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NFSv4.1: nfs41_sequence_done should handle sequence flag errors
[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{
470 do_renew_lease(server->nfs_client, timestamp);
471}
472
2a3eb2b9
CL		 473struct nfs4_call_sync_data {
474 const struct nfs_server *seq_server;
475 struct nfs4_sequence_args *seq_args;
476 struct nfs4_sequence_res *seq_res;
477};
478
be3a5d23
TM		 479void nfs4_init_sequence(struct nfs4_sequence_args *args,
480 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 481{
482 args->sa_slot = NULL;
483 args->sa_cache_this = cache_reply;
484 args->sa_privileged = 0;
485
486 res->sr_slot = NULL;
487}
488
489static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
490{
491 args->sa_privileged = 1;
492}
493
cb04ad2a
PT		 494int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
495 struct nfs4_sequence_args *args,
496 struct nfs4_sequence_res *res,
497 struct rpc_task *task)
3bd2384a 498{
3bd2384a
CL		 499 struct nfs4_slot *slot;
500
501 /* slot already allocated? */
502 if (res->sr_slot != NULL)
503 goto out_start;
504
505 spin_lock(&tbl->slot_tbl_lock);
506 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
507 goto out_sleep;
508
509 slot = nfs4_alloc_slot(tbl);
510 if (IS_ERR(slot)) {
511 if (slot == ERR_PTR(-ENOMEM))
512 task->tk_timeout = HZ >> 2;
513 goto out_sleep;
514 }
515 spin_unlock(&tbl->slot_tbl_lock);
516
517 args->sa_slot = slot;
518 res->sr_slot = slot;
519
520out_start:
521 rpc_call_start(task);
522 return 0;
523
524out_sleep:
525 if (args->sa_privileged)
526 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
527 NULL, RPC_PRIORITY_PRIVILEGED);
528 else
529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
530 spin_unlock(&tbl->slot_tbl_lock);
531 return -EAGAIN;
532}
cb04ad2a 533EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 534
535static int nfs40_sequence_done(struct rpc_task *task,
536 struct nfs4_sequence_res *res)
537{
538 struct nfs4_slot *slot = res->sr_slot;
539 struct nfs4_slot_table *tbl;
540
cab92c19 541 if (slot == NULL)
3bd2384a
CL		 542 goto out;
543
544 tbl = slot->table;
545 spin_lock(&tbl->slot_tbl_lock);
546 if (!nfs41_wake_and_assign_slot(tbl, slot))
547 nfs4_free_slot(tbl, slot);
548 spin_unlock(&tbl->slot_tbl_lock);
549
550 res->sr_slot = NULL;
551out:
552 return 1;
553}
554
cccef3b9
AA		 555#if defined(CONFIG_NFS_V4_1)
556
d185a334 557static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 558{
e3725ec0 559 struct nfs4_session *session;
13615871 560 struct nfs4_slot_table *tbl;
a13ce7c6 561 struct nfs4_slot *slot = res->sr_slot;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
a13ce7c6 564 tbl = slot->table;
e3725ec0 565 session = tbl->session;
ea028ac9 566
35dc1d74 567 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 568 /* Be nice to the server: try to ensure that the last transmitted
569 * value for highest_user_slotid <= target_highest_slotid
570 */
571 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
572 send_new_highest_used_slotid = true;
573
a13ce7c6 574 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 575 send_new_highest_used_slotid = false;
576 goto out_unlock;
577 }
a13ce7c6 578 nfs4_free_slot(tbl, slot);
c10e4498
TM		 579
580 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
581 send_new_highest_used_slotid = false;
b75ad4cd 582out_unlock:
35dc1d74 583 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 584 res->sr_slot = NULL;
c10e4498
TM		 585 if (send_new_highest_used_slotid)
586 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 587}
588
f9c96fcc 589int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 590{
e3725ec0 591 struct nfs4_session *session;
a13ce7c6 592 struct nfs4_slot *slot = res->sr_slot;
14516c3a 593 struct nfs_client *clp;
ac20d163 594 bool interrupted = false;
85563073 595 int ret = 1;
b0df806c 596
a13ce7c6
TM		 597 if (slot == NULL)
598 goto out_noaction;
468f8613
BS		 599 /* don't increment the sequence number if the task wasn't sent */
600 if (!RPC_WAS_SENT(task))
b0df806c
AA		 601 goto out;
602
e3725ec0 603 session = slot->table->session;
933602e3 604
ac20d163
TM		 605 if (slot->interrupted) {
606 slot->interrupted = 0;
607 interrupted = true;
608 }
609
2f92ae34 610 trace_nfs4_sequence_done(session, res);
691daf3b 611 /* Check the SEQUENCE operation status */
14516c3a
TM		 612 switch (res->sr_status) {
613 case 0:
b0df806c 614 /* Update the slot's sequence and clientid lease timer */
933602e3 615 ++slot->seq_nr;
e3725ec0 616 clp = session->clp;
8e63b6a8 617 do_renew_lease(clp, res->sr_timestamp);
0629e370 618 /* Check sequence flags */
b15c7cdd 619 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 620 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 621 break;
ac20d163
TM		 622 case 1:
623 /*
624 * sr_status remains 1 if an RPC level error occurred.
625 * The server may or may not have processed the sequence
626 * operation..
627 * Mark the slot as having hosted an interrupted RPC call.
628 */
629 slot->interrupted = 1;
630 goto out;
14516c3a
TM		 631 case -NFS4ERR_DELAY:
632 /* The server detected a resend of the RPC call and
633 * returned NFS4ERR_DELAY as per Section 2.10.6.2
634 * of RFC5661.
635 */
df2fabff 636 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 637 __func__,
df2fabff 638 slot->slot_nr,
933602e3 639 slot->seq_nr);
14516c3a 640 goto out_retry;
85563073
TM		 641 case -NFS4ERR_BADSLOT:
642 /*
643 * The slot id we used was probably retired. Try again
644 * using a different slot id.
645 */
e8794440
TM		 646 goto retry_nowait;
647 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 648 /*
649 * Was the last operation on this sequence interrupted?
650 * If so, retry after bumping the sequence number.
651 */
652 if (interrupted) {
653 ++slot->seq_nr;
654 goto retry_nowait;
655 }
e8794440
TM		 656 /*
657 * Could this slot have been previously retired?
658 * If so, then the server may be expecting seq_nr = 1!
659 */
8e63b6a8
TM		 660 if (slot->seq_nr != 1) {
661 slot->seq_nr = 1;
662 goto retry_nowait;
663 }
664 break;
e8794440
TM		 665 case -NFS4ERR_SEQ_FALSE_RETRY:
666 ++slot->seq_nr;
667 goto retry_nowait;
14516c3a
TM		 668 default:
669 /* Just update the slot sequence no. */
933602e3 670 ++slot->seq_nr;
b0df806c
AA		 671 }
672out:
673 /* The session may be reset by one of the error handlers. */
674 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 675 nfs41_sequence_free_slot(res);
a13ce7c6 676out_noaction:
85563073 677 return ret;
e8794440
TM		 678retry_nowait:
679 if (rpc_restart_call_prepare(task)) {
680 task->tk_status = 0;
681 ret = 0;
682 }
683 goto out;
14516c3a 684out_retry:
d05dd4e9 685 if (!rpc_restart_call(task))
14516c3a
TM		 686 goto out;
687 rpc_delay(task, NFS4_POLL_RETRY_MAX);
688 return 0;
b0df806c 689}
f9c96fcc 690EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 691
2c4b131d 692int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 693{
e3725ec0 694 if (res->sr_slot == NULL)
14516c3a 695 return 1;
3bd2384a
CL		 696 if (!res->sr_slot->table->session)
697 return nfs40_sequence_done(task, res);
14516c3a 698 return nfs41_sequence_done(task, res);
df896455 699}
2c4b131d 700EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 701
dc70d7b3 702int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 703 struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res,
ce5039c1
AA		 705 struct rpc_task *task)
706{
fbcd4abc
AA		 707 struct nfs4_slot *slot;
708 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 709
710 dprintk("--> %s\n", __func__);
ce5039c1 711 /* slot already allocated? */
dfb4f309 712 if (res->sr_slot != NULL)
d9afbd1b 713 goto out_success;
ce5039c1 714
fbcd4abc
AA		 715 tbl = &session->fc_slot_table;
716
69d206b5
TM		 717 task->tk_timeout = 0;
718
fbcd4abc 719 spin_lock(&tbl->slot_tbl_lock);
774d5f14 720 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 721 !args->sa_privileged) {
0b1c8fc4 722 /* The state manager will wait until the slot table is empty */
0b1c8fc4 723 dprintk("%s session is draining\n", __func__);
7b939a3f 724 goto out_sleep;
689cf5c1
AB		 725 }
726
2dc03b7f 727 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 728 if (IS_ERR(slot)) {
729 /* If out of memory, try again in 1/4 second */
730 if (slot == ERR_PTR(-ENOMEM))
731 task->tk_timeout = HZ >> 2;
fbcd4abc 732 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 733 goto out_sleep;
fbcd4abc
AA		 734 }
735 spin_unlock(&tbl->slot_tbl_lock);
736
2b2fa717 737 args->sa_slot = slot;
fbcd4abc 738
e8d92382 739 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 740 slot->slot_nr, slot->seq_nr);
fbcd4abc 741
dfb4f309 742 res->sr_slot = slot;
8e63b6a8 743 res->sr_timestamp = jiffies;
2a6e26cd 744 res->sr_status_flags = 0;
fbcd4abc
AA		 745 /*
746 * sr_status is only set in decode_sequence, and so will remain
747 * set to 1 if an rpc level failure occurs.
748 */
749 res->sr_status = 1;
2f92ae34 750 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 751out_success:
752 rpc_call_start(task);
ce5039c1 753 return 0;
7b939a3f 754out_sleep:
8fe72bac
TM		 755 /* Privileged tasks are queued with top priority */
756 if (args->sa_privileged)
1e1093c7
TM		 757 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
758 NULL, RPC_PRIORITY_PRIVILEGED);
759 else
760 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 761 spin_unlock(&tbl->slot_tbl_lock);
762 return -EAGAIN;
ce5039c1 763}
dc70d7b3 764EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 765
5a580e0a
CL		 766static int nfs4_setup_sequence(const struct nfs_server *server,
767 struct nfs4_sequence_args *args,
768 struct nfs4_sequence_res *res,
769 struct rpc_task *task)
ce5039c1 770{
035168ab 771 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 772 int ret = 0;
773
3bd2384a 774 if (!session)
cb04ad2a
PT		 775 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
776 args, res, task);
035168ab 777
e8d92382 778 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 779 __func__, session->clp, session, res->sr_slot ?
e8d92382 780 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 781
9d12b216 782 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 783
ce5039c1
AA		 784 dprintk("<-- %s status=%d\n", __func__, ret);
785 return ret;
786}
787
ce5039c1
AA		 788static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
789{
2a3eb2b9 790 struct nfs4_call_sync_data *data = calldata;
6ba7db34 791 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 792
035168ab
TM		 793 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
794
d9afbd1b 795 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 796}
797
69ab40c4
AA		 798static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
799{
2a3eb2b9 800 struct nfs4_call_sync_data *data = calldata;
69ab40c4 801
14516c3a 802 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 803}
804
17280175 805static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 806 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 807 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 808};
809
3bd2384a
CL		 810#else /* !CONFIG_NFS_V4_1 */
811
9915ea7e
CL		 812static int nfs4_setup_sequence(const struct nfs_server *server,
813 struct nfs4_sequence_args *args,
814 struct nfs4_sequence_res *res,
815 struct rpc_task *task)
816{
cb04ad2a
PT		 817 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
818 args, res, task);
9915ea7e
CL		 819}
820
2c4b131d
PT		 821int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
9915ea7e 823{
3bd2384a 824 return nfs40_sequence_done(task, res);
9915ea7e 825}
2c4b131d 826EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 827
828#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 829
830static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
831{
832 struct nfs4_call_sync_data *data = calldata;
833 nfs4_setup_sequence(data->seq_server,
834 data->seq_args, data->seq_res, task);
835}
836
837static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
838{
839 struct nfs4_call_sync_data *data = calldata;
840 nfs4_sequence_done(task, data->seq_res);
841}
842
843static const struct rpc_call_ops nfs40_call_sync_ops = {
844 .rpc_call_prepare = nfs40_call_sync_prepare,
845 .rpc_call_done = nfs40_call_sync_done,
846};
847
7c513058
BS		 848static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
849 struct nfs_server *server,
ce5039c1
AA		 850 struct rpc_message *msg,
851 struct nfs4_sequence_args *args,
8fe72bac 852 struct nfs4_sequence_res *res)
ce5039c1
AA		 853{
854 int ret;
855 struct rpc_task *task;
9915ea7e 856 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 857 struct nfs4_call_sync_data data = {
035168ab 858 .seq_server = server,
ce5039c1
AA		 859 .seq_args = args,
860 .seq_res = res,
ce5039c1
AA		 861 };
862 struct rpc_task_setup task_setup = {
7c513058 863 .rpc_client = clnt,
ce5039c1 864 .rpc_message = msg,
9915ea7e 865 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 866 .callback_data = &data
867 };
868
ce5039c1
AA		 869 task = rpc_run_task(&task_setup);
870 if (IS_ERR(task))
871 ret = PTR_ERR(task);
872 else {
873 ret = task->tk_status;
874 rpc_put_task(task);
875 }
876 return ret;
877}
878
7c513058
BS		 879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
e73b83f2
BS		 881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
a9c92d6b 886 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 888}
cccef3b9 889
38478b24 890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 891{
38478b24 892 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 893
38478b24 894 spin_lock(&dir->i_lock);
359d7d1c 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 896 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 897 nfs_force_lookup_revalidate(dir);
a9a4a87a 898 dir->i_version = cinfo->after;
3235b403 899 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 900 nfs_fscache_invalidate(dir);
38478b24 901 spin_unlock(&dir->i_lock);
1da177e4
LT		 902}
903
e56e0b78 904struct nfs4_opendata {
c6d00e63 905 struct kref kref;
e56e0b78
TM		 906 struct nfs_openargs o_arg;
907 struct nfs_openres o_res;
cdd4e68b
TM		 908 struct nfs_open_confirmargs c_arg;
909 struct nfs_open_confirmres c_res;
6926afd1
TM		 910 struct nfs4_string owner_name;
911 struct nfs4_string group_name;
e56e0b78 912 struct nfs_fattr f_attr;
1775fd3e 913 struct nfs4_label *f_label;
e56e0b78 914 struct dentry *dir;
82a2c1b7 915 struct dentry *dentry;
e56e0b78 916 struct nfs4_state_owner *owner;
aac00a8d 917 struct nfs4_state *state;
e56e0b78 918 struct iattr attrs;
26e976a8 919 unsigned long timestamp;
3e309914 920 unsigned int rpc_done : 1;
5bc2afc2 921 unsigned int file_created : 1;
bdeca1b7 922 unsigned int is_recover : 1;
24ac23ab
TM		 923 int rpc_status;
924 int cancelled;
e56e0b78
TM		 925};
926
49f9a0fa
TM		 927static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
928 int err, struct nfs4_exception *exception)
929{
930 if (err != -EINVAL)
931 return false;
932 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
933 return false;
934 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
935 exception->retry = 1;
936 return true;
937}
938
6ae37339
TM		 939static u32
940nfs4_map_atomic_open_share(struct nfs_server *server,
941 fmode_t fmode, int openflags)
942{
943 u32 res = 0;
944
945 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
946 case FMODE_READ:
947 res = NFS4_SHARE_ACCESS_READ;
948 break;
949 case FMODE_WRITE:
950 res = NFS4_SHARE_ACCESS_WRITE;
951 break;
952 case FMODE_READ|FMODE_WRITE:
953 res = NFS4_SHARE_ACCESS_BOTH;
954 }
955 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
956 goto out;
957 /* Want no delegation if we're using O_DIRECT */
958 if (openflags & O_DIRECT)
959 res |= NFS4_SHARE_WANT_NO_DELEG;
960out:
961 return res;
962}
963
49f9a0fa
TM		 964static enum open_claim_type4
965nfs4_map_atomic_open_claim(struct nfs_server *server,
966 enum open_claim_type4 claim)
967{
968 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
969 return claim;
970 switch (claim) {
971 default:
972 return claim;
973 case NFS4_OPEN_CLAIM_FH:
974 return NFS4_OPEN_CLAIM_NULL;
975 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
976 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
977 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
978 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
979 }
980}
2ced46c2
TM		 981
982static void nfs4_init_opendata_res(struct nfs4_opendata *p)
983{
984 p->o_res.f_attr = &p->f_attr;
1775fd3e 985 p->o_res.f_label = p->f_label;
c1d51931
TM		 986 p->o_res.seqid = p->o_arg.seqid;
987 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 988 p->o_res.server = p->o_arg.server;
5f657530 989 p->o_res.access_request = p->o_arg.access;
2ced46c2 990 nfs_fattr_init(&p->f_attr);
6926afd1 991 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 992}
993
82a2c1b7 994static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 995 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 996 const struct iattr *attrs,
1775fd3e 997 struct nfs4_label *label,
4a1c0893 998 enum open_claim_type4 claim,
8535b2be 999 gfp_t gfp_mask)
e56e0b78 1000{
82a2c1b7 1001 struct dentry *parent = dget_parent(dentry);
2b0143b5 1002 struct inode *dir = d_inode(parent);
e56e0b78 1003 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1004 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1005 struct nfs4_opendata *p;
1006
8535b2be 1007 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1008 if (p == NULL)
1009 goto err;
14c43f76
DQ		 1010
1011 p->f_label = nfs4_label_alloc(server, gfp_mask);
1012 if (IS_ERR(p->f_label))
1013 goto err_free_p;
1014
63f5f796
TM		 1015 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1016 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1017 if (IS_ERR(p->o_arg.seqid))
14c43f76 1018 goto err_free_label;
82a2c1b7
AV		 1019 nfs_sb_active(dentry->d_sb);
1020 p->dentry = dget(dentry);
e56e0b78
TM		 1021 p->dir = parent;
1022 p->owner = sp;
1023 atomic_inc(&sp->so_count);
dc0b027d
TM		 1024 p->o_arg.open_flags = flags;
1025 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1026 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1027 fmode, flags);
ae2bb032
WAA		 1028 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1029 * will return permission denied for all bits until close */
1030 if (!(flags & O_EXCL)) {
1031 /* ask server to check for all possible rights as results
1032 * are cached */
1033 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1034 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1035 }
7539bbab 1036 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1037 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1038 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1039 p->o_arg.name = &dentry->d_name;
e56e0b78 1040 p->o_arg.server = server;
aa9c2669 1041 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1042 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1043 p->o_arg.label = label;
49f9a0fa
TM		 1044 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1045 switch (p->o_arg.claim) {
4a1c0893
TM		 1046 case NFS4_OPEN_CLAIM_NULL:
1047 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1048 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1049 p->o_arg.fh = NFS_FH(dir);
1050 break;
1051 case NFS4_OPEN_CLAIM_PREVIOUS:
1052 case NFS4_OPEN_CLAIM_FH:
1053 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1054 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1055 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1056 }
536e43d1 1057 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1058 __u32 verf[2];
d77d76ff 1059
e56e0b78
TM		 1060 p->o_arg.u.attrs = &p->attrs;
1061 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1062
1063 verf[0] = jiffies;
1064 verf[1] = current->pid;
1065 memcpy(p->o_arg.u.verifier.data, verf,
1066 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1067 }
cdd4e68b
TM		 1068 p->c_arg.fh = &p->o_res.fh;
1069 p->c_arg.stateid = &p->o_res.stateid;
1070 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1071 nfs4_init_opendata_res(p);
c6d00e63 1072 kref_init(&p->kref);
e56e0b78 1073 return p;
14c43f76
DQ		 1074
1075err_free_label:
1076 nfs4_label_free(p->f_label);
1077err_free_p:
e56e0b78
TM		 1078 kfree(p);
1079err:
1080 dput(parent);
1081 return NULL;
1082}
1083
c6d00e63 1084static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1085{
c6d00e63
TM		 1086 struct nfs4_opendata *p = container_of(kref,
1087 struct nfs4_opendata, kref);
82a2c1b7 1088 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1089
1090 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1091 if (p->state != NULL)
1092 nfs4_put_open_state(p->state);
c6d00e63 1093 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1094
1095 nfs4_label_free(p->f_label);
1096
c6d00e63 1097 dput(p->dir);
82a2c1b7
AV		 1098 dput(p->dentry);
1099 nfs_sb_deactive(sb);
6926afd1 1100 nfs_fattr_free_names(&p->f_attr);
e911b815 1101 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1102 kfree(p);
1103}
1104
1105static void nfs4_opendata_put(struct nfs4_opendata *p)
1106{
1107 if (p != NULL)
1108 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1109}
1110
06f814a3
TM		 1111static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1112{
06f814a3
TM		 1113 int ret;
1114
06f814a3 1115 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1116 return ret;
1117}
1118
dc0b027d 1119static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1120{
1121 int ret = 0;
dc0b027d 1122
536e43d1 1123 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1124 goto out;
1125 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1126 case FMODE_READ:
88069f77
TM		 1127 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1128 && state->n_rdonly != 0;
6ee41268
TM		 1129 break;
1130 case FMODE_WRITE:
88069f77
TM		 1131 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1132 && state->n_wronly != 0;
6ee41268
TM		 1133 break;
1134 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1135 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1136 && state->n_rdwr != 0;
6ee41268 1137 }
dc0b027d 1138out:
6ee41268
TM		 1139 return ret;
1140}
1141
dc0b027d 1142static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1143{
652f89f6
TM		 1144 if (delegation == NULL)
1145 return 0;
dc0b027d 1146 if ((delegation->type & fmode) != fmode)
aac00a8d 1147 return 0;
d25be546
TM		 1148 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1149 return 0;
b7391f44 1150 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1151 return 1;
1152}
1153
dc0b027d 1154static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1155{
dc0b027d 1156 switch (fmode) {
e7616923
TM		 1157 case FMODE_WRITE:
1158 state->n_wronly++;
1159 break;
1160 case FMODE_READ:
1161 state->n_rdonly++;
1162 break;
1163 case FMODE_READ|FMODE_WRITE:
1164 state->n_rdwr++;
1165 }
dc0b027d 1166 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1167}
1168
4f14c194
TM		 1169static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1170{
1171 struct nfs_client *clp = state->owner->so_server->nfs_client;
1172 bool need_recover = false;
1173
1174 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1175 need_recover = true;
1176 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1177 need_recover = true;
1178 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1179 need_recover = true;
1180 if (need_recover)
1181 nfs4_state_mark_reclaim_nograce(clp, state);
1182}
1183
e999e80e
TM		 1184static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1185 nfs4_stateid *stateid)
1186{
1187 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1188 return true;
4f14c194
TM		 1189 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1190 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1191 return true;
4f14c194 1192 }
e999e80e
TM		 1193 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1194 return true;
1195 return false;
1196}
1197
f95549cf
TM		 1198static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1199{
1200 if (state->n_wronly)
1201 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1202 if (state->n_rdonly)
1203 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1204 if (state->n_rdwr)
1205 set_bit(NFS_O_RDWR_STATE, &state->flags);
1206}
1207
226056c5
TM		 1208static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1209 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1210{
226056c5
TM		 1211 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1212 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1213 case FMODE_WRITE:
1214 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1215 break;
1216 case FMODE_READ:
1217 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1218 break;
1219 case 0:
1220 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1221 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1222 clear_bit(NFS_OPEN_STATE, &state->flags);
1223 }
1224 if (stateid == NULL)
1225 return;
f95549cf
TM		 1226 /* Handle races with OPEN */
1227 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1228 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1229 nfs_resync_open_stateid_locked(state);
226056c5 1230 return;
f95549cf 1231 }
003707c7 1232 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1233 nfs4_stateid_copy(&state->stateid, stateid);
1234 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1235}
1236
1237static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1238{
1239 write_seqlock(&state->seqlock);
1240 nfs_clear_open_stateid_locked(state, stateid, fmode);
1241 write_sequnlock(&state->seqlock);
4f14c194
TM		 1242 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1243 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1244}
1245
dc0b027d 1246static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1247{
dc0b027d 1248 switch (fmode) {
003707c7
TM		 1249 case FMODE_READ:
1250 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1251 break;
1252 case FMODE_WRITE:
1253 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1254 break;
1255 case FMODE_READ|FMODE_WRITE:
1256 set_bit(NFS_O_RDWR_STATE, &state->flags);
1257 }
e999e80e
TM		 1258 if (!nfs_need_update_open_stateid(state, stateid))
1259 return;
1260 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1261 nfs4_stateid_copy(&state->stateid, stateid);
1262 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1263}
1264
dc0b027d 1265static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1266{
8bda4e4c
TM		 1267 /*
1268 * Protect the call to nfs4_state_set_mode_locked and
1269 * serialise the stateid update
1270 */
1271 write_seqlock(&state->seqlock);
003707c7 1272 if (deleg_stateid != NULL) {
f597c537 1273 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1274 set_bit(NFS_DELEGATED_STATE, &state->flags);
1275 }
1276 if (open_stateid != NULL)
dc0b027d 1277 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1278 write_sequnlock(&state->seqlock);
1279 spin_lock(&state->owner->so_lock);
dc0b027d 1280 update_open_stateflags(state, fmode);
ec073428 1281 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1282}
1283
dc0b027d 1284static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1285{
1286 struct nfs_inode *nfsi = NFS_I(state->inode);
1287 struct nfs_delegation *deleg_cur;
1288 int ret = 0;
1289
dc0b027d 1290 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1291
1292 rcu_read_lock();
1293 deleg_cur = rcu_dereference(nfsi->delegation);
1294 if (deleg_cur == NULL)
1295 goto no_delegation;
1296
1297 spin_lock(&deleg_cur->lock);
17f26b12 1298 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1299 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1300 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1301 goto no_delegation_unlock;
1302
1303 if (delegation == NULL)
1304 delegation = &deleg_cur->stateid;
f597c537 1305 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1306 goto no_delegation_unlock;
1307
b7391f44 1308 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1309 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1310 ret = 1;
1311no_delegation_unlock:
1312 spin_unlock(&deleg_cur->lock);
1313no_delegation:
1314 rcu_read_unlock();
1315
1316 if (!ret && open_stateid != NULL) {
dc0b027d 1317 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1318 ret = 1;
1319 }
4f14c194
TM		 1320 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1321 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1322
1323 return ret;
1324}
1325
39071e6f
TM		 1326static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1327 const nfs4_stateid *stateid)
1328{
1329 struct nfs4_state *state = lsp->ls_state;
1330 bool ret = false;
1331
1332 spin_lock(&state->state_lock);
1333 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1334 goto out_noupdate;
1335 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1336 goto out_noupdate;
1337 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1338 ret = true;
1339out_noupdate:
1340 spin_unlock(&state->state_lock);
1341 return ret;
1342}
34310430 1343
dc0b027d 1344static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1345{
1346 struct nfs_delegation *delegation;
1347
1348 rcu_read_lock();
1349 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1350 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1351 rcu_read_unlock();
1352 return;
1353 }
1354 rcu_read_unlock();
57ec14c5 1355 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1356}
1357
6ee41268 1358static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1359{
1360 struct nfs4_state *state = opendata->state;
1361 struct nfs_inode *nfsi = NFS_I(state->inode);
1362 struct nfs_delegation *delegation;
f448badd 1363 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1364 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1365 nfs4_stateid stateid;
1366 int ret = -EAGAIN;
1367
aac00a8d 1368 for (;;) {
61beef75 1369 spin_lock(&state->owner->so_lock);
dc0b027d 1370 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1371 update_open_stateflags(state, fmode);
6ee41268 1372 spin_unlock(&state->owner->so_lock);
61beef75 1373 goto out_return_state;
6ee41268 1374 }
61beef75 1375 spin_unlock(&state->owner->so_lock);
34310430
TM		 1376 rcu_read_lock();
1377 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1378 if (!can_open_delegated(delegation, fmode)) {
34310430 1379 rcu_read_unlock();
aac00a8d 1380 break;
34310430 1381 }
aac00a8d 1382 /* Save the delegation */
f597c537 1383 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1384 rcu_read_unlock();
fa332941 1385 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1386 if (!opendata->is_recover) {
1387 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1388 if (ret != 0)
1389 goto out;
1390 }
aac00a8d 1391 ret = -EAGAIN;
34310430
TM		 1392
1393 /* Try to update the stateid using the delegation */
dc0b027d 1394 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1395 goto out_return_state;
aac00a8d 1396 }
aac00a8d
TM		 1397out:
1398 return ERR_PTR(ret);
1399out_return_state:
1400 atomic_inc(&state->count);
1401 return state;
1402}
1403
e23008ec
AA		 1404static void
1405nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1406{
1407 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1408 struct nfs_delegation *delegation;
1409 int delegation_flags = 0;
1410
1411 rcu_read_lock();
1412 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1413 if (delegation)
1414 delegation_flags = delegation->flags;
1415 rcu_read_unlock();
1416 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1417 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1418 "returning a delegation for "
1419 "OPEN(CLAIM_DELEGATE_CUR)\n",
1420 clp->cl_hostname);
1421 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1422 nfs_inode_set_delegation(state->inode,
1423 data->owner->so_cred,
1424 &data->o_res);
1425 else
1426 nfs_inode_reclaim_delegation(state->inode,
1427 data->owner->so_cred,
1428 &data->o_res);
1429}
1430
1431/*
1432 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1433 * and update the nfs4_state.
1434 */
1435static struct nfs4_state *
1436_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1437{
1438 struct inode *inode = data->state->inode;
1439 struct nfs4_state *state = data->state;
1440 int ret;
1441
d2bfda2e
WAA		 1442 if (!data->rpc_done) {
1443 if (data->rpc_status) {
1444 ret = data->rpc_status;
1445 goto err;
1446 }
1447 /* cached opens have already been processed */
1448 goto update;
e23008ec
AA		 1449 }
1450
e23008ec
AA		 1451 ret = nfs_refresh_inode(inode, &data->f_attr);
1452 if (ret)
1453 goto err;
1454
1455 if (data->o_res.delegation_type != 0)
1456 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1457update:
e23008ec
AA		 1458 update_open_stateid(state, &data->o_res.stateid, NULL,
1459 data->o_arg.fmode);
d49f042a 1460 atomic_inc(&state->count);
e23008ec
AA		 1461
1462 return state;
1463err:
1464 return ERR_PTR(ret);
1465
1466}
1467
1468static struct nfs4_state *
1469_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1470{
1471 struct inode *inode;
1472 struct nfs4_state *state = NULL;
1b370bc2 1473 int ret;
24ac23ab 1474
aac00a8d 1475 if (!data->rpc_done) {
6ee41268 1476 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1477 goto out;
1478 }
1479
1b370bc2 1480 ret = -EAGAIN;
24ac23ab 1481 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1482 goto err;
1775fd3e 1483 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1484 ret = PTR_ERR(inode);
03f28e3a 1485 if (IS_ERR(inode))
1b370bc2
TM		 1486 goto err;
1487 ret = -ENOMEM;
24ac23ab
TM		 1488 state = nfs4_get_open_state(inode, data->owner);
1489 if (state == NULL)
1b370bc2 1490 goto err_put_inode;
e23008ec
AA		 1491 if (data->o_res.delegation_type != 0)
1492 nfs4_opendata_check_deleg(data, state);
34310430 1493 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1494 data->o_arg.fmode);
24ac23ab 1495 iput(inode);
aac00a8d 1496out:
7aa262b5 1497 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1498 return state;
1b370bc2
TM		 1499err_put_inode:
1500 iput(inode);
1501err:
1502 return ERR_PTR(ret);
24ac23ab
TM		 1503}
1504
e23008ec
AA		 1505static struct nfs4_state *
1506nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1507{
1508 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1509 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1510 return _nfs4_opendata_to_nfs4_state(data);
1511}
1512
864472e9
TM		 1513static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1514{
1515 struct nfs_inode *nfsi = NFS_I(state->inode);
1516 struct nfs_open_context *ctx;
1517
1518 spin_lock(&state->inode->i_lock);
1519 list_for_each_entry(ctx, &nfsi->open_files, list) {
1520 if (ctx->state != state)
1521 continue;
1522 get_nfs_open_context(ctx);
1523 spin_unlock(&state->inode->i_lock);
1524 return ctx;
1525 }
1526 spin_unlock(&state->inode->i_lock);
1527 return ERR_PTR(-ENOENT);
1528}
1529
4a1c0893
TM		 1530static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1531 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1532{
1533 struct nfs4_opendata *opendata;
1534
4a1c0893 1535 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1536 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1537 if (opendata == NULL)
1538 return ERR_PTR(-ENOMEM);
1539 opendata->state = state;
1540 atomic_inc(&state->count);
1541 return opendata;
1542}
1543
dc0b027d 1544static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1545{
2ced46c2 1546 struct nfs4_state *newstate;
864472e9
TM		 1547 int ret;
1548
39f897fd
N		 1549 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1550 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1551 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1552 /* This mode can't have been delegated, so we must have
1553 * a valid open_stateid to cover it - not need to reclaim.
1554 */
1555 return 0;
dc0b027d
TM		 1556 opendata->o_arg.open_flags = 0;
1557 opendata->o_arg.fmode = fmode;
be36e185
TM		 1558 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1559 NFS_SB(opendata->dentry->d_sb),
1560 fmode, 0);
2ced46c2
TM		 1561 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1562 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1563 nfs4_init_opendata_res(opendata);
b257957e 1564 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1565 if (ret != 0)
1566 return ret;
2ced46c2 1567 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1568 if (IS_ERR(newstate))
1569 return PTR_ERR(newstate);
643168c2 1570 nfs4_close_state(newstate, fmode);
2ced46c2 1571 *res = newstate;
864472e9
TM		 1572 return 0;
1573}
1574
1575static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1576{
864472e9 1577 struct nfs4_state *newstate;
864472e9
TM		 1578 int ret;
1579
4f14c194
TM		 1580 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1581 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1582 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1583 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1584 /* memory barrier prior to reading state->n_* */
2ced46c2 1585 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1586 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1587 smp_rmb();
1588 if (state->n_rdwr != 0) {
2ced46c2 1589 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1590 if (ret != 0)
1591 return ret;
2ced46c2
TM		 1592 if (newstate != state)
1593 return -ESTALE;
864472e9
TM		 1594 }
1595 if (state->n_wronly != 0) {
2ced46c2 1596 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1597 if (ret != 0)
1598 return ret;
2ced46c2
TM		 1599 if (newstate != state)
1600 return -ESTALE;
864472e9
TM		 1601 }
1602 if (state->n_rdonly != 0) {
2ced46c2 1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1604 if (ret != 0)
1605 return ret;
2ced46c2
TM		 1606 if (newstate != state)
1607 return -ESTALE;
864472e9 1608 }
1ac7e2fd
TM		 1609 /*
1610 * We may have performed cached opens for all three recoveries.
1611 * Check if we need to update the current stateid.
1612 */
1613 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1614 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1615 write_seqlock(&state->seqlock);
1ac7e2fd 1616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1617 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1618 write_sequnlock(&state->seqlock);
1ac7e2fd 1619 }
864472e9
TM		 1620 return 0;
1621}
1622
1da177e4
LT		 1623/*
1624 * OPEN_RECLAIM:
1625 * reclaim state on the server after a reboot.
1da177e4 1626 */
539cd03a 1627static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1628{
1ac7e2fd 1629 struct nfs_delegation *delegation;
864472e9 1630 struct nfs4_opendata *opendata;
dc0b027d 1631 fmode_t delegation_type = 0;
1da177e4
LT		 1632 int status;
1633
4a1c0893
TM		 1634 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1635 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1636 if (IS_ERR(opendata))
1637 return PTR_ERR(opendata);
1ac7e2fd
TM		 1638 rcu_read_lock();
1639 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1640 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1641 delegation_type = delegation->type;
1ac7e2fd 1642 rcu_read_unlock();
864472e9
TM		 1643 opendata->o_arg.u.delegation_type = delegation_type;
1644 status = nfs4_open_recover(opendata, state);
c6d00e63 1645 nfs4_opendata_put(opendata);
1da177e4
LT		 1646 return status;
1647}
1648
539cd03a 1649static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1650{
1651 struct nfs_server *server = NFS_SERVER(state->inode);
1652 struct nfs4_exception exception = { };
1653 int err;
1654 do {
539cd03a 1655 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1656 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1657 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1658 continue;
168667c4 1659 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1660 break;
1661 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1662 } while (exception.retry);
1663 return err;
1664}
1665
864472e9
TM		 1666static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1667{
1668 struct nfs_open_context *ctx;
1669 int ret;
1670
1671 ctx = nfs4_state_find_open_context(state);
1672 if (IS_ERR(ctx))
91876b13 1673 return -EAGAIN;
539cd03a 1674 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1675 put_nfs_open_context(ctx);
1676 return ret;
1677}
1678
db4f2e63 1679static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1680{
be76b5b6
TM		 1681 switch (err) {
1682 default:
1683 printk(KERN_ERR "NFS: %s: unhandled error "
1684 "%d.\n", __func__, err);
1685 case 0:
1686 case -ENOENT:
8eee52af 1687 case -EAGAIN:
be76b5b6
TM		 1688 case -ESTALE:
1689 break;
1690 case -NFS4ERR_BADSESSION:
1691 case -NFS4ERR_BADSLOT:
1692 case -NFS4ERR_BAD_HIGH_SLOT:
1693 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1694 case -NFS4ERR_DEADSESSION:
1695 set_bit(NFS_DELEGATED_STATE, &state->flags);
1696 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1697 return -EAGAIN;
1698 case -NFS4ERR_STALE_CLIENTID:
1699 case -NFS4ERR_STALE_STATEID:
1700 set_bit(NFS_DELEGATED_STATE, &state->flags);
1701 case -NFS4ERR_EXPIRED:
1702 /* Don't recall a delegation if it was lost */
1703 nfs4_schedule_lease_recovery(server->nfs_client);
1704 return -EAGAIN;
352297b9
CL		 1705 case -NFS4ERR_MOVED:
1706 nfs4_schedule_migration_recovery(server);
1707 return -EAGAIN;
8ef2f8d4
CL		 1708 case -NFS4ERR_LEASE_MOVED:
1709 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1710 return -EAGAIN;
be76b5b6
TM		 1711 case -NFS4ERR_DELEG_REVOKED:
1712 case -NFS4ERR_ADMIN_REVOKED:
1713 case -NFS4ERR_BAD_STATEID:
db4f2e63 1714 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1715 nfs_inode_find_state_and_recover(state->inode,
1716 stateid);
1717 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1718 return -EAGAIN;
be76b5b6
TM		 1719 case -NFS4ERR_DELAY:
1720 case -NFS4ERR_GRACE:
1721 set_bit(NFS_DELEGATED_STATE, &state->flags);
1722 ssleep(1);
1723 return -EAGAIN;
db4f2e63
TM		 1724 case -ENOMEM:
1725 case -NFS4ERR_DENIED:
1726 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1727 return 0;
be76b5b6 1728 }
1da177e4
LT		 1729 return err;
1730}
1731
db4f2e63
TM		 1732int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1733{
1734 struct nfs_server *server = NFS_SERVER(state->inode);
1735 struct nfs4_opendata *opendata;
1736 int err;
1737
1738 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1739 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1740 if (IS_ERR(opendata))
1741 return PTR_ERR(opendata);
1742 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1743 err = nfs4_open_recover(opendata, state);
1744 nfs4_opendata_put(opendata);
1745 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1746}
1747
be05c860
CL		 1748static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1749{
1750 struct nfs4_opendata *data = calldata;
1751
cb04ad2a
PT		 1752 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1753 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1754}
1755
cdd4e68b
TM		 1756static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1757{
1758 struct nfs4_opendata *data = calldata;
1759
17ead6c8 1760 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1761
cdd4e68b 1762 data->rpc_status = task->tk_status;
26e976a8 1763 if (data->rpc_status == 0) {
f597c537 1764 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1765 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1766 renew_lease(data->o_res.server, data->timestamp);
3e309914 1767 data->rpc_done = 1;
26e976a8 1768 }
cdd4e68b
TM		 1769}
1770
1771static void nfs4_open_confirm_release(void *calldata)
1772{
1773 struct nfs4_opendata *data = calldata;
1774 struct nfs4_state *state = NULL;
1775
1776 /* If this request hasn't been cancelled, do nothing */
1777 if (data->cancelled == 0)
1778 goto out_free;
1779 /* In case of error, no cleanup! */
3e309914 1780 if (!data->rpc_done)
cdd4e68b 1781 goto out_free;
cdd4e68b 1782 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1783 if (!IS_ERR(state))
643168c2 1784 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1785out_free:
c6d00e63 1786 nfs4_opendata_put(data);
cdd4e68b
TM		 1787}
1788
1789static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1790 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1791 .rpc_call_done = nfs4_open_confirm_done,
1792 .rpc_release = nfs4_open_confirm_release,
1793};
1794
1795/*
1796 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1797 */
1798static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1799{
2b0143b5 1800 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1801 struct rpc_task *task;
5138fde0
TM		 1802 struct rpc_message msg = {
1803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1804 .rpc_argp = &data->c_arg,
1805 .rpc_resp = &data->c_res,
1806 .rpc_cred = data->owner->so_cred,
1807 };
c970aa85
TM		 1808 struct rpc_task_setup task_setup_data = {
1809 .rpc_client = server->client,
5138fde0 1810 .rpc_message = &msg,
c970aa85
TM		 1811 .callback_ops = &nfs4_open_confirm_ops,
1812 .callback_data = data,
101070ca 1813 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1814 .flags = RPC_TASK_ASYNC,
1815 };
1da177e4
LT		 1816 int status;
1817
17ead6c8 1818 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1819 kref_get(&data->kref);
3e309914
TM		 1820 data->rpc_done = 0;
1821 data->rpc_status = 0;
5138fde0 1822 data->timestamp = jiffies;
c970aa85 1823 task = rpc_run_task(&task_setup_data);
7a1218a2 1824 if (IS_ERR(task))
cdd4e68b 1825 return PTR_ERR(task);
cdd4e68b
TM		 1826 status = nfs4_wait_for_completion_rpc_task(task);
1827 if (status != 0) {
1828 data->cancelled = 1;
1829 smp_wmb();
1830 } else
1831 status = data->rpc_status;
e6b3c4db 1832 rpc_put_task(task);
1da177e4
LT		 1833 return status;
1834}
1835
24ac23ab 1836static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1837{
24ac23ab
TM		 1838 struct nfs4_opendata *data = calldata;
1839 struct nfs4_state_owner *sp = data->owner;
549b19cc 1840 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1841
24ac23ab 1842 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1843 goto out_wait;
aac00a8d
TM		 1844 /*
1845 * Check if we still need to send an OPEN call, or if we can use
1846 * a delegation instead.
1847 */
1848 if (data->state != NULL) {
1849 struct nfs_delegation *delegation;
1850
dc0b027d 1851 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1852 goto out_no_action;
aac00a8d
TM		 1853 rcu_read_lock();
1854 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1855 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1856 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1857 can_open_delegated(delegation, data->o_arg.fmode))
1858 goto unlock_no_action;
aac00a8d
TM		 1859 rcu_read_unlock();
1860 }
95b72eb0 1861 /* Update client id. */
549b19cc 1862 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1863 switch (data->o_arg.claim) {
1864 case NFS4_OPEN_CLAIM_PREVIOUS:
1865 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1866 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1867 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1868 case NFS4_OPEN_CLAIM_FH:
1869 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1870 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1871 }
26e976a8 1872 data->timestamp = jiffies;
035168ab 1873 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1874 &data->o_arg.seq_args,
2240a9e2
TM		 1875 &data->o_res.seq_res,
1876 task) != 0)
1877 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1878
1879 /* Set the create mode (note dependency on the session type) */
1880 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1881 if (data->o_arg.open_flags & O_EXCL) {
1882 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1883 if (nfs4_has_persistent_session(clp))
1884 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1885 else if (clp->cl_mvops->minor_version > 0)
1886 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1887 }
6ee41268 1888 return;
652f89f6
TM		 1889unlock_no_action:
1890 rcu_read_unlock();
6ee41268
TM		 1891out_no_action:
1892 task->tk_action = NULL;
c8da19b9 1893out_wait:
b75ad4cd 1894 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1895}
1896
24ac23ab
TM		 1897static void nfs4_open_done(struct rpc_task *task, void *calldata)
1898{
1899 struct nfs4_opendata *data = calldata;
1da177e4 1900
24ac23ab 1901 data->rpc_status = task->tk_status;
d898528c 1902
14516c3a
TM		 1903 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1904 return;
d898528c 1905
24ac23ab 1906 if (task->tk_status == 0) {
807d66d8
TM		 1907 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1908 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1909 case S_IFREG:
1910 break;
1911 case S_IFLNK:
24ac23ab 1912 data->rpc_status = -ELOOP;
6f926b5b
TM		 1913 break;
1914 case S_IFDIR:
24ac23ab 1915 data->rpc_status = -EISDIR;
6f926b5b
TM		 1916 break;
1917 default:
24ac23ab 1918 data->rpc_status = -ENOTDIR;
807d66d8 1919 }
6f926b5b 1920 }
26e976a8 1921 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1922 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1923 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1924 }
3e309914 1925 data->rpc_done = 1;
24ac23ab 1926}
6f926b5b 1927
24ac23ab
TM		 1928static void nfs4_open_release(void *calldata)
1929{
1930 struct nfs4_opendata *data = calldata;
1931 struct nfs4_state *state = NULL;
1932
1933 /* If this request hasn't been cancelled, do nothing */
1934 if (data->cancelled == 0)
1935 goto out_free;
1936 /* In case of error, no cleanup! */
3e309914 1937 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1938 goto out_free;
1939 /* In case we need an open_confirm, no cleanup! */
1940 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1941 goto out_free;
24ac23ab 1942 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1943 if (!IS_ERR(state))
643168c2 1944 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1945out_free:
c6d00e63 1946 nfs4_opendata_put(data);
24ac23ab
TM		 1947}
1948
1949static const struct rpc_call_ops nfs4_open_ops = {
1950 .rpc_call_prepare = nfs4_open_prepare,
1951 .rpc_call_done = nfs4_open_done,
1952 .rpc_release = nfs4_open_release,
1953};
1954
b257957e 1955static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1956{
2b0143b5 1957 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1958 struct nfs_server *server = NFS_SERVER(dir);
1959 struct nfs_openargs *o_arg = &data->o_arg;
1960 struct nfs_openres *o_res = &data->o_res;
1961 struct rpc_task *task;
5138fde0
TM		 1962 struct rpc_message msg = {
1963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1964 .rpc_argp = o_arg,
1965 .rpc_resp = o_res,
1966 .rpc_cred = data->owner->so_cred,
1967 };
c970aa85
TM		 1968 struct rpc_task_setup task_setup_data = {
1969 .rpc_client = server->client,
5138fde0 1970 .rpc_message = &msg,
c970aa85
TM		 1971 .callback_ops = &nfs4_open_ops,
1972 .callback_data = data,
101070ca 1973 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1974 .flags = RPC_TASK_ASYNC,
1975 };
24ac23ab
TM		 1976 int status;
1977
a9c92d6b 1978 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1979 kref_get(&data->kref);
3e309914
TM		 1980 data->rpc_done = 0;
1981 data->rpc_status = 0;
2ced46c2 1982 data->cancelled = 0;
bdeca1b7
TM		 1983 data->is_recover = 0;
1984 if (isrecover) {
8fe72bac 1985 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1986 data->is_recover = 1;
1987 }
c970aa85 1988 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1989 if (IS_ERR(task))
1990 return PTR_ERR(task);
1991 status = nfs4_wait_for_completion_rpc_task(task);
1992 if (status != 0) {
1993 data->cancelled = 1;
1994 smp_wmb();
1995 } else
1996 status = data->rpc_status;
1997 rpc_put_task(task);
1998
1999 return status;
2000}
2001
2002static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2003{
2b0143b5 2004 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2005 struct nfs_openres *o_res = &data->o_res;
2006 int status;
2007
2008 status = nfs4_run_open_task(data, 1);
2009 if (status != 0 || !data->rpc_done)
2010 return status;
2011
6926afd1
TM		 2012 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2013
b257957e
AB		 2014 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2015 status = _nfs4_proc_open_confirm(data);
2016 if (status != 0)
2017 return status;
2018 }
2019
2020 return status;
2021}
2022
f3792d63
TM		 2023/*
2024 * Additional permission checks in order to distinguish between an
2025 * open for read, and an open for execute. This works around the
2026 * fact that NFSv4 OPEN treats read and execute permissions as being
2027 * the same.
2028 * Note that in the non-execute case, we want to turn off permission
2029 * checking if we just created a new file (POSIX open() semantics).
2030 */
6168f62c
WAA		 2031static int nfs4_opendata_access(struct rpc_cred *cred,
2032 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2033 struct nfs4_state *state, fmode_t fmode,
2034 int openflags)
6168f62c
WAA		 2035{
2036 struct nfs_access_entry cache;
2037 u32 mask;
2038
2039 /* access call failed or for some reason the server doesn't
2040 * support any access modes -- defer access call until later */
2041 if (opendata->o_res.access_supported == 0)
2042 return 0;
2043
2044 mask = 0;
f3792d63
TM		 2045 /*
2046 * Use openflags to check for exec, because fmode won't
2047 * always have FMODE_EXEC set when file open for exec.
2048 */
f8d9a897
WAA		 2049 if (openflags & __FMODE_EXEC) {
2050 /* ONLY check for exec rights */
2051 mask = MAY_EXEC;
f3792d63 2052 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2053 mask = MAY_READ;
6168f62c
WAA		 2054
2055 cache.cred = cred;
2056 cache.jiffies = jiffies;
2057 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2058 nfs_access_add_cache(state->inode, &cache);
2059
bbd3a8ee 2060 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2061 return 0;
2062
2063 /* even though OPEN succeeded, access is denied. Close the file */
2064 nfs4_close_state(state, fmode);
998f40b5 2065 return -EACCES;
6168f62c
WAA		 2066}
2067
b257957e
AB		 2068/*
2069 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2070 */
2071static int _nfs4_proc_open(struct nfs4_opendata *data)
2072{
2b0143b5 2073 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2074 struct nfs_server *server = NFS_SERVER(dir);
2075 struct nfs_openargs *o_arg = &data->o_arg;
2076 struct nfs_openres *o_res = &data->o_res;
2077 int status;
2078
2079 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2080 if (!data->rpc_done)
2081 return status;
2082 if (status != 0) {
2083 if (status == -NFS4ERR_BADNAME &&
2084 !(o_arg->open_flags & O_CREAT))
2085 return -ENOENT;
24ac23ab 2086 return status;
08ef7bd3 2087 }
24ac23ab 2088
6926afd1
TM		 2089 nfs_fattr_map_and_free_names(server, &data->f_attr);
2090
5bc2afc2 2091 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2092 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2093 if (o_arg->open_flags & O_EXCL)
2094 data->file_created = 1;
2095 else if (o_res->cinfo.before != o_res->cinfo.after)
2096 data->file_created = 1;
2097 }
0df5dd4a
TM		 2098 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2099 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2100 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2101 status = _nfs4_proc_open_confirm(data);
1da177e4 2102 if (status != 0)
24ac23ab 2103 return status;
1da177e4
LT		 2104 }
2105 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2106 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2107 return 0;
1da177e4
LT		 2108}
2109
d83217c1
AA		 2110static int nfs4_recover_expired_lease(struct nfs_server *server)
2111{
2112 return nfs4_client_recover_expired_lease(server->nfs_client);
2113}
2114
1da177e4
LT		 2115/*
2116 * OPEN_EXPIRED:
2117 * reclaim state on the server after a network partition.
2118 * Assumes caller holds the appropriate lock
2119 */
539cd03a 2120static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2121{
e56e0b78 2122 struct nfs4_opendata *opendata;
864472e9 2123 int ret;
1da177e4 2124
4a1c0893 2125 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2126 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2127 if (IS_ERR(opendata))
2128 return PTR_ERR(opendata);
864472e9 2129 ret = nfs4_open_recover(opendata, state);
35d05778 2130 if (ret == -ESTALE)
3d4ff43d 2131 d_drop(ctx->dentry);
c6d00e63 2132 nfs4_opendata_put(opendata);
864472e9 2133 return ret;
1da177e4
LT		 2134}
2135
a9ed2e25 2136static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2137{
539cd03a 2138 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2139 struct nfs4_exception exception = { };
2140 int err;
2141
2142 do {
539cd03a 2143 err = _nfs4_open_expired(ctx, state);
42113a75 2144 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2145 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2146 continue;
a9ed2e25
TM		 2147 switch (err) {
2148 default:
2149 goto out;
2150 case -NFS4ERR_GRACE:
2151 case -NFS4ERR_DELAY:
2152 nfs4_handle_exception(server, err, &exception);
2153 err = 0;
2154 }
202b50dc 2155 } while (exception.retry);
a9ed2e25 2156out:
202b50dc
TM		 2157 return err;
2158}
2159
1da177e4
LT		 2160static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2161{
1da177e4 2162 struct nfs_open_context *ctx;
864472e9 2163 int ret;
1da177e4 2164
864472e9
TM		 2165 ctx = nfs4_state_find_open_context(state);
2166 if (IS_ERR(ctx))
91876b13 2167 return -EAGAIN;
539cd03a 2168 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2169 put_nfs_open_context(ctx);
2170 return ret;
1da177e4
LT		 2171}
2172
4dfd4f7a
TM		 2173static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2174{
2175 nfs_remove_bad_delegation(state->inode);
2176 write_seqlock(&state->seqlock);
2177 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2178 write_sequnlock(&state->seqlock);
2179 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2180}
2181
2182static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2183{
2184 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2185 nfs_finish_clear_delegation_stateid(state);
2186}
2187
2188static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2189{
2190 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2191 nfs40_clear_delegation_stateid(state);
2192 return nfs4_open_expired(sp, state);
2193}
2194
f062eb6c 2195#if defined(CONFIG_NFS_V4_1)
0c116cad 2196static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2197{
f062eb6c 2198 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2199 nfs4_stateid stateid;
ab7cb0df 2200 struct nfs_delegation *delegation;
0c116cad
TM		 2201 struct rpc_cred *cred;
2202 int status;
3e60ffdd 2203
ab7cb0df
TM		 2204 /* Get the delegation credential for use by test/free_stateid */
2205 rcu_read_lock();
2206 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2207 if (delegation == NULL) {
ab7cb0df 2208 rcu_read_unlock();
0c116cad
TM		 2209 return;
2210 }
2211
2212 nfs4_stateid_copy(&stateid, &delegation->stateid);
2213 cred = get_rpccred(delegation->cred);
2214 rcu_read_unlock();
2215 status = nfs41_test_stateid(server, &stateid, cred);
2216 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2217
3e60ffdd
CL		 2218 if (status != NFS_OK) {
2219 /* Free the stateid unless the server explicitly
2220 * informs us the stateid is unrecognized. */
2221 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2222 nfs41_free_stateid(server, &stateid, cred);
2223 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2224 }
ab7cb0df 2225
0c116cad 2226 put_rpccred(cred);
3e60ffdd
CL		 2227}
2228
2229/**
2230 * nfs41_check_open_stateid - possibly free an open stateid
2231 *
2232 * @state: NFSv4 state for an inode
2233 *
2234 * Returns NFS_OK if recovery for this stateid is now finished.
2235 * Otherwise a negative NFS4ERR value is returned.
2236 */
2237static int nfs41_check_open_stateid(struct nfs4_state *state)
2238{
2239 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2240 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2241 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2242 int status;
2243
2244 /* If a state reset has been done, test_stateid is unneeded */
2245 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2246 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2247 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2248 return -NFS4ERR_BAD_STATEID;
2249
ab7cb0df 2250 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2251 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2252 if (status != NFS_OK) {
2253 /* Free the stateid unless the server explicitly
2254 * informs us the stateid is unrecognized. */
2255 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2256 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2257
2258 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2259 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2260 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2261 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2262 }
2263 return status;
2264}
2265
2266static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2267{
eb64cf96 2268 int status;
b01dd1d8 2269
0c116cad 2270 nfs41_check_delegation_stateid(state);
3e60ffdd 2271 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2272 if (status != NFS_OK)
2273 status = nfs4_open_expired(sp, state);
2274 return status;
f062eb6c
BS		 2275}
2276#endif
2277
aa53ed54
JL		 2278/*
2279 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2280 * fields corresponding to attributes that were used to store the verifier.
2281 * Make sure we clobber those fields in the later setattr call
2282 */
2283static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2284{
2285 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2286 !(sattr->ia_valid & ATTR_ATIME_SET))
2287 sattr->ia_valid |= ATTR_ATIME;
2288
2289 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2290 !(sattr->ia_valid & ATTR_MTIME_SET))
2291 sattr->ia_valid |= ATTR_MTIME;
2292}
2293
c21443c2
TM		 2294static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2295 fmode_t fmode,
2296 int flags,
3efb9722 2297 struct nfs_open_context *ctx)
c21443c2
TM		 2298{
2299 struct nfs4_state_owner *sp = opendata->owner;
2300 struct nfs_server *server = sp->so_server;
275bb307 2301 struct dentry *dentry;
c21443c2
TM		 2302 struct nfs4_state *state;
2303 unsigned int seq;
2304 int ret;
2305
2306 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2307
2308 ret = _nfs4_proc_open(opendata);
dca78001 2309 if (ret != 0)
c21443c2
TM		 2310 goto out;
2311
2312 state = nfs4_opendata_to_nfs4_state(opendata);
2313 ret = PTR_ERR(state);
2314 if (IS_ERR(state))
2315 goto out;
2316 if (server->caps & NFS_CAP_POSIX_LOCK)
2317 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2318
275bb307 2319 dentry = opendata->dentry;
2b0143b5 2320 if (d_really_is_negative(dentry)) {
275bb307
TM		 2321 /* FIXME: Is this d_drop() ever needed? */
2322 d_drop(dentry);
2323 dentry = d_add_unique(dentry, igrab(state->inode));
2324 if (dentry == NULL) {
2325 dentry = opendata->dentry;
2326 } else if (dentry != ctx->dentry) {
2327 dput(ctx->dentry);
2328 ctx->dentry = dget(dentry);
2329 }
2330 nfs_set_verifier(dentry,
2b0143b5 2331 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2332 }
2333
c21443c2
TM		 2334 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2335 if (ret != 0)
2336 goto out;
2337
3efb9722 2338 ctx->state = state;
2b0143b5 2339 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2340 nfs_inode_attach_open_context(ctx);
2341 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2342 nfs4_schedule_stateid_recovery(server, state);
2343 }
c21443c2
TM		 2344out:
2345 return ret;
2346}
2347
1da177e4 2348/*
24ac23ab 2349 * Returns a referenced nfs4_state
1da177e4 2350 */
82be417a 2351static int _nfs4_do_open(struct inode *dir,
4197a055 2352 struct nfs_open_context *ctx,
82be417a
AA		 2353 int flags,
2354 struct iattr *sattr,
5bc2afc2
TM		 2355 struct nfs4_label *label,
2356 int *opened)
1da177e4
LT		 2357{
2358 struct nfs4_state_owner *sp;
2359 struct nfs4_state *state = NULL;
2360 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2361 struct nfs4_opendata *opendata;
4197a055
TM		 2362 struct dentry *dentry = ctx->dentry;
2363 struct rpc_cred *cred = ctx->cred;
2364 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2365 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2366 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2367 struct nfs4_label *olabel = NULL;
aac00a8d 2368 int status;
1da177e4
LT		 2369
2370 /* Protect against reboot recovery conflicts */
1da177e4 2371 status = -ENOMEM;
d1e284d5
TM		 2372 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2373 if (sp == NULL) {
1da177e4
LT		 2374 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2375 goto out_err;
2376 }
58d9714a
TM		 2377 status = nfs4_recover_expired_lease(server);
2378 if (status != 0)
b4454fe1 2379 goto err_put_state_owner;
2b0143b5
DH		 2380 if (d_really_is_positive(dentry))
2381 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2382 status = -ENOMEM;
2b0143b5 2383 if (d_really_is_positive(dentry))
49f9a0fa 2384 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2385 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2386 label, claim, GFP_KERNEL);
e56e0b78 2387 if (opendata == NULL)
95d35cb4 2388 goto err_put_state_owner;
1da177e4 2389
14c43f76
DQ		 2390 if (label) {
2391 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2392 if (IS_ERR(olabel)) {
2393 status = PTR_ERR(olabel);
2394 goto err_opendata_put;
2395 }
2396 }
2397
e911b815
TM		 2398 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2399 if (!opendata->f_attr.mdsthreshold) {
2400 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2401 if (!opendata->f_attr.mdsthreshold)
2402 goto err_free_label;
2403 }
1549210f 2404 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2405 }
2b0143b5
DH		 2406 if (d_really_is_positive(dentry))
2407 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2408
3efb9722 2409 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2410 if (status != 0)
14c43f76 2411 goto err_free_label;
3efb9722 2412 state = ctx->state;
6168f62c 2413
549b19cc
TM		 2414 if ((opendata->o_arg.open_flags & O_EXCL) &&
2415 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2416 nfs4_exclusive_attrset(opendata, sattr);
2417
2418 nfs_fattr_init(opendata->o_res.f_attr);
2419 status = nfs4_do_setattr(state->inode, cred,
2420 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2421 state, label, olabel);
2422 if (status == 0) {
f044636d
TM		 2423 nfs_setattr_update_inode(state->inode, sattr,
2424 opendata->o_res.f_attr);
aa9c2669 2425 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2426 }
0ab64e0e 2427 }
5bc2afc2
TM		 2428 if (opendata->file_created)
2429 *opened |= FILE_CREATED;
82be417a 2430
e911b815 2431 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2432 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2433 opendata->f_attr.mdsthreshold = NULL;
2434 }
82be417a 2435
14c43f76
DQ		 2436 nfs4_label_free(olabel);
2437
c6d00e63 2438 nfs4_opendata_put(opendata);
1da177e4 2439 nfs4_put_state_owner(sp);
1da177e4 2440 return 0;
14c43f76
DQ		 2441err_free_label:
2442 nfs4_label_free(olabel);
c6d00e63
TM		 2443err_opendata_put:
2444 nfs4_opendata_put(opendata);
e56e0b78
TM		 2445err_put_state_owner:
2446 nfs4_put_state_owner(sp);
1da177e4 2447out_err:
1da177e4
LT		 2448 return status;
2449}
2450
2451
82be417a 2452static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2453 struct nfs_open_context *ctx,
82be417a
AA		 2454 int flags,
2455 struct iattr *sattr,
5bc2afc2
TM		 2456 struct nfs4_label *label,
2457 int *opened)
1da177e4 2458{
49f9a0fa 2459 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2460 struct nfs4_exception exception = { };
2461 struct nfs4_state *res;
2462 int status;
2463
2464 do {
5bc2afc2 2465 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2466 res = ctx->state;
42113a75 2467 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2468 if (status == 0)
2469 break;
2470 /* NOTE: BAD_SEQID means the server and client disagree about the
2471 * book-keeping w.r.t. state-changing operations
2472 * (OPEN/CLOSE/LOCK/LOCKU...)
2473 * It is actually a sign of a bug on the client or on the server.
2474 *
2475 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2476 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2477 * have unhashed the old state_owner for us, and that we can
2478 * therefore safely retry using a new one. We should still warn
2479 * the user though...
2480 */
2481 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2482 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2483 " returned a bad sequence-id error!\n",
2484 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2485 exception.retry = 1;
2486 continue;
2487 }
550f5747
TM		 2488 /*
2489 * BAD_STATEID on OPEN means that the server cancelled our
2490 * state before it received the OPEN_CONFIRM.
2491 * Recover by retrying the request as per the discussion
2492 * on Page 181 of RFC3530.
2493 */
2494 if (status == -NFS4ERR_BAD_STATEID) {
2495 exception.retry = 1;
2496 continue;
2497 }
aac00a8d
TM		 2498 if (status == -EAGAIN) {
2499 /* We must have found a delegation */
2500 exception.retry = 1;
2501 continue;
2502 }
49f9a0fa
TM		 2503 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2504 continue;
2505 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2506 status, &exception));
2507 } while (exception.retry);
2508 return res;
2509}
2510
659bfcd6
TM		 2511static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2512 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2513 struct nfs4_state *state, struct nfs4_label *ilabel,
2514 struct nfs4_label *olabel)
1da177e4 2515{
3e4f6290 2516 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2517 struct nfs_setattrargs arg = {
3e4f6290 2518 .fh = NFS_FH(inode),
1da177e4
LT		 2519 .iap = sattr,
2520 .server = server,
2521 .bitmask = server->attr_bitmask,
1775fd3e 2522 .label = ilabel,
1da177e4
LT		 2523 };
2524 struct nfs_setattrres res = {
2525 .fattr = fattr,
1775fd3e 2526 .label = olabel,
1da177e4
LT		 2527 .server = server,
2528 };
2529 struct rpc_message msg = {
659bfcd6
TM		 2530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2531 .rpc_argp = &arg,
2532 .rpc_resp = &res,
2533 .rpc_cred = cred,
1da177e4 2534 };
26e976a8 2535 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2536 fmode_t fmode;
2537 bool truncate;
65e4308d 2538 int status;
1da177e4 2539
aa9c2669
DQ		 2540 arg.bitmask = nfs4_bitmask(server, ilabel);
2541 if (ilabel)
2542 arg.bitmask = nfs4_bitmask(server, olabel);
2543
0e574af1 2544 nfs_fattr_init(fattr);
1da177e4 2545
ee3ae84e
TM		 2546 /* Servers should only apply open mode checks for file size changes */
2547 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2548 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2549
2550 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2551 /* Use that stateid */
0418dae1 2552 } else if (truncate && state != NULL) {
2a369153
TM		 2553 struct nfs_lockowner lockowner = {
2554 .l_owner = current->files,
2555 .l_pid = current->tgid,
2556 };
0418dae1
TM		 2557 if (!nfs4_valid_open_stateid(state))
2558 return -EBADF;
2559 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2560 &lockowner) == -EIO)
2561 return -EBADF;
08e9eac4 2562 } else
f597c537 2563 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2564
7c513058 2565 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2566 if (status == 0 && state != NULL)
2567 renew_lease(server, timestamp);
65e4308d 2568 return status;
1da177e4
LT		 2569}
2570
659bfcd6
TM		 2571static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2572 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2573 struct nfs4_state *state, struct nfs4_label *ilabel,
2574 struct nfs4_label *olabel)
1da177e4 2575{
3e4f6290 2576 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2577 struct nfs4_exception exception = {
2578 .state = state,
3114ea7a 2579 .inode = inode,
a1d0b5ee 2580 };
1da177e4
LT		 2581 int err;
2582 do {
1775fd3e 2583 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2584 trace_nfs4_setattr(inode, err);
451146be
TM		 2585 switch (err) {
2586 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2587 if (!(sattr->ia_valid & ATTR_SIZE)) {
2588 pr_warn_once("NFSv4: server %s is incorrectly "
2589 "applying open mode checks to "
2590 "a SETATTR that is not "
2591 "changing file size.\n",
2592 server->nfs_client->cl_hostname);
2593 }
451146be
TM		 2594 if (state && !(state->state & FMODE_WRITE)) {
2595 err = -EBADF;
2596 if (sattr->ia_valid & ATTR_OPEN)
2597 err = -EACCES;
2598 goto out;
2599 }
2600 }
2601 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2602 } while (exception.retry);
451146be 2603out:
1da177e4
LT		 2604 return err;
2605}
2606
2607struct nfs4_closedata {
2608 struct inode *inode;
2609 struct nfs4_state *state;
2610 struct nfs_closeargs arg;
2611 struct nfs_closeres res;
516a6af6 2612 struct nfs_fattr fattr;
26e976a8 2613 unsigned long timestamp;
f7e8917a
FI		 2614 bool roc;
2615 u32 roc_barrier;
1da177e4
LT		 2616};
2617
963d8fe5 2618static void nfs4_free_closedata(void *data)
9512135d 2619{
963d8fe5
TM		 2620 struct nfs4_closedata *calldata = data;
2621 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2622 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2623
f7e8917a
FI		 2624 if (calldata->roc)
2625 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2626 nfs4_put_open_state(calldata->state);
2627 nfs_free_seqid(calldata->arg.seqid);
9512135d 2628 nfs4_put_state_owner(sp);
322b2b90 2629 nfs_sb_deactive(sb);
9512135d
TM		 2630 kfree(calldata);
2631}
2632
963d8fe5 2633static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2634{
963d8fe5 2635 struct nfs4_closedata *calldata = data;
1da177e4 2636 struct nfs4_state *state = calldata->state;
1da177e4 2637 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2638 nfs4_stateid *res_stateid = NULL;
1da177e4 2639
a3ca5651 2640 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2641 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2642 return;
42113a75 2643 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2644 /* hmm. we are done with the inode, and in the process of freeing
2645 * the state_owner. we keep this around to process errors
2646 */
1da177e4
LT		 2647 switch (task->tk_status) {
2648 case 0:
412f6c4c
TM		 2649 res_stateid = &calldata->res.stateid;
2650 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2651 pnfs_roc_set_barrier(state->inode,
2652 calldata->roc_barrier);
26e976a8 2653 renew_lease(server, calldata->timestamp);
412f6c4c 2654 break;
69794ad7 2655 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2656 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2657 case -NFS4ERR_OLD_STATEID:
2658 case -NFS4ERR_BAD_STATEID:
1da177e4 2659 case -NFS4ERR_EXPIRED:
566fcec6 2660 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2661 &state->open_stateid)) {
566fcec6
TM		 2662 rpc_restart_call_prepare(task);
2663 goto out_release;
2664 }
dc0b027d 2665 if (calldata->arg.fmode == 0)
9e33bed5 2666 break;
1da177e4 2667 default:
8478eaa1 2668 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2669 rpc_restart_call_prepare(task);
69794ad7
TM		 2670 goto out_release;
2671 }
1da177e4 2672 }
412f6c4c 2673 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2674out_release:
72211dbe 2675 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2676 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2677 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2678}
2679
4ce70ada 2680static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2681{
4ce70ada 2682 struct nfs4_closedata *calldata = data;
9512135d 2683 struct nfs4_state *state = calldata->state;
7fdab069 2684 struct inode *inode = calldata->inode;
aee7af35 2685 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2686 int call_close = 0;
9512135d 2687
a3ca5651 2688 dprintk("%s: begin!\n", __func__);
963d8fe5 2689 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2690 goto out_wait;
003707c7 2691
88069f77 2692 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2693 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2694 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2695 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2696 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2697 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2698 /* Calculate the change in open mode */
cd9288ff 2699 calldata->arg.fmode = 0;
e7616923 2700 if (state->n_rdwr == 0) {
cd9288ff
TM		 2701 if (state->n_rdonly == 0)
2702 call_close |= is_rdonly;
2703 else if (is_rdonly)
2704 calldata->arg.fmode |= FMODE_READ;
2705 if (state->n_wronly == 0)
2706 call_close |= is_wronly;
2707 else if (is_wronly)
2708 calldata->arg.fmode |= FMODE_WRITE;
2709 } else if (is_rdwr)
2710 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2711
2712 if (calldata->arg.fmode == 0)
2713 call_close |= is_rdwr;
2714
5d422301
TM		 2715 if (!nfs4_valid_open_stateid(state))
2716 call_close = 0;
4cecb76f 2717 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2718
2719 if (!call_close) {
963d8fe5 2720 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2721 goto out_no_action;
9512135d 2722 }
88069f77 2723
f7e8917a 2724 if (calldata->arg.fmode == 0) {
88069f77 2725 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2726 if (calldata->roc &&
b9536ad5
AA		 2727 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2728 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2729 goto out_wait;
b9536ad5 2730 }
f7e8917a 2731 }
6ae37339
TM		 2732 calldata->arg.share_access =
2733 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2734 calldata->arg.fmode, 0);
88069f77 2735
516a6af6 2736 nfs_fattr_init(calldata->res.fattr);
26e976a8 2737 calldata->timestamp = jiffies;
7fdab069 2738 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2739 &calldata->arg.seq_args,
2740 &calldata->res.seq_res,
2240a9e2
TM		 2741 task) != 0)
2742 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2743 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2744 return;
2745out_no_action:
2746 task->tk_action = NULL;
2747out_wait:
2748 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2749}
2750
963d8fe5 2751static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2752 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2753 .rpc_call_done = nfs4_close_done,
2754 .rpc_release = nfs4_free_closedata,
2755};
2756
fe08c546
PT		 2757static bool nfs4_roc(struct inode *inode)
2758{
40dd4b7a 2759 if (!nfs_have_layout(inode))
fe08c546 2760 return false;
fe08c546
PT		 2761 return pnfs_roc(inode);
2762}
2763
1da177e4
LT		 2764/*
2765 * It is possible for data to be read/written from a mem-mapped file
2766 * after the sys_close call (which hits the vfs layer as a flush).
2767 * This means that we can't safely call nfsv4 close on a file until
2768 * the inode is cleared. This in turn means that we are not good
2769 * NFSv4 citizens - we do not indicate to the server to update the file's
2770 * share state even when we are done with one of the three share
2771 * stateid's in the inode.
2772 *
2773 * NOTE: Caller must be holding the sp->so_owner semaphore!
2774 */
1f7977c1 2775int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2776{
4a35bd41 2777 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2778 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2779 struct nfs4_closedata *calldata;
b39e625b
TM		 2780 struct nfs4_state_owner *sp = state->owner;
2781 struct rpc_task *task;
5138fde0
TM		 2782 struct rpc_message msg = {
2783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2784 .rpc_cred = state->owner->so_cred,
2785 };
c970aa85
TM		 2786 struct rpc_task_setup task_setup_data = {
2787 .rpc_client = server->client,
5138fde0 2788 .rpc_message = &msg,
c970aa85 2789 .callback_ops = &nfs4_close_ops,
101070ca 2790 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2791 .flags = RPC_TASK_ASYNC,
2792 };
9512135d 2793 int status = -ENOMEM;
1da177e4 2794
fa940720
WAA		 2795 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2796 &task_setup_data.rpc_client, &msg);
2797
8535b2be 2798 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2799 if (calldata == NULL)
9512135d 2800 goto out;
a9c92d6b 2801 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2802 calldata->inode = state->inode;
1da177e4 2803 calldata->state = state;
4a35bd41 2804 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2805 /* Serialization for the sequence id */
63f5f796
TM		 2806 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2807 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2808 if (IS_ERR(calldata->arg.seqid))
9512135d 2809 goto out_free_calldata;
dc0b027d 2810 calldata->arg.fmode = 0;
a65318bf 2811 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2812 calldata->res.fattr = &calldata->fattr;
c1d51931 2813 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2814 calldata->res.server = server;
fe08c546 2815 calldata->roc = nfs4_roc(state->inode);
643168c2 2816 nfs_sb_active(calldata->inode->i_sb);
9512135d 2817
1174dd1f
TM		 2818 msg.rpc_argp = &calldata->arg;
2819 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2820 task_setup_data.callback_data = calldata;
2821 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2822 if (IS_ERR(task))
2823 return PTR_ERR(task);
a49c3c77
TM		 2824 status = 0;
2825 if (wait)
2826 status = rpc_wait_for_completion_task(task);
b39e625b 2827 rpc_put_task(task);
a49c3c77 2828 return status;
9512135d
TM		 2829out_free_calldata:
2830 kfree(calldata);
2831out:
b39e625b
TM		 2832 nfs4_put_open_state(state);
2833 nfs4_put_state_owner(sp);
9512135d 2834 return status;
1da177e4
LT		 2835}
2836
2b484297 2837static struct inode *
5bc2afc2
TM		 2838nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2839 int open_flags, struct iattr *attr, int *opened)
1da177e4 2840{
1da177e4 2841 struct nfs4_state *state;
aa9c2669
DQ		 2842 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2843
2844 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2845
565277f6 2846 /* Protect against concurrent sillydeletes */
5bc2afc2 2847 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2848
2849 nfs4_label_release_security(label);
2850
f46e0bd3
TM		 2851 if (IS_ERR(state))
2852 return ERR_CAST(state);
275bb307 2853 return state->inode;
1da177e4
LT		 2854}
2855
1185a552 2856static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2857{
2858 if (ctx->state == NULL)
2859 return;
2860 if (is_sync)
643168c2 2861 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2862 else
643168c2 2863 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2864}
1da177e4 2865
b944dba3
TM		 2866#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2867#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2868#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2869
1da177e4
LT		 2870static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2871{
43652ad5
BH		 2872 struct nfs4_server_caps_arg args = {
2873 .fhandle = fhandle,
2874 };
1da177e4
LT		 2875 struct nfs4_server_caps_res res = {};
2876 struct rpc_message msg = {
2877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2878 .rpc_argp = &args,
1da177e4
LT		 2879 .rpc_resp = &res,
2880 };
2881 int status;
2882
7c513058 2883 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2884 if (status == 0) {
b944dba3
TM		 2885 /* Sanity check the server answers */
2886 switch (server->nfs_client->cl_minorversion) {
2887 case 0:
2888 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2889 res.attr_bitmask[2] = 0;
2890 break;
2891 case 1:
2892 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2893 break;
2894 case 2:
2895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2896 }
1da177e4 2897 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2898 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2899 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2900 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2901 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2902 NFS_CAP_CTIME|NFS_CAP_MTIME|
2903 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2904 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2905 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2906 server->caps |= NFS_CAP_ACLS;
2907 if (res.has_links != 0)
2908 server->caps |= NFS_CAP_HARDLINKS;
2909 if (res.has_symlinks != 0)
2910 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2911 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2912 server->caps |= NFS_CAP_FILEID;
2913 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2914 server->caps |= NFS_CAP_MODE;
2915 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2916 server->caps |= NFS_CAP_NLINK;
2917 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2918 server->caps |= NFS_CAP_OWNER;
2919 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2920 server->caps |= NFS_CAP_OWNER_GROUP;
2921 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2922 server->caps |= NFS_CAP_ATIME;
2923 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2924 server->caps |= NFS_CAP_CTIME;
2925 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2926 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2927#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2928 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2929 server->caps |= NFS_CAP_SECURITY_LABEL;
2930#endif
2931 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2932 sizeof(server->attr_bitmask));
b944dba3 2933 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2934
a65318bf
TM		 2935 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2936 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2937 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2938 server->cache_consistency_bitmask[2] = 0;
1da177e4 2939 server->acl_bitmask = res.acl_bitmask;
264e6351 2940 server->fh_expire_type = res.fh_expire_type;
1da177e4 2941 }
cccef3b9 2942
1da177e4
LT		 2943 return status;
2944}
2945
55a97593 2946int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2947{
2948 struct nfs4_exception exception = { };
2949 int err;
2950 do {
2951 err = nfs4_handle_exception(server,
2952 _nfs4_server_capabilities(server, fhandle),
2953 &exception);
2954 } while (exception.retry);
2955 return err;
2956}
2957
2958static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2959 struct nfs_fsinfo *info)
2960{
aa9c2669 2961 u32 bitmask[3];
1da177e4 2962 struct nfs4_lookup_root_arg args = {
aa9c2669 2963 .bitmask = bitmask,
1da177e4
LT		 2964 };
2965 struct nfs4_lookup_res res = {
2966 .server = server,
0e574af1 2967 .fattr = info->fattr,
1da177e4
LT		 2968 .fh = fhandle,
2969 };
2970 struct rpc_message msg = {
2971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2972 .rpc_argp = &args,
2973 .rpc_resp = &res,
2974 };
008f55d0 2975
aa9c2669
DQ		 2976 bitmask[0] = nfs4_fattr_bitmap[0];
2977 bitmask[1] = nfs4_fattr_bitmap[1];
2978 /*
2979 * Process the label in the upcoming getfattr
2980 */
2981 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2982
0e574af1 2983 nfs_fattr_init(info->fattr);
7c513058 2984 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2985}
2986
2987static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2988 struct nfs_fsinfo *info)
2989{
2990 struct nfs4_exception exception = { };
2991 int err;
2992 do {
fb8a5ba8 2993 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2994 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2995 switch (err) {
2996 case 0:
2997 case -NFS4ERR_WRONGSEC:
05e9cfb4 2998 goto out;
fb8a5ba8
BS		 2999 default:
3000 err = nfs4_handle_exception(server, err, &exception);
3001 }
1da177e4 3002 } while (exception.retry);
05e9cfb4 3003out:
1da177e4
LT		 3004 return err;
3005}
3006
8f70e95f
BS		 3007static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3008 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3009{
c2190661
TM		 3010 struct rpc_auth_create_args auth_args = {
3011 .pseudoflavor = flavor,
3012 };
8f70e95f
BS		 3013 struct rpc_auth *auth;
3014 int ret;
3015
c2190661 3016 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3017 if (IS_ERR(auth)) {
75bc8821 3018 ret = -EACCES;
8f70e95f
BS		 3019 goto out;
3020 }
3021 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3022out:
3023 return ret;
3024}
3025
9a744ba3
CL		 3026/*
3027 * Retry pseudoroot lookup with various security flavors. We do this when:
3028 *
3029 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3030 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3031 *
3032 * Returns zero on success, or a negative NFS4ERR value, or a
3033 * negative errno value.
3034 */
801a16dc 3035static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3036 struct nfs_fsinfo *info)
1da177e4 3037{
9a744ba3
CL		 3038 /* Per 3530bis 15.33.5 */
3039 static const rpc_authflavor_t flav_array[] = {
3040 RPC_AUTH_GSS_KRB5P,
3041 RPC_AUTH_GSS_KRB5I,
3042 RPC_AUTH_GSS_KRB5,
c4eafe11 3043 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3044 RPC_AUTH_NULL,
3045 };
3046 int status = -EPERM;
3047 size_t i;
6a1a1e34 3048
4d4b69dd
WAA		 3049 if (server->auth_info.flavor_len > 0) {
3050 /* try each flavor specified by user */
3051 for (i = 0; i < server->auth_info.flavor_len; i++) {
3052 status = nfs4_lookup_root_sec(server, fhandle, info,
3053 server->auth_info.flavors[i]);
3054 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3055 continue;
3056 break;
3057 }
3058 } else {
3059 /* no flavors specified by user, try default list */
3060 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3061 status = nfs4_lookup_root_sec(server, fhandle, info,
3062 flav_array[i]);
3063 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3064 continue;
3065 break;
3066 }
8f70e95f 3067 }
9a744ba3 3068
fb8a5ba8
BS		 3069 /*
3070 * -EACCESS could mean that the user doesn't have correct permissions
3071 * to access the mount. It could also mean that we tried to mount
3072 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3073 * existing mount programs don't handle -EACCES very well so it should
3074 * be mapped to -EPERM instead.
3075 */
3076 if (status == -EACCES)
3077 status = -EPERM;
801a16dc
BS		 3078 return status;
3079}
3080
2ed4b95b
CL		 3081static int nfs4_do_find_root_sec(struct nfs_server *server,
3082 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3083{
3084 int mv = server->nfs_client->cl_minorversion;
3085 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3086}
3087
3088/**
3089 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3090 * @server: initialized nfs_server handle
3091 * @fhandle: we fill in the pseudo-fs root file handle
3092 * @info: we fill in an FSINFO struct
5e6b1990 3093 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3094 *
3095 * Returns zero on success, or a negative errno.
801a16dc 3096 */
3028eb2b 3097int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3098 struct nfs_fsinfo *info,
3099 bool auth_probe)
801a16dc 3100{
c7757074 3101 int status = 0;
2ed4b95b 3102
c7757074 3103 if (!auth_probe)
5e6b1990 3104 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3105
3106 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3107 status = nfs4_do_find_root_sec(server, fhandle, info);
3108
1da177e4
LT		 3109 if (status == 0)
3110 status = nfs4_server_capabilities(server, fhandle);
3111 if (status == 0)
3112 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3113
c12e87f4 3114 return nfs4_map_errors(status);
1da177e4
LT		 3115}
3116
bae36241
BS		 3117static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3118 struct nfs_fsinfo *info)
3119{
3120 int error;
3121 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3122 struct nfs4_label *label = NULL;
bae36241
BS		 3123
3124 error = nfs4_server_capabilities(server, mntfh);
3125 if (error < 0) {
3126 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3127 return error;
3128 }
3129
14c43f76
DQ		 3130 label = nfs4_label_alloc(server, GFP_KERNEL);
3131 if (IS_ERR(label))
3132 return PTR_ERR(label);
3133
1775fd3e 3134 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3135 if (error < 0) {
3136 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3137 goto err_free_label;
bae36241
BS		 3138 }
3139
3140 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3141 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3142 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3143
14c43f76
DQ		 3144err_free_label:
3145 nfs4_label_free(label);
3146
bae36241
BS		 3147 return error;
3148}
3149
6b97fd3d
MN		 3150/*
3151 * Get locations and (maybe) other attributes of a referral.
3152 * Note that we'll actually follow the referral later when
3153 * we detect fsid mismatch in inode revalidation
3154 */
f05d147f
BS		 3155static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3156 const struct qstr *name, struct nfs_fattr *fattr,
3157 struct nfs_fh *fhandle)
6b97fd3d
MN		 3158{
3159 int status = -ENOMEM;
3160 struct page *page = NULL;
3161 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3162
3163 page = alloc_page(GFP_KERNEL);
3164 if (page == NULL)
3165 goto out;
3166 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3167 if (locations == NULL)
3168 goto out;
3169
f05d147f 3170 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3171 if (status != 0)
3172 goto out;
519ae255
CL		 3173
3174 /*
3175 * If the fsid didn't change, this is a migration event, not a
3176 * referral. Cause us to drop into the exception handler, which
3177 * will kick off migration recovery.
3178 */
6b97fd3d 3179 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3180 dprintk("%s: server did not return a different fsid for"
3181 " a referral at %s\n", __func__, name->name);
519ae255 3182 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3183 goto out;
3184 }
533eb461
AA		 3185 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3186 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3187
533eb461 3188 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3189 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3190 memset(fhandle, 0, sizeof(struct nfs_fh));
3191out:
3192 if (page)
3193 __free_page(page);
5d7ca35a 3194 kfree(locations);
6b97fd3d
MN		 3195 return status;
3196}
3197
1775fd3e
DQ		 3198static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3199 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3200{
3201 struct nfs4_getattr_arg args = {
3202 .fh = fhandle,
3203 .bitmask = server->attr_bitmask,
3204 };
3205 struct nfs4_getattr_res res = {
3206 .fattr = fattr,
1775fd3e 3207 .label = label,
1da177e4
LT		 3208 .server = server,
3209 };
3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3212 .rpc_argp = &args,
3213 .rpc_resp = &res,
3214 };
aa9c2669
DQ		 3215
3216 args.bitmask = nfs4_bitmask(server, label);
3217
0e574af1 3218 nfs_fattr_init(fattr);
7c513058 3219 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3220}
3221
1775fd3e
DQ		 3222static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3223 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3224{
3225 struct nfs4_exception exception = { };
3226 int err;
3227 do {
b5f875a9
TM		 3228 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3229 trace_nfs4_getattr(server, fhandle, fattr, err);
3230 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3231 &exception);
3232 } while (exception.retry);
3233 return err;
3234}
3235
3236/*
3237 * The file is not closed if it is opened due to the a request to change
3238 * the size of the file. The open call will not be needed once the
3239 * VFS layer lookup-intents are implemented.
3240 *
3241 * Close is called when the inode is destroyed.
3242 * If we haven't opened the file for O_WRONLY, we
3243 * need to in the size_change case to obtain a stateid.
3244 *
3245 * Got race?
3246 * Because OPEN is always done by name in nfsv4, it is
3247 * possible that we opened a different file by the same
3248 * name. We can recognize this race condition, but we
3249 * can't do anything about it besides returning an error.
3250 *
3251 * This will be fixed with VFS changes (lookup-intent).
3252 */
3253static int
3254nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3255 struct iattr *sattr)
3256{
2b0143b5 3257 struct inode *inode = d_inode(dentry);
659bfcd6 3258 struct rpc_cred *cred = NULL;
d530838b 3259 struct nfs4_state *state = NULL;
14c43f76 3260 struct nfs4_label *label = NULL;
1da177e4
LT		 3261 int status;
3262
88ac815c
PT		 3263 if (pnfs_ld_layoutret_on_setattr(inode) &&
3264 sattr->ia_valid & ATTR_SIZE &&
3265 sattr->ia_size < i_size_read(inode))
24028672 3266 pnfs_commit_and_return_layout(inode);
8a1636c4 3267
0e574af1 3268 nfs_fattr_init(fattr);
1da177e4 3269
2669940d
AA		 3270 /* Deal with open(O_TRUNC) */
3271 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3272 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3273
3274 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3275 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3276 return 0;
3277
d530838b 3278 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3279 if (sattr->ia_valid & ATTR_FILE) {
3280 struct nfs_open_context *ctx;
3281
3282 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3283 if (ctx) {
3284 cred = ctx->cred;
3285 state = ctx->state;
3286 }
659bfcd6 3287 }
08e9eac4 3288
14c43f76
DQ		 3289 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3290 if (IS_ERR(label))
3291 return PTR_ERR(label);
3292
3293 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3294 if (status == 0) {
f044636d 3295 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3296 nfs_setsecurity(inode, fattr, label);
3297 }
14c43f76 3298 nfs4_label_free(label);
1da177e4
LT		 3299 return status;
3300}
3301
0c2e53f1
TM		 3302static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3303 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3304 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3305{
0c2e53f1 3306 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3307 int status;
3308 struct nfs4_lookup_arg args = {
3309 .bitmask = server->attr_bitmask,
0c2e53f1 3310 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3311 .name = name,
3312 };
3313 struct nfs4_lookup_res res = {
3314 .server = server,
3315 .fattr = fattr,
aa9c2669 3316 .label = label,
2b3de441
DH		 3317 .fh = fhandle,
3318 };
3319 struct rpc_message msg = {
3320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3321 .rpc_argp = &args,
3322 .rpc_resp = &res,
3323 };
3324
aa9c2669
DQ		 3325 args.bitmask = nfs4_bitmask(server, label);
3326
2b3de441
DH		 3327 nfs_fattr_init(fattr);
3328
1da177e4 3329 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3330 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3331 dprintk("NFS reply lookup: %d\n", status);
3332 return status;
3333}
3334
72de53ec 3335static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3336{
7ebb9315 3337 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3338 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3339 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3340 fattr->nlink = 2;
3341}
3342
72de53ec
BS		 3343static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3344 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3345 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3346{
3347 struct nfs4_exception exception = { };
72de53ec 3348 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3349 int err;
3350 do {
1775fd3e 3351 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3352 trace_nfs4_lookup(dir, name, err);
72de53ec 3353 switch (err) {
08ef7bd3 3354 case -NFS4ERR_BADNAME:
72de53ec
BS		 3355 err = -ENOENT;
3356 goto out;
0c2e53f1 3357 case -NFS4ERR_MOVED:
f05d147f 3358 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3359 if (err == -NFS4ERR_MOVED)
3360 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3361 goto out;
0c2e53f1 3362 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3363 err = -EPERM;
3364 if (client != *clnt)
3365 goto out;
66b06860 3366 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3367 if (IS_ERR(client))
3368 return PTR_ERR(client);
3369
3370 exception.retry = 1;
3371 break;
3372 default:
3373 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3374 }
1da177e4 3375 } while (exception.retry);
72de53ec
BS		 3376
3377out:
3378 if (err == 0)
3379 *clnt = client;
3380 else if (client != *clnt)
3381 rpc_shutdown_client(client);
3382
1da177e4
LT		 3383 return err;
3384}
3385
80a16b21 3386static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3387 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3388 struct nfs4_label *label)
72de53ec
BS		 3389{
3390 int status;
3391 struct rpc_clnt *client = NFS_CLIENT(dir);
3392
1775fd3e 3393 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3394 if (client != NFS_CLIENT(dir)) {
3395 rpc_shutdown_client(client);
3396 nfs_fixup_secinfo_attributes(fattr);
3397 }
3398 return status;
3399}
3400
f05d147f
BS		 3401struct rpc_clnt *
3402nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3403 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3404{
b72888cb 3405 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3406 int status;
f05d147f 3407
1775fd3e 3408 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3409 if (status < 0)
f05d147f 3410 return ERR_PTR(status);
b72888cb 3411 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3412}
3413
1da177e4
LT		 3414static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3415{
76b32999 3416 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3417 struct nfs4_accessargs args = {
3418 .fh = NFS_FH(inode),
a4980e78 3419 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3420 };
3421 struct nfs4_accessres res = {
3422 .server = server,
1da177e4 3423 };
1da177e4
LT		 3424 struct rpc_message msg = {
3425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3426 .rpc_argp = &args,
3427 .rpc_resp = &res,
3428 .rpc_cred = entry->cred,
3429 };
3430 int mode = entry->mask;
aa9c2669 3431 int status = 0;
1da177e4
LT		 3432
3433 /*
3434 * Determine which access bits we want to ask for...
3435 */
3436 if (mode & MAY_READ)
3437 args.access |= NFS4_ACCESS_READ;
3438 if (S_ISDIR(inode->i_mode)) {
3439 if (mode & MAY_WRITE)
3440 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3441 if (mode & MAY_EXEC)
3442 args.access |= NFS4_ACCESS_LOOKUP;
3443 } else {
3444 if (mode & MAY_WRITE)
3445 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3446 if (mode & MAY_EXEC)
3447 args.access |= NFS4_ACCESS_EXECUTE;
3448 }
c407d41a
TM		 3449
3450 res.fattr = nfs_alloc_fattr();
3451 if (res.fattr == NULL)
3452 return -ENOMEM;
3453
7c513058 3454 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3455 if (!status) {
6168f62c 3456 nfs_access_set_mask(entry, res.access);
c407d41a 3457 nfs_refresh_inode(inode, res.fattr);
1da177e4 3458 }
c407d41a 3459 nfs_free_fattr(res.fattr);
1da177e4
LT		 3460 return status;
3461}
3462
3463static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3464{
3465 struct nfs4_exception exception = { };
3466 int err;
3467 do {
c1578b76
TM		 3468 err = _nfs4_proc_access(inode, entry);
3469 trace_nfs4_access(inode, err);
3470 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3471 &exception);
3472 } while (exception.retry);
3473 return err;
3474}
3475
3476/*
3477 * TODO: For the time being, we don't try to get any attributes
3478 * along with any of the zero-copy operations READ, READDIR,
3479 * READLINK, WRITE.
3480 *
3481 * In the case of the first three, we want to put the GETATTR
3482 * after the read-type operation -- this is because it is hard
3483 * to predict the length of a GETATTR response in v4, and thus
3484 * align the READ data correctly. This means that the GETATTR
3485 * may end up partially falling into the page cache, and we should
3486 * shift it into the 'tail' of the xdr_buf before processing.
3487 * To do this efficiently, we need to know the total length
3488 * of data received, which doesn't seem to be available outside
3489 * of the RPC layer.
3490 *
3491 * In the case of WRITE, we also want to put the GETATTR after
3492 * the operation -- in this case because we want to make sure
140150db 3493 * we get the post-operation mtime and size.
1da177e4
LT		 3494 *
3495 * Both of these changes to the XDR layer would in fact be quite
3496 * minor, but I decided to leave them for a subsequent patch.
3497 */
3498static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3499 unsigned int pgbase, unsigned int pglen)
3500{
3501 struct nfs4_readlink args = {
3502 .fh = NFS_FH(inode),
3503 .pgbase = pgbase,
3504 .pglen = pglen,
3505 .pages = &page,
3506 };
f50c7000 3507 struct nfs4_readlink_res res;
1da177e4
LT		 3508 struct rpc_message msg = {
3509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3510 .rpc_argp = &args,
f50c7000 3511 .rpc_resp = &res,
1da177e4
LT		 3512 };
3513
7c513058 3514 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3515}
3516
3517static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3518 unsigned int pgbase, unsigned int pglen)
3519{
3520 struct nfs4_exception exception = { };
3521 int err;
3522 do {
c1578b76
TM		 3523 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3524 trace_nfs4_readlink(inode, err);
3525 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3526 &exception);
3527 } while (exception.retry);
3528 return err;
3529}
3530
1da177e4 3531/*
8867fe58 3532 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3533 */
1da177e4
LT		 3534static int
3535nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3536 int flags)
1da177e4 3537{
aa9c2669 3538 struct nfs4_label l, *ilabel = NULL;
8867fe58 3539 struct nfs_open_context *ctx;
1da177e4 3540 struct nfs4_state *state;
5bc2afc2 3541 int opened = 0;
1da177e4
LT		 3542 int status = 0;
3543
8867fe58
MS		 3544 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3545 if (IS_ERR(ctx))
3546 return PTR_ERR(ctx);
3547
aa9c2669
DQ		 3548 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3549
a8a5da99 3550 sattr->ia_mode &= ~current_umask();
5bc2afc2 3551 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3552 if (IS_ERR(state)) {
3553 status = PTR_ERR(state);
c0204fd2 3554 goto out;
1da177e4 3555 }
1da177e4 3556out:
aa9c2669 3557 nfs4_label_release_security(ilabel);
8867fe58 3558 put_nfs_open_context(ctx);
1da177e4
LT		 3559 return status;
3560}
3561
3562static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3563{
16e42959 3564 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3565 struct nfs_removeargs args = {
1da177e4 3566 .fh = NFS_FH(dir),
26fe5750 3567 .name = *name,
16e42959 3568 };
4fdc17b2 3569 struct nfs_removeres res = {
16e42959 3570 .server = server,
1da177e4 3571 };
1da177e4 3572 struct rpc_message msg = {
4fdc17b2
TM		 3573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3574 .rpc_argp = &args,
3575 .rpc_resp = &res,
1da177e4 3576 };
778d2817 3577 int status;
1da177e4 3578
7c513058 3579 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3580 if (status == 0)
16e42959 3581 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3582 return status;
3583}
3584
3585static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3586{
3587 struct nfs4_exception exception = { };
3588 int err;
3589 do {
078ea3df
TM		 3590 err = _nfs4_proc_remove(dir, name);
3591 trace_nfs4_remove(dir, name, err);
3592 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3593 &exception);
3594 } while (exception.retry);
3595 return err;
3596}
3597
e4eff1a6 3598static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3599{
e4eff1a6
TM		 3600 struct nfs_server *server = NFS_SERVER(dir);
3601 struct nfs_removeargs *args = msg->rpc_argp;
3602 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3603
e4eff1a6 3604 res->server = server;
1da177e4 3605 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3606 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3607
3608 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3609}
3610
34e137cc
BS		 3611static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3612{
d9afbd1b
TM		 3613 nfs4_setup_sequence(NFS_SERVER(data->dir),
3614 &data->args.seq_args,
3615 &data->res.seq_res,
3616 task);
1da177e4
LT		 3617}
3618
e4eff1a6 3619static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3620{
078ea3df
TM		 3621 struct nfs_unlinkdata *data = task->tk_calldata;
3622 struct nfs_removeres *res = &data->res;
e4eff1a6 3623
14516c3a
TM		 3624 if (!nfs4_sequence_done(task, &res->seq_res))
3625 return 0;
8478eaa1
N		 3626 if (nfs4_async_handle_error(task, res->server, NULL,
3627 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3628 return 0;
3629 update_changeattr(dir, &res->cinfo);
e4eff1a6 3630 return 1;
1da177e4
LT		 3631}
3632
d3d4152a
JL		 3633static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3634{
3635 struct nfs_server *server = NFS_SERVER(dir);
3636 struct nfs_renameargs *arg = msg->rpc_argp;
3637 struct nfs_renameres *res = msg->rpc_resp;
3638
3639 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3640 res->server = server;
a9c92d6b 3641 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3642}
3643
c6bfa1a1
BS		 3644static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3645{
d9afbd1b
TM		 3646 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3647 &data->args.seq_args,
3648 &data->res.seq_res,
3649 task);
d3d4152a
JL		 3650}
3651
3652static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3653 struct inode *new_dir)
3654{
fbc6f7c2
TM		 3655 struct nfs_renamedata *data = task->tk_calldata;
3656 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3657
3658 if (!nfs4_sequence_done(task, &res->seq_res))
3659 return 0;
8478eaa1 3660 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3661 return 0;
3662
3663 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3664 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3665 return 1;
3666}
3667
1da177e4
LT		 3668static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3669{
91ba2eee 3670 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3671 struct nfs4_link_arg arg = {
3672 .fh = NFS_FH(inode),
3673 .dir_fh = NFS_FH(dir),
3674 .name = name,
91ba2eee
TM		 3675 .bitmask = server->attr_bitmask,
3676 };
91ba2eee
TM		 3677 struct nfs4_link_res res = {
3678 .server = server,
1775fd3e 3679 .label = NULL,
1da177e4 3680 };
1da177e4
LT		 3681 struct rpc_message msg = {
3682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3683 .rpc_argp = &arg,
91ba2eee 3684 .rpc_resp = &res,
1da177e4 3685 };
136f2627
TM		 3686 int status = -ENOMEM;
3687
3688 res.fattr = nfs_alloc_fattr();
778d2817 3689 if (res.fattr == NULL)
136f2627 3690 goto out;
1da177e4 3691
14c43f76
DQ		 3692 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3693 if (IS_ERR(res.label)) {
3694 status = PTR_ERR(res.label);
3695 goto out;
3696 }
aa9c2669 3697 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3698
7c513058 3699 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3700 if (!status) {
3701 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3702 status = nfs_post_op_update_inode(inode, res.fattr);
3703 if (!status)
3704 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3705 }
14c43f76
DQ		 3706
3707
3708 nfs4_label_free(res.label);
3709
136f2627 3710out:
136f2627 3711 nfs_free_fattr(res.fattr);
1da177e4
LT		 3712 return status;
3713}
3714
3715static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3716{
3717 struct nfs4_exception exception = { };
3718 int err;
3719 do {
3720 err = nfs4_handle_exception(NFS_SERVER(inode),
3721 _nfs4_proc_link(inode, dir, name),
3722 &exception);
3723 } while (exception.retry);
3724 return err;
3725}
3726
57dc9a57
TM		 3727struct nfs4_createdata {
3728 struct rpc_message msg;
3729 struct nfs4_create_arg arg;
3730 struct nfs4_create_res res;
3731 struct nfs_fh fh;
3732 struct nfs_fattr fattr;
1775fd3e 3733 struct nfs4_label *label;
57dc9a57
TM		 3734};
3735
3736static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3737 struct qstr *name, struct iattr *sattr, u32 ftype)
3738{
3739 struct nfs4_createdata *data;
3740
3741 data = kzalloc(sizeof(*data), GFP_KERNEL);
3742 if (data != NULL) {
3743 struct nfs_server *server = NFS_SERVER(dir);
3744
14c43f76
DQ		 3745 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3746 if (IS_ERR(data->label))
3747 goto out_free;
3748
57dc9a57
TM		 3749 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3750 data->msg.rpc_argp = &data->arg;
3751 data->msg.rpc_resp = &data->res;
3752 data->arg.dir_fh = NFS_FH(dir);
3753 data->arg.server = server;
3754 data->arg.name = name;
3755 data->arg.attrs = sattr;
3756 data->arg.ftype = ftype;
aa9c2669 3757 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3758 data->res.server = server;
3759 data->res.fh = &data->fh;
3760 data->res.fattr = &data->fattr;
1775fd3e 3761 data->res.label = data->label;
57dc9a57 3762 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3763 }
3764 return data;
14c43f76
DQ		 3765out_free:
3766 kfree(data);
3767 return NULL;
57dc9a57
TM		 3768}
3769
3770static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3771{
7c513058 3772 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3773 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3774 if (status == 0) {
3775 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3776 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3777 }
3778 return status;
3779}
3780
3781static void nfs4_free_createdata(struct nfs4_createdata *data)
3782{
14c43f76 3783 nfs4_label_free(data->label);
57dc9a57
TM		 3784 kfree(data);
3785}
3786
4f390c15 3787static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3788 struct page *page, unsigned int len, struct iattr *sattr,
3789 struct nfs4_label *label)
1da177e4 3790{
57dc9a57
TM		 3791 struct nfs4_createdata *data;
3792 int status = -ENAMETOOLONG;
1da177e4 3793
94a6d753 3794 if (len > NFS4_MAXPATHLEN)
57dc9a57 3795 goto out;
4f390c15 3796
57dc9a57
TM		 3797 status = -ENOMEM;
3798 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3799 if (data == NULL)
3800 goto out;
3801
3802 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3803 data->arg.u.symlink.pages = &page;
3804 data->arg.u.symlink.len = len;
1775fd3e 3805 data->arg.label = label;
1da177e4 3806
57dc9a57
TM		 3807 status = nfs4_do_create(dir, dentry, data);
3808
3809 nfs4_free_createdata(data);
3810out:
1da177e4
LT		 3811 return status;
3812}
3813
4f390c15 3814static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3815 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3816{
3817 struct nfs4_exception exception = { };
aa9c2669 3818 struct nfs4_label l, *label = NULL;
1da177e4 3819 int err;
aa9c2669
DQ		 3820
3821 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3822
1da177e4 3823 do {
078ea3df
TM		 3824 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3825 trace_nfs4_symlink(dir, &dentry->d_name, err);
3826 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3827 &exception);
3828 } while (exception.retry);
aa9c2669
DQ		 3829
3830 nfs4_label_release_security(label);
1da177e4
LT		 3831 return err;
3832}
3833
3834static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3835 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3836{
57dc9a57
TM		 3837 struct nfs4_createdata *data;
3838 int status = -ENOMEM;
1da177e4 3839
57dc9a57
TM		 3840 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3841 if (data == NULL)
3842 goto out;
3843
1775fd3e 3844 data->arg.label = label;
57dc9a57
TM		 3845 status = nfs4_do_create(dir, dentry, data);
3846
3847 nfs4_free_createdata(data);
3848out:
1da177e4
LT		 3849 return status;
3850}
3851
3852static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3853 struct iattr *sattr)
3854{
3855 struct nfs4_exception exception = { };
aa9c2669 3856 struct nfs4_label l, *label = NULL;
1da177e4 3857 int err;
a8a5da99 3858
aa9c2669
DQ		 3859 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3860
a8a5da99 3861 sattr->ia_mode &= ~current_umask();
1da177e4 3862 do {
078ea3df
TM		 3863 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3864 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3865 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3866 &exception);
3867 } while (exception.retry);
aa9c2669
DQ		 3868 nfs4_label_release_security(label);
3869
1da177e4
LT		 3870 return err;
3871}
3872
3873static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3874 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3875{
2b0143b5 3876 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3877 struct nfs4_readdir_arg args = {
3878 .fh = NFS_FH(dir),
56e4ebf8 3879 .pages = pages,
1da177e4
LT		 3880 .pgbase = 0,
3881 .count = count,
2b0143b5 3882 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3883 .plus = plus,
1da177e4
LT		 3884 };
3885 struct nfs4_readdir_res res;
3886 struct rpc_message msg = {
3887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3888 .rpc_argp = &args,
3889 .rpc_resp = &res,
3890 .rpc_cred = cred,
3891 };
3892 int status;
3893
6de1472f
AV		 3894 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3895 dentry,
eadf4598 3896 (unsigned long long)cookie);
c3f52af3 3897 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3898 res.pgbase = args.pgbase;
7c513058 3899 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3900 if (status >= 0) {
c3f52af3 3901 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3902 status += args.pgbase;
3903 }
c4812998
TM		 3904
3905 nfs_invalidate_atime(dir);
3906
3110ff80 3907 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3908 return status;
3909}
3910
3911static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3912 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3913{
3914 struct nfs4_exception exception = { };
3915 int err;
3916 do {
c1578b76
TM		 3917 err = _nfs4_proc_readdir(dentry, cred, cookie,
3918 pages, count, plus);
2b0143b5
DH		 3919 trace_nfs4_readdir(d_inode(dentry), err);
3920 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3921 &exception);
3922 } while (exception.retry);
3923 return err;
3924}
3925
3926static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3927 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3928{
57dc9a57
TM		 3929 struct nfs4_createdata *data;
3930 int mode = sattr->ia_mode;
3931 int status = -ENOMEM;
1da177e4 3932
57dc9a57
TM		 3933 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3934 if (data == NULL)
3935 goto out;
3936
1da177e4 3937 if (S_ISFIFO(mode))
57dc9a57 3938 data->arg.ftype = NF4FIFO;
1da177e4 3939 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3940 data->arg.ftype = NF4BLK;
3941 data->arg.u.device.specdata1 = MAJOR(rdev);
3942 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3943 }
3944 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3945 data->arg.ftype = NF4CHR;
3946 data->arg.u.device.specdata1 = MAJOR(rdev);
3947 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3948 } else if (!S_ISSOCK(mode)) {
3949 status = -EINVAL;
3950 goto out_free;
1da177e4 3951 }
1775fd3e 3952
aa9c2669 3953 data->arg.label = label;
57dc9a57 3954 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3955out_free:
57dc9a57
TM		 3956 nfs4_free_createdata(data);
3957out:
1da177e4
LT		 3958 return status;
3959}
3960
3961static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3962 struct iattr *sattr, dev_t rdev)
3963{
3964 struct nfs4_exception exception = { };
aa9c2669 3965 struct nfs4_label l, *label = NULL;
1da177e4 3966 int err;
a8a5da99 3967
aa9c2669
DQ		 3968 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3969
a8a5da99 3970 sattr->ia_mode &= ~current_umask();
1da177e4 3971 do {
078ea3df
TM		 3972 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3973 trace_nfs4_mknod(dir, &dentry->d_name, err);
3974 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3975 &exception);
3976 } while (exception.retry);
aa9c2669
DQ		 3977
3978 nfs4_label_release_security(label);
3979
1da177e4
LT		 3980 return err;
3981}
3982
3983static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3984 struct nfs_fsstat *fsstat)
3985{
3986 struct nfs4_statfs_arg args = {
3987 .fh = fhandle,
3988 .bitmask = server->attr_bitmask,
3989 };
24ad148a
BH		 3990 struct nfs4_statfs_res res = {
3991 .fsstat = fsstat,
3992 };
1da177e4
LT		 3993 struct rpc_message msg = {
3994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3995 .rpc_argp = &args,
24ad148a 3996 .rpc_resp = &res,
1da177e4
LT		 3997 };
3998
0e574af1 3999 nfs_fattr_init(fsstat->fattr);
7c513058 4000 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4001}
4002
4003static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4004{
4005 struct nfs4_exception exception = { };
4006 int err;
4007 do {
4008 err = nfs4_handle_exception(server,
4009 _nfs4_proc_statfs(server, fhandle, fsstat),
4010 &exception);
4011 } while (exception.retry);
4012 return err;
4013}
4014
4015static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4016 struct nfs_fsinfo *fsinfo)
4017{
4018 struct nfs4_fsinfo_arg args = {
4019 .fh = fhandle,
4020 .bitmask = server->attr_bitmask,
4021 };
3dda5e43
BH		 4022 struct nfs4_fsinfo_res res = {
4023 .fsinfo = fsinfo,
4024 };
1da177e4
LT		 4025 struct rpc_message msg = {
4026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4027 .rpc_argp = &args,
3dda5e43 4028 .rpc_resp = &res,
1da177e4
LT		 4029 };
4030
7c513058 4031 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4032}
4033
4034static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4035{
4036 struct nfs4_exception exception = { };
83ca7f5a 4037 unsigned long now = jiffies;
1da177e4
LT		 4038 int err;
4039
4040 do {
83ca7f5a 4041 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4042 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4043 if (err == 0) {
4044 struct nfs_client *clp = server->nfs_client;
4045
4046 spin_lock(&clp->cl_lock);
4047 clp->cl_lease_time = fsinfo->lease_time * HZ;
4048 clp->cl_last_renewal = now;
4049 spin_unlock(&clp->cl_lock);
4050 break;
4051 }
4052 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4053 } while (exception.retry);
4054 return err;
4055}
4056
4057static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4058{
e38eb650
BS		 4059 int error;
4060
0e574af1 4061 nfs_fattr_init(fsinfo->fattr);
e38eb650 4062 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4063 if (error == 0) {
4064 /* block layout checks this! */
4065 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4066 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4067 }
e38eb650
BS		 4068
4069 return error;
1da177e4
LT		 4070}
4071
4072static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4073 struct nfs_pathconf *pathconf)
4074{
4075 struct nfs4_pathconf_arg args = {
4076 .fh = fhandle,
4077 .bitmask = server->attr_bitmask,
4078 };
d45b2989
BH		 4079 struct nfs4_pathconf_res res = {
4080 .pathconf = pathconf,
4081 };
1da177e4
LT		 4082 struct rpc_message msg = {
4083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4084 .rpc_argp = &args,
d45b2989 4085 .rpc_resp = &res,
1da177e4
LT		 4086 };
4087
4088 /* None of the pathconf attributes are mandatory to implement */
4089 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4090 memset(pathconf, 0, sizeof(*pathconf));
4091 return 0;
4092 }
4093
0e574af1 4094 nfs_fattr_init(pathconf->fattr);
7c513058 4095 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4096}
4097
4098static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4099 struct nfs_pathconf *pathconf)
4100{
4101 struct nfs4_exception exception = { };
4102 int err;
4103
4104 do {
4105 err = nfs4_handle_exception(server,
4106 _nfs4_proc_pathconf(server, fhandle, pathconf),
4107 &exception);
4108 } while (exception.retry);
4109 return err;
4110}
4111
5521abfd 4112int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4113 const struct nfs_open_context *ctx,
4114 const struct nfs_lock_context *l_ctx,
4115 fmode_t fmode)
4116{
4117 const struct nfs_lockowner *lockowner = NULL;
4118
4119 if (l_ctx != NULL)
4120 lockowner = &l_ctx->lockowner;
5521abfd 4121 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4122}
4123EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4124
5521abfd
TM		 4125static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4126 const struct nfs_open_context *ctx,
4127 const struct nfs_lock_context *l_ctx,
4128 fmode_t fmode)
4129{
4130 nfs4_stateid current_stateid;
4131
e1253be0
TM		 4132 /* If the current stateid represents a lost lock, then exit */
4133 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4134 return true;
5521abfd
TM		 4135 return nfs4_stateid_match(stateid, &current_stateid);
4136}
4137
4138static bool nfs4_error_stateid_expired(int err)
4139{
4140 switch (err) {
4141 case -NFS4ERR_DELEG_REVOKED:
4142 case -NFS4ERR_ADMIN_REVOKED:
4143 case -NFS4ERR_BAD_STATEID:
4144 case -NFS4ERR_STALE_STATEID:
4145 case -NFS4ERR_OLD_STATEID:
4146 case -NFS4ERR_OPENMODE:
4147 case -NFS4ERR_EXPIRED:
4148 return true;
4149 }
4150 return false;
4151}
4152
d45f60c6 4153void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4154{
d45f60c6 4155 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4156}
4157
d45f60c6 4158static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4159{
d45f60c6 4160 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4161
d45f60c6
WAA		 4162 trace_nfs4_read(hdr, task->tk_status);
4163 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4164 hdr->args.context->state,
4165 NULL) == -EAGAIN) {
d00c5d43 4166 rpc_restart_call_prepare(task);
ec06c096 4167 return -EAGAIN;
1da177e4 4168 }
8850df99 4169
d45f60c6 4170 __nfs4_read_done_cb(hdr);
1da177e4 4171 if (task->tk_status > 0)
d45f60c6 4172 renew_lease(server, hdr->timestamp);
ec06c096 4173 return 0;
1da177e4
LT		 4174}
4175
5521abfd 4176static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4177 struct nfs_pgio_args *args)
5521abfd
TM		 4178{
4179
4180 if (!nfs4_error_stateid_expired(task->tk_status) ||
4181 nfs4_stateid_is_current(&args->stateid,
4182 args->context,
4183 args->lock_context,
4184 FMODE_READ))
4185 return false;
4186 rpc_restart_call_prepare(task);
4187 return true;
4188}
4189
d45f60c6 4190static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4191{
4192
4193 dprintk("--> %s\n", __func__);
4194
d45f60c6 4195 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4196 return -EAGAIN;
d45f60c6 4197 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4198 return -EAGAIN;
d45f60c6
WAA		 4199 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4200 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4201}
4202
d45f60c6
WAA		 4203static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4204 struct rpc_message *msg)
1da177e4 4205{
d45f60c6
WAA		 4206 hdr->timestamp = jiffies;
4207 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4208 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4209 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4210}
4211
d45f60c6
WAA		 4212static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4213 struct nfs_pgio_header *hdr)
ea7c3303 4214{
d45f60c6
WAA		 4215 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4216 &hdr->args.seq_args,
4217 &hdr->res.seq_res,
9b206149 4218 task))
ef1820f9 4219 return 0;
d45f60c6
WAA		 4220 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4221 hdr->args.lock_context,
4222 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4223 return -EIO;
d45f60c6 4224 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4225 return -EIO;
4226 return 0;
1da177e4
LT		 4227}
4228
d45f60c6
WAA		 4229static int nfs4_write_done_cb(struct rpc_task *task,
4230 struct nfs_pgio_header *hdr)
1da177e4 4231{
d45f60c6 4232 struct inode *inode = hdr->inode;
8478eaa1 4233
d45f60c6
WAA		 4234 trace_nfs4_write(hdr, task->tk_status);
4235 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4236 hdr->args.context->state,
4237 NULL) == -EAGAIN) {
d00c5d43 4238 rpc_restart_call_prepare(task);
788e7a89 4239 return -EAGAIN;
1da177e4 4240 }
4f9838c7 4241 if (task->tk_status >= 0) {
d45f60c6 4242 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4243 nfs_writeback_update_inode(hdr);
4f9838c7 4244 }
788e7a89 4245 return 0;
1da177e4
LT		 4246}
4247
5521abfd 4248static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4249 struct nfs_pgio_args *args)
5521abfd
TM		 4250{
4251
4252 if (!nfs4_error_stateid_expired(task->tk_status) ||
4253 nfs4_stateid_is_current(&args->stateid,
4254 args->context,
4255 args->lock_context,
4256 FMODE_WRITE))
4257 return false;
4258 rpc_restart_call_prepare(task);
4259 return true;
4260}
4261
d45f60c6 4262static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4263{
d45f60c6 4264 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4265 return -EAGAIN;
d45f60c6 4266 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4267 return -EAGAIN;
d45f60c6
WAA		 4268 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4269 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4270}
4271
5a37f851 4272static
d45f60c6 4273bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4274{
5a37f851 4275 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4276 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4277 return false;
4278 /* Otherwise, request attributes if and only if we don't hold
4279 * a delegation
4280 */
011e2a7f 4281 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4282}
a69aef14 4283
d45f60c6
WAA		 4284static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4285 struct rpc_message *msg)
1da177e4 4286{
d45f60c6 4287 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4288
d45f60c6
WAA		 4289 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4290 hdr->args.bitmask = NULL;
4291 hdr->res.fattr = NULL;
7ffd1064 4292 } else
d45f60c6 4293 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4294
d45f60c6
WAA		 4295 if (!hdr->pgio_done_cb)
4296 hdr->pgio_done_cb = nfs4_write_done_cb;
4297 hdr->res.server = server;
4298 hdr->timestamp = jiffies;
1da177e4 4299
bdc7f021 4300 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4301 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4302}
4303
0b7c0153 4304static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4305{
d9afbd1b
TM		 4306 nfs4_setup_sequence(NFS_SERVER(data->inode),
4307 &data->args.seq_args,
4308 &data->res.seq_res,
4309 task);
1da177e4
LT		 4310}
4311
0b7c0153 4312static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4313{
1da177e4 4314 struct inode *inode = data->inode;
14516c3a 4315
cc668ab3 4316 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4317 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4318 NULL, NULL) == -EAGAIN) {
d00c5d43 4319 rpc_restart_call_prepare(task);
788e7a89 4320 return -EAGAIN;
1da177e4 4321 }
788e7a89 4322 return 0;
1da177e4
LT		 4323}
4324
0b7c0153 4325static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4326{
4327 if (!nfs4_sequence_done(task, &data->res.seq_res))
4328 return -EAGAIN;
0b7c0153 4329 return data->commit_done_cb(task, data);
5f452431
FI		 4330}
4331
0b7c0153 4332static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4333{
788e7a89 4334 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4335
0b7c0153
FI		 4336 if (data->commit_done_cb == NULL)
4337 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4338 data->res.server = server;
bdc7f021 4339 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4340 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4341}
4342
9bc4e3ca
CL		 4343struct nfs4_renewdata {
4344 struct nfs_client *client;
4345 unsigned long timestamp;
4346};
4347
1da177e4
LT		 4348/*
4349 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4350 * standalone procedure for queueing an asynchronous RENEW.
4351 */
9bc4e3ca 4352static void nfs4_renew_release(void *calldata)
dc96aef9 4353{
9bc4e3ca
CL		 4354 struct nfs4_renewdata *data = calldata;
4355 struct nfs_client *clp = data->client;
dc96aef9 4356
0851de06
AB		 4357 if (atomic_read(&clp->cl_count) > 1)
4358 nfs4_schedule_state_renewal(clp);
4359 nfs_put_client(clp);
9bc4e3ca 4360 kfree(data);
dc96aef9
AB		 4361}
4362
9bc4e3ca 4363static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4364{
9bc4e3ca
CL		 4365 struct nfs4_renewdata *data = calldata;
4366 struct nfs_client *clp = data->client;
4367 unsigned long timestamp = data->timestamp;
1da177e4 4368
c6d01c6f 4369 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4370 switch (task->tk_status) {
4371 case 0:
4372 break;
4373 case -NFS4ERR_LEASE_MOVED:
4374 nfs4_schedule_lease_moved_recovery(clp);
4375 break;
4376 default:
95baa25c 4377 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4378 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4379 return;
4380 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4381 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4382 return;
4383 }
4384 nfs4_schedule_path_down_recovery(clp);
1da177e4 4385 }
452e9352 4386 do_renew_lease(clp, timestamp);
1da177e4
LT		 4387}
4388
963d8fe5
TM		 4389static const struct rpc_call_ops nfs4_renew_ops = {
4390 .rpc_call_done = nfs4_renew_done,
dc96aef9 4391 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4392};
4393
2f60ea6b 4394static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4395{
4396 struct rpc_message msg = {
4397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4398 .rpc_argp = clp,
b4454fe1 4399 .rpc_cred = cred,
1da177e4 4400 };
9bc4e3ca 4401 struct nfs4_renewdata *data;
1da177e4 4402
2f60ea6b
TM		 4403 if (renew_flags == 0)
4404 return 0;
0851de06
AB		 4405 if (!atomic_inc_not_zero(&clp->cl_count))
4406 return -EIO;
b569ad34 4407 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4408 if (data == NULL)
4409 return -ENOMEM;
4410 data->client = clp;
4411 data->timestamp = jiffies;
bc7a05ca 4412 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4413 &nfs4_renew_ops, data);
1da177e4
LT		 4414}
4415
8534d4ec 4416static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4417{
4418 struct rpc_message msg = {
4419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4420 .rpc_argp = clp,
b4454fe1 4421 .rpc_cred = cred,
1da177e4
LT		 4422 };
4423 unsigned long now = jiffies;
4424 int status;
4425
bc7a05ca 4426 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4427 if (status < 0)
4428 return status;
452e9352 4429 do_renew_lease(clp, now);
1da177e4
LT		 4430 return 0;
4431}
4432
aa1870af
BF		 4433static inline int nfs4_server_supports_acls(struct nfs_server *server)
4434{
7dd7d959 4435 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4436}
4437
21f498c2
TM		 4438/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4439 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4440 * the stack.
4441 */
21f498c2 4442#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4443
e9e3d724
NH		 4444static int buf_to_pages_noslab(const void *buf, size_t buflen,
4445 struct page **pages, unsigned int *pgbase)
4446{
4447 struct page *newpage, **spages;
4448 int rc = 0;
4449 size_t len;
4450 spages = pages;
4451
4452 do {
21f498c2 4453 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4454 newpage = alloc_page(GFP_KERNEL);
4455
4456 if (newpage == NULL)
4457 goto unwind;
4458 memcpy(page_address(newpage), buf, len);
4459 buf += len;
4460 buflen -= len;
4461 *pages++ = newpage;
4462 rc++;
4463 } while (buflen != 0);
4464
4465 return rc;
4466
4467unwind:
4468 for(; rc > 0; rc--)
4469 __free_page(spages[rc-1]);
4470 return -ENOMEM;
4471}
4472
e50a1c2e
BF		 4473struct nfs4_cached_acl {
4474 int cached;
4475 size_t len;
3e9d4154 4476 char data[0];
e50a1c2e
BF		 4477};
4478
4479static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4480{
4481 struct nfs_inode *nfsi = NFS_I(inode);
4482
4483 spin_lock(&inode->i_lock);
4484 kfree(nfsi->nfs4_acl);
4485 nfsi->nfs4_acl = acl;
4486 spin_unlock(&inode->i_lock);
4487}
4488
4489static void nfs4_zap_acl_attr(struct inode *inode)
4490{
4491 nfs4_set_cached_acl(inode, NULL);
4492}
4493
4494static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4495{
4496 struct nfs_inode *nfsi = NFS_I(inode);
4497 struct nfs4_cached_acl *acl;
4498 int ret = -ENOENT;
4499
4500 spin_lock(&inode->i_lock);
4501 acl = nfsi->nfs4_acl;
4502 if (acl == NULL)
4503 goto out;
4504 if (buf == NULL) /* user is just asking for length */
4505 goto out_len;
4506 if (acl->cached == 0)
4507 goto out;
4508 ret = -ERANGE; /* see getxattr(2) man page */
4509 if (acl->len > buflen)
4510 goto out;
4511 memcpy(buf, acl->data, acl->len);
4512out_len:
4513 ret = acl->len;
4514out:
4515 spin_unlock(&inode->i_lock);
4516 return ret;
4517}
4518
5794d21e 4519static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4520{
4521 struct nfs4_cached_acl *acl;
b291f1b1 4522 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4523
1f1ea6c2 4524 if (buflen <= PAGE_SIZE) {
b291f1b1 4525 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4526 if (acl == NULL)
4527 goto out;
4528 acl->cached = 1;
5794d21e 4529 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4530 } else {
4531 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4532 if (acl == NULL)
4533 goto out;
4534 acl->cached = 0;
4535 }
4536 acl->len = acl_len;
4537out:
4538 nfs4_set_cached_acl(inode, acl);
4539}
4540
bf118a34
AA		 4541/*
4542 * The getxattr API returns the required buffer length when called with a
4543 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4544 * the required buf. On a NULL buf, we send a page of data to the server
4545 * guessing that the ACL request can be serviced by a page. If so, we cache
4546 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4547 * the cache. If not so, we throw away the page, and cache the required
4548 * length. The next getxattr call will then produce another round trip to
4549 * the server, this time with the input buf of the required size.
4550 */
16b4289c 4551static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4552{
bf118a34 4553 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4554 struct nfs_getaclargs args = {
4555 .fh = NFS_FH(inode),
4556 .acl_pages = pages,
4557 .acl_len = buflen,
4558 };
663c79b3
BH		 4559 struct nfs_getaclres res = {
4560 .acl_len = buflen,
4561 };
aa1870af
BF		 4562 struct rpc_message msg = {
4563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4564 .rpc_argp = &args,
663c79b3 4565 .rpc_resp = &res,
aa1870af 4566 };
21f498c2
TM		 4567 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4568 int ret = -ENOMEM, i;
aa1870af 4569
bf118a34
AA		 4570 /* As long as we're doing a round trip to the server anyway,
4571 * let's be prepared for a page of acl data. */
4572 if (npages == 0)
4573 npages = 1;
21f498c2
TM		 4574 if (npages > ARRAY_SIZE(pages))
4575 return -ERANGE;
5a006899 4576
bf118a34
AA		 4577 for (i = 0; i < npages; i++) {
4578 pages[i] = alloc_page(GFP_KERNEL);
4579 if (!pages[i])
4580 goto out_free;
e50a1c2e 4581 }
5a006899
SP		 4582
4583 /* for decoding across pages */
4584 res.acl_scratch = alloc_page(GFP_KERNEL);
4585 if (!res.acl_scratch)
4586 goto out_free;
4587
bf118a34
AA		 4588 args.acl_len = npages * PAGE_SIZE;
4589 args.acl_pgbase = 0;
5a006899 4590
de040bec 4591 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4592 __func__, buf, buflen, npages, args.acl_len);
4593 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4594 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4595 if (ret)
4596 goto out_free;
bf118a34 4597
1f1ea6c2
TM		 4598 /* Handle the case where the passed-in buffer is too short */
4599 if (res.acl_flags & NFS4_ACL_TRUNC) {
4600 /* Did the user only issue a request for the acl length? */
4601 if (buf == NULL)
4602 goto out_ok;
e50a1c2e 4603 ret = -ERANGE;
1f1ea6c2 4604 goto out_free;
e50a1c2e 4605 }
1f1ea6c2 4606 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4607 if (buf) {
4608 if (res.acl_len > buflen) {
4609 ret = -ERANGE;
4610 goto out_free;
4611 }
1f1ea6c2 4612 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4613 }
1f1ea6c2
TM		 4614out_ok:
4615 ret = res.acl_len;
e50a1c2e 4616out_free:
bf118a34
AA		 4617 for (i = 0; i < npages; i++)
4618 if (pages[i])
4619 __free_page(pages[i]);
331818f1
TM		 4620 if (res.acl_scratch)
4621 __free_page(res.acl_scratch);
aa1870af
BF		 4622 return ret;
4623}
4624
16b4289c
TM		 4625static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4626{
4627 struct nfs4_exception exception = { };
4628 ssize_t ret;
4629 do {
4630 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4631 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4632 if (ret >= 0)
4633 break;
4634 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4635 } while (exception.retry);
4636 return ret;
4637}
4638
e50a1c2e
BF		 4639static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4640{
4641 struct nfs_server *server = NFS_SERVER(inode);
4642 int ret;
4643
4644 if (!nfs4_server_supports_acls(server))
4645 return -EOPNOTSUPP;
4646 ret = nfs_revalidate_inode(server, inode);
4647 if (ret < 0)
4648 return ret;
08a22b39
AK		 4649 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4650 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4651 ret = nfs4_read_cached_acl(inode, buf, buflen);
4652 if (ret != -ENOENT)
bf118a34
AA		 4653 /* -ENOENT is returned if there is no ACL or if there is an ACL
4654 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4655 return ret;
4656 return nfs4_get_acl_uncached(inode, buf, buflen);
4657}
4658
16b4289c 4659static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4660{
4661 struct nfs_server *server = NFS_SERVER(inode);
4662 struct page *pages[NFS4ACL_MAXPAGES];
4663 struct nfs_setaclargs arg = {
4664 .fh = NFS_FH(inode),
4665 .acl_pages = pages,
4666 .acl_len = buflen,
4667 };
73c403a9 4668 struct nfs_setaclres res;
4b580ee3
BF		 4669 struct rpc_message msg = {
4670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4671 .rpc_argp = &arg,
73c403a9 4672 .rpc_resp = &res,
4b580ee3 4673 };
21f498c2 4674 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4675 int ret, i;
4b580ee3
BF		 4676
4677 if (!nfs4_server_supports_acls(server))
4678 return -EOPNOTSUPP;
21f498c2
TM		 4679 if (npages > ARRAY_SIZE(pages))
4680 return -ERANGE;
e9e3d724
NH		 4681 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4682 if (i < 0)
4683 return i;
57ec14c5 4684 nfs4_inode_return_delegation(inode);
7c513058 4685 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4686
4687 /*
4688 * Free each page after tx, so the only ref left is
4689 * held by the network stack
4690 */
4691 for (; i > 0; i--)
4692 put_page(pages[i-1]);
4693
08a22b39
AK		 4694 /*
4695 * Acl update can result in inode attribute update.
4696 * so mark the attribute cache invalid.
4697 */
4698 spin_lock(&inode->i_lock);
4699 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4700 spin_unlock(&inode->i_lock);
f41f7418
TM		 4701 nfs_access_zap_cache(inode);
4702 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4703 return ret;
4704}
4705
16b4289c
TM		 4706static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4707{
4708 struct nfs4_exception exception = { };
4709 int err;
4710 do {
c1578b76
TM		 4711 err = __nfs4_proc_set_acl(inode, buf, buflen);
4712 trace_nfs4_set_acl(inode, err);
4713 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4714 &exception);
4715 } while (exception.retry);
4716 return err;
4717}
4718
aa9c2669
DQ		 4719#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4720static int _nfs4_get_security_label(struct inode *inode, void *buf,
4721 size_t buflen)
4722{
4723 struct nfs_server *server = NFS_SERVER(inode);
4724 struct nfs_fattr fattr;
4725 struct nfs4_label label = {0, 0, buflen, buf};
4726
4727 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4728 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4729 .fh = NFS_FH(inode),
4730 .bitmask = bitmask,
4731 };
4732 struct nfs4_getattr_res res = {
4733 .fattr = &fattr,
4734 .label = &label,
4735 .server = server,
4736 };
4737 struct rpc_message msg = {
4738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4739 .rpc_argp = &arg,
aa9c2669
DQ		 4740 .rpc_resp = &res,
4741 };
4742 int ret;
4743
4744 nfs_fattr_init(&fattr);
4745
fcb63a9b 4746 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4747 if (ret)
4748 return ret;
4749 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4750 return -ENOENT;
4751 if (buflen < label.len)
4752 return -ERANGE;
4753 return 0;
4754}
4755
4756static int nfs4_get_security_label(struct inode *inode, void *buf,
4757 size_t buflen)
4758{
4759 struct nfs4_exception exception = { };
4760 int err;
4761
4762 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4763 return -EOPNOTSUPP;
4764
4765 do {
c1578b76
TM		 4766 err = _nfs4_get_security_label(inode, buf, buflen);
4767 trace_nfs4_get_security_label(inode, err);
4768 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4769 &exception);
4770 } while (exception.retry);
4771 return err;
4772}
4773
4774static int _nfs4_do_set_security_label(struct inode *inode,
4775 struct nfs4_label *ilabel,
4776 struct nfs_fattr *fattr,
4777 struct nfs4_label *olabel)
4778{
4779
4780 struct iattr sattr = {0};
4781 struct nfs_server *server = NFS_SERVER(inode);
4782 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4783 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4784 .fh = NFS_FH(inode),
4785 .iap = &sattr,
4786 .server = server,
4787 .bitmask = bitmask,
4788 .label = ilabel,
4789 };
4790 struct nfs_setattrres res = {
4791 .fattr = fattr,
4792 .label = olabel,
4793 .server = server,
4794 };
4795 struct rpc_message msg = {
4796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4797 .rpc_argp = &arg,
aa9c2669
DQ		 4798 .rpc_resp = &res,
4799 };
4800 int status;
4801
12207f69 4802 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4803
12207f69 4804 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4805 if (status)
4806 dprintk("%s failed: %d\n", __func__, status);
4807
4808 return status;
4809}
4810
4811static int nfs4_do_set_security_label(struct inode *inode,
4812 struct nfs4_label *ilabel,
4813 struct nfs_fattr *fattr,
4814 struct nfs4_label *olabel)
4815{
4816 struct nfs4_exception exception = { };
4817 int err;
4818
4819 do {
c1578b76
TM		 4820 err = _nfs4_do_set_security_label(inode, ilabel,
4821 fattr, olabel);
4822 trace_nfs4_set_security_label(inode, err);
4823 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4824 &exception);
4825 } while (exception.retry);
4826 return err;
4827}
4828
4829static int
4830nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4831{
4832 struct nfs4_label ilabel, *olabel = NULL;
4833 struct nfs_fattr fattr;
4834 struct rpc_cred *cred;
2b0143b5 4835 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4836 int status;
4837
4838 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4839 return -EOPNOTSUPP;
4840
4841 nfs_fattr_init(&fattr);
4842
4843 ilabel.pi = 0;
4844 ilabel.lfs = 0;
4845 ilabel.label = (char *)buf;
4846 ilabel.len = buflen;
4847
4848 cred = rpc_lookup_cred();
4849 if (IS_ERR(cred))
4850 return PTR_ERR(cred);
4851
4852 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4853 if (IS_ERR(olabel)) {
4854 status = -PTR_ERR(olabel);
4855 goto out;
4856 }
4857
4858 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4859 if (status == 0)
4860 nfs_setsecurity(inode, &fattr, olabel);
4861
4862 nfs4_label_free(olabel);
4863out:
4864 put_rpccred(cred);
4865 return status;
4866}
4867#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4868
4869
1da177e4 4870static int
8478eaa1
N		 4871nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4872 struct nfs4_state *state, long *timeout)
1da177e4 4873{
aa5190d0
TM		 4874 struct nfs_client *clp = server->nfs_client;
4875
4876 if (task->tk_status >= 0)
1da177e4
LT		 4877 return 0;
4878 switch(task->tk_status) {
a1d0b5ee 4879 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4880 case -NFS4ERR_ADMIN_REVOKED:
4881 case -NFS4ERR_BAD_STATEID:
4882 case -NFS4ERR_OPENMODE:
4883 if (state == NULL)
4884 break;
5d422301 4885 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4886 goto recovery_failed;
0400a6b0 4887 goto wait_on_recovery;
0ced63d1 4888 case -NFS4ERR_EXPIRED:
5d422301
TM		 4889 if (state != NULL) {
4890 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4891 goto recovery_failed;
5d422301 4892 }
1da177e4 4893 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4894 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4895 nfs4_schedule_lease_recovery(clp);
4896 goto wait_on_recovery;
519ae255
CL		 4897 case -NFS4ERR_MOVED:
4898 if (nfs4_schedule_migration_recovery(server) < 0)
4899 goto recovery_failed;
4900 goto wait_on_recovery;
8ef2f8d4
CL		 4901 case -NFS4ERR_LEASE_MOVED:
4902 nfs4_schedule_lease_moved_recovery(clp);
4903 goto wait_on_recovery;
4745e315
AA		 4904#if defined(CONFIG_NFS_V4_1)
4905 case -NFS4ERR_BADSESSION:
4906 case -NFS4ERR_BADSLOT:
4907 case -NFS4ERR_BAD_HIGH_SLOT:
4908 case -NFS4ERR_DEADSESSION:
4909 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4910 case -NFS4ERR_SEQ_FALSE_RETRY:
4911 case -NFS4ERR_SEQ_MISORDERED:
4912 dprintk("%s ERROR %d, Reset session\n", __func__,
4913 task->tk_status);
9f594791 4914 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4915 goto wait_on_recovery;
4745e315 4916#endif /* CONFIG_NFS_V4_1 */
1da177e4 4917 case -NFS4ERR_DELAY:
aa5190d0 4918 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4919 rpc_delay(task, nfs4_update_delay(timeout));
4920 goto restart_call;
006ea73e 4921 case -NFS4ERR_GRACE:
1da177e4 4922 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4923 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4924 case -NFS4ERR_OLD_STATEID:
f1478c13 4925 goto restart_call;
1da177e4
LT		 4926 }
4927 task->tk_status = nfs4_map_errors(task->tk_status);
4928 return 0;
9f51a78e 4929recovery_failed:
5d422301
TM		 4930 task->tk_status = -EIO;
4931 return 0;
0400a6b0 4932wait_on_recovery:
a2c0b9e2 4933 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4934 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4935 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4936 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4937 goto recovery_failed;
f1478c13 4938restart_call:
a2c0b9e2
TM		 4939 task->tk_status = 0;
4940 return -EAGAIN;
1da177e4
LT		 4941}
4942
f092075d
CL		 4943static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4944 nfs4_verifier *bootverf)
cd93710e
CL		 4945{
4946 __be32 verf[2];
4947
2c820d9a
CL		 4948 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4949 /* An impossible timestamp guarantees this value
4950 * will never match a generated boot time. */
4951 verf[0] = 0;
17f26b12 4952 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4953 } else {
f092075d 4954 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4955 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4956 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4957 }
cd93710e
CL		 4958 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4959}
4960
a3192688
JL		 4961static int
4962nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4963{
a3192688
JL		 4964 int result;
4965 size_t len;
4966 char *str;
4967 bool retried = false;
e984a55a 4968
ceb3a16c 4969 if (clp->cl_owner_id != NULL)
a3192688
JL		 4970 return 0;
4971retry:
4972 rcu_read_lock();
4973 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4974 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4975 1 +
4976 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4977 1;
4978 rcu_read_unlock();
4979
4980 if (len > NFS4_OPAQUE_LIMIT + 1)
4981 return -EINVAL;
4982
4983 /*
4984 * Since this string is allocated at mount time, and held until the
4985 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4986 * about a memory-reclaim deadlock.
4987 */
4988 str = kmalloc(len, GFP_KERNEL);
4989 if (!str)
4990 return -ENOMEM;
ceb3a16c 4991
e984a55a 4992 rcu_read_lock();
a3192688
JL		 4993 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
4994 clp->cl_ipaddr,
4995 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
4996 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 4997 rcu_read_unlock();
a3192688
JL		 4998
4999 /* Did something change? */
5000 if (result >= len) {
5001 kfree(str);
5002 if (retried)
5003 return -EINVAL;
5004 retried = true;
5005 goto retry;
5006 }
5007 clp->cl_owner_id = str;
5008 return 0;
e984a55a
CL		 5009}
5010
873e3851
JL		 5011static int
5012nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5013{
5014 int result;
5015 size_t len;
5016 char *str;
5017
5018 len = 10 + 10 + 1 + 10 + 1 +
5019 strlen(nfs4_client_id_uniquifier) + 1 +
5020 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5021
5022 if (len > NFS4_OPAQUE_LIMIT + 1)
5023 return -EINVAL;
5024
5025 /*
5026 * Since this string is allocated at mount time, and held until the
5027 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5028 * about a memory-reclaim deadlock.
5029 */
5030 str = kmalloc(len, GFP_KERNEL);
5031 if (!str)
5032 return -ENOMEM;
5033
5034 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5035 clp->rpc_ops->version, clp->cl_minorversion,
5036 nfs4_client_id_uniquifier,
5037 clp->cl_rpcclient->cl_nodename);
5038 if (result >= len) {
5039 kfree(str);
5040 return -EINVAL;
5041 }
5042 clp->cl_owner_id = str;
5043 return 0;
5044}
5045
5046static int
5047nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5048{
873e3851
JL		 5049 int result;
5050 size_t len;
5051 char *str;
ceb3a16c
TM		 5052
5053 if (clp->cl_owner_id != NULL)
873e3851 5054 return 0;
6f2ea7f2
CL		 5055
5056 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5057 return nfs4_init_uniquifier_client_string(clp);
5058
5059 len = 10 + 10 + 1 + 10 + 1 +
5060 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5061
5062 if (len > NFS4_OPAQUE_LIMIT + 1)
5063 return -EINVAL;
5064
5065 /*
5066 * Since this string is allocated at mount time, and held until the
5067 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5068 * about a memory-reclaim deadlock.
5069 */
5070 str = kmalloc(len, GFP_KERNEL);
5071 if (!str)
5072 return -ENOMEM;
5073
5074 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5075 clp->rpc_ops->version, clp->cl_minorversion,
5076 clp->cl_rpcclient->cl_nodename);
5077 if (result >= len) {
5078 kfree(str);
5079 return -EINVAL;
5080 }
5081 clp->cl_owner_id = str;
5082 return 0;
e984a55a
CL		 5083}
5084
706cb8db
CL		 5085/*
5086 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5087 * services. Advertise one based on the address family of the
5088 * clientaddr.
5089 */
5090static unsigned int
5091nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5092{
5093 if (strchr(clp->cl_ipaddr, ':') != NULL)
5094 return scnprintf(buf, len, "tcp6");
5095 else
5096 return scnprintf(buf, len, "tcp");
5097}
5098
f11b2a1c
JL		 5099static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5100{
5101 struct nfs4_setclientid *sc = calldata;
5102
5103 if (task->tk_status == 0)
5104 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5105}
5106
5107static const struct rpc_call_ops nfs4_setclientid_ops = {
5108 .rpc_call_done = nfs4_setclientid_done,
5109};
5110
6bbb4ae8
CL		 5111/**
5112 * nfs4_proc_setclientid - Negotiate client ID
5113 * @clp: state data structure
5114 * @program: RPC program for NFSv4 callback service
5115 * @port: IP port number for NFS4 callback service
5116 * @cred: RPC credential to use for this call
5117 * @res: where to place the result
5118 *
5119 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5120 */
bb8b27e5
TM		 5121int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5122 unsigned short port, struct rpc_cred *cred,
5123 struct nfs4_setclientid_res *res)
1da177e4
LT		 5124{
5125 nfs4_verifier sc_verifier;
5126 struct nfs4_setclientid setclientid = {
5127 .sc_verifier = &sc_verifier,
5128 .sc_prog = program,
3a6bb738 5129 .sc_clnt = clp,
1da177e4
LT		 5130 };
5131 struct rpc_message msg = {
5132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5133 .rpc_argp = &setclientid,
bb8b27e5 5134 .rpc_resp = res,
286d7d6a 5135 .rpc_cred = cred,
1da177e4 5136 };
f11b2a1c
JL		 5137 struct rpc_task *task;
5138 struct rpc_task_setup task_setup_data = {
5139 .rpc_client = clp->cl_rpcclient,
5140 .rpc_message = &msg,
5141 .callback_ops = &nfs4_setclientid_ops,
5142 .callback_data = &setclientid,
5143 .flags = RPC_TASK_TIMEOUT,
5144 };
6bbb4ae8 5145 int status;
1da177e4 5146
de734831 5147 /* nfs_client_id4 */
f092075d 5148 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5149
5150 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5151 status = nfs4_init_uniform_client_string(clp);
5152 else
a3192688 5153 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5154
5155 if (status)
5156 goto out;
3a6bb738 5157
de734831 5158 /* cb_client4 */
706cb8db
CL		 5159 setclientid.sc_netid_len =
5160 nfs4_init_callback_netid(clp,
5161 setclientid.sc_netid,
5162 sizeof(setclientid.sc_netid));
de734831 5163 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5164 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5165 clp->cl_ipaddr, port >> 8, port & 255);
5166
3a6bb738 5167 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5168 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5169 clp->cl_owner_id);
f11b2a1c
JL		 5170 task = rpc_run_task(&task_setup_data);
5171 if (IS_ERR(task)) {
5172 status = PTR_ERR(task);
5173 goto out;
5174 }
5175 status = task->tk_status;
5176 if (setclientid.sc_cred) {
5177 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5178 put_rpccred(setclientid.sc_cred);
5179 }
5180 rpc_put_task(task);
5181out:
c6d01c6f 5182 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5183 dprintk("NFS reply setclientid: %d\n", status);
5184 return status;
1da177e4
LT		 5185}
5186
6bbb4ae8
CL		 5187/**
5188 * nfs4_proc_setclientid_confirm - Confirm client ID
5189 * @clp: state data structure
5190 * @res: result of a previous SETCLIENTID
5191 * @cred: RPC credential to use for this call
5192 *
5193 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5194 */
fd954ae1 5195int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5196 struct nfs4_setclientid_res *arg,
5197 struct rpc_cred *cred)
1da177e4 5198{
1da177e4
LT		 5199 struct rpc_message msg = {
5200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5201 .rpc_argp = arg,
286d7d6a 5202 .rpc_cred = cred,
1da177e4 5203 };
1da177e4
LT		 5204 int status;
5205
6bbb4ae8
CL		 5206 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5207 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5208 clp->cl_clientid);
1bd714f2 5209 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5210 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5211 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5212 return status;
5213}
5214
fe650407
TM		 5215struct nfs4_delegreturndata {
5216 struct nfs4_delegreturnargs args;
fa178f29 5217 struct nfs4_delegreturnres res;
fe650407
TM		 5218 struct nfs_fh fh;
5219 nfs4_stateid stateid;
26e976a8 5220 unsigned long timestamp;
fa178f29 5221 struct nfs_fattr fattr;
fe650407 5222 int rpc_status;
039b756a
PT		 5223 struct inode *inode;
5224 bool roc;
5225 u32 roc_barrier;
fe650407
TM		 5226};
5227
fe650407
TM		 5228static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5229{
5230 struct nfs4_delegreturndata *data = calldata;
938e1010 5231
14516c3a
TM		 5232 if (!nfs4_sequence_done(task, &data->res.seq_res))
5233 return;
938e1010 5234
ca8acf8d 5235 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5236 switch (task->tk_status) {
79708861 5237 case 0:
fa178f29 5238 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5239 case -NFS4ERR_ADMIN_REVOKED:
5240 case -NFS4ERR_DELEG_REVOKED:
5241 case -NFS4ERR_BAD_STATEID:
5242 case -NFS4ERR_OLD_STATEID:
5243 case -NFS4ERR_STALE_STATEID:
5244 case -NFS4ERR_EXPIRED:
5245 task->tk_status = 0;
039b756a
PT		 5246 if (data->roc)
5247 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5248 break;
79708861 5249 default:
8478eaa1
N		 5250 if (nfs4_async_handle_error(task, data->res.server,
5251 NULL, NULL) == -EAGAIN) {
d00c5d43 5252 rpc_restart_call_prepare(task);
79708861
RL		 5253 return;
5254 }
5255 }
5256 data->rpc_status = task->tk_status;
fe650407
TM		 5257}
5258
5259static void nfs4_delegreturn_release(void *calldata)
5260{
039b756a 5261 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5262 struct inode *inode = data->inode;
039b756a 5263
ea7c38fe
TM		 5264 if (inode) {
5265 if (data->roc)
5266 pnfs_roc_release(inode);
5267 nfs_iput_and_deactive(inode);
5268 }
fe650407
TM		 5269 kfree(calldata);
5270}
5271
938e1010
AA		 5272static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5273{
5274 struct nfs4_delegreturndata *d_data;
5275
5276 d_data = (struct nfs4_delegreturndata *)data;
5277
039b756a
PT		 5278 if (d_data->roc &&
5279 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5280 return;
5281
d9afbd1b
TM		 5282 nfs4_setup_sequence(d_data->res.server,
5283 &d_data->args.seq_args,
5284 &d_data->res.seq_res,
5285 task);
938e1010 5286}
938e1010 5287
c8d149f3 5288static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5289 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5290 .rpc_call_done = nfs4_delegreturn_done,
5291 .rpc_release = nfs4_delegreturn_release,
5292};
5293
e6f81075 5294static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5295{
5296 struct nfs4_delegreturndata *data;
fa178f29 5297 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5298 struct rpc_task *task;
5138fde0
TM		 5299 struct rpc_message msg = {
5300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5301 .rpc_cred = cred,
5302 };
c970aa85
TM		 5303 struct rpc_task_setup task_setup_data = {
5304 .rpc_client = server->client,
5138fde0 5305 .rpc_message = &msg,
c970aa85
TM		 5306 .callback_ops = &nfs4_delegreturn_ops,
5307 .flags = RPC_TASK_ASYNC,
5308 };
e6f81075 5309 int status = 0;
fe650407 5310
8535b2be 5311 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5312 if (data == NULL)
5313 return -ENOMEM;
a9c92d6b 5314 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5315 data->args.fhandle = &data->fh;
5316 data->args.stateid = &data->stateid;
9e907fec 5317 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5318 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5319 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5320 data->res.fattr = &data->fattr;
5321 data->res.server = server;
5138fde0 5322 nfs_fattr_init(data->res.fattr);
26e976a8 5323 data->timestamp = jiffies;
fe650407 5324 data->rpc_status = 0;
ea7c38fe
TM		 5325 data->inode = nfs_igrab_and_active(inode);
5326 if (data->inode)
5327 data->roc = nfs4_roc(inode);
fe650407 5328
c970aa85 5329 task_setup_data.callback_data = data;
1174dd1f
TM		 5330 msg.rpc_argp = &data->args;
5331 msg.rpc_resp = &data->res;
c970aa85 5332 task = rpc_run_task(&task_setup_data);
7a1218a2 5333 if (IS_ERR(task))
fe650407 5334 return PTR_ERR(task);
e6f81075
TM		 5335 if (!issync)
5336 goto out;
fe650407 5337 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5338 if (status != 0)
5339 goto out;
5340 status = data->rpc_status;
e144cbcc
TM		 5341 if (status == 0)
5342 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5343 else
5344 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5345out:
e6b3c4db 5346 rpc_put_task(task);
fe650407 5347 return status;
1da177e4
LT		 5348}
5349
e6f81075 5350int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5351{
5352 struct nfs_server *server = NFS_SERVER(inode);
5353 struct nfs4_exception exception = { };
5354 int err;
5355 do {
e6f81075 5356 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5357 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5358 switch (err) {
5359 case -NFS4ERR_STALE_STATEID:
5360 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5361 case 0:
5362 return 0;
5363 }
5364 err = nfs4_handle_exception(server, err, &exception);
5365 } while (exception.retry);
5366 return err;
5367}
5368
5369#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5370#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5371
5372/*
5373 * sleep, with exponential backoff, and retry the LOCK operation.
5374 */
5375static unsigned long
5376nfs4_set_lock_task_retry(unsigned long timeout)
5377{
416ad3c9 5378 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5379 timeout <<= 1;
5380 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5381 return NFS4_LOCK_MAXTIMEOUT;
5382 return timeout;
5383}
5384
1da177e4
LT		 5385static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5386{
5387 struct inode *inode = state->inode;
5388 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5389 struct nfs_client *clp = server->nfs_client;
911d1aaf 5390 struct nfs_lockt_args arg = {
1da177e4 5391 .fh = NFS_FH(inode),
911d1aaf 5392 .fl = request,
1da177e4 5393 };
911d1aaf
TM		 5394 struct nfs_lockt_res res = {
5395 .denied = request,
1da177e4
LT		 5396 };
5397 struct rpc_message msg = {
5398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5399 .rpc_argp = &arg,
5400 .rpc_resp = &res,
5401 .rpc_cred = state->owner->so_cred,
5402 };
1da177e4
LT		 5403 struct nfs4_lock_state *lsp;
5404 int status;
5405
911d1aaf 5406 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5407 status = nfs4_set_lock_state(state, request);
5408 if (status != 0)
5409 goto out;
5410 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5411 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5412 arg.lock_owner.s_dev = server->s_dev;
7c513058 5413 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5414 switch (status) {
5415 case 0:
5416 request->fl_type = F_UNLCK;
5417 break;
5418 case -NFS4ERR_DENIED:
5419 status = 0;
1da177e4 5420 }
70cc6487 5421 request->fl_ops->fl_release_private(request);
a6f951dd 5422 request->fl_ops = NULL;
8d0a8a9d 5423out:
1da177e4
LT		 5424 return status;
5425}
5426
5427static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5428{
5429 struct nfs4_exception exception = { };
5430 int err;
5431
5432 do {
d1b748a5
TM		 5433 err = _nfs4_proc_getlk(state, cmd, request);
5434 trace_nfs4_get_lock(request, state, cmd, err);
5435 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5436 &exception);
5437 } while (exception.retry);
5438 return err;
5439}
5440
5441static int do_vfs_lock(struct file *file, struct file_lock *fl)
5442{
5443 int res = 0;
5444 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5445 case FL_POSIX:
5446 res = posix_lock_file_wait(file, fl);
5447 break;
5448 case FL_FLOCK:
5449 res = flock_lock_file_wait(file, fl);
5450 break;
5451 default:
5452 BUG();
5453 }
1da177e4
LT		 5454 return res;
5455}
5456
faf5f49c 5457struct nfs4_unlockdata {
911d1aaf
TM		 5458 struct nfs_locku_args arg;
5459 struct nfs_locku_res res;
faf5f49c
TM		 5460 struct nfs4_lock_state *lsp;
5461 struct nfs_open_context *ctx;
911d1aaf
TM		 5462 struct file_lock fl;
5463 const struct nfs_server *server;
26e976a8 5464 unsigned long timestamp;
faf5f49c
TM		 5465};
5466
911d1aaf
TM		 5467static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5468 struct nfs_open_context *ctx,
5469 struct nfs4_lock_state *lsp,
5470 struct nfs_seqid *seqid)
5471{
5472 struct nfs4_unlockdata *p;
5473 struct inode *inode = lsp->ls_state->inode;
5474
8535b2be 5475 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5476 if (p == NULL)
5477 return NULL;
5478 p->arg.fh = NFS_FH(inode);
5479 p->arg.fl = &p->fl;
5480 p->arg.seqid = seqid;
c1d51931 5481 p->res.seqid = seqid;
911d1aaf
TM		 5482 p->lsp = lsp;
5483 atomic_inc(&lsp->ls_count);
5484 /* Ensure we don't close file until we're done freeing locks! */
5485 p->ctx = get_nfs_open_context(ctx);
db2efec0 5486 get_file(fl->fl_file);
911d1aaf
TM		 5487 memcpy(&p->fl, fl, sizeof(p->fl));
5488 p->server = NFS_SERVER(inode);
5489 return p;
5490}
5491
06f814a3 5492static void nfs4_locku_release_calldata(void *data)
faf5f49c 5493{
963d8fe5 5494 struct nfs4_unlockdata *calldata = data;
911d1aaf 5495 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5496 nfs4_put_lock_state(calldata->lsp);
5497 put_nfs_open_context(calldata->ctx);
db2efec0 5498 fput(calldata->fl.fl_file);
06f814a3 5499 kfree(calldata);
faf5f49c
TM		 5500}
5501
963d8fe5 5502static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5503{
963d8fe5 5504 struct nfs4_unlockdata *calldata = data;
faf5f49c 5505
14516c3a
TM		 5506 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5507 return;
faf5f49c
TM		 5508 switch (task->tk_status) {
5509 case 0:
26e976a8 5510 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5511 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5512 if (nfs4_update_lock_stateid(calldata->lsp,
5513 &calldata->res.stateid))
5514 break;
9e33bed5
TM		 5515 case -NFS4ERR_BAD_STATEID:
5516 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5517 case -NFS4ERR_STALE_STATEID:
5518 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5519 if (!nfs4_stateid_match(&calldata->arg.stateid,
5520 &calldata->lsp->ls_stateid))
5521 rpc_restart_call_prepare(task);
faf5f49c
TM		 5522 break;
5523 default:
8478eaa1
N		 5524 if (nfs4_async_handle_error(task, calldata->server,
5525 NULL, NULL) == -EAGAIN)
d00c5d43 5526 rpc_restart_call_prepare(task);
faf5f49c 5527 }
2b1bc308 5528 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5529}
5530
4ce70ada 5531static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5532{
4ce70ada 5533 struct nfs4_unlockdata *calldata = data;
faf5f49c 5534
911d1aaf 5535 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5536 goto out_wait;
425c1d4e 5537 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5538 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5539 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5540 goto out_no_action;
faf5f49c 5541 }
26e976a8 5542 calldata->timestamp = jiffies;
035168ab 5543 if (nfs4_setup_sequence(calldata->server,
a893693c 5544 &calldata->arg.seq_args,
2240a9e2
TM		 5545 &calldata->res.seq_res,
5546 task) != 0)
5547 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5548 return;
5549out_no_action:
5550 task->tk_action = NULL;
5551out_wait:
5552 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5553}
5554
963d8fe5 5555static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5556 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5557 .rpc_call_done = nfs4_locku_done,
06f814a3 5558 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5559};
5560
a5d16a4d
TM		 5561static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5562 struct nfs_open_context *ctx,
5563 struct nfs4_lock_state *lsp,
5564 struct nfs_seqid *seqid)
5565{
5566 struct nfs4_unlockdata *data;
5138fde0
TM		 5567 struct rpc_message msg = {
5568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5569 .rpc_cred = ctx->cred,
5570 };
c970aa85
TM		 5571 struct rpc_task_setup task_setup_data = {
5572 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5573 .rpc_message = &msg,
c970aa85 5574 .callback_ops = &nfs4_locku_ops,
101070ca 5575 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5576 .flags = RPC_TASK_ASYNC,
5577 };
a5d16a4d 5578
fa940720
WAA		 5579 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5580 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5581
137d6aca
FF		 5582 /* Ensure this is an unlock - when canceling a lock, the
5583 * canceled lock is passed in, and it won't be an unlock.
5584 */
5585 fl->fl_type = F_UNLCK;
5586
a5d16a4d
TM		 5587 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5588 if (data == NULL) {
5589 nfs_free_seqid(seqid);
5590 return ERR_PTR(-ENOMEM);
5591 }
5592
a9c92d6b 5593 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5594 msg.rpc_argp = &data->arg;
5595 msg.rpc_resp = &data->res;
c970aa85
TM		 5596 task_setup_data.callback_data = data;
5597 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5598}
5599
faf5f49c
TM		 5600static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5601{
65b62a29
TM		 5602 struct inode *inode = state->inode;
5603 struct nfs4_state_owner *sp = state->owner;
5604 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5605 struct nfs_seqid *seqid;
1da177e4 5606 struct nfs4_lock_state *lsp;
06f814a3 5607 struct rpc_task *task;
b4019c0e 5608 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5609 int status = 0;
536ff0f8 5610 unsigned char fl_flags = request->fl_flags;
faf5f49c 5611
8d0a8a9d 5612 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5613 /* Unlock _before_ we do the RPC call */
5614 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5615 /* Exclude nfs_delegation_claim_locks() */
5616 mutex_lock(&sp->so_delegreturn_mutex);
5617 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5618 down_read(&nfsi->rwsem);
5619 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5620 up_read(&nfsi->rwsem);
65b62a29 5621 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5622 goto out;
19e03c57
TM		 5623 }
5624 up_read(&nfsi->rwsem);
65b62a29 5625 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5626 if (status != 0)
9b073574
TM		 5627 goto out;
5628 /* Is this a delegated lock? */
8d0a8a9d 5629 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5630 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5631 goto out;
b4019c0e
TM		 5632 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5633 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5634 status = -ENOMEM;
badc76dd 5635 if (IS_ERR(seqid))
9b073574 5636 goto out;
cd3758e3 5637 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5638 status = PTR_ERR(task);
5639 if (IS_ERR(task))
9b073574 5640 goto out;
a5d16a4d 5641 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5642 rpc_put_task(task);
9b073574 5643out:
536ff0f8 5644 request->fl_flags = fl_flags;
d1b748a5 5645 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5646 return status;
5647}
5648
a5d16a4d
TM		 5649struct nfs4_lockdata {
5650 struct nfs_lock_args arg;
5651 struct nfs_lock_res res;
5652 struct nfs4_lock_state *lsp;
5653 struct nfs_open_context *ctx;
5654 struct file_lock fl;
26e976a8 5655 unsigned long timestamp;
a5d16a4d
TM		 5656 int rpc_status;
5657 int cancelled;
66179efe 5658 struct nfs_server *server;
a5d16a4d
TM		 5659};
5660
5661static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5662 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5663 gfp_t gfp_mask)
1da177e4 5664{
a5d16a4d
TM		 5665 struct nfs4_lockdata *p;
5666 struct inode *inode = lsp->ls_state->inode;
1da177e4 5667 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5668 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5669
8535b2be 5670 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5671 if (p == NULL)
5672 return NULL;
5673
5674 p->arg.fh = NFS_FH(inode);
5675 p->arg.fl = &p->fl;
8535b2be 5676 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5677 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5678 goto out_free;
b4019c0e
TM		 5679 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5680 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5681 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5682 goto out_free_seqid;
7539bbab 5683 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5684 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5685 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5686 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5687 p->lsp = lsp;
66179efe 5688 p->server = server;
a5d16a4d
TM		 5689 atomic_inc(&lsp->ls_count);
5690 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5691 get_file(fl->fl_file);
a5d16a4d
TM		 5692 memcpy(&p->fl, fl, sizeof(p->fl));
5693 return p;
2f74c0a0
TM		 5694out_free_seqid:
5695 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5696out_free:
5697 kfree(p);
5698 return NULL;
5699}
5700
5701static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5702{
5703 struct nfs4_lockdata *data = calldata;
5704 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5705
3110ff80 5706 dprintk("%s: begin!\n", __func__);
2f74c0a0 5707 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5708 goto out_wait;
a5d16a4d 5709 /* Do we need to do an open_to_lock_owner? */
6b447539 5710 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5711 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5712 goto out_release_lock_seqid;
8fe72bac 5713 }
425c1d4e
TM		 5714 nfs4_stateid_copy(&data->arg.open_stateid,
5715 &state->open_stateid);
a5d16a4d 5716 data->arg.new_lock_owner = 1;
c1d51931 5717 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5718 } else {
2f74c0a0 5719 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5720 nfs4_stateid_copy(&data->arg.lock_stateid,
5721 &data->lsp->ls_stateid);
5722 }
5d422301
TM		 5723 if (!nfs4_valid_open_stateid(state)) {
5724 data->rpc_status = -EBADF;
5725 task->tk_action = NULL;
5726 goto out_release_open_seqid;
5727 }
26e976a8 5728 data->timestamp = jiffies;
035168ab
TM		 5729 if (nfs4_setup_sequence(data->server,
5730 &data->arg.seq_args,
2240a9e2 5731 &data->res.seq_res,
d9afbd1b 5732 task) == 0)
66179efe 5733 return;
5d422301 5734out_release_open_seqid:
2240a9e2
TM		 5735 nfs_release_seqid(data->arg.open_seqid);
5736out_release_lock_seqid:
5737 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5738out_wait:
5739 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5740 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5741}
5742
a5d16a4d
TM		 5743static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5744{
5745 struct nfs4_lockdata *data = calldata;
39071e6f 5746 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5747
3110ff80 5748 dprintk("%s: begin!\n", __func__);
a5d16a4d 5749
14516c3a
TM		 5750 if (!nfs4_sequence_done(task, &data->res.seq_res))
5751 return;
66179efe 5752
a5d16a4d 5753 data->rpc_status = task->tk_status;
425c1d4e
TM		 5754 switch (task->tk_status) {
5755 case 0:
2b0143b5 5756 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5757 data->timestamp);
c69899a1
TM		 5758 if (data->arg.new_lock) {
5759 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5760 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5761 rpc_restart_call_prepare(task);
5762 break;
5763 }
5764 }
39071e6f
TM		 5765 if (data->arg.new_lock_owner != 0) {
5766 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5767 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5768 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5769 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5770 rpc_restart_call_prepare(task);
425c1d4e
TM		 5771 break;
5772 case -NFS4ERR_BAD_STATEID:
5773 case -NFS4ERR_OLD_STATEID:
5774 case -NFS4ERR_STALE_STATEID:
5775 case -NFS4ERR_EXPIRED:
5776 if (data->arg.new_lock_owner != 0) {
5777 if (!nfs4_stateid_match(&data->arg.open_stateid,
5778 &lsp->ls_state->open_stateid))
5779 rpc_restart_call_prepare(task);
5780 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5781 &lsp->ls_stateid))
5782 rpc_restart_call_prepare(task);
a5d16a4d 5783 }
3110ff80 5784 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5785}
5786
5787static void nfs4_lock_release(void *calldata)
5788{
5789 struct nfs4_lockdata *data = calldata;
5790
3110ff80 5791 dprintk("%s: begin!\n", __func__);
2f74c0a0 5792 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5793 if (data->cancelled != 0) {
5794 struct rpc_task *task;
5795 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5796 data->arg.lock_seqid);
5797 if (!IS_ERR(task))
bf294b41 5798 rpc_put_task_async(task);
3110ff80 5799 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5800 } else
5801 nfs_free_seqid(data->arg.lock_seqid);
5802 nfs4_put_lock_state(data->lsp);
5803 put_nfs_open_context(data->ctx);
feaff8e5 5804 fput(data->fl.fl_file);
a5d16a4d 5805 kfree(data);
3110ff80 5806 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5807}
5808
5809static const struct rpc_call_ops nfs4_lock_ops = {
5810 .rpc_call_prepare = nfs4_lock_prepare,
5811 .rpc_call_done = nfs4_lock_done,
5812 .rpc_release = nfs4_lock_release,
5813};
5814
2bee72a6
TM		 5815static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5816{
2bee72a6
TM		 5817 switch (error) {
5818 case -NFS4ERR_ADMIN_REVOKED:
5819 case -NFS4ERR_BAD_STATEID:
ecac799a 5820 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5821 if (new_lock_owner != 0 ||
795a88c9 5822 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5823 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5824 break;
5825 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5826 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5827 case -NFS4ERR_EXPIRED:
5828 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5829 };
5830}
5831
afe6c27c 5832static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5833{
5834 struct nfs4_lockdata *data;
5835 struct rpc_task *task;
5138fde0
TM		 5836 struct rpc_message msg = {
5837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5838 .rpc_cred = state->owner->so_cred,
5839 };
c970aa85
TM		 5840 struct rpc_task_setup task_setup_data = {
5841 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5842 .rpc_message = &msg,
c970aa85 5843 .callback_ops = &nfs4_lock_ops,
101070ca 5844 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5845 .flags = RPC_TASK_ASYNC,
5846 };
a5d16a4d
TM		 5847 int ret;
5848
3110ff80 5849 dprintk("%s: begin!\n", __func__);
cd3758e3 5850 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5851 fl->fl_u.nfs4_fl.owner,
5852 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5853 if (data == NULL)
5854 return -ENOMEM;
5855 if (IS_SETLKW(cmd))
5856 data->arg.block = 1;
a9c92d6b 5857 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5858 msg.rpc_argp = &data->arg;
5859 msg.rpc_resp = &data->res;
c970aa85 5860 task_setup_data.callback_data = data;
8fe72bac
TM		 5861 if (recovery_type > NFS_LOCK_NEW) {
5862 if (recovery_type == NFS_LOCK_RECLAIM)
5863 data->arg.reclaim = NFS_LOCK_RECLAIM;
5864 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5865 } else
5866 data->arg.new_lock = 1;
c970aa85 5867 task = rpc_run_task(&task_setup_data);
7a1218a2 5868 if (IS_ERR(task))
a5d16a4d 5869 return PTR_ERR(task);
a5d16a4d
TM		 5870 ret = nfs4_wait_for_completion_rpc_task(task);
5871 if (ret == 0) {
5872 ret = data->rpc_status;
2bee72a6
TM		 5873 if (ret)
5874 nfs4_handle_setlk_error(data->server, data->lsp,
5875 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5876 } else
5877 data->cancelled = 1;
e6b3c4db 5878 rpc_put_task(task);
3110ff80 5879 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5880 return ret;
1da177e4
LT		 5881}
5882
5883static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5884{
202b50dc 5885 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5886 struct nfs4_exception exception = {
5887 .inode = state->inode,
5888 };
202b50dc
TM		 5889 int err;
5890
5891 do {
42a2d13e
TM		 5892 /* Cache the lock if possible... */
5893 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5894 return 0;
afe6c27c 5895 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5896 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5897 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5898 break;
5899 nfs4_handle_exception(server, err, &exception);
5900 } while (exception.retry);
5901 return err;
1da177e4
LT		 5902}
5903
5904static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5905{
202b50dc 5906 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5907 struct nfs4_exception exception = {
5908 .inode = state->inode,
5909 };
202b50dc
TM		 5910 int err;
5911
6bfc93ef
TM		 5912 err = nfs4_set_lock_state(state, request);
5913 if (err != 0)
5914 return err;
f6de7a39 5915 if (!recover_lost_locks) {
ef1820f9
N		 5916 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5917 return 0;
5918 }
202b50dc 5919 do {
42a2d13e
TM		 5920 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5921 return 0;
afe6c27c 5922 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5923 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5924 switch (err) {
5925 default:
5926 goto out;
5927 case -NFS4ERR_GRACE:
5928 case -NFS4ERR_DELAY:
5929 nfs4_handle_exception(server, err, &exception);
5930 err = 0;
5931 }
202b50dc 5932 } while (exception.retry);
a9ed2e25 5933out:
202b50dc 5934 return err;
1da177e4
LT		 5935}
5936
f062eb6c 5937#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5938/**
5939 * nfs41_check_expired_locks - possibly free a lock stateid
5940 *
5941 * @state: NFSv4 state for an inode
5942 *
5943 * Returns NFS_OK if recovery for this stateid is now finished.
5944 * Otherwise a negative NFS4ERR value is returned.
5945 */
b01dd1d8 5946static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5947{
eb64cf96 5948 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5949 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5950 struct nfs_server *server = NFS_SERVER(state->inode);
5951
b01dd1d8 5952 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5953 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5954 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5955
5956 status = nfs41_test_stateid(server,
5957 &lsp->ls_stateid,
5958 cred);
08cb47fa 5959 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5960 if (status != NFS_OK) {
3e60ffdd
CL		 5961 /* Free the stateid unless the server
5962 * informs us the stateid is unrecognized. */
89af2739
CL		 5963 if (status != -NFS4ERR_BAD_STATEID)
5964 nfs41_free_stateid(server,
ab7cb0df
TM		 5965 &lsp->ls_stateid,
5966 cred);
795a88c9 5967 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5968 ret = status;
5969 }
5970 }
5971 };
5972
5973 return ret;
5974}
5975
5976static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5977{
5978 int status = NFS_OK;
5979
5980 if (test_bit(LK_STATE_IN_USE, &state->flags))
5981 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5982 if (status != NFS_OK)
5983 status = nfs4_lock_expired(state, request);
5984 return status;
f062eb6c
BS		 5985}
5986#endif
5987
1da177e4
LT		 5988static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5989{
19e03c57 5990 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5991 unsigned char fl_flags = request->fl_flags;
8e469ebd 5992 int status = -ENOLCK;
1da177e4 5993
8e469ebd
TM		 5994 if ((fl_flags & FL_POSIX) &&
5995 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5996 goto out;
6bfc93ef 5997 /* Is this a delegated open? */
6bfc93ef
TM		 5998 status = nfs4_set_lock_state(state, request);
5999 if (status != 0)
6000 goto out;
01c3b861
TM		 6001 request->fl_flags |= FL_ACCESS;
6002 status = do_vfs_lock(request->fl_file, request);
6003 if (status < 0)
6004 goto out;
19e03c57 6005 down_read(&nfsi->rwsem);
01c3b861 6006 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6007 /* Yes: cache locks! */
01c3b861 6008 /* ...but avoid races with delegation recall... */
19e03c57
TM		 6009 request->fl_flags = fl_flags & ~FL_SLEEP;
6010 status = do_vfs_lock(request->fl_file, request);
c69899a1 6011 up_read(&nfsi->rwsem);
9a99af49 6012 goto out;
9a99af49 6013 }
19e03c57 6014 up_read(&nfsi->rwsem);
c69899a1 6015 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6016out:
6017 request->fl_flags = fl_flags;
1da177e4
LT		 6018 return status;
6019}
6020
6021static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6022{
a1d0b5ee
TM		 6023 struct nfs4_exception exception = {
6024 .state = state,
05ffe24f 6025 .inode = state->inode,
a1d0b5ee 6026 };
1da177e4
LT		 6027 int err;
6028
6029 do {
965b5d67 6030 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6031 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6032 if (err == -NFS4ERR_DENIED)
6033 err = -EAGAIN;
1da177e4 6034 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6035 err, &exception);
1da177e4
LT		 6036 } while (exception.retry);
6037 return err;
6038}
6039
6040static int
6041nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6042{
6043 struct nfs_open_context *ctx;
6044 struct nfs4_state *state;
6045 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6046 int status;
6047
6048 /* verify open state */
cd3758e3 6049 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6050 state = ctx->state;
6051
6052 if (request->fl_start < 0 || request->fl_end < 0)
6053 return -EINVAL;
6054
d953126a
TM		 6055 if (IS_GETLK(cmd)) {
6056 if (state != NULL)
6057 return nfs4_proc_getlk(state, F_GETLK, request);
6058 return 0;
6059 }
1da177e4
LT		 6060
6061 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6062 return -EINVAL;
6063
d953126a
TM		 6064 if (request->fl_type == F_UNLCK) {
6065 if (state != NULL)
6066 return nfs4_proc_unlck(state, cmd, request);
6067 return 0;
6068 }
1da177e4 6069
d953126a
TM		 6070 if (state == NULL)
6071 return -ENOLCK;
55725513
TM		 6072 /*
6073 * Don't rely on the VFS having checked the file open mode,
6074 * since it won't do this for flock() locks.
6075 */
f44106e2 6076 switch (request->fl_type) {
55725513
TM		 6077 case F_RDLCK:
6078 if (!(filp->f_mode & FMODE_READ))
6079 return -EBADF;
6080 break;
6081 case F_WRLCK:
6082 if (!(filp->f_mode & FMODE_WRITE))
6083 return -EBADF;
6084 }
6085
1da177e4
LT		 6086 do {
6087 status = nfs4_proc_setlk(state, cmd, request);
6088 if ((status != -EAGAIN) || IS_SETLK(cmd))
6089 break;
6090 timeout = nfs4_set_lock_task_retry(timeout);
6091 status = -ERESTARTSYS;
6092 if (signalled())
6093 break;
6094 } while(status < 0);
1da177e4
LT		 6095 return status;
6096}
6097
db4f2e63 6098int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6099{
6100 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6101 int err;
6102
6103 err = nfs4_set_lock_state(state, fl);
6104 if (err != 0)
db4f2e63 6105 return err;
4a706fa0 6106 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6107 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6108}
6b3b5496 6109
cf470c3e
TM		 6110struct nfs_release_lockowner_data {
6111 struct nfs4_lock_state *lsp;
5ae67c4f 6112 struct nfs_server *server;
cf470c3e 6113 struct nfs_release_lockowner_args args;
b7e63a10 6114 struct nfs_release_lockowner_res res;
60ea6812 6115 unsigned long timestamp;
cf470c3e
TM		 6116};
6117
fbd4bfd1
CL		 6118static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6119{
6120 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6121 struct nfs_server *server = data->server;
cb04ad2a
PT		 6122 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6123 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6124 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6125 data->timestamp = jiffies;
fbd4bfd1
CL		 6126}
6127
6128static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6129{
6130 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6131 struct nfs_server *server = data->server;
6132
b7e63a10 6133 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6134
6135 switch (task->tk_status) {
6136 case 0:
6137 renew_lease(server, data->timestamp);
6138 break;
6139 case -NFS4ERR_STALE_CLIENTID:
6140 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6141 nfs4_schedule_lease_recovery(server->nfs_client);
6142 break;
60ea6812
CL		 6143 case -NFS4ERR_LEASE_MOVED:
6144 case -NFS4ERR_DELAY:
8478eaa1
N		 6145 if (nfs4_async_handle_error(task, server,
6146 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6147 rpc_restart_call_prepare(task);
6148 }
fbd4bfd1
CL		 6149}
6150
d3c7b7cc
TM		 6151static void nfs4_release_lockowner_release(void *calldata)
6152{
cf470c3e 6153 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6154 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6155 kfree(calldata);
6156}
6157
17280175 6158static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6159 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6160 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6161 .rpc_release = nfs4_release_lockowner_release,
6162};
6163
f1cdae87
JL		 6164static void
6165nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6166{
cf470c3e 6167 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6168 struct rpc_message msg = {
6169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6170 };
6171
6172 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6173 return;
fbd4bfd1 6174
cf470c3e
TM		 6175 data = kmalloc(sizeof(*data), GFP_NOFS);
6176 if (!data)
f1cdae87 6177 return;
cf470c3e 6178 data->lsp = lsp;
5ae67c4f 6179 data->server = server;
cf470c3e
TM		 6180 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6181 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6182 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6183
cf470c3e 6184 msg.rpc_argp = &data->args;
b7e63a10
TM		 6185 msg.rpc_resp = &data->res;
6186 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6187 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6188}
6189
aa1870af
BF		 6190#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6191
64c2ce8b
AK		 6192static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6193 const void *buf, size_t buflen,
6194 int flags, int type)
6b3b5496 6195{
64c2ce8b
AK		 6196 if (strcmp(key, "") != 0)
6197 return -EINVAL;
4b580ee3 6198
2b0143b5 6199 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6200}
6201
64c2ce8b
AK		 6202static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6203 void *buf, size_t buflen, int type)
6b3b5496 6204{
64c2ce8b
AK		 6205 if (strcmp(key, "") != 0)
6206 return -EINVAL;
aa1870af 6207
2b0143b5 6208 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6209}
6210
64c2ce8b
AK		 6211static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6212 size_t list_len, const char *name,
6213 size_t name_len, int type)
6b3b5496 6214{
64c2ce8b 6215 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6216
2b0143b5 6217 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6218 return 0;
64c2ce8b
AK		 6219
6220 if (list && len <= list_len)
6221 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6222 return len;
6b3b5496
BF		 6223}
6224
c9bccef6
DQ		 6225#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6226static inline int nfs4_server_supports_labels(struct nfs_server *server)
6227{
6228 return server->caps & NFS_CAP_SECURITY_LABEL;
6229}
6230
6231static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6232 const void *buf, size_t buflen,
6233 int flags, int type)
6234{
6235 if (security_ismaclabel(key))
6236 return nfs4_set_security_label(dentry, buf, buflen);
6237
6238 return -EOPNOTSUPP;
6239}
6240
6241static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6242 void *buf, size_t buflen, int type)
6243{
6244 if (security_ismaclabel(key))
2b0143b5 6245 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6246 return -EOPNOTSUPP;
6247}
6248
6249static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6250 size_t list_len, const char *name,
6251 size_t name_len, int type)
6252{
6253 size_t len = 0;
6254
2b0143b5
DH		 6255 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6256 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6257 if (list && len <= list_len)
2b0143b5 6258 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6259 }
6260 return len;
6261}
6262
6263static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6264 .prefix = XATTR_SECURITY_PREFIX,
6265 .list = nfs4_xattr_list_nfs4_label,
6266 .get = nfs4_xattr_get_nfs4_label,
6267 .set = nfs4_xattr_set_nfs4_label,
6268};
6269#endif
6270
6271
533eb461
AA		 6272/*
6273 * nfs_fhget will use either the mounted_on_fileid or the fileid
6274 */
69aaaae1
TM		 6275static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6276{
533eb461
AA		 6277 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6278 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6279 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6280 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6281 return;
6282
6283 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6284 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6285 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6286 fattr->nlink = 2;
6287}
6288
f05d147f
BS		 6289static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6290 const struct qstr *name,
6291 struct nfs4_fs_locations *fs_locations,
6292 struct page *page)
683b57b4
TM		 6293{
6294 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6295 u32 bitmask[3] = {
361e624f 6296 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6297 };
6298 struct nfs4_fs_locations_arg args = {
6299 .dir_fh = NFS_FH(dir),
c228fd3a 6300 .name = name,
683b57b4
TM		 6301 .page = page,
6302 .bitmask = bitmask,
6303 };
22958463
BH		 6304 struct nfs4_fs_locations_res res = {
6305 .fs_locations = fs_locations,
6306 };
683b57b4
TM		 6307 struct rpc_message msg = {
6308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6309 .rpc_argp = &args,
22958463 6310 .rpc_resp = &res,
683b57b4
TM		 6311 };
6312 int status;
6313
3110ff80 6314 dprintk("%s: start\n", __func__);
533eb461
AA		 6315
6316 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6317 * is not supported */
6318 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6319 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6320 else
6321 bitmask[0] |= FATTR4_WORD0_FILEID;
6322
c228fd3a 6323 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6324 fs_locations->server = server;
830b8e33 6325 fs_locations->nlocations = 0;
f05d147f 6326 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6327 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6328 return status;
6329}
6330
f05d147f
BS		 6331int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6332 const struct qstr *name,
6333 struct nfs4_fs_locations *fs_locations,
6334 struct page *page)
db0a9593
BS		 6335{
6336 struct nfs4_exception exception = { };
6337 int err;
6338 do {
078ea3df
TM		 6339 err = _nfs4_proc_fs_locations(client, dir, name,
6340 fs_locations, page);
6341 trace_nfs4_get_fs_locations(dir, name, err);
6342 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6343 &exception);
6344 } while (exception.retry);
6345 return err;
6346}
6347
b03d735b
CL		 6348/*
6349 * This operation also signals the server that this client is
6350 * performing migration recovery. The server can stop returning
6351 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6352 * appended to this compound to identify the client ID which is
6353 * performing recovery.
6354 */
6355static int _nfs40_proc_get_locations(struct inode *inode,
6356 struct nfs4_fs_locations *locations,
6357 struct page *page, struct rpc_cred *cred)
6358{
6359 struct nfs_server *server = NFS_SERVER(inode);
6360 struct rpc_clnt *clnt = server->client;
6361 u32 bitmask[2] = {
6362 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6363 };
6364 struct nfs4_fs_locations_arg args = {
6365 .clientid = server->nfs_client->cl_clientid,
6366 .fh = NFS_FH(inode),
6367 .page = page,
6368 .bitmask = bitmask,
6369 .migration = 1, /* skip LOOKUP */
6370 .renew = 1, /* append RENEW */
6371 };
6372 struct nfs4_fs_locations_res res = {
6373 .fs_locations = locations,
6374 .migration = 1,
6375 .renew = 1,
6376 };
6377 struct rpc_message msg = {
6378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6379 .rpc_argp = &args,
6380 .rpc_resp = &res,
6381 .rpc_cred = cred,
6382 };
6383 unsigned long now = jiffies;
6384 int status;
6385
6386 nfs_fattr_init(&locations->fattr);
6387 locations->server = server;
6388 locations->nlocations = 0;
6389
6390 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6391 nfs4_set_sequence_privileged(&args.seq_args);
6392 status = nfs4_call_sync_sequence(clnt, server, &msg,
6393 &args.seq_args, &res.seq_res);
6394 if (status)
6395 return status;
6396
6397 renew_lease(server, now);
6398 return 0;
6399}
6400
6401#ifdef CONFIG_NFS_V4_1
6402
6403/*
6404 * This operation also signals the server that this client is
6405 * performing migration recovery. The server can stop asserting
6406 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6407 * performing this operation is identified in the SEQUENCE
6408 * operation in this compound.
6409 *
6410 * When the client supports GETATTR(fs_locations_info), it can
6411 * be plumbed in here.
6412 */
6413static int _nfs41_proc_get_locations(struct inode *inode,
6414 struct nfs4_fs_locations *locations,
6415 struct page *page, struct rpc_cred *cred)
6416{
6417 struct nfs_server *server = NFS_SERVER(inode);
6418 struct rpc_clnt *clnt = server->client;
6419 u32 bitmask[2] = {
6420 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6421 };
6422 struct nfs4_fs_locations_arg args = {
6423 .fh = NFS_FH(inode),
6424 .page = page,
6425 .bitmask = bitmask,
6426 .migration = 1, /* skip LOOKUP */
6427 };
6428 struct nfs4_fs_locations_res res = {
6429 .fs_locations = locations,
6430 .migration = 1,
6431 };
6432 struct rpc_message msg = {
6433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6434 .rpc_argp = &args,
6435 .rpc_resp = &res,
6436 .rpc_cred = cred,
6437 };
6438 int status;
6439
6440 nfs_fattr_init(&locations->fattr);
6441 locations->server = server;
6442 locations->nlocations = 0;
6443
6444 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6445 nfs4_set_sequence_privileged(&args.seq_args);
6446 status = nfs4_call_sync_sequence(clnt, server, &msg,
6447 &args.seq_args, &res.seq_res);
6448 if (status == NFS4_OK &&
6449 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6450 status = -NFS4ERR_LEASE_MOVED;
6451 return status;
6452}
6453
6454#endif /* CONFIG_NFS_V4_1 */
6455
6456/**
6457 * nfs4_proc_get_locations - discover locations for a migrated FSID
6458 * @inode: inode on FSID that is migrating
6459 * @locations: result of query
6460 * @page: buffer
6461 * @cred: credential to use for this operation
6462 *
6463 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6464 * operation failed, or a negative errno if a local error occurred.
6465 *
6466 * On success, "locations" is filled in, but if the server has
6467 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6468 * asserted.
6469 *
6470 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6471 * from this client that require migration recovery.
6472 */
6473int nfs4_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 nfs_client *clp = server->nfs_client;
6479 const struct nfs4_mig_recovery_ops *ops =
6480 clp->cl_mvops->mig_recovery_ops;
6481 struct nfs4_exception exception = { };
6482 int status;
6483
6484 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6485 (unsigned long long)server->fsid.major,
6486 (unsigned long long)server->fsid.minor,
6487 clp->cl_hostname);
6488 nfs_display_fhandle(NFS_FH(inode), __func__);
6489
6490 do {
6491 status = ops->get_locations(inode, locations, page, cred);
6492 if (status != -NFS4ERR_DELAY)
6493 break;
6494 nfs4_handle_exception(server, status, &exception);
6495 } while (exception.retry);
6496 return status;
6497}
6498
44c99933
CL		 6499/*
6500 * This operation also signals the server that this client is
6501 * performing "lease moved" recovery. The server can stop
6502 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6503 * is appended to this compound to identify the client ID which is
6504 * performing recovery.
6505 */
6506static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6507{
6508 struct nfs_server *server = NFS_SERVER(inode);
6509 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6510 struct rpc_clnt *clnt = server->client;
6511 struct nfs4_fsid_present_arg args = {
6512 .fh = NFS_FH(inode),
6513 .clientid = clp->cl_clientid,
6514 .renew = 1, /* append RENEW */
6515 };
6516 struct nfs4_fsid_present_res res = {
6517 .renew = 1,
6518 };
6519 struct rpc_message msg = {
6520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6521 .rpc_argp = &args,
6522 .rpc_resp = &res,
6523 .rpc_cred = cred,
6524 };
6525 unsigned long now = jiffies;
6526 int status;
6527
6528 res.fh = nfs_alloc_fhandle();
6529 if (res.fh == NULL)
6530 return -ENOMEM;
6531
6532 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6533 nfs4_set_sequence_privileged(&args.seq_args);
6534 status = nfs4_call_sync_sequence(clnt, server, &msg,
6535 &args.seq_args, &res.seq_res);
6536 nfs_free_fhandle(res.fh);
6537 if (status)
6538 return status;
6539
6540 do_renew_lease(clp, now);
6541 return 0;
6542}
6543
6544#ifdef CONFIG_NFS_V4_1
6545
6546/*
6547 * This operation also signals the server that this client is
6548 * performing "lease moved" recovery. The server can stop asserting
6549 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6550 * this operation is identified in the SEQUENCE operation in this
6551 * compound.
6552 */
6553static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6554{
6555 struct nfs_server *server = NFS_SERVER(inode);
6556 struct rpc_clnt *clnt = server->client;
6557 struct nfs4_fsid_present_arg args = {
6558 .fh = NFS_FH(inode),
6559 };
6560 struct nfs4_fsid_present_res res = {
6561 };
6562 struct rpc_message msg = {
6563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6564 .rpc_argp = &args,
6565 .rpc_resp = &res,
6566 .rpc_cred = cred,
6567 };
6568 int status;
6569
6570 res.fh = nfs_alloc_fhandle();
6571 if (res.fh == NULL)
6572 return -ENOMEM;
6573
6574 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6575 nfs4_set_sequence_privileged(&args.seq_args);
6576 status = nfs4_call_sync_sequence(clnt, server, &msg,
6577 &args.seq_args, &res.seq_res);
6578 nfs_free_fhandle(res.fh);
6579 if (status == NFS4_OK &&
6580 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6581 status = -NFS4ERR_LEASE_MOVED;
6582 return status;
6583}
6584
6585#endif /* CONFIG_NFS_V4_1 */
6586
6587/**
6588 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6589 * @inode: inode on FSID to check
6590 * @cred: credential to use for this operation
6591 *
6592 * Server indicates whether the FSID is present, moved, or not
6593 * recognized. This operation is necessary to clear a LEASE_MOVED
6594 * condition for this client ID.
6595 *
6596 * Returns NFS4_OK if the FSID is present on this server,
6597 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6598 * NFS4ERR code if some error occurred on the server, or a
6599 * negative errno if a local failure occurred.
6600 */
6601int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6602{
6603 struct nfs_server *server = NFS_SERVER(inode);
6604 struct nfs_client *clp = server->nfs_client;
6605 const struct nfs4_mig_recovery_ops *ops =
6606 clp->cl_mvops->mig_recovery_ops;
6607 struct nfs4_exception exception = { };
6608 int status;
6609
6610 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6611 (unsigned long long)server->fsid.major,
6612 (unsigned long long)server->fsid.minor,
6613 clp->cl_hostname);
6614 nfs_display_fhandle(NFS_FH(inode), __func__);
6615
6616 do {
6617 status = ops->fsid_present(inode, cred);
6618 if (status != -NFS4ERR_DELAY)
6619 break;
6620 nfs4_handle_exception(server, status, &exception);
6621 } while (exception.retry);
6622 return status;
6623}
6624
5ec16a85 6625/**
a5250def
WAA		 6626 * If 'use_integrity' is true and the state managment nfs_client
6627 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6628 * and the machine credential as per RFC3530bis and RFC5661 Security
6629 * Considerations sections. Otherwise, just use the user cred with the
6630 * filesystem's rpc_client.
5ec16a85 6631 */
a5250def 6632static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6633{
6634 int status;
6635 struct nfs4_secinfo_arg args = {
6636 .dir_fh = NFS_FH(dir),
6637 .name = name,
6638 };
6639 struct nfs4_secinfo_res res = {
6640 .flavors = flavors,
6641 };
6642 struct rpc_message msg = {
6643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6644 .rpc_argp = &args,
6645 .rpc_resp = &res,
6646 };
a5250def 6647 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6648 struct rpc_cred *cred = NULL;
a5250def
WAA		 6649
6650 if (use_integrity) {
6651 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6652 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6653 msg.rpc_cred = cred;
a5250def 6654 }
5a5ea0d4
BS		 6655
6656 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6657
6658 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6659 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6660
a5250def
WAA		 6661 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6662 &res.seq_res, 0);
5a5ea0d4 6663 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6664
7cb852df
WAA		 6665 if (cred)
6666 put_rpccred(cred);
a5250def 6667
5a5ea0d4
BS		 6668 return status;
6669}
6670
72de53ec
BS		 6671int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6672 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6673{
6674 struct nfs4_exception exception = { };
6675 int err;
6676 do {
a5250def
WAA		 6677 err = -NFS4ERR_WRONGSEC;
6678
6679 /* try to use integrity protection with machine cred */
6680 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6681 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6682
6683 /*
6684 * if unable to use integrity protection, or SECINFO with
6685 * integrity protection returns NFS4ERR_WRONGSEC (which is
6686 * disallowed by spec, but exists in deployed servers) use
6687 * the current filesystem's rpc_client and the user cred.
6688 */
6689 if (err == -NFS4ERR_WRONGSEC)
6690 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6691
078ea3df
TM		 6692 trace_nfs4_secinfo(dir, name, err);
6693 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6694 &exception);
6695 } while (exception.retry);
6696 return err;
6697}
6698
557134a3 6699#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6700/*
6701 * Check the exchange flags returned by the server for invalid flags, having
6702 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6703 * DS flags set.
6704 */
6705static int nfs4_check_cl_exchange_flags(u32 flags)
6706{
6707 if (flags & ~EXCHGID4_FLAG_MASK_R)
6708 goto out_inval;
6709 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6710 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6711 goto out_inval;
6712 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6713 goto out_inval;
6714 return NFS_OK;
6715out_inval:
6716 return -NFS4ERR_INVAL;
6717}
6718
78fe0f41 6719static bool
79d4e1f0
CL		 6720nfs41_same_server_scope(struct nfs41_server_scope *a,
6721 struct nfs41_server_scope *b)
78fe0f41
WAA		 6722{
6723 if (a->server_scope_sz == b->server_scope_sz &&
6724 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6725 return true;
6726
6727 return false;
6728}
6729
7c44f1ae
WAA		 6730/*
6731 * nfs4_proc_bind_conn_to_session()
6732 *
6733 * The 4.1 client currently uses the same TCP connection for the
6734 * fore and backchannel.
6735 */
2cf047c9 6736int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6737{
6738 int status;
71a097c6
TM		 6739 struct nfs41_bind_conn_to_session_args args = {
6740 .client = clp,
6741 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6742 };
7c44f1ae
WAA		 6743 struct nfs41_bind_conn_to_session_res res;
6744 struct rpc_message msg = {
6745 .rpc_proc =
6746 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6747 .rpc_argp = &args,
7c44f1ae 6748 .rpc_resp = &res,
2cf047c9 6749 .rpc_cred = cred,
7c44f1ae
WAA		 6750 };
6751
6752 dprintk("--> %s\n", __func__);
7c44f1ae 6753
71a097c6
TM		 6754 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6755 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6756 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6757
6758 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6759 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6760 if (status == 0) {
71a097c6 6761 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6762 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6763 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6764 status = -EIO;
71a097c6 6765 goto out;
7c44f1ae 6766 }
71a097c6 6767 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6768 dprintk("NFS: %s: Unexpected direction from server\n",
6769 __func__);
6770 status = -EIO;
71a097c6 6771 goto out;
7c44f1ae 6772 }
71a097c6 6773 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6774 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6775 __func__);
6776 status = -EIO;
71a097c6 6777 goto out;
7c44f1ae
WAA		 6778 }
6779 }
7c44f1ae
WAA		 6780out:
6781 dprintk("<-- %s status= %d\n", __func__, status);
6782 return status;
6783}
6784
99fe60d0 6785/*
fa940720
WAA		 6786 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6787 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6788 */
6789static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6790 .how = SP4_MACH_CRED,
6791 .enforce.u.words = {
6792 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6793 1 << (OP_EXCHANGE_ID - 32) |
6794 1 << (OP_CREATE_SESSION - 32) |
6795 1 << (OP_DESTROY_SESSION - 32) |
6796 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6797 },
6798 .allow.u.words = {
6799 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6800 1 << (OP_LOCKU) |
6801 1 << (OP_COMMIT),
8b5bee2e 6802 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6803 1 << (OP_SECINFO_NO_NAME - 32) |
6804 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6805 1 << (OP_FREE_STATEID - 32) |
6806 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6807 }
6808};
6809
6810/*
6811 * Select the state protection mode for client `clp' given the server results
6812 * from exchange_id in `sp'.
99fe60d0 6813 *
2031cd1a
WAA		 6814 * Returns 0 on success, negative errno otherwise.
6815 */
6816static int nfs4_sp4_select_mode(struct nfs_client *clp,
6817 struct nfs41_state_protection *sp)
6818{
6819 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6820 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6821 1 << (OP_EXCHANGE_ID - 32) |
6822 1 << (OP_CREATE_SESSION - 32) |
6823 1 << (OP_DESTROY_SESSION - 32) |
6824 1 << (OP_DESTROY_CLIENTID - 32)
6825 };
6826 unsigned int i;
6827
6828 if (sp->how == SP4_MACH_CRED) {
6829 /* Print state protect result */
6830 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6831 for (i = 0; i <= LAST_NFS4_OP; i++) {
6832 if (test_bit(i, sp->enforce.u.longs))
6833 dfprintk(MOUNT, " enforce op %d\n", i);
6834 if (test_bit(i, sp->allow.u.longs))
6835 dfprintk(MOUNT, " allow op %d\n", i);
6836 }
6837
6838 /* make sure nothing is on enforce list that isn't supported */
6839 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6840 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6841 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6842 return -EINVAL;
6843 }
6844 }
6845
6846 /*
6847 * Minimal mode - state operations are allowed to use machine
6848 * credential. Note this already happens by default, so the
6849 * client doesn't have to do anything more than the negotiation.
6850 *
6851 * NOTE: we don't care if EXCHANGE_ID is in the list -
6852 * we're already using the machine cred for exchange_id
6853 * and will never use a different cred.
6854 */
6855 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6856 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6857 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6858 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6859 dfprintk(MOUNT, "sp4_mach_cred:\n");
6860 dfprintk(MOUNT, " minimal mode enabled\n");
6861 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6862 } else {
6863 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6864 return -EINVAL;
6865 }
fa940720
WAA		 6866
6867 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6868 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6869 dfprintk(MOUNT, " cleanup mode enabled\n");
6870 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6871 }
8b5bee2e
WAA		 6872
6873 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6874 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6875 dfprintk(MOUNT, " secinfo mode enabled\n");
6876 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6877 }
3787d506
WAA		 6878
6879 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6880 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6881 dfprintk(MOUNT, " stateid mode enabled\n");
6882 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6883 }
8c21c62c
WAA		 6884
6885 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6886 dfprintk(MOUNT, " write mode enabled\n");
6887 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6888 }
6889
6890 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6891 dfprintk(MOUNT, " commit mode enabled\n");
6892 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6893 }
2031cd1a
WAA		 6894 }
6895
6896 return 0;
6897}
6898
6899/*
6900 * _nfs4_proc_exchange_id()
6bbb4ae8 6901 *
2031cd1a 6902 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6903 */
2031cd1a
WAA		 6904static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6905 u32 sp4_how)
99fe60d0
BH		 6906{
6907 nfs4_verifier verifier;
6908 struct nfs41_exchange_id_args args = {
cd93710e 6909 .verifier = &verifier,
99fe60d0 6910 .client = clp,
cd3fadec 6911#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6912 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6913 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6914 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6915#else
6916 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6917 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6918#endif
99fe60d0
BH		 6919 };
6920 struct nfs41_exchange_id_res res = {
32b01310 6921 0
99fe60d0
BH		 6922 };
6923 int status;
6924 struct rpc_message msg = {
6925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6926 .rpc_argp = &args,
6927 .rpc_resp = &res,
6928 .rpc_cred = cred,
6929 };
99fe60d0 6930
f092075d 6931 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6932
6933 status = nfs4_init_uniform_client_string(clp);
6934 if (status)
3a6bb738 6935 goto out;
3a6bb738
JL		 6936
6937 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6938 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6939 clp->cl_owner_id);
99fe60d0 6940
acdeb69d 6941 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6942 GFP_NOFS);
acdeb69d 6943 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6944 status = -ENOMEM;
6945 goto out;
6946 }
78fe0f41 6947
79d4e1f0 6948 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6949 GFP_NOFS);
177313f1 6950 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6951 status = -ENOMEM;
acdeb69d 6952 goto out_server_owner;
abe9a6d5 6953 }
78fe0f41 6954
bbafffd2 6955 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6956 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6957 status = -ENOMEM;
6958 goto out_server_scope;
6959 }
6960
2031cd1a
WAA		 6961 switch (sp4_how) {
6962 case SP4_NONE:
6963 args.state_protect.how = SP4_NONE;
6964 break;
6965
6966 case SP4_MACH_CRED:
6967 args.state_protect = nfs4_sp4_mach_cred_request;
6968 break;
6969
6970 default:
6971 /* unsupported! */
6972 WARN_ON_ONCE(1);
6973 status = -EINVAL;
6b55970b 6974 goto out_impl_id;
2031cd1a
WAA		 6975 }
6976
1bd714f2 6977 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6978 trace_nfs4_exchange_id(clp, status);
177313f1 6979 if (status == 0)
32b01310 6980 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6981
2031cd1a
WAA		 6982 if (status == 0)
6983 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6984
acdeb69d 6985 if (status == 0) {
32b01310 6986 clp->cl_clientid = res.clientid;
e11259f9
TM		 6987 clp->cl_exchange_flags = res.flags;
6988 /* Client ID is not confirmed */
6989 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6990 clear_bit(NFS4_SESSION_ESTABLISHED,
6991 &clp->cl_session->session_state);
32b01310 6992 clp->cl_seqid = res.seqid;
e11259f9 6993 }
32b01310 6994
acdeb69d
CL		 6995 kfree(clp->cl_serverowner);
6996 clp->cl_serverowner = res.server_owner;
6997 res.server_owner = NULL;
78fe0f41 6998
7d2ed9ac 6999 /* use the most recent implementation id */
59155546
CL		 7000 kfree(clp->cl_implid);
7001 clp->cl_implid = res.impl_id;
6b55970b 7002 res.impl_id = NULL;
7d2ed9ac 7003
177313f1 7004 if (clp->cl_serverscope != NULL &&
79d4e1f0 7005 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7006 res.server_scope)) {
7007 dprintk("%s: server_scope mismatch detected\n",
7008 __func__);
7009 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7010 kfree(clp->cl_serverscope);
7011 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7012 }
7013
177313f1 7014 if (clp->cl_serverscope == NULL) {
79d4e1f0 7015 clp->cl_serverscope = res.server_scope;
6b55970b 7016 res.server_scope = NULL;
abe9a6d5 7017 }
6b55970b 7018 }
7d2ed9ac 7019
6b55970b
KM		 7020out_impl_id:
7021 kfree(res.impl_id);
7d2ed9ac 7022out_server_scope:
abe9a6d5 7023 kfree(res.server_scope);
6b55970b
KM		 7024out_server_owner:
7025 kfree(res.server_owner);
abe9a6d5 7026out:
177313f1 7027 if (clp->cl_implid != NULL)
6bbb4ae8 7028 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7029 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7030 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7031 clp->cl_implid->date.seconds,
7032 clp->cl_implid->date.nseconds);
6bbb4ae8 7033 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7034 return status;
7035}
7036
2031cd1a
WAA		 7037/*
7038 * nfs4_proc_exchange_id()
7039 *
7040 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7041 *
7042 * Since the clientid has expired, all compounds using sessions
7043 * associated with the stale clientid will be returning
7044 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7045 * be in some phase of session reset.
7046 *
7047 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7048 */
7049int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7050{
7051 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7052 int status;
7053
7054 /* try SP4_MACH_CRED if krb5i/p */
7055 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7056 authflavor == RPC_AUTH_GSS_KRB5P) {
7057 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7058 if (!status)
7059 return 0;
7060 }
7061
7062 /* try SP4_NONE */
7063 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7064}
7065
66245539
TM		 7066static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7067 struct rpc_cred *cred)
7068{
7069 struct rpc_message msg = {
7070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7071 .rpc_argp = clp,
7072 .rpc_cred = cred,
7073 };
7074 int status;
7075
7076 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7077 trace_nfs4_destroy_clientid(clp, status);
66245539 7078 if (status)
02c67525 7079 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7080 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7081 return status;
7082}
7083
7084static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7085 struct rpc_cred *cred)
7086{
7087 unsigned int loop;
7088 int ret;
7089
7090 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7091 ret = _nfs4_proc_destroy_clientid(clp, cred);
7092 switch (ret) {
7093 case -NFS4ERR_DELAY:
7094 case -NFS4ERR_CLIENTID_BUSY:
7095 ssleep(1);
7096 break;
7097 default:
7098 return ret;
7099 }
7100 }
7101 return 0;
7102}
7103
7104int nfs4_destroy_clientid(struct nfs_client *clp)
7105{
7106 struct rpc_cred *cred;
7107 int ret = 0;
7108
7109 if (clp->cl_mvops->minor_version < 1)
7110 goto out;
7111 if (clp->cl_exchange_flags == 0)
7112 goto out;
05f4c350
CL		 7113 if (clp->cl_preserve_clid)
7114 goto out;
73d8bde5 7115 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7116 ret = nfs4_proc_destroy_clientid(clp, cred);
7117 if (cred)
7118 put_rpccred(cred);
7119 switch (ret) {
7120 case 0:
7121 case -NFS4ERR_STALE_CLIENTID:
7122 clp->cl_exchange_flags = 0;
7123 }
7124out:
7125 return ret;
7126}
7127
2050f0cc
AA		 7128struct nfs4_get_lease_time_data {
7129 struct nfs4_get_lease_time_args *args;
7130 struct nfs4_get_lease_time_res *res;
7131 struct nfs_client *clp;
7132};
7133
7134static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7135 void *calldata)
7136{
2050f0cc
AA		 7137 struct nfs4_get_lease_time_data *data =
7138 (struct nfs4_get_lease_time_data *)calldata;
7139
7140 dprintk("--> %s\n", __func__);
7141 /* just setup sequence, do not trigger session recovery
7142 since we're invoked within one */
d9afbd1b
TM		 7143 nfs41_setup_sequence(data->clp->cl_session,
7144 &data->args->la_seq_args,
7145 &data->res->lr_seq_res,
7146 task);
2050f0cc
AA		 7147 dprintk("<-- %s\n", __func__);
7148}
7149
7150/*
7151 * Called from nfs4_state_manager thread for session setup, so don't recover
7152 * from sequence operation or clientid errors.
7153 */
7154static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7155{
7156 struct nfs4_get_lease_time_data *data =
7157 (struct nfs4_get_lease_time_data *)calldata;
7158
7159 dprintk("--> %s\n", __func__);
14516c3a
TM		 7160 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7161 return;
2050f0cc
AA		 7162 switch (task->tk_status) {
7163 case -NFS4ERR_DELAY:
7164 case -NFS4ERR_GRACE:
7165 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7166 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7167 task->tk_status = 0;
a8a4ae3a
AA		 7168 /* fall through */
7169 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7170 rpc_restart_call_prepare(task);
2050f0cc
AA		 7171 return;
7172 }
2050f0cc
AA		 7173 dprintk("<-- %s\n", __func__);
7174}
7175
17280175 7176static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7177 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7178 .rpc_call_done = nfs4_get_lease_time_done,
7179};
7180
7181int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7182{
7183 struct rpc_task *task;
7184 struct nfs4_get_lease_time_args args;
7185 struct nfs4_get_lease_time_res res = {
7186 .lr_fsinfo = fsinfo,
7187 };
7188 struct nfs4_get_lease_time_data data = {
7189 .args = &args,
7190 .res = &res,
7191 .clp = clp,
7192 };
7193 struct rpc_message msg = {
7194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7195 .rpc_argp = &args,
7196 .rpc_resp = &res,
7197 };
7198 struct rpc_task_setup task_setup = {
7199 .rpc_client = clp->cl_rpcclient,
7200 .rpc_message = &msg,
7201 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7202 .callback_data = &data,
7203 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7204 };
7205 int status;
7206
a9c92d6b 7207 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7208 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7209 dprintk("--> %s\n", __func__);
7210 task = rpc_run_task(&task_setup);
7211
7212 if (IS_ERR(task))
7213 status = PTR_ERR(task);
7214 else {
7215 status = task->tk_status;
7216 rpc_put_task(task);
7217 }
7218 dprintk("<-- %s return %d\n", __func__, status);
7219
7220 return status;
7221}
7222
fc931582
AA		 7223/*
7224 * Initialize the values to be used by the client in CREATE_SESSION
7225 * If nfs4_init_session set the fore channel request and response sizes,
7226 * use them.
7227 *
7228 * Set the back channel max_resp_sz_cached to zero to force the client to
7229 * always set csa_cachethis to FALSE because the current implementation
7230 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7231 */
7232static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7233{
18aad3d5
AA		 7234 unsigned int max_rqst_sz, max_resp_sz;
7235
7236 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7237 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7238
fc931582 7239 /* Fore channel attributes */
18aad3d5
AA		 7240 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7241 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7242 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7243 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7244
7245 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7246 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7247 __func__,
7248 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7249 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7250
7251 /* Back channel attributes */
fc931582
AA		 7252 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7253 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7254 args->bc_attrs.max_resp_sz_cached = 0;
7255 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7256 args->bc_attrs.max_reqs = 1;
7257
7258 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7259 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7260 __func__,
7261 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7262 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7263 args->bc_attrs.max_reqs);
7264}
7265
79969dd1
TM		 7266static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7267 struct nfs41_create_session_res *res)
8d35301d 7268{
43c2e885 7269 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7270 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7271
43c2e885
BF		 7272 if (rcvd->max_resp_sz > sent->max_resp_sz)
7273 return -EINVAL;
7274 /*
7275 * Our requested max_ops is the minimum we need; we're not
7276 * prepared to break up compounds into smaller pieces than that.
7277 * So, no point even trying to continue if the server won't
7278 * cooperate:
7279 */
7280 if (rcvd->max_ops < sent->max_ops)
7281 return -EINVAL;
7282 if (rcvd->max_reqs == 0)
7283 return -EINVAL;
b4b9a0c1
VG		 7284 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7285 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7286 return 0;
8d35301d
AA		 7287}
7288
79969dd1
TM		 7289static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7290 struct nfs41_create_session_res *res)
43c2e885
BF		 7291{
7292 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7293 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7294
b1c0df5f
TM		 7295 if (!(res->flags & SESSION4_BACK_CHAN))
7296 goto out;
43c2e885
BF		 7297 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7298 return -EINVAL;
7299 if (rcvd->max_resp_sz < sent->max_resp_sz)
7300 return -EINVAL;
7301 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7302 return -EINVAL;
7303 /* These would render the backchannel useless: */
b4b9a0c1 7304 if (rcvd->max_ops != sent->max_ops)
43c2e885 7305 return -EINVAL;
b4b9a0c1 7306 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7307 return -EINVAL;
b1c0df5f 7308out:
43c2e885
BF		 7309 return 0;
7310}
8d35301d 7311
8d35301d 7312static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7313 struct nfs41_create_session_res *res)
8d35301d 7314{
43c2e885 7315 int ret;
8d35301d 7316
79969dd1 7317 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7318 if (ret)
7319 return ret;
79969dd1
TM		 7320 return nfs4_verify_back_channel_attrs(args, res);
7321}
7322
7323static void nfs4_update_session(struct nfs4_session *session,
7324 struct nfs41_create_session_res *res)
7325{
7326 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7327 /* Mark client id and session as being confirmed */
7328 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7329 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7330 session->flags = res->flags;
7331 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7332 if (res->flags & SESSION4_BACK_CHAN)
7333 memcpy(&session->bc_attrs, &res->bc_attrs,
7334 sizeof(session->bc_attrs));
8d35301d
AA		 7335}
7336
848f5bda
TM		 7337static int _nfs4_proc_create_session(struct nfs_client *clp,
7338 struct rpc_cred *cred)
fc931582
AA		 7339{
7340 struct nfs4_session *session = clp->cl_session;
7341 struct nfs41_create_session_args args = {
7342 .client = clp,
79969dd1
TM		 7343 .clientid = clp->cl_clientid,
7344 .seqid = clp->cl_seqid,
fc931582
AA		 7345 .cb_program = NFS4_CALLBACK,
7346 };
79969dd1
TM		 7347 struct nfs41_create_session_res res;
7348
fc931582
AA		 7349 struct rpc_message msg = {
7350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7351 .rpc_argp = &args,
7352 .rpc_resp = &res,
848f5bda 7353 .rpc_cred = cred,
fc931582
AA		 7354 };
7355 int status;
7356
7357 nfs4_init_channel_attrs(&args);
0f91421e 7358 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7359
1bd714f2 7360 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7361 trace_nfs4_create_session(clp, status);
fc931582 7362
43095d39 7363 if (!status) {
8d35301d 7364 /* Verify the session's negotiated channel_attrs values */
79969dd1 7365 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7366 /* Increment the clientid slot sequence id */
79969dd1
TM		 7367 if (clp->cl_seqid == res.seqid)
7368 clp->cl_seqid++;
7369 if (status)
7370 goto out;
7371 nfs4_update_session(session, &res);
fc931582 7372 }
79969dd1 7373out:
fc931582
AA		 7374 return status;
7375}
7376
7377/*
7378 * Issues a CREATE_SESSION operation to the server.
7379 * It is the responsibility of the caller to verify the session is
7380 * expired before calling this routine.
7381 */
848f5bda 7382int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7383{
7384 int status;
7385 unsigned *ptr;
fc931582
AA		 7386 struct nfs4_session *session = clp->cl_session;
7387
7388 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7389
848f5bda 7390 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7391 if (status)
7392 goto out;
7393
aacd5537
AA		 7394 /* Init or reset the session slot tables */
7395 status = nfs4_setup_session_slot_tables(session);
7396 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7397 if (status)
7398 goto out;
7399
7400 ptr = (unsigned *)&session->sess_id.data[0];
7401 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7402 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7403out:
7404 dprintk("<-- %s\n", __func__);
7405 return status;
7406}
7407
0f3e66c6
AA		 7408/*
7409 * Issue the over-the-wire RPC DESTROY_SESSION.
7410 * The caller must serialize access to this routine.
7411 */
848f5bda
TM		 7412int nfs4_proc_destroy_session(struct nfs4_session *session,
7413 struct rpc_cred *cred)
0f3e66c6 7414{
848f5bda
TM		 7415 struct rpc_message msg = {
7416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7417 .rpc_argp = session,
7418 .rpc_cred = cred,
7419 };
0f3e66c6 7420 int status = 0;
0f3e66c6
AA		 7421
7422 dprintk("--> nfs4_proc_destroy_session\n");
7423
7424 /* session is still being setup */
e11259f9
TM		 7425 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7426 return 0;
0f3e66c6 7427
1bd714f2 7428 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7429 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7430
7431 if (status)
08106ac7 7432 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7433 "Session has been destroyed regardless...\n", status);
7434
7435 dprintk("<-- nfs4_proc_destroy_session\n");
7436 return status;
7437}
7438
fc01cea9
AA		 7439/*
7440 * Renew the cl_session lease.
7441 */
d5f8d3fe
TM		 7442struct nfs4_sequence_data {
7443 struct nfs_client *clp;
7444 struct nfs4_sequence_args args;
7445 struct nfs4_sequence_res res;
7446};
7447
dc96aef9
AB		 7448static void nfs41_sequence_release(void *data)
7449{
d5f8d3fe
TM		 7450 struct nfs4_sequence_data *calldata = data;
7451 struct nfs_client *clp = calldata->clp;
dc96aef9 7452
7135840f
AB		 7453 if (atomic_read(&clp->cl_count) > 1)
7454 nfs4_schedule_state_renewal(clp);
7455 nfs_put_client(clp);
d5f8d3fe 7456 kfree(calldata);
dc96aef9
AB		 7457}
7458
aa5190d0
TM		 7459static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7460{
7461 switch(task->tk_status) {
7462 case -NFS4ERR_DELAY:
aa5190d0
TM		 7463 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7464 return -EAGAIN;
7465 default:
0400a6b0 7466 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7467 }
7468 return 0;
7469}
7470
dc96aef9 7471static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7472{
d5f8d3fe
TM		 7473 struct nfs4_sequence_data *calldata = data;
7474 struct nfs_client *clp = calldata->clp;
fc01cea9 7475
14516c3a
TM		 7476 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7477 return;
fc01cea9 7478
c6d01c6f 7479 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7480 if (task->tk_status < 0) {
7481 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7482 if (atomic_read(&clp->cl_count) == 1)
7483 goto out;
fc01cea9 7484
aa5190d0
TM		 7485 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7486 rpc_restart_call_prepare(task);
fc01cea9
AA		 7487 return;
7488 }
7489 }
fc01cea9 7490 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7491out:
fc01cea9
AA		 7492 dprintk("<-- %s\n", __func__);
7493}
7494
7495static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7496{
d5f8d3fe
TM		 7497 struct nfs4_sequence_data *calldata = data;
7498 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7499 struct nfs4_sequence_args *args;
7500 struct nfs4_sequence_res *res;
7501
fc01cea9
AA		 7502 args = task->tk_msg.rpc_argp;
7503 res = task->tk_msg.rpc_resp;
7504
d9afbd1b 7505 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7506}
7507
7508static const struct rpc_call_ops nfs41_sequence_ops = {
7509 .rpc_call_done = nfs41_sequence_call_done,
7510 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7511 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7512};
7513
8fe72bac
TM		 7514static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7515 struct rpc_cred *cred,
7516 bool is_privileged)
fc01cea9 7517{
d5f8d3fe 7518 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7519 struct rpc_message msg = {
7520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7521 .rpc_cred = cred,
7522 };
71ac6da9
TM		 7523 struct rpc_task_setup task_setup_data = {
7524 .rpc_client = clp->cl_rpcclient,
7525 .rpc_message = &msg,
8fe72bac 7526 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7527 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7528 };
fc01cea9 7529
7135840f 7530 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7531 return ERR_PTR(-EIO);
dfb4f309 7532 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7533 if (calldata == NULL) {
7135840f 7534 nfs_put_client(clp);
71ac6da9 7535 return ERR_PTR(-ENOMEM);
fc01cea9 7536 }
a9c92d6b 7537 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7538 if (is_privileged)
7539 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7540 msg.rpc_argp = &calldata->args;
7541 msg.rpc_resp = &calldata->res;
7542 calldata->clp = clp;
71ac6da9 7543 task_setup_data.callback_data = calldata;
fc01cea9 7544
71ac6da9
TM		 7545 return rpc_run_task(&task_setup_data);
7546}
7547
2f60ea6b 7548static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7549{
7550 struct rpc_task *task;
7551 int ret = 0;
7552
2f60ea6b 7553 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7554 return -EAGAIN;
8fe72bac 7555 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7556 if (IS_ERR(task))
7557 ret = PTR_ERR(task);
7558 else
bf294b41 7559 rpc_put_task_async(task);
71ac6da9
TM		 7560 dprintk("<-- %s status=%d\n", __func__, ret);
7561 return ret;
7562}
7563
7564static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7565{
7566 struct rpc_task *task;
7567 int ret;
7568
8fe72bac 7569 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7570 if (IS_ERR(task)) {
7571 ret = PTR_ERR(task);
7572 goto out;
7573 }
7574 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7575 if (!ret) {
7576 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7577
7578 if (task->tk_status == 0)
7579 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7580 ret = task->tk_status;
b4410c2f 7581 }
71ac6da9
TM		 7582 rpc_put_task(task);
7583out:
7584 dprintk("<-- %s status=%d\n", __func__, ret);
7585 return ret;
fc01cea9
AA		 7586}
7587
fce5c838
RL		 7588struct nfs4_reclaim_complete_data {
7589 struct nfs_client *clp;
7590 struct nfs41_reclaim_complete_args arg;
7591 struct nfs41_reclaim_complete_res res;
7592};
7593
7594static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7595{
7596 struct nfs4_reclaim_complete_data *calldata = data;
7597
d9afbd1b
TM		 7598 nfs41_setup_sequence(calldata->clp->cl_session,
7599 &calldata->arg.seq_args,
7600 &calldata->res.seq_res,
7601 task);
fce5c838
RL		 7602}
7603
aa5190d0
TM		 7604static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7605{
7606 switch(task->tk_status) {
7607 case 0:
7608 case -NFS4ERR_COMPLETE_ALREADY:
7609 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7610 break;
7611 case -NFS4ERR_DELAY:
aa5190d0 7612 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7613 /* fall through */
7614 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7615 return -EAGAIN;
7616 default:
0400a6b0 7617 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7618 }
7619 return 0;
7620}
7621
fce5c838
RL		 7622static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7623{
7624 struct nfs4_reclaim_complete_data *calldata = data;
7625 struct nfs_client *clp = calldata->clp;
7626 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7627
7628 dprintk("--> %s\n", __func__);
14516c3a
TM		 7629 if (!nfs41_sequence_done(task, res))
7630 return;
fce5c838 7631
c6d01c6f 7632 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7633 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7634 rpc_restart_call_prepare(task);
7635 return;
7636 }
fce5c838
RL		 7637 dprintk("<-- %s\n", __func__);
7638}
7639
7640static void nfs4_free_reclaim_complete_data(void *data)
7641{
7642 struct nfs4_reclaim_complete_data *calldata = data;
7643
7644 kfree(calldata);
7645}
7646
7647static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7648 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7649 .rpc_call_done = nfs4_reclaim_complete_done,
7650 .rpc_release = nfs4_free_reclaim_complete_data,
7651};
7652
7653/*
7654 * Issue a global reclaim complete.
7655 */
965e9c23
TM		 7656static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7657 struct rpc_cred *cred)
fce5c838
RL		 7658{
7659 struct nfs4_reclaim_complete_data *calldata;
7660 struct rpc_task *task;
7661 struct rpc_message msg = {
7662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7663 .rpc_cred = cred,
fce5c838
RL		 7664 };
7665 struct rpc_task_setup task_setup_data = {
7666 .rpc_client = clp->cl_rpcclient,
7667 .rpc_message = &msg,
7668 .callback_ops = &nfs4_reclaim_complete_call_ops,
7669 .flags = RPC_TASK_ASYNC,
7670 };
7671 int status = -ENOMEM;
7672
7673 dprintk("--> %s\n", __func__);
8535b2be 7674 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7675 if (calldata == NULL)
7676 goto out;
7677 calldata->clp = clp;
7678 calldata->arg.one_fs = 0;
fce5c838 7679
a9c92d6b 7680 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7681 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7682 msg.rpc_argp = &calldata->arg;
7683 msg.rpc_resp = &calldata->res;
7684 task_setup_data.callback_data = calldata;
7685 task = rpc_run_task(&task_setup_data);
acf82b85 7686 if (IS_ERR(task)) {
fce5c838 7687 status = PTR_ERR(task);
acf82b85
DC		 7688 goto out;
7689 }
c34c32ea
AA		 7690 status = nfs4_wait_for_completion_rpc_task(task);
7691 if (status == 0)
7692 status = task->tk_status;
fce5c838 7693 rpc_put_task(task);
acf82b85 7694 return 0;
fce5c838
RL		 7695out:
7696 dprintk("<-- %s status=%d\n", __func__, status);
7697 return status;
7698}
b1f69b75
AA		 7699
7700static void
7701nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7702{
7703 struct nfs4_layoutget *lgp = calldata;
c31663d4 7704 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7705 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7706
7707 dprintk("--> %s\n", __func__);
c31663d4
FI		 7708 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7709 * right now covering the LAYOUTGET we are about to send.
7710 * However, that is not so catastrophic, and there seems
7711 * to be no way to prevent it completely.
7712 */
6ba7db34 7713 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7714 &lgp->res.seq_res, task))
b1f69b75 7715 return;
cf7d63f1
FI		 7716 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7717 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7718 &lgp->args.range,
cf7d63f1
FI		 7719 lgp->args.ctx->state)) {
7720 rpc_exit(task, NFS4_OK);
cf7d63f1 7721 }
b1f69b75
AA		 7722}
7723
7724static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7725{
7726 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7727 struct inode *inode = lgp->args.inode;
7728 struct nfs_server *server = NFS_SERVER(inode);
7729 struct pnfs_layout_hdr *lo;
7730 struct nfs4_state *state = NULL;
ed7e5423 7731 unsigned long timeo, now, giveup;
b1f69b75 7732
ed7e5423 7733 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7734
6ba7db34 7735 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7736 goto out;
b1f69b75
AA		 7737
7738 switch (task->tk_status) {
7739 case 0:
ee314c2a 7740 goto out;
ed7e5423
BH		 7741 /*
7742 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7743 * (or clients) writing to the same RAID stripe
7744 */
b1f69b75 7745 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7746 /*
7747 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7748 * existing layout before getting a new one).
7749 */
b1f69b75 7750 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7751 timeo = rpc_get_timeout(task->tk_client);
7752 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7753 now = jiffies;
7754 if (time_after(giveup, now)) {
7755 unsigned long delay;
7756
7757 /* Delay for:
7758 * - Not less then NFS4_POLL_RETRY_MIN.
7759 * - One last time a jiffie before we give up
7760 * - exponential backoff (time_now minus start_attempt)
7761 */
7762 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7763 min((giveup - now - 1),
7764 now - lgp->args.timestamp));
7765
7766 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7767 __func__, delay);
7768 rpc_delay(task, delay);
7769 task->tk_status = 0;
7770 rpc_restart_call_prepare(task);
7771 goto out; /* Do not call nfs4_async_handle_error() */
7772 }
ee314c2a
TM		 7773 break;
7774 case -NFS4ERR_EXPIRED:
7775 case -NFS4ERR_BAD_STATEID:
7776 spin_lock(&inode->i_lock);
7777 lo = NFS_I(inode)->layout;
7778 if (!lo || list_empty(&lo->plh_segs)) {
7779 spin_unlock(&inode->i_lock);
7780 /* If the open stateid was bad, then recover it. */
7781 state = lgp->args.ctx->state;
7782 } else {
7783 LIST_HEAD(head);
7784
defb8460
CH		 7785 /*
7786 * Mark the bad layout state as invalid, then retry
7787 * with the current stateid.
7788 */
ee314c2a
TM		 7789 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7790 spin_unlock(&inode->i_lock);
ee314c2a 7791 pnfs_free_lseg_list(&head);
defb8460
CH		 7792
7793 task->tk_status = 0;
7794 rpc_restart_call_prepare(task);
b1f69b75
AA		 7795 }
7796 }
8478eaa1 7797 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7798 rpc_restart_call_prepare(task);
7799out:
b1f69b75
AA		 7800 dprintk("<-- %s\n", __func__);
7801}
7802
8554116e
IK		 7803static size_t max_response_pages(struct nfs_server *server)
7804{
7805 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7806 return nfs_page_array_len(0, max_resp_sz);
7807}
7808
7809static void nfs4_free_pages(struct page **pages, size_t size)
7810{
7811 int i;
7812
7813 if (!pages)
7814 return;
7815
7816 for (i = 0; i < size; i++) {
7817 if (!pages[i])
7818 break;
7819 __free_page(pages[i]);
7820 }
7821 kfree(pages);
7822}
7823
7824static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7825{
7826 struct page **pages;
7827 int i;
7828
7829 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7830 if (!pages) {
7831 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7832 return NULL;
7833 }
7834
7835 for (i = 0; i < size; i++) {
7836 pages[i] = alloc_page(gfp_flags);
7837 if (!pages[i]) {
7838 dprintk("%s: failed to allocate page\n", __func__);
7839 nfs4_free_pages(pages, size);
7840 return NULL;
7841 }
7842 }
7843
7844 return pages;
7845}
7846
b1f69b75
AA		 7847static void nfs4_layoutget_release(void *calldata)
7848{
7849 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7850 struct inode *inode = lgp->args.inode;
7851 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7852 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7853
7854 dprintk("--> %s\n", __func__);
8554116e 7855 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7856 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7857 put_nfs_open_context(lgp->args.ctx);
7858 kfree(calldata);
7859 dprintk("<-- %s\n", __func__);
7860}
7861
7862static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7863 .rpc_call_prepare = nfs4_layoutget_prepare,
7864 .rpc_call_done = nfs4_layoutget_done,
7865 .rpc_release = nfs4_layoutget_release,
7866};
7867
a0b0a6e3
TM		 7868struct pnfs_layout_segment *
7869nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7870{
a47970ff
WAA		 7871 struct inode *inode = lgp->args.inode;
7872 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7873 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7874 struct rpc_task *task;
7875 struct rpc_message msg = {
7876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7877 .rpc_argp = &lgp->args,
7878 .rpc_resp = &lgp->res,
6ab59344 7879 .rpc_cred = lgp->cred,
b1f69b75
AA		 7880 };
7881 struct rpc_task_setup task_setup_data = {
7882 .rpc_client = server->client,
7883 .rpc_message = &msg,
7884 .callback_ops = &nfs4_layoutget_call_ops,
7885 .callback_data = lgp,
7886 .flags = RPC_TASK_ASYNC,
7887 };
a0b0a6e3 7888 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7889 int status = 0;
7890
7891 dprintk("--> %s\n", __func__);
7892
4bd5a980
PT		 7893 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7894 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7895
8554116e
IK		 7896 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7897 if (!lgp->args.layout.pages) {
7898 nfs4_layoutget_release(lgp);
a0b0a6e3 7899 return ERR_PTR(-ENOMEM);
8554116e
IK		 7900 }
7901 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7902 lgp->args.timestamp = jiffies;
8554116e 7903
35124a09 7904 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7905 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7906 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7907
b1f69b75
AA		 7908 task = rpc_run_task(&task_setup_data);
7909 if (IS_ERR(task))
a0b0a6e3 7910 return ERR_CAST(task);
b1f69b75 7911 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7912 if (status == 0)
7913 status = task->tk_status;
1037e6ea
TM		 7914 trace_nfs4_layoutget(lgp->args.ctx,
7915 &lgp->args.range,
7916 &lgp->res.range,
7917 status);
085b7a45
WAA		 7918 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7919 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7920 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7921 rpc_put_task(task);
7922 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7923 if (status)
7924 return ERR_PTR(status);
7925 return lseg;
b1f69b75
AA		 7926}
7927
cbe82603
BH		 7928static void
7929nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7930{
7931 struct nfs4_layoutreturn *lrp = calldata;
7932
7933 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7934 nfs41_setup_sequence(lrp->clp->cl_session,
7935 &lrp->args.seq_args,
7936 &lrp->res.seq_res,
7937 task);
cbe82603
BH		 7938}
7939
7940static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7941{
7942 struct nfs4_layoutreturn *lrp = calldata;
7943 struct nfs_server *server;
7944
7945 dprintk("--> %s\n", __func__);
7946
6ba7db34 7947 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7948 return;
7949
7950 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7951 switch (task->tk_status) {
7952 default:
7953 task->tk_status = 0;
7954 case 0:
7955 break;
7956 case -NFS4ERR_DELAY:
8478eaa1 7957 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7958 break;
d00c5d43 7959 rpc_restart_call_prepare(task);
cbe82603
BH		 7960 return;
7961 }
cbe82603
BH		 7962 dprintk("<-- %s\n", __func__);
7963}
7964
7965static void nfs4_layoutreturn_release(void *calldata)
7966{
7967 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7968 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7969
7970 dprintk("--> %s\n", __func__);
849b286f
TM		 7971 spin_lock(&lo->plh_inode->i_lock);
7972 if (lrp->res.lrs_present)
7973 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7974 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7975 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7976 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7977 lo->plh_block_lgets--;
7978 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7979 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7980 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7981 kfree(calldata);
7982 dprintk("<-- %s\n", __func__);
7983}
7984
7985static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7986 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7987 .rpc_call_done = nfs4_layoutreturn_done,
7988 .rpc_release = nfs4_layoutreturn_release,
7989};
7990
6c16605d 7991int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7992{
7993 struct rpc_task *task;
7994 struct rpc_message msg = {
7995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7996 .rpc_argp = &lrp->args,
7997 .rpc_resp = &lrp->res,
9556000d 7998 .rpc_cred = lrp->cred,
cbe82603
BH		 7999 };
8000 struct rpc_task_setup task_setup_data = {
1771c577 8001 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8002 .rpc_message = &msg,
8003 .callback_ops = &nfs4_layoutreturn_call_ops,
8004 .callback_data = lrp,
8005 };
6c16605d 8006 int status = 0;
cbe82603
BH		 8007
8008 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8009 if (!sync) {
8010 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8011 if (!lrp->inode) {
8012 nfs4_layoutreturn_release(lrp);
8013 return -EAGAIN;
8014 }
8015 task_setup_data.flags |= RPC_TASK_ASYNC;
8016 }
a9c92d6b 8017 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8018 task = rpc_run_task(&task_setup_data);
8019 if (IS_ERR(task))
8020 return PTR_ERR(task);
5a0ec8ac
TM		 8021 if (sync)
8022 status = task->tk_status;
1037e6ea 8023 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8024 dprintk("<-- %s status=%d\n", __func__, status);
8025 rpc_put_task(task);
8026 return status;
8027}
8028
b1f69b75 8029static int
cd5875fe
TM		 8030_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8031 struct pnfs_device *pdev,
8032 struct rpc_cred *cred)
b1f69b75
AA		 8033{
8034 struct nfs4_getdeviceinfo_args args = {
8035 .pdev = pdev,
4e590803
TM		 8036 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8037 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8038 };
8039 struct nfs4_getdeviceinfo_res res = {
8040 .pdev = pdev,
8041 };
8042 struct rpc_message msg = {
8043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8044 .rpc_argp = &args,
8045 .rpc_resp = &res,
cd5875fe 8046 .rpc_cred = cred,
b1f69b75
AA		 8047 };
8048 int status;
8049
8050 dprintk("--> %s\n", __func__);
7c513058 8051 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8052 if (res.notification & ~args.notify_types)
8053 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8054 if (res.notification != args.notify_types)
8055 pdev->nocache = 1;
4e590803 8056
b1f69b75
AA		 8057 dprintk("<-- %s status=%d\n", __func__, status);
8058
8059 return status;
8060}
8061
cd5875fe
TM		 8062int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8063 struct pnfs_device *pdev,
8064 struct rpc_cred *cred)
b1f69b75
AA		 8065{
8066 struct nfs4_exception exception = { };
8067 int err;
8068
8069 do {
8070 err = nfs4_handle_exception(server,
cd5875fe 8071 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8072 &exception);
8073 } while (exception.retry);
8074 return err;
8075}
8076EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8077
863a3c6c
AA		 8078static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8079{
8080 struct nfs4_layoutcommit_data *data = calldata;
8081 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8082 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8083
d9afbd1b
TM		 8084 nfs41_setup_sequence(session,
8085 &data->args.seq_args,
8086 &data->res.seq_res,
8087 task);
863a3c6c
AA		 8088}
8089
8090static void
8091nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8092{
8093 struct nfs4_layoutcommit_data *data = calldata;
8094 struct nfs_server *server = NFS_SERVER(data->args.inode);
8095
6ba7db34 8096 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8097 return;
8098
8099 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8100 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8101 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8102 case -NFS4ERR_BADLAYOUT: /* no layout */
8103 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8104 task->tk_status = 0;
e59d27e0 8105 case 0:
e59d27e0
TM		 8106 break;
8107 default:
8478eaa1 8108 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8109 rpc_restart_call_prepare(task);
8110 return;
8111 }
8112 }
863a3c6c
AA		 8113}
8114
8115static void nfs4_layoutcommit_release(void *calldata)
8116{
8117 struct nfs4_layoutcommit_data *data = calldata;
8118
db29c089 8119 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8120 nfs_post_op_update_inode_force_wcc(data->args.inode,
8121 data->res.fattr);
863a3c6c 8122 put_rpccred(data->cred);
472e2594 8123 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8124 kfree(data);
8125}
8126
8127static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8128 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8129 .rpc_call_done = nfs4_layoutcommit_done,
8130 .rpc_release = nfs4_layoutcommit_release,
8131};
8132
8133int
ef311537 8134nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8135{
8136 struct rpc_message msg = {
8137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8138 .rpc_argp = &data->args,
8139 .rpc_resp = &data->res,
8140 .rpc_cred = data->cred,
8141 };
8142 struct rpc_task_setup task_setup_data = {
8143 .task = &data->task,
8144 .rpc_client = NFS_CLIENT(data->args.inode),
8145 .rpc_message = &msg,
8146 .callback_ops = &nfs4_layoutcommit_ops,
8147 .callback_data = data,
863a3c6c
AA		 8148 };
8149 struct rpc_task *task;
8150 int status = 0;
8151
b4839ebe
KM		 8152 dprintk("NFS: initiating layoutcommit call. sync %d "
8153 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8154 data->args.lastbytewritten,
8155 data->args.inode->i_ino);
8156
472e2594
TM		 8157 if (!sync) {
8158 data->inode = nfs_igrab_and_active(data->args.inode);
8159 if (data->inode == NULL) {
8160 nfs4_layoutcommit_release(data);
8161 return -EAGAIN;
8162 }
8163 task_setup_data.flags = RPC_TASK_ASYNC;
8164 }
a9c92d6b 8165 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8166 task = rpc_run_task(&task_setup_data);
8167 if (IS_ERR(task))
8168 return PTR_ERR(task);
472e2594
TM		 8169 if (sync)
8170 status = task->tk_status;
1037e6ea 8171 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8172 dprintk("%s: status %d\n", __func__, status);
8173 rpc_put_task(task);
8174 return status;
8175}
fca78d6d 8176
97431204
AA		 8177/**
8178 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8179 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8180 */
fca78d6d
BS		 8181static int
8182_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8183 struct nfs_fsinfo *info,
8184 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8185{
8186 struct nfs41_secinfo_no_name_args args = {
8187 .style = SECINFO_STYLE_CURRENT_FH,
8188 };
8189 struct nfs4_secinfo_res res = {
8190 .flavors = flavors,
8191 };
8192 struct rpc_message msg = {
8193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8194 .rpc_argp = &args,
8195 .rpc_resp = &res,
8196 };
b1b3e136 8197 struct rpc_clnt *clnt = server->client;
7cb852df 8198 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8199 int status;
8200
8201 if (use_integrity) {
8202 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8203 cred = nfs4_get_clid_cred(server->nfs_client);
8204 msg.rpc_cred = cred;
b1b3e136
WAA		 8205 }
8206
8207 dprintk("--> %s\n", __func__);
8208 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8209 &res.seq_res, 0);
8210 dprintk("<-- %s status=%d\n", __func__, status);
8211
7cb852df
WAA		 8212 if (cred)
8213 put_rpccred(cred);
b1b3e136
WAA		 8214
8215 return status;
fca78d6d
BS		 8216}
8217
8218static int
8219nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8220 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8221{
8222 struct nfs4_exception exception = { };
8223 int err;
8224 do {
b1b3e136
WAA		 8225 /* first try using integrity protection */
8226 err = -NFS4ERR_WRONGSEC;
8227
8228 /* try to use integrity protection with machine cred */
8229 if (_nfs4_is_integrity_protected(server->nfs_client))
8230 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8231 flavors, true);
8232
8233 /*
8234 * if unable to use integrity protection, or SECINFO with
8235 * integrity protection returns NFS4ERR_WRONGSEC (which is
8236 * disallowed by spec, but exists in deployed servers) use
8237 * the current filesystem's rpc_client and the user cred.
8238 */
8239 if (err == -NFS4ERR_WRONGSEC)
8240 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8241 flavors, false);
8242
fca78d6d
BS		 8243 switch (err) {
8244 case 0:
8245 case -NFS4ERR_WRONGSEC:
78b19bae 8246 case -ENOTSUPP:
05e9cfb4 8247 goto out;
fca78d6d
BS		 8248 default:
8249 err = nfs4_handle_exception(server, err, &exception);
8250 }
8251 } while (exception.retry);
05e9cfb4 8252out:
fca78d6d
BS		 8253 return err;
8254}
8255
8256static int
8257nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8258 struct nfs_fsinfo *info)
8259{
8260 int err;
8261 struct page *page;
367156d9 8262 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8263 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8264 struct nfs4_secinfo4 *secinfo;
8265 int i;
fca78d6d
BS		 8266
8267 page = alloc_page(GFP_KERNEL);
8268 if (!page) {
8269 err = -ENOMEM;
8270 goto out;
8271 }
8272
8273 flavors = page_address(page);
8274 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8275
8276 /*
8277 * Fall back on "guess and check" method if
8278 * the server doesn't support SECINFO_NO_NAME
8279 */
78b19bae 8280 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8281 err = nfs4_find_root_sec(server, fhandle, info);
8282 goto out_freepage;
8283 }
8284 if (err)
8285 goto out_freepage;
8286
58a8cf12
WAA		 8287 for (i = 0; i < flavors->num_flavors; i++) {
8288 secinfo = &flavors->flavors[i];
8289
8290 switch (secinfo->flavor) {
8291 case RPC_AUTH_NULL:
8292 case RPC_AUTH_UNIX:
8293 case RPC_AUTH_GSS:
8294 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8295 &secinfo->flavor_info);
8296 break;
8297 default:
8298 flavor = RPC_AUTH_MAXFLAVOR;
8299 break;
8300 }
8301
4d4b69dd
WAA		 8302 if (!nfs_auth_info_match(&server->auth_info, flavor))
8303 flavor = RPC_AUTH_MAXFLAVOR;
8304
58a8cf12
WAA		 8305 if (flavor != RPC_AUTH_MAXFLAVOR) {
8306 err = nfs4_lookup_root_sec(server, fhandle,
8307 info, flavor);
8308 if (!err)
8309 break;
8310 }
8311 }
8312
8313 if (flavor == RPC_AUTH_MAXFLAVOR)
8314 err = -EPERM;
fca78d6d
BS		 8315
8316out_freepage:
8317 put_page(page);
8318 if (err == -EACCES)
8319 return -EPERM;
8320out:
8321 return err;
8322}
1cab0652 8323
ab7cb0df
TM		 8324static int _nfs41_test_stateid(struct nfs_server *server,
8325 nfs4_stateid *stateid,
8326 struct rpc_cred *cred)
7d974794
BS		 8327{
8328 int status;
8329 struct nfs41_test_stateid_args args = {
1cab0652 8330 .stateid = stateid,
7d974794
BS		 8331 };
8332 struct nfs41_test_stateid_res res;
8333 struct rpc_message msg = {
8334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8335 .rpc_argp = &args,
8336 .rpc_resp = &res,
ab7cb0df 8337 .rpc_cred = cred,
7d974794 8338 };
3787d506
WAA		 8339 struct rpc_clnt *rpc_client = server->client;
8340
8341 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8342 &rpc_client, &msg);
1cab0652 8343
38527b15 8344 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8345 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8346 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8347 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8348 &args.seq_args, &res.seq_res);
38527b15
CL		 8349 if (status != NFS_OK) {
8350 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8351 return status;
38527b15
CL		 8352 }
8353 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8354 return -res.status;
7d974794
BS		 8355}
8356
38527b15
CL		 8357/**
8358 * nfs41_test_stateid - perform a TEST_STATEID operation
8359 *
8360 * @server: server / transport on which to perform the operation
8361 * @stateid: state ID to test
ab7cb0df 8362 * @cred: credential
38527b15
CL		 8363 *
8364 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8365 * Otherwise a negative NFS4ERR value is returned if the operation
8366 * failed or the state ID is not currently valid.
8367 */
ab7cb0df
TM		 8368static int nfs41_test_stateid(struct nfs_server *server,
8369 nfs4_stateid *stateid,
8370 struct rpc_cred *cred)
7d974794
BS		 8371{
8372 struct nfs4_exception exception = { };
8373 int err;
8374 do {
ab7cb0df 8375 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8376 if (err != -NFS4ERR_DELAY)
8377 break;
8378 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8379 } while (exception.retry);
8380 return err;
8381}
9aeda35f 8382
7c1d5fae
TM		 8383struct nfs_free_stateid_data {
8384 struct nfs_server *server;
8385 struct nfs41_free_stateid_args args;
9aeda35f 8386 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8387};
8388
8389static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8390{
8391 struct nfs_free_stateid_data *data = calldata;
8392 nfs41_setup_sequence(nfs4_get_session(data->server),
8393 &data->args.seq_args,
8394 &data->res.seq_res,
8395 task);
8396}
8397
8398static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8399{
8400 struct nfs_free_stateid_data *data = calldata;
8401
8402 nfs41_sequence_done(task, &data->res.seq_res);
8403
8404 switch (task->tk_status) {
8405 case -NFS4ERR_DELAY:
8478eaa1 8406 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8407 rpc_restart_call_prepare(task);
8408 }
8409}
8410
8411static void nfs41_free_stateid_release(void *calldata)
8412{
8413 kfree(calldata);
8414}
8415
17f26b12 8416static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8417 .rpc_call_prepare = nfs41_free_stateid_prepare,
8418 .rpc_call_done = nfs41_free_stateid_done,
8419 .rpc_release = nfs41_free_stateid_release,
8420};
8421
8422static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8423 nfs4_stateid *stateid,
ab7cb0df 8424 struct rpc_cred *cred,
7c1d5fae
TM		 8425 bool privileged)
8426{
9aeda35f
BS		 8427 struct rpc_message msg = {
8428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8429 .rpc_cred = cred,
9aeda35f 8430 };
7c1d5fae
TM		 8431 struct rpc_task_setup task_setup = {
8432 .rpc_client = server->client,
8433 .rpc_message = &msg,
8434 .callback_ops = &nfs41_free_stateid_ops,
8435 .flags = RPC_TASK_ASYNC,
8436 };
8437 struct nfs_free_stateid_data *data;
9aeda35f 8438
3787d506
WAA		 8439 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8440 &task_setup.rpc_client, &msg);
8441
38527b15 8442 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8443 data = kmalloc(sizeof(*data), GFP_NOFS);
8444 if (!data)
8445 return ERR_PTR(-ENOMEM);
8446 data->server = server;
8447 nfs4_stateid_copy(&data->args.stateid, stateid);
8448
8449 task_setup.callback_data = data;
8450
8451 msg.rpc_argp = &data->args;
8452 msg.rpc_resp = &data->res;
a9c92d6b 8453 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8454 if (privileged)
8455 nfs4_set_sequence_privileged(&data->args.seq_args);
8456
8457 return rpc_run_task(&task_setup);
9aeda35f
BS		 8458}
8459
38527b15
CL		 8460/**
8461 * nfs41_free_stateid - perform a FREE_STATEID operation
8462 *
8463 * @server: server / transport on which to perform the operation
8464 * @stateid: state ID to release
ab7cb0df 8465 * @cred: credential
38527b15
CL		 8466 *
8467 * Returns NFS_OK if the server freed "stateid". Otherwise a
8468 * negative NFS4ERR value is returned.
8469 */
ab7cb0df
TM		 8470static int nfs41_free_stateid(struct nfs_server *server,
8471 nfs4_stateid *stateid,
8472 struct rpc_cred *cred)
9aeda35f 8473{
7c1d5fae
TM		 8474 struct rpc_task *task;
8475 int ret;
8476
ab7cb0df 8477 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8478 if (IS_ERR(task))
8479 return PTR_ERR(task);
8480 ret = rpc_wait_for_completion_task(task);
8481 if (!ret)
8482 ret = task->tk_status;
8483 rpc_put_task(task);
8484 return ret;
9aeda35f 8485}
36281caa 8486
f1cdae87
JL		 8487static void
8488nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8489{
8490 struct rpc_task *task;
ab7cb0df 8491 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8492
ab7cb0df 8493 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8494 nfs4_free_lock_state(server, lsp);
8495 if (IS_ERR(task))
f1cdae87 8496 return;
c8b2d0bf 8497 rpc_put_task(task);
c8b2d0bf
TM		 8498}
8499
36281caa
TM		 8500static bool nfs41_match_stateid(const nfs4_stateid *s1,
8501 const nfs4_stateid *s2)
8502{
2d2f24ad 8503 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8504 return false;
8505
2d2f24ad 8506 if (s1->seqid == s2->seqid)
36281caa 8507 return true;
2d2f24ad 8508 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8509 return true;
8510
8511 return false;
8512}
8513
557134a3
AA		 8514#endif /* CONFIG_NFS_V4_1 */
8515
36281caa
TM		 8516static bool nfs4_match_stateid(const nfs4_stateid *s1,
8517 const nfs4_stateid *s2)
8518{
f597c537 8519 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8520}
8521
8522
17280175 8523static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8524 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8525 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8526 .recover_open = nfs4_open_reclaim,
8527 .recover_lock = nfs4_lock_reclaim,
591d71cb 8528 .establish_clid = nfs4_init_clientid,
05f4c350 8529 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8530};
8531
591d71cb 8532#if defined(CONFIG_NFS_V4_1)
17280175 8533static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8534 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8535 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8536 .recover_open = nfs4_open_reclaim,
8537 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8538 .establish_clid = nfs41_init_clientid,
fce5c838 8539 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8540 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8541};
8542#endif /* CONFIG_NFS_V4_1 */
8543
17280175 8544static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8545 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8546 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8547 .recover_open = nfs40_open_expired,
591d71cb
AA		 8548 .recover_lock = nfs4_lock_expired,
8549 .establish_clid = nfs4_init_clientid,
8550};
8551
8552#if defined(CONFIG_NFS_V4_1)
17280175 8553static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8554 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8555 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8556 .recover_open = nfs41_open_expired,
8557 .recover_lock = nfs41_lock_expired,
4d643d1d 8558 .establish_clid = nfs41_init_clientid,
1da177e4 8559};
591d71cb 8560#endif /* CONFIG_NFS_V4_1 */
1da177e4 8561
17280175 8562static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8563 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8564 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8565 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8566};
8567
8568#if defined(CONFIG_NFS_V4_1)
17280175 8569static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8570 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8571 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8572 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8573};
8574#endif
8575
ec011fe8 8576static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8577 .get_locations = _nfs40_proc_get_locations,
44c99933 8578 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8579};
8580
8581#if defined(CONFIG_NFS_V4_1)
8582static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8583 .get_locations = _nfs41_proc_get_locations,
44c99933 8584 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8585};
8586#endif /* CONFIG_NFS_V4_1 */
8587
97dc1359
TM		 8588static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8589 .minor_version = 0,
39c6daae
TM		 8590 .init_caps = NFS_CAP_READDIRPLUS
8591 | NFS_CAP_ATOMIC_OPEN
8592 | NFS_CAP_CHANGE_ATTR
8593 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8594 .init_client = nfs40_init_client,
8595 .shutdown_client = nfs40_shutdown_client,
36281caa 8596 .match_stateid = nfs4_match_stateid,
fca78d6d 8597 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8598 .free_lock_state = nfs4_release_lockowner,
63f5f796 8599 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8600 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8601 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8602 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8603 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8604 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8605};
8606
8607#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8608static struct nfs_seqid *
8609nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8610{
8611 return NULL;
8612}
8613
97dc1359
TM		 8614static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8615 .minor_version = 1,
39c6daae
TM		 8616 .init_caps = NFS_CAP_READDIRPLUS
8617 | NFS_CAP_ATOMIC_OPEN
8618 | NFS_CAP_CHANGE_ATTR
3b66486c 8619 | NFS_CAP_POSIX_LOCK
49f9a0fa 8620 | NFS_CAP_STATEID_NFSV41
e983120e 8621 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8622 .init_client = nfs41_init_client,
8623 .shutdown_client = nfs41_shutdown_client,
36281caa 8624 .match_stateid = nfs41_match_stateid,
fca78d6d 8625 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8626 .free_lock_state = nfs41_free_lock_state,
63f5f796 8627 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8628 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8629 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8630 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8631 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8632 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8633};
8634#endif
8635
42c2c424
SD		 8636#if defined(CONFIG_NFS_V4_2)
8637static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8638 .minor_version = 2,
7017310a
BS		 8639 .init_caps = NFS_CAP_READDIRPLUS
8640 | NFS_CAP_ATOMIC_OPEN
8641 | NFS_CAP_CHANGE_ATTR
8642 | NFS_CAP_POSIX_LOCK
8643 | NFS_CAP_STATEID_NFSV41
e983120e 8644 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8645 | NFS_CAP_ALLOCATE
624bd5b7 8646 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8647 | NFS_CAP_SEEK
8648 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8649 .init_client = nfs41_init_client,
8650 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8651 .match_stateid = nfs41_match_stateid,
8652 .find_root_sec = nfs41_find_root_sec,
7017310a 8653 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8654 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8655 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8656 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8657 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8658 .state_renewal_ops = &nfs41_state_renewal_ops,
8659};
8660#endif
8661
97dc1359
TM		 8662const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8663 [0] = &nfs_v4_0_minor_ops,
8664#if defined(CONFIG_NFS_V4_1)
8665 [1] = &nfs_v4_1_minor_ops,
8666#endif
42c2c424
SD		 8667#if defined(CONFIG_NFS_V4_2)
8668 [2] = &nfs_v4_2_minor_ops,
8669#endif
97dc1359
TM		 8670};
8671
17f26b12 8672static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8673 .create = nfs_create,
8674 .lookup = nfs_lookup,
8675 .atomic_open = nfs_atomic_open,
8676 .link = nfs_link,
8677 .unlink = nfs_unlink,
8678 .symlink = nfs_symlink,
8679 .mkdir = nfs_mkdir,
8680 .rmdir = nfs_rmdir,
8681 .mknod = nfs_mknod,
8682 .rename = nfs_rename,
8683 .permission = nfs_permission,
8684 .getattr = nfs_getattr,
8685 .setattr = nfs_setattr,
8686 .getxattr = generic_getxattr,
8687 .setxattr = generic_setxattr,
8688 .listxattr = generic_listxattr,
8689 .removexattr = generic_removexattr,
8690};
8691
92e1d5be 8692static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8693 .permission = nfs_permission,
8694 .getattr = nfs_getattr,
8695 .setattr = nfs_setattr,
64c2ce8b
AK		 8696 .getxattr = generic_getxattr,
8697 .setxattr = generic_setxattr,
8698 .listxattr = generic_listxattr,
8699 .removexattr = generic_removexattr,
6b3b5496
BF		 8700};
8701
509de811 8702const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8703 .version = 4, /* protocol version */
8704 .dentry_ops = &nfs4_dentry_operations,
8705 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8706 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8707 .file_ops = &nfs4_file_operations,
1da177e4 8708 .getroot = nfs4_proc_get_root,
281cad46 8709 .submount = nfs4_submount,
ff9099f2 8710 .try_mount = nfs4_try_mount,
1da177e4
LT		 8711 .getattr = nfs4_proc_getattr,
8712 .setattr = nfs4_proc_setattr,
8713 .lookup = nfs4_proc_lookup,
8714 .access = nfs4_proc_access,
8715 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8716 .create = nfs4_proc_create,
8717 .remove = nfs4_proc_remove,
8718 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8719 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8720 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8721 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8722 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8723 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8724 .link = nfs4_proc_link,
8725 .symlink = nfs4_proc_symlink,
8726 .mkdir = nfs4_proc_mkdir,
8727 .rmdir = nfs4_proc_remove,
8728 .readdir = nfs4_proc_readdir,
8729 .mknod = nfs4_proc_mknod,
8730 .statfs = nfs4_proc_statfs,
8731 .fsinfo = nfs4_proc_fsinfo,
8732 .pathconf = nfs4_proc_pathconf,
e9326dca 8733 .set_capabilities = nfs4_server_capabilities,
1da177e4 8734 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8735 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8736 .read_setup = nfs4_proc_read_setup,
ec06c096 8737 .read_done = nfs4_read_done,
1da177e4 8738 .write_setup = nfs4_proc_write_setup,
788e7a89 8739 .write_done = nfs4_write_done,
1da177e4 8740 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8741 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8742 .commit_done = nfs4_commit_done,
1da177e4 8743 .lock = nfs4_proc_lock,
e50a1c2e 8744 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8745 .close_context = nfs4_close_context,
2b484297 8746 .open_context = nfs4_atomic_open,
011e2a7f 8747 .have_delegation = nfs4_have_delegation,
57ec14c5 8748 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8749 .alloc_client = nfs4_alloc_client,
45a52a02 8750 .init_client = nfs4_init_client,
cdb7eced 8751 .free_client = nfs4_free_client,
1179acc6
BS		 8752 .create_server = nfs4_create_server,
8753 .clone_server = nfs_clone_server,
1da177e4
LT		 8754};
8755
64c2ce8b
AK		 8756static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8757 .prefix = XATTR_NAME_NFSV4_ACL,
8758 .list = nfs4_xattr_list_nfs4_acl,
8759 .get = nfs4_xattr_get_nfs4_acl,
8760 .set = nfs4_xattr_set_nfs4_acl,
8761};
8762
8763const struct xattr_handler *nfs4_xattr_handlers[] = {
8764 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8765#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8766 &nfs4_xattr_nfs4_label_handler,
8767#endif
64c2ce8b
AK		 8768 NULL
8769};
8770
1da177e4
LT		 8771/*
8772 * Local variables:
8773 * c-basic-offset: 8
8774 * End:
8775 */
Linux 6.x block layer and io_uring tree(s)