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NFS: Enable nfs4_setup_sequence() for DELEGRETURN
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315
BS		 154 case -NFS4ERR_WRONGSEC:
155 return -EPERM;
3ddeb7c5
TM		 156 case -NFS4ERR_BADOWNER:
157 case -NFS4ERR_BADNAME:
158 return -EINVAL;
fb13bfa7
TM		 159 case -NFS4ERR_SHARE_DENIED:
160 return -EACCES;
f25efd85
SD		 161 case -NFS4ERR_MINOR_VERS_MISMATCH:
162 return -EPROTONOSUPPORT;
6168f62c
WAA		 163 case -NFS4ERR_ACCESS:
164 return -EACCES;
6e3cf241
TM		 165 case -NFS4ERR_FILE_OPEN:
166 return -EBUSY;
52567b03 167 default:
1da177e4 168 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 169 __func__, -err);
52567b03 170 break;
1da177e4 171 }
52567b03 172 return -EIO;
1da177e4
LT		 173}
174
175/*
176 * This is our standard bitmap for GETATTR requests.
177 */
1549210f 178const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 179 FATTR4_WORD0_TYPE
180 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_SIZE
182 | FATTR4_WORD0_FSID
183 | FATTR4_WORD0_FILEID,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 192 | FATTR4_WORD1_TIME_MODIFY,
193#ifdef CONFIG_NFS_V4_SECURITY_LABEL
194 FATTR4_WORD2_SECURITY_LABEL
195#endif
1da177e4
LT		 196};
197
1549210f
TM		 198static const u32 nfs4_pnfs_open_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY,
213 FATTR4_WORD2_MDSTHRESHOLD
214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 244};
245
a09df2ca 246const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 247 FATTR4_WORD0_TYPE
248 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_SIZE
250 | FATTR4_WORD0_FSID
251 | FATTR4_WORD0_FILEID
252 | FATTR4_WORD0_FS_LOCATIONS,
253 FATTR4_WORD1_MODE
254 | FATTR4_WORD1_NUMLINKS
255 | FATTR4_WORD1_OWNER
256 | FATTR4_WORD1_OWNER_GROUP
257 | FATTR4_WORD1_RAWDEV
258 | FATTR4_WORD1_SPACE_USED
259 | FATTR4_WORD1_TIME_ACCESS
260 | FATTR4_WORD1_TIME_METADATA
261 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 262 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 263};
264
bc4785cd 265static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 266 struct nfs4_readdir_arg *readdir)
267{
0dbb4c67 268 __be32 *start, *p;
1da177e4 269
1da177e4 270 if (cookie > 2) {
b7ef1956 271 readdir->cookie = cookie;
1da177e4
LT		 272 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 return;
274 }
275
276 readdir->cookie = 0;
277 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 if (cookie == 2)
279 return;
280
281 /*
282 * NFSv4 servers do not return entries for '.' and '..'
283 * Therefore, we fake these entries here. We let '.'
284 * have cookie 0 and '..' have cookie 1. Note that
285 * when talking to the server, we always send cookie 0
286 * instead of 1 or 2.
287 */
2b86ce2d 288 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 289
290 if (cookie == 0) {
291 *p++ = xdr_one; /* next */
292 *p++ = xdr_zero; /* cookie, first word */
293 *p++ = xdr_one; /* cookie, second word */
294 *p++ = xdr_one; /* entry len */
295 memcpy(p, ".\0\0\0", 4); /* entry */
296 p++;
297 *p++ = xdr_one; /* bitmap length */
298 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
299 *p++ = htonl(8); /* attribute buffer length */
4e769b93 300 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 301 }
302
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_two; /* cookie, second word */
306 *p++ = xdr_two; /* entry len */
307 memcpy(p, "..\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
4e769b93 312 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 313
314 readdir->pgbase = (char *)p - (char *)start;
315 readdir->count -= readdir->pgbase;
2b86ce2d 316 kunmap_atomic(start);
1da177e4
LT		 317}
318
65de872e
TM		 319static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
320{
321 int res = 0;
322
323 might_sleep();
324
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 329 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 330 if (fatal_signal_pending(current))
331 res = -ERESTARTSYS;
332 *timeout <<= 1;
333 return res;
334}
335
336/* This is the error handling routine for processes that are allowed
337 * to sleep.
338 */
b064eca2 339static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 340{
341 struct nfs_client *clp = server->nfs_client;
9e33bed5 342 struct nfs4_state *state = exception->state;
3114ea7a 343 struct inode *inode = exception->inode;
65de872e
TM		 344 int ret = errorcode;
345
346 exception->retry = 0;
347 switch(errorcode) {
348 case 0:
349 return 0;
3114ea7a 350 case -NFS4ERR_OPENMODE:
011e2a7f 351 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 352 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 353 exception->retry = 1;
354 return 0;
355 }
356 if (state == NULL)
357 break;
5d422301
TM		 358 ret = nfs4_schedule_stateid_recovery(server, state);
359 if (ret < 0)
360 break;
3114ea7a 361 goto wait_on_recovery;
a1d0b5ee 362 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 365 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
366 nfs_remove_bad_delegation(inode);
367 exception->retry = 1;
368 break;
369 }
9e33bed5
TM		 370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
0400a6b0 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
03391693 386#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 387 case -NFS4ERR_BADSESSION:
388 case -NFS4ERR_BADSLOT:
389 case -NFS4ERR_BAD_HIGH_SLOT:
390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
391 case -NFS4ERR_DEADSESSION:
392 case -NFS4ERR_SEQ_FALSE_RETRY:
393 case -NFS4ERR_SEQ_MISORDERED:
394 dprintk("%s ERROR: %d Reset session\n", __func__,
395 errorcode);
9f594791 396 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 397 goto wait_on_recovery;
03391693 398#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 399 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 400 if (exception->timeout > HZ) {
401 /* We have retried a decent amount, time to
402 * fail
403 */
404 ret = -EBUSY;
405 break;
406 }
65de872e
TM		 407 case -NFS4ERR_GRACE:
408 case -NFS4ERR_DELAY:
409 ret = nfs4_delay(server->client, &exception->timeout);
410 if (ret != 0)
411 break;
a8a4ae3a 412 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 413 case -NFS4ERR_OLD_STATEID:
414 exception->retry = 1;
b064eca2
TM		 415 break;
416 case -NFS4ERR_BADOWNER:
417 /* The following works around a Linux server bug! */
418 case -NFS4ERR_BADNAME:
419 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
420 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
421 exception->retry = 1;
422 printk(KERN_WARNING "NFS: v4 server %s "
423 "does not accept raw "
424 "uid/gids. "
425 "Reenabling the idmapper.\n",
426 server->nfs_client->cl_hostname);
427 }
65de872e
TM		 428 }
429 /* We failed to handle the error */
430 return nfs4_map_errors(ret);
0400a6b0 431wait_on_recovery:
a2c0b9e2
TM		 432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret == 0)
434 exception->retry = 1;
435 return ret;
65de872e
TM		 436}
437
a5250def
WAA		 438/*
439 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
440 * or 'false' otherwise.
441 */
442static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
443{
444 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
445
446 if (flavor == RPC_AUTH_GSS_KRB5I ||
447 flavor == RPC_AUTH_GSS_KRB5P)
448 return true;
449
450 return false;
451}
65de872e 452
452e9352 453static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 454{
1da177e4
LT		 455 spin_lock(&clp->cl_lock);
456 if (time_before(clp->cl_last_renewal,timestamp))
457 clp->cl_last_renewal = timestamp;
458 spin_unlock(&clp->cl_lock);
459}
460
452e9352
TM		 461static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
462{
463 do_renew_lease(server->nfs_client, timestamp);
464}
465
2a3eb2b9
CL		 466struct nfs4_call_sync_data {
467 const struct nfs_server *seq_server;
468 struct nfs4_sequence_args *seq_args;
469 struct nfs4_sequence_res *seq_res;
470};
471
a9c92d6b
CL		 472static void nfs4_init_sequence(struct nfs4_sequence_args *args,
473 struct nfs4_sequence_res *res, int cache_reply)
474{
475 args->sa_slot = NULL;
476 args->sa_cache_this = cache_reply;
477 args->sa_privileged = 0;
478
479 res->sr_slot = NULL;
480}
481
482static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
483{
484 args->sa_privileged = 1;
485}
486
3bd2384a
CL		 487static int nfs40_setup_sequence(const struct nfs_server *server,
488 struct nfs4_sequence_args *args,
489 struct nfs4_sequence_res *res,
490 struct rpc_task *task)
491{
492 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
493 struct nfs4_slot *slot;
494
495 /* slot already allocated? */
496 if (res->sr_slot != NULL)
497 goto out_start;
498
499 spin_lock(&tbl->slot_tbl_lock);
500 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
501 goto out_sleep;
502
503 slot = nfs4_alloc_slot(tbl);
504 if (IS_ERR(slot)) {
505 if (slot == ERR_PTR(-ENOMEM))
506 task->tk_timeout = HZ >> 2;
507 goto out_sleep;
508 }
509 spin_unlock(&tbl->slot_tbl_lock);
510
511 args->sa_slot = slot;
512 res->sr_slot = slot;
513
514out_start:
515 rpc_call_start(task);
516 return 0;
517
518out_sleep:
519 if (args->sa_privileged)
520 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
521 NULL, RPC_PRIORITY_PRIVILEGED);
522 else
523 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
524 spin_unlock(&tbl->slot_tbl_lock);
525 return -EAGAIN;
526}
527
528static int nfs40_sequence_done(struct rpc_task *task,
529 struct nfs4_sequence_res *res)
530{
531 struct nfs4_slot *slot = res->sr_slot;
532 struct nfs4_slot_table *tbl;
533
534 if (!RPC_WAS_SENT(task))
535 goto out;
536
537 tbl = slot->table;
538 spin_lock(&tbl->slot_tbl_lock);
539 if (!nfs41_wake_and_assign_slot(tbl, slot))
540 nfs4_free_slot(tbl, slot);
541 spin_unlock(&tbl->slot_tbl_lock);
542
543 res->sr_slot = NULL;
544out:
545 return 1;
546}
547
cccef3b9
AA		 548#if defined(CONFIG_NFS_V4_1)
549
d185a334 550static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 551{
e3725ec0 552 struct nfs4_session *session;
13615871 553 struct nfs4_slot_table *tbl;
c10e4498 554 bool send_new_highest_used_slotid = false;
13615871 555
dfb4f309 556 if (!res->sr_slot) {
13615871
AA		 557 /* just wake up the next guy waiting since
558 * we may have not consumed a slot after all */
691daf3b 559 dprintk("%s: No slot\n", __func__);
35dc1d74 560 return;
13615871 561 }
e3725ec0
TM		 562 tbl = res->sr_slot->table;
563 session = tbl->session;
ea028ac9 564
35dc1d74 565 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 566 /* Be nice to the server: try to ensure that the last transmitted
567 * value for highest_user_slotid <= target_highest_slotid
568 */
569 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
570 send_new_highest_used_slotid = true;
571
b75ad4cd
TM		 572 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
573 send_new_highest_used_slotid = false;
574 goto out_unlock;
575 }
f4af6e2a 576 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 577
578 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
579 send_new_highest_used_slotid = false;
b75ad4cd 580out_unlock:
35dc1d74 581 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 582 res->sr_slot = NULL;
c10e4498
TM		 583 if (send_new_highest_used_slotid)
584 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 585}
586
14516c3a 587static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 588{
e3725ec0 589 struct nfs4_session *session;
933602e3 590 struct nfs4_slot *slot;
14516c3a 591 struct nfs_client *clp;
ac20d163 592 bool interrupted = false;
85563073 593 int ret = 1;
b0df806c 594
468f8613
BS		 595 /* don't increment the sequence number if the task wasn't sent */
596 if (!RPC_WAS_SENT(task))
b0df806c
AA		 597 goto out;
598
933602e3 599 slot = res->sr_slot;
e3725ec0 600 session = slot->table->session;
933602e3 601
ac20d163
TM		 602 if (slot->interrupted) {
603 slot->interrupted = 0;
604 interrupted = true;
605 }
606
2f92ae34 607 trace_nfs4_sequence_done(session, res);
691daf3b 608 /* Check the SEQUENCE operation status */
14516c3a
TM		 609 switch (res->sr_status) {
610 case 0:
b0df806c 611 /* Update the slot's sequence and clientid lease timer */
933602e3 612 ++slot->seq_nr;
e3725ec0 613 clp = session->clp;
8e63b6a8 614 do_renew_lease(clp, res->sr_timestamp);
0629e370 615 /* Check sequence flags */
b4410c2f
TM		 616 if (res->sr_status_flags != 0)
617 nfs4_schedule_lease_recovery(clp);
464ee9f9 618 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 619 break;
ac20d163
TM		 620 case 1:
621 /*
622 * sr_status remains 1 if an RPC level error occurred.
623 * The server may or may not have processed the sequence
624 * operation..
625 * Mark the slot as having hosted an interrupted RPC call.
626 */
627 slot->interrupted = 1;
628 goto out;
14516c3a
TM		 629 case -NFS4ERR_DELAY:
630 /* The server detected a resend of the RPC call and
631 * returned NFS4ERR_DELAY as per Section 2.10.6.2
632 * of RFC5661.
633 */
df2fabff 634 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 635 __func__,
df2fabff 636 slot->slot_nr,
933602e3 637 slot->seq_nr);
14516c3a 638 goto out_retry;
85563073
TM		 639 case -NFS4ERR_BADSLOT:
640 /*
641 * The slot id we used was probably retired. Try again
642 * using a different slot id.
643 */
e8794440
TM		 644 goto retry_nowait;
645 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 646 /*
647 * Was the last operation on this sequence interrupted?
648 * If so, retry after bumping the sequence number.
649 */
650 if (interrupted) {
651 ++slot->seq_nr;
652 goto retry_nowait;
653 }
e8794440
TM		 654 /*
655 * Could this slot have been previously retired?
656 * If so, then the server may be expecting seq_nr = 1!
657 */
8e63b6a8
TM		 658 if (slot->seq_nr != 1) {
659 slot->seq_nr = 1;
660 goto retry_nowait;
661 }
662 break;
e8794440
TM		 663 case -NFS4ERR_SEQ_FALSE_RETRY:
664 ++slot->seq_nr;
665 goto retry_nowait;
14516c3a
TM		 666 default:
667 /* Just update the slot sequence no. */
933602e3 668 ++slot->seq_nr;
b0df806c
AA		 669 }
670out:
671 /* The session may be reset by one of the error handlers. */
672 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 673 nfs41_sequence_free_slot(res);
85563073 674 return ret;
e8794440
TM		 675retry_nowait:
676 if (rpc_restart_call_prepare(task)) {
677 task->tk_status = 0;
678 ret = 0;
679 }
680 goto out;
14516c3a 681out_retry:
d05dd4e9 682 if (!rpc_restart_call(task))
14516c3a
TM		 683 goto out;
684 rpc_delay(task, NFS4_POLL_RETRY_MAX);
685 return 0;
b0df806c
AA		 686}
687
14516c3a
TM		 688static int nfs4_sequence_done(struct rpc_task *task,
689 struct nfs4_sequence_res *res)
df896455 690{
e3725ec0 691 if (res->sr_slot == NULL)
14516c3a 692 return 1;
3bd2384a
CL		 693 if (!res->sr_slot->table->session)
694 return nfs40_sequence_done(task, res);
14516c3a 695 return nfs41_sequence_done(task, res);
df896455
TM		 696}
697
dc70d7b3 698int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 699 struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res,
ce5039c1
AA		 701 struct rpc_task *task)
702{
fbcd4abc
AA		 703 struct nfs4_slot *slot;
704 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 705
706 dprintk("--> %s\n", __func__);
ce5039c1 707 /* slot already allocated? */
dfb4f309 708 if (res->sr_slot != NULL)
d9afbd1b 709 goto out_success;
ce5039c1 710
fbcd4abc
AA		 711 tbl = &session->fc_slot_table;
712
69d206b5
TM		 713 task->tk_timeout = 0;
714
fbcd4abc 715 spin_lock(&tbl->slot_tbl_lock);
774d5f14 716 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 717 !args->sa_privileged) {
0b1c8fc4 718 /* The state manager will wait until the slot table is empty */
0b1c8fc4 719 dprintk("%s session is draining\n", __func__);
7b939a3f 720 goto out_sleep;
689cf5c1
AB		 721 }
722
2dc03b7f 723 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 724 if (IS_ERR(slot)) {
725 /* If out of memory, try again in 1/4 second */
726 if (slot == ERR_PTR(-ENOMEM))
727 task->tk_timeout = HZ >> 2;
fbcd4abc 728 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 729 goto out_sleep;
fbcd4abc
AA		 730 }
731 spin_unlock(&tbl->slot_tbl_lock);
732
2b2fa717 733 args->sa_slot = slot;
fbcd4abc 734
e8d92382 735 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 736 slot->slot_nr, slot->seq_nr);
fbcd4abc 737
dfb4f309 738 res->sr_slot = slot;
8e63b6a8 739 res->sr_timestamp = jiffies;
2a6e26cd 740 res->sr_status_flags = 0;
fbcd4abc
AA		 741 /*
742 * sr_status is only set in decode_sequence, and so will remain
743 * set to 1 if an rpc level failure occurs.
744 */
745 res->sr_status = 1;
2f92ae34 746 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 747out_success:
748 rpc_call_start(task);
ce5039c1 749 return 0;
7b939a3f 750out_sleep:
8fe72bac
TM		 751 /* Privileged tasks are queued with top priority */
752 if (args->sa_privileged)
1e1093c7
TM		 753 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
754 NULL, RPC_PRIORITY_PRIVILEGED);
755 else
756 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 757 spin_unlock(&tbl->slot_tbl_lock);
758 return -EAGAIN;
ce5039c1 759}
dc70d7b3 760EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 761
5a580e0a
CL		 762static int nfs4_setup_sequence(const struct nfs_server *server,
763 struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res,
765 struct rpc_task *task)
ce5039c1 766{
035168ab 767 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 768 int ret = 0;
769
3bd2384a
CL		 770 if (!session)
771 return nfs40_setup_sequence(server, args, res, task);
035168ab 772
e8d92382 773 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 774 __func__, session->clp, session, res->sr_slot ?
e8d92382 775 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 776
9d12b216 777 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 778
ce5039c1
AA		 779 dprintk("<-- %s status=%d\n", __func__, ret);
780 return ret;
781}
782
ce5039c1
AA		 783static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
784{
2a3eb2b9 785 struct nfs4_call_sync_data *data = calldata;
6ba7db34 786 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 787
035168ab
TM		 788 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
789
d9afbd1b 790 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 791}
792
69ab40c4
AA		 793static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
794{
2a3eb2b9 795 struct nfs4_call_sync_data *data = calldata;
69ab40c4 796
14516c3a 797 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 798}
799
17280175 800static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 801 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 802 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 803};
804
3bd2384a
CL		 805#else /* !CONFIG_NFS_V4_1 */
806
9915ea7e
CL		 807static int nfs4_setup_sequence(const struct nfs_server *server,
808 struct nfs4_sequence_args *args,
809 struct nfs4_sequence_res *res,
810 struct rpc_task *task)
811{
3bd2384a 812 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 813}
814
815static int nfs4_sequence_done(struct rpc_task *task,
816 struct nfs4_sequence_res *res)
817{
3bd2384a 818 return nfs40_sequence_done(task, res);
9915ea7e 819}
3bd2384a
CL		 820
821#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 822
823static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
824{
825 struct nfs4_call_sync_data *data = calldata;
826 nfs4_setup_sequence(data->seq_server,
827 data->seq_args, data->seq_res, task);
828}
829
830static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
831{
832 struct nfs4_call_sync_data *data = calldata;
833 nfs4_sequence_done(task, data->seq_res);
834}
835
836static const struct rpc_call_ops nfs40_call_sync_ops = {
837 .rpc_call_prepare = nfs40_call_sync_prepare,
838 .rpc_call_done = nfs40_call_sync_done,
839};
840
7c513058
BS		 841static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
842 struct nfs_server *server,
ce5039c1
AA		 843 struct rpc_message *msg,
844 struct nfs4_sequence_args *args,
8fe72bac 845 struct nfs4_sequence_res *res)
ce5039c1
AA		 846{
847 int ret;
848 struct rpc_task *task;
9915ea7e 849 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 850 struct nfs4_call_sync_data data = {
035168ab 851 .seq_server = server,
ce5039c1
AA		 852 .seq_args = args,
853 .seq_res = res,
ce5039c1
AA		 854 };
855 struct rpc_task_setup task_setup = {
7c513058 856 .rpc_client = clnt,
ce5039c1 857 .rpc_message = msg,
9915ea7e 858 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 859 .callback_data = &data
860 };
861
ce5039c1
AA		 862 task = rpc_run_task(&task_setup);
863 if (IS_ERR(task))
864 ret = PTR_ERR(task);
865 else {
866 ret = task->tk_status;
867 rpc_put_task(task);
868 }
869 return ret;
870}
871
fd0c0953 872static
7c513058
BS		 873int nfs4_call_sync(struct rpc_clnt *clnt,
874 struct nfs_server *server,
e73b83f2
BS		 875 struct rpc_message *msg,
876 struct nfs4_sequence_args *args,
877 struct nfs4_sequence_res *res,
878 int cache_reply)
879{
a9c92d6b 880 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 881 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 882}
cccef3b9 883
38478b24 884static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 885{
38478b24 886 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 887
38478b24 888 spin_lock(&dir->i_lock);
359d7d1c 889 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 890 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 891 nfs_force_lookup_revalidate(dir);
a9a4a87a 892 dir->i_version = cinfo->after;
de242c0b 893 nfs_fscache_invalidate(dir);
38478b24 894 spin_unlock(&dir->i_lock);
1da177e4
LT		 895}
896
e56e0b78 897struct nfs4_opendata {
c6d00e63 898 struct kref kref;
e56e0b78
TM		 899 struct nfs_openargs o_arg;
900 struct nfs_openres o_res;
cdd4e68b
TM		 901 struct nfs_open_confirmargs c_arg;
902 struct nfs_open_confirmres c_res;
6926afd1
TM		 903 struct nfs4_string owner_name;
904 struct nfs4_string group_name;
e56e0b78 905 struct nfs_fattr f_attr;
1775fd3e 906 struct nfs4_label *f_label;
e56e0b78 907 struct dentry *dir;
82a2c1b7 908 struct dentry *dentry;
e56e0b78 909 struct nfs4_state_owner *owner;
aac00a8d 910 struct nfs4_state *state;
e56e0b78 911 struct iattr attrs;
26e976a8 912 unsigned long timestamp;
3e309914 913 unsigned int rpc_done : 1;
bdeca1b7 914 unsigned int is_recover : 1;
24ac23ab
TM		 915 int rpc_status;
916 int cancelled;
e56e0b78
TM		 917};
918
49f9a0fa
TM		 919static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
920 int err, struct nfs4_exception *exception)
921{
922 if (err != -EINVAL)
923 return false;
924 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
925 return false;
926 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
927 exception->retry = 1;
928 return true;
929}
930
931static enum open_claim_type4
932nfs4_map_atomic_open_claim(struct nfs_server *server,
933 enum open_claim_type4 claim)
934{
935 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
936 return claim;
937 switch (claim) {
938 default:
939 return claim;
940 case NFS4_OPEN_CLAIM_FH:
941 return NFS4_OPEN_CLAIM_NULL;
942 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
943 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
944 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
945 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
946 }
947}
2ced46c2
TM		 948
949static void nfs4_init_opendata_res(struct nfs4_opendata *p)
950{
951 p->o_res.f_attr = &p->f_attr;
1775fd3e 952 p->o_res.f_label = p->f_label;
c1d51931
TM		 953 p->o_res.seqid = p->o_arg.seqid;
954 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 955 p->o_res.server = p->o_arg.server;
5f657530 956 p->o_res.access_request = p->o_arg.access;
2ced46c2 957 nfs_fattr_init(&p->f_attr);
6926afd1 958 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 959}
960
82a2c1b7 961static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 962 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 963 const struct iattr *attrs,
1775fd3e 964 struct nfs4_label *label,
4a1c0893 965 enum open_claim_type4 claim,
8535b2be 966 gfp_t gfp_mask)
e56e0b78 967{
82a2c1b7 968 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 969 struct inode *dir = parent->d_inode;
970 struct nfs_server *server = NFS_SERVER(dir);
971 struct nfs4_opendata *p;
972
8535b2be 973 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 974 if (p == NULL)
975 goto err;
14c43f76
DQ		 976
977 p->f_label = nfs4_label_alloc(server, gfp_mask);
978 if (IS_ERR(p->f_label))
979 goto err_free_p;
980
8535b2be 981 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 982 if (p->o_arg.seqid == NULL)
14c43f76 983 goto err_free_label;
82a2c1b7
AV		 984 nfs_sb_active(dentry->d_sb);
985 p->dentry = dget(dentry);
e56e0b78
TM		 986 p->dir = parent;
987 p->owner = sp;
988 atomic_inc(&sp->so_count);
dc0b027d
TM		 989 p->o_arg.open_flags = flags;
990 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 991 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
992 * will return permission denied for all bits until close */
993 if (!(flags & O_EXCL)) {
994 /* ask server to check for all possible rights as results
995 * are cached */
996 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
997 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 998 }
7539bbab 999 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1000 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1001 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1002 p->o_arg.name = &dentry->d_name;
e56e0b78 1003 p->o_arg.server = server;
aa9c2669 1004 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1005 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1006 p->o_arg.label = label;
49f9a0fa
TM		 1007 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1008 switch (p->o_arg.claim) {
4a1c0893
TM		 1009 case NFS4_OPEN_CLAIM_NULL:
1010 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1011 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1012 p->o_arg.fh = NFS_FH(dir);
1013 break;
1014 case NFS4_OPEN_CLAIM_PREVIOUS:
1015 case NFS4_OPEN_CLAIM_FH:
1016 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1017 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1018 p->o_arg.fh = NFS_FH(dentry->d_inode);
1019 }
536e43d1 1020 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1021 __u32 verf[2];
d77d76ff 1022
e56e0b78
TM		 1023 p->o_arg.u.attrs = &p->attrs;
1024 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1025
1026 verf[0] = jiffies;
1027 verf[1] = current->pid;
1028 memcpy(p->o_arg.u.verifier.data, verf,
1029 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1030 }
cdd4e68b
TM		 1031 p->c_arg.fh = &p->o_res.fh;
1032 p->c_arg.stateid = &p->o_res.stateid;
1033 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1034 nfs4_init_opendata_res(p);
c6d00e63 1035 kref_init(&p->kref);
e56e0b78 1036 return p;
14c43f76
DQ		 1037
1038err_free_label:
1039 nfs4_label_free(p->f_label);
1040err_free_p:
e56e0b78
TM		 1041 kfree(p);
1042err:
1043 dput(parent);
1044 return NULL;
1045}
1046
c6d00e63 1047static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1048{
c6d00e63
TM		 1049 struct nfs4_opendata *p = container_of(kref,
1050 struct nfs4_opendata, kref);
82a2c1b7 1051 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1052
1053 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1054 if (p->state != NULL)
1055 nfs4_put_open_state(p->state);
c6d00e63 1056 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1057
1058 nfs4_label_free(p->f_label);
1059
c6d00e63 1060 dput(p->dir);
82a2c1b7
AV		 1061 dput(p->dentry);
1062 nfs_sb_deactive(sb);
6926afd1 1063 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1064 kfree(p);
1065}
1066
1067static void nfs4_opendata_put(struct nfs4_opendata *p)
1068{
1069 if (p != NULL)
1070 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1071}
1072
06f814a3
TM		 1073static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1074{
06f814a3
TM		 1075 int ret;
1076
06f814a3 1077 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1078 return ret;
1079}
1080
dc0b027d 1081static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1082{
1083 int ret = 0;
dc0b027d 1084
536e43d1 1085 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1086 goto out;
1087 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1088 case FMODE_READ:
88069f77
TM		 1089 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1090 && state->n_rdonly != 0;
6ee41268
TM		 1091 break;
1092 case FMODE_WRITE:
88069f77
TM		 1093 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1094 && state->n_wronly != 0;
6ee41268
TM		 1095 break;
1096 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1097 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1098 && state->n_rdwr != 0;
6ee41268 1099 }
dc0b027d 1100out:
6ee41268
TM		 1101 return ret;
1102}
1103
dc0b027d 1104static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1105{
652f89f6
TM		 1106 if (delegation == NULL)
1107 return 0;
dc0b027d 1108 if ((delegation->type & fmode) != fmode)
aac00a8d 1109 return 0;
15c831bf 1110 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1111 return 0;
d25be546
TM		 1112 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1113 return 0;
b7391f44 1114 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1115 return 1;
1116}
1117
dc0b027d 1118static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1119{
dc0b027d 1120 switch (fmode) {
e7616923
TM		 1121 case FMODE_WRITE:
1122 state->n_wronly++;
1123 break;
1124 case FMODE_READ:
1125 state->n_rdonly++;
1126 break;
1127 case FMODE_READ|FMODE_WRITE:
1128 state->n_rdwr++;
1129 }
dc0b027d 1130 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1131}
1132
dc0b027d 1133static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1134{
1135 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1136 nfs4_stateid_copy(&state->stateid, stateid);
1137 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1138 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1139 switch (fmode) {
003707c7
TM		 1140 case FMODE_READ:
1141 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1142 break;
1143 case FMODE_WRITE:
1144 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1145 break;
1146 case FMODE_READ|FMODE_WRITE:
1147 set_bit(NFS_O_RDWR_STATE, &state->flags);
1148 }
e7616923
TM		 1149}
1150
dc0b027d 1151static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1152{
8bda4e4c 1153 write_seqlock(&state->seqlock);
dc0b027d 1154 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1155 write_sequnlock(&state->seqlock);
003707c7
TM		 1156}
1157
dc0b027d 1158static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1159{
8bda4e4c
TM		 1160 /*
1161 * Protect the call to nfs4_state_set_mode_locked and
1162 * serialise the stateid update
1163 */
1164 write_seqlock(&state->seqlock);
003707c7 1165 if (deleg_stateid != NULL) {
f597c537 1166 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1167 set_bit(NFS_DELEGATED_STATE, &state->flags);
1168 }
1169 if (open_stateid != NULL)
dc0b027d 1170 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1171 write_sequnlock(&state->seqlock);
1172 spin_lock(&state->owner->so_lock);
dc0b027d 1173 update_open_stateflags(state, fmode);
ec073428 1174 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1175}
1176
dc0b027d 1177static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1178{
1179 struct nfs_inode *nfsi = NFS_I(state->inode);
1180 struct nfs_delegation *deleg_cur;
1181 int ret = 0;
1182
dc0b027d 1183 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1184
1185 rcu_read_lock();
1186 deleg_cur = rcu_dereference(nfsi->delegation);
1187 if (deleg_cur == NULL)
1188 goto no_delegation;
1189
1190 spin_lock(&deleg_cur->lock);
17f26b12 1191 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1192 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1193 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1194 goto no_delegation_unlock;
1195
1196 if (delegation == NULL)
1197 delegation = &deleg_cur->stateid;
f597c537 1198 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1199 goto no_delegation_unlock;
1200
b7391f44 1201 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1202 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1203 ret = 1;
1204no_delegation_unlock:
1205 spin_unlock(&deleg_cur->lock);
1206no_delegation:
1207 rcu_read_unlock();
1208
1209 if (!ret && open_stateid != NULL) {
dc0b027d 1210 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1211 ret = 1;
1212 }
1213
1214 return ret;
1215}
1216
1217
dc0b027d 1218static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1219{
1220 struct nfs_delegation *delegation;
1221
1222 rcu_read_lock();
1223 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1224 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1225 rcu_read_unlock();
1226 return;
1227 }
1228 rcu_read_unlock();
57ec14c5 1229 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1230}
1231
6ee41268 1232static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1233{
1234 struct nfs4_state *state = opendata->state;
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_delegation *delegation;
f448badd 1237 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1238 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1239 nfs4_stateid stateid;
1240 int ret = -EAGAIN;
1241
aac00a8d 1242 for (;;) {
dc0b027d 1243 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1244 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1245 if (can_open_cached(state, fmode, open_mode)) {
1246 update_open_stateflags(state, fmode);
6ee41268 1247 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1248 goto out_return_state;
1249 }
1250 spin_unlock(&state->owner->so_lock);
1251 }
34310430
TM		 1252 rcu_read_lock();
1253 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1254 if (!can_open_delegated(delegation, fmode)) {
34310430 1255 rcu_read_unlock();
aac00a8d 1256 break;
34310430 1257 }
aac00a8d 1258 /* Save the delegation */
f597c537 1259 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1260 rcu_read_unlock();
fa332941 1261 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1262 if (!opendata->is_recover) {
1263 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1264 if (ret != 0)
1265 goto out;
1266 }
aac00a8d 1267 ret = -EAGAIN;
34310430
TM		 1268
1269 /* Try to update the stateid using the delegation */
dc0b027d 1270 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1271 goto out_return_state;
aac00a8d 1272 }
aac00a8d
TM		 1273out:
1274 return ERR_PTR(ret);
1275out_return_state:
1276 atomic_inc(&state->count);
1277 return state;
1278}
1279
e23008ec
AA		 1280static void
1281nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1282{
1283 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1284 struct nfs_delegation *delegation;
1285 int delegation_flags = 0;
1286
1287 rcu_read_lock();
1288 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1289 if (delegation)
1290 delegation_flags = delegation->flags;
1291 rcu_read_unlock();
1292 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1293 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1294 "returning a delegation for "
1295 "OPEN(CLAIM_DELEGATE_CUR)\n",
1296 clp->cl_hostname);
1297 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1298 nfs_inode_set_delegation(state->inode,
1299 data->owner->so_cred,
1300 &data->o_res);
1301 else
1302 nfs_inode_reclaim_delegation(state->inode,
1303 data->owner->so_cred,
1304 &data->o_res);
1305}
1306
1307/*
1308 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1309 * and update the nfs4_state.
1310 */
1311static struct nfs4_state *
1312_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1313{
1314 struct inode *inode = data->state->inode;
1315 struct nfs4_state *state = data->state;
1316 int ret;
1317
1318 if (!data->rpc_done) {
1319 ret = data->rpc_status;
1320 goto err;
1321 }
1322
1323 ret = -ESTALE;
1324 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1325 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1326 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1327 goto err;
1328
1329 ret = -ENOMEM;
1330 state = nfs4_get_open_state(inode, data->owner);
1331 if (state == NULL)
1332 goto err;
1333
1334 ret = nfs_refresh_inode(inode, &data->f_attr);
1335 if (ret)
1336 goto err;
1337
aa9c2669
DQ		 1338 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1339
e23008ec
AA		 1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
1342 update_open_stateid(state, &data->o_res.stateid, NULL,
1343 data->o_arg.fmode);
1344
1345 return state;
1346err:
1347 return ERR_PTR(ret);
1348
1349}
1350
1351static struct nfs4_state *
1352_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1353{
1354 struct inode *inode;
1355 struct nfs4_state *state = NULL;
1b370bc2 1356 int ret;
24ac23ab 1357
aac00a8d 1358 if (!data->rpc_done) {
6ee41268 1359 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1360 goto out;
1361 }
1362
1b370bc2 1363 ret = -EAGAIN;
24ac23ab 1364 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1365 goto err;
1775fd3e 1366 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1367 ret = PTR_ERR(inode);
03f28e3a 1368 if (IS_ERR(inode))
1b370bc2
TM		 1369 goto err;
1370 ret = -ENOMEM;
24ac23ab
TM		 1371 state = nfs4_get_open_state(inode, data->owner);
1372 if (state == NULL)
1b370bc2 1373 goto err_put_inode;
e23008ec
AA		 1374 if (data->o_res.delegation_type != 0)
1375 nfs4_opendata_check_deleg(data, state);
34310430 1376 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1377 data->o_arg.fmode);
24ac23ab 1378 iput(inode);
aac00a8d 1379out:
7aa262b5 1380 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1381 return state;
1b370bc2
TM		 1382err_put_inode:
1383 iput(inode);
1384err:
1385 return ERR_PTR(ret);
24ac23ab
TM		 1386}
1387
e23008ec
AA		 1388static struct nfs4_state *
1389nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1390{
1391 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1392 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1393 return _nfs4_opendata_to_nfs4_state(data);
1394}
1395
864472e9
TM		 1396static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1397{
1398 struct nfs_inode *nfsi = NFS_I(state->inode);
1399 struct nfs_open_context *ctx;
1400
1401 spin_lock(&state->inode->i_lock);
1402 list_for_each_entry(ctx, &nfsi->open_files, list) {
1403 if (ctx->state != state)
1404 continue;
1405 get_nfs_open_context(ctx);
1406 spin_unlock(&state->inode->i_lock);
1407 return ctx;
1408 }
1409 spin_unlock(&state->inode->i_lock);
1410 return ERR_PTR(-ENOENT);
1411}
1412
4a1c0893
TM		 1413static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1414 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1415{
1416 struct nfs4_opendata *opendata;
1417
4a1c0893 1418 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1419 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1420 if (opendata == NULL)
1421 return ERR_PTR(-ENOMEM);
1422 opendata->state = state;
1423 atomic_inc(&state->count);
1424 return opendata;
1425}
1426
dc0b027d 1427static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1428{
2ced46c2 1429 struct nfs4_state *newstate;
864472e9
TM		 1430 int ret;
1431
dc0b027d
TM		 1432 opendata->o_arg.open_flags = 0;
1433 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1434 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1435 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1436 nfs4_init_opendata_res(opendata);
b257957e 1437 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1438 if (ret != 0)
1439 return ret;
2ced46c2 1440 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1441 if (IS_ERR(newstate))
1442 return PTR_ERR(newstate);
643168c2 1443 nfs4_close_state(newstate, fmode);
2ced46c2 1444 *res = newstate;
864472e9
TM		 1445 return 0;
1446}
1447
1448static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1449{
864472e9 1450 struct nfs4_state *newstate;
864472e9
TM		 1451 int ret;
1452
1453 /* memory barrier prior to reading state->n_* */
2ced46c2 1454 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1455 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1456 smp_rmb();
1457 if (state->n_rdwr != 0) {
b0ed9dbc 1458 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1459 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1460 if (ret != 0)
1461 return ret;
2ced46c2
TM		 1462 if (newstate != state)
1463 return -ESTALE;
864472e9
TM		 1464 }
1465 if (state->n_wronly != 0) {
b0ed9dbc 1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1467 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1468 if (ret != 0)
1469 return ret;
2ced46c2
TM		 1470 if (newstate != state)
1471 return -ESTALE;
864472e9
TM		 1472 }
1473 if (state->n_rdonly != 0) {
b0ed9dbc 1474 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1475 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1476 if (ret != 0)
1477 return ret;
2ced46c2
TM		 1478 if (newstate != state)
1479 return -ESTALE;
864472e9 1480 }
1ac7e2fd
TM		 1481 /*
1482 * We may have performed cached opens for all three recoveries.
1483 * Check if we need to update the current stateid.
1484 */
1485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1486 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1487 write_seqlock(&state->seqlock);
1ac7e2fd 1488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1489 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1490 write_sequnlock(&state->seqlock);
1ac7e2fd 1491 }
864472e9
TM		 1492 return 0;
1493}
1494
1da177e4
LT		 1495/*
1496 * OPEN_RECLAIM:
1497 * reclaim state on the server after a reboot.
1da177e4 1498 */
539cd03a 1499static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1500{
1ac7e2fd 1501 struct nfs_delegation *delegation;
864472e9 1502 struct nfs4_opendata *opendata;
dc0b027d 1503 fmode_t delegation_type = 0;
1da177e4
LT		 1504 int status;
1505
4a1c0893
TM		 1506 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1507 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1508 if (IS_ERR(opendata))
1509 return PTR_ERR(opendata);
1ac7e2fd
TM		 1510 rcu_read_lock();
1511 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1512 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1513 delegation_type = delegation->type;
1ac7e2fd 1514 rcu_read_unlock();
864472e9
TM		 1515 opendata->o_arg.u.delegation_type = delegation_type;
1516 status = nfs4_open_recover(opendata, state);
c6d00e63 1517 nfs4_opendata_put(opendata);
1da177e4
LT		 1518 return status;
1519}
1520
539cd03a 1521static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1522{
1523 struct nfs_server *server = NFS_SERVER(state->inode);
1524 struct nfs4_exception exception = { };
1525 int err;
1526 do {
539cd03a 1527 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1528 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1529 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1530 continue;
168667c4 1531 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1532 break;
1533 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1534 } while (exception.retry);
1535 return err;
1536}
1537
864472e9
TM		 1538static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1539{
1540 struct nfs_open_context *ctx;
1541 int ret;
1542
1543 ctx = nfs4_state_find_open_context(state);
1544 if (IS_ERR(ctx))
91876b13 1545 return -EAGAIN;
539cd03a 1546 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1547 put_nfs_open_context(ctx);
1548 return ret;
1549}
1550
db4f2e63 1551static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1552{
be76b5b6
TM		 1553 switch (err) {
1554 default:
1555 printk(KERN_ERR "NFS: %s: unhandled error "
1556 "%d.\n", __func__, err);
1557 case 0:
1558 case -ENOENT:
1559 case -ESTALE:
1560 break;
1561 case -NFS4ERR_BADSESSION:
1562 case -NFS4ERR_BADSLOT:
1563 case -NFS4ERR_BAD_HIGH_SLOT:
1564 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1565 case -NFS4ERR_DEADSESSION:
1566 set_bit(NFS_DELEGATED_STATE, &state->flags);
1567 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1568 return -EAGAIN;
1569 case -NFS4ERR_STALE_CLIENTID:
1570 case -NFS4ERR_STALE_STATEID:
1571 set_bit(NFS_DELEGATED_STATE, &state->flags);
1572 case -NFS4ERR_EXPIRED:
1573 /* Don't recall a delegation if it was lost */
1574 nfs4_schedule_lease_recovery(server->nfs_client);
1575 return -EAGAIN;
1576 case -NFS4ERR_DELEG_REVOKED:
1577 case -NFS4ERR_ADMIN_REVOKED:
1578 case -NFS4ERR_BAD_STATEID:
db4f2e63 1579 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1580 nfs_inode_find_state_and_recover(state->inode,
1581 stateid);
1582 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1583 return 0;
1584 case -NFS4ERR_DELAY:
1585 case -NFS4ERR_GRACE:
1586 set_bit(NFS_DELEGATED_STATE, &state->flags);
1587 ssleep(1);
1588 return -EAGAIN;
db4f2e63
TM		 1589 case -ENOMEM:
1590 case -NFS4ERR_DENIED:
1591 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1592 return 0;
be76b5b6 1593 }
1da177e4
LT		 1594 return err;
1595}
1596
db4f2e63
TM		 1597int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1598{
1599 struct nfs_server *server = NFS_SERVER(state->inode);
1600 struct nfs4_opendata *opendata;
1601 int err;
1602
1603 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1604 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1605 if (IS_ERR(opendata))
1606 return PTR_ERR(opendata);
1607 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1608 err = nfs4_open_recover(opendata, state);
1609 nfs4_opendata_put(opendata);
1610 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1611}
1612
cdd4e68b
TM		 1613static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1614{
1615 struct nfs4_opendata *data = calldata;
1616
1617 data->rpc_status = task->tk_status;
26e976a8 1618 if (data->rpc_status == 0) {
f597c537 1619 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1620 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1621 renew_lease(data->o_res.server, data->timestamp);
3e309914 1622 data->rpc_done = 1;
26e976a8 1623 }
cdd4e68b
TM		 1624}
1625
1626static void nfs4_open_confirm_release(void *calldata)
1627{
1628 struct nfs4_opendata *data = calldata;
1629 struct nfs4_state *state = NULL;
1630
1631 /* If this request hasn't been cancelled, do nothing */
1632 if (data->cancelled == 0)
1633 goto out_free;
1634 /* In case of error, no cleanup! */
3e309914 1635 if (!data->rpc_done)
cdd4e68b 1636 goto out_free;
cdd4e68b 1637 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1638 if (!IS_ERR(state))
643168c2 1639 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1640out_free:
c6d00e63 1641 nfs4_opendata_put(data);
cdd4e68b
TM		 1642}
1643
1644static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1645 .rpc_call_done = nfs4_open_confirm_done,
1646 .rpc_release = nfs4_open_confirm_release,
1647};
1648
1649/*
1650 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1651 */
1652static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1653{
1654 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1655 struct rpc_task *task;
5138fde0
TM		 1656 struct rpc_message msg = {
1657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1658 .rpc_argp = &data->c_arg,
1659 .rpc_resp = &data->c_res,
1660 .rpc_cred = data->owner->so_cred,
1661 };
c970aa85
TM		 1662 struct rpc_task_setup task_setup_data = {
1663 .rpc_client = server->client,
5138fde0 1664 .rpc_message = &msg,
c970aa85
TM		 1665 .callback_ops = &nfs4_open_confirm_ops,
1666 .callback_data = data,
101070ca 1667 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1668 .flags = RPC_TASK_ASYNC,
1669 };
1da177e4
LT		 1670 int status;
1671
c6d00e63 1672 kref_get(&data->kref);
3e309914
TM		 1673 data->rpc_done = 0;
1674 data->rpc_status = 0;
5138fde0 1675 data->timestamp = jiffies;
c970aa85 1676 task = rpc_run_task(&task_setup_data);
7a1218a2 1677 if (IS_ERR(task))
cdd4e68b 1678 return PTR_ERR(task);
cdd4e68b
TM		 1679 status = nfs4_wait_for_completion_rpc_task(task);
1680 if (status != 0) {
1681 data->cancelled = 1;
1682 smp_wmb();
1683 } else
1684 status = data->rpc_status;
e6b3c4db 1685 rpc_put_task(task);
1da177e4
LT		 1686 return status;
1687}
1688
24ac23ab 1689static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1690{
24ac23ab
TM		 1691 struct nfs4_opendata *data = calldata;
1692 struct nfs4_state_owner *sp = data->owner;
549b19cc 1693 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1694
24ac23ab 1695 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1696 goto out_wait;
aac00a8d
TM		 1697 /*
1698 * Check if we still need to send an OPEN call, or if we can use
1699 * a delegation instead.
1700 */
1701 if (data->state != NULL) {
1702 struct nfs_delegation *delegation;
1703
dc0b027d 1704 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1705 goto out_no_action;
aac00a8d
TM		 1706 rcu_read_lock();
1707 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1708 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1709 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1710 can_open_delegated(delegation, data->o_arg.fmode))
1711 goto unlock_no_action;
aac00a8d
TM		 1712 rcu_read_unlock();
1713 }
95b72eb0 1714 /* Update client id. */
549b19cc 1715 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1716 switch (data->o_arg.claim) {
1717 case NFS4_OPEN_CLAIM_PREVIOUS:
1718 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1719 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1720 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1721 case NFS4_OPEN_CLAIM_FH:
1722 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1723 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1724 }
26e976a8 1725 data->timestamp = jiffies;
035168ab 1726 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1727 &data->o_arg.seq_args,
2240a9e2
TM		 1728 &data->o_res.seq_res,
1729 task) != 0)
1730 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1731
1732 /* Set the create mode (note dependency on the session type) */
1733 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1734 if (data->o_arg.open_flags & O_EXCL) {
1735 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1736 if (nfs4_has_persistent_session(clp))
1737 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1738 else if (clp->cl_mvops->minor_version > 0)
1739 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1740 }
6ee41268 1741 return;
652f89f6
TM		 1742unlock_no_action:
1743 rcu_read_unlock();
6ee41268
TM		 1744out_no_action:
1745 task->tk_action = NULL;
c8da19b9 1746out_wait:
b75ad4cd 1747 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1748}
1749
24ac23ab
TM		 1750static void nfs4_open_done(struct rpc_task *task, void *calldata)
1751{
1752 struct nfs4_opendata *data = calldata;
1da177e4 1753
24ac23ab 1754 data->rpc_status = task->tk_status;
d898528c 1755
14516c3a
TM		 1756 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1757 return;
d898528c 1758
24ac23ab 1759 if (task->tk_status == 0) {
807d66d8
TM		 1760 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1761 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1762 case S_IFREG:
1763 break;
1764 case S_IFLNK:
24ac23ab 1765 data->rpc_status = -ELOOP;
6f926b5b
TM		 1766 break;
1767 case S_IFDIR:
24ac23ab 1768 data->rpc_status = -EISDIR;
6f926b5b
TM		 1769 break;
1770 default:
24ac23ab 1771 data->rpc_status = -ENOTDIR;
807d66d8 1772 }
6f926b5b 1773 }
26e976a8 1774 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1775 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1776 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1777 }
3e309914 1778 data->rpc_done = 1;
24ac23ab 1779}
6f926b5b 1780
24ac23ab
TM		 1781static void nfs4_open_release(void *calldata)
1782{
1783 struct nfs4_opendata *data = calldata;
1784 struct nfs4_state *state = NULL;
1785
1786 /* If this request hasn't been cancelled, do nothing */
1787 if (data->cancelled == 0)
1788 goto out_free;
1789 /* In case of error, no cleanup! */
3e309914 1790 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1791 goto out_free;
1792 /* In case we need an open_confirm, no cleanup! */
1793 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1794 goto out_free;
24ac23ab 1795 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1796 if (!IS_ERR(state))
643168c2 1797 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1798out_free:
c6d00e63 1799 nfs4_opendata_put(data);
24ac23ab
TM		 1800}
1801
1802static const struct rpc_call_ops nfs4_open_ops = {
1803 .rpc_call_prepare = nfs4_open_prepare,
1804 .rpc_call_done = nfs4_open_done,
1805 .rpc_release = nfs4_open_release,
1806};
1807
b257957e 1808static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1809{
1810 struct inode *dir = data->dir->d_inode;
1811 struct nfs_server *server = NFS_SERVER(dir);
1812 struct nfs_openargs *o_arg = &data->o_arg;
1813 struct nfs_openres *o_res = &data->o_res;
1814 struct rpc_task *task;
5138fde0
TM		 1815 struct rpc_message msg = {
1816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1817 .rpc_argp = o_arg,
1818 .rpc_resp = o_res,
1819 .rpc_cred = data->owner->so_cred,
1820 };
c970aa85
TM		 1821 struct rpc_task_setup task_setup_data = {
1822 .rpc_client = server->client,
5138fde0 1823 .rpc_message = &msg,
c970aa85
TM		 1824 .callback_ops = &nfs4_open_ops,
1825 .callback_data = data,
101070ca 1826 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1827 .flags = RPC_TASK_ASYNC,
1828 };
24ac23ab
TM		 1829 int status;
1830
a9c92d6b 1831 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1832 kref_get(&data->kref);
3e309914
TM		 1833 data->rpc_done = 0;
1834 data->rpc_status = 0;
2ced46c2 1835 data->cancelled = 0;
bdeca1b7
TM		 1836 data->is_recover = 0;
1837 if (isrecover) {
8fe72bac 1838 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1839 data->is_recover = 1;
1840 }
c970aa85 1841 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1842 if (IS_ERR(task))
1843 return PTR_ERR(task);
1844 status = nfs4_wait_for_completion_rpc_task(task);
1845 if (status != 0) {
1846 data->cancelled = 1;
1847 smp_wmb();
1848 } else
1849 status = data->rpc_status;
1850 rpc_put_task(task);
1851
1852 return status;
1853}
1854
1855static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1856{
1857 struct inode *dir = data->dir->d_inode;
1858 struct nfs_openres *o_res = &data->o_res;
1859 int status;
1860
1861 status = nfs4_run_open_task(data, 1);
1862 if (status != 0 || !data->rpc_done)
1863 return status;
1864
6926afd1
TM		 1865 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1866
b257957e
AB		 1867 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1868 status = _nfs4_proc_open_confirm(data);
1869 if (status != 0)
1870 return status;
1871 }
1872
1873 return status;
1874}
1875
6168f62c
WAA		 1876static int nfs4_opendata_access(struct rpc_cred *cred,
1877 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1878 struct nfs4_state *state, fmode_t fmode,
1879 int openflags)
6168f62c
WAA		 1880{
1881 struct nfs_access_entry cache;
1882 u32 mask;
1883
1884 /* access call failed or for some reason the server doesn't
1885 * support any access modes -- defer access call until later */
1886 if (opendata->o_res.access_supported == 0)
1887 return 0;
1888
1889 mask = 0;
bbd3a8ee 1890 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1891 * write mode bits, but POSIX allows the creating process to write.
1892 * use openflags to check for exec, because fmode won't
1893 * always have FMODE_EXEC set when file open for exec. */
1894 if (openflags & __FMODE_EXEC) {
1895 /* ONLY check for exec rights */
1896 mask = MAY_EXEC;
1897 } else if (fmode & FMODE_READ)
1898 mask = MAY_READ;
6168f62c
WAA		 1899
1900 cache.cred = cred;
1901 cache.jiffies = jiffies;
1902 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1903 nfs_access_add_cache(state->inode, &cache);
1904
bbd3a8ee 1905 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1906 return 0;
1907
1908 /* even though OPEN succeeded, access is denied. Close the file */
1909 nfs4_close_state(state, fmode);
998f40b5 1910 return -EACCES;
6168f62c
WAA		 1911}
1912
b257957e
AB		 1913/*
1914 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1915 */
1916static int _nfs4_proc_open(struct nfs4_opendata *data)
1917{
1918 struct inode *dir = data->dir->d_inode;
1919 struct nfs_server *server = NFS_SERVER(dir);
1920 struct nfs_openargs *o_arg = &data->o_arg;
1921 struct nfs_openres *o_res = &data->o_res;
1922 int status;
1923
1924 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1925 if (!data->rpc_done)
1926 return status;
1927 if (status != 0) {
1928 if (status == -NFS4ERR_BADNAME &&
1929 !(o_arg->open_flags & O_CREAT))
1930 return -ENOENT;
24ac23ab 1931 return status;
08ef7bd3 1932 }
24ac23ab 1933
6926afd1
TM		 1934 nfs_fattr_map_and_free_names(server, &data->f_attr);
1935
90ff0c54 1936 if (o_arg->open_flags & O_CREAT)
56ae19f3 1937 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1938 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1939 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1940 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1941 status = _nfs4_proc_open_confirm(data);
1da177e4 1942 if (status != 0)
24ac23ab 1943 return status;
1da177e4
LT		 1944 }
1945 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1946 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1947 return 0;
1da177e4
LT		 1948}
1949
d83217c1
AA		 1950static int nfs4_recover_expired_lease(struct nfs_server *server)
1951{
1952 return nfs4_client_recover_expired_lease(server->nfs_client);
1953}
1954
1da177e4
LT		 1955/*
1956 * OPEN_EXPIRED:
1957 * reclaim state on the server after a network partition.
1958 * Assumes caller holds the appropriate lock
1959 */
539cd03a 1960static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1961{
e56e0b78 1962 struct nfs4_opendata *opendata;
864472e9 1963 int ret;
1da177e4 1964
4a1c0893 1965 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1966 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1967 if (IS_ERR(opendata))
1968 return PTR_ERR(opendata);
864472e9 1969 ret = nfs4_open_recover(opendata, state);
35d05778 1970 if (ret == -ESTALE)
3d4ff43d 1971 d_drop(ctx->dentry);
c6d00e63 1972 nfs4_opendata_put(opendata);
864472e9 1973 return ret;
1da177e4
LT		 1974}
1975
a9ed2e25 1976static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1977{
539cd03a 1978 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1979 struct nfs4_exception exception = { };
1980 int err;
1981
1982 do {
539cd03a 1983 err = _nfs4_open_expired(ctx, state);
42113a75 1984 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1985 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1986 continue;
a9ed2e25
TM		 1987 switch (err) {
1988 default:
1989 goto out;
1990 case -NFS4ERR_GRACE:
1991 case -NFS4ERR_DELAY:
1992 nfs4_handle_exception(server, err, &exception);
1993 err = 0;
1994 }
202b50dc 1995 } while (exception.retry);
a9ed2e25 1996out:
202b50dc
TM		 1997 return err;
1998}
1999
1da177e4
LT		 2000static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2001{
1da177e4 2002 struct nfs_open_context *ctx;
864472e9 2003 int ret;
1da177e4 2004
864472e9
TM		 2005 ctx = nfs4_state_find_open_context(state);
2006 if (IS_ERR(ctx))
91876b13 2007 return -EAGAIN;
539cd03a 2008 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2009 put_nfs_open_context(ctx);
2010 return ret;
1da177e4
LT		 2011}
2012
f062eb6c 2013#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2014static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2015{
f062eb6c 2016 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2017 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2018 struct nfs_delegation *delegation;
2019 struct rpc_cred *cred = NULL;
2020 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2021
2022 /* If a state reset has been done, test_stateid is unneeded */
2023 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2024 return;
2025
ab7cb0df
TM		 2026 /* Get the delegation credential for use by test/free_stateid */
2027 rcu_read_lock();
2028 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2029 if (delegation != NULL &&
2030 nfs4_stateid_match(&delegation->stateid, stateid)) {
2031 cred = get_rpccred(delegation->cred);
2032 rcu_read_unlock();
2033 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2034 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2035 } else
2036 rcu_read_unlock();
2037
3e60ffdd
CL		 2038 if (status != NFS_OK) {
2039 /* Free the stateid unless the server explicitly
2040 * informs us the stateid is unrecognized. */
2041 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2042 nfs41_free_stateid(server, stateid, cred);
6938867e 2043 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2044
6938867e
BS		 2045 write_seqlock(&state->seqlock);
2046 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2047 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2048 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2049 }
ab7cb0df
TM		 2050
2051 if (cred != NULL)
2052 put_rpccred(cred);
3e60ffdd
CL		 2053}
2054
2055/**
2056 * nfs41_check_open_stateid - possibly free an open stateid
2057 *
2058 * @state: NFSv4 state for an inode
2059 *
2060 * Returns NFS_OK if recovery for this stateid is now finished.
2061 * Otherwise a negative NFS4ERR value is returned.
2062 */
2063static int nfs41_check_open_stateid(struct nfs4_state *state)
2064{
2065 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2066 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2067 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2068 int status;
2069
2070 /* If a state reset has been done, test_stateid is unneeded */
2071 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2072 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2073 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2074 return -NFS4ERR_BAD_STATEID;
2075
ab7cb0df 2076 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2077 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2078 if (status != NFS_OK) {
2079 /* Free the stateid unless the server explicitly
2080 * informs us the stateid is unrecognized. */
2081 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2082 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2083
2084 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2085 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2086 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2087 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2088 }
2089 return status;
2090}
2091
2092static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
eb64cf96 2094 int status;
b01dd1d8 2095
3e60ffdd
CL		 2096 nfs41_clear_delegation_stateid(state);
2097 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2098 if (status != NFS_OK)
2099 status = nfs4_open_expired(sp, state);
2100 return status;
f062eb6c
BS		 2101}
2102#endif
2103
aa53ed54
JL		 2104/*
2105 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2106 * fields corresponding to attributes that were used to store the verifier.
2107 * Make sure we clobber those fields in the later setattr call
2108 */
2109static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2110{
2111 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2112 !(sattr->ia_valid & ATTR_ATIME_SET))
2113 sattr->ia_valid |= ATTR_ATIME;
2114
2115 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2116 !(sattr->ia_valid & ATTR_MTIME_SET))
2117 sattr->ia_valid |= ATTR_MTIME;
2118}
2119
c21443c2
TM		 2120static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2121 fmode_t fmode,
2122 int flags,
3efb9722 2123 struct nfs_open_context *ctx)
c21443c2
TM		 2124{
2125 struct nfs4_state_owner *sp = opendata->owner;
2126 struct nfs_server *server = sp->so_server;
275bb307 2127 struct dentry *dentry;
c21443c2
TM		 2128 struct nfs4_state *state;
2129 unsigned int seq;
2130 int ret;
2131
2132 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2133
2134 ret = _nfs4_proc_open(opendata);
2135 if (ret != 0)
2136 goto out;
2137
2138 state = nfs4_opendata_to_nfs4_state(opendata);
2139 ret = PTR_ERR(state);
2140 if (IS_ERR(state))
2141 goto out;
2142 if (server->caps & NFS_CAP_POSIX_LOCK)
2143 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2144
275bb307
TM		 2145 dentry = opendata->dentry;
2146 if (dentry->d_inode == NULL) {
2147 /* FIXME: Is this d_drop() ever needed? */
2148 d_drop(dentry);
2149 dentry = d_add_unique(dentry, igrab(state->inode));
2150 if (dentry == NULL) {
2151 dentry = opendata->dentry;
2152 } else if (dentry != ctx->dentry) {
2153 dput(ctx->dentry);
2154 ctx->dentry = dget(dentry);
2155 }
2156 nfs_set_verifier(dentry,
2157 nfs_save_change_attribute(opendata->dir->d_inode));
2158 }
2159
c21443c2
TM		 2160 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2161 if (ret != 0)
2162 goto out;
2163
3efb9722 2164 ctx->state = state;
c45ffdd2
TM		 2165 if (dentry->d_inode == state->inode) {
2166 nfs_inode_attach_open_context(ctx);
2167 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2168 nfs4_schedule_stateid_recovery(server, state);
2169 }
c21443c2
TM		 2170out:
2171 return ret;
2172}
2173
1da177e4 2174/*
24ac23ab 2175 * Returns a referenced nfs4_state
1da177e4 2176 */
82be417a 2177static int _nfs4_do_open(struct inode *dir,
4197a055 2178 struct nfs_open_context *ctx,
82be417a
AA		 2179 int flags,
2180 struct iattr *sattr,
959d921f 2181 struct nfs4_label *label)
1da177e4
LT		 2182{
2183 struct nfs4_state_owner *sp;
2184 struct nfs4_state *state = NULL;
2185 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2186 struct nfs4_opendata *opendata;
4197a055
TM		 2187 struct dentry *dentry = ctx->dentry;
2188 struct rpc_cred *cred = ctx->cred;
2189 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2190 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2191 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2192 struct nfs4_label *olabel = NULL;
aac00a8d 2193 int status;
1da177e4
LT		 2194
2195 /* Protect against reboot recovery conflicts */
1da177e4 2196 status = -ENOMEM;
d1e284d5
TM		 2197 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2198 if (sp == NULL) {
1da177e4
LT		 2199 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2200 goto out_err;
2201 }
58d9714a
TM		 2202 status = nfs4_recover_expired_lease(server);
2203 if (status != 0)
b4454fe1 2204 goto err_put_state_owner;
82a2c1b7
AV		 2205 if (dentry->d_inode != NULL)
2206 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2207 status = -ENOMEM;
49f9a0fa
TM		 2208 if (dentry->d_inode)
2209 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2210 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2211 label, claim, GFP_KERNEL);
e56e0b78 2212 if (opendata == NULL)
95d35cb4 2213 goto err_put_state_owner;
1da177e4 2214
14c43f76
DQ		 2215 if (label) {
2216 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2217 if (IS_ERR(olabel)) {
2218 status = PTR_ERR(olabel);
2219 goto err_opendata_put;
2220 }
2221 }
2222
82be417a
AA		 2223 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2224 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2225 if (!opendata->f_attr.mdsthreshold)
14c43f76 2226 goto err_free_label;
1549210f 2227 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2228 }
82a2c1b7
AV		 2229 if (dentry->d_inode != NULL)
2230 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2231
3efb9722 2232 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2233 if (status != 0)
14c43f76 2234 goto err_free_label;
3efb9722 2235 state = ctx->state;
6168f62c 2236
549b19cc
TM		 2237 if ((opendata->o_arg.open_flags & O_EXCL) &&
2238 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2239 nfs4_exclusive_attrset(opendata, sattr);
2240
2241 nfs_fattr_init(opendata->o_res.f_attr);
2242 status = nfs4_do_setattr(state->inode, cred,
2243 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2244 state, label, olabel);
2245 if (status == 0) {
0ab64e0e 2246 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2247 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2248 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2249 }
0ab64e0e 2250 }
82be417a
AA		 2251
2252 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2253 *ctx_th = opendata->f_attr.mdsthreshold;
2254 else
2255 kfree(opendata->f_attr.mdsthreshold);
2256 opendata->f_attr.mdsthreshold = NULL;
2257
14c43f76
DQ		 2258 nfs4_label_free(olabel);
2259
c6d00e63 2260 nfs4_opendata_put(opendata);
1da177e4 2261 nfs4_put_state_owner(sp);
1da177e4 2262 return 0;
14c43f76
DQ		 2263err_free_label:
2264 nfs4_label_free(olabel);
c6d00e63 2265err_opendata_put:
82be417a 2266 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2267 nfs4_opendata_put(opendata);
e56e0b78
TM		 2268err_put_state_owner:
2269 nfs4_put_state_owner(sp);
1da177e4 2270out_err:
1da177e4
LT		 2271 return status;
2272}
2273
2274
82be417a 2275static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2276 struct nfs_open_context *ctx,
82be417a
AA		 2277 int flags,
2278 struct iattr *sattr,
959d921f 2279 struct nfs4_label *label)
1da177e4 2280{
49f9a0fa 2281 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2282 struct nfs4_exception exception = { };
2283 struct nfs4_state *res;
2284 int status;
2285
2286 do {
959d921f 2287 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2288 res = ctx->state;
42113a75 2289 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2290 if (status == 0)
2291 break;
2292 /* NOTE: BAD_SEQID means the server and client disagree about the
2293 * book-keeping w.r.t. state-changing operations
2294 * (OPEN/CLOSE/LOCK/LOCKU...)
2295 * It is actually a sign of a bug on the client or on the server.
2296 *
2297 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2298 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2299 * have unhashed the old state_owner for us, and that we can
2300 * therefore safely retry using a new one. We should still warn
2301 * the user though...
2302 */
2303 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2304 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2305 " returned a bad sequence-id error!\n",
2306 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2307 exception.retry = 1;
2308 continue;
2309 }
550f5747
TM		 2310 /*
2311 * BAD_STATEID on OPEN means that the server cancelled our
2312 * state before it received the OPEN_CONFIRM.
2313 * Recover by retrying the request as per the discussion
2314 * on Page 181 of RFC3530.
2315 */
2316 if (status == -NFS4ERR_BAD_STATEID) {
2317 exception.retry = 1;
2318 continue;
2319 }
aac00a8d
TM		 2320 if (status == -EAGAIN) {
2321 /* We must have found a delegation */
2322 exception.retry = 1;
2323 continue;
2324 }
49f9a0fa
TM		 2325 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2326 continue;
2327 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2328 status, &exception));
2329 } while (exception.retry);
2330 return res;
2331}
2332
659bfcd6
TM		 2333static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2334 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2335 struct nfs4_state *state, struct nfs4_label *ilabel,
2336 struct nfs4_label *olabel)
1da177e4 2337{
3e4f6290 2338 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2339 struct nfs_setattrargs arg = {
3e4f6290 2340 .fh = NFS_FH(inode),
1da177e4
LT		 2341 .iap = sattr,
2342 .server = server,
2343 .bitmask = server->attr_bitmask,
1775fd3e 2344 .label = ilabel,
1da177e4
LT		 2345 };
2346 struct nfs_setattrres res = {
2347 .fattr = fattr,
1775fd3e 2348 .label = olabel,
1da177e4
LT		 2349 .server = server,
2350 };
2351 struct rpc_message msg = {
659bfcd6
TM		 2352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2353 .rpc_argp = &arg,
2354 .rpc_resp = &res,
2355 .rpc_cred = cred,
1da177e4 2356 };
26e976a8 2357 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2358 fmode_t fmode;
2359 bool truncate;
65e4308d 2360 int status;
1da177e4 2361
aa9c2669
DQ		 2362 arg.bitmask = nfs4_bitmask(server, ilabel);
2363 if (ilabel)
2364 arg.bitmask = nfs4_bitmask(server, olabel);
2365
0e574af1 2366 nfs_fattr_init(fattr);
1da177e4 2367
ee3ae84e
TM		 2368 /* Servers should only apply open mode checks for file size changes */
2369 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2370 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2371
2372 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2373 /* Use that stateid */
2374 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2375 struct nfs_lockowner lockowner = {
2376 .l_owner = current->files,
2377 .l_pid = current->tgid,
2378 };
4fc8796d 2379 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2380 &lockowner);
08e9eac4 2381 } else
f597c537 2382 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2383
7c513058 2384 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2385 if (status == 0 && state != NULL)
2386 renew_lease(server, timestamp);
65e4308d 2387 return status;
1da177e4
LT		 2388}
2389
659bfcd6
TM		 2390static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2391 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2392 struct nfs4_state *state, struct nfs4_label *ilabel,
2393 struct nfs4_label *olabel)
1da177e4 2394{
3e4f6290 2395 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2396 struct nfs4_exception exception = {
2397 .state = state,
3114ea7a 2398 .inode = inode,
a1d0b5ee 2399 };
1da177e4
LT		 2400 int err;
2401 do {
1775fd3e 2402 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2403 trace_nfs4_setattr(inode, err);
451146be
TM		 2404 switch (err) {
2405 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2406 if (!(sattr->ia_valid & ATTR_SIZE)) {
2407 pr_warn_once("NFSv4: server %s is incorrectly "
2408 "applying open mode checks to "
2409 "a SETATTR that is not "
2410 "changing file size.\n",
2411 server->nfs_client->cl_hostname);
2412 }
451146be
TM		 2413 if (state && !(state->state & FMODE_WRITE)) {
2414 err = -EBADF;
2415 if (sattr->ia_valid & ATTR_OPEN)
2416 err = -EACCES;
2417 goto out;
2418 }
2419 }
2420 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2421 } while (exception.retry);
451146be 2422out:
1da177e4
LT		 2423 return err;
2424}
2425
2426struct nfs4_closedata {
2427 struct inode *inode;
2428 struct nfs4_state *state;
2429 struct nfs_closeargs arg;
2430 struct nfs_closeres res;
516a6af6 2431 struct nfs_fattr fattr;
26e976a8 2432 unsigned long timestamp;
f7e8917a
FI		 2433 bool roc;
2434 u32 roc_barrier;
1da177e4
LT		 2435};
2436
963d8fe5 2437static void nfs4_free_closedata(void *data)
9512135d 2438{
963d8fe5
TM		 2439 struct nfs4_closedata *calldata = data;
2440 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2441 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2442
f7e8917a
FI		 2443 if (calldata->roc)
2444 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2445 nfs4_put_open_state(calldata->state);
2446 nfs_free_seqid(calldata->arg.seqid);
9512135d 2447 nfs4_put_state_owner(sp);
322b2b90 2448 nfs_sb_deactive(sb);
9512135d
TM		 2449 kfree(calldata);
2450}
2451
88069f77
TM		 2452static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2453 fmode_t fmode)
2454{
2455 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2456 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2457 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2458 case FMODE_WRITE:
88069f77 2459 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2460 break;
2461 case FMODE_READ:
88069f77 2462 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2463 break;
2464 case 0:
2465 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2467 clear_bit(NFS_OPEN_STATE, &state->flags);
2468 }
88069f77
TM		 2469 spin_unlock(&state->owner->so_lock);
2470}
2471
963d8fe5 2472static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2473{
963d8fe5 2474 struct nfs4_closedata *calldata = data;
1da177e4 2475 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2476 struct nfs_server *server = NFS_SERVER(calldata->inode);
2477
a3ca5651 2478 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2479 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2480 return;
42113a75 2481 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2482 /* hmm. we are done with the inode, and in the process of freeing
2483 * the state_owner. we keep this around to process errors
2484 */
1da177e4
LT		 2485 switch (task->tk_status) {
2486 case 0:
f7e8917a
FI		 2487 if (calldata->roc)
2488 pnfs_roc_set_barrier(state->inode,
2489 calldata->roc_barrier);
45328c35 2490 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2491 renew_lease(server, calldata->timestamp);
88069f77
TM		 2492 nfs4_close_clear_stateid_flags(state,
2493 calldata->arg.fmode);
1da177e4
LT		 2494 break;
2495 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2496 case -NFS4ERR_OLD_STATEID:
2497 case -NFS4ERR_BAD_STATEID:
1da177e4 2498 case -NFS4ERR_EXPIRED:
dc0b027d 2499 if (calldata->arg.fmode == 0)
9e33bed5 2500 break;
1da177e4 2501 default:
72211dbe
TM		 2502 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2503 rpc_restart_call_prepare(task);
1da177e4 2504 }
72211dbe 2505 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2506 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2507 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2508}
2509
4ce70ada 2510static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2511{
4ce70ada 2512 struct nfs4_closedata *calldata = data;
9512135d 2513 struct nfs4_state *state = calldata->state;
7fdab069 2514 struct inode *inode = calldata->inode;
88069f77 2515 int call_close = 0;
9512135d 2516
a3ca5651 2517 dprintk("%s: begin!\n", __func__);
963d8fe5 2518 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2519 goto out_wait;
003707c7 2520
88069f77
TM		 2521 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2522 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2523 spin_lock(&state->owner->so_lock);
003707c7 2524 /* Calculate the change in open mode */
e7616923 2525 if (state->n_rdwr == 0) {
003707c7 2526 if (state->n_rdonly == 0) {
88069f77
TM		 2527 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2528 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2529 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2530 }
2531 if (state->n_wronly == 0) {
88069f77
TM		 2532 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2533 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2534 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2535 }
e7616923 2536 }
5d422301
TM		 2537 if (!nfs4_valid_open_stateid(state))
2538 call_close = 0;
4cecb76f 2539 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2540
2541 if (!call_close) {
963d8fe5 2542 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2543 goto out_no_action;
9512135d 2544 }
88069f77 2545
f7e8917a 2546 if (calldata->arg.fmode == 0) {
88069f77 2547 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2548 if (calldata->roc &&
b9536ad5
AA		 2549 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2550 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2551 goto out_wait;
b9536ad5 2552 }
f7e8917a 2553 }
88069f77 2554
516a6af6 2555 nfs_fattr_init(calldata->res.fattr);
26e976a8 2556 calldata->timestamp = jiffies;
7fdab069 2557 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2558 &calldata->arg.seq_args,
2559 &calldata->res.seq_res,
2240a9e2
TM		 2560 task) != 0)
2561 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2562 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2563 return;
2564out_no_action:
2565 task->tk_action = NULL;
2566out_wait:
2567 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2568}
2569
963d8fe5 2570static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2571 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2572 .rpc_call_done = nfs4_close_done,
2573 .rpc_release = nfs4_free_closedata,
2574};
2575
1da177e4
LT		 2576/*
2577 * It is possible for data to be read/written from a mem-mapped file
2578 * after the sys_close call (which hits the vfs layer as a flush).
2579 * This means that we can't safely call nfsv4 close on a file until
2580 * the inode is cleared. This in turn means that we are not good
2581 * NFSv4 citizens - we do not indicate to the server to update the file's
2582 * share state even when we are done with one of the three share
2583 * stateid's in the inode.
2584 *
2585 * NOTE: Caller must be holding the sp->so_owner semaphore!
2586 */
1f7977c1 2587int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2588{
4a35bd41 2589 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2590 struct nfs4_closedata *calldata;
b39e625b
TM		 2591 struct nfs4_state_owner *sp = state->owner;
2592 struct rpc_task *task;
5138fde0
TM		 2593 struct rpc_message msg = {
2594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2595 .rpc_cred = state->owner->so_cred,
2596 };
c970aa85
TM		 2597 struct rpc_task_setup task_setup_data = {
2598 .rpc_client = server->client,
5138fde0 2599 .rpc_message = &msg,
c970aa85 2600 .callback_ops = &nfs4_close_ops,
101070ca 2601 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2602 .flags = RPC_TASK_ASYNC,
2603 };
9512135d 2604 int status = -ENOMEM;
1da177e4 2605
8535b2be 2606 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2607 if (calldata == NULL)
9512135d 2608 goto out;
a9c92d6b 2609 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2610 calldata->inode = state->inode;
1da177e4 2611 calldata->state = state;
4a35bd41 2612 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2613 calldata->arg.stateid = &state->open_stateid;
1da177e4 2614 /* Serialization for the sequence id */
8535b2be 2615 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2616 if (calldata->arg.seqid == NULL)
2617 goto out_free_calldata;
dc0b027d 2618 calldata->arg.fmode = 0;
a65318bf 2619 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2620 calldata->res.fattr = &calldata->fattr;
c1d51931 2621 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2622 calldata->res.server = server;
1f7977c1 2623 calldata->roc = pnfs_roc(state->inode);
643168c2 2624 nfs_sb_active(calldata->inode->i_sb);
9512135d 2625
1174dd1f
TM		 2626 msg.rpc_argp = &calldata->arg;
2627 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2628 task_setup_data.callback_data = calldata;
2629 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2630 if (IS_ERR(task))
2631 return PTR_ERR(task);
a49c3c77
TM		 2632 status = 0;
2633 if (wait)
2634 status = rpc_wait_for_completion_task(task);
b39e625b 2635 rpc_put_task(task);
a49c3c77 2636 return status;
9512135d
TM		 2637out_free_calldata:
2638 kfree(calldata);
2639out:
b39e625b
TM		 2640 nfs4_put_open_state(state);
2641 nfs4_put_state_owner(sp);
9512135d 2642 return status;
1da177e4
LT		 2643}
2644
2b484297 2645static struct inode *
cd9a1c0e 2646nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2647{
1da177e4 2648 struct nfs4_state *state;
aa9c2669
DQ		 2649 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2650
2651 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2652
565277f6 2653 /* Protect against concurrent sillydeletes */
959d921f 2654 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2655
2656 nfs4_label_release_security(label);
2657
f46e0bd3
TM		 2658 if (IS_ERR(state))
2659 return ERR_CAST(state);
275bb307 2660 return state->inode;
1da177e4
LT		 2661}
2662
1185a552 2663static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2664{
2665 if (ctx->state == NULL)
2666 return;
2667 if (is_sync)
643168c2 2668 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2669 else
643168c2 2670 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2671}
1da177e4
LT		 2672
2673static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2674{
43652ad5
BH		 2675 struct nfs4_server_caps_arg args = {
2676 .fhandle = fhandle,
2677 };
1da177e4
LT		 2678 struct nfs4_server_caps_res res = {};
2679 struct rpc_message msg = {
2680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2681 .rpc_argp = &args,
1da177e4
LT		 2682 .rpc_resp = &res,
2683 };
2684 int status;
2685
7c513058 2686 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2687 if (status == 0) {
2688 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2689 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2690 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2691 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2692 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2693 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2694 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2695 server->caps |= NFS_CAP_ACLS;
2696 if (res.has_links != 0)
2697 server->caps |= NFS_CAP_HARDLINKS;
2698 if (res.has_symlinks != 0)
2699 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2700 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2701 server->caps |= NFS_CAP_FILEID;
2702 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2703 server->caps |= NFS_CAP_MODE;
2704 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2705 server->caps |= NFS_CAP_NLINK;
2706 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2707 server->caps |= NFS_CAP_OWNER;
2708 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2709 server->caps |= NFS_CAP_OWNER_GROUP;
2710 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2711 server->caps |= NFS_CAP_ATIME;
2712 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2713 server->caps |= NFS_CAP_CTIME;
2714 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2715 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2716#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2717 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2718 server->caps |= NFS_CAP_SECURITY_LABEL;
2719#endif
2720 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2721 sizeof(server->attr_bitmask));
62ab460c 2722
aa9c2669
DQ		 2723 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2724 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2725 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2726 }
a65318bf
TM		 2727 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2728 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2729 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2730 server->acl_bitmask = res.acl_bitmask;
264e6351 2731 server->fh_expire_type = res.fh_expire_type;
1da177e4 2732 }
cccef3b9 2733
1da177e4
LT		 2734 return status;
2735}
2736
55a97593 2737int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2738{
2739 struct nfs4_exception exception = { };
2740 int err;
2741 do {
2742 err = nfs4_handle_exception(server,
2743 _nfs4_server_capabilities(server, fhandle),
2744 &exception);
2745 } while (exception.retry);
2746 return err;
2747}
2748
2749static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2750 struct nfs_fsinfo *info)
2751{
aa9c2669 2752 u32 bitmask[3];
1da177e4 2753 struct nfs4_lookup_root_arg args = {
aa9c2669 2754 .bitmask = bitmask,
1da177e4
LT		 2755 };
2756 struct nfs4_lookup_res res = {
2757 .server = server,
0e574af1 2758 .fattr = info->fattr,
1da177e4
LT		 2759 .fh = fhandle,
2760 };
2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2763 .rpc_argp = &args,
2764 .rpc_resp = &res,
2765 };
008f55d0 2766
aa9c2669
DQ		 2767 bitmask[0] = nfs4_fattr_bitmap[0];
2768 bitmask[1] = nfs4_fattr_bitmap[1];
2769 /*
2770 * Process the label in the upcoming getfattr
2771 */
2772 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2773
0e574af1 2774 nfs_fattr_init(info->fattr);
7c513058 2775 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2776}
2777
2778static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2779 struct nfs_fsinfo *info)
2780{
2781 struct nfs4_exception exception = { };
2782 int err;
2783 do {
fb8a5ba8 2784 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2785 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2786 switch (err) {
2787 case 0:
2788 case -NFS4ERR_WRONGSEC:
05e9cfb4 2789 goto out;
fb8a5ba8
BS		 2790 default:
2791 err = nfs4_handle_exception(server, err, &exception);
2792 }
1da177e4 2793 } while (exception.retry);
05e9cfb4 2794out:
1da177e4
LT		 2795 return err;
2796}
2797
8f70e95f
BS		 2798static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2799 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2800{
c2190661
TM		 2801 struct rpc_auth_create_args auth_args = {
2802 .pseudoflavor = flavor,
2803 };
8f70e95f
BS		 2804 struct rpc_auth *auth;
2805 int ret;
2806
c2190661 2807 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2808 if (IS_ERR(auth)) {
75bc8821 2809 ret = -EACCES;
8f70e95f
BS		 2810 goto out;
2811 }
2812 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2813out:
2814 return ret;
2815}
2816
9a744ba3
CL		 2817/*
2818 * Retry pseudoroot lookup with various security flavors. We do this when:
2819 *
2820 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2821 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2822 *
2823 * Returns zero on success, or a negative NFS4ERR value, or a
2824 * negative errno value.
2825 */
801a16dc 2826static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2827 struct nfs_fsinfo *info)
1da177e4 2828{
9a744ba3
CL		 2829 /* Per 3530bis 15.33.5 */
2830 static const rpc_authflavor_t flav_array[] = {
2831 RPC_AUTH_GSS_KRB5P,
2832 RPC_AUTH_GSS_KRB5I,
2833 RPC_AUTH_GSS_KRB5,
c4eafe11 2834 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2835 RPC_AUTH_NULL,
2836 };
2837 int status = -EPERM;
2838 size_t i;
6a1a1e34 2839
9a744ba3 2840 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2841 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2842 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2843 continue;
2844 break;
8f70e95f 2845 }
9a744ba3 2846
fb8a5ba8
BS		 2847 /*
2848 * -EACCESS could mean that the user doesn't have correct permissions
2849 * to access the mount. It could also mean that we tried to mount
2850 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2851 * existing mount programs don't handle -EACCES very well so it should
2852 * be mapped to -EPERM instead.
2853 */
2854 if (status == -EACCES)
2855 status = -EPERM;
801a16dc
BS		 2856 return status;
2857}
2858
2ed4b95b
CL		 2859static int nfs4_do_find_root_sec(struct nfs_server *server,
2860 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2861{
2862 int mv = server->nfs_client->cl_minorversion;
2863 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2864}
2865
2866/**
2867 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2868 * @server: initialized nfs_server handle
2869 * @fhandle: we fill in the pseudo-fs root file handle
2870 * @info: we fill in an FSINFO struct
2871 *
2872 * Returns zero on success, or a negative errno.
801a16dc 2873 */
3028eb2b
BS		 2874int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2875 struct nfs_fsinfo *info)
801a16dc 2876{
2ed4b95b
CL		 2877 int status;
2878
2879 status = nfs4_lookup_root(server, fhandle, info);
2880 if ((status == -NFS4ERR_WRONGSEC) &&
2881 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2882 status = nfs4_do_find_root_sec(server, fhandle, info);
2883
1da177e4
LT		 2884 if (status == 0)
2885 status = nfs4_server_capabilities(server, fhandle);
2886 if (status == 0)
2887 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2888
c12e87f4 2889 return nfs4_map_errors(status);
1da177e4
LT		 2890}
2891
bae36241
BS		 2892static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2893 struct nfs_fsinfo *info)
2894{
2895 int error;
2896 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2897 struct nfs4_label *label = NULL;
bae36241
BS		 2898
2899 error = nfs4_server_capabilities(server, mntfh);
2900 if (error < 0) {
2901 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2902 return error;
2903 }
2904
14c43f76
DQ		 2905 label = nfs4_label_alloc(server, GFP_KERNEL);
2906 if (IS_ERR(label))
2907 return PTR_ERR(label);
2908
1775fd3e 2909 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2910 if (error < 0) {
2911 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2912 goto err_free_label;
bae36241
BS		 2913 }
2914
2915 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2916 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2917 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2918
14c43f76
DQ		 2919err_free_label:
2920 nfs4_label_free(label);
2921
bae36241
BS		 2922 return error;
2923}
2924
6b97fd3d
MN		 2925/*
2926 * Get locations and (maybe) other attributes of a referral.
2927 * Note that we'll actually follow the referral later when
2928 * we detect fsid mismatch in inode revalidation
2929 */
f05d147f
BS		 2930static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2931 const struct qstr *name, struct nfs_fattr *fattr,
2932 struct nfs_fh *fhandle)
6b97fd3d
MN		 2933{
2934 int status = -ENOMEM;
2935 struct page *page = NULL;
2936 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2937
2938 page = alloc_page(GFP_KERNEL);
2939 if (page == NULL)
2940 goto out;
2941 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2942 if (locations == NULL)
2943 goto out;
2944
f05d147f 2945 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2946 if (status != 0)
2947 goto out;
2948 /* Make sure server returned a different fsid for the referral */
2949 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2950 dprintk("%s: server did not return a different fsid for"
2951 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2952 status = -EIO;
2953 goto out;
2954 }
533eb461
AA		 2955 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2956 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2957
533eb461 2958 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2959 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2960 memset(fhandle, 0, sizeof(struct nfs_fh));
2961out:
2962 if (page)
2963 __free_page(page);
5d7ca35a 2964 kfree(locations);
6b97fd3d
MN		 2965 return status;
2966}
2967
1775fd3e
DQ		 2968static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2969 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2970{
2971 struct nfs4_getattr_arg args = {
2972 .fh = fhandle,
2973 .bitmask = server->attr_bitmask,
2974 };
2975 struct nfs4_getattr_res res = {
2976 .fattr = fattr,
1775fd3e 2977 .label = label,
1da177e4
LT		 2978 .server = server,
2979 };
2980 struct rpc_message msg = {
2981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2982 .rpc_argp = &args,
2983 .rpc_resp = &res,
2984 };
aa9c2669
DQ		 2985
2986 args.bitmask = nfs4_bitmask(server, label);
2987
0e574af1 2988 nfs_fattr_init(fattr);
7c513058 2989 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2990}
2991
1775fd3e
DQ		 2992static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2993 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2994{
2995 struct nfs4_exception exception = { };
2996 int err;
2997 do {
b5f875a9
TM		 2998 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2999 trace_nfs4_getattr(server, fhandle, fattr, err);
3000 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3001 &exception);
3002 } while (exception.retry);
3003 return err;
3004}
3005
3006/*
3007 * The file is not closed if it is opened due to the a request to change
3008 * the size of the file. The open call will not be needed once the
3009 * VFS layer lookup-intents are implemented.
3010 *
3011 * Close is called when the inode is destroyed.
3012 * If we haven't opened the file for O_WRONLY, we
3013 * need to in the size_change case to obtain a stateid.
3014 *
3015 * Got race?
3016 * Because OPEN is always done by name in nfsv4, it is
3017 * possible that we opened a different file by the same
3018 * name. We can recognize this race condition, but we
3019 * can't do anything about it besides returning an error.
3020 *
3021 * This will be fixed with VFS changes (lookup-intent).
3022 */
3023static int
3024nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3025 struct iattr *sattr)
3026{
08e9eac4 3027 struct inode *inode = dentry->d_inode;
659bfcd6 3028 struct rpc_cred *cred = NULL;
d530838b 3029 struct nfs4_state *state = NULL;
14c43f76 3030 struct nfs4_label *label = NULL;
1da177e4
LT		 3031 int status;
3032
8a1636c4 3033 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3034 pnfs_commit_and_return_layout(inode);
8a1636c4 3035
0e574af1 3036 nfs_fattr_init(fattr);
1da177e4 3037
2669940d
AA		 3038 /* Deal with open(O_TRUNC) */
3039 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3040 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3041
3042 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3043 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3044 return 0;
3045
d530838b 3046 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3047 if (sattr->ia_valid & ATTR_FILE) {
3048 struct nfs_open_context *ctx;
3049
3050 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3051 if (ctx) {
3052 cred = ctx->cred;
3053 state = ctx->state;
3054 }
659bfcd6 3055 }
08e9eac4 3056
14c43f76
DQ		 3057 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3058 if (IS_ERR(label))
3059 return PTR_ERR(label);
3060
3061 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3062 if (status == 0) {
65e4308d 3063 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3064 nfs_setsecurity(inode, fattr, label);
3065 }
14c43f76 3066 nfs4_label_free(label);
1da177e4
LT		 3067 return status;
3068}
3069
0c2e53f1
TM		 3070static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3071 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3072 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3073{
0c2e53f1 3074 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3075 int status;
3076 struct nfs4_lookup_arg args = {
3077 .bitmask = server->attr_bitmask,
0c2e53f1 3078 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3079 .name = name,
3080 };
3081 struct nfs4_lookup_res res = {
3082 .server = server,
3083 .fattr = fattr,
aa9c2669 3084 .label = label,
2b3de441
DH		 3085 .fh = fhandle,
3086 };
3087 struct rpc_message msg = {
3088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3089 .rpc_argp = &args,
3090 .rpc_resp = &res,
3091 };
3092
aa9c2669
DQ		 3093 args.bitmask = nfs4_bitmask(server, label);
3094
2b3de441
DH		 3095 nfs_fattr_init(fattr);
3096
1da177e4 3097 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3098 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3099 dprintk("NFS reply lookup: %d\n", status);
3100 return status;
3101}
3102
72de53ec 3103static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3104{
7ebb9315 3105 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3106 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3107 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3108 fattr->nlink = 2;
3109}
3110
72de53ec
BS		 3111static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3112 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3113 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3114{
3115 struct nfs4_exception exception = { };
72de53ec 3116 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3117 int err;
3118 do {
1775fd3e 3119 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3120 trace_nfs4_lookup(dir, name, err);
72de53ec 3121 switch (err) {
08ef7bd3 3122 case -NFS4ERR_BADNAME:
72de53ec
BS		 3123 err = -ENOENT;
3124 goto out;
0c2e53f1 3125 case -NFS4ERR_MOVED:
f05d147f 3126 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3127 goto out;
0c2e53f1 3128 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3129 err = -EPERM;
3130 if (client != *clnt)
3131 goto out;
3132
3133 client = nfs4_create_sec_client(client, dir, name);
3134 if (IS_ERR(client))
3135 return PTR_ERR(client);
3136
3137 exception.retry = 1;
3138 break;
3139 default:
3140 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3141 }
1da177e4 3142 } while (exception.retry);
72de53ec
BS		 3143
3144out:
3145 if (err == 0)
3146 *clnt = client;
3147 else if (client != *clnt)
3148 rpc_shutdown_client(client);
3149
1da177e4
LT		 3150 return err;
3151}
3152
80a16b21 3153static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3154 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3155 struct nfs4_label *label)
72de53ec
BS		 3156{
3157 int status;
3158 struct rpc_clnt *client = NFS_CLIENT(dir);
3159
1775fd3e 3160 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3161 if (client != NFS_CLIENT(dir)) {
3162 rpc_shutdown_client(client);
3163 nfs_fixup_secinfo_attributes(fattr);
3164 }
3165 return status;
3166}
3167
f05d147f
BS		 3168struct rpc_clnt *
3169nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3170 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3171{
3172 int status;
3173 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3174
1775fd3e 3175 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3176 if (status < 0) {
3177 rpc_shutdown_client(client);
3178 return ERR_PTR(status);
3179 }
3180 return client;
3181}
3182
1da177e4
LT		 3183static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3184{
76b32999 3185 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3186 struct nfs4_accessargs args = {
3187 .fh = NFS_FH(inode),
a4980e78 3188 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3189 };
3190 struct nfs4_accessres res = {
3191 .server = server,
1da177e4 3192 };
1da177e4
LT		 3193 struct rpc_message msg = {
3194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3195 .rpc_argp = &args,
3196 .rpc_resp = &res,
3197 .rpc_cred = entry->cred,
3198 };
3199 int mode = entry->mask;
aa9c2669 3200 int status = 0;
1da177e4
LT		 3201
3202 /*
3203 * Determine which access bits we want to ask for...
3204 */
3205 if (mode & MAY_READ)
3206 args.access |= NFS4_ACCESS_READ;
3207 if (S_ISDIR(inode->i_mode)) {
3208 if (mode & MAY_WRITE)
3209 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3210 if (mode & MAY_EXEC)
3211 args.access |= NFS4_ACCESS_LOOKUP;
3212 } else {
3213 if (mode & MAY_WRITE)
3214 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3215 if (mode & MAY_EXEC)
3216 args.access |= NFS4_ACCESS_EXECUTE;
3217 }
c407d41a
TM		 3218
3219 res.fattr = nfs_alloc_fattr();
3220 if (res.fattr == NULL)
3221 return -ENOMEM;
3222
7c513058 3223 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3224 if (!status) {
6168f62c 3225 nfs_access_set_mask(entry, res.access);
c407d41a 3226 nfs_refresh_inode(inode, res.fattr);
1da177e4 3227 }
c407d41a 3228 nfs_free_fattr(res.fattr);
1da177e4
LT		 3229 return status;
3230}
3231
3232static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3233{
3234 struct nfs4_exception exception = { };
3235 int err;
3236 do {
c1578b76
TM		 3237 err = _nfs4_proc_access(inode, entry);
3238 trace_nfs4_access(inode, err);
3239 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3240 &exception);
3241 } while (exception.retry);
3242 return err;
3243}
3244
3245/*
3246 * TODO: For the time being, we don't try to get any attributes
3247 * along with any of the zero-copy operations READ, READDIR,
3248 * READLINK, WRITE.
3249 *
3250 * In the case of the first three, we want to put the GETATTR
3251 * after the read-type operation -- this is because it is hard
3252 * to predict the length of a GETATTR response in v4, and thus
3253 * align the READ data correctly. This means that the GETATTR
3254 * may end up partially falling into the page cache, and we should
3255 * shift it into the 'tail' of the xdr_buf before processing.
3256 * To do this efficiently, we need to know the total length
3257 * of data received, which doesn't seem to be available outside
3258 * of the RPC layer.
3259 *
3260 * In the case of WRITE, we also want to put the GETATTR after
3261 * the operation -- in this case because we want to make sure
140150db 3262 * we get the post-operation mtime and size.
1da177e4
LT		 3263 *
3264 * Both of these changes to the XDR layer would in fact be quite
3265 * minor, but I decided to leave them for a subsequent patch.
3266 */
3267static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3268 unsigned int pgbase, unsigned int pglen)
3269{
3270 struct nfs4_readlink args = {
3271 .fh = NFS_FH(inode),
3272 .pgbase = pgbase,
3273 .pglen = pglen,
3274 .pages = &page,
3275 };
f50c7000 3276 struct nfs4_readlink_res res;
1da177e4
LT		 3277 struct rpc_message msg = {
3278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3279 .rpc_argp = &args,
f50c7000 3280 .rpc_resp = &res,
1da177e4
LT		 3281 };
3282
7c513058 3283 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3284}
3285
3286static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3287 unsigned int pgbase, unsigned int pglen)
3288{
3289 struct nfs4_exception exception = { };
3290 int err;
3291 do {
c1578b76
TM		 3292 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3293 trace_nfs4_readlink(inode, err);
3294 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3295 &exception);
3296 } while (exception.retry);
3297 return err;
3298}
3299
1da177e4 3300/*
8867fe58 3301 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3302 */
1da177e4
LT		 3303static int
3304nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3305 int flags)
1da177e4 3306{
aa9c2669 3307 struct nfs4_label l, *ilabel = NULL;
8867fe58 3308 struct nfs_open_context *ctx;
1da177e4 3309 struct nfs4_state *state;
1da177e4
LT		 3310 int status = 0;
3311
8867fe58
MS		 3312 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3313 if (IS_ERR(ctx))
3314 return PTR_ERR(ctx);
3315
aa9c2669
DQ		 3316 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3317
a8a5da99 3318 sattr->ia_mode &= ~current_umask();
959d921f 3319 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3320 if (IS_ERR(state)) {
3321 status = PTR_ERR(state);
c0204fd2 3322 goto out;
1da177e4 3323 }
1da177e4 3324out:
aa9c2669 3325 nfs4_label_release_security(ilabel);
8867fe58 3326 put_nfs_open_context(ctx);
1da177e4
LT		 3327 return status;
3328}
3329
3330static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3331{
16e42959 3332 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3333 struct nfs_removeargs args = {
1da177e4 3334 .fh = NFS_FH(dir),
26fe5750 3335 .name = *name,
16e42959 3336 };
4fdc17b2 3337 struct nfs_removeres res = {
16e42959 3338 .server = server,
1da177e4 3339 };
1da177e4 3340 struct rpc_message msg = {
4fdc17b2
TM		 3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3342 .rpc_argp = &args,
3343 .rpc_resp = &res,
1da177e4 3344 };
778d2817 3345 int status;
1da177e4 3346
7c513058 3347 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3348 if (status == 0)
16e42959 3349 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3350 return status;
3351}
3352
3353static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3354{
3355 struct nfs4_exception exception = { };
3356 int err;
3357 do {
078ea3df
TM		 3358 err = _nfs4_proc_remove(dir, name);
3359 trace_nfs4_remove(dir, name, err);
3360 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3361 &exception);
3362 } while (exception.retry);
3363 return err;
3364}
3365
e4eff1a6 3366static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3367{
e4eff1a6
TM		 3368 struct nfs_server *server = NFS_SERVER(dir);
3369 struct nfs_removeargs *args = msg->rpc_argp;
3370 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3371
e4eff1a6 3372 res->server = server;
1da177e4 3373 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3374 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3375
3376 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3377}
3378
34e137cc
BS		 3379static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3380{
d9afbd1b
TM		 3381 nfs4_setup_sequence(NFS_SERVER(data->dir),
3382 &data->args.seq_args,
3383 &data->res.seq_res,
3384 task);
1da177e4
LT		 3385}
3386
e4eff1a6 3387static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3388{
078ea3df
TM		 3389 struct nfs_unlinkdata *data = task->tk_calldata;
3390 struct nfs_removeres *res = &data->res;
e4eff1a6 3391
14516c3a
TM		 3392 if (!nfs4_sequence_done(task, &res->seq_res))
3393 return 0;
9e33bed5 3394 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3395 return 0;
3396 update_changeattr(dir, &res->cinfo);
e4eff1a6 3397 return 1;
1da177e4
LT		 3398}
3399
d3d4152a
JL		 3400static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3401{
3402 struct nfs_server *server = NFS_SERVER(dir);
3403 struct nfs_renameargs *arg = msg->rpc_argp;
3404 struct nfs_renameres *res = msg->rpc_resp;
3405
3406 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3407 res->server = server;
a9c92d6b 3408 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3409}
3410
c6bfa1a1
BS		 3411static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3412{
d9afbd1b
TM		 3413 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3414 &data->args.seq_args,
3415 &data->res.seq_res,
3416 task);
d3d4152a
JL		 3417}
3418
3419static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3420 struct inode *new_dir)
3421{
fbc6f7c2
TM		 3422 struct nfs_renamedata *data = task->tk_calldata;
3423 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3424
3425 if (!nfs4_sequence_done(task, &res->seq_res))
3426 return 0;
3427 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3428 return 0;
3429
3430 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3431 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3432 return 1;
3433}
3434
1da177e4
LT		 3435static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3436 struct inode *new_dir, struct qstr *new_name)
3437{
6caf2c82 3438 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3439 struct nfs_renameargs arg = {
1da177e4
LT		 3440 .old_dir = NFS_FH(old_dir),
3441 .new_dir = NFS_FH(new_dir),
3442 .old_name = old_name,
3443 .new_name = new_name,
6caf2c82 3444 };
e8582a8b 3445 struct nfs_renameres res = {
6caf2c82 3446 .server = server,
1da177e4 3447 };
1da177e4
LT		 3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3450 .rpc_argp = &arg,
3451 .rpc_resp = &res,
3452 };
011fff72 3453 int status = -ENOMEM;
14c43f76 3454
7c513058 3455 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3456 if (!status) {
3457 update_changeattr(old_dir, &res.old_cinfo);
3458 update_changeattr(new_dir, &res.new_cinfo);
3459 }
3460 return status;
3461}
3462
3463static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3464 struct inode *new_dir, struct qstr *new_name)
3465{
3466 struct nfs4_exception exception = { };
3467 int err;
3468 do {
fbc6f7c2
TM		 3469 err = _nfs4_proc_rename(old_dir, old_name,
3470 new_dir, new_name);
3471 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3472 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3473 &exception);
3474 } while (exception.retry);
3475 return err;
3476}
3477
3478static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3479{
91ba2eee 3480 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3481 struct nfs4_link_arg arg = {
3482 .fh = NFS_FH(inode),
3483 .dir_fh = NFS_FH(dir),
3484 .name = name,
91ba2eee
TM		 3485 .bitmask = server->attr_bitmask,
3486 };
91ba2eee
TM		 3487 struct nfs4_link_res res = {
3488 .server = server,
1775fd3e 3489 .label = NULL,
1da177e4 3490 };
1da177e4
LT		 3491 struct rpc_message msg = {
3492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3493 .rpc_argp = &arg,
91ba2eee 3494 .rpc_resp = &res,
1da177e4 3495 };
136f2627
TM		 3496 int status = -ENOMEM;
3497
3498 res.fattr = nfs_alloc_fattr();
778d2817 3499 if (res.fattr == NULL)
136f2627 3500 goto out;
1da177e4 3501
14c43f76
DQ		 3502 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3503 if (IS_ERR(res.label)) {
3504 status = PTR_ERR(res.label);
3505 goto out;
3506 }
aa9c2669 3507 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3508
7c513058 3509 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3510 if (!status) {
3511 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3512 status = nfs_post_op_update_inode(inode, res.fattr);
3513 if (!status)
3514 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3515 }
14c43f76
DQ		 3516
3517
3518 nfs4_label_free(res.label);
3519
136f2627 3520out:
136f2627 3521 nfs_free_fattr(res.fattr);
1da177e4
LT		 3522 return status;
3523}
3524
3525static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3526{
3527 struct nfs4_exception exception = { };
3528 int err;
3529 do {
3530 err = nfs4_handle_exception(NFS_SERVER(inode),
3531 _nfs4_proc_link(inode, dir, name),
3532 &exception);
3533 } while (exception.retry);
3534 return err;
3535}
3536
57dc9a57
TM		 3537struct nfs4_createdata {
3538 struct rpc_message msg;
3539 struct nfs4_create_arg arg;
3540 struct nfs4_create_res res;
3541 struct nfs_fh fh;
3542 struct nfs_fattr fattr;
1775fd3e 3543 struct nfs4_label *label;
57dc9a57
TM		 3544};
3545
3546static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3547 struct qstr *name, struct iattr *sattr, u32 ftype)
3548{
3549 struct nfs4_createdata *data;
3550
3551 data = kzalloc(sizeof(*data), GFP_KERNEL);
3552 if (data != NULL) {
3553 struct nfs_server *server = NFS_SERVER(dir);
3554
14c43f76
DQ		 3555 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3556 if (IS_ERR(data->label))
3557 goto out_free;
3558
57dc9a57
TM		 3559 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3560 data->msg.rpc_argp = &data->arg;
3561 data->msg.rpc_resp = &data->res;
3562 data->arg.dir_fh = NFS_FH(dir);
3563 data->arg.server = server;
3564 data->arg.name = name;
3565 data->arg.attrs = sattr;
3566 data->arg.ftype = ftype;
aa9c2669 3567 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3568 data->res.server = server;
3569 data->res.fh = &data->fh;
3570 data->res.fattr = &data->fattr;
1775fd3e 3571 data->res.label = data->label;
57dc9a57 3572 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3573 }
3574 return data;
14c43f76
DQ		 3575out_free:
3576 kfree(data);
3577 return NULL;
57dc9a57
TM		 3578}
3579
3580static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3581{
7c513058 3582 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3583 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3584 if (status == 0) {
3585 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3586 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3587 }
3588 return status;
3589}
3590
3591static void nfs4_free_createdata(struct nfs4_createdata *data)
3592{
14c43f76 3593 nfs4_label_free(data->label);
57dc9a57
TM		 3594 kfree(data);
3595}
3596
4f390c15 3597static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3598 struct page *page, unsigned int len, struct iattr *sattr,
3599 struct nfs4_label *label)
1da177e4 3600{
57dc9a57
TM		 3601 struct nfs4_createdata *data;
3602 int status = -ENAMETOOLONG;
1da177e4 3603
94a6d753 3604 if (len > NFS4_MAXPATHLEN)
57dc9a57 3605 goto out;
4f390c15 3606
57dc9a57
TM		 3607 status = -ENOMEM;
3608 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3609 if (data == NULL)
3610 goto out;
3611
3612 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3613 data->arg.u.symlink.pages = &page;
3614 data->arg.u.symlink.len = len;
1775fd3e 3615 data->arg.label = label;
1da177e4 3616
57dc9a57
TM		 3617 status = nfs4_do_create(dir, dentry, data);
3618
3619 nfs4_free_createdata(data);
3620out:
1da177e4
LT		 3621 return status;
3622}
3623
4f390c15 3624static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3625 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3626{
3627 struct nfs4_exception exception = { };
aa9c2669 3628 struct nfs4_label l, *label = NULL;
1da177e4 3629 int err;
aa9c2669
DQ		 3630
3631 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3632
1da177e4 3633 do {
078ea3df
TM		 3634 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3635 trace_nfs4_symlink(dir, &dentry->d_name, err);
3636 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3637 &exception);
3638 } while (exception.retry);
aa9c2669
DQ		 3639
3640 nfs4_label_release_security(label);
1da177e4
LT		 3641 return err;
3642}
3643
3644static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3645 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3646{
57dc9a57
TM		 3647 struct nfs4_createdata *data;
3648 int status = -ENOMEM;
1da177e4 3649
57dc9a57
TM		 3650 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3651 if (data == NULL)
3652 goto out;
3653
1775fd3e 3654 data->arg.label = label;
57dc9a57
TM		 3655 status = nfs4_do_create(dir, dentry, data);
3656
3657 nfs4_free_createdata(data);
3658out:
1da177e4
LT		 3659 return status;
3660}
3661
3662static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3663 struct iattr *sattr)
3664{
3665 struct nfs4_exception exception = { };
aa9c2669 3666 struct nfs4_label l, *label = NULL;
1da177e4 3667 int err;
a8a5da99 3668
aa9c2669
DQ		 3669 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3670
a8a5da99 3671 sattr->ia_mode &= ~current_umask();
1da177e4 3672 do {
078ea3df
TM		 3673 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3674 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3675 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3676 &exception);
3677 } while (exception.retry);
aa9c2669
DQ		 3678 nfs4_label_release_security(label);
3679
1da177e4
LT		 3680 return err;
3681}
3682
3683static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3684 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3685{
3686 struct inode *dir = dentry->d_inode;
3687 struct nfs4_readdir_arg args = {
3688 .fh = NFS_FH(dir),
56e4ebf8 3689 .pages = pages,
1da177e4
LT		 3690 .pgbase = 0,
3691 .count = count,
96d25e53 3692 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3693 .plus = plus,
1da177e4
LT		 3694 };
3695 struct nfs4_readdir_res res;
3696 struct rpc_message msg = {
3697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3698 .rpc_argp = &args,
3699 .rpc_resp = &res,
3700 .rpc_cred = cred,
3701 };
3702 int status;
3703
3110ff80 3704 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3705 dentry->d_parent->d_name.name,
3706 dentry->d_name.name,
3707 (unsigned long long)cookie);
c3f52af3 3708 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3709 res.pgbase = args.pgbase;
7c513058 3710 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3711 if (status >= 0) {
c3f52af3 3712 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3713 status += args.pgbase;
3714 }
c4812998
TM		 3715
3716 nfs_invalidate_atime(dir);
3717
3110ff80 3718 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3719 return status;
3720}
3721
3722static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3723 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3724{
3725 struct nfs4_exception exception = { };
3726 int err;
3727 do {
c1578b76
TM		 3728 err = _nfs4_proc_readdir(dentry, cred, cookie,
3729 pages, count, plus);
3730 trace_nfs4_readdir(dentry->d_inode, err);
3731 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3732 &exception);
3733 } while (exception.retry);
3734 return err;
3735}
3736
3737static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3738 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3739{
57dc9a57
TM		 3740 struct nfs4_createdata *data;
3741 int mode = sattr->ia_mode;
3742 int status = -ENOMEM;
1da177e4 3743
57dc9a57
TM		 3744 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3745 if (data == NULL)
3746 goto out;
3747
1da177e4 3748 if (S_ISFIFO(mode))
57dc9a57 3749 data->arg.ftype = NF4FIFO;
1da177e4 3750 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3751 data->arg.ftype = NF4BLK;
3752 data->arg.u.device.specdata1 = MAJOR(rdev);
3753 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3754 }
3755 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3756 data->arg.ftype = NF4CHR;
3757 data->arg.u.device.specdata1 = MAJOR(rdev);
3758 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3759 } else if (!S_ISSOCK(mode)) {
3760 status = -EINVAL;
3761 goto out_free;
1da177e4 3762 }
1775fd3e 3763
aa9c2669 3764 data->arg.label = label;
57dc9a57 3765 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3766out_free:
57dc9a57
TM		 3767 nfs4_free_createdata(data);
3768out:
1da177e4
LT		 3769 return status;
3770}
3771
3772static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3773 struct iattr *sattr, dev_t rdev)
3774{
3775 struct nfs4_exception exception = { };
aa9c2669 3776 struct nfs4_label l, *label = NULL;
1da177e4 3777 int err;
a8a5da99 3778
aa9c2669
DQ		 3779 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3780
a8a5da99 3781 sattr->ia_mode &= ~current_umask();
1da177e4 3782 do {
078ea3df
TM		 3783 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3784 trace_nfs4_mknod(dir, &dentry->d_name, err);
3785 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3786 &exception);
3787 } while (exception.retry);
aa9c2669
DQ		 3788
3789 nfs4_label_release_security(label);
3790
1da177e4
LT		 3791 return err;
3792}
3793
3794static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3795 struct nfs_fsstat *fsstat)
3796{
3797 struct nfs4_statfs_arg args = {
3798 .fh = fhandle,
3799 .bitmask = server->attr_bitmask,
3800 };
24ad148a
BH		 3801 struct nfs4_statfs_res res = {
3802 .fsstat = fsstat,
3803 };
1da177e4
LT		 3804 struct rpc_message msg = {
3805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3806 .rpc_argp = &args,
24ad148a 3807 .rpc_resp = &res,
1da177e4
LT		 3808 };
3809
0e574af1 3810 nfs_fattr_init(fsstat->fattr);
7c513058 3811 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3812}
3813
3814static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3815{
3816 struct nfs4_exception exception = { };
3817 int err;
3818 do {
3819 err = nfs4_handle_exception(server,
3820 _nfs4_proc_statfs(server, fhandle, fsstat),
3821 &exception);
3822 } while (exception.retry);
3823 return err;
3824}
3825
3826static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3827 struct nfs_fsinfo *fsinfo)
3828{
3829 struct nfs4_fsinfo_arg args = {
3830 .fh = fhandle,
3831 .bitmask = server->attr_bitmask,
3832 };
3dda5e43
BH		 3833 struct nfs4_fsinfo_res res = {
3834 .fsinfo = fsinfo,
3835 };
1da177e4
LT		 3836 struct rpc_message msg = {
3837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3838 .rpc_argp = &args,
3dda5e43 3839 .rpc_resp = &res,
1da177e4
LT		 3840 };
3841
7c513058 3842 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3843}
3844
3845static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3846{
3847 struct nfs4_exception exception = { };
83ca7f5a 3848 unsigned long now = jiffies;
1da177e4
LT		 3849 int err;
3850
3851 do {
83ca7f5a 3852 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3853 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3854 if (err == 0) {
3855 struct nfs_client *clp = server->nfs_client;
3856
3857 spin_lock(&clp->cl_lock);
3858 clp->cl_lease_time = fsinfo->lease_time * HZ;
3859 clp->cl_last_renewal = now;
3860 spin_unlock(&clp->cl_lock);
3861 break;
3862 }
3863 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3864 } while (exception.retry);
3865 return err;
3866}
3867
3868static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3869{
e38eb650
BS		 3870 int error;
3871
0e574af1 3872 nfs_fattr_init(fsinfo->fattr);
e38eb650 3873 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3874 if (error == 0) {
3875 /* block layout checks this! */
3876 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3877 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3878 }
e38eb650
BS		 3879
3880 return error;
1da177e4
LT		 3881}
3882
3883static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3884 struct nfs_pathconf *pathconf)
3885{
3886 struct nfs4_pathconf_arg args = {
3887 .fh = fhandle,
3888 .bitmask = server->attr_bitmask,
3889 };
d45b2989
BH		 3890 struct nfs4_pathconf_res res = {
3891 .pathconf = pathconf,
3892 };
1da177e4
LT		 3893 struct rpc_message msg = {
3894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3895 .rpc_argp = &args,
d45b2989 3896 .rpc_resp = &res,
1da177e4
LT		 3897 };
3898
3899 /* None of the pathconf attributes are mandatory to implement */
3900 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3901 memset(pathconf, 0, sizeof(*pathconf));
3902 return 0;
3903 }
3904
0e574af1 3905 nfs_fattr_init(pathconf->fattr);
7c513058 3906 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3907}
3908
3909static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3910 struct nfs_pathconf *pathconf)
3911{
3912 struct nfs4_exception exception = { };
3913 int err;
3914
3915 do {
3916 err = nfs4_handle_exception(server,
3917 _nfs4_proc_pathconf(server, fhandle, pathconf),
3918 &exception);
3919 } while (exception.retry);
3920 return err;
3921}
3922
5521abfd 3923int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3924 const struct nfs_open_context *ctx,
3925 const struct nfs_lock_context *l_ctx,
3926 fmode_t fmode)
3927{
3928 const struct nfs_lockowner *lockowner = NULL;
3929
3930 if (l_ctx != NULL)
3931 lockowner = &l_ctx->lockowner;
5521abfd 3932 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3933}
3934EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3935
5521abfd
TM		 3936static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3937 const struct nfs_open_context *ctx,
3938 const struct nfs_lock_context *l_ctx,
3939 fmode_t fmode)
3940{
3941 nfs4_stateid current_stateid;
3942
3943 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3944 return false;
3945 return nfs4_stateid_match(stateid, &current_stateid);
3946}
3947
3948static bool nfs4_error_stateid_expired(int err)
3949{
3950 switch (err) {
3951 case -NFS4ERR_DELEG_REVOKED:
3952 case -NFS4ERR_ADMIN_REVOKED:
3953 case -NFS4ERR_BAD_STATEID:
3954 case -NFS4ERR_STALE_STATEID:
3955 case -NFS4ERR_OLD_STATEID:
3956 case -NFS4ERR_OPENMODE:
3957 case -NFS4ERR_EXPIRED:
3958 return true;
3959 }
3960 return false;
3961}
3962
d20581aa
BH		 3963void __nfs4_read_done_cb(struct nfs_read_data *data)
3964{
cd841605 3965 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3966}
3967
cbdabc7f 3968static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3969{
cd841605 3970 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3971
cc668ab3 3972 trace_nfs4_read(data, task->tk_status);
9e33bed5 3973 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3974 rpc_restart_call_prepare(task);
ec06c096 3975 return -EAGAIN;
1da177e4 3976 }
8850df99 3977
d20581aa 3978 __nfs4_read_done_cb(data);
1da177e4 3979 if (task->tk_status > 0)
ec06c096
TM		 3980 renew_lease(server, data->timestamp);
3981 return 0;
1da177e4
LT		 3982}
3983
5521abfd
TM		 3984static bool nfs4_read_stateid_changed(struct rpc_task *task,
3985 struct nfs_readargs *args)
3986{
3987
3988 if (!nfs4_error_stateid_expired(task->tk_status) ||
3989 nfs4_stateid_is_current(&args->stateid,
3990 args->context,
3991 args->lock_context,
3992 FMODE_READ))
3993 return false;
3994 rpc_restart_call_prepare(task);
3995 return true;
3996}
3997
cbdabc7f
AA		 3998static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3999{
4000
4001 dprintk("--> %s\n", __func__);
4002
4003 if (!nfs4_sequence_done(task, &data->res.seq_res))
4004 return -EAGAIN;
5521abfd
TM		 4005 if (nfs4_read_stateid_changed(task, &data->args))
4006 return -EAGAIN;
d20581aa
BH		 4007 return data->read_done_cb ? data->read_done_cb(task, data) :
4008 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4009}
4010
bdc7f021 4011static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4012{
1da177e4 4013 data->timestamp = jiffies;
cbdabc7f 4014 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4015 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4016 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4017}
4018
ea7c3303
BS		 4019static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
4020{
9b206149 4021 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4022 &data->args.seq_args,
4023 &data->res.seq_res,
9b206149
TM		 4024 task))
4025 return;
4026 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4027 data->args.lock_context, FMODE_READ);
1da177e4
LT		 4028}
4029
b029bc9b 4030static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4031{
cd841605 4032 struct inode *inode = data->header->inode;
1da177e4 4033
cc668ab3 4034 trace_nfs4_write(data, task->tk_status);
9e33bed5 4035 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4036 rpc_restart_call_prepare(task);
788e7a89 4037 return -EAGAIN;
1da177e4 4038 }
4f9838c7 4039 if (task->tk_status >= 0) {
1da177e4 4040 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4041 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4042 }
788e7a89 4043 return 0;
1da177e4
LT		 4044}
4045
5521abfd
TM		 4046static bool nfs4_write_stateid_changed(struct rpc_task *task,
4047 struct nfs_writeargs *args)
4048{
4049
4050 if (!nfs4_error_stateid_expired(task->tk_status) ||
4051 nfs4_stateid_is_current(&args->stateid,
4052 args->context,
4053 args->lock_context,
4054 FMODE_WRITE))
4055 return false;
4056 rpc_restart_call_prepare(task);
4057 return true;
4058}
4059
b029bc9b
FI		 4060static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4061{
4062 if (!nfs4_sequence_done(task, &data->res.seq_res))
4063 return -EAGAIN;
5521abfd
TM		 4064 if (nfs4_write_stateid_changed(task, &data->args))
4065 return -EAGAIN;
d20581aa
BH		 4066 return data->write_done_cb ? data->write_done_cb(task, data) :
4067 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4068}
4069
5a37f851
TM		 4070static
4071bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4072{
5a37f851
TM		 4073 const struct nfs_pgio_header *hdr = data->header;
4074
4075 /* Don't request attributes for pNFS or O_DIRECT writes */
4076 if (data->ds_clp != NULL || hdr->dreq != NULL)
4077 return false;
4078 /* Otherwise, request attributes if and only if we don't hold
4079 * a delegation
4080 */
011e2a7f 4081 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4082}
a69aef14 4083
bdc7f021 4084static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4085{
cd841605 4086 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4087
5a37f851 4088 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4089 data->args.bitmask = NULL;
4090 data->res.fattr = NULL;
4091 } else
4092 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4093
b029bc9b
FI		 4094 if (!data->write_done_cb)
4095 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4096 data->res.server = server;
1da177e4
LT		 4097 data->timestamp = jiffies;
4098
bdc7f021 4099 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4100 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4101}
4102
c6cb80d0
BS		 4103static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4104{
9b206149 4105 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4106 &data->args.seq_args,
4107 &data->res.seq_res,
9b206149
TM		 4108 task))
4109 return;
4110 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4111 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4112}
4113
0b7c0153 4114static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4115{
d9afbd1b
TM		 4116 nfs4_setup_sequence(NFS_SERVER(data->inode),
4117 &data->args.seq_args,
4118 &data->res.seq_res,
4119 task);
1da177e4
LT		 4120}
4121
0b7c0153 4122static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4123{
1da177e4 4124 struct inode *inode = data->inode;
14516c3a 4125
cc668ab3 4126 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4127 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4128 rpc_restart_call_prepare(task);
788e7a89 4129 return -EAGAIN;
1da177e4 4130 }
788e7a89 4131 return 0;
1da177e4
LT		 4132}
4133
0b7c0153 4134static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4135{
4136 if (!nfs4_sequence_done(task, &data->res.seq_res))
4137 return -EAGAIN;
0b7c0153 4138 return data->commit_done_cb(task, data);
5f452431
FI		 4139}
4140
0b7c0153 4141static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4142{
788e7a89 4143 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4144
0b7c0153
FI		 4145 if (data->commit_done_cb == NULL)
4146 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4147 data->res.server = server;
bdc7f021 4148 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4149 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4150}
4151
9bc4e3ca
CL		 4152struct nfs4_renewdata {
4153 struct nfs_client *client;
4154 unsigned long timestamp;
4155};
4156
1da177e4
LT		 4157/*
4158 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4159 * standalone procedure for queueing an asynchronous RENEW.
4160 */
9bc4e3ca 4161static void nfs4_renew_release(void *calldata)
dc96aef9 4162{
9bc4e3ca
CL		 4163 struct nfs4_renewdata *data = calldata;
4164 struct nfs_client *clp = data->client;
dc96aef9 4165
0851de06
AB		 4166 if (atomic_read(&clp->cl_count) > 1)
4167 nfs4_schedule_state_renewal(clp);
4168 nfs_put_client(clp);
9bc4e3ca 4169 kfree(data);
dc96aef9
AB		 4170}
4171
9bc4e3ca 4172static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4173{
9bc4e3ca
CL		 4174 struct nfs4_renewdata *data = calldata;
4175 struct nfs_client *clp = data->client;
4176 unsigned long timestamp = data->timestamp;
1da177e4 4177
c6d01c6f 4178 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4179 if (task->tk_status < 0) {
95baa25c 4180 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4181 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4182 return;
4183 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4184 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4185 return;
4186 }
4187 nfs4_schedule_path_down_recovery(clp);
1da177e4 4188 }
452e9352 4189 do_renew_lease(clp, timestamp);
1da177e4
LT		 4190}
4191
963d8fe5
TM		 4192static const struct rpc_call_ops nfs4_renew_ops = {
4193 .rpc_call_done = nfs4_renew_done,
dc96aef9 4194 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4195};
4196
2f60ea6b 4197static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4198{
4199 struct rpc_message msg = {
4200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4201 .rpc_argp = clp,
b4454fe1 4202 .rpc_cred = cred,
1da177e4 4203 };
9bc4e3ca 4204 struct nfs4_renewdata *data;
1da177e4 4205
2f60ea6b
TM		 4206 if (renew_flags == 0)
4207 return 0;
0851de06
AB		 4208 if (!atomic_inc_not_zero(&clp->cl_count))
4209 return -EIO;
b569ad34 4210 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4211 if (data == NULL)
4212 return -ENOMEM;
4213 data->client = clp;
4214 data->timestamp = jiffies;
bc7a05ca 4215 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4216 &nfs4_renew_ops, data);
1da177e4
LT		 4217}
4218
8534d4ec 4219static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4220{
4221 struct rpc_message msg = {
4222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4223 .rpc_argp = clp,
b4454fe1 4224 .rpc_cred = cred,
1da177e4
LT		 4225 };
4226 unsigned long now = jiffies;
4227 int status;
4228
bc7a05ca 4229 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4230 if (status < 0)
4231 return status;
452e9352 4232 do_renew_lease(clp, now);
1da177e4
LT		 4233 return 0;
4234}
4235
aa1870af
BF		 4236static inline int nfs4_server_supports_acls(struct nfs_server *server)
4237{
4238 return (server->caps & NFS_CAP_ACLS)
4239 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4240 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4241}
4242
21f498c2
TM		 4243/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4244 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4245 * the stack.
4246 */
21f498c2 4247#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4248
e9e3d724
NH		 4249static int buf_to_pages_noslab(const void *buf, size_t buflen,
4250 struct page **pages, unsigned int *pgbase)
4251{
4252 struct page *newpage, **spages;
4253 int rc = 0;
4254 size_t len;
4255 spages = pages;
4256
4257 do {
21f498c2 4258 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4259 newpage = alloc_page(GFP_KERNEL);
4260
4261 if (newpage == NULL)
4262 goto unwind;
4263 memcpy(page_address(newpage), buf, len);
4264 buf += len;
4265 buflen -= len;
4266 *pages++ = newpage;
4267 rc++;
4268 } while (buflen != 0);
4269
4270 return rc;
4271
4272unwind:
4273 for(; rc > 0; rc--)
4274 __free_page(spages[rc-1]);
4275 return -ENOMEM;
4276}
4277
e50a1c2e
BF		 4278struct nfs4_cached_acl {
4279 int cached;
4280 size_t len;
3e9d4154 4281 char data[0];
e50a1c2e
BF		 4282};
4283
4284static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4285{
4286 struct nfs_inode *nfsi = NFS_I(inode);
4287
4288 spin_lock(&inode->i_lock);
4289 kfree(nfsi->nfs4_acl);
4290 nfsi->nfs4_acl = acl;
4291 spin_unlock(&inode->i_lock);
4292}
4293
4294static void nfs4_zap_acl_attr(struct inode *inode)
4295{
4296 nfs4_set_cached_acl(inode, NULL);
4297}
4298
4299static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4300{
4301 struct nfs_inode *nfsi = NFS_I(inode);
4302 struct nfs4_cached_acl *acl;
4303 int ret = -ENOENT;
4304
4305 spin_lock(&inode->i_lock);
4306 acl = nfsi->nfs4_acl;
4307 if (acl == NULL)
4308 goto out;
4309 if (buf == NULL) /* user is just asking for length */
4310 goto out_len;
4311 if (acl->cached == 0)
4312 goto out;
4313 ret = -ERANGE; /* see getxattr(2) man page */
4314 if (acl->len > buflen)
4315 goto out;
4316 memcpy(buf, acl->data, acl->len);
4317out_len:
4318 ret = acl->len;
4319out:
4320 spin_unlock(&inode->i_lock);
4321 return ret;
4322}
4323
5794d21e 4324static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4325{
4326 struct nfs4_cached_acl *acl;
b291f1b1 4327 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4328
1f1ea6c2 4329 if (buflen <= PAGE_SIZE) {
b291f1b1 4330 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4331 if (acl == NULL)
4332 goto out;
4333 acl->cached = 1;
5794d21e 4334 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4335 } else {
4336 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4337 if (acl == NULL)
4338 goto out;
4339 acl->cached = 0;
4340 }
4341 acl->len = acl_len;
4342out:
4343 nfs4_set_cached_acl(inode, acl);
4344}
4345
bf118a34
AA		 4346/*
4347 * The getxattr API returns the required buffer length when called with a
4348 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4349 * the required buf. On a NULL buf, we send a page of data to the server
4350 * guessing that the ACL request can be serviced by a page. If so, we cache
4351 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4352 * the cache. If not so, we throw away the page, and cache the required
4353 * length. The next getxattr call will then produce another round trip to
4354 * the server, this time with the input buf of the required size.
4355 */
16b4289c 4356static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4357{
bf118a34 4358 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4359 struct nfs_getaclargs args = {
4360 .fh = NFS_FH(inode),
4361 .acl_pages = pages,
4362 .acl_len = buflen,
4363 };
663c79b3
BH		 4364 struct nfs_getaclres res = {
4365 .acl_len = buflen,
4366 };
aa1870af
BF		 4367 struct rpc_message msg = {
4368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4369 .rpc_argp = &args,
663c79b3 4370 .rpc_resp = &res,
aa1870af 4371 };
21f498c2
TM		 4372 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4373 int ret = -ENOMEM, i;
aa1870af 4374
bf118a34
AA		 4375 /* As long as we're doing a round trip to the server anyway,
4376 * let's be prepared for a page of acl data. */
4377 if (npages == 0)
4378 npages = 1;
21f498c2
TM		 4379 if (npages > ARRAY_SIZE(pages))
4380 return -ERANGE;
5a006899 4381
bf118a34
AA		 4382 for (i = 0; i < npages; i++) {
4383 pages[i] = alloc_page(GFP_KERNEL);
4384 if (!pages[i])
4385 goto out_free;
e50a1c2e 4386 }
5a006899
SP		 4387
4388 /* for decoding across pages */
4389 res.acl_scratch = alloc_page(GFP_KERNEL);
4390 if (!res.acl_scratch)
4391 goto out_free;
4392
bf118a34
AA		 4393 args.acl_len = npages * PAGE_SIZE;
4394 args.acl_pgbase = 0;
5a006899 4395
de040bec 4396 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4397 __func__, buf, buflen, npages, args.acl_len);
4398 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4399 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4400 if (ret)
4401 goto out_free;
bf118a34 4402
1f1ea6c2
TM		 4403 /* Handle the case where the passed-in buffer is too short */
4404 if (res.acl_flags & NFS4_ACL_TRUNC) {
4405 /* Did the user only issue a request for the acl length? */
4406 if (buf == NULL)
4407 goto out_ok;
e50a1c2e 4408 ret = -ERANGE;
1f1ea6c2 4409 goto out_free;
e50a1c2e 4410 }
1f1ea6c2 4411 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4412 if (buf) {
4413 if (res.acl_len > buflen) {
4414 ret = -ERANGE;
4415 goto out_free;
4416 }
1f1ea6c2 4417 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4418 }
1f1ea6c2
TM		 4419out_ok:
4420 ret = res.acl_len;
e50a1c2e 4421out_free:
bf118a34
AA		 4422 for (i = 0; i < npages; i++)
4423 if (pages[i])
4424 __free_page(pages[i]);
331818f1
TM		 4425 if (res.acl_scratch)
4426 __free_page(res.acl_scratch);
aa1870af
BF		 4427 return ret;
4428}
4429
16b4289c
TM		 4430static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4431{
4432 struct nfs4_exception exception = { };
4433 ssize_t ret;
4434 do {
4435 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4436 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4437 if (ret >= 0)
4438 break;
4439 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4440 } while (exception.retry);
4441 return ret;
4442}
4443
e50a1c2e
BF		 4444static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4445{
4446 struct nfs_server *server = NFS_SERVER(inode);
4447 int ret;
4448
4449 if (!nfs4_server_supports_acls(server))
4450 return -EOPNOTSUPP;
4451 ret = nfs_revalidate_inode(server, inode);
4452 if (ret < 0)
4453 return ret;
08a22b39
AK		 4454 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4455 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4456 ret = nfs4_read_cached_acl(inode, buf, buflen);
4457 if (ret != -ENOENT)
bf118a34
AA		 4458 /* -ENOENT is returned if there is no ACL or if there is an ACL
4459 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4460 return ret;
4461 return nfs4_get_acl_uncached(inode, buf, buflen);
4462}
4463
16b4289c 4464static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4465{
4466 struct nfs_server *server = NFS_SERVER(inode);
4467 struct page *pages[NFS4ACL_MAXPAGES];
4468 struct nfs_setaclargs arg = {
4469 .fh = NFS_FH(inode),
4470 .acl_pages = pages,
4471 .acl_len = buflen,
4472 };
73c403a9 4473 struct nfs_setaclres res;
4b580ee3
BF		 4474 struct rpc_message msg = {
4475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4476 .rpc_argp = &arg,
73c403a9 4477 .rpc_resp = &res,
4b580ee3 4478 };
21f498c2 4479 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4480 int ret, i;
4b580ee3
BF		 4481
4482 if (!nfs4_server_supports_acls(server))
4483 return -EOPNOTSUPP;
21f498c2
TM		 4484 if (npages > ARRAY_SIZE(pages))
4485 return -ERANGE;
e9e3d724
NH		 4486 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4487 if (i < 0)
4488 return i;
57ec14c5 4489 nfs4_inode_return_delegation(inode);
7c513058 4490 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4491
4492 /*
4493 * Free each page after tx, so the only ref left is
4494 * held by the network stack
4495 */
4496 for (; i > 0; i--)
4497 put_page(pages[i-1]);
4498
08a22b39
AK		 4499 /*
4500 * Acl update can result in inode attribute update.
4501 * so mark the attribute cache invalid.
4502 */
4503 spin_lock(&inode->i_lock);
4504 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4505 spin_unlock(&inode->i_lock);
f41f7418
TM		 4506 nfs_access_zap_cache(inode);
4507 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4508 return ret;
4509}
4510
16b4289c
TM		 4511static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4512{
4513 struct nfs4_exception exception = { };
4514 int err;
4515 do {
c1578b76
TM		 4516 err = __nfs4_proc_set_acl(inode, buf, buflen);
4517 trace_nfs4_set_acl(inode, err);
4518 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4519 &exception);
4520 } while (exception.retry);
4521 return err;
4522}
4523
aa9c2669
DQ		 4524#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4525static int _nfs4_get_security_label(struct inode *inode, void *buf,
4526 size_t buflen)
4527{
4528 struct nfs_server *server = NFS_SERVER(inode);
4529 struct nfs_fattr fattr;
4530 struct nfs4_label label = {0, 0, buflen, buf};
4531
4532 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4533 struct nfs4_getattr_arg args = {
4534 .fh = NFS_FH(inode),
4535 .bitmask = bitmask,
4536 };
4537 struct nfs4_getattr_res res = {
4538 .fattr = &fattr,
4539 .label = &label,
4540 .server = server,
4541 };
4542 struct rpc_message msg = {
4543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4544 .rpc_argp = &args,
4545 .rpc_resp = &res,
4546 };
4547 int ret;
4548
4549 nfs_fattr_init(&fattr);
4550
4551 ret = rpc_call_sync(server->client, &msg, 0);
4552 if (ret)
4553 return ret;
4554 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4555 return -ENOENT;
4556 if (buflen < label.len)
4557 return -ERANGE;
4558 return 0;
4559}
4560
4561static int nfs4_get_security_label(struct inode *inode, void *buf,
4562 size_t buflen)
4563{
4564 struct nfs4_exception exception = { };
4565 int err;
4566
4567 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4568 return -EOPNOTSUPP;
4569
4570 do {
c1578b76
TM		 4571 err = _nfs4_get_security_label(inode, buf, buflen);
4572 trace_nfs4_get_security_label(inode, err);
4573 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4574 &exception);
4575 } while (exception.retry);
4576 return err;
4577}
4578
4579static int _nfs4_do_set_security_label(struct inode *inode,
4580 struct nfs4_label *ilabel,
4581 struct nfs_fattr *fattr,
4582 struct nfs4_label *olabel)
4583{
4584
4585 struct iattr sattr = {0};
4586 struct nfs_server *server = NFS_SERVER(inode);
4587 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4588 struct nfs_setattrargs args = {
4589 .fh = NFS_FH(inode),
4590 .iap = &sattr,
4591 .server = server,
4592 .bitmask = bitmask,
4593 .label = ilabel,
4594 };
4595 struct nfs_setattrres res = {
4596 .fattr = fattr,
4597 .label = olabel,
4598 .server = server,
4599 };
4600 struct rpc_message msg = {
4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4602 .rpc_argp = &args,
4603 .rpc_resp = &res,
4604 };
4605 int status;
4606
4607 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4608
4609 status = rpc_call_sync(server->client, &msg, 0);
4610 if (status)
4611 dprintk("%s failed: %d\n", __func__, status);
4612
4613 return status;
4614}
4615
4616static int nfs4_do_set_security_label(struct inode *inode,
4617 struct nfs4_label *ilabel,
4618 struct nfs_fattr *fattr,
4619 struct nfs4_label *olabel)
4620{
4621 struct nfs4_exception exception = { };
4622 int err;
4623
4624 do {
c1578b76
TM		 4625 err = _nfs4_do_set_security_label(inode, ilabel,
4626 fattr, olabel);
4627 trace_nfs4_set_security_label(inode, err);
4628 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4629 &exception);
4630 } while (exception.retry);
4631 return err;
4632}
4633
4634static int
4635nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4636{
4637 struct nfs4_label ilabel, *olabel = NULL;
4638 struct nfs_fattr fattr;
4639 struct rpc_cred *cred;
4640 struct inode *inode = dentry->d_inode;
4641 int status;
4642
4643 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4644 return -EOPNOTSUPP;
4645
4646 nfs_fattr_init(&fattr);
4647
4648 ilabel.pi = 0;
4649 ilabel.lfs = 0;
4650 ilabel.label = (char *)buf;
4651 ilabel.len = buflen;
4652
4653 cred = rpc_lookup_cred();
4654 if (IS_ERR(cred))
4655 return PTR_ERR(cred);
4656
4657 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4658 if (IS_ERR(olabel)) {
4659 status = -PTR_ERR(olabel);
4660 goto out;
4661 }
4662
4663 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4664 if (status == 0)
4665 nfs_setsecurity(inode, &fattr, olabel);
4666
4667 nfs4_label_free(olabel);
4668out:
4669 put_rpccred(cred);
4670 return status;
4671}
4672#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4673
4674
1da177e4 4675static int
aa5190d0 4676nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4677{
aa5190d0
TM		 4678 struct nfs_client *clp = server->nfs_client;
4679
4680 if (task->tk_status >= 0)
1da177e4
LT		 4681 return 0;
4682 switch(task->tk_status) {
a1d0b5ee 4683 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4684 case -NFS4ERR_ADMIN_REVOKED:
4685 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4686 if (state == NULL)
4687 break;
4688 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4689 case -NFS4ERR_OPENMODE:
4690 if (state == NULL)
4691 break;
5d422301
TM		 4692 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4693 goto stateid_invalid;
0400a6b0 4694 goto wait_on_recovery;
0ced63d1 4695 case -NFS4ERR_EXPIRED:
5d422301
TM		 4696 if (state != NULL) {
4697 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4698 goto stateid_invalid;
4699 }
1da177e4 4700 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4701 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4702 nfs4_schedule_lease_recovery(clp);
4703 goto wait_on_recovery;
4745e315
AA		 4704#if defined(CONFIG_NFS_V4_1)
4705 case -NFS4ERR_BADSESSION:
4706 case -NFS4ERR_BADSLOT:
4707 case -NFS4ERR_BAD_HIGH_SLOT:
4708 case -NFS4ERR_DEADSESSION:
4709 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4710 case -NFS4ERR_SEQ_FALSE_RETRY:
4711 case -NFS4ERR_SEQ_MISORDERED:
4712 dprintk("%s ERROR %d, Reset session\n", __func__,
4713 task->tk_status);
9f594791 4714 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4715 task->tk_status = 0;
4716 return -EAGAIN;
4717#endif /* CONFIG_NFS_V4_1 */
1da177e4 4718 case -NFS4ERR_DELAY:
aa5190d0 4719 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4720 case -NFS4ERR_GRACE:
1da177e4
LT		 4721 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4722 task->tk_status = 0;
4723 return -EAGAIN;
a8a4ae3a 4724 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4725 case -NFS4ERR_OLD_STATEID:
4726 task->tk_status = 0;
4727 return -EAGAIN;
4728 }
4729 task->tk_status = nfs4_map_errors(task->tk_status);
4730 return 0;
5d422301
TM		 4731stateid_invalid:
4732 task->tk_status = -EIO;
4733 return 0;
0400a6b0 4734wait_on_recovery:
a2c0b9e2 4735 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4736 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4737 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4738 task->tk_status = 0;
4739 return -EAGAIN;
1da177e4
LT		 4740}
4741
f092075d
CL		 4742static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4743 nfs4_verifier *bootverf)
cd93710e
CL		 4744{
4745 __be32 verf[2];
4746
2c820d9a
CL		 4747 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4748 /* An impossible timestamp guarantees this value
4749 * will never match a generated boot time. */
4750 verf[0] = 0;
17f26b12 4751 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4752 } else {
f092075d 4753 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4754 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4755 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4756 }
cd93710e
CL		 4757 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4758}
4759
e984a55a
CL		 4760static unsigned int
4761nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4762 char *buf, size_t len)
4763{
4764 unsigned int result;
4765
4766 rcu_read_lock();
4767 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4768 clp->cl_ipaddr,
4769 rpc_peeraddr2str(clp->cl_rpcclient,
4770 RPC_DISPLAY_ADDR),
4771 rpc_peeraddr2str(clp->cl_rpcclient,
4772 RPC_DISPLAY_PROTO));
4773 rcu_read_unlock();
4774 return result;
4775}
4776
4777static unsigned int
4778nfs4_init_uniform_client_string(const struct nfs_client *clp,
4779 char *buf, size_t len)
4780{
55b59293 4781 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4782
4783 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4784 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4785 clp->rpc_ops->version,
4786 clp->cl_minorversion,
4787 nfs4_client_id_uniquifier,
4788 nodename);
e984a55a
CL		 4789 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4790 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4791 nodename);
e984a55a
CL		 4792}
4793
6bbb4ae8
CL		 4794/**
4795 * nfs4_proc_setclientid - Negotiate client ID
4796 * @clp: state data structure
4797 * @program: RPC program for NFSv4 callback service
4798 * @port: IP port number for NFS4 callback service
4799 * @cred: RPC credential to use for this call
4800 * @res: where to place the result
4801 *
4802 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4803 */
bb8b27e5
TM		 4804int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4805 unsigned short port, struct rpc_cred *cred,
4806 struct nfs4_setclientid_res *res)
1da177e4
LT		 4807{
4808 nfs4_verifier sc_verifier;
4809 struct nfs4_setclientid setclientid = {
4810 .sc_verifier = &sc_verifier,
4811 .sc_prog = program,
f4eecd5d 4812 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4813 };
4814 struct rpc_message msg = {
4815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4816 .rpc_argp = &setclientid,
bb8b27e5 4817 .rpc_resp = res,
286d7d6a 4818 .rpc_cred = cred,
1da177e4 4819 };
6bbb4ae8 4820 int status;
1da177e4 4821
de734831 4822 /* nfs_client_id4 */
f092075d 4823 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4824 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4825 setclientid.sc_name_len =
4826 nfs4_init_uniform_client_string(clp,
4827 setclientid.sc_name,
4828 sizeof(setclientid.sc_name));
4829 else
4830 setclientid.sc_name_len =
4831 nfs4_init_nonuniform_client_string(clp,
4832 setclientid.sc_name,
4833 sizeof(setclientid.sc_name));
de734831 4834 /* cb_client4 */
e984a55a 4835 rcu_read_lock();
de734831 4836 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4837 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4838 rpc_peeraddr2str(clp->cl_rpcclient,
4839 RPC_DISPLAY_NETID));
de734831
CL		 4840 rcu_read_unlock();
4841 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4842 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4843 clp->cl_ipaddr, port >> 8, port & 255);
4844
6bbb4ae8
CL		 4845 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4846 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4847 setclientid.sc_name_len, setclientid.sc_name);
4848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4849 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4850 dprintk("NFS reply setclientid: %d\n", status);
4851 return status;
1da177e4
LT		 4852}
4853
6bbb4ae8
CL		 4854/**
4855 * nfs4_proc_setclientid_confirm - Confirm client ID
4856 * @clp: state data structure
4857 * @res: result of a previous SETCLIENTID
4858 * @cred: RPC credential to use for this call
4859 *
4860 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4861 */
fd954ae1 4862int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4863 struct nfs4_setclientid_res *arg,
4864 struct rpc_cred *cred)
1da177e4 4865{
1da177e4
LT		 4866 struct rpc_message msg = {
4867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4868 .rpc_argp = arg,
286d7d6a 4869 .rpc_cred = cred,
1da177e4 4870 };
1da177e4
LT		 4871 int status;
4872
6bbb4ae8
CL		 4873 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4874 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4875 clp->cl_clientid);
1bd714f2 4876 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4877 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4878 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4879 return status;
4880}
4881
fe650407
TM		 4882struct nfs4_delegreturndata {
4883 struct nfs4_delegreturnargs args;
fa178f29 4884 struct nfs4_delegreturnres res;
fe650407
TM		 4885 struct nfs_fh fh;
4886 nfs4_stateid stateid;
26e976a8 4887 unsigned long timestamp;
fa178f29 4888 struct nfs_fattr fattr;
fe650407
TM		 4889 int rpc_status;
4890};
4891
fe650407
TM		 4892static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4893{
4894 struct nfs4_delegreturndata *data = calldata;
938e1010 4895
14516c3a
TM		 4896 if (!nfs4_sequence_done(task, &data->res.seq_res))
4897 return;
938e1010 4898
ca8acf8d 4899 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4900 switch (task->tk_status) {
4901 case -NFS4ERR_STALE_STATEID:
4902 case -NFS4ERR_EXPIRED:
4903 case 0:
fa178f29 4904 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4905 break;
4906 default:
4907 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4908 -EAGAIN) {
d00c5d43 4909 rpc_restart_call_prepare(task);
79708861
RL		 4910 return;
4911 }
4912 }
4913 data->rpc_status = task->tk_status;
fe650407
TM		 4914}
4915
4916static void nfs4_delegreturn_release(void *calldata)
4917{
fe650407
TM		 4918 kfree(calldata);
4919}
4920
938e1010
AA		 4921static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4922{
4923 struct nfs4_delegreturndata *d_data;
4924
4925 d_data = (struct nfs4_delegreturndata *)data;
4926
d9afbd1b
TM		 4927 nfs4_setup_sequence(d_data->res.server,
4928 &d_data->args.seq_args,
4929 &d_data->res.seq_res,
4930 task);
938e1010 4931}
938e1010 4932
c8d149f3 4933static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4934 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4935 .rpc_call_done = nfs4_delegreturn_done,
4936 .rpc_release = nfs4_delegreturn_release,
4937};
4938
e6f81075 4939static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4940{
4941 struct nfs4_delegreturndata *data;
fa178f29 4942 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4943 struct rpc_task *task;
5138fde0
TM		 4944 struct rpc_message msg = {
4945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4946 .rpc_cred = cred,
4947 };
c970aa85
TM		 4948 struct rpc_task_setup task_setup_data = {
4949 .rpc_client = server->client,
5138fde0 4950 .rpc_message = &msg,
c970aa85
TM		 4951 .callback_ops = &nfs4_delegreturn_ops,
4952 .flags = RPC_TASK_ASYNC,
4953 };
e6f81075 4954 int status = 0;
fe650407 4955
8535b2be 4956 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4957 if (data == NULL)
4958 return -ENOMEM;
a9c92d6b 4959 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4960 data->args.fhandle = &data->fh;
4961 data->args.stateid = &data->stateid;
9e907fec 4962 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4963 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4964 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4965 data->res.fattr = &data->fattr;
4966 data->res.server = server;
5138fde0 4967 nfs_fattr_init(data->res.fattr);
26e976a8 4968 data->timestamp = jiffies;
fe650407
TM		 4969 data->rpc_status = 0;
4970
c970aa85 4971 task_setup_data.callback_data = data;
1174dd1f
TM		 4972 msg.rpc_argp = &data->args;
4973 msg.rpc_resp = &data->res;
c970aa85 4974 task = rpc_run_task(&task_setup_data);
7a1218a2 4975 if (IS_ERR(task))
fe650407 4976 return PTR_ERR(task);
e6f81075
TM		 4977 if (!issync)
4978 goto out;
fe650407 4979 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4980 if (status != 0)
4981 goto out;
4982 status = data->rpc_status;
e144cbcc
TM		 4983 if (status == 0)
4984 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4985 else
4986 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4987out:
e6b3c4db 4988 rpc_put_task(task);
fe650407 4989 return status;
1da177e4
LT		 4990}
4991
e6f81075 4992int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4993{
4994 struct nfs_server *server = NFS_SERVER(inode);
4995 struct nfs4_exception exception = { };
4996 int err;
4997 do {
e6f81075 4998 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4999 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5000 switch (err) {
5001 case -NFS4ERR_STALE_STATEID:
5002 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5003 case 0:
5004 return 0;
5005 }
5006 err = nfs4_handle_exception(server, err, &exception);
5007 } while (exception.retry);
5008 return err;
5009}
5010
5011#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5012#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5013
5014/*
5015 * sleep, with exponential backoff, and retry the LOCK operation.
5016 */
5017static unsigned long
5018nfs4_set_lock_task_retry(unsigned long timeout)
5019{
416ad3c9 5020 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5021 timeout <<= 1;
5022 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5023 return NFS4_LOCK_MAXTIMEOUT;
5024 return timeout;
5025}
5026
1da177e4
LT		 5027static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5028{
5029 struct inode *inode = state->inode;
5030 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5031 struct nfs_client *clp = server->nfs_client;
911d1aaf 5032 struct nfs_lockt_args arg = {
1da177e4 5033 .fh = NFS_FH(inode),
911d1aaf 5034 .fl = request,
1da177e4 5035 };
911d1aaf
TM		 5036 struct nfs_lockt_res res = {
5037 .denied = request,
1da177e4
LT		 5038 };
5039 struct rpc_message msg = {
5040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5041 .rpc_argp = &arg,
5042 .rpc_resp = &res,
5043 .rpc_cred = state->owner->so_cred,
5044 };
1da177e4
LT		 5045 struct nfs4_lock_state *lsp;
5046 int status;
5047
911d1aaf 5048 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5049 status = nfs4_set_lock_state(state, request);
5050 if (status != 0)
5051 goto out;
5052 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5053 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5054 arg.lock_owner.s_dev = server->s_dev;
7c513058 5055 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5056 switch (status) {
5057 case 0:
5058 request->fl_type = F_UNLCK;
5059 break;
5060 case -NFS4ERR_DENIED:
5061 status = 0;
1da177e4 5062 }
70cc6487 5063 request->fl_ops->fl_release_private(request);
8d0a8a9d 5064out:
1da177e4
LT		 5065 return status;
5066}
5067
5068static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5069{
5070 struct nfs4_exception exception = { };
5071 int err;
5072
5073 do {
d1b748a5
TM		 5074 err = _nfs4_proc_getlk(state, cmd, request);
5075 trace_nfs4_get_lock(request, state, cmd, err);
5076 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5077 &exception);
5078 } while (exception.retry);
5079 return err;
5080}
5081
5082static int do_vfs_lock(struct file *file, struct file_lock *fl)
5083{
5084 int res = 0;
5085 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5086 case FL_POSIX:
5087 res = posix_lock_file_wait(file, fl);
5088 break;
5089 case FL_FLOCK:
5090 res = flock_lock_file_wait(file, fl);
5091 break;
5092 default:
5093 BUG();
5094 }
1da177e4
LT		 5095 return res;
5096}
5097
faf5f49c 5098struct nfs4_unlockdata {
911d1aaf
TM		 5099 struct nfs_locku_args arg;
5100 struct nfs_locku_res res;
faf5f49c
TM		 5101 struct nfs4_lock_state *lsp;
5102 struct nfs_open_context *ctx;
911d1aaf
TM		 5103 struct file_lock fl;
5104 const struct nfs_server *server;
26e976a8 5105 unsigned long timestamp;
faf5f49c
TM		 5106};
5107
911d1aaf
TM		 5108static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5109 struct nfs_open_context *ctx,
5110 struct nfs4_lock_state *lsp,
5111 struct nfs_seqid *seqid)
5112{
5113 struct nfs4_unlockdata *p;
5114 struct inode *inode = lsp->ls_state->inode;
5115
8535b2be 5116 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5117 if (p == NULL)
5118 return NULL;
5119 p->arg.fh = NFS_FH(inode);
5120 p->arg.fl = &p->fl;
5121 p->arg.seqid = seqid;
c1d51931 5122 p->res.seqid = seqid;
911d1aaf
TM		 5123 p->arg.stateid = &lsp->ls_stateid;
5124 p->lsp = lsp;
5125 atomic_inc(&lsp->ls_count);
5126 /* Ensure we don't close file until we're done freeing locks! */
5127 p->ctx = get_nfs_open_context(ctx);
5128 memcpy(&p->fl, fl, sizeof(p->fl));
5129 p->server = NFS_SERVER(inode);
5130 return p;
5131}
5132
06f814a3 5133static void nfs4_locku_release_calldata(void *data)
faf5f49c 5134{
963d8fe5 5135 struct nfs4_unlockdata *calldata = data;
911d1aaf 5136 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5137 nfs4_put_lock_state(calldata->lsp);
5138 put_nfs_open_context(calldata->ctx);
5139 kfree(calldata);
faf5f49c
TM		 5140}
5141
963d8fe5 5142static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5143{
963d8fe5 5144 struct nfs4_unlockdata *calldata = data;
faf5f49c 5145
14516c3a
TM		 5146 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5147 return;
faf5f49c
TM		 5148 switch (task->tk_status) {
5149 case 0:
f597c537
TM		 5150 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5151 &calldata->res.stateid);
26e976a8 5152 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5153 break;
9e33bed5
TM		 5154 case -NFS4ERR_BAD_STATEID:
5155 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5156 case -NFS4ERR_STALE_STATEID:
5157 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5158 break;
5159 default:
9e33bed5 5160 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5161 rpc_restart_call_prepare(task);
faf5f49c 5162 }
2b1bc308 5163 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5164}
5165
4ce70ada 5166static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5167{
4ce70ada 5168 struct nfs4_unlockdata *calldata = data;
faf5f49c 5169
911d1aaf 5170 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5171 goto out_wait;
795a88c9 5172 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5173 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5174 goto out_no_action;
faf5f49c 5175 }
26e976a8 5176 calldata->timestamp = jiffies;
035168ab 5177 if (nfs4_setup_sequence(calldata->server,
a893693c 5178 &calldata->arg.seq_args,
2240a9e2
TM		 5179 &calldata->res.seq_res,
5180 task) != 0)
5181 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5182 return;
5183out_no_action:
5184 task->tk_action = NULL;
5185out_wait:
5186 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5187}
5188
963d8fe5 5189static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5190 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5191 .rpc_call_done = nfs4_locku_done,
06f814a3 5192 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5193};
5194
a5d16a4d
TM		 5195static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5196 struct nfs_open_context *ctx,
5197 struct nfs4_lock_state *lsp,
5198 struct nfs_seqid *seqid)
5199{
5200 struct nfs4_unlockdata *data;
5138fde0
TM		 5201 struct rpc_message msg = {
5202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5203 .rpc_cred = ctx->cred,
5204 };
c970aa85
TM		 5205 struct rpc_task_setup task_setup_data = {
5206 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5207 .rpc_message = &msg,
c970aa85 5208 .callback_ops = &nfs4_locku_ops,
101070ca 5209 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5210 .flags = RPC_TASK_ASYNC,
5211 };
a5d16a4d 5212
137d6aca
FF		 5213 /* Ensure this is an unlock - when canceling a lock, the
5214 * canceled lock is passed in, and it won't be an unlock.
5215 */
5216 fl->fl_type = F_UNLCK;
5217
a5d16a4d
TM		 5218 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5219 if (data == NULL) {
5220 nfs_free_seqid(seqid);
5221 return ERR_PTR(-ENOMEM);
5222 }
5223
a9c92d6b 5224 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5225 msg.rpc_argp = &data->arg;
5226 msg.rpc_resp = &data->res;
c970aa85
TM		 5227 task_setup_data.callback_data = data;
5228 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5229}
5230
faf5f49c
TM		 5231static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5232{
65b62a29
TM		 5233 struct inode *inode = state->inode;
5234 struct nfs4_state_owner *sp = state->owner;
5235 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5236 struct nfs_seqid *seqid;
1da177e4 5237 struct nfs4_lock_state *lsp;
06f814a3
TM		 5238 struct rpc_task *task;
5239 int status = 0;
536ff0f8 5240 unsigned char fl_flags = request->fl_flags;
faf5f49c 5241
8d0a8a9d 5242 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5243 /* Unlock _before_ we do the RPC call */
5244 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5245 /* Exclude nfs_delegation_claim_locks() */
5246 mutex_lock(&sp->so_delegreturn_mutex);
5247 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5248 down_read(&nfsi->rwsem);
5249 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5250 up_read(&nfsi->rwsem);
65b62a29 5251 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5252 goto out;
19e03c57
TM		 5253 }
5254 up_read(&nfsi->rwsem);
65b62a29 5255 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5256 if (status != 0)
9b073574
TM		 5257 goto out;
5258 /* Is this a delegated lock? */
8d0a8a9d 5259 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5260 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5261 goto out;
8535b2be 5262 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5263 status = -ENOMEM;
911d1aaf 5264 if (seqid == NULL)
9b073574 5265 goto out;
cd3758e3 5266 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5267 status = PTR_ERR(task);
5268 if (IS_ERR(task))
9b073574 5269 goto out;
a5d16a4d 5270 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5271 rpc_put_task(task);
9b073574 5272out:
536ff0f8 5273 request->fl_flags = fl_flags;
d1b748a5 5274 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5275 return status;
5276}
5277
a5d16a4d
TM		 5278struct nfs4_lockdata {
5279 struct nfs_lock_args arg;
5280 struct nfs_lock_res res;
5281 struct nfs4_lock_state *lsp;
5282 struct nfs_open_context *ctx;
5283 struct file_lock fl;
26e976a8 5284 unsigned long timestamp;
a5d16a4d
TM		 5285 int rpc_status;
5286 int cancelled;
66179efe 5287 struct nfs_server *server;
a5d16a4d
TM		 5288};
5289
5290static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5291 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5292 gfp_t gfp_mask)
1da177e4 5293{
a5d16a4d
TM		 5294 struct nfs4_lockdata *p;
5295 struct inode *inode = lsp->ls_state->inode;
1da177e4 5296 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5297
8535b2be 5298 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5299 if (p == NULL)
5300 return NULL;
5301
5302 p->arg.fh = NFS_FH(inode);
5303 p->arg.fl = &p->fl;
8535b2be 5304 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5305 if (p->arg.open_seqid == NULL)
5306 goto out_free;
8535b2be 5307 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5308 if (p->arg.lock_seqid == NULL)
2f74c0a0 5309 goto out_free_seqid;
a5d16a4d 5310 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5311 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5312 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5313 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5314 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5315 p->lsp = lsp;
66179efe 5316 p->server = server;
a5d16a4d
TM		 5317 atomic_inc(&lsp->ls_count);
5318 p->ctx = get_nfs_open_context(ctx);
5319 memcpy(&p->fl, fl, sizeof(p->fl));
5320 return p;
2f74c0a0
TM		 5321out_free_seqid:
5322 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5323out_free:
5324 kfree(p);
5325 return NULL;
5326}
5327
5328static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5329{
5330 struct nfs4_lockdata *data = calldata;
5331 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5332
3110ff80 5333 dprintk("%s: begin!\n", __func__);
2f74c0a0 5334 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5335 goto out_wait;
a5d16a4d
TM		 5336 /* Do we need to do an open_to_lock_owner? */
5337 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5338 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5339 goto out_release_lock_seqid;
8fe72bac 5340 }
8e472f33 5341 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5342 data->arg.new_lock_owner = 1;
c1d51931 5343 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5344 } else
5345 data->arg.new_lock_owner = 0;
5d422301
TM		 5346 if (!nfs4_valid_open_stateid(state)) {
5347 data->rpc_status = -EBADF;
5348 task->tk_action = NULL;
5349 goto out_release_open_seqid;
5350 }
26e976a8 5351 data->timestamp = jiffies;
035168ab
TM		 5352 if (nfs4_setup_sequence(data->server,
5353 &data->arg.seq_args,
2240a9e2 5354 &data->res.seq_res,
d9afbd1b 5355 task) == 0)
66179efe 5356 return;
5d422301 5357out_release_open_seqid:
2240a9e2
TM		 5358 nfs_release_seqid(data->arg.open_seqid);
5359out_release_lock_seqid:
5360 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5361out_wait:
5362 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5363 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5364}
5365
a5d16a4d
TM		 5366static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5367{
5368 struct nfs4_lockdata *data = calldata;
5369
3110ff80 5370 dprintk("%s: begin!\n", __func__);
a5d16a4d 5371
14516c3a
TM		 5372 if (!nfs4_sequence_done(task, &data->res.seq_res))
5373 return;
66179efe 5374
a5d16a4d 5375 data->rpc_status = task->tk_status;
a5d16a4d 5376 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5377 if (data->rpc_status == 0)
5378 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5379 else
5380 goto out;
5381 }
5382 if (data->rpc_status == 0) {
f597c537 5383 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5384 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5385 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5386 }
a5d16a4d 5387out:
3110ff80 5388 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5389}
5390
5391static void nfs4_lock_release(void *calldata)
5392{
5393 struct nfs4_lockdata *data = calldata;
5394
3110ff80 5395 dprintk("%s: begin!\n", __func__);
2f74c0a0 5396 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5397 if (data->cancelled != 0) {
5398 struct rpc_task *task;
5399 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5400 data->arg.lock_seqid);
5401 if (!IS_ERR(task))
bf294b41 5402 rpc_put_task_async(task);
3110ff80 5403 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5404 } else
5405 nfs_free_seqid(data->arg.lock_seqid);
5406 nfs4_put_lock_state(data->lsp);
5407 put_nfs_open_context(data->ctx);
5408 kfree(data);
3110ff80 5409 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5410}
5411
5412static const struct rpc_call_ops nfs4_lock_ops = {
5413 .rpc_call_prepare = nfs4_lock_prepare,
5414 .rpc_call_done = nfs4_lock_done,
5415 .rpc_release = nfs4_lock_release,
5416};
5417
2bee72a6
TM		 5418static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5419{
2bee72a6
TM		 5420 switch (error) {
5421 case -NFS4ERR_ADMIN_REVOKED:
5422 case -NFS4ERR_BAD_STATEID:
ecac799a 5423 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5424 if (new_lock_owner != 0 ||
795a88c9 5425 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5426 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5427 break;
5428 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5429 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5430 case -NFS4ERR_EXPIRED:
5431 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5432 };
5433}
5434
afe6c27c 5435static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5436{
5437 struct nfs4_lockdata *data;
5438 struct rpc_task *task;
5138fde0
TM		 5439 struct rpc_message msg = {
5440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5441 .rpc_cred = state->owner->so_cred,
5442 };
c970aa85
TM		 5443 struct rpc_task_setup task_setup_data = {
5444 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5445 .rpc_message = &msg,
c970aa85 5446 .callback_ops = &nfs4_lock_ops,
101070ca 5447 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5448 .flags = RPC_TASK_ASYNC,
5449 };
a5d16a4d
TM		 5450 int ret;
5451
3110ff80 5452 dprintk("%s: begin!\n", __func__);
cd3758e3 5453 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5454 fl->fl_u.nfs4_fl.owner,
5455 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5456 if (data == NULL)
5457 return -ENOMEM;
5458 if (IS_SETLKW(cmd))
5459 data->arg.block = 1;
a9c92d6b 5460 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5461 msg.rpc_argp = &data->arg;
5462 msg.rpc_resp = &data->res;
c970aa85 5463 task_setup_data.callback_data = data;
8fe72bac
TM		 5464 if (recovery_type > NFS_LOCK_NEW) {
5465 if (recovery_type == NFS_LOCK_RECLAIM)
5466 data->arg.reclaim = NFS_LOCK_RECLAIM;
5467 nfs4_set_sequence_privileged(&data->arg.seq_args);
5468 }
c970aa85 5469 task = rpc_run_task(&task_setup_data);
7a1218a2 5470 if (IS_ERR(task))
a5d16a4d 5471 return PTR_ERR(task);
a5d16a4d
TM		 5472 ret = nfs4_wait_for_completion_rpc_task(task);
5473 if (ret == 0) {
5474 ret = data->rpc_status;
2bee72a6
TM		 5475 if (ret)
5476 nfs4_handle_setlk_error(data->server, data->lsp,
5477 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5478 } else
5479 data->cancelled = 1;
e6b3c4db 5480 rpc_put_task(task);
3110ff80 5481 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5482 return ret;
1da177e4
LT		 5483}
5484
5485static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5486{
202b50dc 5487 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5488 struct nfs4_exception exception = {
5489 .inode = state->inode,
5490 };
202b50dc
TM		 5491 int err;
5492
5493 do {
42a2d13e
TM		 5494 /* Cache the lock if possible... */
5495 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5496 return 0;
afe6c27c 5497 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5498 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5499 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5500 break;
5501 nfs4_handle_exception(server, err, &exception);
5502 } while (exception.retry);
5503 return err;
1da177e4
LT		 5504}
5505
5506static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5507{
202b50dc 5508 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5509 struct nfs4_exception exception = {
5510 .inode = state->inode,
5511 };
202b50dc
TM		 5512 int err;
5513
6bfc93ef
TM		 5514 err = nfs4_set_lock_state(state, request);
5515 if (err != 0)
5516 return err;
202b50dc 5517 do {
42a2d13e
TM		 5518 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5519 return 0;
afe6c27c 5520 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5521 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5522 switch (err) {
5523 default:
5524 goto out;
5525 case -NFS4ERR_GRACE:
5526 case -NFS4ERR_DELAY:
5527 nfs4_handle_exception(server, err, &exception);
5528 err = 0;
5529 }
202b50dc 5530 } while (exception.retry);
a9ed2e25 5531out:
202b50dc 5532 return err;
1da177e4
LT		 5533}
5534
f062eb6c 5535#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5536/**
5537 * nfs41_check_expired_locks - possibly free a lock stateid
5538 *
5539 * @state: NFSv4 state for an inode
5540 *
5541 * Returns NFS_OK if recovery for this stateid is now finished.
5542 * Otherwise a negative NFS4ERR value is returned.
5543 */
b01dd1d8 5544static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5545{
eb64cf96 5546 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5547 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5548 struct nfs_server *server = NFS_SERVER(state->inode);
5549
b01dd1d8 5550 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5551 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5552 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5553
5554 status = nfs41_test_stateid(server,
5555 &lsp->ls_stateid,
5556 cred);
08cb47fa 5557 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5558 if (status != NFS_OK) {
3e60ffdd
CL		 5559 /* Free the stateid unless the server
5560 * informs us the stateid is unrecognized. */
89af2739
CL		 5561 if (status != -NFS4ERR_BAD_STATEID)
5562 nfs41_free_stateid(server,
ab7cb0df
TM		 5563 &lsp->ls_stateid,
5564 cred);
795a88c9 5565 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5566 ret = status;
5567 }
5568 }
5569 };
5570
5571 return ret;
5572}
5573
5574static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5575{
5576 int status = NFS_OK;
5577
5578 if (test_bit(LK_STATE_IN_USE, &state->flags))
5579 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5580 if (status != NFS_OK)
5581 status = nfs4_lock_expired(state, request);
5582 return status;
f062eb6c
BS		 5583}
5584#endif
5585
1da177e4
LT		 5586static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5587{
9a99af49 5588 struct nfs4_state_owner *sp = state->owner;
19e03c57 5589 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5590 unsigned char fl_flags = request->fl_flags;
9a99af49 5591 unsigned int seq;
8e469ebd 5592 int status = -ENOLCK;
1da177e4 5593
8e469ebd
TM		 5594 if ((fl_flags & FL_POSIX) &&
5595 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5596 goto out;
6bfc93ef 5597 /* Is this a delegated open? */
6bfc93ef
TM		 5598 status = nfs4_set_lock_state(state, request);
5599 if (status != 0)
5600 goto out;
01c3b861
TM		 5601 request->fl_flags |= FL_ACCESS;
5602 status = do_vfs_lock(request->fl_file, request);
5603 if (status < 0)
5604 goto out;
19e03c57 5605 down_read(&nfsi->rwsem);
01c3b861 5606 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5607 /* Yes: cache locks! */
01c3b861 5608 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5609 request->fl_flags = fl_flags & ~FL_SLEEP;
5610 status = do_vfs_lock(request->fl_file, request);
5611 goto out_unlock;
01c3b861 5612 }
9a99af49
TM		 5613 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5614 up_read(&nfsi->rwsem);
afe6c27c 5615 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5616 if (status != 0)
9a99af49
TM		 5617 goto out;
5618 down_read(&nfsi->rwsem);
5619 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5620 status = -NFS4ERR_DELAY;
01c3b861 5621 goto out_unlock;
9a99af49 5622 }
6bfc93ef 5623 /* Note: we always want to sleep here! */
01c3b861 5624 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5625 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5626 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5627 "manager!\n", __func__);
01c3b861 5628out_unlock:
19e03c57 5629 up_read(&nfsi->rwsem);
01c3b861
TM		 5630out:
5631 request->fl_flags = fl_flags;
1da177e4
LT		 5632 return status;
5633}
5634
5635static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5636{
a1d0b5ee
TM		 5637 struct nfs4_exception exception = {
5638 .state = state,
05ffe24f 5639 .inode = state->inode,
a1d0b5ee 5640 };
1da177e4
LT		 5641 int err;
5642
5643 do {
965b5d67 5644 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5645 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5646 if (err == -NFS4ERR_DENIED)
5647 err = -EAGAIN;
1da177e4 5648 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5649 err, &exception);
1da177e4
LT		 5650 } while (exception.retry);
5651 return err;
5652}
5653
5654static int
5655nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5656{
5657 struct nfs_open_context *ctx;
5658 struct nfs4_state *state;
5659 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5660 int status;
5661
5662 /* verify open state */
cd3758e3 5663 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5664 state = ctx->state;
5665
5666 if (request->fl_start < 0 || request->fl_end < 0)
5667 return -EINVAL;
5668
d953126a
TM		 5669 if (IS_GETLK(cmd)) {
5670 if (state != NULL)
5671 return nfs4_proc_getlk(state, F_GETLK, request);
5672 return 0;
5673 }
1da177e4
LT		 5674
5675 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5676 return -EINVAL;
5677
d953126a
TM		 5678 if (request->fl_type == F_UNLCK) {
5679 if (state != NULL)
5680 return nfs4_proc_unlck(state, cmd, request);
5681 return 0;
5682 }
1da177e4 5683
d953126a
TM		 5684 if (state == NULL)
5685 return -ENOLCK;
55725513
TM		 5686 /*
5687 * Don't rely on the VFS having checked the file open mode,
5688 * since it won't do this for flock() locks.
5689 */
f44106e2 5690 switch (request->fl_type) {
55725513
TM		 5691 case F_RDLCK:
5692 if (!(filp->f_mode & FMODE_READ))
5693 return -EBADF;
5694 break;
5695 case F_WRLCK:
5696 if (!(filp->f_mode & FMODE_WRITE))
5697 return -EBADF;
5698 }
5699
1da177e4
LT		 5700 do {
5701 status = nfs4_proc_setlk(state, cmd, request);
5702 if ((status != -EAGAIN) || IS_SETLK(cmd))
5703 break;
5704 timeout = nfs4_set_lock_task_retry(timeout);
5705 status = -ERESTARTSYS;
5706 if (signalled())
5707 break;
5708 } while(status < 0);
1da177e4
LT		 5709 return status;
5710}
5711
db4f2e63 5712int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5713{
5714 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5715 int err;
5716
5717 err = nfs4_set_lock_state(state, fl);
5718 if (err != 0)
db4f2e63 5719 return err;
4a706fa0 5720 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5721 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5722}
6b3b5496 5723
cf470c3e
TM		 5724struct nfs_release_lockowner_data {
5725 struct nfs4_lock_state *lsp;
5ae67c4f 5726 struct nfs_server *server;
cf470c3e
TM		 5727 struct nfs_release_lockowner_args args;
5728};
5729
d3c7b7cc
TM		 5730static void nfs4_release_lockowner_release(void *calldata)
5731{
cf470c3e 5732 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5733 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5734 kfree(calldata);
5735}
5736
17280175 5737static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5738 .rpc_release = nfs4_release_lockowner_release,
5739};
5740
c8b2d0bf 5741static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5742{
cf470c3e 5743 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5744 struct rpc_message msg = {
5745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5746 };
5747
5748 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5749 return -EINVAL;
5750 data = kmalloc(sizeof(*data), GFP_NOFS);
5751 if (!data)
5752 return -ENOMEM;
5753 data->lsp = lsp;
5ae67c4f 5754 data->server = server;
cf470c3e
TM		 5755 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5756 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5757 data->args.lock_owner.s_dev = server->s_dev;
5758 msg.rpc_argp = &data->args;
5759 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5760 return 0;
d3c7b7cc
TM		 5761}
5762
aa1870af
BF		 5763#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5764
64c2ce8b
AK		 5765static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5766 const void *buf, size_t buflen,
5767 int flags, int type)
6b3b5496 5768{
64c2ce8b
AK		 5769 if (strcmp(key, "") != 0)
5770 return -EINVAL;
4b580ee3 5771
64c2ce8b 5772 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5773}
5774
64c2ce8b
AK		 5775static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5776 void *buf, size_t buflen, int type)
6b3b5496 5777{
64c2ce8b
AK		 5778 if (strcmp(key, "") != 0)
5779 return -EINVAL;
aa1870af 5780
64c2ce8b 5781 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5782}
5783
64c2ce8b
AK		 5784static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5785 size_t list_len, const char *name,
5786 size_t name_len, int type)
6b3b5496 5787{
64c2ce8b 5788 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5789
096455a2
BF		 5790 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5791 return 0;
64c2ce8b
AK		 5792
5793 if (list && len <= list_len)
5794 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5795 return len;
6b3b5496
BF		 5796}
5797
c9bccef6
DQ		 5798#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5799static inline int nfs4_server_supports_labels(struct nfs_server *server)
5800{
5801 return server->caps & NFS_CAP_SECURITY_LABEL;
5802}
5803
5804static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5805 const void *buf, size_t buflen,
5806 int flags, int type)
5807{
5808 if (security_ismaclabel(key))
5809 return nfs4_set_security_label(dentry, buf, buflen);
5810
5811 return -EOPNOTSUPP;
5812}
5813
5814static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5815 void *buf, size_t buflen, int type)
5816{
5817 if (security_ismaclabel(key))
5818 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5819 return -EOPNOTSUPP;
5820}
5821
5822static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5823 size_t list_len, const char *name,
5824 size_t name_len, int type)
5825{
5826 size_t len = 0;
5827
5828 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5829 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5830 if (list && len <= list_len)
5831 security_inode_listsecurity(dentry->d_inode, list, len);
5832 }
5833 return len;
5834}
5835
5836static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5837 .prefix = XATTR_SECURITY_PREFIX,
5838 .list = nfs4_xattr_list_nfs4_label,
5839 .get = nfs4_xattr_get_nfs4_label,
5840 .set = nfs4_xattr_set_nfs4_label,
5841};
5842#endif
5843
5844
533eb461
AA		 5845/*
5846 * nfs_fhget will use either the mounted_on_fileid or the fileid
5847 */
69aaaae1
TM		 5848static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5849{
533eb461
AA		 5850 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5851 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5852 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5853 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5854 return;
5855
5856 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5857 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5858 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5859 fattr->nlink = 2;
5860}
5861
f05d147f
BS		 5862static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5863 const struct qstr *name,
5864 struct nfs4_fs_locations *fs_locations,
5865 struct page *page)
683b57b4
TM		 5866{
5867 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5868 u32 bitmask[3] = {
361e624f 5869 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5870 };
5871 struct nfs4_fs_locations_arg args = {
5872 .dir_fh = NFS_FH(dir),
c228fd3a 5873 .name = name,
683b57b4
TM		 5874 .page = page,
5875 .bitmask = bitmask,
5876 };
22958463
BH		 5877 struct nfs4_fs_locations_res res = {
5878 .fs_locations = fs_locations,
5879 };
683b57b4
TM		 5880 struct rpc_message msg = {
5881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5882 .rpc_argp = &args,
22958463 5883 .rpc_resp = &res,
683b57b4
TM		 5884 };
5885 int status;
5886
3110ff80 5887 dprintk("%s: start\n", __func__);
533eb461
AA		 5888
5889 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5890 * is not supported */
5891 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5892 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5893 else
5894 bitmask[0] |= FATTR4_WORD0_FILEID;
5895
c228fd3a 5896 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5897 fs_locations->server = server;
830b8e33 5898 fs_locations->nlocations = 0;
f05d147f 5899 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5900 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5901 return status;
5902}
5903
f05d147f
BS		 5904int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5905 const struct qstr *name,
5906 struct nfs4_fs_locations *fs_locations,
5907 struct page *page)
db0a9593
BS		 5908{
5909 struct nfs4_exception exception = { };
5910 int err;
5911 do {
078ea3df
TM		 5912 err = _nfs4_proc_fs_locations(client, dir, name,
5913 fs_locations, page);
5914 trace_nfs4_get_fs_locations(dir, name, err);
5915 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5916 &exception);
5917 } while (exception.retry);
5918 return err;
5919}
5920
5ec16a85 5921/**
a5250def
WAA		 5922 * If 'use_integrity' is true and the state managment nfs_client
5923 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5924 * and the machine credential as per RFC3530bis and RFC5661 Security
5925 * Considerations sections. Otherwise, just use the user cred with the
5926 * filesystem's rpc_client.
5ec16a85 5927 */
a5250def 5928static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5929{
5930 int status;
5931 struct nfs4_secinfo_arg args = {
5932 .dir_fh = NFS_FH(dir),
5933 .name = name,
5934 };
5935 struct nfs4_secinfo_res res = {
5936 .flavors = flavors,
5937 };
5938 struct rpc_message msg = {
5939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5940 .rpc_argp = &args,
5941 .rpc_resp = &res,
5942 };
a5250def
WAA		 5943 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
5944
5945 if (use_integrity) {
5946 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5947 msg.rpc_cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
5948 }
5a5ea0d4
BS		 5949
5950 dprintk("NFS call secinfo %s\n", name->name);
a5250def
WAA		 5951 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
5952 &res.seq_res, 0);
5a5ea0d4 5953 dprintk("NFS reply secinfo: %d\n", status);
a5250def
WAA		 5954
5955 if (msg.rpc_cred)
5956 put_rpccred(msg.rpc_cred);
5957
5a5ea0d4
BS		 5958 return status;
5959}
5960
72de53ec
BS		 5961int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5962 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5963{
5964 struct nfs4_exception exception = { };
5965 int err;
5966 do {
a5250def
WAA		 5967 err = -NFS4ERR_WRONGSEC;
5968
5969 /* try to use integrity protection with machine cred */
5970 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
5971 err = _nfs4_proc_secinfo(dir, name, flavors, true);
5972
5973 /*
5974 * if unable to use integrity protection, or SECINFO with
5975 * integrity protection returns NFS4ERR_WRONGSEC (which is
5976 * disallowed by spec, but exists in deployed servers) use
5977 * the current filesystem's rpc_client and the user cred.
5978 */
5979 if (err == -NFS4ERR_WRONGSEC)
5980 err = _nfs4_proc_secinfo(dir, name, flavors, false);
5981
078ea3df
TM		 5982 trace_nfs4_secinfo(dir, name, err);
5983 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5984 &exception);
5985 } while (exception.retry);
5986 return err;
5987}
5988
557134a3 5989#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5990/*
5991 * Check the exchange flags returned by the server for invalid flags, having
5992 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5993 * DS flags set.
5994 */
5995static int nfs4_check_cl_exchange_flags(u32 flags)
5996{
5997 if (flags & ~EXCHGID4_FLAG_MASK_R)
5998 goto out_inval;
5999 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6000 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6001 goto out_inval;
6002 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6003 goto out_inval;
6004 return NFS_OK;
6005out_inval:
6006 return -NFS4ERR_INVAL;
6007}
6008
78fe0f41 6009static bool
79d4e1f0
CL		 6010nfs41_same_server_scope(struct nfs41_server_scope *a,
6011 struct nfs41_server_scope *b)
78fe0f41
WAA		 6012{
6013 if (a->server_scope_sz == b->server_scope_sz &&
6014 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6015 return true;
6016
6017 return false;
6018}
6019
7c44f1ae
WAA		 6020/*
6021 * nfs4_proc_bind_conn_to_session()
6022 *
6023 * The 4.1 client currently uses the same TCP connection for the
6024 * fore and backchannel.
6025 */
2cf047c9 6026int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6027{
6028 int status;
6029 struct nfs41_bind_conn_to_session_res res;
6030 struct rpc_message msg = {
6031 .rpc_proc =
6032 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6033 .rpc_argp = clp,
6034 .rpc_resp = &res,
2cf047c9 6035 .rpc_cred = cred,
7c44f1ae
WAA		 6036 };
6037
6038 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6039
6040 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6041 if (unlikely(res.session == NULL)) {
6042 status = -ENOMEM;
6043 goto out;
6044 }
6045
6046 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6047 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6048 if (status == 0) {
6049 if (memcmp(res.session->sess_id.data,
6050 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6051 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6052 status = -EIO;
6053 goto out_session;
6054 }
6055 if (res.dir != NFS4_CDFS4_BOTH) {
6056 dprintk("NFS: %s: Unexpected direction from server\n",
6057 __func__);
6058 status = -EIO;
6059 goto out_session;
6060 }
6061 if (res.use_conn_in_rdma_mode) {
6062 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6063 __func__);
6064 status = -EIO;
6065 goto out_session;
6066 }
6067 }
6068out_session:
6069 kfree(res.session);
6070out:
6071 dprintk("<-- %s status= %d\n", __func__, status);
6072 return status;
6073}
6074
99fe60d0
BH		 6075/*
6076 * nfs4_proc_exchange_id()
6077 *
6bbb4ae8
CL		 6078 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6079 *
99fe60d0
BH		 6080 * Since the clientid has expired, all compounds using sessions
6081 * associated with the stale clientid will be returning
6082 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6083 * be in some phase of session reset.
6084 */
4d643d1d 6085int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 6086{
6087 nfs4_verifier verifier;
6088 struct nfs41_exchange_id_args args = {
cd93710e 6089 .verifier = &verifier,
99fe60d0 6090 .client = clp,
4f0b429d
TM		 6091 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6092 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6093 };
6094 struct nfs41_exchange_id_res res = {
32b01310 6095 0
99fe60d0
BH		 6096 };
6097 int status;
6098 struct rpc_message msg = {
6099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6100 .rpc_argp = &args,
6101 .rpc_resp = &res,
6102 .rpc_cred = cred,
6103 };
99fe60d0 6104
f092075d 6105 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6106 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6107 sizeof(args.id));
6bbb4ae8
CL		 6108 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6109 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6110 args.id_len, args.id);
99fe60d0 6111
acdeb69d 6112 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6113 GFP_NOFS);
acdeb69d 6114 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6115 status = -ENOMEM;
6116 goto out;
6117 }
78fe0f41 6118
79d4e1f0 6119 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6120 GFP_NOFS);
177313f1 6121 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6122 status = -ENOMEM;
acdeb69d 6123 goto out_server_owner;
abe9a6d5 6124 }
78fe0f41 6125
bbafffd2 6126 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6127 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6128 status = -ENOMEM;
6129 goto out_server_scope;
6130 }
6131
1bd714f2 6132 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6133 trace_nfs4_exchange_id(clp, status);
177313f1 6134 if (status == 0)
32b01310 6135 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6136
acdeb69d 6137 if (status == 0) {
32b01310
TM		 6138 clp->cl_clientid = res.clientid;
6139 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6140 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6141 clp->cl_seqid = res.seqid;
6142
acdeb69d
CL		 6143 kfree(clp->cl_serverowner);
6144 clp->cl_serverowner = res.server_owner;
6145 res.server_owner = NULL;
78fe0f41 6146
7d2ed9ac 6147 /* use the most recent implementation id */
59155546
CL		 6148 kfree(clp->cl_implid);
6149 clp->cl_implid = res.impl_id;
7d2ed9ac 6150
177313f1 6151 if (clp->cl_serverscope != NULL &&
79d4e1f0 6152 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6153 res.server_scope)) {
6154 dprintk("%s: server_scope mismatch detected\n",
6155 __func__);
6156 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6157 kfree(clp->cl_serverscope);
6158 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6159 }
6160
177313f1 6161 if (clp->cl_serverscope == NULL) {
79d4e1f0 6162 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6163 goto out;
6164 }
32b01310
TM		 6165 } else
6166 kfree(res.impl_id);
7d2ed9ac 6167
acdeb69d
CL		 6168out_server_owner:
6169 kfree(res.server_owner);
7d2ed9ac 6170out_server_scope:
abe9a6d5
WAA		 6171 kfree(res.server_scope);
6172out:
177313f1 6173 if (clp->cl_implid != NULL)
6bbb4ae8 6174 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6175 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6176 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6177 clp->cl_implid->date.seconds,
6178 clp->cl_implid->date.nseconds);
6bbb4ae8 6179 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6180 return status;
6181}
6182
66245539
TM		 6183static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6184 struct rpc_cred *cred)
6185{
6186 struct rpc_message msg = {
6187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6188 .rpc_argp = clp,
6189 .rpc_cred = cred,
6190 };
6191 int status;
6192
6193 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6194 trace_nfs4_destroy_clientid(clp, status);
66245539 6195 if (status)
02c67525 6196 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6197 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6198 return status;
6199}
6200
6201static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6202 struct rpc_cred *cred)
6203{
6204 unsigned int loop;
6205 int ret;
6206
6207 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6208 ret = _nfs4_proc_destroy_clientid(clp, cred);
6209 switch (ret) {
6210 case -NFS4ERR_DELAY:
6211 case -NFS4ERR_CLIENTID_BUSY:
6212 ssleep(1);
6213 break;
6214 default:
6215 return ret;
6216 }
6217 }
6218 return 0;
6219}
6220
6221int nfs4_destroy_clientid(struct nfs_client *clp)
6222{
6223 struct rpc_cred *cred;
6224 int ret = 0;
6225
6226 if (clp->cl_mvops->minor_version < 1)
6227 goto out;
6228 if (clp->cl_exchange_flags == 0)
6229 goto out;
05f4c350
CL		 6230 if (clp->cl_preserve_clid)
6231 goto out;
73d8bde5 6232 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6233 ret = nfs4_proc_destroy_clientid(clp, cred);
6234 if (cred)
6235 put_rpccred(cred);
6236 switch (ret) {
6237 case 0:
6238 case -NFS4ERR_STALE_CLIENTID:
6239 clp->cl_exchange_flags = 0;
6240 }
6241out:
6242 return ret;
6243}
6244
2050f0cc
AA		 6245struct nfs4_get_lease_time_data {
6246 struct nfs4_get_lease_time_args *args;
6247 struct nfs4_get_lease_time_res *res;
6248 struct nfs_client *clp;
6249};
6250
6251static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6252 void *calldata)
6253{
2050f0cc
AA		 6254 struct nfs4_get_lease_time_data *data =
6255 (struct nfs4_get_lease_time_data *)calldata;
6256
6257 dprintk("--> %s\n", __func__);
6258 /* just setup sequence, do not trigger session recovery
6259 since we're invoked within one */
d9afbd1b
TM		 6260 nfs41_setup_sequence(data->clp->cl_session,
6261 &data->args->la_seq_args,
6262 &data->res->lr_seq_res,
6263 task);
2050f0cc
AA		 6264 dprintk("<-- %s\n", __func__);
6265}
6266
6267/*
6268 * Called from nfs4_state_manager thread for session setup, so don't recover
6269 * from sequence operation or clientid errors.
6270 */
6271static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6272{
6273 struct nfs4_get_lease_time_data *data =
6274 (struct nfs4_get_lease_time_data *)calldata;
6275
6276 dprintk("--> %s\n", __func__);
14516c3a
TM		 6277 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6278 return;
2050f0cc
AA		 6279 switch (task->tk_status) {
6280 case -NFS4ERR_DELAY:
6281 case -NFS4ERR_GRACE:
6282 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6283 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6284 task->tk_status = 0;
a8a4ae3a
AA		 6285 /* fall through */
6286 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6287 rpc_restart_call_prepare(task);
2050f0cc
AA		 6288 return;
6289 }
2050f0cc
AA		 6290 dprintk("<-- %s\n", __func__);
6291}
6292
17280175 6293static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6294 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6295 .rpc_call_done = nfs4_get_lease_time_done,
6296};
6297
6298int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6299{
6300 struct rpc_task *task;
6301 struct nfs4_get_lease_time_args args;
6302 struct nfs4_get_lease_time_res res = {
6303 .lr_fsinfo = fsinfo,
6304 };
6305 struct nfs4_get_lease_time_data data = {
6306 .args = &args,
6307 .res = &res,
6308 .clp = clp,
6309 };
6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6312 .rpc_argp = &args,
6313 .rpc_resp = &res,
6314 };
6315 struct rpc_task_setup task_setup = {
6316 .rpc_client = clp->cl_rpcclient,
6317 .rpc_message = &msg,
6318 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6319 .callback_data = &data,
6320 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6321 };
6322 int status;
6323
a9c92d6b 6324 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6325 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6326 dprintk("--> %s\n", __func__);
6327 task = rpc_run_task(&task_setup);
6328
6329 if (IS_ERR(task))
6330 status = PTR_ERR(task);
6331 else {
6332 status = task->tk_status;
6333 rpc_put_task(task);
6334 }
6335 dprintk("<-- %s return %d\n", __func__, status);
6336
6337 return status;
6338}
6339
fc931582
AA		 6340/*
6341 * Initialize the values to be used by the client in CREATE_SESSION
6342 * If nfs4_init_session set the fore channel request and response sizes,
6343 * use them.
6344 *
6345 * Set the back channel max_resp_sz_cached to zero to force the client to
6346 * always set csa_cachethis to FALSE because the current implementation
6347 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6348 */
6349static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6350{
18aad3d5
AA		 6351 unsigned int max_rqst_sz, max_resp_sz;
6352
6353 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6354 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6355
fc931582 6356 /* Fore channel attributes */
18aad3d5
AA		 6357 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6358 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6359 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6360 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6361
6362 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6363 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6364 __func__,
6365 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6366 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6367
6368 /* Back channel attributes */
fc931582
AA		 6369 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6370 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6371 args->bc_attrs.max_resp_sz_cached = 0;
6372 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6373 args->bc_attrs.max_reqs = 1;
6374
6375 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6376 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6377 __func__,
6378 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6379 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6380 args->bc_attrs.max_reqs);
6381}
6382
43c2e885 6383static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6384{
43c2e885
BF		 6385 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6386 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6387
43c2e885
BF		 6388 if (rcvd->max_resp_sz > sent->max_resp_sz)
6389 return -EINVAL;
6390 /*
6391 * Our requested max_ops is the minimum we need; we're not
6392 * prepared to break up compounds into smaller pieces than that.
6393 * So, no point even trying to continue if the server won't
6394 * cooperate:
6395 */
6396 if (rcvd->max_ops < sent->max_ops)
6397 return -EINVAL;
6398 if (rcvd->max_reqs == 0)
6399 return -EINVAL;
b4b9a0c1
VG		 6400 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6401 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6402 return 0;
8d35301d
AA		 6403}
6404
43c2e885
BF		 6405static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6406{
6407 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6408 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6409
43c2e885
BF		 6410 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6411 return -EINVAL;
6412 if (rcvd->max_resp_sz < sent->max_resp_sz)
6413 return -EINVAL;
6414 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6415 return -EINVAL;
6416 /* These would render the backchannel useless: */
b4b9a0c1 6417 if (rcvd->max_ops != sent->max_ops)
43c2e885 6418 return -EINVAL;
b4b9a0c1 6419 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6420 return -EINVAL;
6421 return 0;
6422}
8d35301d 6423
8d35301d
AA		 6424static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6425 struct nfs4_session *session)
6426{
43c2e885 6427 int ret;
8d35301d 6428
43c2e885
BF		 6429 ret = nfs4_verify_fore_channel_attrs(args, session);
6430 if (ret)
6431 return ret;
6432 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6433}
6434
848f5bda
TM		 6435static int _nfs4_proc_create_session(struct nfs_client *clp,
6436 struct rpc_cred *cred)
fc931582
AA		 6437{
6438 struct nfs4_session *session = clp->cl_session;
6439 struct nfs41_create_session_args args = {
6440 .client = clp,
6441 .cb_program = NFS4_CALLBACK,
6442 };
6443 struct nfs41_create_session_res res = {
6444 .client = clp,
6445 };
6446 struct rpc_message msg = {
6447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6448 .rpc_argp = &args,
6449 .rpc_resp = &res,
848f5bda 6450 .rpc_cred = cred,
fc931582
AA		 6451 };
6452 int status;
6453
6454 nfs4_init_channel_attrs(&args);
0f91421e 6455 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6456
1bd714f2 6457 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6458 trace_nfs4_create_session(clp, status);
fc931582 6459
43095d39 6460 if (!status) {
8d35301d
AA		 6461 /* Verify the session's negotiated channel_attrs values */
6462 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6463 /* Increment the clientid slot sequence id */
6464 clp->cl_seqid++;
6465 }
6466
6467 return status;
6468}
6469
6470/*
6471 * Issues a CREATE_SESSION operation to the server.
6472 * It is the responsibility of the caller to verify the session is
6473 * expired before calling this routine.
6474 */
848f5bda 6475int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6476{
6477 int status;
6478 unsigned *ptr;
fc931582
AA		 6479 struct nfs4_session *session = clp->cl_session;
6480
6481 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6482
848f5bda 6483 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6484 if (status)
6485 goto out;
6486
aacd5537
AA		 6487 /* Init or reset the session slot tables */
6488 status = nfs4_setup_session_slot_tables(session);
6489 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6490 if (status)
6491 goto out;
6492
6493 ptr = (unsigned *)&session->sess_id.data[0];
6494 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6495 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6496out:
6497 dprintk("<-- %s\n", __func__);
6498 return status;
6499}
6500
0f3e66c6
AA		 6501/*
6502 * Issue the over-the-wire RPC DESTROY_SESSION.
6503 * The caller must serialize access to this routine.
6504 */
848f5bda
TM		 6505int nfs4_proc_destroy_session(struct nfs4_session *session,
6506 struct rpc_cred *cred)
0f3e66c6 6507{
848f5bda
TM		 6508 struct rpc_message msg = {
6509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6510 .rpc_argp = session,
6511 .rpc_cred = cred,
6512 };
0f3e66c6 6513 int status = 0;
0f3e66c6
AA		 6514
6515 dprintk("--> nfs4_proc_destroy_session\n");
6516
6517 /* session is still being setup */
6518 if (session->clp->cl_cons_state != NFS_CS_READY)
6519 return status;
6520
1bd714f2 6521 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6522 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6523
6524 if (status)
08106ac7 6525 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6526 "Session has been destroyed regardless...\n", status);
6527
6528 dprintk("<-- nfs4_proc_destroy_session\n");
6529 return status;
6530}
6531
fc01cea9
AA		 6532/*
6533 * Renew the cl_session lease.
6534 */
d5f8d3fe
TM		 6535struct nfs4_sequence_data {
6536 struct nfs_client *clp;
6537 struct nfs4_sequence_args args;
6538 struct nfs4_sequence_res res;
6539};
6540
dc96aef9
AB		 6541static void nfs41_sequence_release(void *data)
6542{
d5f8d3fe
TM		 6543 struct nfs4_sequence_data *calldata = data;
6544 struct nfs_client *clp = calldata->clp;
dc96aef9 6545
7135840f
AB		 6546 if (atomic_read(&clp->cl_count) > 1)
6547 nfs4_schedule_state_renewal(clp);
6548 nfs_put_client(clp);
d5f8d3fe 6549 kfree(calldata);
dc96aef9
AB		 6550}
6551
aa5190d0
TM		 6552static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6553{
6554 switch(task->tk_status) {
6555 case -NFS4ERR_DELAY:
aa5190d0
TM		 6556 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6557 return -EAGAIN;
6558 default:
0400a6b0 6559 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6560 }
6561 return 0;
6562}
6563
dc96aef9 6564static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6565{
d5f8d3fe
TM		 6566 struct nfs4_sequence_data *calldata = data;
6567 struct nfs_client *clp = calldata->clp;
fc01cea9 6568
14516c3a
TM		 6569 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6570 return;
fc01cea9 6571
c6d01c6f 6572 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6573 if (task->tk_status < 0) {
6574 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6575 if (atomic_read(&clp->cl_count) == 1)
6576 goto out;
fc01cea9 6577
aa5190d0
TM		 6578 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6579 rpc_restart_call_prepare(task);
fc01cea9
AA		 6580 return;
6581 }
6582 }
fc01cea9 6583 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6584out:
fc01cea9
AA		 6585 dprintk("<-- %s\n", __func__);
6586}
6587
6588static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6589{
d5f8d3fe
TM		 6590 struct nfs4_sequence_data *calldata = data;
6591 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6592 struct nfs4_sequence_args *args;
6593 struct nfs4_sequence_res *res;
6594
fc01cea9
AA		 6595 args = task->tk_msg.rpc_argp;
6596 res = task->tk_msg.rpc_resp;
6597
d9afbd1b 6598 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6599}
6600
6601static const struct rpc_call_ops nfs41_sequence_ops = {
6602 .rpc_call_done = nfs41_sequence_call_done,
6603 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6604 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6605};
6606
8fe72bac
TM		 6607static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6608 struct rpc_cred *cred,
6609 bool is_privileged)
fc01cea9 6610{
d5f8d3fe 6611 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6612 struct rpc_message msg = {
6613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6614 .rpc_cred = cred,
6615 };
71ac6da9
TM		 6616 struct rpc_task_setup task_setup_data = {
6617 .rpc_client = clp->cl_rpcclient,
6618 .rpc_message = &msg,
8fe72bac 6619 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6620 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6621 };
fc01cea9 6622
7135840f 6623 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6624 return ERR_PTR(-EIO);
dfb4f309 6625 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6626 if (calldata == NULL) {
7135840f 6627 nfs_put_client(clp);
71ac6da9 6628 return ERR_PTR(-ENOMEM);
fc01cea9 6629 }
a9c92d6b 6630 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6631 if (is_privileged)
6632 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6633 msg.rpc_argp = &calldata->args;
6634 msg.rpc_resp = &calldata->res;
6635 calldata->clp = clp;
71ac6da9 6636 task_setup_data.callback_data = calldata;
fc01cea9 6637
71ac6da9
TM		 6638 return rpc_run_task(&task_setup_data);
6639}
6640
2f60ea6b 6641static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6642{
6643 struct rpc_task *task;
6644 int ret = 0;
6645
2f60ea6b
TM		 6646 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6647 return 0;
8fe72bac 6648 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6649 if (IS_ERR(task))
6650 ret = PTR_ERR(task);
6651 else
bf294b41 6652 rpc_put_task_async(task);
71ac6da9
TM		 6653 dprintk("<-- %s status=%d\n", __func__, ret);
6654 return ret;
6655}
6656
6657static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6658{
6659 struct rpc_task *task;
6660 int ret;
6661
8fe72bac 6662 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6663 if (IS_ERR(task)) {
6664 ret = PTR_ERR(task);
6665 goto out;
6666 }
6667 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6668 if (!ret) {
6669 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6670
6671 if (task->tk_status == 0)
6672 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6673 ret = task->tk_status;
b4410c2f 6674 }
71ac6da9
TM		 6675 rpc_put_task(task);
6676out:
6677 dprintk("<-- %s status=%d\n", __func__, ret);
6678 return ret;
fc01cea9
AA		 6679}
6680
fce5c838
RL		 6681struct nfs4_reclaim_complete_data {
6682 struct nfs_client *clp;
6683 struct nfs41_reclaim_complete_args arg;
6684 struct nfs41_reclaim_complete_res res;
6685};
6686
6687static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6688{
6689 struct nfs4_reclaim_complete_data *calldata = data;
6690
d9afbd1b
TM		 6691 nfs41_setup_sequence(calldata->clp->cl_session,
6692 &calldata->arg.seq_args,
6693 &calldata->res.seq_res,
6694 task);
fce5c838
RL		 6695}
6696
aa5190d0
TM		 6697static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6698{
6699 switch(task->tk_status) {
6700 case 0:
6701 case -NFS4ERR_COMPLETE_ALREADY:
6702 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6703 break;
6704 case -NFS4ERR_DELAY:
aa5190d0 6705 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6706 /* fall through */
6707 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6708 return -EAGAIN;
6709 default:
0400a6b0 6710 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6711 }
6712 return 0;
6713}
6714
fce5c838
RL		 6715static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6716{
6717 struct nfs4_reclaim_complete_data *calldata = data;
6718 struct nfs_client *clp = calldata->clp;
6719 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6720
6721 dprintk("--> %s\n", __func__);
14516c3a
TM		 6722 if (!nfs41_sequence_done(task, res))
6723 return;
fce5c838 6724
c6d01c6f 6725 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6726 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6727 rpc_restart_call_prepare(task);
6728 return;
6729 }
fce5c838
RL		 6730 dprintk("<-- %s\n", __func__);
6731}
6732
6733static void nfs4_free_reclaim_complete_data(void *data)
6734{
6735 struct nfs4_reclaim_complete_data *calldata = data;
6736
6737 kfree(calldata);
6738}
6739
6740static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6741 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6742 .rpc_call_done = nfs4_reclaim_complete_done,
6743 .rpc_release = nfs4_free_reclaim_complete_data,
6744};
6745
6746/*
6747 * Issue a global reclaim complete.
6748 */
965e9c23
TM		 6749static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6750 struct rpc_cred *cred)
fce5c838
RL		 6751{
6752 struct nfs4_reclaim_complete_data *calldata;
6753 struct rpc_task *task;
6754 struct rpc_message msg = {
6755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6756 .rpc_cred = cred,
fce5c838
RL		 6757 };
6758 struct rpc_task_setup task_setup_data = {
6759 .rpc_client = clp->cl_rpcclient,
6760 .rpc_message = &msg,
6761 .callback_ops = &nfs4_reclaim_complete_call_ops,
6762 .flags = RPC_TASK_ASYNC,
6763 };
6764 int status = -ENOMEM;
6765
6766 dprintk("--> %s\n", __func__);
8535b2be 6767 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6768 if (calldata == NULL)
6769 goto out;
6770 calldata->clp = clp;
6771 calldata->arg.one_fs = 0;
fce5c838 6772
a9c92d6b 6773 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6774 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6775 msg.rpc_argp = &calldata->arg;
6776 msg.rpc_resp = &calldata->res;
6777 task_setup_data.callback_data = calldata;
6778 task = rpc_run_task(&task_setup_data);
acf82b85 6779 if (IS_ERR(task)) {
fce5c838 6780 status = PTR_ERR(task);
acf82b85
DC		 6781 goto out;
6782 }
c34c32ea
AA		 6783 status = nfs4_wait_for_completion_rpc_task(task);
6784 if (status == 0)
6785 status = task->tk_status;
fce5c838 6786 rpc_put_task(task);
acf82b85 6787 return 0;
fce5c838
RL		 6788out:
6789 dprintk("<-- %s status=%d\n", __func__, status);
6790 return status;
6791}
b1f69b75
AA		 6792
6793static void
6794nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6795{
6796 struct nfs4_layoutget *lgp = calldata;
c31663d4 6797 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6798 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6799
6800 dprintk("--> %s\n", __func__);
c31663d4
FI		 6801 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6802 * right now covering the LAYOUTGET we are about to send.
6803 * However, that is not so catastrophic, and there seems
6804 * to be no way to prevent it completely.
6805 */
6ba7db34 6806 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6807 &lgp->res.seq_res, task))
b1f69b75 6808 return;
cf7d63f1
FI		 6809 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6810 NFS_I(lgp->args.inode)->layout,
6811 lgp->args.ctx->state)) {
6812 rpc_exit(task, NFS4_OK);
cf7d63f1 6813 }
b1f69b75
AA		 6814}
6815
6816static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6817{
6818 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6819 struct inode *inode = lgp->args.inode;
6820 struct nfs_server *server = NFS_SERVER(inode);
6821 struct pnfs_layout_hdr *lo;
6822 struct nfs4_state *state = NULL;
30005121 6823 unsigned long timeo, giveup;
b1f69b75
AA		 6824
6825 dprintk("--> %s\n", __func__);
6826
6ba7db34 6827 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6828 goto out;
b1f69b75
AA		 6829
6830 switch (task->tk_status) {
6831 case 0:
ee314c2a 6832 goto out;
b1f69b75
AA		 6833 case -NFS4ERR_LAYOUTTRYLATER:
6834 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6835 timeo = rpc_get_timeout(task->tk_client);
6836 giveup = lgp->args.timestamp + timeo;
6837 if (time_after(giveup, jiffies))
6838 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6839 break;
6840 case -NFS4ERR_EXPIRED:
6841 case -NFS4ERR_BAD_STATEID:
6842 spin_lock(&inode->i_lock);
6843 lo = NFS_I(inode)->layout;
6844 if (!lo || list_empty(&lo->plh_segs)) {
6845 spin_unlock(&inode->i_lock);
6846 /* If the open stateid was bad, then recover it. */
6847 state = lgp->args.ctx->state;
6848 } else {
6849 LIST_HEAD(head);
6850
6851 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6852 spin_unlock(&inode->i_lock);
6853 /* Mark the bad layout state as invalid, then
6854 * retry using the open stateid. */
6855 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6856 }
6857 }
ee314c2a
TM		 6858 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6859 rpc_restart_call_prepare(task);
6860out:
b1f69b75
AA		 6861 dprintk("<-- %s\n", __func__);
6862}
6863
8554116e
IK		 6864static size_t max_response_pages(struct nfs_server *server)
6865{
6866 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6867 return nfs_page_array_len(0, max_resp_sz);
6868}
6869
6870static void nfs4_free_pages(struct page **pages, size_t size)
6871{
6872 int i;
6873
6874 if (!pages)
6875 return;
6876
6877 for (i = 0; i < size; i++) {
6878 if (!pages[i])
6879 break;
6880 __free_page(pages[i]);
6881 }
6882 kfree(pages);
6883}
6884
6885static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6886{
6887 struct page **pages;
6888 int i;
6889
6890 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6891 if (!pages) {
6892 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6893 return NULL;
6894 }
6895
6896 for (i = 0; i < size; i++) {
6897 pages[i] = alloc_page(gfp_flags);
6898 if (!pages[i]) {
6899 dprintk("%s: failed to allocate page\n", __func__);
6900 nfs4_free_pages(pages, size);
6901 return NULL;
6902 }
6903 }
6904
6905 return pages;
6906}
6907
b1f69b75
AA		 6908static void nfs4_layoutget_release(void *calldata)
6909{
6910 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6911 struct inode *inode = lgp->args.inode;
6912 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6913 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6914
6915 dprintk("--> %s\n", __func__);
8554116e 6916 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6917 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6918 put_nfs_open_context(lgp->args.ctx);
6919 kfree(calldata);
6920 dprintk("<-- %s\n", __func__);
6921}
6922
6923static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6924 .rpc_call_prepare = nfs4_layoutget_prepare,
6925 .rpc_call_done = nfs4_layoutget_done,
6926 .rpc_release = nfs4_layoutget_release,
6927};
6928
a0b0a6e3
TM		 6929struct pnfs_layout_segment *
6930nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6931{
a47970ff
WAA		 6932 struct inode *inode = lgp->args.inode;
6933 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6934 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6935 struct rpc_task *task;
6936 struct rpc_message msg = {
6937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6938 .rpc_argp = &lgp->args,
6939 .rpc_resp = &lgp->res,
6ab59344 6940 .rpc_cred = lgp->cred,
b1f69b75
AA		 6941 };
6942 struct rpc_task_setup task_setup_data = {
6943 .rpc_client = server->client,
6944 .rpc_message = &msg,
6945 .callback_ops = &nfs4_layoutget_call_ops,
6946 .callback_data = lgp,
6947 .flags = RPC_TASK_ASYNC,
6948 };
a0b0a6e3 6949 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6950 int status = 0;
6951
6952 dprintk("--> %s\n", __func__);
6953
8554116e
IK		 6954 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6955 if (!lgp->args.layout.pages) {
6956 nfs4_layoutget_release(lgp);
a0b0a6e3 6957 return ERR_PTR(-ENOMEM);
8554116e
IK		 6958 }
6959 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6960 lgp->args.timestamp = jiffies;
8554116e 6961
35124a09 6962 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6963 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 6964 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6965
6966 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6967 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6968
b1f69b75
AA		 6969 task = rpc_run_task(&task_setup_data);
6970 if (IS_ERR(task))
a0b0a6e3 6971 return ERR_CAST(task);
b1f69b75 6972 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6973 if (status == 0)
6974 status = task->tk_status;
1037e6ea
TM		 6975 trace_nfs4_layoutget(lgp->args.ctx,
6976 &lgp->args.range,
6977 &lgp->res.range,
6978 status);
085b7a45
WAA		 6979 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6980 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6981 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6982 rpc_put_task(task);
6983 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6984 if (status)
6985 return ERR_PTR(status);
6986 return lseg;
b1f69b75
AA		 6987}
6988
cbe82603
BH		 6989static void
6990nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6991{
6992 struct nfs4_layoutreturn *lrp = calldata;
6993
6994 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6995 nfs41_setup_sequence(lrp->clp->cl_session,
6996 &lrp->args.seq_args,
6997 &lrp->res.seq_res,
6998 task);
cbe82603
BH		 6999}
7000
7001static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7002{
7003 struct nfs4_layoutreturn *lrp = calldata;
7004 struct nfs_server *server;
7005
7006 dprintk("--> %s\n", __func__);
7007
6ba7db34 7008 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7009 return;
7010
7011 server = NFS_SERVER(lrp->args.inode);
7012 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7013 rpc_restart_call_prepare(task);
cbe82603
BH		 7014 return;
7015 }
cbe82603
BH		 7016 dprintk("<-- %s\n", __func__);
7017}
7018
7019static void nfs4_layoutreturn_release(void *calldata)
7020{
7021 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7022 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7023
7024 dprintk("--> %s\n", __func__);
849b286f
TM		 7025 spin_lock(&lo->plh_inode->i_lock);
7026 if (lrp->res.lrs_present)
7027 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7028 lo->plh_block_lgets--;
7029 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7030 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7031 kfree(calldata);
7032 dprintk("<-- %s\n", __func__);
7033}
7034
7035static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7036 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7037 .rpc_call_done = nfs4_layoutreturn_done,
7038 .rpc_release = nfs4_layoutreturn_release,
7039};
7040
7041int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7042{
7043 struct rpc_task *task;
7044 struct rpc_message msg = {
7045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7046 .rpc_argp = &lrp->args,
7047 .rpc_resp = &lrp->res,
9556000d 7048 .rpc_cred = lrp->cred,
cbe82603
BH		 7049 };
7050 struct rpc_task_setup task_setup_data = {
1771c577 7051 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7052 .rpc_message = &msg,
7053 .callback_ops = &nfs4_layoutreturn_call_ops,
7054 .callback_data = lrp,
7055 };
7056 int status;
7057
7058 dprintk("--> %s\n", __func__);
a9c92d6b 7059 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7060 task = rpc_run_task(&task_setup_data);
7061 if (IS_ERR(task))
7062 return PTR_ERR(task);
7063 status = task->tk_status;
1037e6ea 7064 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7065 dprintk("<-- %s status=%d\n", __func__, status);
7066 rpc_put_task(task);
7067 return status;
7068}
7069
7f11d8d3
AA		 7070/*
7071 * Retrieve the list of Data Server devices from the MDS.
7072 */
7073static int _nfs4_getdevicelist(struct nfs_server *server,
7074 const struct nfs_fh *fh,
7075 struct pnfs_devicelist *devlist)
7076{
7077 struct nfs4_getdevicelist_args args = {
7078 .fh = fh,
7079 .layoutclass = server->pnfs_curr_ld->id,
7080 };
7081 struct nfs4_getdevicelist_res res = {
7082 .devlist = devlist,
7083 };
7084 struct rpc_message msg = {
7085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7086 .rpc_argp = &args,
7087 .rpc_resp = &res,
7088 };
7089 int status;
7090
7091 dprintk("--> %s\n", __func__);
7092 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7093 &res.seq_res, 0);
7094 dprintk("<-- %s status=%d\n", __func__, status);
7095 return status;
7096}
7097
7098int nfs4_proc_getdevicelist(struct nfs_server *server,
7099 const struct nfs_fh *fh,
7100 struct pnfs_devicelist *devlist)
7101{
7102 struct nfs4_exception exception = { };
7103 int err;
7104
7105 do {
7106 err = nfs4_handle_exception(server,
7107 _nfs4_getdevicelist(server, fh, devlist),
7108 &exception);
7109 } while (exception.retry);
7110
7111 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7112 err, devlist->num_devs);
7113
7114 return err;
7115}
7116EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7117
b1f69b75 7118static int
cd5875fe
TM		 7119_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7120 struct pnfs_device *pdev,
7121 struct rpc_cred *cred)
b1f69b75
AA		 7122{
7123 struct nfs4_getdeviceinfo_args args = {
7124 .pdev = pdev,
7125 };
7126 struct nfs4_getdeviceinfo_res res = {
7127 .pdev = pdev,
7128 };
7129 struct rpc_message msg = {
7130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7131 .rpc_argp = &args,
7132 .rpc_resp = &res,
cd5875fe 7133 .rpc_cred = cred,
b1f69b75
AA		 7134 };
7135 int status;
7136
7137 dprintk("--> %s\n", __func__);
7c513058 7138 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7139 dprintk("<-- %s status=%d\n", __func__, status);
7140
7141 return status;
7142}
7143
cd5875fe
TM		 7144int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7145 struct pnfs_device *pdev,
7146 struct rpc_cred *cred)
b1f69b75
AA		 7147{
7148 struct nfs4_exception exception = { };
7149 int err;
7150
7151 do {
7152 err = nfs4_handle_exception(server,
cd5875fe 7153 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7154 &exception);
7155 } while (exception.retry);
7156 return err;
7157}
7158EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7159
863a3c6c
AA		 7160static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7161{
7162 struct nfs4_layoutcommit_data *data = calldata;
7163 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7164 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7165
d9afbd1b
TM		 7166 nfs41_setup_sequence(session,
7167 &data->args.seq_args,
7168 &data->res.seq_res,
7169 task);
863a3c6c
AA		 7170}
7171
7172static void
7173nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7174{
7175 struct nfs4_layoutcommit_data *data = calldata;
7176 struct nfs_server *server = NFS_SERVER(data->args.inode);
7177
6ba7db34 7178 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7179 return;
7180
7181 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7182 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7183 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7184 case -NFS4ERR_BADLAYOUT: /* no layout */
7185 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7186 task->tk_status = 0;
e59d27e0
TM		 7187 break;
7188 case 0:
863a3c6c
AA		 7189 nfs_post_op_update_inode_force_wcc(data->args.inode,
7190 data->res.fattr);
e59d27e0
TM		 7191 break;
7192 default:
7193 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7194 rpc_restart_call_prepare(task);
7195 return;
7196 }
7197 }
863a3c6c
AA		 7198}
7199
7200static void nfs4_layoutcommit_release(void *calldata)
7201{
7202 struct nfs4_layoutcommit_data *data = calldata;
7203
db29c089 7204 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7205 put_rpccred(data->cred);
7206 kfree(data);
7207}
7208
7209static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7210 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7211 .rpc_call_done = nfs4_layoutcommit_done,
7212 .rpc_release = nfs4_layoutcommit_release,
7213};
7214
7215int
ef311537 7216nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7217{
7218 struct rpc_message msg = {
7219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7220 .rpc_argp = &data->args,
7221 .rpc_resp = &data->res,
7222 .rpc_cred = data->cred,
7223 };
7224 struct rpc_task_setup task_setup_data = {
7225 .task = &data->task,
7226 .rpc_client = NFS_CLIENT(data->args.inode),
7227 .rpc_message = &msg,
7228 .callback_ops = &nfs4_layoutcommit_ops,
7229 .callback_data = data,
7230 .flags = RPC_TASK_ASYNC,
7231 };
7232 struct rpc_task *task;
7233 int status = 0;
7234
7235 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7236 "lbw: %llu inode %lu\n",
7237 data->task.tk_pid, sync,
7238 data->args.lastbytewritten,
7239 data->args.inode->i_ino);
7240
a9c92d6b 7241 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7242 task = rpc_run_task(&task_setup_data);
7243 if (IS_ERR(task))
7244 return PTR_ERR(task);
ef311537 7245 if (sync == false)
863a3c6c
AA		 7246 goto out;
7247 status = nfs4_wait_for_completion_rpc_task(task);
7248 if (status != 0)
7249 goto out;
7250 status = task->tk_status;
1037e6ea 7251 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7252out:
7253 dprintk("%s: status %d\n", __func__, status);
7254 rpc_put_task(task);
7255 return status;
7256}
fca78d6d 7257
97431204
AA		 7258/**
7259 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7260 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7261 */
fca78d6d
BS		 7262static int
7263_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7264 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7265{
7266 struct nfs41_secinfo_no_name_args args = {
7267 .style = SECINFO_STYLE_CURRENT_FH,
7268 };
7269 struct nfs4_secinfo_res res = {
7270 .flavors = flavors,
7271 };
7272 struct rpc_message msg = {
7273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7274 .rpc_argp = &args,
7275 .rpc_resp = &res,
7276 };
97431204
AA		 7277 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7278 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7279}
7280
7281static int
7282nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7283 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7284{
7285 struct nfs4_exception exception = { };
7286 int err;
7287 do {
7288 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7289 switch (err) {
7290 case 0:
7291 case -NFS4ERR_WRONGSEC:
7292 case -NFS4ERR_NOTSUPP:
05e9cfb4 7293 goto out;
fca78d6d
BS		 7294 default:
7295 err = nfs4_handle_exception(server, err, &exception);
7296 }
7297 } while (exception.retry);
05e9cfb4 7298out:
fca78d6d
BS		 7299 return err;
7300}
7301
7302static int
7303nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7304 struct nfs_fsinfo *info)
7305{
7306 int err;
7307 struct page *page;
7308 rpc_authflavor_t flavor;
7309 struct nfs4_secinfo_flavors *flavors;
7310
7311 page = alloc_page(GFP_KERNEL);
7312 if (!page) {
7313 err = -ENOMEM;
7314 goto out;
7315 }
7316
7317 flavors = page_address(page);
7318 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7319
7320 /*
7321 * Fall back on "guess and check" method if
7322 * the server doesn't support SECINFO_NO_NAME
7323 */
7324 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7325 err = nfs4_find_root_sec(server, fhandle, info);
7326 goto out_freepage;
7327 }
7328 if (err)
7329 goto out_freepage;
7330
7331 flavor = nfs_find_best_sec(flavors);
7332 if (err == 0)
7333 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7334
7335out_freepage:
7336 put_page(page);
7337 if (err == -EACCES)
7338 return -EPERM;
7339out:
7340 return err;
7341}
1cab0652 7342
ab7cb0df
TM		 7343static int _nfs41_test_stateid(struct nfs_server *server,
7344 nfs4_stateid *stateid,
7345 struct rpc_cred *cred)
7d974794
BS		 7346{
7347 int status;
7348 struct nfs41_test_stateid_args args = {
1cab0652 7349 .stateid = stateid,
7d974794
BS		 7350 };
7351 struct nfs41_test_stateid_res res;
7352 struct rpc_message msg = {
7353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7354 .rpc_argp = &args,
7355 .rpc_resp = &res,
ab7cb0df 7356 .rpc_cred = cred,
7d974794 7357 };
1cab0652 7358
38527b15 7359 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7360 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7361 nfs4_set_sequence_privileged(&args.seq_args);
7362 status = nfs4_call_sync_sequence(server->client, server, &msg,
7363 &args.seq_args, &res.seq_res);
38527b15
CL		 7364 if (status != NFS_OK) {
7365 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7366 return status;
38527b15
CL		 7367 }
7368 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7369 return -res.status;
7d974794
BS		 7370}
7371
38527b15
CL		 7372/**
7373 * nfs41_test_stateid - perform a TEST_STATEID operation
7374 *
7375 * @server: server / transport on which to perform the operation
7376 * @stateid: state ID to test
ab7cb0df 7377 * @cred: credential
38527b15
CL		 7378 *
7379 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7380 * Otherwise a negative NFS4ERR value is returned if the operation
7381 * failed or the state ID is not currently valid.
7382 */
ab7cb0df
TM		 7383static int nfs41_test_stateid(struct nfs_server *server,
7384 nfs4_stateid *stateid,
7385 struct rpc_cred *cred)
7d974794
BS		 7386{
7387 struct nfs4_exception exception = { };
7388 int err;
7389 do {
ab7cb0df 7390 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7391 if (err != -NFS4ERR_DELAY)
7392 break;
7393 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7394 } while (exception.retry);
7395 return err;
7396}
9aeda35f 7397
7c1d5fae
TM		 7398struct nfs_free_stateid_data {
7399 struct nfs_server *server;
7400 struct nfs41_free_stateid_args args;
9aeda35f 7401 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7402};
7403
7404static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7405{
7406 struct nfs_free_stateid_data *data = calldata;
7407 nfs41_setup_sequence(nfs4_get_session(data->server),
7408 &data->args.seq_args,
7409 &data->res.seq_res,
7410 task);
7411}
7412
7413static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7414{
7415 struct nfs_free_stateid_data *data = calldata;
7416
7417 nfs41_sequence_done(task, &data->res.seq_res);
7418
7419 switch (task->tk_status) {
7420 case -NFS4ERR_DELAY:
7421 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7422 rpc_restart_call_prepare(task);
7423 }
7424}
7425
7426static void nfs41_free_stateid_release(void *calldata)
7427{
7428 kfree(calldata);
7429}
7430
17f26b12 7431static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7432 .rpc_call_prepare = nfs41_free_stateid_prepare,
7433 .rpc_call_done = nfs41_free_stateid_done,
7434 .rpc_release = nfs41_free_stateid_release,
7435};
7436
7437static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7438 nfs4_stateid *stateid,
ab7cb0df 7439 struct rpc_cred *cred,
7c1d5fae
TM		 7440 bool privileged)
7441{
9aeda35f
BS		 7442 struct rpc_message msg = {
7443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7444 .rpc_cred = cred,
9aeda35f 7445 };
7c1d5fae
TM		 7446 struct rpc_task_setup task_setup = {
7447 .rpc_client = server->client,
7448 .rpc_message = &msg,
7449 .callback_ops = &nfs41_free_stateid_ops,
7450 .flags = RPC_TASK_ASYNC,
7451 };
7452 struct nfs_free_stateid_data *data;
9aeda35f 7453
38527b15 7454 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7455 data = kmalloc(sizeof(*data), GFP_NOFS);
7456 if (!data)
7457 return ERR_PTR(-ENOMEM);
7458 data->server = server;
7459 nfs4_stateid_copy(&data->args.stateid, stateid);
7460
7461 task_setup.callback_data = data;
7462
7463 msg.rpc_argp = &data->args;
7464 msg.rpc_resp = &data->res;
a9c92d6b 7465 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7466 if (privileged)
7467 nfs4_set_sequence_privileged(&data->args.seq_args);
7468
7469 return rpc_run_task(&task_setup);
9aeda35f
BS		 7470}
7471
38527b15
CL		 7472/**
7473 * nfs41_free_stateid - perform a FREE_STATEID operation
7474 *
7475 * @server: server / transport on which to perform the operation
7476 * @stateid: state ID to release
ab7cb0df 7477 * @cred: credential
38527b15
CL		 7478 *
7479 * Returns NFS_OK if the server freed "stateid". Otherwise a
7480 * negative NFS4ERR value is returned.
7481 */
ab7cb0df
TM		 7482static int nfs41_free_stateid(struct nfs_server *server,
7483 nfs4_stateid *stateid,
7484 struct rpc_cred *cred)
9aeda35f 7485{
7c1d5fae
TM		 7486 struct rpc_task *task;
7487 int ret;
7488
ab7cb0df 7489 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7490 if (IS_ERR(task))
7491 return PTR_ERR(task);
7492 ret = rpc_wait_for_completion_task(task);
7493 if (!ret)
7494 ret = task->tk_status;
7495 rpc_put_task(task);
7496 return ret;
9aeda35f 7497}
36281caa 7498
c8b2d0bf
TM		 7499static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7500{
7501 struct rpc_task *task;
ab7cb0df 7502 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7503
ab7cb0df 7504 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7505 nfs4_free_lock_state(server, lsp);
7506 if (IS_ERR(task))
7507 return PTR_ERR(task);
7508 rpc_put_task(task);
7509 return 0;
7510}
7511
36281caa
TM		 7512static bool nfs41_match_stateid(const nfs4_stateid *s1,
7513 const nfs4_stateid *s2)
7514{
2d2f24ad 7515 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7516 return false;
7517
2d2f24ad 7518 if (s1->seqid == s2->seqid)
36281caa 7519 return true;
2d2f24ad 7520 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7521 return true;
7522
7523 return false;
7524}
7525
557134a3
AA		 7526#endif /* CONFIG_NFS_V4_1 */
7527
36281caa
TM		 7528static bool nfs4_match_stateid(const nfs4_stateid *s1,
7529 const nfs4_stateid *s2)
7530{
f597c537 7531 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7532}
7533
7534
17280175 7535static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7536 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7537 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7538 .recover_open = nfs4_open_reclaim,
7539 .recover_lock = nfs4_lock_reclaim,
591d71cb 7540 .establish_clid = nfs4_init_clientid,
05f4c350 7541 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7542};
7543
591d71cb 7544#if defined(CONFIG_NFS_V4_1)
17280175 7545static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7546 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7547 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7548 .recover_open = nfs4_open_reclaim,
7549 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7550 .establish_clid = nfs41_init_clientid,
fce5c838 7551 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7552 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7553};
7554#endif /* CONFIG_NFS_V4_1 */
7555
17280175 7556static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7557 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7558 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7559 .recover_open = nfs4_open_expired,
7560 .recover_lock = nfs4_lock_expired,
7561 .establish_clid = nfs4_init_clientid,
7562};
7563
7564#if defined(CONFIG_NFS_V4_1)
17280175 7565static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7566 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7567 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7568 .recover_open = nfs41_open_expired,
7569 .recover_lock = nfs41_lock_expired,
4d643d1d 7570 .establish_clid = nfs41_init_clientid,
1da177e4 7571};
591d71cb 7572#endif /* CONFIG_NFS_V4_1 */
1da177e4 7573
17280175 7574static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7575 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7576 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7577 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7578};
7579
7580#if defined(CONFIG_NFS_V4_1)
17280175 7581static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7582 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7583 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7584 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7585};
7586#endif
7587
97dc1359
TM		 7588static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7589 .minor_version = 0,
39c6daae
TM		 7590 .init_caps = NFS_CAP_READDIRPLUS
7591 | NFS_CAP_ATOMIC_OPEN
7592 | NFS_CAP_CHANGE_ATTR
7593 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 7594 .init_client = nfs40_init_client,
7595 .shutdown_client = nfs40_shutdown_client,
36281caa 7596 .match_stateid = nfs4_match_stateid,
fca78d6d 7597 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7598 .free_lock_state = nfs4_release_lockowner,
9915ea7e 7599 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 7600 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7601 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7602 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7603};
7604
7605#if defined(CONFIG_NFS_V4_1)
7606static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7607 .minor_version = 1,
39c6daae
TM		 7608 .init_caps = NFS_CAP_READDIRPLUS
7609 | NFS_CAP_ATOMIC_OPEN
7610 | NFS_CAP_CHANGE_ATTR
3b66486c 7611 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7612 | NFS_CAP_STATEID_NFSV41
7613 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7614 .init_client = nfs41_init_client,
7615 .shutdown_client = nfs41_shutdown_client,
36281caa 7616 .match_stateid = nfs41_match_stateid,
fca78d6d 7617 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7618 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7619 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 7620 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7621 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7622 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7623};
7624#endif
7625
42c2c424
SD		 7626#if defined(CONFIG_NFS_V4_2)
7627static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7628 .minor_version = 2,
7017310a
BS		 7629 .init_caps = NFS_CAP_READDIRPLUS
7630 | NFS_CAP_ATOMIC_OPEN
7631 | NFS_CAP_CHANGE_ATTR
7632 | NFS_CAP_POSIX_LOCK
7633 | NFS_CAP_STATEID_NFSV41
7634 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7635 .init_client = nfs41_init_client,
7636 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 7637 .match_stateid = nfs41_match_stateid,
7638 .find_root_sec = nfs41_find_root_sec,
7017310a 7639 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7640 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 7641 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7642 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7643 .state_renewal_ops = &nfs41_state_renewal_ops,
7644};
7645#endif
7646
97dc1359
TM		 7647const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7648 [0] = &nfs_v4_0_minor_ops,
7649#if defined(CONFIG_NFS_V4_1)
7650 [1] = &nfs_v4_1_minor_ops,
7651#endif
42c2c424
SD		 7652#if defined(CONFIG_NFS_V4_2)
7653 [2] = &nfs_v4_2_minor_ops,
7654#endif
97dc1359
TM		 7655};
7656
17f26b12 7657static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7658 .create = nfs_create,
7659 .lookup = nfs_lookup,
7660 .atomic_open = nfs_atomic_open,
7661 .link = nfs_link,
7662 .unlink = nfs_unlink,
7663 .symlink = nfs_symlink,
7664 .mkdir = nfs_mkdir,
7665 .rmdir = nfs_rmdir,
7666 .mknod = nfs_mknod,
7667 .rename = nfs_rename,
7668 .permission = nfs_permission,
7669 .getattr = nfs_getattr,
7670 .setattr = nfs_setattr,
7671 .getxattr = generic_getxattr,
7672 .setxattr = generic_setxattr,
7673 .listxattr = generic_listxattr,
7674 .removexattr = generic_removexattr,
7675};
7676
92e1d5be 7677static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7678 .permission = nfs_permission,
7679 .getattr = nfs_getattr,
7680 .setattr = nfs_setattr,
64c2ce8b
AK		 7681 .getxattr = generic_getxattr,
7682 .setxattr = generic_setxattr,
7683 .listxattr = generic_listxattr,
7684 .removexattr = generic_removexattr,
6b3b5496
BF		 7685};
7686
509de811 7687const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7688 .version = 4, /* protocol version */
7689 .dentry_ops = &nfs4_dentry_operations,
7690 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7691 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7692 .file_ops = &nfs4_file_operations,
1da177e4 7693 .getroot = nfs4_proc_get_root,
281cad46 7694 .submount = nfs4_submount,
ff9099f2 7695 .try_mount = nfs4_try_mount,
1da177e4
LT		 7696 .getattr = nfs4_proc_getattr,
7697 .setattr = nfs4_proc_setattr,
7698 .lookup = nfs4_proc_lookup,
7699 .access = nfs4_proc_access,
7700 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7701 .create = nfs4_proc_create,
7702 .remove = nfs4_proc_remove,
7703 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7704 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7705 .unlink_done = nfs4_proc_unlink_done,
7706 .rename = nfs4_proc_rename,
d3d4152a 7707 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7708 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7709 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7710 .link = nfs4_proc_link,
7711 .symlink = nfs4_proc_symlink,
7712 .mkdir = nfs4_proc_mkdir,
7713 .rmdir = nfs4_proc_remove,
7714 .readdir = nfs4_proc_readdir,
7715 .mknod = nfs4_proc_mknod,
7716 .statfs = nfs4_proc_statfs,
7717 .fsinfo = nfs4_proc_fsinfo,
7718 .pathconf = nfs4_proc_pathconf,
e9326dca 7719 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7720 .decode_dirent = nfs4_decode_dirent,
7721 .read_setup = nfs4_proc_read_setup,
1abb5088 7722 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7723 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7724 .read_done = nfs4_read_done,
1da177e4 7725 .write_setup = nfs4_proc_write_setup,
57208fa7 7726 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7727 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7728 .write_done = nfs4_write_done,
1da177e4 7729 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7730 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7731 .commit_done = nfs4_commit_done,
1da177e4 7732 .lock = nfs4_proc_lock,
e50a1c2e 7733 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7734 .close_context = nfs4_close_context,
2b484297 7735 .open_context = nfs4_atomic_open,
011e2a7f 7736 .have_delegation = nfs4_have_delegation,
57ec14c5 7737 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7738 .alloc_client = nfs4_alloc_client,
45a52a02 7739 .init_client = nfs4_init_client,
cdb7eced 7740 .free_client = nfs4_free_client,
1179acc6
BS		 7741 .create_server = nfs4_create_server,
7742 .clone_server = nfs_clone_server,
1da177e4
LT		 7743};
7744
64c2ce8b
AK		 7745static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7746 .prefix = XATTR_NAME_NFSV4_ACL,
7747 .list = nfs4_xattr_list_nfs4_acl,
7748 .get = nfs4_xattr_get_nfs4_acl,
7749 .set = nfs4_xattr_set_nfs4_acl,
7750};
7751
7752const struct xattr_handler *nfs4_xattr_handlers[] = {
7753 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7754#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7755 &nfs4_xattr_nfs4_label_handler,
7756#endif
64c2ce8b
AK		 7757 NULL
7758};
7759
1da177e4
LT		 7760/*
7761 * Local variables:
7762 * c-basic-offset: 8
7763 * End:
7764 */
Linux 6.x block layer and io_uring tree(s)