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