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NFSv4: Move nfs4_wait_clnt_recover and nfs4_client_recover_expired_lease
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
cdd4e68b 73struct nfs4_opendata;
864472e9 74static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 75static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 76static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 77static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 78static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 79static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 80static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 81static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
82 struct nfs_fattr *fattr, struct iattr *sattr,
83 struct nfs4_state *state);
f062eb6c 84#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 85static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
86static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 87#endif
1da177e4 88/* Prevent leaks of NFSv4 errors into userland */
46f72f57 89static int nfs4_map_errors(int err)
1da177e4 90{
52567b03
TM		 91 if (err >= -1000)
92 return err;
93 switch (err) {
94 case -NFS4ERR_RESOURCE:
95 return -EREMOTEIO;
7ebb9315
BS		 96 case -NFS4ERR_WRONGSEC:
97 return -EPERM;
3ddeb7c5
TM		 98 case -NFS4ERR_BADOWNER:
99 case -NFS4ERR_BADNAME:
100 return -EINVAL;
fb13bfa7
TM		 101 case -NFS4ERR_SHARE_DENIED:
102 return -EACCES;
f25efd85
SD		 103 case -NFS4ERR_MINOR_VERS_MISMATCH:
104 return -EPROTONOSUPPORT;
6168f62c
WAA		 105 case -NFS4ERR_ACCESS:
106 return -EACCES;
52567b03 107 default:
1da177e4 108 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 109 __func__, -err);
52567b03 110 break;
1da177e4 111 }
52567b03 112 return -EIO;
1da177e4
LT		 113}
114
115/*
116 * This is our standard bitmap for GETATTR requests.
117 */
1549210f 118const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 119 FATTR4_WORD0_TYPE
120 | FATTR4_WORD0_CHANGE
121 | FATTR4_WORD0_SIZE
122 | FATTR4_WORD0_FSID
123 | FATTR4_WORD0_FILEID,
124 FATTR4_WORD1_MODE
125 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
133};
134
1549210f
TM		 135static const u32 nfs4_pnfs_open_bitmap[3] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID,
141 FATTR4_WORD1_MODE
142 | FATTR4_WORD1_NUMLINKS
143 | FATTR4_WORD1_OWNER
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
151};
152
e23008ec
AA		 153static const u32 nfs4_open_noattr_bitmap[3] = {
154 FATTR4_WORD0_TYPE
155 | FATTR4_WORD0_CHANGE
156 | FATTR4_WORD0_FILEID,
157};
158
1da177e4
LT		 159const u32 nfs4_statfs_bitmap[2] = {
160 FATTR4_WORD0_FILES_AVAIL
161 | FATTR4_WORD0_FILES_FREE
162 | FATTR4_WORD0_FILES_TOTAL,
163 FATTR4_WORD1_SPACE_AVAIL
164 | FATTR4_WORD1_SPACE_FREE
165 | FATTR4_WORD1_SPACE_TOTAL
166};
167
4ce79717 168const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 169 FATTR4_WORD0_MAXLINK
170 | FATTR4_WORD0_MAXNAME,
171 0
172};
173
dae100c2 174const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 175 | FATTR4_WORD0_MAXREAD
176 | FATTR4_WORD0_MAXWRITE
177 | FATTR4_WORD0_LEASE_TIME,
55b6e774 178 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 179 | FATTR4_WORD1_FS_LAYOUT_TYPES,
180 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 181};
182
830b8e33
MN		 183const u32 nfs4_fs_locations_bitmap[2] = {
184 FATTR4_WORD0_TYPE
185 | FATTR4_WORD0_CHANGE
186 | FATTR4_WORD0_SIZE
187 | FATTR4_WORD0_FSID
188 | FATTR4_WORD0_FILEID
189 | FATTR4_WORD0_FS_LOCATIONS,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID
200};
201
bc4785cd 202static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 203 struct nfs4_readdir_arg *readdir)
204{
0dbb4c67 205 __be32 *start, *p;
1da177e4 206
1da177e4 207 if (cookie > 2) {
b7ef1956 208 readdir->cookie = cookie;
1da177e4
LT		 209 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
210 return;
211 }
212
213 readdir->cookie = 0;
214 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
215 if (cookie == 2)
216 return;
217
218 /*
219 * NFSv4 servers do not return entries for '.' and '..'
220 * Therefore, we fake these entries here. We let '.'
221 * have cookie 0 and '..' have cookie 1. Note that
222 * when talking to the server, we always send cookie 0
223 * instead of 1 or 2.
224 */
2b86ce2d 225 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 226
227 if (cookie == 0) {
228 *p++ = xdr_one; /* next */
229 *p++ = xdr_zero; /* cookie, first word */
230 *p++ = xdr_one; /* cookie, second word */
231 *p++ = xdr_one; /* entry len */
232 memcpy(p, ".\0\0\0", 4); /* entry */
233 p++;
234 *p++ = xdr_one; /* bitmap length */
235 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
236 *p++ = htonl(8); /* attribute buffer length */
4e769b93 237 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 238 }
239
240 *p++ = xdr_one; /* next */
241 *p++ = xdr_zero; /* cookie, first word */
242 *p++ = xdr_two; /* cookie, second word */
243 *p++ = xdr_two; /* entry len */
244 memcpy(p, "..\0\0", 4); /* entry */
245 p++;
246 *p++ = xdr_one; /* bitmap length */
247 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
248 *p++ = htonl(8); /* attribute buffer length */
4e769b93 249 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 250
251 readdir->pgbase = (char *)p - (char *)start;
252 readdir->count -= readdir->pgbase;
2b86ce2d 253 kunmap_atomic(start);
1da177e4
LT		 254}
255
65de872e
TM		 256static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
257{
258 int res = 0;
259
260 might_sleep();
261
262 if (*timeout <= 0)
263 *timeout = NFS4_POLL_RETRY_MIN;
264 if (*timeout > NFS4_POLL_RETRY_MAX)
265 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 266 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 267 if (fatal_signal_pending(current))
268 res = -ERESTARTSYS;
269 *timeout <<= 1;
270 return res;
271}
272
273/* This is the error handling routine for processes that are allowed
274 * to sleep.
275 */
b064eca2 276static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 277{
278 struct nfs_client *clp = server->nfs_client;
9e33bed5 279 struct nfs4_state *state = exception->state;
3114ea7a 280 struct inode *inode = exception->inode;
65de872e
TM		 281 int ret = errorcode;
282
283 exception->retry = 0;
284 switch(errorcode) {
285 case 0:
286 return 0;
3114ea7a 287 case -NFS4ERR_OPENMODE:
011e2a7f 288 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 289 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 290 exception->retry = 1;
291 return 0;
292 }
293 if (state == NULL)
294 break;
295 nfs4_schedule_stateid_recovery(server, state);
296 goto wait_on_recovery;
a1d0b5ee 297 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 298 case -NFS4ERR_ADMIN_REVOKED:
299 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 300 if (state == NULL)
301 break;
14977489 302 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 303 nfs4_schedule_stateid_recovery(server, state);
304 goto wait_on_recovery;
0ced63d1
TM		 305 case -NFS4ERR_EXPIRED:
306 if (state != NULL)
307 nfs4_schedule_stateid_recovery(server, state);
65de872e 308 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 309 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 310 nfs4_schedule_lease_recovery(clp);
311 goto wait_on_recovery;
03391693 312#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 313 case -NFS4ERR_BADSESSION:
314 case -NFS4ERR_BADSLOT:
315 case -NFS4ERR_BAD_HIGH_SLOT:
316 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
317 case -NFS4ERR_DEADSESSION:
318 case -NFS4ERR_SEQ_FALSE_RETRY:
319 case -NFS4ERR_SEQ_MISORDERED:
320 dprintk("%s ERROR: %d Reset session\n", __func__,
321 errorcode);
9f594791 322 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 323 goto wait_on_recovery;
03391693 324#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 325 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 326 if (exception->timeout > HZ) {
327 /* We have retried a decent amount, time to
328 * fail
329 */
330 ret = -EBUSY;
331 break;
332 }
65de872e
TM		 333 case -NFS4ERR_GRACE:
334 case -NFS4ERR_DELAY:
2c643488 335 case -EKEYEXPIRED:
65de872e
TM		 336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
87dda67e
TM		 381/*
382 * nfs4_shrink_slot_table - free retired slots from the slot table
383 */
384static void nfs4_shrink_slot_table(struct nfs4_slot_table *tbl, u32 newsize)
385{
386 struct nfs4_slot **p;
387 if (newsize >= tbl->max_slots)
388 return;
389
390 p = &tbl->slots;
391 while (newsize--)
392 p = &(*p)->next;
393 while (*p) {
394 struct nfs4_slot *slot = *p;
395
396 *p = slot->next;
397 kfree(slot);
398 tbl->max_slots--;
399 }
400}
401
e2c4ab3c
AA		 402/*
403 * nfs4_free_slot - free a slot and efficiently update slot table.
404 *
405 * freeing a slot is trivially done by clearing its respective bit
406 * in the bitmap.
407 * If the freed slotid equals highest_used_slotid we want to update it
408 * so that the server would be able to size down the slot table if needed,
409 * otherwise we know that the highest_used_slotid is still in use.
410 * When updating highest_used_slotid there may be "holes" in the bitmap
411 * so we need to scan down from highest_used_slotid to 0 looking for the now
412 * highest slotid in use.
45d43c29 413 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 414 *
415 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 416 */
417static void
f4af6e2a 418nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
e2c4ab3c 419{
f4af6e2a
TM		 420 u32 slotid = slot->slot_nr;
421
e2c4ab3c
AA		 422 /* clear used bit in bitmap */
423 __clear_bit(slotid, tbl->used_slots);
424
425 /* update highest_used_slotid when it is freed */
426 if (slotid == tbl->highest_used_slotid) {
f4af6e2a
TM		 427 u32 new_max = find_last_bit(tbl->used_slots, slotid);
428 if (new_max < slotid)
429 tbl->highest_used_slotid = new_max;
5d63360d 430 else {
45d43c29 431 tbl->highest_used_slotid = NFS4_NO_SLOT;
5d63360d
TM		 432 nfs4_session_drain_complete(tbl->session, tbl);
433 }
e2c4ab3c 434 }
45d43c29
TM		 435 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
436 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 437}
438
961a828d
TM		 439bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
440{
441 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
442 return true;
e2c4ab3c
AA		 443}
444
d185a334 445static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 446{
e3725ec0 447 struct nfs4_session *session;
13615871
AA		 448 struct nfs4_slot_table *tbl;
449
dfb4f309 450 if (!res->sr_slot) {
13615871
AA		 451 /* just wake up the next guy waiting since
452 * we may have not consumed a slot after all */
691daf3b 453 dprintk("%s: No slot\n", __func__);
35dc1d74 454 return;
13615871 455 }
e3725ec0
TM		 456 tbl = res->sr_slot->table;
457 session = tbl->session;
ea028ac9 458
35dc1d74 459 spin_lock(&tbl->slot_tbl_lock);
f4af6e2a 460 nfs4_free_slot(tbl, res->sr_slot);
5d63360d
TM		 461 if (!nfs4_session_draining(session))
462 rpc_wake_up_first(&tbl->slot_tbl_waitq,
463 nfs4_set_task_privileged, NULL);
35dc1d74 464 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 465 res->sr_slot = NULL;
13615871
AA		 466}
467
464ee9f9
TM		 468/* Update the client's idea of target_highest_slotid */
469static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
470 u32 target_highest_slotid)
471{
97e548a9
TM		 472 unsigned int max_slotid, i;
473
464ee9f9
TM		 474 if (tbl->target_highest_slotid == target_highest_slotid)
475 return;
476 tbl->target_highest_slotid = target_highest_slotid;
477 tbl->generation++;
97e548a9 478
87dda67e 479 max_slotid = min(NFS4_MAX_SLOT_TABLE - 1, tbl->target_highest_slotid);
97e548a9
TM		 480 for (i = tbl->max_slotid + 1; i <= max_slotid; i++)
481 rpc_wake_up_next(&tbl->slot_tbl_waitq);
482 tbl->max_slotid = max_slotid;
464ee9f9
TM		 483}
484
ce008c4b
TM		 485void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
486 u32 target_highest_slotid)
487{
488 spin_lock(&tbl->slot_tbl_lock);
489 nfs41_set_target_slotid_locked(tbl, target_highest_slotid);
490 spin_unlock(&tbl->slot_tbl_lock);
491}
492
da0507b7
TM		 493static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl,
494 u32 highest_slotid)
495{
da0507b7
TM		 496 if (tbl->server_highest_slotid == highest_slotid)
497 return;
498 if (tbl->highest_used_slotid > highest_slotid)
499 return;
87dda67e
TM		 500 /* Deallocate slots */
501 nfs4_shrink_slot_table(tbl, highest_slotid + 1);
da0507b7
TM		 502 tbl->server_highest_slotid = highest_slotid;
503}
504
464ee9f9
TM		 505static void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
506 struct nfs4_slot *slot,
507 struct nfs4_sequence_res *res)
508{
509 spin_lock(&tbl->slot_tbl_lock);
510 if (tbl->generation != slot->generation)
511 goto out;
da0507b7 512 nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid);
464ee9f9
TM		 513 nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid);
514out:
515 spin_unlock(&tbl->slot_tbl_lock);
516}
517
14516c3a 518static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 519{
e3725ec0 520 struct nfs4_session *session;
933602e3 521 struct nfs4_slot *slot;
b0df806c 522 unsigned long timestamp;
14516c3a 523 struct nfs_client *clp;
b0df806c
AA		 524
525 /*
526 * sr_status remains 1 if an RPC level error occurred. The server
527 * may or may not have processed the sequence operation..
528 * Proceed as if the server received and processed the sequence
529 * operation.
530 */
531 if (res->sr_status == 1)
532 res->sr_status = NFS_OK;
533
468f8613
BS		 534 /* don't increment the sequence number if the task wasn't sent */
535 if (!RPC_WAS_SENT(task))
b0df806c
AA		 536 goto out;
537
933602e3 538 slot = res->sr_slot;
e3725ec0 539 session = slot->table->session;
933602e3 540
691daf3b 541 /* Check the SEQUENCE operation status */
14516c3a
TM		 542 switch (res->sr_status) {
543 case 0:
b0df806c 544 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 545 ++slot->seq_nr;
546 timestamp = slot->renewal_time;
e3725ec0 547 clp = session->clp;
452e9352 548 do_renew_lease(clp, timestamp);
0629e370 549 /* Check sequence flags */
b4410c2f
TM		 550 if (res->sr_status_flags != 0)
551 nfs4_schedule_lease_recovery(clp);
464ee9f9 552 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a
TM		 553 break;
554 case -NFS4ERR_DELAY:
555 /* The server detected a resend of the RPC call and
556 * returned NFS4ERR_DELAY as per Section 2.10.6.2
557 * of RFC5661.
558 */
df2fabff 559 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 560 __func__,
df2fabff 561 slot->slot_nr,
933602e3 562 slot->seq_nr);
14516c3a
TM		 563 goto out_retry;
564 default:
565 /* Just update the slot sequence no. */
933602e3 566 ++slot->seq_nr;
b0df806c
AA		 567 }
568out:
569 /* The session may be reset by one of the error handlers. */
570 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 571 nfs41_sequence_free_slot(res);
14516c3a
TM		 572 return 1;
573out_retry:
d05dd4e9 574 if (!rpc_restart_call(task))
14516c3a
TM		 575 goto out;
576 rpc_delay(task, NFS4_POLL_RETRY_MAX);
577 return 0;
b0df806c
AA		 578}
579
14516c3a
TM		 580static int nfs4_sequence_done(struct rpc_task *task,
581 struct nfs4_sequence_res *res)
df896455 582{
e3725ec0 583 if (res->sr_slot == NULL)
14516c3a
TM		 584 return 1;
585 return nfs41_sequence_done(task, res);
df896455
TM		 586}
587
87dda67e
TM		 588static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table *tbl,
589 u32 slotid, u32 seq_init, gfp_t gfp_mask)
590{
591 struct nfs4_slot *slot;
592
593 slot = kzalloc(sizeof(*slot), gfp_mask);
594 if (slot) {
595 slot->table = tbl;
596 slot->slot_nr = slotid;
597 slot->seq_nr = seq_init;
598 }
599 return slot;
600}
601
602static struct nfs4_slot *nfs4_find_or_create_slot(struct nfs4_slot_table *tbl,
603 u32 slotid, u32 seq_init, gfp_t gfp_mask)
604{
605 struct nfs4_slot **p, *slot;
606
607 p = &tbl->slots;
608 for (;;) {
609 if (*p == NULL) {
610 *p = nfs4_new_slot(tbl, tbl->max_slots,
611 seq_init, gfp_mask);
612 if (*p == NULL)
613 break;
614 tbl->max_slots++;
615 }
616 slot = *p;
617 if (slot->slot_nr == slotid)
618 return slot;
619 p = &slot->next;
620 }
69d206b5 621 return ERR_PTR(-ENOMEM);
87dda67e
TM		 622}
623
510b8175 624/*
2dc03b7f 625 * nfs4_alloc_slot - efficiently look for a free slot
510b8175 626 *
2dc03b7f 627 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
510b8175
BH		 628 * If found, we mark the slot as used, update the highest_used_slotid,
629 * and respectively set up the sequence operation args.
fbcd4abc
AA		 630 *
631 * Note: must be called with under the slot_tbl_lock.
510b8175 632 */
2dc03b7f 633static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
510b8175 634{
69d206b5 635 struct nfs4_slot *ret = ERR_PTR(-EBUSY);
45d43c29 636 u32 slotid;
510b8175 637
45d43c29 638 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175 639 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
87dda67e 640 tbl->max_slotid + 1);
97e548a9
TM		 641 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1);
642 if (slotid > tbl->max_slotid)
510b8175 643 goto out;
87dda67e 644 ret = nfs4_find_or_create_slot(tbl, slotid, 1, GFP_NOWAIT);
69d206b5 645 if (IS_ERR(ret))
87dda67e 646 goto out;
510b8175 647 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 648 if (slotid > tbl->highest_used_slotid ||
649 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175 650 tbl->highest_used_slotid = slotid;
2dc03b7f 651 ret->renewal_time = jiffies;
464ee9f9 652 ret->generation = tbl->generation;
2dc03b7f 653
510b8175
BH		 654out:
655 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
2dc03b7f 656 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
69d206b5 657 !IS_ERR(ret) ? ret->slot_nr : -1);
2dc03b7f 658 return ret;
510b8175
BH		 659}
660
9d12b216
TM		 661static void nfs41_init_sequence(struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res, int cache_reply)
663{
2b2fa717 664 args->sa_slot = NULL;
9d12b216
TM		 665 args->sa_cache_this = 0;
666 if (cache_reply)
667 args->sa_cache_this = 1;
9d12b216
TM		 668 res->sr_slot = NULL;
669}
670
dc70d7b3 671int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 672 struct nfs4_sequence_args *args,
673 struct nfs4_sequence_res *res,
ce5039c1
AA		 674 struct rpc_task *task)
675{
fbcd4abc
AA		 676 struct nfs4_slot *slot;
677 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 678
679 dprintk("--> %s\n", __func__);
ce5039c1 680 /* slot already allocated? */
dfb4f309 681 if (res->sr_slot != NULL)
ce5039c1
AA		 682 return 0;
683
fbcd4abc
AA		 684 tbl = &session->fc_slot_table;
685
69d206b5
TM		 686 task->tk_timeout = 0;
687
fbcd4abc 688 spin_lock(&tbl->slot_tbl_lock);
a2118c33 689 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 690 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 691 /* The state manager will wait until the slot table is empty */
05f0d236 692 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 693 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 694 dprintk("%s session is draining\n", __func__);
05f0d236 695 return -EAGAIN;
b069d94a
AA		 696 }
697
689cf5c1
AB		 698 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
699 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
700 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
701 spin_unlock(&tbl->slot_tbl_lock);
702 dprintk("%s enforce FIFO order\n", __func__);
703 return -EAGAIN;
704 }
705
2dc03b7f 706 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 707 if (IS_ERR(slot)) {
708 /* If out of memory, try again in 1/4 second */
709 if (slot == ERR_PTR(-ENOMEM))
710 task->tk_timeout = HZ >> 2;
fbcd4abc
AA		 711 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
712 spin_unlock(&tbl->slot_tbl_lock);
713 dprintk("<-- %s: no free slots\n", __func__);
714 return -EAGAIN;
715 }
716 spin_unlock(&tbl->slot_tbl_lock);
717
689cf5c1 718 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
2b2fa717
TM		 719
720 args->sa_slot = slot;
fbcd4abc 721
2dc03b7f
TM		 722 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
723 slot->slot_nr, slot->seq_nr);
fbcd4abc 724
dfb4f309 725 res->sr_slot = slot;
2a6e26cd 726 res->sr_status_flags = 0;
fbcd4abc
AA		 727 /*
728 * sr_status is only set in decode_sequence, and so will remain
729 * set to 1 if an rpc level failure occurs.
730 */
731 res->sr_status = 1;
ce5039c1
AA		 732 return 0;
733}
dc70d7b3 734EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 735
035168ab 736int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 737 struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res,
ce5039c1
AA		 739 struct rpc_task *task)
740{
035168ab 741 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 742 int ret = 0;
743
9d12b216 744 if (session == NULL)
035168ab 745 goto out;
035168ab 746
df2fabff 747 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 748 __func__, session->clp, session, res->sr_slot ?
df2fabff 749 res->sr_slot->slot_nr : -1);
ce5039c1 750
9d12b216 751 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 752out:
753 dprintk("<-- %s status=%d\n", __func__, ret);
754 return ret;
755}
756
757struct nfs41_call_sync_data {
035168ab 758 const struct nfs_server *seq_server;
ce5039c1
AA		 759 struct nfs4_sequence_args *seq_args;
760 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 761};
762
763static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
764{
765 struct nfs41_call_sync_data *data = calldata;
766
035168ab
TM		 767 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
768
769 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 770 data->seq_res, task))
ce5039c1
AA		 771 return;
772 rpc_call_start(task);
773}
774
b257957e
AB		 775static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
776{
777 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
778 nfs41_call_sync_prepare(task, calldata);
779}
780
69ab40c4
AA		 781static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
782{
783 struct nfs41_call_sync_data *data = calldata;
784
14516c3a 785 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 786}
787
17280175 788static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 789 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 790 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 791};
792
17280175 793static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 794 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
795 .rpc_call_done = nfs41_call_sync_done,
796};
797
7c513058
BS		 798static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
799 struct nfs_server *server,
ce5039c1
AA		 800 struct rpc_message *msg,
801 struct nfs4_sequence_args *args,
802 struct nfs4_sequence_res *res,
b257957e 803 int privileged)
ce5039c1
AA		 804{
805 int ret;
806 struct rpc_task *task;
807 struct nfs41_call_sync_data data = {
035168ab 808 .seq_server = server,
ce5039c1
AA		 809 .seq_args = args,
810 .seq_res = res,
ce5039c1
AA		 811 };
812 struct rpc_task_setup task_setup = {
7c513058 813 .rpc_client = clnt,
ce5039c1
AA		 814 .rpc_message = msg,
815 .callback_ops = &nfs41_call_sync_ops,
816 .callback_data = &data
817 };
818
b257957e
AB		 819 if (privileged)
820 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 821 task = rpc_run_task(&task_setup);
822 if (IS_ERR(task))
823 ret = PTR_ERR(task);
824 else {
825 ret = task->tk_status;
826 rpc_put_task(task);
827 }
828 return ret;
829}
830
7c513058
BS		 831int _nfs4_call_sync_session(struct rpc_clnt *clnt,
832 struct nfs_server *server,
cccef3b9
AA		 833 struct rpc_message *msg,
834 struct nfs4_sequence_args *args,
835 struct nfs4_sequence_res *res,
836 int cache_reply)
837{
9d12b216
TM		 838 nfs41_init_sequence(args, res, cache_reply);
839 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 840}
841
df896455 842#else
9d12b216
TM		 843static inline
844void nfs41_init_sequence(struct nfs4_sequence_args *args,
845 struct nfs4_sequence_res *res, int cache_reply)
846{
847}
848
14516c3a
TM		 849static int nfs4_sequence_done(struct rpc_task *task,
850 struct nfs4_sequence_res *res)
df896455 851{
14516c3a 852 return 1;
df896455 853}
cccef3b9
AA		 854#endif /* CONFIG_NFS_V4_1 */
855
7c513058
BS		 856int _nfs4_call_sync(struct rpc_clnt *clnt,
857 struct nfs_server *server,
cccef3b9
AA		 858 struct rpc_message *msg,
859 struct nfs4_sequence_args *args,
860 struct nfs4_sequence_res *res,
861 int cache_reply)
862{
9d12b216 863 nfs41_init_sequence(args, res, cache_reply);
7c513058 864 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 865}
866
e73b83f2 867static inline
7c513058
BS		 868int nfs4_call_sync(struct rpc_clnt *clnt,
869 struct nfs_server *server,
e73b83f2
BS		 870 struct rpc_message *msg,
871 struct nfs4_sequence_args *args,
872 struct nfs4_sequence_res *res,
873 int cache_reply)
874{
7c513058
BS		 875 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
876 args, res, cache_reply);
e73b83f2 877}
cccef3b9 878
38478b24 879static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 880{
38478b24 881 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 882
38478b24 883 spin_lock(&dir->i_lock);
359d7d1c 884 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 885 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 886 nfs_force_lookup_revalidate(dir);
a9a4a87a 887 dir->i_version = cinfo->after;
38478b24 888 spin_unlock(&dir->i_lock);
1da177e4
LT		 889}
890
e56e0b78 891struct nfs4_opendata {
c6d00e63 892 struct kref kref;
e56e0b78
TM		 893 struct nfs_openargs o_arg;
894 struct nfs_openres o_res;
cdd4e68b
TM		 895 struct nfs_open_confirmargs c_arg;
896 struct nfs_open_confirmres c_res;
6926afd1
TM		 897 struct nfs4_string owner_name;
898 struct nfs4_string group_name;
e56e0b78 899 struct nfs_fattr f_attr;
e56e0b78 900 struct dentry *dir;
82a2c1b7 901 struct dentry *dentry;
e56e0b78 902 struct nfs4_state_owner *owner;
aac00a8d 903 struct nfs4_state *state;
e56e0b78 904 struct iattr attrs;
26e976a8 905 unsigned long timestamp;
3e309914 906 unsigned int rpc_done : 1;
24ac23ab
TM		 907 int rpc_status;
908 int cancelled;
e56e0b78
TM		 909};
910
2ced46c2
TM		 911
912static void nfs4_init_opendata_res(struct nfs4_opendata *p)
913{
914 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 915 p->o_res.seqid = p->o_arg.seqid;
916 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 917 p->o_res.server = p->o_arg.server;
5f657530 918 p->o_res.access_request = p->o_arg.access;
2ced46c2 919 nfs_fattr_init(&p->f_attr);
6926afd1 920 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 921}
922
82a2c1b7 923static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 924 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 925 const struct iattr *attrs,
926 gfp_t gfp_mask)
e56e0b78 927{
82a2c1b7 928 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 929 struct inode *dir = parent->d_inode;
930 struct nfs_server *server = NFS_SERVER(dir);
931 struct nfs4_opendata *p;
932
8535b2be 933 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 934 if (p == NULL)
935 goto err;
8535b2be 936 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 937 if (p->o_arg.seqid == NULL)
938 goto err_free;
82a2c1b7
AV		 939 nfs_sb_active(dentry->d_sb);
940 p->dentry = dget(dentry);
e56e0b78
TM		 941 p->dir = parent;
942 p->owner = sp;
943 atomic_inc(&sp->so_count);
944 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 945 p->o_arg.open_flags = flags;
946 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 947 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
948 * will return permission denied for all bits until close */
949 if (!(flags & O_EXCL)) {
950 /* ask server to check for all possible rights as results
951 * are cached */
952 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
953 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 954 }
7539bbab 955 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 956 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
957 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 958 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 959 p->o_arg.server = server;
960 p->o_arg.bitmask = server->attr_bitmask;
1549210f 961 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 962 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 963 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 964 __be32 verf[2];
d77d76ff 965
e56e0b78
TM		 966 p->o_arg.u.attrs = &p->attrs;
967 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 968
969 verf[0] = jiffies;
970 verf[1] = current->pid;
971 memcpy(p->o_arg.u.verifier.data, verf,
972 sizeof(p->o_arg.u.verifier.data));
e56e0b78 973 }
cdd4e68b
TM		 974 p->c_arg.fh = &p->o_res.fh;
975 p->c_arg.stateid = &p->o_res.stateid;
976 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 977 nfs4_init_opendata_res(p);
c6d00e63 978 kref_init(&p->kref);
e56e0b78
TM		 979 return p;
980err_free:
981 kfree(p);
982err:
983 dput(parent);
984 return NULL;
985}
986
c6d00e63 987static void nfs4_opendata_free(struct kref *kref)
e56e0b78 988{
c6d00e63
TM		 989 struct nfs4_opendata *p = container_of(kref,
990 struct nfs4_opendata, kref);
82a2c1b7 991 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 992
993 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 994 if (p->state != NULL)
995 nfs4_put_open_state(p->state);
c6d00e63
TM		 996 nfs4_put_state_owner(p->owner);
997 dput(p->dir);
82a2c1b7
AV		 998 dput(p->dentry);
999 nfs_sb_deactive(sb);
6926afd1 1000 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1001 kfree(p);
1002}
1003
1004static void nfs4_opendata_put(struct nfs4_opendata *p)
1005{
1006 if (p != NULL)
1007 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1008}
1009
06f814a3
TM		 1010static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1011{
06f814a3
TM		 1012 int ret;
1013
06f814a3 1014 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1015 return ret;
1016}
1017
dc0b027d 1018static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1019{
1020 int ret = 0;
dc0b027d 1021
536e43d1 1022 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1023 goto out;
1024 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1025 case FMODE_READ:
88069f77
TM		 1026 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1027 && state->n_rdonly != 0;
6ee41268
TM		 1028 break;
1029 case FMODE_WRITE:
88069f77
TM		 1030 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1031 && state->n_wronly != 0;
6ee41268
TM		 1032 break;
1033 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1034 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1035 && state->n_rdwr != 0;
6ee41268 1036 }
dc0b027d 1037out:
6ee41268
TM		 1038 return ret;
1039}
1040
dc0b027d 1041static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1042{
652f89f6
TM		 1043 if (delegation == NULL)
1044 return 0;
dc0b027d 1045 if ((delegation->type & fmode) != fmode)
aac00a8d 1046 return 0;
15c831bf 1047 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1048 return 0;
b7391f44 1049 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1050 return 1;
1051}
1052
dc0b027d 1053static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1054{
dc0b027d 1055 switch (fmode) {
e7616923
TM		 1056 case FMODE_WRITE:
1057 state->n_wronly++;
1058 break;
1059 case FMODE_READ:
1060 state->n_rdonly++;
1061 break;
1062 case FMODE_READ|FMODE_WRITE:
1063 state->n_rdwr++;
1064 }
dc0b027d 1065 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1066}
1067
dc0b027d 1068static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1069{
1070 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1071 nfs4_stateid_copy(&state->stateid, stateid);
1072 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 1073 switch (fmode) {
003707c7
TM		 1074 case FMODE_READ:
1075 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1076 break;
1077 case FMODE_WRITE:
1078 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1079 break;
1080 case FMODE_READ|FMODE_WRITE:
1081 set_bit(NFS_O_RDWR_STATE, &state->flags);
1082 }
e7616923
TM		 1083}
1084
dc0b027d 1085static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1086{
8bda4e4c 1087 write_seqlock(&state->seqlock);
dc0b027d 1088 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1089 write_sequnlock(&state->seqlock);
003707c7
TM		 1090}
1091
dc0b027d 1092static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1093{
8bda4e4c
TM		 1094 /*
1095 * Protect the call to nfs4_state_set_mode_locked and
1096 * serialise the stateid update
1097 */
1098 write_seqlock(&state->seqlock);
003707c7 1099 if (deleg_stateid != NULL) {
f597c537 1100 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1101 set_bit(NFS_DELEGATED_STATE, &state->flags);
1102 }
1103 if (open_stateid != NULL)
dc0b027d 1104 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1105 write_sequnlock(&state->seqlock);
1106 spin_lock(&state->owner->so_lock);
dc0b027d 1107 update_open_stateflags(state, fmode);
ec073428 1108 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1109}
1110
dc0b027d 1111static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1112{
1113 struct nfs_inode *nfsi = NFS_I(state->inode);
1114 struct nfs_delegation *deleg_cur;
1115 int ret = 0;
1116
dc0b027d 1117 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1118
1119 rcu_read_lock();
1120 deleg_cur = rcu_dereference(nfsi->delegation);
1121 if (deleg_cur == NULL)
1122 goto no_delegation;
1123
1124 spin_lock(&deleg_cur->lock);
1125 if (nfsi->delegation != deleg_cur ||
dc0b027d 1126 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1127 goto no_delegation_unlock;
1128
1129 if (delegation == NULL)
1130 delegation = &deleg_cur->stateid;
f597c537 1131 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1132 goto no_delegation_unlock;
1133
b7391f44 1134 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1135 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1136 ret = 1;
1137no_delegation_unlock:
1138 spin_unlock(&deleg_cur->lock);
1139no_delegation:
1140 rcu_read_unlock();
1141
1142 if (!ret && open_stateid != NULL) {
dc0b027d 1143 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1144 ret = 1;
1145 }
1146
1147 return ret;
1148}
1149
1150
dc0b027d 1151static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1152{
1153 struct nfs_delegation *delegation;
1154
1155 rcu_read_lock();
1156 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1157 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1158 rcu_read_unlock();
1159 return;
1160 }
1161 rcu_read_unlock();
57ec14c5 1162 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1163}
1164
6ee41268 1165static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1166{
1167 struct nfs4_state *state = opendata->state;
1168 struct nfs_inode *nfsi = NFS_I(state->inode);
1169 struct nfs_delegation *delegation;
536e43d1 1170 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1171 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1172 nfs4_stateid stateid;
1173 int ret = -EAGAIN;
1174
aac00a8d 1175 for (;;) {
dc0b027d 1176 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1177 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1178 if (can_open_cached(state, fmode, open_mode)) {
1179 update_open_stateflags(state, fmode);
6ee41268 1180 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1181 goto out_return_state;
1182 }
1183 spin_unlock(&state->owner->so_lock);
1184 }
34310430
TM		 1185 rcu_read_lock();
1186 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1187 if (!can_open_delegated(delegation, fmode)) {
34310430 1188 rcu_read_unlock();
aac00a8d 1189 break;
34310430 1190 }
aac00a8d 1191 /* Save the delegation */
f597c537 1192 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1193 rcu_read_unlock();
af22f94a 1194 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1195 if (ret != 0)
1196 goto out;
1197 ret = -EAGAIN;
34310430
TM		 1198
1199 /* Try to update the stateid using the delegation */
dc0b027d 1200 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1201 goto out_return_state;
aac00a8d 1202 }
aac00a8d
TM		 1203out:
1204 return ERR_PTR(ret);
1205out_return_state:
1206 atomic_inc(&state->count);
1207 return state;
1208}
1209
e23008ec
AA		 1210static void
1211nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1212{
1213 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1214 struct nfs_delegation *delegation;
1215 int delegation_flags = 0;
1216
1217 rcu_read_lock();
1218 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1219 if (delegation)
1220 delegation_flags = delegation->flags;
1221 rcu_read_unlock();
1222 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1223 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1224 "returning a delegation for "
1225 "OPEN(CLAIM_DELEGATE_CUR)\n",
1226 clp->cl_hostname);
1227 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1228 nfs_inode_set_delegation(state->inode,
1229 data->owner->so_cred,
1230 &data->o_res);
1231 else
1232 nfs_inode_reclaim_delegation(state->inode,
1233 data->owner->so_cred,
1234 &data->o_res);
1235}
1236
1237/*
1238 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1239 * and update the nfs4_state.
1240 */
1241static struct nfs4_state *
1242_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1243{
1244 struct inode *inode = data->state->inode;
1245 struct nfs4_state *state = data->state;
1246 int ret;
1247
1248 if (!data->rpc_done) {
1249 ret = data->rpc_status;
1250 goto err;
1251 }
1252
1253 ret = -ESTALE;
1254 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1255 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1256 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1257 goto err;
1258
1259 ret = -ENOMEM;
1260 state = nfs4_get_open_state(inode, data->owner);
1261 if (state == NULL)
1262 goto err;
1263
1264 ret = nfs_refresh_inode(inode, &data->f_attr);
1265 if (ret)
1266 goto err;
1267
1268 if (data->o_res.delegation_type != 0)
1269 nfs4_opendata_check_deleg(data, state);
1270 update_open_stateid(state, &data->o_res.stateid, NULL,
1271 data->o_arg.fmode);
1272
1273 return state;
1274err:
1275 return ERR_PTR(ret);
1276
1277}
1278
1279static struct nfs4_state *
1280_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1281{
1282 struct inode *inode;
1283 struct nfs4_state *state = NULL;
1b370bc2 1284 int ret;
24ac23ab 1285
aac00a8d 1286 if (!data->rpc_done) {
6ee41268 1287 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1288 goto out;
1289 }
1290
1b370bc2 1291 ret = -EAGAIN;
24ac23ab 1292 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1293 goto err;
24ac23ab 1294 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1295 ret = PTR_ERR(inode);
03f28e3a 1296 if (IS_ERR(inode))
1b370bc2
TM		 1297 goto err;
1298 ret = -ENOMEM;
24ac23ab
TM		 1299 state = nfs4_get_open_state(inode, data->owner);
1300 if (state == NULL)
1b370bc2 1301 goto err_put_inode;
e23008ec
AA		 1302 if (data->o_res.delegation_type != 0)
1303 nfs4_opendata_check_deleg(data, state);
34310430 1304 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1305 data->o_arg.fmode);
24ac23ab 1306 iput(inode);
aac00a8d 1307out:
24ac23ab 1308 return state;
1b370bc2
TM		 1309err_put_inode:
1310 iput(inode);
1311err:
1312 return ERR_PTR(ret);
24ac23ab
TM		 1313}
1314
e23008ec
AA		 1315static struct nfs4_state *
1316nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1317{
1318 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1319 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1320 return _nfs4_opendata_to_nfs4_state(data);
1321}
1322
864472e9
TM		 1323static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1324{
1325 struct nfs_inode *nfsi = NFS_I(state->inode);
1326 struct nfs_open_context *ctx;
1327
1328 spin_lock(&state->inode->i_lock);
1329 list_for_each_entry(ctx, &nfsi->open_files, list) {
1330 if (ctx->state != state)
1331 continue;
1332 get_nfs_open_context(ctx);
1333 spin_unlock(&state->inode->i_lock);
1334 return ctx;
1335 }
1336 spin_unlock(&state->inode->i_lock);
1337 return ERR_PTR(-ENOENT);
1338}
1339
6f220ed5
TM		 1340static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1341{
1342 struct nfs4_opendata *opendata;
1343
3d4ff43d 1344 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1345 if (opendata == NULL)
1346 return ERR_PTR(-ENOMEM);
1347 opendata->state = state;
1348 atomic_inc(&state->count);
1349 return opendata;
1350}
1351
dc0b027d 1352static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1353{
2ced46c2 1354 struct nfs4_state *newstate;
864472e9
TM		 1355 int ret;
1356
dc0b027d
TM		 1357 opendata->o_arg.open_flags = 0;
1358 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1359 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1360 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1361 nfs4_init_opendata_res(opendata);
b257957e 1362 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1363 if (ret != 0)
1364 return ret;
2ced46c2 1365 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1366 if (IS_ERR(newstate))
1367 return PTR_ERR(newstate);
643168c2 1368 nfs4_close_state(newstate, fmode);
2ced46c2 1369 *res = newstate;
864472e9
TM		 1370 return 0;
1371}
1372
1373static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1374{
864472e9 1375 struct nfs4_state *newstate;
864472e9
TM		 1376 int ret;
1377
1378 /* memory barrier prior to reading state->n_* */
2ced46c2 1379 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1380 smp_rmb();
1381 if (state->n_rdwr != 0) {
b0ed9dbc 1382 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1383 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1384 if (ret != 0)
1385 return ret;
2ced46c2
TM		 1386 if (newstate != state)
1387 return -ESTALE;
864472e9
TM		 1388 }
1389 if (state->n_wronly != 0) {
b0ed9dbc 1390 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1391 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1392 if (ret != 0)
1393 return ret;
2ced46c2
TM		 1394 if (newstate != state)
1395 return -ESTALE;
864472e9
TM		 1396 }
1397 if (state->n_rdonly != 0) {
b0ed9dbc 1398 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1399 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1400 if (ret != 0)
1401 return ret;
2ced46c2
TM		 1402 if (newstate != state)
1403 return -ESTALE;
864472e9 1404 }
1ac7e2fd
TM		 1405 /*
1406 * We may have performed cached opens for all three recoveries.
1407 * Check if we need to update the current stateid.
1408 */
1409 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1410 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1411 write_seqlock(&state->seqlock);
1ac7e2fd 1412 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1413 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1414 write_sequnlock(&state->seqlock);
1ac7e2fd 1415 }
864472e9
TM		 1416 return 0;
1417}
1418
1da177e4
LT		 1419/*
1420 * OPEN_RECLAIM:
1421 * reclaim state on the server after a reboot.
1da177e4 1422 */
539cd03a 1423static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1424{
1ac7e2fd 1425 struct nfs_delegation *delegation;
864472e9 1426 struct nfs4_opendata *opendata;
dc0b027d 1427 fmode_t delegation_type = 0;
1da177e4
LT		 1428 int status;
1429
6f220ed5
TM		 1430 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1431 if (IS_ERR(opendata))
1432 return PTR_ERR(opendata);
864472e9
TM		 1433 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1434 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1435 rcu_read_lock();
1436 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1437 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1438 delegation_type = delegation->type;
1ac7e2fd 1439 rcu_read_unlock();
864472e9
TM		 1440 opendata->o_arg.u.delegation_type = delegation_type;
1441 status = nfs4_open_recover(opendata, state);
c6d00e63 1442 nfs4_opendata_put(opendata);
1da177e4
LT		 1443 return status;
1444}
1445
539cd03a 1446static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1447{
1448 struct nfs_server *server = NFS_SERVER(state->inode);
1449 struct nfs4_exception exception = { };
1450 int err;
1451 do {
539cd03a 1452 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1453 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1454 break;
1455 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1456 } while (exception.retry);
1457 return err;
1458}
1459
864472e9
TM		 1460static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1461{
1462 struct nfs_open_context *ctx;
1463 int ret;
1464
1465 ctx = nfs4_state_find_open_context(state);
1466 if (IS_ERR(ctx))
1467 return PTR_ERR(ctx);
539cd03a 1468 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1469 put_nfs_open_context(ctx);
1470 return ret;
1471}
1472
13437e12 1473static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1474{
e56e0b78 1475 struct nfs4_opendata *opendata;
864472e9 1476 int ret;
1da177e4 1477
6f220ed5
TM		 1478 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1479 if (IS_ERR(opendata))
1480 return PTR_ERR(opendata);
e56e0b78 1481 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1482 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1483 ret = nfs4_open_recover(opendata, state);
c6d00e63 1484 nfs4_opendata_put(opendata);
864472e9 1485 return ret;
1da177e4
LT		 1486}
1487
13437e12 1488int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1489{
1490 struct nfs4_exception exception = { };
539cd03a 1491 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1492 int err;
1493 do {
13437e12 1494 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1495 switch (err) {
1496 case 0:
965b5d67
TM		 1497 case -ENOENT:
1498 case -ESTALE:
1499 goto out;
bcfa49f6
RL		 1500 case -NFS4ERR_BADSESSION:
1501 case -NFS4ERR_BADSLOT:
1502 case -NFS4ERR_BAD_HIGH_SLOT:
1503 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1504 case -NFS4ERR_DEADSESSION:
9f594791 1505 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1506 goto out;
1da177e4
LT		 1507 case -NFS4ERR_STALE_CLIENTID:
1508 case -NFS4ERR_STALE_STATEID:
1509 case -NFS4ERR_EXPIRED:
1510 /* Don't recall a delegation if it was lost */
0400a6b0 1511 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1512 goto out;
1513 case -ERESTARTSYS:
1514 /*
1515 * The show must go on: exit, but mark the
1516 * stateid as needing recovery.
1517 */
a1d0b5ee 1518 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1519 case -NFS4ERR_ADMIN_REVOKED:
1520 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1521 nfs_inode_find_state_and_recover(state->inode,
1522 stateid);
0400a6b0 1523 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1524 case -EKEYEXPIRED:
1525 /*
1526 * User RPCSEC_GSS context has expired.
1527 * We cannot recover this stateid now, so
1528 * skip it and allow recovery thread to
1529 * proceed.
1530 */
965b5d67
TM		 1531 case -ENOMEM:
1532 err = 0;
1533 goto out;
1da177e4
LT		 1534 }
1535 err = nfs4_handle_exception(server, err, &exception);
1536 } while (exception.retry);
965b5d67 1537out:
1da177e4
LT		 1538 return err;
1539}
1540
cdd4e68b
TM		 1541static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1542{
1543 struct nfs4_opendata *data = calldata;
1544
1545 data->rpc_status = task->tk_status;
26e976a8 1546 if (data->rpc_status == 0) {
f597c537 1547 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1548 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1549 renew_lease(data->o_res.server, data->timestamp);
3e309914 1550 data->rpc_done = 1;
26e976a8 1551 }
cdd4e68b
TM		 1552}
1553
1554static void nfs4_open_confirm_release(void *calldata)
1555{
1556 struct nfs4_opendata *data = calldata;
1557 struct nfs4_state *state = NULL;
1558
1559 /* If this request hasn't been cancelled, do nothing */
1560 if (data->cancelled == 0)
1561 goto out_free;
1562 /* In case of error, no cleanup! */
3e309914 1563 if (!data->rpc_done)
cdd4e68b 1564 goto out_free;
cdd4e68b 1565 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1566 if (!IS_ERR(state))
643168c2 1567 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1568out_free:
c6d00e63 1569 nfs4_opendata_put(data);
cdd4e68b
TM		 1570}
1571
1572static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1573 .rpc_call_done = nfs4_open_confirm_done,
1574 .rpc_release = nfs4_open_confirm_release,
1575};
1576
1577/*
1578 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1579 */
1580static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1581{
1582 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1583 struct rpc_task *task;
5138fde0
TM		 1584 struct rpc_message msg = {
1585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1586 .rpc_argp = &data->c_arg,
1587 .rpc_resp = &data->c_res,
1588 .rpc_cred = data->owner->so_cred,
1589 };
c970aa85
TM		 1590 struct rpc_task_setup task_setup_data = {
1591 .rpc_client = server->client,
5138fde0 1592 .rpc_message = &msg,
c970aa85
TM		 1593 .callback_ops = &nfs4_open_confirm_ops,
1594 .callback_data = data,
101070ca 1595 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1596 .flags = RPC_TASK_ASYNC,
1597 };
1da177e4
LT		 1598 int status;
1599
c6d00e63 1600 kref_get(&data->kref);
3e309914
TM		 1601 data->rpc_done = 0;
1602 data->rpc_status = 0;
5138fde0 1603 data->timestamp = jiffies;
c970aa85 1604 task = rpc_run_task(&task_setup_data);
7a1218a2 1605 if (IS_ERR(task))
cdd4e68b 1606 return PTR_ERR(task);
cdd4e68b
TM		 1607 status = nfs4_wait_for_completion_rpc_task(task);
1608 if (status != 0) {
1609 data->cancelled = 1;
1610 smp_wmb();
1611 } else
1612 status = data->rpc_status;
e6b3c4db 1613 rpc_put_task(task);
1da177e4
LT		 1614 return status;
1615}
1616
24ac23ab 1617static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1618{
24ac23ab
TM		 1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state_owner *sp = data->owner;
5138fde0 1621
24ac23ab
TM		 1622 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1623 return;
aac00a8d
TM		 1624 /*
1625 * Check if we still need to send an OPEN call, or if we can use
1626 * a delegation instead.
1627 */
1628 if (data->state != NULL) {
1629 struct nfs_delegation *delegation;
1630
dc0b027d 1631 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1632 goto out_no_action;
aac00a8d
TM		 1633 rcu_read_lock();
1634 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1635 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1636 can_open_delegated(delegation, data->o_arg.fmode))
1637 goto unlock_no_action;
aac00a8d
TM		 1638 rcu_read_unlock();
1639 }
95b72eb0 1640 /* Update client id. */
1f0e890d 1641 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1642 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1643 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1644 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1645 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1646 }
26e976a8 1647 data->timestamp = jiffies;
035168ab 1648 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1649 &data->o_arg.seq_args,
2240a9e2
TM		 1650 &data->o_res.seq_res,
1651 task) != 0)
1652 nfs_release_seqid(data->o_arg.seqid);
1653 else
1654 rpc_call_start(task);
6ee41268 1655 return;
652f89f6
TM		 1656unlock_no_action:
1657 rcu_read_unlock();
6ee41268
TM		 1658out_no_action:
1659 task->tk_action = NULL;
1660
24ac23ab 1661}
1da177e4 1662
b257957e
AB		 1663static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1664{
1665 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1666 nfs4_open_prepare(task, calldata);
1667}
1668
24ac23ab
TM		 1669static void nfs4_open_done(struct rpc_task *task, void *calldata)
1670{
1671 struct nfs4_opendata *data = calldata;
1da177e4 1672
24ac23ab 1673 data->rpc_status = task->tk_status;
d898528c 1674
14516c3a
TM		 1675 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1676 return;
d898528c 1677
24ac23ab 1678 if (task->tk_status == 0) {
807d66d8
TM		 1679 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1680 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1681 case S_IFREG:
1682 break;
1683 case S_IFLNK:
24ac23ab 1684 data->rpc_status = -ELOOP;
6f926b5b
TM		 1685 break;
1686 case S_IFDIR:
24ac23ab 1687 data->rpc_status = -EISDIR;
6f926b5b
TM		 1688 break;
1689 default:
24ac23ab 1690 data->rpc_status = -ENOTDIR;
807d66d8 1691 }
6f926b5b 1692 }
26e976a8 1693 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1694 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1696 }
3e309914 1697 data->rpc_done = 1;
24ac23ab 1698}
6f926b5b 1699
24ac23ab
TM		 1700static void nfs4_open_release(void *calldata)
1701{
1702 struct nfs4_opendata *data = calldata;
1703 struct nfs4_state *state = NULL;
1704
1705 /* If this request hasn't been cancelled, do nothing */
1706 if (data->cancelled == 0)
1707 goto out_free;
1708 /* In case of error, no cleanup! */
3e309914 1709 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1710 goto out_free;
1711 /* In case we need an open_confirm, no cleanup! */
1712 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1713 goto out_free;
24ac23ab 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
24ac23ab
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_ops = {
1722 .rpc_call_prepare = nfs4_open_prepare,
1723 .rpc_call_done = nfs4_open_done,
1724 .rpc_release = nfs4_open_release,
1725};
1726
b257957e
AB		 1727static const struct rpc_call_ops nfs4_recover_open_ops = {
1728 .rpc_call_prepare = nfs4_recover_open_prepare,
1729 .rpc_call_done = nfs4_open_done,
1730 .rpc_release = nfs4_open_release,
1731};
1732
1733static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1734{
1735 struct inode *dir = data->dir->d_inode;
1736 struct nfs_server *server = NFS_SERVER(dir);
1737 struct nfs_openargs *o_arg = &data->o_arg;
1738 struct nfs_openres *o_res = &data->o_res;
1739 struct rpc_task *task;
5138fde0
TM		 1740 struct rpc_message msg = {
1741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1742 .rpc_argp = o_arg,
1743 .rpc_resp = o_res,
1744 .rpc_cred = data->owner->so_cred,
1745 };
c970aa85
TM		 1746 struct rpc_task_setup task_setup_data = {
1747 .rpc_client = server->client,
5138fde0 1748 .rpc_message = &msg,
c970aa85
TM		 1749 .callback_ops = &nfs4_open_ops,
1750 .callback_data = data,
101070ca 1751 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1752 .flags = RPC_TASK_ASYNC,
1753 };
24ac23ab
TM		 1754 int status;
1755
9d12b216 1756 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1757 kref_get(&data->kref);
3e309914
TM		 1758 data->rpc_done = 0;
1759 data->rpc_status = 0;
2ced46c2 1760 data->cancelled = 0;
b257957e
AB		 1761 if (isrecover)
1762 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1763 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1764 if (IS_ERR(task))
1765 return PTR_ERR(task);
1766 status = nfs4_wait_for_completion_rpc_task(task);
1767 if (status != 0) {
1768 data->cancelled = 1;
1769 smp_wmb();
1770 } else
1771 status = data->rpc_status;
1772 rpc_put_task(task);
1773
1774 return status;
1775}
1776
1777static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1778{
1779 struct inode *dir = data->dir->d_inode;
1780 struct nfs_openres *o_res = &data->o_res;
1781 int status;
1782
1783 status = nfs4_run_open_task(data, 1);
1784 if (status != 0 || !data->rpc_done)
1785 return status;
1786
6926afd1
TM		 1787 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1788
b257957e
AB		 1789 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1790 status = _nfs4_proc_open_confirm(data);
1791 if (status != 0)
1792 return status;
1793 }
1794
1795 return status;
1796}
1797
6168f62c
WAA		 1798static int nfs4_opendata_access(struct rpc_cred *cred,
1799 struct nfs4_opendata *opendata,
1800 struct nfs4_state *state, fmode_t fmode)
1801{
1802 struct nfs_access_entry cache;
1803 u32 mask;
1804
1805 /* access call failed or for some reason the server doesn't
1806 * support any access modes -- defer access call until later */
1807 if (opendata->o_res.access_supported == 0)
1808 return 0;
1809
1810 mask = 0;
bbd3a8ee
WAA		 1811 /* don't check MAY_WRITE - a newly created file may not have
1812 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1813 if (fmode & FMODE_READ)
1814 mask |= MAY_READ;
6168f62c
WAA		 1815 if (fmode & FMODE_EXEC)
1816 mask |= MAY_EXEC;
1817
1818 cache.cred = cred;
1819 cache.jiffies = jiffies;
1820 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1821 nfs_access_add_cache(state->inode, &cache);
1822
bbd3a8ee 1823 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1824 return 0;
1825
1826 /* even though OPEN succeeded, access is denied. Close the file */
1827 nfs4_close_state(state, fmode);
998f40b5 1828 return -EACCES;
6168f62c
WAA		 1829}
1830
b257957e
AB		 1831/*
1832 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1833 */
1834static int _nfs4_proc_open(struct nfs4_opendata *data)
1835{
1836 struct inode *dir = data->dir->d_inode;
1837 struct nfs_server *server = NFS_SERVER(dir);
1838 struct nfs_openargs *o_arg = &data->o_arg;
1839 struct nfs_openres *o_res = &data->o_res;
1840 int status;
1841
1842 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1843 if (!data->rpc_done)
1844 return status;
1845 if (status != 0) {
1846 if (status == -NFS4ERR_BADNAME &&
1847 !(o_arg->open_flags & O_CREAT))
1848 return -ENOENT;
24ac23ab 1849 return status;
08ef7bd3 1850 }
24ac23ab 1851
6926afd1
TM		 1852 nfs_fattr_map_and_free_names(server, &data->f_attr);
1853
90ff0c54 1854 if (o_arg->open_flags & O_CREAT)
56ae19f3 1855 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1856 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1857 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1858 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1859 status = _nfs4_proc_open_confirm(data);
1da177e4 1860 if (status != 0)
24ac23ab 1861 return status;
1da177e4
LT		 1862 }
1863 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1864 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1865 return 0;
1da177e4
LT		 1866}
1867
d83217c1
AA		 1868static int nfs4_recover_expired_lease(struct nfs_server *server)
1869{
1870 return nfs4_client_recover_expired_lease(server->nfs_client);
1871}
1872
1da177e4
LT		 1873/*
1874 * OPEN_EXPIRED:
1875 * reclaim state on the server after a network partition.
1876 * Assumes caller holds the appropriate lock
1877 */
539cd03a 1878static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1879{
e56e0b78 1880 struct nfs4_opendata *opendata;
864472e9 1881 int ret;
1da177e4 1882
6f220ed5
TM		 1883 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1884 if (IS_ERR(opendata))
1885 return PTR_ERR(opendata);
864472e9 1886 ret = nfs4_open_recover(opendata, state);
35d05778 1887 if (ret == -ESTALE)
3d4ff43d 1888 d_drop(ctx->dentry);
c6d00e63 1889 nfs4_opendata_put(opendata);
864472e9 1890 return ret;
1da177e4
LT		 1891}
1892
a9ed2e25 1893static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1894{
539cd03a 1895 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1896 struct nfs4_exception exception = { };
1897 int err;
1898
1899 do {
539cd03a 1900 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1901 switch (err) {
1902 default:
1903 goto out;
1904 case -NFS4ERR_GRACE:
1905 case -NFS4ERR_DELAY:
1906 nfs4_handle_exception(server, err, &exception);
1907 err = 0;
1908 }
202b50dc 1909 } while (exception.retry);
a9ed2e25 1910out:
202b50dc
TM		 1911 return err;
1912}
1913
1da177e4
LT		 1914static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1915{
1da177e4 1916 struct nfs_open_context *ctx;
864472e9 1917 int ret;
1da177e4 1918
864472e9
TM		 1919 ctx = nfs4_state_find_open_context(state);
1920 if (IS_ERR(ctx))
1921 return PTR_ERR(ctx);
539cd03a 1922 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1923 put_nfs_open_context(ctx);
1924 return ret;
1da177e4
LT		 1925}
1926
f062eb6c 1927#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1928static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1929{
f062eb6c 1930 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1931 nfs4_stateid *stateid = &state->stateid;
1932 int status;
1933
1934 /* If a state reset has been done, test_stateid is unneeded */
1935 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1936 return;
1937
1938 status = nfs41_test_stateid(server, stateid);
1939 if (status != NFS_OK) {
1940 /* Free the stateid unless the server explicitly
1941 * informs us the stateid is unrecognized. */
1942 if (status != -NFS4ERR_BAD_STATEID)
1943 nfs41_free_stateid(server, stateid);
6938867e 1944 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1945
6938867e
BS		 1946 write_seqlock(&state->seqlock);
1947 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1948 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1949 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1950 }
1951}
1952
1953/**
1954 * nfs41_check_open_stateid - possibly free an open stateid
1955 *
1956 * @state: NFSv4 state for an inode
1957 *
1958 * Returns NFS_OK if recovery for this stateid is now finished.
1959 * Otherwise a negative NFS4ERR value is returned.
1960 */
1961static int nfs41_check_open_stateid(struct nfs4_state *state)
1962{
1963 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1964 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1965 int status;
1966
1967 /* If a state reset has been done, test_stateid is unneeded */
1968 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1969 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1970 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1971 return -NFS4ERR_BAD_STATEID;
1972
1973 status = nfs41_test_stateid(server, stateid);
1974 if (status != NFS_OK) {
1975 /* Free the stateid unless the server explicitly
1976 * informs us the stateid is unrecognized. */
1977 if (status != -NFS4ERR_BAD_STATEID)
1978 nfs41_free_stateid(server, stateid);
1979
1980 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1981 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1982 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1983 }
1984 return status;
1985}
1986
1987static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1988{
eb64cf96 1989 int status;
b01dd1d8 1990
3e60ffdd
CL		 1991 nfs41_clear_delegation_stateid(state);
1992 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1993 if (status != NFS_OK)
1994 status = nfs4_open_expired(sp, state);
1995 return status;
f062eb6c
BS		 1996}
1997#endif
1998
aa53ed54
JL		 1999/*
2000 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2001 * fields corresponding to attributes that were used to store the verifier.
2002 * Make sure we clobber those fields in the later setattr call
2003 */
2004static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2005{
2006 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2007 !(sattr->ia_valid & ATTR_ATIME_SET))
2008 sattr->ia_valid |= ATTR_ATIME;
2009
2010 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2011 !(sattr->ia_valid & ATTR_MTIME_SET))
2012 sattr->ia_valid |= ATTR_MTIME;
2013}
2014
1da177e4 2015/*
24ac23ab 2016 * Returns a referenced nfs4_state
1da177e4 2017 */
82be417a
AA		 2018static int _nfs4_do_open(struct inode *dir,
2019 struct dentry *dentry,
2020 fmode_t fmode,
2021 int flags,
2022 struct iattr *sattr,
2023 struct rpc_cred *cred,
2024 struct nfs4_state **res,
2025 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2026{
2027 struct nfs4_state_owner *sp;
2028 struct nfs4_state *state = NULL;
2029 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2030 struct nfs4_opendata *opendata;
aac00a8d 2031 int status;
1da177e4
LT		 2032
2033 /* Protect against reboot recovery conflicts */
1da177e4 2034 status = -ENOMEM;
d1e284d5
TM		 2035 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2036 if (sp == NULL) {
1da177e4
LT		 2037 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2038 goto out_err;
2039 }
58d9714a
TM		 2040 status = nfs4_recover_expired_lease(server);
2041 if (status != 0)
b4454fe1 2042 goto err_put_state_owner;
82a2c1b7
AV		 2043 if (dentry->d_inode != NULL)
2044 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2045 status = -ENOMEM;
82a2c1b7 2046 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 2047 if (opendata == NULL)
95d35cb4 2048 goto err_put_state_owner;
1da177e4 2049
82be417a
AA		 2050 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2051 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2052 if (!opendata->f_attr.mdsthreshold)
2053 goto err_opendata_put;
1549210f 2054 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2055 }
82a2c1b7
AV		 2056 if (dentry->d_inode != NULL)
2057 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2058
24ac23ab 2059 status = _nfs4_proc_open(opendata);
1da177e4 2060 if (status != 0)
c6d00e63 2061 goto err_opendata_put;
1da177e4 2062
24ac23ab 2063 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2064 status = PTR_ERR(state);
2065 if (IS_ERR(state))
c6d00e63 2066 goto err_opendata_put;
0df5dd4a 2067 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 2068 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 2069
6168f62c
WAA		 2070 status = nfs4_opendata_access(cred, opendata, state, fmode);
2071 if (status != 0)
2072 goto err_opendata_put;
2073
0ab64e0e
TM		 2074 if (opendata->o_arg.open_flags & O_EXCL) {
2075 nfs4_exclusive_attrset(opendata, sattr);
2076
2077 nfs_fattr_init(opendata->o_res.f_attr);
2078 status = nfs4_do_setattr(state->inode, cred,
2079 opendata->o_res.f_attr, sattr,
2080 state);
2081 if (status == 0)
2082 nfs_setattr_update_inode(state->inode, sattr);
2083 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2084 }
82be417a
AA		 2085
2086 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2087 *ctx_th = opendata->f_attr.mdsthreshold;
2088 else
2089 kfree(opendata->f_attr.mdsthreshold);
2090 opendata->f_attr.mdsthreshold = NULL;
2091
c6d00e63 2092 nfs4_opendata_put(opendata);
1da177e4 2093 nfs4_put_state_owner(sp);
1da177e4
LT		 2094 *res = state;
2095 return 0;
c6d00e63 2096err_opendata_put:
82be417a 2097 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2098 nfs4_opendata_put(opendata);
e56e0b78
TM		 2099err_put_state_owner:
2100 nfs4_put_state_owner(sp);
1da177e4 2101out_err:
1da177e4
LT		 2102 *res = NULL;
2103 return status;
2104}
2105
2106
82be417a
AA		 2107static struct nfs4_state *nfs4_do_open(struct inode *dir,
2108 struct dentry *dentry,
2109 fmode_t fmode,
2110 int flags,
2111 struct iattr *sattr,
2112 struct rpc_cred *cred,
2113 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2114{
2115 struct nfs4_exception exception = { };
2116 struct nfs4_state *res;
2117 int status;
2118
6168f62c 2119 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2120 do {
82be417a
AA		 2121 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2122 &res, ctx_th);
1da177e4
LT		 2123 if (status == 0)
2124 break;
2125 /* NOTE: BAD_SEQID means the server and client disagree about the
2126 * book-keeping w.r.t. state-changing operations
2127 * (OPEN/CLOSE/LOCK/LOCKU...)
2128 * It is actually a sign of a bug on the client or on the server.
2129 *
2130 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2131 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2132 * have unhashed the old state_owner for us, and that we can
2133 * therefore safely retry using a new one. We should still warn
2134 * the user though...
2135 */
2136 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2137 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2138 " returned a bad sequence-id error!\n",
2139 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2140 exception.retry = 1;
2141 continue;
2142 }
550f5747
TM		 2143 /*
2144 * BAD_STATEID on OPEN means that the server cancelled our
2145 * state before it received the OPEN_CONFIRM.
2146 * Recover by retrying the request as per the discussion
2147 * on Page 181 of RFC3530.
2148 */
2149 if (status == -NFS4ERR_BAD_STATEID) {
2150 exception.retry = 1;
2151 continue;
2152 }
aac00a8d
TM		 2153 if (status == -EAGAIN) {
2154 /* We must have found a delegation */
2155 exception.retry = 1;
2156 continue;
2157 }
1da177e4
LT		 2158 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2159 status, &exception));
2160 } while (exception.retry);
2161 return res;
2162}
2163
659bfcd6
TM		 2164static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2165 struct nfs_fattr *fattr, struct iattr *sattr,
2166 struct nfs4_state *state)
1da177e4 2167{
3e4f6290 2168 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2169 struct nfs_setattrargs arg = {
3e4f6290 2170 .fh = NFS_FH(inode),
1da177e4
LT		 2171 .iap = sattr,
2172 .server = server,
2173 .bitmask = server->attr_bitmask,
2174 };
2175 struct nfs_setattrres res = {
2176 .fattr = fattr,
2177 .server = server,
2178 };
2179 struct rpc_message msg = {
659bfcd6
TM		 2180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2181 .rpc_argp = &arg,
2182 .rpc_resp = &res,
2183 .rpc_cred = cred,
1da177e4 2184 };
26e976a8 2185 unsigned long timestamp = jiffies;
65e4308d 2186 int status;
1da177e4 2187
0e574af1 2188 nfs_fattr_init(fattr);
1da177e4 2189
4fc8796d 2190 if (state != NULL) {
2a369153
TM		 2191 struct nfs_lockowner lockowner = {
2192 .l_owner = current->files,
2193 .l_pid = current->tgid,
2194 };
4fc8796d 2195 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2196 &lockowner);
4fc8796d
TM		 2197 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2198 FMODE_WRITE)) {
3e4f6290 2199 /* Use that stateid */
08e9eac4 2200 } else
f597c537 2201 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2202
7c513058 2203 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2204 if (status == 0 && state != NULL)
2205 renew_lease(server, timestamp);
65e4308d 2206 return status;
1da177e4
LT		 2207}
2208
659bfcd6
TM		 2209static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2210 struct nfs_fattr *fattr, struct iattr *sattr,
2211 struct nfs4_state *state)
1da177e4 2212{
3e4f6290 2213 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2214 struct nfs4_exception exception = {
2215 .state = state,
3114ea7a 2216 .inode = inode,
a1d0b5ee 2217 };
1da177e4
LT		 2218 int err;
2219 do {
451146be
TM		 2220 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2221 switch (err) {
2222 case -NFS4ERR_OPENMODE:
2223 if (state && !(state->state & FMODE_WRITE)) {
2224 err = -EBADF;
2225 if (sattr->ia_valid & ATTR_OPEN)
2226 err = -EACCES;
2227 goto out;
2228 }
2229 }
2230 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2231 } while (exception.retry);
451146be 2232out:
1da177e4
LT		 2233 return err;
2234}
2235
2236struct nfs4_closedata {
2237 struct inode *inode;
2238 struct nfs4_state *state;
2239 struct nfs_closeargs arg;
2240 struct nfs_closeres res;
516a6af6 2241 struct nfs_fattr fattr;
26e976a8 2242 unsigned long timestamp;
f7e8917a
FI		 2243 bool roc;
2244 u32 roc_barrier;
1da177e4
LT		 2245};
2246
963d8fe5 2247static void nfs4_free_closedata(void *data)
9512135d 2248{
963d8fe5
TM		 2249 struct nfs4_closedata *calldata = data;
2250 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2251 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2252
f7e8917a
FI		 2253 if (calldata->roc)
2254 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2255 nfs4_put_open_state(calldata->state);
2256 nfs_free_seqid(calldata->arg.seqid);
9512135d 2257 nfs4_put_state_owner(sp);
324d003b 2258 nfs_sb_deactive_async(sb);
9512135d
TM		 2259 kfree(calldata);
2260}
2261
88069f77
TM		 2262static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2263 fmode_t fmode)
2264{
2265 spin_lock(&state->owner->so_lock);
2266 if (!(fmode & FMODE_READ))
2267 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2268 if (!(fmode & FMODE_WRITE))
2269 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2270 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2271 spin_unlock(&state->owner->so_lock);
2272}
2273
963d8fe5 2274static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2275{
963d8fe5 2276 struct nfs4_closedata *calldata = data;
1da177e4 2277 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2278 struct nfs_server *server = NFS_SERVER(calldata->inode);
2279
a3ca5651 2280 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2281 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2282 return;
1da177e4
LT		 2283 /* hmm. we are done with the inode, and in the process of freeing
2284 * the state_owner. we keep this around to process errors
2285 */
1da177e4
LT		 2286 switch (task->tk_status) {
2287 case 0:
f7e8917a
FI		 2288 if (calldata->roc)
2289 pnfs_roc_set_barrier(state->inode,
2290 calldata->roc_barrier);
45328c35 2291 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2292 renew_lease(server, calldata->timestamp);
88069f77
TM		 2293 nfs4_close_clear_stateid_flags(state,
2294 calldata->arg.fmode);
1da177e4
LT		 2295 break;
2296 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2297 case -NFS4ERR_OLD_STATEID:
2298 case -NFS4ERR_BAD_STATEID:
1da177e4 2299 case -NFS4ERR_EXPIRED:
dc0b027d 2300 if (calldata->arg.fmode == 0)
9e33bed5 2301 break;
1da177e4 2302 default:
72211dbe
TM		 2303 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2304 rpc_restart_call_prepare(task);
1da177e4 2305 }
72211dbe 2306 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2307 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2308 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2309}
2310
4ce70ada 2311static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2312{
4ce70ada 2313 struct nfs4_closedata *calldata = data;
9512135d 2314 struct nfs4_state *state = calldata->state;
7fdab069 2315 struct inode *inode = calldata->inode;
88069f77 2316 int call_close = 0;
9512135d 2317
a3ca5651 2318 dprintk("%s: begin!\n", __func__);
963d8fe5 2319 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2320 return;
003707c7 2321
88069f77
TM		 2322 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2323 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2324 spin_lock(&state->owner->so_lock);
003707c7 2325 /* Calculate the change in open mode */
e7616923 2326 if (state->n_rdwr == 0) {
003707c7 2327 if (state->n_rdonly == 0) {
88069f77
TM		 2328 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2329 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2330 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2331 }
2332 if (state->n_wronly == 0) {
88069f77
TM		 2333 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2334 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2335 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2336 }
e7616923 2337 }
4cecb76f 2338 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2339
2340 if (!call_close) {
963d8fe5
TM		 2341 /* Note: exit _without_ calling nfs4_close_done */
2342 task->tk_action = NULL;
a3ca5651 2343 goto out;
9512135d 2344 }
88069f77 2345
f7e8917a 2346 if (calldata->arg.fmode == 0) {
88069f77 2347 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2348 if (calldata->roc &&
7fdab069 2349 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2350 goto out;
f7e8917a 2351 }
88069f77 2352
516a6af6 2353 nfs_fattr_init(calldata->res.fattr);
26e976a8 2354 calldata->timestamp = jiffies;
7fdab069 2355 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2356 &calldata->arg.seq_args,
2357 &calldata->res.seq_res,
2240a9e2
TM		 2358 task) != 0)
2359 nfs_release_seqid(calldata->arg.seqid);
2360 else
2361 rpc_call_start(task);
a3ca5651
CL		 2362out:
2363 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2364}
2365
963d8fe5 2366static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2367 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2368 .rpc_call_done = nfs4_close_done,
2369 .rpc_release = nfs4_free_closedata,
2370};
2371
1da177e4
LT		 2372/*
2373 * It is possible for data to be read/written from a mem-mapped file
2374 * after the sys_close call (which hits the vfs layer as a flush).
2375 * This means that we can't safely call nfsv4 close on a file until
2376 * the inode is cleared. This in turn means that we are not good
2377 * NFSv4 citizens - we do not indicate to the server to update the file's
2378 * share state even when we are done with one of the three share
2379 * stateid's in the inode.
2380 *
2381 * NOTE: Caller must be holding the sp->so_owner semaphore!
2382 */
1f7977c1 2383int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2384{
4a35bd41 2385 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2386 struct nfs4_closedata *calldata;
b39e625b
TM		 2387 struct nfs4_state_owner *sp = state->owner;
2388 struct rpc_task *task;
5138fde0
TM		 2389 struct rpc_message msg = {
2390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2391 .rpc_cred = state->owner->so_cred,
2392 };
c970aa85
TM		 2393 struct rpc_task_setup task_setup_data = {
2394 .rpc_client = server->client,
5138fde0 2395 .rpc_message = &msg,
c970aa85 2396 .callback_ops = &nfs4_close_ops,
101070ca 2397 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2398 .flags = RPC_TASK_ASYNC,
2399 };
9512135d 2400 int status = -ENOMEM;
1da177e4 2401
8535b2be 2402 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2403 if (calldata == NULL)
9512135d 2404 goto out;
9d12b216 2405 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2406 calldata->inode = state->inode;
1da177e4 2407 calldata->state = state;
4a35bd41 2408 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2409 calldata->arg.stateid = &state->open_stateid;
1da177e4 2410 /* Serialization for the sequence id */
8535b2be 2411 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2412 if (calldata->arg.seqid == NULL)
2413 goto out_free_calldata;
dc0b027d 2414 calldata->arg.fmode = 0;
a65318bf 2415 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2416 calldata->res.fattr = &calldata->fattr;
c1d51931 2417 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2418 calldata->res.server = server;
1f7977c1 2419 calldata->roc = pnfs_roc(state->inode);
643168c2 2420 nfs_sb_active(calldata->inode->i_sb);
9512135d 2421
1174dd1f
TM		 2422 msg.rpc_argp = &calldata->arg;
2423 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2424 task_setup_data.callback_data = calldata;
2425 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2426 if (IS_ERR(task))
2427 return PTR_ERR(task);
a49c3c77
TM		 2428 status = 0;
2429 if (wait)
2430 status = rpc_wait_for_completion_task(task);
b39e625b 2431 rpc_put_task(task);
a49c3c77 2432 return status;
9512135d
TM		 2433out_free_calldata:
2434 kfree(calldata);
2435out:
b39e625b
TM		 2436 nfs4_put_open_state(state);
2437 nfs4_put_state_owner(sp);
9512135d 2438 return status;
1da177e4
LT		 2439}
2440
2b484297 2441static struct inode *
cd9a1c0e 2442nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2443{
1da177e4 2444 struct nfs4_state *state;
1da177e4 2445
565277f6 2446 /* Protect against concurrent sillydeletes */
82be417a
AA		 2447 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2448 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2449 if (IS_ERR(state))
2450 return ERR_CAST(state);
cd9a1c0e 2451 ctx->state = state;
f46e0bd3 2452 return igrab(state->inode);
1da177e4
LT		 2453}
2454
1185a552 2455static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2456{
2457 if (ctx->state == NULL)
2458 return;
2459 if (is_sync)
643168c2 2460 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2461 else
643168c2 2462 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2463}
1da177e4
LT		 2464
2465static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2466{
43652ad5
BH		 2467 struct nfs4_server_caps_arg args = {
2468 .fhandle = fhandle,
2469 };
1da177e4
LT		 2470 struct nfs4_server_caps_res res = {};
2471 struct rpc_message msg = {
2472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2473 .rpc_argp = &args,
1da177e4
LT		 2474 .rpc_resp = &res,
2475 };
2476 int status;
2477
7c513058 2478 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2479 if (status == 0) {
2480 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2481 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2482 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2483 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2484 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2485 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2486 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2487 server->caps |= NFS_CAP_ACLS;
2488 if (res.has_links != 0)
2489 server->caps |= NFS_CAP_HARDLINKS;
2490 if (res.has_symlinks != 0)
2491 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2492 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2493 server->caps |= NFS_CAP_FILEID;
2494 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2495 server->caps |= NFS_CAP_MODE;
2496 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2497 server->caps |= NFS_CAP_NLINK;
2498 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2499 server->caps |= NFS_CAP_OWNER;
2500 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2501 server->caps |= NFS_CAP_OWNER_GROUP;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2503 server->caps |= NFS_CAP_ATIME;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2505 server->caps |= NFS_CAP_CTIME;
2506 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2507 server->caps |= NFS_CAP_MTIME;
2508
a65318bf
TM		 2509 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2510 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2511 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2512 server->acl_bitmask = res.acl_bitmask;
264e6351 2513 server->fh_expire_type = res.fh_expire_type;
1da177e4 2514 }
cccef3b9 2515
1da177e4
LT		 2516 return status;
2517}
2518
55a97593 2519int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2520{
2521 struct nfs4_exception exception = { };
2522 int err;
2523 do {
2524 err = nfs4_handle_exception(server,
2525 _nfs4_server_capabilities(server, fhandle),
2526 &exception);
2527 } while (exception.retry);
2528 return err;
2529}
2530
2531static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2532 struct nfs_fsinfo *info)
2533{
1da177e4
LT		 2534 struct nfs4_lookup_root_arg args = {
2535 .bitmask = nfs4_fattr_bitmap,
2536 };
2537 struct nfs4_lookup_res res = {
2538 .server = server,
0e574af1 2539 .fattr = info->fattr,
1da177e4
LT		 2540 .fh = fhandle,
2541 };
2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2544 .rpc_argp = &args,
2545 .rpc_resp = &res,
2546 };
008f55d0 2547
0e574af1 2548 nfs_fattr_init(info->fattr);
7c513058 2549 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2550}
2551
2552static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2553 struct nfs_fsinfo *info)
2554{
2555 struct nfs4_exception exception = { };
2556 int err;
2557 do {
fb8a5ba8
BS		 2558 err = _nfs4_lookup_root(server, fhandle, info);
2559 switch (err) {
2560 case 0:
2561 case -NFS4ERR_WRONGSEC:
05e9cfb4 2562 goto out;
fb8a5ba8
BS		 2563 default:
2564 err = nfs4_handle_exception(server, err, &exception);
2565 }
1da177e4 2566 } while (exception.retry);
05e9cfb4 2567out:
1da177e4
LT		 2568 return err;
2569}
2570
8f70e95f
BS		 2571static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2572 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2573{
2574 struct rpc_auth *auth;
2575 int ret;
2576
2577 auth = rpcauth_create(flavor, server->client);
e8d920c5 2578 if (IS_ERR(auth)) {
8f70e95f
BS		 2579 ret = -EIO;
2580 goto out;
2581 }
2582 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2583out:
2584 return ret;
2585}
2586
801a16dc 2587static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2588 struct nfs_fsinfo *info)
1da177e4 2589{
8f70e95f 2590 int i, len, status = 0;
0fabee24 2591 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2592
6a1a1e34 2593 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2594 if (len < 0)
2595 return len;
8f70e95f
BS		 2596
2597 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2598 /* AUTH_UNIX is the default flavor if none was specified,
2599 * thus has already been tried. */
2600 if (flav_array[i] == RPC_AUTH_UNIX)
2601 continue;
2602
8f70e95f 2603 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2604 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2605 continue;
2606 break;
8f70e95f 2607 }
fb8a5ba8
BS		 2608 /*
2609 * -EACCESS could mean that the user doesn't have correct permissions
2610 * to access the mount. It could also mean that we tried to mount
2611 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2612 * existing mount programs don't handle -EACCES very well so it should
2613 * be mapped to -EPERM instead.
2614 */
2615 if (status == -EACCES)
2616 status = -EPERM;
801a16dc
BS		 2617 return status;
2618}
2619
2620/*
2621 * get the file handle for the "/" directory on the server
2622 */
3028eb2b
BS		 2623int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2624 struct nfs_fsinfo *info)
801a16dc 2625{
fca78d6d 2626 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2627 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2628 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2629 /*
2630 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2631 * by nfs4_map_errors() as this function exits.
2632 */
fca78d6d 2633 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2634 if (status == 0)
2635 status = nfs4_server_capabilities(server, fhandle);
2636 if (status == 0)
2637 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2638 return nfs4_map_errors(status);
1da177e4
LT		 2639}
2640
bae36241
BS		 2641static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2642 struct nfs_fsinfo *info)
2643{
2644 int error;
2645 struct nfs_fattr *fattr = info->fattr;
2646
2647 error = nfs4_server_capabilities(server, mntfh);
2648 if (error < 0) {
2649 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2650 return error;
2651 }
2652
2653 error = nfs4_proc_getattr(server, mntfh, fattr);
2654 if (error < 0) {
2655 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2656 return error;
2657 }
2658
2659 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2660 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2661 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2662
2663 return error;
2664}
2665
6b97fd3d
MN		 2666/*
2667 * Get locations and (maybe) other attributes of a referral.
2668 * Note that we'll actually follow the referral later when
2669 * we detect fsid mismatch in inode revalidation
2670 */
f05d147f
BS		 2671static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2672 const struct qstr *name, struct nfs_fattr *fattr,
2673 struct nfs_fh *fhandle)
6b97fd3d
MN		 2674{
2675 int status = -ENOMEM;
2676 struct page *page = NULL;
2677 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2678
2679 page = alloc_page(GFP_KERNEL);
2680 if (page == NULL)
2681 goto out;
2682 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2683 if (locations == NULL)
2684 goto out;
2685
f05d147f 2686 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2687 if (status != 0)
2688 goto out;
2689 /* Make sure server returned a different fsid for the referral */
2690 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2691 dprintk("%s: server did not return a different fsid for"
2692 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2693 status = -EIO;
2694 goto out;
2695 }
533eb461
AA		 2696 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2697 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2698
533eb461 2699 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2700 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2701 memset(fhandle, 0, sizeof(struct nfs_fh));
2702out:
2703 if (page)
2704 __free_page(page);
5d7ca35a 2705 kfree(locations);
6b97fd3d
MN		 2706 return status;
2707}
2708
1da177e4
LT		 2709static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2710{
2711 struct nfs4_getattr_arg args = {
2712 .fh = fhandle,
2713 .bitmask = server->attr_bitmask,
2714 };
2715 struct nfs4_getattr_res res = {
2716 .fattr = fattr,
2717 .server = server,
2718 };
2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2721 .rpc_argp = &args,
2722 .rpc_resp = &res,
2723 };
2724
0e574af1 2725 nfs_fattr_init(fattr);
7c513058 2726 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2727}
2728
2729static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2730{
2731 struct nfs4_exception exception = { };
2732 int err;
2733 do {
2734 err = nfs4_handle_exception(server,
2735 _nfs4_proc_getattr(server, fhandle, fattr),
2736 &exception);
2737 } while (exception.retry);
2738 return err;
2739}
2740
2741/*
2742 * The file is not closed if it is opened due to the a request to change
2743 * the size of the file. The open call will not be needed once the
2744 * VFS layer lookup-intents are implemented.
2745 *
2746 * Close is called when the inode is destroyed.
2747 * If we haven't opened the file for O_WRONLY, we
2748 * need to in the size_change case to obtain a stateid.
2749 *
2750 * Got race?
2751 * Because OPEN is always done by name in nfsv4, it is
2752 * possible that we opened a different file by the same
2753 * name. We can recognize this race condition, but we
2754 * can't do anything about it besides returning an error.
2755 *
2756 * This will be fixed with VFS changes (lookup-intent).
2757 */
2758static int
2759nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2760 struct iattr *sattr)
2761{
08e9eac4 2762 struct inode *inode = dentry->d_inode;
659bfcd6 2763 struct rpc_cred *cred = NULL;
d530838b 2764 struct nfs4_state *state = NULL;
1da177e4
LT		 2765 int status;
2766
8a1636c4
BH		 2767 if (pnfs_ld_layoutret_on_setattr(inode))
2768 pnfs_return_layout(inode);
2769
0e574af1 2770 nfs_fattr_init(fattr);
1da177e4 2771
2669940d
AA		 2772 /* Deal with open(O_TRUNC) */
2773 if (sattr->ia_valid & ATTR_OPEN)
2774 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2775
2776 /* Optimization: if the end result is no change, don't RPC */
2777 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2778 return 0;
2779
d530838b 2780 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2781 if (sattr->ia_valid & ATTR_FILE) {
2782 struct nfs_open_context *ctx;
2783
2784 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2785 if (ctx) {
2786 cred = ctx->cred;
2787 state = ctx->state;
2788 }
659bfcd6 2789 }
08e9eac4 2790
659bfcd6 2791 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2792 if (status == 0)
2793 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2794 return status;
2795}
2796
0c2e53f1
TM		 2797static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2798 const struct qstr *name, struct nfs_fh *fhandle,
2799 struct nfs_fattr *fattr)
2b3de441 2800{
0c2e53f1 2801 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2802 int status;
2803 struct nfs4_lookup_arg args = {
2804 .bitmask = server->attr_bitmask,
0c2e53f1 2805 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2806 .name = name,
2807 };
2808 struct nfs4_lookup_res res = {
2809 .server = server,
2810 .fattr = fattr,
2811 .fh = fhandle,
2812 };
2813 struct rpc_message msg = {
2814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2815 .rpc_argp = &args,
2816 .rpc_resp = &res,
2817 };
2818
2819 nfs_fattr_init(fattr);
2820
1da177e4 2821 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2822 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2823 dprintk("NFS reply lookup: %d\n", status);
2824 return status;
2825}
2826
72de53ec 2827static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2828{
7ebb9315 2829 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2830 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2831 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2832 fattr->nlink = 2;
2833}
2834
72de53ec
BS		 2835static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2836 struct qstr *name, struct nfs_fh *fhandle,
2837 struct nfs_fattr *fattr)
1da177e4
LT		 2838{
2839 struct nfs4_exception exception = { };
72de53ec 2840 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2841 int err;
2842 do {
72de53ec
BS		 2843 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2844 switch (err) {
08ef7bd3 2845 case -NFS4ERR_BADNAME:
72de53ec
BS		 2846 err = -ENOENT;
2847 goto out;
0c2e53f1 2848 case -NFS4ERR_MOVED:
f05d147f 2849 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2850 goto out;
0c2e53f1 2851 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2852 err = -EPERM;
2853 if (client != *clnt)
2854 goto out;
2855
2856 client = nfs4_create_sec_client(client, dir, name);
2857 if (IS_ERR(client))
2858 return PTR_ERR(client);
2859
2860 exception.retry = 1;
2861 break;
2862 default:
2863 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2864 }
1da177e4 2865 } while (exception.retry);
72de53ec
BS		 2866
2867out:
2868 if (err == 0)
2869 *clnt = client;
2870 else if (client != *clnt)
2871 rpc_shutdown_client(client);
2872
1da177e4
LT		 2873 return err;
2874}
2875
80a16b21 2876static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2877 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2878{
2879 int status;
2880 struct rpc_clnt *client = NFS_CLIENT(dir);
2881
2882 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2883 if (client != NFS_CLIENT(dir)) {
2884 rpc_shutdown_client(client);
2885 nfs_fixup_secinfo_attributes(fattr);
2886 }
2887 return status;
2888}
2889
f05d147f
BS		 2890struct rpc_clnt *
2891nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2892 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2893{
2894 int status;
2895 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2896
2897 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2898 if (status < 0) {
2899 rpc_shutdown_client(client);
2900 return ERR_PTR(status);
2901 }
2902 return client;
2903}
2904
1da177e4
LT		 2905static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2906{
76b32999 2907 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2908 struct nfs4_accessargs args = {
2909 .fh = NFS_FH(inode),
a4980e78 2910 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2911 };
2912 struct nfs4_accessres res = {
2913 .server = server,
1da177e4 2914 };
1da177e4
LT		 2915 struct rpc_message msg = {
2916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2917 .rpc_argp = &args,
2918 .rpc_resp = &res,
2919 .rpc_cred = entry->cred,
2920 };
2921 int mode = entry->mask;
2922 int status;
2923
2924 /*
2925 * Determine which access bits we want to ask for...
2926 */
2927 if (mode & MAY_READ)
2928 args.access |= NFS4_ACCESS_READ;
2929 if (S_ISDIR(inode->i_mode)) {
2930 if (mode & MAY_WRITE)
2931 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2932 if (mode & MAY_EXEC)
2933 args.access |= NFS4_ACCESS_LOOKUP;
2934 } else {
2935 if (mode & MAY_WRITE)
2936 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2937 if (mode & MAY_EXEC)
2938 args.access |= NFS4_ACCESS_EXECUTE;
2939 }
c407d41a
TM		 2940
2941 res.fattr = nfs_alloc_fattr();
2942 if (res.fattr == NULL)
2943 return -ENOMEM;
2944
7c513058 2945 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2946 if (!status) {
6168f62c 2947 nfs_access_set_mask(entry, res.access);
c407d41a 2948 nfs_refresh_inode(inode, res.fattr);
1da177e4 2949 }
c407d41a 2950 nfs_free_fattr(res.fattr);
1da177e4
LT		 2951 return status;
2952}
2953
2954static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2955{
2956 struct nfs4_exception exception = { };
2957 int err;
2958 do {
2959 err = nfs4_handle_exception(NFS_SERVER(inode),
2960 _nfs4_proc_access(inode, entry),
2961 &exception);
2962 } while (exception.retry);
2963 return err;
2964}
2965
2966/*
2967 * TODO: For the time being, we don't try to get any attributes
2968 * along with any of the zero-copy operations READ, READDIR,
2969 * READLINK, WRITE.
2970 *
2971 * In the case of the first three, we want to put the GETATTR
2972 * after the read-type operation -- this is because it is hard
2973 * to predict the length of a GETATTR response in v4, and thus
2974 * align the READ data correctly. This means that the GETATTR
2975 * may end up partially falling into the page cache, and we should
2976 * shift it into the 'tail' of the xdr_buf before processing.
2977 * To do this efficiently, we need to know the total length
2978 * of data received, which doesn't seem to be available outside
2979 * of the RPC layer.
2980 *
2981 * In the case of WRITE, we also want to put the GETATTR after
2982 * the operation -- in this case because we want to make sure
140150db 2983 * we get the post-operation mtime and size.
1da177e4
LT		 2984 *
2985 * Both of these changes to the XDR layer would in fact be quite
2986 * minor, but I decided to leave them for a subsequent patch.
2987 */
2988static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2989 unsigned int pgbase, unsigned int pglen)
2990{
2991 struct nfs4_readlink args = {
2992 .fh = NFS_FH(inode),
2993 .pgbase = pgbase,
2994 .pglen = pglen,
2995 .pages = &page,
2996 };
f50c7000 2997 struct nfs4_readlink_res res;
1da177e4
LT		 2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3000 .rpc_argp = &args,
f50c7000 3001 .rpc_resp = &res,
1da177e4
LT		 3002 };
3003
7c513058 3004 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3005}
3006
3007static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3008 unsigned int pgbase, unsigned int pglen)
3009{
3010 struct nfs4_exception exception = { };
3011 int err;
3012 do {
3013 err = nfs4_handle_exception(NFS_SERVER(inode),
3014 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3015 &exception);
3016 } while (exception.retry);
3017 return err;
3018}
3019
1da177e4 3020/*
8867fe58 3021 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3022 */
1da177e4
LT		 3023static int
3024nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3025 int flags)
1da177e4 3026{
8867fe58 3027 struct nfs_open_context *ctx;
1da177e4 3028 struct nfs4_state *state;
1da177e4
LT		 3029 int status = 0;
3030
8867fe58
MS		 3031 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3032 if (IS_ERR(ctx))
3033 return PTR_ERR(ctx);
3034
a8a5da99 3035 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3036 state = nfs4_do_open(dir, dentry, ctx->mode,
3037 flags, sattr, ctx->cred,
3038 &ctx->mdsthreshold);
d4d9cdcb 3039 d_drop(dentry);
1da177e4
LT		 3040 if (IS_ERR(state)) {
3041 status = PTR_ERR(state);
c0204fd2 3042 goto out;
1da177e4 3043 }
d4d9cdcb 3044 d_add(dentry, igrab(state->inode));
d75340cc 3045 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3046 ctx->state = state;
1da177e4 3047out:
8867fe58 3048 put_nfs_open_context(ctx);
1da177e4
LT		 3049 return status;
3050}
3051
3052static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3053{
16e42959 3054 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3055 struct nfs_removeargs args = {
1da177e4 3056 .fh = NFS_FH(dir),
26fe5750 3057 .name = *name,
16e42959 3058 };
4fdc17b2 3059 struct nfs_removeres res = {
16e42959 3060 .server = server,
1da177e4 3061 };
1da177e4 3062 struct rpc_message msg = {
4fdc17b2
TM		 3063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3064 .rpc_argp = &args,
3065 .rpc_resp = &res,
1da177e4 3066 };
778d2817 3067 int status;
1da177e4 3068
7c513058 3069 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3070 if (status == 0)
16e42959 3071 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3072 return status;
3073}
3074
3075static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3076{
3077 struct nfs4_exception exception = { };
3078 int err;
3079 do {
3080 err = nfs4_handle_exception(NFS_SERVER(dir),
3081 _nfs4_proc_remove(dir, name),
3082 &exception);
3083 } while (exception.retry);
3084 return err;
3085}
3086
e4eff1a6 3087static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3088{
e4eff1a6
TM		 3089 struct nfs_server *server = NFS_SERVER(dir);
3090 struct nfs_removeargs *args = msg->rpc_argp;
3091 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3092
e4eff1a6 3093 res->server = server;
1da177e4 3094 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3095 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3096}
3097
34e137cc
BS		 3098static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3099{
3100 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3101 &data->args.seq_args,
3102 &data->res.seq_res,
3103 task))
3104 return;
3105 rpc_call_start(task);
1da177e4
LT		 3106}
3107
e4eff1a6 3108static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3109{
e4eff1a6
TM		 3110 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3111
14516c3a
TM		 3112 if (!nfs4_sequence_done(task, &res->seq_res))
3113 return 0;
9e33bed5 3114 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3115 return 0;
3116 update_changeattr(dir, &res->cinfo);
e4eff1a6 3117 return 1;
1da177e4
LT		 3118}
3119
d3d4152a
JL		 3120static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3121{
3122 struct nfs_server *server = NFS_SERVER(dir);
3123 struct nfs_renameargs *arg = msg->rpc_argp;
3124 struct nfs_renameres *res = msg->rpc_resp;
3125
3126 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3127 res->server = server;
9d12b216 3128 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3129}
3130
c6bfa1a1
BS		 3131static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3132{
3133 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3134 &data->args.seq_args,
3135 &data->res.seq_res,
3136 task))
3137 return;
3138 rpc_call_start(task);
d3d4152a
JL		 3139}
3140
3141static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3142 struct inode *new_dir)
3143{
3144 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3145
3146 if (!nfs4_sequence_done(task, &res->seq_res))
3147 return 0;
3148 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3149 return 0;
3150
3151 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3152 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3153 return 1;
3154}
3155
1da177e4
LT		 3156static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3157 struct inode *new_dir, struct qstr *new_name)
3158{
6caf2c82 3159 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3160 struct nfs_renameargs arg = {
1da177e4
LT		 3161 .old_dir = NFS_FH(old_dir),
3162 .new_dir = NFS_FH(new_dir),
3163 .old_name = old_name,
3164 .new_name = new_name,
6caf2c82 3165 };
e8582a8b 3166 struct nfs_renameres res = {
6caf2c82 3167 .server = server,
1da177e4 3168 };
1da177e4
LT		 3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3171 .rpc_argp = &arg,
3172 .rpc_resp = &res,
3173 };
011fff72 3174 int status = -ENOMEM;
1da177e4 3175
7c513058 3176 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3177 if (!status) {
3178 update_changeattr(old_dir, &res.old_cinfo);
3179 update_changeattr(new_dir, &res.new_cinfo);
3180 }
3181 return status;
3182}
3183
3184static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3185 struct inode *new_dir, struct qstr *new_name)
3186{
3187 struct nfs4_exception exception = { };
3188 int err;
3189 do {
3190 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3191 _nfs4_proc_rename(old_dir, old_name,
3192 new_dir, new_name),
3193 &exception);
3194 } while (exception.retry);
3195 return err;
3196}
3197
3198static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3199{
91ba2eee 3200 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3201 struct nfs4_link_arg arg = {
3202 .fh = NFS_FH(inode),
3203 .dir_fh = NFS_FH(dir),
3204 .name = name,
91ba2eee
TM		 3205 .bitmask = server->attr_bitmask,
3206 };
91ba2eee
TM		 3207 struct nfs4_link_res res = {
3208 .server = server,
1da177e4 3209 };
1da177e4
LT		 3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3212 .rpc_argp = &arg,
91ba2eee 3213 .rpc_resp = &res,
1da177e4 3214 };
136f2627
TM		 3215 int status = -ENOMEM;
3216
3217 res.fattr = nfs_alloc_fattr();
778d2817 3218 if (res.fattr == NULL)
136f2627 3219 goto out;
1da177e4 3220
7c513058 3221 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3222 if (!status) {
3223 update_changeattr(dir, &res.cinfo);
73a3d07c 3224 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3225 }
136f2627 3226out:
136f2627 3227 nfs_free_fattr(res.fattr);
1da177e4
LT		 3228 return status;
3229}
3230
3231static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3232{
3233 struct nfs4_exception exception = { };
3234 int err;
3235 do {
3236 err = nfs4_handle_exception(NFS_SERVER(inode),
3237 _nfs4_proc_link(inode, dir, name),
3238 &exception);
3239 } while (exception.retry);
3240 return err;
3241}
3242
57dc9a57
TM		 3243struct nfs4_createdata {
3244 struct rpc_message msg;
3245 struct nfs4_create_arg arg;
3246 struct nfs4_create_res res;
3247 struct nfs_fh fh;
3248 struct nfs_fattr fattr;
57dc9a57
TM		 3249};
3250
3251static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3252 struct qstr *name, struct iattr *sattr, u32 ftype)
3253{
3254 struct nfs4_createdata *data;
3255
3256 data = kzalloc(sizeof(*data), GFP_KERNEL);
3257 if (data != NULL) {
3258 struct nfs_server *server = NFS_SERVER(dir);
3259
3260 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3261 data->msg.rpc_argp = &data->arg;
3262 data->msg.rpc_resp = &data->res;
3263 data->arg.dir_fh = NFS_FH(dir);
3264 data->arg.server = server;
3265 data->arg.name = name;
3266 data->arg.attrs = sattr;
3267 data->arg.ftype = ftype;
3268 data->arg.bitmask = server->attr_bitmask;
3269 data->res.server = server;
3270 data->res.fh = &data->fh;
3271 data->res.fattr = &data->fattr;
57dc9a57 3272 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3273 }
3274 return data;
3275}
3276
3277static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3278{
7c513058 3279 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3280 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3281 if (status == 0) {
3282 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3283 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3284 }
3285 return status;
3286}
3287
3288static void nfs4_free_createdata(struct nfs4_createdata *data)
3289{
3290 kfree(data);
3291}
3292
4f390c15 3293static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3294 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3295{
57dc9a57
TM		 3296 struct nfs4_createdata *data;
3297 int status = -ENAMETOOLONG;
1da177e4 3298
94a6d753 3299 if (len > NFS4_MAXPATHLEN)
57dc9a57 3300 goto out;
4f390c15 3301
57dc9a57
TM		 3302 status = -ENOMEM;
3303 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3304 if (data == NULL)
3305 goto out;
3306
3307 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3308 data->arg.u.symlink.pages = &page;
3309 data->arg.u.symlink.len = len;
1da177e4 3310
57dc9a57
TM		 3311 status = nfs4_do_create(dir, dentry, data);
3312
3313 nfs4_free_createdata(data);
3314out:
1da177e4
LT		 3315 return status;
3316}
3317
4f390c15 3318static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3319 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3320{
3321 struct nfs4_exception exception = { };
3322 int err;
3323 do {
3324 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3325 _nfs4_proc_symlink(dir, dentry, page,
3326 len, sattr),
1da177e4
LT		 3327 &exception);
3328 } while (exception.retry);
3329 return err;
3330}
3331
3332static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3333 struct iattr *sattr)
3334{
57dc9a57
TM		 3335 struct nfs4_createdata *data;
3336 int status = -ENOMEM;
1da177e4 3337
57dc9a57
TM		 3338 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3339 if (data == NULL)
3340 goto out;
3341
3342 status = nfs4_do_create(dir, dentry, data);
3343
3344 nfs4_free_createdata(data);
3345out:
1da177e4
LT		 3346 return status;
3347}
3348
3349static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3350 struct iattr *sattr)
3351{
3352 struct nfs4_exception exception = { };
3353 int err;
a8a5da99
AK		 3354
3355 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3356 do {
3357 err = nfs4_handle_exception(NFS_SERVER(dir),
3358 _nfs4_proc_mkdir(dir, dentry, sattr),
3359 &exception);
3360 } while (exception.retry);
3361 return err;
3362}
3363
3364static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3365 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3366{
3367 struct inode *dir = dentry->d_inode;
3368 struct nfs4_readdir_arg args = {
3369 .fh = NFS_FH(dir),
56e4ebf8 3370 .pages = pages,
1da177e4
LT		 3371 .pgbase = 0,
3372 .count = count,
96d25e53 3373 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3374 .plus = plus,
1da177e4
LT		 3375 };
3376 struct nfs4_readdir_res res;
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3379 .rpc_argp = &args,
3380 .rpc_resp = &res,
3381 .rpc_cred = cred,
3382 };
3383 int status;
3384
3110ff80 3385 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3386 dentry->d_parent->d_name.name,
3387 dentry->d_name.name,
3388 (unsigned long long)cookie);
c3f52af3 3389 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3390 res.pgbase = args.pgbase;
7c513058 3391 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3392 if (status >= 0) {
c3f52af3 3393 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3394 status += args.pgbase;
3395 }
c4812998
TM		 3396
3397 nfs_invalidate_atime(dir);
3398
3110ff80 3399 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3400 return status;
3401}
3402
3403static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3404 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3405{
3406 struct nfs4_exception exception = { };
3407 int err;
3408 do {
3409 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3410 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3411 pages, count, plus),
1da177e4
LT		 3412 &exception);
3413 } while (exception.retry);
3414 return err;
3415}
3416
3417static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3418 struct iattr *sattr, dev_t rdev)
3419{
57dc9a57
TM		 3420 struct nfs4_createdata *data;
3421 int mode = sattr->ia_mode;
3422 int status = -ENOMEM;
1da177e4 3423
57dc9a57
TM		 3424 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3425 if (data == NULL)
3426 goto out;
3427
1da177e4 3428 if (S_ISFIFO(mode))
57dc9a57 3429 data->arg.ftype = NF4FIFO;
1da177e4 3430 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3431 data->arg.ftype = NF4BLK;
3432 data->arg.u.device.specdata1 = MAJOR(rdev);
3433 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3434 }
3435 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3436 data->arg.ftype = NF4CHR;
3437 data->arg.u.device.specdata1 = MAJOR(rdev);
3438 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3439 } else if (!S_ISSOCK(mode)) {
3440 status = -EINVAL;
3441 goto out_free;
1da177e4 3442 }
1da177e4 3443
57dc9a57 3444 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3445out_free:
57dc9a57
TM		 3446 nfs4_free_createdata(data);
3447out:
1da177e4
LT		 3448 return status;
3449}
3450
3451static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3452 struct iattr *sattr, dev_t rdev)
3453{
3454 struct nfs4_exception exception = { };
3455 int err;
a8a5da99
AK		 3456
3457 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3458 do {
3459 err = nfs4_handle_exception(NFS_SERVER(dir),
3460 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3461 &exception);
3462 } while (exception.retry);
3463 return err;
3464}
3465
3466static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3467 struct nfs_fsstat *fsstat)
3468{
3469 struct nfs4_statfs_arg args = {
3470 .fh = fhandle,
3471 .bitmask = server->attr_bitmask,
3472 };
24ad148a
BH		 3473 struct nfs4_statfs_res res = {
3474 .fsstat = fsstat,
3475 };
1da177e4
LT		 3476 struct rpc_message msg = {
3477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3478 .rpc_argp = &args,
24ad148a 3479 .rpc_resp = &res,
1da177e4
LT		 3480 };
3481
0e574af1 3482 nfs_fattr_init(fsstat->fattr);
7c513058 3483 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3484}
3485
3486static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3487{
3488 struct nfs4_exception exception = { };
3489 int err;
3490 do {
3491 err = nfs4_handle_exception(server,
3492 _nfs4_proc_statfs(server, fhandle, fsstat),
3493 &exception);
3494 } while (exception.retry);
3495 return err;
3496}
3497
3498static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3499 struct nfs_fsinfo *fsinfo)
3500{
3501 struct nfs4_fsinfo_arg args = {
3502 .fh = fhandle,
3503 .bitmask = server->attr_bitmask,
3504 };
3dda5e43
BH		 3505 struct nfs4_fsinfo_res res = {
3506 .fsinfo = fsinfo,
3507 };
1da177e4
LT		 3508 struct rpc_message msg = {
3509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3510 .rpc_argp = &args,
3dda5e43 3511 .rpc_resp = &res,
1da177e4
LT		 3512 };
3513
7c513058 3514 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3515}
3516
3517static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3518{
3519 struct nfs4_exception exception = { };
3520 int err;
3521
3522 do {
3523 err = nfs4_handle_exception(server,
3524 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3525 &exception);
3526 } while (exception.retry);
3527 return err;
3528}
3529
3530static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3531{
e38eb650
BS		 3532 int error;
3533
0e574af1 3534 nfs_fattr_init(fsinfo->fattr);
e38eb650 3535 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3536 if (error == 0) {
3537 /* block layout checks this! */
3538 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3539 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3540 }
e38eb650
BS		 3541
3542 return error;
1da177e4
LT		 3543}
3544
3545static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3546 struct nfs_pathconf *pathconf)
3547{
3548 struct nfs4_pathconf_arg args = {
3549 .fh = fhandle,
3550 .bitmask = server->attr_bitmask,
3551 };
d45b2989
BH		 3552 struct nfs4_pathconf_res res = {
3553 .pathconf = pathconf,
3554 };
1da177e4
LT		 3555 struct rpc_message msg = {
3556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3557 .rpc_argp = &args,
d45b2989 3558 .rpc_resp = &res,
1da177e4
LT		 3559 };
3560
3561 /* None of the pathconf attributes are mandatory to implement */
3562 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3563 memset(pathconf, 0, sizeof(*pathconf));
3564 return 0;
3565 }
3566
0e574af1 3567 nfs_fattr_init(pathconf->fattr);
7c513058 3568 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3569}
3570
3571static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3572 struct nfs_pathconf *pathconf)
3573{
3574 struct nfs4_exception exception = { };
3575 int err;
3576
3577 do {
3578 err = nfs4_handle_exception(server,
3579 _nfs4_proc_pathconf(server, fhandle, pathconf),
3580 &exception);
3581 } while (exception.retry);
3582 return err;
3583}
3584
d20581aa
BH		 3585void __nfs4_read_done_cb(struct nfs_read_data *data)
3586{
cd841605 3587 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3588}
3589
cbdabc7f 3590static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3591{
cd841605 3592 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3593
9e33bed5 3594 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3595 rpc_restart_call_prepare(task);
ec06c096 3596 return -EAGAIN;
1da177e4 3597 }
8850df99 3598
d20581aa 3599 __nfs4_read_done_cb(data);
1da177e4 3600 if (task->tk_status > 0)
ec06c096
TM		 3601 renew_lease(server, data->timestamp);
3602 return 0;
1da177e4
LT		 3603}
3604
cbdabc7f
AA		 3605static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3606{
3607
3608 dprintk("--> %s\n", __func__);
3609
3610 if (!nfs4_sequence_done(task, &data->res.seq_res))
3611 return -EAGAIN;
3612
d20581aa
BH		 3613 return data->read_done_cb ? data->read_done_cb(task, data) :
3614 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3615}
3616
bdc7f021 3617static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3618{
1da177e4 3619 data->timestamp = jiffies;
cbdabc7f 3620 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3621 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3622 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3623}
3624
ea7c3303
BS		 3625static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3626{
cd841605 3627 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3628 &data->args.seq_args,
3629 &data->res.seq_res,
3630 task))
3631 return;
3632 rpc_call_start(task);
1da177e4
LT		 3633}
3634
b029bc9b 3635static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3636{
cd841605 3637 struct inode *inode = data->header->inode;
1da177e4 3638
9e33bed5 3639 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3640 rpc_restart_call_prepare(task);
788e7a89 3641 return -EAGAIN;
1da177e4 3642 }
4f9838c7 3643 if (task->tk_status >= 0) {
1da177e4 3644 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3645 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3646 }
788e7a89 3647 return 0;
1da177e4
LT		 3648}
3649
b029bc9b
FI		 3650static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3651{
3652 if (!nfs4_sequence_done(task, &data->res.seq_res))
3653 return -EAGAIN;
d20581aa
BH		 3654 return data->write_done_cb ? data->write_done_cb(task, data) :
3655 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3656}
3657
5a37f851
TM		 3658static
3659bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3660{
5a37f851
TM		 3661 const struct nfs_pgio_header *hdr = data->header;
3662
3663 /* Don't request attributes for pNFS or O_DIRECT writes */
3664 if (data->ds_clp != NULL || hdr->dreq != NULL)
3665 return false;
3666 /* Otherwise, request attributes if and only if we don't hold
3667 * a delegation
3668 */
011e2a7f 3669 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3670}
a69aef14 3671
bdc7f021 3672static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3673{
cd841605 3674 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3675
5a37f851 3676 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3677 data->args.bitmask = NULL;
3678 data->res.fattr = NULL;
3679 } else
3680 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3681
b029bc9b
FI		 3682 if (!data->write_done_cb)
3683 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3684 data->res.server = server;
1da177e4
LT		 3685 data->timestamp = jiffies;
3686
bdc7f021 3687 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3688 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3689}
3690
c6cb80d0
BS		 3691static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3692{
cd841605 3693 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3694 &data->args.seq_args,
3695 &data->res.seq_res,
3696 task))
3697 return;
3698 rpc_call_start(task);
1da177e4
LT		 3699}
3700
0b7c0153 3701static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3702{
3703 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3704 &data->args.seq_args,
3705 &data->res.seq_res,
3706 task))
3707 return;
3708 rpc_call_start(task);
1da177e4
LT		 3709}
3710
0b7c0153 3711static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3712{
1da177e4 3713 struct inode *inode = data->inode;
14516c3a 3714
9e33bed5 3715 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3716 rpc_restart_call_prepare(task);
788e7a89 3717 return -EAGAIN;
1da177e4 3718 }
788e7a89 3719 return 0;
1da177e4
LT		 3720}
3721
0b7c0153 3722static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3723{
3724 if (!nfs4_sequence_done(task, &data->res.seq_res))
3725 return -EAGAIN;
0b7c0153 3726 return data->commit_done_cb(task, data);
5f452431
FI		 3727}
3728
0b7c0153 3729static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3730{
788e7a89 3731 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3732
0b7c0153
FI		 3733 if (data->commit_done_cb == NULL)
3734 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3735 data->res.server = server;
bdc7f021 3736 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3737 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3738}
3739
9bc4e3ca
CL		 3740struct nfs4_renewdata {
3741 struct nfs_client *client;
3742 unsigned long timestamp;
3743};
3744
1da177e4
LT		 3745/*
3746 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3747 * standalone procedure for queueing an asynchronous RENEW.
3748 */
9bc4e3ca 3749static void nfs4_renew_release(void *calldata)
dc96aef9 3750{
9bc4e3ca
CL		 3751 struct nfs4_renewdata *data = calldata;
3752 struct nfs_client *clp = data->client;
dc96aef9 3753
0851de06
AB		 3754 if (atomic_read(&clp->cl_count) > 1)
3755 nfs4_schedule_state_renewal(clp);
3756 nfs_put_client(clp);
9bc4e3ca 3757 kfree(data);
dc96aef9
AB		 3758}
3759
9bc4e3ca 3760static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3761{
9bc4e3ca
CL		 3762 struct nfs4_renewdata *data = calldata;
3763 struct nfs_client *clp = data->client;
3764 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3765
3766 if (task->tk_status < 0) {
95baa25c 3767 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3768 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3769 return;
3770 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3771 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3772 return;
3773 }
3774 nfs4_schedule_path_down_recovery(clp);
1da177e4 3775 }
452e9352 3776 do_renew_lease(clp, timestamp);
1da177e4
LT		 3777}
3778
963d8fe5
TM		 3779static const struct rpc_call_ops nfs4_renew_ops = {
3780 .rpc_call_done = nfs4_renew_done,
dc96aef9 3781 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3782};
3783
2f60ea6b 3784static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3785{
3786 struct rpc_message msg = {
3787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3788 .rpc_argp = clp,
b4454fe1 3789 .rpc_cred = cred,
1da177e4 3790 };
9bc4e3ca 3791 struct nfs4_renewdata *data;
1da177e4 3792
2f60ea6b
TM		 3793 if (renew_flags == 0)
3794 return 0;
0851de06
AB		 3795 if (!atomic_inc_not_zero(&clp->cl_count))
3796 return -EIO;
b569ad34 3797 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3798 if (data == NULL)
3799 return -ENOMEM;
3800 data->client = clp;
3801 data->timestamp = jiffies;
1da177e4 3802 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3803 &nfs4_renew_ops, data);
1da177e4
LT		 3804}
3805
8534d4ec 3806static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3807{
3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3810 .rpc_argp = clp,
b4454fe1 3811 .rpc_cred = cred,
1da177e4
LT		 3812 };
3813 unsigned long now = jiffies;
3814 int status;
3815
3816 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3817 if (status < 0)
3818 return status;
452e9352 3819 do_renew_lease(clp, now);
1da177e4
LT		 3820 return 0;
3821}
3822
aa1870af
BF		 3823static inline int nfs4_server_supports_acls(struct nfs_server *server)
3824{
3825 return (server->caps & NFS_CAP_ACLS)
3826 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3827 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3828}
3829
21f498c2
TM		 3830/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3831 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3832 * the stack.
3833 */
21f498c2 3834#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3835
e9e3d724
NH		 3836static int buf_to_pages_noslab(const void *buf, size_t buflen,
3837 struct page **pages, unsigned int *pgbase)
3838{
3839 struct page *newpage, **spages;
3840 int rc = 0;
3841 size_t len;
3842 spages = pages;
3843
3844 do {
21f498c2 3845 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3846 newpage = alloc_page(GFP_KERNEL);
3847
3848 if (newpage == NULL)
3849 goto unwind;
3850 memcpy(page_address(newpage), buf, len);
3851 buf += len;
3852 buflen -= len;
3853 *pages++ = newpage;
3854 rc++;
3855 } while (buflen != 0);
3856
3857 return rc;
3858
3859unwind:
3860 for(; rc > 0; rc--)
3861 __free_page(spages[rc-1]);
3862 return -ENOMEM;
3863}
3864
e50a1c2e
BF		 3865struct nfs4_cached_acl {
3866 int cached;
3867 size_t len;
3e9d4154 3868 char data[0];
e50a1c2e
BF		 3869};
3870
3871static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3872{
3873 struct nfs_inode *nfsi = NFS_I(inode);
3874
3875 spin_lock(&inode->i_lock);
3876 kfree(nfsi->nfs4_acl);
3877 nfsi->nfs4_acl = acl;
3878 spin_unlock(&inode->i_lock);
3879}
3880
3881static void nfs4_zap_acl_attr(struct inode *inode)
3882{
3883 nfs4_set_cached_acl(inode, NULL);
3884}
3885
3886static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3887{
3888 struct nfs_inode *nfsi = NFS_I(inode);
3889 struct nfs4_cached_acl *acl;
3890 int ret = -ENOENT;
3891
3892 spin_lock(&inode->i_lock);
3893 acl = nfsi->nfs4_acl;
3894 if (acl == NULL)
3895 goto out;
3896 if (buf == NULL) /* user is just asking for length */
3897 goto out_len;
3898 if (acl->cached == 0)
3899 goto out;
3900 ret = -ERANGE; /* see getxattr(2) man page */
3901 if (acl->len > buflen)
3902 goto out;
3903 memcpy(buf, acl->data, acl->len);
3904out_len:
3905 ret = acl->len;
3906out:
3907 spin_unlock(&inode->i_lock);
3908 return ret;
3909}
3910
5794d21e 3911static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3912{
3913 struct nfs4_cached_acl *acl;
b291f1b1 3914 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3915
1f1ea6c2 3916 if (buflen <= PAGE_SIZE) {
b291f1b1 3917 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3918 if (acl == NULL)
3919 goto out;
3920 acl->cached = 1;
5794d21e 3921 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3922 } else {
3923 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3924 if (acl == NULL)
3925 goto out;
3926 acl->cached = 0;
3927 }
3928 acl->len = acl_len;
3929out:
3930 nfs4_set_cached_acl(inode, acl);
3931}
3932
bf118a34
AA		 3933/*
3934 * The getxattr API returns the required buffer length when called with a
3935 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3936 * the required buf. On a NULL buf, we send a page of data to the server
3937 * guessing that the ACL request can be serviced by a page. If so, we cache
3938 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3939 * the cache. If not so, we throw away the page, and cache the required
3940 * length. The next getxattr call will then produce another round trip to
3941 * the server, this time with the input buf of the required size.
3942 */
16b4289c 3943static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3944{
bf118a34 3945 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3946 struct nfs_getaclargs args = {
3947 .fh = NFS_FH(inode),
3948 .acl_pages = pages,
3949 .acl_len = buflen,
3950 };
663c79b3
BH		 3951 struct nfs_getaclres res = {
3952 .acl_len = buflen,
3953 };
aa1870af
BF		 3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3956 .rpc_argp = &args,
663c79b3 3957 .rpc_resp = &res,
aa1870af 3958 };
21f498c2
TM		 3959 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3960 int ret = -ENOMEM, i;
aa1870af 3961
bf118a34
AA		 3962 /* As long as we're doing a round trip to the server anyway,
3963 * let's be prepared for a page of acl data. */
3964 if (npages == 0)
3965 npages = 1;
21f498c2
TM		 3966 if (npages > ARRAY_SIZE(pages))
3967 return -ERANGE;
5a006899 3968
bf118a34
AA		 3969 for (i = 0; i < npages; i++) {
3970 pages[i] = alloc_page(GFP_KERNEL);
3971 if (!pages[i])
3972 goto out_free;
e50a1c2e 3973 }
5a006899
SP		 3974
3975 /* for decoding across pages */
3976 res.acl_scratch = alloc_page(GFP_KERNEL);
3977 if (!res.acl_scratch)
3978 goto out_free;
3979
bf118a34
AA		 3980 args.acl_len = npages * PAGE_SIZE;
3981 args.acl_pgbase = 0;
5a006899 3982
de040bec 3983 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3984 __func__, buf, buflen, npages, args.acl_len);
3985 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3986 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3987 if (ret)
3988 goto out_free;
bf118a34 3989
1f1ea6c2
TM		 3990 /* Handle the case where the passed-in buffer is too short */
3991 if (res.acl_flags & NFS4_ACL_TRUNC) {
3992 /* Did the user only issue a request for the acl length? */
3993 if (buf == NULL)
3994 goto out_ok;
e50a1c2e 3995 ret = -ERANGE;
1f1ea6c2 3996 goto out_free;
e50a1c2e 3997 }
1f1ea6c2
TM		 3998 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3999 if (buf)
4000 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4001out_ok:
4002 ret = res.acl_len;
e50a1c2e 4003out_free:
bf118a34
AA		 4004 for (i = 0; i < npages; i++)
4005 if (pages[i])
4006 __free_page(pages[i]);
331818f1
TM		 4007 if (res.acl_scratch)
4008 __free_page(res.acl_scratch);
aa1870af
BF		 4009 return ret;
4010}
4011
16b4289c
TM		 4012static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4013{
4014 struct nfs4_exception exception = { };
4015 ssize_t ret;
4016 do {
4017 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4018 if (ret >= 0)
4019 break;
4020 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4021 } while (exception.retry);
4022 return ret;
4023}
4024
e50a1c2e
BF		 4025static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4026{
4027 struct nfs_server *server = NFS_SERVER(inode);
4028 int ret;
4029
4030 if (!nfs4_server_supports_acls(server))
4031 return -EOPNOTSUPP;
4032 ret = nfs_revalidate_inode(server, inode);
4033 if (ret < 0)
4034 return ret;
08a22b39
AK		 4035 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4036 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4037 ret = nfs4_read_cached_acl(inode, buf, buflen);
4038 if (ret != -ENOENT)
bf118a34
AA		 4039 /* -ENOENT is returned if there is no ACL or if there is an ACL
4040 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4041 return ret;
4042 return nfs4_get_acl_uncached(inode, buf, buflen);
4043}
4044
16b4289c 4045static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4046{
4047 struct nfs_server *server = NFS_SERVER(inode);
4048 struct page *pages[NFS4ACL_MAXPAGES];
4049 struct nfs_setaclargs arg = {
4050 .fh = NFS_FH(inode),
4051 .acl_pages = pages,
4052 .acl_len = buflen,
4053 };
73c403a9 4054 struct nfs_setaclres res;
4b580ee3
BF		 4055 struct rpc_message msg = {
4056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4057 .rpc_argp = &arg,
73c403a9 4058 .rpc_resp = &res,
4b580ee3 4059 };
21f498c2 4060 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4061 int ret, i;
4b580ee3
BF		 4062
4063 if (!nfs4_server_supports_acls(server))
4064 return -EOPNOTSUPP;
21f498c2
TM		 4065 if (npages > ARRAY_SIZE(pages))
4066 return -ERANGE;
e9e3d724
NH		 4067 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4068 if (i < 0)
4069 return i;
57ec14c5 4070 nfs4_inode_return_delegation(inode);
7c513058 4071 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4072
4073 /*
4074 * Free each page after tx, so the only ref left is
4075 * held by the network stack
4076 */
4077 for (; i > 0; i--)
4078 put_page(pages[i-1]);
4079
08a22b39
AK		 4080 /*
4081 * Acl update can result in inode attribute update.
4082 * so mark the attribute cache invalid.
4083 */
4084 spin_lock(&inode->i_lock);
4085 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4086 spin_unlock(&inode->i_lock);
f41f7418
TM		 4087 nfs_access_zap_cache(inode);
4088 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4089 return ret;
4090}
4091
16b4289c
TM		 4092static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4093{
4094 struct nfs4_exception exception = { };
4095 int err;
4096 do {
4097 err = nfs4_handle_exception(NFS_SERVER(inode),
4098 __nfs4_proc_set_acl(inode, buf, buflen),
4099 &exception);
4100 } while (exception.retry);
4101 return err;
4102}
4103
1da177e4 4104static int
aa5190d0 4105nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4106{
aa5190d0
TM		 4107 struct nfs_client *clp = server->nfs_client;
4108
4109 if (task->tk_status >= 0)
1da177e4
LT		 4110 return 0;
4111 switch(task->tk_status) {
a1d0b5ee 4112 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4113 case -NFS4ERR_ADMIN_REVOKED:
4114 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4115 if (state == NULL)
4116 break;
4117 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4118 case -NFS4ERR_OPENMODE:
4119 if (state == NULL)
4120 break;
0400a6b0
TM		 4121 nfs4_schedule_stateid_recovery(server, state);
4122 goto wait_on_recovery;
0ced63d1
TM		 4123 case -NFS4ERR_EXPIRED:
4124 if (state != NULL)
4125 nfs4_schedule_stateid_recovery(server, state);
1da177e4 4126 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4127 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4128 nfs4_schedule_lease_recovery(clp);
4129 goto wait_on_recovery;
4745e315
AA		 4130#if defined(CONFIG_NFS_V4_1)
4131 case -NFS4ERR_BADSESSION:
4132 case -NFS4ERR_BADSLOT:
4133 case -NFS4ERR_BAD_HIGH_SLOT:
4134 case -NFS4ERR_DEADSESSION:
4135 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4136 case -NFS4ERR_SEQ_FALSE_RETRY:
4137 case -NFS4ERR_SEQ_MISORDERED:
4138 dprintk("%s ERROR %d, Reset session\n", __func__,
4139 task->tk_status);
9f594791 4140 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4141 task->tk_status = 0;
4142 return -EAGAIN;
4143#endif /* CONFIG_NFS_V4_1 */
1da177e4 4144 case -NFS4ERR_DELAY:
aa5190d0 4145 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4146 case -NFS4ERR_GRACE:
2c643488 4147 case -EKEYEXPIRED:
1da177e4
LT		 4148 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4149 task->tk_status = 0;
4150 return -EAGAIN;
a8a4ae3a 4151 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4152 case -NFS4ERR_OLD_STATEID:
4153 task->tk_status = 0;
4154 return -EAGAIN;
4155 }
4156 task->tk_status = nfs4_map_errors(task->tk_status);
4157 return 0;
0400a6b0 4158wait_on_recovery:
a2c0b9e2 4159 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4160 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4161 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4162 task->tk_status = 0;
4163 return -EAGAIN;
1da177e4
LT		 4164}
4165
f092075d
CL		 4166static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4167 nfs4_verifier *bootverf)
cd93710e
CL		 4168{
4169 __be32 verf[2];
4170
2c820d9a
CL		 4171 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4172 /* An impossible timestamp guarantees this value
4173 * will never match a generated boot time. */
4174 verf[0] = 0;
4175 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4176 } else {
f092075d
CL		 4177 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4178 verf[0] = (__be32)nn->boot_time.tv_sec;
4179 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4180 }
cd93710e
CL		 4181 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4182}
4183
e984a55a
CL		 4184static unsigned int
4185nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4186 char *buf, size_t len)
4187{
4188 unsigned int result;
4189
4190 rcu_read_lock();
4191 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4192 clp->cl_ipaddr,
4193 rpc_peeraddr2str(clp->cl_rpcclient,
4194 RPC_DISPLAY_ADDR),
4195 rpc_peeraddr2str(clp->cl_rpcclient,
4196 RPC_DISPLAY_PROTO));
4197 rcu_read_unlock();
4198 return result;
4199}
4200
4201static unsigned int
4202nfs4_init_uniform_client_string(const struct nfs_client *clp,
4203 char *buf, size_t len)
4204{
6f2ea7f2
CL		 4205 char *nodename = clp->cl_rpcclient->cl_nodename;
4206
4207 if (nfs4_client_id_uniquifier[0] != '\0')
4208 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4209 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4210 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4211 nodename);
e984a55a
CL		 4212}
4213
6bbb4ae8
CL		 4214/**
4215 * nfs4_proc_setclientid - Negotiate client ID
4216 * @clp: state data structure
4217 * @program: RPC program for NFSv4 callback service
4218 * @port: IP port number for NFS4 callback service
4219 * @cred: RPC credential to use for this call
4220 * @res: where to place the result
4221 *
4222 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4223 */
bb8b27e5
TM		 4224int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4225 unsigned short port, struct rpc_cred *cred,
4226 struct nfs4_setclientid_res *res)
1da177e4
LT		 4227{
4228 nfs4_verifier sc_verifier;
4229 struct nfs4_setclientid setclientid = {
4230 .sc_verifier = &sc_verifier,
4231 .sc_prog = program,
f4eecd5d 4232 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4233 };
4234 struct rpc_message msg = {
4235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4236 .rpc_argp = &setclientid,
bb8b27e5 4237 .rpc_resp = res,
286d7d6a 4238 .rpc_cred = cred,
1da177e4 4239 };
6bbb4ae8 4240 int status;
1da177e4 4241
de734831 4242 /* nfs_client_id4 */
f092075d 4243 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4244 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4245 setclientid.sc_name_len =
4246 nfs4_init_uniform_client_string(clp,
4247 setclientid.sc_name,
4248 sizeof(setclientid.sc_name));
4249 else
4250 setclientid.sc_name_len =
4251 nfs4_init_nonuniform_client_string(clp,
4252 setclientid.sc_name,
4253 sizeof(setclientid.sc_name));
de734831 4254 /* cb_client4 */
e984a55a 4255 rcu_read_lock();
de734831 4256 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4257 sizeof(setclientid.sc_netid),
4258 rpc_peeraddr2str(clp->cl_rpcclient,
4259 RPC_DISPLAY_NETID));
de734831
CL		 4260 rcu_read_unlock();
4261 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4262 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4263 clp->cl_ipaddr, port >> 8, port & 255);
4264
6bbb4ae8
CL		 4265 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4266 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4267 setclientid.sc_name_len, setclientid.sc_name);
4268 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4269 dprintk("NFS reply setclientid: %d\n", status);
4270 return status;
1da177e4
LT		 4271}
4272
6bbb4ae8
CL		 4273/**
4274 * nfs4_proc_setclientid_confirm - Confirm client ID
4275 * @clp: state data structure
4276 * @res: result of a previous SETCLIENTID
4277 * @cred: RPC credential to use for this call
4278 *
4279 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4280 */
fd954ae1 4281int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4282 struct nfs4_setclientid_res *arg,
4283 struct rpc_cred *cred)
1da177e4
LT		 4284{
4285 struct nfs_fsinfo fsinfo;
4286 struct rpc_message msg = {
4287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4288 .rpc_argp = arg,
1da177e4 4289 .rpc_resp = &fsinfo,
286d7d6a 4290 .rpc_cred = cred,
1da177e4
LT		 4291 };
4292 unsigned long now;
4293 int status;
4294
6bbb4ae8
CL		 4295 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4296 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4297 clp->cl_clientid);
1da177e4 4298 now = jiffies;
1bd714f2 4299 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4300 if (status == 0) {
4301 spin_lock(&clp->cl_lock);
4302 clp->cl_lease_time = fsinfo.lease_time * HZ;
4303 clp->cl_last_renewal = now;
4304 spin_unlock(&clp->cl_lock);
4305 }
6bbb4ae8 4306 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4307 return status;
4308}
4309
fe650407
TM		 4310struct nfs4_delegreturndata {
4311 struct nfs4_delegreturnargs args;
fa178f29 4312 struct nfs4_delegreturnres res;
fe650407
TM		 4313 struct nfs_fh fh;
4314 nfs4_stateid stateid;
26e976a8 4315 unsigned long timestamp;
fa178f29 4316 struct nfs_fattr fattr;
fe650407
TM		 4317 int rpc_status;
4318};
4319
fe650407
TM		 4320static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4321{
4322 struct nfs4_delegreturndata *data = calldata;
938e1010 4323
14516c3a
TM		 4324 if (!nfs4_sequence_done(task, &data->res.seq_res))
4325 return;
938e1010 4326
79708861
RL		 4327 switch (task->tk_status) {
4328 case -NFS4ERR_STALE_STATEID:
4329 case -NFS4ERR_EXPIRED:
4330 case 0:
fa178f29 4331 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4332 break;
4333 default:
4334 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4335 -EAGAIN) {
d00c5d43 4336 rpc_restart_call_prepare(task);
79708861
RL		 4337 return;
4338 }
4339 }
4340 data->rpc_status = task->tk_status;
fe650407
TM		 4341}
4342
4343static void nfs4_delegreturn_release(void *calldata)
4344{
fe650407
TM		 4345 kfree(calldata);
4346}
4347
938e1010
AA		 4348#if defined(CONFIG_NFS_V4_1)
4349static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4350{
4351 struct nfs4_delegreturndata *d_data;
4352
4353 d_data = (struct nfs4_delegreturndata *)data;
4354
035168ab 4355 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4356 &d_data->args.seq_args,
9d12b216 4357 &d_data->res.seq_res, task))
938e1010
AA		 4358 return;
4359 rpc_call_start(task);
4360}
4361#endif /* CONFIG_NFS_V4_1 */
4362
c8d149f3 4363static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4364#if defined(CONFIG_NFS_V4_1)
4365 .rpc_call_prepare = nfs4_delegreturn_prepare,
4366#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4367 .rpc_call_done = nfs4_delegreturn_done,
4368 .rpc_release = nfs4_delegreturn_release,
4369};
4370
e6f81075 4371static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4372{
4373 struct nfs4_delegreturndata *data;
fa178f29 4374 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4375 struct rpc_task *task;
5138fde0
TM		 4376 struct rpc_message msg = {
4377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4378 .rpc_cred = cred,
4379 };
c970aa85
TM		 4380 struct rpc_task_setup task_setup_data = {
4381 .rpc_client = server->client,
5138fde0 4382 .rpc_message = &msg,
c970aa85
TM		 4383 .callback_ops = &nfs4_delegreturn_ops,
4384 .flags = RPC_TASK_ASYNC,
4385 };
e6f81075 4386 int status = 0;
fe650407 4387
8535b2be 4388 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4389 if (data == NULL)
4390 return -ENOMEM;
9d12b216 4391 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4392 data->args.fhandle = &data->fh;
4393 data->args.stateid = &data->stateid;
9e907fec 4394 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4395 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4396 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4397 data->res.fattr = &data->fattr;
4398 data->res.server = server;
5138fde0 4399 nfs_fattr_init(data->res.fattr);
26e976a8 4400 data->timestamp = jiffies;
fe650407
TM		 4401 data->rpc_status = 0;
4402
c970aa85 4403 task_setup_data.callback_data = data;
1174dd1f
TM		 4404 msg.rpc_argp = &data->args;
4405 msg.rpc_resp = &data->res;
c970aa85 4406 task = rpc_run_task(&task_setup_data);
7a1218a2 4407 if (IS_ERR(task))
fe650407 4408 return PTR_ERR(task);
e6f81075
TM		 4409 if (!issync)
4410 goto out;
fe650407 4411 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4412 if (status != 0)
4413 goto out;
4414 status = data->rpc_status;
e144cbcc
TM		 4415 if (status == 0)
4416 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4417 else
4418 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4419out:
e6b3c4db 4420 rpc_put_task(task);
fe650407 4421 return status;
1da177e4
LT		 4422}
4423
e6f81075 4424int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4425{
4426 struct nfs_server *server = NFS_SERVER(inode);
4427 struct nfs4_exception exception = { };
4428 int err;
4429 do {
e6f81075 4430 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4431 switch (err) {
4432 case -NFS4ERR_STALE_STATEID:
4433 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4434 case 0:
4435 return 0;
4436 }
4437 err = nfs4_handle_exception(server, err, &exception);
4438 } while (exception.retry);
4439 return err;
4440}
4441
4442#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4443#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4444
4445/*
4446 * sleep, with exponential backoff, and retry the LOCK operation.
4447 */
4448static unsigned long
4449nfs4_set_lock_task_retry(unsigned long timeout)
4450{
d310310c 4451 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4452 timeout <<= 1;
4453 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4454 return NFS4_LOCK_MAXTIMEOUT;
4455 return timeout;
4456}
4457
1da177e4
LT		 4458static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4459{
4460 struct inode *inode = state->inode;
4461 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4462 struct nfs_client *clp = server->nfs_client;
911d1aaf 4463 struct nfs_lockt_args arg = {
1da177e4 4464 .fh = NFS_FH(inode),
911d1aaf 4465 .fl = request,
1da177e4 4466 };
911d1aaf
TM		 4467 struct nfs_lockt_res res = {
4468 .denied = request,
1da177e4
LT		 4469 };
4470 struct rpc_message msg = {
4471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4472 .rpc_argp = &arg,
4473 .rpc_resp = &res,
4474 .rpc_cred = state->owner->so_cred,
4475 };
1da177e4
LT		 4476 struct nfs4_lock_state *lsp;
4477 int status;
4478
911d1aaf 4479 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4480 status = nfs4_set_lock_state(state, request);
4481 if (status != 0)
4482 goto out;
4483 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4484 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4485 arg.lock_owner.s_dev = server->s_dev;
7c513058 4486 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4487 switch (status) {
4488 case 0:
4489 request->fl_type = F_UNLCK;
4490 break;
4491 case -NFS4ERR_DENIED:
4492 status = 0;
1da177e4 4493 }
70cc6487 4494 request->fl_ops->fl_release_private(request);
8d0a8a9d 4495out:
1da177e4
LT		 4496 return status;
4497}
4498
4499static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4500{
4501 struct nfs4_exception exception = { };
4502 int err;
4503
4504 do {
4505 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4506 _nfs4_proc_getlk(state, cmd, request),
4507 &exception);
4508 } while (exception.retry);
4509 return err;
4510}
4511
4512static int do_vfs_lock(struct file *file, struct file_lock *fl)
4513{
4514 int res = 0;
4515 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4516 case FL_POSIX:
4517 res = posix_lock_file_wait(file, fl);
4518 break;
4519 case FL_FLOCK:
4520 res = flock_lock_file_wait(file, fl);
4521 break;
4522 default:
4523 BUG();
4524 }
1da177e4
LT		 4525 return res;
4526}
4527
faf5f49c 4528struct nfs4_unlockdata {
911d1aaf
TM		 4529 struct nfs_locku_args arg;
4530 struct nfs_locku_res res;
faf5f49c
TM		 4531 struct nfs4_lock_state *lsp;
4532 struct nfs_open_context *ctx;
911d1aaf
TM		 4533 struct file_lock fl;
4534 const struct nfs_server *server;
26e976a8 4535 unsigned long timestamp;
faf5f49c
TM		 4536};
4537
911d1aaf
TM		 4538static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4539 struct nfs_open_context *ctx,
4540 struct nfs4_lock_state *lsp,
4541 struct nfs_seqid *seqid)
4542{
4543 struct nfs4_unlockdata *p;
4544 struct inode *inode = lsp->ls_state->inode;
4545
8535b2be 4546 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4547 if (p == NULL)
4548 return NULL;
4549 p->arg.fh = NFS_FH(inode);
4550 p->arg.fl = &p->fl;
4551 p->arg.seqid = seqid;
c1d51931 4552 p->res.seqid = seqid;
911d1aaf
TM		 4553 p->arg.stateid = &lsp->ls_stateid;
4554 p->lsp = lsp;
4555 atomic_inc(&lsp->ls_count);
4556 /* Ensure we don't close file until we're done freeing locks! */
4557 p->ctx = get_nfs_open_context(ctx);
4558 memcpy(&p->fl, fl, sizeof(p->fl));
4559 p->server = NFS_SERVER(inode);
4560 return p;
4561}
4562
06f814a3 4563static void nfs4_locku_release_calldata(void *data)
faf5f49c 4564{
963d8fe5 4565 struct nfs4_unlockdata *calldata = data;
911d1aaf 4566 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4567 nfs4_put_lock_state(calldata->lsp);
4568 put_nfs_open_context(calldata->ctx);
4569 kfree(calldata);
faf5f49c
TM		 4570}
4571
963d8fe5 4572static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4573{
963d8fe5 4574 struct nfs4_unlockdata *calldata = data;
faf5f49c 4575
14516c3a
TM		 4576 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4577 return;
faf5f49c
TM		 4578 switch (task->tk_status) {
4579 case 0:
f597c537
TM		 4580 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4581 &calldata->res.stateid);
26e976a8 4582 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4583 break;
9e33bed5
TM		 4584 case -NFS4ERR_BAD_STATEID:
4585 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4586 case -NFS4ERR_STALE_STATEID:
4587 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4588 break;
4589 default:
9e33bed5 4590 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4591 rpc_restart_call_prepare(task);
faf5f49c 4592 }
2b1bc308 4593 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4594}
4595
4ce70ada 4596static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4597{
4ce70ada 4598 struct nfs4_unlockdata *calldata = data;
faf5f49c 4599
911d1aaf 4600 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4601 return;
795a88c9 4602 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4603 /* Note: exit _without_ running nfs4_locku_done */
4604 task->tk_action = NULL;
faf5f49c
TM		 4605 return;
4606 }
26e976a8 4607 calldata->timestamp = jiffies;
035168ab 4608 if (nfs4_setup_sequence(calldata->server,
a893693c 4609 &calldata->arg.seq_args,
2240a9e2
TM		 4610 &calldata->res.seq_res,
4611 task) != 0)
4612 nfs_release_seqid(calldata->arg.seqid);
4613 else
4614 rpc_call_start(task);
faf5f49c
TM		 4615}
4616
963d8fe5 4617static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4618 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4619 .rpc_call_done = nfs4_locku_done,
06f814a3 4620 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4621};
4622
a5d16a4d
TM		 4623static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4624 struct nfs_open_context *ctx,
4625 struct nfs4_lock_state *lsp,
4626 struct nfs_seqid *seqid)
4627{
4628 struct nfs4_unlockdata *data;
5138fde0
TM		 4629 struct rpc_message msg = {
4630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4631 .rpc_cred = ctx->cred,
4632 };
c970aa85
TM		 4633 struct rpc_task_setup task_setup_data = {
4634 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4635 .rpc_message = &msg,
c970aa85 4636 .callback_ops = &nfs4_locku_ops,
101070ca 4637 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4638 .flags = RPC_TASK_ASYNC,
4639 };
a5d16a4d 4640
137d6aca
FF		 4641 /* Ensure this is an unlock - when canceling a lock, the
4642 * canceled lock is passed in, and it won't be an unlock.
4643 */
4644 fl->fl_type = F_UNLCK;
4645
a5d16a4d
TM		 4646 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4647 if (data == NULL) {
4648 nfs_free_seqid(seqid);
4649 return ERR_PTR(-ENOMEM);
4650 }
4651
9d12b216 4652 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4653 msg.rpc_argp = &data->arg;
4654 msg.rpc_resp = &data->res;
c970aa85
TM		 4655 task_setup_data.callback_data = data;
4656 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4657}
4658
faf5f49c
TM		 4659static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4660{
19e03c57 4661 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4662 struct nfs_seqid *seqid;
1da177e4 4663 struct nfs4_lock_state *lsp;
06f814a3
TM		 4664 struct rpc_task *task;
4665 int status = 0;
536ff0f8 4666 unsigned char fl_flags = request->fl_flags;
faf5f49c 4667
8d0a8a9d 4668 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4669 /* Unlock _before_ we do the RPC call */
4670 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4671 down_read(&nfsi->rwsem);
4672 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4673 up_read(&nfsi->rwsem);
9b073574 4674 goto out;
19e03c57
TM		 4675 }
4676 up_read(&nfsi->rwsem);
8d0a8a9d 4677 if (status != 0)
9b073574
TM		 4678 goto out;
4679 /* Is this a delegated lock? */
4680 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4681 goto out;
8d0a8a9d 4682 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4683 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4684 status = -ENOMEM;
911d1aaf 4685 if (seqid == NULL)
9b073574 4686 goto out;
cd3758e3 4687 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4688 status = PTR_ERR(task);
4689 if (IS_ERR(task))
9b073574 4690 goto out;
a5d16a4d 4691 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4692 rpc_put_task(task);
9b073574 4693out:
536ff0f8 4694 request->fl_flags = fl_flags;
1da177e4
LT		 4695 return status;
4696}
4697
a5d16a4d
TM		 4698struct nfs4_lockdata {
4699 struct nfs_lock_args arg;
4700 struct nfs_lock_res res;
4701 struct nfs4_lock_state *lsp;
4702 struct nfs_open_context *ctx;
4703 struct file_lock fl;
26e976a8 4704 unsigned long timestamp;
a5d16a4d
TM		 4705 int rpc_status;
4706 int cancelled;
66179efe 4707 struct nfs_server *server;
a5d16a4d
TM		 4708};
4709
4710static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4711 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4712 gfp_t gfp_mask)
1da177e4 4713{
a5d16a4d
TM		 4714 struct nfs4_lockdata *p;
4715 struct inode *inode = lsp->ls_state->inode;
1da177e4 4716 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4717
8535b2be 4718 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4719 if (p == NULL)
4720 return NULL;
4721
4722 p->arg.fh = NFS_FH(inode);
4723 p->arg.fl = &p->fl;
8535b2be 4724 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4725 if (p->arg.open_seqid == NULL)
4726 goto out_free;
8535b2be 4727 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4728 if (p->arg.lock_seqid == NULL)
2f74c0a0 4729 goto out_free_seqid;
a5d16a4d 4730 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4731 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4732 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4733 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4734 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4735 p->lsp = lsp;
66179efe 4736 p->server = server;
a5d16a4d
TM		 4737 atomic_inc(&lsp->ls_count);
4738 p->ctx = get_nfs_open_context(ctx);
4739 memcpy(&p->fl, fl, sizeof(p->fl));
4740 return p;
2f74c0a0
TM		 4741out_free_seqid:
4742 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4743out_free:
4744 kfree(p);
4745 return NULL;
4746}
4747
4748static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4749{
4750 struct nfs4_lockdata *data = calldata;
4751 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4752
3110ff80 4753 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4754 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4755 return;
a5d16a4d
TM		 4756 /* Do we need to do an open_to_lock_owner? */
4757 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970 4758 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
2240a9e2 4759 goto out_release_lock_seqid;
a5d16a4d
TM		 4760 data->arg.open_stateid = &state->stateid;
4761 data->arg.new_lock_owner = 1;
c1d51931 4762 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4763 } else
4764 data->arg.new_lock_owner = 0;
26e976a8 4765 data->timestamp = jiffies;
035168ab
TM		 4766 if (nfs4_setup_sequence(data->server,
4767 &data->arg.seq_args,
2240a9e2
TM		 4768 &data->res.seq_res,
4769 task) == 0) {
4770 rpc_call_start(task);
66179efe 4771 return;
2240a9e2
TM		 4772 }
4773 nfs_release_seqid(data->arg.open_seqid);
4774out_release_lock_seqid:
4775 nfs_release_seqid(data->arg.lock_seqid);
4776 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
a5d16a4d
TM		 4777}
4778
b257957e
AB		 4779static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4780{
4781 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4782 nfs4_lock_prepare(task, calldata);
4783}
4784
a5d16a4d
TM		 4785static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4786{
4787 struct nfs4_lockdata *data = calldata;
4788
3110ff80 4789 dprintk("%s: begin!\n", __func__);
a5d16a4d 4790
14516c3a
TM		 4791 if (!nfs4_sequence_done(task, &data->res.seq_res))
4792 return;
66179efe 4793
a5d16a4d 4794 data->rpc_status = task->tk_status;
a5d16a4d 4795 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4796 if (data->rpc_status == 0)
4797 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4798 else
4799 goto out;
4800 }
4801 if (data->rpc_status == 0) {
f597c537 4802 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4803 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4804 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4805 }
a5d16a4d 4806out:
3110ff80 4807 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4808}
4809
4810static void nfs4_lock_release(void *calldata)
4811{
4812 struct nfs4_lockdata *data = calldata;
4813
3110ff80 4814 dprintk("%s: begin!\n", __func__);
2f74c0a0 4815 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4816 if (data->cancelled != 0) {
4817 struct rpc_task *task;
4818 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4819 data->arg.lock_seqid);
4820 if (!IS_ERR(task))
bf294b41 4821 rpc_put_task_async(task);
3110ff80 4822 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4823 } else
4824 nfs_free_seqid(data->arg.lock_seqid);
4825 nfs4_put_lock_state(data->lsp);
4826 put_nfs_open_context(data->ctx);
4827 kfree(data);
3110ff80 4828 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4829}
4830
4831static const struct rpc_call_ops nfs4_lock_ops = {
4832 .rpc_call_prepare = nfs4_lock_prepare,
4833 .rpc_call_done = nfs4_lock_done,
4834 .rpc_release = nfs4_lock_release,
4835};
4836
b257957e
AB		 4837static const struct rpc_call_ops nfs4_recover_lock_ops = {
4838 .rpc_call_prepare = nfs4_recover_lock_prepare,
4839 .rpc_call_done = nfs4_lock_done,
4840 .rpc_release = nfs4_lock_release,
4841};
4842
2bee72a6
TM		 4843static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4844{
2bee72a6
TM		 4845 switch (error) {
4846 case -NFS4ERR_ADMIN_REVOKED:
4847 case -NFS4ERR_BAD_STATEID:
ecac799a 4848 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4849 if (new_lock_owner != 0 ||
795a88c9 4850 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4851 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4852 break;
4853 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4854 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4855 case -NFS4ERR_EXPIRED:
4856 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4857 };
4858}
4859
afe6c27c 4860static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4861{
4862 struct nfs4_lockdata *data;
4863 struct rpc_task *task;
5138fde0
TM		 4864 struct rpc_message msg = {
4865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4866 .rpc_cred = state->owner->so_cred,
4867 };
c970aa85
TM		 4868 struct rpc_task_setup task_setup_data = {
4869 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4870 .rpc_message = &msg,
c970aa85 4871 .callback_ops = &nfs4_lock_ops,
101070ca 4872 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4873 .flags = RPC_TASK_ASYNC,
4874 };
a5d16a4d
TM		 4875 int ret;
4876
3110ff80 4877 dprintk("%s: begin!\n", __func__);
cd3758e3 4878 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4879 fl->fl_u.nfs4_fl.owner,
4880 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4881 if (data == NULL)
4882 return -ENOMEM;
4883 if (IS_SETLKW(cmd))
4884 data->arg.block = 1;
b257957e
AB		 4885 if (recovery_type > NFS_LOCK_NEW) {
4886 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4887 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4888 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4889 }
9d12b216 4890 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4891 msg.rpc_argp = &data->arg;
4892 msg.rpc_resp = &data->res;
c970aa85
TM		 4893 task_setup_data.callback_data = data;
4894 task = rpc_run_task(&task_setup_data);
7a1218a2 4895 if (IS_ERR(task))
a5d16a4d 4896 return PTR_ERR(task);
a5d16a4d
TM		 4897 ret = nfs4_wait_for_completion_rpc_task(task);
4898 if (ret == 0) {
4899 ret = data->rpc_status;
2bee72a6
TM		 4900 if (ret)
4901 nfs4_handle_setlk_error(data->server, data->lsp,
4902 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4903 } else
4904 data->cancelled = 1;
e6b3c4db 4905 rpc_put_task(task);
3110ff80 4906 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4907 return ret;
1da177e4
LT		 4908}
4909
4910static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4911{
202b50dc 4912 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4913 struct nfs4_exception exception = {
4914 .inode = state->inode,
4915 };
202b50dc
TM		 4916 int err;
4917
4918 do {
42a2d13e
TM		 4919 /* Cache the lock if possible... */
4920 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4921 return 0;
afe6c27c 4922 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4923 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4924 break;
4925 nfs4_handle_exception(server, err, &exception);
4926 } while (exception.retry);
4927 return err;
1da177e4
LT		 4928}
4929
4930static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4931{
202b50dc 4932 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4933 struct nfs4_exception exception = {
4934 .inode = state->inode,
4935 };
202b50dc
TM		 4936 int err;
4937
6bfc93ef
TM		 4938 err = nfs4_set_lock_state(state, request);
4939 if (err != 0)
4940 return err;
202b50dc 4941 do {
42a2d13e
TM		 4942 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4943 return 0;
afe6c27c 4944 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4945 switch (err) {
4946 default:
4947 goto out;
4948 case -NFS4ERR_GRACE:
4949 case -NFS4ERR_DELAY:
4950 nfs4_handle_exception(server, err, &exception);
4951 err = 0;
4952 }
202b50dc 4953 } while (exception.retry);
a9ed2e25 4954out:
202b50dc 4955 return err;
1da177e4
LT		 4956}
4957
f062eb6c 4958#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4959/**
4960 * nfs41_check_expired_locks - possibly free a lock stateid
4961 *
4962 * @state: NFSv4 state for an inode
4963 *
4964 * Returns NFS_OK if recovery for this stateid is now finished.
4965 * Otherwise a negative NFS4ERR value is returned.
4966 */
b01dd1d8 4967static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4968{
eb64cf96 4969 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4970 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4971 struct nfs_server *server = NFS_SERVER(state->inode);
4972
b01dd1d8 4973 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4974 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4975 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4976 if (status != NFS_OK) {
3e60ffdd
CL		 4977 /* Free the stateid unless the server
4978 * informs us the stateid is unrecognized. */
89af2739
CL		 4979 if (status != -NFS4ERR_BAD_STATEID)
4980 nfs41_free_stateid(server,
4981 &lsp->ls_stateid);
795a88c9 4982 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4983 ret = status;
4984 }
4985 }
4986 };
4987
4988 return ret;
4989}
4990
4991static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4992{
4993 int status = NFS_OK;
4994
4995 if (test_bit(LK_STATE_IN_USE, &state->flags))
4996 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4997 if (status != NFS_OK)
4998 status = nfs4_lock_expired(state, request);
4999 return status;
f062eb6c
BS		 5000}
5001#endif
5002
1da177e4
LT		 5003static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5004{
19e03c57 5005 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5006 unsigned char fl_flags = request->fl_flags;
8e469ebd 5007 int status = -ENOLCK;
1da177e4 5008
8e469ebd
TM		 5009 if ((fl_flags & FL_POSIX) &&
5010 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5011 goto out;
6bfc93ef 5012 /* Is this a delegated open? */
6bfc93ef
TM		 5013 status = nfs4_set_lock_state(state, request);
5014 if (status != 0)
5015 goto out;
01c3b861
TM		 5016 request->fl_flags |= FL_ACCESS;
5017 status = do_vfs_lock(request->fl_file, request);
5018 if (status < 0)
5019 goto out;
19e03c57 5020 down_read(&nfsi->rwsem);
01c3b861 5021 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5022 /* Yes: cache locks! */
01c3b861 5023 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5024 request->fl_flags = fl_flags & ~FL_SLEEP;
5025 status = do_vfs_lock(request->fl_file, request);
5026 goto out_unlock;
01c3b861 5027 }
afe6c27c 5028 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5029 if (status != 0)
01c3b861 5030 goto out_unlock;
6bfc93ef 5031 /* Note: we always want to sleep here! */
01c3b861 5032 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5033 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5034 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5035 "manager!\n", __func__);
01c3b861 5036out_unlock:
19e03c57 5037 up_read(&nfsi->rwsem);
01c3b861
TM		 5038out:
5039 request->fl_flags = fl_flags;
1da177e4
LT		 5040 return status;
5041}
5042
5043static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5044{
a1d0b5ee
TM		 5045 struct nfs4_exception exception = {
5046 .state = state,
05ffe24f 5047 .inode = state->inode,
a1d0b5ee 5048 };
1da177e4
LT		 5049 int err;
5050
5051 do {
965b5d67
TM		 5052 err = _nfs4_proc_setlk(state, cmd, request);
5053 if (err == -NFS4ERR_DENIED)
5054 err = -EAGAIN;
1da177e4 5055 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5056 err, &exception);
1da177e4
LT		 5057 } while (exception.retry);
5058 return err;
5059}
5060
5061static int
5062nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5063{
5064 struct nfs_open_context *ctx;
5065 struct nfs4_state *state;
5066 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5067 int status;
5068
5069 /* verify open state */
cd3758e3 5070 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5071 state = ctx->state;
5072
5073 if (request->fl_start < 0 || request->fl_end < 0)
5074 return -EINVAL;
5075
d953126a
TM		 5076 if (IS_GETLK(cmd)) {
5077 if (state != NULL)
5078 return nfs4_proc_getlk(state, F_GETLK, request);
5079 return 0;
5080 }
1da177e4
LT		 5081
5082 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5083 return -EINVAL;
5084
d953126a
TM		 5085 if (request->fl_type == F_UNLCK) {
5086 if (state != NULL)
5087 return nfs4_proc_unlck(state, cmd, request);
5088 return 0;
5089 }
1da177e4 5090
d953126a
TM		 5091 if (state == NULL)
5092 return -ENOLCK;
55725513
TM		 5093 /*
5094 * Don't rely on the VFS having checked the file open mode,
5095 * since it won't do this for flock() locks.
5096 */
f44106e2 5097 switch (request->fl_type) {
55725513
TM		 5098 case F_RDLCK:
5099 if (!(filp->f_mode & FMODE_READ))
5100 return -EBADF;
5101 break;
5102 case F_WRLCK:
5103 if (!(filp->f_mode & FMODE_WRITE))
5104 return -EBADF;
5105 }
5106
1da177e4
LT		 5107 do {
5108 status = nfs4_proc_setlk(state, cmd, request);
5109 if ((status != -EAGAIN) || IS_SETLK(cmd))
5110 break;
5111 timeout = nfs4_set_lock_task_retry(timeout);
5112 status = -ERESTARTSYS;
5113 if (signalled())
5114 break;
5115 } while(status < 0);
1da177e4
LT		 5116 return status;
5117}
5118
888e694c
TM		 5119int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5120{
5121 struct nfs_server *server = NFS_SERVER(state->inode);
5122 struct nfs4_exception exception = { };
5123 int err;
5124
5125 err = nfs4_set_lock_state(state, fl);
5126 if (err != 0)
5127 goto out;
5128 do {
afe6c27c 5129 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5130 switch (err) {
5131 default:
a030889a
WAA		 5132 printk(KERN_ERR "NFS: %s: unhandled error "
5133 "%d.\n", __func__, err);
d5122201 5134 case 0:
965b5d67 5135 case -ESTALE:
d5122201
TM		 5136 goto out;
5137 case -NFS4ERR_EXPIRED:
0ced63d1 5138 nfs4_schedule_stateid_recovery(server, state);
d5122201 5139 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5140 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 5141 nfs4_schedule_lease_recovery(server->nfs_client);
5142 goto out;
74e7bb73
RL		 5143 case -NFS4ERR_BADSESSION:
5144 case -NFS4ERR_BADSLOT:
5145 case -NFS4ERR_BAD_HIGH_SLOT:
5146 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5147 case -NFS4ERR_DEADSESSION:
9f594791 5148 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 5149 goto out;
965b5d67
TM		 5150 case -ERESTARTSYS:
5151 /*
5152 * The show must go on: exit, but mark the
5153 * stateid as needing recovery.
5154 */
a1d0b5ee 5155 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5156 case -NFS4ERR_ADMIN_REVOKED:
5157 case -NFS4ERR_BAD_STATEID:
5158 case -NFS4ERR_OPENMODE:
0400a6b0 5159 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5160 err = 0;
5161 goto out;
168667c4
TM		 5162 case -EKEYEXPIRED:
5163 /*
5164 * User RPCSEC_GSS context has expired.
5165 * We cannot recover this stateid now, so
5166 * skip it and allow recovery thread to
5167 * proceed.
5168 */
5169 err = 0;
5170 goto out;
965b5d67
TM		 5171 case -ENOMEM:
5172 case -NFS4ERR_DENIED:
5173 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5174 err = 0;
5175 goto out;
d5122201
TM		 5176 case -NFS4ERR_DELAY:
5177 break;
5178 }
888e694c
TM		 5179 err = nfs4_handle_exception(server, err, &exception);
5180 } while (exception.retry);
5181out:
5182 return err;
5183}
6b3b5496 5184
cf470c3e
TM		 5185struct nfs_release_lockowner_data {
5186 struct nfs4_lock_state *lsp;
5ae67c4f 5187 struct nfs_server *server;
cf470c3e
TM		 5188 struct nfs_release_lockowner_args args;
5189};
5190
d3c7b7cc
TM		 5191static void nfs4_release_lockowner_release(void *calldata)
5192{
cf470c3e 5193 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5194 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5195 kfree(calldata);
5196}
5197
17280175 5198static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5199 .rpc_release = nfs4_release_lockowner_release,
5200};
5201
cf470c3e 5202int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5203{
5204 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5205 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5206 struct rpc_message msg = {
5207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5208 };
5209
5210 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5211 return -EINVAL;
5212 data = kmalloc(sizeof(*data), GFP_NOFS);
5213 if (!data)
5214 return -ENOMEM;
5215 data->lsp = lsp;
5ae67c4f 5216 data->server = server;
cf470c3e
TM		 5217 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5218 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5219 data->args.lock_owner.s_dev = server->s_dev;
5220 msg.rpc_argp = &data->args;
5221 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5222 return 0;
d3c7b7cc
TM		 5223}
5224
aa1870af
BF		 5225#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5226
64c2ce8b
AK		 5227static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5228 const void *buf, size_t buflen,
5229 int flags, int type)
6b3b5496 5230{
64c2ce8b
AK		 5231 if (strcmp(key, "") != 0)
5232 return -EINVAL;
4b580ee3 5233
64c2ce8b 5234 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5235}
5236
64c2ce8b
AK		 5237static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5238 void *buf, size_t buflen, int type)
6b3b5496 5239{
64c2ce8b
AK		 5240 if (strcmp(key, "") != 0)
5241 return -EINVAL;
aa1870af 5242
64c2ce8b 5243 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5244}
5245
64c2ce8b
AK		 5246static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5247 size_t list_len, const char *name,
5248 size_t name_len, int type)
6b3b5496 5249{
64c2ce8b 5250 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5251
096455a2
BF		 5252 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5253 return 0;
64c2ce8b
AK		 5254
5255 if (list && len <= list_len)
5256 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5257 return len;
6b3b5496
BF		 5258}
5259
533eb461
AA		 5260/*
5261 * nfs_fhget will use either the mounted_on_fileid or the fileid
5262 */
69aaaae1
TM		 5263static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5264{
533eb461
AA		 5265 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5266 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5267 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5268 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5269 return;
5270
5271 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5272 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5273 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5274 fattr->nlink = 2;
5275}
5276
f05d147f
BS		 5277static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5278 const struct qstr *name,
5279 struct nfs4_fs_locations *fs_locations,
5280 struct page *page)
683b57b4
TM		 5281{
5282 struct nfs_server *server = NFS_SERVER(dir);
5283 u32 bitmask[2] = {
361e624f 5284 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5285 };
5286 struct nfs4_fs_locations_arg args = {
5287 .dir_fh = NFS_FH(dir),
c228fd3a 5288 .name = name,
683b57b4
TM		 5289 .page = page,
5290 .bitmask = bitmask,
5291 };
22958463
BH		 5292 struct nfs4_fs_locations_res res = {
5293 .fs_locations = fs_locations,
5294 };
683b57b4
TM		 5295 struct rpc_message msg = {
5296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5297 .rpc_argp = &args,
22958463 5298 .rpc_resp = &res,
683b57b4
TM		 5299 };
5300 int status;
5301
3110ff80 5302 dprintk("%s: start\n", __func__);
533eb461
AA		 5303
5304 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5305 * is not supported */
5306 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5307 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5308 else
5309 bitmask[0] |= FATTR4_WORD0_FILEID;
5310
c228fd3a 5311 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5312 fs_locations->server = server;
830b8e33 5313 fs_locations->nlocations = 0;
f05d147f 5314 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5315 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5316 return status;
5317}
5318
f05d147f
BS		 5319int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5320 const struct qstr *name,
5321 struct nfs4_fs_locations *fs_locations,
5322 struct page *page)
db0a9593
BS		 5323{
5324 struct nfs4_exception exception = { };
5325 int err;
5326 do {
5327 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5328 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5329 &exception);
5330 } while (exception.retry);
5331 return err;
5332}
5333
5a5ea0d4
BS		 5334static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5335{
5336 int status;
5337 struct nfs4_secinfo_arg args = {
5338 .dir_fh = NFS_FH(dir),
5339 .name = name,
5340 };
5341 struct nfs4_secinfo_res res = {
5342 .flavors = flavors,
5343 };
5344 struct rpc_message msg = {
5345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5346 .rpc_argp = &args,
5347 .rpc_resp = &res,
5348 };
5349
5350 dprintk("NFS call secinfo %s\n", name->name);
5351 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5352 dprintk("NFS reply secinfo: %d\n", status);
5353 return status;
5354}
5355
72de53ec
BS		 5356int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5357 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5358{
5359 struct nfs4_exception exception = { };
5360 int err;
5361 do {
5362 err = nfs4_handle_exception(NFS_SERVER(dir),
5363 _nfs4_proc_secinfo(dir, name, flavors),
5364 &exception);
5365 } while (exception.retry);
5366 return err;
5367}
5368
557134a3 5369#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5370/*
5371 * Check the exchange flags returned by the server for invalid flags, having
5372 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5373 * DS flags set.
5374 */
5375static int nfs4_check_cl_exchange_flags(u32 flags)
5376{
5377 if (flags & ~EXCHGID4_FLAG_MASK_R)
5378 goto out_inval;
5379 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5380 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5381 goto out_inval;
5382 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5383 goto out_inval;
5384 return NFS_OK;
5385out_inval:
5386 return -NFS4ERR_INVAL;
5387}
5388
78fe0f41 5389static bool
79d4e1f0
CL		 5390nfs41_same_server_scope(struct nfs41_server_scope *a,
5391 struct nfs41_server_scope *b)
78fe0f41
WAA		 5392{
5393 if (a->server_scope_sz == b->server_scope_sz &&
5394 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5395 return true;
5396
5397 return false;
5398}
5399
7c44f1ae
WAA		 5400/*
5401 * nfs4_proc_bind_conn_to_session()
5402 *
5403 * The 4.1 client currently uses the same TCP connection for the
5404 * fore and backchannel.
5405 */
2cf047c9 5406int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5407{
5408 int status;
5409 struct nfs41_bind_conn_to_session_res res;
5410 struct rpc_message msg = {
5411 .rpc_proc =
5412 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5413 .rpc_argp = clp,
5414 .rpc_resp = &res,
2cf047c9 5415 .rpc_cred = cred,
7c44f1ae
WAA		 5416 };
5417
5418 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5419
5420 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5421 if (unlikely(res.session == NULL)) {
5422 status = -ENOMEM;
5423 goto out;
5424 }
5425
5426 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5427 if (status == 0) {
5428 if (memcmp(res.session->sess_id.data,
5429 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5430 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5431 status = -EIO;
5432 goto out_session;
5433 }
5434 if (res.dir != NFS4_CDFS4_BOTH) {
5435 dprintk("NFS: %s: Unexpected direction from server\n",
5436 __func__);
5437 status = -EIO;
5438 goto out_session;
5439 }
5440 if (res.use_conn_in_rdma_mode) {
5441 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5442 __func__);
5443 status = -EIO;
5444 goto out_session;
5445 }
5446 }
5447out_session:
5448 kfree(res.session);
5449out:
5450 dprintk("<-- %s status= %d\n", __func__, status);
5451 return status;
5452}
5453
99fe60d0
BH		 5454/*
5455 * nfs4_proc_exchange_id()
5456 *
6bbb4ae8
CL		 5457 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5458 *
99fe60d0
BH		 5459 * Since the clientid has expired, all compounds using sessions
5460 * associated with the stale clientid will be returning
5461 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5462 * be in some phase of session reset.
5463 */
4d643d1d 5464int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5465{
5466 nfs4_verifier verifier;
5467 struct nfs41_exchange_id_args args = {
cd93710e 5468 .verifier = &verifier,
99fe60d0 5469 .client = clp,
357f54d6 5470 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5471 };
5472 struct nfs41_exchange_id_res res = {
32b01310 5473 0
99fe60d0
BH		 5474 };
5475 int status;
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5478 .rpc_argp = &args,
5479 .rpc_resp = &res,
5480 .rpc_cred = cred,
5481 };
99fe60d0 5482
f092075d 5483 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5484 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5485 sizeof(args.id));
6bbb4ae8
CL		 5486 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5487 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5488 args.id_len, args.id);
99fe60d0 5489
acdeb69d 5490 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5491 GFP_NOFS);
acdeb69d 5492 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5493 status = -ENOMEM;
5494 goto out;
5495 }
78fe0f41 5496
79d4e1f0 5497 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5498 GFP_NOFS);
177313f1 5499 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5500 status = -ENOMEM;
acdeb69d 5501 goto out_server_owner;
abe9a6d5 5502 }
78fe0f41 5503
bbafffd2 5504 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5505 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5506 status = -ENOMEM;
5507 goto out_server_scope;
5508 }
5509
1bd714f2 5510 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5511 if (status == 0)
32b01310 5512 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5513
acdeb69d 5514 if (status == 0) {
32b01310
TM		 5515 clp->cl_clientid = res.clientid;
5516 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5517 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5518 clp->cl_seqid = res.seqid;
5519
acdeb69d
CL		 5520 kfree(clp->cl_serverowner);
5521 clp->cl_serverowner = res.server_owner;
5522 res.server_owner = NULL;
78fe0f41 5523
7d2ed9ac 5524 /* use the most recent implementation id */
59155546
CL		 5525 kfree(clp->cl_implid);
5526 clp->cl_implid = res.impl_id;
7d2ed9ac 5527
177313f1 5528 if (clp->cl_serverscope != NULL &&
79d4e1f0 5529 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5530 res.server_scope)) {
5531 dprintk("%s: server_scope mismatch detected\n",
5532 __func__);
5533 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5534 kfree(clp->cl_serverscope);
5535 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5536 }
5537
177313f1 5538 if (clp->cl_serverscope == NULL) {
79d4e1f0 5539 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5540 goto out;
5541 }
32b01310
TM		 5542 } else
5543 kfree(res.impl_id);
7d2ed9ac 5544
acdeb69d
CL		 5545out_server_owner:
5546 kfree(res.server_owner);
7d2ed9ac 5547out_server_scope:
abe9a6d5
WAA		 5548 kfree(res.server_scope);
5549out:
177313f1 5550 if (clp->cl_implid != NULL)
6bbb4ae8 5551 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5552 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5553 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5554 clp->cl_implid->date.seconds,
5555 clp->cl_implid->date.nseconds);
6bbb4ae8 5556 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5557 return status;
5558}
5559
66245539
TM		 5560static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5561 struct rpc_cred *cred)
5562{
5563 struct rpc_message msg = {
5564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5565 .rpc_argp = clp,
5566 .rpc_cred = cred,
5567 };
5568 int status;
5569
5570 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5571 if (status)
02c67525 5572 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5573 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5574 return status;
5575}
5576
5577static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5578 struct rpc_cred *cred)
5579{
5580 unsigned int loop;
5581 int ret;
5582
5583 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5584 ret = _nfs4_proc_destroy_clientid(clp, cred);
5585 switch (ret) {
5586 case -NFS4ERR_DELAY:
5587 case -NFS4ERR_CLIENTID_BUSY:
5588 ssleep(1);
5589 break;
5590 default:
5591 return ret;
5592 }
5593 }
5594 return 0;
5595}
5596
5597int nfs4_destroy_clientid(struct nfs_client *clp)
5598{
5599 struct rpc_cred *cred;
5600 int ret = 0;
5601
5602 if (clp->cl_mvops->minor_version < 1)
5603 goto out;
5604 if (clp->cl_exchange_flags == 0)
5605 goto out;
05f4c350
CL		 5606 if (clp->cl_preserve_clid)
5607 goto out;
66245539
TM		 5608 cred = nfs4_get_exchange_id_cred(clp);
5609 ret = nfs4_proc_destroy_clientid(clp, cred);
5610 if (cred)
5611 put_rpccred(cred);
5612 switch (ret) {
5613 case 0:
5614 case -NFS4ERR_STALE_CLIENTID:
5615 clp->cl_exchange_flags = 0;
5616 }
5617out:
5618 return ret;
5619}
5620
2050f0cc
AA		 5621struct nfs4_get_lease_time_data {
5622 struct nfs4_get_lease_time_args *args;
5623 struct nfs4_get_lease_time_res *res;
5624 struct nfs_client *clp;
5625};
5626
5627static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5628 void *calldata)
5629{
5630 int ret;
5631 struct nfs4_get_lease_time_data *data =
5632 (struct nfs4_get_lease_time_data *)calldata;
5633
5634 dprintk("--> %s\n", __func__);
689cf5c1 5635 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5636 /* just setup sequence, do not trigger session recovery
5637 since we're invoked within one */
5638 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5639 &data->args->la_seq_args,
9d12b216 5640 &data->res->lr_seq_res, task);
2050f0cc 5641
d3edcf96
TM		 5642 if (ret != -EAGAIN)
5643 rpc_call_start(task);
2050f0cc
AA		 5644 dprintk("<-- %s\n", __func__);
5645}
5646
5647/*
5648 * Called from nfs4_state_manager thread for session setup, so don't recover
5649 * from sequence operation or clientid errors.
5650 */
5651static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5652{
5653 struct nfs4_get_lease_time_data *data =
5654 (struct nfs4_get_lease_time_data *)calldata;
5655
5656 dprintk("--> %s\n", __func__);
14516c3a
TM		 5657 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5658 return;
2050f0cc
AA		 5659 switch (task->tk_status) {
5660 case -NFS4ERR_DELAY:
5661 case -NFS4ERR_GRACE:
5662 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5663 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5664 task->tk_status = 0;
a8a4ae3a
AA		 5665 /* fall through */
5666 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5667 rpc_restart_call_prepare(task);
2050f0cc
AA		 5668 return;
5669 }
2050f0cc
AA		 5670 dprintk("<-- %s\n", __func__);
5671}
5672
17280175 5673static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5674 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5675 .rpc_call_done = nfs4_get_lease_time_done,
5676};
5677
5678int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5679{
5680 struct rpc_task *task;
5681 struct nfs4_get_lease_time_args args;
5682 struct nfs4_get_lease_time_res res = {
5683 .lr_fsinfo = fsinfo,
5684 };
5685 struct nfs4_get_lease_time_data data = {
5686 .args = &args,
5687 .res = &res,
5688 .clp = clp,
5689 };
5690 struct rpc_message msg = {
5691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5692 .rpc_argp = &args,
5693 .rpc_resp = &res,
5694 };
5695 struct rpc_task_setup task_setup = {
5696 .rpc_client = clp->cl_rpcclient,
5697 .rpc_message = &msg,
5698 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5699 .callback_data = &data,
5700 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5701 };
5702 int status;
5703
9d12b216 5704 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5705 dprintk("--> %s\n", __func__);
5706 task = rpc_run_task(&task_setup);
5707
5708 if (IS_ERR(task))
5709 status = PTR_ERR(task);
5710 else {
5711 status = task->tk_status;
5712 rpc_put_task(task);
5713 }
5714 dprintk("<-- %s return %d\n", __func__, status);
5715
5716 return status;
5717}
5718
87dda67e
TM		 5719static int nfs4_grow_slot_table(struct nfs4_slot_table *tbl,
5720 u32 max_reqs, u32 ivalue)
f86f36a6 5721{
87dda67e
TM		 5722 if (max_reqs <= tbl->max_slots)
5723 return 0;
69d206b5 5724 if (!IS_ERR(nfs4_find_or_create_slot(tbl, max_reqs - 1, ivalue, GFP_NOFS)))
87dda67e
TM		 5725 return 0;
5726 return -ENOMEM;
f86f36a6
TM		 5727}
5728
87dda67e
TM		 5729static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl,
5730 u32 server_highest_slotid,
f86f36a6
TM		 5731 u32 ivalue)
5732{
87dda67e 5733 struct nfs4_slot **p;
f86f36a6 5734
87dda67e
TM		 5735 nfs4_shrink_slot_table(tbl, server_highest_slotid + 1);
5736 p = &tbl->slots;
5737 while (*p) {
5738 (*p)->seq_nr = ivalue;
5739 p = &(*p)->next;
f86f36a6 5740 }
f9b1ef5f 5741 tbl->highest_used_slotid = NFS4_NO_SLOT;
87dda67e
TM		 5742 tbl->target_highest_slotid = server_highest_slotid;
5743 tbl->server_highest_slotid = server_highest_slotid;
5744 tbl->max_slotid = server_highest_slotid;
f86f36a6
TM		 5745}
5746
b73dafa7 5747/*
f86f36a6 5748 * (re)Initialise a slot table
b73dafa7 5749 */
87dda67e
TM		 5750static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl,
5751 u32 max_reqs, u32 ivalue)
ac72b7b3 5752{
87dda67e 5753 int ret;
ac72b7b3 5754
104aeba4
AA		 5755 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5756 max_reqs, tbl->max_slots);
ac72b7b3 5757
87dda67e
TM		 5758 if (max_reqs > NFS4_MAX_SLOT_TABLE)
5759 max_reqs = NFS4_MAX_SLOT_TABLE;
5760
5761 ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue);
5762 if (ret)
5763 goto out;
5764
5765 spin_lock(&tbl->slot_tbl_lock);
5766 nfs4_reset_slot_table(tbl, max_reqs - 1, ivalue);
5767 spin_unlock(&tbl->slot_tbl_lock);
f86f36a6 5768
ac72b7b3
AA		 5769 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5770 tbl, tbl->slots, tbl->max_slots);
5771out:
5772 dprintk("<-- %s: return %d\n", __func__, ret);
5773 return ret;
5774}
5775
f8625a6a
RL		 5776/* Destroy the slot table */
5777static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5778{
87dda67e
TM		 5779 nfs4_shrink_slot_table(&session->fc_slot_table, 0);
5780 nfs4_shrink_slot_table(&session->bc_slot_table, 0);
f8625a6a
RL		 5781}
5782
050047ce 5783/*
aacd5537 5784 * Initialize or reset the forechannel and backchannel tables
050047ce 5785 */
aacd5537 5786static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5787{
f26468fb 5788 struct nfs4_slot_table *tbl;
aacd5537 5789 int status;
050047ce 5790
aacd5537
AA		 5791 dprintk("--> %s\n", __func__);
5792 /* Fore channel */
5793 tbl = &ses->fc_slot_table;
e3725ec0 5794 tbl->session = ses;
f86f36a6
TM		 5795 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5796 if (status) /* -ENOMEM */
5797 return status;
aacd5537
AA		 5798 /* Back channel */
5799 tbl = &ses->bc_slot_table;
e3725ec0 5800 tbl->session = ses;
f86f36a6
TM		 5801 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5802 if (status && tbl->slots == NULL)
5803 /* Fore and back channel share a connection so get
5804 * both slot tables or neither */
5805 nfs4_destroy_slot_tables(ses);
f8625a6a 5806 return status;
557134a3
AA		 5807}
5808
5809struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5810{
5811 struct nfs4_session *session;
5812 struct nfs4_slot_table *tbl;
5813
8535b2be 5814 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5815 if (!session)
5816 return NULL;
76db6d95 5817
557134a3 5818 tbl = &session->fc_slot_table;
45d43c29 5819 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5820 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5821 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5822 init_completion(&tbl->complete);
f8625a6a
RL		 5823
5824 tbl = &session->bc_slot_table;
45d43c29 5825 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5826 spin_lock_init(&tbl->slot_tbl_lock);
5827 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5828 init_completion(&tbl->complete);
f8625a6a 5829
1055d76d
TM		 5830 session->session_state = 1<<NFS4_SESSION_INITING;
5831
557134a3
AA		 5832 session->clp = clp;
5833 return session;
5834}
5835
5836void nfs4_destroy_session(struct nfs4_session *session)
5837{
2446ab60 5838 struct rpc_xprt *xprt;
848f5bda 5839 struct rpc_cred *cred;
2446ab60 5840
848f5bda
TM		 5841 cred = nfs4_get_exchange_id_cred(session->clp);
5842 nfs4_proc_destroy_session(session, cred);
5843 if (cred)
5844 put_rpccred(cred);
2446ab60
TM		 5845
5846 rcu_read_lock();
5847 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5848 rcu_read_unlock();
5a0ffe54 5849 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5850 __func__, xprt);
5851 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5852 nfs4_destroy_slot_tables(session);
557134a3
AA		 5853 kfree(session);
5854}
5855
fc931582
AA		 5856/*
5857 * Initialize the values to be used by the client in CREATE_SESSION
5858 * If nfs4_init_session set the fore channel request and response sizes,
5859 * use them.
5860 *
5861 * Set the back channel max_resp_sz_cached to zero to force the client to
5862 * always set csa_cachethis to FALSE because the current implementation
5863 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5864 */
5865static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5866{
5867 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5868 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5869 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5870
5871 if (mxrqst_sz == 0)
5872 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5873 if (mxresp_sz == 0)
5874 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5875 /* Fore channel attributes */
fc931582
AA		 5876 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5877 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5878 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5879 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5880
5881 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5882 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5883 __func__,
5884 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5885 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5886
5887 /* Back channel attributes */
fc931582
AA		 5888 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5889 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5890 args->bc_attrs.max_resp_sz_cached = 0;
5891 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5892 args->bc_attrs.max_reqs = 1;
5893
5894 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5895 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5896 __func__,
5897 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5898 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5899 args->bc_attrs.max_reqs);
5900}
5901
43c2e885 5902static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5903{
43c2e885
BF		 5904 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5905 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5906
43c2e885
BF		 5907 if (rcvd->max_resp_sz > sent->max_resp_sz)
5908 return -EINVAL;
5909 /*
5910 * Our requested max_ops is the minimum we need; we're not
5911 * prepared to break up compounds into smaller pieces than that.
5912 * So, no point even trying to continue if the server won't
5913 * cooperate:
5914 */
5915 if (rcvd->max_ops < sent->max_ops)
5916 return -EINVAL;
5917 if (rcvd->max_reqs == 0)
5918 return -EINVAL;
b4b9a0c1
VG		 5919 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5920 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5921 return 0;
8d35301d
AA		 5922}
5923
43c2e885
BF		 5924static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5925{
5926 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5927 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5928
43c2e885
BF		 5929 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5930 return -EINVAL;
5931 if (rcvd->max_resp_sz < sent->max_resp_sz)
5932 return -EINVAL;
5933 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5934 return -EINVAL;
5935 /* These would render the backchannel useless: */
b4b9a0c1 5936 if (rcvd->max_ops != sent->max_ops)
43c2e885 5937 return -EINVAL;
b4b9a0c1 5938 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5939 return -EINVAL;
5940 return 0;
5941}
8d35301d 5942
8d35301d
AA		 5943static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5944 struct nfs4_session *session)
5945{
43c2e885 5946 int ret;
8d35301d 5947
43c2e885
BF		 5948 ret = nfs4_verify_fore_channel_attrs(args, session);
5949 if (ret)
5950 return ret;
5951 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5952}
5953
848f5bda
TM		 5954static int _nfs4_proc_create_session(struct nfs_client *clp,
5955 struct rpc_cred *cred)
fc931582
AA		 5956{
5957 struct nfs4_session *session = clp->cl_session;
5958 struct nfs41_create_session_args args = {
5959 .client = clp,
5960 .cb_program = NFS4_CALLBACK,
5961 };
5962 struct nfs41_create_session_res res = {
5963 .client = clp,
5964 };
5965 struct rpc_message msg = {
5966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5967 .rpc_argp = &args,
5968 .rpc_resp = &res,
848f5bda 5969 .rpc_cred = cred,
fc931582
AA		 5970 };
5971 int status;
5972
5973 nfs4_init_channel_attrs(&args);
0f91421e 5974 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5975
1bd714f2 5976 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5977
43095d39 5978 if (!status) {
8d35301d
AA		 5979 /* Verify the session's negotiated channel_attrs values */
5980 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5981 /* Increment the clientid slot sequence id */
5982 clp->cl_seqid++;
5983 }
5984
5985 return status;
5986}
5987
5988/*
5989 * Issues a CREATE_SESSION operation to the server.
5990 * It is the responsibility of the caller to verify the session is
5991 * expired before calling this routine.
5992 */
848f5bda 5993int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5994{
5995 int status;
5996 unsigned *ptr;
fc931582
AA		 5997 struct nfs4_session *session = clp->cl_session;
5998
5999 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6000
848f5bda 6001 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6002 if (status)
6003 goto out;
6004
aacd5537
AA		 6005 /* Init or reset the session slot tables */
6006 status = nfs4_setup_session_slot_tables(session);
6007 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6008 if (status)
6009 goto out;
6010
6011 ptr = (unsigned *)&session->sess_id.data[0];
6012 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6013 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6014out:
6015 dprintk("<-- %s\n", __func__);
6016 return status;
6017}
6018
0f3e66c6
AA		 6019/*
6020 * Issue the over-the-wire RPC DESTROY_SESSION.
6021 * The caller must serialize access to this routine.
6022 */
848f5bda
TM		 6023int nfs4_proc_destroy_session(struct nfs4_session *session,
6024 struct rpc_cred *cred)
0f3e66c6 6025{
848f5bda
TM		 6026 struct rpc_message msg = {
6027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6028 .rpc_argp = session,
6029 .rpc_cred = cred,
6030 };
0f3e66c6 6031 int status = 0;
0f3e66c6
AA		 6032
6033 dprintk("--> nfs4_proc_destroy_session\n");
6034
6035 /* session is still being setup */
6036 if (session->clp->cl_cons_state != NFS_CS_READY)
6037 return status;
6038
1bd714f2 6039 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 6040
6041 if (status)
08106ac7 6042 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6043 "Session has been destroyed regardless...\n", status);
6044
6045 dprintk("<-- nfs4_proc_destroy_session\n");
6046 return status;
6047}
6048
7b38c368
TM		 6049/*
6050 * With sessions, the client is not marked ready until after a
6051 * successful EXCHANGE_ID and CREATE_SESSION.
6052 *
6053 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6054 * other versions of NFS can be tried.
6055 */
6056static int nfs41_check_session_ready(struct nfs_client *clp)
6057{
6058 int ret;
6059
6060 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6061 ret = nfs4_client_recover_expired_lease(clp);
6062 if (ret)
6063 return ret;
6064 }
6065 if (clp->cl_cons_state < NFS_CS_READY)
6066 return -EPROTONOSUPPORT;
54ac471c 6067 smp_rmb();
7b38c368
TM		 6068 return 0;
6069}
6070
fccba804
TM		 6071int nfs4_init_session(struct nfs_server *server)
6072{
6073 struct nfs_client *clp = server->nfs_client;
2449ea2e 6074 struct nfs4_session *session;
ae72ae67
TM		 6075 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6076 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
fccba804
TM		 6077
6078 if (!nfs4_has_session(clp))
6079 return 0;
6080
ae72ae67
TM		 6081 if (server->rsize != 0)
6082 target_max_resp_sz = server->rsize;
6083 target_max_resp_sz += nfs41_maxread_overhead;
6084
6085 if (server->wsize != 0)
6086 target_max_rqst_sz = server->wsize;
6087 target_max_rqst_sz += nfs41_maxwrite_overhead;
6088
1055d76d 6089 session = clp->cl_session;
7b38c368
TM		 6090 spin_lock(&clp->cl_lock);
6091 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
ae72ae67
TM		 6092 /* Initialise targets and channel attributes */
6093 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6094 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6095 session->fc_target_max_resp_sz = target_max_resp_sz;
6096 session->fc_attrs.max_resp_sz = target_max_resp_sz;
688a9024
TM		 6097 } else {
6098 /* Just adjust the targets */
6099 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6100 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6101 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6102 }
6103 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6104 session->fc_target_max_resp_sz = target_max_resp_sz;
6105 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6106 }
7b38c368
TM		 6107 }
6108 spin_unlock(&clp->cl_lock);
2449ea2e 6109
688a9024
TM		 6110 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6111 nfs4_schedule_lease_recovery(clp);
6112
7b38c368 6113 return nfs41_check_session_ready(clp);
fccba804
TM		 6114}
6115
7b38c368 6116int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 6117{
6118 struct nfs4_session *session = clp->cl_session;
6119 int ret;
6120
7b38c368
TM		 6121 spin_lock(&clp->cl_lock);
6122 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6123 /*
6124 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6125 * DS lease to be equal to the MDS lease.
6126 */
6127 clp->cl_lease_time = lease_time;
6128 clp->cl_last_renewal = jiffies;
6129 }
6130 spin_unlock(&clp->cl_lock);
d83217c1 6131
7b38c368
TM		 6132 ret = nfs41_check_session_ready(clp);
6133 if (ret)
6134 return ret;
6135 /* Test for the DS role */
6136 if (!is_ds_client(clp))
6137 return -ENODEV;
6138 return 0;
d83217c1
AA		 6139}
6140EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6141
6142
fc01cea9
AA		 6143/*
6144 * Renew the cl_session lease.
6145 */
d5f8d3fe
TM		 6146struct nfs4_sequence_data {
6147 struct nfs_client *clp;
6148 struct nfs4_sequence_args args;
6149 struct nfs4_sequence_res res;
6150};
6151
dc96aef9
AB		 6152static void nfs41_sequence_release(void *data)
6153{
d5f8d3fe
TM		 6154 struct nfs4_sequence_data *calldata = data;
6155 struct nfs_client *clp = calldata->clp;
dc96aef9 6156
7135840f
AB		 6157 if (atomic_read(&clp->cl_count) > 1)
6158 nfs4_schedule_state_renewal(clp);
6159 nfs_put_client(clp);
d5f8d3fe 6160 kfree(calldata);
dc96aef9
AB		 6161}
6162
aa5190d0
TM		 6163static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6164{
6165 switch(task->tk_status) {
6166 case -NFS4ERR_DELAY:
aa5190d0
TM		 6167 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6168 return -EAGAIN;
6169 default:
0400a6b0 6170 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6171 }
6172 return 0;
6173}
6174
dc96aef9 6175static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6176{
d5f8d3fe
TM		 6177 struct nfs4_sequence_data *calldata = data;
6178 struct nfs_client *clp = calldata->clp;
fc01cea9 6179
14516c3a
TM		 6180 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6181 return;
fc01cea9
AA		 6182
6183 if (task->tk_status < 0) {
6184 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6185 if (atomic_read(&clp->cl_count) == 1)
6186 goto out;
fc01cea9 6187
aa5190d0
TM		 6188 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6189 rpc_restart_call_prepare(task);
fc01cea9
AA		 6190 return;
6191 }
6192 }
fc01cea9 6193 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6194out:
fc01cea9
AA		 6195 dprintk("<-- %s\n", __func__);
6196}
6197
6198static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6199{
d5f8d3fe
TM		 6200 struct nfs4_sequence_data *calldata = data;
6201 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6202 struct nfs4_sequence_args *args;
6203 struct nfs4_sequence_res *res;
6204
fc01cea9
AA		 6205 args = task->tk_msg.rpc_argp;
6206 res = task->tk_msg.rpc_resp;
6207
9d12b216 6208 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6209 return;
6210 rpc_call_start(task);
6211}
6212
6bdb5f21
BS		 6213static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6214{
6215 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6216 nfs41_sequence_prepare(task, data);
6217}
6218
fc01cea9
AA		 6219static const struct rpc_call_ops nfs41_sequence_ops = {
6220 .rpc_call_done = nfs41_sequence_call_done,
6221 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6222 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6223};
6224
6bdb5f21
BS		 6225static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6226 .rpc_call_done = nfs41_sequence_call_done,
6227 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6228 .rpc_release = nfs41_sequence_release,
6229};
6230
6231static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6232 const struct rpc_call_ops *seq_ops)
fc01cea9 6233{
d5f8d3fe 6234 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6237 .rpc_cred = cred,
6238 };
71ac6da9
TM		 6239 struct rpc_task_setup task_setup_data = {
6240 .rpc_client = clp->cl_rpcclient,
6241 .rpc_message = &msg,
6bdb5f21 6242 .callback_ops = seq_ops,
71ac6da9
TM		 6243 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6244 };
fc01cea9 6245
7135840f 6246 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6247 return ERR_PTR(-EIO);
dfb4f309 6248 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6249 if (calldata == NULL) {
7135840f 6250 nfs_put_client(clp);
71ac6da9 6251 return ERR_PTR(-ENOMEM);
fc01cea9 6252 }
9d12b216 6253 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6254 msg.rpc_argp = &calldata->args;
6255 msg.rpc_resp = &calldata->res;
6256 calldata->clp = clp;
71ac6da9 6257 task_setup_data.callback_data = calldata;
fc01cea9 6258
71ac6da9
TM		 6259 return rpc_run_task(&task_setup_data);
6260}
6261
2f60ea6b 6262static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6263{
6264 struct rpc_task *task;
6265 int ret = 0;
6266
2f60ea6b
TM		 6267 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6268 return 0;
6bdb5f21 6269 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
71ac6da9
TM		 6270 if (IS_ERR(task))
6271 ret = PTR_ERR(task);
6272 else
bf294b41 6273 rpc_put_task_async(task);
71ac6da9
TM		 6274 dprintk("<-- %s status=%d\n", __func__, ret);
6275 return ret;
6276}
6277
6278static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6279{
6280 struct rpc_task *task;
6281 int ret;
6282
6bdb5f21 6283 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
71ac6da9
TM		 6284 if (IS_ERR(task)) {
6285 ret = PTR_ERR(task);
6286 goto out;
6287 }
6288 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6289 if (!ret) {
6290 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6291
6292 if (task->tk_status == 0)
6293 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6294 ret = task->tk_status;
b4410c2f 6295 }
71ac6da9
TM		 6296 rpc_put_task(task);
6297out:
6298 dprintk("<-- %s status=%d\n", __func__, ret);
6299 return ret;
fc01cea9
AA		 6300}
6301
fce5c838
RL		 6302struct nfs4_reclaim_complete_data {
6303 struct nfs_client *clp;
6304 struct nfs41_reclaim_complete_args arg;
6305 struct nfs41_reclaim_complete_res res;
6306};
6307
6308static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6309{
6310 struct nfs4_reclaim_complete_data *calldata = data;
6311
b257957e 6312 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6313 if (nfs41_setup_sequence(calldata->clp->cl_session,
6314 &calldata->arg.seq_args,
9d12b216 6315 &calldata->res.seq_res, task))
fce5c838
RL		 6316 return;
6317
6318 rpc_call_start(task);
6319}
6320
aa5190d0
TM		 6321static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6322{
6323 switch(task->tk_status) {
6324 case 0:
6325 case -NFS4ERR_COMPLETE_ALREADY:
6326 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6327 break;
6328 case -NFS4ERR_DELAY:
aa5190d0 6329 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6330 /* fall through */
6331 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6332 return -EAGAIN;
6333 default:
0400a6b0 6334 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6335 }
6336 return 0;
6337}
6338
fce5c838
RL		 6339static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6340{
6341 struct nfs4_reclaim_complete_data *calldata = data;
6342 struct nfs_client *clp = calldata->clp;
6343 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6344
6345 dprintk("--> %s\n", __func__);
14516c3a
TM		 6346 if (!nfs41_sequence_done(task, res))
6347 return;
fce5c838 6348
aa5190d0
TM		 6349 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6350 rpc_restart_call_prepare(task);
6351 return;
6352 }
fce5c838
RL		 6353 dprintk("<-- %s\n", __func__);
6354}
6355
6356static void nfs4_free_reclaim_complete_data(void *data)
6357{
6358 struct nfs4_reclaim_complete_data *calldata = data;
6359
6360 kfree(calldata);
6361}
6362
6363static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6364 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6365 .rpc_call_done = nfs4_reclaim_complete_done,
6366 .rpc_release = nfs4_free_reclaim_complete_data,
6367};
6368
6369/*
6370 * Issue a global reclaim complete.
6371 */
6372static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6373{
6374 struct nfs4_reclaim_complete_data *calldata;
6375 struct rpc_task *task;
6376 struct rpc_message msg = {
6377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6378 };
6379 struct rpc_task_setup task_setup_data = {
6380 .rpc_client = clp->cl_rpcclient,
6381 .rpc_message = &msg,
6382 .callback_ops = &nfs4_reclaim_complete_call_ops,
6383 .flags = RPC_TASK_ASYNC,
6384 };
6385 int status = -ENOMEM;
6386
6387 dprintk("--> %s\n", __func__);
8535b2be 6388 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6389 if (calldata == NULL)
6390 goto out;
6391 calldata->clp = clp;
6392 calldata->arg.one_fs = 0;
fce5c838 6393
9d12b216 6394 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6395 msg.rpc_argp = &calldata->arg;
6396 msg.rpc_resp = &calldata->res;
6397 task_setup_data.callback_data = calldata;
6398 task = rpc_run_task(&task_setup_data);
acf82b85 6399 if (IS_ERR(task)) {
fce5c838 6400 status = PTR_ERR(task);
acf82b85
DC		 6401 goto out;
6402 }
c34c32ea
AA		 6403 status = nfs4_wait_for_completion_rpc_task(task);
6404 if (status == 0)
6405 status = task->tk_status;
fce5c838 6406 rpc_put_task(task);
acf82b85 6407 return 0;
fce5c838
RL		 6408out:
6409 dprintk("<-- %s status=%d\n", __func__, status);
6410 return status;
6411}
b1f69b75
AA		 6412
6413static void
6414nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6415{
6416 struct nfs4_layoutget *lgp = calldata;
c31663d4 6417 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6418
6419 dprintk("--> %s\n", __func__);
c31663d4
FI		 6420 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6421 * right now covering the LAYOUTGET we are about to send.
6422 * However, that is not so catastrophic, and there seems
6423 * to be no way to prevent it completely.
6424 */
b1f69b75 6425 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6426 &lgp->res.seq_res, task))
b1f69b75 6427 return;
cf7d63f1
FI		 6428 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6429 NFS_I(lgp->args.inode)->layout,
6430 lgp->args.ctx->state)) {
6431 rpc_exit(task, NFS4_OK);
6432 return;
6433 }
b1f69b75
AA		 6434 rpc_call_start(task);
6435}
6436
6437static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6438{
6439 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6440 struct inode *inode = lgp->args.inode;
6441 struct nfs_server *server = NFS_SERVER(inode);
6442 struct pnfs_layout_hdr *lo;
6443 struct nfs4_state *state = NULL;
b1f69b75
AA		 6444
6445 dprintk("--> %s\n", __func__);
6446
6447 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6448 goto out;
b1f69b75
AA		 6449
6450 switch (task->tk_status) {
6451 case 0:
ee314c2a 6452 goto out;
b1f69b75
AA		 6453 case -NFS4ERR_LAYOUTTRYLATER:
6454 case -NFS4ERR_RECALLCONFLICT:
6455 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6456 break;
6457 case -NFS4ERR_EXPIRED:
6458 case -NFS4ERR_BAD_STATEID:
6459 spin_lock(&inode->i_lock);
6460 lo = NFS_I(inode)->layout;
6461 if (!lo || list_empty(&lo->plh_segs)) {
6462 spin_unlock(&inode->i_lock);
6463 /* If the open stateid was bad, then recover it. */
6464 state = lgp->args.ctx->state;
6465 } else {
6466 LIST_HEAD(head);
6467
6468 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6469 spin_unlock(&inode->i_lock);
6470 /* Mark the bad layout state as invalid, then
6471 * retry using the open stateid. */
6472 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6473 }
6474 }
ee314c2a
TM		 6475 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6476 rpc_restart_call_prepare(task);
6477out:
b1f69b75
AA		 6478 dprintk("<-- %s\n", __func__);
6479}
6480
8554116e
IK		 6481static size_t max_response_pages(struct nfs_server *server)
6482{
6483 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6484 return nfs_page_array_len(0, max_resp_sz);
6485}
6486
6487static void nfs4_free_pages(struct page **pages, size_t size)
6488{
6489 int i;
6490
6491 if (!pages)
6492 return;
6493
6494 for (i = 0; i < size; i++) {
6495 if (!pages[i])
6496 break;
6497 __free_page(pages[i]);
6498 }
6499 kfree(pages);
6500}
6501
6502static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6503{
6504 struct page **pages;
6505 int i;
6506
6507 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6508 if (!pages) {
6509 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6510 return NULL;
6511 }
6512
6513 for (i = 0; i < size; i++) {
6514 pages[i] = alloc_page(gfp_flags);
6515 if (!pages[i]) {
6516 dprintk("%s: failed to allocate page\n", __func__);
6517 nfs4_free_pages(pages, size);
6518 return NULL;
6519 }
6520 }
6521
6522 return pages;
6523}
6524
b1f69b75
AA		 6525static void nfs4_layoutget_release(void *calldata)
6526{
6527 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6528 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6529 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6530
6531 dprintk("--> %s\n", __func__);
8554116e 6532 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6533 put_nfs_open_context(lgp->args.ctx);
6534 kfree(calldata);
6535 dprintk("<-- %s\n", __func__);
6536}
6537
6538static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6539 .rpc_call_prepare = nfs4_layoutget_prepare,
6540 .rpc_call_done = nfs4_layoutget_done,
6541 .rpc_release = nfs4_layoutget_release,
6542};
6543
a0b0a6e3
TM		 6544struct pnfs_layout_segment *
6545nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6546{
6547 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6548 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6549 struct rpc_task *task;
6550 struct rpc_message msg = {
6551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6552 .rpc_argp = &lgp->args,
6553 .rpc_resp = &lgp->res,
6554 };
6555 struct rpc_task_setup task_setup_data = {
6556 .rpc_client = server->client,
6557 .rpc_message = &msg,
6558 .callback_ops = &nfs4_layoutget_call_ops,
6559 .callback_data = lgp,
6560 .flags = RPC_TASK_ASYNC,
6561 };
a0b0a6e3 6562 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6563 int status = 0;
6564
6565 dprintk("--> %s\n", __func__);
6566
8554116e
IK		 6567 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6568 if (!lgp->args.layout.pages) {
6569 nfs4_layoutget_release(lgp);
a0b0a6e3 6570 return ERR_PTR(-ENOMEM);
8554116e
IK		 6571 }
6572 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6573
35124a09 6574 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6575 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6576 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6577 task = rpc_run_task(&task_setup_data);
6578 if (IS_ERR(task))
a0b0a6e3 6579 return ERR_CAST(task);
b1f69b75 6580 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6581 if (status == 0)
6582 status = task->tk_status;
6583 if (status == 0)
a0b0a6e3 6584 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6585 rpc_put_task(task);
6586 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6587 if (status)
6588 return ERR_PTR(status);
6589 return lseg;
b1f69b75
AA		 6590}
6591
cbe82603
BH		 6592static void
6593nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6594{
6595 struct nfs4_layoutreturn *lrp = calldata;
6596
6597 dprintk("--> %s\n", __func__);
6598 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6599 &lrp->res.seq_res, task))
cbe82603
BH		 6600 return;
6601 rpc_call_start(task);
6602}
6603
6604static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6605{
6606 struct nfs4_layoutreturn *lrp = calldata;
6607 struct nfs_server *server;
6608
6609 dprintk("--> %s\n", __func__);
6610
6611 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6612 return;
6613
6614 server = NFS_SERVER(lrp->args.inode);
6615 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6616 rpc_restart_call_prepare(task);
cbe82603
BH		 6617 return;
6618 }
cbe82603
BH		 6619 dprintk("<-- %s\n", __func__);
6620}
6621
6622static void nfs4_layoutreturn_release(void *calldata)
6623{
6624 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6625 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6626
6627 dprintk("--> %s\n", __func__);
849b286f
TM		 6628 spin_lock(&lo->plh_inode->i_lock);
6629 if (lrp->res.lrs_present)
6630 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6631 lo->plh_block_lgets--;
6632 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6633 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6634 kfree(calldata);
6635 dprintk("<-- %s\n", __func__);
6636}
6637
6638static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6639 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6640 .rpc_call_done = nfs4_layoutreturn_done,
6641 .rpc_release = nfs4_layoutreturn_release,
6642};
6643
6644int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6645{
6646 struct rpc_task *task;
6647 struct rpc_message msg = {
6648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6649 .rpc_argp = &lrp->args,
6650 .rpc_resp = &lrp->res,
6651 };
6652 struct rpc_task_setup task_setup_data = {
6653 .rpc_client = lrp->clp->cl_rpcclient,
6654 .rpc_message = &msg,
6655 .callback_ops = &nfs4_layoutreturn_call_ops,
6656 .callback_data = lrp,
6657 };
6658 int status;
6659
6660 dprintk("--> %s\n", __func__);
9d12b216 6661 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6662 task = rpc_run_task(&task_setup_data);
6663 if (IS_ERR(task))
6664 return PTR_ERR(task);
6665 status = task->tk_status;
6666 dprintk("<-- %s status=%d\n", __func__, status);
6667 rpc_put_task(task);
6668 return status;
6669}
6670
7f11d8d3
AA		 6671/*
6672 * Retrieve the list of Data Server devices from the MDS.
6673 */
6674static int _nfs4_getdevicelist(struct nfs_server *server,
6675 const struct nfs_fh *fh,
6676 struct pnfs_devicelist *devlist)
6677{
6678 struct nfs4_getdevicelist_args args = {
6679 .fh = fh,
6680 .layoutclass = server->pnfs_curr_ld->id,
6681 };
6682 struct nfs4_getdevicelist_res res = {
6683 .devlist = devlist,
6684 };
6685 struct rpc_message msg = {
6686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6687 .rpc_argp = &args,
6688 .rpc_resp = &res,
6689 };
6690 int status;
6691
6692 dprintk("--> %s\n", __func__);
6693 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6694 &res.seq_res, 0);
6695 dprintk("<-- %s status=%d\n", __func__, status);
6696 return status;
6697}
6698
6699int nfs4_proc_getdevicelist(struct nfs_server *server,
6700 const struct nfs_fh *fh,
6701 struct pnfs_devicelist *devlist)
6702{
6703 struct nfs4_exception exception = { };
6704 int err;
6705
6706 do {
6707 err = nfs4_handle_exception(server,
6708 _nfs4_getdevicelist(server, fh, devlist),
6709 &exception);
6710 } while (exception.retry);
6711
6712 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6713 err, devlist->num_devs);
6714
6715 return err;
6716}
6717EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6718
b1f69b75
AA		 6719static int
6720_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6721{
6722 struct nfs4_getdeviceinfo_args args = {
6723 .pdev = pdev,
6724 };
6725 struct nfs4_getdeviceinfo_res res = {
6726 .pdev = pdev,
6727 };
6728 struct rpc_message msg = {
6729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6730 .rpc_argp = &args,
6731 .rpc_resp = &res,
6732 };
6733 int status;
6734
6735 dprintk("--> %s\n", __func__);
7c513058 6736 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6737 dprintk("<-- %s status=%d\n", __func__, status);
6738
6739 return status;
6740}
6741
6742int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6743{
6744 struct nfs4_exception exception = { };
6745 int err;
6746
6747 do {
6748 err = nfs4_handle_exception(server,
6749 _nfs4_proc_getdeviceinfo(server, pdev),
6750 &exception);
6751 } while (exception.retry);
6752 return err;
6753}
6754EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6755
863a3c6c
AA		 6756static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6757{
6758 struct nfs4_layoutcommit_data *data = calldata;
6759 struct nfs_server *server = NFS_SERVER(data->args.inode);
6760
6761 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6762 &data->res.seq_res, task))
863a3c6c
AA		 6763 return;
6764 rpc_call_start(task);
6765}
6766
6767static void
6768nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6769{
6770 struct nfs4_layoutcommit_data *data = calldata;
6771 struct nfs_server *server = NFS_SERVER(data->args.inode);
6772
6773 if (!nfs4_sequence_done(task, &data->res.seq_res))
6774 return;
6775
6776 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6777 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6778 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6779 case -NFS4ERR_BADLAYOUT: /* no layout */
6780 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6781 task->tk_status = 0;
e59d27e0
TM		 6782 break;
6783 case 0:
863a3c6c
AA		 6784 nfs_post_op_update_inode_force_wcc(data->args.inode,
6785 data->res.fattr);
e59d27e0
TM		 6786 break;
6787 default:
6788 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6789 rpc_restart_call_prepare(task);
6790 return;
6791 }
6792 }
863a3c6c
AA		 6793}
6794
6795static void nfs4_layoutcommit_release(void *calldata)
6796{
6797 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6798 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6799 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6800
db29c089 6801 pnfs_cleanup_layoutcommit(data);
863a3c6c 6802 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6803 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6804 list_del_init(&lseg->pls_lc_list);
6805 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6806 &lseg->pls_flags))
9369a431 6807 pnfs_put_lseg(lseg);
a9bae566 6808 }
92407e75
PT		 6809
6810 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6811 smp_mb__after_clear_bit();
6812 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6813
863a3c6c
AA		 6814 put_rpccred(data->cred);
6815 kfree(data);
6816}
6817
6818static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6819 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6820 .rpc_call_done = nfs4_layoutcommit_done,
6821 .rpc_release = nfs4_layoutcommit_release,
6822};
6823
6824int
ef311537 6825nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6826{
6827 struct rpc_message msg = {
6828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6829 .rpc_argp = &data->args,
6830 .rpc_resp = &data->res,
6831 .rpc_cred = data->cred,
6832 };
6833 struct rpc_task_setup task_setup_data = {
6834 .task = &data->task,
6835 .rpc_client = NFS_CLIENT(data->args.inode),
6836 .rpc_message = &msg,
6837 .callback_ops = &nfs4_layoutcommit_ops,
6838 .callback_data = data,
6839 .flags = RPC_TASK_ASYNC,
6840 };
6841 struct rpc_task *task;
6842 int status = 0;
6843
6844 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6845 "lbw: %llu inode %lu\n",
6846 data->task.tk_pid, sync,
6847 data->args.lastbytewritten,
6848 data->args.inode->i_ino);
6849
9d12b216 6850 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6851 task = rpc_run_task(&task_setup_data);
6852 if (IS_ERR(task))
6853 return PTR_ERR(task);
ef311537 6854 if (sync == false)
863a3c6c
AA		 6855 goto out;
6856 status = nfs4_wait_for_completion_rpc_task(task);
6857 if (status != 0)
6858 goto out;
6859 status = task->tk_status;
6860out:
6861 dprintk("%s: status %d\n", __func__, status);
6862 rpc_put_task(task);
6863 return status;
6864}
fca78d6d
BS		 6865
6866static int
6867_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6868 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6869{
6870 struct nfs41_secinfo_no_name_args args = {
6871 .style = SECINFO_STYLE_CURRENT_FH,
6872 };
6873 struct nfs4_secinfo_res res = {
6874 .flavors = flavors,
6875 };
6876 struct rpc_message msg = {
6877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6878 .rpc_argp = &args,
6879 .rpc_resp = &res,
6880 };
6881 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6882}
6883
6884static int
6885nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6886 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6887{
6888 struct nfs4_exception exception = { };
6889 int err;
6890 do {
6891 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6892 switch (err) {
6893 case 0:
6894 case -NFS4ERR_WRONGSEC:
6895 case -NFS4ERR_NOTSUPP:
05e9cfb4 6896 goto out;
fca78d6d
BS		 6897 default:
6898 err = nfs4_handle_exception(server, err, &exception);
6899 }
6900 } while (exception.retry);
05e9cfb4 6901out:
fca78d6d
BS		 6902 return err;
6903}
6904
6905static int
6906nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6907 struct nfs_fsinfo *info)
6908{
6909 int err;
6910 struct page *page;
6911 rpc_authflavor_t flavor;
6912 struct nfs4_secinfo_flavors *flavors;
6913
6914 page = alloc_page(GFP_KERNEL);
6915 if (!page) {
6916 err = -ENOMEM;
6917 goto out;
6918 }
6919
6920 flavors = page_address(page);
6921 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6922
6923 /*
6924 * Fall back on "guess and check" method if
6925 * the server doesn't support SECINFO_NO_NAME
6926 */
6927 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6928 err = nfs4_find_root_sec(server, fhandle, info);
6929 goto out_freepage;
6930 }
6931 if (err)
6932 goto out_freepage;
6933
6934 flavor = nfs_find_best_sec(flavors);
6935 if (err == 0)
6936 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6937
6938out_freepage:
6939 put_page(page);
6940 if (err == -EACCES)
6941 return -EPERM;
6942out:
6943 return err;
6944}
1cab0652
BS		 6945
6946static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6947{
6948 int status;
6949 struct nfs41_test_stateid_args args = {
1cab0652 6950 .stateid = stateid,
7d974794
BS		 6951 };
6952 struct nfs41_test_stateid_res res;
6953 struct rpc_message msg = {
6954 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6955 .rpc_argp = &args,
6956 .rpc_resp = &res,
6957 };
1cab0652 6958
38527b15 6959 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6960 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6961 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6962 if (status != NFS_OK) {
6963 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6964 return status;
38527b15
CL		 6965 }
6966 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6967 return -res.status;
7d974794
BS		 6968}
6969
38527b15
CL		 6970/**
6971 * nfs41_test_stateid - perform a TEST_STATEID operation
6972 *
6973 * @server: server / transport on which to perform the operation
6974 * @stateid: state ID to test
6975 *
6976 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6977 * Otherwise a negative NFS4ERR value is returned if the operation
6978 * failed or the state ID is not currently valid.
6979 */
1cab0652 6980static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6981{
6982 struct nfs4_exception exception = { };
6983 int err;
6984 do {
377e507d
CL		 6985 err = _nfs41_test_stateid(server, stateid);
6986 if (err != -NFS4ERR_DELAY)
6987 break;
6988 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6989 } while (exception.retry);
6990 return err;
6991}
9aeda35f 6992
1cab0652 6993static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6994{
9aeda35f 6995 struct nfs41_free_stateid_args args = {
1cab0652 6996 .stateid = stateid,
9aeda35f
BS		 6997 };
6998 struct nfs41_free_stateid_res res;
6999 struct rpc_message msg = {
7000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
7001 .rpc_argp = &args,
7002 .rpc_resp = &res,
7003 };
38527b15 7004 int status;
9aeda35f 7005
38527b15 7006 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 7007 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 7008 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 7009 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 7010 dprintk("NFS reply free_stateid: %d\n", status);
7011 return status;
9aeda35f
BS		 7012}
7013
38527b15
CL		 7014/**
7015 * nfs41_free_stateid - perform a FREE_STATEID operation
7016 *
7017 * @server: server / transport on which to perform the operation
7018 * @stateid: state ID to release
7019 *
7020 * Returns NFS_OK if the server freed "stateid". Otherwise a
7021 * negative NFS4ERR value is returned.
7022 */
1cab0652 7023static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 7024{
7025 struct nfs4_exception exception = { };
7026 int err;
7027 do {
377e507d
CL		 7028 err = _nfs4_free_stateid(server, stateid);
7029 if (err != -NFS4ERR_DELAY)
7030 break;
7031 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 7032 } while (exception.retry);
7033 return err;
7034}
36281caa
TM		 7035
7036static bool nfs41_match_stateid(const nfs4_stateid *s1,
7037 const nfs4_stateid *s2)
7038{
2d2f24ad 7039 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7040 return false;
7041
2d2f24ad 7042 if (s1->seqid == s2->seqid)
36281caa 7043 return true;
2d2f24ad 7044 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7045 return true;
7046
7047 return false;
7048}
7049
557134a3
AA		 7050#endif /* CONFIG_NFS_V4_1 */
7051
36281caa
TM		 7052static bool nfs4_match_stateid(const nfs4_stateid *s1,
7053 const nfs4_stateid *s2)
7054{
f597c537 7055 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7056}
7057
7058
17280175 7059static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7060 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7061 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7062 .recover_open = nfs4_open_reclaim,
7063 .recover_lock = nfs4_lock_reclaim,
591d71cb 7064 .establish_clid = nfs4_init_clientid,
90a16617 7065 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7066 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7067};
7068
591d71cb 7069#if defined(CONFIG_NFS_V4_1)
17280175 7070static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7071 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7072 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7073 .recover_open = nfs4_open_reclaim,
7074 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7075 .establish_clid = nfs41_init_clientid,
b4b82607 7076 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7077 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7078 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7079};
7080#endif /* CONFIG_NFS_V4_1 */
7081
17280175 7082static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7083 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7084 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7085 .recover_open = nfs4_open_expired,
7086 .recover_lock = nfs4_lock_expired,
7087 .establish_clid = nfs4_init_clientid,
90a16617 7088 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7089};
7090
7091#if defined(CONFIG_NFS_V4_1)
17280175 7092static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7093 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7094 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7095 .recover_open = nfs41_open_expired,
7096 .recover_lock = nfs41_lock_expired,
4d643d1d 7097 .establish_clid = nfs41_init_clientid,
b4b82607 7098 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7099};
591d71cb 7100#endif /* CONFIG_NFS_V4_1 */
1da177e4 7101
17280175 7102static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7103 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7104 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7105 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7106};
7107
7108#if defined(CONFIG_NFS_V4_1)
17280175 7109static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7110 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7111 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7112 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7113};
7114#endif
7115
97dc1359
TM		 7116static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7117 .minor_version = 0,
7118 .call_sync = _nfs4_call_sync,
36281caa 7119 .match_stateid = nfs4_match_stateid,
fca78d6d 7120 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 7121 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7122 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7123 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7124};
7125
7126#if defined(CONFIG_NFS_V4_1)
7127static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7128 .minor_version = 1,
7129 .call_sync = _nfs4_call_sync_session,
36281caa 7130 .match_stateid = nfs41_match_stateid,
fca78d6d 7131 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 7132 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7133 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7134 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7135};
7136#endif
7137
97dc1359
TM		 7138const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7139 [0] = &nfs_v4_0_minor_ops,
7140#if defined(CONFIG_NFS_V4_1)
7141 [1] = &nfs_v4_1_minor_ops,
7142#endif
7143};
7144
73a79706
BS		 7145const struct inode_operations nfs4_dir_inode_operations = {
7146 .create = nfs_create,
7147 .lookup = nfs_lookup,
7148 .atomic_open = nfs_atomic_open,
7149 .link = nfs_link,
7150 .unlink = nfs_unlink,
7151 .symlink = nfs_symlink,
7152 .mkdir = nfs_mkdir,
7153 .rmdir = nfs_rmdir,
7154 .mknod = nfs_mknod,
7155 .rename = nfs_rename,
7156 .permission = nfs_permission,
7157 .getattr = nfs_getattr,
7158 .setattr = nfs_setattr,
7159 .getxattr = generic_getxattr,
7160 .setxattr = generic_setxattr,
7161 .listxattr = generic_listxattr,
7162 .removexattr = generic_removexattr,
7163};
7164
92e1d5be 7165static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7166 .permission = nfs_permission,
7167 .getattr = nfs_getattr,
7168 .setattr = nfs_setattr,
64c2ce8b
AK		 7169 .getxattr = generic_getxattr,
7170 .setxattr = generic_setxattr,
7171 .listxattr = generic_listxattr,
7172 .removexattr = generic_removexattr,
6b3b5496
BF		 7173};
7174
509de811 7175const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7176 .version = 4, /* protocol version */
7177 .dentry_ops = &nfs4_dentry_operations,
7178 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7179 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7180 .file_ops = &nfs4_file_operations,
1da177e4 7181 .getroot = nfs4_proc_get_root,
281cad46 7182 .submount = nfs4_submount,
ff9099f2 7183 .try_mount = nfs4_try_mount,
1da177e4
LT		 7184 .getattr = nfs4_proc_getattr,
7185 .setattr = nfs4_proc_setattr,
7186 .lookup = nfs4_proc_lookup,
7187 .access = nfs4_proc_access,
7188 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7189 .create = nfs4_proc_create,
7190 .remove = nfs4_proc_remove,
7191 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7192 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7193 .unlink_done = nfs4_proc_unlink_done,
7194 .rename = nfs4_proc_rename,
d3d4152a 7195 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7196 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7197 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7198 .link = nfs4_proc_link,
7199 .symlink = nfs4_proc_symlink,
7200 .mkdir = nfs4_proc_mkdir,
7201 .rmdir = nfs4_proc_remove,
7202 .readdir = nfs4_proc_readdir,
7203 .mknod = nfs4_proc_mknod,
7204 .statfs = nfs4_proc_statfs,
7205 .fsinfo = nfs4_proc_fsinfo,
7206 .pathconf = nfs4_proc_pathconf,
e9326dca 7207 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7208 .decode_dirent = nfs4_decode_dirent,
7209 .read_setup = nfs4_proc_read_setup,
1abb5088 7210 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7211 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7212 .read_done = nfs4_read_done,
1da177e4 7213 .write_setup = nfs4_proc_write_setup,
57208fa7 7214 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7215 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7216 .write_done = nfs4_write_done,
1da177e4 7217 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7218 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7219 .commit_done = nfs4_commit_done,
1da177e4 7220 .lock = nfs4_proc_lock,
e50a1c2e 7221 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7222 .close_context = nfs4_close_context,
2b484297 7223 .open_context = nfs4_atomic_open,
011e2a7f 7224 .have_delegation = nfs4_have_delegation,
57ec14c5 7225 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7226 .alloc_client = nfs4_alloc_client,
45a52a02 7227 .init_client = nfs4_init_client,
cdb7eced 7228 .free_client = nfs4_free_client,
1179acc6
BS		 7229 .create_server = nfs4_create_server,
7230 .clone_server = nfs_clone_server,
1da177e4
LT		 7231};
7232
64c2ce8b
AK		 7233static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7234 .prefix = XATTR_NAME_NFSV4_ACL,
7235 .list = nfs4_xattr_list_nfs4_acl,
7236 .get = nfs4_xattr_get_nfs4_acl,
7237 .set = nfs4_xattr_set_nfs4_acl,
7238};
7239
7240const struct xattr_handler *nfs4_xattr_handlers[] = {
7241 &nfs4_xattr_nfs4_acl_handler,
7242 NULL
7243};
7244
1da177e4
LT		 7245/*
7246 * Local variables:
7247 * c-basic-offset: 8
7248 * End:
7249 */
kernel source for telekom puls (alcatel/mediatek)