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Recover from stateid-type error on SETATTR
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
011e2a7f 359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 360 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 361 exception->retry = 1;
362 return 0;
363 }
364 if (state == NULL)
365 break;
5d422301
TM		 366 ret = nfs4_schedule_stateid_recovery(server, state);
367 if (ret < 0)
368 break;
3114ea7a 369 goto wait_on_recovery;
a1d0b5ee 370 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
ae2ffef3
OK		 373 if (state == NULL) {
374 if (inode && nfs4_have_delegation(inode,
375 FMODE_READ)) {
376 nfs4_inode_return_delegation(inode);
377 exception->retry = 1;
378 }
9e33bed5 379 break;
ae2ffef3 380 }
5d422301
TM		 381 ret = nfs4_schedule_stateid_recovery(server, state);
382 if (ret < 0)
383 break;
0400a6b0 384 goto wait_on_recovery;
0ced63d1 385 case -NFS4ERR_EXPIRED:
5d422301
TM		 386 if (state != NULL) {
387 ret = nfs4_schedule_stateid_recovery(server, state);
388 if (ret < 0)
389 break;
390 }
65de872e 391 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 392 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 393 nfs4_schedule_lease_recovery(clp);
394 goto wait_on_recovery;
519ae255
CL		 395 case -NFS4ERR_MOVED:
396 ret = nfs4_schedule_migration_recovery(server);
397 if (ret < 0)
398 break;
399 goto wait_on_recovery;
8ef2f8d4
CL		 400 case -NFS4ERR_LEASE_MOVED:
401 nfs4_schedule_lease_moved_recovery(clp);
402 goto wait_on_recovery;
03391693 403#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 404 case -NFS4ERR_BADSESSION:
405 case -NFS4ERR_BADSLOT:
406 case -NFS4ERR_BAD_HIGH_SLOT:
407 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
408 case -NFS4ERR_DEADSESSION:
409 case -NFS4ERR_SEQ_FALSE_RETRY:
410 case -NFS4ERR_SEQ_MISORDERED:
411 dprintk("%s ERROR: %d Reset session\n", __func__,
412 errorcode);
9f594791 413 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 414 goto wait_on_recovery;
03391693 415#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 416 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 417 if (exception->timeout > HZ) {
418 /* We have retried a decent amount, time to
419 * fail
420 */
421 ret = -EBUSY;
422 break;
423 }
65de872e
TM		 424 case -NFS4ERR_GRACE:
425 case -NFS4ERR_DELAY:
426 ret = nfs4_delay(server->client, &exception->timeout);
427 if (ret != 0)
428 break;
a8a4ae3a 429 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 430 case -NFS4ERR_OLD_STATEID:
431 exception->retry = 1;
b064eca2
TM		 432 break;
433 case -NFS4ERR_BADOWNER:
434 /* The following works around a Linux server bug! */
435 case -NFS4ERR_BADNAME:
436 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
437 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
438 exception->retry = 1;
439 printk(KERN_WARNING "NFS: v4 server %s "
440 "does not accept raw "
441 "uid/gids. "
442 "Reenabling the idmapper.\n",
443 server->nfs_client->cl_hostname);
444 }
65de872e
TM		 445 }
446 /* We failed to handle the error */
447 return nfs4_map_errors(ret);
0400a6b0 448wait_on_recovery:
a2c0b9e2 449 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 450 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
451 return -EIO;
a2c0b9e2
TM		 452 if (ret == 0)
453 exception->retry = 1;
454 return ret;
65de872e
TM		 455}
456
a5250def
WAA		 457/*
458 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
459 * or 'false' otherwise.
460 */
461static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
462{
463 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
464
465 if (flavor == RPC_AUTH_GSS_KRB5I ||
466 flavor == RPC_AUTH_GSS_KRB5P)
467 return true;
468
469 return false;
470}
65de872e 471
452e9352 472static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 473{
1da177e4
LT		 474 spin_lock(&clp->cl_lock);
475 if (time_before(clp->cl_last_renewal,timestamp))
476 clp->cl_last_renewal = timestamp;
477 spin_unlock(&clp->cl_lock);
478}
479
452e9352
TM		 480static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
481{
482 do_renew_lease(server->nfs_client, timestamp);
483}
484
2a3eb2b9
CL		 485struct nfs4_call_sync_data {
486 const struct nfs_server *seq_server;
487 struct nfs4_sequence_args *seq_args;
488 struct nfs4_sequence_res *seq_res;
489};
490
a9c92d6b
CL		 491static void nfs4_init_sequence(struct nfs4_sequence_args *args,
492 struct nfs4_sequence_res *res, int cache_reply)
493{
494 args->sa_slot = NULL;
495 args->sa_cache_this = cache_reply;
496 args->sa_privileged = 0;
497
498 res->sr_slot = NULL;
499}
500
501static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
502{
503 args->sa_privileged = 1;
504}
505
cb04ad2a
PT		 506int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
507 struct nfs4_sequence_args *args,
508 struct nfs4_sequence_res *res,
509 struct rpc_task *task)
3bd2384a 510{
3bd2384a
CL		 511 struct nfs4_slot *slot;
512
513 /* slot already allocated? */
514 if (res->sr_slot != NULL)
515 goto out_start;
516
517 spin_lock(&tbl->slot_tbl_lock);
518 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
519 goto out_sleep;
520
521 slot = nfs4_alloc_slot(tbl);
522 if (IS_ERR(slot)) {
523 if (slot == ERR_PTR(-ENOMEM))
524 task->tk_timeout = HZ >> 2;
525 goto out_sleep;
526 }
527 spin_unlock(&tbl->slot_tbl_lock);
528
529 args->sa_slot = slot;
530 res->sr_slot = slot;
531
532out_start:
533 rpc_call_start(task);
534 return 0;
535
536out_sleep:
537 if (args->sa_privileged)
538 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
539 NULL, RPC_PRIORITY_PRIVILEGED);
540 else
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 return -EAGAIN;
544}
cb04ad2a 545EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 546
547static int nfs40_sequence_done(struct rpc_task *task,
548 struct nfs4_sequence_res *res)
549{
550 struct nfs4_slot *slot = res->sr_slot;
551 struct nfs4_slot_table *tbl;
552
cab92c19 553 if (slot == NULL)
3bd2384a
CL		 554 goto out;
555
556 tbl = slot->table;
557 spin_lock(&tbl->slot_tbl_lock);
558 if (!nfs41_wake_and_assign_slot(tbl, slot))
559 nfs4_free_slot(tbl, slot);
560 spin_unlock(&tbl->slot_tbl_lock);
561
562 res->sr_slot = NULL;
563out:
564 return 1;
565}
566
cccef3b9
AA		 567#if defined(CONFIG_NFS_V4_1)
568
d185a334 569static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 570{
e3725ec0 571 struct nfs4_session *session;
13615871 572 struct nfs4_slot_table *tbl;
a13ce7c6 573 struct nfs4_slot *slot = res->sr_slot;
c10e4498 574 bool send_new_highest_used_slotid = false;
13615871 575
a13ce7c6 576 tbl = slot->table;
e3725ec0 577 session = tbl->session;
ea028ac9 578
35dc1d74 579 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 580 /* Be nice to the server: try to ensure that the last transmitted
581 * value for highest_user_slotid <= target_highest_slotid
582 */
583 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
584 send_new_highest_used_slotid = true;
585
a13ce7c6 586 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 587 send_new_highest_used_slotid = false;
588 goto out_unlock;
589 }
a13ce7c6 590 nfs4_free_slot(tbl, slot);
c10e4498
TM		 591
592 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
593 send_new_highest_used_slotid = false;
b75ad4cd 594out_unlock:
35dc1d74 595 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 596 res->sr_slot = NULL;
c10e4498
TM		 597 if (send_new_highest_used_slotid)
598 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 599}
600
f9c96fcc 601int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 602{
e3725ec0 603 struct nfs4_session *session;
a13ce7c6 604 struct nfs4_slot *slot = res->sr_slot;
14516c3a 605 struct nfs_client *clp;
ac20d163 606 bool interrupted = false;
85563073 607 int ret = 1;
b0df806c 608
a13ce7c6
TM		 609 if (slot == NULL)
610 goto out_noaction;
468f8613
BS		 611 /* don't increment the sequence number if the task wasn't sent */
612 if (!RPC_WAS_SENT(task))
b0df806c
AA		 613 goto out;
614
e3725ec0 615 session = slot->table->session;
933602e3 616
ac20d163
TM		 617 if (slot->interrupted) {
618 slot->interrupted = 0;
619 interrupted = true;
620 }
621
2f92ae34 622 trace_nfs4_sequence_done(session, res);
691daf3b 623 /* Check the SEQUENCE operation status */
14516c3a
TM		 624 switch (res->sr_status) {
625 case 0:
b0df806c 626 /* Update the slot's sequence and clientid lease timer */
933602e3 627 ++slot->seq_nr;
e3725ec0 628 clp = session->clp;
8e63b6a8 629 do_renew_lease(clp, res->sr_timestamp);
0629e370 630 /* Check sequence flags */
b4410c2f
TM		 631 if (res->sr_status_flags != 0)
632 nfs4_schedule_lease_recovery(clp);
464ee9f9 633 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 634 break;
ac20d163
TM		 635 case 1:
636 /*
637 * sr_status remains 1 if an RPC level error occurred.
638 * The server may or may not have processed the sequence
639 * operation..
640 * Mark the slot as having hosted an interrupted RPC call.
641 */
642 slot->interrupted = 1;
643 goto out;
14516c3a
TM		 644 case -NFS4ERR_DELAY:
645 /* The server detected a resend of the RPC call and
646 * returned NFS4ERR_DELAY as per Section 2.10.6.2
647 * of RFC5661.
648 */
df2fabff 649 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 650 __func__,
df2fabff 651 slot->slot_nr,
933602e3 652 slot->seq_nr);
14516c3a 653 goto out_retry;
85563073
TM		 654 case -NFS4ERR_BADSLOT:
655 /*
656 * The slot id we used was probably retired. Try again
657 * using a different slot id.
658 */
e8794440
TM		 659 goto retry_nowait;
660 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 661 /*
662 * Was the last operation on this sequence interrupted?
663 * If so, retry after bumping the sequence number.
664 */
665 if (interrupted) {
666 ++slot->seq_nr;
667 goto retry_nowait;
668 }
e8794440
TM		 669 /*
670 * Could this slot have been previously retired?
671 * If so, then the server may be expecting seq_nr = 1!
672 */
8e63b6a8
TM		 673 if (slot->seq_nr != 1) {
674 slot->seq_nr = 1;
675 goto retry_nowait;
676 }
677 break;
e8794440
TM		 678 case -NFS4ERR_SEQ_FALSE_RETRY:
679 ++slot->seq_nr;
680 goto retry_nowait;
14516c3a
TM		 681 default:
682 /* Just update the slot sequence no. */
933602e3 683 ++slot->seq_nr;
b0df806c
AA		 684 }
685out:
686 /* The session may be reset by one of the error handlers. */
687 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 688 nfs41_sequence_free_slot(res);
a13ce7c6 689out_noaction:
85563073 690 return ret;
e8794440
TM		 691retry_nowait:
692 if (rpc_restart_call_prepare(task)) {
693 task->tk_status = 0;
694 ret = 0;
695 }
696 goto out;
14516c3a 697out_retry:
d05dd4e9 698 if (!rpc_restart_call(task))
14516c3a
TM		 699 goto out;
700 rpc_delay(task, NFS4_POLL_RETRY_MAX);
701 return 0;
b0df806c 702}
f9c96fcc 703EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 704
2c4b131d 705int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 706{
e3725ec0 707 if (res->sr_slot == NULL)
14516c3a 708 return 1;
3bd2384a
CL		 709 if (!res->sr_slot->table->session)
710 return nfs40_sequence_done(task, res);
14516c3a 711 return nfs41_sequence_done(task, res);
df896455 712}
2c4b131d 713EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 714
dc70d7b3 715int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
ce5039c1
AA		 718 struct rpc_task *task)
719{
fbcd4abc
AA		 720 struct nfs4_slot *slot;
721 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 722
723 dprintk("--> %s\n", __func__);
ce5039c1 724 /* slot already allocated? */
dfb4f309 725 if (res->sr_slot != NULL)
d9afbd1b 726 goto out_success;
ce5039c1 727
fbcd4abc
AA		 728 tbl = &session->fc_slot_table;
729
69d206b5
TM		 730 task->tk_timeout = 0;
731
fbcd4abc 732 spin_lock(&tbl->slot_tbl_lock);
774d5f14 733 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 734 !args->sa_privileged) {
0b1c8fc4 735 /* The state manager will wait until the slot table is empty */
0b1c8fc4 736 dprintk("%s session is draining\n", __func__);
7b939a3f 737 goto out_sleep;
689cf5c1
AB		 738 }
739
2dc03b7f 740 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 741 if (IS_ERR(slot)) {
742 /* If out of memory, try again in 1/4 second */
743 if (slot == ERR_PTR(-ENOMEM))
744 task->tk_timeout = HZ >> 2;
fbcd4abc 745 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 746 goto out_sleep;
fbcd4abc
AA		 747 }
748 spin_unlock(&tbl->slot_tbl_lock);
749
2b2fa717 750 args->sa_slot = slot;
fbcd4abc 751
e8d92382 752 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 753 slot->slot_nr, slot->seq_nr);
fbcd4abc 754
dfb4f309 755 res->sr_slot = slot;
8e63b6a8 756 res->sr_timestamp = jiffies;
2a6e26cd 757 res->sr_status_flags = 0;
fbcd4abc
AA		 758 /*
759 * sr_status is only set in decode_sequence, and so will remain
760 * set to 1 if an rpc level failure occurs.
761 */
762 res->sr_status = 1;
2f92ae34 763 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 764out_success:
765 rpc_call_start(task);
ce5039c1 766 return 0;
7b939a3f 767out_sleep:
8fe72bac
TM		 768 /* Privileged tasks are queued with top priority */
769 if (args->sa_privileged)
1e1093c7
TM		 770 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
771 NULL, RPC_PRIORITY_PRIVILEGED);
772 else
773 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 774 spin_unlock(&tbl->slot_tbl_lock);
775 return -EAGAIN;
ce5039c1 776}
dc70d7b3 777EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 778
5a580e0a
CL		 779static int nfs4_setup_sequence(const struct nfs_server *server,
780 struct nfs4_sequence_args *args,
781 struct nfs4_sequence_res *res,
782 struct rpc_task *task)
ce5039c1 783{
035168ab 784 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 785 int ret = 0;
786
3bd2384a 787 if (!session)
cb04ad2a
PT		 788 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
789 args, res, task);
035168ab 790
e8d92382 791 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 792 __func__, session->clp, session, res->sr_slot ?
e8d92382 793 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 794
9d12b216 795 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 796
ce5039c1
AA		 797 dprintk("<-- %s status=%d\n", __func__, ret);
798 return ret;
799}
800
ce5039c1
AA		 801static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
6ba7db34 804 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 805
035168ab
TM		 806 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
807
d9afbd1b 808 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 809}
810
69ab40c4
AA		 811static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
812{
2a3eb2b9 813 struct nfs4_call_sync_data *data = calldata;
69ab40c4 814
14516c3a 815 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 816}
817
17280175 818static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 819 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 820 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 821};
822
3bd2384a
CL		 823#else /* !CONFIG_NFS_V4_1 */
824
9915ea7e
CL		 825static int nfs4_setup_sequence(const struct nfs_server *server,
826 struct nfs4_sequence_args *args,
827 struct nfs4_sequence_res *res,
828 struct rpc_task *task)
829{
cb04ad2a
PT		 830 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
831 args, res, task);
9915ea7e
CL		 832}
833
2c4b131d
PT		 834int nfs4_sequence_done(struct rpc_task *task,
835 struct nfs4_sequence_res *res)
9915ea7e 836{
3bd2384a 837 return nfs40_sequence_done(task, res);
9915ea7e 838}
2c4b131d 839EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 840
841#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 842
843static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
844{
845 struct nfs4_call_sync_data *data = calldata;
846 nfs4_setup_sequence(data->seq_server,
847 data->seq_args, data->seq_res, task);
848}
849
850static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
851{
852 struct nfs4_call_sync_data *data = calldata;
853 nfs4_sequence_done(task, data->seq_res);
854}
855
856static const struct rpc_call_ops nfs40_call_sync_ops = {
857 .rpc_call_prepare = nfs40_call_sync_prepare,
858 .rpc_call_done = nfs40_call_sync_done,
859};
860
7c513058
BS		 861static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
862 struct nfs_server *server,
ce5039c1
AA		 863 struct rpc_message *msg,
864 struct nfs4_sequence_args *args,
8fe72bac 865 struct nfs4_sequence_res *res)
ce5039c1
AA		 866{
867 int ret;
868 struct rpc_task *task;
9915ea7e 869 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 870 struct nfs4_call_sync_data data = {
035168ab 871 .seq_server = server,
ce5039c1
AA		 872 .seq_args = args,
873 .seq_res = res,
ce5039c1
AA		 874 };
875 struct rpc_task_setup task_setup = {
7c513058 876 .rpc_client = clnt,
ce5039c1 877 .rpc_message = msg,
9915ea7e 878 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 879 .callback_data = &data
880 };
881
ce5039c1
AA		 882 task = rpc_run_task(&task_setup);
883 if (IS_ERR(task))
884 ret = PTR_ERR(task);
885 else {
886 ret = task->tk_status;
887 rpc_put_task(task);
888 }
889 return ret;
890}
891
7c513058
BS		 892int nfs4_call_sync(struct rpc_clnt *clnt,
893 struct nfs_server *server,
e73b83f2
BS		 894 struct rpc_message *msg,
895 struct nfs4_sequence_args *args,
896 struct nfs4_sequence_res *res,
897 int cache_reply)
898{
a9c92d6b 899 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 900 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 901}
cccef3b9 902
38478b24 903static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 904{
38478b24 905 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 906
38478b24 907 spin_lock(&dir->i_lock);
359d7d1c 908 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 909 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 910 nfs_force_lookup_revalidate(dir);
a9a4a87a 911 dir->i_version = cinfo->after;
3235b403 912 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 913 nfs_fscache_invalidate(dir);
38478b24 914 spin_unlock(&dir->i_lock);
1da177e4
LT		 915}
916
e56e0b78 917struct nfs4_opendata {
c6d00e63 918 struct kref kref;
e56e0b78
TM		 919 struct nfs_openargs o_arg;
920 struct nfs_openres o_res;
cdd4e68b
TM		 921 struct nfs_open_confirmargs c_arg;
922 struct nfs_open_confirmres c_res;
6926afd1
TM		 923 struct nfs4_string owner_name;
924 struct nfs4_string group_name;
e56e0b78 925 struct nfs_fattr f_attr;
1775fd3e 926 struct nfs4_label *f_label;
e56e0b78 927 struct dentry *dir;
82a2c1b7 928 struct dentry *dentry;
e56e0b78 929 struct nfs4_state_owner *owner;
aac00a8d 930 struct nfs4_state *state;
e56e0b78 931 struct iattr attrs;
26e976a8 932 unsigned long timestamp;
3e309914 933 unsigned int rpc_done : 1;
5bc2afc2 934 unsigned int file_created : 1;
bdeca1b7 935 unsigned int is_recover : 1;
24ac23ab
TM		 936 int rpc_status;
937 int cancelled;
e56e0b78
TM		 938};
939
49f9a0fa
TM		 940static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
941 int err, struct nfs4_exception *exception)
942{
943 if (err != -EINVAL)
944 return false;
945 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
946 return false;
947 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
948 exception->retry = 1;
949 return true;
950}
951
6ae37339
TM		 952static u32
953nfs4_map_atomic_open_share(struct nfs_server *server,
954 fmode_t fmode, int openflags)
955{
956 u32 res = 0;
957
958 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
959 case FMODE_READ:
960 res = NFS4_SHARE_ACCESS_READ;
961 break;
962 case FMODE_WRITE:
963 res = NFS4_SHARE_ACCESS_WRITE;
964 break;
965 case FMODE_READ|FMODE_WRITE:
966 res = NFS4_SHARE_ACCESS_BOTH;
967 }
968 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
969 goto out;
970 /* Want no delegation if we're using O_DIRECT */
971 if (openflags & O_DIRECT)
972 res |= NFS4_SHARE_WANT_NO_DELEG;
973out:
974 return res;
975}
976
49f9a0fa
TM		 977static enum open_claim_type4
978nfs4_map_atomic_open_claim(struct nfs_server *server,
979 enum open_claim_type4 claim)
980{
981 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
982 return claim;
983 switch (claim) {
984 default:
985 return claim;
986 case NFS4_OPEN_CLAIM_FH:
987 return NFS4_OPEN_CLAIM_NULL;
988 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
989 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
990 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
991 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
992 }
993}
2ced46c2
TM		 994
995static void nfs4_init_opendata_res(struct nfs4_opendata *p)
996{
997 p->o_res.f_attr = &p->f_attr;
1775fd3e 998 p->o_res.f_label = p->f_label;
c1d51931
TM		 999 p->o_res.seqid = p->o_arg.seqid;
1000 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1001 p->o_res.server = p->o_arg.server;
5f657530 1002 p->o_res.access_request = p->o_arg.access;
2ced46c2 1003 nfs_fattr_init(&p->f_attr);
6926afd1 1004 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1005}
1006
82a2c1b7 1007static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1008 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1009 const struct iattr *attrs,
1775fd3e 1010 struct nfs4_label *label,
4a1c0893 1011 enum open_claim_type4 claim,
8535b2be 1012 gfp_t gfp_mask)
e56e0b78 1013{
82a2c1b7 1014 struct dentry *parent = dget_parent(dentry);
2b0143b5 1015 struct inode *dir = d_inode(parent);
e56e0b78 1016 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1017 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1018 struct nfs4_opendata *p;
1019
8535b2be 1020 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1021 if (p == NULL)
1022 goto err;
14c43f76
DQ		 1023
1024 p->f_label = nfs4_label_alloc(server, gfp_mask);
1025 if (IS_ERR(p->f_label))
1026 goto err_free_p;
1027
63f5f796
TM		 1028 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1029 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1030 if (IS_ERR(p->o_arg.seqid))
14c43f76 1031 goto err_free_label;
82a2c1b7
AV		 1032 nfs_sb_active(dentry->d_sb);
1033 p->dentry = dget(dentry);
e56e0b78
TM		 1034 p->dir = parent;
1035 p->owner = sp;
1036 atomic_inc(&sp->so_count);
dc0b027d
TM		 1037 p->o_arg.open_flags = flags;
1038 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1039 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1040 fmode, flags);
ae2bb032
WAA		 1041 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1042 * will return permission denied for all bits until close */
1043 if (!(flags & O_EXCL)) {
1044 /* ask server to check for all possible rights as results
1045 * are cached */
1046 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1047 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1048 }
7539bbab 1049 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1050 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1051 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1052 p->o_arg.name = &dentry->d_name;
e56e0b78 1053 p->o_arg.server = server;
aa9c2669 1054 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1055 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1056 p->o_arg.label = label;
49f9a0fa
TM		 1057 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1058 switch (p->o_arg.claim) {
4a1c0893
TM		 1059 case NFS4_OPEN_CLAIM_NULL:
1060 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1061 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1062 p->o_arg.fh = NFS_FH(dir);
1063 break;
1064 case NFS4_OPEN_CLAIM_PREVIOUS:
1065 case NFS4_OPEN_CLAIM_FH:
1066 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1067 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1068 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1069 }
536e43d1 1070 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1071 __u32 verf[2];
d77d76ff 1072
e56e0b78
TM		 1073 p->o_arg.u.attrs = &p->attrs;
1074 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1075
1076 verf[0] = jiffies;
1077 verf[1] = current->pid;
1078 memcpy(p->o_arg.u.verifier.data, verf,
1079 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1080 }
cdd4e68b
TM		 1081 p->c_arg.fh = &p->o_res.fh;
1082 p->c_arg.stateid = &p->o_res.stateid;
1083 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1084 nfs4_init_opendata_res(p);
c6d00e63 1085 kref_init(&p->kref);
e56e0b78 1086 return p;
14c43f76
DQ		 1087
1088err_free_label:
1089 nfs4_label_free(p->f_label);
1090err_free_p:
e56e0b78
TM		 1091 kfree(p);
1092err:
1093 dput(parent);
1094 return NULL;
1095}
1096
c6d00e63 1097static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1098{
c6d00e63
TM		 1099 struct nfs4_opendata *p = container_of(kref,
1100 struct nfs4_opendata, kref);
82a2c1b7 1101 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1102
1103 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1104 if (p->state != NULL)
1105 nfs4_put_open_state(p->state);
c6d00e63 1106 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1107
1108 nfs4_label_free(p->f_label);
1109
c6d00e63 1110 dput(p->dir);
82a2c1b7
AV		 1111 dput(p->dentry);
1112 nfs_sb_deactive(sb);
6926afd1 1113 nfs_fattr_free_names(&p->f_attr);
e911b815 1114 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1115 kfree(p);
1116}
1117
1118static void nfs4_opendata_put(struct nfs4_opendata *p)
1119{
1120 if (p != NULL)
1121 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1122}
1123
06f814a3
TM		 1124static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1125{
06f814a3
TM		 1126 int ret;
1127
06f814a3 1128 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1129 return ret;
1130}
1131
dc0b027d 1132static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1133{
1134 int ret = 0;
dc0b027d 1135
536e43d1 1136 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1137 goto out;
1138 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1139 case FMODE_READ:
88069f77
TM		 1140 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1141 && state->n_rdonly != 0;
6ee41268
TM		 1142 break;
1143 case FMODE_WRITE:
88069f77
TM		 1144 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1145 && state->n_wronly != 0;
6ee41268
TM		 1146 break;
1147 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1148 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1149 && state->n_rdwr != 0;
6ee41268 1150 }
dc0b027d 1151out:
6ee41268
TM		 1152 return ret;
1153}
1154
dc0b027d 1155static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1156{
652f89f6
TM		 1157 if (delegation == NULL)
1158 return 0;
dc0b027d 1159 if ((delegation->type & fmode) != fmode)
aac00a8d 1160 return 0;
d25be546
TM		 1161 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1162 return 0;
b7391f44 1163 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1164 return 1;
1165}
1166
dc0b027d 1167static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1168{
dc0b027d 1169 switch (fmode) {
e7616923
TM		 1170 case FMODE_WRITE:
1171 state->n_wronly++;
1172 break;
1173 case FMODE_READ:
1174 state->n_rdonly++;
1175 break;
1176 case FMODE_READ|FMODE_WRITE:
1177 state->n_rdwr++;
1178 }
dc0b027d 1179 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1180}
1181
4f14c194
TM		 1182static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1183{
1184 struct nfs_client *clp = state->owner->so_server->nfs_client;
1185 bool need_recover = false;
1186
1187 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1188 need_recover = true;
1189 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1190 need_recover = true;
1191 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1192 need_recover = true;
1193 if (need_recover)
1194 nfs4_state_mark_reclaim_nograce(clp, state);
1195}
1196
e999e80e
TM		 1197static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1198 nfs4_stateid *stateid)
1199{
1200 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1201 return true;
4f14c194
TM		 1202 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1203 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1204 return true;
4f14c194 1205 }
e999e80e
TM		 1206 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1207 return true;
1208 return false;
1209}
1210
f95549cf
TM		 1211static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1212{
1213 if (state->n_wronly)
1214 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1215 if (state->n_rdonly)
1216 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1217 if (state->n_rdwr)
1218 set_bit(NFS_O_RDWR_STATE, &state->flags);
1219}
1220
226056c5
TM		 1221static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1222 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1223{
226056c5
TM		 1224 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1225 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1226 case FMODE_WRITE:
1227 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 break;
1229 case FMODE_READ:
1230 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1231 break;
1232 case 0:
1233 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1234 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1235 clear_bit(NFS_OPEN_STATE, &state->flags);
1236 }
1237 if (stateid == NULL)
1238 return;
f95549cf
TM		 1239 /* Handle races with OPEN */
1240 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1241 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1242 nfs_resync_open_stateid_locked(state);
226056c5 1243 return;
f95549cf 1244 }
003707c7 1245 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1246 nfs4_stateid_copy(&state->stateid, stateid);
1247 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1248}
1249
1250static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1251{
1252 write_seqlock(&state->seqlock);
1253 nfs_clear_open_stateid_locked(state, stateid, fmode);
1254 write_sequnlock(&state->seqlock);
4f14c194
TM		 1255 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1256 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1257}
1258
dc0b027d 1259static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1260{
dc0b027d 1261 switch (fmode) {
003707c7
TM		 1262 case FMODE_READ:
1263 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1264 break;
1265 case FMODE_WRITE:
1266 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1267 break;
1268 case FMODE_READ|FMODE_WRITE:
1269 set_bit(NFS_O_RDWR_STATE, &state->flags);
1270 }
e999e80e
TM		 1271 if (!nfs_need_update_open_stateid(state, stateid))
1272 return;
1273 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1274 nfs4_stateid_copy(&state->stateid, stateid);
1275 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1276}
1277
dc0b027d 1278static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1279{
8bda4e4c
TM		 1280 /*
1281 * Protect the call to nfs4_state_set_mode_locked and
1282 * serialise the stateid update
1283 */
1284 write_seqlock(&state->seqlock);
003707c7 1285 if (deleg_stateid != NULL) {
f597c537 1286 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1287 set_bit(NFS_DELEGATED_STATE, &state->flags);
1288 }
1289 if (open_stateid != NULL)
dc0b027d 1290 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1291 write_sequnlock(&state->seqlock);
1292 spin_lock(&state->owner->so_lock);
dc0b027d 1293 update_open_stateflags(state, fmode);
ec073428 1294 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1295}
1296
dc0b027d 1297static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1298{
1299 struct nfs_inode *nfsi = NFS_I(state->inode);
1300 struct nfs_delegation *deleg_cur;
1301 int ret = 0;
1302
dc0b027d 1303 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1304
1305 rcu_read_lock();
1306 deleg_cur = rcu_dereference(nfsi->delegation);
1307 if (deleg_cur == NULL)
1308 goto no_delegation;
1309
1310 spin_lock(&deleg_cur->lock);
17f26b12 1311 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1312 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1313 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1314 goto no_delegation_unlock;
1315
1316 if (delegation == NULL)
1317 delegation = &deleg_cur->stateid;
f597c537 1318 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1319 goto no_delegation_unlock;
1320
b7391f44 1321 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1322 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1323 ret = 1;
1324no_delegation_unlock:
1325 spin_unlock(&deleg_cur->lock);
1326no_delegation:
1327 rcu_read_unlock();
1328
1329 if (!ret && open_stateid != NULL) {
dc0b027d 1330 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1331 ret = 1;
1332 }
4f14c194
TM		 1333 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1334 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1335
1336 return ret;
1337}
1338
39071e6f
TM		 1339static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1340 const nfs4_stateid *stateid)
1341{
1342 struct nfs4_state *state = lsp->ls_state;
1343 bool ret = false;
1344
1345 spin_lock(&state->state_lock);
1346 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1347 goto out_noupdate;
1348 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1349 goto out_noupdate;
1350 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1351 ret = true;
1352out_noupdate:
1353 spin_unlock(&state->state_lock);
1354 return ret;
1355}
34310430 1356
dc0b027d 1357static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1358{
1359 struct nfs_delegation *delegation;
1360
1361 rcu_read_lock();
1362 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1363 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1364 rcu_read_unlock();
1365 return;
1366 }
1367 rcu_read_unlock();
57ec14c5 1368 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1369}
1370
6ee41268 1371static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1372{
1373 struct nfs4_state *state = opendata->state;
1374 struct nfs_inode *nfsi = NFS_I(state->inode);
1375 struct nfs_delegation *delegation;
f448badd 1376 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1377 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1378 nfs4_stateid stateid;
1379 int ret = -EAGAIN;
1380
aac00a8d 1381 for (;;) {
61beef75 1382 spin_lock(&state->owner->so_lock);
dc0b027d 1383 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1384 update_open_stateflags(state, fmode);
6ee41268 1385 spin_unlock(&state->owner->so_lock);
61beef75 1386 goto out_return_state;
6ee41268 1387 }
61beef75 1388 spin_unlock(&state->owner->so_lock);
34310430
TM		 1389 rcu_read_lock();
1390 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1391 if (!can_open_delegated(delegation, fmode)) {
34310430 1392 rcu_read_unlock();
aac00a8d 1393 break;
34310430 1394 }
aac00a8d 1395 /* Save the delegation */
f597c537 1396 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1397 rcu_read_unlock();
fa332941 1398 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1399 if (!opendata->is_recover) {
1400 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1401 if (ret != 0)
1402 goto out;
1403 }
aac00a8d 1404 ret = -EAGAIN;
34310430
TM		 1405
1406 /* Try to update the stateid using the delegation */
dc0b027d 1407 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1408 goto out_return_state;
aac00a8d 1409 }
aac00a8d
TM		 1410out:
1411 return ERR_PTR(ret);
1412out_return_state:
1413 atomic_inc(&state->count);
1414 return state;
1415}
1416
e23008ec
AA		 1417static void
1418nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1419{
1420 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1421 struct nfs_delegation *delegation;
1422 int delegation_flags = 0;
1423
1424 rcu_read_lock();
1425 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1426 if (delegation)
1427 delegation_flags = delegation->flags;
1428 rcu_read_unlock();
1429 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1430 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1431 "returning a delegation for "
1432 "OPEN(CLAIM_DELEGATE_CUR)\n",
1433 clp->cl_hostname);
1434 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1435 nfs_inode_set_delegation(state->inode,
1436 data->owner->so_cred,
1437 &data->o_res);
1438 else
1439 nfs_inode_reclaim_delegation(state->inode,
1440 data->owner->so_cred,
1441 &data->o_res);
1442}
1443
1444/*
1445 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1446 * and update the nfs4_state.
1447 */
1448static struct nfs4_state *
1449_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 struct inode *inode = data->state->inode;
1452 struct nfs4_state *state = data->state;
1453 int ret;
1454
d2bfda2e
WAA		 1455 if (!data->rpc_done) {
1456 if (data->rpc_status) {
1457 ret = data->rpc_status;
1458 goto err;
1459 }
1460 /* cached opens have already been processed */
1461 goto update;
e23008ec
AA		 1462 }
1463
e23008ec
AA		 1464 ret = nfs_refresh_inode(inode, &data->f_attr);
1465 if (ret)
1466 goto err;
1467
1468 if (data->o_res.delegation_type != 0)
1469 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1470update:
e23008ec
AA		 1471 update_open_stateid(state, &data->o_res.stateid, NULL,
1472 data->o_arg.fmode);
d49f042a 1473 atomic_inc(&state->count);
e23008ec
AA		 1474
1475 return state;
1476err:
1477 return ERR_PTR(ret);
1478
1479}
1480
1481static struct nfs4_state *
1482_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1483{
1484 struct inode *inode;
1485 struct nfs4_state *state = NULL;
1b370bc2 1486 int ret;
24ac23ab 1487
aac00a8d 1488 if (!data->rpc_done) {
6ee41268 1489 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1490 goto out;
1491 }
1492
1b370bc2 1493 ret = -EAGAIN;
24ac23ab 1494 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1495 goto err;
1775fd3e 1496 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1497 ret = PTR_ERR(inode);
03f28e3a 1498 if (IS_ERR(inode))
1b370bc2
TM		 1499 goto err;
1500 ret = -ENOMEM;
24ac23ab
TM		 1501 state = nfs4_get_open_state(inode, data->owner);
1502 if (state == NULL)
1b370bc2 1503 goto err_put_inode;
e23008ec
AA		 1504 if (data->o_res.delegation_type != 0)
1505 nfs4_opendata_check_deleg(data, state);
34310430 1506 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1507 data->o_arg.fmode);
24ac23ab 1508 iput(inode);
aac00a8d 1509out:
7aa262b5 1510 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1511 return state;
1b370bc2
TM		 1512err_put_inode:
1513 iput(inode);
1514err:
1515 return ERR_PTR(ret);
24ac23ab
TM		 1516}
1517
e23008ec
AA		 1518static struct nfs4_state *
1519nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1520{
1521 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1522 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1523 return _nfs4_opendata_to_nfs4_state(data);
1524}
1525
864472e9
TM		 1526static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1527{
1528 struct nfs_inode *nfsi = NFS_I(state->inode);
1529 struct nfs_open_context *ctx;
1530
1531 spin_lock(&state->inode->i_lock);
1532 list_for_each_entry(ctx, &nfsi->open_files, list) {
1533 if (ctx->state != state)
1534 continue;
1535 get_nfs_open_context(ctx);
1536 spin_unlock(&state->inode->i_lock);
1537 return ctx;
1538 }
1539 spin_unlock(&state->inode->i_lock);
1540 return ERR_PTR(-ENOENT);
1541}
1542
4a1c0893
TM		 1543static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1544 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1545{
1546 struct nfs4_opendata *opendata;
1547
4a1c0893 1548 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1549 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1550 if (opendata == NULL)
1551 return ERR_PTR(-ENOMEM);
1552 opendata->state = state;
1553 atomic_inc(&state->count);
1554 return opendata;
1555}
1556
dc0b027d 1557static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1558{
2ced46c2 1559 struct nfs4_state *newstate;
864472e9
TM		 1560 int ret;
1561
dc0b027d
TM		 1562 opendata->o_arg.open_flags = 0;
1563 opendata->o_arg.fmode = fmode;
be36e185
TM		 1564 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1565 NFS_SB(opendata->dentry->d_sb),
1566 fmode, 0);
2ced46c2
TM		 1567 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1568 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1569 nfs4_init_opendata_res(opendata);
b257957e 1570 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1571 if (ret != 0)
1572 return ret;
2ced46c2 1573 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1574 if (IS_ERR(newstate))
1575 return PTR_ERR(newstate);
643168c2 1576 nfs4_close_state(newstate, fmode);
2ced46c2 1577 *res = newstate;
864472e9
TM		 1578 return 0;
1579}
1580
1581static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1582{
864472e9 1583 struct nfs4_state *newstate;
864472e9
TM		 1584 int ret;
1585
4f14c194
TM		 1586 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1587 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1588 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1589 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1590 /* memory barrier prior to reading state->n_* */
2ced46c2 1591 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1592 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1593 smp_rmb();
1594 if (state->n_rdwr != 0) {
2ced46c2 1595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1596 if (ret != 0)
1597 return ret;
2ced46c2
TM		 1598 if (newstate != state)
1599 return -ESTALE;
864472e9
TM		 1600 }
1601 if (state->n_wronly != 0) {
2ced46c2 1602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1603 if (ret != 0)
1604 return ret;
2ced46c2
TM		 1605 if (newstate != state)
1606 return -ESTALE;
864472e9
TM		 1607 }
1608 if (state->n_rdonly != 0) {
2ced46c2 1609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1610 if (ret != 0)
1611 return ret;
2ced46c2
TM		 1612 if (newstate != state)
1613 return -ESTALE;
864472e9 1614 }
1ac7e2fd
TM		 1615 /*
1616 * We may have performed cached opens for all three recoveries.
1617 * Check if we need to update the current stateid.
1618 */
1619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1620 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1621 write_seqlock(&state->seqlock);
1ac7e2fd 1622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1623 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1624 write_sequnlock(&state->seqlock);
1ac7e2fd 1625 }
864472e9
TM		 1626 return 0;
1627}
1628
1da177e4
LT		 1629/*
1630 * OPEN_RECLAIM:
1631 * reclaim state on the server after a reboot.
1da177e4 1632 */
539cd03a 1633static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1634{
1ac7e2fd 1635 struct nfs_delegation *delegation;
864472e9 1636 struct nfs4_opendata *opendata;
dc0b027d 1637 fmode_t delegation_type = 0;
1da177e4
LT		 1638 int status;
1639
4a1c0893
TM		 1640 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1641 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1642 if (IS_ERR(opendata))
1643 return PTR_ERR(opendata);
1ac7e2fd
TM		 1644 rcu_read_lock();
1645 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1646 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1647 delegation_type = delegation->type;
1ac7e2fd 1648 rcu_read_unlock();
864472e9
TM		 1649 opendata->o_arg.u.delegation_type = delegation_type;
1650 status = nfs4_open_recover(opendata, state);
c6d00e63 1651 nfs4_opendata_put(opendata);
1da177e4
LT		 1652 return status;
1653}
1654
539cd03a 1655static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1656{
1657 struct nfs_server *server = NFS_SERVER(state->inode);
1658 struct nfs4_exception exception = { };
1659 int err;
1660 do {
539cd03a 1661 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1662 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1663 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1664 continue;
168667c4 1665 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1666 break;
1667 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1668 } while (exception.retry);
1669 return err;
1670}
1671
864472e9
TM		 1672static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1673{
1674 struct nfs_open_context *ctx;
1675 int ret;
1676
1677 ctx = nfs4_state_find_open_context(state);
1678 if (IS_ERR(ctx))
91876b13 1679 return -EAGAIN;
539cd03a 1680 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1681 put_nfs_open_context(ctx);
1682 return ret;
1683}
1684
db4f2e63 1685static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1686{
be76b5b6
TM		 1687 switch (err) {
1688 default:
1689 printk(KERN_ERR "NFS: %s: unhandled error "
1690 "%d.\n", __func__, err);
1691 case 0:
1692 case -ENOENT:
1693 case -ESTALE:
1694 break;
1695 case -NFS4ERR_BADSESSION:
1696 case -NFS4ERR_BADSLOT:
1697 case -NFS4ERR_BAD_HIGH_SLOT:
1698 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1699 case -NFS4ERR_DEADSESSION:
1700 set_bit(NFS_DELEGATED_STATE, &state->flags);
1701 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1702 return -EAGAIN;
1703 case -NFS4ERR_STALE_CLIENTID:
1704 case -NFS4ERR_STALE_STATEID:
1705 set_bit(NFS_DELEGATED_STATE, &state->flags);
1706 case -NFS4ERR_EXPIRED:
1707 /* Don't recall a delegation if it was lost */
1708 nfs4_schedule_lease_recovery(server->nfs_client);
1709 return -EAGAIN;
352297b9
CL		 1710 case -NFS4ERR_MOVED:
1711 nfs4_schedule_migration_recovery(server);
1712 return -EAGAIN;
8ef2f8d4
CL		 1713 case -NFS4ERR_LEASE_MOVED:
1714 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1715 return -EAGAIN;
be76b5b6
TM		 1716 case -NFS4ERR_DELEG_REVOKED:
1717 case -NFS4ERR_ADMIN_REVOKED:
1718 case -NFS4ERR_BAD_STATEID:
db4f2e63 1719 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1720 nfs_inode_find_state_and_recover(state->inode,
1721 stateid);
1722 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1723 return -EAGAIN;
be76b5b6
TM		 1724 case -NFS4ERR_DELAY:
1725 case -NFS4ERR_GRACE:
1726 set_bit(NFS_DELEGATED_STATE, &state->flags);
1727 ssleep(1);
1728 return -EAGAIN;
db4f2e63
TM		 1729 case -ENOMEM:
1730 case -NFS4ERR_DENIED:
1731 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1732 return 0;
be76b5b6 1733 }
1da177e4
LT		 1734 return err;
1735}
1736
db4f2e63
TM		 1737int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1738{
1739 struct nfs_server *server = NFS_SERVER(state->inode);
1740 struct nfs4_opendata *opendata;
1741 int err;
1742
1743 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1744 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1745 if (IS_ERR(opendata))
1746 return PTR_ERR(opendata);
1747 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1748 err = nfs4_open_recover(opendata, state);
1749 nfs4_opendata_put(opendata);
1750 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1751}
1752
be05c860
CL		 1753static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1754{
1755 struct nfs4_opendata *data = calldata;
1756
cb04ad2a
PT		 1757 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1758 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1759}
1760
cdd4e68b
TM		 1761static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1762{
1763 struct nfs4_opendata *data = calldata;
1764
17ead6c8 1765 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1766
cdd4e68b 1767 data->rpc_status = task->tk_status;
26e976a8 1768 if (data->rpc_status == 0) {
f597c537 1769 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1770 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1771 renew_lease(data->o_res.server, data->timestamp);
3e309914 1772 data->rpc_done = 1;
26e976a8 1773 }
cdd4e68b
TM		 1774}
1775
1776static void nfs4_open_confirm_release(void *calldata)
1777{
1778 struct nfs4_opendata *data = calldata;
1779 struct nfs4_state *state = NULL;
1780
1781 /* If this request hasn't been cancelled, do nothing */
1782 if (data->cancelled == 0)
1783 goto out_free;
1784 /* In case of error, no cleanup! */
3e309914 1785 if (!data->rpc_done)
cdd4e68b 1786 goto out_free;
cdd4e68b 1787 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1788 if (!IS_ERR(state))
643168c2 1789 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1790out_free:
c6d00e63 1791 nfs4_opendata_put(data);
cdd4e68b
TM		 1792}
1793
1794static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1795 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1796 .rpc_call_done = nfs4_open_confirm_done,
1797 .rpc_release = nfs4_open_confirm_release,
1798};
1799
1800/*
1801 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1802 */
1803static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1804{
2b0143b5 1805 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1806 struct rpc_task *task;
5138fde0
TM		 1807 struct rpc_message msg = {
1808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1809 .rpc_argp = &data->c_arg,
1810 .rpc_resp = &data->c_res,
1811 .rpc_cred = data->owner->so_cred,
1812 };
c970aa85
TM		 1813 struct rpc_task_setup task_setup_data = {
1814 .rpc_client = server->client,
5138fde0 1815 .rpc_message = &msg,
c970aa85
TM		 1816 .callback_ops = &nfs4_open_confirm_ops,
1817 .callback_data = data,
101070ca 1818 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1819 .flags = RPC_TASK_ASYNC,
1820 };
1da177e4
LT		 1821 int status;
1822
17ead6c8 1823 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1824 kref_get(&data->kref);
3e309914
TM		 1825 data->rpc_done = 0;
1826 data->rpc_status = 0;
5138fde0 1827 data->timestamp = jiffies;
c970aa85 1828 task = rpc_run_task(&task_setup_data);
7a1218a2 1829 if (IS_ERR(task))
cdd4e68b 1830 return PTR_ERR(task);
cdd4e68b
TM		 1831 status = nfs4_wait_for_completion_rpc_task(task);
1832 if (status != 0) {
1833 data->cancelled = 1;
1834 smp_wmb();
1835 } else
1836 status = data->rpc_status;
e6b3c4db 1837 rpc_put_task(task);
1da177e4
LT		 1838 return status;
1839}
1840
24ac23ab 1841static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1842{
24ac23ab
TM		 1843 struct nfs4_opendata *data = calldata;
1844 struct nfs4_state_owner *sp = data->owner;
549b19cc 1845 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1846
24ac23ab 1847 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1848 goto out_wait;
aac00a8d
TM		 1849 /*
1850 * Check if we still need to send an OPEN call, or if we can use
1851 * a delegation instead.
1852 */
1853 if (data->state != NULL) {
1854 struct nfs_delegation *delegation;
1855
dc0b027d 1856 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1857 goto out_no_action;
aac00a8d
TM		 1858 rcu_read_lock();
1859 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1860 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1861 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1862 can_open_delegated(delegation, data->o_arg.fmode))
1863 goto unlock_no_action;
aac00a8d
TM		 1864 rcu_read_unlock();
1865 }
95b72eb0 1866 /* Update client id. */
549b19cc 1867 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1868 switch (data->o_arg.claim) {
1869 case NFS4_OPEN_CLAIM_PREVIOUS:
1870 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1871 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1872 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1873 case NFS4_OPEN_CLAIM_FH:
1874 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1875 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1876 }
26e976a8 1877 data->timestamp = jiffies;
035168ab 1878 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1879 &data->o_arg.seq_args,
2240a9e2
TM		 1880 &data->o_res.seq_res,
1881 task) != 0)
1882 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1883
1884 /* Set the create mode (note dependency on the session type) */
1885 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1886 if (data->o_arg.open_flags & O_EXCL) {
1887 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1888 if (nfs4_has_persistent_session(clp))
1889 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1890 else if (clp->cl_mvops->minor_version > 0)
1891 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1892 }
6ee41268 1893 return;
652f89f6
TM		 1894unlock_no_action:
1895 rcu_read_unlock();
6ee41268
TM		 1896out_no_action:
1897 task->tk_action = NULL;
c8da19b9 1898out_wait:
b75ad4cd 1899 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1900}
1901
24ac23ab
TM		 1902static void nfs4_open_done(struct rpc_task *task, void *calldata)
1903{
1904 struct nfs4_opendata *data = calldata;
1da177e4 1905
24ac23ab 1906 data->rpc_status = task->tk_status;
d898528c 1907
14516c3a
TM		 1908 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1909 return;
d898528c 1910
24ac23ab 1911 if (task->tk_status == 0) {
807d66d8
TM		 1912 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1913 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1914 case S_IFREG:
1915 break;
1916 case S_IFLNK:
24ac23ab 1917 data->rpc_status = -ELOOP;
6f926b5b
TM		 1918 break;
1919 case S_IFDIR:
24ac23ab 1920 data->rpc_status = -EISDIR;
6f926b5b
TM		 1921 break;
1922 default:
24ac23ab 1923 data->rpc_status = -ENOTDIR;
807d66d8 1924 }
6f926b5b 1925 }
26e976a8 1926 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1927 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1928 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1929 }
3e309914 1930 data->rpc_done = 1;
24ac23ab 1931}
6f926b5b 1932
24ac23ab
TM		 1933static void nfs4_open_release(void *calldata)
1934{
1935 struct nfs4_opendata *data = calldata;
1936 struct nfs4_state *state = NULL;
1937
1938 /* If this request hasn't been cancelled, do nothing */
1939 if (data->cancelled == 0)
1940 goto out_free;
1941 /* In case of error, no cleanup! */
3e309914 1942 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1943 goto out_free;
1944 /* In case we need an open_confirm, no cleanup! */
1945 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1946 goto out_free;
24ac23ab 1947 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1948 if (!IS_ERR(state))
643168c2 1949 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1950out_free:
c6d00e63 1951 nfs4_opendata_put(data);
24ac23ab
TM		 1952}
1953
1954static const struct rpc_call_ops nfs4_open_ops = {
1955 .rpc_call_prepare = nfs4_open_prepare,
1956 .rpc_call_done = nfs4_open_done,
1957 .rpc_release = nfs4_open_release,
1958};
1959
b257957e 1960static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1961{
2b0143b5 1962 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1963 struct nfs_server *server = NFS_SERVER(dir);
1964 struct nfs_openargs *o_arg = &data->o_arg;
1965 struct nfs_openres *o_res = &data->o_res;
1966 struct rpc_task *task;
5138fde0
TM		 1967 struct rpc_message msg = {
1968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1969 .rpc_argp = o_arg,
1970 .rpc_resp = o_res,
1971 .rpc_cred = data->owner->so_cred,
1972 };
c970aa85
TM		 1973 struct rpc_task_setup task_setup_data = {
1974 .rpc_client = server->client,
5138fde0 1975 .rpc_message = &msg,
c970aa85
TM		 1976 .callback_ops = &nfs4_open_ops,
1977 .callback_data = data,
101070ca 1978 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1979 .flags = RPC_TASK_ASYNC,
1980 };
24ac23ab
TM		 1981 int status;
1982
a9c92d6b 1983 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1984 kref_get(&data->kref);
3e309914
TM		 1985 data->rpc_done = 0;
1986 data->rpc_status = 0;
2ced46c2 1987 data->cancelled = 0;
bdeca1b7
TM		 1988 data->is_recover = 0;
1989 if (isrecover) {
8fe72bac 1990 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1991 data->is_recover = 1;
1992 }
c970aa85 1993 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1994 if (IS_ERR(task))
1995 return PTR_ERR(task);
1996 status = nfs4_wait_for_completion_rpc_task(task);
1997 if (status != 0) {
1998 data->cancelled = 1;
1999 smp_wmb();
2000 } else
2001 status = data->rpc_status;
2002 rpc_put_task(task);
2003
2004 return status;
2005}
2006
2007static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2008{
2b0143b5 2009 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2010 struct nfs_openres *o_res = &data->o_res;
2011 int status;
2012
2013 status = nfs4_run_open_task(data, 1);
2014 if (status != 0 || !data->rpc_done)
2015 return status;
2016
6926afd1
TM		 2017 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2018
b257957e
AB		 2019 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2020 status = _nfs4_proc_open_confirm(data);
2021 if (status != 0)
2022 return status;
2023 }
2024
2025 return status;
2026}
2027
f3792d63
TM		 2028/*
2029 * Additional permission checks in order to distinguish between an
2030 * open for read, and an open for execute. This works around the
2031 * fact that NFSv4 OPEN treats read and execute permissions as being
2032 * the same.
2033 * Note that in the non-execute case, we want to turn off permission
2034 * checking if we just created a new file (POSIX open() semantics).
2035 */
6168f62c
WAA		 2036static int nfs4_opendata_access(struct rpc_cred *cred,
2037 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2038 struct nfs4_state *state, fmode_t fmode,
2039 int openflags)
6168f62c
WAA		 2040{
2041 struct nfs_access_entry cache;
2042 u32 mask;
2043
2044 /* access call failed or for some reason the server doesn't
2045 * support any access modes -- defer access call until later */
2046 if (opendata->o_res.access_supported == 0)
2047 return 0;
2048
2049 mask = 0;
f3792d63
TM		 2050 /*
2051 * Use openflags to check for exec, because fmode won't
2052 * always have FMODE_EXEC set when file open for exec.
2053 */
f8d9a897
WAA		 2054 if (openflags & __FMODE_EXEC) {
2055 /* ONLY check for exec rights */
2056 mask = MAY_EXEC;
f3792d63 2057 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2058 mask = MAY_READ;
6168f62c
WAA		 2059
2060 cache.cred = cred;
2061 cache.jiffies = jiffies;
2062 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2063 nfs_access_add_cache(state->inode, &cache);
2064
bbd3a8ee 2065 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2066 return 0;
2067
2068 /* even though OPEN succeeded, access is denied. Close the file */
2069 nfs4_close_state(state, fmode);
998f40b5 2070 return -EACCES;
6168f62c
WAA		 2071}
2072
b257957e
AB		 2073/*
2074 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2075 */
2076static int _nfs4_proc_open(struct nfs4_opendata *data)
2077{
2b0143b5 2078 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2079 struct nfs_server *server = NFS_SERVER(dir);
2080 struct nfs_openargs *o_arg = &data->o_arg;
2081 struct nfs_openres *o_res = &data->o_res;
2082 int status;
2083
2084 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2085 if (!data->rpc_done)
2086 return status;
2087 if (status != 0) {
2088 if (status == -NFS4ERR_BADNAME &&
2089 !(o_arg->open_flags & O_CREAT))
2090 return -ENOENT;
24ac23ab 2091 return status;
08ef7bd3 2092 }
24ac23ab 2093
6926afd1
TM		 2094 nfs_fattr_map_and_free_names(server, &data->f_attr);
2095
5bc2afc2 2096 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2097 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2098 if (o_arg->open_flags & O_EXCL)
2099 data->file_created = 1;
2100 else if (o_res->cinfo.before != o_res->cinfo.after)
2101 data->file_created = 1;
2102 }
0df5dd4a
TM		 2103 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2104 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2105 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2106 status = _nfs4_proc_open_confirm(data);
1da177e4 2107 if (status != 0)
24ac23ab 2108 return status;
1da177e4
LT		 2109 }
2110 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2111 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2112 return 0;
1da177e4
LT		 2113}
2114
d83217c1
AA		 2115static int nfs4_recover_expired_lease(struct nfs_server *server)
2116{
2117 return nfs4_client_recover_expired_lease(server->nfs_client);
2118}
2119
1da177e4
LT		 2120/*
2121 * OPEN_EXPIRED:
2122 * reclaim state on the server after a network partition.
2123 * Assumes caller holds the appropriate lock
2124 */
539cd03a 2125static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2126{
e56e0b78 2127 struct nfs4_opendata *opendata;
864472e9 2128 int ret;
1da177e4 2129
4a1c0893 2130 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2131 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2132 if (IS_ERR(opendata))
2133 return PTR_ERR(opendata);
864472e9 2134 ret = nfs4_open_recover(opendata, state);
35d05778 2135 if (ret == -ESTALE)
3d4ff43d 2136 d_drop(ctx->dentry);
c6d00e63 2137 nfs4_opendata_put(opendata);
864472e9 2138 return ret;
1da177e4
LT		 2139}
2140
a9ed2e25 2141static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2142{
539cd03a 2143 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2144 struct nfs4_exception exception = { };
2145 int err;
2146
2147 do {
539cd03a 2148 err = _nfs4_open_expired(ctx, state);
42113a75 2149 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2150 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2151 continue;
a9ed2e25
TM		 2152 switch (err) {
2153 default:
2154 goto out;
2155 case -NFS4ERR_GRACE:
2156 case -NFS4ERR_DELAY:
2157 nfs4_handle_exception(server, err, &exception);
2158 err = 0;
2159 }
202b50dc 2160 } while (exception.retry);
a9ed2e25 2161out:
202b50dc
TM		 2162 return err;
2163}
2164
1da177e4
LT		 2165static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2166{
1da177e4 2167 struct nfs_open_context *ctx;
864472e9 2168 int ret;
1da177e4 2169
864472e9
TM		 2170 ctx = nfs4_state_find_open_context(state);
2171 if (IS_ERR(ctx))
91876b13 2172 return -EAGAIN;
539cd03a 2173 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2174 put_nfs_open_context(ctx);
2175 return ret;
1da177e4
LT		 2176}
2177
4dfd4f7a
TM		 2178static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2179{
2180 nfs_remove_bad_delegation(state->inode);
2181 write_seqlock(&state->seqlock);
2182 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2183 write_sequnlock(&state->seqlock);
2184 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2185}
2186
2187static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2188{
2189 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2190 nfs_finish_clear_delegation_stateid(state);
2191}
2192
2193static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2194{
2195 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2196 nfs40_clear_delegation_stateid(state);
2197 return nfs4_open_expired(sp, state);
2198}
2199
f062eb6c 2200#if defined(CONFIG_NFS_V4_1)
0c116cad 2201static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2202{
f062eb6c 2203 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2204 nfs4_stateid stateid;
ab7cb0df 2205 struct nfs_delegation *delegation;
0c116cad
TM		 2206 struct rpc_cred *cred;
2207 int status;
3e60ffdd 2208
ab7cb0df
TM		 2209 /* Get the delegation credential for use by test/free_stateid */
2210 rcu_read_lock();
2211 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2212 if (delegation == NULL) {
ab7cb0df 2213 rcu_read_unlock();
0c116cad
TM		 2214 return;
2215 }
2216
2217 nfs4_stateid_copy(&stateid, &delegation->stateid);
2218 cred = get_rpccred(delegation->cred);
2219 rcu_read_unlock();
2220 status = nfs41_test_stateid(server, &stateid, cred);
2221 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2222
3e60ffdd
CL		 2223 if (status != NFS_OK) {
2224 /* Free the stateid unless the server explicitly
2225 * informs us the stateid is unrecognized. */
2226 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2227 nfs41_free_stateid(server, &stateid, cred);
2228 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2229 }
ab7cb0df 2230
0c116cad 2231 put_rpccred(cred);
3e60ffdd
CL		 2232}
2233
2234/**
2235 * nfs41_check_open_stateid - possibly free an open stateid
2236 *
2237 * @state: NFSv4 state for an inode
2238 *
2239 * Returns NFS_OK if recovery for this stateid is now finished.
2240 * Otherwise a negative NFS4ERR value is returned.
2241 */
2242static int nfs41_check_open_stateid(struct nfs4_state *state)
2243{
2244 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2245 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2246 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2247 int status;
2248
2249 /* If a state reset has been done, test_stateid is unneeded */
2250 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2251 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2252 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2253 return -NFS4ERR_BAD_STATEID;
2254
ab7cb0df 2255 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2256 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2257 if (status != NFS_OK) {
2258 /* Free the stateid unless the server explicitly
2259 * informs us the stateid is unrecognized. */
2260 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2261 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2262
2263 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2264 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2265 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2266 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2267 }
2268 return status;
2269}
2270
2271static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2272{
eb64cf96 2273 int status;
b01dd1d8 2274
0c116cad 2275 nfs41_check_delegation_stateid(state);
3e60ffdd 2276 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2277 if (status != NFS_OK)
2278 status = nfs4_open_expired(sp, state);
2279 return status;
f062eb6c
BS		 2280}
2281#endif
2282
aa53ed54
JL		 2283/*
2284 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2285 * fields corresponding to attributes that were used to store the verifier.
2286 * Make sure we clobber those fields in the later setattr call
2287 */
2288static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2289{
2290 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2291 !(sattr->ia_valid & ATTR_ATIME_SET))
2292 sattr->ia_valid |= ATTR_ATIME;
2293
2294 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2295 !(sattr->ia_valid & ATTR_MTIME_SET))
2296 sattr->ia_valid |= ATTR_MTIME;
2297}
2298
c21443c2
TM		 2299static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2300 fmode_t fmode,
2301 int flags,
3efb9722 2302 struct nfs_open_context *ctx)
c21443c2
TM		 2303{
2304 struct nfs4_state_owner *sp = opendata->owner;
2305 struct nfs_server *server = sp->so_server;
275bb307 2306 struct dentry *dentry;
c21443c2
TM		 2307 struct nfs4_state *state;
2308 unsigned int seq;
2309 int ret;
2310
2311 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2312
2313 ret = _nfs4_proc_open(opendata);
dca78001 2314 if (ret != 0)
c21443c2
TM		 2315 goto out;
2316
2317 state = nfs4_opendata_to_nfs4_state(opendata);
2318 ret = PTR_ERR(state);
2319 if (IS_ERR(state))
2320 goto out;
2321 if (server->caps & NFS_CAP_POSIX_LOCK)
2322 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2323
275bb307 2324 dentry = opendata->dentry;
2b0143b5 2325 if (d_really_is_negative(dentry)) {
275bb307
TM		 2326 /* FIXME: Is this d_drop() ever needed? */
2327 d_drop(dentry);
2328 dentry = d_add_unique(dentry, igrab(state->inode));
2329 if (dentry == NULL) {
2330 dentry = opendata->dentry;
2331 } else if (dentry != ctx->dentry) {
2332 dput(ctx->dentry);
2333 ctx->dentry = dget(dentry);
2334 }
2335 nfs_set_verifier(dentry,
2b0143b5 2336 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2337 }
2338
c21443c2
TM		 2339 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2340 if (ret != 0)
2341 goto out;
2342
3efb9722 2343 ctx->state = state;
2b0143b5 2344 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2345 nfs_inode_attach_open_context(ctx);
2346 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2347 nfs4_schedule_stateid_recovery(server, state);
2348 }
c21443c2
TM		 2349out:
2350 return ret;
2351}
2352
1da177e4 2353/*
24ac23ab 2354 * Returns a referenced nfs4_state
1da177e4 2355 */
82be417a 2356static int _nfs4_do_open(struct inode *dir,
4197a055 2357 struct nfs_open_context *ctx,
82be417a
AA		 2358 int flags,
2359 struct iattr *sattr,
5bc2afc2
TM		 2360 struct nfs4_label *label,
2361 int *opened)
1da177e4
LT		 2362{
2363 struct nfs4_state_owner *sp;
2364 struct nfs4_state *state = NULL;
2365 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2366 struct nfs4_opendata *opendata;
4197a055
TM		 2367 struct dentry *dentry = ctx->dentry;
2368 struct rpc_cred *cred = ctx->cred;
2369 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2370 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2371 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2372 struct nfs4_label *olabel = NULL;
aac00a8d 2373 int status;
1da177e4
LT		 2374
2375 /* Protect against reboot recovery conflicts */
1da177e4 2376 status = -ENOMEM;
d1e284d5
TM		 2377 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2378 if (sp == NULL) {
1da177e4
LT		 2379 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2380 goto out_err;
2381 }
58d9714a
TM		 2382 status = nfs4_recover_expired_lease(server);
2383 if (status != 0)
b4454fe1 2384 goto err_put_state_owner;
2b0143b5
DH		 2385 if (d_really_is_positive(dentry))
2386 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2387 status = -ENOMEM;
2b0143b5 2388 if (d_really_is_positive(dentry))
49f9a0fa 2389 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2390 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2391 label, claim, GFP_KERNEL);
e56e0b78 2392 if (opendata == NULL)
95d35cb4 2393 goto err_put_state_owner;
1da177e4 2394
14c43f76
DQ		 2395 if (label) {
2396 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2397 if (IS_ERR(olabel)) {
2398 status = PTR_ERR(olabel);
2399 goto err_opendata_put;
2400 }
2401 }
2402
e911b815
TM		 2403 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2404 if (!opendata->f_attr.mdsthreshold) {
2405 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2406 if (!opendata->f_attr.mdsthreshold)
2407 goto err_free_label;
2408 }
1549210f 2409 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2410 }
2b0143b5
DH		 2411 if (d_really_is_positive(dentry))
2412 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2413
3efb9722 2414 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2415 if (status != 0)
14c43f76 2416 goto err_free_label;
3efb9722 2417 state = ctx->state;
6168f62c 2418
549b19cc
TM		 2419 if ((opendata->o_arg.open_flags & O_EXCL) &&
2420 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2421 nfs4_exclusive_attrset(opendata, sattr);
2422
2423 nfs_fattr_init(opendata->o_res.f_attr);
2424 status = nfs4_do_setattr(state->inode, cred,
2425 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2426 state, label, olabel);
2427 if (status == 0) {
f044636d
TM		 2428 nfs_setattr_update_inode(state->inode, sattr,
2429 opendata->o_res.f_attr);
aa9c2669 2430 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2431 }
0ab64e0e 2432 }
5bc2afc2
TM		 2433 if (opendata->file_created)
2434 *opened |= FILE_CREATED;
82be417a 2435
e911b815 2436 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2437 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2438 opendata->f_attr.mdsthreshold = NULL;
2439 }
82be417a 2440
14c43f76
DQ		 2441 nfs4_label_free(olabel);
2442
c6d00e63 2443 nfs4_opendata_put(opendata);
1da177e4 2444 nfs4_put_state_owner(sp);
1da177e4 2445 return 0;
14c43f76
DQ		 2446err_free_label:
2447 nfs4_label_free(olabel);
c6d00e63
TM		 2448err_opendata_put:
2449 nfs4_opendata_put(opendata);
e56e0b78
TM		 2450err_put_state_owner:
2451 nfs4_put_state_owner(sp);
1da177e4 2452out_err:
1da177e4
LT		 2453 return status;
2454}
2455
2456
82be417a 2457static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2458 struct nfs_open_context *ctx,
82be417a
AA		 2459 int flags,
2460 struct iattr *sattr,
5bc2afc2
TM		 2461 struct nfs4_label *label,
2462 int *opened)
1da177e4 2463{
49f9a0fa 2464 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2465 struct nfs4_exception exception = { };
2466 struct nfs4_state *res;
2467 int status;
2468
2469 do {
5bc2afc2 2470 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2471 res = ctx->state;
42113a75 2472 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2473 if (status == 0)
2474 break;
2475 /* NOTE: BAD_SEQID means the server and client disagree about the
2476 * book-keeping w.r.t. state-changing operations
2477 * (OPEN/CLOSE/LOCK/LOCKU...)
2478 * It is actually a sign of a bug on the client or on the server.
2479 *
2480 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2481 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2482 * have unhashed the old state_owner for us, and that we can
2483 * therefore safely retry using a new one. We should still warn
2484 * the user though...
2485 */
2486 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2487 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2488 " returned a bad sequence-id error!\n",
2489 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2490 exception.retry = 1;
2491 continue;
2492 }
550f5747
TM		 2493 /*
2494 * BAD_STATEID on OPEN means that the server cancelled our
2495 * state before it received the OPEN_CONFIRM.
2496 * Recover by retrying the request as per the discussion
2497 * on Page 181 of RFC3530.
2498 */
2499 if (status == -NFS4ERR_BAD_STATEID) {
2500 exception.retry = 1;
2501 continue;
2502 }
aac00a8d
TM		 2503 if (status == -EAGAIN) {
2504 /* We must have found a delegation */
2505 exception.retry = 1;
2506 continue;
2507 }
49f9a0fa
TM		 2508 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2509 continue;
2510 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2511 status, &exception));
2512 } while (exception.retry);
2513 return res;
2514}
2515
659bfcd6
TM		 2516static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2517 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2518 struct nfs4_state *state, struct nfs4_label *ilabel,
2519 struct nfs4_label *olabel)
1da177e4 2520{
3e4f6290 2521 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2522 struct nfs_setattrargs arg = {
3e4f6290 2523 .fh = NFS_FH(inode),
1da177e4
LT		 2524 .iap = sattr,
2525 .server = server,
2526 .bitmask = server->attr_bitmask,
1775fd3e 2527 .label = ilabel,
1da177e4
LT		 2528 };
2529 struct nfs_setattrres res = {
2530 .fattr = fattr,
1775fd3e 2531 .label = olabel,
1da177e4
LT		 2532 .server = server,
2533 };
2534 struct rpc_message msg = {
659bfcd6
TM		 2535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2536 .rpc_argp = &arg,
2537 .rpc_resp = &res,
2538 .rpc_cred = cred,
1da177e4 2539 };
26e976a8 2540 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2541 fmode_t fmode;
2542 bool truncate;
65e4308d 2543 int status;
1da177e4 2544
aa9c2669
DQ		 2545 arg.bitmask = nfs4_bitmask(server, ilabel);
2546 if (ilabel)
2547 arg.bitmask = nfs4_bitmask(server, olabel);
2548
0e574af1 2549 nfs_fattr_init(fattr);
1da177e4 2550
ee3ae84e
TM		 2551 /* Servers should only apply open mode checks for file size changes */
2552 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2553 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2554
2555 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2556 /* Use that stateid */
0418dae1 2557 } else if (truncate && state != NULL) {
2a369153
TM		 2558 struct nfs_lockowner lockowner = {
2559 .l_owner = current->files,
2560 .l_pid = current->tgid,
2561 };
0418dae1
TM		 2562 if (!nfs4_valid_open_stateid(state))
2563 return -EBADF;
2564 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2565 &lockowner) == -EIO)
2566 return -EBADF;
08e9eac4 2567 } else
f597c537 2568 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2569
7c513058 2570 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2571 if (status == 0 && state != NULL)
2572 renew_lease(server, timestamp);
65e4308d 2573 return status;
1da177e4
LT		 2574}
2575
659bfcd6
TM		 2576static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2577 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2578 struct nfs4_state *state, struct nfs4_label *ilabel,
2579 struct nfs4_label *olabel)
1da177e4 2580{
3e4f6290 2581 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2582 struct nfs4_exception exception = {
2583 .state = state,
3114ea7a 2584 .inode = inode,
a1d0b5ee 2585 };
1da177e4
LT		 2586 int err;
2587 do {
1775fd3e 2588 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2589 trace_nfs4_setattr(inode, err);
451146be
TM		 2590 switch (err) {
2591 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2592 if (!(sattr->ia_valid & ATTR_SIZE)) {
2593 pr_warn_once("NFSv4: server %s is incorrectly "
2594 "applying open mode checks to "
2595 "a SETATTR that is not "
2596 "changing file size.\n",
2597 server->nfs_client->cl_hostname);
2598 }
451146be
TM		 2599 if (state && !(state->state & FMODE_WRITE)) {
2600 err = -EBADF;
2601 if (sattr->ia_valid & ATTR_OPEN)
2602 err = -EACCES;
2603 goto out;
2604 }
2605 }
2606 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2607 } while (exception.retry);
451146be 2608out:
1da177e4
LT		 2609 return err;
2610}
2611
2612struct nfs4_closedata {
2613 struct inode *inode;
2614 struct nfs4_state *state;
2615 struct nfs_closeargs arg;
2616 struct nfs_closeres res;
516a6af6 2617 struct nfs_fattr fattr;
26e976a8 2618 unsigned long timestamp;
f7e8917a
FI		 2619 bool roc;
2620 u32 roc_barrier;
1da177e4
LT		 2621};
2622
963d8fe5 2623static void nfs4_free_closedata(void *data)
9512135d 2624{
963d8fe5
TM		 2625 struct nfs4_closedata *calldata = data;
2626 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2627 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2628
f7e8917a
FI		 2629 if (calldata->roc)
2630 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2631 nfs4_put_open_state(calldata->state);
2632 nfs_free_seqid(calldata->arg.seqid);
9512135d 2633 nfs4_put_state_owner(sp);
322b2b90 2634 nfs_sb_deactive(sb);
9512135d
TM		 2635 kfree(calldata);
2636}
2637
963d8fe5 2638static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2639{
963d8fe5 2640 struct nfs4_closedata *calldata = data;
1da177e4 2641 struct nfs4_state *state = calldata->state;
1da177e4 2642 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2643 nfs4_stateid *res_stateid = NULL;
1da177e4 2644
a3ca5651 2645 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2646 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2647 return;
42113a75 2648 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2649 /* hmm. we are done with the inode, and in the process of freeing
2650 * the state_owner. we keep this around to process errors
2651 */
1da177e4
LT		 2652 switch (task->tk_status) {
2653 case 0:
412f6c4c
TM		 2654 res_stateid = &calldata->res.stateid;
2655 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2656 pnfs_roc_set_barrier(state->inode,
2657 calldata->roc_barrier);
26e976a8 2658 renew_lease(server, calldata->timestamp);
412f6c4c 2659 break;
69794ad7 2660 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2661 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2662 case -NFS4ERR_OLD_STATEID:
2663 case -NFS4ERR_BAD_STATEID:
1da177e4 2664 case -NFS4ERR_EXPIRED:
566fcec6 2665 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2666 &state->open_stateid)) {
566fcec6
TM		 2667 rpc_restart_call_prepare(task);
2668 goto out_release;
2669 }
dc0b027d 2670 if (calldata->arg.fmode == 0)
9e33bed5 2671 break;
1da177e4 2672 default:
8478eaa1 2673 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2674 rpc_restart_call_prepare(task);
69794ad7
TM		 2675 goto out_release;
2676 }
1da177e4 2677 }
412f6c4c 2678 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2679out_release:
72211dbe 2680 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2681 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2682 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2683}
2684
4ce70ada 2685static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2686{
4ce70ada 2687 struct nfs4_closedata *calldata = data;
9512135d 2688 struct nfs4_state *state = calldata->state;
7fdab069 2689 struct inode *inode = calldata->inode;
aee7af35 2690 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2691 int call_close = 0;
9512135d 2692
a3ca5651 2693 dprintk("%s: begin!\n", __func__);
963d8fe5 2694 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2695 goto out_wait;
003707c7 2696
88069f77 2697 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2698 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2699 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2700 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2701 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2702 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2703 /* Calculate the change in open mode */
cd9288ff 2704 calldata->arg.fmode = 0;
e7616923 2705 if (state->n_rdwr == 0) {
cd9288ff
TM		 2706 if (state->n_rdonly == 0)
2707 call_close |= is_rdonly;
2708 else if (is_rdonly)
2709 calldata->arg.fmode |= FMODE_READ;
2710 if (state->n_wronly == 0)
2711 call_close |= is_wronly;
2712 else if (is_wronly)
2713 calldata->arg.fmode |= FMODE_WRITE;
2714 } else if (is_rdwr)
2715 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2716
2717 if (calldata->arg.fmode == 0)
2718 call_close |= is_rdwr;
2719
5d422301
TM		 2720 if (!nfs4_valid_open_stateid(state))
2721 call_close = 0;
4cecb76f 2722 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2723
2724 if (!call_close) {
963d8fe5 2725 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2726 goto out_no_action;
9512135d 2727 }
88069f77 2728
f7e8917a 2729 if (calldata->arg.fmode == 0) {
88069f77 2730 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2731 if (calldata->roc &&
b9536ad5
AA		 2732 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2733 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2734 goto out_wait;
b9536ad5 2735 }
f7e8917a 2736 }
6ae37339
TM		 2737 calldata->arg.share_access =
2738 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2739 calldata->arg.fmode, 0);
88069f77 2740
516a6af6 2741 nfs_fattr_init(calldata->res.fattr);
26e976a8 2742 calldata->timestamp = jiffies;
7fdab069 2743 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2744 &calldata->arg.seq_args,
2745 &calldata->res.seq_res,
2240a9e2
TM		 2746 task) != 0)
2747 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2748 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2749 return;
2750out_no_action:
2751 task->tk_action = NULL;
2752out_wait:
2753 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2754}
2755
963d8fe5 2756static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2757 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2758 .rpc_call_done = nfs4_close_done,
2759 .rpc_release = nfs4_free_closedata,
2760};
2761
fe08c546
PT		 2762static bool nfs4_roc(struct inode *inode)
2763{
40dd4b7a 2764 if (!nfs_have_layout(inode))
fe08c546 2765 return false;
fe08c546
PT		 2766 return pnfs_roc(inode);
2767}
2768
1da177e4
LT		 2769/*
2770 * It is possible for data to be read/written from a mem-mapped file
2771 * after the sys_close call (which hits the vfs layer as a flush).
2772 * This means that we can't safely call nfsv4 close on a file until
2773 * the inode is cleared. This in turn means that we are not good
2774 * NFSv4 citizens - we do not indicate to the server to update the file's
2775 * share state even when we are done with one of the three share
2776 * stateid's in the inode.
2777 *
2778 * NOTE: Caller must be holding the sp->so_owner semaphore!
2779 */
1f7977c1 2780int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2781{
4a35bd41 2782 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2783 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2784 struct nfs4_closedata *calldata;
b39e625b
TM		 2785 struct nfs4_state_owner *sp = state->owner;
2786 struct rpc_task *task;
5138fde0
TM		 2787 struct rpc_message msg = {
2788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2789 .rpc_cred = state->owner->so_cred,
2790 };
c970aa85
TM		 2791 struct rpc_task_setup task_setup_data = {
2792 .rpc_client = server->client,
5138fde0 2793 .rpc_message = &msg,
c970aa85 2794 .callback_ops = &nfs4_close_ops,
101070ca 2795 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2796 .flags = RPC_TASK_ASYNC,
2797 };
9512135d 2798 int status = -ENOMEM;
1da177e4 2799
fa940720
WAA		 2800 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2801 &task_setup_data.rpc_client, &msg);
2802
8535b2be 2803 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2804 if (calldata == NULL)
9512135d 2805 goto out;
a9c92d6b 2806 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2807 calldata->inode = state->inode;
1da177e4 2808 calldata->state = state;
4a35bd41 2809 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2810 /* Serialization for the sequence id */
63f5f796
TM		 2811 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2812 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2813 if (IS_ERR(calldata->arg.seqid))
9512135d 2814 goto out_free_calldata;
dc0b027d 2815 calldata->arg.fmode = 0;
a65318bf 2816 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2817 calldata->res.fattr = &calldata->fattr;
c1d51931 2818 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2819 calldata->res.server = server;
fe08c546 2820 calldata->roc = nfs4_roc(state->inode);
643168c2 2821 nfs_sb_active(calldata->inode->i_sb);
9512135d 2822
1174dd1f
TM		 2823 msg.rpc_argp = &calldata->arg;
2824 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2825 task_setup_data.callback_data = calldata;
2826 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2827 if (IS_ERR(task))
2828 return PTR_ERR(task);
a49c3c77
TM		 2829 status = 0;
2830 if (wait)
2831 status = rpc_wait_for_completion_task(task);
b39e625b 2832 rpc_put_task(task);
a49c3c77 2833 return status;
9512135d
TM		 2834out_free_calldata:
2835 kfree(calldata);
2836out:
b39e625b
TM		 2837 nfs4_put_open_state(state);
2838 nfs4_put_state_owner(sp);
9512135d 2839 return status;
1da177e4
LT		 2840}
2841
2b484297 2842static struct inode *
5bc2afc2
TM		 2843nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2844 int open_flags, struct iattr *attr, int *opened)
1da177e4 2845{
1da177e4 2846 struct nfs4_state *state;
aa9c2669
DQ		 2847 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2848
2849 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2850
565277f6 2851 /* Protect against concurrent sillydeletes */
5bc2afc2 2852 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2853
2854 nfs4_label_release_security(label);
2855
f46e0bd3
TM		 2856 if (IS_ERR(state))
2857 return ERR_CAST(state);
275bb307 2858 return state->inode;
1da177e4
LT		 2859}
2860
1185a552 2861static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2862{
2863 if (ctx->state == NULL)
2864 return;
2865 if (is_sync)
643168c2 2866 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2867 else
643168c2 2868 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2869}
1da177e4 2870
b944dba3
TM		 2871#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2872#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2873#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2874
1da177e4
LT		 2875static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2876{
43652ad5
BH		 2877 struct nfs4_server_caps_arg args = {
2878 .fhandle = fhandle,
2879 };
1da177e4
LT		 2880 struct nfs4_server_caps_res res = {};
2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2883 .rpc_argp = &args,
1da177e4
LT		 2884 .rpc_resp = &res,
2885 };
2886 int status;
2887
7c513058 2888 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2889 if (status == 0) {
b944dba3
TM		 2890 /* Sanity check the server answers */
2891 switch (server->nfs_client->cl_minorversion) {
2892 case 0:
2893 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2894 res.attr_bitmask[2] = 0;
2895 break;
2896 case 1:
2897 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2898 break;
2899 case 2:
2900 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2901 }
1da177e4 2902 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2903 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2904 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2905 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2906 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2907 NFS_CAP_CTIME|NFS_CAP_MTIME|
2908 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2909 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2910 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2911 server->caps |= NFS_CAP_ACLS;
2912 if (res.has_links != 0)
2913 server->caps |= NFS_CAP_HARDLINKS;
2914 if (res.has_symlinks != 0)
2915 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2916 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2917 server->caps |= NFS_CAP_FILEID;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2919 server->caps |= NFS_CAP_MODE;
2920 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2921 server->caps |= NFS_CAP_NLINK;
2922 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2923 server->caps |= NFS_CAP_OWNER;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2925 server->caps |= NFS_CAP_OWNER_GROUP;
2926 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2927 server->caps |= NFS_CAP_ATIME;
2928 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2929 server->caps |= NFS_CAP_CTIME;
2930 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2931 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2932#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2933 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2934 server->caps |= NFS_CAP_SECURITY_LABEL;
2935#endif
2936 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2937 sizeof(server->attr_bitmask));
b944dba3 2938 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2939
a65318bf
TM		 2940 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2941 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2942 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2943 server->cache_consistency_bitmask[2] = 0;
1da177e4 2944 server->acl_bitmask = res.acl_bitmask;
264e6351 2945 server->fh_expire_type = res.fh_expire_type;
1da177e4 2946 }
cccef3b9 2947
1da177e4
LT		 2948 return status;
2949}
2950
55a97593 2951int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2952{
2953 struct nfs4_exception exception = { };
2954 int err;
2955 do {
2956 err = nfs4_handle_exception(server,
2957 _nfs4_server_capabilities(server, fhandle),
2958 &exception);
2959 } while (exception.retry);
2960 return err;
2961}
2962
2963static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2964 struct nfs_fsinfo *info)
2965{
aa9c2669 2966 u32 bitmask[3];
1da177e4 2967 struct nfs4_lookup_root_arg args = {
aa9c2669 2968 .bitmask = bitmask,
1da177e4
LT		 2969 };
2970 struct nfs4_lookup_res res = {
2971 .server = server,
0e574af1 2972 .fattr = info->fattr,
1da177e4
LT		 2973 .fh = fhandle,
2974 };
2975 struct rpc_message msg = {
2976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2977 .rpc_argp = &args,
2978 .rpc_resp = &res,
2979 };
008f55d0 2980
aa9c2669
DQ		 2981 bitmask[0] = nfs4_fattr_bitmap[0];
2982 bitmask[1] = nfs4_fattr_bitmap[1];
2983 /*
2984 * Process the label in the upcoming getfattr
2985 */
2986 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2987
0e574af1 2988 nfs_fattr_init(info->fattr);
7c513058 2989 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2990}
2991
2992static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2993 struct nfs_fsinfo *info)
2994{
2995 struct nfs4_exception exception = { };
2996 int err;
2997 do {
fb8a5ba8 2998 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2999 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3000 switch (err) {
3001 case 0:
3002 case -NFS4ERR_WRONGSEC:
05e9cfb4 3003 goto out;
fb8a5ba8
BS		 3004 default:
3005 err = nfs4_handle_exception(server, err, &exception);
3006 }
1da177e4 3007 } while (exception.retry);
05e9cfb4 3008out:
1da177e4
LT		 3009 return err;
3010}
3011
8f70e95f
BS		 3012static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3013 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3014{
c2190661
TM		 3015 struct rpc_auth_create_args auth_args = {
3016 .pseudoflavor = flavor,
3017 };
8f70e95f
BS		 3018 struct rpc_auth *auth;
3019 int ret;
3020
c2190661 3021 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3022 if (IS_ERR(auth)) {
75bc8821 3023 ret = -EACCES;
8f70e95f
BS		 3024 goto out;
3025 }
3026 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3027out:
3028 return ret;
3029}
3030
9a744ba3
CL		 3031/*
3032 * Retry pseudoroot lookup with various security flavors. We do this when:
3033 *
3034 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3035 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3036 *
3037 * Returns zero on success, or a negative NFS4ERR value, or a
3038 * negative errno value.
3039 */
801a16dc 3040static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3041 struct nfs_fsinfo *info)
1da177e4 3042{
9a744ba3
CL		 3043 /* Per 3530bis 15.33.5 */
3044 static const rpc_authflavor_t flav_array[] = {
3045 RPC_AUTH_GSS_KRB5P,
3046 RPC_AUTH_GSS_KRB5I,
3047 RPC_AUTH_GSS_KRB5,
c4eafe11 3048 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3049 RPC_AUTH_NULL,
3050 };
3051 int status = -EPERM;
3052 size_t i;
6a1a1e34 3053
4d4b69dd
WAA		 3054 if (server->auth_info.flavor_len > 0) {
3055 /* try each flavor specified by user */
3056 for (i = 0; i < server->auth_info.flavor_len; i++) {
3057 status = nfs4_lookup_root_sec(server, fhandle, info,
3058 server->auth_info.flavors[i]);
3059 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3060 continue;
3061 break;
3062 }
3063 } else {
3064 /* no flavors specified by user, try default list */
3065 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3066 status = nfs4_lookup_root_sec(server, fhandle, info,
3067 flav_array[i]);
3068 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3069 continue;
3070 break;
3071 }
8f70e95f 3072 }
9a744ba3 3073
fb8a5ba8
BS		 3074 /*
3075 * -EACCESS could mean that the user doesn't have correct permissions
3076 * to access the mount. It could also mean that we tried to mount
3077 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3078 * existing mount programs don't handle -EACCES very well so it should
3079 * be mapped to -EPERM instead.
3080 */
3081 if (status == -EACCES)
3082 status = -EPERM;
801a16dc
BS		 3083 return status;
3084}
3085
2ed4b95b
CL		 3086static int nfs4_do_find_root_sec(struct nfs_server *server,
3087 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3088{
3089 int mv = server->nfs_client->cl_minorversion;
3090 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3091}
3092
3093/**
3094 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3095 * @server: initialized nfs_server handle
3096 * @fhandle: we fill in the pseudo-fs root file handle
3097 * @info: we fill in an FSINFO struct
5e6b1990 3098 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3099 *
3100 * Returns zero on success, or a negative errno.
801a16dc 3101 */
3028eb2b 3102int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3103 struct nfs_fsinfo *info,
3104 bool auth_probe)
801a16dc 3105{
c7757074 3106 int status = 0;
2ed4b95b 3107
c7757074 3108 if (!auth_probe)
5e6b1990 3109 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3110
3111 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3112 status = nfs4_do_find_root_sec(server, fhandle, info);
3113
1da177e4
LT		 3114 if (status == 0)
3115 status = nfs4_server_capabilities(server, fhandle);
3116 if (status == 0)
3117 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3118
c12e87f4 3119 return nfs4_map_errors(status);
1da177e4
LT		 3120}
3121
bae36241
BS		 3122static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3123 struct nfs_fsinfo *info)
3124{
3125 int error;
3126 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3127 struct nfs4_label *label = NULL;
bae36241
BS		 3128
3129 error = nfs4_server_capabilities(server, mntfh);
3130 if (error < 0) {
3131 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3132 return error;
3133 }
3134
14c43f76
DQ		 3135 label = nfs4_label_alloc(server, GFP_KERNEL);
3136 if (IS_ERR(label))
3137 return PTR_ERR(label);
3138
1775fd3e 3139 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3140 if (error < 0) {
3141 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3142 goto err_free_label;
bae36241
BS		 3143 }
3144
3145 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3146 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3147 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3148
14c43f76
DQ		 3149err_free_label:
3150 nfs4_label_free(label);
3151
bae36241
BS		 3152 return error;
3153}
3154
6b97fd3d
MN		 3155/*
3156 * Get locations and (maybe) other attributes of a referral.
3157 * Note that we'll actually follow the referral later when
3158 * we detect fsid mismatch in inode revalidation
3159 */
f05d147f
BS		 3160static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3161 const struct qstr *name, struct nfs_fattr *fattr,
3162 struct nfs_fh *fhandle)
6b97fd3d
MN		 3163{
3164 int status = -ENOMEM;
3165 struct page *page = NULL;
3166 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3167
3168 page = alloc_page(GFP_KERNEL);
3169 if (page == NULL)
3170 goto out;
3171 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3172 if (locations == NULL)
3173 goto out;
3174
f05d147f 3175 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3176 if (status != 0)
3177 goto out;
519ae255
CL		 3178
3179 /*
3180 * If the fsid didn't change, this is a migration event, not a
3181 * referral. Cause us to drop into the exception handler, which
3182 * will kick off migration recovery.
3183 */
6b97fd3d 3184 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3185 dprintk("%s: server did not return a different fsid for"
3186 " a referral at %s\n", __func__, name->name);
519ae255 3187 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3188 goto out;
3189 }
533eb461
AA		 3190 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3191 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3192
533eb461 3193 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3194 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3195 memset(fhandle, 0, sizeof(struct nfs_fh));
3196out:
3197 if (page)
3198 __free_page(page);
5d7ca35a 3199 kfree(locations);
6b97fd3d
MN		 3200 return status;
3201}
3202
1775fd3e
DQ		 3203static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3204 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3205{
3206 struct nfs4_getattr_arg args = {
3207 .fh = fhandle,
3208 .bitmask = server->attr_bitmask,
3209 };
3210 struct nfs4_getattr_res res = {
3211 .fattr = fattr,
1775fd3e 3212 .label = label,
1da177e4
LT		 3213 .server = server,
3214 };
3215 struct rpc_message msg = {
3216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3217 .rpc_argp = &args,
3218 .rpc_resp = &res,
3219 };
aa9c2669
DQ		 3220
3221 args.bitmask = nfs4_bitmask(server, label);
3222
0e574af1 3223 nfs_fattr_init(fattr);
7c513058 3224 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3225}
3226
1775fd3e
DQ		 3227static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3228 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3229{
3230 struct nfs4_exception exception = { };
3231 int err;
3232 do {
b5f875a9
TM		 3233 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3234 trace_nfs4_getattr(server, fhandle, fattr, err);
3235 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3236 &exception);
3237 } while (exception.retry);
3238 return err;
3239}
3240
3241/*
3242 * The file is not closed if it is opened due to the a request to change
3243 * the size of the file. The open call will not be needed once the
3244 * VFS layer lookup-intents are implemented.
3245 *
3246 * Close is called when the inode is destroyed.
3247 * If we haven't opened the file for O_WRONLY, we
3248 * need to in the size_change case to obtain a stateid.
3249 *
3250 * Got race?
3251 * Because OPEN is always done by name in nfsv4, it is
3252 * possible that we opened a different file by the same
3253 * name. We can recognize this race condition, but we
3254 * can't do anything about it besides returning an error.
3255 *
3256 * This will be fixed with VFS changes (lookup-intent).
3257 */
3258static int
3259nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3260 struct iattr *sattr)
3261{
2b0143b5 3262 struct inode *inode = d_inode(dentry);
659bfcd6 3263 struct rpc_cred *cred = NULL;
d530838b 3264 struct nfs4_state *state = NULL;
14c43f76 3265 struct nfs4_label *label = NULL;
1da177e4
LT		 3266 int status;
3267
88ac815c
PT		 3268 if (pnfs_ld_layoutret_on_setattr(inode) &&
3269 sattr->ia_valid & ATTR_SIZE &&
3270 sattr->ia_size < i_size_read(inode))
24028672 3271 pnfs_commit_and_return_layout(inode);
8a1636c4 3272
0e574af1 3273 nfs_fattr_init(fattr);
1da177e4 3274
2669940d
AA		 3275 /* Deal with open(O_TRUNC) */
3276 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3277 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3278
3279 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3280 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3281 return 0;
3282
d530838b 3283 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3284 if (sattr->ia_valid & ATTR_FILE) {
3285 struct nfs_open_context *ctx;
3286
3287 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3288 if (ctx) {
3289 cred = ctx->cred;
3290 state = ctx->state;
3291 }
659bfcd6 3292 }
08e9eac4 3293
14c43f76
DQ		 3294 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3295 if (IS_ERR(label))
3296 return PTR_ERR(label);
3297
3298 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3299 if (status == 0) {
f044636d 3300 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3301 nfs_setsecurity(inode, fattr, label);
3302 }
14c43f76 3303 nfs4_label_free(label);
1da177e4
LT		 3304 return status;
3305}
3306
0c2e53f1
TM		 3307static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3308 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3309 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3310{
0c2e53f1 3311 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3312 int status;
3313 struct nfs4_lookup_arg args = {
3314 .bitmask = server->attr_bitmask,
0c2e53f1 3315 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3316 .name = name,
3317 };
3318 struct nfs4_lookup_res res = {
3319 .server = server,
3320 .fattr = fattr,
aa9c2669 3321 .label = label,
2b3de441
DH		 3322 .fh = fhandle,
3323 };
3324 struct rpc_message msg = {
3325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3326 .rpc_argp = &args,
3327 .rpc_resp = &res,
3328 };
3329
aa9c2669
DQ		 3330 args.bitmask = nfs4_bitmask(server, label);
3331
2b3de441
DH		 3332 nfs_fattr_init(fattr);
3333
1da177e4 3334 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3335 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3336 dprintk("NFS reply lookup: %d\n", status);
3337 return status;
3338}
3339
72de53ec 3340static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3341{
7ebb9315 3342 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3343 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3344 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3345 fattr->nlink = 2;
3346}
3347
72de53ec
BS		 3348static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3349 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3350 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3351{
3352 struct nfs4_exception exception = { };
72de53ec 3353 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3354 int err;
3355 do {
1775fd3e 3356 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3357 trace_nfs4_lookup(dir, name, err);
72de53ec 3358 switch (err) {
08ef7bd3 3359 case -NFS4ERR_BADNAME:
72de53ec
BS		 3360 err = -ENOENT;
3361 goto out;
0c2e53f1 3362 case -NFS4ERR_MOVED:
f05d147f 3363 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3364 if (err == -NFS4ERR_MOVED)
3365 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3366 goto out;
0c2e53f1 3367 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3368 err = -EPERM;
3369 if (client != *clnt)
3370 goto out;
66b06860 3371 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3372 if (IS_ERR(client))
3373 return PTR_ERR(client);
3374
3375 exception.retry = 1;
3376 break;
3377 default:
3378 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3379 }
1da177e4 3380 } while (exception.retry);
72de53ec
BS		 3381
3382out:
3383 if (err == 0)
3384 *clnt = client;
3385 else if (client != *clnt)
3386 rpc_shutdown_client(client);
3387
1da177e4
LT		 3388 return err;
3389}
3390
80a16b21 3391static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3392 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3393 struct nfs4_label *label)
72de53ec
BS		 3394{
3395 int status;
3396 struct rpc_clnt *client = NFS_CLIENT(dir);
3397
1775fd3e 3398 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3399 if (client != NFS_CLIENT(dir)) {
3400 rpc_shutdown_client(client);
3401 nfs_fixup_secinfo_attributes(fattr);
3402 }
3403 return status;
3404}
3405
f05d147f
BS		 3406struct rpc_clnt *
3407nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3408 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3409{
b72888cb 3410 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3411 int status;
f05d147f 3412
1775fd3e 3413 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3414 if (status < 0)
f05d147f 3415 return ERR_PTR(status);
b72888cb 3416 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3417}
3418
1da177e4
LT		 3419static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3420{
76b32999 3421 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3422 struct nfs4_accessargs args = {
3423 .fh = NFS_FH(inode),
a4980e78 3424 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3425 };
3426 struct nfs4_accessres res = {
3427 .server = server,
1da177e4 3428 };
1da177e4
LT		 3429 struct rpc_message msg = {
3430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3431 .rpc_argp = &args,
3432 .rpc_resp = &res,
3433 .rpc_cred = entry->cred,
3434 };
3435 int mode = entry->mask;
aa9c2669 3436 int status = 0;
1da177e4
LT		 3437
3438 /*
3439 * Determine which access bits we want to ask for...
3440 */
3441 if (mode & MAY_READ)
3442 args.access |= NFS4_ACCESS_READ;
3443 if (S_ISDIR(inode->i_mode)) {
3444 if (mode & MAY_WRITE)
3445 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3446 if (mode & MAY_EXEC)
3447 args.access |= NFS4_ACCESS_LOOKUP;
3448 } else {
3449 if (mode & MAY_WRITE)
3450 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3451 if (mode & MAY_EXEC)
3452 args.access |= NFS4_ACCESS_EXECUTE;
3453 }
c407d41a
TM		 3454
3455 res.fattr = nfs_alloc_fattr();
3456 if (res.fattr == NULL)
3457 return -ENOMEM;
3458
7c513058 3459 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3460 if (!status) {
6168f62c 3461 nfs_access_set_mask(entry, res.access);
c407d41a 3462 nfs_refresh_inode(inode, res.fattr);
1da177e4 3463 }
c407d41a 3464 nfs_free_fattr(res.fattr);
1da177e4
LT		 3465 return status;
3466}
3467
3468static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3469{
3470 struct nfs4_exception exception = { };
3471 int err;
3472 do {
c1578b76
TM		 3473 err = _nfs4_proc_access(inode, entry);
3474 trace_nfs4_access(inode, err);
3475 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3476 &exception);
3477 } while (exception.retry);
3478 return err;
3479}
3480
3481/*
3482 * TODO: For the time being, we don't try to get any attributes
3483 * along with any of the zero-copy operations READ, READDIR,
3484 * READLINK, WRITE.
3485 *
3486 * In the case of the first three, we want to put the GETATTR
3487 * after the read-type operation -- this is because it is hard
3488 * to predict the length of a GETATTR response in v4, and thus
3489 * align the READ data correctly. This means that the GETATTR
3490 * may end up partially falling into the page cache, and we should
3491 * shift it into the 'tail' of the xdr_buf before processing.
3492 * To do this efficiently, we need to know the total length
3493 * of data received, which doesn't seem to be available outside
3494 * of the RPC layer.
3495 *
3496 * In the case of WRITE, we also want to put the GETATTR after
3497 * the operation -- in this case because we want to make sure
140150db 3498 * we get the post-operation mtime and size.
1da177e4
LT		 3499 *
3500 * Both of these changes to the XDR layer would in fact be quite
3501 * minor, but I decided to leave them for a subsequent patch.
3502 */
3503static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3504 unsigned int pgbase, unsigned int pglen)
3505{
3506 struct nfs4_readlink args = {
3507 .fh = NFS_FH(inode),
3508 .pgbase = pgbase,
3509 .pglen = pglen,
3510 .pages = &page,
3511 };
f50c7000 3512 struct nfs4_readlink_res res;
1da177e4
LT		 3513 struct rpc_message msg = {
3514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3515 .rpc_argp = &args,
f50c7000 3516 .rpc_resp = &res,
1da177e4
LT		 3517 };
3518
7c513058 3519 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3520}
3521
3522static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3523 unsigned int pgbase, unsigned int pglen)
3524{
3525 struct nfs4_exception exception = { };
3526 int err;
3527 do {
c1578b76
TM		 3528 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3529 trace_nfs4_readlink(inode, err);
3530 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3531 &exception);
3532 } while (exception.retry);
3533 return err;
3534}
3535
1da177e4 3536/*
8867fe58 3537 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3538 */
1da177e4
LT		 3539static int
3540nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3541 int flags)
1da177e4 3542{
aa9c2669 3543 struct nfs4_label l, *ilabel = NULL;
8867fe58 3544 struct nfs_open_context *ctx;
1da177e4 3545 struct nfs4_state *state;
5bc2afc2 3546 int opened = 0;
1da177e4
LT		 3547 int status = 0;
3548
8867fe58
MS		 3549 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3550 if (IS_ERR(ctx))
3551 return PTR_ERR(ctx);
3552
aa9c2669
DQ		 3553 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3554
a8a5da99 3555 sattr->ia_mode &= ~current_umask();
5bc2afc2 3556 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3557 if (IS_ERR(state)) {
3558 status = PTR_ERR(state);
c0204fd2 3559 goto out;
1da177e4 3560 }
1da177e4 3561out:
aa9c2669 3562 nfs4_label_release_security(ilabel);
8867fe58 3563 put_nfs_open_context(ctx);
1da177e4
LT		 3564 return status;
3565}
3566
3567static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3568{
16e42959 3569 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3570 struct nfs_removeargs args = {
1da177e4 3571 .fh = NFS_FH(dir),
26fe5750 3572 .name = *name,
16e42959 3573 };
4fdc17b2 3574 struct nfs_removeres res = {
16e42959 3575 .server = server,
1da177e4 3576 };
1da177e4 3577 struct rpc_message msg = {
4fdc17b2
TM		 3578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3579 .rpc_argp = &args,
3580 .rpc_resp = &res,
1da177e4 3581 };
778d2817 3582 int status;
1da177e4 3583
7c513058 3584 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3585 if (status == 0)
16e42959 3586 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3587 return status;
3588}
3589
3590static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3591{
3592 struct nfs4_exception exception = { };
3593 int err;
3594 do {
078ea3df
TM		 3595 err = _nfs4_proc_remove(dir, name);
3596 trace_nfs4_remove(dir, name, err);
3597 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3598 &exception);
3599 } while (exception.retry);
3600 return err;
3601}
3602
e4eff1a6 3603static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3604{
e4eff1a6
TM		 3605 struct nfs_server *server = NFS_SERVER(dir);
3606 struct nfs_removeargs *args = msg->rpc_argp;
3607 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3608
e4eff1a6 3609 res->server = server;
1da177e4 3610 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3611 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3612
3613 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3614}
3615
34e137cc
BS		 3616static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3617{
d9afbd1b
TM		 3618 nfs4_setup_sequence(NFS_SERVER(data->dir),
3619 &data->args.seq_args,
3620 &data->res.seq_res,
3621 task);
1da177e4
LT		 3622}
3623
e4eff1a6 3624static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3625{
078ea3df
TM		 3626 struct nfs_unlinkdata *data = task->tk_calldata;
3627 struct nfs_removeres *res = &data->res;
e4eff1a6 3628
14516c3a
TM		 3629 if (!nfs4_sequence_done(task, &res->seq_res))
3630 return 0;
8478eaa1
N		 3631 if (nfs4_async_handle_error(task, res->server, NULL,
3632 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3633 return 0;
3634 update_changeattr(dir, &res->cinfo);
e4eff1a6 3635 return 1;
1da177e4
LT		 3636}
3637
d3d4152a
JL		 3638static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3639{
3640 struct nfs_server *server = NFS_SERVER(dir);
3641 struct nfs_renameargs *arg = msg->rpc_argp;
3642 struct nfs_renameres *res = msg->rpc_resp;
3643
3644 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3645 res->server = server;
a9c92d6b 3646 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3647}
3648
c6bfa1a1
BS		 3649static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3650{
d9afbd1b
TM		 3651 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3652 &data->args.seq_args,
3653 &data->res.seq_res,
3654 task);
d3d4152a
JL		 3655}
3656
3657static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3658 struct inode *new_dir)
3659{
fbc6f7c2
TM		 3660 struct nfs_renamedata *data = task->tk_calldata;
3661 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3662
3663 if (!nfs4_sequence_done(task, &res->seq_res))
3664 return 0;
8478eaa1 3665 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3666 return 0;
3667
3668 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3669 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3670 return 1;
3671}
3672
1da177e4
LT		 3673static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3674{
91ba2eee 3675 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3676 struct nfs4_link_arg arg = {
3677 .fh = NFS_FH(inode),
3678 .dir_fh = NFS_FH(dir),
3679 .name = name,
91ba2eee
TM		 3680 .bitmask = server->attr_bitmask,
3681 };
91ba2eee
TM		 3682 struct nfs4_link_res res = {
3683 .server = server,
1775fd3e 3684 .label = NULL,
1da177e4 3685 };
1da177e4
LT		 3686 struct rpc_message msg = {
3687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3688 .rpc_argp = &arg,
91ba2eee 3689 .rpc_resp = &res,
1da177e4 3690 };
136f2627
TM		 3691 int status = -ENOMEM;
3692
3693 res.fattr = nfs_alloc_fattr();
778d2817 3694 if (res.fattr == NULL)
136f2627 3695 goto out;
1da177e4 3696
14c43f76
DQ		 3697 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3698 if (IS_ERR(res.label)) {
3699 status = PTR_ERR(res.label);
3700 goto out;
3701 }
aa9c2669 3702 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3703
7c513058 3704 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3705 if (!status) {
3706 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3707 status = nfs_post_op_update_inode(inode, res.fattr);
3708 if (!status)
3709 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3710 }
14c43f76
DQ		 3711
3712
3713 nfs4_label_free(res.label);
3714
136f2627 3715out:
136f2627 3716 nfs_free_fattr(res.fattr);
1da177e4
LT		 3717 return status;
3718}
3719
3720static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3721{
3722 struct nfs4_exception exception = { };
3723 int err;
3724 do {
3725 err = nfs4_handle_exception(NFS_SERVER(inode),
3726 _nfs4_proc_link(inode, dir, name),
3727 &exception);
3728 } while (exception.retry);
3729 return err;
3730}
3731
57dc9a57
TM		 3732struct nfs4_createdata {
3733 struct rpc_message msg;
3734 struct nfs4_create_arg arg;
3735 struct nfs4_create_res res;
3736 struct nfs_fh fh;
3737 struct nfs_fattr fattr;
1775fd3e 3738 struct nfs4_label *label;
57dc9a57
TM		 3739};
3740
3741static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3742 struct qstr *name, struct iattr *sattr, u32 ftype)
3743{
3744 struct nfs4_createdata *data;
3745
3746 data = kzalloc(sizeof(*data), GFP_KERNEL);
3747 if (data != NULL) {
3748 struct nfs_server *server = NFS_SERVER(dir);
3749
14c43f76
DQ		 3750 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3751 if (IS_ERR(data->label))
3752 goto out_free;
3753
57dc9a57
TM		 3754 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3755 data->msg.rpc_argp = &data->arg;
3756 data->msg.rpc_resp = &data->res;
3757 data->arg.dir_fh = NFS_FH(dir);
3758 data->arg.server = server;
3759 data->arg.name = name;
3760 data->arg.attrs = sattr;
3761 data->arg.ftype = ftype;
aa9c2669 3762 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3763 data->res.server = server;
3764 data->res.fh = &data->fh;
3765 data->res.fattr = &data->fattr;
1775fd3e 3766 data->res.label = data->label;
57dc9a57 3767 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3768 }
3769 return data;
14c43f76
DQ		 3770out_free:
3771 kfree(data);
3772 return NULL;
57dc9a57
TM		 3773}
3774
3775static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3776{
7c513058 3777 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3778 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3779 if (status == 0) {
3780 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3781 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3782 }
3783 return status;
3784}
3785
3786static void nfs4_free_createdata(struct nfs4_createdata *data)
3787{
14c43f76 3788 nfs4_label_free(data->label);
57dc9a57
TM		 3789 kfree(data);
3790}
3791
4f390c15 3792static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3793 struct page *page, unsigned int len, struct iattr *sattr,
3794 struct nfs4_label *label)
1da177e4 3795{
57dc9a57
TM		 3796 struct nfs4_createdata *data;
3797 int status = -ENAMETOOLONG;
1da177e4 3798
94a6d753 3799 if (len > NFS4_MAXPATHLEN)
57dc9a57 3800 goto out;
4f390c15 3801
57dc9a57
TM		 3802 status = -ENOMEM;
3803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3804 if (data == NULL)
3805 goto out;
3806
3807 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3808 data->arg.u.symlink.pages = &page;
3809 data->arg.u.symlink.len = len;
1775fd3e 3810 data->arg.label = label;
1da177e4 3811
57dc9a57
TM		 3812 status = nfs4_do_create(dir, dentry, data);
3813
3814 nfs4_free_createdata(data);
3815out:
1da177e4
LT		 3816 return status;
3817}
3818
4f390c15 3819static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3820 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3821{
3822 struct nfs4_exception exception = { };
aa9c2669 3823 struct nfs4_label l, *label = NULL;
1da177e4 3824 int err;
aa9c2669
DQ		 3825
3826 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3827
1da177e4 3828 do {
078ea3df
TM		 3829 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3830 trace_nfs4_symlink(dir, &dentry->d_name, err);
3831 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3832 &exception);
3833 } while (exception.retry);
aa9c2669
DQ		 3834
3835 nfs4_label_release_security(label);
1da177e4
LT		 3836 return err;
3837}
3838
3839static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3840 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3841{
57dc9a57
TM		 3842 struct nfs4_createdata *data;
3843 int status = -ENOMEM;
1da177e4 3844
57dc9a57
TM		 3845 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3846 if (data == NULL)
3847 goto out;
3848
1775fd3e 3849 data->arg.label = label;
57dc9a57
TM		 3850 status = nfs4_do_create(dir, dentry, data);
3851
3852 nfs4_free_createdata(data);
3853out:
1da177e4
LT		 3854 return status;
3855}
3856
3857static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3858 struct iattr *sattr)
3859{
3860 struct nfs4_exception exception = { };
aa9c2669 3861 struct nfs4_label l, *label = NULL;
1da177e4 3862 int err;
a8a5da99 3863
aa9c2669
DQ		 3864 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3865
a8a5da99 3866 sattr->ia_mode &= ~current_umask();
1da177e4 3867 do {
078ea3df
TM		 3868 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3869 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3870 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3871 &exception);
3872 } while (exception.retry);
aa9c2669
DQ		 3873 nfs4_label_release_security(label);
3874
1da177e4
LT		 3875 return err;
3876}
3877
3878static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3879 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3880{
2b0143b5 3881 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3882 struct nfs4_readdir_arg args = {
3883 .fh = NFS_FH(dir),
56e4ebf8 3884 .pages = pages,
1da177e4
LT		 3885 .pgbase = 0,
3886 .count = count,
2b0143b5 3887 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3888 .plus = plus,
1da177e4
LT		 3889 };
3890 struct nfs4_readdir_res res;
3891 struct rpc_message msg = {
3892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3893 .rpc_argp = &args,
3894 .rpc_resp = &res,
3895 .rpc_cred = cred,
3896 };
3897 int status;
3898
6de1472f
AV		 3899 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3900 dentry,
eadf4598 3901 (unsigned long long)cookie);
c3f52af3 3902 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3903 res.pgbase = args.pgbase;
7c513058 3904 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3905 if (status >= 0) {
c3f52af3 3906 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3907 status += args.pgbase;
3908 }
c4812998
TM		 3909
3910 nfs_invalidate_atime(dir);
3911
3110ff80 3912 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3913 return status;
3914}
3915
3916static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3917 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3918{
3919 struct nfs4_exception exception = { };
3920 int err;
3921 do {
c1578b76
TM		 3922 err = _nfs4_proc_readdir(dentry, cred, cookie,
3923 pages, count, plus);
2b0143b5
DH		 3924 trace_nfs4_readdir(d_inode(dentry), err);
3925 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3926 &exception);
3927 } while (exception.retry);
3928 return err;
3929}
3930
3931static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3932 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3933{
57dc9a57
TM		 3934 struct nfs4_createdata *data;
3935 int mode = sattr->ia_mode;
3936 int status = -ENOMEM;
1da177e4 3937
57dc9a57
TM		 3938 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3939 if (data == NULL)
3940 goto out;
3941
1da177e4 3942 if (S_ISFIFO(mode))
57dc9a57 3943 data->arg.ftype = NF4FIFO;
1da177e4 3944 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3945 data->arg.ftype = NF4BLK;
3946 data->arg.u.device.specdata1 = MAJOR(rdev);
3947 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3948 }
3949 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3950 data->arg.ftype = NF4CHR;
3951 data->arg.u.device.specdata1 = MAJOR(rdev);
3952 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3953 } else if (!S_ISSOCK(mode)) {
3954 status = -EINVAL;
3955 goto out_free;
1da177e4 3956 }
1775fd3e 3957
aa9c2669 3958 data->arg.label = label;
57dc9a57 3959 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3960out_free:
57dc9a57
TM		 3961 nfs4_free_createdata(data);
3962out:
1da177e4
LT		 3963 return status;
3964}
3965
3966static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3967 struct iattr *sattr, dev_t rdev)
3968{
3969 struct nfs4_exception exception = { };
aa9c2669 3970 struct nfs4_label l, *label = NULL;
1da177e4 3971 int err;
a8a5da99 3972
aa9c2669
DQ		 3973 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3974
a8a5da99 3975 sattr->ia_mode &= ~current_umask();
1da177e4 3976 do {
078ea3df
TM		 3977 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3978 trace_nfs4_mknod(dir, &dentry->d_name, err);
3979 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3980 &exception);
3981 } while (exception.retry);
aa9c2669
DQ		 3982
3983 nfs4_label_release_security(label);
3984
1da177e4
LT		 3985 return err;
3986}
3987
3988static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3989 struct nfs_fsstat *fsstat)
3990{
3991 struct nfs4_statfs_arg args = {
3992 .fh = fhandle,
3993 .bitmask = server->attr_bitmask,
3994 };
24ad148a
BH		 3995 struct nfs4_statfs_res res = {
3996 .fsstat = fsstat,
3997 };
1da177e4
LT		 3998 struct rpc_message msg = {
3999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4000 .rpc_argp = &args,
24ad148a 4001 .rpc_resp = &res,
1da177e4
LT		 4002 };
4003
0e574af1 4004 nfs_fattr_init(fsstat->fattr);
7c513058 4005 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4006}
4007
4008static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4009{
4010 struct nfs4_exception exception = { };
4011 int err;
4012 do {
4013 err = nfs4_handle_exception(server,
4014 _nfs4_proc_statfs(server, fhandle, fsstat),
4015 &exception);
4016 } while (exception.retry);
4017 return err;
4018}
4019
4020static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4021 struct nfs_fsinfo *fsinfo)
4022{
4023 struct nfs4_fsinfo_arg args = {
4024 .fh = fhandle,
4025 .bitmask = server->attr_bitmask,
4026 };
3dda5e43
BH		 4027 struct nfs4_fsinfo_res res = {
4028 .fsinfo = fsinfo,
4029 };
1da177e4
LT		 4030 struct rpc_message msg = {
4031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4032 .rpc_argp = &args,
3dda5e43 4033 .rpc_resp = &res,
1da177e4
LT		 4034 };
4035
7c513058 4036 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4037}
4038
4039static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4040{
4041 struct nfs4_exception exception = { };
83ca7f5a 4042 unsigned long now = jiffies;
1da177e4
LT		 4043 int err;
4044
4045 do {
83ca7f5a 4046 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4047 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4048 if (err == 0) {
4049 struct nfs_client *clp = server->nfs_client;
4050
4051 spin_lock(&clp->cl_lock);
4052 clp->cl_lease_time = fsinfo->lease_time * HZ;
4053 clp->cl_last_renewal = now;
4054 spin_unlock(&clp->cl_lock);
4055 break;
4056 }
4057 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4058 } while (exception.retry);
4059 return err;
4060}
4061
4062static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4063{
e38eb650
BS		 4064 int error;
4065
0e574af1 4066 nfs_fattr_init(fsinfo->fattr);
e38eb650 4067 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4068 if (error == 0) {
4069 /* block layout checks this! */
4070 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4071 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4072 }
e38eb650
BS		 4073
4074 return error;
1da177e4
LT		 4075}
4076
4077static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4078 struct nfs_pathconf *pathconf)
4079{
4080 struct nfs4_pathconf_arg args = {
4081 .fh = fhandle,
4082 .bitmask = server->attr_bitmask,
4083 };
d45b2989
BH		 4084 struct nfs4_pathconf_res res = {
4085 .pathconf = pathconf,
4086 };
1da177e4
LT		 4087 struct rpc_message msg = {
4088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4089 .rpc_argp = &args,
d45b2989 4090 .rpc_resp = &res,
1da177e4
LT		 4091 };
4092
4093 /* None of the pathconf attributes are mandatory to implement */
4094 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4095 memset(pathconf, 0, sizeof(*pathconf));
4096 return 0;
4097 }
4098
0e574af1 4099 nfs_fattr_init(pathconf->fattr);
7c513058 4100 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4101}
4102
4103static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4104 struct nfs_pathconf *pathconf)
4105{
4106 struct nfs4_exception exception = { };
4107 int err;
4108
4109 do {
4110 err = nfs4_handle_exception(server,
4111 _nfs4_proc_pathconf(server, fhandle, pathconf),
4112 &exception);
4113 } while (exception.retry);
4114 return err;
4115}
4116
5521abfd 4117int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4118 const struct nfs_open_context *ctx,
4119 const struct nfs_lock_context *l_ctx,
4120 fmode_t fmode)
4121{
4122 const struct nfs_lockowner *lockowner = NULL;
4123
4124 if (l_ctx != NULL)
4125 lockowner = &l_ctx->lockowner;
5521abfd 4126 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4127}
4128EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4129
5521abfd
TM		 4130static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4131 const struct nfs_open_context *ctx,
4132 const struct nfs_lock_context *l_ctx,
4133 fmode_t fmode)
4134{
4135 nfs4_stateid current_stateid;
4136
e1253be0
TM		 4137 /* If the current stateid represents a lost lock, then exit */
4138 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4139 return true;
5521abfd
TM		 4140 return nfs4_stateid_match(stateid, &current_stateid);
4141}
4142
4143static bool nfs4_error_stateid_expired(int err)
4144{
4145 switch (err) {
4146 case -NFS4ERR_DELEG_REVOKED:
4147 case -NFS4ERR_ADMIN_REVOKED:
4148 case -NFS4ERR_BAD_STATEID:
4149 case -NFS4ERR_STALE_STATEID:
4150 case -NFS4ERR_OLD_STATEID:
4151 case -NFS4ERR_OPENMODE:
4152 case -NFS4ERR_EXPIRED:
4153 return true;
4154 }
4155 return false;
4156}
4157
d45f60c6 4158void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4159{
d45f60c6 4160 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4161}
4162
d45f60c6 4163static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4164{
d45f60c6 4165 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4166
d45f60c6
WAA		 4167 trace_nfs4_read(hdr, task->tk_status);
4168 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4169 hdr->args.context->state,
4170 NULL) == -EAGAIN) {
d00c5d43 4171 rpc_restart_call_prepare(task);
ec06c096 4172 return -EAGAIN;
1da177e4 4173 }
8850df99 4174
d45f60c6 4175 __nfs4_read_done_cb(hdr);
1da177e4 4176 if (task->tk_status > 0)
d45f60c6 4177 renew_lease(server, hdr->timestamp);
ec06c096 4178 return 0;
1da177e4
LT		 4179}
4180
5521abfd 4181static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4182 struct nfs_pgio_args *args)
5521abfd
TM		 4183{
4184
4185 if (!nfs4_error_stateid_expired(task->tk_status) ||
4186 nfs4_stateid_is_current(&args->stateid,
4187 args->context,
4188 args->lock_context,
4189 FMODE_READ))
4190 return false;
4191 rpc_restart_call_prepare(task);
4192 return true;
4193}
4194
d45f60c6 4195static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4196{
4197
4198 dprintk("--> %s\n", __func__);
4199
d45f60c6 4200 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4201 return -EAGAIN;
d45f60c6 4202 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4203 return -EAGAIN;
d45f60c6
WAA		 4204 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4205 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4206}
4207
d45f60c6
WAA		 4208static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4209 struct rpc_message *msg)
1da177e4 4210{
d45f60c6
WAA		 4211 hdr->timestamp = jiffies;
4212 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4213 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4214 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4215}
4216
d45f60c6
WAA		 4217static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4218 struct nfs_pgio_header *hdr)
ea7c3303 4219{
d45f60c6
WAA		 4220 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4221 &hdr->args.seq_args,
4222 &hdr->res.seq_res,
9b206149 4223 task))
ef1820f9 4224 return 0;
d45f60c6
WAA		 4225 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4226 hdr->args.lock_context,
4227 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4228 return -EIO;
d45f60c6 4229 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4230 return -EIO;
4231 return 0;
1da177e4
LT		 4232}
4233
d45f60c6
WAA		 4234static int nfs4_write_done_cb(struct rpc_task *task,
4235 struct nfs_pgio_header *hdr)
1da177e4 4236{
d45f60c6 4237 struct inode *inode = hdr->inode;
8478eaa1 4238
d45f60c6
WAA		 4239 trace_nfs4_write(hdr, task->tk_status);
4240 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4241 hdr->args.context->state,
4242 NULL) == -EAGAIN) {
d00c5d43 4243 rpc_restart_call_prepare(task);
788e7a89 4244 return -EAGAIN;
1da177e4 4245 }
4f9838c7 4246 if (task->tk_status >= 0) {
d45f60c6 4247 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4248 nfs_writeback_update_inode(hdr);
4f9838c7 4249 }
788e7a89 4250 return 0;
1da177e4
LT		 4251}
4252
5521abfd 4253static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4254 struct nfs_pgio_args *args)
5521abfd
TM		 4255{
4256
4257 if (!nfs4_error_stateid_expired(task->tk_status) ||
4258 nfs4_stateid_is_current(&args->stateid,
4259 args->context,
4260 args->lock_context,
4261 FMODE_WRITE))
4262 return false;
4263 rpc_restart_call_prepare(task);
4264 return true;
4265}
4266
d45f60c6 4267static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4268{
d45f60c6 4269 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4270 return -EAGAIN;
d45f60c6 4271 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4272 return -EAGAIN;
d45f60c6
WAA		 4273 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4274 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4275}
4276
5a37f851 4277static
d45f60c6 4278bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4279{
5a37f851 4280 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4281 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4282 return false;
4283 /* Otherwise, request attributes if and only if we don't hold
4284 * a delegation
4285 */
011e2a7f 4286 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4287}
a69aef14 4288
d45f60c6
WAA		 4289static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4290 struct rpc_message *msg)
1da177e4 4291{
d45f60c6 4292 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4293
d45f60c6
WAA		 4294 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4295 hdr->args.bitmask = NULL;
4296 hdr->res.fattr = NULL;
7ffd1064 4297 } else
d45f60c6 4298 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4299
d45f60c6
WAA		 4300 if (!hdr->pgio_done_cb)
4301 hdr->pgio_done_cb = nfs4_write_done_cb;
4302 hdr->res.server = server;
4303 hdr->timestamp = jiffies;
1da177e4 4304
bdc7f021 4305 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4306 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4307}
4308
0b7c0153 4309static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4310{
d9afbd1b
TM		 4311 nfs4_setup_sequence(NFS_SERVER(data->inode),
4312 &data->args.seq_args,
4313 &data->res.seq_res,
4314 task);
1da177e4
LT		 4315}
4316
0b7c0153 4317static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4318{
1da177e4 4319 struct inode *inode = data->inode;
14516c3a 4320
cc668ab3 4321 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4322 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4323 NULL, NULL) == -EAGAIN) {
d00c5d43 4324 rpc_restart_call_prepare(task);
788e7a89 4325 return -EAGAIN;
1da177e4 4326 }
788e7a89 4327 return 0;
1da177e4
LT		 4328}
4329
0b7c0153 4330static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4331{
4332 if (!nfs4_sequence_done(task, &data->res.seq_res))
4333 return -EAGAIN;
0b7c0153 4334 return data->commit_done_cb(task, data);
5f452431
FI		 4335}
4336
0b7c0153 4337static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4338{
788e7a89 4339 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4340
0b7c0153
FI		 4341 if (data->commit_done_cb == NULL)
4342 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4343 data->res.server = server;
bdc7f021 4344 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4345 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4346}
4347
9bc4e3ca
CL		 4348struct nfs4_renewdata {
4349 struct nfs_client *client;
4350 unsigned long timestamp;
4351};
4352
1da177e4
LT		 4353/*
4354 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4355 * standalone procedure for queueing an asynchronous RENEW.
4356 */
9bc4e3ca 4357static void nfs4_renew_release(void *calldata)
dc96aef9 4358{
9bc4e3ca
CL		 4359 struct nfs4_renewdata *data = calldata;
4360 struct nfs_client *clp = data->client;
dc96aef9 4361
0851de06
AB		 4362 if (atomic_read(&clp->cl_count) > 1)
4363 nfs4_schedule_state_renewal(clp);
4364 nfs_put_client(clp);
9bc4e3ca 4365 kfree(data);
dc96aef9
AB		 4366}
4367
9bc4e3ca 4368static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4369{
9bc4e3ca
CL		 4370 struct nfs4_renewdata *data = calldata;
4371 struct nfs_client *clp = data->client;
4372 unsigned long timestamp = data->timestamp;
1da177e4 4373
c6d01c6f 4374 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4375 switch (task->tk_status) {
4376 case 0:
4377 break;
4378 case -NFS4ERR_LEASE_MOVED:
4379 nfs4_schedule_lease_moved_recovery(clp);
4380 break;
4381 default:
95baa25c 4382 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4383 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4384 return;
4385 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4386 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4387 return;
4388 }
4389 nfs4_schedule_path_down_recovery(clp);
1da177e4 4390 }
452e9352 4391 do_renew_lease(clp, timestamp);
1da177e4
LT		 4392}
4393
963d8fe5
TM		 4394static const struct rpc_call_ops nfs4_renew_ops = {
4395 .rpc_call_done = nfs4_renew_done,
dc96aef9 4396 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4397};
4398
2f60ea6b 4399static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4400{
4401 struct rpc_message msg = {
4402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4403 .rpc_argp = clp,
b4454fe1 4404 .rpc_cred = cred,
1da177e4 4405 };
9bc4e3ca 4406 struct nfs4_renewdata *data;
1da177e4 4407
2f60ea6b
TM		 4408 if (renew_flags == 0)
4409 return 0;
0851de06
AB		 4410 if (!atomic_inc_not_zero(&clp->cl_count))
4411 return -EIO;
b569ad34 4412 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4413 if (data == NULL)
4414 return -ENOMEM;
4415 data->client = clp;
4416 data->timestamp = jiffies;
bc7a05ca 4417 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4418 &nfs4_renew_ops, data);
1da177e4
LT		 4419}
4420
8534d4ec 4421static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4422{
4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4425 .rpc_argp = clp,
b4454fe1 4426 .rpc_cred = cred,
1da177e4
LT		 4427 };
4428 unsigned long now = jiffies;
4429 int status;
4430
bc7a05ca 4431 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4432 if (status < 0)
4433 return status;
452e9352 4434 do_renew_lease(clp, now);
1da177e4
LT		 4435 return 0;
4436}
4437
aa1870af
BF		 4438static inline int nfs4_server_supports_acls(struct nfs_server *server)
4439{
7dd7d959 4440 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4441}
4442
21f498c2
TM		 4443/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4444 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4445 * the stack.
4446 */
21f498c2 4447#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4448
e9e3d724
NH		 4449static int buf_to_pages_noslab(const void *buf, size_t buflen,
4450 struct page **pages, unsigned int *pgbase)
4451{
4452 struct page *newpage, **spages;
4453 int rc = 0;
4454 size_t len;
4455 spages = pages;
4456
4457 do {
21f498c2 4458 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4459 newpage = alloc_page(GFP_KERNEL);
4460
4461 if (newpage == NULL)
4462 goto unwind;
4463 memcpy(page_address(newpage), buf, len);
4464 buf += len;
4465 buflen -= len;
4466 *pages++ = newpage;
4467 rc++;
4468 } while (buflen != 0);
4469
4470 return rc;
4471
4472unwind:
4473 for(; rc > 0; rc--)
4474 __free_page(spages[rc-1]);
4475 return -ENOMEM;
4476}
4477
e50a1c2e
BF		 4478struct nfs4_cached_acl {
4479 int cached;
4480 size_t len;
3e9d4154 4481 char data[0];
e50a1c2e
BF		 4482};
4483
4484static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4485{
4486 struct nfs_inode *nfsi = NFS_I(inode);
4487
4488 spin_lock(&inode->i_lock);
4489 kfree(nfsi->nfs4_acl);
4490 nfsi->nfs4_acl = acl;
4491 spin_unlock(&inode->i_lock);
4492}
4493
4494static void nfs4_zap_acl_attr(struct inode *inode)
4495{
4496 nfs4_set_cached_acl(inode, NULL);
4497}
4498
4499static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4500{
4501 struct nfs_inode *nfsi = NFS_I(inode);
4502 struct nfs4_cached_acl *acl;
4503 int ret = -ENOENT;
4504
4505 spin_lock(&inode->i_lock);
4506 acl = nfsi->nfs4_acl;
4507 if (acl == NULL)
4508 goto out;
4509 if (buf == NULL) /* user is just asking for length */
4510 goto out_len;
4511 if (acl->cached == 0)
4512 goto out;
4513 ret = -ERANGE; /* see getxattr(2) man page */
4514 if (acl->len > buflen)
4515 goto out;
4516 memcpy(buf, acl->data, acl->len);
4517out_len:
4518 ret = acl->len;
4519out:
4520 spin_unlock(&inode->i_lock);
4521 return ret;
4522}
4523
5794d21e 4524static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4525{
4526 struct nfs4_cached_acl *acl;
b291f1b1 4527 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4528
1f1ea6c2 4529 if (buflen <= PAGE_SIZE) {
b291f1b1 4530 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4531 if (acl == NULL)
4532 goto out;
4533 acl->cached = 1;
5794d21e 4534 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4535 } else {
4536 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4537 if (acl == NULL)
4538 goto out;
4539 acl->cached = 0;
4540 }
4541 acl->len = acl_len;
4542out:
4543 nfs4_set_cached_acl(inode, acl);
4544}
4545
bf118a34
AA		 4546/*
4547 * The getxattr API returns the required buffer length when called with a
4548 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4549 * the required buf. On a NULL buf, we send a page of data to the server
4550 * guessing that the ACL request can be serviced by a page. If so, we cache
4551 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4552 * the cache. If not so, we throw away the page, and cache the required
4553 * length. The next getxattr call will then produce another round trip to
4554 * the server, this time with the input buf of the required size.
4555 */
16b4289c 4556static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4557{
bf118a34 4558 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4559 struct nfs_getaclargs args = {
4560 .fh = NFS_FH(inode),
4561 .acl_pages = pages,
4562 .acl_len = buflen,
4563 };
663c79b3
BH		 4564 struct nfs_getaclres res = {
4565 .acl_len = buflen,
4566 };
aa1870af
BF		 4567 struct rpc_message msg = {
4568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4569 .rpc_argp = &args,
663c79b3 4570 .rpc_resp = &res,
aa1870af 4571 };
21f498c2
TM		 4572 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4573 int ret = -ENOMEM, i;
aa1870af 4574
bf118a34
AA		 4575 /* As long as we're doing a round trip to the server anyway,
4576 * let's be prepared for a page of acl data. */
4577 if (npages == 0)
4578 npages = 1;
21f498c2
TM		 4579 if (npages > ARRAY_SIZE(pages))
4580 return -ERANGE;
5a006899 4581
bf118a34
AA		 4582 for (i = 0; i < npages; i++) {
4583 pages[i] = alloc_page(GFP_KERNEL);
4584 if (!pages[i])
4585 goto out_free;
e50a1c2e 4586 }
5a006899
SP		 4587
4588 /* for decoding across pages */
4589 res.acl_scratch = alloc_page(GFP_KERNEL);
4590 if (!res.acl_scratch)
4591 goto out_free;
4592
bf118a34
AA		 4593 args.acl_len = npages * PAGE_SIZE;
4594 args.acl_pgbase = 0;
5a006899 4595
de040bec 4596 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4597 __func__, buf, buflen, npages, args.acl_len);
4598 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4599 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4600 if (ret)
4601 goto out_free;
bf118a34 4602
1f1ea6c2
TM		 4603 /* Handle the case where the passed-in buffer is too short */
4604 if (res.acl_flags & NFS4_ACL_TRUNC) {
4605 /* Did the user only issue a request for the acl length? */
4606 if (buf == NULL)
4607 goto out_ok;
e50a1c2e 4608 ret = -ERANGE;
1f1ea6c2 4609 goto out_free;
e50a1c2e 4610 }
1f1ea6c2 4611 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4612 if (buf) {
4613 if (res.acl_len > buflen) {
4614 ret = -ERANGE;
4615 goto out_free;
4616 }
1f1ea6c2 4617 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4618 }
1f1ea6c2
TM		 4619out_ok:
4620 ret = res.acl_len;
e50a1c2e 4621out_free:
bf118a34
AA		 4622 for (i = 0; i < npages; i++)
4623 if (pages[i])
4624 __free_page(pages[i]);
331818f1
TM		 4625 if (res.acl_scratch)
4626 __free_page(res.acl_scratch);
aa1870af
BF		 4627 return ret;
4628}
4629
16b4289c
TM		 4630static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4631{
4632 struct nfs4_exception exception = { };
4633 ssize_t ret;
4634 do {
4635 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4636 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4637 if (ret >= 0)
4638 break;
4639 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4640 } while (exception.retry);
4641 return ret;
4642}
4643
e50a1c2e
BF		 4644static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4645{
4646 struct nfs_server *server = NFS_SERVER(inode);
4647 int ret;
4648
4649 if (!nfs4_server_supports_acls(server))
4650 return -EOPNOTSUPP;
4651 ret = nfs_revalidate_inode(server, inode);
4652 if (ret < 0)
4653 return ret;
08a22b39
AK		 4654 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4655 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4656 ret = nfs4_read_cached_acl(inode, buf, buflen);
4657 if (ret != -ENOENT)
bf118a34
AA		 4658 /* -ENOENT is returned if there is no ACL or if there is an ACL
4659 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4660 return ret;
4661 return nfs4_get_acl_uncached(inode, buf, buflen);
4662}
4663
16b4289c 4664static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4665{
4666 struct nfs_server *server = NFS_SERVER(inode);
4667 struct page *pages[NFS4ACL_MAXPAGES];
4668 struct nfs_setaclargs arg = {
4669 .fh = NFS_FH(inode),
4670 .acl_pages = pages,
4671 .acl_len = buflen,
4672 };
73c403a9 4673 struct nfs_setaclres res;
4b580ee3
BF		 4674 struct rpc_message msg = {
4675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4676 .rpc_argp = &arg,
73c403a9 4677 .rpc_resp = &res,
4b580ee3 4678 };
21f498c2 4679 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4680 int ret, i;
4b580ee3
BF		 4681
4682 if (!nfs4_server_supports_acls(server))
4683 return -EOPNOTSUPP;
21f498c2
TM		 4684 if (npages > ARRAY_SIZE(pages))
4685 return -ERANGE;
e9e3d724
NH		 4686 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4687 if (i < 0)
4688 return i;
57ec14c5 4689 nfs4_inode_return_delegation(inode);
7c513058 4690 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4691
4692 /*
4693 * Free each page after tx, so the only ref left is
4694 * held by the network stack
4695 */
4696 for (; i > 0; i--)
4697 put_page(pages[i-1]);
4698
08a22b39
AK		 4699 /*
4700 * Acl update can result in inode attribute update.
4701 * so mark the attribute cache invalid.
4702 */
4703 spin_lock(&inode->i_lock);
4704 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4705 spin_unlock(&inode->i_lock);
f41f7418
TM		 4706 nfs_access_zap_cache(inode);
4707 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4708 return ret;
4709}
4710
16b4289c
TM		 4711static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4712{
4713 struct nfs4_exception exception = { };
4714 int err;
4715 do {
c1578b76
TM		 4716 err = __nfs4_proc_set_acl(inode, buf, buflen);
4717 trace_nfs4_set_acl(inode, err);
4718 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4719 &exception);
4720 } while (exception.retry);
4721 return err;
4722}
4723
aa9c2669
DQ		 4724#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4725static int _nfs4_get_security_label(struct inode *inode, void *buf,
4726 size_t buflen)
4727{
4728 struct nfs_server *server = NFS_SERVER(inode);
4729 struct nfs_fattr fattr;
4730 struct nfs4_label label = {0, 0, buflen, buf};
4731
4732 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4733 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4734 .fh = NFS_FH(inode),
4735 .bitmask = bitmask,
4736 };
4737 struct nfs4_getattr_res res = {
4738 .fattr = &fattr,
4739 .label = &label,
4740 .server = server,
4741 };
4742 struct rpc_message msg = {
4743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4744 .rpc_argp = &arg,
aa9c2669
DQ		 4745 .rpc_resp = &res,
4746 };
4747 int ret;
4748
4749 nfs_fattr_init(&fattr);
4750
fcb63a9b 4751 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4752 if (ret)
4753 return ret;
4754 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4755 return -ENOENT;
4756 if (buflen < label.len)
4757 return -ERANGE;
4758 return 0;
4759}
4760
4761static int nfs4_get_security_label(struct inode *inode, void *buf,
4762 size_t buflen)
4763{
4764 struct nfs4_exception exception = { };
4765 int err;
4766
4767 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4768 return -EOPNOTSUPP;
4769
4770 do {
c1578b76
TM		 4771 err = _nfs4_get_security_label(inode, buf, buflen);
4772 trace_nfs4_get_security_label(inode, err);
4773 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4774 &exception);
4775 } while (exception.retry);
4776 return err;
4777}
4778
4779static int _nfs4_do_set_security_label(struct inode *inode,
4780 struct nfs4_label *ilabel,
4781 struct nfs_fattr *fattr,
4782 struct nfs4_label *olabel)
4783{
4784
4785 struct iattr sattr = {0};
4786 struct nfs_server *server = NFS_SERVER(inode);
4787 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4788 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4789 .fh = NFS_FH(inode),
4790 .iap = &sattr,
4791 .server = server,
4792 .bitmask = bitmask,
4793 .label = ilabel,
4794 };
4795 struct nfs_setattrres res = {
4796 .fattr = fattr,
4797 .label = olabel,
4798 .server = server,
4799 };
4800 struct rpc_message msg = {
4801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4802 .rpc_argp = &arg,
aa9c2669
DQ		 4803 .rpc_resp = &res,
4804 };
4805 int status;
4806
12207f69 4807 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4808
12207f69 4809 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4810 if (status)
4811 dprintk("%s failed: %d\n", __func__, status);
4812
4813 return status;
4814}
4815
4816static int nfs4_do_set_security_label(struct inode *inode,
4817 struct nfs4_label *ilabel,
4818 struct nfs_fattr *fattr,
4819 struct nfs4_label *olabel)
4820{
4821 struct nfs4_exception exception = { };
4822 int err;
4823
4824 do {
c1578b76
TM		 4825 err = _nfs4_do_set_security_label(inode, ilabel,
4826 fattr, olabel);
4827 trace_nfs4_set_security_label(inode, err);
4828 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4829 &exception);
4830 } while (exception.retry);
4831 return err;
4832}
4833
4834static int
4835nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4836{
4837 struct nfs4_label ilabel, *olabel = NULL;
4838 struct nfs_fattr fattr;
4839 struct rpc_cred *cred;
2b0143b5 4840 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4841 int status;
4842
4843 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4844 return -EOPNOTSUPP;
4845
4846 nfs_fattr_init(&fattr);
4847
4848 ilabel.pi = 0;
4849 ilabel.lfs = 0;
4850 ilabel.label = (char *)buf;
4851 ilabel.len = buflen;
4852
4853 cred = rpc_lookup_cred();
4854 if (IS_ERR(cred))
4855 return PTR_ERR(cred);
4856
4857 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4858 if (IS_ERR(olabel)) {
4859 status = -PTR_ERR(olabel);
4860 goto out;
4861 }
4862
4863 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4864 if (status == 0)
4865 nfs_setsecurity(inode, &fattr, olabel);
4866
4867 nfs4_label_free(olabel);
4868out:
4869 put_rpccred(cred);
4870 return status;
4871}
4872#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4873
4874
1da177e4 4875static int
8478eaa1
N		 4876nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4877 struct nfs4_state *state, long *timeout)
1da177e4 4878{
aa5190d0
TM		 4879 struct nfs_client *clp = server->nfs_client;
4880
4881 if (task->tk_status >= 0)
1da177e4
LT		 4882 return 0;
4883 switch(task->tk_status) {
a1d0b5ee 4884 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4885 case -NFS4ERR_ADMIN_REVOKED:
4886 case -NFS4ERR_BAD_STATEID:
4887 case -NFS4ERR_OPENMODE:
4888 if (state == NULL)
4889 break;
5d422301 4890 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4891 goto recovery_failed;
0400a6b0 4892 goto wait_on_recovery;
0ced63d1 4893 case -NFS4ERR_EXPIRED:
5d422301
TM		 4894 if (state != NULL) {
4895 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4896 goto recovery_failed;
5d422301 4897 }
1da177e4 4898 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4899 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4900 nfs4_schedule_lease_recovery(clp);
4901 goto wait_on_recovery;
519ae255
CL		 4902 case -NFS4ERR_MOVED:
4903 if (nfs4_schedule_migration_recovery(server) < 0)
4904 goto recovery_failed;
4905 goto wait_on_recovery;
8ef2f8d4
CL		 4906 case -NFS4ERR_LEASE_MOVED:
4907 nfs4_schedule_lease_moved_recovery(clp);
4908 goto wait_on_recovery;
4745e315
AA		 4909#if defined(CONFIG_NFS_V4_1)
4910 case -NFS4ERR_BADSESSION:
4911 case -NFS4ERR_BADSLOT:
4912 case -NFS4ERR_BAD_HIGH_SLOT:
4913 case -NFS4ERR_DEADSESSION:
4914 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4915 case -NFS4ERR_SEQ_FALSE_RETRY:
4916 case -NFS4ERR_SEQ_MISORDERED:
4917 dprintk("%s ERROR %d, Reset session\n", __func__,
4918 task->tk_status);
9f594791 4919 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4920 goto wait_on_recovery;
4745e315 4921#endif /* CONFIG_NFS_V4_1 */
1da177e4 4922 case -NFS4ERR_DELAY:
aa5190d0 4923 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4924 rpc_delay(task, nfs4_update_delay(timeout));
4925 goto restart_call;
006ea73e 4926 case -NFS4ERR_GRACE:
1da177e4 4927 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4928 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4929 case -NFS4ERR_OLD_STATEID:
f1478c13 4930 goto restart_call;
1da177e4
LT		 4931 }
4932 task->tk_status = nfs4_map_errors(task->tk_status);
4933 return 0;
9f51a78e 4934recovery_failed:
5d422301
TM		 4935 task->tk_status = -EIO;
4936 return 0;
0400a6b0 4937wait_on_recovery:
a2c0b9e2 4938 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4939 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4940 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4941 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4942 goto recovery_failed;
f1478c13 4943restart_call:
a2c0b9e2
TM		 4944 task->tk_status = 0;
4945 return -EAGAIN;
1da177e4
LT		 4946}
4947
f092075d
CL		 4948static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4949 nfs4_verifier *bootverf)
cd93710e
CL		 4950{
4951 __be32 verf[2];
4952
2c820d9a
CL		 4953 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4954 /* An impossible timestamp guarantees this value
4955 * will never match a generated boot time. */
4956 verf[0] = 0;
17f26b12 4957 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4958 } else {
f092075d 4959 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4960 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4961 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4962 }
cd93710e
CL		 4963 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4964}
4965
a3192688
JL		 4966static int
4967nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4968{
a3192688
JL		 4969 int result;
4970 size_t len;
4971 char *str;
4972 bool retried = false;
e984a55a 4973
ceb3a16c 4974 if (clp->cl_owner_id != NULL)
a3192688
JL		 4975 return 0;
4976retry:
4977 rcu_read_lock();
4978 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4979 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4980 1 +
4981 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4982 1;
4983 rcu_read_unlock();
4984
4985 if (len > NFS4_OPAQUE_LIMIT + 1)
4986 return -EINVAL;
4987
4988 /*
4989 * Since this string is allocated at mount time, and held until the
4990 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4991 * about a memory-reclaim deadlock.
4992 */
4993 str = kmalloc(len, GFP_KERNEL);
4994 if (!str)
4995 return -ENOMEM;
ceb3a16c 4996
e984a55a 4997 rcu_read_lock();
a3192688
JL		 4998 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
4999 clp->cl_ipaddr,
5000 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5001 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5002 rcu_read_unlock();
a3192688
JL		 5003
5004 /* Did something change? */
5005 if (result >= len) {
5006 kfree(str);
5007 if (retried)
5008 return -EINVAL;
5009 retried = true;
5010 goto retry;
5011 }
5012 clp->cl_owner_id = str;
5013 return 0;
e984a55a
CL		 5014}
5015
873e3851
JL		 5016static int
5017nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5018{
5019 int result;
5020 size_t len;
5021 char *str;
5022
5023 len = 10 + 10 + 1 + 10 + 1 +
5024 strlen(nfs4_client_id_uniquifier) + 1 +
5025 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5026
5027 if (len > NFS4_OPAQUE_LIMIT + 1)
5028 return -EINVAL;
5029
5030 /*
5031 * Since this string is allocated at mount time, and held until the
5032 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5033 * about a memory-reclaim deadlock.
5034 */
5035 str = kmalloc(len, GFP_KERNEL);
5036 if (!str)
5037 return -ENOMEM;
5038
5039 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5040 clp->rpc_ops->version, clp->cl_minorversion,
5041 nfs4_client_id_uniquifier,
5042 clp->cl_rpcclient->cl_nodename);
5043 if (result >= len) {
5044 kfree(str);
5045 return -EINVAL;
5046 }
5047 clp->cl_owner_id = str;
5048 return 0;
5049}
5050
5051static int
5052nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5053{
873e3851
JL		 5054 int result;
5055 size_t len;
5056 char *str;
ceb3a16c
TM		 5057
5058 if (clp->cl_owner_id != NULL)
873e3851 5059 return 0;
6f2ea7f2
CL		 5060
5061 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5062 return nfs4_init_uniquifier_client_string(clp);
5063
5064 len = 10 + 10 + 1 + 10 + 1 +
5065 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5066
5067 if (len > NFS4_OPAQUE_LIMIT + 1)
5068 return -EINVAL;
5069
5070 /*
5071 * Since this string is allocated at mount time, and held until the
5072 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5073 * about a memory-reclaim deadlock.
5074 */
5075 str = kmalloc(len, GFP_KERNEL);
5076 if (!str)
5077 return -ENOMEM;
5078
5079 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5080 clp->rpc_ops->version, clp->cl_minorversion,
5081 clp->cl_rpcclient->cl_nodename);
5082 if (result >= len) {
5083 kfree(str);
5084 return -EINVAL;
5085 }
5086 clp->cl_owner_id = str;
5087 return 0;
e984a55a
CL		 5088}
5089
706cb8db
CL		 5090/*
5091 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5092 * services. Advertise one based on the address family of the
5093 * clientaddr.
5094 */
5095static unsigned int
5096nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5097{
5098 if (strchr(clp->cl_ipaddr, ':') != NULL)
5099 return scnprintf(buf, len, "tcp6");
5100 else
5101 return scnprintf(buf, len, "tcp");
5102}
5103
f11b2a1c
JL		 5104static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5105{
5106 struct nfs4_setclientid *sc = calldata;
5107
5108 if (task->tk_status == 0)
5109 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5110}
5111
5112static const struct rpc_call_ops nfs4_setclientid_ops = {
5113 .rpc_call_done = nfs4_setclientid_done,
5114};
5115
6bbb4ae8
CL		 5116/**
5117 * nfs4_proc_setclientid - Negotiate client ID
5118 * @clp: state data structure
5119 * @program: RPC program for NFSv4 callback service
5120 * @port: IP port number for NFS4 callback service
5121 * @cred: RPC credential to use for this call
5122 * @res: where to place the result
5123 *
5124 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5125 */
bb8b27e5
TM		 5126int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5127 unsigned short port, struct rpc_cred *cred,
5128 struct nfs4_setclientid_res *res)
1da177e4
LT		 5129{
5130 nfs4_verifier sc_verifier;
5131 struct nfs4_setclientid setclientid = {
5132 .sc_verifier = &sc_verifier,
5133 .sc_prog = program,
3a6bb738 5134 .sc_clnt = clp,
1da177e4
LT		 5135 };
5136 struct rpc_message msg = {
5137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5138 .rpc_argp = &setclientid,
bb8b27e5 5139 .rpc_resp = res,
286d7d6a 5140 .rpc_cred = cred,
1da177e4 5141 };
f11b2a1c
JL		 5142 struct rpc_task *task;
5143 struct rpc_task_setup task_setup_data = {
5144 .rpc_client = clp->cl_rpcclient,
5145 .rpc_message = &msg,
5146 .callback_ops = &nfs4_setclientid_ops,
5147 .callback_data = &setclientid,
5148 .flags = RPC_TASK_TIMEOUT,
5149 };
6bbb4ae8 5150 int status;
1da177e4 5151
de734831 5152 /* nfs_client_id4 */
f092075d 5153 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5154
5155 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5156 status = nfs4_init_uniform_client_string(clp);
5157 else
a3192688 5158 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5159
5160 if (status)
5161 goto out;
3a6bb738 5162
de734831 5163 /* cb_client4 */
706cb8db
CL		 5164 setclientid.sc_netid_len =
5165 nfs4_init_callback_netid(clp,
5166 setclientid.sc_netid,
5167 sizeof(setclientid.sc_netid));
de734831 5168 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5169 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5170 clp->cl_ipaddr, port >> 8, port & 255);
5171
3a6bb738 5172 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5173 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5174 clp->cl_owner_id);
f11b2a1c
JL		 5175 task = rpc_run_task(&task_setup_data);
5176 if (IS_ERR(task)) {
5177 status = PTR_ERR(task);
5178 goto out;
5179 }
5180 status = task->tk_status;
5181 if (setclientid.sc_cred) {
5182 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5183 put_rpccred(setclientid.sc_cred);
5184 }
5185 rpc_put_task(task);
5186out:
c6d01c6f 5187 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5188 dprintk("NFS reply setclientid: %d\n", status);
5189 return status;
1da177e4
LT		 5190}
5191
6bbb4ae8
CL		 5192/**
5193 * nfs4_proc_setclientid_confirm - Confirm client ID
5194 * @clp: state data structure
5195 * @res: result of a previous SETCLIENTID
5196 * @cred: RPC credential to use for this call
5197 *
5198 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5199 */
fd954ae1 5200int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5201 struct nfs4_setclientid_res *arg,
5202 struct rpc_cred *cred)
1da177e4 5203{
1da177e4
LT		 5204 struct rpc_message msg = {
5205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5206 .rpc_argp = arg,
286d7d6a 5207 .rpc_cred = cred,
1da177e4 5208 };
1da177e4
LT		 5209 int status;
5210
6bbb4ae8
CL		 5211 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5212 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5213 clp->cl_clientid);
1bd714f2 5214 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5215 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5216 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5217 return status;
5218}
5219
fe650407
TM		 5220struct nfs4_delegreturndata {
5221 struct nfs4_delegreturnargs args;
fa178f29 5222 struct nfs4_delegreturnres res;
fe650407
TM		 5223 struct nfs_fh fh;
5224 nfs4_stateid stateid;
26e976a8 5225 unsigned long timestamp;
fa178f29 5226 struct nfs_fattr fattr;
fe650407 5227 int rpc_status;
039b756a
PT		 5228 struct inode *inode;
5229 bool roc;
5230 u32 roc_barrier;
fe650407
TM		 5231};
5232
fe650407
TM		 5233static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5234{
5235 struct nfs4_delegreturndata *data = calldata;
938e1010 5236
14516c3a
TM		 5237 if (!nfs4_sequence_done(task, &data->res.seq_res))
5238 return;
938e1010 5239
ca8acf8d 5240 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5241 switch (task->tk_status) {
79708861 5242 case 0:
fa178f29 5243 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5244 case -NFS4ERR_ADMIN_REVOKED:
5245 case -NFS4ERR_DELEG_REVOKED:
5246 case -NFS4ERR_BAD_STATEID:
5247 case -NFS4ERR_OLD_STATEID:
5248 case -NFS4ERR_STALE_STATEID:
5249 case -NFS4ERR_EXPIRED:
5250 task->tk_status = 0;
039b756a
PT		 5251 if (data->roc)
5252 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5253 break;
79708861 5254 default:
8478eaa1
N		 5255 if (nfs4_async_handle_error(task, data->res.server,
5256 NULL, NULL) == -EAGAIN) {
d00c5d43 5257 rpc_restart_call_prepare(task);
79708861
RL		 5258 return;
5259 }
5260 }
5261 data->rpc_status = task->tk_status;
fe650407
TM		 5262}
5263
5264static void nfs4_delegreturn_release(void *calldata)
5265{
039b756a 5266 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5267 struct inode *inode = data->inode;
039b756a 5268
ea7c38fe
TM		 5269 if (inode) {
5270 if (data->roc)
5271 pnfs_roc_release(inode);
5272 nfs_iput_and_deactive(inode);
5273 }
fe650407
TM		 5274 kfree(calldata);
5275}
5276
938e1010
AA		 5277static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5278{
5279 struct nfs4_delegreturndata *d_data;
5280
5281 d_data = (struct nfs4_delegreturndata *)data;
5282
039b756a
PT		 5283 if (d_data->roc &&
5284 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5285 return;
5286
d9afbd1b
TM		 5287 nfs4_setup_sequence(d_data->res.server,
5288 &d_data->args.seq_args,
5289 &d_data->res.seq_res,
5290 task);
938e1010 5291}
938e1010 5292
c8d149f3 5293static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5294 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5295 .rpc_call_done = nfs4_delegreturn_done,
5296 .rpc_release = nfs4_delegreturn_release,
5297};
5298
e6f81075 5299static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5300{
5301 struct nfs4_delegreturndata *data;
fa178f29 5302 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5303 struct rpc_task *task;
5138fde0
TM		 5304 struct rpc_message msg = {
5305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5306 .rpc_cred = cred,
5307 };
c970aa85
TM		 5308 struct rpc_task_setup task_setup_data = {
5309 .rpc_client = server->client,
5138fde0 5310 .rpc_message = &msg,
c970aa85
TM		 5311 .callback_ops = &nfs4_delegreturn_ops,
5312 .flags = RPC_TASK_ASYNC,
5313 };
e6f81075 5314 int status = 0;
fe650407 5315
8535b2be 5316 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5317 if (data == NULL)
5318 return -ENOMEM;
a9c92d6b 5319 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5320 data->args.fhandle = &data->fh;
5321 data->args.stateid = &data->stateid;
9e907fec 5322 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5323 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5324 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5325 data->res.fattr = &data->fattr;
5326 data->res.server = server;
5138fde0 5327 nfs_fattr_init(data->res.fattr);
26e976a8 5328 data->timestamp = jiffies;
fe650407 5329 data->rpc_status = 0;
ea7c38fe
TM		 5330 data->inode = nfs_igrab_and_active(inode);
5331 if (data->inode)
5332 data->roc = nfs4_roc(inode);
fe650407 5333
c970aa85 5334 task_setup_data.callback_data = data;
1174dd1f
TM		 5335 msg.rpc_argp = &data->args;
5336 msg.rpc_resp = &data->res;
c970aa85 5337 task = rpc_run_task(&task_setup_data);
7a1218a2 5338 if (IS_ERR(task))
fe650407 5339 return PTR_ERR(task);
e6f81075
TM		 5340 if (!issync)
5341 goto out;
fe650407 5342 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5343 if (status != 0)
5344 goto out;
5345 status = data->rpc_status;
e144cbcc
TM		 5346 if (status == 0)
5347 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5348 else
5349 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5350out:
e6b3c4db 5351 rpc_put_task(task);
fe650407 5352 return status;
1da177e4
LT		 5353}
5354
e6f81075 5355int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5356{
5357 struct nfs_server *server = NFS_SERVER(inode);
5358 struct nfs4_exception exception = { };
5359 int err;
5360 do {
e6f81075 5361 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5362 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5363 switch (err) {
5364 case -NFS4ERR_STALE_STATEID:
5365 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5366 case 0:
5367 return 0;
5368 }
5369 err = nfs4_handle_exception(server, err, &exception);
5370 } while (exception.retry);
5371 return err;
5372}
5373
5374#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5375#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5376
5377/*
5378 * sleep, with exponential backoff, and retry the LOCK operation.
5379 */
5380static unsigned long
5381nfs4_set_lock_task_retry(unsigned long timeout)
5382{
416ad3c9 5383 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5384 timeout <<= 1;
5385 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5386 return NFS4_LOCK_MAXTIMEOUT;
5387 return timeout;
5388}
5389
1da177e4
LT		 5390static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5391{
5392 struct inode *inode = state->inode;
5393 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5394 struct nfs_client *clp = server->nfs_client;
911d1aaf 5395 struct nfs_lockt_args arg = {
1da177e4 5396 .fh = NFS_FH(inode),
911d1aaf 5397 .fl = request,
1da177e4 5398 };
911d1aaf
TM		 5399 struct nfs_lockt_res res = {
5400 .denied = request,
1da177e4
LT		 5401 };
5402 struct rpc_message msg = {
5403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5404 .rpc_argp = &arg,
5405 .rpc_resp = &res,
5406 .rpc_cred = state->owner->so_cred,
5407 };
1da177e4
LT		 5408 struct nfs4_lock_state *lsp;
5409 int status;
5410
911d1aaf 5411 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5412 status = nfs4_set_lock_state(state, request);
5413 if (status != 0)
5414 goto out;
5415 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5416 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5417 arg.lock_owner.s_dev = server->s_dev;
7c513058 5418 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5419 switch (status) {
5420 case 0:
5421 request->fl_type = F_UNLCK;
5422 break;
5423 case -NFS4ERR_DENIED:
5424 status = 0;
1da177e4 5425 }
70cc6487 5426 request->fl_ops->fl_release_private(request);
a6f951dd 5427 request->fl_ops = NULL;
8d0a8a9d 5428out:
1da177e4
LT		 5429 return status;
5430}
5431
5432static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5433{
5434 struct nfs4_exception exception = { };
5435 int err;
5436
5437 do {
d1b748a5
TM		 5438 err = _nfs4_proc_getlk(state, cmd, request);
5439 trace_nfs4_get_lock(request, state, cmd, err);
5440 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5441 &exception);
5442 } while (exception.retry);
5443 return err;
5444}
5445
5446static int do_vfs_lock(struct file *file, struct file_lock *fl)
5447{
5448 int res = 0;
5449 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5450 case FL_POSIX:
5451 res = posix_lock_file_wait(file, fl);
5452 break;
5453 case FL_FLOCK:
5454 res = flock_lock_file_wait(file, fl);
5455 break;
5456 default:
5457 BUG();
5458 }
1da177e4
LT		 5459 return res;
5460}
5461
faf5f49c 5462struct nfs4_unlockdata {
911d1aaf
TM		 5463 struct nfs_locku_args arg;
5464 struct nfs_locku_res res;
faf5f49c
TM		 5465 struct nfs4_lock_state *lsp;
5466 struct nfs_open_context *ctx;
911d1aaf
TM		 5467 struct file_lock fl;
5468 const struct nfs_server *server;
26e976a8 5469 unsigned long timestamp;
faf5f49c
TM		 5470};
5471
911d1aaf
TM		 5472static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5473 struct nfs_open_context *ctx,
5474 struct nfs4_lock_state *lsp,
5475 struct nfs_seqid *seqid)
5476{
5477 struct nfs4_unlockdata *p;
5478 struct inode *inode = lsp->ls_state->inode;
5479
8535b2be 5480 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5481 if (p == NULL)
5482 return NULL;
5483 p->arg.fh = NFS_FH(inode);
5484 p->arg.fl = &p->fl;
5485 p->arg.seqid = seqid;
c1d51931 5486 p->res.seqid = seqid;
911d1aaf
TM		 5487 p->lsp = lsp;
5488 atomic_inc(&lsp->ls_count);
5489 /* Ensure we don't close file until we're done freeing locks! */
5490 p->ctx = get_nfs_open_context(ctx);
5491 memcpy(&p->fl, fl, sizeof(p->fl));
5492 p->server = NFS_SERVER(inode);
5493 return p;
5494}
5495
06f814a3 5496static void nfs4_locku_release_calldata(void *data)
faf5f49c 5497{
963d8fe5 5498 struct nfs4_unlockdata *calldata = data;
911d1aaf 5499 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5500 nfs4_put_lock_state(calldata->lsp);
5501 put_nfs_open_context(calldata->ctx);
5502 kfree(calldata);
faf5f49c
TM		 5503}
5504
963d8fe5 5505static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5506{
963d8fe5 5507 struct nfs4_unlockdata *calldata = data;
faf5f49c 5508
14516c3a
TM		 5509 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5510 return;
faf5f49c
TM		 5511 switch (task->tk_status) {
5512 case 0:
26e976a8 5513 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5514 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5515 if (nfs4_update_lock_stateid(calldata->lsp,
5516 &calldata->res.stateid))
5517 break;
9e33bed5
TM		 5518 case -NFS4ERR_BAD_STATEID:
5519 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5520 case -NFS4ERR_STALE_STATEID:
5521 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5522 if (!nfs4_stateid_match(&calldata->arg.stateid,
5523 &calldata->lsp->ls_stateid))
5524 rpc_restart_call_prepare(task);
faf5f49c
TM		 5525 break;
5526 default:
8478eaa1
N		 5527 if (nfs4_async_handle_error(task, calldata->server,
5528 NULL, NULL) == -EAGAIN)
d00c5d43 5529 rpc_restart_call_prepare(task);
faf5f49c 5530 }
2b1bc308 5531 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5532}
5533
4ce70ada 5534static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5535{
4ce70ada 5536 struct nfs4_unlockdata *calldata = data;
faf5f49c 5537
911d1aaf 5538 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5539 goto out_wait;
425c1d4e 5540 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5541 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5542 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5543 goto out_no_action;
faf5f49c 5544 }
26e976a8 5545 calldata->timestamp = jiffies;
035168ab 5546 if (nfs4_setup_sequence(calldata->server,
a893693c 5547 &calldata->arg.seq_args,
2240a9e2
TM		 5548 &calldata->res.seq_res,
5549 task) != 0)
5550 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5551 return;
5552out_no_action:
5553 task->tk_action = NULL;
5554out_wait:
5555 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5556}
5557
963d8fe5 5558static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5559 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5560 .rpc_call_done = nfs4_locku_done,
06f814a3 5561 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5562};
5563
a5d16a4d
TM		 5564static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5565 struct nfs_open_context *ctx,
5566 struct nfs4_lock_state *lsp,
5567 struct nfs_seqid *seqid)
5568{
5569 struct nfs4_unlockdata *data;
5138fde0
TM		 5570 struct rpc_message msg = {
5571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5572 .rpc_cred = ctx->cred,
5573 };
c970aa85
TM		 5574 struct rpc_task_setup task_setup_data = {
5575 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5576 .rpc_message = &msg,
c970aa85 5577 .callback_ops = &nfs4_locku_ops,
101070ca 5578 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5579 .flags = RPC_TASK_ASYNC,
5580 };
a5d16a4d 5581
fa940720
WAA		 5582 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5583 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5584
137d6aca
FF		 5585 /* Ensure this is an unlock - when canceling a lock, the
5586 * canceled lock is passed in, and it won't be an unlock.
5587 */
5588 fl->fl_type = F_UNLCK;
5589
a5d16a4d
TM		 5590 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5591 if (data == NULL) {
5592 nfs_free_seqid(seqid);
5593 return ERR_PTR(-ENOMEM);
5594 }
5595
a9c92d6b 5596 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5597 msg.rpc_argp = &data->arg;
5598 msg.rpc_resp = &data->res;
c970aa85
TM		 5599 task_setup_data.callback_data = data;
5600 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5601}
5602
faf5f49c
TM		 5603static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5604{
65b62a29
TM		 5605 struct inode *inode = state->inode;
5606 struct nfs4_state_owner *sp = state->owner;
5607 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5608 struct nfs_seqid *seqid;
1da177e4 5609 struct nfs4_lock_state *lsp;
06f814a3 5610 struct rpc_task *task;
b4019c0e 5611 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5612 int status = 0;
536ff0f8 5613 unsigned char fl_flags = request->fl_flags;
faf5f49c 5614
8d0a8a9d 5615 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5616 /* Unlock _before_ we do the RPC call */
5617 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5618 /* Exclude nfs_delegation_claim_locks() */
5619 mutex_lock(&sp->so_delegreturn_mutex);
5620 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5621 down_read(&nfsi->rwsem);
5622 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5623 up_read(&nfsi->rwsem);
65b62a29 5624 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5625 goto out;
19e03c57
TM		 5626 }
5627 up_read(&nfsi->rwsem);
65b62a29 5628 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5629 if (status != 0)
9b073574
TM		 5630 goto out;
5631 /* Is this a delegated lock? */
8d0a8a9d 5632 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5633 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5634 goto out;
b4019c0e
TM		 5635 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5636 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5637 status = -ENOMEM;
badc76dd 5638 if (IS_ERR(seqid))
9b073574 5639 goto out;
cd3758e3 5640 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5641 status = PTR_ERR(task);
5642 if (IS_ERR(task))
9b073574 5643 goto out;
a5d16a4d 5644 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5645 rpc_put_task(task);
9b073574 5646out:
536ff0f8 5647 request->fl_flags = fl_flags;
d1b748a5 5648 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5649 return status;
5650}
5651
a5d16a4d
TM		 5652struct nfs4_lockdata {
5653 struct nfs_lock_args arg;
5654 struct nfs_lock_res res;
5655 struct nfs4_lock_state *lsp;
5656 struct nfs_open_context *ctx;
5657 struct file_lock fl;
26e976a8 5658 unsigned long timestamp;
a5d16a4d
TM		 5659 int rpc_status;
5660 int cancelled;
66179efe 5661 struct nfs_server *server;
a5d16a4d
TM		 5662};
5663
5664static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5665 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5666 gfp_t gfp_mask)
1da177e4 5667{
a5d16a4d
TM		 5668 struct nfs4_lockdata *p;
5669 struct inode *inode = lsp->ls_state->inode;
1da177e4 5670 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5671 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5672
8535b2be 5673 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5674 if (p == NULL)
5675 return NULL;
5676
5677 p->arg.fh = NFS_FH(inode);
5678 p->arg.fl = &p->fl;
8535b2be 5679 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5680 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5681 goto out_free;
b4019c0e
TM		 5682 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5683 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5684 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5685 goto out_free_seqid;
7539bbab 5686 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5687 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5688 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5689 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5690 p->lsp = lsp;
66179efe 5691 p->server = server;
a5d16a4d
TM		 5692 atomic_inc(&lsp->ls_count);
5693 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5694 get_file(fl->fl_file);
a5d16a4d
TM		 5695 memcpy(&p->fl, fl, sizeof(p->fl));
5696 return p;
2f74c0a0
TM		 5697out_free_seqid:
5698 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5699out_free:
5700 kfree(p);
5701 return NULL;
5702}
5703
5704static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5705{
5706 struct nfs4_lockdata *data = calldata;
5707 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5708
3110ff80 5709 dprintk("%s: begin!\n", __func__);
2f74c0a0 5710 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5711 goto out_wait;
a5d16a4d 5712 /* Do we need to do an open_to_lock_owner? */
6b447539 5713 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5714 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5715 goto out_release_lock_seqid;
8fe72bac 5716 }
425c1d4e
TM		 5717 nfs4_stateid_copy(&data->arg.open_stateid,
5718 &state->open_stateid);
a5d16a4d 5719 data->arg.new_lock_owner = 1;
c1d51931 5720 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5721 } else {
2f74c0a0 5722 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5723 nfs4_stateid_copy(&data->arg.lock_stateid,
5724 &data->lsp->ls_stateid);
5725 }
5d422301
TM		 5726 if (!nfs4_valid_open_stateid(state)) {
5727 data->rpc_status = -EBADF;
5728 task->tk_action = NULL;
5729 goto out_release_open_seqid;
5730 }
26e976a8 5731 data->timestamp = jiffies;
035168ab
TM		 5732 if (nfs4_setup_sequence(data->server,
5733 &data->arg.seq_args,
2240a9e2 5734 &data->res.seq_res,
d9afbd1b 5735 task) == 0)
66179efe 5736 return;
5d422301 5737out_release_open_seqid:
2240a9e2
TM		 5738 nfs_release_seqid(data->arg.open_seqid);
5739out_release_lock_seqid:
5740 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5741out_wait:
5742 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5743 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5744}
5745
a5d16a4d
TM		 5746static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5747{
5748 struct nfs4_lockdata *data = calldata;
39071e6f 5749 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5750
3110ff80 5751 dprintk("%s: begin!\n", __func__);
a5d16a4d 5752
14516c3a
TM		 5753 if (!nfs4_sequence_done(task, &data->res.seq_res))
5754 return;
66179efe 5755
a5d16a4d 5756 data->rpc_status = task->tk_status;
425c1d4e
TM		 5757 switch (task->tk_status) {
5758 case 0:
2b0143b5 5759 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5760 data->timestamp);
c69899a1
TM		 5761 if (data->arg.new_lock) {
5762 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5763 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5764 rpc_restart_call_prepare(task);
5765 break;
5766 }
5767 }
39071e6f
TM		 5768 if (data->arg.new_lock_owner != 0) {
5769 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5770 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5771 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5772 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5773 rpc_restart_call_prepare(task);
425c1d4e
TM		 5774 break;
5775 case -NFS4ERR_BAD_STATEID:
5776 case -NFS4ERR_OLD_STATEID:
5777 case -NFS4ERR_STALE_STATEID:
5778 case -NFS4ERR_EXPIRED:
5779 if (data->arg.new_lock_owner != 0) {
5780 if (!nfs4_stateid_match(&data->arg.open_stateid,
5781 &lsp->ls_state->open_stateid))
5782 rpc_restart_call_prepare(task);
5783 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5784 &lsp->ls_stateid))
5785 rpc_restart_call_prepare(task);
a5d16a4d 5786 }
3110ff80 5787 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5788}
5789
5790static void nfs4_lock_release(void *calldata)
5791{
5792 struct nfs4_lockdata *data = calldata;
5793
3110ff80 5794 dprintk("%s: begin!\n", __func__);
2f74c0a0 5795 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5796 if (data->cancelled != 0) {
5797 struct rpc_task *task;
5798 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5799 data->arg.lock_seqid);
5800 if (!IS_ERR(task))
bf294b41 5801 rpc_put_task_async(task);
3110ff80 5802 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5803 } else
5804 nfs_free_seqid(data->arg.lock_seqid);
5805 nfs4_put_lock_state(data->lsp);
5806 put_nfs_open_context(data->ctx);
feaff8e5 5807 fput(data->fl.fl_file);
a5d16a4d 5808 kfree(data);
3110ff80 5809 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5810}
5811
5812static const struct rpc_call_ops nfs4_lock_ops = {
5813 .rpc_call_prepare = nfs4_lock_prepare,
5814 .rpc_call_done = nfs4_lock_done,
5815 .rpc_release = nfs4_lock_release,
5816};
5817
2bee72a6
TM		 5818static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5819{
2bee72a6
TM		 5820 switch (error) {
5821 case -NFS4ERR_ADMIN_REVOKED:
5822 case -NFS4ERR_BAD_STATEID:
ecac799a 5823 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5824 if (new_lock_owner != 0 ||
795a88c9 5825 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5826 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5827 break;
5828 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5829 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5830 case -NFS4ERR_EXPIRED:
5831 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5832 };
5833}
5834
afe6c27c 5835static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5836{
5837 struct nfs4_lockdata *data;
5838 struct rpc_task *task;
5138fde0
TM		 5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5841 .rpc_cred = state->owner->so_cred,
5842 };
c970aa85
TM		 5843 struct rpc_task_setup task_setup_data = {
5844 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5845 .rpc_message = &msg,
c970aa85 5846 .callback_ops = &nfs4_lock_ops,
101070ca 5847 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5848 .flags = RPC_TASK_ASYNC,
5849 };
a5d16a4d
TM		 5850 int ret;
5851
3110ff80 5852 dprintk("%s: begin!\n", __func__);
cd3758e3 5853 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5854 fl->fl_u.nfs4_fl.owner,
5855 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5856 if (data == NULL)
5857 return -ENOMEM;
5858 if (IS_SETLKW(cmd))
5859 data->arg.block = 1;
a9c92d6b 5860 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5861 msg.rpc_argp = &data->arg;
5862 msg.rpc_resp = &data->res;
c970aa85 5863 task_setup_data.callback_data = data;
8fe72bac
TM		 5864 if (recovery_type > NFS_LOCK_NEW) {
5865 if (recovery_type == NFS_LOCK_RECLAIM)
5866 data->arg.reclaim = NFS_LOCK_RECLAIM;
5867 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5868 } else
5869 data->arg.new_lock = 1;
c970aa85 5870 task = rpc_run_task(&task_setup_data);
7a1218a2 5871 if (IS_ERR(task))
a5d16a4d 5872 return PTR_ERR(task);
a5d16a4d
TM		 5873 ret = nfs4_wait_for_completion_rpc_task(task);
5874 if (ret == 0) {
5875 ret = data->rpc_status;
2bee72a6
TM		 5876 if (ret)
5877 nfs4_handle_setlk_error(data->server, data->lsp,
5878 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5879 } else
5880 data->cancelled = 1;
e6b3c4db 5881 rpc_put_task(task);
3110ff80 5882 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5883 return ret;
1da177e4
LT		 5884}
5885
5886static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5887{
202b50dc 5888 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5889 struct nfs4_exception exception = {
5890 .inode = state->inode,
5891 };
202b50dc
TM		 5892 int err;
5893
5894 do {
42a2d13e
TM		 5895 /* Cache the lock if possible... */
5896 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5897 return 0;
afe6c27c 5898 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5899 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5900 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5901 break;
5902 nfs4_handle_exception(server, err, &exception);
5903 } while (exception.retry);
5904 return err;
1da177e4
LT		 5905}
5906
5907static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5908{
202b50dc 5909 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5910 struct nfs4_exception exception = {
5911 .inode = state->inode,
5912 };
202b50dc
TM		 5913 int err;
5914
6bfc93ef
TM		 5915 err = nfs4_set_lock_state(state, request);
5916 if (err != 0)
5917 return err;
f6de7a39 5918 if (!recover_lost_locks) {
ef1820f9
N		 5919 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5920 return 0;
5921 }
202b50dc 5922 do {
42a2d13e
TM		 5923 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5924 return 0;
afe6c27c 5925 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5926 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5927 switch (err) {
5928 default:
5929 goto out;
5930 case -NFS4ERR_GRACE:
5931 case -NFS4ERR_DELAY:
5932 nfs4_handle_exception(server, err, &exception);
5933 err = 0;
5934 }
202b50dc 5935 } while (exception.retry);
a9ed2e25 5936out:
202b50dc 5937 return err;
1da177e4
LT		 5938}
5939
f062eb6c 5940#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5941/**
5942 * nfs41_check_expired_locks - possibly free a lock stateid
5943 *
5944 * @state: NFSv4 state for an inode
5945 *
5946 * Returns NFS_OK if recovery for this stateid is now finished.
5947 * Otherwise a negative NFS4ERR value is returned.
5948 */
b01dd1d8 5949static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5950{
eb64cf96 5951 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5952 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5953 struct nfs_server *server = NFS_SERVER(state->inode);
5954
b01dd1d8 5955 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5956 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5957 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5958
5959 status = nfs41_test_stateid(server,
5960 &lsp->ls_stateid,
5961 cred);
08cb47fa 5962 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5963 if (status != NFS_OK) {
3e60ffdd
CL		 5964 /* Free the stateid unless the server
5965 * informs us the stateid is unrecognized. */
89af2739
CL		 5966 if (status != -NFS4ERR_BAD_STATEID)
5967 nfs41_free_stateid(server,
ab7cb0df
TM		 5968 &lsp->ls_stateid,
5969 cred);
795a88c9 5970 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5971 ret = status;
5972 }
5973 }
5974 };
5975
5976 return ret;
5977}
5978
5979static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5980{
5981 int status = NFS_OK;
5982
5983 if (test_bit(LK_STATE_IN_USE, &state->flags))
5984 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5985 if (status != NFS_OK)
5986 status = nfs4_lock_expired(state, request);
5987 return status;
f062eb6c
BS		 5988}
5989#endif
5990
1da177e4
LT		 5991static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5992{
19e03c57 5993 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5994 unsigned char fl_flags = request->fl_flags;
8e469ebd 5995 int status = -ENOLCK;
1da177e4 5996
8e469ebd
TM		 5997 if ((fl_flags & FL_POSIX) &&
5998 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5999 goto out;
6bfc93ef 6000 /* Is this a delegated open? */
6bfc93ef
TM		 6001 status = nfs4_set_lock_state(state, request);
6002 if (status != 0)
6003 goto out;
01c3b861
TM		 6004 request->fl_flags |= FL_ACCESS;
6005 status = do_vfs_lock(request->fl_file, request);
6006 if (status < 0)
6007 goto out;
19e03c57 6008 down_read(&nfsi->rwsem);
01c3b861 6009 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6010 /* Yes: cache locks! */
01c3b861 6011 /* ...but avoid races with delegation recall... */
19e03c57
TM		 6012 request->fl_flags = fl_flags & ~FL_SLEEP;
6013 status = do_vfs_lock(request->fl_file, request);
c69899a1 6014 up_read(&nfsi->rwsem);
9a99af49 6015 goto out;
9a99af49 6016 }
19e03c57 6017 up_read(&nfsi->rwsem);
c69899a1 6018 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6019out:
6020 request->fl_flags = fl_flags;
1da177e4
LT		 6021 return status;
6022}
6023
6024static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6025{
a1d0b5ee
TM		 6026 struct nfs4_exception exception = {
6027 .state = state,
05ffe24f 6028 .inode = state->inode,
a1d0b5ee 6029 };
1da177e4
LT		 6030 int err;
6031
6032 do {
965b5d67 6033 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6034 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6035 if (err == -NFS4ERR_DENIED)
6036 err = -EAGAIN;
1da177e4 6037 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6038 err, &exception);
1da177e4
LT		 6039 } while (exception.retry);
6040 return err;
6041}
6042
6043static int
6044nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6045{
6046 struct nfs_open_context *ctx;
6047 struct nfs4_state *state;
6048 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6049 int status;
6050
6051 /* verify open state */
cd3758e3 6052 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6053 state = ctx->state;
6054
6055 if (request->fl_start < 0 || request->fl_end < 0)
6056 return -EINVAL;
6057
d953126a
TM		 6058 if (IS_GETLK(cmd)) {
6059 if (state != NULL)
6060 return nfs4_proc_getlk(state, F_GETLK, request);
6061 return 0;
6062 }
1da177e4
LT		 6063
6064 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6065 return -EINVAL;
6066
d953126a
TM		 6067 if (request->fl_type == F_UNLCK) {
6068 if (state != NULL)
6069 return nfs4_proc_unlck(state, cmd, request);
6070 return 0;
6071 }
1da177e4 6072
d953126a
TM		 6073 if (state == NULL)
6074 return -ENOLCK;
55725513
TM		 6075 /*
6076 * Don't rely on the VFS having checked the file open mode,
6077 * since it won't do this for flock() locks.
6078 */
f44106e2 6079 switch (request->fl_type) {
55725513
TM		 6080 case F_RDLCK:
6081 if (!(filp->f_mode & FMODE_READ))
6082 return -EBADF;
6083 break;
6084 case F_WRLCK:
6085 if (!(filp->f_mode & FMODE_WRITE))
6086 return -EBADF;
6087 }
6088
1da177e4
LT		 6089 do {
6090 status = nfs4_proc_setlk(state, cmd, request);
6091 if ((status != -EAGAIN) || IS_SETLK(cmd))
6092 break;
6093 timeout = nfs4_set_lock_task_retry(timeout);
6094 status = -ERESTARTSYS;
6095 if (signalled())
6096 break;
6097 } while(status < 0);
1da177e4
LT		 6098 return status;
6099}
6100
db4f2e63 6101int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6102{
6103 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6104 int err;
6105
6106 err = nfs4_set_lock_state(state, fl);
6107 if (err != 0)
db4f2e63 6108 return err;
4a706fa0 6109 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6110 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6111}
6b3b5496 6112
cf470c3e
TM		 6113struct nfs_release_lockowner_data {
6114 struct nfs4_lock_state *lsp;
5ae67c4f 6115 struct nfs_server *server;
cf470c3e 6116 struct nfs_release_lockowner_args args;
b7e63a10 6117 struct nfs_release_lockowner_res res;
60ea6812 6118 unsigned long timestamp;
cf470c3e
TM		 6119};
6120
fbd4bfd1
CL		 6121static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6122{
6123 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6124 struct nfs_server *server = data->server;
cb04ad2a
PT		 6125 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6126 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6127 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6128 data->timestamp = jiffies;
fbd4bfd1
CL		 6129}
6130
6131static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6132{
6133 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6134 struct nfs_server *server = data->server;
6135
b7e63a10 6136 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6137
6138 switch (task->tk_status) {
6139 case 0:
6140 renew_lease(server, data->timestamp);
6141 break;
6142 case -NFS4ERR_STALE_CLIENTID:
6143 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6144 nfs4_schedule_lease_recovery(server->nfs_client);
6145 break;
60ea6812
CL		 6146 case -NFS4ERR_LEASE_MOVED:
6147 case -NFS4ERR_DELAY:
8478eaa1
N		 6148 if (nfs4_async_handle_error(task, server,
6149 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6150 rpc_restart_call_prepare(task);
6151 }
fbd4bfd1
CL		 6152}
6153
d3c7b7cc
TM		 6154static void nfs4_release_lockowner_release(void *calldata)
6155{
cf470c3e 6156 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6157 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6158 kfree(calldata);
6159}
6160
17280175 6161static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6162 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6163 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6164 .rpc_release = nfs4_release_lockowner_release,
6165};
6166
f1cdae87
JL		 6167static void
6168nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6169{
cf470c3e 6170 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6171 struct rpc_message msg = {
6172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6173 };
6174
6175 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6176 return;
fbd4bfd1 6177
cf470c3e
TM		 6178 data = kmalloc(sizeof(*data), GFP_NOFS);
6179 if (!data)
f1cdae87 6180 return;
cf470c3e 6181 data->lsp = lsp;
5ae67c4f 6182 data->server = server;
cf470c3e
TM		 6183 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6184 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6185 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6186
cf470c3e 6187 msg.rpc_argp = &data->args;
b7e63a10
TM		 6188 msg.rpc_resp = &data->res;
6189 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6190 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6191}
6192
aa1870af
BF		 6193#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6194
64c2ce8b
AK		 6195static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6196 const void *buf, size_t buflen,
6197 int flags, int type)
6b3b5496 6198{
64c2ce8b
AK		 6199 if (strcmp(key, "") != 0)
6200 return -EINVAL;
4b580ee3 6201
2b0143b5 6202 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6203}
6204
64c2ce8b
AK		 6205static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6206 void *buf, size_t buflen, int type)
6b3b5496 6207{
64c2ce8b
AK		 6208 if (strcmp(key, "") != 0)
6209 return -EINVAL;
aa1870af 6210
2b0143b5 6211 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6212}
6213
64c2ce8b
AK		 6214static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6215 size_t list_len, const char *name,
6216 size_t name_len, int type)
6b3b5496 6217{
64c2ce8b 6218 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6219
2b0143b5 6220 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6221 return 0;
64c2ce8b
AK		 6222
6223 if (list && len <= list_len)
6224 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6225 return len;
6b3b5496
BF		 6226}
6227
c9bccef6
DQ		 6228#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6229static inline int nfs4_server_supports_labels(struct nfs_server *server)
6230{
6231 return server->caps & NFS_CAP_SECURITY_LABEL;
6232}
6233
6234static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6235 const void *buf, size_t buflen,
6236 int flags, int type)
6237{
6238 if (security_ismaclabel(key))
6239 return nfs4_set_security_label(dentry, buf, buflen);
6240
6241 return -EOPNOTSUPP;
6242}
6243
6244static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6245 void *buf, size_t buflen, int type)
6246{
6247 if (security_ismaclabel(key))
2b0143b5 6248 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6249 return -EOPNOTSUPP;
6250}
6251
6252static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6253 size_t list_len, const char *name,
6254 size_t name_len, int type)
6255{
6256 size_t len = 0;
6257
2b0143b5
DH		 6258 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6259 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6260 if (list && len <= list_len)
2b0143b5 6261 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6262 }
6263 return len;
6264}
6265
6266static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6267 .prefix = XATTR_SECURITY_PREFIX,
6268 .list = nfs4_xattr_list_nfs4_label,
6269 .get = nfs4_xattr_get_nfs4_label,
6270 .set = nfs4_xattr_set_nfs4_label,
6271};
6272#endif
6273
6274
533eb461
AA		 6275/*
6276 * nfs_fhget will use either the mounted_on_fileid or the fileid
6277 */
69aaaae1
TM		 6278static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6279{
533eb461
AA		 6280 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6281 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6282 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6283 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6284 return;
6285
6286 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6287 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6288 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6289 fattr->nlink = 2;
6290}
6291
f05d147f
BS		 6292static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6293 const struct qstr *name,
6294 struct nfs4_fs_locations *fs_locations,
6295 struct page *page)
683b57b4
TM		 6296{
6297 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6298 u32 bitmask[3] = {
361e624f 6299 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6300 };
6301 struct nfs4_fs_locations_arg args = {
6302 .dir_fh = NFS_FH(dir),
c228fd3a 6303 .name = name,
683b57b4
TM		 6304 .page = page,
6305 .bitmask = bitmask,
6306 };
22958463
BH		 6307 struct nfs4_fs_locations_res res = {
6308 .fs_locations = fs_locations,
6309 };
683b57b4
TM		 6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6312 .rpc_argp = &args,
22958463 6313 .rpc_resp = &res,
683b57b4
TM		 6314 };
6315 int status;
6316
3110ff80 6317 dprintk("%s: start\n", __func__);
533eb461
AA		 6318
6319 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6320 * is not supported */
6321 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6322 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6323 else
6324 bitmask[0] |= FATTR4_WORD0_FILEID;
6325
c228fd3a 6326 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6327 fs_locations->server = server;
830b8e33 6328 fs_locations->nlocations = 0;
f05d147f 6329 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6330 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6331 return status;
6332}
6333
f05d147f
BS		 6334int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6335 const struct qstr *name,
6336 struct nfs4_fs_locations *fs_locations,
6337 struct page *page)
db0a9593
BS		 6338{
6339 struct nfs4_exception exception = { };
6340 int err;
6341 do {
078ea3df
TM		 6342 err = _nfs4_proc_fs_locations(client, dir, name,
6343 fs_locations, page);
6344 trace_nfs4_get_fs_locations(dir, name, err);
6345 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6346 &exception);
6347 } while (exception.retry);
6348 return err;
6349}
6350
b03d735b
CL		 6351/*
6352 * This operation also signals the server that this client is
6353 * performing migration recovery. The server can stop returning
6354 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6355 * appended to this compound to identify the client ID which is
6356 * performing recovery.
6357 */
6358static int _nfs40_proc_get_locations(struct inode *inode,
6359 struct nfs4_fs_locations *locations,
6360 struct page *page, struct rpc_cred *cred)
6361{
6362 struct nfs_server *server = NFS_SERVER(inode);
6363 struct rpc_clnt *clnt = server->client;
6364 u32 bitmask[2] = {
6365 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6366 };
6367 struct nfs4_fs_locations_arg args = {
6368 .clientid = server->nfs_client->cl_clientid,
6369 .fh = NFS_FH(inode),
6370 .page = page,
6371 .bitmask = bitmask,
6372 .migration = 1, /* skip LOOKUP */
6373 .renew = 1, /* append RENEW */
6374 };
6375 struct nfs4_fs_locations_res res = {
6376 .fs_locations = locations,
6377 .migration = 1,
6378 .renew = 1,
6379 };
6380 struct rpc_message msg = {
6381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6382 .rpc_argp = &args,
6383 .rpc_resp = &res,
6384 .rpc_cred = cred,
6385 };
6386 unsigned long now = jiffies;
6387 int status;
6388
6389 nfs_fattr_init(&locations->fattr);
6390 locations->server = server;
6391 locations->nlocations = 0;
6392
6393 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6394 nfs4_set_sequence_privileged(&args.seq_args);
6395 status = nfs4_call_sync_sequence(clnt, server, &msg,
6396 &args.seq_args, &res.seq_res);
6397 if (status)
6398 return status;
6399
6400 renew_lease(server, now);
6401 return 0;
6402}
6403
6404#ifdef CONFIG_NFS_V4_1
6405
6406/*
6407 * This operation also signals the server that this client is
6408 * performing migration recovery. The server can stop asserting
6409 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6410 * performing this operation is identified in the SEQUENCE
6411 * operation in this compound.
6412 *
6413 * When the client supports GETATTR(fs_locations_info), it can
6414 * be plumbed in here.
6415 */
6416static int _nfs41_proc_get_locations(struct inode *inode,
6417 struct nfs4_fs_locations *locations,
6418 struct page *page, struct rpc_cred *cred)
6419{
6420 struct nfs_server *server = NFS_SERVER(inode);
6421 struct rpc_clnt *clnt = server->client;
6422 u32 bitmask[2] = {
6423 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6424 };
6425 struct nfs4_fs_locations_arg args = {
6426 .fh = NFS_FH(inode),
6427 .page = page,
6428 .bitmask = bitmask,
6429 .migration = 1, /* skip LOOKUP */
6430 };
6431 struct nfs4_fs_locations_res res = {
6432 .fs_locations = locations,
6433 .migration = 1,
6434 };
6435 struct rpc_message msg = {
6436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6437 .rpc_argp = &args,
6438 .rpc_resp = &res,
6439 .rpc_cred = cred,
6440 };
6441 int status;
6442
6443 nfs_fattr_init(&locations->fattr);
6444 locations->server = server;
6445 locations->nlocations = 0;
6446
6447 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6448 nfs4_set_sequence_privileged(&args.seq_args);
6449 status = nfs4_call_sync_sequence(clnt, server, &msg,
6450 &args.seq_args, &res.seq_res);
6451 if (status == NFS4_OK &&
6452 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6453 status = -NFS4ERR_LEASE_MOVED;
6454 return status;
6455}
6456
6457#endif /* CONFIG_NFS_V4_1 */
6458
6459/**
6460 * nfs4_proc_get_locations - discover locations for a migrated FSID
6461 * @inode: inode on FSID that is migrating
6462 * @locations: result of query
6463 * @page: buffer
6464 * @cred: credential to use for this operation
6465 *
6466 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6467 * operation failed, or a negative errno if a local error occurred.
6468 *
6469 * On success, "locations" is filled in, but if the server has
6470 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6471 * asserted.
6472 *
6473 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6474 * from this client that require migration recovery.
6475 */
6476int nfs4_proc_get_locations(struct inode *inode,
6477 struct nfs4_fs_locations *locations,
6478 struct page *page, struct rpc_cred *cred)
6479{
6480 struct nfs_server *server = NFS_SERVER(inode);
6481 struct nfs_client *clp = server->nfs_client;
6482 const struct nfs4_mig_recovery_ops *ops =
6483 clp->cl_mvops->mig_recovery_ops;
6484 struct nfs4_exception exception = { };
6485 int status;
6486
6487 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6488 (unsigned long long)server->fsid.major,
6489 (unsigned long long)server->fsid.minor,
6490 clp->cl_hostname);
6491 nfs_display_fhandle(NFS_FH(inode), __func__);
6492
6493 do {
6494 status = ops->get_locations(inode, locations, page, cred);
6495 if (status != -NFS4ERR_DELAY)
6496 break;
6497 nfs4_handle_exception(server, status, &exception);
6498 } while (exception.retry);
6499 return status;
6500}
6501
44c99933
CL		 6502/*
6503 * This operation also signals the server that this client is
6504 * performing "lease moved" recovery. The server can stop
6505 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6506 * is appended to this compound to identify the client ID which is
6507 * performing recovery.
6508 */
6509static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6510{
6511 struct nfs_server *server = NFS_SERVER(inode);
6512 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6513 struct rpc_clnt *clnt = server->client;
6514 struct nfs4_fsid_present_arg args = {
6515 .fh = NFS_FH(inode),
6516 .clientid = clp->cl_clientid,
6517 .renew = 1, /* append RENEW */
6518 };
6519 struct nfs4_fsid_present_res res = {
6520 .renew = 1,
6521 };
6522 struct rpc_message msg = {
6523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6524 .rpc_argp = &args,
6525 .rpc_resp = &res,
6526 .rpc_cred = cred,
6527 };
6528 unsigned long now = jiffies;
6529 int status;
6530
6531 res.fh = nfs_alloc_fhandle();
6532 if (res.fh == NULL)
6533 return -ENOMEM;
6534
6535 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6536 nfs4_set_sequence_privileged(&args.seq_args);
6537 status = nfs4_call_sync_sequence(clnt, server, &msg,
6538 &args.seq_args, &res.seq_res);
6539 nfs_free_fhandle(res.fh);
6540 if (status)
6541 return status;
6542
6543 do_renew_lease(clp, now);
6544 return 0;
6545}
6546
6547#ifdef CONFIG_NFS_V4_1
6548
6549/*
6550 * This operation also signals the server that this client is
6551 * performing "lease moved" recovery. The server can stop asserting
6552 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6553 * this operation is identified in the SEQUENCE operation in this
6554 * compound.
6555 */
6556static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6557{
6558 struct nfs_server *server = NFS_SERVER(inode);
6559 struct rpc_clnt *clnt = server->client;
6560 struct nfs4_fsid_present_arg args = {
6561 .fh = NFS_FH(inode),
6562 };
6563 struct nfs4_fsid_present_res res = {
6564 };
6565 struct rpc_message msg = {
6566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6567 .rpc_argp = &args,
6568 .rpc_resp = &res,
6569 .rpc_cred = cred,
6570 };
6571 int status;
6572
6573 res.fh = nfs_alloc_fhandle();
6574 if (res.fh == NULL)
6575 return -ENOMEM;
6576
6577 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6578 nfs4_set_sequence_privileged(&args.seq_args);
6579 status = nfs4_call_sync_sequence(clnt, server, &msg,
6580 &args.seq_args, &res.seq_res);
6581 nfs_free_fhandle(res.fh);
6582 if (status == NFS4_OK &&
6583 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6584 status = -NFS4ERR_LEASE_MOVED;
6585 return status;
6586}
6587
6588#endif /* CONFIG_NFS_V4_1 */
6589
6590/**
6591 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6592 * @inode: inode on FSID to check
6593 * @cred: credential to use for this operation
6594 *
6595 * Server indicates whether the FSID is present, moved, or not
6596 * recognized. This operation is necessary to clear a LEASE_MOVED
6597 * condition for this client ID.
6598 *
6599 * Returns NFS4_OK if the FSID is present on this server,
6600 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6601 * NFS4ERR code if some error occurred on the server, or a
6602 * negative errno if a local failure occurred.
6603 */
6604int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6605{
6606 struct nfs_server *server = NFS_SERVER(inode);
6607 struct nfs_client *clp = server->nfs_client;
6608 const struct nfs4_mig_recovery_ops *ops =
6609 clp->cl_mvops->mig_recovery_ops;
6610 struct nfs4_exception exception = { };
6611 int status;
6612
6613 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6614 (unsigned long long)server->fsid.major,
6615 (unsigned long long)server->fsid.minor,
6616 clp->cl_hostname);
6617 nfs_display_fhandle(NFS_FH(inode), __func__);
6618
6619 do {
6620 status = ops->fsid_present(inode, cred);
6621 if (status != -NFS4ERR_DELAY)
6622 break;
6623 nfs4_handle_exception(server, status, &exception);
6624 } while (exception.retry);
6625 return status;
6626}
6627
5ec16a85 6628/**
a5250def
WAA		 6629 * If 'use_integrity' is true and the state managment nfs_client
6630 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6631 * and the machine credential as per RFC3530bis and RFC5661 Security
6632 * Considerations sections. Otherwise, just use the user cred with the
6633 * filesystem's rpc_client.
5ec16a85 6634 */
a5250def 6635static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6636{
6637 int status;
6638 struct nfs4_secinfo_arg args = {
6639 .dir_fh = NFS_FH(dir),
6640 .name = name,
6641 };
6642 struct nfs4_secinfo_res res = {
6643 .flavors = flavors,
6644 };
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6647 .rpc_argp = &args,
6648 .rpc_resp = &res,
6649 };
a5250def 6650 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6651 struct rpc_cred *cred = NULL;
a5250def
WAA		 6652
6653 if (use_integrity) {
6654 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6655 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6656 msg.rpc_cred = cred;
a5250def 6657 }
5a5ea0d4
BS		 6658
6659 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6660
6661 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6662 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6663
a5250def
WAA		 6664 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6665 &res.seq_res, 0);
5a5ea0d4 6666 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6667
7cb852df
WAA		 6668 if (cred)
6669 put_rpccred(cred);
a5250def 6670
5a5ea0d4
BS		 6671 return status;
6672}
6673
72de53ec
BS		 6674int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6675 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6676{
6677 struct nfs4_exception exception = { };
6678 int err;
6679 do {
a5250def
WAA		 6680 err = -NFS4ERR_WRONGSEC;
6681
6682 /* try to use integrity protection with machine cred */
6683 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6684 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6685
6686 /*
6687 * if unable to use integrity protection, or SECINFO with
6688 * integrity protection returns NFS4ERR_WRONGSEC (which is
6689 * disallowed by spec, but exists in deployed servers) use
6690 * the current filesystem's rpc_client and the user cred.
6691 */
6692 if (err == -NFS4ERR_WRONGSEC)
6693 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6694
078ea3df
TM		 6695 trace_nfs4_secinfo(dir, name, err);
6696 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6697 &exception);
6698 } while (exception.retry);
6699 return err;
6700}
6701
557134a3 6702#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6703/*
6704 * Check the exchange flags returned by the server for invalid flags, having
6705 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6706 * DS flags set.
6707 */
6708static int nfs4_check_cl_exchange_flags(u32 flags)
6709{
6710 if (flags & ~EXCHGID4_FLAG_MASK_R)
6711 goto out_inval;
6712 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6713 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6714 goto out_inval;
6715 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6716 goto out_inval;
6717 return NFS_OK;
6718out_inval:
6719 return -NFS4ERR_INVAL;
6720}
6721
78fe0f41 6722static bool
79d4e1f0
CL		 6723nfs41_same_server_scope(struct nfs41_server_scope *a,
6724 struct nfs41_server_scope *b)
78fe0f41
WAA		 6725{
6726 if (a->server_scope_sz == b->server_scope_sz &&
6727 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6728 return true;
6729
6730 return false;
6731}
6732
7c44f1ae
WAA		 6733/*
6734 * nfs4_proc_bind_conn_to_session()
6735 *
6736 * The 4.1 client currently uses the same TCP connection for the
6737 * fore and backchannel.
6738 */
2cf047c9 6739int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6740{
6741 int status;
71a097c6
TM		 6742 struct nfs41_bind_conn_to_session_args args = {
6743 .client = clp,
6744 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6745 };
7c44f1ae
WAA		 6746 struct nfs41_bind_conn_to_session_res res;
6747 struct rpc_message msg = {
6748 .rpc_proc =
6749 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6750 .rpc_argp = &args,
7c44f1ae 6751 .rpc_resp = &res,
2cf047c9 6752 .rpc_cred = cred,
7c44f1ae
WAA		 6753 };
6754
6755 dprintk("--> %s\n", __func__);
7c44f1ae 6756
71a097c6
TM		 6757 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6758 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6759 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6760
6761 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6762 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6763 if (status == 0) {
71a097c6 6764 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6765 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6766 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6767 status = -EIO;
71a097c6 6768 goto out;
7c44f1ae 6769 }
71a097c6 6770 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6771 dprintk("NFS: %s: Unexpected direction from server\n",
6772 __func__);
6773 status = -EIO;
71a097c6 6774 goto out;
7c44f1ae 6775 }
71a097c6 6776 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6777 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6778 __func__);
6779 status = -EIO;
71a097c6 6780 goto out;
7c44f1ae
WAA		 6781 }
6782 }
7c44f1ae
WAA		 6783out:
6784 dprintk("<-- %s status= %d\n", __func__, status);
6785 return status;
6786}
6787
99fe60d0 6788/*
fa940720
WAA		 6789 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6790 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6791 */
6792static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6793 .how = SP4_MACH_CRED,
6794 .enforce.u.words = {
6795 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6796 1 << (OP_EXCHANGE_ID - 32) |
6797 1 << (OP_CREATE_SESSION - 32) |
6798 1 << (OP_DESTROY_SESSION - 32) |
6799 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6800 },
6801 .allow.u.words = {
6802 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6803 1 << (OP_LOCKU) |
6804 1 << (OP_COMMIT),
8b5bee2e 6805 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6806 1 << (OP_SECINFO_NO_NAME - 32) |
6807 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6808 1 << (OP_FREE_STATEID - 32) |
6809 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6810 }
6811};
6812
6813/*
6814 * Select the state protection mode for client `clp' given the server results
6815 * from exchange_id in `sp'.
99fe60d0 6816 *
2031cd1a
WAA		 6817 * Returns 0 on success, negative errno otherwise.
6818 */
6819static int nfs4_sp4_select_mode(struct nfs_client *clp,
6820 struct nfs41_state_protection *sp)
6821{
6822 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6823 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6824 1 << (OP_EXCHANGE_ID - 32) |
6825 1 << (OP_CREATE_SESSION - 32) |
6826 1 << (OP_DESTROY_SESSION - 32) |
6827 1 << (OP_DESTROY_CLIENTID - 32)
6828 };
6829 unsigned int i;
6830
6831 if (sp->how == SP4_MACH_CRED) {
6832 /* Print state protect result */
6833 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6834 for (i = 0; i <= LAST_NFS4_OP; i++) {
6835 if (test_bit(i, sp->enforce.u.longs))
6836 dfprintk(MOUNT, " enforce op %d\n", i);
6837 if (test_bit(i, sp->allow.u.longs))
6838 dfprintk(MOUNT, " allow op %d\n", i);
6839 }
6840
6841 /* make sure nothing is on enforce list that isn't supported */
6842 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6843 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6844 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6845 return -EINVAL;
6846 }
6847 }
6848
6849 /*
6850 * Minimal mode - state operations are allowed to use machine
6851 * credential. Note this already happens by default, so the
6852 * client doesn't have to do anything more than the negotiation.
6853 *
6854 * NOTE: we don't care if EXCHANGE_ID is in the list -
6855 * we're already using the machine cred for exchange_id
6856 * and will never use a different cred.
6857 */
6858 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6859 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6860 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6861 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6862 dfprintk(MOUNT, "sp4_mach_cred:\n");
6863 dfprintk(MOUNT, " minimal mode enabled\n");
6864 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6865 } else {
6866 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6867 return -EINVAL;
6868 }
fa940720
WAA		 6869
6870 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6871 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6872 dfprintk(MOUNT, " cleanup mode enabled\n");
6873 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6874 }
8b5bee2e
WAA		 6875
6876 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6877 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6878 dfprintk(MOUNT, " secinfo mode enabled\n");
6879 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6880 }
3787d506
WAA		 6881
6882 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6883 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6884 dfprintk(MOUNT, " stateid mode enabled\n");
6885 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6886 }
8c21c62c
WAA		 6887
6888 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6889 dfprintk(MOUNT, " write mode enabled\n");
6890 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6891 }
6892
6893 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6894 dfprintk(MOUNT, " commit mode enabled\n");
6895 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6896 }
2031cd1a
WAA		 6897 }
6898
6899 return 0;
6900}
6901
6902/*
6903 * _nfs4_proc_exchange_id()
6bbb4ae8 6904 *
2031cd1a 6905 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6906 */
2031cd1a
WAA		 6907static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6908 u32 sp4_how)
99fe60d0
BH		 6909{
6910 nfs4_verifier verifier;
6911 struct nfs41_exchange_id_args args = {
cd93710e 6912 .verifier = &verifier,
99fe60d0 6913 .client = clp,
cd3fadec 6914#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6915 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6916 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6917 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6918#else
6919 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6920 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6921#endif
99fe60d0
BH		 6922 };
6923 struct nfs41_exchange_id_res res = {
32b01310 6924 0
99fe60d0
BH		 6925 };
6926 int status;
6927 struct rpc_message msg = {
6928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6929 .rpc_argp = &args,
6930 .rpc_resp = &res,
6931 .rpc_cred = cred,
6932 };
99fe60d0 6933
f092075d 6934 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6935
6936 status = nfs4_init_uniform_client_string(clp);
6937 if (status)
3a6bb738 6938 goto out;
3a6bb738
JL		 6939
6940 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6941 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6942 clp->cl_owner_id);
99fe60d0 6943
acdeb69d 6944 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6945 GFP_NOFS);
acdeb69d 6946 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6947 status = -ENOMEM;
6948 goto out;
6949 }
78fe0f41 6950
79d4e1f0 6951 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6952 GFP_NOFS);
177313f1 6953 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6954 status = -ENOMEM;
acdeb69d 6955 goto out_server_owner;
abe9a6d5 6956 }
78fe0f41 6957
bbafffd2 6958 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6959 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6960 status = -ENOMEM;
6961 goto out_server_scope;
6962 }
6963
2031cd1a
WAA		 6964 switch (sp4_how) {
6965 case SP4_NONE:
6966 args.state_protect.how = SP4_NONE;
6967 break;
6968
6969 case SP4_MACH_CRED:
6970 args.state_protect = nfs4_sp4_mach_cred_request;
6971 break;
6972
6973 default:
6974 /* unsupported! */
6975 WARN_ON_ONCE(1);
6976 status = -EINVAL;
6977 goto out_server_scope;
6978 }
6979
1bd714f2 6980 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6981 trace_nfs4_exchange_id(clp, status);
177313f1 6982 if (status == 0)
32b01310 6983 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6984
2031cd1a
WAA		 6985 if (status == 0)
6986 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6987
acdeb69d 6988 if (status == 0) {
32b01310 6989 clp->cl_clientid = res.clientid;
e11259f9
TM		 6990 clp->cl_exchange_flags = res.flags;
6991 /* Client ID is not confirmed */
6992 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6993 clear_bit(NFS4_SESSION_ESTABLISHED,
6994 &clp->cl_session->session_state);
32b01310 6995 clp->cl_seqid = res.seqid;
e11259f9 6996 }
32b01310 6997
acdeb69d
CL		 6998 kfree(clp->cl_serverowner);
6999 clp->cl_serverowner = res.server_owner;
7000 res.server_owner = NULL;
78fe0f41 7001
7d2ed9ac 7002 /* use the most recent implementation id */
59155546
CL		 7003 kfree(clp->cl_implid);
7004 clp->cl_implid = res.impl_id;
7d2ed9ac 7005
177313f1 7006 if (clp->cl_serverscope != NULL &&
79d4e1f0 7007 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7008 res.server_scope)) {
7009 dprintk("%s: server_scope mismatch detected\n",
7010 __func__);
7011 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7012 kfree(clp->cl_serverscope);
7013 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7014 }
7015
177313f1 7016 if (clp->cl_serverscope == NULL) {
79d4e1f0 7017 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 7018 goto out;
7019 }
32b01310
TM		 7020 } else
7021 kfree(res.impl_id);
7d2ed9ac 7022
acdeb69d
CL		 7023out_server_owner:
7024 kfree(res.server_owner);
7d2ed9ac 7025out_server_scope:
abe9a6d5
WAA		 7026 kfree(res.server_scope);
7027out:
177313f1 7028 if (clp->cl_implid != NULL)
6bbb4ae8 7029 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7030 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7031 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7032 clp->cl_implid->date.seconds,
7033 clp->cl_implid->date.nseconds);
6bbb4ae8 7034 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7035 return status;
7036}
7037
2031cd1a
WAA		 7038/*
7039 * nfs4_proc_exchange_id()
7040 *
7041 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7042 *
7043 * Since the clientid has expired, all compounds using sessions
7044 * associated with the stale clientid will be returning
7045 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7046 * be in some phase of session reset.
7047 *
7048 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7049 */
7050int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7051{
7052 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7053 int status;
7054
7055 /* try SP4_MACH_CRED if krb5i/p */
7056 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7057 authflavor == RPC_AUTH_GSS_KRB5P) {
7058 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7059 if (!status)
7060 return 0;
7061 }
7062
7063 /* try SP4_NONE */
7064 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7065}
7066
66245539
TM		 7067static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7068 struct rpc_cred *cred)
7069{
7070 struct rpc_message msg = {
7071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7072 .rpc_argp = clp,
7073 .rpc_cred = cred,
7074 };
7075 int status;
7076
7077 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7078 trace_nfs4_destroy_clientid(clp, status);
66245539 7079 if (status)
02c67525 7080 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7081 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7082 return status;
7083}
7084
7085static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7086 struct rpc_cred *cred)
7087{
7088 unsigned int loop;
7089 int ret;
7090
7091 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7092 ret = _nfs4_proc_destroy_clientid(clp, cred);
7093 switch (ret) {
7094 case -NFS4ERR_DELAY:
7095 case -NFS4ERR_CLIENTID_BUSY:
7096 ssleep(1);
7097 break;
7098 default:
7099 return ret;
7100 }
7101 }
7102 return 0;
7103}
7104
7105int nfs4_destroy_clientid(struct nfs_client *clp)
7106{
7107 struct rpc_cred *cred;
7108 int ret = 0;
7109
7110 if (clp->cl_mvops->minor_version < 1)
7111 goto out;
7112 if (clp->cl_exchange_flags == 0)
7113 goto out;
05f4c350
CL		 7114 if (clp->cl_preserve_clid)
7115 goto out;
73d8bde5 7116 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7117 ret = nfs4_proc_destroy_clientid(clp, cred);
7118 if (cred)
7119 put_rpccred(cred);
7120 switch (ret) {
7121 case 0:
7122 case -NFS4ERR_STALE_CLIENTID:
7123 clp->cl_exchange_flags = 0;
7124 }
7125out:
7126 return ret;
7127}
7128
2050f0cc
AA		 7129struct nfs4_get_lease_time_data {
7130 struct nfs4_get_lease_time_args *args;
7131 struct nfs4_get_lease_time_res *res;
7132 struct nfs_client *clp;
7133};
7134
7135static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7136 void *calldata)
7137{
2050f0cc
AA		 7138 struct nfs4_get_lease_time_data *data =
7139 (struct nfs4_get_lease_time_data *)calldata;
7140
7141 dprintk("--> %s\n", __func__);
7142 /* just setup sequence, do not trigger session recovery
7143 since we're invoked within one */
d9afbd1b
TM		 7144 nfs41_setup_sequence(data->clp->cl_session,
7145 &data->args->la_seq_args,
7146 &data->res->lr_seq_res,
7147 task);
2050f0cc
AA		 7148 dprintk("<-- %s\n", __func__);
7149}
7150
7151/*
7152 * Called from nfs4_state_manager thread for session setup, so don't recover
7153 * from sequence operation or clientid errors.
7154 */
7155static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7156{
7157 struct nfs4_get_lease_time_data *data =
7158 (struct nfs4_get_lease_time_data *)calldata;
7159
7160 dprintk("--> %s\n", __func__);
14516c3a
TM		 7161 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7162 return;
2050f0cc
AA		 7163 switch (task->tk_status) {
7164 case -NFS4ERR_DELAY:
7165 case -NFS4ERR_GRACE:
7166 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7167 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7168 task->tk_status = 0;
a8a4ae3a
AA		 7169 /* fall through */
7170 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7171 rpc_restart_call_prepare(task);
2050f0cc
AA		 7172 return;
7173 }
2050f0cc
AA		 7174 dprintk("<-- %s\n", __func__);
7175}
7176
17280175 7177static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7178 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7179 .rpc_call_done = nfs4_get_lease_time_done,
7180};
7181
7182int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7183{
7184 struct rpc_task *task;
7185 struct nfs4_get_lease_time_args args;
7186 struct nfs4_get_lease_time_res res = {
7187 .lr_fsinfo = fsinfo,
7188 };
7189 struct nfs4_get_lease_time_data data = {
7190 .args = &args,
7191 .res = &res,
7192 .clp = clp,
7193 };
7194 struct rpc_message msg = {
7195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7196 .rpc_argp = &args,
7197 .rpc_resp = &res,
7198 };
7199 struct rpc_task_setup task_setup = {
7200 .rpc_client = clp->cl_rpcclient,
7201 .rpc_message = &msg,
7202 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7203 .callback_data = &data,
7204 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7205 };
7206 int status;
7207
a9c92d6b 7208 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7209 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7210 dprintk("--> %s\n", __func__);
7211 task = rpc_run_task(&task_setup);
7212
7213 if (IS_ERR(task))
7214 status = PTR_ERR(task);
7215 else {
7216 status = task->tk_status;
7217 rpc_put_task(task);
7218 }
7219 dprintk("<-- %s return %d\n", __func__, status);
7220
7221 return status;
7222}
7223
fc931582
AA		 7224/*
7225 * Initialize the values to be used by the client in CREATE_SESSION
7226 * If nfs4_init_session set the fore channel request and response sizes,
7227 * use them.
7228 *
7229 * Set the back channel max_resp_sz_cached to zero to force the client to
7230 * always set csa_cachethis to FALSE because the current implementation
7231 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7232 */
7233static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7234{
18aad3d5
AA		 7235 unsigned int max_rqst_sz, max_resp_sz;
7236
7237 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7238 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7239
fc931582 7240 /* Fore channel attributes */
18aad3d5
AA		 7241 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7242 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7243 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7244 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7245
7246 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7247 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7248 __func__,
7249 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7250 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7251
7252 /* Back channel attributes */
fc931582
AA		 7253 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7254 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7255 args->bc_attrs.max_resp_sz_cached = 0;
7256 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7257 args->bc_attrs.max_reqs = 1;
7258
7259 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7260 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7261 __func__,
7262 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7263 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7264 args->bc_attrs.max_reqs);
7265}
7266
79969dd1
TM		 7267static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7268 struct nfs41_create_session_res *res)
8d35301d 7269{
43c2e885 7270 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7271 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7272
43c2e885
BF		 7273 if (rcvd->max_resp_sz > sent->max_resp_sz)
7274 return -EINVAL;
7275 /*
7276 * Our requested max_ops is the minimum we need; we're not
7277 * prepared to break up compounds into smaller pieces than that.
7278 * So, no point even trying to continue if the server won't
7279 * cooperate:
7280 */
7281 if (rcvd->max_ops < sent->max_ops)
7282 return -EINVAL;
7283 if (rcvd->max_reqs == 0)
7284 return -EINVAL;
b4b9a0c1
VG		 7285 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7286 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7287 return 0;
8d35301d
AA		 7288}
7289
79969dd1
TM		 7290static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7291 struct nfs41_create_session_res *res)
43c2e885
BF		 7292{
7293 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7294 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7295
b1c0df5f
TM		 7296 if (!(res->flags & SESSION4_BACK_CHAN))
7297 goto out;
43c2e885
BF		 7298 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7299 return -EINVAL;
7300 if (rcvd->max_resp_sz < sent->max_resp_sz)
7301 return -EINVAL;
7302 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7303 return -EINVAL;
7304 /* These would render the backchannel useless: */
b4b9a0c1 7305 if (rcvd->max_ops != sent->max_ops)
43c2e885 7306 return -EINVAL;
b4b9a0c1 7307 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7308 return -EINVAL;
b1c0df5f 7309out:
43c2e885
BF		 7310 return 0;
7311}
8d35301d 7312
8d35301d 7313static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7314 struct nfs41_create_session_res *res)
8d35301d 7315{
43c2e885 7316 int ret;
8d35301d 7317
79969dd1 7318 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7319 if (ret)
7320 return ret;
79969dd1
TM		 7321 return nfs4_verify_back_channel_attrs(args, res);
7322}
7323
7324static void nfs4_update_session(struct nfs4_session *session,
7325 struct nfs41_create_session_res *res)
7326{
7327 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7328 /* Mark client id and session as being confirmed */
7329 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7330 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7331 session->flags = res->flags;
7332 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7333 if (res->flags & SESSION4_BACK_CHAN)
7334 memcpy(&session->bc_attrs, &res->bc_attrs,
7335 sizeof(session->bc_attrs));
8d35301d
AA		 7336}
7337
848f5bda
TM		 7338static int _nfs4_proc_create_session(struct nfs_client *clp,
7339 struct rpc_cred *cred)
fc931582
AA		 7340{
7341 struct nfs4_session *session = clp->cl_session;
7342 struct nfs41_create_session_args args = {
7343 .client = clp,
79969dd1
TM		 7344 .clientid = clp->cl_clientid,
7345 .seqid = clp->cl_seqid,
fc931582
AA		 7346 .cb_program = NFS4_CALLBACK,
7347 };
79969dd1
TM		 7348 struct nfs41_create_session_res res;
7349
fc931582
AA		 7350 struct rpc_message msg = {
7351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7352 .rpc_argp = &args,
7353 .rpc_resp = &res,
848f5bda 7354 .rpc_cred = cred,
fc931582
AA		 7355 };
7356 int status;
7357
7358 nfs4_init_channel_attrs(&args);
0f91421e 7359 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7360
1bd714f2 7361 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7362 trace_nfs4_create_session(clp, status);
fc931582 7363
43095d39 7364 if (!status) {
8d35301d 7365 /* Verify the session's negotiated channel_attrs values */
79969dd1 7366 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7367 /* Increment the clientid slot sequence id */
79969dd1
TM		 7368 if (clp->cl_seqid == res.seqid)
7369 clp->cl_seqid++;
7370 if (status)
7371 goto out;
7372 nfs4_update_session(session, &res);
fc931582 7373 }
79969dd1 7374out:
fc931582
AA		 7375 return status;
7376}
7377
7378/*
7379 * Issues a CREATE_SESSION operation to the server.
7380 * It is the responsibility of the caller to verify the session is
7381 * expired before calling this routine.
7382 */
848f5bda 7383int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7384{
7385 int status;
7386 unsigned *ptr;
fc931582
AA		 7387 struct nfs4_session *session = clp->cl_session;
7388
7389 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7390
848f5bda 7391 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7392 if (status)
7393 goto out;
7394
aacd5537
AA		 7395 /* Init or reset the session slot tables */
7396 status = nfs4_setup_session_slot_tables(session);
7397 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7398 if (status)
7399 goto out;
7400
7401 ptr = (unsigned *)&session->sess_id.data[0];
7402 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7403 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7404out:
7405 dprintk("<-- %s\n", __func__);
7406 return status;
7407}
7408
0f3e66c6
AA		 7409/*
7410 * Issue the over-the-wire RPC DESTROY_SESSION.
7411 * The caller must serialize access to this routine.
7412 */
848f5bda
TM		 7413int nfs4_proc_destroy_session(struct nfs4_session *session,
7414 struct rpc_cred *cred)
0f3e66c6 7415{
848f5bda
TM		 7416 struct rpc_message msg = {
7417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7418 .rpc_argp = session,
7419 .rpc_cred = cred,
7420 };
0f3e66c6 7421 int status = 0;
0f3e66c6
AA		 7422
7423 dprintk("--> nfs4_proc_destroy_session\n");
7424
7425 /* session is still being setup */
e11259f9
TM		 7426 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7427 return 0;
0f3e66c6 7428
1bd714f2 7429 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7430 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7431
7432 if (status)
08106ac7 7433 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7434 "Session has been destroyed regardless...\n", status);
7435
7436 dprintk("<-- nfs4_proc_destroy_session\n");
7437 return status;
7438}
7439
fc01cea9
AA		 7440/*
7441 * Renew the cl_session lease.
7442 */
d5f8d3fe
TM		 7443struct nfs4_sequence_data {
7444 struct nfs_client *clp;
7445 struct nfs4_sequence_args args;
7446 struct nfs4_sequence_res res;
7447};
7448
dc96aef9
AB		 7449static void nfs41_sequence_release(void *data)
7450{
d5f8d3fe
TM		 7451 struct nfs4_sequence_data *calldata = data;
7452 struct nfs_client *clp = calldata->clp;
dc96aef9 7453
7135840f
AB		 7454 if (atomic_read(&clp->cl_count) > 1)
7455 nfs4_schedule_state_renewal(clp);
7456 nfs_put_client(clp);
d5f8d3fe 7457 kfree(calldata);
dc96aef9
AB		 7458}
7459
aa5190d0
TM		 7460static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7461{
7462 switch(task->tk_status) {
7463 case -NFS4ERR_DELAY:
aa5190d0
TM		 7464 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7465 return -EAGAIN;
7466 default:
0400a6b0 7467 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7468 }
7469 return 0;
7470}
7471
dc96aef9 7472static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7473{
d5f8d3fe
TM		 7474 struct nfs4_sequence_data *calldata = data;
7475 struct nfs_client *clp = calldata->clp;
fc01cea9 7476
14516c3a
TM		 7477 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7478 return;
fc01cea9 7479
c6d01c6f 7480 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7481 if (task->tk_status < 0) {
7482 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7483 if (atomic_read(&clp->cl_count) == 1)
7484 goto out;
fc01cea9 7485
aa5190d0
TM		 7486 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7487 rpc_restart_call_prepare(task);
fc01cea9
AA		 7488 return;
7489 }
7490 }
fc01cea9 7491 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7492out:
fc01cea9
AA		 7493 dprintk("<-- %s\n", __func__);
7494}
7495
7496static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7497{
d5f8d3fe
TM		 7498 struct nfs4_sequence_data *calldata = data;
7499 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7500 struct nfs4_sequence_args *args;
7501 struct nfs4_sequence_res *res;
7502
fc01cea9
AA		 7503 args = task->tk_msg.rpc_argp;
7504 res = task->tk_msg.rpc_resp;
7505
d9afbd1b 7506 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7507}
7508
7509static const struct rpc_call_ops nfs41_sequence_ops = {
7510 .rpc_call_done = nfs41_sequence_call_done,
7511 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7512 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7513};
7514
8fe72bac
TM		 7515static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7516 struct rpc_cred *cred,
7517 bool is_privileged)
fc01cea9 7518{
d5f8d3fe 7519 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7520 struct rpc_message msg = {
7521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7522 .rpc_cred = cred,
7523 };
71ac6da9
TM		 7524 struct rpc_task_setup task_setup_data = {
7525 .rpc_client = clp->cl_rpcclient,
7526 .rpc_message = &msg,
8fe72bac 7527 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7528 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7529 };
fc01cea9 7530
7135840f 7531 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7532 return ERR_PTR(-EIO);
dfb4f309 7533 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7534 if (calldata == NULL) {
7135840f 7535 nfs_put_client(clp);
71ac6da9 7536 return ERR_PTR(-ENOMEM);
fc01cea9 7537 }
a9c92d6b 7538 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7539 if (is_privileged)
7540 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7541 msg.rpc_argp = &calldata->args;
7542 msg.rpc_resp = &calldata->res;
7543 calldata->clp = clp;
71ac6da9 7544 task_setup_data.callback_data = calldata;
fc01cea9 7545
71ac6da9
TM		 7546 return rpc_run_task(&task_setup_data);
7547}
7548
2f60ea6b 7549static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7550{
7551 struct rpc_task *task;
7552 int ret = 0;
7553
2f60ea6b 7554 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7555 return -EAGAIN;
8fe72bac 7556 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7557 if (IS_ERR(task))
7558 ret = PTR_ERR(task);
7559 else
bf294b41 7560 rpc_put_task_async(task);
71ac6da9
TM		 7561 dprintk("<-- %s status=%d\n", __func__, ret);
7562 return ret;
7563}
7564
7565static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7566{
7567 struct rpc_task *task;
7568 int ret;
7569
8fe72bac 7570 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7571 if (IS_ERR(task)) {
7572 ret = PTR_ERR(task);
7573 goto out;
7574 }
7575 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7576 if (!ret) {
7577 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7578
7579 if (task->tk_status == 0)
7580 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7581 ret = task->tk_status;
b4410c2f 7582 }
71ac6da9
TM		 7583 rpc_put_task(task);
7584out:
7585 dprintk("<-- %s status=%d\n", __func__, ret);
7586 return ret;
fc01cea9
AA		 7587}
7588
fce5c838
RL		 7589struct nfs4_reclaim_complete_data {
7590 struct nfs_client *clp;
7591 struct nfs41_reclaim_complete_args arg;
7592 struct nfs41_reclaim_complete_res res;
7593};
7594
7595static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7596{
7597 struct nfs4_reclaim_complete_data *calldata = data;
7598
d9afbd1b
TM		 7599 nfs41_setup_sequence(calldata->clp->cl_session,
7600 &calldata->arg.seq_args,
7601 &calldata->res.seq_res,
7602 task);
fce5c838
RL		 7603}
7604
aa5190d0
TM		 7605static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7606{
7607 switch(task->tk_status) {
7608 case 0:
7609 case -NFS4ERR_COMPLETE_ALREADY:
7610 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7611 break;
7612 case -NFS4ERR_DELAY:
aa5190d0 7613 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7614 /* fall through */
7615 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7616 return -EAGAIN;
7617 default:
0400a6b0 7618 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7619 }
7620 return 0;
7621}
7622
fce5c838
RL		 7623static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7624{
7625 struct nfs4_reclaim_complete_data *calldata = data;
7626 struct nfs_client *clp = calldata->clp;
7627 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7628
7629 dprintk("--> %s\n", __func__);
14516c3a
TM		 7630 if (!nfs41_sequence_done(task, res))
7631 return;
fce5c838 7632
c6d01c6f 7633 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7634 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7635 rpc_restart_call_prepare(task);
7636 return;
7637 }
fce5c838
RL		 7638 dprintk("<-- %s\n", __func__);
7639}
7640
7641static void nfs4_free_reclaim_complete_data(void *data)
7642{
7643 struct nfs4_reclaim_complete_data *calldata = data;
7644
7645 kfree(calldata);
7646}
7647
7648static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7649 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7650 .rpc_call_done = nfs4_reclaim_complete_done,
7651 .rpc_release = nfs4_free_reclaim_complete_data,
7652};
7653
7654/*
7655 * Issue a global reclaim complete.
7656 */
965e9c23
TM		 7657static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7658 struct rpc_cred *cred)
fce5c838
RL		 7659{
7660 struct nfs4_reclaim_complete_data *calldata;
7661 struct rpc_task *task;
7662 struct rpc_message msg = {
7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7664 .rpc_cred = cred,
fce5c838
RL		 7665 };
7666 struct rpc_task_setup task_setup_data = {
7667 .rpc_client = clp->cl_rpcclient,
7668 .rpc_message = &msg,
7669 .callback_ops = &nfs4_reclaim_complete_call_ops,
7670 .flags = RPC_TASK_ASYNC,
7671 };
7672 int status = -ENOMEM;
7673
7674 dprintk("--> %s\n", __func__);
8535b2be 7675 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7676 if (calldata == NULL)
7677 goto out;
7678 calldata->clp = clp;
7679 calldata->arg.one_fs = 0;
fce5c838 7680
a9c92d6b 7681 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7682 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7683 msg.rpc_argp = &calldata->arg;
7684 msg.rpc_resp = &calldata->res;
7685 task_setup_data.callback_data = calldata;
7686 task = rpc_run_task(&task_setup_data);
acf82b85 7687 if (IS_ERR(task)) {
fce5c838 7688 status = PTR_ERR(task);
acf82b85
DC		 7689 goto out;
7690 }
c34c32ea
AA		 7691 status = nfs4_wait_for_completion_rpc_task(task);
7692 if (status == 0)
7693 status = task->tk_status;
fce5c838 7694 rpc_put_task(task);
acf82b85 7695 return 0;
fce5c838
RL		 7696out:
7697 dprintk("<-- %s status=%d\n", __func__, status);
7698 return status;
7699}
b1f69b75
AA		 7700
7701static void
7702nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7703{
7704 struct nfs4_layoutget *lgp = calldata;
c31663d4 7705 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7706 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7707
7708 dprintk("--> %s\n", __func__);
c31663d4
FI		 7709 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7710 * right now covering the LAYOUTGET we are about to send.
7711 * However, that is not so catastrophic, and there seems
7712 * to be no way to prevent it completely.
7713 */
6ba7db34 7714 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7715 &lgp->res.seq_res, task))
b1f69b75 7716 return;
cf7d63f1
FI		 7717 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7718 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7719 &lgp->args.range,
cf7d63f1
FI		 7720 lgp->args.ctx->state)) {
7721 rpc_exit(task, NFS4_OK);
cf7d63f1 7722 }
b1f69b75
AA		 7723}
7724
7725static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7726{
7727 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7728 struct inode *inode = lgp->args.inode;
7729 struct nfs_server *server = NFS_SERVER(inode);
7730 struct pnfs_layout_hdr *lo;
7731 struct nfs4_state *state = NULL;
ed7e5423 7732 unsigned long timeo, now, giveup;
b1f69b75 7733
ed7e5423 7734 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7735
6ba7db34 7736 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7737 goto out;
b1f69b75
AA		 7738
7739 switch (task->tk_status) {
7740 case 0:
ee314c2a 7741 goto out;
ed7e5423
BH		 7742 /*
7743 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7744 * (or clients) writing to the same RAID stripe
7745 */
b1f69b75 7746 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7747 /*
7748 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7749 * existing layout before getting a new one).
7750 */
b1f69b75 7751 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7752 timeo = rpc_get_timeout(task->tk_client);
7753 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7754 now = jiffies;
7755 if (time_after(giveup, now)) {
7756 unsigned long delay;
7757
7758 /* Delay for:
7759 * - Not less then NFS4_POLL_RETRY_MIN.
7760 * - One last time a jiffie before we give up
7761 * - exponential backoff (time_now minus start_attempt)
7762 */
7763 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7764 min((giveup - now - 1),
7765 now - lgp->args.timestamp));
7766
7767 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7768 __func__, delay);
7769 rpc_delay(task, delay);
7770 task->tk_status = 0;
7771 rpc_restart_call_prepare(task);
7772 goto out; /* Do not call nfs4_async_handle_error() */
7773 }
ee314c2a
TM		 7774 break;
7775 case -NFS4ERR_EXPIRED:
7776 case -NFS4ERR_BAD_STATEID:
7777 spin_lock(&inode->i_lock);
7778 lo = NFS_I(inode)->layout;
7779 if (!lo || list_empty(&lo->plh_segs)) {
7780 spin_unlock(&inode->i_lock);
7781 /* If the open stateid was bad, then recover it. */
7782 state = lgp->args.ctx->state;
7783 } else {
7784 LIST_HEAD(head);
7785
defb8460
CH		 7786 /*
7787 * Mark the bad layout state as invalid, then retry
7788 * with the current stateid.
7789 */
ee314c2a
TM		 7790 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7791 spin_unlock(&inode->i_lock);
ee314c2a 7792 pnfs_free_lseg_list(&head);
defb8460
CH		 7793
7794 task->tk_status = 0;
7795 rpc_restart_call_prepare(task);
b1f69b75
AA		 7796 }
7797 }
8478eaa1 7798 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7799 rpc_restart_call_prepare(task);
7800out:
b1f69b75
AA		 7801 dprintk("<-- %s\n", __func__);
7802}
7803
8554116e
IK		 7804static size_t max_response_pages(struct nfs_server *server)
7805{
7806 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7807 return nfs_page_array_len(0, max_resp_sz);
7808}
7809
7810static void nfs4_free_pages(struct page **pages, size_t size)
7811{
7812 int i;
7813
7814 if (!pages)
7815 return;
7816
7817 for (i = 0; i < size; i++) {
7818 if (!pages[i])
7819 break;
7820 __free_page(pages[i]);
7821 }
7822 kfree(pages);
7823}
7824
7825static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7826{
7827 struct page **pages;
7828 int i;
7829
7830 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7831 if (!pages) {
7832 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7833 return NULL;
7834 }
7835
7836 for (i = 0; i < size; i++) {
7837 pages[i] = alloc_page(gfp_flags);
7838 if (!pages[i]) {
7839 dprintk("%s: failed to allocate page\n", __func__);
7840 nfs4_free_pages(pages, size);
7841 return NULL;
7842 }
7843 }
7844
7845 return pages;
7846}
7847
b1f69b75
AA		 7848static void nfs4_layoutget_release(void *calldata)
7849{
7850 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7851 struct inode *inode = lgp->args.inode;
7852 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7853 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7854
7855 dprintk("--> %s\n", __func__);
8554116e 7856 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7857 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7858 put_nfs_open_context(lgp->args.ctx);
7859 kfree(calldata);
7860 dprintk("<-- %s\n", __func__);
7861}
7862
7863static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7864 .rpc_call_prepare = nfs4_layoutget_prepare,
7865 .rpc_call_done = nfs4_layoutget_done,
7866 .rpc_release = nfs4_layoutget_release,
7867};
7868
a0b0a6e3
TM		 7869struct pnfs_layout_segment *
7870nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7871{
a47970ff
WAA		 7872 struct inode *inode = lgp->args.inode;
7873 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7874 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7875 struct rpc_task *task;
7876 struct rpc_message msg = {
7877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7878 .rpc_argp = &lgp->args,
7879 .rpc_resp = &lgp->res,
6ab59344 7880 .rpc_cred = lgp->cred,
b1f69b75
AA		 7881 };
7882 struct rpc_task_setup task_setup_data = {
7883 .rpc_client = server->client,
7884 .rpc_message = &msg,
7885 .callback_ops = &nfs4_layoutget_call_ops,
7886 .callback_data = lgp,
7887 .flags = RPC_TASK_ASYNC,
7888 };
a0b0a6e3 7889 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7890 int status = 0;
7891
7892 dprintk("--> %s\n", __func__);
7893
4bd5a980
PT		 7894 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7895 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7896
8554116e
IK		 7897 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7898 if (!lgp->args.layout.pages) {
7899 nfs4_layoutget_release(lgp);
a0b0a6e3 7900 return ERR_PTR(-ENOMEM);
8554116e
IK		 7901 }
7902 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7903 lgp->args.timestamp = jiffies;
8554116e 7904
35124a09 7905 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7906 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7907 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7908
b1f69b75
AA		 7909 task = rpc_run_task(&task_setup_data);
7910 if (IS_ERR(task))
a0b0a6e3 7911 return ERR_CAST(task);
b1f69b75 7912 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7913 if (status == 0)
7914 status = task->tk_status;
1037e6ea
TM		 7915 trace_nfs4_layoutget(lgp->args.ctx,
7916 &lgp->args.range,
7917 &lgp->res.range,
7918 status);
085b7a45
WAA		 7919 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7920 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7921 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7922 rpc_put_task(task);
7923 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7924 if (status)
7925 return ERR_PTR(status);
7926 return lseg;
b1f69b75
AA		 7927}
7928
cbe82603
BH		 7929static void
7930nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7931{
7932 struct nfs4_layoutreturn *lrp = calldata;
7933
7934 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7935 nfs41_setup_sequence(lrp->clp->cl_session,
7936 &lrp->args.seq_args,
7937 &lrp->res.seq_res,
7938 task);
cbe82603
BH		 7939}
7940
7941static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7942{
7943 struct nfs4_layoutreturn *lrp = calldata;
7944 struct nfs_server *server;
7945
7946 dprintk("--> %s\n", __func__);
7947
6ba7db34 7948 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7949 return;
7950
7951 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7952 switch (task->tk_status) {
7953 default:
7954 task->tk_status = 0;
7955 case 0:
7956 break;
7957 case -NFS4ERR_DELAY:
8478eaa1 7958 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7959 break;
d00c5d43 7960 rpc_restart_call_prepare(task);
cbe82603
BH		 7961 return;
7962 }
cbe82603
BH		 7963 dprintk("<-- %s\n", __func__);
7964}
7965
7966static void nfs4_layoutreturn_release(void *calldata)
7967{
7968 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7969 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7970
7971 dprintk("--> %s\n", __func__);
849b286f
TM		 7972 spin_lock(&lo->plh_inode->i_lock);
7973 if (lrp->res.lrs_present)
7974 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7975 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7976 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7977 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7978 lo->plh_block_lgets--;
7979 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7980 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7981 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7982 kfree(calldata);
7983 dprintk("<-- %s\n", __func__);
7984}
7985
7986static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7987 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7988 .rpc_call_done = nfs4_layoutreturn_done,
7989 .rpc_release = nfs4_layoutreturn_release,
7990};
7991
6c16605d 7992int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7993{
7994 struct rpc_task *task;
7995 struct rpc_message msg = {
7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7997 .rpc_argp = &lrp->args,
7998 .rpc_resp = &lrp->res,
9556000d 7999 .rpc_cred = lrp->cred,
cbe82603
BH		 8000 };
8001 struct rpc_task_setup task_setup_data = {
1771c577 8002 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8003 .rpc_message = &msg,
8004 .callback_ops = &nfs4_layoutreturn_call_ops,
8005 .callback_data = lrp,
8006 };
6c16605d 8007 int status = 0;
cbe82603
BH		 8008
8009 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8010 if (!sync) {
8011 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8012 if (!lrp->inode) {
8013 nfs4_layoutreturn_release(lrp);
8014 return -EAGAIN;
8015 }
8016 task_setup_data.flags |= RPC_TASK_ASYNC;
8017 }
a9c92d6b 8018 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8019 task = rpc_run_task(&task_setup_data);
8020 if (IS_ERR(task))
8021 return PTR_ERR(task);
5a0ec8ac
TM		 8022 if (sync)
8023 status = task->tk_status;
1037e6ea 8024 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8025 dprintk("<-- %s status=%d\n", __func__, status);
8026 rpc_put_task(task);
8027 return status;
8028}
8029
b1f69b75 8030static int
cd5875fe
TM		 8031_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8032 struct pnfs_device *pdev,
8033 struct rpc_cred *cred)
b1f69b75
AA		 8034{
8035 struct nfs4_getdeviceinfo_args args = {
8036 .pdev = pdev,
4e590803
TM		 8037 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8038 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8039 };
8040 struct nfs4_getdeviceinfo_res res = {
8041 .pdev = pdev,
8042 };
8043 struct rpc_message msg = {
8044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8045 .rpc_argp = &args,
8046 .rpc_resp = &res,
cd5875fe 8047 .rpc_cred = cred,
b1f69b75
AA		 8048 };
8049 int status;
8050
8051 dprintk("--> %s\n", __func__);
7c513058 8052 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8053 if (res.notification & ~args.notify_types)
8054 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8055 if (res.notification != args.notify_types)
8056 pdev->nocache = 1;
4e590803 8057
b1f69b75
AA		 8058 dprintk("<-- %s status=%d\n", __func__, status);
8059
8060 return status;
8061}
8062
cd5875fe
TM		 8063int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8064 struct pnfs_device *pdev,
8065 struct rpc_cred *cred)
b1f69b75
AA		 8066{
8067 struct nfs4_exception exception = { };
8068 int err;
8069
8070 do {
8071 err = nfs4_handle_exception(server,
cd5875fe 8072 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8073 &exception);
8074 } while (exception.retry);
8075 return err;
8076}
8077EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8078
863a3c6c
AA		 8079static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8080{
8081 struct nfs4_layoutcommit_data *data = calldata;
8082 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8083 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8084
d9afbd1b
TM		 8085 nfs41_setup_sequence(session,
8086 &data->args.seq_args,
8087 &data->res.seq_res,
8088 task);
863a3c6c
AA		 8089}
8090
8091static void
8092nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8093{
8094 struct nfs4_layoutcommit_data *data = calldata;
8095 struct nfs_server *server = NFS_SERVER(data->args.inode);
8096
6ba7db34 8097 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8098 return;
8099
8100 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8101 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8102 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8103 case -NFS4ERR_BADLAYOUT: /* no layout */
8104 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8105 task->tk_status = 0;
e59d27e0 8106 case 0:
e59d27e0
TM		 8107 break;
8108 default:
8478eaa1 8109 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8110 rpc_restart_call_prepare(task);
8111 return;
8112 }
8113 }
863a3c6c
AA		 8114}
8115
8116static void nfs4_layoutcommit_release(void *calldata)
8117{
8118 struct nfs4_layoutcommit_data *data = calldata;
8119
db29c089 8120 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8121 nfs_post_op_update_inode_force_wcc(data->args.inode,
8122 data->res.fattr);
863a3c6c 8123 put_rpccred(data->cred);
472e2594 8124 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8125 kfree(data);
8126}
8127
8128static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8129 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8130 .rpc_call_done = nfs4_layoutcommit_done,
8131 .rpc_release = nfs4_layoutcommit_release,
8132};
8133
8134int
ef311537 8135nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8136{
8137 struct rpc_message msg = {
8138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8139 .rpc_argp = &data->args,
8140 .rpc_resp = &data->res,
8141 .rpc_cred = data->cred,
8142 };
8143 struct rpc_task_setup task_setup_data = {
8144 .task = &data->task,
8145 .rpc_client = NFS_CLIENT(data->args.inode),
8146 .rpc_message = &msg,
8147 .callback_ops = &nfs4_layoutcommit_ops,
8148 .callback_data = data,
863a3c6c
AA		 8149 };
8150 struct rpc_task *task;
8151 int status = 0;
8152
8153 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8154 "lbw: %llu inode %lu\n",
8155 data->task.tk_pid, sync,
8156 data->args.lastbytewritten,
8157 data->args.inode->i_ino);
8158
472e2594
TM		 8159 if (!sync) {
8160 data->inode = nfs_igrab_and_active(data->args.inode);
8161 if (data->inode == NULL) {
8162 nfs4_layoutcommit_release(data);
8163 return -EAGAIN;
8164 }
8165 task_setup_data.flags = RPC_TASK_ASYNC;
8166 }
a9c92d6b 8167 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8168 task = rpc_run_task(&task_setup_data);
8169 if (IS_ERR(task))
8170 return PTR_ERR(task);
472e2594
TM		 8171 if (sync)
8172 status = task->tk_status;
1037e6ea 8173 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8174 dprintk("%s: status %d\n", __func__, status);
8175 rpc_put_task(task);
8176 return status;
8177}
fca78d6d 8178
97431204
AA		 8179/**
8180 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8181 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8182 */
fca78d6d
BS		 8183static int
8184_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8185 struct nfs_fsinfo *info,
8186 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8187{
8188 struct nfs41_secinfo_no_name_args args = {
8189 .style = SECINFO_STYLE_CURRENT_FH,
8190 };
8191 struct nfs4_secinfo_res res = {
8192 .flavors = flavors,
8193 };
8194 struct rpc_message msg = {
8195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8196 .rpc_argp = &args,
8197 .rpc_resp = &res,
8198 };
b1b3e136 8199 struct rpc_clnt *clnt = server->client;
7cb852df 8200 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8201 int status;
8202
8203 if (use_integrity) {
8204 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8205 cred = nfs4_get_clid_cred(server->nfs_client);
8206 msg.rpc_cred = cred;
b1b3e136
WAA		 8207 }
8208
8209 dprintk("--> %s\n", __func__);
8210 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8211 &res.seq_res, 0);
8212 dprintk("<-- %s status=%d\n", __func__, status);
8213
7cb852df
WAA		 8214 if (cred)
8215 put_rpccred(cred);
b1b3e136
WAA		 8216
8217 return status;
fca78d6d
BS		 8218}
8219
8220static int
8221nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8222 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8223{
8224 struct nfs4_exception exception = { };
8225 int err;
8226 do {
b1b3e136
WAA		 8227 /* first try using integrity protection */
8228 err = -NFS4ERR_WRONGSEC;
8229
8230 /* try to use integrity protection with machine cred */
8231 if (_nfs4_is_integrity_protected(server->nfs_client))
8232 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8233 flavors, true);
8234
8235 /*
8236 * if unable to use integrity protection, or SECINFO with
8237 * integrity protection returns NFS4ERR_WRONGSEC (which is
8238 * disallowed by spec, but exists in deployed servers) use
8239 * the current filesystem's rpc_client and the user cred.
8240 */
8241 if (err == -NFS4ERR_WRONGSEC)
8242 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8243 flavors, false);
8244
fca78d6d
BS		 8245 switch (err) {
8246 case 0:
8247 case -NFS4ERR_WRONGSEC:
78b19bae 8248 case -ENOTSUPP:
05e9cfb4 8249 goto out;
fca78d6d
BS		 8250 default:
8251 err = nfs4_handle_exception(server, err, &exception);
8252 }
8253 } while (exception.retry);
05e9cfb4 8254out:
fca78d6d
BS		 8255 return err;
8256}
8257
8258static int
8259nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8260 struct nfs_fsinfo *info)
8261{
8262 int err;
8263 struct page *page;
367156d9 8264 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8265 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8266 struct nfs4_secinfo4 *secinfo;
8267 int i;
fca78d6d
BS		 8268
8269 page = alloc_page(GFP_KERNEL);
8270 if (!page) {
8271 err = -ENOMEM;
8272 goto out;
8273 }
8274
8275 flavors = page_address(page);
8276 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8277
8278 /*
8279 * Fall back on "guess and check" method if
8280 * the server doesn't support SECINFO_NO_NAME
8281 */
78b19bae 8282 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8283 err = nfs4_find_root_sec(server, fhandle, info);
8284 goto out_freepage;
8285 }
8286 if (err)
8287 goto out_freepage;
8288
58a8cf12
WAA		 8289 for (i = 0; i < flavors->num_flavors; i++) {
8290 secinfo = &flavors->flavors[i];
8291
8292 switch (secinfo->flavor) {
8293 case RPC_AUTH_NULL:
8294 case RPC_AUTH_UNIX:
8295 case RPC_AUTH_GSS:
8296 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8297 &secinfo->flavor_info);
8298 break;
8299 default:
8300 flavor = RPC_AUTH_MAXFLAVOR;
8301 break;
8302 }
8303
4d4b69dd
WAA		 8304 if (!nfs_auth_info_match(&server->auth_info, flavor))
8305 flavor = RPC_AUTH_MAXFLAVOR;
8306
58a8cf12
WAA		 8307 if (flavor != RPC_AUTH_MAXFLAVOR) {
8308 err = nfs4_lookup_root_sec(server, fhandle,
8309 info, flavor);
8310 if (!err)
8311 break;
8312 }
8313 }
8314
8315 if (flavor == RPC_AUTH_MAXFLAVOR)
8316 err = -EPERM;
fca78d6d
BS		 8317
8318out_freepage:
8319 put_page(page);
8320 if (err == -EACCES)
8321 return -EPERM;
8322out:
8323 return err;
8324}
1cab0652 8325
ab7cb0df
TM		 8326static int _nfs41_test_stateid(struct nfs_server *server,
8327 nfs4_stateid *stateid,
8328 struct rpc_cred *cred)
7d974794
BS		 8329{
8330 int status;
8331 struct nfs41_test_stateid_args args = {
1cab0652 8332 .stateid = stateid,
7d974794
BS		 8333 };
8334 struct nfs41_test_stateid_res res;
8335 struct rpc_message msg = {
8336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8337 .rpc_argp = &args,
8338 .rpc_resp = &res,
ab7cb0df 8339 .rpc_cred = cred,
7d974794 8340 };
3787d506
WAA		 8341 struct rpc_clnt *rpc_client = server->client;
8342
8343 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8344 &rpc_client, &msg);
1cab0652 8345
38527b15 8346 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8347 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8348 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8349 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8350 &args.seq_args, &res.seq_res);
38527b15
CL		 8351 if (status != NFS_OK) {
8352 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8353 return status;
38527b15
CL		 8354 }
8355 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8356 return -res.status;
7d974794
BS		 8357}
8358
38527b15
CL		 8359/**
8360 * nfs41_test_stateid - perform a TEST_STATEID operation
8361 *
8362 * @server: server / transport on which to perform the operation
8363 * @stateid: state ID to test
ab7cb0df 8364 * @cred: credential
38527b15
CL		 8365 *
8366 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8367 * Otherwise a negative NFS4ERR value is returned if the operation
8368 * failed or the state ID is not currently valid.
8369 */
ab7cb0df
TM		 8370static int nfs41_test_stateid(struct nfs_server *server,
8371 nfs4_stateid *stateid,
8372 struct rpc_cred *cred)
7d974794
BS		 8373{
8374 struct nfs4_exception exception = { };
8375 int err;
8376 do {
ab7cb0df 8377 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8378 if (err != -NFS4ERR_DELAY)
8379 break;
8380 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8381 } while (exception.retry);
8382 return err;
8383}
9aeda35f 8384
7c1d5fae
TM		 8385struct nfs_free_stateid_data {
8386 struct nfs_server *server;
8387 struct nfs41_free_stateid_args args;
9aeda35f 8388 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8389};
8390
8391static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8392{
8393 struct nfs_free_stateid_data *data = calldata;
8394 nfs41_setup_sequence(nfs4_get_session(data->server),
8395 &data->args.seq_args,
8396 &data->res.seq_res,
8397 task);
8398}
8399
8400static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8401{
8402 struct nfs_free_stateid_data *data = calldata;
8403
8404 nfs41_sequence_done(task, &data->res.seq_res);
8405
8406 switch (task->tk_status) {
8407 case -NFS4ERR_DELAY:
8478eaa1 8408 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8409 rpc_restart_call_prepare(task);
8410 }
8411}
8412
8413static void nfs41_free_stateid_release(void *calldata)
8414{
8415 kfree(calldata);
8416}
8417
17f26b12 8418static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8419 .rpc_call_prepare = nfs41_free_stateid_prepare,
8420 .rpc_call_done = nfs41_free_stateid_done,
8421 .rpc_release = nfs41_free_stateid_release,
8422};
8423
8424static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8425 nfs4_stateid *stateid,
ab7cb0df 8426 struct rpc_cred *cred,
7c1d5fae
TM		 8427 bool privileged)
8428{
9aeda35f
BS		 8429 struct rpc_message msg = {
8430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8431 .rpc_cred = cred,
9aeda35f 8432 };
7c1d5fae
TM		 8433 struct rpc_task_setup task_setup = {
8434 .rpc_client = server->client,
8435 .rpc_message = &msg,
8436 .callback_ops = &nfs41_free_stateid_ops,
8437 .flags = RPC_TASK_ASYNC,
8438 };
8439 struct nfs_free_stateid_data *data;
9aeda35f 8440
3787d506
WAA		 8441 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8442 &task_setup.rpc_client, &msg);
8443
38527b15 8444 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8445 data = kmalloc(sizeof(*data), GFP_NOFS);
8446 if (!data)
8447 return ERR_PTR(-ENOMEM);
8448 data->server = server;
8449 nfs4_stateid_copy(&data->args.stateid, stateid);
8450
8451 task_setup.callback_data = data;
8452
8453 msg.rpc_argp = &data->args;
8454 msg.rpc_resp = &data->res;
a9c92d6b 8455 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8456 if (privileged)
8457 nfs4_set_sequence_privileged(&data->args.seq_args);
8458
8459 return rpc_run_task(&task_setup);
9aeda35f
BS		 8460}
8461
38527b15
CL		 8462/**
8463 * nfs41_free_stateid - perform a FREE_STATEID operation
8464 *
8465 * @server: server / transport on which to perform the operation
8466 * @stateid: state ID to release
ab7cb0df 8467 * @cred: credential
38527b15
CL		 8468 *
8469 * Returns NFS_OK if the server freed "stateid". Otherwise a
8470 * negative NFS4ERR value is returned.
8471 */
ab7cb0df
TM		 8472static int nfs41_free_stateid(struct nfs_server *server,
8473 nfs4_stateid *stateid,
8474 struct rpc_cred *cred)
9aeda35f 8475{
7c1d5fae
TM		 8476 struct rpc_task *task;
8477 int ret;
8478
ab7cb0df 8479 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8480 if (IS_ERR(task))
8481 return PTR_ERR(task);
8482 ret = rpc_wait_for_completion_task(task);
8483 if (!ret)
8484 ret = task->tk_status;
8485 rpc_put_task(task);
8486 return ret;
9aeda35f 8487}
36281caa 8488
f1cdae87
JL		 8489static void
8490nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8491{
8492 struct rpc_task *task;
ab7cb0df 8493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8494
ab7cb0df 8495 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8496 nfs4_free_lock_state(server, lsp);
8497 if (IS_ERR(task))
f1cdae87 8498 return;
c8b2d0bf 8499 rpc_put_task(task);
c8b2d0bf
TM		 8500}
8501
36281caa
TM		 8502static bool nfs41_match_stateid(const nfs4_stateid *s1,
8503 const nfs4_stateid *s2)
8504{
2d2f24ad 8505 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8506 return false;
8507
2d2f24ad 8508 if (s1->seqid == s2->seqid)
36281caa 8509 return true;
2d2f24ad 8510 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8511 return true;
8512
8513 return false;
8514}
8515
557134a3
AA		 8516#endif /* CONFIG_NFS_V4_1 */
8517
36281caa
TM		 8518static bool nfs4_match_stateid(const nfs4_stateid *s1,
8519 const nfs4_stateid *s2)
8520{
f597c537 8521 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8522}
8523
8524
17280175 8525static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8526 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8527 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8528 .recover_open = nfs4_open_reclaim,
8529 .recover_lock = nfs4_lock_reclaim,
591d71cb 8530 .establish_clid = nfs4_init_clientid,
05f4c350 8531 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8532};
8533
591d71cb 8534#if defined(CONFIG_NFS_V4_1)
17280175 8535static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8536 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8537 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8538 .recover_open = nfs4_open_reclaim,
8539 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8540 .establish_clid = nfs41_init_clientid,
fce5c838 8541 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8542 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8543};
8544#endif /* CONFIG_NFS_V4_1 */
8545
17280175 8546static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8547 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8548 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8549 .recover_open = nfs40_open_expired,
591d71cb
AA		 8550 .recover_lock = nfs4_lock_expired,
8551 .establish_clid = nfs4_init_clientid,
8552};
8553
8554#if defined(CONFIG_NFS_V4_1)
17280175 8555static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8556 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8557 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8558 .recover_open = nfs41_open_expired,
8559 .recover_lock = nfs41_lock_expired,
4d643d1d 8560 .establish_clid = nfs41_init_clientid,
1da177e4 8561};
591d71cb 8562#endif /* CONFIG_NFS_V4_1 */
1da177e4 8563
17280175 8564static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8565 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8566 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8567 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8568};
8569
8570#if defined(CONFIG_NFS_V4_1)
17280175 8571static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8572 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8573 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8574 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8575};
8576#endif
8577
ec011fe8 8578static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8579 .get_locations = _nfs40_proc_get_locations,
44c99933 8580 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8581};
8582
8583#if defined(CONFIG_NFS_V4_1)
8584static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8585 .get_locations = _nfs41_proc_get_locations,
44c99933 8586 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8587};
8588#endif /* CONFIG_NFS_V4_1 */
8589
97dc1359
TM		 8590static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8591 .minor_version = 0,
39c6daae
TM		 8592 .init_caps = NFS_CAP_READDIRPLUS
8593 | NFS_CAP_ATOMIC_OPEN
8594 | NFS_CAP_CHANGE_ATTR
8595 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8596 .init_client = nfs40_init_client,
8597 .shutdown_client = nfs40_shutdown_client,
36281caa 8598 .match_stateid = nfs4_match_stateid,
fca78d6d 8599 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8600 .free_lock_state = nfs4_release_lockowner,
63f5f796 8601 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8602 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8603 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8604 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8605 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8606 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8607};
8608
8609#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8610static struct nfs_seqid *
8611nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8612{
8613 return NULL;
8614}
8615
97dc1359
TM		 8616static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8617 .minor_version = 1,
39c6daae
TM		 8618 .init_caps = NFS_CAP_READDIRPLUS
8619 | NFS_CAP_ATOMIC_OPEN
8620 | NFS_CAP_CHANGE_ATTR
3b66486c 8621 | NFS_CAP_POSIX_LOCK
49f9a0fa 8622 | NFS_CAP_STATEID_NFSV41
e983120e 8623 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8624 .init_client = nfs41_init_client,
8625 .shutdown_client = nfs41_shutdown_client,
36281caa 8626 .match_stateid = nfs41_match_stateid,
fca78d6d 8627 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8628 .free_lock_state = nfs41_free_lock_state,
63f5f796 8629 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8630 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8631 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8632 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8633 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8634 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8635};
8636#endif
8637
42c2c424
SD		 8638#if defined(CONFIG_NFS_V4_2)
8639static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8640 .minor_version = 2,
7017310a
BS		 8641 .init_caps = NFS_CAP_READDIRPLUS
8642 | NFS_CAP_ATOMIC_OPEN
8643 | NFS_CAP_CHANGE_ATTR
8644 | NFS_CAP_POSIX_LOCK
8645 | NFS_CAP_STATEID_NFSV41
e983120e 8646 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8647 | NFS_CAP_ALLOCATE
624bd5b7 8648 | NFS_CAP_DEALLOCATE
e983120e 8649 | NFS_CAP_SEEK,
abf79bb3
CL		 8650 .init_client = nfs41_init_client,
8651 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8652 .match_stateid = nfs41_match_stateid,
8653 .find_root_sec = nfs41_find_root_sec,
7017310a 8654 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8655 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8656 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8657 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8658 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8659 .state_renewal_ops = &nfs41_state_renewal_ops,
8660};
8661#endif
8662
97dc1359
TM		 8663const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8664 [0] = &nfs_v4_0_minor_ops,
8665#if defined(CONFIG_NFS_V4_1)
8666 [1] = &nfs_v4_1_minor_ops,
8667#endif
42c2c424
SD		 8668#if defined(CONFIG_NFS_V4_2)
8669 [2] = &nfs_v4_2_minor_ops,
8670#endif
97dc1359
TM		 8671};
8672
17f26b12 8673static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8674 .create = nfs_create,
8675 .lookup = nfs_lookup,
8676 .atomic_open = nfs_atomic_open,
8677 .link = nfs_link,
8678 .unlink = nfs_unlink,
8679 .symlink = nfs_symlink,
8680 .mkdir = nfs_mkdir,
8681 .rmdir = nfs_rmdir,
8682 .mknod = nfs_mknod,
8683 .rename = nfs_rename,
8684 .permission = nfs_permission,
8685 .getattr = nfs_getattr,
8686 .setattr = nfs_setattr,
8687 .getxattr = generic_getxattr,
8688 .setxattr = generic_setxattr,
8689 .listxattr = generic_listxattr,
8690 .removexattr = generic_removexattr,
8691};
8692
92e1d5be 8693static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8694 .permission = nfs_permission,
8695 .getattr = nfs_getattr,
8696 .setattr = nfs_setattr,
64c2ce8b
AK		 8697 .getxattr = generic_getxattr,
8698 .setxattr = generic_setxattr,
8699 .listxattr = generic_listxattr,
8700 .removexattr = generic_removexattr,
6b3b5496
BF		 8701};
8702
509de811 8703const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8704 .version = 4, /* protocol version */
8705 .dentry_ops = &nfs4_dentry_operations,
8706 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8707 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8708 .file_ops = &nfs4_file_operations,
1da177e4 8709 .getroot = nfs4_proc_get_root,
281cad46 8710 .submount = nfs4_submount,
ff9099f2 8711 .try_mount = nfs4_try_mount,
1da177e4
LT		 8712 .getattr = nfs4_proc_getattr,
8713 .setattr = nfs4_proc_setattr,
8714 .lookup = nfs4_proc_lookup,
8715 .access = nfs4_proc_access,
8716 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8717 .create = nfs4_proc_create,
8718 .remove = nfs4_proc_remove,
8719 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8720 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8721 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8722 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8723 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8724 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8725 .link = nfs4_proc_link,
8726 .symlink = nfs4_proc_symlink,
8727 .mkdir = nfs4_proc_mkdir,
8728 .rmdir = nfs4_proc_remove,
8729 .readdir = nfs4_proc_readdir,
8730 .mknod = nfs4_proc_mknod,
8731 .statfs = nfs4_proc_statfs,
8732 .fsinfo = nfs4_proc_fsinfo,
8733 .pathconf = nfs4_proc_pathconf,
e9326dca 8734 .set_capabilities = nfs4_server_capabilities,
1da177e4 8735 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8736 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8737 .read_setup = nfs4_proc_read_setup,
ec06c096 8738 .read_done = nfs4_read_done,
1da177e4 8739 .write_setup = nfs4_proc_write_setup,
788e7a89 8740 .write_done = nfs4_write_done,
1da177e4 8741 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8742 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8743 .commit_done = nfs4_commit_done,
1da177e4 8744 .lock = nfs4_proc_lock,
e50a1c2e 8745 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8746 .close_context = nfs4_close_context,
2b484297 8747 .open_context = nfs4_atomic_open,
011e2a7f 8748 .have_delegation = nfs4_have_delegation,
57ec14c5 8749 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8750 .alloc_client = nfs4_alloc_client,
45a52a02 8751 .init_client = nfs4_init_client,
cdb7eced 8752 .free_client = nfs4_free_client,
1179acc6
BS		 8753 .create_server = nfs4_create_server,
8754 .clone_server = nfs_clone_server,
1da177e4
LT		 8755};
8756
64c2ce8b
AK		 8757static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8758 .prefix = XATTR_NAME_NFSV4_ACL,
8759 .list = nfs4_xattr_list_nfs4_acl,
8760 .get = nfs4_xattr_get_nfs4_acl,
8761 .set = nfs4_xattr_set_nfs4_acl,
8762};
8763
8764const struct xattr_handler *nfs4_xattr_handlers[] = {
8765 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8766#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8767 &nfs4_xattr_nfs4_label_handler,
8768#endif
64c2ce8b
AK		 8769 NULL
8770};
8771
1da177e4
LT		 8772/*
8773 * Local variables:
8774 * c-basic-offset: 8
8775 * End:
8776 */
Linux 6.x block layer and io_uring tree(s)