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nfs: add memory barriers around NFS_INO_INVALID_DATA and NFS_INO_INVALIDATING
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
542 if (!RPC_WAS_SENT(task))
543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
dfb4f309 564 if (!res->sr_slot) {
13615871
AA		 565 /* just wake up the next guy waiting since
566 * we may have not consumed a slot after all */
691daf3b 567 dprintk("%s: No slot\n", __func__);
35dc1d74 568 return;
13615871 569 }
e3725ec0
TM		 570 tbl = res->sr_slot->table;
571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
b75ad4cd
TM		 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
f4af6e2a 584 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
14516c3a 595static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
933602e3 598 struct nfs4_slot *slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
933602e3 607 slot = res->sr_slot;
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c
AA		 694}
695
14516c3a
TM		 696static int nfs4_sequence_done(struct rpc_task *task,
697 struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455
TM		 704}
705
dc70d7b3 706int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 707 struct nfs4_sequence_args *args,
708 struct nfs4_sequence_res *res,
ce5039c1
AA		 709 struct rpc_task *task)
710{
fbcd4abc
AA		 711 struct nfs4_slot *slot;
712 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 713
714 dprintk("--> %s\n", __func__);
ce5039c1 715 /* slot already allocated? */
dfb4f309 716 if (res->sr_slot != NULL)
d9afbd1b 717 goto out_success;
ce5039c1 718
fbcd4abc
AA		 719 tbl = &session->fc_slot_table;
720
69d206b5
TM		 721 task->tk_timeout = 0;
722
fbcd4abc 723 spin_lock(&tbl->slot_tbl_lock);
774d5f14 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 725 !args->sa_privileged) {
0b1c8fc4 726 /* The state manager will wait until the slot table is empty */
0b1c8fc4 727 dprintk("%s session is draining\n", __func__);
7b939a3f 728 goto out_sleep;
689cf5c1
AB		 729 }
730
2dc03b7f 731 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 732 if (IS_ERR(slot)) {
733 /* If out of memory, try again in 1/4 second */
734 if (slot == ERR_PTR(-ENOMEM))
735 task->tk_timeout = HZ >> 2;
fbcd4abc 736 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 737 goto out_sleep;
fbcd4abc
AA		 738 }
739 spin_unlock(&tbl->slot_tbl_lock);
740
2b2fa717 741 args->sa_slot = slot;
fbcd4abc 742
e8d92382 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 744 slot->slot_nr, slot->seq_nr);
fbcd4abc 745
dfb4f309 746 res->sr_slot = slot;
8e63b6a8 747 res->sr_timestamp = jiffies;
2a6e26cd 748 res->sr_status_flags = 0;
fbcd4abc
AA		 749 /*
750 * sr_status is only set in decode_sequence, and so will remain
751 * set to 1 if an rpc level failure occurs.
752 */
753 res->sr_status = 1;
2f92ae34 754 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 755out_success:
756 rpc_call_start(task);
ce5039c1 757 return 0;
7b939a3f 758out_sleep:
8fe72bac
TM		 759 /* Privileged tasks are queued with top priority */
760 if (args->sa_privileged)
1e1093c7
TM		 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
762 NULL, RPC_PRIORITY_PRIVILEGED);
763 else
764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 765 spin_unlock(&tbl->slot_tbl_lock);
766 return -EAGAIN;
ce5039c1 767}
dc70d7b3 768EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 769
5a580e0a
CL		 770static int nfs4_setup_sequence(const struct nfs_server *server,
771 struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res,
773 struct rpc_task *task)
ce5039c1 774{
035168ab 775 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 776 int ret = 0;
777
3bd2384a
CL		 778 if (!session)
779 return nfs40_setup_sequence(server, args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
3bd2384a 820 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 821}
822
823static int nfs4_sequence_done(struct rpc_task *task,
824 struct nfs4_sequence_res *res)
825{
3bd2384a 826 return nfs40_sequence_done(task, res);
9915ea7e 827}
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
fd0c0953 880static
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1073 kfree(p);
1074}
1075
1076static void nfs4_opendata_put(struct nfs4_opendata *p)
1077{
1078 if (p != NULL)
1079 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1080}
1081
06f814a3
TM		 1082static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1083{
06f814a3
TM		 1084 int ret;
1085
06f814a3 1086 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1087 return ret;
1088}
1089
dc0b027d 1090static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1091{
1092 int ret = 0;
dc0b027d 1093
536e43d1 1094 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1095 goto out;
1096 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1097 case FMODE_READ:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1099 && state->n_rdonly != 0;
6ee41268
TM		 1100 break;
1101 case FMODE_WRITE:
88069f77
TM		 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1103 && state->n_wronly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1107 && state->n_rdwr != 0;
6ee41268 1108 }
dc0b027d 1109out:
6ee41268
TM		 1110 return ret;
1111}
1112
dc0b027d 1113static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1114{
652f89f6
TM		 1115 if (delegation == NULL)
1116 return 0;
dc0b027d 1117 if ((delegation->type & fmode) != fmode)
aac00a8d 1118 return 0;
15c831bf 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1120 return 0;
d25be546
TM		 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 return 0;
b7391f44 1123 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1124 return 1;
1125}
1126
dc0b027d 1127static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1128{
dc0b027d 1129 switch (fmode) {
e7616923
TM		 1130 case FMODE_WRITE:
1131 state->n_wronly++;
1132 break;
1133 case FMODE_READ:
1134 state->n_rdonly++;
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 state->n_rdwr++;
1138 }
dc0b027d 1139 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1140}
1141
dc0b027d 1142static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1143{
1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1145 nfs4_stateid_copy(&state->stateid, stateid);
1146 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1147 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1148 switch (fmode) {
003707c7
TM		 1149 case FMODE_READ:
1150 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 break;
1152 case FMODE_WRITE:
1153 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 set_bit(NFS_O_RDWR_STATE, &state->flags);
1157 }
e7616923
TM		 1158}
1159
dc0b027d 1160static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1161{
8bda4e4c 1162 write_seqlock(&state->seqlock);
dc0b027d 1163 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1164 write_sequnlock(&state->seqlock);
003707c7
TM		 1165}
1166
dc0b027d 1167static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1168{
8bda4e4c
TM		 1169 /*
1170 * Protect the call to nfs4_state_set_mode_locked and
1171 * serialise the stateid update
1172 */
1173 write_seqlock(&state->seqlock);
003707c7 1174 if (deleg_stateid != NULL) {
f597c537 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1176 set_bit(NFS_DELEGATED_STATE, &state->flags);
1177 }
1178 if (open_stateid != NULL)
dc0b027d 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1180 write_sequnlock(&state->seqlock);
1181 spin_lock(&state->owner->so_lock);
dc0b027d 1182 update_open_stateflags(state, fmode);
ec073428 1183 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1184}
1185
dc0b027d 1186static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_delegation *deleg_cur;
1190 int ret = 0;
1191
dc0b027d 1192 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1193
1194 rcu_read_lock();
1195 deleg_cur = rcu_dereference(nfsi->delegation);
1196 if (deleg_cur == NULL)
1197 goto no_delegation;
1198
1199 spin_lock(&deleg_cur->lock);
17f26b12 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1202 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1203 goto no_delegation_unlock;
1204
1205 if (delegation == NULL)
1206 delegation = &deleg_cur->stateid;
f597c537 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1208 goto no_delegation_unlock;
1209
b7391f44 1210 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1212 ret = 1;
1213no_delegation_unlock:
1214 spin_unlock(&deleg_cur->lock);
1215no_delegation:
1216 rcu_read_unlock();
1217
1218 if (!ret && open_stateid != NULL) {
dc0b027d 1219 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1220 ret = 1;
1221 }
1222
1223 return ret;
1224}
1225
1226
dc0b027d 1227static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1228{
1229 struct nfs_delegation *delegation;
1230
1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1234 rcu_read_unlock();
1235 return;
1236 }
1237 rcu_read_unlock();
57ec14c5 1238 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1239}
1240
6ee41268 1241static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1242{
1243 struct nfs4_state *state = opendata->state;
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *delegation;
f448badd 1246 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1247 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1248 nfs4_stateid stateid;
1249 int ret = -EAGAIN;
1250
aac00a8d 1251 for (;;) {
dc0b027d 1252 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1253 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1254 if (can_open_cached(state, fmode, open_mode)) {
1255 update_open_stateflags(state, fmode);
6ee41268 1256 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1257 goto out_return_state;
1258 }
1259 spin_unlock(&state->owner->so_lock);
1260 }
34310430
TM		 1261 rcu_read_lock();
1262 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1263 if (!can_open_delegated(delegation, fmode)) {
34310430 1264 rcu_read_unlock();
aac00a8d 1265 break;
34310430 1266 }
aac00a8d 1267 /* Save the delegation */
f597c537 1268 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1269 rcu_read_unlock();
fa332941 1270 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1271 if (!opendata->is_recover) {
1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1273 if (ret != 0)
1274 goto out;
1275 }
aac00a8d 1276 ret = -EAGAIN;
34310430
TM		 1277
1278 /* Try to update the stateid using the delegation */
dc0b027d 1279 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1280 goto out_return_state;
aac00a8d 1281 }
aac00a8d
TM		 1282out:
1283 return ERR_PTR(ret);
1284out_return_state:
1285 atomic_inc(&state->count);
1286 return state;
1287}
1288
e23008ec
AA		 1289static void
1290nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1291{
1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1293 struct nfs_delegation *delegation;
1294 int delegation_flags = 0;
1295
1296 rcu_read_lock();
1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1298 if (delegation)
1299 delegation_flags = delegation->flags;
1300 rcu_read_unlock();
1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1303 "returning a delegation for "
1304 "OPEN(CLAIM_DELEGATE_CUR)\n",
1305 clp->cl_hostname);
1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1307 nfs_inode_set_delegation(state->inode,
1308 data->owner->so_cred,
1309 &data->o_res);
1310 else
1311 nfs_inode_reclaim_delegation(state->inode,
1312 data->owner->so_cred,
1313 &data->o_res);
1314}
1315
1316/*
1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1318 * and update the nfs4_state.
1319 */
1320static struct nfs4_state *
1321_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1322{
1323 struct inode *inode = data->state->inode;
1324 struct nfs4_state *state = data->state;
1325 int ret;
1326
d2bfda2e
WAA		 1327 if (!data->rpc_done) {
1328 if (data->rpc_status) {
1329 ret = data->rpc_status;
1330 goto err;
1331 }
1332 /* cached opens have already been processed */
1333 goto update;
e23008ec
AA		 1334 }
1335
e23008ec
AA		 1336 ret = nfs_refresh_inode(inode, &data->f_attr);
1337 if (ret)
1338 goto err;
1339
1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1342update:
e23008ec
AA		 1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
d49f042a 1345 atomic_inc(&state->count);
e23008ec
AA		 1346
1347 return state;
1348err:
1349 return ERR_PTR(ret);
1350
1351}
1352
1353static struct nfs4_state *
1354_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1355{
1356 struct inode *inode;
1357 struct nfs4_state *state = NULL;
1b370bc2 1358 int ret;
24ac23ab 1359
aac00a8d 1360 if (!data->rpc_done) {
6ee41268 1361 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1362 goto out;
1363 }
1364
1b370bc2 1365 ret = -EAGAIN;
24ac23ab 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1367 goto err;
1775fd3e 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1369 ret = PTR_ERR(inode);
03f28e3a 1370 if (IS_ERR(inode))
1b370bc2
TM		 1371 goto err;
1372 ret = -ENOMEM;
24ac23ab
TM		 1373 state = nfs4_get_open_state(inode, data->owner);
1374 if (state == NULL)
1b370bc2 1375 goto err_put_inode;
e23008ec
AA		 1376 if (data->o_res.delegation_type != 0)
1377 nfs4_opendata_check_deleg(data, state);
34310430 1378 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1379 data->o_arg.fmode);
24ac23ab 1380 iput(inode);
aac00a8d 1381out:
7aa262b5 1382 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1383 return state;
1b370bc2
TM		 1384err_put_inode:
1385 iput(inode);
1386err:
1387 return ERR_PTR(ret);
24ac23ab
TM		 1388}
1389
e23008ec
AA		 1390static struct nfs4_state *
1391nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1394 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1395 return _nfs4_opendata_to_nfs4_state(data);
1396}
1397
864472e9
TM		 1398static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1399{
1400 struct nfs_inode *nfsi = NFS_I(state->inode);
1401 struct nfs_open_context *ctx;
1402
1403 spin_lock(&state->inode->i_lock);
1404 list_for_each_entry(ctx, &nfsi->open_files, list) {
1405 if (ctx->state != state)
1406 continue;
1407 get_nfs_open_context(ctx);
1408 spin_unlock(&state->inode->i_lock);
1409 return ctx;
1410 }
1411 spin_unlock(&state->inode->i_lock);
1412 return ERR_PTR(-ENOENT);
1413}
1414
4a1c0893
TM		 1415static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1416 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1417{
1418 struct nfs4_opendata *opendata;
1419
4a1c0893 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1421 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1422 if (opendata == NULL)
1423 return ERR_PTR(-ENOMEM);
1424 opendata->state = state;
1425 atomic_inc(&state->count);
1426 return opendata;
1427}
1428
dc0b027d 1429static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1430{
2ced46c2 1431 struct nfs4_state *newstate;
864472e9
TM		 1432 int ret;
1433
dc0b027d
TM		 1434 opendata->o_arg.open_flags = 0;
1435 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1438 nfs4_init_opendata_res(opendata);
b257957e 1439 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1440 if (ret != 0)
1441 return ret;
2ced46c2 1442 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1443 if (IS_ERR(newstate))
1444 return PTR_ERR(newstate);
643168c2 1445 nfs4_close_state(newstate, fmode);
2ced46c2 1446 *res = newstate;
864472e9
TM		 1447 return 0;
1448}
1449
1450static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1451{
864472e9 1452 struct nfs4_state *newstate;
864472e9
TM		 1453 int ret;
1454
1455 /* memory barrier prior to reading state->n_* */
2ced46c2 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1457 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1458 smp_rmb();
1459 if (state->n_rdwr != 0) {
b0ed9dbc 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1462 if (ret != 0)
1463 return ret;
2ced46c2
TM		 1464 if (newstate != state)
1465 return -ESTALE;
864472e9
TM		 1466 }
1467 if (state->n_wronly != 0) {
b0ed9dbc 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1470 if (ret != 0)
1471 return ret;
2ced46c2
TM		 1472 if (newstate != state)
1473 return -ESTALE;
864472e9
TM		 1474 }
1475 if (state->n_rdonly != 0) {
b0ed9dbc 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1478 if (ret != 0)
1479 return ret;
2ced46c2
TM		 1480 if (newstate != state)
1481 return -ESTALE;
864472e9 1482 }
1ac7e2fd
TM		 1483 /*
1484 * We may have performed cached opens for all three recoveries.
1485 * Check if we need to update the current stateid.
1486 */
1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1489 write_seqlock(&state->seqlock);
1ac7e2fd 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1492 write_sequnlock(&state->seqlock);
1ac7e2fd 1493 }
864472e9
TM		 1494 return 0;
1495}
1496
1da177e4
LT		 1497/*
1498 * OPEN_RECLAIM:
1499 * reclaim state on the server after a reboot.
1da177e4 1500 */
539cd03a 1501static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1502{
1ac7e2fd 1503 struct nfs_delegation *delegation;
864472e9 1504 struct nfs4_opendata *opendata;
dc0b027d 1505 fmode_t delegation_type = 0;
1da177e4
LT		 1506 int status;
1507
4a1c0893
TM		 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1509 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1510 if (IS_ERR(opendata))
1511 return PTR_ERR(opendata);
1ac7e2fd
TM		 1512 rcu_read_lock();
1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1515 delegation_type = delegation->type;
1ac7e2fd 1516 rcu_read_unlock();
864472e9
TM		 1517 opendata->o_arg.u.delegation_type = delegation_type;
1518 status = nfs4_open_recover(opendata, state);
c6d00e63 1519 nfs4_opendata_put(opendata);
1da177e4
LT		 1520 return status;
1521}
1522
539cd03a 1523static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1524{
1525 struct nfs_server *server = NFS_SERVER(state->inode);
1526 struct nfs4_exception exception = { };
1527 int err;
1528 do {
539cd03a 1529 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1530 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1532 continue;
168667c4 1533 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1534 break;
1535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1536 } while (exception.retry);
1537 return err;
1538}
1539
864472e9
TM		 1540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1541{
1542 struct nfs_open_context *ctx;
1543 int ret;
1544
1545 ctx = nfs4_state_find_open_context(state);
1546 if (IS_ERR(ctx))
91876b13 1547 return -EAGAIN;
539cd03a 1548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1549 put_nfs_open_context(ctx);
1550 return ret;
1551}
1552
db4f2e63 1553static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1554{
be76b5b6
TM		 1555 switch (err) {
1556 default:
1557 printk(KERN_ERR "NFS: %s: unhandled error "
1558 "%d.\n", __func__, err);
1559 case 0:
1560 case -ENOENT:
1561 case -ESTALE:
1562 break;
1563 case -NFS4ERR_BADSESSION:
1564 case -NFS4ERR_BADSLOT:
1565 case -NFS4ERR_BAD_HIGH_SLOT:
1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1567 case -NFS4ERR_DEADSESSION:
1568 set_bit(NFS_DELEGATED_STATE, &state->flags);
1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1570 return -EAGAIN;
1571 case -NFS4ERR_STALE_CLIENTID:
1572 case -NFS4ERR_STALE_STATEID:
1573 set_bit(NFS_DELEGATED_STATE, &state->flags);
1574 case -NFS4ERR_EXPIRED:
1575 /* Don't recall a delegation if it was lost */
1576 nfs4_schedule_lease_recovery(server->nfs_client);
1577 return -EAGAIN;
352297b9
CL		 1578 case -NFS4ERR_MOVED:
1579 nfs4_schedule_migration_recovery(server);
1580 return -EAGAIN;
8ef2f8d4
CL		 1581 case -NFS4ERR_LEASE_MOVED:
1582 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1583 return -EAGAIN;
be76b5b6
TM		 1584 case -NFS4ERR_DELEG_REVOKED:
1585 case -NFS4ERR_ADMIN_REVOKED:
1586 case -NFS4ERR_BAD_STATEID:
db4f2e63 1587 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1588 nfs_inode_find_state_and_recover(state->inode,
1589 stateid);
1590 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1591 return 0;
1592 case -NFS4ERR_DELAY:
1593 case -NFS4ERR_GRACE:
1594 set_bit(NFS_DELEGATED_STATE, &state->flags);
1595 ssleep(1);
1596 return -EAGAIN;
db4f2e63
TM		 1597 case -ENOMEM:
1598 case -NFS4ERR_DENIED:
1599 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1600 return 0;
be76b5b6 1601 }
1da177e4
LT		 1602 return err;
1603}
1604
db4f2e63
TM		 1605int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1606{
1607 struct nfs_server *server = NFS_SERVER(state->inode);
1608 struct nfs4_opendata *opendata;
1609 int err;
1610
1611 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1612 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1613 if (IS_ERR(opendata))
1614 return PTR_ERR(opendata);
1615 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1616 err = nfs4_open_recover(opendata, state);
1617 nfs4_opendata_put(opendata);
1618 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1619}
1620
be05c860
CL		 1621static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1622{
1623 struct nfs4_opendata *data = calldata;
1624
1625 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1626 &data->o_res.seq_res, task);
1627}
1628
cdd4e68b
TM		 1629static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1630{
1631 struct nfs4_opendata *data = calldata;
1632
be05c860
CL		 1633 nfs40_sequence_done(task, &data->o_res.seq_res);
1634
cdd4e68b 1635 data->rpc_status = task->tk_status;
26e976a8 1636 if (data->rpc_status == 0) {
f597c537 1637 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1638 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1639 renew_lease(data->o_res.server, data->timestamp);
3e309914 1640 data->rpc_done = 1;
26e976a8 1641 }
cdd4e68b
TM		 1642}
1643
1644static void nfs4_open_confirm_release(void *calldata)
1645{
1646 struct nfs4_opendata *data = calldata;
1647 struct nfs4_state *state = NULL;
1648
1649 /* If this request hasn't been cancelled, do nothing */
1650 if (data->cancelled == 0)
1651 goto out_free;
1652 /* In case of error, no cleanup! */
3e309914 1653 if (!data->rpc_done)
cdd4e68b 1654 goto out_free;
cdd4e68b 1655 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1656 if (!IS_ERR(state))
643168c2 1657 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1658out_free:
c6d00e63 1659 nfs4_opendata_put(data);
cdd4e68b
TM		 1660}
1661
1662static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1663 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1664 .rpc_call_done = nfs4_open_confirm_done,
1665 .rpc_release = nfs4_open_confirm_release,
1666};
1667
1668/*
1669 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1670 */
1671static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1672{
1673 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1674 struct rpc_task *task;
5138fde0
TM		 1675 struct rpc_message msg = {
1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1677 .rpc_argp = &data->c_arg,
1678 .rpc_resp = &data->c_res,
1679 .rpc_cred = data->owner->so_cred,
1680 };
c970aa85
TM		 1681 struct rpc_task_setup task_setup_data = {
1682 .rpc_client = server->client,
5138fde0 1683 .rpc_message = &msg,
c970aa85
TM		 1684 .callback_ops = &nfs4_open_confirm_ops,
1685 .callback_data = data,
101070ca 1686 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1687 .flags = RPC_TASK_ASYNC,
1688 };
1da177e4
LT		 1689 int status;
1690
be05c860 1691 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1692 kref_get(&data->kref);
3e309914
TM		 1693 data->rpc_done = 0;
1694 data->rpc_status = 0;
5138fde0 1695 data->timestamp = jiffies;
c970aa85 1696 task = rpc_run_task(&task_setup_data);
7a1218a2 1697 if (IS_ERR(task))
cdd4e68b 1698 return PTR_ERR(task);
cdd4e68b
TM		 1699 status = nfs4_wait_for_completion_rpc_task(task);
1700 if (status != 0) {
1701 data->cancelled = 1;
1702 smp_wmb();
1703 } else
1704 status = data->rpc_status;
e6b3c4db 1705 rpc_put_task(task);
1da177e4
LT		 1706 return status;
1707}
1708
24ac23ab 1709static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1710{
24ac23ab
TM		 1711 struct nfs4_opendata *data = calldata;
1712 struct nfs4_state_owner *sp = data->owner;
549b19cc 1713 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1714
24ac23ab 1715 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1716 goto out_wait;
aac00a8d
TM		 1717 /*
1718 * Check if we still need to send an OPEN call, or if we can use
1719 * a delegation instead.
1720 */
1721 if (data->state != NULL) {
1722 struct nfs_delegation *delegation;
1723
dc0b027d 1724 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1725 goto out_no_action;
aac00a8d
TM		 1726 rcu_read_lock();
1727 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1728 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1729 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1730 can_open_delegated(delegation, data->o_arg.fmode))
1731 goto unlock_no_action;
aac00a8d
TM		 1732 rcu_read_unlock();
1733 }
95b72eb0 1734 /* Update client id. */
549b19cc 1735 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1736 switch (data->o_arg.claim) {
1737 case NFS4_OPEN_CLAIM_PREVIOUS:
1738 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1739 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1740 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1741 case NFS4_OPEN_CLAIM_FH:
1742 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1743 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1744 }
26e976a8 1745 data->timestamp = jiffies;
035168ab 1746 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1747 &data->o_arg.seq_args,
2240a9e2
TM		 1748 &data->o_res.seq_res,
1749 task) != 0)
1750 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1751
1752 /* Set the create mode (note dependency on the session type) */
1753 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1754 if (data->o_arg.open_flags & O_EXCL) {
1755 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1756 if (nfs4_has_persistent_session(clp))
1757 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1758 else if (clp->cl_mvops->minor_version > 0)
1759 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1760 }
6ee41268 1761 return;
652f89f6
TM		 1762unlock_no_action:
1763 rcu_read_unlock();
6ee41268
TM		 1764out_no_action:
1765 task->tk_action = NULL;
c8da19b9 1766out_wait:
b75ad4cd 1767 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1768}
1769
24ac23ab
TM		 1770static void nfs4_open_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1da177e4 1773
24ac23ab 1774 data->rpc_status = task->tk_status;
d898528c 1775
14516c3a
TM		 1776 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1777 return;
d898528c 1778
24ac23ab 1779 if (task->tk_status == 0) {
807d66d8
TM		 1780 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1781 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1782 case S_IFREG:
1783 break;
1784 case S_IFLNK:
24ac23ab 1785 data->rpc_status = -ELOOP;
6f926b5b
TM		 1786 break;
1787 case S_IFDIR:
24ac23ab 1788 data->rpc_status = -EISDIR;
6f926b5b
TM		 1789 break;
1790 default:
24ac23ab 1791 data->rpc_status = -ENOTDIR;
807d66d8 1792 }
6f926b5b 1793 }
26e976a8 1794 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1795 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1796 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1797 }
3e309914 1798 data->rpc_done = 1;
24ac23ab 1799}
6f926b5b 1800
24ac23ab
TM		 1801static void nfs4_open_release(void *calldata)
1802{
1803 struct nfs4_opendata *data = calldata;
1804 struct nfs4_state *state = NULL;
1805
1806 /* If this request hasn't been cancelled, do nothing */
1807 if (data->cancelled == 0)
1808 goto out_free;
1809 /* In case of error, no cleanup! */
3e309914 1810 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1811 goto out_free;
1812 /* In case we need an open_confirm, no cleanup! */
1813 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1814 goto out_free;
24ac23ab 1815 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1816 if (!IS_ERR(state))
643168c2 1817 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1818out_free:
c6d00e63 1819 nfs4_opendata_put(data);
24ac23ab
TM		 1820}
1821
1822static const struct rpc_call_ops nfs4_open_ops = {
1823 .rpc_call_prepare = nfs4_open_prepare,
1824 .rpc_call_done = nfs4_open_done,
1825 .rpc_release = nfs4_open_release,
1826};
1827
b257957e 1828static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1829{
1830 struct inode *dir = data->dir->d_inode;
1831 struct nfs_server *server = NFS_SERVER(dir);
1832 struct nfs_openargs *o_arg = &data->o_arg;
1833 struct nfs_openres *o_res = &data->o_res;
1834 struct rpc_task *task;
5138fde0
TM		 1835 struct rpc_message msg = {
1836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1837 .rpc_argp = o_arg,
1838 .rpc_resp = o_res,
1839 .rpc_cred = data->owner->so_cred,
1840 };
c970aa85
TM		 1841 struct rpc_task_setup task_setup_data = {
1842 .rpc_client = server->client,
5138fde0 1843 .rpc_message = &msg,
c970aa85
TM		 1844 .callback_ops = &nfs4_open_ops,
1845 .callback_data = data,
101070ca 1846 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1847 .flags = RPC_TASK_ASYNC,
1848 };
24ac23ab
TM		 1849 int status;
1850
a9c92d6b 1851 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1852 kref_get(&data->kref);
3e309914
TM		 1853 data->rpc_done = 0;
1854 data->rpc_status = 0;
2ced46c2 1855 data->cancelled = 0;
bdeca1b7
TM		 1856 data->is_recover = 0;
1857 if (isrecover) {
8fe72bac 1858 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1859 data->is_recover = 1;
1860 }
c970aa85 1861 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1862 if (IS_ERR(task))
1863 return PTR_ERR(task);
1864 status = nfs4_wait_for_completion_rpc_task(task);
1865 if (status != 0) {
1866 data->cancelled = 1;
1867 smp_wmb();
1868 } else
1869 status = data->rpc_status;
1870 rpc_put_task(task);
1871
1872 return status;
1873}
1874
1875static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1876{
1877 struct inode *dir = data->dir->d_inode;
1878 struct nfs_openres *o_res = &data->o_res;
1879 int status;
1880
1881 status = nfs4_run_open_task(data, 1);
1882 if (status != 0 || !data->rpc_done)
1883 return status;
1884
6926afd1
TM		 1885 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1886
b257957e
AB		 1887 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1888 status = _nfs4_proc_open_confirm(data);
1889 if (status != 0)
1890 return status;
1891 }
1892
1893 return status;
1894}
1895
6168f62c
WAA		 1896static int nfs4_opendata_access(struct rpc_cred *cred,
1897 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1898 struct nfs4_state *state, fmode_t fmode,
1899 int openflags)
6168f62c
WAA		 1900{
1901 struct nfs_access_entry cache;
1902 u32 mask;
1903
1904 /* access call failed or for some reason the server doesn't
1905 * support any access modes -- defer access call until later */
1906 if (opendata->o_res.access_supported == 0)
1907 return 0;
1908
1909 mask = 0;
bbd3a8ee 1910 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1911 * write mode bits, but POSIX allows the creating process to write.
1912 * use openflags to check for exec, because fmode won't
1913 * always have FMODE_EXEC set when file open for exec. */
1914 if (openflags & __FMODE_EXEC) {
1915 /* ONLY check for exec rights */
1916 mask = MAY_EXEC;
1917 } else if (fmode & FMODE_READ)
1918 mask = MAY_READ;
6168f62c
WAA		 1919
1920 cache.cred = cred;
1921 cache.jiffies = jiffies;
1922 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1923 nfs_access_add_cache(state->inode, &cache);
1924
bbd3a8ee 1925 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1926 return 0;
1927
1928 /* even though OPEN succeeded, access is denied. Close the file */
1929 nfs4_close_state(state, fmode);
998f40b5 1930 return -EACCES;
6168f62c
WAA		 1931}
1932
b257957e
AB		 1933/*
1934 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1935 */
1936static int _nfs4_proc_open(struct nfs4_opendata *data)
1937{
1938 struct inode *dir = data->dir->d_inode;
1939 struct nfs_server *server = NFS_SERVER(dir);
1940 struct nfs_openargs *o_arg = &data->o_arg;
1941 struct nfs_openres *o_res = &data->o_res;
1942 int status;
1943
1944 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1945 if (!data->rpc_done)
1946 return status;
1947 if (status != 0) {
1948 if (status == -NFS4ERR_BADNAME &&
1949 !(o_arg->open_flags & O_CREAT))
1950 return -ENOENT;
24ac23ab 1951 return status;
08ef7bd3 1952 }
24ac23ab 1953
6926afd1
TM		 1954 nfs_fattr_map_and_free_names(server, &data->f_attr);
1955
5bc2afc2 1956 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1957 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1958 if (o_arg->open_flags & O_EXCL)
1959 data->file_created = 1;
1960 else if (o_res->cinfo.before != o_res->cinfo.after)
1961 data->file_created = 1;
1962 }
0df5dd4a
TM		 1963 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1964 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1965 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1966 status = _nfs4_proc_open_confirm(data);
1da177e4 1967 if (status != 0)
24ac23ab 1968 return status;
1da177e4
LT		 1969 }
1970 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1971 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1972 return 0;
1da177e4
LT		 1973}
1974
d83217c1
AA		 1975static int nfs4_recover_expired_lease(struct nfs_server *server)
1976{
1977 return nfs4_client_recover_expired_lease(server->nfs_client);
1978}
1979
1da177e4
LT		 1980/*
1981 * OPEN_EXPIRED:
1982 * reclaim state on the server after a network partition.
1983 * Assumes caller holds the appropriate lock
1984 */
539cd03a 1985static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1986{
e56e0b78 1987 struct nfs4_opendata *opendata;
864472e9 1988 int ret;
1da177e4 1989
4a1c0893 1990 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1991 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1992 if (IS_ERR(opendata))
1993 return PTR_ERR(opendata);
864472e9 1994 ret = nfs4_open_recover(opendata, state);
35d05778 1995 if (ret == -ESTALE)
3d4ff43d 1996 d_drop(ctx->dentry);
c6d00e63 1997 nfs4_opendata_put(opendata);
864472e9 1998 return ret;
1da177e4
LT		 1999}
2000
a9ed2e25 2001static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2002{
539cd03a 2003 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2004 struct nfs4_exception exception = { };
2005 int err;
2006
2007 do {
539cd03a 2008 err = _nfs4_open_expired(ctx, state);
42113a75 2009 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2010 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2011 continue;
a9ed2e25
TM		 2012 switch (err) {
2013 default:
2014 goto out;
2015 case -NFS4ERR_GRACE:
2016 case -NFS4ERR_DELAY:
2017 nfs4_handle_exception(server, err, &exception);
2018 err = 0;
2019 }
202b50dc 2020 } while (exception.retry);
a9ed2e25 2021out:
202b50dc
TM		 2022 return err;
2023}
2024
1da177e4
LT		 2025static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2026{
1da177e4 2027 struct nfs_open_context *ctx;
864472e9 2028 int ret;
1da177e4 2029
864472e9
TM		 2030 ctx = nfs4_state_find_open_context(state);
2031 if (IS_ERR(ctx))
91876b13 2032 return -EAGAIN;
539cd03a 2033 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2034 put_nfs_open_context(ctx);
2035 return ret;
1da177e4
LT		 2036}
2037
f062eb6c 2038#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2039static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2040{
f062eb6c 2041 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2042 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2043 struct nfs_delegation *delegation;
2044 struct rpc_cred *cred = NULL;
2045 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2046
2047 /* If a state reset has been done, test_stateid is unneeded */
2048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2049 return;
2050
ab7cb0df
TM		 2051 /* Get the delegation credential for use by test/free_stateid */
2052 rcu_read_lock();
2053 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2054 if (delegation != NULL &&
2055 nfs4_stateid_match(&delegation->stateid, stateid)) {
2056 cred = get_rpccred(delegation->cred);
2057 rcu_read_unlock();
2058 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2059 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2060 } else
2061 rcu_read_unlock();
2062
3e60ffdd
CL		 2063 if (status != NFS_OK) {
2064 /* Free the stateid unless the server explicitly
2065 * informs us the stateid is unrecognized. */
2066 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2067 nfs41_free_stateid(server, stateid, cred);
6938867e 2068 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2069
6938867e
BS		 2070 write_seqlock(&state->seqlock);
2071 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2072 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2073 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2074 }
ab7cb0df
TM		 2075
2076 if (cred != NULL)
2077 put_rpccred(cred);
3e60ffdd
CL		 2078}
2079
2080/**
2081 * nfs41_check_open_stateid - possibly free an open stateid
2082 *
2083 * @state: NFSv4 state for an inode
2084 *
2085 * Returns NFS_OK if recovery for this stateid is now finished.
2086 * Otherwise a negative NFS4ERR value is returned.
2087 */
2088static int nfs41_check_open_stateid(struct nfs4_state *state)
2089{
2090 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2091 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2092 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2093 int status;
2094
2095 /* If a state reset has been done, test_stateid is unneeded */
2096 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2097 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2098 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2099 return -NFS4ERR_BAD_STATEID;
2100
ab7cb0df 2101 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2102 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2103 if (status != NFS_OK) {
2104 /* Free the stateid unless the server explicitly
2105 * informs us the stateid is unrecognized. */
2106 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2107 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2108
2109 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2110 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2111 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2112 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2113 }
2114 return status;
2115}
2116
2117static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2118{
eb64cf96 2119 int status;
b01dd1d8 2120
3e60ffdd
CL		 2121 nfs41_clear_delegation_stateid(state);
2122 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2123 if (status != NFS_OK)
2124 status = nfs4_open_expired(sp, state);
2125 return status;
f062eb6c
BS		 2126}
2127#endif
2128
aa53ed54
JL		 2129/*
2130 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2131 * fields corresponding to attributes that were used to store the verifier.
2132 * Make sure we clobber those fields in the later setattr call
2133 */
2134static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2135{
2136 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2137 !(sattr->ia_valid & ATTR_ATIME_SET))
2138 sattr->ia_valid |= ATTR_ATIME;
2139
2140 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2141 !(sattr->ia_valid & ATTR_MTIME_SET))
2142 sattr->ia_valid |= ATTR_MTIME;
2143}
2144
c21443c2
TM		 2145static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2146 fmode_t fmode,
2147 int flags,
3efb9722 2148 struct nfs_open_context *ctx)
c21443c2
TM		 2149{
2150 struct nfs4_state_owner *sp = opendata->owner;
2151 struct nfs_server *server = sp->so_server;
275bb307 2152 struct dentry *dentry;
c21443c2
TM		 2153 struct nfs4_state *state;
2154 unsigned int seq;
2155 int ret;
2156
2157 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2158
2159 ret = _nfs4_proc_open(opendata);
2160 if (ret != 0)
2161 goto out;
2162
2163 state = nfs4_opendata_to_nfs4_state(opendata);
2164 ret = PTR_ERR(state);
2165 if (IS_ERR(state))
2166 goto out;
2167 if (server->caps & NFS_CAP_POSIX_LOCK)
2168 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2169
275bb307
TM		 2170 dentry = opendata->dentry;
2171 if (dentry->d_inode == NULL) {
2172 /* FIXME: Is this d_drop() ever needed? */
2173 d_drop(dentry);
2174 dentry = d_add_unique(dentry, igrab(state->inode));
2175 if (dentry == NULL) {
2176 dentry = opendata->dentry;
2177 } else if (dentry != ctx->dentry) {
2178 dput(ctx->dentry);
2179 ctx->dentry = dget(dentry);
2180 }
2181 nfs_set_verifier(dentry,
2182 nfs_save_change_attribute(opendata->dir->d_inode));
2183 }
2184
c21443c2
TM		 2185 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2186 if (ret != 0)
2187 goto out;
2188
3efb9722 2189 ctx->state = state;
c45ffdd2
TM		 2190 if (dentry->d_inode == state->inode) {
2191 nfs_inode_attach_open_context(ctx);
2192 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2193 nfs4_schedule_stateid_recovery(server, state);
2194 }
c21443c2
TM		 2195out:
2196 return ret;
2197}
2198
1da177e4 2199/*
24ac23ab 2200 * Returns a referenced nfs4_state
1da177e4 2201 */
82be417a 2202static int _nfs4_do_open(struct inode *dir,
4197a055 2203 struct nfs_open_context *ctx,
82be417a
AA		 2204 int flags,
2205 struct iattr *sattr,
5bc2afc2
TM		 2206 struct nfs4_label *label,
2207 int *opened)
1da177e4
LT		 2208{
2209 struct nfs4_state_owner *sp;
2210 struct nfs4_state *state = NULL;
2211 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2212 struct nfs4_opendata *opendata;
4197a055
TM		 2213 struct dentry *dentry = ctx->dentry;
2214 struct rpc_cred *cred = ctx->cred;
2215 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2216 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2217 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2218 struct nfs4_label *olabel = NULL;
aac00a8d 2219 int status;
1da177e4
LT		 2220
2221 /* Protect against reboot recovery conflicts */
1da177e4 2222 status = -ENOMEM;
d1e284d5
TM		 2223 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2224 if (sp == NULL) {
1da177e4
LT		 2225 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2226 goto out_err;
2227 }
58d9714a
TM		 2228 status = nfs4_recover_expired_lease(server);
2229 if (status != 0)
b4454fe1 2230 goto err_put_state_owner;
82a2c1b7
AV		 2231 if (dentry->d_inode != NULL)
2232 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2233 status = -ENOMEM;
49f9a0fa
TM		 2234 if (dentry->d_inode)
2235 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2236 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2237 label, claim, GFP_KERNEL);
e56e0b78 2238 if (opendata == NULL)
95d35cb4 2239 goto err_put_state_owner;
1da177e4 2240
14c43f76
DQ		 2241 if (label) {
2242 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2243 if (IS_ERR(olabel)) {
2244 status = PTR_ERR(olabel);
2245 goto err_opendata_put;
2246 }
2247 }
2248
82be417a
AA		 2249 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2250 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2251 if (!opendata->f_attr.mdsthreshold)
14c43f76 2252 goto err_free_label;
1549210f 2253 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2254 }
82a2c1b7
AV		 2255 if (dentry->d_inode != NULL)
2256 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2257
3efb9722 2258 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2259 if (status != 0)
14c43f76 2260 goto err_free_label;
3efb9722 2261 state = ctx->state;
6168f62c 2262
549b19cc
TM		 2263 if ((opendata->o_arg.open_flags & O_EXCL) &&
2264 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2265 nfs4_exclusive_attrset(opendata, sattr);
2266
2267 nfs_fattr_init(opendata->o_res.f_attr);
2268 status = nfs4_do_setattr(state->inode, cred,
2269 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2270 state, label, olabel);
2271 if (status == 0) {
0ab64e0e 2272 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2273 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2274 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2275 }
0ab64e0e 2276 }
5bc2afc2
TM		 2277 if (opendata->file_created)
2278 *opened |= FILE_CREATED;
82be417a
AA		 2279
2280 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2281 *ctx_th = opendata->f_attr.mdsthreshold;
2282 else
2283 kfree(opendata->f_attr.mdsthreshold);
2284 opendata->f_attr.mdsthreshold = NULL;
2285
14c43f76
DQ		 2286 nfs4_label_free(olabel);
2287
c6d00e63 2288 nfs4_opendata_put(opendata);
1da177e4 2289 nfs4_put_state_owner(sp);
1da177e4 2290 return 0;
14c43f76
DQ		 2291err_free_label:
2292 nfs4_label_free(olabel);
c6d00e63 2293err_opendata_put:
82be417a 2294 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2295 nfs4_opendata_put(opendata);
e56e0b78
TM		 2296err_put_state_owner:
2297 nfs4_put_state_owner(sp);
1da177e4 2298out_err:
1da177e4
LT		 2299 return status;
2300}
2301
2302
82be417a 2303static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2304 struct nfs_open_context *ctx,
82be417a
AA		 2305 int flags,
2306 struct iattr *sattr,
5bc2afc2
TM		 2307 struct nfs4_label *label,
2308 int *opened)
1da177e4 2309{
49f9a0fa 2310 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2311 struct nfs4_exception exception = { };
2312 struct nfs4_state *res;
2313 int status;
2314
2315 do {
5bc2afc2 2316 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2317 res = ctx->state;
42113a75 2318 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2319 if (status == 0)
2320 break;
2321 /* NOTE: BAD_SEQID means the server and client disagree about the
2322 * book-keeping w.r.t. state-changing operations
2323 * (OPEN/CLOSE/LOCK/LOCKU...)
2324 * It is actually a sign of a bug on the client or on the server.
2325 *
2326 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2327 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2328 * have unhashed the old state_owner for us, and that we can
2329 * therefore safely retry using a new one. We should still warn
2330 * the user though...
2331 */
2332 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2333 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2334 " returned a bad sequence-id error!\n",
2335 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2336 exception.retry = 1;
2337 continue;
2338 }
550f5747
TM		 2339 /*
2340 * BAD_STATEID on OPEN means that the server cancelled our
2341 * state before it received the OPEN_CONFIRM.
2342 * Recover by retrying the request as per the discussion
2343 * on Page 181 of RFC3530.
2344 */
2345 if (status == -NFS4ERR_BAD_STATEID) {
2346 exception.retry = 1;
2347 continue;
2348 }
aac00a8d
TM		 2349 if (status == -EAGAIN) {
2350 /* We must have found a delegation */
2351 exception.retry = 1;
2352 continue;
2353 }
49f9a0fa
TM		 2354 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2355 continue;
2356 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2357 status, &exception));
2358 } while (exception.retry);
2359 return res;
2360}
2361
659bfcd6
TM		 2362static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2363 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2364 struct nfs4_state *state, struct nfs4_label *ilabel,
2365 struct nfs4_label *olabel)
1da177e4 2366{
3e4f6290 2367 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2368 struct nfs_setattrargs arg = {
3e4f6290 2369 .fh = NFS_FH(inode),
1da177e4
LT		 2370 .iap = sattr,
2371 .server = server,
2372 .bitmask = server->attr_bitmask,
1775fd3e 2373 .label = ilabel,
1da177e4
LT		 2374 };
2375 struct nfs_setattrres res = {
2376 .fattr = fattr,
1775fd3e 2377 .label = olabel,
1da177e4
LT		 2378 .server = server,
2379 };
2380 struct rpc_message msg = {
659bfcd6
TM		 2381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2382 .rpc_argp = &arg,
2383 .rpc_resp = &res,
2384 .rpc_cred = cred,
1da177e4 2385 };
26e976a8 2386 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2387 fmode_t fmode;
2388 bool truncate;
65e4308d 2389 int status;
1da177e4 2390
aa9c2669
DQ		 2391 arg.bitmask = nfs4_bitmask(server, ilabel);
2392 if (ilabel)
2393 arg.bitmask = nfs4_bitmask(server, olabel);
2394
0e574af1 2395 nfs_fattr_init(fattr);
1da177e4 2396
ee3ae84e
TM		 2397 /* Servers should only apply open mode checks for file size changes */
2398 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2399 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2400
2401 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2402 /* Use that stateid */
2403 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2404 struct nfs_lockowner lockowner = {
2405 .l_owner = current->files,
2406 .l_pid = current->tgid,
2407 };
4fc8796d 2408 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2409 &lockowner);
08e9eac4 2410 } else
f597c537 2411 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2412
7c513058 2413 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2414 if (status == 0 && state != NULL)
2415 renew_lease(server, timestamp);
65e4308d 2416 return status;
1da177e4
LT		 2417}
2418
659bfcd6
TM		 2419static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2420 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2421 struct nfs4_state *state, struct nfs4_label *ilabel,
2422 struct nfs4_label *olabel)
1da177e4 2423{
3e4f6290 2424 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2425 struct nfs4_exception exception = {
2426 .state = state,
3114ea7a 2427 .inode = inode,
a1d0b5ee 2428 };
1da177e4
LT		 2429 int err;
2430 do {
1775fd3e 2431 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2432 trace_nfs4_setattr(inode, err);
451146be
TM		 2433 switch (err) {
2434 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2435 if (!(sattr->ia_valid & ATTR_SIZE)) {
2436 pr_warn_once("NFSv4: server %s is incorrectly "
2437 "applying open mode checks to "
2438 "a SETATTR that is not "
2439 "changing file size.\n",
2440 server->nfs_client->cl_hostname);
2441 }
451146be
TM		 2442 if (state && !(state->state & FMODE_WRITE)) {
2443 err = -EBADF;
2444 if (sattr->ia_valid & ATTR_OPEN)
2445 err = -EACCES;
2446 goto out;
2447 }
2448 }
2449 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2450 } while (exception.retry);
451146be 2451out:
1da177e4
LT		 2452 return err;
2453}
2454
2455struct nfs4_closedata {
2456 struct inode *inode;
2457 struct nfs4_state *state;
2458 struct nfs_closeargs arg;
2459 struct nfs_closeres res;
516a6af6 2460 struct nfs_fattr fattr;
26e976a8 2461 unsigned long timestamp;
f7e8917a
FI		 2462 bool roc;
2463 u32 roc_barrier;
1da177e4
LT		 2464};
2465
963d8fe5 2466static void nfs4_free_closedata(void *data)
9512135d 2467{
963d8fe5
TM		 2468 struct nfs4_closedata *calldata = data;
2469 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2470 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2471
f7e8917a
FI		 2472 if (calldata->roc)
2473 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2474 nfs4_put_open_state(calldata->state);
2475 nfs_free_seqid(calldata->arg.seqid);
9512135d 2476 nfs4_put_state_owner(sp);
322b2b90 2477 nfs_sb_deactive(sb);
9512135d
TM		 2478 kfree(calldata);
2479}
2480
88069f77
TM		 2481static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2482 fmode_t fmode)
2483{
2484 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2485 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2486 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2487 case FMODE_WRITE:
88069f77 2488 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2489 break;
2490 case FMODE_READ:
88069f77 2491 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2492 break;
2493 case 0:
2494 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2495 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2496 clear_bit(NFS_OPEN_STATE, &state->flags);
2497 }
88069f77
TM		 2498 spin_unlock(&state->owner->so_lock);
2499}
2500
963d8fe5 2501static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2502{
963d8fe5 2503 struct nfs4_closedata *calldata = data;
1da177e4 2504 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2505 struct nfs_server *server = NFS_SERVER(calldata->inode);
2506
a3ca5651 2507 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2508 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2509 return;
42113a75 2510 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2511 /* hmm. we are done with the inode, and in the process of freeing
2512 * the state_owner. we keep this around to process errors
2513 */
1da177e4
LT		 2514 switch (task->tk_status) {
2515 case 0:
f7e8917a
FI		 2516 if (calldata->roc)
2517 pnfs_roc_set_barrier(state->inode,
2518 calldata->roc_barrier);
45328c35 2519 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2520 renew_lease(server, calldata->timestamp);
1da177e4 2521 break;
69794ad7 2522 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2523 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2524 case -NFS4ERR_OLD_STATEID:
2525 case -NFS4ERR_BAD_STATEID:
1da177e4 2526 case -NFS4ERR_EXPIRED:
dc0b027d 2527 if (calldata->arg.fmode == 0)
9e33bed5 2528 break;
1da177e4 2529 default:
69794ad7 2530 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2531 rpc_restart_call_prepare(task);
69794ad7
TM		 2532 goto out_release;
2533 }
1da177e4 2534 }
69794ad7
TM		 2535 nfs4_close_clear_stateid_flags(state, calldata->arg.fmode);
2536out_release:
72211dbe 2537 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2538 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2539 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2540}
2541
4ce70ada 2542static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2543{
4ce70ada 2544 struct nfs4_closedata *calldata = data;
9512135d 2545 struct nfs4_state *state = calldata->state;
7fdab069 2546 struct inode *inode = calldata->inode;
88069f77 2547 int call_close = 0;
9512135d 2548
a3ca5651 2549 dprintk("%s: begin!\n", __func__);
963d8fe5 2550 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2551 goto out_wait;
003707c7 2552
88069f77
TM		 2553 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2554 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2555 spin_lock(&state->owner->so_lock);
003707c7 2556 /* Calculate the change in open mode */
e7616923 2557 if (state->n_rdwr == 0) {
003707c7 2558 if (state->n_rdonly == 0) {
88069f77
TM		 2559 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2560 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2561 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2562 }
2563 if (state->n_wronly == 0) {
88069f77
TM		 2564 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2565 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2566 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2567 }
e7616923 2568 }
5d422301
TM		 2569 if (!nfs4_valid_open_stateid(state))
2570 call_close = 0;
4cecb76f 2571 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2572
2573 if (!call_close) {
963d8fe5 2574 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2575 goto out_no_action;
9512135d 2576 }
88069f77 2577
f7e8917a 2578 if (calldata->arg.fmode == 0) {
88069f77 2579 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2580 if (calldata->roc &&
b9536ad5
AA		 2581 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2582 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2583 goto out_wait;
b9536ad5 2584 }
f7e8917a 2585 }
88069f77 2586
516a6af6 2587 nfs_fattr_init(calldata->res.fattr);
26e976a8 2588 calldata->timestamp = jiffies;
7fdab069 2589 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2590 &calldata->arg.seq_args,
2591 &calldata->res.seq_res,
2240a9e2
TM		 2592 task) != 0)
2593 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2594 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2595 return;
2596out_no_action:
2597 task->tk_action = NULL;
2598out_wait:
2599 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2600}
2601
963d8fe5 2602static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2603 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2604 .rpc_call_done = nfs4_close_done,
2605 .rpc_release = nfs4_free_closedata,
2606};
2607
1da177e4
LT		 2608/*
2609 * It is possible for data to be read/written from a mem-mapped file
2610 * after the sys_close call (which hits the vfs layer as a flush).
2611 * This means that we can't safely call nfsv4 close on a file until
2612 * the inode is cleared. This in turn means that we are not good
2613 * NFSv4 citizens - we do not indicate to the server to update the file's
2614 * share state even when we are done with one of the three share
2615 * stateid's in the inode.
2616 *
2617 * NOTE: Caller must be holding the sp->so_owner semaphore!
2618 */
1f7977c1 2619int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2620{
4a35bd41 2621 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2622 struct nfs4_closedata *calldata;
b39e625b
TM		 2623 struct nfs4_state_owner *sp = state->owner;
2624 struct rpc_task *task;
5138fde0
TM		 2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2627 .rpc_cred = state->owner->so_cred,
2628 };
c970aa85
TM		 2629 struct rpc_task_setup task_setup_data = {
2630 .rpc_client = server->client,
5138fde0 2631 .rpc_message = &msg,
c970aa85 2632 .callback_ops = &nfs4_close_ops,
101070ca 2633 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2634 .flags = RPC_TASK_ASYNC,
2635 };
9512135d 2636 int status = -ENOMEM;
1da177e4 2637
fa940720
WAA		 2638 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2639 &task_setup_data.rpc_client, &msg);
2640
8535b2be 2641 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2642 if (calldata == NULL)
9512135d 2643 goto out;
a9c92d6b 2644 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2645 calldata->inode = state->inode;
1da177e4 2646 calldata->state = state;
4a35bd41 2647 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2648 calldata->arg.stateid = &state->open_stateid;
1da177e4 2649 /* Serialization for the sequence id */
8535b2be 2650 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2651 if (calldata->arg.seqid == NULL)
2652 goto out_free_calldata;
dc0b027d 2653 calldata->arg.fmode = 0;
a65318bf 2654 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2655 calldata->res.fattr = &calldata->fattr;
c1d51931 2656 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2657 calldata->res.server = server;
1f7977c1 2658 calldata->roc = pnfs_roc(state->inode);
643168c2 2659 nfs_sb_active(calldata->inode->i_sb);
9512135d 2660
1174dd1f
TM		 2661 msg.rpc_argp = &calldata->arg;
2662 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2663 task_setup_data.callback_data = calldata;
2664 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2665 if (IS_ERR(task))
2666 return PTR_ERR(task);
a49c3c77
TM		 2667 status = 0;
2668 if (wait)
2669 status = rpc_wait_for_completion_task(task);
b39e625b 2670 rpc_put_task(task);
a49c3c77 2671 return status;
9512135d
TM		 2672out_free_calldata:
2673 kfree(calldata);
2674out:
b39e625b
TM		 2675 nfs4_put_open_state(state);
2676 nfs4_put_state_owner(sp);
9512135d 2677 return status;
1da177e4
LT		 2678}
2679
2b484297 2680static struct inode *
5bc2afc2
TM		 2681nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2682 int open_flags, struct iattr *attr, int *opened)
1da177e4 2683{
1da177e4 2684 struct nfs4_state *state;
aa9c2669
DQ		 2685 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2686
2687 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2688
565277f6 2689 /* Protect against concurrent sillydeletes */
5bc2afc2 2690 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2691
2692 nfs4_label_release_security(label);
2693
f46e0bd3
TM		 2694 if (IS_ERR(state))
2695 return ERR_CAST(state);
275bb307 2696 return state->inode;
1da177e4
LT		 2697}
2698
1185a552 2699static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2700{
2701 if (ctx->state == NULL)
2702 return;
2703 if (is_sync)
643168c2 2704 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2705 else
643168c2 2706 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2707}
1da177e4 2708
b944dba3
TM		 2709#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2710#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2711#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
2712
1da177e4
LT		 2713static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2714{
43652ad5
BH		 2715 struct nfs4_server_caps_arg args = {
2716 .fhandle = fhandle,
2717 };
1da177e4
LT		 2718 struct nfs4_server_caps_res res = {};
2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2721 .rpc_argp = &args,
1da177e4
LT		 2722 .rpc_resp = &res,
2723 };
2724 int status;
2725
7c513058 2726 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2727 if (status == 0) {
b944dba3
TM		 2728 /* Sanity check the server answers */
2729 switch (server->nfs_client->cl_minorversion) {
2730 case 0:
2731 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2732 res.attr_bitmask[2] = 0;
2733 break;
2734 case 1:
2735 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2736 break;
2737 case 2:
2738 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2739 }
1da177e4 2740 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2741 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2742 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2743 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2744 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2745 NFS_CAP_CTIME|NFS_CAP_MTIME|
2746 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2747 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2748 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2749 server->caps |= NFS_CAP_ACLS;
2750 if (res.has_links != 0)
2751 server->caps |= NFS_CAP_HARDLINKS;
2752 if (res.has_symlinks != 0)
2753 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2754 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2755 server->caps |= NFS_CAP_FILEID;
2756 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2757 server->caps |= NFS_CAP_MODE;
2758 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2759 server->caps |= NFS_CAP_NLINK;
2760 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2761 server->caps |= NFS_CAP_OWNER;
2762 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2763 server->caps |= NFS_CAP_OWNER_GROUP;
2764 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2765 server->caps |= NFS_CAP_ATIME;
2766 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2767 server->caps |= NFS_CAP_CTIME;
2768 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2769 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2770#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2771 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2772 server->caps |= NFS_CAP_SECURITY_LABEL;
2773#endif
2774 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2775 sizeof(server->attr_bitmask));
b944dba3 2776 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2777
a65318bf
TM		 2778 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2779 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2780 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2781 server->cache_consistency_bitmask[2] = 0;
1da177e4 2782 server->acl_bitmask = res.acl_bitmask;
264e6351 2783 server->fh_expire_type = res.fh_expire_type;
1da177e4 2784 }
cccef3b9 2785
1da177e4
LT		 2786 return status;
2787}
2788
55a97593 2789int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2790{
2791 struct nfs4_exception exception = { };
2792 int err;
2793 do {
2794 err = nfs4_handle_exception(server,
2795 _nfs4_server_capabilities(server, fhandle),
2796 &exception);
2797 } while (exception.retry);
2798 return err;
2799}
2800
2801static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2802 struct nfs_fsinfo *info)
2803{
aa9c2669 2804 u32 bitmask[3];
1da177e4 2805 struct nfs4_lookup_root_arg args = {
aa9c2669 2806 .bitmask = bitmask,
1da177e4
LT		 2807 };
2808 struct nfs4_lookup_res res = {
2809 .server = server,
0e574af1 2810 .fattr = info->fattr,
1da177e4
LT		 2811 .fh = fhandle,
2812 };
2813 struct rpc_message msg = {
2814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2815 .rpc_argp = &args,
2816 .rpc_resp = &res,
2817 };
008f55d0 2818
aa9c2669
DQ		 2819 bitmask[0] = nfs4_fattr_bitmap[0];
2820 bitmask[1] = nfs4_fattr_bitmap[1];
2821 /*
2822 * Process the label in the upcoming getfattr
2823 */
2824 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2825
0e574af1 2826 nfs_fattr_init(info->fattr);
7c513058 2827 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2828}
2829
2830static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2831 struct nfs_fsinfo *info)
2832{
2833 struct nfs4_exception exception = { };
2834 int err;
2835 do {
fb8a5ba8 2836 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2837 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2838 switch (err) {
2839 case 0:
2840 case -NFS4ERR_WRONGSEC:
05e9cfb4 2841 goto out;
fb8a5ba8
BS		 2842 default:
2843 err = nfs4_handle_exception(server, err, &exception);
2844 }
1da177e4 2845 } while (exception.retry);
05e9cfb4 2846out:
1da177e4
LT		 2847 return err;
2848}
2849
8f70e95f
BS		 2850static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2851 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2852{
c2190661
TM		 2853 struct rpc_auth_create_args auth_args = {
2854 .pseudoflavor = flavor,
2855 };
8f70e95f
BS		 2856 struct rpc_auth *auth;
2857 int ret;
2858
c2190661 2859 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2860 if (IS_ERR(auth)) {
75bc8821 2861 ret = -EACCES;
8f70e95f
BS		 2862 goto out;
2863 }
2864 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2865out:
2866 return ret;
2867}
2868
9a744ba3
CL		 2869/*
2870 * Retry pseudoroot lookup with various security flavors. We do this when:
2871 *
2872 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2873 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2874 *
2875 * Returns zero on success, or a negative NFS4ERR value, or a
2876 * negative errno value.
2877 */
801a16dc 2878static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2879 struct nfs_fsinfo *info)
1da177e4 2880{
9a744ba3
CL		 2881 /* Per 3530bis 15.33.5 */
2882 static const rpc_authflavor_t flav_array[] = {
2883 RPC_AUTH_GSS_KRB5P,
2884 RPC_AUTH_GSS_KRB5I,
2885 RPC_AUTH_GSS_KRB5,
c4eafe11 2886 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2887 RPC_AUTH_NULL,
2888 };
2889 int status = -EPERM;
2890 size_t i;
6a1a1e34 2891
4d4b69dd
WAA		 2892 if (server->auth_info.flavor_len > 0) {
2893 /* try each flavor specified by user */
2894 for (i = 0; i < server->auth_info.flavor_len; i++) {
2895 status = nfs4_lookup_root_sec(server, fhandle, info,
2896 server->auth_info.flavors[i]);
2897 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2898 continue;
2899 break;
2900 }
2901 } else {
2902 /* no flavors specified by user, try default list */
2903 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2904 status = nfs4_lookup_root_sec(server, fhandle, info,
2905 flav_array[i]);
2906 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2907 continue;
2908 break;
2909 }
8f70e95f 2910 }
9a744ba3 2911
fb8a5ba8
BS		 2912 /*
2913 * -EACCESS could mean that the user doesn't have correct permissions
2914 * to access the mount. It could also mean that we tried to mount
2915 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2916 * existing mount programs don't handle -EACCES very well so it should
2917 * be mapped to -EPERM instead.
2918 */
2919 if (status == -EACCES)
2920 status = -EPERM;
801a16dc
BS		 2921 return status;
2922}
2923
2ed4b95b
CL		 2924static int nfs4_do_find_root_sec(struct nfs_server *server,
2925 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2926{
2927 int mv = server->nfs_client->cl_minorversion;
2928 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2929}
2930
2931/**
2932 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2933 * @server: initialized nfs_server handle
2934 * @fhandle: we fill in the pseudo-fs root file handle
2935 * @info: we fill in an FSINFO struct
5e6b1990 2936 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2937 *
2938 * Returns zero on success, or a negative errno.
801a16dc 2939 */
3028eb2b 2940int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2941 struct nfs_fsinfo *info,
2942 bool auth_probe)
801a16dc 2943{
2ed4b95b
CL		 2944 int status;
2945
5e6b1990
TM		 2946 switch (auth_probe) {
2947 case false:
2948 status = nfs4_lookup_root(server, fhandle, info);
2949 if (status != -NFS4ERR_WRONGSEC)
2950 break;
5e6b1990 2951 default:
2ed4b95b 2952 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2953 }
2ed4b95b 2954
1da177e4
LT		 2955 if (status == 0)
2956 status = nfs4_server_capabilities(server, fhandle);
2957 if (status == 0)
2958 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2959
c12e87f4 2960 return nfs4_map_errors(status);
1da177e4
LT		 2961}
2962
bae36241
BS		 2963static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2964 struct nfs_fsinfo *info)
2965{
2966 int error;
2967 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2968 struct nfs4_label *label = NULL;
bae36241
BS		 2969
2970 error = nfs4_server_capabilities(server, mntfh);
2971 if (error < 0) {
2972 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2973 return error;
2974 }
2975
14c43f76
DQ		 2976 label = nfs4_label_alloc(server, GFP_KERNEL);
2977 if (IS_ERR(label))
2978 return PTR_ERR(label);
2979
1775fd3e 2980 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2981 if (error < 0) {
2982 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2983 goto err_free_label;
bae36241
BS		 2984 }
2985
2986 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2987 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2988 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2989
14c43f76
DQ		 2990err_free_label:
2991 nfs4_label_free(label);
2992
bae36241
BS		 2993 return error;
2994}
2995
6b97fd3d
MN		 2996/*
2997 * Get locations and (maybe) other attributes of a referral.
2998 * Note that we'll actually follow the referral later when
2999 * we detect fsid mismatch in inode revalidation
3000 */
f05d147f
BS		 3001static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3002 const struct qstr *name, struct nfs_fattr *fattr,
3003 struct nfs_fh *fhandle)
6b97fd3d
MN		 3004{
3005 int status = -ENOMEM;
3006 struct page *page = NULL;
3007 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3008
3009 page = alloc_page(GFP_KERNEL);
3010 if (page == NULL)
3011 goto out;
3012 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3013 if (locations == NULL)
3014 goto out;
3015
f05d147f 3016 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3017 if (status != 0)
3018 goto out;
519ae255
CL		 3019
3020 /*
3021 * If the fsid didn't change, this is a migration event, not a
3022 * referral. Cause us to drop into the exception handler, which
3023 * will kick off migration recovery.
3024 */
6b97fd3d 3025 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3026 dprintk("%s: server did not return a different fsid for"
3027 " a referral at %s\n", __func__, name->name);
519ae255 3028 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3029 goto out;
3030 }
533eb461
AA		 3031 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3032 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3033
533eb461 3034 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3035 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3036 memset(fhandle, 0, sizeof(struct nfs_fh));
3037out:
3038 if (page)
3039 __free_page(page);
5d7ca35a 3040 kfree(locations);
6b97fd3d
MN		 3041 return status;
3042}
3043
1775fd3e
DQ		 3044static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3045 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3046{
3047 struct nfs4_getattr_arg args = {
3048 .fh = fhandle,
3049 .bitmask = server->attr_bitmask,
3050 };
3051 struct nfs4_getattr_res res = {
3052 .fattr = fattr,
1775fd3e 3053 .label = label,
1da177e4
LT		 3054 .server = server,
3055 };
3056 struct rpc_message msg = {
3057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3058 .rpc_argp = &args,
3059 .rpc_resp = &res,
3060 };
aa9c2669
DQ		 3061
3062 args.bitmask = nfs4_bitmask(server, label);
3063
0e574af1 3064 nfs_fattr_init(fattr);
7c513058 3065 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3066}
3067
1775fd3e
DQ		 3068static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3069 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3070{
3071 struct nfs4_exception exception = { };
3072 int err;
3073 do {
b5f875a9
TM		 3074 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3075 trace_nfs4_getattr(server, fhandle, fattr, err);
3076 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3077 &exception);
3078 } while (exception.retry);
3079 return err;
3080}
3081
3082/*
3083 * The file is not closed if it is opened due to the a request to change
3084 * the size of the file. The open call will not be needed once the
3085 * VFS layer lookup-intents are implemented.
3086 *
3087 * Close is called when the inode is destroyed.
3088 * If we haven't opened the file for O_WRONLY, we
3089 * need to in the size_change case to obtain a stateid.
3090 *
3091 * Got race?
3092 * Because OPEN is always done by name in nfsv4, it is
3093 * possible that we opened a different file by the same
3094 * name. We can recognize this race condition, but we
3095 * can't do anything about it besides returning an error.
3096 *
3097 * This will be fixed with VFS changes (lookup-intent).
3098 */
3099static int
3100nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3101 struct iattr *sattr)
3102{
08e9eac4 3103 struct inode *inode = dentry->d_inode;
659bfcd6 3104 struct rpc_cred *cred = NULL;
d530838b 3105 struct nfs4_state *state = NULL;
14c43f76 3106 struct nfs4_label *label = NULL;
1da177e4
LT		 3107 int status;
3108
8a1636c4 3109 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3110 pnfs_commit_and_return_layout(inode);
8a1636c4 3111
0e574af1 3112 nfs_fattr_init(fattr);
1da177e4 3113
2669940d
AA		 3114 /* Deal with open(O_TRUNC) */
3115 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3116 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3117
3118 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3119 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3120 return 0;
3121
d530838b 3122 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3123 if (sattr->ia_valid & ATTR_FILE) {
3124 struct nfs_open_context *ctx;
3125
3126 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3127 if (ctx) {
3128 cred = ctx->cred;
3129 state = ctx->state;
3130 }
659bfcd6 3131 }
08e9eac4 3132
14c43f76
DQ		 3133 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3134 if (IS_ERR(label))
3135 return PTR_ERR(label);
3136
3137 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3138 if (status == 0) {
65e4308d 3139 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3140 nfs_setsecurity(inode, fattr, label);
3141 }
14c43f76 3142 nfs4_label_free(label);
1da177e4
LT		 3143 return status;
3144}
3145
0c2e53f1
TM		 3146static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3147 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3148 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3149{
0c2e53f1 3150 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3151 int status;
3152 struct nfs4_lookup_arg args = {
3153 .bitmask = server->attr_bitmask,
0c2e53f1 3154 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3155 .name = name,
3156 };
3157 struct nfs4_lookup_res res = {
3158 .server = server,
3159 .fattr = fattr,
aa9c2669 3160 .label = label,
2b3de441
DH		 3161 .fh = fhandle,
3162 };
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3165 .rpc_argp = &args,
3166 .rpc_resp = &res,
3167 };
3168
aa9c2669
DQ		 3169 args.bitmask = nfs4_bitmask(server, label);
3170
2b3de441
DH		 3171 nfs_fattr_init(fattr);
3172
1da177e4 3173 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3174 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3175 dprintk("NFS reply lookup: %d\n", status);
3176 return status;
3177}
3178
72de53ec 3179static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3180{
7ebb9315 3181 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3182 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3183 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3184 fattr->nlink = 2;
3185}
3186
72de53ec
BS		 3187static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3188 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3189 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3190{
3191 struct nfs4_exception exception = { };
72de53ec 3192 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3193 int err;
3194 do {
1775fd3e 3195 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3196 trace_nfs4_lookup(dir, name, err);
72de53ec 3197 switch (err) {
08ef7bd3 3198 case -NFS4ERR_BADNAME:
72de53ec
BS		 3199 err = -ENOENT;
3200 goto out;
0c2e53f1 3201 case -NFS4ERR_MOVED:
f05d147f 3202 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3203 goto out;
0c2e53f1 3204 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3205 err = -EPERM;
3206 if (client != *clnt)
3207 goto out;
72de53ec
BS		 3208 client = nfs4_create_sec_client(client, dir, name);
3209 if (IS_ERR(client))
3210 return PTR_ERR(client);
3211
3212 exception.retry = 1;
3213 break;
3214 default:
3215 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3216 }
1da177e4 3217 } while (exception.retry);
72de53ec
BS		 3218
3219out:
3220 if (err == 0)
3221 *clnt = client;
3222 else if (client != *clnt)
3223 rpc_shutdown_client(client);
3224
1da177e4
LT		 3225 return err;
3226}
3227
80a16b21 3228static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3229 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3230 struct nfs4_label *label)
72de53ec
BS		 3231{
3232 int status;
3233 struct rpc_clnt *client = NFS_CLIENT(dir);
3234
1775fd3e 3235 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3236 if (client != NFS_CLIENT(dir)) {
3237 rpc_shutdown_client(client);
3238 nfs_fixup_secinfo_attributes(fattr);
3239 }
3240 return status;
3241}
3242
f05d147f
BS		 3243struct rpc_clnt *
3244nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3245 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3246{
b72888cb 3247 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3248 int status;
f05d147f 3249
1775fd3e 3250 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3251 if (status < 0)
f05d147f 3252 return ERR_PTR(status);
b72888cb 3253 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3254}
3255
1da177e4
LT		 3256static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3257{
76b32999 3258 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3259 struct nfs4_accessargs args = {
3260 .fh = NFS_FH(inode),
a4980e78 3261 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3262 };
3263 struct nfs4_accessres res = {
3264 .server = server,
1da177e4 3265 };
1da177e4
LT		 3266 struct rpc_message msg = {
3267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3268 .rpc_argp = &args,
3269 .rpc_resp = &res,
3270 .rpc_cred = entry->cred,
3271 };
3272 int mode = entry->mask;
aa9c2669 3273 int status = 0;
1da177e4
LT		 3274
3275 /*
3276 * Determine which access bits we want to ask for...
3277 */
3278 if (mode & MAY_READ)
3279 args.access |= NFS4_ACCESS_READ;
3280 if (S_ISDIR(inode->i_mode)) {
3281 if (mode & MAY_WRITE)
3282 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3283 if (mode & MAY_EXEC)
3284 args.access |= NFS4_ACCESS_LOOKUP;
3285 } else {
3286 if (mode & MAY_WRITE)
3287 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3288 if (mode & MAY_EXEC)
3289 args.access |= NFS4_ACCESS_EXECUTE;
3290 }
c407d41a
TM		 3291
3292 res.fattr = nfs_alloc_fattr();
3293 if (res.fattr == NULL)
3294 return -ENOMEM;
3295
7c513058 3296 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3297 if (!status) {
6168f62c 3298 nfs_access_set_mask(entry, res.access);
c407d41a 3299 nfs_refresh_inode(inode, res.fattr);
1da177e4 3300 }
c407d41a 3301 nfs_free_fattr(res.fattr);
1da177e4
LT		 3302 return status;
3303}
3304
3305static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3306{
3307 struct nfs4_exception exception = { };
3308 int err;
3309 do {
c1578b76
TM		 3310 err = _nfs4_proc_access(inode, entry);
3311 trace_nfs4_access(inode, err);
3312 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3313 &exception);
3314 } while (exception.retry);
3315 return err;
3316}
3317
3318/*
3319 * TODO: For the time being, we don't try to get any attributes
3320 * along with any of the zero-copy operations READ, READDIR,
3321 * READLINK, WRITE.
3322 *
3323 * In the case of the first three, we want to put the GETATTR
3324 * after the read-type operation -- this is because it is hard
3325 * to predict the length of a GETATTR response in v4, and thus
3326 * align the READ data correctly. This means that the GETATTR
3327 * may end up partially falling into the page cache, and we should
3328 * shift it into the 'tail' of the xdr_buf before processing.
3329 * To do this efficiently, we need to know the total length
3330 * of data received, which doesn't seem to be available outside
3331 * of the RPC layer.
3332 *
3333 * In the case of WRITE, we also want to put the GETATTR after
3334 * the operation -- in this case because we want to make sure
140150db 3335 * we get the post-operation mtime and size.
1da177e4
LT		 3336 *
3337 * Both of these changes to the XDR layer would in fact be quite
3338 * minor, but I decided to leave them for a subsequent patch.
3339 */
3340static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3341 unsigned int pgbase, unsigned int pglen)
3342{
3343 struct nfs4_readlink args = {
3344 .fh = NFS_FH(inode),
3345 .pgbase = pgbase,
3346 .pglen = pglen,
3347 .pages = &page,
3348 };
f50c7000 3349 struct nfs4_readlink_res res;
1da177e4
LT		 3350 struct rpc_message msg = {
3351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3352 .rpc_argp = &args,
f50c7000 3353 .rpc_resp = &res,
1da177e4
LT		 3354 };
3355
7c513058 3356 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3357}
3358
3359static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3360 unsigned int pgbase, unsigned int pglen)
3361{
3362 struct nfs4_exception exception = { };
3363 int err;
3364 do {
c1578b76
TM		 3365 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3366 trace_nfs4_readlink(inode, err);
3367 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3368 &exception);
3369 } while (exception.retry);
3370 return err;
3371}
3372
1da177e4 3373/*
8867fe58 3374 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3375 */
1da177e4
LT		 3376static int
3377nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3378 int flags)
1da177e4 3379{
aa9c2669 3380 struct nfs4_label l, *ilabel = NULL;
8867fe58 3381 struct nfs_open_context *ctx;
1da177e4 3382 struct nfs4_state *state;
5bc2afc2 3383 int opened = 0;
1da177e4
LT		 3384 int status = 0;
3385
8867fe58
MS		 3386 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3387 if (IS_ERR(ctx))
3388 return PTR_ERR(ctx);
3389
aa9c2669
DQ		 3390 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3391
a8a5da99 3392 sattr->ia_mode &= ~current_umask();
5bc2afc2 3393 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3394 if (IS_ERR(state)) {
3395 status = PTR_ERR(state);
c0204fd2 3396 goto out;
1da177e4 3397 }
1da177e4 3398out:
aa9c2669 3399 nfs4_label_release_security(ilabel);
8867fe58 3400 put_nfs_open_context(ctx);
1da177e4
LT		 3401 return status;
3402}
3403
3404static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3405{
16e42959 3406 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3407 struct nfs_removeargs args = {
1da177e4 3408 .fh = NFS_FH(dir),
26fe5750 3409 .name = *name,
16e42959 3410 };
4fdc17b2 3411 struct nfs_removeres res = {
16e42959 3412 .server = server,
1da177e4 3413 };
1da177e4 3414 struct rpc_message msg = {
4fdc17b2
TM		 3415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3416 .rpc_argp = &args,
3417 .rpc_resp = &res,
1da177e4 3418 };
778d2817 3419 int status;
1da177e4 3420
7c513058 3421 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3422 if (status == 0)
16e42959 3423 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3424 return status;
3425}
3426
3427static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3428{
3429 struct nfs4_exception exception = { };
3430 int err;
3431 do {
078ea3df
TM		 3432 err = _nfs4_proc_remove(dir, name);
3433 trace_nfs4_remove(dir, name, err);
3434 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3435 &exception);
3436 } while (exception.retry);
3437 return err;
3438}
3439
e4eff1a6 3440static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3441{
e4eff1a6
TM		 3442 struct nfs_server *server = NFS_SERVER(dir);
3443 struct nfs_removeargs *args = msg->rpc_argp;
3444 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3445
e4eff1a6 3446 res->server = server;
1da177e4 3447 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3448 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3449
3450 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3451}
3452
34e137cc
BS		 3453static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3454{
d9afbd1b
TM		 3455 nfs4_setup_sequence(NFS_SERVER(data->dir),
3456 &data->args.seq_args,
3457 &data->res.seq_res,
3458 task);
1da177e4
LT		 3459}
3460
e4eff1a6 3461static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3462{
078ea3df
TM		 3463 struct nfs_unlinkdata *data = task->tk_calldata;
3464 struct nfs_removeres *res = &data->res;
e4eff1a6 3465
14516c3a
TM		 3466 if (!nfs4_sequence_done(task, &res->seq_res))
3467 return 0;
9e33bed5 3468 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3469 return 0;
3470 update_changeattr(dir, &res->cinfo);
e4eff1a6 3471 return 1;
1da177e4
LT		 3472}
3473
d3d4152a
JL		 3474static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3475{
3476 struct nfs_server *server = NFS_SERVER(dir);
3477 struct nfs_renameargs *arg = msg->rpc_argp;
3478 struct nfs_renameres *res = msg->rpc_resp;
3479
3480 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3481 res->server = server;
a9c92d6b 3482 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3483}
3484
c6bfa1a1
BS		 3485static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3486{
d9afbd1b
TM		 3487 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3488 &data->args.seq_args,
3489 &data->res.seq_res,
3490 task);
d3d4152a
JL		 3491}
3492
3493static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3494 struct inode *new_dir)
3495{
fbc6f7c2
TM		 3496 struct nfs_renamedata *data = task->tk_calldata;
3497 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3498
3499 if (!nfs4_sequence_done(task, &res->seq_res))
3500 return 0;
3501 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3502 return 0;
3503
3504 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3505 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3506 return 1;
3507}
3508
1da177e4
LT		 3509static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3510 struct inode *new_dir, struct qstr *new_name)
3511{
6caf2c82 3512 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3513 struct nfs_renameargs arg = {
1da177e4
LT		 3514 .old_dir = NFS_FH(old_dir),
3515 .new_dir = NFS_FH(new_dir),
3516 .old_name = old_name,
3517 .new_name = new_name,
6caf2c82 3518 };
e8582a8b 3519 struct nfs_renameres res = {
6caf2c82 3520 .server = server,
1da177e4 3521 };
1da177e4
LT		 3522 struct rpc_message msg = {
3523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3524 .rpc_argp = &arg,
3525 .rpc_resp = &res,
3526 };
011fff72 3527 int status = -ENOMEM;
14c43f76 3528
7c513058 3529 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3530 if (!status) {
3531 update_changeattr(old_dir, &res.old_cinfo);
3532 update_changeattr(new_dir, &res.new_cinfo);
3533 }
3534 return status;
3535}
3536
3537static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3538 struct inode *new_dir, struct qstr *new_name)
3539{
3540 struct nfs4_exception exception = { };
3541 int err;
3542 do {
fbc6f7c2
TM		 3543 err = _nfs4_proc_rename(old_dir, old_name,
3544 new_dir, new_name);
3545 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3546 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3547 &exception);
3548 } while (exception.retry);
3549 return err;
3550}
3551
3552static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3553{
91ba2eee 3554 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3555 struct nfs4_link_arg arg = {
3556 .fh = NFS_FH(inode),
3557 .dir_fh = NFS_FH(dir),
3558 .name = name,
91ba2eee
TM		 3559 .bitmask = server->attr_bitmask,
3560 };
91ba2eee
TM		 3561 struct nfs4_link_res res = {
3562 .server = server,
1775fd3e 3563 .label = NULL,
1da177e4 3564 };
1da177e4
LT		 3565 struct rpc_message msg = {
3566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3567 .rpc_argp = &arg,
91ba2eee 3568 .rpc_resp = &res,
1da177e4 3569 };
136f2627
TM		 3570 int status = -ENOMEM;
3571
3572 res.fattr = nfs_alloc_fattr();
778d2817 3573 if (res.fattr == NULL)
136f2627 3574 goto out;
1da177e4 3575
14c43f76
DQ		 3576 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3577 if (IS_ERR(res.label)) {
3578 status = PTR_ERR(res.label);
3579 goto out;
3580 }
aa9c2669 3581 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3582
7c513058 3583 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3584 if (!status) {
3585 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3586 status = nfs_post_op_update_inode(inode, res.fattr);
3587 if (!status)
3588 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3589 }
14c43f76
DQ		 3590
3591
3592 nfs4_label_free(res.label);
3593
136f2627 3594out:
136f2627 3595 nfs_free_fattr(res.fattr);
1da177e4
LT		 3596 return status;
3597}
3598
3599static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3600{
3601 struct nfs4_exception exception = { };
3602 int err;
3603 do {
3604 err = nfs4_handle_exception(NFS_SERVER(inode),
3605 _nfs4_proc_link(inode, dir, name),
3606 &exception);
3607 } while (exception.retry);
3608 return err;
3609}
3610
57dc9a57
TM		 3611struct nfs4_createdata {
3612 struct rpc_message msg;
3613 struct nfs4_create_arg arg;
3614 struct nfs4_create_res res;
3615 struct nfs_fh fh;
3616 struct nfs_fattr fattr;
1775fd3e 3617 struct nfs4_label *label;
57dc9a57
TM		 3618};
3619
3620static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3621 struct qstr *name, struct iattr *sattr, u32 ftype)
3622{
3623 struct nfs4_createdata *data;
3624
3625 data = kzalloc(sizeof(*data), GFP_KERNEL);
3626 if (data != NULL) {
3627 struct nfs_server *server = NFS_SERVER(dir);
3628
14c43f76
DQ		 3629 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3630 if (IS_ERR(data->label))
3631 goto out_free;
3632
57dc9a57
TM		 3633 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3634 data->msg.rpc_argp = &data->arg;
3635 data->msg.rpc_resp = &data->res;
3636 data->arg.dir_fh = NFS_FH(dir);
3637 data->arg.server = server;
3638 data->arg.name = name;
3639 data->arg.attrs = sattr;
3640 data->arg.ftype = ftype;
aa9c2669 3641 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3642 data->res.server = server;
3643 data->res.fh = &data->fh;
3644 data->res.fattr = &data->fattr;
1775fd3e 3645 data->res.label = data->label;
57dc9a57 3646 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3647 }
3648 return data;
14c43f76
DQ		 3649out_free:
3650 kfree(data);
3651 return NULL;
57dc9a57
TM		 3652}
3653
3654static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3655{
7c513058 3656 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3657 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3658 if (status == 0) {
3659 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3660 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3661 }
3662 return status;
3663}
3664
3665static void nfs4_free_createdata(struct nfs4_createdata *data)
3666{
14c43f76 3667 nfs4_label_free(data->label);
57dc9a57
TM		 3668 kfree(data);
3669}
3670
4f390c15 3671static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3672 struct page *page, unsigned int len, struct iattr *sattr,
3673 struct nfs4_label *label)
1da177e4 3674{
57dc9a57
TM		 3675 struct nfs4_createdata *data;
3676 int status = -ENAMETOOLONG;
1da177e4 3677
94a6d753 3678 if (len > NFS4_MAXPATHLEN)
57dc9a57 3679 goto out;
4f390c15 3680
57dc9a57
TM		 3681 status = -ENOMEM;
3682 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3683 if (data == NULL)
3684 goto out;
3685
3686 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3687 data->arg.u.symlink.pages = &page;
3688 data->arg.u.symlink.len = len;
1775fd3e 3689 data->arg.label = label;
1da177e4 3690
57dc9a57
TM		 3691 status = nfs4_do_create(dir, dentry, data);
3692
3693 nfs4_free_createdata(data);
3694out:
1da177e4
LT		 3695 return status;
3696}
3697
4f390c15 3698static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3699 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3700{
3701 struct nfs4_exception exception = { };
aa9c2669 3702 struct nfs4_label l, *label = NULL;
1da177e4 3703 int err;
aa9c2669
DQ		 3704
3705 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3706
1da177e4 3707 do {
078ea3df
TM		 3708 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3709 trace_nfs4_symlink(dir, &dentry->d_name, err);
3710 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3711 &exception);
3712 } while (exception.retry);
aa9c2669
DQ		 3713
3714 nfs4_label_release_security(label);
1da177e4
LT		 3715 return err;
3716}
3717
3718static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3719 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3720{
57dc9a57
TM		 3721 struct nfs4_createdata *data;
3722 int status = -ENOMEM;
1da177e4 3723
57dc9a57
TM		 3724 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3725 if (data == NULL)
3726 goto out;
3727
1775fd3e 3728 data->arg.label = label;
57dc9a57
TM		 3729 status = nfs4_do_create(dir, dentry, data);
3730
3731 nfs4_free_createdata(data);
3732out:
1da177e4
LT		 3733 return status;
3734}
3735
3736static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3737 struct iattr *sattr)
3738{
3739 struct nfs4_exception exception = { };
aa9c2669 3740 struct nfs4_label l, *label = NULL;
1da177e4 3741 int err;
a8a5da99 3742
aa9c2669
DQ		 3743 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3744
a8a5da99 3745 sattr->ia_mode &= ~current_umask();
1da177e4 3746 do {
078ea3df
TM		 3747 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3748 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3749 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3750 &exception);
3751 } while (exception.retry);
aa9c2669
DQ		 3752 nfs4_label_release_security(label);
3753
1da177e4
LT		 3754 return err;
3755}
3756
3757static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3758 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3759{
3760 struct inode *dir = dentry->d_inode;
3761 struct nfs4_readdir_arg args = {
3762 .fh = NFS_FH(dir),
56e4ebf8 3763 .pages = pages,
1da177e4
LT		 3764 .pgbase = 0,
3765 .count = count,
96d25e53 3766 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3767 .plus = plus,
1da177e4
LT		 3768 };
3769 struct nfs4_readdir_res res;
3770 struct rpc_message msg = {
3771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3772 .rpc_argp = &args,
3773 .rpc_resp = &res,
3774 .rpc_cred = cred,
3775 };
3776 int status;
3777
6de1472f
AV		 3778 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3779 dentry,
eadf4598 3780 (unsigned long long)cookie);
c3f52af3 3781 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3782 res.pgbase = args.pgbase;
7c513058 3783 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3784 if (status >= 0) {
c3f52af3 3785 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3786 status += args.pgbase;
3787 }
c4812998
TM		 3788
3789 nfs_invalidate_atime(dir);
3790
3110ff80 3791 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3792 return status;
3793}
3794
3795static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3796 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3797{
3798 struct nfs4_exception exception = { };
3799 int err;
3800 do {
c1578b76
TM		 3801 err = _nfs4_proc_readdir(dentry, cred, cookie,
3802 pages, count, plus);
3803 trace_nfs4_readdir(dentry->d_inode, err);
3804 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3805 &exception);
3806 } while (exception.retry);
3807 return err;
3808}
3809
3810static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3811 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3812{
57dc9a57
TM		 3813 struct nfs4_createdata *data;
3814 int mode = sattr->ia_mode;
3815 int status = -ENOMEM;
1da177e4 3816
57dc9a57
TM		 3817 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3818 if (data == NULL)
3819 goto out;
3820
1da177e4 3821 if (S_ISFIFO(mode))
57dc9a57 3822 data->arg.ftype = NF4FIFO;
1da177e4 3823 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3824 data->arg.ftype = NF4BLK;
3825 data->arg.u.device.specdata1 = MAJOR(rdev);
3826 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3827 }
3828 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3829 data->arg.ftype = NF4CHR;
3830 data->arg.u.device.specdata1 = MAJOR(rdev);
3831 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3832 } else if (!S_ISSOCK(mode)) {
3833 status = -EINVAL;
3834 goto out_free;
1da177e4 3835 }
1775fd3e 3836
aa9c2669 3837 data->arg.label = label;
57dc9a57 3838 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3839out_free:
57dc9a57
TM		 3840 nfs4_free_createdata(data);
3841out:
1da177e4
LT		 3842 return status;
3843}
3844
3845static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3846 struct iattr *sattr, dev_t rdev)
3847{
3848 struct nfs4_exception exception = { };
aa9c2669 3849 struct nfs4_label l, *label = NULL;
1da177e4 3850 int err;
a8a5da99 3851
aa9c2669
DQ		 3852 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3853
a8a5da99 3854 sattr->ia_mode &= ~current_umask();
1da177e4 3855 do {
078ea3df
TM		 3856 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3857 trace_nfs4_mknod(dir, &dentry->d_name, err);
3858 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3859 &exception);
3860 } while (exception.retry);
aa9c2669
DQ		 3861
3862 nfs4_label_release_security(label);
3863
1da177e4
LT		 3864 return err;
3865}
3866
3867static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3868 struct nfs_fsstat *fsstat)
3869{
3870 struct nfs4_statfs_arg args = {
3871 .fh = fhandle,
3872 .bitmask = server->attr_bitmask,
3873 };
24ad148a
BH		 3874 struct nfs4_statfs_res res = {
3875 .fsstat = fsstat,
3876 };
1da177e4
LT		 3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3879 .rpc_argp = &args,
24ad148a 3880 .rpc_resp = &res,
1da177e4
LT		 3881 };
3882
0e574af1 3883 nfs_fattr_init(fsstat->fattr);
7c513058 3884 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3885}
3886
3887static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3888{
3889 struct nfs4_exception exception = { };
3890 int err;
3891 do {
3892 err = nfs4_handle_exception(server,
3893 _nfs4_proc_statfs(server, fhandle, fsstat),
3894 &exception);
3895 } while (exception.retry);
3896 return err;
3897}
3898
3899static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3900 struct nfs_fsinfo *fsinfo)
3901{
3902 struct nfs4_fsinfo_arg args = {
3903 .fh = fhandle,
3904 .bitmask = server->attr_bitmask,
3905 };
3dda5e43
BH		 3906 struct nfs4_fsinfo_res res = {
3907 .fsinfo = fsinfo,
3908 };
1da177e4
LT		 3909 struct rpc_message msg = {
3910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3911 .rpc_argp = &args,
3dda5e43 3912 .rpc_resp = &res,
1da177e4
LT		 3913 };
3914
7c513058 3915 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3916}
3917
3918static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3919{
3920 struct nfs4_exception exception = { };
83ca7f5a 3921 unsigned long now = jiffies;
1da177e4
LT		 3922 int err;
3923
3924 do {
83ca7f5a 3925 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3926 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3927 if (err == 0) {
3928 struct nfs_client *clp = server->nfs_client;
3929
3930 spin_lock(&clp->cl_lock);
3931 clp->cl_lease_time = fsinfo->lease_time * HZ;
3932 clp->cl_last_renewal = now;
3933 spin_unlock(&clp->cl_lock);
3934 break;
3935 }
3936 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3937 } while (exception.retry);
3938 return err;
3939}
3940
3941static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3942{
e38eb650
BS		 3943 int error;
3944
0e574af1 3945 nfs_fattr_init(fsinfo->fattr);
e38eb650 3946 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3947 if (error == 0) {
3948 /* block layout checks this! */
3949 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3950 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3951 }
e38eb650
BS		 3952
3953 return error;
1da177e4
LT		 3954}
3955
3956static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3957 struct nfs_pathconf *pathconf)
3958{
3959 struct nfs4_pathconf_arg args = {
3960 .fh = fhandle,
3961 .bitmask = server->attr_bitmask,
3962 };
d45b2989
BH		 3963 struct nfs4_pathconf_res res = {
3964 .pathconf = pathconf,
3965 };
1da177e4
LT		 3966 struct rpc_message msg = {
3967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3968 .rpc_argp = &args,
d45b2989 3969 .rpc_resp = &res,
1da177e4
LT		 3970 };
3971
3972 /* None of the pathconf attributes are mandatory to implement */
3973 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3974 memset(pathconf, 0, sizeof(*pathconf));
3975 return 0;
3976 }
3977
0e574af1 3978 nfs_fattr_init(pathconf->fattr);
7c513058 3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3980}
3981
3982static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3983 struct nfs_pathconf *pathconf)
3984{
3985 struct nfs4_exception exception = { };
3986 int err;
3987
3988 do {
3989 err = nfs4_handle_exception(server,
3990 _nfs4_proc_pathconf(server, fhandle, pathconf),
3991 &exception);
3992 } while (exception.retry);
3993 return err;
3994}
3995
5521abfd 3996int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3997 const struct nfs_open_context *ctx,
3998 const struct nfs_lock_context *l_ctx,
3999 fmode_t fmode)
4000{
4001 const struct nfs_lockowner *lockowner = NULL;
4002
4003 if (l_ctx != NULL)
4004 lockowner = &l_ctx->lockowner;
5521abfd 4005 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4006}
4007EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4008
5521abfd
TM		 4009static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4010 const struct nfs_open_context *ctx,
4011 const struct nfs_lock_context *l_ctx,
4012 fmode_t fmode)
4013{
4014 nfs4_stateid current_stateid;
4015
4016 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
4017 return false;
4018 return nfs4_stateid_match(stateid, &current_stateid);
4019}
4020
4021static bool nfs4_error_stateid_expired(int err)
4022{
4023 switch (err) {
4024 case -NFS4ERR_DELEG_REVOKED:
4025 case -NFS4ERR_ADMIN_REVOKED:
4026 case -NFS4ERR_BAD_STATEID:
4027 case -NFS4ERR_STALE_STATEID:
4028 case -NFS4ERR_OLD_STATEID:
4029 case -NFS4ERR_OPENMODE:
4030 case -NFS4ERR_EXPIRED:
4031 return true;
4032 }
4033 return false;
4034}
4035
d20581aa
BH		 4036void __nfs4_read_done_cb(struct nfs_read_data *data)
4037{
cd841605 4038 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4039}
4040
cbdabc7f 4041static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4042{
cd841605 4043 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4044
cc668ab3 4045 trace_nfs4_read(data, task->tk_status);
9e33bed5 4046 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4047 rpc_restart_call_prepare(task);
ec06c096 4048 return -EAGAIN;
1da177e4 4049 }
8850df99 4050
d20581aa 4051 __nfs4_read_done_cb(data);
1da177e4 4052 if (task->tk_status > 0)
ec06c096
TM		 4053 renew_lease(server, data->timestamp);
4054 return 0;
1da177e4
LT		 4055}
4056
5521abfd
TM		 4057static bool nfs4_read_stateid_changed(struct rpc_task *task,
4058 struct nfs_readargs *args)
4059{
4060
4061 if (!nfs4_error_stateid_expired(task->tk_status) ||
4062 nfs4_stateid_is_current(&args->stateid,
4063 args->context,
4064 args->lock_context,
4065 FMODE_READ))
4066 return false;
4067 rpc_restart_call_prepare(task);
4068 return true;
4069}
4070
cbdabc7f
AA		 4071static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4072{
4073
4074 dprintk("--> %s\n", __func__);
4075
4076 if (!nfs4_sequence_done(task, &data->res.seq_res))
4077 return -EAGAIN;
5521abfd
TM		 4078 if (nfs4_read_stateid_changed(task, &data->args))
4079 return -EAGAIN;
d20581aa
BH		 4080 return data->read_done_cb ? data->read_done_cb(task, data) :
4081 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4082}
4083
bdc7f021 4084static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4085{
1da177e4 4086 data->timestamp = jiffies;
cbdabc7f 4087 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4089 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4090}
4091
ef1820f9 4092static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4093{
9b206149 4094 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4095 &data->args.seq_args,
4096 &data->res.seq_res,
9b206149 4097 task))
ef1820f9
N		 4098 return 0;
4099 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4100 data->args.lock_context, FMODE_READ) == -EIO)
4101 return -EIO;
4102 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4103 return -EIO;
4104 return 0;
1da177e4
LT		 4105}
4106
b029bc9b 4107static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4108{
cd841605 4109 struct inode *inode = data->header->inode;
1da177e4 4110
cc668ab3 4111 trace_nfs4_write(data, task->tk_status);
9e33bed5 4112 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4113 rpc_restart_call_prepare(task);
788e7a89 4114 return -EAGAIN;
1da177e4 4115 }
4f9838c7 4116 if (task->tk_status >= 0) {
1da177e4 4117 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4118 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4119 }
788e7a89 4120 return 0;
1da177e4
LT		 4121}
4122
5521abfd
TM		 4123static bool nfs4_write_stateid_changed(struct rpc_task *task,
4124 struct nfs_writeargs *args)
4125{
4126
4127 if (!nfs4_error_stateid_expired(task->tk_status) ||
4128 nfs4_stateid_is_current(&args->stateid,
4129 args->context,
4130 args->lock_context,
4131 FMODE_WRITE))
4132 return false;
4133 rpc_restart_call_prepare(task);
4134 return true;
4135}
4136
b029bc9b
FI		 4137static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4138{
4139 if (!nfs4_sequence_done(task, &data->res.seq_res))
4140 return -EAGAIN;
5521abfd
TM		 4141 if (nfs4_write_stateid_changed(task, &data->args))
4142 return -EAGAIN;
d20581aa
BH		 4143 return data->write_done_cb ? data->write_done_cb(task, data) :
4144 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4145}
4146
5a37f851
TM		 4147static
4148bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4149{
5a37f851
TM		 4150 const struct nfs_pgio_header *hdr = data->header;
4151
4152 /* Don't request attributes for pNFS or O_DIRECT writes */
4153 if (data->ds_clp != NULL || hdr->dreq != NULL)
4154 return false;
4155 /* Otherwise, request attributes if and only if we don't hold
4156 * a delegation
4157 */
011e2a7f 4158 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4159}
a69aef14 4160
bdc7f021 4161static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4162{
cd841605 4163 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4164
5a37f851 4165 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4166 data->args.bitmask = NULL;
4167 data->res.fattr = NULL;
4168 } else
4169 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4170
b029bc9b
FI		 4171 if (!data->write_done_cb)
4172 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4173 data->res.server = server;
1da177e4
LT		 4174 data->timestamp = jiffies;
4175
bdc7f021 4176 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4177 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4178}
4179
ef1820f9 4180static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4181{
9b206149 4182 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4183 &data->args.seq_args,
4184 &data->res.seq_res,
9b206149 4185 task))
ef1820f9
N		 4186 return 0;
4187 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4188 data->args.lock_context, FMODE_WRITE) == -EIO)
4189 return -EIO;
4190 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4191 return -EIO;
4192 return 0;
1da177e4
LT		 4193}
4194
0b7c0153 4195static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4196{
d9afbd1b
TM		 4197 nfs4_setup_sequence(NFS_SERVER(data->inode),
4198 &data->args.seq_args,
4199 &data->res.seq_res,
4200 task);
1da177e4
LT		 4201}
4202
0b7c0153 4203static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4204{
1da177e4 4205 struct inode *inode = data->inode;
14516c3a 4206
cc668ab3 4207 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4208 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4209 rpc_restart_call_prepare(task);
788e7a89 4210 return -EAGAIN;
1da177e4 4211 }
788e7a89 4212 return 0;
1da177e4
LT		 4213}
4214
0b7c0153 4215static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4216{
4217 if (!nfs4_sequence_done(task, &data->res.seq_res))
4218 return -EAGAIN;
0b7c0153 4219 return data->commit_done_cb(task, data);
5f452431
FI		 4220}
4221
0b7c0153 4222static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4223{
788e7a89 4224 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4225
0b7c0153
FI		 4226 if (data->commit_done_cb == NULL)
4227 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4228 data->res.server = server;
bdc7f021 4229 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4230 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4231}
4232
9bc4e3ca
CL		 4233struct nfs4_renewdata {
4234 struct nfs_client *client;
4235 unsigned long timestamp;
4236};
4237
1da177e4
LT		 4238/*
4239 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4240 * standalone procedure for queueing an asynchronous RENEW.
4241 */
9bc4e3ca 4242static void nfs4_renew_release(void *calldata)
dc96aef9 4243{
9bc4e3ca
CL		 4244 struct nfs4_renewdata *data = calldata;
4245 struct nfs_client *clp = data->client;
dc96aef9 4246
0851de06
AB		 4247 if (atomic_read(&clp->cl_count) > 1)
4248 nfs4_schedule_state_renewal(clp);
4249 nfs_put_client(clp);
9bc4e3ca 4250 kfree(data);
dc96aef9
AB		 4251}
4252
9bc4e3ca 4253static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4254{
9bc4e3ca
CL		 4255 struct nfs4_renewdata *data = calldata;
4256 struct nfs_client *clp = data->client;
4257 unsigned long timestamp = data->timestamp;
1da177e4 4258
c6d01c6f 4259 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4260 switch (task->tk_status) {
4261 case 0:
4262 break;
4263 case -NFS4ERR_LEASE_MOVED:
4264 nfs4_schedule_lease_moved_recovery(clp);
4265 break;
4266 default:
95baa25c 4267 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4268 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4269 return;
4270 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4271 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4272 return;
4273 }
4274 nfs4_schedule_path_down_recovery(clp);
1da177e4 4275 }
452e9352 4276 do_renew_lease(clp, timestamp);
1da177e4
LT		 4277}
4278
963d8fe5
TM		 4279static const struct rpc_call_ops nfs4_renew_ops = {
4280 .rpc_call_done = nfs4_renew_done,
dc96aef9 4281 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4282};
4283
2f60ea6b 4284static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4285{
4286 struct rpc_message msg = {
4287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4288 .rpc_argp = clp,
b4454fe1 4289 .rpc_cred = cred,
1da177e4 4290 };
9bc4e3ca 4291 struct nfs4_renewdata *data;
1da177e4 4292
2f60ea6b
TM		 4293 if (renew_flags == 0)
4294 return 0;
0851de06
AB		 4295 if (!atomic_inc_not_zero(&clp->cl_count))
4296 return -EIO;
b569ad34 4297 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4298 if (data == NULL)
4299 return -ENOMEM;
4300 data->client = clp;
4301 data->timestamp = jiffies;
bc7a05ca 4302 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4303 &nfs4_renew_ops, data);
1da177e4
LT		 4304}
4305
8534d4ec 4306static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4307{
4308 struct rpc_message msg = {
4309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4310 .rpc_argp = clp,
b4454fe1 4311 .rpc_cred = cred,
1da177e4
LT		 4312 };
4313 unsigned long now = jiffies;
4314 int status;
4315
bc7a05ca 4316 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4317 if (status < 0)
4318 return status;
452e9352 4319 do_renew_lease(clp, now);
1da177e4
LT		 4320 return 0;
4321}
4322
aa1870af
BF		 4323static inline int nfs4_server_supports_acls(struct nfs_server *server)
4324{
7dd7d959 4325 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4326}
4327
21f498c2
TM		 4328/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4329 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4330 * the stack.
4331 */
21f498c2 4332#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4333
e9e3d724
NH		 4334static int buf_to_pages_noslab(const void *buf, size_t buflen,
4335 struct page **pages, unsigned int *pgbase)
4336{
4337 struct page *newpage, **spages;
4338 int rc = 0;
4339 size_t len;
4340 spages = pages;
4341
4342 do {
21f498c2 4343 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4344 newpage = alloc_page(GFP_KERNEL);
4345
4346 if (newpage == NULL)
4347 goto unwind;
4348 memcpy(page_address(newpage), buf, len);
4349 buf += len;
4350 buflen -= len;
4351 *pages++ = newpage;
4352 rc++;
4353 } while (buflen != 0);
4354
4355 return rc;
4356
4357unwind:
4358 for(; rc > 0; rc--)
4359 __free_page(spages[rc-1]);
4360 return -ENOMEM;
4361}
4362
e50a1c2e
BF		 4363struct nfs4_cached_acl {
4364 int cached;
4365 size_t len;
3e9d4154 4366 char data[0];
e50a1c2e
BF		 4367};
4368
4369static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4370{
4371 struct nfs_inode *nfsi = NFS_I(inode);
4372
4373 spin_lock(&inode->i_lock);
4374 kfree(nfsi->nfs4_acl);
4375 nfsi->nfs4_acl = acl;
4376 spin_unlock(&inode->i_lock);
4377}
4378
4379static void nfs4_zap_acl_attr(struct inode *inode)
4380{
4381 nfs4_set_cached_acl(inode, NULL);
4382}
4383
4384static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4385{
4386 struct nfs_inode *nfsi = NFS_I(inode);
4387 struct nfs4_cached_acl *acl;
4388 int ret = -ENOENT;
4389
4390 spin_lock(&inode->i_lock);
4391 acl = nfsi->nfs4_acl;
4392 if (acl == NULL)
4393 goto out;
4394 if (buf == NULL) /* user is just asking for length */
4395 goto out_len;
4396 if (acl->cached == 0)
4397 goto out;
4398 ret = -ERANGE; /* see getxattr(2) man page */
4399 if (acl->len > buflen)
4400 goto out;
4401 memcpy(buf, acl->data, acl->len);
4402out_len:
4403 ret = acl->len;
4404out:
4405 spin_unlock(&inode->i_lock);
4406 return ret;
4407}
4408
5794d21e 4409static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4410{
4411 struct nfs4_cached_acl *acl;
b291f1b1 4412 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4413
1f1ea6c2 4414 if (buflen <= PAGE_SIZE) {
b291f1b1 4415 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4416 if (acl == NULL)
4417 goto out;
4418 acl->cached = 1;
5794d21e 4419 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4420 } else {
4421 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4422 if (acl == NULL)
4423 goto out;
4424 acl->cached = 0;
4425 }
4426 acl->len = acl_len;
4427out:
4428 nfs4_set_cached_acl(inode, acl);
4429}
4430
bf118a34
AA		 4431/*
4432 * The getxattr API returns the required buffer length when called with a
4433 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4434 * the required buf. On a NULL buf, we send a page of data to the server
4435 * guessing that the ACL request can be serviced by a page. If so, we cache
4436 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4437 * the cache. If not so, we throw away the page, and cache the required
4438 * length. The next getxattr call will then produce another round trip to
4439 * the server, this time with the input buf of the required size.
4440 */
16b4289c 4441static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4442{
bf118a34 4443 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4444 struct nfs_getaclargs args = {
4445 .fh = NFS_FH(inode),
4446 .acl_pages = pages,
4447 .acl_len = buflen,
4448 };
663c79b3
BH		 4449 struct nfs_getaclres res = {
4450 .acl_len = buflen,
4451 };
aa1870af
BF		 4452 struct rpc_message msg = {
4453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4454 .rpc_argp = &args,
663c79b3 4455 .rpc_resp = &res,
aa1870af 4456 };
21f498c2
TM		 4457 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4458 int ret = -ENOMEM, i;
aa1870af 4459
bf118a34
AA		 4460 /* As long as we're doing a round trip to the server anyway,
4461 * let's be prepared for a page of acl data. */
4462 if (npages == 0)
4463 npages = 1;
21f498c2
TM		 4464 if (npages > ARRAY_SIZE(pages))
4465 return -ERANGE;
5a006899 4466
bf118a34
AA		 4467 for (i = 0; i < npages; i++) {
4468 pages[i] = alloc_page(GFP_KERNEL);
4469 if (!pages[i])
4470 goto out_free;
e50a1c2e 4471 }
5a006899
SP		 4472
4473 /* for decoding across pages */
4474 res.acl_scratch = alloc_page(GFP_KERNEL);
4475 if (!res.acl_scratch)
4476 goto out_free;
4477
bf118a34
AA		 4478 args.acl_len = npages * PAGE_SIZE;
4479 args.acl_pgbase = 0;
5a006899 4480
de040bec 4481 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4482 __func__, buf, buflen, npages, args.acl_len);
4483 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4484 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4485 if (ret)
4486 goto out_free;
bf118a34 4487
1f1ea6c2
TM		 4488 /* Handle the case where the passed-in buffer is too short */
4489 if (res.acl_flags & NFS4_ACL_TRUNC) {
4490 /* Did the user only issue a request for the acl length? */
4491 if (buf == NULL)
4492 goto out_ok;
e50a1c2e 4493 ret = -ERANGE;
1f1ea6c2 4494 goto out_free;
e50a1c2e 4495 }
1f1ea6c2 4496 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4497 if (buf) {
4498 if (res.acl_len > buflen) {
4499 ret = -ERANGE;
4500 goto out_free;
4501 }
1f1ea6c2 4502 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4503 }
1f1ea6c2
TM		 4504out_ok:
4505 ret = res.acl_len;
e50a1c2e 4506out_free:
bf118a34
AA		 4507 for (i = 0; i < npages; i++)
4508 if (pages[i])
4509 __free_page(pages[i]);
331818f1
TM		 4510 if (res.acl_scratch)
4511 __free_page(res.acl_scratch);
aa1870af
BF		 4512 return ret;
4513}
4514
16b4289c
TM		 4515static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4516{
4517 struct nfs4_exception exception = { };
4518 ssize_t ret;
4519 do {
4520 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4521 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4522 if (ret >= 0)
4523 break;
4524 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4525 } while (exception.retry);
4526 return ret;
4527}
4528
e50a1c2e
BF		 4529static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4530{
4531 struct nfs_server *server = NFS_SERVER(inode);
4532 int ret;
4533
4534 if (!nfs4_server_supports_acls(server))
4535 return -EOPNOTSUPP;
4536 ret = nfs_revalidate_inode(server, inode);
4537 if (ret < 0)
4538 return ret;
08a22b39
AK		 4539 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4540 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4541 ret = nfs4_read_cached_acl(inode, buf, buflen);
4542 if (ret != -ENOENT)
bf118a34
AA		 4543 /* -ENOENT is returned if there is no ACL or if there is an ACL
4544 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4545 return ret;
4546 return nfs4_get_acl_uncached(inode, buf, buflen);
4547}
4548
16b4289c 4549static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4550{
4551 struct nfs_server *server = NFS_SERVER(inode);
4552 struct page *pages[NFS4ACL_MAXPAGES];
4553 struct nfs_setaclargs arg = {
4554 .fh = NFS_FH(inode),
4555 .acl_pages = pages,
4556 .acl_len = buflen,
4557 };
73c403a9 4558 struct nfs_setaclres res;
4b580ee3
BF		 4559 struct rpc_message msg = {
4560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4561 .rpc_argp = &arg,
73c403a9 4562 .rpc_resp = &res,
4b580ee3 4563 };
21f498c2 4564 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4565 int ret, i;
4b580ee3
BF		 4566
4567 if (!nfs4_server_supports_acls(server))
4568 return -EOPNOTSUPP;
21f498c2
TM		 4569 if (npages > ARRAY_SIZE(pages))
4570 return -ERANGE;
e9e3d724
NH		 4571 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4572 if (i < 0)
4573 return i;
57ec14c5 4574 nfs4_inode_return_delegation(inode);
7c513058 4575 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4576
4577 /*
4578 * Free each page after tx, so the only ref left is
4579 * held by the network stack
4580 */
4581 for (; i > 0; i--)
4582 put_page(pages[i-1]);
4583
08a22b39
AK		 4584 /*
4585 * Acl update can result in inode attribute update.
4586 * so mark the attribute cache invalid.
4587 */
4588 spin_lock(&inode->i_lock);
4589 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4590 spin_unlock(&inode->i_lock);
f41f7418
TM		 4591 nfs_access_zap_cache(inode);
4592 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4593 return ret;
4594}
4595
16b4289c
TM		 4596static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4597{
4598 struct nfs4_exception exception = { };
4599 int err;
4600 do {
c1578b76
TM		 4601 err = __nfs4_proc_set_acl(inode, buf, buflen);
4602 trace_nfs4_set_acl(inode, err);
4603 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4604 &exception);
4605 } while (exception.retry);
4606 return err;
4607}
4608
aa9c2669
DQ		 4609#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4610static int _nfs4_get_security_label(struct inode *inode, void *buf,
4611 size_t buflen)
4612{
4613 struct nfs_server *server = NFS_SERVER(inode);
4614 struct nfs_fattr fattr;
4615 struct nfs4_label label = {0, 0, buflen, buf};
4616
4617 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4618 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4619 .fh = NFS_FH(inode),
4620 .bitmask = bitmask,
4621 };
4622 struct nfs4_getattr_res res = {
4623 .fattr = &fattr,
4624 .label = &label,
4625 .server = server,
4626 };
4627 struct rpc_message msg = {
4628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4629 .rpc_argp = &arg,
aa9c2669
DQ		 4630 .rpc_resp = &res,
4631 };
4632 int ret;
4633
4634 nfs_fattr_init(&fattr);
4635
fcb63a9b 4636 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4637 if (ret)
4638 return ret;
4639 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4640 return -ENOENT;
4641 if (buflen < label.len)
4642 return -ERANGE;
4643 return 0;
4644}
4645
4646static int nfs4_get_security_label(struct inode *inode, void *buf,
4647 size_t buflen)
4648{
4649 struct nfs4_exception exception = { };
4650 int err;
4651
4652 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4653 return -EOPNOTSUPP;
4654
4655 do {
c1578b76
TM		 4656 err = _nfs4_get_security_label(inode, buf, buflen);
4657 trace_nfs4_get_security_label(inode, err);
4658 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4659 &exception);
4660 } while (exception.retry);
4661 return err;
4662}
4663
4664static int _nfs4_do_set_security_label(struct inode *inode,
4665 struct nfs4_label *ilabel,
4666 struct nfs_fattr *fattr,
4667 struct nfs4_label *olabel)
4668{
4669
4670 struct iattr sattr = {0};
4671 struct nfs_server *server = NFS_SERVER(inode);
4672 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4673 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4674 .fh = NFS_FH(inode),
4675 .iap = &sattr,
4676 .server = server,
4677 .bitmask = bitmask,
4678 .label = ilabel,
4679 };
4680 struct nfs_setattrres res = {
4681 .fattr = fattr,
4682 .label = olabel,
4683 .server = server,
4684 };
4685 struct rpc_message msg = {
4686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4687 .rpc_argp = &arg,
aa9c2669
DQ		 4688 .rpc_resp = &res,
4689 };
4690 int status;
4691
12207f69 4692 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4693
12207f69 4694 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4695 if (status)
4696 dprintk("%s failed: %d\n", __func__, status);
4697
4698 return status;
4699}
4700
4701static int nfs4_do_set_security_label(struct inode *inode,
4702 struct nfs4_label *ilabel,
4703 struct nfs_fattr *fattr,
4704 struct nfs4_label *olabel)
4705{
4706 struct nfs4_exception exception = { };
4707 int err;
4708
4709 do {
c1578b76
TM		 4710 err = _nfs4_do_set_security_label(inode, ilabel,
4711 fattr, olabel);
4712 trace_nfs4_set_security_label(inode, err);
4713 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4714 &exception);
4715 } while (exception.retry);
4716 return err;
4717}
4718
4719static int
4720nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4721{
4722 struct nfs4_label ilabel, *olabel = NULL;
4723 struct nfs_fattr fattr;
4724 struct rpc_cred *cred;
4725 struct inode *inode = dentry->d_inode;
4726 int status;
4727
4728 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4729 return -EOPNOTSUPP;
4730
4731 nfs_fattr_init(&fattr);
4732
4733 ilabel.pi = 0;
4734 ilabel.lfs = 0;
4735 ilabel.label = (char *)buf;
4736 ilabel.len = buflen;
4737
4738 cred = rpc_lookup_cred();
4739 if (IS_ERR(cred))
4740 return PTR_ERR(cred);
4741
4742 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4743 if (IS_ERR(olabel)) {
4744 status = -PTR_ERR(olabel);
4745 goto out;
4746 }
4747
4748 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4749 if (status == 0)
4750 nfs_setsecurity(inode, &fattr, olabel);
4751
4752 nfs4_label_free(olabel);
4753out:
4754 put_rpccred(cred);
4755 return status;
4756}
4757#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4758
4759
1da177e4 4760static int
aa5190d0 4761nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4762{
aa5190d0
TM		 4763 struct nfs_client *clp = server->nfs_client;
4764
4765 if (task->tk_status >= 0)
1da177e4
LT		 4766 return 0;
4767 switch(task->tk_status) {
a1d0b5ee 4768 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4769 case -NFS4ERR_ADMIN_REVOKED:
4770 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4771 if (state == NULL)
4772 break;
4773 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4774 case -NFS4ERR_OPENMODE:
4775 if (state == NULL)
4776 break;
5d422301 4777 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4778 goto recovery_failed;
0400a6b0 4779 goto wait_on_recovery;
0ced63d1 4780 case -NFS4ERR_EXPIRED:
5d422301
TM		 4781 if (state != NULL) {
4782 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4783 goto recovery_failed;
5d422301 4784 }
1da177e4 4785 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4786 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4787 nfs4_schedule_lease_recovery(clp);
4788 goto wait_on_recovery;
519ae255
CL		 4789 case -NFS4ERR_MOVED:
4790 if (nfs4_schedule_migration_recovery(server) < 0)
4791 goto recovery_failed;
4792 goto wait_on_recovery;
8ef2f8d4
CL		 4793 case -NFS4ERR_LEASE_MOVED:
4794 nfs4_schedule_lease_moved_recovery(clp);
4795 goto wait_on_recovery;
4745e315
AA		 4796#if defined(CONFIG_NFS_V4_1)
4797 case -NFS4ERR_BADSESSION:
4798 case -NFS4ERR_BADSLOT:
4799 case -NFS4ERR_BAD_HIGH_SLOT:
4800 case -NFS4ERR_DEADSESSION:
4801 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4802 case -NFS4ERR_SEQ_FALSE_RETRY:
4803 case -NFS4ERR_SEQ_MISORDERED:
4804 dprintk("%s ERROR %d, Reset session\n", __func__,
4805 task->tk_status);
9f594791 4806 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4807 goto wait_on_recovery;
4745e315 4808#endif /* CONFIG_NFS_V4_1 */
1da177e4 4809 case -NFS4ERR_DELAY:
aa5190d0 4810 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4811 case -NFS4ERR_GRACE:
1da177e4 4812 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4813 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4814 case -NFS4ERR_OLD_STATEID:
f1478c13 4815 goto restart_call;
1da177e4
LT		 4816 }
4817 task->tk_status = nfs4_map_errors(task->tk_status);
4818 return 0;
9f51a78e 4819recovery_failed:
5d422301
TM		 4820 task->tk_status = -EIO;
4821 return 0;
0400a6b0 4822wait_on_recovery:
a2c0b9e2 4823 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4824 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4825 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4826 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4827 goto recovery_failed;
f1478c13 4828restart_call:
a2c0b9e2
TM		 4829 task->tk_status = 0;
4830 return -EAGAIN;
1da177e4
LT		 4831}
4832
f092075d
CL		 4833static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4834 nfs4_verifier *bootverf)
cd93710e
CL		 4835{
4836 __be32 verf[2];
4837
2c820d9a
CL		 4838 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4839 /* An impossible timestamp guarantees this value
4840 * will never match a generated boot time. */
4841 verf[0] = 0;
17f26b12 4842 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4843 } else {
f092075d 4844 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4845 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4846 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4847 }
cd93710e
CL		 4848 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4849}
4850
e984a55a
CL		 4851static unsigned int
4852nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4853 char *buf, size_t len)
4854{
4855 unsigned int result;
4856
4857 rcu_read_lock();
4858 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4859 clp->cl_ipaddr,
4860 rpc_peeraddr2str(clp->cl_rpcclient,
4861 RPC_DISPLAY_ADDR),
4862 rpc_peeraddr2str(clp->cl_rpcclient,
4863 RPC_DISPLAY_PROTO));
4864 rcu_read_unlock();
4865 return result;
4866}
4867
4868static unsigned int
4869nfs4_init_uniform_client_string(const struct nfs_client *clp,
4870 char *buf, size_t len)
4871{
55b59293 4872 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4873
4874 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4875 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4876 clp->rpc_ops->version,
4877 clp->cl_minorversion,
4878 nfs4_client_id_uniquifier,
4879 nodename);
e984a55a
CL		 4880 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4881 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4882 nodename);
e984a55a
CL		 4883}
4884
6bbb4ae8
CL		 4885/**
4886 * nfs4_proc_setclientid - Negotiate client ID
4887 * @clp: state data structure
4888 * @program: RPC program for NFSv4 callback service
4889 * @port: IP port number for NFS4 callback service
4890 * @cred: RPC credential to use for this call
4891 * @res: where to place the result
4892 *
4893 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4894 */
bb8b27e5
TM		 4895int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4896 unsigned short port, struct rpc_cred *cred,
4897 struct nfs4_setclientid_res *res)
1da177e4
LT		 4898{
4899 nfs4_verifier sc_verifier;
4900 struct nfs4_setclientid setclientid = {
4901 .sc_verifier = &sc_verifier,
4902 .sc_prog = program,
f4eecd5d 4903 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4904 };
4905 struct rpc_message msg = {
4906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4907 .rpc_argp = &setclientid,
bb8b27e5 4908 .rpc_resp = res,
286d7d6a 4909 .rpc_cred = cred,
1da177e4 4910 };
6bbb4ae8 4911 int status;
1da177e4 4912
de734831 4913 /* nfs_client_id4 */
f092075d 4914 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4915 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4916 setclientid.sc_name_len =
4917 nfs4_init_uniform_client_string(clp,
4918 setclientid.sc_name,
4919 sizeof(setclientid.sc_name));
4920 else
4921 setclientid.sc_name_len =
4922 nfs4_init_nonuniform_client_string(clp,
4923 setclientid.sc_name,
4924 sizeof(setclientid.sc_name));
de734831 4925 /* cb_client4 */
e984a55a 4926 rcu_read_lock();
de734831 4927 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4928 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4929 rpc_peeraddr2str(clp->cl_rpcclient,
4930 RPC_DISPLAY_NETID));
de734831
CL		 4931 rcu_read_unlock();
4932 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4933 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4934 clp->cl_ipaddr, port >> 8, port & 255);
4935
6bbb4ae8
CL		 4936 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4937 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4938 setclientid.sc_name_len, setclientid.sc_name);
4939 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4940 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4941 dprintk("NFS reply setclientid: %d\n", status);
4942 return status;
1da177e4
LT		 4943}
4944
6bbb4ae8
CL		 4945/**
4946 * nfs4_proc_setclientid_confirm - Confirm client ID
4947 * @clp: state data structure
4948 * @res: result of a previous SETCLIENTID
4949 * @cred: RPC credential to use for this call
4950 *
4951 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4952 */
fd954ae1 4953int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4954 struct nfs4_setclientid_res *arg,
4955 struct rpc_cred *cred)
1da177e4 4956{
1da177e4
LT		 4957 struct rpc_message msg = {
4958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4959 .rpc_argp = arg,
286d7d6a 4960 .rpc_cred = cred,
1da177e4 4961 };
1da177e4
LT		 4962 int status;
4963
6bbb4ae8
CL		 4964 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4965 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4966 clp->cl_clientid);
1bd714f2 4967 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4968 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4969 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4970 return status;
4971}
4972
fe650407
TM		 4973struct nfs4_delegreturndata {
4974 struct nfs4_delegreturnargs args;
fa178f29 4975 struct nfs4_delegreturnres res;
fe650407
TM		 4976 struct nfs_fh fh;
4977 nfs4_stateid stateid;
26e976a8 4978 unsigned long timestamp;
fa178f29 4979 struct nfs_fattr fattr;
fe650407
TM		 4980 int rpc_status;
4981};
4982
fe650407
TM		 4983static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4984{
4985 struct nfs4_delegreturndata *data = calldata;
938e1010 4986
14516c3a
TM		 4987 if (!nfs4_sequence_done(task, &data->res.seq_res))
4988 return;
938e1010 4989
ca8acf8d 4990 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 4991 switch (task->tk_status) {
79708861 4992 case 0:
fa178f29 4993 renew_lease(data->res.server, data->timestamp);
79708861 4994 break;
c97cf606
TM		 4995 case -NFS4ERR_ADMIN_REVOKED:
4996 case -NFS4ERR_DELEG_REVOKED:
4997 case -NFS4ERR_BAD_STATEID:
4998 case -NFS4ERR_OLD_STATEID:
4999 case -NFS4ERR_STALE_STATEID:
5000 case -NFS4ERR_EXPIRED:
5001 task->tk_status = 0;
5002 break;
79708861
RL		 5003 default:
5004 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5005 -EAGAIN) {
d00c5d43 5006 rpc_restart_call_prepare(task);
79708861
RL		 5007 return;
5008 }
5009 }
5010 data->rpc_status = task->tk_status;
fe650407
TM		 5011}
5012
5013static void nfs4_delegreturn_release(void *calldata)
5014{
fe650407
TM		 5015 kfree(calldata);
5016}
5017
938e1010
AA		 5018static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5019{
5020 struct nfs4_delegreturndata *d_data;
5021
5022 d_data = (struct nfs4_delegreturndata *)data;
5023
d9afbd1b
TM		 5024 nfs4_setup_sequence(d_data->res.server,
5025 &d_data->args.seq_args,
5026 &d_data->res.seq_res,
5027 task);
938e1010 5028}
938e1010 5029
c8d149f3 5030static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5031 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5032 .rpc_call_done = nfs4_delegreturn_done,
5033 .rpc_release = nfs4_delegreturn_release,
5034};
5035
e6f81075 5036static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5037{
5038 struct nfs4_delegreturndata *data;
fa178f29 5039 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5040 struct rpc_task *task;
5138fde0
TM		 5041 struct rpc_message msg = {
5042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5043 .rpc_cred = cred,
5044 };
c970aa85
TM		 5045 struct rpc_task_setup task_setup_data = {
5046 .rpc_client = server->client,
5138fde0 5047 .rpc_message = &msg,
c970aa85
TM		 5048 .callback_ops = &nfs4_delegreturn_ops,
5049 .flags = RPC_TASK_ASYNC,
5050 };
e6f81075 5051 int status = 0;
fe650407 5052
8535b2be 5053 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5054 if (data == NULL)
5055 return -ENOMEM;
a9c92d6b 5056 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5057 data->args.fhandle = &data->fh;
5058 data->args.stateid = &data->stateid;
9e907fec 5059 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5060 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5061 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5062 data->res.fattr = &data->fattr;
5063 data->res.server = server;
5138fde0 5064 nfs_fattr_init(data->res.fattr);
26e976a8 5065 data->timestamp = jiffies;
fe650407
TM		 5066 data->rpc_status = 0;
5067
c970aa85 5068 task_setup_data.callback_data = data;
1174dd1f
TM		 5069 msg.rpc_argp = &data->args;
5070 msg.rpc_resp = &data->res;
c970aa85 5071 task = rpc_run_task(&task_setup_data);
7a1218a2 5072 if (IS_ERR(task))
fe650407 5073 return PTR_ERR(task);
e6f81075
TM		 5074 if (!issync)
5075 goto out;
fe650407 5076 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5077 if (status != 0)
5078 goto out;
5079 status = data->rpc_status;
e144cbcc
TM		 5080 if (status == 0)
5081 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5082 else
5083 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5084out:
e6b3c4db 5085 rpc_put_task(task);
fe650407 5086 return status;
1da177e4
LT		 5087}
5088
e6f81075 5089int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5090{
5091 struct nfs_server *server = NFS_SERVER(inode);
5092 struct nfs4_exception exception = { };
5093 int err;
5094 do {
e6f81075 5095 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5096 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5097 switch (err) {
5098 case -NFS4ERR_STALE_STATEID:
5099 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5100 case 0:
5101 return 0;
5102 }
5103 err = nfs4_handle_exception(server, err, &exception);
5104 } while (exception.retry);
5105 return err;
5106}
5107
5108#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5109#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5110
5111/*
5112 * sleep, with exponential backoff, and retry the LOCK operation.
5113 */
5114static unsigned long
5115nfs4_set_lock_task_retry(unsigned long timeout)
5116{
416ad3c9 5117 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5118 timeout <<= 1;
5119 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5120 return NFS4_LOCK_MAXTIMEOUT;
5121 return timeout;
5122}
5123
1da177e4
LT		 5124static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5125{
5126 struct inode *inode = state->inode;
5127 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5128 struct nfs_client *clp = server->nfs_client;
911d1aaf 5129 struct nfs_lockt_args arg = {
1da177e4 5130 .fh = NFS_FH(inode),
911d1aaf 5131 .fl = request,
1da177e4 5132 };
911d1aaf
TM		 5133 struct nfs_lockt_res res = {
5134 .denied = request,
1da177e4
LT		 5135 };
5136 struct rpc_message msg = {
5137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5138 .rpc_argp = &arg,
5139 .rpc_resp = &res,
5140 .rpc_cred = state->owner->so_cred,
5141 };
1da177e4
LT		 5142 struct nfs4_lock_state *lsp;
5143 int status;
5144
911d1aaf 5145 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5146 status = nfs4_set_lock_state(state, request);
5147 if (status != 0)
5148 goto out;
5149 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5150 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5151 arg.lock_owner.s_dev = server->s_dev;
7c513058 5152 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5153 switch (status) {
5154 case 0:
5155 request->fl_type = F_UNLCK;
5156 break;
5157 case -NFS4ERR_DENIED:
5158 status = 0;
1da177e4 5159 }
70cc6487 5160 request->fl_ops->fl_release_private(request);
a6f951dd 5161 request->fl_ops = NULL;
8d0a8a9d 5162out:
1da177e4
LT		 5163 return status;
5164}
5165
5166static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5167{
5168 struct nfs4_exception exception = { };
5169 int err;
5170
5171 do {
d1b748a5
TM		 5172 err = _nfs4_proc_getlk(state, cmd, request);
5173 trace_nfs4_get_lock(request, state, cmd, err);
5174 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5175 &exception);
5176 } while (exception.retry);
5177 return err;
5178}
5179
5180static int do_vfs_lock(struct file *file, struct file_lock *fl)
5181{
5182 int res = 0;
5183 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5184 case FL_POSIX:
5185 res = posix_lock_file_wait(file, fl);
5186 break;
5187 case FL_FLOCK:
5188 res = flock_lock_file_wait(file, fl);
5189 break;
5190 default:
5191 BUG();
5192 }
1da177e4
LT		 5193 return res;
5194}
5195
faf5f49c 5196struct nfs4_unlockdata {
911d1aaf
TM		 5197 struct nfs_locku_args arg;
5198 struct nfs_locku_res res;
faf5f49c
TM		 5199 struct nfs4_lock_state *lsp;
5200 struct nfs_open_context *ctx;
911d1aaf
TM		 5201 struct file_lock fl;
5202 const struct nfs_server *server;
26e976a8 5203 unsigned long timestamp;
faf5f49c
TM		 5204};
5205
911d1aaf
TM		 5206static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5207 struct nfs_open_context *ctx,
5208 struct nfs4_lock_state *lsp,
5209 struct nfs_seqid *seqid)
5210{
5211 struct nfs4_unlockdata *p;
5212 struct inode *inode = lsp->ls_state->inode;
5213
8535b2be 5214 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5215 if (p == NULL)
5216 return NULL;
5217 p->arg.fh = NFS_FH(inode);
5218 p->arg.fl = &p->fl;
5219 p->arg.seqid = seqid;
c1d51931 5220 p->res.seqid = seqid;
911d1aaf
TM		 5221 p->arg.stateid = &lsp->ls_stateid;
5222 p->lsp = lsp;
5223 atomic_inc(&lsp->ls_count);
5224 /* Ensure we don't close file until we're done freeing locks! */
5225 p->ctx = get_nfs_open_context(ctx);
5226 memcpy(&p->fl, fl, sizeof(p->fl));
5227 p->server = NFS_SERVER(inode);
5228 return p;
5229}
5230
06f814a3 5231static void nfs4_locku_release_calldata(void *data)
faf5f49c 5232{
963d8fe5 5233 struct nfs4_unlockdata *calldata = data;
911d1aaf 5234 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5235 nfs4_put_lock_state(calldata->lsp);
5236 put_nfs_open_context(calldata->ctx);
5237 kfree(calldata);
faf5f49c
TM		 5238}
5239
963d8fe5 5240static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5241{
963d8fe5 5242 struct nfs4_unlockdata *calldata = data;
faf5f49c 5243
14516c3a
TM		 5244 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5245 return;
faf5f49c
TM		 5246 switch (task->tk_status) {
5247 case 0:
f597c537
TM		 5248 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5249 &calldata->res.stateid);
26e976a8 5250 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5251 break;
9e33bed5
TM		 5252 case -NFS4ERR_BAD_STATEID:
5253 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5254 case -NFS4ERR_STALE_STATEID:
5255 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5256 break;
5257 default:
9e33bed5 5258 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5259 rpc_restart_call_prepare(task);
faf5f49c 5260 }
2b1bc308 5261 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5262}
5263
4ce70ada 5264static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5265{
4ce70ada 5266 struct nfs4_unlockdata *calldata = data;
faf5f49c 5267
911d1aaf 5268 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5269 goto out_wait;
795a88c9 5270 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5271 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5272 goto out_no_action;
faf5f49c 5273 }
26e976a8 5274 calldata->timestamp = jiffies;
035168ab 5275 if (nfs4_setup_sequence(calldata->server,
a893693c 5276 &calldata->arg.seq_args,
2240a9e2
TM		 5277 &calldata->res.seq_res,
5278 task) != 0)
5279 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5280 return;
5281out_no_action:
5282 task->tk_action = NULL;
5283out_wait:
5284 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5285}
5286
963d8fe5 5287static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5288 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5289 .rpc_call_done = nfs4_locku_done,
06f814a3 5290 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5291};
5292
a5d16a4d
TM		 5293static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5294 struct nfs_open_context *ctx,
5295 struct nfs4_lock_state *lsp,
5296 struct nfs_seqid *seqid)
5297{
5298 struct nfs4_unlockdata *data;
5138fde0
TM		 5299 struct rpc_message msg = {
5300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5301 .rpc_cred = ctx->cred,
5302 };
c970aa85
TM		 5303 struct rpc_task_setup task_setup_data = {
5304 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5305 .rpc_message = &msg,
c970aa85 5306 .callback_ops = &nfs4_locku_ops,
101070ca 5307 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5308 .flags = RPC_TASK_ASYNC,
5309 };
a5d16a4d 5310
fa940720
WAA		 5311 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5312 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5313
137d6aca
FF		 5314 /* Ensure this is an unlock - when canceling a lock, the
5315 * canceled lock is passed in, and it won't be an unlock.
5316 */
5317 fl->fl_type = F_UNLCK;
5318
a5d16a4d
TM		 5319 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5320 if (data == NULL) {
5321 nfs_free_seqid(seqid);
5322 return ERR_PTR(-ENOMEM);
5323 }
5324
a9c92d6b 5325 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5326 msg.rpc_argp = &data->arg;
5327 msg.rpc_resp = &data->res;
c970aa85
TM		 5328 task_setup_data.callback_data = data;
5329 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5330}
5331
faf5f49c
TM		 5332static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5333{
65b62a29
TM		 5334 struct inode *inode = state->inode;
5335 struct nfs4_state_owner *sp = state->owner;
5336 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5337 struct nfs_seqid *seqid;
1da177e4 5338 struct nfs4_lock_state *lsp;
06f814a3
TM		 5339 struct rpc_task *task;
5340 int status = 0;
536ff0f8 5341 unsigned char fl_flags = request->fl_flags;
faf5f49c 5342
8d0a8a9d 5343 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5344 /* Unlock _before_ we do the RPC call */
5345 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5346 /* Exclude nfs_delegation_claim_locks() */
5347 mutex_lock(&sp->so_delegreturn_mutex);
5348 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5349 down_read(&nfsi->rwsem);
5350 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5351 up_read(&nfsi->rwsem);
65b62a29 5352 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5353 goto out;
19e03c57
TM		 5354 }
5355 up_read(&nfsi->rwsem);
65b62a29 5356 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5357 if (status != 0)
9b073574
TM		 5358 goto out;
5359 /* Is this a delegated lock? */
8d0a8a9d 5360 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5361 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5362 goto out;
8535b2be 5363 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5364 status = -ENOMEM;
911d1aaf 5365 if (seqid == NULL)
9b073574 5366 goto out;
cd3758e3 5367 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5368 status = PTR_ERR(task);
5369 if (IS_ERR(task))
9b073574 5370 goto out;
a5d16a4d 5371 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5372 rpc_put_task(task);
9b073574 5373out:
536ff0f8 5374 request->fl_flags = fl_flags;
d1b748a5 5375 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5376 return status;
5377}
5378
a5d16a4d
TM		 5379struct nfs4_lockdata {
5380 struct nfs_lock_args arg;
5381 struct nfs_lock_res res;
5382 struct nfs4_lock_state *lsp;
5383 struct nfs_open_context *ctx;
5384 struct file_lock fl;
26e976a8 5385 unsigned long timestamp;
a5d16a4d
TM		 5386 int rpc_status;
5387 int cancelled;
66179efe 5388 struct nfs_server *server;
a5d16a4d
TM		 5389};
5390
5391static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5392 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5393 gfp_t gfp_mask)
1da177e4 5394{
a5d16a4d
TM		 5395 struct nfs4_lockdata *p;
5396 struct inode *inode = lsp->ls_state->inode;
1da177e4 5397 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5398
8535b2be 5399 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5400 if (p == NULL)
5401 return NULL;
5402
5403 p->arg.fh = NFS_FH(inode);
5404 p->arg.fl = &p->fl;
8535b2be 5405 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5406 if (p->arg.open_seqid == NULL)
5407 goto out_free;
8535b2be 5408 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5409 if (p->arg.lock_seqid == NULL)
2f74c0a0 5410 goto out_free_seqid;
a5d16a4d 5411 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5412 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5413 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5414 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5415 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5416 p->lsp = lsp;
66179efe 5417 p->server = server;
a5d16a4d
TM		 5418 atomic_inc(&lsp->ls_count);
5419 p->ctx = get_nfs_open_context(ctx);
5420 memcpy(&p->fl, fl, sizeof(p->fl));
5421 return p;
2f74c0a0
TM		 5422out_free_seqid:
5423 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5424out_free:
5425 kfree(p);
5426 return NULL;
5427}
5428
5429static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5430{
5431 struct nfs4_lockdata *data = calldata;
5432 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5433
3110ff80 5434 dprintk("%s: begin!\n", __func__);
2f74c0a0 5435 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5436 goto out_wait;
a5d16a4d
TM		 5437 /* Do we need to do an open_to_lock_owner? */
5438 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5439 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5440 goto out_release_lock_seqid;
8fe72bac 5441 }
8e472f33 5442 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5443 data->arg.new_lock_owner = 1;
c1d51931 5444 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5445 } else
5446 data->arg.new_lock_owner = 0;
5d422301
TM		 5447 if (!nfs4_valid_open_stateid(state)) {
5448 data->rpc_status = -EBADF;
5449 task->tk_action = NULL;
5450 goto out_release_open_seqid;
5451 }
26e976a8 5452 data->timestamp = jiffies;
035168ab
TM		 5453 if (nfs4_setup_sequence(data->server,
5454 &data->arg.seq_args,
2240a9e2 5455 &data->res.seq_res,
d9afbd1b 5456 task) == 0)
66179efe 5457 return;
5d422301 5458out_release_open_seqid:
2240a9e2
TM		 5459 nfs_release_seqid(data->arg.open_seqid);
5460out_release_lock_seqid:
5461 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5462out_wait:
5463 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5464 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5465}
5466
a5d16a4d
TM		 5467static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5468{
5469 struct nfs4_lockdata *data = calldata;
5470
3110ff80 5471 dprintk("%s: begin!\n", __func__);
a5d16a4d 5472
14516c3a
TM		 5473 if (!nfs4_sequence_done(task, &data->res.seq_res))
5474 return;
66179efe 5475
a5d16a4d 5476 data->rpc_status = task->tk_status;
a5d16a4d 5477 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5478 if (data->rpc_status == 0)
5479 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5480 else
5481 goto out;
5482 }
5483 if (data->rpc_status == 0) {
f597c537 5484 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5485 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5486 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5487 }
a5d16a4d 5488out:
3110ff80 5489 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5490}
5491
5492static void nfs4_lock_release(void *calldata)
5493{
5494 struct nfs4_lockdata *data = calldata;
5495
3110ff80 5496 dprintk("%s: begin!\n", __func__);
2f74c0a0 5497 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5498 if (data->cancelled != 0) {
5499 struct rpc_task *task;
5500 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5501 data->arg.lock_seqid);
5502 if (!IS_ERR(task))
bf294b41 5503 rpc_put_task_async(task);
3110ff80 5504 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5505 } else
5506 nfs_free_seqid(data->arg.lock_seqid);
5507 nfs4_put_lock_state(data->lsp);
5508 put_nfs_open_context(data->ctx);
5509 kfree(data);
3110ff80 5510 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5511}
5512
5513static const struct rpc_call_ops nfs4_lock_ops = {
5514 .rpc_call_prepare = nfs4_lock_prepare,
5515 .rpc_call_done = nfs4_lock_done,
5516 .rpc_release = nfs4_lock_release,
5517};
5518
2bee72a6
TM		 5519static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5520{
2bee72a6
TM		 5521 switch (error) {
5522 case -NFS4ERR_ADMIN_REVOKED:
5523 case -NFS4ERR_BAD_STATEID:
ecac799a 5524 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5525 if (new_lock_owner != 0 ||
795a88c9 5526 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5527 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5528 break;
5529 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5530 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5531 case -NFS4ERR_EXPIRED:
5532 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5533 };
5534}
5535
afe6c27c 5536static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5537{
5538 struct nfs4_lockdata *data;
5539 struct rpc_task *task;
5138fde0
TM		 5540 struct rpc_message msg = {
5541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5542 .rpc_cred = state->owner->so_cred,
5543 };
c970aa85
TM		 5544 struct rpc_task_setup task_setup_data = {
5545 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5546 .rpc_message = &msg,
c970aa85 5547 .callback_ops = &nfs4_lock_ops,
101070ca 5548 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5549 .flags = RPC_TASK_ASYNC,
5550 };
a5d16a4d
TM		 5551 int ret;
5552
3110ff80 5553 dprintk("%s: begin!\n", __func__);
cd3758e3 5554 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5555 fl->fl_u.nfs4_fl.owner,
5556 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5557 if (data == NULL)
5558 return -ENOMEM;
5559 if (IS_SETLKW(cmd))
5560 data->arg.block = 1;
a9c92d6b 5561 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5562 msg.rpc_argp = &data->arg;
5563 msg.rpc_resp = &data->res;
c970aa85 5564 task_setup_data.callback_data = data;
8fe72bac
TM		 5565 if (recovery_type > NFS_LOCK_NEW) {
5566 if (recovery_type == NFS_LOCK_RECLAIM)
5567 data->arg.reclaim = NFS_LOCK_RECLAIM;
5568 nfs4_set_sequence_privileged(&data->arg.seq_args);
5569 }
c970aa85 5570 task = rpc_run_task(&task_setup_data);
7a1218a2 5571 if (IS_ERR(task))
a5d16a4d 5572 return PTR_ERR(task);
a5d16a4d
TM		 5573 ret = nfs4_wait_for_completion_rpc_task(task);
5574 if (ret == 0) {
5575 ret = data->rpc_status;
2bee72a6
TM		 5576 if (ret)
5577 nfs4_handle_setlk_error(data->server, data->lsp,
5578 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5579 } else
5580 data->cancelled = 1;
e6b3c4db 5581 rpc_put_task(task);
3110ff80 5582 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5583 return ret;
1da177e4
LT		 5584}
5585
5586static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5587{
202b50dc 5588 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5589 struct nfs4_exception exception = {
5590 .inode = state->inode,
5591 };
202b50dc
TM		 5592 int err;
5593
5594 do {
42a2d13e
TM		 5595 /* Cache the lock if possible... */
5596 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5597 return 0;
afe6c27c 5598 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5599 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5600 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5601 break;
5602 nfs4_handle_exception(server, err, &exception);
5603 } while (exception.retry);
5604 return err;
1da177e4
LT		 5605}
5606
5607static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5608{
202b50dc 5609 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5610 struct nfs4_exception exception = {
5611 .inode = state->inode,
5612 };
202b50dc
TM		 5613 int err;
5614
6bfc93ef
TM		 5615 err = nfs4_set_lock_state(state, request);
5616 if (err != 0)
5617 return err;
f6de7a39 5618 if (!recover_lost_locks) {
ef1820f9
N		 5619 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5620 return 0;
5621 }
202b50dc 5622 do {
42a2d13e
TM		 5623 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5624 return 0;
afe6c27c 5625 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5626 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5627 switch (err) {
5628 default:
5629 goto out;
5630 case -NFS4ERR_GRACE:
5631 case -NFS4ERR_DELAY:
5632 nfs4_handle_exception(server, err, &exception);
5633 err = 0;
5634 }
202b50dc 5635 } while (exception.retry);
a9ed2e25 5636out:
202b50dc 5637 return err;
1da177e4
LT		 5638}
5639
f062eb6c 5640#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5641/**
5642 * nfs41_check_expired_locks - possibly free a lock stateid
5643 *
5644 * @state: NFSv4 state for an inode
5645 *
5646 * Returns NFS_OK if recovery for this stateid is now finished.
5647 * Otherwise a negative NFS4ERR value is returned.
5648 */
b01dd1d8 5649static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5650{
eb64cf96 5651 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5652 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5653 struct nfs_server *server = NFS_SERVER(state->inode);
5654
b01dd1d8 5655 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5656 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5657 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5658
5659 status = nfs41_test_stateid(server,
5660 &lsp->ls_stateid,
5661 cred);
08cb47fa 5662 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5663 if (status != NFS_OK) {
3e60ffdd
CL		 5664 /* Free the stateid unless the server
5665 * informs us the stateid is unrecognized. */
89af2739
CL		 5666 if (status != -NFS4ERR_BAD_STATEID)
5667 nfs41_free_stateid(server,
ab7cb0df
TM		 5668 &lsp->ls_stateid,
5669 cred);
795a88c9 5670 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5671 ret = status;
5672 }
5673 }
5674 };
5675
5676 return ret;
5677}
5678
5679static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5680{
5681 int status = NFS_OK;
5682
5683 if (test_bit(LK_STATE_IN_USE, &state->flags))
5684 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5685 if (status != NFS_OK)
5686 status = nfs4_lock_expired(state, request);
5687 return status;
f062eb6c
BS		 5688}
5689#endif
5690
1da177e4
LT		 5691static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5692{
9a99af49 5693 struct nfs4_state_owner *sp = state->owner;
19e03c57 5694 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5695 unsigned char fl_flags = request->fl_flags;
9a99af49 5696 unsigned int seq;
8e469ebd 5697 int status = -ENOLCK;
1da177e4 5698
8e469ebd
TM		 5699 if ((fl_flags & FL_POSIX) &&
5700 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5701 goto out;
6bfc93ef 5702 /* Is this a delegated open? */
6bfc93ef
TM		 5703 status = nfs4_set_lock_state(state, request);
5704 if (status != 0)
5705 goto out;
01c3b861
TM		 5706 request->fl_flags |= FL_ACCESS;
5707 status = do_vfs_lock(request->fl_file, request);
5708 if (status < 0)
5709 goto out;
19e03c57 5710 down_read(&nfsi->rwsem);
01c3b861 5711 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5712 /* Yes: cache locks! */
01c3b861 5713 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5714 request->fl_flags = fl_flags & ~FL_SLEEP;
5715 status = do_vfs_lock(request->fl_file, request);
5716 goto out_unlock;
01c3b861 5717 }
9a99af49
TM		 5718 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5719 up_read(&nfsi->rwsem);
afe6c27c 5720 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5721 if (status != 0)
9a99af49
TM		 5722 goto out;
5723 down_read(&nfsi->rwsem);
5724 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5725 status = -NFS4ERR_DELAY;
01c3b861 5726 goto out_unlock;
9a99af49 5727 }
6bfc93ef 5728 /* Note: we always want to sleep here! */
01c3b861 5729 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5730 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5731 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5732 "manager!\n", __func__);
01c3b861 5733out_unlock:
19e03c57 5734 up_read(&nfsi->rwsem);
01c3b861
TM		 5735out:
5736 request->fl_flags = fl_flags;
1da177e4
LT		 5737 return status;
5738}
5739
5740static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5741{
a1d0b5ee
TM		 5742 struct nfs4_exception exception = {
5743 .state = state,
05ffe24f 5744 .inode = state->inode,
a1d0b5ee 5745 };
1da177e4
LT		 5746 int err;
5747
5748 do {
965b5d67 5749 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5750 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5751 if (err == -NFS4ERR_DENIED)
5752 err = -EAGAIN;
1da177e4 5753 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5754 err, &exception);
1da177e4
LT		 5755 } while (exception.retry);
5756 return err;
5757}
5758
5759static int
5760nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5761{
5762 struct nfs_open_context *ctx;
5763 struct nfs4_state *state;
5764 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5765 int status;
5766
5767 /* verify open state */
cd3758e3 5768 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5769 state = ctx->state;
5770
5771 if (request->fl_start < 0 || request->fl_end < 0)
5772 return -EINVAL;
5773
d953126a
TM		 5774 if (IS_GETLK(cmd)) {
5775 if (state != NULL)
5776 return nfs4_proc_getlk(state, F_GETLK, request);
5777 return 0;
5778 }
1da177e4
LT		 5779
5780 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5781 return -EINVAL;
5782
d953126a
TM		 5783 if (request->fl_type == F_UNLCK) {
5784 if (state != NULL)
5785 return nfs4_proc_unlck(state, cmd, request);
5786 return 0;
5787 }
1da177e4 5788
d953126a
TM		 5789 if (state == NULL)
5790 return -ENOLCK;
55725513
TM		 5791 /*
5792 * Don't rely on the VFS having checked the file open mode,
5793 * since it won't do this for flock() locks.
5794 */
f44106e2 5795 switch (request->fl_type) {
55725513
TM		 5796 case F_RDLCK:
5797 if (!(filp->f_mode & FMODE_READ))
5798 return -EBADF;
5799 break;
5800 case F_WRLCK:
5801 if (!(filp->f_mode & FMODE_WRITE))
5802 return -EBADF;
5803 }
5804
1da177e4
LT		 5805 do {
5806 status = nfs4_proc_setlk(state, cmd, request);
5807 if ((status != -EAGAIN) || IS_SETLK(cmd))
5808 break;
5809 timeout = nfs4_set_lock_task_retry(timeout);
5810 status = -ERESTARTSYS;
5811 if (signalled())
5812 break;
5813 } while(status < 0);
1da177e4
LT		 5814 return status;
5815}
5816
db4f2e63 5817int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5818{
5819 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5820 int err;
5821
5822 err = nfs4_set_lock_state(state, fl);
5823 if (err != 0)
db4f2e63 5824 return err;
4a706fa0 5825 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5826 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5827}
6b3b5496 5828
cf470c3e
TM		 5829struct nfs_release_lockowner_data {
5830 struct nfs4_lock_state *lsp;
5ae67c4f 5831 struct nfs_server *server;
cf470c3e 5832 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5833 struct nfs4_sequence_args seq_args;
5834 struct nfs4_sequence_res seq_res;
60ea6812 5835 unsigned long timestamp;
cf470c3e
TM		 5836};
5837
fbd4bfd1
CL		 5838static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5839{
5840 struct nfs_release_lockowner_data *data = calldata;
5841 nfs40_setup_sequence(data->server,
5842 &data->seq_args, &data->seq_res, task);
60ea6812 5843 data->timestamp = jiffies;
fbd4bfd1
CL		 5844}
5845
5846static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5847{
5848 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5849 struct nfs_server *server = data->server;
5850
fbd4bfd1 5851 nfs40_sequence_done(task, &data->seq_res);
60ea6812
CL		 5852
5853 switch (task->tk_status) {
5854 case 0:
5855 renew_lease(server, data->timestamp);
5856 break;
5857 case -NFS4ERR_STALE_CLIENTID:
5858 case -NFS4ERR_EXPIRED:
5859 case -NFS4ERR_LEASE_MOVED:
5860 case -NFS4ERR_DELAY:
5861 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5862 rpc_restart_call_prepare(task);
5863 }
fbd4bfd1
CL		 5864}
5865
d3c7b7cc
TM		 5866static void nfs4_release_lockowner_release(void *calldata)
5867{
cf470c3e 5868 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5869 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5870 kfree(calldata);
5871}
5872
17280175 5873static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5874 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5875 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5876 .rpc_release = nfs4_release_lockowner_release,
5877};
5878
c8b2d0bf 5879static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5880{
cf470c3e 5881 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5882 struct rpc_message msg = {
5883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5884 };
5885
5886 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5887 return -EINVAL;
fbd4bfd1 5888
cf470c3e
TM		 5889 data = kmalloc(sizeof(*data), GFP_NOFS);
5890 if (!data)
5891 return -ENOMEM;
fbd4bfd1 5892 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5893 data->lsp = lsp;
5ae67c4f 5894 data->server = server;
cf470c3e
TM		 5895 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5896 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5897 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5898
cf470c3e
TM		 5899 msg.rpc_argp = &data->args;
5900 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5901 return 0;
d3c7b7cc
TM		 5902}
5903
aa1870af
BF		 5904#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5905
64c2ce8b
AK		 5906static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5907 const void *buf, size_t buflen,
5908 int flags, int type)
6b3b5496 5909{
64c2ce8b
AK		 5910 if (strcmp(key, "") != 0)
5911 return -EINVAL;
4b580ee3 5912
64c2ce8b 5913 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5914}
5915
64c2ce8b
AK		 5916static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5917 void *buf, size_t buflen, int type)
6b3b5496 5918{
64c2ce8b
AK		 5919 if (strcmp(key, "") != 0)
5920 return -EINVAL;
aa1870af 5921
64c2ce8b 5922 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5923}
5924
64c2ce8b
AK		 5925static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5926 size_t list_len, const char *name,
5927 size_t name_len, int type)
6b3b5496 5928{
64c2ce8b 5929 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5930
096455a2
BF		 5931 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5932 return 0;
64c2ce8b
AK		 5933
5934 if (list && len <= list_len)
5935 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5936 return len;
6b3b5496
BF		 5937}
5938
c9bccef6
DQ		 5939#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5940static inline int nfs4_server_supports_labels(struct nfs_server *server)
5941{
5942 return server->caps & NFS_CAP_SECURITY_LABEL;
5943}
5944
5945static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5946 const void *buf, size_t buflen,
5947 int flags, int type)
5948{
5949 if (security_ismaclabel(key))
5950 return nfs4_set_security_label(dentry, buf, buflen);
5951
5952 return -EOPNOTSUPP;
5953}
5954
5955static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5956 void *buf, size_t buflen, int type)
5957{
5958 if (security_ismaclabel(key))
5959 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5960 return -EOPNOTSUPP;
5961}
5962
5963static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5964 size_t list_len, const char *name,
5965 size_t name_len, int type)
5966{
5967 size_t len = 0;
5968
5969 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5970 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5971 if (list && len <= list_len)
5972 security_inode_listsecurity(dentry->d_inode, list, len);
5973 }
5974 return len;
5975}
5976
5977static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5978 .prefix = XATTR_SECURITY_PREFIX,
5979 .list = nfs4_xattr_list_nfs4_label,
5980 .get = nfs4_xattr_get_nfs4_label,
5981 .set = nfs4_xattr_set_nfs4_label,
5982};
5983#endif
5984
5985
533eb461
AA		 5986/*
5987 * nfs_fhget will use either the mounted_on_fileid or the fileid
5988 */
69aaaae1
TM		 5989static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5990{
533eb461
AA		 5991 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5992 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5993 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5994 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5995 return;
5996
5997 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5998 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5999 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6000 fattr->nlink = 2;
6001}
6002
f05d147f
BS		 6003static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6004 const struct qstr *name,
6005 struct nfs4_fs_locations *fs_locations,
6006 struct page *page)
683b57b4
TM		 6007{
6008 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6009 u32 bitmask[3] = {
361e624f 6010 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6011 };
6012 struct nfs4_fs_locations_arg args = {
6013 .dir_fh = NFS_FH(dir),
c228fd3a 6014 .name = name,
683b57b4
TM		 6015 .page = page,
6016 .bitmask = bitmask,
6017 };
22958463
BH		 6018 struct nfs4_fs_locations_res res = {
6019 .fs_locations = fs_locations,
6020 };
683b57b4
TM		 6021 struct rpc_message msg = {
6022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6023 .rpc_argp = &args,
22958463 6024 .rpc_resp = &res,
683b57b4
TM		 6025 };
6026 int status;
6027
3110ff80 6028 dprintk("%s: start\n", __func__);
533eb461
AA		 6029
6030 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6031 * is not supported */
6032 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6033 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6034 else
6035 bitmask[0] |= FATTR4_WORD0_FILEID;
6036
c228fd3a 6037 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6038 fs_locations->server = server;
830b8e33 6039 fs_locations->nlocations = 0;
f05d147f 6040 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6041 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6042 return status;
6043}
6044
f05d147f
BS		 6045int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6046 const struct qstr *name,
6047 struct nfs4_fs_locations *fs_locations,
6048 struct page *page)
db0a9593
BS		 6049{
6050 struct nfs4_exception exception = { };
6051 int err;
6052 do {
078ea3df
TM		 6053 err = _nfs4_proc_fs_locations(client, dir, name,
6054 fs_locations, page);
6055 trace_nfs4_get_fs_locations(dir, name, err);
6056 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6057 &exception);
6058 } while (exception.retry);
6059 return err;
6060}
6061
b03d735b
CL		 6062/*
6063 * This operation also signals the server that this client is
6064 * performing migration recovery. The server can stop returning
6065 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6066 * appended to this compound to identify the client ID which is
6067 * performing recovery.
6068 */
6069static int _nfs40_proc_get_locations(struct inode *inode,
6070 struct nfs4_fs_locations *locations,
6071 struct page *page, struct rpc_cred *cred)
6072{
6073 struct nfs_server *server = NFS_SERVER(inode);
6074 struct rpc_clnt *clnt = server->client;
6075 u32 bitmask[2] = {
6076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6077 };
6078 struct nfs4_fs_locations_arg args = {
6079 .clientid = server->nfs_client->cl_clientid,
6080 .fh = NFS_FH(inode),
6081 .page = page,
6082 .bitmask = bitmask,
6083 .migration = 1, /* skip LOOKUP */
6084 .renew = 1, /* append RENEW */
6085 };
6086 struct nfs4_fs_locations_res res = {
6087 .fs_locations = locations,
6088 .migration = 1,
6089 .renew = 1,
6090 };
6091 struct rpc_message msg = {
6092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6093 .rpc_argp = &args,
6094 .rpc_resp = &res,
6095 .rpc_cred = cred,
6096 };
6097 unsigned long now = jiffies;
6098 int status;
6099
6100 nfs_fattr_init(&locations->fattr);
6101 locations->server = server;
6102 locations->nlocations = 0;
6103
6104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6105 nfs4_set_sequence_privileged(&args.seq_args);
6106 status = nfs4_call_sync_sequence(clnt, server, &msg,
6107 &args.seq_args, &res.seq_res);
6108 if (status)
6109 return status;
6110
6111 renew_lease(server, now);
6112 return 0;
6113}
6114
6115#ifdef CONFIG_NFS_V4_1
6116
6117/*
6118 * This operation also signals the server that this client is
6119 * performing migration recovery. The server can stop asserting
6120 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6121 * performing this operation is identified in the SEQUENCE
6122 * operation in this compound.
6123 *
6124 * When the client supports GETATTR(fs_locations_info), it can
6125 * be plumbed in here.
6126 */
6127static int _nfs41_proc_get_locations(struct inode *inode,
6128 struct nfs4_fs_locations *locations,
6129 struct page *page, struct rpc_cred *cred)
6130{
6131 struct nfs_server *server = NFS_SERVER(inode);
6132 struct rpc_clnt *clnt = server->client;
6133 u32 bitmask[2] = {
6134 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6135 };
6136 struct nfs4_fs_locations_arg args = {
6137 .fh = NFS_FH(inode),
6138 .page = page,
6139 .bitmask = bitmask,
6140 .migration = 1, /* skip LOOKUP */
6141 };
6142 struct nfs4_fs_locations_res res = {
6143 .fs_locations = locations,
6144 .migration = 1,
6145 };
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6148 .rpc_argp = &args,
6149 .rpc_resp = &res,
6150 .rpc_cred = cred,
6151 };
6152 int status;
6153
6154 nfs_fattr_init(&locations->fattr);
6155 locations->server = server;
6156 locations->nlocations = 0;
6157
6158 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6159 nfs4_set_sequence_privileged(&args.seq_args);
6160 status = nfs4_call_sync_sequence(clnt, server, &msg,
6161 &args.seq_args, &res.seq_res);
6162 if (status == NFS4_OK &&
6163 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6164 status = -NFS4ERR_LEASE_MOVED;
6165 return status;
6166}
6167
6168#endif /* CONFIG_NFS_V4_1 */
6169
6170/**
6171 * nfs4_proc_get_locations - discover locations for a migrated FSID
6172 * @inode: inode on FSID that is migrating
6173 * @locations: result of query
6174 * @page: buffer
6175 * @cred: credential to use for this operation
6176 *
6177 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6178 * operation failed, or a negative errno if a local error occurred.
6179 *
6180 * On success, "locations" is filled in, but if the server has
6181 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6182 * asserted.
6183 *
6184 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6185 * from this client that require migration recovery.
6186 */
6187int nfs4_proc_get_locations(struct inode *inode,
6188 struct nfs4_fs_locations *locations,
6189 struct page *page, struct rpc_cred *cred)
6190{
6191 struct nfs_server *server = NFS_SERVER(inode);
6192 struct nfs_client *clp = server->nfs_client;
6193 const struct nfs4_mig_recovery_ops *ops =
6194 clp->cl_mvops->mig_recovery_ops;
6195 struct nfs4_exception exception = { };
6196 int status;
6197
6198 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6199 (unsigned long long)server->fsid.major,
6200 (unsigned long long)server->fsid.minor,
6201 clp->cl_hostname);
6202 nfs_display_fhandle(NFS_FH(inode), __func__);
6203
6204 do {
6205 status = ops->get_locations(inode, locations, page, cred);
6206 if (status != -NFS4ERR_DELAY)
6207 break;
6208 nfs4_handle_exception(server, status, &exception);
6209 } while (exception.retry);
6210 return status;
6211}
6212
44c99933
CL		 6213/*
6214 * This operation also signals the server that this client is
6215 * performing "lease moved" recovery. The server can stop
6216 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6217 * is appended to this compound to identify the client ID which is
6218 * performing recovery.
6219 */
6220static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6221{
6222 struct nfs_server *server = NFS_SERVER(inode);
6223 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6224 struct rpc_clnt *clnt = server->client;
6225 struct nfs4_fsid_present_arg args = {
6226 .fh = NFS_FH(inode),
6227 .clientid = clp->cl_clientid,
6228 .renew = 1, /* append RENEW */
6229 };
6230 struct nfs4_fsid_present_res res = {
6231 .renew = 1,
6232 };
6233 struct rpc_message msg = {
6234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6235 .rpc_argp = &args,
6236 .rpc_resp = &res,
6237 .rpc_cred = cred,
6238 };
6239 unsigned long now = jiffies;
6240 int status;
6241
6242 res.fh = nfs_alloc_fhandle();
6243 if (res.fh == NULL)
6244 return -ENOMEM;
6245
6246 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6247 nfs4_set_sequence_privileged(&args.seq_args);
6248 status = nfs4_call_sync_sequence(clnt, server, &msg,
6249 &args.seq_args, &res.seq_res);
6250 nfs_free_fhandle(res.fh);
6251 if (status)
6252 return status;
6253
6254 do_renew_lease(clp, now);
6255 return 0;
6256}
6257
6258#ifdef CONFIG_NFS_V4_1
6259
6260/*
6261 * This operation also signals the server that this client is
6262 * performing "lease moved" recovery. The server can stop asserting
6263 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6264 * this operation is identified in the SEQUENCE operation in this
6265 * compound.
6266 */
6267static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6268{
6269 struct nfs_server *server = NFS_SERVER(inode);
6270 struct rpc_clnt *clnt = server->client;
6271 struct nfs4_fsid_present_arg args = {
6272 .fh = NFS_FH(inode),
6273 };
6274 struct nfs4_fsid_present_res res = {
6275 };
6276 struct rpc_message msg = {
6277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6278 .rpc_argp = &args,
6279 .rpc_resp = &res,
6280 .rpc_cred = cred,
6281 };
6282 int status;
6283
6284 res.fh = nfs_alloc_fhandle();
6285 if (res.fh == NULL)
6286 return -ENOMEM;
6287
6288 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6289 nfs4_set_sequence_privileged(&args.seq_args);
6290 status = nfs4_call_sync_sequence(clnt, server, &msg,
6291 &args.seq_args, &res.seq_res);
6292 nfs_free_fhandle(res.fh);
6293 if (status == NFS4_OK &&
6294 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6295 status = -NFS4ERR_LEASE_MOVED;
6296 return status;
6297}
6298
6299#endif /* CONFIG_NFS_V4_1 */
6300
6301/**
6302 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6303 * @inode: inode on FSID to check
6304 * @cred: credential to use for this operation
6305 *
6306 * Server indicates whether the FSID is present, moved, or not
6307 * recognized. This operation is necessary to clear a LEASE_MOVED
6308 * condition for this client ID.
6309 *
6310 * Returns NFS4_OK if the FSID is present on this server,
6311 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6312 * NFS4ERR code if some error occurred on the server, or a
6313 * negative errno if a local failure occurred.
6314 */
6315int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6316{
6317 struct nfs_server *server = NFS_SERVER(inode);
6318 struct nfs_client *clp = server->nfs_client;
6319 const struct nfs4_mig_recovery_ops *ops =
6320 clp->cl_mvops->mig_recovery_ops;
6321 struct nfs4_exception exception = { };
6322 int status;
6323
6324 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6325 (unsigned long long)server->fsid.major,
6326 (unsigned long long)server->fsid.minor,
6327 clp->cl_hostname);
6328 nfs_display_fhandle(NFS_FH(inode), __func__);
6329
6330 do {
6331 status = ops->fsid_present(inode, cred);
6332 if (status != -NFS4ERR_DELAY)
6333 break;
6334 nfs4_handle_exception(server, status, &exception);
6335 } while (exception.retry);
6336 return status;
6337}
6338
5ec16a85 6339/**
a5250def
WAA		 6340 * If 'use_integrity' is true and the state managment nfs_client
6341 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6342 * and the machine credential as per RFC3530bis and RFC5661 Security
6343 * Considerations sections. Otherwise, just use the user cred with the
6344 * filesystem's rpc_client.
5ec16a85 6345 */
a5250def 6346static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6347{
6348 int status;
6349 struct nfs4_secinfo_arg args = {
6350 .dir_fh = NFS_FH(dir),
6351 .name = name,
6352 };
6353 struct nfs4_secinfo_res res = {
6354 .flavors = flavors,
6355 };
6356 struct rpc_message msg = {
6357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6358 .rpc_argp = &args,
6359 .rpc_resp = &res,
6360 };
a5250def 6361 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6362 struct rpc_cred *cred = NULL;
a5250def
WAA		 6363
6364 if (use_integrity) {
6365 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6366 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6367 msg.rpc_cred = cred;
a5250def 6368 }
5a5ea0d4
BS		 6369
6370 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6371
6372 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6373 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6374
a5250def
WAA		 6375 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6376 &res.seq_res, 0);
5a5ea0d4 6377 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6378
7cb852df
WAA		 6379 if (cred)
6380 put_rpccred(cred);
a5250def 6381
5a5ea0d4
BS		 6382 return status;
6383}
6384
72de53ec
BS		 6385int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6386 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6387{
6388 struct nfs4_exception exception = { };
6389 int err;
6390 do {
a5250def
WAA		 6391 err = -NFS4ERR_WRONGSEC;
6392
6393 /* try to use integrity protection with machine cred */
6394 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6395 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6396
6397 /*
6398 * if unable to use integrity protection, or SECINFO with
6399 * integrity protection returns NFS4ERR_WRONGSEC (which is
6400 * disallowed by spec, but exists in deployed servers) use
6401 * the current filesystem's rpc_client and the user cred.
6402 */
6403 if (err == -NFS4ERR_WRONGSEC)
6404 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6405
078ea3df
TM		 6406 trace_nfs4_secinfo(dir, name, err);
6407 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6408 &exception);
6409 } while (exception.retry);
6410 return err;
6411}
6412
557134a3 6413#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6414/*
6415 * Check the exchange flags returned by the server for invalid flags, having
6416 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6417 * DS flags set.
6418 */
6419static int nfs4_check_cl_exchange_flags(u32 flags)
6420{
6421 if (flags & ~EXCHGID4_FLAG_MASK_R)
6422 goto out_inval;
6423 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6424 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6425 goto out_inval;
6426 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6427 goto out_inval;
6428 return NFS_OK;
6429out_inval:
6430 return -NFS4ERR_INVAL;
6431}
6432
78fe0f41 6433static bool
79d4e1f0
CL		 6434nfs41_same_server_scope(struct nfs41_server_scope *a,
6435 struct nfs41_server_scope *b)
78fe0f41
WAA		 6436{
6437 if (a->server_scope_sz == b->server_scope_sz &&
6438 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6439 return true;
6440
6441 return false;
6442}
6443
7c44f1ae
WAA		 6444/*
6445 * nfs4_proc_bind_conn_to_session()
6446 *
6447 * The 4.1 client currently uses the same TCP connection for the
6448 * fore and backchannel.
6449 */
2cf047c9 6450int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6451{
6452 int status;
6453 struct nfs41_bind_conn_to_session_res res;
6454 struct rpc_message msg = {
6455 .rpc_proc =
6456 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6457 .rpc_argp = clp,
6458 .rpc_resp = &res,
2cf047c9 6459 .rpc_cred = cred,
7c44f1ae
WAA		 6460 };
6461
6462 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6463
6464 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6465 if (unlikely(res.session == NULL)) {
6466 status = -ENOMEM;
6467 goto out;
6468 }
6469
6470 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6471 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6472 if (status == 0) {
6473 if (memcmp(res.session->sess_id.data,
6474 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6475 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6476 status = -EIO;
6477 goto out_session;
6478 }
6479 if (res.dir != NFS4_CDFS4_BOTH) {
6480 dprintk("NFS: %s: Unexpected direction from server\n",
6481 __func__);
6482 status = -EIO;
6483 goto out_session;
6484 }
6485 if (res.use_conn_in_rdma_mode) {
6486 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6487 __func__);
6488 status = -EIO;
6489 goto out_session;
6490 }
6491 }
6492out_session:
6493 kfree(res.session);
6494out:
6495 dprintk("<-- %s status= %d\n", __func__, status);
6496 return status;
6497}
6498
99fe60d0 6499/*
fa940720
WAA		 6500 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6501 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6502 */
6503static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6504 .how = SP4_MACH_CRED,
6505 .enforce.u.words = {
6506 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6507 1 << (OP_EXCHANGE_ID - 32) |
6508 1 << (OP_CREATE_SESSION - 32) |
6509 1 << (OP_DESTROY_SESSION - 32) |
6510 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6511 },
6512 .allow.u.words = {
6513 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6514 1 << (OP_LOCKU) |
6515 1 << (OP_COMMIT),
8b5bee2e 6516 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6517 1 << (OP_SECINFO_NO_NAME - 32) |
6518 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6519 1 << (OP_FREE_STATEID - 32) |
6520 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6521 }
6522};
6523
6524/*
6525 * Select the state protection mode for client `clp' given the server results
6526 * from exchange_id in `sp'.
99fe60d0 6527 *
2031cd1a
WAA		 6528 * Returns 0 on success, negative errno otherwise.
6529 */
6530static int nfs4_sp4_select_mode(struct nfs_client *clp,
6531 struct nfs41_state_protection *sp)
6532{
6533 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6534 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6535 1 << (OP_EXCHANGE_ID - 32) |
6536 1 << (OP_CREATE_SESSION - 32) |
6537 1 << (OP_DESTROY_SESSION - 32) |
6538 1 << (OP_DESTROY_CLIENTID - 32)
6539 };
6540 unsigned int i;
6541
6542 if (sp->how == SP4_MACH_CRED) {
6543 /* Print state protect result */
6544 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6545 for (i = 0; i <= LAST_NFS4_OP; i++) {
6546 if (test_bit(i, sp->enforce.u.longs))
6547 dfprintk(MOUNT, " enforce op %d\n", i);
6548 if (test_bit(i, sp->allow.u.longs))
6549 dfprintk(MOUNT, " allow op %d\n", i);
6550 }
6551
6552 /* make sure nothing is on enforce list that isn't supported */
6553 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6554 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6555 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6556 return -EINVAL;
6557 }
6558 }
6559
6560 /*
6561 * Minimal mode - state operations are allowed to use machine
6562 * credential. Note this already happens by default, so the
6563 * client doesn't have to do anything more than the negotiation.
6564 *
6565 * NOTE: we don't care if EXCHANGE_ID is in the list -
6566 * we're already using the machine cred for exchange_id
6567 * and will never use a different cred.
6568 */
6569 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6570 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6571 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6572 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6573 dfprintk(MOUNT, "sp4_mach_cred:\n");
6574 dfprintk(MOUNT, " minimal mode enabled\n");
6575 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6576 } else {
6577 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6578 return -EINVAL;
6579 }
fa940720
WAA		 6580
6581 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6582 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6583 dfprintk(MOUNT, " cleanup mode enabled\n");
6584 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6585 }
8b5bee2e
WAA		 6586
6587 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6588 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6589 dfprintk(MOUNT, " secinfo mode enabled\n");
6590 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6591 }
3787d506
WAA		 6592
6593 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6594 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6595 dfprintk(MOUNT, " stateid mode enabled\n");
6596 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6597 }
8c21c62c
WAA		 6598
6599 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6600 dfprintk(MOUNT, " write mode enabled\n");
6601 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6602 }
6603
6604 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6605 dfprintk(MOUNT, " commit mode enabled\n");
6606 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6607 }
2031cd1a
WAA		 6608 }
6609
6610 return 0;
6611}
6612
6613/*
6614 * _nfs4_proc_exchange_id()
6bbb4ae8 6615 *
2031cd1a 6616 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6617 */
2031cd1a
WAA		 6618static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6619 u32 sp4_how)
99fe60d0
BH		 6620{
6621 nfs4_verifier verifier;
6622 struct nfs41_exchange_id_args args = {
cd93710e 6623 .verifier = &verifier,
99fe60d0 6624 .client = clp,
cd3fadec 6625#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6626 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6627 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6628 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6629#else
6630 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6631 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6632#endif
99fe60d0
BH		 6633 };
6634 struct nfs41_exchange_id_res res = {
32b01310 6635 0
99fe60d0
BH		 6636 };
6637 int status;
6638 struct rpc_message msg = {
6639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6640 .rpc_argp = &args,
6641 .rpc_resp = &res,
6642 .rpc_cred = cred,
6643 };
99fe60d0 6644
f092075d 6645 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6646 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6647 sizeof(args.id));
6bbb4ae8
CL		 6648 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6649 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6650 args.id_len, args.id);
99fe60d0 6651
acdeb69d 6652 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6653 GFP_NOFS);
acdeb69d 6654 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6655 status = -ENOMEM;
6656 goto out;
6657 }
78fe0f41 6658
79d4e1f0 6659 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6660 GFP_NOFS);
177313f1 6661 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6662 status = -ENOMEM;
acdeb69d 6663 goto out_server_owner;
abe9a6d5 6664 }
78fe0f41 6665
bbafffd2 6666 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6667 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6668 status = -ENOMEM;
6669 goto out_server_scope;
6670 }
6671
2031cd1a
WAA		 6672 switch (sp4_how) {
6673 case SP4_NONE:
6674 args.state_protect.how = SP4_NONE;
6675 break;
6676
6677 case SP4_MACH_CRED:
6678 args.state_protect = nfs4_sp4_mach_cred_request;
6679 break;
6680
6681 default:
6682 /* unsupported! */
6683 WARN_ON_ONCE(1);
6684 status = -EINVAL;
6685 goto out_server_scope;
6686 }
6687
1bd714f2 6688 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6689 trace_nfs4_exchange_id(clp, status);
177313f1 6690 if (status == 0)
32b01310 6691 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6692
2031cd1a
WAA		 6693 if (status == 0)
6694 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6695
acdeb69d 6696 if (status == 0) {
32b01310
TM		 6697 clp->cl_clientid = res.clientid;
6698 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6699 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6700 clp->cl_seqid = res.seqid;
6701
acdeb69d
CL		 6702 kfree(clp->cl_serverowner);
6703 clp->cl_serverowner = res.server_owner;
6704 res.server_owner = NULL;
78fe0f41 6705
7d2ed9ac 6706 /* use the most recent implementation id */
59155546
CL		 6707 kfree(clp->cl_implid);
6708 clp->cl_implid = res.impl_id;
7d2ed9ac 6709
177313f1 6710 if (clp->cl_serverscope != NULL &&
79d4e1f0 6711 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6712 res.server_scope)) {
6713 dprintk("%s: server_scope mismatch detected\n",
6714 __func__);
6715 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6716 kfree(clp->cl_serverscope);
6717 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6718 }
6719
177313f1 6720 if (clp->cl_serverscope == NULL) {
79d4e1f0 6721 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6722 goto out;
6723 }
32b01310
TM		 6724 } else
6725 kfree(res.impl_id);
7d2ed9ac 6726
acdeb69d
CL		 6727out_server_owner:
6728 kfree(res.server_owner);
7d2ed9ac 6729out_server_scope:
abe9a6d5
WAA		 6730 kfree(res.server_scope);
6731out:
177313f1 6732 if (clp->cl_implid != NULL)
6bbb4ae8 6733 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6734 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6735 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6736 clp->cl_implid->date.seconds,
6737 clp->cl_implid->date.nseconds);
6bbb4ae8 6738 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6739 return status;
6740}
6741
2031cd1a
WAA		 6742/*
6743 * nfs4_proc_exchange_id()
6744 *
6745 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6746 *
6747 * Since the clientid has expired, all compounds using sessions
6748 * associated with the stale clientid will be returning
6749 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6750 * be in some phase of session reset.
6751 *
6752 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6753 */
6754int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6755{
6756 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6757 int status;
6758
6759 /* try SP4_MACH_CRED if krb5i/p */
6760 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6761 authflavor == RPC_AUTH_GSS_KRB5P) {
6762 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6763 if (!status)
6764 return 0;
6765 }
6766
6767 /* try SP4_NONE */
6768 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6769}
6770
66245539
TM		 6771static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6772 struct rpc_cred *cred)
6773{
6774 struct rpc_message msg = {
6775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6776 .rpc_argp = clp,
6777 .rpc_cred = cred,
6778 };
6779 int status;
6780
6781 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6782 trace_nfs4_destroy_clientid(clp, status);
66245539 6783 if (status)
02c67525 6784 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6785 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6786 return status;
6787}
6788
6789static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6790 struct rpc_cred *cred)
6791{
6792 unsigned int loop;
6793 int ret;
6794
6795 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6796 ret = _nfs4_proc_destroy_clientid(clp, cred);
6797 switch (ret) {
6798 case -NFS4ERR_DELAY:
6799 case -NFS4ERR_CLIENTID_BUSY:
6800 ssleep(1);
6801 break;
6802 default:
6803 return ret;
6804 }
6805 }
6806 return 0;
6807}
6808
6809int nfs4_destroy_clientid(struct nfs_client *clp)
6810{
6811 struct rpc_cred *cred;
6812 int ret = 0;
6813
6814 if (clp->cl_mvops->minor_version < 1)
6815 goto out;
6816 if (clp->cl_exchange_flags == 0)
6817 goto out;
05f4c350
CL		 6818 if (clp->cl_preserve_clid)
6819 goto out;
73d8bde5 6820 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6821 ret = nfs4_proc_destroy_clientid(clp, cred);
6822 if (cred)
6823 put_rpccred(cred);
6824 switch (ret) {
6825 case 0:
6826 case -NFS4ERR_STALE_CLIENTID:
6827 clp->cl_exchange_flags = 0;
6828 }
6829out:
6830 return ret;
6831}
6832
2050f0cc
AA		 6833struct nfs4_get_lease_time_data {
6834 struct nfs4_get_lease_time_args *args;
6835 struct nfs4_get_lease_time_res *res;
6836 struct nfs_client *clp;
6837};
6838
6839static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6840 void *calldata)
6841{
2050f0cc
AA		 6842 struct nfs4_get_lease_time_data *data =
6843 (struct nfs4_get_lease_time_data *)calldata;
6844
6845 dprintk("--> %s\n", __func__);
6846 /* just setup sequence, do not trigger session recovery
6847 since we're invoked within one */
d9afbd1b
TM		 6848 nfs41_setup_sequence(data->clp->cl_session,
6849 &data->args->la_seq_args,
6850 &data->res->lr_seq_res,
6851 task);
2050f0cc
AA		 6852 dprintk("<-- %s\n", __func__);
6853}
6854
6855/*
6856 * Called from nfs4_state_manager thread for session setup, so don't recover
6857 * from sequence operation or clientid errors.
6858 */
6859static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6860{
6861 struct nfs4_get_lease_time_data *data =
6862 (struct nfs4_get_lease_time_data *)calldata;
6863
6864 dprintk("--> %s\n", __func__);
14516c3a
TM		 6865 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6866 return;
2050f0cc
AA		 6867 switch (task->tk_status) {
6868 case -NFS4ERR_DELAY:
6869 case -NFS4ERR_GRACE:
6870 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6871 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6872 task->tk_status = 0;
a8a4ae3a
AA		 6873 /* fall through */
6874 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6875 rpc_restart_call_prepare(task);
2050f0cc
AA		 6876 return;
6877 }
2050f0cc
AA		 6878 dprintk("<-- %s\n", __func__);
6879}
6880
17280175 6881static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6882 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6883 .rpc_call_done = nfs4_get_lease_time_done,
6884};
6885
6886int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6887{
6888 struct rpc_task *task;
6889 struct nfs4_get_lease_time_args args;
6890 struct nfs4_get_lease_time_res res = {
6891 .lr_fsinfo = fsinfo,
6892 };
6893 struct nfs4_get_lease_time_data data = {
6894 .args = &args,
6895 .res = &res,
6896 .clp = clp,
6897 };
6898 struct rpc_message msg = {
6899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6900 .rpc_argp = &args,
6901 .rpc_resp = &res,
6902 };
6903 struct rpc_task_setup task_setup = {
6904 .rpc_client = clp->cl_rpcclient,
6905 .rpc_message = &msg,
6906 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6907 .callback_data = &data,
6908 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6909 };
6910 int status;
6911
a9c92d6b 6912 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6913 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6914 dprintk("--> %s\n", __func__);
6915 task = rpc_run_task(&task_setup);
6916
6917 if (IS_ERR(task))
6918 status = PTR_ERR(task);
6919 else {
6920 status = task->tk_status;
6921 rpc_put_task(task);
6922 }
6923 dprintk("<-- %s return %d\n", __func__, status);
6924
6925 return status;
6926}
6927
fc931582
AA		 6928/*
6929 * Initialize the values to be used by the client in CREATE_SESSION
6930 * If nfs4_init_session set the fore channel request and response sizes,
6931 * use them.
6932 *
6933 * Set the back channel max_resp_sz_cached to zero to force the client to
6934 * always set csa_cachethis to FALSE because the current implementation
6935 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6936 */
6937static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6938{
18aad3d5
AA		 6939 unsigned int max_rqst_sz, max_resp_sz;
6940
6941 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6942 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6943
fc931582 6944 /* Fore channel attributes */
18aad3d5
AA		 6945 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6946 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6947 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6948 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6949
6950 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6951 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6952 __func__,
6953 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6954 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6955
6956 /* Back channel attributes */
fc931582
AA		 6957 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6958 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6959 args->bc_attrs.max_resp_sz_cached = 0;
6960 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6961 args->bc_attrs.max_reqs = 1;
6962
6963 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6964 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6965 __func__,
6966 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6967 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6968 args->bc_attrs.max_reqs);
6969}
6970
43c2e885 6971static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6972{
43c2e885
BF		 6973 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6974 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6975
43c2e885
BF		 6976 if (rcvd->max_resp_sz > sent->max_resp_sz)
6977 return -EINVAL;
6978 /*
6979 * Our requested max_ops is the minimum we need; we're not
6980 * prepared to break up compounds into smaller pieces than that.
6981 * So, no point even trying to continue if the server won't
6982 * cooperate:
6983 */
6984 if (rcvd->max_ops < sent->max_ops)
6985 return -EINVAL;
6986 if (rcvd->max_reqs == 0)
6987 return -EINVAL;
b4b9a0c1
VG		 6988 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6989 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6990 return 0;
8d35301d
AA		 6991}
6992
43c2e885
BF		 6993static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6994{
6995 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6996 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6997
43c2e885
BF		 6998 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6999 return -EINVAL;
7000 if (rcvd->max_resp_sz < sent->max_resp_sz)
7001 return -EINVAL;
7002 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7003 return -EINVAL;
7004 /* These would render the backchannel useless: */
b4b9a0c1 7005 if (rcvd->max_ops != sent->max_ops)
43c2e885 7006 return -EINVAL;
b4b9a0c1 7007 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7008 return -EINVAL;
7009 return 0;
7010}
8d35301d 7011
8d35301d
AA		 7012static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7013 struct nfs4_session *session)
7014{
43c2e885 7015 int ret;
8d35301d 7016
43c2e885
BF		 7017 ret = nfs4_verify_fore_channel_attrs(args, session);
7018 if (ret)
7019 return ret;
7020 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7021}
7022
848f5bda
TM		 7023static int _nfs4_proc_create_session(struct nfs_client *clp,
7024 struct rpc_cred *cred)
fc931582
AA		 7025{
7026 struct nfs4_session *session = clp->cl_session;
7027 struct nfs41_create_session_args args = {
7028 .client = clp,
7029 .cb_program = NFS4_CALLBACK,
7030 };
7031 struct nfs41_create_session_res res = {
7032 .client = clp,
7033 };
7034 struct rpc_message msg = {
7035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7036 .rpc_argp = &args,
7037 .rpc_resp = &res,
848f5bda 7038 .rpc_cred = cred,
fc931582
AA		 7039 };
7040 int status;
7041
7042 nfs4_init_channel_attrs(&args);
0f91421e 7043 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7044
1bd714f2 7045 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7046 trace_nfs4_create_session(clp, status);
fc931582 7047
43095d39 7048 if (!status) {
8d35301d
AA		 7049 /* Verify the session's negotiated channel_attrs values */
7050 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7051 /* Increment the clientid slot sequence id */
7052 clp->cl_seqid++;
7053 }
7054
7055 return status;
7056}
7057
7058/*
7059 * Issues a CREATE_SESSION operation to the server.
7060 * It is the responsibility of the caller to verify the session is
7061 * expired before calling this routine.
7062 */
848f5bda 7063int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7064{
7065 int status;
7066 unsigned *ptr;
fc931582
AA		 7067 struct nfs4_session *session = clp->cl_session;
7068
7069 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7070
848f5bda 7071 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7072 if (status)
7073 goto out;
7074
aacd5537
AA		 7075 /* Init or reset the session slot tables */
7076 status = nfs4_setup_session_slot_tables(session);
7077 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7078 if (status)
7079 goto out;
7080
7081 ptr = (unsigned *)&session->sess_id.data[0];
7082 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7083 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7084out:
7085 dprintk("<-- %s\n", __func__);
7086 return status;
7087}
7088
0f3e66c6
AA		 7089/*
7090 * Issue the over-the-wire RPC DESTROY_SESSION.
7091 * The caller must serialize access to this routine.
7092 */
848f5bda
TM		 7093int nfs4_proc_destroy_session(struct nfs4_session *session,
7094 struct rpc_cred *cred)
0f3e66c6 7095{
848f5bda
TM		 7096 struct rpc_message msg = {
7097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7098 .rpc_argp = session,
7099 .rpc_cred = cred,
7100 };
0f3e66c6 7101 int status = 0;
0f3e66c6
AA		 7102
7103 dprintk("--> nfs4_proc_destroy_session\n");
7104
7105 /* session is still being setup */
7106 if (session->clp->cl_cons_state != NFS_CS_READY)
7107 return status;
7108
1bd714f2 7109 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7110 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7111
7112 if (status)
08106ac7 7113 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7114 "Session has been destroyed regardless...\n", status);
7115
7116 dprintk("<-- nfs4_proc_destroy_session\n");
7117 return status;
7118}
7119
fc01cea9
AA		 7120/*
7121 * Renew the cl_session lease.
7122 */
d5f8d3fe
TM		 7123struct nfs4_sequence_data {
7124 struct nfs_client *clp;
7125 struct nfs4_sequence_args args;
7126 struct nfs4_sequence_res res;
7127};
7128
dc96aef9
AB		 7129static void nfs41_sequence_release(void *data)
7130{
d5f8d3fe
TM		 7131 struct nfs4_sequence_data *calldata = data;
7132 struct nfs_client *clp = calldata->clp;
dc96aef9 7133
7135840f
AB		 7134 if (atomic_read(&clp->cl_count) > 1)
7135 nfs4_schedule_state_renewal(clp);
7136 nfs_put_client(clp);
d5f8d3fe 7137 kfree(calldata);
dc96aef9
AB		 7138}
7139
aa5190d0
TM		 7140static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7141{
7142 switch(task->tk_status) {
7143 case -NFS4ERR_DELAY:
aa5190d0
TM		 7144 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7145 return -EAGAIN;
7146 default:
0400a6b0 7147 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7148 }
7149 return 0;
7150}
7151
dc96aef9 7152static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7153{
d5f8d3fe
TM		 7154 struct nfs4_sequence_data *calldata = data;
7155 struct nfs_client *clp = calldata->clp;
fc01cea9 7156
14516c3a
TM		 7157 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7158 return;
fc01cea9 7159
c6d01c6f 7160 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7161 if (task->tk_status < 0) {
7162 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7163 if (atomic_read(&clp->cl_count) == 1)
7164 goto out;
fc01cea9 7165
aa5190d0
TM		 7166 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7167 rpc_restart_call_prepare(task);
fc01cea9
AA		 7168 return;
7169 }
7170 }
fc01cea9 7171 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7172out:
fc01cea9
AA		 7173 dprintk("<-- %s\n", __func__);
7174}
7175
7176static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7177{
d5f8d3fe
TM		 7178 struct nfs4_sequence_data *calldata = data;
7179 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7180 struct nfs4_sequence_args *args;
7181 struct nfs4_sequence_res *res;
7182
fc01cea9
AA		 7183 args = task->tk_msg.rpc_argp;
7184 res = task->tk_msg.rpc_resp;
7185
d9afbd1b 7186 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7187}
7188
7189static const struct rpc_call_ops nfs41_sequence_ops = {
7190 .rpc_call_done = nfs41_sequence_call_done,
7191 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7192 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7193};
7194
8fe72bac
TM		 7195static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7196 struct rpc_cred *cred,
7197 bool is_privileged)
fc01cea9 7198{
d5f8d3fe 7199 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7200 struct rpc_message msg = {
7201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7202 .rpc_cred = cred,
7203 };
71ac6da9
TM		 7204 struct rpc_task_setup task_setup_data = {
7205 .rpc_client = clp->cl_rpcclient,
7206 .rpc_message = &msg,
8fe72bac 7207 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7208 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7209 };
fc01cea9 7210
7135840f 7211 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7212 return ERR_PTR(-EIO);
dfb4f309 7213 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7214 if (calldata == NULL) {
7135840f 7215 nfs_put_client(clp);
71ac6da9 7216 return ERR_PTR(-ENOMEM);
fc01cea9 7217 }
a9c92d6b 7218 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7219 if (is_privileged)
7220 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7221 msg.rpc_argp = &calldata->args;
7222 msg.rpc_resp = &calldata->res;
7223 calldata->clp = clp;
71ac6da9 7224 task_setup_data.callback_data = calldata;
fc01cea9 7225
71ac6da9
TM		 7226 return rpc_run_task(&task_setup_data);
7227}
7228
2f60ea6b 7229static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7230{
7231 struct rpc_task *task;
7232 int ret = 0;
7233
2f60ea6b
TM		 7234 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7235 return 0;
8fe72bac 7236 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7237 if (IS_ERR(task))
7238 ret = PTR_ERR(task);
7239 else
bf294b41 7240 rpc_put_task_async(task);
71ac6da9
TM		 7241 dprintk("<-- %s status=%d\n", __func__, ret);
7242 return ret;
7243}
7244
7245static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7246{
7247 struct rpc_task *task;
7248 int ret;
7249
8fe72bac 7250 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7251 if (IS_ERR(task)) {
7252 ret = PTR_ERR(task);
7253 goto out;
7254 }
7255 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7256 if (!ret) {
7257 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7258
7259 if (task->tk_status == 0)
7260 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7261 ret = task->tk_status;
b4410c2f 7262 }
71ac6da9
TM		 7263 rpc_put_task(task);
7264out:
7265 dprintk("<-- %s status=%d\n", __func__, ret);
7266 return ret;
fc01cea9
AA		 7267}
7268
fce5c838
RL		 7269struct nfs4_reclaim_complete_data {
7270 struct nfs_client *clp;
7271 struct nfs41_reclaim_complete_args arg;
7272 struct nfs41_reclaim_complete_res res;
7273};
7274
7275static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7276{
7277 struct nfs4_reclaim_complete_data *calldata = data;
7278
d9afbd1b
TM		 7279 nfs41_setup_sequence(calldata->clp->cl_session,
7280 &calldata->arg.seq_args,
7281 &calldata->res.seq_res,
7282 task);
fce5c838
RL		 7283}
7284
aa5190d0
TM		 7285static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7286{
7287 switch(task->tk_status) {
7288 case 0:
7289 case -NFS4ERR_COMPLETE_ALREADY:
7290 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7291 break;
7292 case -NFS4ERR_DELAY:
aa5190d0 7293 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7294 /* fall through */
7295 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7296 return -EAGAIN;
7297 default:
0400a6b0 7298 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7299 }
7300 return 0;
7301}
7302
fce5c838
RL		 7303static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7304{
7305 struct nfs4_reclaim_complete_data *calldata = data;
7306 struct nfs_client *clp = calldata->clp;
7307 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7308
7309 dprintk("--> %s\n", __func__);
14516c3a
TM		 7310 if (!nfs41_sequence_done(task, res))
7311 return;
fce5c838 7312
c6d01c6f 7313 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7314 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7315 rpc_restart_call_prepare(task);
7316 return;
7317 }
fce5c838
RL		 7318 dprintk("<-- %s\n", __func__);
7319}
7320
7321static void nfs4_free_reclaim_complete_data(void *data)
7322{
7323 struct nfs4_reclaim_complete_data *calldata = data;
7324
7325 kfree(calldata);
7326}
7327
7328static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7329 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7330 .rpc_call_done = nfs4_reclaim_complete_done,
7331 .rpc_release = nfs4_free_reclaim_complete_data,
7332};
7333
7334/*
7335 * Issue a global reclaim complete.
7336 */
965e9c23
TM		 7337static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7338 struct rpc_cred *cred)
fce5c838
RL		 7339{
7340 struct nfs4_reclaim_complete_data *calldata;
7341 struct rpc_task *task;
7342 struct rpc_message msg = {
7343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7344 .rpc_cred = cred,
fce5c838
RL		 7345 };
7346 struct rpc_task_setup task_setup_data = {
7347 .rpc_client = clp->cl_rpcclient,
7348 .rpc_message = &msg,
7349 .callback_ops = &nfs4_reclaim_complete_call_ops,
7350 .flags = RPC_TASK_ASYNC,
7351 };
7352 int status = -ENOMEM;
7353
7354 dprintk("--> %s\n", __func__);
8535b2be 7355 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7356 if (calldata == NULL)
7357 goto out;
7358 calldata->clp = clp;
7359 calldata->arg.one_fs = 0;
fce5c838 7360
a9c92d6b 7361 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7362 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7363 msg.rpc_argp = &calldata->arg;
7364 msg.rpc_resp = &calldata->res;
7365 task_setup_data.callback_data = calldata;
7366 task = rpc_run_task(&task_setup_data);
acf82b85 7367 if (IS_ERR(task)) {
fce5c838 7368 status = PTR_ERR(task);
acf82b85
DC		 7369 goto out;
7370 }
c34c32ea
AA		 7371 status = nfs4_wait_for_completion_rpc_task(task);
7372 if (status == 0)
7373 status = task->tk_status;
fce5c838 7374 rpc_put_task(task);
acf82b85 7375 return 0;
fce5c838
RL		 7376out:
7377 dprintk("<-- %s status=%d\n", __func__, status);
7378 return status;
7379}
b1f69b75
AA		 7380
7381static void
7382nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7383{
7384 struct nfs4_layoutget *lgp = calldata;
c31663d4 7385 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7386 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7387
7388 dprintk("--> %s\n", __func__);
c31663d4
FI		 7389 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7390 * right now covering the LAYOUTGET we are about to send.
7391 * However, that is not so catastrophic, and there seems
7392 * to be no way to prevent it completely.
7393 */
6ba7db34 7394 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7395 &lgp->res.seq_res, task))
b1f69b75 7396 return;
cf7d63f1
FI		 7397 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7398 NFS_I(lgp->args.inode)->layout,
7399 lgp->args.ctx->state)) {
7400 rpc_exit(task, NFS4_OK);
cf7d63f1 7401 }
b1f69b75
AA		 7402}
7403
7404static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7405{
7406 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7407 struct inode *inode = lgp->args.inode;
7408 struct nfs_server *server = NFS_SERVER(inode);
7409 struct pnfs_layout_hdr *lo;
7410 struct nfs4_state *state = NULL;
ed7e5423 7411 unsigned long timeo, now, giveup;
b1f69b75 7412
ed7e5423 7413 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7414
6ba7db34 7415 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7416 goto out;
b1f69b75
AA		 7417
7418 switch (task->tk_status) {
7419 case 0:
ee314c2a 7420 goto out;
ed7e5423
BH		 7421 /*
7422 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7423 * (or clients) writing to the same RAID stripe
7424 */
b1f69b75 7425 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7426 /*
7427 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7428 * existing layout before getting a new one).
7429 */
b1f69b75 7430 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7431 timeo = rpc_get_timeout(task->tk_client);
7432 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7433 now = jiffies;
7434 if (time_after(giveup, now)) {
7435 unsigned long delay;
7436
7437 /* Delay for:
7438 * - Not less then NFS4_POLL_RETRY_MIN.
7439 * - One last time a jiffie before we give up
7440 * - exponential backoff (time_now minus start_attempt)
7441 */
7442 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7443 min((giveup - now - 1),
7444 now - lgp->args.timestamp));
7445
7446 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7447 __func__, delay);
7448 rpc_delay(task, delay);
7449 task->tk_status = 0;
7450 rpc_restart_call_prepare(task);
7451 goto out; /* Do not call nfs4_async_handle_error() */
7452 }
ee314c2a
TM		 7453 break;
7454 case -NFS4ERR_EXPIRED:
7455 case -NFS4ERR_BAD_STATEID:
7456 spin_lock(&inode->i_lock);
7457 lo = NFS_I(inode)->layout;
7458 if (!lo || list_empty(&lo->plh_segs)) {
7459 spin_unlock(&inode->i_lock);
7460 /* If the open stateid was bad, then recover it. */
7461 state = lgp->args.ctx->state;
7462 } else {
7463 LIST_HEAD(head);
7464
7465 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7466 spin_unlock(&inode->i_lock);
7467 /* Mark the bad layout state as invalid, then
7468 * retry using the open stateid. */
7469 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7470 }
7471 }
ee314c2a
TM		 7472 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7473 rpc_restart_call_prepare(task);
7474out:
b1f69b75
AA		 7475 dprintk("<-- %s\n", __func__);
7476}
7477
8554116e
IK		 7478static size_t max_response_pages(struct nfs_server *server)
7479{
7480 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7481 return nfs_page_array_len(0, max_resp_sz);
7482}
7483
7484static void nfs4_free_pages(struct page **pages, size_t size)
7485{
7486 int i;
7487
7488 if (!pages)
7489 return;
7490
7491 for (i = 0; i < size; i++) {
7492 if (!pages[i])
7493 break;
7494 __free_page(pages[i]);
7495 }
7496 kfree(pages);
7497}
7498
7499static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7500{
7501 struct page **pages;
7502 int i;
7503
7504 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7505 if (!pages) {
7506 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7507 return NULL;
7508 }
7509
7510 for (i = 0; i < size; i++) {
7511 pages[i] = alloc_page(gfp_flags);
7512 if (!pages[i]) {
7513 dprintk("%s: failed to allocate page\n", __func__);
7514 nfs4_free_pages(pages, size);
7515 return NULL;
7516 }
7517 }
7518
7519 return pages;
7520}
7521
b1f69b75
AA		 7522static void nfs4_layoutget_release(void *calldata)
7523{
7524 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7525 struct inode *inode = lgp->args.inode;
7526 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7527 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7528
7529 dprintk("--> %s\n", __func__);
8554116e 7530 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7531 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7532 put_nfs_open_context(lgp->args.ctx);
7533 kfree(calldata);
7534 dprintk("<-- %s\n", __func__);
7535}
7536
7537static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7538 .rpc_call_prepare = nfs4_layoutget_prepare,
7539 .rpc_call_done = nfs4_layoutget_done,
7540 .rpc_release = nfs4_layoutget_release,
7541};
7542
a0b0a6e3
TM		 7543struct pnfs_layout_segment *
7544nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7545{
a47970ff
WAA		 7546 struct inode *inode = lgp->args.inode;
7547 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7548 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7549 struct rpc_task *task;
7550 struct rpc_message msg = {
7551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7552 .rpc_argp = &lgp->args,
7553 .rpc_resp = &lgp->res,
6ab59344 7554 .rpc_cred = lgp->cred,
b1f69b75
AA		 7555 };
7556 struct rpc_task_setup task_setup_data = {
7557 .rpc_client = server->client,
7558 .rpc_message = &msg,
7559 .callback_ops = &nfs4_layoutget_call_ops,
7560 .callback_data = lgp,
7561 .flags = RPC_TASK_ASYNC,
7562 };
a0b0a6e3 7563 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7564 int status = 0;
7565
7566 dprintk("--> %s\n", __func__);
7567
8554116e
IK		 7568 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7569 if (!lgp->args.layout.pages) {
7570 nfs4_layoutget_release(lgp);
a0b0a6e3 7571 return ERR_PTR(-ENOMEM);
8554116e
IK		 7572 }
7573 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7574 lgp->args.timestamp = jiffies;
8554116e 7575
35124a09 7576 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7577 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7578 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7579
7580 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7581 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7582
b1f69b75
AA		 7583 task = rpc_run_task(&task_setup_data);
7584 if (IS_ERR(task))
a0b0a6e3 7585 return ERR_CAST(task);
b1f69b75 7586 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7587 if (status == 0)
7588 status = task->tk_status;
1037e6ea
TM		 7589 trace_nfs4_layoutget(lgp->args.ctx,
7590 &lgp->args.range,
7591 &lgp->res.range,
7592 status);
085b7a45
WAA		 7593 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7594 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7595 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7596 rpc_put_task(task);
7597 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7598 if (status)
7599 return ERR_PTR(status);
7600 return lseg;
b1f69b75
AA		 7601}
7602
cbe82603
BH		 7603static void
7604nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7605{
7606 struct nfs4_layoutreturn *lrp = calldata;
7607
7608 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7609 nfs41_setup_sequence(lrp->clp->cl_session,
7610 &lrp->args.seq_args,
7611 &lrp->res.seq_res,
7612 task);
cbe82603
BH		 7613}
7614
7615static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7616{
7617 struct nfs4_layoutreturn *lrp = calldata;
7618 struct nfs_server *server;
7619
7620 dprintk("--> %s\n", __func__);
7621
6ba7db34 7622 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7623 return;
7624
7625 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7626 switch (task->tk_status) {
7627 default:
7628 task->tk_status = 0;
7629 case 0:
7630 break;
7631 case -NFS4ERR_DELAY:
7632 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7633 break;
d00c5d43 7634 rpc_restart_call_prepare(task);
cbe82603
BH		 7635 return;
7636 }
cbe82603
BH		 7637 dprintk("<-- %s\n", __func__);
7638}
7639
7640static void nfs4_layoutreturn_release(void *calldata)
7641{
7642 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7643 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7644
7645 dprintk("--> %s\n", __func__);
849b286f
TM		 7646 spin_lock(&lo->plh_inode->i_lock);
7647 if (lrp->res.lrs_present)
7648 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7649 lo->plh_block_lgets--;
7650 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7651 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7652 kfree(calldata);
7653 dprintk("<-- %s\n", __func__);
7654}
7655
7656static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7657 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7658 .rpc_call_done = nfs4_layoutreturn_done,
7659 .rpc_release = nfs4_layoutreturn_release,
7660};
7661
7662int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7663{
7664 struct rpc_task *task;
7665 struct rpc_message msg = {
7666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7667 .rpc_argp = &lrp->args,
7668 .rpc_resp = &lrp->res,
9556000d 7669 .rpc_cred = lrp->cred,
cbe82603
BH		 7670 };
7671 struct rpc_task_setup task_setup_data = {
1771c577 7672 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7673 .rpc_message = &msg,
7674 .callback_ops = &nfs4_layoutreturn_call_ops,
7675 .callback_data = lrp,
7676 };
7677 int status;
7678
7679 dprintk("--> %s\n", __func__);
a9c92d6b 7680 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7681 task = rpc_run_task(&task_setup_data);
7682 if (IS_ERR(task))
7683 return PTR_ERR(task);
7684 status = task->tk_status;
1037e6ea 7685 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7686 dprintk("<-- %s status=%d\n", __func__, status);
7687 rpc_put_task(task);
7688 return status;
7689}
7690
7f11d8d3
AA		 7691/*
7692 * Retrieve the list of Data Server devices from the MDS.
7693 */
7694static int _nfs4_getdevicelist(struct nfs_server *server,
7695 const struct nfs_fh *fh,
7696 struct pnfs_devicelist *devlist)
7697{
7698 struct nfs4_getdevicelist_args args = {
7699 .fh = fh,
7700 .layoutclass = server->pnfs_curr_ld->id,
7701 };
7702 struct nfs4_getdevicelist_res res = {
7703 .devlist = devlist,
7704 };
7705 struct rpc_message msg = {
7706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7707 .rpc_argp = &args,
7708 .rpc_resp = &res,
7709 };
7710 int status;
7711
7712 dprintk("--> %s\n", __func__);
7713 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7714 &res.seq_res, 0);
7715 dprintk("<-- %s status=%d\n", __func__, status);
7716 return status;
7717}
7718
7719int nfs4_proc_getdevicelist(struct nfs_server *server,
7720 const struct nfs_fh *fh,
7721 struct pnfs_devicelist *devlist)
7722{
7723 struct nfs4_exception exception = { };
7724 int err;
7725
7726 do {
7727 err = nfs4_handle_exception(server,
7728 _nfs4_getdevicelist(server, fh, devlist),
7729 &exception);
7730 } while (exception.retry);
7731
7732 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7733 err, devlist->num_devs);
7734
7735 return err;
7736}
7737EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7738
b1f69b75 7739static int
cd5875fe
TM		 7740_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7741 struct pnfs_device *pdev,
7742 struct rpc_cred *cred)
b1f69b75
AA		 7743{
7744 struct nfs4_getdeviceinfo_args args = {
7745 .pdev = pdev,
7746 };
7747 struct nfs4_getdeviceinfo_res res = {
7748 .pdev = pdev,
7749 };
7750 struct rpc_message msg = {
7751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7752 .rpc_argp = &args,
7753 .rpc_resp = &res,
cd5875fe 7754 .rpc_cred = cred,
b1f69b75
AA		 7755 };
7756 int status;
7757
7758 dprintk("--> %s\n", __func__);
7c513058 7759 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7760 dprintk("<-- %s status=%d\n", __func__, status);
7761
7762 return status;
7763}
7764
cd5875fe
TM		 7765int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7766 struct pnfs_device *pdev,
7767 struct rpc_cred *cred)
b1f69b75
AA		 7768{
7769 struct nfs4_exception exception = { };
7770 int err;
7771
7772 do {
7773 err = nfs4_handle_exception(server,
cd5875fe 7774 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7775 &exception);
7776 } while (exception.retry);
7777 return err;
7778}
7779EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7780
863a3c6c
AA		 7781static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7782{
7783 struct nfs4_layoutcommit_data *data = calldata;
7784 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7785 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7786
d9afbd1b
TM		 7787 nfs41_setup_sequence(session,
7788 &data->args.seq_args,
7789 &data->res.seq_res,
7790 task);
863a3c6c
AA		 7791}
7792
7793static void
7794nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7795{
7796 struct nfs4_layoutcommit_data *data = calldata;
7797 struct nfs_server *server = NFS_SERVER(data->args.inode);
7798
6ba7db34 7799 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7800 return;
7801
7802 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7803 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7804 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7805 case -NFS4ERR_BADLAYOUT: /* no layout */
7806 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7807 task->tk_status = 0;
e59d27e0 7808 case 0:
e59d27e0
TM		 7809 break;
7810 default:
7811 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7812 rpc_restart_call_prepare(task);
7813 return;
7814 }
7815 }
863a3c6c
AA		 7816}
7817
7818static void nfs4_layoutcommit_release(void *calldata)
7819{
7820 struct nfs4_layoutcommit_data *data = calldata;
7821
db29c089 7822 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7823 nfs_post_op_update_inode_force_wcc(data->args.inode,
7824 data->res.fattr);
863a3c6c
AA		 7825 put_rpccred(data->cred);
7826 kfree(data);
7827}
7828
7829static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7830 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7831 .rpc_call_done = nfs4_layoutcommit_done,
7832 .rpc_release = nfs4_layoutcommit_release,
7833};
7834
7835int
ef311537 7836nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7837{
7838 struct rpc_message msg = {
7839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7840 .rpc_argp = &data->args,
7841 .rpc_resp = &data->res,
7842 .rpc_cred = data->cred,
7843 };
7844 struct rpc_task_setup task_setup_data = {
7845 .task = &data->task,
7846 .rpc_client = NFS_CLIENT(data->args.inode),
7847 .rpc_message = &msg,
7848 .callback_ops = &nfs4_layoutcommit_ops,
7849 .callback_data = data,
7850 .flags = RPC_TASK_ASYNC,
7851 };
7852 struct rpc_task *task;
7853 int status = 0;
7854
7855 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7856 "lbw: %llu inode %lu\n",
7857 data->task.tk_pid, sync,
7858 data->args.lastbytewritten,
7859 data->args.inode->i_ino);
7860
a9c92d6b 7861 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7862 task = rpc_run_task(&task_setup_data);
7863 if (IS_ERR(task))
7864 return PTR_ERR(task);
ef311537 7865 if (sync == false)
863a3c6c
AA		 7866 goto out;
7867 status = nfs4_wait_for_completion_rpc_task(task);
7868 if (status != 0)
7869 goto out;
7870 status = task->tk_status;
1037e6ea 7871 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7872out:
7873 dprintk("%s: status %d\n", __func__, status);
7874 rpc_put_task(task);
7875 return status;
7876}
fca78d6d 7877
97431204
AA		 7878/**
7879 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7880 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7881 */
fca78d6d
BS		 7882static int
7883_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7884 struct nfs_fsinfo *info,
7885 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7886{
7887 struct nfs41_secinfo_no_name_args args = {
7888 .style = SECINFO_STYLE_CURRENT_FH,
7889 };
7890 struct nfs4_secinfo_res res = {
7891 .flavors = flavors,
7892 };
7893 struct rpc_message msg = {
7894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7895 .rpc_argp = &args,
7896 .rpc_resp = &res,
7897 };
b1b3e136 7898 struct rpc_clnt *clnt = server->client;
7cb852df 7899 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7900 int status;
7901
7902 if (use_integrity) {
7903 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7904 cred = nfs4_get_clid_cred(server->nfs_client);
7905 msg.rpc_cred = cred;
b1b3e136
WAA		 7906 }
7907
7908 dprintk("--> %s\n", __func__);
7909 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7910 &res.seq_res, 0);
7911 dprintk("<-- %s status=%d\n", __func__, status);
7912
7cb852df
WAA		 7913 if (cred)
7914 put_rpccred(cred);
b1b3e136
WAA		 7915
7916 return status;
fca78d6d
BS		 7917}
7918
7919static int
7920nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7921 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7922{
7923 struct nfs4_exception exception = { };
7924 int err;
7925 do {
b1b3e136
WAA		 7926 /* first try using integrity protection */
7927 err = -NFS4ERR_WRONGSEC;
7928
7929 /* try to use integrity protection with machine cred */
7930 if (_nfs4_is_integrity_protected(server->nfs_client))
7931 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7932 flavors, true);
7933
7934 /*
7935 * if unable to use integrity protection, or SECINFO with
7936 * integrity protection returns NFS4ERR_WRONGSEC (which is
7937 * disallowed by spec, but exists in deployed servers) use
7938 * the current filesystem's rpc_client and the user cred.
7939 */
7940 if (err == -NFS4ERR_WRONGSEC)
7941 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7942 flavors, false);
7943
fca78d6d
BS		 7944 switch (err) {
7945 case 0:
7946 case -NFS4ERR_WRONGSEC:
78b19bae 7947 case -ENOTSUPP:
05e9cfb4 7948 goto out;
fca78d6d
BS		 7949 default:
7950 err = nfs4_handle_exception(server, err, &exception);
7951 }
7952 } while (exception.retry);
05e9cfb4 7953out:
fca78d6d
BS		 7954 return err;
7955}
7956
7957static int
7958nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7959 struct nfs_fsinfo *info)
7960{
7961 int err;
7962 struct page *page;
367156d9 7963 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7964 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7965 struct nfs4_secinfo4 *secinfo;
7966 int i;
fca78d6d
BS		 7967
7968 page = alloc_page(GFP_KERNEL);
7969 if (!page) {
7970 err = -ENOMEM;
7971 goto out;
7972 }
7973
7974 flavors = page_address(page);
7975 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7976
7977 /*
7978 * Fall back on "guess and check" method if
7979 * the server doesn't support SECINFO_NO_NAME
7980 */
78b19bae 7981 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 7982 err = nfs4_find_root_sec(server, fhandle, info);
7983 goto out_freepage;
7984 }
7985 if (err)
7986 goto out_freepage;
7987
58a8cf12
WAA		 7988 for (i = 0; i < flavors->num_flavors; i++) {
7989 secinfo = &flavors->flavors[i];
7990
7991 switch (secinfo->flavor) {
7992 case RPC_AUTH_NULL:
7993 case RPC_AUTH_UNIX:
7994 case RPC_AUTH_GSS:
7995 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7996 &secinfo->flavor_info);
7997 break;
7998 default:
7999 flavor = RPC_AUTH_MAXFLAVOR;
8000 break;
8001 }
8002
4d4b69dd
WAA		 8003 if (!nfs_auth_info_match(&server->auth_info, flavor))
8004 flavor = RPC_AUTH_MAXFLAVOR;
8005
58a8cf12
WAA		 8006 if (flavor != RPC_AUTH_MAXFLAVOR) {
8007 err = nfs4_lookup_root_sec(server, fhandle,
8008 info, flavor);
8009 if (!err)
8010 break;
8011 }
8012 }
8013
8014 if (flavor == RPC_AUTH_MAXFLAVOR)
8015 err = -EPERM;
fca78d6d
BS		 8016
8017out_freepage:
8018 put_page(page);
8019 if (err == -EACCES)
8020 return -EPERM;
8021out:
8022 return err;
8023}
1cab0652 8024
ab7cb0df
TM		 8025static int _nfs41_test_stateid(struct nfs_server *server,
8026 nfs4_stateid *stateid,
8027 struct rpc_cred *cred)
7d974794
BS		 8028{
8029 int status;
8030 struct nfs41_test_stateid_args args = {
1cab0652 8031 .stateid = stateid,
7d974794
BS		 8032 };
8033 struct nfs41_test_stateid_res res;
8034 struct rpc_message msg = {
8035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8036 .rpc_argp = &args,
8037 .rpc_resp = &res,
ab7cb0df 8038 .rpc_cred = cred,
7d974794 8039 };
3787d506
WAA		 8040 struct rpc_clnt *rpc_client = server->client;
8041
8042 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8043 &rpc_client, &msg);
1cab0652 8044
38527b15 8045 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8046 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8047 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8048 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8049 &args.seq_args, &res.seq_res);
38527b15
CL		 8050 if (status != NFS_OK) {
8051 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8052 return status;
38527b15
CL		 8053 }
8054 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8055 return -res.status;
7d974794
BS		 8056}
8057
38527b15
CL		 8058/**
8059 * nfs41_test_stateid - perform a TEST_STATEID operation
8060 *
8061 * @server: server / transport on which to perform the operation
8062 * @stateid: state ID to test
ab7cb0df 8063 * @cred: credential
38527b15
CL		 8064 *
8065 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8066 * Otherwise a negative NFS4ERR value is returned if the operation
8067 * failed or the state ID is not currently valid.
8068 */
ab7cb0df
TM		 8069static int nfs41_test_stateid(struct nfs_server *server,
8070 nfs4_stateid *stateid,
8071 struct rpc_cred *cred)
7d974794
BS		 8072{
8073 struct nfs4_exception exception = { };
8074 int err;
8075 do {
ab7cb0df 8076 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8077 if (err != -NFS4ERR_DELAY)
8078 break;
8079 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8080 } while (exception.retry);
8081 return err;
8082}
9aeda35f 8083
7c1d5fae
TM		 8084struct nfs_free_stateid_data {
8085 struct nfs_server *server;
8086 struct nfs41_free_stateid_args args;
9aeda35f 8087 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8088};
8089
8090static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8091{
8092 struct nfs_free_stateid_data *data = calldata;
8093 nfs41_setup_sequence(nfs4_get_session(data->server),
8094 &data->args.seq_args,
8095 &data->res.seq_res,
8096 task);
8097}
8098
8099static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8100{
8101 struct nfs_free_stateid_data *data = calldata;
8102
8103 nfs41_sequence_done(task, &data->res.seq_res);
8104
8105 switch (task->tk_status) {
8106 case -NFS4ERR_DELAY:
8107 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8108 rpc_restart_call_prepare(task);
8109 }
8110}
8111
8112static void nfs41_free_stateid_release(void *calldata)
8113{
8114 kfree(calldata);
8115}
8116
17f26b12 8117static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8118 .rpc_call_prepare = nfs41_free_stateid_prepare,
8119 .rpc_call_done = nfs41_free_stateid_done,
8120 .rpc_release = nfs41_free_stateid_release,
8121};
8122
8123static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8124 nfs4_stateid *stateid,
ab7cb0df 8125 struct rpc_cred *cred,
7c1d5fae
TM		 8126 bool privileged)
8127{
9aeda35f
BS		 8128 struct rpc_message msg = {
8129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8130 .rpc_cred = cred,
9aeda35f 8131 };
7c1d5fae
TM		 8132 struct rpc_task_setup task_setup = {
8133 .rpc_client = server->client,
8134 .rpc_message = &msg,
8135 .callback_ops = &nfs41_free_stateid_ops,
8136 .flags = RPC_TASK_ASYNC,
8137 };
8138 struct nfs_free_stateid_data *data;
9aeda35f 8139
3787d506
WAA		 8140 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8141 &task_setup.rpc_client, &msg);
8142
38527b15 8143 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8144 data = kmalloc(sizeof(*data), GFP_NOFS);
8145 if (!data)
8146 return ERR_PTR(-ENOMEM);
8147 data->server = server;
8148 nfs4_stateid_copy(&data->args.stateid, stateid);
8149
8150 task_setup.callback_data = data;
8151
8152 msg.rpc_argp = &data->args;
8153 msg.rpc_resp = &data->res;
a9c92d6b 8154 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8155 if (privileged)
8156 nfs4_set_sequence_privileged(&data->args.seq_args);
8157
8158 return rpc_run_task(&task_setup);
9aeda35f
BS		 8159}
8160
38527b15
CL		 8161/**
8162 * nfs41_free_stateid - perform a FREE_STATEID operation
8163 *
8164 * @server: server / transport on which to perform the operation
8165 * @stateid: state ID to release
ab7cb0df 8166 * @cred: credential
38527b15
CL		 8167 *
8168 * Returns NFS_OK if the server freed "stateid". Otherwise a
8169 * negative NFS4ERR value is returned.
8170 */
ab7cb0df
TM		 8171static int nfs41_free_stateid(struct nfs_server *server,
8172 nfs4_stateid *stateid,
8173 struct rpc_cred *cred)
9aeda35f 8174{
7c1d5fae
TM		 8175 struct rpc_task *task;
8176 int ret;
8177
ab7cb0df 8178 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8179 if (IS_ERR(task))
8180 return PTR_ERR(task);
8181 ret = rpc_wait_for_completion_task(task);
8182 if (!ret)
8183 ret = task->tk_status;
8184 rpc_put_task(task);
8185 return ret;
9aeda35f 8186}
36281caa 8187
c8b2d0bf
TM		 8188static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8189{
8190 struct rpc_task *task;
ab7cb0df 8191 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8192
ab7cb0df 8193 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8194 nfs4_free_lock_state(server, lsp);
8195 if (IS_ERR(task))
8196 return PTR_ERR(task);
8197 rpc_put_task(task);
8198 return 0;
8199}
8200
36281caa
TM		 8201static bool nfs41_match_stateid(const nfs4_stateid *s1,
8202 const nfs4_stateid *s2)
8203{
2d2f24ad 8204 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8205 return false;
8206
2d2f24ad 8207 if (s1->seqid == s2->seqid)
36281caa 8208 return true;
2d2f24ad 8209 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8210 return true;
8211
8212 return false;
8213}
8214
557134a3
AA		 8215#endif /* CONFIG_NFS_V4_1 */
8216
36281caa
TM		 8217static bool nfs4_match_stateid(const nfs4_stateid *s1,
8218 const nfs4_stateid *s2)
8219{
f597c537 8220 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8221}
8222
8223
17280175 8224static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8225 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8226 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8227 .recover_open = nfs4_open_reclaim,
8228 .recover_lock = nfs4_lock_reclaim,
591d71cb 8229 .establish_clid = nfs4_init_clientid,
05f4c350 8230 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8231};
8232
591d71cb 8233#if defined(CONFIG_NFS_V4_1)
17280175 8234static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8235 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8236 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8237 .recover_open = nfs4_open_reclaim,
8238 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8239 .establish_clid = nfs41_init_clientid,
fce5c838 8240 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8241 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8242};
8243#endif /* CONFIG_NFS_V4_1 */
8244
17280175 8245static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8246 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8247 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8248 .recover_open = nfs4_open_expired,
8249 .recover_lock = nfs4_lock_expired,
8250 .establish_clid = nfs4_init_clientid,
8251};
8252
8253#if defined(CONFIG_NFS_V4_1)
17280175 8254static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8255 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8256 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8257 .recover_open = nfs41_open_expired,
8258 .recover_lock = nfs41_lock_expired,
4d643d1d 8259 .establish_clid = nfs41_init_clientid,
1da177e4 8260};
591d71cb 8261#endif /* CONFIG_NFS_V4_1 */
1da177e4 8262
17280175 8263static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8264 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8265 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8266 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8267};
8268
8269#if defined(CONFIG_NFS_V4_1)
17280175 8270static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8271 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8272 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8273 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8274};
8275#endif
8276
ec011fe8 8277static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8278 .get_locations = _nfs40_proc_get_locations,
44c99933 8279 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8280};
8281
8282#if defined(CONFIG_NFS_V4_1)
8283static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8284 .get_locations = _nfs41_proc_get_locations,
44c99933 8285 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8286};
8287#endif /* CONFIG_NFS_V4_1 */
8288
97dc1359
TM		 8289static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8290 .minor_version = 0,
39c6daae
TM		 8291 .init_caps = NFS_CAP_READDIRPLUS
8292 | NFS_CAP_ATOMIC_OPEN
8293 | NFS_CAP_CHANGE_ATTR
8294 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8295 .init_client = nfs40_init_client,
8296 .shutdown_client = nfs40_shutdown_client,
36281caa 8297 .match_stateid = nfs4_match_stateid,
fca78d6d 8298 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8299 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8300 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8301 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8302 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8303 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8304 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8305};
8306
8307#if defined(CONFIG_NFS_V4_1)
8308static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8309 .minor_version = 1,
39c6daae
TM		 8310 .init_caps = NFS_CAP_READDIRPLUS
8311 | NFS_CAP_ATOMIC_OPEN
8312 | NFS_CAP_CHANGE_ATTR
3b66486c 8313 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8314 | NFS_CAP_STATEID_NFSV41
8315 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8316 .init_client = nfs41_init_client,
8317 .shutdown_client = nfs41_shutdown_client,
36281caa 8318 .match_stateid = nfs41_match_stateid,
fca78d6d 8319 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8320 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8321 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8322 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8323 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8324 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8325 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8326};
8327#endif
8328
42c2c424
SD		 8329#if defined(CONFIG_NFS_V4_2)
8330static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8331 .minor_version = 2,
7017310a
BS		 8332 .init_caps = NFS_CAP_READDIRPLUS
8333 | NFS_CAP_ATOMIC_OPEN
8334 | NFS_CAP_CHANGE_ATTR
8335 | NFS_CAP_POSIX_LOCK
8336 | NFS_CAP_STATEID_NFSV41
8337 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8338 .init_client = nfs41_init_client,
8339 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8340 .match_stateid = nfs41_match_stateid,
8341 .find_root_sec = nfs41_find_root_sec,
7017310a 8342 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8343 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8344 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8345 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8346 .state_renewal_ops = &nfs41_state_renewal_ops,
8347};
8348#endif
8349
97dc1359
TM		 8350const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8351 [0] = &nfs_v4_0_minor_ops,
8352#if defined(CONFIG_NFS_V4_1)
8353 [1] = &nfs_v4_1_minor_ops,
8354#endif
42c2c424
SD		 8355#if defined(CONFIG_NFS_V4_2)
8356 [2] = &nfs_v4_2_minor_ops,
8357#endif
97dc1359
TM		 8358};
8359
17f26b12 8360static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8361 .create = nfs_create,
8362 .lookup = nfs_lookup,
8363 .atomic_open = nfs_atomic_open,
8364 .link = nfs_link,
8365 .unlink = nfs_unlink,
8366 .symlink = nfs_symlink,
8367 .mkdir = nfs_mkdir,
8368 .rmdir = nfs_rmdir,
8369 .mknod = nfs_mknod,
8370 .rename = nfs_rename,
8371 .permission = nfs_permission,
8372 .getattr = nfs_getattr,
8373 .setattr = nfs_setattr,
8374 .getxattr = generic_getxattr,
8375 .setxattr = generic_setxattr,
8376 .listxattr = generic_listxattr,
8377 .removexattr = generic_removexattr,
8378};
8379
92e1d5be 8380static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8381 .permission = nfs_permission,
8382 .getattr = nfs_getattr,
8383 .setattr = nfs_setattr,
64c2ce8b
AK		 8384 .getxattr = generic_getxattr,
8385 .setxattr = generic_setxattr,
8386 .listxattr = generic_listxattr,
8387 .removexattr = generic_removexattr,
6b3b5496
BF		 8388};
8389
509de811 8390const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8391 .version = 4, /* protocol version */
8392 .dentry_ops = &nfs4_dentry_operations,
8393 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8394 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8395 .file_ops = &nfs4_file_operations,
1da177e4 8396 .getroot = nfs4_proc_get_root,
281cad46 8397 .submount = nfs4_submount,
ff9099f2 8398 .try_mount = nfs4_try_mount,
1da177e4
LT		 8399 .getattr = nfs4_proc_getattr,
8400 .setattr = nfs4_proc_setattr,
8401 .lookup = nfs4_proc_lookup,
8402 .access = nfs4_proc_access,
8403 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8404 .create = nfs4_proc_create,
8405 .remove = nfs4_proc_remove,
8406 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8407 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8408 .unlink_done = nfs4_proc_unlink_done,
8409 .rename = nfs4_proc_rename,
d3d4152a 8410 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8411 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8412 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8413 .link = nfs4_proc_link,
8414 .symlink = nfs4_proc_symlink,
8415 .mkdir = nfs4_proc_mkdir,
8416 .rmdir = nfs4_proc_remove,
8417 .readdir = nfs4_proc_readdir,
8418 .mknod = nfs4_proc_mknod,
8419 .statfs = nfs4_proc_statfs,
8420 .fsinfo = nfs4_proc_fsinfo,
8421 .pathconf = nfs4_proc_pathconf,
e9326dca 8422 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8423 .decode_dirent = nfs4_decode_dirent,
8424 .read_setup = nfs4_proc_read_setup,
1abb5088 8425 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8426 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8427 .read_done = nfs4_read_done,
1da177e4 8428 .write_setup = nfs4_proc_write_setup,
57208fa7 8429 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8430 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8431 .write_done = nfs4_write_done,
1da177e4 8432 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8433 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8434 .commit_done = nfs4_commit_done,
1da177e4 8435 .lock = nfs4_proc_lock,
e50a1c2e 8436 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8437 .close_context = nfs4_close_context,
2b484297 8438 .open_context = nfs4_atomic_open,
011e2a7f 8439 .have_delegation = nfs4_have_delegation,
57ec14c5 8440 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8441 .alloc_client = nfs4_alloc_client,
45a52a02 8442 .init_client = nfs4_init_client,
cdb7eced 8443 .free_client = nfs4_free_client,
1179acc6
BS		 8444 .create_server = nfs4_create_server,
8445 .clone_server = nfs_clone_server,
1da177e4
LT		 8446};
8447
64c2ce8b
AK		 8448static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8449 .prefix = XATTR_NAME_NFSV4_ACL,
8450 .list = nfs4_xattr_list_nfs4_acl,
8451 .get = nfs4_xattr_get_nfs4_acl,
8452 .set = nfs4_xattr_set_nfs4_acl,
8453};
8454
8455const struct xattr_handler *nfs4_xattr_handlers[] = {
8456 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8457#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8458 &nfs4_xattr_nfs4_label_handler,
8459#endif
64c2ce8b
AK		 8460 NULL
8461};
8462
1da177e4
LT		 8463/*
8464 * Local variables:
8465 * c-basic-offset: 8
8466 * End:
8467 */
Linux 6.x block layer and io_uring tree(s)