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