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NFSv4: Deal with a sparse warning in nfs4_opendata_alloc
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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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>
39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
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>
50#include <linux/nfs_mount.h>
51#include <linux/namei.h>
52#include <linux/mount.h>
53#include <linux/module.h>
54#include <linux/nfs_idmap.h>
55#include <linux/xattr.h>
56#include <linux/utsname.h>
57#include <linux/freezer.h>
58
59#include "nfs4_fs.h"
60#include "delegation.h"
61#include "internal.h"
62#include "iostat.h"
63#include "callback.h"
64#include "pnfs.h"
65#include "netns.h"
66#include "nfs4session.h"
67#include "fscache.h"
68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
71#define NFS4_POLL_RETRY_MIN (HZ/10)
72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
74struct nfs4_opendata;
75static int _nfs4_proc_open(struct nfs4_opendata *data);
76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state, struct nfs4_label *ilabel,
85 struct nfs4_label *olabel);
86#ifdef CONFIG_NFS_V4_1
87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
88 struct rpc_cred *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91#endif
92
93#ifdef CONFIG_NFS_V4_SECURITY_LABEL
94static inline struct nfs4_label *
95nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
96 struct iattr *sattr, struct nfs4_label *label)
97{
98 int err;
99
100 if (label == NULL)
101 return NULL;
102
103 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
104 return NULL;
105
106 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
107 return NULL;
108
109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
142/* Prevent leaks of NFSv4 errors into userland */
143static int nfs4_map_errors(int err)
144{
145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
151 return -EREMOTEIO;
152 case -NFS4ERR_WRONGSEC:
153 return -EPERM;
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_ACCESS:
162 return -EACCES;
163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
165 default:
166 dprintk("%s could not handle NFSv4 error %d\n",
167 __func__, -err);
168 break;
169 }
170 return -EIO;
171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
176const u32 nfs4_fattr_bitmap[3] = {
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
190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
194};
195
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
214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
220const u32 nfs4_statfs_bitmap[3] = {
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
229const u32 nfs4_pathconf_bitmap[3] = {
230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
239 FATTR4_WORD1_TIME_DELTA
240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
242};
243
244const u32 nfs4_fs_locations_bitmap[3] = {
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
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
261};
262
263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
265{
266 __be32 *start, *p;
267
268 if (cookie > 2) {
269 readdir->cookie = cookie;
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 */
286 start = p = kmap_atomic(*readdir->pages);
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 */
298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
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 */
310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
315}
316
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;
327 freezable_schedule_timeout_killable_unsafe(*timeout);
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 */
337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
338{
339 struct nfs_client *clp = server->nfs_client;
340 struct nfs4_state *state = exception->state;
341 struct inode *inode = exception->inode;
342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
348 case -NFS4ERR_OPENMODE:
349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
350 nfs4_inode_return_delegation(inode);
351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
359 goto wait_on_recovery;
360 case -NFS4ERR_DELEG_REVOKED:
361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
368 if (state == NULL)
369 break;
370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
373 goto wait_on_recovery;
374 case -NFS4ERR_EXPIRED:
375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
380 case -NFS4ERR_STALE_STATEID:
381 case -NFS4ERR_STALE_CLIENTID:
382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
384#if defined(CONFIG_NFS_V4_1)
385 case -NFS4ERR_BADSESSION:
386 case -NFS4ERR_BADSLOT:
387 case -NFS4ERR_BAD_HIGH_SLOT:
388 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
389 case -NFS4ERR_DEADSESSION:
390 case -NFS4ERR_SEQ_FALSE_RETRY:
391 case -NFS4ERR_SEQ_MISORDERED:
392 dprintk("%s ERROR: %d Reset session\n", __func__,
393 errorcode);
394 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
395 goto wait_on_recovery;
396#endif /* defined(CONFIG_NFS_V4_1) */
397 case -NFS4ERR_FILE_OPEN:
398 if (exception->timeout > HZ) {
399 /* We have retried a decent amount, time to
400 * fail
401 */
402 ret = -EBUSY;
403 break;
404 }
405 case -NFS4ERR_GRACE:
406 case -NFS4ERR_DELAY:
407 ret = nfs4_delay(server->client, &exception->timeout);
408 if (ret != 0)
409 break;
410 case -NFS4ERR_RETRY_UNCACHED_REP:
411 case -NFS4ERR_OLD_STATEID:
412 exception->retry = 1;
413 break;
414 case -NFS4ERR_BADOWNER:
415 /* The following works around a Linux server bug! */
416 case -NFS4ERR_BADNAME:
417 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
418 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
419 exception->retry = 1;
420 printk(KERN_WARNING "NFS: v4 server %s "
421 "does not accept raw "
422 "uid/gids. "
423 "Reenabling the idmapper.\n",
424 server->nfs_client->cl_hostname);
425 }
426 }
427 /* We failed to handle the error */
428 return nfs4_map_errors(ret);
429wait_on_recovery:
430 ret = nfs4_wait_clnt_recover(clp);
431 if (ret == 0)
432 exception->retry = 1;
433 return ret;
434}
435
436
437static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
438{
439 spin_lock(&clp->cl_lock);
440 if (time_before(clp->cl_last_renewal,timestamp))
441 clp->cl_last_renewal = timestamp;
442 spin_unlock(&clp->cl_lock);
443}
444
445static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
446{
447 do_renew_lease(server->nfs_client, timestamp);
448}
449
450#if defined(CONFIG_NFS_V4_1)
451
452static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
453{
454 struct nfs4_session *session;
455 struct nfs4_slot_table *tbl;
456 bool send_new_highest_used_slotid = false;
457
458 if (!res->sr_slot) {
459 /* just wake up the next guy waiting since
460 * we may have not consumed a slot after all */
461 dprintk("%s: No slot\n", __func__);
462 return;
463 }
464 tbl = res->sr_slot->table;
465 session = tbl->session;
466
467 spin_lock(&tbl->slot_tbl_lock);
468 /* Be nice to the server: try to ensure that the last transmitted
469 * value for highest_user_slotid <= target_highest_slotid
470 */
471 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
472 send_new_highest_used_slotid = true;
473
474 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
475 send_new_highest_used_slotid = false;
476 goto out_unlock;
477 }
478 nfs4_free_slot(tbl, res->sr_slot);
479
480 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
481 send_new_highest_used_slotid = false;
482out_unlock:
483 spin_unlock(&tbl->slot_tbl_lock);
484 res->sr_slot = NULL;
485 if (send_new_highest_used_slotid)
486 nfs41_server_notify_highest_slotid_update(session->clp);
487}
488
489static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
490{
491 struct nfs4_session *session;
492 struct nfs4_slot *slot;
493 struct nfs_client *clp;
494 bool interrupted = false;
495 int ret = 1;
496
497 /* don't increment the sequence number if the task wasn't sent */
498 if (!RPC_WAS_SENT(task))
499 goto out;
500
501 slot = res->sr_slot;
502 session = slot->table->session;
503
504 if (slot->interrupted) {
505 slot->interrupted = 0;
506 interrupted = true;
507 }
508
509 /* Check the SEQUENCE operation status */
510 switch (res->sr_status) {
511 case 0:
512 /* Update the slot's sequence and clientid lease timer */
513 ++slot->seq_nr;
514 clp = session->clp;
515 do_renew_lease(clp, res->sr_timestamp);
516 /* Check sequence flags */
517 if (res->sr_status_flags != 0)
518 nfs4_schedule_lease_recovery(clp);
519 nfs41_update_target_slotid(slot->table, slot, res);
520 break;
521 case 1:
522 /*
523 * sr_status remains 1 if an RPC level error occurred.
524 * The server may or may not have processed the sequence
525 * operation..
526 * Mark the slot as having hosted an interrupted RPC call.
527 */
528 slot->interrupted = 1;
529 goto out;
530 case -NFS4ERR_DELAY:
531 /* The server detected a resend of the RPC call and
532 * returned NFS4ERR_DELAY as per Section 2.10.6.2
533 * of RFC5661.
534 */
535 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
536 __func__,
537 slot->slot_nr,
538 slot->seq_nr);
539 goto out_retry;
540 case -NFS4ERR_BADSLOT:
541 /*
542 * The slot id we used was probably retired. Try again
543 * using a different slot id.
544 */
545 goto retry_nowait;
546 case -NFS4ERR_SEQ_MISORDERED:
547 /*
548 * Was the last operation on this sequence interrupted?
549 * If so, retry after bumping the sequence number.
550 */
551 if (interrupted) {
552 ++slot->seq_nr;
553 goto retry_nowait;
554 }
555 /*
556 * Could this slot have been previously retired?
557 * If so, then the server may be expecting seq_nr = 1!
558 */
559 if (slot->seq_nr != 1) {
560 slot->seq_nr = 1;
561 goto retry_nowait;
562 }
563 break;
564 case -NFS4ERR_SEQ_FALSE_RETRY:
565 ++slot->seq_nr;
566 goto retry_nowait;
567 default:
568 /* Just update the slot sequence no. */
569 ++slot->seq_nr;
570 }
571out:
572 /* The session may be reset by one of the error handlers. */
573 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
574 nfs41_sequence_free_slot(res);
575 return ret;
576retry_nowait:
577 if (rpc_restart_call_prepare(task)) {
578 task->tk_status = 0;
579 ret = 0;
580 }
581 goto out;
582out_retry:
583 if (!rpc_restart_call(task))
584 goto out;
585 rpc_delay(task, NFS4_POLL_RETRY_MAX);
586 return 0;
587}
588
589static int nfs4_sequence_done(struct rpc_task *task,
590 struct nfs4_sequence_res *res)
591{
592 if (res->sr_slot == NULL)
593 return 1;
594 return nfs41_sequence_done(task, res);
595}
596
597static void nfs41_init_sequence(struct nfs4_sequence_args *args,
598 struct nfs4_sequence_res *res, int cache_reply)
599{
600 args->sa_slot = NULL;
601 args->sa_cache_this = 0;
602 args->sa_privileged = 0;
603 if (cache_reply)
604 args->sa_cache_this = 1;
605 res->sr_slot = NULL;
606}
607
608static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
609{
610 args->sa_privileged = 1;
611}
612
613int nfs41_setup_sequence(struct nfs4_session *session,
614 struct nfs4_sequence_args *args,
615 struct nfs4_sequence_res *res,
616 struct rpc_task *task)
617{
618 struct nfs4_slot *slot;
619 struct nfs4_slot_table *tbl;
620
621 dprintk("--> %s\n", __func__);
622 /* slot already allocated? */
623 if (res->sr_slot != NULL)
624 goto out_success;
625
626 tbl = &session->fc_slot_table;
627
628 task->tk_timeout = 0;
629
630 spin_lock(&tbl->slot_tbl_lock);
631 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
632 !args->sa_privileged) {
633 /* The state manager will wait until the slot table is empty */
634 dprintk("%s session is draining\n", __func__);
635 goto out_sleep;
636 }
637
638 slot = nfs4_alloc_slot(tbl);
639 if (IS_ERR(slot)) {
640 /* If out of memory, try again in 1/4 second */
641 if (slot == ERR_PTR(-ENOMEM))
642 task->tk_timeout = HZ >> 2;
643 dprintk("<-- %s: no free slots\n", __func__);
644 goto out_sleep;
645 }
646 spin_unlock(&tbl->slot_tbl_lock);
647
648 args->sa_slot = slot;
649
650 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
651 slot->slot_nr, slot->seq_nr);
652
653 res->sr_slot = slot;
654 res->sr_timestamp = jiffies;
655 res->sr_status_flags = 0;
656 /*
657 * sr_status is only set in decode_sequence, and so will remain
658 * set to 1 if an rpc level failure occurs.
659 */
660 res->sr_status = 1;
661out_success:
662 rpc_call_start(task);
663 return 0;
664out_sleep:
665 /* Privileged tasks are queued with top priority */
666 if (args->sa_privileged)
667 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
668 NULL, RPC_PRIORITY_PRIVILEGED);
669 else
670 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
671 spin_unlock(&tbl->slot_tbl_lock);
672 return -EAGAIN;
673}
674EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
675
676int nfs4_setup_sequence(const struct nfs_server *server,
677 struct nfs4_sequence_args *args,
678 struct nfs4_sequence_res *res,
679 struct rpc_task *task)
680{
681 struct nfs4_session *session = nfs4_get_session(server);
682 int ret = 0;
683
684 if (session == NULL) {
685 rpc_call_start(task);
686 goto out;
687 }
688
689 dprintk("--> %s clp %p session %p sr_slot %d\n",
690 __func__, session->clp, session, res->sr_slot ?
691 res->sr_slot->slot_nr : -1);
692
693 ret = nfs41_setup_sequence(session, args, res, task);
694out:
695 dprintk("<-- %s status=%d\n", __func__, ret);
696 return ret;
697}
698
699struct nfs41_call_sync_data {
700 const struct nfs_server *seq_server;
701 struct nfs4_sequence_args *seq_args;
702 struct nfs4_sequence_res *seq_res;
703};
704
705static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
706{
707 struct nfs41_call_sync_data *data = calldata;
708 struct nfs4_session *session = nfs4_get_session(data->seq_server);
709
710 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
711
712 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
713}
714
715static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
716{
717 struct nfs41_call_sync_data *data = calldata;
718
719 nfs41_sequence_done(task, data->seq_res);
720}
721
722static const struct rpc_call_ops nfs41_call_sync_ops = {
723 .rpc_call_prepare = nfs41_call_sync_prepare,
724 .rpc_call_done = nfs41_call_sync_done,
725};
726
727static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
728 struct nfs_server *server,
729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res)
732{
733 int ret;
734 struct rpc_task *task;
735 struct nfs41_call_sync_data data = {
736 .seq_server = server,
737 .seq_args = args,
738 .seq_res = res,
739 };
740 struct rpc_task_setup task_setup = {
741 .rpc_client = clnt,
742 .rpc_message = msg,
743 .callback_ops = &nfs41_call_sync_ops,
744 .callback_data = &data
745 };
746
747 task = rpc_run_task(&task_setup);
748 if (IS_ERR(task))
749 ret = PTR_ERR(task);
750 else {
751 ret = task->tk_status;
752 rpc_put_task(task);
753 }
754 return ret;
755}
756
757#else
758static
759void nfs41_init_sequence(struct nfs4_sequence_args *args,
760 struct nfs4_sequence_res *res, int cache_reply)
761{
762}
763
764static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
765{
766}
767
768
769static int nfs4_sequence_done(struct rpc_task *task,
770 struct nfs4_sequence_res *res)
771{
772 return 1;
773}
774#endif /* CONFIG_NFS_V4_1 */
775
776static
777int _nfs4_call_sync(struct rpc_clnt *clnt,
778 struct nfs_server *server,
779 struct rpc_message *msg,
780 struct nfs4_sequence_args *args,
781 struct nfs4_sequence_res *res)
782{
783 return rpc_call_sync(clnt, msg, 0);
784}
785
786static
787int nfs4_call_sync(struct rpc_clnt *clnt,
788 struct nfs_server *server,
789 struct rpc_message *msg,
790 struct nfs4_sequence_args *args,
791 struct nfs4_sequence_res *res,
792 int cache_reply)
793{
794 nfs41_init_sequence(args, res, cache_reply);
795 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
796 args, res);
797}
798
799static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
800{
801 struct nfs_inode *nfsi = NFS_I(dir);
802
803 spin_lock(&dir->i_lock);
804 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
805 if (!cinfo->atomic || cinfo->before != dir->i_version)
806 nfs_force_lookup_revalidate(dir);
807 dir->i_version = cinfo->after;
808 nfs_fscache_invalidate(dir);
809 spin_unlock(&dir->i_lock);
810}
811
812struct nfs4_opendata {
813 struct kref kref;
814 struct nfs_openargs o_arg;
815 struct nfs_openres o_res;
816 struct nfs_open_confirmargs c_arg;
817 struct nfs_open_confirmres c_res;
818 struct nfs4_string owner_name;
819 struct nfs4_string group_name;
820 struct nfs_fattr f_attr;
821 struct nfs4_label *f_label;
822 struct dentry *dir;
823 struct dentry *dentry;
824 struct nfs4_state_owner *owner;
825 struct nfs4_state *state;
826 struct iattr attrs;
827 unsigned long timestamp;
828 unsigned int rpc_done : 1;
829 unsigned int is_recover : 1;
830 int rpc_status;
831 int cancelled;
832};
833
834static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
835 int err, struct nfs4_exception *exception)
836{
837 if (err != -EINVAL)
838 return false;
839 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
840 return false;
841 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
842 exception->retry = 1;
843 return true;
844}
845
846static enum open_claim_type4
847nfs4_map_atomic_open_claim(struct nfs_server *server,
848 enum open_claim_type4 claim)
849{
850 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
851 return claim;
852 switch (claim) {
853 default:
854 return claim;
855 case NFS4_OPEN_CLAIM_FH:
856 return NFS4_OPEN_CLAIM_NULL;
857 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
858 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
859 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
860 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
861 }
862}
863
864static void nfs4_init_opendata_res(struct nfs4_opendata *p)
865{
866 p->o_res.f_attr = &p->f_attr;
867 p->o_res.f_label = p->f_label;
868 p->o_res.seqid = p->o_arg.seqid;
869 p->c_res.seqid = p->c_arg.seqid;
870 p->o_res.server = p->o_arg.server;
871 p->o_res.access_request = p->o_arg.access;
872 nfs_fattr_init(&p->f_attr);
873 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
874}
875
876static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
877 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
878 const struct iattr *attrs,
879 struct nfs4_label *label,
880 enum open_claim_type4 claim,
881 gfp_t gfp_mask)
882{
883 struct dentry *parent = dget_parent(dentry);
884 struct inode *dir = parent->d_inode;
885 struct nfs_server *server = NFS_SERVER(dir);
886 struct nfs4_opendata *p;
887
888 p = kzalloc(sizeof(*p), gfp_mask);
889 if (p == NULL)
890 goto err;
891
892 p->f_label = nfs4_label_alloc(server, gfp_mask);
893 if (IS_ERR(p->f_label))
894 goto err_free_p;
895
896 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
897 if (p->o_arg.seqid == NULL)
898 goto err_free_label;
899 nfs_sb_active(dentry->d_sb);
900 p->dentry = dget(dentry);
901 p->dir = parent;
902 p->owner = sp;
903 atomic_inc(&sp->so_count);
904 p->o_arg.open_flags = flags;
905 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
906 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
907 * will return permission denied for all bits until close */
908 if (!(flags & O_EXCL)) {
909 /* ask server to check for all possible rights as results
910 * are cached */
911 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
912 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
913 }
914 p->o_arg.clientid = server->nfs_client->cl_clientid;
915 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
916 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
917 p->o_arg.name = &dentry->d_name;
918 p->o_arg.server = server;
919 p->o_arg.bitmask = nfs4_bitmask(server, label);
920 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
921 p->o_arg.label = label;
922 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
923 switch (p->o_arg.claim) {
924 case NFS4_OPEN_CLAIM_NULL:
925 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
926 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
927 p->o_arg.fh = NFS_FH(dir);
928 break;
929 case NFS4_OPEN_CLAIM_PREVIOUS:
930 case NFS4_OPEN_CLAIM_FH:
931 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
933 p->o_arg.fh = NFS_FH(dentry->d_inode);
934 }
935 if (attrs != NULL && attrs->ia_valid != 0) {
936 __u32 verf[2];
937
938 p->o_arg.u.attrs = &p->attrs;
939 memcpy(&p->attrs, attrs, sizeof(p->attrs));
940
941 verf[0] = jiffies;
942 verf[1] = current->pid;
943 memcpy(p->o_arg.u.verifier.data, verf,
944 sizeof(p->o_arg.u.verifier.data));
945 }
946 p->c_arg.fh = &p->o_res.fh;
947 p->c_arg.stateid = &p->o_res.stateid;
948 p->c_arg.seqid = p->o_arg.seqid;
949 nfs4_init_opendata_res(p);
950 kref_init(&p->kref);
951 return p;
952
953err_free_label:
954 nfs4_label_free(p->f_label);
955err_free_p:
956 kfree(p);
957err:
958 dput(parent);
959 return NULL;
960}
961
962static void nfs4_opendata_free(struct kref *kref)
963{
964 struct nfs4_opendata *p = container_of(kref,
965 struct nfs4_opendata, kref);
966 struct super_block *sb = p->dentry->d_sb;
967
968 nfs_free_seqid(p->o_arg.seqid);
969 if (p->state != NULL)
970 nfs4_put_open_state(p->state);
971 nfs4_put_state_owner(p->owner);
972
973 nfs4_label_free(p->f_label);
974
975 dput(p->dir);
976 dput(p->dentry);
977 nfs_sb_deactive(sb);
978 nfs_fattr_free_names(&p->f_attr);
979 kfree(p);
980}
981
982static void nfs4_opendata_put(struct nfs4_opendata *p)
983{
984 if (p != NULL)
985 kref_put(&p->kref, nfs4_opendata_free);
986}
987
988static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
989{
990 int ret;
991
992 ret = rpc_wait_for_completion_task(task);
993 return ret;
994}
995
996static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
997{
998 int ret = 0;
999
1000 if (open_mode & (O_EXCL|O_TRUNC))
1001 goto out;
1002 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1003 case FMODE_READ:
1004 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1005 && state->n_rdonly != 0;
1006 break;
1007 case FMODE_WRITE:
1008 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1009 && state->n_wronly != 0;
1010 break;
1011 case FMODE_READ|FMODE_WRITE:
1012 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1013 && state->n_rdwr != 0;
1014 }
1015out:
1016 return ret;
1017}
1018
1019static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1020{
1021 if (delegation == NULL)
1022 return 0;
1023 if ((delegation->type & fmode) != fmode)
1024 return 0;
1025 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1026 return 0;
1027 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1028 return 0;
1029 nfs_mark_delegation_referenced(delegation);
1030 return 1;
1031}
1032
1033static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1034{
1035 switch (fmode) {
1036 case FMODE_WRITE:
1037 state->n_wronly++;
1038 break;
1039 case FMODE_READ:
1040 state->n_rdonly++;
1041 break;
1042 case FMODE_READ|FMODE_WRITE:
1043 state->n_rdwr++;
1044 }
1045 nfs4_state_set_mode_locked(state, state->state | fmode);
1046}
1047
1048static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1049{
1050 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1051 nfs4_stateid_copy(&state->stateid, stateid);
1052 nfs4_stateid_copy(&state->open_stateid, stateid);
1053 set_bit(NFS_OPEN_STATE, &state->flags);
1054 switch (fmode) {
1055 case FMODE_READ:
1056 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1057 break;
1058 case FMODE_WRITE:
1059 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1060 break;
1061 case FMODE_READ|FMODE_WRITE:
1062 set_bit(NFS_O_RDWR_STATE, &state->flags);
1063 }
1064}
1065
1066static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1067{
1068 write_seqlock(&state->seqlock);
1069 nfs_set_open_stateid_locked(state, stateid, fmode);
1070 write_sequnlock(&state->seqlock);
1071}
1072
1073static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1074{
1075 /*
1076 * Protect the call to nfs4_state_set_mode_locked and
1077 * serialise the stateid update
1078 */
1079 write_seqlock(&state->seqlock);
1080 if (deleg_stateid != NULL) {
1081 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1082 set_bit(NFS_DELEGATED_STATE, &state->flags);
1083 }
1084 if (open_stateid != NULL)
1085 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1086 write_sequnlock(&state->seqlock);
1087 spin_lock(&state->owner->so_lock);
1088 update_open_stateflags(state, fmode);
1089 spin_unlock(&state->owner->so_lock);
1090}
1091
1092static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1093{
1094 struct nfs_inode *nfsi = NFS_I(state->inode);
1095 struct nfs_delegation *deleg_cur;
1096 int ret = 0;
1097
1098 fmode &= (FMODE_READ|FMODE_WRITE);
1099
1100 rcu_read_lock();
1101 deleg_cur = rcu_dereference(nfsi->delegation);
1102 if (deleg_cur == NULL)
1103 goto no_delegation;
1104
1105 spin_lock(&deleg_cur->lock);
1106 if (nfsi->delegation != deleg_cur ||
1107 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1108 (deleg_cur->type & fmode) != fmode)
1109 goto no_delegation_unlock;
1110
1111 if (delegation == NULL)
1112 delegation = &deleg_cur->stateid;
1113 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1114 goto no_delegation_unlock;
1115
1116 nfs_mark_delegation_referenced(deleg_cur);
1117 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1118 ret = 1;
1119no_delegation_unlock:
1120 spin_unlock(&deleg_cur->lock);
1121no_delegation:
1122 rcu_read_unlock();
1123
1124 if (!ret && open_stateid != NULL) {
1125 __update_open_stateid(state, open_stateid, NULL, fmode);
1126 ret = 1;
1127 }
1128
1129 return ret;
1130}
1131
1132
1133static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1134{
1135 struct nfs_delegation *delegation;
1136
1137 rcu_read_lock();
1138 delegation = rcu_dereference(NFS_I(inode)->delegation);
1139 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1140 rcu_read_unlock();
1141 return;
1142 }
1143 rcu_read_unlock();
1144 nfs4_inode_return_delegation(inode);
1145}
1146
1147static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1148{
1149 struct nfs4_state *state = opendata->state;
1150 struct nfs_inode *nfsi = NFS_I(state->inode);
1151 struct nfs_delegation *delegation;
1152 int open_mode = opendata->o_arg.open_flags;
1153 fmode_t fmode = opendata->o_arg.fmode;
1154 nfs4_stateid stateid;
1155 int ret = -EAGAIN;
1156
1157 for (;;) {
1158 if (can_open_cached(state, fmode, open_mode)) {
1159 spin_lock(&state->owner->so_lock);
1160 if (can_open_cached(state, fmode, open_mode)) {
1161 update_open_stateflags(state, fmode);
1162 spin_unlock(&state->owner->so_lock);
1163 goto out_return_state;
1164 }
1165 spin_unlock(&state->owner->so_lock);
1166 }
1167 rcu_read_lock();
1168 delegation = rcu_dereference(nfsi->delegation);
1169 if (!can_open_delegated(delegation, fmode)) {
1170 rcu_read_unlock();
1171 break;
1172 }
1173 /* Save the delegation */
1174 nfs4_stateid_copy(&stateid, &delegation->stateid);
1175 rcu_read_unlock();
1176 nfs_release_seqid(opendata->o_arg.seqid);
1177 if (!opendata->is_recover) {
1178 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1179 if (ret != 0)
1180 goto out;
1181 }
1182 ret = -EAGAIN;
1183
1184 /* Try to update the stateid using the delegation */
1185 if (update_open_stateid(state, NULL, &stateid, fmode))
1186 goto out_return_state;
1187 }
1188out:
1189 return ERR_PTR(ret);
1190out_return_state:
1191 atomic_inc(&state->count);
1192 return state;
1193}
1194
1195static void
1196nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1197{
1198 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1199 struct nfs_delegation *delegation;
1200 int delegation_flags = 0;
1201
1202 rcu_read_lock();
1203 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1204 if (delegation)
1205 delegation_flags = delegation->flags;
1206 rcu_read_unlock();
1207 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1208 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1209 "returning a delegation for "
1210 "OPEN(CLAIM_DELEGATE_CUR)\n",
1211 clp->cl_hostname);
1212 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1213 nfs_inode_set_delegation(state->inode,
1214 data->owner->so_cred,
1215 &data->o_res);
1216 else
1217 nfs_inode_reclaim_delegation(state->inode,
1218 data->owner->so_cred,
1219 &data->o_res);
1220}
1221
1222/*
1223 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1224 * and update the nfs4_state.
1225 */
1226static struct nfs4_state *
1227_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1228{
1229 struct inode *inode = data->state->inode;
1230 struct nfs4_state *state = data->state;
1231 int ret;
1232
1233 if (!data->rpc_done) {
1234 ret = data->rpc_status;
1235 goto err;
1236 }
1237
1238 ret = -ESTALE;
1239 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1240 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1241 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1242 goto err;
1243
1244 ret = -ENOMEM;
1245 state = nfs4_get_open_state(inode, data->owner);
1246 if (state == NULL)
1247 goto err;
1248
1249 ret = nfs_refresh_inode(inode, &data->f_attr);
1250 if (ret)
1251 goto err;
1252
1253 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1254
1255 if (data->o_res.delegation_type != 0)
1256 nfs4_opendata_check_deleg(data, state);
1257 update_open_stateid(state, &data->o_res.stateid, NULL,
1258 data->o_arg.fmode);
1259
1260 return state;
1261err:
1262 return ERR_PTR(ret);
1263
1264}
1265
1266static struct nfs4_state *
1267_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1268{
1269 struct inode *inode;
1270 struct nfs4_state *state = NULL;
1271 int ret;
1272
1273 if (!data->rpc_done) {
1274 state = nfs4_try_open_cached(data);
1275 goto out;
1276 }
1277
1278 ret = -EAGAIN;
1279 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1280 goto err;
1281 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1282 ret = PTR_ERR(inode);
1283 if (IS_ERR(inode))
1284 goto err;
1285 ret = -ENOMEM;
1286 state = nfs4_get_open_state(inode, data->owner);
1287 if (state == NULL)
1288 goto err_put_inode;
1289 if (data->o_res.delegation_type != 0)
1290 nfs4_opendata_check_deleg(data, state);
1291 update_open_stateid(state, &data->o_res.stateid, NULL,
1292 data->o_arg.fmode);
1293 iput(inode);
1294out:
1295 nfs_release_seqid(data->o_arg.seqid);
1296 return state;
1297err_put_inode:
1298 iput(inode);
1299err:
1300 return ERR_PTR(ret);
1301}
1302
1303static struct nfs4_state *
1304nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1305{
1306 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1307 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1308 return _nfs4_opendata_to_nfs4_state(data);
1309}
1310
1311static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1312{
1313 struct nfs_inode *nfsi = NFS_I(state->inode);
1314 struct nfs_open_context *ctx;
1315
1316 spin_lock(&state->inode->i_lock);
1317 list_for_each_entry(ctx, &nfsi->open_files, list) {
1318 if (ctx->state != state)
1319 continue;
1320 get_nfs_open_context(ctx);
1321 spin_unlock(&state->inode->i_lock);
1322 return ctx;
1323 }
1324 spin_unlock(&state->inode->i_lock);
1325 return ERR_PTR(-ENOENT);
1326}
1327
1328static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1329 struct nfs4_state *state, enum open_claim_type4 claim)
1330{
1331 struct nfs4_opendata *opendata;
1332
1333 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1334 NULL, NULL, claim, GFP_NOFS);
1335 if (opendata == NULL)
1336 return ERR_PTR(-ENOMEM);
1337 opendata->state = state;
1338 atomic_inc(&state->count);
1339 return opendata;
1340}
1341
1342static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1343{
1344 struct nfs4_state *newstate;
1345 int ret;
1346
1347 opendata->o_arg.open_flags = 0;
1348 opendata->o_arg.fmode = fmode;
1349 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1350 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1351 nfs4_init_opendata_res(opendata);
1352 ret = _nfs4_recover_proc_open(opendata);
1353 if (ret != 0)
1354 return ret;
1355 newstate = nfs4_opendata_to_nfs4_state(opendata);
1356 if (IS_ERR(newstate))
1357 return PTR_ERR(newstate);
1358 nfs4_close_state(newstate, fmode);
1359 *res = newstate;
1360 return 0;
1361}
1362
1363static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1364{
1365 struct nfs4_state *newstate;
1366 int ret;
1367
1368 /* memory barrier prior to reading state->n_* */
1369 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1370 clear_bit(NFS_OPEN_STATE, &state->flags);
1371 smp_rmb();
1372 if (state->n_rdwr != 0) {
1373 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1374 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1375 if (ret != 0)
1376 return ret;
1377 if (newstate != state)
1378 return -ESTALE;
1379 }
1380 if (state->n_wronly != 0) {
1381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1382 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1383 if (ret != 0)
1384 return ret;
1385 if (newstate != state)
1386 return -ESTALE;
1387 }
1388 if (state->n_rdonly != 0) {
1389 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1390 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1391 if (ret != 0)
1392 return ret;
1393 if (newstate != state)
1394 return -ESTALE;
1395 }
1396 /*
1397 * We may have performed cached opens for all three recoveries.
1398 * Check if we need to update the current stateid.
1399 */
1400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1401 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1402 write_seqlock(&state->seqlock);
1403 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1404 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1405 write_sequnlock(&state->seqlock);
1406 }
1407 return 0;
1408}
1409
1410/*
1411 * OPEN_RECLAIM:
1412 * reclaim state on the server after a reboot.
1413 */
1414static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1415{
1416 struct nfs_delegation *delegation;
1417 struct nfs4_opendata *opendata;
1418 fmode_t delegation_type = 0;
1419 int status;
1420
1421 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1422 NFS4_OPEN_CLAIM_PREVIOUS);
1423 if (IS_ERR(opendata))
1424 return PTR_ERR(opendata);
1425 rcu_read_lock();
1426 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1427 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1428 delegation_type = delegation->type;
1429 rcu_read_unlock();
1430 opendata->o_arg.u.delegation_type = delegation_type;
1431 status = nfs4_open_recover(opendata, state);
1432 nfs4_opendata_put(opendata);
1433 return status;
1434}
1435
1436static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1437{
1438 struct nfs_server *server = NFS_SERVER(state->inode);
1439 struct nfs4_exception exception = { };
1440 int err;
1441 do {
1442 err = _nfs4_do_open_reclaim(ctx, state);
1443 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1444 continue;
1445 if (err != -NFS4ERR_DELAY)
1446 break;
1447 nfs4_handle_exception(server, err, &exception);
1448 } while (exception.retry);
1449 return err;
1450}
1451
1452static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1453{
1454 struct nfs_open_context *ctx;
1455 int ret;
1456
1457 ctx = nfs4_state_find_open_context(state);
1458 if (IS_ERR(ctx))
1459 return -EAGAIN;
1460 ret = nfs4_do_open_reclaim(ctx, state);
1461 put_nfs_open_context(ctx);
1462 return ret;
1463}
1464
1465static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1466{
1467 switch (err) {
1468 default:
1469 printk(KERN_ERR "NFS: %s: unhandled error "
1470 "%d.\n", __func__, err);
1471 case 0:
1472 case -ENOENT:
1473 case -ESTALE:
1474 break;
1475 case -NFS4ERR_BADSESSION:
1476 case -NFS4ERR_BADSLOT:
1477 case -NFS4ERR_BAD_HIGH_SLOT:
1478 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1479 case -NFS4ERR_DEADSESSION:
1480 set_bit(NFS_DELEGATED_STATE, &state->flags);
1481 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1482 return -EAGAIN;
1483 case -NFS4ERR_STALE_CLIENTID:
1484 case -NFS4ERR_STALE_STATEID:
1485 set_bit(NFS_DELEGATED_STATE, &state->flags);
1486 case -NFS4ERR_EXPIRED:
1487 /* Don't recall a delegation if it was lost */
1488 nfs4_schedule_lease_recovery(server->nfs_client);
1489 return -EAGAIN;
1490 case -NFS4ERR_DELEG_REVOKED:
1491 case -NFS4ERR_ADMIN_REVOKED:
1492 case -NFS4ERR_BAD_STATEID:
1493 case -NFS4ERR_OPENMODE:
1494 nfs_inode_find_state_and_recover(state->inode,
1495 stateid);
1496 nfs4_schedule_stateid_recovery(server, state);
1497 return 0;
1498 case -NFS4ERR_DELAY:
1499 case -NFS4ERR_GRACE:
1500 set_bit(NFS_DELEGATED_STATE, &state->flags);
1501 ssleep(1);
1502 return -EAGAIN;
1503 case -ENOMEM:
1504 case -NFS4ERR_DENIED:
1505 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1506 return 0;
1507 }
1508 return err;
1509}
1510
1511int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1512{
1513 struct nfs_server *server = NFS_SERVER(state->inode);
1514 struct nfs4_opendata *opendata;
1515 int err;
1516
1517 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1518 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519 if (IS_ERR(opendata))
1520 return PTR_ERR(opendata);
1521 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1522 err = nfs4_open_recover(opendata, state);
1523 nfs4_opendata_put(opendata);
1524 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1525}
1526
1527static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1528{
1529 struct nfs4_opendata *data = calldata;
1530
1531 data->rpc_status = task->tk_status;
1532 if (data->rpc_status == 0) {
1533 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1534 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1535 renew_lease(data->o_res.server, data->timestamp);
1536 data->rpc_done = 1;
1537 }
1538}
1539
1540static void nfs4_open_confirm_release(void *calldata)
1541{
1542 struct nfs4_opendata *data = calldata;
1543 struct nfs4_state *state = NULL;
1544
1545 /* If this request hasn't been cancelled, do nothing */
1546 if (data->cancelled == 0)
1547 goto out_free;
1548 /* In case of error, no cleanup! */
1549 if (!data->rpc_done)
1550 goto out_free;
1551 state = nfs4_opendata_to_nfs4_state(data);
1552 if (!IS_ERR(state))
1553 nfs4_close_state(state, data->o_arg.fmode);
1554out_free:
1555 nfs4_opendata_put(data);
1556}
1557
1558static const struct rpc_call_ops nfs4_open_confirm_ops = {
1559 .rpc_call_done = nfs4_open_confirm_done,
1560 .rpc_release = nfs4_open_confirm_release,
1561};
1562
1563/*
1564 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1565 */
1566static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1567{
1568 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1569 struct rpc_task *task;
1570 struct rpc_message msg = {
1571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1572 .rpc_argp = &data->c_arg,
1573 .rpc_resp = &data->c_res,
1574 .rpc_cred = data->owner->so_cred,
1575 };
1576 struct rpc_task_setup task_setup_data = {
1577 .rpc_client = server->client,
1578 .rpc_message = &msg,
1579 .callback_ops = &nfs4_open_confirm_ops,
1580 .callback_data = data,
1581 .workqueue = nfsiod_workqueue,
1582 .flags = RPC_TASK_ASYNC,
1583 };
1584 int status;
1585
1586 kref_get(&data->kref);
1587 data->rpc_done = 0;
1588 data->rpc_status = 0;
1589 data->timestamp = jiffies;
1590 task = rpc_run_task(&task_setup_data);
1591 if (IS_ERR(task))
1592 return PTR_ERR(task);
1593 status = nfs4_wait_for_completion_rpc_task(task);
1594 if (status != 0) {
1595 data->cancelled = 1;
1596 smp_wmb();
1597 } else
1598 status = data->rpc_status;
1599 rpc_put_task(task);
1600 return status;
1601}
1602
1603static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1604{
1605 struct nfs4_opendata *data = calldata;
1606 struct nfs4_state_owner *sp = data->owner;
1607 struct nfs_client *clp = sp->so_server->nfs_client;
1608
1609 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1610 goto out_wait;
1611 /*
1612 * Check if we still need to send an OPEN call, or if we can use
1613 * a delegation instead.
1614 */
1615 if (data->state != NULL) {
1616 struct nfs_delegation *delegation;
1617
1618 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1619 goto out_no_action;
1620 rcu_read_lock();
1621 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1622 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1623 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1624 can_open_delegated(delegation, data->o_arg.fmode))
1625 goto unlock_no_action;
1626 rcu_read_unlock();
1627 }
1628 /* Update client id. */
1629 data->o_arg.clientid = clp->cl_clientid;
1630 switch (data->o_arg.claim) {
1631 case NFS4_OPEN_CLAIM_PREVIOUS:
1632 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1633 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1634 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1635 case NFS4_OPEN_CLAIM_FH:
1636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1637 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1638 }
1639 data->timestamp = jiffies;
1640 if (nfs4_setup_sequence(data->o_arg.server,
1641 &data->o_arg.seq_args,
1642 &data->o_res.seq_res,
1643 task) != 0)
1644 nfs_release_seqid(data->o_arg.seqid);
1645
1646 /* Set the create mode (note dependency on the session type) */
1647 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1648 if (data->o_arg.open_flags & O_EXCL) {
1649 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1650 if (nfs4_has_persistent_session(clp))
1651 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1652 else if (clp->cl_mvops->minor_version > 0)
1653 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1654 }
1655 return;
1656unlock_no_action:
1657 rcu_read_unlock();
1658out_no_action:
1659 task->tk_action = NULL;
1660out_wait:
1661 nfs4_sequence_done(task, &data->o_res.seq_res);
1662}
1663
1664static void nfs4_open_done(struct rpc_task *task, void *calldata)
1665{
1666 struct nfs4_opendata *data = calldata;
1667
1668 data->rpc_status = task->tk_status;
1669
1670 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1671 return;
1672
1673 if (task->tk_status == 0) {
1674 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1675 switch (data->o_res.f_attr->mode & S_IFMT) {
1676 case S_IFREG:
1677 break;
1678 case S_IFLNK:
1679 data->rpc_status = -ELOOP;
1680 break;
1681 case S_IFDIR:
1682 data->rpc_status = -EISDIR;
1683 break;
1684 default:
1685 data->rpc_status = -ENOTDIR;
1686 }
1687 }
1688 renew_lease(data->o_res.server, data->timestamp);
1689 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1690 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1691 }
1692 data->rpc_done = 1;
1693}
1694
1695static void nfs4_open_release(void *calldata)
1696{
1697 struct nfs4_opendata *data = calldata;
1698 struct nfs4_state *state = NULL;
1699
1700 /* If this request hasn't been cancelled, do nothing */
1701 if (data->cancelled == 0)
1702 goto out_free;
1703 /* In case of error, no cleanup! */
1704 if (data->rpc_status != 0 || !data->rpc_done)
1705 goto out_free;
1706 /* In case we need an open_confirm, no cleanup! */
1707 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1708 goto out_free;
1709 state = nfs4_opendata_to_nfs4_state(data);
1710 if (!IS_ERR(state))
1711 nfs4_close_state(state, data->o_arg.fmode);
1712out_free:
1713 nfs4_opendata_put(data);
1714}
1715
1716static const struct rpc_call_ops nfs4_open_ops = {
1717 .rpc_call_prepare = nfs4_open_prepare,
1718 .rpc_call_done = nfs4_open_done,
1719 .rpc_release = nfs4_open_release,
1720};
1721
1722static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1723{
1724 struct inode *dir = data->dir->d_inode;
1725 struct nfs_server *server = NFS_SERVER(dir);
1726 struct nfs_openargs *o_arg = &data->o_arg;
1727 struct nfs_openres *o_res = &data->o_res;
1728 struct rpc_task *task;
1729 struct rpc_message msg = {
1730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1731 .rpc_argp = o_arg,
1732 .rpc_resp = o_res,
1733 .rpc_cred = data->owner->so_cred,
1734 };
1735 struct rpc_task_setup task_setup_data = {
1736 .rpc_client = server->client,
1737 .rpc_message = &msg,
1738 .callback_ops = &nfs4_open_ops,
1739 .callback_data = data,
1740 .workqueue = nfsiod_workqueue,
1741 .flags = RPC_TASK_ASYNC,
1742 };
1743 int status;
1744
1745 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1746 kref_get(&data->kref);
1747 data->rpc_done = 0;
1748 data->rpc_status = 0;
1749 data->cancelled = 0;
1750 data->is_recover = 0;
1751 if (isrecover) {
1752 nfs4_set_sequence_privileged(&o_arg->seq_args);
1753 data->is_recover = 1;
1754 }
1755 task = rpc_run_task(&task_setup_data);
1756 if (IS_ERR(task))
1757 return PTR_ERR(task);
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;
1764 rpc_put_task(task);
1765
1766 return status;
1767}
1768
1769static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1770{
1771 struct inode *dir = data->dir->d_inode;
1772 struct nfs_openres *o_res = &data->o_res;
1773 int status;
1774
1775 status = nfs4_run_open_task(data, 1);
1776 if (status != 0 || !data->rpc_done)
1777 return status;
1778
1779 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1780
1781 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1782 status = _nfs4_proc_open_confirm(data);
1783 if (status != 0)
1784 return status;
1785 }
1786
1787 return status;
1788}
1789
1790static int nfs4_opendata_access(struct rpc_cred *cred,
1791 struct nfs4_opendata *opendata,
1792 struct nfs4_state *state, fmode_t fmode,
1793 int openflags)
1794{
1795 struct nfs_access_entry cache;
1796 u32 mask;
1797
1798 /* access call failed or for some reason the server doesn't
1799 * support any access modes -- defer access call until later */
1800 if (opendata->o_res.access_supported == 0)
1801 return 0;
1802
1803 mask = 0;
1804 /* don't check MAY_WRITE - a newly created file may not have
1805 * write mode bits, but POSIX allows the creating process to write.
1806 * use openflags to check for exec, because fmode won't
1807 * always have FMODE_EXEC set when file open for exec. */
1808 if (openflags & __FMODE_EXEC) {
1809 /* ONLY check for exec rights */
1810 mask = MAY_EXEC;
1811 } else if (fmode & FMODE_READ)
1812 mask = MAY_READ;
1813
1814 cache.cred = cred;
1815 cache.jiffies = jiffies;
1816 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1817 nfs_access_add_cache(state->inode, &cache);
1818
1819 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1820 return 0;
1821
1822 /* even though OPEN succeeded, access is denied. Close the file */
1823 nfs4_close_state(state, fmode);
1824 return -EACCES;
1825}
1826
1827/*
1828 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1829 */
1830static int _nfs4_proc_open(struct nfs4_opendata *data)
1831{
1832 struct inode *dir = data->dir->d_inode;
1833 struct nfs_server *server = NFS_SERVER(dir);
1834 struct nfs_openargs *o_arg = &data->o_arg;
1835 struct nfs_openres *o_res = &data->o_res;
1836 int status;
1837
1838 status = nfs4_run_open_task(data, 0);
1839 if (!data->rpc_done)
1840 return status;
1841 if (status != 0) {
1842 if (status == -NFS4ERR_BADNAME &&
1843 !(o_arg->open_flags & O_CREAT))
1844 return -ENOENT;
1845 return status;
1846 }
1847
1848 nfs_fattr_map_and_free_names(server, &data->f_attr);
1849
1850 if (o_arg->open_flags & O_CREAT)
1851 update_changeattr(dir, &o_res->cinfo);
1852 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1853 server->caps &= ~NFS_CAP_POSIX_LOCK;
1854 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1855 status = _nfs4_proc_open_confirm(data);
1856 if (status != 0)
1857 return status;
1858 }
1859 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1860 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
1861 return 0;
1862}
1863
1864static int nfs4_recover_expired_lease(struct nfs_server *server)
1865{
1866 return nfs4_client_recover_expired_lease(server->nfs_client);
1867}
1868
1869/*
1870 * OPEN_EXPIRED:
1871 * reclaim state on the server after a network partition.
1872 * Assumes caller holds the appropriate lock
1873 */
1874static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1875{
1876 struct nfs4_opendata *opendata;
1877 int ret;
1878
1879 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1880 NFS4_OPEN_CLAIM_FH);
1881 if (IS_ERR(opendata))
1882 return PTR_ERR(opendata);
1883 ret = nfs4_open_recover(opendata, state);
1884 if (ret == -ESTALE)
1885 d_drop(ctx->dentry);
1886 nfs4_opendata_put(opendata);
1887 return ret;
1888}
1889
1890static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1891{
1892 struct nfs_server *server = NFS_SERVER(state->inode);
1893 struct nfs4_exception exception = { };
1894 int err;
1895
1896 do {
1897 err = _nfs4_open_expired(ctx, state);
1898 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1899 continue;
1900 switch (err) {
1901 default:
1902 goto out;
1903 case -NFS4ERR_GRACE:
1904 case -NFS4ERR_DELAY:
1905 nfs4_handle_exception(server, err, &exception);
1906 err = 0;
1907 }
1908 } while (exception.retry);
1909out:
1910 return err;
1911}
1912
1913static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1914{
1915 struct nfs_open_context *ctx;
1916 int ret;
1917
1918 ctx = nfs4_state_find_open_context(state);
1919 if (IS_ERR(ctx))
1920 return -EAGAIN;
1921 ret = nfs4_do_open_expired(ctx, state);
1922 put_nfs_open_context(ctx);
1923 return ret;
1924}
1925
1926#if defined(CONFIG_NFS_V4_1)
1927static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1928{
1929 struct nfs_server *server = NFS_SERVER(state->inode);
1930 nfs4_stateid *stateid = &state->stateid;
1931 struct nfs_delegation *delegation;
1932 struct rpc_cred *cred = NULL;
1933 int status = -NFS4ERR_BAD_STATEID;
1934
1935 /* If a state reset has been done, test_stateid is unneeded */
1936 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1937 return;
1938
1939 /* Get the delegation credential for use by test/free_stateid */
1940 rcu_read_lock();
1941 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1942 if (delegation != NULL &&
1943 nfs4_stateid_match(&delegation->stateid, stateid)) {
1944 cred = get_rpccred(delegation->cred);
1945 rcu_read_unlock();
1946 status = nfs41_test_stateid(server, stateid, cred);
1947 } else
1948 rcu_read_unlock();
1949
1950 if (status != NFS_OK) {
1951 /* Free the stateid unless the server explicitly
1952 * informs us the stateid is unrecognized. */
1953 if (status != -NFS4ERR_BAD_STATEID)
1954 nfs41_free_stateid(server, stateid, cred);
1955 nfs_remove_bad_delegation(state->inode);
1956
1957 write_seqlock(&state->seqlock);
1958 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1959 write_sequnlock(&state->seqlock);
1960 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1961 }
1962
1963 if (cred != NULL)
1964 put_rpccred(cred);
1965}
1966
1967/**
1968 * nfs41_check_open_stateid - possibly free an open stateid
1969 *
1970 * @state: NFSv4 state for an inode
1971 *
1972 * Returns NFS_OK if recovery for this stateid is now finished.
1973 * Otherwise a negative NFS4ERR value is returned.
1974 */
1975static int nfs41_check_open_stateid(struct nfs4_state *state)
1976{
1977 struct nfs_server *server = NFS_SERVER(state->inode);
1978 nfs4_stateid *stateid = &state->open_stateid;
1979 struct rpc_cred *cred = state->owner->so_cred;
1980 int status;
1981
1982 /* If a state reset has been done, test_stateid is unneeded */
1983 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1984 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1985 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1986 return -NFS4ERR_BAD_STATEID;
1987
1988 status = nfs41_test_stateid(server, stateid, cred);
1989 if (status != NFS_OK) {
1990 /* Free the stateid unless the server explicitly
1991 * informs us the stateid is unrecognized. */
1992 if (status != -NFS4ERR_BAD_STATEID)
1993 nfs41_free_stateid(server, stateid, cred);
1994
1995 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1996 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1997 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1998 clear_bit(NFS_OPEN_STATE, &state->flags);
1999 }
2000 return status;
2001}
2002
2003static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2004{
2005 int status;
2006
2007 nfs41_clear_delegation_stateid(state);
2008 status = nfs41_check_open_stateid(state);
2009 if (status != NFS_OK)
2010 status = nfs4_open_expired(sp, state);
2011 return status;
2012}
2013#endif
2014
2015/*
2016 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2017 * fields corresponding to attributes that were used to store the verifier.
2018 * Make sure we clobber those fields in the later setattr call
2019 */
2020static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2021{
2022 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2023 !(sattr->ia_valid & ATTR_ATIME_SET))
2024 sattr->ia_valid |= ATTR_ATIME;
2025
2026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2027 !(sattr->ia_valid & ATTR_MTIME_SET))
2028 sattr->ia_valid |= ATTR_MTIME;
2029}
2030
2031static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2032 fmode_t fmode,
2033 int flags,
2034 struct nfs_open_context *ctx)
2035{
2036 struct nfs4_state_owner *sp = opendata->owner;
2037 struct nfs_server *server = sp->so_server;
2038 struct dentry *dentry;
2039 struct nfs4_state *state;
2040 unsigned int seq;
2041 int ret;
2042
2043 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2044
2045 ret = _nfs4_proc_open(opendata);
2046 if (ret != 0)
2047 goto out;
2048
2049 state = nfs4_opendata_to_nfs4_state(opendata);
2050 ret = PTR_ERR(state);
2051 if (IS_ERR(state))
2052 goto out;
2053 if (server->caps & NFS_CAP_POSIX_LOCK)
2054 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2055
2056 dentry = opendata->dentry;
2057 if (dentry->d_inode == NULL) {
2058 /* FIXME: Is this d_drop() ever needed? */
2059 d_drop(dentry);
2060 dentry = d_add_unique(dentry, igrab(state->inode));
2061 if (dentry == NULL) {
2062 dentry = opendata->dentry;
2063 } else if (dentry != ctx->dentry) {
2064 dput(ctx->dentry);
2065 ctx->dentry = dget(dentry);
2066 }
2067 nfs_set_verifier(dentry,
2068 nfs_save_change_attribute(opendata->dir->d_inode));
2069 }
2070
2071 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2072 if (ret != 0)
2073 goto out;
2074
2075 ctx->state = state;
2076 if (dentry->d_inode == state->inode) {
2077 nfs_inode_attach_open_context(ctx);
2078 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2079 nfs4_schedule_stateid_recovery(server, state);
2080 }
2081out:
2082 return ret;
2083}
2084
2085/*
2086 * Returns a referenced nfs4_state
2087 */
2088static int _nfs4_do_open(struct inode *dir,
2089 struct nfs_open_context *ctx,
2090 int flags,
2091 struct iattr *sattr,
2092 struct nfs4_label *label)
2093{
2094 struct nfs4_state_owner *sp;
2095 struct nfs4_state *state = NULL;
2096 struct nfs_server *server = NFS_SERVER(dir);
2097 struct nfs4_opendata *opendata;
2098 struct dentry *dentry = ctx->dentry;
2099 struct rpc_cred *cred = ctx->cred;
2100 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2101 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2102 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2103 struct nfs4_label *olabel = NULL;
2104 int status;
2105
2106 /* Protect against reboot recovery conflicts */
2107 status = -ENOMEM;
2108 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2109 if (sp == NULL) {
2110 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2111 goto out_err;
2112 }
2113 status = nfs4_recover_expired_lease(server);
2114 if (status != 0)
2115 goto err_put_state_owner;
2116 if (dentry->d_inode != NULL)
2117 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2118 status = -ENOMEM;
2119 if (dentry->d_inode)
2120 claim = NFS4_OPEN_CLAIM_FH;
2121 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2122 label, claim, GFP_KERNEL);
2123 if (opendata == NULL)
2124 goto err_put_state_owner;
2125
2126 if (label) {
2127 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2128 if (IS_ERR(olabel)) {
2129 status = PTR_ERR(olabel);
2130 goto err_opendata_put;
2131 }
2132 }
2133
2134 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2135 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2136 if (!opendata->f_attr.mdsthreshold)
2137 goto err_free_label;
2138 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2139 }
2140 if (dentry->d_inode != NULL)
2141 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2142
2143 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2144 if (status != 0)
2145 goto err_free_label;
2146 state = ctx->state;
2147
2148 if ((opendata->o_arg.open_flags & O_EXCL) &&
2149 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2150 nfs4_exclusive_attrset(opendata, sattr);
2151
2152 nfs_fattr_init(opendata->o_res.f_attr);
2153 status = nfs4_do_setattr(state->inode, cred,
2154 opendata->o_res.f_attr, sattr,
2155 state, label, olabel);
2156 if (status == 0) {
2157 nfs_setattr_update_inode(state->inode, sattr);
2158 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2159 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2160 }
2161 }
2162
2163 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2164 *ctx_th = opendata->f_attr.mdsthreshold;
2165 else
2166 kfree(opendata->f_attr.mdsthreshold);
2167 opendata->f_attr.mdsthreshold = NULL;
2168
2169 nfs4_label_free(olabel);
2170
2171 nfs4_opendata_put(opendata);
2172 nfs4_put_state_owner(sp);
2173 return 0;
2174err_free_label:
2175 nfs4_label_free(olabel);
2176err_opendata_put:
2177 kfree(opendata->f_attr.mdsthreshold);
2178 nfs4_opendata_put(opendata);
2179err_put_state_owner:
2180 nfs4_put_state_owner(sp);
2181out_err:
2182 return status;
2183}
2184
2185
2186static struct nfs4_state *nfs4_do_open(struct inode *dir,
2187 struct nfs_open_context *ctx,
2188 int flags,
2189 struct iattr *sattr,
2190 struct nfs4_label *label)
2191{
2192 struct nfs_server *server = NFS_SERVER(dir);
2193 struct nfs4_exception exception = { };
2194 struct nfs4_state *res;
2195 int status;
2196
2197 do {
2198 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
2199 res = ctx->state;
2200 if (status == 0)
2201 break;
2202 /* NOTE: BAD_SEQID means the server and client disagree about the
2203 * book-keeping w.r.t. state-changing operations
2204 * (OPEN/CLOSE/LOCK/LOCKU...)
2205 * It is actually a sign of a bug on the client or on the server.
2206 *
2207 * If we receive a BAD_SEQID error in the particular case of
2208 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2209 * have unhashed the old state_owner for us, and that we can
2210 * therefore safely retry using a new one. We should still warn
2211 * the user though...
2212 */
2213 if (status == -NFS4ERR_BAD_SEQID) {
2214 pr_warn_ratelimited("NFS: v4 server %s "
2215 " returned a bad sequence-id error!\n",
2216 NFS_SERVER(dir)->nfs_client->cl_hostname);
2217 exception.retry = 1;
2218 continue;
2219 }
2220 /*
2221 * BAD_STATEID on OPEN means that the server cancelled our
2222 * state before it received the OPEN_CONFIRM.
2223 * Recover by retrying the request as per the discussion
2224 * on Page 181 of RFC3530.
2225 */
2226 if (status == -NFS4ERR_BAD_STATEID) {
2227 exception.retry = 1;
2228 continue;
2229 }
2230 if (status == -EAGAIN) {
2231 /* We must have found a delegation */
2232 exception.retry = 1;
2233 continue;
2234 }
2235 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2236 continue;
2237 res = ERR_PTR(nfs4_handle_exception(server,
2238 status, &exception));
2239 } while (exception.retry);
2240 return res;
2241}
2242
2243static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2244 struct nfs_fattr *fattr, struct iattr *sattr,
2245 struct nfs4_state *state, struct nfs4_label *ilabel,
2246 struct nfs4_label *olabel)
2247{
2248 struct nfs_server *server = NFS_SERVER(inode);
2249 struct nfs_setattrargs arg = {
2250 .fh = NFS_FH(inode),
2251 .iap = sattr,
2252 .server = server,
2253 .bitmask = server->attr_bitmask,
2254 .label = ilabel,
2255 };
2256 struct nfs_setattrres res = {
2257 .fattr = fattr,
2258 .label = olabel,
2259 .server = server,
2260 };
2261 struct rpc_message msg = {
2262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2263 .rpc_argp = &arg,
2264 .rpc_resp = &res,
2265 .rpc_cred = cred,
2266 };
2267 unsigned long timestamp = jiffies;
2268 fmode_t fmode;
2269 bool truncate;
2270 int status;
2271
2272 arg.bitmask = nfs4_bitmask(server, ilabel);
2273 if (ilabel)
2274 arg.bitmask = nfs4_bitmask(server, olabel);
2275
2276 nfs_fattr_init(fattr);
2277
2278 /* Servers should only apply open mode checks for file size changes */
2279 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2280 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2281
2282 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2283 /* Use that stateid */
2284 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2285 struct nfs_lockowner lockowner = {
2286 .l_owner = current->files,
2287 .l_pid = current->tgid,
2288 };
2289 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2290 &lockowner);
2291 } else
2292 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2293
2294 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2295 if (status == 0 && state != NULL)
2296 renew_lease(server, timestamp);
2297 return status;
2298}
2299
2300static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2301 struct nfs_fattr *fattr, struct iattr *sattr,
2302 struct nfs4_state *state, struct nfs4_label *ilabel,
2303 struct nfs4_label *olabel)
2304{
2305 struct nfs_server *server = NFS_SERVER(inode);
2306 struct nfs4_exception exception = {
2307 .state = state,
2308 .inode = inode,
2309 };
2310 int err;
2311 do {
2312 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2313 switch (err) {
2314 case -NFS4ERR_OPENMODE:
2315 if (!(sattr->ia_valid & ATTR_SIZE)) {
2316 pr_warn_once("NFSv4: server %s is incorrectly "
2317 "applying open mode checks to "
2318 "a SETATTR that is not "
2319 "changing file size.\n",
2320 server->nfs_client->cl_hostname);
2321 }
2322 if (state && !(state->state & FMODE_WRITE)) {
2323 err = -EBADF;
2324 if (sattr->ia_valid & ATTR_OPEN)
2325 err = -EACCES;
2326 goto out;
2327 }
2328 }
2329 err = nfs4_handle_exception(server, err, &exception);
2330 } while (exception.retry);
2331out:
2332 return err;
2333}
2334
2335struct nfs4_closedata {
2336 struct inode *inode;
2337 struct nfs4_state *state;
2338 struct nfs_closeargs arg;
2339 struct nfs_closeres res;
2340 struct nfs_fattr fattr;
2341 unsigned long timestamp;
2342 bool roc;
2343 u32 roc_barrier;
2344};
2345
2346static void nfs4_free_closedata(void *data)
2347{
2348 struct nfs4_closedata *calldata = data;
2349 struct nfs4_state_owner *sp = calldata->state->owner;
2350 struct super_block *sb = calldata->state->inode->i_sb;
2351
2352 if (calldata->roc)
2353 pnfs_roc_release(calldata->state->inode);
2354 nfs4_put_open_state(calldata->state);
2355 nfs_free_seqid(calldata->arg.seqid);
2356 nfs4_put_state_owner(sp);
2357 nfs_sb_deactive(sb);
2358 kfree(calldata);
2359}
2360
2361static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2362 fmode_t fmode)
2363{
2364 spin_lock(&state->owner->so_lock);
2365 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2366 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2367 case FMODE_WRITE:
2368 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2369 break;
2370 case FMODE_READ:
2371 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2372 break;
2373 case 0:
2374 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2375 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2376 clear_bit(NFS_OPEN_STATE, &state->flags);
2377 }
2378 spin_unlock(&state->owner->so_lock);
2379}
2380
2381static void nfs4_close_done(struct rpc_task *task, void *data)
2382{
2383 struct nfs4_closedata *calldata = data;
2384 struct nfs4_state *state = calldata->state;
2385 struct nfs_server *server = NFS_SERVER(calldata->inode);
2386
2387 dprintk("%s: begin!\n", __func__);
2388 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2389 return;
2390 /* hmm. we are done with the inode, and in the process of freeing
2391 * the state_owner. we keep this around to process errors
2392 */
2393 switch (task->tk_status) {
2394 case 0:
2395 if (calldata->roc)
2396 pnfs_roc_set_barrier(state->inode,
2397 calldata->roc_barrier);
2398 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2399 renew_lease(server, calldata->timestamp);
2400 nfs4_close_clear_stateid_flags(state,
2401 calldata->arg.fmode);
2402 break;
2403 case -NFS4ERR_STALE_STATEID:
2404 case -NFS4ERR_OLD_STATEID:
2405 case -NFS4ERR_BAD_STATEID:
2406 case -NFS4ERR_EXPIRED:
2407 if (calldata->arg.fmode == 0)
2408 break;
2409 default:
2410 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2411 rpc_restart_call_prepare(task);
2412 }
2413 nfs_release_seqid(calldata->arg.seqid);
2414 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2415 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2416}
2417
2418static void nfs4_close_prepare(struct rpc_task *task, void *data)
2419{
2420 struct nfs4_closedata *calldata = data;
2421 struct nfs4_state *state = calldata->state;
2422 struct inode *inode = calldata->inode;
2423 int call_close = 0;
2424
2425 dprintk("%s: begin!\n", __func__);
2426 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2427 goto out_wait;
2428
2429 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2430 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2431 spin_lock(&state->owner->so_lock);
2432 /* Calculate the change in open mode */
2433 if (state->n_rdwr == 0) {
2434 if (state->n_rdonly == 0) {
2435 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2436 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2437 calldata->arg.fmode &= ~FMODE_READ;
2438 }
2439 if (state->n_wronly == 0) {
2440 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2441 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2442 calldata->arg.fmode &= ~FMODE_WRITE;
2443 }
2444 }
2445 if (!nfs4_valid_open_stateid(state))
2446 call_close = 0;
2447 spin_unlock(&state->owner->so_lock);
2448
2449 if (!call_close) {
2450 /* Note: exit _without_ calling nfs4_close_done */
2451 goto out_no_action;
2452 }
2453
2454 if (calldata->arg.fmode == 0) {
2455 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2456 if (calldata->roc &&
2457 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2458 nfs_release_seqid(calldata->arg.seqid);
2459 goto out_wait;
2460 }
2461 }
2462
2463 nfs_fattr_init(calldata->res.fattr);
2464 calldata->timestamp = jiffies;
2465 if (nfs4_setup_sequence(NFS_SERVER(inode),
2466 &calldata->arg.seq_args,
2467 &calldata->res.seq_res,
2468 task) != 0)
2469 nfs_release_seqid(calldata->arg.seqid);
2470 dprintk("%s: done!\n", __func__);
2471 return;
2472out_no_action:
2473 task->tk_action = NULL;
2474out_wait:
2475 nfs4_sequence_done(task, &calldata->res.seq_res);
2476}
2477
2478static const struct rpc_call_ops nfs4_close_ops = {
2479 .rpc_call_prepare = nfs4_close_prepare,
2480 .rpc_call_done = nfs4_close_done,
2481 .rpc_release = nfs4_free_closedata,
2482};
2483
2484/*
2485 * It is possible for data to be read/written from a mem-mapped file
2486 * after the sys_close call (which hits the vfs layer as a flush).
2487 * This means that we can't safely call nfsv4 close on a file until
2488 * the inode is cleared. This in turn means that we are not good
2489 * NFSv4 citizens - we do not indicate to the server to update the file's
2490 * share state even when we are done with one of the three share
2491 * stateid's in the inode.
2492 *
2493 * NOTE: Caller must be holding the sp->so_owner semaphore!
2494 */
2495int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2496{
2497 struct nfs_server *server = NFS_SERVER(state->inode);
2498 struct nfs4_closedata *calldata;
2499 struct nfs4_state_owner *sp = state->owner;
2500 struct rpc_task *task;
2501 struct rpc_message msg = {
2502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2503 .rpc_cred = state->owner->so_cred,
2504 };
2505 struct rpc_task_setup task_setup_data = {
2506 .rpc_client = server->client,
2507 .rpc_message = &msg,
2508 .callback_ops = &nfs4_close_ops,
2509 .workqueue = nfsiod_workqueue,
2510 .flags = RPC_TASK_ASYNC,
2511 };
2512 int status = -ENOMEM;
2513
2514 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2515 if (calldata == NULL)
2516 goto out;
2517 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2518 calldata->inode = state->inode;
2519 calldata->state = state;
2520 calldata->arg.fh = NFS_FH(state->inode);
2521 calldata->arg.stateid = &state->open_stateid;
2522 /* Serialization for the sequence id */
2523 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2524 if (calldata->arg.seqid == NULL)
2525 goto out_free_calldata;
2526 calldata->arg.fmode = 0;
2527 calldata->arg.bitmask = server->cache_consistency_bitmask;
2528 calldata->res.fattr = &calldata->fattr;
2529 calldata->res.seqid = calldata->arg.seqid;
2530 calldata->res.server = server;
2531 calldata->roc = pnfs_roc(state->inode);
2532 nfs_sb_active(calldata->inode->i_sb);
2533
2534 msg.rpc_argp = &calldata->arg;
2535 msg.rpc_resp = &calldata->res;
2536 task_setup_data.callback_data = calldata;
2537 task = rpc_run_task(&task_setup_data);
2538 if (IS_ERR(task))
2539 return PTR_ERR(task);
2540 status = 0;
2541 if (wait)
2542 status = rpc_wait_for_completion_task(task);
2543 rpc_put_task(task);
2544 return status;
2545out_free_calldata:
2546 kfree(calldata);
2547out:
2548 nfs4_put_open_state(state);
2549 nfs4_put_state_owner(sp);
2550 return status;
2551}
2552
2553static struct inode *
2554nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2555{
2556 struct nfs4_state *state;
2557 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2558
2559 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2560
2561 /* Protect against concurrent sillydeletes */
2562 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
2563
2564 nfs4_label_release_security(label);
2565
2566 if (IS_ERR(state))
2567 return ERR_CAST(state);
2568 return state->inode;
2569}
2570
2571static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2572{
2573 if (ctx->state == NULL)
2574 return;
2575 if (is_sync)
2576 nfs4_close_sync(ctx->state, ctx->mode);
2577 else
2578 nfs4_close_state(ctx->state, ctx->mode);
2579}
2580
2581static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2582{
2583 struct nfs4_server_caps_arg args = {
2584 .fhandle = fhandle,
2585 };
2586 struct nfs4_server_caps_res res = {};
2587 struct rpc_message msg = {
2588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2589 .rpc_argp = &args,
2590 .rpc_resp = &res,
2591 };
2592 int status;
2593
2594 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2595 if (status == 0) {
2596 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2597 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2598 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2599 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2600 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2601 NFS_CAP_CTIME|NFS_CAP_MTIME);
2602 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2603 server->caps |= NFS_CAP_ACLS;
2604 if (res.has_links != 0)
2605 server->caps |= NFS_CAP_HARDLINKS;
2606 if (res.has_symlinks != 0)
2607 server->caps |= NFS_CAP_SYMLINKS;
2608 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2609 server->caps |= NFS_CAP_FILEID;
2610 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2611 server->caps |= NFS_CAP_MODE;
2612 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2613 server->caps |= NFS_CAP_NLINK;
2614 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2615 server->caps |= NFS_CAP_OWNER;
2616 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2617 server->caps |= NFS_CAP_OWNER_GROUP;
2618 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2619 server->caps |= NFS_CAP_ATIME;
2620 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2621 server->caps |= NFS_CAP_CTIME;
2622 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2623 server->caps |= NFS_CAP_MTIME;
2624#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2625 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2626 server->caps |= NFS_CAP_SECURITY_LABEL;
2627#endif
2628 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2629 sizeof(server->attr_bitmask));
2630
2631 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2632 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2633 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2634 }
2635 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2636 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2637 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2638 server->acl_bitmask = res.acl_bitmask;
2639 server->fh_expire_type = res.fh_expire_type;
2640 }
2641
2642 return status;
2643}
2644
2645int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2646{
2647 struct nfs4_exception exception = { };
2648 int err;
2649 do {
2650 err = nfs4_handle_exception(server,
2651 _nfs4_server_capabilities(server, fhandle),
2652 &exception);
2653 } while (exception.retry);
2654 return err;
2655}
2656
2657static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2658 struct nfs_fsinfo *info)
2659{
2660 u32 bitmask[3];
2661 struct nfs4_lookup_root_arg args = {
2662 .bitmask = bitmask,
2663 };
2664 struct nfs4_lookup_res res = {
2665 .server = server,
2666 .fattr = info->fattr,
2667 .fh = fhandle,
2668 };
2669 struct rpc_message msg = {
2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2671 .rpc_argp = &args,
2672 .rpc_resp = &res,
2673 };
2674
2675 bitmask[0] = nfs4_fattr_bitmap[0];
2676 bitmask[1] = nfs4_fattr_bitmap[1];
2677 /*
2678 * Process the label in the upcoming getfattr
2679 */
2680 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2681
2682 nfs_fattr_init(info->fattr);
2683 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2684}
2685
2686static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2687 struct nfs_fsinfo *info)
2688{
2689 struct nfs4_exception exception = { };
2690 int err;
2691 do {
2692 err = _nfs4_lookup_root(server, fhandle, info);
2693 switch (err) {
2694 case 0:
2695 case -NFS4ERR_WRONGSEC:
2696 goto out;
2697 default:
2698 err = nfs4_handle_exception(server, err, &exception);
2699 }
2700 } while (exception.retry);
2701out:
2702 return err;
2703}
2704
2705static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2706 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2707{
2708 struct rpc_auth *auth;
2709 int ret;
2710
2711 auth = rpcauth_create(flavor, server->client);
2712 if (IS_ERR(auth)) {
2713 ret = -EACCES;
2714 goto out;
2715 }
2716 ret = nfs4_lookup_root(server, fhandle, info);
2717out:
2718 return ret;
2719}
2720
2721/*
2722 * Retry pseudoroot lookup with various security flavors. We do this when:
2723 *
2724 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2725 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2726 *
2727 * Returns zero on success, or a negative NFS4ERR value, or a
2728 * negative errno value.
2729 */
2730static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2731 struct nfs_fsinfo *info)
2732{
2733 /* Per 3530bis 15.33.5 */
2734 static const rpc_authflavor_t flav_array[] = {
2735 RPC_AUTH_GSS_KRB5P,
2736 RPC_AUTH_GSS_KRB5I,
2737 RPC_AUTH_GSS_KRB5,
2738 RPC_AUTH_UNIX, /* courtesy */
2739 RPC_AUTH_NULL,
2740 };
2741 int status = -EPERM;
2742 size_t i;
2743
2744 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2745 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2746 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2747 continue;
2748 break;
2749 }
2750
2751 /*
2752 * -EACCESS could mean that the user doesn't have correct permissions
2753 * to access the mount. It could also mean that we tried to mount
2754 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2755 * existing mount programs don't handle -EACCES very well so it should
2756 * be mapped to -EPERM instead.
2757 */
2758 if (status == -EACCES)
2759 status = -EPERM;
2760 return status;
2761}
2762
2763static int nfs4_do_find_root_sec(struct nfs_server *server,
2764 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2765{
2766 int mv = server->nfs_client->cl_minorversion;
2767 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2768}
2769
2770/**
2771 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2772 * @server: initialized nfs_server handle
2773 * @fhandle: we fill in the pseudo-fs root file handle
2774 * @info: we fill in an FSINFO struct
2775 *
2776 * Returns zero on success, or a negative errno.
2777 */
2778int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2779 struct nfs_fsinfo *info)
2780{
2781 int status;
2782
2783 status = nfs4_lookup_root(server, fhandle, info);
2784 if ((status == -NFS4ERR_WRONGSEC) &&
2785 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2786 status = nfs4_do_find_root_sec(server, fhandle, info);
2787
2788 if (status == 0)
2789 status = nfs4_server_capabilities(server, fhandle);
2790 if (status == 0)
2791 status = nfs4_do_fsinfo(server, fhandle, info);
2792
2793 return nfs4_map_errors(status);
2794}
2795
2796static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2797 struct nfs_fsinfo *info)
2798{
2799 int error;
2800 struct nfs_fattr *fattr = info->fattr;
2801 struct nfs4_label *label = NULL;
2802
2803 error = nfs4_server_capabilities(server, mntfh);
2804 if (error < 0) {
2805 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2806 return error;
2807 }
2808
2809 label = nfs4_label_alloc(server, GFP_KERNEL);
2810 if (IS_ERR(label))
2811 return PTR_ERR(label);
2812
2813 error = nfs4_proc_getattr(server, mntfh, fattr, label);
2814 if (error < 0) {
2815 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2816 goto err_free_label;
2817 }
2818
2819 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2820 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2821 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2822
2823err_free_label:
2824 nfs4_label_free(label);
2825
2826 return error;
2827}
2828
2829/*
2830 * Get locations and (maybe) other attributes of a referral.
2831 * Note that we'll actually follow the referral later when
2832 * we detect fsid mismatch in inode revalidation
2833 */
2834static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2835 const struct qstr *name, struct nfs_fattr *fattr,
2836 struct nfs_fh *fhandle)
2837{
2838 int status = -ENOMEM;
2839 struct page *page = NULL;
2840 struct nfs4_fs_locations *locations = NULL;
2841
2842 page = alloc_page(GFP_KERNEL);
2843 if (page == NULL)
2844 goto out;
2845 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2846 if (locations == NULL)
2847 goto out;
2848
2849 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2850 if (status != 0)
2851 goto out;
2852 /* Make sure server returned a different fsid for the referral */
2853 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2854 dprintk("%s: server did not return a different fsid for"
2855 " a referral at %s\n", __func__, name->name);
2856 status = -EIO;
2857 goto out;
2858 }
2859 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2860 nfs_fixup_referral_attributes(&locations->fattr);
2861
2862 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2863 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2864 memset(fhandle, 0, sizeof(struct nfs_fh));
2865out:
2866 if (page)
2867 __free_page(page);
2868 kfree(locations);
2869 return status;
2870}
2871
2872static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2873 struct nfs_fattr *fattr, struct nfs4_label *label)
2874{
2875 struct nfs4_getattr_arg args = {
2876 .fh = fhandle,
2877 .bitmask = server->attr_bitmask,
2878 };
2879 struct nfs4_getattr_res res = {
2880 .fattr = fattr,
2881 .label = label,
2882 .server = server,
2883 };
2884 struct rpc_message msg = {
2885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2886 .rpc_argp = &args,
2887 .rpc_resp = &res,
2888 };
2889
2890 args.bitmask = nfs4_bitmask(server, label);
2891
2892 nfs_fattr_init(fattr);
2893 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2894}
2895
2896static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2897 struct nfs_fattr *fattr, struct nfs4_label *label)
2898{
2899 struct nfs4_exception exception = { };
2900 int err;
2901 do {
2902 err = nfs4_handle_exception(server,
2903 _nfs4_proc_getattr(server, fhandle, fattr, label),
2904 &exception);
2905 } while (exception.retry);
2906 return err;
2907}
2908
2909/*
2910 * The file is not closed if it is opened due to the a request to change
2911 * the size of the file. The open call will not be needed once the
2912 * VFS layer lookup-intents are implemented.
2913 *
2914 * Close is called when the inode is destroyed.
2915 * If we haven't opened the file for O_WRONLY, we
2916 * need to in the size_change case to obtain a stateid.
2917 *
2918 * Got race?
2919 * Because OPEN is always done by name in nfsv4, it is
2920 * possible that we opened a different file by the same
2921 * name. We can recognize this race condition, but we
2922 * can't do anything about it besides returning an error.
2923 *
2924 * This will be fixed with VFS changes (lookup-intent).
2925 */
2926static int
2927nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2928 struct iattr *sattr)
2929{
2930 struct inode *inode = dentry->d_inode;
2931 struct rpc_cred *cred = NULL;
2932 struct nfs4_state *state = NULL;
2933 struct nfs4_label *label = NULL;
2934 int status;
2935
2936 if (pnfs_ld_layoutret_on_setattr(inode))
2937 pnfs_commit_and_return_layout(inode);
2938
2939 nfs_fattr_init(fattr);
2940
2941 /* Deal with open(O_TRUNC) */
2942 if (sattr->ia_valid & ATTR_OPEN)
2943 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2944
2945 /* Optimization: if the end result is no change, don't RPC */
2946 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2947 return 0;
2948
2949 /* Search for an existing open(O_WRITE) file */
2950 if (sattr->ia_valid & ATTR_FILE) {
2951 struct nfs_open_context *ctx;
2952
2953 ctx = nfs_file_open_context(sattr->ia_file);
2954 if (ctx) {
2955 cred = ctx->cred;
2956 state = ctx->state;
2957 }
2958 }
2959
2960 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2961 if (IS_ERR(label))
2962 return PTR_ERR(label);
2963
2964 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
2965 if (status == 0) {
2966 nfs_setattr_update_inode(inode, sattr);
2967 nfs_setsecurity(inode, fattr, label);
2968 }
2969 nfs4_label_free(label);
2970 return status;
2971}
2972
2973static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2974 const struct qstr *name, struct nfs_fh *fhandle,
2975 struct nfs_fattr *fattr, struct nfs4_label *label)
2976{
2977 struct nfs_server *server = NFS_SERVER(dir);
2978 int status;
2979 struct nfs4_lookup_arg args = {
2980 .bitmask = server->attr_bitmask,
2981 .dir_fh = NFS_FH(dir),
2982 .name = name,
2983 };
2984 struct nfs4_lookup_res res = {
2985 .server = server,
2986 .fattr = fattr,
2987 .label = label,
2988 .fh = fhandle,
2989 };
2990 struct rpc_message msg = {
2991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2992 .rpc_argp = &args,
2993 .rpc_resp = &res,
2994 };
2995
2996 args.bitmask = nfs4_bitmask(server, label);
2997
2998 nfs_fattr_init(fattr);
2999
3000 dprintk("NFS call lookup %s\n", name->name);
3001 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3002 dprintk("NFS reply lookup: %d\n", status);
3003 return status;
3004}
3005
3006static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3007{
3008 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3009 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3010 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3011 fattr->nlink = 2;
3012}
3013
3014static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3015 struct qstr *name, struct nfs_fh *fhandle,
3016 struct nfs_fattr *fattr, struct nfs4_label *label)
3017{
3018 struct nfs4_exception exception = { };
3019 struct rpc_clnt *client = *clnt;
3020 int err;
3021 do {
3022 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3023 switch (err) {
3024 case -NFS4ERR_BADNAME:
3025 err = -ENOENT;
3026 goto out;
3027 case -NFS4ERR_MOVED:
3028 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3029 goto out;
3030 case -NFS4ERR_WRONGSEC:
3031 err = -EPERM;
3032 if (client != *clnt)
3033 goto out;
3034
3035 client = nfs4_create_sec_client(client, dir, name);
3036 if (IS_ERR(client))
3037 return PTR_ERR(client);
3038
3039 exception.retry = 1;
3040 break;
3041 default:
3042 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3043 }
3044 } while (exception.retry);
3045
3046out:
3047 if (err == 0)
3048 *clnt = client;
3049 else if (client != *clnt)
3050 rpc_shutdown_client(client);
3051
3052 return err;
3053}
3054
3055static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3056 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3057 struct nfs4_label *label)
3058{
3059 int status;
3060 struct rpc_clnt *client = NFS_CLIENT(dir);
3061
3062 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3063 if (client != NFS_CLIENT(dir)) {
3064 rpc_shutdown_client(client);
3065 nfs_fixup_secinfo_attributes(fattr);
3066 }
3067 return status;
3068}
3069
3070struct rpc_clnt *
3071nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3072 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3073{
3074 int status;
3075 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3076
3077 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3078 if (status < 0) {
3079 rpc_shutdown_client(client);
3080 return ERR_PTR(status);
3081 }
3082 return client;
3083}
3084
3085static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3086{
3087 struct nfs_server *server = NFS_SERVER(inode);
3088 struct nfs4_accessargs args = {
3089 .fh = NFS_FH(inode),
3090 .bitmask = server->cache_consistency_bitmask,
3091 };
3092 struct nfs4_accessres res = {
3093 .server = server,
3094 };
3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3097 .rpc_argp = &args,
3098 .rpc_resp = &res,
3099 .rpc_cred = entry->cred,
3100 };
3101 int mode = entry->mask;
3102 int status = 0;
3103
3104 /*
3105 * Determine which access bits we want to ask for...
3106 */
3107 if (mode & MAY_READ)
3108 args.access |= NFS4_ACCESS_READ;
3109 if (S_ISDIR(inode->i_mode)) {
3110 if (mode & MAY_WRITE)
3111 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3112 if (mode & MAY_EXEC)
3113 args.access |= NFS4_ACCESS_LOOKUP;
3114 } else {
3115 if (mode & MAY_WRITE)
3116 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3117 if (mode & MAY_EXEC)
3118 args.access |= NFS4_ACCESS_EXECUTE;
3119 }
3120
3121 res.fattr = nfs_alloc_fattr();
3122 if (res.fattr == NULL)
3123 return -ENOMEM;
3124
3125 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3126 if (!status) {
3127 nfs_access_set_mask(entry, res.access);
3128 nfs_refresh_inode(inode, res.fattr);
3129 }
3130 nfs_free_fattr(res.fattr);
3131 return status;
3132}
3133
3134static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3135{
3136 struct nfs4_exception exception = { };
3137 int err;
3138 do {
3139 err = nfs4_handle_exception(NFS_SERVER(inode),
3140 _nfs4_proc_access(inode, entry),
3141 &exception);
3142 } while (exception.retry);
3143 return err;
3144}
3145
3146/*
3147 * TODO: For the time being, we don't try to get any attributes
3148 * along with any of the zero-copy operations READ, READDIR,
3149 * READLINK, WRITE.
3150 *
3151 * In the case of the first three, we want to put the GETATTR
3152 * after the read-type operation -- this is because it is hard
3153 * to predict the length of a GETATTR response in v4, and thus
3154 * align the READ data correctly. This means that the GETATTR
3155 * may end up partially falling into the page cache, and we should
3156 * shift it into the 'tail' of the xdr_buf before processing.
3157 * To do this efficiently, we need to know the total length
3158 * of data received, which doesn't seem to be available outside
3159 * of the RPC layer.
3160 *
3161 * In the case of WRITE, we also want to put the GETATTR after
3162 * the operation -- in this case because we want to make sure
3163 * we get the post-operation mtime and size.
3164 *
3165 * Both of these changes to the XDR layer would in fact be quite
3166 * minor, but I decided to leave them for a subsequent patch.
3167 */
3168static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3169 unsigned int pgbase, unsigned int pglen)
3170{
3171 struct nfs4_readlink args = {
3172 .fh = NFS_FH(inode),
3173 .pgbase = pgbase,
3174 .pglen = pglen,
3175 .pages = &page,
3176 };
3177 struct nfs4_readlink_res res;
3178 struct rpc_message msg = {
3179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3180 .rpc_argp = &args,
3181 .rpc_resp = &res,
3182 };
3183
3184 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3185}
3186
3187static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3188 unsigned int pgbase, unsigned int pglen)
3189{
3190 struct nfs4_exception exception = { };
3191 int err;
3192 do {
3193 err = nfs4_handle_exception(NFS_SERVER(inode),
3194 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3195 &exception);
3196 } while (exception.retry);
3197 return err;
3198}
3199
3200/*
3201 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3202 */
3203static int
3204nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3205 int flags)
3206{
3207 struct nfs4_label l, *ilabel = NULL;
3208 struct nfs_open_context *ctx;
3209 struct nfs4_state *state;
3210 int status = 0;
3211
3212 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3213 if (IS_ERR(ctx))
3214 return PTR_ERR(ctx);
3215
3216 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3217
3218 sattr->ia_mode &= ~current_umask();
3219 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
3220 if (IS_ERR(state)) {
3221 status = PTR_ERR(state);
3222 goto out;
3223 }
3224out:
3225 nfs4_label_release_security(ilabel);
3226 put_nfs_open_context(ctx);
3227 return status;
3228}
3229
3230static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3231{
3232 struct nfs_server *server = NFS_SERVER(dir);
3233 struct nfs_removeargs args = {
3234 .fh = NFS_FH(dir),
3235 .name = *name,
3236 };
3237 struct nfs_removeres res = {
3238 .server = server,
3239 };
3240 struct rpc_message msg = {
3241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3242 .rpc_argp = &args,
3243 .rpc_resp = &res,
3244 };
3245 int status;
3246
3247 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3248 if (status == 0)
3249 update_changeattr(dir, &res.cinfo);
3250 return status;
3251}
3252
3253static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3254{
3255 struct nfs4_exception exception = { };
3256 int err;
3257 do {
3258 err = nfs4_handle_exception(NFS_SERVER(dir),
3259 _nfs4_proc_remove(dir, name),
3260 &exception);
3261 } while (exception.retry);
3262 return err;
3263}
3264
3265static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3266{
3267 struct nfs_server *server = NFS_SERVER(dir);
3268 struct nfs_removeargs *args = msg->rpc_argp;
3269 struct nfs_removeres *res = msg->rpc_resp;
3270
3271 res->server = server;
3272 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3273 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3274
3275 nfs_fattr_init(res->dir_attr);
3276}
3277
3278static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3279{
3280 nfs4_setup_sequence(NFS_SERVER(data->dir),
3281 &data->args.seq_args,
3282 &data->res.seq_res,
3283 task);
3284}
3285
3286static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3287{
3288 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3289
3290 if (!nfs4_sequence_done(task, &res->seq_res))
3291 return 0;
3292 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3293 return 0;
3294 update_changeattr(dir, &res->cinfo);
3295 return 1;
3296}
3297
3298static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3299{
3300 struct nfs_server *server = NFS_SERVER(dir);
3301 struct nfs_renameargs *arg = msg->rpc_argp;
3302 struct nfs_renameres *res = msg->rpc_resp;
3303
3304 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3305 res->server = server;
3306 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3307}
3308
3309static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3310{
3311 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3312 &data->args.seq_args,
3313 &data->res.seq_res,
3314 task);
3315}
3316
3317static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3318 struct inode *new_dir)
3319{
3320 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3321
3322 if (!nfs4_sequence_done(task, &res->seq_res))
3323 return 0;
3324 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3325 return 0;
3326
3327 update_changeattr(old_dir, &res->old_cinfo);
3328 update_changeattr(new_dir, &res->new_cinfo);
3329 return 1;
3330}
3331
3332static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3333 struct inode *new_dir, struct qstr *new_name)
3334{
3335 struct nfs_server *server = NFS_SERVER(old_dir);
3336 struct nfs_renameargs arg = {
3337 .old_dir = NFS_FH(old_dir),
3338 .new_dir = NFS_FH(new_dir),
3339 .old_name = old_name,
3340 .new_name = new_name,
3341 };
3342 struct nfs_renameres res = {
3343 .server = server,
3344 };
3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3347 .rpc_argp = &arg,
3348 .rpc_resp = &res,
3349 };
3350 int status = -ENOMEM;
3351
3352 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3353 if (!status) {
3354 update_changeattr(old_dir, &res.old_cinfo);
3355 update_changeattr(new_dir, &res.new_cinfo);
3356 }
3357 return status;
3358}
3359
3360static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3361 struct inode *new_dir, struct qstr *new_name)
3362{
3363 struct nfs4_exception exception = { };
3364 int err;
3365 do {
3366 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3367 _nfs4_proc_rename(old_dir, old_name,
3368 new_dir, new_name),
3369 &exception);
3370 } while (exception.retry);
3371 return err;
3372}
3373
3374static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3375{
3376 struct nfs_server *server = NFS_SERVER(inode);
3377 struct nfs4_link_arg arg = {
3378 .fh = NFS_FH(inode),
3379 .dir_fh = NFS_FH(dir),
3380 .name = name,
3381 .bitmask = server->attr_bitmask,
3382 };
3383 struct nfs4_link_res res = {
3384 .server = server,
3385 .label = NULL,
3386 };
3387 struct rpc_message msg = {
3388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3389 .rpc_argp = &arg,
3390 .rpc_resp = &res,
3391 };
3392 int status = -ENOMEM;
3393
3394 res.fattr = nfs_alloc_fattr();
3395 if (res.fattr == NULL)
3396 goto out;
3397
3398 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3399 if (IS_ERR(res.label)) {
3400 status = PTR_ERR(res.label);
3401 goto out;
3402 }
3403 arg.bitmask = nfs4_bitmask(server, res.label);
3404
3405 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3406 if (!status) {
3407 update_changeattr(dir, &res.cinfo);
3408 status = nfs_post_op_update_inode(inode, res.fattr);
3409 if (!status)
3410 nfs_setsecurity(inode, res.fattr, res.label);
3411 }
3412
3413
3414 nfs4_label_free(res.label);
3415
3416out:
3417 nfs_free_fattr(res.fattr);
3418 return status;
3419}
3420
3421static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3422{
3423 struct nfs4_exception exception = { };
3424 int err;
3425 do {
3426 err = nfs4_handle_exception(NFS_SERVER(inode),
3427 _nfs4_proc_link(inode, dir, name),
3428 &exception);
3429 } while (exception.retry);
3430 return err;
3431}
3432
3433struct nfs4_createdata {
3434 struct rpc_message msg;
3435 struct nfs4_create_arg arg;
3436 struct nfs4_create_res res;
3437 struct nfs_fh fh;
3438 struct nfs_fattr fattr;
3439 struct nfs4_label *label;
3440};
3441
3442static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3443 struct qstr *name, struct iattr *sattr, u32 ftype)
3444{
3445 struct nfs4_createdata *data;
3446
3447 data = kzalloc(sizeof(*data), GFP_KERNEL);
3448 if (data != NULL) {
3449 struct nfs_server *server = NFS_SERVER(dir);
3450
3451 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3452 if (IS_ERR(data->label))
3453 goto out_free;
3454
3455 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3456 data->msg.rpc_argp = &data->arg;
3457 data->msg.rpc_resp = &data->res;
3458 data->arg.dir_fh = NFS_FH(dir);
3459 data->arg.server = server;
3460 data->arg.name = name;
3461 data->arg.attrs = sattr;
3462 data->arg.ftype = ftype;
3463 data->arg.bitmask = nfs4_bitmask(server, data->label);
3464 data->res.server = server;
3465 data->res.fh = &data->fh;
3466 data->res.fattr = &data->fattr;
3467 data->res.label = data->label;
3468 nfs_fattr_init(data->res.fattr);
3469 }
3470 return data;
3471out_free:
3472 kfree(data);
3473 return NULL;
3474}
3475
3476static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3477{
3478 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3479 &data->arg.seq_args, &data->res.seq_res, 1);
3480 if (status == 0) {
3481 update_changeattr(dir, &data->res.dir_cinfo);
3482 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3483 }
3484 return status;
3485}
3486
3487static void nfs4_free_createdata(struct nfs4_createdata *data)
3488{
3489 nfs4_label_free(data->label);
3490 kfree(data);
3491}
3492
3493static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3494 struct page *page, unsigned int len, struct iattr *sattr,
3495 struct nfs4_label *label)
3496{
3497 struct nfs4_createdata *data;
3498 int status = -ENAMETOOLONG;
3499
3500 if (len > NFS4_MAXPATHLEN)
3501 goto out;
3502
3503 status = -ENOMEM;
3504 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3505 if (data == NULL)
3506 goto out;
3507
3508 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3509 data->arg.u.symlink.pages = &page;
3510 data->arg.u.symlink.len = len;
3511 data->arg.label = label;
3512
3513 status = nfs4_do_create(dir, dentry, data);
3514
3515 nfs4_free_createdata(data);
3516out:
3517 return status;
3518}
3519
3520static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3521 struct page *page, unsigned int len, struct iattr *sattr)
3522{
3523 struct nfs4_exception exception = { };
3524 struct nfs4_label l, *label = NULL;
3525 int err;
3526
3527 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3528
3529 do {
3530 err = nfs4_handle_exception(NFS_SERVER(dir),
3531 _nfs4_proc_symlink(dir, dentry, page,
3532 len, sattr, label),
3533 &exception);
3534 } while (exception.retry);
3535
3536 nfs4_label_release_security(label);
3537 return err;
3538}
3539
3540static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3541 struct iattr *sattr, struct nfs4_label *label)
3542{
3543 struct nfs4_createdata *data;
3544 int status = -ENOMEM;
3545
3546 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3547 if (data == NULL)
3548 goto out;
3549
3550 data->arg.label = label;
3551 status = nfs4_do_create(dir, dentry, data);
3552
3553 nfs4_free_createdata(data);
3554out:
3555 return status;
3556}
3557
3558static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3559 struct iattr *sattr)
3560{
3561 struct nfs4_exception exception = { };
3562 struct nfs4_label l, *label = NULL;
3563 int err;
3564
3565 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3566
3567 sattr->ia_mode &= ~current_umask();
3568 do {
3569 err = nfs4_handle_exception(NFS_SERVER(dir),
3570 _nfs4_proc_mkdir(dir, dentry, sattr, label),
3571 &exception);
3572 } while (exception.retry);
3573 nfs4_label_release_security(label);
3574
3575 return err;
3576}
3577
3578static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3579 u64 cookie, struct page **pages, unsigned int count, int plus)
3580{
3581 struct inode *dir = dentry->d_inode;
3582 struct nfs4_readdir_arg args = {
3583 .fh = NFS_FH(dir),
3584 .pages = pages,
3585 .pgbase = 0,
3586 .count = count,
3587 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3588 .plus = plus,
3589 };
3590 struct nfs4_readdir_res res;
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3593 .rpc_argp = &args,
3594 .rpc_resp = &res,
3595 .rpc_cred = cred,
3596 };
3597 int status;
3598
3599 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3600 dentry->d_parent->d_name.name,
3601 dentry->d_name.name,
3602 (unsigned long long)cookie);
3603 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3604 res.pgbase = args.pgbase;
3605 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3606 if (status >= 0) {
3607 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3608 status += args.pgbase;
3609 }
3610
3611 nfs_invalidate_atime(dir);
3612
3613 dprintk("%s: returns %d\n", __func__, status);
3614 return status;
3615}
3616
3617static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3618 u64 cookie, struct page **pages, unsigned int count, int plus)
3619{
3620 struct nfs4_exception exception = { };
3621 int err;
3622 do {
3623 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3624 _nfs4_proc_readdir(dentry, cred, cookie,
3625 pages, count, plus),
3626 &exception);
3627 } while (exception.retry);
3628 return err;
3629}
3630
3631static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3632 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3633{
3634 struct nfs4_createdata *data;
3635 int mode = sattr->ia_mode;
3636 int status = -ENOMEM;
3637
3638 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3639 if (data == NULL)
3640 goto out;
3641
3642 if (S_ISFIFO(mode))
3643 data->arg.ftype = NF4FIFO;
3644 else if (S_ISBLK(mode)) {
3645 data->arg.ftype = NF4BLK;
3646 data->arg.u.device.specdata1 = MAJOR(rdev);
3647 data->arg.u.device.specdata2 = MINOR(rdev);
3648 }
3649 else if (S_ISCHR(mode)) {
3650 data->arg.ftype = NF4CHR;
3651 data->arg.u.device.specdata1 = MAJOR(rdev);
3652 data->arg.u.device.specdata2 = MINOR(rdev);
3653 } else if (!S_ISSOCK(mode)) {
3654 status = -EINVAL;
3655 goto out_free;
3656 }
3657
3658 data->arg.label = label;
3659 status = nfs4_do_create(dir, dentry, data);
3660out_free:
3661 nfs4_free_createdata(data);
3662out:
3663 return status;
3664}
3665
3666static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3667 struct iattr *sattr, dev_t rdev)
3668{
3669 struct nfs4_exception exception = { };
3670 struct nfs4_label l, *label = NULL;
3671 int err;
3672
3673 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3674
3675 sattr->ia_mode &= ~current_umask();
3676 do {
3677 err = nfs4_handle_exception(NFS_SERVER(dir),
3678 _nfs4_proc_mknod(dir, dentry, sattr, label, rdev),
3679 &exception);
3680 } while (exception.retry);
3681
3682 nfs4_label_release_security(label);
3683
3684 return err;
3685}
3686
3687static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3688 struct nfs_fsstat *fsstat)
3689{
3690 struct nfs4_statfs_arg args = {
3691 .fh = fhandle,
3692 .bitmask = server->attr_bitmask,
3693 };
3694 struct nfs4_statfs_res res = {
3695 .fsstat = fsstat,
3696 };
3697 struct rpc_message msg = {
3698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3699 .rpc_argp = &args,
3700 .rpc_resp = &res,
3701 };
3702
3703 nfs_fattr_init(fsstat->fattr);
3704 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3705}
3706
3707static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3708{
3709 struct nfs4_exception exception = { };
3710 int err;
3711 do {
3712 err = nfs4_handle_exception(server,
3713 _nfs4_proc_statfs(server, fhandle, fsstat),
3714 &exception);
3715 } while (exception.retry);
3716 return err;
3717}
3718
3719static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3720 struct nfs_fsinfo *fsinfo)
3721{
3722 struct nfs4_fsinfo_arg args = {
3723 .fh = fhandle,
3724 .bitmask = server->attr_bitmask,
3725 };
3726 struct nfs4_fsinfo_res res = {
3727 .fsinfo = fsinfo,
3728 };
3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3731 .rpc_argp = &args,
3732 .rpc_resp = &res,
3733 };
3734
3735 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3736}
3737
3738static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3739{
3740 struct nfs4_exception exception = { };
3741 unsigned long now = jiffies;
3742 int err;
3743
3744 do {
3745 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3746 if (err == 0) {
3747 struct nfs_client *clp = server->nfs_client;
3748
3749 spin_lock(&clp->cl_lock);
3750 clp->cl_lease_time = fsinfo->lease_time * HZ;
3751 clp->cl_last_renewal = now;
3752 spin_unlock(&clp->cl_lock);
3753 break;
3754 }
3755 err = nfs4_handle_exception(server, err, &exception);
3756 } while (exception.retry);
3757 return err;
3758}
3759
3760static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3761{
3762 int error;
3763
3764 nfs_fattr_init(fsinfo->fattr);
3765 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3766 if (error == 0) {
3767 /* block layout checks this! */
3768 server->pnfs_blksize = fsinfo->blksize;
3769 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3770 }
3771
3772 return error;
3773}
3774
3775static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3776 struct nfs_pathconf *pathconf)
3777{
3778 struct nfs4_pathconf_arg args = {
3779 .fh = fhandle,
3780 .bitmask = server->attr_bitmask,
3781 };
3782 struct nfs4_pathconf_res res = {
3783 .pathconf = pathconf,
3784 };
3785 struct rpc_message msg = {
3786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3787 .rpc_argp = &args,
3788 .rpc_resp = &res,
3789 };
3790
3791 /* None of the pathconf attributes are mandatory to implement */
3792 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3793 memset(pathconf, 0, sizeof(*pathconf));
3794 return 0;
3795 }
3796
3797 nfs_fattr_init(pathconf->fattr);
3798 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3799}
3800
3801static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3802 struct nfs_pathconf *pathconf)
3803{
3804 struct nfs4_exception exception = { };
3805 int err;
3806
3807 do {
3808 err = nfs4_handle_exception(server,
3809 _nfs4_proc_pathconf(server, fhandle, pathconf),
3810 &exception);
3811 } while (exception.retry);
3812 return err;
3813}
3814
3815int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3816 const struct nfs_open_context *ctx,
3817 const struct nfs_lock_context *l_ctx,
3818 fmode_t fmode)
3819{
3820 const struct nfs_lockowner *lockowner = NULL;
3821
3822 if (l_ctx != NULL)
3823 lockowner = &l_ctx->lockowner;
3824 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3825}
3826EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3827
3828static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3829 const struct nfs_open_context *ctx,
3830 const struct nfs_lock_context *l_ctx,
3831 fmode_t fmode)
3832{
3833 nfs4_stateid current_stateid;
3834
3835 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3836 return false;
3837 return nfs4_stateid_match(stateid, &current_stateid);
3838}
3839
3840static bool nfs4_error_stateid_expired(int err)
3841{
3842 switch (err) {
3843 case -NFS4ERR_DELEG_REVOKED:
3844 case -NFS4ERR_ADMIN_REVOKED:
3845 case -NFS4ERR_BAD_STATEID:
3846 case -NFS4ERR_STALE_STATEID:
3847 case -NFS4ERR_OLD_STATEID:
3848 case -NFS4ERR_OPENMODE:
3849 case -NFS4ERR_EXPIRED:
3850 return true;
3851 }
3852 return false;
3853}
3854
3855void __nfs4_read_done_cb(struct nfs_read_data *data)
3856{
3857 nfs_invalidate_atime(data->header->inode);
3858}
3859
3860static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3861{
3862 struct nfs_server *server = NFS_SERVER(data->header->inode);
3863
3864 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3865 rpc_restart_call_prepare(task);
3866 return -EAGAIN;
3867 }
3868
3869 __nfs4_read_done_cb(data);
3870 if (task->tk_status > 0)
3871 renew_lease(server, data->timestamp);
3872 return 0;
3873}
3874
3875static bool nfs4_read_stateid_changed(struct rpc_task *task,
3876 struct nfs_readargs *args)
3877{
3878
3879 if (!nfs4_error_stateid_expired(task->tk_status) ||
3880 nfs4_stateid_is_current(&args->stateid,
3881 args->context,
3882 args->lock_context,
3883 FMODE_READ))
3884 return false;
3885 rpc_restart_call_prepare(task);
3886 return true;
3887}
3888
3889static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3890{
3891
3892 dprintk("--> %s\n", __func__);
3893
3894 if (!nfs4_sequence_done(task, &data->res.seq_res))
3895 return -EAGAIN;
3896 if (nfs4_read_stateid_changed(task, &data->args))
3897 return -EAGAIN;
3898 return data->read_done_cb ? data->read_done_cb(task, data) :
3899 nfs4_read_done_cb(task, data);
3900}
3901
3902static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3903{
3904 data->timestamp = jiffies;
3905 data->read_done_cb = nfs4_read_done_cb;
3906 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3907 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3908}
3909
3910static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3911{
3912 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3913 &data->args.seq_args,
3914 &data->res.seq_res,
3915 task))
3916 return;
3917 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3918 data->args.lock_context, FMODE_READ);
3919}
3920
3921static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3922{
3923 struct inode *inode = data->header->inode;
3924
3925 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3926 rpc_restart_call_prepare(task);
3927 return -EAGAIN;
3928 }
3929 if (task->tk_status >= 0) {
3930 renew_lease(NFS_SERVER(inode), data->timestamp);
3931 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3932 }
3933 return 0;
3934}
3935
3936static bool nfs4_write_stateid_changed(struct rpc_task *task,
3937 struct nfs_writeargs *args)
3938{
3939
3940 if (!nfs4_error_stateid_expired(task->tk_status) ||
3941 nfs4_stateid_is_current(&args->stateid,
3942 args->context,
3943 args->lock_context,
3944 FMODE_WRITE))
3945 return false;
3946 rpc_restart_call_prepare(task);
3947 return true;
3948}
3949
3950static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3951{
3952 if (!nfs4_sequence_done(task, &data->res.seq_res))
3953 return -EAGAIN;
3954 if (nfs4_write_stateid_changed(task, &data->args))
3955 return -EAGAIN;
3956 return data->write_done_cb ? data->write_done_cb(task, data) :
3957 nfs4_write_done_cb(task, data);
3958}
3959
3960static
3961bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3962{
3963 const struct nfs_pgio_header *hdr = data->header;
3964
3965 /* Don't request attributes for pNFS or O_DIRECT writes */
3966 if (data->ds_clp != NULL || hdr->dreq != NULL)
3967 return false;
3968 /* Otherwise, request attributes if and only if we don't hold
3969 * a delegation
3970 */
3971 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3972}
3973
3974static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3975{
3976 struct nfs_server *server = NFS_SERVER(data->header->inode);
3977
3978 if (!nfs4_write_need_cache_consistency_data(data)) {
3979 data->args.bitmask = NULL;
3980 data->res.fattr = NULL;
3981 } else
3982 data->args.bitmask = server->cache_consistency_bitmask;
3983
3984 if (!data->write_done_cb)
3985 data->write_done_cb = nfs4_write_done_cb;
3986 data->res.server = server;
3987 data->timestamp = jiffies;
3988
3989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3990 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3991}
3992
3993static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3994{
3995 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3996 &data->args.seq_args,
3997 &data->res.seq_res,
3998 task))
3999 return;
4000 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4001 data->args.lock_context, FMODE_WRITE);
4002}
4003
4004static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4005{
4006 nfs4_setup_sequence(NFS_SERVER(data->inode),
4007 &data->args.seq_args,
4008 &data->res.seq_res,
4009 task);
4010}
4011
4012static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4013{
4014 struct inode *inode = data->inode;
4015
4016 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4017 rpc_restart_call_prepare(task);
4018 return -EAGAIN;
4019 }
4020 return 0;
4021}
4022
4023static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4024{
4025 if (!nfs4_sequence_done(task, &data->res.seq_res))
4026 return -EAGAIN;
4027 return data->commit_done_cb(task, data);
4028}
4029
4030static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4031{
4032 struct nfs_server *server = NFS_SERVER(data->inode);
4033
4034 if (data->commit_done_cb == NULL)
4035 data->commit_done_cb = nfs4_commit_done_cb;
4036 data->res.server = server;
4037 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4038 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4039}
4040
4041struct nfs4_renewdata {
4042 struct nfs_client *client;
4043 unsigned long timestamp;
4044};
4045
4046/*
4047 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4048 * standalone procedure for queueing an asynchronous RENEW.
4049 */
4050static void nfs4_renew_release(void *calldata)
4051{
4052 struct nfs4_renewdata *data = calldata;
4053 struct nfs_client *clp = data->client;
4054
4055 if (atomic_read(&clp->cl_count) > 1)
4056 nfs4_schedule_state_renewal(clp);
4057 nfs_put_client(clp);
4058 kfree(data);
4059}
4060
4061static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4062{
4063 struct nfs4_renewdata *data = calldata;
4064 struct nfs_client *clp = data->client;
4065 unsigned long timestamp = data->timestamp;
4066
4067 if (task->tk_status < 0) {
4068 /* Unless we're shutting down, schedule state recovery! */
4069 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4070 return;
4071 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4072 nfs4_schedule_lease_recovery(clp);
4073 return;
4074 }
4075 nfs4_schedule_path_down_recovery(clp);
4076 }
4077 do_renew_lease(clp, timestamp);
4078}
4079
4080static const struct rpc_call_ops nfs4_renew_ops = {
4081 .rpc_call_done = nfs4_renew_done,
4082 .rpc_release = nfs4_renew_release,
4083};
4084
4085static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4086{
4087 struct rpc_message msg = {
4088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4089 .rpc_argp = clp,
4090 .rpc_cred = cred,
4091 };
4092 struct nfs4_renewdata *data;
4093
4094 if (renew_flags == 0)
4095 return 0;
4096 if (!atomic_inc_not_zero(&clp->cl_count))
4097 return -EIO;
4098 data = kmalloc(sizeof(*data), GFP_NOFS);
4099 if (data == NULL)
4100 return -ENOMEM;
4101 data->client = clp;
4102 data->timestamp = jiffies;
4103 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4104 &nfs4_renew_ops, data);
4105}
4106
4107static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4108{
4109 struct rpc_message msg = {
4110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4111 .rpc_argp = clp,
4112 .rpc_cred = cred,
4113 };
4114 unsigned long now = jiffies;
4115 int status;
4116
4117 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4118 if (status < 0)
4119 return status;
4120 do_renew_lease(clp, now);
4121 return 0;
4122}
4123
4124static inline int nfs4_server_supports_acls(struct nfs_server *server)
4125{
4126 return (server->caps & NFS_CAP_ACLS)
4127 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4128 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4129}
4130
4131/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4132 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4133 * the stack.
4134 */
4135#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4136
4137static int buf_to_pages_noslab(const void *buf, size_t buflen,
4138 struct page **pages, unsigned int *pgbase)
4139{
4140 struct page *newpage, **spages;
4141 int rc = 0;
4142 size_t len;
4143 spages = pages;
4144
4145 do {
4146 len = min_t(size_t, PAGE_SIZE, buflen);
4147 newpage = alloc_page(GFP_KERNEL);
4148
4149 if (newpage == NULL)
4150 goto unwind;
4151 memcpy(page_address(newpage), buf, len);
4152 buf += len;
4153 buflen -= len;
4154 *pages++ = newpage;
4155 rc++;
4156 } while (buflen != 0);
4157
4158 return rc;
4159
4160unwind:
4161 for(; rc > 0; rc--)
4162 __free_page(spages[rc-1]);
4163 return -ENOMEM;
4164}
4165
4166struct nfs4_cached_acl {
4167 int cached;
4168 size_t len;
4169 char data[0];
4170};
4171
4172static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4173{
4174 struct nfs_inode *nfsi = NFS_I(inode);
4175
4176 spin_lock(&inode->i_lock);
4177 kfree(nfsi->nfs4_acl);
4178 nfsi->nfs4_acl = acl;
4179 spin_unlock(&inode->i_lock);
4180}
4181
4182static void nfs4_zap_acl_attr(struct inode *inode)
4183{
4184 nfs4_set_cached_acl(inode, NULL);
4185}
4186
4187static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4188{
4189 struct nfs_inode *nfsi = NFS_I(inode);
4190 struct nfs4_cached_acl *acl;
4191 int ret = -ENOENT;
4192
4193 spin_lock(&inode->i_lock);
4194 acl = nfsi->nfs4_acl;
4195 if (acl == NULL)
4196 goto out;
4197 if (buf == NULL) /* user is just asking for length */
4198 goto out_len;
4199 if (acl->cached == 0)
4200 goto out;
4201 ret = -ERANGE; /* see getxattr(2) man page */
4202 if (acl->len > buflen)
4203 goto out;
4204 memcpy(buf, acl->data, acl->len);
4205out_len:
4206 ret = acl->len;
4207out:
4208 spin_unlock(&inode->i_lock);
4209 return ret;
4210}
4211
4212static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4213{
4214 struct nfs4_cached_acl *acl;
4215 size_t buflen = sizeof(*acl) + acl_len;
4216
4217 if (buflen <= PAGE_SIZE) {
4218 acl = kmalloc(buflen, GFP_KERNEL);
4219 if (acl == NULL)
4220 goto out;
4221 acl->cached = 1;
4222 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4223 } else {
4224 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4225 if (acl == NULL)
4226 goto out;
4227 acl->cached = 0;
4228 }
4229 acl->len = acl_len;
4230out:
4231 nfs4_set_cached_acl(inode, acl);
4232}
4233
4234/*
4235 * The getxattr API returns the required buffer length when called with a
4236 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4237 * the required buf. On a NULL buf, we send a page of data to the server
4238 * guessing that the ACL request can be serviced by a page. If so, we cache
4239 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4240 * the cache. If not so, we throw away the page, and cache the required
4241 * length. The next getxattr call will then produce another round trip to
4242 * the server, this time with the input buf of the required size.
4243 */
4244static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4245{
4246 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4247 struct nfs_getaclargs args = {
4248 .fh = NFS_FH(inode),
4249 .acl_pages = pages,
4250 .acl_len = buflen,
4251 };
4252 struct nfs_getaclres res = {
4253 .acl_len = buflen,
4254 };
4255 struct rpc_message msg = {
4256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4257 .rpc_argp = &args,
4258 .rpc_resp = &res,
4259 };
4260 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4261 int ret = -ENOMEM, i;
4262
4263 /* As long as we're doing a round trip to the server anyway,
4264 * let's be prepared for a page of acl data. */
4265 if (npages == 0)
4266 npages = 1;
4267 if (npages > ARRAY_SIZE(pages))
4268 return -ERANGE;
4269
4270 for (i = 0; i < npages; i++) {
4271 pages[i] = alloc_page(GFP_KERNEL);
4272 if (!pages[i])
4273 goto out_free;
4274 }
4275
4276 /* for decoding across pages */
4277 res.acl_scratch = alloc_page(GFP_KERNEL);
4278 if (!res.acl_scratch)
4279 goto out_free;
4280
4281 args.acl_len = npages * PAGE_SIZE;
4282 args.acl_pgbase = 0;
4283
4284 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4285 __func__, buf, buflen, npages, args.acl_len);
4286 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4287 &msg, &args.seq_args, &res.seq_res, 0);
4288 if (ret)
4289 goto out_free;
4290
4291 /* Handle the case where the passed-in buffer is too short */
4292 if (res.acl_flags & NFS4_ACL_TRUNC) {
4293 /* Did the user only issue a request for the acl length? */
4294 if (buf == NULL)
4295 goto out_ok;
4296 ret = -ERANGE;
4297 goto out_free;
4298 }
4299 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4300 if (buf) {
4301 if (res.acl_len > buflen) {
4302 ret = -ERANGE;
4303 goto out_free;
4304 }
4305 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4306 }
4307out_ok:
4308 ret = res.acl_len;
4309out_free:
4310 for (i = 0; i < npages; i++)
4311 if (pages[i])
4312 __free_page(pages[i]);
4313 if (res.acl_scratch)
4314 __free_page(res.acl_scratch);
4315 return ret;
4316}
4317
4318static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4319{
4320 struct nfs4_exception exception = { };
4321 ssize_t ret;
4322 do {
4323 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4324 if (ret >= 0)
4325 break;
4326 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4327 } while (exception.retry);
4328 return ret;
4329}
4330
4331static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4332{
4333 struct nfs_server *server = NFS_SERVER(inode);
4334 int ret;
4335
4336 if (!nfs4_server_supports_acls(server))
4337 return -EOPNOTSUPP;
4338 ret = nfs_revalidate_inode(server, inode);
4339 if (ret < 0)
4340 return ret;
4341 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4342 nfs_zap_acl_cache(inode);
4343 ret = nfs4_read_cached_acl(inode, buf, buflen);
4344 if (ret != -ENOENT)
4345 /* -ENOENT is returned if there is no ACL or if there is an ACL
4346 * but no cached acl data, just the acl length */
4347 return ret;
4348 return nfs4_get_acl_uncached(inode, buf, buflen);
4349}
4350
4351static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4352{
4353 struct nfs_server *server = NFS_SERVER(inode);
4354 struct page *pages[NFS4ACL_MAXPAGES];
4355 struct nfs_setaclargs arg = {
4356 .fh = NFS_FH(inode),
4357 .acl_pages = pages,
4358 .acl_len = buflen,
4359 };
4360 struct nfs_setaclres res;
4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4363 .rpc_argp = &arg,
4364 .rpc_resp = &res,
4365 };
4366 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4367 int ret, i;
4368
4369 if (!nfs4_server_supports_acls(server))
4370 return -EOPNOTSUPP;
4371 if (npages > ARRAY_SIZE(pages))
4372 return -ERANGE;
4373 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4374 if (i < 0)
4375 return i;
4376 nfs4_inode_return_delegation(inode);
4377 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4378
4379 /*
4380 * Free each page after tx, so the only ref left is
4381 * held by the network stack
4382 */
4383 for (; i > 0; i--)
4384 put_page(pages[i-1]);
4385
4386 /*
4387 * Acl update can result in inode attribute update.
4388 * so mark the attribute cache invalid.
4389 */
4390 spin_lock(&inode->i_lock);
4391 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4392 spin_unlock(&inode->i_lock);
4393 nfs_access_zap_cache(inode);
4394 nfs_zap_acl_cache(inode);
4395 return ret;
4396}
4397
4398static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4399{
4400 struct nfs4_exception exception = { };
4401 int err;
4402 do {
4403 err = nfs4_handle_exception(NFS_SERVER(inode),
4404 __nfs4_proc_set_acl(inode, buf, buflen),
4405 &exception);
4406 } while (exception.retry);
4407 return err;
4408}
4409
4410#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4411static int _nfs4_get_security_label(struct inode *inode, void *buf,
4412 size_t buflen)
4413{
4414 struct nfs_server *server = NFS_SERVER(inode);
4415 struct nfs_fattr fattr;
4416 struct nfs4_label label = {0, 0, buflen, buf};
4417
4418 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4419 struct nfs4_getattr_arg args = {
4420 .fh = NFS_FH(inode),
4421 .bitmask = bitmask,
4422 };
4423 struct nfs4_getattr_res res = {
4424 .fattr = &fattr,
4425 .label = &label,
4426 .server = server,
4427 };
4428 struct rpc_message msg = {
4429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4430 .rpc_argp = &args,
4431 .rpc_resp = &res,
4432 };
4433 int ret;
4434
4435 nfs_fattr_init(&fattr);
4436
4437 ret = rpc_call_sync(server->client, &msg, 0);
4438 if (ret)
4439 return ret;
4440 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4441 return -ENOENT;
4442 if (buflen < label.len)
4443 return -ERANGE;
4444 return 0;
4445}
4446
4447static int nfs4_get_security_label(struct inode *inode, void *buf,
4448 size_t buflen)
4449{
4450 struct nfs4_exception exception = { };
4451 int err;
4452
4453 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4454 return -EOPNOTSUPP;
4455
4456 do {
4457 err = nfs4_handle_exception(NFS_SERVER(inode),
4458 _nfs4_get_security_label(inode, buf, buflen),
4459 &exception);
4460 } while (exception.retry);
4461 return err;
4462}
4463
4464static int _nfs4_do_set_security_label(struct inode *inode,
4465 struct nfs4_label *ilabel,
4466 struct nfs_fattr *fattr,
4467 struct nfs4_label *olabel)
4468{
4469
4470 struct iattr sattr = {0};
4471 struct nfs_server *server = NFS_SERVER(inode);
4472 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4473 struct nfs_setattrargs args = {
4474 .fh = NFS_FH(inode),
4475 .iap = &sattr,
4476 .server = server,
4477 .bitmask = bitmask,
4478 .label = ilabel,
4479 };
4480 struct nfs_setattrres res = {
4481 .fattr = fattr,
4482 .label = olabel,
4483 .server = server,
4484 };
4485 struct rpc_message msg = {
4486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4487 .rpc_argp = &args,
4488 .rpc_resp = &res,
4489 };
4490 int status;
4491
4492 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4493
4494 status = rpc_call_sync(server->client, &msg, 0);
4495 if (status)
4496 dprintk("%s failed: %d\n", __func__, status);
4497
4498 return status;
4499}
4500
4501static int nfs4_do_set_security_label(struct inode *inode,
4502 struct nfs4_label *ilabel,
4503 struct nfs_fattr *fattr,
4504 struct nfs4_label *olabel)
4505{
4506 struct nfs4_exception exception = { };
4507 int err;
4508
4509 do {
4510 err = nfs4_handle_exception(NFS_SERVER(inode),
4511 _nfs4_do_set_security_label(inode, ilabel,
4512 fattr, olabel),
4513 &exception);
4514 } while (exception.retry);
4515 return err;
4516}
4517
4518static int
4519nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4520{
4521 struct nfs4_label ilabel, *olabel = NULL;
4522 struct nfs_fattr fattr;
4523 struct rpc_cred *cred;
4524 struct inode *inode = dentry->d_inode;
4525 int status;
4526
4527 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4528 return -EOPNOTSUPP;
4529
4530 nfs_fattr_init(&fattr);
4531
4532 ilabel.pi = 0;
4533 ilabel.lfs = 0;
4534 ilabel.label = (char *)buf;
4535 ilabel.len = buflen;
4536
4537 cred = rpc_lookup_cred();
4538 if (IS_ERR(cred))
4539 return PTR_ERR(cred);
4540
4541 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4542 if (IS_ERR(olabel)) {
4543 status = -PTR_ERR(olabel);
4544 goto out;
4545 }
4546
4547 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4548 if (status == 0)
4549 nfs_setsecurity(inode, &fattr, olabel);
4550
4551 nfs4_label_free(olabel);
4552out:
4553 put_rpccred(cred);
4554 return status;
4555}
4556#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4557
4558
4559static int
4560nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4561{
4562 struct nfs_client *clp = server->nfs_client;
4563
4564 if (task->tk_status >= 0)
4565 return 0;
4566 switch(task->tk_status) {
4567 case -NFS4ERR_DELEG_REVOKED:
4568 case -NFS4ERR_ADMIN_REVOKED:
4569 case -NFS4ERR_BAD_STATEID:
4570 if (state == NULL)
4571 break;
4572 nfs_remove_bad_delegation(state->inode);
4573 case -NFS4ERR_OPENMODE:
4574 if (state == NULL)
4575 break;
4576 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4577 goto stateid_invalid;
4578 goto wait_on_recovery;
4579 case -NFS4ERR_EXPIRED:
4580 if (state != NULL) {
4581 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4582 goto stateid_invalid;
4583 }
4584 case -NFS4ERR_STALE_STATEID:
4585 case -NFS4ERR_STALE_CLIENTID:
4586 nfs4_schedule_lease_recovery(clp);
4587 goto wait_on_recovery;
4588#if defined(CONFIG_NFS_V4_1)
4589 case -NFS4ERR_BADSESSION:
4590 case -NFS4ERR_BADSLOT:
4591 case -NFS4ERR_BAD_HIGH_SLOT:
4592 case -NFS4ERR_DEADSESSION:
4593 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4594 case -NFS4ERR_SEQ_FALSE_RETRY:
4595 case -NFS4ERR_SEQ_MISORDERED:
4596 dprintk("%s ERROR %d, Reset session\n", __func__,
4597 task->tk_status);
4598 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4599 task->tk_status = 0;
4600 return -EAGAIN;
4601#endif /* CONFIG_NFS_V4_1 */
4602 case -NFS4ERR_DELAY:
4603 nfs_inc_server_stats(server, NFSIOS_DELAY);
4604 case -NFS4ERR_GRACE:
4605 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4606 task->tk_status = 0;
4607 return -EAGAIN;
4608 case -NFS4ERR_RETRY_UNCACHED_REP:
4609 case -NFS4ERR_OLD_STATEID:
4610 task->tk_status = 0;
4611 return -EAGAIN;
4612 }
4613 task->tk_status = nfs4_map_errors(task->tk_status);
4614 return 0;
4615stateid_invalid:
4616 task->tk_status = -EIO;
4617 return 0;
4618wait_on_recovery:
4619 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4620 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4621 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4622 task->tk_status = 0;
4623 return -EAGAIN;
4624}
4625
4626static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4627 nfs4_verifier *bootverf)
4628{
4629 __be32 verf[2];
4630
4631 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4632 /* An impossible timestamp guarantees this value
4633 * will never match a generated boot time. */
4634 verf[0] = 0;
4635 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4636 } else {
4637 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4638 verf[0] = (__be32)nn->boot_time.tv_sec;
4639 verf[1] = (__be32)nn->boot_time.tv_nsec;
4640 }
4641 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4642}
4643
4644static unsigned int
4645nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4646 char *buf, size_t len)
4647{
4648 unsigned int result;
4649
4650 rcu_read_lock();
4651 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4652 clp->cl_ipaddr,
4653 rpc_peeraddr2str(clp->cl_rpcclient,
4654 RPC_DISPLAY_ADDR),
4655 rpc_peeraddr2str(clp->cl_rpcclient,
4656 RPC_DISPLAY_PROTO));
4657 rcu_read_unlock();
4658 return result;
4659}
4660
4661static unsigned int
4662nfs4_init_uniform_client_string(const struct nfs_client *clp,
4663 char *buf, size_t len)
4664{
4665 const char *nodename = clp->cl_rpcclient->cl_nodename;
4666
4667 if (nfs4_client_id_uniquifier[0] != '\0')
4668 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4669 clp->rpc_ops->version,
4670 clp->cl_minorversion,
4671 nfs4_client_id_uniquifier,
4672 nodename);
4673 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4674 clp->rpc_ops->version, clp->cl_minorversion,
4675 nodename);
4676}
4677
4678/**
4679 * nfs4_proc_setclientid - Negotiate client ID
4680 * @clp: state data structure
4681 * @program: RPC program for NFSv4 callback service
4682 * @port: IP port number for NFS4 callback service
4683 * @cred: RPC credential to use for this call
4684 * @res: where to place the result
4685 *
4686 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4687 */
4688int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4689 unsigned short port, struct rpc_cred *cred,
4690 struct nfs4_setclientid_res *res)
4691{
4692 nfs4_verifier sc_verifier;
4693 struct nfs4_setclientid setclientid = {
4694 .sc_verifier = &sc_verifier,
4695 .sc_prog = program,
4696 .sc_cb_ident = clp->cl_cb_ident,
4697 };
4698 struct rpc_message msg = {
4699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4700 .rpc_argp = &setclientid,
4701 .rpc_resp = res,
4702 .rpc_cred = cred,
4703 };
4704 int status;
4705
4706 /* nfs_client_id4 */
4707 nfs4_init_boot_verifier(clp, &sc_verifier);
4708 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4709 setclientid.sc_name_len =
4710 nfs4_init_uniform_client_string(clp,
4711 setclientid.sc_name,
4712 sizeof(setclientid.sc_name));
4713 else
4714 setclientid.sc_name_len =
4715 nfs4_init_nonuniform_client_string(clp,
4716 setclientid.sc_name,
4717 sizeof(setclientid.sc_name));
4718 /* cb_client4 */
4719 rcu_read_lock();
4720 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4721 sizeof(setclientid.sc_netid), "%s",
4722 rpc_peeraddr2str(clp->cl_rpcclient,
4723 RPC_DISPLAY_NETID));
4724 rcu_read_unlock();
4725 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4726 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4727 clp->cl_ipaddr, port >> 8, port & 255);
4728
4729 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4730 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4731 setclientid.sc_name_len, setclientid.sc_name);
4732 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4733 dprintk("NFS reply setclientid: %d\n", status);
4734 return status;
4735}
4736
4737/**
4738 * nfs4_proc_setclientid_confirm - Confirm client ID
4739 * @clp: state data structure
4740 * @res: result of a previous SETCLIENTID
4741 * @cred: RPC credential to use for this call
4742 *
4743 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4744 */
4745int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4746 struct nfs4_setclientid_res *arg,
4747 struct rpc_cred *cred)
4748{
4749 struct rpc_message msg = {
4750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4751 .rpc_argp = arg,
4752 .rpc_cred = cred,
4753 };
4754 int status;
4755
4756 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4757 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4758 clp->cl_clientid);
4759 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4760 dprintk("NFS reply setclientid_confirm: %d\n", status);
4761 return status;
4762}
4763
4764struct nfs4_delegreturndata {
4765 struct nfs4_delegreturnargs args;
4766 struct nfs4_delegreturnres res;
4767 struct nfs_fh fh;
4768 nfs4_stateid stateid;
4769 unsigned long timestamp;
4770 struct nfs_fattr fattr;
4771 int rpc_status;
4772};
4773
4774static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4775{
4776 struct nfs4_delegreturndata *data = calldata;
4777
4778 if (!nfs4_sequence_done(task, &data->res.seq_res))
4779 return;
4780
4781 switch (task->tk_status) {
4782 case -NFS4ERR_STALE_STATEID:
4783 case -NFS4ERR_EXPIRED:
4784 case 0:
4785 renew_lease(data->res.server, data->timestamp);
4786 break;
4787 default:
4788 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4789 -EAGAIN) {
4790 rpc_restart_call_prepare(task);
4791 return;
4792 }
4793 }
4794 data->rpc_status = task->tk_status;
4795}
4796
4797static void nfs4_delegreturn_release(void *calldata)
4798{
4799 kfree(calldata);
4800}
4801
4802#if defined(CONFIG_NFS_V4_1)
4803static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4804{
4805 struct nfs4_delegreturndata *d_data;
4806
4807 d_data = (struct nfs4_delegreturndata *)data;
4808
4809 nfs4_setup_sequence(d_data->res.server,
4810 &d_data->args.seq_args,
4811 &d_data->res.seq_res,
4812 task);
4813}
4814#endif /* CONFIG_NFS_V4_1 */
4815
4816static const struct rpc_call_ops nfs4_delegreturn_ops = {
4817#if defined(CONFIG_NFS_V4_1)
4818 .rpc_call_prepare = nfs4_delegreturn_prepare,
4819#endif /* CONFIG_NFS_V4_1 */
4820 .rpc_call_done = nfs4_delegreturn_done,
4821 .rpc_release = nfs4_delegreturn_release,
4822};
4823
4824static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4825{
4826 struct nfs4_delegreturndata *data;
4827 struct nfs_server *server = NFS_SERVER(inode);
4828 struct rpc_task *task;
4829 struct rpc_message msg = {
4830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4831 .rpc_cred = cred,
4832 };
4833 struct rpc_task_setup task_setup_data = {
4834 .rpc_client = server->client,
4835 .rpc_message = &msg,
4836 .callback_ops = &nfs4_delegreturn_ops,
4837 .flags = RPC_TASK_ASYNC,
4838 };
4839 int status = 0;
4840
4841 data = kzalloc(sizeof(*data), GFP_NOFS);
4842 if (data == NULL)
4843 return -ENOMEM;
4844 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4845 data->args.fhandle = &data->fh;
4846 data->args.stateid = &data->stateid;
4847 data->args.bitmask = server->cache_consistency_bitmask;
4848 nfs_copy_fh(&data->fh, NFS_FH(inode));
4849 nfs4_stateid_copy(&data->stateid, stateid);
4850 data->res.fattr = &data->fattr;
4851 data->res.server = server;
4852 nfs_fattr_init(data->res.fattr);
4853 data->timestamp = jiffies;
4854 data->rpc_status = 0;
4855
4856 task_setup_data.callback_data = data;
4857 msg.rpc_argp = &data->args;
4858 msg.rpc_resp = &data->res;
4859 task = rpc_run_task(&task_setup_data);
4860 if (IS_ERR(task))
4861 return PTR_ERR(task);
4862 if (!issync)
4863 goto out;
4864 status = nfs4_wait_for_completion_rpc_task(task);
4865 if (status != 0)
4866 goto out;
4867 status = data->rpc_status;
4868 if (status == 0)
4869 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4870 else
4871 nfs_refresh_inode(inode, &data->fattr);
4872out:
4873 rpc_put_task(task);
4874 return status;
4875}
4876
4877int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4878{
4879 struct nfs_server *server = NFS_SERVER(inode);
4880 struct nfs4_exception exception = { };
4881 int err;
4882 do {
4883 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4884 switch (err) {
4885 case -NFS4ERR_STALE_STATEID:
4886 case -NFS4ERR_EXPIRED:
4887 case 0:
4888 return 0;
4889 }
4890 err = nfs4_handle_exception(server, err, &exception);
4891 } while (exception.retry);
4892 return err;
4893}
4894
4895#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4896#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4897
4898/*
4899 * sleep, with exponential backoff, and retry the LOCK operation.
4900 */
4901static unsigned long
4902nfs4_set_lock_task_retry(unsigned long timeout)
4903{
4904 freezable_schedule_timeout_killable_unsafe(timeout);
4905 timeout <<= 1;
4906 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4907 return NFS4_LOCK_MAXTIMEOUT;
4908 return timeout;
4909}
4910
4911static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4912{
4913 struct inode *inode = state->inode;
4914 struct nfs_server *server = NFS_SERVER(inode);
4915 struct nfs_client *clp = server->nfs_client;
4916 struct nfs_lockt_args arg = {
4917 .fh = NFS_FH(inode),
4918 .fl = request,
4919 };
4920 struct nfs_lockt_res res = {
4921 .denied = request,
4922 };
4923 struct rpc_message msg = {
4924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4925 .rpc_argp = &arg,
4926 .rpc_resp = &res,
4927 .rpc_cred = state->owner->so_cred,
4928 };
4929 struct nfs4_lock_state *lsp;
4930 int status;
4931
4932 arg.lock_owner.clientid = clp->cl_clientid;
4933 status = nfs4_set_lock_state(state, request);
4934 if (status != 0)
4935 goto out;
4936 lsp = request->fl_u.nfs4_fl.owner;
4937 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4938 arg.lock_owner.s_dev = server->s_dev;
4939 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4940 switch (status) {
4941 case 0:
4942 request->fl_type = F_UNLCK;
4943 break;
4944 case -NFS4ERR_DENIED:
4945 status = 0;
4946 }
4947 request->fl_ops->fl_release_private(request);
4948out:
4949 return status;
4950}
4951
4952static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4953{
4954 struct nfs4_exception exception = { };
4955 int err;
4956
4957 do {
4958 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4959 _nfs4_proc_getlk(state, cmd, request),
4960 &exception);
4961 } while (exception.retry);
4962 return err;
4963}
4964
4965static int do_vfs_lock(struct file *file, struct file_lock *fl)
4966{
4967 int res = 0;
4968 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4969 case FL_POSIX:
4970 res = posix_lock_file_wait(file, fl);
4971 break;
4972 case FL_FLOCK:
4973 res = flock_lock_file_wait(file, fl);
4974 break;
4975 default:
4976 BUG();
4977 }
4978 return res;
4979}
4980
4981struct nfs4_unlockdata {
4982 struct nfs_locku_args arg;
4983 struct nfs_locku_res res;
4984 struct nfs4_lock_state *lsp;
4985 struct nfs_open_context *ctx;
4986 struct file_lock fl;
4987 const struct nfs_server *server;
4988 unsigned long timestamp;
4989};
4990
4991static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4992 struct nfs_open_context *ctx,
4993 struct nfs4_lock_state *lsp,
4994 struct nfs_seqid *seqid)
4995{
4996 struct nfs4_unlockdata *p;
4997 struct inode *inode = lsp->ls_state->inode;
4998
4999 p = kzalloc(sizeof(*p), GFP_NOFS);
5000 if (p == NULL)
5001 return NULL;
5002 p->arg.fh = NFS_FH(inode);
5003 p->arg.fl = &p->fl;
5004 p->arg.seqid = seqid;
5005 p->res.seqid = seqid;
5006 p->arg.stateid = &lsp->ls_stateid;
5007 p->lsp = lsp;
5008 atomic_inc(&lsp->ls_count);
5009 /* Ensure we don't close file until we're done freeing locks! */
5010 p->ctx = get_nfs_open_context(ctx);
5011 memcpy(&p->fl, fl, sizeof(p->fl));
5012 p->server = NFS_SERVER(inode);
5013 return p;
5014}
5015
5016static void nfs4_locku_release_calldata(void *data)
5017{
5018 struct nfs4_unlockdata *calldata = data;
5019 nfs_free_seqid(calldata->arg.seqid);
5020 nfs4_put_lock_state(calldata->lsp);
5021 put_nfs_open_context(calldata->ctx);
5022 kfree(calldata);
5023}
5024
5025static void nfs4_locku_done(struct rpc_task *task, void *data)
5026{
5027 struct nfs4_unlockdata *calldata = data;
5028
5029 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5030 return;
5031 switch (task->tk_status) {
5032 case 0:
5033 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5034 &calldata->res.stateid);
5035 renew_lease(calldata->server, calldata->timestamp);
5036 break;
5037 case -NFS4ERR_BAD_STATEID:
5038 case -NFS4ERR_OLD_STATEID:
5039 case -NFS4ERR_STALE_STATEID:
5040 case -NFS4ERR_EXPIRED:
5041 break;
5042 default:
5043 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5044 rpc_restart_call_prepare(task);
5045 }
5046 nfs_release_seqid(calldata->arg.seqid);
5047}
5048
5049static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5050{
5051 struct nfs4_unlockdata *calldata = data;
5052
5053 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5054 goto out_wait;
5055 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5056 /* Note: exit _without_ running nfs4_locku_done */
5057 goto out_no_action;
5058 }
5059 calldata->timestamp = jiffies;
5060 if (nfs4_setup_sequence(calldata->server,
5061 &calldata->arg.seq_args,
5062 &calldata->res.seq_res,
5063 task) != 0)
5064 nfs_release_seqid(calldata->arg.seqid);
5065 return;
5066out_no_action:
5067 task->tk_action = NULL;
5068out_wait:
5069 nfs4_sequence_done(task, &calldata->res.seq_res);
5070}
5071
5072static const struct rpc_call_ops nfs4_locku_ops = {
5073 .rpc_call_prepare = nfs4_locku_prepare,
5074 .rpc_call_done = nfs4_locku_done,
5075 .rpc_release = nfs4_locku_release_calldata,
5076};
5077
5078static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5079 struct nfs_open_context *ctx,
5080 struct nfs4_lock_state *lsp,
5081 struct nfs_seqid *seqid)
5082{
5083 struct nfs4_unlockdata *data;
5084 struct rpc_message msg = {
5085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5086 .rpc_cred = ctx->cred,
5087 };
5088 struct rpc_task_setup task_setup_data = {
5089 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5090 .rpc_message = &msg,
5091 .callback_ops = &nfs4_locku_ops,
5092 .workqueue = nfsiod_workqueue,
5093 .flags = RPC_TASK_ASYNC,
5094 };
5095
5096 /* Ensure this is an unlock - when canceling a lock, the
5097 * canceled lock is passed in, and it won't be an unlock.
5098 */
5099 fl->fl_type = F_UNLCK;
5100
5101 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5102 if (data == NULL) {
5103 nfs_free_seqid(seqid);
5104 return ERR_PTR(-ENOMEM);
5105 }
5106
5107 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5108 msg.rpc_argp = &data->arg;
5109 msg.rpc_resp = &data->res;
5110 task_setup_data.callback_data = data;
5111 return rpc_run_task(&task_setup_data);
5112}
5113
5114static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5115{
5116 struct inode *inode = state->inode;
5117 struct nfs4_state_owner *sp = state->owner;
5118 struct nfs_inode *nfsi = NFS_I(inode);
5119 struct nfs_seqid *seqid;
5120 struct nfs4_lock_state *lsp;
5121 struct rpc_task *task;
5122 int status = 0;
5123 unsigned char fl_flags = request->fl_flags;
5124
5125 status = nfs4_set_lock_state(state, request);
5126 /* Unlock _before_ we do the RPC call */
5127 request->fl_flags |= FL_EXISTS;
5128 /* Exclude nfs_delegation_claim_locks() */
5129 mutex_lock(&sp->so_delegreturn_mutex);
5130 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5131 down_read(&nfsi->rwsem);
5132 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5133 up_read(&nfsi->rwsem);
5134 mutex_unlock(&sp->so_delegreturn_mutex);
5135 goto out;
5136 }
5137 up_read(&nfsi->rwsem);
5138 mutex_unlock(&sp->so_delegreturn_mutex);
5139 if (status != 0)
5140 goto out;
5141 /* Is this a delegated lock? */
5142 lsp = request->fl_u.nfs4_fl.owner;
5143 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5144 goto out;
5145 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5146 status = -ENOMEM;
5147 if (seqid == NULL)
5148 goto out;
5149 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5150 status = PTR_ERR(task);
5151 if (IS_ERR(task))
5152 goto out;
5153 status = nfs4_wait_for_completion_rpc_task(task);
5154 rpc_put_task(task);
5155out:
5156 request->fl_flags = fl_flags;
5157 return status;
5158}
5159
5160struct nfs4_lockdata {
5161 struct nfs_lock_args arg;
5162 struct nfs_lock_res res;
5163 struct nfs4_lock_state *lsp;
5164 struct nfs_open_context *ctx;
5165 struct file_lock fl;
5166 unsigned long timestamp;
5167 int rpc_status;
5168 int cancelled;
5169 struct nfs_server *server;
5170};
5171
5172static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5173 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5174 gfp_t gfp_mask)
5175{
5176 struct nfs4_lockdata *p;
5177 struct inode *inode = lsp->ls_state->inode;
5178 struct nfs_server *server = NFS_SERVER(inode);
5179
5180 p = kzalloc(sizeof(*p), gfp_mask);
5181 if (p == NULL)
5182 return NULL;
5183
5184 p->arg.fh = NFS_FH(inode);
5185 p->arg.fl = &p->fl;
5186 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5187 if (p->arg.open_seqid == NULL)
5188 goto out_free;
5189 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5190 if (p->arg.lock_seqid == NULL)
5191 goto out_free_seqid;
5192 p->arg.lock_stateid = &lsp->ls_stateid;
5193 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5194 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5195 p->arg.lock_owner.s_dev = server->s_dev;
5196 p->res.lock_seqid = p->arg.lock_seqid;
5197 p->lsp = lsp;
5198 p->server = server;
5199 atomic_inc(&lsp->ls_count);
5200 p->ctx = get_nfs_open_context(ctx);
5201 memcpy(&p->fl, fl, sizeof(p->fl));
5202 return p;
5203out_free_seqid:
5204 nfs_free_seqid(p->arg.open_seqid);
5205out_free:
5206 kfree(p);
5207 return NULL;
5208}
5209
5210static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5211{
5212 struct nfs4_lockdata *data = calldata;
5213 struct nfs4_state *state = data->lsp->ls_state;
5214
5215 dprintk("%s: begin!\n", __func__);
5216 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5217 goto out_wait;
5218 /* Do we need to do an open_to_lock_owner? */
5219 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5220 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5221 goto out_release_lock_seqid;
5222 }
5223 data->arg.open_stateid = &state->open_stateid;
5224 data->arg.new_lock_owner = 1;
5225 data->res.open_seqid = data->arg.open_seqid;
5226 } else
5227 data->arg.new_lock_owner = 0;
5228 if (!nfs4_valid_open_stateid(state)) {
5229 data->rpc_status = -EBADF;
5230 task->tk_action = NULL;
5231 goto out_release_open_seqid;
5232 }
5233 data->timestamp = jiffies;
5234 if (nfs4_setup_sequence(data->server,
5235 &data->arg.seq_args,
5236 &data->res.seq_res,
5237 task) == 0)
5238 return;
5239out_release_open_seqid:
5240 nfs_release_seqid(data->arg.open_seqid);
5241out_release_lock_seqid:
5242 nfs_release_seqid(data->arg.lock_seqid);
5243out_wait:
5244 nfs4_sequence_done(task, &data->res.seq_res);
5245 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5246}
5247
5248static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5249{
5250 struct nfs4_lockdata *data = calldata;
5251
5252 dprintk("%s: begin!\n", __func__);
5253
5254 if (!nfs4_sequence_done(task, &data->res.seq_res))
5255 return;
5256
5257 data->rpc_status = task->tk_status;
5258 if (data->arg.new_lock_owner != 0) {
5259 if (data->rpc_status == 0)
5260 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5261 else
5262 goto out;
5263 }
5264 if (data->rpc_status == 0) {
5265 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5266 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5267 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5268 }
5269out:
5270 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5271}
5272
5273static void nfs4_lock_release(void *calldata)
5274{
5275 struct nfs4_lockdata *data = calldata;
5276
5277 dprintk("%s: begin!\n", __func__);
5278 nfs_free_seqid(data->arg.open_seqid);
5279 if (data->cancelled != 0) {
5280 struct rpc_task *task;
5281 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5282 data->arg.lock_seqid);
5283 if (!IS_ERR(task))
5284 rpc_put_task_async(task);
5285 dprintk("%s: cancelling lock!\n", __func__);
5286 } else
5287 nfs_free_seqid(data->arg.lock_seqid);
5288 nfs4_put_lock_state(data->lsp);
5289 put_nfs_open_context(data->ctx);
5290 kfree(data);
5291 dprintk("%s: done!\n", __func__);
5292}
5293
5294static const struct rpc_call_ops nfs4_lock_ops = {
5295 .rpc_call_prepare = nfs4_lock_prepare,
5296 .rpc_call_done = nfs4_lock_done,
5297 .rpc_release = nfs4_lock_release,
5298};
5299
5300static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5301{
5302 switch (error) {
5303 case -NFS4ERR_ADMIN_REVOKED:
5304 case -NFS4ERR_BAD_STATEID:
5305 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5306 if (new_lock_owner != 0 ||
5307 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5308 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5309 break;
5310 case -NFS4ERR_STALE_STATEID:
5311 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5312 case -NFS4ERR_EXPIRED:
5313 nfs4_schedule_lease_recovery(server->nfs_client);
5314 };
5315}
5316
5317static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5318{
5319 struct nfs4_lockdata *data;
5320 struct rpc_task *task;
5321 struct rpc_message msg = {
5322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5323 .rpc_cred = state->owner->so_cred,
5324 };
5325 struct rpc_task_setup task_setup_data = {
5326 .rpc_client = NFS_CLIENT(state->inode),
5327 .rpc_message = &msg,
5328 .callback_ops = &nfs4_lock_ops,
5329 .workqueue = nfsiod_workqueue,
5330 .flags = RPC_TASK_ASYNC,
5331 };
5332 int ret;
5333
5334 dprintk("%s: begin!\n", __func__);
5335 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5336 fl->fl_u.nfs4_fl.owner,
5337 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5338 if (data == NULL)
5339 return -ENOMEM;
5340 if (IS_SETLKW(cmd))
5341 data->arg.block = 1;
5342 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5343 msg.rpc_argp = &data->arg;
5344 msg.rpc_resp = &data->res;
5345 task_setup_data.callback_data = data;
5346 if (recovery_type > NFS_LOCK_NEW) {
5347 if (recovery_type == NFS_LOCK_RECLAIM)
5348 data->arg.reclaim = NFS_LOCK_RECLAIM;
5349 nfs4_set_sequence_privileged(&data->arg.seq_args);
5350 }
5351 task = rpc_run_task(&task_setup_data);
5352 if (IS_ERR(task))
5353 return PTR_ERR(task);
5354 ret = nfs4_wait_for_completion_rpc_task(task);
5355 if (ret == 0) {
5356 ret = data->rpc_status;
5357 if (ret)
5358 nfs4_handle_setlk_error(data->server, data->lsp,
5359 data->arg.new_lock_owner, ret);
5360 } else
5361 data->cancelled = 1;
5362 rpc_put_task(task);
5363 dprintk("%s: done, ret = %d!\n", __func__, ret);
5364 return ret;
5365}
5366
5367static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5368{
5369 struct nfs_server *server = NFS_SERVER(state->inode);
5370 struct nfs4_exception exception = {
5371 .inode = state->inode,
5372 };
5373 int err;
5374
5375 do {
5376 /* Cache the lock if possible... */
5377 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5378 return 0;
5379 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5380 if (err != -NFS4ERR_DELAY)
5381 break;
5382 nfs4_handle_exception(server, err, &exception);
5383 } while (exception.retry);
5384 return err;
5385}
5386
5387static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5388{
5389 struct nfs_server *server = NFS_SERVER(state->inode);
5390 struct nfs4_exception exception = {
5391 .inode = state->inode,
5392 };
5393 int err;
5394
5395 err = nfs4_set_lock_state(state, request);
5396 if (err != 0)
5397 return err;
5398 do {
5399 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5400 return 0;
5401 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5402 switch (err) {
5403 default:
5404 goto out;
5405 case -NFS4ERR_GRACE:
5406 case -NFS4ERR_DELAY:
5407 nfs4_handle_exception(server, err, &exception);
5408 err = 0;
5409 }
5410 } while (exception.retry);
5411out:
5412 return err;
5413}
5414
5415#if defined(CONFIG_NFS_V4_1)
5416/**
5417 * nfs41_check_expired_locks - possibly free a lock stateid
5418 *
5419 * @state: NFSv4 state for an inode
5420 *
5421 * Returns NFS_OK if recovery for this stateid is now finished.
5422 * Otherwise a negative NFS4ERR value is returned.
5423 */
5424static int nfs41_check_expired_locks(struct nfs4_state *state)
5425{
5426 int status, ret = -NFS4ERR_BAD_STATEID;
5427 struct nfs4_lock_state *lsp;
5428 struct nfs_server *server = NFS_SERVER(state->inode);
5429
5430 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5431 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5432 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5433
5434 status = nfs41_test_stateid(server,
5435 &lsp->ls_stateid,
5436 cred);
5437 if (status != NFS_OK) {
5438 /* Free the stateid unless the server
5439 * informs us the stateid is unrecognized. */
5440 if (status != -NFS4ERR_BAD_STATEID)
5441 nfs41_free_stateid(server,
5442 &lsp->ls_stateid,
5443 cred);
5444 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5445 ret = status;
5446 }
5447 }
5448 };
5449
5450 return ret;
5451}
5452
5453static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5454{
5455 int status = NFS_OK;
5456
5457 if (test_bit(LK_STATE_IN_USE, &state->flags))
5458 status = nfs41_check_expired_locks(state);
5459 if (status != NFS_OK)
5460 status = nfs4_lock_expired(state, request);
5461 return status;
5462}
5463#endif
5464
5465static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5466{
5467 struct nfs4_state_owner *sp = state->owner;
5468 struct nfs_inode *nfsi = NFS_I(state->inode);
5469 unsigned char fl_flags = request->fl_flags;
5470 unsigned int seq;
5471 int status = -ENOLCK;
5472
5473 if ((fl_flags & FL_POSIX) &&
5474 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5475 goto out;
5476 /* Is this a delegated open? */
5477 status = nfs4_set_lock_state(state, request);
5478 if (status != 0)
5479 goto out;
5480 request->fl_flags |= FL_ACCESS;
5481 status = do_vfs_lock(request->fl_file, request);
5482 if (status < 0)
5483 goto out;
5484 down_read(&nfsi->rwsem);
5485 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5486 /* Yes: cache locks! */
5487 /* ...but avoid races with delegation recall... */
5488 request->fl_flags = fl_flags & ~FL_SLEEP;
5489 status = do_vfs_lock(request->fl_file, request);
5490 goto out_unlock;
5491 }
5492 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5493 up_read(&nfsi->rwsem);
5494 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5495 if (status != 0)
5496 goto out;
5497 down_read(&nfsi->rwsem);
5498 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5499 status = -NFS4ERR_DELAY;
5500 goto out_unlock;
5501 }
5502 /* Note: we always want to sleep here! */
5503 request->fl_flags = fl_flags | FL_SLEEP;
5504 if (do_vfs_lock(request->fl_file, request) < 0)
5505 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5506 "manager!\n", __func__);
5507out_unlock:
5508 up_read(&nfsi->rwsem);
5509out:
5510 request->fl_flags = fl_flags;
5511 return status;
5512}
5513
5514static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5515{
5516 struct nfs4_exception exception = {
5517 .state = state,
5518 .inode = state->inode,
5519 };
5520 int err;
5521
5522 do {
5523 err = _nfs4_proc_setlk(state, cmd, request);
5524 if (err == -NFS4ERR_DENIED)
5525 err = -EAGAIN;
5526 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5527 err, &exception);
5528 } while (exception.retry);
5529 return err;
5530}
5531
5532static int
5533nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5534{
5535 struct nfs_open_context *ctx;
5536 struct nfs4_state *state;
5537 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5538 int status;
5539
5540 /* verify open state */
5541 ctx = nfs_file_open_context(filp);
5542 state = ctx->state;
5543
5544 if (request->fl_start < 0 || request->fl_end < 0)
5545 return -EINVAL;
5546
5547 if (IS_GETLK(cmd)) {
5548 if (state != NULL)
5549 return nfs4_proc_getlk(state, F_GETLK, request);
5550 return 0;
5551 }
5552
5553 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5554 return -EINVAL;
5555
5556 if (request->fl_type == F_UNLCK) {
5557 if (state != NULL)
5558 return nfs4_proc_unlck(state, cmd, request);
5559 return 0;
5560 }
5561
5562 if (state == NULL)
5563 return -ENOLCK;
5564 /*
5565 * Don't rely on the VFS having checked the file open mode,
5566 * since it won't do this for flock() locks.
5567 */
5568 switch (request->fl_type) {
5569 case F_RDLCK:
5570 if (!(filp->f_mode & FMODE_READ))
5571 return -EBADF;
5572 break;
5573 case F_WRLCK:
5574 if (!(filp->f_mode & FMODE_WRITE))
5575 return -EBADF;
5576 }
5577
5578 do {
5579 status = nfs4_proc_setlk(state, cmd, request);
5580 if ((status != -EAGAIN) || IS_SETLK(cmd))
5581 break;
5582 timeout = nfs4_set_lock_task_retry(timeout);
5583 status = -ERESTARTSYS;
5584 if (signalled())
5585 break;
5586 } while(status < 0);
5587 return status;
5588}
5589
5590int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5591{
5592 struct nfs_server *server = NFS_SERVER(state->inode);
5593 int err;
5594
5595 err = nfs4_set_lock_state(state, fl);
5596 if (err != 0)
5597 return err;
5598 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5599 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5600}
5601
5602struct nfs_release_lockowner_data {
5603 struct nfs4_lock_state *lsp;
5604 struct nfs_server *server;
5605 struct nfs_release_lockowner_args args;
5606};
5607
5608static void nfs4_release_lockowner_release(void *calldata)
5609{
5610 struct nfs_release_lockowner_data *data = calldata;
5611 nfs4_free_lock_state(data->server, data->lsp);
5612 kfree(calldata);
5613}
5614
5615static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5616 .rpc_release = nfs4_release_lockowner_release,
5617};
5618
5619static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5620{
5621 struct nfs_release_lockowner_data *data;
5622 struct rpc_message msg = {
5623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5624 };
5625
5626 if (server->nfs_client->cl_mvops->minor_version != 0)
5627 return -EINVAL;
5628 data = kmalloc(sizeof(*data), GFP_NOFS);
5629 if (!data)
5630 return -ENOMEM;
5631 data->lsp = lsp;
5632 data->server = server;
5633 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5634 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5635 data->args.lock_owner.s_dev = server->s_dev;
5636 msg.rpc_argp = &data->args;
5637 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5638 return 0;
5639}
5640
5641#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5642
5643static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5644 const void *buf, size_t buflen,
5645 int flags, int type)
5646{
5647 if (strcmp(key, "") != 0)
5648 return -EINVAL;
5649
5650 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5651}
5652
5653static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5654 void *buf, size_t buflen, int type)
5655{
5656 if (strcmp(key, "") != 0)
5657 return -EINVAL;
5658
5659 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5660}
5661
5662static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5663 size_t list_len, const char *name,
5664 size_t name_len, int type)
5665{
5666 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5667
5668 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5669 return 0;
5670
5671 if (list && len <= list_len)
5672 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5673 return len;
5674}
5675
5676#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5677static inline int nfs4_server_supports_labels(struct nfs_server *server)
5678{
5679 return server->caps & NFS_CAP_SECURITY_LABEL;
5680}
5681
5682static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5683 const void *buf, size_t buflen,
5684 int flags, int type)
5685{
5686 if (security_ismaclabel(key))
5687 return nfs4_set_security_label(dentry, buf, buflen);
5688
5689 return -EOPNOTSUPP;
5690}
5691
5692static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5693 void *buf, size_t buflen, int type)
5694{
5695 if (security_ismaclabel(key))
5696 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5697 return -EOPNOTSUPP;
5698}
5699
5700static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5701 size_t list_len, const char *name,
5702 size_t name_len, int type)
5703{
5704 size_t len = 0;
5705
5706 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5707 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5708 if (list && len <= list_len)
5709 security_inode_listsecurity(dentry->d_inode, list, len);
5710 }
5711 return len;
5712}
5713
5714static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5715 .prefix = XATTR_SECURITY_PREFIX,
5716 .list = nfs4_xattr_list_nfs4_label,
5717 .get = nfs4_xattr_get_nfs4_label,
5718 .set = nfs4_xattr_set_nfs4_label,
5719};
5720#endif
5721
5722
5723/*
5724 * nfs_fhget will use either the mounted_on_fileid or the fileid
5725 */
5726static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5727{
5728 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5729 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5730 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5731 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5732 return;
5733
5734 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5735 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5736 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5737 fattr->nlink = 2;
5738}
5739
5740static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5741 const struct qstr *name,
5742 struct nfs4_fs_locations *fs_locations,
5743 struct page *page)
5744{
5745 struct nfs_server *server = NFS_SERVER(dir);
5746 u32 bitmask[3] = {
5747 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5748 };
5749 struct nfs4_fs_locations_arg args = {
5750 .dir_fh = NFS_FH(dir),
5751 .name = name,
5752 .page = page,
5753 .bitmask = bitmask,
5754 };
5755 struct nfs4_fs_locations_res res = {
5756 .fs_locations = fs_locations,
5757 };
5758 struct rpc_message msg = {
5759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5760 .rpc_argp = &args,
5761 .rpc_resp = &res,
5762 };
5763 int status;
5764
5765 dprintk("%s: start\n", __func__);
5766
5767 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5768 * is not supported */
5769 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5770 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5771 else
5772 bitmask[0] |= FATTR4_WORD0_FILEID;
5773
5774 nfs_fattr_init(&fs_locations->fattr);
5775 fs_locations->server = server;
5776 fs_locations->nlocations = 0;
5777 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5778 dprintk("%s: returned status = %d\n", __func__, status);
5779 return status;
5780}
5781
5782int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5783 const struct qstr *name,
5784 struct nfs4_fs_locations *fs_locations,
5785 struct page *page)
5786{
5787 struct nfs4_exception exception = { };
5788 int err;
5789 do {
5790 err = nfs4_handle_exception(NFS_SERVER(dir),
5791 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5792 &exception);
5793 } while (exception.retry);
5794 return err;
5795}
5796
5797/**
5798 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5799 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5800 */
5801static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5802{
5803 int status;
5804 struct nfs4_secinfo_arg args = {
5805 .dir_fh = NFS_FH(dir),
5806 .name = name,
5807 };
5808 struct nfs4_secinfo_res res = {
5809 .flavors = flavors,
5810 };
5811 struct rpc_message msg = {
5812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5813 .rpc_argp = &args,
5814 .rpc_resp = &res,
5815 };
5816 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5817
5818 dprintk("NFS call secinfo %s\n", name->name);
5819 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5820 dprintk("NFS reply secinfo: %d\n", status);
5821 return status;
5822}
5823
5824int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5825 struct nfs4_secinfo_flavors *flavors)
5826{
5827 struct nfs4_exception exception = { };
5828 int err;
5829 do {
5830 err = nfs4_handle_exception(NFS_SERVER(dir),
5831 _nfs4_proc_secinfo(dir, name, flavors),
5832 &exception);
5833 } while (exception.retry);
5834 return err;
5835}
5836
5837#ifdef CONFIG_NFS_V4_1
5838/*
5839 * Check the exchange flags returned by the server for invalid flags, having
5840 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5841 * DS flags set.
5842 */
5843static int nfs4_check_cl_exchange_flags(u32 flags)
5844{
5845 if (flags & ~EXCHGID4_FLAG_MASK_R)
5846 goto out_inval;
5847 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5848 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5849 goto out_inval;
5850 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5851 goto out_inval;
5852 return NFS_OK;
5853out_inval:
5854 return -NFS4ERR_INVAL;
5855}
5856
5857static bool
5858nfs41_same_server_scope(struct nfs41_server_scope *a,
5859 struct nfs41_server_scope *b)
5860{
5861 if (a->server_scope_sz == b->server_scope_sz &&
5862 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5863 return true;
5864
5865 return false;
5866}
5867
5868/*
5869 * nfs4_proc_bind_conn_to_session()
5870 *
5871 * The 4.1 client currently uses the same TCP connection for the
5872 * fore and backchannel.
5873 */
5874int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5875{
5876 int status;
5877 struct nfs41_bind_conn_to_session_res res;
5878 struct rpc_message msg = {
5879 .rpc_proc =
5880 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5881 .rpc_argp = clp,
5882 .rpc_resp = &res,
5883 .rpc_cred = cred,
5884 };
5885
5886 dprintk("--> %s\n", __func__);
5887
5888 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5889 if (unlikely(res.session == NULL)) {
5890 status = -ENOMEM;
5891 goto out;
5892 }
5893
5894 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5895 if (status == 0) {
5896 if (memcmp(res.session->sess_id.data,
5897 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5898 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5899 status = -EIO;
5900 goto out_session;
5901 }
5902 if (res.dir != NFS4_CDFS4_BOTH) {
5903 dprintk("NFS: %s: Unexpected direction from server\n",
5904 __func__);
5905 status = -EIO;
5906 goto out_session;
5907 }
5908 if (res.use_conn_in_rdma_mode) {
5909 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5910 __func__);
5911 status = -EIO;
5912 goto out_session;
5913 }
5914 }
5915out_session:
5916 kfree(res.session);
5917out:
5918 dprintk("<-- %s status= %d\n", __func__, status);
5919 return status;
5920}
5921
5922/*
5923 * nfs4_proc_exchange_id()
5924 *
5925 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5926 *
5927 * Since the clientid has expired, all compounds using sessions
5928 * associated with the stale clientid will be returning
5929 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5930 * be in some phase of session reset.
5931 */
5932int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5933{
5934 nfs4_verifier verifier;
5935 struct nfs41_exchange_id_args args = {
5936 .verifier = &verifier,
5937 .client = clp,
5938 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5939 EXCHGID4_FLAG_BIND_PRINC_STATEID,
5940 };
5941 struct nfs41_exchange_id_res res = {
5942 0
5943 };
5944 int status;
5945 struct rpc_message msg = {
5946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5947 .rpc_argp = &args,
5948 .rpc_resp = &res,
5949 .rpc_cred = cred,
5950 };
5951
5952 nfs4_init_boot_verifier(clp, &verifier);
5953 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5954 sizeof(args.id));
5955 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5956 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5957 args.id_len, args.id);
5958
5959 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5960 GFP_NOFS);
5961 if (unlikely(res.server_owner == NULL)) {
5962 status = -ENOMEM;
5963 goto out;
5964 }
5965
5966 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5967 GFP_NOFS);
5968 if (unlikely(res.server_scope == NULL)) {
5969 status = -ENOMEM;
5970 goto out_server_owner;
5971 }
5972
5973 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5974 if (unlikely(res.impl_id == NULL)) {
5975 status = -ENOMEM;
5976 goto out_server_scope;
5977 }
5978
5979 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5980 if (status == 0)
5981 status = nfs4_check_cl_exchange_flags(res.flags);
5982
5983 if (status == 0) {
5984 clp->cl_clientid = res.clientid;
5985 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5986 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5987 clp->cl_seqid = res.seqid;
5988
5989 kfree(clp->cl_serverowner);
5990 clp->cl_serverowner = res.server_owner;
5991 res.server_owner = NULL;
5992
5993 /* use the most recent implementation id */
5994 kfree(clp->cl_implid);
5995 clp->cl_implid = res.impl_id;
5996
5997 if (clp->cl_serverscope != NULL &&
5998 !nfs41_same_server_scope(clp->cl_serverscope,
5999 res.server_scope)) {
6000 dprintk("%s: server_scope mismatch detected\n",
6001 __func__);
6002 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6003 kfree(clp->cl_serverscope);
6004 clp->cl_serverscope = NULL;
6005 }
6006
6007 if (clp->cl_serverscope == NULL) {
6008 clp->cl_serverscope = res.server_scope;
6009 goto out;
6010 }
6011 } else
6012 kfree(res.impl_id);
6013
6014out_server_owner:
6015 kfree(res.server_owner);
6016out_server_scope:
6017 kfree(res.server_scope);
6018out:
6019 if (clp->cl_implid != NULL)
6020 dprintk("NFS reply exchange_id: Server Implementation ID: "
6021 "domain: %s, name: %s, date: %llu,%u\n",
6022 clp->cl_implid->domain, clp->cl_implid->name,
6023 clp->cl_implid->date.seconds,
6024 clp->cl_implid->date.nseconds);
6025 dprintk("NFS reply exchange_id: %d\n", status);
6026 return status;
6027}
6028
6029static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6030 struct rpc_cred *cred)
6031{
6032 struct rpc_message msg = {
6033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6034 .rpc_argp = clp,
6035 .rpc_cred = cred,
6036 };
6037 int status;
6038
6039 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6040 if (status)
6041 dprintk("NFS: Got error %d from the server %s on "
6042 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6043 return status;
6044}
6045
6046static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6047 struct rpc_cred *cred)
6048{
6049 unsigned int loop;
6050 int ret;
6051
6052 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6053 ret = _nfs4_proc_destroy_clientid(clp, cred);
6054 switch (ret) {
6055 case -NFS4ERR_DELAY:
6056 case -NFS4ERR_CLIENTID_BUSY:
6057 ssleep(1);
6058 break;
6059 default:
6060 return ret;
6061 }
6062 }
6063 return 0;
6064}
6065
6066int nfs4_destroy_clientid(struct nfs_client *clp)
6067{
6068 struct rpc_cred *cred;
6069 int ret = 0;
6070
6071 if (clp->cl_mvops->minor_version < 1)
6072 goto out;
6073 if (clp->cl_exchange_flags == 0)
6074 goto out;
6075 if (clp->cl_preserve_clid)
6076 goto out;
6077 cred = nfs4_get_clid_cred(clp);
6078 ret = nfs4_proc_destroy_clientid(clp, cred);
6079 if (cred)
6080 put_rpccred(cred);
6081 switch (ret) {
6082 case 0:
6083 case -NFS4ERR_STALE_CLIENTID:
6084 clp->cl_exchange_flags = 0;
6085 }
6086out:
6087 return ret;
6088}
6089
6090struct nfs4_get_lease_time_data {
6091 struct nfs4_get_lease_time_args *args;
6092 struct nfs4_get_lease_time_res *res;
6093 struct nfs_client *clp;
6094};
6095
6096static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6097 void *calldata)
6098{
6099 struct nfs4_get_lease_time_data *data =
6100 (struct nfs4_get_lease_time_data *)calldata;
6101
6102 dprintk("--> %s\n", __func__);
6103 /* just setup sequence, do not trigger session recovery
6104 since we're invoked within one */
6105 nfs41_setup_sequence(data->clp->cl_session,
6106 &data->args->la_seq_args,
6107 &data->res->lr_seq_res,
6108 task);
6109 dprintk("<-- %s\n", __func__);
6110}
6111
6112/*
6113 * Called from nfs4_state_manager thread for session setup, so don't recover
6114 * from sequence operation or clientid errors.
6115 */
6116static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6117{
6118 struct nfs4_get_lease_time_data *data =
6119 (struct nfs4_get_lease_time_data *)calldata;
6120
6121 dprintk("--> %s\n", __func__);
6122 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6123 return;
6124 switch (task->tk_status) {
6125 case -NFS4ERR_DELAY:
6126 case -NFS4ERR_GRACE:
6127 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6128 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6129 task->tk_status = 0;
6130 /* fall through */
6131 case -NFS4ERR_RETRY_UNCACHED_REP:
6132 rpc_restart_call_prepare(task);
6133 return;
6134 }
6135 dprintk("<-- %s\n", __func__);
6136}
6137
6138static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6139 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6140 .rpc_call_done = nfs4_get_lease_time_done,
6141};
6142
6143int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6144{
6145 struct rpc_task *task;
6146 struct nfs4_get_lease_time_args args;
6147 struct nfs4_get_lease_time_res res = {
6148 .lr_fsinfo = fsinfo,
6149 };
6150 struct nfs4_get_lease_time_data data = {
6151 .args = &args,
6152 .res = &res,
6153 .clp = clp,
6154 };
6155 struct rpc_message msg = {
6156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6157 .rpc_argp = &args,
6158 .rpc_resp = &res,
6159 };
6160 struct rpc_task_setup task_setup = {
6161 .rpc_client = clp->cl_rpcclient,
6162 .rpc_message = &msg,
6163 .callback_ops = &nfs4_get_lease_time_ops,
6164 .callback_data = &data,
6165 .flags = RPC_TASK_TIMEOUT,
6166 };
6167 int status;
6168
6169 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
6170 nfs4_set_sequence_privileged(&args.la_seq_args);
6171 dprintk("--> %s\n", __func__);
6172 task = rpc_run_task(&task_setup);
6173
6174 if (IS_ERR(task))
6175 status = PTR_ERR(task);
6176 else {
6177 status = task->tk_status;
6178 rpc_put_task(task);
6179 }
6180 dprintk("<-- %s return %d\n", __func__, status);
6181
6182 return status;
6183}
6184
6185/*
6186 * Initialize the values to be used by the client in CREATE_SESSION
6187 * If nfs4_init_session set the fore channel request and response sizes,
6188 * use them.
6189 *
6190 * Set the back channel max_resp_sz_cached to zero to force the client to
6191 * always set csa_cachethis to FALSE because the current implementation
6192 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6193 */
6194static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6195{
6196 unsigned int max_rqst_sz, max_resp_sz;
6197
6198 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6199 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
6200
6201 /* Fore channel attributes */
6202 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6203 args->fc_attrs.max_resp_sz = max_resp_sz;
6204 args->fc_attrs.max_ops = NFS4_MAX_OPS;
6205 args->fc_attrs.max_reqs = max_session_slots;
6206
6207 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
6208 "max_ops=%u max_reqs=%u\n",
6209 __func__,
6210 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
6211 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
6212
6213 /* Back channel attributes */
6214 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6215 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6216 args->bc_attrs.max_resp_sz_cached = 0;
6217 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6218 args->bc_attrs.max_reqs = 1;
6219
6220 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6221 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6222 __func__,
6223 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6224 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6225 args->bc_attrs.max_reqs);
6226}
6227
6228static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6229{
6230 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6231 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6232
6233 if (rcvd->max_resp_sz > sent->max_resp_sz)
6234 return -EINVAL;
6235 /*
6236 * Our requested max_ops is the minimum we need; we're not
6237 * prepared to break up compounds into smaller pieces than that.
6238 * So, no point even trying to continue if the server won't
6239 * cooperate:
6240 */
6241 if (rcvd->max_ops < sent->max_ops)
6242 return -EINVAL;
6243 if (rcvd->max_reqs == 0)
6244 return -EINVAL;
6245 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6246 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
6247 return 0;
6248}
6249
6250static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6251{
6252 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6253 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
6254
6255 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6256 return -EINVAL;
6257 if (rcvd->max_resp_sz < sent->max_resp_sz)
6258 return -EINVAL;
6259 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6260 return -EINVAL;
6261 /* These would render the backchannel useless: */
6262 if (rcvd->max_ops != sent->max_ops)
6263 return -EINVAL;
6264 if (rcvd->max_reqs != sent->max_reqs)
6265 return -EINVAL;
6266 return 0;
6267}
6268
6269static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6270 struct nfs4_session *session)
6271{
6272 int ret;
6273
6274 ret = nfs4_verify_fore_channel_attrs(args, session);
6275 if (ret)
6276 return ret;
6277 return nfs4_verify_back_channel_attrs(args, session);
6278}
6279
6280static int _nfs4_proc_create_session(struct nfs_client *clp,
6281 struct rpc_cred *cred)
6282{
6283 struct nfs4_session *session = clp->cl_session;
6284 struct nfs41_create_session_args args = {
6285 .client = clp,
6286 .cb_program = NFS4_CALLBACK,
6287 };
6288 struct nfs41_create_session_res res = {
6289 .client = clp,
6290 };
6291 struct rpc_message msg = {
6292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6293 .rpc_argp = &args,
6294 .rpc_resp = &res,
6295 .rpc_cred = cred,
6296 };
6297 int status;
6298
6299 nfs4_init_channel_attrs(&args);
6300 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
6301
6302 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6303
6304 if (!status) {
6305 /* Verify the session's negotiated channel_attrs values */
6306 status = nfs4_verify_channel_attrs(&args, session);
6307 /* Increment the clientid slot sequence id */
6308 clp->cl_seqid++;
6309 }
6310
6311 return status;
6312}
6313
6314/*
6315 * Issues a CREATE_SESSION operation to the server.
6316 * It is the responsibility of the caller to verify the session is
6317 * expired before calling this routine.
6318 */
6319int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
6320{
6321 int status;
6322 unsigned *ptr;
6323 struct nfs4_session *session = clp->cl_session;
6324
6325 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6326
6327 status = _nfs4_proc_create_session(clp, cred);
6328 if (status)
6329 goto out;
6330
6331 /* Init or reset the session slot tables */
6332 status = nfs4_setup_session_slot_tables(session);
6333 dprintk("slot table setup returned %d\n", status);
6334 if (status)
6335 goto out;
6336
6337 ptr = (unsigned *)&session->sess_id.data[0];
6338 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6339 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
6340out:
6341 dprintk("<-- %s\n", __func__);
6342 return status;
6343}
6344
6345/*
6346 * Issue the over-the-wire RPC DESTROY_SESSION.
6347 * The caller must serialize access to this routine.
6348 */
6349int nfs4_proc_destroy_session(struct nfs4_session *session,
6350 struct rpc_cred *cred)
6351{
6352 struct rpc_message msg = {
6353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6354 .rpc_argp = session,
6355 .rpc_cred = cred,
6356 };
6357 int status = 0;
6358
6359 dprintk("--> nfs4_proc_destroy_session\n");
6360
6361 /* session is still being setup */
6362 if (session->clp->cl_cons_state != NFS_CS_READY)
6363 return status;
6364
6365 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6366
6367 if (status)
6368 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6369 "Session has been destroyed regardless...\n", status);
6370
6371 dprintk("<-- nfs4_proc_destroy_session\n");
6372 return status;
6373}
6374
6375/*
6376 * Renew the cl_session lease.
6377 */
6378struct nfs4_sequence_data {
6379 struct nfs_client *clp;
6380 struct nfs4_sequence_args args;
6381 struct nfs4_sequence_res res;
6382};
6383
6384static void nfs41_sequence_release(void *data)
6385{
6386 struct nfs4_sequence_data *calldata = data;
6387 struct nfs_client *clp = calldata->clp;
6388
6389 if (atomic_read(&clp->cl_count) > 1)
6390 nfs4_schedule_state_renewal(clp);
6391 nfs_put_client(clp);
6392 kfree(calldata);
6393}
6394
6395static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6396{
6397 switch(task->tk_status) {
6398 case -NFS4ERR_DELAY:
6399 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6400 return -EAGAIN;
6401 default:
6402 nfs4_schedule_lease_recovery(clp);
6403 }
6404 return 0;
6405}
6406
6407static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6408{
6409 struct nfs4_sequence_data *calldata = data;
6410 struct nfs_client *clp = calldata->clp;
6411
6412 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6413 return;
6414
6415 if (task->tk_status < 0) {
6416 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6417 if (atomic_read(&clp->cl_count) == 1)
6418 goto out;
6419
6420 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6421 rpc_restart_call_prepare(task);
6422 return;
6423 }
6424 }
6425 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6426out:
6427 dprintk("<-- %s\n", __func__);
6428}
6429
6430static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6431{
6432 struct nfs4_sequence_data *calldata = data;
6433 struct nfs_client *clp = calldata->clp;
6434 struct nfs4_sequence_args *args;
6435 struct nfs4_sequence_res *res;
6436
6437 args = task->tk_msg.rpc_argp;
6438 res = task->tk_msg.rpc_resp;
6439
6440 nfs41_setup_sequence(clp->cl_session, args, res, task);
6441}
6442
6443static const struct rpc_call_ops nfs41_sequence_ops = {
6444 .rpc_call_done = nfs41_sequence_call_done,
6445 .rpc_call_prepare = nfs41_sequence_prepare,
6446 .rpc_release = nfs41_sequence_release,
6447};
6448
6449static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6450 struct rpc_cred *cred,
6451 bool is_privileged)
6452{
6453 struct nfs4_sequence_data *calldata;
6454 struct rpc_message msg = {
6455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6456 .rpc_cred = cred,
6457 };
6458 struct rpc_task_setup task_setup_data = {
6459 .rpc_client = clp->cl_rpcclient,
6460 .rpc_message = &msg,
6461 .callback_ops = &nfs41_sequence_ops,
6462 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6463 };
6464
6465 if (!atomic_inc_not_zero(&clp->cl_count))
6466 return ERR_PTR(-EIO);
6467 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6468 if (calldata == NULL) {
6469 nfs_put_client(clp);
6470 return ERR_PTR(-ENOMEM);
6471 }
6472 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6473 if (is_privileged)
6474 nfs4_set_sequence_privileged(&calldata->args);
6475 msg.rpc_argp = &calldata->args;
6476 msg.rpc_resp = &calldata->res;
6477 calldata->clp = clp;
6478 task_setup_data.callback_data = calldata;
6479
6480 return rpc_run_task(&task_setup_data);
6481}
6482
6483static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6484{
6485 struct rpc_task *task;
6486 int ret = 0;
6487
6488 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6489 return 0;
6490 task = _nfs41_proc_sequence(clp, cred, false);
6491 if (IS_ERR(task))
6492 ret = PTR_ERR(task);
6493 else
6494 rpc_put_task_async(task);
6495 dprintk("<-- %s status=%d\n", __func__, ret);
6496 return ret;
6497}
6498
6499static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6500{
6501 struct rpc_task *task;
6502 int ret;
6503
6504 task = _nfs41_proc_sequence(clp, cred, true);
6505 if (IS_ERR(task)) {
6506 ret = PTR_ERR(task);
6507 goto out;
6508 }
6509 ret = rpc_wait_for_completion_task(task);
6510 if (!ret) {
6511 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6512
6513 if (task->tk_status == 0)
6514 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6515 ret = task->tk_status;
6516 }
6517 rpc_put_task(task);
6518out:
6519 dprintk("<-- %s status=%d\n", __func__, ret);
6520 return ret;
6521}
6522
6523struct nfs4_reclaim_complete_data {
6524 struct nfs_client *clp;
6525 struct nfs41_reclaim_complete_args arg;
6526 struct nfs41_reclaim_complete_res res;
6527};
6528
6529static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6530{
6531 struct nfs4_reclaim_complete_data *calldata = data;
6532
6533 nfs41_setup_sequence(calldata->clp->cl_session,
6534 &calldata->arg.seq_args,
6535 &calldata->res.seq_res,
6536 task);
6537}
6538
6539static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6540{
6541 switch(task->tk_status) {
6542 case 0:
6543 case -NFS4ERR_COMPLETE_ALREADY:
6544 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6545 break;
6546 case -NFS4ERR_DELAY:
6547 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6548 /* fall through */
6549 case -NFS4ERR_RETRY_UNCACHED_REP:
6550 return -EAGAIN;
6551 default:
6552 nfs4_schedule_lease_recovery(clp);
6553 }
6554 return 0;
6555}
6556
6557static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6558{
6559 struct nfs4_reclaim_complete_data *calldata = data;
6560 struct nfs_client *clp = calldata->clp;
6561 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6562
6563 dprintk("--> %s\n", __func__);
6564 if (!nfs41_sequence_done(task, res))
6565 return;
6566
6567 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6568 rpc_restart_call_prepare(task);
6569 return;
6570 }
6571 dprintk("<-- %s\n", __func__);
6572}
6573
6574static void nfs4_free_reclaim_complete_data(void *data)
6575{
6576 struct nfs4_reclaim_complete_data *calldata = data;
6577
6578 kfree(calldata);
6579}
6580
6581static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6582 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6583 .rpc_call_done = nfs4_reclaim_complete_done,
6584 .rpc_release = nfs4_free_reclaim_complete_data,
6585};
6586
6587/*
6588 * Issue a global reclaim complete.
6589 */
6590static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6591 struct rpc_cred *cred)
6592{
6593 struct nfs4_reclaim_complete_data *calldata;
6594 struct rpc_task *task;
6595 struct rpc_message msg = {
6596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6597 .rpc_cred = cred,
6598 };
6599 struct rpc_task_setup task_setup_data = {
6600 .rpc_client = clp->cl_rpcclient,
6601 .rpc_message = &msg,
6602 .callback_ops = &nfs4_reclaim_complete_call_ops,
6603 .flags = RPC_TASK_ASYNC,
6604 };
6605 int status = -ENOMEM;
6606
6607 dprintk("--> %s\n", __func__);
6608 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6609 if (calldata == NULL)
6610 goto out;
6611 calldata->clp = clp;
6612 calldata->arg.one_fs = 0;
6613
6614 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6615 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6616 msg.rpc_argp = &calldata->arg;
6617 msg.rpc_resp = &calldata->res;
6618 task_setup_data.callback_data = calldata;
6619 task = rpc_run_task(&task_setup_data);
6620 if (IS_ERR(task)) {
6621 status = PTR_ERR(task);
6622 goto out;
6623 }
6624 status = nfs4_wait_for_completion_rpc_task(task);
6625 if (status == 0)
6626 status = task->tk_status;
6627 rpc_put_task(task);
6628 return 0;
6629out:
6630 dprintk("<-- %s status=%d\n", __func__, status);
6631 return status;
6632}
6633
6634static void
6635nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6636{
6637 struct nfs4_layoutget *lgp = calldata;
6638 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6639 struct nfs4_session *session = nfs4_get_session(server);
6640
6641 dprintk("--> %s\n", __func__);
6642 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6643 * right now covering the LAYOUTGET we are about to send.
6644 * However, that is not so catastrophic, and there seems
6645 * to be no way to prevent it completely.
6646 */
6647 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6648 &lgp->res.seq_res, task))
6649 return;
6650 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6651 NFS_I(lgp->args.inode)->layout,
6652 lgp->args.ctx->state)) {
6653 rpc_exit(task, NFS4_OK);
6654 }
6655}
6656
6657static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6658{
6659 struct nfs4_layoutget *lgp = calldata;
6660 struct inode *inode = lgp->args.inode;
6661 struct nfs_server *server = NFS_SERVER(inode);
6662 struct pnfs_layout_hdr *lo;
6663 struct nfs4_state *state = NULL;
6664 unsigned long timeo, giveup;
6665
6666 dprintk("--> %s\n", __func__);
6667
6668 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6669 goto out;
6670
6671 switch (task->tk_status) {
6672 case 0:
6673 goto out;
6674 case -NFS4ERR_LAYOUTTRYLATER:
6675 case -NFS4ERR_RECALLCONFLICT:
6676 timeo = rpc_get_timeout(task->tk_client);
6677 giveup = lgp->args.timestamp + timeo;
6678 if (time_after(giveup, jiffies))
6679 task->tk_status = -NFS4ERR_DELAY;
6680 break;
6681 case -NFS4ERR_EXPIRED:
6682 case -NFS4ERR_BAD_STATEID:
6683 spin_lock(&inode->i_lock);
6684 lo = NFS_I(inode)->layout;
6685 if (!lo || list_empty(&lo->plh_segs)) {
6686 spin_unlock(&inode->i_lock);
6687 /* If the open stateid was bad, then recover it. */
6688 state = lgp->args.ctx->state;
6689 } else {
6690 LIST_HEAD(head);
6691
6692 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6693 spin_unlock(&inode->i_lock);
6694 /* Mark the bad layout state as invalid, then
6695 * retry using the open stateid. */
6696 pnfs_free_lseg_list(&head);
6697 }
6698 }
6699 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6700 rpc_restart_call_prepare(task);
6701out:
6702 dprintk("<-- %s\n", __func__);
6703}
6704
6705static size_t max_response_pages(struct nfs_server *server)
6706{
6707 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6708 return nfs_page_array_len(0, max_resp_sz);
6709}
6710
6711static void nfs4_free_pages(struct page **pages, size_t size)
6712{
6713 int i;
6714
6715 if (!pages)
6716 return;
6717
6718 for (i = 0; i < size; i++) {
6719 if (!pages[i])
6720 break;
6721 __free_page(pages[i]);
6722 }
6723 kfree(pages);
6724}
6725
6726static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6727{
6728 struct page **pages;
6729 int i;
6730
6731 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6732 if (!pages) {
6733 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6734 return NULL;
6735 }
6736
6737 for (i = 0; i < size; i++) {
6738 pages[i] = alloc_page(gfp_flags);
6739 if (!pages[i]) {
6740 dprintk("%s: failed to allocate page\n", __func__);
6741 nfs4_free_pages(pages, size);
6742 return NULL;
6743 }
6744 }
6745
6746 return pages;
6747}
6748
6749static void nfs4_layoutget_release(void *calldata)
6750{
6751 struct nfs4_layoutget *lgp = calldata;
6752 struct inode *inode = lgp->args.inode;
6753 struct nfs_server *server = NFS_SERVER(inode);
6754 size_t max_pages = max_response_pages(server);
6755
6756 dprintk("--> %s\n", __func__);
6757 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6758 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6759 put_nfs_open_context(lgp->args.ctx);
6760 kfree(calldata);
6761 dprintk("<-- %s\n", __func__);
6762}
6763
6764static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6765 .rpc_call_prepare = nfs4_layoutget_prepare,
6766 .rpc_call_done = nfs4_layoutget_done,
6767 .rpc_release = nfs4_layoutget_release,
6768};
6769
6770struct pnfs_layout_segment *
6771nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6772{
6773 struct inode *inode = lgp->args.inode;
6774 struct nfs_server *server = NFS_SERVER(inode);
6775 size_t max_pages = max_response_pages(server);
6776 struct rpc_task *task;
6777 struct rpc_message msg = {
6778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6779 .rpc_argp = &lgp->args,
6780 .rpc_resp = &lgp->res,
6781 .rpc_cred = lgp->cred,
6782 };
6783 struct rpc_task_setup task_setup_data = {
6784 .rpc_client = server->client,
6785 .rpc_message = &msg,
6786 .callback_ops = &nfs4_layoutget_call_ops,
6787 .callback_data = lgp,
6788 .flags = RPC_TASK_ASYNC,
6789 };
6790 struct pnfs_layout_segment *lseg = NULL;
6791 int status = 0;
6792
6793 dprintk("--> %s\n", __func__);
6794
6795 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6796 if (!lgp->args.layout.pages) {
6797 nfs4_layoutget_release(lgp);
6798 return ERR_PTR(-ENOMEM);
6799 }
6800 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6801 lgp->args.timestamp = jiffies;
6802
6803 lgp->res.layoutp = &lgp->args.layout;
6804 lgp->res.seq_res.sr_slot = NULL;
6805 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6806
6807 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6808 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6809
6810 task = rpc_run_task(&task_setup_data);
6811 if (IS_ERR(task))
6812 return ERR_CAST(task);
6813 status = nfs4_wait_for_completion_rpc_task(task);
6814 if (status == 0)
6815 status = task->tk_status;
6816 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6817 if (status == 0 && lgp->res.layoutp->len)
6818 lseg = pnfs_layout_process(lgp);
6819 rpc_put_task(task);
6820 dprintk("<-- %s status=%d\n", __func__, status);
6821 if (status)
6822 return ERR_PTR(status);
6823 return lseg;
6824}
6825
6826static void
6827nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6828{
6829 struct nfs4_layoutreturn *lrp = calldata;
6830
6831 dprintk("--> %s\n", __func__);
6832 nfs41_setup_sequence(lrp->clp->cl_session,
6833 &lrp->args.seq_args,
6834 &lrp->res.seq_res,
6835 task);
6836}
6837
6838static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6839{
6840 struct nfs4_layoutreturn *lrp = calldata;
6841 struct nfs_server *server;
6842
6843 dprintk("--> %s\n", __func__);
6844
6845 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6846 return;
6847
6848 server = NFS_SERVER(lrp->args.inode);
6849 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6850 rpc_restart_call_prepare(task);
6851 return;
6852 }
6853 dprintk("<-- %s\n", __func__);
6854}
6855
6856static void nfs4_layoutreturn_release(void *calldata)
6857{
6858 struct nfs4_layoutreturn *lrp = calldata;
6859 struct pnfs_layout_hdr *lo = lrp->args.layout;
6860
6861 dprintk("--> %s\n", __func__);
6862 spin_lock(&lo->plh_inode->i_lock);
6863 if (lrp->res.lrs_present)
6864 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6865 lo->plh_block_lgets--;
6866 spin_unlock(&lo->plh_inode->i_lock);
6867 pnfs_put_layout_hdr(lrp->args.layout);
6868 kfree(calldata);
6869 dprintk("<-- %s\n", __func__);
6870}
6871
6872static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6873 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6874 .rpc_call_done = nfs4_layoutreturn_done,
6875 .rpc_release = nfs4_layoutreturn_release,
6876};
6877
6878int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6879{
6880 struct rpc_task *task;
6881 struct rpc_message msg = {
6882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6883 .rpc_argp = &lrp->args,
6884 .rpc_resp = &lrp->res,
6885 .rpc_cred = lrp->cred,
6886 };
6887 struct rpc_task_setup task_setup_data = {
6888 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
6889 .rpc_message = &msg,
6890 .callback_ops = &nfs4_layoutreturn_call_ops,
6891 .callback_data = lrp,
6892 };
6893 int status;
6894
6895 dprintk("--> %s\n", __func__);
6896 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6897 task = rpc_run_task(&task_setup_data);
6898 if (IS_ERR(task))
6899 return PTR_ERR(task);
6900 status = task->tk_status;
6901 dprintk("<-- %s status=%d\n", __func__, status);
6902 rpc_put_task(task);
6903 return status;
6904}
6905
6906/*
6907 * Retrieve the list of Data Server devices from the MDS.
6908 */
6909static int _nfs4_getdevicelist(struct nfs_server *server,
6910 const struct nfs_fh *fh,
6911 struct pnfs_devicelist *devlist)
6912{
6913 struct nfs4_getdevicelist_args args = {
6914 .fh = fh,
6915 .layoutclass = server->pnfs_curr_ld->id,
6916 };
6917 struct nfs4_getdevicelist_res res = {
6918 .devlist = devlist,
6919 };
6920 struct rpc_message msg = {
6921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6922 .rpc_argp = &args,
6923 .rpc_resp = &res,
6924 };
6925 int status;
6926
6927 dprintk("--> %s\n", __func__);
6928 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6929 &res.seq_res, 0);
6930 dprintk("<-- %s status=%d\n", __func__, status);
6931 return status;
6932}
6933
6934int nfs4_proc_getdevicelist(struct nfs_server *server,
6935 const struct nfs_fh *fh,
6936 struct pnfs_devicelist *devlist)
6937{
6938 struct nfs4_exception exception = { };
6939 int err;
6940
6941 do {
6942 err = nfs4_handle_exception(server,
6943 _nfs4_getdevicelist(server, fh, devlist),
6944 &exception);
6945 } while (exception.retry);
6946
6947 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6948 err, devlist->num_devs);
6949
6950 return err;
6951}
6952EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6953
6954static int
6955_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6956 struct pnfs_device *pdev,
6957 struct rpc_cred *cred)
6958{
6959 struct nfs4_getdeviceinfo_args args = {
6960 .pdev = pdev,
6961 };
6962 struct nfs4_getdeviceinfo_res res = {
6963 .pdev = pdev,
6964 };
6965 struct rpc_message msg = {
6966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6967 .rpc_argp = &args,
6968 .rpc_resp = &res,
6969 .rpc_cred = cred,
6970 };
6971 int status;
6972
6973 dprintk("--> %s\n", __func__);
6974 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6975 dprintk("<-- %s status=%d\n", __func__, status);
6976
6977 return status;
6978}
6979
6980int nfs4_proc_getdeviceinfo(struct nfs_server *server,
6981 struct pnfs_device *pdev,
6982 struct rpc_cred *cred)
6983{
6984 struct nfs4_exception exception = { };
6985 int err;
6986
6987 do {
6988 err = nfs4_handle_exception(server,
6989 _nfs4_proc_getdeviceinfo(server, pdev, cred),
6990 &exception);
6991 } while (exception.retry);
6992 return err;
6993}
6994EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6995
6996static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6997{
6998 struct nfs4_layoutcommit_data *data = calldata;
6999 struct nfs_server *server = NFS_SERVER(data->args.inode);
7000 struct nfs4_session *session = nfs4_get_session(server);
7001
7002 nfs41_setup_sequence(session,
7003 &data->args.seq_args,
7004 &data->res.seq_res,
7005 task);
7006}
7007
7008static void
7009nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7010{
7011 struct nfs4_layoutcommit_data *data = calldata;
7012 struct nfs_server *server = NFS_SERVER(data->args.inode);
7013
7014 if (!nfs41_sequence_done(task, &data->res.seq_res))
7015 return;
7016
7017 switch (task->tk_status) { /* Just ignore these failures */
7018 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7019 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7020 case -NFS4ERR_BADLAYOUT: /* no layout */
7021 case -NFS4ERR_GRACE: /* loca_recalim always false */
7022 task->tk_status = 0;
7023 break;
7024 case 0:
7025 nfs_post_op_update_inode_force_wcc(data->args.inode,
7026 data->res.fattr);
7027 break;
7028 default:
7029 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7030 rpc_restart_call_prepare(task);
7031 return;
7032 }
7033 }
7034}
7035
7036static void nfs4_layoutcommit_release(void *calldata)
7037{
7038 struct nfs4_layoutcommit_data *data = calldata;
7039
7040 pnfs_cleanup_layoutcommit(data);
7041 put_rpccred(data->cred);
7042 kfree(data);
7043}
7044
7045static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7046 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7047 .rpc_call_done = nfs4_layoutcommit_done,
7048 .rpc_release = nfs4_layoutcommit_release,
7049};
7050
7051int
7052nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7053{
7054 struct rpc_message msg = {
7055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7056 .rpc_argp = &data->args,
7057 .rpc_resp = &data->res,
7058 .rpc_cred = data->cred,
7059 };
7060 struct rpc_task_setup task_setup_data = {
7061 .task = &data->task,
7062 .rpc_client = NFS_CLIENT(data->args.inode),
7063 .rpc_message = &msg,
7064 .callback_ops = &nfs4_layoutcommit_ops,
7065 .callback_data = data,
7066 .flags = RPC_TASK_ASYNC,
7067 };
7068 struct rpc_task *task;
7069 int status = 0;
7070
7071 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7072 "lbw: %llu inode %lu\n",
7073 data->task.tk_pid, sync,
7074 data->args.lastbytewritten,
7075 data->args.inode->i_ino);
7076
7077 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7078 task = rpc_run_task(&task_setup_data);
7079 if (IS_ERR(task))
7080 return PTR_ERR(task);
7081 if (sync == false)
7082 goto out;
7083 status = nfs4_wait_for_completion_rpc_task(task);
7084 if (status != 0)
7085 goto out;
7086 status = task->tk_status;
7087out:
7088 dprintk("%s: status %d\n", __func__, status);
7089 rpc_put_task(task);
7090 return status;
7091}
7092
7093/**
7094 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7095 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7096 */
7097static int
7098_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7099 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7100{
7101 struct nfs41_secinfo_no_name_args args = {
7102 .style = SECINFO_STYLE_CURRENT_FH,
7103 };
7104 struct nfs4_secinfo_res res = {
7105 .flavors = flavors,
7106 };
7107 struct rpc_message msg = {
7108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7109 .rpc_argp = &args,
7110 .rpc_resp = &res,
7111 };
7112 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7113 &args.seq_args, &res.seq_res, 0);
7114}
7115
7116static int
7117nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7118 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7119{
7120 struct nfs4_exception exception = { };
7121 int err;
7122 do {
7123 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7124 switch (err) {
7125 case 0:
7126 case -NFS4ERR_WRONGSEC:
7127 case -NFS4ERR_NOTSUPP:
7128 goto out;
7129 default:
7130 err = nfs4_handle_exception(server, err, &exception);
7131 }
7132 } while (exception.retry);
7133out:
7134 return err;
7135}
7136
7137static int
7138nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7139 struct nfs_fsinfo *info)
7140{
7141 int err;
7142 struct page *page;
7143 rpc_authflavor_t flavor;
7144 struct nfs4_secinfo_flavors *flavors;
7145
7146 page = alloc_page(GFP_KERNEL);
7147 if (!page) {
7148 err = -ENOMEM;
7149 goto out;
7150 }
7151
7152 flavors = page_address(page);
7153 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7154
7155 /*
7156 * Fall back on "guess and check" method if
7157 * the server doesn't support SECINFO_NO_NAME
7158 */
7159 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7160 err = nfs4_find_root_sec(server, fhandle, info);
7161 goto out_freepage;
7162 }
7163 if (err)
7164 goto out_freepage;
7165
7166 flavor = nfs_find_best_sec(flavors);
7167 if (err == 0)
7168 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7169
7170out_freepage:
7171 put_page(page);
7172 if (err == -EACCES)
7173 return -EPERM;
7174out:
7175 return err;
7176}
7177
7178static int _nfs41_test_stateid(struct nfs_server *server,
7179 nfs4_stateid *stateid,
7180 struct rpc_cred *cred)
7181{
7182 int status;
7183 struct nfs41_test_stateid_args args = {
7184 .stateid = stateid,
7185 };
7186 struct nfs41_test_stateid_res res;
7187 struct rpc_message msg = {
7188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7189 .rpc_argp = &args,
7190 .rpc_resp = &res,
7191 .rpc_cred = cred,
7192 };
7193
7194 dprintk("NFS call test_stateid %p\n", stateid);
7195 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
7196 nfs4_set_sequence_privileged(&args.seq_args);
7197 status = nfs4_call_sync_sequence(server->client, server, &msg,
7198 &args.seq_args, &res.seq_res);
7199 if (status != NFS_OK) {
7200 dprintk("NFS reply test_stateid: failed, %d\n", status);
7201 return status;
7202 }
7203 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
7204 return -res.status;
7205}
7206
7207/**
7208 * nfs41_test_stateid - perform a TEST_STATEID operation
7209 *
7210 * @server: server / transport on which to perform the operation
7211 * @stateid: state ID to test
7212 * @cred: credential
7213 *
7214 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7215 * Otherwise a negative NFS4ERR value is returned if the operation
7216 * failed or the state ID is not currently valid.
7217 */
7218static int nfs41_test_stateid(struct nfs_server *server,
7219 nfs4_stateid *stateid,
7220 struct rpc_cred *cred)
7221{
7222 struct nfs4_exception exception = { };
7223 int err;
7224 do {
7225 err = _nfs41_test_stateid(server, stateid, cred);
7226 if (err != -NFS4ERR_DELAY)
7227 break;
7228 nfs4_handle_exception(server, err, &exception);
7229 } while (exception.retry);
7230 return err;
7231}
7232
7233struct nfs_free_stateid_data {
7234 struct nfs_server *server;
7235 struct nfs41_free_stateid_args args;
7236 struct nfs41_free_stateid_res res;
7237};
7238
7239static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7240{
7241 struct nfs_free_stateid_data *data = calldata;
7242 nfs41_setup_sequence(nfs4_get_session(data->server),
7243 &data->args.seq_args,
7244 &data->res.seq_res,
7245 task);
7246}
7247
7248static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7249{
7250 struct nfs_free_stateid_data *data = calldata;
7251
7252 nfs41_sequence_done(task, &data->res.seq_res);
7253
7254 switch (task->tk_status) {
7255 case -NFS4ERR_DELAY:
7256 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7257 rpc_restart_call_prepare(task);
7258 }
7259}
7260
7261static void nfs41_free_stateid_release(void *calldata)
7262{
7263 kfree(calldata);
7264}
7265
7266const struct rpc_call_ops nfs41_free_stateid_ops = {
7267 .rpc_call_prepare = nfs41_free_stateid_prepare,
7268 .rpc_call_done = nfs41_free_stateid_done,
7269 .rpc_release = nfs41_free_stateid_release,
7270};
7271
7272static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7273 nfs4_stateid *stateid,
7274 struct rpc_cred *cred,
7275 bool privileged)
7276{
7277 struct rpc_message msg = {
7278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
7279 .rpc_cred = cred,
7280 };
7281 struct rpc_task_setup task_setup = {
7282 .rpc_client = server->client,
7283 .rpc_message = &msg,
7284 .callback_ops = &nfs41_free_stateid_ops,
7285 .flags = RPC_TASK_ASYNC,
7286 };
7287 struct nfs_free_stateid_data *data;
7288
7289 dprintk("NFS call free_stateid %p\n", stateid);
7290 data = kmalloc(sizeof(*data), GFP_NOFS);
7291 if (!data)
7292 return ERR_PTR(-ENOMEM);
7293 data->server = server;
7294 nfs4_stateid_copy(&data->args.stateid, stateid);
7295
7296 task_setup.callback_data = data;
7297
7298 msg.rpc_argp = &data->args;
7299 msg.rpc_resp = &data->res;
7300 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7301 if (privileged)
7302 nfs4_set_sequence_privileged(&data->args.seq_args);
7303
7304 return rpc_run_task(&task_setup);
7305}
7306
7307/**
7308 * nfs41_free_stateid - perform a FREE_STATEID operation
7309 *
7310 * @server: server / transport on which to perform the operation
7311 * @stateid: state ID to release
7312 * @cred: credential
7313 *
7314 * Returns NFS_OK if the server freed "stateid". Otherwise a
7315 * negative NFS4ERR value is returned.
7316 */
7317static int nfs41_free_stateid(struct nfs_server *server,
7318 nfs4_stateid *stateid,
7319 struct rpc_cred *cred)
7320{
7321 struct rpc_task *task;
7322 int ret;
7323
7324 task = _nfs41_free_stateid(server, stateid, cred, true);
7325 if (IS_ERR(task))
7326 return PTR_ERR(task);
7327 ret = rpc_wait_for_completion_task(task);
7328 if (!ret)
7329 ret = task->tk_status;
7330 rpc_put_task(task);
7331 return ret;
7332}
7333
7334static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7335{
7336 struct rpc_task *task;
7337 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
7338
7339 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
7340 nfs4_free_lock_state(server, lsp);
7341 if (IS_ERR(task))
7342 return PTR_ERR(task);
7343 rpc_put_task(task);
7344 return 0;
7345}
7346
7347static bool nfs41_match_stateid(const nfs4_stateid *s1,
7348 const nfs4_stateid *s2)
7349{
7350 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7351 return false;
7352
7353 if (s1->seqid == s2->seqid)
7354 return true;
7355 if (s1->seqid == 0 || s2->seqid == 0)
7356 return true;
7357
7358 return false;
7359}
7360
7361#endif /* CONFIG_NFS_V4_1 */
7362
7363static bool nfs4_match_stateid(const nfs4_stateid *s1,
7364 const nfs4_stateid *s2)
7365{
7366 return nfs4_stateid_match(s1, s2);
7367}
7368
7369
7370static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7371 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7372 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7373 .recover_open = nfs4_open_reclaim,
7374 .recover_lock = nfs4_lock_reclaim,
7375 .establish_clid = nfs4_init_clientid,
7376 .detect_trunking = nfs40_discover_server_trunking,
7377};
7378
7379#if defined(CONFIG_NFS_V4_1)
7380static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7381 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7382 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7383 .recover_open = nfs4_open_reclaim,
7384 .recover_lock = nfs4_lock_reclaim,
7385 .establish_clid = nfs41_init_clientid,
7386 .reclaim_complete = nfs41_proc_reclaim_complete,
7387 .detect_trunking = nfs41_discover_server_trunking,
7388};
7389#endif /* CONFIG_NFS_V4_1 */
7390
7391static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7392 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7393 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7394 .recover_open = nfs4_open_expired,
7395 .recover_lock = nfs4_lock_expired,
7396 .establish_clid = nfs4_init_clientid,
7397};
7398
7399#if defined(CONFIG_NFS_V4_1)
7400static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7401 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7402 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7403 .recover_open = nfs41_open_expired,
7404 .recover_lock = nfs41_lock_expired,
7405 .establish_clid = nfs41_init_clientid,
7406};
7407#endif /* CONFIG_NFS_V4_1 */
7408
7409static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7410 .sched_state_renewal = nfs4_proc_async_renew,
7411 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7412 .renew_lease = nfs4_proc_renew,
7413};
7414
7415#if defined(CONFIG_NFS_V4_1)
7416static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7417 .sched_state_renewal = nfs41_proc_async_sequence,
7418 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7419 .renew_lease = nfs4_proc_sequence,
7420};
7421#endif
7422
7423static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7424 .minor_version = 0,
7425 .init_caps = NFS_CAP_READDIRPLUS
7426 | NFS_CAP_ATOMIC_OPEN
7427 | NFS_CAP_CHANGE_ATTR
7428 | NFS_CAP_POSIX_LOCK,
7429 .call_sync = _nfs4_call_sync,
7430 .match_stateid = nfs4_match_stateid,
7431 .find_root_sec = nfs4_find_root_sec,
7432 .free_lock_state = nfs4_release_lockowner,
7433 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7434 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7435 .state_renewal_ops = &nfs40_state_renewal_ops,
7436};
7437
7438#if defined(CONFIG_NFS_V4_1)
7439static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7440 .minor_version = 1,
7441 .init_caps = NFS_CAP_READDIRPLUS
7442 | NFS_CAP_ATOMIC_OPEN
7443 | NFS_CAP_CHANGE_ATTR
7444 | NFS_CAP_POSIX_LOCK
7445 | NFS_CAP_STATEID_NFSV41
7446 | NFS_CAP_ATOMIC_OPEN_V1,
7447 .call_sync = nfs4_call_sync_sequence,
7448 .match_stateid = nfs41_match_stateid,
7449 .find_root_sec = nfs41_find_root_sec,
7450 .free_lock_state = nfs41_free_lock_state,
7451 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7452 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7453 .state_renewal_ops = &nfs41_state_renewal_ops,
7454};
7455#endif
7456
7457#if defined(CONFIG_NFS_V4_2)
7458static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7459 .minor_version = 2,
7460 .init_caps = NFS_CAP_READDIRPLUS
7461 | NFS_CAP_ATOMIC_OPEN
7462 | NFS_CAP_CHANGE_ATTR
7463 | NFS_CAP_POSIX_LOCK
7464 | NFS_CAP_STATEID_NFSV41
7465 | NFS_CAP_ATOMIC_OPEN_V1,
7466 .call_sync = nfs4_call_sync_sequence,
7467 .match_stateid = nfs41_match_stateid,
7468 .find_root_sec = nfs41_find_root_sec,
7469 .free_lock_state = nfs41_free_lock_state,
7470 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7471 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7472 .state_renewal_ops = &nfs41_state_renewal_ops,
7473};
7474#endif
7475
7476const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7477 [0] = &nfs_v4_0_minor_ops,
7478#if defined(CONFIG_NFS_V4_1)
7479 [1] = &nfs_v4_1_minor_ops,
7480#endif
7481#if defined(CONFIG_NFS_V4_2)
7482 [2] = &nfs_v4_2_minor_ops,
7483#endif
7484};
7485
7486const struct inode_operations nfs4_dir_inode_operations = {
7487 .create = nfs_create,
7488 .lookup = nfs_lookup,
7489 .atomic_open = nfs_atomic_open,
7490 .link = nfs_link,
7491 .unlink = nfs_unlink,
7492 .symlink = nfs_symlink,
7493 .mkdir = nfs_mkdir,
7494 .rmdir = nfs_rmdir,
7495 .mknod = nfs_mknod,
7496 .rename = nfs_rename,
7497 .permission = nfs_permission,
7498 .getattr = nfs_getattr,
7499 .setattr = nfs_setattr,
7500 .getxattr = generic_getxattr,
7501 .setxattr = generic_setxattr,
7502 .listxattr = generic_listxattr,
7503 .removexattr = generic_removexattr,
7504};
7505
7506static const struct inode_operations nfs4_file_inode_operations = {
7507 .permission = nfs_permission,
7508 .getattr = nfs_getattr,
7509 .setattr = nfs_setattr,
7510 .getxattr = generic_getxattr,
7511 .setxattr = generic_setxattr,
7512 .listxattr = generic_listxattr,
7513 .removexattr = generic_removexattr,
7514};
7515
7516const struct nfs_rpc_ops nfs_v4_clientops = {
7517 .version = 4, /* protocol version */
7518 .dentry_ops = &nfs4_dentry_operations,
7519 .dir_inode_ops = &nfs4_dir_inode_operations,
7520 .file_inode_ops = &nfs4_file_inode_operations,
7521 .file_ops = &nfs4_file_operations,
7522 .getroot = nfs4_proc_get_root,
7523 .submount = nfs4_submount,
7524 .try_mount = nfs4_try_mount,
7525 .getattr = nfs4_proc_getattr,
7526 .setattr = nfs4_proc_setattr,
7527 .lookup = nfs4_proc_lookup,
7528 .access = nfs4_proc_access,
7529 .readlink = nfs4_proc_readlink,
7530 .create = nfs4_proc_create,
7531 .remove = nfs4_proc_remove,
7532 .unlink_setup = nfs4_proc_unlink_setup,
7533 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7534 .unlink_done = nfs4_proc_unlink_done,
7535 .rename = nfs4_proc_rename,
7536 .rename_setup = nfs4_proc_rename_setup,
7537 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7538 .rename_done = nfs4_proc_rename_done,
7539 .link = nfs4_proc_link,
7540 .symlink = nfs4_proc_symlink,
7541 .mkdir = nfs4_proc_mkdir,
7542 .rmdir = nfs4_proc_remove,
7543 .readdir = nfs4_proc_readdir,
7544 .mknod = nfs4_proc_mknod,
7545 .statfs = nfs4_proc_statfs,
7546 .fsinfo = nfs4_proc_fsinfo,
7547 .pathconf = nfs4_proc_pathconf,
7548 .set_capabilities = nfs4_server_capabilities,
7549 .decode_dirent = nfs4_decode_dirent,
7550 .read_setup = nfs4_proc_read_setup,
7551 .read_pageio_init = pnfs_pageio_init_read,
7552 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7553 .read_done = nfs4_read_done,
7554 .write_setup = nfs4_proc_write_setup,
7555 .write_pageio_init = pnfs_pageio_init_write,
7556 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7557 .write_done = nfs4_write_done,
7558 .commit_setup = nfs4_proc_commit_setup,
7559 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7560 .commit_done = nfs4_commit_done,
7561 .lock = nfs4_proc_lock,
7562 .clear_acl_cache = nfs4_zap_acl_attr,
7563 .close_context = nfs4_close_context,
7564 .open_context = nfs4_atomic_open,
7565 .have_delegation = nfs4_have_delegation,
7566 .return_delegation = nfs4_inode_return_delegation,
7567 .alloc_client = nfs4_alloc_client,
7568 .init_client = nfs4_init_client,
7569 .free_client = nfs4_free_client,
7570 .create_server = nfs4_create_server,
7571 .clone_server = nfs_clone_server,
7572};
7573
7574static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7575 .prefix = XATTR_NAME_NFSV4_ACL,
7576 .list = nfs4_xattr_list_nfs4_acl,
7577 .get = nfs4_xattr_get_nfs4_acl,
7578 .set = nfs4_xattr_set_nfs4_acl,
7579};
7580
7581const struct xattr_handler *nfs4_xattr_handlers[] = {
7582 &nfs4_xattr_nfs4_acl_handler,
7583#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7584 &nfs4_xattr_nfs4_label_handler,
7585#endif
7586 NULL
7587};
7588
7589/*
7590 * Local variables:
7591 * c-basic-offset: 8
7592 * End:
7593 */
Linux 6.x block layer and io_uring tree(s)