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