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NFSv4.1: Ensure that we free existing layout segments if we get a new layout
[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
cab92c19 542 if (slot == NULL)
3bd2384a
CL		 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;
a13ce7c6 562 struct nfs4_slot *slot = res->sr_slot;
c10e4498 563 bool send_new_highest_used_slotid = false;
13615871 564
a13ce7c6 565 tbl = slot->table;
e3725ec0 566 session = tbl->session;
ea028ac9 567
35dc1d74 568 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
a13ce7c6 575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
a13ce7c6 579 nfs4_free_slot(tbl, slot);
c10e4498
TM		 580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
b75ad4cd 583out_unlock:
35dc1d74 584 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 585 res->sr_slot = NULL;
c10e4498
TM		 586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 588}
589
f9c96fcc 590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 591{
e3725ec0 592 struct nfs4_session *session;
a13ce7c6 593 struct nfs4_slot *slot = res->sr_slot;
14516c3a 594 struct nfs_client *clp;
ac20d163 595 bool interrupted = false;
85563073 596 int ret = 1;
b0df806c 597
a13ce7c6
TM		 598 if (slot == NULL)
599 goto out_noaction;
468f8613
BS		 600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
b0df806c
AA		 602 goto out;
603
e3725ec0 604 session = slot->table->session;
933602e3 605
ac20d163
TM		 606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
2f92ae34 611 trace_nfs4_sequence_done(session, res);
691daf3b 612 /* Check the SEQUENCE operation status */
14516c3a
TM		 613 switch (res->sr_status) {
614 case 0:
b0df806c 615 /* Update the slot's sequence and clientid lease timer */
933602e3 616 ++slot->seq_nr;
e3725ec0 617 clp = session->clp;
8e63b6a8 618 do_renew_lease(clp, res->sr_timestamp);
0629e370 619 /* Check sequence flags */
b4410c2f
TM		 620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
464ee9f9 622 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 623 break;
ac20d163
TM		 624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
14516c3a
TM		 633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
df2fabff 638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 639 __func__,
df2fabff 640 slot->slot_nr,
933602e3 641 slot->seq_nr);
14516c3a 642 goto out_retry;
85563073
TM		 643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
e8794440
TM		 648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 650 /*
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
e8794440
TM		 658 /*
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
8e63b6a8
TM		 662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
e8794440
TM		 667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
14516c3a
TM		 670 default:
671 /* Just update the slot sequence no. */
933602e3 672 ++slot->seq_nr;
b0df806c
AA		 673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 677 nfs41_sequence_free_slot(res);
a13ce7c6 678out_noaction:
85563073 679 return ret;
e8794440
TM		 680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
14516c3a 686out_retry:
d05dd4e9 687 if (!rpc_restart_call(task))
14516c3a
TM		 688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
b0df806c 691}
f9c96fcc 692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 693
14516c3a
TM		 694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455
TM		 702}
703
dc70d7b3 704int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
ce5039c1
AA		 707 struct rpc_task *task)
708{
fbcd4abc
AA		 709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 711
712 dprintk("--> %s\n", __func__);
ce5039c1 713 /* slot already allocated? */
dfb4f309 714 if (res->sr_slot != NULL)
d9afbd1b 715 goto out_success;
ce5039c1 716
fbcd4abc
AA		 717 tbl = &session->fc_slot_table;
718
69d206b5
TM		 719 task->tk_timeout = 0;
720
fbcd4abc 721 spin_lock(&tbl->slot_tbl_lock);
774d5f14 722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 723 !args->sa_privileged) {
0b1c8fc4 724 /* The state manager will wait until the slot table is empty */
0b1c8fc4 725 dprintk("%s session is draining\n", __func__);
7b939a3f 726 goto out_sleep;
689cf5c1
AB		 727 }
728
2dc03b7f 729 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
fbcd4abc 734 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 735 goto out_sleep;
fbcd4abc
AA		 736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
2b2fa717 739 args->sa_slot = slot;
fbcd4abc 740
e8d92382 741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 742 slot->slot_nr, slot->seq_nr);
fbcd4abc 743
dfb4f309 744 res->sr_slot = slot;
8e63b6a8 745 res->sr_timestamp = jiffies;
2a6e26cd 746 res->sr_status_flags = 0;
fbcd4abc
AA		 747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
2f92ae34 752 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 753out_success:
754 rpc_call_start(task);
ce5039c1 755 return 0;
7b939a3f 756out_sleep:
8fe72bac
TM		 757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
1e1093c7
TM		 759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
ce5039c1 765}
dc70d7b3 766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 767
5a580e0a
CL		 768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
ce5039c1 772{
035168ab 773 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 774 int ret = 0;
775
3bd2384a
CL		 776 if (!session)
777 return nfs40_setup_sequence(server, args, res, task);
035168ab 778
e8d92382 779 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 780 __func__, session->clp, session, res->sr_slot ?
e8d92382 781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 782
9d12b216 783 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 784
ce5039c1
AA		 785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
ce5039c1
AA		 789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
2a3eb2b9 791 struct nfs4_call_sync_data *data = calldata;
6ba7db34 792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 793
035168ab
TM		 794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
d9afbd1b 796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 797}
798
69ab40c4
AA		 799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
69ab40c4 802
14516c3a 803 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 804}
805
17280175 806static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 807 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 808 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 809};
810
3bd2384a
CL		 811#else /* !CONFIG_NFS_V4_1 */
812
9915ea7e
CL		 813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
3bd2384a 818 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 819}
820
821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
823{
3bd2384a 824 return nfs40_sequence_done(task, res);
9915ea7e 825}
3bd2384a
CL		 826
827#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 828
829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
7c513058
BS		 847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
ce5039c1
AA		 849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
8fe72bac 851 struct nfs4_sequence_res *res)
ce5039c1
AA		 852{
853 int ret;
854 struct rpc_task *task;
9915ea7e 855 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 856 struct nfs4_call_sync_data data = {
035168ab 857 .seq_server = server,
ce5039c1
AA		 858 .seq_args = args,
859 .seq_res = res,
ce5039c1
AA		 860 };
861 struct rpc_task_setup task_setup = {
7c513058 862 .rpc_client = clnt,
ce5039c1 863 .rpc_message = msg,
9915ea7e 864 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 865 .callback_data = &data
866 };
867
ce5039c1
AA		 868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
873 rpc_put_task(task);
874 }
875 return ret;
876}
877
fd0c0953 878static
7c513058
BS		 879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
e73b83f2
BS		 881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
a9c92d6b 886 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 888}
cccef3b9 889
38478b24 890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 891{
38478b24 892 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 893
38478b24 894 spin_lock(&dir->i_lock);
359d7d1c 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 896 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 897 nfs_force_lookup_revalidate(dir);
a9a4a87a 898 dir->i_version = cinfo->after;
de242c0b 899 nfs_fscache_invalidate(dir);
38478b24 900 spin_unlock(&dir->i_lock);
1da177e4
LT		 901}
902
e56e0b78 903struct nfs4_opendata {
c6d00e63 904 struct kref kref;
e56e0b78
TM		 905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
cdd4e68b
TM		 907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
6926afd1
TM		 909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
e56e0b78 911 struct nfs_fattr f_attr;
1775fd3e 912 struct nfs4_label *f_label;
e56e0b78 913 struct dentry *dir;
82a2c1b7 914 struct dentry *dentry;
e56e0b78 915 struct nfs4_state_owner *owner;
aac00a8d 916 struct nfs4_state *state;
e56e0b78 917 struct iattr attrs;
26e976a8 918 unsigned long timestamp;
3e309914 919 unsigned int rpc_done : 1;
5bc2afc2 920 unsigned int file_created : 1;
bdeca1b7 921 unsigned int is_recover : 1;
24ac23ab
TM		 922 int rpc_status;
923 int cancelled;
e56e0b78
TM		 924};
925
49f9a0fa
TM		 926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
2ced46c2
TM		 955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
957{
958 p->o_res.f_attr = &p->f_attr;
1775fd3e 959 p->o_res.f_label = p->f_label;
c1d51931
TM		 960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 962 p->o_res.server = p->o_arg.server;
5f657530 963 p->o_res.access_request = p->o_arg.access;
2ced46c2 964 nfs_fattr_init(&p->f_attr);
6926afd1 965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 966}
967
82a2c1b7 968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 970 const struct iattr *attrs,
1775fd3e 971 struct nfs4_label *label,
4a1c0893 972 enum open_claim_type4 claim,
8535b2be 973 gfp_t gfp_mask)
e56e0b78 974{
82a2c1b7 975 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
8535b2be 980 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 981 if (p == NULL)
982 goto err;
14c43f76
DQ		 983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
8535b2be 988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 989 if (p->o_arg.seqid == NULL)
14c43f76 990 goto err_free_label;
82a2c1b7
AV		 991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
e56e0b78
TM		 993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
dc0b027d
TM		 996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1005 }
7539bbab 1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1009 p->o_arg.name = &dentry->d_name;
e56e0b78 1010 p->o_arg.server = server;
aa9c2669 1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1013 p->o_arg.label = label;
49f9a0fa
TM		 1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
4a1c0893
TM		 1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
536e43d1 1027 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1028 __u32 verf[2];
d77d76ff 1029
e56e0b78
TM		 1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1037 }
cdd4e68b
TM		 1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1041 nfs4_init_opendata_res(p);
c6d00e63 1042 kref_init(&p->kref);
e56e0b78 1043 return p;
14c43f76
DQ		 1044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
e56e0b78
TM		 1048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
c6d00e63 1054static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1055{
c6d00e63
TM		 1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
82a2c1b7 1058 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1059
1060 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
c6d00e63 1063 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1064
1065 nfs4_label_free(p->f_label);
1066
c6d00e63 1067 dput(p->dir);
82a2c1b7
AV		 1068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
6926afd1 1070 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1071 kfree(p);
1072}
1073
1074static void nfs4_opendata_put(struct nfs4_opendata *p)
1075{
1076 if (p != NULL)
1077 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1078}
1079
06f814a3
TM		 1080static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1081{
06f814a3
TM		 1082 int ret;
1083
06f814a3 1084 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1085 return ret;
1086}
1087
dc0b027d 1088static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1089{
1090 int ret = 0;
dc0b027d 1091
536e43d1 1092 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1093 goto out;
1094 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1095 case FMODE_READ:
88069f77
TM		 1096 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1097 && state->n_rdonly != 0;
6ee41268
TM		 1098 break;
1099 case FMODE_WRITE:
88069f77
TM		 1100 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1101 && state->n_wronly != 0;
6ee41268
TM		 1102 break;
1103 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1104 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1105 && state->n_rdwr != 0;
6ee41268 1106 }
dc0b027d 1107out:
6ee41268
TM		 1108 return ret;
1109}
1110
dc0b027d 1111static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1112{
652f89f6
TM		 1113 if (delegation == NULL)
1114 return 0;
dc0b027d 1115 if ((delegation->type & fmode) != fmode)
aac00a8d 1116 return 0;
15c831bf 1117 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1118 return 0;
d25be546
TM		 1119 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1120 return 0;
b7391f44 1121 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1122 return 1;
1123}
1124
dc0b027d 1125static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1126{
dc0b027d 1127 switch (fmode) {
e7616923
TM		 1128 case FMODE_WRITE:
1129 state->n_wronly++;
1130 break;
1131 case FMODE_READ:
1132 state->n_rdonly++;
1133 break;
1134 case FMODE_READ|FMODE_WRITE:
1135 state->n_rdwr++;
1136 }
dc0b027d 1137 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1138}
1139
e999e80e
TM		 1140static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1141 nfs4_stateid *stateid)
1142{
1143 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1144 return true;
1145 if (!nfs4_stateid_match_other(stateid, &state->open_stateid))
1146 return true;
1147 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1148 return true;
1149 return false;
1150}
1151
dc0b027d 1152static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1153{
dc0b027d 1154 switch (fmode) {
003707c7
TM		 1155 case FMODE_READ:
1156 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1157 break;
1158 case FMODE_WRITE:
1159 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1160 break;
1161 case FMODE_READ|FMODE_WRITE:
1162 set_bit(NFS_O_RDWR_STATE, &state->flags);
1163 }
e999e80e
TM		 1164 if (!nfs_need_update_open_stateid(state, stateid))
1165 return;
1166 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1167 nfs4_stateid_copy(&state->stateid, stateid);
1168 nfs4_stateid_copy(&state->open_stateid, stateid);
e7616923
TM		 1169}
1170
dc0b027d 1171static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1172{
8bda4e4c 1173 write_seqlock(&state->seqlock);
dc0b027d 1174 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1175 write_sequnlock(&state->seqlock);
003707c7
TM		 1176}
1177
dc0b027d 1178static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1179{
8bda4e4c
TM		 1180 /*
1181 * Protect the call to nfs4_state_set_mode_locked and
1182 * serialise the stateid update
1183 */
1184 write_seqlock(&state->seqlock);
003707c7 1185 if (deleg_stateid != NULL) {
f597c537 1186 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1187 set_bit(NFS_DELEGATED_STATE, &state->flags);
1188 }
1189 if (open_stateid != NULL)
dc0b027d 1190 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1191 write_sequnlock(&state->seqlock);
1192 spin_lock(&state->owner->so_lock);
dc0b027d 1193 update_open_stateflags(state, fmode);
ec073428 1194 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1195}
1196
dc0b027d 1197static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1198{
1199 struct nfs_inode *nfsi = NFS_I(state->inode);
1200 struct nfs_delegation *deleg_cur;
1201 int ret = 0;
1202
dc0b027d 1203 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1204
1205 rcu_read_lock();
1206 deleg_cur = rcu_dereference(nfsi->delegation);
1207 if (deleg_cur == NULL)
1208 goto no_delegation;
1209
1210 spin_lock(&deleg_cur->lock);
17f26b12 1211 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1212 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1213 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1214 goto no_delegation_unlock;
1215
1216 if (delegation == NULL)
1217 delegation = &deleg_cur->stateid;
f597c537 1218 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1219 goto no_delegation_unlock;
1220
b7391f44 1221 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1222 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1223 ret = 1;
1224no_delegation_unlock:
1225 spin_unlock(&deleg_cur->lock);
1226no_delegation:
1227 rcu_read_unlock();
1228
1229 if (!ret && open_stateid != NULL) {
dc0b027d 1230 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1231 ret = 1;
1232 }
1233
1234 return ret;
1235}
1236
1237
dc0b027d 1238static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1239{
1240 struct nfs_delegation *delegation;
1241
1242 rcu_read_lock();
1243 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1244 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1245 rcu_read_unlock();
1246 return;
1247 }
1248 rcu_read_unlock();
57ec14c5 1249 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1250}
1251
6ee41268 1252static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1253{
1254 struct nfs4_state *state = opendata->state;
1255 struct nfs_inode *nfsi = NFS_I(state->inode);
1256 struct nfs_delegation *delegation;
f448badd 1257 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1258 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1259 nfs4_stateid stateid;
1260 int ret = -EAGAIN;
1261
aac00a8d 1262 for (;;) {
dc0b027d 1263 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1264 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1265 if (can_open_cached(state, fmode, open_mode)) {
1266 update_open_stateflags(state, fmode);
6ee41268 1267 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1268 goto out_return_state;
1269 }
1270 spin_unlock(&state->owner->so_lock);
1271 }
34310430
TM		 1272 rcu_read_lock();
1273 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1274 if (!can_open_delegated(delegation, fmode)) {
34310430 1275 rcu_read_unlock();
aac00a8d 1276 break;
34310430 1277 }
aac00a8d 1278 /* Save the delegation */
f597c537 1279 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1280 rcu_read_unlock();
fa332941 1281 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1282 if (!opendata->is_recover) {
1283 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1284 if (ret != 0)
1285 goto out;
1286 }
aac00a8d 1287 ret = -EAGAIN;
34310430
TM		 1288
1289 /* Try to update the stateid using the delegation */
dc0b027d 1290 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1291 goto out_return_state;
aac00a8d 1292 }
aac00a8d
TM		 1293out:
1294 return ERR_PTR(ret);
1295out_return_state:
1296 atomic_inc(&state->count);
1297 return state;
1298}
1299
e23008ec
AA		 1300static void
1301nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1302{
1303 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1304 struct nfs_delegation *delegation;
1305 int delegation_flags = 0;
1306
1307 rcu_read_lock();
1308 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1309 if (delegation)
1310 delegation_flags = delegation->flags;
1311 rcu_read_unlock();
1312 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1313 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1314 "returning a delegation for "
1315 "OPEN(CLAIM_DELEGATE_CUR)\n",
1316 clp->cl_hostname);
1317 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1318 nfs_inode_set_delegation(state->inode,
1319 data->owner->so_cred,
1320 &data->o_res);
1321 else
1322 nfs_inode_reclaim_delegation(state->inode,
1323 data->owner->so_cred,
1324 &data->o_res);
1325}
1326
1327/*
1328 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1329 * and update the nfs4_state.
1330 */
1331static struct nfs4_state *
1332_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1333{
1334 struct inode *inode = data->state->inode;
1335 struct nfs4_state *state = data->state;
1336 int ret;
1337
d2bfda2e
WAA		 1338 if (!data->rpc_done) {
1339 if (data->rpc_status) {
1340 ret = data->rpc_status;
1341 goto err;
1342 }
1343 /* cached opens have already been processed */
1344 goto update;
e23008ec
AA		 1345 }
1346
e23008ec
AA		 1347 ret = nfs_refresh_inode(inode, &data->f_attr);
1348 if (ret)
1349 goto err;
1350
1351 if (data->o_res.delegation_type != 0)
1352 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1353update:
e23008ec
AA		 1354 update_open_stateid(state, &data->o_res.stateid, NULL,
1355 data->o_arg.fmode);
d49f042a 1356 atomic_inc(&state->count);
e23008ec
AA		 1357
1358 return state;
1359err:
1360 return ERR_PTR(ret);
1361
1362}
1363
1364static struct nfs4_state *
1365_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1366{
1367 struct inode *inode;
1368 struct nfs4_state *state = NULL;
1b370bc2 1369 int ret;
24ac23ab 1370
aac00a8d 1371 if (!data->rpc_done) {
6ee41268 1372 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1373 goto out;
1374 }
1375
1b370bc2 1376 ret = -EAGAIN;
24ac23ab 1377 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1378 goto err;
1775fd3e 1379 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1380 ret = PTR_ERR(inode);
03f28e3a 1381 if (IS_ERR(inode))
1b370bc2
TM		 1382 goto err;
1383 ret = -ENOMEM;
24ac23ab
TM		 1384 state = nfs4_get_open_state(inode, data->owner);
1385 if (state == NULL)
1b370bc2 1386 goto err_put_inode;
e23008ec
AA		 1387 if (data->o_res.delegation_type != 0)
1388 nfs4_opendata_check_deleg(data, state);
34310430 1389 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1390 data->o_arg.fmode);
24ac23ab 1391 iput(inode);
aac00a8d 1392out:
7aa262b5 1393 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1394 return state;
1b370bc2
TM		 1395err_put_inode:
1396 iput(inode);
1397err:
1398 return ERR_PTR(ret);
24ac23ab
TM		 1399}
1400
e23008ec
AA		 1401static struct nfs4_state *
1402nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1403{
1404 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1405 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1406 return _nfs4_opendata_to_nfs4_state(data);
1407}
1408
864472e9
TM		 1409static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1410{
1411 struct nfs_inode *nfsi = NFS_I(state->inode);
1412 struct nfs_open_context *ctx;
1413
1414 spin_lock(&state->inode->i_lock);
1415 list_for_each_entry(ctx, &nfsi->open_files, list) {
1416 if (ctx->state != state)
1417 continue;
1418 get_nfs_open_context(ctx);
1419 spin_unlock(&state->inode->i_lock);
1420 return ctx;
1421 }
1422 spin_unlock(&state->inode->i_lock);
1423 return ERR_PTR(-ENOENT);
1424}
1425
4a1c0893
TM		 1426static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1427 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1428{
1429 struct nfs4_opendata *opendata;
1430
4a1c0893 1431 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1432 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1433 if (opendata == NULL)
1434 return ERR_PTR(-ENOMEM);
1435 opendata->state = state;
1436 atomic_inc(&state->count);
1437 return opendata;
1438}
1439
dc0b027d 1440static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1441{
2ced46c2 1442 struct nfs4_state *newstate;
864472e9
TM		 1443 int ret;
1444
dc0b027d
TM		 1445 opendata->o_arg.open_flags = 0;
1446 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1447 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1448 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1449 nfs4_init_opendata_res(opendata);
b257957e 1450 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1451 if (ret != 0)
1452 return ret;
2ced46c2 1453 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1454 if (IS_ERR(newstate))
1455 return PTR_ERR(newstate);
643168c2 1456 nfs4_close_state(newstate, fmode);
2ced46c2 1457 *res = newstate;
864472e9
TM		 1458 return 0;
1459}
1460
1461static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1462{
864472e9 1463 struct nfs4_state *newstate;
864472e9
TM		 1464 int ret;
1465
1466 /* memory barrier prior to reading state->n_* */
2ced46c2 1467 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1468 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1469 smp_rmb();
1470 if (state->n_rdwr != 0) {
b0ed9dbc 1471 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1472 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1473 if (ret != 0)
1474 return ret;
2ced46c2
TM		 1475 if (newstate != state)
1476 return -ESTALE;
864472e9
TM		 1477 }
1478 if (state->n_wronly != 0) {
b0ed9dbc 1479 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1480 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1481 if (ret != 0)
1482 return ret;
2ced46c2
TM		 1483 if (newstate != state)
1484 return -ESTALE;
864472e9
TM		 1485 }
1486 if (state->n_rdonly != 0) {
b0ed9dbc 1487 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1488 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1489 if (ret != 0)
1490 return ret;
2ced46c2
TM		 1491 if (newstate != state)
1492 return -ESTALE;
864472e9 1493 }
1ac7e2fd
TM		 1494 /*
1495 * We may have performed cached opens for all three recoveries.
1496 * Check if we need to update the current stateid.
1497 */
1498 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1499 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1500 write_seqlock(&state->seqlock);
1ac7e2fd 1501 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1502 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1503 write_sequnlock(&state->seqlock);
1ac7e2fd 1504 }
864472e9
TM		 1505 return 0;
1506}
1507
1da177e4
LT		 1508/*
1509 * OPEN_RECLAIM:
1510 * reclaim state on the server after a reboot.
1da177e4 1511 */
539cd03a 1512static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1513{
1ac7e2fd 1514 struct nfs_delegation *delegation;
864472e9 1515 struct nfs4_opendata *opendata;
dc0b027d 1516 fmode_t delegation_type = 0;
1da177e4
LT		 1517 int status;
1518
4a1c0893
TM		 1519 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1520 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1521 if (IS_ERR(opendata))
1522 return PTR_ERR(opendata);
1ac7e2fd
TM		 1523 rcu_read_lock();
1524 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1525 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1526 delegation_type = delegation->type;
1ac7e2fd 1527 rcu_read_unlock();
864472e9
TM		 1528 opendata->o_arg.u.delegation_type = delegation_type;
1529 status = nfs4_open_recover(opendata, state);
c6d00e63 1530 nfs4_opendata_put(opendata);
1da177e4
LT		 1531 return status;
1532}
1533
539cd03a 1534static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1535{
1536 struct nfs_server *server = NFS_SERVER(state->inode);
1537 struct nfs4_exception exception = { };
1538 int err;
1539 do {
539cd03a 1540 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1541 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1542 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1543 continue;
168667c4 1544 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1545 break;
1546 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1547 } while (exception.retry);
1548 return err;
1549}
1550
864472e9
TM		 1551static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1552{
1553 struct nfs_open_context *ctx;
1554 int ret;
1555
1556 ctx = nfs4_state_find_open_context(state);
1557 if (IS_ERR(ctx))
91876b13 1558 return -EAGAIN;
539cd03a 1559 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1560 put_nfs_open_context(ctx);
1561 return ret;
1562}
1563
db4f2e63 1564static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1565{
be76b5b6
TM		 1566 switch (err) {
1567 default:
1568 printk(KERN_ERR "NFS: %s: unhandled error "
1569 "%d.\n", __func__, err);
1570 case 0:
1571 case -ENOENT:
1572 case -ESTALE:
1573 break;
1574 case -NFS4ERR_BADSESSION:
1575 case -NFS4ERR_BADSLOT:
1576 case -NFS4ERR_BAD_HIGH_SLOT:
1577 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1578 case -NFS4ERR_DEADSESSION:
1579 set_bit(NFS_DELEGATED_STATE, &state->flags);
1580 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1581 return -EAGAIN;
1582 case -NFS4ERR_STALE_CLIENTID:
1583 case -NFS4ERR_STALE_STATEID:
1584 set_bit(NFS_DELEGATED_STATE, &state->flags);
1585 case -NFS4ERR_EXPIRED:
1586 /* Don't recall a delegation if it was lost */
1587 nfs4_schedule_lease_recovery(server->nfs_client);
1588 return -EAGAIN;
352297b9
CL		 1589 case -NFS4ERR_MOVED:
1590 nfs4_schedule_migration_recovery(server);
1591 return -EAGAIN;
8ef2f8d4
CL		 1592 case -NFS4ERR_LEASE_MOVED:
1593 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1594 return -EAGAIN;
be76b5b6
TM		 1595 case -NFS4ERR_DELEG_REVOKED:
1596 case -NFS4ERR_ADMIN_REVOKED:
1597 case -NFS4ERR_BAD_STATEID:
db4f2e63 1598 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1599 nfs_inode_find_state_and_recover(state->inode,
1600 stateid);
1601 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1602 return 0;
1603 case -NFS4ERR_DELAY:
1604 case -NFS4ERR_GRACE:
1605 set_bit(NFS_DELEGATED_STATE, &state->flags);
1606 ssleep(1);
1607 return -EAGAIN;
db4f2e63
TM		 1608 case -ENOMEM:
1609 case -NFS4ERR_DENIED:
1610 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1611 return 0;
be76b5b6 1612 }
1da177e4
LT		 1613 return err;
1614}
1615
db4f2e63
TM		 1616int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1617{
1618 struct nfs_server *server = NFS_SERVER(state->inode);
1619 struct nfs4_opendata *opendata;
1620 int err;
1621
1622 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1623 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1624 if (IS_ERR(opendata))
1625 return PTR_ERR(opendata);
1626 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1627 err = nfs4_open_recover(opendata, state);
1628 nfs4_opendata_put(opendata);
1629 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1630}
1631
be05c860
CL		 1632static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1633{
1634 struct nfs4_opendata *data = calldata;
1635
17ead6c8
TM		 1636 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1637 &data->c_res.seq_res, task);
be05c860
CL		 1638}
1639
cdd4e68b
TM		 1640static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1641{
1642 struct nfs4_opendata *data = calldata;
1643
17ead6c8 1644 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1645
cdd4e68b 1646 data->rpc_status = task->tk_status;
26e976a8 1647 if (data->rpc_status == 0) {
f597c537 1648 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1649 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1650 renew_lease(data->o_res.server, data->timestamp);
3e309914 1651 data->rpc_done = 1;
26e976a8 1652 }
cdd4e68b
TM		 1653}
1654
1655static void nfs4_open_confirm_release(void *calldata)
1656{
1657 struct nfs4_opendata *data = calldata;
1658 struct nfs4_state *state = NULL;
1659
1660 /* If this request hasn't been cancelled, do nothing */
1661 if (data->cancelled == 0)
1662 goto out_free;
1663 /* In case of error, no cleanup! */
3e309914 1664 if (!data->rpc_done)
cdd4e68b 1665 goto out_free;
cdd4e68b 1666 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1667 if (!IS_ERR(state))
643168c2 1668 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1669out_free:
c6d00e63 1670 nfs4_opendata_put(data);
cdd4e68b
TM		 1671}
1672
1673static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1674 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1675 .rpc_call_done = nfs4_open_confirm_done,
1676 .rpc_release = nfs4_open_confirm_release,
1677};
1678
1679/*
1680 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1681 */
1682static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1683{
1684 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1685 struct rpc_task *task;
5138fde0
TM		 1686 struct rpc_message msg = {
1687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1688 .rpc_argp = &data->c_arg,
1689 .rpc_resp = &data->c_res,
1690 .rpc_cred = data->owner->so_cred,
1691 };
c970aa85
TM		 1692 struct rpc_task_setup task_setup_data = {
1693 .rpc_client = server->client,
5138fde0 1694 .rpc_message = &msg,
c970aa85
TM		 1695 .callback_ops = &nfs4_open_confirm_ops,
1696 .callback_data = data,
101070ca 1697 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1698 .flags = RPC_TASK_ASYNC,
1699 };
1da177e4
LT		 1700 int status;
1701
17ead6c8 1702 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1703 kref_get(&data->kref);
3e309914
TM		 1704 data->rpc_done = 0;
1705 data->rpc_status = 0;
5138fde0 1706 data->timestamp = jiffies;
c970aa85 1707 task = rpc_run_task(&task_setup_data);
7a1218a2 1708 if (IS_ERR(task))
cdd4e68b 1709 return PTR_ERR(task);
cdd4e68b
TM		 1710 status = nfs4_wait_for_completion_rpc_task(task);
1711 if (status != 0) {
1712 data->cancelled = 1;
1713 smp_wmb();
1714 } else
1715 status = data->rpc_status;
e6b3c4db 1716 rpc_put_task(task);
1da177e4
LT		 1717 return status;
1718}
1719
24ac23ab 1720static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1721{
24ac23ab
TM		 1722 struct nfs4_opendata *data = calldata;
1723 struct nfs4_state_owner *sp = data->owner;
549b19cc 1724 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1725
24ac23ab 1726 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1727 goto out_wait;
aac00a8d
TM		 1728 /*
1729 * Check if we still need to send an OPEN call, or if we can use
1730 * a delegation instead.
1731 */
1732 if (data->state != NULL) {
1733 struct nfs_delegation *delegation;
1734
dc0b027d 1735 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1736 goto out_no_action;
aac00a8d
TM		 1737 rcu_read_lock();
1738 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1739 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1740 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1741 can_open_delegated(delegation, data->o_arg.fmode))
1742 goto unlock_no_action;
aac00a8d
TM		 1743 rcu_read_unlock();
1744 }
95b72eb0 1745 /* Update client id. */
549b19cc 1746 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1747 switch (data->o_arg.claim) {
1748 case NFS4_OPEN_CLAIM_PREVIOUS:
1749 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1750 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1751 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1752 case NFS4_OPEN_CLAIM_FH:
1753 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1754 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1755 }
26e976a8 1756 data->timestamp = jiffies;
035168ab 1757 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1758 &data->o_arg.seq_args,
2240a9e2
TM		 1759 &data->o_res.seq_res,
1760 task) != 0)
1761 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1762
1763 /* Set the create mode (note dependency on the session type) */
1764 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1765 if (data->o_arg.open_flags & O_EXCL) {
1766 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1767 if (nfs4_has_persistent_session(clp))
1768 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1769 else if (clp->cl_mvops->minor_version > 0)
1770 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1771 }
6ee41268 1772 return;
652f89f6
TM		 1773unlock_no_action:
1774 rcu_read_unlock();
6ee41268
TM		 1775out_no_action:
1776 task->tk_action = NULL;
c8da19b9 1777out_wait:
b75ad4cd 1778 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1779}
1780
24ac23ab
TM		 1781static void nfs4_open_done(struct rpc_task *task, void *calldata)
1782{
1783 struct nfs4_opendata *data = calldata;
1da177e4 1784
24ac23ab 1785 data->rpc_status = task->tk_status;
d898528c 1786
14516c3a
TM		 1787 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1788 return;
d898528c 1789
24ac23ab 1790 if (task->tk_status == 0) {
807d66d8
TM		 1791 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1792 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1793 case S_IFREG:
1794 break;
1795 case S_IFLNK:
24ac23ab 1796 data->rpc_status = -ELOOP;
6f926b5b
TM		 1797 break;
1798 case S_IFDIR:
24ac23ab 1799 data->rpc_status = -EISDIR;
6f926b5b
TM		 1800 break;
1801 default:
24ac23ab 1802 data->rpc_status = -ENOTDIR;
807d66d8 1803 }
6f926b5b 1804 }
26e976a8 1805 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1806 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1807 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1808 }
3e309914 1809 data->rpc_done = 1;
24ac23ab 1810}
6f926b5b 1811
24ac23ab
TM		 1812static void nfs4_open_release(void *calldata)
1813{
1814 struct nfs4_opendata *data = calldata;
1815 struct nfs4_state *state = NULL;
1816
1817 /* If this request hasn't been cancelled, do nothing */
1818 if (data->cancelled == 0)
1819 goto out_free;
1820 /* In case of error, no cleanup! */
3e309914 1821 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1822 goto out_free;
1823 /* In case we need an open_confirm, no cleanup! */
1824 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1825 goto out_free;
24ac23ab 1826 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1827 if (!IS_ERR(state))
643168c2 1828 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1829out_free:
c6d00e63 1830 nfs4_opendata_put(data);
24ac23ab
TM		 1831}
1832
1833static const struct rpc_call_ops nfs4_open_ops = {
1834 .rpc_call_prepare = nfs4_open_prepare,
1835 .rpc_call_done = nfs4_open_done,
1836 .rpc_release = nfs4_open_release,
1837};
1838
b257957e 1839static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1840{
1841 struct inode *dir = data->dir->d_inode;
1842 struct nfs_server *server = NFS_SERVER(dir);
1843 struct nfs_openargs *o_arg = &data->o_arg;
1844 struct nfs_openres *o_res = &data->o_res;
1845 struct rpc_task *task;
5138fde0
TM		 1846 struct rpc_message msg = {
1847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1848 .rpc_argp = o_arg,
1849 .rpc_resp = o_res,
1850 .rpc_cred = data->owner->so_cred,
1851 };
c970aa85
TM		 1852 struct rpc_task_setup task_setup_data = {
1853 .rpc_client = server->client,
5138fde0 1854 .rpc_message = &msg,
c970aa85
TM		 1855 .callback_ops = &nfs4_open_ops,
1856 .callback_data = data,
101070ca 1857 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1858 .flags = RPC_TASK_ASYNC,
1859 };
24ac23ab
TM		 1860 int status;
1861
a9c92d6b 1862 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1863 kref_get(&data->kref);
3e309914
TM		 1864 data->rpc_done = 0;
1865 data->rpc_status = 0;
2ced46c2 1866 data->cancelled = 0;
bdeca1b7
TM		 1867 data->is_recover = 0;
1868 if (isrecover) {
8fe72bac 1869 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1870 data->is_recover = 1;
1871 }
c970aa85 1872 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1873 if (IS_ERR(task))
1874 return PTR_ERR(task);
1875 status = nfs4_wait_for_completion_rpc_task(task);
1876 if (status != 0) {
1877 data->cancelled = 1;
1878 smp_wmb();
1879 } else
1880 status = data->rpc_status;
1881 rpc_put_task(task);
1882
1883 return status;
1884}
1885
1886static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1887{
1888 struct inode *dir = data->dir->d_inode;
1889 struct nfs_openres *o_res = &data->o_res;
1890 int status;
1891
1892 status = nfs4_run_open_task(data, 1);
1893 if (status != 0 || !data->rpc_done)
1894 return status;
1895
6926afd1
TM		 1896 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1897
b257957e
AB		 1898 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1899 status = _nfs4_proc_open_confirm(data);
1900 if (status != 0)
1901 return status;
1902 }
1903
1904 return status;
1905}
1906
6168f62c
WAA		 1907static int nfs4_opendata_access(struct rpc_cred *cred,
1908 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1909 struct nfs4_state *state, fmode_t fmode,
1910 int openflags)
6168f62c
WAA		 1911{
1912 struct nfs_access_entry cache;
1913 u32 mask;
1914
1915 /* access call failed or for some reason the server doesn't
1916 * support any access modes -- defer access call until later */
1917 if (opendata->o_res.access_supported == 0)
1918 return 0;
1919
1920 mask = 0;
bbd3a8ee 1921 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1922 * write mode bits, but POSIX allows the creating process to write.
1923 * use openflags to check for exec, because fmode won't
1924 * always have FMODE_EXEC set when file open for exec. */
1925 if (openflags & __FMODE_EXEC) {
1926 /* ONLY check for exec rights */
1927 mask = MAY_EXEC;
1928 } else if (fmode & FMODE_READ)
1929 mask = MAY_READ;
6168f62c
WAA		 1930
1931 cache.cred = cred;
1932 cache.jiffies = jiffies;
1933 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1934 nfs_access_add_cache(state->inode, &cache);
1935
bbd3a8ee 1936 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1937 return 0;
1938
1939 /* even though OPEN succeeded, access is denied. Close the file */
1940 nfs4_close_state(state, fmode);
998f40b5 1941 return -EACCES;
6168f62c
WAA		 1942}
1943
b257957e
AB		 1944/*
1945 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1946 */
1947static int _nfs4_proc_open(struct nfs4_opendata *data)
1948{
1949 struct inode *dir = data->dir->d_inode;
1950 struct nfs_server *server = NFS_SERVER(dir);
1951 struct nfs_openargs *o_arg = &data->o_arg;
1952 struct nfs_openres *o_res = &data->o_res;
1953 int status;
1954
1955 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1956 if (!data->rpc_done)
1957 return status;
1958 if (status != 0) {
1959 if (status == -NFS4ERR_BADNAME &&
1960 !(o_arg->open_flags & O_CREAT))
1961 return -ENOENT;
24ac23ab 1962 return status;
08ef7bd3 1963 }
24ac23ab 1964
6926afd1
TM		 1965 nfs_fattr_map_and_free_names(server, &data->f_attr);
1966
5bc2afc2 1967 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1968 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1969 if (o_arg->open_flags & O_EXCL)
1970 data->file_created = 1;
1971 else if (o_res->cinfo.before != o_res->cinfo.after)
1972 data->file_created = 1;
1973 }
0df5dd4a
TM		 1974 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1975 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1976 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1977 status = _nfs4_proc_open_confirm(data);
1da177e4 1978 if (status != 0)
24ac23ab 1979 return status;
1da177e4
LT		 1980 }
1981 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1982 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1983 return 0;
1da177e4
LT		 1984}
1985
d83217c1
AA		 1986static int nfs4_recover_expired_lease(struct nfs_server *server)
1987{
1988 return nfs4_client_recover_expired_lease(server->nfs_client);
1989}
1990
1da177e4
LT		 1991/*
1992 * OPEN_EXPIRED:
1993 * reclaim state on the server after a network partition.
1994 * Assumes caller holds the appropriate lock
1995 */
539cd03a 1996static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1997{
e56e0b78 1998 struct nfs4_opendata *opendata;
864472e9 1999 int ret;
1da177e4 2000
4a1c0893 2001 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2002 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2003 if (IS_ERR(opendata))
2004 return PTR_ERR(opendata);
864472e9 2005 ret = nfs4_open_recover(opendata, state);
35d05778 2006 if (ret == -ESTALE)
3d4ff43d 2007 d_drop(ctx->dentry);
c6d00e63 2008 nfs4_opendata_put(opendata);
864472e9 2009 return ret;
1da177e4
LT		 2010}
2011
a9ed2e25 2012static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2013{
539cd03a 2014 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2015 struct nfs4_exception exception = { };
2016 int err;
2017
2018 do {
539cd03a 2019 err = _nfs4_open_expired(ctx, state);
42113a75 2020 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2021 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2022 continue;
a9ed2e25
TM		 2023 switch (err) {
2024 default:
2025 goto out;
2026 case -NFS4ERR_GRACE:
2027 case -NFS4ERR_DELAY:
2028 nfs4_handle_exception(server, err, &exception);
2029 err = 0;
2030 }
202b50dc 2031 } while (exception.retry);
a9ed2e25 2032out:
202b50dc
TM		 2033 return err;
2034}
2035
1da177e4
LT		 2036static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2037{
1da177e4 2038 struct nfs_open_context *ctx;
864472e9 2039 int ret;
1da177e4 2040
864472e9
TM		 2041 ctx = nfs4_state_find_open_context(state);
2042 if (IS_ERR(ctx))
91876b13 2043 return -EAGAIN;
539cd03a 2044 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2045 put_nfs_open_context(ctx);
2046 return ret;
1da177e4
LT		 2047}
2048
f062eb6c 2049#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2050static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2051{
f062eb6c 2052 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2053 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2054 struct nfs_delegation *delegation;
2055 struct rpc_cred *cred = NULL;
2056 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2057
2058 /* If a state reset has been done, test_stateid is unneeded */
2059 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2060 return;
2061
ab7cb0df
TM		 2062 /* Get the delegation credential for use by test/free_stateid */
2063 rcu_read_lock();
2064 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2065 if (delegation != NULL &&
2066 nfs4_stateid_match(&delegation->stateid, stateid)) {
2067 cred = get_rpccred(delegation->cred);
2068 rcu_read_unlock();
2069 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2070 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2071 } else
2072 rcu_read_unlock();
2073
3e60ffdd
CL		 2074 if (status != NFS_OK) {
2075 /* Free the stateid unless the server explicitly
2076 * informs us the stateid is unrecognized. */
2077 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2078 nfs41_free_stateid(server, stateid, cred);
6938867e 2079 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2080
6938867e
BS		 2081 write_seqlock(&state->seqlock);
2082 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2083 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2084 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2085 }
ab7cb0df
TM		 2086
2087 if (cred != NULL)
2088 put_rpccred(cred);
3e60ffdd
CL		 2089}
2090
2091/**
2092 * nfs41_check_open_stateid - possibly free an open stateid
2093 *
2094 * @state: NFSv4 state for an inode
2095 *
2096 * Returns NFS_OK if recovery for this stateid is now finished.
2097 * Otherwise a negative NFS4ERR value is returned.
2098 */
2099static int nfs41_check_open_stateid(struct nfs4_state *state)
2100{
2101 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2102 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2103 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2104 int status;
2105
2106 /* If a state reset has been done, test_stateid is unneeded */
2107 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2108 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2109 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2110 return -NFS4ERR_BAD_STATEID;
2111
ab7cb0df 2112 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2113 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2114 if (status != NFS_OK) {
2115 /* Free the stateid unless the server explicitly
2116 * informs us the stateid is unrecognized. */
2117 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2118 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2119
2120 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2121 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2122 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2123 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2124 }
2125 return status;
2126}
2127
2128static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2129{
eb64cf96 2130 int status;
b01dd1d8 2131
3e60ffdd
CL		 2132 nfs41_clear_delegation_stateid(state);
2133 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2134 if (status != NFS_OK)
2135 status = nfs4_open_expired(sp, state);
2136 return status;
f062eb6c
BS		 2137}
2138#endif
2139
aa53ed54
JL		 2140/*
2141 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2142 * fields corresponding to attributes that were used to store the verifier.
2143 * Make sure we clobber those fields in the later setattr call
2144 */
2145static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2146{
2147 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2148 !(sattr->ia_valid & ATTR_ATIME_SET))
2149 sattr->ia_valid |= ATTR_ATIME;
2150
2151 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2152 !(sattr->ia_valid & ATTR_MTIME_SET))
2153 sattr->ia_valid |= ATTR_MTIME;
2154}
2155
c21443c2
TM		 2156static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2157 fmode_t fmode,
2158 int flags,
3efb9722 2159 struct nfs_open_context *ctx)
c21443c2
TM		 2160{
2161 struct nfs4_state_owner *sp = opendata->owner;
2162 struct nfs_server *server = sp->so_server;
275bb307 2163 struct dentry *dentry;
c21443c2
TM		 2164 struct nfs4_state *state;
2165 unsigned int seq;
2166 int ret;
2167
2168 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2169
2170 ret = _nfs4_proc_open(opendata);
2171 if (ret != 0)
2172 goto out;
2173
2174 state = nfs4_opendata_to_nfs4_state(opendata);
2175 ret = PTR_ERR(state);
2176 if (IS_ERR(state))
2177 goto out;
2178 if (server->caps & NFS_CAP_POSIX_LOCK)
2179 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2180
275bb307
TM		 2181 dentry = opendata->dentry;
2182 if (dentry->d_inode == NULL) {
2183 /* FIXME: Is this d_drop() ever needed? */
2184 d_drop(dentry);
2185 dentry = d_add_unique(dentry, igrab(state->inode));
2186 if (dentry == NULL) {
2187 dentry = opendata->dentry;
2188 } else if (dentry != ctx->dentry) {
2189 dput(ctx->dentry);
2190 ctx->dentry = dget(dentry);
2191 }
2192 nfs_set_verifier(dentry,
2193 nfs_save_change_attribute(opendata->dir->d_inode));
2194 }
2195
c21443c2
TM		 2196 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2197 if (ret != 0)
2198 goto out;
2199
3efb9722 2200 ctx->state = state;
c45ffdd2
TM		 2201 if (dentry->d_inode == state->inode) {
2202 nfs_inode_attach_open_context(ctx);
2203 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2204 nfs4_schedule_stateid_recovery(server, state);
2205 }
c21443c2
TM		 2206out:
2207 return ret;
2208}
2209
1da177e4 2210/*
24ac23ab 2211 * Returns a referenced nfs4_state
1da177e4 2212 */
82be417a 2213static int _nfs4_do_open(struct inode *dir,
4197a055 2214 struct nfs_open_context *ctx,
82be417a
AA		 2215 int flags,
2216 struct iattr *sattr,
5bc2afc2
TM		 2217 struct nfs4_label *label,
2218 int *opened)
1da177e4
LT		 2219{
2220 struct nfs4_state_owner *sp;
2221 struct nfs4_state *state = NULL;
2222 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2223 struct nfs4_opendata *opendata;
4197a055
TM		 2224 struct dentry *dentry = ctx->dentry;
2225 struct rpc_cred *cred = ctx->cred;
2226 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2227 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2228 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2229 struct nfs4_label *olabel = NULL;
aac00a8d 2230 int status;
1da177e4
LT		 2231
2232 /* Protect against reboot recovery conflicts */
1da177e4 2233 status = -ENOMEM;
d1e284d5
TM		 2234 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2235 if (sp == NULL) {
1da177e4
LT		 2236 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2237 goto out_err;
2238 }
58d9714a
TM		 2239 status = nfs4_recover_expired_lease(server);
2240 if (status != 0)
b4454fe1 2241 goto err_put_state_owner;
82a2c1b7
AV		 2242 if (dentry->d_inode != NULL)
2243 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2244 status = -ENOMEM;
49f9a0fa
TM		 2245 if (dentry->d_inode)
2246 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2247 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2248 label, claim, GFP_KERNEL);
e56e0b78 2249 if (opendata == NULL)
95d35cb4 2250 goto err_put_state_owner;
1da177e4 2251
14c43f76
DQ		 2252 if (label) {
2253 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2254 if (IS_ERR(olabel)) {
2255 status = PTR_ERR(olabel);
2256 goto err_opendata_put;
2257 }
2258 }
2259
82be417a
AA		 2260 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2261 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2262 if (!opendata->f_attr.mdsthreshold)
14c43f76 2263 goto err_free_label;
1549210f 2264 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2265 }
82a2c1b7
AV		 2266 if (dentry->d_inode != NULL)
2267 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2268
3efb9722 2269 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2270 if (status != 0)
14c43f76 2271 goto err_free_label;
3efb9722 2272 state = ctx->state;
6168f62c 2273
549b19cc
TM		 2274 if ((opendata->o_arg.open_flags & O_EXCL) &&
2275 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2276 nfs4_exclusive_attrset(opendata, sattr);
2277
2278 nfs_fattr_init(opendata->o_res.f_attr);
2279 status = nfs4_do_setattr(state->inode, cred,
2280 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2281 state, label, olabel);
2282 if (status == 0) {
0ab64e0e 2283 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2284 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2285 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2286 }
0ab64e0e 2287 }
5bc2afc2
TM		 2288 if (opendata->file_created)
2289 *opened |= FILE_CREATED;
82be417a
AA		 2290
2291 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2292 *ctx_th = opendata->f_attr.mdsthreshold;
2293 else
2294 kfree(opendata->f_attr.mdsthreshold);
2295 opendata->f_attr.mdsthreshold = NULL;
2296
14c43f76
DQ		 2297 nfs4_label_free(olabel);
2298
c6d00e63 2299 nfs4_opendata_put(opendata);
1da177e4 2300 nfs4_put_state_owner(sp);
1da177e4 2301 return 0;
14c43f76
DQ		 2302err_free_label:
2303 nfs4_label_free(olabel);
c6d00e63 2304err_opendata_put:
82be417a 2305 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2306 nfs4_opendata_put(opendata);
e56e0b78
TM		 2307err_put_state_owner:
2308 nfs4_put_state_owner(sp);
1da177e4 2309out_err:
1da177e4
LT		 2310 return status;
2311}
2312
2313
82be417a 2314static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2315 struct nfs_open_context *ctx,
82be417a
AA		 2316 int flags,
2317 struct iattr *sattr,
5bc2afc2
TM		 2318 struct nfs4_label *label,
2319 int *opened)
1da177e4 2320{
49f9a0fa 2321 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2322 struct nfs4_exception exception = { };
2323 struct nfs4_state *res;
2324 int status;
2325
2326 do {
5bc2afc2 2327 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2328 res = ctx->state;
42113a75 2329 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2330 if (status == 0)
2331 break;
2332 /* NOTE: BAD_SEQID means the server and client disagree about the
2333 * book-keeping w.r.t. state-changing operations
2334 * (OPEN/CLOSE/LOCK/LOCKU...)
2335 * It is actually a sign of a bug on the client or on the server.
2336 *
2337 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2338 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2339 * have unhashed the old state_owner for us, and that we can
2340 * therefore safely retry using a new one. We should still warn
2341 * the user though...
2342 */
2343 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2344 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2345 " returned a bad sequence-id error!\n",
2346 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2347 exception.retry = 1;
2348 continue;
2349 }
550f5747
TM		 2350 /*
2351 * BAD_STATEID on OPEN means that the server cancelled our
2352 * state before it received the OPEN_CONFIRM.
2353 * Recover by retrying the request as per the discussion
2354 * on Page 181 of RFC3530.
2355 */
2356 if (status == -NFS4ERR_BAD_STATEID) {
2357 exception.retry = 1;
2358 continue;
2359 }
aac00a8d
TM		 2360 if (status == -EAGAIN) {
2361 /* We must have found a delegation */
2362 exception.retry = 1;
2363 continue;
2364 }
49f9a0fa
TM		 2365 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2366 continue;
2367 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2368 status, &exception));
2369 } while (exception.retry);
2370 return res;
2371}
2372
659bfcd6
TM		 2373static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2374 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2375 struct nfs4_state *state, struct nfs4_label *ilabel,
2376 struct nfs4_label *olabel)
1da177e4 2377{
3e4f6290 2378 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2379 struct nfs_setattrargs arg = {
3e4f6290 2380 .fh = NFS_FH(inode),
1da177e4
LT		 2381 .iap = sattr,
2382 .server = server,
2383 .bitmask = server->attr_bitmask,
1775fd3e 2384 .label = ilabel,
1da177e4
LT		 2385 };
2386 struct nfs_setattrres res = {
2387 .fattr = fattr,
1775fd3e 2388 .label = olabel,
1da177e4
LT		 2389 .server = server,
2390 };
2391 struct rpc_message msg = {
659bfcd6
TM		 2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2393 .rpc_argp = &arg,
2394 .rpc_resp = &res,
2395 .rpc_cred = cred,
1da177e4 2396 };
26e976a8 2397 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2398 fmode_t fmode;
2399 bool truncate;
65e4308d 2400 int status;
1da177e4 2401
aa9c2669
DQ		 2402 arg.bitmask = nfs4_bitmask(server, ilabel);
2403 if (ilabel)
2404 arg.bitmask = nfs4_bitmask(server, olabel);
2405
0e574af1 2406 nfs_fattr_init(fattr);
1da177e4 2407
ee3ae84e
TM		 2408 /* Servers should only apply open mode checks for file size changes */
2409 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2410 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2411
2412 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2413 /* Use that stateid */
2414 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2415 struct nfs_lockowner lockowner = {
2416 .l_owner = current->files,
2417 .l_pid = current->tgid,
2418 };
4fc8796d 2419 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2420 &lockowner);
08e9eac4 2421 } else
f597c537 2422 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2423
7c513058 2424 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2425 if (status == 0 && state != NULL)
2426 renew_lease(server, timestamp);
65e4308d 2427 return status;
1da177e4
LT		 2428}
2429
659bfcd6
TM		 2430static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2431 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2432 struct nfs4_state *state, struct nfs4_label *ilabel,
2433 struct nfs4_label *olabel)
1da177e4 2434{
3e4f6290 2435 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2436 struct nfs4_exception exception = {
2437 .state = state,
3114ea7a 2438 .inode = inode,
a1d0b5ee 2439 };
1da177e4
LT		 2440 int err;
2441 do {
1775fd3e 2442 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2443 trace_nfs4_setattr(inode, err);
451146be
TM		 2444 switch (err) {
2445 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2446 if (!(sattr->ia_valid & ATTR_SIZE)) {
2447 pr_warn_once("NFSv4: server %s is incorrectly "
2448 "applying open mode checks to "
2449 "a SETATTR that is not "
2450 "changing file size.\n",
2451 server->nfs_client->cl_hostname);
2452 }
451146be
TM		 2453 if (state && !(state->state & FMODE_WRITE)) {
2454 err = -EBADF;
2455 if (sattr->ia_valid & ATTR_OPEN)
2456 err = -EACCES;
2457 goto out;
2458 }
2459 }
2460 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2461 } while (exception.retry);
451146be 2462out:
1da177e4
LT		 2463 return err;
2464}
2465
2466struct nfs4_closedata {
2467 struct inode *inode;
2468 struct nfs4_state *state;
2469 struct nfs_closeargs arg;
2470 struct nfs_closeres res;
516a6af6 2471 struct nfs_fattr fattr;
26e976a8 2472 unsigned long timestamp;
f7e8917a
FI		 2473 bool roc;
2474 u32 roc_barrier;
1da177e4
LT		 2475};
2476
963d8fe5 2477static void nfs4_free_closedata(void *data)
9512135d 2478{
963d8fe5
TM		 2479 struct nfs4_closedata *calldata = data;
2480 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2481 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2482
f7e8917a
FI		 2483 if (calldata->roc)
2484 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2485 nfs4_put_open_state(calldata->state);
2486 nfs_free_seqid(calldata->arg.seqid);
9512135d 2487 nfs4_put_state_owner(sp);
322b2b90 2488 nfs_sb_deactive(sb);
9512135d
TM		 2489 kfree(calldata);
2490}
2491
88069f77
TM		 2492static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2493 fmode_t fmode)
2494{
2495 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2496 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2497 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2498 case FMODE_WRITE:
88069f77 2499 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2500 break;
2501 case FMODE_READ:
88069f77 2502 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2503 break;
2504 case 0:
2505 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2506 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2507 clear_bit(NFS_OPEN_STATE, &state->flags);
2508 }
88069f77
TM		 2509 spin_unlock(&state->owner->so_lock);
2510}
2511
963d8fe5 2512static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2513{
963d8fe5 2514 struct nfs4_closedata *calldata = data;
1da177e4 2515 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2516 struct nfs_server *server = NFS_SERVER(calldata->inode);
2517
a3ca5651 2518 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2519 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2520 return;
42113a75 2521 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2522 /* hmm. we are done with the inode, and in the process of freeing
2523 * the state_owner. we keep this around to process errors
2524 */
1da177e4
LT		 2525 switch (task->tk_status) {
2526 case 0:
f7e8917a
FI		 2527 if (calldata->roc)
2528 pnfs_roc_set_barrier(state->inode,
2529 calldata->roc_barrier);
45328c35 2530 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2531 renew_lease(server, calldata->timestamp);
1da177e4 2532 break;
69794ad7 2533 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2534 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2535 case -NFS4ERR_OLD_STATEID:
2536 case -NFS4ERR_BAD_STATEID:
1da177e4 2537 case -NFS4ERR_EXPIRED:
dc0b027d 2538 if (calldata->arg.fmode == 0)
9e33bed5 2539 break;
1da177e4 2540 default:
69794ad7 2541 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2542 rpc_restart_call_prepare(task);
69794ad7
TM		 2543 goto out_release;
2544 }
1da177e4 2545 }
69794ad7
TM		 2546 nfs4_close_clear_stateid_flags(state, calldata->arg.fmode);
2547out_release:
72211dbe 2548 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2549 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2550 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2551}
2552
4ce70ada 2553static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2554{
4ce70ada 2555 struct nfs4_closedata *calldata = data;
9512135d 2556 struct nfs4_state *state = calldata->state;
7fdab069 2557 struct inode *inode = calldata->inode;
88069f77 2558 int call_close = 0;
9512135d 2559
a3ca5651 2560 dprintk("%s: begin!\n", __func__);
963d8fe5 2561 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2562 goto out_wait;
003707c7 2563
88069f77
TM		 2564 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2565 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2566 spin_lock(&state->owner->so_lock);
003707c7 2567 /* Calculate the change in open mode */
e7616923 2568 if (state->n_rdwr == 0) {
003707c7 2569 if (state->n_rdonly == 0) {
88069f77
TM		 2570 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2571 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2572 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2573 }
2574 if (state->n_wronly == 0) {
88069f77
TM		 2575 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2576 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2577 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2578 }
e7616923 2579 }
5d422301
TM		 2580 if (!nfs4_valid_open_stateid(state))
2581 call_close = 0;
4cecb76f 2582 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2583
2584 if (!call_close) {
963d8fe5 2585 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2586 goto out_no_action;
9512135d 2587 }
88069f77 2588
f7e8917a 2589 if (calldata->arg.fmode == 0) {
88069f77 2590 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2591 if (calldata->roc &&
b9536ad5
AA		 2592 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2593 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2594 goto out_wait;
b9536ad5 2595 }
f7e8917a 2596 }
88069f77 2597
516a6af6 2598 nfs_fattr_init(calldata->res.fattr);
26e976a8 2599 calldata->timestamp = jiffies;
7fdab069 2600 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2601 &calldata->arg.seq_args,
2602 &calldata->res.seq_res,
2240a9e2
TM		 2603 task) != 0)
2604 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2605 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2606 return;
2607out_no_action:
2608 task->tk_action = NULL;
2609out_wait:
2610 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2611}
2612
963d8fe5 2613static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2614 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2615 .rpc_call_done = nfs4_close_done,
2616 .rpc_release = nfs4_free_closedata,
2617};
2618
1da177e4
LT		 2619/*
2620 * It is possible for data to be read/written from a mem-mapped file
2621 * after the sys_close call (which hits the vfs layer as a flush).
2622 * This means that we can't safely call nfsv4 close on a file until
2623 * the inode is cleared. This in turn means that we are not good
2624 * NFSv4 citizens - we do not indicate to the server to update the file's
2625 * share state even when we are done with one of the three share
2626 * stateid's in the inode.
2627 *
2628 * NOTE: Caller must be holding the sp->so_owner semaphore!
2629 */
1f7977c1 2630int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2631{
4a35bd41 2632 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2633 struct nfs4_closedata *calldata;
b39e625b
TM		 2634 struct nfs4_state_owner *sp = state->owner;
2635 struct rpc_task *task;
5138fde0
TM		 2636 struct rpc_message msg = {
2637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2638 .rpc_cred = state->owner->so_cred,
2639 };
c970aa85
TM		 2640 struct rpc_task_setup task_setup_data = {
2641 .rpc_client = server->client,
5138fde0 2642 .rpc_message = &msg,
c970aa85 2643 .callback_ops = &nfs4_close_ops,
101070ca 2644 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2645 .flags = RPC_TASK_ASYNC,
2646 };
9512135d 2647 int status = -ENOMEM;
1da177e4 2648
fa940720
WAA		 2649 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2650 &task_setup_data.rpc_client, &msg);
2651
8535b2be 2652 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2653 if (calldata == NULL)
9512135d 2654 goto out;
a9c92d6b 2655 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2656 calldata->inode = state->inode;
1da177e4 2657 calldata->state = state;
4a35bd41 2658 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2659 calldata->arg.stateid = &state->open_stateid;
1da177e4 2660 /* Serialization for the sequence id */
8535b2be 2661 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2662 if (calldata->arg.seqid == NULL)
2663 goto out_free_calldata;
dc0b027d 2664 calldata->arg.fmode = 0;
a65318bf 2665 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2666 calldata->res.fattr = &calldata->fattr;
c1d51931 2667 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2668 calldata->res.server = server;
1f7977c1 2669 calldata->roc = pnfs_roc(state->inode);
643168c2 2670 nfs_sb_active(calldata->inode->i_sb);
9512135d 2671
1174dd1f
TM		 2672 msg.rpc_argp = &calldata->arg;
2673 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2674 task_setup_data.callback_data = calldata;
2675 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2676 if (IS_ERR(task))
2677 return PTR_ERR(task);
a49c3c77
TM		 2678 status = 0;
2679 if (wait)
2680 status = rpc_wait_for_completion_task(task);
b39e625b 2681 rpc_put_task(task);
a49c3c77 2682 return status;
9512135d
TM		 2683out_free_calldata:
2684 kfree(calldata);
2685out:
b39e625b
TM		 2686 nfs4_put_open_state(state);
2687 nfs4_put_state_owner(sp);
9512135d 2688 return status;
1da177e4
LT		 2689}
2690
2b484297 2691static struct inode *
5bc2afc2
TM		 2692nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2693 int open_flags, struct iattr *attr, int *opened)
1da177e4 2694{
1da177e4 2695 struct nfs4_state *state;
aa9c2669
DQ		 2696 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2697
2698 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2699
565277f6 2700 /* Protect against concurrent sillydeletes */
5bc2afc2 2701 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2702
2703 nfs4_label_release_security(label);
2704
f46e0bd3
TM		 2705 if (IS_ERR(state))
2706 return ERR_CAST(state);
275bb307 2707 return state->inode;
1da177e4
LT		 2708}
2709
1185a552 2710static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2711{
2712 if (ctx->state == NULL)
2713 return;
2714 if (is_sync)
643168c2 2715 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2716 else
643168c2 2717 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2718}
1da177e4 2719
b944dba3
TM		 2720#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2721#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2722#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
2723
1da177e4
LT		 2724static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2725{
43652ad5
BH		 2726 struct nfs4_server_caps_arg args = {
2727 .fhandle = fhandle,
2728 };
1da177e4
LT		 2729 struct nfs4_server_caps_res res = {};
2730 struct rpc_message msg = {
2731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2732 .rpc_argp = &args,
1da177e4
LT		 2733 .rpc_resp = &res,
2734 };
2735 int status;
2736
7c513058 2737 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2738 if (status == 0) {
b944dba3
TM		 2739 /* Sanity check the server answers */
2740 switch (server->nfs_client->cl_minorversion) {
2741 case 0:
2742 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2743 res.attr_bitmask[2] = 0;
2744 break;
2745 case 1:
2746 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2747 break;
2748 case 2:
2749 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2750 }
1da177e4 2751 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2752 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2753 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2754 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2755 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2756 NFS_CAP_CTIME|NFS_CAP_MTIME|
2757 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2758 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2759 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2760 server->caps |= NFS_CAP_ACLS;
2761 if (res.has_links != 0)
2762 server->caps |= NFS_CAP_HARDLINKS;
2763 if (res.has_symlinks != 0)
2764 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2765 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2766 server->caps |= NFS_CAP_FILEID;
2767 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2768 server->caps |= NFS_CAP_MODE;
2769 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2770 server->caps |= NFS_CAP_NLINK;
2771 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2772 server->caps |= NFS_CAP_OWNER;
2773 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2774 server->caps |= NFS_CAP_OWNER_GROUP;
2775 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2776 server->caps |= NFS_CAP_ATIME;
2777 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2778 server->caps |= NFS_CAP_CTIME;
2779 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2780 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2781#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2782 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2783 server->caps |= NFS_CAP_SECURITY_LABEL;
2784#endif
2785 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2786 sizeof(server->attr_bitmask));
b944dba3 2787 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2788
a65318bf
TM		 2789 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2790 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2791 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2792 server->cache_consistency_bitmask[2] = 0;
1da177e4 2793 server->acl_bitmask = res.acl_bitmask;
264e6351 2794 server->fh_expire_type = res.fh_expire_type;
1da177e4 2795 }
cccef3b9 2796
1da177e4
LT		 2797 return status;
2798}
2799
55a97593 2800int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2801{
2802 struct nfs4_exception exception = { };
2803 int err;
2804 do {
2805 err = nfs4_handle_exception(server,
2806 _nfs4_server_capabilities(server, fhandle),
2807 &exception);
2808 } while (exception.retry);
2809 return err;
2810}
2811
2812static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2813 struct nfs_fsinfo *info)
2814{
aa9c2669 2815 u32 bitmask[3];
1da177e4 2816 struct nfs4_lookup_root_arg args = {
aa9c2669 2817 .bitmask = bitmask,
1da177e4
LT		 2818 };
2819 struct nfs4_lookup_res res = {
2820 .server = server,
0e574af1 2821 .fattr = info->fattr,
1da177e4
LT		 2822 .fh = fhandle,
2823 };
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2826 .rpc_argp = &args,
2827 .rpc_resp = &res,
2828 };
008f55d0 2829
aa9c2669
DQ		 2830 bitmask[0] = nfs4_fattr_bitmap[0];
2831 bitmask[1] = nfs4_fattr_bitmap[1];
2832 /*
2833 * Process the label in the upcoming getfattr
2834 */
2835 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2836
0e574af1 2837 nfs_fattr_init(info->fattr);
7c513058 2838 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2839}
2840
2841static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2842 struct nfs_fsinfo *info)
2843{
2844 struct nfs4_exception exception = { };
2845 int err;
2846 do {
fb8a5ba8 2847 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2848 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2849 switch (err) {
2850 case 0:
2851 case -NFS4ERR_WRONGSEC:
05e9cfb4 2852 goto out;
fb8a5ba8
BS		 2853 default:
2854 err = nfs4_handle_exception(server, err, &exception);
2855 }
1da177e4 2856 } while (exception.retry);
05e9cfb4 2857out:
1da177e4
LT		 2858 return err;
2859}
2860
8f70e95f
BS		 2861static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2862 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2863{
c2190661
TM		 2864 struct rpc_auth_create_args auth_args = {
2865 .pseudoflavor = flavor,
2866 };
8f70e95f
BS		 2867 struct rpc_auth *auth;
2868 int ret;
2869
c2190661 2870 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2871 if (IS_ERR(auth)) {
75bc8821 2872 ret = -EACCES;
8f70e95f
BS		 2873 goto out;
2874 }
2875 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2876out:
2877 return ret;
2878}
2879
9a744ba3
CL		 2880/*
2881 * Retry pseudoroot lookup with various security flavors. We do this when:
2882 *
2883 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2884 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2885 *
2886 * Returns zero on success, or a negative NFS4ERR value, or a
2887 * negative errno value.
2888 */
801a16dc 2889static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2890 struct nfs_fsinfo *info)
1da177e4 2891{
9a744ba3
CL		 2892 /* Per 3530bis 15.33.5 */
2893 static const rpc_authflavor_t flav_array[] = {
2894 RPC_AUTH_GSS_KRB5P,
2895 RPC_AUTH_GSS_KRB5I,
2896 RPC_AUTH_GSS_KRB5,
c4eafe11 2897 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2898 RPC_AUTH_NULL,
2899 };
2900 int status = -EPERM;
2901 size_t i;
6a1a1e34 2902
4d4b69dd
WAA		 2903 if (server->auth_info.flavor_len > 0) {
2904 /* try each flavor specified by user */
2905 for (i = 0; i < server->auth_info.flavor_len; i++) {
2906 status = nfs4_lookup_root_sec(server, fhandle, info,
2907 server->auth_info.flavors[i]);
2908 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2909 continue;
2910 break;
2911 }
2912 } else {
2913 /* no flavors specified by user, try default list */
2914 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2915 status = nfs4_lookup_root_sec(server, fhandle, info,
2916 flav_array[i]);
2917 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2918 continue;
2919 break;
2920 }
8f70e95f 2921 }
9a744ba3 2922
fb8a5ba8
BS		 2923 /*
2924 * -EACCESS could mean that the user doesn't have correct permissions
2925 * to access the mount. It could also mean that we tried to mount
2926 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2927 * existing mount programs don't handle -EACCES very well so it should
2928 * be mapped to -EPERM instead.
2929 */
2930 if (status == -EACCES)
2931 status = -EPERM;
801a16dc
BS		 2932 return status;
2933}
2934
2ed4b95b
CL		 2935static int nfs4_do_find_root_sec(struct nfs_server *server,
2936 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2937{
2938 int mv = server->nfs_client->cl_minorversion;
2939 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2940}
2941
2942/**
2943 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2944 * @server: initialized nfs_server handle
2945 * @fhandle: we fill in the pseudo-fs root file handle
2946 * @info: we fill in an FSINFO struct
5e6b1990 2947 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2948 *
2949 * Returns zero on success, or a negative errno.
801a16dc 2950 */
3028eb2b 2951int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2952 struct nfs_fsinfo *info,
2953 bool auth_probe)
801a16dc 2954{
2ed4b95b
CL		 2955 int status;
2956
5e6b1990
TM		 2957 switch (auth_probe) {
2958 case false:
2959 status = nfs4_lookup_root(server, fhandle, info);
2960 if (status != -NFS4ERR_WRONGSEC)
2961 break;
5e6b1990 2962 default:
2ed4b95b 2963 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2964 }
2ed4b95b 2965
1da177e4
LT		 2966 if (status == 0)
2967 status = nfs4_server_capabilities(server, fhandle);
2968 if (status == 0)
2969 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2970
c12e87f4 2971 return nfs4_map_errors(status);
1da177e4
LT		 2972}
2973
bae36241
BS		 2974static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2975 struct nfs_fsinfo *info)
2976{
2977 int error;
2978 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2979 struct nfs4_label *label = NULL;
bae36241
BS		 2980
2981 error = nfs4_server_capabilities(server, mntfh);
2982 if (error < 0) {
2983 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2984 return error;
2985 }
2986
14c43f76
DQ		 2987 label = nfs4_label_alloc(server, GFP_KERNEL);
2988 if (IS_ERR(label))
2989 return PTR_ERR(label);
2990
1775fd3e 2991 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2992 if (error < 0) {
2993 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2994 goto err_free_label;
bae36241
BS		 2995 }
2996
2997 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2998 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2999 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3000
14c43f76
DQ		 3001err_free_label:
3002 nfs4_label_free(label);
3003
bae36241
BS		 3004 return error;
3005}
3006
6b97fd3d
MN		 3007/*
3008 * Get locations and (maybe) other attributes of a referral.
3009 * Note that we'll actually follow the referral later when
3010 * we detect fsid mismatch in inode revalidation
3011 */
f05d147f
BS		 3012static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3013 const struct qstr *name, struct nfs_fattr *fattr,
3014 struct nfs_fh *fhandle)
6b97fd3d
MN		 3015{
3016 int status = -ENOMEM;
3017 struct page *page = NULL;
3018 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3019
3020 page = alloc_page(GFP_KERNEL);
3021 if (page == NULL)
3022 goto out;
3023 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3024 if (locations == NULL)
3025 goto out;
3026
f05d147f 3027 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3028 if (status != 0)
3029 goto out;
519ae255
CL		 3030
3031 /*
3032 * If the fsid didn't change, this is a migration event, not a
3033 * referral. Cause us to drop into the exception handler, which
3034 * will kick off migration recovery.
3035 */
6b97fd3d 3036 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3037 dprintk("%s: server did not return a different fsid for"
3038 " a referral at %s\n", __func__, name->name);
519ae255 3039 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3040 goto out;
3041 }
533eb461
AA		 3042 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3043 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3044
533eb461 3045 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3046 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3047 memset(fhandle, 0, sizeof(struct nfs_fh));
3048out:
3049 if (page)
3050 __free_page(page);
5d7ca35a 3051 kfree(locations);
6b97fd3d
MN		 3052 return status;
3053}
3054
1775fd3e
DQ		 3055static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3056 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3057{
3058 struct nfs4_getattr_arg args = {
3059 .fh = fhandle,
3060 .bitmask = server->attr_bitmask,
3061 };
3062 struct nfs4_getattr_res res = {
3063 .fattr = fattr,
1775fd3e 3064 .label = label,
1da177e4
LT		 3065 .server = server,
3066 };
3067 struct rpc_message msg = {
3068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3069 .rpc_argp = &args,
3070 .rpc_resp = &res,
3071 };
aa9c2669
DQ		 3072
3073 args.bitmask = nfs4_bitmask(server, label);
3074
0e574af1 3075 nfs_fattr_init(fattr);
7c513058 3076 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3077}
3078
1775fd3e
DQ		 3079static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3080 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3081{
3082 struct nfs4_exception exception = { };
3083 int err;
3084 do {
b5f875a9
TM		 3085 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3086 trace_nfs4_getattr(server, fhandle, fattr, err);
3087 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3088 &exception);
3089 } while (exception.retry);
3090 return err;
3091}
3092
3093/*
3094 * The file is not closed if it is opened due to the a request to change
3095 * the size of the file. The open call will not be needed once the
3096 * VFS layer lookup-intents are implemented.
3097 *
3098 * Close is called when the inode is destroyed.
3099 * If we haven't opened the file for O_WRONLY, we
3100 * need to in the size_change case to obtain a stateid.
3101 *
3102 * Got race?
3103 * Because OPEN is always done by name in nfsv4, it is
3104 * possible that we opened a different file by the same
3105 * name. We can recognize this race condition, but we
3106 * can't do anything about it besides returning an error.
3107 *
3108 * This will be fixed with VFS changes (lookup-intent).
3109 */
3110static int
3111nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3112 struct iattr *sattr)
3113{
08e9eac4 3114 struct inode *inode = dentry->d_inode;
659bfcd6 3115 struct rpc_cred *cred = NULL;
d530838b 3116 struct nfs4_state *state = NULL;
14c43f76 3117 struct nfs4_label *label = NULL;
1da177e4
LT		 3118 int status;
3119
8a1636c4 3120 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3121 pnfs_commit_and_return_layout(inode);
8a1636c4 3122
0e574af1 3123 nfs_fattr_init(fattr);
1da177e4 3124
2669940d
AA		 3125 /* Deal with open(O_TRUNC) */
3126 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3127 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3128
3129 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3130 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3131 return 0;
3132
d530838b 3133 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3134 if (sattr->ia_valid & ATTR_FILE) {
3135 struct nfs_open_context *ctx;
3136
3137 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3138 if (ctx) {
3139 cred = ctx->cred;
3140 state = ctx->state;
3141 }
659bfcd6 3142 }
08e9eac4 3143
14c43f76
DQ		 3144 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3145 if (IS_ERR(label))
3146 return PTR_ERR(label);
3147
3148 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3149 if (status == 0) {
65e4308d 3150 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3151 nfs_setsecurity(inode, fattr, label);
3152 }
14c43f76 3153 nfs4_label_free(label);
1da177e4
LT		 3154 return status;
3155}
3156
0c2e53f1
TM		 3157static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3158 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3159 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3160{
0c2e53f1 3161 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3162 int status;
3163 struct nfs4_lookup_arg args = {
3164 .bitmask = server->attr_bitmask,
0c2e53f1 3165 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3166 .name = name,
3167 };
3168 struct nfs4_lookup_res res = {
3169 .server = server,
3170 .fattr = fattr,
aa9c2669 3171 .label = label,
2b3de441
DH		 3172 .fh = fhandle,
3173 };
3174 struct rpc_message msg = {
3175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3176 .rpc_argp = &args,
3177 .rpc_resp = &res,
3178 };
3179
aa9c2669
DQ		 3180 args.bitmask = nfs4_bitmask(server, label);
3181
2b3de441
DH		 3182 nfs_fattr_init(fattr);
3183
1da177e4 3184 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3185 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3186 dprintk("NFS reply lookup: %d\n", status);
3187 return status;
3188}
3189
72de53ec 3190static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3191{
7ebb9315 3192 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3193 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3194 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3195 fattr->nlink = 2;
3196}
3197
72de53ec
BS		 3198static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3199 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3200 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3201{
3202 struct nfs4_exception exception = { };
72de53ec 3203 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3204 int err;
3205 do {
1775fd3e 3206 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3207 trace_nfs4_lookup(dir, name, err);
72de53ec 3208 switch (err) {
08ef7bd3 3209 case -NFS4ERR_BADNAME:
72de53ec
BS		 3210 err = -ENOENT;
3211 goto out;
0c2e53f1 3212 case -NFS4ERR_MOVED:
f05d147f 3213 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3214 goto out;
0c2e53f1 3215 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3216 err = -EPERM;
3217 if (client != *clnt)
3218 goto out;
72de53ec
BS		 3219 client = nfs4_create_sec_client(client, dir, name);
3220 if (IS_ERR(client))
3221 return PTR_ERR(client);
3222
3223 exception.retry = 1;
3224 break;
3225 default:
3226 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3227 }
1da177e4 3228 } while (exception.retry);
72de53ec
BS		 3229
3230out:
3231 if (err == 0)
3232 *clnt = client;
3233 else if (client != *clnt)
3234 rpc_shutdown_client(client);
3235
1da177e4
LT		 3236 return err;
3237}
3238
80a16b21 3239static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3240 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3241 struct nfs4_label *label)
72de53ec
BS		 3242{
3243 int status;
3244 struct rpc_clnt *client = NFS_CLIENT(dir);
3245
1775fd3e 3246 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3247 if (client != NFS_CLIENT(dir)) {
3248 rpc_shutdown_client(client);
3249 nfs_fixup_secinfo_attributes(fattr);
3250 }
3251 return status;
3252}
3253
f05d147f
BS		 3254struct rpc_clnt *
3255nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3256 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3257{
b72888cb 3258 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3259 int status;
f05d147f 3260
1775fd3e 3261 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3262 if (status < 0)
f05d147f 3263 return ERR_PTR(status);
b72888cb 3264 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3265}
3266
1da177e4
LT		 3267static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3268{
76b32999 3269 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3270 struct nfs4_accessargs args = {
3271 .fh = NFS_FH(inode),
a4980e78 3272 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3273 };
3274 struct nfs4_accessres res = {
3275 .server = server,
1da177e4 3276 };
1da177e4
LT		 3277 struct rpc_message msg = {
3278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3279 .rpc_argp = &args,
3280 .rpc_resp = &res,
3281 .rpc_cred = entry->cred,
3282 };
3283 int mode = entry->mask;
aa9c2669 3284 int status = 0;
1da177e4
LT		 3285
3286 /*
3287 * Determine which access bits we want to ask for...
3288 */
3289 if (mode & MAY_READ)
3290 args.access |= NFS4_ACCESS_READ;
3291 if (S_ISDIR(inode->i_mode)) {
3292 if (mode & MAY_WRITE)
3293 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3294 if (mode & MAY_EXEC)
3295 args.access |= NFS4_ACCESS_LOOKUP;
3296 } else {
3297 if (mode & MAY_WRITE)
3298 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3299 if (mode & MAY_EXEC)
3300 args.access |= NFS4_ACCESS_EXECUTE;
3301 }
c407d41a
TM		 3302
3303 res.fattr = nfs_alloc_fattr();
3304 if (res.fattr == NULL)
3305 return -ENOMEM;
3306
7c513058 3307 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3308 if (!status) {
6168f62c 3309 nfs_access_set_mask(entry, res.access);
c407d41a 3310 nfs_refresh_inode(inode, res.fattr);
1da177e4 3311 }
c407d41a 3312 nfs_free_fattr(res.fattr);
1da177e4
LT		 3313 return status;
3314}
3315
3316static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3317{
3318 struct nfs4_exception exception = { };
3319 int err;
3320 do {
c1578b76
TM		 3321 err = _nfs4_proc_access(inode, entry);
3322 trace_nfs4_access(inode, err);
3323 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327}
3328
3329/*
3330 * TODO: For the time being, we don't try to get any attributes
3331 * along with any of the zero-copy operations READ, READDIR,
3332 * READLINK, WRITE.
3333 *
3334 * In the case of the first three, we want to put the GETATTR
3335 * after the read-type operation -- this is because it is hard
3336 * to predict the length of a GETATTR response in v4, and thus
3337 * align the READ data correctly. This means that the GETATTR
3338 * may end up partially falling into the page cache, and we should
3339 * shift it into the 'tail' of the xdr_buf before processing.
3340 * To do this efficiently, we need to know the total length
3341 * of data received, which doesn't seem to be available outside
3342 * of the RPC layer.
3343 *
3344 * In the case of WRITE, we also want to put the GETATTR after
3345 * the operation -- in this case because we want to make sure
140150db 3346 * we get the post-operation mtime and size.
1da177e4
LT		 3347 *
3348 * Both of these changes to the XDR layer would in fact be quite
3349 * minor, but I decided to leave them for a subsequent patch.
3350 */
3351static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3352 unsigned int pgbase, unsigned int pglen)
3353{
3354 struct nfs4_readlink args = {
3355 .fh = NFS_FH(inode),
3356 .pgbase = pgbase,
3357 .pglen = pglen,
3358 .pages = &page,
3359 };
f50c7000 3360 struct nfs4_readlink_res res;
1da177e4
LT		 3361 struct rpc_message msg = {
3362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3363 .rpc_argp = &args,
f50c7000 3364 .rpc_resp = &res,
1da177e4
LT		 3365 };
3366
7c513058 3367 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3368}
3369
3370static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3371 unsigned int pgbase, unsigned int pglen)
3372{
3373 struct nfs4_exception exception = { };
3374 int err;
3375 do {
c1578b76
TM		 3376 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3377 trace_nfs4_readlink(inode, err);
3378 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3379 &exception);
3380 } while (exception.retry);
3381 return err;
3382}
3383
1da177e4 3384/*
8867fe58 3385 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3386 */
1da177e4
LT		 3387static int
3388nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3389 int flags)
1da177e4 3390{
aa9c2669 3391 struct nfs4_label l, *ilabel = NULL;
8867fe58 3392 struct nfs_open_context *ctx;
1da177e4 3393 struct nfs4_state *state;
5bc2afc2 3394 int opened = 0;
1da177e4
LT		 3395 int status = 0;
3396
8867fe58
MS		 3397 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3398 if (IS_ERR(ctx))
3399 return PTR_ERR(ctx);
3400
aa9c2669
DQ		 3401 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3402
a8a5da99 3403 sattr->ia_mode &= ~current_umask();
5bc2afc2 3404 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3405 if (IS_ERR(state)) {
3406 status = PTR_ERR(state);
c0204fd2 3407 goto out;
1da177e4 3408 }
1da177e4 3409out:
aa9c2669 3410 nfs4_label_release_security(ilabel);
8867fe58 3411 put_nfs_open_context(ctx);
1da177e4
LT		 3412 return status;
3413}
3414
3415static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3416{
16e42959 3417 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3418 struct nfs_removeargs args = {
1da177e4 3419 .fh = NFS_FH(dir),
26fe5750 3420 .name = *name,
16e42959 3421 };
4fdc17b2 3422 struct nfs_removeres res = {
16e42959 3423 .server = server,
1da177e4 3424 };
1da177e4 3425 struct rpc_message msg = {
4fdc17b2
TM		 3426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3427 .rpc_argp = &args,
3428 .rpc_resp = &res,
1da177e4 3429 };
778d2817 3430 int status;
1da177e4 3431
7c513058 3432 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3433 if (status == 0)
16e42959 3434 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3435 return status;
3436}
3437
3438static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3439{
3440 struct nfs4_exception exception = { };
3441 int err;
3442 do {
078ea3df
TM		 3443 err = _nfs4_proc_remove(dir, name);
3444 trace_nfs4_remove(dir, name, err);
3445 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3446 &exception);
3447 } while (exception.retry);
3448 return err;
3449}
3450
e4eff1a6 3451static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3452{
e4eff1a6
TM		 3453 struct nfs_server *server = NFS_SERVER(dir);
3454 struct nfs_removeargs *args = msg->rpc_argp;
3455 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3456
e4eff1a6 3457 res->server = server;
1da177e4 3458 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3459 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3460
3461 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3462}
3463
34e137cc
BS		 3464static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3465{
d9afbd1b
TM		 3466 nfs4_setup_sequence(NFS_SERVER(data->dir),
3467 &data->args.seq_args,
3468 &data->res.seq_res,
3469 task);
1da177e4
LT		 3470}
3471
e4eff1a6 3472static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3473{
078ea3df
TM		 3474 struct nfs_unlinkdata *data = task->tk_calldata;
3475 struct nfs_removeres *res = &data->res;
e4eff1a6 3476
14516c3a
TM		 3477 if (!nfs4_sequence_done(task, &res->seq_res))
3478 return 0;
9e33bed5 3479 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3480 return 0;
3481 update_changeattr(dir, &res->cinfo);
e4eff1a6 3482 return 1;
1da177e4
LT		 3483}
3484
d3d4152a
JL		 3485static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3486{
3487 struct nfs_server *server = NFS_SERVER(dir);
3488 struct nfs_renameargs *arg = msg->rpc_argp;
3489 struct nfs_renameres *res = msg->rpc_resp;
3490
3491 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3492 res->server = server;
a9c92d6b 3493 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3494}
3495
c6bfa1a1
BS		 3496static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3497{
d9afbd1b
TM		 3498 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3499 &data->args.seq_args,
3500 &data->res.seq_res,
3501 task);
d3d4152a
JL		 3502}
3503
3504static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3505 struct inode *new_dir)
3506{
fbc6f7c2
TM		 3507 struct nfs_renamedata *data = task->tk_calldata;
3508 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3509
3510 if (!nfs4_sequence_done(task, &res->seq_res))
3511 return 0;
3512 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3513 return 0;
3514
3515 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3516 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3517 return 1;
3518}
3519
1da177e4
LT		 3520static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3521 struct inode *new_dir, struct qstr *new_name)
3522{
6caf2c82 3523 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3524 struct nfs_renameargs arg = {
1da177e4
LT		 3525 .old_dir = NFS_FH(old_dir),
3526 .new_dir = NFS_FH(new_dir),
3527 .old_name = old_name,
3528 .new_name = new_name,
6caf2c82 3529 };
e8582a8b 3530 struct nfs_renameres res = {
6caf2c82 3531 .server = server,
1da177e4 3532 };
1da177e4
LT		 3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3535 .rpc_argp = &arg,
3536 .rpc_resp = &res,
3537 };
011fff72 3538 int status = -ENOMEM;
14c43f76 3539
7c513058 3540 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3541 if (!status) {
3542 update_changeattr(old_dir, &res.old_cinfo);
3543 update_changeattr(new_dir, &res.new_cinfo);
3544 }
3545 return status;
3546}
3547
3548static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3549 struct inode *new_dir, struct qstr *new_name)
3550{
3551 struct nfs4_exception exception = { };
3552 int err;
3553 do {
fbc6f7c2
TM		 3554 err = _nfs4_proc_rename(old_dir, old_name,
3555 new_dir, new_name);
3556 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3557 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3558 &exception);
3559 } while (exception.retry);
3560 return err;
3561}
3562
3563static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3564{
91ba2eee 3565 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3566 struct nfs4_link_arg arg = {
3567 .fh = NFS_FH(inode),
3568 .dir_fh = NFS_FH(dir),
3569 .name = name,
91ba2eee
TM		 3570 .bitmask = server->attr_bitmask,
3571 };
91ba2eee
TM		 3572 struct nfs4_link_res res = {
3573 .server = server,
1775fd3e 3574 .label = NULL,
1da177e4 3575 };
1da177e4
LT		 3576 struct rpc_message msg = {
3577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3578 .rpc_argp = &arg,
91ba2eee 3579 .rpc_resp = &res,
1da177e4 3580 };
136f2627
TM		 3581 int status = -ENOMEM;
3582
3583 res.fattr = nfs_alloc_fattr();
778d2817 3584 if (res.fattr == NULL)
136f2627 3585 goto out;
1da177e4 3586
14c43f76
DQ		 3587 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3588 if (IS_ERR(res.label)) {
3589 status = PTR_ERR(res.label);
3590 goto out;
3591 }
aa9c2669 3592 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3593
7c513058 3594 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3595 if (!status) {
3596 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3597 status = nfs_post_op_update_inode(inode, res.fattr);
3598 if (!status)
3599 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3600 }
14c43f76
DQ		 3601
3602
3603 nfs4_label_free(res.label);
3604
136f2627 3605out:
136f2627 3606 nfs_free_fattr(res.fattr);
1da177e4
LT		 3607 return status;
3608}
3609
3610static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3611{
3612 struct nfs4_exception exception = { };
3613 int err;
3614 do {
3615 err = nfs4_handle_exception(NFS_SERVER(inode),
3616 _nfs4_proc_link(inode, dir, name),
3617 &exception);
3618 } while (exception.retry);
3619 return err;
3620}
3621
57dc9a57
TM		 3622struct nfs4_createdata {
3623 struct rpc_message msg;
3624 struct nfs4_create_arg arg;
3625 struct nfs4_create_res res;
3626 struct nfs_fh fh;
3627 struct nfs_fattr fattr;
1775fd3e 3628 struct nfs4_label *label;
57dc9a57
TM		 3629};
3630
3631static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3632 struct qstr *name, struct iattr *sattr, u32 ftype)
3633{
3634 struct nfs4_createdata *data;
3635
3636 data = kzalloc(sizeof(*data), GFP_KERNEL);
3637 if (data != NULL) {
3638 struct nfs_server *server = NFS_SERVER(dir);
3639
14c43f76
DQ		 3640 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3641 if (IS_ERR(data->label))
3642 goto out_free;
3643
57dc9a57
TM		 3644 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3645 data->msg.rpc_argp = &data->arg;
3646 data->msg.rpc_resp = &data->res;
3647 data->arg.dir_fh = NFS_FH(dir);
3648 data->arg.server = server;
3649 data->arg.name = name;
3650 data->arg.attrs = sattr;
3651 data->arg.ftype = ftype;
aa9c2669 3652 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3653 data->res.server = server;
3654 data->res.fh = &data->fh;
3655 data->res.fattr = &data->fattr;
1775fd3e 3656 data->res.label = data->label;
57dc9a57 3657 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3658 }
3659 return data;
14c43f76
DQ		 3660out_free:
3661 kfree(data);
3662 return NULL;
57dc9a57
TM		 3663}
3664
3665static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3666{
7c513058 3667 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3668 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3669 if (status == 0) {
3670 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3671 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3672 }
3673 return status;
3674}
3675
3676static void nfs4_free_createdata(struct nfs4_createdata *data)
3677{
14c43f76 3678 nfs4_label_free(data->label);
57dc9a57
TM		 3679 kfree(data);
3680}
3681
4f390c15 3682static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3683 struct page *page, unsigned int len, struct iattr *sattr,
3684 struct nfs4_label *label)
1da177e4 3685{
57dc9a57
TM		 3686 struct nfs4_createdata *data;
3687 int status = -ENAMETOOLONG;
1da177e4 3688
94a6d753 3689 if (len > NFS4_MAXPATHLEN)
57dc9a57 3690 goto out;
4f390c15 3691
57dc9a57
TM		 3692 status = -ENOMEM;
3693 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3694 if (data == NULL)
3695 goto out;
3696
3697 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3698 data->arg.u.symlink.pages = &page;
3699 data->arg.u.symlink.len = len;
1775fd3e 3700 data->arg.label = label;
1da177e4 3701
57dc9a57
TM		 3702 status = nfs4_do_create(dir, dentry, data);
3703
3704 nfs4_free_createdata(data);
3705out:
1da177e4
LT		 3706 return status;
3707}
3708
4f390c15 3709static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3710 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3711{
3712 struct nfs4_exception exception = { };
aa9c2669 3713 struct nfs4_label l, *label = NULL;
1da177e4 3714 int err;
aa9c2669
DQ		 3715
3716 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3717
1da177e4 3718 do {
078ea3df
TM		 3719 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3720 trace_nfs4_symlink(dir, &dentry->d_name, err);
3721 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3722 &exception);
3723 } while (exception.retry);
aa9c2669
DQ		 3724
3725 nfs4_label_release_security(label);
1da177e4
LT		 3726 return err;
3727}
3728
3729static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3730 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3731{
57dc9a57
TM		 3732 struct nfs4_createdata *data;
3733 int status = -ENOMEM;
1da177e4 3734
57dc9a57
TM		 3735 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3736 if (data == NULL)
3737 goto out;
3738
1775fd3e 3739 data->arg.label = label;
57dc9a57
TM		 3740 status = nfs4_do_create(dir, dentry, data);
3741
3742 nfs4_free_createdata(data);
3743out:
1da177e4
LT		 3744 return status;
3745}
3746
3747static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3748 struct iattr *sattr)
3749{
3750 struct nfs4_exception exception = { };
aa9c2669 3751 struct nfs4_label l, *label = NULL;
1da177e4 3752 int err;
a8a5da99 3753
aa9c2669
DQ		 3754 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3755
a8a5da99 3756 sattr->ia_mode &= ~current_umask();
1da177e4 3757 do {
078ea3df
TM		 3758 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3759 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3760 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3761 &exception);
3762 } while (exception.retry);
aa9c2669
DQ		 3763 nfs4_label_release_security(label);
3764
1da177e4
LT		 3765 return err;
3766}
3767
3768static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3769 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3770{
3771 struct inode *dir = dentry->d_inode;
3772 struct nfs4_readdir_arg args = {
3773 .fh = NFS_FH(dir),
56e4ebf8 3774 .pages = pages,
1da177e4
LT		 3775 .pgbase = 0,
3776 .count = count,
96d25e53 3777 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3778 .plus = plus,
1da177e4
LT		 3779 };
3780 struct nfs4_readdir_res res;
3781 struct rpc_message msg = {
3782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3783 .rpc_argp = &args,
3784 .rpc_resp = &res,
3785 .rpc_cred = cred,
3786 };
3787 int status;
3788
6de1472f
AV		 3789 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3790 dentry,
eadf4598 3791 (unsigned long long)cookie);
c3f52af3 3792 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3793 res.pgbase = args.pgbase;
7c513058 3794 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3795 if (status >= 0) {
c3f52af3 3796 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3797 status += args.pgbase;
3798 }
c4812998
TM		 3799
3800 nfs_invalidate_atime(dir);
3801
3110ff80 3802 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3803 return status;
3804}
3805
3806static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3807 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3808{
3809 struct nfs4_exception exception = { };
3810 int err;
3811 do {
c1578b76
TM		 3812 err = _nfs4_proc_readdir(dentry, cred, cookie,
3813 pages, count, plus);
3814 trace_nfs4_readdir(dentry->d_inode, err);
3815 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3816 &exception);
3817 } while (exception.retry);
3818 return err;
3819}
3820
3821static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3822 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3823{
57dc9a57
TM		 3824 struct nfs4_createdata *data;
3825 int mode = sattr->ia_mode;
3826 int status = -ENOMEM;
1da177e4 3827
57dc9a57
TM		 3828 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3829 if (data == NULL)
3830 goto out;
3831
1da177e4 3832 if (S_ISFIFO(mode))
57dc9a57 3833 data->arg.ftype = NF4FIFO;
1da177e4 3834 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3835 data->arg.ftype = NF4BLK;
3836 data->arg.u.device.specdata1 = MAJOR(rdev);
3837 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3838 }
3839 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3840 data->arg.ftype = NF4CHR;
3841 data->arg.u.device.specdata1 = MAJOR(rdev);
3842 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3843 } else if (!S_ISSOCK(mode)) {
3844 status = -EINVAL;
3845 goto out_free;
1da177e4 3846 }
1775fd3e 3847
aa9c2669 3848 data->arg.label = label;
57dc9a57 3849 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3850out_free:
57dc9a57
TM		 3851 nfs4_free_createdata(data);
3852out:
1da177e4
LT		 3853 return status;
3854}
3855
3856static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3857 struct iattr *sattr, dev_t rdev)
3858{
3859 struct nfs4_exception exception = { };
aa9c2669 3860 struct nfs4_label l, *label = NULL;
1da177e4 3861 int err;
a8a5da99 3862
aa9c2669
DQ		 3863 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3864
a8a5da99 3865 sattr->ia_mode &= ~current_umask();
1da177e4 3866 do {
078ea3df
TM		 3867 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3868 trace_nfs4_mknod(dir, &dentry->d_name, err);
3869 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3870 &exception);
3871 } while (exception.retry);
aa9c2669
DQ		 3872
3873 nfs4_label_release_security(label);
3874
1da177e4
LT		 3875 return err;
3876}
3877
3878static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3879 struct nfs_fsstat *fsstat)
3880{
3881 struct nfs4_statfs_arg args = {
3882 .fh = fhandle,
3883 .bitmask = server->attr_bitmask,
3884 };
24ad148a
BH		 3885 struct nfs4_statfs_res res = {
3886 .fsstat = fsstat,
3887 };
1da177e4
LT		 3888 struct rpc_message msg = {
3889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3890 .rpc_argp = &args,
24ad148a 3891 .rpc_resp = &res,
1da177e4
LT		 3892 };
3893
0e574af1 3894 nfs_fattr_init(fsstat->fattr);
7c513058 3895 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3896}
3897
3898static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3899{
3900 struct nfs4_exception exception = { };
3901 int err;
3902 do {
3903 err = nfs4_handle_exception(server,
3904 _nfs4_proc_statfs(server, fhandle, fsstat),
3905 &exception);
3906 } while (exception.retry);
3907 return err;
3908}
3909
3910static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3911 struct nfs_fsinfo *fsinfo)
3912{
3913 struct nfs4_fsinfo_arg args = {
3914 .fh = fhandle,
3915 .bitmask = server->attr_bitmask,
3916 };
3dda5e43
BH		 3917 struct nfs4_fsinfo_res res = {
3918 .fsinfo = fsinfo,
3919 };
1da177e4
LT		 3920 struct rpc_message msg = {
3921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3922 .rpc_argp = &args,
3dda5e43 3923 .rpc_resp = &res,
1da177e4
LT		 3924 };
3925
7c513058 3926 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3927}
3928
3929static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3930{
3931 struct nfs4_exception exception = { };
83ca7f5a 3932 unsigned long now = jiffies;
1da177e4
LT		 3933 int err;
3934
3935 do {
83ca7f5a 3936 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3937 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3938 if (err == 0) {
3939 struct nfs_client *clp = server->nfs_client;
3940
3941 spin_lock(&clp->cl_lock);
3942 clp->cl_lease_time = fsinfo->lease_time * HZ;
3943 clp->cl_last_renewal = now;
3944 spin_unlock(&clp->cl_lock);
3945 break;
3946 }
3947 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3948 } while (exception.retry);
3949 return err;
3950}
3951
3952static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3953{
e38eb650
BS		 3954 int error;
3955
0e574af1 3956 nfs_fattr_init(fsinfo->fattr);
e38eb650 3957 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3958 if (error == 0) {
3959 /* block layout checks this! */
3960 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3961 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3962 }
e38eb650
BS		 3963
3964 return error;
1da177e4
LT		 3965}
3966
3967static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3968 struct nfs_pathconf *pathconf)
3969{
3970 struct nfs4_pathconf_arg args = {
3971 .fh = fhandle,
3972 .bitmask = server->attr_bitmask,
3973 };
d45b2989
BH		 3974 struct nfs4_pathconf_res res = {
3975 .pathconf = pathconf,
3976 };
1da177e4
LT		 3977 struct rpc_message msg = {
3978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3979 .rpc_argp = &args,
d45b2989 3980 .rpc_resp = &res,
1da177e4
LT		 3981 };
3982
3983 /* None of the pathconf attributes are mandatory to implement */
3984 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3985 memset(pathconf, 0, sizeof(*pathconf));
3986 return 0;
3987 }
3988
0e574af1 3989 nfs_fattr_init(pathconf->fattr);
7c513058 3990 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3991}
3992
3993static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3994 struct nfs_pathconf *pathconf)
3995{
3996 struct nfs4_exception exception = { };
3997 int err;
3998
3999 do {
4000 err = nfs4_handle_exception(server,
4001 _nfs4_proc_pathconf(server, fhandle, pathconf),
4002 &exception);
4003 } while (exception.retry);
4004 return err;
4005}
4006
5521abfd 4007int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4008 const struct nfs_open_context *ctx,
4009 const struct nfs_lock_context *l_ctx,
4010 fmode_t fmode)
4011{
4012 const struct nfs_lockowner *lockowner = NULL;
4013
4014 if (l_ctx != NULL)
4015 lockowner = &l_ctx->lockowner;
5521abfd 4016 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4017}
4018EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4019
5521abfd
TM		 4020static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4021 const struct nfs_open_context *ctx,
4022 const struct nfs_lock_context *l_ctx,
4023 fmode_t fmode)
4024{
4025 nfs4_stateid current_stateid;
4026
4027 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
4028 return false;
4029 return nfs4_stateid_match(stateid, &current_stateid);
4030}
4031
4032static bool nfs4_error_stateid_expired(int err)
4033{
4034 switch (err) {
4035 case -NFS4ERR_DELEG_REVOKED:
4036 case -NFS4ERR_ADMIN_REVOKED:
4037 case -NFS4ERR_BAD_STATEID:
4038 case -NFS4ERR_STALE_STATEID:
4039 case -NFS4ERR_OLD_STATEID:
4040 case -NFS4ERR_OPENMODE:
4041 case -NFS4ERR_EXPIRED:
4042 return true;
4043 }
4044 return false;
4045}
4046
d20581aa
BH		 4047void __nfs4_read_done_cb(struct nfs_read_data *data)
4048{
cd841605 4049 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4050}
4051
cbdabc7f 4052static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4053{
cd841605 4054 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4055
cc668ab3 4056 trace_nfs4_read(data, task->tk_status);
9e33bed5 4057 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4058 rpc_restart_call_prepare(task);
ec06c096 4059 return -EAGAIN;
1da177e4 4060 }
8850df99 4061
d20581aa 4062 __nfs4_read_done_cb(data);
1da177e4 4063 if (task->tk_status > 0)
ec06c096
TM		 4064 renew_lease(server, data->timestamp);
4065 return 0;
1da177e4
LT		 4066}
4067
5521abfd
TM		 4068static bool nfs4_read_stateid_changed(struct rpc_task *task,
4069 struct nfs_readargs *args)
4070{
4071
4072 if (!nfs4_error_stateid_expired(task->tk_status) ||
4073 nfs4_stateid_is_current(&args->stateid,
4074 args->context,
4075 args->lock_context,
4076 FMODE_READ))
4077 return false;
4078 rpc_restart_call_prepare(task);
4079 return true;
4080}
4081
cbdabc7f
AA		 4082static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4083{
4084
4085 dprintk("--> %s\n", __func__);
4086
4087 if (!nfs4_sequence_done(task, &data->res.seq_res))
4088 return -EAGAIN;
5521abfd
TM		 4089 if (nfs4_read_stateid_changed(task, &data->args))
4090 return -EAGAIN;
d20581aa
BH		 4091 return data->read_done_cb ? data->read_done_cb(task, data) :
4092 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4093}
4094
bdc7f021 4095static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4096{
1da177e4 4097 data->timestamp = jiffies;
cbdabc7f 4098 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4099 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4100 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4101}
4102
ef1820f9 4103static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4104{
9b206149 4105 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4106 &data->args.seq_args,
4107 &data->res.seq_res,
9b206149 4108 task))
ef1820f9
N		 4109 return 0;
4110 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4111 data->args.lock_context, FMODE_READ) == -EIO)
4112 return -EIO;
4113 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4114 return -EIO;
4115 return 0;
1da177e4
LT		 4116}
4117
b029bc9b 4118static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4119{
cd841605 4120 struct inode *inode = data->header->inode;
1da177e4 4121
cc668ab3 4122 trace_nfs4_write(data, task->tk_status);
9e33bed5 4123 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4124 rpc_restart_call_prepare(task);
788e7a89 4125 return -EAGAIN;
1da177e4 4126 }
4f9838c7 4127 if (task->tk_status >= 0) {
1da177e4 4128 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4129 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4130 }
788e7a89 4131 return 0;
1da177e4
LT		 4132}
4133
5521abfd
TM		 4134static bool nfs4_write_stateid_changed(struct rpc_task *task,
4135 struct nfs_writeargs *args)
4136{
4137
4138 if (!nfs4_error_stateid_expired(task->tk_status) ||
4139 nfs4_stateid_is_current(&args->stateid,
4140 args->context,
4141 args->lock_context,
4142 FMODE_WRITE))
4143 return false;
4144 rpc_restart_call_prepare(task);
4145 return true;
4146}
4147
b029bc9b
FI		 4148static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4149{
4150 if (!nfs4_sequence_done(task, &data->res.seq_res))
4151 return -EAGAIN;
5521abfd
TM		 4152 if (nfs4_write_stateid_changed(task, &data->args))
4153 return -EAGAIN;
d20581aa
BH		 4154 return data->write_done_cb ? data->write_done_cb(task, data) :
4155 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4156}
4157
5a37f851
TM		 4158static
4159bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4160{
5a37f851
TM		 4161 const struct nfs_pgio_header *hdr = data->header;
4162
4163 /* Don't request attributes for pNFS or O_DIRECT writes */
4164 if (data->ds_clp != NULL || hdr->dreq != NULL)
4165 return false;
4166 /* Otherwise, request attributes if and only if we don't hold
4167 * a delegation
4168 */
011e2a7f 4169 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4170}
a69aef14 4171
bdc7f021 4172static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4173{
cd841605 4174 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4175
5a37f851 4176 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4177 data->args.bitmask = NULL;
4178 data->res.fattr = NULL;
4179 } else
4180 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4181
b029bc9b
FI		 4182 if (!data->write_done_cb)
4183 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4184 data->res.server = server;
1da177e4
LT		 4185 data->timestamp = jiffies;
4186
bdc7f021 4187 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4188 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4189}
4190
ef1820f9 4191static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4192{
9b206149 4193 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4194 &data->args.seq_args,
4195 &data->res.seq_res,
9b206149 4196 task))
ef1820f9
N		 4197 return 0;
4198 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4199 data->args.lock_context, FMODE_WRITE) == -EIO)
4200 return -EIO;
4201 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4202 return -EIO;
4203 return 0;
1da177e4
LT		 4204}
4205
0b7c0153 4206static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4207{
d9afbd1b
TM		 4208 nfs4_setup_sequence(NFS_SERVER(data->inode),
4209 &data->args.seq_args,
4210 &data->res.seq_res,
4211 task);
1da177e4
LT		 4212}
4213
0b7c0153 4214static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4215{
1da177e4 4216 struct inode *inode = data->inode;
14516c3a 4217
cc668ab3 4218 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4219 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4220 rpc_restart_call_prepare(task);
788e7a89 4221 return -EAGAIN;
1da177e4 4222 }
788e7a89 4223 return 0;
1da177e4
LT		 4224}
4225
0b7c0153 4226static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4227{
4228 if (!nfs4_sequence_done(task, &data->res.seq_res))
4229 return -EAGAIN;
0b7c0153 4230 return data->commit_done_cb(task, data);
5f452431
FI		 4231}
4232
0b7c0153 4233static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4234{
788e7a89 4235 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4236
0b7c0153
FI		 4237 if (data->commit_done_cb == NULL)
4238 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4239 data->res.server = server;
bdc7f021 4240 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4241 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4242}
4243
9bc4e3ca
CL		 4244struct nfs4_renewdata {
4245 struct nfs_client *client;
4246 unsigned long timestamp;
4247};
4248
1da177e4
LT		 4249/*
4250 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4251 * standalone procedure for queueing an asynchronous RENEW.
4252 */
9bc4e3ca 4253static void nfs4_renew_release(void *calldata)
dc96aef9 4254{
9bc4e3ca
CL		 4255 struct nfs4_renewdata *data = calldata;
4256 struct nfs_client *clp = data->client;
dc96aef9 4257
0851de06
AB		 4258 if (atomic_read(&clp->cl_count) > 1)
4259 nfs4_schedule_state_renewal(clp);
4260 nfs_put_client(clp);
9bc4e3ca 4261 kfree(data);
dc96aef9
AB		 4262}
4263
9bc4e3ca 4264static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4265{
9bc4e3ca
CL		 4266 struct nfs4_renewdata *data = calldata;
4267 struct nfs_client *clp = data->client;
4268 unsigned long timestamp = data->timestamp;
1da177e4 4269
c6d01c6f 4270 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4271 switch (task->tk_status) {
4272 case 0:
4273 break;
4274 case -NFS4ERR_LEASE_MOVED:
4275 nfs4_schedule_lease_moved_recovery(clp);
4276 break;
4277 default:
95baa25c 4278 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4279 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4280 return;
4281 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4282 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4283 return;
4284 }
4285 nfs4_schedule_path_down_recovery(clp);
1da177e4 4286 }
452e9352 4287 do_renew_lease(clp, timestamp);
1da177e4
LT		 4288}
4289
963d8fe5
TM		 4290static const struct rpc_call_ops nfs4_renew_ops = {
4291 .rpc_call_done = nfs4_renew_done,
dc96aef9 4292 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4293};
4294
2f60ea6b 4295static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4296{
4297 struct rpc_message msg = {
4298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4299 .rpc_argp = clp,
b4454fe1 4300 .rpc_cred = cred,
1da177e4 4301 };
9bc4e3ca 4302 struct nfs4_renewdata *data;
1da177e4 4303
2f60ea6b
TM		 4304 if (renew_flags == 0)
4305 return 0;
0851de06
AB		 4306 if (!atomic_inc_not_zero(&clp->cl_count))
4307 return -EIO;
b569ad34 4308 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4309 if (data == NULL)
4310 return -ENOMEM;
4311 data->client = clp;
4312 data->timestamp = jiffies;
bc7a05ca 4313 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4314 &nfs4_renew_ops, data);
1da177e4
LT		 4315}
4316
8534d4ec 4317static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4318{
4319 struct rpc_message msg = {
4320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4321 .rpc_argp = clp,
b4454fe1 4322 .rpc_cred = cred,
1da177e4
LT		 4323 };
4324 unsigned long now = jiffies;
4325 int status;
4326
bc7a05ca 4327 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4328 if (status < 0)
4329 return status;
452e9352 4330 do_renew_lease(clp, now);
1da177e4
LT		 4331 return 0;
4332}
4333
aa1870af
BF		 4334static inline int nfs4_server_supports_acls(struct nfs_server *server)
4335{
7dd7d959 4336 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4337}
4338
21f498c2
TM		 4339/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4340 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4341 * the stack.
4342 */
21f498c2 4343#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4344
e9e3d724
NH		 4345static int buf_to_pages_noslab(const void *buf, size_t buflen,
4346 struct page **pages, unsigned int *pgbase)
4347{
4348 struct page *newpage, **spages;
4349 int rc = 0;
4350 size_t len;
4351 spages = pages;
4352
4353 do {
21f498c2 4354 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4355 newpage = alloc_page(GFP_KERNEL);
4356
4357 if (newpage == NULL)
4358 goto unwind;
4359 memcpy(page_address(newpage), buf, len);
4360 buf += len;
4361 buflen -= len;
4362 *pages++ = newpage;
4363 rc++;
4364 } while (buflen != 0);
4365
4366 return rc;
4367
4368unwind:
4369 for(; rc > 0; rc--)
4370 __free_page(spages[rc-1]);
4371 return -ENOMEM;
4372}
4373
e50a1c2e
BF		 4374struct nfs4_cached_acl {
4375 int cached;
4376 size_t len;
3e9d4154 4377 char data[0];
e50a1c2e
BF		 4378};
4379
4380static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4381{
4382 struct nfs_inode *nfsi = NFS_I(inode);
4383
4384 spin_lock(&inode->i_lock);
4385 kfree(nfsi->nfs4_acl);
4386 nfsi->nfs4_acl = acl;
4387 spin_unlock(&inode->i_lock);
4388}
4389
4390static void nfs4_zap_acl_attr(struct inode *inode)
4391{
4392 nfs4_set_cached_acl(inode, NULL);
4393}
4394
4395static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4396{
4397 struct nfs_inode *nfsi = NFS_I(inode);
4398 struct nfs4_cached_acl *acl;
4399 int ret = -ENOENT;
4400
4401 spin_lock(&inode->i_lock);
4402 acl = nfsi->nfs4_acl;
4403 if (acl == NULL)
4404 goto out;
4405 if (buf == NULL) /* user is just asking for length */
4406 goto out_len;
4407 if (acl->cached == 0)
4408 goto out;
4409 ret = -ERANGE; /* see getxattr(2) man page */
4410 if (acl->len > buflen)
4411 goto out;
4412 memcpy(buf, acl->data, acl->len);
4413out_len:
4414 ret = acl->len;
4415out:
4416 spin_unlock(&inode->i_lock);
4417 return ret;
4418}
4419
5794d21e 4420static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4421{
4422 struct nfs4_cached_acl *acl;
b291f1b1 4423 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4424
1f1ea6c2 4425 if (buflen <= PAGE_SIZE) {
b291f1b1 4426 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4427 if (acl == NULL)
4428 goto out;
4429 acl->cached = 1;
5794d21e 4430 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4431 } else {
4432 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4433 if (acl == NULL)
4434 goto out;
4435 acl->cached = 0;
4436 }
4437 acl->len = acl_len;
4438out:
4439 nfs4_set_cached_acl(inode, acl);
4440}
4441
bf118a34
AA		 4442/*
4443 * The getxattr API returns the required buffer length when called with a
4444 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4445 * the required buf. On a NULL buf, we send a page of data to the server
4446 * guessing that the ACL request can be serviced by a page. If so, we cache
4447 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4448 * the cache. If not so, we throw away the page, and cache the required
4449 * length. The next getxattr call will then produce another round trip to
4450 * the server, this time with the input buf of the required size.
4451 */
16b4289c 4452static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4453{
bf118a34 4454 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4455 struct nfs_getaclargs args = {
4456 .fh = NFS_FH(inode),
4457 .acl_pages = pages,
4458 .acl_len = buflen,
4459 };
663c79b3
BH		 4460 struct nfs_getaclres res = {
4461 .acl_len = buflen,
4462 };
aa1870af
BF		 4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4465 .rpc_argp = &args,
663c79b3 4466 .rpc_resp = &res,
aa1870af 4467 };
21f498c2
TM		 4468 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4469 int ret = -ENOMEM, i;
aa1870af 4470
bf118a34
AA		 4471 /* As long as we're doing a round trip to the server anyway,
4472 * let's be prepared for a page of acl data. */
4473 if (npages == 0)
4474 npages = 1;
21f498c2
TM		 4475 if (npages > ARRAY_SIZE(pages))
4476 return -ERANGE;
5a006899 4477
bf118a34
AA		 4478 for (i = 0; i < npages; i++) {
4479 pages[i] = alloc_page(GFP_KERNEL);
4480 if (!pages[i])
4481 goto out_free;
e50a1c2e 4482 }
5a006899
SP		 4483
4484 /* for decoding across pages */
4485 res.acl_scratch = alloc_page(GFP_KERNEL);
4486 if (!res.acl_scratch)
4487 goto out_free;
4488
bf118a34
AA		 4489 args.acl_len = npages * PAGE_SIZE;
4490 args.acl_pgbase = 0;
5a006899 4491
de040bec 4492 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4493 __func__, buf, buflen, npages, args.acl_len);
4494 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4495 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4496 if (ret)
4497 goto out_free;
bf118a34 4498
1f1ea6c2
TM		 4499 /* Handle the case where the passed-in buffer is too short */
4500 if (res.acl_flags & NFS4_ACL_TRUNC) {
4501 /* Did the user only issue a request for the acl length? */
4502 if (buf == NULL)
4503 goto out_ok;
e50a1c2e 4504 ret = -ERANGE;
1f1ea6c2 4505 goto out_free;
e50a1c2e 4506 }
1f1ea6c2 4507 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4508 if (buf) {
4509 if (res.acl_len > buflen) {
4510 ret = -ERANGE;
4511 goto out_free;
4512 }
1f1ea6c2 4513 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4514 }
1f1ea6c2
TM		 4515out_ok:
4516 ret = res.acl_len;
e50a1c2e 4517out_free:
bf118a34
AA		 4518 for (i = 0; i < npages; i++)
4519 if (pages[i])
4520 __free_page(pages[i]);
331818f1
TM		 4521 if (res.acl_scratch)
4522 __free_page(res.acl_scratch);
aa1870af
BF		 4523 return ret;
4524}
4525
16b4289c
TM		 4526static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4527{
4528 struct nfs4_exception exception = { };
4529 ssize_t ret;
4530 do {
4531 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4532 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4533 if (ret >= 0)
4534 break;
4535 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4536 } while (exception.retry);
4537 return ret;
4538}
4539
e50a1c2e
BF		 4540static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4541{
4542 struct nfs_server *server = NFS_SERVER(inode);
4543 int ret;
4544
4545 if (!nfs4_server_supports_acls(server))
4546 return -EOPNOTSUPP;
4547 ret = nfs_revalidate_inode(server, inode);
4548 if (ret < 0)
4549 return ret;
08a22b39
AK		 4550 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4551 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4552 ret = nfs4_read_cached_acl(inode, buf, buflen);
4553 if (ret != -ENOENT)
bf118a34
AA		 4554 /* -ENOENT is returned if there is no ACL or if there is an ACL
4555 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4556 return ret;
4557 return nfs4_get_acl_uncached(inode, buf, buflen);
4558}
4559
16b4289c 4560static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4561{
4562 struct nfs_server *server = NFS_SERVER(inode);
4563 struct page *pages[NFS4ACL_MAXPAGES];
4564 struct nfs_setaclargs arg = {
4565 .fh = NFS_FH(inode),
4566 .acl_pages = pages,
4567 .acl_len = buflen,
4568 };
73c403a9 4569 struct nfs_setaclres res;
4b580ee3
BF		 4570 struct rpc_message msg = {
4571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4572 .rpc_argp = &arg,
73c403a9 4573 .rpc_resp = &res,
4b580ee3 4574 };
21f498c2 4575 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4576 int ret, i;
4b580ee3
BF		 4577
4578 if (!nfs4_server_supports_acls(server))
4579 return -EOPNOTSUPP;
21f498c2
TM		 4580 if (npages > ARRAY_SIZE(pages))
4581 return -ERANGE;
e9e3d724
NH		 4582 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4583 if (i < 0)
4584 return i;
57ec14c5 4585 nfs4_inode_return_delegation(inode);
7c513058 4586 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4587
4588 /*
4589 * Free each page after tx, so the only ref left is
4590 * held by the network stack
4591 */
4592 for (; i > 0; i--)
4593 put_page(pages[i-1]);
4594
08a22b39
AK		 4595 /*
4596 * Acl update can result in inode attribute update.
4597 * so mark the attribute cache invalid.
4598 */
4599 spin_lock(&inode->i_lock);
4600 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4601 spin_unlock(&inode->i_lock);
f41f7418
TM		 4602 nfs_access_zap_cache(inode);
4603 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4604 return ret;
4605}
4606
16b4289c
TM		 4607static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4608{
4609 struct nfs4_exception exception = { };
4610 int err;
4611 do {
c1578b76
TM		 4612 err = __nfs4_proc_set_acl(inode, buf, buflen);
4613 trace_nfs4_set_acl(inode, err);
4614 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4615 &exception);
4616 } while (exception.retry);
4617 return err;
4618}
4619
aa9c2669
DQ		 4620#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4621static int _nfs4_get_security_label(struct inode *inode, void *buf,
4622 size_t buflen)
4623{
4624 struct nfs_server *server = NFS_SERVER(inode);
4625 struct nfs_fattr fattr;
4626 struct nfs4_label label = {0, 0, buflen, buf};
4627
4628 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4629 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4630 .fh = NFS_FH(inode),
4631 .bitmask = bitmask,
4632 };
4633 struct nfs4_getattr_res res = {
4634 .fattr = &fattr,
4635 .label = &label,
4636 .server = server,
4637 };
4638 struct rpc_message msg = {
4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4640 .rpc_argp = &arg,
aa9c2669
DQ		 4641 .rpc_resp = &res,
4642 };
4643 int ret;
4644
4645 nfs_fattr_init(&fattr);
4646
fcb63a9b 4647 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4648 if (ret)
4649 return ret;
4650 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4651 return -ENOENT;
4652 if (buflen < label.len)
4653 return -ERANGE;
4654 return 0;
4655}
4656
4657static int nfs4_get_security_label(struct inode *inode, void *buf,
4658 size_t buflen)
4659{
4660 struct nfs4_exception exception = { };
4661 int err;
4662
4663 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4664 return -EOPNOTSUPP;
4665
4666 do {
c1578b76
TM		 4667 err = _nfs4_get_security_label(inode, buf, buflen);
4668 trace_nfs4_get_security_label(inode, err);
4669 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4670 &exception);
4671 } while (exception.retry);
4672 return err;
4673}
4674
4675static int _nfs4_do_set_security_label(struct inode *inode,
4676 struct nfs4_label *ilabel,
4677 struct nfs_fattr *fattr,
4678 struct nfs4_label *olabel)
4679{
4680
4681 struct iattr sattr = {0};
4682 struct nfs_server *server = NFS_SERVER(inode);
4683 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4684 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4685 .fh = NFS_FH(inode),
4686 .iap = &sattr,
4687 .server = server,
4688 .bitmask = bitmask,
4689 .label = ilabel,
4690 };
4691 struct nfs_setattrres res = {
4692 .fattr = fattr,
4693 .label = olabel,
4694 .server = server,
4695 };
4696 struct rpc_message msg = {
4697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4698 .rpc_argp = &arg,
aa9c2669
DQ		 4699 .rpc_resp = &res,
4700 };
4701 int status;
4702
12207f69 4703 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4704
12207f69 4705 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4706 if (status)
4707 dprintk("%s failed: %d\n", __func__, status);
4708
4709 return status;
4710}
4711
4712static int nfs4_do_set_security_label(struct inode *inode,
4713 struct nfs4_label *ilabel,
4714 struct nfs_fattr *fattr,
4715 struct nfs4_label *olabel)
4716{
4717 struct nfs4_exception exception = { };
4718 int err;
4719
4720 do {
c1578b76
TM		 4721 err = _nfs4_do_set_security_label(inode, ilabel,
4722 fattr, olabel);
4723 trace_nfs4_set_security_label(inode, err);
4724 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4725 &exception);
4726 } while (exception.retry);
4727 return err;
4728}
4729
4730static int
4731nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4732{
4733 struct nfs4_label ilabel, *olabel = NULL;
4734 struct nfs_fattr fattr;
4735 struct rpc_cred *cred;
4736 struct inode *inode = dentry->d_inode;
4737 int status;
4738
4739 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4740 return -EOPNOTSUPP;
4741
4742 nfs_fattr_init(&fattr);
4743
4744 ilabel.pi = 0;
4745 ilabel.lfs = 0;
4746 ilabel.label = (char *)buf;
4747 ilabel.len = buflen;
4748
4749 cred = rpc_lookup_cred();
4750 if (IS_ERR(cred))
4751 return PTR_ERR(cred);
4752
4753 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4754 if (IS_ERR(olabel)) {
4755 status = -PTR_ERR(olabel);
4756 goto out;
4757 }
4758
4759 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4760 if (status == 0)
4761 nfs_setsecurity(inode, &fattr, olabel);
4762
4763 nfs4_label_free(olabel);
4764out:
4765 put_rpccred(cred);
4766 return status;
4767}
4768#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4769
4770
1da177e4 4771static int
aa5190d0 4772nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4773{
aa5190d0
TM		 4774 struct nfs_client *clp = server->nfs_client;
4775
4776 if (task->tk_status >= 0)
1da177e4
LT		 4777 return 0;
4778 switch(task->tk_status) {
a1d0b5ee 4779 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4780 case -NFS4ERR_ADMIN_REVOKED:
4781 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4782 if (state == NULL)
4783 break;
4784 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4785 case -NFS4ERR_OPENMODE:
4786 if (state == NULL)
4787 break;
5d422301 4788 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4789 goto recovery_failed;
0400a6b0 4790 goto wait_on_recovery;
0ced63d1 4791 case -NFS4ERR_EXPIRED:
5d422301
TM		 4792 if (state != NULL) {
4793 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4794 goto recovery_failed;
5d422301 4795 }
1da177e4 4796 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4797 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4798 nfs4_schedule_lease_recovery(clp);
4799 goto wait_on_recovery;
519ae255
CL		 4800 case -NFS4ERR_MOVED:
4801 if (nfs4_schedule_migration_recovery(server) < 0)
4802 goto recovery_failed;
4803 goto wait_on_recovery;
8ef2f8d4
CL		 4804 case -NFS4ERR_LEASE_MOVED:
4805 nfs4_schedule_lease_moved_recovery(clp);
4806 goto wait_on_recovery;
4745e315
AA		 4807#if defined(CONFIG_NFS_V4_1)
4808 case -NFS4ERR_BADSESSION:
4809 case -NFS4ERR_BADSLOT:
4810 case -NFS4ERR_BAD_HIGH_SLOT:
4811 case -NFS4ERR_DEADSESSION:
4812 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4813 case -NFS4ERR_SEQ_FALSE_RETRY:
4814 case -NFS4ERR_SEQ_MISORDERED:
4815 dprintk("%s ERROR %d, Reset session\n", __func__,
4816 task->tk_status);
9f594791 4817 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4818 goto wait_on_recovery;
4745e315 4819#endif /* CONFIG_NFS_V4_1 */
1da177e4 4820 case -NFS4ERR_DELAY:
aa5190d0 4821 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4822 case -NFS4ERR_GRACE:
1da177e4 4823 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4824 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4825 case -NFS4ERR_OLD_STATEID:
f1478c13 4826 goto restart_call;
1da177e4
LT		 4827 }
4828 task->tk_status = nfs4_map_errors(task->tk_status);
4829 return 0;
9f51a78e 4830recovery_failed:
5d422301
TM		 4831 task->tk_status = -EIO;
4832 return 0;
0400a6b0 4833wait_on_recovery:
a2c0b9e2 4834 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4835 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4836 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4837 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4838 goto recovery_failed;
f1478c13 4839restart_call:
a2c0b9e2
TM		 4840 task->tk_status = 0;
4841 return -EAGAIN;
1da177e4
LT		 4842}
4843
f092075d
CL		 4844static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4845 nfs4_verifier *bootverf)
cd93710e
CL		 4846{
4847 __be32 verf[2];
4848
2c820d9a
CL		 4849 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4850 /* An impossible timestamp guarantees this value
4851 * will never match a generated boot time. */
4852 verf[0] = 0;
17f26b12 4853 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4854 } else {
f092075d 4855 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4856 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4857 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4858 }
cd93710e
CL		 4859 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4860}
4861
e984a55a
CL		 4862static unsigned int
4863nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4864 char *buf, size_t len)
4865{
4866 unsigned int result;
4867
4868 rcu_read_lock();
4869 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4870 clp->cl_ipaddr,
4871 rpc_peeraddr2str(clp->cl_rpcclient,
4872 RPC_DISPLAY_ADDR),
4873 rpc_peeraddr2str(clp->cl_rpcclient,
4874 RPC_DISPLAY_PROTO));
4875 rcu_read_unlock();
4876 return result;
4877}
4878
4879static unsigned int
4880nfs4_init_uniform_client_string(const struct nfs_client *clp,
4881 char *buf, size_t len)
4882{
55b59293 4883 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4884
4885 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4886 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4887 clp->rpc_ops->version,
4888 clp->cl_minorversion,
4889 nfs4_client_id_uniquifier,
4890 nodename);
e984a55a
CL		 4891 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4892 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4893 nodename);
e984a55a
CL		 4894}
4895
6bbb4ae8
CL		 4896/**
4897 * nfs4_proc_setclientid - Negotiate client ID
4898 * @clp: state data structure
4899 * @program: RPC program for NFSv4 callback service
4900 * @port: IP port number for NFS4 callback service
4901 * @cred: RPC credential to use for this call
4902 * @res: where to place the result
4903 *
4904 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4905 */
bb8b27e5
TM		 4906int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4907 unsigned short port, struct rpc_cred *cred,
4908 struct nfs4_setclientid_res *res)
1da177e4
LT		 4909{
4910 nfs4_verifier sc_verifier;
4911 struct nfs4_setclientid setclientid = {
4912 .sc_verifier = &sc_verifier,
4913 .sc_prog = program,
f4eecd5d 4914 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4915 };
4916 struct rpc_message msg = {
4917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4918 .rpc_argp = &setclientid,
bb8b27e5 4919 .rpc_resp = res,
286d7d6a 4920 .rpc_cred = cred,
1da177e4 4921 };
6bbb4ae8 4922 int status;
1da177e4 4923
de734831 4924 /* nfs_client_id4 */
f092075d 4925 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4926 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4927 setclientid.sc_name_len =
4928 nfs4_init_uniform_client_string(clp,
4929 setclientid.sc_name,
4930 sizeof(setclientid.sc_name));
4931 else
4932 setclientid.sc_name_len =
4933 nfs4_init_nonuniform_client_string(clp,
4934 setclientid.sc_name,
4935 sizeof(setclientid.sc_name));
de734831 4936 /* cb_client4 */
e984a55a 4937 rcu_read_lock();
de734831 4938 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4939 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4940 rpc_peeraddr2str(clp->cl_rpcclient,
4941 RPC_DISPLAY_NETID));
de734831
CL		 4942 rcu_read_unlock();
4943 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4944 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4945 clp->cl_ipaddr, port >> 8, port & 255);
4946
6bbb4ae8
CL		 4947 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4948 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4949 setclientid.sc_name_len, setclientid.sc_name);
4950 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4951 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4952 dprintk("NFS reply setclientid: %d\n", status);
4953 return status;
1da177e4
LT		 4954}
4955
6bbb4ae8
CL		 4956/**
4957 * nfs4_proc_setclientid_confirm - Confirm client ID
4958 * @clp: state data structure
4959 * @res: result of a previous SETCLIENTID
4960 * @cred: RPC credential to use for this call
4961 *
4962 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4963 */
fd954ae1 4964int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4965 struct nfs4_setclientid_res *arg,
4966 struct rpc_cred *cred)
1da177e4 4967{
1da177e4
LT		 4968 struct rpc_message msg = {
4969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4970 .rpc_argp = arg,
286d7d6a 4971 .rpc_cred = cred,
1da177e4 4972 };
1da177e4
LT		 4973 int status;
4974
6bbb4ae8
CL		 4975 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4976 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4977 clp->cl_clientid);
1bd714f2 4978 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4979 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4980 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4981 return status;
4982}
4983
fe650407
TM		 4984struct nfs4_delegreturndata {
4985 struct nfs4_delegreturnargs args;
fa178f29 4986 struct nfs4_delegreturnres res;
fe650407
TM		 4987 struct nfs_fh fh;
4988 nfs4_stateid stateid;
26e976a8 4989 unsigned long timestamp;
fa178f29 4990 struct nfs_fattr fattr;
fe650407
TM		 4991 int rpc_status;
4992};
4993
fe650407
TM		 4994static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4995{
4996 struct nfs4_delegreturndata *data = calldata;
938e1010 4997
14516c3a
TM		 4998 if (!nfs4_sequence_done(task, &data->res.seq_res))
4999 return;
938e1010 5000
ca8acf8d 5001 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5002 switch (task->tk_status) {
79708861 5003 case 0:
fa178f29 5004 renew_lease(data->res.server, data->timestamp);
79708861 5005 break;
c97cf606
TM		 5006 case -NFS4ERR_ADMIN_REVOKED:
5007 case -NFS4ERR_DELEG_REVOKED:
5008 case -NFS4ERR_BAD_STATEID:
5009 case -NFS4ERR_OLD_STATEID:
5010 case -NFS4ERR_STALE_STATEID:
5011 case -NFS4ERR_EXPIRED:
5012 task->tk_status = 0;
5013 break;
79708861
RL		 5014 default:
5015 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5016 -EAGAIN) {
d00c5d43 5017 rpc_restart_call_prepare(task);
79708861
RL		 5018 return;
5019 }
5020 }
5021 data->rpc_status = task->tk_status;
fe650407
TM		 5022}
5023
5024static void nfs4_delegreturn_release(void *calldata)
5025{
fe650407
TM		 5026 kfree(calldata);
5027}
5028
938e1010
AA		 5029static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5030{
5031 struct nfs4_delegreturndata *d_data;
5032
5033 d_data = (struct nfs4_delegreturndata *)data;
5034
d9afbd1b
TM		 5035 nfs4_setup_sequence(d_data->res.server,
5036 &d_data->args.seq_args,
5037 &d_data->res.seq_res,
5038 task);
938e1010 5039}
938e1010 5040
c8d149f3 5041static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5042 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5043 .rpc_call_done = nfs4_delegreturn_done,
5044 .rpc_release = nfs4_delegreturn_release,
5045};
5046
e6f81075 5047static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5048{
5049 struct nfs4_delegreturndata *data;
fa178f29 5050 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5051 struct rpc_task *task;
5138fde0
TM		 5052 struct rpc_message msg = {
5053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5054 .rpc_cred = cred,
5055 };
c970aa85
TM		 5056 struct rpc_task_setup task_setup_data = {
5057 .rpc_client = server->client,
5138fde0 5058 .rpc_message = &msg,
c970aa85
TM		 5059 .callback_ops = &nfs4_delegreturn_ops,
5060 .flags = RPC_TASK_ASYNC,
5061 };
e6f81075 5062 int status = 0;
fe650407 5063
8535b2be 5064 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5065 if (data == NULL)
5066 return -ENOMEM;
a9c92d6b 5067 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5068 data->args.fhandle = &data->fh;
5069 data->args.stateid = &data->stateid;
9e907fec 5070 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5071 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5072 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5073 data->res.fattr = &data->fattr;
5074 data->res.server = server;
5138fde0 5075 nfs_fattr_init(data->res.fattr);
26e976a8 5076 data->timestamp = jiffies;
fe650407
TM		 5077 data->rpc_status = 0;
5078
c970aa85 5079 task_setup_data.callback_data = data;
1174dd1f
TM		 5080 msg.rpc_argp = &data->args;
5081 msg.rpc_resp = &data->res;
c970aa85 5082 task = rpc_run_task(&task_setup_data);
7a1218a2 5083 if (IS_ERR(task))
fe650407 5084 return PTR_ERR(task);
e6f81075
TM		 5085 if (!issync)
5086 goto out;
fe650407 5087 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5088 if (status != 0)
5089 goto out;
5090 status = data->rpc_status;
e144cbcc
TM		 5091 if (status == 0)
5092 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5093 else
5094 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5095out:
e6b3c4db 5096 rpc_put_task(task);
fe650407 5097 return status;
1da177e4
LT		 5098}
5099
e6f81075 5100int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5101{
5102 struct nfs_server *server = NFS_SERVER(inode);
5103 struct nfs4_exception exception = { };
5104 int err;
5105 do {
e6f81075 5106 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5107 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5108 switch (err) {
5109 case -NFS4ERR_STALE_STATEID:
5110 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5111 case 0:
5112 return 0;
5113 }
5114 err = nfs4_handle_exception(server, err, &exception);
5115 } while (exception.retry);
5116 return err;
5117}
5118
5119#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5120#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5121
5122/*
5123 * sleep, with exponential backoff, and retry the LOCK operation.
5124 */
5125static unsigned long
5126nfs4_set_lock_task_retry(unsigned long timeout)
5127{
416ad3c9 5128 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5129 timeout <<= 1;
5130 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5131 return NFS4_LOCK_MAXTIMEOUT;
5132 return timeout;
5133}
5134
1da177e4
LT		 5135static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5136{
5137 struct inode *inode = state->inode;
5138 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5139 struct nfs_client *clp = server->nfs_client;
911d1aaf 5140 struct nfs_lockt_args arg = {
1da177e4 5141 .fh = NFS_FH(inode),
911d1aaf 5142 .fl = request,
1da177e4 5143 };
911d1aaf
TM		 5144 struct nfs_lockt_res res = {
5145 .denied = request,
1da177e4
LT		 5146 };
5147 struct rpc_message msg = {
5148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5149 .rpc_argp = &arg,
5150 .rpc_resp = &res,
5151 .rpc_cred = state->owner->so_cred,
5152 };
1da177e4
LT		 5153 struct nfs4_lock_state *lsp;
5154 int status;
5155
911d1aaf 5156 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5157 status = nfs4_set_lock_state(state, request);
5158 if (status != 0)
5159 goto out;
5160 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5161 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5162 arg.lock_owner.s_dev = server->s_dev;
7c513058 5163 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5164 switch (status) {
5165 case 0:
5166 request->fl_type = F_UNLCK;
5167 break;
5168 case -NFS4ERR_DENIED:
5169 status = 0;
1da177e4 5170 }
70cc6487 5171 request->fl_ops->fl_release_private(request);
a6f951dd 5172 request->fl_ops = NULL;
8d0a8a9d 5173out:
1da177e4
LT		 5174 return status;
5175}
5176
5177static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5178{
5179 struct nfs4_exception exception = { };
5180 int err;
5181
5182 do {
d1b748a5
TM		 5183 err = _nfs4_proc_getlk(state, cmd, request);
5184 trace_nfs4_get_lock(request, state, cmd, err);
5185 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5186 &exception);
5187 } while (exception.retry);
5188 return err;
5189}
5190
5191static int do_vfs_lock(struct file *file, struct file_lock *fl)
5192{
5193 int res = 0;
5194 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5195 case FL_POSIX:
5196 res = posix_lock_file_wait(file, fl);
5197 break;
5198 case FL_FLOCK:
5199 res = flock_lock_file_wait(file, fl);
5200 break;
5201 default:
5202 BUG();
5203 }
1da177e4
LT		 5204 return res;
5205}
5206
faf5f49c 5207struct nfs4_unlockdata {
911d1aaf
TM		 5208 struct nfs_locku_args arg;
5209 struct nfs_locku_res res;
faf5f49c
TM		 5210 struct nfs4_lock_state *lsp;
5211 struct nfs_open_context *ctx;
911d1aaf
TM		 5212 struct file_lock fl;
5213 const struct nfs_server *server;
26e976a8 5214 unsigned long timestamp;
faf5f49c
TM		 5215};
5216
911d1aaf
TM		 5217static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5218 struct nfs_open_context *ctx,
5219 struct nfs4_lock_state *lsp,
5220 struct nfs_seqid *seqid)
5221{
5222 struct nfs4_unlockdata *p;
5223 struct inode *inode = lsp->ls_state->inode;
5224
8535b2be 5225 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5226 if (p == NULL)
5227 return NULL;
5228 p->arg.fh = NFS_FH(inode);
5229 p->arg.fl = &p->fl;
5230 p->arg.seqid = seqid;
c1d51931 5231 p->res.seqid = seqid;
911d1aaf
TM		 5232 p->arg.stateid = &lsp->ls_stateid;
5233 p->lsp = lsp;
5234 atomic_inc(&lsp->ls_count);
5235 /* Ensure we don't close file until we're done freeing locks! */
5236 p->ctx = get_nfs_open_context(ctx);
5237 memcpy(&p->fl, fl, sizeof(p->fl));
5238 p->server = NFS_SERVER(inode);
5239 return p;
5240}
5241
06f814a3 5242static void nfs4_locku_release_calldata(void *data)
faf5f49c 5243{
963d8fe5 5244 struct nfs4_unlockdata *calldata = data;
911d1aaf 5245 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5246 nfs4_put_lock_state(calldata->lsp);
5247 put_nfs_open_context(calldata->ctx);
5248 kfree(calldata);
faf5f49c
TM		 5249}
5250
963d8fe5 5251static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5252{
963d8fe5 5253 struct nfs4_unlockdata *calldata = data;
faf5f49c 5254
14516c3a
TM		 5255 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5256 return;
faf5f49c
TM		 5257 switch (task->tk_status) {
5258 case 0:
f597c537
TM		 5259 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5260 &calldata->res.stateid);
26e976a8 5261 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5262 break;
9e33bed5
TM		 5263 case -NFS4ERR_BAD_STATEID:
5264 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5265 case -NFS4ERR_STALE_STATEID:
5266 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5267 break;
5268 default:
9e33bed5 5269 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5270 rpc_restart_call_prepare(task);
faf5f49c 5271 }
2b1bc308 5272 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5273}
5274
4ce70ada 5275static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5276{
4ce70ada 5277 struct nfs4_unlockdata *calldata = data;
faf5f49c 5278
911d1aaf 5279 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5280 goto out_wait;
795a88c9 5281 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5282 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5283 goto out_no_action;
faf5f49c 5284 }
26e976a8 5285 calldata->timestamp = jiffies;
035168ab 5286 if (nfs4_setup_sequence(calldata->server,
a893693c 5287 &calldata->arg.seq_args,
2240a9e2
TM		 5288 &calldata->res.seq_res,
5289 task) != 0)
5290 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5291 return;
5292out_no_action:
5293 task->tk_action = NULL;
5294out_wait:
5295 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5296}
5297
963d8fe5 5298static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5299 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5300 .rpc_call_done = nfs4_locku_done,
06f814a3 5301 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5302};
5303
a5d16a4d
TM		 5304static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5305 struct nfs_open_context *ctx,
5306 struct nfs4_lock_state *lsp,
5307 struct nfs_seqid *seqid)
5308{
5309 struct nfs4_unlockdata *data;
5138fde0
TM		 5310 struct rpc_message msg = {
5311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5312 .rpc_cred = ctx->cred,
5313 };
c970aa85
TM		 5314 struct rpc_task_setup task_setup_data = {
5315 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5316 .rpc_message = &msg,
c970aa85 5317 .callback_ops = &nfs4_locku_ops,
101070ca 5318 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5319 .flags = RPC_TASK_ASYNC,
5320 };
a5d16a4d 5321
fa940720
WAA		 5322 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5323 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5324
137d6aca
FF		 5325 /* Ensure this is an unlock - when canceling a lock, the
5326 * canceled lock is passed in, and it won't be an unlock.
5327 */
5328 fl->fl_type = F_UNLCK;
5329
a5d16a4d
TM		 5330 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5331 if (data == NULL) {
5332 nfs_free_seqid(seqid);
5333 return ERR_PTR(-ENOMEM);
5334 }
5335
a9c92d6b 5336 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5337 msg.rpc_argp = &data->arg;
5338 msg.rpc_resp = &data->res;
c970aa85
TM		 5339 task_setup_data.callback_data = data;
5340 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5341}
5342
faf5f49c
TM		 5343static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5344{
65b62a29
TM		 5345 struct inode *inode = state->inode;
5346 struct nfs4_state_owner *sp = state->owner;
5347 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5348 struct nfs_seqid *seqid;
1da177e4 5349 struct nfs4_lock_state *lsp;
06f814a3
TM		 5350 struct rpc_task *task;
5351 int status = 0;
536ff0f8 5352 unsigned char fl_flags = request->fl_flags;
faf5f49c 5353
8d0a8a9d 5354 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5355 /* Unlock _before_ we do the RPC call */
5356 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5357 /* Exclude nfs_delegation_claim_locks() */
5358 mutex_lock(&sp->so_delegreturn_mutex);
5359 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5360 down_read(&nfsi->rwsem);
5361 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5362 up_read(&nfsi->rwsem);
65b62a29 5363 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5364 goto out;
19e03c57
TM		 5365 }
5366 up_read(&nfsi->rwsem);
65b62a29 5367 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5368 if (status != 0)
9b073574
TM		 5369 goto out;
5370 /* Is this a delegated lock? */
8d0a8a9d 5371 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5372 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5373 goto out;
8535b2be 5374 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5375 status = -ENOMEM;
911d1aaf 5376 if (seqid == NULL)
9b073574 5377 goto out;
cd3758e3 5378 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5379 status = PTR_ERR(task);
5380 if (IS_ERR(task))
9b073574 5381 goto out;
a5d16a4d 5382 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5383 rpc_put_task(task);
9b073574 5384out:
536ff0f8 5385 request->fl_flags = fl_flags;
d1b748a5 5386 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5387 return status;
5388}
5389
a5d16a4d
TM		 5390struct nfs4_lockdata {
5391 struct nfs_lock_args arg;
5392 struct nfs_lock_res res;
5393 struct nfs4_lock_state *lsp;
5394 struct nfs_open_context *ctx;
5395 struct file_lock fl;
26e976a8 5396 unsigned long timestamp;
a5d16a4d
TM		 5397 int rpc_status;
5398 int cancelled;
66179efe 5399 struct nfs_server *server;
a5d16a4d
TM		 5400};
5401
5402static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5403 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5404 gfp_t gfp_mask)
1da177e4 5405{
a5d16a4d
TM		 5406 struct nfs4_lockdata *p;
5407 struct inode *inode = lsp->ls_state->inode;
1da177e4 5408 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5409
8535b2be 5410 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5411 if (p == NULL)
5412 return NULL;
5413
5414 p->arg.fh = NFS_FH(inode);
5415 p->arg.fl = &p->fl;
8535b2be 5416 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5417 if (p->arg.open_seqid == NULL)
5418 goto out_free;
8535b2be 5419 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5420 if (p->arg.lock_seqid == NULL)
2f74c0a0 5421 goto out_free_seqid;
a5d16a4d 5422 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5423 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5424 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5425 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5426 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5427 p->lsp = lsp;
66179efe 5428 p->server = server;
a5d16a4d
TM		 5429 atomic_inc(&lsp->ls_count);
5430 p->ctx = get_nfs_open_context(ctx);
5431 memcpy(&p->fl, fl, sizeof(p->fl));
5432 return p;
2f74c0a0
TM		 5433out_free_seqid:
5434 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5435out_free:
5436 kfree(p);
5437 return NULL;
5438}
5439
5440static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5441{
5442 struct nfs4_lockdata *data = calldata;
5443 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5444
3110ff80 5445 dprintk("%s: begin!\n", __func__);
2f74c0a0 5446 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5447 goto out_wait;
a5d16a4d
TM		 5448 /* Do we need to do an open_to_lock_owner? */
5449 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5450 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5451 goto out_release_lock_seqid;
8fe72bac 5452 }
8e472f33 5453 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5454 data->arg.new_lock_owner = 1;
c1d51931 5455 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5456 } else
5457 data->arg.new_lock_owner = 0;
5d422301
TM		 5458 if (!nfs4_valid_open_stateid(state)) {
5459 data->rpc_status = -EBADF;
5460 task->tk_action = NULL;
5461 goto out_release_open_seqid;
5462 }
26e976a8 5463 data->timestamp = jiffies;
035168ab
TM		 5464 if (nfs4_setup_sequence(data->server,
5465 &data->arg.seq_args,
2240a9e2 5466 &data->res.seq_res,
d9afbd1b 5467 task) == 0)
66179efe 5468 return;
5d422301 5469out_release_open_seqid:
2240a9e2
TM		 5470 nfs_release_seqid(data->arg.open_seqid);
5471out_release_lock_seqid:
5472 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5473out_wait:
5474 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5475 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5476}
5477
a5d16a4d
TM		 5478static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5479{
5480 struct nfs4_lockdata *data = calldata;
5481
3110ff80 5482 dprintk("%s: begin!\n", __func__);
a5d16a4d 5483
14516c3a
TM		 5484 if (!nfs4_sequence_done(task, &data->res.seq_res))
5485 return;
66179efe 5486
a5d16a4d 5487 data->rpc_status = task->tk_status;
a5d16a4d 5488 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5489 if (data->rpc_status == 0)
5490 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5491 else
5492 goto out;
5493 }
5494 if (data->rpc_status == 0) {
f597c537 5495 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5496 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5497 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5498 }
a5d16a4d 5499out:
3110ff80 5500 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5501}
5502
5503static void nfs4_lock_release(void *calldata)
5504{
5505 struct nfs4_lockdata *data = calldata;
5506
3110ff80 5507 dprintk("%s: begin!\n", __func__);
2f74c0a0 5508 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5509 if (data->cancelled != 0) {
5510 struct rpc_task *task;
5511 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5512 data->arg.lock_seqid);
5513 if (!IS_ERR(task))
bf294b41 5514 rpc_put_task_async(task);
3110ff80 5515 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5516 } else
5517 nfs_free_seqid(data->arg.lock_seqid);
5518 nfs4_put_lock_state(data->lsp);
5519 put_nfs_open_context(data->ctx);
5520 kfree(data);
3110ff80 5521 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5522}
5523
5524static const struct rpc_call_ops nfs4_lock_ops = {
5525 .rpc_call_prepare = nfs4_lock_prepare,
5526 .rpc_call_done = nfs4_lock_done,
5527 .rpc_release = nfs4_lock_release,
5528};
5529
2bee72a6
TM		 5530static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5531{
2bee72a6
TM		 5532 switch (error) {
5533 case -NFS4ERR_ADMIN_REVOKED:
5534 case -NFS4ERR_BAD_STATEID:
ecac799a 5535 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5536 if (new_lock_owner != 0 ||
795a88c9 5537 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5538 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5539 break;
5540 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5541 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5542 case -NFS4ERR_EXPIRED:
5543 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5544 };
5545}
5546
afe6c27c 5547static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5548{
5549 struct nfs4_lockdata *data;
5550 struct rpc_task *task;
5138fde0
TM		 5551 struct rpc_message msg = {
5552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5553 .rpc_cred = state->owner->so_cred,
5554 };
c970aa85
TM		 5555 struct rpc_task_setup task_setup_data = {
5556 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5557 .rpc_message = &msg,
c970aa85 5558 .callback_ops = &nfs4_lock_ops,
101070ca 5559 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5560 .flags = RPC_TASK_ASYNC,
5561 };
a5d16a4d
TM		 5562 int ret;
5563
3110ff80 5564 dprintk("%s: begin!\n", __func__);
cd3758e3 5565 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5566 fl->fl_u.nfs4_fl.owner,
5567 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5568 if (data == NULL)
5569 return -ENOMEM;
5570 if (IS_SETLKW(cmd))
5571 data->arg.block = 1;
a9c92d6b 5572 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5573 msg.rpc_argp = &data->arg;
5574 msg.rpc_resp = &data->res;
c970aa85 5575 task_setup_data.callback_data = data;
8fe72bac
TM		 5576 if (recovery_type > NFS_LOCK_NEW) {
5577 if (recovery_type == NFS_LOCK_RECLAIM)
5578 data->arg.reclaim = NFS_LOCK_RECLAIM;
5579 nfs4_set_sequence_privileged(&data->arg.seq_args);
5580 }
c970aa85 5581 task = rpc_run_task(&task_setup_data);
7a1218a2 5582 if (IS_ERR(task))
a5d16a4d 5583 return PTR_ERR(task);
a5d16a4d
TM		 5584 ret = nfs4_wait_for_completion_rpc_task(task);
5585 if (ret == 0) {
5586 ret = data->rpc_status;
2bee72a6
TM		 5587 if (ret)
5588 nfs4_handle_setlk_error(data->server, data->lsp,
5589 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5590 } else
5591 data->cancelled = 1;
e6b3c4db 5592 rpc_put_task(task);
3110ff80 5593 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5594 return ret;
1da177e4
LT		 5595}
5596
5597static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5598{
202b50dc 5599 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5600 struct nfs4_exception exception = {
5601 .inode = state->inode,
5602 };
202b50dc
TM		 5603 int err;
5604
5605 do {
42a2d13e
TM		 5606 /* Cache the lock if possible... */
5607 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5608 return 0;
afe6c27c 5609 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5610 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5611 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5612 break;
5613 nfs4_handle_exception(server, err, &exception);
5614 } while (exception.retry);
5615 return err;
1da177e4
LT		 5616}
5617
5618static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5619{
202b50dc 5620 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5621 struct nfs4_exception exception = {
5622 .inode = state->inode,
5623 };
202b50dc
TM		 5624 int err;
5625
6bfc93ef
TM		 5626 err = nfs4_set_lock_state(state, request);
5627 if (err != 0)
5628 return err;
f6de7a39 5629 if (!recover_lost_locks) {
ef1820f9
N		 5630 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5631 return 0;
5632 }
202b50dc 5633 do {
42a2d13e
TM		 5634 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5635 return 0;
afe6c27c 5636 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5637 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5638 switch (err) {
5639 default:
5640 goto out;
5641 case -NFS4ERR_GRACE:
5642 case -NFS4ERR_DELAY:
5643 nfs4_handle_exception(server, err, &exception);
5644 err = 0;
5645 }
202b50dc 5646 } while (exception.retry);
a9ed2e25 5647out:
202b50dc 5648 return err;
1da177e4
LT		 5649}
5650
f062eb6c 5651#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5652/**
5653 * nfs41_check_expired_locks - possibly free a lock stateid
5654 *
5655 * @state: NFSv4 state for an inode
5656 *
5657 * Returns NFS_OK if recovery for this stateid is now finished.
5658 * Otherwise a negative NFS4ERR value is returned.
5659 */
b01dd1d8 5660static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5661{
eb64cf96 5662 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5663 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5664 struct nfs_server *server = NFS_SERVER(state->inode);
5665
b01dd1d8 5666 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5667 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5668 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5669
5670 status = nfs41_test_stateid(server,
5671 &lsp->ls_stateid,
5672 cred);
08cb47fa 5673 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5674 if (status != NFS_OK) {
3e60ffdd
CL		 5675 /* Free the stateid unless the server
5676 * informs us the stateid is unrecognized. */
89af2739
CL		 5677 if (status != -NFS4ERR_BAD_STATEID)
5678 nfs41_free_stateid(server,
ab7cb0df
TM		 5679 &lsp->ls_stateid,
5680 cred);
795a88c9 5681 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5682 ret = status;
5683 }
5684 }
5685 };
5686
5687 return ret;
5688}
5689
5690static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5691{
5692 int status = NFS_OK;
5693
5694 if (test_bit(LK_STATE_IN_USE, &state->flags))
5695 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5696 if (status != NFS_OK)
5697 status = nfs4_lock_expired(state, request);
5698 return status;
f062eb6c
BS		 5699}
5700#endif
5701
1da177e4
LT		 5702static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5703{
9a99af49 5704 struct nfs4_state_owner *sp = state->owner;
19e03c57 5705 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5706 unsigned char fl_flags = request->fl_flags;
9a99af49 5707 unsigned int seq;
8e469ebd 5708 int status = -ENOLCK;
1da177e4 5709
8e469ebd
TM		 5710 if ((fl_flags & FL_POSIX) &&
5711 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5712 goto out;
6bfc93ef 5713 /* Is this a delegated open? */
6bfc93ef
TM		 5714 status = nfs4_set_lock_state(state, request);
5715 if (status != 0)
5716 goto out;
01c3b861
TM		 5717 request->fl_flags |= FL_ACCESS;
5718 status = do_vfs_lock(request->fl_file, request);
5719 if (status < 0)
5720 goto out;
19e03c57 5721 down_read(&nfsi->rwsem);
01c3b861 5722 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5723 /* Yes: cache locks! */
01c3b861 5724 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5725 request->fl_flags = fl_flags & ~FL_SLEEP;
5726 status = do_vfs_lock(request->fl_file, request);
5727 goto out_unlock;
01c3b861 5728 }
9a99af49
TM		 5729 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5730 up_read(&nfsi->rwsem);
afe6c27c 5731 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5732 if (status != 0)
9a99af49
TM		 5733 goto out;
5734 down_read(&nfsi->rwsem);
5735 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5736 status = -NFS4ERR_DELAY;
01c3b861 5737 goto out_unlock;
9a99af49 5738 }
6bfc93ef 5739 /* Note: we always want to sleep here! */
01c3b861 5740 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5741 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5742 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5743 "manager!\n", __func__);
01c3b861 5744out_unlock:
19e03c57 5745 up_read(&nfsi->rwsem);
01c3b861
TM		 5746out:
5747 request->fl_flags = fl_flags;
1da177e4
LT		 5748 return status;
5749}
5750
5751static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5752{
a1d0b5ee
TM		 5753 struct nfs4_exception exception = {
5754 .state = state,
05ffe24f 5755 .inode = state->inode,
a1d0b5ee 5756 };
1da177e4
LT		 5757 int err;
5758
5759 do {
965b5d67 5760 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5761 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5762 if (err == -NFS4ERR_DENIED)
5763 err = -EAGAIN;
1da177e4 5764 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5765 err, &exception);
1da177e4
LT		 5766 } while (exception.retry);
5767 return err;
5768}
5769
5770static int
5771nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5772{
5773 struct nfs_open_context *ctx;
5774 struct nfs4_state *state;
5775 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5776 int status;
5777
5778 /* verify open state */
cd3758e3 5779 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5780 state = ctx->state;
5781
5782 if (request->fl_start < 0 || request->fl_end < 0)
5783 return -EINVAL;
5784
d953126a
TM		 5785 if (IS_GETLK(cmd)) {
5786 if (state != NULL)
5787 return nfs4_proc_getlk(state, F_GETLK, request);
5788 return 0;
5789 }
1da177e4
LT		 5790
5791 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5792 return -EINVAL;
5793
d953126a
TM		 5794 if (request->fl_type == F_UNLCK) {
5795 if (state != NULL)
5796 return nfs4_proc_unlck(state, cmd, request);
5797 return 0;
5798 }
1da177e4 5799
d953126a
TM		 5800 if (state == NULL)
5801 return -ENOLCK;
55725513
TM		 5802 /*
5803 * Don't rely on the VFS having checked the file open mode,
5804 * since it won't do this for flock() locks.
5805 */
f44106e2 5806 switch (request->fl_type) {
55725513
TM		 5807 case F_RDLCK:
5808 if (!(filp->f_mode & FMODE_READ))
5809 return -EBADF;
5810 break;
5811 case F_WRLCK:
5812 if (!(filp->f_mode & FMODE_WRITE))
5813 return -EBADF;
5814 }
5815
1da177e4
LT		 5816 do {
5817 status = nfs4_proc_setlk(state, cmd, request);
5818 if ((status != -EAGAIN) || IS_SETLK(cmd))
5819 break;
5820 timeout = nfs4_set_lock_task_retry(timeout);
5821 status = -ERESTARTSYS;
5822 if (signalled())
5823 break;
5824 } while(status < 0);
1da177e4
LT		 5825 return status;
5826}
5827
db4f2e63 5828int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5829{
5830 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5831 int err;
5832
5833 err = nfs4_set_lock_state(state, fl);
5834 if (err != 0)
db4f2e63 5835 return err;
4a706fa0 5836 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5837 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5838}
6b3b5496 5839
cf470c3e
TM		 5840struct nfs_release_lockowner_data {
5841 struct nfs4_lock_state *lsp;
5ae67c4f 5842 struct nfs_server *server;
cf470c3e 5843 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5844 struct nfs4_sequence_args seq_args;
5845 struct nfs4_sequence_res seq_res;
60ea6812 5846 unsigned long timestamp;
cf470c3e
TM		 5847};
5848
fbd4bfd1
CL		 5849static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5850{
5851 struct nfs_release_lockowner_data *data = calldata;
5852 nfs40_setup_sequence(data->server,
5853 &data->seq_args, &data->seq_res, task);
60ea6812 5854 data->timestamp = jiffies;
fbd4bfd1
CL		 5855}
5856
5857static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5858{
5859 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5860 struct nfs_server *server = data->server;
5861
fbd4bfd1 5862 nfs40_sequence_done(task, &data->seq_res);
60ea6812
CL		 5863
5864 switch (task->tk_status) {
5865 case 0:
5866 renew_lease(server, data->timestamp);
5867 break;
5868 case -NFS4ERR_STALE_CLIENTID:
5869 case -NFS4ERR_EXPIRED:
5870 case -NFS4ERR_LEASE_MOVED:
5871 case -NFS4ERR_DELAY:
5872 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5873 rpc_restart_call_prepare(task);
5874 }
fbd4bfd1
CL		 5875}
5876
d3c7b7cc
TM		 5877static void nfs4_release_lockowner_release(void *calldata)
5878{
cf470c3e 5879 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5880 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5881 kfree(calldata);
5882}
5883
17280175 5884static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5885 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5886 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5887 .rpc_release = nfs4_release_lockowner_release,
5888};
5889
c8b2d0bf 5890static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5891{
cf470c3e 5892 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5893 struct rpc_message msg = {
5894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5895 };
5896
5897 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5898 return -EINVAL;
fbd4bfd1 5899
cf470c3e
TM		 5900 data = kmalloc(sizeof(*data), GFP_NOFS);
5901 if (!data)
5902 return -ENOMEM;
fbd4bfd1 5903 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5904 data->lsp = lsp;
5ae67c4f 5905 data->server = server;
cf470c3e
TM		 5906 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5907 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5908 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5909
cf470c3e
TM		 5910 msg.rpc_argp = &data->args;
5911 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5912 return 0;
d3c7b7cc
TM		 5913}
5914
aa1870af
BF		 5915#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5916
64c2ce8b
AK		 5917static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5918 const void *buf, size_t buflen,
5919 int flags, int type)
6b3b5496 5920{
64c2ce8b
AK		 5921 if (strcmp(key, "") != 0)
5922 return -EINVAL;
4b580ee3 5923
64c2ce8b 5924 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5925}
5926
64c2ce8b
AK		 5927static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5928 void *buf, size_t buflen, int type)
6b3b5496 5929{
64c2ce8b
AK		 5930 if (strcmp(key, "") != 0)
5931 return -EINVAL;
aa1870af 5932
64c2ce8b 5933 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5934}
5935
64c2ce8b
AK		 5936static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5937 size_t list_len, const char *name,
5938 size_t name_len, int type)
6b3b5496 5939{
64c2ce8b 5940 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5941
096455a2
BF		 5942 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5943 return 0;
64c2ce8b
AK		 5944
5945 if (list && len <= list_len)
5946 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5947 return len;
6b3b5496
BF		 5948}
5949
c9bccef6
DQ		 5950#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5951static inline int nfs4_server_supports_labels(struct nfs_server *server)
5952{
5953 return server->caps & NFS_CAP_SECURITY_LABEL;
5954}
5955
5956static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5957 const void *buf, size_t buflen,
5958 int flags, int type)
5959{
5960 if (security_ismaclabel(key))
5961 return nfs4_set_security_label(dentry, buf, buflen);
5962
5963 return -EOPNOTSUPP;
5964}
5965
5966static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5967 void *buf, size_t buflen, int type)
5968{
5969 if (security_ismaclabel(key))
5970 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5971 return -EOPNOTSUPP;
5972}
5973
5974static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5975 size_t list_len, const char *name,
5976 size_t name_len, int type)
5977{
5978 size_t len = 0;
5979
5980 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5981 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5982 if (list && len <= list_len)
5983 security_inode_listsecurity(dentry->d_inode, list, len);
5984 }
5985 return len;
5986}
5987
5988static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5989 .prefix = XATTR_SECURITY_PREFIX,
5990 .list = nfs4_xattr_list_nfs4_label,
5991 .get = nfs4_xattr_get_nfs4_label,
5992 .set = nfs4_xattr_set_nfs4_label,
5993};
5994#endif
5995
5996
533eb461
AA		 5997/*
5998 * nfs_fhget will use either the mounted_on_fileid or the fileid
5999 */
69aaaae1
TM		 6000static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6001{
533eb461
AA		 6002 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6003 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6004 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6005 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6006 return;
6007
6008 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6009 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6010 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6011 fattr->nlink = 2;
6012}
6013
f05d147f
BS		 6014static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6015 const struct qstr *name,
6016 struct nfs4_fs_locations *fs_locations,
6017 struct page *page)
683b57b4
TM		 6018{
6019 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6020 u32 bitmask[3] = {
361e624f 6021 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6022 };
6023 struct nfs4_fs_locations_arg args = {
6024 .dir_fh = NFS_FH(dir),
c228fd3a 6025 .name = name,
683b57b4
TM		 6026 .page = page,
6027 .bitmask = bitmask,
6028 };
22958463
BH		 6029 struct nfs4_fs_locations_res res = {
6030 .fs_locations = fs_locations,
6031 };
683b57b4
TM		 6032 struct rpc_message msg = {
6033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6034 .rpc_argp = &args,
22958463 6035 .rpc_resp = &res,
683b57b4
TM		 6036 };
6037 int status;
6038
3110ff80 6039 dprintk("%s: start\n", __func__);
533eb461
AA		 6040
6041 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6042 * is not supported */
6043 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6044 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6045 else
6046 bitmask[0] |= FATTR4_WORD0_FILEID;
6047
c228fd3a 6048 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6049 fs_locations->server = server;
830b8e33 6050 fs_locations->nlocations = 0;
f05d147f 6051 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6052 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6053 return status;
6054}
6055
f05d147f
BS		 6056int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6057 const struct qstr *name,
6058 struct nfs4_fs_locations *fs_locations,
6059 struct page *page)
db0a9593
BS		 6060{
6061 struct nfs4_exception exception = { };
6062 int err;
6063 do {
078ea3df
TM		 6064 err = _nfs4_proc_fs_locations(client, dir, name,
6065 fs_locations, page);
6066 trace_nfs4_get_fs_locations(dir, name, err);
6067 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6068 &exception);
6069 } while (exception.retry);
6070 return err;
6071}
6072
b03d735b
CL		 6073/*
6074 * This operation also signals the server that this client is
6075 * performing migration recovery. The server can stop returning
6076 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6077 * appended to this compound to identify the client ID which is
6078 * performing recovery.
6079 */
6080static int _nfs40_proc_get_locations(struct inode *inode,
6081 struct nfs4_fs_locations *locations,
6082 struct page *page, struct rpc_cred *cred)
6083{
6084 struct nfs_server *server = NFS_SERVER(inode);
6085 struct rpc_clnt *clnt = server->client;
6086 u32 bitmask[2] = {
6087 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6088 };
6089 struct nfs4_fs_locations_arg args = {
6090 .clientid = server->nfs_client->cl_clientid,
6091 .fh = NFS_FH(inode),
6092 .page = page,
6093 .bitmask = bitmask,
6094 .migration = 1, /* skip LOOKUP */
6095 .renew = 1, /* append RENEW */
6096 };
6097 struct nfs4_fs_locations_res res = {
6098 .fs_locations = locations,
6099 .migration = 1,
6100 .renew = 1,
6101 };
6102 struct rpc_message msg = {
6103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6104 .rpc_argp = &args,
6105 .rpc_resp = &res,
6106 .rpc_cred = cred,
6107 };
6108 unsigned long now = jiffies;
6109 int status;
6110
6111 nfs_fattr_init(&locations->fattr);
6112 locations->server = server;
6113 locations->nlocations = 0;
6114
6115 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6116 nfs4_set_sequence_privileged(&args.seq_args);
6117 status = nfs4_call_sync_sequence(clnt, server, &msg,
6118 &args.seq_args, &res.seq_res);
6119 if (status)
6120 return status;
6121
6122 renew_lease(server, now);
6123 return 0;
6124}
6125
6126#ifdef CONFIG_NFS_V4_1
6127
6128/*
6129 * This operation also signals the server that this client is
6130 * performing migration recovery. The server can stop asserting
6131 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6132 * performing this operation is identified in the SEQUENCE
6133 * operation in this compound.
6134 *
6135 * When the client supports GETATTR(fs_locations_info), it can
6136 * be plumbed in here.
6137 */
6138static int _nfs41_proc_get_locations(struct inode *inode,
6139 struct nfs4_fs_locations *locations,
6140 struct page *page, struct rpc_cred *cred)
6141{
6142 struct nfs_server *server = NFS_SERVER(inode);
6143 struct rpc_clnt *clnt = server->client;
6144 u32 bitmask[2] = {
6145 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6146 };
6147 struct nfs4_fs_locations_arg args = {
6148 .fh = NFS_FH(inode),
6149 .page = page,
6150 .bitmask = bitmask,
6151 .migration = 1, /* skip LOOKUP */
6152 };
6153 struct nfs4_fs_locations_res res = {
6154 .fs_locations = locations,
6155 .migration = 1,
6156 };
6157 struct rpc_message msg = {
6158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6159 .rpc_argp = &args,
6160 .rpc_resp = &res,
6161 .rpc_cred = cred,
6162 };
6163 int status;
6164
6165 nfs_fattr_init(&locations->fattr);
6166 locations->server = server;
6167 locations->nlocations = 0;
6168
6169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6170 nfs4_set_sequence_privileged(&args.seq_args);
6171 status = nfs4_call_sync_sequence(clnt, server, &msg,
6172 &args.seq_args, &res.seq_res);
6173 if (status == NFS4_OK &&
6174 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6175 status = -NFS4ERR_LEASE_MOVED;
6176 return status;
6177}
6178
6179#endif /* CONFIG_NFS_V4_1 */
6180
6181/**
6182 * nfs4_proc_get_locations - discover locations for a migrated FSID
6183 * @inode: inode on FSID that is migrating
6184 * @locations: result of query
6185 * @page: buffer
6186 * @cred: credential to use for this operation
6187 *
6188 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6189 * operation failed, or a negative errno if a local error occurred.
6190 *
6191 * On success, "locations" is filled in, but if the server has
6192 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6193 * asserted.
6194 *
6195 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6196 * from this client that require migration recovery.
6197 */
6198int nfs4_proc_get_locations(struct inode *inode,
6199 struct nfs4_fs_locations *locations,
6200 struct page *page, struct rpc_cred *cred)
6201{
6202 struct nfs_server *server = NFS_SERVER(inode);
6203 struct nfs_client *clp = server->nfs_client;
6204 const struct nfs4_mig_recovery_ops *ops =
6205 clp->cl_mvops->mig_recovery_ops;
6206 struct nfs4_exception exception = { };
6207 int status;
6208
6209 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6210 (unsigned long long)server->fsid.major,
6211 (unsigned long long)server->fsid.minor,
6212 clp->cl_hostname);
6213 nfs_display_fhandle(NFS_FH(inode), __func__);
6214
6215 do {
6216 status = ops->get_locations(inode, locations, page, cred);
6217 if (status != -NFS4ERR_DELAY)
6218 break;
6219 nfs4_handle_exception(server, status, &exception);
6220 } while (exception.retry);
6221 return status;
6222}
6223
44c99933
CL		 6224/*
6225 * This operation also signals the server that this client is
6226 * performing "lease moved" recovery. The server can stop
6227 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6228 * is appended to this compound to identify the client ID which is
6229 * performing recovery.
6230 */
6231static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6232{
6233 struct nfs_server *server = NFS_SERVER(inode);
6234 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6235 struct rpc_clnt *clnt = server->client;
6236 struct nfs4_fsid_present_arg args = {
6237 .fh = NFS_FH(inode),
6238 .clientid = clp->cl_clientid,
6239 .renew = 1, /* append RENEW */
6240 };
6241 struct nfs4_fsid_present_res res = {
6242 .renew = 1,
6243 };
6244 struct rpc_message msg = {
6245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6246 .rpc_argp = &args,
6247 .rpc_resp = &res,
6248 .rpc_cred = cred,
6249 };
6250 unsigned long now = jiffies;
6251 int status;
6252
6253 res.fh = nfs_alloc_fhandle();
6254 if (res.fh == NULL)
6255 return -ENOMEM;
6256
6257 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6258 nfs4_set_sequence_privileged(&args.seq_args);
6259 status = nfs4_call_sync_sequence(clnt, server, &msg,
6260 &args.seq_args, &res.seq_res);
6261 nfs_free_fhandle(res.fh);
6262 if (status)
6263 return status;
6264
6265 do_renew_lease(clp, now);
6266 return 0;
6267}
6268
6269#ifdef CONFIG_NFS_V4_1
6270
6271/*
6272 * This operation also signals the server that this client is
6273 * performing "lease moved" recovery. The server can stop asserting
6274 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6275 * this operation is identified in the SEQUENCE operation in this
6276 * compound.
6277 */
6278static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6279{
6280 struct nfs_server *server = NFS_SERVER(inode);
6281 struct rpc_clnt *clnt = server->client;
6282 struct nfs4_fsid_present_arg args = {
6283 .fh = NFS_FH(inode),
6284 };
6285 struct nfs4_fsid_present_res res = {
6286 };
6287 struct rpc_message msg = {
6288 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6289 .rpc_argp = &args,
6290 .rpc_resp = &res,
6291 .rpc_cred = cred,
6292 };
6293 int status;
6294
6295 res.fh = nfs_alloc_fhandle();
6296 if (res.fh == NULL)
6297 return -ENOMEM;
6298
6299 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6300 nfs4_set_sequence_privileged(&args.seq_args);
6301 status = nfs4_call_sync_sequence(clnt, server, &msg,
6302 &args.seq_args, &res.seq_res);
6303 nfs_free_fhandle(res.fh);
6304 if (status == NFS4_OK &&
6305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6306 status = -NFS4ERR_LEASE_MOVED;
6307 return status;
6308}
6309
6310#endif /* CONFIG_NFS_V4_1 */
6311
6312/**
6313 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6314 * @inode: inode on FSID to check
6315 * @cred: credential to use for this operation
6316 *
6317 * Server indicates whether the FSID is present, moved, or not
6318 * recognized. This operation is necessary to clear a LEASE_MOVED
6319 * condition for this client ID.
6320 *
6321 * Returns NFS4_OK if the FSID is present on this server,
6322 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6323 * NFS4ERR code if some error occurred on the server, or a
6324 * negative errno if a local failure occurred.
6325 */
6326int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6327{
6328 struct nfs_server *server = NFS_SERVER(inode);
6329 struct nfs_client *clp = server->nfs_client;
6330 const struct nfs4_mig_recovery_ops *ops =
6331 clp->cl_mvops->mig_recovery_ops;
6332 struct nfs4_exception exception = { };
6333 int status;
6334
6335 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6336 (unsigned long long)server->fsid.major,
6337 (unsigned long long)server->fsid.minor,
6338 clp->cl_hostname);
6339 nfs_display_fhandle(NFS_FH(inode), __func__);
6340
6341 do {
6342 status = ops->fsid_present(inode, cred);
6343 if (status != -NFS4ERR_DELAY)
6344 break;
6345 nfs4_handle_exception(server, status, &exception);
6346 } while (exception.retry);
6347 return status;
6348}
6349
5ec16a85 6350/**
a5250def
WAA		 6351 * If 'use_integrity' is true and the state managment nfs_client
6352 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6353 * and the machine credential as per RFC3530bis and RFC5661 Security
6354 * Considerations sections. Otherwise, just use the user cred with the
6355 * filesystem's rpc_client.
5ec16a85 6356 */
a5250def 6357static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6358{
6359 int status;
6360 struct nfs4_secinfo_arg args = {
6361 .dir_fh = NFS_FH(dir),
6362 .name = name,
6363 };
6364 struct nfs4_secinfo_res res = {
6365 .flavors = flavors,
6366 };
6367 struct rpc_message msg = {
6368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6369 .rpc_argp = &args,
6370 .rpc_resp = &res,
6371 };
a5250def 6372 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6373 struct rpc_cred *cred = NULL;
a5250def
WAA		 6374
6375 if (use_integrity) {
6376 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6377 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6378 msg.rpc_cred = cred;
a5250def 6379 }
5a5ea0d4
BS		 6380
6381 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6382
6383 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6384 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6385
a5250def
WAA		 6386 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6387 &res.seq_res, 0);
5a5ea0d4 6388 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6389
7cb852df
WAA		 6390 if (cred)
6391 put_rpccred(cred);
a5250def 6392
5a5ea0d4
BS		 6393 return status;
6394}
6395
72de53ec
BS		 6396int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6397 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6398{
6399 struct nfs4_exception exception = { };
6400 int err;
6401 do {
a5250def
WAA		 6402 err = -NFS4ERR_WRONGSEC;
6403
6404 /* try to use integrity protection with machine cred */
6405 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6406 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6407
6408 /*
6409 * if unable to use integrity protection, or SECINFO with
6410 * integrity protection returns NFS4ERR_WRONGSEC (which is
6411 * disallowed by spec, but exists in deployed servers) use
6412 * the current filesystem's rpc_client and the user cred.
6413 */
6414 if (err == -NFS4ERR_WRONGSEC)
6415 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6416
078ea3df
TM		 6417 trace_nfs4_secinfo(dir, name, err);
6418 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6419 &exception);
6420 } while (exception.retry);
6421 return err;
6422}
6423
557134a3 6424#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6425/*
6426 * Check the exchange flags returned by the server for invalid flags, having
6427 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6428 * DS flags set.
6429 */
6430static int nfs4_check_cl_exchange_flags(u32 flags)
6431{
6432 if (flags & ~EXCHGID4_FLAG_MASK_R)
6433 goto out_inval;
6434 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6435 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6436 goto out_inval;
6437 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6438 goto out_inval;
6439 return NFS_OK;
6440out_inval:
6441 return -NFS4ERR_INVAL;
6442}
6443
78fe0f41 6444static bool
79d4e1f0
CL		 6445nfs41_same_server_scope(struct nfs41_server_scope *a,
6446 struct nfs41_server_scope *b)
78fe0f41
WAA		 6447{
6448 if (a->server_scope_sz == b->server_scope_sz &&
6449 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6450 return true;
6451
6452 return false;
6453}
6454
7c44f1ae
WAA		 6455/*
6456 * nfs4_proc_bind_conn_to_session()
6457 *
6458 * The 4.1 client currently uses the same TCP connection for the
6459 * fore and backchannel.
6460 */
2cf047c9 6461int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6462{
6463 int status;
6464 struct nfs41_bind_conn_to_session_res res;
6465 struct rpc_message msg = {
6466 .rpc_proc =
6467 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6468 .rpc_argp = clp,
6469 .rpc_resp = &res,
2cf047c9 6470 .rpc_cred = cred,
7c44f1ae
WAA		 6471 };
6472
6473 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6474
6475 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6476 if (unlikely(res.session == NULL)) {
6477 status = -ENOMEM;
6478 goto out;
6479 }
6480
6481 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6482 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6483 if (status == 0) {
6484 if (memcmp(res.session->sess_id.data,
6485 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6486 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6487 status = -EIO;
6488 goto out_session;
6489 }
6490 if (res.dir != NFS4_CDFS4_BOTH) {
6491 dprintk("NFS: %s: Unexpected direction from server\n",
6492 __func__);
6493 status = -EIO;
6494 goto out_session;
6495 }
6496 if (res.use_conn_in_rdma_mode) {
6497 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6498 __func__);
6499 status = -EIO;
6500 goto out_session;
6501 }
6502 }
6503out_session:
6504 kfree(res.session);
6505out:
6506 dprintk("<-- %s status= %d\n", __func__, status);
6507 return status;
6508}
6509
99fe60d0 6510/*
fa940720
WAA		 6511 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6512 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6513 */
6514static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6515 .how = SP4_MACH_CRED,
6516 .enforce.u.words = {
6517 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6518 1 << (OP_EXCHANGE_ID - 32) |
6519 1 << (OP_CREATE_SESSION - 32) |
6520 1 << (OP_DESTROY_SESSION - 32) |
6521 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6522 },
6523 .allow.u.words = {
6524 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6525 1 << (OP_LOCKU) |
6526 1 << (OP_COMMIT),
8b5bee2e 6527 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6528 1 << (OP_SECINFO_NO_NAME - 32) |
6529 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6530 1 << (OP_FREE_STATEID - 32) |
6531 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6532 }
6533};
6534
6535/*
6536 * Select the state protection mode for client `clp' given the server results
6537 * from exchange_id in `sp'.
99fe60d0 6538 *
2031cd1a
WAA		 6539 * Returns 0 on success, negative errno otherwise.
6540 */
6541static int nfs4_sp4_select_mode(struct nfs_client *clp,
6542 struct nfs41_state_protection *sp)
6543{
6544 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6545 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6546 1 << (OP_EXCHANGE_ID - 32) |
6547 1 << (OP_CREATE_SESSION - 32) |
6548 1 << (OP_DESTROY_SESSION - 32) |
6549 1 << (OP_DESTROY_CLIENTID - 32)
6550 };
6551 unsigned int i;
6552
6553 if (sp->how == SP4_MACH_CRED) {
6554 /* Print state protect result */
6555 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6556 for (i = 0; i <= LAST_NFS4_OP; i++) {
6557 if (test_bit(i, sp->enforce.u.longs))
6558 dfprintk(MOUNT, " enforce op %d\n", i);
6559 if (test_bit(i, sp->allow.u.longs))
6560 dfprintk(MOUNT, " allow op %d\n", i);
6561 }
6562
6563 /* make sure nothing is on enforce list that isn't supported */
6564 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6565 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6566 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6567 return -EINVAL;
6568 }
6569 }
6570
6571 /*
6572 * Minimal mode - state operations are allowed to use machine
6573 * credential. Note this already happens by default, so the
6574 * client doesn't have to do anything more than the negotiation.
6575 *
6576 * NOTE: we don't care if EXCHANGE_ID is in the list -
6577 * we're already using the machine cred for exchange_id
6578 * and will never use a different cred.
6579 */
6580 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6581 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6582 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6583 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6584 dfprintk(MOUNT, "sp4_mach_cred:\n");
6585 dfprintk(MOUNT, " minimal mode enabled\n");
6586 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6587 } else {
6588 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6589 return -EINVAL;
6590 }
fa940720
WAA		 6591
6592 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6593 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6594 dfprintk(MOUNT, " cleanup mode enabled\n");
6595 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6596 }
8b5bee2e
WAA		 6597
6598 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6599 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6600 dfprintk(MOUNT, " secinfo mode enabled\n");
6601 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6602 }
3787d506
WAA		 6603
6604 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6605 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6606 dfprintk(MOUNT, " stateid mode enabled\n");
6607 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6608 }
8c21c62c
WAA		 6609
6610 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6611 dfprintk(MOUNT, " write mode enabled\n");
6612 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6613 }
6614
6615 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6616 dfprintk(MOUNT, " commit mode enabled\n");
6617 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6618 }
2031cd1a
WAA		 6619 }
6620
6621 return 0;
6622}
6623
6624/*
6625 * _nfs4_proc_exchange_id()
6bbb4ae8 6626 *
2031cd1a 6627 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6628 */
2031cd1a
WAA		 6629static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6630 u32 sp4_how)
99fe60d0
BH		 6631{
6632 nfs4_verifier verifier;
6633 struct nfs41_exchange_id_args args = {
cd93710e 6634 .verifier = &verifier,
99fe60d0 6635 .client = clp,
cd3fadec 6636#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6637 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6638 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6639 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6640#else
6641 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6642 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6643#endif
99fe60d0
BH		 6644 };
6645 struct nfs41_exchange_id_res res = {
32b01310 6646 0
99fe60d0
BH		 6647 };
6648 int status;
6649 struct rpc_message msg = {
6650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6651 .rpc_argp = &args,
6652 .rpc_resp = &res,
6653 .rpc_cred = cred,
6654 };
99fe60d0 6655
f092075d 6656 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6657 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6658 sizeof(args.id));
6bbb4ae8
CL		 6659 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6660 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6661 args.id_len, args.id);
99fe60d0 6662
acdeb69d 6663 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6664 GFP_NOFS);
acdeb69d 6665 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6666 status = -ENOMEM;
6667 goto out;
6668 }
78fe0f41 6669
79d4e1f0 6670 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6671 GFP_NOFS);
177313f1 6672 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6673 status = -ENOMEM;
acdeb69d 6674 goto out_server_owner;
abe9a6d5 6675 }
78fe0f41 6676
bbafffd2 6677 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6678 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6679 status = -ENOMEM;
6680 goto out_server_scope;
6681 }
6682
2031cd1a
WAA		 6683 switch (sp4_how) {
6684 case SP4_NONE:
6685 args.state_protect.how = SP4_NONE;
6686 break;
6687
6688 case SP4_MACH_CRED:
6689 args.state_protect = nfs4_sp4_mach_cred_request;
6690 break;
6691
6692 default:
6693 /* unsupported! */
6694 WARN_ON_ONCE(1);
6695 status = -EINVAL;
6696 goto out_server_scope;
6697 }
6698
1bd714f2 6699 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6700 trace_nfs4_exchange_id(clp, status);
177313f1 6701 if (status == 0)
32b01310 6702 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6703
2031cd1a
WAA		 6704 if (status == 0)
6705 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6706
acdeb69d 6707 if (status == 0) {
32b01310
TM		 6708 clp->cl_clientid = res.clientid;
6709 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6710 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6711 clp->cl_seqid = res.seqid;
6712
acdeb69d
CL		 6713 kfree(clp->cl_serverowner);
6714 clp->cl_serverowner = res.server_owner;
6715 res.server_owner = NULL;
78fe0f41 6716
7d2ed9ac 6717 /* use the most recent implementation id */
59155546
CL		 6718 kfree(clp->cl_implid);
6719 clp->cl_implid = res.impl_id;
7d2ed9ac 6720
177313f1 6721 if (clp->cl_serverscope != NULL &&
79d4e1f0 6722 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6723 res.server_scope)) {
6724 dprintk("%s: server_scope mismatch detected\n",
6725 __func__);
6726 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6727 kfree(clp->cl_serverscope);
6728 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6729 }
6730
177313f1 6731 if (clp->cl_serverscope == NULL) {
79d4e1f0 6732 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6733 goto out;
6734 }
32b01310
TM		 6735 } else
6736 kfree(res.impl_id);
7d2ed9ac 6737
acdeb69d
CL		 6738out_server_owner:
6739 kfree(res.server_owner);
7d2ed9ac 6740out_server_scope:
abe9a6d5
WAA		 6741 kfree(res.server_scope);
6742out:
177313f1 6743 if (clp->cl_implid != NULL)
6bbb4ae8 6744 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6745 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6746 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6747 clp->cl_implid->date.seconds,
6748 clp->cl_implid->date.nseconds);
6bbb4ae8 6749 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6750 return status;
6751}
6752
2031cd1a
WAA		 6753/*
6754 * nfs4_proc_exchange_id()
6755 *
6756 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6757 *
6758 * Since the clientid has expired, all compounds using sessions
6759 * associated with the stale clientid will be returning
6760 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6761 * be in some phase of session reset.
6762 *
6763 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6764 */
6765int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6766{
6767 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6768 int status;
6769
6770 /* try SP4_MACH_CRED if krb5i/p */
6771 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6772 authflavor == RPC_AUTH_GSS_KRB5P) {
6773 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6774 if (!status)
6775 return 0;
6776 }
6777
6778 /* try SP4_NONE */
6779 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6780}
6781
66245539
TM		 6782static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6783 struct rpc_cred *cred)
6784{
6785 struct rpc_message msg = {
6786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6787 .rpc_argp = clp,
6788 .rpc_cred = cred,
6789 };
6790 int status;
6791
6792 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6793 trace_nfs4_destroy_clientid(clp, status);
66245539 6794 if (status)
02c67525 6795 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6796 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6797 return status;
6798}
6799
6800static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6801 struct rpc_cred *cred)
6802{
6803 unsigned int loop;
6804 int ret;
6805
6806 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6807 ret = _nfs4_proc_destroy_clientid(clp, cred);
6808 switch (ret) {
6809 case -NFS4ERR_DELAY:
6810 case -NFS4ERR_CLIENTID_BUSY:
6811 ssleep(1);
6812 break;
6813 default:
6814 return ret;
6815 }
6816 }
6817 return 0;
6818}
6819
6820int nfs4_destroy_clientid(struct nfs_client *clp)
6821{
6822 struct rpc_cred *cred;
6823 int ret = 0;
6824
6825 if (clp->cl_mvops->minor_version < 1)
6826 goto out;
6827 if (clp->cl_exchange_flags == 0)
6828 goto out;
05f4c350
CL		 6829 if (clp->cl_preserve_clid)
6830 goto out;
73d8bde5 6831 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6832 ret = nfs4_proc_destroy_clientid(clp, cred);
6833 if (cred)
6834 put_rpccred(cred);
6835 switch (ret) {
6836 case 0:
6837 case -NFS4ERR_STALE_CLIENTID:
6838 clp->cl_exchange_flags = 0;
6839 }
6840out:
6841 return ret;
6842}
6843
2050f0cc
AA		 6844struct nfs4_get_lease_time_data {
6845 struct nfs4_get_lease_time_args *args;
6846 struct nfs4_get_lease_time_res *res;
6847 struct nfs_client *clp;
6848};
6849
6850static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6851 void *calldata)
6852{
2050f0cc
AA		 6853 struct nfs4_get_lease_time_data *data =
6854 (struct nfs4_get_lease_time_data *)calldata;
6855
6856 dprintk("--> %s\n", __func__);
6857 /* just setup sequence, do not trigger session recovery
6858 since we're invoked within one */
d9afbd1b
TM		 6859 nfs41_setup_sequence(data->clp->cl_session,
6860 &data->args->la_seq_args,
6861 &data->res->lr_seq_res,
6862 task);
2050f0cc
AA		 6863 dprintk("<-- %s\n", __func__);
6864}
6865
6866/*
6867 * Called from nfs4_state_manager thread for session setup, so don't recover
6868 * from sequence operation or clientid errors.
6869 */
6870static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6871{
6872 struct nfs4_get_lease_time_data *data =
6873 (struct nfs4_get_lease_time_data *)calldata;
6874
6875 dprintk("--> %s\n", __func__);
14516c3a
TM		 6876 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6877 return;
2050f0cc
AA		 6878 switch (task->tk_status) {
6879 case -NFS4ERR_DELAY:
6880 case -NFS4ERR_GRACE:
6881 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6882 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6883 task->tk_status = 0;
a8a4ae3a
AA		 6884 /* fall through */
6885 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6886 rpc_restart_call_prepare(task);
2050f0cc
AA		 6887 return;
6888 }
2050f0cc
AA		 6889 dprintk("<-- %s\n", __func__);
6890}
6891
17280175 6892static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6893 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6894 .rpc_call_done = nfs4_get_lease_time_done,
6895};
6896
6897int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6898{
6899 struct rpc_task *task;
6900 struct nfs4_get_lease_time_args args;
6901 struct nfs4_get_lease_time_res res = {
6902 .lr_fsinfo = fsinfo,
6903 };
6904 struct nfs4_get_lease_time_data data = {
6905 .args = &args,
6906 .res = &res,
6907 .clp = clp,
6908 };
6909 struct rpc_message msg = {
6910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6911 .rpc_argp = &args,
6912 .rpc_resp = &res,
6913 };
6914 struct rpc_task_setup task_setup = {
6915 .rpc_client = clp->cl_rpcclient,
6916 .rpc_message = &msg,
6917 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6918 .callback_data = &data,
6919 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6920 };
6921 int status;
6922
a9c92d6b 6923 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6924 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6925 dprintk("--> %s\n", __func__);
6926 task = rpc_run_task(&task_setup);
6927
6928 if (IS_ERR(task))
6929 status = PTR_ERR(task);
6930 else {
6931 status = task->tk_status;
6932 rpc_put_task(task);
6933 }
6934 dprintk("<-- %s return %d\n", __func__, status);
6935
6936 return status;
6937}
6938
fc931582
AA		 6939/*
6940 * Initialize the values to be used by the client in CREATE_SESSION
6941 * If nfs4_init_session set the fore channel request and response sizes,
6942 * use them.
6943 *
6944 * Set the back channel max_resp_sz_cached to zero to force the client to
6945 * always set csa_cachethis to FALSE because the current implementation
6946 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6947 */
6948static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6949{
18aad3d5
AA		 6950 unsigned int max_rqst_sz, max_resp_sz;
6951
6952 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6953 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6954
fc931582 6955 /* Fore channel attributes */
18aad3d5
AA		 6956 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6957 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6958 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6959 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6960
6961 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6962 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6963 __func__,
6964 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6965 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6966
6967 /* Back channel attributes */
fc931582
AA		 6968 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6969 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6970 args->bc_attrs.max_resp_sz_cached = 0;
6971 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6972 args->bc_attrs.max_reqs = 1;
6973
6974 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6975 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6976 __func__,
6977 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6978 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6979 args->bc_attrs.max_reqs);
6980}
6981
43c2e885 6982static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6983{
43c2e885
BF		 6984 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6985 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6986
43c2e885
BF		 6987 if (rcvd->max_resp_sz > sent->max_resp_sz)
6988 return -EINVAL;
6989 /*
6990 * Our requested max_ops is the minimum we need; we're not
6991 * prepared to break up compounds into smaller pieces than that.
6992 * So, no point even trying to continue if the server won't
6993 * cooperate:
6994 */
6995 if (rcvd->max_ops < sent->max_ops)
6996 return -EINVAL;
6997 if (rcvd->max_reqs == 0)
6998 return -EINVAL;
b4b9a0c1
VG		 6999 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7000 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7001 return 0;
8d35301d
AA		 7002}
7003
43c2e885
BF		 7004static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7005{
7006 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7007 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7008
43c2e885
BF		 7009 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7010 return -EINVAL;
7011 if (rcvd->max_resp_sz < sent->max_resp_sz)
7012 return -EINVAL;
7013 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7014 return -EINVAL;
7015 /* These would render the backchannel useless: */
b4b9a0c1 7016 if (rcvd->max_ops != sent->max_ops)
43c2e885 7017 return -EINVAL;
b4b9a0c1 7018 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7019 return -EINVAL;
7020 return 0;
7021}
8d35301d 7022
8d35301d
AA		 7023static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7024 struct nfs4_session *session)
7025{
43c2e885 7026 int ret;
8d35301d 7027
43c2e885
BF		 7028 ret = nfs4_verify_fore_channel_attrs(args, session);
7029 if (ret)
7030 return ret;
7031 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7032}
7033
848f5bda
TM		 7034static int _nfs4_proc_create_session(struct nfs_client *clp,
7035 struct rpc_cred *cred)
fc931582
AA		 7036{
7037 struct nfs4_session *session = clp->cl_session;
7038 struct nfs41_create_session_args args = {
7039 .client = clp,
7040 .cb_program = NFS4_CALLBACK,
7041 };
7042 struct nfs41_create_session_res res = {
7043 .client = clp,
7044 };
7045 struct rpc_message msg = {
7046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7047 .rpc_argp = &args,
7048 .rpc_resp = &res,
848f5bda 7049 .rpc_cred = cred,
fc931582
AA		 7050 };
7051 int status;
7052
7053 nfs4_init_channel_attrs(&args);
0f91421e 7054 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7055
1bd714f2 7056 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7057 trace_nfs4_create_session(clp, status);
fc931582 7058
43095d39 7059 if (!status) {
8d35301d
AA		 7060 /* Verify the session's negotiated channel_attrs values */
7061 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7062 /* Increment the clientid slot sequence id */
7063 clp->cl_seqid++;
7064 }
7065
7066 return status;
7067}
7068
7069/*
7070 * Issues a CREATE_SESSION operation to the server.
7071 * It is the responsibility of the caller to verify the session is
7072 * expired before calling this routine.
7073 */
848f5bda 7074int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7075{
7076 int status;
7077 unsigned *ptr;
fc931582
AA		 7078 struct nfs4_session *session = clp->cl_session;
7079
7080 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7081
848f5bda 7082 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7083 if (status)
7084 goto out;
7085
aacd5537
AA		 7086 /* Init or reset the session slot tables */
7087 status = nfs4_setup_session_slot_tables(session);
7088 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7089 if (status)
7090 goto out;
7091
7092 ptr = (unsigned *)&session->sess_id.data[0];
7093 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7094 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7095out:
7096 dprintk("<-- %s\n", __func__);
7097 return status;
7098}
7099
0f3e66c6
AA		 7100/*
7101 * Issue the over-the-wire RPC DESTROY_SESSION.
7102 * The caller must serialize access to this routine.
7103 */
848f5bda
TM		 7104int nfs4_proc_destroy_session(struct nfs4_session *session,
7105 struct rpc_cred *cred)
0f3e66c6 7106{
848f5bda
TM		 7107 struct rpc_message msg = {
7108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7109 .rpc_argp = session,
7110 .rpc_cred = cred,
7111 };
0f3e66c6 7112 int status = 0;
0f3e66c6
AA		 7113
7114 dprintk("--> nfs4_proc_destroy_session\n");
7115
7116 /* session is still being setup */
7117 if (session->clp->cl_cons_state != NFS_CS_READY)
7118 return status;
7119
1bd714f2 7120 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7121 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7122
7123 if (status)
08106ac7 7124 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7125 "Session has been destroyed regardless...\n", status);
7126
7127 dprintk("<-- nfs4_proc_destroy_session\n");
7128 return status;
7129}
7130
fc01cea9
AA		 7131/*
7132 * Renew the cl_session lease.
7133 */
d5f8d3fe
TM		 7134struct nfs4_sequence_data {
7135 struct nfs_client *clp;
7136 struct nfs4_sequence_args args;
7137 struct nfs4_sequence_res res;
7138};
7139
dc96aef9
AB		 7140static void nfs41_sequence_release(void *data)
7141{
d5f8d3fe
TM		 7142 struct nfs4_sequence_data *calldata = data;
7143 struct nfs_client *clp = calldata->clp;
dc96aef9 7144
7135840f
AB		 7145 if (atomic_read(&clp->cl_count) > 1)
7146 nfs4_schedule_state_renewal(clp);
7147 nfs_put_client(clp);
d5f8d3fe 7148 kfree(calldata);
dc96aef9
AB		 7149}
7150
aa5190d0
TM		 7151static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7152{
7153 switch(task->tk_status) {
7154 case -NFS4ERR_DELAY:
aa5190d0
TM		 7155 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7156 return -EAGAIN;
7157 default:
0400a6b0 7158 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7159 }
7160 return 0;
7161}
7162
dc96aef9 7163static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7164{
d5f8d3fe
TM		 7165 struct nfs4_sequence_data *calldata = data;
7166 struct nfs_client *clp = calldata->clp;
fc01cea9 7167
14516c3a
TM		 7168 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7169 return;
fc01cea9 7170
c6d01c6f 7171 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7172 if (task->tk_status < 0) {
7173 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7174 if (atomic_read(&clp->cl_count) == 1)
7175 goto out;
fc01cea9 7176
aa5190d0
TM		 7177 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7178 rpc_restart_call_prepare(task);
fc01cea9
AA		 7179 return;
7180 }
7181 }
fc01cea9 7182 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7183out:
fc01cea9
AA		 7184 dprintk("<-- %s\n", __func__);
7185}
7186
7187static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7188{
d5f8d3fe
TM		 7189 struct nfs4_sequence_data *calldata = data;
7190 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7191 struct nfs4_sequence_args *args;
7192 struct nfs4_sequence_res *res;
7193
fc01cea9
AA		 7194 args = task->tk_msg.rpc_argp;
7195 res = task->tk_msg.rpc_resp;
7196
d9afbd1b 7197 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7198}
7199
7200static const struct rpc_call_ops nfs41_sequence_ops = {
7201 .rpc_call_done = nfs41_sequence_call_done,
7202 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7203 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7204};
7205
8fe72bac
TM		 7206static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7207 struct rpc_cred *cred,
7208 bool is_privileged)
fc01cea9 7209{
d5f8d3fe 7210 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7211 struct rpc_message msg = {
7212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7213 .rpc_cred = cred,
7214 };
71ac6da9
TM		 7215 struct rpc_task_setup task_setup_data = {
7216 .rpc_client = clp->cl_rpcclient,
7217 .rpc_message = &msg,
8fe72bac 7218 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7219 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7220 };
fc01cea9 7221
7135840f 7222 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7223 return ERR_PTR(-EIO);
dfb4f309 7224 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7225 if (calldata == NULL) {
7135840f 7226 nfs_put_client(clp);
71ac6da9 7227 return ERR_PTR(-ENOMEM);
fc01cea9 7228 }
a9c92d6b 7229 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7230 if (is_privileged)
7231 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7232 msg.rpc_argp = &calldata->args;
7233 msg.rpc_resp = &calldata->res;
7234 calldata->clp = clp;
71ac6da9 7235 task_setup_data.callback_data = calldata;
fc01cea9 7236
71ac6da9
TM		 7237 return rpc_run_task(&task_setup_data);
7238}
7239
2f60ea6b 7240static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7241{
7242 struct rpc_task *task;
7243 int ret = 0;
7244
2f60ea6b
TM		 7245 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7246 return 0;
8fe72bac 7247 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7248 if (IS_ERR(task))
7249 ret = PTR_ERR(task);
7250 else
bf294b41 7251 rpc_put_task_async(task);
71ac6da9
TM		 7252 dprintk("<-- %s status=%d\n", __func__, ret);
7253 return ret;
7254}
7255
7256static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7257{
7258 struct rpc_task *task;
7259 int ret;
7260
8fe72bac 7261 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7262 if (IS_ERR(task)) {
7263 ret = PTR_ERR(task);
7264 goto out;
7265 }
7266 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7267 if (!ret) {
7268 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7269
7270 if (task->tk_status == 0)
7271 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7272 ret = task->tk_status;
b4410c2f 7273 }
71ac6da9
TM		 7274 rpc_put_task(task);
7275out:
7276 dprintk("<-- %s status=%d\n", __func__, ret);
7277 return ret;
fc01cea9
AA		 7278}
7279
fce5c838
RL		 7280struct nfs4_reclaim_complete_data {
7281 struct nfs_client *clp;
7282 struct nfs41_reclaim_complete_args arg;
7283 struct nfs41_reclaim_complete_res res;
7284};
7285
7286static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7287{
7288 struct nfs4_reclaim_complete_data *calldata = data;
7289
d9afbd1b
TM		 7290 nfs41_setup_sequence(calldata->clp->cl_session,
7291 &calldata->arg.seq_args,
7292 &calldata->res.seq_res,
7293 task);
fce5c838
RL		 7294}
7295
aa5190d0
TM		 7296static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7297{
7298 switch(task->tk_status) {
7299 case 0:
7300 case -NFS4ERR_COMPLETE_ALREADY:
7301 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7302 break;
7303 case -NFS4ERR_DELAY:
aa5190d0 7304 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7305 /* fall through */
7306 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7307 return -EAGAIN;
7308 default:
0400a6b0 7309 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7310 }
7311 return 0;
7312}
7313
fce5c838
RL		 7314static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7315{
7316 struct nfs4_reclaim_complete_data *calldata = data;
7317 struct nfs_client *clp = calldata->clp;
7318 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7319
7320 dprintk("--> %s\n", __func__);
14516c3a
TM		 7321 if (!nfs41_sequence_done(task, res))
7322 return;
fce5c838 7323
c6d01c6f 7324 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7325 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7326 rpc_restart_call_prepare(task);
7327 return;
7328 }
fce5c838
RL		 7329 dprintk("<-- %s\n", __func__);
7330}
7331
7332static void nfs4_free_reclaim_complete_data(void *data)
7333{
7334 struct nfs4_reclaim_complete_data *calldata = data;
7335
7336 kfree(calldata);
7337}
7338
7339static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7340 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7341 .rpc_call_done = nfs4_reclaim_complete_done,
7342 .rpc_release = nfs4_free_reclaim_complete_data,
7343};
7344
7345/*
7346 * Issue a global reclaim complete.
7347 */
965e9c23
TM		 7348static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7349 struct rpc_cred *cred)
fce5c838
RL		 7350{
7351 struct nfs4_reclaim_complete_data *calldata;
7352 struct rpc_task *task;
7353 struct rpc_message msg = {
7354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7355 .rpc_cred = cred,
fce5c838
RL		 7356 };
7357 struct rpc_task_setup task_setup_data = {
7358 .rpc_client = clp->cl_rpcclient,
7359 .rpc_message = &msg,
7360 .callback_ops = &nfs4_reclaim_complete_call_ops,
7361 .flags = RPC_TASK_ASYNC,
7362 };
7363 int status = -ENOMEM;
7364
7365 dprintk("--> %s\n", __func__);
8535b2be 7366 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7367 if (calldata == NULL)
7368 goto out;
7369 calldata->clp = clp;
7370 calldata->arg.one_fs = 0;
fce5c838 7371
a9c92d6b 7372 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7373 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7374 msg.rpc_argp = &calldata->arg;
7375 msg.rpc_resp = &calldata->res;
7376 task_setup_data.callback_data = calldata;
7377 task = rpc_run_task(&task_setup_data);
acf82b85 7378 if (IS_ERR(task)) {
fce5c838 7379 status = PTR_ERR(task);
acf82b85
DC		 7380 goto out;
7381 }
c34c32ea
AA		 7382 status = nfs4_wait_for_completion_rpc_task(task);
7383 if (status == 0)
7384 status = task->tk_status;
fce5c838 7385 rpc_put_task(task);
acf82b85 7386 return 0;
fce5c838
RL		 7387out:
7388 dprintk("<-- %s status=%d\n", __func__, status);
7389 return status;
7390}
b1f69b75
AA		 7391
7392static void
7393nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7394{
7395 struct nfs4_layoutget *lgp = calldata;
c31663d4 7396 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7397 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7398
7399 dprintk("--> %s\n", __func__);
c31663d4
FI		 7400 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7401 * right now covering the LAYOUTGET we are about to send.
7402 * However, that is not so catastrophic, and there seems
7403 * to be no way to prevent it completely.
7404 */
6ba7db34 7405 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7406 &lgp->res.seq_res, task))
b1f69b75 7407 return;
cf7d63f1
FI		 7408 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7409 NFS_I(lgp->args.inode)->layout,
7410 lgp->args.ctx->state)) {
7411 rpc_exit(task, NFS4_OK);
cf7d63f1 7412 }
b1f69b75
AA		 7413}
7414
7415static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7416{
7417 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7418 struct inode *inode = lgp->args.inode;
7419 struct nfs_server *server = NFS_SERVER(inode);
7420 struct pnfs_layout_hdr *lo;
7421 struct nfs4_state *state = NULL;
ed7e5423 7422 unsigned long timeo, now, giveup;
b1f69b75 7423
ed7e5423 7424 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7425
6ba7db34 7426 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7427 goto out;
b1f69b75
AA		 7428
7429 switch (task->tk_status) {
7430 case 0:
ee314c2a 7431 goto out;
ed7e5423
BH		 7432 /*
7433 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7434 * (or clients) writing to the same RAID stripe
7435 */
b1f69b75 7436 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7437 /*
7438 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7439 * existing layout before getting a new one).
7440 */
b1f69b75 7441 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7442 timeo = rpc_get_timeout(task->tk_client);
7443 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7444 now = jiffies;
7445 if (time_after(giveup, now)) {
7446 unsigned long delay;
7447
7448 /* Delay for:
7449 * - Not less then NFS4_POLL_RETRY_MIN.
7450 * - One last time a jiffie before we give up
7451 * - exponential backoff (time_now minus start_attempt)
7452 */
7453 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7454 min((giveup - now - 1),
7455 now - lgp->args.timestamp));
7456
7457 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7458 __func__, delay);
7459 rpc_delay(task, delay);
7460 task->tk_status = 0;
7461 rpc_restart_call_prepare(task);
7462 goto out; /* Do not call nfs4_async_handle_error() */
7463 }
ee314c2a
TM		 7464 break;
7465 case -NFS4ERR_EXPIRED:
7466 case -NFS4ERR_BAD_STATEID:
7467 spin_lock(&inode->i_lock);
7468 lo = NFS_I(inode)->layout;
7469 if (!lo || list_empty(&lo->plh_segs)) {
7470 spin_unlock(&inode->i_lock);
7471 /* If the open stateid was bad, then recover it. */
7472 state = lgp->args.ctx->state;
7473 } else {
7474 LIST_HEAD(head);
7475
7476 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7477 spin_unlock(&inode->i_lock);
7478 /* Mark the bad layout state as invalid, then
7479 * retry using the open stateid. */
7480 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7481 }
7482 }
ee314c2a
TM		 7483 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7484 rpc_restart_call_prepare(task);
7485out:
b1f69b75
AA		 7486 dprintk("<-- %s\n", __func__);
7487}
7488
8554116e
IK		 7489static size_t max_response_pages(struct nfs_server *server)
7490{
7491 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7492 return nfs_page_array_len(0, max_resp_sz);
7493}
7494
7495static void nfs4_free_pages(struct page **pages, size_t size)
7496{
7497 int i;
7498
7499 if (!pages)
7500 return;
7501
7502 for (i = 0; i < size; i++) {
7503 if (!pages[i])
7504 break;
7505 __free_page(pages[i]);
7506 }
7507 kfree(pages);
7508}
7509
7510static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7511{
7512 struct page **pages;
7513 int i;
7514
7515 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7516 if (!pages) {
7517 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7518 return NULL;
7519 }
7520
7521 for (i = 0; i < size; i++) {
7522 pages[i] = alloc_page(gfp_flags);
7523 if (!pages[i]) {
7524 dprintk("%s: failed to allocate page\n", __func__);
7525 nfs4_free_pages(pages, size);
7526 return NULL;
7527 }
7528 }
7529
7530 return pages;
7531}
7532
b1f69b75
AA		 7533static void nfs4_layoutget_release(void *calldata)
7534{
7535 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7536 struct inode *inode = lgp->args.inode;
7537 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7538 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7539
7540 dprintk("--> %s\n", __func__);
8554116e 7541 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7542 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7543 put_nfs_open_context(lgp->args.ctx);
7544 kfree(calldata);
7545 dprintk("<-- %s\n", __func__);
7546}
7547
7548static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7549 .rpc_call_prepare = nfs4_layoutget_prepare,
7550 .rpc_call_done = nfs4_layoutget_done,
7551 .rpc_release = nfs4_layoutget_release,
7552};
7553
a0b0a6e3
TM		 7554struct pnfs_layout_segment *
7555nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7556{
a47970ff
WAA		 7557 struct inode *inode = lgp->args.inode;
7558 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7559 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7560 struct rpc_task *task;
7561 struct rpc_message msg = {
7562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7563 .rpc_argp = &lgp->args,
7564 .rpc_resp = &lgp->res,
6ab59344 7565 .rpc_cred = lgp->cred,
b1f69b75
AA		 7566 };
7567 struct rpc_task_setup task_setup_data = {
7568 .rpc_client = server->client,
7569 .rpc_message = &msg,
7570 .callback_ops = &nfs4_layoutget_call_ops,
7571 .callback_data = lgp,
7572 .flags = RPC_TASK_ASYNC,
7573 };
a0b0a6e3 7574 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7575 int status = 0;
7576
7577 dprintk("--> %s\n", __func__);
7578
8554116e
IK		 7579 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7580 if (!lgp->args.layout.pages) {
7581 nfs4_layoutget_release(lgp);
a0b0a6e3 7582 return ERR_PTR(-ENOMEM);
8554116e
IK		 7583 }
7584 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7585 lgp->args.timestamp = jiffies;
8554116e 7586
35124a09 7587 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7588 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7589 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7590
7591 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7592 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7593
b1f69b75
AA		 7594 task = rpc_run_task(&task_setup_data);
7595 if (IS_ERR(task))
a0b0a6e3 7596 return ERR_CAST(task);
b1f69b75 7597 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7598 if (status == 0)
7599 status = task->tk_status;
1037e6ea
TM		 7600 trace_nfs4_layoutget(lgp->args.ctx,
7601 &lgp->args.range,
7602 &lgp->res.range,
7603 status);
085b7a45
WAA		 7604 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7605 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7606 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7607 rpc_put_task(task);
7608 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7609 if (status)
7610 return ERR_PTR(status);
7611 return lseg;
b1f69b75
AA		 7612}
7613
cbe82603
BH		 7614static void
7615nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7616{
7617 struct nfs4_layoutreturn *lrp = calldata;
7618
7619 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7620 nfs41_setup_sequence(lrp->clp->cl_session,
7621 &lrp->args.seq_args,
7622 &lrp->res.seq_res,
7623 task);
cbe82603
BH		 7624}
7625
7626static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7627{
7628 struct nfs4_layoutreturn *lrp = calldata;
7629 struct nfs_server *server;
7630
7631 dprintk("--> %s\n", __func__);
7632
6ba7db34 7633 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7634 return;
7635
7636 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7637 switch (task->tk_status) {
7638 default:
7639 task->tk_status = 0;
7640 case 0:
7641 break;
7642 case -NFS4ERR_DELAY:
7643 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7644 break;
d00c5d43 7645 rpc_restart_call_prepare(task);
cbe82603
BH		 7646 return;
7647 }
cbe82603
BH		 7648 dprintk("<-- %s\n", __func__);
7649}
7650
7651static void nfs4_layoutreturn_release(void *calldata)
7652{
7653 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7654 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7655
7656 dprintk("--> %s\n", __func__);
849b286f
TM		 7657 spin_lock(&lo->plh_inode->i_lock);
7658 if (lrp->res.lrs_present)
7659 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7660 lo->plh_block_lgets--;
7661 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7662 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7663 kfree(calldata);
7664 dprintk("<-- %s\n", __func__);
7665}
7666
7667static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7668 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7669 .rpc_call_done = nfs4_layoutreturn_done,
7670 .rpc_release = nfs4_layoutreturn_release,
7671};
7672
7673int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7674{
7675 struct rpc_task *task;
7676 struct rpc_message msg = {
7677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7678 .rpc_argp = &lrp->args,
7679 .rpc_resp = &lrp->res,
9556000d 7680 .rpc_cred = lrp->cred,
cbe82603
BH		 7681 };
7682 struct rpc_task_setup task_setup_data = {
1771c577 7683 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7684 .rpc_message = &msg,
7685 .callback_ops = &nfs4_layoutreturn_call_ops,
7686 .callback_data = lrp,
7687 };
7688 int status;
7689
7690 dprintk("--> %s\n", __func__);
a9c92d6b 7691 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7692 task = rpc_run_task(&task_setup_data);
7693 if (IS_ERR(task))
7694 return PTR_ERR(task);
7695 status = task->tk_status;
1037e6ea 7696 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7697 dprintk("<-- %s status=%d\n", __func__, status);
7698 rpc_put_task(task);
7699 return status;
7700}
7701
7f11d8d3
AA		 7702/*
7703 * Retrieve the list of Data Server devices from the MDS.
7704 */
7705static int _nfs4_getdevicelist(struct nfs_server *server,
7706 const struct nfs_fh *fh,
7707 struct pnfs_devicelist *devlist)
7708{
7709 struct nfs4_getdevicelist_args args = {
7710 .fh = fh,
7711 .layoutclass = server->pnfs_curr_ld->id,
7712 };
7713 struct nfs4_getdevicelist_res res = {
7714 .devlist = devlist,
7715 };
7716 struct rpc_message msg = {
7717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7718 .rpc_argp = &args,
7719 .rpc_resp = &res,
7720 };
7721 int status;
7722
7723 dprintk("--> %s\n", __func__);
7724 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7725 &res.seq_res, 0);
7726 dprintk("<-- %s status=%d\n", __func__, status);
7727 return status;
7728}
7729
7730int nfs4_proc_getdevicelist(struct nfs_server *server,
7731 const struct nfs_fh *fh,
7732 struct pnfs_devicelist *devlist)
7733{
7734 struct nfs4_exception exception = { };
7735 int err;
7736
7737 do {
7738 err = nfs4_handle_exception(server,
7739 _nfs4_getdevicelist(server, fh, devlist),
7740 &exception);
7741 } while (exception.retry);
7742
7743 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7744 err, devlist->num_devs);
7745
7746 return err;
7747}
7748EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7749
b1f69b75 7750static int
cd5875fe
TM		 7751_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7752 struct pnfs_device *pdev,
7753 struct rpc_cred *cred)
b1f69b75
AA		 7754{
7755 struct nfs4_getdeviceinfo_args args = {
7756 .pdev = pdev,
7757 };
7758 struct nfs4_getdeviceinfo_res res = {
7759 .pdev = pdev,
7760 };
7761 struct rpc_message msg = {
7762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7763 .rpc_argp = &args,
7764 .rpc_resp = &res,
cd5875fe 7765 .rpc_cred = cred,
b1f69b75
AA		 7766 };
7767 int status;
7768
7769 dprintk("--> %s\n", __func__);
7c513058 7770 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7771 dprintk("<-- %s status=%d\n", __func__, status);
7772
7773 return status;
7774}
7775
cd5875fe
TM		 7776int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7777 struct pnfs_device *pdev,
7778 struct rpc_cred *cred)
b1f69b75
AA		 7779{
7780 struct nfs4_exception exception = { };
7781 int err;
7782
7783 do {
7784 err = nfs4_handle_exception(server,
cd5875fe 7785 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7786 &exception);
7787 } while (exception.retry);
7788 return err;
7789}
7790EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7791
863a3c6c
AA		 7792static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7793{
7794 struct nfs4_layoutcommit_data *data = calldata;
7795 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7796 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7797
d9afbd1b
TM		 7798 nfs41_setup_sequence(session,
7799 &data->args.seq_args,
7800 &data->res.seq_res,
7801 task);
863a3c6c
AA		 7802}
7803
7804static void
7805nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7806{
7807 struct nfs4_layoutcommit_data *data = calldata;
7808 struct nfs_server *server = NFS_SERVER(data->args.inode);
7809
6ba7db34 7810 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7811 return;
7812
7813 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7814 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7815 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7816 case -NFS4ERR_BADLAYOUT: /* no layout */
7817 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7818 task->tk_status = 0;
e59d27e0 7819 case 0:
e59d27e0
TM		 7820 break;
7821 default:
7822 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7823 rpc_restart_call_prepare(task);
7824 return;
7825 }
7826 }
863a3c6c
AA		 7827}
7828
7829static void nfs4_layoutcommit_release(void *calldata)
7830{
7831 struct nfs4_layoutcommit_data *data = calldata;
7832
db29c089 7833 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7834 nfs_post_op_update_inode_force_wcc(data->args.inode,
7835 data->res.fattr);
863a3c6c
AA		 7836 put_rpccred(data->cred);
7837 kfree(data);
7838}
7839
7840static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7841 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7842 .rpc_call_done = nfs4_layoutcommit_done,
7843 .rpc_release = nfs4_layoutcommit_release,
7844};
7845
7846int
ef311537 7847nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7848{
7849 struct rpc_message msg = {
7850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7851 .rpc_argp = &data->args,
7852 .rpc_resp = &data->res,
7853 .rpc_cred = data->cred,
7854 };
7855 struct rpc_task_setup task_setup_data = {
7856 .task = &data->task,
7857 .rpc_client = NFS_CLIENT(data->args.inode),
7858 .rpc_message = &msg,
7859 .callback_ops = &nfs4_layoutcommit_ops,
7860 .callback_data = data,
7861 .flags = RPC_TASK_ASYNC,
7862 };
7863 struct rpc_task *task;
7864 int status = 0;
7865
7866 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7867 "lbw: %llu inode %lu\n",
7868 data->task.tk_pid, sync,
7869 data->args.lastbytewritten,
7870 data->args.inode->i_ino);
7871
a9c92d6b 7872 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7873 task = rpc_run_task(&task_setup_data);
7874 if (IS_ERR(task))
7875 return PTR_ERR(task);
ef311537 7876 if (sync == false)
863a3c6c
AA		 7877 goto out;
7878 status = nfs4_wait_for_completion_rpc_task(task);
7879 if (status != 0)
7880 goto out;
7881 status = task->tk_status;
1037e6ea 7882 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7883out:
7884 dprintk("%s: status %d\n", __func__, status);
7885 rpc_put_task(task);
7886 return status;
7887}
fca78d6d 7888
97431204
AA		 7889/**
7890 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7891 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7892 */
fca78d6d
BS		 7893static int
7894_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7895 struct nfs_fsinfo *info,
7896 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7897{
7898 struct nfs41_secinfo_no_name_args args = {
7899 .style = SECINFO_STYLE_CURRENT_FH,
7900 };
7901 struct nfs4_secinfo_res res = {
7902 .flavors = flavors,
7903 };
7904 struct rpc_message msg = {
7905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7906 .rpc_argp = &args,
7907 .rpc_resp = &res,
7908 };
b1b3e136 7909 struct rpc_clnt *clnt = server->client;
7cb852df 7910 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7911 int status;
7912
7913 if (use_integrity) {
7914 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7915 cred = nfs4_get_clid_cred(server->nfs_client);
7916 msg.rpc_cred = cred;
b1b3e136
WAA		 7917 }
7918
7919 dprintk("--> %s\n", __func__);
7920 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7921 &res.seq_res, 0);
7922 dprintk("<-- %s status=%d\n", __func__, status);
7923
7cb852df
WAA		 7924 if (cred)
7925 put_rpccred(cred);
b1b3e136
WAA		 7926
7927 return status;
fca78d6d
BS		 7928}
7929
7930static int
7931nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7932 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7933{
7934 struct nfs4_exception exception = { };
7935 int err;
7936 do {
b1b3e136
WAA		 7937 /* first try using integrity protection */
7938 err = -NFS4ERR_WRONGSEC;
7939
7940 /* try to use integrity protection with machine cred */
7941 if (_nfs4_is_integrity_protected(server->nfs_client))
7942 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7943 flavors, true);
7944
7945 /*
7946 * if unable to use integrity protection, or SECINFO with
7947 * integrity protection returns NFS4ERR_WRONGSEC (which is
7948 * disallowed by spec, but exists in deployed servers) use
7949 * the current filesystem's rpc_client and the user cred.
7950 */
7951 if (err == -NFS4ERR_WRONGSEC)
7952 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7953 flavors, false);
7954
fca78d6d
BS		 7955 switch (err) {
7956 case 0:
7957 case -NFS4ERR_WRONGSEC:
78b19bae 7958 case -ENOTSUPP:
05e9cfb4 7959 goto out;
fca78d6d
BS		 7960 default:
7961 err = nfs4_handle_exception(server, err, &exception);
7962 }
7963 } while (exception.retry);
05e9cfb4 7964out:
fca78d6d
BS		 7965 return err;
7966}
7967
7968static int
7969nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7970 struct nfs_fsinfo *info)
7971{
7972 int err;
7973 struct page *page;
367156d9 7974 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7975 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7976 struct nfs4_secinfo4 *secinfo;
7977 int i;
fca78d6d
BS		 7978
7979 page = alloc_page(GFP_KERNEL);
7980 if (!page) {
7981 err = -ENOMEM;
7982 goto out;
7983 }
7984
7985 flavors = page_address(page);
7986 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7987
7988 /*
7989 * Fall back on "guess and check" method if
7990 * the server doesn't support SECINFO_NO_NAME
7991 */
78b19bae 7992 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 7993 err = nfs4_find_root_sec(server, fhandle, info);
7994 goto out_freepage;
7995 }
7996 if (err)
7997 goto out_freepage;
7998
58a8cf12
WAA		 7999 for (i = 0; i < flavors->num_flavors; i++) {
8000 secinfo = &flavors->flavors[i];
8001
8002 switch (secinfo->flavor) {
8003 case RPC_AUTH_NULL:
8004 case RPC_AUTH_UNIX:
8005 case RPC_AUTH_GSS:
8006 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8007 &secinfo->flavor_info);
8008 break;
8009 default:
8010 flavor = RPC_AUTH_MAXFLAVOR;
8011 break;
8012 }
8013
4d4b69dd
WAA		 8014 if (!nfs_auth_info_match(&server->auth_info, flavor))
8015 flavor = RPC_AUTH_MAXFLAVOR;
8016
58a8cf12
WAA		 8017 if (flavor != RPC_AUTH_MAXFLAVOR) {
8018 err = nfs4_lookup_root_sec(server, fhandle,
8019 info, flavor);
8020 if (!err)
8021 break;
8022 }
8023 }
8024
8025 if (flavor == RPC_AUTH_MAXFLAVOR)
8026 err = -EPERM;
fca78d6d
BS		 8027
8028out_freepage:
8029 put_page(page);
8030 if (err == -EACCES)
8031 return -EPERM;
8032out:
8033 return err;
8034}
1cab0652 8035
ab7cb0df
TM		 8036static int _nfs41_test_stateid(struct nfs_server *server,
8037 nfs4_stateid *stateid,
8038 struct rpc_cred *cred)
7d974794
BS		 8039{
8040 int status;
8041 struct nfs41_test_stateid_args args = {
1cab0652 8042 .stateid = stateid,
7d974794
BS		 8043 };
8044 struct nfs41_test_stateid_res res;
8045 struct rpc_message msg = {
8046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8047 .rpc_argp = &args,
8048 .rpc_resp = &res,
ab7cb0df 8049 .rpc_cred = cred,
7d974794 8050 };
3787d506
WAA		 8051 struct rpc_clnt *rpc_client = server->client;
8052
8053 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8054 &rpc_client, &msg);
1cab0652 8055
38527b15 8056 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8057 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8058 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8059 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8060 &args.seq_args, &res.seq_res);
38527b15
CL		 8061 if (status != NFS_OK) {
8062 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8063 return status;
38527b15
CL		 8064 }
8065 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8066 return -res.status;
7d974794
BS		 8067}
8068
38527b15
CL		 8069/**
8070 * nfs41_test_stateid - perform a TEST_STATEID operation
8071 *
8072 * @server: server / transport on which to perform the operation
8073 * @stateid: state ID to test
ab7cb0df 8074 * @cred: credential
38527b15
CL		 8075 *
8076 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8077 * Otherwise a negative NFS4ERR value is returned if the operation
8078 * failed or the state ID is not currently valid.
8079 */
ab7cb0df
TM		 8080static int nfs41_test_stateid(struct nfs_server *server,
8081 nfs4_stateid *stateid,
8082 struct rpc_cred *cred)
7d974794
BS		 8083{
8084 struct nfs4_exception exception = { };
8085 int err;
8086 do {
ab7cb0df 8087 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8088 if (err != -NFS4ERR_DELAY)
8089 break;
8090 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8091 } while (exception.retry);
8092 return err;
8093}
9aeda35f 8094
7c1d5fae
TM		 8095struct nfs_free_stateid_data {
8096 struct nfs_server *server;
8097 struct nfs41_free_stateid_args args;
9aeda35f 8098 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8099};
8100
8101static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8102{
8103 struct nfs_free_stateid_data *data = calldata;
8104 nfs41_setup_sequence(nfs4_get_session(data->server),
8105 &data->args.seq_args,
8106 &data->res.seq_res,
8107 task);
8108}
8109
8110static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8111{
8112 struct nfs_free_stateid_data *data = calldata;
8113
8114 nfs41_sequence_done(task, &data->res.seq_res);
8115
8116 switch (task->tk_status) {
8117 case -NFS4ERR_DELAY:
8118 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8119 rpc_restart_call_prepare(task);
8120 }
8121}
8122
8123static void nfs41_free_stateid_release(void *calldata)
8124{
8125 kfree(calldata);
8126}
8127
17f26b12 8128static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8129 .rpc_call_prepare = nfs41_free_stateid_prepare,
8130 .rpc_call_done = nfs41_free_stateid_done,
8131 .rpc_release = nfs41_free_stateid_release,
8132};
8133
8134static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8135 nfs4_stateid *stateid,
ab7cb0df 8136 struct rpc_cred *cred,
7c1d5fae
TM		 8137 bool privileged)
8138{
9aeda35f
BS		 8139 struct rpc_message msg = {
8140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8141 .rpc_cred = cred,
9aeda35f 8142 };
7c1d5fae
TM		 8143 struct rpc_task_setup task_setup = {
8144 .rpc_client = server->client,
8145 .rpc_message = &msg,
8146 .callback_ops = &nfs41_free_stateid_ops,
8147 .flags = RPC_TASK_ASYNC,
8148 };
8149 struct nfs_free_stateid_data *data;
9aeda35f 8150
3787d506
WAA		 8151 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8152 &task_setup.rpc_client, &msg);
8153
38527b15 8154 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8155 data = kmalloc(sizeof(*data), GFP_NOFS);
8156 if (!data)
8157 return ERR_PTR(-ENOMEM);
8158 data->server = server;
8159 nfs4_stateid_copy(&data->args.stateid, stateid);
8160
8161 task_setup.callback_data = data;
8162
8163 msg.rpc_argp = &data->args;
8164 msg.rpc_resp = &data->res;
a9c92d6b 8165 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8166 if (privileged)
8167 nfs4_set_sequence_privileged(&data->args.seq_args);
8168
8169 return rpc_run_task(&task_setup);
9aeda35f
BS		 8170}
8171
38527b15
CL		 8172/**
8173 * nfs41_free_stateid - perform a FREE_STATEID operation
8174 *
8175 * @server: server / transport on which to perform the operation
8176 * @stateid: state ID to release
ab7cb0df 8177 * @cred: credential
38527b15
CL		 8178 *
8179 * Returns NFS_OK if the server freed "stateid". Otherwise a
8180 * negative NFS4ERR value is returned.
8181 */
ab7cb0df
TM		 8182static int nfs41_free_stateid(struct nfs_server *server,
8183 nfs4_stateid *stateid,
8184 struct rpc_cred *cred)
9aeda35f 8185{
7c1d5fae
TM		 8186 struct rpc_task *task;
8187 int ret;
8188
ab7cb0df 8189 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8190 if (IS_ERR(task))
8191 return PTR_ERR(task);
8192 ret = rpc_wait_for_completion_task(task);
8193 if (!ret)
8194 ret = task->tk_status;
8195 rpc_put_task(task);
8196 return ret;
9aeda35f 8197}
36281caa 8198
c8b2d0bf
TM		 8199static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8200{
8201 struct rpc_task *task;
ab7cb0df 8202 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8203
ab7cb0df 8204 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8205 nfs4_free_lock_state(server, lsp);
8206 if (IS_ERR(task))
8207 return PTR_ERR(task);
8208 rpc_put_task(task);
8209 return 0;
8210}
8211
36281caa
TM		 8212static bool nfs41_match_stateid(const nfs4_stateid *s1,
8213 const nfs4_stateid *s2)
8214{
2d2f24ad 8215 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8216 return false;
8217
2d2f24ad 8218 if (s1->seqid == s2->seqid)
36281caa 8219 return true;
2d2f24ad 8220 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8221 return true;
8222
8223 return false;
8224}
8225
557134a3
AA		 8226#endif /* CONFIG_NFS_V4_1 */
8227
36281caa
TM		 8228static bool nfs4_match_stateid(const nfs4_stateid *s1,
8229 const nfs4_stateid *s2)
8230{
f597c537 8231 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8232}
8233
8234
17280175 8235static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8236 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8237 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8238 .recover_open = nfs4_open_reclaim,
8239 .recover_lock = nfs4_lock_reclaim,
591d71cb 8240 .establish_clid = nfs4_init_clientid,
05f4c350 8241 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8242};
8243
591d71cb 8244#if defined(CONFIG_NFS_V4_1)
17280175 8245static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8246 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8247 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8248 .recover_open = nfs4_open_reclaim,
8249 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8250 .establish_clid = nfs41_init_clientid,
fce5c838 8251 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8252 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8253};
8254#endif /* CONFIG_NFS_V4_1 */
8255
17280175 8256static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8257 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8258 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8259 .recover_open = nfs4_open_expired,
8260 .recover_lock = nfs4_lock_expired,
8261 .establish_clid = nfs4_init_clientid,
8262};
8263
8264#if defined(CONFIG_NFS_V4_1)
17280175 8265static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8266 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8267 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8268 .recover_open = nfs41_open_expired,
8269 .recover_lock = nfs41_lock_expired,
4d643d1d 8270 .establish_clid = nfs41_init_clientid,
1da177e4 8271};
591d71cb 8272#endif /* CONFIG_NFS_V4_1 */
1da177e4 8273
17280175 8274static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8275 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8276 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8277 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8278};
8279
8280#if defined(CONFIG_NFS_V4_1)
17280175 8281static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8282 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8283 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8284 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8285};
8286#endif
8287
ec011fe8 8288static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8289 .get_locations = _nfs40_proc_get_locations,
44c99933 8290 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8291};
8292
8293#if defined(CONFIG_NFS_V4_1)
8294static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8295 .get_locations = _nfs41_proc_get_locations,
44c99933 8296 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8297};
8298#endif /* CONFIG_NFS_V4_1 */
8299
97dc1359
TM		 8300static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8301 .minor_version = 0,
39c6daae
TM		 8302 .init_caps = NFS_CAP_READDIRPLUS
8303 | NFS_CAP_ATOMIC_OPEN
8304 | NFS_CAP_CHANGE_ATTR
8305 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8306 .init_client = nfs40_init_client,
8307 .shutdown_client = nfs40_shutdown_client,
36281caa 8308 .match_stateid = nfs4_match_stateid,
fca78d6d 8309 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8310 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8311 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8312 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8313 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8314 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8315 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8316};
8317
8318#if defined(CONFIG_NFS_V4_1)
8319static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8320 .minor_version = 1,
39c6daae
TM		 8321 .init_caps = NFS_CAP_READDIRPLUS
8322 | NFS_CAP_ATOMIC_OPEN
8323 | NFS_CAP_CHANGE_ATTR
3b66486c 8324 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8325 | NFS_CAP_STATEID_NFSV41
8326 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8327 .init_client = nfs41_init_client,
8328 .shutdown_client = nfs41_shutdown_client,
36281caa 8329 .match_stateid = nfs41_match_stateid,
fca78d6d 8330 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8331 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8332 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8333 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8334 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8335 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8336 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8337};
8338#endif
8339
42c2c424
SD		 8340#if defined(CONFIG_NFS_V4_2)
8341static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8342 .minor_version = 2,
7017310a
BS		 8343 .init_caps = NFS_CAP_READDIRPLUS
8344 | NFS_CAP_ATOMIC_OPEN
8345 | NFS_CAP_CHANGE_ATTR
8346 | NFS_CAP_POSIX_LOCK
8347 | NFS_CAP_STATEID_NFSV41
8348 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8349 .init_client = nfs41_init_client,
8350 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8351 .match_stateid = nfs41_match_stateid,
8352 .find_root_sec = nfs41_find_root_sec,
7017310a 8353 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8354 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8355 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8356 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8357 .state_renewal_ops = &nfs41_state_renewal_ops,
8358};
8359#endif
8360
97dc1359
TM		 8361const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8362 [0] = &nfs_v4_0_minor_ops,
8363#if defined(CONFIG_NFS_V4_1)
8364 [1] = &nfs_v4_1_minor_ops,
8365#endif
42c2c424
SD		 8366#if defined(CONFIG_NFS_V4_2)
8367 [2] = &nfs_v4_2_minor_ops,
8368#endif
97dc1359
TM		 8369};
8370
17f26b12 8371static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8372 .create = nfs_create,
8373 .lookup = nfs_lookup,
8374 .atomic_open = nfs_atomic_open,
8375 .link = nfs_link,
8376 .unlink = nfs_unlink,
8377 .symlink = nfs_symlink,
8378 .mkdir = nfs_mkdir,
8379 .rmdir = nfs_rmdir,
8380 .mknod = nfs_mknod,
8381 .rename = nfs_rename,
8382 .permission = nfs_permission,
8383 .getattr = nfs_getattr,
8384 .setattr = nfs_setattr,
8385 .getxattr = generic_getxattr,
8386 .setxattr = generic_setxattr,
8387 .listxattr = generic_listxattr,
8388 .removexattr = generic_removexattr,
8389};
8390
92e1d5be 8391static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8392 .permission = nfs_permission,
8393 .getattr = nfs_getattr,
8394 .setattr = nfs_setattr,
64c2ce8b
AK		 8395 .getxattr = generic_getxattr,
8396 .setxattr = generic_setxattr,
8397 .listxattr = generic_listxattr,
8398 .removexattr = generic_removexattr,
6b3b5496
BF		 8399};
8400
509de811 8401const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8402 .version = 4, /* protocol version */
8403 .dentry_ops = &nfs4_dentry_operations,
8404 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8405 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8406 .file_ops = &nfs4_file_operations,
1da177e4 8407 .getroot = nfs4_proc_get_root,
281cad46 8408 .submount = nfs4_submount,
ff9099f2 8409 .try_mount = nfs4_try_mount,
1da177e4
LT		 8410 .getattr = nfs4_proc_getattr,
8411 .setattr = nfs4_proc_setattr,
8412 .lookup = nfs4_proc_lookup,
8413 .access = nfs4_proc_access,
8414 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8415 .create = nfs4_proc_create,
8416 .remove = nfs4_proc_remove,
8417 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8418 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8419 .unlink_done = nfs4_proc_unlink_done,
8420 .rename = nfs4_proc_rename,
d3d4152a 8421 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8422 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8423 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8424 .link = nfs4_proc_link,
8425 .symlink = nfs4_proc_symlink,
8426 .mkdir = nfs4_proc_mkdir,
8427 .rmdir = nfs4_proc_remove,
8428 .readdir = nfs4_proc_readdir,
8429 .mknod = nfs4_proc_mknod,
8430 .statfs = nfs4_proc_statfs,
8431 .fsinfo = nfs4_proc_fsinfo,
8432 .pathconf = nfs4_proc_pathconf,
e9326dca 8433 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8434 .decode_dirent = nfs4_decode_dirent,
8435 .read_setup = nfs4_proc_read_setup,
1abb5088 8436 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8437 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8438 .read_done = nfs4_read_done,
1da177e4 8439 .write_setup = nfs4_proc_write_setup,
57208fa7 8440 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8441 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8442 .write_done = nfs4_write_done,
1da177e4 8443 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8444 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8445 .commit_done = nfs4_commit_done,
1da177e4 8446 .lock = nfs4_proc_lock,
e50a1c2e 8447 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8448 .close_context = nfs4_close_context,
2b484297 8449 .open_context = nfs4_atomic_open,
011e2a7f 8450 .have_delegation = nfs4_have_delegation,
57ec14c5 8451 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8452 .alloc_client = nfs4_alloc_client,
45a52a02 8453 .init_client = nfs4_init_client,
cdb7eced 8454 .free_client = nfs4_free_client,
1179acc6
BS		 8455 .create_server = nfs4_create_server,
8456 .clone_server = nfs_clone_server,
1da177e4
LT		 8457};
8458
64c2ce8b
AK		 8459static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8460 .prefix = XATTR_NAME_NFSV4_ACL,
8461 .list = nfs4_xattr_list_nfs4_acl,
8462 .get = nfs4_xattr_get_nfs4_acl,
8463 .set = nfs4_xattr_set_nfs4_acl,
8464};
8465
8466const struct xattr_handler *nfs4_xattr_handlers[] = {
8467 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8468#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8469 &nfs4_xattr_nfs4_label_handler,
8470#endif
64c2ce8b
AK		 8471 NULL
8472};
8473
1da177e4
LT		 8474/*
8475 * Local variables:
8476 * c-basic-offset: 8
8477 * End:
8478 */
Linux 6.x block layer and io_uring tree(s)