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