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NFSv4: Add tracepoints for debugging the idmapper
[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
438
452e9352 439static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 440{
1da177e4
LT		 441 spin_lock(&clp->cl_lock);
442 if (time_before(clp->cl_last_renewal,timestamp))
443 clp->cl_last_renewal = timestamp;
444 spin_unlock(&clp->cl_lock);
445}
446
452e9352
TM		 447static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
448{
449 do_renew_lease(server->nfs_client, timestamp);
450}
451
cccef3b9
AA		 452#if defined(CONFIG_NFS_V4_1)
453
d185a334 454static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 455{
e3725ec0 456 struct nfs4_session *session;
13615871 457 struct nfs4_slot_table *tbl;
c10e4498 458 bool send_new_highest_used_slotid = false;
13615871 459
dfb4f309 460 if (!res->sr_slot) {
13615871
AA		 461 /* just wake up the next guy waiting since
462 * we may have not consumed a slot after all */
691daf3b 463 dprintk("%s: No slot\n", __func__);
35dc1d74 464 return;
13615871 465 }
e3725ec0
TM		 466 tbl = res->sr_slot->table;
467 session = tbl->session;
ea028ac9 468
35dc1d74 469 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 470 /* Be nice to the server: try to ensure that the last transmitted
471 * value for highest_user_slotid <= target_highest_slotid
472 */
473 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
474 send_new_highest_used_slotid = true;
475
b75ad4cd
TM		 476 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
477 send_new_highest_used_slotid = false;
478 goto out_unlock;
479 }
f4af6e2a 480 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 481
482 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
483 send_new_highest_used_slotid = false;
b75ad4cd 484out_unlock:
35dc1d74 485 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 486 res->sr_slot = NULL;
c10e4498
TM		 487 if (send_new_highest_used_slotid)
488 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 489}
490
14516c3a 491static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 492{
e3725ec0 493 struct nfs4_session *session;
933602e3 494 struct nfs4_slot *slot;
14516c3a 495 struct nfs_client *clp;
ac20d163 496 bool interrupted = false;
85563073 497 int ret = 1;
b0df806c 498
468f8613
BS		 499 /* don't increment the sequence number if the task wasn't sent */
500 if (!RPC_WAS_SENT(task))
b0df806c
AA		 501 goto out;
502
933602e3 503 slot = res->sr_slot;
e3725ec0 504 session = slot->table->session;
933602e3 505
ac20d163
TM		 506 if (slot->interrupted) {
507 slot->interrupted = 0;
508 interrupted = true;
509 }
510
691daf3b 511 /* Check the SEQUENCE operation status */
14516c3a
TM		 512 switch (res->sr_status) {
513 case 0:
b0df806c 514 /* Update the slot's sequence and clientid lease timer */
933602e3 515 ++slot->seq_nr;
e3725ec0 516 clp = session->clp;
8e63b6a8 517 do_renew_lease(clp, res->sr_timestamp);
0629e370 518 /* Check sequence flags */
b4410c2f
TM		 519 if (res->sr_status_flags != 0)
520 nfs4_schedule_lease_recovery(clp);
464ee9f9 521 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 522 break;
ac20d163
TM		 523 case 1:
524 /*
525 * sr_status remains 1 if an RPC level error occurred.
526 * The server may or may not have processed the sequence
527 * operation..
528 * Mark the slot as having hosted an interrupted RPC call.
529 */
530 slot->interrupted = 1;
531 goto out;
14516c3a
TM		 532 case -NFS4ERR_DELAY:
533 /* The server detected a resend of the RPC call and
534 * returned NFS4ERR_DELAY as per Section 2.10.6.2
535 * of RFC5661.
536 */
df2fabff 537 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 538 __func__,
df2fabff 539 slot->slot_nr,
933602e3 540 slot->seq_nr);
14516c3a 541 goto out_retry;
85563073
TM		 542 case -NFS4ERR_BADSLOT:
543 /*
544 * The slot id we used was probably retired. Try again
545 * using a different slot id.
546 */
e8794440
TM		 547 goto retry_nowait;
548 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 549 /*
550 * Was the last operation on this sequence interrupted?
551 * If so, retry after bumping the sequence number.
552 */
553 if (interrupted) {
554 ++slot->seq_nr;
555 goto retry_nowait;
556 }
e8794440
TM		 557 /*
558 * Could this slot have been previously retired?
559 * If so, then the server may be expecting seq_nr = 1!
560 */
8e63b6a8
TM		 561 if (slot->seq_nr != 1) {
562 slot->seq_nr = 1;
563 goto retry_nowait;
564 }
565 break;
e8794440
TM		 566 case -NFS4ERR_SEQ_FALSE_RETRY:
567 ++slot->seq_nr;
568 goto retry_nowait;
14516c3a
TM		 569 default:
570 /* Just update the slot sequence no. */
933602e3 571 ++slot->seq_nr;
b0df806c
AA		 572 }
573out:
574 /* The session may be reset by one of the error handlers. */
575 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 576 nfs41_sequence_free_slot(res);
85563073 577 return ret;
e8794440
TM		 578retry_nowait:
579 if (rpc_restart_call_prepare(task)) {
580 task->tk_status = 0;
581 ret = 0;
582 }
583 goto out;
14516c3a 584out_retry:
d05dd4e9 585 if (!rpc_restart_call(task))
14516c3a
TM		 586 goto out;
587 rpc_delay(task, NFS4_POLL_RETRY_MAX);
588 return 0;
b0df806c
AA		 589}
590
14516c3a
TM		 591static int nfs4_sequence_done(struct rpc_task *task,
592 struct nfs4_sequence_res *res)
df896455 593{
e3725ec0 594 if (res->sr_slot == NULL)
14516c3a
TM		 595 return 1;
596 return nfs41_sequence_done(task, res);
df896455
TM		 597}
598
9d12b216
TM		 599static void nfs41_init_sequence(struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res, int cache_reply)
601{
2b2fa717 602 args->sa_slot = NULL;
9d12b216 603 args->sa_cache_this = 0;
8fe72bac 604 args->sa_privileged = 0;
9d12b216
TM		 605 if (cache_reply)
606 args->sa_cache_this = 1;
9d12b216
TM		 607 res->sr_slot = NULL;
608}
609
8fe72bac
TM		 610static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
611{
612 args->sa_privileged = 1;
613}
614
dc70d7b3 615int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
ce5039c1
AA		 618 struct rpc_task *task)
619{
fbcd4abc
AA		 620 struct nfs4_slot *slot;
621 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 622
623 dprintk("--> %s\n", __func__);
ce5039c1 624 /* slot already allocated? */
dfb4f309 625 if (res->sr_slot != NULL)
d9afbd1b 626 goto out_success;
ce5039c1 627
fbcd4abc
AA		 628 tbl = &session->fc_slot_table;
629
69d206b5
TM		 630 task->tk_timeout = 0;
631
fbcd4abc 632 spin_lock(&tbl->slot_tbl_lock);
774d5f14 633 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 634 !args->sa_privileged) {
0b1c8fc4 635 /* The state manager will wait until the slot table is empty */
0b1c8fc4 636 dprintk("%s session is draining\n", __func__);
7b939a3f 637 goto out_sleep;
689cf5c1
AB		 638 }
639
2dc03b7f 640 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 641 if (IS_ERR(slot)) {
642 /* If out of memory, try again in 1/4 second */
643 if (slot == ERR_PTR(-ENOMEM))
644 task->tk_timeout = HZ >> 2;
fbcd4abc 645 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 646 goto out_sleep;
fbcd4abc
AA		 647 }
648 spin_unlock(&tbl->slot_tbl_lock);
649
2b2fa717 650 args->sa_slot = slot;
fbcd4abc 651
2dc03b7f
TM		 652 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
653 slot->slot_nr, slot->seq_nr);
fbcd4abc 654
dfb4f309 655 res->sr_slot = slot;
8e63b6a8 656 res->sr_timestamp = jiffies;
2a6e26cd 657 res->sr_status_flags = 0;
fbcd4abc
AA		 658 /*
659 * sr_status is only set in decode_sequence, and so will remain
660 * set to 1 if an rpc level failure occurs.
661 */
662 res->sr_status = 1;
d9afbd1b
TM		 663out_success:
664 rpc_call_start(task);
ce5039c1 665 return 0;
7b939a3f 666out_sleep:
8fe72bac
TM		 667 /* Privileged tasks are queued with top priority */
668 if (args->sa_privileged)
1e1093c7
TM		 669 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
670 NULL, RPC_PRIORITY_PRIVILEGED);
671 else
672 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 673 spin_unlock(&tbl->slot_tbl_lock);
674 return -EAGAIN;
ce5039c1 675}
dc70d7b3 676EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 677
035168ab 678int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
ce5039c1
AA		 681 struct rpc_task *task)
682{
035168ab 683 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 684 int ret = 0;
685
d9afbd1b
TM		 686 if (session == NULL) {
687 rpc_call_start(task);
035168ab 688 goto out;
d9afbd1b 689 }
035168ab 690
df2fabff 691 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 692 __func__, session->clp, session, res->sr_slot ?
df2fabff 693 res->sr_slot->slot_nr : -1);
ce5039c1 694
9d12b216 695 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 696out:
697 dprintk("<-- %s status=%d\n", __func__, ret);
698 return ret;
699}
700
701struct nfs41_call_sync_data {
035168ab 702 const struct nfs_server *seq_server;
ce5039c1
AA		 703 struct nfs4_sequence_args *seq_args;
704 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 705};
706
707static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
708{
709 struct nfs41_call_sync_data *data = calldata;
6ba7db34 710 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 711
035168ab
TM		 712 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
713
d9afbd1b 714 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 715}
716
69ab40c4
AA		 717static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
718{
719 struct nfs41_call_sync_data *data = calldata;
720
14516c3a 721 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 722}
723
17280175 724static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 725 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 726 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 727};
728
7c513058
BS		 729static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
730 struct nfs_server *server,
ce5039c1
AA		 731 struct rpc_message *msg,
732 struct nfs4_sequence_args *args,
8fe72bac 733 struct nfs4_sequence_res *res)
ce5039c1
AA		 734{
735 int ret;
736 struct rpc_task *task;
737 struct nfs41_call_sync_data data = {
035168ab 738 .seq_server = server,
ce5039c1
AA		 739 .seq_args = args,
740 .seq_res = res,
ce5039c1
AA		 741 };
742 struct rpc_task_setup task_setup = {
7c513058 743 .rpc_client = clnt,
ce5039c1
AA		 744 .rpc_message = msg,
745 .callback_ops = &nfs41_call_sync_ops,
746 .callback_data = &data
747 };
748
ce5039c1
AA		 749 task = rpc_run_task(&task_setup);
750 if (IS_ERR(task))
751 ret = PTR_ERR(task);
752 else {
753 ret = task->tk_status;
754 rpc_put_task(task);
755 }
756 return ret;
757}
758
df896455 759#else
8fe72bac 760static
9d12b216
TM		 761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
8fe72bac
TM		 766static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
767{
768}
769
770
14516c3a
TM		 771static int nfs4_sequence_done(struct rpc_task *task,
772 struct nfs4_sequence_res *res)
df896455 773{
14516c3a 774 return 1;
df896455 775}
cccef3b9
AA		 776#endif /* CONFIG_NFS_V4_1 */
777
fd0c0953 778static
7c513058
BS		 779int _nfs4_call_sync(struct rpc_clnt *clnt,
780 struct nfs_server *server,
cccef3b9
AA		 781 struct rpc_message *msg,
782 struct nfs4_sequence_args *args,
fd0c0953 783 struct nfs4_sequence_res *res)
cccef3b9 784{
7c513058 785 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 786}
787
fd0c0953 788static
7c513058
BS		 789int nfs4_call_sync(struct rpc_clnt *clnt,
790 struct nfs_server *server,
e73b83f2
BS		 791 struct rpc_message *msg,
792 struct nfs4_sequence_args *args,
793 struct nfs4_sequence_res *res,
794 int cache_reply)
795{
fd0c0953 796 nfs41_init_sequence(args, res, cache_reply);
7c513058 797 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 798 args, res);
e73b83f2 799}
cccef3b9 800
38478b24 801static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 802{
38478b24 803 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 804
38478b24 805 spin_lock(&dir->i_lock);
359d7d1c 806 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 807 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 808 nfs_force_lookup_revalidate(dir);
a9a4a87a 809 dir->i_version = cinfo->after;
de242c0b 810 nfs_fscache_invalidate(dir);
38478b24 811 spin_unlock(&dir->i_lock);
1da177e4
LT		 812}
813
e56e0b78 814struct nfs4_opendata {
c6d00e63 815 struct kref kref;
e56e0b78
TM		 816 struct nfs_openargs o_arg;
817 struct nfs_openres o_res;
cdd4e68b
TM		 818 struct nfs_open_confirmargs c_arg;
819 struct nfs_open_confirmres c_res;
6926afd1
TM		 820 struct nfs4_string owner_name;
821 struct nfs4_string group_name;
e56e0b78 822 struct nfs_fattr f_attr;
1775fd3e 823 struct nfs4_label *f_label;
e56e0b78 824 struct dentry *dir;
82a2c1b7 825 struct dentry *dentry;
e56e0b78 826 struct nfs4_state_owner *owner;
aac00a8d 827 struct nfs4_state *state;
e56e0b78 828 struct iattr attrs;
26e976a8 829 unsigned long timestamp;
3e309914 830 unsigned int rpc_done : 1;
bdeca1b7 831 unsigned int is_recover : 1;
24ac23ab
TM		 832 int rpc_status;
833 int cancelled;
e56e0b78
TM		 834};
835
49f9a0fa
TM		 836static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
837 int err, struct nfs4_exception *exception)
838{
839 if (err != -EINVAL)
840 return false;
841 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
842 return false;
843 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
844 exception->retry = 1;
845 return true;
846}
847
848static enum open_claim_type4
849nfs4_map_atomic_open_claim(struct nfs_server *server,
850 enum open_claim_type4 claim)
851{
852 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
853 return claim;
854 switch (claim) {
855 default:
856 return claim;
857 case NFS4_OPEN_CLAIM_FH:
858 return NFS4_OPEN_CLAIM_NULL;
859 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
860 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
861 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
862 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
863 }
864}
2ced46c2
TM		 865
866static void nfs4_init_opendata_res(struct nfs4_opendata *p)
867{
868 p->o_res.f_attr = &p->f_attr;
1775fd3e 869 p->o_res.f_label = p->f_label;
c1d51931
TM		 870 p->o_res.seqid = p->o_arg.seqid;
871 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 872 p->o_res.server = p->o_arg.server;
5f657530 873 p->o_res.access_request = p->o_arg.access;
2ced46c2 874 nfs_fattr_init(&p->f_attr);
6926afd1 875 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 876}
877
82a2c1b7 878static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 879 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 880 const struct iattr *attrs,
1775fd3e 881 struct nfs4_label *label,
4a1c0893 882 enum open_claim_type4 claim,
8535b2be 883 gfp_t gfp_mask)
e56e0b78 884{
82a2c1b7 885 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 886 struct inode *dir = parent->d_inode;
887 struct nfs_server *server = NFS_SERVER(dir);
888 struct nfs4_opendata *p;
889
8535b2be 890 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 891 if (p == NULL)
892 goto err;
14c43f76
DQ		 893
894 p->f_label = nfs4_label_alloc(server, gfp_mask);
895 if (IS_ERR(p->f_label))
896 goto err_free_p;
897
8535b2be 898 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 899 if (p->o_arg.seqid == NULL)
14c43f76 900 goto err_free_label;
82a2c1b7
AV		 901 nfs_sb_active(dentry->d_sb);
902 p->dentry = dget(dentry);
e56e0b78
TM		 903 p->dir = parent;
904 p->owner = sp;
905 atomic_inc(&sp->so_count);
dc0b027d
TM		 906 p->o_arg.open_flags = flags;
907 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 908 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
909 * will return permission denied for all bits until close */
910 if (!(flags & O_EXCL)) {
911 /* ask server to check for all possible rights as results
912 * are cached */
913 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
914 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 915 }
7539bbab 916 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 917 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
918 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 919 p->o_arg.name = &dentry->d_name;
e56e0b78 920 p->o_arg.server = server;
aa9c2669 921 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 922 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 923 p->o_arg.label = label;
49f9a0fa
TM		 924 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
925 switch (p->o_arg.claim) {
4a1c0893
TM		 926 case NFS4_OPEN_CLAIM_NULL:
927 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
928 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
929 p->o_arg.fh = NFS_FH(dir);
930 break;
931 case NFS4_OPEN_CLAIM_PREVIOUS:
932 case NFS4_OPEN_CLAIM_FH:
933 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 p->o_arg.fh = NFS_FH(dentry->d_inode);
936 }
536e43d1 937 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 938 __u32 verf[2];
d77d76ff 939
e56e0b78
TM		 940 p->o_arg.u.attrs = &p->attrs;
941 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 942
943 verf[0] = jiffies;
944 verf[1] = current->pid;
945 memcpy(p->o_arg.u.verifier.data, verf,
946 sizeof(p->o_arg.u.verifier.data));
e56e0b78 947 }
cdd4e68b
TM		 948 p->c_arg.fh = &p->o_res.fh;
949 p->c_arg.stateid = &p->o_res.stateid;
950 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 951 nfs4_init_opendata_res(p);
c6d00e63 952 kref_init(&p->kref);
e56e0b78 953 return p;
14c43f76
DQ		 954
955err_free_label:
956 nfs4_label_free(p->f_label);
957err_free_p:
e56e0b78
TM		 958 kfree(p);
959err:
960 dput(parent);
961 return NULL;
962}
963
c6d00e63 964static void nfs4_opendata_free(struct kref *kref)
e56e0b78 965{
c6d00e63
TM		 966 struct nfs4_opendata *p = container_of(kref,
967 struct nfs4_opendata, kref);
82a2c1b7 968 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 969
970 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 971 if (p->state != NULL)
972 nfs4_put_open_state(p->state);
c6d00e63 973 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 974
975 nfs4_label_free(p->f_label);
976
c6d00e63 977 dput(p->dir);
82a2c1b7
AV		 978 dput(p->dentry);
979 nfs_sb_deactive(sb);
6926afd1 980 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 981 kfree(p);
982}
983
984static void nfs4_opendata_put(struct nfs4_opendata *p)
985{
986 if (p != NULL)
987 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 988}
989
06f814a3
TM		 990static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
991{
06f814a3
TM		 992 int ret;
993
06f814a3 994 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 995 return ret;
996}
997
dc0b027d 998static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 999{
1000 int ret = 0;
dc0b027d 1001
536e43d1 1002 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1003 goto out;
1004 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1005 case FMODE_READ:
88069f77
TM		 1006 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1007 && state->n_rdonly != 0;
6ee41268
TM		 1008 break;
1009 case FMODE_WRITE:
88069f77
TM		 1010 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1011 && state->n_wronly != 0;
6ee41268
TM		 1012 break;
1013 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1014 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1015 && state->n_rdwr != 0;
6ee41268 1016 }
dc0b027d 1017out:
6ee41268
TM		 1018 return ret;
1019}
1020
dc0b027d 1021static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1022{
652f89f6
TM		 1023 if (delegation == NULL)
1024 return 0;
dc0b027d 1025 if ((delegation->type & fmode) != fmode)
aac00a8d 1026 return 0;
15c831bf 1027 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1028 return 0;
d25be546
TM		 1029 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1030 return 0;
b7391f44 1031 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1032 return 1;
1033}
1034
dc0b027d 1035static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1036{
dc0b027d 1037 switch (fmode) {
e7616923
TM		 1038 case FMODE_WRITE:
1039 state->n_wronly++;
1040 break;
1041 case FMODE_READ:
1042 state->n_rdonly++;
1043 break;
1044 case FMODE_READ|FMODE_WRITE:
1045 state->n_rdwr++;
1046 }
dc0b027d 1047 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1048}
1049
dc0b027d 1050static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1051{
1052 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1053 nfs4_stateid_copy(&state->stateid, stateid);
1054 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1055 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1056 switch (fmode) {
003707c7
TM		 1057 case FMODE_READ:
1058 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1059 break;
1060 case FMODE_WRITE:
1061 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1062 break;
1063 case FMODE_READ|FMODE_WRITE:
1064 set_bit(NFS_O_RDWR_STATE, &state->flags);
1065 }
e7616923
TM		 1066}
1067
dc0b027d 1068static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1069{
8bda4e4c 1070 write_seqlock(&state->seqlock);
dc0b027d 1071 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1072 write_sequnlock(&state->seqlock);
003707c7
TM		 1073}
1074
dc0b027d 1075static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1076{
8bda4e4c
TM		 1077 /*
1078 * Protect the call to nfs4_state_set_mode_locked and
1079 * serialise the stateid update
1080 */
1081 write_seqlock(&state->seqlock);
003707c7 1082 if (deleg_stateid != NULL) {
f597c537 1083 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1084 set_bit(NFS_DELEGATED_STATE, &state->flags);
1085 }
1086 if (open_stateid != NULL)
dc0b027d 1087 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1088 write_sequnlock(&state->seqlock);
1089 spin_lock(&state->owner->so_lock);
dc0b027d 1090 update_open_stateflags(state, fmode);
ec073428 1091 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1092}
1093
dc0b027d 1094static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1095{
1096 struct nfs_inode *nfsi = NFS_I(state->inode);
1097 struct nfs_delegation *deleg_cur;
1098 int ret = 0;
1099
dc0b027d 1100 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1101
1102 rcu_read_lock();
1103 deleg_cur = rcu_dereference(nfsi->delegation);
1104 if (deleg_cur == NULL)
1105 goto no_delegation;
1106
1107 spin_lock(&deleg_cur->lock);
17f26b12 1108 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1109 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1110 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1111 goto no_delegation_unlock;
1112
1113 if (delegation == NULL)
1114 delegation = &deleg_cur->stateid;
f597c537 1115 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1116 goto no_delegation_unlock;
1117
b7391f44 1118 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1119 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1120 ret = 1;
1121no_delegation_unlock:
1122 spin_unlock(&deleg_cur->lock);
1123no_delegation:
1124 rcu_read_unlock();
1125
1126 if (!ret && open_stateid != NULL) {
dc0b027d 1127 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1128 ret = 1;
1129 }
1130
1131 return ret;
1132}
1133
1134
dc0b027d 1135static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1136{
1137 struct nfs_delegation *delegation;
1138
1139 rcu_read_lock();
1140 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1141 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1142 rcu_read_unlock();
1143 return;
1144 }
1145 rcu_read_unlock();
57ec14c5 1146 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1147}
1148
6ee41268 1149static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1150{
1151 struct nfs4_state *state = opendata->state;
1152 struct nfs_inode *nfsi = NFS_I(state->inode);
1153 struct nfs_delegation *delegation;
f448badd 1154 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1155 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1156 nfs4_stateid stateid;
1157 int ret = -EAGAIN;
1158
aac00a8d 1159 for (;;) {
dc0b027d 1160 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1161 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1162 if (can_open_cached(state, fmode, open_mode)) {
1163 update_open_stateflags(state, fmode);
6ee41268 1164 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1165 goto out_return_state;
1166 }
1167 spin_unlock(&state->owner->so_lock);
1168 }
34310430
TM		 1169 rcu_read_lock();
1170 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1171 if (!can_open_delegated(delegation, fmode)) {
34310430 1172 rcu_read_unlock();
aac00a8d 1173 break;
34310430 1174 }
aac00a8d 1175 /* Save the delegation */
f597c537 1176 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1177 rcu_read_unlock();
fa332941 1178 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1179 if (!opendata->is_recover) {
1180 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1181 if (ret != 0)
1182 goto out;
1183 }
aac00a8d 1184 ret = -EAGAIN;
34310430
TM		 1185
1186 /* Try to update the stateid using the delegation */
dc0b027d 1187 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1188 goto out_return_state;
aac00a8d 1189 }
aac00a8d
TM		 1190out:
1191 return ERR_PTR(ret);
1192out_return_state:
1193 atomic_inc(&state->count);
1194 return state;
1195}
1196
e23008ec
AA		 1197static void
1198nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1199{
1200 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1201 struct nfs_delegation *delegation;
1202 int delegation_flags = 0;
1203
1204 rcu_read_lock();
1205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1206 if (delegation)
1207 delegation_flags = delegation->flags;
1208 rcu_read_unlock();
1209 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1210 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1211 "returning a delegation for "
1212 "OPEN(CLAIM_DELEGATE_CUR)\n",
1213 clp->cl_hostname);
1214 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1215 nfs_inode_set_delegation(state->inode,
1216 data->owner->so_cred,
1217 &data->o_res);
1218 else
1219 nfs_inode_reclaim_delegation(state->inode,
1220 data->owner->so_cred,
1221 &data->o_res);
1222}
1223
1224/*
1225 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1226 * and update the nfs4_state.
1227 */
1228static struct nfs4_state *
1229_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1230{
1231 struct inode *inode = data->state->inode;
1232 struct nfs4_state *state = data->state;
1233 int ret;
1234
1235 if (!data->rpc_done) {
1236 ret = data->rpc_status;
1237 goto err;
1238 }
1239
1240 ret = -ESTALE;
1241 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1242 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1243 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1244 goto err;
1245
1246 ret = -ENOMEM;
1247 state = nfs4_get_open_state(inode, data->owner);
1248 if (state == NULL)
1249 goto err;
1250
1251 ret = nfs_refresh_inode(inode, &data->f_attr);
1252 if (ret)
1253 goto err;
1254
aa9c2669
DQ		 1255 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1256
e23008ec
AA		 1257 if (data->o_res.delegation_type != 0)
1258 nfs4_opendata_check_deleg(data, state);
1259 update_open_stateid(state, &data->o_res.stateid, NULL,
1260 data->o_arg.fmode);
1261
1262 return state;
1263err:
1264 return ERR_PTR(ret);
1265
1266}
1267
1268static struct nfs4_state *
1269_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1270{
1271 struct inode *inode;
1272 struct nfs4_state *state = NULL;
1b370bc2 1273 int ret;
24ac23ab 1274
aac00a8d 1275 if (!data->rpc_done) {
6ee41268 1276 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1277 goto out;
1278 }
1279
1b370bc2 1280 ret = -EAGAIN;
24ac23ab 1281 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1282 goto err;
1775fd3e 1283 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1284 ret = PTR_ERR(inode);
03f28e3a 1285 if (IS_ERR(inode))
1b370bc2
TM		 1286 goto err;
1287 ret = -ENOMEM;
24ac23ab
TM		 1288 state = nfs4_get_open_state(inode, data->owner);
1289 if (state == NULL)
1b370bc2 1290 goto err_put_inode;
e23008ec
AA		 1291 if (data->o_res.delegation_type != 0)
1292 nfs4_opendata_check_deleg(data, state);
34310430 1293 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1294 data->o_arg.fmode);
24ac23ab 1295 iput(inode);
aac00a8d 1296out:
7aa262b5 1297 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1298 return state;
1b370bc2
TM		 1299err_put_inode:
1300 iput(inode);
1301err:
1302 return ERR_PTR(ret);
24ac23ab
TM		 1303}
1304
e23008ec
AA		 1305static struct nfs4_state *
1306nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1307{
1308 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1309 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1310 return _nfs4_opendata_to_nfs4_state(data);
1311}
1312
864472e9
TM		 1313static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1314{
1315 struct nfs_inode *nfsi = NFS_I(state->inode);
1316 struct nfs_open_context *ctx;
1317
1318 spin_lock(&state->inode->i_lock);
1319 list_for_each_entry(ctx, &nfsi->open_files, list) {
1320 if (ctx->state != state)
1321 continue;
1322 get_nfs_open_context(ctx);
1323 spin_unlock(&state->inode->i_lock);
1324 return ctx;
1325 }
1326 spin_unlock(&state->inode->i_lock);
1327 return ERR_PTR(-ENOENT);
1328}
1329
4a1c0893
TM		 1330static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1331 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1332{
1333 struct nfs4_opendata *opendata;
1334
4a1c0893 1335 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1336 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1337 if (opendata == NULL)
1338 return ERR_PTR(-ENOMEM);
1339 opendata->state = state;
1340 atomic_inc(&state->count);
1341 return opendata;
1342}
1343
dc0b027d 1344static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1345{
2ced46c2 1346 struct nfs4_state *newstate;
864472e9
TM		 1347 int ret;
1348
dc0b027d
TM		 1349 opendata->o_arg.open_flags = 0;
1350 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1351 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1352 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1353 nfs4_init_opendata_res(opendata);
b257957e 1354 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1355 if (ret != 0)
1356 return ret;
2ced46c2 1357 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1358 if (IS_ERR(newstate))
1359 return PTR_ERR(newstate);
643168c2 1360 nfs4_close_state(newstate, fmode);
2ced46c2 1361 *res = newstate;
864472e9
TM		 1362 return 0;
1363}
1364
1365static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1366{
864472e9 1367 struct nfs4_state *newstate;
864472e9
TM		 1368 int ret;
1369
1370 /* memory barrier prior to reading state->n_* */
2ced46c2 1371 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1372 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1373 smp_rmb();
1374 if (state->n_rdwr != 0) {
b0ed9dbc 1375 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1376 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1377 if (ret != 0)
1378 return ret;
2ced46c2
TM		 1379 if (newstate != state)
1380 return -ESTALE;
864472e9
TM		 1381 }
1382 if (state->n_wronly != 0) {
b0ed9dbc 1383 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1384 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1385 if (ret != 0)
1386 return ret;
2ced46c2
TM		 1387 if (newstate != state)
1388 return -ESTALE;
864472e9
TM		 1389 }
1390 if (state->n_rdonly != 0) {
b0ed9dbc 1391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1392 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1393 if (ret != 0)
1394 return ret;
2ced46c2
TM		 1395 if (newstate != state)
1396 return -ESTALE;
864472e9 1397 }
1ac7e2fd
TM		 1398 /*
1399 * We may have performed cached opens for all three recoveries.
1400 * Check if we need to update the current stateid.
1401 */
1402 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1403 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1404 write_seqlock(&state->seqlock);
1ac7e2fd 1405 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1406 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1407 write_sequnlock(&state->seqlock);
1ac7e2fd 1408 }
864472e9
TM		 1409 return 0;
1410}
1411
1da177e4
LT		 1412/*
1413 * OPEN_RECLAIM:
1414 * reclaim state on the server after a reboot.
1da177e4 1415 */
539cd03a 1416static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1417{
1ac7e2fd 1418 struct nfs_delegation *delegation;
864472e9 1419 struct nfs4_opendata *opendata;
dc0b027d 1420 fmode_t delegation_type = 0;
1da177e4
LT		 1421 int status;
1422
4a1c0893
TM		 1423 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1424 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1425 if (IS_ERR(opendata))
1426 return PTR_ERR(opendata);
1ac7e2fd
TM		 1427 rcu_read_lock();
1428 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1429 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1430 delegation_type = delegation->type;
1ac7e2fd 1431 rcu_read_unlock();
864472e9
TM		 1432 opendata->o_arg.u.delegation_type = delegation_type;
1433 status = nfs4_open_recover(opendata, state);
c6d00e63 1434 nfs4_opendata_put(opendata);
1da177e4
LT		 1435 return status;
1436}
1437
539cd03a 1438static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1439{
1440 struct nfs_server *server = NFS_SERVER(state->inode);
1441 struct nfs4_exception exception = { };
1442 int err;
1443 do {
539cd03a 1444 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1445 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1446 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1447 continue;
168667c4 1448 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1449 break;
1450 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1451 } while (exception.retry);
1452 return err;
1453}
1454
864472e9
TM		 1455static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1456{
1457 struct nfs_open_context *ctx;
1458 int ret;
1459
1460 ctx = nfs4_state_find_open_context(state);
1461 if (IS_ERR(ctx))
91876b13 1462 return -EAGAIN;
539cd03a 1463 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1464 put_nfs_open_context(ctx);
1465 return ret;
1466}
1467
db4f2e63 1468static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1469{
be76b5b6
TM		 1470 switch (err) {
1471 default:
1472 printk(KERN_ERR "NFS: %s: unhandled error "
1473 "%d.\n", __func__, err);
1474 case 0:
1475 case -ENOENT:
1476 case -ESTALE:
1477 break;
1478 case -NFS4ERR_BADSESSION:
1479 case -NFS4ERR_BADSLOT:
1480 case -NFS4ERR_BAD_HIGH_SLOT:
1481 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1482 case -NFS4ERR_DEADSESSION:
1483 set_bit(NFS_DELEGATED_STATE, &state->flags);
1484 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1485 return -EAGAIN;
1486 case -NFS4ERR_STALE_CLIENTID:
1487 case -NFS4ERR_STALE_STATEID:
1488 set_bit(NFS_DELEGATED_STATE, &state->flags);
1489 case -NFS4ERR_EXPIRED:
1490 /* Don't recall a delegation if it was lost */
1491 nfs4_schedule_lease_recovery(server->nfs_client);
1492 return -EAGAIN;
1493 case -NFS4ERR_DELEG_REVOKED:
1494 case -NFS4ERR_ADMIN_REVOKED:
1495 case -NFS4ERR_BAD_STATEID:
db4f2e63 1496 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1497 nfs_inode_find_state_and_recover(state->inode,
1498 stateid);
1499 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1500 return 0;
1501 case -NFS4ERR_DELAY:
1502 case -NFS4ERR_GRACE:
1503 set_bit(NFS_DELEGATED_STATE, &state->flags);
1504 ssleep(1);
1505 return -EAGAIN;
db4f2e63
TM		 1506 case -ENOMEM:
1507 case -NFS4ERR_DENIED:
1508 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1509 return 0;
be76b5b6 1510 }
1da177e4
LT		 1511 return err;
1512}
1513
db4f2e63
TM		 1514int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1515{
1516 struct nfs_server *server = NFS_SERVER(state->inode);
1517 struct nfs4_opendata *opendata;
1518 int err;
1519
1520 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1521 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 if (IS_ERR(opendata))
1523 return PTR_ERR(opendata);
1524 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1525 err = nfs4_open_recover(opendata, state);
1526 nfs4_opendata_put(opendata);
1527 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1528}
1529
cdd4e68b
TM		 1530static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1531{
1532 struct nfs4_opendata *data = calldata;
1533
1534 data->rpc_status = task->tk_status;
26e976a8 1535 if (data->rpc_status == 0) {
f597c537 1536 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1537 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1538 renew_lease(data->o_res.server, data->timestamp);
3e309914 1539 data->rpc_done = 1;
26e976a8 1540 }
cdd4e68b
TM		 1541}
1542
1543static void nfs4_open_confirm_release(void *calldata)
1544{
1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state *state = NULL;
1547
1548 /* If this request hasn't been cancelled, do nothing */
1549 if (data->cancelled == 0)
1550 goto out_free;
1551 /* In case of error, no cleanup! */
3e309914 1552 if (!data->rpc_done)
cdd4e68b 1553 goto out_free;
cdd4e68b 1554 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1555 if (!IS_ERR(state))
643168c2 1556 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1557out_free:
c6d00e63 1558 nfs4_opendata_put(data);
cdd4e68b
TM		 1559}
1560
1561static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1562 .rpc_call_done = nfs4_open_confirm_done,
1563 .rpc_release = nfs4_open_confirm_release,
1564};
1565
1566/*
1567 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1568 */
1569static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1570{
1571 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1572 struct rpc_task *task;
5138fde0
TM		 1573 struct rpc_message msg = {
1574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1575 .rpc_argp = &data->c_arg,
1576 .rpc_resp = &data->c_res,
1577 .rpc_cred = data->owner->so_cred,
1578 };
c970aa85
TM		 1579 struct rpc_task_setup task_setup_data = {
1580 .rpc_client = server->client,
5138fde0 1581 .rpc_message = &msg,
c970aa85
TM		 1582 .callback_ops = &nfs4_open_confirm_ops,
1583 .callback_data = data,
101070ca 1584 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1585 .flags = RPC_TASK_ASYNC,
1586 };
1da177e4
LT		 1587 int status;
1588
c6d00e63 1589 kref_get(&data->kref);
3e309914
TM		 1590 data->rpc_done = 0;
1591 data->rpc_status = 0;
5138fde0 1592 data->timestamp = jiffies;
c970aa85 1593 task = rpc_run_task(&task_setup_data);
7a1218a2 1594 if (IS_ERR(task))
cdd4e68b 1595 return PTR_ERR(task);
cdd4e68b
TM		 1596 status = nfs4_wait_for_completion_rpc_task(task);
1597 if (status != 0) {
1598 data->cancelled = 1;
1599 smp_wmb();
1600 } else
1601 status = data->rpc_status;
e6b3c4db 1602 rpc_put_task(task);
1da177e4
LT		 1603 return status;
1604}
1605
24ac23ab 1606static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1607{
24ac23ab
TM		 1608 struct nfs4_opendata *data = calldata;
1609 struct nfs4_state_owner *sp = data->owner;
549b19cc 1610 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1611
24ac23ab 1612 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1613 goto out_wait;
aac00a8d
TM		 1614 /*
1615 * Check if we still need to send an OPEN call, or if we can use
1616 * a delegation instead.
1617 */
1618 if (data->state != NULL) {
1619 struct nfs_delegation *delegation;
1620
dc0b027d 1621 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1622 goto out_no_action;
aac00a8d
TM		 1623 rcu_read_lock();
1624 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1625 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1626 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1627 can_open_delegated(delegation, data->o_arg.fmode))
1628 goto unlock_no_action;
aac00a8d
TM		 1629 rcu_read_unlock();
1630 }
95b72eb0 1631 /* Update client id. */
549b19cc 1632 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1633 switch (data->o_arg.claim) {
1634 case NFS4_OPEN_CLAIM_PREVIOUS:
1635 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1636 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1637 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1638 case NFS4_OPEN_CLAIM_FH:
1639 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1640 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1641 }
26e976a8 1642 data->timestamp = jiffies;
035168ab 1643 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1644 &data->o_arg.seq_args,
2240a9e2
TM		 1645 &data->o_res.seq_res,
1646 task) != 0)
1647 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1648
1649 /* Set the create mode (note dependency on the session type) */
1650 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1651 if (data->o_arg.open_flags & O_EXCL) {
1652 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1653 if (nfs4_has_persistent_session(clp))
1654 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1655 else if (clp->cl_mvops->minor_version > 0)
1656 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1657 }
6ee41268 1658 return;
652f89f6
TM		 1659unlock_no_action:
1660 rcu_read_unlock();
6ee41268
TM		 1661out_no_action:
1662 task->tk_action = NULL;
c8da19b9 1663out_wait:
b75ad4cd 1664 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1665}
1666
24ac23ab
TM		 1667static void nfs4_open_done(struct rpc_task *task, void *calldata)
1668{
1669 struct nfs4_opendata *data = calldata;
1da177e4 1670
24ac23ab 1671 data->rpc_status = task->tk_status;
d898528c 1672
14516c3a
TM		 1673 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1674 return;
d898528c 1675
24ac23ab 1676 if (task->tk_status == 0) {
807d66d8
TM		 1677 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1678 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1679 case S_IFREG:
1680 break;
1681 case S_IFLNK:
24ac23ab 1682 data->rpc_status = -ELOOP;
6f926b5b
TM		 1683 break;
1684 case S_IFDIR:
24ac23ab 1685 data->rpc_status = -EISDIR;
6f926b5b
TM		 1686 break;
1687 default:
24ac23ab 1688 data->rpc_status = -ENOTDIR;
807d66d8 1689 }
6f926b5b 1690 }
26e976a8 1691 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1692 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1693 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1694 }
3e309914 1695 data->rpc_done = 1;
24ac23ab 1696}
6f926b5b 1697
24ac23ab
TM		 1698static void nfs4_open_release(void *calldata)
1699{
1700 struct nfs4_opendata *data = calldata;
1701 struct nfs4_state *state = NULL;
1702
1703 /* If this request hasn't been cancelled, do nothing */
1704 if (data->cancelled == 0)
1705 goto out_free;
1706 /* In case of error, no cleanup! */
3e309914 1707 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1708 goto out_free;
1709 /* In case we need an open_confirm, no cleanup! */
1710 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1711 goto out_free;
24ac23ab 1712 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1713 if (!IS_ERR(state))
643168c2 1714 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1715out_free:
c6d00e63 1716 nfs4_opendata_put(data);
24ac23ab
TM		 1717}
1718
1719static const struct rpc_call_ops nfs4_open_ops = {
1720 .rpc_call_prepare = nfs4_open_prepare,
1721 .rpc_call_done = nfs4_open_done,
1722 .rpc_release = nfs4_open_release,
1723};
1724
b257957e 1725static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1726{
1727 struct inode *dir = data->dir->d_inode;
1728 struct nfs_server *server = NFS_SERVER(dir);
1729 struct nfs_openargs *o_arg = &data->o_arg;
1730 struct nfs_openres *o_res = &data->o_res;
1731 struct rpc_task *task;
5138fde0
TM		 1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1734 .rpc_argp = o_arg,
1735 .rpc_resp = o_res,
1736 .rpc_cred = data->owner->so_cred,
1737 };
c970aa85
TM		 1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
5138fde0 1740 .rpc_message = &msg,
c970aa85
TM		 1741 .callback_ops = &nfs4_open_ops,
1742 .callback_data = data,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
24ac23ab
TM		 1746 int status;
1747
9d12b216 1748 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1749 kref_get(&data->kref);
3e309914
TM		 1750 data->rpc_done = 0;
1751 data->rpc_status = 0;
2ced46c2 1752 data->cancelled = 0;
bdeca1b7
TM		 1753 data->is_recover = 0;
1754 if (isrecover) {
8fe72bac 1755 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1756 data->is_recover = 1;
1757 }
c970aa85 1758 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1759 if (IS_ERR(task))
1760 return PTR_ERR(task);
1761 status = nfs4_wait_for_completion_rpc_task(task);
1762 if (status != 0) {
1763 data->cancelled = 1;
1764 smp_wmb();
1765 } else
1766 status = data->rpc_status;
1767 rpc_put_task(task);
1768
1769 return status;
1770}
1771
1772static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1773{
1774 struct inode *dir = data->dir->d_inode;
1775 struct nfs_openres *o_res = &data->o_res;
1776 int status;
1777
1778 status = nfs4_run_open_task(data, 1);
1779 if (status != 0 || !data->rpc_done)
1780 return status;
1781
6926afd1
TM		 1782 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1783
b257957e
AB		 1784 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1785 status = _nfs4_proc_open_confirm(data);
1786 if (status != 0)
1787 return status;
1788 }
1789
1790 return status;
1791}
1792
6168f62c
WAA		 1793static int nfs4_opendata_access(struct rpc_cred *cred,
1794 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1795 struct nfs4_state *state, fmode_t fmode,
1796 int openflags)
6168f62c
WAA		 1797{
1798 struct nfs_access_entry cache;
1799 u32 mask;
1800
1801 /* access call failed or for some reason the server doesn't
1802 * support any access modes -- defer access call until later */
1803 if (opendata->o_res.access_supported == 0)
1804 return 0;
1805
1806 mask = 0;
bbd3a8ee 1807 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1808 * write mode bits, but POSIX allows the creating process to write.
1809 * use openflags to check for exec, because fmode won't
1810 * always have FMODE_EXEC set when file open for exec. */
1811 if (openflags & __FMODE_EXEC) {
1812 /* ONLY check for exec rights */
1813 mask = MAY_EXEC;
1814 } else if (fmode & FMODE_READ)
1815 mask = MAY_READ;
6168f62c
WAA		 1816
1817 cache.cred = cred;
1818 cache.jiffies = jiffies;
1819 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1820 nfs_access_add_cache(state->inode, &cache);
1821
bbd3a8ee 1822 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1823 return 0;
1824
1825 /* even though OPEN succeeded, access is denied. Close the file */
1826 nfs4_close_state(state, fmode);
998f40b5 1827 return -EACCES;
6168f62c
WAA		 1828}
1829
b257957e
AB		 1830/*
1831 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1832 */
1833static int _nfs4_proc_open(struct nfs4_opendata *data)
1834{
1835 struct inode *dir = data->dir->d_inode;
1836 struct nfs_server *server = NFS_SERVER(dir);
1837 struct nfs_openargs *o_arg = &data->o_arg;
1838 struct nfs_openres *o_res = &data->o_res;
1839 int status;
1840
1841 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1842 if (!data->rpc_done)
1843 return status;
1844 if (status != 0) {
1845 if (status == -NFS4ERR_BADNAME &&
1846 !(o_arg->open_flags & O_CREAT))
1847 return -ENOENT;
24ac23ab 1848 return status;
08ef7bd3 1849 }
24ac23ab 1850
6926afd1
TM		 1851 nfs_fattr_map_and_free_names(server, &data->f_attr);
1852
90ff0c54 1853 if (o_arg->open_flags & O_CREAT)
56ae19f3 1854 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1855 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1856 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1857 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1858 status = _nfs4_proc_open_confirm(data);
1da177e4 1859 if (status != 0)
24ac23ab 1860 return status;
1da177e4
LT		 1861 }
1862 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1863 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1864 return 0;
1da177e4
LT		 1865}
1866
d83217c1
AA		 1867static int nfs4_recover_expired_lease(struct nfs_server *server)
1868{
1869 return nfs4_client_recover_expired_lease(server->nfs_client);
1870}
1871
1da177e4
LT		 1872/*
1873 * OPEN_EXPIRED:
1874 * reclaim state on the server after a network partition.
1875 * Assumes caller holds the appropriate lock
1876 */
539cd03a 1877static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1878{
e56e0b78 1879 struct nfs4_opendata *opendata;
864472e9 1880 int ret;
1da177e4 1881
4a1c0893 1882 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1883 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1884 if (IS_ERR(opendata))
1885 return PTR_ERR(opendata);
864472e9 1886 ret = nfs4_open_recover(opendata, state);
35d05778 1887 if (ret == -ESTALE)
3d4ff43d 1888 d_drop(ctx->dentry);
c6d00e63 1889 nfs4_opendata_put(opendata);
864472e9 1890 return ret;
1da177e4
LT		 1891}
1892
a9ed2e25 1893static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1894{
539cd03a 1895 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1896 struct nfs4_exception exception = { };
1897 int err;
1898
1899 do {
539cd03a 1900 err = _nfs4_open_expired(ctx, state);
42113a75 1901 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1902 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1903 continue;
a9ed2e25
TM		 1904 switch (err) {
1905 default:
1906 goto out;
1907 case -NFS4ERR_GRACE:
1908 case -NFS4ERR_DELAY:
1909 nfs4_handle_exception(server, err, &exception);
1910 err = 0;
1911 }
202b50dc 1912 } while (exception.retry);
a9ed2e25 1913out:
202b50dc
TM		 1914 return err;
1915}
1916
1da177e4
LT		 1917static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1918{
1da177e4 1919 struct nfs_open_context *ctx;
864472e9 1920 int ret;
1da177e4 1921
864472e9
TM		 1922 ctx = nfs4_state_find_open_context(state);
1923 if (IS_ERR(ctx))
91876b13 1924 return -EAGAIN;
539cd03a 1925 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1926 put_nfs_open_context(ctx);
1927 return ret;
1da177e4
LT		 1928}
1929
f062eb6c 1930#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1931static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1932{
f062eb6c 1933 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1934 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1935 struct nfs_delegation *delegation;
1936 struct rpc_cred *cred = NULL;
1937 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1938
1939 /* If a state reset has been done, test_stateid is unneeded */
1940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1941 return;
1942
ab7cb0df
TM		 1943 /* Get the delegation credential for use by test/free_stateid */
1944 rcu_read_lock();
1945 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1946 if (delegation != NULL &&
1947 nfs4_stateid_match(&delegation->stateid, stateid)) {
1948 cred = get_rpccred(delegation->cred);
1949 rcu_read_unlock();
1950 status = nfs41_test_stateid(server, stateid, cred);
1951 } else
1952 rcu_read_unlock();
1953
3e60ffdd
CL		 1954 if (status != NFS_OK) {
1955 /* Free the stateid unless the server explicitly
1956 * informs us the stateid is unrecognized. */
1957 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1958 nfs41_free_stateid(server, stateid, cred);
6938867e 1959 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1960
6938867e
BS		 1961 write_seqlock(&state->seqlock);
1962 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1963 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1964 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1965 }
ab7cb0df
TM		 1966
1967 if (cred != NULL)
1968 put_rpccred(cred);
3e60ffdd
CL		 1969}
1970
1971/**
1972 * nfs41_check_open_stateid - possibly free an open stateid
1973 *
1974 * @state: NFSv4 state for an inode
1975 *
1976 * Returns NFS_OK if recovery for this stateid is now finished.
1977 * Otherwise a negative NFS4ERR value is returned.
1978 */
1979static int nfs41_check_open_stateid(struct nfs4_state *state)
1980{
1981 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1982 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1983 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1984 int status;
1985
1986 /* If a state reset has been done, test_stateid is unneeded */
1987 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1988 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1989 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1990 return -NFS4ERR_BAD_STATEID;
1991
ab7cb0df 1992 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1993 if (status != NFS_OK) {
1994 /* Free the stateid unless the server explicitly
1995 * informs us the stateid is unrecognized. */
1996 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1997 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1998
1999 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2000 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2001 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2002 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2003 }
2004 return status;
2005}
2006
2007static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2008{
eb64cf96 2009 int status;
b01dd1d8 2010
3e60ffdd
CL		 2011 nfs41_clear_delegation_stateid(state);
2012 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2013 if (status != NFS_OK)
2014 status = nfs4_open_expired(sp, state);
2015 return status;
f062eb6c
BS		 2016}
2017#endif
2018
aa53ed54
JL		 2019/*
2020 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2021 * fields corresponding to attributes that were used to store the verifier.
2022 * Make sure we clobber those fields in the later setattr call
2023 */
2024static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2025{
2026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2027 !(sattr->ia_valid & ATTR_ATIME_SET))
2028 sattr->ia_valid |= ATTR_ATIME;
2029
2030 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2031 !(sattr->ia_valid & ATTR_MTIME_SET))
2032 sattr->ia_valid |= ATTR_MTIME;
2033}
2034
c21443c2
TM		 2035static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2036 fmode_t fmode,
2037 int flags,
3efb9722 2038 struct nfs_open_context *ctx)
c21443c2
TM		 2039{
2040 struct nfs4_state_owner *sp = opendata->owner;
2041 struct nfs_server *server = sp->so_server;
275bb307 2042 struct dentry *dentry;
c21443c2
TM		 2043 struct nfs4_state *state;
2044 unsigned int seq;
2045 int ret;
2046
2047 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2048
2049 ret = _nfs4_proc_open(opendata);
2050 if (ret != 0)
2051 goto out;
2052
2053 state = nfs4_opendata_to_nfs4_state(opendata);
2054 ret = PTR_ERR(state);
2055 if (IS_ERR(state))
2056 goto out;
2057 if (server->caps & NFS_CAP_POSIX_LOCK)
2058 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2059
275bb307
TM		 2060 dentry = opendata->dentry;
2061 if (dentry->d_inode == NULL) {
2062 /* FIXME: Is this d_drop() ever needed? */
2063 d_drop(dentry);
2064 dentry = d_add_unique(dentry, igrab(state->inode));
2065 if (dentry == NULL) {
2066 dentry = opendata->dentry;
2067 } else if (dentry != ctx->dentry) {
2068 dput(ctx->dentry);
2069 ctx->dentry = dget(dentry);
2070 }
2071 nfs_set_verifier(dentry,
2072 nfs_save_change_attribute(opendata->dir->d_inode));
2073 }
2074
c21443c2
TM		 2075 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2076 if (ret != 0)
2077 goto out;
2078
3efb9722 2079 ctx->state = state;
c45ffdd2
TM		 2080 if (dentry->d_inode == state->inode) {
2081 nfs_inode_attach_open_context(ctx);
2082 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2083 nfs4_schedule_stateid_recovery(server, state);
2084 }
c21443c2
TM		 2085out:
2086 return ret;
2087}
2088
1da177e4 2089/*
24ac23ab 2090 * Returns a referenced nfs4_state
1da177e4 2091 */
82be417a 2092static int _nfs4_do_open(struct inode *dir,
4197a055 2093 struct nfs_open_context *ctx,
82be417a
AA		 2094 int flags,
2095 struct iattr *sattr,
959d921f 2096 struct nfs4_label *label)
1da177e4
LT		 2097{
2098 struct nfs4_state_owner *sp;
2099 struct nfs4_state *state = NULL;
2100 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2101 struct nfs4_opendata *opendata;
4197a055
TM		 2102 struct dentry *dentry = ctx->dentry;
2103 struct rpc_cred *cred = ctx->cred;
2104 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2105 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2106 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2107 struct nfs4_label *olabel = NULL;
aac00a8d 2108 int status;
1da177e4
LT		 2109
2110 /* Protect against reboot recovery conflicts */
1da177e4 2111 status = -ENOMEM;
d1e284d5
TM		 2112 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2113 if (sp == NULL) {
1da177e4
LT		 2114 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2115 goto out_err;
2116 }
58d9714a
TM		 2117 status = nfs4_recover_expired_lease(server);
2118 if (status != 0)
b4454fe1 2119 goto err_put_state_owner;
82a2c1b7
AV		 2120 if (dentry->d_inode != NULL)
2121 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2122 status = -ENOMEM;
49f9a0fa
TM		 2123 if (dentry->d_inode)
2124 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2125 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2126 label, claim, GFP_KERNEL);
e56e0b78 2127 if (opendata == NULL)
95d35cb4 2128 goto err_put_state_owner;
1da177e4 2129
14c43f76
DQ		 2130 if (label) {
2131 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2132 if (IS_ERR(olabel)) {
2133 status = PTR_ERR(olabel);
2134 goto err_opendata_put;
2135 }
2136 }
2137
82be417a
AA		 2138 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2139 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2140 if (!opendata->f_attr.mdsthreshold)
14c43f76 2141 goto err_free_label;
1549210f 2142 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2143 }
82a2c1b7
AV		 2144 if (dentry->d_inode != NULL)
2145 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2146
3efb9722 2147 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2148 if (status != 0)
14c43f76 2149 goto err_free_label;
3efb9722 2150 state = ctx->state;
6168f62c 2151
549b19cc
TM		 2152 if ((opendata->o_arg.open_flags & O_EXCL) &&
2153 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2154 nfs4_exclusive_attrset(opendata, sattr);
2155
2156 nfs_fattr_init(opendata->o_res.f_attr);
2157 status = nfs4_do_setattr(state->inode, cred,
2158 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2159 state, label, olabel);
2160 if (status == 0) {
0ab64e0e 2161 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2162 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2163 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2164 }
0ab64e0e 2165 }
82be417a
AA		 2166
2167 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2168 *ctx_th = opendata->f_attr.mdsthreshold;
2169 else
2170 kfree(opendata->f_attr.mdsthreshold);
2171 opendata->f_attr.mdsthreshold = NULL;
2172
14c43f76
DQ		 2173 nfs4_label_free(olabel);
2174
c6d00e63 2175 nfs4_opendata_put(opendata);
1da177e4 2176 nfs4_put_state_owner(sp);
1da177e4 2177 return 0;
14c43f76
DQ		 2178err_free_label:
2179 nfs4_label_free(olabel);
c6d00e63 2180err_opendata_put:
82be417a 2181 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2182 nfs4_opendata_put(opendata);
e56e0b78
TM		 2183err_put_state_owner:
2184 nfs4_put_state_owner(sp);
1da177e4 2185out_err:
1da177e4
LT		 2186 return status;
2187}
2188
2189
82be417a 2190static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2191 struct nfs_open_context *ctx,
82be417a
AA		 2192 int flags,
2193 struct iattr *sattr,
959d921f 2194 struct nfs4_label *label)
1da177e4 2195{
49f9a0fa 2196 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2197 struct nfs4_exception exception = { };
2198 struct nfs4_state *res;
2199 int status;
2200
2201 do {
959d921f 2202 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2203 res = ctx->state;
42113a75 2204 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2205 if (status == 0)
2206 break;
2207 /* NOTE: BAD_SEQID means the server and client disagree about the
2208 * book-keeping w.r.t. state-changing operations
2209 * (OPEN/CLOSE/LOCK/LOCKU...)
2210 * It is actually a sign of a bug on the client or on the server.
2211 *
2212 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2213 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2214 * have unhashed the old state_owner for us, and that we can
2215 * therefore safely retry using a new one. We should still warn
2216 * the user though...
2217 */
2218 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2219 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2220 " returned a bad sequence-id error!\n",
2221 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2222 exception.retry = 1;
2223 continue;
2224 }
550f5747
TM		 2225 /*
2226 * BAD_STATEID on OPEN means that the server cancelled our
2227 * state before it received the OPEN_CONFIRM.
2228 * Recover by retrying the request as per the discussion
2229 * on Page 181 of RFC3530.
2230 */
2231 if (status == -NFS4ERR_BAD_STATEID) {
2232 exception.retry = 1;
2233 continue;
2234 }
aac00a8d
TM		 2235 if (status == -EAGAIN) {
2236 /* We must have found a delegation */
2237 exception.retry = 1;
2238 continue;
2239 }
49f9a0fa
TM		 2240 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2241 continue;
2242 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2243 status, &exception));
2244 } while (exception.retry);
2245 return res;
2246}
2247
659bfcd6
TM		 2248static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2249 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2250 struct nfs4_state *state, struct nfs4_label *ilabel,
2251 struct nfs4_label *olabel)
1da177e4 2252{
3e4f6290 2253 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2254 struct nfs_setattrargs arg = {
3e4f6290 2255 .fh = NFS_FH(inode),
1da177e4
LT		 2256 .iap = sattr,
2257 .server = server,
2258 .bitmask = server->attr_bitmask,
1775fd3e 2259 .label = ilabel,
1da177e4
LT		 2260 };
2261 struct nfs_setattrres res = {
2262 .fattr = fattr,
1775fd3e 2263 .label = olabel,
1da177e4
LT		 2264 .server = server,
2265 };
2266 struct rpc_message msg = {
659bfcd6
TM		 2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2268 .rpc_argp = &arg,
2269 .rpc_resp = &res,
2270 .rpc_cred = cred,
1da177e4 2271 };
26e976a8 2272 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2273 fmode_t fmode;
2274 bool truncate;
65e4308d 2275 int status;
1da177e4 2276
aa9c2669
DQ		 2277 arg.bitmask = nfs4_bitmask(server, ilabel);
2278 if (ilabel)
2279 arg.bitmask = nfs4_bitmask(server, olabel);
2280
0e574af1 2281 nfs_fattr_init(fattr);
1da177e4 2282
ee3ae84e
TM		 2283 /* Servers should only apply open mode checks for file size changes */
2284 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2285 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2286
2287 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2288 /* Use that stateid */
2289 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2290 struct nfs_lockowner lockowner = {
2291 .l_owner = current->files,
2292 .l_pid = current->tgid,
2293 };
4fc8796d 2294 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2295 &lockowner);
08e9eac4 2296 } else
f597c537 2297 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2298
7c513058 2299 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2300 if (status == 0 && state != NULL)
2301 renew_lease(server, timestamp);
65e4308d 2302 return status;
1da177e4
LT		 2303}
2304
659bfcd6
TM		 2305static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2306 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2307 struct nfs4_state *state, struct nfs4_label *ilabel,
2308 struct nfs4_label *olabel)
1da177e4 2309{
3e4f6290 2310 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2311 struct nfs4_exception exception = {
2312 .state = state,
3114ea7a 2313 .inode = inode,
a1d0b5ee 2314 };
1da177e4
LT		 2315 int err;
2316 do {
1775fd3e 2317 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2318 trace_nfs4_setattr(inode, err);
451146be
TM		 2319 switch (err) {
2320 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2321 if (!(sattr->ia_valid & ATTR_SIZE)) {
2322 pr_warn_once("NFSv4: server %s is incorrectly "
2323 "applying open mode checks to "
2324 "a SETATTR that is not "
2325 "changing file size.\n",
2326 server->nfs_client->cl_hostname);
2327 }
451146be
TM		 2328 if (state && !(state->state & FMODE_WRITE)) {
2329 err = -EBADF;
2330 if (sattr->ia_valid & ATTR_OPEN)
2331 err = -EACCES;
2332 goto out;
2333 }
2334 }
2335 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2336 } while (exception.retry);
451146be 2337out:
1da177e4
LT		 2338 return err;
2339}
2340
2341struct nfs4_closedata {
2342 struct inode *inode;
2343 struct nfs4_state *state;
2344 struct nfs_closeargs arg;
2345 struct nfs_closeres res;
516a6af6 2346 struct nfs_fattr fattr;
26e976a8 2347 unsigned long timestamp;
f7e8917a
FI		 2348 bool roc;
2349 u32 roc_barrier;
1da177e4
LT		 2350};
2351
963d8fe5 2352static void nfs4_free_closedata(void *data)
9512135d 2353{
963d8fe5
TM		 2354 struct nfs4_closedata *calldata = data;
2355 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2356 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2357
f7e8917a
FI		 2358 if (calldata->roc)
2359 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2360 nfs4_put_open_state(calldata->state);
2361 nfs_free_seqid(calldata->arg.seqid);
9512135d 2362 nfs4_put_state_owner(sp);
322b2b90 2363 nfs_sb_deactive(sb);
9512135d
TM		 2364 kfree(calldata);
2365}
2366
88069f77
TM		 2367static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2368 fmode_t fmode)
2369{
2370 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2371 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2372 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2373 case FMODE_WRITE:
88069f77 2374 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2375 break;
2376 case FMODE_READ:
88069f77 2377 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2378 break;
2379 case 0:
2380 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2382 clear_bit(NFS_OPEN_STATE, &state->flags);
2383 }
88069f77
TM		 2384 spin_unlock(&state->owner->so_lock);
2385}
2386
963d8fe5 2387static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2388{
963d8fe5 2389 struct nfs4_closedata *calldata = data;
1da177e4 2390 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2391 struct nfs_server *server = NFS_SERVER(calldata->inode);
2392
a3ca5651 2393 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2394 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2395 return;
42113a75 2396 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2397 /* hmm. we are done with the inode, and in the process of freeing
2398 * the state_owner. we keep this around to process errors
2399 */
1da177e4
LT		 2400 switch (task->tk_status) {
2401 case 0:
f7e8917a
FI		 2402 if (calldata->roc)
2403 pnfs_roc_set_barrier(state->inode,
2404 calldata->roc_barrier);
45328c35 2405 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2406 renew_lease(server, calldata->timestamp);
88069f77
TM		 2407 nfs4_close_clear_stateid_flags(state,
2408 calldata->arg.fmode);
1da177e4
LT		 2409 break;
2410 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2411 case -NFS4ERR_OLD_STATEID:
2412 case -NFS4ERR_BAD_STATEID:
1da177e4 2413 case -NFS4ERR_EXPIRED:
dc0b027d 2414 if (calldata->arg.fmode == 0)
9e33bed5 2415 break;
1da177e4 2416 default:
72211dbe
TM		 2417 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2418 rpc_restart_call_prepare(task);
1da177e4 2419 }
72211dbe 2420 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2421 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2422 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2423}
2424
4ce70ada 2425static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2426{
4ce70ada 2427 struct nfs4_closedata *calldata = data;
9512135d 2428 struct nfs4_state *state = calldata->state;
7fdab069 2429 struct inode *inode = calldata->inode;
88069f77 2430 int call_close = 0;
9512135d 2431
a3ca5651 2432 dprintk("%s: begin!\n", __func__);
963d8fe5 2433 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2434 goto out_wait;
003707c7 2435
88069f77
TM		 2436 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2437 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2438 spin_lock(&state->owner->so_lock);
003707c7 2439 /* Calculate the change in open mode */
e7616923 2440 if (state->n_rdwr == 0) {
003707c7 2441 if (state->n_rdonly == 0) {
88069f77
TM		 2442 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2443 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2444 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2445 }
2446 if (state->n_wronly == 0) {
88069f77
TM		 2447 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2448 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2449 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2450 }
e7616923 2451 }
5d422301
TM		 2452 if (!nfs4_valid_open_stateid(state))
2453 call_close = 0;
4cecb76f 2454 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2455
2456 if (!call_close) {
963d8fe5 2457 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2458 goto out_no_action;
9512135d 2459 }
88069f77 2460
f7e8917a 2461 if (calldata->arg.fmode == 0) {
88069f77 2462 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2463 if (calldata->roc &&
b9536ad5
AA		 2464 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2465 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2466 goto out_wait;
b9536ad5 2467 }
f7e8917a 2468 }
88069f77 2469
516a6af6 2470 nfs_fattr_init(calldata->res.fattr);
26e976a8 2471 calldata->timestamp = jiffies;
7fdab069 2472 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2473 &calldata->arg.seq_args,
2474 &calldata->res.seq_res,
2240a9e2
TM		 2475 task) != 0)
2476 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2477 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2478 return;
2479out_no_action:
2480 task->tk_action = NULL;
2481out_wait:
2482 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2483}
2484
963d8fe5 2485static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2486 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2487 .rpc_call_done = nfs4_close_done,
2488 .rpc_release = nfs4_free_closedata,
2489};
2490
1da177e4
LT		 2491/*
2492 * It is possible for data to be read/written from a mem-mapped file
2493 * after the sys_close call (which hits the vfs layer as a flush).
2494 * This means that we can't safely call nfsv4 close on a file until
2495 * the inode is cleared. This in turn means that we are not good
2496 * NFSv4 citizens - we do not indicate to the server to update the file's
2497 * share state even when we are done with one of the three share
2498 * stateid's in the inode.
2499 *
2500 * NOTE: Caller must be holding the sp->so_owner semaphore!
2501 */
1f7977c1 2502int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2503{
4a35bd41 2504 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2505 struct nfs4_closedata *calldata;
b39e625b
TM		 2506 struct nfs4_state_owner *sp = state->owner;
2507 struct rpc_task *task;
5138fde0
TM		 2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2510 .rpc_cred = state->owner->so_cred,
2511 };
c970aa85
TM		 2512 struct rpc_task_setup task_setup_data = {
2513 .rpc_client = server->client,
5138fde0 2514 .rpc_message = &msg,
c970aa85 2515 .callback_ops = &nfs4_close_ops,
101070ca 2516 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2517 .flags = RPC_TASK_ASYNC,
2518 };
9512135d 2519 int status = -ENOMEM;
1da177e4 2520
8535b2be 2521 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2522 if (calldata == NULL)
9512135d 2523 goto out;
9d12b216 2524 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2525 calldata->inode = state->inode;
1da177e4 2526 calldata->state = state;
4a35bd41 2527 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2528 calldata->arg.stateid = &state->open_stateid;
1da177e4 2529 /* Serialization for the sequence id */
8535b2be 2530 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2531 if (calldata->arg.seqid == NULL)
2532 goto out_free_calldata;
dc0b027d 2533 calldata->arg.fmode = 0;
a65318bf 2534 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2535 calldata->res.fattr = &calldata->fattr;
c1d51931 2536 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2537 calldata->res.server = server;
1f7977c1 2538 calldata->roc = pnfs_roc(state->inode);
643168c2 2539 nfs_sb_active(calldata->inode->i_sb);
9512135d 2540
1174dd1f
TM		 2541 msg.rpc_argp = &calldata->arg;
2542 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2543 task_setup_data.callback_data = calldata;
2544 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2545 if (IS_ERR(task))
2546 return PTR_ERR(task);
a49c3c77
TM		 2547 status = 0;
2548 if (wait)
2549 status = rpc_wait_for_completion_task(task);
b39e625b 2550 rpc_put_task(task);
a49c3c77 2551 return status;
9512135d
TM		 2552out_free_calldata:
2553 kfree(calldata);
2554out:
b39e625b
TM		 2555 nfs4_put_open_state(state);
2556 nfs4_put_state_owner(sp);
9512135d 2557 return status;
1da177e4
LT		 2558}
2559
2b484297 2560static struct inode *
cd9a1c0e 2561nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2562{
1da177e4 2563 struct nfs4_state *state;
aa9c2669
DQ		 2564 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2565
2566 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2567
565277f6 2568 /* Protect against concurrent sillydeletes */
959d921f 2569 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2570
2571 nfs4_label_release_security(label);
2572
f46e0bd3
TM		 2573 if (IS_ERR(state))
2574 return ERR_CAST(state);
275bb307 2575 return state->inode;
1da177e4
LT		 2576}
2577
1185a552 2578static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2579{
2580 if (ctx->state == NULL)
2581 return;
2582 if (is_sync)
643168c2 2583 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2584 else
643168c2 2585 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2586}
1da177e4
LT		 2587
2588static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2589{
43652ad5
BH		 2590 struct nfs4_server_caps_arg args = {
2591 .fhandle = fhandle,
2592 };
1da177e4
LT		 2593 struct nfs4_server_caps_res res = {};
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2596 .rpc_argp = &args,
1da177e4
LT		 2597 .rpc_resp = &res,
2598 };
2599 int status;
2600
7c513058 2601 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2602 if (status == 0) {
2603 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2604 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2605 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2606 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2607 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2608 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2609 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2610 server->caps |= NFS_CAP_ACLS;
2611 if (res.has_links != 0)
2612 server->caps |= NFS_CAP_HARDLINKS;
2613 if (res.has_symlinks != 0)
2614 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2615 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2616 server->caps |= NFS_CAP_FILEID;
2617 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2618 server->caps |= NFS_CAP_MODE;
2619 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2620 server->caps |= NFS_CAP_NLINK;
2621 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2622 server->caps |= NFS_CAP_OWNER;
2623 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2624 server->caps |= NFS_CAP_OWNER_GROUP;
2625 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2626 server->caps |= NFS_CAP_ATIME;
2627 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2628 server->caps |= NFS_CAP_CTIME;
2629 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2630 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2631#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2632 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2633 server->caps |= NFS_CAP_SECURITY_LABEL;
2634#endif
2635 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2636 sizeof(server->attr_bitmask));
62ab460c 2637
aa9c2669
DQ		 2638 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2639 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2640 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2641 }
a65318bf
TM		 2642 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2643 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2644 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2645 server->acl_bitmask = res.acl_bitmask;
264e6351 2646 server->fh_expire_type = res.fh_expire_type;
1da177e4 2647 }
cccef3b9 2648
1da177e4
LT		 2649 return status;
2650}
2651
55a97593 2652int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2653{
2654 struct nfs4_exception exception = { };
2655 int err;
2656 do {
2657 err = nfs4_handle_exception(server,
2658 _nfs4_server_capabilities(server, fhandle),
2659 &exception);
2660 } while (exception.retry);
2661 return err;
2662}
2663
2664static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2665 struct nfs_fsinfo *info)
2666{
aa9c2669 2667 u32 bitmask[3];
1da177e4 2668 struct nfs4_lookup_root_arg args = {
aa9c2669 2669 .bitmask = bitmask,
1da177e4
LT		 2670 };
2671 struct nfs4_lookup_res res = {
2672 .server = server,
0e574af1 2673 .fattr = info->fattr,
1da177e4
LT		 2674 .fh = fhandle,
2675 };
2676 struct rpc_message msg = {
2677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2678 .rpc_argp = &args,
2679 .rpc_resp = &res,
2680 };
008f55d0 2681
aa9c2669
DQ		 2682 bitmask[0] = nfs4_fattr_bitmap[0];
2683 bitmask[1] = nfs4_fattr_bitmap[1];
2684 /*
2685 * Process the label in the upcoming getfattr
2686 */
2687 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2688
0e574af1 2689 nfs_fattr_init(info->fattr);
7c513058 2690 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2691}
2692
2693static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2694 struct nfs_fsinfo *info)
2695{
2696 struct nfs4_exception exception = { };
2697 int err;
2698 do {
fb8a5ba8
BS		 2699 err = _nfs4_lookup_root(server, fhandle, info);
2700 switch (err) {
2701 case 0:
2702 case -NFS4ERR_WRONGSEC:
05e9cfb4 2703 goto out;
fb8a5ba8
BS		 2704 default:
2705 err = nfs4_handle_exception(server, err, &exception);
2706 }
1da177e4 2707 } while (exception.retry);
05e9cfb4 2708out:
1da177e4
LT		 2709 return err;
2710}
2711
8f70e95f
BS		 2712static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2713 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2714{
2715 struct rpc_auth *auth;
2716 int ret;
2717
2718 auth = rpcauth_create(flavor, server->client);
e8d920c5 2719 if (IS_ERR(auth)) {
75bc8821 2720 ret = -EACCES;
8f70e95f
BS		 2721 goto out;
2722 }
2723 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2724out:
2725 return ret;
2726}
2727
9a744ba3
CL		 2728/*
2729 * Retry pseudoroot lookup with various security flavors. We do this when:
2730 *
2731 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2732 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2733 *
2734 * Returns zero on success, or a negative NFS4ERR value, or a
2735 * negative errno value.
2736 */
801a16dc 2737static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2738 struct nfs_fsinfo *info)
1da177e4 2739{
9a744ba3
CL		 2740 /* Per 3530bis 15.33.5 */
2741 static const rpc_authflavor_t flav_array[] = {
2742 RPC_AUTH_GSS_KRB5P,
2743 RPC_AUTH_GSS_KRB5I,
2744 RPC_AUTH_GSS_KRB5,
c4eafe11 2745 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2746 RPC_AUTH_NULL,
2747 };
2748 int status = -EPERM;
2749 size_t i;
6a1a1e34 2750
9a744ba3 2751 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2752 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2753 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2754 continue;
2755 break;
8f70e95f 2756 }
9a744ba3 2757
fb8a5ba8
BS		 2758 /*
2759 * -EACCESS could mean that the user doesn't have correct permissions
2760 * to access the mount. It could also mean that we tried to mount
2761 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2762 * existing mount programs don't handle -EACCES very well so it should
2763 * be mapped to -EPERM instead.
2764 */
2765 if (status == -EACCES)
2766 status = -EPERM;
801a16dc
BS		 2767 return status;
2768}
2769
2ed4b95b
CL		 2770static int nfs4_do_find_root_sec(struct nfs_server *server,
2771 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2772{
2773 int mv = server->nfs_client->cl_minorversion;
2774 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2775}
2776
2777/**
2778 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2779 * @server: initialized nfs_server handle
2780 * @fhandle: we fill in the pseudo-fs root file handle
2781 * @info: we fill in an FSINFO struct
2782 *
2783 * Returns zero on success, or a negative errno.
801a16dc 2784 */
3028eb2b
BS		 2785int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2786 struct nfs_fsinfo *info)
801a16dc 2787{
2ed4b95b
CL		 2788 int status;
2789
2790 status = nfs4_lookup_root(server, fhandle, info);
2791 if ((status == -NFS4ERR_WRONGSEC) &&
2792 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2793 status = nfs4_do_find_root_sec(server, fhandle, info);
2794
1da177e4
LT		 2795 if (status == 0)
2796 status = nfs4_server_capabilities(server, fhandle);
2797 if (status == 0)
2798 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2799
c12e87f4 2800 return nfs4_map_errors(status);
1da177e4
LT		 2801}
2802
bae36241
BS		 2803static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2804 struct nfs_fsinfo *info)
2805{
2806 int error;
2807 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2808 struct nfs4_label *label = NULL;
bae36241
BS		 2809
2810 error = nfs4_server_capabilities(server, mntfh);
2811 if (error < 0) {
2812 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2813 return error;
2814 }
2815
14c43f76
DQ		 2816 label = nfs4_label_alloc(server, GFP_KERNEL);
2817 if (IS_ERR(label))
2818 return PTR_ERR(label);
2819
1775fd3e 2820 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2821 if (error < 0) {
2822 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2823 goto err_free_label;
bae36241
BS		 2824 }
2825
2826 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2827 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2828 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2829
14c43f76
DQ		 2830err_free_label:
2831 nfs4_label_free(label);
2832
bae36241
BS		 2833 return error;
2834}
2835
6b97fd3d
MN		 2836/*
2837 * Get locations and (maybe) other attributes of a referral.
2838 * Note that we'll actually follow the referral later when
2839 * we detect fsid mismatch in inode revalidation
2840 */
f05d147f
BS		 2841static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2842 const struct qstr *name, struct nfs_fattr *fattr,
2843 struct nfs_fh *fhandle)
6b97fd3d
MN		 2844{
2845 int status = -ENOMEM;
2846 struct page *page = NULL;
2847 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2848
2849 page = alloc_page(GFP_KERNEL);
2850 if (page == NULL)
2851 goto out;
2852 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2853 if (locations == NULL)
2854 goto out;
2855
f05d147f 2856 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2857 if (status != 0)
2858 goto out;
2859 /* Make sure server returned a different fsid for the referral */
2860 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2861 dprintk("%s: server did not return a different fsid for"
2862 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2863 status = -EIO;
2864 goto out;
2865 }
533eb461
AA		 2866 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2867 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2868
533eb461 2869 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2870 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2871 memset(fhandle, 0, sizeof(struct nfs_fh));
2872out:
2873 if (page)
2874 __free_page(page);
5d7ca35a 2875 kfree(locations);
6b97fd3d
MN		 2876 return status;
2877}
2878
1775fd3e
DQ		 2879static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2881{
2882 struct nfs4_getattr_arg args = {
2883 .fh = fhandle,
2884 .bitmask = server->attr_bitmask,
2885 };
2886 struct nfs4_getattr_res res = {
2887 .fattr = fattr,
1775fd3e 2888 .label = label,
1da177e4
LT		 2889 .server = server,
2890 };
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2893 .rpc_argp = &args,
2894 .rpc_resp = &res,
2895 };
aa9c2669
DQ		 2896
2897 args.bitmask = nfs4_bitmask(server, label);
2898
0e574af1 2899 nfs_fattr_init(fattr);
7c513058 2900 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2901}
2902
1775fd3e
DQ		 2903static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2904 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2905{
2906 struct nfs4_exception exception = { };
2907 int err;
2908 do {
2909 err = nfs4_handle_exception(server,
1775fd3e 2910 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2911 &exception);
2912 } while (exception.retry);
2913 return err;
2914}
2915
2916/*
2917 * The file is not closed if it is opened due to the a request to change
2918 * the size of the file. The open call will not be needed once the
2919 * VFS layer lookup-intents are implemented.
2920 *
2921 * Close is called when the inode is destroyed.
2922 * If we haven't opened the file for O_WRONLY, we
2923 * need to in the size_change case to obtain a stateid.
2924 *
2925 * Got race?
2926 * Because OPEN is always done by name in nfsv4, it is
2927 * possible that we opened a different file by the same
2928 * name. We can recognize this race condition, but we
2929 * can't do anything about it besides returning an error.
2930 *
2931 * This will be fixed with VFS changes (lookup-intent).
2932 */
2933static int
2934nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2935 struct iattr *sattr)
2936{
08e9eac4 2937 struct inode *inode = dentry->d_inode;
659bfcd6 2938 struct rpc_cred *cred = NULL;
d530838b 2939 struct nfs4_state *state = NULL;
14c43f76 2940 struct nfs4_label *label = NULL;
1da177e4
LT		 2941 int status;
2942
8a1636c4 2943 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2944 pnfs_commit_and_return_layout(inode);
8a1636c4 2945
0e574af1 2946 nfs_fattr_init(fattr);
1da177e4 2947
2669940d
AA		 2948 /* Deal with open(O_TRUNC) */
2949 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2950 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2951
2952 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2953 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2954 return 0;
2955
d530838b 2956 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2957 if (sattr->ia_valid & ATTR_FILE) {
2958 struct nfs_open_context *ctx;
2959
2960 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2961 if (ctx) {
2962 cred = ctx->cred;
2963 state = ctx->state;
2964 }
659bfcd6 2965 }
08e9eac4 2966
14c43f76
DQ		 2967 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2968 if (IS_ERR(label))
2969 return PTR_ERR(label);
2970
2971 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2972 if (status == 0) {
65e4308d 2973 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2974 nfs_setsecurity(inode, fattr, label);
2975 }
14c43f76 2976 nfs4_label_free(label);
1da177e4
LT		 2977 return status;
2978}
2979
0c2e53f1
TM		 2980static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2981 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2982 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2983{
0c2e53f1 2984 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2985 int status;
2986 struct nfs4_lookup_arg args = {
2987 .bitmask = server->attr_bitmask,
0c2e53f1 2988 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2989 .name = name,
2990 };
2991 struct nfs4_lookup_res res = {
2992 .server = server,
2993 .fattr = fattr,
aa9c2669 2994 .label = label,
2b3de441
DH		 2995 .fh = fhandle,
2996 };
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2999 .rpc_argp = &args,
3000 .rpc_resp = &res,
3001 };
3002
aa9c2669
DQ		 3003 args.bitmask = nfs4_bitmask(server, label);
3004
2b3de441
DH		 3005 nfs_fattr_init(fattr);
3006
1da177e4 3007 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3008 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3009 dprintk("NFS reply lookup: %d\n", status);
3010 return status;
3011}
3012
72de53ec 3013static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3014{
7ebb9315 3015 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3016 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3017 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3018 fattr->nlink = 2;
3019}
3020
72de53ec
BS		 3021static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3022 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3023 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3024{
3025 struct nfs4_exception exception = { };
72de53ec 3026 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3027 int err;
3028 do {
1775fd3e 3029 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3030 trace_nfs4_lookup(dir, name, err);
72de53ec 3031 switch (err) {
08ef7bd3 3032 case -NFS4ERR_BADNAME:
72de53ec
BS		 3033 err = -ENOENT;
3034 goto out;
0c2e53f1 3035 case -NFS4ERR_MOVED:
f05d147f 3036 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3037 goto out;
0c2e53f1 3038 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3039 err = -EPERM;
3040 if (client != *clnt)
3041 goto out;
3042
3043 client = nfs4_create_sec_client(client, dir, name);
3044 if (IS_ERR(client))
3045 return PTR_ERR(client);
3046
3047 exception.retry = 1;
3048 break;
3049 default:
3050 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3051 }
1da177e4 3052 } while (exception.retry);
72de53ec
BS		 3053
3054out:
3055 if (err == 0)
3056 *clnt = client;
3057 else if (client != *clnt)
3058 rpc_shutdown_client(client);
3059
1da177e4
LT		 3060 return err;
3061}
3062
80a16b21 3063static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3064 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3065 struct nfs4_label *label)
72de53ec
BS		 3066{
3067 int status;
3068 struct rpc_clnt *client = NFS_CLIENT(dir);
3069
1775fd3e 3070 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3071 if (client != NFS_CLIENT(dir)) {
3072 rpc_shutdown_client(client);
3073 nfs_fixup_secinfo_attributes(fattr);
3074 }
3075 return status;
3076}
3077
f05d147f
BS		 3078struct rpc_clnt *
3079nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3080 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3081{
3082 int status;
3083 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3084
1775fd3e 3085 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3086 if (status < 0) {
3087 rpc_shutdown_client(client);
3088 return ERR_PTR(status);
3089 }
3090 return client;
3091}
3092
1da177e4
LT		 3093static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3094{
76b32999 3095 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3096 struct nfs4_accessargs args = {
3097 .fh = NFS_FH(inode),
a4980e78 3098 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3099 };
3100 struct nfs4_accessres res = {
3101 .server = server,
1da177e4 3102 };
1da177e4
LT		 3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3105 .rpc_argp = &args,
3106 .rpc_resp = &res,
3107 .rpc_cred = entry->cred,
3108 };
3109 int mode = entry->mask;
aa9c2669 3110 int status = 0;
1da177e4
LT		 3111
3112 /*
3113 * Determine which access bits we want to ask for...
3114 */
3115 if (mode & MAY_READ)
3116 args.access |= NFS4_ACCESS_READ;
3117 if (S_ISDIR(inode->i_mode)) {
3118 if (mode & MAY_WRITE)
3119 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3120 if (mode & MAY_EXEC)
3121 args.access |= NFS4_ACCESS_LOOKUP;
3122 } else {
3123 if (mode & MAY_WRITE)
3124 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3125 if (mode & MAY_EXEC)
3126 args.access |= NFS4_ACCESS_EXECUTE;
3127 }
c407d41a
TM		 3128
3129 res.fattr = nfs_alloc_fattr();
3130 if (res.fattr == NULL)
3131 return -ENOMEM;
3132
7c513058 3133 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3134 if (!status) {
6168f62c 3135 nfs_access_set_mask(entry, res.access);
c407d41a 3136 nfs_refresh_inode(inode, res.fattr);
1da177e4 3137 }
c407d41a 3138 nfs_free_fattr(res.fattr);
1da177e4
LT		 3139 return status;
3140}
3141
3142static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3143{
3144 struct nfs4_exception exception = { };
3145 int err;
3146 do {
c1578b76
TM		 3147 err = _nfs4_proc_access(inode, entry);
3148 trace_nfs4_access(inode, err);
3149 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3150 &exception);
3151 } while (exception.retry);
3152 return err;
3153}
3154
3155/*
3156 * TODO: For the time being, we don't try to get any attributes
3157 * along with any of the zero-copy operations READ, READDIR,
3158 * READLINK, WRITE.
3159 *
3160 * In the case of the first three, we want to put the GETATTR
3161 * after the read-type operation -- this is because it is hard
3162 * to predict the length of a GETATTR response in v4, and thus
3163 * align the READ data correctly. This means that the GETATTR
3164 * may end up partially falling into the page cache, and we should
3165 * shift it into the 'tail' of the xdr_buf before processing.
3166 * To do this efficiently, we need to know the total length
3167 * of data received, which doesn't seem to be available outside
3168 * of the RPC layer.
3169 *
3170 * In the case of WRITE, we also want to put the GETATTR after
3171 * the operation -- in this case because we want to make sure
140150db 3172 * we get the post-operation mtime and size.
1da177e4
LT		 3173 *
3174 * Both of these changes to the XDR layer would in fact be quite
3175 * minor, but I decided to leave them for a subsequent patch.
3176 */
3177static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3178 unsigned int pgbase, unsigned int pglen)
3179{
3180 struct nfs4_readlink args = {
3181 .fh = NFS_FH(inode),
3182 .pgbase = pgbase,
3183 .pglen = pglen,
3184 .pages = &page,
3185 };
f50c7000 3186 struct nfs4_readlink_res res;
1da177e4
LT		 3187 struct rpc_message msg = {
3188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3189 .rpc_argp = &args,
f50c7000 3190 .rpc_resp = &res,
1da177e4
LT		 3191 };
3192
7c513058 3193 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3194}
3195
3196static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3197 unsigned int pgbase, unsigned int pglen)
3198{
3199 struct nfs4_exception exception = { };
3200 int err;
3201 do {
c1578b76
TM		 3202 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3203 trace_nfs4_readlink(inode, err);
3204 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3205 &exception);
3206 } while (exception.retry);
3207 return err;
3208}
3209
1da177e4 3210/*
8867fe58 3211 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3212 */
1da177e4
LT		 3213static int
3214nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3215 int flags)
1da177e4 3216{
aa9c2669 3217 struct nfs4_label l, *ilabel = NULL;
8867fe58 3218 struct nfs_open_context *ctx;
1da177e4 3219 struct nfs4_state *state;
1da177e4
LT		 3220 int status = 0;
3221
8867fe58
MS		 3222 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3223 if (IS_ERR(ctx))
3224 return PTR_ERR(ctx);
3225
aa9c2669
DQ		 3226 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3227
a8a5da99 3228 sattr->ia_mode &= ~current_umask();
959d921f 3229 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3230 if (IS_ERR(state)) {
3231 status = PTR_ERR(state);
c0204fd2 3232 goto out;
1da177e4 3233 }
1da177e4 3234out:
aa9c2669 3235 nfs4_label_release_security(ilabel);
8867fe58 3236 put_nfs_open_context(ctx);
1da177e4
LT		 3237 return status;
3238}
3239
3240static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3241{
16e42959 3242 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3243 struct nfs_removeargs args = {
1da177e4 3244 .fh = NFS_FH(dir),
26fe5750 3245 .name = *name,
16e42959 3246 };
4fdc17b2 3247 struct nfs_removeres res = {
16e42959 3248 .server = server,
1da177e4 3249 };
1da177e4 3250 struct rpc_message msg = {
4fdc17b2
TM		 3251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3252 .rpc_argp = &args,
3253 .rpc_resp = &res,
1da177e4 3254 };
778d2817 3255 int status;
1da177e4 3256
7c513058 3257 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3258 if (status == 0)
16e42959 3259 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3260 return status;
3261}
3262
3263static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3264{
3265 struct nfs4_exception exception = { };
3266 int err;
3267 do {
078ea3df
TM		 3268 err = _nfs4_proc_remove(dir, name);
3269 trace_nfs4_remove(dir, name, err);
3270 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3271 &exception);
3272 } while (exception.retry);
3273 return err;
3274}
3275
e4eff1a6 3276static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3277{
e4eff1a6
TM		 3278 struct nfs_server *server = NFS_SERVER(dir);
3279 struct nfs_removeargs *args = msg->rpc_argp;
3280 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3281
e4eff1a6 3282 res->server = server;
1da177e4 3283 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3284 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3285
3286 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3287}
3288
34e137cc
BS		 3289static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3290{
d9afbd1b
TM		 3291 nfs4_setup_sequence(NFS_SERVER(data->dir),
3292 &data->args.seq_args,
3293 &data->res.seq_res,
3294 task);
1da177e4
LT		 3295}
3296
e4eff1a6 3297static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3298{
078ea3df
TM		 3299 struct nfs_unlinkdata *data = task->tk_calldata;
3300 struct nfs_removeres *res = &data->res;
e4eff1a6 3301
14516c3a
TM		 3302 if (!nfs4_sequence_done(task, &res->seq_res))
3303 return 0;
9e33bed5 3304 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3305 return 0;
3306 update_changeattr(dir, &res->cinfo);
e4eff1a6 3307 return 1;
1da177e4
LT		 3308}
3309
d3d4152a
JL		 3310static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3311{
3312 struct nfs_server *server = NFS_SERVER(dir);
3313 struct nfs_renameargs *arg = msg->rpc_argp;
3314 struct nfs_renameres *res = msg->rpc_resp;
3315
3316 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3317 res->server = server;
9d12b216 3318 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3319}
3320
c6bfa1a1
BS		 3321static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3322{
d9afbd1b
TM		 3323 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3324 &data->args.seq_args,
3325 &data->res.seq_res,
3326 task);
d3d4152a
JL		 3327}
3328
3329static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3330 struct inode *new_dir)
3331{
fbc6f7c2
TM		 3332 struct nfs_renamedata *data = task->tk_calldata;
3333 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3334
3335 if (!nfs4_sequence_done(task, &res->seq_res))
3336 return 0;
3337 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3338 return 0;
3339
3340 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3341 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3342 return 1;
3343}
3344
1da177e4
LT		 3345static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3346 struct inode *new_dir, struct qstr *new_name)
3347{
6caf2c82 3348 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3349 struct nfs_renameargs arg = {
1da177e4
LT		 3350 .old_dir = NFS_FH(old_dir),
3351 .new_dir = NFS_FH(new_dir),
3352 .old_name = old_name,
3353 .new_name = new_name,
6caf2c82 3354 };
e8582a8b 3355 struct nfs_renameres res = {
6caf2c82 3356 .server = server,
1da177e4 3357 };
1da177e4
LT		 3358 struct rpc_message msg = {
3359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3360 .rpc_argp = &arg,
3361 .rpc_resp = &res,
3362 };
011fff72 3363 int status = -ENOMEM;
14c43f76 3364
7c513058 3365 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3366 if (!status) {
3367 update_changeattr(old_dir, &res.old_cinfo);
3368 update_changeattr(new_dir, &res.new_cinfo);
3369 }
3370 return status;
3371}
3372
3373static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3374 struct inode *new_dir, struct qstr *new_name)
3375{
3376 struct nfs4_exception exception = { };
3377 int err;
3378 do {
fbc6f7c2
TM		 3379 err = _nfs4_proc_rename(old_dir, old_name,
3380 new_dir, new_name);
3381 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3382 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3383 &exception);
3384 } while (exception.retry);
3385 return err;
3386}
3387
3388static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3389{
91ba2eee 3390 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3391 struct nfs4_link_arg arg = {
3392 .fh = NFS_FH(inode),
3393 .dir_fh = NFS_FH(dir),
3394 .name = name,
91ba2eee
TM		 3395 .bitmask = server->attr_bitmask,
3396 };
91ba2eee
TM		 3397 struct nfs4_link_res res = {
3398 .server = server,
1775fd3e 3399 .label = NULL,
1da177e4 3400 };
1da177e4
LT		 3401 struct rpc_message msg = {
3402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3403 .rpc_argp = &arg,
91ba2eee 3404 .rpc_resp = &res,
1da177e4 3405 };
136f2627
TM		 3406 int status = -ENOMEM;
3407
3408 res.fattr = nfs_alloc_fattr();
778d2817 3409 if (res.fattr == NULL)
136f2627 3410 goto out;
1da177e4 3411
14c43f76
DQ		 3412 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3413 if (IS_ERR(res.label)) {
3414 status = PTR_ERR(res.label);
3415 goto out;
3416 }
aa9c2669 3417 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3418
7c513058 3419 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3420 if (!status) {
3421 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3422 status = nfs_post_op_update_inode(inode, res.fattr);
3423 if (!status)
3424 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3425 }
14c43f76
DQ		 3426
3427
3428 nfs4_label_free(res.label);
3429
136f2627 3430out:
136f2627 3431 nfs_free_fattr(res.fattr);
1da177e4
LT		 3432 return status;
3433}
3434
3435static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3436{
3437 struct nfs4_exception exception = { };
3438 int err;
3439 do {
3440 err = nfs4_handle_exception(NFS_SERVER(inode),
3441 _nfs4_proc_link(inode, dir, name),
3442 &exception);
3443 } while (exception.retry);
3444 return err;
3445}
3446
57dc9a57
TM		 3447struct nfs4_createdata {
3448 struct rpc_message msg;
3449 struct nfs4_create_arg arg;
3450 struct nfs4_create_res res;
3451 struct nfs_fh fh;
3452 struct nfs_fattr fattr;
1775fd3e 3453 struct nfs4_label *label;
57dc9a57
TM		 3454};
3455
3456static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3457 struct qstr *name, struct iattr *sattr, u32 ftype)
3458{
3459 struct nfs4_createdata *data;
3460
3461 data = kzalloc(sizeof(*data), GFP_KERNEL);
3462 if (data != NULL) {
3463 struct nfs_server *server = NFS_SERVER(dir);
3464
14c43f76
DQ		 3465 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3466 if (IS_ERR(data->label))
3467 goto out_free;
3468
57dc9a57
TM		 3469 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3470 data->msg.rpc_argp = &data->arg;
3471 data->msg.rpc_resp = &data->res;
3472 data->arg.dir_fh = NFS_FH(dir);
3473 data->arg.server = server;
3474 data->arg.name = name;
3475 data->arg.attrs = sattr;
3476 data->arg.ftype = ftype;
aa9c2669 3477 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3478 data->res.server = server;
3479 data->res.fh = &data->fh;
3480 data->res.fattr = &data->fattr;
1775fd3e 3481 data->res.label = data->label;
57dc9a57 3482 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3483 }
3484 return data;
14c43f76
DQ		 3485out_free:
3486 kfree(data);
3487 return NULL;
57dc9a57
TM		 3488}
3489
3490static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3491{
7c513058 3492 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3493 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3494 if (status == 0) {
3495 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3496 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3497 }
3498 return status;
3499}
3500
3501static void nfs4_free_createdata(struct nfs4_createdata *data)
3502{
14c43f76 3503 nfs4_label_free(data->label);
57dc9a57
TM		 3504 kfree(data);
3505}
3506
4f390c15 3507static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3508 struct page *page, unsigned int len, struct iattr *sattr,
3509 struct nfs4_label *label)
1da177e4 3510{
57dc9a57
TM		 3511 struct nfs4_createdata *data;
3512 int status = -ENAMETOOLONG;
1da177e4 3513
94a6d753 3514 if (len > NFS4_MAXPATHLEN)
57dc9a57 3515 goto out;
4f390c15 3516
57dc9a57
TM		 3517 status = -ENOMEM;
3518 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3519 if (data == NULL)
3520 goto out;
3521
3522 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3523 data->arg.u.symlink.pages = &page;
3524 data->arg.u.symlink.len = len;
1775fd3e 3525 data->arg.label = label;
1da177e4 3526
57dc9a57
TM		 3527 status = nfs4_do_create(dir, dentry, data);
3528
3529 nfs4_free_createdata(data);
3530out:
1da177e4
LT		 3531 return status;
3532}
3533
4f390c15 3534static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3535 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3536{
3537 struct nfs4_exception exception = { };
aa9c2669 3538 struct nfs4_label l, *label = NULL;
1da177e4 3539 int err;
aa9c2669
DQ		 3540
3541 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3542
1da177e4 3543 do {
078ea3df
TM		 3544 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3545 trace_nfs4_symlink(dir, &dentry->d_name, err);
3546 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3547 &exception);
3548 } while (exception.retry);
aa9c2669
DQ		 3549
3550 nfs4_label_release_security(label);
1da177e4
LT		 3551 return err;
3552}
3553
3554static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3555 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3556{
57dc9a57
TM		 3557 struct nfs4_createdata *data;
3558 int status = -ENOMEM;
1da177e4 3559
57dc9a57
TM		 3560 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3561 if (data == NULL)
3562 goto out;
3563
1775fd3e 3564 data->arg.label = label;
57dc9a57
TM		 3565 status = nfs4_do_create(dir, dentry, data);
3566
3567 nfs4_free_createdata(data);
3568out:
1da177e4
LT		 3569 return status;
3570}
3571
3572static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3573 struct iattr *sattr)
3574{
3575 struct nfs4_exception exception = { };
aa9c2669 3576 struct nfs4_label l, *label = NULL;
1da177e4 3577 int err;
a8a5da99 3578
aa9c2669
DQ		 3579 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3580
a8a5da99 3581 sattr->ia_mode &= ~current_umask();
1da177e4 3582 do {
078ea3df
TM		 3583 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3584 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3585 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3586 &exception);
3587 } while (exception.retry);
aa9c2669
DQ		 3588 nfs4_label_release_security(label);
3589
1da177e4
LT		 3590 return err;
3591}
3592
3593static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3594 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3595{
3596 struct inode *dir = dentry->d_inode;
3597 struct nfs4_readdir_arg args = {
3598 .fh = NFS_FH(dir),
56e4ebf8 3599 .pages = pages,
1da177e4
LT		 3600 .pgbase = 0,
3601 .count = count,
96d25e53 3602 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3603 .plus = plus,
1da177e4
LT		 3604 };
3605 struct nfs4_readdir_res res;
3606 struct rpc_message msg = {
3607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3608 .rpc_argp = &args,
3609 .rpc_resp = &res,
3610 .rpc_cred = cred,
3611 };
3612 int status;
3613
3110ff80 3614 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3615 dentry->d_parent->d_name.name,
3616 dentry->d_name.name,
3617 (unsigned long long)cookie);
c3f52af3 3618 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3619 res.pgbase = args.pgbase;
7c513058 3620 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3621 if (status >= 0) {
c3f52af3 3622 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3623 status += args.pgbase;
3624 }
c4812998
TM		 3625
3626 nfs_invalidate_atime(dir);
3627
3110ff80 3628 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3629 return status;
3630}
3631
3632static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3633 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3634{
3635 struct nfs4_exception exception = { };
3636 int err;
3637 do {
c1578b76
TM		 3638 err = _nfs4_proc_readdir(dentry, cred, cookie,
3639 pages, count, plus);
3640 trace_nfs4_readdir(dentry->d_inode, err);
3641 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3642 &exception);
3643 } while (exception.retry);
3644 return err;
3645}
3646
3647static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3648 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3649{
57dc9a57
TM		 3650 struct nfs4_createdata *data;
3651 int mode = sattr->ia_mode;
3652 int status = -ENOMEM;
1da177e4 3653
57dc9a57
TM		 3654 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3655 if (data == NULL)
3656 goto out;
3657
1da177e4 3658 if (S_ISFIFO(mode))
57dc9a57 3659 data->arg.ftype = NF4FIFO;
1da177e4 3660 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3661 data->arg.ftype = NF4BLK;
3662 data->arg.u.device.specdata1 = MAJOR(rdev);
3663 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3664 }
3665 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3666 data->arg.ftype = NF4CHR;
3667 data->arg.u.device.specdata1 = MAJOR(rdev);
3668 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3669 } else if (!S_ISSOCK(mode)) {
3670 status = -EINVAL;
3671 goto out_free;
1da177e4 3672 }
1775fd3e 3673
aa9c2669 3674 data->arg.label = label;
57dc9a57 3675 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3676out_free:
57dc9a57
TM		 3677 nfs4_free_createdata(data);
3678out:
1da177e4
LT		 3679 return status;
3680}
3681
3682static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3683 struct iattr *sattr, dev_t rdev)
3684{
3685 struct nfs4_exception exception = { };
aa9c2669 3686 struct nfs4_label l, *label = NULL;
1da177e4 3687 int err;
a8a5da99 3688
aa9c2669
DQ		 3689 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3690
a8a5da99 3691 sattr->ia_mode &= ~current_umask();
1da177e4 3692 do {
078ea3df
TM		 3693 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3694 trace_nfs4_mknod(dir, &dentry->d_name, err);
3695 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3696 &exception);
3697 } while (exception.retry);
aa9c2669
DQ		 3698
3699 nfs4_label_release_security(label);
3700
1da177e4
LT		 3701 return err;
3702}
3703
3704static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3705 struct nfs_fsstat *fsstat)
3706{
3707 struct nfs4_statfs_arg args = {
3708 .fh = fhandle,
3709 .bitmask = server->attr_bitmask,
3710 };
24ad148a
BH		 3711 struct nfs4_statfs_res res = {
3712 .fsstat = fsstat,
3713 };
1da177e4
LT		 3714 struct rpc_message msg = {
3715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3716 .rpc_argp = &args,
24ad148a 3717 .rpc_resp = &res,
1da177e4
LT		 3718 };
3719
0e574af1 3720 nfs_fattr_init(fsstat->fattr);
7c513058 3721 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3722}
3723
3724static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3725{
3726 struct nfs4_exception exception = { };
3727 int err;
3728 do {
3729 err = nfs4_handle_exception(server,
3730 _nfs4_proc_statfs(server, fhandle, fsstat),
3731 &exception);
3732 } while (exception.retry);
3733 return err;
3734}
3735
3736static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3737 struct nfs_fsinfo *fsinfo)
3738{
3739 struct nfs4_fsinfo_arg args = {
3740 .fh = fhandle,
3741 .bitmask = server->attr_bitmask,
3742 };
3dda5e43
BH		 3743 struct nfs4_fsinfo_res res = {
3744 .fsinfo = fsinfo,
3745 };
1da177e4
LT		 3746 struct rpc_message msg = {
3747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3748 .rpc_argp = &args,
3dda5e43 3749 .rpc_resp = &res,
1da177e4
LT		 3750 };
3751
7c513058 3752 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3753}
3754
3755static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3756{
3757 struct nfs4_exception exception = { };
83ca7f5a 3758 unsigned long now = jiffies;
1da177e4
LT		 3759 int err;
3760
3761 do {
83ca7f5a
CL		 3762 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3763 if (err == 0) {
3764 struct nfs_client *clp = server->nfs_client;
3765
3766 spin_lock(&clp->cl_lock);
3767 clp->cl_lease_time = fsinfo->lease_time * HZ;
3768 clp->cl_last_renewal = now;
3769 spin_unlock(&clp->cl_lock);
3770 break;
3771 }
3772 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3773 } while (exception.retry);
3774 return err;
3775}
3776
3777static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3778{
e38eb650
BS		 3779 int error;
3780
0e574af1 3781 nfs_fattr_init(fsinfo->fattr);
e38eb650 3782 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3783 if (error == 0) {
3784 /* block layout checks this! */
3785 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3786 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3787 }
e38eb650
BS		 3788
3789 return error;
1da177e4
LT		 3790}
3791
3792static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3793 struct nfs_pathconf *pathconf)
3794{
3795 struct nfs4_pathconf_arg args = {
3796 .fh = fhandle,
3797 .bitmask = server->attr_bitmask,
3798 };
d45b2989
BH		 3799 struct nfs4_pathconf_res res = {
3800 .pathconf = pathconf,
3801 };
1da177e4
LT		 3802 struct rpc_message msg = {
3803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3804 .rpc_argp = &args,
d45b2989 3805 .rpc_resp = &res,
1da177e4
LT		 3806 };
3807
3808 /* None of the pathconf attributes are mandatory to implement */
3809 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3810 memset(pathconf, 0, sizeof(*pathconf));
3811 return 0;
3812 }
3813
0e574af1 3814 nfs_fattr_init(pathconf->fattr);
7c513058 3815 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3816}
3817
3818static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3819 struct nfs_pathconf *pathconf)
3820{
3821 struct nfs4_exception exception = { };
3822 int err;
3823
3824 do {
3825 err = nfs4_handle_exception(server,
3826 _nfs4_proc_pathconf(server, fhandle, pathconf),
3827 &exception);
3828 } while (exception.retry);
3829 return err;
3830}
3831
5521abfd 3832int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3833 const struct nfs_open_context *ctx,
3834 const struct nfs_lock_context *l_ctx,
3835 fmode_t fmode)
3836{
3837 const struct nfs_lockowner *lockowner = NULL;
3838
3839 if (l_ctx != NULL)
3840 lockowner = &l_ctx->lockowner;
5521abfd 3841 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3842}
3843EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3844
5521abfd
TM		 3845static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3846 const struct nfs_open_context *ctx,
3847 const struct nfs_lock_context *l_ctx,
3848 fmode_t fmode)
3849{
3850 nfs4_stateid current_stateid;
3851
3852 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3853 return false;
3854 return nfs4_stateid_match(stateid, &current_stateid);
3855}
3856
3857static bool nfs4_error_stateid_expired(int err)
3858{
3859 switch (err) {
3860 case -NFS4ERR_DELEG_REVOKED:
3861 case -NFS4ERR_ADMIN_REVOKED:
3862 case -NFS4ERR_BAD_STATEID:
3863 case -NFS4ERR_STALE_STATEID:
3864 case -NFS4ERR_OLD_STATEID:
3865 case -NFS4ERR_OPENMODE:
3866 case -NFS4ERR_EXPIRED:
3867 return true;
3868 }
3869 return false;
3870}
3871
d20581aa
BH		 3872void __nfs4_read_done_cb(struct nfs_read_data *data)
3873{
cd841605 3874 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3875}
3876
cbdabc7f 3877static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3878{
cd841605 3879 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3880
9e33bed5 3881 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3882 rpc_restart_call_prepare(task);
ec06c096 3883 return -EAGAIN;
1da177e4 3884 }
8850df99 3885
d20581aa 3886 __nfs4_read_done_cb(data);
1da177e4 3887 if (task->tk_status > 0)
ec06c096
TM		 3888 renew_lease(server, data->timestamp);
3889 return 0;
1da177e4
LT		 3890}
3891
5521abfd
TM		 3892static bool nfs4_read_stateid_changed(struct rpc_task *task,
3893 struct nfs_readargs *args)
3894{
3895
3896 if (!nfs4_error_stateid_expired(task->tk_status) ||
3897 nfs4_stateid_is_current(&args->stateid,
3898 args->context,
3899 args->lock_context,
3900 FMODE_READ))
3901 return false;
3902 rpc_restart_call_prepare(task);
3903 return true;
3904}
3905
cbdabc7f
AA		 3906static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3907{
3908
3909 dprintk("--> %s\n", __func__);
3910
3911 if (!nfs4_sequence_done(task, &data->res.seq_res))
3912 return -EAGAIN;
5521abfd
TM		 3913 if (nfs4_read_stateid_changed(task, &data->args))
3914 return -EAGAIN;
d20581aa
BH		 3915 return data->read_done_cb ? data->read_done_cb(task, data) :
3916 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3917}
3918
bdc7f021 3919static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3920{
1da177e4 3921 data->timestamp = jiffies;
cbdabc7f 3922 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3923 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3924 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3925}
3926
ea7c3303
BS		 3927static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3928{
9b206149 3929 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3930 &data->args.seq_args,
3931 &data->res.seq_res,
9b206149
TM		 3932 task))
3933 return;
3934 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3935 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3936}
3937
b029bc9b 3938static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3939{
cd841605 3940 struct inode *inode = data->header->inode;
1da177e4 3941
9e33bed5 3942 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3943 rpc_restart_call_prepare(task);
788e7a89 3944 return -EAGAIN;
1da177e4 3945 }
4f9838c7 3946 if (task->tk_status >= 0) {
1da177e4 3947 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3948 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3949 }
788e7a89 3950 return 0;
1da177e4
LT		 3951}
3952
5521abfd
TM		 3953static bool nfs4_write_stateid_changed(struct rpc_task *task,
3954 struct nfs_writeargs *args)
3955{
3956
3957 if (!nfs4_error_stateid_expired(task->tk_status) ||
3958 nfs4_stateid_is_current(&args->stateid,
3959 args->context,
3960 args->lock_context,
3961 FMODE_WRITE))
3962 return false;
3963 rpc_restart_call_prepare(task);
3964 return true;
3965}
3966
b029bc9b
FI		 3967static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3968{
3969 if (!nfs4_sequence_done(task, &data->res.seq_res))
3970 return -EAGAIN;
5521abfd
TM		 3971 if (nfs4_write_stateid_changed(task, &data->args))
3972 return -EAGAIN;
d20581aa
BH		 3973 return data->write_done_cb ? data->write_done_cb(task, data) :
3974 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3975}
3976
5a37f851
TM		 3977static
3978bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3979{
5a37f851
TM		 3980 const struct nfs_pgio_header *hdr = data->header;
3981
3982 /* Don't request attributes for pNFS or O_DIRECT writes */
3983 if (data->ds_clp != NULL || hdr->dreq != NULL)
3984 return false;
3985 /* Otherwise, request attributes if and only if we don't hold
3986 * a delegation
3987 */
011e2a7f 3988 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3989}
a69aef14 3990
bdc7f021 3991static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3992{
cd841605 3993 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3994
5a37f851 3995 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3996 data->args.bitmask = NULL;
3997 data->res.fattr = NULL;
3998 } else
3999 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4000
b029bc9b
FI		 4001 if (!data->write_done_cb)
4002 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4003 data->res.server = server;
1da177e4
LT		 4004 data->timestamp = jiffies;
4005
bdc7f021 4006 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4007 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4008}
4009
c6cb80d0
BS		 4010static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4011{
9b206149 4012 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4013 &data->args.seq_args,
4014 &data->res.seq_res,
9b206149
TM		 4015 task))
4016 return;
4017 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4018 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4019}
4020
0b7c0153 4021static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4022{
d9afbd1b
TM		 4023 nfs4_setup_sequence(NFS_SERVER(data->inode),
4024 &data->args.seq_args,
4025 &data->res.seq_res,
4026 task);
1da177e4
LT		 4027}
4028
0b7c0153 4029static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4030{
1da177e4 4031 struct inode *inode = data->inode;
14516c3a 4032
9e33bed5 4033 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4034 rpc_restart_call_prepare(task);
788e7a89 4035 return -EAGAIN;
1da177e4 4036 }
788e7a89 4037 return 0;
1da177e4
LT		 4038}
4039
0b7c0153 4040static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4041{
4042 if (!nfs4_sequence_done(task, &data->res.seq_res))
4043 return -EAGAIN;
0b7c0153 4044 return data->commit_done_cb(task, data);
5f452431
FI		 4045}
4046
0b7c0153 4047static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4048{
788e7a89 4049 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4050
0b7c0153
FI		 4051 if (data->commit_done_cb == NULL)
4052 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4053 data->res.server = server;
bdc7f021 4054 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4055 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4056}
4057
9bc4e3ca
CL		 4058struct nfs4_renewdata {
4059 struct nfs_client *client;
4060 unsigned long timestamp;
4061};
4062
1da177e4
LT		 4063/*
4064 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4065 * standalone procedure for queueing an asynchronous RENEW.
4066 */
9bc4e3ca 4067static void nfs4_renew_release(void *calldata)
dc96aef9 4068{
9bc4e3ca
CL		 4069 struct nfs4_renewdata *data = calldata;
4070 struct nfs_client *clp = data->client;
dc96aef9 4071
0851de06
AB		 4072 if (atomic_read(&clp->cl_count) > 1)
4073 nfs4_schedule_state_renewal(clp);
4074 nfs_put_client(clp);
9bc4e3ca 4075 kfree(data);
dc96aef9
AB		 4076}
4077
9bc4e3ca 4078static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4079{
9bc4e3ca
CL		 4080 struct nfs4_renewdata *data = calldata;
4081 struct nfs_client *clp = data->client;
4082 unsigned long timestamp = data->timestamp;
1da177e4 4083
c6d01c6f 4084 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4085 if (task->tk_status < 0) {
95baa25c 4086 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4087 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4088 return;
4089 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4090 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4091 return;
4092 }
4093 nfs4_schedule_path_down_recovery(clp);
1da177e4 4094 }
452e9352 4095 do_renew_lease(clp, timestamp);
1da177e4
LT		 4096}
4097
963d8fe5
TM		 4098static const struct rpc_call_ops nfs4_renew_ops = {
4099 .rpc_call_done = nfs4_renew_done,
dc96aef9 4100 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4101};
4102
2f60ea6b 4103static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4104{
4105 struct rpc_message msg = {
4106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4107 .rpc_argp = clp,
b4454fe1 4108 .rpc_cred = cred,
1da177e4 4109 };
9bc4e3ca 4110 struct nfs4_renewdata *data;
1da177e4 4111
2f60ea6b
TM		 4112 if (renew_flags == 0)
4113 return 0;
0851de06
AB		 4114 if (!atomic_inc_not_zero(&clp->cl_count))
4115 return -EIO;
b569ad34 4116 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4117 if (data == NULL)
4118 return -ENOMEM;
4119 data->client = clp;
4120 data->timestamp = jiffies;
bc7a05ca 4121 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4122 &nfs4_renew_ops, data);
1da177e4
LT		 4123}
4124
8534d4ec 4125static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4126{
4127 struct rpc_message msg = {
4128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4129 .rpc_argp = clp,
b4454fe1 4130 .rpc_cred = cred,
1da177e4
LT		 4131 };
4132 unsigned long now = jiffies;
4133 int status;
4134
bc7a05ca 4135 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4136 if (status < 0)
4137 return status;
452e9352 4138 do_renew_lease(clp, now);
1da177e4
LT		 4139 return 0;
4140}
4141
aa1870af
BF		 4142static inline int nfs4_server_supports_acls(struct nfs_server *server)
4143{
4144 return (server->caps & NFS_CAP_ACLS)
4145 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4146 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4147}
4148
21f498c2
TM		 4149/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4150 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4151 * the stack.
4152 */
21f498c2 4153#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4154
e9e3d724
NH		 4155static int buf_to_pages_noslab(const void *buf, size_t buflen,
4156 struct page **pages, unsigned int *pgbase)
4157{
4158 struct page *newpage, **spages;
4159 int rc = 0;
4160 size_t len;
4161 spages = pages;
4162
4163 do {
21f498c2 4164 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4165 newpage = alloc_page(GFP_KERNEL);
4166
4167 if (newpage == NULL)
4168 goto unwind;
4169 memcpy(page_address(newpage), buf, len);
4170 buf += len;
4171 buflen -= len;
4172 *pages++ = newpage;
4173 rc++;
4174 } while (buflen != 0);
4175
4176 return rc;
4177
4178unwind:
4179 for(; rc > 0; rc--)
4180 __free_page(spages[rc-1]);
4181 return -ENOMEM;
4182}
4183
e50a1c2e
BF		 4184struct nfs4_cached_acl {
4185 int cached;
4186 size_t len;
3e9d4154 4187 char data[0];
e50a1c2e
BF		 4188};
4189
4190static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4191{
4192 struct nfs_inode *nfsi = NFS_I(inode);
4193
4194 spin_lock(&inode->i_lock);
4195 kfree(nfsi->nfs4_acl);
4196 nfsi->nfs4_acl = acl;
4197 spin_unlock(&inode->i_lock);
4198}
4199
4200static void nfs4_zap_acl_attr(struct inode *inode)
4201{
4202 nfs4_set_cached_acl(inode, NULL);
4203}
4204
4205static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4206{
4207 struct nfs_inode *nfsi = NFS_I(inode);
4208 struct nfs4_cached_acl *acl;
4209 int ret = -ENOENT;
4210
4211 spin_lock(&inode->i_lock);
4212 acl = nfsi->nfs4_acl;
4213 if (acl == NULL)
4214 goto out;
4215 if (buf == NULL) /* user is just asking for length */
4216 goto out_len;
4217 if (acl->cached == 0)
4218 goto out;
4219 ret = -ERANGE; /* see getxattr(2) man page */
4220 if (acl->len > buflen)
4221 goto out;
4222 memcpy(buf, acl->data, acl->len);
4223out_len:
4224 ret = acl->len;
4225out:
4226 spin_unlock(&inode->i_lock);
4227 return ret;
4228}
4229
5794d21e 4230static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4231{
4232 struct nfs4_cached_acl *acl;
b291f1b1 4233 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4234
1f1ea6c2 4235 if (buflen <= PAGE_SIZE) {
b291f1b1 4236 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4237 if (acl == NULL)
4238 goto out;
4239 acl->cached = 1;
5794d21e 4240 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4241 } else {
4242 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4243 if (acl == NULL)
4244 goto out;
4245 acl->cached = 0;
4246 }
4247 acl->len = acl_len;
4248out:
4249 nfs4_set_cached_acl(inode, acl);
4250}
4251
bf118a34
AA		 4252/*
4253 * The getxattr API returns the required buffer length when called with a
4254 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4255 * the required buf. On a NULL buf, we send a page of data to the server
4256 * guessing that the ACL request can be serviced by a page. If so, we cache
4257 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4258 * the cache. If not so, we throw away the page, and cache the required
4259 * length. The next getxattr call will then produce another round trip to
4260 * the server, this time with the input buf of the required size.
4261 */
16b4289c 4262static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4263{
bf118a34 4264 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4265 struct nfs_getaclargs args = {
4266 .fh = NFS_FH(inode),
4267 .acl_pages = pages,
4268 .acl_len = buflen,
4269 };
663c79b3
BH		 4270 struct nfs_getaclres res = {
4271 .acl_len = buflen,
4272 };
aa1870af
BF		 4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4275 .rpc_argp = &args,
663c79b3 4276 .rpc_resp = &res,
aa1870af 4277 };
21f498c2
TM		 4278 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4279 int ret = -ENOMEM, i;
aa1870af 4280
bf118a34
AA		 4281 /* As long as we're doing a round trip to the server anyway,
4282 * let's be prepared for a page of acl data. */
4283 if (npages == 0)
4284 npages = 1;
21f498c2
TM		 4285 if (npages > ARRAY_SIZE(pages))
4286 return -ERANGE;
5a006899 4287
bf118a34
AA		 4288 for (i = 0; i < npages; i++) {
4289 pages[i] = alloc_page(GFP_KERNEL);
4290 if (!pages[i])
4291 goto out_free;
e50a1c2e 4292 }
5a006899
SP		 4293
4294 /* for decoding across pages */
4295 res.acl_scratch = alloc_page(GFP_KERNEL);
4296 if (!res.acl_scratch)
4297 goto out_free;
4298
bf118a34
AA		 4299 args.acl_len = npages * PAGE_SIZE;
4300 args.acl_pgbase = 0;
5a006899 4301
de040bec 4302 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4303 __func__, buf, buflen, npages, args.acl_len);
4304 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4305 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4306 if (ret)
4307 goto out_free;
bf118a34 4308
1f1ea6c2
TM		 4309 /* Handle the case where the passed-in buffer is too short */
4310 if (res.acl_flags & NFS4_ACL_TRUNC) {
4311 /* Did the user only issue a request for the acl length? */
4312 if (buf == NULL)
4313 goto out_ok;
e50a1c2e 4314 ret = -ERANGE;
1f1ea6c2 4315 goto out_free;
e50a1c2e 4316 }
1f1ea6c2 4317 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4318 if (buf) {
4319 if (res.acl_len > buflen) {
4320 ret = -ERANGE;
4321 goto out_free;
4322 }
1f1ea6c2 4323 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4324 }
1f1ea6c2
TM		 4325out_ok:
4326 ret = res.acl_len;
e50a1c2e 4327out_free:
bf118a34
AA		 4328 for (i = 0; i < npages; i++)
4329 if (pages[i])
4330 __free_page(pages[i]);
331818f1
TM		 4331 if (res.acl_scratch)
4332 __free_page(res.acl_scratch);
aa1870af
BF		 4333 return ret;
4334}
4335
16b4289c
TM		 4336static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4337{
4338 struct nfs4_exception exception = { };
4339 ssize_t ret;
4340 do {
4341 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4342 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4343 if (ret >= 0)
4344 break;
4345 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4346 } while (exception.retry);
4347 return ret;
4348}
4349
e50a1c2e
BF		 4350static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4351{
4352 struct nfs_server *server = NFS_SERVER(inode);
4353 int ret;
4354
4355 if (!nfs4_server_supports_acls(server))
4356 return -EOPNOTSUPP;
4357 ret = nfs_revalidate_inode(server, inode);
4358 if (ret < 0)
4359 return ret;
08a22b39
AK		 4360 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4361 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4362 ret = nfs4_read_cached_acl(inode, buf, buflen);
4363 if (ret != -ENOENT)
bf118a34
AA		 4364 /* -ENOENT is returned if there is no ACL or if there is an ACL
4365 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4366 return ret;
4367 return nfs4_get_acl_uncached(inode, buf, buflen);
4368}
4369
16b4289c 4370static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4371{
4372 struct nfs_server *server = NFS_SERVER(inode);
4373 struct page *pages[NFS4ACL_MAXPAGES];
4374 struct nfs_setaclargs arg = {
4375 .fh = NFS_FH(inode),
4376 .acl_pages = pages,
4377 .acl_len = buflen,
4378 };
73c403a9 4379 struct nfs_setaclres res;
4b580ee3
BF		 4380 struct rpc_message msg = {
4381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4382 .rpc_argp = &arg,
73c403a9 4383 .rpc_resp = &res,
4b580ee3 4384 };
21f498c2 4385 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4386 int ret, i;
4b580ee3
BF		 4387
4388 if (!nfs4_server_supports_acls(server))
4389 return -EOPNOTSUPP;
21f498c2
TM		 4390 if (npages > ARRAY_SIZE(pages))
4391 return -ERANGE;
e9e3d724
NH		 4392 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4393 if (i < 0)
4394 return i;
57ec14c5 4395 nfs4_inode_return_delegation(inode);
7c513058 4396 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4397
4398 /*
4399 * Free each page after tx, so the only ref left is
4400 * held by the network stack
4401 */
4402 for (; i > 0; i--)
4403 put_page(pages[i-1]);
4404
08a22b39
AK		 4405 /*
4406 * Acl update can result in inode attribute update.
4407 * so mark the attribute cache invalid.
4408 */
4409 spin_lock(&inode->i_lock);
4410 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4411 spin_unlock(&inode->i_lock);
f41f7418
TM		 4412 nfs_access_zap_cache(inode);
4413 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4414 return ret;
4415}
4416
16b4289c
TM		 4417static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4418{
4419 struct nfs4_exception exception = { };
4420 int err;
4421 do {
c1578b76
TM		 4422 err = __nfs4_proc_set_acl(inode, buf, buflen);
4423 trace_nfs4_set_acl(inode, err);
4424 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4425 &exception);
4426 } while (exception.retry);
4427 return err;
4428}
4429
aa9c2669
DQ		 4430#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4431static int _nfs4_get_security_label(struct inode *inode, void *buf,
4432 size_t buflen)
4433{
4434 struct nfs_server *server = NFS_SERVER(inode);
4435 struct nfs_fattr fattr;
4436 struct nfs4_label label = {0, 0, buflen, buf};
4437
4438 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4439 struct nfs4_getattr_arg args = {
4440 .fh = NFS_FH(inode),
4441 .bitmask = bitmask,
4442 };
4443 struct nfs4_getattr_res res = {
4444 .fattr = &fattr,
4445 .label = &label,
4446 .server = server,
4447 };
4448 struct rpc_message msg = {
4449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4450 .rpc_argp = &args,
4451 .rpc_resp = &res,
4452 };
4453 int ret;
4454
4455 nfs_fattr_init(&fattr);
4456
4457 ret = rpc_call_sync(server->client, &msg, 0);
4458 if (ret)
4459 return ret;
4460 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4461 return -ENOENT;
4462 if (buflen < label.len)
4463 return -ERANGE;
4464 return 0;
4465}
4466
4467static int nfs4_get_security_label(struct inode *inode, void *buf,
4468 size_t buflen)
4469{
4470 struct nfs4_exception exception = { };
4471 int err;
4472
4473 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4474 return -EOPNOTSUPP;
4475
4476 do {
c1578b76
TM		 4477 err = _nfs4_get_security_label(inode, buf, buflen);
4478 trace_nfs4_get_security_label(inode, err);
4479 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4480 &exception);
4481 } while (exception.retry);
4482 return err;
4483}
4484
4485static int _nfs4_do_set_security_label(struct inode *inode,
4486 struct nfs4_label *ilabel,
4487 struct nfs_fattr *fattr,
4488 struct nfs4_label *olabel)
4489{
4490
4491 struct iattr sattr = {0};
4492 struct nfs_server *server = NFS_SERVER(inode);
4493 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4494 struct nfs_setattrargs args = {
4495 .fh = NFS_FH(inode),
4496 .iap = &sattr,
4497 .server = server,
4498 .bitmask = bitmask,
4499 .label = ilabel,
4500 };
4501 struct nfs_setattrres res = {
4502 .fattr = fattr,
4503 .label = olabel,
4504 .server = server,
4505 };
4506 struct rpc_message msg = {
4507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4508 .rpc_argp = &args,
4509 .rpc_resp = &res,
4510 };
4511 int status;
4512
4513 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4514
4515 status = rpc_call_sync(server->client, &msg, 0);
4516 if (status)
4517 dprintk("%s failed: %d\n", __func__, status);
4518
4519 return status;
4520}
4521
4522static int nfs4_do_set_security_label(struct inode *inode,
4523 struct nfs4_label *ilabel,
4524 struct nfs_fattr *fattr,
4525 struct nfs4_label *olabel)
4526{
4527 struct nfs4_exception exception = { };
4528 int err;
4529
4530 do {
c1578b76
TM		 4531 err = _nfs4_do_set_security_label(inode, ilabel,
4532 fattr, olabel);
4533 trace_nfs4_set_security_label(inode, err);
4534 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4535 &exception);
4536 } while (exception.retry);
4537 return err;
4538}
4539
4540static int
4541nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4542{
4543 struct nfs4_label ilabel, *olabel = NULL;
4544 struct nfs_fattr fattr;
4545 struct rpc_cred *cred;
4546 struct inode *inode = dentry->d_inode;
4547 int status;
4548
4549 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4550 return -EOPNOTSUPP;
4551
4552 nfs_fattr_init(&fattr);
4553
4554 ilabel.pi = 0;
4555 ilabel.lfs = 0;
4556 ilabel.label = (char *)buf;
4557 ilabel.len = buflen;
4558
4559 cred = rpc_lookup_cred();
4560 if (IS_ERR(cred))
4561 return PTR_ERR(cred);
4562
4563 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4564 if (IS_ERR(olabel)) {
4565 status = -PTR_ERR(olabel);
4566 goto out;
4567 }
4568
4569 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4570 if (status == 0)
4571 nfs_setsecurity(inode, &fattr, olabel);
4572
4573 nfs4_label_free(olabel);
4574out:
4575 put_rpccred(cred);
4576 return status;
4577}
4578#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4579
4580
1da177e4 4581static int
aa5190d0 4582nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4583{
aa5190d0
TM		 4584 struct nfs_client *clp = server->nfs_client;
4585
4586 if (task->tk_status >= 0)
1da177e4
LT		 4587 return 0;
4588 switch(task->tk_status) {
a1d0b5ee 4589 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4590 case -NFS4ERR_ADMIN_REVOKED:
4591 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4592 if (state == NULL)
4593 break;
4594 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4595 case -NFS4ERR_OPENMODE:
4596 if (state == NULL)
4597 break;
5d422301
TM		 4598 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4599 goto stateid_invalid;
0400a6b0 4600 goto wait_on_recovery;
0ced63d1 4601 case -NFS4ERR_EXPIRED:
5d422301
TM		 4602 if (state != NULL) {
4603 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4604 goto stateid_invalid;
4605 }
1da177e4 4606 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4607 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4608 nfs4_schedule_lease_recovery(clp);
4609 goto wait_on_recovery;
4745e315
AA		 4610#if defined(CONFIG_NFS_V4_1)
4611 case -NFS4ERR_BADSESSION:
4612 case -NFS4ERR_BADSLOT:
4613 case -NFS4ERR_BAD_HIGH_SLOT:
4614 case -NFS4ERR_DEADSESSION:
4615 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4616 case -NFS4ERR_SEQ_FALSE_RETRY:
4617 case -NFS4ERR_SEQ_MISORDERED:
4618 dprintk("%s ERROR %d, Reset session\n", __func__,
4619 task->tk_status);
9f594791 4620 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4621 task->tk_status = 0;
4622 return -EAGAIN;
4623#endif /* CONFIG_NFS_V4_1 */
1da177e4 4624 case -NFS4ERR_DELAY:
aa5190d0 4625 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4626 case -NFS4ERR_GRACE:
1da177e4
LT		 4627 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4628 task->tk_status = 0;
4629 return -EAGAIN;
a8a4ae3a 4630 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4631 case -NFS4ERR_OLD_STATEID:
4632 task->tk_status = 0;
4633 return -EAGAIN;
4634 }
4635 task->tk_status = nfs4_map_errors(task->tk_status);
4636 return 0;
5d422301
TM		 4637stateid_invalid:
4638 task->tk_status = -EIO;
4639 return 0;
0400a6b0 4640wait_on_recovery:
a2c0b9e2 4641 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4642 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4643 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4644 task->tk_status = 0;
4645 return -EAGAIN;
1da177e4
LT		 4646}
4647
f092075d
CL		 4648static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4649 nfs4_verifier *bootverf)
cd93710e
CL		 4650{
4651 __be32 verf[2];
4652
2c820d9a
CL		 4653 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4654 /* An impossible timestamp guarantees this value
4655 * will never match a generated boot time. */
4656 verf[0] = 0;
17f26b12 4657 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4658 } else {
f092075d 4659 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4660 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4661 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4662 }
cd93710e
CL		 4663 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4664}
4665
e984a55a
CL		 4666static unsigned int
4667nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4668 char *buf, size_t len)
4669{
4670 unsigned int result;
4671
4672 rcu_read_lock();
4673 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4674 clp->cl_ipaddr,
4675 rpc_peeraddr2str(clp->cl_rpcclient,
4676 RPC_DISPLAY_ADDR),
4677 rpc_peeraddr2str(clp->cl_rpcclient,
4678 RPC_DISPLAY_PROTO));
4679 rcu_read_unlock();
4680 return result;
4681}
4682
4683static unsigned int
4684nfs4_init_uniform_client_string(const struct nfs_client *clp,
4685 char *buf, size_t len)
4686{
55b59293 4687 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4688
4689 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4690 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4691 clp->rpc_ops->version,
4692 clp->cl_minorversion,
4693 nfs4_client_id_uniquifier,
4694 nodename);
e984a55a
CL		 4695 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4696 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4697 nodename);
e984a55a
CL		 4698}
4699
6bbb4ae8
CL		 4700/**
4701 * nfs4_proc_setclientid - Negotiate client ID
4702 * @clp: state data structure
4703 * @program: RPC program for NFSv4 callback service
4704 * @port: IP port number for NFS4 callback service
4705 * @cred: RPC credential to use for this call
4706 * @res: where to place the result
4707 *
4708 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4709 */
bb8b27e5
TM		 4710int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4711 unsigned short port, struct rpc_cred *cred,
4712 struct nfs4_setclientid_res *res)
1da177e4
LT		 4713{
4714 nfs4_verifier sc_verifier;
4715 struct nfs4_setclientid setclientid = {
4716 .sc_verifier = &sc_verifier,
4717 .sc_prog = program,
f4eecd5d 4718 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4719 };
4720 struct rpc_message msg = {
4721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4722 .rpc_argp = &setclientid,
bb8b27e5 4723 .rpc_resp = res,
286d7d6a 4724 .rpc_cred = cred,
1da177e4 4725 };
6bbb4ae8 4726 int status;
1da177e4 4727
de734831 4728 /* nfs_client_id4 */
f092075d 4729 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4730 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4731 setclientid.sc_name_len =
4732 nfs4_init_uniform_client_string(clp,
4733 setclientid.sc_name,
4734 sizeof(setclientid.sc_name));
4735 else
4736 setclientid.sc_name_len =
4737 nfs4_init_nonuniform_client_string(clp,
4738 setclientid.sc_name,
4739 sizeof(setclientid.sc_name));
de734831 4740 /* cb_client4 */
e984a55a 4741 rcu_read_lock();
de734831 4742 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4743 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4744 rpc_peeraddr2str(clp->cl_rpcclient,
4745 RPC_DISPLAY_NETID));
de734831
CL		 4746 rcu_read_unlock();
4747 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4748 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4749 clp->cl_ipaddr, port >> 8, port & 255);
4750
6bbb4ae8
CL		 4751 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4752 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4753 setclientid.sc_name_len, setclientid.sc_name);
4754 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4755 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4756 dprintk("NFS reply setclientid: %d\n", status);
4757 return status;
1da177e4
LT		 4758}
4759
6bbb4ae8
CL		 4760/**
4761 * nfs4_proc_setclientid_confirm - Confirm client ID
4762 * @clp: state data structure
4763 * @res: result of a previous SETCLIENTID
4764 * @cred: RPC credential to use for this call
4765 *
4766 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4767 */
fd954ae1 4768int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4769 struct nfs4_setclientid_res *arg,
4770 struct rpc_cred *cred)
1da177e4 4771{
1da177e4
LT		 4772 struct rpc_message msg = {
4773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4774 .rpc_argp = arg,
286d7d6a 4775 .rpc_cred = cred,
1da177e4 4776 };
1da177e4
LT		 4777 int status;
4778
6bbb4ae8
CL		 4779 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4780 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4781 clp->cl_clientid);
1bd714f2 4782 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4783 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4784 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4785 return status;
4786}
4787
fe650407
TM		 4788struct nfs4_delegreturndata {
4789 struct nfs4_delegreturnargs args;
fa178f29 4790 struct nfs4_delegreturnres res;
fe650407
TM		 4791 struct nfs_fh fh;
4792 nfs4_stateid stateid;
26e976a8 4793 unsigned long timestamp;
fa178f29 4794 struct nfs_fattr fattr;
fe650407
TM		 4795 int rpc_status;
4796};
4797
fe650407
TM		 4798static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4799{
4800 struct nfs4_delegreturndata *data = calldata;
938e1010 4801
14516c3a
TM		 4802 if (!nfs4_sequence_done(task, &data->res.seq_res))
4803 return;
938e1010 4804
ca8acf8d 4805 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4806 switch (task->tk_status) {
4807 case -NFS4ERR_STALE_STATEID:
4808 case -NFS4ERR_EXPIRED:
4809 case 0:
fa178f29 4810 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4811 break;
4812 default:
4813 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4814 -EAGAIN) {
d00c5d43 4815 rpc_restart_call_prepare(task);
79708861
RL		 4816 return;
4817 }
4818 }
4819 data->rpc_status = task->tk_status;
fe650407
TM		 4820}
4821
4822static void nfs4_delegreturn_release(void *calldata)
4823{
fe650407
TM		 4824 kfree(calldata);
4825}
4826
938e1010
AA		 4827#if defined(CONFIG_NFS_V4_1)
4828static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4829{
4830 struct nfs4_delegreturndata *d_data;
4831
4832 d_data = (struct nfs4_delegreturndata *)data;
4833
d9afbd1b
TM		 4834 nfs4_setup_sequence(d_data->res.server,
4835 &d_data->args.seq_args,
4836 &d_data->res.seq_res,
4837 task);
938e1010
AA		 4838}
4839#endif /* CONFIG_NFS_V4_1 */
4840
c8d149f3 4841static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4842#if defined(CONFIG_NFS_V4_1)
4843 .rpc_call_prepare = nfs4_delegreturn_prepare,
4844#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4845 .rpc_call_done = nfs4_delegreturn_done,
4846 .rpc_release = nfs4_delegreturn_release,
4847};
4848
e6f81075 4849static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4850{
4851 struct nfs4_delegreturndata *data;
fa178f29 4852 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4853 struct rpc_task *task;
5138fde0
TM		 4854 struct rpc_message msg = {
4855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4856 .rpc_cred = cred,
4857 };
c970aa85
TM		 4858 struct rpc_task_setup task_setup_data = {
4859 .rpc_client = server->client,
5138fde0 4860 .rpc_message = &msg,
c970aa85
TM		 4861 .callback_ops = &nfs4_delegreturn_ops,
4862 .flags = RPC_TASK_ASYNC,
4863 };
e6f81075 4864 int status = 0;
fe650407 4865
8535b2be 4866 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4867 if (data == NULL)
4868 return -ENOMEM;
9d12b216 4869 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4870 data->args.fhandle = &data->fh;
4871 data->args.stateid = &data->stateid;
9e907fec 4872 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4873 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4874 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4875 data->res.fattr = &data->fattr;
4876 data->res.server = server;
5138fde0 4877 nfs_fattr_init(data->res.fattr);
26e976a8 4878 data->timestamp = jiffies;
fe650407
TM		 4879 data->rpc_status = 0;
4880
c970aa85 4881 task_setup_data.callback_data = data;
1174dd1f
TM		 4882 msg.rpc_argp = &data->args;
4883 msg.rpc_resp = &data->res;
c970aa85 4884 task = rpc_run_task(&task_setup_data);
7a1218a2 4885 if (IS_ERR(task))
fe650407 4886 return PTR_ERR(task);
e6f81075
TM		 4887 if (!issync)
4888 goto out;
fe650407 4889 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4890 if (status != 0)
4891 goto out;
4892 status = data->rpc_status;
e144cbcc
TM		 4893 if (status == 0)
4894 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4895 else
4896 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4897out:
e6b3c4db 4898 rpc_put_task(task);
fe650407 4899 return status;
1da177e4
LT		 4900}
4901
e6f81075 4902int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4903{
4904 struct nfs_server *server = NFS_SERVER(inode);
4905 struct nfs4_exception exception = { };
4906 int err;
4907 do {
e6f81075 4908 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4909 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4910 switch (err) {
4911 case -NFS4ERR_STALE_STATEID:
4912 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4913 case 0:
4914 return 0;
4915 }
4916 err = nfs4_handle_exception(server, err, &exception);
4917 } while (exception.retry);
4918 return err;
4919}
4920
4921#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4922#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4923
4924/*
4925 * sleep, with exponential backoff, and retry the LOCK operation.
4926 */
4927static unsigned long
4928nfs4_set_lock_task_retry(unsigned long timeout)
4929{
416ad3c9 4930 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4931 timeout <<= 1;
4932 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4933 return NFS4_LOCK_MAXTIMEOUT;
4934 return timeout;
4935}
4936
1da177e4
LT		 4937static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4938{
4939 struct inode *inode = state->inode;
4940 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4941 struct nfs_client *clp = server->nfs_client;
911d1aaf 4942 struct nfs_lockt_args arg = {
1da177e4 4943 .fh = NFS_FH(inode),
911d1aaf 4944 .fl = request,
1da177e4 4945 };
911d1aaf
TM		 4946 struct nfs_lockt_res res = {
4947 .denied = request,
1da177e4
LT		 4948 };
4949 struct rpc_message msg = {
4950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4951 .rpc_argp = &arg,
4952 .rpc_resp = &res,
4953 .rpc_cred = state->owner->so_cred,
4954 };
1da177e4
LT		 4955 struct nfs4_lock_state *lsp;
4956 int status;
4957
911d1aaf 4958 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4959 status = nfs4_set_lock_state(state, request);
4960 if (status != 0)
4961 goto out;
4962 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4963 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4964 arg.lock_owner.s_dev = server->s_dev;
7c513058 4965 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4966 switch (status) {
4967 case 0:
4968 request->fl_type = F_UNLCK;
4969 break;
4970 case -NFS4ERR_DENIED:
4971 status = 0;
1da177e4 4972 }
70cc6487 4973 request->fl_ops->fl_release_private(request);
8d0a8a9d 4974out:
1da177e4
LT		 4975 return status;
4976}
4977
4978static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4979{
4980 struct nfs4_exception exception = { };
4981 int err;
4982
4983 do {
d1b748a5
TM		 4984 err = _nfs4_proc_getlk(state, cmd, request);
4985 trace_nfs4_get_lock(request, state, cmd, err);
4986 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 4987 &exception);
4988 } while (exception.retry);
4989 return err;
4990}
4991
4992static int do_vfs_lock(struct file *file, struct file_lock *fl)
4993{
4994 int res = 0;
4995 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4996 case FL_POSIX:
4997 res = posix_lock_file_wait(file, fl);
4998 break;
4999 case FL_FLOCK:
5000 res = flock_lock_file_wait(file, fl);
5001 break;
5002 default:
5003 BUG();
5004 }
1da177e4
LT		 5005 return res;
5006}
5007
faf5f49c 5008struct nfs4_unlockdata {
911d1aaf
TM		 5009 struct nfs_locku_args arg;
5010 struct nfs_locku_res res;
faf5f49c
TM		 5011 struct nfs4_lock_state *lsp;
5012 struct nfs_open_context *ctx;
911d1aaf
TM		 5013 struct file_lock fl;
5014 const struct nfs_server *server;
26e976a8 5015 unsigned long timestamp;
faf5f49c
TM		 5016};
5017
911d1aaf
TM		 5018static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5019 struct nfs_open_context *ctx,
5020 struct nfs4_lock_state *lsp,
5021 struct nfs_seqid *seqid)
5022{
5023 struct nfs4_unlockdata *p;
5024 struct inode *inode = lsp->ls_state->inode;
5025
8535b2be 5026 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5027 if (p == NULL)
5028 return NULL;
5029 p->arg.fh = NFS_FH(inode);
5030 p->arg.fl = &p->fl;
5031 p->arg.seqid = seqid;
c1d51931 5032 p->res.seqid = seqid;
911d1aaf
TM		 5033 p->arg.stateid = &lsp->ls_stateid;
5034 p->lsp = lsp;
5035 atomic_inc(&lsp->ls_count);
5036 /* Ensure we don't close file until we're done freeing locks! */
5037 p->ctx = get_nfs_open_context(ctx);
5038 memcpy(&p->fl, fl, sizeof(p->fl));
5039 p->server = NFS_SERVER(inode);
5040 return p;
5041}
5042
06f814a3 5043static void nfs4_locku_release_calldata(void *data)
faf5f49c 5044{
963d8fe5 5045 struct nfs4_unlockdata *calldata = data;
911d1aaf 5046 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5047 nfs4_put_lock_state(calldata->lsp);
5048 put_nfs_open_context(calldata->ctx);
5049 kfree(calldata);
faf5f49c
TM		 5050}
5051
963d8fe5 5052static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5053{
963d8fe5 5054 struct nfs4_unlockdata *calldata = data;
faf5f49c 5055
14516c3a
TM		 5056 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5057 return;
faf5f49c
TM		 5058 switch (task->tk_status) {
5059 case 0:
f597c537
TM		 5060 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5061 &calldata->res.stateid);
26e976a8 5062 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5063 break;
9e33bed5
TM		 5064 case -NFS4ERR_BAD_STATEID:
5065 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5066 case -NFS4ERR_STALE_STATEID:
5067 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5068 break;
5069 default:
9e33bed5 5070 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5071 rpc_restart_call_prepare(task);
faf5f49c 5072 }
2b1bc308 5073 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5074}
5075
4ce70ada 5076static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5077{
4ce70ada 5078 struct nfs4_unlockdata *calldata = data;
faf5f49c 5079
911d1aaf 5080 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5081 goto out_wait;
795a88c9 5082 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5083 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5084 goto out_no_action;
faf5f49c 5085 }
26e976a8 5086 calldata->timestamp = jiffies;
035168ab 5087 if (nfs4_setup_sequence(calldata->server,
a893693c 5088 &calldata->arg.seq_args,
2240a9e2
TM		 5089 &calldata->res.seq_res,
5090 task) != 0)
5091 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5092 return;
5093out_no_action:
5094 task->tk_action = NULL;
5095out_wait:
5096 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5097}
5098
963d8fe5 5099static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5100 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5101 .rpc_call_done = nfs4_locku_done,
06f814a3 5102 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5103};
5104
a5d16a4d
TM		 5105static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5106 struct nfs_open_context *ctx,
5107 struct nfs4_lock_state *lsp,
5108 struct nfs_seqid *seqid)
5109{
5110 struct nfs4_unlockdata *data;
5138fde0
TM		 5111 struct rpc_message msg = {
5112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5113 .rpc_cred = ctx->cred,
5114 };
c970aa85
TM		 5115 struct rpc_task_setup task_setup_data = {
5116 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5117 .rpc_message = &msg,
c970aa85 5118 .callback_ops = &nfs4_locku_ops,
101070ca 5119 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5120 .flags = RPC_TASK_ASYNC,
5121 };
a5d16a4d 5122
137d6aca
FF		 5123 /* Ensure this is an unlock - when canceling a lock, the
5124 * canceled lock is passed in, and it won't be an unlock.
5125 */
5126 fl->fl_type = F_UNLCK;
5127
a5d16a4d
TM		 5128 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5129 if (data == NULL) {
5130 nfs_free_seqid(seqid);
5131 return ERR_PTR(-ENOMEM);
5132 }
5133
9d12b216 5134 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5135 msg.rpc_argp = &data->arg;
5136 msg.rpc_resp = &data->res;
c970aa85
TM		 5137 task_setup_data.callback_data = data;
5138 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5139}
5140
faf5f49c
TM		 5141static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5142{
65b62a29
TM		 5143 struct inode *inode = state->inode;
5144 struct nfs4_state_owner *sp = state->owner;
5145 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5146 struct nfs_seqid *seqid;
1da177e4 5147 struct nfs4_lock_state *lsp;
06f814a3
TM		 5148 struct rpc_task *task;
5149 int status = 0;
536ff0f8 5150 unsigned char fl_flags = request->fl_flags;
faf5f49c 5151
8d0a8a9d 5152 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5153 /* Unlock _before_ we do the RPC call */
5154 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5155 /* Exclude nfs_delegation_claim_locks() */
5156 mutex_lock(&sp->so_delegreturn_mutex);
5157 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5158 down_read(&nfsi->rwsem);
5159 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5160 up_read(&nfsi->rwsem);
65b62a29 5161 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5162 goto out;
19e03c57
TM		 5163 }
5164 up_read(&nfsi->rwsem);
65b62a29 5165 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5166 if (status != 0)
9b073574
TM		 5167 goto out;
5168 /* Is this a delegated lock? */
8d0a8a9d 5169 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5170 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5171 goto out;
8535b2be 5172 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5173 status = -ENOMEM;
911d1aaf 5174 if (seqid == NULL)
9b073574 5175 goto out;
cd3758e3 5176 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5177 status = PTR_ERR(task);
5178 if (IS_ERR(task))
9b073574 5179 goto out;
a5d16a4d 5180 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5181 rpc_put_task(task);
9b073574 5182out:
536ff0f8 5183 request->fl_flags = fl_flags;
d1b748a5 5184 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5185 return status;
5186}
5187
a5d16a4d
TM		 5188struct nfs4_lockdata {
5189 struct nfs_lock_args arg;
5190 struct nfs_lock_res res;
5191 struct nfs4_lock_state *lsp;
5192 struct nfs_open_context *ctx;
5193 struct file_lock fl;
26e976a8 5194 unsigned long timestamp;
a5d16a4d
TM		 5195 int rpc_status;
5196 int cancelled;
66179efe 5197 struct nfs_server *server;
a5d16a4d
TM		 5198};
5199
5200static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5201 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5202 gfp_t gfp_mask)
1da177e4 5203{
a5d16a4d
TM		 5204 struct nfs4_lockdata *p;
5205 struct inode *inode = lsp->ls_state->inode;
1da177e4 5206 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5207
8535b2be 5208 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5209 if (p == NULL)
5210 return NULL;
5211
5212 p->arg.fh = NFS_FH(inode);
5213 p->arg.fl = &p->fl;
8535b2be 5214 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5215 if (p->arg.open_seqid == NULL)
5216 goto out_free;
8535b2be 5217 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5218 if (p->arg.lock_seqid == NULL)
2f74c0a0 5219 goto out_free_seqid;
a5d16a4d 5220 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5221 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5222 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5223 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5224 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5225 p->lsp = lsp;
66179efe 5226 p->server = server;
a5d16a4d
TM		 5227 atomic_inc(&lsp->ls_count);
5228 p->ctx = get_nfs_open_context(ctx);
5229 memcpy(&p->fl, fl, sizeof(p->fl));
5230 return p;
2f74c0a0
TM		 5231out_free_seqid:
5232 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5233out_free:
5234 kfree(p);
5235 return NULL;
5236}
5237
5238static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5239{
5240 struct nfs4_lockdata *data = calldata;
5241 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5242
3110ff80 5243 dprintk("%s: begin!\n", __func__);
2f74c0a0 5244 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5245 goto out_wait;
a5d16a4d
TM		 5246 /* Do we need to do an open_to_lock_owner? */
5247 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5248 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5249 goto out_release_lock_seqid;
8fe72bac 5250 }
8e472f33 5251 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5252 data->arg.new_lock_owner = 1;
c1d51931 5253 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5254 } else
5255 data->arg.new_lock_owner = 0;
5d422301
TM		 5256 if (!nfs4_valid_open_stateid(state)) {
5257 data->rpc_status = -EBADF;
5258 task->tk_action = NULL;
5259 goto out_release_open_seqid;
5260 }
26e976a8 5261 data->timestamp = jiffies;
035168ab
TM		 5262 if (nfs4_setup_sequence(data->server,
5263 &data->arg.seq_args,
2240a9e2 5264 &data->res.seq_res,
d9afbd1b 5265 task) == 0)
66179efe 5266 return;
5d422301 5267out_release_open_seqid:
2240a9e2
TM		 5268 nfs_release_seqid(data->arg.open_seqid);
5269out_release_lock_seqid:
5270 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5271out_wait:
5272 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5273 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5274}
5275
a5d16a4d
TM		 5276static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5277{
5278 struct nfs4_lockdata *data = calldata;
5279
3110ff80 5280 dprintk("%s: begin!\n", __func__);
a5d16a4d 5281
14516c3a
TM		 5282 if (!nfs4_sequence_done(task, &data->res.seq_res))
5283 return;
66179efe 5284
a5d16a4d 5285 data->rpc_status = task->tk_status;
a5d16a4d 5286 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5287 if (data->rpc_status == 0)
5288 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5289 else
5290 goto out;
5291 }
5292 if (data->rpc_status == 0) {
f597c537 5293 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5294 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5295 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5296 }
a5d16a4d 5297out:
3110ff80 5298 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5299}
5300
5301static void nfs4_lock_release(void *calldata)
5302{
5303 struct nfs4_lockdata *data = calldata;
5304
3110ff80 5305 dprintk("%s: begin!\n", __func__);
2f74c0a0 5306 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5307 if (data->cancelled != 0) {
5308 struct rpc_task *task;
5309 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5310 data->arg.lock_seqid);
5311 if (!IS_ERR(task))
bf294b41 5312 rpc_put_task_async(task);
3110ff80 5313 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5314 } else
5315 nfs_free_seqid(data->arg.lock_seqid);
5316 nfs4_put_lock_state(data->lsp);
5317 put_nfs_open_context(data->ctx);
5318 kfree(data);
3110ff80 5319 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5320}
5321
5322static const struct rpc_call_ops nfs4_lock_ops = {
5323 .rpc_call_prepare = nfs4_lock_prepare,
5324 .rpc_call_done = nfs4_lock_done,
5325 .rpc_release = nfs4_lock_release,
5326};
5327
2bee72a6
TM		 5328static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5329{
2bee72a6
TM		 5330 switch (error) {
5331 case -NFS4ERR_ADMIN_REVOKED:
5332 case -NFS4ERR_BAD_STATEID:
ecac799a 5333 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5334 if (new_lock_owner != 0 ||
795a88c9 5335 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5336 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5337 break;
5338 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5339 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5340 case -NFS4ERR_EXPIRED:
5341 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5342 };
5343}
5344
afe6c27c 5345static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5346{
5347 struct nfs4_lockdata *data;
5348 struct rpc_task *task;
5138fde0
TM		 5349 struct rpc_message msg = {
5350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5351 .rpc_cred = state->owner->so_cred,
5352 };
c970aa85
TM		 5353 struct rpc_task_setup task_setup_data = {
5354 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5355 .rpc_message = &msg,
c970aa85 5356 .callback_ops = &nfs4_lock_ops,
101070ca 5357 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5358 .flags = RPC_TASK_ASYNC,
5359 };
a5d16a4d
TM		 5360 int ret;
5361
3110ff80 5362 dprintk("%s: begin!\n", __func__);
cd3758e3 5363 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5364 fl->fl_u.nfs4_fl.owner,
5365 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5366 if (data == NULL)
5367 return -ENOMEM;
5368 if (IS_SETLKW(cmd))
5369 data->arg.block = 1;
9d12b216 5370 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5371 msg.rpc_argp = &data->arg;
5372 msg.rpc_resp = &data->res;
c970aa85 5373 task_setup_data.callback_data = data;
8fe72bac
TM		 5374 if (recovery_type > NFS_LOCK_NEW) {
5375 if (recovery_type == NFS_LOCK_RECLAIM)
5376 data->arg.reclaim = NFS_LOCK_RECLAIM;
5377 nfs4_set_sequence_privileged(&data->arg.seq_args);
5378 }
c970aa85 5379 task = rpc_run_task(&task_setup_data);
7a1218a2 5380 if (IS_ERR(task))
a5d16a4d 5381 return PTR_ERR(task);
a5d16a4d
TM		 5382 ret = nfs4_wait_for_completion_rpc_task(task);
5383 if (ret == 0) {
5384 ret = data->rpc_status;
2bee72a6
TM		 5385 if (ret)
5386 nfs4_handle_setlk_error(data->server, data->lsp,
5387 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5388 } else
5389 data->cancelled = 1;
e6b3c4db 5390 rpc_put_task(task);
3110ff80 5391 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5392 return ret;
1da177e4
LT		 5393}
5394
5395static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5396{
202b50dc 5397 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5398 struct nfs4_exception exception = {
5399 .inode = state->inode,
5400 };
202b50dc
TM		 5401 int err;
5402
5403 do {
42a2d13e
TM		 5404 /* Cache the lock if possible... */
5405 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5406 return 0;
afe6c27c 5407 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5408 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5409 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5410 break;
5411 nfs4_handle_exception(server, err, &exception);
5412 } while (exception.retry);
5413 return err;
1da177e4
LT		 5414}
5415
5416static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5417{
202b50dc 5418 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5419 struct nfs4_exception exception = {
5420 .inode = state->inode,
5421 };
202b50dc
TM		 5422 int err;
5423
6bfc93ef
TM		 5424 err = nfs4_set_lock_state(state, request);
5425 if (err != 0)
5426 return err;
202b50dc 5427 do {
42a2d13e
TM		 5428 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5429 return 0;
afe6c27c 5430 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5431 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5432 switch (err) {
5433 default:
5434 goto out;
5435 case -NFS4ERR_GRACE:
5436 case -NFS4ERR_DELAY:
5437 nfs4_handle_exception(server, err, &exception);
5438 err = 0;
5439 }
202b50dc 5440 } while (exception.retry);
a9ed2e25 5441out:
202b50dc 5442 return err;
1da177e4
LT		 5443}
5444
f062eb6c 5445#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5446/**
5447 * nfs41_check_expired_locks - possibly free a lock stateid
5448 *
5449 * @state: NFSv4 state for an inode
5450 *
5451 * Returns NFS_OK if recovery for this stateid is now finished.
5452 * Otherwise a negative NFS4ERR value is returned.
5453 */
b01dd1d8 5454static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5455{
eb64cf96 5456 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5457 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5458 struct nfs_server *server = NFS_SERVER(state->inode);
5459
b01dd1d8 5460 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5461 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5462 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5463
5464 status = nfs41_test_stateid(server,
5465 &lsp->ls_stateid,
5466 cred);
b01dd1d8 5467 if (status != NFS_OK) {
3e60ffdd
CL		 5468 /* Free the stateid unless the server
5469 * informs us the stateid is unrecognized. */
89af2739
CL		 5470 if (status != -NFS4ERR_BAD_STATEID)
5471 nfs41_free_stateid(server,
ab7cb0df
TM		 5472 &lsp->ls_stateid,
5473 cred);
795a88c9 5474 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5475 ret = status;
5476 }
5477 }
5478 };
5479
5480 return ret;
5481}
5482
5483static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5484{
5485 int status = NFS_OK;
5486
5487 if (test_bit(LK_STATE_IN_USE, &state->flags))
5488 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5489 if (status != NFS_OK)
5490 status = nfs4_lock_expired(state, request);
5491 return status;
f062eb6c
BS		 5492}
5493#endif
5494
1da177e4
LT		 5495static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5496{
9a99af49 5497 struct nfs4_state_owner *sp = state->owner;
19e03c57 5498 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5499 unsigned char fl_flags = request->fl_flags;
9a99af49 5500 unsigned int seq;
8e469ebd 5501 int status = -ENOLCK;
1da177e4 5502
8e469ebd
TM		 5503 if ((fl_flags & FL_POSIX) &&
5504 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5505 goto out;
6bfc93ef 5506 /* Is this a delegated open? */
6bfc93ef
TM		 5507 status = nfs4_set_lock_state(state, request);
5508 if (status != 0)
5509 goto out;
01c3b861
TM		 5510 request->fl_flags |= FL_ACCESS;
5511 status = do_vfs_lock(request->fl_file, request);
5512 if (status < 0)
5513 goto out;
19e03c57 5514 down_read(&nfsi->rwsem);
01c3b861 5515 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5516 /* Yes: cache locks! */
01c3b861 5517 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5518 request->fl_flags = fl_flags & ~FL_SLEEP;
5519 status = do_vfs_lock(request->fl_file, request);
5520 goto out_unlock;
01c3b861 5521 }
9a99af49
TM		 5522 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5523 up_read(&nfsi->rwsem);
afe6c27c 5524 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5525 if (status != 0)
9a99af49
TM		 5526 goto out;
5527 down_read(&nfsi->rwsem);
5528 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5529 status = -NFS4ERR_DELAY;
01c3b861 5530 goto out_unlock;
9a99af49 5531 }
6bfc93ef 5532 /* Note: we always want to sleep here! */
01c3b861 5533 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5534 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5535 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5536 "manager!\n", __func__);
01c3b861 5537out_unlock:
19e03c57 5538 up_read(&nfsi->rwsem);
01c3b861
TM		 5539out:
5540 request->fl_flags = fl_flags;
1da177e4
LT		 5541 return status;
5542}
5543
5544static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5545{
a1d0b5ee
TM		 5546 struct nfs4_exception exception = {
5547 .state = state,
05ffe24f 5548 .inode = state->inode,
a1d0b5ee 5549 };
1da177e4
LT		 5550 int err;
5551
5552 do {
965b5d67 5553 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5554 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5555 if (err == -NFS4ERR_DENIED)
5556 err = -EAGAIN;
1da177e4 5557 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5558 err, &exception);
1da177e4
LT		 5559 } while (exception.retry);
5560 return err;
5561}
5562
5563static int
5564nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5565{
5566 struct nfs_open_context *ctx;
5567 struct nfs4_state *state;
5568 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5569 int status;
5570
5571 /* verify open state */
cd3758e3 5572 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5573 state = ctx->state;
5574
5575 if (request->fl_start < 0 || request->fl_end < 0)
5576 return -EINVAL;
5577
d953126a
TM		 5578 if (IS_GETLK(cmd)) {
5579 if (state != NULL)
5580 return nfs4_proc_getlk(state, F_GETLK, request);
5581 return 0;
5582 }
1da177e4
LT		 5583
5584 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5585 return -EINVAL;
5586
d953126a
TM		 5587 if (request->fl_type == F_UNLCK) {
5588 if (state != NULL)
5589 return nfs4_proc_unlck(state, cmd, request);
5590 return 0;
5591 }
1da177e4 5592
d953126a
TM		 5593 if (state == NULL)
5594 return -ENOLCK;
55725513
TM		 5595 /*
5596 * Don't rely on the VFS having checked the file open mode,
5597 * since it won't do this for flock() locks.
5598 */
f44106e2 5599 switch (request->fl_type) {
55725513
TM		 5600 case F_RDLCK:
5601 if (!(filp->f_mode & FMODE_READ))
5602 return -EBADF;
5603 break;
5604 case F_WRLCK:
5605 if (!(filp->f_mode & FMODE_WRITE))
5606 return -EBADF;
5607 }
5608
1da177e4
LT		 5609 do {
5610 status = nfs4_proc_setlk(state, cmd, request);
5611 if ((status != -EAGAIN) || IS_SETLK(cmd))
5612 break;
5613 timeout = nfs4_set_lock_task_retry(timeout);
5614 status = -ERESTARTSYS;
5615 if (signalled())
5616 break;
5617 } while(status < 0);
1da177e4
LT		 5618 return status;
5619}
5620
db4f2e63 5621int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5622{
5623 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5624 int err;
5625
5626 err = nfs4_set_lock_state(state, fl);
5627 if (err != 0)
db4f2e63 5628 return err;
4a706fa0 5629 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5630 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5631}
6b3b5496 5632
cf470c3e
TM		 5633struct nfs_release_lockowner_data {
5634 struct nfs4_lock_state *lsp;
5ae67c4f 5635 struct nfs_server *server;
cf470c3e
TM		 5636 struct nfs_release_lockowner_args args;
5637};
5638
d3c7b7cc
TM		 5639static void nfs4_release_lockowner_release(void *calldata)
5640{
cf470c3e 5641 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5642 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5643 kfree(calldata);
5644}
5645
17280175 5646static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5647 .rpc_release = nfs4_release_lockowner_release,
5648};
5649
c8b2d0bf 5650static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5651{
cf470c3e 5652 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5653 struct rpc_message msg = {
5654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5655 };
5656
5657 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5658 return -EINVAL;
5659 data = kmalloc(sizeof(*data), GFP_NOFS);
5660 if (!data)
5661 return -ENOMEM;
5662 data->lsp = lsp;
5ae67c4f 5663 data->server = server;
cf470c3e
TM		 5664 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5665 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5666 data->args.lock_owner.s_dev = server->s_dev;
5667 msg.rpc_argp = &data->args;
5668 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5669 return 0;
d3c7b7cc
TM		 5670}
5671
aa1870af
BF		 5672#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5673
64c2ce8b
AK		 5674static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5675 const void *buf, size_t buflen,
5676 int flags, int type)
6b3b5496 5677{
64c2ce8b
AK		 5678 if (strcmp(key, "") != 0)
5679 return -EINVAL;
4b580ee3 5680
64c2ce8b 5681 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5682}
5683
64c2ce8b
AK		 5684static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5685 void *buf, size_t buflen, int type)
6b3b5496 5686{
64c2ce8b
AK		 5687 if (strcmp(key, "") != 0)
5688 return -EINVAL;
aa1870af 5689
64c2ce8b 5690 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5691}
5692
64c2ce8b
AK		 5693static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5694 size_t list_len, const char *name,
5695 size_t name_len, int type)
6b3b5496 5696{
64c2ce8b 5697 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5698
096455a2
BF		 5699 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5700 return 0;
64c2ce8b
AK		 5701
5702 if (list && len <= list_len)
5703 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5704 return len;
6b3b5496
BF		 5705}
5706
c9bccef6
DQ		 5707#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5708static inline int nfs4_server_supports_labels(struct nfs_server *server)
5709{
5710 return server->caps & NFS_CAP_SECURITY_LABEL;
5711}
5712
5713static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5714 const void *buf, size_t buflen,
5715 int flags, int type)
5716{
5717 if (security_ismaclabel(key))
5718 return nfs4_set_security_label(dentry, buf, buflen);
5719
5720 return -EOPNOTSUPP;
5721}
5722
5723static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5724 void *buf, size_t buflen, int type)
5725{
5726 if (security_ismaclabel(key))
5727 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5728 return -EOPNOTSUPP;
5729}
5730
5731static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5732 size_t list_len, const char *name,
5733 size_t name_len, int type)
5734{
5735 size_t len = 0;
5736
5737 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5738 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5739 if (list && len <= list_len)
5740 security_inode_listsecurity(dentry->d_inode, list, len);
5741 }
5742 return len;
5743}
5744
5745static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5746 .prefix = XATTR_SECURITY_PREFIX,
5747 .list = nfs4_xattr_list_nfs4_label,
5748 .get = nfs4_xattr_get_nfs4_label,
5749 .set = nfs4_xattr_set_nfs4_label,
5750};
5751#endif
5752
5753
533eb461
AA		 5754/*
5755 * nfs_fhget will use either the mounted_on_fileid or the fileid
5756 */
69aaaae1
TM		 5757static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5758{
533eb461
AA		 5759 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5760 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5761 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5762 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5763 return;
5764
5765 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5766 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5767 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5768 fattr->nlink = 2;
5769}
5770
f05d147f
BS		 5771static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5772 const struct qstr *name,
5773 struct nfs4_fs_locations *fs_locations,
5774 struct page *page)
683b57b4
TM		 5775{
5776 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5777 u32 bitmask[3] = {
361e624f 5778 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5779 };
5780 struct nfs4_fs_locations_arg args = {
5781 .dir_fh = NFS_FH(dir),
c228fd3a 5782 .name = name,
683b57b4
TM		 5783 .page = page,
5784 .bitmask = bitmask,
5785 };
22958463
BH		 5786 struct nfs4_fs_locations_res res = {
5787 .fs_locations = fs_locations,
5788 };
683b57b4
TM		 5789 struct rpc_message msg = {
5790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5791 .rpc_argp = &args,
22958463 5792 .rpc_resp = &res,
683b57b4
TM		 5793 };
5794 int status;
5795
3110ff80 5796 dprintk("%s: start\n", __func__);
533eb461
AA		 5797
5798 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5799 * is not supported */
5800 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5801 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5802 else
5803 bitmask[0] |= FATTR4_WORD0_FILEID;
5804
c228fd3a 5805 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5806 fs_locations->server = server;
830b8e33 5807 fs_locations->nlocations = 0;
f05d147f 5808 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5809 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5810 return status;
5811}
5812
f05d147f
BS		 5813int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5814 const struct qstr *name,
5815 struct nfs4_fs_locations *fs_locations,
5816 struct page *page)
db0a9593
BS		 5817{
5818 struct nfs4_exception exception = { };
5819 int err;
5820 do {
078ea3df
TM		 5821 err = _nfs4_proc_fs_locations(client, dir, name,
5822 fs_locations, page);
5823 trace_nfs4_get_fs_locations(dir, name, err);
5824 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5825 &exception);
5826 } while (exception.retry);
5827 return err;
5828}
5829
5ec16a85
AA		 5830/**
5831 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5832 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5833 */
5a5ea0d4
BS		 5834static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5835{
5836 int status;
5837 struct nfs4_secinfo_arg args = {
5838 .dir_fh = NFS_FH(dir),
5839 .name = name,
5840 };
5841 struct nfs4_secinfo_res res = {
5842 .flavors = flavors,
5843 };
5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5846 .rpc_argp = &args,
5847 .rpc_resp = &res,
5848 };
5ec16a85 5849 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5850
5851 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5852 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5853 dprintk("NFS reply secinfo: %d\n", status);
5854 return status;
5855}
5856
72de53ec
BS		 5857int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5858 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5859{
5860 struct nfs4_exception exception = { };
5861 int err;
5862 do {
078ea3df
TM		 5863 err = _nfs4_proc_secinfo(dir, name, flavors);
5864 trace_nfs4_secinfo(dir, name, err);
5865 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5866 &exception);
5867 } while (exception.retry);
5868 return err;
5869}
5870
557134a3 5871#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5872/*
5873 * Check the exchange flags returned by the server for invalid flags, having
5874 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5875 * DS flags set.
5876 */
5877static int nfs4_check_cl_exchange_flags(u32 flags)
5878{
5879 if (flags & ~EXCHGID4_FLAG_MASK_R)
5880 goto out_inval;
5881 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5882 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5883 goto out_inval;
5884 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5885 goto out_inval;
5886 return NFS_OK;
5887out_inval:
5888 return -NFS4ERR_INVAL;
5889}
5890
78fe0f41 5891static bool
79d4e1f0
CL		 5892nfs41_same_server_scope(struct nfs41_server_scope *a,
5893 struct nfs41_server_scope *b)
78fe0f41
WAA		 5894{
5895 if (a->server_scope_sz == b->server_scope_sz &&
5896 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5897 return true;
5898
5899 return false;
5900}
5901
7c44f1ae
WAA		 5902/*
5903 * nfs4_proc_bind_conn_to_session()
5904 *
5905 * The 4.1 client currently uses the same TCP connection for the
5906 * fore and backchannel.
5907 */
2cf047c9 5908int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5909{
5910 int status;
5911 struct nfs41_bind_conn_to_session_res res;
5912 struct rpc_message msg = {
5913 .rpc_proc =
5914 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5915 .rpc_argp = clp,
5916 .rpc_resp = &res,
2cf047c9 5917 .rpc_cred = cred,
7c44f1ae
WAA		 5918 };
5919
5920 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5921
5922 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5923 if (unlikely(res.session == NULL)) {
5924 status = -ENOMEM;
5925 goto out;
5926 }
5927
5928 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5929 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5930 if (status == 0) {
5931 if (memcmp(res.session->sess_id.data,
5932 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5933 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5934 status = -EIO;
5935 goto out_session;
5936 }
5937 if (res.dir != NFS4_CDFS4_BOTH) {
5938 dprintk("NFS: %s: Unexpected direction from server\n",
5939 __func__);
5940 status = -EIO;
5941 goto out_session;
5942 }
5943 if (res.use_conn_in_rdma_mode) {
5944 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5945 __func__);
5946 status = -EIO;
5947 goto out_session;
5948 }
5949 }
5950out_session:
5951 kfree(res.session);
5952out:
5953 dprintk("<-- %s status= %d\n", __func__, status);
5954 return status;
5955}
5956
99fe60d0
BH		 5957/*
5958 * nfs4_proc_exchange_id()
5959 *
6bbb4ae8
CL		 5960 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5961 *
99fe60d0
BH		 5962 * Since the clientid has expired, all compounds using sessions
5963 * associated with the stale clientid will be returning
5964 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5965 * be in some phase of session reset.
5966 */
4d643d1d 5967int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5968{
5969 nfs4_verifier verifier;
5970 struct nfs41_exchange_id_args args = {
cd93710e 5971 .verifier = &verifier,
99fe60d0 5972 .client = clp,
4f0b429d
TM		 5973 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5974 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5975 };
5976 struct nfs41_exchange_id_res res = {
32b01310 5977 0
99fe60d0
BH		 5978 };
5979 int status;
5980 struct rpc_message msg = {
5981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5982 .rpc_argp = &args,
5983 .rpc_resp = &res,
5984 .rpc_cred = cred,
5985 };
99fe60d0 5986
f092075d 5987 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5988 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5989 sizeof(args.id));
6bbb4ae8
CL		 5990 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5991 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5992 args.id_len, args.id);
99fe60d0 5993
acdeb69d 5994 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5995 GFP_NOFS);
acdeb69d 5996 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5997 status = -ENOMEM;
5998 goto out;
5999 }
78fe0f41 6000
79d4e1f0 6001 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6002 GFP_NOFS);
177313f1 6003 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6004 status = -ENOMEM;
acdeb69d 6005 goto out_server_owner;
abe9a6d5 6006 }
78fe0f41 6007
bbafffd2 6008 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6009 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6010 status = -ENOMEM;
6011 goto out_server_scope;
6012 }
6013
1bd714f2 6014 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6015 trace_nfs4_exchange_id(clp, status);
177313f1 6016 if (status == 0)
32b01310 6017 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6018
acdeb69d 6019 if (status == 0) {
32b01310
TM		 6020 clp->cl_clientid = res.clientid;
6021 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6022 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6023 clp->cl_seqid = res.seqid;
6024
acdeb69d
CL		 6025 kfree(clp->cl_serverowner);
6026 clp->cl_serverowner = res.server_owner;
6027 res.server_owner = NULL;
78fe0f41 6028
7d2ed9ac 6029 /* use the most recent implementation id */
59155546
CL		 6030 kfree(clp->cl_implid);
6031 clp->cl_implid = res.impl_id;
7d2ed9ac 6032
177313f1 6033 if (clp->cl_serverscope != NULL &&
79d4e1f0 6034 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6035 res.server_scope)) {
6036 dprintk("%s: server_scope mismatch detected\n",
6037 __func__);
6038 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6039 kfree(clp->cl_serverscope);
6040 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6041 }
6042
177313f1 6043 if (clp->cl_serverscope == NULL) {
79d4e1f0 6044 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6045 goto out;
6046 }
32b01310
TM		 6047 } else
6048 kfree(res.impl_id);
7d2ed9ac 6049
acdeb69d
CL		 6050out_server_owner:
6051 kfree(res.server_owner);
7d2ed9ac 6052out_server_scope:
abe9a6d5
WAA		 6053 kfree(res.server_scope);
6054out:
177313f1 6055 if (clp->cl_implid != NULL)
6bbb4ae8 6056 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6057 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6058 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6059 clp->cl_implid->date.seconds,
6060 clp->cl_implid->date.nseconds);
6bbb4ae8 6061 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6062 return status;
6063}
6064
66245539
TM		 6065static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6066 struct rpc_cred *cred)
6067{
6068 struct rpc_message msg = {
6069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6070 .rpc_argp = clp,
6071 .rpc_cred = cred,
6072 };
6073 int status;
6074
6075 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6076 trace_nfs4_destroy_clientid(clp, status);
66245539 6077 if (status)
02c67525 6078 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6079 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6080 return status;
6081}
6082
6083static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6084 struct rpc_cred *cred)
6085{
6086 unsigned int loop;
6087 int ret;
6088
6089 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6090 ret = _nfs4_proc_destroy_clientid(clp, cred);
6091 switch (ret) {
6092 case -NFS4ERR_DELAY:
6093 case -NFS4ERR_CLIENTID_BUSY:
6094 ssleep(1);
6095 break;
6096 default:
6097 return ret;
6098 }
6099 }
6100 return 0;
6101}
6102
6103int nfs4_destroy_clientid(struct nfs_client *clp)
6104{
6105 struct rpc_cred *cred;
6106 int ret = 0;
6107
6108 if (clp->cl_mvops->minor_version < 1)
6109 goto out;
6110 if (clp->cl_exchange_flags == 0)
6111 goto out;
05f4c350
CL		 6112 if (clp->cl_preserve_clid)
6113 goto out;
73d8bde5 6114 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6115 ret = nfs4_proc_destroy_clientid(clp, cred);
6116 if (cred)
6117 put_rpccred(cred);
6118 switch (ret) {
6119 case 0:
6120 case -NFS4ERR_STALE_CLIENTID:
6121 clp->cl_exchange_flags = 0;
6122 }
6123out:
6124 return ret;
6125}
6126
2050f0cc
AA		 6127struct nfs4_get_lease_time_data {
6128 struct nfs4_get_lease_time_args *args;
6129 struct nfs4_get_lease_time_res *res;
6130 struct nfs_client *clp;
6131};
6132
6133static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6134 void *calldata)
6135{
2050f0cc
AA		 6136 struct nfs4_get_lease_time_data *data =
6137 (struct nfs4_get_lease_time_data *)calldata;
6138
6139 dprintk("--> %s\n", __func__);
6140 /* just setup sequence, do not trigger session recovery
6141 since we're invoked within one */
d9afbd1b
TM		 6142 nfs41_setup_sequence(data->clp->cl_session,
6143 &data->args->la_seq_args,
6144 &data->res->lr_seq_res,
6145 task);
2050f0cc
AA		 6146 dprintk("<-- %s\n", __func__);
6147}
6148
6149/*
6150 * Called from nfs4_state_manager thread for session setup, so don't recover
6151 * from sequence operation or clientid errors.
6152 */
6153static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6154{
6155 struct nfs4_get_lease_time_data *data =
6156 (struct nfs4_get_lease_time_data *)calldata;
6157
6158 dprintk("--> %s\n", __func__);
14516c3a
TM		 6159 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6160 return;
2050f0cc
AA		 6161 switch (task->tk_status) {
6162 case -NFS4ERR_DELAY:
6163 case -NFS4ERR_GRACE:
6164 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6165 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6166 task->tk_status = 0;
a8a4ae3a
AA		 6167 /* fall through */
6168 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6169 rpc_restart_call_prepare(task);
2050f0cc
AA		 6170 return;
6171 }
2050f0cc
AA		 6172 dprintk("<-- %s\n", __func__);
6173}
6174
17280175 6175static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6176 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6177 .rpc_call_done = nfs4_get_lease_time_done,
6178};
6179
6180int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6181{
6182 struct rpc_task *task;
6183 struct nfs4_get_lease_time_args args;
6184 struct nfs4_get_lease_time_res res = {
6185 .lr_fsinfo = fsinfo,
6186 };
6187 struct nfs4_get_lease_time_data data = {
6188 .args = &args,
6189 .res = &res,
6190 .clp = clp,
6191 };
6192 struct rpc_message msg = {
6193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6194 .rpc_argp = &args,
6195 .rpc_resp = &res,
6196 };
6197 struct rpc_task_setup task_setup = {
6198 .rpc_client = clp->cl_rpcclient,
6199 .rpc_message = &msg,
6200 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6201 .callback_data = &data,
6202 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6203 };
6204 int status;
6205
9d12b216 6206 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6207 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6208 dprintk("--> %s\n", __func__);
6209 task = rpc_run_task(&task_setup);
6210
6211 if (IS_ERR(task))
6212 status = PTR_ERR(task);
6213 else {
6214 status = task->tk_status;
6215 rpc_put_task(task);
6216 }
6217 dprintk("<-- %s return %d\n", __func__, status);
6218
6219 return status;
6220}
6221
fc931582
AA		 6222/*
6223 * Initialize the values to be used by the client in CREATE_SESSION
6224 * If nfs4_init_session set the fore channel request and response sizes,
6225 * use them.
6226 *
6227 * Set the back channel max_resp_sz_cached to zero to force the client to
6228 * always set csa_cachethis to FALSE because the current implementation
6229 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6230 */
6231static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6232{
18aad3d5
AA		 6233 unsigned int max_rqst_sz, max_resp_sz;
6234
6235 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6236 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6237
fc931582 6238 /* Fore channel attributes */
18aad3d5
AA		 6239 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6240 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6241 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6242 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6243
6244 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6245 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6246 __func__,
6247 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6248 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6249
6250 /* Back channel attributes */
fc931582
AA		 6251 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6252 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6253 args->bc_attrs.max_resp_sz_cached = 0;
6254 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6255 args->bc_attrs.max_reqs = 1;
6256
6257 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6258 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6259 __func__,
6260 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6261 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6262 args->bc_attrs.max_reqs);
6263}
6264
43c2e885 6265static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6266{
43c2e885
BF		 6267 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6268 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6269
43c2e885
BF		 6270 if (rcvd->max_resp_sz > sent->max_resp_sz)
6271 return -EINVAL;
6272 /*
6273 * Our requested max_ops is the minimum we need; we're not
6274 * prepared to break up compounds into smaller pieces than that.
6275 * So, no point even trying to continue if the server won't
6276 * cooperate:
6277 */
6278 if (rcvd->max_ops < sent->max_ops)
6279 return -EINVAL;
6280 if (rcvd->max_reqs == 0)
6281 return -EINVAL;
b4b9a0c1
VG		 6282 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6283 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6284 return 0;
8d35301d
AA		 6285}
6286
43c2e885
BF		 6287static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6288{
6289 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6290 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6291
43c2e885
BF		 6292 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6293 return -EINVAL;
6294 if (rcvd->max_resp_sz < sent->max_resp_sz)
6295 return -EINVAL;
6296 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6297 return -EINVAL;
6298 /* These would render the backchannel useless: */
b4b9a0c1 6299 if (rcvd->max_ops != sent->max_ops)
43c2e885 6300 return -EINVAL;
b4b9a0c1 6301 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6302 return -EINVAL;
6303 return 0;
6304}
8d35301d 6305
8d35301d
AA		 6306static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6307 struct nfs4_session *session)
6308{
43c2e885 6309 int ret;
8d35301d 6310
43c2e885
BF		 6311 ret = nfs4_verify_fore_channel_attrs(args, session);
6312 if (ret)
6313 return ret;
6314 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6315}
6316
848f5bda
TM		 6317static int _nfs4_proc_create_session(struct nfs_client *clp,
6318 struct rpc_cred *cred)
fc931582
AA		 6319{
6320 struct nfs4_session *session = clp->cl_session;
6321 struct nfs41_create_session_args args = {
6322 .client = clp,
6323 .cb_program = NFS4_CALLBACK,
6324 };
6325 struct nfs41_create_session_res res = {
6326 .client = clp,
6327 };
6328 struct rpc_message msg = {
6329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6330 .rpc_argp = &args,
6331 .rpc_resp = &res,
848f5bda 6332 .rpc_cred = cred,
fc931582
AA		 6333 };
6334 int status;
6335
6336 nfs4_init_channel_attrs(&args);
0f91421e 6337 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6338
1bd714f2 6339 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6340 trace_nfs4_create_session(clp, status);
fc931582 6341
43095d39 6342 if (!status) {
8d35301d
AA		 6343 /* Verify the session's negotiated channel_attrs values */
6344 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6345 /* Increment the clientid slot sequence id */
6346 clp->cl_seqid++;
6347 }
6348
6349 return status;
6350}
6351
6352/*
6353 * Issues a CREATE_SESSION operation to the server.
6354 * It is the responsibility of the caller to verify the session is
6355 * expired before calling this routine.
6356 */
848f5bda 6357int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6358{
6359 int status;
6360 unsigned *ptr;
fc931582
AA		 6361 struct nfs4_session *session = clp->cl_session;
6362
6363 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6364
848f5bda 6365 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6366 if (status)
6367 goto out;
6368
aacd5537
AA		 6369 /* Init or reset the session slot tables */
6370 status = nfs4_setup_session_slot_tables(session);
6371 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6372 if (status)
6373 goto out;
6374
6375 ptr = (unsigned *)&session->sess_id.data[0];
6376 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6377 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6378out:
6379 dprintk("<-- %s\n", __func__);
6380 return status;
6381}
6382
0f3e66c6
AA		 6383/*
6384 * Issue the over-the-wire RPC DESTROY_SESSION.
6385 * The caller must serialize access to this routine.
6386 */
848f5bda
TM		 6387int nfs4_proc_destroy_session(struct nfs4_session *session,
6388 struct rpc_cred *cred)
0f3e66c6 6389{
848f5bda
TM		 6390 struct rpc_message msg = {
6391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6392 .rpc_argp = session,
6393 .rpc_cred = cred,
6394 };
0f3e66c6 6395 int status = 0;
0f3e66c6
AA		 6396
6397 dprintk("--> nfs4_proc_destroy_session\n");
6398
6399 /* session is still being setup */
6400 if (session->clp->cl_cons_state != NFS_CS_READY)
6401 return status;
6402
1bd714f2 6403 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6404 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6405
6406 if (status)
08106ac7 6407 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6408 "Session has been destroyed regardless...\n", status);
6409
6410 dprintk("<-- nfs4_proc_destroy_session\n");
6411 return status;
6412}
6413
fc01cea9
AA		 6414/*
6415 * Renew the cl_session lease.
6416 */
d5f8d3fe
TM		 6417struct nfs4_sequence_data {
6418 struct nfs_client *clp;
6419 struct nfs4_sequence_args args;
6420 struct nfs4_sequence_res res;
6421};
6422
dc96aef9
AB		 6423static void nfs41_sequence_release(void *data)
6424{
d5f8d3fe
TM		 6425 struct nfs4_sequence_data *calldata = data;
6426 struct nfs_client *clp = calldata->clp;
dc96aef9 6427
7135840f
AB		 6428 if (atomic_read(&clp->cl_count) > 1)
6429 nfs4_schedule_state_renewal(clp);
6430 nfs_put_client(clp);
d5f8d3fe 6431 kfree(calldata);
dc96aef9
AB		 6432}
6433
aa5190d0
TM		 6434static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6435{
6436 switch(task->tk_status) {
6437 case -NFS4ERR_DELAY:
aa5190d0
TM		 6438 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6439 return -EAGAIN;
6440 default:
0400a6b0 6441 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6442 }
6443 return 0;
6444}
6445
dc96aef9 6446static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6447{
d5f8d3fe
TM		 6448 struct nfs4_sequence_data *calldata = data;
6449 struct nfs_client *clp = calldata->clp;
fc01cea9 6450
14516c3a
TM		 6451 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6452 return;
fc01cea9 6453
c6d01c6f 6454 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6455 if (task->tk_status < 0) {
6456 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6457 if (atomic_read(&clp->cl_count) == 1)
6458 goto out;
fc01cea9 6459
aa5190d0
TM		 6460 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6461 rpc_restart_call_prepare(task);
fc01cea9
AA		 6462 return;
6463 }
6464 }
fc01cea9 6465 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6466out:
fc01cea9
AA		 6467 dprintk("<-- %s\n", __func__);
6468}
6469
6470static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6471{
d5f8d3fe
TM		 6472 struct nfs4_sequence_data *calldata = data;
6473 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6474 struct nfs4_sequence_args *args;
6475 struct nfs4_sequence_res *res;
6476
fc01cea9
AA		 6477 args = task->tk_msg.rpc_argp;
6478 res = task->tk_msg.rpc_resp;
6479
d9afbd1b 6480 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6481}
6482
6483static const struct rpc_call_ops nfs41_sequence_ops = {
6484 .rpc_call_done = nfs41_sequence_call_done,
6485 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6486 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6487};
6488
8fe72bac
TM		 6489static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6490 struct rpc_cred *cred,
6491 bool is_privileged)
fc01cea9 6492{
d5f8d3fe 6493 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6494 struct rpc_message msg = {
6495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6496 .rpc_cred = cred,
6497 };
71ac6da9
TM		 6498 struct rpc_task_setup task_setup_data = {
6499 .rpc_client = clp->cl_rpcclient,
6500 .rpc_message = &msg,
8fe72bac 6501 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6502 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6503 };
fc01cea9 6504
7135840f 6505 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6506 return ERR_PTR(-EIO);
dfb4f309 6507 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6508 if (calldata == NULL) {
7135840f 6509 nfs_put_client(clp);
71ac6da9 6510 return ERR_PTR(-ENOMEM);
fc01cea9 6511 }
9d12b216 6512 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6513 if (is_privileged)
6514 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6515 msg.rpc_argp = &calldata->args;
6516 msg.rpc_resp = &calldata->res;
6517 calldata->clp = clp;
71ac6da9 6518 task_setup_data.callback_data = calldata;
fc01cea9 6519
71ac6da9
TM		 6520 return rpc_run_task(&task_setup_data);
6521}
6522
2f60ea6b 6523static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6524{
6525 struct rpc_task *task;
6526 int ret = 0;
6527
2f60ea6b
TM		 6528 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6529 return 0;
8fe72bac 6530 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6531 if (IS_ERR(task))
6532 ret = PTR_ERR(task);
6533 else
bf294b41 6534 rpc_put_task_async(task);
71ac6da9
TM		 6535 dprintk("<-- %s status=%d\n", __func__, ret);
6536 return ret;
6537}
6538
6539static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6540{
6541 struct rpc_task *task;
6542 int ret;
6543
8fe72bac 6544 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6545 if (IS_ERR(task)) {
6546 ret = PTR_ERR(task);
6547 goto out;
6548 }
6549 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6550 if (!ret) {
6551 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6552
6553 if (task->tk_status == 0)
6554 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6555 ret = task->tk_status;
b4410c2f 6556 }
71ac6da9
TM		 6557 rpc_put_task(task);
6558out:
6559 dprintk("<-- %s status=%d\n", __func__, ret);
6560 return ret;
fc01cea9
AA		 6561}
6562
fce5c838
RL		 6563struct nfs4_reclaim_complete_data {
6564 struct nfs_client *clp;
6565 struct nfs41_reclaim_complete_args arg;
6566 struct nfs41_reclaim_complete_res res;
6567};
6568
6569static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6570{
6571 struct nfs4_reclaim_complete_data *calldata = data;
6572
d9afbd1b
TM		 6573 nfs41_setup_sequence(calldata->clp->cl_session,
6574 &calldata->arg.seq_args,
6575 &calldata->res.seq_res,
6576 task);
fce5c838
RL		 6577}
6578
aa5190d0
TM		 6579static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6580{
6581 switch(task->tk_status) {
6582 case 0:
6583 case -NFS4ERR_COMPLETE_ALREADY:
6584 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6585 break;
6586 case -NFS4ERR_DELAY:
aa5190d0 6587 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6588 /* fall through */
6589 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6590 return -EAGAIN;
6591 default:
0400a6b0 6592 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6593 }
6594 return 0;
6595}
6596
fce5c838
RL		 6597static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6598{
6599 struct nfs4_reclaim_complete_data *calldata = data;
6600 struct nfs_client *clp = calldata->clp;
6601 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6602
6603 dprintk("--> %s\n", __func__);
14516c3a
TM		 6604 if (!nfs41_sequence_done(task, res))
6605 return;
fce5c838 6606
c6d01c6f 6607 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6608 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6609 rpc_restart_call_prepare(task);
6610 return;
6611 }
fce5c838
RL		 6612 dprintk("<-- %s\n", __func__);
6613}
6614
6615static void nfs4_free_reclaim_complete_data(void *data)
6616{
6617 struct nfs4_reclaim_complete_data *calldata = data;
6618
6619 kfree(calldata);
6620}
6621
6622static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6623 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6624 .rpc_call_done = nfs4_reclaim_complete_done,
6625 .rpc_release = nfs4_free_reclaim_complete_data,
6626};
6627
6628/*
6629 * Issue a global reclaim complete.
6630 */
965e9c23
TM		 6631static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6632 struct rpc_cred *cred)
fce5c838
RL		 6633{
6634 struct nfs4_reclaim_complete_data *calldata;
6635 struct rpc_task *task;
6636 struct rpc_message msg = {
6637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6638 .rpc_cred = cred,
fce5c838
RL		 6639 };
6640 struct rpc_task_setup task_setup_data = {
6641 .rpc_client = clp->cl_rpcclient,
6642 .rpc_message = &msg,
6643 .callback_ops = &nfs4_reclaim_complete_call_ops,
6644 .flags = RPC_TASK_ASYNC,
6645 };
6646 int status = -ENOMEM;
6647
6648 dprintk("--> %s\n", __func__);
8535b2be 6649 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6650 if (calldata == NULL)
6651 goto out;
6652 calldata->clp = clp;
6653 calldata->arg.one_fs = 0;
fce5c838 6654
9d12b216 6655 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6656 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6657 msg.rpc_argp = &calldata->arg;
6658 msg.rpc_resp = &calldata->res;
6659 task_setup_data.callback_data = calldata;
6660 task = rpc_run_task(&task_setup_data);
acf82b85 6661 if (IS_ERR(task)) {
fce5c838 6662 status = PTR_ERR(task);
acf82b85
DC		 6663 goto out;
6664 }
c34c32ea
AA		 6665 status = nfs4_wait_for_completion_rpc_task(task);
6666 if (status == 0)
6667 status = task->tk_status;
fce5c838 6668 rpc_put_task(task);
acf82b85 6669 return 0;
fce5c838
RL		 6670out:
6671 dprintk("<-- %s status=%d\n", __func__, status);
6672 return status;
6673}
b1f69b75
AA		 6674
6675static void
6676nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6677{
6678 struct nfs4_layoutget *lgp = calldata;
c31663d4 6679 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6680 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6681
6682 dprintk("--> %s\n", __func__);
c31663d4
FI		 6683 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6684 * right now covering the LAYOUTGET we are about to send.
6685 * However, that is not so catastrophic, and there seems
6686 * to be no way to prevent it completely.
6687 */
6ba7db34 6688 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6689 &lgp->res.seq_res, task))
b1f69b75 6690 return;
cf7d63f1
FI		 6691 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6692 NFS_I(lgp->args.inode)->layout,
6693 lgp->args.ctx->state)) {
6694 rpc_exit(task, NFS4_OK);
cf7d63f1 6695 }
b1f69b75
AA		 6696}
6697
6698static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6699{
6700 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6701 struct inode *inode = lgp->args.inode;
6702 struct nfs_server *server = NFS_SERVER(inode);
6703 struct pnfs_layout_hdr *lo;
6704 struct nfs4_state *state = NULL;
30005121 6705 unsigned long timeo, giveup;
b1f69b75
AA		 6706
6707 dprintk("--> %s\n", __func__);
6708
6ba7db34 6709 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6710 goto out;
b1f69b75
AA		 6711
6712 switch (task->tk_status) {
6713 case 0:
ee314c2a 6714 goto out;
b1f69b75
AA		 6715 case -NFS4ERR_LAYOUTTRYLATER:
6716 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6717 timeo = rpc_get_timeout(task->tk_client);
6718 giveup = lgp->args.timestamp + timeo;
6719 if (time_after(giveup, jiffies))
6720 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6721 break;
6722 case -NFS4ERR_EXPIRED:
6723 case -NFS4ERR_BAD_STATEID:
6724 spin_lock(&inode->i_lock);
6725 lo = NFS_I(inode)->layout;
6726 if (!lo || list_empty(&lo->plh_segs)) {
6727 spin_unlock(&inode->i_lock);
6728 /* If the open stateid was bad, then recover it. */
6729 state = lgp->args.ctx->state;
6730 } else {
6731 LIST_HEAD(head);
6732
6733 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6734 spin_unlock(&inode->i_lock);
6735 /* Mark the bad layout state as invalid, then
6736 * retry using the open stateid. */
6737 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6738 }
6739 }
ee314c2a
TM		 6740 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6741 rpc_restart_call_prepare(task);
6742out:
b1f69b75
AA		 6743 dprintk("<-- %s\n", __func__);
6744}
6745
8554116e
IK		 6746static size_t max_response_pages(struct nfs_server *server)
6747{
6748 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6749 return nfs_page_array_len(0, max_resp_sz);
6750}
6751
6752static void nfs4_free_pages(struct page **pages, size_t size)
6753{
6754 int i;
6755
6756 if (!pages)
6757 return;
6758
6759 for (i = 0; i < size; i++) {
6760 if (!pages[i])
6761 break;
6762 __free_page(pages[i]);
6763 }
6764 kfree(pages);
6765}
6766
6767static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6768{
6769 struct page **pages;
6770 int i;
6771
6772 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6773 if (!pages) {
6774 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6775 return NULL;
6776 }
6777
6778 for (i = 0; i < size; i++) {
6779 pages[i] = alloc_page(gfp_flags);
6780 if (!pages[i]) {
6781 dprintk("%s: failed to allocate page\n", __func__);
6782 nfs4_free_pages(pages, size);
6783 return NULL;
6784 }
6785 }
6786
6787 return pages;
6788}
6789
b1f69b75
AA		 6790static void nfs4_layoutget_release(void *calldata)
6791{
6792 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6793 struct inode *inode = lgp->args.inode;
6794 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6795 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6796
6797 dprintk("--> %s\n", __func__);
8554116e 6798 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6799 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6800 put_nfs_open_context(lgp->args.ctx);
6801 kfree(calldata);
6802 dprintk("<-- %s\n", __func__);
6803}
6804
6805static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6806 .rpc_call_prepare = nfs4_layoutget_prepare,
6807 .rpc_call_done = nfs4_layoutget_done,
6808 .rpc_release = nfs4_layoutget_release,
6809};
6810
a0b0a6e3
TM		 6811struct pnfs_layout_segment *
6812nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6813{
a47970ff
WAA		 6814 struct inode *inode = lgp->args.inode;
6815 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6816 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6817 struct rpc_task *task;
6818 struct rpc_message msg = {
6819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6820 .rpc_argp = &lgp->args,
6821 .rpc_resp = &lgp->res,
6ab59344 6822 .rpc_cred = lgp->cred,
b1f69b75
AA		 6823 };
6824 struct rpc_task_setup task_setup_data = {
6825 .rpc_client = server->client,
6826 .rpc_message = &msg,
6827 .callback_ops = &nfs4_layoutget_call_ops,
6828 .callback_data = lgp,
6829 .flags = RPC_TASK_ASYNC,
6830 };
a0b0a6e3 6831 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6832 int status = 0;
6833
6834 dprintk("--> %s\n", __func__);
6835
8554116e
IK		 6836 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6837 if (!lgp->args.layout.pages) {
6838 nfs4_layoutget_release(lgp);
a0b0a6e3 6839 return ERR_PTR(-ENOMEM);
8554116e
IK		 6840 }
6841 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6842 lgp->args.timestamp = jiffies;
8554116e 6843
35124a09 6844 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6845 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6846 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6847
6848 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6849 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6850
b1f69b75
AA		 6851 task = rpc_run_task(&task_setup_data);
6852 if (IS_ERR(task))
a0b0a6e3 6853 return ERR_CAST(task);
b1f69b75 6854 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6855 if (status == 0)
6856 status = task->tk_status;
085b7a45
WAA		 6857 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6858 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6859 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6860 rpc_put_task(task);
6861 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6862 if (status)
6863 return ERR_PTR(status);
6864 return lseg;
b1f69b75
AA		 6865}
6866
cbe82603
BH		 6867static void
6868nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6869{
6870 struct nfs4_layoutreturn *lrp = calldata;
6871
6872 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6873 nfs41_setup_sequence(lrp->clp->cl_session,
6874 &lrp->args.seq_args,
6875 &lrp->res.seq_res,
6876 task);
cbe82603
BH		 6877}
6878
6879static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6880{
6881 struct nfs4_layoutreturn *lrp = calldata;
6882 struct nfs_server *server;
6883
6884 dprintk("--> %s\n", __func__);
6885
6ba7db34 6886 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6887 return;
6888
6889 server = NFS_SERVER(lrp->args.inode);
6890 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6891 rpc_restart_call_prepare(task);
cbe82603
BH		 6892 return;
6893 }
cbe82603
BH		 6894 dprintk("<-- %s\n", __func__);
6895}
6896
6897static void nfs4_layoutreturn_release(void *calldata)
6898{
6899 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6900 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6901
6902 dprintk("--> %s\n", __func__);
849b286f
TM		 6903 spin_lock(&lo->plh_inode->i_lock);
6904 if (lrp->res.lrs_present)
6905 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6906 lo->plh_block_lgets--;
6907 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6908 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6909 kfree(calldata);
6910 dprintk("<-- %s\n", __func__);
6911}
6912
6913static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6914 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6915 .rpc_call_done = nfs4_layoutreturn_done,
6916 .rpc_release = nfs4_layoutreturn_release,
6917};
6918
6919int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6920{
6921 struct rpc_task *task;
6922 struct rpc_message msg = {
6923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6924 .rpc_argp = &lrp->args,
6925 .rpc_resp = &lrp->res,
9556000d 6926 .rpc_cred = lrp->cred,
cbe82603
BH		 6927 };
6928 struct rpc_task_setup task_setup_data = {
1771c577 6929 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6930 .rpc_message = &msg,
6931 .callback_ops = &nfs4_layoutreturn_call_ops,
6932 .callback_data = lrp,
6933 };
6934 int status;
6935
6936 dprintk("--> %s\n", __func__);
9d12b216 6937 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6938 task = rpc_run_task(&task_setup_data);
6939 if (IS_ERR(task))
6940 return PTR_ERR(task);
6941 status = task->tk_status;
6942 dprintk("<-- %s status=%d\n", __func__, status);
6943 rpc_put_task(task);
6944 return status;
6945}
6946
7f11d8d3
AA		 6947/*
6948 * Retrieve the list of Data Server devices from the MDS.
6949 */
6950static int _nfs4_getdevicelist(struct nfs_server *server,
6951 const struct nfs_fh *fh,
6952 struct pnfs_devicelist *devlist)
6953{
6954 struct nfs4_getdevicelist_args args = {
6955 .fh = fh,
6956 .layoutclass = server->pnfs_curr_ld->id,
6957 };
6958 struct nfs4_getdevicelist_res res = {
6959 .devlist = devlist,
6960 };
6961 struct rpc_message msg = {
6962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6963 .rpc_argp = &args,
6964 .rpc_resp = &res,
6965 };
6966 int status;
6967
6968 dprintk("--> %s\n", __func__);
6969 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6970 &res.seq_res, 0);
6971 dprintk("<-- %s status=%d\n", __func__, status);
6972 return status;
6973}
6974
6975int nfs4_proc_getdevicelist(struct nfs_server *server,
6976 const struct nfs_fh *fh,
6977 struct pnfs_devicelist *devlist)
6978{
6979 struct nfs4_exception exception = { };
6980 int err;
6981
6982 do {
6983 err = nfs4_handle_exception(server,
6984 _nfs4_getdevicelist(server, fh, devlist),
6985 &exception);
6986 } while (exception.retry);
6987
6988 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6989 err, devlist->num_devs);
6990
6991 return err;
6992}
6993EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6994
b1f69b75 6995static int
cd5875fe
TM		 6996_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6997 struct pnfs_device *pdev,
6998 struct rpc_cred *cred)
b1f69b75
AA		 6999{
7000 struct nfs4_getdeviceinfo_args args = {
7001 .pdev = pdev,
7002 };
7003 struct nfs4_getdeviceinfo_res res = {
7004 .pdev = pdev,
7005 };
7006 struct rpc_message msg = {
7007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7008 .rpc_argp = &args,
7009 .rpc_resp = &res,
cd5875fe 7010 .rpc_cred = cred,
b1f69b75
AA		 7011 };
7012 int status;
7013
7014 dprintk("--> %s\n", __func__);
7c513058 7015 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7016 dprintk("<-- %s status=%d\n", __func__, status);
7017
7018 return status;
7019}
7020
cd5875fe
TM		 7021int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7022 struct pnfs_device *pdev,
7023 struct rpc_cred *cred)
b1f69b75
AA		 7024{
7025 struct nfs4_exception exception = { };
7026 int err;
7027
7028 do {
7029 err = nfs4_handle_exception(server,
cd5875fe 7030 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7031 &exception);
7032 } while (exception.retry);
7033 return err;
7034}
7035EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7036
863a3c6c
AA		 7037static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7038{
7039 struct nfs4_layoutcommit_data *data = calldata;
7040 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7041 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7042
d9afbd1b
TM		 7043 nfs41_setup_sequence(session,
7044 &data->args.seq_args,
7045 &data->res.seq_res,
7046 task);
863a3c6c
AA		 7047}
7048
7049static void
7050nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7051{
7052 struct nfs4_layoutcommit_data *data = calldata;
7053 struct nfs_server *server = NFS_SERVER(data->args.inode);
7054
6ba7db34 7055 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7056 return;
7057
7058 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7059 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7060 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7061 case -NFS4ERR_BADLAYOUT: /* no layout */
7062 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7063 task->tk_status = 0;
e59d27e0
TM		 7064 break;
7065 case 0:
863a3c6c
AA		 7066 nfs_post_op_update_inode_force_wcc(data->args.inode,
7067 data->res.fattr);
e59d27e0
TM		 7068 break;
7069 default:
7070 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7071 rpc_restart_call_prepare(task);
7072 return;
7073 }
7074 }
863a3c6c
AA		 7075}
7076
7077static void nfs4_layoutcommit_release(void *calldata)
7078{
7079 struct nfs4_layoutcommit_data *data = calldata;
7080
db29c089 7081 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7082 put_rpccred(data->cred);
7083 kfree(data);
7084}
7085
7086static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7087 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7088 .rpc_call_done = nfs4_layoutcommit_done,
7089 .rpc_release = nfs4_layoutcommit_release,
7090};
7091
7092int
ef311537 7093nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7094{
7095 struct rpc_message msg = {
7096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7097 .rpc_argp = &data->args,
7098 .rpc_resp = &data->res,
7099 .rpc_cred = data->cred,
7100 };
7101 struct rpc_task_setup task_setup_data = {
7102 .task = &data->task,
7103 .rpc_client = NFS_CLIENT(data->args.inode),
7104 .rpc_message = &msg,
7105 .callback_ops = &nfs4_layoutcommit_ops,
7106 .callback_data = data,
7107 .flags = RPC_TASK_ASYNC,
7108 };
7109 struct rpc_task *task;
7110 int status = 0;
7111
7112 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7113 "lbw: %llu inode %lu\n",
7114 data->task.tk_pid, sync,
7115 data->args.lastbytewritten,
7116 data->args.inode->i_ino);
7117
9d12b216 7118 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7119 task = rpc_run_task(&task_setup_data);
7120 if (IS_ERR(task))
7121 return PTR_ERR(task);
ef311537 7122 if (sync == false)
863a3c6c
AA		 7123 goto out;
7124 status = nfs4_wait_for_completion_rpc_task(task);
7125 if (status != 0)
7126 goto out;
7127 status = task->tk_status;
7128out:
7129 dprintk("%s: status %d\n", __func__, status);
7130 rpc_put_task(task);
7131 return status;
7132}
fca78d6d 7133
97431204
AA		 7134/**
7135 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7136 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7137 */
fca78d6d
BS		 7138static int
7139_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7140 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7141{
7142 struct nfs41_secinfo_no_name_args args = {
7143 .style = SECINFO_STYLE_CURRENT_FH,
7144 };
7145 struct nfs4_secinfo_res res = {
7146 .flavors = flavors,
7147 };
7148 struct rpc_message msg = {
7149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7150 .rpc_argp = &args,
7151 .rpc_resp = &res,
7152 };
97431204
AA		 7153 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7154 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7155}
7156
7157static int
7158nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7159 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7160{
7161 struct nfs4_exception exception = { };
7162 int err;
7163 do {
7164 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7165 switch (err) {
7166 case 0:
7167 case -NFS4ERR_WRONGSEC:
7168 case -NFS4ERR_NOTSUPP:
05e9cfb4 7169 goto out;
fca78d6d
BS		 7170 default:
7171 err = nfs4_handle_exception(server, err, &exception);
7172 }
7173 } while (exception.retry);
05e9cfb4 7174out:
fca78d6d
BS		 7175 return err;
7176}
7177
7178static int
7179nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7180 struct nfs_fsinfo *info)
7181{
7182 int err;
7183 struct page *page;
7184 rpc_authflavor_t flavor;
7185 struct nfs4_secinfo_flavors *flavors;
7186
7187 page = alloc_page(GFP_KERNEL);
7188 if (!page) {
7189 err = -ENOMEM;
7190 goto out;
7191 }
7192
7193 flavors = page_address(page);
7194 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7195
7196 /*
7197 * Fall back on "guess and check" method if
7198 * the server doesn't support SECINFO_NO_NAME
7199 */
7200 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7201 err = nfs4_find_root_sec(server, fhandle, info);
7202 goto out_freepage;
7203 }
7204 if (err)
7205 goto out_freepage;
7206
7207 flavor = nfs_find_best_sec(flavors);
7208 if (err == 0)
7209 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7210
7211out_freepage:
7212 put_page(page);
7213 if (err == -EACCES)
7214 return -EPERM;
7215out:
7216 return err;
7217}
1cab0652 7218
ab7cb0df
TM		 7219static int _nfs41_test_stateid(struct nfs_server *server,
7220 nfs4_stateid *stateid,
7221 struct rpc_cred *cred)
7d974794
BS		 7222{
7223 int status;
7224 struct nfs41_test_stateid_args args = {
1cab0652 7225 .stateid = stateid,
7d974794
BS		 7226 };
7227 struct nfs41_test_stateid_res res;
7228 struct rpc_message msg = {
7229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7230 .rpc_argp = &args,
7231 .rpc_resp = &res,
ab7cb0df 7232 .rpc_cred = cred,
7d974794 7233 };
1cab0652 7234
38527b15 7235 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7236 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7237 nfs4_set_sequence_privileged(&args.seq_args);
7238 status = nfs4_call_sync_sequence(server->client, server, &msg,
7239 &args.seq_args, &res.seq_res);
38527b15
CL		 7240 if (status != NFS_OK) {
7241 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7242 return status;
38527b15
CL		 7243 }
7244 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7245 return -res.status;
7d974794
BS		 7246}
7247
38527b15
CL		 7248/**
7249 * nfs41_test_stateid - perform a TEST_STATEID operation
7250 *
7251 * @server: server / transport on which to perform the operation
7252 * @stateid: state ID to test
ab7cb0df 7253 * @cred: credential
38527b15
CL		 7254 *
7255 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7256 * Otherwise a negative NFS4ERR value is returned if the operation
7257 * failed or the state ID is not currently valid.
7258 */
ab7cb0df
TM		 7259static int nfs41_test_stateid(struct nfs_server *server,
7260 nfs4_stateid *stateid,
7261 struct rpc_cred *cred)
7d974794
BS		 7262{
7263 struct nfs4_exception exception = { };
7264 int err;
7265 do {
ab7cb0df 7266 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7267 if (err != -NFS4ERR_DELAY)
7268 break;
7269 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7270 } while (exception.retry);
7271 return err;
7272}
9aeda35f 7273
7c1d5fae
TM		 7274struct nfs_free_stateid_data {
7275 struct nfs_server *server;
7276 struct nfs41_free_stateid_args args;
9aeda35f 7277 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7278};
7279
7280static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7281{
7282 struct nfs_free_stateid_data *data = calldata;
7283 nfs41_setup_sequence(nfs4_get_session(data->server),
7284 &data->args.seq_args,
7285 &data->res.seq_res,
7286 task);
7287}
7288
7289static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7290{
7291 struct nfs_free_stateid_data *data = calldata;
7292
7293 nfs41_sequence_done(task, &data->res.seq_res);
7294
7295 switch (task->tk_status) {
7296 case -NFS4ERR_DELAY:
7297 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7298 rpc_restart_call_prepare(task);
7299 }
7300}
7301
7302static void nfs41_free_stateid_release(void *calldata)
7303{
7304 kfree(calldata);
7305}
7306
17f26b12 7307static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7308 .rpc_call_prepare = nfs41_free_stateid_prepare,
7309 .rpc_call_done = nfs41_free_stateid_done,
7310 .rpc_release = nfs41_free_stateid_release,
7311};
7312
7313static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7314 nfs4_stateid *stateid,
ab7cb0df 7315 struct rpc_cred *cred,
7c1d5fae
TM		 7316 bool privileged)
7317{
9aeda35f
BS		 7318 struct rpc_message msg = {
7319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7320 .rpc_cred = cred,
9aeda35f 7321 };
7c1d5fae
TM		 7322 struct rpc_task_setup task_setup = {
7323 .rpc_client = server->client,
7324 .rpc_message = &msg,
7325 .callback_ops = &nfs41_free_stateid_ops,
7326 .flags = RPC_TASK_ASYNC,
7327 };
7328 struct nfs_free_stateid_data *data;
9aeda35f 7329
38527b15 7330 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7331 data = kmalloc(sizeof(*data), GFP_NOFS);
7332 if (!data)
7333 return ERR_PTR(-ENOMEM);
7334 data->server = server;
7335 nfs4_stateid_copy(&data->args.stateid, stateid);
7336
7337 task_setup.callback_data = data;
7338
7339 msg.rpc_argp = &data->args;
7340 msg.rpc_resp = &data->res;
7341 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7342 if (privileged)
7343 nfs4_set_sequence_privileged(&data->args.seq_args);
7344
7345 return rpc_run_task(&task_setup);
9aeda35f
BS		 7346}
7347
38527b15
CL		 7348/**
7349 * nfs41_free_stateid - perform a FREE_STATEID operation
7350 *
7351 * @server: server / transport on which to perform the operation
7352 * @stateid: state ID to release
ab7cb0df 7353 * @cred: credential
38527b15
CL		 7354 *
7355 * Returns NFS_OK if the server freed "stateid". Otherwise a
7356 * negative NFS4ERR value is returned.
7357 */
ab7cb0df
TM		 7358static int nfs41_free_stateid(struct nfs_server *server,
7359 nfs4_stateid *stateid,
7360 struct rpc_cred *cred)
9aeda35f 7361{
7c1d5fae
TM		 7362 struct rpc_task *task;
7363 int ret;
7364
ab7cb0df 7365 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7366 if (IS_ERR(task))
7367 return PTR_ERR(task);
7368 ret = rpc_wait_for_completion_task(task);
7369 if (!ret)
7370 ret = task->tk_status;
7371 rpc_put_task(task);
7372 return ret;
9aeda35f 7373}
36281caa 7374
c8b2d0bf
TM		 7375static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7376{
7377 struct rpc_task *task;
ab7cb0df 7378 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7379
ab7cb0df 7380 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7381 nfs4_free_lock_state(server, lsp);
7382 if (IS_ERR(task))
7383 return PTR_ERR(task);
7384 rpc_put_task(task);
7385 return 0;
7386}
7387
36281caa
TM		 7388static bool nfs41_match_stateid(const nfs4_stateid *s1,
7389 const nfs4_stateid *s2)
7390{
2d2f24ad 7391 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7392 return false;
7393
2d2f24ad 7394 if (s1->seqid == s2->seqid)
36281caa 7395 return true;
2d2f24ad 7396 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7397 return true;
7398
7399 return false;
7400}
7401
557134a3
AA		 7402#endif /* CONFIG_NFS_V4_1 */
7403
36281caa
TM		 7404static bool nfs4_match_stateid(const nfs4_stateid *s1,
7405 const nfs4_stateid *s2)
7406{
f597c537 7407 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7408}
7409
7410
17280175 7411static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7412 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7413 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7414 .recover_open = nfs4_open_reclaim,
7415 .recover_lock = nfs4_lock_reclaim,
591d71cb 7416 .establish_clid = nfs4_init_clientid,
05f4c350 7417 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7418};
7419
591d71cb 7420#if defined(CONFIG_NFS_V4_1)
17280175 7421static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7422 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7423 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7424 .recover_open = nfs4_open_reclaim,
7425 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7426 .establish_clid = nfs41_init_clientid,
fce5c838 7427 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7428 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7429};
7430#endif /* CONFIG_NFS_V4_1 */
7431
17280175 7432static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7433 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7434 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7435 .recover_open = nfs4_open_expired,
7436 .recover_lock = nfs4_lock_expired,
7437 .establish_clid = nfs4_init_clientid,
7438};
7439
7440#if defined(CONFIG_NFS_V4_1)
17280175 7441static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7442 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7443 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7444 .recover_open = nfs41_open_expired,
7445 .recover_lock = nfs41_lock_expired,
4d643d1d 7446 .establish_clid = nfs41_init_clientid,
1da177e4 7447};
591d71cb 7448#endif /* CONFIG_NFS_V4_1 */
1da177e4 7449
17280175 7450static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7451 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7452 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7453 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7454};
7455
7456#if defined(CONFIG_NFS_V4_1)
17280175 7457static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7458 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7459 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7460 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7461};
7462#endif
7463
97dc1359
TM		 7464static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7465 .minor_version = 0,
39c6daae
TM		 7466 .init_caps = NFS_CAP_READDIRPLUS
7467 | NFS_CAP_ATOMIC_OPEN
7468 | NFS_CAP_CHANGE_ATTR
7469 | NFS_CAP_POSIX_LOCK,
97dc1359 7470 .call_sync = _nfs4_call_sync,
36281caa 7471 .match_stateid = nfs4_match_stateid,
fca78d6d 7472 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7473 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7474 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7475 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7476 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7477};
7478
7479#if defined(CONFIG_NFS_V4_1)
7480static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7481 .minor_version = 1,
39c6daae
TM		 7482 .init_caps = NFS_CAP_READDIRPLUS
7483 | NFS_CAP_ATOMIC_OPEN
7484 | NFS_CAP_CHANGE_ATTR
3b66486c 7485 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7486 | NFS_CAP_STATEID_NFSV41
7487 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7488 .call_sync = nfs4_call_sync_sequence,
36281caa 7489 .match_stateid = nfs41_match_stateid,
fca78d6d 7490 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7491 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7492 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7493 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7494 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7495};
7496#endif
7497
42c2c424
SD		 7498#if defined(CONFIG_NFS_V4_2)
7499static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7500 .minor_version = 2,
7017310a
BS		 7501 .init_caps = NFS_CAP_READDIRPLUS
7502 | NFS_CAP_ATOMIC_OPEN
7503 | NFS_CAP_CHANGE_ATTR
7504 | NFS_CAP_POSIX_LOCK
7505 | NFS_CAP_STATEID_NFSV41
7506 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7507 .call_sync = nfs4_call_sync_sequence,
7508 .match_stateid = nfs41_match_stateid,
7509 .find_root_sec = nfs41_find_root_sec,
7017310a 7510 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7511 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7512 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7513 .state_renewal_ops = &nfs41_state_renewal_ops,
7514};
7515#endif
7516
97dc1359
TM		 7517const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7518 [0] = &nfs_v4_0_minor_ops,
7519#if defined(CONFIG_NFS_V4_1)
7520 [1] = &nfs_v4_1_minor_ops,
7521#endif
42c2c424
SD		 7522#if defined(CONFIG_NFS_V4_2)
7523 [2] = &nfs_v4_2_minor_ops,
7524#endif
97dc1359
TM		 7525};
7526
17f26b12 7527static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7528 .create = nfs_create,
7529 .lookup = nfs_lookup,
7530 .atomic_open = nfs_atomic_open,
7531 .link = nfs_link,
7532 .unlink = nfs_unlink,
7533 .symlink = nfs_symlink,
7534 .mkdir = nfs_mkdir,
7535 .rmdir = nfs_rmdir,
7536 .mknod = nfs_mknod,
7537 .rename = nfs_rename,
7538 .permission = nfs_permission,
7539 .getattr = nfs_getattr,
7540 .setattr = nfs_setattr,
7541 .getxattr = generic_getxattr,
7542 .setxattr = generic_setxattr,
7543 .listxattr = generic_listxattr,
7544 .removexattr = generic_removexattr,
7545};
7546
92e1d5be 7547static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7548 .permission = nfs_permission,
7549 .getattr = nfs_getattr,
7550 .setattr = nfs_setattr,
64c2ce8b
AK		 7551 .getxattr = generic_getxattr,
7552 .setxattr = generic_setxattr,
7553 .listxattr = generic_listxattr,
7554 .removexattr = generic_removexattr,
6b3b5496
BF		 7555};
7556
509de811 7557const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7558 .version = 4, /* protocol version */
7559 .dentry_ops = &nfs4_dentry_operations,
7560 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7561 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7562 .file_ops = &nfs4_file_operations,
1da177e4 7563 .getroot = nfs4_proc_get_root,
281cad46 7564 .submount = nfs4_submount,
ff9099f2 7565 .try_mount = nfs4_try_mount,
1da177e4
LT		 7566 .getattr = nfs4_proc_getattr,
7567 .setattr = nfs4_proc_setattr,
7568 .lookup = nfs4_proc_lookup,
7569 .access = nfs4_proc_access,
7570 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7571 .create = nfs4_proc_create,
7572 .remove = nfs4_proc_remove,
7573 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7574 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7575 .unlink_done = nfs4_proc_unlink_done,
7576 .rename = nfs4_proc_rename,
d3d4152a 7577 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7578 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7579 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7580 .link = nfs4_proc_link,
7581 .symlink = nfs4_proc_symlink,
7582 .mkdir = nfs4_proc_mkdir,
7583 .rmdir = nfs4_proc_remove,
7584 .readdir = nfs4_proc_readdir,
7585 .mknod = nfs4_proc_mknod,
7586 .statfs = nfs4_proc_statfs,
7587 .fsinfo = nfs4_proc_fsinfo,
7588 .pathconf = nfs4_proc_pathconf,
e9326dca 7589 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7590 .decode_dirent = nfs4_decode_dirent,
7591 .read_setup = nfs4_proc_read_setup,
1abb5088 7592 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7593 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7594 .read_done = nfs4_read_done,
1da177e4 7595 .write_setup = nfs4_proc_write_setup,
57208fa7 7596 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7597 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7598 .write_done = nfs4_write_done,
1da177e4 7599 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7600 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7601 .commit_done = nfs4_commit_done,
1da177e4 7602 .lock = nfs4_proc_lock,
e50a1c2e 7603 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7604 .close_context = nfs4_close_context,
2b484297 7605 .open_context = nfs4_atomic_open,
011e2a7f 7606 .have_delegation = nfs4_have_delegation,
57ec14c5 7607 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7608 .alloc_client = nfs4_alloc_client,
45a52a02 7609 .init_client = nfs4_init_client,
cdb7eced 7610 .free_client = nfs4_free_client,
1179acc6
BS		 7611 .create_server = nfs4_create_server,
7612 .clone_server = nfs_clone_server,
1da177e4
LT		 7613};
7614
64c2ce8b
AK		 7615static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7616 .prefix = XATTR_NAME_NFSV4_ACL,
7617 .list = nfs4_xattr_list_nfs4_acl,
7618 .get = nfs4_xattr_get_nfs4_acl,
7619 .set = nfs4_xattr_set_nfs4_acl,
7620};
7621
7622const struct xattr_handler *nfs4_xattr_handlers[] = {
7623 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7624#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7625 &nfs4_xattr_nfs4_label_handler,
7626#endif
64c2ce8b
AK		 7627 NULL
7628};
7629
1da177e4
LT		 7630/*
7631 * Local variables:
7632 * c-basic-offset: 8
7633 * End:
7634 */
Linux 6.x block layer and io_uring tree(s)