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NFSv4: Fix a nograce recovery hang
[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>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
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"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 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 */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
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 */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498 588 if (send_new_highest_used_slotid)
3f10a6af 589 nfs41_notify_server(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, 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 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
a49c2691 915 struct nfs4_label *a_label;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
2b0143b5 1006 struct inode *dir = d_inode(parent);
e56e0b78 1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
a49c2691
KM		 1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
63f5f796
TM		 1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1025 if (IS_ERR(p->o_arg.seqid))
14c43f76 1026 goto err_free_label;
82a2c1b7
AV		 1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
e56e0b78
TM		 1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
dc0b027d
TM		 1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
ae2bb032
WAA		 1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1043 }
7539bbab 1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1047 p->o_arg.name = &dentry->d_name;
e56e0b78 1048 p->o_arg.server = server;
aa9c2669 1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
4a1c0893
TM		 1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1064 }
536e43d1 1065 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1066 __u32 verf[2];
d77d76ff 1067
e56e0b78
TM		 1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1075 }
cdd4e68b
TM		 1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1079 nfs4_init_opendata_res(p);
c6d00e63 1080 kref_init(&p->kref);
e56e0b78 1081 return p;
14c43f76
DQ		 1082
1083err_free_label:
a49c2691
KM		 1084 nfs4_label_free(p->a_label);
1085err_free_f:
14c43f76
DQ		 1086 nfs4_label_free(p->f_label);
1087err_free_p:
e56e0b78
TM		 1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
c6d00e63 1094static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1095{
c6d00e63
TM		 1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
82a2c1b7 1098 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1099
1100 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
c6d00e63 1103 nfs4_put_state_owner(p->owner);
14c43f76 1104
a49c2691 1105 nfs4_label_free(p->a_label);
14c43f76
DQ		 1106 nfs4_label_free(p->f_label);
1107
c6d00e63 1108 dput(p->dir);
82a2c1b7
AV		 1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
6926afd1 1111 nfs_fattr_free_names(&p->f_attr);
e911b815 1112 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1120}
1121
06f814a3
TM		 1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
06f814a3
TM		 1124 int ret;
1125
06f814a3 1126 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1127 return ret;
1128}
1129
24311f88
TM		 1130static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1131 fmode_t fmode)
1132{
1133 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1134 case FMODE_READ|FMODE_WRITE:
1135 return state->n_rdwr != 0;
1136 case FMODE_WRITE:
1137 return state->n_wronly != 0;
1138 case FMODE_READ:
1139 return state->n_rdonly != 0;
1140 }
1141 WARN_ON_ONCE(1);
1142 return false;
1143}
1144
dc0b027d 1145static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1146{
1147 int ret = 0;
dc0b027d 1148
536e43d1 1149 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1150 goto out;
1151 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1152 case FMODE_READ:
88069f77
TM		 1153 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1154 && state->n_rdonly != 0;
6ee41268
TM		 1155 break;
1156 case FMODE_WRITE:
88069f77
TM		 1157 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1158 && state->n_wronly != 0;
6ee41268
TM		 1159 break;
1160 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1161 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1162 && state->n_rdwr != 0;
6ee41268 1163 }
dc0b027d 1164out:
6ee41268
TM		 1165 return ret;
1166}
1167
2a606188
TM		 1168static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1169 enum open_claim_type4 claim)
aac00a8d 1170{
652f89f6
TM		 1171 if (delegation == NULL)
1172 return 0;
dc0b027d 1173 if ((delegation->type & fmode) != fmode)
aac00a8d 1174 return 0;
d25be546
TM		 1175 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1176 return 0;
2a606188
TM		 1177 switch (claim) {
1178 case NFS4_OPEN_CLAIM_NULL:
1179 case NFS4_OPEN_CLAIM_FH:
1180 break;
1181 case NFS4_OPEN_CLAIM_PREVIOUS:
1182 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1183 break;
1184 default:
1185 return 0;
1186 }
b7391f44 1187 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1188 return 1;
1189}
1190
dc0b027d 1191static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1192{
dc0b027d 1193 switch (fmode) {
e7616923
TM		 1194 case FMODE_WRITE:
1195 state->n_wronly++;
1196 break;
1197 case FMODE_READ:
1198 state->n_rdonly++;
1199 break;
1200 case FMODE_READ|FMODE_WRITE:
1201 state->n_rdwr++;
1202 }
dc0b027d 1203 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1204}
1205
4f14c194
TM		 1206static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1207{
1208 struct nfs_client *clp = state->owner->so_server->nfs_client;
1209 bool need_recover = false;
1210
1211 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1212 need_recover = true;
1213 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1214 need_recover = true;
1215 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1216 need_recover = true;
1217 if (need_recover)
1218 nfs4_state_mark_reclaim_nograce(clp, state);
1219}
1220
e999e80e
TM		 1221static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1222 nfs4_stateid *stateid)
1223{
1224 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1225 return true;
4f14c194
TM		 1226 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1227 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1228 return true;
4f14c194 1229 }
e999e80e
TM		 1230 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1231 return true;
1232 return false;
1233}
1234
f95549cf
TM		 1235static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1236{
3c38cbe2
TM		 1237 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1238 return;
f95549cf
TM		 1239 if (state->n_wronly)
1240 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1241 if (state->n_rdonly)
1242 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1243 if (state->n_rdwr)
1244 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1245 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1246}
1247
226056c5 1248static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1249 nfs4_stateid *arg_stateid,
226056c5 1250 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1251{
226056c5
TM		 1252 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1253 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1254 case FMODE_WRITE:
1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1256 break;
1257 case FMODE_READ:
1258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1259 break;
1260 case 0:
1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_bit(NFS_OPEN_STATE, &state->flags);
1264 }
1265 if (stateid == NULL)
1266 return;
f95549cf 1267 /* Handle races with OPEN */
4a1e2feb
TM		 1268 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1269 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1270 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1271 nfs_resync_open_stateid_locked(state);
226056c5 1272 return;
f95549cf 1273 }
003707c7 1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1277}
1278
4a1e2feb
TM		 1279static void nfs_clear_open_stateid(struct nfs4_state *state,
1280 nfs4_stateid *arg_stateid,
1281 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1282{
1283 write_seqlock(&state->seqlock);
4a1e2feb 1284 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1285 write_sequnlock(&state->seqlock);
4f14c194
TM		 1286 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1287 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1288}
1289
dc0b027d 1290static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1291{
dc0b027d 1292 switch (fmode) {
003707c7
TM		 1293 case FMODE_READ:
1294 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1295 break;
1296 case FMODE_WRITE:
1297 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 set_bit(NFS_O_RDWR_STATE, &state->flags);
1301 }
e999e80e
TM		 1302 if (!nfs_need_update_open_stateid(state, stateid))
1303 return;
1304 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1305 nfs4_stateid_copy(&state->stateid, stateid);
1306 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1307}
1308
dc0b027d 1309static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1310{
8bda4e4c
TM		 1311 /*
1312 * Protect the call to nfs4_state_set_mode_locked and
1313 * serialise the stateid update
1314 */
1315 write_seqlock(&state->seqlock);
003707c7 1316 if (deleg_stateid != NULL) {
f597c537 1317 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1318 set_bit(NFS_DELEGATED_STATE, &state->flags);
1319 }
1320 if (open_stateid != NULL)
dc0b027d 1321 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1322 write_sequnlock(&state->seqlock);
1323 spin_lock(&state->owner->so_lock);
dc0b027d 1324 update_open_stateflags(state, fmode);
ec073428 1325 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1326}
1327
dc0b027d 1328static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1329{
1330 struct nfs_inode *nfsi = NFS_I(state->inode);
1331 struct nfs_delegation *deleg_cur;
1332 int ret = 0;
1333
dc0b027d 1334 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1335
1336 rcu_read_lock();
1337 deleg_cur = rcu_dereference(nfsi->delegation);
1338 if (deleg_cur == NULL)
1339 goto no_delegation;
1340
1341 spin_lock(&deleg_cur->lock);
17f26b12 1342 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1343 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1344 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1345 goto no_delegation_unlock;
1346
1347 if (delegation == NULL)
1348 delegation = &deleg_cur->stateid;
f597c537 1349 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1350 goto no_delegation_unlock;
1351
b7391f44 1352 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1353 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1354 ret = 1;
1355no_delegation_unlock:
1356 spin_unlock(&deleg_cur->lock);
1357no_delegation:
1358 rcu_read_unlock();
1359
1360 if (!ret && open_stateid != NULL) {
dc0b027d 1361 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1362 ret = 1;
1363 }
4f14c194
TM		 1364 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1365 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1366
1367 return ret;
1368}
1369
39071e6f
TM		 1370static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1371 const nfs4_stateid *stateid)
1372{
1373 struct nfs4_state *state = lsp->ls_state;
1374 bool ret = false;
1375
1376 spin_lock(&state->state_lock);
1377 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1378 goto out_noupdate;
1379 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1380 goto out_noupdate;
1381 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1382 ret = true;
1383out_noupdate:
1384 spin_unlock(&state->state_lock);
1385 return ret;
1386}
34310430 1387
dc0b027d 1388static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1389{
1390 struct nfs_delegation *delegation;
1391
1392 rcu_read_lock();
1393 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1394 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1395 rcu_read_unlock();
1396 return;
1397 }
1398 rcu_read_unlock();
57ec14c5 1399 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1400}
1401
6ee41268 1402static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1403{
1404 struct nfs4_state *state = opendata->state;
1405 struct nfs_inode *nfsi = NFS_I(state->inode);
1406 struct nfs_delegation *delegation;
f448badd 1407 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1408 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1409 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1410 nfs4_stateid stateid;
1411 int ret = -EAGAIN;
1412
aac00a8d 1413 for (;;) {
61beef75 1414 spin_lock(&state->owner->so_lock);
dc0b027d 1415 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1416 update_open_stateflags(state, fmode);
6ee41268 1417 spin_unlock(&state->owner->so_lock);
61beef75 1418 goto out_return_state;
6ee41268 1419 }
61beef75 1420 spin_unlock(&state->owner->so_lock);
34310430
TM		 1421 rcu_read_lock();
1422 delegation = rcu_dereference(nfsi->delegation);
2a606188 1423 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1424 rcu_read_unlock();
aac00a8d 1425 break;
34310430 1426 }
aac00a8d 1427 /* Save the delegation */
f597c537 1428 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1429 rcu_read_unlock();
fa332941 1430 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1431 if (!opendata->is_recover) {
1432 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1433 if (ret != 0)
1434 goto out;
1435 }
aac00a8d 1436 ret = -EAGAIN;
34310430
TM		 1437
1438 /* Try to update the stateid using the delegation */
dc0b027d 1439 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1440 goto out_return_state;
aac00a8d 1441 }
aac00a8d
TM		 1442out:
1443 return ERR_PTR(ret);
1444out_return_state:
1445 atomic_inc(&state->count);
1446 return state;
1447}
1448
e23008ec
AA		 1449static void
1450nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1451{
1452 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1453 struct nfs_delegation *delegation;
1454 int delegation_flags = 0;
1455
1456 rcu_read_lock();
1457 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1458 if (delegation)
1459 delegation_flags = delegation->flags;
1460 rcu_read_unlock();
72d79ff8
TM		 1461 switch (data->o_arg.claim) {
1462 default:
1463 break;
1464 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1465 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1466 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1467 "returning a delegation for "
1468 "OPEN(CLAIM_DELEGATE_CUR)\n",
1469 clp->cl_hostname);
72d79ff8
TM		 1470 return;
1471 }
1472 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1473 nfs_inode_set_delegation(state->inode,
1474 data->owner->so_cred,
1475 &data->o_res);
1476 else
1477 nfs_inode_reclaim_delegation(state->inode,
1478 data->owner->so_cred,
1479 &data->o_res);
1480}
1481
1482/*
1483 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1484 * and update the nfs4_state.
1485 */
1486static struct nfs4_state *
1487_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1488{
1489 struct inode *inode = data->state->inode;
1490 struct nfs4_state *state = data->state;
1491 int ret;
1492
d2bfda2e
WAA		 1493 if (!data->rpc_done) {
1494 if (data->rpc_status) {
1495 ret = data->rpc_status;
1496 goto err;
1497 }
1498 /* cached opens have already been processed */
1499 goto update;
e23008ec
AA		 1500 }
1501
e23008ec
AA		 1502 ret = nfs_refresh_inode(inode, &data->f_attr);
1503 if (ret)
1504 goto err;
1505
1506 if (data->o_res.delegation_type != 0)
1507 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1508update:
e23008ec
AA		 1509 update_open_stateid(state, &data->o_res.stateid, NULL,
1510 data->o_arg.fmode);
d49f042a 1511 atomic_inc(&state->count);
e23008ec
AA		 1512
1513 return state;
1514err:
1515 return ERR_PTR(ret);
1516
1517}
1518
1519static struct nfs4_state *
1520_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1521{
1522 struct inode *inode;
1523 struct nfs4_state *state = NULL;
1b370bc2 1524 int ret;
24ac23ab 1525
aac00a8d 1526 if (!data->rpc_done) {
6ee41268 1527 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1528 goto out;
1529 }
1530
1b370bc2 1531 ret = -EAGAIN;
24ac23ab 1532 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1533 goto err;
1775fd3e 1534 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1535 ret = PTR_ERR(inode);
03f28e3a 1536 if (IS_ERR(inode))
1b370bc2
TM		 1537 goto err;
1538 ret = -ENOMEM;
24ac23ab
TM		 1539 state = nfs4_get_open_state(inode, data->owner);
1540 if (state == NULL)
1b370bc2 1541 goto err_put_inode;
e23008ec
AA		 1542 if (data->o_res.delegation_type != 0)
1543 nfs4_opendata_check_deleg(data, state);
34310430 1544 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1545 data->o_arg.fmode);
24ac23ab 1546 iput(inode);
aac00a8d 1547out:
7aa262b5 1548 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1549 return state;
1b370bc2
TM		 1550err_put_inode:
1551 iput(inode);
1552err:
1553 return ERR_PTR(ret);
24ac23ab
TM		 1554}
1555
e23008ec
AA		 1556static struct nfs4_state *
1557nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1558{
1559 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1560 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1561 return _nfs4_opendata_to_nfs4_state(data);
1562}
1563
864472e9
TM		 1564static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1565{
1566 struct nfs_inode *nfsi = NFS_I(state->inode);
1567 struct nfs_open_context *ctx;
1568
1569 spin_lock(&state->inode->i_lock);
1570 list_for_each_entry(ctx, &nfsi->open_files, list) {
1571 if (ctx->state != state)
1572 continue;
1573 get_nfs_open_context(ctx);
1574 spin_unlock(&state->inode->i_lock);
1575 return ctx;
1576 }
1577 spin_unlock(&state->inode->i_lock);
1578 return ERR_PTR(-ENOENT);
1579}
1580
4a1c0893
TM		 1581static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1582 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1583{
1584 struct nfs4_opendata *opendata;
1585
4a1c0893 1586 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1587 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1588 if (opendata == NULL)
1589 return ERR_PTR(-ENOMEM);
1590 opendata->state = state;
1591 atomic_inc(&state->count);
1592 return opendata;
1593}
1594
24311f88
TM		 1595static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1596 fmode_t fmode)
864472e9 1597{
2ced46c2 1598 struct nfs4_state *newstate;
864472e9
TM		 1599 int ret;
1600
24311f88 1601 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1602 return 0;
dc0b027d
TM		 1603 opendata->o_arg.open_flags = 0;
1604 opendata->o_arg.fmode = fmode;
be36e185
TM		 1605 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1606 NFS_SB(opendata->dentry->d_sb),
1607 fmode, 0);
2ced46c2
TM		 1608 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1609 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1610 nfs4_init_opendata_res(opendata);
b257957e 1611 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1612 if (ret != 0)
1613 return ret;
2ced46c2 1614 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1615 if (IS_ERR(newstate))
1616 return PTR_ERR(newstate);
24311f88
TM		 1617 if (newstate != opendata->state)
1618 ret = -ESTALE;
643168c2 1619 nfs4_close_state(newstate, fmode);
24311f88 1620 return ret;
864472e9
TM		 1621}
1622
1623static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1624{
864472e9
TM		 1625 int ret;
1626
4f14c194
TM		 1627 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1628 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1629 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1630 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1631 /* memory barrier prior to reading state->n_* */
2ced46c2 1632 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1633 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1634 smp_rmb();
24311f88
TM		 1635 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1636 if (ret != 0)
1637 return ret;
1638 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1639 if (ret != 0)
1640 return ret;
1641 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1642 if (ret != 0)
1643 return ret;
1ac7e2fd
TM		 1644 /*
1645 * We may have performed cached opens for all three recoveries.
1646 * Check if we need to update the current stateid.
1647 */
1648 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1649 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1650 write_seqlock(&state->seqlock);
1ac7e2fd 1651 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1652 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1653 write_sequnlock(&state->seqlock);
1ac7e2fd 1654 }
864472e9
TM		 1655 return 0;
1656}
1657
1da177e4
LT		 1658/*
1659 * OPEN_RECLAIM:
1660 * reclaim state on the server after a reboot.
1da177e4 1661 */
539cd03a 1662static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1663{
1ac7e2fd 1664 struct nfs_delegation *delegation;
864472e9 1665 struct nfs4_opendata *opendata;
dc0b027d 1666 fmode_t delegation_type = 0;
1da177e4
LT		 1667 int status;
1668
4a1c0893
TM		 1669 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1670 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1671 if (IS_ERR(opendata))
1672 return PTR_ERR(opendata);
1ac7e2fd
TM		 1673 rcu_read_lock();
1674 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1675 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1676 delegation_type = delegation->type;
1ac7e2fd 1677 rcu_read_unlock();
864472e9
TM		 1678 opendata->o_arg.u.delegation_type = delegation_type;
1679 status = nfs4_open_recover(opendata, state);
c6d00e63 1680 nfs4_opendata_put(opendata);
1da177e4
LT		 1681 return status;
1682}
1683
539cd03a 1684static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1685{
1686 struct nfs_server *server = NFS_SERVER(state->inode);
1687 struct nfs4_exception exception = { };
1688 int err;
1689 do {
539cd03a 1690 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1691 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1692 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1693 continue;
168667c4 1694 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1695 break;
1696 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1697 } while (exception.retry);
1698 return err;
1699}
1700
864472e9
TM		 1701static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1702{
1703 struct nfs_open_context *ctx;
1704 int ret;
1705
1706 ctx = nfs4_state_find_open_context(state);
1707 if (IS_ERR(ctx))
91876b13 1708 return -EAGAIN;
539cd03a 1709 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1710 put_nfs_open_context(ctx);
1711 return ret;
1712}
1713
db4f2e63 1714static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1715{
be76b5b6
TM		 1716 switch (err) {
1717 default:
1718 printk(KERN_ERR "NFS: %s: unhandled error "
1719 "%d.\n", __func__, err);
1720 case 0:
1721 case -ENOENT:
8eee52af 1722 case -EAGAIN:
be76b5b6
TM		 1723 case -ESTALE:
1724 break;
1725 case -NFS4ERR_BADSESSION:
1726 case -NFS4ERR_BADSLOT:
1727 case -NFS4ERR_BAD_HIGH_SLOT:
1728 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1729 case -NFS4ERR_DEADSESSION:
1730 set_bit(NFS_DELEGATED_STATE, &state->flags);
1731 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1732 return -EAGAIN;
1733 case -NFS4ERR_STALE_CLIENTID:
1734 case -NFS4ERR_STALE_STATEID:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 case -NFS4ERR_EXPIRED:
1737 /* Don't recall a delegation if it was lost */
1738 nfs4_schedule_lease_recovery(server->nfs_client);
1739 return -EAGAIN;
352297b9
CL		 1740 case -NFS4ERR_MOVED:
1741 nfs4_schedule_migration_recovery(server);
1742 return -EAGAIN;
8ef2f8d4
CL		 1743 case -NFS4ERR_LEASE_MOVED:
1744 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1745 return -EAGAIN;
be76b5b6
TM		 1746 case -NFS4ERR_DELEG_REVOKED:
1747 case -NFS4ERR_ADMIN_REVOKED:
1748 case -NFS4ERR_BAD_STATEID:
db4f2e63 1749 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1750 nfs_inode_find_state_and_recover(state->inode,
1751 stateid);
1752 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1753 return -EAGAIN;
be76b5b6
TM		 1754 case -NFS4ERR_DELAY:
1755 case -NFS4ERR_GRACE:
1756 set_bit(NFS_DELEGATED_STATE, &state->flags);
1757 ssleep(1);
1758 return -EAGAIN;
db4f2e63
TM		 1759 case -ENOMEM:
1760 case -NFS4ERR_DENIED:
1761 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1762 return 0;
be76b5b6 1763 }
1da177e4
LT		 1764 return err;
1765}
1766
24311f88
TM		 1767int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1768 struct nfs4_state *state, const nfs4_stateid *stateid,
1769 fmode_t type)
db4f2e63
TM		 1770{
1771 struct nfs_server *server = NFS_SERVER(state->inode);
1772 struct nfs4_opendata *opendata;
24311f88 1773 int err = 0;
db4f2e63
TM		 1774
1775 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1776 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1777 if (IS_ERR(opendata))
1778 return PTR_ERR(opendata);
1779 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
24311f88
TM		 1780 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1781 switch (type & (FMODE_READ|FMODE_WRITE)) {
1782 case FMODE_READ|FMODE_WRITE:
1783 case FMODE_WRITE:
1784 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1785 if (err)
1786 break;
1787 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1788 if (err)
1789 break;
1790 case FMODE_READ:
1791 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1792 }
db4f2e63
TM		 1793 nfs4_opendata_put(opendata);
1794 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1795}
1796
be05c860
CL		 1797static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1798{
1799 struct nfs4_opendata *data = calldata;
1800
cb04ad2a
PT		 1801 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1802 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1803}
1804
cdd4e68b
TM		 1805static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1806{
1807 struct nfs4_opendata *data = calldata;
1808
17ead6c8 1809 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1810
cdd4e68b 1811 data->rpc_status = task->tk_status;
26e976a8 1812 if (data->rpc_status == 0) {
f597c537 1813 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1814 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1815 renew_lease(data->o_res.server, data->timestamp);
3e309914 1816 data->rpc_done = 1;
26e976a8 1817 }
cdd4e68b
TM		 1818}
1819
1820static void nfs4_open_confirm_release(void *calldata)
1821{
1822 struct nfs4_opendata *data = calldata;
1823 struct nfs4_state *state = NULL;
1824
1825 /* If this request hasn't been cancelled, do nothing */
1826 if (data->cancelled == 0)
1827 goto out_free;
1828 /* In case of error, no cleanup! */
3e309914 1829 if (!data->rpc_done)
cdd4e68b 1830 goto out_free;
cdd4e68b 1831 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1832 if (!IS_ERR(state))
643168c2 1833 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1834out_free:
c6d00e63 1835 nfs4_opendata_put(data);
cdd4e68b
TM		 1836}
1837
1838static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1839 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1840 .rpc_call_done = nfs4_open_confirm_done,
1841 .rpc_release = nfs4_open_confirm_release,
1842};
1843
1844/*
1845 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1846 */
1847static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1848{
2b0143b5 1849 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1850 struct rpc_task *task;
5138fde0
TM		 1851 struct rpc_message msg = {
1852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1853 .rpc_argp = &data->c_arg,
1854 .rpc_resp = &data->c_res,
1855 .rpc_cred = data->owner->so_cred,
1856 };
c970aa85
TM		 1857 struct rpc_task_setup task_setup_data = {
1858 .rpc_client = server->client,
5138fde0 1859 .rpc_message = &msg,
c970aa85
TM		 1860 .callback_ops = &nfs4_open_confirm_ops,
1861 .callback_data = data,
101070ca 1862 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1863 .flags = RPC_TASK_ASYNC,
1864 };
1da177e4
LT		 1865 int status;
1866
17ead6c8 1867 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1868 kref_get(&data->kref);
3e309914
TM		 1869 data->rpc_done = 0;
1870 data->rpc_status = 0;
5138fde0 1871 data->timestamp = jiffies;
e92c1e0d
BC		 1872 if (data->is_recover)
1873 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1874 task = rpc_run_task(&task_setup_data);
7a1218a2 1875 if (IS_ERR(task))
cdd4e68b 1876 return PTR_ERR(task);
cdd4e68b
TM		 1877 status = nfs4_wait_for_completion_rpc_task(task);
1878 if (status != 0) {
1879 data->cancelled = 1;
1880 smp_wmb();
1881 } else
1882 status = data->rpc_status;
e6b3c4db 1883 rpc_put_task(task);
1da177e4
LT		 1884 return status;
1885}
1886
24ac23ab 1887static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1888{
24ac23ab
TM		 1889 struct nfs4_opendata *data = calldata;
1890 struct nfs4_state_owner *sp = data->owner;
549b19cc 1891 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1892 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1893
24ac23ab 1894 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1895 goto out_wait;
aac00a8d
TM		 1896 /*
1897 * Check if we still need to send an OPEN call, or if we can use
1898 * a delegation instead.
1899 */
1900 if (data->state != NULL) {
1901 struct nfs_delegation *delegation;
1902
dc0b027d 1903 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1904 goto out_no_action;
aac00a8d
TM		 1905 rcu_read_lock();
1906 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1907 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1908 goto unlock_no_action;
aac00a8d
TM		 1909 rcu_read_unlock();
1910 }
95b72eb0 1911 /* Update client id. */
549b19cc 1912 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1913 switch (claim) {
1914 default:
1915 break;
8188df17
TM		 1916 case NFS4_OPEN_CLAIM_PREVIOUS:
1917 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1918 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1919 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1920 case NFS4_OPEN_CLAIM_FH:
1921 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1922 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1923 }
26e976a8 1924 data->timestamp = jiffies;
035168ab 1925 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1926 &data->o_arg.seq_args,
2240a9e2
TM		 1927 &data->o_res.seq_res,
1928 task) != 0)
1929 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1930
1931 /* Set the create mode (note dependency on the session type) */
1932 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1933 if (data->o_arg.open_flags & O_EXCL) {
1934 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1935 if (nfs4_has_persistent_session(clp))
1936 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1937 else if (clp->cl_mvops->minor_version > 0)
1938 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1939 }
6ee41268 1940 return;
652f89f6
TM		 1941unlock_no_action:
1942 rcu_read_unlock();
6ee41268
TM		 1943out_no_action:
1944 task->tk_action = NULL;
c8da19b9 1945out_wait:
b75ad4cd 1946 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1947}
1948
24ac23ab
TM		 1949static void nfs4_open_done(struct rpc_task *task, void *calldata)
1950{
1951 struct nfs4_opendata *data = calldata;
1da177e4 1952
24ac23ab 1953 data->rpc_status = task->tk_status;
d898528c 1954
14516c3a
TM		 1955 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1956 return;
d898528c 1957
24ac23ab 1958 if (task->tk_status == 0) {
807d66d8
TM		 1959 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1960 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1961 case S_IFREG:
1962 break;
1963 case S_IFLNK:
24ac23ab 1964 data->rpc_status = -ELOOP;
6f926b5b
TM		 1965 break;
1966 case S_IFDIR:
24ac23ab 1967 data->rpc_status = -EISDIR;
6f926b5b
TM		 1968 break;
1969 default:
24ac23ab 1970 data->rpc_status = -ENOTDIR;
807d66d8 1971 }
6f926b5b 1972 }
26e976a8 1973 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1974 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1975 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1976 }
3e309914 1977 data->rpc_done = 1;
24ac23ab 1978}
6f926b5b 1979
24ac23ab
TM		 1980static void nfs4_open_release(void *calldata)
1981{
1982 struct nfs4_opendata *data = calldata;
1983 struct nfs4_state *state = NULL;
1984
1985 /* If this request hasn't been cancelled, do nothing */
1986 if (data->cancelled == 0)
1987 goto out_free;
1988 /* In case of error, no cleanup! */
3e309914 1989 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1990 goto out_free;
1991 /* In case we need an open_confirm, no cleanup! */
1992 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1993 goto out_free;
24ac23ab 1994 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1995 if (!IS_ERR(state))
643168c2 1996 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1997out_free:
c6d00e63 1998 nfs4_opendata_put(data);
24ac23ab
TM		 1999}
2000
2001static const struct rpc_call_ops nfs4_open_ops = {
2002 .rpc_call_prepare = nfs4_open_prepare,
2003 .rpc_call_done = nfs4_open_done,
2004 .rpc_release = nfs4_open_release,
2005};
2006
b257957e 2007static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2008{
2b0143b5 2009 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2010 struct nfs_server *server = NFS_SERVER(dir);
2011 struct nfs_openargs *o_arg = &data->o_arg;
2012 struct nfs_openres *o_res = &data->o_res;
2013 struct rpc_task *task;
5138fde0
TM		 2014 struct rpc_message msg = {
2015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2016 .rpc_argp = o_arg,
2017 .rpc_resp = o_res,
2018 .rpc_cred = data->owner->so_cred,
2019 };
c970aa85
TM		 2020 struct rpc_task_setup task_setup_data = {
2021 .rpc_client = server->client,
5138fde0 2022 .rpc_message = &msg,
c970aa85
TM		 2023 .callback_ops = &nfs4_open_ops,
2024 .callback_data = data,
101070ca 2025 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2026 .flags = RPC_TASK_ASYNC,
2027 };
24ac23ab
TM		 2028 int status;
2029
a9c92d6b 2030 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2031 kref_get(&data->kref);
3e309914
TM		 2032 data->rpc_done = 0;
2033 data->rpc_status = 0;
2ced46c2 2034 data->cancelled = 0;
bdeca1b7
TM		 2035 data->is_recover = 0;
2036 if (isrecover) {
8fe72bac 2037 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2038 data->is_recover = 1;
2039 }
c970aa85 2040 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2041 if (IS_ERR(task))
2042 return PTR_ERR(task);
2043 status = nfs4_wait_for_completion_rpc_task(task);
2044 if (status != 0) {
2045 data->cancelled = 1;
2046 smp_wmb();
2047 } else
2048 status = data->rpc_status;
2049 rpc_put_task(task);
2050
2051 return status;
2052}
2053
2054static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2055{
2b0143b5 2056 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2057 struct nfs_openres *o_res = &data->o_res;
2058 int status;
2059
2060 status = nfs4_run_open_task(data, 1);
2061 if (status != 0 || !data->rpc_done)
2062 return status;
2063
6926afd1
TM		 2064 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2065
b257957e
AB		 2066 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2067 status = _nfs4_proc_open_confirm(data);
2068 if (status != 0)
2069 return status;
2070 }
2071
2072 return status;
2073}
2074
f3792d63
TM		 2075/*
2076 * Additional permission checks in order to distinguish between an
2077 * open for read, and an open for execute. This works around the
2078 * fact that NFSv4 OPEN treats read and execute permissions as being
2079 * the same.
2080 * Note that in the non-execute case, we want to turn off permission
2081 * checking if we just created a new file (POSIX open() semantics).
2082 */
6168f62c
WAA		 2083static int nfs4_opendata_access(struct rpc_cred *cred,
2084 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2085 struct nfs4_state *state, fmode_t fmode,
2086 int openflags)
6168f62c
WAA		 2087{
2088 struct nfs_access_entry cache;
2089 u32 mask;
2090
2091 /* access call failed or for some reason the server doesn't
2092 * support any access modes -- defer access call until later */
2093 if (opendata->o_res.access_supported == 0)
2094 return 0;
2095
2096 mask = 0;
f3792d63
TM		 2097 /*
2098 * Use openflags to check for exec, because fmode won't
2099 * always have FMODE_EXEC set when file open for exec.
2100 */
f8d9a897
WAA		 2101 if (openflags & __FMODE_EXEC) {
2102 /* ONLY check for exec rights */
2103 mask = MAY_EXEC;
f3792d63 2104 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2105 mask = MAY_READ;
6168f62c
WAA		 2106
2107 cache.cred = cred;
2108 cache.jiffies = jiffies;
2109 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2110 nfs_access_add_cache(state->inode, &cache);
2111
bbd3a8ee 2112 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2113 return 0;
2114
2115 /* even though OPEN succeeded, access is denied. Close the file */
2116 nfs4_close_state(state, fmode);
998f40b5 2117 return -EACCES;
6168f62c
WAA		 2118}
2119
b257957e
AB		 2120/*
2121 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2122 */
2123static int _nfs4_proc_open(struct nfs4_opendata *data)
2124{
2b0143b5 2125 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2126 struct nfs_server *server = NFS_SERVER(dir);
2127 struct nfs_openargs *o_arg = &data->o_arg;
2128 struct nfs_openres *o_res = &data->o_res;
2129 int status;
2130
2131 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2132 if (!data->rpc_done)
2133 return status;
2134 if (status != 0) {
2135 if (status == -NFS4ERR_BADNAME &&
2136 !(o_arg->open_flags & O_CREAT))
2137 return -ENOENT;
24ac23ab 2138 return status;
08ef7bd3 2139 }
24ac23ab 2140
6926afd1
TM		 2141 nfs_fattr_map_and_free_names(server, &data->f_attr);
2142
5bc2afc2 2143 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2144 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2145 if (o_arg->open_flags & O_EXCL)
2146 data->file_created = 1;
2147 else if (o_res->cinfo.before != o_res->cinfo.after)
2148 data->file_created = 1;
2149 }
0df5dd4a
TM		 2150 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2151 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2152 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2153 status = _nfs4_proc_open_confirm(data);
1da177e4 2154 if (status != 0)
24ac23ab 2155 return status;
1da177e4
LT		 2156 }
2157 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2158 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2159 return 0;
1da177e4
LT		 2160}
2161
d83217c1
AA		 2162static int nfs4_recover_expired_lease(struct nfs_server *server)
2163{
2164 return nfs4_client_recover_expired_lease(server->nfs_client);
2165}
2166
1da177e4
LT		 2167/*
2168 * OPEN_EXPIRED:
2169 * reclaim state on the server after a network partition.
2170 * Assumes caller holds the appropriate lock
2171 */
539cd03a 2172static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2173{
e56e0b78 2174 struct nfs4_opendata *opendata;
864472e9 2175 int ret;
1da177e4 2176
4a1c0893 2177 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2178 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2179 if (IS_ERR(opendata))
2180 return PTR_ERR(opendata);
864472e9 2181 ret = nfs4_open_recover(opendata, state);
35d05778 2182 if (ret == -ESTALE)
3d4ff43d 2183 d_drop(ctx->dentry);
c6d00e63 2184 nfs4_opendata_put(opendata);
864472e9 2185 return ret;
1da177e4
LT		 2186}
2187
a9ed2e25 2188static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2189{
539cd03a 2190 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2191 struct nfs4_exception exception = { };
2192 int err;
2193
2194 do {
539cd03a 2195 err = _nfs4_open_expired(ctx, state);
42113a75 2196 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2197 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2198 continue;
a9ed2e25
TM		 2199 switch (err) {
2200 default:
2201 goto out;
2202 case -NFS4ERR_GRACE:
2203 case -NFS4ERR_DELAY:
2204 nfs4_handle_exception(server, err, &exception);
2205 err = 0;
2206 }
202b50dc 2207 } while (exception.retry);
a9ed2e25 2208out:
202b50dc
TM		 2209 return err;
2210}
2211
1da177e4
LT		 2212static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2213{
1da177e4 2214 struct nfs_open_context *ctx;
864472e9 2215 int ret;
1da177e4 2216
864472e9
TM		 2217 ctx = nfs4_state_find_open_context(state);
2218 if (IS_ERR(ctx))
91876b13 2219 return -EAGAIN;
539cd03a 2220 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2221 put_nfs_open_context(ctx);
2222 return ret;
1da177e4
LT		 2223}
2224
4dfd4f7a
TM		 2225static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2226{
2227 nfs_remove_bad_delegation(state->inode);
2228 write_seqlock(&state->seqlock);
2229 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2230 write_sequnlock(&state->seqlock);
2231 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2232}
2233
2234static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2235{
2236 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2237 nfs_finish_clear_delegation_stateid(state);
2238}
2239
2240static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2241{
2242 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2243 nfs40_clear_delegation_stateid(state);
2244 return nfs4_open_expired(sp, state);
2245}
2246
f062eb6c 2247#if defined(CONFIG_NFS_V4_1)
0c116cad 2248static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2249{
f062eb6c 2250 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2251 nfs4_stateid stateid;
ab7cb0df 2252 struct nfs_delegation *delegation;
0c116cad
TM		 2253 struct rpc_cred *cred;
2254 int status;
3e60ffdd 2255
ab7cb0df
TM		 2256 /* Get the delegation credential for use by test/free_stateid */
2257 rcu_read_lock();
2258 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2259 if (delegation == NULL) {
ab7cb0df 2260 rcu_read_unlock();
0c116cad
TM		 2261 return;
2262 }
2263
2264 nfs4_stateid_copy(&stateid, &delegation->stateid);
2265 cred = get_rpccred(delegation->cred);
2266 rcu_read_unlock();
2267 status = nfs41_test_stateid(server, &stateid, cred);
2268 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2269
3e60ffdd
CL		 2270 if (status != NFS_OK) {
2271 /* Free the stateid unless the server explicitly
2272 * informs us the stateid is unrecognized. */
2273 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2274 nfs41_free_stateid(server, &stateid, cred);
2275 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2276 }
ab7cb0df 2277
0c116cad 2278 put_rpccred(cred);
3e60ffdd
CL		 2279}
2280
2281/**
2282 * nfs41_check_open_stateid - possibly free an open stateid
2283 *
2284 * @state: NFSv4 state for an inode
2285 *
2286 * Returns NFS_OK if recovery for this stateid is now finished.
2287 * Otherwise a negative NFS4ERR value is returned.
2288 */
2289static int nfs41_check_open_stateid(struct nfs4_state *state)
2290{
2291 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2292 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2293 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2294 int status;
2295
2296 /* If a state reset has been done, test_stateid is unneeded */
2297 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2298 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2299 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2300 return -NFS4ERR_BAD_STATEID;
2301
ab7cb0df 2302 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2303 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2304 if (status != NFS_OK) {
2305 /* Free the stateid unless the server explicitly
2306 * informs us the stateid is unrecognized. */
2307 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2308 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2309
2310 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2311 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2312 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2313 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2314 }
2315 return status;
2316}
2317
2318static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2319{
eb64cf96 2320 int status;
b01dd1d8 2321
0c116cad 2322 nfs41_check_delegation_stateid(state);
3e60ffdd 2323 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2324 if (status != NFS_OK)
2325 status = nfs4_open_expired(sp, state);
2326 return status;
f062eb6c
BS		 2327}
2328#endif
2329
aa53ed54
JL		 2330/*
2331 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2332 * fields corresponding to attributes that were used to store the verifier.
2333 * Make sure we clobber those fields in the later setattr call
2334 */
5334c5bd
KM		 2335static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2336 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2337{
5334c5bd
KM		 2338 const u32 *attrset = opendata->o_res.attrset;
2339
2340 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2341 !(sattr->ia_valid & ATTR_ATIME_SET))
2342 sattr->ia_valid |= ATTR_ATIME;
2343
5334c5bd 2344 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2345 !(sattr->ia_valid & ATTR_MTIME_SET))
2346 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2347
2348 /* Except MODE, it seems harmless of setting twice. */
2349 if ((attrset[1] & FATTR4_WORD1_MODE))
2350 sattr->ia_valid &= ~ATTR_MODE;
2351
2352 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2353 *label = NULL;
aa53ed54
JL		 2354}
2355
c21443c2
TM		 2356static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2357 fmode_t fmode,
2358 int flags,
3efb9722 2359 struct nfs_open_context *ctx)
c21443c2
TM		 2360{
2361 struct nfs4_state_owner *sp = opendata->owner;
2362 struct nfs_server *server = sp->so_server;
275bb307 2363 struct dentry *dentry;
c21443c2
TM		 2364 struct nfs4_state *state;
2365 unsigned int seq;
2366 int ret;
2367
2368 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2369
2370 ret = _nfs4_proc_open(opendata);
dca78001 2371 if (ret != 0)
c21443c2
TM		 2372 goto out;
2373
2374 state = nfs4_opendata_to_nfs4_state(opendata);
2375 ret = PTR_ERR(state);
2376 if (IS_ERR(state))
2377 goto out;
2378 if (server->caps & NFS_CAP_POSIX_LOCK)
2379 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2380
275bb307 2381 dentry = opendata->dentry;
2b0143b5 2382 if (d_really_is_negative(dentry)) {
275bb307
TM		 2383 /* FIXME: Is this d_drop() ever needed? */
2384 d_drop(dentry);
2385 dentry = d_add_unique(dentry, igrab(state->inode));
2386 if (dentry == NULL) {
2387 dentry = opendata->dentry;
2388 } else if (dentry != ctx->dentry) {
2389 dput(ctx->dentry);
2390 ctx->dentry = dget(dentry);
2391 }
2392 nfs_set_verifier(dentry,
2b0143b5 2393 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2394 }
2395
c21443c2
TM		 2396 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2397 if (ret != 0)
2398 goto out;
2399
3efb9722 2400 ctx->state = state;
2b0143b5 2401 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2402 nfs_inode_attach_open_context(ctx);
2403 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2404 nfs4_schedule_stateid_recovery(server, state);
2405 }
c21443c2
TM		 2406out:
2407 return ret;
2408}
2409
1da177e4 2410/*
24ac23ab 2411 * Returns a referenced nfs4_state
1da177e4 2412 */
82be417a 2413static int _nfs4_do_open(struct inode *dir,
4197a055 2414 struct nfs_open_context *ctx,
82be417a
AA		 2415 int flags,
2416 struct iattr *sattr,
5bc2afc2
TM		 2417 struct nfs4_label *label,
2418 int *opened)
1da177e4
LT		 2419{
2420 struct nfs4_state_owner *sp;
2421 struct nfs4_state *state = NULL;
2422 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2423 struct nfs4_opendata *opendata;
4197a055
TM		 2424 struct dentry *dentry = ctx->dentry;
2425 struct rpc_cred *cred = ctx->cred;
2426 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2427 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2428 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2429 struct nfs4_label *olabel = NULL;
aac00a8d 2430 int status;
1da177e4
LT		 2431
2432 /* Protect against reboot recovery conflicts */
1da177e4 2433 status = -ENOMEM;
d1e284d5
TM		 2434 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2435 if (sp == NULL) {
1da177e4
LT		 2436 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2437 goto out_err;
2438 }
58d9714a
TM		 2439 status = nfs4_recover_expired_lease(server);
2440 if (status != 0)
b4454fe1 2441 goto err_put_state_owner;
2b0143b5
DH		 2442 if (d_really_is_positive(dentry))
2443 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2444 status = -ENOMEM;
2b0143b5 2445 if (d_really_is_positive(dentry))
49f9a0fa 2446 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2447 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2448 label, claim, GFP_KERNEL);
e56e0b78 2449 if (opendata == NULL)
95d35cb4 2450 goto err_put_state_owner;
1da177e4 2451
14c43f76
DQ		 2452 if (label) {
2453 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2454 if (IS_ERR(olabel)) {
2455 status = PTR_ERR(olabel);
2456 goto err_opendata_put;
2457 }
2458 }
2459
e911b815
TM		 2460 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2461 if (!opendata->f_attr.mdsthreshold) {
2462 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2463 if (!opendata->f_attr.mdsthreshold)
2464 goto err_free_label;
2465 }
1549210f 2466 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2467 }
2b0143b5
DH		 2468 if (d_really_is_positive(dentry))
2469 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2470
3efb9722 2471 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2472 if (status != 0)
14c43f76 2473 goto err_free_label;
3efb9722 2474 state = ctx->state;
6168f62c 2475
efcbc04e 2476 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2477 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2478 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2479
2480 nfs_fattr_init(opendata->o_res.f_attr);
2481 status = nfs4_do_setattr(state->inode, cred,
2482 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2483 state, label, olabel);
2484 if (status == 0) {
f044636d
TM		 2485 nfs_setattr_update_inode(state->inode, sattr,
2486 opendata->o_res.f_attr);
aa9c2669 2487 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2488 }
0ab64e0e 2489 }
c5c3fb5f 2490 if (opened && opendata->file_created)
5bc2afc2 2491 *opened |= FILE_CREATED;
82be417a 2492
e911b815 2493 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2494 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2495 opendata->f_attr.mdsthreshold = NULL;
2496 }
82be417a 2497
14c43f76
DQ		 2498 nfs4_label_free(olabel);
2499
c6d00e63 2500 nfs4_opendata_put(opendata);
1da177e4 2501 nfs4_put_state_owner(sp);
1da177e4 2502 return 0;
14c43f76
DQ		 2503err_free_label:
2504 nfs4_label_free(olabel);
c6d00e63
TM		 2505err_opendata_put:
2506 nfs4_opendata_put(opendata);
e56e0b78
TM		 2507err_put_state_owner:
2508 nfs4_put_state_owner(sp);
1da177e4 2509out_err:
1da177e4
LT		 2510 return status;
2511}
2512
2513
82be417a 2514static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2515 struct nfs_open_context *ctx,
82be417a
AA		 2516 int flags,
2517 struct iattr *sattr,
5bc2afc2
TM		 2518 struct nfs4_label *label,
2519 int *opened)
1da177e4 2520{
49f9a0fa 2521 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2522 struct nfs4_exception exception = { };
2523 struct nfs4_state *res;
2524 int status;
2525
2526 do {
5bc2afc2 2527 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2528 res = ctx->state;
42113a75 2529 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2530 if (status == 0)
2531 break;
2532 /* NOTE: BAD_SEQID means the server and client disagree about the
2533 * book-keeping w.r.t. state-changing operations
2534 * (OPEN/CLOSE/LOCK/LOCKU...)
2535 * It is actually a sign of a bug on the client or on the server.
2536 *
2537 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2538 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2539 * have unhashed the old state_owner for us, and that we can
2540 * therefore safely retry using a new one. We should still warn
2541 * the user though...
2542 */
2543 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2544 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2545 " returned a bad sequence-id error!\n",
2546 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2547 exception.retry = 1;
2548 continue;
2549 }
550f5747
TM		 2550 /*
2551 * BAD_STATEID on OPEN means that the server cancelled our
2552 * state before it received the OPEN_CONFIRM.
2553 * Recover by retrying the request as per the discussion
2554 * on Page 181 of RFC3530.
2555 */
2556 if (status == -NFS4ERR_BAD_STATEID) {
2557 exception.retry = 1;
2558 continue;
2559 }
aac00a8d
TM		 2560 if (status == -EAGAIN) {
2561 /* We must have found a delegation */
2562 exception.retry = 1;
2563 continue;
2564 }
49f9a0fa
TM		 2565 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2566 continue;
2567 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2568 status, &exception));
2569 } while (exception.retry);
2570 return res;
2571}
2572
659bfcd6
TM		 2573static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2574 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2575 struct nfs4_state *state, struct nfs4_label *ilabel,
2576 struct nfs4_label *olabel)
1da177e4 2577{
3e4f6290 2578 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2579 struct nfs_setattrargs arg = {
3e4f6290 2580 .fh = NFS_FH(inode),
1da177e4
LT		 2581 .iap = sattr,
2582 .server = server,
2583 .bitmask = server->attr_bitmask,
1775fd3e 2584 .label = ilabel,
1da177e4
LT		 2585 };
2586 struct nfs_setattrres res = {
2587 .fattr = fattr,
1775fd3e 2588 .label = olabel,
1da177e4
LT		 2589 .server = server,
2590 };
2591 struct rpc_message msg = {
659bfcd6
TM		 2592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2593 .rpc_argp = &arg,
2594 .rpc_resp = &res,
2595 .rpc_cred = cred,
1da177e4 2596 };
26e976a8 2597 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2598 fmode_t fmode;
2599 bool truncate;
65e4308d 2600 int status;
1da177e4 2601
aa9c2669
DQ		 2602 arg.bitmask = nfs4_bitmask(server, ilabel);
2603 if (ilabel)
2604 arg.bitmask = nfs4_bitmask(server, olabel);
2605
0e574af1 2606 nfs_fattr_init(fattr);
1da177e4 2607
ee3ae84e
TM		 2608 /* Servers should only apply open mode checks for file size changes */
2609 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2610 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2611
2612 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2613 /* Use that stateid */
0418dae1 2614 } else if (truncate && state != NULL) {
2a369153
TM		 2615 struct nfs_lockowner lockowner = {
2616 .l_owner = current->files,
2617 .l_pid = current->tgid,
2618 };
0418dae1
TM		 2619 if (!nfs4_valid_open_stateid(state))
2620 return -EBADF;
2621 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2622 &lockowner) == -EIO)
2623 return -EBADF;
08e9eac4 2624 } else
f597c537 2625 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2626
7c513058 2627 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2628 if (status == 0 && state != NULL)
2629 renew_lease(server, timestamp);
65e4308d 2630 return status;
1da177e4
LT		 2631}
2632
659bfcd6
TM		 2633static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2634 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2635 struct nfs4_state *state, struct nfs4_label *ilabel,
2636 struct nfs4_label *olabel)
1da177e4 2637{
3e4f6290 2638 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2639 struct nfs4_exception exception = {
2640 .state = state,
3114ea7a 2641 .inode = inode,
a1d0b5ee 2642 };
1da177e4
LT		 2643 int err;
2644 do {
1775fd3e 2645 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2646 trace_nfs4_setattr(inode, err);
451146be
TM		 2647 switch (err) {
2648 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2649 if (!(sattr->ia_valid & ATTR_SIZE)) {
2650 pr_warn_once("NFSv4: server %s is incorrectly "
2651 "applying open mode checks to "
2652 "a SETATTR that is not "
2653 "changing file size.\n",
2654 server->nfs_client->cl_hostname);
2655 }
451146be
TM		 2656 if (state && !(state->state & FMODE_WRITE)) {
2657 err = -EBADF;
2658 if (sattr->ia_valid & ATTR_OPEN)
2659 err = -EACCES;
2660 goto out;
2661 }
2662 }
2663 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2664 } while (exception.retry);
451146be 2665out:
1da177e4
LT		 2666 return err;
2667}
2668
500d701f
PT		 2669static bool
2670nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2671{
2672 if (inode == NULL || !nfs_have_layout(inode))
2673 return false;
2674
2675 return pnfs_wait_on_layoutreturn(inode, task);
2676}
2677
1da177e4
LT		 2678struct nfs4_closedata {
2679 struct inode *inode;
2680 struct nfs4_state *state;
2681 struct nfs_closeargs arg;
2682 struct nfs_closeres res;
516a6af6 2683 struct nfs_fattr fattr;
26e976a8 2684 unsigned long timestamp;
f7e8917a
FI		 2685 bool roc;
2686 u32 roc_barrier;
1da177e4
LT		 2687};
2688
963d8fe5 2689static void nfs4_free_closedata(void *data)
9512135d 2690{
963d8fe5
TM		 2691 struct nfs4_closedata *calldata = data;
2692 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2693 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2694
f7e8917a
FI		 2695 if (calldata->roc)
2696 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2697 nfs4_put_open_state(calldata->state);
2698 nfs_free_seqid(calldata->arg.seqid);
9512135d 2699 nfs4_put_state_owner(sp);
322b2b90 2700 nfs_sb_deactive(sb);
9512135d
TM		 2701 kfree(calldata);
2702}
2703
963d8fe5 2704static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2705{
963d8fe5 2706 struct nfs4_closedata *calldata = data;
1da177e4 2707 struct nfs4_state *state = calldata->state;
1da177e4 2708 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2709 nfs4_stateid *res_stateid = NULL;
1da177e4 2710
a3ca5651 2711 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2712 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2713 return;
42113a75 2714 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2715 /* hmm. we are done with the inode, and in the process of freeing
2716 * the state_owner. we keep this around to process errors
2717 */
1da177e4
LT		 2718 switch (task->tk_status) {
2719 case 0:
412f6c4c 2720 res_stateid = &calldata->res.stateid;
3c13cb5b 2721 if (calldata->roc)
f7e8917a
FI		 2722 pnfs_roc_set_barrier(state->inode,
2723 calldata->roc_barrier);
26e976a8 2724 renew_lease(server, calldata->timestamp);
412f6c4c 2725 break;
69794ad7 2726 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2727 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2728 case -NFS4ERR_OLD_STATEID:
2729 case -NFS4ERR_BAD_STATEID:
1da177e4 2730 case -NFS4ERR_EXPIRED:
566fcec6 2731 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2732 &state->open_stateid)) {
566fcec6
TM		 2733 rpc_restart_call_prepare(task);
2734 goto out_release;
2735 }
dc0b027d 2736 if (calldata->arg.fmode == 0)
9e33bed5 2737 break;
1da177e4 2738 default:
8478eaa1 2739 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2740 rpc_restart_call_prepare(task);
69794ad7
TM		 2741 goto out_release;
2742 }
1da177e4 2743 }
4a1e2feb
TM		 2744 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2745 res_stateid, calldata->arg.fmode);
69794ad7 2746out_release:
72211dbe 2747 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2748 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2749 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2750}
2751
4ce70ada 2752static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2753{
4ce70ada 2754 struct nfs4_closedata *calldata = data;
9512135d 2755 struct nfs4_state *state = calldata->state;
7fdab069 2756 struct inode *inode = calldata->inode;
aee7af35 2757 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2758 int call_close = 0;
9512135d 2759
a3ca5651 2760 dprintk("%s: begin!\n", __func__);
963d8fe5 2761 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2762 goto out_wait;
003707c7 2763
88069f77 2764 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2765 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2766 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2767 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2768 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2769 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2770 /* Calculate the change in open mode */
cd9288ff 2771 calldata->arg.fmode = 0;
e7616923 2772 if (state->n_rdwr == 0) {
cd9288ff
TM		 2773 if (state->n_rdonly == 0)
2774 call_close |= is_rdonly;
2775 else if (is_rdonly)
2776 calldata->arg.fmode |= FMODE_READ;
2777 if (state->n_wronly == 0)
2778 call_close |= is_wronly;
2779 else if (is_wronly)
2780 calldata->arg.fmode |= FMODE_WRITE;
2781 } else if (is_rdwr)
2782 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2783
2784 if (calldata->arg.fmode == 0)
2785 call_close |= is_rdwr;
2786
5d422301
TM		 2787 if (!nfs4_valid_open_stateid(state))
2788 call_close = 0;
4cecb76f 2789 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2790
2791 if (!call_close) {
963d8fe5 2792 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2793 goto out_no_action;
9512135d 2794 }
88069f77 2795
500d701f
PT		 2796 if (nfs4_wait_on_layoutreturn(inode, task)) {
2797 nfs_release_seqid(calldata->arg.seqid);
2798 goto out_wait;
2799 }
2800
3c13cb5b 2801 if (calldata->arg.fmode == 0)
88069f77 2802 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2803 if (calldata->roc)
2804 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2805
6ae37339
TM		 2806 calldata->arg.share_access =
2807 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2808 calldata->arg.fmode, 0);
88069f77 2809
516a6af6 2810 nfs_fattr_init(calldata->res.fattr);
26e976a8 2811 calldata->timestamp = jiffies;
7fdab069 2812 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2813 &calldata->arg.seq_args,
2814 &calldata->res.seq_res,
2240a9e2
TM		 2815 task) != 0)
2816 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2817 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2818 return;
2819out_no_action:
2820 task->tk_action = NULL;
2821out_wait:
2822 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2823}
2824
963d8fe5 2825static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2826 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2827 .rpc_call_done = nfs4_close_done,
2828 .rpc_release = nfs4_free_closedata,
2829};
2830
fe08c546
PT		 2831static bool nfs4_roc(struct inode *inode)
2832{
40dd4b7a 2833 if (!nfs_have_layout(inode))
fe08c546 2834 return false;
fe08c546
PT		 2835 return pnfs_roc(inode);
2836}
2837
1da177e4
LT		 2838/*
2839 * It is possible for data to be read/written from a mem-mapped file
2840 * after the sys_close call (which hits the vfs layer as a flush).
2841 * This means that we can't safely call nfsv4 close on a file until
2842 * the inode is cleared. This in turn means that we are not good
2843 * NFSv4 citizens - we do not indicate to the server to update the file's
2844 * share state even when we are done with one of the three share
2845 * stateid's in the inode.
2846 *
2847 * NOTE: Caller must be holding the sp->so_owner semaphore!
2848 */
1f7977c1 2849int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2850{
4a35bd41 2851 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2852 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2853 struct nfs4_closedata *calldata;
b39e625b
TM		 2854 struct nfs4_state_owner *sp = state->owner;
2855 struct rpc_task *task;
5138fde0
TM		 2856 struct rpc_message msg = {
2857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2858 .rpc_cred = state->owner->so_cred,
2859 };
c970aa85
TM		 2860 struct rpc_task_setup task_setup_data = {
2861 .rpc_client = server->client,
5138fde0 2862 .rpc_message = &msg,
c970aa85 2863 .callback_ops = &nfs4_close_ops,
101070ca 2864 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2865 .flags = RPC_TASK_ASYNC,
2866 };
9512135d 2867 int status = -ENOMEM;
1da177e4 2868
fa940720
WAA		 2869 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2870 &task_setup_data.rpc_client, &msg);
2871
8535b2be 2872 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2873 if (calldata == NULL)
9512135d 2874 goto out;
a9c92d6b 2875 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2876 calldata->inode = state->inode;
1da177e4 2877 calldata->state = state;
4a35bd41 2878 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2879 /* Serialization for the sequence id */
63f5f796
TM		 2880 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2881 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2882 if (IS_ERR(calldata->arg.seqid))
9512135d 2883 goto out_free_calldata;
dc0b027d 2884 calldata->arg.fmode = 0;
a65318bf 2885 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2886 calldata->res.fattr = &calldata->fattr;
c1d51931 2887 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2888 calldata->res.server = server;
fe08c546 2889 calldata->roc = nfs4_roc(state->inode);
643168c2 2890 nfs_sb_active(calldata->inode->i_sb);
9512135d 2891
1174dd1f
TM		 2892 msg.rpc_argp = &calldata->arg;
2893 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2894 task_setup_data.callback_data = calldata;
2895 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2896 if (IS_ERR(task))
2897 return PTR_ERR(task);
a49c3c77
TM		 2898 status = 0;
2899 if (wait)
2900 status = rpc_wait_for_completion_task(task);
b39e625b 2901 rpc_put_task(task);
a49c3c77 2902 return status;
9512135d
TM		 2903out_free_calldata:
2904 kfree(calldata);
2905out:
b39e625b
TM		 2906 nfs4_put_open_state(state);
2907 nfs4_put_state_owner(sp);
9512135d 2908 return status;
1da177e4
LT		 2909}
2910
2b484297 2911static struct inode *
5bc2afc2
TM		 2912nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2913 int open_flags, struct iattr *attr, int *opened)
1da177e4 2914{
1da177e4 2915 struct nfs4_state *state;
aa9c2669
DQ		 2916 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2917
2918 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2919
565277f6 2920 /* Protect against concurrent sillydeletes */
5bc2afc2 2921 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2922
2923 nfs4_label_release_security(label);
2924
f46e0bd3
TM		 2925 if (IS_ERR(state))
2926 return ERR_CAST(state);
275bb307 2927 return state->inode;
1da177e4
LT		 2928}
2929
1185a552 2930static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2931{
2932 if (ctx->state == NULL)
2933 return;
2934 if (is_sync)
643168c2 2935 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2936 else
643168c2 2937 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2938}
1da177e4 2939
b944dba3
TM		 2940#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2941#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2942#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2943
1da177e4
LT		 2944static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2945{
8c61282f 2946 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2947 struct nfs4_server_caps_arg args = {
2948 .fhandle = fhandle,
8c61282f 2949 .bitmask = bitmask,
43652ad5 2950 };
1da177e4
LT		 2951 struct nfs4_server_caps_res res = {};
2952 struct rpc_message msg = {
2953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2954 .rpc_argp = &args,
1da177e4
LT		 2955 .rpc_resp = &res,
2956 };
2957 int status;
2958
8c61282f
KM		 2959 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2960 FATTR4_WORD0_FH_EXPIRE_TYPE |
2961 FATTR4_WORD0_LINK_SUPPORT |
2962 FATTR4_WORD0_SYMLINK_SUPPORT |
2963 FATTR4_WORD0_ACLSUPPORT;
2964 if (minorversion)
2965 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2966
7c513058 2967 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2968 if (status == 0) {
b944dba3 2969 /* Sanity check the server answers */
8c61282f 2970 switch (minorversion) {
b944dba3
TM		 2971 case 0:
2972 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2973 res.attr_bitmask[2] = 0;
2974 break;
2975 case 1:
2976 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2977 break;
2978 case 2:
2979 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2980 }
1da177e4 2981 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2982 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2983 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2984 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2985 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2986 NFS_CAP_CTIME|NFS_CAP_MTIME|
2987 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2988 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2989 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2990 server->caps |= NFS_CAP_ACLS;
2991 if (res.has_links != 0)
2992 server->caps |= NFS_CAP_HARDLINKS;
2993 if (res.has_symlinks != 0)
2994 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2995 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2996 server->caps |= NFS_CAP_FILEID;
2997 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2998 server->caps |= NFS_CAP_MODE;
2999 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3000 server->caps |= NFS_CAP_NLINK;
3001 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3002 server->caps |= NFS_CAP_OWNER;
3003 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3004 server->caps |= NFS_CAP_OWNER_GROUP;
3005 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3006 server->caps |= NFS_CAP_ATIME;
3007 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3008 server->caps |= NFS_CAP_CTIME;
3009 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3010 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3011#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3012 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3013 server->caps |= NFS_CAP_SECURITY_LABEL;
3014#endif
3015 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3016 sizeof(server->attr_bitmask));
b944dba3 3017 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3018
a65318bf
TM		 3019 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3020 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3021 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3022 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3023 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3024 sizeof(server->exclcreat_bitmask));
1da177e4 3025 server->acl_bitmask = res.acl_bitmask;
264e6351 3026 server->fh_expire_type = res.fh_expire_type;
1da177e4 3027 }
cccef3b9 3028
1da177e4
LT		 3029 return status;
3030}
3031
55a97593 3032int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3033{
3034 struct nfs4_exception exception = { };
3035 int err;
3036 do {
3037 err = nfs4_handle_exception(server,
3038 _nfs4_server_capabilities(server, fhandle),
3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
3044static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3045 struct nfs_fsinfo *info)
3046{
aa9c2669 3047 u32 bitmask[3];
1da177e4 3048 struct nfs4_lookup_root_arg args = {
aa9c2669 3049 .bitmask = bitmask,
1da177e4
LT		 3050 };
3051 struct nfs4_lookup_res res = {
3052 .server = server,
0e574af1 3053 .fattr = info->fattr,
1da177e4
LT		 3054 .fh = fhandle,
3055 };
3056 struct rpc_message msg = {
3057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3058 .rpc_argp = &args,
3059 .rpc_resp = &res,
3060 };
008f55d0 3061
aa9c2669
DQ		 3062 bitmask[0] = nfs4_fattr_bitmap[0];
3063 bitmask[1] = nfs4_fattr_bitmap[1];
3064 /*
3065 * Process the label in the upcoming getfattr
3066 */
3067 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3068
0e574af1 3069 nfs_fattr_init(info->fattr);
7c513058 3070 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3071}
3072
3073static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3074 struct nfs_fsinfo *info)
3075{
3076 struct nfs4_exception exception = { };
3077 int err;
3078 do {
fb8a5ba8 3079 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3080 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3081 switch (err) {
3082 case 0:
3083 case -NFS4ERR_WRONGSEC:
05e9cfb4 3084 goto out;
fb8a5ba8
BS		 3085 default:
3086 err = nfs4_handle_exception(server, err, &exception);
3087 }
1da177e4 3088 } while (exception.retry);
05e9cfb4 3089out:
1da177e4
LT		 3090 return err;
3091}
3092
8f70e95f
BS		 3093static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3094 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3095{
c2190661
TM		 3096 struct rpc_auth_create_args auth_args = {
3097 .pseudoflavor = flavor,
3098 };
8f70e95f
BS		 3099 struct rpc_auth *auth;
3100 int ret;
3101
c2190661 3102 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3103 if (IS_ERR(auth)) {
75bc8821 3104 ret = -EACCES;
8f70e95f
BS		 3105 goto out;
3106 }
3107 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3108out:
3109 return ret;
3110}
3111
9a744ba3
CL		 3112/*
3113 * Retry pseudoroot lookup with various security flavors. We do this when:
3114 *
3115 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3116 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3117 *
3118 * Returns zero on success, or a negative NFS4ERR value, or a
3119 * negative errno value.
3120 */
801a16dc 3121static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3122 struct nfs_fsinfo *info)
1da177e4 3123{
9a744ba3
CL		 3124 /* Per 3530bis 15.33.5 */
3125 static const rpc_authflavor_t flav_array[] = {
3126 RPC_AUTH_GSS_KRB5P,
3127 RPC_AUTH_GSS_KRB5I,
3128 RPC_AUTH_GSS_KRB5,
c4eafe11 3129 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3130 RPC_AUTH_NULL,
3131 };
3132 int status = -EPERM;
3133 size_t i;
6a1a1e34 3134
4d4b69dd
WAA		 3135 if (server->auth_info.flavor_len > 0) {
3136 /* try each flavor specified by user */
3137 for (i = 0; i < server->auth_info.flavor_len; i++) {
3138 status = nfs4_lookup_root_sec(server, fhandle, info,
3139 server->auth_info.flavors[i]);
3140 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3141 continue;
3142 break;
3143 }
3144 } else {
3145 /* no flavors specified by user, try default list */
3146 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3147 status = nfs4_lookup_root_sec(server, fhandle, info,
3148 flav_array[i]);
3149 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3150 continue;
3151 break;
3152 }
8f70e95f 3153 }
9a744ba3 3154
fb8a5ba8
BS		 3155 /*
3156 * -EACCESS could mean that the user doesn't have correct permissions
3157 * to access the mount. It could also mean that we tried to mount
3158 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3159 * existing mount programs don't handle -EACCES very well so it should
3160 * be mapped to -EPERM instead.
3161 */
3162 if (status == -EACCES)
3163 status = -EPERM;
801a16dc
BS		 3164 return status;
3165}
3166
2ed4b95b
CL		 3167static int nfs4_do_find_root_sec(struct nfs_server *server,
3168 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3169{
3170 int mv = server->nfs_client->cl_minorversion;
3171 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3172}
3173
3174/**
3175 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3176 * @server: initialized nfs_server handle
3177 * @fhandle: we fill in the pseudo-fs root file handle
3178 * @info: we fill in an FSINFO struct
5e6b1990 3179 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3180 *
3181 * Returns zero on success, or a negative errno.
801a16dc 3182 */
3028eb2b 3183int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3184 struct nfs_fsinfo *info,
3185 bool auth_probe)
801a16dc 3186{
c7757074 3187 int status = 0;
2ed4b95b 3188
c7757074 3189 if (!auth_probe)
5e6b1990 3190 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3191
3192 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3193 status = nfs4_do_find_root_sec(server, fhandle, info);
3194
1da177e4
LT		 3195 if (status == 0)
3196 status = nfs4_server_capabilities(server, fhandle);
3197 if (status == 0)
3198 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3199
c12e87f4 3200 return nfs4_map_errors(status);
1da177e4
LT		 3201}
3202
bae36241
BS		 3203static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3204 struct nfs_fsinfo *info)
3205{
3206 int error;
3207 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3208 struct nfs4_label *label = NULL;
bae36241
BS		 3209
3210 error = nfs4_server_capabilities(server, mntfh);
3211 if (error < 0) {
3212 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3213 return error;
3214 }
3215
14c43f76
DQ		 3216 label = nfs4_label_alloc(server, GFP_KERNEL);
3217 if (IS_ERR(label))
3218 return PTR_ERR(label);
3219
1775fd3e 3220 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3221 if (error < 0) {
3222 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3223 goto err_free_label;
bae36241
BS		 3224 }
3225
3226 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3227 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3228 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3229
14c43f76
DQ		 3230err_free_label:
3231 nfs4_label_free(label);
3232
bae36241
BS		 3233 return error;
3234}
3235
6b97fd3d
MN		 3236/*
3237 * Get locations and (maybe) other attributes of a referral.
3238 * Note that we'll actually follow the referral later when
3239 * we detect fsid mismatch in inode revalidation
3240 */
f05d147f
BS		 3241static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3242 const struct qstr *name, struct nfs_fattr *fattr,
3243 struct nfs_fh *fhandle)
6b97fd3d
MN		 3244{
3245 int status = -ENOMEM;
3246 struct page *page = NULL;
3247 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3248
3249 page = alloc_page(GFP_KERNEL);
3250 if (page == NULL)
3251 goto out;
3252 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3253 if (locations == NULL)
3254 goto out;
3255
f05d147f 3256 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3257 if (status != 0)
3258 goto out;
519ae255
CL		 3259
3260 /*
3261 * If the fsid didn't change, this is a migration event, not a
3262 * referral. Cause us to drop into the exception handler, which
3263 * will kick off migration recovery.
3264 */
6b97fd3d 3265 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3266 dprintk("%s: server did not return a different fsid for"
3267 " a referral at %s\n", __func__, name->name);
519ae255 3268 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3269 goto out;
3270 }
533eb461
AA		 3271 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3272 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3273
533eb461 3274 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3275 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3276 memset(fhandle, 0, sizeof(struct nfs_fh));
3277out:
3278 if (page)
3279 __free_page(page);
5d7ca35a 3280 kfree(locations);
6b97fd3d
MN		 3281 return status;
3282}
3283
1775fd3e
DQ		 3284static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3285 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3286{
3287 struct nfs4_getattr_arg args = {
3288 .fh = fhandle,
3289 .bitmask = server->attr_bitmask,
3290 };
3291 struct nfs4_getattr_res res = {
3292 .fattr = fattr,
1775fd3e 3293 .label = label,
1da177e4
LT		 3294 .server = server,
3295 };
3296 struct rpc_message msg = {
3297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3298 .rpc_argp = &args,
3299 .rpc_resp = &res,
3300 };
aa9c2669
DQ		 3301
3302 args.bitmask = nfs4_bitmask(server, label);
3303
0e574af1 3304 nfs_fattr_init(fattr);
7c513058 3305 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3306}
3307
1775fd3e
DQ		 3308static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3309 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3310{
3311 struct nfs4_exception exception = { };
3312 int err;
3313 do {
b5f875a9
TM		 3314 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3315 trace_nfs4_getattr(server, fhandle, fattr, err);
3316 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3317 &exception);
3318 } while (exception.retry);
3319 return err;
3320}
3321
3322/*
3323 * The file is not closed if it is opened due to the a request to change
3324 * the size of the file. The open call will not be needed once the
3325 * VFS layer lookup-intents are implemented.
3326 *
3327 * Close is called when the inode is destroyed.
3328 * If we haven't opened the file for O_WRONLY, we
3329 * need to in the size_change case to obtain a stateid.
3330 *
3331 * Got race?
3332 * Because OPEN is always done by name in nfsv4, it is
3333 * possible that we opened a different file by the same
3334 * name. We can recognize this race condition, but we
3335 * can't do anything about it besides returning an error.
3336 *
3337 * This will be fixed with VFS changes (lookup-intent).
3338 */
3339static int
3340nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3341 struct iattr *sattr)
3342{
2b0143b5 3343 struct inode *inode = d_inode(dentry);
659bfcd6 3344 struct rpc_cred *cred = NULL;
d530838b 3345 struct nfs4_state *state = NULL;
14c43f76 3346 struct nfs4_label *label = NULL;
1da177e4
LT		 3347 int status;
3348
88ac815c
PT		 3349 if (pnfs_ld_layoutret_on_setattr(inode) &&
3350 sattr->ia_valid & ATTR_SIZE &&
3351 sattr->ia_size < i_size_read(inode))
24028672 3352 pnfs_commit_and_return_layout(inode);
8a1636c4 3353
0e574af1 3354 nfs_fattr_init(fattr);
1da177e4 3355
2669940d
AA		 3356 /* Deal with open(O_TRUNC) */
3357 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3358 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3359
3360 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3361 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3362 return 0;
3363
d530838b 3364 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3365 if (sattr->ia_valid & ATTR_FILE) {
3366 struct nfs_open_context *ctx;
3367
3368 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3369 if (ctx) {
3370 cred = ctx->cred;
3371 state = ctx->state;
3372 }
659bfcd6 3373 }
08e9eac4 3374
14c43f76
DQ		 3375 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3376 if (IS_ERR(label))
3377 return PTR_ERR(label);
3378
3379 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3380 if (status == 0) {
f044636d 3381 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3382 nfs_setsecurity(inode, fattr, label);
3383 }
14c43f76 3384 nfs4_label_free(label);
1da177e4
LT		 3385 return status;
3386}
3387
0c2e53f1
TM		 3388static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3389 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3390 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3391{
0c2e53f1 3392 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3393 int status;
3394 struct nfs4_lookup_arg args = {
3395 .bitmask = server->attr_bitmask,
0c2e53f1 3396 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3397 .name = name,
3398 };
3399 struct nfs4_lookup_res res = {
3400 .server = server,
3401 .fattr = fattr,
aa9c2669 3402 .label = label,
2b3de441
DH		 3403 .fh = fhandle,
3404 };
3405 struct rpc_message msg = {
3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3407 .rpc_argp = &args,
3408 .rpc_resp = &res,
3409 };
3410
aa9c2669
DQ		 3411 args.bitmask = nfs4_bitmask(server, label);
3412
2b3de441
DH		 3413 nfs_fattr_init(fattr);
3414
1da177e4 3415 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3416 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3417 dprintk("NFS reply lookup: %d\n", status);
3418 return status;
3419}
3420
72de53ec 3421static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3422{
7ebb9315 3423 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3424 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3425 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3426 fattr->nlink = 2;
3427}
3428
72de53ec
BS		 3429static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3430 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3431 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3432{
3433 struct nfs4_exception exception = { };
72de53ec 3434 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3435 int err;
3436 do {
1775fd3e 3437 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3438 trace_nfs4_lookup(dir, name, err);
72de53ec 3439 switch (err) {
08ef7bd3 3440 case -NFS4ERR_BADNAME:
72de53ec
BS		 3441 err = -ENOENT;
3442 goto out;
0c2e53f1 3443 case -NFS4ERR_MOVED:
f05d147f 3444 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3445 if (err == -NFS4ERR_MOVED)
3446 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3447 goto out;
0c2e53f1 3448 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3449 err = -EPERM;
3450 if (client != *clnt)
3451 goto out;
66b06860 3452 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3453 if (IS_ERR(client))
3454 return PTR_ERR(client);
3455
3456 exception.retry = 1;
3457 break;
3458 default:
3459 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3460 }
1da177e4 3461 } while (exception.retry);
72de53ec
BS		 3462
3463out:
3464 if (err == 0)
3465 *clnt = client;
3466 else if (client != *clnt)
3467 rpc_shutdown_client(client);
3468
1da177e4
LT		 3469 return err;
3470}
3471
80a16b21 3472static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3473 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3474 struct nfs4_label *label)
72de53ec
BS		 3475{
3476 int status;
3477 struct rpc_clnt *client = NFS_CLIENT(dir);
3478
1775fd3e 3479 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3480 if (client != NFS_CLIENT(dir)) {
3481 rpc_shutdown_client(client);
3482 nfs_fixup_secinfo_attributes(fattr);
3483 }
3484 return status;
3485}
3486
f05d147f
BS		 3487struct rpc_clnt *
3488nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3489 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3490{
b72888cb 3491 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3492 int status;
f05d147f 3493
1775fd3e 3494 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3495 if (status < 0)
f05d147f 3496 return ERR_PTR(status);
b72888cb 3497 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3498}
3499
1da177e4
LT		 3500static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3501{
76b32999 3502 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3503 struct nfs4_accessargs args = {
3504 .fh = NFS_FH(inode),
a4980e78 3505 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3506 };
3507 struct nfs4_accessres res = {
3508 .server = server,
1da177e4 3509 };
1da177e4
LT		 3510 struct rpc_message msg = {
3511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3512 .rpc_argp = &args,
3513 .rpc_resp = &res,
3514 .rpc_cred = entry->cred,
3515 };
3516 int mode = entry->mask;
aa9c2669 3517 int status = 0;
1da177e4
LT		 3518
3519 /*
3520 * Determine which access bits we want to ask for...
3521 */
3522 if (mode & MAY_READ)
3523 args.access |= NFS4_ACCESS_READ;
3524 if (S_ISDIR(inode->i_mode)) {
3525 if (mode & MAY_WRITE)
3526 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3527 if (mode & MAY_EXEC)
3528 args.access |= NFS4_ACCESS_LOOKUP;
3529 } else {
3530 if (mode & MAY_WRITE)
3531 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3532 if (mode & MAY_EXEC)
3533 args.access |= NFS4_ACCESS_EXECUTE;
3534 }
c407d41a
TM		 3535
3536 res.fattr = nfs_alloc_fattr();
3537 if (res.fattr == NULL)
3538 return -ENOMEM;
3539
7c513058 3540 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3541 if (!status) {
6168f62c 3542 nfs_access_set_mask(entry, res.access);
c407d41a 3543 nfs_refresh_inode(inode, res.fattr);
1da177e4 3544 }
c407d41a 3545 nfs_free_fattr(res.fattr);
1da177e4
LT		 3546 return status;
3547}
3548
3549static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3550{
3551 struct nfs4_exception exception = { };
3552 int err;
3553 do {
c1578b76
TM		 3554 err = _nfs4_proc_access(inode, entry);
3555 trace_nfs4_access(inode, err);
3556 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3557 &exception);
3558 } while (exception.retry);
3559 return err;
3560}
3561
3562/*
3563 * TODO: For the time being, we don't try to get any attributes
3564 * along with any of the zero-copy operations READ, READDIR,
3565 * READLINK, WRITE.
3566 *
3567 * In the case of the first three, we want to put the GETATTR
3568 * after the read-type operation -- this is because it is hard
3569 * to predict the length of a GETATTR response in v4, and thus
3570 * align the READ data correctly. This means that the GETATTR
3571 * may end up partially falling into the page cache, and we should
3572 * shift it into the 'tail' of the xdr_buf before processing.
3573 * To do this efficiently, we need to know the total length
3574 * of data received, which doesn't seem to be available outside
3575 * of the RPC layer.
3576 *
3577 * In the case of WRITE, we also want to put the GETATTR after
3578 * the operation -- in this case because we want to make sure
140150db 3579 * we get the post-operation mtime and size.
1da177e4
LT		 3580 *
3581 * Both of these changes to the XDR layer would in fact be quite
3582 * minor, but I decided to leave them for a subsequent patch.
3583 */
3584static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3585 unsigned int pgbase, unsigned int pglen)
3586{
3587 struct nfs4_readlink args = {
3588 .fh = NFS_FH(inode),
3589 .pgbase = pgbase,
3590 .pglen = pglen,
3591 .pages = &page,
3592 };
f50c7000 3593 struct nfs4_readlink_res res;
1da177e4
LT		 3594 struct rpc_message msg = {
3595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3596 .rpc_argp = &args,
f50c7000 3597 .rpc_resp = &res,
1da177e4
LT		 3598 };
3599
7c513058 3600 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3601}
3602
3603static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3604 unsigned int pgbase, unsigned int pglen)
3605{
3606 struct nfs4_exception exception = { };
3607 int err;
3608 do {
c1578b76
TM		 3609 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3610 trace_nfs4_readlink(inode, err);
3611 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3612 &exception);
3613 } while (exception.retry);
3614 return err;
3615}
3616
1da177e4 3617/*
8867fe58 3618 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3619 */
1da177e4
LT		 3620static int
3621nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3622 int flags)
1da177e4 3623{
aa9c2669 3624 struct nfs4_label l, *ilabel = NULL;
8867fe58 3625 struct nfs_open_context *ctx;
1da177e4 3626 struct nfs4_state *state;
1da177e4
LT		 3627 int status = 0;
3628
8867fe58
MS		 3629 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3630 if (IS_ERR(ctx))
3631 return PTR_ERR(ctx);
3632
aa9c2669
DQ		 3633 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3634
a8a5da99 3635 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3636 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3637 if (IS_ERR(state)) {
3638 status = PTR_ERR(state);
c0204fd2 3639 goto out;
1da177e4 3640 }
1da177e4 3641out:
aa9c2669 3642 nfs4_label_release_security(ilabel);
8867fe58 3643 put_nfs_open_context(ctx);
1da177e4
LT		 3644 return status;
3645}
3646
3647static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3648{
16e42959 3649 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3650 struct nfs_removeargs args = {
1da177e4 3651 .fh = NFS_FH(dir),
26fe5750 3652 .name = *name,
16e42959 3653 };
4fdc17b2 3654 struct nfs_removeres res = {
16e42959 3655 .server = server,
1da177e4 3656 };
1da177e4 3657 struct rpc_message msg = {
4fdc17b2
TM		 3658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3659 .rpc_argp = &args,
3660 .rpc_resp = &res,
1da177e4 3661 };
778d2817 3662 int status;
1da177e4 3663
7c513058 3664 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3665 if (status == 0)
16e42959 3666 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3667 return status;
3668}
3669
3670static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3671{
3672 struct nfs4_exception exception = { };
3673 int err;
3674 do {
078ea3df
TM		 3675 err = _nfs4_proc_remove(dir, name);
3676 trace_nfs4_remove(dir, name, err);
3677 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3678 &exception);
3679 } while (exception.retry);
3680 return err;
3681}
3682
e4eff1a6 3683static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3684{
e4eff1a6
TM		 3685 struct nfs_server *server = NFS_SERVER(dir);
3686 struct nfs_removeargs *args = msg->rpc_argp;
3687 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3688
e4eff1a6 3689 res->server = server;
1da177e4 3690 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3691 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3692
3693 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3694}
3695
34e137cc
BS		 3696static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3697{
d9afbd1b
TM		 3698 nfs4_setup_sequence(NFS_SERVER(data->dir),
3699 &data->args.seq_args,
3700 &data->res.seq_res,
3701 task);
1da177e4
LT		 3702}
3703
e4eff1a6 3704static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3705{
078ea3df
TM		 3706 struct nfs_unlinkdata *data = task->tk_calldata;
3707 struct nfs_removeres *res = &data->res;
e4eff1a6 3708
14516c3a
TM		 3709 if (!nfs4_sequence_done(task, &res->seq_res))
3710 return 0;
8478eaa1
N		 3711 if (nfs4_async_handle_error(task, res->server, NULL,
3712 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3713 return 0;
3714 update_changeattr(dir, &res->cinfo);
e4eff1a6 3715 return 1;
1da177e4
LT		 3716}
3717
d3d4152a
JL		 3718static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3719{
3720 struct nfs_server *server = NFS_SERVER(dir);
3721 struct nfs_renameargs *arg = msg->rpc_argp;
3722 struct nfs_renameres *res = msg->rpc_resp;
3723
3724 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3725 res->server = server;
a9c92d6b 3726 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3727}
3728
c6bfa1a1
BS		 3729static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3730{
d9afbd1b
TM		 3731 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3732 &data->args.seq_args,
3733 &data->res.seq_res,
3734 task);
d3d4152a
JL		 3735}
3736
3737static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3738 struct inode *new_dir)
3739{
fbc6f7c2
TM		 3740 struct nfs_renamedata *data = task->tk_calldata;
3741 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3742
3743 if (!nfs4_sequence_done(task, &res->seq_res))
3744 return 0;
8478eaa1 3745 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3746 return 0;
3747
3748 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3749 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3750 return 1;
3751}
3752
1da177e4
LT		 3753static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3754{
91ba2eee 3755 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3756 struct nfs4_link_arg arg = {
3757 .fh = NFS_FH(inode),
3758 .dir_fh = NFS_FH(dir),
3759 .name = name,
91ba2eee
TM		 3760 .bitmask = server->attr_bitmask,
3761 };
91ba2eee
TM		 3762 struct nfs4_link_res res = {
3763 .server = server,
1775fd3e 3764 .label = NULL,
1da177e4 3765 };
1da177e4
LT		 3766 struct rpc_message msg = {
3767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3768 .rpc_argp = &arg,
91ba2eee 3769 .rpc_resp = &res,
1da177e4 3770 };
136f2627
TM		 3771 int status = -ENOMEM;
3772
3773 res.fattr = nfs_alloc_fattr();
778d2817 3774 if (res.fattr == NULL)
136f2627 3775 goto out;
1da177e4 3776
14c43f76
DQ		 3777 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3778 if (IS_ERR(res.label)) {
3779 status = PTR_ERR(res.label);
3780 goto out;
3781 }
aa9c2669 3782 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3783
7c513058 3784 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3785 if (!status) {
3786 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3787 status = nfs_post_op_update_inode(inode, res.fattr);
3788 if (!status)
3789 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3790 }
14c43f76
DQ		 3791
3792
3793 nfs4_label_free(res.label);
3794
136f2627 3795out:
136f2627 3796 nfs_free_fattr(res.fattr);
1da177e4
LT		 3797 return status;
3798}
3799
3800static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3801{
3802 struct nfs4_exception exception = { };
3803 int err;
3804 do {
3805 err = nfs4_handle_exception(NFS_SERVER(inode),
3806 _nfs4_proc_link(inode, dir, name),
3807 &exception);
3808 } while (exception.retry);
3809 return err;
3810}
3811
57dc9a57
TM		 3812struct nfs4_createdata {
3813 struct rpc_message msg;
3814 struct nfs4_create_arg arg;
3815 struct nfs4_create_res res;
3816 struct nfs_fh fh;
3817 struct nfs_fattr fattr;
1775fd3e 3818 struct nfs4_label *label;
57dc9a57
TM		 3819};
3820
3821static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3822 struct qstr *name, struct iattr *sattr, u32 ftype)
3823{
3824 struct nfs4_createdata *data;
3825
3826 data = kzalloc(sizeof(*data), GFP_KERNEL);
3827 if (data != NULL) {
3828 struct nfs_server *server = NFS_SERVER(dir);
3829
14c43f76
DQ		 3830 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3831 if (IS_ERR(data->label))
3832 goto out_free;
3833
57dc9a57
TM		 3834 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3835 data->msg.rpc_argp = &data->arg;
3836 data->msg.rpc_resp = &data->res;
3837 data->arg.dir_fh = NFS_FH(dir);
3838 data->arg.server = server;
3839 data->arg.name = name;
3840 data->arg.attrs = sattr;
3841 data->arg.ftype = ftype;
aa9c2669 3842 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3843 data->res.server = server;
3844 data->res.fh = &data->fh;
3845 data->res.fattr = &data->fattr;
1775fd3e 3846 data->res.label = data->label;
57dc9a57 3847 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3848 }
3849 return data;
14c43f76
DQ		 3850out_free:
3851 kfree(data);
3852 return NULL;
57dc9a57
TM		 3853}
3854
3855static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3856{
7c513058 3857 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3858 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3859 if (status == 0) {
3860 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3861 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3862 }
3863 return status;
3864}
3865
3866static void nfs4_free_createdata(struct nfs4_createdata *data)
3867{
14c43f76 3868 nfs4_label_free(data->label);
57dc9a57
TM		 3869 kfree(data);
3870}
3871
4f390c15 3872static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3873 struct page *page, unsigned int len, struct iattr *sattr,
3874 struct nfs4_label *label)
1da177e4 3875{
57dc9a57
TM		 3876 struct nfs4_createdata *data;
3877 int status = -ENAMETOOLONG;
1da177e4 3878
94a6d753 3879 if (len > NFS4_MAXPATHLEN)
57dc9a57 3880 goto out;
4f390c15 3881
57dc9a57
TM		 3882 status = -ENOMEM;
3883 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3884 if (data == NULL)
3885 goto out;
3886
3887 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3888 data->arg.u.symlink.pages = &page;
3889 data->arg.u.symlink.len = len;
1775fd3e 3890 data->arg.label = label;
1da177e4 3891
57dc9a57
TM		 3892 status = nfs4_do_create(dir, dentry, data);
3893
3894 nfs4_free_createdata(data);
3895out:
1da177e4
LT		 3896 return status;
3897}
3898
4f390c15 3899static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3900 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3901{
3902 struct nfs4_exception exception = { };
aa9c2669 3903 struct nfs4_label l, *label = NULL;
1da177e4 3904 int err;
aa9c2669
DQ		 3905
3906 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3907
1da177e4 3908 do {
078ea3df
TM		 3909 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3910 trace_nfs4_symlink(dir, &dentry->d_name, err);
3911 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3912 &exception);
3913 } while (exception.retry);
aa9c2669
DQ		 3914
3915 nfs4_label_release_security(label);
1da177e4
LT		 3916 return err;
3917}
3918
3919static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3920 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3921{
57dc9a57
TM		 3922 struct nfs4_createdata *data;
3923 int status = -ENOMEM;
1da177e4 3924
57dc9a57
TM		 3925 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3926 if (data == NULL)
3927 goto out;
3928
1775fd3e 3929 data->arg.label = label;
57dc9a57
TM		 3930 status = nfs4_do_create(dir, dentry, data);
3931
3932 nfs4_free_createdata(data);
3933out:
1da177e4
LT		 3934 return status;
3935}
3936
3937static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3938 struct iattr *sattr)
3939{
3940 struct nfs4_exception exception = { };
aa9c2669 3941 struct nfs4_label l, *label = NULL;
1da177e4 3942 int err;
a8a5da99 3943
aa9c2669
DQ		 3944 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3945
a8a5da99 3946 sattr->ia_mode &= ~current_umask();
1da177e4 3947 do {
078ea3df
TM		 3948 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3949 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3950 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3951 &exception);
3952 } while (exception.retry);
aa9c2669
DQ		 3953 nfs4_label_release_security(label);
3954
1da177e4
LT		 3955 return err;
3956}
3957
3958static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3959 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3960{
2b0143b5 3961 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3962 struct nfs4_readdir_arg args = {
3963 .fh = NFS_FH(dir),
56e4ebf8 3964 .pages = pages,
1da177e4
LT		 3965 .pgbase = 0,
3966 .count = count,
2b0143b5 3967 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3968 .plus = plus,
1da177e4
LT		 3969 };
3970 struct nfs4_readdir_res res;
3971 struct rpc_message msg = {
3972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3973 .rpc_argp = &args,
3974 .rpc_resp = &res,
3975 .rpc_cred = cred,
3976 };
3977 int status;
3978
6de1472f
AV		 3979 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3980 dentry,
eadf4598 3981 (unsigned long long)cookie);
c3f52af3 3982 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3983 res.pgbase = args.pgbase;
7c513058 3984 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3985 if (status >= 0) {
c3f52af3 3986 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3987 status += args.pgbase;
3988 }
c4812998
TM		 3989
3990 nfs_invalidate_atime(dir);
3991
3110ff80 3992 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3993 return status;
3994}
3995
3996static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3997 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3998{
3999 struct nfs4_exception exception = { };
4000 int err;
4001 do {
c1578b76
TM		 4002 err = _nfs4_proc_readdir(dentry, cred, cookie,
4003 pages, count, plus);
2b0143b5
DH		 4004 trace_nfs4_readdir(d_inode(dentry), err);
4005 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4006 &exception);
4007 } while (exception.retry);
4008 return err;
4009}
4010
4011static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4012 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4013{
57dc9a57
TM		 4014 struct nfs4_createdata *data;
4015 int mode = sattr->ia_mode;
4016 int status = -ENOMEM;
1da177e4 4017
57dc9a57
TM		 4018 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4019 if (data == NULL)
4020 goto out;
4021
1da177e4 4022 if (S_ISFIFO(mode))
57dc9a57 4023 data->arg.ftype = NF4FIFO;
1da177e4 4024 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4025 data->arg.ftype = NF4BLK;
4026 data->arg.u.device.specdata1 = MAJOR(rdev);
4027 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4028 }
4029 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4030 data->arg.ftype = NF4CHR;
4031 data->arg.u.device.specdata1 = MAJOR(rdev);
4032 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4033 } else if (!S_ISSOCK(mode)) {
4034 status = -EINVAL;
4035 goto out_free;
1da177e4 4036 }
1775fd3e 4037
aa9c2669 4038 data->arg.label = label;
57dc9a57 4039 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4040out_free:
57dc9a57
TM		 4041 nfs4_free_createdata(data);
4042out:
1da177e4
LT		 4043 return status;
4044}
4045
4046static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4047 struct iattr *sattr, dev_t rdev)
4048{
4049 struct nfs4_exception exception = { };
aa9c2669 4050 struct nfs4_label l, *label = NULL;
1da177e4 4051 int err;
a8a5da99 4052
aa9c2669
DQ		 4053 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4054
a8a5da99 4055 sattr->ia_mode &= ~current_umask();
1da177e4 4056 do {
078ea3df
TM		 4057 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4058 trace_nfs4_mknod(dir, &dentry->d_name, err);
4059 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4060 &exception);
4061 } while (exception.retry);
aa9c2669
DQ		 4062
4063 nfs4_label_release_security(label);
4064
1da177e4
LT		 4065 return err;
4066}
4067
4068static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4069 struct nfs_fsstat *fsstat)
4070{
4071 struct nfs4_statfs_arg args = {
4072 .fh = fhandle,
4073 .bitmask = server->attr_bitmask,
4074 };
24ad148a
BH		 4075 struct nfs4_statfs_res res = {
4076 .fsstat = fsstat,
4077 };
1da177e4
LT		 4078 struct rpc_message msg = {
4079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4080 .rpc_argp = &args,
24ad148a 4081 .rpc_resp = &res,
1da177e4
LT		 4082 };
4083
0e574af1 4084 nfs_fattr_init(fsstat->fattr);
7c513058 4085 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4086}
4087
4088static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4089{
4090 struct nfs4_exception exception = { };
4091 int err;
4092 do {
4093 err = nfs4_handle_exception(server,
4094 _nfs4_proc_statfs(server, fhandle, fsstat),
4095 &exception);
4096 } while (exception.retry);
4097 return err;
4098}
4099
4100static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4101 struct nfs_fsinfo *fsinfo)
4102{
4103 struct nfs4_fsinfo_arg args = {
4104 .fh = fhandle,
4105 .bitmask = server->attr_bitmask,
4106 };
3dda5e43
BH		 4107 struct nfs4_fsinfo_res res = {
4108 .fsinfo = fsinfo,
4109 };
1da177e4
LT		 4110 struct rpc_message msg = {
4111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4112 .rpc_argp = &args,
3dda5e43 4113 .rpc_resp = &res,
1da177e4
LT		 4114 };
4115
7c513058 4116 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4117}
4118
4119static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4120{
4121 struct nfs4_exception exception = { };
83ca7f5a 4122 unsigned long now = jiffies;
1da177e4
LT		 4123 int err;
4124
4125 do {
83ca7f5a 4126 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4127 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4128 if (err == 0) {
4129 struct nfs_client *clp = server->nfs_client;
4130
4131 spin_lock(&clp->cl_lock);
4132 clp->cl_lease_time = fsinfo->lease_time * HZ;
4133 clp->cl_last_renewal = now;
4134 spin_unlock(&clp->cl_lock);
4135 break;
4136 }
4137 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4138 } while (exception.retry);
4139 return err;
4140}
4141
4142static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4143{
e38eb650
BS		 4144 int error;
4145
0e574af1 4146 nfs_fattr_init(fsinfo->fattr);
e38eb650 4147 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4148 if (error == 0) {
4149 /* block layout checks this! */
4150 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4151 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4152 }
e38eb650
BS		 4153
4154 return error;
1da177e4
LT		 4155}
4156
4157static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4158 struct nfs_pathconf *pathconf)
4159{
4160 struct nfs4_pathconf_arg args = {
4161 .fh = fhandle,
4162 .bitmask = server->attr_bitmask,
4163 };
d45b2989
BH		 4164 struct nfs4_pathconf_res res = {
4165 .pathconf = pathconf,
4166 };
1da177e4
LT		 4167 struct rpc_message msg = {
4168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4169 .rpc_argp = &args,
d45b2989 4170 .rpc_resp = &res,
1da177e4
LT		 4171 };
4172
4173 /* None of the pathconf attributes are mandatory to implement */
4174 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4175 memset(pathconf, 0, sizeof(*pathconf));
4176 return 0;
4177 }
4178
0e574af1 4179 nfs_fattr_init(pathconf->fattr);
7c513058 4180 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4181}
4182
4183static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4184 struct nfs_pathconf *pathconf)
4185{
4186 struct nfs4_exception exception = { };
4187 int err;
4188
4189 do {
4190 err = nfs4_handle_exception(server,
4191 _nfs4_proc_pathconf(server, fhandle, pathconf),
4192 &exception);
4193 } while (exception.retry);
4194 return err;
4195}
4196
5521abfd 4197int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4198 const struct nfs_open_context *ctx,
4199 const struct nfs_lock_context *l_ctx,
4200 fmode_t fmode)
4201{
4202 const struct nfs_lockowner *lockowner = NULL;
4203
4204 if (l_ctx != NULL)
4205 lockowner = &l_ctx->lockowner;
5521abfd 4206 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4207}
4208EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4209
5521abfd
TM		 4210static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4211 const struct nfs_open_context *ctx,
4212 const struct nfs_lock_context *l_ctx,
4213 fmode_t fmode)
4214{
4215 nfs4_stateid current_stateid;
4216
e1253be0
TM		 4217 /* If the current stateid represents a lost lock, then exit */
4218 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4219 return true;
5521abfd
TM		 4220 return nfs4_stateid_match(stateid, &current_stateid);
4221}
4222
4223static bool nfs4_error_stateid_expired(int err)
4224{
4225 switch (err) {
4226 case -NFS4ERR_DELEG_REVOKED:
4227 case -NFS4ERR_ADMIN_REVOKED:
4228 case -NFS4ERR_BAD_STATEID:
4229 case -NFS4ERR_STALE_STATEID:
4230 case -NFS4ERR_OLD_STATEID:
4231 case -NFS4ERR_OPENMODE:
4232 case -NFS4ERR_EXPIRED:
4233 return true;
4234 }
4235 return false;
4236}
4237
d45f60c6 4238void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4239{
d45f60c6 4240 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4241}
4242
d45f60c6 4243static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4244{
d45f60c6 4245 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4246
d45f60c6
WAA		 4247 trace_nfs4_read(hdr, task->tk_status);
4248 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4249 hdr->args.context->state,
4250 NULL) == -EAGAIN) {
d00c5d43 4251 rpc_restart_call_prepare(task);
ec06c096 4252 return -EAGAIN;
1da177e4 4253 }
8850df99 4254
d45f60c6 4255 __nfs4_read_done_cb(hdr);
1da177e4 4256 if (task->tk_status > 0)
d45f60c6 4257 renew_lease(server, hdr->timestamp);
ec06c096 4258 return 0;
1da177e4
LT		 4259}
4260
5521abfd 4261static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4262 struct nfs_pgio_args *args)
5521abfd
TM		 4263{
4264
4265 if (!nfs4_error_stateid_expired(task->tk_status) ||
4266 nfs4_stateid_is_current(&args->stateid,
4267 args->context,
4268 args->lock_context,
4269 FMODE_READ))
4270 return false;
4271 rpc_restart_call_prepare(task);
4272 return true;
4273}
4274
d45f60c6 4275static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4276{
4277
4278 dprintk("--> %s\n", __func__);
4279
d45f60c6 4280 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4281 return -EAGAIN;
d45f60c6 4282 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4283 return -EAGAIN;
d45f60c6
WAA		 4284 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4285 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4286}
4287
d45f60c6
WAA		 4288static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4289 struct rpc_message *msg)
1da177e4 4290{
d45f60c6
WAA		 4291 hdr->timestamp = jiffies;
4292 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4293 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4294 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4295}
4296
d45f60c6
WAA		 4297static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4298 struct nfs_pgio_header *hdr)
ea7c3303 4299{
d45f60c6
WAA		 4300 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4301 &hdr->args.seq_args,
4302 &hdr->res.seq_res,
9b206149 4303 task))
ef1820f9 4304 return 0;
d45f60c6
WAA		 4305 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4306 hdr->args.lock_context,
4307 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4308 return -EIO;
d45f60c6 4309 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4310 return -EIO;
4311 return 0;
1da177e4
LT		 4312}
4313
d45f60c6
WAA		 4314static int nfs4_write_done_cb(struct rpc_task *task,
4315 struct nfs_pgio_header *hdr)
1da177e4 4316{
d45f60c6 4317 struct inode *inode = hdr->inode;
8478eaa1 4318
d45f60c6
WAA		 4319 trace_nfs4_write(hdr, task->tk_status);
4320 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4321 hdr->args.context->state,
4322 NULL) == -EAGAIN) {
d00c5d43 4323 rpc_restart_call_prepare(task);
788e7a89 4324 return -EAGAIN;
1da177e4 4325 }
4f9838c7 4326 if (task->tk_status >= 0) {
d45f60c6 4327 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4328 nfs_writeback_update_inode(hdr);
4f9838c7 4329 }
788e7a89 4330 return 0;
1da177e4
LT		 4331}
4332
5521abfd 4333static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4334 struct nfs_pgio_args *args)
5521abfd
TM		 4335{
4336
4337 if (!nfs4_error_stateid_expired(task->tk_status) ||
4338 nfs4_stateid_is_current(&args->stateid,
4339 args->context,
4340 args->lock_context,
4341 FMODE_WRITE))
4342 return false;
4343 rpc_restart_call_prepare(task);
4344 return true;
4345}
4346
d45f60c6 4347static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4348{
d45f60c6 4349 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4350 return -EAGAIN;
d45f60c6 4351 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4352 return -EAGAIN;
d45f60c6
WAA		 4353 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4354 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4355}
4356
5a37f851 4357static
d45f60c6 4358bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4359{
5a37f851 4360 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4361 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4362 return false;
4363 /* Otherwise, request attributes if and only if we don't hold
4364 * a delegation
4365 */
011e2a7f 4366 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4367}
a69aef14 4368
d45f60c6
WAA		 4369static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4370 struct rpc_message *msg)
1da177e4 4371{
d45f60c6 4372 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4373
d45f60c6
WAA		 4374 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4375 hdr->args.bitmask = NULL;
4376 hdr->res.fattr = NULL;
7ffd1064 4377 } else
d45f60c6 4378 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4379
d45f60c6
WAA		 4380 if (!hdr->pgio_done_cb)
4381 hdr->pgio_done_cb = nfs4_write_done_cb;
4382 hdr->res.server = server;
4383 hdr->timestamp = jiffies;
1da177e4 4384
bdc7f021 4385 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4386 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4387}
4388
0b7c0153 4389static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4390{
d9afbd1b
TM		 4391 nfs4_setup_sequence(NFS_SERVER(data->inode),
4392 &data->args.seq_args,
4393 &data->res.seq_res,
4394 task);
1da177e4
LT		 4395}
4396
0b7c0153 4397static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4398{
1da177e4 4399 struct inode *inode = data->inode;
14516c3a 4400
cc668ab3 4401 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4402 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4403 NULL, NULL) == -EAGAIN) {
d00c5d43 4404 rpc_restart_call_prepare(task);
788e7a89 4405 return -EAGAIN;
1da177e4 4406 }
788e7a89 4407 return 0;
1da177e4
LT		 4408}
4409
0b7c0153 4410static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4411{
4412 if (!nfs4_sequence_done(task, &data->res.seq_res))
4413 return -EAGAIN;
0b7c0153 4414 return data->commit_done_cb(task, data);
5f452431
FI		 4415}
4416
0b7c0153 4417static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4418{
788e7a89 4419 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4420
0b7c0153
FI		 4421 if (data->commit_done_cb == NULL)
4422 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4423 data->res.server = server;
bdc7f021 4424 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4425 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4426}
4427
9bc4e3ca
CL		 4428struct nfs4_renewdata {
4429 struct nfs_client *client;
4430 unsigned long timestamp;
4431};
4432
1da177e4
LT		 4433/*
4434 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4435 * standalone procedure for queueing an asynchronous RENEW.
4436 */
9bc4e3ca 4437static void nfs4_renew_release(void *calldata)
dc96aef9 4438{
9bc4e3ca
CL		 4439 struct nfs4_renewdata *data = calldata;
4440 struct nfs_client *clp = data->client;
dc96aef9 4441
0851de06
AB		 4442 if (atomic_read(&clp->cl_count) > 1)
4443 nfs4_schedule_state_renewal(clp);
4444 nfs_put_client(clp);
9bc4e3ca 4445 kfree(data);
dc96aef9
AB		 4446}
4447
9bc4e3ca 4448static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4449{
9bc4e3ca
CL		 4450 struct nfs4_renewdata *data = calldata;
4451 struct nfs_client *clp = data->client;
4452 unsigned long timestamp = data->timestamp;
1da177e4 4453
c6d01c6f 4454 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4455 switch (task->tk_status) {
4456 case 0:
4457 break;
4458 case -NFS4ERR_LEASE_MOVED:
4459 nfs4_schedule_lease_moved_recovery(clp);
4460 break;
4461 default:
95baa25c 4462 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4463 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4464 return;
4465 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4466 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4467 return;
4468 }
4469 nfs4_schedule_path_down_recovery(clp);
1da177e4 4470 }
452e9352 4471 do_renew_lease(clp, timestamp);
1da177e4
LT		 4472}
4473
963d8fe5
TM		 4474static const struct rpc_call_ops nfs4_renew_ops = {
4475 .rpc_call_done = nfs4_renew_done,
dc96aef9 4476 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4477};
4478
2f60ea6b 4479static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4480{
4481 struct rpc_message msg = {
4482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4483 .rpc_argp = clp,
b4454fe1 4484 .rpc_cred = cred,
1da177e4 4485 };
9bc4e3ca 4486 struct nfs4_renewdata *data;
1da177e4 4487
2f60ea6b
TM		 4488 if (renew_flags == 0)
4489 return 0;
0851de06
AB		 4490 if (!atomic_inc_not_zero(&clp->cl_count))
4491 return -EIO;
b569ad34 4492 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4493 if (data == NULL)
4494 return -ENOMEM;
4495 data->client = clp;
4496 data->timestamp = jiffies;
bc7a05ca 4497 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4498 &nfs4_renew_ops, data);
1da177e4
LT		 4499}
4500
8534d4ec 4501static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4502{
4503 struct rpc_message msg = {
4504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4505 .rpc_argp = clp,
b4454fe1 4506 .rpc_cred = cred,
1da177e4
LT		 4507 };
4508 unsigned long now = jiffies;
4509 int status;
4510
bc7a05ca 4511 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4512 if (status < 0)
4513 return status;
452e9352 4514 do_renew_lease(clp, now);
1da177e4
LT		 4515 return 0;
4516}
4517
aa1870af
BF		 4518static inline int nfs4_server_supports_acls(struct nfs_server *server)
4519{
7dd7d959 4520 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4521}
4522
21f498c2
TM		 4523/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4524 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4525 * the stack.
4526 */
21f498c2 4527#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4528
e9e3d724
NH		 4529static int buf_to_pages_noslab(const void *buf, size_t buflen,
4530 struct page **pages, unsigned int *pgbase)
4531{
4532 struct page *newpage, **spages;
4533 int rc = 0;
4534 size_t len;
4535 spages = pages;
4536
4537 do {
21f498c2 4538 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4539 newpage = alloc_page(GFP_KERNEL);
4540
4541 if (newpage == NULL)
4542 goto unwind;
4543 memcpy(page_address(newpage), buf, len);
4544 buf += len;
4545 buflen -= len;
4546 *pages++ = newpage;
4547 rc++;
4548 } while (buflen != 0);
4549
4550 return rc;
4551
4552unwind:
4553 for(; rc > 0; rc--)
4554 __free_page(spages[rc-1]);
4555 return -ENOMEM;
4556}
4557
e50a1c2e
BF		 4558struct nfs4_cached_acl {
4559 int cached;
4560 size_t len;
3e9d4154 4561 char data[0];
e50a1c2e
BF		 4562};
4563
4564static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4565{
4566 struct nfs_inode *nfsi = NFS_I(inode);
4567
4568 spin_lock(&inode->i_lock);
4569 kfree(nfsi->nfs4_acl);
4570 nfsi->nfs4_acl = acl;
4571 spin_unlock(&inode->i_lock);
4572}
4573
4574static void nfs4_zap_acl_attr(struct inode *inode)
4575{
4576 nfs4_set_cached_acl(inode, NULL);
4577}
4578
4579static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4580{
4581 struct nfs_inode *nfsi = NFS_I(inode);
4582 struct nfs4_cached_acl *acl;
4583 int ret = -ENOENT;
4584
4585 spin_lock(&inode->i_lock);
4586 acl = nfsi->nfs4_acl;
4587 if (acl == NULL)
4588 goto out;
4589 if (buf == NULL) /* user is just asking for length */
4590 goto out_len;
4591 if (acl->cached == 0)
4592 goto out;
4593 ret = -ERANGE; /* see getxattr(2) man page */
4594 if (acl->len > buflen)
4595 goto out;
4596 memcpy(buf, acl->data, acl->len);
4597out_len:
4598 ret = acl->len;
4599out:
4600 spin_unlock(&inode->i_lock);
4601 return ret;
4602}
4603
5794d21e 4604static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4605{
4606 struct nfs4_cached_acl *acl;
b291f1b1 4607 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4608
1f1ea6c2 4609 if (buflen <= PAGE_SIZE) {
b291f1b1 4610 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4611 if (acl == NULL)
4612 goto out;
4613 acl->cached = 1;
5794d21e 4614 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4615 } else {
4616 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4617 if (acl == NULL)
4618 goto out;
4619 acl->cached = 0;
4620 }
4621 acl->len = acl_len;
4622out:
4623 nfs4_set_cached_acl(inode, acl);
4624}
4625
bf118a34
AA		 4626/*
4627 * The getxattr API returns the required buffer length when called with a
4628 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4629 * the required buf. On a NULL buf, we send a page of data to the server
4630 * guessing that the ACL request can be serviced by a page. If so, we cache
4631 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4632 * the cache. If not so, we throw away the page, and cache the required
4633 * length. The next getxattr call will then produce another round trip to
4634 * the server, this time with the input buf of the required size.
4635 */
16b4289c 4636static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4637{
bf118a34 4638 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4639 struct nfs_getaclargs args = {
4640 .fh = NFS_FH(inode),
4641 .acl_pages = pages,
4642 .acl_len = buflen,
4643 };
663c79b3
BH		 4644 struct nfs_getaclres res = {
4645 .acl_len = buflen,
4646 };
aa1870af
BF		 4647 struct rpc_message msg = {
4648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4649 .rpc_argp = &args,
663c79b3 4650 .rpc_resp = &res,
aa1870af 4651 };
21f498c2
TM		 4652 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4653 int ret = -ENOMEM, i;
aa1870af 4654
bf118a34
AA		 4655 /* As long as we're doing a round trip to the server anyway,
4656 * let's be prepared for a page of acl data. */
4657 if (npages == 0)
4658 npages = 1;
21f498c2
TM		 4659 if (npages > ARRAY_SIZE(pages))
4660 return -ERANGE;
5a006899 4661
bf118a34
AA		 4662 for (i = 0; i < npages; i++) {
4663 pages[i] = alloc_page(GFP_KERNEL);
4664 if (!pages[i])
4665 goto out_free;
e50a1c2e 4666 }
5a006899
SP		 4667
4668 /* for decoding across pages */
4669 res.acl_scratch = alloc_page(GFP_KERNEL);
4670 if (!res.acl_scratch)
4671 goto out_free;
4672
bf118a34
AA		 4673 args.acl_len = npages * PAGE_SIZE;
4674 args.acl_pgbase = 0;
5a006899 4675
de040bec 4676 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4677 __func__, buf, buflen, npages, args.acl_len);
4678 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4679 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4680 if (ret)
4681 goto out_free;
bf118a34 4682
1f1ea6c2
TM		 4683 /* Handle the case where the passed-in buffer is too short */
4684 if (res.acl_flags & NFS4_ACL_TRUNC) {
4685 /* Did the user only issue a request for the acl length? */
4686 if (buf == NULL)
4687 goto out_ok;
e50a1c2e 4688 ret = -ERANGE;
1f1ea6c2 4689 goto out_free;
e50a1c2e 4690 }
1f1ea6c2 4691 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4692 if (buf) {
4693 if (res.acl_len > buflen) {
4694 ret = -ERANGE;
4695 goto out_free;
4696 }
1f1ea6c2 4697 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4698 }
1f1ea6c2
TM		 4699out_ok:
4700 ret = res.acl_len;
e50a1c2e 4701out_free:
bf118a34
AA		 4702 for (i = 0; i < npages; i++)
4703 if (pages[i])
4704 __free_page(pages[i]);
331818f1
TM		 4705 if (res.acl_scratch)
4706 __free_page(res.acl_scratch);
aa1870af
BF		 4707 return ret;
4708}
4709
16b4289c
TM		 4710static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4711{
4712 struct nfs4_exception exception = { };
4713 ssize_t ret;
4714 do {
4715 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4716 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4717 if (ret >= 0)
4718 break;
4719 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4720 } while (exception.retry);
4721 return ret;
4722}
4723
e50a1c2e
BF		 4724static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4725{
4726 struct nfs_server *server = NFS_SERVER(inode);
4727 int ret;
4728
4729 if (!nfs4_server_supports_acls(server))
4730 return -EOPNOTSUPP;
4731 ret = nfs_revalidate_inode(server, inode);
4732 if (ret < 0)
4733 return ret;
08a22b39
AK		 4734 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4735 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4736 ret = nfs4_read_cached_acl(inode, buf, buflen);
4737 if (ret != -ENOENT)
bf118a34
AA		 4738 /* -ENOENT is returned if there is no ACL or if there is an ACL
4739 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4740 return ret;
4741 return nfs4_get_acl_uncached(inode, buf, buflen);
4742}
4743
16b4289c 4744static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4745{
4746 struct nfs_server *server = NFS_SERVER(inode);
4747 struct page *pages[NFS4ACL_MAXPAGES];
4748 struct nfs_setaclargs arg = {
4749 .fh = NFS_FH(inode),
4750 .acl_pages = pages,
4751 .acl_len = buflen,
4752 };
73c403a9 4753 struct nfs_setaclres res;
4b580ee3
BF		 4754 struct rpc_message msg = {
4755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4756 .rpc_argp = &arg,
73c403a9 4757 .rpc_resp = &res,
4b580ee3 4758 };
21f498c2 4759 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4760 int ret, i;
4b580ee3
BF		 4761
4762 if (!nfs4_server_supports_acls(server))
4763 return -EOPNOTSUPP;
21f498c2
TM		 4764 if (npages > ARRAY_SIZE(pages))
4765 return -ERANGE;
e9e3d724
NH		 4766 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4767 if (i < 0)
4768 return i;
57ec14c5 4769 nfs4_inode_return_delegation(inode);
7c513058 4770 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4771
4772 /*
4773 * Free each page after tx, so the only ref left is
4774 * held by the network stack
4775 */
4776 for (; i > 0; i--)
4777 put_page(pages[i-1]);
4778
08a22b39
AK		 4779 /*
4780 * Acl update can result in inode attribute update.
4781 * so mark the attribute cache invalid.
4782 */
4783 spin_lock(&inode->i_lock);
4784 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4785 spin_unlock(&inode->i_lock);
f41f7418
TM		 4786 nfs_access_zap_cache(inode);
4787 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4788 return ret;
4789}
4790
16b4289c
TM		 4791static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4792{
4793 struct nfs4_exception exception = { };
4794 int err;
4795 do {
c1578b76
TM		 4796 err = __nfs4_proc_set_acl(inode, buf, buflen);
4797 trace_nfs4_set_acl(inode, err);
4798 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4799 &exception);
4800 } while (exception.retry);
4801 return err;
4802}
4803
aa9c2669
DQ		 4804#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4805static int _nfs4_get_security_label(struct inode *inode, void *buf,
4806 size_t buflen)
4807{
4808 struct nfs_server *server = NFS_SERVER(inode);
4809 struct nfs_fattr fattr;
4810 struct nfs4_label label = {0, 0, buflen, buf};
4811
4812 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4813 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4814 .fh = NFS_FH(inode),
4815 .bitmask = bitmask,
4816 };
4817 struct nfs4_getattr_res res = {
4818 .fattr = &fattr,
4819 .label = &label,
4820 .server = server,
4821 };
4822 struct rpc_message msg = {
4823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4824 .rpc_argp = &arg,
aa9c2669
DQ		 4825 .rpc_resp = &res,
4826 };
4827 int ret;
4828
4829 nfs_fattr_init(&fattr);
4830
fcb63a9b 4831 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4832 if (ret)
4833 return ret;
4834 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4835 return -ENOENT;
4836 if (buflen < label.len)
4837 return -ERANGE;
4838 return 0;
4839}
4840
4841static int nfs4_get_security_label(struct inode *inode, void *buf,
4842 size_t buflen)
4843{
4844 struct nfs4_exception exception = { };
4845 int err;
4846
4847 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4848 return -EOPNOTSUPP;
4849
4850 do {
c1578b76
TM		 4851 err = _nfs4_get_security_label(inode, buf, buflen);
4852 trace_nfs4_get_security_label(inode, err);
4853 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4854 &exception);
4855 } while (exception.retry);
4856 return err;
4857}
4858
4859static int _nfs4_do_set_security_label(struct inode *inode,
4860 struct nfs4_label *ilabel,
4861 struct nfs_fattr *fattr,
4862 struct nfs4_label *olabel)
4863{
4864
4865 struct iattr sattr = {0};
4866 struct nfs_server *server = NFS_SERVER(inode);
4867 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4868 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4869 .fh = NFS_FH(inode),
4870 .iap = &sattr,
4871 .server = server,
4872 .bitmask = bitmask,
4873 .label = ilabel,
4874 };
4875 struct nfs_setattrres res = {
4876 .fattr = fattr,
4877 .label = olabel,
4878 .server = server,
4879 };
4880 struct rpc_message msg = {
4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4882 .rpc_argp = &arg,
aa9c2669
DQ		 4883 .rpc_resp = &res,
4884 };
4885 int status;
4886
12207f69 4887 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4888
12207f69 4889 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4890 if (status)
4891 dprintk("%s failed: %d\n", __func__, status);
4892
4893 return status;
4894}
4895
4896static int nfs4_do_set_security_label(struct inode *inode,
4897 struct nfs4_label *ilabel,
4898 struct nfs_fattr *fattr,
4899 struct nfs4_label *olabel)
4900{
4901 struct nfs4_exception exception = { };
4902 int err;
4903
4904 do {
c1578b76
TM		 4905 err = _nfs4_do_set_security_label(inode, ilabel,
4906 fattr, olabel);
4907 trace_nfs4_set_security_label(inode, err);
4908 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4909 &exception);
4910 } while (exception.retry);
4911 return err;
4912}
4913
4914static int
4915nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4916{
4917 struct nfs4_label ilabel, *olabel = NULL;
4918 struct nfs_fattr fattr;
4919 struct rpc_cred *cred;
2b0143b5 4920 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4921 int status;
4922
4923 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4924 return -EOPNOTSUPP;
4925
4926 nfs_fattr_init(&fattr);
4927
4928 ilabel.pi = 0;
4929 ilabel.lfs = 0;
4930 ilabel.label = (char *)buf;
4931 ilabel.len = buflen;
4932
4933 cred = rpc_lookup_cred();
4934 if (IS_ERR(cred))
4935 return PTR_ERR(cred);
4936
4937 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4938 if (IS_ERR(olabel)) {
4939 status = -PTR_ERR(olabel);
4940 goto out;
4941 }
4942
4943 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4944 if (status == 0)
4945 nfs_setsecurity(inode, &fattr, olabel);
4946
4947 nfs4_label_free(olabel);
4948out:
4949 put_rpccred(cred);
4950 return status;
4951}
4952#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4953
4954
1da177e4 4955static int
8478eaa1
N		 4956nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4957 struct nfs4_state *state, long *timeout)
1da177e4 4958{
aa5190d0
TM		 4959 struct nfs_client *clp = server->nfs_client;
4960
4961 if (task->tk_status >= 0)
1da177e4
LT		 4962 return 0;
4963 switch(task->tk_status) {
a1d0b5ee 4964 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4965 case -NFS4ERR_ADMIN_REVOKED:
4966 case -NFS4ERR_BAD_STATEID:
4967 case -NFS4ERR_OPENMODE:
4968 if (state == NULL)
4969 break;
5d422301 4970 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4971 goto recovery_failed;
0400a6b0 4972 goto wait_on_recovery;
0ced63d1 4973 case -NFS4ERR_EXPIRED:
5d422301
TM		 4974 if (state != NULL) {
4975 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4976 goto recovery_failed;
5d422301 4977 }
1da177e4 4978 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4979 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4980 nfs4_schedule_lease_recovery(clp);
4981 goto wait_on_recovery;
519ae255
CL		 4982 case -NFS4ERR_MOVED:
4983 if (nfs4_schedule_migration_recovery(server) < 0)
4984 goto recovery_failed;
4985 goto wait_on_recovery;
8ef2f8d4
CL		 4986 case -NFS4ERR_LEASE_MOVED:
4987 nfs4_schedule_lease_moved_recovery(clp);
4988 goto wait_on_recovery;
4745e315
AA		 4989#if defined(CONFIG_NFS_V4_1)
4990 case -NFS4ERR_BADSESSION:
4991 case -NFS4ERR_BADSLOT:
4992 case -NFS4ERR_BAD_HIGH_SLOT:
4993 case -NFS4ERR_DEADSESSION:
4994 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4995 case -NFS4ERR_SEQ_FALSE_RETRY:
4996 case -NFS4ERR_SEQ_MISORDERED:
4997 dprintk("%s ERROR %d, Reset session\n", __func__,
4998 task->tk_status);
9f594791 4999 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 5000 goto wait_on_recovery;
4745e315 5001#endif /* CONFIG_NFS_V4_1 */
1da177e4 5002 case -NFS4ERR_DELAY:
aa5190d0 5003 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 5004 rpc_delay(task, nfs4_update_delay(timeout));
5005 goto restart_call;
006ea73e 5006 case -NFS4ERR_GRACE:
1da177e4 5007 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 5008 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 5009 case -NFS4ERR_OLD_STATEID:
f1478c13 5010 goto restart_call;
1da177e4
LT		 5011 }
5012 task->tk_status = nfs4_map_errors(task->tk_status);
5013 return 0;
9f51a78e 5014recovery_failed:
5d422301
TM		 5015 task->tk_status = -EIO;
5016 return 0;
0400a6b0 5017wait_on_recovery:
a2c0b9e2 5018 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 5019 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5020 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 5021 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5022 goto recovery_failed;
f1478c13 5023restart_call:
a2c0b9e2
TM		 5024 task->tk_status = 0;
5025 return -EAGAIN;
1da177e4
LT		 5026}
5027
f092075d
CL		 5028static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5029 nfs4_verifier *bootverf)
cd93710e
CL		 5030{
5031 __be32 verf[2];
5032
2c820d9a
CL		 5033 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5034 /* An impossible timestamp guarantees this value
5035 * will never match a generated boot time. */
5036 verf[0] = 0;
17f26b12 5037 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5038 } else {
f092075d 5039 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5040 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5041 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5042 }
cd93710e
CL		 5043 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5044}
5045
a3192688
JL		 5046static int
5047nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5048{
a3192688
JL		 5049 int result;
5050 size_t len;
5051 char *str;
e984a55a 5052
ceb3a16c 5053 if (clp->cl_owner_id != NULL)
a3192688 5054 return 0;
4a3e5779 5055
a3192688 5056 rcu_read_lock();
4a70316c 5057 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5058 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5059 1 +
5060 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5061 1;
5062 rcu_read_unlock();
5063
5064 if (len > NFS4_OPAQUE_LIMIT + 1)
5065 return -EINVAL;
5066
5067 /*
5068 * Since this string is allocated at mount time, and held until the
5069 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5070 * about a memory-reclaim deadlock.
5071 */
5072 str = kmalloc(len, GFP_KERNEL);
5073 if (!str)
5074 return -ENOMEM;
ceb3a16c 5075
e984a55a 5076 rcu_read_lock();
a3192688
JL		 5077 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5078 clp->cl_ipaddr,
5079 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5080 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5081 rcu_read_unlock();
a3192688 5082
a3192688
JL		 5083 clp->cl_owner_id = str;
5084 return 0;
e984a55a
CL		 5085}
5086
873e3851
JL		 5087static int
5088nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5089{
5090 int result;
5091 size_t len;
5092 char *str;
5093
5094 len = 10 + 10 + 1 + 10 + 1 +
5095 strlen(nfs4_client_id_uniquifier) + 1 +
5096 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5097
5098 if (len > NFS4_OPAQUE_LIMIT + 1)
5099 return -EINVAL;
5100
5101 /*
5102 * Since this string is allocated at mount time, and held until the
5103 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5104 * about a memory-reclaim deadlock.
5105 */
5106 str = kmalloc(len, GFP_KERNEL);
5107 if (!str)
5108 return -ENOMEM;
5109
5110 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5111 clp->rpc_ops->version, clp->cl_minorversion,
5112 nfs4_client_id_uniquifier,
5113 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5114 clp->cl_owner_id = str;
5115 return 0;
5116}
5117
5118static int
5119nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5120{
873e3851
JL		 5121 int result;
5122 size_t len;
5123 char *str;
ceb3a16c
TM		 5124
5125 if (clp->cl_owner_id != NULL)
873e3851 5126 return 0;
6f2ea7f2
CL		 5127
5128 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5129 return nfs4_init_uniquifier_client_string(clp);
5130
5131 len = 10 + 10 + 1 + 10 + 1 +
5132 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5133
5134 if (len > NFS4_OPAQUE_LIMIT + 1)
5135 return -EINVAL;
5136
5137 /*
5138 * Since this string is allocated at mount time, and held until the
5139 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5140 * about a memory-reclaim deadlock.
5141 */
5142 str = kmalloc(len, GFP_KERNEL);
5143 if (!str)
5144 return -ENOMEM;
5145
5146 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5147 clp->rpc_ops->version, clp->cl_minorversion,
5148 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5149 clp->cl_owner_id = str;
5150 return 0;
e984a55a
CL		 5151}
5152
706cb8db
CL		 5153/*
5154 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5155 * services. Advertise one based on the address family of the
5156 * clientaddr.
5157 */
5158static unsigned int
5159nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5160{
5161 if (strchr(clp->cl_ipaddr, ':') != NULL)
5162 return scnprintf(buf, len, "tcp6");
5163 else
5164 return scnprintf(buf, len, "tcp");
5165}
5166
f11b2a1c
JL		 5167static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5168{
5169 struct nfs4_setclientid *sc = calldata;
5170
5171 if (task->tk_status == 0)
5172 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5173}
5174
5175static const struct rpc_call_ops nfs4_setclientid_ops = {
5176 .rpc_call_done = nfs4_setclientid_done,
5177};
5178
6bbb4ae8
CL		 5179/**
5180 * nfs4_proc_setclientid - Negotiate client ID
5181 * @clp: state data structure
5182 * @program: RPC program for NFSv4 callback service
5183 * @port: IP port number for NFS4 callback service
5184 * @cred: RPC credential to use for this call
5185 * @res: where to place the result
5186 *
5187 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5188 */
bb8b27e5
TM		 5189int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5190 unsigned short port, struct rpc_cred *cred,
5191 struct nfs4_setclientid_res *res)
1da177e4
LT		 5192{
5193 nfs4_verifier sc_verifier;
5194 struct nfs4_setclientid setclientid = {
5195 .sc_verifier = &sc_verifier,
5196 .sc_prog = program,
3a6bb738 5197 .sc_clnt = clp,
1da177e4
LT		 5198 };
5199 struct rpc_message msg = {
5200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5201 .rpc_argp = &setclientid,
bb8b27e5 5202 .rpc_resp = res,
286d7d6a 5203 .rpc_cred = cred,
1da177e4 5204 };
f11b2a1c
JL		 5205 struct rpc_task *task;
5206 struct rpc_task_setup task_setup_data = {
5207 .rpc_client = clp->cl_rpcclient,
5208 .rpc_message = &msg,
5209 .callback_ops = &nfs4_setclientid_ops,
5210 .callback_data = &setclientid,
5211 .flags = RPC_TASK_TIMEOUT,
5212 };
6bbb4ae8 5213 int status;
1da177e4 5214
de734831 5215 /* nfs_client_id4 */
f092075d 5216 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5217
5218 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5219 status = nfs4_init_uniform_client_string(clp);
5220 else
a3192688 5221 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5222
5223 if (status)
5224 goto out;
3a6bb738 5225
de734831 5226 /* cb_client4 */
706cb8db
CL		 5227 setclientid.sc_netid_len =
5228 nfs4_init_callback_netid(clp,
5229 setclientid.sc_netid,
5230 sizeof(setclientid.sc_netid));
de734831 5231 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5232 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5233 clp->cl_ipaddr, port >> 8, port & 255);
5234
3a6bb738 5235 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5236 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5237 clp->cl_owner_id);
f11b2a1c
JL		 5238 task = rpc_run_task(&task_setup_data);
5239 if (IS_ERR(task)) {
5240 status = PTR_ERR(task);
5241 goto out;
5242 }
5243 status = task->tk_status;
5244 if (setclientid.sc_cred) {
5245 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5246 put_rpccred(setclientid.sc_cred);
5247 }
5248 rpc_put_task(task);
5249out:
c6d01c6f 5250 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5251 dprintk("NFS reply setclientid: %d\n", status);
5252 return status;
1da177e4
LT		 5253}
5254
6bbb4ae8
CL		 5255/**
5256 * nfs4_proc_setclientid_confirm - Confirm client ID
5257 * @clp: state data structure
5258 * @res: result of a previous SETCLIENTID
5259 * @cred: RPC credential to use for this call
5260 *
5261 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5262 */
fd954ae1 5263int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5264 struct nfs4_setclientid_res *arg,
5265 struct rpc_cred *cred)
1da177e4 5266{
1da177e4
LT		 5267 struct rpc_message msg = {
5268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5269 .rpc_argp = arg,
286d7d6a 5270 .rpc_cred = cred,
1da177e4 5271 };
1da177e4
LT		 5272 int status;
5273
6bbb4ae8
CL		 5274 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5275 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5276 clp->cl_clientid);
1bd714f2 5277 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5278 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5279 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5280 return status;
5281}
5282
fe650407
TM		 5283struct nfs4_delegreturndata {
5284 struct nfs4_delegreturnargs args;
fa178f29 5285 struct nfs4_delegreturnres res;
fe650407
TM		 5286 struct nfs_fh fh;
5287 nfs4_stateid stateid;
26e976a8 5288 unsigned long timestamp;
fa178f29 5289 struct nfs_fattr fattr;
fe650407 5290 int rpc_status;
039b756a
PT		 5291 struct inode *inode;
5292 bool roc;
5293 u32 roc_barrier;
fe650407
TM		 5294};
5295
fe650407
TM		 5296static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5297{
5298 struct nfs4_delegreturndata *data = calldata;
938e1010 5299
14516c3a
TM		 5300 if (!nfs4_sequence_done(task, &data->res.seq_res))
5301 return;
938e1010 5302
ca8acf8d 5303 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5304 switch (task->tk_status) {
79708861 5305 case 0:
fa178f29 5306 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5307 case -NFS4ERR_ADMIN_REVOKED:
5308 case -NFS4ERR_DELEG_REVOKED:
5309 case -NFS4ERR_BAD_STATEID:
5310 case -NFS4ERR_OLD_STATEID:
5311 case -NFS4ERR_STALE_STATEID:
5312 case -NFS4ERR_EXPIRED:
5313 task->tk_status = 0;
039b756a
PT		 5314 if (data->roc)
5315 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5316 break;
79708861 5317 default:
8478eaa1
N		 5318 if (nfs4_async_handle_error(task, data->res.server,
5319 NULL, NULL) == -EAGAIN) {
d00c5d43 5320 rpc_restart_call_prepare(task);
79708861
RL		 5321 return;
5322 }
5323 }
5324 data->rpc_status = task->tk_status;
fe650407
TM		 5325}
5326
5327static void nfs4_delegreturn_release(void *calldata)
5328{
039b756a 5329 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5330 struct inode *inode = data->inode;
039b756a 5331
ea7c38fe
TM		 5332 if (inode) {
5333 if (data->roc)
5334 pnfs_roc_release(inode);
5335 nfs_iput_and_deactive(inode);
5336 }
fe650407
TM		 5337 kfree(calldata);
5338}
5339
938e1010
AA		 5340static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5341{
5342 struct nfs4_delegreturndata *d_data;
5343
5344 d_data = (struct nfs4_delegreturndata *)data;
5345
500d701f
PT		 5346 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5347 return;
5348
4ff376fe
TM		 5349 if (d_data->roc)
5350 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5351
d9afbd1b
TM		 5352 nfs4_setup_sequence(d_data->res.server,
5353 &d_data->args.seq_args,
5354 &d_data->res.seq_res,
5355 task);
938e1010 5356}
938e1010 5357
c8d149f3 5358static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5359 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5360 .rpc_call_done = nfs4_delegreturn_done,
5361 .rpc_release = nfs4_delegreturn_release,
5362};
5363
e6f81075 5364static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5365{
5366 struct nfs4_delegreturndata *data;
fa178f29 5367 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5368 struct rpc_task *task;
5138fde0
TM		 5369 struct rpc_message msg = {
5370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5371 .rpc_cred = cred,
5372 };
c970aa85
TM		 5373 struct rpc_task_setup task_setup_data = {
5374 .rpc_client = server->client,
5138fde0 5375 .rpc_message = &msg,
c970aa85
TM		 5376 .callback_ops = &nfs4_delegreturn_ops,
5377 .flags = RPC_TASK_ASYNC,
5378 };
e6f81075 5379 int status = 0;
fe650407 5380
8535b2be 5381 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5382 if (data == NULL)
5383 return -ENOMEM;
a9c92d6b 5384 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5385 data->args.fhandle = &data->fh;
5386 data->args.stateid = &data->stateid;
9e907fec 5387 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5388 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5389 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5390 data->res.fattr = &data->fattr;
5391 data->res.server = server;
5138fde0 5392 nfs_fattr_init(data->res.fattr);
26e976a8 5393 data->timestamp = jiffies;
fe650407 5394 data->rpc_status = 0;
ea7c38fe
TM		 5395 data->inode = nfs_igrab_and_active(inode);
5396 if (data->inode)
5397 data->roc = nfs4_roc(inode);
fe650407 5398
c970aa85 5399 task_setup_data.callback_data = data;
1174dd1f
TM		 5400 msg.rpc_argp = &data->args;
5401 msg.rpc_resp = &data->res;
c970aa85 5402 task = rpc_run_task(&task_setup_data);
7a1218a2 5403 if (IS_ERR(task))
fe650407 5404 return PTR_ERR(task);
e6f81075
TM		 5405 if (!issync)
5406 goto out;
fe650407 5407 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5408 if (status != 0)
5409 goto out;
5410 status = data->rpc_status;
e144cbcc
TM		 5411 if (status == 0)
5412 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5413 else
5414 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5415out:
e6b3c4db 5416 rpc_put_task(task);
fe650407 5417 return status;
1da177e4
LT		 5418}
5419
e6f81075 5420int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5421{
5422 struct nfs_server *server = NFS_SERVER(inode);
5423 struct nfs4_exception exception = { };
5424 int err;
5425 do {
e6f81075 5426 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5427 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5428 switch (err) {
5429 case -NFS4ERR_STALE_STATEID:
5430 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5431 case 0:
5432 return 0;
5433 }
5434 err = nfs4_handle_exception(server, err, &exception);
5435 } while (exception.retry);
5436 return err;
5437}
5438
5439#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5440#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5441
5442/*
5443 * sleep, with exponential backoff, and retry the LOCK operation.
5444 */
5445static unsigned long
5446nfs4_set_lock_task_retry(unsigned long timeout)
5447{
416ad3c9 5448 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5449 timeout <<= 1;
5450 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5451 return NFS4_LOCK_MAXTIMEOUT;
5452 return timeout;
5453}
5454
1da177e4
LT		 5455static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5456{
5457 struct inode *inode = state->inode;
5458 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5459 struct nfs_client *clp = server->nfs_client;
911d1aaf 5460 struct nfs_lockt_args arg = {
1da177e4 5461 .fh = NFS_FH(inode),
911d1aaf 5462 .fl = request,
1da177e4 5463 };
911d1aaf
TM		 5464 struct nfs_lockt_res res = {
5465 .denied = request,
1da177e4
LT		 5466 };
5467 struct rpc_message msg = {
5468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5469 .rpc_argp = &arg,
5470 .rpc_resp = &res,
5471 .rpc_cred = state->owner->so_cred,
5472 };
1da177e4
LT		 5473 struct nfs4_lock_state *lsp;
5474 int status;
5475
911d1aaf 5476 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5477 status = nfs4_set_lock_state(state, request);
5478 if (status != 0)
5479 goto out;
5480 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5481 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5482 arg.lock_owner.s_dev = server->s_dev;
7c513058 5483 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5484 switch (status) {
5485 case 0:
5486 request->fl_type = F_UNLCK;
5487 break;
5488 case -NFS4ERR_DENIED:
5489 status = 0;
1da177e4 5490 }
70cc6487 5491 request->fl_ops->fl_release_private(request);
a6f951dd 5492 request->fl_ops = NULL;
8d0a8a9d 5493out:
1da177e4
LT		 5494 return status;
5495}
5496
5497static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5498{
5499 struct nfs4_exception exception = { };
5500 int err;
5501
5502 do {
d1b748a5
TM		 5503 err = _nfs4_proc_getlk(state, cmd, request);
5504 trace_nfs4_get_lock(request, state, cmd, err);
5505 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5506 &exception);
5507 } while (exception.retry);
5508 return err;
5509}
5510
83bfff23 5511static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5512{
5513 int res = 0;
5514 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5515 case FL_POSIX:
83bfff23 5516 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5517 break;
5518 case FL_FLOCK:
83bfff23 5519 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5520 break;
5521 default:
5522 BUG();
5523 }
1da177e4
LT		 5524 return res;
5525}
5526
faf5f49c 5527struct nfs4_unlockdata {
911d1aaf
TM		 5528 struct nfs_locku_args arg;
5529 struct nfs_locku_res res;
faf5f49c
TM		 5530 struct nfs4_lock_state *lsp;
5531 struct nfs_open_context *ctx;
911d1aaf
TM		 5532 struct file_lock fl;
5533 const struct nfs_server *server;
26e976a8 5534 unsigned long timestamp;
faf5f49c
TM		 5535};
5536
911d1aaf
TM		 5537static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5538 struct nfs_open_context *ctx,
5539 struct nfs4_lock_state *lsp,
5540 struct nfs_seqid *seqid)
5541{
5542 struct nfs4_unlockdata *p;
5543 struct inode *inode = lsp->ls_state->inode;
5544
8535b2be 5545 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5546 if (p == NULL)
5547 return NULL;
5548 p->arg.fh = NFS_FH(inode);
5549 p->arg.fl = &p->fl;
5550 p->arg.seqid = seqid;
c1d51931 5551 p->res.seqid = seqid;
911d1aaf
TM		 5552 p->lsp = lsp;
5553 atomic_inc(&lsp->ls_count);
5554 /* Ensure we don't close file until we're done freeing locks! */
5555 p->ctx = get_nfs_open_context(ctx);
5556 memcpy(&p->fl, fl, sizeof(p->fl));
5557 p->server = NFS_SERVER(inode);
5558 return p;
5559}
5560
06f814a3 5561static void nfs4_locku_release_calldata(void *data)
faf5f49c 5562{
963d8fe5 5563 struct nfs4_unlockdata *calldata = data;
911d1aaf 5564 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5565 nfs4_put_lock_state(calldata->lsp);
5566 put_nfs_open_context(calldata->ctx);
5567 kfree(calldata);
faf5f49c
TM		 5568}
5569
963d8fe5 5570static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5571{
963d8fe5 5572 struct nfs4_unlockdata *calldata = data;
faf5f49c 5573
14516c3a
TM		 5574 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5575 return;
faf5f49c
TM		 5576 switch (task->tk_status) {
5577 case 0:
26e976a8 5578 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5579 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5580 if (nfs4_update_lock_stateid(calldata->lsp,
5581 &calldata->res.stateid))
5582 break;
9e33bed5
TM		 5583 case -NFS4ERR_BAD_STATEID:
5584 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5585 case -NFS4ERR_STALE_STATEID:
5586 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5587 if (!nfs4_stateid_match(&calldata->arg.stateid,
5588 &calldata->lsp->ls_stateid))
5589 rpc_restart_call_prepare(task);
faf5f49c
TM		 5590 break;
5591 default:
8478eaa1
N		 5592 if (nfs4_async_handle_error(task, calldata->server,
5593 NULL, NULL) == -EAGAIN)
d00c5d43 5594 rpc_restart_call_prepare(task);
faf5f49c 5595 }
2b1bc308 5596 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5597}
5598
4ce70ada 5599static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5600{
4ce70ada 5601 struct nfs4_unlockdata *calldata = data;
faf5f49c 5602
911d1aaf 5603 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5604 goto out_wait;
425c1d4e 5605 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5606 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5607 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5608 goto out_no_action;
faf5f49c 5609 }
26e976a8 5610 calldata->timestamp = jiffies;
035168ab 5611 if (nfs4_setup_sequence(calldata->server,
a893693c 5612 &calldata->arg.seq_args,
2240a9e2
TM		 5613 &calldata->res.seq_res,
5614 task) != 0)
5615 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5616 return;
5617out_no_action:
5618 task->tk_action = NULL;
5619out_wait:
5620 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5621}
5622
963d8fe5 5623static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5624 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5625 .rpc_call_done = nfs4_locku_done,
06f814a3 5626 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5627};
5628
a5d16a4d
TM		 5629static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5630 struct nfs_open_context *ctx,
5631 struct nfs4_lock_state *lsp,
5632 struct nfs_seqid *seqid)
5633{
5634 struct nfs4_unlockdata *data;
5138fde0
TM		 5635 struct rpc_message msg = {
5636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5637 .rpc_cred = ctx->cred,
5638 };
c970aa85
TM		 5639 struct rpc_task_setup task_setup_data = {
5640 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5641 .rpc_message = &msg,
c970aa85 5642 .callback_ops = &nfs4_locku_ops,
101070ca 5643 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5644 .flags = RPC_TASK_ASYNC,
5645 };
a5d16a4d 5646
fa940720
WAA		 5647 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5648 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5649
137d6aca
FF		 5650 /* Ensure this is an unlock - when canceling a lock, the
5651 * canceled lock is passed in, and it won't be an unlock.
5652 */
5653 fl->fl_type = F_UNLCK;
5654
a5d16a4d
TM		 5655 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5656 if (data == NULL) {
5657 nfs_free_seqid(seqid);
5658 return ERR_PTR(-ENOMEM);
5659 }
5660
a9c92d6b 5661 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5662 msg.rpc_argp = &data->arg;
5663 msg.rpc_resp = &data->res;
c970aa85
TM		 5664 task_setup_data.callback_data = data;
5665 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5666}
5667
faf5f49c
TM		 5668static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5669{
65b62a29
TM		 5670 struct inode *inode = state->inode;
5671 struct nfs4_state_owner *sp = state->owner;
5672 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5673 struct nfs_seqid *seqid;
1da177e4 5674 struct nfs4_lock_state *lsp;
06f814a3 5675 struct rpc_task *task;
b4019c0e 5676 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5677 int status = 0;
536ff0f8 5678 unsigned char fl_flags = request->fl_flags;
faf5f49c 5679
8d0a8a9d 5680 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5681 /* Unlock _before_ we do the RPC call */
5682 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5683 /* Exclude nfs_delegation_claim_locks() */
5684 mutex_lock(&sp->so_delegreturn_mutex);
5685 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5686 down_read(&nfsi->rwsem);
83bfff23 5687 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5688 up_read(&nfsi->rwsem);
65b62a29 5689 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5690 goto out;
19e03c57
TM		 5691 }
5692 up_read(&nfsi->rwsem);
65b62a29 5693 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5694 if (status != 0)
9b073574
TM		 5695 goto out;
5696 /* Is this a delegated lock? */
8d0a8a9d 5697 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5698 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5699 goto out;
b4019c0e
TM		 5700 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5701 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5702 status = -ENOMEM;
badc76dd 5703 if (IS_ERR(seqid))
9b073574 5704 goto out;
cd3758e3 5705 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5706 status = PTR_ERR(task);
5707 if (IS_ERR(task))
9b073574 5708 goto out;
a5d16a4d 5709 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5710 rpc_put_task(task);
9b073574 5711out:
536ff0f8 5712 request->fl_flags = fl_flags;
d1b748a5 5713 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5714 return status;
5715}
5716
a5d16a4d
TM		 5717struct nfs4_lockdata {
5718 struct nfs_lock_args arg;
5719 struct nfs_lock_res res;
5720 struct nfs4_lock_state *lsp;
5721 struct nfs_open_context *ctx;
5722 struct file_lock fl;
26e976a8 5723 unsigned long timestamp;
a5d16a4d
TM		 5724 int rpc_status;
5725 int cancelled;
66179efe 5726 struct nfs_server *server;
a5d16a4d
TM		 5727};
5728
5729static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5730 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5731 gfp_t gfp_mask)
1da177e4 5732{
a5d16a4d
TM		 5733 struct nfs4_lockdata *p;
5734 struct inode *inode = lsp->ls_state->inode;
1da177e4 5735 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5736 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5737
8535b2be 5738 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5739 if (p == NULL)
5740 return NULL;
5741
5742 p->arg.fh = NFS_FH(inode);
5743 p->arg.fl = &p->fl;
8535b2be 5744 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5745 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5746 goto out_free;
b4019c0e
TM		 5747 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5748 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5749 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5750 goto out_free_seqid;
7539bbab 5751 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5752 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5753 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5754 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5755 p->lsp = lsp;
66179efe 5756 p->server = server;
a5d16a4d
TM		 5757 atomic_inc(&lsp->ls_count);
5758 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5759 get_file(fl->fl_file);
a5d16a4d
TM		 5760 memcpy(&p->fl, fl, sizeof(p->fl));
5761 return p;
2f74c0a0
TM		 5762out_free_seqid:
5763 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5764out_free:
5765 kfree(p);
5766 return NULL;
5767}
5768
5769static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5770{
5771 struct nfs4_lockdata *data = calldata;
5772 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5773
3110ff80 5774 dprintk("%s: begin!\n", __func__);
2f74c0a0 5775 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5776 goto out_wait;
a5d16a4d 5777 /* Do we need to do an open_to_lock_owner? */
6b447539 5778 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5779 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5780 goto out_release_lock_seqid;
8fe72bac 5781 }
425c1d4e
TM		 5782 nfs4_stateid_copy(&data->arg.open_stateid,
5783 &state->open_stateid);
a5d16a4d 5784 data->arg.new_lock_owner = 1;
c1d51931 5785 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5786 } else {
2f74c0a0 5787 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5788 nfs4_stateid_copy(&data->arg.lock_stateid,
5789 &data->lsp->ls_stateid);
5790 }
5d422301
TM		 5791 if (!nfs4_valid_open_stateid(state)) {
5792 data->rpc_status = -EBADF;
5793 task->tk_action = NULL;
5794 goto out_release_open_seqid;
5795 }
26e976a8 5796 data->timestamp = jiffies;
035168ab
TM		 5797 if (nfs4_setup_sequence(data->server,
5798 &data->arg.seq_args,
2240a9e2 5799 &data->res.seq_res,
d9afbd1b 5800 task) == 0)
66179efe 5801 return;
5d422301 5802out_release_open_seqid:
2240a9e2
TM		 5803 nfs_release_seqid(data->arg.open_seqid);
5804out_release_lock_seqid:
5805 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5806out_wait:
5807 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5808 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5809}
5810
a5d16a4d
TM		 5811static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5812{
5813 struct nfs4_lockdata *data = calldata;
39071e6f 5814 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5815
3110ff80 5816 dprintk("%s: begin!\n", __func__);
a5d16a4d 5817
14516c3a
TM		 5818 if (!nfs4_sequence_done(task, &data->res.seq_res))
5819 return;
66179efe 5820
a5d16a4d 5821 data->rpc_status = task->tk_status;
425c1d4e
TM		 5822 switch (task->tk_status) {
5823 case 0:
2b0143b5 5824 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5825 data->timestamp);
c69899a1
TM		 5826 if (data->arg.new_lock) {
5827 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5828 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5829 rpc_restart_call_prepare(task);
5830 break;
5831 }
5832 }
39071e6f
TM		 5833 if (data->arg.new_lock_owner != 0) {
5834 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5835 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5836 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5837 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5838 rpc_restart_call_prepare(task);
425c1d4e
TM		 5839 break;
5840 case -NFS4ERR_BAD_STATEID:
5841 case -NFS4ERR_OLD_STATEID:
5842 case -NFS4ERR_STALE_STATEID:
5843 case -NFS4ERR_EXPIRED:
5844 if (data->arg.new_lock_owner != 0) {
5845 if (!nfs4_stateid_match(&data->arg.open_stateid,
5846 &lsp->ls_state->open_stateid))
5847 rpc_restart_call_prepare(task);
5848 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5849 &lsp->ls_stateid))
5850 rpc_restart_call_prepare(task);
a5d16a4d 5851 }
3110ff80 5852 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5853}
5854
5855static void nfs4_lock_release(void *calldata)
5856{
5857 struct nfs4_lockdata *data = calldata;
5858
3110ff80 5859 dprintk("%s: begin!\n", __func__);
2f74c0a0 5860 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5861 if (data->cancelled != 0) {
5862 struct rpc_task *task;
5863 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5864 data->arg.lock_seqid);
5865 if (!IS_ERR(task))
bf294b41 5866 rpc_put_task_async(task);
3110ff80 5867 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5868 } else
5869 nfs_free_seqid(data->arg.lock_seqid);
5870 nfs4_put_lock_state(data->lsp);
5871 put_nfs_open_context(data->ctx);
feaff8e5 5872 fput(data->fl.fl_file);
a5d16a4d 5873 kfree(data);
3110ff80 5874 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5875}
5876
5877static const struct rpc_call_ops nfs4_lock_ops = {
5878 .rpc_call_prepare = nfs4_lock_prepare,
5879 .rpc_call_done = nfs4_lock_done,
5880 .rpc_release = nfs4_lock_release,
5881};
5882
2bee72a6
TM		 5883static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5884{
2bee72a6
TM		 5885 switch (error) {
5886 case -NFS4ERR_ADMIN_REVOKED:
5887 case -NFS4ERR_BAD_STATEID:
ecac799a 5888 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5889 if (new_lock_owner != 0 ||
795a88c9 5890 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5891 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5892 break;
5893 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5894 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5895 case -NFS4ERR_EXPIRED:
5896 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5897 };
5898}
5899
afe6c27c 5900static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5901{
5902 struct nfs4_lockdata *data;
5903 struct rpc_task *task;
5138fde0
TM		 5904 struct rpc_message msg = {
5905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5906 .rpc_cred = state->owner->so_cred,
5907 };
c970aa85
TM		 5908 struct rpc_task_setup task_setup_data = {
5909 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5910 .rpc_message = &msg,
c970aa85 5911 .callback_ops = &nfs4_lock_ops,
101070ca 5912 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5913 .flags = RPC_TASK_ASYNC,
5914 };
a5d16a4d
TM		 5915 int ret;
5916
3110ff80 5917 dprintk("%s: begin!\n", __func__);
cd3758e3 5918 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5919 fl->fl_u.nfs4_fl.owner,
5920 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5921 if (data == NULL)
5922 return -ENOMEM;
5923 if (IS_SETLKW(cmd))
5924 data->arg.block = 1;
a9c92d6b 5925 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5926 msg.rpc_argp = &data->arg;
5927 msg.rpc_resp = &data->res;
c970aa85 5928 task_setup_data.callback_data = data;
8fe72bac
TM		 5929 if (recovery_type > NFS_LOCK_NEW) {
5930 if (recovery_type == NFS_LOCK_RECLAIM)
5931 data->arg.reclaim = NFS_LOCK_RECLAIM;
5932 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5933 } else
5934 data->arg.new_lock = 1;
c970aa85 5935 task = rpc_run_task(&task_setup_data);
7a1218a2 5936 if (IS_ERR(task))
a5d16a4d 5937 return PTR_ERR(task);
a5d16a4d
TM		 5938 ret = nfs4_wait_for_completion_rpc_task(task);
5939 if (ret == 0) {
5940 ret = data->rpc_status;
2bee72a6
TM		 5941 if (ret)
5942 nfs4_handle_setlk_error(data->server, data->lsp,
5943 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5944 } else
5945 data->cancelled = 1;
e6b3c4db 5946 rpc_put_task(task);
3110ff80 5947 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5948 return ret;
1da177e4
LT		 5949}
5950
5951static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5952{
202b50dc 5953 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5954 struct nfs4_exception exception = {
5955 .inode = state->inode,
5956 };
202b50dc
TM		 5957 int err;
5958
5959 do {
42a2d13e
TM		 5960 /* Cache the lock if possible... */
5961 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5962 return 0;
afe6c27c 5963 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5964 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5965 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5966 break;
5967 nfs4_handle_exception(server, err, &exception);
5968 } while (exception.retry);
5969 return err;
1da177e4
LT		 5970}
5971
5972static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5973{
202b50dc 5974 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5975 struct nfs4_exception exception = {
5976 .inode = state->inode,
5977 };
202b50dc
TM		 5978 int err;
5979
6bfc93ef
TM		 5980 err = nfs4_set_lock_state(state, request);
5981 if (err != 0)
5982 return err;
f6de7a39 5983 if (!recover_lost_locks) {
ef1820f9
N		 5984 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5985 return 0;
5986 }
202b50dc 5987 do {
42a2d13e
TM		 5988 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5989 return 0;
afe6c27c 5990 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5991 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5992 switch (err) {
5993 default:
5994 goto out;
5995 case -NFS4ERR_GRACE:
5996 case -NFS4ERR_DELAY:
5997 nfs4_handle_exception(server, err, &exception);
5998 err = 0;
5999 }
202b50dc 6000 } while (exception.retry);
a9ed2e25 6001out:
202b50dc 6002 return err;
1da177e4
LT		 6003}
6004
f062eb6c 6005#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6006/**
6007 * nfs41_check_expired_locks - possibly free a lock stateid
6008 *
6009 * @state: NFSv4 state for an inode
6010 *
6011 * Returns NFS_OK if recovery for this stateid is now finished.
6012 * Otherwise a negative NFS4ERR value is returned.
6013 */
b01dd1d8 6014static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6015{
eb64cf96 6016 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6017 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6018 struct nfs_server *server = NFS_SERVER(state->inode);
6019
b01dd1d8 6020 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6021 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6022 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6023
6024 status = nfs41_test_stateid(server,
6025 &lsp->ls_stateid,
6026 cred);
08cb47fa 6027 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6028 if (status != NFS_OK) {
3e60ffdd
CL		 6029 /* Free the stateid unless the server
6030 * informs us the stateid is unrecognized. */
89af2739
CL		 6031 if (status != -NFS4ERR_BAD_STATEID)
6032 nfs41_free_stateid(server,
ab7cb0df
TM		 6033 &lsp->ls_stateid,
6034 cred);
795a88c9 6035 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6036 ret = status;
6037 }
6038 }
6039 };
6040
6041 return ret;
6042}
6043
6044static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6045{
6046 int status = NFS_OK;
6047
6048 if (test_bit(LK_STATE_IN_USE, &state->flags))
6049 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6050 if (status != NFS_OK)
6051 status = nfs4_lock_expired(state, request);
6052 return status;
f062eb6c
BS		 6053}
6054#endif
6055
1da177e4
LT		 6056static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6057{
19e03c57 6058 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6059 unsigned char fl_flags = request->fl_flags;
8e469ebd 6060 int status = -ENOLCK;
1da177e4 6061
8e469ebd
TM		 6062 if ((fl_flags & FL_POSIX) &&
6063 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6064 goto out;
6bfc93ef 6065 /* Is this a delegated open? */
6bfc93ef
TM		 6066 status = nfs4_set_lock_state(state, request);
6067 if (status != 0)
6068 goto out;
01c3b861 6069 request->fl_flags |= FL_ACCESS;
83bfff23 6070 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6071 if (status < 0)
6072 goto out;
19e03c57 6073 down_read(&nfsi->rwsem);
01c3b861 6074 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6075 /* Yes: cache locks! */
01c3b861 6076 /* ...but avoid races with delegation recall... */
19e03c57 6077 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6078 status = do_vfs_lock(state->inode, request);
c69899a1 6079 up_read(&nfsi->rwsem);
9a99af49 6080 goto out;
9a99af49 6081 }
19e03c57 6082 up_read(&nfsi->rwsem);
c69899a1 6083 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6084out:
6085 request->fl_flags = fl_flags;
1da177e4
LT		 6086 return status;
6087}
6088
6089static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6090{
a1d0b5ee
TM		 6091 struct nfs4_exception exception = {
6092 .state = state,
05ffe24f 6093 .inode = state->inode,
a1d0b5ee 6094 };
1da177e4
LT		 6095 int err;
6096
6097 do {
965b5d67 6098 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6099 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6100 if (err == -NFS4ERR_DENIED)
6101 err = -EAGAIN;
1da177e4 6102 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6103 err, &exception);
1da177e4
LT		 6104 } while (exception.retry);
6105 return err;
6106}
6107
6108static int
6109nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6110{
6111 struct nfs_open_context *ctx;
6112 struct nfs4_state *state;
6113 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6114 int status;
6115
6116 /* verify open state */
cd3758e3 6117 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6118 state = ctx->state;
6119
6120 if (request->fl_start < 0 || request->fl_end < 0)
6121 return -EINVAL;
6122
d953126a
TM		 6123 if (IS_GETLK(cmd)) {
6124 if (state != NULL)
6125 return nfs4_proc_getlk(state, F_GETLK, request);
6126 return 0;
6127 }
1da177e4
LT		 6128
6129 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6130 return -EINVAL;
6131
d953126a
TM		 6132 if (request->fl_type == F_UNLCK) {
6133 if (state != NULL)
6134 return nfs4_proc_unlck(state, cmd, request);
6135 return 0;
6136 }
1da177e4 6137
d953126a
TM		 6138 if (state == NULL)
6139 return -ENOLCK;
55725513
TM		 6140 /*
6141 * Don't rely on the VFS having checked the file open mode,
6142 * since it won't do this for flock() locks.
6143 */
f44106e2 6144 switch (request->fl_type) {
55725513
TM		 6145 case F_RDLCK:
6146 if (!(filp->f_mode & FMODE_READ))
6147 return -EBADF;
6148 break;
6149 case F_WRLCK:
6150 if (!(filp->f_mode & FMODE_WRITE))
6151 return -EBADF;
6152 }
6153
1da177e4
LT		 6154 do {
6155 status = nfs4_proc_setlk(state, cmd, request);
6156 if ((status != -EAGAIN) || IS_SETLK(cmd))
6157 break;
6158 timeout = nfs4_set_lock_task_retry(timeout);
6159 status = -ERESTARTSYS;
6160 if (signalled())
6161 break;
6162 } while(status < 0);
1da177e4
LT		 6163 return status;
6164}
6165
db4f2e63 6166int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6167{
6168 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6169 int err;
6170
6171 err = nfs4_set_lock_state(state, fl);
6172 if (err != 0)
db4f2e63 6173 return err;
4a706fa0 6174 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6175 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6176}
6b3b5496 6177
cf470c3e
TM		 6178struct nfs_release_lockowner_data {
6179 struct nfs4_lock_state *lsp;
5ae67c4f 6180 struct nfs_server *server;
cf470c3e 6181 struct nfs_release_lockowner_args args;
b7e63a10 6182 struct nfs_release_lockowner_res res;
60ea6812 6183 unsigned long timestamp;
cf470c3e
TM		 6184};
6185
fbd4bfd1
CL		 6186static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6187{
6188 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6189 struct nfs_server *server = data->server;
cb04ad2a
PT		 6190 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6191 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6192 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6193 data->timestamp = jiffies;
fbd4bfd1
CL		 6194}
6195
6196static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6197{
6198 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6199 struct nfs_server *server = data->server;
6200
b7e63a10 6201 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6202
6203 switch (task->tk_status) {
6204 case 0:
6205 renew_lease(server, data->timestamp);
6206 break;
6207 case -NFS4ERR_STALE_CLIENTID:
6208 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6209 nfs4_schedule_lease_recovery(server->nfs_client);
6210 break;
60ea6812
CL		 6211 case -NFS4ERR_LEASE_MOVED:
6212 case -NFS4ERR_DELAY:
8478eaa1
N		 6213 if (nfs4_async_handle_error(task, server,
6214 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6215 rpc_restart_call_prepare(task);
6216 }
fbd4bfd1
CL		 6217}
6218
d3c7b7cc
TM		 6219static void nfs4_release_lockowner_release(void *calldata)
6220{
cf470c3e 6221 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6222 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6223 kfree(calldata);
6224}
6225
17280175 6226static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6227 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6228 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6229 .rpc_release = nfs4_release_lockowner_release,
6230};
6231
f1cdae87
JL		 6232static void
6233nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6234{
cf470c3e 6235 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6236 struct rpc_message msg = {
6237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6238 };
6239
6240 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6241 return;
fbd4bfd1 6242
cf470c3e
TM		 6243 data = kmalloc(sizeof(*data), GFP_NOFS);
6244 if (!data)
f1cdae87 6245 return;
cf470c3e 6246 data->lsp = lsp;
5ae67c4f 6247 data->server = server;
cf470c3e
TM		 6248 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6249 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6250 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6251
cf470c3e 6252 msg.rpc_argp = &data->args;
b7e63a10
TM		 6253 msg.rpc_resp = &data->res;
6254 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6255 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6256}
6257
aa1870af
BF		 6258#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6259
64c2ce8b
AK		 6260static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6261 const void *buf, size_t buflen,
6262 int flags, int type)
6b3b5496 6263{
64c2ce8b
AK		 6264 if (strcmp(key, "") != 0)
6265 return -EINVAL;
4b580ee3 6266
2b0143b5 6267 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6268}
6269
64c2ce8b
AK		 6270static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6271 void *buf, size_t buflen, int type)
6b3b5496 6272{
64c2ce8b
AK		 6273 if (strcmp(key, "") != 0)
6274 return -EINVAL;
aa1870af 6275
2b0143b5 6276 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6277}
6278
64c2ce8b
AK		 6279static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6280 size_t list_len, const char *name,
6281 size_t name_len, int type)
6b3b5496 6282{
64c2ce8b 6283 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6284
2b0143b5 6285 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6286 return 0;
64c2ce8b
AK		 6287
6288 if (list && len <= list_len)
6289 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6290 return len;
6b3b5496
BF		 6291}
6292
c9bccef6
DQ		 6293#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6294static inline int nfs4_server_supports_labels(struct nfs_server *server)
6295{
6296 return server->caps & NFS_CAP_SECURITY_LABEL;
6297}
6298
6299static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6300 const void *buf, size_t buflen,
6301 int flags, int type)
6302{
6303 if (security_ismaclabel(key))
6304 return nfs4_set_security_label(dentry, buf, buflen);
6305
6306 return -EOPNOTSUPP;
6307}
6308
6309static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6310 void *buf, size_t buflen, int type)
6311{
6312 if (security_ismaclabel(key))
2b0143b5 6313 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6314 return -EOPNOTSUPP;
6315}
6316
6317static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6318 size_t list_len, const char *name,
6319 size_t name_len, int type)
6320{
6321 size_t len = 0;
6322
2b0143b5
DH		 6323 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6324 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6325 if (list && len <= list_len)
2b0143b5 6326 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6327 }
6328 return len;
6329}
6330
6331static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6332 .prefix = XATTR_SECURITY_PREFIX,
6333 .list = nfs4_xattr_list_nfs4_label,
6334 .get = nfs4_xattr_get_nfs4_label,
6335 .set = nfs4_xattr_set_nfs4_label,
6336};
6337#endif
6338
6339
533eb461
AA		 6340/*
6341 * nfs_fhget will use either the mounted_on_fileid or the fileid
6342 */
69aaaae1
TM		 6343static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6344{
533eb461
AA		 6345 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6346 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6347 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6348 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6349 return;
6350
6351 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6352 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6353 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6354 fattr->nlink = 2;
6355}
6356
f05d147f
BS		 6357static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6358 const struct qstr *name,
6359 struct nfs4_fs_locations *fs_locations,
6360 struct page *page)
683b57b4
TM		 6361{
6362 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6363 u32 bitmask[3] = {
361e624f 6364 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6365 };
6366 struct nfs4_fs_locations_arg args = {
6367 .dir_fh = NFS_FH(dir),
c228fd3a 6368 .name = name,
683b57b4
TM		 6369 .page = page,
6370 .bitmask = bitmask,
6371 };
22958463
BH		 6372 struct nfs4_fs_locations_res res = {
6373 .fs_locations = fs_locations,
6374 };
683b57b4
TM		 6375 struct rpc_message msg = {
6376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6377 .rpc_argp = &args,
22958463 6378 .rpc_resp = &res,
683b57b4
TM		 6379 };
6380 int status;
6381
3110ff80 6382 dprintk("%s: start\n", __func__);
533eb461
AA		 6383
6384 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6385 * is not supported */
6386 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6387 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6388 else
6389 bitmask[0] |= FATTR4_WORD0_FILEID;
6390
c228fd3a 6391 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6392 fs_locations->server = server;
830b8e33 6393 fs_locations->nlocations = 0;
f05d147f 6394 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6395 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6396 return status;
6397}
6398
f05d147f
BS		 6399int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6400 const struct qstr *name,
6401 struct nfs4_fs_locations *fs_locations,
6402 struct page *page)
db0a9593
BS		 6403{
6404 struct nfs4_exception exception = { };
6405 int err;
6406 do {
078ea3df
TM		 6407 err = _nfs4_proc_fs_locations(client, dir, name,
6408 fs_locations, page);
6409 trace_nfs4_get_fs_locations(dir, name, err);
6410 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6411 &exception);
6412 } while (exception.retry);
6413 return err;
6414}
6415
b03d735b
CL		 6416/*
6417 * This operation also signals the server that this client is
6418 * performing migration recovery. The server can stop returning
6419 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6420 * appended to this compound to identify the client ID which is
6421 * performing recovery.
6422 */
6423static int _nfs40_proc_get_locations(struct inode *inode,
6424 struct nfs4_fs_locations *locations,
6425 struct page *page, struct rpc_cred *cred)
6426{
6427 struct nfs_server *server = NFS_SERVER(inode);
6428 struct rpc_clnt *clnt = server->client;
6429 u32 bitmask[2] = {
6430 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6431 };
6432 struct nfs4_fs_locations_arg args = {
6433 .clientid = server->nfs_client->cl_clientid,
6434 .fh = NFS_FH(inode),
6435 .page = page,
6436 .bitmask = bitmask,
6437 .migration = 1, /* skip LOOKUP */
6438 .renew = 1, /* append RENEW */
6439 };
6440 struct nfs4_fs_locations_res res = {
6441 .fs_locations = locations,
6442 .migration = 1,
6443 .renew = 1,
6444 };
6445 struct rpc_message msg = {
6446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6447 .rpc_argp = &args,
6448 .rpc_resp = &res,
6449 .rpc_cred = cred,
6450 };
6451 unsigned long now = jiffies;
6452 int status;
6453
6454 nfs_fattr_init(&locations->fattr);
6455 locations->server = server;
6456 locations->nlocations = 0;
6457
6458 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6459 nfs4_set_sequence_privileged(&args.seq_args);
6460 status = nfs4_call_sync_sequence(clnt, server, &msg,
6461 &args.seq_args, &res.seq_res);
6462 if (status)
6463 return status;
6464
6465 renew_lease(server, now);
6466 return 0;
6467}
6468
6469#ifdef CONFIG_NFS_V4_1
6470
6471/*
6472 * This operation also signals the server that this client is
6473 * performing migration recovery. The server can stop asserting
6474 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6475 * performing this operation is identified in the SEQUENCE
6476 * operation in this compound.
6477 *
6478 * When the client supports GETATTR(fs_locations_info), it can
6479 * be plumbed in here.
6480 */
6481static int _nfs41_proc_get_locations(struct inode *inode,
6482 struct nfs4_fs_locations *locations,
6483 struct page *page, struct rpc_cred *cred)
6484{
6485 struct nfs_server *server = NFS_SERVER(inode);
6486 struct rpc_clnt *clnt = server->client;
6487 u32 bitmask[2] = {
6488 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6489 };
6490 struct nfs4_fs_locations_arg args = {
6491 .fh = NFS_FH(inode),
6492 .page = page,
6493 .bitmask = bitmask,
6494 .migration = 1, /* skip LOOKUP */
6495 };
6496 struct nfs4_fs_locations_res res = {
6497 .fs_locations = locations,
6498 .migration = 1,
6499 };
6500 struct rpc_message msg = {
6501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6502 .rpc_argp = &args,
6503 .rpc_resp = &res,
6504 .rpc_cred = cred,
6505 };
6506 int status;
6507
6508 nfs_fattr_init(&locations->fattr);
6509 locations->server = server;
6510 locations->nlocations = 0;
6511
6512 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6513 nfs4_set_sequence_privileged(&args.seq_args);
6514 status = nfs4_call_sync_sequence(clnt, server, &msg,
6515 &args.seq_args, &res.seq_res);
6516 if (status == NFS4_OK &&
6517 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6518 status = -NFS4ERR_LEASE_MOVED;
6519 return status;
6520}
6521
6522#endif /* CONFIG_NFS_V4_1 */
6523
6524/**
6525 * nfs4_proc_get_locations - discover locations for a migrated FSID
6526 * @inode: inode on FSID that is migrating
6527 * @locations: result of query
6528 * @page: buffer
6529 * @cred: credential to use for this operation
6530 *
6531 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6532 * operation failed, or a negative errno if a local error occurred.
6533 *
6534 * On success, "locations" is filled in, but if the server has
6535 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6536 * asserted.
6537 *
6538 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6539 * from this client that require migration recovery.
6540 */
6541int nfs4_proc_get_locations(struct inode *inode,
6542 struct nfs4_fs_locations *locations,
6543 struct page *page, struct rpc_cred *cred)
6544{
6545 struct nfs_server *server = NFS_SERVER(inode);
6546 struct nfs_client *clp = server->nfs_client;
6547 const struct nfs4_mig_recovery_ops *ops =
6548 clp->cl_mvops->mig_recovery_ops;
6549 struct nfs4_exception exception = { };
6550 int status;
6551
6552 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6553 (unsigned long long)server->fsid.major,
6554 (unsigned long long)server->fsid.minor,
6555 clp->cl_hostname);
6556 nfs_display_fhandle(NFS_FH(inode), __func__);
6557
6558 do {
6559 status = ops->get_locations(inode, locations, page, cred);
6560 if (status != -NFS4ERR_DELAY)
6561 break;
6562 nfs4_handle_exception(server, status, &exception);
6563 } while (exception.retry);
6564 return status;
6565}
6566
44c99933
CL		 6567/*
6568 * This operation also signals the server that this client is
6569 * performing "lease moved" recovery. The server can stop
6570 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6571 * is appended to this compound to identify the client ID which is
6572 * performing recovery.
6573 */
6574static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6575{
6576 struct nfs_server *server = NFS_SERVER(inode);
6577 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6578 struct rpc_clnt *clnt = server->client;
6579 struct nfs4_fsid_present_arg args = {
6580 .fh = NFS_FH(inode),
6581 .clientid = clp->cl_clientid,
6582 .renew = 1, /* append RENEW */
6583 };
6584 struct nfs4_fsid_present_res res = {
6585 .renew = 1,
6586 };
6587 struct rpc_message msg = {
6588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6589 .rpc_argp = &args,
6590 .rpc_resp = &res,
6591 .rpc_cred = cred,
6592 };
6593 unsigned long now = jiffies;
6594 int status;
6595
6596 res.fh = nfs_alloc_fhandle();
6597 if (res.fh == NULL)
6598 return -ENOMEM;
6599
6600 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6601 nfs4_set_sequence_privileged(&args.seq_args);
6602 status = nfs4_call_sync_sequence(clnt, server, &msg,
6603 &args.seq_args, &res.seq_res);
6604 nfs_free_fhandle(res.fh);
6605 if (status)
6606 return status;
6607
6608 do_renew_lease(clp, now);
6609 return 0;
6610}
6611
6612#ifdef CONFIG_NFS_V4_1
6613
6614/*
6615 * This operation also signals the server that this client is
6616 * performing "lease moved" recovery. The server can stop asserting
6617 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6618 * this operation is identified in the SEQUENCE operation in this
6619 * compound.
6620 */
6621static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6622{
6623 struct nfs_server *server = NFS_SERVER(inode);
6624 struct rpc_clnt *clnt = server->client;
6625 struct nfs4_fsid_present_arg args = {
6626 .fh = NFS_FH(inode),
6627 };
6628 struct nfs4_fsid_present_res res = {
6629 };
6630 struct rpc_message msg = {
6631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6632 .rpc_argp = &args,
6633 .rpc_resp = &res,
6634 .rpc_cred = cred,
6635 };
6636 int status;
6637
6638 res.fh = nfs_alloc_fhandle();
6639 if (res.fh == NULL)
6640 return -ENOMEM;
6641
6642 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6643 nfs4_set_sequence_privileged(&args.seq_args);
6644 status = nfs4_call_sync_sequence(clnt, server, &msg,
6645 &args.seq_args, &res.seq_res);
6646 nfs_free_fhandle(res.fh);
6647 if (status == NFS4_OK &&
6648 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6649 status = -NFS4ERR_LEASE_MOVED;
6650 return status;
6651}
6652
6653#endif /* CONFIG_NFS_V4_1 */
6654
6655/**
6656 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6657 * @inode: inode on FSID to check
6658 * @cred: credential to use for this operation
6659 *
6660 * Server indicates whether the FSID is present, moved, or not
6661 * recognized. This operation is necessary to clear a LEASE_MOVED
6662 * condition for this client ID.
6663 *
6664 * Returns NFS4_OK if the FSID is present on this server,
6665 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6666 * NFS4ERR code if some error occurred on the server, or a
6667 * negative errno if a local failure occurred.
6668 */
6669int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6670{
6671 struct nfs_server *server = NFS_SERVER(inode);
6672 struct nfs_client *clp = server->nfs_client;
6673 const struct nfs4_mig_recovery_ops *ops =
6674 clp->cl_mvops->mig_recovery_ops;
6675 struct nfs4_exception exception = { };
6676 int status;
6677
6678 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6679 (unsigned long long)server->fsid.major,
6680 (unsigned long long)server->fsid.minor,
6681 clp->cl_hostname);
6682 nfs_display_fhandle(NFS_FH(inode), __func__);
6683
6684 do {
6685 status = ops->fsid_present(inode, cred);
6686 if (status != -NFS4ERR_DELAY)
6687 break;
6688 nfs4_handle_exception(server, status, &exception);
6689 } while (exception.retry);
6690 return status;
6691}
6692
5ec16a85 6693/**
a5250def
WAA		 6694 * If 'use_integrity' is true and the state managment nfs_client
6695 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6696 * and the machine credential as per RFC3530bis and RFC5661 Security
6697 * Considerations sections. Otherwise, just use the user cred with the
6698 * filesystem's rpc_client.
5ec16a85 6699 */
a5250def 6700static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6701{
6702 int status;
6703 struct nfs4_secinfo_arg args = {
6704 .dir_fh = NFS_FH(dir),
6705 .name = name,
6706 };
6707 struct nfs4_secinfo_res res = {
6708 .flavors = flavors,
6709 };
6710 struct rpc_message msg = {
6711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6712 .rpc_argp = &args,
6713 .rpc_resp = &res,
6714 };
a5250def 6715 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6716 struct rpc_cred *cred = NULL;
a5250def
WAA		 6717
6718 if (use_integrity) {
6719 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6720 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6721 msg.rpc_cred = cred;
a5250def 6722 }
5a5ea0d4
BS		 6723
6724 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6725
6726 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6727 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6728
a5250def
WAA		 6729 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6730 &res.seq_res, 0);
5a5ea0d4 6731 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6732
7cb852df
WAA		 6733 if (cred)
6734 put_rpccred(cred);
a5250def 6735
5a5ea0d4
BS		 6736 return status;
6737}
6738
72de53ec
BS		 6739int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6740 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6741{
6742 struct nfs4_exception exception = { };
6743 int err;
6744 do {
a5250def
WAA		 6745 err = -NFS4ERR_WRONGSEC;
6746
6747 /* try to use integrity protection with machine cred */
6748 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6749 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6750
6751 /*
6752 * if unable to use integrity protection, or SECINFO with
6753 * integrity protection returns NFS4ERR_WRONGSEC (which is
6754 * disallowed by spec, but exists in deployed servers) use
6755 * the current filesystem's rpc_client and the user cred.
6756 */
6757 if (err == -NFS4ERR_WRONGSEC)
6758 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6759
078ea3df
TM		 6760 trace_nfs4_secinfo(dir, name, err);
6761 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6762 &exception);
6763 } while (exception.retry);
6764 return err;
6765}
6766
557134a3 6767#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6768/*
6769 * Check the exchange flags returned by the server for invalid flags, having
6770 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6771 * DS flags set.
6772 */
6773static int nfs4_check_cl_exchange_flags(u32 flags)
6774{
6775 if (flags & ~EXCHGID4_FLAG_MASK_R)
6776 goto out_inval;
6777 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6778 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6779 goto out_inval;
6780 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6781 goto out_inval;
6782 return NFS_OK;
6783out_inval:
6784 return -NFS4ERR_INVAL;
6785}
6786
78fe0f41 6787static bool
79d4e1f0
CL		 6788nfs41_same_server_scope(struct nfs41_server_scope *a,
6789 struct nfs41_server_scope *b)
78fe0f41
WAA		 6790{
6791 if (a->server_scope_sz == b->server_scope_sz &&
6792 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6793 return true;
6794
6795 return false;
6796}
6797
7c44f1ae
WAA		 6798/*
6799 * nfs4_proc_bind_conn_to_session()
6800 *
6801 * The 4.1 client currently uses the same TCP connection for the
6802 * fore and backchannel.
6803 */
2cf047c9 6804int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6805{
6806 int status;
71a097c6
TM		 6807 struct nfs41_bind_conn_to_session_args args = {
6808 .client = clp,
6809 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6810 };
7c44f1ae
WAA		 6811 struct nfs41_bind_conn_to_session_res res;
6812 struct rpc_message msg = {
6813 .rpc_proc =
6814 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6815 .rpc_argp = &args,
7c44f1ae 6816 .rpc_resp = &res,
2cf047c9 6817 .rpc_cred = cred,
7c44f1ae
WAA		 6818 };
6819
6820 dprintk("--> %s\n", __func__);
7c44f1ae 6821
71a097c6
TM		 6822 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6823 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6824 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6825
6826 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6827 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6828 if (status == 0) {
71a097c6 6829 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6830 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6831 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6832 status = -EIO;
71a097c6 6833 goto out;
7c44f1ae 6834 }
71a097c6 6835 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6836 dprintk("NFS: %s: Unexpected direction from server\n",
6837 __func__);
6838 status = -EIO;
71a097c6 6839 goto out;
7c44f1ae 6840 }
71a097c6 6841 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6842 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6843 __func__);
6844 status = -EIO;
71a097c6 6845 goto out;
7c44f1ae
WAA		 6846 }
6847 }
7c44f1ae
WAA		 6848out:
6849 dprintk("<-- %s status= %d\n", __func__, status);
6850 return status;
6851}
6852
99fe60d0 6853/*
fa940720
WAA		 6854 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6855 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6856 */
6857static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6858 .how = SP4_MACH_CRED,
6859 .enforce.u.words = {
6860 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6861 1 << (OP_EXCHANGE_ID - 32) |
6862 1 << (OP_CREATE_SESSION - 32) |
6863 1 << (OP_DESTROY_SESSION - 32) |
6864 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6865 },
6866 .allow.u.words = {
6867 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6868 1 << (OP_LOCKU) |
6869 1 << (OP_COMMIT),
8b5bee2e 6870 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6871 1 << (OP_SECINFO_NO_NAME - 32) |
6872 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6873 1 << (OP_FREE_STATEID - 32) |
6874 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6875 }
6876};
6877
6878/*
6879 * Select the state protection mode for client `clp' given the server results
6880 * from exchange_id in `sp'.
99fe60d0 6881 *
2031cd1a
WAA		 6882 * Returns 0 on success, negative errno otherwise.
6883 */
6884static int nfs4_sp4_select_mode(struct nfs_client *clp,
6885 struct nfs41_state_protection *sp)
6886{
6887 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6888 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6889 1 << (OP_EXCHANGE_ID - 32) |
6890 1 << (OP_CREATE_SESSION - 32) |
6891 1 << (OP_DESTROY_SESSION - 32) |
6892 1 << (OP_DESTROY_CLIENTID - 32)
6893 };
6894 unsigned int i;
6895
6896 if (sp->how == SP4_MACH_CRED) {
6897 /* Print state protect result */
6898 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6899 for (i = 0; i <= LAST_NFS4_OP; i++) {
6900 if (test_bit(i, sp->enforce.u.longs))
6901 dfprintk(MOUNT, " enforce op %d\n", i);
6902 if (test_bit(i, sp->allow.u.longs))
6903 dfprintk(MOUNT, " allow op %d\n", i);
6904 }
6905
6906 /* make sure nothing is on enforce list that isn't supported */
6907 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6908 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6909 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6910 return -EINVAL;
6911 }
6912 }
6913
6914 /*
6915 * Minimal mode - state operations are allowed to use machine
6916 * credential. Note this already happens by default, so the
6917 * client doesn't have to do anything more than the negotiation.
6918 *
6919 * NOTE: we don't care if EXCHANGE_ID is in the list -
6920 * we're already using the machine cred for exchange_id
6921 * and will never use a different cred.
6922 */
6923 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6924 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6925 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6926 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6927 dfprintk(MOUNT, "sp4_mach_cred:\n");
6928 dfprintk(MOUNT, " minimal mode enabled\n");
6929 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6930 } else {
6931 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6932 return -EINVAL;
6933 }
fa940720
WAA		 6934
6935 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6936 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6937 dfprintk(MOUNT, " cleanup mode enabled\n");
6938 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6939 }
8b5bee2e
WAA		 6940
6941 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6942 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6943 dfprintk(MOUNT, " secinfo mode enabled\n");
6944 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6945 }
3787d506
WAA		 6946
6947 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6948 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6949 dfprintk(MOUNT, " stateid mode enabled\n");
6950 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6951 }
8c21c62c
WAA		 6952
6953 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6954 dfprintk(MOUNT, " write mode enabled\n");
6955 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6956 }
6957
6958 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6959 dfprintk(MOUNT, " commit mode enabled\n");
6960 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6961 }
2031cd1a
WAA		 6962 }
6963
6964 return 0;
6965}
6966
6967/*
6968 * _nfs4_proc_exchange_id()
6bbb4ae8 6969 *
2031cd1a 6970 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6971 */
2031cd1a
WAA		 6972static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6973 u32 sp4_how)
99fe60d0
BH		 6974{
6975 nfs4_verifier verifier;
6976 struct nfs41_exchange_id_args args = {
cd93710e 6977 .verifier = &verifier,
99fe60d0 6978 .client = clp,
cd3fadec 6979#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6980 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6981 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6982 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6983#else
6984 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6985 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6986#endif
99fe60d0
BH		 6987 };
6988 struct nfs41_exchange_id_res res = {
32b01310 6989 0
99fe60d0
BH		 6990 };
6991 int status;
6992 struct rpc_message msg = {
6993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6994 .rpc_argp = &args,
6995 .rpc_resp = &res,
6996 .rpc_cred = cred,
6997 };
99fe60d0 6998
f092075d 6999 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7000
7001 status = nfs4_init_uniform_client_string(clp);
7002 if (status)
3a6bb738 7003 goto out;
3a6bb738
JL		 7004
7005 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7006 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7007 clp->cl_owner_id);
99fe60d0 7008
acdeb69d 7009 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7010 GFP_NOFS);
acdeb69d 7011 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7012 status = -ENOMEM;
7013 goto out;
7014 }
78fe0f41 7015
79d4e1f0 7016 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7017 GFP_NOFS);
177313f1 7018 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7019 status = -ENOMEM;
acdeb69d 7020 goto out_server_owner;
abe9a6d5 7021 }
78fe0f41 7022
bbafffd2 7023 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7024 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7025 status = -ENOMEM;
7026 goto out_server_scope;
7027 }
7028
2031cd1a
WAA		 7029 switch (sp4_how) {
7030 case SP4_NONE:
7031 args.state_protect.how = SP4_NONE;
7032 break;
7033
7034 case SP4_MACH_CRED:
7035 args.state_protect = nfs4_sp4_mach_cred_request;
7036 break;
7037
7038 default:
7039 /* unsupported! */
7040 WARN_ON_ONCE(1);
7041 status = -EINVAL;
6b55970b 7042 goto out_impl_id;
2031cd1a
WAA		 7043 }
7044
1bd714f2 7045 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7046 trace_nfs4_exchange_id(clp, status);
177313f1 7047 if (status == 0)
32b01310 7048 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7049
2031cd1a
WAA		 7050 if (status == 0)
7051 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7052
acdeb69d 7053 if (status == 0) {
32b01310 7054 clp->cl_clientid = res.clientid;
e11259f9
TM		 7055 clp->cl_exchange_flags = res.flags;
7056 /* Client ID is not confirmed */
7057 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7058 clear_bit(NFS4_SESSION_ESTABLISHED,
7059 &clp->cl_session->session_state);
32b01310 7060 clp->cl_seqid = res.seqid;
e11259f9 7061 }
32b01310 7062
acdeb69d
CL		 7063 kfree(clp->cl_serverowner);
7064 clp->cl_serverowner = res.server_owner;
7065 res.server_owner = NULL;
78fe0f41 7066
7d2ed9ac 7067 /* use the most recent implementation id */
59155546
CL		 7068 kfree(clp->cl_implid);
7069 clp->cl_implid = res.impl_id;
6b55970b 7070 res.impl_id = NULL;
7d2ed9ac 7071
177313f1 7072 if (clp->cl_serverscope != NULL &&
79d4e1f0 7073 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7074 res.server_scope)) {
7075 dprintk("%s: server_scope mismatch detected\n",
7076 __func__);
7077 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7078 kfree(clp->cl_serverscope);
7079 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7080 }
7081
177313f1 7082 if (clp->cl_serverscope == NULL) {
79d4e1f0 7083 clp->cl_serverscope = res.server_scope;
6b55970b 7084 res.server_scope = NULL;
abe9a6d5 7085 }
6b55970b 7086 }
7d2ed9ac 7087
6b55970b
KM		 7088out_impl_id:
7089 kfree(res.impl_id);
7d2ed9ac 7090out_server_scope:
abe9a6d5 7091 kfree(res.server_scope);
6b55970b
KM		 7092out_server_owner:
7093 kfree(res.server_owner);
abe9a6d5 7094out:
177313f1 7095 if (clp->cl_implid != NULL)
6bbb4ae8 7096 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7097 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7098 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7099 clp->cl_implid->date.seconds,
7100 clp->cl_implid->date.nseconds);
6bbb4ae8 7101 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7102 return status;
7103}
7104
2031cd1a
WAA		 7105/*
7106 * nfs4_proc_exchange_id()
7107 *
7108 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7109 *
7110 * Since the clientid has expired, all compounds using sessions
7111 * associated with the stale clientid will be returning
7112 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7113 * be in some phase of session reset.
7114 *
7115 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7116 */
7117int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7118{
7119 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7120 int status;
7121
7122 /* try SP4_MACH_CRED if krb5i/p */
7123 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7124 authflavor == RPC_AUTH_GSS_KRB5P) {
7125 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7126 if (!status)
7127 return 0;
7128 }
7129
7130 /* try SP4_NONE */
7131 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7132}
7133
66245539
TM		 7134static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7135 struct rpc_cred *cred)
7136{
7137 struct rpc_message msg = {
7138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7139 .rpc_argp = clp,
7140 .rpc_cred = cred,
7141 };
7142 int status;
7143
7144 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7145 trace_nfs4_destroy_clientid(clp, status);
66245539 7146 if (status)
02c67525 7147 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7148 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7149 return status;
7150}
7151
7152static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7153 struct rpc_cred *cred)
7154{
7155 unsigned int loop;
7156 int ret;
7157
7158 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7159 ret = _nfs4_proc_destroy_clientid(clp, cred);
7160 switch (ret) {
7161 case -NFS4ERR_DELAY:
7162 case -NFS4ERR_CLIENTID_BUSY:
7163 ssleep(1);
7164 break;
7165 default:
7166 return ret;
7167 }
7168 }
7169 return 0;
7170}
7171
7172int nfs4_destroy_clientid(struct nfs_client *clp)
7173{
7174 struct rpc_cred *cred;
7175 int ret = 0;
7176
7177 if (clp->cl_mvops->minor_version < 1)
7178 goto out;
7179 if (clp->cl_exchange_flags == 0)
7180 goto out;
05f4c350
CL		 7181 if (clp->cl_preserve_clid)
7182 goto out;
73d8bde5 7183 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7184 ret = nfs4_proc_destroy_clientid(clp, cred);
7185 if (cred)
7186 put_rpccred(cred);
7187 switch (ret) {
7188 case 0:
7189 case -NFS4ERR_STALE_CLIENTID:
7190 clp->cl_exchange_flags = 0;
7191 }
7192out:
7193 return ret;
7194}
7195
2050f0cc
AA		 7196struct nfs4_get_lease_time_data {
7197 struct nfs4_get_lease_time_args *args;
7198 struct nfs4_get_lease_time_res *res;
7199 struct nfs_client *clp;
7200};
7201
7202static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7203 void *calldata)
7204{
2050f0cc
AA		 7205 struct nfs4_get_lease_time_data *data =
7206 (struct nfs4_get_lease_time_data *)calldata;
7207
7208 dprintk("--> %s\n", __func__);
7209 /* just setup sequence, do not trigger session recovery
7210 since we're invoked within one */
d9afbd1b
TM		 7211 nfs41_setup_sequence(data->clp->cl_session,
7212 &data->args->la_seq_args,
7213 &data->res->lr_seq_res,
7214 task);
2050f0cc
AA		 7215 dprintk("<-- %s\n", __func__);
7216}
7217
7218/*
7219 * Called from nfs4_state_manager thread for session setup, so don't recover
7220 * from sequence operation or clientid errors.
7221 */
7222static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7223{
7224 struct nfs4_get_lease_time_data *data =
7225 (struct nfs4_get_lease_time_data *)calldata;
7226
7227 dprintk("--> %s\n", __func__);
14516c3a
TM		 7228 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7229 return;
2050f0cc
AA		 7230 switch (task->tk_status) {
7231 case -NFS4ERR_DELAY:
7232 case -NFS4ERR_GRACE:
7233 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7234 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7235 task->tk_status = 0;
a8a4ae3a
AA		 7236 /* fall through */
7237 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7238 rpc_restart_call_prepare(task);
2050f0cc
AA		 7239 return;
7240 }
2050f0cc
AA		 7241 dprintk("<-- %s\n", __func__);
7242}
7243
17280175 7244static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7245 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7246 .rpc_call_done = nfs4_get_lease_time_done,
7247};
7248
7249int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7250{
7251 struct rpc_task *task;
7252 struct nfs4_get_lease_time_args args;
7253 struct nfs4_get_lease_time_res res = {
7254 .lr_fsinfo = fsinfo,
7255 };
7256 struct nfs4_get_lease_time_data data = {
7257 .args = &args,
7258 .res = &res,
7259 .clp = clp,
7260 };
7261 struct rpc_message msg = {
7262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7263 .rpc_argp = &args,
7264 .rpc_resp = &res,
7265 };
7266 struct rpc_task_setup task_setup = {
7267 .rpc_client = clp->cl_rpcclient,
7268 .rpc_message = &msg,
7269 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7270 .callback_data = &data,
7271 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7272 };
7273 int status;
7274
a9c92d6b 7275 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7276 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7277 dprintk("--> %s\n", __func__);
7278 task = rpc_run_task(&task_setup);
7279
7280 if (IS_ERR(task))
7281 status = PTR_ERR(task);
7282 else {
7283 status = task->tk_status;
7284 rpc_put_task(task);
7285 }
7286 dprintk("<-- %s return %d\n", __func__, status);
7287
7288 return status;
7289}
7290
fc931582
AA		 7291/*
7292 * Initialize the values to be used by the client in CREATE_SESSION
7293 * If nfs4_init_session set the fore channel request and response sizes,
7294 * use them.
7295 *
7296 * Set the back channel max_resp_sz_cached to zero to force the client to
7297 * always set csa_cachethis to FALSE because the current implementation
7298 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7299 */
7300static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7301{
18aad3d5
AA		 7302 unsigned int max_rqst_sz, max_resp_sz;
7303
7304 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7305 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7306
fc931582 7307 /* Fore channel attributes */
18aad3d5
AA		 7308 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7309 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7310 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7311 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7312
7313 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7314 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7315 __func__,
7316 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7317 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7318
7319 /* Back channel attributes */
fc931582
AA		 7320 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7321 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7322 args->bc_attrs.max_resp_sz_cached = 0;
7323 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7324 args->bc_attrs.max_reqs = 1;
7325
7326 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7327 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7328 __func__,
7329 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7330 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7331 args->bc_attrs.max_reqs);
7332}
7333
79969dd1
TM		 7334static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7335 struct nfs41_create_session_res *res)
8d35301d 7336{
43c2e885 7337 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7338 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7339
43c2e885
BF		 7340 if (rcvd->max_resp_sz > sent->max_resp_sz)
7341 return -EINVAL;
7342 /*
7343 * Our requested max_ops is the minimum we need; we're not
7344 * prepared to break up compounds into smaller pieces than that.
7345 * So, no point even trying to continue if the server won't
7346 * cooperate:
7347 */
7348 if (rcvd->max_ops < sent->max_ops)
7349 return -EINVAL;
7350 if (rcvd->max_reqs == 0)
7351 return -EINVAL;
b4b9a0c1
VG		 7352 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7353 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7354 return 0;
8d35301d
AA		 7355}
7356
79969dd1
TM		 7357static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7358 struct nfs41_create_session_res *res)
43c2e885
BF		 7359{
7360 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7361 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7362
b1c0df5f
TM		 7363 if (!(res->flags & SESSION4_BACK_CHAN))
7364 goto out;
43c2e885
BF		 7365 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7366 return -EINVAL;
7367 if (rcvd->max_resp_sz < sent->max_resp_sz)
7368 return -EINVAL;
7369 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7370 return -EINVAL;
7371 /* These would render the backchannel useless: */
b4b9a0c1 7372 if (rcvd->max_ops != sent->max_ops)
43c2e885 7373 return -EINVAL;
b4b9a0c1 7374 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7375 return -EINVAL;
b1c0df5f 7376out:
43c2e885
BF		 7377 return 0;
7378}
8d35301d 7379
8d35301d 7380static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7381 struct nfs41_create_session_res *res)
8d35301d 7382{
43c2e885 7383 int ret;
8d35301d 7384
79969dd1 7385 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7386 if (ret)
7387 return ret;
79969dd1
TM		 7388 return nfs4_verify_back_channel_attrs(args, res);
7389}
7390
7391static void nfs4_update_session(struct nfs4_session *session,
7392 struct nfs41_create_session_res *res)
7393{
7394 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7395 /* Mark client id and session as being confirmed */
7396 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7397 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7398 session->flags = res->flags;
7399 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7400 if (res->flags & SESSION4_BACK_CHAN)
7401 memcpy(&session->bc_attrs, &res->bc_attrs,
7402 sizeof(session->bc_attrs));
8d35301d
AA		 7403}
7404
848f5bda
TM		 7405static int _nfs4_proc_create_session(struct nfs_client *clp,
7406 struct rpc_cred *cred)
fc931582
AA		 7407{
7408 struct nfs4_session *session = clp->cl_session;
7409 struct nfs41_create_session_args args = {
7410 .client = clp,
79969dd1
TM		 7411 .clientid = clp->cl_clientid,
7412 .seqid = clp->cl_seqid,
fc931582
AA		 7413 .cb_program = NFS4_CALLBACK,
7414 };
79969dd1
TM		 7415 struct nfs41_create_session_res res;
7416
fc931582
AA		 7417 struct rpc_message msg = {
7418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7419 .rpc_argp = &args,
7420 .rpc_resp = &res,
848f5bda 7421 .rpc_cred = cred,
fc931582
AA		 7422 };
7423 int status;
7424
7425 nfs4_init_channel_attrs(&args);
0f91421e 7426 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7427
1bd714f2 7428 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7429 trace_nfs4_create_session(clp, status);
fc931582 7430
43095d39 7431 if (!status) {
8d35301d 7432 /* Verify the session's negotiated channel_attrs values */
79969dd1 7433 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7434 /* Increment the clientid slot sequence id */
79969dd1
TM		 7435 if (clp->cl_seqid == res.seqid)
7436 clp->cl_seqid++;
7437 if (status)
7438 goto out;
7439 nfs4_update_session(session, &res);
fc931582 7440 }
79969dd1 7441out:
fc931582
AA		 7442 return status;
7443}
7444
7445/*
7446 * Issues a CREATE_SESSION operation to the server.
7447 * It is the responsibility of the caller to verify the session is
7448 * expired before calling this routine.
7449 */
848f5bda 7450int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7451{
7452 int status;
7453 unsigned *ptr;
fc931582
AA		 7454 struct nfs4_session *session = clp->cl_session;
7455
7456 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7457
848f5bda 7458 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7459 if (status)
7460 goto out;
7461
aacd5537
AA		 7462 /* Init or reset the session slot tables */
7463 status = nfs4_setup_session_slot_tables(session);
7464 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7465 if (status)
7466 goto out;
7467
7468 ptr = (unsigned *)&session->sess_id.data[0];
7469 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7470 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7471out:
7472 dprintk("<-- %s\n", __func__);
7473 return status;
7474}
7475
0f3e66c6
AA		 7476/*
7477 * Issue the over-the-wire RPC DESTROY_SESSION.
7478 * The caller must serialize access to this routine.
7479 */
848f5bda
TM		 7480int nfs4_proc_destroy_session(struct nfs4_session *session,
7481 struct rpc_cred *cred)
0f3e66c6 7482{
848f5bda
TM		 7483 struct rpc_message msg = {
7484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7485 .rpc_argp = session,
7486 .rpc_cred = cred,
7487 };
0f3e66c6 7488 int status = 0;
0f3e66c6
AA		 7489
7490 dprintk("--> nfs4_proc_destroy_session\n");
7491
7492 /* session is still being setup */
e11259f9
TM		 7493 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7494 return 0;
0f3e66c6 7495
1bd714f2 7496 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7497 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7498
7499 if (status)
08106ac7 7500 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7501 "Session has been destroyed regardless...\n", status);
7502
7503 dprintk("<-- nfs4_proc_destroy_session\n");
7504 return status;
7505}
7506
fc01cea9
AA		 7507/*
7508 * Renew the cl_session lease.
7509 */
d5f8d3fe
TM		 7510struct nfs4_sequence_data {
7511 struct nfs_client *clp;
7512 struct nfs4_sequence_args args;
7513 struct nfs4_sequence_res res;
7514};
7515
dc96aef9
AB		 7516static void nfs41_sequence_release(void *data)
7517{
d5f8d3fe
TM		 7518 struct nfs4_sequence_data *calldata = data;
7519 struct nfs_client *clp = calldata->clp;
dc96aef9 7520
7135840f
AB		 7521 if (atomic_read(&clp->cl_count) > 1)
7522 nfs4_schedule_state_renewal(clp);
7523 nfs_put_client(clp);
d5f8d3fe 7524 kfree(calldata);
dc96aef9
AB		 7525}
7526
aa5190d0
TM		 7527static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7528{
7529 switch(task->tk_status) {
7530 case -NFS4ERR_DELAY:
aa5190d0
TM		 7531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7532 return -EAGAIN;
7533 default:
0400a6b0 7534 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7535 }
7536 return 0;
7537}
7538
dc96aef9 7539static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7540{
d5f8d3fe
TM		 7541 struct nfs4_sequence_data *calldata = data;
7542 struct nfs_client *clp = calldata->clp;
fc01cea9 7543
14516c3a
TM		 7544 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7545 return;
fc01cea9 7546
c6d01c6f 7547 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7548 if (task->tk_status < 0) {
7549 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7550 if (atomic_read(&clp->cl_count) == 1)
7551 goto out;
fc01cea9 7552
aa5190d0
TM		 7553 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7554 rpc_restart_call_prepare(task);
fc01cea9
AA		 7555 return;
7556 }
7557 }
fc01cea9 7558 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7559out:
fc01cea9
AA		 7560 dprintk("<-- %s\n", __func__);
7561}
7562
7563static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7564{
d5f8d3fe
TM		 7565 struct nfs4_sequence_data *calldata = data;
7566 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7567 struct nfs4_sequence_args *args;
7568 struct nfs4_sequence_res *res;
7569
fc01cea9
AA		 7570 args = task->tk_msg.rpc_argp;
7571 res = task->tk_msg.rpc_resp;
7572
d9afbd1b 7573 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7574}
7575
7576static const struct rpc_call_ops nfs41_sequence_ops = {
7577 .rpc_call_done = nfs41_sequence_call_done,
7578 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7579 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7580};
7581
8fe72bac
TM		 7582static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7583 struct rpc_cred *cred,
7584 bool is_privileged)
fc01cea9 7585{
d5f8d3fe 7586 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7587 struct rpc_message msg = {
7588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7589 .rpc_cred = cred,
7590 };
71ac6da9
TM		 7591 struct rpc_task_setup task_setup_data = {
7592 .rpc_client = clp->cl_rpcclient,
7593 .rpc_message = &msg,
8fe72bac 7594 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7595 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7596 };
fc01cea9 7597
7135840f 7598 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7599 return ERR_PTR(-EIO);
dfb4f309 7600 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7601 if (calldata == NULL) {
7135840f 7602 nfs_put_client(clp);
71ac6da9 7603 return ERR_PTR(-ENOMEM);
fc01cea9 7604 }
a9c92d6b 7605 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7606 if (is_privileged)
7607 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7608 msg.rpc_argp = &calldata->args;
7609 msg.rpc_resp = &calldata->res;
7610 calldata->clp = clp;
71ac6da9 7611 task_setup_data.callback_data = calldata;
fc01cea9 7612
71ac6da9
TM		 7613 return rpc_run_task(&task_setup_data);
7614}
7615
2f60ea6b 7616static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7617{
7618 struct rpc_task *task;
7619 int ret = 0;
7620
2f60ea6b 7621 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7622 return -EAGAIN;
8fe72bac 7623 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7624 if (IS_ERR(task))
7625 ret = PTR_ERR(task);
7626 else
bf294b41 7627 rpc_put_task_async(task);
71ac6da9
TM		 7628 dprintk("<-- %s status=%d\n", __func__, ret);
7629 return ret;
7630}
7631
7632static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7633{
7634 struct rpc_task *task;
7635 int ret;
7636
8fe72bac 7637 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7638 if (IS_ERR(task)) {
7639 ret = PTR_ERR(task);
7640 goto out;
7641 }
7642 ret = rpc_wait_for_completion_task(task);
be824167 7643 if (!ret)
71ac6da9
TM		 7644 ret = task->tk_status;
7645 rpc_put_task(task);
7646out:
7647 dprintk("<-- %s status=%d\n", __func__, ret);
7648 return ret;
fc01cea9
AA		 7649}
7650
fce5c838
RL		 7651struct nfs4_reclaim_complete_data {
7652 struct nfs_client *clp;
7653 struct nfs41_reclaim_complete_args arg;
7654 struct nfs41_reclaim_complete_res res;
7655};
7656
7657static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7658{
7659 struct nfs4_reclaim_complete_data *calldata = data;
7660
d9afbd1b
TM		 7661 nfs41_setup_sequence(calldata->clp->cl_session,
7662 &calldata->arg.seq_args,
7663 &calldata->res.seq_res,
7664 task);
fce5c838
RL		 7665}
7666
aa5190d0
TM		 7667static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7668{
7669 switch(task->tk_status) {
7670 case 0:
7671 case -NFS4ERR_COMPLETE_ALREADY:
7672 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7673 break;
7674 case -NFS4ERR_DELAY:
aa5190d0 7675 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7676 /* fall through */
7677 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7678 return -EAGAIN;
7679 default:
0400a6b0 7680 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7681 }
7682 return 0;
7683}
7684
fce5c838
RL		 7685static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7686{
7687 struct nfs4_reclaim_complete_data *calldata = data;
7688 struct nfs_client *clp = calldata->clp;
7689 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7690
7691 dprintk("--> %s\n", __func__);
14516c3a
TM		 7692 if (!nfs41_sequence_done(task, res))
7693 return;
fce5c838 7694
c6d01c6f 7695 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7696 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7697 rpc_restart_call_prepare(task);
7698 return;
7699 }
fce5c838
RL		 7700 dprintk("<-- %s\n", __func__);
7701}
7702
7703static void nfs4_free_reclaim_complete_data(void *data)
7704{
7705 struct nfs4_reclaim_complete_data *calldata = data;
7706
7707 kfree(calldata);
7708}
7709
7710static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7711 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7712 .rpc_call_done = nfs4_reclaim_complete_done,
7713 .rpc_release = nfs4_free_reclaim_complete_data,
7714};
7715
7716/*
7717 * Issue a global reclaim complete.
7718 */
965e9c23
TM		 7719static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7720 struct rpc_cred *cred)
fce5c838
RL		 7721{
7722 struct nfs4_reclaim_complete_data *calldata;
7723 struct rpc_task *task;
7724 struct rpc_message msg = {
7725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7726 .rpc_cred = cred,
fce5c838
RL		 7727 };
7728 struct rpc_task_setup task_setup_data = {
7729 .rpc_client = clp->cl_rpcclient,
7730 .rpc_message = &msg,
7731 .callback_ops = &nfs4_reclaim_complete_call_ops,
7732 .flags = RPC_TASK_ASYNC,
7733 };
7734 int status = -ENOMEM;
7735
7736 dprintk("--> %s\n", __func__);
8535b2be 7737 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7738 if (calldata == NULL)
7739 goto out;
7740 calldata->clp = clp;
7741 calldata->arg.one_fs = 0;
fce5c838 7742
a9c92d6b 7743 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7744 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7745 msg.rpc_argp = &calldata->arg;
7746 msg.rpc_resp = &calldata->res;
7747 task_setup_data.callback_data = calldata;
7748 task = rpc_run_task(&task_setup_data);
acf82b85 7749 if (IS_ERR(task)) {
fce5c838 7750 status = PTR_ERR(task);
acf82b85
DC		 7751 goto out;
7752 }
c34c32ea
AA		 7753 status = nfs4_wait_for_completion_rpc_task(task);
7754 if (status == 0)
7755 status = task->tk_status;
fce5c838 7756 rpc_put_task(task);
acf82b85 7757 return 0;
fce5c838
RL		 7758out:
7759 dprintk("<-- %s status=%d\n", __func__, status);
7760 return status;
7761}
b1f69b75
AA		 7762
7763static void
7764nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7765{
7766 struct nfs4_layoutget *lgp = calldata;
c31663d4 7767 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7768 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7769
7770 dprintk("--> %s\n", __func__);
c31663d4
FI		 7771 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7772 * right now covering the LAYOUTGET we are about to send.
7773 * However, that is not so catastrophic, and there seems
7774 * to be no way to prevent it completely.
7775 */
6ba7db34 7776 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7777 &lgp->res.seq_res, task))
b1f69b75 7778 return;
cf7d63f1
FI		 7779 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7780 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7781 &lgp->args.range,
cf7d63f1
FI		 7782 lgp->args.ctx->state)) {
7783 rpc_exit(task, NFS4_OK);
cf7d63f1 7784 }
b1f69b75
AA		 7785}
7786
7787static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7788{
7789 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7790 struct inode *inode = lgp->args.inode;
7791 struct nfs_server *server = NFS_SERVER(inode);
7792 struct pnfs_layout_hdr *lo;
7793 struct nfs4_state *state = NULL;
ed7e5423 7794 unsigned long timeo, now, giveup;
b1f69b75 7795
ed7e5423 7796 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7797
6ba7db34 7798 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7799 goto out;
b1f69b75
AA		 7800
7801 switch (task->tk_status) {
7802 case 0:
ee314c2a 7803 goto out;
21b874c8
TM		 7804 /*
7805 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7806 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7807 */
7808 case -NFS4ERR_BADLAYOUT:
7809 goto out_overflow;
ed7e5423
BH		 7810 /*
7811 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7812 * (or clients) writing to the same RAID stripe except when
7813 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7814 */
b1f69b75 7815 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7816 if (lgp->args.minlength == 0)
7817 goto out_overflow;
ed7e5423
BH		 7818 /*
7819 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7820 * existing layout before getting a new one).
7821 */
b1f69b75 7822 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7823 timeo = rpc_get_timeout(task->tk_client);
7824 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7825 now = jiffies;
7826 if (time_after(giveup, now)) {
7827 unsigned long delay;
7828
7829 /* Delay for:
7830 * - Not less then NFS4_POLL_RETRY_MIN.
7831 * - One last time a jiffie before we give up
7832 * - exponential backoff (time_now minus start_attempt)
7833 */
7834 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7835 min((giveup - now - 1),
7836 now - lgp->args.timestamp));
7837
7838 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7839 __func__, delay);
7840 rpc_delay(task, delay);
2259f960
TM		 7841 /* Do not call nfs4_async_handle_error() */
7842 goto out_restart;
ed7e5423 7843 }
ee314c2a
TM		 7844 break;
7845 case -NFS4ERR_EXPIRED:
7846 case -NFS4ERR_BAD_STATEID:
7847 spin_lock(&inode->i_lock);
2259f960
TM		 7848 if (nfs4_stateid_match(&lgp->args.stateid,
7849 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7850 spin_unlock(&inode->i_lock);
7851 /* If the open stateid was bad, then recover it. */
7852 state = lgp->args.ctx->state;
2259f960
TM		 7853 break;
7854 }
7855 lo = NFS_I(inode)->layout;
7856 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7857 &lo->plh_stateid)) {
ee314c2a
TM		 7858 LIST_HEAD(head);
7859
defb8460
CH		 7860 /*
7861 * Mark the bad layout state as invalid, then retry
7862 * with the current stateid.
7863 */
8714d46d 7864 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7865 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7866 spin_unlock(&inode->i_lock);
ee314c2a 7867 pnfs_free_lseg_list(&head);
2259f960
TM		 7868 } else
7869 spin_unlock(&inode->i_lock);
7870 goto out_restart;
b1f69b75 7871 }
8478eaa1 7872 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
2259f960 7873 goto out_restart;
ee314c2a 7874out:
b1f69b75 7875 dprintk("<-- %s\n", __func__);
21b874c8 7876 return;
2259f960
TM		 7877out_restart:
7878 task->tk_status = 0;
7879 rpc_restart_call_prepare(task);
7880 return;
21b874c8
TM		 7881out_overflow:
7882 task->tk_status = -EOVERFLOW;
7883 goto out;
b1f69b75
AA		 7884}
7885
8554116e
IK		 7886static size_t max_response_pages(struct nfs_server *server)
7887{
7888 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7889 return nfs_page_array_len(0, max_resp_sz);
7890}
7891
7892static void nfs4_free_pages(struct page **pages, size_t size)
7893{
7894 int i;
7895
7896 if (!pages)
7897 return;
7898
7899 for (i = 0; i < size; i++) {
7900 if (!pages[i])
7901 break;
7902 __free_page(pages[i]);
7903 }
7904 kfree(pages);
7905}
7906
7907static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7908{
7909 struct page **pages;
7910 int i;
7911
7912 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7913 if (!pages) {
7914 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7915 return NULL;
7916 }
7917
7918 for (i = 0; i < size; i++) {
7919 pages[i] = alloc_page(gfp_flags);
7920 if (!pages[i]) {
7921 dprintk("%s: failed to allocate page\n", __func__);
7922 nfs4_free_pages(pages, size);
7923 return NULL;
7924 }
7925 }
7926
7927 return pages;
7928}
7929
b1f69b75
AA		 7930static void nfs4_layoutget_release(void *calldata)
7931{
7932 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7933 struct inode *inode = lgp->args.inode;
7934 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7935 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7936
7937 dprintk("--> %s\n", __func__);
8554116e 7938 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7939 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7940 put_nfs_open_context(lgp->args.ctx);
7941 kfree(calldata);
7942 dprintk("<-- %s\n", __func__);
7943}
7944
7945static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7946 .rpc_call_prepare = nfs4_layoutget_prepare,
7947 .rpc_call_done = nfs4_layoutget_done,
7948 .rpc_release = nfs4_layoutget_release,
7949};
7950
a0b0a6e3
TM		 7951struct pnfs_layout_segment *
7952nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7953{
a47970ff
WAA		 7954 struct inode *inode = lgp->args.inode;
7955 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7956 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7957 struct rpc_task *task;
7958 struct rpc_message msg = {
7959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7960 .rpc_argp = &lgp->args,
7961 .rpc_resp = &lgp->res,
6ab59344 7962 .rpc_cred = lgp->cred,
b1f69b75
AA		 7963 };
7964 struct rpc_task_setup task_setup_data = {
7965 .rpc_client = server->client,
7966 .rpc_message = &msg,
7967 .callback_ops = &nfs4_layoutget_call_ops,
7968 .callback_data = lgp,
7969 .flags = RPC_TASK_ASYNC,
7970 };
a0b0a6e3 7971 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7972 int status = 0;
7973
7974 dprintk("--> %s\n", __func__);
7975
4bd5a980
PT		 7976 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7977 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7978
8554116e
IK		 7979 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7980 if (!lgp->args.layout.pages) {
7981 nfs4_layoutget_release(lgp);
a0b0a6e3 7982 return ERR_PTR(-ENOMEM);
8554116e
IK		 7983 }
7984 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7985 lgp->args.timestamp = jiffies;
8554116e 7986
35124a09 7987 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7988 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7989 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7990
b1f69b75
AA		 7991 task = rpc_run_task(&task_setup_data);
7992 if (IS_ERR(task))
a0b0a6e3 7993 return ERR_CAST(task);
b1f69b75 7994 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7995 if (status == 0)
7996 status = task->tk_status;
1037e6ea
TM		 7997 trace_nfs4_layoutget(lgp->args.ctx,
7998 &lgp->args.range,
7999 &lgp->res.range,
8000 status);
085b7a45
WAA		 8001 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8002 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8003 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8004 rpc_put_task(task);
8005 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8006 if (status)
8007 return ERR_PTR(status);
8008 return lseg;
b1f69b75
AA		 8009}
8010
cbe82603
BH		 8011static void
8012nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8013{
8014 struct nfs4_layoutreturn *lrp = calldata;
8015
8016 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8017 nfs41_setup_sequence(lrp->clp->cl_session,
8018 &lrp->args.seq_args,
8019 &lrp->res.seq_res,
8020 task);
cbe82603
BH		 8021}
8022
8023static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8024{
8025 struct nfs4_layoutreturn *lrp = calldata;
8026 struct nfs_server *server;
8027
8028 dprintk("--> %s\n", __func__);
8029
6ba7db34 8030 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8031 return;
8032
8033 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8034 switch (task->tk_status) {
8035 default:
8036 task->tk_status = 0;
8037 case 0:
8038 break;
8039 case -NFS4ERR_DELAY:
8478eaa1 8040 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8041 break;
d00c5d43 8042 rpc_restart_call_prepare(task);
cbe82603
BH		 8043 return;
8044 }
cbe82603
BH		 8045 dprintk("<-- %s\n", __func__);
8046}
8047
8048static void nfs4_layoutreturn_release(void *calldata)
8049{
8050 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8051 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8052 LIST_HEAD(freeme);
cbe82603
BH		 8053
8054 dprintk("--> %s\n", __func__);
849b286f
TM		 8055 spin_lock(&lo->plh_inode->i_lock);
8056 if (lrp->res.lrs_present)
8057 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8058 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8059 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8060 lo->plh_block_lgets--;
8061 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8062 pnfs_free_lseg_list(&freeme);
70c3bd2b 8063 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8064 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8065 kfree(calldata);
8066 dprintk("<-- %s\n", __func__);
8067}
8068
8069static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8070 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8071 .rpc_call_done = nfs4_layoutreturn_done,
8072 .rpc_release = nfs4_layoutreturn_release,
8073};
8074
6c16605d 8075int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8076{
8077 struct rpc_task *task;
8078 struct rpc_message msg = {
8079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8080 .rpc_argp = &lrp->args,
8081 .rpc_resp = &lrp->res,
9556000d 8082 .rpc_cred = lrp->cred,
cbe82603
BH		 8083 };
8084 struct rpc_task_setup task_setup_data = {
1771c577 8085 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8086 .rpc_message = &msg,
8087 .callback_ops = &nfs4_layoutreturn_call_ops,
8088 .callback_data = lrp,
8089 };
6c16605d 8090 int status = 0;
cbe82603
BH		 8091
8092 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8093 if (!sync) {
8094 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8095 if (!lrp->inode) {
8096 nfs4_layoutreturn_release(lrp);
8097 return -EAGAIN;
8098 }
8099 task_setup_data.flags |= RPC_TASK_ASYNC;
8100 }
a9c92d6b 8101 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8102 task = rpc_run_task(&task_setup_data);
8103 if (IS_ERR(task))
8104 return PTR_ERR(task);
5a0ec8ac
TM		 8105 if (sync)
8106 status = task->tk_status;
1037e6ea 8107 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8108 dprintk("<-- %s status=%d\n", __func__, status);
8109 rpc_put_task(task);
8110 return status;
8111}
8112
b1f69b75 8113static int
cd5875fe
TM		 8114_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8115 struct pnfs_device *pdev,
8116 struct rpc_cred *cred)
b1f69b75
AA		 8117{
8118 struct nfs4_getdeviceinfo_args args = {
8119 .pdev = pdev,
4e590803
TM		 8120 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8121 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8122 };
8123 struct nfs4_getdeviceinfo_res res = {
8124 .pdev = pdev,
8125 };
8126 struct rpc_message msg = {
8127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8128 .rpc_argp = &args,
8129 .rpc_resp = &res,
cd5875fe 8130 .rpc_cred = cred,
b1f69b75
AA		 8131 };
8132 int status;
8133
8134 dprintk("--> %s\n", __func__);
7c513058 8135 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8136 if (res.notification & ~args.notify_types)
8137 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8138 if (res.notification != args.notify_types)
8139 pdev->nocache = 1;
4e590803 8140
b1f69b75
AA		 8141 dprintk("<-- %s status=%d\n", __func__, status);
8142
8143 return status;
8144}
8145
cd5875fe
TM		 8146int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8147 struct pnfs_device *pdev,
8148 struct rpc_cred *cred)
b1f69b75
AA		 8149{
8150 struct nfs4_exception exception = { };
8151 int err;
8152
8153 do {
8154 err = nfs4_handle_exception(server,
cd5875fe 8155 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8156 &exception);
8157 } while (exception.retry);
8158 return err;
8159}
8160EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8161
863a3c6c
AA		 8162static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8163{
8164 struct nfs4_layoutcommit_data *data = calldata;
8165 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8166 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8167
d9afbd1b
TM		 8168 nfs41_setup_sequence(session,
8169 &data->args.seq_args,
8170 &data->res.seq_res,
8171 task);
863a3c6c
AA		 8172}
8173
8174static void
8175nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8176{
8177 struct nfs4_layoutcommit_data *data = calldata;
8178 struct nfs_server *server = NFS_SERVER(data->args.inode);
8179
6ba7db34 8180 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8181 return;
8182
8183 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8184 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8185 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8186 case -NFS4ERR_BADLAYOUT: /* no layout */
8187 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8188 task->tk_status = 0;
e59d27e0 8189 case 0:
e59d27e0
TM		 8190 break;
8191 default:
8478eaa1 8192 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8193 rpc_restart_call_prepare(task);
8194 return;
8195 }
8196 }
863a3c6c
AA		 8197}
8198
8199static void nfs4_layoutcommit_release(void *calldata)
8200{
8201 struct nfs4_layoutcommit_data *data = calldata;
8202
db29c089 8203 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8204 nfs_post_op_update_inode_force_wcc(data->args.inode,
8205 data->res.fattr);
863a3c6c 8206 put_rpccred(data->cred);
472e2594 8207 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8208 kfree(data);
8209}
8210
8211static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8212 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8213 .rpc_call_done = nfs4_layoutcommit_done,
8214 .rpc_release = nfs4_layoutcommit_release,
8215};
8216
8217int
ef311537 8218nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8219{
8220 struct rpc_message msg = {
8221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8222 .rpc_argp = &data->args,
8223 .rpc_resp = &data->res,
8224 .rpc_cred = data->cred,
8225 };
8226 struct rpc_task_setup task_setup_data = {
8227 .task = &data->task,
8228 .rpc_client = NFS_CLIENT(data->args.inode),
8229 .rpc_message = &msg,
8230 .callback_ops = &nfs4_layoutcommit_ops,
8231 .callback_data = data,
863a3c6c
AA		 8232 };
8233 struct rpc_task *task;
8234 int status = 0;
8235
b4839ebe
KM		 8236 dprintk("NFS: initiating layoutcommit call. sync %d "
8237 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8238 data->args.lastbytewritten,
8239 data->args.inode->i_ino);
8240
472e2594
TM		 8241 if (!sync) {
8242 data->inode = nfs_igrab_and_active(data->args.inode);
8243 if (data->inode == NULL) {
8244 nfs4_layoutcommit_release(data);
8245 return -EAGAIN;
8246 }
8247 task_setup_data.flags = RPC_TASK_ASYNC;
8248 }
a9c92d6b 8249 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8250 task = rpc_run_task(&task_setup_data);
8251 if (IS_ERR(task))
8252 return PTR_ERR(task);
472e2594
TM		 8253 if (sync)
8254 status = task->tk_status;
1037e6ea 8255 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8256 dprintk("%s: status %d\n", __func__, status);
8257 rpc_put_task(task);
8258 return status;
8259}
fca78d6d 8260
97431204
AA		 8261/**
8262 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8263 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8264 */
fca78d6d
BS		 8265static int
8266_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8267 struct nfs_fsinfo *info,
8268 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8269{
8270 struct nfs41_secinfo_no_name_args args = {
8271 .style = SECINFO_STYLE_CURRENT_FH,
8272 };
8273 struct nfs4_secinfo_res res = {
8274 .flavors = flavors,
8275 };
8276 struct rpc_message msg = {
8277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8278 .rpc_argp = &args,
8279 .rpc_resp = &res,
8280 };
b1b3e136 8281 struct rpc_clnt *clnt = server->client;
7cb852df 8282 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8283 int status;
8284
8285 if (use_integrity) {
8286 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8287 cred = nfs4_get_clid_cred(server->nfs_client);
8288 msg.rpc_cred = cred;
b1b3e136
WAA		 8289 }
8290
8291 dprintk("--> %s\n", __func__);
8292 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8293 &res.seq_res, 0);
8294 dprintk("<-- %s status=%d\n", __func__, status);
8295
7cb852df
WAA		 8296 if (cred)
8297 put_rpccred(cred);
b1b3e136
WAA		 8298
8299 return status;
fca78d6d
BS		 8300}
8301
8302static int
8303nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8304 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8305{
8306 struct nfs4_exception exception = { };
8307 int err;
8308 do {
b1b3e136
WAA		 8309 /* first try using integrity protection */
8310 err = -NFS4ERR_WRONGSEC;
8311
8312 /* try to use integrity protection with machine cred */
8313 if (_nfs4_is_integrity_protected(server->nfs_client))
8314 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8315 flavors, true);
8316
8317 /*
8318 * if unable to use integrity protection, or SECINFO with
8319 * integrity protection returns NFS4ERR_WRONGSEC (which is
8320 * disallowed by spec, but exists in deployed servers) use
8321 * the current filesystem's rpc_client and the user cred.
8322 */
8323 if (err == -NFS4ERR_WRONGSEC)
8324 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8325 flavors, false);
8326
fca78d6d
BS		 8327 switch (err) {
8328 case 0:
8329 case -NFS4ERR_WRONGSEC:
78b19bae 8330 case -ENOTSUPP:
05e9cfb4 8331 goto out;
fca78d6d
BS		 8332 default:
8333 err = nfs4_handle_exception(server, err, &exception);
8334 }
8335 } while (exception.retry);
05e9cfb4 8336out:
fca78d6d
BS		 8337 return err;
8338}
8339
8340static int
8341nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8342 struct nfs_fsinfo *info)
8343{
8344 int err;
8345 struct page *page;
367156d9 8346 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8347 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8348 struct nfs4_secinfo4 *secinfo;
8349 int i;
fca78d6d
BS		 8350
8351 page = alloc_page(GFP_KERNEL);
8352 if (!page) {
8353 err = -ENOMEM;
8354 goto out;
8355 }
8356
8357 flavors = page_address(page);
8358 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8359
8360 /*
8361 * Fall back on "guess and check" method if
8362 * the server doesn't support SECINFO_NO_NAME
8363 */
78b19bae 8364 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8365 err = nfs4_find_root_sec(server, fhandle, info);
8366 goto out_freepage;
8367 }
8368 if (err)
8369 goto out_freepage;
8370
58a8cf12
WAA		 8371 for (i = 0; i < flavors->num_flavors; i++) {
8372 secinfo = &flavors->flavors[i];
8373
8374 switch (secinfo->flavor) {
8375 case RPC_AUTH_NULL:
8376 case RPC_AUTH_UNIX:
8377 case RPC_AUTH_GSS:
8378 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8379 &secinfo->flavor_info);
8380 break;
8381 default:
8382 flavor = RPC_AUTH_MAXFLAVOR;
8383 break;
8384 }
8385
4d4b69dd
WAA		 8386 if (!nfs_auth_info_match(&server->auth_info, flavor))
8387 flavor = RPC_AUTH_MAXFLAVOR;
8388
58a8cf12
WAA		 8389 if (flavor != RPC_AUTH_MAXFLAVOR) {
8390 err = nfs4_lookup_root_sec(server, fhandle,
8391 info, flavor);
8392 if (!err)
8393 break;
8394 }
8395 }
8396
8397 if (flavor == RPC_AUTH_MAXFLAVOR)
8398 err = -EPERM;
fca78d6d
BS		 8399
8400out_freepage:
8401 put_page(page);
8402 if (err == -EACCES)
8403 return -EPERM;
8404out:
8405 return err;
8406}
1cab0652 8407
ab7cb0df
TM		 8408static int _nfs41_test_stateid(struct nfs_server *server,
8409 nfs4_stateid *stateid,
8410 struct rpc_cred *cred)
7d974794
BS		 8411{
8412 int status;
8413 struct nfs41_test_stateid_args args = {
1cab0652 8414 .stateid = stateid,
7d974794
BS		 8415 };
8416 struct nfs41_test_stateid_res res;
8417 struct rpc_message msg = {
8418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8419 .rpc_argp = &args,
8420 .rpc_resp = &res,
ab7cb0df 8421 .rpc_cred = cred,
7d974794 8422 };
3787d506
WAA		 8423 struct rpc_clnt *rpc_client = server->client;
8424
8425 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8426 &rpc_client, &msg);
1cab0652 8427
38527b15 8428 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8429 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8430 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8431 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8432 &args.seq_args, &res.seq_res);
38527b15
CL		 8433 if (status != NFS_OK) {
8434 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8435 return status;
38527b15
CL		 8436 }
8437 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8438 return -res.status;
7d974794
BS		 8439}
8440
38527b15
CL		 8441/**
8442 * nfs41_test_stateid - perform a TEST_STATEID operation
8443 *
8444 * @server: server / transport on which to perform the operation
8445 * @stateid: state ID to test
ab7cb0df 8446 * @cred: credential
38527b15
CL		 8447 *
8448 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8449 * Otherwise a negative NFS4ERR value is returned if the operation
8450 * failed or the state ID is not currently valid.
8451 */
ab7cb0df
TM		 8452static int nfs41_test_stateid(struct nfs_server *server,
8453 nfs4_stateid *stateid,
8454 struct rpc_cred *cred)
7d974794
BS		 8455{
8456 struct nfs4_exception exception = { };
8457 int err;
8458 do {
ab7cb0df 8459 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8460 if (err != -NFS4ERR_DELAY)
8461 break;
8462 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8463 } while (exception.retry);
8464 return err;
8465}
9aeda35f 8466
7c1d5fae
TM		 8467struct nfs_free_stateid_data {
8468 struct nfs_server *server;
8469 struct nfs41_free_stateid_args args;
9aeda35f 8470 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8471};
8472
8473static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8474{
8475 struct nfs_free_stateid_data *data = calldata;
8476 nfs41_setup_sequence(nfs4_get_session(data->server),
8477 &data->args.seq_args,
8478 &data->res.seq_res,
8479 task);
8480}
8481
8482static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8483{
8484 struct nfs_free_stateid_data *data = calldata;
8485
8486 nfs41_sequence_done(task, &data->res.seq_res);
8487
8488 switch (task->tk_status) {
8489 case -NFS4ERR_DELAY:
8478eaa1 8490 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8491 rpc_restart_call_prepare(task);
8492 }
8493}
8494
8495static void nfs41_free_stateid_release(void *calldata)
8496{
8497 kfree(calldata);
8498}
8499
17f26b12 8500static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8501 .rpc_call_prepare = nfs41_free_stateid_prepare,
8502 .rpc_call_done = nfs41_free_stateid_done,
8503 .rpc_release = nfs41_free_stateid_release,
8504};
8505
8506static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8507 nfs4_stateid *stateid,
ab7cb0df 8508 struct rpc_cred *cred,
7c1d5fae
TM		 8509 bool privileged)
8510{
9aeda35f
BS		 8511 struct rpc_message msg = {
8512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8513 .rpc_cred = cred,
9aeda35f 8514 };
7c1d5fae
TM		 8515 struct rpc_task_setup task_setup = {
8516 .rpc_client = server->client,
8517 .rpc_message = &msg,
8518 .callback_ops = &nfs41_free_stateid_ops,
8519 .flags = RPC_TASK_ASYNC,
8520 };
8521 struct nfs_free_stateid_data *data;
9aeda35f 8522
3787d506
WAA		 8523 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8524 &task_setup.rpc_client, &msg);
8525
38527b15 8526 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8527 data = kmalloc(sizeof(*data), GFP_NOFS);
8528 if (!data)
8529 return ERR_PTR(-ENOMEM);
8530 data->server = server;
8531 nfs4_stateid_copy(&data->args.stateid, stateid);
8532
8533 task_setup.callback_data = data;
8534
8535 msg.rpc_argp = &data->args;
8536 msg.rpc_resp = &data->res;
a9c92d6b 8537 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8538 if (privileged)
8539 nfs4_set_sequence_privileged(&data->args.seq_args);
8540
8541 return rpc_run_task(&task_setup);
9aeda35f
BS		 8542}
8543
38527b15
CL		 8544/**
8545 * nfs41_free_stateid - perform a FREE_STATEID operation
8546 *
8547 * @server: server / transport on which to perform the operation
8548 * @stateid: state ID to release
ab7cb0df 8549 * @cred: credential
38527b15
CL		 8550 *
8551 * Returns NFS_OK if the server freed "stateid". Otherwise a
8552 * negative NFS4ERR value is returned.
8553 */
ab7cb0df
TM		 8554static int nfs41_free_stateid(struct nfs_server *server,
8555 nfs4_stateid *stateid,
8556 struct rpc_cred *cred)
9aeda35f 8557{
7c1d5fae
TM		 8558 struct rpc_task *task;
8559 int ret;
8560
ab7cb0df 8561 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8562 if (IS_ERR(task))
8563 return PTR_ERR(task);
8564 ret = rpc_wait_for_completion_task(task);
8565 if (!ret)
8566 ret = task->tk_status;
8567 rpc_put_task(task);
8568 return ret;
9aeda35f 8569}
36281caa 8570
f1cdae87
JL		 8571static void
8572nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8573{
8574 struct rpc_task *task;
ab7cb0df 8575 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8576
ab7cb0df 8577 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8578 nfs4_free_lock_state(server, lsp);
8579 if (IS_ERR(task))
f1cdae87 8580 return;
c8b2d0bf 8581 rpc_put_task(task);
c8b2d0bf
TM		 8582}
8583
36281caa
TM		 8584static bool nfs41_match_stateid(const nfs4_stateid *s1,
8585 const nfs4_stateid *s2)
8586{
2d2f24ad 8587 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8588 return false;
8589
2d2f24ad 8590 if (s1->seqid == s2->seqid)
36281caa 8591 return true;
2d2f24ad 8592 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8593 return true;
8594
8595 return false;
8596}
8597
557134a3
AA		 8598#endif /* CONFIG_NFS_V4_1 */
8599
36281caa
TM		 8600static bool nfs4_match_stateid(const nfs4_stateid *s1,
8601 const nfs4_stateid *s2)
8602{
f597c537 8603 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8604}
8605
8606
17280175 8607static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8608 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8609 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8610 .recover_open = nfs4_open_reclaim,
8611 .recover_lock = nfs4_lock_reclaim,
591d71cb 8612 .establish_clid = nfs4_init_clientid,
05f4c350 8613 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8614};
8615
591d71cb 8616#if defined(CONFIG_NFS_V4_1)
17280175 8617static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8618 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8619 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8620 .recover_open = nfs4_open_reclaim,
8621 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8622 .establish_clid = nfs41_init_clientid,
fce5c838 8623 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8624 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8625};
8626#endif /* CONFIG_NFS_V4_1 */
8627
17280175 8628static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8629 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8630 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8631 .recover_open = nfs40_open_expired,
591d71cb
AA		 8632 .recover_lock = nfs4_lock_expired,
8633 .establish_clid = nfs4_init_clientid,
8634};
8635
8636#if defined(CONFIG_NFS_V4_1)
17280175 8637static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8638 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8639 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8640 .recover_open = nfs41_open_expired,
8641 .recover_lock = nfs41_lock_expired,
4d643d1d 8642 .establish_clid = nfs41_init_clientid,
1da177e4 8643};
591d71cb 8644#endif /* CONFIG_NFS_V4_1 */
1da177e4 8645
17280175 8646static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8647 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8648 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8649 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8650};
8651
8652#if defined(CONFIG_NFS_V4_1)
17280175 8653static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8654 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8655 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8656 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8657};
8658#endif
8659
ec011fe8 8660static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8661 .get_locations = _nfs40_proc_get_locations,
44c99933 8662 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8663};
8664
8665#if defined(CONFIG_NFS_V4_1)
8666static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8667 .get_locations = _nfs41_proc_get_locations,
44c99933 8668 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8669};
8670#endif /* CONFIG_NFS_V4_1 */
8671
97dc1359
TM		 8672static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8673 .minor_version = 0,
39c6daae
TM		 8674 .init_caps = NFS_CAP_READDIRPLUS
8675 | NFS_CAP_ATOMIC_OPEN
39c6daae 8676 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8677 .init_client = nfs40_init_client,
8678 .shutdown_client = nfs40_shutdown_client,
36281caa 8679 .match_stateid = nfs4_match_stateid,
fca78d6d 8680 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8681 .free_lock_state = nfs4_release_lockowner,
63f5f796 8682 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8683 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8684 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8685 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8686 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8687 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8688};
8689
8690#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8691static struct nfs_seqid *
8692nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8693{
8694 return NULL;
8695}
8696
97dc1359
TM		 8697static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8698 .minor_version = 1,
39c6daae
TM		 8699 .init_caps = NFS_CAP_READDIRPLUS
8700 | NFS_CAP_ATOMIC_OPEN
3b66486c 8701 | NFS_CAP_POSIX_LOCK
49f9a0fa 8702 | NFS_CAP_STATEID_NFSV41
e983120e 8703 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8704 .init_client = nfs41_init_client,
8705 .shutdown_client = nfs41_shutdown_client,
36281caa 8706 .match_stateid = nfs41_match_stateid,
fca78d6d 8707 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8708 .free_lock_state = nfs41_free_lock_state,
63f5f796 8709 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8710 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8711 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8712 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8713 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8714 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8715};
8716#endif
8717
42c2c424
SD		 8718#if defined(CONFIG_NFS_V4_2)
8719static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8720 .minor_version = 2,
7017310a
BS		 8721 .init_caps = NFS_CAP_READDIRPLUS
8722 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8723 | NFS_CAP_POSIX_LOCK
8724 | NFS_CAP_STATEID_NFSV41
e983120e 8725 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8726 | NFS_CAP_ALLOCATE
624bd5b7 8727 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8728 | NFS_CAP_SEEK
8729 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8730 .init_client = nfs41_init_client,
8731 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8732 .match_stateid = nfs41_match_stateid,
8733 .find_root_sec = nfs41_find_root_sec,
7017310a 8734 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8735 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8736 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8737 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8738 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8739 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8740 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8741};
8742#endif
8743
97dc1359
TM		 8744const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8745 [0] = &nfs_v4_0_minor_ops,
8746#if defined(CONFIG_NFS_V4_1)
8747 [1] = &nfs_v4_1_minor_ops,
8748#endif
42c2c424
SD		 8749#if defined(CONFIG_NFS_V4_2)
8750 [2] = &nfs_v4_2_minor_ops,
8751#endif
97dc1359
TM		 8752};
8753
17f26b12 8754static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8755 .create = nfs_create,
8756 .lookup = nfs_lookup,
8757 .atomic_open = nfs_atomic_open,
8758 .link = nfs_link,
8759 .unlink = nfs_unlink,
8760 .symlink = nfs_symlink,
8761 .mkdir = nfs_mkdir,
8762 .rmdir = nfs_rmdir,
8763 .mknod = nfs_mknod,
8764 .rename = nfs_rename,
8765 .permission = nfs_permission,
8766 .getattr = nfs_getattr,
8767 .setattr = nfs_setattr,
8768 .getxattr = generic_getxattr,
8769 .setxattr = generic_setxattr,
8770 .listxattr = generic_listxattr,
8771 .removexattr = generic_removexattr,
8772};
8773
92e1d5be 8774static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8775 .permission = nfs_permission,
8776 .getattr = nfs_getattr,
8777 .setattr = nfs_setattr,
64c2ce8b
AK		 8778 .getxattr = generic_getxattr,
8779 .setxattr = generic_setxattr,
8780 .listxattr = generic_listxattr,
8781 .removexattr = generic_removexattr,
6b3b5496
BF		 8782};
8783
509de811 8784const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8785 .version = 4, /* protocol version */
8786 .dentry_ops = &nfs4_dentry_operations,
8787 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8788 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8789 .file_ops = &nfs4_file_operations,
1da177e4 8790 .getroot = nfs4_proc_get_root,
281cad46 8791 .submount = nfs4_submount,
ff9099f2 8792 .try_mount = nfs4_try_mount,
1da177e4
LT		 8793 .getattr = nfs4_proc_getattr,
8794 .setattr = nfs4_proc_setattr,
8795 .lookup = nfs4_proc_lookup,
8796 .access = nfs4_proc_access,
8797 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8798 .create = nfs4_proc_create,
8799 .remove = nfs4_proc_remove,
8800 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8801 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8802 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8803 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8804 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8805 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8806 .link = nfs4_proc_link,
8807 .symlink = nfs4_proc_symlink,
8808 .mkdir = nfs4_proc_mkdir,
8809 .rmdir = nfs4_proc_remove,
8810 .readdir = nfs4_proc_readdir,
8811 .mknod = nfs4_proc_mknod,
8812 .statfs = nfs4_proc_statfs,
8813 .fsinfo = nfs4_proc_fsinfo,
8814 .pathconf = nfs4_proc_pathconf,
e9326dca 8815 .set_capabilities = nfs4_server_capabilities,
1da177e4 8816 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8817 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8818 .read_setup = nfs4_proc_read_setup,
ec06c096 8819 .read_done = nfs4_read_done,
1da177e4 8820 .write_setup = nfs4_proc_write_setup,
788e7a89 8821 .write_done = nfs4_write_done,
1da177e4 8822 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8823 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8824 .commit_done = nfs4_commit_done,
1da177e4 8825 .lock = nfs4_proc_lock,
e50a1c2e 8826 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8827 .close_context = nfs4_close_context,
2b484297 8828 .open_context = nfs4_atomic_open,
011e2a7f 8829 .have_delegation = nfs4_have_delegation,
57ec14c5 8830 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8831 .alloc_client = nfs4_alloc_client,
45a52a02 8832 .init_client = nfs4_init_client,
cdb7eced 8833 .free_client = nfs4_free_client,
1179acc6
BS		 8834 .create_server = nfs4_create_server,
8835 .clone_server = nfs_clone_server,
1da177e4
LT		 8836};
8837
64c2ce8b
AK		 8838static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8839 .prefix = XATTR_NAME_NFSV4_ACL,
8840 .list = nfs4_xattr_list_nfs4_acl,
8841 .get = nfs4_xattr_get_nfs4_acl,
8842 .set = nfs4_xattr_set_nfs4_acl,
8843};
8844
8845const struct xattr_handler *nfs4_xattr_handlers[] = {
8846 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8847#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8848 &nfs4_xattr_nfs4_label_handler,
8849#endif
64c2ce8b
AK		 8850 NULL
8851};
8852
1da177e4
LT		 8853/*
8854 * Local variables:
8855 * c-basic-offset: 8
8856 * End:
8857 */
Linux 6.x block layer and io_uring tree(s)