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sunrpc: add a new "stringify_acceptor" rpc_credop
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
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 */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
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 */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
cab92c19 542 if (slot == NULL)
3bd2384a
CL		 543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
a13ce7c6 562 struct nfs4_slot *slot = res->sr_slot;
c10e4498 563 bool send_new_highest_used_slotid = false;
13615871 564
a13ce7c6 565 tbl = slot->table;
e3725ec0 566 session = tbl->session;
ea028ac9 567
35dc1d74 568 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
a13ce7c6 575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
a13ce7c6 579 nfs4_free_slot(tbl, slot);
c10e4498
TM		 580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
b75ad4cd 583out_unlock:
35dc1d74 584 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 585 res->sr_slot = NULL;
c10e4498
TM		 586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 588}
589
f9c96fcc 590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 591{
e3725ec0 592 struct nfs4_session *session;
a13ce7c6 593 struct nfs4_slot *slot = res->sr_slot;
14516c3a 594 struct nfs_client *clp;
ac20d163 595 bool interrupted = false;
85563073 596 int ret = 1;
b0df806c 597
a13ce7c6
TM		 598 if (slot == NULL)
599 goto out_noaction;
468f8613
BS		 600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
b0df806c
AA		 602 goto out;
603
e3725ec0 604 session = slot->table->session;
933602e3 605
ac20d163
TM		 606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
2f92ae34 611 trace_nfs4_sequence_done(session, res);
691daf3b 612 /* Check the SEQUENCE operation status */
14516c3a
TM		 613 switch (res->sr_status) {
614 case 0:
b0df806c 615 /* Update the slot's sequence and clientid lease timer */
933602e3 616 ++slot->seq_nr;
e3725ec0 617 clp = session->clp;
8e63b6a8 618 do_renew_lease(clp, res->sr_timestamp);
0629e370 619 /* Check sequence flags */
b4410c2f
TM		 620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
464ee9f9 622 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 623 break;
ac20d163
TM		 624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
14516c3a
TM		 633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
df2fabff 638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 639 __func__,
df2fabff 640 slot->slot_nr,
933602e3 641 slot->seq_nr);
14516c3a 642 goto out_retry;
85563073
TM		 643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
e8794440
TM		 648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 650 /*
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
e8794440
TM		 658 /*
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
8e63b6a8
TM		 662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
e8794440
TM		 667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
14516c3a
TM		 670 default:
671 /* Just update the slot sequence no. */
933602e3 672 ++slot->seq_nr;
b0df806c
AA		 673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 677 nfs41_sequence_free_slot(res);
a13ce7c6 678out_noaction:
85563073 679 return ret;
e8794440
TM		 680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
14516c3a 686out_retry:
d05dd4e9 687 if (!rpc_restart_call(task))
14516c3a
TM		 688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
b0df806c 691}
f9c96fcc 692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 693
14516c3a
TM		 694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455
TM		 702}
703
dc70d7b3 704int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
ce5039c1
AA		 707 struct rpc_task *task)
708{
fbcd4abc
AA		 709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 711
712 dprintk("--> %s\n", __func__);
ce5039c1 713 /* slot already allocated? */
dfb4f309 714 if (res->sr_slot != NULL)
d9afbd1b 715 goto out_success;
ce5039c1 716
fbcd4abc
AA		 717 tbl = &session->fc_slot_table;
718
69d206b5
TM		 719 task->tk_timeout = 0;
720
fbcd4abc 721 spin_lock(&tbl->slot_tbl_lock);
774d5f14 722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 723 !args->sa_privileged) {
0b1c8fc4 724 /* The state manager will wait until the slot table is empty */
0b1c8fc4 725 dprintk("%s session is draining\n", __func__);
7b939a3f 726 goto out_sleep;
689cf5c1
AB		 727 }
728
2dc03b7f 729 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
fbcd4abc 734 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 735 goto out_sleep;
fbcd4abc
AA		 736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
2b2fa717 739 args->sa_slot = slot;
fbcd4abc 740
e8d92382 741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 742 slot->slot_nr, slot->seq_nr);
fbcd4abc 743
dfb4f309 744 res->sr_slot = slot;
8e63b6a8 745 res->sr_timestamp = jiffies;
2a6e26cd 746 res->sr_status_flags = 0;
fbcd4abc
AA		 747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
2f92ae34 752 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 753out_success:
754 rpc_call_start(task);
ce5039c1 755 return 0;
7b939a3f 756out_sleep:
8fe72bac
TM		 757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
1e1093c7
TM		 759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
ce5039c1 765}
dc70d7b3 766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 767
5a580e0a
CL		 768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
ce5039c1 772{
035168ab 773 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 774 int ret = 0;
775
3bd2384a
CL		 776 if (!session)
777 return nfs40_setup_sequence(server, args, res, task);
035168ab 778
e8d92382 779 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 780 __func__, session->clp, session, res->sr_slot ?
e8d92382 781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 782
9d12b216 783 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 784
ce5039c1
AA		 785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
ce5039c1
AA		 789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
2a3eb2b9 791 struct nfs4_call_sync_data *data = calldata;
6ba7db34 792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 793
035168ab
TM		 794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
d9afbd1b 796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 797}
798
69ab40c4
AA		 799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
69ab40c4 802
14516c3a 803 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 804}
805
17280175 806static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 807 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 808 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 809};
810
3bd2384a
CL		 811#else /* !CONFIG_NFS_V4_1 */
812
9915ea7e
CL		 813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
3bd2384a 818 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 819}
820
821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
823{
3bd2384a 824 return nfs40_sequence_done(task, res);
9915ea7e 825}
3bd2384a
CL		 826
827#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 828
829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
7c513058
BS		 847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
ce5039c1
AA		 849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
8fe72bac 851 struct nfs4_sequence_res *res)
ce5039c1
AA		 852{
853 int ret;
854 struct rpc_task *task;
9915ea7e 855 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 856 struct nfs4_call_sync_data data = {
035168ab 857 .seq_server = server,
ce5039c1
AA		 858 .seq_args = args,
859 .seq_res = res,
ce5039c1
AA		 860 };
861 struct rpc_task_setup task_setup = {
7c513058 862 .rpc_client = clnt,
ce5039c1 863 .rpc_message = msg,
9915ea7e 864 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 865 .callback_data = &data
866 };
867
ce5039c1
AA		 868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
873 rpc_put_task(task);
874 }
875 return ret;
876}
877
fd0c0953 878static
7c513058
BS		 879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
e73b83f2
BS		 881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
a9c92d6b 886 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 888}
cccef3b9 889
38478b24 890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 891{
38478b24 892 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 893
38478b24 894 spin_lock(&dir->i_lock);
359d7d1c 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 896 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 897 nfs_force_lookup_revalidate(dir);
a9a4a87a 898 dir->i_version = cinfo->after;
de242c0b 899 nfs_fscache_invalidate(dir);
38478b24 900 spin_unlock(&dir->i_lock);
1da177e4
LT		 901}
902
e56e0b78 903struct nfs4_opendata {
c6d00e63 904 struct kref kref;
e56e0b78
TM		 905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
cdd4e68b
TM		 907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
6926afd1
TM		 909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
e56e0b78 911 struct nfs_fattr f_attr;
1775fd3e 912 struct nfs4_label *f_label;
e56e0b78 913 struct dentry *dir;
82a2c1b7 914 struct dentry *dentry;
e56e0b78 915 struct nfs4_state_owner *owner;
aac00a8d 916 struct nfs4_state *state;
e56e0b78 917 struct iattr attrs;
26e976a8 918 unsigned long timestamp;
3e309914 919 unsigned int rpc_done : 1;
5bc2afc2 920 unsigned int file_created : 1;
bdeca1b7 921 unsigned int is_recover : 1;
24ac23ab
TM		 922 int rpc_status;
923 int cancelled;
e56e0b78
TM		 924};
925
49f9a0fa
TM		 926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
2ced46c2
TM		 955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
957{
958 p->o_res.f_attr = &p->f_attr;
1775fd3e 959 p->o_res.f_label = p->f_label;
c1d51931
TM		 960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 962 p->o_res.server = p->o_arg.server;
5f657530 963 p->o_res.access_request = p->o_arg.access;
2ced46c2 964 nfs_fattr_init(&p->f_attr);
6926afd1 965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 966}
967
82a2c1b7 968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 970 const struct iattr *attrs,
1775fd3e 971 struct nfs4_label *label,
4a1c0893 972 enum open_claim_type4 claim,
8535b2be 973 gfp_t gfp_mask)
e56e0b78 974{
82a2c1b7 975 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
8535b2be 980 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 981 if (p == NULL)
982 goto err;
14c43f76
DQ		 983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
8535b2be 988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 989 if (p->o_arg.seqid == NULL)
14c43f76 990 goto err_free_label;
82a2c1b7
AV		 991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
e56e0b78
TM		 993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
dc0b027d
TM		 996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1005 }
7539bbab 1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1009 p->o_arg.name = &dentry->d_name;
e56e0b78 1010 p->o_arg.server = server;
aa9c2669 1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1013 p->o_arg.label = label;
49f9a0fa
TM		 1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
4a1c0893
TM		 1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
536e43d1 1027 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1028 __u32 verf[2];
d77d76ff 1029
e56e0b78
TM		 1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1037 }
cdd4e68b
TM		 1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1041 nfs4_init_opendata_res(p);
c6d00e63 1042 kref_init(&p->kref);
e56e0b78 1043 return p;
14c43f76
DQ		 1044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
e56e0b78
TM		 1048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
c6d00e63 1054static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1055{
c6d00e63
TM		 1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
82a2c1b7 1058 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1059
1060 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
c6d00e63 1063 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1064
1065 nfs4_label_free(p->f_label);
1066
c6d00e63 1067 dput(p->dir);
82a2c1b7
AV		 1068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
6926afd1 1070 nfs_fattr_free_names(&p->f_attr);
e911b815 1071 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1072 kfree(p);
1073}
1074
1075static void nfs4_opendata_put(struct nfs4_opendata *p)
1076{
1077 if (p != NULL)
1078 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1079}
1080
06f814a3
TM		 1081static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1082{
06f814a3
TM		 1083 int ret;
1084
06f814a3 1085 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1086 return ret;
1087}
1088
dc0b027d 1089static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1090{
1091 int ret = 0;
dc0b027d 1092
536e43d1 1093 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1094 goto out;
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1096 case FMODE_READ:
88069f77
TM		 1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
6ee41268
TM		 1099 break;
1100 case FMODE_WRITE:
88069f77
TM		 1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
6ee41268 1107 }
dc0b027d 1108out:
6ee41268
TM		 1109 return ret;
1110}
1111
dc0b027d 1112static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1113{
652f89f6
TM		 1114 if (delegation == NULL)
1115 return 0;
dc0b027d 1116 if ((delegation->type & fmode) != fmode)
aac00a8d 1117 return 0;
15c831bf 1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1119 return 0;
d25be546
TM		 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
b7391f44 1122 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1123 return 1;
1124}
1125
dc0b027d 1126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1127{
dc0b027d 1128 switch (fmode) {
e7616923
TM		 1129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
dc0b027d 1138 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1139}
1140
4f14c194
TM		 1141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
e999e80e
TM		 1156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
4f14c194
TM		 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1163 return true;
4f14c194 1164 }
e999e80e
TM		 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
226056c5
TM		 1170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1172{
226056c5
TM		 1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
003707c7 1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
4f14c194
TM		 1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1202}
1203
dc0b027d 1204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1205{
dc0b027d 1206 switch (fmode) {
003707c7
TM		 1207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
e999e80e
TM		 1216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1221}
1222
dc0b027d 1223static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1224{
8bda4e4c
TM		 1225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
003707c7 1230 if (deleg_stateid != NULL) {
f597c537 1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
dc0b027d 1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
dc0b027d 1238 update_open_stateflags(state, fmode);
ec073428 1239 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1240}
1241
dc0b027d 1242static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
dc0b027d 1248 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
17f26b12 1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1258 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
f597c537 1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1264 goto no_delegation_unlock;
1265
b7391f44 1266 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
dc0b027d 1275 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1276 ret = 1;
1277 }
4f14c194
TM		 1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1280
1281 return ret;
1282}
1283
1284
dc0b027d 1285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
57ec14c5 1296 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1297}
1298
6ee41268 1299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
f448badd 1304 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1305 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
aac00a8d 1309 for (;;) {
dc0b027d 1310 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1311 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
6ee41268 1314 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1315 goto out_return_state;
1316 }
1317 spin_unlock(&state->owner->so_lock);
1318 }
34310430
TM		 1319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1321 if (!can_open_delegated(delegation, fmode)) {
34310430 1322 rcu_read_unlock();
aac00a8d 1323 break;
34310430 1324 }
aac00a8d 1325 /* Save the delegation */
f597c537 1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1327 rcu_read_unlock();
fa332941 1328 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
aac00a8d 1334 ret = -EAGAIN;
34310430
TM		 1335
1336 /* Try to update the stateid using the delegation */
dc0b027d 1337 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1338 goto out_return_state;
aac00a8d 1339 }
aac00a8d
TM		 1340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
e23008ec
AA		 1347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
d2bfda2e
WAA		 1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
e23008ec
AA		 1392 }
1393
e23008ec
AA		 1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1400update:
e23008ec
AA		 1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
d49f042a 1403 atomic_inc(&state->count);
e23008ec
AA		 1404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1b370bc2 1416 int ret;
24ac23ab 1417
aac00a8d 1418 if (!data->rpc_done) {
6ee41268 1419 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1420 goto out;
1421 }
1422
1b370bc2 1423 ret = -EAGAIN;
24ac23ab 1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1425 goto err;
1775fd3e 1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1427 ret = PTR_ERR(inode);
03f28e3a 1428 if (IS_ERR(inode))
1b370bc2
TM		 1429 goto err;
1430 ret = -ENOMEM;
24ac23ab
TM		 1431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
1b370bc2 1433 goto err_put_inode;
e23008ec
AA		 1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
34310430 1436 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1437 data->o_arg.fmode);
24ac23ab 1438 iput(inode);
aac00a8d 1439out:
7aa262b5 1440 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1441 return state;
1b370bc2
TM		 1442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
24ac23ab
TM		 1446}
1447
e23008ec
AA		 1448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
864472e9
TM		 1456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
4a1c0893
TM		 1473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1475{
1476 struct nfs4_opendata *opendata;
1477
4a1c0893 1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1479 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
dc0b027d 1487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1488{
2ced46c2 1489 struct nfs4_state *newstate;
864472e9
TM		 1490 int ret;
1491
dc0b027d
TM		 1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
b257957e 1497 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1498 if (ret != 0)
1499 return ret;
2ced46c2 1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
643168c2 1503 nfs4_close_state(newstate, fmode);
2ced46c2 1504 *res = newstate;
864472e9
TM		 1505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
864472e9 1510 struct nfs4_state *newstate;
864472e9
TM		 1511 int ret;
1512
4f14c194
TM		 1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1517 /* memory barrier prior to reading state->n_* */
2ced46c2 1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1519 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1520 smp_rmb();
1521 if (state->n_rdwr != 0) {
2ced46c2 1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1523 if (ret != 0)
1524 return ret;
2ced46c2
TM		 1525 if (newstate != state)
1526 return -ESTALE;
864472e9
TM		 1527 }
1528 if (state->n_wronly != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_rdonly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9 1541 }
1ac7e2fd
TM		 1542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1548 write_seqlock(&state->seqlock);
1ac7e2fd 1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1551 write_sequnlock(&state->seqlock);
1ac7e2fd 1552 }
864472e9
TM		 1553 return 0;
1554}
1555
1da177e4
LT		 1556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
1da177e4 1559 */
539cd03a 1560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1561{
1ac7e2fd 1562 struct nfs_delegation *delegation;
864472e9 1563 struct nfs4_opendata *opendata;
dc0b027d 1564 fmode_t delegation_type = 0;
1da177e4
LT		 1565 int status;
1566
4a1c0893
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1ac7e2fd
TM		 1571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1574 delegation_type = delegation->type;
1ac7e2fd 1575 rcu_read_unlock();
864472e9
TM		 1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
c6d00e63 1578 nfs4_opendata_put(opendata);
1da177e4
LT		 1579 return status;
1580}
1581
539cd03a 1582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
539cd03a 1588 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1589 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
168667c4 1592 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1593 break;
1594 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1595 } while (exception.retry);
1596 return err;
1597}
1598
864472e9
TM		 1599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
91876b13 1606 return -EAGAIN;
539cd03a 1607 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
db4f2e63 1612static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1613{
be76b5b6
TM		 1614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
352297b9
CL		 1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
8ef2f8d4
CL		 1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
be76b5b6
TM		 1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
db4f2e63 1646 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1650 return 0;
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
db4f2e63
TM		 1656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
be76b5b6 1660 }
1da177e4
LT		 1661 return err;
1662}
1663
db4f2e63
TM		 1664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
be05c860
CL		 1680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
17ead6c8
TM		 1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
be05c860
CL		 1686}
1687
cdd4e68b
TM		 1688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
17ead6c8 1692 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1693
cdd4e68b 1694 data->rpc_status = task->tk_status;
26e976a8 1695 if (data->rpc_status == 0) {
f597c537 1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1698 renew_lease(data->o_res.server, data->timestamp);
3e309914 1699 data->rpc_done = 1;
26e976a8 1700 }
cdd4e68b
TM		 1701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
3e309914 1712 if (!data->rpc_done)
cdd4e68b 1713 goto out_free;
cdd4e68b 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
cdd4e68b
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
1da177e4
LT		 1748 int status;
1749
17ead6c8 1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
5138fde0 1754 data->timestamp = jiffies;
c970aa85 1755 task = rpc_run_task(&task_setup_data);
7a1218a2 1756 if (IS_ERR(task))
cdd4e68b 1757 return PTR_ERR(task);
cdd4e68b
TM		 1758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
e6b3c4db 1764 rpc_put_task(task);
1da177e4
LT		 1765 return status;
1766}
1767
24ac23ab 1768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1769{
24ac23ab
TM		 1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
549b19cc 1772 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1773
24ac23ab 1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1775 goto out_wait;
aac00a8d
TM		 1776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
dc0b027d 1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1784 goto out_no_action;
aac00a8d
TM		 1785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
aac00a8d
TM		 1791 rcu_read_unlock();
1792 }
95b72eb0 1793 /* Update client id. */
549b19cc 1794 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
26e976a8 1804 data->timestamp = jiffies;
035168ab 1805 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1806 &data->o_arg.seq_args,
2240a9e2
TM		 1807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
6ee41268 1820 return;
652f89f6
TM		 1821unlock_no_action:
1822 rcu_read_unlock();
6ee41268
TM		 1823out_no_action:
1824 task->tk_action = NULL;
c8da19b9 1825out_wait:
b75ad4cd 1826 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1827}
1828
24ac23ab
TM		 1829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
1da177e4 1832
24ac23ab 1833 data->rpc_status = task->tk_status;
d898528c 1834
14516c3a
TM		 1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
d898528c 1837
24ac23ab 1838 if (task->tk_status == 0) {
807d66d8
TM		 1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
24ac23ab 1844 data->rpc_status = -ELOOP;
6f926b5b
TM		 1845 break;
1846 case S_IFDIR:
24ac23ab 1847 data->rpc_status = -EISDIR;
6f926b5b
TM		 1848 break;
1849 default:
24ac23ab 1850 data->rpc_status = -ENOTDIR;
807d66d8 1851 }
6f926b5b 1852 }
26e976a8 1853 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1856 }
3e309914 1857 data->rpc_done = 1;
24ac23ab 1858}
6f926b5b 1859
24ac23ab
TM		 1860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
3e309914 1869 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
24ac23ab 1874 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1875 if (!IS_ERR(state))
643168c2 1876 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1877out_free:
c6d00e63 1878 nfs4_opendata_put(data);
24ac23ab
TM		 1879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
b257957e 1887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
5138fde0
TM		 1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
c970aa85
TM		 1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
5138fde0 1902 .rpc_message = &msg,
c970aa85
TM		 1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
101070ca 1905 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1906 .flags = RPC_TASK_ASYNC,
1907 };
24ac23ab
TM		 1908 int status;
1909
a9c92d6b 1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1911 kref_get(&data->kref);
3e309914
TM		 1912 data->rpc_done = 0;
1913 data->rpc_status = 0;
2ced46c2 1914 data->cancelled = 0;
bdeca1b7
TM		 1915 data->is_recover = 0;
1916 if (isrecover) {
8fe72bac 1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1918 data->is_recover = 1;
1919 }
c970aa85 1920 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
6926afd1
TM		 1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
b257957e
AB		 1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
f3792d63
TM		 1955/*
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1959 * the same.
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1962 */
6168f62c
WAA		 1963static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1965 struct nfs4_state *state, fmode_t fmode,
1966 int openflags)
6168f62c
WAA		 1967{
1968 struct nfs_access_entry cache;
1969 u32 mask;
1970
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1974 return 0;
1975
1976 mask = 0;
f3792d63
TM		 1977 /*
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1980 */
f8d9a897
WAA		 1981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1983 mask = MAY_EXEC;
f3792d63 1984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1985 mask = MAY_READ;
6168f62c
WAA		 1986
1987 cache.cred = cred;
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1991
bbd3a8ee 1992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1993 return 0;
1994
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
998f40b5 1997 return -EACCES;
6168f62c
WAA		 1998}
1999
b257957e
AB		 2000/*
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2002 */
2003static int _nfs4_proc_open(struct nfs4_opendata *data)
2004{
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2012 if (!data->rpc_done)
2013 return status;
2014 if (status != 0) {
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2017 return -ENOENT;
24ac23ab 2018 return status;
08ef7bd3 2019 }
24ac23ab 2020
6926afd1
TM		 2021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2022
5bc2afc2 2023 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2024 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2029 }
0df5dd4a
TM		 2030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2033 status = _nfs4_proc_open_confirm(data);
1da177e4 2034 if (status != 0)
24ac23ab 2035 return status;
1da177e4
LT		 2036 }
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2039 return 0;
1da177e4
LT		 2040}
2041
d83217c1
AA		 2042static int nfs4_recover_expired_lease(struct nfs_server *server)
2043{
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2045}
2046
1da177e4
LT		 2047/*
2048 * OPEN_EXPIRED:
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2051 */
539cd03a 2052static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2053{
e56e0b78 2054 struct nfs4_opendata *opendata;
864472e9 2055 int ret;
1da177e4 2056
4a1c0893 2057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2058 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
864472e9 2061 ret = nfs4_open_recover(opendata, state);
35d05778 2062 if (ret == -ESTALE)
3d4ff43d 2063 d_drop(ctx->dentry);
c6d00e63 2064 nfs4_opendata_put(opendata);
864472e9 2065 return ret;
1da177e4
LT		 2066}
2067
a9ed2e25 2068static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2069{
539cd03a 2070 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2071 struct nfs4_exception exception = { };
2072 int err;
2073
2074 do {
539cd03a 2075 err = _nfs4_open_expired(ctx, state);
42113a75 2076 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2078 continue;
a9ed2e25
TM		 2079 switch (err) {
2080 default:
2081 goto out;
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2085 err = 0;
2086 }
202b50dc 2087 } while (exception.retry);
a9ed2e25 2088out:
202b50dc
TM		 2089 return err;
2090}
2091
1da177e4
LT		 2092static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
1da177e4 2094 struct nfs_open_context *ctx;
864472e9 2095 int ret;
1da177e4 2096
864472e9
TM		 2097 ctx = nfs4_state_find_open_context(state);
2098 if (IS_ERR(ctx))
91876b13 2099 return -EAGAIN;
539cd03a 2100 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2101 put_nfs_open_context(ctx);
2102 return ret;
1da177e4
LT		 2103}
2104
f062eb6c 2105#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2106static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2107{
f062eb6c 2108 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2109 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2110 struct nfs_delegation *delegation;
2111 struct rpc_cred *cred = NULL;
2112 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2113
2114 /* If a state reset has been done, test_stateid is unneeded */
2115 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2116 return;
2117
ab7cb0df
TM		 2118 /* Get the delegation credential for use by test/free_stateid */
2119 rcu_read_lock();
2120 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2121 if (delegation != NULL &&
2122 nfs4_stateid_match(&delegation->stateid, stateid)) {
2123 cred = get_rpccred(delegation->cred);
2124 rcu_read_unlock();
2125 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2126 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2127 } else
2128 rcu_read_unlock();
2129
3e60ffdd
CL		 2130 if (status != NFS_OK) {
2131 /* Free the stateid unless the server explicitly
2132 * informs us the stateid is unrecognized. */
2133 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2134 nfs41_free_stateid(server, stateid, cred);
6938867e 2135 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2136
6938867e
BS		 2137 write_seqlock(&state->seqlock);
2138 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2139 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2140 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2141 }
ab7cb0df
TM		 2142
2143 if (cred != NULL)
2144 put_rpccred(cred);
3e60ffdd
CL		 2145}
2146
2147/**
2148 * nfs41_check_open_stateid - possibly free an open stateid
2149 *
2150 * @state: NFSv4 state for an inode
2151 *
2152 * Returns NFS_OK if recovery for this stateid is now finished.
2153 * Otherwise a negative NFS4ERR value is returned.
2154 */
2155static int nfs41_check_open_stateid(struct nfs4_state *state)
2156{
2157 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2158 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2159 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2160 int status;
2161
2162 /* If a state reset has been done, test_stateid is unneeded */
2163 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2164 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2165 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2166 return -NFS4ERR_BAD_STATEID;
2167
ab7cb0df 2168 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2169 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2170 if (status != NFS_OK) {
2171 /* Free the stateid unless the server explicitly
2172 * informs us the stateid is unrecognized. */
2173 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2174 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2175
2176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2178 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2179 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2180 }
2181 return status;
2182}
2183
2184static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2185{
eb64cf96 2186 int status;
b01dd1d8 2187
3e60ffdd
CL		 2188 nfs41_clear_delegation_stateid(state);
2189 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2190 if (status != NFS_OK)
2191 status = nfs4_open_expired(sp, state);
2192 return status;
f062eb6c
BS		 2193}
2194#endif
2195
aa53ed54
JL		 2196/*
2197 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2198 * fields corresponding to attributes that were used to store the verifier.
2199 * Make sure we clobber those fields in the later setattr call
2200 */
2201static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2202{
2203 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2204 !(sattr->ia_valid & ATTR_ATIME_SET))
2205 sattr->ia_valid |= ATTR_ATIME;
2206
2207 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2208 !(sattr->ia_valid & ATTR_MTIME_SET))
2209 sattr->ia_valid |= ATTR_MTIME;
2210}
2211
c21443c2
TM		 2212static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2213 fmode_t fmode,
2214 int flags,
3efb9722 2215 struct nfs_open_context *ctx)
c21443c2
TM		 2216{
2217 struct nfs4_state_owner *sp = opendata->owner;
2218 struct nfs_server *server = sp->so_server;
275bb307 2219 struct dentry *dentry;
c21443c2
TM		 2220 struct nfs4_state *state;
2221 unsigned int seq;
2222 int ret;
2223
2224 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2225
2226 ret = _nfs4_proc_open(opendata);
2227 if (ret != 0)
2228 goto out;
2229
2230 state = nfs4_opendata_to_nfs4_state(opendata);
2231 ret = PTR_ERR(state);
2232 if (IS_ERR(state))
2233 goto out;
2234 if (server->caps & NFS_CAP_POSIX_LOCK)
2235 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2236
275bb307
TM		 2237 dentry = opendata->dentry;
2238 if (dentry->d_inode == NULL) {
2239 /* FIXME: Is this d_drop() ever needed? */
2240 d_drop(dentry);
2241 dentry = d_add_unique(dentry, igrab(state->inode));
2242 if (dentry == NULL) {
2243 dentry = opendata->dentry;
2244 } else if (dentry != ctx->dentry) {
2245 dput(ctx->dentry);
2246 ctx->dentry = dget(dentry);
2247 }
2248 nfs_set_verifier(dentry,
2249 nfs_save_change_attribute(opendata->dir->d_inode));
2250 }
2251
c21443c2
TM		 2252 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2253 if (ret != 0)
2254 goto out;
2255
3efb9722 2256 ctx->state = state;
c45ffdd2
TM		 2257 if (dentry->d_inode == state->inode) {
2258 nfs_inode_attach_open_context(ctx);
2259 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2260 nfs4_schedule_stateid_recovery(server, state);
2261 }
c21443c2
TM		 2262out:
2263 return ret;
2264}
2265
1da177e4 2266/*
24ac23ab 2267 * Returns a referenced nfs4_state
1da177e4 2268 */
82be417a 2269static int _nfs4_do_open(struct inode *dir,
4197a055 2270 struct nfs_open_context *ctx,
82be417a
AA		 2271 int flags,
2272 struct iattr *sattr,
5bc2afc2
TM		 2273 struct nfs4_label *label,
2274 int *opened)
1da177e4
LT		 2275{
2276 struct nfs4_state_owner *sp;
2277 struct nfs4_state *state = NULL;
2278 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2279 struct nfs4_opendata *opendata;
4197a055
TM		 2280 struct dentry *dentry = ctx->dentry;
2281 struct rpc_cred *cred = ctx->cred;
2282 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2283 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2284 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2285 struct nfs4_label *olabel = NULL;
aac00a8d 2286 int status;
1da177e4
LT		 2287
2288 /* Protect against reboot recovery conflicts */
1da177e4 2289 status = -ENOMEM;
d1e284d5
TM		 2290 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2291 if (sp == NULL) {
1da177e4
LT		 2292 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2293 goto out_err;
2294 }
58d9714a
TM		 2295 status = nfs4_recover_expired_lease(server);
2296 if (status != 0)
b4454fe1 2297 goto err_put_state_owner;
82a2c1b7
AV		 2298 if (dentry->d_inode != NULL)
2299 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2300 status = -ENOMEM;
49f9a0fa
TM		 2301 if (dentry->d_inode)
2302 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2303 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2304 label, claim, GFP_KERNEL);
e56e0b78 2305 if (opendata == NULL)
95d35cb4 2306 goto err_put_state_owner;
1da177e4 2307
14c43f76
DQ		 2308 if (label) {
2309 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2310 if (IS_ERR(olabel)) {
2311 status = PTR_ERR(olabel);
2312 goto err_opendata_put;
2313 }
2314 }
2315
e911b815
TM		 2316 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2317 if (!opendata->f_attr.mdsthreshold) {
2318 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2319 if (!opendata->f_attr.mdsthreshold)
2320 goto err_free_label;
2321 }
1549210f 2322 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2323 }
82a2c1b7
AV		 2324 if (dentry->d_inode != NULL)
2325 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2326
3efb9722 2327 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2328 if (status != 0)
14c43f76 2329 goto err_free_label;
3efb9722 2330 state = ctx->state;
6168f62c 2331
549b19cc
TM		 2332 if ((opendata->o_arg.open_flags & O_EXCL) &&
2333 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2334 nfs4_exclusive_attrset(opendata, sattr);
2335
2336 nfs_fattr_init(opendata->o_res.f_attr);
2337 status = nfs4_do_setattr(state->inode, cred,
2338 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2339 state, label, olabel);
2340 if (status == 0) {
0ab64e0e 2341 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2342 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2343 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2344 }
0ab64e0e 2345 }
5bc2afc2
TM		 2346 if (opendata->file_created)
2347 *opened |= FILE_CREATED;
82be417a 2348
e911b815 2349 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2350 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2351 opendata->f_attr.mdsthreshold = NULL;
2352 }
82be417a 2353
14c43f76
DQ		 2354 nfs4_label_free(olabel);
2355
c6d00e63 2356 nfs4_opendata_put(opendata);
1da177e4 2357 nfs4_put_state_owner(sp);
1da177e4 2358 return 0;
14c43f76
DQ		 2359err_free_label:
2360 nfs4_label_free(olabel);
c6d00e63
TM		 2361err_opendata_put:
2362 nfs4_opendata_put(opendata);
e56e0b78
TM		 2363err_put_state_owner:
2364 nfs4_put_state_owner(sp);
1da177e4 2365out_err:
1da177e4
LT		 2366 return status;
2367}
2368
2369
82be417a 2370static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2371 struct nfs_open_context *ctx,
82be417a
AA		 2372 int flags,
2373 struct iattr *sattr,
5bc2afc2
TM		 2374 struct nfs4_label *label,
2375 int *opened)
1da177e4 2376{
49f9a0fa 2377 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2378 struct nfs4_exception exception = { };
2379 struct nfs4_state *res;
2380 int status;
2381
2382 do {
5bc2afc2 2383 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2384 res = ctx->state;
42113a75 2385 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2386 if (status == 0)
2387 break;
2388 /* NOTE: BAD_SEQID means the server and client disagree about the
2389 * book-keeping w.r.t. state-changing operations
2390 * (OPEN/CLOSE/LOCK/LOCKU...)
2391 * It is actually a sign of a bug on the client or on the server.
2392 *
2393 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2394 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2395 * have unhashed the old state_owner for us, and that we can
2396 * therefore safely retry using a new one. We should still warn
2397 * the user though...
2398 */
2399 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2400 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2401 " returned a bad sequence-id error!\n",
2402 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2403 exception.retry = 1;
2404 continue;
2405 }
550f5747
TM		 2406 /*
2407 * BAD_STATEID on OPEN means that the server cancelled our
2408 * state before it received the OPEN_CONFIRM.
2409 * Recover by retrying the request as per the discussion
2410 * on Page 181 of RFC3530.
2411 */
2412 if (status == -NFS4ERR_BAD_STATEID) {
2413 exception.retry = 1;
2414 continue;
2415 }
aac00a8d
TM		 2416 if (status == -EAGAIN) {
2417 /* We must have found a delegation */
2418 exception.retry = 1;
2419 continue;
2420 }
49f9a0fa
TM		 2421 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2422 continue;
2423 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2424 status, &exception));
2425 } while (exception.retry);
2426 return res;
2427}
2428
659bfcd6
TM		 2429static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2430 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2431 struct nfs4_state *state, struct nfs4_label *ilabel,
2432 struct nfs4_label *olabel)
1da177e4 2433{
3e4f6290 2434 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2435 struct nfs_setattrargs arg = {
3e4f6290 2436 .fh = NFS_FH(inode),
1da177e4
LT		 2437 .iap = sattr,
2438 .server = server,
2439 .bitmask = server->attr_bitmask,
1775fd3e 2440 .label = ilabel,
1da177e4
LT		 2441 };
2442 struct nfs_setattrres res = {
2443 .fattr = fattr,
1775fd3e 2444 .label = olabel,
1da177e4
LT		 2445 .server = server,
2446 };
2447 struct rpc_message msg = {
659bfcd6
TM		 2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2449 .rpc_argp = &arg,
2450 .rpc_resp = &res,
2451 .rpc_cred = cred,
1da177e4 2452 };
26e976a8 2453 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2454 fmode_t fmode;
2455 bool truncate;
65e4308d 2456 int status;
1da177e4 2457
aa9c2669
DQ		 2458 arg.bitmask = nfs4_bitmask(server, ilabel);
2459 if (ilabel)
2460 arg.bitmask = nfs4_bitmask(server, olabel);
2461
0e574af1 2462 nfs_fattr_init(fattr);
1da177e4 2463
ee3ae84e
TM		 2464 /* Servers should only apply open mode checks for file size changes */
2465 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2466 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2467
2468 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2469 /* Use that stateid */
0418dae1 2470 } else if (truncate && state != NULL) {
2a369153
TM		 2471 struct nfs_lockowner lockowner = {
2472 .l_owner = current->files,
2473 .l_pid = current->tgid,
2474 };
0418dae1
TM		 2475 if (!nfs4_valid_open_stateid(state))
2476 return -EBADF;
2477 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2478 &lockowner) == -EIO)
2479 return -EBADF;
08e9eac4 2480 } else
f597c537 2481 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2482
7c513058 2483 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2484 if (status == 0 && state != NULL)
2485 renew_lease(server, timestamp);
65e4308d 2486 return status;
1da177e4
LT		 2487}
2488
659bfcd6
TM		 2489static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2490 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2491 struct nfs4_state *state, struct nfs4_label *ilabel,
2492 struct nfs4_label *olabel)
1da177e4 2493{
3e4f6290 2494 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2495 struct nfs4_exception exception = {
2496 .state = state,
3114ea7a 2497 .inode = inode,
a1d0b5ee 2498 };
1da177e4
LT		 2499 int err;
2500 do {
1775fd3e 2501 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2502 trace_nfs4_setattr(inode, err);
451146be
TM		 2503 switch (err) {
2504 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2505 if (!(sattr->ia_valid & ATTR_SIZE)) {
2506 pr_warn_once("NFSv4: server %s is incorrectly "
2507 "applying open mode checks to "
2508 "a SETATTR that is not "
2509 "changing file size.\n",
2510 server->nfs_client->cl_hostname);
2511 }
451146be
TM		 2512 if (state && !(state->state & FMODE_WRITE)) {
2513 err = -EBADF;
2514 if (sattr->ia_valid & ATTR_OPEN)
2515 err = -EACCES;
2516 goto out;
2517 }
2518 }
2519 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2520 } while (exception.retry);
451146be 2521out:
1da177e4
LT		 2522 return err;
2523}
2524
2525struct nfs4_closedata {
2526 struct inode *inode;
2527 struct nfs4_state *state;
2528 struct nfs_closeargs arg;
2529 struct nfs_closeres res;
516a6af6 2530 struct nfs_fattr fattr;
26e976a8 2531 unsigned long timestamp;
f7e8917a
FI		 2532 bool roc;
2533 u32 roc_barrier;
1da177e4
LT		 2534};
2535
963d8fe5 2536static void nfs4_free_closedata(void *data)
9512135d 2537{
963d8fe5
TM		 2538 struct nfs4_closedata *calldata = data;
2539 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2540 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2541
f7e8917a
FI		 2542 if (calldata->roc)
2543 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2544 nfs4_put_open_state(calldata->state);
2545 nfs_free_seqid(calldata->arg.seqid);
9512135d 2546 nfs4_put_state_owner(sp);
322b2b90 2547 nfs_sb_deactive(sb);
9512135d
TM		 2548 kfree(calldata);
2549}
2550
963d8fe5 2551static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2552{
963d8fe5 2553 struct nfs4_closedata *calldata = data;
1da177e4 2554 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2555 struct nfs_server *server = NFS_SERVER(calldata->inode);
2556
a3ca5651 2557 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2558 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2559 return;
42113a75 2560 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2561 /* hmm. we are done with the inode, and in the process of freeing
2562 * the state_owner. we keep this around to process errors
2563 */
1da177e4
LT		 2564 switch (task->tk_status) {
2565 case 0:
f7e8917a
FI		 2566 if (calldata->roc)
2567 pnfs_roc_set_barrier(state->inode,
2568 calldata->roc_barrier);
226056c5 2569 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2570 renew_lease(server, calldata->timestamp);
226056c5 2571 goto out_release;
69794ad7 2572 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2573 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2574 case -NFS4ERR_OLD_STATEID:
2575 case -NFS4ERR_BAD_STATEID:
1da177e4 2576 case -NFS4ERR_EXPIRED:
dc0b027d 2577 if (calldata->arg.fmode == 0)
9e33bed5 2578 break;
1da177e4 2579 default:
69794ad7 2580 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2581 rpc_restart_call_prepare(task);
69794ad7
TM		 2582 goto out_release;
2583 }
1da177e4 2584 }
226056c5 2585 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
69794ad7 2586out_release:
72211dbe 2587 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2588 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2589 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2590}
2591
4ce70ada 2592static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2593{
4ce70ada 2594 struct nfs4_closedata *calldata = data;
9512135d 2595 struct nfs4_state *state = calldata->state;
7fdab069 2596 struct inode *inode = calldata->inode;
88069f77 2597 int call_close = 0;
9512135d 2598
a3ca5651 2599 dprintk("%s: begin!\n", __func__);
963d8fe5 2600 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2601 goto out_wait;
003707c7 2602
88069f77
TM		 2603 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2604 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2605 spin_lock(&state->owner->so_lock);
003707c7 2606 /* Calculate the change in open mode */
e7616923 2607 if (state->n_rdwr == 0) {
003707c7 2608 if (state->n_rdonly == 0) {
88069f77
TM		 2609 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2610 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2611 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2612 }
2613 if (state->n_wronly == 0) {
88069f77
TM		 2614 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2615 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2616 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2617 }
e7616923 2618 }
5d422301
TM		 2619 if (!nfs4_valid_open_stateid(state))
2620 call_close = 0;
4cecb76f 2621 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2622
2623 if (!call_close) {
963d8fe5 2624 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2625 goto out_no_action;
9512135d 2626 }
88069f77 2627
f7e8917a 2628 if (calldata->arg.fmode == 0) {
88069f77 2629 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2630 if (calldata->roc &&
b9536ad5
AA		 2631 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2632 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2633 goto out_wait;
b9536ad5 2634 }
f7e8917a 2635 }
88069f77 2636
516a6af6 2637 nfs_fattr_init(calldata->res.fattr);
26e976a8 2638 calldata->timestamp = jiffies;
7fdab069 2639 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2640 &calldata->arg.seq_args,
2641 &calldata->res.seq_res,
2240a9e2
TM		 2642 task) != 0)
2643 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2644 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2645 return;
2646out_no_action:
2647 task->tk_action = NULL;
2648out_wait:
2649 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2650}
2651
963d8fe5 2652static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2653 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2654 .rpc_call_done = nfs4_close_done,
2655 .rpc_release = nfs4_free_closedata,
2656};
2657
fe08c546
PT		 2658static bool nfs4_state_has_opener(struct nfs4_state *state)
2659{
2660 /* first check existing openers */
2661 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2662 state->n_rdonly != 0)
2663 return true;
2664
2665 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2666 state->n_wronly != 0)
2667 return true;
2668
2669 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2670 state->n_rdwr != 0)
2671 return true;
2672
2673 return false;
2674}
2675
2676static bool nfs4_roc(struct inode *inode)
2677{
2678 struct nfs_inode *nfsi = NFS_I(inode);
2679 struct nfs_open_context *ctx;
2680 struct nfs4_state *state;
2681
2682 spin_lock(&inode->i_lock);
2683 list_for_each_entry(ctx, &nfsi->open_files, list) {
2684 state = ctx->state;
2685 if (state == NULL)
2686 continue;
2687 if (nfs4_state_has_opener(state)) {
2688 spin_unlock(&inode->i_lock);
2689 return false;
2690 }
2691 }
2692 spin_unlock(&inode->i_lock);
2693
2694 if (nfs4_check_delegation(inode, FMODE_READ))
2695 return false;
2696
2697 return pnfs_roc(inode);
2698}
2699
1da177e4
LT		 2700/*
2701 * It is possible for data to be read/written from a mem-mapped file
2702 * after the sys_close call (which hits the vfs layer as a flush).
2703 * This means that we can't safely call nfsv4 close on a file until
2704 * the inode is cleared. This in turn means that we are not good
2705 * NFSv4 citizens - we do not indicate to the server to update the file's
2706 * share state even when we are done with one of the three share
2707 * stateid's in the inode.
2708 *
2709 * NOTE: Caller must be holding the sp->so_owner semaphore!
2710 */
1f7977c1 2711int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2712{
4a35bd41 2713 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2714 struct nfs4_closedata *calldata;
b39e625b
TM		 2715 struct nfs4_state_owner *sp = state->owner;
2716 struct rpc_task *task;
5138fde0
TM		 2717 struct rpc_message msg = {
2718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2719 .rpc_cred = state->owner->so_cred,
2720 };
c970aa85
TM		 2721 struct rpc_task_setup task_setup_data = {
2722 .rpc_client = server->client,
5138fde0 2723 .rpc_message = &msg,
c970aa85 2724 .callback_ops = &nfs4_close_ops,
101070ca 2725 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2726 .flags = RPC_TASK_ASYNC,
2727 };
9512135d 2728 int status = -ENOMEM;
1da177e4 2729
fa940720
WAA		 2730 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2731 &task_setup_data.rpc_client, &msg);
2732
8535b2be 2733 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2734 if (calldata == NULL)
9512135d 2735 goto out;
a9c92d6b 2736 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2737 calldata->inode = state->inode;
1da177e4 2738 calldata->state = state;
4a35bd41 2739 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2740 calldata->arg.stateid = &state->open_stateid;
1da177e4 2741 /* Serialization for the sequence id */
8535b2be 2742 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2743 if (calldata->arg.seqid == NULL)
2744 goto out_free_calldata;
dc0b027d 2745 calldata->arg.fmode = 0;
a65318bf 2746 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2747 calldata->res.fattr = &calldata->fattr;
c1d51931 2748 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2749 calldata->res.server = server;
fe08c546 2750 calldata->roc = nfs4_roc(state->inode);
643168c2 2751 nfs_sb_active(calldata->inode->i_sb);
9512135d 2752
1174dd1f
TM		 2753 msg.rpc_argp = &calldata->arg;
2754 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2755 task_setup_data.callback_data = calldata;
2756 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2757 if (IS_ERR(task))
2758 return PTR_ERR(task);
a49c3c77
TM		 2759 status = 0;
2760 if (wait)
2761 status = rpc_wait_for_completion_task(task);
b39e625b 2762 rpc_put_task(task);
a49c3c77 2763 return status;
9512135d
TM		 2764out_free_calldata:
2765 kfree(calldata);
2766out:
b39e625b
TM		 2767 nfs4_put_open_state(state);
2768 nfs4_put_state_owner(sp);
9512135d 2769 return status;
1da177e4
LT		 2770}
2771
2b484297 2772static struct inode *
5bc2afc2
TM		 2773nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2774 int open_flags, struct iattr *attr, int *opened)
1da177e4 2775{
1da177e4 2776 struct nfs4_state *state;
aa9c2669
DQ		 2777 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2778
2779 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2780
565277f6 2781 /* Protect against concurrent sillydeletes */
5bc2afc2 2782 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2783
2784 nfs4_label_release_security(label);
2785
f46e0bd3
TM		 2786 if (IS_ERR(state))
2787 return ERR_CAST(state);
275bb307 2788 return state->inode;
1da177e4
LT		 2789}
2790
1185a552 2791static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2792{
2793 if (ctx->state == NULL)
2794 return;
2795 if (is_sync)
643168c2 2796 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2797 else
643168c2 2798 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2799}
1da177e4 2800
b944dba3
TM		 2801#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2802#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2803#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2804
1da177e4
LT		 2805static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2806{
43652ad5
BH		 2807 struct nfs4_server_caps_arg args = {
2808 .fhandle = fhandle,
2809 };
1da177e4
LT		 2810 struct nfs4_server_caps_res res = {};
2811 struct rpc_message msg = {
2812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2813 .rpc_argp = &args,
1da177e4
LT		 2814 .rpc_resp = &res,
2815 };
2816 int status;
2817
7c513058 2818 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2819 if (status == 0) {
b944dba3
TM		 2820 /* Sanity check the server answers */
2821 switch (server->nfs_client->cl_minorversion) {
2822 case 0:
2823 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2824 res.attr_bitmask[2] = 0;
2825 break;
2826 case 1:
2827 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2828 break;
2829 case 2:
2830 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2831 }
1da177e4 2832 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2833 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2834 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2835 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2836 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2837 NFS_CAP_CTIME|NFS_CAP_MTIME|
2838 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2839 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2840 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2841 server->caps |= NFS_CAP_ACLS;
2842 if (res.has_links != 0)
2843 server->caps |= NFS_CAP_HARDLINKS;
2844 if (res.has_symlinks != 0)
2845 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2846 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2847 server->caps |= NFS_CAP_FILEID;
2848 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2849 server->caps |= NFS_CAP_MODE;
2850 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2851 server->caps |= NFS_CAP_NLINK;
2852 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2853 server->caps |= NFS_CAP_OWNER;
2854 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2855 server->caps |= NFS_CAP_OWNER_GROUP;
2856 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2857 server->caps |= NFS_CAP_ATIME;
2858 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2859 server->caps |= NFS_CAP_CTIME;
2860 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2861 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2862#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2863 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2864 server->caps |= NFS_CAP_SECURITY_LABEL;
2865#endif
2866 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2867 sizeof(server->attr_bitmask));
b944dba3 2868 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2869
a65318bf
TM		 2870 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2871 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2872 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2873 server->cache_consistency_bitmask[2] = 0;
1da177e4 2874 server->acl_bitmask = res.acl_bitmask;
264e6351 2875 server->fh_expire_type = res.fh_expire_type;
1da177e4 2876 }
cccef3b9 2877
1da177e4
LT		 2878 return status;
2879}
2880
55a97593 2881int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2882{
2883 struct nfs4_exception exception = { };
2884 int err;
2885 do {
2886 err = nfs4_handle_exception(server,
2887 _nfs4_server_capabilities(server, fhandle),
2888 &exception);
2889 } while (exception.retry);
2890 return err;
2891}
2892
2893static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2894 struct nfs_fsinfo *info)
2895{
aa9c2669 2896 u32 bitmask[3];
1da177e4 2897 struct nfs4_lookup_root_arg args = {
aa9c2669 2898 .bitmask = bitmask,
1da177e4
LT		 2899 };
2900 struct nfs4_lookup_res res = {
2901 .server = server,
0e574af1 2902 .fattr = info->fattr,
1da177e4
LT		 2903 .fh = fhandle,
2904 };
2905 struct rpc_message msg = {
2906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2907 .rpc_argp = &args,
2908 .rpc_resp = &res,
2909 };
008f55d0 2910
aa9c2669
DQ		 2911 bitmask[0] = nfs4_fattr_bitmap[0];
2912 bitmask[1] = nfs4_fattr_bitmap[1];
2913 /*
2914 * Process the label in the upcoming getfattr
2915 */
2916 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2917
0e574af1 2918 nfs_fattr_init(info->fattr);
7c513058 2919 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2920}
2921
2922static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_fsinfo *info)
2924{
2925 struct nfs4_exception exception = { };
2926 int err;
2927 do {
fb8a5ba8 2928 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2929 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2930 switch (err) {
2931 case 0:
2932 case -NFS4ERR_WRONGSEC:
05e9cfb4 2933 goto out;
fb8a5ba8
BS		 2934 default:
2935 err = nfs4_handle_exception(server, err, &exception);
2936 }
1da177e4 2937 } while (exception.retry);
05e9cfb4 2938out:
1da177e4
LT		 2939 return err;
2940}
2941
8f70e95f
BS		 2942static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2943 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2944{
c2190661
TM		 2945 struct rpc_auth_create_args auth_args = {
2946 .pseudoflavor = flavor,
2947 };
8f70e95f
BS		 2948 struct rpc_auth *auth;
2949 int ret;
2950
c2190661 2951 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2952 if (IS_ERR(auth)) {
75bc8821 2953 ret = -EACCES;
8f70e95f
BS		 2954 goto out;
2955 }
2956 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2957out:
2958 return ret;
2959}
2960
9a744ba3
CL		 2961/*
2962 * Retry pseudoroot lookup with various security flavors. We do this when:
2963 *
2964 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2965 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2966 *
2967 * Returns zero on success, or a negative NFS4ERR value, or a
2968 * negative errno value.
2969 */
801a16dc 2970static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2971 struct nfs_fsinfo *info)
1da177e4 2972{
9a744ba3
CL		 2973 /* Per 3530bis 15.33.5 */
2974 static const rpc_authflavor_t flav_array[] = {
2975 RPC_AUTH_GSS_KRB5P,
2976 RPC_AUTH_GSS_KRB5I,
2977 RPC_AUTH_GSS_KRB5,
c4eafe11 2978 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2979 RPC_AUTH_NULL,
2980 };
2981 int status = -EPERM;
2982 size_t i;
6a1a1e34 2983
4d4b69dd
WAA		 2984 if (server->auth_info.flavor_len > 0) {
2985 /* try each flavor specified by user */
2986 for (i = 0; i < server->auth_info.flavor_len; i++) {
2987 status = nfs4_lookup_root_sec(server, fhandle, info,
2988 server->auth_info.flavors[i]);
2989 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2990 continue;
2991 break;
2992 }
2993 } else {
2994 /* no flavors specified by user, try default list */
2995 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2996 status = nfs4_lookup_root_sec(server, fhandle, info,
2997 flav_array[i]);
2998 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2999 continue;
3000 break;
3001 }
8f70e95f 3002 }
9a744ba3 3003
fb8a5ba8
BS		 3004 /*
3005 * -EACCESS could mean that the user doesn't have correct permissions
3006 * to access the mount. It could also mean that we tried to mount
3007 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3008 * existing mount programs don't handle -EACCES very well so it should
3009 * be mapped to -EPERM instead.
3010 */
3011 if (status == -EACCES)
3012 status = -EPERM;
801a16dc
BS		 3013 return status;
3014}
3015
2ed4b95b
CL		 3016static int nfs4_do_find_root_sec(struct nfs_server *server,
3017 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3018{
3019 int mv = server->nfs_client->cl_minorversion;
3020 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3021}
3022
3023/**
3024 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3025 * @server: initialized nfs_server handle
3026 * @fhandle: we fill in the pseudo-fs root file handle
3027 * @info: we fill in an FSINFO struct
5e6b1990 3028 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3029 *
3030 * Returns zero on success, or a negative errno.
801a16dc 3031 */
3028eb2b 3032int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3033 struct nfs_fsinfo *info,
3034 bool auth_probe)
801a16dc 3035{
2ed4b95b
CL		 3036 int status;
3037
5e6b1990
TM		 3038 switch (auth_probe) {
3039 case false:
3040 status = nfs4_lookup_root(server, fhandle, info);
3041 if (status != -NFS4ERR_WRONGSEC)
3042 break;
5e6b1990 3043 default:
2ed4b95b 3044 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3045 }
2ed4b95b 3046
1da177e4
LT		 3047 if (status == 0)
3048 status = nfs4_server_capabilities(server, fhandle);
3049 if (status == 0)
3050 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3051
c12e87f4 3052 return nfs4_map_errors(status);
1da177e4
LT		 3053}
3054
bae36241
BS		 3055static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3056 struct nfs_fsinfo *info)
3057{
3058 int error;
3059 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3060 struct nfs4_label *label = NULL;
bae36241
BS		 3061
3062 error = nfs4_server_capabilities(server, mntfh);
3063 if (error < 0) {
3064 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3065 return error;
3066 }
3067
14c43f76
DQ		 3068 label = nfs4_label_alloc(server, GFP_KERNEL);
3069 if (IS_ERR(label))
3070 return PTR_ERR(label);
3071
1775fd3e 3072 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3073 if (error < 0) {
3074 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3075 goto err_free_label;
bae36241
BS		 3076 }
3077
3078 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3079 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3080 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3081
14c43f76
DQ		 3082err_free_label:
3083 nfs4_label_free(label);
3084
bae36241
BS		 3085 return error;
3086}
3087
6b97fd3d
MN		 3088/*
3089 * Get locations and (maybe) other attributes of a referral.
3090 * Note that we'll actually follow the referral later when
3091 * we detect fsid mismatch in inode revalidation
3092 */
f05d147f
BS		 3093static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3094 const struct qstr *name, struct nfs_fattr *fattr,
3095 struct nfs_fh *fhandle)
6b97fd3d
MN		 3096{
3097 int status = -ENOMEM;
3098 struct page *page = NULL;
3099 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3100
3101 page = alloc_page(GFP_KERNEL);
3102 if (page == NULL)
3103 goto out;
3104 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3105 if (locations == NULL)
3106 goto out;
3107
f05d147f 3108 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3109 if (status != 0)
3110 goto out;
519ae255
CL		 3111
3112 /*
3113 * If the fsid didn't change, this is a migration event, not a
3114 * referral. Cause us to drop into the exception handler, which
3115 * will kick off migration recovery.
3116 */
6b97fd3d 3117 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3118 dprintk("%s: server did not return a different fsid for"
3119 " a referral at %s\n", __func__, name->name);
519ae255 3120 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3121 goto out;
3122 }
533eb461
AA		 3123 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3124 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3125
533eb461 3126 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3127 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3128 memset(fhandle, 0, sizeof(struct nfs_fh));
3129out:
3130 if (page)
3131 __free_page(page);
5d7ca35a 3132 kfree(locations);
6b97fd3d
MN		 3133 return status;
3134}
3135
1775fd3e
DQ		 3136static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3137 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3138{
3139 struct nfs4_getattr_arg args = {
3140 .fh = fhandle,
3141 .bitmask = server->attr_bitmask,
3142 };
3143 struct nfs4_getattr_res res = {
3144 .fattr = fattr,
1775fd3e 3145 .label = label,
1da177e4
LT		 3146 .server = server,
3147 };
3148 struct rpc_message msg = {
3149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3150 .rpc_argp = &args,
3151 .rpc_resp = &res,
3152 };
aa9c2669
DQ		 3153
3154 args.bitmask = nfs4_bitmask(server, label);
3155
0e574af1 3156 nfs_fattr_init(fattr);
7c513058 3157 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3158}
3159
1775fd3e
DQ		 3160static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3161 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3162{
3163 struct nfs4_exception exception = { };
3164 int err;
3165 do {
b5f875a9
TM		 3166 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3167 trace_nfs4_getattr(server, fhandle, fattr, err);
3168 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3169 &exception);
3170 } while (exception.retry);
3171 return err;
3172}
3173
3174/*
3175 * The file is not closed if it is opened due to the a request to change
3176 * the size of the file. The open call will not be needed once the
3177 * VFS layer lookup-intents are implemented.
3178 *
3179 * Close is called when the inode is destroyed.
3180 * If we haven't opened the file for O_WRONLY, we
3181 * need to in the size_change case to obtain a stateid.
3182 *
3183 * Got race?
3184 * Because OPEN is always done by name in nfsv4, it is
3185 * possible that we opened a different file by the same
3186 * name. We can recognize this race condition, but we
3187 * can't do anything about it besides returning an error.
3188 *
3189 * This will be fixed with VFS changes (lookup-intent).
3190 */
3191static int
3192nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3193 struct iattr *sattr)
3194{
08e9eac4 3195 struct inode *inode = dentry->d_inode;
659bfcd6 3196 struct rpc_cred *cred = NULL;
d530838b 3197 struct nfs4_state *state = NULL;
14c43f76 3198 struct nfs4_label *label = NULL;
1da177e4
LT		 3199 int status;
3200
8a1636c4 3201 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3202 pnfs_commit_and_return_layout(inode);
8a1636c4 3203
0e574af1 3204 nfs_fattr_init(fattr);
1da177e4 3205
2669940d
AA		 3206 /* Deal with open(O_TRUNC) */
3207 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3208 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3209
3210 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3211 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3212 return 0;
3213
d530838b 3214 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3215 if (sattr->ia_valid & ATTR_FILE) {
3216 struct nfs_open_context *ctx;
3217
3218 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3219 if (ctx) {
3220 cred = ctx->cred;
3221 state = ctx->state;
3222 }
659bfcd6 3223 }
08e9eac4 3224
14c43f76
DQ		 3225 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3226 if (IS_ERR(label))
3227 return PTR_ERR(label);
3228
3229 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3230 if (status == 0) {
65e4308d 3231 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3232 nfs_setsecurity(inode, fattr, label);
3233 }
14c43f76 3234 nfs4_label_free(label);
1da177e4
LT		 3235 return status;
3236}
3237
0c2e53f1
TM		 3238static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3239 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3240 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3241{
0c2e53f1 3242 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3243 int status;
3244 struct nfs4_lookup_arg args = {
3245 .bitmask = server->attr_bitmask,
0c2e53f1 3246 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3247 .name = name,
3248 };
3249 struct nfs4_lookup_res res = {
3250 .server = server,
3251 .fattr = fattr,
aa9c2669 3252 .label = label,
2b3de441
DH		 3253 .fh = fhandle,
3254 };
3255 struct rpc_message msg = {
3256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3257 .rpc_argp = &args,
3258 .rpc_resp = &res,
3259 };
3260
aa9c2669
DQ		 3261 args.bitmask = nfs4_bitmask(server, label);
3262
2b3de441
DH		 3263 nfs_fattr_init(fattr);
3264
1da177e4 3265 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3266 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3267 dprintk("NFS reply lookup: %d\n", status);
3268 return status;
3269}
3270
72de53ec 3271static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3272{
7ebb9315 3273 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3274 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3275 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3276 fattr->nlink = 2;
3277}
3278
72de53ec
BS		 3279static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3280 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3281 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3282{
3283 struct nfs4_exception exception = { };
72de53ec 3284 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3285 int err;
3286 do {
1775fd3e 3287 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3288 trace_nfs4_lookup(dir, name, err);
72de53ec 3289 switch (err) {
08ef7bd3 3290 case -NFS4ERR_BADNAME:
72de53ec
BS		 3291 err = -ENOENT;
3292 goto out;
0c2e53f1 3293 case -NFS4ERR_MOVED:
f05d147f 3294 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3295 goto out;
0c2e53f1 3296 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3297 err = -EPERM;
3298 if (client != *clnt)
3299 goto out;
66b06860 3300 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3301 if (IS_ERR(client))
3302 return PTR_ERR(client);
3303
3304 exception.retry = 1;
3305 break;
3306 default:
3307 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3308 }
1da177e4 3309 } while (exception.retry);
72de53ec
BS		 3310
3311out:
3312 if (err == 0)
3313 *clnt = client;
3314 else if (client != *clnt)
3315 rpc_shutdown_client(client);
3316
1da177e4
LT		 3317 return err;
3318}
3319
80a16b21 3320static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3321 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3322 struct nfs4_label *label)
72de53ec
BS		 3323{
3324 int status;
3325 struct rpc_clnt *client = NFS_CLIENT(dir);
3326
1775fd3e 3327 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3328 if (client != NFS_CLIENT(dir)) {
3329 rpc_shutdown_client(client);
3330 nfs_fixup_secinfo_attributes(fattr);
3331 }
3332 return status;
3333}
3334
f05d147f
BS		 3335struct rpc_clnt *
3336nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3337 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3338{
b72888cb 3339 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3340 int status;
f05d147f 3341
1775fd3e 3342 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3343 if (status < 0)
f05d147f 3344 return ERR_PTR(status);
b72888cb 3345 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3346}
3347
1da177e4
LT		 3348static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3349{
76b32999 3350 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3351 struct nfs4_accessargs args = {
3352 .fh = NFS_FH(inode),
a4980e78 3353 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3354 };
3355 struct nfs4_accessres res = {
3356 .server = server,
1da177e4 3357 };
1da177e4
LT		 3358 struct rpc_message msg = {
3359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3360 .rpc_argp = &args,
3361 .rpc_resp = &res,
3362 .rpc_cred = entry->cred,
3363 };
3364 int mode = entry->mask;
aa9c2669 3365 int status = 0;
1da177e4
LT		 3366
3367 /*
3368 * Determine which access bits we want to ask for...
3369 */
3370 if (mode & MAY_READ)
3371 args.access |= NFS4_ACCESS_READ;
3372 if (S_ISDIR(inode->i_mode)) {
3373 if (mode & MAY_WRITE)
3374 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3375 if (mode & MAY_EXEC)
3376 args.access |= NFS4_ACCESS_LOOKUP;
3377 } else {
3378 if (mode & MAY_WRITE)
3379 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3380 if (mode & MAY_EXEC)
3381 args.access |= NFS4_ACCESS_EXECUTE;
3382 }
c407d41a
TM		 3383
3384 res.fattr = nfs_alloc_fattr();
3385 if (res.fattr == NULL)
3386 return -ENOMEM;
3387
7c513058 3388 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3389 if (!status) {
6168f62c 3390 nfs_access_set_mask(entry, res.access);
c407d41a 3391 nfs_refresh_inode(inode, res.fattr);
1da177e4 3392 }
c407d41a 3393 nfs_free_fattr(res.fattr);
1da177e4
LT		 3394 return status;
3395}
3396
3397static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3398{
3399 struct nfs4_exception exception = { };
3400 int err;
3401 do {
c1578b76
TM		 3402 err = _nfs4_proc_access(inode, entry);
3403 trace_nfs4_access(inode, err);
3404 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3405 &exception);
3406 } while (exception.retry);
3407 return err;
3408}
3409
3410/*
3411 * TODO: For the time being, we don't try to get any attributes
3412 * along with any of the zero-copy operations READ, READDIR,
3413 * READLINK, WRITE.
3414 *
3415 * In the case of the first three, we want to put the GETATTR
3416 * after the read-type operation -- this is because it is hard
3417 * to predict the length of a GETATTR response in v4, and thus
3418 * align the READ data correctly. This means that the GETATTR
3419 * may end up partially falling into the page cache, and we should
3420 * shift it into the 'tail' of the xdr_buf before processing.
3421 * To do this efficiently, we need to know the total length
3422 * of data received, which doesn't seem to be available outside
3423 * of the RPC layer.
3424 *
3425 * In the case of WRITE, we also want to put the GETATTR after
3426 * the operation -- in this case because we want to make sure
140150db 3427 * we get the post-operation mtime and size.
1da177e4
LT		 3428 *
3429 * Both of these changes to the XDR layer would in fact be quite
3430 * minor, but I decided to leave them for a subsequent patch.
3431 */
3432static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3433 unsigned int pgbase, unsigned int pglen)
3434{
3435 struct nfs4_readlink args = {
3436 .fh = NFS_FH(inode),
3437 .pgbase = pgbase,
3438 .pglen = pglen,
3439 .pages = &page,
3440 };
f50c7000 3441 struct nfs4_readlink_res res;
1da177e4
LT		 3442 struct rpc_message msg = {
3443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3444 .rpc_argp = &args,
f50c7000 3445 .rpc_resp = &res,
1da177e4
LT		 3446 };
3447
7c513058 3448 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3449}
3450
3451static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3452 unsigned int pgbase, unsigned int pglen)
3453{
3454 struct nfs4_exception exception = { };
3455 int err;
3456 do {
c1578b76
TM		 3457 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3458 trace_nfs4_readlink(inode, err);
3459 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3460 &exception);
3461 } while (exception.retry);
3462 return err;
3463}
3464
1da177e4 3465/*
8867fe58 3466 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3467 */
1da177e4
LT		 3468static int
3469nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3470 int flags)
1da177e4 3471{
aa9c2669 3472 struct nfs4_label l, *ilabel = NULL;
8867fe58 3473 struct nfs_open_context *ctx;
1da177e4 3474 struct nfs4_state *state;
5bc2afc2 3475 int opened = 0;
1da177e4
LT		 3476 int status = 0;
3477
8867fe58
MS		 3478 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3479 if (IS_ERR(ctx))
3480 return PTR_ERR(ctx);
3481
aa9c2669
DQ		 3482 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3483
a8a5da99 3484 sattr->ia_mode &= ~current_umask();
5bc2afc2 3485 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3486 if (IS_ERR(state)) {
3487 status = PTR_ERR(state);
c0204fd2 3488 goto out;
1da177e4 3489 }
1da177e4 3490out:
aa9c2669 3491 nfs4_label_release_security(ilabel);
8867fe58 3492 put_nfs_open_context(ctx);
1da177e4
LT		 3493 return status;
3494}
3495
3496static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3497{
16e42959 3498 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3499 struct nfs_removeargs args = {
1da177e4 3500 .fh = NFS_FH(dir),
26fe5750 3501 .name = *name,
16e42959 3502 };
4fdc17b2 3503 struct nfs_removeres res = {
16e42959 3504 .server = server,
1da177e4 3505 };
1da177e4 3506 struct rpc_message msg = {
4fdc17b2
TM		 3507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3508 .rpc_argp = &args,
3509 .rpc_resp = &res,
1da177e4 3510 };
778d2817 3511 int status;
1da177e4 3512
7c513058 3513 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3514 if (status == 0)
16e42959 3515 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3516 return status;
3517}
3518
3519static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3520{
3521 struct nfs4_exception exception = { };
3522 int err;
3523 do {
078ea3df
TM		 3524 err = _nfs4_proc_remove(dir, name);
3525 trace_nfs4_remove(dir, name, err);
3526 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3527 &exception);
3528 } while (exception.retry);
3529 return err;
3530}
3531
e4eff1a6 3532static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3533{
e4eff1a6
TM		 3534 struct nfs_server *server = NFS_SERVER(dir);
3535 struct nfs_removeargs *args = msg->rpc_argp;
3536 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3537
e4eff1a6 3538 res->server = server;
1da177e4 3539 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3540 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3541
3542 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3543}
3544
34e137cc
BS		 3545static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3546{
d9afbd1b
TM		 3547 nfs4_setup_sequence(NFS_SERVER(data->dir),
3548 &data->args.seq_args,
3549 &data->res.seq_res,
3550 task);
1da177e4
LT		 3551}
3552
e4eff1a6 3553static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3554{
078ea3df
TM		 3555 struct nfs_unlinkdata *data = task->tk_calldata;
3556 struct nfs_removeres *res = &data->res;
e4eff1a6 3557
14516c3a
TM		 3558 if (!nfs4_sequence_done(task, &res->seq_res))
3559 return 0;
9e33bed5 3560 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3561 return 0;
3562 update_changeattr(dir, &res->cinfo);
e4eff1a6 3563 return 1;
1da177e4
LT		 3564}
3565
d3d4152a
JL		 3566static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3567{
3568 struct nfs_server *server = NFS_SERVER(dir);
3569 struct nfs_renameargs *arg = msg->rpc_argp;
3570 struct nfs_renameres *res = msg->rpc_resp;
3571
3572 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3573 res->server = server;
a9c92d6b 3574 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3575}
3576
c6bfa1a1
BS		 3577static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3578{
d9afbd1b
TM		 3579 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3580 &data->args.seq_args,
3581 &data->res.seq_res,
3582 task);
d3d4152a
JL		 3583}
3584
3585static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3586 struct inode *new_dir)
3587{
fbc6f7c2
TM		 3588 struct nfs_renamedata *data = task->tk_calldata;
3589 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3590
3591 if (!nfs4_sequence_done(task, &res->seq_res))
3592 return 0;
3593 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3594 return 0;
3595
3596 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3597 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3598 return 1;
3599}
3600
1da177e4
LT		 3601static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3602{
91ba2eee 3603 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3604 struct nfs4_link_arg arg = {
3605 .fh = NFS_FH(inode),
3606 .dir_fh = NFS_FH(dir),
3607 .name = name,
91ba2eee
TM		 3608 .bitmask = server->attr_bitmask,
3609 };
91ba2eee
TM		 3610 struct nfs4_link_res res = {
3611 .server = server,
1775fd3e 3612 .label = NULL,
1da177e4 3613 };
1da177e4
LT		 3614 struct rpc_message msg = {
3615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3616 .rpc_argp = &arg,
91ba2eee 3617 .rpc_resp = &res,
1da177e4 3618 };
136f2627
TM		 3619 int status = -ENOMEM;
3620
3621 res.fattr = nfs_alloc_fattr();
778d2817 3622 if (res.fattr == NULL)
136f2627 3623 goto out;
1da177e4 3624
14c43f76
DQ		 3625 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3626 if (IS_ERR(res.label)) {
3627 status = PTR_ERR(res.label);
3628 goto out;
3629 }
aa9c2669 3630 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3631
7c513058 3632 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3633 if (!status) {
3634 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3635 status = nfs_post_op_update_inode(inode, res.fattr);
3636 if (!status)
3637 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3638 }
14c43f76
DQ		 3639
3640
3641 nfs4_label_free(res.label);
3642
136f2627 3643out:
136f2627 3644 nfs_free_fattr(res.fattr);
1da177e4
LT		 3645 return status;
3646}
3647
3648static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3649{
3650 struct nfs4_exception exception = { };
3651 int err;
3652 do {
3653 err = nfs4_handle_exception(NFS_SERVER(inode),
3654 _nfs4_proc_link(inode, dir, name),
3655 &exception);
3656 } while (exception.retry);
3657 return err;
3658}
3659
57dc9a57
TM		 3660struct nfs4_createdata {
3661 struct rpc_message msg;
3662 struct nfs4_create_arg arg;
3663 struct nfs4_create_res res;
3664 struct nfs_fh fh;
3665 struct nfs_fattr fattr;
1775fd3e 3666 struct nfs4_label *label;
57dc9a57
TM		 3667};
3668
3669static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3670 struct qstr *name, struct iattr *sattr, u32 ftype)
3671{
3672 struct nfs4_createdata *data;
3673
3674 data = kzalloc(sizeof(*data), GFP_KERNEL);
3675 if (data != NULL) {
3676 struct nfs_server *server = NFS_SERVER(dir);
3677
14c43f76
DQ		 3678 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3679 if (IS_ERR(data->label))
3680 goto out_free;
3681
57dc9a57
TM		 3682 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3683 data->msg.rpc_argp = &data->arg;
3684 data->msg.rpc_resp = &data->res;
3685 data->arg.dir_fh = NFS_FH(dir);
3686 data->arg.server = server;
3687 data->arg.name = name;
3688 data->arg.attrs = sattr;
3689 data->arg.ftype = ftype;
aa9c2669 3690 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3691 data->res.server = server;
3692 data->res.fh = &data->fh;
3693 data->res.fattr = &data->fattr;
1775fd3e 3694 data->res.label = data->label;
57dc9a57 3695 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3696 }
3697 return data;
14c43f76
DQ		 3698out_free:
3699 kfree(data);
3700 return NULL;
57dc9a57
TM		 3701}
3702
3703static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3704{
7c513058 3705 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3706 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3707 if (status == 0) {
3708 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3709 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3710 }
3711 return status;
3712}
3713
3714static void nfs4_free_createdata(struct nfs4_createdata *data)
3715{
14c43f76 3716 nfs4_label_free(data->label);
57dc9a57
TM		 3717 kfree(data);
3718}
3719
4f390c15 3720static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3721 struct page *page, unsigned int len, struct iattr *sattr,
3722 struct nfs4_label *label)
1da177e4 3723{
57dc9a57
TM		 3724 struct nfs4_createdata *data;
3725 int status = -ENAMETOOLONG;
1da177e4 3726
94a6d753 3727 if (len > NFS4_MAXPATHLEN)
57dc9a57 3728 goto out;
4f390c15 3729
57dc9a57
TM		 3730 status = -ENOMEM;
3731 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3732 if (data == NULL)
3733 goto out;
3734
3735 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3736 data->arg.u.symlink.pages = &page;
3737 data->arg.u.symlink.len = len;
1775fd3e 3738 data->arg.label = label;
1da177e4 3739
57dc9a57
TM		 3740 status = nfs4_do_create(dir, dentry, data);
3741
3742 nfs4_free_createdata(data);
3743out:
1da177e4
LT		 3744 return status;
3745}
3746
4f390c15 3747static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3748 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3749{
3750 struct nfs4_exception exception = { };
aa9c2669 3751 struct nfs4_label l, *label = NULL;
1da177e4 3752 int err;
aa9c2669
DQ		 3753
3754 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3755
1da177e4 3756 do {
078ea3df
TM		 3757 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3758 trace_nfs4_symlink(dir, &dentry->d_name, err);
3759 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3760 &exception);
3761 } while (exception.retry);
aa9c2669
DQ		 3762
3763 nfs4_label_release_security(label);
1da177e4
LT		 3764 return err;
3765}
3766
3767static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3768 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3769{
57dc9a57
TM		 3770 struct nfs4_createdata *data;
3771 int status = -ENOMEM;
1da177e4 3772
57dc9a57
TM		 3773 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3774 if (data == NULL)
3775 goto out;
3776
1775fd3e 3777 data->arg.label = label;
57dc9a57
TM		 3778 status = nfs4_do_create(dir, dentry, data);
3779
3780 nfs4_free_createdata(data);
3781out:
1da177e4
LT		 3782 return status;
3783}
3784
3785static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3786 struct iattr *sattr)
3787{
3788 struct nfs4_exception exception = { };
aa9c2669 3789 struct nfs4_label l, *label = NULL;
1da177e4 3790 int err;
a8a5da99 3791
aa9c2669
DQ		 3792 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3793
a8a5da99 3794 sattr->ia_mode &= ~current_umask();
1da177e4 3795 do {
078ea3df
TM		 3796 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3797 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3798 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3799 &exception);
3800 } while (exception.retry);
aa9c2669
DQ		 3801 nfs4_label_release_security(label);
3802
1da177e4
LT		 3803 return err;
3804}
3805
3806static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3807 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3808{
3809 struct inode *dir = dentry->d_inode;
3810 struct nfs4_readdir_arg args = {
3811 .fh = NFS_FH(dir),
56e4ebf8 3812 .pages = pages,
1da177e4
LT		 3813 .pgbase = 0,
3814 .count = count,
96d25e53 3815 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3816 .plus = plus,
1da177e4
LT		 3817 };
3818 struct nfs4_readdir_res res;
3819 struct rpc_message msg = {
3820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3821 .rpc_argp = &args,
3822 .rpc_resp = &res,
3823 .rpc_cred = cred,
3824 };
3825 int status;
3826
6de1472f
AV		 3827 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3828 dentry,
eadf4598 3829 (unsigned long long)cookie);
c3f52af3 3830 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3831 res.pgbase = args.pgbase;
7c513058 3832 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3833 if (status >= 0) {
c3f52af3 3834 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3835 status += args.pgbase;
3836 }
c4812998
TM		 3837
3838 nfs_invalidate_atime(dir);
3839
3110ff80 3840 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3841 return status;
3842}
3843
3844static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3845 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3846{
3847 struct nfs4_exception exception = { };
3848 int err;
3849 do {
c1578b76
TM		 3850 err = _nfs4_proc_readdir(dentry, cred, cookie,
3851 pages, count, plus);
3852 trace_nfs4_readdir(dentry->d_inode, err);
3853 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3854 &exception);
3855 } while (exception.retry);
3856 return err;
3857}
3858
3859static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3860 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3861{
57dc9a57
TM		 3862 struct nfs4_createdata *data;
3863 int mode = sattr->ia_mode;
3864 int status = -ENOMEM;
1da177e4 3865
57dc9a57
TM		 3866 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3867 if (data == NULL)
3868 goto out;
3869
1da177e4 3870 if (S_ISFIFO(mode))
57dc9a57 3871 data->arg.ftype = NF4FIFO;
1da177e4 3872 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3873 data->arg.ftype = NF4BLK;
3874 data->arg.u.device.specdata1 = MAJOR(rdev);
3875 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3876 }
3877 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3878 data->arg.ftype = NF4CHR;
3879 data->arg.u.device.specdata1 = MAJOR(rdev);
3880 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3881 } else if (!S_ISSOCK(mode)) {
3882 status = -EINVAL;
3883 goto out_free;
1da177e4 3884 }
1775fd3e 3885
aa9c2669 3886 data->arg.label = label;
57dc9a57 3887 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3888out_free:
57dc9a57
TM		 3889 nfs4_free_createdata(data);
3890out:
1da177e4
LT		 3891 return status;
3892}
3893
3894static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3895 struct iattr *sattr, dev_t rdev)
3896{
3897 struct nfs4_exception exception = { };
aa9c2669 3898 struct nfs4_label l, *label = NULL;
1da177e4 3899 int err;
a8a5da99 3900
aa9c2669
DQ		 3901 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3902
a8a5da99 3903 sattr->ia_mode &= ~current_umask();
1da177e4 3904 do {
078ea3df
TM		 3905 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3906 trace_nfs4_mknod(dir, &dentry->d_name, err);
3907 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3908 &exception);
3909 } while (exception.retry);
aa9c2669
DQ		 3910
3911 nfs4_label_release_security(label);
3912
1da177e4
LT		 3913 return err;
3914}
3915
3916static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3917 struct nfs_fsstat *fsstat)
3918{
3919 struct nfs4_statfs_arg args = {
3920 .fh = fhandle,
3921 .bitmask = server->attr_bitmask,
3922 };
24ad148a
BH		 3923 struct nfs4_statfs_res res = {
3924 .fsstat = fsstat,
3925 };
1da177e4
LT		 3926 struct rpc_message msg = {
3927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3928 .rpc_argp = &args,
24ad148a 3929 .rpc_resp = &res,
1da177e4
LT		 3930 };
3931
0e574af1 3932 nfs_fattr_init(fsstat->fattr);
7c513058 3933 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3934}
3935
3936static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3937{
3938 struct nfs4_exception exception = { };
3939 int err;
3940 do {
3941 err = nfs4_handle_exception(server,
3942 _nfs4_proc_statfs(server, fhandle, fsstat),
3943 &exception);
3944 } while (exception.retry);
3945 return err;
3946}
3947
3948static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3949 struct nfs_fsinfo *fsinfo)
3950{
3951 struct nfs4_fsinfo_arg args = {
3952 .fh = fhandle,
3953 .bitmask = server->attr_bitmask,
3954 };
3dda5e43
BH		 3955 struct nfs4_fsinfo_res res = {
3956 .fsinfo = fsinfo,
3957 };
1da177e4
LT		 3958 struct rpc_message msg = {
3959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3960 .rpc_argp = &args,
3dda5e43 3961 .rpc_resp = &res,
1da177e4
LT		 3962 };
3963
7c513058 3964 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3965}
3966
3967static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3968{
3969 struct nfs4_exception exception = { };
83ca7f5a 3970 unsigned long now = jiffies;
1da177e4
LT		 3971 int err;
3972
3973 do {
83ca7f5a 3974 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3975 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3976 if (err == 0) {
3977 struct nfs_client *clp = server->nfs_client;
3978
3979 spin_lock(&clp->cl_lock);
3980 clp->cl_lease_time = fsinfo->lease_time * HZ;
3981 clp->cl_last_renewal = now;
3982 spin_unlock(&clp->cl_lock);
3983 break;
3984 }
3985 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3986 } while (exception.retry);
3987 return err;
3988}
3989
3990static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3991{
e38eb650
BS		 3992 int error;
3993
0e574af1 3994 nfs_fattr_init(fsinfo->fattr);
e38eb650 3995 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3996 if (error == 0) {
3997 /* block layout checks this! */
3998 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3999 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4000 }
e38eb650
BS		 4001
4002 return error;
1da177e4
LT		 4003}
4004
4005static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4006 struct nfs_pathconf *pathconf)
4007{
4008 struct nfs4_pathconf_arg args = {
4009 .fh = fhandle,
4010 .bitmask = server->attr_bitmask,
4011 };
d45b2989
BH		 4012 struct nfs4_pathconf_res res = {
4013 .pathconf = pathconf,
4014 };
1da177e4
LT		 4015 struct rpc_message msg = {
4016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4017 .rpc_argp = &args,
d45b2989 4018 .rpc_resp = &res,
1da177e4
LT		 4019 };
4020
4021 /* None of the pathconf attributes are mandatory to implement */
4022 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4023 memset(pathconf, 0, sizeof(*pathconf));
4024 return 0;
4025 }
4026
0e574af1 4027 nfs_fattr_init(pathconf->fattr);
7c513058 4028 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4029}
4030
4031static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4032 struct nfs_pathconf *pathconf)
4033{
4034 struct nfs4_exception exception = { };
4035 int err;
4036
4037 do {
4038 err = nfs4_handle_exception(server,
4039 _nfs4_proc_pathconf(server, fhandle, pathconf),
4040 &exception);
4041 } while (exception.retry);
4042 return err;
4043}
4044
5521abfd 4045int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4046 const struct nfs_open_context *ctx,
4047 const struct nfs_lock_context *l_ctx,
4048 fmode_t fmode)
4049{
4050 const struct nfs_lockowner *lockowner = NULL;
4051
4052 if (l_ctx != NULL)
4053 lockowner = &l_ctx->lockowner;
5521abfd 4054 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4055}
4056EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4057
5521abfd
TM		 4058static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4059 const struct nfs_open_context *ctx,
4060 const struct nfs_lock_context *l_ctx,
4061 fmode_t fmode)
4062{
4063 nfs4_stateid current_stateid;
4064
e1253be0
TM		 4065 /* If the current stateid represents a lost lock, then exit */
4066 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4067 return true;
5521abfd
TM		 4068 return nfs4_stateid_match(stateid, &current_stateid);
4069}
4070
4071static bool nfs4_error_stateid_expired(int err)
4072{
4073 switch (err) {
4074 case -NFS4ERR_DELEG_REVOKED:
4075 case -NFS4ERR_ADMIN_REVOKED:
4076 case -NFS4ERR_BAD_STATEID:
4077 case -NFS4ERR_STALE_STATEID:
4078 case -NFS4ERR_OLD_STATEID:
4079 case -NFS4ERR_OPENMODE:
4080 case -NFS4ERR_EXPIRED:
4081 return true;
4082 }
4083 return false;
4084}
4085
d45f60c6 4086void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4087{
d45f60c6 4088 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4089}
4090
d45f60c6 4091static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4092{
d45f60c6 4093 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4094
d45f60c6
WAA		 4095 trace_nfs4_read(hdr, task->tk_status);
4096 if (nfs4_async_handle_error(task, server,
4097 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4098 rpc_restart_call_prepare(task);
ec06c096 4099 return -EAGAIN;
1da177e4 4100 }
8850df99 4101
d45f60c6 4102 __nfs4_read_done_cb(hdr);
1da177e4 4103 if (task->tk_status > 0)
d45f60c6 4104 renew_lease(server, hdr->timestamp);
ec06c096 4105 return 0;
1da177e4
LT		 4106}
4107
5521abfd 4108static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4109 struct nfs_pgio_args *args)
5521abfd
TM		 4110{
4111
4112 if (!nfs4_error_stateid_expired(task->tk_status) ||
4113 nfs4_stateid_is_current(&args->stateid,
4114 args->context,
4115 args->lock_context,
4116 FMODE_READ))
4117 return false;
4118 rpc_restart_call_prepare(task);
4119 return true;
4120}
4121
d45f60c6 4122static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4123{
4124
4125 dprintk("--> %s\n", __func__);
4126
d45f60c6 4127 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4128 return -EAGAIN;
d45f60c6 4129 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4130 return -EAGAIN;
d45f60c6
WAA		 4131 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4132 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4133}
4134
d45f60c6
WAA		 4135static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4136 struct rpc_message *msg)
1da177e4 4137{
d45f60c6
WAA		 4138 hdr->timestamp = jiffies;
4139 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4140 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4141 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4142}
4143
d45f60c6
WAA		 4144static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4145 struct nfs_pgio_header *hdr)
ea7c3303 4146{
d45f60c6
WAA		 4147 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4148 &hdr->args.seq_args,
4149 &hdr->res.seq_res,
9b206149 4150 task))
ef1820f9 4151 return 0;
d45f60c6
WAA		 4152 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4153 hdr->args.lock_context,
4154 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4155 return -EIO;
d45f60c6 4156 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4157 return -EIO;
4158 return 0;
1da177e4
LT		 4159}
4160
d45f60c6
WAA		 4161static int nfs4_write_done_cb(struct rpc_task *task,
4162 struct nfs_pgio_header *hdr)
1da177e4 4163{
d45f60c6 4164 struct inode *inode = hdr->inode;
1da177e4 4165
d45f60c6
WAA		 4166 trace_nfs4_write(hdr, task->tk_status);
4167 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4168 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4169 rpc_restart_call_prepare(task);
788e7a89 4170 return -EAGAIN;
1da177e4 4171 }
4f9838c7 4172 if (task->tk_status >= 0) {
d45f60c6
WAA		 4173 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4174 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4175 }
788e7a89 4176 return 0;
1da177e4
LT		 4177}
4178
5521abfd 4179static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4180 struct nfs_pgio_args *args)
5521abfd
TM		 4181{
4182
4183 if (!nfs4_error_stateid_expired(task->tk_status) ||
4184 nfs4_stateid_is_current(&args->stateid,
4185 args->context,
4186 args->lock_context,
4187 FMODE_WRITE))
4188 return false;
4189 rpc_restart_call_prepare(task);
4190 return true;
4191}
4192
d45f60c6 4193static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4194{
d45f60c6 4195 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4196 return -EAGAIN;
d45f60c6 4197 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4198 return -EAGAIN;
d45f60c6
WAA		 4199 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4200 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4201}
4202
5a37f851 4203static
d45f60c6 4204bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4205{
5a37f851 4206 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4207 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4208 return false;
4209 /* Otherwise, request attributes if and only if we don't hold
4210 * a delegation
4211 */
011e2a7f 4212 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4213}
a69aef14 4214
d45f60c6
WAA		 4215static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4216 struct rpc_message *msg)
1da177e4 4217{
d45f60c6 4218 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4219
d45f60c6
WAA		 4220 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4221 hdr->args.bitmask = NULL;
4222 hdr->res.fattr = NULL;
7ffd1064 4223 } else
d45f60c6 4224 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4225
d45f60c6
WAA		 4226 if (!hdr->pgio_done_cb)
4227 hdr->pgio_done_cb = nfs4_write_done_cb;
4228 hdr->res.server = server;
4229 hdr->timestamp = jiffies;
1da177e4 4230
bdc7f021 4231 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4232 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4233}
4234
0b7c0153 4235static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4236{
d9afbd1b
TM		 4237 nfs4_setup_sequence(NFS_SERVER(data->inode),
4238 &data->args.seq_args,
4239 &data->res.seq_res,
4240 task);
1da177e4
LT		 4241}
4242
0b7c0153 4243static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4244{
1da177e4 4245 struct inode *inode = data->inode;
14516c3a 4246
cc668ab3 4247 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4248 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4249 rpc_restart_call_prepare(task);
788e7a89 4250 return -EAGAIN;
1da177e4 4251 }
788e7a89 4252 return 0;
1da177e4
LT		 4253}
4254
0b7c0153 4255static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4256{
4257 if (!nfs4_sequence_done(task, &data->res.seq_res))
4258 return -EAGAIN;
0b7c0153 4259 return data->commit_done_cb(task, data);
5f452431
FI		 4260}
4261
0b7c0153 4262static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4263{
788e7a89 4264 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4265
0b7c0153
FI		 4266 if (data->commit_done_cb == NULL)
4267 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4268 data->res.server = server;
bdc7f021 4269 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4270 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4271}
4272
9bc4e3ca
CL		 4273struct nfs4_renewdata {
4274 struct nfs_client *client;
4275 unsigned long timestamp;
4276};
4277
1da177e4
LT		 4278/*
4279 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4280 * standalone procedure for queueing an asynchronous RENEW.
4281 */
9bc4e3ca 4282static void nfs4_renew_release(void *calldata)
dc96aef9 4283{
9bc4e3ca
CL		 4284 struct nfs4_renewdata *data = calldata;
4285 struct nfs_client *clp = data->client;
dc96aef9 4286
0851de06
AB		 4287 if (atomic_read(&clp->cl_count) > 1)
4288 nfs4_schedule_state_renewal(clp);
4289 nfs_put_client(clp);
9bc4e3ca 4290 kfree(data);
dc96aef9
AB		 4291}
4292
9bc4e3ca 4293static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4294{
9bc4e3ca
CL		 4295 struct nfs4_renewdata *data = calldata;
4296 struct nfs_client *clp = data->client;
4297 unsigned long timestamp = data->timestamp;
1da177e4 4298
c6d01c6f 4299 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4300 switch (task->tk_status) {
4301 case 0:
4302 break;
4303 case -NFS4ERR_LEASE_MOVED:
4304 nfs4_schedule_lease_moved_recovery(clp);
4305 break;
4306 default:
95baa25c 4307 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4308 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4309 return;
4310 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4311 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4312 return;
4313 }
4314 nfs4_schedule_path_down_recovery(clp);
1da177e4 4315 }
452e9352 4316 do_renew_lease(clp, timestamp);
1da177e4
LT		 4317}
4318
963d8fe5
TM		 4319static const struct rpc_call_ops nfs4_renew_ops = {
4320 .rpc_call_done = nfs4_renew_done,
dc96aef9 4321 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4322};
4323
2f60ea6b 4324static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4325{
4326 struct rpc_message msg = {
4327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4328 .rpc_argp = clp,
b4454fe1 4329 .rpc_cred = cred,
1da177e4 4330 };
9bc4e3ca 4331 struct nfs4_renewdata *data;
1da177e4 4332
2f60ea6b
TM		 4333 if (renew_flags == 0)
4334 return 0;
0851de06
AB		 4335 if (!atomic_inc_not_zero(&clp->cl_count))
4336 return -EIO;
b569ad34 4337 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4338 if (data == NULL)
4339 return -ENOMEM;
4340 data->client = clp;
4341 data->timestamp = jiffies;
bc7a05ca 4342 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4343 &nfs4_renew_ops, data);
1da177e4
LT		 4344}
4345
8534d4ec 4346static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4347{
4348 struct rpc_message msg = {
4349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4350 .rpc_argp = clp,
b4454fe1 4351 .rpc_cred = cred,
1da177e4
LT		 4352 };
4353 unsigned long now = jiffies;
4354 int status;
4355
bc7a05ca 4356 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4357 if (status < 0)
4358 return status;
452e9352 4359 do_renew_lease(clp, now);
1da177e4
LT		 4360 return 0;
4361}
4362
aa1870af
BF		 4363static inline int nfs4_server_supports_acls(struct nfs_server *server)
4364{
7dd7d959 4365 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4366}
4367
21f498c2
TM		 4368/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4369 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4370 * the stack.
4371 */
21f498c2 4372#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4373
e9e3d724
NH		 4374static int buf_to_pages_noslab(const void *buf, size_t buflen,
4375 struct page **pages, unsigned int *pgbase)
4376{
4377 struct page *newpage, **spages;
4378 int rc = 0;
4379 size_t len;
4380 spages = pages;
4381
4382 do {
21f498c2 4383 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4384 newpage = alloc_page(GFP_KERNEL);
4385
4386 if (newpage == NULL)
4387 goto unwind;
4388 memcpy(page_address(newpage), buf, len);
4389 buf += len;
4390 buflen -= len;
4391 *pages++ = newpage;
4392 rc++;
4393 } while (buflen != 0);
4394
4395 return rc;
4396
4397unwind:
4398 for(; rc > 0; rc--)
4399 __free_page(spages[rc-1]);
4400 return -ENOMEM;
4401}
4402
e50a1c2e
BF		 4403struct nfs4_cached_acl {
4404 int cached;
4405 size_t len;
3e9d4154 4406 char data[0];
e50a1c2e
BF		 4407};
4408
4409static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4410{
4411 struct nfs_inode *nfsi = NFS_I(inode);
4412
4413 spin_lock(&inode->i_lock);
4414 kfree(nfsi->nfs4_acl);
4415 nfsi->nfs4_acl = acl;
4416 spin_unlock(&inode->i_lock);
4417}
4418
4419static void nfs4_zap_acl_attr(struct inode *inode)
4420{
4421 nfs4_set_cached_acl(inode, NULL);
4422}
4423
4424static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4425{
4426 struct nfs_inode *nfsi = NFS_I(inode);
4427 struct nfs4_cached_acl *acl;
4428 int ret = -ENOENT;
4429
4430 spin_lock(&inode->i_lock);
4431 acl = nfsi->nfs4_acl;
4432 if (acl == NULL)
4433 goto out;
4434 if (buf == NULL) /* user is just asking for length */
4435 goto out_len;
4436 if (acl->cached == 0)
4437 goto out;
4438 ret = -ERANGE; /* see getxattr(2) man page */
4439 if (acl->len > buflen)
4440 goto out;
4441 memcpy(buf, acl->data, acl->len);
4442out_len:
4443 ret = acl->len;
4444out:
4445 spin_unlock(&inode->i_lock);
4446 return ret;
4447}
4448
5794d21e 4449static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4450{
4451 struct nfs4_cached_acl *acl;
b291f1b1 4452 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4453
1f1ea6c2 4454 if (buflen <= PAGE_SIZE) {
b291f1b1 4455 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4456 if (acl == NULL)
4457 goto out;
4458 acl->cached = 1;
5794d21e 4459 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4460 } else {
4461 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4462 if (acl == NULL)
4463 goto out;
4464 acl->cached = 0;
4465 }
4466 acl->len = acl_len;
4467out:
4468 nfs4_set_cached_acl(inode, acl);
4469}
4470
bf118a34
AA		 4471/*
4472 * The getxattr API returns the required buffer length when called with a
4473 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4474 * the required buf. On a NULL buf, we send a page of data to the server
4475 * guessing that the ACL request can be serviced by a page. If so, we cache
4476 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4477 * the cache. If not so, we throw away the page, and cache the required
4478 * length. The next getxattr call will then produce another round trip to
4479 * the server, this time with the input buf of the required size.
4480 */
16b4289c 4481static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4482{
bf118a34 4483 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4484 struct nfs_getaclargs args = {
4485 .fh = NFS_FH(inode),
4486 .acl_pages = pages,
4487 .acl_len = buflen,
4488 };
663c79b3
BH		 4489 struct nfs_getaclres res = {
4490 .acl_len = buflen,
4491 };
aa1870af
BF		 4492 struct rpc_message msg = {
4493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4494 .rpc_argp = &args,
663c79b3 4495 .rpc_resp = &res,
aa1870af 4496 };
21f498c2
TM		 4497 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4498 int ret = -ENOMEM, i;
aa1870af 4499
bf118a34
AA		 4500 /* As long as we're doing a round trip to the server anyway,
4501 * let's be prepared for a page of acl data. */
4502 if (npages == 0)
4503 npages = 1;
21f498c2
TM		 4504 if (npages > ARRAY_SIZE(pages))
4505 return -ERANGE;
5a006899 4506
bf118a34
AA		 4507 for (i = 0; i < npages; i++) {
4508 pages[i] = alloc_page(GFP_KERNEL);
4509 if (!pages[i])
4510 goto out_free;
e50a1c2e 4511 }
5a006899
SP		 4512
4513 /* for decoding across pages */
4514 res.acl_scratch = alloc_page(GFP_KERNEL);
4515 if (!res.acl_scratch)
4516 goto out_free;
4517
bf118a34
AA		 4518 args.acl_len = npages * PAGE_SIZE;
4519 args.acl_pgbase = 0;
5a006899 4520
de040bec 4521 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4522 __func__, buf, buflen, npages, args.acl_len);
4523 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4524 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4525 if (ret)
4526 goto out_free;
bf118a34 4527
1f1ea6c2
TM		 4528 /* Handle the case where the passed-in buffer is too short */
4529 if (res.acl_flags & NFS4_ACL_TRUNC) {
4530 /* Did the user only issue a request for the acl length? */
4531 if (buf == NULL)
4532 goto out_ok;
e50a1c2e 4533 ret = -ERANGE;
1f1ea6c2 4534 goto out_free;
e50a1c2e 4535 }
1f1ea6c2 4536 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4537 if (buf) {
4538 if (res.acl_len > buflen) {
4539 ret = -ERANGE;
4540 goto out_free;
4541 }
1f1ea6c2 4542 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4543 }
1f1ea6c2
TM		 4544out_ok:
4545 ret = res.acl_len;
e50a1c2e 4546out_free:
bf118a34
AA		 4547 for (i = 0; i < npages; i++)
4548 if (pages[i])
4549 __free_page(pages[i]);
331818f1
TM		 4550 if (res.acl_scratch)
4551 __free_page(res.acl_scratch);
aa1870af
BF		 4552 return ret;
4553}
4554
16b4289c
TM		 4555static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4556{
4557 struct nfs4_exception exception = { };
4558 ssize_t ret;
4559 do {
4560 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4561 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4562 if (ret >= 0)
4563 break;
4564 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4565 } while (exception.retry);
4566 return ret;
4567}
4568
e50a1c2e
BF		 4569static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4570{
4571 struct nfs_server *server = NFS_SERVER(inode);
4572 int ret;
4573
4574 if (!nfs4_server_supports_acls(server))
4575 return -EOPNOTSUPP;
4576 ret = nfs_revalidate_inode(server, inode);
4577 if (ret < 0)
4578 return ret;
08a22b39
AK		 4579 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4580 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4581 ret = nfs4_read_cached_acl(inode, buf, buflen);
4582 if (ret != -ENOENT)
bf118a34
AA		 4583 /* -ENOENT is returned if there is no ACL or if there is an ACL
4584 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4585 return ret;
4586 return nfs4_get_acl_uncached(inode, buf, buflen);
4587}
4588
16b4289c 4589static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4590{
4591 struct nfs_server *server = NFS_SERVER(inode);
4592 struct page *pages[NFS4ACL_MAXPAGES];
4593 struct nfs_setaclargs arg = {
4594 .fh = NFS_FH(inode),
4595 .acl_pages = pages,
4596 .acl_len = buflen,
4597 };
73c403a9 4598 struct nfs_setaclres res;
4b580ee3
BF		 4599 struct rpc_message msg = {
4600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4601 .rpc_argp = &arg,
73c403a9 4602 .rpc_resp = &res,
4b580ee3 4603 };
21f498c2 4604 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4605 int ret, i;
4b580ee3
BF		 4606
4607 if (!nfs4_server_supports_acls(server))
4608 return -EOPNOTSUPP;
21f498c2
TM		 4609 if (npages > ARRAY_SIZE(pages))
4610 return -ERANGE;
e9e3d724
NH		 4611 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4612 if (i < 0)
4613 return i;
57ec14c5 4614 nfs4_inode_return_delegation(inode);
7c513058 4615 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4616
4617 /*
4618 * Free each page after tx, so the only ref left is
4619 * held by the network stack
4620 */
4621 for (; i > 0; i--)
4622 put_page(pages[i-1]);
4623
08a22b39
AK		 4624 /*
4625 * Acl update can result in inode attribute update.
4626 * so mark the attribute cache invalid.
4627 */
4628 spin_lock(&inode->i_lock);
4629 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4630 spin_unlock(&inode->i_lock);
f41f7418
TM		 4631 nfs_access_zap_cache(inode);
4632 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4633 return ret;
4634}
4635
16b4289c
TM		 4636static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4637{
4638 struct nfs4_exception exception = { };
4639 int err;
4640 do {
c1578b76
TM		 4641 err = __nfs4_proc_set_acl(inode, buf, buflen);
4642 trace_nfs4_set_acl(inode, err);
4643 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4644 &exception);
4645 } while (exception.retry);
4646 return err;
4647}
4648
aa9c2669
DQ		 4649#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4650static int _nfs4_get_security_label(struct inode *inode, void *buf,
4651 size_t buflen)
4652{
4653 struct nfs_server *server = NFS_SERVER(inode);
4654 struct nfs_fattr fattr;
4655 struct nfs4_label label = {0, 0, buflen, buf};
4656
4657 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4658 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4659 .fh = NFS_FH(inode),
4660 .bitmask = bitmask,
4661 };
4662 struct nfs4_getattr_res res = {
4663 .fattr = &fattr,
4664 .label = &label,
4665 .server = server,
4666 };
4667 struct rpc_message msg = {
4668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4669 .rpc_argp = &arg,
aa9c2669
DQ		 4670 .rpc_resp = &res,
4671 };
4672 int ret;
4673
4674 nfs_fattr_init(&fattr);
4675
fcb63a9b 4676 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4677 if (ret)
4678 return ret;
4679 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4680 return -ENOENT;
4681 if (buflen < label.len)
4682 return -ERANGE;
4683 return 0;
4684}
4685
4686static int nfs4_get_security_label(struct inode *inode, void *buf,
4687 size_t buflen)
4688{
4689 struct nfs4_exception exception = { };
4690 int err;
4691
4692 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4693 return -EOPNOTSUPP;
4694
4695 do {
c1578b76
TM		 4696 err = _nfs4_get_security_label(inode, buf, buflen);
4697 trace_nfs4_get_security_label(inode, err);
4698 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4699 &exception);
4700 } while (exception.retry);
4701 return err;
4702}
4703
4704static int _nfs4_do_set_security_label(struct inode *inode,
4705 struct nfs4_label *ilabel,
4706 struct nfs_fattr *fattr,
4707 struct nfs4_label *olabel)
4708{
4709
4710 struct iattr sattr = {0};
4711 struct nfs_server *server = NFS_SERVER(inode);
4712 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4713 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4714 .fh = NFS_FH(inode),
4715 .iap = &sattr,
4716 .server = server,
4717 .bitmask = bitmask,
4718 .label = ilabel,
4719 };
4720 struct nfs_setattrres res = {
4721 .fattr = fattr,
4722 .label = olabel,
4723 .server = server,
4724 };
4725 struct rpc_message msg = {
4726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4727 .rpc_argp = &arg,
aa9c2669
DQ		 4728 .rpc_resp = &res,
4729 };
4730 int status;
4731
12207f69 4732 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4733
12207f69 4734 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4735 if (status)
4736 dprintk("%s failed: %d\n", __func__, status);
4737
4738 return status;
4739}
4740
4741static int nfs4_do_set_security_label(struct inode *inode,
4742 struct nfs4_label *ilabel,
4743 struct nfs_fattr *fattr,
4744 struct nfs4_label *olabel)
4745{
4746 struct nfs4_exception exception = { };
4747 int err;
4748
4749 do {
c1578b76
TM		 4750 err = _nfs4_do_set_security_label(inode, ilabel,
4751 fattr, olabel);
4752 trace_nfs4_set_security_label(inode, err);
4753 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4754 &exception);
4755 } while (exception.retry);
4756 return err;
4757}
4758
4759static int
4760nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4761{
4762 struct nfs4_label ilabel, *olabel = NULL;
4763 struct nfs_fattr fattr;
4764 struct rpc_cred *cred;
4765 struct inode *inode = dentry->d_inode;
4766 int status;
4767
4768 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4769 return -EOPNOTSUPP;
4770
4771 nfs_fattr_init(&fattr);
4772
4773 ilabel.pi = 0;
4774 ilabel.lfs = 0;
4775 ilabel.label = (char *)buf;
4776 ilabel.len = buflen;
4777
4778 cred = rpc_lookup_cred();
4779 if (IS_ERR(cred))
4780 return PTR_ERR(cred);
4781
4782 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4783 if (IS_ERR(olabel)) {
4784 status = -PTR_ERR(olabel);
4785 goto out;
4786 }
4787
4788 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4789 if (status == 0)
4790 nfs_setsecurity(inode, &fattr, olabel);
4791
4792 nfs4_label_free(olabel);
4793out:
4794 put_rpccred(cred);
4795 return status;
4796}
4797#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4798
4799
1da177e4 4800static int
aa5190d0 4801nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4802{
aa5190d0
TM		 4803 struct nfs_client *clp = server->nfs_client;
4804
4805 if (task->tk_status >= 0)
1da177e4
LT		 4806 return 0;
4807 switch(task->tk_status) {
a1d0b5ee 4808 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4809 case -NFS4ERR_ADMIN_REVOKED:
4810 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4811 if (state == NULL)
4812 break;
4813 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4814 case -NFS4ERR_OPENMODE:
4815 if (state == NULL)
4816 break;
5d422301 4817 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4818 goto recovery_failed;
0400a6b0 4819 goto wait_on_recovery;
0ced63d1 4820 case -NFS4ERR_EXPIRED:
5d422301
TM		 4821 if (state != NULL) {
4822 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4823 goto recovery_failed;
5d422301 4824 }
1da177e4 4825 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4826 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4827 nfs4_schedule_lease_recovery(clp);
4828 goto wait_on_recovery;
519ae255
CL		 4829 case -NFS4ERR_MOVED:
4830 if (nfs4_schedule_migration_recovery(server) < 0)
4831 goto recovery_failed;
4832 goto wait_on_recovery;
8ef2f8d4
CL		 4833 case -NFS4ERR_LEASE_MOVED:
4834 nfs4_schedule_lease_moved_recovery(clp);
4835 goto wait_on_recovery;
4745e315
AA		 4836#if defined(CONFIG_NFS_V4_1)
4837 case -NFS4ERR_BADSESSION:
4838 case -NFS4ERR_BADSLOT:
4839 case -NFS4ERR_BAD_HIGH_SLOT:
4840 case -NFS4ERR_DEADSESSION:
4841 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4842 case -NFS4ERR_SEQ_FALSE_RETRY:
4843 case -NFS4ERR_SEQ_MISORDERED:
4844 dprintk("%s ERROR %d, Reset session\n", __func__,
4845 task->tk_status);
9f594791 4846 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4847 goto wait_on_recovery;
4745e315 4848#endif /* CONFIG_NFS_V4_1 */
1da177e4 4849 case -NFS4ERR_DELAY:
aa5190d0 4850 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4851 case -NFS4ERR_GRACE:
1da177e4 4852 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4853 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4854 case -NFS4ERR_OLD_STATEID:
f1478c13 4855 goto restart_call;
1da177e4
LT		 4856 }
4857 task->tk_status = nfs4_map_errors(task->tk_status);
4858 return 0;
9f51a78e 4859recovery_failed:
5d422301
TM		 4860 task->tk_status = -EIO;
4861 return 0;
0400a6b0 4862wait_on_recovery:
a2c0b9e2 4863 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4864 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4865 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4866 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4867 goto recovery_failed;
f1478c13 4868restart_call:
a2c0b9e2
TM		 4869 task->tk_status = 0;
4870 return -EAGAIN;
1da177e4
LT		 4871}
4872
f092075d
CL		 4873static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4874 nfs4_verifier *bootverf)
cd93710e
CL		 4875{
4876 __be32 verf[2];
4877
2c820d9a
CL		 4878 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4879 /* An impossible timestamp guarantees this value
4880 * will never match a generated boot time. */
4881 verf[0] = 0;
17f26b12 4882 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4883 } else {
f092075d 4884 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4885 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4886 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4887 }
cd93710e
CL		 4888 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4889}
4890
e984a55a
CL		 4891static unsigned int
4892nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4893 char *buf, size_t len)
4894{
4895 unsigned int result;
4896
4897 rcu_read_lock();
4898 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4899 clp->cl_ipaddr,
4900 rpc_peeraddr2str(clp->cl_rpcclient,
4901 RPC_DISPLAY_ADDR),
4902 rpc_peeraddr2str(clp->cl_rpcclient,
4903 RPC_DISPLAY_PROTO));
4904 rcu_read_unlock();
4905 return result;
4906}
4907
4908static unsigned int
4909nfs4_init_uniform_client_string(const struct nfs_client *clp,
4910 char *buf, size_t len)
4911{
55b59293 4912 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4913
4914 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4915 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4916 clp->rpc_ops->version,
4917 clp->cl_minorversion,
4918 nfs4_client_id_uniquifier,
4919 nodename);
e984a55a
CL		 4920 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4921 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4922 nodename);
e984a55a
CL		 4923}
4924
706cb8db
CL		 4925/*
4926 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4927 * services. Advertise one based on the address family of the
4928 * clientaddr.
4929 */
4930static unsigned int
4931nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4932{
4933 if (strchr(clp->cl_ipaddr, ':') != NULL)
4934 return scnprintf(buf, len, "tcp6");
4935 else
4936 return scnprintf(buf, len, "tcp");
4937}
4938
6bbb4ae8
CL		 4939/**
4940 * nfs4_proc_setclientid - Negotiate client ID
4941 * @clp: state data structure
4942 * @program: RPC program for NFSv4 callback service
4943 * @port: IP port number for NFS4 callback service
4944 * @cred: RPC credential to use for this call
4945 * @res: where to place the result
4946 *
4947 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4948 */
bb8b27e5
TM		 4949int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4950 unsigned short port, struct rpc_cred *cred,
4951 struct nfs4_setclientid_res *res)
1da177e4
LT		 4952{
4953 nfs4_verifier sc_verifier;
4954 struct nfs4_setclientid setclientid = {
4955 .sc_verifier = &sc_verifier,
4956 .sc_prog = program,
f4eecd5d 4957 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4958 };
4959 struct rpc_message msg = {
4960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4961 .rpc_argp = &setclientid,
bb8b27e5 4962 .rpc_resp = res,
286d7d6a 4963 .rpc_cred = cred,
1da177e4 4964 };
6bbb4ae8 4965 int status;
1da177e4 4966
de734831 4967 /* nfs_client_id4 */
f092075d 4968 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4969 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4970 setclientid.sc_name_len =
4971 nfs4_init_uniform_client_string(clp,
4972 setclientid.sc_name,
4973 sizeof(setclientid.sc_name));
4974 else
4975 setclientid.sc_name_len =
4976 nfs4_init_nonuniform_client_string(clp,
4977 setclientid.sc_name,
4978 sizeof(setclientid.sc_name));
de734831 4979 /* cb_client4 */
706cb8db
CL		 4980 setclientid.sc_netid_len =
4981 nfs4_init_callback_netid(clp,
4982 setclientid.sc_netid,
4983 sizeof(setclientid.sc_netid));
de734831 4984 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4985 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4986 clp->cl_ipaddr, port >> 8, port & 255);
4987
6bbb4ae8
CL		 4988 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4989 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4990 setclientid.sc_name_len, setclientid.sc_name);
4991 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4992 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4993 dprintk("NFS reply setclientid: %d\n", status);
4994 return status;
1da177e4
LT		 4995}
4996
6bbb4ae8
CL		 4997/**
4998 * nfs4_proc_setclientid_confirm - Confirm client ID
4999 * @clp: state data structure
5000 * @res: result of a previous SETCLIENTID
5001 * @cred: RPC credential to use for this call
5002 *
5003 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5004 */
fd954ae1 5005int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5006 struct nfs4_setclientid_res *arg,
5007 struct rpc_cred *cred)
1da177e4 5008{
1da177e4
LT		 5009 struct rpc_message msg = {
5010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5011 .rpc_argp = arg,
286d7d6a 5012 .rpc_cred = cred,
1da177e4 5013 };
1da177e4
LT		 5014 int status;
5015
6bbb4ae8
CL		 5016 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5017 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5018 clp->cl_clientid);
1bd714f2 5019 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5020 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5021 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5022 return status;
5023}
5024
fe650407
TM		 5025struct nfs4_delegreturndata {
5026 struct nfs4_delegreturnargs args;
fa178f29 5027 struct nfs4_delegreturnres res;
fe650407
TM		 5028 struct nfs_fh fh;
5029 nfs4_stateid stateid;
26e976a8 5030 unsigned long timestamp;
fa178f29 5031 struct nfs_fattr fattr;
fe650407 5032 int rpc_status;
039b756a
PT		 5033 struct inode *inode;
5034 bool roc;
5035 u32 roc_barrier;
fe650407
TM		 5036};
5037
fe650407
TM		 5038static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5039{
5040 struct nfs4_delegreturndata *data = calldata;
938e1010 5041
14516c3a
TM		 5042 if (!nfs4_sequence_done(task, &data->res.seq_res))
5043 return;
938e1010 5044
ca8acf8d 5045 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5046 switch (task->tk_status) {
79708861 5047 case 0:
fa178f29 5048 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5049 case -NFS4ERR_ADMIN_REVOKED:
5050 case -NFS4ERR_DELEG_REVOKED:
5051 case -NFS4ERR_BAD_STATEID:
5052 case -NFS4ERR_OLD_STATEID:
5053 case -NFS4ERR_STALE_STATEID:
5054 case -NFS4ERR_EXPIRED:
5055 task->tk_status = 0;
039b756a
PT		 5056 if (data->roc)
5057 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5058 break;
79708861
RL		 5059 default:
5060 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5061 -EAGAIN) {
d00c5d43 5062 rpc_restart_call_prepare(task);
79708861
RL		 5063 return;
5064 }
5065 }
5066 data->rpc_status = task->tk_status;
fe650407
TM		 5067}
5068
5069static void nfs4_delegreturn_release(void *calldata)
5070{
039b756a
PT		 5071 struct nfs4_delegreturndata *data = calldata;
5072
5073 if (data->roc)
5074 pnfs_roc_release(data->inode);
fe650407
TM		 5075 kfree(calldata);
5076}
5077
938e1010
AA		 5078static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5079{
5080 struct nfs4_delegreturndata *d_data;
5081
5082 d_data = (struct nfs4_delegreturndata *)data;
5083
039b756a
PT		 5084 if (d_data->roc &&
5085 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5086 return;
5087
d9afbd1b
TM		 5088 nfs4_setup_sequence(d_data->res.server,
5089 &d_data->args.seq_args,
5090 &d_data->res.seq_res,
5091 task);
938e1010 5092}
938e1010 5093
c8d149f3 5094static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5095 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5096 .rpc_call_done = nfs4_delegreturn_done,
5097 .rpc_release = nfs4_delegreturn_release,
5098};
5099
e6f81075 5100static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5101{
5102 struct nfs4_delegreturndata *data;
fa178f29 5103 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5104 struct rpc_task *task;
5138fde0
TM		 5105 struct rpc_message msg = {
5106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5107 .rpc_cred = cred,
5108 };
c970aa85
TM		 5109 struct rpc_task_setup task_setup_data = {
5110 .rpc_client = server->client,
5138fde0 5111 .rpc_message = &msg,
c970aa85
TM		 5112 .callback_ops = &nfs4_delegreturn_ops,
5113 .flags = RPC_TASK_ASYNC,
5114 };
e6f81075 5115 int status = 0;
fe650407 5116
8535b2be 5117 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5118 if (data == NULL)
5119 return -ENOMEM;
a9c92d6b 5120 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5121 data->args.fhandle = &data->fh;
5122 data->args.stateid = &data->stateid;
9e907fec 5123 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5124 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5125 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5126 data->res.fattr = &data->fattr;
5127 data->res.server = server;
5138fde0 5128 nfs_fattr_init(data->res.fattr);
26e976a8 5129 data->timestamp = jiffies;
fe650407 5130 data->rpc_status = 0;
039b756a
PT		 5131 data->inode = inode;
5132 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5133 pnfs_roc(inode) : false;
fe650407 5134
c970aa85 5135 task_setup_data.callback_data = data;
1174dd1f
TM		 5136 msg.rpc_argp = &data->args;
5137 msg.rpc_resp = &data->res;
c970aa85 5138 task = rpc_run_task(&task_setup_data);
7a1218a2 5139 if (IS_ERR(task))
fe650407 5140 return PTR_ERR(task);
e6f81075
TM		 5141 if (!issync)
5142 goto out;
fe650407 5143 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5144 if (status != 0)
5145 goto out;
5146 status = data->rpc_status;
e144cbcc
TM		 5147 if (status == 0)
5148 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5149 else
5150 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5151out:
e6b3c4db 5152 rpc_put_task(task);
fe650407 5153 return status;
1da177e4
LT		 5154}
5155
e6f81075 5156int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5157{
5158 struct nfs_server *server = NFS_SERVER(inode);
5159 struct nfs4_exception exception = { };
5160 int err;
5161 do {
e6f81075 5162 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5163 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5164 switch (err) {
5165 case -NFS4ERR_STALE_STATEID:
5166 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5167 case 0:
5168 return 0;
5169 }
5170 err = nfs4_handle_exception(server, err, &exception);
5171 } while (exception.retry);
5172 return err;
5173}
5174
5175#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5176#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5177
5178/*
5179 * sleep, with exponential backoff, and retry the LOCK operation.
5180 */
5181static unsigned long
5182nfs4_set_lock_task_retry(unsigned long timeout)
5183{
416ad3c9 5184 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5185 timeout <<= 1;
5186 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5187 return NFS4_LOCK_MAXTIMEOUT;
5188 return timeout;
5189}
5190
1da177e4
LT		 5191static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5192{
5193 struct inode *inode = state->inode;
5194 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5195 struct nfs_client *clp = server->nfs_client;
911d1aaf 5196 struct nfs_lockt_args arg = {
1da177e4 5197 .fh = NFS_FH(inode),
911d1aaf 5198 .fl = request,
1da177e4 5199 };
911d1aaf
TM		 5200 struct nfs_lockt_res res = {
5201 .denied = request,
1da177e4
LT		 5202 };
5203 struct rpc_message msg = {
5204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5205 .rpc_argp = &arg,
5206 .rpc_resp = &res,
5207 .rpc_cred = state->owner->so_cred,
5208 };
1da177e4
LT		 5209 struct nfs4_lock_state *lsp;
5210 int status;
5211
911d1aaf 5212 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5213 status = nfs4_set_lock_state(state, request);
5214 if (status != 0)
5215 goto out;
5216 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5217 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5218 arg.lock_owner.s_dev = server->s_dev;
7c513058 5219 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5220 switch (status) {
5221 case 0:
5222 request->fl_type = F_UNLCK;
5223 break;
5224 case -NFS4ERR_DENIED:
5225 status = 0;
1da177e4 5226 }
70cc6487 5227 request->fl_ops->fl_release_private(request);
a6f951dd 5228 request->fl_ops = NULL;
8d0a8a9d 5229out:
1da177e4
LT		 5230 return status;
5231}
5232
5233static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5234{
5235 struct nfs4_exception exception = { };
5236 int err;
5237
5238 do {
d1b748a5
TM		 5239 err = _nfs4_proc_getlk(state, cmd, request);
5240 trace_nfs4_get_lock(request, state, cmd, err);
5241 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5242 &exception);
5243 } while (exception.retry);
5244 return err;
5245}
5246
5247static int do_vfs_lock(struct file *file, struct file_lock *fl)
5248{
5249 int res = 0;
5250 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5251 case FL_POSIX:
5252 res = posix_lock_file_wait(file, fl);
5253 break;
5254 case FL_FLOCK:
5255 res = flock_lock_file_wait(file, fl);
5256 break;
5257 default:
5258 BUG();
5259 }
1da177e4
LT		 5260 return res;
5261}
5262
faf5f49c 5263struct nfs4_unlockdata {
911d1aaf
TM		 5264 struct nfs_locku_args arg;
5265 struct nfs_locku_res res;
faf5f49c
TM		 5266 struct nfs4_lock_state *lsp;
5267 struct nfs_open_context *ctx;
911d1aaf
TM		 5268 struct file_lock fl;
5269 const struct nfs_server *server;
26e976a8 5270 unsigned long timestamp;
faf5f49c
TM		 5271};
5272
911d1aaf
TM		 5273static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5274 struct nfs_open_context *ctx,
5275 struct nfs4_lock_state *lsp,
5276 struct nfs_seqid *seqid)
5277{
5278 struct nfs4_unlockdata *p;
5279 struct inode *inode = lsp->ls_state->inode;
5280
8535b2be 5281 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5282 if (p == NULL)
5283 return NULL;
5284 p->arg.fh = NFS_FH(inode);
5285 p->arg.fl = &p->fl;
5286 p->arg.seqid = seqid;
c1d51931 5287 p->res.seqid = seqid;
911d1aaf
TM		 5288 p->arg.stateid = &lsp->ls_stateid;
5289 p->lsp = lsp;
5290 atomic_inc(&lsp->ls_count);
5291 /* Ensure we don't close file until we're done freeing locks! */
5292 p->ctx = get_nfs_open_context(ctx);
5293 memcpy(&p->fl, fl, sizeof(p->fl));
5294 p->server = NFS_SERVER(inode);
5295 return p;
5296}
5297
06f814a3 5298static void nfs4_locku_release_calldata(void *data)
faf5f49c 5299{
963d8fe5 5300 struct nfs4_unlockdata *calldata = data;
911d1aaf 5301 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5302 nfs4_put_lock_state(calldata->lsp);
5303 put_nfs_open_context(calldata->ctx);
5304 kfree(calldata);
faf5f49c
TM		 5305}
5306
963d8fe5 5307static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5308{
963d8fe5 5309 struct nfs4_unlockdata *calldata = data;
faf5f49c 5310
14516c3a
TM		 5311 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5312 return;
faf5f49c
TM		 5313 switch (task->tk_status) {
5314 case 0:
f597c537
TM		 5315 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5316 &calldata->res.stateid);
26e976a8 5317 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5318 break;
9e33bed5
TM		 5319 case -NFS4ERR_BAD_STATEID:
5320 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5321 case -NFS4ERR_STALE_STATEID:
5322 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5323 break;
5324 default:
9e33bed5 5325 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5326 rpc_restart_call_prepare(task);
faf5f49c 5327 }
2b1bc308 5328 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5329}
5330
4ce70ada 5331static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5332{
4ce70ada 5333 struct nfs4_unlockdata *calldata = data;
faf5f49c 5334
911d1aaf 5335 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5336 goto out_wait;
795a88c9 5337 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5338 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5339 goto out_no_action;
faf5f49c 5340 }
26e976a8 5341 calldata->timestamp = jiffies;
035168ab 5342 if (nfs4_setup_sequence(calldata->server,
a893693c 5343 &calldata->arg.seq_args,
2240a9e2
TM		 5344 &calldata->res.seq_res,
5345 task) != 0)
5346 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5347 return;
5348out_no_action:
5349 task->tk_action = NULL;
5350out_wait:
5351 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5352}
5353
963d8fe5 5354static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5355 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5356 .rpc_call_done = nfs4_locku_done,
06f814a3 5357 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5358};
5359
a5d16a4d
TM		 5360static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5361 struct nfs_open_context *ctx,
5362 struct nfs4_lock_state *lsp,
5363 struct nfs_seqid *seqid)
5364{
5365 struct nfs4_unlockdata *data;
5138fde0
TM		 5366 struct rpc_message msg = {
5367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5368 .rpc_cred = ctx->cred,
5369 };
c970aa85
TM		 5370 struct rpc_task_setup task_setup_data = {
5371 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5372 .rpc_message = &msg,
c970aa85 5373 .callback_ops = &nfs4_locku_ops,
101070ca 5374 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5375 .flags = RPC_TASK_ASYNC,
5376 };
a5d16a4d 5377
fa940720
WAA		 5378 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5379 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5380
137d6aca
FF		 5381 /* Ensure this is an unlock - when canceling a lock, the
5382 * canceled lock is passed in, and it won't be an unlock.
5383 */
5384 fl->fl_type = F_UNLCK;
5385
a5d16a4d
TM		 5386 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5387 if (data == NULL) {
5388 nfs_free_seqid(seqid);
5389 return ERR_PTR(-ENOMEM);
5390 }
5391
a9c92d6b 5392 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5393 msg.rpc_argp = &data->arg;
5394 msg.rpc_resp = &data->res;
c970aa85
TM		 5395 task_setup_data.callback_data = data;
5396 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5397}
5398
faf5f49c
TM		 5399static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5400{
65b62a29
TM		 5401 struct inode *inode = state->inode;
5402 struct nfs4_state_owner *sp = state->owner;
5403 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5404 struct nfs_seqid *seqid;
1da177e4 5405 struct nfs4_lock_state *lsp;
06f814a3
TM		 5406 struct rpc_task *task;
5407 int status = 0;
536ff0f8 5408 unsigned char fl_flags = request->fl_flags;
faf5f49c 5409
8d0a8a9d 5410 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5411 /* Unlock _before_ we do the RPC call */
5412 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5413 /* Exclude nfs_delegation_claim_locks() */
5414 mutex_lock(&sp->so_delegreturn_mutex);
5415 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5416 down_read(&nfsi->rwsem);
5417 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5418 up_read(&nfsi->rwsem);
65b62a29 5419 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5420 goto out;
19e03c57
TM		 5421 }
5422 up_read(&nfsi->rwsem);
65b62a29 5423 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5424 if (status != 0)
9b073574
TM		 5425 goto out;
5426 /* Is this a delegated lock? */
8d0a8a9d 5427 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5428 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5429 goto out;
8535b2be 5430 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5431 status = -ENOMEM;
911d1aaf 5432 if (seqid == NULL)
9b073574 5433 goto out;
cd3758e3 5434 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5435 status = PTR_ERR(task);
5436 if (IS_ERR(task))
9b073574 5437 goto out;
a5d16a4d 5438 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5439 rpc_put_task(task);
9b073574 5440out:
536ff0f8 5441 request->fl_flags = fl_flags;
d1b748a5 5442 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5443 return status;
5444}
5445
a5d16a4d
TM		 5446struct nfs4_lockdata {
5447 struct nfs_lock_args arg;
5448 struct nfs_lock_res res;
5449 struct nfs4_lock_state *lsp;
5450 struct nfs_open_context *ctx;
5451 struct file_lock fl;
26e976a8 5452 unsigned long timestamp;
a5d16a4d
TM		 5453 int rpc_status;
5454 int cancelled;
66179efe 5455 struct nfs_server *server;
a5d16a4d
TM		 5456};
5457
5458static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5459 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5460 gfp_t gfp_mask)
1da177e4 5461{
a5d16a4d
TM		 5462 struct nfs4_lockdata *p;
5463 struct inode *inode = lsp->ls_state->inode;
1da177e4 5464 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5465
8535b2be 5466 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5467 if (p == NULL)
5468 return NULL;
5469
5470 p->arg.fh = NFS_FH(inode);
5471 p->arg.fl = &p->fl;
8535b2be 5472 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5473 if (p->arg.open_seqid == NULL)
5474 goto out_free;
8535b2be 5475 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5476 if (p->arg.lock_seqid == NULL)
2f74c0a0 5477 goto out_free_seqid;
a5d16a4d 5478 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5479 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5480 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5481 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5482 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5483 p->lsp = lsp;
66179efe 5484 p->server = server;
a5d16a4d
TM		 5485 atomic_inc(&lsp->ls_count);
5486 p->ctx = get_nfs_open_context(ctx);
5487 memcpy(&p->fl, fl, sizeof(p->fl));
5488 return p;
2f74c0a0
TM		 5489out_free_seqid:
5490 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5491out_free:
5492 kfree(p);
5493 return NULL;
5494}
5495
5496static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5497{
5498 struct nfs4_lockdata *data = calldata;
5499 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5500
3110ff80 5501 dprintk("%s: begin!\n", __func__);
2f74c0a0 5502 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5503 goto out_wait;
a5d16a4d
TM		 5504 /* Do we need to do an open_to_lock_owner? */
5505 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5506 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5507 goto out_release_lock_seqid;
8fe72bac 5508 }
8e472f33 5509 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5510 data->arg.new_lock_owner = 1;
c1d51931 5511 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5512 } else
5513 data->arg.new_lock_owner = 0;
5d422301
TM		 5514 if (!nfs4_valid_open_stateid(state)) {
5515 data->rpc_status = -EBADF;
5516 task->tk_action = NULL;
5517 goto out_release_open_seqid;
5518 }
26e976a8 5519 data->timestamp = jiffies;
035168ab
TM		 5520 if (nfs4_setup_sequence(data->server,
5521 &data->arg.seq_args,
2240a9e2 5522 &data->res.seq_res,
d9afbd1b 5523 task) == 0)
66179efe 5524 return;
5d422301 5525out_release_open_seqid:
2240a9e2
TM		 5526 nfs_release_seqid(data->arg.open_seqid);
5527out_release_lock_seqid:
5528 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5529out_wait:
5530 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5531 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5532}
5533
a5d16a4d
TM		 5534static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5535{
5536 struct nfs4_lockdata *data = calldata;
5537
3110ff80 5538 dprintk("%s: begin!\n", __func__);
a5d16a4d 5539
14516c3a
TM		 5540 if (!nfs4_sequence_done(task, &data->res.seq_res))
5541 return;
66179efe 5542
a5d16a4d 5543 data->rpc_status = task->tk_status;
a5d16a4d 5544 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5545 if (data->rpc_status == 0)
5546 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5547 else
5548 goto out;
5549 }
5550 if (data->rpc_status == 0) {
f597c537 5551 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5552 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5553 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5554 }
a5d16a4d 5555out:
3110ff80 5556 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5557}
5558
5559static void nfs4_lock_release(void *calldata)
5560{
5561 struct nfs4_lockdata *data = calldata;
5562
3110ff80 5563 dprintk("%s: begin!\n", __func__);
2f74c0a0 5564 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5565 if (data->cancelled != 0) {
5566 struct rpc_task *task;
5567 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5568 data->arg.lock_seqid);
5569 if (!IS_ERR(task))
bf294b41 5570 rpc_put_task_async(task);
3110ff80 5571 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5572 } else
5573 nfs_free_seqid(data->arg.lock_seqid);
5574 nfs4_put_lock_state(data->lsp);
5575 put_nfs_open_context(data->ctx);
5576 kfree(data);
3110ff80 5577 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5578}
5579
5580static const struct rpc_call_ops nfs4_lock_ops = {
5581 .rpc_call_prepare = nfs4_lock_prepare,
5582 .rpc_call_done = nfs4_lock_done,
5583 .rpc_release = nfs4_lock_release,
5584};
5585
2bee72a6
TM		 5586static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5587{
2bee72a6
TM		 5588 switch (error) {
5589 case -NFS4ERR_ADMIN_REVOKED:
5590 case -NFS4ERR_BAD_STATEID:
ecac799a 5591 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5592 if (new_lock_owner != 0 ||
795a88c9 5593 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5594 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5595 break;
5596 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5597 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5598 case -NFS4ERR_EXPIRED:
5599 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5600 };
5601}
5602
afe6c27c 5603static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5604{
5605 struct nfs4_lockdata *data;
5606 struct rpc_task *task;
5138fde0
TM		 5607 struct rpc_message msg = {
5608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5609 .rpc_cred = state->owner->so_cred,
5610 };
c970aa85
TM		 5611 struct rpc_task_setup task_setup_data = {
5612 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5613 .rpc_message = &msg,
c970aa85 5614 .callback_ops = &nfs4_lock_ops,
101070ca 5615 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5616 .flags = RPC_TASK_ASYNC,
5617 };
a5d16a4d
TM		 5618 int ret;
5619
3110ff80 5620 dprintk("%s: begin!\n", __func__);
cd3758e3 5621 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5622 fl->fl_u.nfs4_fl.owner,
5623 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5624 if (data == NULL)
5625 return -ENOMEM;
5626 if (IS_SETLKW(cmd))
5627 data->arg.block = 1;
a9c92d6b 5628 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5629 msg.rpc_argp = &data->arg;
5630 msg.rpc_resp = &data->res;
c970aa85 5631 task_setup_data.callback_data = data;
8fe72bac
TM		 5632 if (recovery_type > NFS_LOCK_NEW) {
5633 if (recovery_type == NFS_LOCK_RECLAIM)
5634 data->arg.reclaim = NFS_LOCK_RECLAIM;
5635 nfs4_set_sequence_privileged(&data->arg.seq_args);
5636 }
c970aa85 5637 task = rpc_run_task(&task_setup_data);
7a1218a2 5638 if (IS_ERR(task))
a5d16a4d 5639 return PTR_ERR(task);
a5d16a4d
TM		 5640 ret = nfs4_wait_for_completion_rpc_task(task);
5641 if (ret == 0) {
5642 ret = data->rpc_status;
2bee72a6
TM		 5643 if (ret)
5644 nfs4_handle_setlk_error(data->server, data->lsp,
5645 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5646 } else
5647 data->cancelled = 1;
e6b3c4db 5648 rpc_put_task(task);
3110ff80 5649 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5650 return ret;
1da177e4
LT		 5651}
5652
5653static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5654{
202b50dc 5655 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5656 struct nfs4_exception exception = {
5657 .inode = state->inode,
5658 };
202b50dc
TM		 5659 int err;
5660
5661 do {
42a2d13e
TM		 5662 /* Cache the lock if possible... */
5663 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5664 return 0;
afe6c27c 5665 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5666 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5667 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5668 break;
5669 nfs4_handle_exception(server, err, &exception);
5670 } while (exception.retry);
5671 return err;
1da177e4
LT		 5672}
5673
5674static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5675{
202b50dc 5676 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5677 struct nfs4_exception exception = {
5678 .inode = state->inode,
5679 };
202b50dc
TM		 5680 int err;
5681
6bfc93ef
TM		 5682 err = nfs4_set_lock_state(state, request);
5683 if (err != 0)
5684 return err;
f6de7a39 5685 if (!recover_lost_locks) {
ef1820f9
N		 5686 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5687 return 0;
5688 }
202b50dc 5689 do {
42a2d13e
TM		 5690 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5691 return 0;
afe6c27c 5692 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5693 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5694 switch (err) {
5695 default:
5696 goto out;
5697 case -NFS4ERR_GRACE:
5698 case -NFS4ERR_DELAY:
5699 nfs4_handle_exception(server, err, &exception);
5700 err = 0;
5701 }
202b50dc 5702 } while (exception.retry);
a9ed2e25 5703out:
202b50dc 5704 return err;
1da177e4
LT		 5705}
5706
f062eb6c 5707#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5708/**
5709 * nfs41_check_expired_locks - possibly free a lock stateid
5710 *
5711 * @state: NFSv4 state for an inode
5712 *
5713 * Returns NFS_OK if recovery for this stateid is now finished.
5714 * Otherwise a negative NFS4ERR value is returned.
5715 */
b01dd1d8 5716static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5717{
eb64cf96 5718 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5719 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5720 struct nfs_server *server = NFS_SERVER(state->inode);
5721
b01dd1d8 5722 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5723 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5724 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5725
5726 status = nfs41_test_stateid(server,
5727 &lsp->ls_stateid,
5728 cred);
08cb47fa 5729 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5730 if (status != NFS_OK) {
3e60ffdd
CL		 5731 /* Free the stateid unless the server
5732 * informs us the stateid is unrecognized. */
89af2739
CL		 5733 if (status != -NFS4ERR_BAD_STATEID)
5734 nfs41_free_stateid(server,
ab7cb0df
TM		 5735 &lsp->ls_stateid,
5736 cred);
795a88c9 5737 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5738 ret = status;
5739 }
5740 }
5741 };
5742
5743 return ret;
5744}
5745
5746static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5747{
5748 int status = NFS_OK;
5749
5750 if (test_bit(LK_STATE_IN_USE, &state->flags))
5751 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5752 if (status != NFS_OK)
5753 status = nfs4_lock_expired(state, request);
5754 return status;
f062eb6c
BS		 5755}
5756#endif
5757
1da177e4
LT		 5758static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5759{
9a99af49 5760 struct nfs4_state_owner *sp = state->owner;
19e03c57 5761 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5762 unsigned char fl_flags = request->fl_flags;
9a99af49 5763 unsigned int seq;
8e469ebd 5764 int status = -ENOLCK;
1da177e4 5765
8e469ebd
TM		 5766 if ((fl_flags & FL_POSIX) &&
5767 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5768 goto out;
6bfc93ef 5769 /* Is this a delegated open? */
6bfc93ef
TM		 5770 status = nfs4_set_lock_state(state, request);
5771 if (status != 0)
5772 goto out;
01c3b861
TM		 5773 request->fl_flags |= FL_ACCESS;
5774 status = do_vfs_lock(request->fl_file, request);
5775 if (status < 0)
5776 goto out;
19e03c57 5777 down_read(&nfsi->rwsem);
01c3b861 5778 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5779 /* Yes: cache locks! */
01c3b861 5780 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5781 request->fl_flags = fl_flags & ~FL_SLEEP;
5782 status = do_vfs_lock(request->fl_file, request);
5783 goto out_unlock;
01c3b861 5784 }
9a99af49
TM		 5785 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5786 up_read(&nfsi->rwsem);
afe6c27c 5787 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5788 if (status != 0)
9a99af49
TM		 5789 goto out;
5790 down_read(&nfsi->rwsem);
5791 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5792 status = -NFS4ERR_DELAY;
01c3b861 5793 goto out_unlock;
9a99af49 5794 }
6bfc93ef 5795 /* Note: we always want to sleep here! */
01c3b861 5796 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5797 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5798 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5799 "manager!\n", __func__);
01c3b861 5800out_unlock:
19e03c57 5801 up_read(&nfsi->rwsem);
01c3b861
TM		 5802out:
5803 request->fl_flags = fl_flags;
1da177e4
LT		 5804 return status;
5805}
5806
5807static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5808{
a1d0b5ee
TM		 5809 struct nfs4_exception exception = {
5810 .state = state,
05ffe24f 5811 .inode = state->inode,
a1d0b5ee 5812 };
1da177e4
LT		 5813 int err;
5814
5815 do {
965b5d67 5816 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5817 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5818 if (err == -NFS4ERR_DENIED)
5819 err = -EAGAIN;
1da177e4 5820 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5821 err, &exception);
1da177e4
LT		 5822 } while (exception.retry);
5823 return err;
5824}
5825
5826static int
5827nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5828{
5829 struct nfs_open_context *ctx;
5830 struct nfs4_state *state;
5831 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5832 int status;
5833
5834 /* verify open state */
cd3758e3 5835 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5836 state = ctx->state;
5837
5838 if (request->fl_start < 0 || request->fl_end < 0)
5839 return -EINVAL;
5840
d953126a
TM		 5841 if (IS_GETLK(cmd)) {
5842 if (state != NULL)
5843 return nfs4_proc_getlk(state, F_GETLK, request);
5844 return 0;
5845 }
1da177e4
LT		 5846
5847 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5848 return -EINVAL;
5849
d953126a
TM		 5850 if (request->fl_type == F_UNLCK) {
5851 if (state != NULL)
5852 return nfs4_proc_unlck(state, cmd, request);
5853 return 0;
5854 }
1da177e4 5855
d953126a
TM		 5856 if (state == NULL)
5857 return -ENOLCK;
55725513
TM		 5858 /*
5859 * Don't rely on the VFS having checked the file open mode,
5860 * since it won't do this for flock() locks.
5861 */
f44106e2 5862 switch (request->fl_type) {
55725513
TM		 5863 case F_RDLCK:
5864 if (!(filp->f_mode & FMODE_READ))
5865 return -EBADF;
5866 break;
5867 case F_WRLCK:
5868 if (!(filp->f_mode & FMODE_WRITE))
5869 return -EBADF;
5870 }
5871
1da177e4
LT		 5872 do {
5873 status = nfs4_proc_setlk(state, cmd, request);
5874 if ((status != -EAGAIN) || IS_SETLK(cmd))
5875 break;
5876 timeout = nfs4_set_lock_task_retry(timeout);
5877 status = -ERESTARTSYS;
5878 if (signalled())
5879 break;
5880 } while(status < 0);
1da177e4
LT		 5881 return status;
5882}
5883
db4f2e63 5884int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5885{
5886 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5887 int err;
5888
5889 err = nfs4_set_lock_state(state, fl);
5890 if (err != 0)
db4f2e63 5891 return err;
4a706fa0 5892 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5893 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5894}
6b3b5496 5895
cf470c3e
TM		 5896struct nfs_release_lockowner_data {
5897 struct nfs4_lock_state *lsp;
5ae67c4f 5898 struct nfs_server *server;
cf470c3e 5899 struct nfs_release_lockowner_args args;
b7e63a10 5900 struct nfs_release_lockowner_res res;
60ea6812 5901 unsigned long timestamp;
cf470c3e
TM		 5902};
5903
fbd4bfd1
CL		 5904static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5905{
5906 struct nfs_release_lockowner_data *data = calldata;
5907 nfs40_setup_sequence(data->server,
b7e63a10 5908 &data->args.seq_args, &data->res.seq_res, task);
60ea6812 5909 data->timestamp = jiffies;
fbd4bfd1
CL		 5910}
5911
5912static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5913{
5914 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5915 struct nfs_server *server = data->server;
5916
b7e63a10 5917 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5918
5919 switch (task->tk_status) {
5920 case 0:
5921 renew_lease(server, data->timestamp);
5922 break;
5923 case -NFS4ERR_STALE_CLIENTID:
5924 case -NFS4ERR_EXPIRED:
5925 case -NFS4ERR_LEASE_MOVED:
5926 case -NFS4ERR_DELAY:
5927 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5928 rpc_restart_call_prepare(task);
5929 }
fbd4bfd1
CL		 5930}
5931
d3c7b7cc
TM		 5932static void nfs4_release_lockowner_release(void *calldata)
5933{
cf470c3e 5934 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5935 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5936 kfree(calldata);
5937}
5938
17280175 5939static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5940 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5941 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5942 .rpc_release = nfs4_release_lockowner_release,
5943};
5944
f1cdae87
JL		 5945static void
5946nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5947{
cf470c3e 5948 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5949 struct rpc_message msg = {
5950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5951 };
5952
5953 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 5954 return;
fbd4bfd1 5955
cf470c3e
TM		 5956 data = kmalloc(sizeof(*data), GFP_NOFS);
5957 if (!data)
f1cdae87 5958 return;
cf470c3e 5959 data->lsp = lsp;
5ae67c4f 5960 data->server = server;
cf470c3e
TM		 5961 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5962 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5963 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5964
cf470c3e 5965 msg.rpc_argp = &data->args;
b7e63a10
TM		 5966 msg.rpc_resp = &data->res;
5967 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 5968 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 5969}
5970
aa1870af
BF		 5971#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5972
64c2ce8b
AK		 5973static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5974 const void *buf, size_t buflen,
5975 int flags, int type)
6b3b5496 5976{
64c2ce8b
AK		 5977 if (strcmp(key, "") != 0)
5978 return -EINVAL;
4b580ee3 5979
64c2ce8b 5980 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5981}
5982
64c2ce8b
AK		 5983static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5984 void *buf, size_t buflen, int type)
6b3b5496 5985{
64c2ce8b
AK		 5986 if (strcmp(key, "") != 0)
5987 return -EINVAL;
aa1870af 5988
64c2ce8b 5989 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5990}
5991
64c2ce8b
AK		 5992static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5993 size_t list_len, const char *name,
5994 size_t name_len, int type)
6b3b5496 5995{
64c2ce8b 5996 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5997
096455a2
BF		 5998 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5999 return 0;
64c2ce8b
AK		 6000
6001 if (list && len <= list_len)
6002 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6003 return len;
6b3b5496
BF		 6004}
6005
c9bccef6
DQ		 6006#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6007static inline int nfs4_server_supports_labels(struct nfs_server *server)
6008{
6009 return server->caps & NFS_CAP_SECURITY_LABEL;
6010}
6011
6012static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6013 const void *buf, size_t buflen,
6014 int flags, int type)
6015{
6016 if (security_ismaclabel(key))
6017 return nfs4_set_security_label(dentry, buf, buflen);
6018
6019 return -EOPNOTSUPP;
6020}
6021
6022static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6023 void *buf, size_t buflen, int type)
6024{
6025 if (security_ismaclabel(key))
6026 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6027 return -EOPNOTSUPP;
6028}
6029
6030static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6031 size_t list_len, const char *name,
6032 size_t name_len, int type)
6033{
6034 size_t len = 0;
6035
6036 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6037 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6038 if (list && len <= list_len)
6039 security_inode_listsecurity(dentry->d_inode, list, len);
6040 }
6041 return len;
6042}
6043
6044static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6045 .prefix = XATTR_SECURITY_PREFIX,
6046 .list = nfs4_xattr_list_nfs4_label,
6047 .get = nfs4_xattr_get_nfs4_label,
6048 .set = nfs4_xattr_set_nfs4_label,
6049};
6050#endif
6051
6052
533eb461
AA		 6053/*
6054 * nfs_fhget will use either the mounted_on_fileid or the fileid
6055 */
69aaaae1
TM		 6056static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6057{
533eb461
AA		 6058 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6059 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6060 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6061 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6062 return;
6063
6064 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6065 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6066 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6067 fattr->nlink = 2;
6068}
6069
f05d147f
BS		 6070static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6071 const struct qstr *name,
6072 struct nfs4_fs_locations *fs_locations,
6073 struct page *page)
683b57b4
TM		 6074{
6075 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6076 u32 bitmask[3] = {
361e624f 6077 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6078 };
6079 struct nfs4_fs_locations_arg args = {
6080 .dir_fh = NFS_FH(dir),
c228fd3a 6081 .name = name,
683b57b4
TM		 6082 .page = page,
6083 .bitmask = bitmask,
6084 };
22958463
BH		 6085 struct nfs4_fs_locations_res res = {
6086 .fs_locations = fs_locations,
6087 };
683b57b4
TM		 6088 struct rpc_message msg = {
6089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6090 .rpc_argp = &args,
22958463 6091 .rpc_resp = &res,
683b57b4
TM		 6092 };
6093 int status;
6094
3110ff80 6095 dprintk("%s: start\n", __func__);
533eb461
AA		 6096
6097 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6098 * is not supported */
6099 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6100 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6101 else
6102 bitmask[0] |= FATTR4_WORD0_FILEID;
6103
c228fd3a 6104 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6105 fs_locations->server = server;
830b8e33 6106 fs_locations->nlocations = 0;
f05d147f 6107 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6108 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6109 return status;
6110}
6111
f05d147f
BS		 6112int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6113 const struct qstr *name,
6114 struct nfs4_fs_locations *fs_locations,
6115 struct page *page)
db0a9593
BS		 6116{
6117 struct nfs4_exception exception = { };
6118 int err;
6119 do {
078ea3df
TM		 6120 err = _nfs4_proc_fs_locations(client, dir, name,
6121 fs_locations, page);
6122 trace_nfs4_get_fs_locations(dir, name, err);
6123 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6124 &exception);
6125 } while (exception.retry);
6126 return err;
6127}
6128
b03d735b
CL		 6129/*
6130 * This operation also signals the server that this client is
6131 * performing migration recovery. The server can stop returning
6132 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6133 * appended to this compound to identify the client ID which is
6134 * performing recovery.
6135 */
6136static int _nfs40_proc_get_locations(struct inode *inode,
6137 struct nfs4_fs_locations *locations,
6138 struct page *page, struct rpc_cred *cred)
6139{
6140 struct nfs_server *server = NFS_SERVER(inode);
6141 struct rpc_clnt *clnt = server->client;
6142 u32 bitmask[2] = {
6143 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6144 };
6145 struct nfs4_fs_locations_arg args = {
6146 .clientid = server->nfs_client->cl_clientid,
6147 .fh = NFS_FH(inode),
6148 .page = page,
6149 .bitmask = bitmask,
6150 .migration = 1, /* skip LOOKUP */
6151 .renew = 1, /* append RENEW */
6152 };
6153 struct nfs4_fs_locations_res res = {
6154 .fs_locations = locations,
6155 .migration = 1,
6156 .renew = 1,
6157 };
6158 struct rpc_message msg = {
6159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6160 .rpc_argp = &args,
6161 .rpc_resp = &res,
6162 .rpc_cred = cred,
6163 };
6164 unsigned long now = jiffies;
6165 int status;
6166
6167 nfs_fattr_init(&locations->fattr);
6168 locations->server = server;
6169 locations->nlocations = 0;
6170
6171 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6172 nfs4_set_sequence_privileged(&args.seq_args);
6173 status = nfs4_call_sync_sequence(clnt, server, &msg,
6174 &args.seq_args, &res.seq_res);
6175 if (status)
6176 return status;
6177
6178 renew_lease(server, now);
6179 return 0;
6180}
6181
6182#ifdef CONFIG_NFS_V4_1
6183
6184/*
6185 * This operation also signals the server that this client is
6186 * performing migration recovery. The server can stop asserting
6187 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6188 * performing this operation is identified in the SEQUENCE
6189 * operation in this compound.
6190 *
6191 * When the client supports GETATTR(fs_locations_info), it can
6192 * be plumbed in here.
6193 */
6194static int _nfs41_proc_get_locations(struct inode *inode,
6195 struct nfs4_fs_locations *locations,
6196 struct page *page, struct rpc_cred *cred)
6197{
6198 struct nfs_server *server = NFS_SERVER(inode);
6199 struct rpc_clnt *clnt = server->client;
6200 u32 bitmask[2] = {
6201 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6202 };
6203 struct nfs4_fs_locations_arg args = {
6204 .fh = NFS_FH(inode),
6205 .page = page,
6206 .bitmask = bitmask,
6207 .migration = 1, /* skip LOOKUP */
6208 };
6209 struct nfs4_fs_locations_res res = {
6210 .fs_locations = locations,
6211 .migration = 1,
6212 };
6213 struct rpc_message msg = {
6214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6215 .rpc_argp = &args,
6216 .rpc_resp = &res,
6217 .rpc_cred = cred,
6218 };
6219 int status;
6220
6221 nfs_fattr_init(&locations->fattr);
6222 locations->server = server;
6223 locations->nlocations = 0;
6224
6225 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6226 nfs4_set_sequence_privileged(&args.seq_args);
6227 status = nfs4_call_sync_sequence(clnt, server, &msg,
6228 &args.seq_args, &res.seq_res);
6229 if (status == NFS4_OK &&
6230 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6231 status = -NFS4ERR_LEASE_MOVED;
6232 return status;
6233}
6234
6235#endif /* CONFIG_NFS_V4_1 */
6236
6237/**
6238 * nfs4_proc_get_locations - discover locations for a migrated FSID
6239 * @inode: inode on FSID that is migrating
6240 * @locations: result of query
6241 * @page: buffer
6242 * @cred: credential to use for this operation
6243 *
6244 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6245 * operation failed, or a negative errno if a local error occurred.
6246 *
6247 * On success, "locations" is filled in, but if the server has
6248 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6249 * asserted.
6250 *
6251 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6252 * from this client that require migration recovery.
6253 */
6254int nfs4_proc_get_locations(struct inode *inode,
6255 struct nfs4_fs_locations *locations,
6256 struct page *page, struct rpc_cred *cred)
6257{
6258 struct nfs_server *server = NFS_SERVER(inode);
6259 struct nfs_client *clp = server->nfs_client;
6260 const struct nfs4_mig_recovery_ops *ops =
6261 clp->cl_mvops->mig_recovery_ops;
6262 struct nfs4_exception exception = { };
6263 int status;
6264
6265 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6266 (unsigned long long)server->fsid.major,
6267 (unsigned long long)server->fsid.minor,
6268 clp->cl_hostname);
6269 nfs_display_fhandle(NFS_FH(inode), __func__);
6270
6271 do {
6272 status = ops->get_locations(inode, locations, page, cred);
6273 if (status != -NFS4ERR_DELAY)
6274 break;
6275 nfs4_handle_exception(server, status, &exception);
6276 } while (exception.retry);
6277 return status;
6278}
6279
44c99933
CL		 6280/*
6281 * This operation also signals the server that this client is
6282 * performing "lease moved" recovery. The server can stop
6283 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6284 * is appended to this compound to identify the client ID which is
6285 * performing recovery.
6286 */
6287static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6288{
6289 struct nfs_server *server = NFS_SERVER(inode);
6290 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6291 struct rpc_clnt *clnt = server->client;
6292 struct nfs4_fsid_present_arg args = {
6293 .fh = NFS_FH(inode),
6294 .clientid = clp->cl_clientid,
6295 .renew = 1, /* append RENEW */
6296 };
6297 struct nfs4_fsid_present_res res = {
6298 .renew = 1,
6299 };
6300 struct rpc_message msg = {
6301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6302 .rpc_argp = &args,
6303 .rpc_resp = &res,
6304 .rpc_cred = cred,
6305 };
6306 unsigned long now = jiffies;
6307 int status;
6308
6309 res.fh = nfs_alloc_fhandle();
6310 if (res.fh == NULL)
6311 return -ENOMEM;
6312
6313 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6314 nfs4_set_sequence_privileged(&args.seq_args);
6315 status = nfs4_call_sync_sequence(clnt, server, &msg,
6316 &args.seq_args, &res.seq_res);
6317 nfs_free_fhandle(res.fh);
6318 if (status)
6319 return status;
6320
6321 do_renew_lease(clp, now);
6322 return 0;
6323}
6324
6325#ifdef CONFIG_NFS_V4_1
6326
6327/*
6328 * This operation also signals the server that this client is
6329 * performing "lease moved" recovery. The server can stop asserting
6330 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6331 * this operation is identified in the SEQUENCE operation in this
6332 * compound.
6333 */
6334static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6335{
6336 struct nfs_server *server = NFS_SERVER(inode);
6337 struct rpc_clnt *clnt = server->client;
6338 struct nfs4_fsid_present_arg args = {
6339 .fh = NFS_FH(inode),
6340 };
6341 struct nfs4_fsid_present_res res = {
6342 };
6343 struct rpc_message msg = {
6344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6345 .rpc_argp = &args,
6346 .rpc_resp = &res,
6347 .rpc_cred = cred,
6348 };
6349 int status;
6350
6351 res.fh = nfs_alloc_fhandle();
6352 if (res.fh == NULL)
6353 return -ENOMEM;
6354
6355 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6356 nfs4_set_sequence_privileged(&args.seq_args);
6357 status = nfs4_call_sync_sequence(clnt, server, &msg,
6358 &args.seq_args, &res.seq_res);
6359 nfs_free_fhandle(res.fh);
6360 if (status == NFS4_OK &&
6361 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6362 status = -NFS4ERR_LEASE_MOVED;
6363 return status;
6364}
6365
6366#endif /* CONFIG_NFS_V4_1 */
6367
6368/**
6369 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6370 * @inode: inode on FSID to check
6371 * @cred: credential to use for this operation
6372 *
6373 * Server indicates whether the FSID is present, moved, or not
6374 * recognized. This operation is necessary to clear a LEASE_MOVED
6375 * condition for this client ID.
6376 *
6377 * Returns NFS4_OK if the FSID is present on this server,
6378 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6379 * NFS4ERR code if some error occurred on the server, or a
6380 * negative errno if a local failure occurred.
6381 */
6382int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6383{
6384 struct nfs_server *server = NFS_SERVER(inode);
6385 struct nfs_client *clp = server->nfs_client;
6386 const struct nfs4_mig_recovery_ops *ops =
6387 clp->cl_mvops->mig_recovery_ops;
6388 struct nfs4_exception exception = { };
6389 int status;
6390
6391 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6392 (unsigned long long)server->fsid.major,
6393 (unsigned long long)server->fsid.minor,
6394 clp->cl_hostname);
6395 nfs_display_fhandle(NFS_FH(inode), __func__);
6396
6397 do {
6398 status = ops->fsid_present(inode, cred);
6399 if (status != -NFS4ERR_DELAY)
6400 break;
6401 nfs4_handle_exception(server, status, &exception);
6402 } while (exception.retry);
6403 return status;
6404}
6405
5ec16a85 6406/**
a5250def
WAA		 6407 * If 'use_integrity' is true and the state managment nfs_client
6408 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6409 * and the machine credential as per RFC3530bis and RFC5661 Security
6410 * Considerations sections. Otherwise, just use the user cred with the
6411 * filesystem's rpc_client.
5ec16a85 6412 */
a5250def 6413static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6414{
6415 int status;
6416 struct nfs4_secinfo_arg args = {
6417 .dir_fh = NFS_FH(dir),
6418 .name = name,
6419 };
6420 struct nfs4_secinfo_res res = {
6421 .flavors = flavors,
6422 };
6423 struct rpc_message msg = {
6424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6425 .rpc_argp = &args,
6426 .rpc_resp = &res,
6427 };
a5250def 6428 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6429 struct rpc_cred *cred = NULL;
a5250def
WAA		 6430
6431 if (use_integrity) {
6432 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6433 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6434 msg.rpc_cred = cred;
a5250def 6435 }
5a5ea0d4
BS		 6436
6437 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6438
6439 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6440 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6441
a5250def
WAA		 6442 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6443 &res.seq_res, 0);
5a5ea0d4 6444 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6445
7cb852df
WAA		 6446 if (cred)
6447 put_rpccred(cred);
a5250def 6448
5a5ea0d4
BS		 6449 return status;
6450}
6451
72de53ec
BS		 6452int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6453 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6454{
6455 struct nfs4_exception exception = { };
6456 int err;
6457 do {
a5250def
WAA		 6458 err = -NFS4ERR_WRONGSEC;
6459
6460 /* try to use integrity protection with machine cred */
6461 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6462 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6463
6464 /*
6465 * if unable to use integrity protection, or SECINFO with
6466 * integrity protection returns NFS4ERR_WRONGSEC (which is
6467 * disallowed by spec, but exists in deployed servers) use
6468 * the current filesystem's rpc_client and the user cred.
6469 */
6470 if (err == -NFS4ERR_WRONGSEC)
6471 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6472
078ea3df
TM		 6473 trace_nfs4_secinfo(dir, name, err);
6474 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6475 &exception);
6476 } while (exception.retry);
6477 return err;
6478}
6479
557134a3 6480#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6481/*
6482 * Check the exchange flags returned by the server for invalid flags, having
6483 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6484 * DS flags set.
6485 */
6486static int nfs4_check_cl_exchange_flags(u32 flags)
6487{
6488 if (flags & ~EXCHGID4_FLAG_MASK_R)
6489 goto out_inval;
6490 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6491 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6492 goto out_inval;
6493 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6494 goto out_inval;
6495 return NFS_OK;
6496out_inval:
6497 return -NFS4ERR_INVAL;
6498}
6499
78fe0f41 6500static bool
79d4e1f0
CL		 6501nfs41_same_server_scope(struct nfs41_server_scope *a,
6502 struct nfs41_server_scope *b)
78fe0f41
WAA		 6503{
6504 if (a->server_scope_sz == b->server_scope_sz &&
6505 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6506 return true;
6507
6508 return false;
6509}
6510
7c44f1ae
WAA		 6511/*
6512 * nfs4_proc_bind_conn_to_session()
6513 *
6514 * The 4.1 client currently uses the same TCP connection for the
6515 * fore and backchannel.
6516 */
2cf047c9 6517int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6518{
6519 int status;
6520 struct nfs41_bind_conn_to_session_res res;
6521 struct rpc_message msg = {
6522 .rpc_proc =
6523 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6524 .rpc_argp = clp,
6525 .rpc_resp = &res,
2cf047c9 6526 .rpc_cred = cred,
7c44f1ae
WAA		 6527 };
6528
6529 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6530
6531 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6532 if (unlikely(res.session == NULL)) {
6533 status = -ENOMEM;
6534 goto out;
6535 }
6536
6537 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6538 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6539 if (status == 0) {
6540 if (memcmp(res.session->sess_id.data,
6541 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6542 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6543 status = -EIO;
6544 goto out_session;
6545 }
6546 if (res.dir != NFS4_CDFS4_BOTH) {
6547 dprintk("NFS: %s: Unexpected direction from server\n",
6548 __func__);
6549 status = -EIO;
6550 goto out_session;
6551 }
6552 if (res.use_conn_in_rdma_mode) {
6553 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6554 __func__);
6555 status = -EIO;
6556 goto out_session;
6557 }
6558 }
6559out_session:
6560 kfree(res.session);
6561out:
6562 dprintk("<-- %s status= %d\n", __func__, status);
6563 return status;
6564}
6565
99fe60d0 6566/*
fa940720
WAA		 6567 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6568 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6569 */
6570static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6571 .how = SP4_MACH_CRED,
6572 .enforce.u.words = {
6573 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6574 1 << (OP_EXCHANGE_ID - 32) |
6575 1 << (OP_CREATE_SESSION - 32) |
6576 1 << (OP_DESTROY_SESSION - 32) |
6577 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6578 },
6579 .allow.u.words = {
6580 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6581 1 << (OP_LOCKU) |
6582 1 << (OP_COMMIT),
8b5bee2e 6583 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6584 1 << (OP_SECINFO_NO_NAME - 32) |
6585 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6586 1 << (OP_FREE_STATEID - 32) |
6587 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6588 }
6589};
6590
6591/*
6592 * Select the state protection mode for client `clp' given the server results
6593 * from exchange_id in `sp'.
99fe60d0 6594 *
2031cd1a
WAA		 6595 * Returns 0 on success, negative errno otherwise.
6596 */
6597static int nfs4_sp4_select_mode(struct nfs_client *clp,
6598 struct nfs41_state_protection *sp)
6599{
6600 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6601 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6602 1 << (OP_EXCHANGE_ID - 32) |
6603 1 << (OP_CREATE_SESSION - 32) |
6604 1 << (OP_DESTROY_SESSION - 32) |
6605 1 << (OP_DESTROY_CLIENTID - 32)
6606 };
6607 unsigned int i;
6608
6609 if (sp->how == SP4_MACH_CRED) {
6610 /* Print state protect result */
6611 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6612 for (i = 0; i <= LAST_NFS4_OP; i++) {
6613 if (test_bit(i, sp->enforce.u.longs))
6614 dfprintk(MOUNT, " enforce op %d\n", i);
6615 if (test_bit(i, sp->allow.u.longs))
6616 dfprintk(MOUNT, " allow op %d\n", i);
6617 }
6618
6619 /* make sure nothing is on enforce list that isn't supported */
6620 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6621 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6622 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6623 return -EINVAL;
6624 }
6625 }
6626
6627 /*
6628 * Minimal mode - state operations are allowed to use machine
6629 * credential. Note this already happens by default, so the
6630 * client doesn't have to do anything more than the negotiation.
6631 *
6632 * NOTE: we don't care if EXCHANGE_ID is in the list -
6633 * we're already using the machine cred for exchange_id
6634 * and will never use a different cred.
6635 */
6636 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6637 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6638 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6639 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6640 dfprintk(MOUNT, "sp4_mach_cred:\n");
6641 dfprintk(MOUNT, " minimal mode enabled\n");
6642 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6643 } else {
6644 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6645 return -EINVAL;
6646 }
fa940720
WAA		 6647
6648 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6649 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6650 dfprintk(MOUNT, " cleanup mode enabled\n");
6651 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6652 }
8b5bee2e
WAA		 6653
6654 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6655 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6656 dfprintk(MOUNT, " secinfo mode enabled\n");
6657 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6658 }
3787d506
WAA		 6659
6660 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6661 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6662 dfprintk(MOUNT, " stateid mode enabled\n");
6663 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6664 }
8c21c62c
WAA		 6665
6666 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6667 dfprintk(MOUNT, " write mode enabled\n");
6668 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6669 }
6670
6671 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6672 dfprintk(MOUNT, " commit mode enabled\n");
6673 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6674 }
2031cd1a
WAA		 6675 }
6676
6677 return 0;
6678}
6679
6680/*
6681 * _nfs4_proc_exchange_id()
6bbb4ae8 6682 *
2031cd1a 6683 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6684 */
2031cd1a
WAA		 6685static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6686 u32 sp4_how)
99fe60d0
BH		 6687{
6688 nfs4_verifier verifier;
6689 struct nfs41_exchange_id_args args = {
cd93710e 6690 .verifier = &verifier,
99fe60d0 6691 .client = clp,
cd3fadec 6692#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6693 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6694 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6695 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6696#else
6697 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6698 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6699#endif
99fe60d0
BH		 6700 };
6701 struct nfs41_exchange_id_res res = {
32b01310 6702 0
99fe60d0
BH		 6703 };
6704 int status;
6705 struct rpc_message msg = {
6706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6707 .rpc_argp = &args,
6708 .rpc_resp = &res,
6709 .rpc_cred = cred,
6710 };
99fe60d0 6711
f092075d 6712 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6713 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6714 sizeof(args.id));
6bbb4ae8
CL		 6715 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6716 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6717 args.id_len, args.id);
99fe60d0 6718
acdeb69d 6719 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6720 GFP_NOFS);
acdeb69d 6721 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6722 status = -ENOMEM;
6723 goto out;
6724 }
78fe0f41 6725
79d4e1f0 6726 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6727 GFP_NOFS);
177313f1 6728 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6729 status = -ENOMEM;
acdeb69d 6730 goto out_server_owner;
abe9a6d5 6731 }
78fe0f41 6732
bbafffd2 6733 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6734 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6735 status = -ENOMEM;
6736 goto out_server_scope;
6737 }
6738
2031cd1a
WAA		 6739 switch (sp4_how) {
6740 case SP4_NONE:
6741 args.state_protect.how = SP4_NONE;
6742 break;
6743
6744 case SP4_MACH_CRED:
6745 args.state_protect = nfs4_sp4_mach_cred_request;
6746 break;
6747
6748 default:
6749 /* unsupported! */
6750 WARN_ON_ONCE(1);
6751 status = -EINVAL;
6752 goto out_server_scope;
6753 }
6754
1bd714f2 6755 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6756 trace_nfs4_exchange_id(clp, status);
177313f1 6757 if (status == 0)
32b01310 6758 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6759
2031cd1a
WAA		 6760 if (status == 0)
6761 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6762
acdeb69d 6763 if (status == 0) {
32b01310
TM		 6764 clp->cl_clientid = res.clientid;
6765 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6766 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6767 clp->cl_seqid = res.seqid;
6768
acdeb69d
CL		 6769 kfree(clp->cl_serverowner);
6770 clp->cl_serverowner = res.server_owner;
6771 res.server_owner = NULL;
78fe0f41 6772
7d2ed9ac 6773 /* use the most recent implementation id */
59155546
CL		 6774 kfree(clp->cl_implid);
6775 clp->cl_implid = res.impl_id;
7d2ed9ac 6776
177313f1 6777 if (clp->cl_serverscope != NULL &&
79d4e1f0 6778 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6779 res.server_scope)) {
6780 dprintk("%s: server_scope mismatch detected\n",
6781 __func__);
6782 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6783 kfree(clp->cl_serverscope);
6784 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6785 }
6786
177313f1 6787 if (clp->cl_serverscope == NULL) {
79d4e1f0 6788 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6789 goto out;
6790 }
32b01310
TM		 6791 } else
6792 kfree(res.impl_id);
7d2ed9ac 6793
acdeb69d
CL		 6794out_server_owner:
6795 kfree(res.server_owner);
7d2ed9ac 6796out_server_scope:
abe9a6d5
WAA		 6797 kfree(res.server_scope);
6798out:
177313f1 6799 if (clp->cl_implid != NULL)
6bbb4ae8 6800 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6801 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6802 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6803 clp->cl_implid->date.seconds,
6804 clp->cl_implid->date.nseconds);
6bbb4ae8 6805 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6806 return status;
6807}
6808
2031cd1a
WAA		 6809/*
6810 * nfs4_proc_exchange_id()
6811 *
6812 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6813 *
6814 * Since the clientid has expired, all compounds using sessions
6815 * associated with the stale clientid will be returning
6816 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6817 * be in some phase of session reset.
6818 *
6819 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6820 */
6821int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6822{
6823 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6824 int status;
6825
6826 /* try SP4_MACH_CRED if krb5i/p */
6827 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6828 authflavor == RPC_AUTH_GSS_KRB5P) {
6829 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6830 if (!status)
6831 return 0;
6832 }
6833
6834 /* try SP4_NONE */
6835 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6836}
6837
66245539
TM		 6838static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6839 struct rpc_cred *cred)
6840{
6841 struct rpc_message msg = {
6842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6843 .rpc_argp = clp,
6844 .rpc_cred = cred,
6845 };
6846 int status;
6847
6848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6849 trace_nfs4_destroy_clientid(clp, status);
66245539 6850 if (status)
02c67525 6851 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6852 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6853 return status;
6854}
6855
6856static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6857 struct rpc_cred *cred)
6858{
6859 unsigned int loop;
6860 int ret;
6861
6862 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6863 ret = _nfs4_proc_destroy_clientid(clp, cred);
6864 switch (ret) {
6865 case -NFS4ERR_DELAY:
6866 case -NFS4ERR_CLIENTID_BUSY:
6867 ssleep(1);
6868 break;
6869 default:
6870 return ret;
6871 }
6872 }
6873 return 0;
6874}
6875
6876int nfs4_destroy_clientid(struct nfs_client *clp)
6877{
6878 struct rpc_cred *cred;
6879 int ret = 0;
6880
6881 if (clp->cl_mvops->minor_version < 1)
6882 goto out;
6883 if (clp->cl_exchange_flags == 0)
6884 goto out;
05f4c350
CL		 6885 if (clp->cl_preserve_clid)
6886 goto out;
73d8bde5 6887 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6888 ret = nfs4_proc_destroy_clientid(clp, cred);
6889 if (cred)
6890 put_rpccred(cred);
6891 switch (ret) {
6892 case 0:
6893 case -NFS4ERR_STALE_CLIENTID:
6894 clp->cl_exchange_flags = 0;
6895 }
6896out:
6897 return ret;
6898}
6899
2050f0cc
AA		 6900struct nfs4_get_lease_time_data {
6901 struct nfs4_get_lease_time_args *args;
6902 struct nfs4_get_lease_time_res *res;
6903 struct nfs_client *clp;
6904};
6905
6906static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6907 void *calldata)
6908{
2050f0cc
AA		 6909 struct nfs4_get_lease_time_data *data =
6910 (struct nfs4_get_lease_time_data *)calldata;
6911
6912 dprintk("--> %s\n", __func__);
6913 /* just setup sequence, do not trigger session recovery
6914 since we're invoked within one */
d9afbd1b
TM		 6915 nfs41_setup_sequence(data->clp->cl_session,
6916 &data->args->la_seq_args,
6917 &data->res->lr_seq_res,
6918 task);
2050f0cc
AA		 6919 dprintk("<-- %s\n", __func__);
6920}
6921
6922/*
6923 * Called from nfs4_state_manager thread for session setup, so don't recover
6924 * from sequence operation or clientid errors.
6925 */
6926static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6927{
6928 struct nfs4_get_lease_time_data *data =
6929 (struct nfs4_get_lease_time_data *)calldata;
6930
6931 dprintk("--> %s\n", __func__);
14516c3a
TM		 6932 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6933 return;
2050f0cc
AA		 6934 switch (task->tk_status) {
6935 case -NFS4ERR_DELAY:
6936 case -NFS4ERR_GRACE:
6937 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6938 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6939 task->tk_status = 0;
a8a4ae3a
AA		 6940 /* fall through */
6941 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6942 rpc_restart_call_prepare(task);
2050f0cc
AA		 6943 return;
6944 }
2050f0cc
AA		 6945 dprintk("<-- %s\n", __func__);
6946}
6947
17280175 6948static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6949 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6950 .rpc_call_done = nfs4_get_lease_time_done,
6951};
6952
6953int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6954{
6955 struct rpc_task *task;
6956 struct nfs4_get_lease_time_args args;
6957 struct nfs4_get_lease_time_res res = {
6958 .lr_fsinfo = fsinfo,
6959 };
6960 struct nfs4_get_lease_time_data data = {
6961 .args = &args,
6962 .res = &res,
6963 .clp = clp,
6964 };
6965 struct rpc_message msg = {
6966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6967 .rpc_argp = &args,
6968 .rpc_resp = &res,
6969 };
6970 struct rpc_task_setup task_setup = {
6971 .rpc_client = clp->cl_rpcclient,
6972 .rpc_message = &msg,
6973 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6974 .callback_data = &data,
6975 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6976 };
6977 int status;
6978
a9c92d6b 6979 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6980 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6981 dprintk("--> %s\n", __func__);
6982 task = rpc_run_task(&task_setup);
6983
6984 if (IS_ERR(task))
6985 status = PTR_ERR(task);
6986 else {
6987 status = task->tk_status;
6988 rpc_put_task(task);
6989 }
6990 dprintk("<-- %s return %d\n", __func__, status);
6991
6992 return status;
6993}
6994
fc931582
AA		 6995/*
6996 * Initialize the values to be used by the client in CREATE_SESSION
6997 * If nfs4_init_session set the fore channel request and response sizes,
6998 * use them.
6999 *
7000 * Set the back channel max_resp_sz_cached to zero to force the client to
7001 * always set csa_cachethis to FALSE because the current implementation
7002 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7003 */
7004static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7005{
18aad3d5
AA		 7006 unsigned int max_rqst_sz, max_resp_sz;
7007
7008 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7009 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7010
fc931582 7011 /* Fore channel attributes */
18aad3d5
AA		 7012 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7013 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7014 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7015 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7016
7017 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7018 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7019 __func__,
7020 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7021 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7022
7023 /* Back channel attributes */
fc931582
AA		 7024 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7025 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7026 args->bc_attrs.max_resp_sz_cached = 0;
7027 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7028 args->bc_attrs.max_reqs = 1;
7029
7030 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7031 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7032 __func__,
7033 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7034 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7035 args->bc_attrs.max_reqs);
7036}
7037
43c2e885 7038static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7039{
43c2e885
BF		 7040 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7041 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7042
43c2e885
BF		 7043 if (rcvd->max_resp_sz > sent->max_resp_sz)
7044 return -EINVAL;
7045 /*
7046 * Our requested max_ops is the minimum we need; we're not
7047 * prepared to break up compounds into smaller pieces than that.
7048 * So, no point even trying to continue if the server won't
7049 * cooperate:
7050 */
7051 if (rcvd->max_ops < sent->max_ops)
7052 return -EINVAL;
7053 if (rcvd->max_reqs == 0)
7054 return -EINVAL;
b4b9a0c1
VG		 7055 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7056 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7057 return 0;
8d35301d
AA		 7058}
7059
43c2e885
BF		 7060static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7061{
7062 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7063 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7064
43c2e885
BF		 7065 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7066 return -EINVAL;
7067 if (rcvd->max_resp_sz < sent->max_resp_sz)
7068 return -EINVAL;
7069 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7070 return -EINVAL;
7071 /* These would render the backchannel useless: */
b4b9a0c1 7072 if (rcvd->max_ops != sent->max_ops)
43c2e885 7073 return -EINVAL;
b4b9a0c1 7074 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7075 return -EINVAL;
7076 return 0;
7077}
8d35301d 7078
8d35301d
AA		 7079static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7080 struct nfs4_session *session)
7081{
43c2e885 7082 int ret;
8d35301d 7083
43c2e885
BF		 7084 ret = nfs4_verify_fore_channel_attrs(args, session);
7085 if (ret)
7086 return ret;
7087 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7088}
7089
848f5bda
TM		 7090static int _nfs4_proc_create_session(struct nfs_client *clp,
7091 struct rpc_cred *cred)
fc931582
AA		 7092{
7093 struct nfs4_session *session = clp->cl_session;
7094 struct nfs41_create_session_args args = {
7095 .client = clp,
7096 .cb_program = NFS4_CALLBACK,
7097 };
7098 struct nfs41_create_session_res res = {
7099 .client = clp,
7100 };
7101 struct rpc_message msg = {
7102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7103 .rpc_argp = &args,
7104 .rpc_resp = &res,
848f5bda 7105 .rpc_cred = cred,
fc931582
AA		 7106 };
7107 int status;
7108
7109 nfs4_init_channel_attrs(&args);
0f91421e 7110 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7111
1bd714f2 7112 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7113 trace_nfs4_create_session(clp, status);
fc931582 7114
43095d39 7115 if (!status) {
8d35301d
AA		 7116 /* Verify the session's negotiated channel_attrs values */
7117 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7118 /* Increment the clientid slot sequence id */
7119 clp->cl_seqid++;
7120 }
7121
7122 return status;
7123}
7124
7125/*
7126 * Issues a CREATE_SESSION operation to the server.
7127 * It is the responsibility of the caller to verify the session is
7128 * expired before calling this routine.
7129 */
848f5bda 7130int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7131{
7132 int status;
7133 unsigned *ptr;
fc931582
AA		 7134 struct nfs4_session *session = clp->cl_session;
7135
7136 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7137
848f5bda 7138 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7139 if (status)
7140 goto out;
7141
aacd5537
AA		 7142 /* Init or reset the session slot tables */
7143 status = nfs4_setup_session_slot_tables(session);
7144 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7145 if (status)
7146 goto out;
7147
7148 ptr = (unsigned *)&session->sess_id.data[0];
7149 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7150 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7151out:
7152 dprintk("<-- %s\n", __func__);
7153 return status;
7154}
7155
0f3e66c6
AA		 7156/*
7157 * Issue the over-the-wire RPC DESTROY_SESSION.
7158 * The caller must serialize access to this routine.
7159 */
848f5bda
TM		 7160int nfs4_proc_destroy_session(struct nfs4_session *session,
7161 struct rpc_cred *cred)
0f3e66c6 7162{
848f5bda
TM		 7163 struct rpc_message msg = {
7164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7165 .rpc_argp = session,
7166 .rpc_cred = cred,
7167 };
0f3e66c6 7168 int status = 0;
0f3e66c6
AA		 7169
7170 dprintk("--> nfs4_proc_destroy_session\n");
7171
7172 /* session is still being setup */
7173 if (session->clp->cl_cons_state != NFS_CS_READY)
7174 return status;
7175
1bd714f2 7176 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7177 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7178
7179 if (status)
08106ac7 7180 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7181 "Session has been destroyed regardless...\n", status);
7182
7183 dprintk("<-- nfs4_proc_destroy_session\n");
7184 return status;
7185}
7186
fc01cea9
AA		 7187/*
7188 * Renew the cl_session lease.
7189 */
d5f8d3fe
TM		 7190struct nfs4_sequence_data {
7191 struct nfs_client *clp;
7192 struct nfs4_sequence_args args;
7193 struct nfs4_sequence_res res;
7194};
7195
dc96aef9
AB		 7196static void nfs41_sequence_release(void *data)
7197{
d5f8d3fe
TM		 7198 struct nfs4_sequence_data *calldata = data;
7199 struct nfs_client *clp = calldata->clp;
dc96aef9 7200
7135840f
AB		 7201 if (atomic_read(&clp->cl_count) > 1)
7202 nfs4_schedule_state_renewal(clp);
7203 nfs_put_client(clp);
d5f8d3fe 7204 kfree(calldata);
dc96aef9
AB		 7205}
7206
aa5190d0
TM		 7207static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7208{
7209 switch(task->tk_status) {
7210 case -NFS4ERR_DELAY:
aa5190d0
TM		 7211 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7212 return -EAGAIN;
7213 default:
0400a6b0 7214 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7215 }
7216 return 0;
7217}
7218
dc96aef9 7219static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7220{
d5f8d3fe
TM		 7221 struct nfs4_sequence_data *calldata = data;
7222 struct nfs_client *clp = calldata->clp;
fc01cea9 7223
14516c3a
TM		 7224 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7225 return;
fc01cea9 7226
c6d01c6f 7227 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7228 if (task->tk_status < 0) {
7229 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7230 if (atomic_read(&clp->cl_count) == 1)
7231 goto out;
fc01cea9 7232
aa5190d0
TM		 7233 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7234 rpc_restart_call_prepare(task);
fc01cea9
AA		 7235 return;
7236 }
7237 }
fc01cea9 7238 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7239out:
fc01cea9
AA		 7240 dprintk("<-- %s\n", __func__);
7241}
7242
7243static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7244{
d5f8d3fe
TM		 7245 struct nfs4_sequence_data *calldata = data;
7246 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7247 struct nfs4_sequence_args *args;
7248 struct nfs4_sequence_res *res;
7249
fc01cea9
AA		 7250 args = task->tk_msg.rpc_argp;
7251 res = task->tk_msg.rpc_resp;
7252
d9afbd1b 7253 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7254}
7255
7256static const struct rpc_call_ops nfs41_sequence_ops = {
7257 .rpc_call_done = nfs41_sequence_call_done,
7258 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7259 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7260};
7261
8fe72bac
TM		 7262static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7263 struct rpc_cred *cred,
7264 bool is_privileged)
fc01cea9 7265{
d5f8d3fe 7266 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7267 struct rpc_message msg = {
7268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7269 .rpc_cred = cred,
7270 };
71ac6da9
TM		 7271 struct rpc_task_setup task_setup_data = {
7272 .rpc_client = clp->cl_rpcclient,
7273 .rpc_message = &msg,
8fe72bac 7274 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7275 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7276 };
fc01cea9 7277
7135840f 7278 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7279 return ERR_PTR(-EIO);
dfb4f309 7280 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7281 if (calldata == NULL) {
7135840f 7282 nfs_put_client(clp);
71ac6da9 7283 return ERR_PTR(-ENOMEM);
fc01cea9 7284 }
a9c92d6b 7285 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7286 if (is_privileged)
7287 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7288 msg.rpc_argp = &calldata->args;
7289 msg.rpc_resp = &calldata->res;
7290 calldata->clp = clp;
71ac6da9 7291 task_setup_data.callback_data = calldata;
fc01cea9 7292
71ac6da9
TM		 7293 return rpc_run_task(&task_setup_data);
7294}
7295
2f60ea6b 7296static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7297{
7298 struct rpc_task *task;
7299 int ret = 0;
7300
2f60ea6b
TM		 7301 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7302 return 0;
8fe72bac 7303 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7304 if (IS_ERR(task))
7305 ret = PTR_ERR(task);
7306 else
bf294b41 7307 rpc_put_task_async(task);
71ac6da9
TM		 7308 dprintk("<-- %s status=%d\n", __func__, ret);
7309 return ret;
7310}
7311
7312static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7313{
7314 struct rpc_task *task;
7315 int ret;
7316
8fe72bac 7317 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7318 if (IS_ERR(task)) {
7319 ret = PTR_ERR(task);
7320 goto out;
7321 }
7322 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7323 if (!ret) {
7324 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7325
7326 if (task->tk_status == 0)
7327 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7328 ret = task->tk_status;
b4410c2f 7329 }
71ac6da9
TM		 7330 rpc_put_task(task);
7331out:
7332 dprintk("<-- %s status=%d\n", __func__, ret);
7333 return ret;
fc01cea9
AA		 7334}
7335
fce5c838
RL		 7336struct nfs4_reclaim_complete_data {
7337 struct nfs_client *clp;
7338 struct nfs41_reclaim_complete_args arg;
7339 struct nfs41_reclaim_complete_res res;
7340};
7341
7342static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7343{
7344 struct nfs4_reclaim_complete_data *calldata = data;
7345
d9afbd1b
TM		 7346 nfs41_setup_sequence(calldata->clp->cl_session,
7347 &calldata->arg.seq_args,
7348 &calldata->res.seq_res,
7349 task);
fce5c838
RL		 7350}
7351
aa5190d0
TM		 7352static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7353{
7354 switch(task->tk_status) {
7355 case 0:
7356 case -NFS4ERR_COMPLETE_ALREADY:
7357 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7358 break;
7359 case -NFS4ERR_DELAY:
aa5190d0 7360 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7361 /* fall through */
7362 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7363 return -EAGAIN;
7364 default:
0400a6b0 7365 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7366 }
7367 return 0;
7368}
7369
fce5c838
RL		 7370static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7371{
7372 struct nfs4_reclaim_complete_data *calldata = data;
7373 struct nfs_client *clp = calldata->clp;
7374 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7375
7376 dprintk("--> %s\n", __func__);
14516c3a
TM		 7377 if (!nfs41_sequence_done(task, res))
7378 return;
fce5c838 7379
c6d01c6f 7380 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7381 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7382 rpc_restart_call_prepare(task);
7383 return;
7384 }
fce5c838
RL		 7385 dprintk("<-- %s\n", __func__);
7386}
7387
7388static void nfs4_free_reclaim_complete_data(void *data)
7389{
7390 struct nfs4_reclaim_complete_data *calldata = data;
7391
7392 kfree(calldata);
7393}
7394
7395static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7396 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7397 .rpc_call_done = nfs4_reclaim_complete_done,
7398 .rpc_release = nfs4_free_reclaim_complete_data,
7399};
7400
7401/*
7402 * Issue a global reclaim complete.
7403 */
965e9c23
TM		 7404static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7405 struct rpc_cred *cred)
fce5c838
RL		 7406{
7407 struct nfs4_reclaim_complete_data *calldata;
7408 struct rpc_task *task;
7409 struct rpc_message msg = {
7410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7411 .rpc_cred = cred,
fce5c838
RL		 7412 };
7413 struct rpc_task_setup task_setup_data = {
7414 .rpc_client = clp->cl_rpcclient,
7415 .rpc_message = &msg,
7416 .callback_ops = &nfs4_reclaim_complete_call_ops,
7417 .flags = RPC_TASK_ASYNC,
7418 };
7419 int status = -ENOMEM;
7420
7421 dprintk("--> %s\n", __func__);
8535b2be 7422 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7423 if (calldata == NULL)
7424 goto out;
7425 calldata->clp = clp;
7426 calldata->arg.one_fs = 0;
fce5c838 7427
a9c92d6b 7428 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7429 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7430 msg.rpc_argp = &calldata->arg;
7431 msg.rpc_resp = &calldata->res;
7432 task_setup_data.callback_data = calldata;
7433 task = rpc_run_task(&task_setup_data);
acf82b85 7434 if (IS_ERR(task)) {
fce5c838 7435 status = PTR_ERR(task);
acf82b85
DC		 7436 goto out;
7437 }
c34c32ea
AA		 7438 status = nfs4_wait_for_completion_rpc_task(task);
7439 if (status == 0)
7440 status = task->tk_status;
fce5c838 7441 rpc_put_task(task);
acf82b85 7442 return 0;
fce5c838
RL		 7443out:
7444 dprintk("<-- %s status=%d\n", __func__, status);
7445 return status;
7446}
b1f69b75
AA		 7447
7448static void
7449nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7450{
7451 struct nfs4_layoutget *lgp = calldata;
c31663d4 7452 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7453 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7454
7455 dprintk("--> %s\n", __func__);
c31663d4
FI		 7456 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7457 * right now covering the LAYOUTGET we are about to send.
7458 * However, that is not so catastrophic, and there seems
7459 * to be no way to prevent it completely.
7460 */
6ba7db34 7461 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7462 &lgp->res.seq_res, task))
b1f69b75 7463 return;
cf7d63f1
FI		 7464 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7465 NFS_I(lgp->args.inode)->layout,
7466 lgp->args.ctx->state)) {
7467 rpc_exit(task, NFS4_OK);
cf7d63f1 7468 }
b1f69b75
AA		 7469}
7470
7471static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7472{
7473 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7474 struct inode *inode = lgp->args.inode;
7475 struct nfs_server *server = NFS_SERVER(inode);
7476 struct pnfs_layout_hdr *lo;
7477 struct nfs4_state *state = NULL;
ed7e5423 7478 unsigned long timeo, now, giveup;
b1f69b75 7479
ed7e5423 7480 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7481
6ba7db34 7482 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7483 goto out;
b1f69b75
AA		 7484
7485 switch (task->tk_status) {
7486 case 0:
ee314c2a 7487 goto out;
ed7e5423
BH		 7488 /*
7489 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7490 * (or clients) writing to the same RAID stripe
7491 */
b1f69b75 7492 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7493 /*
7494 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7495 * existing layout before getting a new one).
7496 */
b1f69b75 7497 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7498 timeo = rpc_get_timeout(task->tk_client);
7499 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7500 now = jiffies;
7501 if (time_after(giveup, now)) {
7502 unsigned long delay;
7503
7504 /* Delay for:
7505 * - Not less then NFS4_POLL_RETRY_MIN.
7506 * - One last time a jiffie before we give up
7507 * - exponential backoff (time_now minus start_attempt)
7508 */
7509 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7510 min((giveup - now - 1),
7511 now - lgp->args.timestamp));
7512
7513 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7514 __func__, delay);
7515 rpc_delay(task, delay);
7516 task->tk_status = 0;
7517 rpc_restart_call_prepare(task);
7518 goto out; /* Do not call nfs4_async_handle_error() */
7519 }
ee314c2a
TM		 7520 break;
7521 case -NFS4ERR_EXPIRED:
7522 case -NFS4ERR_BAD_STATEID:
7523 spin_lock(&inode->i_lock);
7524 lo = NFS_I(inode)->layout;
7525 if (!lo || list_empty(&lo->plh_segs)) {
7526 spin_unlock(&inode->i_lock);
7527 /* If the open stateid was bad, then recover it. */
7528 state = lgp->args.ctx->state;
7529 } else {
7530 LIST_HEAD(head);
7531
7532 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7533 spin_unlock(&inode->i_lock);
7534 /* Mark the bad layout state as invalid, then
7535 * retry using the open stateid. */
7536 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7537 }
7538 }
ee314c2a
TM		 7539 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7540 rpc_restart_call_prepare(task);
7541out:
b1f69b75
AA		 7542 dprintk("<-- %s\n", __func__);
7543}
7544
8554116e
IK		 7545static size_t max_response_pages(struct nfs_server *server)
7546{
7547 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7548 return nfs_page_array_len(0, max_resp_sz);
7549}
7550
7551static void nfs4_free_pages(struct page **pages, size_t size)
7552{
7553 int i;
7554
7555 if (!pages)
7556 return;
7557
7558 for (i = 0; i < size; i++) {
7559 if (!pages[i])
7560 break;
7561 __free_page(pages[i]);
7562 }
7563 kfree(pages);
7564}
7565
7566static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7567{
7568 struct page **pages;
7569 int i;
7570
7571 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7572 if (!pages) {
7573 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7574 return NULL;
7575 }
7576
7577 for (i = 0; i < size; i++) {
7578 pages[i] = alloc_page(gfp_flags);
7579 if (!pages[i]) {
7580 dprintk("%s: failed to allocate page\n", __func__);
7581 nfs4_free_pages(pages, size);
7582 return NULL;
7583 }
7584 }
7585
7586 return pages;
7587}
7588
b1f69b75
AA		 7589static void nfs4_layoutget_release(void *calldata)
7590{
7591 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7592 struct inode *inode = lgp->args.inode;
7593 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7594 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7595
7596 dprintk("--> %s\n", __func__);
8554116e 7597 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7598 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7599 put_nfs_open_context(lgp->args.ctx);
7600 kfree(calldata);
7601 dprintk("<-- %s\n", __func__);
7602}
7603
7604static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7605 .rpc_call_prepare = nfs4_layoutget_prepare,
7606 .rpc_call_done = nfs4_layoutget_done,
7607 .rpc_release = nfs4_layoutget_release,
7608};
7609
a0b0a6e3
TM		 7610struct pnfs_layout_segment *
7611nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7612{
a47970ff
WAA		 7613 struct inode *inode = lgp->args.inode;
7614 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7615 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7616 struct rpc_task *task;
7617 struct rpc_message msg = {
7618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7619 .rpc_argp = &lgp->args,
7620 .rpc_resp = &lgp->res,
6ab59344 7621 .rpc_cred = lgp->cred,
b1f69b75
AA		 7622 };
7623 struct rpc_task_setup task_setup_data = {
7624 .rpc_client = server->client,
7625 .rpc_message = &msg,
7626 .callback_ops = &nfs4_layoutget_call_ops,
7627 .callback_data = lgp,
7628 .flags = RPC_TASK_ASYNC,
7629 };
a0b0a6e3 7630 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7631 int status = 0;
7632
7633 dprintk("--> %s\n", __func__);
7634
8554116e
IK		 7635 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7636 if (!lgp->args.layout.pages) {
7637 nfs4_layoutget_release(lgp);
a0b0a6e3 7638 return ERR_PTR(-ENOMEM);
8554116e
IK		 7639 }
7640 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7641 lgp->args.timestamp = jiffies;
8554116e 7642
35124a09 7643 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7644 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7645 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7646
7647 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7648 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7649
b1f69b75
AA		 7650 task = rpc_run_task(&task_setup_data);
7651 if (IS_ERR(task))
a0b0a6e3 7652 return ERR_CAST(task);
b1f69b75 7653 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7654 if (status == 0)
7655 status = task->tk_status;
1037e6ea
TM		 7656 trace_nfs4_layoutget(lgp->args.ctx,
7657 &lgp->args.range,
7658 &lgp->res.range,
7659 status);
085b7a45
WAA		 7660 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7661 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7662 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7663 rpc_put_task(task);
7664 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7665 if (status)
7666 return ERR_PTR(status);
7667 return lseg;
b1f69b75
AA		 7668}
7669
cbe82603
BH		 7670static void
7671nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7672{
7673 struct nfs4_layoutreturn *lrp = calldata;
7674
7675 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7676 nfs41_setup_sequence(lrp->clp->cl_session,
7677 &lrp->args.seq_args,
7678 &lrp->res.seq_res,
7679 task);
cbe82603
BH		 7680}
7681
7682static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7683{
7684 struct nfs4_layoutreturn *lrp = calldata;
7685 struct nfs_server *server;
7686
7687 dprintk("--> %s\n", __func__);
7688
6ba7db34 7689 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7690 return;
7691
7692 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7693 switch (task->tk_status) {
7694 default:
7695 task->tk_status = 0;
7696 case 0:
7697 break;
7698 case -NFS4ERR_DELAY:
7699 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7700 break;
d00c5d43 7701 rpc_restart_call_prepare(task);
cbe82603
BH		 7702 return;
7703 }
cbe82603
BH		 7704 dprintk("<-- %s\n", __func__);
7705}
7706
7707static void nfs4_layoutreturn_release(void *calldata)
7708{
7709 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7710 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7711
7712 dprintk("--> %s\n", __func__);
849b286f
TM		 7713 spin_lock(&lo->plh_inode->i_lock);
7714 if (lrp->res.lrs_present)
7715 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7716 lo->plh_block_lgets--;
7717 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7718 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7719 kfree(calldata);
7720 dprintk("<-- %s\n", __func__);
7721}
7722
7723static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7724 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7725 .rpc_call_done = nfs4_layoutreturn_done,
7726 .rpc_release = nfs4_layoutreturn_release,
7727};
7728
7729int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7730{
7731 struct rpc_task *task;
7732 struct rpc_message msg = {
7733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7734 .rpc_argp = &lrp->args,
7735 .rpc_resp = &lrp->res,
9556000d 7736 .rpc_cred = lrp->cred,
cbe82603
BH		 7737 };
7738 struct rpc_task_setup task_setup_data = {
1771c577 7739 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7740 .rpc_message = &msg,
7741 .callback_ops = &nfs4_layoutreturn_call_ops,
7742 .callback_data = lrp,
7743 };
7744 int status;
7745
7746 dprintk("--> %s\n", __func__);
a9c92d6b 7747 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7748 task = rpc_run_task(&task_setup_data);
7749 if (IS_ERR(task))
7750 return PTR_ERR(task);
7751 status = task->tk_status;
1037e6ea 7752 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7753 dprintk("<-- %s status=%d\n", __func__, status);
7754 rpc_put_task(task);
7755 return status;
7756}
7757
7f11d8d3
AA		 7758/*
7759 * Retrieve the list of Data Server devices from the MDS.
7760 */
7761static int _nfs4_getdevicelist(struct nfs_server *server,
7762 const struct nfs_fh *fh,
7763 struct pnfs_devicelist *devlist)
7764{
7765 struct nfs4_getdevicelist_args args = {
7766 .fh = fh,
7767 .layoutclass = server->pnfs_curr_ld->id,
7768 };
7769 struct nfs4_getdevicelist_res res = {
7770 .devlist = devlist,
7771 };
7772 struct rpc_message msg = {
7773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7774 .rpc_argp = &args,
7775 .rpc_resp = &res,
7776 };
7777 int status;
7778
7779 dprintk("--> %s\n", __func__);
7780 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7781 &res.seq_res, 0);
7782 dprintk("<-- %s status=%d\n", __func__, status);
7783 return status;
7784}
7785
7786int nfs4_proc_getdevicelist(struct nfs_server *server,
7787 const struct nfs_fh *fh,
7788 struct pnfs_devicelist *devlist)
7789{
7790 struct nfs4_exception exception = { };
7791 int err;
7792
7793 do {
7794 err = nfs4_handle_exception(server,
7795 _nfs4_getdevicelist(server, fh, devlist),
7796 &exception);
7797 } while (exception.retry);
7798
7799 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7800 err, devlist->num_devs);
7801
7802 return err;
7803}
7804EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7805
b1f69b75 7806static int
cd5875fe
TM		 7807_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7808 struct pnfs_device *pdev,
7809 struct rpc_cred *cred)
b1f69b75
AA		 7810{
7811 struct nfs4_getdeviceinfo_args args = {
7812 .pdev = pdev,
7813 };
7814 struct nfs4_getdeviceinfo_res res = {
7815 .pdev = pdev,
7816 };
7817 struct rpc_message msg = {
7818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7819 .rpc_argp = &args,
7820 .rpc_resp = &res,
cd5875fe 7821 .rpc_cred = cred,
b1f69b75
AA		 7822 };
7823 int status;
7824
7825 dprintk("--> %s\n", __func__);
7c513058 7826 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7827 dprintk("<-- %s status=%d\n", __func__, status);
7828
7829 return status;
7830}
7831
cd5875fe
TM		 7832int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7833 struct pnfs_device *pdev,
7834 struct rpc_cred *cred)
b1f69b75
AA		 7835{
7836 struct nfs4_exception exception = { };
7837 int err;
7838
7839 do {
7840 err = nfs4_handle_exception(server,
cd5875fe 7841 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7842 &exception);
7843 } while (exception.retry);
7844 return err;
7845}
7846EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7847
863a3c6c
AA		 7848static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7849{
7850 struct nfs4_layoutcommit_data *data = calldata;
7851 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7852 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7853
d9afbd1b
TM		 7854 nfs41_setup_sequence(session,
7855 &data->args.seq_args,
7856 &data->res.seq_res,
7857 task);
863a3c6c
AA		 7858}
7859
7860static void
7861nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7862{
7863 struct nfs4_layoutcommit_data *data = calldata;
7864 struct nfs_server *server = NFS_SERVER(data->args.inode);
7865
6ba7db34 7866 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7867 return;
7868
7869 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7870 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7871 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7872 case -NFS4ERR_BADLAYOUT: /* no layout */
7873 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7874 task->tk_status = 0;
e59d27e0 7875 case 0:
e59d27e0
TM		 7876 break;
7877 default:
7878 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7879 rpc_restart_call_prepare(task);
7880 return;
7881 }
7882 }
863a3c6c
AA		 7883}
7884
7885static void nfs4_layoutcommit_release(void *calldata)
7886{
7887 struct nfs4_layoutcommit_data *data = calldata;
7888
db29c089 7889 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7890 nfs_post_op_update_inode_force_wcc(data->args.inode,
7891 data->res.fattr);
863a3c6c
AA		 7892 put_rpccred(data->cred);
7893 kfree(data);
7894}
7895
7896static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7897 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7898 .rpc_call_done = nfs4_layoutcommit_done,
7899 .rpc_release = nfs4_layoutcommit_release,
7900};
7901
7902int
ef311537 7903nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7904{
7905 struct rpc_message msg = {
7906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7907 .rpc_argp = &data->args,
7908 .rpc_resp = &data->res,
7909 .rpc_cred = data->cred,
7910 };
7911 struct rpc_task_setup task_setup_data = {
7912 .task = &data->task,
7913 .rpc_client = NFS_CLIENT(data->args.inode),
7914 .rpc_message = &msg,
7915 .callback_ops = &nfs4_layoutcommit_ops,
7916 .callback_data = data,
7917 .flags = RPC_TASK_ASYNC,
7918 };
7919 struct rpc_task *task;
7920 int status = 0;
7921
7922 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7923 "lbw: %llu inode %lu\n",
7924 data->task.tk_pid, sync,
7925 data->args.lastbytewritten,
7926 data->args.inode->i_ino);
7927
a9c92d6b 7928 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7929 task = rpc_run_task(&task_setup_data);
7930 if (IS_ERR(task))
7931 return PTR_ERR(task);
ef311537 7932 if (sync == false)
863a3c6c
AA		 7933 goto out;
7934 status = nfs4_wait_for_completion_rpc_task(task);
7935 if (status != 0)
7936 goto out;
7937 status = task->tk_status;
1037e6ea 7938 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7939out:
7940 dprintk("%s: status %d\n", __func__, status);
7941 rpc_put_task(task);
7942 return status;
7943}
fca78d6d 7944
97431204
AA		 7945/**
7946 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7947 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7948 */
fca78d6d
BS		 7949static int
7950_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7951 struct nfs_fsinfo *info,
7952 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7953{
7954 struct nfs41_secinfo_no_name_args args = {
7955 .style = SECINFO_STYLE_CURRENT_FH,
7956 };
7957 struct nfs4_secinfo_res res = {
7958 .flavors = flavors,
7959 };
7960 struct rpc_message msg = {
7961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7962 .rpc_argp = &args,
7963 .rpc_resp = &res,
7964 };
b1b3e136 7965 struct rpc_clnt *clnt = server->client;
7cb852df 7966 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7967 int status;
7968
7969 if (use_integrity) {
7970 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7971 cred = nfs4_get_clid_cred(server->nfs_client);
7972 msg.rpc_cred = cred;
b1b3e136
WAA		 7973 }
7974
7975 dprintk("--> %s\n", __func__);
7976 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7977 &res.seq_res, 0);
7978 dprintk("<-- %s status=%d\n", __func__, status);
7979
7cb852df
WAA		 7980 if (cred)
7981 put_rpccred(cred);
b1b3e136
WAA		 7982
7983 return status;
fca78d6d
BS		 7984}
7985
7986static int
7987nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7988 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7989{
7990 struct nfs4_exception exception = { };
7991 int err;
7992 do {
b1b3e136
WAA		 7993 /* first try using integrity protection */
7994 err = -NFS4ERR_WRONGSEC;
7995
7996 /* try to use integrity protection with machine cred */
7997 if (_nfs4_is_integrity_protected(server->nfs_client))
7998 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7999 flavors, true);
8000
8001 /*
8002 * if unable to use integrity protection, or SECINFO with
8003 * integrity protection returns NFS4ERR_WRONGSEC (which is
8004 * disallowed by spec, but exists in deployed servers) use
8005 * the current filesystem's rpc_client and the user cred.
8006 */
8007 if (err == -NFS4ERR_WRONGSEC)
8008 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8009 flavors, false);
8010
fca78d6d
BS		 8011 switch (err) {
8012 case 0:
8013 case -NFS4ERR_WRONGSEC:
78b19bae 8014 case -ENOTSUPP:
05e9cfb4 8015 goto out;
fca78d6d
BS		 8016 default:
8017 err = nfs4_handle_exception(server, err, &exception);
8018 }
8019 } while (exception.retry);
05e9cfb4 8020out:
fca78d6d
BS		 8021 return err;
8022}
8023
8024static int
8025nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8026 struct nfs_fsinfo *info)
8027{
8028 int err;
8029 struct page *page;
367156d9 8030 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8031 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8032 struct nfs4_secinfo4 *secinfo;
8033 int i;
fca78d6d
BS		 8034
8035 page = alloc_page(GFP_KERNEL);
8036 if (!page) {
8037 err = -ENOMEM;
8038 goto out;
8039 }
8040
8041 flavors = page_address(page);
8042 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8043
8044 /*
8045 * Fall back on "guess and check" method if
8046 * the server doesn't support SECINFO_NO_NAME
8047 */
78b19bae 8048 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8049 err = nfs4_find_root_sec(server, fhandle, info);
8050 goto out_freepage;
8051 }
8052 if (err)
8053 goto out_freepage;
8054
58a8cf12
WAA		 8055 for (i = 0; i < flavors->num_flavors; i++) {
8056 secinfo = &flavors->flavors[i];
8057
8058 switch (secinfo->flavor) {
8059 case RPC_AUTH_NULL:
8060 case RPC_AUTH_UNIX:
8061 case RPC_AUTH_GSS:
8062 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8063 &secinfo->flavor_info);
8064 break;
8065 default:
8066 flavor = RPC_AUTH_MAXFLAVOR;
8067 break;
8068 }
8069
4d4b69dd
WAA		 8070 if (!nfs_auth_info_match(&server->auth_info, flavor))
8071 flavor = RPC_AUTH_MAXFLAVOR;
8072
58a8cf12
WAA		 8073 if (flavor != RPC_AUTH_MAXFLAVOR) {
8074 err = nfs4_lookup_root_sec(server, fhandle,
8075 info, flavor);
8076 if (!err)
8077 break;
8078 }
8079 }
8080
8081 if (flavor == RPC_AUTH_MAXFLAVOR)
8082 err = -EPERM;
fca78d6d
BS		 8083
8084out_freepage:
8085 put_page(page);
8086 if (err == -EACCES)
8087 return -EPERM;
8088out:
8089 return err;
8090}
1cab0652 8091
ab7cb0df
TM		 8092static int _nfs41_test_stateid(struct nfs_server *server,
8093 nfs4_stateid *stateid,
8094 struct rpc_cred *cred)
7d974794
BS		 8095{
8096 int status;
8097 struct nfs41_test_stateid_args args = {
1cab0652 8098 .stateid = stateid,
7d974794
BS		 8099 };
8100 struct nfs41_test_stateid_res res;
8101 struct rpc_message msg = {
8102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8103 .rpc_argp = &args,
8104 .rpc_resp = &res,
ab7cb0df 8105 .rpc_cred = cred,
7d974794 8106 };
3787d506
WAA		 8107 struct rpc_clnt *rpc_client = server->client;
8108
8109 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8110 &rpc_client, &msg);
1cab0652 8111
38527b15 8112 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8113 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8114 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8115 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8116 &args.seq_args, &res.seq_res);
38527b15
CL		 8117 if (status != NFS_OK) {
8118 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8119 return status;
38527b15
CL		 8120 }
8121 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8122 return -res.status;
7d974794
BS		 8123}
8124
38527b15
CL		 8125/**
8126 * nfs41_test_stateid - perform a TEST_STATEID operation
8127 *
8128 * @server: server / transport on which to perform the operation
8129 * @stateid: state ID to test
ab7cb0df 8130 * @cred: credential
38527b15
CL		 8131 *
8132 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8133 * Otherwise a negative NFS4ERR value is returned if the operation
8134 * failed or the state ID is not currently valid.
8135 */
ab7cb0df
TM		 8136static int nfs41_test_stateid(struct nfs_server *server,
8137 nfs4_stateid *stateid,
8138 struct rpc_cred *cred)
7d974794
BS		 8139{
8140 struct nfs4_exception exception = { };
8141 int err;
8142 do {
ab7cb0df 8143 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8144 if (err != -NFS4ERR_DELAY)
8145 break;
8146 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8147 } while (exception.retry);
8148 return err;
8149}
9aeda35f 8150
7c1d5fae
TM		 8151struct nfs_free_stateid_data {
8152 struct nfs_server *server;
8153 struct nfs41_free_stateid_args args;
9aeda35f 8154 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8155};
8156
8157static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8158{
8159 struct nfs_free_stateid_data *data = calldata;
8160 nfs41_setup_sequence(nfs4_get_session(data->server),
8161 &data->args.seq_args,
8162 &data->res.seq_res,
8163 task);
8164}
8165
8166static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8167{
8168 struct nfs_free_stateid_data *data = calldata;
8169
8170 nfs41_sequence_done(task, &data->res.seq_res);
8171
8172 switch (task->tk_status) {
8173 case -NFS4ERR_DELAY:
8174 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8175 rpc_restart_call_prepare(task);
8176 }
8177}
8178
8179static void nfs41_free_stateid_release(void *calldata)
8180{
8181 kfree(calldata);
8182}
8183
17f26b12 8184static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8185 .rpc_call_prepare = nfs41_free_stateid_prepare,
8186 .rpc_call_done = nfs41_free_stateid_done,
8187 .rpc_release = nfs41_free_stateid_release,
8188};
8189
8190static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8191 nfs4_stateid *stateid,
ab7cb0df 8192 struct rpc_cred *cred,
7c1d5fae
TM		 8193 bool privileged)
8194{
9aeda35f
BS		 8195 struct rpc_message msg = {
8196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8197 .rpc_cred = cred,
9aeda35f 8198 };
7c1d5fae
TM		 8199 struct rpc_task_setup task_setup = {
8200 .rpc_client = server->client,
8201 .rpc_message = &msg,
8202 .callback_ops = &nfs41_free_stateid_ops,
8203 .flags = RPC_TASK_ASYNC,
8204 };
8205 struct nfs_free_stateid_data *data;
9aeda35f 8206
3787d506
WAA		 8207 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8208 &task_setup.rpc_client, &msg);
8209
38527b15 8210 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8211 data = kmalloc(sizeof(*data), GFP_NOFS);
8212 if (!data)
8213 return ERR_PTR(-ENOMEM);
8214 data->server = server;
8215 nfs4_stateid_copy(&data->args.stateid, stateid);
8216
8217 task_setup.callback_data = data;
8218
8219 msg.rpc_argp = &data->args;
8220 msg.rpc_resp = &data->res;
a9c92d6b 8221 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8222 if (privileged)
8223 nfs4_set_sequence_privileged(&data->args.seq_args);
8224
8225 return rpc_run_task(&task_setup);
9aeda35f
BS		 8226}
8227
38527b15
CL		 8228/**
8229 * nfs41_free_stateid - perform a FREE_STATEID operation
8230 *
8231 * @server: server / transport on which to perform the operation
8232 * @stateid: state ID to release
ab7cb0df 8233 * @cred: credential
38527b15
CL		 8234 *
8235 * Returns NFS_OK if the server freed "stateid". Otherwise a
8236 * negative NFS4ERR value is returned.
8237 */
ab7cb0df
TM		 8238static int nfs41_free_stateid(struct nfs_server *server,
8239 nfs4_stateid *stateid,
8240 struct rpc_cred *cred)
9aeda35f 8241{
7c1d5fae
TM		 8242 struct rpc_task *task;
8243 int ret;
8244
ab7cb0df 8245 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8246 if (IS_ERR(task))
8247 return PTR_ERR(task);
8248 ret = rpc_wait_for_completion_task(task);
8249 if (!ret)
8250 ret = task->tk_status;
8251 rpc_put_task(task);
8252 return ret;
9aeda35f 8253}
36281caa 8254
f1cdae87
JL		 8255static void
8256nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8257{
8258 struct rpc_task *task;
ab7cb0df 8259 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8260
ab7cb0df 8261 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8262 nfs4_free_lock_state(server, lsp);
8263 if (IS_ERR(task))
f1cdae87 8264 return;
c8b2d0bf 8265 rpc_put_task(task);
c8b2d0bf
TM		 8266}
8267
36281caa
TM		 8268static bool nfs41_match_stateid(const nfs4_stateid *s1,
8269 const nfs4_stateid *s2)
8270{
2d2f24ad 8271 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8272 return false;
8273
2d2f24ad 8274 if (s1->seqid == s2->seqid)
36281caa 8275 return true;
2d2f24ad 8276 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8277 return true;
8278
8279 return false;
8280}
8281
557134a3
AA		 8282#endif /* CONFIG_NFS_V4_1 */
8283
36281caa
TM		 8284static bool nfs4_match_stateid(const nfs4_stateid *s1,
8285 const nfs4_stateid *s2)
8286{
f597c537 8287 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8288}
8289
8290
17280175 8291static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8292 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8293 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8294 .recover_open = nfs4_open_reclaim,
8295 .recover_lock = nfs4_lock_reclaim,
591d71cb 8296 .establish_clid = nfs4_init_clientid,
05f4c350 8297 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8298};
8299
591d71cb 8300#if defined(CONFIG_NFS_V4_1)
17280175 8301static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8302 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8303 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8304 .recover_open = nfs4_open_reclaim,
8305 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8306 .establish_clid = nfs41_init_clientid,
fce5c838 8307 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8308 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8309};
8310#endif /* CONFIG_NFS_V4_1 */
8311
17280175 8312static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8313 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8314 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8315 .recover_open = nfs4_open_expired,
8316 .recover_lock = nfs4_lock_expired,
8317 .establish_clid = nfs4_init_clientid,
8318};
8319
8320#if defined(CONFIG_NFS_V4_1)
17280175 8321static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8322 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8323 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8324 .recover_open = nfs41_open_expired,
8325 .recover_lock = nfs41_lock_expired,
4d643d1d 8326 .establish_clid = nfs41_init_clientid,
1da177e4 8327};
591d71cb 8328#endif /* CONFIG_NFS_V4_1 */
1da177e4 8329
17280175 8330static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8331 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8332 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8333 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8334};
8335
8336#if defined(CONFIG_NFS_V4_1)
17280175 8337static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8338 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8339 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8340 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8341};
8342#endif
8343
ec011fe8 8344static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8345 .get_locations = _nfs40_proc_get_locations,
44c99933 8346 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8347};
8348
8349#if defined(CONFIG_NFS_V4_1)
8350static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8351 .get_locations = _nfs41_proc_get_locations,
44c99933 8352 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8353};
8354#endif /* CONFIG_NFS_V4_1 */
8355
97dc1359
TM		 8356static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8357 .minor_version = 0,
39c6daae
TM		 8358 .init_caps = NFS_CAP_READDIRPLUS
8359 | NFS_CAP_ATOMIC_OPEN
8360 | NFS_CAP_CHANGE_ATTR
8361 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8362 .init_client = nfs40_init_client,
8363 .shutdown_client = nfs40_shutdown_client,
36281caa 8364 .match_stateid = nfs4_match_stateid,
fca78d6d 8365 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8366 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8367 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8368 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8369 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8370 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8371 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8372};
8373
8374#if defined(CONFIG_NFS_V4_1)
8375static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8376 .minor_version = 1,
39c6daae
TM		 8377 .init_caps = NFS_CAP_READDIRPLUS
8378 | NFS_CAP_ATOMIC_OPEN
8379 | NFS_CAP_CHANGE_ATTR
3b66486c 8380 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8381 | NFS_CAP_STATEID_NFSV41
8382 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8383 .init_client = nfs41_init_client,
8384 .shutdown_client = nfs41_shutdown_client,
36281caa 8385 .match_stateid = nfs41_match_stateid,
fca78d6d 8386 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8387 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8388 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8389 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8390 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8391 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8392 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8393};
8394#endif
8395
42c2c424
SD		 8396#if defined(CONFIG_NFS_V4_2)
8397static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8398 .minor_version = 2,
7017310a
BS		 8399 .init_caps = NFS_CAP_READDIRPLUS
8400 | NFS_CAP_ATOMIC_OPEN
8401 | NFS_CAP_CHANGE_ATTR
8402 | NFS_CAP_POSIX_LOCK
8403 | NFS_CAP_STATEID_NFSV41
8404 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8405 .init_client = nfs41_init_client,
8406 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8407 .match_stateid = nfs41_match_stateid,
8408 .find_root_sec = nfs41_find_root_sec,
7017310a 8409 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8410 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8411 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8412 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8413 .state_renewal_ops = &nfs41_state_renewal_ops,
8414};
8415#endif
8416
97dc1359
TM		 8417const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8418 [0] = &nfs_v4_0_minor_ops,
8419#if defined(CONFIG_NFS_V4_1)
8420 [1] = &nfs_v4_1_minor_ops,
8421#endif
42c2c424
SD		 8422#if defined(CONFIG_NFS_V4_2)
8423 [2] = &nfs_v4_2_minor_ops,
8424#endif
97dc1359
TM		 8425};
8426
17f26b12 8427static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8428 .create = nfs_create,
8429 .lookup = nfs_lookup,
8430 .atomic_open = nfs_atomic_open,
8431 .link = nfs_link,
8432 .unlink = nfs_unlink,
8433 .symlink = nfs_symlink,
8434 .mkdir = nfs_mkdir,
8435 .rmdir = nfs_rmdir,
8436 .mknod = nfs_mknod,
8437 .rename = nfs_rename,
8438 .permission = nfs_permission,
8439 .getattr = nfs_getattr,
8440 .setattr = nfs_setattr,
8441 .getxattr = generic_getxattr,
8442 .setxattr = generic_setxattr,
8443 .listxattr = generic_listxattr,
8444 .removexattr = generic_removexattr,
8445};
8446
92e1d5be 8447static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8448 .permission = nfs_permission,
8449 .getattr = nfs_getattr,
8450 .setattr = nfs_setattr,
64c2ce8b
AK		 8451 .getxattr = generic_getxattr,
8452 .setxattr = generic_setxattr,
8453 .listxattr = generic_listxattr,
8454 .removexattr = generic_removexattr,
6b3b5496
BF		 8455};
8456
509de811 8457const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8458 .version = 4, /* protocol version */
8459 .dentry_ops = &nfs4_dentry_operations,
8460 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8461 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8462 .file_ops = &nfs4_file_operations,
1da177e4 8463 .getroot = nfs4_proc_get_root,
281cad46 8464 .submount = nfs4_submount,
ff9099f2 8465 .try_mount = nfs4_try_mount,
1da177e4
LT		 8466 .getattr = nfs4_proc_getattr,
8467 .setattr = nfs4_proc_setattr,
8468 .lookup = nfs4_proc_lookup,
8469 .access = nfs4_proc_access,
8470 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8471 .create = nfs4_proc_create,
8472 .remove = nfs4_proc_remove,
8473 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8474 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8475 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8476 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8477 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8478 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8479 .link = nfs4_proc_link,
8480 .symlink = nfs4_proc_symlink,
8481 .mkdir = nfs4_proc_mkdir,
8482 .rmdir = nfs4_proc_remove,
8483 .readdir = nfs4_proc_readdir,
8484 .mknod = nfs4_proc_mknod,
8485 .statfs = nfs4_proc_statfs,
8486 .fsinfo = nfs4_proc_fsinfo,
8487 .pathconf = nfs4_proc_pathconf,
e9326dca 8488 .set_capabilities = nfs4_server_capabilities,
1da177e4 8489 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8490 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8491 .read_setup = nfs4_proc_read_setup,
ec06c096 8492 .read_done = nfs4_read_done,
1da177e4 8493 .write_setup = nfs4_proc_write_setup,
788e7a89 8494 .write_done = nfs4_write_done,
1da177e4 8495 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8496 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8497 .commit_done = nfs4_commit_done,
1da177e4 8498 .lock = nfs4_proc_lock,
e50a1c2e 8499 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8500 .close_context = nfs4_close_context,
2b484297 8501 .open_context = nfs4_atomic_open,
011e2a7f 8502 .have_delegation = nfs4_have_delegation,
57ec14c5 8503 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8504 .alloc_client = nfs4_alloc_client,
45a52a02 8505 .init_client = nfs4_init_client,
cdb7eced 8506 .free_client = nfs4_free_client,
1179acc6
BS		 8507 .create_server = nfs4_create_server,
8508 .clone_server = nfs_clone_server,
1da177e4
LT		 8509};
8510
64c2ce8b
AK		 8511static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8512 .prefix = XATTR_NAME_NFSV4_ACL,
8513 .list = nfs4_xattr_list_nfs4_acl,
8514 .get = nfs4_xattr_get_nfs4_acl,
8515 .set = nfs4_xattr_set_nfs4_acl,
8516};
8517
8518const struct xattr_handler *nfs4_xattr_handlers[] = {
8519 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8520#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8521 &nfs4_xattr_nfs4_label_handler,
8522#endif
64c2ce8b
AK		 8523 NULL
8524};
8525
1da177e4
LT		 8526/*
8527 * Local variables:
8528 * c-basic-offset: 8
8529 * End:
8530 */
Linux 6.x block layer and io_uring tree(s)