &calldata->args;
5606 msg.rpc_resp = &calldata->res;
5607 calldata->clp = clp;
71ac6da9 5608 task_setup_data.callback_data = calldata;
fc01cea9 5609
71ac6da9
TM		 5610 return rpc_run_task(&task_setup_data);
5611}
5612
2f60ea6b 5613static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5614{
5615 struct rpc_task *task;
5616 int ret = 0;
5617
2f60ea6b
TM		 5618 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5619 return 0;
71ac6da9
TM		 5620 task = _nfs41_proc_sequence(clp, cred);
5621 if (IS_ERR(task))
5622 ret = PTR_ERR(task);
5623 else
bf294b41 5624 rpc_put_task_async(task);
71ac6da9
TM		 5625 dprintk("<-- %s status=%d\n", __func__, ret);
5626 return ret;
5627}
5628
5629static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5630{
5631 struct rpc_task *task;
5632 int ret;
5633
5634 task = _nfs41_proc_sequence(clp, cred);
5635 if (IS_ERR(task)) {
5636 ret = PTR_ERR(task);
5637 goto out;
5638 }
5639 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5640 if (!ret) {
5641 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5642
5643 if (task->tk_status == 0)
5644 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5645 ret = task->tk_status;
b4410c2f 5646 }
71ac6da9
TM		 5647 rpc_put_task(task);
5648out:
5649 dprintk("<-- %s status=%d\n", __func__, ret);
5650 return ret;
fc01cea9
AA		 5651}
5652
fce5c838
RL		 5653struct nfs4_reclaim_complete_data {
5654 struct nfs_client *clp;
5655 struct nfs41_reclaim_complete_args arg;
5656 struct nfs41_reclaim_complete_res res;
5657};
5658
5659static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5660{
5661 struct nfs4_reclaim_complete_data *calldata = data;
5662
b257957e 5663 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5664 if (nfs41_setup_sequence(calldata->clp->cl_session,
5665 &calldata->arg.seq_args,
9d12b216 5666 &calldata->res.seq_res, task))
fce5c838
RL		 5667 return;
5668
5669 rpc_call_start(task);
5670}
5671
aa5190d0
TM		 5672static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5673{
5674 switch(task->tk_status) {
5675 case 0:
5676 case -NFS4ERR_COMPLETE_ALREADY:
5677 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5678 break;
5679 case -NFS4ERR_DELAY:
aa5190d0 5680 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5681 /* fall through */
5682 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5683 return -EAGAIN;
5684 default:
0400a6b0 5685 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5686 }
5687 return 0;
5688}
5689
fce5c838
RL		 5690static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5691{
5692 struct nfs4_reclaim_complete_data *calldata = data;
5693 struct nfs_client *clp = calldata->clp;
5694 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5695
5696 dprintk("--> %s\n", __func__);
14516c3a
TM		 5697 if (!nfs41_sequence_done(task, res))
5698 return;
fce5c838 5699
aa5190d0
TM		 5700 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5701 rpc_restart_call_prepare(task);
5702 return;
5703 }
fce5c838
RL		 5704 dprintk("<-- %s\n", __func__);
5705}
5706
5707static void nfs4_free_reclaim_complete_data(void *data)
5708{
5709 struct nfs4_reclaim_complete_data *calldata = data;
5710
5711 kfree(calldata);
5712}
5713
5714static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5715 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5716 .rpc_call_done = nfs4_reclaim_complete_done,
5717 .rpc_release = nfs4_free_reclaim_complete_data,
5718};
5719
5720/*
5721 * Issue a global reclaim complete.
5722 */
5723static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5724{
5725 struct nfs4_reclaim_complete_data *calldata;
5726 struct rpc_task *task;
5727 struct rpc_message msg = {
5728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5729 };
5730 struct rpc_task_setup task_setup_data = {
5731 .rpc_client = clp->cl_rpcclient,
5732 .rpc_message = &msg,
5733 .callback_ops = &nfs4_reclaim_complete_call_ops,
5734 .flags = RPC_TASK_ASYNC,
5735 };
5736 int status = -ENOMEM;
5737
5738 dprintk("--> %s\n", __func__);
8535b2be 5739 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5740 if (calldata == NULL)
5741 goto out;
5742 calldata->clp = clp;
5743 calldata->arg.one_fs = 0;
fce5c838 5744
9d12b216 5745 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5746 msg.rpc_argp = &calldata->arg;
5747 msg.rpc_resp = &calldata->res;
5748 task_setup_data.callback_data = calldata;
5749 task = rpc_run_task(&task_setup_data);
acf82b85 5750 if (IS_ERR(task)) {
fce5c838 5751 status = PTR_ERR(task);
acf82b85
DC		 5752 goto out;
5753 }
c34c32ea
AA		 5754 status = nfs4_wait_for_completion_rpc_task(task);
5755 if (status == 0)
5756 status = task->tk_status;
fce5c838 5757 rpc_put_task(task);
acf82b85 5758 return 0;
fce5c838
RL		 5759out:
5760 dprintk("<-- %s status=%d\n", __func__, status);
5761 return status;
5762}
b1f69b75
AA		 5763
5764static void
5765nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5766{
5767 struct nfs4_layoutget *lgp = calldata;
c31663d4 5768 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5769
5770 dprintk("--> %s\n", __func__);
c31663d4
FI		 5771 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5772 * right now covering the LAYOUTGET we are about to send.
5773 * However, that is not so catastrophic, and there seems
5774 * to be no way to prevent it completely.
5775 */
b1f69b75 5776 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 5777 &lgp->res.seq_res, task))
b1f69b75 5778 return;
cf7d63f1
FI		 5779 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5780 NFS_I(lgp->args.inode)->layout,
5781 lgp->args.ctx->state)) {
5782 rpc_exit(task, NFS4_OK);
5783 return;
5784 }
b1f69b75
AA		 5785 rpc_call_start(task);
5786}
5787
5788static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5789{
5790 struct nfs4_layoutget *lgp = calldata;
5791 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5792
5793 dprintk("--> %s\n", __func__);
5794
5795 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5796 return;
5797
5798 switch (task->tk_status) {
5799 case 0:
5800 break;
5801 case -NFS4ERR_LAYOUTTRYLATER:
5802 case -NFS4ERR_RECALLCONFLICT:
5803 task->tk_status = -NFS4ERR_DELAY;
5804 /* Fall through */
5805 default:
5806 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5807 rpc_restart_call_prepare(task);
5808 return;
5809 }
5810 }
b1f69b75
AA		 5811 dprintk("<-- %s\n", __func__);
5812}
5813
5814static void nfs4_layoutget_release(void *calldata)
5815{
5816 struct nfs4_layoutget *lgp = calldata;
5817
5818 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5819 put_nfs_open_context(lgp->args.ctx);
5820 kfree(calldata);
5821 dprintk("<-- %s\n", __func__);
5822}
5823
5824static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5825 .rpc_call_prepare = nfs4_layoutget_prepare,
5826 .rpc_call_done = nfs4_layoutget_done,
5827 .rpc_release = nfs4_layoutget_release,
5828};
5829
5830int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5831{
5832 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5833 struct rpc_task *task;
5834 struct rpc_message msg = {
5835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5836 .rpc_argp = &lgp->args,
5837 .rpc_resp = &lgp->res,
5838 };
5839 struct rpc_task_setup task_setup_data = {
5840 .rpc_client = server->client,
5841 .rpc_message = &msg,
5842 .callback_ops = &nfs4_layoutget_call_ops,
5843 .callback_data = lgp,
5844 .flags = RPC_TASK_ASYNC,
5845 };
5846 int status = 0;
5847
5848 dprintk("--> %s\n", __func__);
5849
35124a09 5850 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 5851 lgp->res.seq_res.sr_slot = NULL;
9d12b216 5852 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 5853 task = rpc_run_task(&task_setup_data);
5854 if (IS_ERR(task))
5855 return PTR_ERR(task);
5856 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5857 if (status == 0)
5858 status = task->tk_status;
5859 if (status == 0)
5860 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5861 rpc_put_task(task);
5862 dprintk("<-- %s status=%d\n", __func__, status);
5863 return status;
5864}
5865
cbe82603
BH		 5866static void
5867nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5868{
5869 struct nfs4_layoutreturn *lrp = calldata;
5870
5871 dprintk("--> %s\n", __func__);
5872 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 5873 &lrp->res.seq_res, task))
cbe82603
BH		 5874 return;
5875 rpc_call_start(task);
5876}
5877
5878static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5879{
5880 struct nfs4_layoutreturn *lrp = calldata;
5881 struct nfs_server *server;
a56aaa02 5882 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5883
5884 dprintk("--> %s\n", __func__);
5885
5886 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5887 return;
5888
5889 server = NFS_SERVER(lrp->args.inode);
5890 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5891 rpc_restart_call_prepare(task);
cbe82603
BH		 5892 return;
5893 }
a2e1d4f2 5894 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5895 if (task->tk_status == 0) {
cbe82603 5896 if (lrp->res.lrs_present) {
cbe82603 5897 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5898 } else
5899 BUG_ON(!list_empty(&lo->plh_segs));
5900 }
a2e1d4f2
FI		 5901 lo->plh_block_lgets--;
5902 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5903 dprintk("<-- %s\n", __func__);
5904}
5905
5906static void nfs4_layoutreturn_release(void *calldata)
5907{
5908 struct nfs4_layoutreturn *lrp = calldata;
5909
5910 dprintk("--> %s\n", __func__);
a56aaa02 5911 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5912 kfree(calldata);
5913 dprintk("<-- %s\n", __func__);
5914}
5915
5916static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5917 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5918 .rpc_call_done = nfs4_layoutreturn_done,
5919 .rpc_release = nfs4_layoutreturn_release,
5920};
5921
5922int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5923{
5924 struct rpc_task *task;
5925 struct rpc_message msg = {
5926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5927 .rpc_argp = &lrp->args,
5928 .rpc_resp = &lrp->res,
5929 };
5930 struct rpc_task_setup task_setup_data = {
5931 .rpc_client = lrp->clp->cl_rpcclient,
5932 .rpc_message = &msg,
5933 .callback_ops = &nfs4_layoutreturn_call_ops,
5934 .callback_data = lrp,
5935 };
5936 int status;
5937
5938 dprintk("--> %s\n", __func__);
9d12b216 5939 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 5940 task = rpc_run_task(&task_setup_data);
5941 if (IS_ERR(task))
5942 return PTR_ERR(task);
5943 status = task->tk_status;
5944 dprintk("<-- %s status=%d\n", __func__, status);
5945 rpc_put_task(task);
5946 return status;
5947}
5948
7f11d8d3
AA		 5949/*
5950 * Retrieve the list of Data Server devices from the MDS.
5951 */
5952static int _nfs4_getdevicelist(struct nfs_server *server,
5953 const struct nfs_fh *fh,
5954 struct pnfs_devicelist *devlist)
5955{
5956 struct nfs4_getdevicelist_args args = {
5957 .fh = fh,
5958 .layoutclass = server->pnfs_curr_ld->id,
5959 };
5960 struct nfs4_getdevicelist_res res = {
5961 .devlist = devlist,
5962 };
5963 struct rpc_message msg = {
5964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5965 .rpc_argp = &args,
5966 .rpc_resp = &res,
5967 };
5968 int status;
5969
5970 dprintk("--> %s\n", __func__);
5971 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5972 &res.seq_res, 0);
5973 dprintk("<-- %s status=%d\n", __func__, status);
5974 return status;
5975}
5976
5977int nfs4_proc_getdevicelist(struct nfs_server *server,
5978 const struct nfs_fh *fh,
5979 struct pnfs_devicelist *devlist)
5980{
5981 struct nfs4_exception exception = { };
5982 int err;
5983
5984 do {
5985 err = nfs4_handle_exception(server,
5986 _nfs4_getdevicelist(server, fh, devlist),
5987 &exception);
5988 } while (exception.retry);
5989
5990 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5991 err, devlist->num_devs);
5992
5993 return err;
5994}
5995EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5996
b1f69b75
AA		 5997static int
5998_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5999{
6000 struct nfs4_getdeviceinfo_args args = {
6001 .pdev = pdev,
6002 };
6003 struct nfs4_getdeviceinfo_res res = {
6004 .pdev = pdev,
6005 };
6006 struct rpc_message msg = {
6007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6008 .rpc_argp = &args,
6009 .rpc_resp = &res,
6010 };
6011 int status;
6012
6013 dprintk("--> %s\n", __func__);
7c513058 6014 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6015 dprintk("<-- %s status=%d\n", __func__, status);
6016
6017 return status;
6018}
6019
6020int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6021{
6022 struct nfs4_exception exception = { };
6023 int err;
6024
6025 do {
6026 err = nfs4_handle_exception(server,
6027 _nfs4_proc_getdeviceinfo(server, pdev),
6028 &exception);
6029 } while (exception.retry);
6030 return err;
6031}
6032EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6033
863a3c6c
AA		 6034static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6035{
6036 struct nfs4_layoutcommit_data *data = calldata;
6037 struct nfs_server *server = NFS_SERVER(data->args.inode);
6038
6039 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6040 &data->res.seq_res, task))
863a3c6c
AA		 6041 return;
6042 rpc_call_start(task);
6043}
6044
6045static void
6046nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6047{
6048 struct nfs4_layoutcommit_data *data = calldata;
6049 struct nfs_server *server = NFS_SERVER(data->args.inode);
6050
6051 if (!nfs4_sequence_done(task, &data->res.seq_res))
6052 return;
6053
6054 switch (task->tk_status) { /* Just ignore these failures */
6055 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6056 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6057 case NFS4ERR_BADLAYOUT: /* no layout */
6058 case NFS4ERR_GRACE: /* loca_recalim always false */
6059 task->tk_status = 0;
6060 }
6061
6062 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6063 rpc_restart_call_prepare(task);
863a3c6c
AA		 6064 return;
6065 }
6066
6067 if (task->tk_status == 0)
6068 nfs_post_op_update_inode_force_wcc(data->args.inode,
6069 data->res.fattr);
6070}
6071
6072static void nfs4_layoutcommit_release(void *calldata)
6073{
6074 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6075 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6076 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6077
db29c089 6078 pnfs_cleanup_layoutcommit(data);
863a3c6c 6079 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6080 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6081 list_del_init(&lseg->pls_lc_list);
6082 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6083 &lseg->pls_flags))
6084 put_lseg(lseg);
6085 }
92407e75
PT		 6086
6087 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6088 smp_mb__after_clear_bit();
6089 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6090
863a3c6c
AA		 6091 put_rpccred(data->cred);
6092 kfree(data);
6093}
6094
6095static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6096 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6097 .rpc_call_done = nfs4_layoutcommit_done,
6098 .rpc_release = nfs4_layoutcommit_release,
6099};
6100
6101int
ef311537 6102nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6103{
6104 struct rpc_message msg = {
6105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6106 .rpc_argp = &data->args,
6107 .rpc_resp = &data->res,
6108 .rpc_cred = data->cred,
6109 };
6110 struct rpc_task_setup task_setup_data = {
6111 .task = &data->task,
6112 .rpc_client = NFS_CLIENT(data->args.inode),
6113 .rpc_message = &msg,
6114 .callback_ops = &nfs4_layoutcommit_ops,
6115 .callback_data = data,
6116 .flags = RPC_TASK_ASYNC,
6117 };
6118 struct rpc_task *task;
6119 int status = 0;
6120
6121 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6122 "lbw: %llu inode %lu\n",
6123 data->task.tk_pid, sync,
6124 data->args.lastbytewritten,
6125 data->args.inode->i_ino);
6126
9d12b216 6127 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6128 task = rpc_run_task(&task_setup_data);
6129 if (IS_ERR(task))
6130 return PTR_ERR(task);
ef311537 6131 if (sync == false)
863a3c6c
AA		 6132 goto out;
6133 status = nfs4_wait_for_completion_rpc_task(task);
6134 if (status != 0)
6135 goto out;
6136 status = task->tk_status;
6137out:
6138 dprintk("%s: status %d\n", __func__, status);
6139 rpc_put_task(task);
6140 return status;
6141}
fca78d6d
BS		 6142
6143static int
6144_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6145 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6146{
6147 struct nfs41_secinfo_no_name_args args = {
6148 .style = SECINFO_STYLE_CURRENT_FH,
6149 };
6150 struct nfs4_secinfo_res res = {
6151 .flavors = flavors,
6152 };
6153 struct rpc_message msg = {
6154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6155 .rpc_argp = &args,
6156 .rpc_resp = &res,
6157 };
6158 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6159}
6160
6161static int
6162nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6163 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6164{
6165 struct nfs4_exception exception = { };
6166 int err;
6167 do {
6168 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6169 switch (err) {
6170 case 0:
6171 case -NFS4ERR_WRONGSEC:
6172 case -NFS4ERR_NOTSUPP:
6173 break;
6174 default:
6175 err = nfs4_handle_exception(server, err, &exception);
6176 }
6177 } while (exception.retry);
6178 return err;
6179}
6180
6181static int
6182nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6183 struct nfs_fsinfo *info)
6184{
6185 int err;
6186 struct page *page;
6187 rpc_authflavor_t flavor;
6188 struct nfs4_secinfo_flavors *flavors;
6189
6190 page = alloc_page(GFP_KERNEL);
6191 if (!page) {
6192 err = -ENOMEM;
6193 goto out;
6194 }
6195
6196 flavors = page_address(page);
6197 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6198
6199 /*
6200 * Fall back on "guess and check" method if
6201 * the server doesn't support SECINFO_NO_NAME
6202 */
6203 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6204 err = nfs4_find_root_sec(server, fhandle, info);
6205 goto out_freepage;
6206 }
6207 if (err)
6208 goto out_freepage;
6209
6210 flavor = nfs_find_best_sec(flavors);
6211 if (err == 0)
6212 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6213
6214out_freepage:
6215 put_page(page);
6216 if (err == -EACCES)
6217 return -EPERM;
6218out:
6219 return err;
6220}
1cab0652
BS		 6221
6222static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794 6223{
1cab0652 6224 int status;
7d974794 6225 struct nfs41_test_stateid_args args = {
1cab0652 6226 .stateid = stateid,
7d974794
BS		 6227 };
6228 struct nfs41_test_stateid_res res;
6229 struct rpc_message msg = {
6230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6231 .rpc_argp = &args,
6232 .rpc_resp = &res,
6233 };
1cab0652 6234
9d12b216 6235 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6236 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6237
6238 if (status == NFS_OK)
6239 return res.status;
6240 return status;
7d974794
BS		 6241}
6242
1cab0652 6243static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6244{
6245 struct nfs4_exception exception = { };
6246 int err;
6247 do {
6248 err = nfs4_handle_exception(server,
1cab0652 6249 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6250 &exception);
6251 } while (exception.retry);
6252 return err;
6253}
9aeda35f 6254
1cab0652 6255static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6256{
9aeda35f 6257 struct nfs41_free_stateid_args args = {
1cab0652 6258 .stateid = stateid,
9aeda35f
BS		 6259 };
6260 struct nfs41_free_stateid_res res;
6261 struct rpc_message msg = {
6262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6263 .rpc_argp = &args,
6264 .rpc_resp = &res,
6265 };
6266
9d12b216
TM		 6267 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6268 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6269}
6270
1cab0652 6271static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6272{
6273 struct nfs4_exception exception = { };
6274 int err;
6275 do {
6276 err = nfs4_handle_exception(server,
1cab0652 6277 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6278 &exception);
6279 } while (exception.retry);
6280 return err;
6281}
557134a3
AA		 6282#endif /* CONFIG_NFS_V4_1 */
6283
591d71cb 6284struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6285 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6286 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6287 .recover_open = nfs4_open_reclaim,
6288 .recover_lock = nfs4_lock_reclaim,
591d71cb 6289 .establish_clid = nfs4_init_clientid,
90a16617 6290 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6291};
6292
591d71cb
AA		 6293#if defined(CONFIG_NFS_V4_1)
6294struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6295 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6296 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6297 .recover_open = nfs4_open_reclaim,
6298 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6299 .establish_clid = nfs41_init_clientid,
b4b82607 6300 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6301 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6302};
6303#endif /* CONFIG_NFS_V4_1 */
6304
6305struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6306 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6307 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6308 .recover_open = nfs4_open_expired,
6309 .recover_lock = nfs4_lock_expired,
6310 .establish_clid = nfs4_init_clientid,
90a16617 6311 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6312};
6313
6314#if defined(CONFIG_NFS_V4_1)
6315struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6316 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6317 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6318 .recover_open = nfs41_open_expired,
6319 .recover_lock = nfs41_lock_expired,
4d643d1d 6320 .establish_clid = nfs41_init_clientid,
b4b82607 6321 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6322};
591d71cb 6323#endif /* CONFIG_NFS_V4_1 */
1da177e4 6324
29fba38b
BH		 6325struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6326 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6327 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6328 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6329};
6330
6331#if defined(CONFIG_NFS_V4_1)
6332struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6333 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6334 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6335 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6336};
6337#endif
6338
97dc1359
TM		 6339static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6340 .minor_version = 0,
6341 .call_sync = _nfs4_call_sync,
e047a10c 6342 .validate_stateid = nfs4_validate_delegation_stateid,
fca78d6d 6343 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6344 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6345 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6346 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6347};
6348
6349#if defined(CONFIG_NFS_V4_1)
6350static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6351 .minor_version = 1,
6352 .call_sync = _nfs4_call_sync_session,
e047a10c 6353 .validate_stateid = nfs41_validate_delegation_stateid,
fca78d6d 6354 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6355 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6356 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6357 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6358};
6359#endif
6360
97dc1359
TM		 6361const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6362 [0] = &nfs_v4_0_minor_ops,
6363#if defined(CONFIG_NFS_V4_1)
6364 [1] = &nfs_v4_1_minor_ops,
6365#endif
6366};
6367
92e1d5be 6368static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6369 .permission = nfs_permission,
6370 .getattr = nfs_getattr,
6371 .setattr = nfs_setattr,
64c2ce8b
AK		 6372 .getxattr = generic_getxattr,
6373 .setxattr = generic_setxattr,
6374 .listxattr = generic_listxattr,
6375 .removexattr = generic_removexattr,
6b3b5496
BF		 6376};
6377
509de811 6378const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6379 .version = 4, /* protocol version */
6380 .dentry_ops = &nfs4_dentry_operations,
6381 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6382 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6383 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6384 .getroot = nfs4_proc_get_root,
6385 .getattr = nfs4_proc_getattr,
6386 .setattr = nfs4_proc_setattr,
6387 .lookup = nfs4_proc_lookup,
6388 .access = nfs4_proc_access,
6389 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6390 .create = nfs4_proc_create,
6391 .remove = nfs4_proc_remove,
6392 .unlink_setup = nfs4_proc_unlink_setup,
6393 .unlink_done = nfs4_proc_unlink_done,
6394 .rename = nfs4_proc_rename,
d3d4152a
JL		 6395 .rename_setup = nfs4_proc_rename_setup,
6396 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6397 .link = nfs4_proc_link,
6398 .symlink = nfs4_proc_symlink,
6399 .mkdir = nfs4_proc_mkdir,
6400 .rmdir = nfs4_proc_remove,
6401 .readdir = nfs4_proc_readdir,
6402 .mknod = nfs4_proc_mknod,
6403 .statfs = nfs4_proc_statfs,
6404 .fsinfo = nfs4_proc_fsinfo,
6405 .pathconf = nfs4_proc_pathconf,
e9326dca 6406 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6407 .decode_dirent = nfs4_decode_dirent,
6408 .read_setup = nfs4_proc_read_setup,
ec06c096 6409 .read_done = nfs4_read_done,
1da177e4 6410 .write_setup = nfs4_proc_write_setup,
788e7a89 6411 .write_done = nfs4_write_done,
1da177e4 6412 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6413 .commit_done = nfs4_commit_done,
1da177e4 6414 .lock = nfs4_proc_lock,
e50a1c2e 6415 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6416 .close_context = nfs4_close_context,
2b484297 6417 .open_context = nfs4_atomic_open,
45a52a02 6418 .init_client = nfs4_init_client,
5a5ea0d4 6419 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6420};
6421
64c2ce8b
AK		 6422static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6423 .prefix = XATTR_NAME_NFSV4_ACL,
6424 .list = nfs4_xattr_list_nfs4_acl,
6425 .get = nfs4_xattr_get_nfs4_acl,
6426 .set = nfs4_xattr_set_nfs4_acl,
6427};
6428
6429const struct xattr_handler *nfs4_xattr_handlers[] = {
6430 &nfs4_xattr_nfs4_acl_handler,
6431 NULL
6432};
6433
ef159e91
TM		 6434module_param(max_session_slots, ushort, 0644);
6435MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6436 "requests the client will negotiate");
6437
1da177e4
LT		 6438/*
6439 * Local variables:
6440 * c-basic-offset: 8
6441 * End:
6442 */
Linux 6.x block layer and io_uring tree(s)